1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.834 2007/02/18 01:52:20 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonnet;
31:
32: use strict;
33: use LWP::UserAgent();
34: use HTTP::Headers;
35: use HTTP::Date;
36: # use Date::Parse;
37: use vars
38: qw(%perlvar %hostname %badServerCache %iphost %spareid %hostdom
39: %libserv %pr %prp $memcache %packagetab
40: %courselogs %accesshash %userrolehash %domainrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf %coursetypebuf
42: %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati %domain_primary
44: $tmpdir $_64bit %env);
45:
46: use IO::Socket;
47: use GDBM_File;
48: use HTML::LCParser;
49: use HTML::Parser;
50: use Fcntl qw(:flock);
51: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
52: use Time::HiRes qw( gettimeofday tv_interval );
53: use Cache::Memcached;
54: use Digest::MD5;
55: use Math::Random;
56: use LONCAPA qw(:DEFAULT :match);
57: use LONCAPA::Configuration;
58:
59: my $readit;
60: my $max_connection_retries = 10; # Or some such value.
61:
62: require Exporter;
63:
64: our @ISA = qw (Exporter);
65: our @EXPORT = qw(%env);
66:
67: =pod
68:
69: =head1 Package Variables
70:
71: These are largely undocumented, so if you decipher one please note it here.
72:
73: =over 4
74:
75: =item $processmarker
76:
77: Contains the time this process was started and this servers host id.
78:
79: =item $dumpcount
80:
81: Counts the number of times a message log flush has been attempted (regardless
82: of success) by this process. Used as part of the filename when messages are
83: delayed.
84:
85: =back
86:
87: =cut
88:
89:
90: # --------------------------------------------------------------------- Logging
91: {
92: my $logid;
93: sub instructor_log {
94: my ($hash_name,$storehash,$delflag,$uname,$udom)=@_;
95: $logid++;
96: my $id=time().'00000'.$$.'00000'.$logid;
97: return &Apache::lonnet::put('nohist_'.$hash_name,
98: { $id => {
99: 'exe_uname' => $env{'user.name'},
100: 'exe_udom' => $env{'user.domain'},
101: 'exe_time' => time(),
102: 'exe_ip' => $ENV{'REMOTE_ADDR'},
103: 'delflag' => $delflag,
104: 'logentry' => $storehash,
105: 'uname' => $uname,
106: 'udom' => $udom,
107: }
108: },
109: $env{'course.'.$env{'request.course.id'}.'.domain'},
110: $env{'course.'.$env{'request.course.id'}.'.num'}
111: );
112: }
113: }
114:
115: sub logtouch {
116: my $execdir=$perlvar{'lonDaemons'};
117: unless (-e "$execdir/logs/lonnet.log") {
118: open(my $fh,">>$execdir/logs/lonnet.log");
119: close $fh;
120: }
121: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
122: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
123: }
124:
125: sub logthis {
126: my $message=shift;
127: my $execdir=$perlvar{'lonDaemons'};
128: my $now=time;
129: my $local=localtime($now);
130: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
131: print $fh "$local ($$): $message\n";
132: close($fh);
133: }
134: return 1;
135: }
136:
137: sub logperm {
138: my $message=shift;
139: my $execdir=$perlvar{'lonDaemons'};
140: my $now=time;
141: my $local=localtime($now);
142: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
143: print $fh "$now:$message:$local\n";
144: close($fh);
145: }
146: return 1;
147: }
148:
149: # -------------------------------------------------- Non-critical communication
150: sub subreply {
151: my ($cmd,$server)=@_;
152: my $peerfile="$perlvar{'lonSockDir'}/".$hostname{$server};
153: #
154: # With loncnew process trimming, there's a timing hole between lonc server
155: # process exit and the master server picking up the listen on the AF_UNIX
156: # socket. In that time interval, a lock file will exist:
157:
158: my $lockfile=$peerfile.".lock";
159: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
160: sleep(1);
161: }
162: # At this point, either a loncnew parent is listening or an old lonc
163: # or loncnew child is listening so we can connect or everything's dead.
164: #
165: # We'll give the connection a few tries before abandoning it. If
166: # connection is not possible, we'll con_lost back to the client.
167: #
168: my $client;
169: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
170: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
171: Type => SOCK_STREAM,
172: Timeout => 10);
173: if($client) {
174: last; # Connected!
175: }
176: sleep(1); # Try again later if failed connection.
177: }
178: my $answer;
179: if ($client) {
180: print $client "sethost:$server:$cmd\n";
181: $answer=<$client>;
182: if (!$answer) { $answer="con_lost"; }
183: chomp($answer);
184: } else {
185: $answer = 'con_lost'; # Failed connection.
186: }
187: return $answer;
188: }
189:
190: sub reply {
191: my ($cmd,$server)=@_;
192: unless (defined($hostname{$server})) { return 'no_such_host'; }
193: my $answer=subreply($cmd,$server);
194: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
195: &logthis("<font color=\"blue\">WARNING:".
196: " $cmd to $server returned $answer</font>");
197: }
198: return $answer;
199: }
200:
201: # ----------------------------------------------------------- Send USR1 to lonc
202:
203: sub reconlonc {
204: my $peerfile=shift;
205: &logthis("Trying to reconnect for $peerfile");
206: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
207: if (open(my $fh,"<$loncfile")) {
208: my $loncpid=<$fh>;
209: chomp($loncpid);
210: if (kill 0 => $loncpid) {
211: &logthis("lonc at pid $loncpid responding, sending USR1");
212: kill USR1 => $loncpid;
213: sleep 1;
214: if (-e "$peerfile") { return; }
215: &logthis("$peerfile still not there, give it another try");
216: sleep 5;
217: if (-e "$peerfile") { return; }
218: &logthis(
219: "<font color=\"blue\">WARNING: $peerfile still not there, giving up</font>");
220: } else {
221: &logthis(
222: "<font color=\"blue\">WARNING:".
223: " lonc at pid $loncpid not responding, giving up</font>");
224: }
225: } else {
226: &logthis('<font color="blue">WARNING: lonc not running, giving up</font>');
227: }
228: }
229:
230: # ------------------------------------------------------ Critical communication
231:
232: sub critical {
233: my ($cmd,$server)=@_;
234: unless ($hostname{$server}) {
235: &logthis("<font color=\"blue\">WARNING:".
236: " Critical message to unknown server ($server)</font>");
237: return 'no_such_host';
238: }
239: my $answer=reply($cmd,$server);
240: if ($answer eq 'con_lost') {
241: &reconlonc("$perlvar{'lonSockDir'}/$server");
242: my $answer=reply($cmd,$server);
243: if ($answer eq 'con_lost') {
244: my $now=time;
245: my $middlename=$cmd;
246: $middlename=substr($middlename,0,16);
247: $middlename=~s/\W//g;
248: my $dfilename=
249: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
250: $dumpcount++;
251: {
252: my $dfh;
253: if (open($dfh,">$dfilename")) {
254: print $dfh "$cmd\n";
255: close($dfh);
256: }
257: }
258: sleep 2;
259: my $wcmd='';
260: {
261: my $dfh;
262: if (open($dfh,"<$dfilename")) {
263: $wcmd=<$dfh>;
264: close($dfh);
265: }
266: }
267: chomp($wcmd);
268: if ($wcmd eq $cmd) {
269: &logthis("<font color=\"blue\">WARNING: ".
270: "Connection buffer $dfilename: $cmd</font>");
271: &logperm("D:$server:$cmd");
272: return 'con_delayed';
273: } else {
274: &logthis("<font color=\"red\">CRITICAL:"
275: ." Critical connection failed: $server $cmd</font>");
276: &logperm("F:$server:$cmd");
277: return 'con_failed';
278: }
279: }
280: }
281: return $answer;
282: }
283:
284: # ------------------------------------------- check if return value is an error
285:
286: sub error {
287: my ($result) = @_;
288: if ($result =~ /^(con_lost|no_such_host|error: (\d+) (.*))/) {
289: if ($2 == 2) { return undef; }
290: return $1;
291: }
292: return undef;
293: }
294:
295: sub convert_and_load_session_env {
296: my ($lonidsdir,$handle)=@_;
297: my @profile;
298: {
299: open(my $idf,"$lonidsdir/$handle.id");
300: flock($idf,LOCK_SH);
301: @profile=<$idf>;
302: close($idf);
303: }
304: my %temp_env;
305: foreach my $line (@profile) {
306: if ($line !~ m/=/) {
307: return 0;
308: }
309: chomp($line);
310: my ($envname,$envvalue)=split(/=/,$line,2);
311: $temp_env{&unescape($envname)} = &unescape($envvalue);
312: }
313: unlink("$lonidsdir/$handle.id");
314: if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",&GDBM_WRCREAT(),
315: 0640)) {
316: %disk_env = %temp_env;
317: @env{keys(%temp_env)} = @disk_env{keys(%temp_env)};
318: untie(%disk_env);
319: }
320: return 1;
321: }
322:
323: # ------------------------------------------- Transfer profile into environment
324: my $env_loaded;
325: sub transfer_profile_to_env {
326: my ($lonidsdir,$handle,$force_transfer) = @_;
327: if (!$force_transfer && $env_loaded) { return; }
328:
329: if (!defined($lonidsdir)) {
330: $lonidsdir = $perlvar{'lonIDsDir'};
331: }
332: if (!defined($handle)) {
333: ($handle) = ($env{'user.environment'} =~m|/([^/]+)\.id$| );
334: }
335:
336: my $convert;
337: {
338: open(my $idf,"$lonidsdir/$handle.id");
339: flock($idf,LOCK_SH);
340: if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",
341: &GDBM_READER(),0640)) {
342: @env{keys(%disk_env)} = @disk_env{keys(%disk_env)};
343: untie(%disk_env);
344: } else {
345: $convert = 1;
346: }
347: }
348: if ($convert) {
349: if (!&convert_and_load_session_env($lonidsdir,$handle)) {
350: &logthis("Failed to load session, or convert session.");
351: }
352: }
353:
354: my %remove;
355: while ( my $envname = each(%env) ) {
356: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
357: if ($time < time-300) {
358: $remove{$key}++;
359: }
360: }
361: }
362:
363: $env{'user.environment'} = "$lonidsdir/$handle.id";
364: $env_loaded=1;
365: foreach my $expired_key (keys(%remove)) {
366: &delenv($expired_key);
367: }
368: }
369:
370: sub timed_flock {
371: my ($file,$lock_type) = @_;
372: my $failed=0;
373: eval {
374: local $SIG{__DIE__}='DEFAULT';
375: local $SIG{ALRM}=sub {
376: $failed=1;
377: die("failed lock");
378: };
379: alarm(13);
380: flock($file,$lock_type);
381: alarm(0);
382: };
383: if ($failed) {
384: return undef;
385: } else {
386: return 1;
387: }
388: }
389:
390: # ---------------------------------------------------------- Append Environment
391:
392: sub appenv {
393: my %newenv=@_;
394: foreach my $key (keys(%newenv)) {
395: if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
396: &logthis("<font color=\"blue\">WARNING: ".
397: "Attempt to modify environment ".$key." to ".$newenv{$key}
398: .'</font>');
399: delete($newenv{$key});
400: } else {
401: $env{$key}=$newenv{$key};
402: }
403: }
404: open(my $env_file,$env{'user.environment'});
405: if (&timed_flock($env_file,LOCK_EX)
406: &&
407: tie(my %disk_env,'GDBM_File',$env{'user.environment'},
408: (&GDBM_WRITER()|&GDBM_NOLOCK()),0640)) {
409: while (my ($key,$value) = each(%newenv)) {
410: $disk_env{$key} = $value;
411: }
412: untie(%disk_env);
413: }
414: return 'ok';
415: }
416: # ----------------------------------------------------- Delete from Environment
417:
418: sub delenv {
419: my $delthis=shift;
420: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
421: &logthis("<font color=\"blue\">WARNING: ".
422: "Attempt to delete from environment ".$delthis);
423: return 'error';
424: }
425: open(my $env_file,$env{'user.environment'});
426: if (&timed_flock($env_file,LOCK_EX)
427: &&
428: tie(my %disk_env,'GDBM_File',$env{'user.environment'},
429: (&GDBM_WRITER()|&GDBM_NOLOCK()),0640)) {
430: foreach my $key (keys(%disk_env)) {
431: if ($key=~/^$delthis/) {
432: delete($env{$key});
433: delete($disk_env{$key});
434: }
435: }
436: untie(%disk_env);
437: }
438: return 'ok';
439: }
440:
441: sub get_env_multiple {
442: my ($name) = @_;
443: my @values;
444: if (defined($env{$name})) {
445: # exists is it an array
446: if (ref($env{$name})) {
447: @values=@{ $env{$name} };
448: } else {
449: $values[0]=$env{$name};
450: }
451: }
452: return(@values);
453: }
454:
455: # ------------------------------------------ Find out current server userload
456: # there is a copy in lond
457: sub userload {
458: my $numusers=0;
459: {
460: opendir(LONIDS,$perlvar{'lonIDsDir'});
461: my $filename;
462: my $curtime=time;
463: while ($filename=readdir(LONIDS)) {
464: if ($filename eq '.' || $filename eq '..') {next;}
465: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
466: if ($curtime-$mtime < 1800) { $numusers++; }
467: }
468: closedir(LONIDS);
469: }
470: my $userloadpercent=0;
471: my $maxuserload=$perlvar{'lonUserLoadLim'};
472: if ($maxuserload) {
473: $userloadpercent=100*$numusers/$maxuserload;
474: }
475: $userloadpercent=sprintf("%.2f",$userloadpercent);
476: return $userloadpercent;
477: }
478:
479: # ------------------------------------------ Fight off request when overloaded
480:
481: sub overloaderror {
482: my ($r,$checkserver)=@_;
483: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
484: my $loadavg;
485: if ($checkserver eq $perlvar{'lonHostID'}) {
486: open(my $loadfile,'/proc/loadavg');
487: $loadavg=<$loadfile>;
488: $loadavg =~ s/\s.*//g;
489: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
490: close($loadfile);
491: } else {
492: $loadavg=&reply('load',$checkserver);
493: }
494: my $overload=$loadavg-100;
495: if ($overload>0) {
496: $r->err_headers_out->{'Retry-After'}=$overload;
497: $r->log_error('Overload of '.$overload.' on '.$checkserver);
498: return 413;
499: }
500: return '';
501: }
502:
503: # ------------------------------ Find server with least workload from spare.tab
504:
505: sub spareserver {
506: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
507: my $spare_server;
508: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
509: my $lowest_load=($loadpercent > $userloadpercent) ? $loadpercent
510: : $userloadpercent;
511:
512: foreach my $try_server (@{ $spareid{'primary'} }) {
513: ($spare_server, $lowest_load) =
514: &compare_server_load($try_server, $spare_server, $lowest_load);
515: }
516:
517: my $found_server = ($spare_server ne '' && $lowest_load < 100);
518:
519: if (!$found_server) {
520: foreach my $try_server (@{ $spareid{'default'} }) {
521: ($spare_server, $lowest_load) =
522: &compare_server_load($try_server, $spare_server, $lowest_load);
523: }
524: }
525:
526: if (!$want_server_name) {
527: $spare_server="http://$hostname{$spare_server}";
528: }
529: return $spare_server;
530: }
531:
532: sub compare_server_load {
533: my ($try_server, $spare_server, $lowest_load) = @_;
534:
535: my $loadans = &reply('load', $try_server);
536: my $userloadans = &reply('userload',$try_server);
537:
538: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
539: next; #didn't get a number from the server
540: }
541:
542: my $load;
543: if ($loadans =~ /\d/) {
544: if ($userloadans =~ /\d/) {
545: #both are numbers, pick the bigger one
546: $load = ($loadans > $userloadans) ? $loadans
547: : $userloadans;
548: } else {
549: $load = $loadans;
550: }
551: } else {
552: $load = $userloadans;
553: }
554:
555: if (($load =~ /\d/) && ($load < $lowest_load)) {
556: $spare_server = $try_server;
557: $lowest_load = $load;
558: }
559: return ($spare_server,$lowest_load);
560: }
561: # --------------------------------------------- Try to change a user's password
562:
563: sub changepass {
564: my ($uname,$udom,$currentpass,$newpass,$server,$context)=@_;
565: $currentpass = &escape($currentpass);
566: $newpass = &escape($newpass);
567: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass:$context",
568: $server);
569: if (! $answer) {
570: &logthis("No reply on password change request to $server ".
571: "by $uname in domain $udom.");
572: } elsif ($answer =~ "^ok") {
573: &logthis("$uname in $udom successfully changed their password ".
574: "on $server.");
575: } elsif ($answer =~ "^pwchange_failure") {
576: &logthis("$uname in $udom was unable to change their password ".
577: "on $server. The action was blocked by either lcpasswd ".
578: "or pwchange");
579: } elsif ($answer =~ "^non_authorized") {
580: &logthis("$uname in $udom did not get their password correct when ".
581: "attempting to change it on $server.");
582: } elsif ($answer =~ "^auth_mode_error") {
583: &logthis("$uname in $udom attempted to change their password despite ".
584: "not being locally or internally authenticated on $server.");
585: } elsif ($answer =~ "^unknown_user") {
586: &logthis("$uname in $udom attempted to change their password ".
587: "on $server but were unable to because $server is not ".
588: "their home server.");
589: } elsif ($answer =~ "^refused") {
590: &logthis("$server refused to change $uname in $udom password because ".
591: "it was sent an unencrypted request to change the password.");
592: }
593: return $answer;
594: }
595:
596: # ----------------------- Try to determine user's current authentication scheme
597:
598: sub queryauthenticate {
599: my ($uname,$udom)=@_;
600: my $uhome=&homeserver($uname,$udom);
601: if (!$uhome) {
602: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
603: return 'no_host';
604: }
605: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
606: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
607: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
608: }
609: return $answer;
610: }
611:
612: # --------- Try to authenticate user from domain's lib servers (first this one)
613:
614: sub authenticate {
615: my ($uname,$upass,$udom)=@_;
616: $upass=&escape($upass);
617: $uname= &LONCAPA::clean_username($uname);
618: my $uhome=&homeserver($uname,$udom);
619: if (!$uhome) {
620: &logthis("User $uname at $udom is unknown in authenticate");
621: return 'no_host';
622: }
623: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
624: if ($answer eq 'authorized') {
625: &logthis("User $uname at $udom authorized by $uhome");
626: return $uhome;
627: }
628: if ($answer eq 'non_authorized') {
629: &logthis("User $uname at $udom rejected by $uhome");
630: return 'no_host';
631: }
632: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
633: return 'no_host';
634: }
635:
636: # ---------------------- Find the homebase for a user from domain's lib servers
637:
638: my %homecache;
639: sub homeserver {
640: my ($uname,$udom,$ignoreBadCache)=@_;
641: my $index="$uname:$udom";
642:
643: if (exists($homecache{$index})) { return $homecache{$index}; }
644: my $tryserver;
645: foreach $tryserver (keys %libserv) {
646: next if ($ignoreBadCache ne 'true' &&
647: exists($badServerCache{$tryserver}));
648: if ($hostdom{$tryserver} eq $udom) {
649: my $answer=reply("home:$udom:$uname",$tryserver);
650: if ($answer eq 'found') {
651: return $homecache{$index}=$tryserver;
652: } elsif ($answer eq 'no_host') {
653: $badServerCache{$tryserver}=1;
654: }
655: }
656: }
657: return 'no_host';
658: }
659:
660: # ------------------------------------- Find the usernames behind a list of IDs
661:
662: sub idget {
663: my ($udom,@ids)=@_;
664: my %returnhash=();
665:
666: my $tryserver;
667: foreach $tryserver (keys %libserv) {
668: if ($hostdom{$tryserver} eq $udom) {
669: my $idlist=join('&',@ids);
670: $idlist=~tr/A-Z/a-z/;
671: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
672: my @answer=();
673: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
674: @answer=split(/\&/,$reply);
675: } ;
676: my $i;
677: for ($i=0;$i<=$#ids;$i++) {
678: if ($answer[$i]) {
679: $returnhash{$ids[$i]}=$answer[$i];
680: }
681: }
682: }
683: }
684: return %returnhash;
685: }
686:
687: # ------------------------------------- Find the IDs behind a list of usernames
688:
689: sub idrget {
690: my ($udom,@unames)=@_;
691: my %returnhash=();
692: foreach my $uname (@unames) {
693: $returnhash{$uname}=(&userenvironment($udom,$uname,'id'))[1];
694: }
695: return %returnhash;
696: }
697:
698: # ------------------------------- Store away a list of names and associated IDs
699:
700: sub idput {
701: my ($udom,%ids)=@_;
702: my %servers=();
703: foreach my $uname (keys(%ids)) {
704: &cput('environment',{'id'=>$ids{$uname}},$udom,$uname);
705: my $uhom=&homeserver($uname,$udom);
706: if ($uhom ne 'no_host') {
707: my $id=&escape($ids{$uname});
708: $id=~tr/A-Z/a-z/;
709: my $esc_unam=&escape($uname);
710: if ($servers{$uhom}) {
711: $servers{$uhom}.='&'.$id.'='.$esc_unam;
712: } else {
713: $servers{$uhom}=$id.'='.$esc_unam;
714: }
715: }
716: }
717: foreach my $server (keys(%servers)) {
718: &critical('idput:'.$udom.':'.$servers{$server},$server);
719: }
720: }
721:
722: # ------------------------------------------- get items from domain db files
723:
724: sub get_dom {
725: my ($namespace,$storearr,$udom)=@_;
726: my $items='';
727: foreach my $item (@$storearr) {
728: $items.=&escape($item).'&';
729: }
730: $items=~s/\&$//;
731: if (!$udom) { $udom=$env{'user.domain'}; }
732: if (exists($domain_primary{$udom})) {
733: my $uhome=$domain_primary{$udom};
734: my $rep=&reply("getdom:$udom:$namespace:$items",$uhome);
735: my @pairs=split(/\&/,$rep);
736: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
737: return @pairs;
738: }
739: my %returnhash=();
740: my $i=0;
741: foreach my $item (@$storearr) {
742: $returnhash{$item}=&thaw_unescape($pairs[$i]);
743: $i++;
744: }
745: return %returnhash;
746: } else {
747: &logthis("get_dom failed - no primary domain server for $udom");
748: }
749: }
750:
751: # -------------------------------------------- put items in domain db files
752:
753: sub put_dom {
754: my ($namespace,$storehash,$udom)=@_;
755: if (!$udom) { $udom=$env{'user.domain'}; }
756: if (exists($domain_primary{$udom})) {
757: my $uhome=$domain_primary{$udom};
758: my $items='';
759: foreach my $item (keys(%$storehash)) {
760: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
761: }
762: $items=~s/\&$//;
763: return &reply("putdom:$udom:$namespace:$items",$uhome);
764: } else {
765: &logthis("put_dom failed - no primary domain server for $udom");
766: }
767: }
768:
769: # --------------------------------------------------- Assign a key to a student
770:
771: sub assign_access_key {
772: #
773: # a valid key looks like uname:udom#comments
774: # comments are being appended
775: #
776: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
777: $kdom=
778: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
779: $knum=
780: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
781: $cdom=
782: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
783: $cnum=
784: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
785: $udom=$env{'user.name'} unless (defined($udom));
786: $uname=$env{'user.domain'} unless (defined($uname));
787: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
788: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
789: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
790: # assigned to this person
791: # - this should not happen,
792: # unless something went wrong
793: # the first time around
794: # ready to assign
795: $logentry=$1.'; '.$logentry;
796: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
797: $kdom,$knum) eq 'ok') {
798: # key now belongs to user
799: my $envkey='key.'.$cdom.'_'.$cnum;
800: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
801: &appenv('environment.'.$envkey => $ckey);
802: return 'ok';
803: } else {
804: return
805: 'error: Count not permanently assign key, will need to be re-entered later.';
806: }
807: } else {
808: return 'error: Could not assign key, try again later.';
809: }
810: } elsif (!$existing{$ckey}) {
811: # the key does not exist
812: return 'error: The key does not exist';
813: } else {
814: # the key is somebody else's
815: return 'error: The key is already in use';
816: }
817: }
818:
819: # ------------------------------------------ put an additional comment on a key
820:
821: sub comment_access_key {
822: #
823: # a valid key looks like uname:udom#comments
824: # comments are being appended
825: #
826: my ($ckey,$cdom,$cnum,$logentry)=@_;
827: $cdom=
828: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
829: $cnum=
830: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
831: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
832: if ($existing{$ckey}) {
833: $existing{$ckey}.='; '.$logentry;
834: # ready to assign
835: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
836: $cdom,$cnum) eq 'ok') {
837: return 'ok';
838: } else {
839: return 'error: Count not store comment.';
840: }
841: } else {
842: # the key does not exist
843: return 'error: The key does not exist';
844: }
845: }
846:
847: # ------------------------------------------------------ Generate a set of keys
848:
849: sub generate_access_keys {
850: my ($number,$cdom,$cnum,$logentry)=@_;
851: $cdom=
852: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
853: $cnum=
854: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
855: unless (&allowed('mky',$cdom)) { return 0; }
856: unless (($cdom) && ($cnum)) { return 0; }
857: if ($number>10000) { return 0; }
858: sleep(2); # make sure don't get same seed twice
859: srand(time()^($$+($$<<15))); # from "Programming Perl"
860: my $total=0;
861: for (my $i=1;$i<=$number;$i++) {
862: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
863: sprintf("%lx",int(100000*rand)).'-'.
864: sprintf("%lx",int(100000*rand));
865: $newkey=~s/1/g/g; # folks mix up 1 and l
866: $newkey=~s/0/h/g; # and also 0 and O
867: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
868: if ($existing{$newkey}) {
869: $i--;
870: } else {
871: if (&put('accesskeys',
872: { $newkey => '# generated '.localtime().
873: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
874: '; '.$logentry },
875: $cdom,$cnum) eq 'ok') {
876: $total++;
877: }
878: }
879: }
880: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
881: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
882: return $total;
883: }
884:
885: # ------------------------------------------------------- Validate an accesskey
886:
887: sub validate_access_key {
888: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
889: $cdom=
890: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
891: $cnum=
892: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
893: $udom=$env{'user.domain'} unless (defined($udom));
894: $uname=$env{'user.name'} unless (defined($uname));
895: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
896: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
897: }
898:
899: # ------------------------------------- Find the section of student in a course
900: sub devalidate_getsection_cache {
901: my ($udom,$unam,$courseid)=@_;
902: my $hashid="$udom:$unam:$courseid";
903: &devalidate_cache_new('getsection',$hashid);
904: }
905:
906: sub courseid_to_courseurl {
907: my ($courseid) = @_;
908: #already url style courseid
909: return $courseid if ($courseid =~ m{^/});
910:
911: if (exists($env{'course.'.$courseid.'.num'})) {
912: my $cnum = $env{'course.'.$courseid.'.num'};
913: my $cdom = $env{'course.'.$courseid.'.domain'};
914: return "/$cdom/$cnum";
915: }
916:
917: my %courseinfo=&Apache::lonnet::coursedescription($courseid);
918: if (exists($courseinfo{'num'})) {
919: return "/$courseinfo{'domain'}/$courseinfo{'num'}";
920: }
921:
922: return undef;
923: }
924:
925: sub getsection {
926: my ($udom,$unam,$courseid)=@_;
927: my $cachetime=1800;
928:
929: my $hashid="$udom:$unam:$courseid";
930: my ($result,$cached)=&is_cached_new('getsection',$hashid);
931: if (defined($cached)) { return $result; }
932:
933: my %Pending;
934: my %Expired;
935: #
936: # Each role can either have not started yet (pending), be active,
937: # or have expired.
938: #
939: # If there is an active role, we are done.
940: #
941: # If there is more than one role which has not started yet,
942: # choose the one which will start sooner
943: # If there is one role which has not started yet, return it.
944: #
945: # If there is more than one expired role, choose the one which ended last.
946: # If there is a role which has expired, return it.
947: #
948: $courseid = &courseid_to_courseurl($courseid);
949: my %roleshash = &dump('roles',$udom,$unam,$courseid);
950: foreach my $key (keys(%roleshash)) {
951: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
952: my $section=$1;
953: if ($key eq $courseid.'_st') { $section=''; }
954: my ($dummy,$end,$start)=split(/\_/,&unescape($roleshash{$key}));
955: my $now=time;
956: if (defined($end) && $end && ($now > $end)) {
957: $Expired{$end}=$section;
958: next;
959: }
960: if (defined($start) && $start && ($now < $start)) {
961: $Pending{$start}=$section;
962: next;
963: }
964: return &do_cache_new('getsection',$hashid,$section,$cachetime);
965: }
966: #
967: # Presumedly there will be few matching roles from the above
968: # loop and the sorting time will be negligible.
969: if (scalar(keys(%Pending))) {
970: my ($time) = sort {$a <=> $b} keys(%Pending);
971: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
972: }
973: if (scalar(keys(%Expired))) {
974: my @sorted = sort {$a <=> $b} keys(%Expired);
975: my $time = pop(@sorted);
976: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
977: }
978: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
979: }
980:
981: sub save_cache {
982: &purge_remembered();
983: #&Apache::loncommon::validate_page();
984: undef(%env);
985: undef($env_loaded);
986: }
987:
988: my $to_remember=-1;
989: my %remembered;
990: my %accessed;
991: my $kicks=0;
992: my $hits=0;
993: sub devalidate_cache_new {
994: my ($name,$id,$debug) = @_;
995: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
996: $id=&escape($name.':'.$id);
997: $memcache->delete($id);
998: delete($remembered{$id});
999: delete($accessed{$id});
1000: }
1001:
1002: sub is_cached_new {
1003: my ($name,$id,$debug) = @_;
1004: $id=&escape($name.':'.$id);
1005: if (exists($remembered{$id})) {
1006: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
1007: $accessed{$id}=[&gettimeofday()];
1008: $hits++;
1009: return ($remembered{$id},1);
1010: }
1011: my $value = $memcache->get($id);
1012: if (!(defined($value))) {
1013: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
1014: return (undef,undef);
1015: }
1016: if ($value eq '__undef__') {
1017: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
1018: $value=undef;
1019: }
1020: &make_room($id,$value,$debug);
1021: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
1022: return ($value,1);
1023: }
1024:
1025: sub do_cache_new {
1026: my ($name,$id,$value,$time,$debug) = @_;
1027: $id=&escape($name.':'.$id);
1028: my $setvalue=$value;
1029: if (!defined($setvalue)) {
1030: $setvalue='__undef__';
1031: }
1032: if (!defined($time) ) {
1033: $time=600;
1034: }
1035: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
1036: $memcache->set($id,$setvalue,$time);
1037: # need to make a copy of $value
1038: #&make_room($id,$value,$debug);
1039: return $value;
1040: }
1041:
1042: sub make_room {
1043: my ($id,$value,$debug)=@_;
1044: $remembered{$id}=$value;
1045: if ($to_remember<0) { return; }
1046: $accessed{$id}=[&gettimeofday()];
1047: if (scalar(keys(%remembered)) <= $to_remember) { return; }
1048: my $to_kick;
1049: my $max_time=0;
1050: foreach my $other (keys(%accessed)) {
1051: if (&tv_interval($accessed{$other}) > $max_time) {
1052: $to_kick=$other;
1053: $max_time=&tv_interval($accessed{$other});
1054: }
1055: }
1056: delete($remembered{$to_kick});
1057: delete($accessed{$to_kick});
1058: $kicks++;
1059: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
1060: return;
1061: }
1062:
1063: sub purge_remembered {
1064: #&logthis("Tossing ".scalar(keys(%remembered)));
1065: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
1066: undef(%remembered);
1067: undef(%accessed);
1068: }
1069: # ------------------------------------- Read an entry from a user's environment
1070:
1071: sub userenvironment {
1072: my ($udom,$unam,@what)=@_;
1073: my %returnhash=();
1074: my @answer=split(/\&/,
1075: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1076: &homeserver($unam,$udom)));
1077: my $i;
1078: for ($i=0;$i<=$#what;$i++) {
1079: $returnhash{$what[$i]}=&unescape($answer[$i]);
1080: }
1081: return %returnhash;
1082: }
1083:
1084: # ---------------------------------------------------------- Get a studentphoto
1085: sub studentphoto {
1086: my ($udom,$unam,$ext) = @_;
1087: my $home=&Apache::lonnet::homeserver($unam,$udom);
1088: if (defined($env{'request.course.id'})) {
1089: if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
1090: if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
1091: return(&retrievestudentphoto($udom,$unam,$ext));
1092: } else {
1093: my ($result,$perm_reqd)=
1094: &Apache::lonnet::auto_photo_permission($unam,$udom);
1095: if ($result eq 'ok') {
1096: if (!($perm_reqd eq 'yes')) {
1097: return(&retrievestudentphoto($udom,$unam,$ext));
1098: }
1099: }
1100: }
1101: }
1102: } else {
1103: my ($result,$perm_reqd) =
1104: &Apache::lonnet::auto_photo_permission($unam,$udom);
1105: if ($result eq 'ok') {
1106: if (!($perm_reqd eq 'yes')) {
1107: return(&retrievestudentphoto($udom,$unam,$ext));
1108: }
1109: }
1110: }
1111: return '/adm/lonKaputt/lonlogo_broken.gif';
1112: }
1113:
1114: sub retrievestudentphoto {
1115: my ($udom,$unam,$ext,$type) = @_;
1116: my $home=&Apache::lonnet::homeserver($unam,$udom);
1117: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
1118: if ($ret eq 'ok') {
1119: my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
1120: if ($type eq 'thumbnail') {
1121: $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
1122: }
1123: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
1124: return $tokenurl;
1125: } else {
1126: if ($type eq 'thumbnail') {
1127: return '/adm/lonKaputt/genericstudent_tn.gif';
1128: } else {
1129: return '/adm/lonKaputt/lonlogo_broken.gif';
1130: }
1131: }
1132: }
1133:
1134: # -------------------------------------------------------------------- New chat
1135:
1136: sub chatsend {
1137: my ($newentry,$anon,$group)=@_;
1138: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1139: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1140: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1141: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1142: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
1143: &escape($newentry)).':'.$group,$chome);
1144: }
1145:
1146: # ------------------------------------------ Find current version of a resource
1147:
1148: sub getversion {
1149: my $fname=&clutter(shift);
1150: unless ($fname=~/^\/res\//) { return -1; }
1151: return ¤tversion(&filelocation('',$fname));
1152: }
1153:
1154: sub currentversion {
1155: my $fname=shift;
1156: my ($result,$cached)=&is_cached_new('resversion',$fname);
1157: if (defined($cached)) { return $result; }
1158: my $author=$fname;
1159: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1160: my ($udom,$uname)=split(/\//,$author);
1161: my $home=homeserver($uname,$udom);
1162: if ($home eq 'no_host') {
1163: return -1;
1164: }
1165: my $answer=reply("currentversion:$fname",$home);
1166: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1167: return -1;
1168: }
1169: return &do_cache_new('resversion',$fname,$answer,600);
1170: }
1171:
1172: # ----------------------------- Subscribe to a resource, return URL if possible
1173:
1174: sub subscribe {
1175: my $fname=shift;
1176: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1177: $fname=~s/[\n\r]//g;
1178: my $author=$fname;
1179: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1180: my ($udom,$uname)=split(/\//,$author);
1181: my $home=homeserver($uname,$udom);
1182: if ($home eq 'no_host') {
1183: return 'not_found';
1184: }
1185: my $answer=reply("sub:$fname",$home);
1186: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1187: $answer.=' by '.$home;
1188: }
1189: return $answer;
1190: }
1191:
1192: # -------------------------------------------------------------- Replicate file
1193:
1194: sub repcopy {
1195: my $filename=shift;
1196: $filename=~s/\/+/\//g;
1197: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1198: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1199: if ($filename=~m|^/home/httpd/html/userfiles/| or
1200: $filename=~m -^/*(uploaded|editupload)/-) {
1201: return &repcopy_userfile($filename);
1202: }
1203: $filename=~s/[\n\r]//g;
1204: my $transname="$filename.in.transfer";
1205: # FIXME: this should flock
1206: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1207: my $remoteurl=subscribe($filename);
1208: if ($remoteurl =~ /^con_lost by/) {
1209: &logthis("Subscribe returned $remoteurl: $filename");
1210: return 'unavailable';
1211: } elsif ($remoteurl eq 'not_found') {
1212: #&logthis("Subscribe returned not_found: $filename");
1213: return 'not_found';
1214: } elsif ($remoteurl =~ /^rejected by/) {
1215: &logthis("Subscribe returned $remoteurl: $filename");
1216: return 'forbidden';
1217: } elsif ($remoteurl eq 'directory') {
1218: return 'ok';
1219: } else {
1220: my $author=$filename;
1221: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1222: my ($udom,$uname)=split(/\//,$author);
1223: my $home=homeserver($uname,$udom);
1224: unless ($home eq $perlvar{'lonHostID'}) {
1225: my @parts=split(/\//,$filename);
1226: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1227: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1228: &logthis("Malconfiguration for replication: $filename");
1229: return 'bad_request';
1230: }
1231: my $count;
1232: for ($count=5;$count<$#parts;$count++) {
1233: $path.="/$parts[$count]";
1234: if ((-e $path)!=1) {
1235: mkdir($path,0777);
1236: }
1237: }
1238: my $ua=new LWP::UserAgent;
1239: my $request=new HTTP::Request('GET',"$remoteurl");
1240: my $response=$ua->request($request,$transname);
1241: if ($response->is_error()) {
1242: unlink($transname);
1243: my $message=$response->status_line;
1244: &logthis("<font color=\"blue\">WARNING:"
1245: ." LWP get: $message: $filename</font>");
1246: return 'unavailable';
1247: } else {
1248: if ($remoteurl!~/\.meta$/) {
1249: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1250: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1251: if ($mresponse->is_error()) {
1252: unlink($filename.'.meta');
1253: &logthis(
1254: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1255: }
1256: }
1257: rename($transname,$filename);
1258: return 'ok';
1259: }
1260: }
1261: }
1262: }
1263:
1264: # ------------------------------------------------ Get server side include body
1265: sub ssi_body {
1266: my ($filelink,%form)=@_;
1267: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1268: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1269: }
1270: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1271: &ssi($filelink,%form));
1272: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
1273: $output=~s/^.*?\<body[^\>]*\>//si;
1274: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1275: return $output;
1276: }
1277:
1278: # --------------------------------------------------------- Server Side Include
1279:
1280: sub absolute_url {
1281: my ($host_name) = @_;
1282: my $protocol = ($ENV{'SERVER_PORT'} == 443?'https://':'http://');
1283: if ($host_name eq '') {
1284: $host_name = $ENV{'SERVER_NAME'};
1285: }
1286: return $protocol.$host_name;
1287: }
1288:
1289: sub ssi {
1290:
1291: my ($fn,%form)=@_;
1292:
1293: my $ua=new LWP::UserAgent;
1294:
1295: my $request;
1296:
1297: $form{'no_update_last_known'}=1;
1298:
1299: if (%form) {
1300: $request=new HTTP::Request('POST',&absolute_url().$fn);
1301: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1302: } else {
1303: $request=new HTTP::Request('GET',&absolute_url().$fn);
1304: }
1305:
1306: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1307: my $response=$ua->request($request);
1308:
1309: return $response->content;
1310: }
1311:
1312: sub externalssi {
1313: my ($url)=@_;
1314: my $ua=new LWP::UserAgent;
1315: my $request=new HTTP::Request('GET',$url);
1316: my $response=$ua->request($request);
1317: return $response->content;
1318: }
1319:
1320: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1321:
1322: sub allowuploaded {
1323: my ($srcurl,$url)=@_;
1324: $url=&clutter(&declutter($url));
1325: my $dir=$url;
1326: $dir=~s/\/[^\/]+$//;
1327: my %httpref=();
1328: my $httpurl=&hreflocation('',$url);
1329: $httpref{'httpref.'.$httpurl}=$srcurl;
1330: &Apache::lonnet::appenv(%httpref);
1331: }
1332:
1333: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1334: # input: action, courseID, current domain, intended
1335: # path to file, source of file, instruction to parse file for objects,
1336: # ref to hash for embedded objects,
1337: # ref to hash for codebase of java objects.
1338: #
1339: # output: url to file (if action was uploaddoc),
1340: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1341: #
1342: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1343: # course.
1344: #
1345: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1346: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1347: # course's home server.
1348: #
1349: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1350: # be copied from $source (current location) to
1351: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1352: # and will then be copied to
1353: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1354: # course's home server.
1355: #
1356: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1357: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1358: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1359: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1360: # in course's home server.
1361: #
1362:
1363: sub process_coursefile {
1364: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1365: my $fetchresult;
1366: my $home=&homeserver($docuname,$docudom);
1367: if ($action eq 'propagate') {
1368: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1369: $home);
1370: } else {
1371: my $fpath = '';
1372: my $fname = $file;
1373: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1374: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1375: my $filepath = &build_filepath($fpath);
1376: if ($action eq 'copy') {
1377: if ($source eq '') {
1378: $fetchresult = 'no source file';
1379: return $fetchresult;
1380: } else {
1381: my $destination = $filepath.'/'.$fname;
1382: rename($source,$destination);
1383: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1384: $home);
1385: }
1386: } elsif ($action eq 'uploaddoc') {
1387: open(my $fh,'>'.$filepath.'/'.$fname);
1388: print $fh $env{'form.'.$source};
1389: close($fh);
1390: if ($parser eq 'parse') {
1391: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1392: unless ($parse_result eq 'ok') {
1393: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1394: }
1395: }
1396: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1397: $home);
1398: if ($fetchresult eq 'ok') {
1399: return '/uploaded/'.$fpath.'/'.$fname;
1400: } else {
1401: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1402: ' to host '.$home.': '.$fetchresult);
1403: return '/adm/notfound.html';
1404: }
1405: }
1406: }
1407: unless ( $fetchresult eq 'ok') {
1408: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1409: ' to host '.$home.': '.$fetchresult);
1410: }
1411: return $fetchresult;
1412: }
1413:
1414: sub build_filepath {
1415: my ($fpath) = @_;
1416: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1417: unless ($fpath eq '') {
1418: my @parts=split('/',$fpath);
1419: foreach my $part (@parts) {
1420: $filepath.= '/'.$part;
1421: if ((-e $filepath)!=1) {
1422: mkdir($filepath,0777);
1423: }
1424: }
1425: }
1426: return $filepath;
1427: }
1428:
1429: sub store_edited_file {
1430: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1431: my $file = $primary_url;
1432: $file =~ s#^/uploaded/$docudom/$docuname/##;
1433: my $fpath = '';
1434: my $fname = $file;
1435: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1436: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1437: my $filepath = &build_filepath($fpath);
1438: open(my $fh,'>'.$filepath.'/'.$fname);
1439: print $fh $content;
1440: close($fh);
1441: my $home=&homeserver($docuname,$docudom);
1442: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1443: $home);
1444: if ($$fetchresult eq 'ok') {
1445: return '/uploaded/'.$fpath.'/'.$fname;
1446: } else {
1447: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1448: ' to host '.$home.': '.$$fetchresult);
1449: return '/adm/notfound.html';
1450: }
1451: }
1452:
1453: sub clean_filename {
1454: my ($fname,$args)=@_;
1455: # Replace Windows backslashes by forward slashes
1456: $fname=~s/\\/\//g;
1457: if (!$args->{'keep_path'}) {
1458: # Get rid of everything but the actual filename
1459: $fname=~s/^.*\/([^\/]+)$/$1/;
1460: }
1461: # Replace spaces by underscores
1462: $fname=~s/\s+/\_/g;
1463: # Replace all other weird characters by nothing
1464: $fname=~s{[^/\w\.\-]}{}g;
1465: # Replace all .\d. sequences with _\d. so they no longer look like version
1466: # numbers
1467: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1468: return $fname;
1469: }
1470:
1471: # --------------- Take an uploaded file and put it into the userfiles directory
1472: # input: $formname - the contents of the file are in $env{"form.$formname"}
1473: # the desired filenam is in $env{"form.$formname.filename"}
1474: # $coursedoc - if true up to the current course
1475: # if false
1476: # $subdir - directory in userfile to store the file into
1477: # $parser, $allfiles, $codebase - unknown
1478: #
1479: # output: url of file in userspace, or error: <message>
1480: # or /adm/notfound.html if failure to upload occurse
1481:
1482:
1483: sub userfileupload {
1484: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,$destudom)=@_;
1485: if (!defined($subdir)) { $subdir='unknown'; }
1486: my $fname=$env{'form.'.$formname.'.filename'};
1487: $fname=&clean_filename($fname);
1488: # See if there is anything left
1489: unless ($fname) { return 'error: no uploaded file'; }
1490: chop($env{'form.'.$formname});
1491: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1492: my $now = time;
1493: my $filepath = 'tmp/helprequests/'.$now;
1494: my @parts=split(/\//,$filepath);
1495: my $fullpath = $perlvar{'lonDaemons'};
1496: for (my $i=0;$i<@parts;$i++) {
1497: $fullpath .= '/'.$parts[$i];
1498: if ((-e $fullpath)!=1) {
1499: mkdir($fullpath,0777);
1500: }
1501: }
1502: open(my $fh,'>'.$fullpath.'/'.$fname);
1503: print $fh $env{'form.'.$formname};
1504: close($fh);
1505: return $fullpath.'/'.$fname;
1506: } elsif (($formname eq 'coursecreatorxml') && ($subdir eq 'batchupload')) { #files uploaded to create course page are handled differently
1507: my $filepath = 'tmp/addcourse/'.$destudom.'/web/'.$env{'user.name'}.
1508: '_'.$env{'user.domain'}.'/pending';
1509: my @parts=split(/\//,$filepath);
1510: my $fullpath = $perlvar{'lonDaemons'};
1511: for (my $i=0;$i<@parts;$i++) {
1512: $fullpath .= '/'.$parts[$i];
1513: if ((-e $fullpath)!=1) {
1514: mkdir($fullpath,0777);
1515: }
1516: }
1517: open(my $fh,'>'.$fullpath.'/'.$fname);
1518: print $fh $env{'form.'.$formname};
1519: close($fh);
1520: return $fullpath.'/'.$fname;
1521: }
1522:
1523: # Create the directory if not present
1524: $fname="$subdir/$fname";
1525: if ($coursedoc) {
1526: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1527: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1528: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1529: return &finishuserfileupload($docuname,$docudom,
1530: $formname,$fname,$parser,$allfiles,
1531: $codebase);
1532: } else {
1533: $fname=$env{'form.folder'}.'/'.$fname;
1534: return &process_coursefile('uploaddoc',$docuname,$docudom,
1535: $fname,$formname,$parser,
1536: $allfiles,$codebase);
1537: }
1538: } elsif (defined($destuname)) {
1539: my $docuname=$destuname;
1540: my $docudom=$destudom;
1541: return &finishuserfileupload($docuname,$docudom,$formname,
1542: $fname,$parser,$allfiles,$codebase);
1543:
1544: } else {
1545: my $docuname=$env{'user.name'};
1546: my $docudom=$env{'user.domain'};
1547: if (exists($env{'form.group'})) {
1548: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1549: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1550: }
1551: return &finishuserfileupload($docuname,$docudom,$formname,
1552: $fname,$parser,$allfiles,$codebase);
1553: }
1554: }
1555:
1556: sub finishuserfileupload {
1557: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
1558: my $path=$docudom.'/'.$docuname.'/';
1559: my $filepath=$perlvar{'lonDocRoot'};
1560: my ($fnamepath,$file);
1561: $file=$fname;
1562: if ($fname=~m|/|) {
1563: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1564: $path.=$fnamepath.'/';
1565: }
1566: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1567: my $count;
1568: for ($count=4;$count<=$#parts;$count++) {
1569: $filepath.="/$parts[$count]";
1570: if ((-e $filepath)!=1) {
1571: mkdir($filepath,0777);
1572: }
1573: }
1574: # Save the file
1575: {
1576: if (!open(FH,'>'.$filepath.'/'.$file)) {
1577: &logthis('Failed to create '.$filepath.'/'.$file);
1578: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1579: return '/adm/notfound.html';
1580: }
1581: if (!print FH ($env{'form.'.$formname})) {
1582: &logthis('Failed to write to '.$filepath.'/'.$file);
1583: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1584: return '/adm/notfound.html';
1585: }
1586: close(FH);
1587: }
1588: if ($parser eq 'parse') {
1589: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1590: $codebase);
1591: unless ($parse_result eq 'ok') {
1592: &logthis('Failed to parse '.$filepath.$file.
1593: ' for embedded media: '.$parse_result);
1594: }
1595: }
1596: # Notify homeserver to grep it
1597: #
1598: my $docuhome=&homeserver($docuname,$docudom);
1599: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1600: if ($fetchresult eq 'ok') {
1601: #
1602: # Return the URL to it
1603: return '/uploaded/'.$path.$file;
1604: } else {
1605: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1606: ': '.$fetchresult);
1607: return '/adm/notfound.html';
1608: }
1609: }
1610:
1611: sub extract_embedded_items {
1612: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1613: my @state = ();
1614: my %javafiles = (
1615: codebase => '',
1616: code => '',
1617: archive => ''
1618: );
1619: my %mediafiles = (
1620: src => '',
1621: movie => '',
1622: );
1623: my $p;
1624: if ($content) {
1625: $p = HTML::LCParser->new($content);
1626: } else {
1627: $p = HTML::LCParser->new($filepath.'/'.$file);
1628: }
1629: while (my $t=$p->get_token()) {
1630: if ($t->[0] eq 'S') {
1631: my ($tagname, $attr) = ($t->[1],$t->[2]);
1632: push (@state, $tagname);
1633: if (lc($tagname) eq 'allow') {
1634: &add_filetype($allfiles,$attr->{'src'},'src');
1635: }
1636: if (lc($tagname) eq 'img') {
1637: &add_filetype($allfiles,$attr->{'src'},'src');
1638: }
1639: if (lc($tagname) eq 'script') {
1640: if ($attr->{'archive'} =~ /\.jar$/i) {
1641: &add_filetype($allfiles,$attr->{'archive'},'archive');
1642: } else {
1643: &add_filetype($allfiles,$attr->{'src'},'src');
1644: }
1645: }
1646: if (lc($tagname) eq 'link') {
1647: if (lc($attr->{'rel'}) eq 'stylesheet') {
1648: &add_filetype($allfiles,$attr->{'href'},'href');
1649: }
1650: }
1651: if (lc($tagname) eq 'object' ||
1652: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1653: foreach my $item (keys(%javafiles)) {
1654: $javafiles{$item} = '';
1655: }
1656: }
1657: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1658: my $name = lc($attr->{'name'});
1659: foreach my $item (keys(%javafiles)) {
1660: if ($name eq $item) {
1661: $javafiles{$item} = $attr->{'value'};
1662: last;
1663: }
1664: }
1665: foreach my $item (keys(%mediafiles)) {
1666: if ($name eq $item) {
1667: &add_filetype($allfiles, $attr->{'value'}, 'value');
1668: last;
1669: }
1670: }
1671: }
1672: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1673: foreach my $item (keys(%javafiles)) {
1674: if ($attr->{$item}) {
1675: $javafiles{$item} = $attr->{$item};
1676: last;
1677: }
1678: }
1679: foreach my $item (keys(%mediafiles)) {
1680: if ($attr->{$item}) {
1681: &add_filetype($allfiles,$attr->{$item},$item);
1682: last;
1683: }
1684: }
1685: }
1686: } elsif ($t->[0] eq 'E') {
1687: my ($tagname) = ($t->[1]);
1688: if ($javafiles{'codebase'} ne '') {
1689: $javafiles{'codebase'} .= '/';
1690: }
1691: if (lc($tagname) eq 'applet' ||
1692: lc($tagname) eq 'object' ||
1693: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1694: ) {
1695: foreach my $item (keys(%javafiles)) {
1696: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1697: my $file=$javafiles{'codebase'}.$javafiles{$item};
1698: &add_filetype($allfiles,$file,$item);
1699: }
1700: }
1701: }
1702: pop @state;
1703: }
1704: }
1705: return 'ok';
1706: }
1707:
1708: sub add_filetype {
1709: my ($allfiles,$file,$type)=@_;
1710: if (exists($allfiles->{$file})) {
1711: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1712: push(@{$allfiles->{$file}}, &escape($type));
1713: }
1714: } else {
1715: @{$allfiles->{$file}} = (&escape($type));
1716: }
1717: }
1718:
1719: sub removeuploadedurl {
1720: my ($url)=@_;
1721: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1722: return &removeuserfile($uname,$udom,$fname);
1723: }
1724:
1725: sub removeuserfile {
1726: my ($docuname,$docudom,$fname)=@_;
1727: my $home=&homeserver($docuname,$docudom);
1728: my $result = &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1729: if ($result eq 'ok') {
1730: if (($fname !~ /\.meta$/) && (&is_portfolio_file($fname))) {
1731: my $metafile = $fname.'.meta';
1732: my $metaresult = &removeuserfile($docuname,$docudom,$metafile);
1733: my $url = "/uploaded/$docudom/$docuname/$fname";
1734: my ($file,$group) = (&parse_portfolio_url($url))[3,4];
1735: my $sqlresult =
1736: &update_portfolio_table($docuname,$docudom,$file,
1737: 'portfolio_metadata',$group,
1738: 'delete');
1739: }
1740: }
1741: return $result;
1742: }
1743:
1744: sub mkdiruserfile {
1745: my ($docuname,$docudom,$dir)=@_;
1746: my $home=&homeserver($docuname,$docudom);
1747: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1748: }
1749:
1750: sub renameuserfile {
1751: my ($docuname,$docudom,$old,$new)=@_;
1752: my $home=&homeserver($docuname,$docudom);
1753: my $result = &reply("renameuserfile:$docudom:$docuname:".
1754: &escape("$old").':'.&escape("$new"),$home);
1755: if ($result eq 'ok') {
1756: if (($old !~ /\.meta$/) && (&is_portfolio_file($old))) {
1757: my $oldmeta = $old.'.meta';
1758: my $newmeta = $new.'.meta';
1759: my $metaresult =
1760: &renameuserfile($docuname,$docudom,$oldmeta,$newmeta);
1761: my $url = "/uploaded/$docudom/$docuname/$old";
1762: my ($file,$group) = (&parse_portfolio_url($url))[3,4];
1763: my $sqlresult =
1764: &update_portfolio_table($docuname,$docudom,$file,
1765: 'portfolio_metadata',$group,
1766: 'delete');
1767: }
1768: }
1769: return $result;
1770: }
1771:
1772: # ------------------------------------------------------------------------- Log
1773:
1774: sub log {
1775: my ($dom,$nam,$hom,$what)=@_;
1776: return critical("log:$dom:$nam:$what",$hom);
1777: }
1778:
1779: # ------------------------------------------------------------------ Course Log
1780: #
1781: # This routine flushes several buffers of non-mission-critical nature
1782: #
1783:
1784: sub flushcourselogs {
1785: &logthis('Flushing log buffers');
1786: #
1787: # course logs
1788: # This is a log of all transactions in a course, which can be used
1789: # for data mining purposes
1790: #
1791: # It also collects the courseid database, which lists last transaction
1792: # times and course titles for all courseids
1793: #
1794: my %courseidbuffer=();
1795: foreach my $crsid (keys %courselogs) {
1796: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1797: &escape($courselogs{$crsid}),
1798: $coursehombuf{$crsid}) eq 'ok') {
1799: delete $courselogs{$crsid};
1800: } else {
1801: &logthis('Failed to flush log buffer for '.$crsid);
1802: if (length($courselogs{$crsid})>40000) {
1803: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
1804: " exceeded maximum size, deleting.</font>");
1805: delete $courselogs{$crsid};
1806: }
1807: }
1808: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1809: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1810: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1811: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1812: } else {
1813: $courseidbuffer{$coursehombuf{$crsid}}=
1814: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1815: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1816: }
1817: }
1818: #
1819: # Write course id database (reverse lookup) to homeserver of courses
1820: # Is used in pickcourse
1821: #
1822: foreach my $crsid (keys(%courseidbuffer)) {
1823: &courseidput($hostdom{$crsid},$courseidbuffer{$crsid},$crsid);
1824: }
1825: #
1826: # File accesses
1827: # Writes to the dynamic metadata of resources to get hit counts, etc.
1828: #
1829: foreach my $entry (keys(%accesshash)) {
1830: if ($entry =~ /___count$/) {
1831: my ($dom,$name);
1832: ($dom,$name,undef)=
1833: ($entry=~m{___($match_domain)/($match_name)/(.*)___count$});
1834: if (! defined($dom) || $dom eq '' ||
1835: ! defined($name) || $name eq '') {
1836: my $cid = $env{'request.course.id'};
1837: $dom = $env{'request.'.$cid.'.domain'};
1838: $name = $env{'request.'.$cid.'.num'};
1839: }
1840: my $value = $accesshash{$entry};
1841: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1842: my %temphash=($url => $value);
1843: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1844: if ($result eq 'ok') {
1845: delete $accesshash{$entry};
1846: } elsif ($result eq 'unknown_cmd') {
1847: # Target server has old code running on it.
1848: my %temphash=($entry => $value);
1849: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1850: delete $accesshash{$entry};
1851: }
1852: }
1853: } else {
1854: my ($dom,$name) = ($entry=~m{___($match_domain)/($match_name)/(.*)___(\w+)$});
1855: my %temphash=($entry => $accesshash{$entry});
1856: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1857: delete $accesshash{$entry};
1858: }
1859: }
1860: }
1861: #
1862: # Roles
1863: # Reverse lookup of user roles for course faculty/staff and co-authorship
1864: #
1865: foreach my $entry (keys(%userrolehash)) {
1866: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1867: split(/\:/,$entry);
1868: if (&Apache::lonnet::put('nohist_userroles',
1869: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1870: $rudom,$runame) eq 'ok') {
1871: delete $userrolehash{$entry};
1872: }
1873: }
1874: #
1875: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1876: #
1877: my %domrolebuffer = ();
1878: foreach my $entry (keys %domainrolehash) {
1879: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1880: if ($domrolebuffer{$rudom}) {
1881: $domrolebuffer{$rudom}.='&'.&escape($entry).
1882: '='.&escape($domainrolehash{$entry});
1883: } else {
1884: $domrolebuffer{$rudom}.=&escape($entry).
1885: '='.&escape($domainrolehash{$entry});
1886: }
1887: delete $domainrolehash{$entry};
1888: }
1889: foreach my $dom (keys(%domrolebuffer)) {
1890: foreach my $tryserver (keys %libserv) {
1891: if ($hostdom{$tryserver} eq $dom) {
1892: unless (&reply('domroleput:'.$dom.':'.
1893: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1894: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1895: }
1896: }
1897: }
1898: }
1899: $dumpcount++;
1900: }
1901:
1902: sub courselog {
1903: my $what=shift;
1904: $what=time.':'.$what;
1905: unless ($env{'request.course.id'}) { return ''; }
1906: $coursedombuf{$env{'request.course.id'}}=
1907: $env{'course.'.$env{'request.course.id'}.'.domain'};
1908: $coursenumbuf{$env{'request.course.id'}}=
1909: $env{'course.'.$env{'request.course.id'}.'.num'};
1910: $coursehombuf{$env{'request.course.id'}}=
1911: $env{'course.'.$env{'request.course.id'}.'.home'};
1912: $coursedescrbuf{$env{'request.course.id'}}=
1913: $env{'course.'.$env{'request.course.id'}.'.description'};
1914: $courseinstcodebuf{$env{'request.course.id'}}=
1915: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1916: $courseownerbuf{$env{'request.course.id'}}=
1917: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1918: $coursetypebuf{$env{'request.course.id'}}=
1919: $env{'course.'.$env{'request.course.id'}.'.type'};
1920: if (defined $courselogs{$env{'request.course.id'}}) {
1921: $courselogs{$env{'request.course.id'}}.='&'.$what;
1922: } else {
1923: $courselogs{$env{'request.course.id'}}.=$what;
1924: }
1925: if (length($courselogs{$env{'request.course.id'}})>4048) {
1926: &flushcourselogs();
1927: }
1928: }
1929:
1930: sub courseacclog {
1931: my $fnsymb=shift;
1932: unless ($env{'request.course.id'}) { return ''; }
1933: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1934: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1935: $what.=':POST';
1936: # FIXME: Probably ought to escape things....
1937: foreach my $key (keys(%env)) {
1938: if ($key=~/^form\.(.*)/) {
1939: $what.=':'.$1.'='.$env{$key};
1940: }
1941: }
1942: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1943: # FIXME: We should not be depending on a form parameter that someone
1944: # editing lonsearchcat.pm might change in the future.
1945: if ($env{'form.phase'} eq 'course_search') {
1946: $what.= ':POST';
1947: # FIXME: Probably ought to escape things....
1948: foreach my $element ('courseexp','crsfulltext','crsrelated',
1949: 'crsdiscuss') {
1950: $what.=':'.$element.'='.$env{'form.'.$element};
1951: }
1952: }
1953: }
1954: &courselog($what);
1955: }
1956:
1957: sub countacc {
1958: my $url=&declutter(shift);
1959: return if (! defined($url) || $url eq '');
1960: unless ($env{'request.course.id'}) { return ''; }
1961: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1962: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1963: $accesshash{$key}++;
1964: }
1965:
1966: sub linklog {
1967: my ($from,$to)=@_;
1968: $from=&declutter($from);
1969: $to=&declutter($to);
1970: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1971: $accesshash{$to.'___'.$from.'___goto'}=1;
1972: }
1973:
1974: sub userrolelog {
1975: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1976: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
1977: ($trole=~/^in/) || ($trole=~/^cc/) ||
1978: ($trole=~/^ep/) || ($trole=~/^cr/) ||
1979: ($trole=~/^ta/)) {
1980: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1981: $userrolehash
1982: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1983: =$tend.':'.$tstart;
1984: }
1985: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
1986: ($trole=~/^li/) || ($trole=~/^li/) ||
1987: ($trole=~/^au/) || ($trole=~/^dg/) ||
1988: ($trole=~/^sc/)) {
1989: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1990: $domainrolehash
1991: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1992: = $tend.':'.$tstart;
1993: }
1994: }
1995:
1996: sub get_course_adv_roles {
1997: my $cid=shift;
1998: $cid=$env{'request.course.id'} unless (defined($cid));
1999: my %coursehash=&coursedescription($cid);
2000: my %nothide=();
2001: foreach my $user (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
2002: $nothide{join(':',split(/[\@\:]/,$user))}=1;
2003: }
2004: my %returnhash=();
2005: my %dumphash=
2006: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
2007: my $now=time;
2008: foreach my $entry (keys %dumphash) {
2009: my ($tend,$tstart)=split(/\:/,$dumphash{$entry});
2010: if (($tstart) && ($tstart<0)) { next; }
2011: if (($tend) && ($tend<$now)) { next; }
2012: if (($tstart) && ($now<$tstart)) { next; }
2013: my ($role,$username,$domain,$section)=split(/\:/,$entry);
2014: if ($username eq '' || $domain eq '') { next; }
2015: if ((&privileged($username,$domain)) &&
2016: (!$nothide{$username.':'.$domain})) { next; }
2017: if ($role eq 'cr') { next; }
2018: my $key=&plaintext($role);
2019: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
2020: if ($returnhash{$key}) {
2021: $returnhash{$key}.=','.$username.':'.$domain;
2022: } else {
2023: $returnhash{$key}=$username.':'.$domain;
2024: }
2025: }
2026: return %returnhash;
2027: }
2028:
2029: sub get_my_roles {
2030: my ($uname,$udom,$types,$roles,$roledoms)=@_;
2031: unless (defined($uname)) { $uname=$env{'user.name'}; }
2032: unless (defined($udom)) { $udom=$env{'user.domain'}; }
2033: my %dumphash=
2034: &dump('nohist_userroles',$udom,$uname);
2035: my %returnhash=();
2036: my $now=time;
2037: foreach my $entry (keys(%dumphash)) {
2038: my ($tend,$tstart)=split(/\:/,$dumphash{$entry});
2039: if (($tstart) && ($tstart<0)) { next; }
2040: my $status = 'active';
2041: if (($tend) && ($tend<$now)) {
2042: $status = 'previous';
2043: }
2044: if (($tstart) && ($now<$tstart)) {
2045: $status = 'future';
2046: }
2047: if (ref($types) eq 'ARRAY') {
2048: if (!grep(/^\Q$status\E$/,@{$types})) {
2049: next;
2050: }
2051: } else {
2052: if ($status ne 'active') {
2053: next;
2054: }
2055: }
2056: my ($role,$username,$domain,$section)=split(/\:/,$entry);
2057: if (ref($roledoms) eq 'ARRAY') {
2058: if (!grep(/^\Q$domain\E$/,@{$roledoms})) {
2059: next;
2060: }
2061: }
2062: if (ref($roles) eq 'ARRAY') {
2063: if (!grep(/^\Q$role\E$/,@{$roles})) {
2064: next;
2065: }
2066: }
2067: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
2068: }
2069: return %returnhash;
2070: }
2071:
2072: # ----------------------------------------------------- Frontpage Announcements
2073: #
2074: #
2075:
2076: sub postannounce {
2077: my ($server,$text)=@_;
2078: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
2079: unless ($text=~/\w/) { $text=''; }
2080: return &reply('setannounce:'.&escape($text),$server);
2081: }
2082:
2083: sub getannounce {
2084:
2085: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
2086: my $announcement='';
2087: while (my $line = <$fh>) { $announcement .= $line; }
2088: close($fh);
2089: if ($announcement=~/\w/) {
2090: return
2091: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
2092: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
2093: } else {
2094: return '';
2095: }
2096: } else {
2097: return '';
2098: }
2099: }
2100:
2101: # ---------------------------------------------------------- Course ID routines
2102: # Deal with domain's nohist_courseid.db files
2103: #
2104:
2105: sub courseidput {
2106: my ($domain,$what,$coursehome)=@_;
2107: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
2108: }
2109:
2110: sub courseiddump {
2111: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref,$typefilter,$regexp_ok)=@_;
2112: my %returnhash=();
2113: unless ($domfilter) { $domfilter=''; }
2114: foreach my $tryserver (keys %libserv) {
2115: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
2116: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
2117: foreach my $line (
2118: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
2119: $sincefilter.':'.&escape($descfilter).':'.
2120: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter).':'.&escape($typefilter).':'.&escape($regexp_ok),
2121: $tryserver))) {
2122: my ($key,$value)=split(/\=/,$line,2);
2123: if (($key) && ($value)) {
2124: $returnhash{&unescape($key)}=$value;
2125: }
2126: }
2127: }
2128: }
2129: }
2130: return %returnhash;
2131: }
2132:
2133: # ---------------------------------------------------------- DC e-mail
2134:
2135: sub dcmailput {
2136: my ($domain,$msgid,$message,$server)=@_;
2137: my $status = &Apache::lonnet::critical(
2138: 'dcmailput:'.$domain.':'.&escape($msgid).'='.
2139: &escape($message),$server);
2140: return $status;
2141: }
2142:
2143: sub dcmaildump {
2144: my ($dom,$startdate,$enddate,$senders) = @_;
2145: my %returnhash=();
2146: if (exists($domain_primary{$dom})) {
2147: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
2148: &escape($enddate).':';
2149: my @esc_senders=map { &escape($_)} @$senders;
2150: $cmd.=&escape(join('&',@esc_senders));
2151: foreach my $line (split(/\&/,&reply($cmd,$domain_primary{$dom}))) {
2152: my ($key,$value) = split(/\=/,$line,2);
2153: if (($key) && ($value)) {
2154: $returnhash{&unescape($key)} = &unescape($value);
2155: }
2156: }
2157: }
2158: return %returnhash;
2159: }
2160: # ---------------------------------------------------------- Domain roles
2161:
2162: sub get_domain_roles {
2163: my ($dom,$roles,$startdate,$enddate)=@_;
2164: if (undef($startdate) || $startdate eq '') {
2165: $startdate = '.';
2166: }
2167: if (undef($enddate) || $enddate eq '') {
2168: $enddate = '.';
2169: }
2170: my $rolelist = join(':',@{$roles});
2171: my %personnel = ();
2172: foreach my $tryserver (keys(%libserv)) {
2173: if ($hostdom{$tryserver} eq $dom) {
2174: %{$personnel{$tryserver}}=();
2175: foreach my $line (
2176: split(/\&/,&reply('domrolesdump:'.$dom.':'.
2177: &escape($startdate).':'.&escape($enddate).':'.
2178: &escape($rolelist), $tryserver))) {
2179: my ($key,$value) = split(/\=/,$line,2);
2180: if (($key) && ($value)) {
2181: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
2182: }
2183: }
2184: }
2185: }
2186: return %personnel;
2187: }
2188:
2189: # ----------------------------------------------------------- Check out an item
2190:
2191: sub get_first_access {
2192: my ($type,$argsymb)=@_;
2193: my ($symb,$courseid,$udom,$uname)=&whichuser();
2194: if ($argsymb) { $symb=$argsymb; }
2195: my ($map,$id,$res)=&decode_symb($symb);
2196: if ($type eq 'map') {
2197: $res=&symbread($map);
2198: } else {
2199: $res=$symb;
2200: }
2201: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
2202: return $times{"$courseid\0$res"};
2203: }
2204:
2205: sub set_first_access {
2206: my ($type)=@_;
2207: my ($symb,$courseid,$udom,$uname)=&whichuser();
2208: my ($map,$id,$res)=&decode_symb($symb);
2209: if ($type eq 'map') {
2210: $res=&symbread($map);
2211: } else {
2212: $res=$symb;
2213: }
2214: my $firstaccess=&get_first_access($type,$symb);
2215: if (!$firstaccess) {
2216: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
2217: }
2218: return 'already_set';
2219: }
2220:
2221: sub checkout {
2222: my ($symb,$tuname,$tudom,$tcrsid)=@_;
2223: my $now=time;
2224: my $lonhost=$perlvar{'lonHostID'};
2225: my $infostr=&escape(
2226: 'CHECKOUTTOKEN&'.
2227: $tuname.'&'.
2228: $tudom.'&'.
2229: $tcrsid.'&'.
2230: $symb.'&'.
2231: $now.'&'.$ENV{'REMOTE_ADDR'});
2232: my $token=&reply('tmpput:'.$infostr,$lonhost);
2233: if ($token=~/^error\:/) {
2234: &logthis("<font color=\"blue\">WARNING: ".
2235: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
2236: "</font>");
2237: return '';
2238: }
2239:
2240: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
2241: $token=~tr/a-z/A-Z/;
2242:
2243: my %infohash=('resource.0.outtoken' => $token,
2244: 'resource.0.checkouttime' => $now,
2245: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
2246:
2247: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2248: return '';
2249: } else {
2250: &logthis("<font color=\"blue\">WARNING: ".
2251: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
2252: "</font>");
2253: }
2254:
2255: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2256: &escape('Checkout '.$infostr.' - '.
2257: $token)) ne 'ok') {
2258: return '';
2259: } else {
2260: &logthis("<font color=\"blue\">WARNING: ".
2261: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
2262: "</font>");
2263: }
2264: return $token;
2265: }
2266:
2267: # ------------------------------------------------------------ Check in an item
2268:
2269: sub checkin {
2270: my $token=shift;
2271: my $now=time;
2272: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2273: $lonhost=~tr/A-Z/a-z/;
2274: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
2275: $dtoken=~s/\W/\_/g;
2276: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2277: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2278:
2279: unless (($tuname) && ($tudom)) {
2280: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2281: return '';
2282: }
2283:
2284: unless (&allowed('mgr',$tcrsid)) {
2285: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2286: $env{'user.name'}.' - '.$env{'user.domain'});
2287: return '';
2288: }
2289:
2290: my %infohash=('resource.0.intoken' => $token,
2291: 'resource.0.checkintime' => $now,
2292: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2293:
2294: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2295: return '';
2296: }
2297:
2298: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2299: &escape('Checkin - '.$token)) ne 'ok') {
2300: return '';
2301: }
2302:
2303: return ($symb,$tuname,$tudom,$tcrsid);
2304: }
2305:
2306: # --------------------------------------------- Set Expire Date for Spreadsheet
2307:
2308: sub expirespread {
2309: my ($uname,$udom,$stype,$usymb)=@_;
2310: my $cid=$env{'request.course.id'};
2311: if ($cid) {
2312: my $now=time;
2313: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2314: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2315: $env{'course.'.$cid.'.num'}.
2316: ':nohist_expirationdates:'.
2317: &escape($key).'='.$now,
2318: $env{'course.'.$cid.'.home'})
2319: }
2320: return 'ok';
2321: }
2322:
2323: # ----------------------------------------------------- Devalidate Spreadsheets
2324:
2325: sub devalidate {
2326: my ($symb,$uname,$udom)=@_;
2327: my $cid=$env{'request.course.id'};
2328: if ($cid) {
2329: # delete the stored spreadsheets for
2330: # - the student level sheet of this user in course's homespace
2331: # - the assessment level sheet for this resource
2332: # for this user in user's homespace
2333: # - current conditional state info
2334: my $key=$uname.':'.$udom.':';
2335: my $status=
2336: &del('nohist_calculatedsheets',
2337: [$key.'studentcalc:'],
2338: $env{'course.'.$cid.'.domain'},
2339: $env{'course.'.$cid.'.num'})
2340: .' '.
2341: &del('nohist_calculatedsheets_'.$cid,
2342: [$key.'assesscalc:'.$symb],$udom,$uname);
2343: unless ($status eq 'ok ok') {
2344: &logthis('Could not devalidate spreadsheet '.
2345: $uname.' at '.$udom.' for '.
2346: $symb.': '.$status);
2347: }
2348: &delenv('user.state.'.$cid);
2349: }
2350: }
2351:
2352: sub get_scalar {
2353: my ($string,$end) = @_;
2354: my $value;
2355: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2356: $value = $1;
2357: } elsif ($$string =~ s/^([^&]*?)&//) {
2358: $value = $1;
2359: }
2360: return &unescape($value);
2361: }
2362:
2363: sub array2str {
2364: my (@array) = @_;
2365: my $result=&arrayref2str(\@array);
2366: $result=~s/^__ARRAY_REF__//;
2367: $result=~s/__END_ARRAY_REF__$//;
2368: return $result;
2369: }
2370:
2371: sub arrayref2str {
2372: my ($arrayref) = @_;
2373: my $result='__ARRAY_REF__';
2374: foreach my $elem (@$arrayref) {
2375: if(ref($elem) eq 'ARRAY') {
2376: $result.=&arrayref2str($elem).'&';
2377: } elsif(ref($elem) eq 'HASH') {
2378: $result.=&hashref2str($elem).'&';
2379: } elsif(ref($elem)) {
2380: #print("Got a ref of ".(ref($elem))." skipping.");
2381: } else {
2382: $result.=&escape($elem).'&';
2383: }
2384: }
2385: $result=~s/\&$//;
2386: $result .= '__END_ARRAY_REF__';
2387: return $result;
2388: }
2389:
2390: sub hash2str {
2391: my (%hash) = @_;
2392: my $result=&hashref2str(\%hash);
2393: $result=~s/^__HASH_REF__//;
2394: $result=~s/__END_HASH_REF__$//;
2395: return $result;
2396: }
2397:
2398: sub hashref2str {
2399: my ($hashref)=@_;
2400: my $result='__HASH_REF__';
2401: foreach my $key (sort(keys(%$hashref))) {
2402: if (ref($key) eq 'ARRAY') {
2403: $result.=&arrayref2str($key).'=';
2404: } elsif (ref($key) eq 'HASH') {
2405: $result.=&hashref2str($key).'=';
2406: } elsif (ref($key)) {
2407: $result.='=';
2408: #print("Got a ref of ".(ref($key))." skipping.");
2409: } else {
2410: if ($key) {$result.=&escape($key).'=';} else { last; }
2411: }
2412:
2413: if(ref($hashref->{$key}) eq 'ARRAY') {
2414: $result.=&arrayref2str($hashref->{$key}).'&';
2415: } elsif(ref($hashref->{$key}) eq 'HASH') {
2416: $result.=&hashref2str($hashref->{$key}).'&';
2417: } elsif(ref($hashref->{$key})) {
2418: $result.='&';
2419: #print("Got a ref of ".(ref($hashref->{$key}))." skipping.");
2420: } else {
2421: $result.=&escape($hashref->{$key}).'&';
2422: }
2423: }
2424: $result=~s/\&$//;
2425: $result .= '__END_HASH_REF__';
2426: return $result;
2427: }
2428:
2429: sub str2hash {
2430: my ($string)=@_;
2431: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2432: return %$hash;
2433: }
2434:
2435: sub str2hashref {
2436: my ($string) = @_;
2437:
2438: my %hash;
2439:
2440: if($string !~ /^__HASH_REF__/) {
2441: if (! ($string eq '' || !defined($string))) {
2442: $hash{'error'}='Not hash reference';
2443: }
2444: return (\%hash, $string);
2445: }
2446:
2447: $string =~ s/^__HASH_REF__//;
2448:
2449: while($string !~ /^__END_HASH_REF__/) {
2450: #key
2451: my $key='';
2452: if($string =~ /^__HASH_REF__/) {
2453: ($key, $string)=&str2hashref($string);
2454: if(defined($key->{'error'})) {
2455: $hash{'error'}='Bad data';
2456: return (\%hash, $string);
2457: }
2458: } elsif($string =~ /^__ARRAY_REF__/) {
2459: ($key, $string)=&str2arrayref($string);
2460: if($key->[0] eq 'Array reference error') {
2461: $hash{'error'}='Bad data';
2462: return (\%hash, $string);
2463: }
2464: } else {
2465: $string =~ s/^(.*?)=//;
2466: $key=&unescape($1);
2467: }
2468: $string =~ s/^=//;
2469:
2470: #value
2471: my $value='';
2472: if($string =~ /^__HASH_REF__/) {
2473: ($value, $string)=&str2hashref($string);
2474: if(defined($value->{'error'})) {
2475: $hash{'error'}='Bad data';
2476: return (\%hash, $string);
2477: }
2478: } elsif($string =~ /^__ARRAY_REF__/) {
2479: ($value, $string)=&str2arrayref($string);
2480: if($value->[0] eq 'Array reference error') {
2481: $hash{'error'}='Bad data';
2482: return (\%hash, $string);
2483: }
2484: } else {
2485: $value=&get_scalar(\$string,'__END_HASH_REF__');
2486: }
2487: $string =~ s/^&//;
2488:
2489: $hash{$key}=$value;
2490: }
2491:
2492: $string =~ s/^__END_HASH_REF__//;
2493:
2494: return (\%hash, $string);
2495: }
2496:
2497: sub str2array {
2498: my ($string)=@_;
2499: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2500: return @$array;
2501: }
2502:
2503: sub str2arrayref {
2504: my ($string) = @_;
2505: my @array;
2506:
2507: if($string !~ /^__ARRAY_REF__/) {
2508: if (! ($string eq '' || !defined($string))) {
2509: $array[0]='Array reference error';
2510: }
2511: return (\@array, $string);
2512: }
2513:
2514: $string =~ s/^__ARRAY_REF__//;
2515:
2516: while($string !~ /^__END_ARRAY_REF__/) {
2517: my $value='';
2518: if($string =~ /^__HASH_REF__/) {
2519: ($value, $string)=&str2hashref($string);
2520: if(defined($value->{'error'})) {
2521: $array[0] ='Array reference error';
2522: return (\@array, $string);
2523: }
2524: } elsif($string =~ /^__ARRAY_REF__/) {
2525: ($value, $string)=&str2arrayref($string);
2526: if($value->[0] eq 'Array reference error') {
2527: $array[0] ='Array reference error';
2528: return (\@array, $string);
2529: }
2530: } else {
2531: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2532: }
2533: $string =~ s/^&//;
2534:
2535: push(@array, $value);
2536: }
2537:
2538: $string =~ s/^__END_ARRAY_REF__//;
2539:
2540: return (\@array, $string);
2541: }
2542:
2543: # -------------------------------------------------------------------Temp Store
2544:
2545: sub tmpreset {
2546: my ($symb,$namespace,$domain,$stuname) = @_;
2547: if (!$symb) {
2548: $symb=&symbread();
2549: if (!$symb) { $symb= $env{'request.url'}; }
2550: }
2551: $symb=escape($symb);
2552:
2553: if (!$namespace) { $namespace=$env{'request.state'}; }
2554: $namespace=~s/\//\_/g;
2555: $namespace=~s/\W//g;
2556:
2557: if (!$domain) { $domain=$env{'user.domain'}; }
2558: if (!$stuname) { $stuname=$env{'user.name'}; }
2559: if ($domain eq 'public' && $stuname eq 'public') {
2560: $stuname=$ENV{'REMOTE_ADDR'};
2561: }
2562: my $path=$perlvar{'lonDaemons'}.'/tmp';
2563: my %hash;
2564: if (tie(%hash,'GDBM_File',
2565: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2566: &GDBM_WRCREAT(),0640)) {
2567: foreach my $key (keys %hash) {
2568: if ($key=~ /:$symb/) {
2569: delete($hash{$key});
2570: }
2571: }
2572: }
2573: }
2574:
2575: sub tmpstore {
2576: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2577:
2578: if (!$symb) {
2579: $symb=&symbread();
2580: if (!$symb) { $symb= $env{'request.url'}; }
2581: }
2582: $symb=escape($symb);
2583:
2584: if (!$namespace) {
2585: # I don't think we would ever want to store this for a course.
2586: # it seems this will only be used if we don't have a course.
2587: #$namespace=$env{'request.course.id'};
2588: #if (!$namespace) {
2589: $namespace=$env{'request.state'};
2590: #}
2591: }
2592: $namespace=~s/\//\_/g;
2593: $namespace=~s/\W//g;
2594: if (!$domain) { $domain=$env{'user.domain'}; }
2595: if (!$stuname) { $stuname=$env{'user.name'}; }
2596: if ($domain eq 'public' && $stuname eq 'public') {
2597: $stuname=$ENV{'REMOTE_ADDR'};
2598: }
2599: my $now=time;
2600: my %hash;
2601: my $path=$perlvar{'lonDaemons'}.'/tmp';
2602: if (tie(%hash,'GDBM_File',
2603: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2604: &GDBM_WRCREAT(),0640)) {
2605: $hash{"version:$symb"}++;
2606: my $version=$hash{"version:$symb"};
2607: my $allkeys='';
2608: foreach my $key (keys(%$storehash)) {
2609: $allkeys.=$key.':';
2610: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2611: }
2612: $hash{"$version:$symb:timestamp"}=$now;
2613: $allkeys.='timestamp';
2614: $hash{"$version:keys:$symb"}=$allkeys;
2615: if (untie(%hash)) {
2616: return 'ok';
2617: } else {
2618: return "error:$!";
2619: }
2620: } else {
2621: return "error:$!";
2622: }
2623: }
2624:
2625: # -----------------------------------------------------------------Temp Restore
2626:
2627: sub tmprestore {
2628: my ($symb,$namespace,$domain,$stuname) = @_;
2629:
2630: if (!$symb) {
2631: $symb=&symbread();
2632: if (!$symb) { $symb= $env{'request.url'}; }
2633: }
2634: $symb=escape($symb);
2635:
2636: if (!$namespace) { $namespace=$env{'request.state'}; }
2637:
2638: if (!$domain) { $domain=$env{'user.domain'}; }
2639: if (!$stuname) { $stuname=$env{'user.name'}; }
2640: if ($domain eq 'public' && $stuname eq 'public') {
2641: $stuname=$ENV{'REMOTE_ADDR'};
2642: }
2643: my %returnhash;
2644: $namespace=~s/\//\_/g;
2645: $namespace=~s/\W//g;
2646: my %hash;
2647: my $path=$perlvar{'lonDaemons'}.'/tmp';
2648: if (tie(%hash,'GDBM_File',
2649: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2650: &GDBM_READER(),0640)) {
2651: my $version=$hash{"version:$symb"};
2652: $returnhash{'version'}=$version;
2653: my $scope;
2654: for ($scope=1;$scope<=$version;$scope++) {
2655: my $vkeys=$hash{"$scope:keys:$symb"};
2656: my @keys=split(/:/,$vkeys);
2657: my $key;
2658: $returnhash{"$scope:keys"}=$vkeys;
2659: foreach $key (@keys) {
2660: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2661: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2662: }
2663: }
2664: if (!(untie(%hash))) {
2665: return "error:$!";
2666: }
2667: } else {
2668: return "error:$!";
2669: }
2670: return %returnhash;
2671: }
2672:
2673: # ----------------------------------------------------------------------- Store
2674:
2675: sub store {
2676: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2677: my $home='';
2678:
2679: if ($stuname) { $home=&homeserver($stuname,$domain); }
2680:
2681: $symb=&symbclean($symb);
2682: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2683:
2684: if (!$domain) { $domain=$env{'user.domain'}; }
2685: if (!$stuname) { $stuname=$env{'user.name'}; }
2686:
2687: &devalidate($symb,$stuname,$domain);
2688:
2689: $symb=escape($symb);
2690: if (!$namespace) {
2691: unless ($namespace=$env{'request.course.id'}) {
2692: return '';
2693: }
2694: }
2695: if (!$home) { $home=$env{'user.home'}; }
2696:
2697: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2698: $$storehash{'host'}=$perlvar{'lonHostID'};
2699:
2700: my $namevalue='';
2701: foreach my $key (keys(%$storehash)) {
2702: $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
2703: }
2704: $namevalue=~s/\&$//;
2705: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2706: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2707: }
2708:
2709: # -------------------------------------------------------------- Critical Store
2710:
2711: sub cstore {
2712: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2713: my $home='';
2714:
2715: if ($stuname) { $home=&homeserver($stuname,$domain); }
2716:
2717: $symb=&symbclean($symb);
2718: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2719:
2720: if (!$domain) { $domain=$env{'user.domain'}; }
2721: if (!$stuname) { $stuname=$env{'user.name'}; }
2722:
2723: &devalidate($symb,$stuname,$domain);
2724:
2725: $symb=escape($symb);
2726: if (!$namespace) {
2727: unless ($namespace=$env{'request.course.id'}) {
2728: return '';
2729: }
2730: }
2731: if (!$home) { $home=$env{'user.home'}; }
2732:
2733: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2734: $$storehash{'host'}=$perlvar{'lonHostID'};
2735:
2736: my $namevalue='';
2737: foreach my $key (keys(%$storehash)) {
2738: $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
2739: }
2740: $namevalue=~s/\&$//;
2741: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2742: return critical
2743: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2744: }
2745:
2746: # --------------------------------------------------------------------- Restore
2747:
2748: sub restore {
2749: my ($symb,$namespace,$domain,$stuname) = @_;
2750: my $home='';
2751:
2752: if ($stuname) { $home=&homeserver($stuname,$domain); }
2753:
2754: if (!$symb) {
2755: unless ($symb=escape(&symbread())) { return ''; }
2756: } else {
2757: $symb=&escape(&symbclean($symb));
2758: }
2759: if (!$namespace) {
2760: unless ($namespace=$env{'request.course.id'}) {
2761: return '';
2762: }
2763: }
2764: if (!$domain) { $domain=$env{'user.domain'}; }
2765: if (!$stuname) { $stuname=$env{'user.name'}; }
2766: if (!$home) { $home=$env{'user.home'}; }
2767: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2768:
2769: my %returnhash=();
2770: foreach my $line (split(/\&/,$answer)) {
2771: my ($name,$value)=split(/\=/,$line);
2772: $returnhash{&unescape($name)}=&thaw_unescape($value);
2773: }
2774: my $version;
2775: for ($version=1;$version<=$returnhash{'version'};$version++) {
2776: foreach my $item (split(/\:/,$returnhash{$version.':keys'})) {
2777: $returnhash{$item}=$returnhash{$version.':'.$item};
2778: }
2779: }
2780: return %returnhash;
2781: }
2782:
2783: # ---------------------------------------------------------- Course Description
2784:
2785: sub coursedescription {
2786: my ($courseid,$args)=@_;
2787: $courseid=~s/^\///;
2788: $courseid=~s/\_/\//g;
2789: my ($cdomain,$cnum)=split(/\//,$courseid);
2790: my $chome=&homeserver($cnum,$cdomain);
2791: my $normalid=$cdomain.'_'.$cnum;
2792: # need to always cache even if we get errors otherwise we keep
2793: # trying and trying and trying to get the course description.
2794: my %envhash=();
2795: my %returnhash=();
2796:
2797: my $expiretime=600;
2798: if ($env{'request.course.id'} eq $normalid) {
2799: $expiretime=120;
2800: }
2801:
2802: my $prefix='course.'.$cdomain.'_'.$cnum.'.';
2803: if (!$args->{'freshen_cache'}
2804: && ((time-$env{$prefix.'last_cache'}) < $expiretime) ) {
2805: foreach my $key (keys(%env)) {
2806: next if ($key !~ /^\Q$prefix\E(.*)/);
2807: my ($setting) = $1;
2808: $returnhash{$setting} = $env{$key};
2809: }
2810: return %returnhash;
2811: }
2812:
2813: # get the data agin
2814: if (!$args->{'one_time'}) {
2815: $envhash{'course.'.$normalid.'.last_cache'}=time;
2816: }
2817:
2818: if ($chome ne 'no_host') {
2819: %returnhash=&dump('environment',$cdomain,$cnum);
2820: if (!exists($returnhash{'con_lost'})) {
2821: $returnhash{'home'}= $chome;
2822: $returnhash{'domain'} = $cdomain;
2823: $returnhash{'num'} = $cnum;
2824: if (!defined($returnhash{'type'})) {
2825: $returnhash{'type'} = 'Course';
2826: }
2827: while (my ($name,$value) = each %returnhash) {
2828: $envhash{'course.'.$normalid.'.'.$name}=$value;
2829: }
2830: $returnhash{'url'}=&clutter($returnhash{'url'});
2831: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2832: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2833: $envhash{'course.'.$normalid.'.home'}=$chome;
2834: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2835: $envhash{'course.'.$normalid.'.num'}=$cnum;
2836: }
2837: }
2838: if (!$args->{'one_time'}) {
2839: &appenv(%envhash);
2840: }
2841: return %returnhash;
2842: }
2843:
2844: # -------------------------------------------------See if a user is privileged
2845:
2846: sub privileged {
2847: my ($username,$domain)=@_;
2848: my $rolesdump=&reply("dump:$domain:$username:roles",
2849: &homeserver($username,$domain));
2850: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2851: my $now=time;
2852: if ($rolesdump ne '') {
2853: foreach my $entry (split(/&/,$rolesdump)) {
2854: if ($entry!~/^rolesdef_/) {
2855: my ($area,$role)=split(/=/,$entry);
2856: $area=~s/\_\w\w$//;
2857: my ($trole,$tend,$tstart)=split(/_/,$role);
2858: if (($trole eq 'dc') || ($trole eq 'su')) {
2859: my $active=1;
2860: if ($tend) {
2861: if ($tend<$now) { $active=0; }
2862: }
2863: if ($tstart) {
2864: if ($tstart>$now) { $active=0; }
2865: }
2866: if ($active) { return 1; }
2867: }
2868: }
2869: }
2870: }
2871: return 0;
2872: }
2873:
2874: # -------------------------------------------------------- Get user privileges
2875:
2876: sub rolesinit {
2877: my ($domain,$username,$authhost)=@_;
2878: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2879: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2880: my %allroles=();
2881: my %allgroups=();
2882: my $now=time;
2883: my %userroles = ('user.login.time' => $now);
2884: my $group_privs;
2885:
2886: if ($rolesdump ne '') {
2887: foreach my $entry (split(/&/,$rolesdump)) {
2888: if ($entry!~/^rolesdef_/) {
2889: my ($area,$role)=split(/=/,$entry);
2890: $area=~s/\_\w\w$//;
2891: my ($trole,$tend,$tstart,$group_privs);
2892: if ($role=~/^cr/) {
2893: if ($role=~m|^(cr/$match_domain/$match_username/[a-zA-Z0-9]+)_(.*)$|) {
2894: ($trole,my $trest)=($role=~m|^(cr/$match_domain/$match_username/[a-zA-Z0-9]+)_(.*)$|);
2895: ($tend,$tstart)=split('_',$trest);
2896: } else {
2897: $trole=$role;
2898: }
2899: } elsif ($role =~ m|^gr/|) {
2900: ($trole,$tend,$tstart) = split(/_/,$role);
2901: ($trole,$group_privs) = split(/\//,$trole);
2902: $group_privs = &unescape($group_privs);
2903: } else {
2904: ($trole,$tend,$tstart)=split(/_/,$role);
2905: }
2906: my %new_role = &set_arearole($trole,$area,$tstart,$tend,$domain,
2907: $username);
2908: @userroles{keys(%new_role)} = @new_role{keys(%new_role)};
2909: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2910: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2911: if (($area ne '') && ($trole ne '')) {
2912: my $spec=$trole.'.'.$area;
2913: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2914: if ($trole =~ /^cr\//) {
2915: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2916: } elsif ($trole eq 'gr') {
2917: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
2918: } else {
2919: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2920: }
2921: }
2922: }
2923: }
2924: my ($author,$adv) = &set_userprivs(\%userroles,\%allroles,\%allgroups);
2925: $userroles{'user.adv'} = $adv;
2926: $userroles{'user.author'} = $author;
2927: $env{'user.adv'}=$adv;
2928: }
2929: return \%userroles;
2930: }
2931:
2932: sub set_arearole {
2933: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2934: # log the associated role with the area
2935: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2936: return ('user.role.'.$trole.'.'.$area => $tstart.'.'.$tend);
2937: }
2938:
2939: sub custom_roleprivs {
2940: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2941: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2942: my $homsvr=homeserver($rauthor,$rdomain);
2943: if ($hostname{$homsvr} ne '') {
2944: my ($rdummy,$roledef)=
2945: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2946: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2947: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2948: if (defined($syspriv)) {
2949: $$allroles{'cm./'}.=':'.$syspriv;
2950: $$allroles{$spec.'./'}.=':'.$syspriv;
2951: }
2952: if ($tdomain ne '') {
2953: if (defined($dompriv)) {
2954: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2955: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2956: }
2957: if (($trest ne '') && (defined($coursepriv))) {
2958: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2959: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2960: }
2961: }
2962: }
2963: }
2964: }
2965:
2966: sub group_roleprivs {
2967: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
2968: my $access = 1;
2969: my $now = time;
2970: if (($tend!=0) && ($tend<$now)) { $access = 0; }
2971: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
2972: if ($access) {
2973: my ($course,$group) = ($area =~ m|(/$match_domain/$match_courseid)/([^/]+)$|);
2974: $$allgroups{$course}{$group} .=':'.$group_privs;
2975: }
2976: }
2977:
2978: sub standard_roleprivs {
2979: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2980: if (defined($pr{$trole.':s'})) {
2981: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2982: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2983: }
2984: if ($tdomain ne '') {
2985: if (defined($pr{$trole.':d'})) {
2986: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2987: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2988: }
2989: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2990: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2991: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2992: }
2993: }
2994: }
2995:
2996: sub set_userprivs {
2997: my ($userroles,$allroles,$allgroups) = @_;
2998: my $author=0;
2999: my $adv=0;
3000: my %grouproles = ();
3001: if (keys(%{$allgroups}) > 0) {
3002: foreach my $role (keys %{$allroles}) {
3003: my ($trole,$area,$sec,$extendedarea);
3004: if ($role =~ m-^(\w+|cr/$match_domain/$match_username/\w+)\.(/$match_domain/$match_courseid)(/?\w*)-) {
3005: $trole = $1;
3006: $area = $2;
3007: $sec = $3;
3008: $extendedarea = $area.$sec;
3009: if (exists($$allgroups{$area})) {
3010: foreach my $group (keys(%{$$allgroups{$area}})) {
3011: my $spec = $trole.'.'.$extendedarea;
3012: $grouproles{$spec.'.'.$area.'/'.$group} =
3013: $$allgroups{$area}{$group};
3014: }
3015: }
3016: }
3017: }
3018: }
3019: foreach my $group (keys(%grouproles)) {
3020: $$allroles{$group} = $grouproles{$group};
3021: }
3022: foreach my $role (keys(%{$allroles})) {
3023: my %thesepriv;
3024: if (($role=~/^au/) || ($role=~/^ca/)) { $author=1; }
3025: foreach my $item (split(/:/,$$allroles{$role})) {
3026: if ($item ne '') {
3027: my ($privilege,$restrictions)=split(/&/,$item);
3028: if ($restrictions eq '') {
3029: $thesepriv{$privilege}='F';
3030: } elsif ($thesepriv{$privilege} ne 'F') {
3031: $thesepriv{$privilege}.=$restrictions;
3032: }
3033: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
3034: }
3035: }
3036: my $thesestr='';
3037: foreach my $priv (keys(%thesepriv)) {
3038: $thesestr.=':'.$priv.'&'.$thesepriv{$priv};
3039: }
3040: $userroles->{'user.priv.'.$role} = $thesestr;
3041: }
3042: return ($author,$adv);
3043: }
3044:
3045: # --------------------------------------------------------------- get interface
3046:
3047: sub get {
3048: my ($namespace,$storearr,$udomain,$uname)=@_;
3049: my $items='';
3050: foreach my $item (@$storearr) {
3051: $items.=&escape($item).'&';
3052: }
3053: $items=~s/\&$//;
3054: if (!$udomain) { $udomain=$env{'user.domain'}; }
3055: if (!$uname) { $uname=$env{'user.name'}; }
3056: my $uhome=&homeserver($uname,$udomain);
3057:
3058: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
3059: my @pairs=split(/\&/,$rep);
3060: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
3061: return @pairs;
3062: }
3063: my %returnhash=();
3064: my $i=0;
3065: foreach my $item (@$storearr) {
3066: $returnhash{$item}=&thaw_unescape($pairs[$i]);
3067: $i++;
3068: }
3069: return %returnhash;
3070: }
3071:
3072: # --------------------------------------------------------------- del interface
3073:
3074: sub del {
3075: my ($namespace,$storearr,$udomain,$uname)=@_;
3076: my $items='';
3077: foreach my $item (@$storearr) {
3078: $items.=&escape($item).'&';
3079: }
3080: $items=~s/\&$//;
3081: if (!$udomain) { $udomain=$env{'user.domain'}; }
3082: if (!$uname) { $uname=$env{'user.name'}; }
3083: my $uhome=&homeserver($uname,$udomain);
3084:
3085: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
3086: }
3087:
3088: # -------------------------------------------------------------- dump interface
3089:
3090: sub dump {
3091: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
3092: if (!$udomain) { $udomain=$env{'user.domain'}; }
3093: if (!$uname) { $uname=$env{'user.name'}; }
3094: my $uhome=&homeserver($uname,$udomain);
3095: if ($regexp) {
3096: $regexp=&escape($regexp);
3097: } else {
3098: $regexp='.';
3099: }
3100: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
3101: my @pairs=split(/\&/,$rep);
3102: my %returnhash=();
3103: foreach my $item (@pairs) {
3104: my ($key,$value)=split(/=/,$item,2);
3105: $key = &unescape($key);
3106: next if ($key =~ /^error: 2 /);
3107: $returnhash{$key}=&thaw_unescape($value);
3108: }
3109: return %returnhash;
3110: }
3111:
3112: # --------------------------------------------------------- dumpstore interface
3113:
3114: sub dumpstore {
3115: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
3116: if (!$udomain) { $udomain=$env{'user.domain'}; }
3117: if (!$uname) { $uname=$env{'user.name'}; }
3118: my $uhome=&homeserver($uname,$udomain);
3119: if ($regexp) {
3120: $regexp=&escape($regexp);
3121: } else {
3122: $regexp='.';
3123: }
3124: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
3125: my @pairs=split(/\&/,$rep);
3126: my %returnhash=();
3127: foreach my $item (@pairs) {
3128: my ($key,$value)=split(/=/,$item,2);
3129: next if ($key =~ /^error: 2 /);
3130: $returnhash{$key}=&thaw_unescape($value);
3131: }
3132: return %returnhash;
3133: }
3134:
3135: # -------------------------------------------------------------- keys interface
3136:
3137: sub getkeys {
3138: my ($namespace,$udomain,$uname)=@_;
3139: if (!$udomain) { $udomain=$env{'user.domain'}; }
3140: if (!$uname) { $uname=$env{'user.name'}; }
3141: my $uhome=&homeserver($uname,$udomain);
3142: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
3143: my @keyarray=();
3144: foreach my $key (split(/\&/,$rep)) {
3145: next if ($key =~ /^error: 2 /);
3146: push(@keyarray,&unescape($key));
3147: }
3148: return @keyarray;
3149: }
3150:
3151: # --------------------------------------------------------------- currentdump
3152: sub currentdump {
3153: my ($courseid,$sdom,$sname)=@_;
3154: $courseid = $env{'request.course.id'} if (! defined($courseid));
3155: $sdom = $env{'user.domain'} if (! defined($sdom));
3156: $sname = $env{'user.name'} if (! defined($sname));
3157: my $uhome = &homeserver($sname,$sdom);
3158: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
3159: return if ($rep =~ /^(error:|no_such_host)/);
3160: #
3161: my %returnhash=();
3162: #
3163: if ($rep eq "unknown_cmd") {
3164: # an old lond will not know currentdump
3165: # Do a dump and make it look like a currentdump
3166: my @tmp = &dumpstore($courseid,$sdom,$sname,'.');
3167: return if ($tmp[0] =~ /^(error:|no_such_host)/);
3168: my %hash = @tmp;
3169: @tmp=();
3170: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
3171: } else {
3172: my @pairs=split(/\&/,$rep);
3173: foreach my $pair (@pairs) {
3174: my ($key,$value)=split(/=/,$pair,2);
3175: my ($symb,$param) = split(/:/,$key);
3176: $returnhash{&unescape($symb)}->{&unescape($param)} =
3177: &thaw_unescape($value);
3178: }
3179: }
3180: return %returnhash;
3181: }
3182:
3183: sub convert_dump_to_currentdump{
3184: my %hash = %{shift()};
3185: my %returnhash;
3186: # Code ripped from lond, essentially. The only difference
3187: # here is the unescaping done by lonnet::dump(). Conceivably
3188: # we might run in to problems with parameter names =~ /^v\./
3189: while (my ($key,$value) = each(%hash)) {
3190: my ($v,$symb,$param) = split(/:/,$key);
3191: $symb = &unescape($symb);
3192: $param = &unescape($param);
3193: next if ($v eq 'version' || $symb eq 'keys');
3194: next if (exists($returnhash{$symb}) &&
3195: exists($returnhash{$symb}->{$param}) &&
3196: $returnhash{$symb}->{'v.'.$param} > $v);
3197: $returnhash{$symb}->{$param}=$value;
3198: $returnhash{$symb}->{'v.'.$param}=$v;
3199: }
3200: #
3201: # Remove all of the keys in the hashes which keep track of
3202: # the version of the parameter.
3203: while (my ($symb,$param_hash) = each(%returnhash)) {
3204: # use a foreach because we are going to delete from the hash.
3205: foreach my $key (keys(%$param_hash)) {
3206: delete($param_hash->{$key}) if ($key =~ /^v\./);
3207: }
3208: }
3209: return \%returnhash;
3210: }
3211:
3212: # ------------------------------------------------------ critical inc interface
3213:
3214: sub cinc {
3215: return &inc(@_,'critical');
3216: }
3217:
3218: # --------------------------------------------------------------- inc interface
3219:
3220: sub inc {
3221: my ($namespace,$store,$udomain,$uname,$critical) = @_;
3222: if (!$udomain) { $udomain=$env{'user.domain'}; }
3223: if (!$uname) { $uname=$env{'user.name'}; }
3224: my $uhome=&homeserver($uname,$udomain);
3225: my $items='';
3226: if (! ref($store)) {
3227: # got a single value, so use that instead
3228: $items = &escape($store).'=&';
3229: } elsif (ref($store) eq 'SCALAR') {
3230: $items = &escape($$store).'=&';
3231: } elsif (ref($store) eq 'ARRAY') {
3232: $items = join('=&',map {&escape($_);} @{$store});
3233: } elsif (ref($store) eq 'HASH') {
3234: while (my($key,$value) = each(%{$store})) {
3235: $items.= &escape($key).'='.&escape($value).'&';
3236: }
3237: }
3238: $items=~s/\&$//;
3239: if ($critical) {
3240: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
3241: } else {
3242: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
3243: }
3244: }
3245:
3246: # --------------------------------------------------------------- put interface
3247:
3248: sub put {
3249: my ($namespace,$storehash,$udomain,$uname)=@_;
3250: if (!$udomain) { $udomain=$env{'user.domain'}; }
3251: if (!$uname) { $uname=$env{'user.name'}; }
3252: my $uhome=&homeserver($uname,$udomain);
3253: my $items='';
3254: foreach my $item (keys(%$storehash)) {
3255: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3256: }
3257: $items=~s/\&$//;
3258: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3259: }
3260:
3261: # ------------------------------------------------------------ newput interface
3262:
3263: sub newput {
3264: my ($namespace,$storehash,$udomain,$uname)=@_;
3265: if (!$udomain) { $udomain=$env{'user.domain'}; }
3266: if (!$uname) { $uname=$env{'user.name'}; }
3267: my $uhome=&homeserver($uname,$udomain);
3268: my $items='';
3269: foreach my $key (keys(%$storehash)) {
3270: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3271: }
3272: $items=~s/\&$//;
3273: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
3274: }
3275:
3276: # --------------------------------------------------------- putstore interface
3277:
3278: sub putstore {
3279: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3280: if (!$udomain) { $udomain=$env{'user.domain'}; }
3281: if (!$uname) { $uname=$env{'user.name'}; }
3282: my $uhome=&homeserver($uname,$udomain);
3283: my $items='';
3284: foreach my $key (keys(%$storehash)) {
3285: $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
3286: }
3287: $items=~s/\&$//;
3288: my $esc_symb=&escape($symb);
3289: my $esc_v=&escape($version);
3290: my $reply =
3291: &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
3292: $uhome);
3293: if ($reply eq 'unknown_cmd') {
3294: # gfall back to way things use to be done
3295: return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
3296: $uname);
3297: }
3298: return $reply;
3299: }
3300:
3301: sub old_putstore {
3302: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3303: if (!$udomain) { $udomain=$env{'user.domain'}; }
3304: if (!$uname) { $uname=$env{'user.name'}; }
3305: my $uhome=&homeserver($uname,$udomain);
3306: my %newstorehash;
3307: foreach my $item (keys(%$storehash)) {
3308: my $key = $version.':'.&escape($symb).':'.$item;
3309: $newstorehash{$key} = $storehash->{$item};
3310: }
3311: my $items='';
3312: my %allitems = ();
3313: foreach my $item (keys(%newstorehash)) {
3314: if ($item =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
3315: my $key = $1.':keys:'.$2;
3316: $allitems{$key} .= $3.':';
3317: }
3318: $items.=$item.'='.&freeze_escape($newstorehash{$item}).'&';
3319: }
3320: foreach my $item (keys(%allitems)) {
3321: $allitems{$item} =~ s/\:$//;
3322: $items.= $item.'='.$allitems{$item}.'&';
3323: }
3324: $items=~s/\&$//;
3325: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3326: }
3327:
3328: # ------------------------------------------------------ critical put interface
3329:
3330: sub cput {
3331: my ($namespace,$storehash,$udomain,$uname)=@_;
3332: if (!$udomain) { $udomain=$env{'user.domain'}; }
3333: if (!$uname) { $uname=$env{'user.name'}; }
3334: my $uhome=&homeserver($uname,$udomain);
3335: my $items='';
3336: foreach my $item (keys(%$storehash)) {
3337: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3338: }
3339: $items=~s/\&$//;
3340: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
3341: }
3342:
3343: # -------------------------------------------------------------- eget interface
3344:
3345: sub eget {
3346: my ($namespace,$storearr,$udomain,$uname)=@_;
3347: my $items='';
3348: foreach my $item (@$storearr) {
3349: $items.=&escape($item).'&';
3350: }
3351: $items=~s/\&$//;
3352: if (!$udomain) { $udomain=$env{'user.domain'}; }
3353: if (!$uname) { $uname=$env{'user.name'}; }
3354: my $uhome=&homeserver($uname,$udomain);
3355: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3356: my @pairs=split(/\&/,$rep);
3357: my %returnhash=();
3358: my $i=0;
3359: foreach my $item (@$storearr) {
3360: $returnhash{$item}=&thaw_unescape($pairs[$i]);
3361: $i++;
3362: }
3363: return %returnhash;
3364: }
3365:
3366: # ------------------------------------------------------------ tmpput interface
3367: sub tmpput {
3368: my ($storehash,$server,$context)=@_;
3369: my $items='';
3370: foreach my $item (keys(%$storehash)) {
3371: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3372: }
3373: $items=~s/\&$//;
3374: if (defined($context)) {
3375: $items .= ':'.&escape($context);
3376: }
3377: return &reply("tmpput:$items",$server);
3378: }
3379:
3380: # ------------------------------------------------------------ tmpget interface
3381: sub tmpget {
3382: my ($token,$server)=@_;
3383: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3384: my $rep=&reply("tmpget:$token",$server);
3385: my %returnhash;
3386: foreach my $item (split(/\&/,$rep)) {
3387: my ($key,$value)=split(/=/,$item);
3388: $returnhash{&unescape($key)}=&thaw_unescape($value);
3389: }
3390: return %returnhash;
3391: }
3392:
3393: # ------------------------------------------------------------ tmpget interface
3394: sub tmpdel {
3395: my ($token,$server)=@_;
3396: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3397: return &reply("tmpdel:$token",$server);
3398: }
3399:
3400: # -------------------------------------------------- portfolio access checking
3401:
3402: sub portfolio_access {
3403: my ($requrl) = @_;
3404: my (undef,$udom,$unum,$file_name,$group) = &parse_portfolio_url($requrl);
3405: my $result = &get_portfolio_access($udom,$unum,$file_name,$group);
3406: if ($result) {
3407: my %setters;
3408: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3409: my ($startblock,$endblock) =
3410: &Apache::loncommon::blockcheck(\%setters,'port',$unum,$udom);
3411: if ($startblock && $endblock) {
3412: return 'B';
3413: }
3414: } else {
3415: my ($startblock,$endblock) =
3416: &Apache::loncommon::blockcheck(\%setters,'port');
3417: if ($startblock && $endblock) {
3418: return 'B';
3419: }
3420: }
3421: }
3422: if ($result eq 'ok') {
3423: return 'F';
3424: } elsif ($result =~ /^[^:]+:guest_/) {
3425: return 'A';
3426: }
3427: return '';
3428: }
3429:
3430: sub get_portfolio_access {
3431: my ($udom,$unum,$file_name,$group,$access_hash) = @_;
3432:
3433: if (!ref($access_hash)) {
3434: my $current_perms = &get_portfile_permissions($udom,$unum);
3435: my %access_controls = &get_access_controls($current_perms,$group,
3436: $file_name);
3437: $access_hash = $access_controls{$file_name};
3438: }
3439:
3440: my ($public,$guest,@domains,@users,@courses,@groups);
3441: my $now = time;
3442: if (ref($access_hash) eq 'HASH') {
3443: foreach my $key (keys(%{$access_hash})) {
3444: my ($num,$scope,$end,$start) = ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
3445: if ($start > $now) {
3446: next;
3447: }
3448: if ($end && $end<$now) {
3449: next;
3450: }
3451: if ($scope eq 'public') {
3452: $public = $key;
3453: last;
3454: } elsif ($scope eq 'guest') {
3455: $guest = $key;
3456: } elsif ($scope eq 'domains') {
3457: push(@domains,$key);
3458: } elsif ($scope eq 'users') {
3459: push(@users,$key);
3460: } elsif ($scope eq 'course') {
3461: push(@courses,$key);
3462: } elsif ($scope eq 'group') {
3463: push(@groups,$key);
3464: }
3465: }
3466: if ($public) {
3467: return 'ok';
3468: }
3469: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3470: if ($guest) {
3471: return $guest;
3472: }
3473: } else {
3474: if (@domains > 0) {
3475: foreach my $domkey (@domains) {
3476: if (ref($access_hash->{$domkey}{'dom'}) eq 'ARRAY') {
3477: if (grep(/^\Q$env{'user.domain'}\E$/,@{$access_hash->{$domkey}{'dom'}})) {
3478: return 'ok';
3479: }
3480: }
3481: }
3482: }
3483: if (@users > 0) {
3484: foreach my $userkey (@users) {
3485: if (exists($access_hash->{$userkey}{'users'}{$env{'user.name'}.':'.$env{'user.domain'}})) {
3486: return 'ok';
3487: }
3488: }
3489: }
3490: my %roleshash;
3491: my @courses_and_groups = @courses;
3492: push(@courses_and_groups,@groups);
3493: if (@courses_and_groups > 0) {
3494: my (%allgroups,%allroles);
3495: my ($start,$end,$role,$sec,$group);
3496: foreach my $envkey (%env) {
3497: if ($envkey =~ m-^user\.role\.(gr|cc|in|ta|ep|st)\./($match_domain)/($match_courseid)/?([^/]*)$-) {
3498: my $cid = $2.'_'.$3;
3499: if ($1 eq 'gr') {
3500: $group = $4;
3501: $allgroups{$cid}{$group} = $env{$envkey};
3502: } else {
3503: if ($4 eq '') {
3504: $sec = 'none';
3505: } else {
3506: $sec = $4;
3507: }
3508: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3509: }
3510: } elsif ($envkey =~ m-^user\.role\./cr/($match_domain/$match_username/\w*)./($match_domain)/($match_courseid)/?([^/]*)$-) {
3511: my $cid = $2.'_'.$3;
3512: if ($4 eq '') {
3513: $sec = 'none';
3514: } else {
3515: $sec = $4;
3516: }
3517: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3518: }
3519: }
3520: if (keys(%allroles) == 0) {
3521: return;
3522: }
3523: foreach my $key (@courses_and_groups) {
3524: my %content = %{$$access_hash{$key}};
3525: my $cnum = $content{'number'};
3526: my $cdom = $content{'domain'};
3527: my $cid = $cdom.'_'.$cnum;
3528: if (!exists($allroles{$cid})) {
3529: next;
3530: }
3531: foreach my $role_id (keys(%{$content{'roles'}})) {
3532: my @sections = @{$content{'roles'}{$role_id}{'section'}};
3533: my @groups = @{$content{'roles'}{$role_id}{'group'}};
3534: my @status = @{$content{'roles'}{$role_id}{'access'}};
3535: my @roles = @{$content{'roles'}{$role_id}{'role'}};
3536: foreach my $role (keys(%{$allroles{$cid}})) {
3537: if ((grep/^all$/,@roles) || (grep/^\Q$role\E$/,@roles)) {
3538: foreach my $sec (keys(%{$allroles{$cid}{$role}})) {
3539: if (&course_group_datechecker($allroles{$cid}{$role}{$sec},$now,\@status) eq 'ok') {
3540: if (grep/^all$/,@sections) {
3541: return 'ok';
3542: } else {
3543: if (grep/^$sec$/,@sections) {
3544: return 'ok';
3545: }
3546: }
3547: }
3548: }
3549: if (keys(%{$allgroups{$cid}}) == 0) {
3550: if (grep/^none$/,@groups) {
3551: return 'ok';
3552: }
3553: } else {
3554: if (grep/^all$/,@groups) {
3555: return 'ok';
3556: }
3557: foreach my $group (keys(%{$allgroups{$cid}})) {
3558: if (grep/^$group$/,@groups) {
3559: return 'ok';
3560: }
3561: }
3562: }
3563: }
3564: }
3565: }
3566: }
3567: }
3568: if ($guest) {
3569: return $guest;
3570: }
3571: }
3572: }
3573: return;
3574: }
3575:
3576: sub course_group_datechecker {
3577: my ($dates,$now,$status) = @_;
3578: my ($start,$end) = split(/\./,$dates);
3579: if (!$start && !$end) {
3580: return 'ok';
3581: }
3582: if (grep/^active$/,@{$status}) {
3583: if (((!$start) || ($start && $start <= $now)) && ((!$end) || ($end && $end >= $now))) {
3584: return 'ok';
3585: }
3586: }
3587: if (grep/^previous$/,@{$status}) {
3588: if ($end > $now ) {
3589: return 'ok';
3590: }
3591: }
3592: if (grep/^future$/,@{$status}) {
3593: if ($start > $now) {
3594: return 'ok';
3595: }
3596: }
3597: return;
3598: }
3599:
3600: sub parse_portfolio_url {
3601: my ($url) = @_;
3602:
3603: my ($type,$udom,$unum,$group,$file_name);
3604:
3605: if ($url =~ m-^/*(?:uploaded|editupload)/($match_domain)/($match_username)/portfolio(/.+)$-) {
3606: $type = 1;
3607: $udom = $1;
3608: $unum = $2;
3609: $file_name = $3;
3610: } elsif ($url =~ m-^/*(?:uploaded|editupload)/($match_domain)/($match_courseid)/groups/([^/]+)/portfolio/(.+)$-) {
3611: $type = 2;
3612: $udom = $1;
3613: $unum = $2;
3614: $group = $3;
3615: $file_name = $3.'/'.$4;
3616: }
3617: if (wantarray) {
3618: return ($type,$udom,$unum,$file_name,$group);
3619: }
3620: return $type;
3621: }
3622:
3623: sub is_portfolio_url {
3624: my ($url) = @_;
3625: return scalar(&parse_portfolio_url($url));
3626: }
3627:
3628: sub is_portfolio_file {
3629: my ($file) = @_;
3630: if (($file =~ /^portfolio/) || ($file =~ /^groups\/\w+\/portfolio/)) {
3631: return 1;
3632: }
3633: return;
3634: }
3635:
3636:
3637: # ---------------------------------------------- Custom access rule evaluation
3638:
3639: sub customaccess {
3640: my ($priv,$uri)=@_;
3641: my ($urole,$urealm)=split(/\./,$env{'request.role'},2);
3642: my (undef,$udom,$ucrs,$usec)=split(/\//,$urealm);
3643: $udom = &LONCAPA::clean_domain($udom);
3644: $ucrs = &LONCAPA::clean_username($ucrs);
3645: my $access=0;
3646: foreach my $right (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
3647: my ($effect,$realm,$role)=split(/\:/,$right);
3648: if ($role) {
3649: if ($role ne $urole) { next; }
3650: }
3651: foreach my $scope (split(/\s*\,\s*/,$realm)) {
3652: my ($tdom,$tcrs,$tsec)=split(/\_/,$scope);
3653: if ($tdom) {
3654: if ($tdom ne $udom) { next; }
3655: }
3656: if ($tcrs) {
3657: if ($tcrs ne $ucrs) { next; }
3658: }
3659: if ($tsec) {
3660: if ($tsec ne $usec) { next; }
3661: }
3662: $access=($effect eq 'allow');
3663: last;
3664: }
3665: if ($realm eq '' && $role eq '') {
3666: $access=($effect eq 'allow');
3667: }
3668: }
3669: return $access;
3670: }
3671:
3672: # ------------------------------------------------- Check for a user privilege
3673:
3674: sub allowed {
3675: my ($priv,$uri,$symb,$role)=@_;
3676: my $ver_orguri=$uri;
3677: $uri=&deversion($uri);
3678: my $orguri=$uri;
3679: $uri=&declutter($uri);
3680:
3681: if ($priv eq 'evb') {
3682: # Evade communication block restrictions for specified role in a course
3683: if ($env{'user.priv.'.$role} =~/evb\&([^\:]*)/) {
3684: return $1;
3685: } else {
3686: return;
3687: }
3688: }
3689:
3690: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3691: # Free bre access to adm and meta resources
3692: if (((($uri=~/^adm\//) && ($uri !~ m{/(?:smppg|bulletinboard)$}))
3693: || (($uri=~/\.meta$/) && ($uri!~m|^uploaded/|) ))
3694: && ($priv eq 'bre')) {
3695: return 'F';
3696: }
3697:
3698: # Free bre access to user's own portfolio contents
3699: my ($space,$domain,$name,@dir)=split('/',$uri);
3700: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3701: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
3702: my %setters;
3703: my ($startblock,$endblock) =
3704: &Apache::loncommon::blockcheck(\%setters,'port');
3705: if ($startblock && $endblock) {
3706: return 'B';
3707: } else {
3708: return 'F';
3709: }
3710: }
3711:
3712: # bre access to group portfolio for rgf priv in group, or mdg or vcg in course.
3713: if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
3714: && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
3715: if (exists($env{'request.course.id'})) {
3716: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
3717: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
3718: if (($domain eq $cdom) && ($name eq $cnum)) {
3719: my $courseprivid=$env{'request.course.id'};
3720: $courseprivid=~s/\_/\//;
3721: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
3722: .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
3723: return $1;
3724: } else {
3725: if ($env{'request.course.sec'}) {
3726: $courseprivid.='/'.$env{'request.course.sec'};
3727: }
3728: if ($env{'user.priv.'.$env{'request.role'}.'./'.
3729: $courseprivid} =~/(mdg|vcg)\&([^\:]*)/) {
3730: return $2;
3731: }
3732: }
3733: }
3734: }
3735: }
3736:
3737: # Free bre to public access
3738:
3739: if ($priv eq 'bre') {
3740: my $copyright=&metadata($uri,'copyright');
3741: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3742: return 'F';
3743: }
3744: if ($copyright eq 'priv') {
3745: $uri=~/([^\/]+)\/([^\/]+)\//;
3746: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3747: return '';
3748: }
3749: }
3750: if ($copyright eq 'domain') {
3751: $uri=~/([^\/]+)\/([^\/]+)\//;
3752: unless (($env{'user.domain'} eq $1) ||
3753: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3754: return '';
3755: }
3756: }
3757: if ($env{'request.role'}=~ /li\.\//) {
3758: # Library role, so allow browsing of resources in this domain.
3759: return 'F';
3760: }
3761: if ($copyright eq 'custom') {
3762: unless (&customaccess($priv,$uri)) { return ''; }
3763: }
3764: }
3765: # Domain coordinator is trying to create a course
3766: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3767: # uri is the requested domain in this case.
3768: # comparison to 'request.role.domain' shows if the user has selected
3769: # a role of dc for the domain in question.
3770: return 'F' if ($uri eq $env{'request.role.domain'});
3771: }
3772:
3773: my $thisallowed='';
3774: my $statecond=0;
3775: my $courseprivid='';
3776:
3777: # Course
3778:
3779: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3780: $thisallowed.=$1;
3781: }
3782:
3783: # Domain
3784:
3785: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3786: =~/\Q$priv\E\&([^\:]*)/) {
3787: $thisallowed.=$1;
3788: }
3789:
3790: # Course: uri itself is a course
3791: my $courseuri=$uri;
3792: $courseuri=~s/\_(\d)/\/$1/;
3793: $courseuri=~s/^([^\/])/\/$1/;
3794:
3795: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3796: =~/\Q$priv\E\&([^\:]*)/) {
3797: $thisallowed.=$1;
3798: }
3799:
3800: # URI is an uploaded document for this course, default permissions don't matter
3801: # not allowing 'edit' access (editupload) to uploaded course docs
3802: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3803: $thisallowed='';
3804: my ($match)=&is_on_map($uri);
3805: if ($match) {
3806: if ($env{'user.priv.'.$env{'request.role'}.'./'}
3807: =~/\Q$priv\E\&([^\:]*)/) {
3808: $thisallowed.=$1;
3809: }
3810: } else {
3811: my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
3812: if ($refuri) {
3813: if ($refuri =~ m|^/adm/|) {
3814: $thisallowed='F';
3815: } else {
3816: $refuri=&declutter($refuri);
3817: my ($match) = &is_on_map($refuri);
3818: if ($match) {
3819: $thisallowed='F';
3820: }
3821: }
3822: }
3823: }
3824: }
3825:
3826: if ($priv eq 'bre'
3827: && $thisallowed ne 'F'
3828: && $thisallowed ne '2'
3829: && &is_portfolio_url($uri)) {
3830: $thisallowed = &portfolio_access($uri);
3831: }
3832:
3833: # Full access at system, domain or course-wide level? Exit.
3834:
3835: if ($thisallowed=~/F/) {
3836: return 'F';
3837: }
3838:
3839: # If this is generating or modifying users, exit with special codes
3840:
3841: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3842: if (($priv eq 'cca') || ($priv eq 'caa')) {
3843: my ($audom,$auname)=split('/',$uri);
3844: # no author name given, so this just checks on the general right to make a co-author in this domain
3845: unless ($auname) { return $thisallowed; }
3846: # an author name is given, so we are about to actually make a co-author for a certain account
3847: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3848: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3849: ($audom ne $env{'request.role.domain'}))) { return ''; }
3850: }
3851: return $thisallowed;
3852: }
3853: #
3854: # Gathered so far: system, domain and course wide privileges
3855: #
3856: # Course: See if uri or referer is an individual resource that is part of
3857: # the course
3858:
3859: if ($env{'request.course.id'}) {
3860:
3861: $courseprivid=$env{'request.course.id'};
3862: if ($env{'request.course.sec'}) {
3863: $courseprivid.='/'.$env{'request.course.sec'};
3864: }
3865: $courseprivid=~s/\_/\//;
3866: my $checkreferer=1;
3867: my ($match,$cond)=&is_on_map($uri);
3868: if ($match) {
3869: $statecond=$cond;
3870: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3871: =~/\Q$priv\E\&([^\:]*)/) {
3872: $thisallowed.=$1;
3873: $checkreferer=0;
3874: }
3875: }
3876:
3877: if ($checkreferer) {
3878: my $refuri=$env{'httpref.'.$orguri};
3879: unless ($refuri) {
3880: foreach my $key (keys(%env)) {
3881: if ($key=~/^httpref\..*\*/) {
3882: my $pattern=$key;
3883: $pattern=~s/^httpref\.\/res\///;
3884: $pattern=~s/\*/\[\^\/\]\+/g;
3885: $pattern=~s/\//\\\//g;
3886: if ($orguri=~/$pattern/) {
3887: $refuri=$env{$key};
3888: }
3889: }
3890: }
3891: }
3892:
3893: if ($refuri) {
3894: $refuri=&declutter($refuri);
3895: my ($match,$cond)=&is_on_map($refuri);
3896: if ($match) {
3897: my $refstatecond=$cond;
3898: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3899: =~/\Q$priv\E\&([^\:]*)/) {
3900: $thisallowed.=$1;
3901: $uri=$refuri;
3902: $statecond=$refstatecond;
3903: }
3904: }
3905: }
3906: }
3907: }
3908:
3909: #
3910: # Gathered now: all privileges that could apply, and condition number
3911: #
3912: #
3913: # Full or no access?
3914: #
3915:
3916: if ($thisallowed=~/F/) {
3917: return 'F';
3918: }
3919:
3920: unless ($thisallowed) {
3921: return '';
3922: }
3923:
3924: # Restrictions exist, deal with them
3925: #
3926: # C:according to course preferences
3927: # R:according to resource settings
3928: # L:unless locked
3929: # X:according to user session state
3930: #
3931:
3932: # Possibly locked functionality, check all courses
3933: # Locks might take effect only after 10 minutes cache expiration for other
3934: # courses, and 2 minutes for current course
3935:
3936: my $envkey;
3937: if ($thisallowed=~/L/) {
3938: foreach $envkey (keys %env) {
3939: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3940: my $courseid=$2;
3941: my $roleid=$1.'.'.$2;
3942: $courseid=~s/^\///;
3943: my $expiretime=600;
3944: if ($env{'request.role'} eq $roleid) {
3945: $expiretime=120;
3946: }
3947: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3948: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3949: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3950: &coursedescription($courseid,{'freshen_cache' => 1});
3951: }
3952: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3953: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3954: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3955: &log($env{'user.domain'},$env{'user.name'},
3956: $env{'user.home'},
3957: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3958: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3959: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3960: return '';
3961: }
3962: }
3963: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3964: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3965: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3966: &log($env{'user.domain'},$env{'user.name'},
3967: $env{'user.home'},
3968: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3969: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3970: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3971: return '';
3972: }
3973: }
3974: }
3975: }
3976: }
3977:
3978: #
3979: # Rest of the restrictions depend on selected course
3980: #
3981:
3982: unless ($env{'request.course.id'}) {
3983: if ($thisallowed eq 'A') {
3984: return 'A';
3985: } elsif ($thisallowed eq 'B') {
3986: return 'B';
3987: } else {
3988: return '1';
3989: }
3990: }
3991:
3992: #
3993: # Now user is definitely in a course
3994: #
3995:
3996:
3997: # Course preferences
3998:
3999: if ($thisallowed=~/C/) {
4000: my $rolecode=(split(/\./,$env{'request.role'}))[0];
4001: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
4002: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
4003: =~/\Q$rolecode\E/) {
4004: if ($priv ne 'pch') {
4005: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
4006: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
4007: $env{'request.course.id'});
4008: }
4009: return '';
4010: }
4011:
4012: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
4013: =~/\Q$unamedom\E/) {
4014: if ($priv ne 'pch') {
4015: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
4016: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
4017: $env{'request.course.id'});
4018: }
4019: return '';
4020: }
4021: }
4022:
4023: # Resource preferences
4024:
4025: if ($thisallowed=~/R/) {
4026: my $rolecode=(split(/\./,$env{'request.role'}))[0];
4027: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
4028: if ($priv ne 'pch') {
4029: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
4030: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
4031: }
4032: return '';
4033: }
4034: }
4035:
4036: # Restricted by state or randomout?
4037:
4038: if ($thisallowed=~/X/) {
4039: if ($env{'acc.randomout'}) {
4040: if (!$symb) { $symb=&symbread($uri,1); }
4041: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
4042: return '';
4043: }
4044: }
4045: if (&condval($statecond)) {
4046: return '2';
4047: } else {
4048: return '';
4049: }
4050: }
4051:
4052: if ($thisallowed eq 'A') {
4053: return 'A';
4054: } elsif ($thisallowed eq 'B') {
4055: return 'B';
4056: }
4057: return 'F';
4058: }
4059:
4060: sub split_uri_for_cond {
4061: my $uri=&deversion(&declutter(shift));
4062: my @uriparts=split(/\//,$uri);
4063: my $filename=pop(@uriparts);
4064: my $pathname=join('/',@uriparts);
4065: return ($pathname,$filename);
4066: }
4067: # --------------------------------------------------- Is a resource on the map?
4068:
4069: sub is_on_map {
4070: my ($pathname,$filename) = &split_uri_for_cond(shift);
4071: #Trying to find the conditional for the file
4072: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
4073: /\&\Q$filename\E\:([\d\|]+)\&/);
4074: if ($match) {
4075: return (1,$1);
4076: } else {
4077: return (0,0);
4078: }
4079: }
4080:
4081: # --------------------------------------------------------- Get symb from alias
4082:
4083: sub get_symb_from_alias {
4084: my $symb=shift;
4085: my ($map,$resid,$url)=&decode_symb($symb);
4086: # Already is a symb
4087: if ($url) { return $symb; }
4088: # Must be an alias
4089: my $aliassymb='';
4090: my %bighash;
4091: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4092: &GDBM_READER(),0640)) {
4093: my $rid=$bighash{'mapalias_'.$symb};
4094: if ($rid) {
4095: my ($mapid,$resid)=split(/\./,$rid);
4096: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
4097: $resid,$bighash{'src_'.$rid});
4098: }
4099: untie %bighash;
4100: }
4101: return $aliassymb;
4102: }
4103:
4104: # ----------------------------------------------------------------- Define Role
4105:
4106: sub definerole {
4107: if (allowed('mcr','/')) {
4108: my ($rolename,$sysrole,$domrole,$courole)=@_;
4109: foreach my $role (split(':',$sysrole)) {
4110: my ($crole,$cqual)=split(/\&/,$role);
4111: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
4112: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
4113: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
4114: return "refused:s:$crole&$cqual";
4115: }
4116: }
4117: }
4118: foreach my $role (split(':',$domrole)) {
4119: my ($crole,$cqual)=split(/\&/,$role);
4120: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
4121: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
4122: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
4123: return "refused:d:$crole&$cqual";
4124: }
4125: }
4126: }
4127: foreach my $role (split(':',$courole)) {
4128: my ($crole,$cqual)=split(/\&/,$role);
4129: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
4130: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
4131: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
4132: return "refused:c:$crole&$cqual";
4133: }
4134: }
4135: }
4136: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4137: "$env{'user.domain'}:$env{'user.name'}:".
4138: "rolesdef_$rolename=".
4139: escape($sysrole.'_'.$domrole.'_'.$courole);
4140: return reply($command,$env{'user.home'});
4141: } else {
4142: return 'refused';
4143: }
4144: }
4145:
4146: # ---------------- Make a metadata query against the network of library servers
4147:
4148: sub metadata_query {
4149: my ($query,$custom,$customshow,$server_array)=@_;
4150: my %rhash;
4151: my @server_list = (defined($server_array) ? @$server_array
4152: : keys(%libserv) );
4153: for my $server (@server_list) {
4154: unless ($custom or $customshow) {
4155: my $reply=&reply("querysend:".&escape($query),$server);
4156: $rhash{$server}=$reply;
4157: }
4158: else {
4159: my $reply=&reply("querysend:".&escape($query).':'.
4160: &escape($custom).':'.&escape($customshow),
4161: $server);
4162: $rhash{$server}=$reply;
4163: }
4164: }
4165: return \%rhash;
4166: }
4167:
4168: # ----------------------------------------- Send log queries and wait for reply
4169:
4170: sub log_query {
4171: my ($uname,$udom,$query,%filters)=@_;
4172: my $uhome=&homeserver($uname,$udom);
4173: if ($uhome eq 'no_host') { return 'error: no_host'; }
4174: my $uhost=$hostname{$uhome};
4175: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys(%filters)));
4176: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
4177: $uhome);
4178: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
4179: return get_query_reply($queryid);
4180: }
4181:
4182: # -------------------------- Update MySQL table for portfolio file
4183:
4184: sub update_portfolio_table {
4185: my ($uname,$udom,$file_name,$query,$group,$action) = @_;
4186: my $homeserver = &homeserver($uname,$udom);
4187: my $queryid=
4188: &reply("querysend:".$query.':'.&escape($uname.':'.$udom.':'.$group).
4189: ':'.&escape($file_name).':'.$action,$homeserver);
4190: my $reply = &get_query_reply($queryid);
4191: return $reply;
4192: }
4193:
4194: # ------- Request retrieval of institutional classlists for course(s)
4195:
4196: sub fetch_enrollment_query {
4197: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
4198: my $homeserver;
4199: my $maxtries = 1;
4200: if ($context eq 'automated') {
4201: $homeserver = $perlvar{'lonHostID'};
4202: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
4203: } else {
4204: $homeserver = &homeserver($cnum,$dom);
4205: }
4206: my $host=$hostname{$homeserver};
4207: my $cmd = '';
4208: foreach my $affiliate (keys %{$affiliatesref}) {
4209: $cmd .= $affiliate.'='.join(",",@{$$affiliatesref{$affiliate}}).'%%';
4210: }
4211: $cmd =~ s/%%$//;
4212: $cmd = &escape($cmd);
4213: my $query = 'fetchenrollment';
4214: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
4215: unless ($queryid=~/^\Q$host\E\_/) {
4216: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
4217: return 'error: '.$queryid;
4218: }
4219: my $reply = &get_query_reply($queryid);
4220: my $tries = 1;
4221: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4222: $reply = &get_query_reply($queryid);
4223: $tries ++;
4224: }
4225: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4226: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4227: } else {
4228: my @responses = split/:/,$reply;
4229: if ($homeserver eq $perlvar{'lonHostID'}) {
4230: foreach my $line (@responses) {
4231: my ($key,$value) = split(/=/,$line,2);
4232: $$replyref{$key} = $value;
4233: }
4234: } else {
4235: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
4236: foreach my $line (@responses) {
4237: my ($key,$value) = split(/=/,$line);
4238: $$replyref{$key} = $value;
4239: if ($value > 0) {
4240: foreach my $item (@{$$affiliatesref{$key}}) {
4241: my $filename = $dom.'_'.$key.'_'.$item.'_classlist.xml';
4242: my $destname = $pathname.'/'.$filename;
4243: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
4244: if ($xml_classlist =~ /^error/) {
4245: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
4246: } else {
4247: if ( open(FILE,">$destname") ) {
4248: print FILE &unescape($xml_classlist);
4249: close(FILE);
4250: } else {
4251: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
4252: }
4253: }
4254: }
4255: }
4256: }
4257: }
4258: return 'ok';
4259: }
4260: return 'error';
4261: }
4262:
4263: sub get_query_reply {
4264: my $queryid=shift;
4265: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
4266: my $reply='';
4267: for (1..100) {
4268: sleep 2;
4269: if (-e $replyfile.'.end') {
4270: if (open(my $fh,$replyfile)) {
4271: $reply.=<$fh>;
4272: close($fh);
4273: } else { return 'error: reply_file_error'; }
4274: return &unescape($reply);
4275: }
4276: }
4277: return 'timeout:'.$queryid;
4278: }
4279:
4280: sub courselog_query {
4281: #
4282: # possible filters:
4283: # url: url or symb
4284: # username
4285: # domain
4286: # action: view, submit, grade
4287: # start: timestamp
4288: # end: timestamp
4289: #
4290: my (%filters)=@_;
4291: unless ($env{'request.course.id'}) { return 'no_course'; }
4292: if ($filters{'url'}) {
4293: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
4294: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
4295: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
4296: }
4297: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
4298: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
4299: return &log_query($cname,$cdom,'courselog',%filters);
4300: }
4301:
4302: sub userlog_query {
4303: my ($uname,$udom,%filters)=@_;
4304: return &log_query($uname,$udom,'userlog',%filters);
4305: }
4306:
4307: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
4308:
4309: sub auto_run {
4310: my ($cnum,$cdom) = @_;
4311: my $homeserver = &homeserver($cnum,$cdom);
4312: my $response = &reply('autorun:'.$cdom,$homeserver);
4313: return $response;
4314: }
4315:
4316: sub auto_get_sections {
4317: my ($cnum,$cdom,$inst_coursecode) = @_;
4318: my $homeserver = &homeserver($cnum,$cdom);
4319: my @secs = ();
4320: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
4321: unless ($response eq 'refused') {
4322: @secs = split/:/,$response;
4323: }
4324: return @secs;
4325: }
4326:
4327: sub auto_new_course {
4328: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
4329: my $homeserver = &homeserver($cnum,$cdom);
4330: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
4331: return $response;
4332: }
4333:
4334: sub auto_validate_courseID {
4335: my ($cnum,$cdom,$inst_course_id) = @_;
4336: my $homeserver = &homeserver($cnum,$cdom);
4337: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
4338: return $response;
4339: }
4340:
4341: sub auto_create_password {
4342: my ($cnum,$cdom,$authparam) = @_;
4343: my $homeserver = &homeserver($cnum,$cdom);
4344: my $create_passwd = 0;
4345: my $authchk = '';
4346: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
4347: if ($response eq 'refused') {
4348: $authchk = 'refused';
4349: } else {
4350: ($authparam,$create_passwd,$authchk) = split/:/,$response;
4351: }
4352: return ($authparam,$create_passwd,$authchk);
4353: }
4354:
4355: sub auto_photo_permission {
4356: my ($cnum,$cdom,$students) = @_;
4357: my $homeserver = &homeserver($cnum,$cdom);
4358: my ($outcome,$perm_reqd,$conditions) =
4359: split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
4360: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4361: return (undef,undef);
4362: }
4363: return ($outcome,$perm_reqd,$conditions);
4364: }
4365:
4366: sub auto_checkphotos {
4367: my ($uname,$udom,$pid) = @_;
4368: my $homeserver = &homeserver($uname,$udom);
4369: my ($result,$resulttype);
4370: my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
4371: &escape($uname).':'.&escape($pid),
4372: $homeserver));
4373: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4374: return (undef,undef);
4375: }
4376: if ($outcome) {
4377: ($result,$resulttype) = split(/:/,$outcome);
4378: }
4379: return ($result,$resulttype);
4380: }
4381:
4382: sub auto_photochoice {
4383: my ($cnum,$cdom) = @_;
4384: my $homeserver = &homeserver($cnum,$cdom);
4385: my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
4386: &escape($cdom),
4387: $homeserver)));
4388: if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4389: return (undef,undef);
4390: }
4391: return ($update,$comment);
4392: }
4393:
4394: sub auto_photoupdate {
4395: my ($affiliatesref,$dom,$cnum,$photo) = @_;
4396: my $homeserver = &homeserver($cnum,$dom);
4397: my $host=$hostname{$homeserver};
4398: my $cmd = '';
4399: my $maxtries = 1;
4400: foreach my $affiliate (keys(%{$affiliatesref})) {
4401: $cmd .= $affiliate.'='.join(",",@{$$affiliatesref{$affiliate}}).'%%';
4402: }
4403: $cmd =~ s/%%$//;
4404: $cmd = &escape($cmd);
4405: my $query = 'institutionalphotos';
4406: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
4407: unless ($queryid=~/^\Q$host\E\_/) {
4408: &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
4409: return 'error: '.$queryid;
4410: }
4411: my $reply = &get_query_reply($queryid);
4412: my $tries = 1;
4413: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4414: $reply = &get_query_reply($queryid);
4415: $tries ++;
4416: }
4417: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4418: &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4419: } else {
4420: my @responses = split(/:/,$reply);
4421: my $outcome = shift(@responses);
4422: foreach my $item (@responses) {
4423: my ($key,$value) = split(/=/,$item);
4424: $$photo{$key} = $value;
4425: }
4426: return $outcome;
4427: }
4428: return 'error';
4429: }
4430:
4431: sub auto_instcode_format {
4432: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,
4433: $cat_order) = @_;
4434: my $courses = '';
4435: my @homeservers;
4436: if ($caller eq 'global') {
4437: foreach my $tryserver (keys(%libserv)) {
4438: if ($hostdom{$tryserver} eq $codedom) {
4439: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4440: push(@homeservers,$tryserver);
4441: }
4442: }
4443: }
4444: } else {
4445: push(@homeservers,&homeserver($caller,$codedom));
4446: }
4447: foreach my $code (keys(%{$instcodes})) {
4448: $courses .= &escape($code).'='.&escape($$instcodes{$code}).'&';
4449: }
4450: chop($courses);
4451: my $ok_response = 0;
4452: my $response;
4453: while (@homeservers > 0 && $ok_response == 0) {
4454: my $server = shift(@homeservers);
4455: $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$server);
4456: if ($response !~ /(con_lost|error|no_such_host|refused)/) {
4457: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) =
4458: split/:/,$response;
4459: %{$codes} = (%{$codes},&str2hash($codes_str));
4460: push(@{$codetitles},&str2array($codetitles_str));
4461: %{$cat_titles} = (%{$cat_titles},&str2hash($cat_titles_str));
4462: %{$cat_order} = (%{$cat_order},&str2hash($cat_order_str));
4463: $ok_response = 1;
4464: }
4465: }
4466: if ($ok_response) {
4467: return 'ok';
4468: } else {
4469: return $response;
4470: }
4471: }
4472:
4473: sub auto_instcode_defaults {
4474: my ($domain,$returnhash,$code_order) = @_;
4475: my @homeservers;
4476: foreach my $tryserver (keys(%libserv)) {
4477: if ($hostdom{$tryserver} eq $domain) {
4478: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4479: push(@homeservers,$tryserver);
4480: }
4481: }
4482: }
4483: my $ok_response = 0;
4484: my $response;
4485: while (@homeservers > 0 && $ok_response == 0) {
4486: my $server = shift(@homeservers);
4487: $response=&reply('autoinstcodedefaults:'.$domain,$server);
4488: if ($response !~ /(con_lost|error|no_such_host|refused)/) {
4489: foreach my $pair (split(/\&/,$response)) {
4490: my ($name,$value)=split(/\=/,$pair);
4491: if ($name eq 'code_order') {
4492: @{$code_order} = split(/\&/,&unescape($value));
4493: } else {
4494: $returnhash->{&unescape($name)}=&unescape($value);
4495: }
4496: }
4497: $ok_response = 1;
4498: }
4499: }
4500: if ($ok_response) {
4501: return 'ok';
4502: } else {
4503: return $response;
4504: }
4505: }
4506:
4507: sub auto_validate_class_sec {
4508: my ($cdom,$cnum,$owner,$inst_class) = @_;
4509: my $homeserver = &homeserver($cnum,$cdom);
4510: my $response=&reply('autovalidateclass_sec:'.$inst_class.':'.
4511: &escape($owner).':'.$cdom,$homeserver);
4512: return $response;
4513: }
4514:
4515: # ------------------------------------------------------- Course Group routines
4516:
4517: sub get_coursegroups {
4518: my ($cdom,$cnum,$group,$namespace) = @_;
4519: return(&dump($namespace,$cdom,$cnum,$group));
4520: }
4521:
4522: sub modify_coursegroup {
4523: my ($cdom,$cnum,$groupsettings) = @_;
4524: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
4525: }
4526:
4527: sub toggle_coursegroup_status {
4528: my ($cdom,$cnum,$group,$action) = @_;
4529: my ($from_namespace,$to_namespace);
4530: if ($action eq 'delete') {
4531: $from_namespace = 'coursegroups';
4532: $to_namespace = 'deleted_groups';
4533: } else {
4534: $from_namespace = 'deleted_groups';
4535: $to_namespace = 'coursegroups';
4536: }
4537: my %curr_group = &get_coursegroups($cdom,$cnum,$group,$from_namespace);
4538: if (my $tmp = &error(%curr_group)) {
4539: &Apache::lonnet::logthis('Error retrieving group: '.$tmp.' in '.$cnum.':'.$cdom);
4540: return ('read error',$tmp);
4541: } else {
4542: my %savedsettings = %curr_group;
4543: my $result = &put($to_namespace,\%savedsettings,$cdom,$cnum);
4544: my $deloutcome;
4545: if ($result eq 'ok') {
4546: $deloutcome = &del($from_namespace,[$group],$cdom,$cnum);
4547: } else {
4548: return ('write error',$result);
4549: }
4550: if ($deloutcome eq 'ok') {
4551: return 'ok';
4552: } else {
4553: return ('delete error',$deloutcome);
4554: }
4555: }
4556: }
4557:
4558: sub modify_group_roles {
4559: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
4560: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
4561: my $role = 'gr/'.&escape($userprivs);
4562: my ($uname,$udom) = split(/:/,$user);
4563: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
4564: if ($result eq 'ok') {
4565: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
4566: }
4567: return $result;
4568: }
4569:
4570: sub modify_coursegroup_membership {
4571: my ($cdom,$cnum,$membership) = @_;
4572: my $result = &put('groupmembership',$membership,$cdom,$cnum);
4573: return $result;
4574: }
4575:
4576: sub get_active_groups {
4577: my ($udom,$uname,$cdom,$cnum) = @_;
4578: my $now = time;
4579: my %groups = ();
4580: foreach my $key (keys(%env)) {
4581: if ($key =~ m-user\.role\.gr\./($match_domain)/($match_courseid)/(\w+)$-) {
4582: my ($start,$end) = split(/\./,$env{$key});
4583: if (($end!=0) && ($end<$now)) { next; }
4584: if (($start!=0) && ($start>$now)) { next; }
4585: if ($1 eq $cdom && $2 eq $cnum) {
4586: $groups{$3} = $env{$key} ;
4587: }
4588: }
4589: }
4590: return %groups;
4591: }
4592:
4593: sub get_group_membership {
4594: my ($cdom,$cnum,$group) = @_;
4595: return(&dump('groupmembership',$cdom,$cnum,$group));
4596: }
4597:
4598: sub get_users_groups {
4599: my ($udom,$uname,$courseid) = @_;
4600: my @usersgroups;
4601: my $cachetime=1800;
4602:
4603: my $hashid="$udom:$uname:$courseid";
4604: my ($grouplist,$cached)=&is_cached_new('getgroups',$hashid);
4605: if (defined($cached)) {
4606: @usersgroups = split(/:/,$grouplist);
4607: } else {
4608: $grouplist = '';
4609: my $courseurl = &courseid_to_courseurl($courseid);
4610: my %roleshash = &dump('roles',$udom,$uname,$courseurl);
4611: my $access_end = $env{'course.'.$courseid.
4612: '.default_enrollment_end_date'};
4613: my $now = time;
4614: foreach my $key (keys(%roleshash)) {
4615: if ($key =~ /^\Q$courseurl\E\/(\w+)\_gr$/) {
4616: my $group = $1;
4617: if ($roleshash{$key} =~ /_(\d+)_(\d+)$/) {
4618: my $start = $2;
4619: my $end = $1;
4620: if ($start == -1) { next; } # deleted from group
4621: if (($start!=0) && ($start>$now)) { next; }
4622: if (($end!=0) && ($end<$now)) {
4623: if ($access_end && $access_end < $now) {
4624: if ($access_end - $end < 86400) {
4625: push(@usersgroups,$group);
4626: }
4627: }
4628: next;
4629: }
4630: push(@usersgroups,$group);
4631: }
4632: }
4633: }
4634: @usersgroups = &sort_course_groups($courseid,@usersgroups);
4635: $grouplist = join(':',@usersgroups);
4636: &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
4637: }
4638: return @usersgroups;
4639: }
4640:
4641: sub devalidate_getgroups_cache {
4642: my ($udom,$uname,$cdom,$cnum)=@_;
4643: my $courseid = $cdom.'_'.$cnum;
4644:
4645: my $hashid="$udom:$uname:$courseid";
4646: &devalidate_cache_new('getgroups',$hashid);
4647: }
4648:
4649: # ------------------------------------------------------------------ Plain Text
4650:
4651: sub plaintext {
4652: my ($short,$type,$cid) = @_;
4653: if ($short =~ /^cr/) {
4654: return (split('/',$short))[-1];
4655: }
4656: if (!defined($cid)) {
4657: $cid = $env{'request.course.id'};
4658: }
4659: if (defined($cid) && defined($env{'course.'.$cid.'.'.$short.'.plaintext'})) {
4660: return &Apache::lonlocal::mt($env{'course.'.$cid.'.'.$short.
4661: '.plaintext'});
4662: }
4663: my %rolenames = (
4664: Course => 'std',
4665: Group => 'alt1',
4666: );
4667: if (defined($type) &&
4668: defined($rolenames{$type}) &&
4669: defined($prp{$short}{$rolenames{$type}})) {
4670: return &Apache::lonlocal::mt($prp{$short}{$rolenames{$type}});
4671: } else {
4672: return &Apache::lonlocal::mt($prp{$short}{'std'});
4673: }
4674: }
4675:
4676: # ----------------------------------------------------------------- Assign Role
4677:
4678: sub assignrole {
4679: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
4680: my $mrole;
4681: if ($role =~ /^cr\//) {
4682: my $cwosec=$url;
4683: $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
4684: unless (&allowed('ccr',$cwosec)) {
4685: &logthis('Refused custom assignrole: '.
4686: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4687: $env{'user.name'}.' at '.$env{'user.domain'});
4688: return 'refused';
4689: }
4690: $mrole='cr';
4691: } elsif ($role =~ /^gr\//) {
4692: my $cwogrp=$url;
4693: $cwogrp=~s{^/($match_domain)/($match_courseid)/.*}{$1/$2};
4694: unless (&allowed('mdg',$cwogrp)) {
4695: &logthis('Refused group assignrole: '.
4696: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4697: $env{'user.name'}.' at '.$env{'user.domain'});
4698: return 'refused';
4699: }
4700: $mrole='gr';
4701: } else {
4702: my $cwosec=$url;
4703: $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
4704: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
4705: &logthis('Refused assignrole: '.
4706: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4707: $env{'user.name'}.' at '.$env{'user.domain'});
4708: return 'refused';
4709: }
4710: $mrole=$role;
4711: }
4712: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4713: "$udom:$uname:$url".'_'."$mrole=$role";
4714: if ($end) { $command.='_'.$end; }
4715: if ($start) {
4716: if ($end) {
4717: $command.='_'.$start;
4718: } else {
4719: $command.='_0_'.$start;
4720: }
4721: }
4722: my $origstart = $start;
4723: my $origend = $end;
4724: # actually delete
4725: if ($deleteflag) {
4726: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
4727: # modify command to delete the role
4728: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
4729: "$udom:$uname:$url".'_'."$mrole";
4730: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
4731: # set start and finish to negative values for userrolelog
4732: $start=-1;
4733: $end=-1;
4734: }
4735: }
4736: # send command
4737: my $answer=&reply($command,&homeserver($uname,$udom));
4738: # log new user role if status is ok
4739: if ($answer eq 'ok') {
4740: &userrolelog($role,$uname,$udom,$url,$start,$end);
4741: # for course roles, perform group memberships changes triggered by role change.
4742: unless ($role =~ /^gr/) {
4743: &Apache::longroup::group_changes($udom,$uname,$url,$role,$origend,
4744: $origstart);
4745: }
4746: }
4747: return $answer;
4748: }
4749:
4750: # -------------------------------------------------- Modify user authentication
4751: # Overrides without validation
4752:
4753: sub modifyuserauth {
4754: my ($udom,$uname,$umode,$upass)=@_;
4755: my $uhome=&homeserver($uname,$udom);
4756: unless (&allowed('mau',$udom)) { return 'refused'; }
4757: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
4758: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4759: ' in domain '.$env{'request.role.domain'});
4760: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
4761: &escape($upass),$uhome);
4762: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
4763: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
4764: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4765: &log($udom,,$uname,$uhome,
4766: 'Authentication changed by '.$env{'user.domain'}.', '.
4767: $env{'user.name'}.', '.$umode.
4768: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4769: unless ($reply eq 'ok') {
4770: &logthis('Authentication mode error: '.$reply);
4771: return 'error: '.$reply;
4772: }
4773: return 'ok';
4774: }
4775:
4776: # --------------------------------------------------------------- Modify a user
4777:
4778: sub modifyuser {
4779: my ($udom, $uname, $uid,
4780: $umode, $upass, $first,
4781: $middle, $last, $gene,
4782: $forceid, $desiredhome, $email)=@_;
4783: $udom= &LONCAPA::clean_domain($udom);
4784: $uname=&LONCAPA::clean_username($uname);
4785: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
4786: $umode.', '.$first.', '.$middle.', '.
4787: $last.', '.$gene.'(forceid: '.$forceid.')'.
4788: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
4789: ' desiredhome not specified').
4790: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4791: ' in domain '.$env{'request.role.domain'});
4792: my $uhome=&homeserver($uname,$udom,'true');
4793: # ----------------------------------------------------------------- Create User
4794: if (($uhome eq 'no_host') &&
4795: (($umode && $upass) || ($umode eq 'localauth'))) {
4796: my $unhome='';
4797: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
4798: $unhome = $desiredhome;
4799: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
4800: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
4801: } else { # load balancing routine for determining $unhome
4802: my $tryserver;
4803: my $loadm=10000000;
4804: foreach $tryserver (keys %libserv) {
4805: if ($hostdom{$tryserver} eq $udom) {
4806: my $answer=reply('load',$tryserver);
4807: if (($answer=~/\d+/) && ($answer<$loadm)) {
4808: $loadm=$answer;
4809: $unhome=$tryserver;
4810: }
4811: }
4812: }
4813: }
4814: if (($unhome eq '') || ($unhome eq 'no_host')) {
4815: return 'error: unable to find a home server for '.$uname.
4816: ' in domain '.$udom;
4817: }
4818: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
4819: &escape($upass),$unhome);
4820: unless ($reply eq 'ok') {
4821: return 'error: '.$reply;
4822: }
4823: $uhome=&homeserver($uname,$udom,'true');
4824: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
4825: return 'error: unable verify users home machine.';
4826: }
4827: } # End of creation of new user
4828: # ---------------------------------------------------------------------- Add ID
4829: if ($uid) {
4830: $uid=~tr/A-Z/a-z/;
4831: my %uidhash=&idrget($udom,$uname);
4832: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
4833: && (!$forceid)) {
4834: unless ($uid eq $uidhash{$uname}) {
4835: return 'error: user id "'.$uid.'" does not match '.
4836: 'current user id "'.$uidhash{$uname}.'".';
4837: }
4838: } else {
4839: &idput($udom,($uname => $uid));
4840: }
4841: }
4842: # -------------------------------------------------------------- Add names, etc
4843: my @tmp=&get('environment',
4844: ['firstname','middlename','lastname','generation'],
4845: $udom,$uname);
4846: my %names;
4847: if ($tmp[0] =~ m/^error:.*/) {
4848: %names=();
4849: } else {
4850: %names = @tmp;
4851: }
4852: #
4853: # Make sure to not trash student environment if instructor does not bother
4854: # to supply name and email information
4855: #
4856: if ($first) { $names{'firstname'} = $first; }
4857: if (defined($middle)) { $names{'middlename'} = $middle; }
4858: if ($last) { $names{'lastname'} = $last; }
4859: if (defined($gene)) { $names{'generation'} = $gene; }
4860: if ($email) {
4861: $email=~s/[^\w\@\.\-\,]//gs;
4862: if ($email=~/\@/) { $names{'notification'} = $email;
4863: $names{'critnotification'} = $email;
4864: $names{'permanentemail'} = $email; }
4865: }
4866: my $reply = &put('environment', \%names, $udom,$uname);
4867: if ($reply ne 'ok') { return 'error: '.$reply; }
4868: &devalidate_cache_new('namescache',$uname.':'.$udom);
4869: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
4870: $umode.', '.$first.', '.$middle.', '.
4871: $last.', '.$gene.' by '.
4872: $env{'user.name'}.' at '.$env{'user.domain'});
4873: return 'ok';
4874: }
4875:
4876: # -------------------------------------------------------------- Modify student
4877:
4878: sub modifystudent {
4879: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
4880: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
4881: if (!$cid) {
4882: unless ($cid=$env{'request.course.id'}) {
4883: return 'not_in_class';
4884: }
4885: }
4886: # --------------------------------------------------------------- Make the user
4887: my $reply=&modifyuser
4888: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
4889: $desiredhome,$email);
4890: unless ($reply eq 'ok') { return $reply; }
4891: # This will cause &modify_student_enrollment to get the uid from the
4892: # students environment
4893: $uid = undef if (!$forceid);
4894: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
4895: $gene,$usec,$end,$start,$type,$locktype,$cid);
4896: return $reply;
4897: }
4898:
4899: sub modify_student_enrollment {
4900: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
4901: my ($cdom,$cnum,$chome);
4902: if (!$cid) {
4903: unless ($cid=$env{'request.course.id'}) {
4904: return 'not_in_class';
4905: }
4906: $cdom=$env{'course.'.$cid.'.domain'};
4907: $cnum=$env{'course.'.$cid.'.num'};
4908: } else {
4909: ($cdom,$cnum)=split(/_/,$cid);
4910: }
4911: $chome=$env{'course.'.$cid.'.home'};
4912: if (!$chome) {
4913: $chome=&homeserver($cnum,$cdom);
4914: }
4915: if (!$chome) { return 'unknown_course'; }
4916: # Make sure the user exists
4917: my $uhome=&homeserver($uname,$udom);
4918: if (($uhome eq '') || ($uhome eq 'no_host')) {
4919: return 'error: no such user';
4920: }
4921: # Get student data if we were not given enough information
4922: if (!defined($first) || $first eq '' ||
4923: !defined($last) || $last eq '' ||
4924: !defined($uid) || $uid eq '' ||
4925: !defined($middle) || $middle eq '' ||
4926: !defined($gene) || $gene eq '') {
4927: # They did not supply us with enough data to enroll the student, so
4928: # we need to pick up more information.
4929: my %tmp = &get('environment',
4930: ['firstname','middlename','lastname', 'generation','id']
4931: ,$udom,$uname);
4932:
4933: #foreach my $key (keys(%tmp)) {
4934: # &logthis("key $key = ".$tmp{$key});
4935: #}
4936: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
4937: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
4938: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
4939: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
4940: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
4941: }
4942: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
4943: my $reply=cput('classlist',
4944: {"$uname:$udom" =>
4945: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
4946: $cdom,$cnum);
4947: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
4948: return 'error: '.$reply;
4949: } else {
4950: &devalidate_getsection_cache($udom,$uname,$cid);
4951: }
4952: # Add student role to user
4953: my $uurl='/'.$cid;
4954: $uurl=~s/\_/\//g;
4955: if ($usec) {
4956: $uurl.='/'.$usec;
4957: }
4958: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
4959: }
4960:
4961: sub format_name {
4962: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
4963: my $name;
4964: if ($first ne 'lastname') {
4965: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
4966: } else {
4967: if ($lastname=~/\S/) {
4968: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
4969: $name=~s/\s+,/,/;
4970: } else {
4971: $name.= $firstname.' '.$middlename.' '.$generation;
4972: }
4973: }
4974: $name=~s/^\s+//;
4975: $name=~s/\s+$//;
4976: $name=~s/\s+/ /g;
4977: return $name;
4978: }
4979:
4980: # ------------------------------------------------- Write to course preferences
4981:
4982: sub writecoursepref {
4983: my ($courseid,%prefs)=@_;
4984: $courseid=~s/^\///;
4985: $courseid=~s/\_/\//g;
4986: my ($cdomain,$cnum)=split(/\//,$courseid);
4987: my $chome=homeserver($cnum,$cdomain);
4988: if (($chome eq '') || ($chome eq 'no_host')) {
4989: return 'error: no such course';
4990: }
4991: my $cstring='';
4992: foreach my $pref (keys(%prefs)) {
4993: $cstring.=&escape($pref).'='.&escape($prefs{$pref}).'&';
4994: }
4995: $cstring=~s/\&$//;
4996: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
4997: }
4998:
4999: # ---------------------------------------------------------- Make/modify course
5000:
5001: sub createcourse {
5002: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,
5003: $course_owner,$crstype)=@_;
5004: $url=&declutter($url);
5005: my $cid='';
5006: unless (&allowed('ccc',$udom)) {
5007: return 'refused';
5008: }
5009: # ------------------------------------------------------------------- Create ID
5010: my $uname=int(1+rand(9)).
5011: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
5012: substr($$.time,0,5).unpack("H8",pack("I32",time)).
5013: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
5014: # ----------------------------------------------- Make sure that does not exist
5015: my $uhome=&homeserver($uname,$udom,'true');
5016: unless (($uhome eq '') || ($uhome eq 'no_host')) {
5017: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
5018: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
5019: $uhome=&homeserver($uname,$udom,'true');
5020: unless (($uhome eq '') || ($uhome eq 'no_host')) {
5021: return 'error: unable to generate unique course-ID';
5022: }
5023: }
5024: # ------------------------------------------------ Check supplied server name
5025: $course_server = $env{'user.homeserver'} if (! defined($course_server));
5026: if (! exists($libserv{$course_server})) {
5027: return 'error:bad server name '.$course_server;
5028: }
5029: # ------------------------------------------------------------- Make the course
5030: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
5031: $course_server);
5032: unless ($reply eq 'ok') { return 'error: '.$reply; }
5033: $uhome=&homeserver($uname,$udom,'true');
5034: if (($uhome eq '') || ($uhome eq 'no_host')) {
5035: return 'error: no such course';
5036: }
5037: # ----------------------------------------------------------------- Course made
5038: # log existence
5039: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
5040: ':'.&escape($inst_code).':'.&escape($course_owner).':'.
5041: &escape($crstype),$uhome);
5042: &flushcourselogs();
5043: # set toplevel url
5044: my $topurl=$url;
5045: unless ($nonstandard) {
5046: # ------------------------------------------ For standard courses, make top url
5047: my $mapurl=&clutter($url);
5048: if ($mapurl eq '/res/') { $mapurl=''; }
5049: $env{'form.initmap'}=(<<ENDINITMAP);
5050: <map>
5051: <resource id="1" type="start"></resource>
5052: <resource id="2" src="$mapurl"></resource>
5053: <resource id="3" type="finish"></resource>
5054: <link index="1" from="1" to="2"></link>
5055: <link index="2" from="2" to="3"></link>
5056: </map>
5057: ENDINITMAP
5058: $topurl=&declutter(
5059: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
5060: );
5061: }
5062: # ----------------------------------------------------------- Write preferences
5063: &writecoursepref($udom.'_'.$uname,
5064: ('description' => $description,
5065: 'url' => $topurl));
5066: return '/'.$udom.'/'.$uname;
5067: }
5068:
5069: sub is_course {
5070: my ($cdom,$cnum) = @_;
5071: my %courses = &courseiddump($cdom,'.',1,'.','.',$cnum,undef,
5072: undef,'.');
5073: if (exists($courses{$cdom.'_'.$cnum})) {
5074: return 1;
5075: }
5076: return 0;
5077: }
5078:
5079: # ---------------------------------------------------------- Assign Custom Role
5080:
5081: sub assigncustomrole {
5082: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
5083: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
5084: $end,$start,$deleteflag);
5085: }
5086:
5087: # ----------------------------------------------------------------- Revoke Role
5088:
5089: sub revokerole {
5090: my ($udom,$uname,$url,$role,$deleteflag)=@_;
5091: my $now=time;
5092: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
5093: }
5094:
5095: # ---------------------------------------------------------- Revoke Custom Role
5096:
5097: sub revokecustomrole {
5098: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
5099: my $now=time;
5100: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
5101: $deleteflag);
5102: }
5103:
5104: # ------------------------------------------------------------ Disk usage
5105: sub diskusage {
5106: my ($udom,$uname,$directoryRoot)=@_;
5107: $directoryRoot =~ s/\/$//;
5108: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
5109: return $listing;
5110: }
5111:
5112: sub is_locked {
5113: my ($file_name, $domain, $user) = @_;
5114: my @check;
5115: my $is_locked;
5116: push @check, $file_name;
5117: my %locked = &get('file_permissions',\@check,
5118: $env{'user.domain'},$env{'user.name'});
5119: my ($tmp)=keys(%locked);
5120: if ($tmp=~/^error:/) { undef(%locked); }
5121:
5122: if (ref($locked{$file_name}) eq 'ARRAY') {
5123: $is_locked = 'false';
5124: foreach my $entry (@{$locked{$file_name}}) {
5125: if (ref($entry) eq 'ARRAY') {
5126: $is_locked = 'true';
5127: last;
5128: }
5129: }
5130: } else {
5131: $is_locked = 'false';
5132: }
5133: }
5134:
5135: sub declutter_portfile {
5136: my ($file) = @_;
5137: $file =~ s{^(/portfolio/|portfolio/)}{/};
5138: return $file;
5139: }
5140:
5141: # ------------------------------------------------------------- Mark as Read Only
5142:
5143: sub mark_as_readonly {
5144: my ($domain,$user,$files,$what) = @_;
5145: my %current_permissions = &dump('file_permissions',$domain,$user);
5146: my ($tmp)=keys(%current_permissions);
5147: if ($tmp=~/^error:/) { undef(%current_permissions); }
5148: foreach my $file (@{$files}) {
5149: $file = &declutter_portfile($file);
5150: push(@{$current_permissions{$file}},$what);
5151: }
5152: &put('file_permissions',\%current_permissions,$domain,$user);
5153: return;
5154: }
5155:
5156: # ------------------------------------------------------------Save Selected Files
5157:
5158: sub save_selected_files {
5159: my ($user, $path, @files) = @_;
5160: my $filename = $user."savedfiles";
5161: my @other_files = &files_not_in_path($user, $path);
5162: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5163: foreach my $file (@files) {
5164: print (OUT $env{'form.currentpath'}.$file."\n");
5165: }
5166: foreach my $file (@other_files) {
5167: print (OUT $file."\n");
5168: }
5169: close (OUT);
5170: return 'ok';
5171: }
5172:
5173: sub clear_selected_files {
5174: my ($user) = @_;
5175: my $filename = $user."savedfiles";
5176: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5177: print (OUT undef);
5178: close (OUT);
5179: return ("ok");
5180: }
5181:
5182: sub files_in_path {
5183: my ($user, $path) = @_;
5184: my $filename = $user."savedfiles";
5185: my %return_files;
5186: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5187: while (my $line_in = <IN>) {
5188: chomp ($line_in);
5189: my @paths_and_file = split (m!/!, $line_in);
5190: my $file_part = pop (@paths_and_file);
5191: my $path_part = join ('/', @paths_and_file);
5192: $path_part.='/';
5193: my $path_and_file = $path_part.$file_part;
5194: if ($path_part eq $path) {
5195: $return_files{$file_part}= 'selected';
5196: }
5197: }
5198: close (IN);
5199: return (\%return_files);
5200: }
5201:
5202: # called in portfolio select mode, to show files selected NOT in current directory
5203: sub files_not_in_path {
5204: my ($user, $path) = @_;
5205: my $filename = $user."savedfiles";
5206: my @return_files;
5207: my $path_part;
5208: open(IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5209: while (my $line = <IN>) {
5210: #ok, I know it's clunky, but I want it to work
5211: my @paths_and_file = split(m|/|, $line);
5212: my $file_part = pop(@paths_and_file);
5213: chomp($file_part);
5214: my $path_part = join('/', @paths_and_file);
5215: $path_part .= '/';
5216: my $path_and_file = $path_part.$file_part;
5217: if ($path_part ne $path) {
5218: push(@return_files, ($path_and_file));
5219: }
5220: }
5221: close(OUT);
5222: return (@return_files);
5223: }
5224:
5225: #----------------------------------------------Get portfolio file permissions
5226:
5227: sub get_portfile_permissions {
5228: my ($domain,$user) = @_;
5229: my %current_permissions = &dump('file_permissions',$domain,$user);
5230: my ($tmp)=keys(%current_permissions);
5231: if ($tmp=~/^error:/) { undef(%current_permissions); }
5232: return \%current_permissions;
5233: }
5234:
5235: #---------------------------------------------Get portfolio file access controls
5236:
5237: sub get_access_controls {
5238: my ($current_permissions,$group,$file) = @_;
5239: my %access;
5240: my $real_file = $file;
5241: $file =~ s/\.meta$//;
5242: if (defined($file)) {
5243: if (ref($$current_permissions{$file."\0".'accesscontrol'}) eq 'HASH') {
5244: foreach my $control (keys(%{$$current_permissions{$file."\0".'accesscontrol'}})) {
5245: $access{$real_file}{$control} = $$current_permissions{$file."\0".$control};
5246: }
5247: }
5248: } else {
5249: foreach my $key (keys(%{$current_permissions})) {
5250: if ($key =~ /\0accesscontrol$/) {
5251: if (defined($group)) {
5252: if ($key !~ m-^\Q$group\E/-) {
5253: next;
5254: }
5255: }
5256: my ($fullpath) = split(/\0/,$key);
5257: if (ref($$current_permissions{$key}) eq 'HASH') {
5258: foreach my $control (keys(%{$$current_permissions{$key}})) {
5259: $access{$fullpath}{$control}=$$current_permissions{$fullpath."\0".$control};
5260: }
5261: }
5262: }
5263: }
5264: }
5265: return %access;
5266: }
5267:
5268: sub modify_access_controls {
5269: my ($file_name,$changes,$domain,$user)=@_;
5270: my ($outcome,$deloutcome);
5271: my %store_permissions;
5272: my %new_values;
5273: my %new_control;
5274: my %translation;
5275: my @deletions = ();
5276: my $now = time;
5277: if (exists($$changes{'activate'})) {
5278: if (ref($$changes{'activate'}) eq 'HASH') {
5279: my @newitems = sort(keys(%{$$changes{'activate'}}));
5280: my $numnew = scalar(@newitems);
5281: for (my $i=0; $i<$numnew; $i++) {
5282: my $newkey = $newitems[$i];
5283: my $newid = &Apache::loncommon::get_cgi_id();
5284: if ($newkey =~ /^\d+:/) {
5285: $newkey =~ s/^(\d+)/$newid/;
5286: $translation{$1} = $newid;
5287: } elsif ($newkey =~ /^\d+_\d+_\d+:/) {
5288: $newkey =~ s/^(\d+_\d+_\d+)/$newid/;
5289: $translation{$1} = $newid;
5290: }
5291: $new_values{$file_name."\0".$newkey} =
5292: $$changes{'activate'}{$newitems[$i]};
5293: $new_control{$newkey} = $now;
5294: }
5295: }
5296: }
5297: my %todelete;
5298: my %changed_items;
5299: foreach my $action ('delete','update') {
5300: if (exists($$changes{$action})) {
5301: if (ref($$changes{$action}) eq 'HASH') {
5302: foreach my $key (keys(%{$$changes{$action}})) {
5303: my ($itemnum) = ($key =~ /^([^:]+):/);
5304: if ($action eq 'delete') {
5305: $todelete{$itemnum} = 1;
5306: } else {
5307: $changed_items{$itemnum} = $key;
5308: }
5309: }
5310: }
5311: }
5312: }
5313: # get lock on access controls for file.
5314: my $lockhash = {
5315: $file_name."\0".'locked_access_records' => $env{'user.name'}.
5316: ':'.$env{'user.domain'},
5317: };
5318: my $tries = 0;
5319: my $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5320:
5321: while (($gotlock ne 'ok') && $tries <3) {
5322: $tries ++;
5323: sleep 1;
5324: $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5325: }
5326: if ($gotlock eq 'ok') {
5327: my %curr_permissions = &dump('file_permissions',$domain,$user,$file_name);
5328: my ($tmp)=keys(%curr_permissions);
5329: if ($tmp=~/^error:/) { undef(%curr_permissions); }
5330: if (exists($curr_permissions{$file_name."\0".'accesscontrol'})) {
5331: my $curr_controls = $curr_permissions{$file_name."\0".'accesscontrol'};
5332: if (ref($curr_controls) eq 'HASH') {
5333: foreach my $control_item (keys(%{$curr_controls})) {
5334: my ($itemnum) = ($control_item =~ /^([^:]+):/);
5335: if (defined($todelete{$itemnum})) {
5336: push(@deletions,$file_name."\0".$control_item);
5337: } else {
5338: if (defined($changed_items{$itemnum})) {
5339: $new_control{$changed_items{$itemnum}} = $now;
5340: push(@deletions,$file_name."\0".$control_item);
5341: $new_values{$file_name."\0".$changed_items{$itemnum}} = $$changes{'update'}{$changed_items{$itemnum}};
5342: } else {
5343: $new_control{$control_item} = $$curr_controls{$control_item};
5344: }
5345: }
5346: }
5347: }
5348: }
5349: $deloutcome = &del('file_permissions',\@deletions,$domain,$user);
5350: $new_values{$file_name."\0".'accesscontrol'} = \%new_control;
5351: $outcome = &put('file_permissions',\%new_values,$domain,$user);
5352: # remove lock
5353: my @del_lock = ($file_name."\0".'locked_access_records');
5354: my $dellockoutcome = &del('file_permissions',\@del_lock,$domain,$user);
5355: my ($file,$group);
5356: if (&is_course($domain,$user)) {
5357: ($group,$file) = split(/\//,$file_name,2);
5358: } else {
5359: $file = $file_name;
5360: }
5361: my $sqlresult =
5362: &update_portfolio_table($user,$domain,$file,'portfolio_access',
5363: $group);
5364: } else {
5365: $outcome = "error: could not obtain lockfile\n";
5366: }
5367: return ($outcome,$deloutcome,\%new_values,\%translation);
5368: }
5369:
5370: sub make_public_indefinitely {
5371: my ($requrl) = @_;
5372: my $now = time;
5373: my $action = 'activate';
5374: my $aclnum = 0;
5375: if (&is_portfolio_url($requrl)) {
5376: my (undef,$udom,$unum,$file_name,$group) =
5377: &parse_portfolio_url($requrl);
5378: my $current_perms = &get_portfile_permissions($udom,$unum);
5379: my %access_controls = &get_access_controls($current_perms,
5380: $group,$file_name);
5381: foreach my $key (keys(%{$access_controls{$file_name}})) {
5382: my ($num,$scope,$end,$start) =
5383: ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
5384: if ($scope eq 'public') {
5385: if ($start <= $now && $end == 0) {
5386: $action = 'none';
5387: } else {
5388: $action = 'update';
5389: $aclnum = $num;
5390: }
5391: last;
5392: }
5393: }
5394: if ($action eq 'none') {
5395: return 'ok';
5396: } else {
5397: my %changes;
5398: my $newend = 0;
5399: my $newstart = $now;
5400: my $newkey = $aclnum.':public_'.$newend.'_'.$newstart;
5401: $changes{$action}{$newkey} = {
5402: type => 'public',
5403: time => {
5404: start => $newstart,
5405: end => $newend,
5406: },
5407: };
5408: my ($outcome,$deloutcome,$new_values,$translation) =
5409: &modify_access_controls($file_name,\%changes,$udom,$unum);
5410: return $outcome;
5411: }
5412: } else {
5413: return 'invalid';
5414: }
5415: }
5416:
5417: #------------------------------------------------------Get Marked as Read Only
5418:
5419: sub get_marked_as_readonly {
5420: my ($domain,$user,$what,$group) = @_;
5421: my $current_permissions = &get_portfile_permissions($domain,$user);
5422: my @readonly_files;
5423: my $cmp1=$what;
5424: if (ref($what)) { $cmp1=join('',@{$what}) };
5425: while (my ($file_name,$value) = each(%{$current_permissions})) {
5426: if (defined($group)) {
5427: if ($file_name !~ m-^\Q$group\E/-) {
5428: next;
5429: }
5430: }
5431: if (ref($value) eq "ARRAY"){
5432: foreach my $stored_what (@{$value}) {
5433: my $cmp2=$stored_what;
5434: if (ref($stored_what) eq 'ARRAY') {
5435: $cmp2=join('',@{$stored_what});
5436: }
5437: if ($cmp1 eq $cmp2) {
5438: push(@readonly_files, $file_name);
5439: last;
5440: } elsif (!defined($what)) {
5441: push(@readonly_files, $file_name);
5442: last;
5443: }
5444: }
5445: }
5446: }
5447: return @readonly_files;
5448: }
5449: #-----------------------------------------------------------Get Marked as Read Only Hash
5450:
5451: sub get_marked_as_readonly_hash {
5452: my ($current_permissions,$group,$what) = @_;
5453: my %readonly_files;
5454: while (my ($file_name,$value) = each(%{$current_permissions})) {
5455: if (defined($group)) {
5456: if ($file_name !~ m-^\Q$group\E/-) {
5457: next;
5458: }
5459: }
5460: if (ref($value) eq "ARRAY"){
5461: foreach my $stored_what (@{$value}) {
5462: if (ref($stored_what) eq 'ARRAY') {
5463: foreach my $lock_descriptor(@{$stored_what}) {
5464: if ($lock_descriptor eq 'graded') {
5465: $readonly_files{$file_name} = 'graded';
5466: } elsif ($lock_descriptor eq 'handback') {
5467: $readonly_files{$file_name} = 'handback';
5468: } else {
5469: if (!exists($readonly_files{$file_name})) {
5470: $readonly_files{$file_name} = 'locked';
5471: }
5472: }
5473: }
5474: }
5475: }
5476: }
5477: }
5478: return %readonly_files;
5479: }
5480: # ------------------------------------------------------------ Unmark as Read Only
5481:
5482: sub unmark_as_readonly {
5483: # unmarks $file_name (if $file_name is defined), or all files locked by $what
5484: # for portfolio submissions, $what contains [$symb,$crsid]
5485: my ($domain,$user,$what,$file_name,$group) = @_;
5486: $file_name = &declutter_portfile($file_name);
5487: my $symb_crs = $what;
5488: if (ref($what)) { $symb_crs=join('',@$what); }
5489: my %current_permissions = &dump('file_permissions',$domain,$user,$group);
5490: my ($tmp)=keys(%current_permissions);
5491: if ($tmp=~/^error:/) { undef(%current_permissions); }
5492: my @readonly_files = &get_marked_as_readonly($domain,$user,$what,$group);
5493: foreach my $file (@readonly_files) {
5494: my $clean_file = &declutter_portfile($file);
5495: if (defined($file_name) && ($file_name ne $clean_file)) { next; }
5496: my $current_locks = $current_permissions{$file};
5497: my @new_locks;
5498: my @del_keys;
5499: if (ref($current_locks) eq "ARRAY"){
5500: foreach my $locker (@{$current_locks}) {
5501: my $compare=$locker;
5502: if (ref($locker) eq 'ARRAY') {
5503: $compare=join('',@{$locker});
5504: if ($compare ne $symb_crs) {
5505: push(@new_locks, $locker);
5506: }
5507: }
5508: }
5509: if (scalar(@new_locks) > 0) {
5510: $current_permissions{$file} = \@new_locks;
5511: } else {
5512: push(@del_keys, $file);
5513: &del('file_permissions',\@del_keys, $domain, $user);
5514: delete($current_permissions{$file});
5515: }
5516: }
5517: }
5518: &put('file_permissions',\%current_permissions,$domain,$user);
5519: return;
5520: }
5521:
5522: # ------------------------------------------------------------ Directory lister
5523:
5524: sub dirlist {
5525: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
5526:
5527: $uri=~s/^\///;
5528: $uri=~s/\/$//;
5529: my ($udom, $uname);
5530: (undef,$udom,$uname)=split(/\//,$uri);
5531: if(defined($userdomain)) {
5532: $udom = $userdomain;
5533: }
5534: if(defined($username)) {
5535: $uname = $username;
5536: }
5537:
5538: my $dirRoot = $perlvar{'lonDocRoot'};
5539: if(defined($alternateDirectoryRoot)) {
5540: $dirRoot = $alternateDirectoryRoot;
5541: $dirRoot =~ s/\/$//;
5542: }
5543:
5544: if($udom) {
5545: if($uname) {
5546: my $listing = &reply('ls2:'.$dirRoot.'/'.$uri,
5547: &homeserver($uname,$udom));
5548: my @listing_results;
5549: if ($listing eq 'unknown_cmd') {
5550: $listing = &reply('ls:'.$dirRoot.'/'.$uri,
5551: &homeserver($uname,$udom));
5552: @listing_results = split(/:/,$listing);
5553: } else {
5554: @listing_results = map { &unescape($_); } split(/:/,$listing);
5555: }
5556: return @listing_results;
5557: } elsif(!defined($alternateDirectoryRoot)) {
5558: my %allusers;
5559: foreach my $tryserver (keys(%libserv)) {
5560: if($hostdom{$tryserver} eq $udom) {
5561: my $listing = &reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
5562: $udom, $tryserver);
5563: my @listing_results;
5564: if ($listing eq 'unknown_cmd') {
5565: $listing = &reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
5566: $udom, $tryserver);
5567: @listing_results = split(/:/,$listing);
5568: } else {
5569: @listing_results =
5570: map { &unescape($_); } split(/:/,$listing);
5571: }
5572: if ($listing_results[0] ne 'no_such_dir' &&
5573: $listing_results[0] ne 'empty' &&
5574: $listing_results[0] ne 'con_lost') {
5575: foreach my $line (@listing_results) {
5576: my ($entry) = split(/&/,$line,2);
5577: $allusers{$entry} = 1;
5578: }
5579: }
5580: }
5581: }
5582: my $alluserstr='';
5583: foreach my $user (sort(keys(%allusers))) {
5584: $alluserstr.=$user.'&user:';
5585: }
5586: $alluserstr=~s/:$//;
5587: return split(/:/,$alluserstr);
5588: } else {
5589: return ('missing user name');
5590: }
5591: } elsif(!defined($alternateDirectoryRoot)) {
5592: my $tryserver;
5593: my %alldom=();
5594: foreach $tryserver (keys(%libserv)) {
5595: $alldom{$hostdom{$tryserver}}=1;
5596: }
5597: my $alldomstr='';
5598: foreach my $domain (sort(keys(%alldom))) {
5599: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$domain.'/&domain:';
5600: }
5601: $alldomstr=~s/:$//;
5602: return split(/:/,$alldomstr);
5603: } else {
5604: return ('missing domain');
5605: }
5606: }
5607:
5608: # --------------------------------------------- GetFileTimestamp
5609: # This function utilizes dirlist and returns the date stamp for
5610: # when it was last modified. It will also return an error of -1
5611: # if an error occurs
5612:
5613: ##
5614: ## FIXME: This subroutine assumes its caller knows something about the
5615: ## directory structure of the home server for the student ($root).
5616: ## Not a good assumption to make. Since this is for looking up files
5617: ## in user directories, the full path should be constructed by lond, not
5618: ## whatever machine we request data from.
5619: ##
5620: sub GetFileTimestamp {
5621: my ($studentDomain,$studentName,$filename,$root)=@_;
5622: $studentDomain = &LONCAPA::clean_domain($studentDomain);
5623: $studentName = &LONCAPA::clean_username($studentName);
5624: my $subdir=$studentName.'__';
5625: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
5626: my $proname="$studentDomain/$subdir/$studentName";
5627: $proname .= '/'.$filename;
5628: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
5629: $studentName, $root);
5630: my @stats = split('&', $fileStat);
5631: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5632: # @stats contains first the filename, then the stat output
5633: return $stats[10]; # so this is 10 instead of 9.
5634: } else {
5635: return -1;
5636: }
5637: }
5638:
5639: sub stat_file {
5640: my ($uri) = @_;
5641: $uri = &clutter_with_no_wrapper($uri);
5642:
5643: my ($udom,$uname,$file,$dir);
5644: if ($uri =~ m-^/(uploaded|editupload)/-) {
5645: ($udom,$uname,$file) =
5646: ($uri =~ m-/(?:uploaded|editupload)/?($match_domain)/?($match_name)/?(.*)-);
5647: $file = 'userfiles/'.$file;
5648: $dir = &propath($udom,$uname);
5649: }
5650: if ($uri =~ m-^/res/-) {
5651: ($udom,$uname) =
5652: ($uri =~ m-/(?:res)/?($match_domain)/?($match_username)/-);
5653: $file = $uri;
5654: }
5655:
5656: if (!$udom || !$uname || !$file) {
5657: # unable to handle the uri
5658: return ();
5659: }
5660:
5661: my ($result) = &dirlist($file,$udom,$uname,$dir);
5662: my @stats = split('&', $result);
5663:
5664: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5665: shift(@stats); #filename is first
5666: return @stats;
5667: }
5668: return ();
5669: }
5670:
5671: # -------------------------------------------------------- Value of a Condition
5672:
5673: # gets the value of a specific preevaluated condition
5674: # stored in the string $env{user.state.<cid>}
5675: # or looks up a condition reference in the bighash and if if hasn't
5676: # already been evaluated recurses into docondval to get the value of
5677: # the condition, then memoizing it to
5678: # $env{user.state.<cid>.<condition>}
5679: sub directcondval {
5680: my $number=shift;
5681: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
5682: &Apache::lonuserstate::evalstate();
5683: }
5684: if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
5685: return $env{'user.state.'.$env{'request.course.id'}.".$number"};
5686: } elsif ($number =~ /^_/) {
5687: my $sub_condition;
5688: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5689: &GDBM_READER(),0640)) {
5690: $sub_condition=$bighash{'conditions'.$number};
5691: untie(%bighash);
5692: }
5693: my $value = &docondval($sub_condition);
5694: &appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
5695: return $value;
5696: }
5697: if ($env{'user.state.'.$env{'request.course.id'}}) {
5698: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
5699: } else {
5700: return 2;
5701: }
5702: }
5703:
5704: # get the collection of conditions for this resource
5705: sub condval {
5706: my $condidx=shift;
5707: my $allpathcond='';
5708: foreach my $cond (split(/\|/,$condidx)) {
5709: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
5710: $allpathcond.=
5711: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
5712: }
5713: }
5714: $allpathcond=~s/\|$//;
5715: return &docondval($allpathcond);
5716: }
5717:
5718: #evaluates an expression of conditions
5719: sub docondval {
5720: my ($allpathcond) = @_;
5721: my $result=0;
5722: if ($env{'request.course.id'}
5723: && defined($allpathcond)) {
5724: my $operand='|';
5725: my @stack;
5726: foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
5727: if ($chunk eq '(') {
5728: push @stack,($operand,$result);
5729: } elsif ($chunk eq ')') {
5730: my $before=pop @stack;
5731: if (pop @stack eq '&') {
5732: $result=$result>$before?$before:$result;
5733: } else {
5734: $result=$result>$before?$result:$before;
5735: }
5736: } elsif (($chunk eq '&') || ($chunk eq '|')) {
5737: $operand=$chunk;
5738: } else {
5739: my $new=directcondval($chunk);
5740: if ($operand eq '&') {
5741: $result=$result>$new?$new:$result;
5742: } else {
5743: $result=$result>$new?$result:$new;
5744: }
5745: }
5746: }
5747: }
5748: return $result;
5749: }
5750:
5751: # ---------------------------------------------------- Devalidate courseresdata
5752:
5753: sub devalidatecourseresdata {
5754: my ($coursenum,$coursedomain)=@_;
5755: my $hashid=$coursenum.':'.$coursedomain;
5756: &devalidate_cache_new('courseres',$hashid);
5757: }
5758:
5759:
5760: # --------------------------------------------------- Course Resourcedata Query
5761:
5762: sub get_courseresdata {
5763: my ($coursenum,$coursedomain)=@_;
5764: my $coursehom=&homeserver($coursenum,$coursedomain);
5765: my $hashid=$coursenum.':'.$coursedomain;
5766: my ($result,$cached)=&is_cached_new('courseres',$hashid);
5767: my %dumpreply;
5768: unless (defined($cached)) {
5769: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
5770: $result=\%dumpreply;
5771: my ($tmp) = keys(%dumpreply);
5772: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
5773: &do_cache_new('courseres',$hashid,$result,600);
5774: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
5775: return $tmp;
5776: } elsif ($tmp =~ /^(error)/) {
5777: $result=undef;
5778: &do_cache_new('courseres',$hashid,$result,600);
5779: }
5780: }
5781: return $result;
5782: }
5783:
5784: sub devalidateuserresdata {
5785: my ($uname,$udom)=@_;
5786: my $hashid="$udom:$uname";
5787: &devalidate_cache_new('userres',$hashid);
5788: }
5789:
5790: sub get_userresdata {
5791: my ($uname,$udom)=@_;
5792: #most student don\'t have any data set, check if there is some data
5793: if (&EXT_cache_status($udom,$uname)) { return undef; }
5794:
5795: my $hashid="$udom:$uname";
5796: my ($result,$cached)=&is_cached_new('userres',$hashid);
5797: if (!defined($cached)) {
5798: my %resourcedata=&dump('resourcedata',$udom,$uname);
5799: $result=\%resourcedata;
5800: &do_cache_new('userres',$hashid,$result,600);
5801: }
5802: my ($tmp)=keys(%$result);
5803: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
5804: return $result;
5805: }
5806: #error 2 occurs when the .db doesn't exist
5807: if ($tmp!~/error: 2 /) {
5808: &logthis("<font color=\"blue\">WARNING:".
5809: " Trying to get resource data for ".
5810: $uname." at ".$udom.": ".
5811: $tmp."</font>");
5812: } elsif ($tmp=~/error: 2 /) {
5813: #&EXT_cache_set($udom,$uname);
5814: &do_cache_new('userres',$hashid,undef,600);
5815: undef($tmp); # not really an error so don't send it back
5816: }
5817: return $tmp;
5818: }
5819:
5820: sub resdata {
5821: my ($name,$domain,$type,@which)=@_;
5822: my $result;
5823: if ($type eq 'course') {
5824: $result=&get_courseresdata($name,$domain);
5825: } elsif ($type eq 'user') {
5826: $result=&get_userresdata($name,$domain);
5827: }
5828: if (!ref($result)) { return $result; }
5829: foreach my $item (@which) {
5830: if (defined($result->{$item})) {
5831: return $result->{$item};
5832: }
5833: }
5834: return undef;
5835: }
5836:
5837: #
5838: # EXT resource caching routines
5839: #
5840:
5841: sub clear_EXT_cache_status {
5842: &delenv('cache.EXT.');
5843: }
5844:
5845: sub EXT_cache_status {
5846: my ($target_domain,$target_user) = @_;
5847: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5848: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
5849: # We know already the user has no data
5850: return 1;
5851: } else {
5852: return 0;
5853: }
5854: }
5855:
5856: sub EXT_cache_set {
5857: my ($target_domain,$target_user) = @_;
5858: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5859: #&appenv($cachename => time);
5860: }
5861:
5862: # --------------------------------------------------------- Value of a Variable
5863: sub EXT {
5864:
5865: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
5866: unless ($varname) { return ''; }
5867: #get real user name/domain, courseid and symb
5868: my $courseid;
5869: my $publicuser;
5870: if ($symbparm) {
5871: $symbparm=&get_symb_from_alias($symbparm);
5872: }
5873: if (!($uname && $udom)) {
5874: (my $cursymb,$courseid,$udom,$uname,$publicuser)= &whichuser($symbparm);
5875: if (!$symbparm) { $symbparm=$cursymb; }
5876: } else {
5877: $courseid=$env{'request.course.id'};
5878: }
5879: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
5880: my $rest;
5881: if (defined($therest[0])) {
5882: $rest=join('.',@therest);
5883: } else {
5884: $rest='';
5885: }
5886:
5887: my $qualifierrest=$qualifier;
5888: if ($rest) { $qualifierrest.='.'.$rest; }
5889: my $spacequalifierrest=$space;
5890: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
5891: if ($realm eq 'user') {
5892: # --------------------------------------------------------------- user.resource
5893: if ($space eq 'resource') {
5894: if ( (defined($Apache::lonhomework::parsing_a_problem)
5895: || defined($Apache::lonhomework::parsing_a_task))
5896: &&
5897: ($symbparm eq &symbread()) ) {
5898: # if we are in the middle of processing the resource the
5899: # get the value we are planning on committing
5900: if (defined($Apache::lonhomework::results{$qualifierrest})) {
5901: return $Apache::lonhomework::results{$qualifierrest};
5902: } else {
5903: return $Apache::lonhomework::history{$qualifierrest};
5904: }
5905: } else {
5906: my %restored;
5907: if ($publicuser || $env{'request.state'} eq 'construct') {
5908: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
5909: } else {
5910: %restored=&restore($symbparm,$courseid,$udom,$uname);
5911: }
5912: return $restored{$qualifierrest};
5913: }
5914: # ----------------------------------------------------------------- user.access
5915: } elsif ($space eq 'access') {
5916: # FIXME - not supporting calls for a specific user
5917: return &allowed($qualifier,$rest);
5918: # ------------------------------------------ user.preferences, user.environment
5919: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
5920: if (($uname eq $env{'user.name'}) &&
5921: ($udom eq $env{'user.domain'})) {
5922: return $env{join('.',('environment',$qualifierrest))};
5923: } else {
5924: my %returnhash;
5925: if (!$publicuser) {
5926: %returnhash=&userenvironment($udom,$uname,
5927: $qualifierrest);
5928: }
5929: return $returnhash{$qualifierrest};
5930: }
5931: # ----------------------------------------------------------------- user.course
5932: } elsif ($space eq 'course') {
5933: # FIXME - not supporting calls for a specific user
5934: return $env{join('.',('request.course',$qualifier))};
5935: # ------------------------------------------------------------------- user.role
5936: } elsif ($space eq 'role') {
5937: # FIXME - not supporting calls for a specific user
5938: my ($role,$where)=split(/\./,$env{'request.role'});
5939: if ($qualifier eq 'value') {
5940: return $role;
5941: } elsif ($qualifier eq 'extent') {
5942: return $where;
5943: }
5944: # ----------------------------------------------------------------- user.domain
5945: } elsif ($space eq 'domain') {
5946: return $udom;
5947: # ------------------------------------------------------------------- user.name
5948: } elsif ($space eq 'name') {
5949: return $uname;
5950: # ---------------------------------------------------- Any other user namespace
5951: } else {
5952: my %reply;
5953: if (!$publicuser) {
5954: %reply=&get($space,[$qualifierrest],$udom,$uname);
5955: }
5956: return $reply{$qualifierrest};
5957: }
5958: } elsif ($realm eq 'query') {
5959: # ---------------------------------------------- pull stuff out of query string
5960: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
5961: [$spacequalifierrest]);
5962: return $env{'form.'.$spacequalifierrest};
5963: } elsif ($realm eq 'request') {
5964: # ------------------------------------------------------------- request.browser
5965: if ($space eq 'browser') {
5966: if ($qualifier eq 'textremote') {
5967: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
5968: return 1;
5969: } else {
5970: return 0;
5971: }
5972: } else {
5973: return $env{'browser.'.$qualifier};
5974: }
5975: # ------------------------------------------------------------ request.filename
5976: } else {
5977: return $env{'request.'.$spacequalifierrest};
5978: }
5979: } elsif ($realm eq 'course') {
5980: # ---------------------------------------------------------- course.description
5981: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
5982: } elsif ($realm eq 'resource') {
5983:
5984: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
5985: if (!$symbparm) { $symbparm=&symbread(); }
5986: }
5987:
5988: if ($space eq 'title') {
5989: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
5990: return &gettitle($symbparm);
5991: }
5992:
5993: if ($space eq 'map') {
5994: my ($map) = &decode_symb($symbparm);
5995: return &symbread($map);
5996: }
5997:
5998: my ($section, $group, @groups);
5999: my ($courselevelm,$courselevel);
6000: if ($symbparm && defined($courseid) &&
6001: $courseid eq $env{'request.course.id'}) {
6002:
6003: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
6004:
6005: # ----------------------------------------------------- Cascading lookup scheme
6006: my $symbp=$symbparm;
6007: my $mapp=&deversion((&decode_symb($symbp))[0]);
6008:
6009: my $symbparm=$symbp.'.'.$spacequalifierrest;
6010: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
6011:
6012: if (($env{'user.name'} eq $uname) &&
6013: ($env{'user.domain'} eq $udom)) {
6014: $section=$env{'request.course.sec'};
6015: @groups = split(/:/,$env{'request.course.groups'});
6016: @groups=&sort_course_groups($courseid,@groups);
6017: } else {
6018: if (! defined($usection)) {
6019: $section=&getsection($udom,$uname,$courseid);
6020: } else {
6021: $section = $usection;
6022: }
6023: @groups = &get_users_groups($udom,$uname,$courseid);
6024: }
6025:
6026: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
6027: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
6028: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
6029:
6030: $courselevel=$courseid.'.'.$spacequalifierrest;
6031: my $courselevelr=$courseid.'.'.$symbparm;
6032: $courselevelm=$courseid.'.'.$mapparm;
6033:
6034: # ----------------------------------------------------------- first, check user
6035:
6036: my $userreply=&resdata($uname,$udom,'user',
6037: ($courselevelr,$courselevelm,
6038: $courselevel));
6039: if (defined($userreply)) { return $userreply; }
6040:
6041: # ------------------------------------------------ second, check some of course
6042: my $coursereply;
6043: if (@groups > 0) {
6044: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
6045: $mapparm,$spacequalifierrest);
6046: if (defined($coursereply)) { return $coursereply; }
6047: }
6048:
6049: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
6050: $env{'course.'.$courseid.'.domain'},
6051: 'course',
6052: ($seclevelr,$seclevelm,$seclevel,
6053: $courselevelr));
6054: if (defined($coursereply)) { return $coursereply; }
6055:
6056: # ------------------------------------------------------ third, check map parms
6057: my %parmhash=();
6058: my $thisparm='';
6059: if (tie(%parmhash,'GDBM_File',
6060: $env{'request.course.fn'}.'_parms.db',
6061: &GDBM_READER(),0640)) {
6062: $thisparm=$parmhash{$symbparm};
6063: untie(%parmhash);
6064: }
6065: if ($thisparm) { return $thisparm; }
6066: }
6067: # ------------------------------------------ fourth, look in resource metadata
6068:
6069: $spacequalifierrest=~s/\./\_/;
6070: my $filename;
6071: if (!$symbparm) { $symbparm=&symbread(); }
6072: if ($symbparm) {
6073: $filename=(&decode_symb($symbparm))[2];
6074: } else {
6075: $filename=$env{'request.filename'};
6076: }
6077: my $metadata=&metadata($filename,$spacequalifierrest);
6078: if (defined($metadata)) { return $metadata; }
6079: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
6080: if (defined($metadata)) { return $metadata; }
6081:
6082: # ---------------------------------------------- fourth, look in rest pf course
6083: if ($symbparm && defined($courseid) &&
6084: $courseid eq $env{'request.course.id'}) {
6085: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
6086: $env{'course.'.$courseid.'.domain'},
6087: 'course',
6088: ($courselevelm,$courselevel));
6089: if (defined($coursereply)) { return $coursereply; }
6090: }
6091: # ------------------------------------------------------------------ Cascade up
6092: unless ($space eq '0') {
6093: my @parts=split(/_/,$space);
6094: my $id=pop(@parts);
6095: my $part=join('_',@parts);
6096: if ($part eq '') { $part='0'; }
6097: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
6098: $symbparm,$udom,$uname,$section,1);
6099: if (defined($partgeneral)) { return $partgeneral; }
6100: }
6101: if ($recurse) { return undef; }
6102: my $pack_def=&packages_tab_default($filename,$varname);
6103: if (defined($pack_def)) { return $pack_def; }
6104:
6105: # ---------------------------------------------------- Any other user namespace
6106: } elsif ($realm eq 'environment') {
6107: # ----------------------------------------------------------------- environment
6108: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
6109: return $env{'environment.'.$spacequalifierrest};
6110: } else {
6111: if ($uname eq 'anonymous' && $udom eq '') {
6112: return '';
6113: }
6114: my %returnhash=&userenvironment($udom,$uname,
6115: $spacequalifierrest);
6116: return $returnhash{$spacequalifierrest};
6117: }
6118: } elsif ($realm eq 'system') {
6119: # ----------------------------------------------------------------- system.time
6120: if ($space eq 'time') {
6121: return time;
6122: }
6123: } elsif ($realm eq 'server') {
6124: # ----------------------------------------------------------------- system.time
6125: if ($space eq 'name') {
6126: return $ENV{'SERVER_NAME'};
6127: }
6128: }
6129: return '';
6130: }
6131:
6132: sub check_group_parms {
6133: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
6134: my @groupitems = ();
6135: my $resultitem;
6136: my @levels = ($symbparm,$mapparm,$what);
6137: foreach my $group (@{$groups}) {
6138: foreach my $level (@levels) {
6139: my $item = $courseid.'.['.$group.'].'.$level;
6140: push(@groupitems,$item);
6141: }
6142: }
6143: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
6144: $env{'course.'.$courseid.'.domain'},
6145: 'course',@groupitems);
6146: return $coursereply;
6147: }
6148:
6149: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
6150: my ($courseid,@groups) = @_;
6151: @groups = sort(@groups);
6152: return @groups;
6153: }
6154:
6155: sub packages_tab_default {
6156: my ($uri,$varname)=@_;
6157: my (undef,$part,$name)=split(/\./,$varname);
6158:
6159: my (@extension,@specifics,$do_default);
6160: foreach my $package (split(/,/,&metadata($uri,'packages'))) {
6161: my ($pack_type,$pack_part)=split(/_/,$package,2);
6162: if ($pack_type eq 'default') {
6163: $do_default=1;
6164: } elsif ($pack_type eq 'extension') {
6165: push(@extension,[$package,$pack_type,$pack_part]);
6166: } else {
6167: push(@specifics,[$package,$pack_type,$pack_part]);
6168: }
6169: }
6170: # first look for a package that matches the requested part id
6171: foreach my $package (@specifics) {
6172: my (undef,$pack_type,$pack_part)=@{$package};
6173: next if ($pack_part ne $part);
6174: if (defined($packagetab{"$pack_type&$name&default"})) {
6175: return $packagetab{"$pack_type&$name&default"};
6176: }
6177: }
6178: # look for any possible matching non extension_ package
6179: foreach my $package (@specifics) {
6180: my (undef,$pack_type,$pack_part)=@{$package};
6181: if (defined($packagetab{"$pack_type&$name&default"})) {
6182: return $packagetab{"$pack_type&$name&default"};
6183: }
6184: if ($pack_type eq 'part') { $pack_part='0'; }
6185: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
6186: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
6187: }
6188: }
6189: # look for any posible extension_ match
6190: foreach my $package (@extension) {
6191: my ($package,$pack_type)=@{$package};
6192: if (defined($packagetab{"$pack_type&$name&default"})) {
6193: return $packagetab{"$pack_type&$name&default"};
6194: }
6195: if (defined($packagetab{$package."&$name&default"})) {
6196: return $packagetab{$package."&$name&default"};
6197: }
6198: }
6199: # look for a global default setting
6200: if ($do_default && defined($packagetab{"default&$name&default"})) {
6201: return $packagetab{"default&$name&default"};
6202: }
6203: return undef;
6204: }
6205:
6206: sub add_prefix_and_part {
6207: my ($prefix,$part)=@_;
6208: my $keyroot;
6209: if (defined($prefix) && $prefix !~ /^__/) {
6210: # prefix that has a part already
6211: $keyroot=$prefix;
6212: } elsif (defined($prefix)) {
6213: # prefix that is missing a part
6214: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
6215: } else {
6216: # no prefix at all
6217: if (defined($part)) { $keyroot='_'.$part; }
6218: }
6219: return $keyroot;
6220: }
6221:
6222: # ---------------------------------------------------------------- Get metadata
6223:
6224: my %metaentry;
6225: sub metadata {
6226: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
6227: $uri=&declutter($uri);
6228: # if it is a non metadata possible uri return quickly
6229: if (($uri eq '') ||
6230: (($uri =~ m|^/*adm/|) &&
6231: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
6232: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
6233: ($uri =~ m|home/$match_username/public_html/|)) {
6234: return undef;
6235: }
6236: my $filename=$uri;
6237: $uri=~s/\.meta$//;
6238: #
6239: # Is the metadata already cached?
6240: # Look at timestamp of caching
6241: # Everything is cached by the main uri, libraries are never directly cached
6242: #
6243: if (!defined($liburi)) {
6244: my ($result,$cached)=&is_cached_new('meta',$uri);
6245: if (defined($cached)) { return $result->{':'.$what}; }
6246: }
6247: {
6248: #
6249: # Is this a recursive call for a library?
6250: #
6251: # if (! exists($metacache{$uri})) {
6252: # $metacache{$uri}={};
6253: # }
6254: if ($liburi) {
6255: $liburi=&declutter($liburi);
6256: $filename=$liburi;
6257: } else {
6258: &devalidate_cache_new('meta',$uri);
6259: undef(%metaentry);
6260: }
6261: my %metathesekeys=();
6262: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
6263: my $metastring;
6264: if ($uri !~ m -^(editupload)/-) {
6265: my $file=&filelocation('',&clutter($filename));
6266: #push(@{$metaentry{$uri.'.file'}},$file);
6267: $metastring=&getfile($file);
6268: }
6269: my $parser=HTML::LCParser->new(\$metastring);
6270: my $token;
6271: undef %metathesekeys;
6272: while ($token=$parser->get_token) {
6273: if ($token->[0] eq 'S') {
6274: if (defined($token->[2]->{'package'})) {
6275: #
6276: # This is a package - get package info
6277: #
6278: my $package=$token->[2]->{'package'};
6279: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6280: if (defined($token->[2]->{'id'})) {
6281: $keyroot.='_'.$token->[2]->{'id'};
6282: }
6283: if ($metaentry{':packages'}) {
6284: $metaentry{':packages'}.=','.$package.$keyroot;
6285: } else {
6286: $metaentry{':packages'}=$package.$keyroot;
6287: }
6288: foreach my $pack_entry (keys(%packagetab)) {
6289: my $part=$keyroot;
6290: $part=~s/^\_//;
6291: if ($pack_entry=~/^\Q$package\E\&/ ||
6292: $pack_entry=~/^\Q$package\E_0\&/) {
6293: my ($pack,$name,$subp)=split(/\&/,$pack_entry);
6294: # ignore package.tab specified default values
6295: # here &package_tab_default() will fetch those
6296: if ($subp eq 'default') { next; }
6297: my $value=$packagetab{$pack_entry};
6298: my $unikey;
6299: if ($pack =~ /_0$/) {
6300: $unikey='parameter_0_'.$name;
6301: $part=0;
6302: } else {
6303: $unikey='parameter'.$keyroot.'_'.$name;
6304: }
6305: if ($subp eq 'display') {
6306: $value.=' [Part: '.$part.']';
6307: }
6308: $metaentry{':'.$unikey.'.part'}=$part;
6309: $metathesekeys{$unikey}=1;
6310: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6311: $metaentry{':'.$unikey.'.'.$subp}=$value;
6312: }
6313: if (defined($metaentry{':'.$unikey.'.default'})) {
6314: $metaentry{':'.$unikey}=
6315: $metaentry{':'.$unikey.'.default'};
6316: }
6317: }
6318: }
6319: } else {
6320: #
6321: # This is not a package - some other kind of start tag
6322: #
6323: my $entry=$token->[1];
6324: my $unikey;
6325: if ($entry eq 'import') {
6326: $unikey='';
6327: } else {
6328: $unikey=$entry;
6329: }
6330: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6331:
6332: if (defined($token->[2]->{'id'})) {
6333: $unikey.='_'.$token->[2]->{'id'};
6334: }
6335:
6336: if ($entry eq 'import') {
6337: #
6338: # Importing a library here
6339: #
6340: if ($depthcount<20) {
6341: my $location=$parser->get_text('/import');
6342: my $dir=$filename;
6343: $dir=~s|[^/]*$||;
6344: $location=&filelocation($dir,$location);
6345: my $metadata =
6346: &metadata($uri,'keys', $location,$unikey,
6347: $depthcount+1);
6348: foreach my $meta (split(',',$metadata)) {
6349: $metaentry{':'.$meta}=$metaentry{':'.$meta};
6350: $metathesekeys{$meta}=1;
6351: }
6352: }
6353: } else {
6354:
6355: if (defined($token->[2]->{'name'})) {
6356: $unikey.='_'.$token->[2]->{'name'};
6357: }
6358: $metathesekeys{$unikey}=1;
6359: foreach my $param (@{$token->[3]}) {
6360: $metaentry{':'.$unikey.'.'.$param} =
6361: $token->[2]->{$param};
6362: }
6363: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
6364: my $default=$metaentry{':'.$unikey.'.default'};
6365: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
6366: # only ws inside the tag, and not in default, so use default
6367: # as value
6368: $metaentry{':'.$unikey}=$default;
6369: } else {
6370: # either something interesting inside the tag or default
6371: # uninteresting
6372: $metaentry{':'.$unikey}=$internaltext;
6373: }
6374: # end of not-a-package not-a-library import
6375: }
6376: # end of not-a-package start tag
6377: }
6378: # the next is the end of "start tag"
6379: }
6380: }
6381: my ($extension) = ($uri =~ /\.(\w+)$/);
6382: foreach my $key (keys(%packagetab)) {
6383: #no specific packages #how's our extension
6384: if ($key!~/^extension_\Q$extension\E&/) { next; }
6385: &metadata_create_package_def($uri,$key,'extension_'.$extension,
6386: \%metathesekeys);
6387: }
6388: if (!exists($metaentry{':packages'})) {
6389: foreach my $key (keys(%packagetab)) {
6390: #no specific packages well let's get default then
6391: if ($key!~/^default&/) { next; }
6392: &metadata_create_package_def($uri,$key,'default',
6393: \%metathesekeys);
6394: }
6395: }
6396: # are there custom rights to evaluate
6397: if ($metaentry{':copyright'} eq 'custom') {
6398:
6399: #
6400: # Importing a rights file here
6401: #
6402: unless ($depthcount) {
6403: my $location=$metaentry{':customdistributionfile'};
6404: my $dir=$filename;
6405: $dir=~s|[^/]*$||;
6406: $location=&filelocation($dir,$location);
6407: my $rights_metadata =
6408: &metadata($uri,'keys',$location,'_rights',
6409: $depthcount+1);
6410: foreach my $rights (split(',',$rights_metadata)) {
6411: #$metaentry{':'.$rights}=$metacache{$uri}->{':'.$rights};
6412: $metathesekeys{$rights}=1;
6413: }
6414: }
6415: }
6416: # uniqifiy package listing
6417: my %seen;
6418: my @uniq_packages =
6419: grep { ! $seen{$_} ++ } (split(',',$metaentry{':packages'}));
6420: $metaentry{':packages'} = join(',',@uniq_packages);
6421:
6422: $metaentry{':keys'} = join(',',keys(%metathesekeys));
6423: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
6424: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
6425: &do_cache_new('meta',$uri,\%metaentry,60*60);
6426: # this is the end of "was not already recently cached
6427: }
6428: return $metaentry{':'.$what};
6429: }
6430:
6431: sub metadata_create_package_def {
6432: my ($uri,$key,$package,$metathesekeys)=@_;
6433: my ($pack,$name,$subp)=split(/\&/,$key);
6434: if ($subp eq 'default') { next; }
6435:
6436: if (defined($metaentry{':packages'})) {
6437: $metaentry{':packages'}.=','.$package;
6438: } else {
6439: $metaentry{':packages'}=$package;
6440: }
6441: my $value=$packagetab{$key};
6442: my $unikey;
6443: $unikey='parameter_0_'.$name;
6444: $metaentry{':'.$unikey.'.part'}=0;
6445: $$metathesekeys{$unikey}=1;
6446: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6447: $metaentry{':'.$unikey.'.'.$subp}=$value;
6448: }
6449: if (defined($metaentry{':'.$unikey.'.default'})) {
6450: $metaentry{':'.$unikey}=
6451: $metaentry{':'.$unikey.'.default'};
6452: }
6453: }
6454:
6455: sub metadata_generate_part0 {
6456: my ($metadata,$metacache,$uri) = @_;
6457: my %allnames;
6458: foreach my $metakey (keys(%$metadata)) {
6459: if ($metakey=~/^parameter\_(.*)/) {
6460: my $part=$$metacache{':'.$metakey.'.part'};
6461: my $name=$$metacache{':'.$metakey.'.name'};
6462: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
6463: $allnames{$name}=$part;
6464: }
6465: }
6466: }
6467: foreach my $name (keys(%allnames)) {
6468: $$metadata{"parameter_0_$name"}=1;
6469: my $key=":parameter_0_$name";
6470: $$metacache{"$key.part"}='0';
6471: $$metacache{"$key.name"}=$name;
6472: $$metacache{"$key.type"}=$$metacache{':parameter_'.
6473: $allnames{$name}.'_'.$name.
6474: '.type'};
6475: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
6476: '.display'};
6477: my $expr='[Part: '.$allnames{$name}.']';
6478: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
6479: $$metacache{"$key.display"}=$olddis;
6480: }
6481: }
6482:
6483: # ------------------------------------------------------ Devalidate title cache
6484:
6485: sub devalidate_title_cache {
6486: my ($url)=@_;
6487: if (!$env{'request.course.id'}) { return; }
6488: my $symb=&symbread($url);
6489: if (!$symb) { return; }
6490: my $key=$env{'request.course.id'}."\0".$symb;
6491: &devalidate_cache_new('title',$key);
6492: }
6493:
6494: # ------------------------------------------------- Get the title of a resource
6495:
6496: sub gettitle {
6497: my $urlsymb=shift;
6498: my $symb=&symbread($urlsymb);
6499: if ($symb) {
6500: my $key=$env{'request.course.id'}."\0".$symb;
6501: my ($result,$cached)=&is_cached_new('title',$key);
6502: if (defined($cached)) {
6503: return $result;
6504: }
6505: my ($map,$resid,$url)=&decode_symb($symb);
6506: my $title='';
6507: my %bighash;
6508: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6509: &GDBM_READER(),0640)) {
6510: my $mapid=$bighash{'map_pc_'.&clutter($map)};
6511: $title=$bighash{'title_'.$mapid.'.'.$resid};
6512: untie %bighash;
6513: }
6514: $title=~s/\&colon\;/\:/gs;
6515: if ($title) {
6516: return &do_cache_new('title',$key,$title,600);
6517: }
6518: $urlsymb=$url;
6519: }
6520: my $title=&metadata($urlsymb,'title');
6521: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
6522: return $title;
6523: }
6524:
6525: sub get_slot {
6526: my ($which,$cnum,$cdom)=@_;
6527: if (!$cnum || !$cdom) {
6528: (undef,my $courseid)=&whichuser();
6529: $cdom=$env{'course.'.$courseid.'.domain'};
6530: $cnum=$env{'course.'.$courseid.'.num'};
6531: }
6532: my $key=join("\0",'slots',$cdom,$cnum,$which);
6533: my %slotinfo;
6534: if (exists($remembered{$key})) {
6535: $slotinfo{$which} = $remembered{$key};
6536: } else {
6537: %slotinfo=&get('slots',[$which],$cdom,$cnum);
6538: &Apache::lonhomework::showhash(%slotinfo);
6539: my ($tmp)=keys(%slotinfo);
6540: if ($tmp=~/^error:/) { return (); }
6541: $remembered{$key} = $slotinfo{$which};
6542: }
6543: if (ref($slotinfo{$which}) eq 'HASH') {
6544: return %{$slotinfo{$which}};
6545: }
6546: return $slotinfo{$which};
6547: }
6548: # ------------------------------------------------- Update symbolic store links
6549:
6550: sub symblist {
6551: my ($mapname,%newhash)=@_;
6552: $mapname=&deversion(&declutter($mapname));
6553: my %hash;
6554: if (($env{'request.course.fn'}) && (%newhash)) {
6555: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6556: &GDBM_WRCREAT(),0640)) {
6557: foreach my $url (keys %newhash) {
6558: next if ($url eq 'last_known'
6559: && $env{'form.no_update_last_known'});
6560: $hash{declutter($url)}=&encode_symb($mapname,
6561: $newhash{$url}->[1],
6562: $newhash{$url}->[0]);
6563: }
6564: if (untie(%hash)) {
6565: return 'ok';
6566: }
6567: }
6568: }
6569: return 'error';
6570: }
6571:
6572: # --------------------------------------------------------------- Verify a symb
6573:
6574: sub symbverify {
6575: my ($symb,$thisurl)=@_;
6576: my $thisfn=$thisurl;
6577: $thisfn=&declutter($thisfn);
6578: # direct jump to resource in page or to a sequence - will construct own symbs
6579: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
6580: # check URL part
6581: my ($map,$resid,$url)=&decode_symb($symb);
6582:
6583: unless ($url eq $thisfn) { return 0; }
6584:
6585: $symb=&symbclean($symb);
6586: $thisurl=&deversion($thisurl);
6587: $thisfn=&deversion($thisfn);
6588:
6589: my %bighash;
6590: my $okay=0;
6591:
6592: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6593: &GDBM_READER(),0640)) {
6594: my $ids=$bighash{'ids_'.&clutter($thisurl)};
6595: unless ($ids) {
6596: $ids=$bighash{'ids_/'.$thisurl};
6597: }
6598: if ($ids) {
6599: # ------------------------------------------------------------------- Has ID(s)
6600: foreach my $id (split(/\,/,$ids)) {
6601: my ($mapid,$resid)=split(/\./,$id);
6602: if (
6603: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
6604: eq $symb) {
6605: if (($env{'request.role.adv'}) ||
6606: $bighash{'encrypted_'.$id} eq $env{'request.enc'}) {
6607: $okay=1;
6608: }
6609: }
6610: }
6611: }
6612: untie(%bighash);
6613: }
6614: return $okay;
6615: }
6616:
6617: # --------------------------------------------------------------- Clean-up symb
6618:
6619: sub symbclean {
6620: my $symb=shift;
6621: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6622: # remove version from map
6623: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
6624:
6625: # remove version from URL
6626: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
6627:
6628: # remove wrapper
6629:
6630: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
6631: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
6632: return $symb;
6633: }
6634:
6635: # ---------------------------------------------- Split symb to find map and url
6636:
6637: sub encode_symb {
6638: my ($map,$resid,$url)=@_;
6639: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
6640: }
6641:
6642: sub decode_symb {
6643: my $symb=shift;
6644: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6645: my ($map,$resid,$url)=split(/___/,$symb);
6646: return (&fixversion($map),$resid,&fixversion($url));
6647: }
6648:
6649: sub fixversion {
6650: my $fn=shift;
6651: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
6652: my %bighash;
6653: my $uri=&clutter($fn);
6654: my $key=$env{'request.course.id'}.'_'.$uri;
6655: # is this cached?
6656: my ($result,$cached)=&is_cached_new('courseresversion',$key);
6657: if (defined($cached)) { return $result; }
6658: # unfortunately not cached, or expired
6659: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6660: &GDBM_READER(),0640)) {
6661: if ($bighash{'version_'.$uri}) {
6662: my $version=$bighash{'version_'.$uri};
6663: unless (($version eq 'mostrecent') ||
6664: ($version==&getversion($uri))) {
6665: $uri=~s/\.(\w+)$/\.$version\.$1/;
6666: }
6667: }
6668: untie %bighash;
6669: }
6670: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
6671: }
6672:
6673: sub deversion {
6674: my $url=shift;
6675: $url=~s/\.\d+\.(\w+)$/\.$1/;
6676: return $url;
6677: }
6678:
6679: # ------------------------------------------------------ Return symb list entry
6680:
6681: sub symbread {
6682: my ($thisfn,$donotrecurse)=@_;
6683: my $cache_str='request.symbread.cached.'.$thisfn;
6684: if (defined($env{$cache_str})) { return $env{$cache_str}; }
6685: # no filename provided? try from environment
6686: unless ($thisfn) {
6687: if ($env{'request.symb'}) {
6688: return $env{$cache_str}=&symbclean($env{'request.symb'});
6689: }
6690: $thisfn=$env{'request.filename'};
6691: }
6692: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
6693: # is that filename actually a symb? Verify, clean, and return
6694: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
6695: if (&symbverify($thisfn,$1)) {
6696: return $env{$cache_str}=&symbclean($thisfn);
6697: }
6698: }
6699: $thisfn=declutter($thisfn);
6700: my %hash;
6701: my %bighash;
6702: my $syval='';
6703: if (($env{'request.course.fn'}) && ($thisfn)) {
6704: my $targetfn = $thisfn;
6705: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
6706: $targetfn = 'adm/wrapper/'.$thisfn;
6707: }
6708: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
6709: $targetfn=$1;
6710: }
6711: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6712: &GDBM_READER(),0640)) {
6713: $syval=$hash{$targetfn};
6714: untie(%hash);
6715: }
6716: # ---------------------------------------------------------- There was an entry
6717: if ($syval) {
6718: #unless ($syval=~/\_\d+$/) {
6719: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
6720: #&appenv('request.ambiguous' => $thisfn);
6721: #return $env{$cache_str}='';
6722: #}
6723: #$syval.=$1;
6724: #}
6725: } else {
6726: # ------------------------------------------------------- Was not in symb table
6727: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6728: &GDBM_READER(),0640)) {
6729: # ---------------------------------------------- Get ID(s) for current resource
6730: my $ids=$bighash{'ids_'.&clutter($thisfn)};
6731: unless ($ids) {
6732: $ids=$bighash{'ids_/'.$thisfn};
6733: }
6734: unless ($ids) {
6735: # alias?
6736: $ids=$bighash{'mapalias_'.$thisfn};
6737: }
6738: if ($ids) {
6739: # ------------------------------------------------------------------- Has ID(s)
6740: my @possibilities=split(/\,/,$ids);
6741: if ($#possibilities==0) {
6742: # ----------------------------------------------- There is only one possibility
6743: my ($mapid,$resid)=split(/\./,$ids);
6744: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6745: $resid,$thisfn);
6746: } elsif (!$donotrecurse) {
6747: # ------------------------------------------ There is more than one possibility
6748: my $realpossible=0;
6749: foreach my $id (@possibilities) {
6750: my $file=$bighash{'src_'.$id};
6751: if (&allowed('bre',$file)) {
6752: my ($mapid,$resid)=split(/\./,$id);
6753: if ($bighash{'map_type_'.$mapid} ne 'page') {
6754: $realpossible++;
6755: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6756: $resid,$thisfn);
6757: }
6758: }
6759: }
6760: if ($realpossible!=1) { $syval=''; }
6761: } else {
6762: $syval='';
6763: }
6764: }
6765: untie(%bighash)
6766: }
6767: }
6768: if ($syval) {
6769: return $env{$cache_str}=$syval;
6770: }
6771: }
6772: &appenv('request.ambiguous' => $thisfn);
6773: return $env{$cache_str}='';
6774: }
6775:
6776: # ---------------------------------------------------------- Return random seed
6777:
6778: sub numval {
6779: my $txt=shift;
6780: $txt=~tr/A-J/0-9/;
6781: $txt=~tr/a-j/0-9/;
6782: $txt=~tr/K-T/0-9/;
6783: $txt=~tr/k-t/0-9/;
6784: $txt=~tr/U-Z/0-5/;
6785: $txt=~tr/u-z/0-5/;
6786: $txt=~s/\D//g;
6787: if ($_64bit) { if ($txt > 2**32) { return -1; } }
6788: return int($txt);
6789: }
6790:
6791: sub numval2 {
6792: my $txt=shift;
6793: $txt=~tr/A-J/0-9/;
6794: $txt=~tr/a-j/0-9/;
6795: $txt=~tr/K-T/0-9/;
6796: $txt=~tr/k-t/0-9/;
6797: $txt=~tr/U-Z/0-5/;
6798: $txt=~tr/u-z/0-5/;
6799: $txt=~s/\D//g;
6800: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6801: my $total;
6802: foreach my $val (@txts) { $total+=$val; }
6803: if ($_64bit) { if ($total > 2**32) { return -1; } }
6804: return int($total);
6805: }
6806:
6807: sub numval3 {
6808: use integer;
6809: my $txt=shift;
6810: $txt=~tr/A-J/0-9/;
6811: $txt=~tr/a-j/0-9/;
6812: $txt=~tr/K-T/0-9/;
6813: $txt=~tr/k-t/0-9/;
6814: $txt=~tr/U-Z/0-5/;
6815: $txt=~tr/u-z/0-5/;
6816: $txt=~s/\D//g;
6817: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6818: my $total;
6819: foreach my $val (@txts) { $total+=$val; }
6820: if ($_64bit) { $total=(($total<<32)>>32); }
6821: return $total;
6822: }
6823:
6824: sub digest {
6825: my ($data)=@_;
6826: my $digest=&Digest::MD5::md5($data);
6827: my ($a,$b,$c,$d)=unpack("iiii",$digest);
6828: my ($e,$f);
6829: {
6830: use integer;
6831: $e=($a+$b);
6832: $f=($c+$d);
6833: if ($_64bit) {
6834: $e=(($e<<32)>>32);
6835: $f=(($f<<32)>>32);
6836: }
6837: }
6838: if (wantarray) {
6839: return ($e,$f);
6840: } else {
6841: my $g;
6842: {
6843: use integer;
6844: $g=($e+$f);
6845: if ($_64bit) {
6846: $g=(($g<<32)>>32);
6847: }
6848: }
6849: return $g;
6850: }
6851: }
6852:
6853: sub latest_rnd_algorithm_id {
6854: return '64bit5';
6855: }
6856:
6857: sub get_rand_alg {
6858: my ($courseid)=@_;
6859: if (!$courseid) { $courseid=(&whichuser())[1]; }
6860: if ($courseid) {
6861: return $env{"course.$courseid.rndseed"};
6862: }
6863: return &latest_rnd_algorithm_id();
6864: }
6865:
6866: sub validCODE {
6867: my ($CODE)=@_;
6868: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
6869: return 0;
6870: }
6871:
6872: sub getCODE {
6873: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
6874: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
6875: defined($Apache::lonhomework::parsing_a_task) ) &&
6876: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
6877: return $Apache::lonhomework::history{'resource.CODE'};
6878: }
6879: return undef;
6880: }
6881:
6882: sub rndseed {
6883: my ($symb,$courseid,$domain,$username)=@_;
6884:
6885: my ($wsymb,$wcourseid,$wdomain,$wusername)=&whichuser();
6886: if (!$symb) {
6887: unless ($symb=$wsymb) { return time; }
6888: }
6889: if (!$courseid) { $courseid=$wcourseid; }
6890: if (!$domain) { $domain=$wdomain; }
6891: if (!$username) { $username=$wusername }
6892: my $which=&get_rand_alg();
6893:
6894: if (defined(&getCODE())) {
6895: if ($which eq '64bit5') {
6896: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
6897: } elsif ($which eq '64bit4') {
6898: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
6899: } else {
6900: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
6901: }
6902: } elsif ($which eq '64bit5') {
6903: return &rndseed_64bit5($symb,$courseid,$domain,$username);
6904: } elsif ($which eq '64bit4') {
6905: return &rndseed_64bit4($symb,$courseid,$domain,$username);
6906: } elsif ($which eq '64bit3') {
6907: return &rndseed_64bit3($symb,$courseid,$domain,$username);
6908: } elsif ($which eq '64bit2') {
6909: return &rndseed_64bit2($symb,$courseid,$domain,$username);
6910: } elsif ($which eq '64bit') {
6911: return &rndseed_64bit($symb,$courseid,$domain,$username);
6912: }
6913: return &rndseed_32bit($symb,$courseid,$domain,$username);
6914: }
6915:
6916: sub rndseed_32bit {
6917: my ($symb,$courseid,$domain,$username)=@_;
6918: {
6919: use integer;
6920: my $symbchck=unpack("%32C*",$symb) << 27;
6921: my $symbseed=numval($symb) << 22;
6922: my $namechck=unpack("%32C*",$username) << 17;
6923: my $nameseed=numval($username) << 12;
6924: my $domainseed=unpack("%32C*",$domain) << 7;
6925: my $courseseed=unpack("%32C*",$courseid);
6926: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
6927: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6928: #&logthis("rndseed :$num:$symb");
6929: if ($_64bit) { $num=(($num<<32)>>32); }
6930: return $num;
6931: }
6932: }
6933:
6934: sub rndseed_64bit {
6935: my ($symb,$courseid,$domain,$username)=@_;
6936: {
6937: use integer;
6938: my $symbchck=unpack("%32S*",$symb) << 21;
6939: my $symbseed=numval($symb) << 10;
6940: my $namechck=unpack("%32S*",$username);
6941:
6942: my $nameseed=numval($username) << 21;
6943: my $domainseed=unpack("%32S*",$domain) << 10;
6944: my $courseseed=unpack("%32S*",$courseid);
6945:
6946: my $num1=$symbchck+$symbseed+$namechck;
6947: my $num2=$nameseed+$domainseed+$courseseed;
6948: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6949: #&logthis("rndseed :$num:$symb");
6950: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6951: return "$num1,$num2";
6952: }
6953: }
6954:
6955: sub rndseed_64bit2 {
6956: my ($symb,$courseid,$domain,$username)=@_;
6957: {
6958: use integer;
6959: # strings need to be an even # of cahracters long, it it is odd the
6960: # last characters gets thrown away
6961: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6962: my $symbseed=numval($symb) << 10;
6963: my $namechck=unpack("%32S*",$username.' ');
6964:
6965: my $nameseed=numval($username) << 21;
6966: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6967: my $courseseed=unpack("%32S*",$courseid.' ');
6968:
6969: my $num1=$symbchck+$symbseed+$namechck;
6970: my $num2=$nameseed+$domainseed+$courseseed;
6971: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6972: #&logthis("rndseed :$num:$symb");
6973: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6974: return "$num1,$num2";
6975: }
6976: }
6977:
6978: sub rndseed_64bit3 {
6979: my ($symb,$courseid,$domain,$username)=@_;
6980: {
6981: use integer;
6982: # strings need to be an even # of cahracters long, it it is odd the
6983: # last characters gets thrown away
6984: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6985: my $symbseed=numval2($symb) << 10;
6986: my $namechck=unpack("%32S*",$username.' ');
6987:
6988: my $nameseed=numval2($username) << 21;
6989: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6990: my $courseseed=unpack("%32S*",$courseid.' ');
6991:
6992: my $num1=$symbchck+$symbseed+$namechck;
6993: my $num2=$nameseed+$domainseed+$courseseed;
6994: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6995: #&logthis("rndseed :$num1:$num2:$_64bit");
6996: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6997:
6998: return "$num1:$num2";
6999: }
7000: }
7001:
7002: sub rndseed_64bit4 {
7003: my ($symb,$courseid,$domain,$username)=@_;
7004: {
7005: use integer;
7006: # strings need to be an even # of cahracters long, it it is odd the
7007: # last characters gets thrown away
7008: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7009: my $symbseed=numval3($symb) << 10;
7010: my $namechck=unpack("%32S*",$username.' ');
7011:
7012: my $nameseed=numval3($username) << 21;
7013: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7014: my $courseseed=unpack("%32S*",$courseid.' ');
7015:
7016: my $num1=$symbchck+$symbseed+$namechck;
7017: my $num2=$nameseed+$domainseed+$courseseed;
7018: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7019: #&logthis("rndseed :$num1:$num2:$_64bit");
7020: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7021:
7022: return "$num1:$num2";
7023: }
7024: }
7025:
7026: sub rndseed_64bit5 {
7027: my ($symb,$courseid,$domain,$username)=@_;
7028: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
7029: return "$num1:$num2";
7030: }
7031:
7032: sub rndseed_CODE_64bit {
7033: my ($symb,$courseid,$domain,$username)=@_;
7034: {
7035: use integer;
7036: my $symbchck=unpack("%32S*",$symb.' ') << 16;
7037: my $symbseed=numval2($symb);
7038: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
7039: my $CODEseed=numval(&getCODE());
7040: my $courseseed=unpack("%32S*",$courseid.' ');
7041: my $num1=$symbseed+$CODEchck;
7042: my $num2=$CODEseed+$courseseed+$symbchck;
7043: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
7044: #&logthis("rndseed :$num1:$num2:$symb");
7045: if ($_64bit) { $num1=(($num1<<32)>>32); }
7046: if ($_64bit) { $num2=(($num2<<32)>>32); }
7047: return "$num1:$num2";
7048: }
7049: }
7050:
7051: sub rndseed_CODE_64bit4 {
7052: my ($symb,$courseid,$domain,$username)=@_;
7053: {
7054: use integer;
7055: my $symbchck=unpack("%32S*",$symb.' ') << 16;
7056: my $symbseed=numval3($symb);
7057: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
7058: my $CODEseed=numval3(&getCODE());
7059: my $courseseed=unpack("%32S*",$courseid.' ');
7060: my $num1=$symbseed+$CODEchck;
7061: my $num2=$CODEseed+$courseseed+$symbchck;
7062: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
7063: #&logthis("rndseed :$num1:$num2:$symb");
7064: if ($_64bit) { $num1=(($num1<<32)>>32); }
7065: if ($_64bit) { $num2=(($num2<<32)>>32); }
7066: return "$num1:$num2";
7067: }
7068: }
7069:
7070: sub rndseed_CODE_64bit5 {
7071: my ($symb,$courseid,$domain,$username)=@_;
7072: my $code = &getCODE();
7073: my ($num1,$num2)=&digest("$symb,$courseid,$code");
7074: return "$num1:$num2";
7075: }
7076:
7077: sub setup_random_from_rndseed {
7078: my ($rndseed)=@_;
7079: if ($rndseed =~/([,:])/) {
7080: my ($num1,$num2)=split(/[,:]/,$rndseed);
7081: &Math::Random::random_set_seed(abs($num1),abs($num2));
7082: } else {
7083: &Math::Random::random_set_seed_from_phrase($rndseed);
7084: }
7085: }
7086:
7087: sub latest_receipt_algorithm_id {
7088: return 'receipt2';
7089: }
7090:
7091: sub recunique {
7092: my $fucourseid=shift;
7093: my $unique;
7094: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
7095: $unique=$env{"course.$fucourseid.internal.encseed"};
7096: } else {
7097: $unique=$perlvar{'lonReceipt'};
7098: }
7099: return unpack("%32C*",$unique);
7100: }
7101:
7102: sub recprefix {
7103: my $fucourseid=shift;
7104: my $prefix;
7105: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
7106: $prefix=$env{"course.$fucourseid.internal.encpref"};
7107: } else {
7108: $prefix=$perlvar{'lonHostID'};
7109: }
7110: return unpack("%32C*",$prefix);
7111: }
7112:
7113: sub ireceipt {
7114: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
7115: my $cuname=unpack("%32C*",$funame);
7116: my $cudom=unpack("%32C*",$fudom);
7117: my $cucourseid=unpack("%32C*",$fucourseid);
7118: my $cusymb=unpack("%32C*",$fusymb);
7119: my $cunique=&recunique($fucourseid);
7120: my $cpart=unpack("%32S*",$part);
7121: my $return =&recprefix($fucourseid).'-';
7122: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
7123: $env{'request.state'} eq 'construct') {
7124: #&logthis("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname)." and ".($cpart%$cudom));
7125:
7126: $return.= ($cunique%$cuname+
7127: $cunique%$cudom+
7128: $cusymb%$cuname+
7129: $cusymb%$cudom+
7130: $cucourseid%$cuname+
7131: $cucourseid%$cudom+
7132: $cpart%$cuname+
7133: $cpart%$cudom);
7134: } else {
7135: $return.= ($cunique%$cuname+
7136: $cunique%$cudom+
7137: $cusymb%$cuname+
7138: $cusymb%$cudom+
7139: $cucourseid%$cuname+
7140: $cucourseid%$cudom);
7141: }
7142: return $return;
7143: }
7144:
7145: sub receipt {
7146: my ($part)=@_;
7147: my ($symb,$courseid,$domain,$name) = &whichuser();
7148: return &ireceipt($name,$domain,$courseid,$symb,$part);
7149: }
7150:
7151: sub whichuser {
7152: my ($passedsymb)=@_;
7153: my ($symb,$courseid,$domain,$name,$publicuser);
7154: if (defined($env{'form.grade_symb'})) {
7155: my ($tmp_courseid)=&get_env_multiple('form.grade_courseid');
7156: my $allowed=&allowed('vgr',$tmp_courseid);
7157: if (!$allowed &&
7158: exists($env{'request.course.sec'}) &&
7159: $env{'request.course.sec'} !~ /^\s*$/) {
7160: $allowed=&allowed('vgr',$tmp_courseid.
7161: '/'.$env{'request.course.sec'});
7162: }
7163: if ($allowed) {
7164: ($symb)=&get_env_multiple('form.grade_symb');
7165: $courseid=$tmp_courseid;
7166: ($domain)=&get_env_multiple('form.grade_domain');
7167: ($name)=&get_env_multiple('form.grade_username');
7168: return ($symb,$courseid,$domain,$name,$publicuser);
7169: }
7170: }
7171: if (!$passedsymb) {
7172: $symb=&symbread();
7173: } else {
7174: $symb=$passedsymb;
7175: }
7176: $courseid=$env{'request.course.id'};
7177: $domain=$env{'user.domain'};
7178: $name=$env{'user.name'};
7179: if ($name eq 'public' && $domain eq 'public') {
7180: if (!defined($env{'form.username'})) {
7181: $env{'form.username'}.=time.rand(10000000);
7182: }
7183: $name.=$env{'form.username'};
7184: }
7185: return ($symb,$courseid,$domain,$name,$publicuser);
7186:
7187: }
7188:
7189: # ------------------------------------------------------------ Serves up a file
7190: # returns either the contents of the file or
7191: # -1 if the file doesn't exist
7192: #
7193: # if the target is a file that was uploaded via DOCS,
7194: # a check will be made to see if a current copy exists on the local server,
7195: # if it does this will be served, otherwise a copy will be retrieved from
7196: # the home server for the course and stored in /home/httpd/html/userfiles on
7197: # the local server.
7198:
7199: sub getfile {
7200: my ($file) = @_;
7201: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
7202: &repcopy($file);
7203: return &readfile($file);
7204: }
7205:
7206: sub repcopy_userfile {
7207: my ($file)=@_;
7208: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
7209: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
7210: my ($cdom,$cnum,$filename) =
7211: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+($match_domain)/+($match_name)/+(.*)|);
7212: my $uri="/uploaded/$cdom/$cnum/$filename";
7213: if (-e "$file") {
7214: # we already have a local copy, check it out
7215: my @fileinfo = stat($file);
7216: my $rtncode;
7217: my $info;
7218: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
7219: if ($lwpresp ne 'ok') {
7220: # there is no such file anymore, even though we had a local copy
7221: if ($rtncode eq '404') {
7222: unlink($file);
7223: }
7224: return -1;
7225: }
7226: if ($info < $fileinfo[9]) {
7227: # nice, the file we have is up-to-date, just say okay
7228: return 'ok';
7229: } else {
7230: # the file is outdated, get rid of it
7231: unlink($file);
7232: }
7233: }
7234: # one way or the other, at this point, we don't have the file
7235: # construct the correct path for the file
7236: my @parts = ($cdom,$cnum);
7237: if ($filename =~ m|^(.+)/[^/]+$|) {
7238: push @parts, split(/\//,$1);
7239: }
7240: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
7241: foreach my $part (@parts) {
7242: $path .= '/'.$part;
7243: if (!-e $path) {
7244: mkdir($path,0770);
7245: }
7246: }
7247: # now the path exists for sure
7248: # get a user agent
7249: my $ua=new LWP::UserAgent;
7250: my $transferfile=$file.'.in.transfer';
7251: # FIXME: this should flock
7252: if (-e $transferfile) { return 'ok'; }
7253: my $request;
7254: $uri=~s/^\///;
7255: $request=new HTTP::Request('GET','http://'.$hostname{&homeserver($cnum,$cdom)}.'/raw/'.$uri);
7256: my $response=$ua->request($request,$transferfile);
7257: # did it work?
7258: if ($response->is_error()) {
7259: unlink($transferfile);
7260: &logthis("Userfile repcopy failed for $uri");
7261: return -1;
7262: }
7263: # worked, rename the transfer file
7264: rename($transferfile,$file);
7265: return 'ok';
7266: }
7267:
7268: sub tokenwrapper {
7269: my $uri=shift;
7270: $uri=~s|^http\://([^/]+)||;
7271: $uri=~s|^/||;
7272: $env{'user.environment'}=~/\/([^\/]+)\.id/;
7273: my $token=$1;
7274: my (undef,$udom,$uname,$file)=split('/',$uri,4);
7275: if ($udom && $uname && $file) {
7276: $file=~s|(\?\.*)*$||;
7277: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
7278: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
7279: (($uri=~/\?/)?'&':'?').'token='.$token.
7280: '&tokenissued='.$perlvar{'lonHostID'};
7281: } else {
7282: return '/adm/notfound.html';
7283: }
7284: }
7285:
7286: # call with reqtype HEAD: get last modification time
7287: # call with reqtype GET: get the file contents
7288: # Do not call this with reqtype GET for large files! It loads everything into memory
7289: #
7290: sub getuploaded {
7291: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
7292: $uri=~s/^\///;
7293: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
7294: my $ua=new LWP::UserAgent;
7295: my $request=new HTTP::Request($reqtype,$uri);
7296: my $response=$ua->request($request);
7297: $$rtncode = $response->code;
7298: if (! $response->is_success()) {
7299: return 'failed';
7300: }
7301: if ($reqtype eq 'HEAD') {
7302: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
7303: } elsif ($reqtype eq 'GET') {
7304: $$info = $response->content;
7305: }
7306: return 'ok';
7307: }
7308:
7309: sub readfile {
7310: my $file = shift;
7311: if ( (! -e $file ) || ($file eq '') ) { return -1; };
7312: my $fh;
7313: open($fh,"<$file");
7314: my $a='';
7315: while (my $line = <$fh>) { $a .= $line; }
7316: return $a;
7317: }
7318:
7319: sub filelocation {
7320: my ($dir,$file) = @_;
7321: my $location;
7322: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
7323:
7324: if ($file =~ m-^/adm/-) {
7325: $file=~s-^/adm/wrapper/-/-;
7326: $file=~s-^/adm/coursedocs/showdoc/-/-;
7327: }
7328: if ($file=~m:^/~:) { # is a contruction space reference
7329: $location = $file;
7330: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
7331: } elsif ($file=~m{^/home/$match_username/public_html/}) {
7332: # is a correct contruction space reference
7333: $location = $file;
7334: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
7335: my ($udom,$uname,$filename)=
7336: ($file=~m -^/+(?:uploaded|editupload)/+($match_domain)/+($match_name)/+(.*)$-);
7337: my $home=&homeserver($uname,$udom);
7338: my $is_me=0;
7339: my @ids=¤t_machine_ids();
7340: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
7341: if ($is_me) {
7342: $location=&propath($udom,$uname).
7343: '/userfiles/'.$filename;
7344: } else {
7345: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
7346: $udom.'/'.$uname.'/'.$filename;
7347: }
7348: } else {
7349: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7350: $file=~s:^/res/:/:;
7351: if ( !( $file =~ m:^/:) ) {
7352: $location = $dir. '/'.$file;
7353: } else {
7354: $location = '/home/httpd/html/res'.$file;
7355: }
7356: }
7357: $location=~s://+:/:g; # remove duplicate /
7358: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
7359: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
7360: return $location;
7361: }
7362:
7363: sub hreflocation {
7364: my ($dir,$file)=@_;
7365: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
7366: $file=filelocation($dir,$file);
7367: } elsif ($file=~m-^/adm/-) {
7368: $file=~s-^/adm/wrapper/-/-;
7369: $file=~s-^/adm/coursedocs/showdoc/-/-;
7370: }
7371: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
7372: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
7373: } elsif ($file=~m-/home/($match_username)/public_html/-) {
7374: $file=~s-^/home/($match_username)/public_html/-/~$1/-;
7375: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
7376: $file=~s-^/home/httpd/lonUsers/($match_domain)/./././($match_name)/userfiles/
7377: -/uploaded/$1/$2/-x;
7378: }
7379: return $file;
7380: }
7381:
7382: sub current_machine_domains {
7383: my $hostname=$hostname{$perlvar{'lonHostID'}};
7384: my @domains;
7385: while( my($id, $name) = each(%hostname)) {
7386: # &logthis("-$id-$name-$hostname-");
7387: if ($hostname eq $name) {
7388: push(@domains,$hostdom{$id});
7389: }
7390: }
7391: return @domains;
7392: }
7393:
7394: sub current_machine_ids {
7395: my $hostname=$hostname{$perlvar{'lonHostID'}};
7396: my @ids;
7397: while( my($id, $name) = each(%hostname)) {
7398: # &logthis("-$id-$name-$hostname-");
7399: if ($hostname eq $name) {
7400: push(@ids,$id);
7401: }
7402: }
7403: return @ids;
7404: }
7405:
7406: sub additional_machine_domains {
7407: my @domains;
7408: open(my $fh,"<$perlvar{'lonTabDir'}/expected_domains.tab");
7409: while( my $line = <$fh>) {
7410: $line =~ s/\s//g;
7411: push(@domains,$line);
7412: }
7413: return @domains;
7414: }
7415:
7416: sub default_login_domain {
7417: my $domain = $perlvar{'lonDefDomain'};
7418: my $testdomain=(split(/\./,$ENV{'HTTP_HOST'}))[0];
7419: foreach my $posdom (¤t_machine_domains(),
7420: &additional_machine_domains()) {
7421: if (lc($posdom) eq lc($testdomain)) {
7422: $domain=$posdom;
7423: last;
7424: }
7425: }
7426: return $domain;
7427: }
7428:
7429: # ------------------------------------------------------------- Declutters URLs
7430:
7431: sub declutter {
7432: my $thisfn=shift;
7433: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
7434: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7435: $thisfn=~s/^\///;
7436: $thisfn=~s|^adm/wrapper/||;
7437: $thisfn=~s|^adm/coursedocs/showdoc/||;
7438: $thisfn=~s/^res\///;
7439: $thisfn=~s/\?.+$//;
7440: return $thisfn;
7441: }
7442:
7443: # ------------------------------------------------------------- Clutter up URLs
7444:
7445: sub clutter {
7446: my $thisfn='/'.&declutter(shift);
7447: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
7448: $thisfn='/res'.$thisfn;
7449: }
7450: if ($thisfn !~m|/adm|) {
7451: if ($thisfn =~ m|/ext/|) {
7452: $thisfn='/adm/wrapper'.$thisfn;
7453: } else {
7454: my ($ext) = ($thisfn =~ /\.(\w+)$/);
7455: my $embstyle=&Apache::loncommon::fileembstyle($ext);
7456: if ($embstyle eq 'ssi'
7457: || ($embstyle eq 'hdn')
7458: || ($embstyle eq 'rat')
7459: || ($embstyle eq 'prv')
7460: || ($embstyle eq 'ign')) {
7461: #do nothing with these
7462: } elsif (($embstyle eq 'img')
7463: || ($embstyle eq 'emb')
7464: || ($embstyle eq 'wrp')) {
7465: $thisfn='/adm/wrapper'.$thisfn;
7466: } elsif ($embstyle eq 'unk'
7467: && $thisfn!~/\.(sequence|page)$/) {
7468: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
7469: } else {
7470: # &logthis("Got a blank emb style");
7471: }
7472: }
7473: }
7474: return $thisfn;
7475: }
7476:
7477: sub clutter_with_no_wrapper {
7478: my $uri = &clutter(shift);
7479: if ($uri =~ m-^/adm/-) {
7480: $uri =~ s-^/adm/wrapper/-/-;
7481: $uri =~ s-^/adm/coursedocs/showdoc/-/-;
7482: }
7483: return $uri;
7484: }
7485:
7486: sub freeze_escape {
7487: my ($value)=@_;
7488: if (ref($value)) {
7489: $value=&nfreeze($value);
7490: return '__FROZEN__'.&escape($value);
7491: }
7492: return &escape($value);
7493: }
7494:
7495:
7496: sub thaw_unescape {
7497: my ($value)=@_;
7498: if ($value =~ /^__FROZEN__/) {
7499: substr($value,0,10,undef);
7500: $value=&unescape($value);
7501: return &thaw($value);
7502: }
7503: return &unescape($value);
7504: }
7505:
7506: sub correct_line_ends {
7507: my ($result)=@_;
7508: $$result =~s/\r\n/\n/mg;
7509: $$result =~s/\r/\n/mg;
7510: }
7511: # ================================================================ Main Program
7512:
7513: sub goodbye {
7514: &logthis("Starting Shut down");
7515: #not converted to using infrastruture and probably shouldn't be
7516: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
7517: #converted
7518: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
7519: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
7520: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
7521: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
7522: #1.1 only
7523: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
7524: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
7525: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
7526: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
7527: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
7528: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
7529: &logthis(sprintf("%-20s is %s",'hits',$hits));
7530: &flushcourselogs();
7531: &logthis("Shutting down");
7532: }
7533:
7534: BEGIN {
7535: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
7536: unless ($readit) {
7537: {
7538: my $configvars = LONCAPA::Configuration::read_conf('loncapa.conf');
7539: %perlvar = (%perlvar,%{$configvars});
7540: }
7541:
7542: # ------------------------------------------------------------ Read domain file
7543: {
7544: %domaindescription = ();
7545: %domain_auth_def = ();
7546: %domain_auth_arg_def = ();
7547: my $fh;
7548: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
7549: while (my $line = <$fh>) {
7550: next if ($line =~ /^(\#|\s*$)/);
7551: # next if /^\#/;
7552: chomp $line;
7553: my ($domain, $domain_description, $def_auth, $def_auth_arg,
7554: $def_lang, $city, $longi, $lati, $primary) = split(/:/,$line,9);
7555: $domain_auth_def{$domain}=$def_auth;
7556: $domain_auth_arg_def{$domain}=$def_auth_arg;
7557: $domaindescription{$domain}=$domain_description;
7558: $domain_lang_def{$domain}=$def_lang;
7559: $domain_city{$domain}=$city;
7560: $domain_longi{$domain}=$longi;
7561: $domain_lati{$domain}=$lati;
7562: $domain_primary{$domain}=$primary;
7563:
7564: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
7565: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
7566: }
7567: }
7568: close ($fh);
7569: }
7570:
7571:
7572: # ------------------------------------------------------------- Read hosts file
7573: {
7574: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
7575:
7576: while (my $configline=<$config>) {
7577: next if ($configline =~ /^(\#|\s*$)/);
7578: chomp($configline);
7579: my ($id,$domain,$role,$name)=split(/:/,$configline);
7580: $name=~s/\s//g;
7581: if ($id && $domain && $role && $name) {
7582: $hostname{$id}=$name;
7583: $hostdom{$id}=$domain;
7584: if ($role eq 'library') { $libserv{$id}=$name; }
7585: }
7586: }
7587: close($config);
7588: # FIXME: dev server don't want this, production servers _do_ want this
7589: #&get_iphost();
7590: }
7591:
7592: sub get_iphost {
7593: if (%iphost) { return %iphost; }
7594: my %name_to_ip;
7595: foreach my $id (keys(%hostname)) {
7596: my $name=$hostname{$id};
7597: my $ip;
7598: if (!exists($name_to_ip{$name})) {
7599: $ip = gethostbyname($name);
7600: if (!$ip || length($ip) ne 4) {
7601: &logthis("Skipping host $id name $name no IP found");
7602: next;
7603: }
7604: $ip=inet_ntoa($ip);
7605: $name_to_ip{$name} = $ip;
7606: } else {
7607: $ip = $name_to_ip{$name};
7608: }
7609: push(@{$iphost{$ip}},$id);
7610: }
7611: return %iphost;
7612: }
7613:
7614: # ------------------------------------------------------ Read spare server file
7615: {
7616: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
7617:
7618: while (my $configline=<$config>) {
7619: chomp($configline);
7620: if ($configline) {
7621: my ($host,$type) = split(':',$configline,2);
7622: if (!defined($type) || $type eq '') { $type = 'default' };
7623: push(@{ $spareid{$type} }, $host);
7624: }
7625: }
7626: close($config);
7627: }
7628: # ------------------------------------------------------------ Read permissions
7629: {
7630: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
7631:
7632: while (my $configline=<$config>) {
7633: chomp($configline);
7634: if ($configline) {
7635: my ($role,$perm)=split(/ /,$configline);
7636: if ($perm ne '') { $pr{$role}=$perm; }
7637: }
7638: }
7639: close($config);
7640: }
7641:
7642: # -------------------------------------------- Read plain texts for permissions
7643: {
7644: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
7645:
7646: while (my $configline=<$config>) {
7647: chomp($configline);
7648: if ($configline) {
7649: my ($short,@plain)=split(/:/,$configline);
7650: %{$prp{$short}} = ();
7651: if (@plain > 0) {
7652: $prp{$short}{'std'} = $plain[0];
7653: for (my $i=1; $i<@plain; $i++) {
7654: $prp{$short}{'alt'.$i} = $plain[$i];
7655: }
7656: }
7657: }
7658: }
7659: close($config);
7660: }
7661:
7662: # ---------------------------------------------------------- Read package table
7663: {
7664: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
7665:
7666: while (my $configline=<$config>) {
7667: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
7668: chomp($configline);
7669: my ($short,$plain)=split(/:/,$configline);
7670: my ($pack,$name)=split(/\&/,$short);
7671: if ($plain ne '') {
7672: $packagetab{$pack.'&'.$name.'&name'}=$name;
7673: $packagetab{$short}=$plain;
7674: }
7675: }
7676: close($config);
7677: }
7678:
7679: # ------------- set up temporary directory
7680: {
7681: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
7682:
7683: }
7684:
7685: $memcache=new Cache::Memcached({'servers' => ['127.0.0.1:11211'],
7686: 'compress_threshold'=> 20_000,
7687: });
7688:
7689: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
7690: $dumpcount=0;
7691:
7692: &logtouch();
7693: &logthis('<font color="yellow">INFO: Read configuration</font>');
7694: $readit=1;
7695: {
7696: use integer;
7697: my $test=(2**32)+1;
7698: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
7699: &logthis(" Detected 64bit platform ($_64bit)");
7700: }
7701: }
7702: }
7703:
7704: 1;
7705: __END__
7706:
7707: =pod
7708:
7709: =head1 NAME
7710:
7711: Apache::lonnet - Subroutines to ask questions about things in the network.
7712:
7713: =head1 SYNOPSIS
7714:
7715: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
7716:
7717: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
7718:
7719: Common parameters:
7720:
7721: =over 4
7722:
7723: =item *
7724:
7725: $uname : an internal username (if $cname expecting a course Id specifically)
7726:
7727: =item *
7728:
7729: $udom : a domain (if $cdom expecting a course's domain specifically)
7730:
7731: =item *
7732:
7733: $symb : a resource instance identifier
7734:
7735: =item *
7736:
7737: $namespace : the name of a .db file that contains the data needed or
7738: being set.
7739:
7740: =back
7741:
7742: =head1 OVERVIEW
7743:
7744: lonnet provides subroutines which interact with the
7745: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
7746: about classes, users, and resources.
7747:
7748: For many of these objects you can also use this to store data about
7749: them or modify them in various ways.
7750:
7751: =head2 Symbs
7752:
7753: To identify a specific instance of a resource, LON-CAPA uses symbols
7754: or "symbs"X<symb>. These identifiers are built from the URL of the
7755: map, the resource number of the resource in the map, and the URL of
7756: the resource itself. The latter is somewhat redundant, but might help
7757: if maps change.
7758:
7759: An example is
7760:
7761: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
7762:
7763: The respective map entry is
7764:
7765: <resource id="19" src="/res/msu/korte/tests/part12.problem"
7766: title="Problem 2">
7767: </resource>
7768:
7769: Symbs are used by the random number generator, as well as to store and
7770: restore data specific to a certain instance of for example a problem.
7771:
7772: =head2 Storing And Retrieving Data
7773:
7774: X<store()>X<cstore()>X<restore()>Three of the most important functions
7775: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
7776: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
7777: is is the non-critical message twin of cstore. These functions are for
7778: handlers to store a perl hash to a user's permanent data space in an
7779: easy manner, and to retrieve it again on another call. It is expected
7780: that a handler would use this once at the beginning to retrieve data,
7781: and then again once at the end to send only the new data back.
7782:
7783: The data is stored in the user's data directory on the user's
7784: homeserver under the ID of the course.
7785:
7786: The hash that is returned by restore will have all of the previous
7787: value for all of the elements of the hash.
7788:
7789: Example:
7790:
7791: #creating a hash
7792: my %hash;
7793: $hash{'foo'}='bar';
7794:
7795: #storing it
7796: &Apache::lonnet::cstore(\%hash);
7797:
7798: #changing a value
7799: $hash{'foo'}='notbar';
7800:
7801: #adding a new value
7802: $hash{'bar'}='foo';
7803: &Apache::lonnet::cstore(\%hash);
7804:
7805: #retrieving the hash
7806: my %history=&Apache::lonnet::restore();
7807:
7808: #print the hash
7809: foreach my $key (sort(keys(%history))) {
7810: print("\%history{$key} = $history{$key}");
7811: }
7812:
7813: Will print out:
7814:
7815: %history{1:foo} = bar
7816: %history{1:keys} = foo:timestamp
7817: %history{1:timestamp} = 990455579
7818: %history{2:bar} = foo
7819: %history{2:foo} = notbar
7820: %history{2:keys} = foo:bar:timestamp
7821: %history{2:timestamp} = 990455580
7822: %history{bar} = foo
7823: %history{foo} = notbar
7824: %history{timestamp} = 990455580
7825: %history{version} = 2
7826:
7827: Note that the special hash entries C<keys>, C<version> and
7828: C<timestamp> were added to the hash. C<version> will be equal to the
7829: total number of versions of the data that have been stored. The
7830: C<timestamp> attribute will be the UNIX time the hash was
7831: stored. C<keys> is available in every historical section to list which
7832: keys were added or changed at a specific historical revision of a
7833: hash.
7834:
7835: B<Warning>: do not store the hash that restore returns directly. This
7836: will cause a mess since it will restore the historical keys as if the
7837: were new keys. I.E. 1:foo will become 1:1:foo etc.
7838:
7839: Calling convention:
7840:
7841: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
7842: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
7843:
7844: For more detailed information, see lonnet specific documentation.
7845:
7846: =head1 RETURN MESSAGES
7847:
7848: =over 4
7849:
7850: =item * B<con_lost>: unable to contact remote host
7851:
7852: =item * B<con_delayed>: unable to contact remote host, message will be delivered
7853: when the connection is brought back up
7854:
7855: =item * B<con_failed>: unable to contact remote host and unable to save message
7856: for later delivery
7857:
7858: =item * B<error:>: an error a occured, a description of the error follows the :
7859:
7860: =item * B<no_such_host>: unable to fund a host associated with the user/domain
7861: that was requested
7862:
7863: =back
7864:
7865: =head1 PUBLIC SUBROUTINES
7866:
7867: =head2 Session Environment Functions
7868:
7869: =over 4
7870:
7871: =item *
7872: X<appenv()>
7873: B<appenv(%hash)>: the value of %hash is written to
7874: the user envirnoment file, and will be restored for each access this
7875: user makes during this session, also modifies the %env for the current
7876: process
7877:
7878: =item *
7879: X<delenv()>
7880: B<delenv($regexp)>: removes all items from the session
7881: environment file that matches the regular expression in $regexp. The
7882: values are also delted from the current processes %env.
7883:
7884: =item * get_env_multiple($name)
7885:
7886: gets $name from the %env hash, it seemlessly handles the cases where multiple
7887: values may be defined and end up as an array ref.
7888:
7889: returns an array of values
7890:
7891: =back
7892:
7893: =head2 User Information
7894:
7895: =over 4
7896:
7897: =item *
7898: X<queryauthenticate()>
7899: B<queryauthenticate($uname,$udom)>: try to determine user's current
7900: authentication scheme
7901:
7902: =item *
7903: X<authenticate()>
7904: B<authenticate($uname,$upass,$udom)>: try to
7905: authenticate user from domain's lib servers (first use the current
7906: one). C<$upass> should be the users password.
7907:
7908: =item *
7909: X<homeserver()>
7910: B<homeserver($uname,$udom)>: find the server which has
7911: the user's directory and files (there must be only one), this caches
7912: the answer, and also caches if there is a borken connection.
7913:
7914: =item *
7915: X<idget()>
7916: B<idget($udom,@ids)>: find the usernames behind a list of IDs
7917: (IDs are a unique resource in a domain, there must be only 1 ID per
7918: username, and only 1 username per ID in a specific domain) (returns
7919: hash: id=>name,id=>name)
7920:
7921: =item *
7922: X<idrget()>
7923: B<idrget($udom,@unames)>: find the IDs behind a list of
7924: usernames (returns hash: name=>id,name=>id)
7925:
7926: =item *
7927: X<idput()>
7928: B<idput($udom,%ids)>: store away a list of names and associated IDs
7929:
7930: =item *
7931: X<rolesinit()>
7932: B<rolesinit($udom,$username,$authhost)>: get user privileges
7933:
7934: =item *
7935: X<getsection()>
7936: B<getsection($udom,$uname,$cname)>: finds the section of student in the
7937: course $cname, return section name/number or '' for "not in course"
7938: and '-1' for "no section"
7939:
7940: =item *
7941: X<userenvironment()>
7942: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
7943: passed in @what from the requested user's environment, returns a hash
7944:
7945: =back
7946:
7947: =head2 User Roles
7948:
7949: =over 4
7950:
7951: =item *
7952:
7953: allowed($priv,$uri,$symb,$role) : check for a user privilege; returns codes for allowed actions
7954: F: full access
7955: U,I,K: authentication modes (cxx only)
7956: '': forbidden
7957: 1: user needs to choose course
7958: 2: browse allowed
7959: A: passphrase authentication needed
7960:
7961: =item *
7962:
7963: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
7964: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
7965: and course level
7966:
7967: =item *
7968:
7969: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
7970: explanation of a user role term
7971:
7972: =item *
7973:
7974: get_my_roles($uname,$udom,$types,$roles,$roledoms) : All arguments are
7975: optional. Returns a hash of a user's roles, with keys set to
7976: colon-sparated $uname,$udom,and $role, and value set to
7977: colon-separated start and end times for the role. If no username and
7978: domain are specified, will default to current user/domain. Types,
7979: roles, and roledoms are references to arrays, of role statuses
7980: (active, future or previous), roles (e.g., cc,in, st etc.) and domains
7981: of the roles which can be used to restrict the list if roles
7982: reported. If no array ref is provided for types, will default to
7983: return only active roles.
7984:
7985: =back
7986:
7987: =head2 User Modification
7988:
7989: =over 4
7990:
7991: =item *
7992:
7993: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
7994: user for the level given by URL. Optional start and end dates (leave empty
7995: string or zero for "no date")
7996:
7997: =item *
7998:
7999: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
8000: change a users, password, possible return values are: ok,
8001: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
8002: refused
8003:
8004: =item *
8005:
8006: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
8007:
8008: =item *
8009:
8010: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
8011: modify user
8012:
8013: =item *
8014:
8015: modifystudent
8016:
8017: modify a students enrollment and identification information.
8018: The course id is resolved based on the current users environment.
8019: This means the envoking user must be a course coordinator or otherwise
8020: associated with a course.
8021:
8022: This call is essentially a wrapper for lonnet::modifyuser and
8023: lonnet::modify_student_enrollment
8024:
8025: Inputs:
8026:
8027: =over 4
8028:
8029: =item B<$udom> Students loncapa domain
8030:
8031: =item B<$uname> Students loncapa login name
8032:
8033: =item B<$uid> Students id/student number
8034:
8035: =item B<$umode> Students authentication mode
8036:
8037: =item B<$upass> Students password
8038:
8039: =item B<$first> Students first name
8040:
8041: =item B<$middle> Students middle name
8042:
8043: =item B<$last> Students last name
8044:
8045: =item B<$gene> Students generation
8046:
8047: =item B<$usec> Students section in course
8048:
8049: =item B<$end> Unix time of the roles expiration
8050:
8051: =item B<$start> Unix time of the roles start date
8052:
8053: =item B<$forceid> If defined, allow $uid to be changed
8054:
8055: =item B<$desiredhome> server to use as home server for student
8056:
8057: =back
8058:
8059: =item *
8060:
8061: modify_student_enrollment
8062:
8063: Change a students enrollment status in a class. The environment variable
8064: 'role.request.course' must be defined for this function to proceed.
8065:
8066: Inputs:
8067:
8068: =over 4
8069:
8070: =item $udom, students domain
8071:
8072: =item $uname, students name
8073:
8074: =item $uid, students user id
8075:
8076: =item $first, students first name
8077:
8078: =item $middle
8079:
8080: =item $last
8081:
8082: =item $gene
8083:
8084: =item $usec
8085:
8086: =item $end
8087:
8088: =item $start
8089:
8090: =back
8091:
8092:
8093: =item *
8094:
8095: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
8096: custom role; give a custom role to a user for the level given by URL. Specify
8097: name and domain of role author, and role name
8098:
8099: =item *
8100:
8101: revokerole($udom,$uname,$url,$role) : revoke a role for url
8102:
8103: =item *
8104:
8105: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
8106:
8107: =back
8108:
8109: =head2 Course Infomation
8110:
8111: =over 4
8112:
8113: =item *
8114:
8115: coursedescription($courseid) : returns a hash of information about the
8116: specified course id, including all environment settings for the
8117: course, the description of the course will be in the hash under the
8118: key 'description'
8119:
8120: =item *
8121:
8122: resdata($name,$domain,$type,@which) : request for current parameter
8123: setting for a specific $type, where $type is either 'course' or 'user',
8124: @what should be a list of parameters to ask about. This routine caches
8125: answers for 5 minutes.
8126:
8127: =back
8128:
8129: =head2 Course Modification
8130:
8131: =over 4
8132:
8133: =item *
8134:
8135: writecoursepref($courseid,%prefs) : write preferences (environment
8136: database) for a course
8137:
8138: =item *
8139:
8140: createcourse($udom,$description,$url) : make/modify course
8141:
8142: =back
8143:
8144: =head2 Resource Subroutines
8145:
8146: =over 4
8147:
8148: =item *
8149:
8150: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
8151:
8152: =item *
8153:
8154: repcopy($filename) : subscribes to the requested file, and attempts to
8155: replicate from the owning library server, Might return
8156: 'unavailable', 'not_found', 'forbidden', 'ok', or
8157: 'bad_request', also attempts to grab the metadata for the
8158: resource. Expects the local filesystem pathname
8159: (/home/httpd/html/res/....)
8160:
8161: =back
8162:
8163: =head2 Resource Information
8164:
8165: =over 4
8166:
8167: =item *
8168:
8169: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
8170: a vairety of different possible values, $varname should be a request
8171: string, and the other parameters can be used to specify who and what
8172: one is asking about.
8173:
8174: Possible values for $varname are environment.lastname (or other item
8175: from the envirnment hash), user.name (or someother aspect about the
8176: user), resource.0.maxtries (or some other part and parameter of a
8177: resource)
8178:
8179: =item *
8180:
8181: directcondval($number) : get current value of a condition; reads from a state
8182: string
8183:
8184: =item *
8185:
8186: condval($condidx) : value of condition index based on state
8187:
8188: =item *
8189:
8190: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
8191: resource's metadata, $what should be either a specific key, or either
8192: 'keys' (to get a list of possible keys) or 'packages' to get a list of
8193: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
8194:
8195: this function automatically caches all requests
8196:
8197: =item *
8198:
8199: metadata_query($query,$custom,$customshow) : make a metadata query against the
8200: network of library servers; returns file handle of where SQL and regex results
8201: will be stored for query
8202:
8203: =item *
8204:
8205: symbread($filename) : return symbolic list entry (filename argument optional);
8206: returns the data handle
8207:
8208: =item *
8209:
8210: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
8211: a possible symb for the URL in $thisfn, and if is an encryypted
8212: resource that the user accessed using /enc/ returns a 1 on success, 0
8213: on failure, user must be in a course, as it assumes the existance of
8214: the course initial hash, and uses $env('request.course.id'}
8215:
8216:
8217: =item *
8218:
8219: symbclean($symb) : removes versions numbers from a symb, returns the
8220: cleaned symb
8221:
8222: =item *
8223:
8224: is_on_map($uri) : checks if the $uri is somewhere on the current
8225: course map, user must be in a course for it to work.
8226:
8227: =item *
8228:
8229: numval($salt) : return random seed value (addend for rndseed)
8230:
8231: =item *
8232:
8233: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
8234: a random seed, all arguments are optional, if they aren't sent it uses the
8235: environment to derive them. Note: if symb isn't sent and it can't get one
8236: from &symbread it will use the current time as its return value
8237:
8238: =item *
8239:
8240: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
8241: unfakeable, receipt
8242:
8243: =item *
8244:
8245: receipt() : API to ireceipt working off of env values; given out to users
8246:
8247: =item *
8248:
8249: countacc($url) : count the number of accesses to a given URL
8250:
8251: =item *
8252:
8253: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
8254:
8255: =item *
8256:
8257: checkin($token) : updates that a resource has beeen returned (a hard copy version for instance) and returns the data that $token was Checkout with ($symb, $tuname, $tudom, and $tcrsid)
8258:
8259: =item *
8260:
8261: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
8262:
8263: =item *
8264:
8265: devalidate($symb) : devalidate temporary spreadsheet calculations,
8266: forcing spreadsheet to reevaluate the resource scores next time.
8267:
8268: =back
8269:
8270: =head2 Storing/Retreiving Data
8271:
8272: =over 4
8273:
8274: =item *
8275:
8276: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
8277: for this url; hashref needs to be given and should be a \%hashname; the
8278: remaining args aren't required and if they aren't passed or are '' they will
8279: be derived from the env
8280:
8281: =item *
8282:
8283: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
8284: uses critical subroutine
8285:
8286: =item *
8287:
8288: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
8289: all args are optional
8290:
8291: =item *
8292:
8293: dumpstore($namespace,$udom,$uname,$regexp,$range) :
8294: dumps the complete (or key matching regexp) namespace into a hash
8295: ($udom, $uname, $regexp, $range are optional) for a namespace that is
8296: normally &store()ed into
8297:
8298: $range should be either an integer '100' (give me the first 100
8299: matching records)
8300: or be two integers sperated by a - with no spaces
8301: '30-50' (give me the 30th through the 50th matching
8302: records)
8303:
8304:
8305: =item *
8306:
8307: putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
8308: replaces a &store() version of data with a replacement set of data
8309: for a particular resource in a namespace passed in the $storehash hash
8310: reference
8311:
8312: =item *
8313:
8314: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
8315: works very similar to store/cstore, but all data is stored in a
8316: temporary location and can be reset using tmpreset, $storehash should
8317: be a hash reference, returns nothing on success
8318:
8319: =item *
8320:
8321: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
8322: similar to restore, but all data is stored in a temporary location and
8323: can be reset using tmpreset. Returns a hash of values on success,
8324: error string otherwise.
8325:
8326: =item *
8327:
8328: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
8329: deltes all keys for $symb form the temporary storage hash.
8330:
8331: =item *
8332:
8333: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
8334: reference filled in from namesp ($udom and $uname are optional)
8335:
8336: =item *
8337:
8338: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
8339: namesp ($udom and $uname are optional)
8340:
8341: =item *
8342:
8343: dump($namespace,$udom,$uname,$regexp,$range) :
8344: dumps the complete (or key matching regexp) namespace into a hash
8345: ($udom, $uname, $regexp, $range are optional)
8346:
8347: $range should be either an integer '100' (give me the first 100
8348: matching records)
8349: or be two integers sperated by a - with no spaces
8350: '30-50' (give me the 30th through the 50th matching
8351: records)
8352: =item *
8353:
8354: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
8355: $store can be a scalar, an array reference, or if the amount to be
8356: incremented is > 1, a hash reference.
8357:
8358: ($udom and $uname are optional)
8359:
8360: =item *
8361:
8362: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
8363: ($udom and $uname are optional)
8364:
8365: =item *
8366:
8367: cput($namespace,$storehash,$udom,$uname) : critical put
8368: ($udom and $uname are optional)
8369:
8370: =item *
8371:
8372: newput($namespace,$storehash,$udom,$uname) :
8373:
8374: Attempts to store the items in the $storehash, but only if they don't
8375: currently exist, if this succeeds you can be certain that you have
8376: successfully created a new key value pair in the $namespace db.
8377:
8378:
8379: Args:
8380: $namespace: name of database to store values to
8381: $storehash: hashref to store to the db
8382: $udom: (optional) domain of user containing the db
8383: $uname: (optional) name of user caontaining the db
8384:
8385: Returns:
8386: 'ok' -> succeeded in storing all keys of $storehash
8387: 'key_exists: <key>' -> failed to anything out of $storehash, as at
8388: least <key> already existed in the db (other
8389: requested keys may also already exist)
8390: 'error: <msg>' -> unable to tie the DB or other erorr occured
8391: 'con_lost' -> unable to contact request server
8392: 'refused' -> action was not allowed by remote machine
8393:
8394:
8395: =item *
8396:
8397: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
8398: reference filled in from namesp (encrypts the return communication)
8399: ($udom and $uname are optional)
8400:
8401: =item *
8402:
8403: log($udom,$name,$home,$message) : write to permanent log for user; use
8404: critical subroutine
8405:
8406: =item *
8407:
8408: get_dom($namespace,$storearr,$udomain) : returns hash with keys from array
8409: reference filled in from namespace found in domain level on primary domain server ($udomain is optional)
8410:
8411: =item *
8412:
8413: put_dom($namespace,$storehash,$udomain) : stores hash in namespace at domain level on primary domain server ($udomain is optional)
8414:
8415: =back
8416:
8417: =head2 Network Status Functions
8418:
8419: =over 4
8420:
8421: =item *
8422:
8423: dirlist($uri) : return directory list based on URI
8424:
8425: =item *
8426:
8427: spareserver() : find server with least workload from spare.tab
8428:
8429: =back
8430:
8431: =head2 Apache Request
8432:
8433: =over 4
8434:
8435: =item *
8436:
8437: ssi($url,%hash) : server side include, does a complete request cycle on url to
8438: localhost, posts hash
8439:
8440: =back
8441:
8442: =head2 Data to String to Data
8443:
8444: =over 4
8445:
8446: =item *
8447:
8448: hash2str(%hash) : convert a hash into a string complete with escaping and '='
8449: and '&' separators, supports elements that are arrayrefs and hashrefs
8450:
8451: =item *
8452:
8453: hashref2str($hashref) : convert a hashref into a string complete with
8454: escaping and '=' and '&' separators, supports elements that are
8455: arrayrefs and hashrefs
8456:
8457: =item *
8458:
8459: arrayref2str($arrayref) : convert an arrayref into a string complete
8460: with escaping and '&' separators, supports elements that are arrayrefs
8461: and hashrefs
8462:
8463: =item *
8464:
8465: str2hash($string) : convert string to hash using unescaping and
8466: splitting on '=' and '&', supports elements that are arrayrefs and
8467: hashrefs
8468:
8469: =item *
8470:
8471: str2array($string) : convert string to hash using unescaping and
8472: splitting on '&', supports elements that are arrayrefs and hashrefs
8473:
8474: =back
8475:
8476: =head2 Logging Routines
8477:
8478: =over 4
8479:
8480: These routines allow one to make log messages in the lonnet.log and
8481: lonnet.perm logfiles.
8482:
8483: =item *
8484:
8485: logtouch() : make sure the logfile, lonnet.log, exists
8486:
8487: =item *
8488:
8489: logthis() : append message to the normal lonnet.log file, it gets
8490: preiodically rolled over and deleted.
8491:
8492: =item *
8493:
8494: logperm() : append a permanent message to lonnet.perm.log, this log
8495: file never gets deleted by any automated portion of the system, only
8496: messages of critical importance should go in here.
8497:
8498: =back
8499:
8500: =head2 General File Helper Routines
8501:
8502: =over 4
8503:
8504: =item *
8505:
8506: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
8507: (a) files in /uploaded
8508: (i) If a local copy of the file exists -
8509: compares modification date of local copy with last-modified date for
8510: definitive version stored on home server for course. If local copy is
8511: stale, requests a new version from the home server and stores it.
8512: If the original has been removed from the home server, then local copy
8513: is unlinked.
8514: (ii) If local copy does not exist -
8515: requests the file from the home server and stores it.
8516:
8517: If $caller is 'uploadrep':
8518: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
8519: for request for files originally uploaded via DOCS.
8520: - returns 'ok' if fresh local copy now available, -1 otherwise.
8521:
8522: Otherwise:
8523: This indicates a call from the content generation phase of the request.
8524: - returns the entire contents of the file or -1.
8525:
8526: (b) files in /res
8527: - returns the entire contents of a file or -1;
8528: it properly subscribes to and replicates the file if neccessary.
8529:
8530:
8531: =item *
8532:
8533: stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
8534: reference
8535:
8536: returns either a stat() list of data about the file or an empty list
8537: if the file doesn't exist or couldn't find out about it (connection
8538: problems or user unknown)
8539:
8540: =item *
8541:
8542: filelocation($dir,$file) : returns file system location of a file
8543: based on URI; meant to be "fairly clean" absolute reference, $dir is a
8544: directory that relative $file lookups are to looked in ($dir of /a/dir
8545: and a file of ../bob will become /a/bob)
8546:
8547: =item *
8548:
8549: hreflocation($dir,$file) : returns file system location or a URL; same as
8550: filelocation except for hrefs
8551:
8552: =item *
8553:
8554: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
8555:
8556: =back
8557:
8558: =head2 Usererfile file routines (/uploaded*)
8559:
8560: =over 4
8561:
8562: =item *
8563:
8564: userfileupload(): main rotine for putting a file in a user or course's
8565: filespace, arguments are,
8566:
8567: formname - required - this is the name of the element in $env where the
8568: filename, and the contents of the file to create/modifed exist
8569: the filename is in $env{'form.'.$formname.'.filename'} and the
8570: contents of the file is located in $env{'form.'.$formname}
8571: coursedoc - if true, store the file in the course of the active role
8572: of the current user
8573: subdir - required - subdirectory to put the file in under ../userfiles/
8574: if undefined, it will be placed in "unknown"
8575:
8576: (This routine calls clean_filename() to remove any dangerous
8577: characters from the filename, and then calls finuserfileupload() to
8578: complete the transaction)
8579:
8580: returns either the url of the uploaded file (/uploaded/....) if successful
8581: and /adm/notfound.html if unsuccessful
8582:
8583: =item *
8584:
8585: clean_filename(): routine for cleaing a filename up for storage in
8586: userfile space, argument is:
8587:
8588: filename - proposed filename
8589:
8590: returns: the new clean filename
8591:
8592: =item *
8593:
8594: finishuserfileupload(): routine that creaes and sends the file to
8595: userspace, probably shouldn't be called directly
8596:
8597: docuname: username or courseid of destination for the file
8598: docudom: domain of user/course of destination for the file
8599: formname: same as for userfileupload()
8600: fname: filename (inculding subdirectories) for the file
8601:
8602: returns either the url of the uploaded file (/uploaded/....) if successful
8603: and /adm/notfound.html if unsuccessful
8604:
8605: =item *
8606:
8607: renameuserfile(): renames an existing userfile to a new name
8608:
8609: Args:
8610: docuname: username or courseid of destination for the file
8611: docudom: domain of user/course of destination for the file
8612: old: current file name (including any subdirs under userfiles)
8613: new: desired file name (including any subdirs under userfiles)
8614:
8615: =item *
8616:
8617: mkdiruserfile(): creates a directory is a userfiles dir
8618:
8619: Args:
8620: docuname: username or courseid of destination for the file
8621: docudom: domain of user/course of destination for the file
8622: dir: dir to create (including any subdirs under userfiles)
8623:
8624: =item *
8625:
8626: removeuserfile(): removes a file that exists in userfiles
8627:
8628: Args:
8629: docuname: username or courseid of destination for the file
8630: docudom: domain of user/course of destination for the file
8631: fname: filname to delete (including any subdirs under userfiles)
8632:
8633: =item *
8634:
8635: removeuploadedurl(): convience function for removeuserfile()
8636:
8637: Args:
8638: url: a full /uploaded/... url to delete
8639:
8640: =item *
8641:
8642: get_portfile_permissions():
8643: Args:
8644: domain: domain of user or course contain the portfolio files
8645: user: name of user or num of course contain the portfolio files
8646: Returns:
8647: hashref of a dump of the proper file_permissions.db
8648:
8649:
8650: =item *
8651:
8652: get_access_controls():
8653:
8654: Args:
8655: current_permissions: the hash ref returned from get_portfile_permissions()
8656: group: (optional) the group you want the files associated with
8657: file: (optional) the file you want access info on
8658:
8659: Returns:
8660: a hash (keys are file names) of hashes containing
8661: keys are: path to file/file_name\0uniqueID:scope_end_start (see below)
8662: values are XML containing access control settings (see below)
8663:
8664: Internal notes:
8665:
8666: access controls are stored in file_permissions.db as key=value pairs.
8667: key -> path to file/file_name\0uniqueID:scope_end_start
8668: where scope -> public,guest,course,group,domains or users.
8669: end -> UNIX time for end of access (0 -> no end date)
8670: start -> UNIX time for start of access
8671:
8672: value -> XML description of access control
8673: <scope type=""> (type =1 of: public,guest,course,group,domains,users">
8674: <start></start>
8675: <end></end>
8676:
8677: <password></password> for scope type = guest
8678:
8679: <domain></domain> for scope type = course or group
8680: <number></number>
8681: <roles id="">
8682: <role></role>
8683: <access></access>
8684: <section></section>
8685: <group></group>
8686: </roles>
8687:
8688: <dom></dom> for scope type = domains
8689:
8690: <users> for scope type = users
8691: <user>
8692: <uname></uname>
8693: <udom></udom>
8694: </user>
8695: </users>
8696: </scope>
8697:
8698: Access data is also aggregated for each file in an additional key=value pair:
8699: key -> path to file/file_name\0accesscontrol
8700: value -> reference to hash
8701: hash contains key = value pairs
8702: where key = uniqueID:scope_end_start
8703: value = UNIX time record was last updated
8704:
8705: Used to improve speed of look-ups of access controls for each file.
8706:
8707: Locks on files (resulting from submission of portfolio file to a homework problem stored in array of arrays.
8708:
8709: modify_access_controls():
8710:
8711: Modifies access controls for a portfolio file
8712: Args
8713: 1. file name
8714: 2. reference to hash of required changes,
8715: 3. domain
8716: 4. username
8717: where domain,username are the domain of the portfolio owner
8718: (either a user or a course)
8719:
8720: Returns:
8721: 1. result of additions or updates ('ok' or 'error', with error message).
8722: 2. result of deletions ('ok' or 'error', with error message).
8723: 3. reference to hash of any new or updated access controls.
8724: 4. reference to hash used to map incoming IDs to uniqueIDs assigned to control.
8725: key = integer (inbound ID)
8726: value = uniqueID
8727:
8728: =back
8729:
8730: =head2 HTTP Helper Routines
8731:
8732: =over 4
8733:
8734: =item *
8735:
8736: escape() : unpack non-word characters into CGI-compatible hex codes
8737:
8738: =item *
8739:
8740: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
8741:
8742: =back
8743:
8744: =head1 PRIVATE SUBROUTINES
8745:
8746: =head2 Underlying communication routines (Shouldn't call)
8747:
8748: =over 4
8749:
8750: =item *
8751:
8752: subreply() : tries to pass a message to lonc, returns con_lost if incapable
8753:
8754: =item *
8755:
8756: reply() : uses subreply to send a message to remote machine, logs all failures
8757:
8758: =item *
8759:
8760: critical() : passes a critical message to another server; if cannot
8761: get through then place message in connection buffer directory and
8762: returns con_delayed, if incapable of saving message, returns
8763: con_failed
8764:
8765: =item *
8766:
8767: reconlonc() : tries to reconnect lonc client processes.
8768:
8769: =back
8770:
8771: =head2 Resource Access Logging
8772:
8773: =over 4
8774:
8775: =item *
8776:
8777: flushcourselogs() : flush (save) buffer logs and access logs
8778:
8779: =item *
8780:
8781: courselog($what) : save message for course in hash
8782:
8783: =item *
8784:
8785: courseacclog($what) : save message for course using &courselog(). Perform
8786: special processing for specific resource types (problems, exams, quizzes, etc).
8787:
8788: =item *
8789:
8790: goodbye() : flush course logs and log shutting down; it is called in srm.conf
8791: as a PerlChildExitHandler
8792:
8793: =back
8794:
8795: =head2 Other
8796:
8797: =over 4
8798:
8799: =item *
8800:
8801: symblist($mapname,%newhash) : update symbolic storage links
8802:
8803: =back
8804:
8805: =cut
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