1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.589 2005/01/18 22:09:14 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 %homecache %badServerCache %hostip %iphost %spareid %hostdom
39: %libserv %pr %prp %metacache %packagetab %titlecache %courseresversioncache %resversioncache
40: %courselogs %accesshash %userrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf %courseresdatacache
42: %userresdatacache %getsectioncache %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir $_64bit);
44:
45: use IO::Socket;
46: use GDBM_File;
47: use Apache::Constants qw(:common :http);
48: use HTML::LCParser;
49: use Fcntl qw(:flock);
50: use Apache::lonlocal;
51: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
52: use Time::HiRes qw( gettimeofday tv_interval );
53: my $readit;
54: my $max_connection_retries = 10; # Or some such value.
55:
56: =pod
57:
58: =head1 Package Variables
59:
60: These are largely undocumented, so if you decipher one please note it here.
61:
62: =over 4
63:
64: =item $processmarker
65:
66: Contains the time this process was started and this servers host id.
67:
68: =item $dumpcount
69:
70: Counts the number of times a message log flush has been attempted (regardless
71: of success) by this process. Used as part of the filename when messages are
72: delayed.
73:
74: =back
75:
76: =cut
77:
78:
79: # --------------------------------------------------------------------- Logging
80:
81: sub logtouch {
82: my $execdir=$perlvar{'lonDaemons'};
83: unless (-e "$execdir/logs/lonnet.log") {
84: open(my $fh,">>$execdir/logs/lonnet.log");
85: close $fh;
86: }
87: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
88: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
89: }
90:
91: sub logthis {
92: my $message=shift;
93: my $execdir=$perlvar{'lonDaemons'};
94: my $now=time;
95: my $local=localtime($now);
96: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
97: print $fh "$local ($$): $message\n";
98: close($fh);
99: }
100: return 1;
101: }
102:
103: sub logperm {
104: my $message=shift;
105: my $execdir=$perlvar{'lonDaemons'};
106: my $now=time;
107: my $local=localtime($now);
108: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
109: print $fh "$now:$message:$local\n";
110: close($fh);
111: }
112: return 1;
113: }
114:
115: # -------------------------------------------------- Non-critical communication
116: sub subreply {
117: my ($cmd,$server)=@_;
118: my $peerfile="$perlvar{'lonSockDir'}/$server";
119: #
120: # With loncnew process trimming, there's a timing hole between lonc server
121: # process exit and the master server picking up the listen on the AF_UNIX
122: # socket. In that time interval, a lock file will exist:
123:
124: my $lockfile=$peerfile.".lock";
125: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
126: sleep(1);
127: }
128: # At this point, either a loncnew parent is listening or an old lonc
129: # or loncnew child is listening so we can connect or everything's dead.
130: #
131: # We'll give the connection a few tries before abandoning it. If
132: # connection is not possible, we'll con_lost back to the client.
133: #
134: my $client;
135: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
136: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
137: Type => SOCK_STREAM,
138: Timeout => 10);
139: if($client) {
140: last; # Connected!
141: }
142: sleep(1); # Try again later if failed connection.
143: }
144: my $answer;
145: if ($client) {
146: print $client "$cmd\n";
147: $answer=<$client>;
148: if (!$answer) { $answer="con_lost"; }
149: chomp($answer);
150: } else {
151: $answer = 'con_lost'; # Failed connection.
152: }
153: return $answer;
154: }
155:
156: sub reply {
157: my ($cmd,$server)=@_;
158: unless (defined($hostname{$server})) { return 'no_such_host'; }
159: my $answer=subreply($cmd,$server);
160: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
161: &logthis("<font color=blue>WARNING:".
162: " $cmd to $server returned $answer</font>");
163: }
164: return $answer;
165: }
166:
167: # ----------------------------------------------------------- Send USR1 to lonc
168:
169: sub reconlonc {
170: my $peerfile=shift;
171: &logthis("Trying to reconnect for $peerfile");
172: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
173: if (open(my $fh,"<$loncfile")) {
174: my $loncpid=<$fh>;
175: chomp($loncpid);
176: if (kill 0 => $loncpid) {
177: &logthis("lonc at pid $loncpid responding, sending USR1");
178: kill USR1 => $loncpid;
179: sleep 1;
180: if (-e "$peerfile") { return; }
181: &logthis("$peerfile still not there, give it another try");
182: sleep 5;
183: if (-e "$peerfile") { return; }
184: &logthis(
185: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
186: } else {
187: &logthis(
188: "<font color=blue>WARNING:".
189: " lonc at pid $loncpid not responding, giving up</font>");
190: }
191: } else {
192: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
193: }
194: }
195:
196: # ------------------------------------------------------ Critical communication
197:
198: sub critical {
199: my ($cmd,$server)=@_;
200: unless ($hostname{$server}) {
201: &logthis("<font color=blue>WARNING:".
202: " Critical message to unknown server ($server)</font>");
203: return 'no_such_host';
204: }
205: my $answer=reply($cmd,$server);
206: if ($answer eq 'con_lost') {
207: &reconlonc("$perlvar{'lonSockDir'}/$server");
208: my $answer=reply($cmd,$server);
209: if ($answer eq 'con_lost') {
210: my $now=time;
211: my $middlename=$cmd;
212: $middlename=substr($middlename,0,16);
213: $middlename=~s/\W//g;
214: my $dfilename=
215: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
216: $dumpcount++;
217: {
218: my $dfh;
219: if (open($dfh,">$dfilename")) {
220: print $dfh "$cmd\n";
221: close($dfh);
222: }
223: }
224: sleep 2;
225: my $wcmd='';
226: {
227: my $dfh;
228: if (open($dfh,"<$dfilename")) {
229: $wcmd=<$dfh>;
230: close($dfh);
231: }
232: }
233: chomp($wcmd);
234: if ($wcmd eq $cmd) {
235: &logthis("<font color=blue>WARNING: ".
236: "Connection buffer $dfilename: $cmd</font>");
237: &logperm("D:$server:$cmd");
238: return 'con_delayed';
239: } else {
240: &logthis("<font color=red>CRITICAL:"
241: ." Critical connection failed: $server $cmd</font>");
242: &logperm("F:$server:$cmd");
243: return 'con_failed';
244: }
245: }
246: }
247: return $answer;
248: }
249:
250: #
251: # -------------- Remove all key from the env that start witha lowercase letter
252: # (Which is always a lon-capa value)
253:
254: sub cleanenv {
255: # unless (defined(&Apache::exists_config_define("MODPERL2"))) { return; }
256: # unless (&Apache::exists_config_define("MODPERL2")) { return; }
257: foreach my $key (keys(%ENV)) {
258: if ($key =~ /^[a-z]/) {
259: delete($ENV{$key});
260: }
261: }
262: }
263:
264: # ------------------------------------------- Transfer profile into environment
265:
266: sub transfer_profile_to_env {
267: my ($lonidsdir,$handle)=@_;
268: my @profile;
269: {
270: open(my $idf,"$lonidsdir/$handle.id");
271: flock($idf,LOCK_SH);
272: @profile=<$idf>;
273: close($idf);
274: }
275: my $envi;
276: my %Remove;
277: for ($envi=0;$envi<=$#profile;$envi++) {
278: chomp($profile[$envi]);
279: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
280: $ENV{$envname} = $envvalue;
281: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
282: if ($time < time-300) {
283: $Remove{$key}++;
284: }
285: }
286: }
287: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
288: foreach my $expired_key (keys(%Remove)) {
289: &delenv($expired_key);
290: }
291: }
292:
293: # ---------------------------------------------------------- Append Environment
294:
295: sub appenv {
296: my %newenv=@_;
297: foreach (keys %newenv) {
298: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
299: &logthis("<font color=blue>WARNING: ".
300: "Attempt to modify environment ".$_." to ".$newenv{$_}
301: .'</font>');
302: delete($newenv{$_});
303: } else {
304: $ENV{$_}=$newenv{$_};
305: }
306: }
307:
308: my $lockfh;
309: unless (open($lockfh,"$ENV{'user.environment'}")) {
310: return 'error: '.$!;
311: }
312: unless (flock($lockfh,LOCK_EX)) {
313: &logthis("<font color=blue>WARNING: ".
314: 'Could not obtain exclusive lock in appenv: '.$!);
315: close($lockfh);
316: return 'error: '.$!;
317: }
318:
319: my @oldenv;
320: {
321: my $fh;
322: unless (open($fh,"$ENV{'user.environment'}")) {
323: return 'error: '.$!;
324: }
325: @oldenv=<$fh>;
326: close($fh);
327: }
328: for (my $i=0; $i<=$#oldenv; $i++) {
329: chomp($oldenv[$i]);
330: if ($oldenv[$i] ne '') {
331: my ($name,$value)=split(/=/,$oldenv[$i]);
332: unless (defined($newenv{$name})) {
333: $newenv{$name}=$value;
334: }
335: }
336: }
337: {
338: my $fh;
339: unless (open($fh,">$ENV{'user.environment'}")) {
340: return 'error';
341: }
342: my $newname;
343: foreach $newname (keys %newenv) {
344: print $fh "$newname=$newenv{$newname}\n";
345: }
346: close($fh);
347: }
348:
349: close($lockfh);
350: return 'ok';
351: }
352: # ----------------------------------------------------- Delete from Environment
353:
354: sub delenv {
355: my $delthis=shift;
356: my %newenv=();
357: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
358: &logthis("<font color=blue>WARNING: ".
359: "Attempt to delete from environment ".$delthis);
360: return 'error';
361: }
362: my @oldenv;
363: {
364: my $fh;
365: unless (open($fh,"$ENV{'user.environment'}")) {
366: return 'error';
367: }
368: unless (flock($fh,LOCK_SH)) {
369: &logthis("<font color=blue>WARNING: ".
370: 'Could not obtain shared lock in delenv: '.$!);
371: close($fh);
372: return 'error: '.$!;
373: }
374: @oldenv=<$fh>;
375: close($fh);
376: }
377: {
378: my $fh;
379: unless (open($fh,">$ENV{'user.environment'}")) {
380: return 'error';
381: }
382: unless (flock($fh,LOCK_EX)) {
383: &logthis("<font color=blue>WARNING: ".
384: 'Could not obtain exclusive lock in delenv: '.$!);
385: close($fh);
386: return 'error: '.$!;
387: }
388: foreach (@oldenv) {
389: if ($_=~/^$delthis/) {
390: my ($key,undef) = split('=',$_);
391: delete($ENV{$key});
392: } else {
393: print $fh $_;
394: }
395: }
396: close($fh);
397: }
398: return 'ok';
399: }
400:
401: # ------------------------------------------ Find out current server userload
402: # there is a copy in lond
403: sub userload {
404: my $numusers=0;
405: {
406: opendir(LONIDS,$perlvar{'lonIDsDir'});
407: my $filename;
408: my $curtime=time;
409: while ($filename=readdir(LONIDS)) {
410: if ($filename eq '.' || $filename eq '..') {next;}
411: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
412: if ($curtime-$mtime < 1800) { $numusers++; }
413: }
414: closedir(LONIDS);
415: }
416: my $userloadpercent=0;
417: my $maxuserload=$perlvar{'lonUserLoadLim'};
418: if ($maxuserload) {
419: $userloadpercent=100*$numusers/$maxuserload;
420: }
421: $userloadpercent=sprintf("%.2f",$userloadpercent);
422: return $userloadpercent;
423: }
424:
425: # ------------------------------------------ Fight off request when overloaded
426:
427: sub overloaderror {
428: my ($r,$checkserver)=@_;
429: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
430: my $loadavg;
431: if ($checkserver eq $perlvar{'lonHostID'}) {
432: open(my $loadfile,'/proc/loadavg');
433: $loadavg=<$loadfile>;
434: $loadavg =~ s/\s.*//g;
435: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
436: close($loadfile);
437: } else {
438: $loadavg=&reply('load',$checkserver);
439: }
440: my $overload=$loadavg-100;
441: if ($overload>0) {
442: $r->err_headers_out->{'Retry-After'}=$overload;
443: $r->log_error('Overload of '.$overload.' on '.$checkserver);
444: return 413;
445: }
446: return '';
447: }
448:
449: # ------------------------------ Find server with least workload from spare.tab
450:
451: sub spareserver {
452: my ($loadpercent,$userloadpercent) = @_;
453: my $tryserver;
454: my $spareserver='';
455: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
456: my $lowestserver=$loadpercent > $userloadpercent?
457: $loadpercent : $userloadpercent;
458: foreach $tryserver (keys %spareid) {
459: my $loadans=reply('load',$tryserver);
460: my $userloadans=reply('userload',$tryserver);
461: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
462: next; #didn't get a number from the server
463: }
464: my $answer;
465: if ($loadans =~ /\d/) {
466: if ($userloadans =~ /\d/) {
467: #both are numbers, pick the bigger one
468: $answer=$loadans > $userloadans?
469: $loadans : $userloadans;
470: } else {
471: $answer = $loadans;
472: }
473: } else {
474: $answer = $userloadans;
475: }
476: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
477: $spareserver="http://$hostname{$tryserver}";
478: $lowestserver=$answer;
479: }
480: }
481: return $spareserver;
482: }
483:
484: # --------------------------------------------- Try to change a user's password
485:
486: sub changepass {
487: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
488: $currentpass = &escape($currentpass);
489: $newpass = &escape($newpass);
490: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
491: $server);
492: if (! $answer) {
493: &logthis("No reply on password change request to $server ".
494: "by $uname in domain $udom.");
495: } elsif ($answer =~ "^ok") {
496: &logthis("$uname in $udom successfully changed their password ".
497: "on $server.");
498: } elsif ($answer =~ "^pwchange_failure") {
499: &logthis("$uname in $udom was unable to change their password ".
500: "on $server. The action was blocked by either lcpasswd ".
501: "or pwchange");
502: } elsif ($answer =~ "^non_authorized") {
503: &logthis("$uname in $udom did not get their password correct when ".
504: "attempting to change it on $server.");
505: } elsif ($answer =~ "^auth_mode_error") {
506: &logthis("$uname in $udom attempted to change their password despite ".
507: "not being locally or internally authenticated on $server.");
508: } elsif ($answer =~ "^unknown_user") {
509: &logthis("$uname in $udom attempted to change their password ".
510: "on $server but were unable to because $server is not ".
511: "their home server.");
512: } elsif ($answer =~ "^refused") {
513: &logthis("$server refused to change $uname in $udom password because ".
514: "it was sent an unencrypted request to change the password.");
515: }
516: return $answer;
517: }
518:
519: # ----------------------- Try to determine user's current authentication scheme
520:
521: sub queryauthenticate {
522: my ($uname,$udom)=@_;
523: my $uhome=&homeserver($uname,$udom);
524: if (!$uhome) {
525: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
526: return 'no_host';
527: }
528: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
529: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
530: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
531: }
532: return $answer;
533: }
534:
535: # --------- Try to authenticate user from domain's lib servers (first this one)
536:
537: sub authenticate {
538: my ($uname,$upass,$udom)=@_;
539: $upass=escape($upass);
540: $uname=~s/\W//g;
541: my $uhome=&homeserver($uname,$udom);
542: if (!$uhome) {
543: &logthis("User $uname at $udom is unknown in authenticate");
544: return 'no_host';
545: }
546: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
547: if ($answer eq 'authorized') {
548: &logthis("User $uname at $udom authorized by $uhome");
549: return $uhome;
550: }
551: if ($answer eq 'non_authorized') {
552: &logthis("User $uname at $udom rejected by $uhome");
553: return 'no_host';
554: }
555: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
556: return 'no_host';
557: }
558:
559: # ---------------------- Find the homebase for a user from domain's lib servers
560:
561: sub homeserver {
562: my ($uname,$udom,$ignoreBadCache)=@_;
563: my $index="$uname:$udom";
564:
565: my ($result,$cached)=&is_cached(\%homecache,$index,'home',86400);
566: if (defined($cached)) { return $result; }
567: my $tryserver;
568: foreach $tryserver (keys %libserv) {
569: next if ($ignoreBadCache ne 'true' &&
570: exists($badServerCache{$tryserver}));
571: if ($hostdom{$tryserver} eq $udom) {
572: my $answer=reply("home:$udom:$uname",$tryserver);
573: if ($answer eq 'found') {
574: return &do_cache(\%homecache,$index,$tryserver,'home');
575: } elsif ($answer eq 'no_host') {
576: $badServerCache{$tryserver}=1;
577: }
578: }
579: }
580: return 'no_host';
581: }
582:
583: # ------------------------------------- Find the usernames behind a list of IDs
584:
585: sub idget {
586: my ($udom,@ids)=@_;
587: my %returnhash=();
588:
589: my $tryserver;
590: foreach $tryserver (keys %libserv) {
591: if ($hostdom{$tryserver} eq $udom) {
592: my $idlist=join('&',@ids);
593: $idlist=~tr/A-Z/a-z/;
594: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
595: my @answer=();
596: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
597: @answer=split(/\&/,$reply);
598: } ;
599: my $i;
600: for ($i=0;$i<=$#ids;$i++) {
601: if ($answer[$i]) {
602: $returnhash{$ids[$i]}=$answer[$i];
603: }
604: }
605: }
606: }
607: return %returnhash;
608: }
609:
610: # ------------------------------------- Find the IDs behind a list of usernames
611:
612: sub idrget {
613: my ($udom,@unames)=@_;
614: my %returnhash=();
615: foreach (@unames) {
616: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
617: }
618: return %returnhash;
619: }
620:
621: # ------------------------------- Store away a list of names and associated IDs
622:
623: sub idput {
624: my ($udom,%ids)=@_;
625: my %servers=();
626: foreach (keys %ids) {
627: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
628: my $uhom=&homeserver($_,$udom);
629: if ($uhom ne 'no_host') {
630: my $id=&escape($ids{$_});
631: $id=~tr/A-Z/a-z/;
632: my $unam=&escape($_);
633: if ($servers{$uhom}) {
634: $servers{$uhom}.='&'.$id.'='.$unam;
635: } else {
636: $servers{$uhom}=$id.'='.$unam;
637: }
638: }
639: }
640: foreach (keys %servers) {
641: &critical('idput:'.$udom.':'.$servers{$_},$_);
642: }
643: }
644:
645: # --------------------------------------------------- Assign a key to a student
646:
647: sub assign_access_key {
648: #
649: # a valid key looks like uname:udom#comments
650: # comments are being appended
651: #
652: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
653: $kdom=
654: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($kdom));
655: $knum=
656: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($knum));
657: $cdom=
658: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
659: $cnum=
660: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
661: $udom=$ENV{'user.name'} unless (defined($udom));
662: $uname=$ENV{'user.domain'} unless (defined($uname));
663: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
664: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
665: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
666: # assigned to this person
667: # - this should not happen,
668: # unless something went wrong
669: # the first time around
670: # ready to assign
671: $logentry=$1.'; '.$logentry;
672: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
673: $kdom,$knum) eq 'ok') {
674: # key now belongs to user
675: my $envkey='key.'.$cdom.'_'.$cnum;
676: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
677: &appenv('environment.'.$envkey => $ckey);
678: return 'ok';
679: } else {
680: return
681: 'error: Count not permanently assign key, will need to be re-entered later.';
682: }
683: } else {
684: return 'error: Could not assign key, try again later.';
685: }
686: } elsif (!$existing{$ckey}) {
687: # the key does not exist
688: return 'error: The key does not exist';
689: } else {
690: # the key is somebody else's
691: return 'error: The key is already in use';
692: }
693: }
694:
695: # ------------------------------------------ put an additional comment on a key
696:
697: sub comment_access_key {
698: #
699: # a valid key looks like uname:udom#comments
700: # comments are being appended
701: #
702: my ($ckey,$cdom,$cnum,$logentry)=@_;
703: $cdom=
704: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
705: $cnum=
706: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
707: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
708: if ($existing{$ckey}) {
709: $existing{$ckey}.='; '.$logentry;
710: # ready to assign
711: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
712: $cdom,$cnum) eq 'ok') {
713: return 'ok';
714: } else {
715: return 'error: Count not store comment.';
716: }
717: } else {
718: # the key does not exist
719: return 'error: The key does not exist';
720: }
721: }
722:
723: # ------------------------------------------------------ Generate a set of keys
724:
725: sub generate_access_keys {
726: my ($number,$cdom,$cnum,$logentry)=@_;
727: $cdom=
728: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
729: $cnum=
730: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
731: unless (&allowed('mky',$cdom)) { return 0; }
732: unless (($cdom) && ($cnum)) { return 0; }
733: if ($number>10000) { return 0; }
734: sleep(2); # make sure don't get same seed twice
735: srand(time()^($$+($$<<15))); # from "Programming Perl"
736: my $total=0;
737: for (my $i=1;$i<=$number;$i++) {
738: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
739: sprintf("%lx",int(100000*rand)).'-'.
740: sprintf("%lx",int(100000*rand));
741: $newkey=~s/1/g/g; # folks mix up 1 and l
742: $newkey=~s/0/h/g; # and also 0 and O
743: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
744: if ($existing{$newkey}) {
745: $i--;
746: } else {
747: if (&put('accesskeys',
748: { $newkey => '# generated '.localtime().
749: ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
750: '; '.$logentry },
751: $cdom,$cnum) eq 'ok') {
752: $total++;
753: }
754: }
755: }
756: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
757: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
758: return $total;
759: }
760:
761: # ------------------------------------------------------- Validate an accesskey
762:
763: sub validate_access_key {
764: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
765: $cdom=
766: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
767: $cnum=
768: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
769: $udom=$ENV{'user.domain'} unless (defined($udom));
770: $uname=$ENV{'user.name'} unless (defined($uname));
771: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
772: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
773: }
774:
775: # ------------------------------------- Find the section of student in a course
776:
777: sub getsection {
778: my ($udom,$unam,$courseid)=@_;
779: $courseid=~s/\_/\//g;
780: $courseid=~s/^(\w)/\/$1/;
781:
782: my $hashid="$udom:$unam:$courseid";
783: my ($result,$cached)=&is_cached(\%getsectioncache,$hashid,'getsection');
784: if (defined($cached)) { return $result; }
785:
786: my %Pending;
787: my %Expired;
788: #
789: # Each role can either have not started yet (pending), be active,
790: # or have expired.
791: #
792: # If there is an active role, we are done.
793: #
794: # If there is more than one role which has not started yet,
795: # choose the one which will start sooner
796: # If there is one role which has not started yet, return it.
797: #
798: # If there is more than one expired role, choose the one which ended last.
799: # If there is a role which has expired, return it.
800: #
801: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
802: &homeserver($unam,$udom)))) {
803: my ($key,$value)=split(/\=/,$_);
804: $key=&unescape($key);
805: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
806: my $section=$1;
807: if ($key eq $courseid.'_st') { $section=''; }
808: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
809: my $now=time;
810: if (defined($end) && $end && ($now > $end)) {
811: $Expired{$end}=$section;
812: next;
813: }
814: if (defined($start) && $start && ($now < $start)) {
815: $Pending{$start}=$section;
816: next;
817: }
818: return &do_cache(\%getsectioncache,$hashid,$section,'getsection');
819: }
820: #
821: # Presumedly there will be few matching roles from the above
822: # loop and the sorting time will be negligible.
823: if (scalar(keys(%Pending))) {
824: my ($time) = sort {$a <=> $b} keys(%Pending);
825: return &do_cache(\%getsectioncache,$hashid,$Pending{$time},'getsection');
826: }
827: if (scalar(keys(%Expired))) {
828: my @sorted = sort {$a <=> $b} keys(%Expired);
829: my $time = pop(@sorted);
830: return &do_cache(\%getsectioncache,$hashid,$Expired{$time},'getsection');
831: }
832: return &do_cache(\%getsectioncache,$hashid,'-1','getsection');
833: }
834:
835:
836: my $disk_caching_disabled=1;
837:
838: sub devalidate_cache {
839: my ($cache,$id,$name) = @_;
840: delete $$cache{$id.'.time'};
841: delete $$cache{$id.'.file'};
842: delete $$cache{$id};
843: if (1 || $disk_caching_disabled) { return; }
844: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
845: if (!-e $filename) { return; }
846: open(DB,">$filename.lock");
847: flock(DB,LOCK_EX);
848: my %hash;
849: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
850: eval <<'EVALBLOCK';
851: delete($hash{$id});
852: delete($hash{$id.'.time'});
853: EVALBLOCK
854: if ($@) {
855: &logthis("<font color='red'>devalidate_cache blew up :$@:$name</font>");
856: unlink($filename);
857: }
858: } else {
859: if (-e $filename) {
860: &logthis("Unable to tie hash (devalidate cache): $name");
861: unlink($filename);
862: }
863: }
864: untie(%hash);
865: flock(DB,LOCK_UN);
866: close(DB);
867: }
868:
869: sub is_cached {
870: my ($cache,$id,$name,$time) = @_;
871: if (!$time) { $time=300; }
872: if (!exists($$cache{$id.'.time'})) {
873: &load_cache_item($cache,$name,$id,$time);
874: }
875: if (!exists($$cache{$id.'.time'})) {
876: # &logthis("Didn't find $id");
877: return (undef,undef);
878: } else {
879: if (time-($$cache{$id.'.time'})>$time) {
880: if (exists($$cache{$id.'.file'})) {
881: foreach my $filename (@{ $$cache{$id.'.file'} }) {
882: my $mtime=(stat($filename))[9];
883: #+1 is to take care of edge effects
884: if ($mtime && (($mtime+1) < ($$cache{$id.'.time'}))) {
885: # &logthis("Upping $mtime - ".$$cache{$id.'.time'}.
886: # "$id because of $filename");
887: } else {
888: &logthis("Devalidating $filename $id - ".(time-($$cache{$id.'.time'})));
889: &devalidate_cache($cache,$id,$name);
890: return (undef,undef);
891: }
892: }
893: $$cache{$id.'.time'}=time;
894: } else {
895: # &logthis("Devalidating $id - ".time-($$cache{$id.'.time'}));
896: &devalidate_cache($cache,$id,$name);
897: return (undef,undef);
898: }
899: }
900: }
901: return ($$cache{$id},1);
902: }
903:
904: sub do_cache {
905: my ($cache,$id,$value,$name) = @_;
906: $$cache{$id.'.time'}=time;
907: $$cache{$id}=$value;
908: # &logthis("Caching $id as :$value:");
909: &save_cache_item($cache,$name,$id);
910: # do_cache implictly return the set value
911: $$cache{$id};
912: }
913:
914: my %do_save_item;
915: my %do_save;
916: sub save_cache_item {
917: my ($cache,$name,$id)=@_;
918: if ($disk_caching_disabled) { return; }
919: $do_save{$name}=$cache;
920: if (!exists($do_save_item{$name})) { $do_save_item{$name}={} }
921: $do_save_item{$name}->{$id}=1;
922: return;
923: }
924:
925: sub save_cache {
926: if ($disk_caching_disabled) { return; }
927: my ($cache,$name,$id);
928: foreach $name (keys(%do_save)) {
929: $cache=$do_save{$name};
930:
931: my $starttime=&Time::HiRes::time();
932: &logthis("Saving :$name:");
933: my %hash;
934: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
935: open(DB,">$filename.lock");
936: flock(DB,LOCK_EX);
937: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
938: foreach $id (keys(%{ $do_save_item{$name} })) {
939: eval <<'EVALBLOCK';
940: $hash{$id.'.time'}=$$cache{$id.'.time'};
941: $hash{$id}=freeze({'item'=>$$cache{$id}});
942: if (exists($$cache{$id.'.file'})) {
943: $hash{$id.'.file'}=freeze({'item'=>$$cache{$id.'.file'}});
944: }
945: EVALBLOCK
946: if ($@) {
947: &logthis("<font color='red'>save_cache blew up :$@:$name</font>");
948: unlink($filename);
949: last;
950: }
951: }
952: } else {
953: if (-e $filename) {
954: &logthis("Unable to tie hash (save cache): $name ($!)");
955: unlink($filename);
956: }
957: }
958: untie(%hash);
959: flock(DB,LOCK_UN);
960: close(DB);
961: &logthis("save_cache $name took ".(&Time::HiRes::time()-$starttime));
962: }
963: undef(%do_save);
964: undef(%do_save_item);
965:
966: }
967:
968: sub load_cache_item {
969: my ($cache,$name,$id,$time)=@_;
970: if ($disk_caching_disabled) { return; }
971: my $starttime=&Time::HiRes::time();
972: # &logthis("Before Loading $name for $id size is ".scalar(%$cache));
973: my %hash;
974: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
975: if (!-e $filename) { return; }
976: open(DB,">$filename.lock");
977: flock(DB,LOCK_SH);
978: if (tie(%hash,'GDBM_File',$filename,&GDBM_READER(),0640)) {
979: eval <<'EVALBLOCK';
980: if (!%$cache) {
981: my $count;
982: while (my ($key,$value)=each(%hash)) {
983: $count++;
984: if ($key =~ /\.time$/) {
985: $$cache{$key}=$value;
986: } else {
987: my $hashref=thaw($value);
988: $$cache{$key}=$hashref->{'item'};
989: }
990: }
991: # &logthis("Initial load: $count");
992: } else {
993: if (($$cache{$id.'.time'}+$time) < time) {
994: $$cache{$id.'.time'}=$hash{$id.'.time'};
995: {
996: my $hashref=thaw($hash{$id});
997: $$cache{$id}=$hashref->{'item'};
998: }
999: if (exists($hash{$id.'.file'})) {
1000: my $hashref=thaw($hash{$id.'.file'});
1001: $$cache{$id.'.file'}=$hashref->{'item'};
1002: }
1003: }
1004: }
1005: EVALBLOCK
1006: if ($@) {
1007: &logthis("<font color='red'>load_cache blew up :$@:$name</font>");
1008: unlink($filename);
1009: }
1010: } else {
1011: if (-e $filename) {
1012: &logthis("Unable to tie hash (load cache item): $name ($!)");
1013: unlink($filename);
1014: }
1015: }
1016: untie(%hash);
1017: flock(DB,LOCK_UN);
1018: close(DB);
1019: # &logthis("After Loading $name size is ".scalar(%$cache));
1020: # &logthis("load_cache_item $name took ".(&Time::HiRes::time()-$starttime));
1021: }
1022:
1023: # ------------------------------------- Read an entry from a user's environment
1024:
1025: sub userenvironment {
1026: my ($udom,$unam,@what)=@_;
1027: my %returnhash=();
1028: my @answer=split(/\&/,
1029: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1030: &homeserver($unam,$udom)));
1031: my $i;
1032: for ($i=0;$i<=$#what;$i++) {
1033: $returnhash{$what[$i]}=&unescape($answer[$i]);
1034: }
1035: return %returnhash;
1036: }
1037:
1038: # -------------------------------------------------------------------- New chat
1039:
1040: sub chatsend {
1041: my ($newentry,$anon)=@_;
1042: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1043: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1044: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1045: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1046: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
1047: &escape($newentry)),$chome);
1048: }
1049:
1050: # ------------------------------------------ Find current version of a resource
1051:
1052: sub getversion {
1053: my $fname=&clutter(shift);
1054: unless ($fname=~/^\/res\//) { return -1; }
1055: return ¤tversion(&filelocation('',$fname));
1056: }
1057:
1058: sub currentversion {
1059: my $fname=shift;
1060: my ($result,$cached)=&is_cached(\%resversioncache,$fname,'resversion',600);
1061: if (defined($cached)) { return $result; }
1062: my $author=$fname;
1063: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1064: my ($udom,$uname)=split(/\//,$author);
1065: my $home=homeserver($uname,$udom);
1066: if ($home eq 'no_host') {
1067: return -1;
1068: }
1069: my $answer=reply("currentversion:$fname",$home);
1070: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1071: return -1;
1072: }
1073: return &do_cache(\%resversioncache,$fname,$answer,'resversion');
1074: }
1075:
1076: # ----------------------------- Subscribe to a resource, return URL if possible
1077:
1078: sub subscribe {
1079: my $fname=shift;
1080: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1081: $fname=~s/[\n\r]//g;
1082: my $author=$fname;
1083: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1084: my ($udom,$uname)=split(/\//,$author);
1085: my $home=homeserver($uname,$udom);
1086: if ($home eq 'no_host') {
1087: return 'not_found';
1088: }
1089: my $answer=reply("sub:$fname",$home);
1090: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1091: $answer.=' by '.$home;
1092: }
1093: return $answer;
1094: }
1095:
1096: # -------------------------------------------------------------- Replicate file
1097:
1098: sub repcopy {
1099: my $filename=shift;
1100: $filename=~s/\/+/\//g;
1101: if ($filename=~m|^/home/httpd/html/adm/|) { return OK; }
1102: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return OK; }
1103: if ($filename=~m|^/home/httpd/html/userfiles/| or
1104: $filename=~m|^/*uploaded/|) {
1105: return &repcopy_userfile($filename);
1106: }
1107: $filename=~s/[\n\r]//g;
1108: my $transname="$filename.in.transfer";
1109: if ((-e $filename) || (-e $transname)) { return OK; }
1110: my $remoteurl=subscribe($filename);
1111: if ($remoteurl =~ /^con_lost by/) {
1112: &logthis("Subscribe returned $remoteurl: $filename");
1113: return HTTP_SERVICE_UNAVAILABLE;
1114: } elsif ($remoteurl eq 'not_found') {
1115: #&logthis("Subscribe returned not_found: $filename");
1116: return HTTP_NOT_FOUND;
1117: } elsif ($remoteurl =~ /^rejected by/) {
1118: &logthis("Subscribe returned $remoteurl: $filename");
1119: return FORBIDDEN;
1120: } elsif ($remoteurl eq 'directory') {
1121: return OK;
1122: } else {
1123: my $author=$filename;
1124: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1125: my ($udom,$uname)=split(/\//,$author);
1126: my $home=homeserver($uname,$udom);
1127: unless ($home eq $perlvar{'lonHostID'}) {
1128: my @parts=split(/\//,$filename);
1129: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1130: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1131: &logthis("Malconfiguration for replication: $filename");
1132: return HTTP_BAD_REQUEST;
1133: }
1134: my $count;
1135: for ($count=5;$count<$#parts;$count++) {
1136: $path.="/$parts[$count]";
1137: if ((-e $path)!=1) {
1138: mkdir($path,0777);
1139: }
1140: }
1141: my $ua=new LWP::UserAgent;
1142: my $request=new HTTP::Request('GET',"$remoteurl");
1143: my $response=$ua->request($request,$transname);
1144: if ($response->is_error()) {
1145: unlink($transname);
1146: my $message=$response->status_line;
1147: &logthis("<font color=blue>WARNING:"
1148: ." LWP get: $message: $filename</font>");
1149: return HTTP_SERVICE_UNAVAILABLE;
1150: } else {
1151: if ($remoteurl!~/\.meta$/) {
1152: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1153: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1154: if ($mresponse->is_error()) {
1155: unlink($filename.'.meta');
1156: &logthis(
1157: "<font color=yellow>INFO: No metadata: $filename</font>");
1158: }
1159: }
1160: rename($transname,$filename);
1161: return OK;
1162: }
1163: }
1164: }
1165: }
1166:
1167: # ------------------------------------------------ Get server side include body
1168: sub ssi_body {
1169: my ($filelink,%form)=@_;
1170: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1171: &ssi($filelink,%form));
1172: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs;
1173: $output=~s/^.*?\<body[^\>]*\>//si;
1174: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1175: return $output;
1176: }
1177:
1178: # --------------------------------------------------------- Server Side Include
1179:
1180: sub ssi {
1181:
1182: my ($fn,%form)=@_;
1183:
1184: my $ua=new LWP::UserAgent;
1185:
1186: my $request;
1187:
1188: if (%form) {
1189: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1190: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1191: } else {
1192: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1193: }
1194:
1195: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1196: my $response=$ua->request($request);
1197:
1198: return $response->content;
1199: }
1200:
1201: sub externalssi {
1202: my ($url)=@_;
1203: my $ua=new LWP::UserAgent;
1204: my $request=new HTTP::Request('GET',$url);
1205: my $response=$ua->request($request);
1206: return $response->content;
1207: }
1208:
1209: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1210:
1211: sub allowuploaded {
1212: my ($srcurl,$url)=@_;
1213: $url=&clutter(&declutter($url));
1214: my $dir=$url;
1215: $dir=~s/\/[^\/]+$//;
1216: my %httpref=();
1217: my $httpurl=&hreflocation('',$url);
1218: $httpref{'httpref.'.$httpurl}=$srcurl;
1219: &Apache::lonnet::appenv(%httpref);
1220: }
1221:
1222: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1223: # input: action, courseID, current domain, home server for course, intended
1224: # path to file, source of file.
1225: # output: url to file (if action was uploaddoc),
1226: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1227: #
1228: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1229: # course.
1230: #
1231: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1232: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1233: # course's home server.
1234: #
1235: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1236: # be copied from $source (current location) to
1237: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1238: # and will then be copied to
1239: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1240: # course's home server.
1241: #
1242: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1243: # will be retrived from $ENV{form.uploaddoc} (from DOCS interface) to
1244: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1245: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1246: # in course's home server.
1247:
1248:
1249: sub process_coursefile {
1250: my ($action,$docuname,$docudom,$docuhome,$file,$source)=@_;
1251: my $fetchresult;
1252: if ($action eq 'propagate') {
1253: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file
1254: ,$docuhome);
1255: } else {
1256: my $fetchresult = '';
1257: my $fpath = '';
1258: my $fname = $file;
1259: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1260: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1261: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1262: unless ($fpath eq '') {
1263: my @parts=split('/',$fpath);
1264: foreach my $part (@parts) {
1265: $filepath.= '/'.$part;
1266: if ((-e $filepath)!=1) {
1267: mkdir($filepath,0777);
1268: }
1269: }
1270: }
1271: if ($action eq 'copy') {
1272: if ($source eq '') {
1273: $fetchresult = 'no source file';
1274: return $fetchresult;
1275: } else {
1276: my $destination = $filepath.'/'.$fname;
1277: rename($source,$destination);
1278: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1279: $docuhome);
1280: }
1281: } elsif ($action eq 'uploaddoc') {
1282: open(my $fh,'>'.$filepath.'/'.$fname);
1283: print $fh $ENV{'form.'.$source};
1284: close($fh);
1285: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1286: $docuhome);
1287: if ($fetchresult eq 'ok') {
1288: return '/uploaded/'.$fpath.'/'.$fname;
1289: } else {
1290: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1291: ' to host '.$docuhome.': '.$fetchresult);
1292: return '/adm/notfound.html';
1293: }
1294: }
1295: }
1296: unless ( $fetchresult eq 'ok') {
1297: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1298: ' to host '.$docuhome.': '.$fetchresult);
1299: }
1300: return $fetchresult;
1301: }
1302:
1303: # --------------- Take an uploaded file and put it into the userfiles directory
1304: # input: name of form element, coursedoc=1 means this is for the course
1305: # output: url of file in userspace
1306:
1307: sub clean_filename {
1308: my ($fname)=@_;
1309: # Replace Windows backslashes by forward slashes
1310: $fname=~s/\\/\//g;
1311: # Get rid of everything but the actual filename
1312: $fname=~s/^.*\/([^\/]+)$/$1/;
1313: # Replace spaces by underscores
1314: $fname=~s/\s+/\_/g;
1315: # Replace all other weird characters by nothing
1316: $fname=~s/[^\w\.\-]//g;
1317: # Replace all .\d. sequences with _\d. so they no longer look like version
1318: # numbers
1319: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1320: return $fname;
1321: }
1322:
1323: sub userfileupload {
1324: my ($formname,$coursedoc,$subdir)=@_;
1325: if (!defined($subdir)) { $subdir='unknown'; }
1326: my $fname=$ENV{'form.'.$formname.'.filename'};
1327: $fname=&clean_filename($fname);
1328: # See if there is anything left
1329: unless ($fname) { return 'error: no uploaded file'; }
1330: chop($ENV{'form.'.$formname});
1331: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1332: my $now = time;
1333: my $filepath = 'tmp/helprequests/'.$now;
1334: my @parts=split(/\//,$filepath);
1335: my $fullpath = $perlvar{'lonDaemons'};
1336: for (my $i=0;$i<@parts;$i++) {
1337: $fullpath .= '/'.$parts[$i];
1338: if ((-e $fullpath)!=1) {
1339: mkdir($fullpath,0777);
1340: }
1341: }
1342: open(my $fh,'>'.$fullpath.'/'.$fname);
1343: print $fh $ENV{'form.'.$formname};
1344: close($fh);
1345: return $fullpath.'/'.$fname;
1346: }
1347: # Create the directory if not present
1348: my $docuname='';
1349: my $docudom='';
1350: my $docuhome='';
1351: $fname="$subdir/$fname";
1352: if ($coursedoc) {
1353: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1354: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1355: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1356: if ($ENV{'form.folder'} =~ m/^default/) {
1357: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1358: } else {
1359: $fname=$ENV{'form.folder'}.'/'.$fname;
1360: return &process_coursefile('uploaddoc',$docuname,$docudom,$docuhome,$fname,$formname);
1361: }
1362: } else {
1363: $docuname=$ENV{'user.name'};
1364: $docudom=$ENV{'user.domain'};
1365: $docuhome=$ENV{'user.home'};
1366: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1367: }
1368: }
1369:
1370: sub finishuserfileupload {
1371: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1372: my $path=$docudom.'/'.$docuname.'/';
1373: my $filepath=$perlvar{'lonDocRoot'};
1374: my ($fnamepath,$file);
1375: $file=$fname;
1376: if ($fname=~m|/|) {
1377: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1378: $path.=$fnamepath.'/';
1379: }
1380: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1381: my $count;
1382: for ($count=4;$count<=$#parts;$count++) {
1383: $filepath.="/$parts[$count]";
1384: if ((-e $filepath)!=1) {
1385: mkdir($filepath,0777);
1386: }
1387: }
1388: # Save the file
1389: {
1390: open(FH,'>'.$filepath.'/'.$file);
1391: print FH $ENV{'form.'.$formname};
1392: close(FH);
1393: }
1394: # Notify homeserver to grep it
1395: #
1396: &Apache::lonnet::logthis("fetching ".$path.$file);
1397: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1398: if ($fetchresult eq 'ok') {
1399: #
1400: # Return the URL to it
1401: return '/uploaded/'.$path.$file;
1402: } else {
1403: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1404: ': '.$fetchresult);
1405: return '/adm/notfound.html';
1406: }
1407: }
1408:
1409: sub removeuploadedurl {
1410: my ($url)=@_;
1411: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1412: return &Apache::lonnet::removeuserfile($uname,$udom,$fname);
1413: }
1414:
1415: sub removeuserfile {
1416: my ($docuname,$docudom,$fname)=@_;
1417: my $home=&homeserver($docuname,$docudom);
1418: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1419: }
1420:
1421: sub mkdiruserfile {
1422: my ($docuname,$docudom,$dir)=@_;
1423: my $home=&homeserver($docuname,$docudom);
1424: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1425: }
1426:
1427: sub renameuserfile {
1428: my ($docuname,$docudom,$old,$new)=@_;
1429: my $home=&homeserver($docuname,$docudom);
1430: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1431: &escape("$new"),$home);
1432: }
1433:
1434: # ------------------------------------------------------------------------- Log
1435:
1436: sub log {
1437: my ($dom,$nam,$hom,$what)=@_;
1438: return critical("log:$dom:$nam:$what",$hom);
1439: }
1440:
1441: # ------------------------------------------------------------------ Course Log
1442: #
1443: # This routine flushes several buffers of non-mission-critical nature
1444: #
1445:
1446: sub flushcourselogs {
1447: &logthis('Flushing log buffers');
1448: #
1449: # course logs
1450: # This is a log of all transactions in a course, which can be used
1451: # for data mining purposes
1452: #
1453: # It also collects the courseid database, which lists last transaction
1454: # times and course titles for all courseids
1455: #
1456: my %courseidbuffer=();
1457: foreach (keys %courselogs) {
1458: my $crsid=$_;
1459: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1460: &escape($courselogs{$crsid}),
1461: $coursehombuf{$crsid}) eq 'ok') {
1462: delete $courselogs{$crsid};
1463: } else {
1464: &logthis('Failed to flush log buffer for '.$crsid);
1465: if (length($courselogs{$crsid})>40000) {
1466: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1467: " exceeded maximum size, deleting.</font>");
1468: delete $courselogs{$crsid};
1469: }
1470: }
1471: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1472: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1473: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1474: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1475: } else {
1476: $courseidbuffer{$coursehombuf{$crsid}}=
1477: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1478: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1479: }
1480: }
1481: #
1482: # Write course id database (reverse lookup) to homeserver of courses
1483: # Is used in pickcourse
1484: #
1485: foreach (keys %courseidbuffer) {
1486: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1487: }
1488: #
1489: # File accesses
1490: # Writes to the dynamic metadata of resources to get hit counts, etc.
1491: #
1492: foreach my $entry (keys(%accesshash)) {
1493: if ($entry =~ /___count$/) {
1494: my ($dom,$name);
1495: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1496: if (! defined($dom) || $dom eq '' ||
1497: ! defined($name) || $name eq '') {
1498: my $cid = $ENV{'request.course.id'};
1499: $dom = $ENV{'request.'.$cid.'.domain'};
1500: $name = $ENV{'request.'.$cid.'.num'};
1501: }
1502: my $value = $accesshash{$entry};
1503: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1504: my %temphash=($url => $value);
1505: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1506: if ($result eq 'ok') {
1507: delete $accesshash{$entry};
1508: } elsif ($result eq 'unknown_cmd') {
1509: # Target server has old code running on it.
1510: my %temphash=($entry => $value);
1511: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1512: delete $accesshash{$entry};
1513: }
1514: }
1515: } else {
1516: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1517: my %temphash=($entry => $accesshash{$entry});
1518: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1519: delete $accesshash{$entry};
1520: }
1521: }
1522: }
1523: #
1524: # Roles
1525: # Reverse lookup of user roles for course faculty/staff and co-authorship
1526: #
1527: foreach (keys %userrolehash) {
1528: my $entry=$_;
1529: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1530: split(/\:/,$entry);
1531: if (&Apache::lonnet::put('nohist_userroles',
1532: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1533: $rudom,$runame) eq 'ok') {
1534: delete $userrolehash{$entry};
1535: }
1536: }
1537: $dumpcount++;
1538: }
1539:
1540: sub courselog {
1541: my $what=shift;
1542: $what=time.':'.$what;
1543: unless ($ENV{'request.course.id'}) { return ''; }
1544: $coursedombuf{$ENV{'request.course.id'}}=
1545: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1546: $coursenumbuf{$ENV{'request.course.id'}}=
1547: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1548: $coursehombuf{$ENV{'request.course.id'}}=
1549: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1550: $coursedescrbuf{$ENV{'request.course.id'}}=
1551: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1552: $courseinstcodebuf{$ENV{'request.course.id'}}=
1553: $ENV{'course.'.$ENV{'request.course.id'}.'.internal.coursecode'};
1554: $courseownerbuf{$ENV{'request.course.id'}}=
1555: $ENV{'course.'.$ENV{'request.course.id'}.'.internal.courseowner'};
1556: if (defined $courselogs{$ENV{'request.course.id'}}) {
1557: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1558: } else {
1559: $courselogs{$ENV{'request.course.id'}}.=$what;
1560: }
1561: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1562: &flushcourselogs();
1563: }
1564: }
1565:
1566: sub courseacclog {
1567: my $fnsymb=shift;
1568: unless ($ENV{'request.course.id'}) { return ''; }
1569: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1570: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1571: $what.=':POST';
1572: # FIXME: Probably ought to escape things....
1573: foreach (keys %ENV) {
1574: if ($_=~/^form\.(.*)/) {
1575: $what.=':'.$1.'='.$ENV{$_};
1576: }
1577: }
1578: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1579: # FIXME: We should not be depending on a form parameter that someone
1580: # editing lonsearchcat.pm might change in the future.
1581: if ($ENV{'form.phase'} eq 'course_search') {
1582: $what.= ':POST';
1583: # FIXME: Probably ought to escape things....
1584: foreach my $element ('courseexp','crsfulltext','crsrelated',
1585: 'crsdiscuss') {
1586: $what.=':'.$element.'='.$ENV{'form.'.$element};
1587: }
1588: }
1589: }
1590: &courselog($what);
1591: }
1592:
1593: sub countacc {
1594: my $url=&declutter(shift);
1595: return if (! defined($url) || $url eq '');
1596: unless ($ENV{'request.course.id'}) { return ''; }
1597: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1598: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1599: $accesshash{$key}++;
1600: }
1601:
1602: sub linklog {
1603: my ($from,$to)=@_;
1604: $from=&declutter($from);
1605: $to=&declutter($to);
1606: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1607: $accesshash{$to.'___'.$from.'___goto'}=1;
1608: }
1609:
1610: sub userrolelog {
1611: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1612: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1613: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1614: ($trole=~/^cr/) || ($trole=~/^ta/)) {
1615: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1616: $userrolehash
1617: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1618: =$tend.':'.$tstart;
1619: }
1620: }
1621:
1622: sub get_course_adv_roles {
1623: my $cid=shift;
1624: $cid=$ENV{'request.course.id'} unless (defined($cid));
1625: my %coursehash=&coursedescription($cid);
1626: my %nothide=();
1627: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1628: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1629: }
1630: my %returnhash=();
1631: my %dumphash=
1632: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1633: my $now=time;
1634: foreach (keys %dumphash) {
1635: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1636: if (($tstart) && ($tstart<0)) { next; }
1637: if (($tend) && ($tend<$now)) { next; }
1638: if (($tstart) && ($now<$tstart)) { next; }
1639: my ($role,$username,$domain,$section)=split(/\:/,$_);
1640: if ($username eq '' || $domain eq '') { next; }
1641: if ((&privileged($username,$domain)) &&
1642: (!$nothide{$username.':'.$domain})) { next; }
1643: my $key=&plaintext($role);
1644: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1645: if ($returnhash{$key}) {
1646: $returnhash{$key}.=','.$username.':'.$domain;
1647: } else {
1648: $returnhash{$key}=$username.':'.$domain;
1649: }
1650: }
1651: return %returnhash;
1652: }
1653:
1654: sub get_my_roles {
1655: my ($uname,$udom)=@_;
1656: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1657: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1658: my %dumphash=
1659: &dump('nohist_userroles',$udom,$uname);
1660: my %returnhash=();
1661: my $now=time;
1662: foreach (keys %dumphash) {
1663: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1664: if (($tstart) && ($tstart<0)) { next; }
1665: if (($tend) && ($tend<$now)) { next; }
1666: if (($tstart) && ($now<$tstart)) { next; }
1667: my ($role,$username,$domain,$section)=split(/\:/,$_);
1668: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1669: }
1670: return %returnhash;
1671: }
1672:
1673: # ----------------------------------------------------- Frontpage Announcements
1674: #
1675: #
1676:
1677: sub postannounce {
1678: my ($server,$text)=@_;
1679: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1680: unless ($text=~/\w/) { $text=''; }
1681: return &reply('setannounce:'.&escape($text),$server);
1682: }
1683:
1684: sub getannounce {
1685:
1686: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1687: my $announcement='';
1688: while (<$fh>) { $announcement .=$_; }
1689: close($fh);
1690: if ($announcement=~/\w/) {
1691: return
1692: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1693: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1694: } else {
1695: return '';
1696: }
1697: } else {
1698: return '';
1699: }
1700: }
1701:
1702: # ---------------------------------------------------------- Course ID routines
1703: # Deal with domain's nohist_courseid.db files
1704: #
1705:
1706: sub courseidput {
1707: my ($domain,$what,$coursehome)=@_;
1708: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1709: }
1710:
1711: sub courseiddump {
1712: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$hostidflag,$hostidref)=@_;
1713: my %returnhash=();
1714: unless ($domfilter) { $domfilter=''; }
1715: foreach my $tryserver (keys %libserv) {
1716: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1717: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1718: foreach (
1719: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1720: $sincefilter.':'.&escape($descfilter).':'.
1721: &escape($instcodefilter).':'.&escape($ownerfilter),
1722: $tryserver))) {
1723: my ($key,$value)=split(/\=/,$_);
1724: if (($key) && ($value)) {
1725: $returnhash{&unescape($key)}=$value;
1726: }
1727: }
1728: }
1729: }
1730: }
1731: return %returnhash;
1732: }
1733:
1734: #
1735: # ----------------------------------------------------------- Check out an item
1736:
1737: sub get_first_access {
1738: my ($type,$argsymb)=@_;
1739: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1740: if ($argsymb) { $symb=$argsymb; }
1741: my ($map,$id,$res)=&decode_symb($symb);
1742: if ($type eq 'map') {
1743: $res=&symbread($map);
1744: } else {
1745: $res=$symb;
1746: }
1747: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
1748: return $times{"$courseid\0$res"};
1749: }
1750:
1751: sub set_first_access {
1752: my ($type)=@_;
1753: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1754: my ($map,$id,$res)=&decode_symb($symb);
1755: if ($type eq 'map') {
1756: $res=&symbread($map);
1757: } else {
1758: $res=$symb;
1759: }
1760: my $firstaccess=&get_first_access($type,$symb);
1761: if (!$firstaccess) {
1762: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
1763: }
1764: return 'already_set';
1765: }
1766:
1767: sub checkout {
1768: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1769: my $now=time;
1770: my $lonhost=$perlvar{'lonHostID'};
1771: my $infostr=&escape(
1772: 'CHECKOUTTOKEN&'.
1773: $tuname.'&'.
1774: $tudom.'&'.
1775: $tcrsid.'&'.
1776: $symb.'&'.
1777: $now.'&'.$ENV{'REMOTE_ADDR'});
1778: my $token=&reply('tmpput:'.$infostr,$lonhost);
1779: if ($token=~/^error\:/) {
1780: &logthis("<font color=blue>WARNING: ".
1781: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1782: "</font>");
1783: return '';
1784: }
1785:
1786: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1787: $token=~tr/a-z/A-Z/;
1788:
1789: my %infohash=('resource.0.outtoken' => $token,
1790: 'resource.0.checkouttime' => $now,
1791: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1792:
1793: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1794: return '';
1795: } else {
1796: &logthis("<font color=blue>WARNING: ".
1797: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1798: "</font>");
1799: }
1800:
1801: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1802: &escape('Checkout '.$infostr.' - '.
1803: $token)) ne 'ok') {
1804: return '';
1805: } else {
1806: &logthis("<font color=blue>WARNING: ".
1807: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1808: "</font>");
1809: }
1810: return $token;
1811: }
1812:
1813: # ------------------------------------------------------------ Check in an item
1814:
1815: sub checkin {
1816: my $token=shift;
1817: my $now=time;
1818: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1819: $lonhost=~tr/A-Z/a-z/;
1820: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1821: $dtoken=~s/\W/\_/g;
1822: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1823: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1824:
1825: unless (($tuname) && ($tudom)) {
1826: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1827: return '';
1828: }
1829:
1830: unless (&allowed('mgr',$tcrsid)) {
1831: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1832: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1833: return '';
1834: }
1835:
1836: my %infohash=('resource.0.intoken' => $token,
1837: 'resource.0.checkintime' => $now,
1838: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1839:
1840: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1841: return '';
1842: }
1843:
1844: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1845: &escape('Checkin - '.$token)) ne 'ok') {
1846: return '';
1847: }
1848:
1849: return ($symb,$tuname,$tudom,$tcrsid);
1850: }
1851:
1852: # --------------------------------------------- Set Expire Date for Spreadsheet
1853:
1854: sub expirespread {
1855: my ($uname,$udom,$stype,$usymb)=@_;
1856: my $cid=$ENV{'request.course.id'};
1857: if ($cid) {
1858: my $now=time;
1859: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1860: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1861: $ENV{'course.'.$cid.'.num'}.
1862: ':nohist_expirationdates:'.
1863: &escape($key).'='.$now,
1864: $ENV{'course.'.$cid.'.home'})
1865: }
1866: return 'ok';
1867: }
1868:
1869: # ----------------------------------------------------- Devalidate Spreadsheets
1870:
1871: sub devalidate {
1872: my ($symb,$uname,$udom)=@_;
1873: my $cid=$ENV{'request.course.id'};
1874: if ($cid) {
1875: # delete the stored spreadsheets for
1876: # - the student level sheet of this user in course's homespace
1877: # - the assessment level sheet for this resource
1878: # for this user in user's homespace
1879: # - current conditional state info
1880: my $key=$uname.':'.$udom.':';
1881: my $status=
1882: &del('nohist_calculatedsheets',
1883: [$key.'studentcalc:'],
1884: $ENV{'course.'.$cid.'.domain'},
1885: $ENV{'course.'.$cid.'.num'})
1886: .' '.
1887: &del('nohist_calculatedsheets_'.$cid,
1888: [$key.'assesscalc:'.$symb],$udom,$uname);
1889: unless ($status eq 'ok ok') {
1890: &logthis('Could not devalidate spreadsheet '.
1891: $uname.' at '.$udom.' for '.
1892: $symb.': '.$status);
1893: }
1894: &delenv('user.state.'.$cid);
1895: }
1896: }
1897:
1898: sub get_scalar {
1899: my ($string,$end) = @_;
1900: my $value;
1901: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1902: $value = $1;
1903: } elsif ($$string =~ s/^([^&]*?)&//) {
1904: $value = $1;
1905: }
1906: return &unescape($value);
1907: }
1908:
1909: sub array2str {
1910: my (@array) = @_;
1911: my $result=&arrayref2str(\@array);
1912: $result=~s/^__ARRAY_REF__//;
1913: $result=~s/__END_ARRAY_REF__$//;
1914: return $result;
1915: }
1916:
1917: sub arrayref2str {
1918: my ($arrayref) = @_;
1919: my $result='__ARRAY_REF__';
1920: foreach my $elem (@$arrayref) {
1921: if(ref($elem) eq 'ARRAY') {
1922: $result.=&arrayref2str($elem).'&';
1923: } elsif(ref($elem) eq 'HASH') {
1924: $result.=&hashref2str($elem).'&';
1925: } elsif(ref($elem)) {
1926: #print("Got a ref of ".(ref($elem))." skipping.");
1927: } else {
1928: $result.=&escape($elem).'&';
1929: }
1930: }
1931: $result=~s/\&$//;
1932: $result .= '__END_ARRAY_REF__';
1933: return $result;
1934: }
1935:
1936: sub hash2str {
1937: my (%hash) = @_;
1938: my $result=&hashref2str(\%hash);
1939: $result=~s/^__HASH_REF__//;
1940: $result=~s/__END_HASH_REF__$//;
1941: return $result;
1942: }
1943:
1944: sub hashref2str {
1945: my ($hashref)=@_;
1946: my $result='__HASH_REF__';
1947: foreach (sort(keys(%$hashref))) {
1948: if (ref($_) eq 'ARRAY') {
1949: $result.=&arrayref2str($_).'=';
1950: } elsif (ref($_) eq 'HASH') {
1951: $result.=&hashref2str($_).'=';
1952: } elsif (ref($_)) {
1953: $result.='=';
1954: #print("Got a ref of ".(ref($_))." skipping.");
1955: } else {
1956: if ($_) {$result.=&escape($_).'=';} else { last; }
1957: }
1958:
1959: if(ref($hashref->{$_}) eq 'ARRAY') {
1960: $result.=&arrayref2str($hashref->{$_}).'&';
1961: } elsif(ref($hashref->{$_}) eq 'HASH') {
1962: $result.=&hashref2str($hashref->{$_}).'&';
1963: } elsif(ref($hashref->{$_})) {
1964: $result.='&';
1965: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1966: } else {
1967: $result.=&escape($hashref->{$_}).'&';
1968: }
1969: }
1970: $result=~s/\&$//;
1971: $result .= '__END_HASH_REF__';
1972: return $result;
1973: }
1974:
1975: sub str2hash {
1976: my ($string)=@_;
1977: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1978: return %$hash;
1979: }
1980:
1981: sub str2hashref {
1982: my ($string) = @_;
1983:
1984: my %hash;
1985:
1986: if($string !~ /^__HASH_REF__/) {
1987: if (! ($string eq '' || !defined($string))) {
1988: $hash{'error'}='Not hash reference';
1989: }
1990: return (\%hash, $string);
1991: }
1992:
1993: $string =~ s/^__HASH_REF__//;
1994:
1995: while($string !~ /^__END_HASH_REF__/) {
1996: #key
1997: my $key='';
1998: if($string =~ /^__HASH_REF__/) {
1999: ($key, $string)=&str2hashref($string);
2000: if(defined($key->{'error'})) {
2001: $hash{'error'}='Bad data';
2002: return (\%hash, $string);
2003: }
2004: } elsif($string =~ /^__ARRAY_REF__/) {
2005: ($key, $string)=&str2arrayref($string);
2006: if($key->[0] eq 'Array reference error') {
2007: $hash{'error'}='Bad data';
2008: return (\%hash, $string);
2009: }
2010: } else {
2011: $string =~ s/^(.*?)=//;
2012: $key=&unescape($1);
2013: }
2014: $string =~ s/^=//;
2015:
2016: #value
2017: my $value='';
2018: if($string =~ /^__HASH_REF__/) {
2019: ($value, $string)=&str2hashref($string);
2020: if(defined($value->{'error'})) {
2021: $hash{'error'}='Bad data';
2022: return (\%hash, $string);
2023: }
2024: } elsif($string =~ /^__ARRAY_REF__/) {
2025: ($value, $string)=&str2arrayref($string);
2026: if($value->[0] eq 'Array reference error') {
2027: $hash{'error'}='Bad data';
2028: return (\%hash, $string);
2029: }
2030: } else {
2031: $value=&get_scalar(\$string,'__END_HASH_REF__');
2032: }
2033: $string =~ s/^&//;
2034:
2035: $hash{$key}=$value;
2036: }
2037:
2038: $string =~ s/^__END_HASH_REF__//;
2039:
2040: return (\%hash, $string);
2041: }
2042:
2043: sub str2array {
2044: my ($string)=@_;
2045: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2046: return @$array;
2047: }
2048:
2049: sub str2arrayref {
2050: my ($string) = @_;
2051: my @array;
2052:
2053: if($string !~ /^__ARRAY_REF__/) {
2054: if (! ($string eq '' || !defined($string))) {
2055: $array[0]='Array reference error';
2056: }
2057: return (\@array, $string);
2058: }
2059:
2060: $string =~ s/^__ARRAY_REF__//;
2061:
2062: while($string !~ /^__END_ARRAY_REF__/) {
2063: my $value='';
2064: if($string =~ /^__HASH_REF__/) {
2065: ($value, $string)=&str2hashref($string);
2066: if(defined($value->{'error'})) {
2067: $array[0] ='Array reference error';
2068: return (\@array, $string);
2069: }
2070: } elsif($string =~ /^__ARRAY_REF__/) {
2071: ($value, $string)=&str2arrayref($string);
2072: if($value->[0] eq 'Array reference error') {
2073: $array[0] ='Array reference error';
2074: return (\@array, $string);
2075: }
2076: } else {
2077: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2078: }
2079: $string =~ s/^&//;
2080:
2081: push(@array, $value);
2082: }
2083:
2084: $string =~ s/^__END_ARRAY_REF__//;
2085:
2086: return (\@array, $string);
2087: }
2088:
2089: # -------------------------------------------------------------------Temp Store
2090:
2091: sub tmpreset {
2092: my ($symb,$namespace,$domain,$stuname) = @_;
2093: if (!$symb) {
2094: $symb=&symbread();
2095: if (!$symb) { $symb= $ENV{'request.url'}; }
2096: }
2097: $symb=escape($symb);
2098:
2099: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2100: $namespace=~s/\//\_/g;
2101: $namespace=~s/\W//g;
2102:
2103: #FIXME needs to do something for /pub resources
2104: if (!$domain) { $domain=$ENV{'user.domain'}; }
2105: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2106: my $path=$perlvar{'lonDaemons'}.'/tmp';
2107: my %hash;
2108: if (tie(%hash,'GDBM_File',
2109: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2110: &GDBM_WRCREAT(),0640)) {
2111: foreach my $key (keys %hash) {
2112: if ($key=~ /:$symb/) {
2113: delete($hash{$key});
2114: }
2115: }
2116: }
2117: }
2118:
2119: sub tmpstore {
2120: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2121:
2122: if (!$symb) {
2123: $symb=&symbread();
2124: if (!$symb) { $symb= $ENV{'request.url'}; }
2125: }
2126: $symb=escape($symb);
2127:
2128: if (!$namespace) {
2129: # I don't think we would ever want to store this for a course.
2130: # it seems this will only be used if we don't have a course.
2131: #$namespace=$ENV{'request.course.id'};
2132: #if (!$namespace) {
2133: $namespace=$ENV{'request.state'};
2134: #}
2135: }
2136: $namespace=~s/\//\_/g;
2137: $namespace=~s/\W//g;
2138: #FIXME needs to do something for /pub resources
2139: if (!$domain) { $domain=$ENV{'user.domain'}; }
2140: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2141: my $now=time;
2142: my %hash;
2143: my $path=$perlvar{'lonDaemons'}.'/tmp';
2144: if (tie(%hash,'GDBM_File',
2145: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2146: &GDBM_WRCREAT(),0640)) {
2147: $hash{"version:$symb"}++;
2148: my $version=$hash{"version:$symb"};
2149: my $allkeys='';
2150: foreach my $key (keys(%$storehash)) {
2151: $allkeys.=$key.':';
2152: $hash{"$version:$symb:$key"}=$$storehash{$key};
2153: }
2154: $hash{"$version:$symb:timestamp"}=$now;
2155: $allkeys.='timestamp';
2156: $hash{"$version:keys:$symb"}=$allkeys;
2157: if (untie(%hash)) {
2158: return 'ok';
2159: } else {
2160: return "error:$!";
2161: }
2162: } else {
2163: return "error:$!";
2164: }
2165: }
2166:
2167: # -----------------------------------------------------------------Temp Restore
2168:
2169: sub tmprestore {
2170: my ($symb,$namespace,$domain,$stuname) = @_;
2171:
2172: if (!$symb) {
2173: $symb=&symbread();
2174: if (!$symb) { $symb= $ENV{'request.url'}; }
2175: }
2176: $symb=escape($symb);
2177:
2178: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2179: #FIXME needs to do something for /pub resources
2180: if (!$domain) { $domain=$ENV{'user.domain'}; }
2181: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2182:
2183: my %returnhash;
2184: $namespace=~s/\//\_/g;
2185: $namespace=~s/\W//g;
2186: my %hash;
2187: my $path=$perlvar{'lonDaemons'}.'/tmp';
2188: if (tie(%hash,'GDBM_File',
2189: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2190: &GDBM_READER(),0640)) {
2191: my $version=$hash{"version:$symb"};
2192: $returnhash{'version'}=$version;
2193: my $scope;
2194: for ($scope=1;$scope<=$version;$scope++) {
2195: my $vkeys=$hash{"$scope:keys:$symb"};
2196: my @keys=split(/:/,$vkeys);
2197: my $key;
2198: $returnhash{"$scope:keys"}=$vkeys;
2199: foreach $key (@keys) {
2200: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
2201: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
2202: }
2203: }
2204: if (!(untie(%hash))) {
2205: return "error:$!";
2206: }
2207: } else {
2208: return "error:$!";
2209: }
2210: return %returnhash;
2211: }
2212:
2213: # ----------------------------------------------------------------------- Store
2214:
2215: sub store {
2216: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2217: my $home='';
2218:
2219: if ($stuname) { $home=&homeserver($stuname,$domain); }
2220:
2221: $symb=&symbclean($symb);
2222: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2223:
2224: if (!$domain) { $domain=$ENV{'user.domain'}; }
2225: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2226:
2227: &devalidate($symb,$stuname,$domain);
2228:
2229: $symb=escape($symb);
2230: if (!$namespace) {
2231: unless ($namespace=$ENV{'request.course.id'}) {
2232: return '';
2233: }
2234: }
2235: if (!$home) { $home=$ENV{'user.home'}; }
2236:
2237: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2238: $$storehash{'host'}=$perlvar{'lonHostID'};
2239:
2240: my $namevalue='';
2241: foreach (keys %$storehash) {
2242: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2243: }
2244: $namevalue=~s/\&$//;
2245: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2246: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2247: }
2248:
2249: # -------------------------------------------------------------- Critical Store
2250:
2251: sub cstore {
2252: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2253: my $home='';
2254:
2255: if ($stuname) { $home=&homeserver($stuname,$domain); }
2256:
2257: $symb=&symbclean($symb);
2258: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2259:
2260: if (!$domain) { $domain=$ENV{'user.domain'}; }
2261: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2262:
2263: &devalidate($symb,$stuname,$domain);
2264:
2265: $symb=escape($symb);
2266: if (!$namespace) {
2267: unless ($namespace=$ENV{'request.course.id'}) {
2268: return '';
2269: }
2270: }
2271: if (!$home) { $home=$ENV{'user.home'}; }
2272:
2273: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2274: $$storehash{'host'}=$perlvar{'lonHostID'};
2275:
2276: my $namevalue='';
2277: foreach (keys %$storehash) {
2278: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2279: }
2280: $namevalue=~s/\&$//;
2281: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2282: return critical
2283: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2284: }
2285:
2286: # --------------------------------------------------------------------- Restore
2287:
2288: sub restore {
2289: my ($symb,$namespace,$domain,$stuname) = @_;
2290: my $home='';
2291:
2292: if ($stuname) { $home=&homeserver($stuname,$domain); }
2293:
2294: if (!$symb) {
2295: unless ($symb=escape(&symbread())) { return ''; }
2296: } else {
2297: $symb=&escape(&symbclean($symb));
2298: }
2299: if (!$namespace) {
2300: unless ($namespace=$ENV{'request.course.id'}) {
2301: return '';
2302: }
2303: }
2304: if (!$domain) { $domain=$ENV{'user.domain'}; }
2305: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2306: if (!$home) { $home=$ENV{'user.home'}; }
2307: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2308:
2309: my %returnhash=();
2310: foreach (split(/\&/,$answer)) {
2311: my ($name,$value)=split(/\=/,$_);
2312: $returnhash{&unescape($name)}=&unescape($value);
2313: }
2314: my $version;
2315: for ($version=1;$version<=$returnhash{'version'};$version++) {
2316: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2317: $returnhash{$_}=$returnhash{$version.':'.$_};
2318: }
2319: }
2320: return %returnhash;
2321: }
2322:
2323: # ---------------------------------------------------------- Course Description
2324:
2325: sub coursedescription {
2326: my $courseid=shift;
2327: $courseid=~s/^\///;
2328: $courseid=~s/\_/\//g;
2329: my ($cdomain,$cnum)=split(/\//,$courseid);
2330: my $chome=&homeserver($cnum,$cdomain);
2331: my $normalid=$cdomain.'_'.$cnum;
2332: # need to always cache even if we get errors otherwise we keep
2333: # trying and trying and trying to get the course description.
2334: my %envhash=();
2335: my %returnhash=();
2336: $envhash{'course.'.$normalid.'.last_cache'}=time;
2337: if ($chome ne 'no_host') {
2338: %returnhash=&dump('environment',$cdomain,$cnum);
2339: if (!exists($returnhash{'con_lost'})) {
2340: $returnhash{'home'}= $chome;
2341: $returnhash{'domain'} = $cdomain;
2342: $returnhash{'num'} = $cnum;
2343: while (my ($name,$value) = each %returnhash) {
2344: $envhash{'course.'.$normalid.'.'.$name}=$value;
2345: }
2346: $returnhash{'url'}=&clutter($returnhash{'url'});
2347: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2348: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
2349: $envhash{'course.'.$normalid.'.home'}=$chome;
2350: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2351: $envhash{'course.'.$normalid.'.num'}=$cnum;
2352: }
2353: }
2354: &appenv(%envhash);
2355: return %returnhash;
2356: }
2357:
2358: # -------------------------------------------------See if a user is privileged
2359:
2360: sub privileged {
2361: my ($username,$domain)=@_;
2362: my $rolesdump=&reply("dump:$domain:$username:roles",
2363: &homeserver($username,$domain));
2364: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2365: my $now=time;
2366: if ($rolesdump ne '') {
2367: foreach (split(/&/,$rolesdump)) {
2368: if ($_!~/^rolesdef_/) {
2369: my ($area,$role)=split(/=/,$_);
2370: $area=~s/\_\w\w$//;
2371: my ($trole,$tend,$tstart)=split(/_/,$role);
2372: if (($trole eq 'dc') || ($trole eq 'su')) {
2373: my $active=1;
2374: if ($tend) {
2375: if ($tend<$now) { $active=0; }
2376: }
2377: if ($tstart) {
2378: if ($tstart>$now) { $active=0; }
2379: }
2380: if ($active) { return 1; }
2381: }
2382: }
2383: }
2384: }
2385: return 0;
2386: }
2387:
2388: # -------------------------------------------------------- Get user privileges
2389:
2390: sub rolesinit {
2391: my ($domain,$username,$authhost)=@_;
2392: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2393: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2394: my %allroles=();
2395: my $now=time;
2396: my $userroles="user.login.time=$now\n";
2397:
2398: if ($rolesdump ne '') {
2399: foreach (split(/&/,$rolesdump)) {
2400: if ($_!~/^rolesdef_/) {
2401: my ($area,$role)=split(/=/,$_);
2402: $area=~s/\_\w\w$//;
2403:
2404: my ($trole,$tend,$tstart);
2405: if ($role=~/^cr/) {
2406: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2407: ($tend,$tstart)=split('_',$trest);
2408: } else {
2409: ($trole,$tend,$tstart)=split(/_/,$role);
2410: }
2411: $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username);
2412: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2413: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2414: if (($area ne '') && ($trole ne '')) {
2415: my $spec=$trole.'.'.$area;
2416: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2417: if ($trole =~ /^cr\//) {
2418: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2419: } else {
2420: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2421: }
2422: }
2423: }
2424: }
2425: my ($author,$adv) = &set_userprivs(\$userroles,\%allroles);
2426: $userroles.='user.adv='.$adv."\n".
2427: 'user.author='.$author."\n";
2428: $ENV{'user.adv'}=$adv;
2429: }
2430: return $userroles;
2431: }
2432:
2433: sub set_arearole {
2434: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2435: # log the associated role with the area
2436: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2437: return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
2438: }
2439:
2440: sub custom_roleprivs {
2441: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2442: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2443: my $homsvr=homeserver($rauthor,$rdomain);
2444: if ($hostname{$homsvr} ne '') {
2445: my ($rdummy,$roledef)=
2446: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2447: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2448: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2449: if (defined($syspriv)) {
2450: $$allroles{'cm./'}.=':'.$syspriv;
2451: $$allroles{$spec.'./'}.=':'.$syspriv;
2452: }
2453: if ($tdomain ne '') {
2454: if (defined($dompriv)) {
2455: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2456: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2457: }
2458: if (($trest ne '') && (defined($coursepriv))) {
2459: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2460: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2461: }
2462: }
2463: }
2464: }
2465: }
2466:
2467:
2468: sub standard_roleprivs {
2469: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2470: if (defined($pr{$trole.':s'})) {
2471: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2472: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2473: }
2474: if ($tdomain ne '') {
2475: if (defined($pr{$trole.':d'})) {
2476: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2477: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2478: }
2479: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2480: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2481: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2482: }
2483: }
2484: }
2485:
2486: sub set_userprivs {
2487: my ($userroles,$allroles) = @_;
2488: my $author=0;
2489: my $adv=0;
2490: foreach (keys %{$allroles}) {
2491: my %thesepriv=();
2492: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2493: foreach (split(/:/,$$allroles{$_})) {
2494: if ($_ ne '') {
2495: my ($privilege,$restrictions)=split(/&/,$_);
2496: if ($restrictions eq '') {
2497: $thesepriv{$privilege}='F';
2498: } elsif ($thesepriv{$privilege} ne 'F') {
2499: $thesepriv{$privilege}.=$restrictions;
2500: }
2501: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2502: }
2503: }
2504: my $thesestr='';
2505: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2506: $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
2507: }
2508: return ($author,$adv);
2509: }
2510:
2511: # --------------------------------------------------------------- get interface
2512:
2513: sub get {
2514: my ($namespace,$storearr,$udomain,$uname)=@_;
2515: my $items='';
2516: foreach (@$storearr) {
2517: $items.=escape($_).'&';
2518: }
2519: $items=~s/\&$//;
2520: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2521: if (!$uname) { $uname=$ENV{'user.name'}; }
2522: my $uhome=&homeserver($uname,$udomain);
2523:
2524: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2525: my @pairs=split(/\&/,$rep);
2526: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2527: return @pairs;
2528: }
2529: my %returnhash=();
2530: my $i=0;
2531: foreach (@$storearr) {
2532: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2533: $i++;
2534: }
2535: return %returnhash;
2536: }
2537:
2538: # --------------------------------------------------------------- del interface
2539:
2540: sub del {
2541: my ($namespace,$storearr,$udomain,$uname)=@_;
2542: my $items='';
2543: foreach (@$storearr) {
2544: $items.=escape($_).'&';
2545: }
2546: $items=~s/\&$//;
2547: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2548: if (!$uname) { $uname=$ENV{'user.name'}; }
2549: my $uhome=&homeserver($uname,$udomain);
2550:
2551: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2552: }
2553:
2554: # -------------------------------------------------------------- dump interface
2555:
2556: sub dump {
2557: my ($namespace,$udomain,$uname,$regexp)=@_;
2558: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2559: if (!$uname) { $uname=$ENV{'user.name'}; }
2560: my $uhome=&homeserver($uname,$udomain);
2561: if ($regexp) {
2562: $regexp=&escape($regexp);
2563: } else {
2564: $regexp='.';
2565: }
2566: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2567: my @pairs=split(/\&/,$rep);
2568: my %returnhash=();
2569: foreach (@pairs) {
2570: my ($key,$value)=split(/=/,$_);
2571: $returnhash{unescape($key)}=&thaw_unescape($value);
2572: }
2573: return %returnhash;
2574: }
2575:
2576: # -------------------------------------------------------------- keys interface
2577:
2578: sub getkeys {
2579: my ($namespace,$udomain,$uname)=@_;
2580: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2581: if (!$uname) { $uname=$ENV{'user.name'}; }
2582: my $uhome=&homeserver($uname,$udomain);
2583: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2584: my @keyarray=();
2585: foreach (split(/\&/,$rep)) {
2586: push (@keyarray,&unescape($_));
2587: }
2588: return @keyarray;
2589: }
2590:
2591: # --------------------------------------------------------------- currentdump
2592: sub currentdump {
2593: my ($courseid,$sdom,$sname)=@_;
2594: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2595: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2596: $sname = $ENV{'user.name'} if (! defined($sname));
2597: my $uhome = &homeserver($sname,$sdom);
2598: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2599: return if ($rep =~ /^(error:|no_such_host)/);
2600: #
2601: my %returnhash=();
2602: #
2603: if ($rep eq "unknown_cmd") {
2604: # an old lond will not know currentdump
2605: # Do a dump and make it look like a currentdump
2606: my @tmp = &dump($courseid,$sdom,$sname,'.');
2607: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2608: my %hash = @tmp;
2609: @tmp=();
2610: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2611: } else {
2612: my @pairs=split(/\&/,$rep);
2613: foreach (@pairs) {
2614: my ($key,$value)=split(/=/,$_);
2615: my ($symb,$param) = split(/:/,$key);
2616: $returnhash{&unescape($symb)}->{&unescape($param)} =
2617: &thaw_unescape($value);
2618: }
2619: }
2620: return %returnhash;
2621: }
2622:
2623: sub convert_dump_to_currentdump{
2624: my %hash = %{shift()};
2625: my %returnhash;
2626: # Code ripped from lond, essentially. The only difference
2627: # here is the unescaping done by lonnet::dump(). Conceivably
2628: # we might run in to problems with parameter names =~ /^v\./
2629: while (my ($key,$value) = each(%hash)) {
2630: my ($v,$symb,$param) = split(/:/,$key);
2631: next if ($v eq 'version' || $symb eq 'keys');
2632: next if (exists($returnhash{$symb}) &&
2633: exists($returnhash{$symb}->{$param}) &&
2634: $returnhash{$symb}->{'v.'.$param} > $v);
2635: $returnhash{$symb}->{$param}=$value;
2636: $returnhash{$symb}->{'v.'.$param}=$v;
2637: }
2638: #
2639: # Remove all of the keys in the hashes which keep track of
2640: # the version of the parameter.
2641: while (my ($symb,$param_hash) = each(%returnhash)) {
2642: # use a foreach because we are going to delete from the hash.
2643: foreach my $key (keys(%$param_hash)) {
2644: delete($param_hash->{$key}) if ($key =~ /^v\./);
2645: }
2646: }
2647: return \%returnhash;
2648: }
2649:
2650: # --------------------------------------------------------------- inc interface
2651:
2652: sub inc {
2653: my ($namespace,$store,$udomain,$uname) = @_;
2654: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2655: if (!$uname) { $uname=$ENV{'user.name'}; }
2656: my $uhome=&homeserver($uname,$udomain);
2657: my $items='';
2658: if (! ref($store)) {
2659: # got a single value, so use that instead
2660: $items = &escape($store).'=&';
2661: } elsif (ref($store) eq 'SCALAR') {
2662: $items = &escape($$store).'=&';
2663: } elsif (ref($store) eq 'ARRAY') {
2664: $items = join('=&',map {&escape($_);} @{$store});
2665: } elsif (ref($store) eq 'HASH') {
2666: while (my($key,$value) = each(%{$store})) {
2667: $items.= &escape($key).'='.&escape($value).'&';
2668: }
2669: }
2670: $items=~s/\&$//;
2671: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2672: }
2673:
2674: # --------------------------------------------------------------- put interface
2675:
2676: sub put {
2677: my ($namespace,$storehash,$udomain,$uname)=@_;
2678: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2679: if (!$uname) { $uname=$ENV{'user.name'}; }
2680: my $uhome=&homeserver($uname,$udomain);
2681: my $items='';
2682: foreach (keys %$storehash) {
2683: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2684: }
2685: $items=~s/\&$//;
2686: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2687: }
2688:
2689: # ---------------------------------------------------------- putstore interface
2690:
2691: sub putstore {
2692: my ($namespace,$storehash,$udomain,$uname)=@_;
2693: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2694: if (!$uname) { $uname=$ENV{'user.name'}; }
2695: my $uhome=&homeserver($uname,$udomain);
2696: my $items='';
2697: my %allitems = ();
2698: foreach (keys %$storehash) {
2699: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
2700: my $key = $1.':keys:'.$2;
2701: $allitems{$key} .= $3.':';
2702: }
2703: $items.=$_.'='.&escape($$storehash{$_}).'&';
2704: }
2705: foreach (keys %allitems) {
2706: $allitems{$_} =~ s/\:$//;
2707: $items.= $_.'='.$allitems{$_}.'&';
2708: }
2709: $items=~s/\&$//;
2710: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2711: }
2712:
2713: # ------------------------------------------------------ critical put interface
2714:
2715: sub cput {
2716: my ($namespace,$storehash,$udomain,$uname)=@_;
2717: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2718: if (!$uname) { $uname=$ENV{'user.name'}; }
2719: my $uhome=&homeserver($uname,$udomain);
2720: my $items='';
2721: foreach (keys %$storehash) {
2722: $items.=escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2723: }
2724: $items=~s/\&$//;
2725: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2726: }
2727:
2728: # -------------------------------------------------------------- eget interface
2729:
2730: sub eget {
2731: my ($namespace,$storearr,$udomain,$uname)=@_;
2732: my $items='';
2733: foreach (@$storearr) {
2734: $items.=escape($_).'&';
2735: }
2736: $items=~s/\&$//;
2737: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2738: if (!$uname) { $uname=$ENV{'user.name'}; }
2739: my $uhome=&homeserver($uname,$udomain);
2740: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2741: my @pairs=split(/\&/,$rep);
2742: my %returnhash=();
2743: my $i=0;
2744: foreach (@$storearr) {
2745: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2746: $i++;
2747: }
2748: return %returnhash;
2749: }
2750:
2751: # ---------------------------------------------- Custom access rule evaluation
2752:
2753: sub customaccess {
2754: my ($priv,$uri)=@_;
2755: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2756: $urealm=~s/^\W//;
2757: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2758: my $access=0;
2759: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2760: my ($effect,$realm,$role)=split(/\:/,$_);
2761: if ($role) {
2762: if ($role ne $urole) { next; }
2763: }
2764: foreach (split(/\s*\,\s*/,$realm)) {
2765: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2766: if ($tdom) {
2767: if ($tdom ne $udom) { next; }
2768: }
2769: if ($tcrs) {
2770: if ($tcrs ne $ucrs) { next; }
2771: }
2772: if ($tsec) {
2773: if ($tsec ne $usec) { next; }
2774: }
2775: $access=($effect eq 'allow');
2776: last;
2777: }
2778: if ($realm eq '' && $role eq '') {
2779: $access=($effect eq 'allow');
2780: }
2781: }
2782: return $access;
2783: }
2784:
2785: # ------------------------------------------------- Check for a user privilege
2786:
2787: sub allowed {
2788: my ($priv,$uri,$symb)=@_;
2789: $uri=&deversion($uri);
2790: my $orguri=$uri;
2791: $uri=&declutter($uri);
2792:
2793:
2794:
2795: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
2796: # Free bre access to adm and meta resources
2797: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
2798: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2799: return 'F';
2800: }
2801:
2802: # Free bre access to user's own portfolio contents
2803: my ($space,$domain,$name,$dir)=split('/',$uri);
2804: if (('uploaded' eq $space) && ($ENV{'user.name'} eq $name) &&
2805: ($ENV{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
2806: return 'F';
2807: }
2808:
2809: # Free bre to public access
2810:
2811: if ($priv eq 'bre') {
2812: my $copyright=&metadata($uri,'copyright');
2813: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2814: return 'F';
2815: }
2816: if ($copyright eq 'priv') {
2817: $uri=~/([^\/]+)\/([^\/]+)\//;
2818: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2819: return '';
2820: }
2821: }
2822: if ($copyright eq 'domain') {
2823: $uri=~/([^\/]+)\/([^\/]+)\//;
2824: unless (($ENV{'user.domain'} eq $1) ||
2825: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2826: return '';
2827: }
2828: }
2829: if ($ENV{'request.role'}=~ /li\.\//) {
2830: # Library role, so allow browsing of resources in this domain.
2831: return 'F';
2832: }
2833: if ($copyright eq 'custom') {
2834: unless (&customaccess($priv,$uri)) { return ''; }
2835: }
2836: }
2837: # Domain coordinator is trying to create a course
2838: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2839: # uri is the requested domain in this case.
2840: # comparison to 'request.role.domain' shows if the user has selected
2841: # a role of dc for the domain in question.
2842: return 'F' if ($uri eq $ENV{'request.role.domain'});
2843: }
2844:
2845: my $thisallowed='';
2846: my $statecond=0;
2847: my $courseprivid='';
2848:
2849: # Course
2850:
2851: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
2852: $thisallowed.=$1;
2853: }
2854:
2855: # Domain
2856:
2857: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2858: =~/\Q$priv\E\&([^\:]*)/) {
2859: $thisallowed.=$1;
2860: }
2861:
2862: # Course: uri itself is a course
2863: my $courseuri=$uri;
2864: $courseuri=~s/\_(\d)/\/$1/;
2865: $courseuri=~s/^([^\/])/\/$1/;
2866:
2867: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2868: =~/\Q$priv\E\&([^\:]*)/) {
2869: $thisallowed.=$1;
2870: }
2871:
2872: # URI is an uploaded document for this course
2873:
2874: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
2875: my $refuri=$ENV{'httpref.'.$orguri};
2876: if ($refuri) {
2877: if ($refuri =~ m|^/adm/|) {
2878: $thisallowed='F';
2879: }
2880: }
2881: }
2882:
2883: # Full access at system, domain or course-wide level? Exit.
2884:
2885: if ($thisallowed=~/F/) {
2886: return 'F';
2887: }
2888:
2889: # If this is generating or modifying users, exit with special codes
2890:
2891: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:\Q$priv\E\:/) {
2892: return $thisallowed;
2893: }
2894: #
2895: # Gathered so far: system, domain and course wide privileges
2896: #
2897: # Course: See if uri or referer is an individual resource that is part of
2898: # the course
2899:
2900: if ($ENV{'request.course.id'}) {
2901:
2902: $courseprivid=$ENV{'request.course.id'};
2903: if ($ENV{'request.course.sec'}) {
2904: $courseprivid.='/'.$ENV{'request.course.sec'};
2905: }
2906: $courseprivid=~s/\_/\//;
2907: my $checkreferer=1;
2908: my ($match,$cond)=&is_on_map($uri);
2909: if ($match) {
2910: $statecond=$cond;
2911: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2912: =~/\Q$priv\E\&([^\:]*)/) {
2913: $thisallowed.=$1;
2914: $checkreferer=0;
2915: }
2916: }
2917:
2918: if ($checkreferer) {
2919: my $refuri=$ENV{'httpref.'.$orguri};
2920: unless ($refuri) {
2921: foreach (keys %ENV) {
2922: if ($_=~/^httpref\..*\*/) {
2923: my $pattern=$_;
2924: $pattern=~s/^httpref\.\/res\///;
2925: $pattern=~s/\*/\[\^\/\]\+/g;
2926: $pattern=~s/\//\\\//g;
2927: if ($orguri=~/$pattern/) {
2928: $refuri=$ENV{$_};
2929: }
2930: }
2931: }
2932: }
2933:
2934: if ($refuri) {
2935: $refuri=&declutter($refuri);
2936: my ($match,$cond)=&is_on_map($refuri);
2937: if ($match) {
2938: my $refstatecond=$cond;
2939: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2940: =~/\Q$priv\E\&([^\:]*)/) {
2941: $thisallowed.=$1;
2942: $uri=$refuri;
2943: $statecond=$refstatecond;
2944: }
2945: }
2946: }
2947: }
2948: }
2949:
2950: #
2951: # Gathered now: all privileges that could apply, and condition number
2952: #
2953: #
2954: # Full or no access?
2955: #
2956:
2957: if ($thisallowed=~/F/) {
2958: return 'F';
2959: }
2960:
2961: unless ($thisallowed) {
2962: return '';
2963: }
2964:
2965: # Restrictions exist, deal with them
2966: #
2967: # C:according to course preferences
2968: # R:according to resource settings
2969: # L:unless locked
2970: # X:according to user session state
2971: #
2972:
2973: # Possibly locked functionality, check all courses
2974: # Locks might take effect only after 10 minutes cache expiration for other
2975: # courses, and 2 minutes for current course
2976:
2977: my $envkey;
2978: if ($thisallowed=~/L/) {
2979: foreach $envkey (keys %ENV) {
2980: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2981: my $courseid=$2;
2982: my $roleid=$1.'.'.$2;
2983: $courseid=~s/^\///;
2984: my $expiretime=600;
2985: if ($ENV{'request.role'} eq $roleid) {
2986: $expiretime=120;
2987: }
2988: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2989: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2990: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2991: &coursedescription($courseid);
2992: }
2993: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
2994: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2995: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2996: &log($ENV{'user.domain'},$ENV{'user.name'},
2997: $ENV{'user.home'},
2998: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2999: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3000: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
3001: return '';
3002: }
3003: }
3004: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3005: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3006: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
3007: &log($ENV{'user.domain'},$ENV{'user.name'},
3008: $ENV{'user.home'},
3009: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3010: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3011: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
3012: return '';
3013: }
3014: }
3015: }
3016: }
3017: }
3018:
3019: #
3020: # Rest of the restrictions depend on selected course
3021: #
3022:
3023: unless ($ENV{'request.course.id'}) {
3024: return '1';
3025: }
3026:
3027: #
3028: # Now user is definitely in a course
3029: #
3030:
3031:
3032: # Course preferences
3033:
3034: if ($thisallowed=~/C/) {
3035: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
3036: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
3037: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
3038: =~/\Q$rolecode\E/) {
3039: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
3040: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3041: $ENV{'request.course.id'});
3042: return '';
3043: }
3044:
3045: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
3046: =~/\Q$unamedom\E/) {
3047: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
3048: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3049: $ENV{'request.course.id'});
3050: return '';
3051: }
3052: }
3053:
3054: # Resource preferences
3055:
3056: if ($thisallowed=~/R/) {
3057: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
3058: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3059: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
3060: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3061: return '';
3062: }
3063: }
3064:
3065: # Restricted by state or randomout?
3066:
3067: if ($thisallowed=~/X/) {
3068: if ($ENV{'acc.randomout'}) {
3069: if (!$symb) { $symb=&symbread($uri,1); }
3070: if (($symb) && ($ENV{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3071: return '';
3072: }
3073: }
3074: if (&condval($statecond)) {
3075: return '2';
3076: } else {
3077: return '';
3078: }
3079: }
3080:
3081: return 'F';
3082: }
3083:
3084: # --------------------------------------------------- Is a resource on the map?
3085:
3086: sub is_on_map {
3087: my $uri=&declutter(shift);
3088: $uri=~s/\.\d+\.(\w+)$/\.$1/;
3089: my @uriparts=split(/\//,$uri);
3090: my $filename=$uriparts[$#uriparts];
3091: my $pathname=$uri;
3092: $pathname=~s|/\Q$filename\E$||;
3093: $pathname=~s/^adm\/wrapper\///;
3094: #Trying to find the conditional for the file
3095: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
3096: /\&\Q$filename\E\:([\d\|]+)\&/);
3097: if ($match) {
3098: return (1,$1);
3099: } else {
3100: return (0,0);
3101: }
3102: }
3103:
3104: # --------------------------------------------------------- Get symb from alias
3105:
3106: sub get_symb_from_alias {
3107: my $symb=shift;
3108: my ($map,$resid,$url)=&decode_symb($symb);
3109: # Already is a symb
3110: if ($url) { return $symb; }
3111: # Must be an alias
3112: my $aliassymb='';
3113: my %bighash;
3114: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3115: &GDBM_READER(),0640)) {
3116: my $rid=$bighash{'mapalias_'.$symb};
3117: if ($rid) {
3118: my ($mapid,$resid)=split(/\./,$rid);
3119: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3120: $resid,$bighash{'src_'.$rid});
3121: }
3122: untie %bighash;
3123: }
3124: return $aliassymb;
3125: }
3126:
3127: # ----------------------------------------------------------------- Define Role
3128:
3129: sub definerole {
3130: if (allowed('mcr','/')) {
3131: my ($rolename,$sysrole,$domrole,$courole)=@_;
3132: foreach (split(':',$sysrole)) {
3133: my ($crole,$cqual)=split(/\&/,$_);
3134: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3135: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3136: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3137: return "refused:s:$crole&$cqual";
3138: }
3139: }
3140: }
3141: foreach (split(':',$domrole)) {
3142: my ($crole,$cqual)=split(/\&/,$_);
3143: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3144: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3145: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3146: return "refused:d:$crole&$cqual";
3147: }
3148: }
3149: }
3150: foreach (split(':',$courole)) {
3151: my ($crole,$cqual)=split(/\&/,$_);
3152: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3153: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3154: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3155: return "refused:c:$crole&$cqual";
3156: }
3157: }
3158: }
3159: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3160: "$ENV{'user.domain'}:$ENV{'user.name'}:".
3161: "rolesdef_$rolename=".
3162: escape($sysrole.'_'.$domrole.'_'.$courole);
3163: return reply($command,$ENV{'user.home'});
3164: } else {
3165: return 'refused';
3166: }
3167: }
3168:
3169: # ---------------- Make a metadata query against the network of library servers
3170:
3171: sub metadata_query {
3172: my ($query,$custom,$customshow,$server_array)=@_;
3173: my %rhash;
3174: my @server_list = (defined($server_array) ? @$server_array
3175: : keys(%libserv) );
3176: for my $server (@server_list) {
3177: unless ($custom or $customshow) {
3178: my $reply=&reply("querysend:".&escape($query),$server);
3179: $rhash{$server}=$reply;
3180: }
3181: else {
3182: my $reply=&reply("querysend:".&escape($query).':'.
3183: &escape($custom).':'.&escape($customshow),
3184: $server);
3185: $rhash{$server}=$reply;
3186: }
3187: }
3188: return \%rhash;
3189: }
3190:
3191: # ----------------------------------------- Send log queries and wait for reply
3192:
3193: sub log_query {
3194: my ($uname,$udom,$query,%filters)=@_;
3195: my $uhome=&homeserver($uname,$udom);
3196: if ($uhome eq 'no_host') { return 'error: no_host'; }
3197: my $uhost=$hostname{$uhome};
3198: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3199: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3200: $uhome);
3201: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3202: return get_query_reply($queryid);
3203: }
3204:
3205: # ------- Request retrieval of institutional classlists for course(s)
3206:
3207: sub fetch_enrollment_query {
3208: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3209: my $homeserver;
3210: my $maxtries = 1;
3211: if ($context eq 'automated') {
3212: $homeserver = $perlvar{'lonHostID'};
3213: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3214: } else {
3215: $homeserver = &homeserver($cnum,$dom);
3216: }
3217: my $host=$hostname{$homeserver};
3218: my $cmd = '';
3219: foreach (keys %{$affiliatesref}) {
3220: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3221: }
3222: $cmd =~ s/%%$//;
3223: $cmd = &escape($cmd);
3224: my $query = 'fetchenrollment';
3225: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$ENV{'user.name'}.':'.$cmd,$homeserver);
3226: unless ($queryid=~/^\Q$host\E\_/) {
3227: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3228: return 'error: '.$queryid;
3229: }
3230: my $reply = &get_query_reply($queryid);
3231: my $tries = 1;
3232: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3233: $reply = &get_query_reply($queryid);
3234: $tries ++;
3235: }
3236: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3237: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$ENV{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3238: } else {
3239: my @responses = split/:/,$reply;
3240: if ($homeserver eq $perlvar{'lonHostID'}) {
3241: foreach (@responses) {
3242: my ($key,$value) = split/=/,$_;
3243: $$replyref{$key} = $value;
3244: }
3245: } else {
3246: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3247: foreach (@responses) {
3248: my ($key,$value) = split/=/,$_;
3249: $$replyref{$key} = $value;
3250: if ($value > 0) {
3251: foreach (@{$$affiliatesref{$key}}) {
3252: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3253: my $destname = $pathname.'/'.$filename;
3254: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3255: if ($xml_classlist =~ /^error/) {
3256: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3257: } else {
3258: if ( open(FILE,">$destname") ) {
3259: print FILE &unescape($xml_classlist);
3260: close(FILE);
3261: } else {
3262: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3263: }
3264: }
3265: }
3266: }
3267: }
3268: }
3269: return 'ok';
3270: }
3271: return 'error';
3272: }
3273:
3274: sub get_query_reply {
3275: my $queryid=shift;
3276: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3277: my $reply='';
3278: for (1..100) {
3279: sleep 2;
3280: if (-e $replyfile.'.end') {
3281: if (open(my $fh,$replyfile)) {
3282: $reply.=<$fh>;
3283: close($fh);
3284: } else { return 'error: reply_file_error'; }
3285: return &unescape($reply);
3286: }
3287: }
3288: return 'timeout:'.$queryid;
3289: }
3290:
3291: sub courselog_query {
3292: #
3293: # possible filters:
3294: # url: url or symb
3295: # username
3296: # domain
3297: # action: view, submit, grade
3298: # start: timestamp
3299: # end: timestamp
3300: #
3301: my (%filters)=@_;
3302: unless ($ENV{'request.course.id'}) { return 'no_course'; }
3303: if ($filters{'url'}) {
3304: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3305: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3306: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3307: }
3308: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
3309: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
3310: return &log_query($cname,$cdom,'courselog',%filters);
3311: }
3312:
3313: sub userlog_query {
3314: my ($uname,$udom,%filters)=@_;
3315: return &log_query($uname,$udom,'userlog',%filters);
3316: }
3317:
3318: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3319:
3320: sub auto_run {
3321: my ($cnum,$cdom) = @_;
3322: my $homeserver = &homeserver($cnum,$cdom);
3323: my $response = &reply('autorun:'.$cdom,$homeserver);
3324: return $response;
3325: }
3326:
3327: sub auto_get_sections {
3328: my ($cnum,$cdom,$inst_coursecode) = @_;
3329: my $homeserver = &homeserver($cnum,$cdom);
3330: my @secs = ();
3331: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3332: unless ($response eq 'refused') {
3333: @secs = split/:/,$response;
3334: }
3335: return @secs;
3336: }
3337:
3338: sub auto_new_course {
3339: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3340: my $homeserver = &homeserver($cnum,$cdom);
3341: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3342: return $response;
3343: }
3344:
3345: sub auto_validate_courseID {
3346: my ($cnum,$cdom,$inst_course_id) = @_;
3347: my $homeserver = &homeserver($cnum,$cdom);
3348: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3349: return $response;
3350: }
3351:
3352: sub auto_create_password {
3353: my ($cnum,$cdom,$authparam) = @_;
3354: my $homeserver = &homeserver($cnum,$cdom);
3355: my $create_passwd = 0;
3356: my $authchk = '';
3357: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3358: if ($response eq 'refused') {
3359: $authchk = 'refused';
3360: } else {
3361: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3362: }
3363: return ($authparam,$create_passwd,$authchk);
3364: }
3365:
3366: sub auto_instcode_format {
3367: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3368: my $courses = '';
3369: my $homeserver;
3370: if ($caller eq 'global') {
3371: foreach my $tryserver (keys %libserv) {
3372: if ($hostdom{$tryserver} eq $codedom) {
3373: $homeserver = $tryserver;
3374: last;
3375: }
3376: }
3377: if (($ENV{'user.name'}) && ($ENV{'user.domain'} eq $codedom)) {
3378: $homeserver = &homeserver($ENV{'user.name'},$codedom);
3379: }
3380: } else {
3381: $homeserver = &homeserver($caller,$codedom);
3382: }
3383: foreach (keys %{$instcodes}) {
3384: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3385: }
3386: chop($courses);
3387: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3388: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3389: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3390: %{$codes} = &str2hash($codes_str);
3391: @{$codetitles} = &str2array($codetitles_str);
3392: %{$cat_titles} = &str2hash($cat_titles_str);
3393: %{$cat_order} = &str2hash($cat_order_str);
3394: return 'ok';
3395: }
3396: return $response;
3397: }
3398:
3399: # ------------------------------------------------------------------ Plain Text
3400:
3401: sub plaintext {
3402: my $short=shift;
3403: return &mt($prp{$short});
3404: }
3405:
3406: # ----------------------------------------------------------------- Assign Role
3407:
3408: sub assignrole {
3409: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3410: my $mrole;
3411: if ($role =~ /^cr\//) {
3412: my $cwosec=$url;
3413: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3414: unless (&allowed('ccr',$cwosec)) {
3415: &logthis('Refused custom assignrole: '.
3416: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3417: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3418: return 'refused';
3419: }
3420: $mrole='cr';
3421: } else {
3422: my $cwosec=$url;
3423: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3424: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3425: &logthis('Refused assignrole: '.
3426: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3427: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3428: return 'refused';
3429: }
3430: $mrole=$role;
3431: }
3432: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3433: "$udom:$uname:$url".'_'."$mrole=$role";
3434: if ($end) { $command.='_'.$end; }
3435: if ($start) {
3436: if ($end) {
3437: $command.='_'.$start;
3438: } else {
3439: $command.='_0_'.$start;
3440: }
3441: }
3442: # actually delete
3443: if ($deleteflag) {
3444: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3445: # modify command to delete the role
3446: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
3447: "$udom:$uname:$url".'_'."$mrole";
3448: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
3449: # set start and finish to negative values for userrolelog
3450: $start=-1;
3451: $end=-1;
3452: }
3453: }
3454: # send command
3455: my $answer=&reply($command,&homeserver($uname,$udom));
3456: # log new user role if status is ok
3457: if ($answer eq 'ok') {
3458: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
3459: }
3460: return $answer;
3461: }
3462:
3463: # -------------------------------------------------- Modify user authentication
3464: # Overrides without validation
3465:
3466: sub modifyuserauth {
3467: my ($udom,$uname,$umode,$upass)=@_;
3468: my $uhome=&homeserver($uname,$udom);
3469: unless (&allowed('mau',$udom)) { return 'refused'; }
3470: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3471: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3472: ' in domain '.$ENV{'request.role.domain'});
3473: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3474: &escape($upass),$uhome);
3475: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
3476: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3477: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3478: &log($udom,,$uname,$uhome,
3479: 'Authentication changed by '.$ENV{'user.domain'}.', '.
3480: $ENV{'user.name'}.', '.$umode.
3481: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3482: unless ($reply eq 'ok') {
3483: &logthis('Authentication mode error: '.$reply);
3484: return 'error: '.$reply;
3485: }
3486: return 'ok';
3487: }
3488:
3489: # --------------------------------------------------------------- Modify a user
3490:
3491: sub modifyuser {
3492: my ($udom, $uname, $uid,
3493: $umode, $upass, $first,
3494: $middle, $last, $gene,
3495: $forceid, $desiredhome, $email)=@_;
3496: $udom=~s/\W//g;
3497: $uname=~s/\W//g;
3498: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3499: $umode.', '.$first.', '.$middle.', '.
3500: $last.', '.$gene.'(forceid: '.$forceid.')'.
3501: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3502: ' desiredhome not specified').
3503: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3504: ' in domain '.$ENV{'request.role.domain'});
3505: my $uhome=&homeserver($uname,$udom,'true');
3506: # ----------------------------------------------------------------- Create User
3507: if (($uhome eq 'no_host') &&
3508: (($umode && $upass) || ($umode eq 'localauth'))) {
3509: my $unhome='';
3510: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3511: $unhome = $desiredhome;
3512: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
3513: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
3514: } else { # load balancing routine for determining $unhome
3515: my $tryserver;
3516: my $loadm=10000000;
3517: foreach $tryserver (keys %libserv) {
3518: if ($hostdom{$tryserver} eq $udom) {
3519: my $answer=reply('load',$tryserver);
3520: if (($answer=~/\d+/) && ($answer<$loadm)) {
3521: $loadm=$answer;
3522: $unhome=$tryserver;
3523: }
3524: }
3525: }
3526: }
3527: if (($unhome eq '') || ($unhome eq 'no_host')) {
3528: return 'error: unable to find a home server for '.$uname.
3529: ' in domain '.$udom;
3530: }
3531: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3532: &escape($upass),$unhome);
3533: unless ($reply eq 'ok') {
3534: return 'error: '.$reply;
3535: }
3536: $uhome=&homeserver($uname,$udom,'true');
3537: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3538: return 'error: unable verify users home machine.';
3539: }
3540: } # End of creation of new user
3541: # ---------------------------------------------------------------------- Add ID
3542: if ($uid) {
3543: $uid=~tr/A-Z/a-z/;
3544: my %uidhash=&idrget($udom,$uname);
3545: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3546: && (!$forceid)) {
3547: unless ($uid eq $uidhash{$uname}) {
3548: return 'error: user id "'.$uid.'" does not match '.
3549: 'current user id "'.$uidhash{$uname}.'".';
3550: }
3551: } else {
3552: &idput($udom,($uname => $uid));
3553: }
3554: }
3555: # -------------------------------------------------------------- Add names, etc
3556: my @tmp=&get('environment',
3557: ['firstname','middlename','lastname','generation'],
3558: $udom,$uname);
3559: my %names;
3560: if ($tmp[0] =~ m/^error:.*/) {
3561: %names=();
3562: } else {
3563: %names = @tmp;
3564: }
3565: #
3566: # Make sure to not trash student environment if instructor does not bother
3567: # to supply name and email information
3568: #
3569: if ($first) { $names{'firstname'} = $first; }
3570: if (defined($middle)) { $names{'middlename'} = $middle; }
3571: if ($last) { $names{'lastname'} = $last; }
3572: if (defined($gene)) { $names{'generation'} = $gene; }
3573: if ($email) { $names{'notification'} = $email;
3574: $names{'critnotification'} = $email; }
3575:
3576: my $reply = &put('environment', \%names, $udom,$uname);
3577: if ($reply ne 'ok') { return 'error: '.$reply; }
3578: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
3579: $umode.', '.$first.', '.$middle.', '.
3580: $last.', '.$gene.' by '.
3581: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3582: return 'ok';
3583: }
3584:
3585: # -------------------------------------------------------------- Modify student
3586:
3587: sub modifystudent {
3588: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3589: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
3590: if (!$cid) {
3591: unless ($cid=$ENV{'request.course.id'}) {
3592: return 'not_in_class';
3593: }
3594: }
3595: # --------------------------------------------------------------- Make the user
3596: my $reply=&modifyuser
3597: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
3598: $desiredhome,$email);
3599: unless ($reply eq 'ok') { return $reply; }
3600: # This will cause &modify_student_enrollment to get the uid from the
3601: # students environment
3602: $uid = undef if (!$forceid);
3603: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
3604: $gene,$usec,$end,$start,$type,$locktype,$cid);
3605: return $reply;
3606: }
3607:
3608: sub modify_student_enrollment {
3609: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
3610: my ($cdom,$cnum,$chome);
3611: if (!$cid) {
3612: unless ($cid=$ENV{'request.course.id'}) {
3613: return 'not_in_class';
3614: }
3615: $cdom=$ENV{'course.'.$cid.'.domain'};
3616: $cnum=$ENV{'course.'.$cid.'.num'};
3617: } else {
3618: ($cdom,$cnum)=split(/_/,$cid);
3619: }
3620: $chome=$ENV{'course.'.$cid.'.home'};
3621: if (!$chome) {
3622: $chome=&homeserver($cnum,$cdom);
3623: }
3624: if (!$chome) { return 'unknown_course'; }
3625: # Make sure the user exists
3626: my $uhome=&homeserver($uname,$udom);
3627: if (($uhome eq '') || ($uhome eq 'no_host')) {
3628: return 'error: no such user';
3629: }
3630: # Get student data if we were not given enough information
3631: if (!defined($first) || $first eq '' ||
3632: !defined($last) || $last eq '' ||
3633: !defined($uid) || $uid eq '' ||
3634: !defined($middle) || $middle eq '' ||
3635: !defined($gene) || $gene eq '') {
3636: # They did not supply us with enough data to enroll the student, so
3637: # we need to pick up more information.
3638: my %tmp = &get('environment',
3639: ['firstname','middlename','lastname', 'generation','id']
3640: ,$udom,$uname);
3641:
3642: #foreach (keys(%tmp)) {
3643: # &logthis("key $_ = ".$tmp{$_});
3644: #}
3645: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3646: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3647: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3648: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3649: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3650: }
3651: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
3652: my $reply=cput('classlist',
3653: {"$uname:$udom" =>
3654: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
3655: $cdom,$cnum);
3656: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3657: return 'error: '.$reply;
3658: }
3659: # Add student role to user
3660: my $uurl='/'.$cid;
3661: $uurl=~s/\_/\//g;
3662: if ($usec) {
3663: $uurl.='/'.$usec;
3664: }
3665: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3666: }
3667:
3668: sub format_name {
3669: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
3670: my $name;
3671: if ($first ne 'lastname') {
3672: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
3673: } else {
3674: if ($lastname=~/\S/) {
3675: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
3676: $name=~s/\s+,/,/;
3677: } else {
3678: $name.= $firstname.' '.$middlename.' '.$generation;
3679: }
3680: }
3681: $name=~s/^\s+//;
3682: $name=~s/\s+$//;
3683: $name=~s/\s+/ /g;
3684: return $name;
3685: }
3686:
3687: # ------------------------------------------------- Write to course preferences
3688:
3689: sub writecoursepref {
3690: my ($courseid,%prefs)=@_;
3691: $courseid=~s/^\///;
3692: $courseid=~s/\_/\//g;
3693: my ($cdomain,$cnum)=split(/\//,$courseid);
3694: my $chome=homeserver($cnum,$cdomain);
3695: if (($chome eq '') || ($chome eq 'no_host')) {
3696: return 'error: no such course';
3697: }
3698: my $cstring='';
3699: foreach (keys %prefs) {
3700: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3701: }
3702: $cstring=~s/\&$//;
3703: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3704: }
3705:
3706: # ---------------------------------------------------------- Make/modify course
3707:
3708: sub createcourse {
3709: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_;
3710: $url=&declutter($url);
3711: my $cid='';
3712: unless (&allowed('ccc',$udom)) {
3713: return 'refused';
3714: }
3715: # ------------------------------------------------------------------- Create ID
3716: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3717: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3718: # ----------------------------------------------- Make sure that does not exist
3719: my $uhome=&homeserver($uname,$udom,'true');
3720: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3721: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3722: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3723: $uhome=&homeserver($uname,$udom,'true');
3724: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3725: return 'error: unable to generate unique course-ID';
3726: }
3727: }
3728: # ------------------------------------------------ Check supplied server name
3729: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3730: if (! exists($libserv{$course_server})) {
3731: return 'error:bad server name '.$course_server;
3732: }
3733: # ------------------------------------------------------------- Make the course
3734: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3735: $course_server);
3736: unless ($reply eq 'ok') { return 'error: '.$reply; }
3737: $uhome=&homeserver($uname,$udom,'true');
3738: if (($uhome eq '') || ($uhome eq 'no_host')) {
3739: return 'error: no such course';
3740: }
3741: # ----------------------------------------------------------------- Course made
3742: # log existence
3743: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
3744: ':'.&escape($inst_code).':'.&escape($course_owner),$uhome);
3745: &flushcourselogs();
3746: # set toplevel url
3747: my $topurl=$url;
3748: unless ($nonstandard) {
3749: # ------------------------------------------ For standard courses, make top url
3750: my $mapurl=&clutter($url);
3751: if ($mapurl eq '/res/') { $mapurl=''; }
3752: $ENV{'form.initmap'}=(<<ENDINITMAP);
3753: <map>
3754: <resource id="1" type="start"></resource>
3755: <resource id="2" src="$mapurl"></resource>
3756: <resource id="3" type="finish"></resource>
3757: <link index="1" from="1" to="2"></link>
3758: <link index="2" from="2" to="3"></link>
3759: </map>
3760: ENDINITMAP
3761: $topurl=&declutter(
3762: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3763: );
3764: }
3765: # ----------------------------------------------------------- Write preferences
3766: &writecoursepref($udom.'_'.$uname,
3767: ('description' => $description,
3768: 'url' => $topurl));
3769: return '/'.$udom.'/'.$uname;
3770: }
3771:
3772: # ---------------------------------------------------------- Assign Custom Role
3773:
3774: sub assigncustomrole {
3775: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3776: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3777: $end,$start,$deleteflag);
3778: }
3779:
3780: # ----------------------------------------------------------------- Revoke Role
3781:
3782: sub revokerole {
3783: my ($udom,$uname,$url,$role,$deleteflag)=@_;
3784: my $now=time;
3785: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
3786: }
3787:
3788: # ---------------------------------------------------------- Revoke Custom Role
3789:
3790: sub revokecustomrole {
3791: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
3792: my $now=time;
3793: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3794: $deleteflag);
3795: }
3796:
3797: # ------------------------------------------------------------ Disk usage
3798: sub diskusage {
3799: my ($udom,$uname,$directoryRoot)=@_;
3800: $directoryRoot =~ s/\/$//;
3801: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
3802: return $listing;
3803: }
3804:
3805: sub is_locked {
3806: my ($file_name, $domain, $user) = @_;
3807: my @check;
3808: my $is_locked;
3809: push @check, $file_name;
3810: my %locked = &Apache::lonnet::get('file_permissions',\@check,
3811: $ENV{'user.domain'},$ENV{'user.name'});
3812: if (ref($locked{$file_name}) eq 'ARRAY') {
3813: $is_locked = 'true';
3814: } else {
3815: $is_locked = 'false';
3816: }
3817: }
3818:
3819: # ------------------------------------------------------------- Mark as Read Only
3820:
3821: sub mark_as_readonly {
3822: my ($domain,$user,$files,$what) = @_;
3823: my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
3824: foreach my $file (@{$files}) {
3825: push(@{$current_permissions{$file}},$what);
3826: }
3827: &Apache::lonnet::put('file_permissions',\%current_permissions,$domain,$user);
3828: return;
3829: }
3830:
3831: # ------------------------------------------------------------Save Selected Files
3832:
3833: sub save_selected_files {
3834: my ($user, $path, @files) = @_;
3835: my $filename = $user."savedfiles";
3836: my @other_files = &files_not_in_path($user, $path);
3837: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3838: foreach my $file (@files) {
3839: print (OUT $ENV{'form.currentpath'}.$file."\n");
3840: }
3841: foreach my $file (@other_files) {
3842: print (OUT $file."\n");
3843: }
3844: close (OUT);
3845: return 'ok';
3846: }
3847:
3848: sub clear_selected_files {
3849: my ($user) = @_;
3850: my $filename = $user."savedfiles";
3851: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3852: print (OUT undef);
3853: close (OUT);
3854: return ("ok");
3855: }
3856:
3857: sub files_in_path {
3858: my ($user, $path) = @_;
3859: my $filename = $user."savedfiles";
3860: my %return_files;
3861: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3862: while (my $line_in = <IN>) {
3863: chomp ($line_in);
3864: my @paths_and_file = split (m!/!, $line_in);
3865: my $file_part = pop (@paths_and_file);
3866: my $path_part = join ('/', @paths_and_file);
3867: $path_part.='/';
3868: my $path_and_file = $path_part.$file_part;
3869: if ($path_part eq $path) {
3870: $return_files{$file_part}= 'selected';
3871: }
3872: }
3873: close (IN);
3874: return (\%return_files);
3875: }
3876:
3877: # called in portfolio select mode, to show files selected NOT in current directory
3878: sub files_not_in_path {
3879: my ($user, $path) = @_;
3880: my $filename = $user."savedfiles";
3881: my @return_files;
3882: my $path_part;
3883: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3884: while (<IN>) {
3885: #ok, I know it's clunky, but I want it to work
3886: my @paths_and_file = split m!/!, $_;
3887: my $file_part = pop (@paths_and_file);
3888: chomp ($file_part);
3889: my $path_part = join ('/', @paths_and_file);
3890: $path_part .= '/';
3891: my $path_and_file = $path_part.$file_part;
3892: if ($path_part ne $path) {
3893: push (@return_files, ($path_and_file));
3894: }
3895: }
3896: close (OUT);
3897: return (@return_files);
3898: }
3899:
3900: #--------------------------------------------------------------Get Marked as Read Only
3901:
3902: sub get_marked_as_readonly {
3903: my ($domain,$user,$what) = @_;
3904: my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
3905: my @readonly_files;
3906: while (my ($file_name,$value) = each(%current_permissions)) {
3907: if (ref($value) eq "ARRAY"){
3908: foreach my $stored_what (@{$value}) {
3909: if ($stored_what eq $what) {
3910: push(@readonly_files, $file_name);
3911: } elsif (!defined($what)) {
3912: push(@readonly_files, $file_name);
3913: }
3914: }
3915: }
3916: }
3917: return @readonly_files;
3918: }
3919: #-----------------------------------------------------------Get Marked as Read Only Hash
3920:
3921: sub get_marked_as_readonly_hash {
3922: my ($domain,$user,$what) = @_;
3923: my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
3924: my %readonly_files;
3925: while (my ($file_name,$value) = each(%current_permissions)) {
3926: if (ref($value) eq "ARRAY"){
3927: foreach my $stored_what (@{$value}) {
3928: if ($stored_what eq $what) {
3929: $readonly_files{$file_name} = 'locked';
3930: } elsif (!defined($what)) {
3931: $readonly_files{$file_name} = 'locked';
3932: }
3933: }
3934: }
3935: }
3936: return %readonly_files;
3937: }
3938: # ------------------------------------------------------------ Unmark as Read Only
3939:
3940: sub unmark_as_readonly {
3941: # unmarks all files locked by $what
3942: # for portfolio submissions, $what contains $crsid and $symb
3943: my ($domain,$user,$what) = @_;
3944: my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
3945: my @readonly_files = &Apache::lonnet::get_marked_as_readonly($domain,$user,$what);
3946: foreach my $file(@readonly_files){
3947: my $current_locks = $current_permissions{$file};
3948: my @new_locks;
3949: my @del_keys;
3950: if (ref($current_locks) eq "ARRAY"){
3951: foreach my $locker (@{$current_locks}) {
3952: unless ($locker eq $what) {
3953: push(@new_locks, $what);
3954: }
3955: }
3956: if (@new_locks > 0) {
3957: $current_permissions{$file} = \@new_locks;
3958: } else {
3959: push(@del_keys, $file);
3960: &Apache::lonnet::del('file_permissions',\@del_keys, $domain, $user);
3961: delete $current_permissions{$file};
3962: }
3963: }
3964: }
3965: &Apache::lonnet::put('file_permissions',\%current_permissions,$domain,$user);
3966: return;
3967: }
3968:
3969: # ------------------------------------------------------------ Directory lister
3970:
3971: sub dirlist {
3972: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3973:
3974: $uri=~s/^\///;
3975: $uri=~s/\/$//;
3976: my ($udom, $uname);
3977: (undef,$udom,$uname)=split(/\//,$uri);
3978: if(defined($userdomain)) {
3979: $udom = $userdomain;
3980: }
3981: if(defined($username)) {
3982: $uname = $username;
3983: }
3984:
3985: my $dirRoot = $perlvar{'lonDocRoot'};
3986: if(defined($alternateDirectoryRoot)) {
3987: $dirRoot = $alternateDirectoryRoot;
3988: $dirRoot =~ s/\/$//;
3989: }
3990:
3991: if($udom) {
3992: if($uname) {
3993: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
3994: homeserver($uname,$udom));
3995: return split(/:/,$listing);
3996: } elsif(!defined($alternateDirectoryRoot)) {
3997: my $tryserver;
3998: my %allusers=();
3999: foreach $tryserver (keys %libserv) {
4000: if($hostdom{$tryserver} eq $udom) {
4001: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
4002: $udom, $tryserver);
4003: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
4004: && ($listing ne 'con_lost')) {
4005: foreach (split(/:/,$listing)) {
4006: my ($entry,@stat)=split(/&/,$_);
4007: $allusers{$entry}=1;
4008: }
4009: }
4010: }
4011: }
4012: my $alluserstr='';
4013: foreach (sort keys %allusers) {
4014: $alluserstr.=$_.'&user:';
4015: }
4016: $alluserstr=~s/:$//;
4017: return split(/:/,$alluserstr);
4018: } else {
4019: my @emptyResults = ();
4020: push(@emptyResults, 'missing user name');
4021: return split(':',@emptyResults);
4022: }
4023: } elsif(!defined($alternateDirectoryRoot)) {
4024: my $tryserver;
4025: my %alldom=();
4026: foreach $tryserver (keys %libserv) {
4027: $alldom{$hostdom{$tryserver}}=1;
4028: }
4029: my $alldomstr='';
4030: foreach (sort keys %alldom) {
4031: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
4032: }
4033: $alldomstr=~s/:$//;
4034: return split(/:/,$alldomstr);
4035: } else {
4036: my @emptyResults = ();
4037: push(@emptyResults, 'missing domain');
4038: return split(':',@emptyResults);
4039: }
4040: }
4041:
4042: # --------------------------------------------- GetFileTimestamp
4043: # This function utilizes dirlist and returns the date stamp for
4044: # when it was last modified. It will also return an error of -1
4045: # if an error occurs
4046:
4047: ##
4048: ## FIXME: This subroutine assumes its caller knows something about the
4049: ## directory structure of the home server for the student ($root).
4050: ## Not a good assumption to make. Since this is for looking up files
4051: ## in user directories, the full path should be constructed by lond, not
4052: ## whatever machine we request data from.
4053: ##
4054: sub GetFileTimestamp {
4055: my ($studentDomain,$studentName,$filename,$root)=@_;
4056: $studentDomain=~s/\W//g;
4057: $studentName=~s/\W//g;
4058: my $subdir=$studentName.'__';
4059: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4060: my $proname="$studentDomain/$subdir/$studentName";
4061: $proname .= '/'.$filename;
4062: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
4063: $studentName, $root);
4064: my @stats = split('&', $fileStat);
4065: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4066: # @stats contains first the filename, then the stat output
4067: return $stats[10]; # so this is 10 instead of 9.
4068: } else {
4069: return -1;
4070: }
4071: }
4072:
4073: # -------------------------------------------------------- Value of a Condition
4074:
4075: sub directcondval {
4076: my $number=shift;
4077: if (!defined($ENV{'user.state.'.$ENV{'request.course.id'}})) {
4078: &Apache::lonuserstate::evalstate();
4079: }
4080: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
4081: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
4082: } else {
4083: return 2;
4084: }
4085: }
4086:
4087: sub condval {
4088: my $condidx=shift;
4089: my $result=0;
4090: my $allpathcond='';
4091: foreach (split(/\|/,$condidx)) {
4092: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
4093: $allpathcond.=
4094: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
4095: }
4096: }
4097: $allpathcond=~s/\|$//;
4098: if ($ENV{'request.course.id'}) {
4099: if ($allpathcond) {
4100: my $operand='|';
4101: my @stack;
4102: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
4103: if ($_ eq '(') {
4104: push @stack,($operand,$result)
4105: } elsif ($_ eq ')') {
4106: my $before=pop @stack;
4107: if (pop @stack eq '&') {
4108: $result=$result>$before?$before:$result;
4109: } else {
4110: $result=$result>$before?$result:$before;
4111: }
4112: } elsif (($_ eq '&') || ($_ eq '|')) {
4113: $operand=$_;
4114: } else {
4115: my $new=directcondval($_);
4116: if ($operand eq '&') {
4117: $result=$result>$new?$new:$result;
4118: } else {
4119: $result=$result>$new?$result:$new;
4120: }
4121: }
4122: }
4123: }
4124: }
4125: return $result;
4126: }
4127:
4128: # ---------------------------------------------------- Devalidate courseresdata
4129:
4130: sub devalidatecourseresdata {
4131: my ($coursenum,$coursedomain)=@_;
4132: my $hashid=$coursenum.':'.$coursedomain;
4133: &devalidate_cache(\%courseresdatacache,$hashid,'courseres');
4134: }
4135:
4136: # --------------------------------------------------- Course Resourcedata Query
4137:
4138: sub courseresdata {
4139: my ($coursenum,$coursedomain,@which)=@_;
4140: my $coursehom=&homeserver($coursenum,$coursedomain);
4141: my $hashid=$coursenum.':'.$coursedomain;
4142: my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid,'courseres');
4143: unless (defined($cached)) {
4144: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
4145: $result=\%dumpreply;
4146: my ($tmp) = keys(%dumpreply);
4147: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
4148: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
4149: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4150: return $tmp;
4151: } elsif ($tmp =~ /^(error)/) {
4152: $result=undef;
4153: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
4154: }
4155: }
4156: foreach my $item (@which) {
4157: if (defined($result->{$item})) {
4158: return $result->{$item};
4159: }
4160: }
4161: return undef;
4162: }
4163:
4164: #
4165: # EXT resource caching routines
4166: #
4167:
4168: sub clear_EXT_cache_status {
4169: &delenv('cache.EXT.');
4170: }
4171:
4172: sub EXT_cache_status {
4173: my ($target_domain,$target_user) = @_;
4174: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4175: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
4176: # We know already the user has no data
4177: return 1;
4178: } else {
4179: return 0;
4180: }
4181: }
4182:
4183: sub EXT_cache_set {
4184: my ($target_domain,$target_user) = @_;
4185: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4186: &appenv($cachename => time);
4187: }
4188:
4189: # --------------------------------------------------------- Value of a Variable
4190: sub EXT {
4191: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
4192:
4193: unless ($varname) { return ''; }
4194: #get real user name/domain, courseid and symb
4195: my $courseid;
4196: my $publicuser;
4197: if ($symbparm) {
4198: $symbparm=&get_symb_from_alias($symbparm);
4199: }
4200: if (!($uname && $udom)) {
4201: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
4202: &Apache::lonxml::whichuser($symbparm);
4203: if (!$symbparm) { $symbparm=$cursymb; }
4204: } else {
4205: $courseid=$ENV{'request.course.id'};
4206: }
4207: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
4208: my $rest;
4209: if (defined($therest[0])) {
4210: $rest=join('.',@therest);
4211: } else {
4212: $rest='';
4213: }
4214:
4215: my $qualifierrest=$qualifier;
4216: if ($rest) { $qualifierrest.='.'.$rest; }
4217: my $spacequalifierrest=$space;
4218: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
4219: if ($realm eq 'user') {
4220: # --------------------------------------------------------------- user.resource
4221: if ($space eq 'resource') {
4222: if (defined($Apache::lonhomework::parsing_a_problem)) {
4223: return $Apache::lonhomework::history{$qualifierrest};
4224: } else {
4225: my %restored;
4226: if ($publicuser || $ENV{'request.state'} eq 'construct') {
4227: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
4228: } else {
4229: %restored=&restore($symbparm,$courseid,$udom,$uname);
4230: }
4231: return $restored{$qualifierrest};
4232: }
4233: # ----------------------------------------------------------------- user.access
4234: } elsif ($space eq 'access') {
4235: # FIXME - not supporting calls for a specific user
4236: return &allowed($qualifier,$rest);
4237: # ------------------------------------------ user.preferences, user.environment
4238: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
4239: if (($uname eq $ENV{'user.name'}) &&
4240: ($udom eq $ENV{'user.domain'})) {
4241: return $ENV{join('.',('environment',$qualifierrest))};
4242: } else {
4243: my %returnhash;
4244: if (!$publicuser) {
4245: %returnhash=&userenvironment($udom,$uname,
4246: $qualifierrest);
4247: }
4248: return $returnhash{$qualifierrest};
4249: }
4250: # ----------------------------------------------------------------- user.course
4251: } elsif ($space eq 'course') {
4252: # FIXME - not supporting calls for a specific user
4253: return $ENV{join('.',('request.course',$qualifier))};
4254: # ------------------------------------------------------------------- user.role
4255: } elsif ($space eq 'role') {
4256: # FIXME - not supporting calls for a specific user
4257: my ($role,$where)=split(/\./,$ENV{'request.role'});
4258: if ($qualifier eq 'value') {
4259: return $role;
4260: } elsif ($qualifier eq 'extent') {
4261: return $where;
4262: }
4263: # ----------------------------------------------------------------- user.domain
4264: } elsif ($space eq 'domain') {
4265: return $udom;
4266: # ------------------------------------------------------------------- user.name
4267: } elsif ($space eq 'name') {
4268: return $uname;
4269: # ---------------------------------------------------- Any other user namespace
4270: } else {
4271: my %reply;
4272: if (!$publicuser) {
4273: %reply=&get($space,[$qualifierrest],$udom,$uname);
4274: }
4275: return $reply{$qualifierrest};
4276: }
4277: } elsif ($realm eq 'query') {
4278: # ---------------------------------------------- pull stuff out of query string
4279: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
4280: [$spacequalifierrest]);
4281: return $ENV{'form.'.$spacequalifierrest};
4282: } elsif ($realm eq 'request') {
4283: # ------------------------------------------------------------- request.browser
4284: if ($space eq 'browser') {
4285: if ($qualifier eq 'textremote') {
4286: if (&mt('textual_remote_display') eq 'on') {
4287: return 1;
4288: } else {
4289: return 0;
4290: }
4291: } else {
4292: return $ENV{'browser.'.$qualifier};
4293: }
4294: # ------------------------------------------------------------ request.filename
4295: } else {
4296: return $ENV{'request.'.$spacequalifierrest};
4297: }
4298: } elsif ($realm eq 'course') {
4299: # ---------------------------------------------------------- course.description
4300: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
4301: } elsif ($realm eq 'resource') {
4302:
4303: my $section;
4304: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
4305: if (!$symbparm) { $symbparm=&symbread(); }
4306: }
4307: if ($symbparm && defined($courseid) &&
4308: $courseid eq $ENV{'request.course.id'}) {
4309:
4310: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
4311:
4312: # ----------------------------------------------------- Cascading lookup scheme
4313: my $symbp=$symbparm;
4314: my $mapp=(&decode_symb($symbp))[0];
4315:
4316: my $symbparm=$symbp.'.'.$spacequalifierrest;
4317: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
4318:
4319: if (($ENV{'user.name'} eq $uname) &&
4320: ($ENV{'user.domain'} eq $udom)) {
4321: $section=$ENV{'request.course.sec'};
4322: } else {
4323: if (! defined($usection)) {
4324: $section=&getsection($udom,$uname,$courseid);
4325: } else {
4326: $section = $usection;
4327: }
4328: }
4329:
4330: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
4331: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
4332: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
4333:
4334: my $courselevel=$courseid.'.'.$spacequalifierrest;
4335: my $courselevelr=$courseid.'.'.$symbparm;
4336: my $courselevelm=$courseid.'.'.$mapparm;
4337:
4338: # ----------------------------------------------------------- first, check user
4339: #most student don\'t have any data set, check if there is some data
4340: if (! &EXT_cache_status($udom,$uname)) {
4341: my $hashid="$udom:$uname";
4342: my ($result,$cached)=&is_cached(\%userresdatacache,$hashid,
4343: 'userres');
4344: if (!defined($cached)) {
4345: my %resourcedata=&dump('resourcedata',$udom,$uname);
4346: $result=\%resourcedata;
4347: &do_cache(\%userresdatacache,$hashid,$result,'userres');
4348: }
4349: my ($tmp)=keys(%$result);
4350: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4351: if ($$result{$courselevelr}) {
4352: return $$result{$courselevelr}; }
4353: if ($$result{$courselevelm}) {
4354: return $$result{$courselevelm}; }
4355: if ($$result{$courselevel}) {
4356: return $$result{$courselevel}; }
4357: } else {
4358: #error 2 occurs when the .db doesn't exist
4359: if ($tmp!~/error: 2 /) {
4360: &logthis("<font color=blue>WARNING:".
4361: " Trying to get resource data for ".
4362: $uname." at ".$udom.": ".
4363: $tmp."</font>");
4364: } elsif ($tmp=~/error: 2 /) {
4365: &EXT_cache_set($udom,$uname);
4366: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4367: return $tmp;
4368: }
4369: }
4370: }
4371:
4372: # -------------------------------------------------------- second, check course
4373:
4374: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
4375: $ENV{'course.'.$courseid.'.domain'},
4376: ($seclevelr,$seclevelm,$seclevel,
4377: $courselevelr,$courselevelm,
4378: $courselevel));
4379: if (defined($coursereply)) { return $coursereply; }
4380:
4381: # ------------------------------------------------------ third, check map parms
4382: my %parmhash=();
4383: my $thisparm='';
4384: if (tie(%parmhash,'GDBM_File',
4385: $ENV{'request.course.fn'}.'_parms.db',
4386: &GDBM_READER(),0640)) {
4387: $thisparm=$parmhash{$symbparm};
4388: untie(%parmhash);
4389: }
4390: if ($thisparm) { return $thisparm; }
4391: }
4392: # --------------------------------------------- last, look in resource metadata
4393:
4394: $spacequalifierrest=~s/\./\_/;
4395: my $filename;
4396: if (!$symbparm) { $symbparm=&symbread(); }
4397: if ($symbparm) {
4398: $filename=(&decode_symb($symbparm))[2];
4399: } else {
4400: $filename=$ENV{'request.filename'};
4401: }
4402: my $metadata=&metadata($filename,$spacequalifierrest);
4403: if (defined($metadata)) { return $metadata; }
4404: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
4405: if (defined($metadata)) { return $metadata; }
4406:
4407: # ------------------------------------------------------------------ Cascade up
4408: unless ($space eq '0') {
4409: my @parts=split(/_/,$space);
4410: my $id=pop(@parts);
4411: my $part=join('_',@parts);
4412: if ($part eq '') { $part='0'; }
4413: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
4414: $symbparm,$udom,$uname,$section,1);
4415: if (defined($partgeneral)) { return $partgeneral; }
4416: }
4417: if ($recurse) { return undef; }
4418: my $pack_def=&packages_tab_default($filename,$varname);
4419: if (defined($pack_def)) { return $pack_def; }
4420:
4421: # ---------------------------------------------------- Any other user namespace
4422: } elsif ($realm eq 'environment') {
4423: # ----------------------------------------------------------------- environment
4424: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
4425: return $ENV{'environment.'.$spacequalifierrest};
4426: } else {
4427: my %returnhash=&userenvironment($udom,$uname,
4428: $spacequalifierrest);
4429: return $returnhash{$spacequalifierrest};
4430: }
4431: } elsif ($realm eq 'system') {
4432: # ----------------------------------------------------------------- system.time
4433: if ($space eq 'time') {
4434: return time;
4435: }
4436: }
4437: return '';
4438: }
4439:
4440: sub packages_tab_default {
4441: my ($uri,$varname)=@_;
4442: my (undef,$part,$name)=split(/\./,$varname);
4443: my $packages=&metadata($uri,'packages');
4444: foreach my $package (split(/,/,$packages)) {
4445: my ($pack_type,$pack_part)=split(/_/,$package,2);
4446: if (defined($packagetab{"$pack_type&$name&default"})) {
4447: return $packagetab{"$pack_type&$name&default"};
4448: }
4449: if ($pack_type eq 'part') { $pack_part='0'; }
4450: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
4451: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
4452: }
4453: }
4454: return undef;
4455: }
4456:
4457: sub add_prefix_and_part {
4458: my ($prefix,$part)=@_;
4459: my $keyroot;
4460: if (defined($prefix) && $prefix !~ /^__/) {
4461: # prefix that has a part already
4462: $keyroot=$prefix;
4463: } elsif (defined($prefix)) {
4464: # prefix that is missing a part
4465: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
4466: } else {
4467: # no prefix at all
4468: if (defined($part)) { $keyroot='_'.$part; }
4469: }
4470: return $keyroot;
4471: }
4472:
4473: # ---------------------------------------------------------------- Get metadata
4474:
4475: sub metadata {
4476: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
4477: $uri=&declutter($uri);
4478: # if it is a non metadata possible uri return quickly
4479: if (($uri eq '') ||
4480: (($uri =~ m|^/*adm/|) &&
4481: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
4482: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
4483: ($uri =~ m|home/[^/]+/public_html/|)) {
4484: return undef;
4485: }
4486: my $filename=$uri;
4487: $uri=~s/\.meta$//;
4488: #
4489: # Is the metadata already cached?
4490: # Look at timestamp of caching
4491: # Everything is cached by the main uri, libraries are never directly cached
4492: #
4493: if (!defined($liburi)) {
4494: my ($result,$cached)=&is_cached(\%metacache,$uri,'meta');
4495: if (defined($cached)) { return $result->{':'.$what}; }
4496: }
4497: {
4498: #
4499: # Is this a recursive call for a library?
4500: #
4501: if (! exists($metacache{$uri})) {
4502: $metacache{$uri}={};
4503: }
4504: if ($liburi) {
4505: $liburi=&declutter($liburi);
4506: $filename=$liburi;
4507: } else {
4508: &devalidate_cache(\%metacache,$uri,'meta');
4509: }
4510: my %metathesekeys=();
4511: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
4512: my $metastring;
4513: if ($uri !~ m|^uploaded/|) {
4514: my $file=&filelocation('',&clutter($filename));
4515: push(@{$metacache{$uri.'.file'}},$file);
4516: $metastring=&getfile($file);
4517: }
4518: my $parser=HTML::LCParser->new(\$metastring);
4519: my $token;
4520: undef %metathesekeys;
4521: while ($token=$parser->get_token) {
4522: if ($token->[0] eq 'S') {
4523: if (defined($token->[2]->{'package'})) {
4524: #
4525: # This is a package - get package info
4526: #
4527: my $package=$token->[2]->{'package'};
4528: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4529: if (defined($token->[2]->{'id'})) {
4530: $keyroot.='_'.$token->[2]->{'id'};
4531: }
4532: if ($metacache{$uri}->{':packages'}) {
4533: $metacache{$uri}->{':packages'}.=','.$package.$keyroot;
4534: } else {
4535: $metacache{$uri}->{':packages'}=$package.$keyroot;
4536: }
4537: foreach (keys %packagetab) {
4538: my $part=$keyroot;
4539: $part=~s/^\_//;
4540: if ($_=~/^\Q$package\E\&/ ||
4541: $_=~/^\Q$package\E_0\&/) {
4542: my ($pack,$name,$subp)=split(/\&/,$_);
4543: # ignore package.tab specified default values
4544: # here &package_tab_default() will fetch those
4545: if ($subp eq 'default') { next; }
4546: my $value=$packagetab{$_};
4547: my $unikey;
4548: if ($pack =~ /_0$/) {
4549: $unikey='parameter_0_'.$name;
4550: $part=0;
4551: } else {
4552: $unikey='parameter'.$keyroot.'_'.$name;
4553: }
4554: if ($subp eq 'display') {
4555: $value.=' [Part: '.$part.']';
4556: }
4557: $metacache{$uri}->{':'.$unikey.'.part'}=$part;
4558: $metathesekeys{$unikey}=1;
4559: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4560: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
4561: }
4562: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4563: $metacache{$uri}->{':'.$unikey}=
4564: $metacache{$uri}->{':'.$unikey.'.default'};
4565: }
4566: }
4567: }
4568: } else {
4569: #
4570: # This is not a package - some other kind of start tag
4571: #
4572: my $entry=$token->[1];
4573: my $unikey;
4574: if ($entry eq 'import') {
4575: $unikey='';
4576: } else {
4577: $unikey=$entry;
4578: }
4579: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4580:
4581: if (defined($token->[2]->{'id'})) {
4582: $unikey.='_'.$token->[2]->{'id'};
4583: }
4584:
4585: if ($entry eq 'import') {
4586: #
4587: # Importing a library here
4588: #
4589: if ($depthcount<20) {
4590: my $location=$parser->get_text('/import');
4591: my $dir=$filename;
4592: $dir=~s|[^/]*$||;
4593: $location=&filelocation($dir,$location);
4594: foreach (sort(split(/\,/,&metadata($uri,'keys',
4595: $location,$unikey,
4596: $depthcount+1)))) {
4597: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
4598: $metathesekeys{$_}=1;
4599: }
4600: }
4601: } else {
4602:
4603: if (defined($token->[2]->{'name'})) {
4604: $unikey.='_'.$token->[2]->{'name'};
4605: }
4606: $metathesekeys{$unikey}=1;
4607: foreach (@{$token->[3]}) {
4608: $metacache{$uri}->{':'.$unikey.'.'.$_}=$token->[2]->{$_};
4609: }
4610: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
4611: my $default=$metacache{$uri}->{':'.$unikey.'.default'};
4612: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
4613: # only ws inside the tag, and not in default, so use default
4614: # as value
4615: $metacache{$uri}->{':'.$unikey}=$default;
4616: } else {
4617: # either something interesting inside the tag or default
4618: # uninteresting
4619: $metacache{$uri}->{':'.$unikey}=$internaltext;
4620: }
4621: # end of not-a-package not-a-library import
4622: }
4623: # end of not-a-package start tag
4624: }
4625: # the next is the end of "start tag"
4626: }
4627: }
4628: my ($extension) = ($uri =~ /\.(\w+)$/);
4629: foreach my $key (sort(keys(%packagetab))) {
4630: #&logthis("extsion1 $extension $key !!");
4631: #no specific packages #how's our extension
4632: if ($key!~/^extension_\Q$extension\E&/) { next; }
4633: &metadata_create_package_def($uri,$key,'extension_'.$extension,
4634: \%metathesekeys);
4635: }
4636: if (!exists($metacache{$uri}->{':packages'})) {
4637: foreach my $key (sort(keys(%packagetab))) {
4638: #no specific packages well let's get default then
4639: if ($key!~/^default&/) { next; }
4640: &metadata_create_package_def($uri,$key,'default',
4641: \%metathesekeys);
4642: }
4643: }
4644: # are there custom rights to evaluate
4645: if ($metacache{$uri}->{':copyright'} eq 'custom') {
4646:
4647: #
4648: # Importing a rights file here
4649: #
4650: unless ($depthcount) {
4651: my $location=$metacache{$uri}->{':customdistributionfile'};
4652: my $dir=$filename;
4653: $dir=~s|[^/]*$||;
4654: $location=&filelocation($dir,$location);
4655: foreach (sort(split(/\,/,&metadata($uri,'keys',
4656: $location,'_rights',
4657: $depthcount+1)))) {
4658: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
4659: $metathesekeys{$_}=1;
4660: }
4661: }
4662: }
4663: $metacache{$uri}->{':keys'}=join(',',keys %metathesekeys);
4664: &metadata_generate_part0(\%metathesekeys,$metacache{$uri},$uri);
4665: $metacache{$uri}->{':allpossiblekeys'}=join(',',keys %metathesekeys);
4666: &do_cache(\%metacache,$uri,$metacache{$uri},'meta');
4667: # this is the end of "was not already recently cached
4668: }
4669: return $metacache{$uri}->{':'.$what};
4670: }
4671:
4672: sub metadata_create_package_def {
4673: my ($uri,$key,$package,$metathesekeys)=@_;
4674: my ($pack,$name,$subp)=split(/\&/,$key);
4675: if ($subp eq 'default') { next; }
4676:
4677: if (defined($metacache{$uri}->{':packages'})) {
4678: $metacache{$uri}->{':packages'}.=','.$package;
4679: } else {
4680: $metacache{$uri}->{':packages'}=$package;
4681: }
4682: my $value=$packagetab{$key};
4683: my $unikey;
4684: $unikey='parameter_0_'.$name;
4685: $metacache{$uri}->{':'.$unikey.'.part'}=0;
4686: $$metathesekeys{$unikey}=1;
4687: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4688: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
4689: }
4690: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4691: $metacache{$uri}->{':'.$unikey}=
4692: $metacache{$uri}->{':'.$unikey.'.default'};
4693: }
4694: }
4695:
4696: sub metadata_generate_part0 {
4697: my ($metadata,$metacache,$uri) = @_;
4698: my %allnames;
4699: foreach my $metakey (sort keys %$metadata) {
4700: if ($metakey=~/^parameter\_(.*)/) {
4701: my $part=$$metacache{':'.$metakey.'.part'};
4702: my $name=$$metacache{':'.$metakey.'.name'};
4703: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
4704: $allnames{$name}=$part;
4705: }
4706: }
4707: }
4708: foreach my $name (keys(%allnames)) {
4709: $$metadata{"parameter_0_$name"}=1;
4710: my $key=":parameter_0_$name";
4711: $$metacache{"$key.part"}='0';
4712: $$metacache{"$key.name"}=$name;
4713: $$metacache{"$key.type"}=$$metacache{':parameter_'.
4714: $allnames{$name}.'_'.$name.
4715: '.type'};
4716: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
4717: '.display'};
4718: my $expr='\\[Part: '.$allnames{$name}.'\\]';
4719: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
4720: $$metacache{"$key.display"}=$olddis;
4721: }
4722: }
4723:
4724: # ------------------------------------------------- Get the title of a resource
4725:
4726: sub gettitle {
4727: my $urlsymb=shift;
4728: my $symb=&symbread($urlsymb);
4729: if ($symb) {
4730: my ($result,$cached)=&is_cached(\%titlecache,$symb,'title',600);
4731: if (defined($cached)) {
4732: return $result;
4733: }
4734: my ($map,$resid,$url)=&decode_symb($symb);
4735: my $title='';
4736: my %bighash;
4737: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4738: &GDBM_READER(),0640)) {
4739: my $mapid=$bighash{'map_pc_'.&clutter($map)};
4740: $title=$bighash{'title_'.$mapid.'.'.$resid};
4741: untie %bighash;
4742: }
4743: $title=~s/\&colon\;/\:/gs;
4744: if ($title) {
4745: return &do_cache(\%titlecache,$symb,$title,'title');
4746: }
4747: $urlsymb=$url;
4748: }
4749: my $title=&metadata($urlsymb,'title');
4750: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
4751: return $title;
4752: }
4753:
4754: # ------------------------------------------------- Update symbolic store links
4755:
4756: sub symblist {
4757: my ($mapname,%newhash)=@_;
4758: $mapname=&deversion(&declutter($mapname));
4759: my %hash;
4760: if (($ENV{'request.course.fn'}) && (%newhash)) {
4761: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4762: &GDBM_WRCREAT(),0640)) {
4763: foreach (keys %newhash) {
4764: $hash{declutter($_)}=$mapname.'___'.&deversion($newhash{$_});
4765: }
4766: if (untie(%hash)) {
4767: return 'ok';
4768: }
4769: }
4770: }
4771: return 'error';
4772: }
4773:
4774: # --------------------------------------------------------------- Verify a symb
4775:
4776: sub symbverify {
4777: my ($symb,$thisurl)=@_;
4778: my $thisfn=$thisurl;
4779: # wrapper not part of symbs
4780: $thisfn=~s/^\/adm\/wrapper//;
4781: $thisfn=&declutter($thisfn);
4782: # direct jump to resource in page or to a sequence - will construct own symbs
4783: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
4784: # check URL part
4785: my ($map,$resid,$url)=&decode_symb($symb);
4786:
4787: unless ($url eq $thisfn) { return 0; }
4788:
4789: $symb=&symbclean($symb);
4790: $thisurl=&deversion($thisurl);
4791: $thisfn=&deversion($thisfn);
4792:
4793: my %bighash;
4794: my $okay=0;
4795:
4796: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4797: &GDBM_READER(),0640)) {
4798: my $ids=$bighash{'ids_'.&clutter($thisurl)};
4799: unless ($ids) {
4800: $ids=$bighash{'ids_/'.$thisurl};
4801: }
4802: if ($ids) {
4803: # ------------------------------------------------------------------- Has ID(s)
4804: foreach (split(/\,/,$ids)) {
4805: my ($mapid,$resid)=split(/\./,$_);
4806: if (
4807: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
4808: eq $symb) {
4809: if (($ENV{'request.role.adv'}) ||
4810: $bighash{'encrypted_'.$_} eq $ENV{'request.enc'}) {
4811: $okay=1;
4812: }
4813: }
4814: }
4815: }
4816: untie(%bighash);
4817: }
4818: return $okay;
4819: }
4820:
4821: # --------------------------------------------------------------- Clean-up symb
4822:
4823: sub symbclean {
4824: my $symb=shift;
4825: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
4826: # remove version from map
4827: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
4828:
4829: # remove version from URL
4830: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
4831:
4832: # remove wrapper
4833:
4834: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
4835: return $symb;
4836: }
4837:
4838: # ---------------------------------------------- Split symb to find map and url
4839:
4840: sub encode_symb {
4841: my ($map,$resid,$url)=@_;
4842: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
4843: }
4844:
4845: sub decode_symb {
4846: my $symb=shift;
4847: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
4848: my ($map,$resid,$url)=split(/___/,$symb);
4849: return (&fixversion($map),$resid,&fixversion($url));
4850: }
4851:
4852: sub fixversion {
4853: my $fn=shift;
4854: if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
4855: my %bighash;
4856: my $uri=&clutter($fn);
4857: my $key=$ENV{'request.course.id'}.'_'.$uri;
4858: # is this cached?
4859: my ($result,$cached)=&is_cached(\%courseresversioncache,$key,
4860: 'courseresversion',600);
4861: if (defined($cached)) { return $result; }
4862: # unfortunately not cached, or expired
4863: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4864: &GDBM_READER(),0640)) {
4865: if ($bighash{'version_'.$uri}) {
4866: my $version=$bighash{'version_'.$uri};
4867: unless (($version eq 'mostrecent') ||
4868: ($version==&getversion($uri))) {
4869: $uri=~s/\.(\w+)$/\.$version\.$1/;
4870: }
4871: }
4872: untie %bighash;
4873: }
4874: return &do_cache
4875: (\%courseresversioncache,$key,&declutter($uri),'courseresversion');
4876: }
4877:
4878: sub deversion {
4879: my $url=shift;
4880: $url=~s/\.\d+\.(\w+)$/\.$1/;
4881: return $url;
4882: }
4883:
4884: # ------------------------------------------------------ Return symb list entry
4885:
4886: sub symbread {
4887: my ($thisfn,$donotrecurse)=@_;
4888: my $cache_str='request.symbread.cached.'.$thisfn;
4889: if (defined($ENV{$cache_str})) { return $ENV{$cache_str}; }
4890: # no filename provided? try from environment
4891: unless ($thisfn) {
4892: if ($ENV{'request.symb'}) {
4893: return $ENV{$cache_str}=&symbclean($ENV{'request.symb'});
4894: }
4895: $thisfn=$ENV{'request.filename'};
4896: }
4897: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
4898: # is that filename actually a symb? Verify, clean, and return
4899: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
4900: if (&symbverify($thisfn,$1)) {
4901: return $ENV{$cache_str}=&symbclean($thisfn);
4902: }
4903: }
4904: $thisfn=declutter($thisfn);
4905: my %hash;
4906: my %bighash;
4907: my $syval='';
4908: if (($ENV{'request.course.fn'}) && ($thisfn)) {
4909: my $targetfn = $thisfn;
4910: if ( ($thisfn =~ m/^uploaded\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
4911: $targetfn = 'adm/wrapper/'.$thisfn;
4912: }
4913: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4914: &GDBM_READER(),0640)) {
4915: $syval=$hash{$targetfn};
4916: untie(%hash);
4917: }
4918: # ---------------------------------------------------------- There was an entry
4919: if ($syval) {
4920: unless ($syval=~/\_\d+$/) {
4921: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
4922: &appenv('request.ambiguous' => $thisfn);
4923: return $ENV{$cache_str}='';
4924: }
4925: $syval.=$1;
4926: }
4927: } else {
4928: # ------------------------------------------------------- Was not in symb table
4929: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4930: &GDBM_READER(),0640)) {
4931: # ---------------------------------------------- Get ID(s) for current resource
4932: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4933: unless ($ids) {
4934: $ids=$bighash{'ids_/'.$thisfn};
4935: }
4936: unless ($ids) {
4937: # alias?
4938: $ids=$bighash{'mapalias_'.$thisfn};
4939: }
4940: if ($ids) {
4941: # ------------------------------------------------------------------- Has ID(s)
4942: my @possibilities=split(/\,/,$ids);
4943: if ($#possibilities==0) {
4944: # ----------------------------------------------- There is only one possibility
4945: my ($mapid,$resid)=split(/\./,$ids);
4946: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
4947: } elsif (!$donotrecurse) {
4948: # ------------------------------------------ There is more than one possibility
4949: my $realpossible=0;
4950: foreach (@possibilities) {
4951: my $file=$bighash{'src_'.$_};
4952: if (&allowed('bre',$file)) {
4953: my ($mapid,$resid)=split(/\./,$_);
4954: if ($bighash{'map_type_'.$mapid} ne 'page') {
4955: $realpossible++;
4956: $syval=declutter($bighash{'map_id_'.$mapid}).
4957: '___'.$resid;
4958: }
4959: }
4960: }
4961: if ($realpossible!=1) { $syval=''; }
4962: } else {
4963: $syval='';
4964: }
4965: }
4966: untie(%bighash)
4967: }
4968: }
4969: if ($syval) {
4970: return $ENV{$cache_str}=&symbclean($syval.'___'.$thisfn);
4971: }
4972: }
4973: &appenv('request.ambiguous' => $thisfn);
4974: return $ENV{$cache_str}='';
4975: }
4976:
4977: # ---------------------------------------------------------- Return random seed
4978:
4979: sub numval {
4980: my $txt=shift;
4981: $txt=~tr/A-J/0-9/;
4982: $txt=~tr/a-j/0-9/;
4983: $txt=~tr/K-T/0-9/;
4984: $txt=~tr/k-t/0-9/;
4985: $txt=~tr/U-Z/0-5/;
4986: $txt=~tr/u-z/0-5/;
4987: $txt=~s/\D//g;
4988: if ($_64bit) { if ($txt > 2**32) { return -1; } }
4989: return int($txt);
4990: }
4991:
4992: sub numval2 {
4993: my $txt=shift;
4994: $txt=~tr/A-J/0-9/;
4995: $txt=~tr/a-j/0-9/;
4996: $txt=~tr/K-T/0-9/;
4997: $txt=~tr/k-t/0-9/;
4998: $txt=~tr/U-Z/0-5/;
4999: $txt=~tr/u-z/0-5/;
5000: $txt=~s/\D//g;
5001: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5002: my $total;
5003: foreach my $val (@txts) { $total+=$val; }
5004: if ($_64bit) { if ($total > 2**32) { return -1; } }
5005: return int($total);
5006: }
5007:
5008: sub numval3 {
5009: use integer;
5010: my $txt=shift;
5011: $txt=~tr/A-J/0-9/;
5012: $txt=~tr/a-j/0-9/;
5013: $txt=~tr/K-T/0-9/;
5014: $txt=~tr/k-t/0-9/;
5015: $txt=~tr/U-Z/0-5/;
5016: $txt=~tr/u-z/0-5/;
5017: $txt=~s/\D//g;
5018: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5019: my $total;
5020: foreach my $val (@txts) { $total+=$val; }
5021: if ($_64bit) { $total=(($total<<32)>>32); }
5022: return $total;
5023: }
5024:
5025: sub latest_rnd_algorithm_id {
5026: return '64bit4';
5027: }
5028:
5029: sub get_rand_alg {
5030: my ($courseid)=@_;
5031: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
5032: if ($courseid) {
5033: return $ENV{"course.$courseid.rndseed"};
5034: }
5035: return &latest_rnd_algorithm_id();
5036: }
5037:
5038: sub validCODE {
5039: my ($CODE)=@_;
5040: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
5041: return 0;
5042: }
5043:
5044: sub getCODE {
5045: if (&validCODE($ENV{'form.CODE'})) { return $ENV{'form.CODE'}; }
5046: if (defined($Apache::lonhomework::parsing_a_problem) &&
5047: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
5048: return $Apache::lonhomework::history{'resource.CODE'};
5049: }
5050: return undef;
5051: }
5052:
5053: sub rndseed {
5054: my ($symb,$courseid,$domain,$username)=@_;
5055:
5056: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
5057: if (!$symb) {
5058: unless ($symb=$wsymb) { return time; }
5059: }
5060: if (!$courseid) { $courseid=$wcourseid; }
5061: if (!$domain) { $domain=$wdomain; }
5062: if (!$username) { $username=$wusername }
5063: my $which=&get_rand_alg();
5064: if (defined(&getCODE())) {
5065: if ($which eq '64bit4') {
5066: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
5067: } else {
5068: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
5069: }
5070: } elsif ($which eq '64bit4') {
5071: return &rndseed_64bit4($symb,$courseid,$domain,$username);
5072: } elsif ($which eq '64bit3') {
5073: return &rndseed_64bit3($symb,$courseid,$domain,$username);
5074: } elsif ($which eq '64bit2') {
5075: return &rndseed_64bit2($symb,$courseid,$domain,$username);
5076: } elsif ($which eq '64bit') {
5077: return &rndseed_64bit($symb,$courseid,$domain,$username);
5078: }
5079: return &rndseed_32bit($symb,$courseid,$domain,$username);
5080: }
5081:
5082: sub rndseed_32bit {
5083: my ($symb,$courseid,$domain,$username)=@_;
5084: {
5085: use integer;
5086: my $symbchck=unpack("%32C*",$symb) << 27;
5087: my $symbseed=numval($symb) << 22;
5088: my $namechck=unpack("%32C*",$username) << 17;
5089: my $nameseed=numval($username) << 12;
5090: my $domainseed=unpack("%32C*",$domain) << 7;
5091: my $courseseed=unpack("%32C*",$courseid);
5092: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
5093: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5094: #&Apache::lonxml::debug("rndseed :$num:$symb");
5095: if ($_64bit) { $num=(($num<<32)>>32); }
5096: return $num;
5097: }
5098: }
5099:
5100: sub rndseed_64bit {
5101: my ($symb,$courseid,$domain,$username)=@_;
5102: {
5103: use integer;
5104: my $symbchck=unpack("%32S*",$symb) << 21;
5105: my $symbseed=numval($symb) << 10;
5106: my $namechck=unpack("%32S*",$username);
5107:
5108: my $nameseed=numval($username) << 21;
5109: my $domainseed=unpack("%32S*",$domain) << 10;
5110: my $courseseed=unpack("%32S*",$courseid);
5111:
5112: my $num1=$symbchck+$symbseed+$namechck;
5113: my $num2=$nameseed+$domainseed+$courseseed;
5114: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5115: #&Apache::lonxml::debug("rndseed :$num:$symb");
5116: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5117: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5118: return "$num1,$num2";
5119: }
5120: }
5121:
5122: sub rndseed_64bit2 {
5123: my ($symb,$courseid,$domain,$username)=@_;
5124: {
5125: use integer;
5126: # strings need to be an even # of cahracters long, it it is odd the
5127: # last characters gets thrown away
5128: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5129: my $symbseed=numval($symb) << 10;
5130: my $namechck=unpack("%32S*",$username.' ');
5131:
5132: my $nameseed=numval($username) << 21;
5133: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5134: my $courseseed=unpack("%32S*",$courseid.' ');
5135:
5136: my $num1=$symbchck+$symbseed+$namechck;
5137: my $num2=$nameseed+$domainseed+$courseseed;
5138: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5139: #&Apache::lonxml::debug("rndseed :$num:$symb");
5140: return "$num1,$num2";
5141: }
5142: }
5143:
5144: sub rndseed_64bit3 {
5145: my ($symb,$courseid,$domain,$username)=@_;
5146: {
5147: use integer;
5148: # strings need to be an even # of cahracters long, it it is odd the
5149: # last characters gets thrown away
5150: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5151: my $symbseed=numval2($symb) << 10;
5152: my $namechck=unpack("%32S*",$username.' ');
5153:
5154: my $nameseed=numval2($username) << 21;
5155: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5156: my $courseseed=unpack("%32S*",$courseid.' ');
5157:
5158: my $num1=$symbchck+$symbseed+$namechck;
5159: my $num2=$nameseed+$domainseed+$courseseed;
5160: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5161: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5162: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5163:
5164: return "$num1:$num2";
5165: }
5166: }
5167:
5168: sub rndseed_64bit4 {
5169: my ($symb,$courseid,$domain,$username)=@_;
5170: {
5171: use integer;
5172: # strings need to be an even # of cahracters long, it it is odd the
5173: # last characters gets thrown away
5174: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5175: my $symbseed=numval3($symb) << 10;
5176: my $namechck=unpack("%32S*",$username.' ');
5177:
5178: my $nameseed=numval3($username) << 21;
5179: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5180: my $courseseed=unpack("%32S*",$courseid.' ');
5181:
5182: my $num1=$symbchck+$symbseed+$namechck;
5183: my $num2=$nameseed+$domainseed+$courseseed;
5184: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5185: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5186: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5187:
5188: return "$num1:$num2";
5189: }
5190: }
5191:
5192: sub rndseed_CODE_64bit {
5193: my ($symb,$courseid,$domain,$username)=@_;
5194: {
5195: use integer;
5196: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5197: my $symbseed=numval2($symb);
5198: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5199: my $CODEseed=numval(&getCODE());
5200: my $courseseed=unpack("%32S*",$courseid.' ');
5201: my $num1=$symbseed+$CODEchck;
5202: my $num2=$CODEseed+$courseseed+$symbchck;
5203: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5204: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5205: if ($_64bit) { $num1=(($num1<<32)>>32); }
5206: if ($_64bit) { $num2=(($num2<<32)>>32); }
5207: return "$num1:$num2";
5208: }
5209: }
5210:
5211: sub rndseed_CODE_64bit4 {
5212: my ($symb,$courseid,$domain,$username)=@_;
5213: {
5214: use integer;
5215: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5216: my $symbseed=numval3($symb);
5217: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5218: my $CODEseed=numval3(&getCODE());
5219: my $courseseed=unpack("%32S*",$courseid.' ');
5220: my $num1=$symbseed+$CODEchck;
5221: my $num2=$CODEseed+$courseseed+$symbchck;
5222: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5223: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5224: if ($_64bit) { $num1=(($num1<<32)>>32); }
5225: if ($_64bit) { $num2=(($num2<<32)>>32); }
5226: return "$num1:$num2";
5227: }
5228: }
5229:
5230: sub setup_random_from_rndseed {
5231: my ($rndseed)=@_;
5232: if ($rndseed =~/([,:])/) {
5233: my ($num1,$num2)=split(/[,:]/,$rndseed);
5234: &Math::Random::random_set_seed(abs($num1),abs($num2));
5235: } else {
5236: &Math::Random::random_set_seed_from_phrase($rndseed);
5237: }
5238: }
5239:
5240: sub latest_receipt_algorithm_id {
5241: return 'receipt2';
5242: }
5243:
5244: sub recunique {
5245: my $fucourseid=shift;
5246: my $unique;
5247: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5248: $unique=$ENV{"course.$fucourseid.internal.encseed"};
5249: } else {
5250: $unique=$perlvar{'lonReceipt'};
5251: }
5252: return unpack("%32C*",$unique);
5253: }
5254:
5255: sub recprefix {
5256: my $fucourseid=shift;
5257: my $prefix;
5258: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5259: $prefix=$ENV{"course.$fucourseid.internal.encpref"};
5260: } else {
5261: $prefix=$perlvar{'lonHostID'};
5262: }
5263: return unpack("%32C*",$prefix);
5264: }
5265:
5266: sub ireceipt {
5267: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
5268: my $cuname=unpack("%32C*",$funame);
5269: my $cudom=unpack("%32C*",$fudom);
5270: my $cucourseid=unpack("%32C*",$fucourseid);
5271: my $cusymb=unpack("%32C*",$fusymb);
5272: my $cunique=&recunique($fucourseid);
5273: my $cpart=unpack("%32S*",$part);
5274: my $return =&recprefix($fucourseid).'-';
5275: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
5276: $ENV{'request.state'} eq 'construct') {
5277: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
5278: " and ".($cpart%$cudom));
5279:
5280: $return.= ($cunique%$cuname+
5281: $cunique%$cudom+
5282: $cusymb%$cuname+
5283: $cusymb%$cudom+
5284: $cucourseid%$cuname+
5285: $cucourseid%$cudom+
5286: $cpart%$cuname+
5287: $cpart%$cudom);
5288: } else {
5289: $return.= ($cunique%$cuname+
5290: $cunique%$cudom+
5291: $cusymb%$cuname+
5292: $cusymb%$cudom+
5293: $cucourseid%$cuname+
5294: $cucourseid%$cudom);
5295: }
5296: return $return;
5297: }
5298:
5299: sub receipt {
5300: my ($part)=@_;
5301: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
5302: return &ireceipt($name,$domain,$courseid,$symb,$part);
5303: }
5304:
5305: # ------------------------------------------------------------ Serves up a file
5306: # returns either the contents of the file or
5307: # -1 if the file doesn't exist
5308: #
5309: # if the target is a file that was uploaded via DOCS,
5310: # a check will be made to see if a current copy exists on the local server,
5311: # if it does this will be served, otherwise a copy will be retrieved from
5312: # the home server for the course and stored in /home/httpd/html/userfiles on
5313: # the local server.
5314:
5315: sub getfile {
5316: my ($file) = @_;
5317:
5318: if ($file =~ m|^/*uploaded/|) { $file=&filelocation("",$file); }
5319: &repcopy($file);
5320: return &readfile($file);
5321: }
5322:
5323: sub repcopy_userfile {
5324: my ($file)=@_;
5325:
5326: if ($file =~ m|^/*uploaded/|) { $file=&filelocation("",$file); }
5327: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return OK; }
5328:
5329: my ($cdom,$cnum,$filename) =
5330: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
5331: my ($info,$rtncode);
5332: my $uri="/uploaded/$cdom/$cnum/$filename";
5333: if (-e "$file") {
5334: my @fileinfo = stat($file);
5335: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
5336: if ($lwpresp ne 'ok') {
5337: if ($rtncode eq '404') {
5338: unlink($file);
5339: }
5340: #my $ua=new LWP::UserAgent;
5341: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5342: #my $response=$ua->request($request);
5343: #if ($response->is_success()) {
5344: # return $response->content;
5345: # } else {
5346: # return -1;
5347: # }
5348: return -1;
5349: }
5350: if ($info < $fileinfo[9]) {
5351: return OK;
5352: }
5353: $info = '';
5354: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5355: if ($lwpresp ne 'ok') {
5356: return -1;
5357: }
5358: } else {
5359: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5360: if ($lwpresp ne 'ok') {
5361: my $ua=new LWP::UserAgent;
5362: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5363: my $response=$ua->request($request);
5364: if ($response->is_success()) {
5365: $info=$response->content;
5366: } else {
5367: return -1;
5368: }
5369: }
5370: my @parts = ($cdom,$cnum);
5371: if ($filename =~ m|^(.+)/[^/]+$|) {
5372: push @parts, split(/\//,$1);
5373: }
5374: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
5375: foreach my $part (@parts) {
5376: $path .= '/'.$part;
5377: if (!-e $path) {
5378: mkdir($path,0770);
5379: }
5380: }
5381: }
5382: open(FILE,">$file");
5383: print FILE $info;
5384: close(FILE);
5385: return OK;
5386: }
5387:
5388: sub tokenwrapper {
5389: my $uri=shift;
5390: $uri=~s|^http\://([^/]+)||;
5391: $uri=~s|^/||;
5392: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
5393: my $token=$1;
5394: my (undef,$udom,$uname,$file)=split('/',$uri,4);
5395: if ($udom && $uname && $file) {
5396: $file=~s|(\?\.*)*$||;
5397: &appenv("userfile.$udom/$uname/$file" => $ENV{'request.course.id'});
5398: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
5399: (($uri=~/\?/)?'&':'?').'token='.$token.
5400: '&tokenissued='.$perlvar{'lonHostID'};
5401: } else {
5402: return '/adm/notfound.html';
5403: }
5404: }
5405:
5406: sub getuploaded {
5407: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
5408: $uri=~s/^\///;
5409: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
5410: my $ua=new LWP::UserAgent;
5411: my $request=new HTTP::Request($reqtype,$uri);
5412: my $response=$ua->request($request);
5413: $$rtncode = $response->code;
5414: if (! $response->is_success()) {
5415: return 'failed';
5416: }
5417: if ($reqtype eq 'HEAD') {
5418: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
5419: } elsif ($reqtype eq 'GET') {
5420: $$info = $response->content;
5421: }
5422: return 'ok';
5423: }
5424:
5425: sub readfile {
5426: my $file = shift;
5427: if ( (! -e $file ) || ($file eq '') ) { return -1; };
5428: my $fh;
5429: open($fh,"<$file");
5430: my $a='';
5431: while (<$fh>) { $a .=$_; }
5432: return $a;
5433: }
5434:
5435: sub filelocation {
5436: my ($dir,$file) = @_;
5437: my $location;
5438: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
5439: if ($file=~m:^/~:) { # is a contruction space reference
5440: $location = $file;
5441: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
5442: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
5443: my ($udom,$uname,$filename)=
5444: ($file=~m|^/+uploaded/+([^/]+)/+([^/]+)/+(.*)$|);
5445: my $home=&homeserver($uname,$udom);
5446: my $is_me=0;
5447: my @ids=¤t_machine_ids();
5448: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
5449: if ($is_me) {
5450: $location=&Apache::loncommon::propath($udom,$uname).
5451: '/userfiles/'.$filename;
5452: } else {
5453: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
5454: $udom.'/'.$uname.'/'.$filename;
5455: }
5456: } else {
5457: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5458: $file=~s:^/res/:/:;
5459: if ( !( $file =~ m:^/:) ) {
5460: $location = $dir. '/'.$file;
5461: } else {
5462: $location = '/home/httpd/html/res'.$file;
5463: }
5464: }
5465: $location=~s://+:/:g; # remove duplicate /
5466: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
5467: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
5468: return $location;
5469: }
5470:
5471: sub hreflocation {
5472: my ($dir,$file)=@_;
5473: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
5474: my $finalpath=filelocation($dir,$file);
5475: $finalpath=~s-^/home/httpd/html--;
5476: $finalpath=~s-^/home/(\w+)/public_html/-/~$1/-;
5477: return $finalpath;
5478: } elsif ($file=~m-^/home-) {
5479: $file=~s-^/home/httpd/html--;
5480: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
5481: return $file;
5482: }
5483: return $file;
5484: }
5485:
5486: sub current_machine_domains {
5487: my $hostname=$hostname{$perlvar{'lonHostID'}};
5488: my @domains;
5489: while( my($id, $name) = each(%hostname)) {
5490: # &logthis("-$id-$name-$hostname-");
5491: if ($hostname eq $name) {
5492: push(@domains,$hostdom{$id});
5493: }
5494: }
5495: return @domains;
5496: }
5497:
5498: sub current_machine_ids {
5499: my $hostname=$hostname{$perlvar{'lonHostID'}};
5500: my @ids;
5501: while( my($id, $name) = each(%hostname)) {
5502: # &logthis("-$id-$name-$hostname-");
5503: if ($hostname eq $name) {
5504: push(@ids,$id);
5505: }
5506: }
5507: return @ids;
5508: }
5509:
5510: # ------------------------------------------------------------- Declutters URLs
5511:
5512: sub declutter {
5513: my $thisfn=shift;
5514: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
5515: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5516: $thisfn=~s/^\///;
5517: $thisfn=~s/^res\///;
5518: $thisfn=~s/\?.+$//;
5519: return $thisfn;
5520: }
5521:
5522: # ------------------------------------------------------------- Clutter up URLs
5523:
5524: sub clutter {
5525: my $thisfn='/'.&declutter(shift);
5526: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv|public)\//) {
5527: $thisfn='/res'.$thisfn;
5528: }
5529: return $thisfn;
5530: }
5531:
5532: sub freeze_escape {
5533: my ($value)=@_;
5534: if (ref($value)) {
5535: $value=&nfreeze($value);
5536: return '__FROZEN__'.&escape($value);
5537: }
5538: return &escape($value);
5539: }
5540:
5541: # -------------------------------------------------------- Escape Special Chars
5542:
5543: sub escape {
5544: my $str=shift;
5545: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
5546: return $str;
5547: }
5548:
5549: # ----------------------------------------------------- Un-Escape Special Chars
5550:
5551: sub unescape {
5552: my $str=shift;
5553: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
5554: return $str;
5555: }
5556:
5557: sub thaw_unescape {
5558: my ($value)=@_;
5559: if ($value =~ /^__FROZEN__/) {
5560: substr($value,0,10,undef);
5561: $value=&unescape($value);
5562: return &thaw($value);
5563: }
5564: return &unescape($value);
5565: }
5566:
5567: sub mod_perl_version {
5568: return 1;
5569: if (defined($perlvar{'MODPERL2'})) {
5570: return 2;
5571: }
5572: }
5573:
5574: sub correct_line_ends {
5575: my ($result)=@_;
5576: $$result =~s/\r\n/\n/mg;
5577: $$result =~s/\r/\n/mg;
5578: }
5579: # ================================================================ Main Program
5580:
5581: sub goodbye {
5582: &logthis("Starting Shut down");
5583: #not converted to using infrastruture and probably shouldn't be
5584: &logthis(sprintf("%-20s is %s",'%badServerCache',scalar(%badServerCache)));
5585: #converted
5586: &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
5587: &logthis(sprintf("%-20s is %s",'%homecache',scalar(%homecache)));
5588: &logthis(sprintf("%-20s is %s",'%titlecache',scalar(%titlecache)));
5589: &logthis(sprintf("%-20s is %s",'%courseresdatacache',scalar(%courseresdatacache)));
5590: #1.1 only
5591: &logthis(sprintf("%-20s is %s",'%userresdatacache',scalar(%userresdatacache)));
5592: &logthis(sprintf("%-20s is %s",'%getsectioncache',scalar(%getsectioncache)));
5593: &logthis(sprintf("%-20s is %s",'%courseresversioncache',scalar(%courseresversioncache)));
5594: &logthis(sprintf("%-20s is %s",'%resversioncache',scalar(%resversioncache)));
5595: &flushcourselogs();
5596: &logthis("Shutting down");
5597: return DONE;
5598: }
5599:
5600: BEGIN {
5601: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
5602: unless ($readit) {
5603: {
5604: # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
5605: open(my $config,"</etc/httpd/conf/loncapa.conf");
5606:
5607: while (my $configline=<$config>) {
5608: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
5609: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5610: chomp($varvalue);
5611: $perlvar{$varname}=$varvalue;
5612: }
5613: }
5614: close($config);
5615: }
5616: {
5617: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
5618:
5619: while (my $configline=<$config>) {
5620: if ($configline =~ /^[^\#]*PerlSetVar/) {
5621: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5622: chomp($varvalue);
5623: $perlvar{$varname}=$varvalue;
5624: }
5625: }
5626: close($config);
5627: }
5628:
5629: # ------------------------------------------------------------ Read domain file
5630: {
5631: %domaindescription = ();
5632: %domain_auth_def = ();
5633: %domain_auth_arg_def = ();
5634: my $fh;
5635: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
5636: while (<$fh>) {
5637: next if (/^(\#|\s*$)/);
5638: # next if /^\#/;
5639: chomp;
5640: my ($domain, $domain_description, $def_auth, $def_auth_arg,
5641: $def_lang, $city, $longi, $lati) = split(/:/,$_);
5642: $domain_auth_def{$domain}=$def_auth;
5643: $domain_auth_arg_def{$domain}=$def_auth_arg;
5644: $domaindescription{$domain}=$domain_description;
5645: $domain_lang_def{$domain}=$def_lang;
5646: $domain_city{$domain}=$city;
5647: $domain_longi{$domain}=$longi;
5648: $domain_lati{$domain}=$lati;
5649:
5650: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
5651: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
5652: }
5653: }
5654: close ($fh);
5655: }
5656:
5657:
5658: # ------------------------------------------------------------- Read hosts file
5659: {
5660: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
5661:
5662: while (my $configline=<$config>) {
5663: next if ($configline =~ /^(\#|\s*$)/);
5664: chomp($configline);
5665: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
5666: if ($id && $domain && $role && $name && $ip) {
5667: $hostname{$id}=$name;
5668: $hostdom{$id}=$domain;
5669: $hostip{$id}=$ip;
5670: $iphost{$ip}=$id;
5671: if ($role eq 'library') { $libserv{$id}=$name; }
5672: }
5673: }
5674: close($config);
5675: }
5676:
5677: # ------------------------------------------------------ Read spare server file
5678: {
5679: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
5680:
5681: while (my $configline=<$config>) {
5682: chomp($configline);
5683: if ($configline) {
5684: $spareid{$configline}=1;
5685: }
5686: }
5687: close($config);
5688: }
5689: # ------------------------------------------------------------ Read permissions
5690: {
5691: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
5692:
5693: while (my $configline=<$config>) {
5694: chomp($configline);
5695: if ($configline) {
5696: my ($role,$perm)=split(/ /,$configline);
5697: if ($perm ne '') { $pr{$role}=$perm; }
5698: }
5699: }
5700: close($config);
5701: }
5702:
5703: # -------------------------------------------- Read plain texts for permissions
5704: {
5705: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
5706:
5707: while (my $configline=<$config>) {
5708: chomp($configline);
5709: if ($configline) {
5710: my ($short,$plain)=split(/:/,$configline);
5711: if ($plain ne '') { $prp{$short}=$plain; }
5712: }
5713: }
5714: close($config);
5715: }
5716:
5717: # ---------------------------------------------------------- Read package table
5718: {
5719: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
5720:
5721: while (my $configline=<$config>) {
5722: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
5723: chomp($configline);
5724: my ($short,$plain)=split(/:/,$configline);
5725: my ($pack,$name)=split(/\&/,$short);
5726: if ($plain ne '') {
5727: $packagetab{$pack.'&'.$name.'&name'}=$name;
5728: $packagetab{$short}=$plain;
5729: }
5730: }
5731: close($config);
5732: }
5733:
5734: # ------------- set up temporary directory
5735: {
5736: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
5737:
5738: }
5739:
5740: %metacache=();
5741:
5742: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
5743: $dumpcount=0;
5744:
5745: &logtouch();
5746: &logthis('<font color=yellow>INFO: Read configuration</font>');
5747: $readit=1;
5748: {
5749: use integer;
5750: my $test=(2**32)+1;
5751: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
5752: &logthis(" Detected 64bit platform ($_64bit)");
5753: }
5754: }
5755: }
5756:
5757: 1;
5758: __END__
5759:
5760: =pod
5761:
5762: =head1 NAME
5763:
5764: Apache::lonnet - Subroutines to ask questions about things in the network.
5765:
5766: =head1 SYNOPSIS
5767:
5768: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
5769:
5770: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
5771:
5772: Common parameters:
5773:
5774: =over 4
5775:
5776: =item *
5777:
5778: $uname : an internal username (if $cname expecting a course Id specifically)
5779:
5780: =item *
5781:
5782: $udom : a domain (if $cdom expecting a course's domain specifically)
5783:
5784: =item *
5785:
5786: $symb : a resource instance identifier
5787:
5788: =item *
5789:
5790: $namespace : the name of a .db file that contains the data needed or
5791: being set.
5792:
5793: =back
5794:
5795: =head1 OVERVIEW
5796:
5797: lonnet provides subroutines which interact with the
5798: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
5799: about classes, users, and resources.
5800:
5801: For many of these objects you can also use this to store data about
5802: them or modify them in various ways.
5803:
5804: =head2 Symbs
5805:
5806: To identify a specific instance of a resource, LON-CAPA uses symbols
5807: or "symbs"X<symb>. These identifiers are built from the URL of the
5808: map, the resource number of the resource in the map, and the URL of
5809: the resource itself. The latter is somewhat redundant, but might help
5810: if maps change.
5811:
5812: An example is
5813:
5814: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
5815:
5816: The respective map entry is
5817:
5818: <resource id="19" src="/res/msu/korte/tests/part12.problem"
5819: title="Problem 2">
5820: </resource>
5821:
5822: Symbs are used by the random number generator, as well as to store and
5823: restore data specific to a certain instance of for example a problem.
5824:
5825: =head2 Storing And Retrieving Data
5826:
5827: X<store()>X<cstore()>X<restore()>Three of the most important functions
5828: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
5829: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
5830: is is the non-critical message twin of cstore. These functions are for
5831: handlers to store a perl hash to a user's permanent data space in an
5832: easy manner, and to retrieve it again on another call. It is expected
5833: that a handler would use this once at the beginning to retrieve data,
5834: and then again once at the end to send only the new data back.
5835:
5836: The data is stored in the user's data directory on the user's
5837: homeserver under the ID of the course.
5838:
5839: The hash that is returned by restore will have all of the previous
5840: value for all of the elements of the hash.
5841:
5842: Example:
5843:
5844: #creating a hash
5845: my %hash;
5846: $hash{'foo'}='bar';
5847:
5848: #storing it
5849: &Apache::lonnet::cstore(\%hash);
5850:
5851: #changing a value
5852: $hash{'foo'}='notbar';
5853:
5854: #adding a new value
5855: $hash{'bar'}='foo';
5856: &Apache::lonnet::cstore(\%hash);
5857:
5858: #retrieving the hash
5859: my %history=&Apache::lonnet::restore();
5860:
5861: #print the hash
5862: foreach my $key (sort(keys(%history))) {
5863: print("\%history{$key} = $history{$key}");
5864: }
5865:
5866: Will print out:
5867:
5868: %history{1:foo} = bar
5869: %history{1:keys} = foo:timestamp
5870: %history{1:timestamp} = 990455579
5871: %history{2:bar} = foo
5872: %history{2:foo} = notbar
5873: %history{2:keys} = foo:bar:timestamp
5874: %history{2:timestamp} = 990455580
5875: %history{bar} = foo
5876: %history{foo} = notbar
5877: %history{timestamp} = 990455580
5878: %history{version} = 2
5879:
5880: Note that the special hash entries C<keys>, C<version> and
5881: C<timestamp> were added to the hash. C<version> will be equal to the
5882: total number of versions of the data that have been stored. The
5883: C<timestamp> attribute will be the UNIX time the hash was
5884: stored. C<keys> is available in every historical section to list which
5885: keys were added or changed at a specific historical revision of a
5886: hash.
5887:
5888: B<Warning>: do not store the hash that restore returns directly. This
5889: will cause a mess since it will restore the historical keys as if the
5890: were new keys. I.E. 1:foo will become 1:1:foo etc.
5891:
5892: Calling convention:
5893:
5894: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
5895: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
5896:
5897: For more detailed information, see lonnet specific documentation.
5898:
5899: =head1 RETURN MESSAGES
5900:
5901: =over 4
5902:
5903: =item * B<con_lost>: unable to contact remote host
5904:
5905: =item * B<con_delayed>: unable to contact remote host, message will be delivered
5906: when the connection is brought back up
5907:
5908: =item * B<con_failed>: unable to contact remote host and unable to save message
5909: for later delivery
5910:
5911: =item * B<error:>: an error a occured, a description of the error follows the :
5912:
5913: =item * B<no_such_host>: unable to fund a host associated with the user/domain
5914: that was requested
5915:
5916: =back
5917:
5918: =head1 PUBLIC SUBROUTINES
5919:
5920: =head2 Session Environment Functions
5921:
5922: =over 4
5923:
5924: =item *
5925: X<appenv()>
5926: B<appenv(%hash)>: the value of %hash is written to
5927: the user envirnoment file, and will be restored for each access this
5928: user makes during this session, also modifies the %ENV for the current
5929: process
5930:
5931: =item *
5932: X<delenv()>
5933: B<delenv($regexp)>: removes all items from the session
5934: environment file that matches the regular expression in $regexp. The
5935: values are also delted from the current processes %ENV.
5936:
5937: =back
5938:
5939: =head2 User Information
5940:
5941: =over 4
5942:
5943: =item *
5944: X<queryauthenticate()>
5945: B<queryauthenticate($uname,$udom)>: try to determine user's current
5946: authentication scheme
5947:
5948: =item *
5949: X<authenticate()>
5950: B<authenticate($uname,$upass,$udom)>: try to
5951: authenticate user from domain's lib servers (first use the current
5952: one). C<$upass> should be the users password.
5953:
5954: =item *
5955: X<homeserver()>
5956: B<homeserver($uname,$udom)>: find the server which has
5957: the user's directory and files (there must be only one), this caches
5958: the answer, and also caches if there is a borken connection.
5959:
5960: =item *
5961: X<idget()>
5962: B<idget($udom,@ids)>: find the usernames behind a list of IDs
5963: (IDs are a unique resource in a domain, there must be only 1 ID per
5964: username, and only 1 username per ID in a specific domain) (returns
5965: hash: id=>name,id=>name)
5966:
5967: =item *
5968: X<idrget()>
5969: B<idrget($udom,@unames)>: find the IDs behind a list of
5970: usernames (returns hash: name=>id,name=>id)
5971:
5972: =item *
5973: X<idput()>
5974: B<idput($udom,%ids)>: store away a list of names and associated IDs
5975:
5976: =item *
5977: X<rolesinit()>
5978: B<rolesinit($udom,$username,$authhost)>: get user privileges
5979:
5980: =item *
5981: X<getsection()>
5982: B<getsection($udom,$uname,$cname)>: finds the section of student in the
5983: course $cname, return section name/number or '' for "not in course"
5984: and '-1' for "no section"
5985:
5986: =item *
5987: X<userenvironment()>
5988: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
5989: passed in @what from the requested user's environment, returns a hash
5990:
5991: =back
5992:
5993: =head2 User Roles
5994:
5995: =over 4
5996:
5997: =item *
5998:
5999: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
6000: actions
6001: F: full access
6002: U,I,K: authentication modes (cxx only)
6003: '': forbidden
6004: 1: user needs to choose course
6005: 2: browse allowed
6006:
6007: =item *
6008:
6009: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
6010: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
6011: and course level
6012:
6013: =item *
6014:
6015: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
6016: explanation of a user role term
6017:
6018: =back
6019:
6020: =head2 User Modification
6021:
6022: =over 4
6023:
6024: =item *
6025:
6026: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
6027: user for the level given by URL. Optional start and end dates (leave empty
6028: string or zero for "no date")
6029:
6030: =item *
6031:
6032: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
6033: change a users, password, possible return values are: ok,
6034: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
6035: refused
6036:
6037: =item *
6038:
6039: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
6040:
6041: =item *
6042:
6043: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
6044: modify user
6045:
6046: =item *
6047:
6048: modifystudent
6049:
6050: modify a students enrollment and identification information.
6051: The course id is resolved based on the current users environment.
6052: This means the envoking user must be a course coordinator or otherwise
6053: associated with a course.
6054:
6055: This call is essentially a wrapper for lonnet::modifyuser and
6056: lonnet::modify_student_enrollment
6057:
6058: Inputs:
6059:
6060: =over 4
6061:
6062: =item B<$udom> Students loncapa domain
6063:
6064: =item B<$uname> Students loncapa login name
6065:
6066: =item B<$uid> Students id/student number
6067:
6068: =item B<$umode> Students authentication mode
6069:
6070: =item B<$upass> Students password
6071:
6072: =item B<$first> Students first name
6073:
6074: =item B<$middle> Students middle name
6075:
6076: =item B<$last> Students last name
6077:
6078: =item B<$gene> Students generation
6079:
6080: =item B<$usec> Students section in course
6081:
6082: =item B<$end> Unix time of the roles expiration
6083:
6084: =item B<$start> Unix time of the roles start date
6085:
6086: =item B<$forceid> If defined, allow $uid to be changed
6087:
6088: =item B<$desiredhome> server to use as home server for student
6089:
6090: =back
6091:
6092: =item *
6093:
6094: modify_student_enrollment
6095:
6096: Change a students enrollment status in a class. The environment variable
6097: 'role.request.course' must be defined for this function to proceed.
6098:
6099: Inputs:
6100:
6101: =over 4
6102:
6103: =item $udom, students domain
6104:
6105: =item $uname, students name
6106:
6107: =item $uid, students user id
6108:
6109: =item $first, students first name
6110:
6111: =item $middle
6112:
6113: =item $last
6114:
6115: =item $gene
6116:
6117: =item $usec
6118:
6119: =item $end
6120:
6121: =item $start
6122:
6123: =back
6124:
6125:
6126: =item *
6127:
6128: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
6129: custom role; give a custom role to a user for the level given by URL. Specify
6130: name and domain of role author, and role name
6131:
6132: =item *
6133:
6134: revokerole($udom,$uname,$url,$role) : revoke a role for url
6135:
6136: =item *
6137:
6138: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
6139:
6140: =back
6141:
6142: =head2 Course Infomation
6143:
6144: =over 4
6145:
6146: =item *
6147:
6148: coursedescription($courseid) : course description
6149:
6150: =item *
6151:
6152: courseresdata($coursenum,$coursedomain,@which) : request for current
6153: parameter setting for a specific course, @what should be a list of
6154: parameters to ask about. This routine caches answers for 5 minutes.
6155:
6156: =back
6157:
6158: =head2 Course Modification
6159:
6160: =over 4
6161:
6162: =item *
6163:
6164: writecoursepref($courseid,%prefs) : write preferences (environment
6165: database) for a course
6166:
6167: =item *
6168:
6169: createcourse($udom,$description,$url) : make/modify course
6170:
6171: =back
6172:
6173: =head2 Resource Subroutines
6174:
6175: =over 4
6176:
6177: =item *
6178:
6179: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
6180:
6181: =item *
6182:
6183: repcopy($filename) : subscribes to the requested file, and attempts to
6184: replicate from the owning library server, Might return
6185: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
6186: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
6187: resource. Expects the local filesystem pathname
6188: (/home/httpd/html/res/....)
6189:
6190: =back
6191:
6192: =head2 Resource Information
6193:
6194: =over 4
6195:
6196: =item *
6197:
6198: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
6199: a vairety of different possible values, $varname should be a request
6200: string, and the other parameters can be used to specify who and what
6201: one is asking about.
6202:
6203: Possible values for $varname are environment.lastname (or other item
6204: from the envirnment hash), user.name (or someother aspect about the
6205: user), resource.0.maxtries (or some other part and parameter of a
6206: resource)
6207:
6208: =item *
6209:
6210: directcondval($number) : get current value of a condition; reads from a state
6211: string
6212:
6213: =item *
6214:
6215: condval($condidx) : value of condition index based on state
6216:
6217: =item *
6218:
6219: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
6220: resource's metadata, $what should be either a specific key, or either
6221: 'keys' (to get a list of possible keys) or 'packages' to get a list of
6222: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
6223:
6224: this function automatically caches all requests
6225:
6226: =item *
6227:
6228: metadata_query($query,$custom,$customshow) : make a metadata query against the
6229: network of library servers; returns file handle of where SQL and regex results
6230: will be stored for query
6231:
6232: =item *
6233:
6234: symbread($filename) : return symbolic list entry (filename argument optional);
6235: returns the data handle
6236:
6237: =item *
6238:
6239: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
6240: a possible symb for the URL in $thisfn, and if is an encryypted
6241: resource that the user accessed using /enc/ returns a 1 on success, 0
6242: on failure, user must be in a course, as it assumes the existance of
6243: the course initial hash, and uses $ENV('request.course.id'}
6244:
6245:
6246: =item *
6247:
6248: symbclean($symb) : removes versions numbers from a symb, returns the
6249: cleaned symb
6250:
6251: =item *
6252:
6253: is_on_map($uri) : checks if the $uri is somewhere on the current
6254: course map, user must be in a course for it to work.
6255:
6256: =item *
6257:
6258: numval($salt) : return random seed value (addend for rndseed)
6259:
6260: =item *
6261:
6262: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
6263: a random seed, all arguments are optional, if they aren't sent it uses the
6264: environment to derive them. Note: if symb isn't sent and it can't get one
6265: from &symbread it will use the current time as its return value
6266:
6267: =item *
6268:
6269: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
6270: unfakeable, receipt
6271:
6272: =item *
6273:
6274: receipt() : API to ireceipt working off of ENV values; given out to users
6275:
6276: =item *
6277:
6278: countacc($url) : count the number of accesses to a given URL
6279:
6280: =item *
6281:
6282: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
6283:
6284: =item *
6285:
6286: checkin($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 $tcrsid)
6287:
6288: =item *
6289:
6290: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
6291:
6292: =item *
6293:
6294: devalidate($symb) : devalidate temporary spreadsheet calculations,
6295: forcing spreadsheet to reevaluate the resource scores next time.
6296:
6297: =back
6298:
6299: =head2 Storing/Retreiving Data
6300:
6301: =over 4
6302:
6303: =item *
6304:
6305: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
6306: for this url; hashref needs to be given and should be a \%hashname; the
6307: remaining args aren't required and if they aren't passed or are '' they will
6308: be derived from the ENV
6309:
6310: =item *
6311:
6312: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
6313: uses critical subroutine
6314:
6315: =item *
6316:
6317: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
6318: all args are optional
6319:
6320: =item *
6321:
6322: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
6323: works very similar to store/cstore, but all data is stored in a
6324: temporary location and can be reset using tmpreset, $storehash should
6325: be a hash reference, returns nothing on success
6326:
6327: =item *
6328:
6329: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
6330: similar to restore, but all data is stored in a temporary location and
6331: can be reset using tmpreset. Returns a hash of values on success,
6332: error string otherwise.
6333:
6334: =item *
6335:
6336: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
6337: deltes all keys for $symb form the temporary storage hash.
6338:
6339: =item *
6340:
6341: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6342: reference filled in from namesp ($udom and $uname are optional)
6343:
6344: =item *
6345:
6346: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
6347: namesp ($udom and $uname are optional)
6348:
6349: =item *
6350:
6351: dump($namespace,$udom,$uname,$regexp) :
6352: dumps the complete (or key matching regexp) namespace into a hash
6353: ($udom, $uname and $regexp are optional)
6354:
6355: =item *
6356:
6357: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
6358: $store can be a scalar, an array reference, or if the amount to be
6359: incremented is > 1, a hash reference.
6360:
6361: ($udom and $uname are optional)
6362:
6363: =item *
6364:
6365: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
6366: ($udom and $uname are optional)
6367:
6368: =item *
6369:
6370: putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
6371: keys used in storehash include version information (e.g., 1:$symb:message etc.) as
6372: used in records written by &store and retrieved by &restore. This function
6373: was created for use in editing discussion posts, without incrementing the
6374: version number included in the key for a particular post. The colon
6375: separated list of attribute names (e.g., the value associated with the key
6376: 1:keys:$symb) is also generated and passed in the ampersand separated
6377: items sent to lonnet::reply().
6378:
6379: =item *
6380:
6381: cput($namespace,$storehash,$udom,$uname) : critical put
6382: ($udom and $uname are optional)
6383:
6384: =item *
6385:
6386: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6387: reference filled in from namesp (encrypts the return communication)
6388: ($udom and $uname are optional)
6389:
6390: =item *
6391:
6392: log($udom,$name,$home,$message) : write to permanent log for user; use
6393: critical subroutine
6394:
6395: =back
6396:
6397: =head2 Network Status Functions
6398:
6399: =over 4
6400:
6401: =item *
6402:
6403: dirlist($uri) : return directory list based on URI
6404:
6405: =item *
6406:
6407: spareserver() : find server with least workload from spare.tab
6408:
6409: =back
6410:
6411: =head2 Apache Request
6412:
6413: =over 4
6414:
6415: =item *
6416:
6417: ssi($url,%hash) : server side include, does a complete request cycle on url to
6418: localhost, posts hash
6419:
6420: =back
6421:
6422: =head2 Data to String to Data
6423:
6424: =over 4
6425:
6426: =item *
6427:
6428: hash2str(%hash) : convert a hash into a string complete with escaping and '='
6429: and '&' separators, supports elements that are arrayrefs and hashrefs
6430:
6431: =item *
6432:
6433: hashref2str($hashref) : convert a hashref into a string complete with
6434: escaping and '=' and '&' separators, supports elements that are
6435: arrayrefs and hashrefs
6436:
6437: =item *
6438:
6439: arrayref2str($arrayref) : convert an arrayref into a string complete
6440: with escaping and '&' separators, supports elements that are arrayrefs
6441: and hashrefs
6442:
6443: =item *
6444:
6445: str2hash($string) : convert string to hash using unescaping and
6446: splitting on '=' and '&', supports elements that are arrayrefs and
6447: hashrefs
6448:
6449: =item *
6450:
6451: str2array($string) : convert string to hash using unescaping and
6452: splitting on '&', supports elements that are arrayrefs and hashrefs
6453:
6454: =back
6455:
6456: =head2 Logging Routines
6457:
6458: =over 4
6459:
6460: These routines allow one to make log messages in the lonnet.log and
6461: lonnet.perm logfiles.
6462:
6463: =item *
6464:
6465: logtouch() : make sure the logfile, lonnet.log, exists
6466:
6467: =item *
6468:
6469: logthis() : append message to the normal lonnet.log file, it gets
6470: preiodically rolled over and deleted.
6471:
6472: =item *
6473:
6474: logperm() : append a permanent message to lonnet.perm.log, this log
6475: file never gets deleted by any automated portion of the system, only
6476: messages of critical importance should go in here.
6477:
6478: =back
6479:
6480: =head2 General File Helper Routines
6481:
6482: =over 4
6483:
6484: =item *
6485:
6486: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
6487: (a) files in /uploaded
6488: (i) If a local copy of the file exists -
6489: compares modification date of local copy with last-modified date for
6490: definitive version stored on home server for course. If local copy is
6491: stale, requests a new version from the home server and stores it.
6492: If the original has been removed from the home server, then local copy
6493: is unlinked.
6494: (ii) If local copy does not exist -
6495: requests the file from the home server and stores it.
6496:
6497: If $caller is 'uploadrep':
6498: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
6499: for request for files originally uploaded via DOCS.
6500: - returns 'ok' if fresh local copy now available, -1 otherwise.
6501:
6502: Otherwise:
6503: This indicates a call from the content generation phase of the request.
6504: - returns the entire contents of the file or -1.
6505:
6506: (b) files in /res
6507: - returns the entire contents of a file or -1;
6508: it properly subscribes to and replicates the file if neccessary.
6509:
6510: =item *
6511:
6512: filelocation($dir,$file) : returns file system location of a file
6513: based on URI; meant to be "fairly clean" absolute reference, $dir is a
6514: directory that relative $file lookups are to looked in ($dir of /a/dir
6515: and a file of ../bob will become /a/bob)
6516:
6517: =item *
6518:
6519: hreflocation($dir,$file) : returns file system location or a URL; same as
6520: filelocation except for hrefs
6521:
6522: =item *
6523:
6524: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
6525:
6526: =back
6527:
6528: =head2 HTTP Helper Routines
6529:
6530: =over 4
6531:
6532: =item *
6533:
6534: escape() : unpack non-word characters into CGI-compatible hex codes
6535:
6536: =item *
6537:
6538: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
6539:
6540: =back
6541:
6542: =head1 PRIVATE SUBROUTINES
6543:
6544: =head2 Underlying communication routines (Shouldn't call)
6545:
6546: =over 4
6547:
6548: =item *
6549:
6550: subreply() : tries to pass a message to lonc, returns con_lost if incapable
6551:
6552: =item *
6553:
6554: reply() : uses subreply to send a message to remote machine, logs all failures
6555:
6556: =item *
6557:
6558: critical() : passes a critical message to another server; if cannot
6559: get through then place message in connection buffer directory and
6560: returns con_delayed, if incapable of saving message, returns
6561: con_failed
6562:
6563: =item *
6564:
6565: reconlonc() : tries to reconnect lonc client processes.
6566:
6567: =back
6568:
6569: =head2 Resource Access Logging
6570:
6571: =over 4
6572:
6573: =item *
6574:
6575: flushcourselogs() : flush (save) buffer logs and access logs
6576:
6577: =item *
6578:
6579: courselog($what) : save message for course in hash
6580:
6581: =item *
6582:
6583: courseacclog($what) : save message for course using &courselog(). Perform
6584: special processing for specific resource types (problems, exams, quizzes, etc).
6585:
6586: =item *
6587:
6588: goodbye() : flush course logs and log shutting down; it is called in srm.conf
6589: as a PerlChildExitHandler
6590:
6591: =back
6592:
6593: =head2 Other
6594:
6595: =over 4
6596:
6597: =item *
6598:
6599: symblist($mapname,%newhash) : update symbolic storage links
6600:
6601: =back
6602:
6603: =cut
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