Annotation of loncom/lonnet/perl/lonnet.pm, revision 1.403
1.1 albertel 1: # The LearningOnline Network
2: # TCP networking package
1.12 www 3: #
1.403 ! www 4: # $Id: lonnet.pm,v 1.402 2003/08/14 22:26:40 bowersj2 Exp $
1.178 www 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: #
1.169 harris41 28: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 3/2 Gerd Kortemeyer
51: # 3/19,3/20 Gerd Kortemeyer
52: # 5/26,5/28 Gerd Kortemeyer
53: # 5/30 H. K. Ng
54: # 6/1 Gerd Kortemeyer
55: # July Guy Albertelli
56: # 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20,9/21,9/26,
57: # 10/2 Gerd Kortemeyer
1.179 www 58: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
1.182 matthew 59: # 12/5 Matthew Hall
1.184 www 60: # 12/5 Guy Albertelli
1.190 www 61: # 12/6,12/7,12/12 Gerd Kortemeyer
1.195 www 62: # 12/21,12/22,12/27,12/28 Gerd Kortemeyer
1.196 www 63: # YEAR=2002
1.200 www 64: # 1/4,2/4,2/7 Gerd Kortemeyer
1.171 www 65: #
1.169 harris41 66: ###
67:
1.1 albertel 68: package Apache::lonnet;
69:
70: use strict;
71: use Apache::File;
1.8 www 72: use LWP::UserAgent();
1.15 www 73: use HTTP::Headers;
1.11 www 74: use vars
1.300 albertel 75: qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom
1.301 www 76: %libserv %pr %prp %metacache %packagetab %titlecache
1.349 www 77: %courselogs %accesshash %userrolehash $processmarker $dumpcount
1.352 www 78: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseresdatacache
1.403 ! www 79: %domaindescription %domain_auth_def %domain_auth_arg_def
! 80: %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir);
! 81:
1.1 albertel 82: use IO::Socket;
1.31 www 83: use GDBM_File;
1.8 www 84: use Apache::Constants qw(:common :http);
1.208 albertel 85: use HTML::LCParser;
1.88 www 86: use Fcntl qw(:flock);
1.294 matthew 87: use Apache::loncoursedata;
88:
1.195 www 89: my $readit;
1.1 albertel 90:
91: # --------------------------------------------------------------------- Logging
92:
1.163 harris41 93: sub logtouch {
94: my $execdir=$perlvar{'lonDaemons'};
95: unless (-e "$execdir/logs/lonnet.log") {
96: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
97: close $fh;
98: }
99: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
100: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
101: }
102:
1.1 albertel 103: sub logthis {
104: my $message=shift;
105: my $execdir=$perlvar{'lonDaemons'};
106: my $now=time;
107: my $local=localtime($now);
1.162 harris41 108: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
109: print $fh "$local ($$): $message\n";
1.1 albertel 110: return 1;
111: }
112:
113: sub logperm {
114: my $message=shift;
115: my $execdir=$perlvar{'lonDaemons'};
116: my $now=time;
117: my $local=localtime($now);
1.162 harris41 118: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
119: print $fh "$now:$message:$local\n";
1.1 albertel 120: return 1;
121: }
122:
123: # -------------------------------------------------- Non-critical communication
124: sub subreply {
125: my ($cmd,$server)=@_;
126: my $peerfile="$perlvar{'lonSockDir'}/$server";
127: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
128: Type => SOCK_STREAM,
129: Timeout => 10)
130: or return "con_lost";
131: print $client "$cmd\n";
132: my $answer=<$client>;
1.9 www 133: if (!$answer) { $answer="con_lost"; }
1.1 albertel 134: chomp($answer);
135: return $answer;
136: }
137:
138: sub reply {
139: my ($cmd,$server)=@_;
1.205 www 140: unless (defined($hostname{$server})) { return 'no_such_host'; }
1.1 albertel 141: my $answer=subreply($cmd,$server);
1.203 www 142: if ($answer eq 'con_lost') {
1.311 matthew 143: #sleep 5;
144: #$answer=subreply($cmd,$server);
145: #if ($answer eq 'con_lost') {
1.233 albertel 146: # &logthis("Second attempt con_lost on $server");
147: # my $peerfile="$perlvar{'lonSockDir'}/$server";
148: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
149: # Type => SOCK_STREAM,
150: # Timeout => 10)
151: # or return "con_lost";
152: # &logthis("Killing socket");
153: # print $client "close_connection_exit\n";
154: #sleep 5;
155: # $answer=subreply($cmd,$server);
156: #}
1.203 www 157: }
1.65 www 158: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
1.12 www 159: &logthis("<font color=blue>WARNING:".
160: " $cmd to $server returned $answer</font>");
161: }
1.1 albertel 162: return $answer;
163: }
164:
165: # ----------------------------------------------------------- Send USR1 to lonc
166:
167: sub reconlonc {
168: my $peerfile=shift;
169: &logthis("Trying to reconnect for $peerfile");
170: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
171: if (my $fh=Apache::File->new("$loncfile")) {
172: my $loncpid=<$fh>;
173: chomp($loncpid);
174: if (kill 0 => $loncpid) {
175: &logthis("lonc at pid $loncpid responding, sending USR1");
176: kill USR1 => $loncpid;
177: sleep 1;
178: if (-e "$peerfile") { return; }
179: &logthis("$peerfile still not there, give it another try");
180: sleep 5;
181: if (-e "$peerfile") { return; }
1.12 www 182: &logthis(
183: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
1.1 albertel 184: } else {
1.12 www 185: &logthis(
186: "<font color=blue>WARNING:".
187: " lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 188: }
189: } else {
1.12 www 190: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
1.1 albertel 191: }
192: }
193:
194: # ------------------------------------------------------ Critical communication
1.12 www 195:
1.1 albertel 196: sub critical {
197: my ($cmd,$server)=@_;
1.89 www 198: unless ($hostname{$server}) {
199: &logthis("<font color=blue>WARNING:".
200: " Critical message to unknown server ($server)</font>");
201: return 'no_such_host';
202: }
1.1 albertel 203: my $answer=reply($cmd,$server);
204: if ($answer eq 'con_lost') {
205: my $pingreply=reply('ping',$server);
206: &reconlonc("$perlvar{'lonSockDir'}/$server");
207: my $pongreply=reply('pong',$server);
208: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
209: $answer=reply($cmd,$server);
210: if ($answer eq 'con_lost') {
211: my $now=time;
212: my $middlename=$cmd;
1.5 www 213: $middlename=substr($middlename,0,16);
1.1 albertel 214: $middlename=~s/\W//g;
215: my $dfilename=
1.305 www 216: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
217: $dumpcount++;
1.1 albertel 218: {
219: my $dfh;
220: if ($dfh=Apache::File->new(">$dfilename")) {
1.7 www 221: print $dfh "$cmd\n";
1.1 albertel 222: }
223: }
224: sleep 2;
225: my $wcmd='';
226: {
227: my $dfh;
228: if ($dfh=Apache::File->new("$dfilename")) {
229: $wcmd=<$dfh>;
230: }
231: }
232: chomp($wcmd);
1.7 www 233: if ($wcmd eq $cmd) {
1.12 www 234: &logthis("<font color=blue>WARNING: ".
235: "Connection buffer $dfilename: $cmd</font>");
1.1 albertel 236: &logperm("D:$server:$cmd");
237: return 'con_delayed';
238: } else {
1.12 www 239: &logthis("<font color=red>CRITICAL:"
240: ." Critical connection failed: $server $cmd</font>");
1.1 albertel 241: &logperm("F:$server:$cmd");
242: return 'con_failed';
243: }
244: }
245: }
246: return $answer;
1.374 www 247: }
248:
249: # ------------------------------------------- Transfer profile into environment
250:
251: sub transfer_profile_to_env {
252: my ($lonidsdir,$handle)=@_;
253: my @profile;
254: {
255: my $idf=Apache::File->new("$lonidsdir/$handle.id");
256: flock($idf,LOCK_SH);
257: @profile=<$idf>;
258: $idf->close();
259: }
260: my $envi;
261: for ($envi=0;$envi<=$#profile;$envi++) {
262: chomp($profile[$envi]);
263: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
264: $ENV{$envname} = $envvalue;
265: }
266: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
1.1 albertel 267: }
268:
1.5 www 269: # ---------------------------------------------------------- Append Environment
270:
271: sub appenv {
1.6 www 272: my %newenv=@_;
1.191 harris41 273: foreach (keys %newenv) {
1.35 www 274: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
275: &logthis("<font color=blue>WARNING: ".
1.151 www 276: "Attempt to modify environment ".$_." to ".$newenv{$_}
277: .'</font>');
1.35 www 278: delete($newenv{$_});
279: } else {
280: $ENV{$_}=$newenv{$_};
281: }
1.191 harris41 282: }
1.95 www 283:
284: my $lockfh;
285: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
1.97 www 286: return 'error: '.$!;
1.95 www 287: }
288: unless (flock($lockfh,LOCK_EX)) {
289: &logthis("<font color=blue>WARNING: ".
290: 'Could not obtain exclusive lock in appenv: '.$!);
291: $lockfh->close();
292: return 'error: '.$!;
293: }
294:
1.6 www 295: my @oldenv;
296: {
297: my $fh;
298: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
1.97 www 299: return 'error: '.$!;
1.6 www 300: }
301: @oldenv=<$fh>;
1.89 www 302: $fh->close();
1.6 www 303: }
304: for (my $i=0; $i<=$#oldenv; $i++) {
305: chomp($oldenv[$i]);
1.9 www 306: if ($oldenv[$i] ne '') {
307: my ($name,$value)=split(/=/,$oldenv[$i]);
1.24 www 308: unless (defined($newenv{$name})) {
309: $newenv{$name}=$value;
310: }
1.9 www 311: }
1.6 www 312: }
313: {
314: my $fh;
315: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
316: return 'error';
317: }
318: my $newname;
1.93 www 319: foreach $newname (keys %newenv) {
1.6 www 320: print $fh "$newname=$newenv{$newname}\n";
321: }
1.86 albertel 322: $fh->close();
1.56 www 323: }
1.95 www 324:
325: $lockfh->close();
1.56 www 326: return 'ok';
327: }
328: # ----------------------------------------------------- Delete from Environment
329:
330: sub delenv {
331: my $delthis=shift;
332: my %newenv=();
333: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
334: &logthis("<font color=blue>WARNING: ".
335: "Attempt to delete from environment ".$delthis);
336: return 'error';
337: }
338: my @oldenv;
339: {
340: my $fh;
341: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
342: return 'error';
343: }
1.89 www 344: unless (flock($fh,LOCK_SH)) {
345: &logthis("<font color=blue>WARNING: ".
346: 'Could not obtain shared lock in delenv: '.$!);
347: $fh->close();
348: return 'error: '.$!;
349: }
1.56 www 350: @oldenv=<$fh>;
1.89 www 351: $fh->close();
1.56 www 352: }
353: {
354: my $fh;
355: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
356: return 'error';
357: }
1.89 www 358: unless (flock($fh,LOCK_EX)) {
359: &logthis("<font color=blue>WARNING: ".
360: 'Could not obtain exclusive lock in delenv: '.$!);
361: $fh->close();
362: return 'error: '.$!;
363: }
1.191 harris41 364: foreach (@oldenv) {
1.56 www 365: unless ($_=~/^$delthis/) { print $fh $_; }
1.191 harris41 366: }
1.87 www 367: $fh->close();
1.5 www 368: }
369: return 'ok';
1.369 albertel 370: }
371:
372: # ------------------------------------------ Find out current server userload
373: # there is a copy in lond
374: sub userload {
375: my $numusers=0;
376: {
377: opendir(LONIDS,$perlvar{'lonIDsDir'});
378: my $filename;
379: my $curtime=time;
380: while ($filename=readdir(LONIDS)) {
381: if ($filename eq '.' || $filename eq '..') {next;}
382: my ($atime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[8];
1.371 albertel 383: if ($curtime-$atime < 3600) { $numusers++; }
1.369 albertel 384: }
385: closedir(LONIDS);
386: }
387: my $userloadpercent=0;
388: my $maxuserload=$perlvar{'lonUserLoadLim'};
389: if ($maxuserload) {
1.371 albertel 390: $userloadpercent=100*$numusers/$maxuserload;
1.369 albertel 391: }
1.372 albertel 392: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.369 albertel 393: return $userloadpercent;
1.283 www 394: }
395:
396: # ------------------------------------------ Fight off request when overloaded
397:
398: sub overloaderror {
399: my ($r,$checkserver)=@_;
400: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
401: my $loadavg;
402: if ($checkserver eq $perlvar{'lonHostID'}) {
403: my $loadfile=Apache::File->new('/proc/loadavg');
404: $loadavg=<$loadfile>;
405: $loadavg =~ s/\s.*//g;
1.285 matthew 406: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
1.283 www 407: } else {
408: $loadavg=&reply('load',$checkserver);
409: }
1.285 matthew 410: my $overload=$loadavg-100;
1.283 www 411: if ($overload>0) {
1.285 matthew 412: $r->err_headers_out->{'Retry-After'}=$overload;
1.283 www 413: $r->log_error('Overload of '.$overload.' on '.$checkserver);
414: return 413;
415: }
416: return '';
1.5 www 417: }
1.1 albertel 418:
419: # ------------------------------ Find server with least workload from spare.tab
1.11 www 420:
1.1 albertel 421: sub spareserver {
1.370 albertel 422: my ($loadpercent,$userloadpercent) = @_;
1.1 albertel 423: my $tryserver;
424: my $spareserver='';
1.370 albertel 425: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
426: my $lowestserver=$loadpercent > $userloadpercent?
427: $loadpercent : $userloadpercent;
1.1 albertel 428: foreach $tryserver (keys %spareid) {
1.370 albertel 429: my $loadans=reply('load',$tryserver);
430: my $userloadans=reply('userload',$tryserver);
431: if ($userloadans !~ /\d/) { $userloadans=0; }
432: my $answer=$loadans > $userloadans?
433: $loadans : $userloadans;
1.1 albertel 434: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
435: $spareserver="http://$hostname{$tryserver}";
436: $lowestserver=$answer;
437: }
1.370 albertel 438: }
1.1 albertel 439: return $spareserver;
1.202 matthew 440: }
441:
442: # --------------------------------------------- Try to change a user's password
443:
444: sub changepass {
445: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
446: $currentpass = &escape($currentpass);
447: $newpass = &escape($newpass);
448: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
449: $server);
450: if (! $answer) {
451: &logthis("No reply on password change request to $server ".
452: "by $uname in domain $udom.");
453: } elsif ($answer =~ "^ok") {
454: &logthis("$uname in $udom successfully changed their password ".
455: "on $server.");
456: } elsif ($answer =~ "^pwchange_failure") {
457: &logthis("$uname in $udom was unable to change their password ".
458: "on $server. The action was blocked by either lcpasswd ".
459: "or pwchange");
460: } elsif ($answer =~ "^non_authorized") {
461: &logthis("$uname in $udom did not get their password correct when ".
462: "attempting to change it on $server.");
463: } elsif ($answer =~ "^auth_mode_error") {
464: &logthis("$uname in $udom attempted to change their password despite ".
465: "not being locally or internally authenticated on $server.");
466: } elsif ($answer =~ "^unknown_user") {
467: &logthis("$uname in $udom attempted to change their password ".
468: "on $server but were unable to because $server is not ".
469: "their home server.");
470: } elsif ($answer =~ "^refused") {
471: &logthis("$server refused to change $uname in $udom password because ".
472: "it was sent an unencrypted request to change the password.");
473: }
474: return $answer;
1.1 albertel 475: }
476:
1.169 harris41 477: # ----------------------- Try to determine user's current authentication scheme
478:
479: sub queryauthenticate {
480: my ($uname,$udom)=@_;
481: if (($perlvar{'lonRole'} eq 'library') &&
482: ($udom eq $perlvar{'lonDefDomain'})) {
483: my $answer=reply("encrypt:currentauth:$udom:$uname",
484: $perlvar{'lonHostID'});
485: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
486: if (length($answer)) {
487: return $answer;
488: }
489: else {
490: &logthis("User $uname at $udom lacks an authentication mechanism");
491: return 'no_host';
492: }
493: }
494: }
495:
496: my $tryserver;
497: foreach $tryserver (keys %libserv) {
498: if ($hostdom{$tryserver} eq $udom) {
499: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
500: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
501: if (length($answer)) {
502: return $answer;
503: }
504: else {
505: &logthis("User $uname at $udom lacks an authentication mechanism");
506: return 'no_host';
507: }
508: }
509: }
510: }
511: &logthis("User $uname at $udom lacks an authentication mechanism");
512: return 'no_host';
513: }
514:
1.1 albertel 515: # --------- Try to authenticate user from domain's lib servers (first this one)
1.11 www 516:
1.1 albertel 517: sub authenticate {
518: my ($uname,$upass,$udom)=@_;
1.12 www 519: $upass=escape($upass);
1.199 www 520: $uname=~s/\W//g;
1.1 albertel 521: if (($perlvar{'lonRole'} eq 'library') &&
522: ($udom eq $perlvar{'lonDefDomain'})) {
1.3 www 523: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
1.2 www 524: if ($answer =~ /authorized/) {
1.9 www 525: if ($answer eq 'authorized') {
526: &logthis("User $uname at $udom authorized by local server");
527: return $perlvar{'lonHostID'};
528: }
529: if ($answer eq 'non_authorized') {
530: &logthis("User $uname at $udom rejected by local server");
531: return 'no_host';
532: }
1.2 www 533: }
1.1 albertel 534: }
535:
536: my $tryserver;
537: foreach $tryserver (keys %libserv) {
538: if ($hostdom{$tryserver} eq $udom) {
1.10 www 539: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
1.1 albertel 540: if ($answer =~ /authorized/) {
1.9 www 541: if ($answer eq 'authorized') {
542: &logthis("User $uname at $udom authorized by $tryserver");
543: return $tryserver;
544: }
545: if ($answer eq 'non_authorized') {
546: &logthis("User $uname at $udom rejected by $tryserver");
547: return 'no_host';
548: }
1.1 albertel 549: }
550: }
1.9 www 551: }
552: &logthis("User $uname at $udom could not be authenticated");
1.1 albertel 553: return 'no_host';
554: }
555:
556: # ---------------------- Find the homebase for a user from domain's lib servers
1.11 www 557:
1.1 albertel 558: sub homeserver {
1.230 stredwic 559: my ($uname,$udom,$ignoreBadCache)=@_;
1.1 albertel 560: my $index="$uname:$udom";
1.221 matthew 561: if ($homecache{$index}) {
562: return "$homecache{$index}";
563: }
1.1 albertel 564: my $tryserver;
565: foreach $tryserver (keys %libserv) {
1.230 stredwic 566: next if ($ignoreBadCache ne 'true' &&
1.231 stredwic 567: exists($badServerCache{$tryserver}));
1.1 albertel 568: if ($hostdom{$tryserver} eq $udom) {
569: my $answer=reply("home:$udom:$uname",$tryserver);
570: if ($answer eq 'found') {
1.221 matthew 571: $homecache{$index}=$tryserver;
1.1 albertel 572: return $tryserver;
1.231 stredwic 573: } elsif ($answer eq 'no_host') {
574: $badServerCache{$tryserver}=1;
1.221 matthew 575: }
1.1 albertel 576: }
577: }
578: return 'no_host';
1.70 www 579: }
580:
581: # ------------------------------------- Find the usernames behind a list of IDs
582:
583: sub idget {
584: my ($udom,@ids)=@_;
585: my %returnhash=();
586:
587: my $tryserver;
588: foreach $tryserver (keys %libserv) {
589: if ($hostdom{$tryserver} eq $udom) {
590: my $idlist=join('&',@ids);
591: $idlist=~tr/A-Z/a-z/;
592: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
593: my @answer=();
1.76 www 594: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
1.70 www 595: @answer=split(/\&/,$reply);
596: } ;
597: my $i;
598: for ($i=0;$i<=$#ids;$i++) {
599: if ($answer[$i]) {
600: $returnhash{$ids[$i]}=$answer[$i];
601: }
602: }
603: }
604: }
605: return %returnhash;
606: }
607:
608: # ------------------------------------- Find the IDs behind a list of usernames
609:
610: sub idrget {
611: my ($udom,@unames)=@_;
612: my %returnhash=();
1.191 harris41 613: foreach (@unames) {
1.70 www 614: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
1.191 harris41 615: }
1.70 www 616: return %returnhash;
617: }
618:
619: # ------------------------------- Store away a list of names and associated IDs
620:
621: sub idput {
622: my ($udom,%ids)=@_;
623: my %servers=();
1.191 harris41 624: foreach (keys %ids) {
1.70 www 625: my $uhom=&homeserver($_,$udom);
626: if ($uhom ne 'no_host') {
627: my $id=&escape($ids{$_});
628: $id=~tr/A-Z/a-z/;
629: my $unam=&escape($_);
630: if ($servers{$uhom}) {
631: $servers{$uhom}.='&'.$id.'='.$unam;
632: } else {
633: $servers{$uhom}=$id.'='.$unam;
634: }
635: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
636: }
1.191 harris41 637: }
638: foreach (keys %servers) {
1.70 www 639: &critical('idput:'.$udom.':'.$servers{$_},$_);
1.191 harris41 640: }
1.344 www 641: }
642:
643: # --------------------------------------------------- Assign a key to a student
644:
645: sub assign_access_key {
1.364 www 646: #
647: # a valid key looks like uname:udom#comments
648: # comments are being appended
649: #
650: my ($ckey,$cdom,$cnum,$udom,$uname,$logentry)=@_;
1.344 www 651: $cdom=
652: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
653: $cnum=
654: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
655: $udom=$ENV{'user.name'} unless (defined($udom));
656: $uname=$ENV{'user.domain'} unless (defined($uname));
1.345 www 657: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
1.364 www 658: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
659: ($existing{$ckey}=~/^$uname\:$udom\#(.*)$/)) {
660: # assigned to this person
661: # - this should not happen,
1.345 www 662: # unless something went wrong
663: # the first time around
664: # ready to assign
1.364 www 665: $logentry=$1.'; '.$logentry;
666: if (&put('accesskey',{$ckey=>$uname.':'.$udom.'#'.$logentry},
667: $cdom,$cnum) eq 'ok') {
1.345 www 668: # key now belongs to user
1.346 www 669: my $envkey='key.'.$cdom.'_'.$cnum;
1.345 www 670: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
671: &appenv('environment.'.$envkey => $ckey);
672: return 'ok';
673: } else {
674: return
675: 'error: Count not permanently assign key, will need to be re-entered later.';
676: }
677: } else {
678: return 'error: Could not assign key, try again later.';
679: }
1.364 www 680: } elsif (!$existing{$ckey}) {
1.345 www 681: # the key does not exist
682: return 'error: The key does not exist';
683: } else {
684: # the key is somebody else's
685: return 'error: The key is already in use';
686: }
1.344 www 687: }
688:
1.364 www 689: # ------------------------------------------ put an additional comment on a key
690:
691: sub comment_access_key {
692: #
693: # a valid key looks like uname:udom#comments
694: # comments are being appended
695: #
696: my ($ckey,$cdom,$cnum,$logentry)=@_;
697: $cdom=
698: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
699: $cnum=
700: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
701: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
702: if ($existing{$ckey}) {
703: $existing{$ckey}.='; '.$logentry;
704: # ready to assign
1.367 www 705: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
1.364 www 706: $cdom,$cnum) eq 'ok') {
707: return 'ok';
708: } else {
709: return 'error: Count not store comment.';
710: }
711: } else {
712: # the key does not exist
713: return 'error: The key does not exist';
714: }
715: }
716:
1.344 www 717: # ------------------------------------------------------ Generate a set of keys
718:
719: sub generate_access_keys {
1.364 www 720: my ($number,$cdom,$cnum,$logentry)=@_;
1.344 www 721: $cdom=
722: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
723: $cnum=
724: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
1.361 www 725: unless (&allowed('mky',$cdom)) { return 0; }
1.344 www 726: unless (($cdom) && ($cnum)) { return 0; }
727: if ($number>10000) { return 0; }
728: sleep(2); # make sure don't get same seed twice
729: srand(time()^($$+($$<<15))); # from "Programming Perl"
730: my $total=0;
731: for (my $i=1;$i<=$number;$i++) {
732: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
733: sprintf("%lx",int(100000*rand)).'-'.
734: sprintf("%lx",int(100000*rand));
735: $newkey=~s/1/g/g; # folks mix up 1 and l
736: $newkey=~s/0/h/g; # and also 0 and O
737: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
738: if ($existing{$newkey}) {
739: $i--;
740: } else {
1.364 www 741: if (&put('accesskeys',
742: { $newkey => '# generated '.localtime().
743: ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
744: '; '.$logentry },
745: $cdom,$cnum) eq 'ok') {
1.344 www 746: $total++;
747: }
748: }
749: }
750: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
751: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
752: return $total;
753: }
754:
755: # ------------------------------------------------------- Validate an accesskey
756:
757: sub validate_access_key {
758: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
759: $cdom=
760: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
761: $cnum=
762: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
763: $udom=$ENV{'user.name'} unless (defined($udom));
764: $uname=$ENV{'user.domain'} unless (defined($uname));
1.345 www 765: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
1.364 www 766: return ($existing{$ckey}=~/^$uname\:$udom\#/);
1.70 www 767: }
768:
769: # ------------------------------------- Find the section of student in a course
1.298 matthew 770:
771: sub getsection {
772: my ($udom,$unam,$courseid)=@_;
773: $courseid=~s/\_/\//g;
774: $courseid=~s/^(\w)/\/$1/;
775: my %Pending;
776: my %Expired;
777: #
778: # Each role can either have not started yet (pending), be active,
779: # or have expired.
780: #
781: # If there is an active role, we are done.
782: #
783: # If there is more than one role which has not started yet,
784: # choose the one which will start sooner
785: # If there is one role which has not started yet, return it.
786: #
787: # If there is more than one expired role, choose the one which ended last.
788: # If there is a role which has expired, return it.
789: #
790: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
791: &homeserver($unam,$udom)))) {
792: my ($key,$value)=split(/\=/,$_);
793: $key=&unescape($key);
794: next if ($key !~/^$courseid(?:\/)*(\w+)*\_st$/);
795: my $section=$1;
796: if ($key eq $courseid.'_st') { $section=''; }
797: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
798: my $now=time;
799: if (defined($end) && ($now > $end)) {
800: $Expired{$end}=$section;
801: next;
802: }
803: if (defined($start) && ($now < $start)) {
804: $Pending{$start}=$section;
805: next;
806: }
807: return $section;
808: }
809: #
810: # Presumedly there will be few matching roles from the above
811: # loop and the sorting time will be negligible.
812: if (scalar(keys(%Pending))) {
813: my ($time) = sort {$a <=> $b} keys(%Pending);
814: return $Pending{$time};
815: }
816: if (scalar(keys(%Expired))) {
817: my @sorted = sort {$a <=> $b} keys(%Expired);
818: my $time = pop(@sorted);
819: return $Expired{$time};
820: }
821: return '-1';
822: }
1.70 www 823:
824: sub usection {
825: my ($udom,$unam,$courseid)=@_;
826: $courseid=~s/\_/\//g;
827: $courseid=~s/^(\w)/\/$1/;
1.191 harris41 828: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
829: &homeserver($unam,$udom)))) {
1.70 www 830: my ($key,$value)=split(/\=/,$_);
831: $key=&unescape($key);
832: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
833: my $section=$1;
834: if ($key eq $courseid.'_st') { $section=''; }
835: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
836: my $now=time;
837: my $notactive=0;
838: if ($start) {
839: if ($now<$start) { $notactive=1; }
840: }
841: if ($end) {
842: if ($now>$end) { $notactive=1; }
843: }
844: unless ($notactive) { return $section; }
845: }
1.191 harris41 846: }
1.70 www 847: return '-1';
848: }
849:
850: # ------------------------------------- Read an entry from a user's environment
851:
852: sub userenvironment {
853: my ($udom,$unam,@what)=@_;
854: my %returnhash=();
855: my @answer=split(/\&/,
856: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
857: &homeserver($unam,$udom)));
858: my $i;
859: for ($i=0;$i<=$#what;$i++) {
860: $returnhash{$what[$i]}=&unescape($answer[$i]);
861: }
862: return %returnhash;
1.1 albertel 863: }
864:
1.263 www 865: # -------------------------------------------------------------------- New chat
866:
867: sub chatsend {
868: my ($newentry,$anon)=@_;
869: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
870: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
871: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
872: &reply('chatsend:'.$cdom.':'.$cnum.':'.
873: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
874: &escape($newentry)),$chome);
1.292 www 875: }
876:
877: # ------------------------------------------ Find current version of a resource
878:
879: sub getversion {
880: my $fname=&clutter(shift);
881: unless ($fname=~/^\/res\//) { return -1; }
882: return ¤tversion(&filelocation('',$fname));
883: }
884:
885: sub currentversion {
886: my $fname=shift;
887: my $author=$fname;
888: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
889: my ($udom,$uname)=split(/\//,$author);
890: my $home=homeserver($uname,$udom);
891: if ($home eq 'no_host') {
892: return -1;
893: }
894: my $answer=reply("currentversion:$fname",$home);
895: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
896: return -1;
897: }
898: return $answer;
1.263 www 899: }
900:
1.1 albertel 901: # ----------------------------- Subscribe to a resource, return URL if possible
1.11 www 902:
1.1 albertel 903: sub subscribe {
904: my $fname=shift;
1.312 www 905: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1.1 albertel 906: my $author=$fname;
907: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
908: my ($udom,$uname)=split(/\//,$author);
909: my $home=homeserver($uname,$udom);
1.335 albertel 910: if ($home eq 'no_host') {
911: return 'not_found';
1.1 albertel 912: }
913: my $answer=reply("sub:$fname",$home);
1.64 www 914: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
915: $answer.=' by '.$home;
916: }
1.1 albertel 917: return $answer;
918: }
919:
1.8 www 920: # -------------------------------------------------------------- Replicate file
921:
922: sub repcopy {
923: my $filename=shift;
1.23 www 924: $filename=~s/\/+/\//g;
1.214 www 925: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
1.8 www 926: my $transname="$filename.in.transfer";
1.17 www 927: if ((-e $filename) || (-e $transname)) { return OK; }
1.8 www 928: my $remoteurl=subscribe($filename);
1.64 www 929: if ($remoteurl =~ /^con_lost by/) {
930: &logthis("Subscribe returned $remoteurl: $filename");
1.8 www 931: return HTTP_SERVICE_UNAVAILABLE;
932: } elsif ($remoteurl eq 'not_found') {
933: &logthis("Subscribe returned not_found: $filename");
934: return HTTP_NOT_FOUND;
1.64 www 935: } elsif ($remoteurl =~ /^rejected by/) {
936: &logthis("Subscribe returned $remoteurl: $filename");
1.8 www 937: return FORBIDDEN;
1.20 www 938: } elsif ($remoteurl eq 'directory') {
939: return OK;
1.8 www 940: } else {
1.290 www 941: my $author=$filename;
942: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
943: my ($udom,$uname)=split(/\//,$author);
944: my $home=homeserver($uname,$udom);
945: unless ($home eq $perlvar{'lonHostID'}) {
1.8 www 946: my @parts=split(/\//,$filename);
947: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
948: if ($path ne "$perlvar{'lonDocRoot'}/res") {
949: &logthis("Malconfiguration for replication: $filename");
950: return HTTP_BAD_REQUEST;
951: }
952: my $count;
953: for ($count=5;$count<$#parts;$count++) {
954: $path.="/$parts[$count]";
955: if ((-e $path)!=1) {
956: mkdir($path,0777);
957: }
958: }
959: my $ua=new LWP::UserAgent;
960: my $request=new HTTP::Request('GET',"$remoteurl");
961: my $response=$ua->request($request,$transname);
962: if ($response->is_error()) {
963: unlink($transname);
964: my $message=$response->status_line;
1.12 www 965: &logthis("<font color=blue>WARNING:"
966: ." LWP get: $message: $filename</font>");
1.8 www 967: return HTTP_SERVICE_UNAVAILABLE;
968: } else {
1.16 www 969: if ($remoteurl!~/\.meta$/) {
970: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
971: my $mresponse=$ua->request($mrequest,$filename.'.meta');
972: if ($mresponse->is_error()) {
973: unlink($filename.'.meta');
974: &logthis(
975: "<font color=yellow>INFO: No metadata: $filename</font>");
976: }
977: }
1.8 www 978: rename($transname,$filename);
979: return OK;
980: }
1.290 www 981: }
1.8 www 982: }
1.330 www 983: }
984:
985: # ------------------------------------------------ Get server side include body
986: sub ssi_body {
1.381 albertel 987: my ($filelink,%form)=@_;
1.330 www 988: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1.381 albertel 989: &ssi($filelink,%form));
1.330 www 990: $output=~s/^.*\<body[^\>]*\>//si;
991: $output=~s/\<\/body\s*\>.*$//si;
1.331 www 992: $output=~
993: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
1.330 www 994: return $output;
1.8 www 995: }
996:
1.15 www 997: # --------------------------------------------------------- Server Side Include
998:
999: sub ssi {
1000:
1.23 www 1001: my ($fn,%form)=@_;
1.15 www 1002:
1003: my $ua=new LWP::UserAgent;
1.23 www 1004:
1005: my $request;
1006:
1007: if (%form) {
1008: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1.201 albertel 1009: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1.23 www 1010: } else {
1011: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1012: }
1013:
1.15 www 1014: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1015: my $response=$ua->request($request);
1016:
1.324 www 1017: return $response->content;
1018: }
1019:
1020: sub externalssi {
1021: my ($url)=@_;
1022: my $ua=new LWP::UserAgent;
1023: my $request=new HTTP::Request('GET',$url);
1024: my $response=$ua->request($request);
1.15 www 1025: return $response->content;
1026: }
1.254 www 1027:
1028: # ------- Add a token to a remote URI's query string to vouch for access rights
1029:
1030: sub tokenwrapper {
1031: my $uri=shift;
1.259 www 1032: $uri=~s/^http\:\/\/([^\/]+)//;
1033: $uri=~s/^\///;
1034: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
1035: my $token=$1;
1036: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
1037: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
1038: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
1.304 www 1039: (($uri=~/\?/)?'&':'?').'token='.$token.
1040: '&tokenissued='.$perlvar{'lonHostID'};
1.259 www 1041: } else {
1042: return '/adm/notfound.html';
1043: }
1.254 www 1044: }
1045:
1.257 www 1046: # --------------- Take an uploaded file and put it into the userfiles directory
1.259 www 1047: # input: name of form element, coursedoc=1 means this is for the course
1.257 www 1048: # output: url of file in userspace
1049:
1050: sub userfileupload {
1.259 www 1051: my ($formname,$coursedoc)=@_;
1.257 www 1052: my $fname=$ENV{'form.'.$formname.'.filename'};
1.315 www 1053: # Replace Windows backslashes by forward slashes
1.257 www 1054: $fname=~s/\\/\//g;
1.315 www 1055: # Get rid of everything but the actual filename
1.257 www 1056: $fname=~s/^.*\/([^\/]+)$/$1/;
1.315 www 1057: # Replace spaces by underscores
1058: $fname=~s/\s+/\_/g;
1059: # Replace all other weird characters by nothing
1.317 www 1060: $fname=~s/[^\w\.\-]//g;
1.315 www 1061: # See if there is anything left
1.257 www 1062: unless ($fname) { return 'error: no uploaded file'; }
1063: chop($ENV{'form.'.$formname});
1.258 www 1064: # Create the directory if not present
1.259 www 1065: my $docuname='';
1066: my $docudom='';
1067: my $docuhome='';
1068: if ($coursedoc) {
1069: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1070: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1071: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1072: } else {
1073: $docuname=$ENV{'user.name'};
1074: $docudom=$ENV{'user.domain'};
1075: $docuhome=$ENV{'user.home'};
1076: }
1.271 www 1077: return
1078: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1079: }
1080:
1081: sub finishuserfileupload {
1082: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1.259 www 1083: my $path=$docudom.'/'.$docuname.'/';
1.258 www 1084: my $filepath=$perlvar{'lonDocRoot'};
1.259 www 1085: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1.258 www 1086: my $count;
1087: for ($count=4;$count<=$#parts;$count++) {
1088: $filepath.="/$parts[$count]";
1089: if ((-e $filepath)!=1) {
1090: mkdir($filepath,0777);
1091: }
1092: }
1093: # Save the file
1094: {
1095: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
1096: print $fh $ENV{'form.'.$formname};
1097: }
1.259 www 1098: # Notify homeserver to grep it
1099: #
1.295 www 1100:
1101: my $fetchresult=
1102: &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
1103: if ($fetchresult eq 'ok') {
1.259 www 1104: #
1.258 www 1105: # Return the URL to it
1.263 www 1106: return '/uploaded/'.$path.$fname;
1107: } else {
1.295 www 1108: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
1109: ' to host '.$docuhome.': '.$fetchresult);
1.263 www 1110: return '/adm/notfound.html';
1111: }
1.257 www 1112: }
1.15 www 1113:
1.14 www 1114: # ------------------------------------------------------------------------- Log
1115:
1116: sub log {
1117: my ($dom,$nam,$hom,$what)=@_;
1.47 www 1118: return critical("log:$dom:$nam:$what",$hom);
1.157 www 1119: }
1120:
1121: # ------------------------------------------------------------------ Course Log
1.352 www 1122: #
1123: # This routine flushes several buffers of non-mission-critical nature
1124: #
1.157 www 1125:
1126: sub flushcourselogs {
1.352 www 1127: &logthis('Flushing log buffers');
1128: #
1129: # course logs
1130: # This is a log of all transactions in a course, which can be used
1131: # for data mining purposes
1132: #
1133: # It also collects the courseid database, which lists last transaction
1134: # times and course titles for all courseids
1135: #
1136: my %courseidbuffer=();
1.191 harris41 1137: foreach (keys %courselogs) {
1.157 www 1138: my $crsid=$_;
1.352 www 1139: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1.188 www 1140: &escape($courselogs{$crsid}),
1141: $coursehombuf{$crsid}) eq 'ok') {
1.157 www 1142: delete $courselogs{$crsid};
1143: } else {
1144: &logthis('Failed to flush log buffer for '.$crsid);
1145: if (length($courselogs{$crsid})>40000) {
1146: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1147: " exceeded maximum size, deleting.</font>");
1148: delete $courselogs{$crsid};
1149: }
1.352 www 1150: }
1151: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1152: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1153: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1154: } else {
1155: $courseidbuffer{$coursehombuf{$crsid}}=
1156: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1157: }
1.191 harris41 1158: }
1.352 www 1159: #
1160: # Write course id database (reverse lookup) to homeserver of courses
1161: # Is used in pickcourse
1162: #
1163: foreach (keys %courseidbuffer) {
1.353 www 1164: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1.352 www 1165: }
1166: #
1167: # File accesses
1168: # Writes to the dynamic metadata of resources to get hit counts, etc.
1169: #
1.191 harris41 1170: foreach (keys %accesshash) {
1.185 www 1171: my $entry=$_;
1172: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
1173: my %temphash=($entry => $accesshash{$entry});
1.266 albertel 1174: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
1.185 www 1175: delete $accesshash{$entry};
1176: }
1.191 harris41 1177: }
1.352 www 1178: #
1179: # Roles
1180: # Reverse lookup of user roles for course faculty/staff and co-authorship
1181: #
1.349 www 1182: foreach (keys %userrolehash) {
1183: my $entry=$_;
1.351 www 1184: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1.349 www 1185: split(/\:/,$entry);
1186: if (&Apache::lonnet::put('nohist_userroles',
1.351 www 1187: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1.349 www 1188: $rudom,$runame) eq 'ok') {
1189: delete $userrolehash{$entry};
1190: }
1191: }
1.186 www 1192: $dumpcount++;
1.157 www 1193: }
1194:
1195: sub courselog {
1196: my $what=shift;
1.158 www 1197: $what=time.':'.$what;
1.157 www 1198: unless ($ENV{'request.course.id'}) { return ''; }
1.188 www 1199: $coursedombuf{$ENV{'request.course.id'}}=
1.352 www 1200: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1201: $coursenumbuf{$ENV{'request.course.id'}}=
1.188 www 1202: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1203: $coursehombuf{$ENV{'request.course.id'}}=
1204: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1.352 www 1205: $coursedescrbuf{$ENV{'request.course.id'}}=
1206: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1.157 www 1207: if (defined $courselogs{$ENV{'request.course.id'}}) {
1208: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1209: } else {
1210: $courselogs{$ENV{'request.course.id'}}.=$what;
1211: }
1212: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1213: &flushcourselogs();
1214: }
1.158 www 1215: }
1216:
1217: sub courseacclog {
1218: my $fnsymb=shift;
1219: unless ($ENV{'request.course.id'}) { return ''; }
1220: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1.192 www 1221: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
1.187 www 1222: $what.=':POST';
1.191 harris41 1223: foreach (keys %ENV) {
1.158 www 1224: if ($_=~/^form\.(.*)/) {
1225: $what.=':'.$1.'='.$ENV{$_};
1226: }
1.191 harris41 1227: }
1.158 www 1228: }
1229: &courselog($what);
1.149 www 1230: }
1231:
1.185 www 1232: sub countacc {
1233: my $url=&declutter(shift);
1234: unless ($ENV{'request.course.id'}) { return ''; }
1235: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1.281 www 1236: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1.185 www 1237: if (defined($accesshash{$key})) {
1238: $accesshash{$key}++;
1239: } else {
1240: $accesshash{$key}=1;
1241: }
1242: }
1.349 www 1243:
1.361 www 1244: sub linklog {
1245: my ($from,$to)=@_;
1246: $from=&declutter($from);
1247: $to=&declutter($to);
1248: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1249: $accesshash{$to.'___'.$from.'___goto'}=1;
1250: }
1251:
1.349 www 1252: sub userrolelog {
1253: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1254: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1255: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1256: ($trole=~/^cr/)) {
1.350 www 1257: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1258: $userrolehash
1259: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1.349 www 1260: =$tend.':'.$tstart;
1261: }
1.351 www 1262: }
1263:
1264: sub get_course_adv_roles {
1265: my $cid=shift;
1266: $cid=$ENV{'request.course.id'} unless (defined($cid));
1267: my %coursehash=&coursedescription($cid);
1268: my %returnhash=();
1269: my %dumphash=
1270: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1271: my $now=time;
1272: foreach (keys %dumphash) {
1273: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1274: if (($tstart) && ($tstart<0)) { next; }
1275: if (($tend) && ($tend<$now)) { next; }
1276: if (($tstart) && ($now<$tstart)) { next; }
1277: my ($role,$username,$domain,$section)=split(/\:/,$_);
1278: my $key=&plaintext($role);
1279: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1280: if ($returnhash{$key}) {
1281: $returnhash{$key}.=','.$username.':'.$domain;
1282: } else {
1283: $returnhash{$key}=$username.':'.$domain;
1284: }
1.400 www 1285: }
1286: return %returnhash;
1287: }
1288:
1289: sub get_my_roles {
1290: my ($uname,$udom)=@_;
1291: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1292: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1293: my %dumphash=
1294: &dump('nohist_userroles',$udom,$uname);
1295: my %returnhash=();
1296: my $now=time;
1297: foreach (keys %dumphash) {
1298: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1299: if (($tstart) && ($tstart<0)) { next; }
1300: if (($tend) && ($tend<$now)) { next; }
1301: if (($tstart) && ($now<$tstart)) { next; }
1302: my ($role,$username,$domain,$section)=split(/\:/,$_);
1303: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1.373 www 1304: }
1305: return %returnhash;
1.399 www 1306: }
1307:
1308: # ----------------------------------------------------- Frontpage Announcements
1309: #
1310: #
1311:
1312: sub postannounce {
1313: my ($server,$text)=@_;
1314: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1315: unless ($text=~/\w/) { $text=''; }
1316: return &reply('setannounce:'.&escape($text),$server);
1317: }
1318:
1319: sub getannounce {
1320: if (my $fh=Apache::File->new($perlvar{'lonDocRoot'}.'/announcement.txt')) {
1321: my $announcement='';
1322: while (<$fh>) { $announcement .=$_; }
1323: $fh->close();
1324: if ($announcement=~/\w/) {
1325: return
1326: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1327: '<tr><td bgcolor="#FFFFFF"><pre>'.$announcement.'</pre></td></tr></table>';
1328: } else {
1329: return '';
1330: }
1331: } else {
1332: return '';
1333: }
1.351 www 1334: }
1.353 www 1335:
1336: # ---------------------------------------------------------- Course ID routines
1337: # Deal with domain's nohist_courseid.db files
1338: #
1339:
1340: sub courseidput {
1341: my ($domain,$what,$coursehome)=@_;
1342: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1343: }
1344:
1345: sub courseiddump {
1346: my ($domfilter,$descfilter,$sincefilter)=@_;
1347: my %returnhash=();
1.355 www 1348: unless ($domfilter) { $domfilter=''; }
1.353 www 1349: foreach my $tryserver (keys %libserv) {
1.355 www 1350: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1.353 www 1351: foreach (
1352: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1.354 www 1353: $sincefilter.':'.&escape($descfilter),
1354: $tryserver))) {
1.353 www 1355: my ($key,$value)=split(/\=/,$_);
1356: if (($key) && ($value)) {
1357: $returnhash{&unescape($key)}=&unescape($value);
1358: }
1359: }
1360:
1361: }
1362: }
1363: return %returnhash;
1364: }
1365:
1366: #
1.149 www 1367: # ----------------------------------------------------------- Check out an item
1368:
1369: sub checkout {
1370: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1371: my $now=time;
1372: my $lonhost=$perlvar{'lonHostID'};
1373: my $infostr=&escape(
1.234 www 1374: 'CHECKOUTTOKEN&'.
1.149 www 1375: $tuname.'&'.
1376: $tudom.'&'.
1377: $tcrsid.'&'.
1378: $symb.'&'.
1379: $now.'&'.$ENV{'REMOTE_ADDR'});
1380: my $token=&reply('tmpput:'.$infostr,$lonhost);
1.151 www 1381: if ($token=~/^error\:/) {
1382: &logthis("<font color=blue>WARNING: ".
1383: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1384: "</font>");
1385: return '';
1386: }
1387:
1.149 www 1388: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1389: $token=~tr/a-z/A-Z/;
1390:
1.153 www 1391: my %infohash=('resource.0.outtoken' => $token,
1392: 'resource.0.checkouttime' => $now,
1393: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1.149 www 1394:
1395: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1396: return '';
1.151 www 1397: } else {
1398: &logthis("<font color=blue>WARNING: ".
1399: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1400: "</font>");
1.149 www 1401: }
1402:
1403: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1404: &escape('Checkout '.$infostr.' - '.
1405: $token)) ne 'ok') {
1406: return '';
1.151 www 1407: } else {
1408: &logthis("<font color=blue>WARNING: ".
1409: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1410: "</font>");
1.149 www 1411: }
1.151 www 1412: return $token;
1.149 www 1413: }
1414:
1415: # ------------------------------------------------------------ Check in an item
1416:
1417: sub checkin {
1418: my $token=shift;
1.150 www 1419: my $now=time;
1420: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1421: $lonhost=~tr/A-Z/a-z/;
1422: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1423: $dtoken=~s/\W/\_/g;
1.234 www 1424: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1.150 www 1425: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1426:
1.154 www 1427: unless (($tuname) && ($tudom)) {
1428: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1429: return '';
1430: }
1431:
1432: unless (&allowed('mgr',$tcrsid)) {
1433: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1434: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1435: return '';
1436: }
1437:
1.153 www 1438: my %infohash=('resource.0.intoken' => $token,
1439: 'resource.0.checkintime' => $now,
1440: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1.150 www 1441:
1442: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1443: return '';
1444: }
1445:
1446: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1447: &escape('Checkin - '.$token)) ne 'ok') {
1448: return '';
1449: }
1450:
1451: return ($symb,$tuname,$tudom,$tcrsid);
1.110 www 1452: }
1453:
1454: # --------------------------------------------- Set Expire Date for Spreadsheet
1455:
1456: sub expirespread {
1457: my ($uname,$udom,$stype,$usymb)=@_;
1458: my $cid=$ENV{'request.course.id'};
1459: if ($cid) {
1460: my $now=time;
1461: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1462: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1463: $ENV{'course.'.$cid.'.num'}.
1464: ':nohist_expirationdates:'.
1465: &escape($key).'='.$now,
1466: $ENV{'course.'.$cid.'.home'})
1467: }
1468: return 'ok';
1.14 www 1469: }
1470:
1.109 www 1471: # ----------------------------------------------------- Devalidate Spreadsheets
1472:
1473: sub devalidate {
1.325 www 1474: my ($symb,$uname,$udom)=@_;
1.109 www 1475: my $cid=$ENV{'request.course.id'};
1476: if ($cid) {
1.391 matthew 1477: # delete the stored spreadsheets for
1478: # - the student level sheet of this user in course's homespace
1479: # - the assessment level sheet for this resource
1480: # for this user in user's homespace
1.325 www 1481: my $key=$uname.':'.$udom.':';
1.109 www 1482: my $status=
1.299 matthew 1483: &del('nohist_calculatedsheets',
1.391 matthew 1484: [$key.'studentcalc:'],
1.133 albertel 1485: $ENV{'course.'.$cid.'.domain'},
1486: $ENV{'course.'.$cid.'.num'})
1487: .' '.
1488: &del('nohist_calculatedsheets_'.$cid,
1.391 matthew 1489: [$key.'assesscalc:'.$symb],$udom,$uname);
1.109 www 1490: unless ($status eq 'ok ok') {
1491: &logthis('Could not devalidate spreadsheet '.
1.325 www 1492: $uname.' at '.$udom.' for '.
1.109 www 1493: $symb.': '.$status);
1.133 albertel 1494: }
1.109 www 1495: }
1496: }
1497:
1.265 albertel 1498: sub get_scalar {
1499: my ($string,$end) = @_;
1500: my $value;
1501: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1502: $value = $1;
1503: } elsif ($$string =~ s/^([^&]*?)&//) {
1504: $value = $1;
1505: }
1506: return &unescape($value);
1507: }
1508:
1509: sub array2str {
1510: my (@array) = @_;
1511: my $result=&arrayref2str(\@array);
1512: $result=~s/^__ARRAY_REF__//;
1513: $result=~s/__END_ARRAY_REF__$//;
1514: return $result;
1515: }
1516:
1.204 albertel 1517: sub arrayref2str {
1518: my ($arrayref) = @_;
1.265 albertel 1519: my $result='__ARRAY_REF__';
1.204 albertel 1520: foreach my $elem (@$arrayref) {
1.265 albertel 1521: if(ref($elem) eq 'ARRAY') {
1522: $result.=&arrayref2str($elem).'&';
1523: } elsif(ref($elem) eq 'HASH') {
1524: $result.=&hashref2str($elem).'&';
1525: } elsif(ref($elem)) {
1526: #print("Got a ref of ".(ref($elem))." skipping.");
1.204 albertel 1527: } else {
1528: $result.=&escape($elem).'&';
1529: }
1530: }
1531: $result=~s/\&$//;
1.265 albertel 1532: $result .= '__END_ARRAY_REF__';
1.204 albertel 1533: return $result;
1534: }
1535:
1.168 albertel 1536: sub hash2str {
1.204 albertel 1537: my (%hash) = @_;
1538: my $result=&hashref2str(\%hash);
1.265 albertel 1539: $result=~s/^__HASH_REF__//;
1540: $result=~s/__END_HASH_REF__$//;
1.204 albertel 1541: return $result;
1542: }
1543:
1544: sub hashref2str {
1545: my ($hashref)=@_;
1.265 albertel 1546: my $result='__HASH_REF__';
1.204 albertel 1547: foreach (keys(%$hashref)) {
1548: if (ref($_) eq 'ARRAY') {
1.265 albertel 1549: $result.=&arrayref2str($_).'=';
1.204 albertel 1550: } elsif (ref($_) eq 'HASH') {
1.265 albertel 1551: $result.=&hashref2str($_).'=';
1.204 albertel 1552: } elsif (ref($_)) {
1.265 albertel 1553: $result.='=';
1554: #print("Got a ref of ".(ref($_))." skipping.");
1.204 albertel 1555: } else {
1.265 albertel 1556: if ($_) {$result.=&escape($_).'=';} else { last; }
1.204 albertel 1557: }
1558:
1.265 albertel 1559: if(ref($hashref->{$_}) eq 'ARRAY') {
1560: $result.=&arrayref2str($hashref->{$_}).'&';
1561: } elsif(ref($hashref->{$_}) eq 'HASH') {
1562: $result.=&hashref2str($hashref->{$_}).'&';
1563: } elsif(ref($hashref->{$_})) {
1564: $result.='&';
1565: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1.204 albertel 1566: } else {
1.265 albertel 1567: $result.=&escape($hashref->{$_}).'&';
1.204 albertel 1568: }
1569: }
1.168 albertel 1570: $result=~s/\&$//;
1.265 albertel 1571: $result .= '__END_HASH_REF__';
1.168 albertel 1572: return $result;
1573: }
1574:
1575: sub str2hash {
1.265 albertel 1576: my ($string)=@_;
1577: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1578: return %$hash;
1579: }
1580:
1581: sub str2hashref {
1.168 albertel 1582: my ($string) = @_;
1.265 albertel 1583:
1584: my %hash;
1585:
1586: if($string !~ /^__HASH_REF__/) {
1587: if (! ($string eq '' || !defined($string))) {
1588: $hash{'error'}='Not hash reference';
1589: }
1590: return (\%hash, $string);
1591: }
1592:
1593: $string =~ s/^__HASH_REF__//;
1594:
1595: while($string !~ /^__END_HASH_REF__/) {
1596: #key
1597: my $key='';
1598: if($string =~ /^__HASH_REF__/) {
1599: ($key, $string)=&str2hashref($string);
1600: if(defined($key->{'error'})) {
1601: $hash{'error'}='Bad data';
1602: return (\%hash, $string);
1603: }
1604: } elsif($string =~ /^__ARRAY_REF__/) {
1605: ($key, $string)=&str2arrayref($string);
1606: if($key->[0] eq 'Array reference error') {
1607: $hash{'error'}='Bad data';
1608: return (\%hash, $string);
1609: }
1610: } else {
1611: $string =~ s/^(.*?)=//;
1.267 albertel 1612: $key=&unescape($1);
1.265 albertel 1613: }
1614: $string =~ s/^=//;
1615:
1616: #value
1617: my $value='';
1618: if($string =~ /^__HASH_REF__/) {
1619: ($value, $string)=&str2hashref($string);
1620: if(defined($value->{'error'})) {
1621: $hash{'error'}='Bad data';
1622: return (\%hash, $string);
1623: }
1624: } elsif($string =~ /^__ARRAY_REF__/) {
1625: ($value, $string)=&str2arrayref($string);
1626: if($value->[0] eq 'Array reference error') {
1627: $hash{'error'}='Bad data';
1628: return (\%hash, $string);
1629: }
1630: } else {
1631: $value=&get_scalar(\$string,'__END_HASH_REF__');
1632: }
1633: $string =~ s/^&//;
1634:
1635: $hash{$key}=$value;
1.204 albertel 1636: }
1.265 albertel 1637:
1638: $string =~ s/^__END_HASH_REF__//;
1639:
1640: return (\%hash, $string);
1.204 albertel 1641: }
1642:
1643: sub str2array {
1.265 albertel 1644: my ($string)=@_;
1645: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1646: return @$array;
1647: }
1648:
1649: sub str2arrayref {
1.204 albertel 1650: my ($string) = @_;
1.265 albertel 1651: my @array;
1652:
1653: if($string !~ /^__ARRAY_REF__/) {
1654: if (! ($string eq '' || !defined($string))) {
1655: $array[0]='Array reference error';
1656: }
1657: return (\@array, $string);
1658: }
1659:
1660: $string =~ s/^__ARRAY_REF__//;
1661:
1662: while($string !~ /^__END_ARRAY_REF__/) {
1663: my $value='';
1664: if($string =~ /^__HASH_REF__/) {
1665: ($value, $string)=&str2hashref($string);
1666: if(defined($value->{'error'})) {
1667: $array[0] ='Array reference error';
1668: return (\@array, $string);
1669: }
1670: } elsif($string =~ /^__ARRAY_REF__/) {
1671: ($value, $string)=&str2arrayref($string);
1672: if($value->[0] eq 'Array reference error') {
1673: $array[0] ='Array reference error';
1674: return (\@array, $string);
1675: }
1676: } else {
1677: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1678: }
1679: $string =~ s/^&//;
1680:
1681: push(@array, $value);
1.191 harris41 1682: }
1.265 albertel 1683:
1684: $string =~ s/^__END_ARRAY_REF__//;
1685:
1686: return (\@array, $string);
1.168 albertel 1687: }
1688:
1.167 albertel 1689: # -------------------------------------------------------------------Temp Store
1690:
1.168 albertel 1691: sub tmpreset {
1692: my ($symb,$namespace,$domain,$stuname) = @_;
1693: if (!$symb) {
1694: $symb=&symbread();
1.380 albertel 1695: if (!$symb) { $symb= $ENV{'request.url'}; }
1.168 albertel 1696: }
1697: $symb=escape($symb);
1698:
1699: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1700: $namespace=~s/\//\_/g;
1701: $namespace=~s/\W//g;
1702:
1703: #FIXME needs to do something for /pub resources
1704: if (!$domain) { $domain=$ENV{'user.domain'}; }
1705: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1706: my $path=$perlvar{'lonDaemons'}.'/tmp';
1707: my %hash;
1708: if (tie(%hash,'GDBM_File',
1709: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1.256 albertel 1710: &GDBM_WRCREAT(),0640)) {
1.168 albertel 1711: foreach my $key (keys %hash) {
1.180 albertel 1712: if ($key=~ /:$symb/) {
1.168 albertel 1713: delete($hash{$key});
1714: }
1715: }
1716: }
1717: }
1718:
1.167 albertel 1719: sub tmpstore {
1.168 albertel 1720: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1721:
1722: if (!$symb) {
1723: $symb=&symbread();
1724: if (!$symb) { $symb= $ENV{'request.url'}; }
1725: }
1726: $symb=escape($symb);
1727:
1728: if (!$namespace) {
1729: # I don't think we would ever want to store this for a course.
1730: # it seems this will only be used if we don't have a course.
1731: #$namespace=$ENV{'request.course.id'};
1732: #if (!$namespace) {
1733: $namespace=$ENV{'request.state'};
1734: #}
1735: }
1736: $namespace=~s/\//\_/g;
1737: $namespace=~s/\W//g;
1738: #FIXME needs to do something for /pub resources
1739: if (!$domain) { $domain=$ENV{'user.domain'}; }
1740: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1741: my $now=time;
1742: my %hash;
1743: my $path=$perlvar{'lonDaemons'}.'/tmp';
1744: if (tie(%hash,'GDBM_File',
1745: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1.256 albertel 1746: &GDBM_WRCREAT(),0640)) {
1.168 albertel 1747: $hash{"version:$symb"}++;
1748: my $version=$hash{"version:$symb"};
1749: my $allkeys='';
1750: foreach my $key (keys(%$storehash)) {
1751: $allkeys.=$key.':';
1752: $hash{"$version:$symb:$key"}=$$storehash{$key};
1753: }
1754: $hash{"$version:$symb:timestamp"}=$now;
1755: $allkeys.='timestamp';
1756: $hash{"$version:keys:$symb"}=$allkeys;
1757: if (untie(%hash)) {
1758: return 'ok';
1759: } else {
1760: return "error:$!";
1761: }
1762: } else {
1763: return "error:$!";
1764: }
1765: }
1.167 albertel 1766:
1.168 albertel 1767: # -----------------------------------------------------------------Temp Restore
1.167 albertel 1768:
1.168 albertel 1769: sub tmprestore {
1770: my ($symb,$namespace,$domain,$stuname) = @_;
1.167 albertel 1771:
1.168 albertel 1772: if (!$symb) {
1773: $symb=&symbread();
1774: if (!$symb) { $symb= $ENV{'request.url'}; }
1775: }
1776: $symb=escape($symb);
1777:
1778: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1779: #FIXME needs to do something for /pub resources
1780: if (!$domain) { $domain=$ENV{'user.domain'}; }
1781: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1782:
1783: my %returnhash;
1784: $namespace=~s/\//\_/g;
1785: $namespace=~s/\W//g;
1786: my %hash;
1787: my $path=$perlvar{'lonDaemons'}.'/tmp';
1788: if (tie(%hash,'GDBM_File',
1789: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1.256 albertel 1790: &GDBM_READER(),0640)) {
1.168 albertel 1791: my $version=$hash{"version:$symb"};
1792: $returnhash{'version'}=$version;
1793: my $scope;
1794: for ($scope=1;$scope<=$version;$scope++) {
1795: my $vkeys=$hash{"$scope:keys:$symb"};
1796: my @keys=split(/:/,$vkeys);
1797: my $key;
1798: $returnhash{"$scope:keys"}=$vkeys;
1799: foreach $key (@keys) {
1800: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1801: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1.167 albertel 1802: }
1803: }
1.168 albertel 1804: if (!(untie(%hash))) {
1805: return "error:$!";
1806: }
1807: } else {
1808: return "error:$!";
1809: }
1810: return %returnhash;
1.167 albertel 1811: }
1812:
1.9 www 1813: # ----------------------------------------------------------------------- Store
1814:
1815: sub store {
1.124 www 1816: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1817: my $home='';
1818:
1.168 albertel 1819: if ($stuname) { $home=&homeserver($stuname,$domain); }
1.124 www 1820:
1.213 www 1821: $symb=&symbclean($symb);
1.122 albertel 1822: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1.109 www 1823:
1.325 www 1824: if (!$domain) { $domain=$ENV{'user.domain'}; }
1825: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1826:
1827: &devalidate($symb,$stuname,$domain);
1.109 www 1828:
1829: $symb=escape($symb);
1.187 www 1830: if (!$namespace) {
1831: unless ($namespace=$ENV{'request.course.id'}) {
1832: return '';
1833: }
1834: }
1.122 albertel 1835: if (!$home) { $home=$ENV{'user.home'}; }
1.12 www 1836: my $namevalue='';
1.191 harris41 1837: foreach (keys %$storehash) {
1.122 albertel 1838: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1.191 harris41 1839: }
1.12 www 1840: $namevalue=~s/\&$//;
1.187 www 1841: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1.124 www 1842: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1.9 www 1843: }
1844:
1.47 www 1845: # -------------------------------------------------------------- Critical Store
1846:
1847: sub cstore {
1.124 www 1848: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1849: my $home='';
1850:
1.168 albertel 1851: if ($stuname) { $home=&homeserver($stuname,$domain); }
1.124 www 1852:
1.213 www 1853: $symb=&symbclean($symb);
1.122 albertel 1854: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1.109 www 1855:
1.325 www 1856: if (!$domain) { $domain=$ENV{'user.domain'}; }
1857: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1858:
1859: &devalidate($symb,$stuname,$domain);
1.109 www 1860:
1861: $symb=escape($symb);
1.187 www 1862: if (!$namespace) {
1863: unless ($namespace=$ENV{'request.course.id'}) {
1864: return '';
1865: }
1866: }
1.122 albertel 1867: if (!$home) { $home=$ENV{'user.home'}; }
1868:
1.47 www 1869: my $namevalue='';
1.191 harris41 1870: foreach (keys %$storehash) {
1.122 albertel 1871: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1.191 harris41 1872: }
1.47 www 1873: $namevalue=~s/\&$//;
1.187 www 1874: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1.188 www 1875: return critical
1876: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1.47 www 1877: }
1878:
1.9 www 1879: # --------------------------------------------------------------------- Restore
1880:
1881: sub restore {
1.124 www 1882: my ($symb,$namespace,$domain,$stuname) = @_;
1883: my $home='';
1884:
1.168 albertel 1885: if ($stuname) { $home=&homeserver($stuname,$domain); }
1.124 www 1886:
1.122 albertel 1887: if (!$symb) {
1888: unless ($symb=escape(&symbread())) { return ''; }
1889: } else {
1.213 www 1890: $symb=&escape(&symbclean($symb));
1.122 albertel 1891: }
1.188 www 1892: if (!$namespace) {
1893: unless ($namespace=$ENV{'request.course.id'}) {
1894: return '';
1895: }
1896: }
1.122 albertel 1897: if (!$domain) { $domain=$ENV{'user.domain'}; }
1898: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1899: if (!$home) { $home=$ENV{'user.home'}; }
1900: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1901:
1.12 www 1902: my %returnhash=();
1.191 harris41 1903: foreach (split(/\&/,$answer)) {
1.12 www 1904: my ($name,$value)=split(/\=/,$_);
1905: $returnhash{&unescape($name)}=&unescape($value);
1.191 harris41 1906: }
1.75 www 1907: my $version;
1908: for ($version=1;$version<=$returnhash{'version'};$version++) {
1.191 harris41 1909: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1.75 www 1910: $returnhash{$_}=$returnhash{$version.':'.$_};
1.191 harris41 1911: }
1.75 www 1912: }
1.13 www 1913: return %returnhash;
1.34 www 1914: }
1915:
1916: # ---------------------------------------------------------- Course Description
1917:
1918: sub coursedescription {
1919: my $courseid=shift;
1920: $courseid=~s/^\///;
1.49 www 1921: $courseid=~s/\_/\//g;
1.34 www 1922: my ($cdomain,$cnum)=split(/\//,$courseid);
1.129 albertel 1923: my $chome=&homeserver($cnum,$cdomain);
1.302 albertel 1924: my $normalid=$cdomain.'_'.$cnum;
1925: # need to always cache even if we get errors otherwise we keep
1926: # trying and trying and trying to get the course description.
1927: my %envhash=();
1928: my %returnhash=();
1929: $envhash{'course.'.$normalid.'.last_cache'}=time;
1.34 www 1930: if ($chome ne 'no_host') {
1.302 albertel 1931: %returnhash=&dump('environment',$cdomain,$cnum);
1.129 albertel 1932: if (!exists($returnhash{'con_lost'})) {
1933: $returnhash{'home'}= $chome;
1934: $returnhash{'domain'} = $cdomain;
1935: $returnhash{'num'} = $cnum;
1.130 albertel 1936: while (my ($name,$value) = each %returnhash) {
1.53 www 1937: $envhash{'course.'.$normalid.'.'.$name}=$value;
1.129 albertel 1938: }
1.270 www 1939: $returnhash{'url'}=&clutter($returnhash{'url'});
1.34 www 1940: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1.38 www 1941: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1.60 www 1942: $envhash{'course.'.$normalid.'.home'}=$chome;
1943: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1944: $envhash{'course.'.$normalid.'.num'}=$cnum;
1.34 www 1945: }
1946: }
1.302 albertel 1947: &appenv(%envhash);
1948: return %returnhash;
1.9 www 1949: }
1.1 albertel 1950:
1.103 harris41 1951: # -------------------------------------------------------- Get user privileges
1.11 www 1952:
1953: sub rolesinit {
1954: my ($domain,$username,$authhost)=@_;
1955: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1.12 www 1956: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1.11 www 1957: my %allroles=();
1958: my %thesepriv=();
1959: my $now=time;
1.21 www 1960: my $userroles="user.login.time=$now\n";
1.11 www 1961: my $thesestr;
1962:
1963: if ($rolesdump ne '') {
1.191 harris41 1964: foreach (split(/&/,$rolesdump)) {
1.21 www 1965: if ($_!~/^rolesdef\&/) {
1.11 www 1966: my ($area,$role)=split(/=/,$_);
1.21 www 1967: $area=~s/\_\w\w$//;
1.11 www 1968: my ($trole,$tend,$tstart)=split(/_/,$role);
1.21 www 1969: $userroles.='user.role.'.$trole.'.'.$area.'='.
1970: $tstart.'.'.$tend."\n";
1.349 www 1971: # log the associated role with the area
1972: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
1.11 www 1973: if ($tend!=0) {
1974: if ($tend<$now) {
1975: $trole='';
1976: }
1977: }
1978: if ($tstart!=0) {
1979: if ($tstart>$now) {
1980: $trole='';
1981: }
1982: }
1983: if (($area ne '') && ($trole ne '')) {
1.347 albertel 1984: my $spec=$trole.'.'.$area;
1985: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1986: if ($trole =~ /^cr\//) {
1987: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1.392 www 1988: my $homsvr=homeserver($rauthor,$rdomain);
1.347 albertel 1989: if ($hostname{$homsvr} ne '') {
1.392 www 1990: my ($rdummy,$roledef)=
1991: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
1992:
1993: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
1.347 albertel 1994: my ($syspriv,$dompriv,$coursepriv)=
1.392 www 1995: split(/\_/,$roledef);
1.347 albertel 1996: if (defined($syspriv)) {
1997: $allroles{'cm./'}.=':'.$syspriv;
1998: $allroles{$spec.'./'}.=':'.$syspriv;
1999: }
2000: if ($tdomain ne '') {
2001: if (defined($dompriv)) {
2002: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2003: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2004: }
2005: if ($trest ne '') {
2006: if (defined($coursepriv)) {
2007: $allroles{'cm.'.$area}.=':'.$coursepriv;
2008: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
2009: }
2010: }
2011: }
2012: }
2013: }
2014: } else {
2015: if (defined($pr{$trole.':s'})) {
2016: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
2017: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2018: }
2019: if ($tdomain ne '') {
2020: if (defined($pr{$trole.':d'})) {
2021: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2022: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2023: }
2024: if ($trest ne '') {
2025: if (defined($pr{$trole.':c'})) {
2026: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2027: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2028: }
2029: }
2030: }
2031: }
1.12 www 2032: }
2033: }
1.191 harris41 2034: }
1.125 www 2035: my $adv=0;
1.128 www 2036: my $author=0;
1.191 harris41 2037: foreach (keys %allroles) {
1.11 www 2038: %thesepriv=();
1.146 www 2039: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1.128 www 2040: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1.191 harris41 2041: foreach (split(/:/,$allroles{$_})) {
1.11 www 2042: if ($_ ne '') {
1.103 harris41 2043: my ($privilege,$restrictions)=split(/&/,$_);
1.11 www 2044: if ($restrictions eq '') {
1.103 harris41 2045: $thesepriv{$privilege}='F';
1.11 www 2046: } else {
1.103 harris41 2047: if ($thesepriv{$privilege} ne 'F') {
2048: $thesepriv{$privilege}.=$restrictions;
1.11 www 2049: }
2050: }
2051: }
1.191 harris41 2052: }
1.11 www 2053: $thesestr='';
1.191 harris41 2054: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1.11 www 2055: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1.191 harris41 2056: }
1.128 www 2057: $userroles.='user.adv='.$adv."\n".
2058: 'user.author='.$author."\n";
1.126 www 2059: $ENV{'user.adv'}=$adv;
1.11 www 2060: }
2061: return $userroles;
2062: }
2063:
1.12 www 2064: # --------------------------------------------------------------- get interface
2065:
2066: sub get {
1.131 albertel 2067: my ($namespace,$storearr,$udomain,$uname)=@_;
1.12 www 2068: my $items='';
1.191 harris41 2069: foreach (@$storearr) {
1.12 www 2070: $items.=escape($_).'&';
1.191 harris41 2071: }
1.12 www 2072: $items=~s/\&$//;
1.131 albertel 2073: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2074: if (!$uname) { $uname=$ENV{'user.name'}; }
2075: my $uhome=&homeserver($uname,$udomain);
2076:
1.133 albertel 2077: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1.15 www 2078: my @pairs=split(/\&/,$rep);
1.273 albertel 2079: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2080: return @pairs;
2081: }
1.15 www 2082: my %returnhash=();
1.42 www 2083: my $i=0;
1.191 harris41 2084: foreach (@$storearr) {
1.42 www 2085: $returnhash{$_}=unescape($pairs[$i]);
2086: $i++;
1.191 harris41 2087: }
1.15 www 2088: return %returnhash;
1.27 www 2089: }
2090:
2091: # --------------------------------------------------------------- del interface
2092:
2093: sub del {
1.133 albertel 2094: my ($namespace,$storearr,$udomain,$uname)=@_;
1.27 www 2095: my $items='';
1.191 harris41 2096: foreach (@$storearr) {
1.27 www 2097: $items.=escape($_).'&';
1.191 harris41 2098: }
1.27 www 2099: $items=~s/\&$//;
1.133 albertel 2100: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2101: if (!$uname) { $uname=$ENV{'user.name'}; }
2102: my $uhome=&homeserver($uname,$udomain);
2103:
2104: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1.15 www 2105: }
2106:
2107: # -------------------------------------------------------------- dump interface
2108:
2109: sub dump {
1.193 www 2110: my ($namespace,$udomain,$uname,$regexp)=@_;
1.129 albertel 2111: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2112: if (!$uname) { $uname=$ENV{'user.name'}; }
2113: my $uhome=&homeserver($uname,$udomain);
1.193 www 2114: if ($regexp) {
2115: $regexp=&escape($regexp);
2116: } else {
2117: $regexp='.';
2118: }
2119: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1.12 www 2120: my @pairs=split(/\&/,$rep);
2121: my %returnhash=();
1.191 harris41 2122: foreach (@pairs) {
1.12 www 2123: my ($key,$value)=split(/=/,$_);
1.29 www 2124: $returnhash{unescape($key)}=unescape($value);
1.318 matthew 2125: }
2126: return %returnhash;
2127: }
2128:
1.319 matthew 2129: # --------------------------------------------------------------- currentdump
2130: sub currentdump {
1.328 matthew 2131: my ($courseid,$sdom,$sname)=@_;
1.326 matthew 2132: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2133: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2134: $sname = $ENV{'user.name'} if (! defined($sname));
2135: my $uhome = &homeserver($sname,$sdom);
2136: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
1.318 matthew 2137: return if ($rep =~ /^(error:|no_such_host)/);
1.319 matthew 2138: #
1.318 matthew 2139: my %returnhash=();
1.319 matthew 2140: #
2141: if ($rep eq "unknown_cmd") {
2142: # an old lond will not know currentdump
2143: # Do a dump and make it look like a currentdump
1.326 matthew 2144: my @tmp = &dump($courseid,$sdom,$sname,'.');
1.319 matthew 2145: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2146: my %hash = @tmp;
2147: @tmp=();
2148: # Code ripped from lond, essentially. The only difference
2149: # here is the unescaping done by lonnet::dump(). Conceivably
2150: # we might run in to problems with parameter names =~ /^v\./
2151: while (my ($key,$value) = each(%hash)) {
2152: my ($v,$symb,$param) = split(/:/,$key);
2153: next if ($v eq 'version' || $symb eq 'keys');
2154: next if (exists($returnhash{$symb}) &&
2155: exists($returnhash{$symb}->{$param}) &&
2156: $returnhash{$symb}->{'v.'.$param} > $v);
2157: $returnhash{$symb}->{$param}=$value;
2158: $returnhash{$symb}->{'v.'.$param}=$v;
2159: }
2160: #
2161: # Remove all of the keys in the hashes which keep track of
2162: # the version of the parameter.
2163: while (my ($symb,$param_hash) = each(%returnhash)) {
2164: # use a foreach because we are going to delete from the hash.
2165: foreach my $key (keys(%$param_hash)) {
2166: delete($param_hash->{$key}) if ($key =~ /^v\./);
2167: }
2168: }
2169: } else {
2170: my @pairs=split(/\&/,$rep);
2171: foreach (@pairs) {
2172: my ($key,$value)=split(/=/,$_);
2173: my ($symb,$param) = split(/:/,$key);
2174: $returnhash{&unescape($symb)}->{&unescape($param)} =
2175: &unescape($value);
2176: }
1.191 harris41 2177: }
1.12 www 2178: return %returnhash;
2179: }
2180:
2181: # --------------------------------------------------------------- put interface
2182:
2183: sub put {
1.134 albertel 2184: my ($namespace,$storehash,$udomain,$uname)=@_;
2185: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2186: if (!$uname) { $uname=$ENV{'user.name'}; }
2187: my $uhome=&homeserver($uname,$udomain);
1.12 www 2188: my $items='';
1.191 harris41 2189: foreach (keys %$storehash) {
1.134 albertel 2190: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1.191 harris41 2191: }
1.12 www 2192: $items=~s/\&$//;
1.134 albertel 2193: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1.47 www 2194: }
2195:
2196: # ------------------------------------------------------ critical put interface
2197:
2198: sub cput {
1.134 albertel 2199: my ($namespace,$storehash,$udomain,$uname)=@_;
2200: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2201: if (!$uname) { $uname=$ENV{'user.name'}; }
2202: my $uhome=&homeserver($uname,$udomain);
1.47 www 2203: my $items='';
1.191 harris41 2204: foreach (keys %$storehash) {
1.134 albertel 2205: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1.191 harris41 2206: }
1.47 www 2207: $items=~s/\&$//;
1.134 albertel 2208: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1.12 www 2209: }
2210:
2211: # -------------------------------------------------------------- eget interface
2212:
2213: sub eget {
1.133 albertel 2214: my ($namespace,$storearr,$udomain,$uname)=@_;
1.12 www 2215: my $items='';
1.191 harris41 2216: foreach (@$storearr) {
1.12 www 2217: $items.=escape($_).'&';
1.191 harris41 2218: }
1.12 www 2219: $items=~s/\&$//;
1.133 albertel 2220: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2221: if (!$uname) { $uname=$ENV{'user.name'}; }
2222: my $uhome=&homeserver($uname,$udomain);
2223: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1.12 www 2224: my @pairs=split(/\&/,$rep);
2225: my %returnhash=();
1.42 www 2226: my $i=0;
1.191 harris41 2227: foreach (@$storearr) {
1.42 www 2228: $returnhash{$_}=unescape($pairs[$i]);
2229: $i++;
1.191 harris41 2230: }
1.12 www 2231: return %returnhash;
2232: }
2233:
1.341 www 2234: # ---------------------------------------------- Custom access rule evaluation
2235:
2236: sub customaccess {
2237: my ($priv,$uri)=@_;
1.342 www 2238: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
1.343 www 2239: $urealm=~s/^\W//;
2240: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
1.341 www 2241: my $access=0;
2242: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
1.342 www 2243: my ($effect,$realm,$role)=split(/\:/,$_);
1.343 www 2244: if ($role) {
2245: if ($role ne $urole) { next; }
2246: }
2247: foreach (split(/\s*\,\s*/,$realm)) {
2248: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2249: if ($tdom) {
2250: if ($tdom ne $udom) { next; }
2251: }
2252: if ($tcrs) {
2253: if ($tcrs ne $ucrs) { next; }
2254: }
2255: if ($tsec) {
2256: if ($tsec ne $usec) { next; }
2257: }
2258: $access=($effect eq 'allow');
2259: last;
1.342 www 2260: }
1.402 bowersj2 2261: if ($realm eq '' && $role eq '') {
2262: $access=($effect eq 'allow');
2263: }
1.341 www 2264: }
2265: return $access;
2266: }
2267:
1.103 harris41 2268: # ------------------------------------------------- Check for a user privilege
1.12 www 2269:
2270: sub allowed {
2271: my ($priv,$uri)=@_;
1.152 www 2272:
2273: my $orguri=$uri;
1.52 www 2274: $uri=&declutter($uri);
1.29 www 2275:
1.398 albertel 2276: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
1.54 www 2277: # Free bre access to adm and meta resources
1.29 www 2278:
1.54 www 2279: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1.14 www 2280: return 'F';
1.159 www 2281: }
2282:
2283: # Free bre to public access
2284:
2285: if ($priv eq 'bre') {
1.238 www 2286: my $copyright=&metadata($uri,'copyright');
1.301 www 2287: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2288: return 'F';
2289: }
1.238 www 2290: if ($copyright eq 'priv') {
2291: $uri=~/([^\/]+)\/([^\/]+)\//;
2292: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2293: return '';
2294: }
2295: }
2296: if ($copyright eq 'domain') {
2297: $uri=~/([^\/]+)\/([^\/]+)\//;
2298: unless (($ENV{'user.domain'} eq $1) ||
2299: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2300: return '';
2301: }
1.262 matthew 2302: }
2303: if ($ENV{'request.role'}=~ /li\.\//) {
2304: # Library role, so allow browsing of resources in this domain.
2305: return 'F';
1.238 www 2306: }
1.341 www 2307: if ($copyright eq 'custom') {
2308: unless (&customaccess($priv,$uri)) { return ''; }
2309: }
1.14 www 2310: }
1.264 matthew 2311: # Domain coordinator is trying to create a course
2312: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2313: # uri is the requested domain in this case.
2314: # comparison to 'request.role.domain' shows if the user has selected
2315: # a role of dc for the domain in question.
2316: return 'F' if ($uri eq $ENV{'request.role.domain'});
2317: }
1.29 www 2318:
1.52 www 2319: my $thisallowed='';
2320: my $statecond=0;
2321: my $courseprivid='';
2322:
2323: # Course
2324:
2325: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
2326: $thisallowed.=$1;
2327: }
1.29 www 2328:
1.52 www 2329: # Domain
2330:
2331: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2332: =~/$priv\&([^\:]*)/) {
1.12 www 2333: $thisallowed.=$1;
2334: }
1.52 www 2335:
2336: # Course: uri itself is a course
1.66 www 2337: my $courseuri=$uri;
2338: $courseuri=~s/\_(\d)/\/$1/;
1.83 www 2339: $courseuri=~s/^([^\/])/\/$1/;
1.81 www 2340:
1.83 www 2341: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1.52 www 2342: =~/$priv\&([^\:]*)/) {
1.12 www 2343: $thisallowed.=$1;
2344: }
1.29 www 2345:
1.314 www 2346: # URI is an uploaded document for this course
2347:
2348: if (($priv eq 'bre') &&
2349: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2350: return 'F';
2351: }
1.52 www 2352: # Full access at system, domain or course-wide level? Exit.
1.29 www 2353:
2354: if ($thisallowed=~/F/) {
2355: return 'F';
2356: }
2357:
1.52 www 2358: # If this is generating or modifying users, exit with special codes
1.29 www 2359:
1.166 www 2360: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1.52 www 2361: return $thisallowed;
2362: }
2363: #
1.103 harris41 2364: # Gathered so far: system, domain and course wide privileges
1.52 www 2365: #
2366: # Course: See if uri or referer is an individual resource that is part of
2367: # the course
2368:
2369: if ($ENV{'request.course.id'}) {
1.232 www 2370:
1.52 www 2371: $courseprivid=$ENV{'request.course.id'};
2372: if ($ENV{'request.course.sec'}) {
2373: $courseprivid.='/'.$ENV{'request.course.sec'};
2374: }
2375: $courseprivid=~s/\_/\//;
2376: my $checkreferer=1;
1.232 www 2377: my ($match,$cond)=&is_on_map($uri);
2378: if ($match) {
2379: $statecond=$cond;
1.52 www 2380: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2381: =~/$priv\&([^\:]*)/) {
2382: $thisallowed.=$1;
2383: $checkreferer=0;
2384: }
1.29 www 2385: }
1.83 www 2386:
1.148 www 2387: if ($checkreferer) {
1.152 www 2388: my $refuri=$ENV{'httpref.'.$orguri};
1.148 www 2389: unless ($refuri) {
1.191 harris41 2390: foreach (keys %ENV) {
1.148 www 2391: if ($_=~/^httpref\..*\*/) {
2392: my $pattern=$_;
1.156 www 2393: $pattern=~s/^httpref\.\/res\///;
1.148 www 2394: $pattern=~s/\*/\[\^\/\]\+/g;
2395: $pattern=~s/\//\\\//g;
1.152 www 2396: if ($orguri=~/$pattern/) {
1.148 www 2397: $refuri=$ENV{$_};
2398: }
2399: }
1.191 harris41 2400: }
1.148 www 2401: }
1.232 www 2402:
1.148 www 2403: if ($refuri) {
1.152 www 2404: $refuri=&declutter($refuri);
1.232 www 2405: my ($match,$cond)=&is_on_map($refuri);
2406: if ($match) {
2407: my $refstatecond=$cond;
1.52 www 2408: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2409: =~/$priv\&([^\:]*)/) {
2410: $thisallowed.=$1;
1.53 www 2411: $uri=$refuri;
2412: $statecond=$refstatecond;
1.52 www 2413: }
2414: }
1.148 www 2415: }
1.29 www 2416: }
1.52 www 2417: }
1.29 www 2418:
1.52 www 2419: #
1.103 harris41 2420: # Gathered now: all privileges that could apply, and condition number
1.52 www 2421: #
2422: #
2423: # Full or no access?
2424: #
1.29 www 2425:
1.52 www 2426: if ($thisallowed=~/F/) {
2427: return 'F';
2428: }
1.29 www 2429:
1.52 www 2430: unless ($thisallowed) {
2431: return '';
2432: }
1.29 www 2433:
1.52 www 2434: # Restrictions exist, deal with them
2435: #
2436: # C:according to course preferences
2437: # R:according to resource settings
2438: # L:unless locked
2439: # X:according to user session state
2440: #
2441:
2442: # Possibly locked functionality, check all courses
1.54 www 2443: # Locks might take effect only after 10 minutes cache expiration for other
2444: # courses, and 2 minutes for current course
1.52 www 2445:
2446: my $envkey;
2447: if ($thisallowed=~/L/) {
2448: foreach $envkey (keys %ENV) {
1.54 www 2449: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2450: my $courseid=$2;
2451: my $roleid=$1.'.'.$2;
1.92 www 2452: $courseid=~s/^\///;
1.54 www 2453: my $expiretime=600;
2454: if ($ENV{'request.role'} eq $roleid) {
2455: $expiretime=120;
2456: }
2457: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2458: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2459: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2460: &coursedescription($courseid);
2461: }
2462: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2463: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2464: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1.57 www 2465: &log($ENV{'user.domain'},$ENV{'user.name'},
1.239 www 2466: $ENV{'user.home'},
1.57 www 2467: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1.52 www 2468: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1.54 www 2469: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1.52 www 2470: return '';
2471: }
2472: }
1.54 www 2473: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2474: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2475: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1.57 www 2476: &log($ENV{'user.domain'},$ENV{'user.name'},
1.239 www 2477: $ENV{'user.home'},
1.57 www 2478: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1.52 www 2479: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1.54 www 2480: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1.52 www 2481: return '';
2482: }
2483: }
2484: }
1.29 www 2485: }
1.52 www 2486: }
2487:
2488: #
2489: # Rest of the restrictions depend on selected course
2490: #
2491:
2492: unless ($ENV{'request.course.id'}) {
2493: return '1';
2494: }
1.29 www 2495:
1.52 www 2496: #
2497: # Now user is definitely in a course
2498: #
1.53 www 2499:
2500:
2501: # Course preferences
2502:
2503: if ($thisallowed=~/C/) {
1.54 www 2504: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1.237 www 2505: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
1.54 www 2506: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1.194 www 2507: =~/$rolecode/) {
1.57 www 2508: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2509: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1.237 www 2510: $ENV{'request.course.id'});
2511: return '';
2512: }
2513:
2514: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2515: =~/$unamedom/) {
2516: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2517: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
1.54 www 2518: $ENV{'request.course.id'});
2519: return '';
2520: }
1.53 www 2521: }
2522:
2523: # Resource preferences
2524:
2525: if ($thisallowed=~/R/) {
1.54 www 2526: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1.341 www 2527: if (&metadata($uri,'roledeny')=~/$rolecode/) {
2528: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1.57 www 2529: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1.341 www 2530: return '';
1.54 www 2531: }
1.53 www 2532: }
1.30 www 2533:
1.246 www 2534: # Restricted by state or randomout?
1.30 www 2535:
1.52 www 2536: if ($thisallowed=~/X/) {
1.247 www 2537: if ($ENV{'acc.randomout'}) {
1.249 www 2538: my $symb=&symbread($uri,1);
1.248 www 2539: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2540: return '';
2541: }
1.247 www 2542: }
2543: if (&condval($statecond)) {
1.52 www 2544: return '2';
2545: } else {
2546: return '';
2547: }
2548: }
1.30 www 2549:
1.52 www 2550: return 'F';
1.232 www 2551: }
2552:
2553: # --------------------------------------------------- Is a resource on the map?
2554:
2555: sub is_on_map {
2556: my $uri=&declutter(shift);
2557: my @uriparts=split(/\//,$uri);
2558: my $filename=$uriparts[$#uriparts];
2559: my $pathname=$uri;
1.289 bowersj2 2560: $pathname=~s|/\Q$filename\E$||;
1.332 www 2561: $pathname=~s/^adm\/wrapper\///;
1.289 bowersj2 2562: #Trying to find the conditional for the file
1.232 www 2563: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1.289 bowersj2 2564: /\&\Q$filename\E\:([\d\|]+)\&/);
1.232 www 2565: if ($match) {
1.289 bowersj2 2566: return (1,$1);
2567: } else {
2568: return (0,0);
2569: }
1.12 www 2570: }
2571:
2572: # ----------------------------------------------------------------- Define Role
2573:
2574: sub definerole {
2575: if (allowed('mcr','/')) {
2576: my ($rolename,$sysrole,$domrole,$courole)=@_;
1.392 www 2577: foreach (split(':',$sysrole)) {
1.21 www 2578: my ($crole,$cqual)=split(/\&/,$_);
2579: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2580: if ($pr{'cr:s'}=~/$crole\&/) {
2581: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2582: return "refused:s:$crole&$cqual";
2583: }
2584: }
1.191 harris41 2585: }
1.392 www 2586: foreach (split(':',$domrole)) {
1.21 www 2587: my ($crole,$cqual)=split(/\&/,$_);
2588: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2589: if ($pr{'cr:d'}=~/$crole\&/) {
2590: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2591: return "refused:d:$crole&$cqual";
2592: }
2593: }
1.191 harris41 2594: }
1.392 www 2595: foreach (split(':',$courole)) {
1.21 www 2596: my ($crole,$cqual)=split(/\&/,$_);
2597: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2598: if ($pr{'cr:c'}=~/$crole\&/) {
2599: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2600: return "refused:c:$crole&$cqual";
2601: }
2602: }
1.191 harris41 2603: }
1.12 www 2604: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2605: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1.21 www 2606: "rolesdef_$rolename=".
2607: escape($sysrole.'_'.$domrole.'_'.$courole);
1.12 www 2608: return reply($command,$ENV{'user.home'});
2609: } else {
2610: return 'refused';
2611: }
1.105 harris41 2612: }
2613:
2614: # ---------------- Make a metadata query against the network of library servers
2615:
2616: sub metadata_query {
1.244 matthew 2617: my ($query,$custom,$customshow,$server_array)=@_;
1.120 harris41 2618: my %rhash;
1.244 matthew 2619: my @server_list = (defined($server_array) ? @$server_array
2620: : keys(%libserv) );
2621: for my $server (@server_list) {
1.118 harris41 2622: unless ($custom or $customshow) {
2623: my $reply=&reply("querysend:".&escape($query),$server);
2624: $rhash{$server}=$reply;
2625: }
2626: else {
2627: my $reply=&reply("querysend:".&escape($query).':'.
2628: &escape($custom).':'.&escape($customshow),
2629: $server);
2630: $rhash{$server}=$reply;
2631: }
1.112 harris41 2632: }
1.118 harris41 2633: return \%rhash;
1.240 www 2634: }
2635:
2636: # ----------------------------------------- Send log queries and wait for reply
2637:
2638: sub log_query {
2639: my ($uname,$udom,$query,%filters)=@_;
2640: my $uhome=&homeserver($uname,$udom);
2641: if ($uhome eq 'no_host') { return 'error: no_host'; }
2642: my $uhost=$hostname{$uhome};
1.241 www 2643: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
1.240 www 2644: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2645: $uhome);
2646: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
1.242 www 2647: return get_query_reply($queryid);
2648: }
2649:
2650: sub get_query_reply {
2651: my $queryid=shift;
1.240 www 2652: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2653: my $reply='';
2654: for (1..100) {
2655: sleep 2;
2656: if (-e $replyfile.'.end') {
2657: if (my $fh=Apache::File->new($replyfile)) {
2658: $reply.=<$fh>;
2659: $fh->close;
2660: } else { return 'error: reply_file_error'; }
1.242 www 2661: return &unescape($reply);
2662: }
1.240 www 2663: }
1.242 www 2664: return 'timeout:'.$queryid;
1.240 www 2665: }
2666:
2667: sub courselog_query {
1.241 www 2668: #
2669: # possible filters:
2670: # url: url or symb
2671: # username
2672: # domain
2673: # action: view, submit, grade
2674: # start: timestamp
2675: # end: timestamp
2676: #
1.240 www 2677: my (%filters)=@_;
2678: unless ($ENV{'request.course.id'}) { return 'no_course'; }
1.241 www 2679: if ($filters{'url'}) {
2680: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2681: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2682: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2683: }
1.240 www 2684: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2685: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2686: return &log_query($cname,$cdom,'courselog',%filters);
2687: }
2688:
2689: sub userlog_query {
2690: my ($uname,$udom,%filters)=@_;
2691: return &log_query($uname,$udom,'userlog',%filters);
1.12 www 2692: }
2693:
2694: # ------------------------------------------------------------------ Plain Text
2695:
2696: sub plaintext {
1.22 www 2697: my $short=shift;
2698: return $prp{$short};
1.12 www 2699: }
2700:
2701: # ----------------------------------------------------------------- Assign Role
2702:
2703: sub assignrole {
1.357 www 2704: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
1.21 www 2705: my $mrole;
2706: if ($role =~ /^cr\//) {
1.393 www 2707: my $cwosec=$url;
2708: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2709: unless (&allowed('ccr',$cwosec)) {
1.104 www 2710: &logthis('Refused custom assignrole: '.
2711: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2712: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2713: return 'refused';
2714: }
1.21 www 2715: $mrole='cr';
2716: } else {
1.82 www 2717: my $cwosec=$url;
1.83 www 2718: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1.373 www 2719: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
1.104 www 2720: &logthis('Refused assignrole: '.
2721: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2722: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2723: return 'refused';
2724: }
1.21 www 2725: $mrole=$role;
2726: }
2727: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2728: "$udom:$uname:$url".'_'."$mrole=$role";
1.81 www 2729: if ($end) { $command.='_'.$end; }
1.21 www 2730: if ($start) {
2731: if ($end) {
1.81 www 2732: $command.='_'.$start;
1.21 www 2733: } else {
1.81 www 2734: $command.='_0_'.$start;
1.21 www 2735: }
2736: }
1.357 www 2737: # actually delete
2738: if ($deleteflag) {
1.373 www 2739: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
1.357 www 2740: # modify command to delete the role
2741: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
2742: "$udom:$uname:$url".'_'."$mrole";
1.373 www 2743: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
1.357 www 2744: # set start and finish to negative values for userrolelog
2745: $start=-1;
2746: $end=-1;
2747: }
2748: }
2749: # send command
1.349 www 2750: my $answer=&reply($command,&homeserver($uname,$udom));
1.357 www 2751: # log new user role if status is ok
1.349 www 2752: if ($answer eq 'ok') {
2753: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
2754: }
2755: return $answer;
1.169 harris41 2756: }
2757:
2758: # -------------------------------------------------- Modify user authentication
1.197 www 2759: # Overrides without validation
2760:
1.169 harris41 2761: sub modifyuserauth {
2762: my ($udom,$uname,$umode,$upass)=@_;
2763: my $uhome=&homeserver($uname,$udom);
1.197 www 2764: unless (&allowed('mau',$udom)) { return 'refused'; }
2765: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
1.272 matthew 2766: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2767: ' in domain '.$ENV{'request.role.domain'});
1.169 harris41 2768: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2769: &escape($upass),$uhome);
1.197 www 2770: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2771: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2772: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2773: &log($udom,,$uname,$uhome,
2774: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2775: $ENV{'user.name'}.', '.$umode.
2776: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
1.169 harris41 2777: unless ($reply eq 'ok') {
1.197 www 2778: &logthis('Authentication mode error: '.$reply);
1.169 harris41 2779: return 'error: '.$reply;
2780: }
1.170 harris41 2781: return 'ok';
1.80 www 2782: }
2783:
1.81 www 2784: # --------------------------------------------------------------- Modify a user
1.80 www 2785:
1.81 www 2786: sub modifyuser {
1.206 matthew 2787: my ($udom, $uname, $uid,
2788: $umode, $upass, $first,
2789: $middle, $last, $gene,
1.387 www 2790: $forceid, $desiredhome, $email)=@_;
1.198 www 2791: $udom=~s/\W//g;
2792: $uname=~s/\W//g;
1.81 www 2793: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1.80 www 2794: $umode.', '.$first.', '.$middle.', '.
1.206 matthew 2795: $last.', '.$gene.'(forceid: '.$forceid.')'.
2796: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2797: ' desiredhome not specified').
1.272 matthew 2798: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2799: ' in domain '.$ENV{'request.role.domain'});
1.230 stredwic 2800: my $uhome=&homeserver($uname,$udom,'true');
1.80 www 2801: # ----------------------------------------------------------------- Create User
1.81 www 2802: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1.80 www 2803: my $unhome='';
1.209 matthew 2804: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2805: $unhome = $desiredhome;
2806: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1.80 www 2807: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1.209 matthew 2808: } else { # load balancing routine for determining $unhome
1.80 www 2809: my $tryserver;
1.81 www 2810: my $loadm=10000000;
1.80 www 2811: foreach $tryserver (keys %libserv) {
2812: if ($hostdom{$tryserver} eq $udom) {
2813: my $answer=reply('load',$tryserver);
2814: if (($answer=~/\d+/) && ($answer<$loadm)) {
2815: $loadm=$answer;
2816: $unhome=$tryserver;
2817: }
2818: }
2819: }
2820: }
2821: if (($unhome eq '') || ($unhome eq 'no_host')) {
1.206 matthew 2822: return 'error: unable to find a home server for '.$uname.
2823: ' in domain '.$udom;
1.80 www 2824: }
2825: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2826: &escape($upass),$unhome);
2827: unless ($reply eq 'ok') {
2828: return 'error: '.$reply;
2829: }
1.230 stredwic 2830: $uhome=&homeserver($uname,$udom,'true');
1.80 www 2831: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1.386 matthew 2832: return 'error: unable verify users home machine.';
1.80 www 2833: }
1.209 matthew 2834: } # End of creation of new user
1.80 www 2835: # ---------------------------------------------------------------------- Add ID
2836: if ($uid) {
2837: $uid=~tr/A-Z/a-z/;
2838: my %uidhash=&idrget($udom,$uname);
1.196 www 2839: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2840: && (!$forceid)) {
1.80 www 2841: unless ($uid eq $uidhash{$uname}) {
1.386 matthew 2842: return 'error: user id "'.$uid.'" does not match '.
2843: 'current user id "'.$uidhash{$uname}.'".';
1.80 www 2844: }
2845: } else {
2846: &idput($udom,($uname => $uid));
2847: }
2848: }
2849: # -------------------------------------------------------------- Add names, etc
1.313 matthew 2850: my @tmp=&get('environment',
1.134 albertel 2851: ['firstname','middlename','lastname','generation'],
2852: $udom,$uname);
1.313 matthew 2853: my %names;
2854: if ($tmp[0] =~ m/^error:.*/) {
2855: %names=();
2856: } else {
2857: %names = @tmp;
2858: }
1.388 www 2859: #
2860: # Make sure to not trash student environment if instructor does not bother
2861: # to supply name and email information
2862: #
2863: if ($first) { $names{'firstname'} = $first; }
1.385 matthew 2864: if (defined($middle)) { $names{'middlename'} = $middle; }
1.388 www 2865: if ($last) { $names{'lastname'} = $last; }
1.385 matthew 2866: if (defined($gene)) { $names{'generation'} = $gene; }
1.388 www 2867: if ($email) { $names{'notification'} = $email;
2868: $names{'critnotification'} = $email; }
1.387 www 2869:
1.134 albertel 2870: my $reply = &put('environment', \%names, $udom,$uname);
2871: if ($reply ne 'ok') { return 'error: '.$reply; }
1.81 www 2872: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1.80 www 2873: $umode.', '.$first.', '.$middle.', '.
2874: $last.', '.$gene.' by '.
2875: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1.134 albertel 2876: return 'ok';
1.80 www 2877: }
2878:
1.81 www 2879: # -------------------------------------------------------------- Modify student
1.80 www 2880:
1.81 www 2881: sub modifystudent {
2882: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1.387 www 2883: $end,$start,$forceid,$desiredhome,$email)=@_;
1.81 www 2884: my $cid='';
2885: unless ($cid=$ENV{'request.course.id'}) {
1.80 www 2886: return 'not_in_class';
2887: }
2888: # --------------------------------------------------------------- Make the user
1.81 www 2889: my $reply=&modifyuser
1.209 matthew 2890: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
1.387 www 2891: $desiredhome,$email);
1.80 www 2892: unless ($reply eq 'ok') { return $reply; }
1.297 matthew 2893: # This will cause &modify_student_enrollment to get the uid from the
2894: # students environment
2895: $uid = undef if (!$forceid);
2896: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
2897: $last,$gene,$usec,$end,$start);
2898: return $reply;
2899: }
2900:
2901: sub modify_student_enrollment {
2902: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
2903: # Get the course id from the environment
2904: my $cid='';
2905: unless ($cid=$ENV{'request.course.id'}) {
2906: return 'not_in_class';
2907: }
2908: # Make sure the user exists
1.81 www 2909: my $uhome=&homeserver($uname,$udom);
2910: if (($uhome eq '') || ($uhome eq 'no_host')) {
2911: return 'error: no such user';
2912: }
1.297 matthew 2913: #
2914: # Get student data if we were not given enough information
2915: if (!defined($first) || $first eq '' ||
2916: !defined($last) || $last eq '' ||
2917: !defined($uid) || $uid eq '' ||
2918: !defined($middle) || $middle eq '' ||
2919: !defined($gene) || $gene eq '') {
1.294 matthew 2920: # They did not supply us with enough data to enroll the student, so
2921: # we need to pick up more information.
1.297 matthew 2922: my %tmp = &get('environment',
1.294 matthew 2923: ['firstname','middlename','lastname', 'generation','id']
1.297 matthew 2924: ,$udom,$uname);
2925:
2926: foreach (keys(%tmp)) {
2927: &logthis("key $_ = ".$tmp{$_});
2928: }
1.294 matthew 2929: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
2930: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
2931: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
1.297 matthew 2932: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
1.294 matthew 2933: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
2934: }
2935: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
2936: $first,$middle);
1.297 matthew 2937: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1.81 www 2938: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2939: &escape($uname.':'.$udom).'='.
1.294 matthew 2940: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
1.81 www 2941: $ENV{'course.'.$cid.'.home'});
2942: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2943: return 'error: '.$reply;
2944: }
1.297 matthew 2945: # Add student role to user
1.83 www 2946: my $uurl='/'.$cid;
1.81 www 2947: $uurl=~s/\_/\//g;
2948: if ($usec) {
2949: $uurl.='/'.$usec;
2950: }
2951: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1.21 www 2952: }
2953:
1.84 www 2954: # ------------------------------------------------- Write to course preferences
2955:
2956: sub writecoursepref {
2957: my ($courseid,%prefs)=@_;
2958: $courseid=~s/^\///;
2959: $courseid=~s/\_/\//g;
2960: my ($cdomain,$cnum)=split(/\//,$courseid);
2961: my $chome=homeserver($cnum,$cdomain);
2962: if (($chome eq '') || ($chome eq 'no_host')) {
2963: return 'error: no such course';
2964: }
2965: my $cstring='';
1.191 harris41 2966: foreach (keys %prefs) {
1.84 www 2967: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1.191 harris41 2968: }
1.84 www 2969: $cstring=~s/\&$//;
2970: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2971: }
2972:
2973: # ---------------------------------------------------------- Make/modify course
2974:
2975: sub createcourse {
1.271 www 2976: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
1.84 www 2977: $url=&declutter($url);
2978: my $cid='';
1.264 matthew 2979: unless (&allowed('ccc',$udom)) {
1.84 www 2980: return 'refused';
2981: }
2982: # ------------------------------------------------------------------- Create ID
2983: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2984: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2985: # ----------------------------------------------- Make sure that does not exist
1.230 stredwic 2986: my $uhome=&homeserver($uname,$udom,'true');
1.84 www 2987: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2988: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2989: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1.230 stredwic 2990: $uhome=&homeserver($uname,$udom,'true');
1.84 www 2991: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2992: return 'error: unable to generate unique course-ID';
2993: }
2994: }
1.264 matthew 2995: # ------------------------------------------------ Check supplied server name
2996: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
2997: if (! exists($libserv{$course_server})) {
2998: return 'error:bad server name '.$course_server;
2999: }
1.84 www 3000: # ------------------------------------------------------------- Make the course
3001: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1.264 matthew 3002: $course_server);
1.84 www 3003: unless ($reply eq 'ok') { return 'error: '.$reply; }
1.230 stredwic 3004: $uhome=&homeserver($uname,$udom,'true');
1.84 www 3005: if (($uhome eq '') || ($uhome eq 'no_host')) {
3006: return 'error: no such course';
3007: }
1.271 www 3008: # ----------------------------------------------------------------- Course made
1.358 www 3009: # log existance
3010: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description),
3011: $uhome);
3012: &flushcourselogs();
3013: # set toplevel url
1.271 www 3014: my $topurl=$url;
3015: unless ($nonstandard) {
3016: # ------------------------------------------ For standard courses, make top url
3017: my $mapurl=&clutter($url);
1.278 www 3018: if ($mapurl eq '/res/') { $mapurl=''; }
1.271 www 3019: $ENV{'form.initmap'}=(<<ENDINITMAP);
3020: <map>
3021: <resource id="1" type="start"></resource>
3022: <resource id="2" src="$mapurl"></resource>
3023: <resource id="3" type="finish"></resource>
3024: <link index="1" from="1" to="2"></link>
3025: <link index="2" from="2" to="3"></link>
3026: </map>
3027: ENDINITMAP
3028: $topurl=&declutter(
3029: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3030: );
3031: }
3032: # ----------------------------------------------------------- Write preferences
1.84 www 3033: &writecoursepref($udom.'_'.$uname,
3034: ('description' => $description,
1.271 www 3035: 'url' => $topurl));
1.84 www 3036: return '/'.$udom.'/'.$uname;
3037: }
3038:
1.21 www 3039: # ---------------------------------------------------------- Assign Custom Role
3040:
3041: sub assigncustomrole {
1.357 www 3042: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
1.21 www 3043: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1.357 www 3044: $end,$start,$deleteflag);
1.21 www 3045: }
3046:
3047: # ----------------------------------------------------------------- Revoke Role
3048:
3049: sub revokerole {
1.357 www 3050: my ($udom,$uname,$url,$role,$deleteflag)=@_;
1.21 www 3051: my $now=time;
1.357 www 3052: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
1.21 www 3053: }
3054:
3055: # ---------------------------------------------------------- Revoke Custom Role
3056:
3057: sub revokecustomrole {
1.357 www 3058: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
1.21 www 3059: my $now=time;
1.357 www 3060: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3061: $deleteflag);
1.17 www 3062: }
3063:
3064: # ------------------------------------------------------------ Directory lister
3065:
3066: sub dirlist {
1.253 stredwic 3067: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3068:
1.18 www 3069: $uri=~s/^\///;
3070: $uri=~s/\/$//;
1.253 stredwic 3071: my ($udom, $uname);
3072: (undef,$udom,$uname)=split(/\//,$uri);
3073: if(defined($userdomain)) {
3074: $udom = $userdomain;
3075: }
3076: if(defined($username)) {
3077: $uname = $username;
3078: }
3079:
3080: my $dirRoot = $perlvar{'lonDocRoot'};
3081: if(defined($alternateDirectoryRoot)) {
3082: $dirRoot = $alternateDirectoryRoot;
3083: $dirRoot =~ s/\/$//;
3084: }
3085:
3086: if($udom) {
3087: if($uname) {
3088: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
3089: homeserver($uname,$udom));
3090: return split(/:/,$listing);
3091: } elsif(!defined($alternateDirectoryRoot)) {
3092: my $tryserver;
3093: my %allusers=();
3094: foreach $tryserver (keys %libserv) {
3095: if($hostdom{$tryserver} eq $udom) {
3096: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3097: $udom, $tryserver);
3098: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
3099: && ($listing ne 'con_lost')) {
3100: foreach (split(/:/,$listing)) {
3101: my ($entry,@stat)=split(/&/,$_);
3102: $allusers{$entry}=1;
3103: }
3104: }
1.191 harris41 3105: }
1.253 stredwic 3106: }
3107: my $alluserstr='';
3108: foreach (sort keys %allusers) {
3109: $alluserstr.=$_.'&user:';
3110: }
3111: $alluserstr=~s/:$//;
3112: return split(/:/,$alluserstr);
3113: } else {
3114: my @emptyResults = ();
3115: push(@emptyResults, 'missing user name');
3116: return split(':',@emptyResults);
3117: }
3118: } elsif(!defined($alternateDirectoryRoot)) {
3119: my $tryserver;
3120: my %alldom=();
3121: foreach $tryserver (keys %libserv) {
3122: $alldom{$hostdom{$tryserver}}=1;
3123: }
3124: my $alldomstr='';
3125: foreach (sort keys %alldom) {
1.397 albertel 3126: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
1.253 stredwic 3127: }
3128: $alldomstr=~s/:$//;
3129: return split(/:/,$alldomstr);
3130: } else {
3131: my @emptyResults = ();
3132: push(@emptyResults, 'missing domain');
3133: return split(':',@emptyResults);
1.275 stredwic 3134: }
3135: }
3136:
3137: # --------------------------------------------- GetFileTimestamp
3138: # This function utilizes dirlist and returns the date stamp for
3139: # when it was last modified. It will also return an error of -1
3140: # if an error occurs
3141:
3142: sub GetFileTimestamp {
3143: my ($studentDomain,$studentName,$filename,$root)=@_;
3144: $studentDomain=~s/\W//g;
3145: $studentName=~s/\W//g;
3146: my $subdir=$studentName.'__';
3147: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3148: my $proname="$studentDomain/$subdir/$studentName";
3149: $proname .= '/'.$filename;
1.375 matthew 3150: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
3151: $studentName, $root);
1.275 stredwic 3152: my @stats = split('&', $fileStat);
3153: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
1.375 matthew 3154: # @stats contains first the filename, then the stat output
3155: return $stats[10]; # so this is 10 instead of 9.
1.275 stredwic 3156: } else {
3157: return -1;
1.253 stredwic 3158: }
1.26 www 3159: }
3160:
3161: # -------------------------------------------------------- Value of a Condition
3162:
1.40 www 3163: sub directcondval {
3164: my $number=shift;
3165: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
3166: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
3167: } else {
3168: return 2;
3169: }
3170: }
3171:
1.26 www 3172: sub condval {
3173: my $condidx=shift;
3174: my $result=0;
1.54 www 3175: my $allpathcond='';
1.191 harris41 3176: foreach (split(/\|/,$condidx)) {
1.54 www 3177: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
3178: $allpathcond.=
3179: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
3180: }
1.191 harris41 3181: }
1.54 www 3182: $allpathcond=~s/\|$//;
1.33 www 3183: if ($ENV{'request.course.id'}) {
1.54 www 3184: if ($allpathcond) {
1.26 www 3185: my $operand='|';
3186: my @stack;
1.191 harris41 3187: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
1.26 www 3188: if ($_ eq '(') {
3189: push @stack,($operand,$result)
3190: } elsif ($_ eq ')') {
3191: my $before=pop @stack;
3192: if (pop @stack eq '&') {
3193: $result=$result>$before?$before:$result;
3194: } else {
3195: $result=$result>$before?$result:$before;
3196: }
3197: } elsif (($_ eq '&') || ($_ eq '|')) {
3198: $operand=$_;
3199: } else {
1.40 www 3200: my $new=directcondval($_);
1.26 www 3201: if ($operand eq '&') {
3202: $result=$result>$new?$new:$result;
3203: } else {
3204: $result=$result>$new?$result:$new;
1.191 harris41 3205: }
1.26 www 3206: }
1.191 harris41 3207: }
1.26 www 3208: }
3209: }
3210: return $result;
1.279 www 3211: }
3212:
3213: # ---------------------------------------------------- Devalidate courseresdata
3214:
3215: sub devalidatecourseresdata {
3216: my ($coursenum,$coursedomain)=@_;
3217: my $hashid=$coursenum.':'.$coursedomain;
3218: delete $courseresdatacache{$hashid.'.time'};
1.28 www 3219: }
3220:
1.200 www 3221: # --------------------------------------------------- Course Resourcedata Query
3222:
3223: sub courseresdata {
3224: my ($coursenum,$coursedomain,@which)=@_;
3225: my $coursehom=&homeserver($coursenum,$coursedomain);
3226: my $hashid=$coursenum.':'.$coursedomain;
1.250 albertel 3227: my $dodump=0;
3228: if (!defined($courseresdatacache{$hashid.'.time'})) {
3229: $dodump=1;
3230: } else {
3231: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
3232: }
3233: if ($dodump) {
1.251 albertel 3234: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
3235: my ($tmp) = keys(%dumpreply);
3236: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
3237: $courseresdatacache{$hashid.'.time'}=time;
3238: $courseresdatacache{$hashid}=\%dumpreply;
1.306 albertel 3239: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3240: return $tmp;
1.250 albertel 3241: }
3242: }
1.251 albertel 3243: foreach my $item (@which) {
1.287 albertel 3244: if (defined($courseresdatacache{$hashid}->{$item})) {
1.251 albertel 3245: return $courseresdatacache{$hashid}->{$item};
3246: }
1.250 albertel 3247: }
1.291 albertel 3248: return undef;
1.200 www 3249: }
3250:
1.379 matthew 3251: #
3252: # EXT resource caching routines
3253: #
3254:
3255: sub clear_EXT_cache_status {
1.383 albertel 3256: &delenv('cache.EXT.');
1.379 matthew 3257: }
3258:
3259: sub EXT_cache_status {
3260: my ($target_domain,$target_user) = @_;
1.383 albertel 3261: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
1.389 www 3262: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
1.379 matthew 3263: # We know already the user has no data
3264: return 1;
3265: } else {
3266: return 0;
3267: }
3268: }
3269:
3270: sub EXT_cache_set {
3271: my ($target_domain,$target_user) = @_;
1.383 albertel 3272: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
1.379 matthew 3273: &appenv($cachename => time);
3274: }
3275:
1.28 www 3276: # --------------------------------------------------------- Value of a Variable
1.58 www 3277: sub EXT {
1.395 albertel 3278: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
1.218 albertel 3279:
1.68 www 3280: unless ($varname) { return ''; }
1.218 albertel 3281: #get real user name/domain, courseid and symb
3282: my $courseid;
1.359 albertel 3283: my $publicuser;
1.218 albertel 3284: if (!($uname && $udom)) {
1.360 albertel 3285: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
1.378 matthew 3286: &Apache::lonxml::whichuser($symbparm);
1.218 albertel 3287: if (!$symbparm) { $symbparm=$cursymb; }
3288: } else {
3289: $courseid=$ENV{'request.course.id'};
3290: }
1.48 www 3291: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
3292: my $rest;
1.320 albertel 3293: if (defined($therest[0])) {
1.48 www 3294: $rest=join('.',@therest);
3295: } else {
3296: $rest='';
3297: }
1.320 albertel 3298:
1.57 www 3299: my $qualifierrest=$qualifier;
3300: if ($rest) { $qualifierrest.='.'.$rest; }
3301: my $spacequalifierrest=$space;
3302: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1.28 www 3303: if ($realm eq 'user') {
1.48 www 3304: # --------------------------------------------------------------- user.resource
3305: if ($space eq 'resource') {
1.335 albertel 3306: if (defined($Apache::lonhomework::parsing_a_problem)) {
3307: return $Apache::lonhomework::history{$qualifierrest};
3308: } else {
1.359 albertel 3309: my %restored;
3310: if ($publicuser || $ENV{'request.state'} eq 'construct') {
3311: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
3312: } else {
3313: %restored=&restore($symbparm,$courseid,$udom,$uname);
3314: }
1.335 albertel 3315: return $restored{$qualifierrest};
3316: }
1.48 www 3317: # ----------------------------------------------------------------- user.access
3318: } elsif ($space eq 'access') {
1.218 albertel 3319: # FIXME - not supporting calls for a specific user
1.48 www 3320: return &allowed($qualifier,$rest);
3321: # ------------------------------------------ user.preferences, user.environment
3322: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1.218 albertel 3323: if (($uname eq $ENV{'user.name'}) &&
3324: ($udom eq $ENV{'user.domain'})) {
3325: return $ENV{join('.',('environment',$qualifierrest))};
3326: } else {
1.359 albertel 3327: my %returnhash;
3328: if (!$publicuser) {
3329: %returnhash=&userenvironment($udom,$uname,
3330: $qualifierrest);
3331: }
1.218 albertel 3332: return $returnhash{$qualifierrest};
3333: }
1.48 www 3334: # ----------------------------------------------------------------- user.course
3335: } elsif ($space eq 'course') {
1.218 albertel 3336: # FIXME - not supporting calls for a specific user
1.48 www 3337: return $ENV{join('.',('request.course',$qualifier))};
3338: # ------------------------------------------------------------------- user.role
3339: } elsif ($space eq 'role') {
1.218 albertel 3340: # FIXME - not supporting calls for a specific user
1.48 www 3341: my ($role,$where)=split(/\./,$ENV{'request.role'});
3342: if ($qualifier eq 'value') {
3343: return $role;
3344: } elsif ($qualifier eq 'extent') {
3345: return $where;
3346: }
3347: # ----------------------------------------------------------------- user.domain
3348: } elsif ($space eq 'domain') {
1.218 albertel 3349: return $udom;
1.48 www 3350: # ------------------------------------------------------------------- user.name
3351: } elsif ($space eq 'name') {
1.218 albertel 3352: return $uname;
1.48 www 3353: # ---------------------------------------------------- Any other user namespace
1.29 www 3354: } else {
1.359 albertel 3355: my %reply;
3356: if (!$publicuser) {
3357: %reply=&get($space,[$qualifierrest],$udom,$uname);
3358: }
3359: return $reply{$qualifierrest};
1.48 www 3360: }
1.236 www 3361: } elsif ($realm eq 'query') {
3362: # ---------------------------------------------- pull stuff out of query string
1.384 albertel 3363: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
3364: [$spacequalifierrest]);
1.376 albertel 3365: return $ENV{'form.'.$spacequalifierrest};
1.236 www 3366: } elsif ($realm eq 'request') {
1.48 www 3367: # ------------------------------------------------------------- request.browser
3368: if ($space eq 'browser') {
3369: return $ENV{'browser.'.$qualifier};
1.57 www 3370: # ------------------------------------------------------------ request.filename
3371: } else {
3372: return $ENV{'request.'.$spacequalifierrest};
1.29 www 3373: }
1.28 www 3374: } elsif ($realm eq 'course') {
1.48 www 3375: # ---------------------------------------------------------- course.description
1.218 albertel 3376: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
1.57 www 3377: } elsif ($realm eq 'resource') {
1.165 www 3378:
1.395 albertel 3379: my $section;
1.359 albertel 3380: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
1.165 www 3381:
1.218 albertel 3382: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
1.165 www 3383:
1.60 www 3384: # ----------------------------------------------------- Cascading lookup scheme
1.218 albertel 3385: if (!$symbparm) { $symbparm=&symbread(); }
3386: my $symbp=$symbparm;
3387: my $mapp=(split(/\_\_\_/,$symbp))[0];
3388:
3389: my $symbparm=$symbp.'.'.$spacequalifierrest;
3390: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3391:
3392: if (($ENV{'user.name'} eq $uname) &&
3393: ($ENV{'user.domain'} eq $udom)) {
1.255 albertel 3394: $section=$ENV{'request.course.sec'};
1.218 albertel 3395: } else {
1.377 matthew 3396: if (! defined($usection)) {
3397: $section=&usection($udom,$uname,$courseid);
3398: } else {
3399: $section = $usection;
3400: }
1.218 albertel 3401: }
3402:
3403: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3404: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3405: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3406:
3407: my $courselevel=$courseid.'.'.$spacequalifierrest;
3408: my $courselevelr=$courseid.'.'.$symbparm;
3409: my $courselevelm=$courseid.'.'.$mapparm;
1.69 www 3410:
1.60 www 3411: # ----------------------------------------------------------- first, check user
1.379 matthew 3412: #most student don\'t have any data set, check if there is some data
1.308 albertel 3413: #every thirty minutes
1.379 matthew 3414: if (! &EXT_cache_status($udom,$uname)) {
1.308 albertel 3415: my %resourcedata=&get('resourcedata',
3416: [$courselevelr,$courselevelm,$courselevel],
3417: $udom,$uname);
3418: my ($tmp)=keys(%resourcedata);
3419: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
3420: if ($resourcedata{$courselevelr}) {
3421: return $resourcedata{$courselevelr}; }
3422: if ($resourcedata{$courselevelm}) {
3423: return $resourcedata{$courselevelm}; }
3424: if ($resourcedata{$courselevel}) {
3425: return $resourcedata{$courselevel}; }
3426: } else {
3427: if ($tmp!~/No such file/) {
3428: &logthis("<font color=blue>WARNING:".
3429: " Trying to get resource data for ".
3430: $uname." at ".$udom.": ".
3431: $tmp."</font>");
3432: } elsif ($tmp=~/error:No such file/) {
1.379 matthew 3433: &EXT_cache_set($udom,$uname);
1.308 albertel 3434: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3435: return $tmp;
3436: }
1.218 albertel 3437: }
3438: }
1.95 www 3439:
1.60 www 3440: # -------------------------------------------------------- second, check course
1.96 www 3441:
1.218 albertel 3442: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3443: $ENV{'course.'.$courseid.'.domain'},
3444: ($seclevelr,$seclevelm,$seclevel,
3445: $courselevelr,$courselevelm,
3446: $courselevel));
1.287 albertel 3447: if (defined($coursereply)) { return $coursereply; }
1.200 www 3448:
1.60 www 3449: # ------------------------------------------------------ third, check map parms
1.218 albertel 3450: my %parmhash=();
3451: my $thisparm='';
3452: if (tie(%parmhash,'GDBM_File',
3453: $ENV{'request.course.fn'}.'_parms.db',
1.256 albertel 3454: &GDBM_READER(),0640)) {
1.218 albertel 3455: $thisparm=$parmhash{$symbparm};
3456: untie(%parmhash);
3457: }
3458: if ($thisparm) { return $thisparm; }
3459: }
1.60 www 3460: # --------------------------------------------- last, look in resource metadata
1.71 www 3461:
1.218 albertel 3462: $spacequalifierrest=~s/\./\_/;
1.282 albertel 3463: my $filename;
3464: if (!$symbparm) { $symbparm=&symbread(); }
3465: if ($symbparm) {
3466: $filename=(split(/\_\_\_/,$symbparm))[2];
3467: } else {
3468: $filename=$ENV{'request.filename'};
3469: }
3470: my $metadata=&metadata($filename,$spacequalifierrest);
1.288 albertel 3471: if (defined($metadata)) { return $metadata; }
1.282 albertel 3472: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
1.288 albertel 3473: if (defined($metadata)) { return $metadata; }
1.142 www 3474:
1.145 www 3475: # ------------------------------------------------------------------ Cascade up
1.218 albertel 3476: unless ($space eq '0') {
1.336 albertel 3477: my @parts=split(/_/,$space);
3478: my $id=pop(@parts);
3479: my $part=join('_',@parts);
3480: if ($part eq '') { $part='0'; }
3481: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
1.395 albertel 3482: $symbparm,$udom,$uname,$section,1);
1.337 albertel 3483: if (defined($partgeneral)) { return $partgeneral; }
1.218 albertel 3484: }
1.395 albertel 3485: if ($recurse) { return undef; }
3486: my $pack_def=&packages_tab_default($filename,$varname);
3487: if (defined($pack_def)) { return $pack_def; }
1.71 www 3488:
1.48 www 3489: # ---------------------------------------------------- Any other user namespace
3490: } elsif ($realm eq 'environment') {
3491: # ----------------------------------------------------------------- environment
1.219 albertel 3492: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3493: return $ENV{'environment.'.$spacequalifierrest};
3494: } else {
3495: my %returnhash=&userenvironment($udom,$uname,
3496: $spacequalifierrest);
3497: return $returnhash{$spacequalifierrest};
3498: }
1.28 www 3499: } elsif ($realm eq 'system') {
1.48 www 3500: # ----------------------------------------------------------------- system.time
3501: if ($space eq 'time') {
3502: return time;
3503: }
1.28 www 3504: }
1.48 www 3505: return '';
1.61 www 3506: }
3507:
1.395 albertel 3508: sub packages_tab_default {
3509: my ($uri,$varname)=@_;
3510: my (undef,$part,$name)=split(/\./,$varname);
3511: my $packages=&metadata($uri,'packages');
3512: foreach my $package (split(/,/,$packages)) {
3513: my ($pack_type,$pack_part)=split(/_/,$package,2);
3514: if ($pack_part eq $part) {
3515: return $packagetab{"$pack_type&$name&default"};
3516: }
3517: }
3518: return undef;
3519: }
3520:
1.334 albertel 3521: sub add_prefix_and_part {
3522: my ($prefix,$part)=@_;
3523: my $keyroot;
3524: if (defined($prefix) && $prefix !~ /^__/) {
3525: # prefix that has a part already
3526: $keyroot=$prefix;
3527: } elsif (defined($prefix)) {
3528: # prefix that is missing a part
3529: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3530: } else {
3531: # no prefix at all
3532: if (defined($part)) { $keyroot='_'.$part; }
3533: }
3534: return $keyroot;
3535: }
3536:
1.71 www 3537: # ---------------------------------------------------------------- Get metadata
3538:
3539: sub metadata {
1.176 www 3540: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
1.78 www 3541:
1.71 www 3542: $uri=&declutter($uri);
1.288 albertel 3543: # if it is a non metadata possible uri return quickly
1.293 matthew 3544: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3545: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|)) {
1.288 albertel 3546: return '';
3547: }
1.73 www 3548: my $filename=$uri;
3549: $uri=~s/\.meta$//;
1.172 www 3550: #
3551: # Is the metadata already cached?
1.177 www 3552: # Look at timestamp of caching
1.172 www 3553: # Everything is cached by the main uri, libraries are never directly cached
3554: #
1.277 albertel 3555: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
1.172 www 3556: #
3557: # Is this a recursive call for a library?
3558: #
1.171 www 3559: if ($liburi) {
3560: $liburi=&declutter($liburi);
3561: $filename=$liburi;
1.401 bowersj2 3562: } else {
3563: delete($metacache{$uri.':packages'});
3564: }
1.140 www 3565: my %metathesekeys=();
1.73 www 3566: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
1.335 albertel 3567: my $metastring=&getfile(&filelocation('',&clutter($filename)));
1.208 albertel 3568: my $parser=HTML::LCParser->new(\$metastring);
1.71 www 3569: my $token;
1.140 www 3570: undef %metathesekeys;
1.71 www 3571: while ($token=$parser->get_token) {
1.339 albertel 3572: if ($token->[0] eq 'S') {
3573: if (defined($token->[2]->{'package'})) {
1.172 www 3574: #
3575: # This is a package - get package info
3576: #
1.339 albertel 3577: my $package=$token->[2]->{'package'};
3578: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3579: if (defined($token->[2]->{'id'})) {
3580: $keyroot.='_'.$token->[2]->{'id'};
3581: }
3582: if ($metacache{$uri.':packages'}) {
3583: $metacache{$uri.':packages'}.=','.$package.$keyroot;
3584: } else {
3585: $metacache{$uri.':packages'}=$package.$keyroot;
3586: }
3587: foreach (keys %packagetab) {
3588: if ($_=~/^$package\&/) {
3589: my ($pack,$name,$subp)=split(/\&/,$_);
1.395 albertel 3590: # ignore package.tab specified default values
3591: # here &package_tab_default() will fetch those
3592: if ($subp eq 'default') { next; }
1.339 albertel 3593: my $value=$packagetab{$_};
3594: my $part=$keyroot;
3595: $part=~s/^\_//;
3596: if ($subp eq 'display') {
3597: $value.=' [Part: '.$part.']';
3598: }
3599: my $unikey='parameter'.$keyroot.'_'.$name;
1.395 albertel 3600: $metacache{$uri.':'.$unikey.'.part'}=$part;
3601: $metathesekeys{$unikey}=1;
1.339 albertel 3602: unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
3603: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
3604: }
3605: if (defined($metacache{$uri.':'.$unikey.'.default'})) {
3606: $metacache{$uri.':'.$unikey}=
1.356 albertel 3607: $metacache{$uri.':'.$unikey.'.default'};
3608: }
1.339 albertel 3609: }
3610: }
3611: } else {
1.172 www 3612: #
3613: # This is not a package - some other kind of start tag
1.339 albertel 3614: #
3615: my $entry=$token->[1];
3616: my $unikey;
3617: if ($entry eq 'import') {
3618: $unikey='';
3619: } else {
3620: $unikey=$entry;
3621: }
3622: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3623:
3624: if (defined($token->[2]->{'id'})) {
3625: $unikey.='_'.$token->[2]->{'id'};
3626: }
1.175 www 3627:
1.339 albertel 3628: if ($entry eq 'import') {
1.175 www 3629: #
3630: # Importing a library here
1.339 albertel 3631: #
3632: if ($depthcount<20) {
3633: my $location=$parser->get_text('/import');
3634: my $dir=$filename;
3635: $dir=~s|[^/]*$||;
3636: $location=&filelocation($dir,$location);
3637: foreach (sort(split(/\,/,&metadata($uri,'keys',
3638: $location,$unikey,
3639: $depthcount+1)))) {
3640: $metathesekeys{$_}=1;
3641: }
3642: }
3643: } else {
3644:
3645: if (defined($token->[2]->{'name'})) {
3646: $unikey.='_'.$token->[2]->{'name'};
3647: }
3648: $metathesekeys{$unikey}=1;
3649: foreach (@{$token->[3]}) {
3650: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
3651: }
3652: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
3653: my $default=$metacache{$uri.':'.$unikey.'.default'};
3654: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
3655: # only ws inside the tag, and not in default, so use default
3656: # as value
3657: $metacache{$uri.':'.$unikey}=$default;
3658: } else {
1.321 albertel 3659: # either something interesting inside the tag or default
3660: # uninteresting
1.339 albertel 3661: $metacache{$uri.':'.$unikey}=$internaltext;
3662: }
1.172 www 3663: # end of not-a-package not-a-library import
1.339 albertel 3664: }
1.172 www 3665: # end of not-a-package start tag
1.339 albertel 3666: }
1.172 www 3667: # the next is the end of "start tag"
1.339 albertel 3668: }
3669: }
1.338 www 3670: # are there custom rights to evaluate
3671: if ($metacache{$uri.':copyright'} eq 'custom') {
1.339 albertel 3672:
1.338 www 3673: #
3674: # Importing a rights file here
1.339 albertel 3675: #
3676: unless ($depthcount) {
3677: my $location=$metacache{$uri.':customdistributionfile'};
3678: my $dir=$filename;
3679: $dir=~s|[^/]*$||;
3680: $location=&filelocation($dir,$location);
3681: foreach (sort(split(/\,/,&metadata($uri,'keys',
3682: $location,'_rights',
3683: $depthcount+1)))) {
3684: $metathesekeys{$_}=1;
3685: }
3686: }
3687: }
3688: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
1.261 albertel 3689: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
1.339 albertel 3690: $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
3691: $metacache{$uri.':cachedtimestamp'}=time;
1.177 www 3692: # this is the end of "was not already recently cached
1.71 www 3693: }
3694: return $metacache{$uri.':'.$what};
1.261 albertel 3695: }
3696:
3697: sub metadata_generate_part0 {
3698: my ($metadata,$metacache,$uri) = @_;
3699: my %allnames;
3700: foreach my $metakey (sort keys %$metadata) {
3701: if ($metakey=~/^parameter\_(.*)/) {
3702: my $part=$$metacache{$uri.':'.$metakey.'.part'};
3703: my $name=$$metacache{$uri.':'.$metakey.'.name'};
1.356 albertel 3704: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
1.261 albertel 3705: $allnames{$name}=$part;
3706: }
3707: }
3708: }
3709: foreach my $name (keys(%allnames)) {
3710: $$metadata{"parameter_0_$name"}=1;
3711: my $key="$uri:parameter_0_$name";
3712: $$metacache{"$key.part"}='0';
3713: $$metacache{"$key.name"}=$name;
3714: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
3715: $allnames{$name}.'_'.$name.
3716: '.type'};
3717: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
3718: '.display'};
3719: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3720: $olddis=~s/$expr/\[Part: 0\]/;
3721: $$metacache{"$key.display"}=$olddis;
3722: }
1.71 www 3723: }
3724:
1.301 www 3725: # ------------------------------------------------- Get the title of a resource
3726:
3727: sub gettitle {
3728: my $urlsymb=shift;
3729: my $symb=&symbread($urlsymb);
3730: unless ($symb) {
3731: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3732: return &metadata($urlsymb,'title');
3733: }
1.382 albertel 3734: if ($titlecache{$symb}) {
3735: if (time < ($titlecache{$symb}[1] + 600)) {
3736: return $titlecache{$symb}[0];
3737: } else {
3738: delete($titlecache{$symb});
3739: }
3740: }
1.301 www 3741: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3742: my $title='';
3743: my %bighash;
3744: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3745: &GDBM_READER(),0640)) {
3746: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3747: $title=$bighash{'title_'.$mapid.'.'.$resid};
3748: untie %bighash;
3749: }
1.363 www 3750: $title=~s/\&colon\;/\:/gs;
1.301 www 3751: if ($title) {
1.382 albertel 3752: $titlecache{$symb}=[$title,time];
1.301 www 3753: return $title;
3754: } else {
3755: return &metadata($urlsymb,'title');
3756: }
3757: }
3758:
1.31 www 3759: # ------------------------------------------------- Update symbolic store links
3760:
3761: sub symblist {
3762: my ($mapname,%newhash)=@_;
3763: $mapname=declutter($mapname);
3764: my %hash;
3765: if (($ENV{'request.course.fn'}) && (%newhash)) {
3766: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1.256 albertel 3767: &GDBM_WRCREAT(),0640)) {
1.191 harris41 3768: foreach (keys %newhash) {
1.211 www 3769: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
1.191 harris41 3770: }
1.31 www 3771: if (untie(%hash)) {
3772: return 'ok';
3773: }
3774: }
3775: }
3776: return 'error';
1.212 www 3777: }
3778:
3779: # --------------------------------------------------------------- Verify a symb
3780:
3781: sub symbverify {
3782: my ($symb,$thisfn)=@_;
1.213 www 3783: $thisfn=&declutter($thisfn);
1.215 www 3784: # direct jump to resource in page or to a sequence - will construct own symbs
3785: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
3786: # check URL part
1.213 www 3787: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3788: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
3789:
1.216 www 3790: $symb=&symbclean($symb);
1.213 www 3791:
3792: my %bighash;
3793: my $okay=0;
3794: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1.256 albertel 3795: &GDBM_READER(),0640)) {
1.280 www 3796: my $ids=$bighash{'ids_'.&clutter($thisfn)};
1.216 www 3797: unless ($ids) {
3798: $ids=$bighash{'ids_/'.$thisfn};
3799: }
3800: if ($ids) {
3801: # ------------------------------------------------------------------- Has ID(s)
3802: foreach (split(/\,/,$ids)) {
3803: my ($mapid,$resid)=split(/\./,$_);
3804: if (
3805: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
3806: eq $symb) {
3807: $okay=1;
3808: }
3809: }
3810: }
1.213 www 3811: untie(%bighash);
3812: }
3813: return $okay;
1.31 www 3814: }
3815:
1.210 www 3816: # --------------------------------------------------------------- Clean-up symb
3817:
3818: sub symbclean {
3819: my $symb=shift;
1.213 www 3820:
1.210 www 3821: # remove version from map
3822: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
1.215 www 3823:
1.210 www 3824: # remove version from URL
3825: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
1.213 www 3826:
1.210 www 3827: return $symb;
3828: }
3829:
1.31 www 3830: # ------------------------------------------------------ Return symb list entry
3831:
3832: sub symbread {
1.249 www 3833: my ($thisfn,$donotrecurse)=@_;
1.242 www 3834: # no filename provided? try from environment
1.44 www 3835: unless ($thisfn) {
1.210 www 3836: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
1.44 www 3837: $thisfn=$ENV{'request.filename'};
3838: }
1.242 www 3839: # is that filename actually a symb? Verify, clean, and return
3840: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
3841: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
3842: }
1.44 www 3843: $thisfn=declutter($thisfn);
1.31 www 3844: my %hash;
1.37 www 3845: my %bighash;
3846: my $syval='';
1.45 www 3847: if (($ENV{'request.course.fn'}) && ($thisfn)) {
1.31 www 3848: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1.256 albertel 3849: &GDBM_READER(),0640)) {
1.31 www 3850: $syval=$hash{$thisfn};
1.37 www 3851: untie(%hash);
3852: }
3853: # ---------------------------------------------------------- There was an entry
3854: if ($syval) {
3855: unless ($syval=~/\_\d+$/) {
3856: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
1.44 www 3857: &appenv('request.ambiguous' => $thisfn);
1.37 www 3858: return '';
3859: }
3860: $syval.=$1;
3861: }
3862: } else {
3863: # ------------------------------------------------------- Was not in symb table
3864: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1.256 albertel 3865: &GDBM_READER(),0640)) {
1.37 www 3866: # ---------------------------------------------- Get ID(s) for current resource
1.280 www 3867: my $ids=$bighash{'ids_'.&clutter($thisfn)};
1.65 www 3868: unless ($ids) {
3869: $ids=$bighash{'ids_/'.$thisfn};
1.242 www 3870: }
3871: unless ($ids) {
3872: # alias?
3873: $ids=$bighash{'mapalias_'.$thisfn};
1.65 www 3874: }
1.37 www 3875: if ($ids) {
3876: # ------------------------------------------------------------------- Has ID(s)
3877: my @possibilities=split(/\,/,$ids);
1.39 www 3878: if ($#possibilities==0) {
3879: # ----------------------------------------------- There is only one possibility
1.37 www 3880: my ($mapid,$resid)=split(/\./,$ids);
3881: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
1.249 www 3882: } elsif (!$donotrecurse) {
1.39 www 3883: # ------------------------------------------ There is more than one possibility
3884: my $realpossible=0;
1.191 harris41 3885: foreach (@possibilities) {
1.39 www 3886: my $file=$bighash{'src_'.$_};
3887: if (&allowed('bre',$file)) {
3888: my ($mapid,$resid)=split(/\./,$_);
3889: if ($bighash{'map_type_'.$mapid} ne 'page') {
3890: $realpossible++;
3891: $syval=declutter($bighash{'map_id_'.$mapid}).
3892: '___'.$resid;
3893: }
3894: }
1.191 harris41 3895: }
1.39 www 3896: if ($realpossible!=1) { $syval=''; }
1.249 www 3897: } else {
3898: $syval='';
1.37 www 3899: }
3900: }
3901: untie(%bighash)
3902: }
1.31 www 3903: }
1.62 www 3904: if ($syval) {
1.210 www 3905: return &symbclean($syval.'___'.$thisfn);
1.62 www 3906: }
1.31 www 3907: }
1.44 www 3908: &appenv('request.ambiguous' => $thisfn);
1.31 www 3909: return '';
3910: }
3911:
3912: # ---------------------------------------------------------- Return random seed
3913:
1.32 www 3914: sub numval {
3915: my $txt=shift;
3916: $txt=~tr/A-J/0-9/;
3917: $txt=~tr/a-j/0-9/;
3918: $txt=~tr/K-T/0-9/;
3919: $txt=~tr/k-t/0-9/;
3920: $txt=~tr/U-Z/0-5/;
3921: $txt=~tr/u-z/0-5/;
3922: $txt=~s/\D//g;
3923: return int($txt);
1.368 albertel 3924: }
3925:
3926: sub latest_rnd_algorithm_id {
3927: return '64bit';
1.366 albertel 3928: }
1.32 www 3929:
1.31 www 3930: sub rndseed {
1.155 albertel 3931: my ($symb,$courseid,$domain,$username)=@_;
1.366 albertel 3932:
3933: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
1.155 albertel 3934: if (!$symb) {
1.366 albertel 3935: unless ($symb=$wsymb) { return time; }
3936: }
3937: if (!$courseid) { $courseid=$wcourseid; }
3938: if (!$domain) { $domain=$wdomain; }
3939: if (!$username) { $username=$wusername }
3940: my $which=$ENV{"course.$courseid.rndseed"};
3941: my $CODE=$ENV{'scantron.CODE'};
3942: if (defined($CODE)) {
3943: &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
3944: } elsif ($which eq '64bit') {
3945: return &rndseed_64bit($symb,$courseid,$domain,$username);
3946: }
3947: return &rndseed_32bit($symb,$courseid,$domain,$username);
3948: }
3949:
3950: sub rndseed_32bit {
3951: my ($symb,$courseid,$domain,$username)=@_;
3952: {
3953: use integer;
3954: my $symbchck=unpack("%32C*",$symb) << 27;
3955: my $symbseed=numval($symb) << 22;
3956: my $namechck=unpack("%32C*",$username) << 17;
3957: my $nameseed=numval($username) << 12;
3958: my $domainseed=unpack("%32C*",$domain) << 7;
3959: my $courseseed=unpack("%32C*",$courseid);
3960: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
3961: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
3962: #&Apache::lonxml::debug("rndseed :$num:$symb");
3963: return $num;
3964: }
3965: }
3966:
3967: sub rndseed_64bit {
3968: my ($symb,$courseid,$domain,$username)=@_;
3969: {
3970: use integer;
3971: my $symbchck=unpack("%32S*",$symb) << 21;
3972: my $symbseed=numval($symb) << 10;
3973: my $namechck=unpack("%32S*",$username);
3974:
3975: my $nameseed=numval($username) << 21;
3976: my $domainseed=unpack("%32S*",$domain) << 10;
3977: my $courseseed=unpack("%32S*",$courseid);
3978:
3979: my $num1=$symbchck+$symbseed+$namechck;
3980: my $num2=$nameseed+$domainseed+$courseseed;
3981: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
3982: #&Apache::lonxml::debug("rndseed :$num:$symb");
3983: return "$num1,$num2";
1.155 albertel 3984: }
1.366 albertel 3985: }
3986:
3987: sub rndseed_CODE_64bit {
3988: my ($symb,$courseid,$domain,$username)=@_;
1.155 albertel 3989: {
1.366 albertel 3990: use integer;
3991: my $symbchck=unpack("%32S*",$symb) << 16;
3992: my $symbseed=numval($symb);
3993: my $CODEseed=numval($ENV{'scantron.CODE'}) << 16;
3994: my $courseseed=unpack("%32S*",$courseid);
3995: my $num1=$symbseed+$CODEseed;
3996: my $num2=$courseseed+$symbchck;
3997: #&Apache::lonxml::debug("$symbseed:$CODEseed|$courseseed:$symbchck");
3998: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
3999: return "$num1,$num2";
4000: }
4001: }
4002:
4003: sub setup_random_from_rndseed {
4004: my ($rndseed)=@_;
4005: if ($rndseed =~/,/) {
4006: my ($num1,$num2)=split(/,/,$rndseed);
4007: &Math::Random::random_set_seed(abs($num1),abs($num2));
4008: } else {
4009: &Math::Random::random_set_seed_from_phrase($rndseed);
1.98 albertel 4010: }
1.36 albertel 4011: }
4012:
1.76 www 4013: sub ireceipt {
4014: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
4015: my $cuname=unpack("%32C*",$funame);
4016: my $cudom=unpack("%32C*",$fudom);
4017: my $cucourseid=unpack("%32C*",$fucourseid);
4018: my $cusymb=unpack("%32C*",$fusymb);
1.77 www 4019: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
1.76 www 4020: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
4021: ($cunique%$cuname+
4022: $cunique%$cudom+
4023: $cusymb%$cuname+
4024: $cusymb%$cudom+
4025: $cucourseid%$cuname+
4026: $cucourseid%$cudom);
4027: }
4028:
4029: sub receipt {
1.260 ng 4030: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
4031: return &ireceipt($name,$domain,$courseid,$symb);
1.76 www 4032: }
1.260 ng 4033:
1.36 albertel 4034: # ------------------------------------------------------------ Serves up a file
4035: # returns either the contents of the file or a -1
4036: sub getfile {
1.269 www 4037: my $file=shift;
4038: if ($file=~/^\/*uploaded\//) { # user file
4039: my $ua=new LWP::UserAgent;
4040: my $request=new HTTP::Request('GET',&tokenwrapper($file));
4041: my $response=$ua->request($request);
4042: if ($response->is_success()) {
4043: return $response->content;
4044: } else {
4045: return -1;
4046: }
4047: } else { # normal file from res space
1.37 www 4048: &repcopy($file);
1.36 albertel 4049: if (! -e $file ) { return -1; };
4050: my $fh=Apache::File->new($file);
4051: my $a='';
4052: while (<$fh>) { $a .=$_; }
1.269 www 4053: return $a;
4054: }
1.36 albertel 4055: }
4056:
4057: sub filelocation {
4058: my ($dir,$file) = @_;
4059: my $location;
4060: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
1.59 albertel 4061: if ($file=~m:^/~:) { # is a contruction space reference
4062: $location = $file;
4063: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
1.270 www 4064: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
4065: $location=$file;
1.36 albertel 4066: } else {
1.59 albertel 4067: $file=~s/^$perlvar{'lonDocRoot'}//;
4068: $file=~s:^/*res::;
4069: if ( !( $file =~ m:^/:) ) {
4070: $location = $dir. '/'.$file;
4071: } else {
4072: $location = '/home/httpd/html/res'.$file;
4073: }
1.36 albertel 4074: }
4075: $location=~s://+:/:g; # remove duplicate /
1.46 www 4076: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
4077: return $location;
4078: }
1.36 albertel 4079:
1.46 www 4080: sub hreflocation {
4081: my ($dir,$file)=@_;
1.191 harris41 4082: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
1.46 www 4083: my $finalpath=filelocation($dir,$file);
4084: $finalpath=~s/^\/home\/httpd\/html//;
1.225 albertel 4085: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
1.46 www 4086: return $finalpath;
4087: } else {
4088: return $file;
4089: }
1.31 www 4090: }
4091:
4092: # ------------------------------------------------------------- Declutters URLs
4093:
4094: sub declutter {
4095: my $thisfn=shift;
4096: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
4097: $thisfn=~s/^\///;
4098: $thisfn=~s/^res\///;
1.235 www 4099: $thisfn=~s/\?.+$//;
1.268 www 4100: return $thisfn;
4101: }
4102:
4103: # ------------------------------------------------------------- Clutter up URLs
4104:
4105: sub clutter {
4106: my $thisfn='/'.&declutter(shift);
1.270 www 4107: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
4108: $thisfn='/res'.$thisfn;
4109: }
1.31 www 4110: return $thisfn;
1.12 www 4111: }
4112:
4113: # -------------------------------------------------------- Escape Special Chars
4114:
4115: sub escape {
4116: my $str=shift;
4117: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
4118: return $str;
4119: }
4120:
4121: # ----------------------------------------------------- Un-Escape Special Chars
4122:
4123: sub unescape {
4124: my $str=shift;
4125: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
4126: return $str;
4127: }
1.11 www 4128:
1.1 albertel 4129: # ================================================================ Main Program
4130:
1.184 www 4131: sub goodbye {
1.204 albertel 4132: &logthis("Starting Shut down");
1.184 www 4133: &flushcourselogs();
4134: &logthis("Shutting down");
1.362 albertel 4135: return DONE;
1.184 www 4136: }
4137:
1.179 www 4138: BEGIN {
1.228 harris41 4139: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
1.195 www 4140: unless ($readit) {
1.217 harris41 4141: {
4142: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
4143:
4144: while (my $configline=<$config>) {
4145: if ($configline =~ /^[^\#]*PerlSetVar/) {
1.1 albertel 4146: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
1.8 www 4147: chomp($varvalue);
1.1 albertel 4148: $perlvar{$varname}=$varvalue;
4149: }
4150: }
4151: }
1.227 harris41 4152: {
4153: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
4154:
4155: while (my $configline=<$config>) {
4156: if ($configline =~ /^[^\#]*PerlSetVar/) {
4157: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
4158: chomp($varvalue);
4159: $perlvar{$varname}=$varvalue;
4160: }
4161: }
4162: }
1.1 albertel 4163:
1.327 albertel 4164: # ------------------------------------------------------------ Read domain file
4165: {
4166: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
4167: '/domain.tab');
4168: %domaindescription = ();
4169: %domain_auth_def = ();
4170: %domain_auth_arg_def = ();
4171: if ($fh) {
4172: while (<$fh>) {
1.390 matthew 4173: next if (/^(\#|\s*$)/);
4174: # next if /^\#/;
1.327 albertel 4175: chomp;
1.403 ! www 4176: my ($domain, $domain_description, $def_auth, $def_auth_arg,
! 4177: $def_lang, $city, $longi, $lati) = split(/:/,$_);
! 4178: $domain_auth_def{$domain}=$def_auth;
1.327 albertel 4179: $domain_auth_arg_def{$domain}=$def_auth_arg;
1.403 ! www 4180: $domaindescription{$domain}=$domain_description;
! 4181: $domain_lang_def{$domain}=$def_lang;
! 4182: $domain_city{$domain}=$city;
! 4183: $domain_longi{$domain}=$longi;
! 4184: $domain_lati{$domain}=$lati;
! 4185:
1.327 albertel 4186: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
4187: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
4188: }
4189: }
4190: }
4191:
4192:
1.1 albertel 4193: # ------------------------------------------------------------- Read hosts file
4194: {
4195: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
4196:
4197: while (my $configline=<$config>) {
1.303 matthew 4198: next if ($configline =~ /^(\#|\s*$)/);
1.154 www 4199: chomp($configline);
1.245 www 4200: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
1.252 albertel 4201: if ($id && $domain && $role && $name && $ip) {
4202: $hostname{$id}=$name;
4203: $hostdom{$id}=$domain;
4204: $hostip{$id}=$ip;
1.300 albertel 4205: $iphost{$ip}=$id;
1.252 albertel 4206: if ($role eq 'library') { $libserv{$id}=$name; }
4207: } else {
4208: if ($configline) {
4209: &logthis("Skipping hosts.tab line -$configline-");
4210: }
1.245 www 4211: }
1.1 albertel 4212: }
4213: }
4214:
4215: # ------------------------------------------------------ Read spare server file
4216: {
4217: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
4218:
4219: while (my $configline=<$config>) {
4220: chomp($configline);
1.284 matthew 4221: if ($configline) {
1.1 albertel 4222: $spareid{$configline}=1;
4223: }
4224: }
4225: }
1.11 www 4226: # ------------------------------------------------------------ Read permissions
4227: {
4228: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
4229:
4230: while (my $configline=<$config>) {
4231: chomp($configline);
1.160 www 4232: if ($configline) {
1.11 www 4233: my ($role,$perm)=split(/ /,$configline);
4234: if ($perm ne '') { $pr{$role}=$perm; }
1.160 www 4235: }
1.11 www 4236: }
4237: }
4238:
4239: # -------------------------------------------- Read plain texts for permissions
4240: {
4241: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
4242:
4243: while (my $configline=<$config>) {
4244: chomp($configline);
1.160 www 4245: if ($configline) {
1.11 www 4246: my ($short,$plain)=split(/:/,$configline);
4247: if ($plain ne '') { $prp{$short}=$plain; }
1.160 www 4248: }
1.135 www 4249: }
4250: }
4251:
4252: # ---------------------------------------------------------- Read package table
4253: {
4254: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
4255:
4256: while (my $configline=<$config>) {
4257: chomp($configline);
4258: my ($short,$plain)=split(/:/,$configline);
1.143 www 4259: my ($pack,$name)=split(/\&/,$short);
4260: if ($plain ne '') {
4261: $packagetab{$pack.'&'.$name.'&name'}=$name;
4262: $packagetab{$short}=$plain;
1.25 www 4263: }
1.11 www 4264: }
1.329 matthew 4265: }
4266:
4267: # ------------- set up temporary directory
4268: {
4269: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
4270:
1.11 www 4271: }
4272:
1.71 www 4273: %metacache=();
1.185 www 4274:
1.281 www 4275: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
1.186 www 4276: $dumpcount=0;
1.22 www 4277:
1.163 harris41 4278: &logtouch();
1.12 www 4279: &logthis('<font color=yellow>INFO: Read configuration</font>');
1.195 www 4280: $readit=1;
4281: }
1.1 albertel 4282: }
1.179 www 4283:
1.1 albertel 4284: 1;
1.191 harris41 4285: __END__
4286:
1.243 albertel 4287: =pod
4288:
1.191 harris41 4289: =head1 NAME
4290:
1.243 albertel 4291: Apache::lonnet - Subroutines to ask questions about things in the network.
1.191 harris41 4292:
4293: =head1 SYNOPSIS
4294:
1.243 albertel 4295: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
1.191 harris41 4296:
4297: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
4298:
1.243 albertel 4299: Common parameters:
4300:
4301: =over 4
4302:
4303: =item *
4304:
4305: $uname : an internal username (if $cname expecting a course Id specifically)
4306:
4307: =item *
4308:
4309: $udom : a domain (if $cdom expecting a course's domain specifically)
4310:
4311: =item *
4312:
4313: $symb : a resource instance identifier
4314:
4315: =item *
4316:
4317: $namespace : the name of a .db file that contains the data needed or
4318: being set.
4319:
4320: =back
4321:
1.394 bowersj2 4322: =head1 OVERVIEW
1.191 harris41 4323:
1.394 bowersj2 4324: lonnet provides subroutines which interact with the
4325: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
4326: about classes, users, and resources.
1.243 albertel 4327:
4328: For many of these objects you can also use this to store data about
4329: them or modify them in various ways.
1.191 harris41 4330:
1.394 bowersj2 4331: =head2 Symbs
1.191 harris41 4332:
1.394 bowersj2 4333: To identify a specific instance of a resource, LON-CAPA uses symbols
4334: or "symbs"X<symb>. These identifiers are built from the URL of the
4335: map, the resource number of the resource in the map, and the URL of
4336: the resource itself. The latter is somewhat redundant, but might help
4337: if maps change.
4338:
4339: An example is
4340:
4341: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
4342:
4343: The respective map entry is
4344:
4345: <resource id="19" src="/res/msu/korte/tests/part12.problem"
4346: title="Problem 2">
4347: </resource>
4348:
4349: Symbs are used by the random number generator, as well as to store and
4350: restore data specific to a certain instance of for example a problem.
4351:
4352: =head2 Storing And Retrieving Data
4353:
4354: X<store()>X<cstore()>X<restore()>Three of the most important functions
4355: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
4356: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
4357: is is the non-critical message twin of cstore. These functions are for
4358: handlers to store a perl hash to a user's permanent data space in an
4359: easy manner, and to retrieve it again on another call. It is expected
4360: that a handler would use this once at the beginning to retrieve data,
4361: and then again once at the end to send only the new data back.
4362:
4363: The data is stored in the user's data directory on the user's
4364: homeserver under the ID of the course.
4365:
4366: The hash that is returned by restore will have all of the previous
4367: value for all of the elements of the hash.
4368:
4369: Example:
4370:
4371: #creating a hash
4372: my %hash;
4373: $hash{'foo'}='bar';
4374:
4375: #storing it
4376: &Apache::lonnet::cstore(\%hash);
4377:
4378: #changing a value
4379: $hash{'foo'}='notbar';
4380:
4381: #adding a new value
4382: $hash{'bar'}='foo';
4383: &Apache::lonnet::cstore(\%hash);
4384:
4385: #retrieving the hash
4386: my %history=&Apache::lonnet::restore();
4387:
4388: #print the hash
4389: foreach my $key (sort(keys(%history))) {
4390: print("\%history{$key} = $history{$key}");
4391: }
4392:
4393: Will print out:
1.191 harris41 4394:
1.394 bowersj2 4395: %history{1:foo} = bar
4396: %history{1:keys} = foo:timestamp
4397: %history{1:timestamp} = 990455579
4398: %history{2:bar} = foo
4399: %history{2:foo} = notbar
4400: %history{2:keys} = foo:bar:timestamp
4401: %history{2:timestamp} = 990455580
4402: %history{bar} = foo
4403: %history{foo} = notbar
4404: %history{timestamp} = 990455580
4405: %history{version} = 2
4406:
4407: Note that the special hash entries C<keys>, C<version> and
4408: C<timestamp> were added to the hash. C<version> will be equal to the
4409: total number of versions of the data that have been stored. The
4410: C<timestamp> attribute will be the UNIX time the hash was
4411: stored. C<keys> is available in every historical section to list which
4412: keys were added or changed at a specific historical revision of a
4413: hash.
4414:
4415: B<Warning>: do not store the hash that restore returns directly. This
4416: will cause a mess since it will restore the historical keys as if the
4417: were new keys. I.E. 1:foo will become 1:1:foo etc.
1.191 harris41 4418:
1.394 bowersj2 4419: Calling convention:
1.191 harris41 4420:
1.394 bowersj2 4421: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
4422: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
1.191 harris41 4423:
1.394 bowersj2 4424: For more detailed information, see lonnet specific documentation.
1.191 harris41 4425:
1.394 bowersj2 4426: =head1 RETURN MESSAGES
1.191 harris41 4427:
1.394 bowersj2 4428: =over 4
1.191 harris41 4429:
1.394 bowersj2 4430: =item * B<con_lost>: unable to contact remote host
1.191 harris41 4431:
1.394 bowersj2 4432: =item * B<con_delayed>: unable to contact remote host, message will be delivered
4433: when the connection is brought back up
1.191 harris41 4434:
1.394 bowersj2 4435: =item * B<con_failed>: unable to contact remote host and unable to save message
4436: for later delivery
1.191 harris41 4437:
1.394 bowersj2 4438: =item * B<error:>: an error a occured, a description of the error follows the :
1.191 harris41 4439:
1.394 bowersj2 4440: =item * B<no_such_host>: unable to fund a host associated with the user/domain
1.243 albertel 4441: that was requested
1.191 harris41 4442:
1.243 albertel 4443: =back
1.191 harris41 4444:
1.243 albertel 4445: =head1 PUBLIC SUBROUTINES
1.191 harris41 4446:
1.243 albertel 4447: =head2 Session Environment Functions
1.191 harris41 4448:
1.243 albertel 4449: =over 4
1.191 harris41 4450:
1.394 bowersj2 4451: =item *
4452: X<appenv()>
4453: B<appenv(%hash)>: the value of %hash is written to
4454: the user envirnoment file, and will be restored for each access this
4455: user makes during this session, also modifies the %ENV for the current
4456: process
1.191 harris41 4457:
4458: =item *
1.394 bowersj2 4459: X<delenv()>
4460: B<delenv($regexp)>: removes all items from the session
4461: environment file that matches the regular expression in $regexp. The
4462: values are also delted from the current processes %ENV.
1.191 harris41 4463:
1.243 albertel 4464: =back
4465:
4466: =head2 User Information
1.191 harris41 4467:
1.243 albertel 4468: =over 4
1.191 harris41 4469:
4470: =item *
1.394 bowersj2 4471: X<queryauthenticate()>
4472: B<queryauthenticate($uname,$udom)>: try to determine user's current
1.191 harris41 4473: authentication scheme
4474:
4475: =item *
1.394 bowersj2 4476: X<authenticate()>
4477: B<authenticate($uname,$upass,$udom)>: try to
4478: authenticate user from domain's lib servers (first use the current
4479: one). C<$upass> should be the users password.
1.191 harris41 4480:
4481: =item *
1.394 bowersj2 4482: X<homeserver()>
4483: B<homeserver($uname,$udom)>: find the server which has
4484: the user's directory and files (there must be only one), this caches
4485: the answer, and also caches if there is a borken connection.
1.191 harris41 4486:
4487: =item *
1.394 bowersj2 4488: X<idget()>
4489: B<idget($udom,@ids)>: find the usernames behind a list of IDs
4490: (IDs are a unique resource in a domain, there must be only 1 ID per
4491: username, and only 1 username per ID in a specific domain) (returns
4492: hash: id=>name,id=>name)
1.191 harris41 4493:
4494: =item *
1.394 bowersj2 4495: X<idrget()>
4496: B<idrget($udom,@unames)>: find the IDs behind a list of
4497: usernames (returns hash: name=>id,name=>id)
1.191 harris41 4498:
4499: =item *
1.394 bowersj2 4500: X<idput()>
4501: B<idput($udom,%ids)>: store away a list of names and associated IDs
1.191 harris41 4502:
4503: =item *
1.394 bowersj2 4504: X<rolesinit()>
4505: B<rolesinit($udom,$username,$authhost)>: get user privileges
1.243 albertel 4506:
4507: =item *
1.394 bowersj2 4508: X<usection()>
4509: B<usection($udom,$uname,$cname)>: finds the section of student in the
1.243 albertel 4510: course $cname, return section name/number or '' for "not in course"
4511: and '-1' for "no section"
4512:
4513: =item *
1.394 bowersj2 4514: X<userenvironment()>
4515: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
1.243 albertel 4516: passed in @what from the requested user's environment, returns a hash
4517:
4518: =back
4519:
4520: =head2 User Roles
4521:
4522: =over 4
4523:
4524: =item *
4525:
4526: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
4527: actions
4528: F: full access
4529: U,I,K: authentication modes (cxx only)
4530: '': forbidden
4531: 1: user needs to choose course
4532: 2: browse allowed
4533:
4534: =item *
4535:
4536: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
4537: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
4538: and course level
4539:
4540: =item *
4541:
4542: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
4543: explanation of a user role term
4544:
4545: =back
4546:
4547: =head2 User Modification
4548:
4549: =over 4
4550:
4551: =item *
4552:
4553: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
4554: user for the level given by URL. Optional start and end dates (leave empty
4555: string or zero for "no date")
1.191 harris41 4556:
4557: =item *
4558:
1.243 albertel 4559: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
4560: change a users, password, possible return values are: ok,
4561: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
4562: refused
1.191 harris41 4563:
4564: =item *
4565:
1.243 albertel 4566: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
1.191 harris41 4567:
4568: =item *
4569:
1.243 albertel 4570: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
4571: modify user
1.191 harris41 4572:
4573: =item *
4574:
1.286 matthew 4575: modifystudent
4576:
4577: modify a students enrollment and identification information.
4578: The course id is resolved based on the current users environment.
4579: This means the envoking user must be a course coordinator or otherwise
4580: associated with a course.
4581:
1.297 matthew 4582: This call is essentially a wrapper for lonnet::modifyuser and
4583: lonnet::modify_student_enrollment
1.286 matthew 4584:
4585: Inputs:
4586:
4587: =over 4
4588:
4589: =item B<$udom> Students loncapa domain
4590:
4591: =item B<$uname> Students loncapa login name
4592:
4593: =item B<$uid> Students id/student number
4594:
4595: =item B<$umode> Students authentication mode
4596:
4597: =item B<$upass> Students password
4598:
4599: =item B<$first> Students first name
4600:
4601: =item B<$middle> Students middle name
4602:
4603: =item B<$last> Students last name
4604:
4605: =item B<$gene> Students generation
4606:
4607: =item B<$usec> Students section in course
4608:
4609: =item B<$end> Unix time of the roles expiration
4610:
4611: =item B<$start> Unix time of the roles start date
4612:
4613: =item B<$forceid> If defined, allow $uid to be changed
4614:
4615: =item B<$desiredhome> server to use as home server for student
4616:
4617: =back
1.297 matthew 4618:
4619: =item *
4620:
4621: modify_student_enrollment
4622:
4623: Change a students enrollment status in a class. The environment variable
4624: 'role.request.course' must be defined for this function to proceed.
4625:
4626: Inputs:
4627:
4628: =over 4
4629:
4630: =item $udom, students domain
4631:
4632: =item $uname, students name
4633:
4634: =item $uid, students user id
4635:
4636: =item $first, students first name
4637:
4638: =item $middle
4639:
4640: =item $last
4641:
4642: =item $gene
4643:
4644: =item $usec
4645:
4646: =item $end
4647:
4648: =item $start
4649:
4650: =back
4651:
1.191 harris41 4652:
4653: =item *
4654:
1.243 albertel 4655: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
4656: custom role; give a custom role to a user for the level given by URL. Specify
4657: name and domain of role author, and role name
1.191 harris41 4658:
4659: =item *
4660:
1.243 albertel 4661: revokerole($udom,$uname,$url,$role) : revoke a role for url
1.191 harris41 4662:
4663: =item *
4664:
1.243 albertel 4665: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
4666:
4667: =back
4668:
4669: =head2 Course Infomation
4670:
4671: =over 4
1.191 harris41 4672:
4673: =item *
4674:
1.243 albertel 4675: coursedescription($courseid) : course description
1.191 harris41 4676:
4677: =item *
4678:
1.243 albertel 4679: courseresdata($coursenum,$coursedomain,@which) : request for current
4680: parameter setting for a specific course, @what should be a list of
4681: parameters to ask about. This routine caches answers for 5 minutes.
4682:
4683: =back
4684:
4685: =head2 Course Modification
4686:
4687: =over 4
1.191 harris41 4688:
4689: =item *
4690:
1.243 albertel 4691: writecoursepref($courseid,%prefs) : write preferences (environment
4692: database) for a course
1.191 harris41 4693:
4694: =item *
4695:
1.243 albertel 4696: createcourse($udom,$description,$url) : make/modify course
4697:
4698: =back
4699:
4700: =head2 Resource Subroutines
4701:
4702: =over 4
1.191 harris41 4703:
4704: =item *
4705:
1.243 albertel 4706: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
1.191 harris41 4707:
4708: =item *
4709:
1.243 albertel 4710: repcopy($filename) : subscribes to the requested file, and attempts to
4711: replicate from the owning library server, Might return
4712: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
4713: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
4714: resource. Expects the local filesystem pathname
4715: (/home/httpd/html/res/....)
4716:
4717: =back
4718:
4719: =head2 Resource Information
4720:
4721: =over 4
1.191 harris41 4722:
4723: =item *
4724:
1.243 albertel 4725: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
4726: a vairety of different possible values, $varname should be a request
4727: string, and the other parameters can be used to specify who and what
4728: one is asking about.
4729:
4730: Possible values for $varname are environment.lastname (or other item
4731: from the envirnment hash), user.name (or someother aspect about the
4732: user), resource.0.maxtries (or some other part and parameter of a
4733: resource)
1.204 albertel 4734:
4735: =item *
4736:
1.243 albertel 4737: directcondval($number) : get current value of a condition; reads from a state
4738: string
1.204 albertel 4739:
4740: =item *
4741:
1.243 albertel 4742: condval($condidx) : value of condition index based on state
1.204 albertel 4743:
4744: =item *
4745:
1.243 albertel 4746: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
4747: resource's metadata, $what should be either a specific key, or either
4748: 'keys' (to get a list of possible keys) or 'packages' to get a list of
4749: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
4750:
4751: this function automatically caches all requests
1.191 harris41 4752:
4753: =item *
4754:
1.243 albertel 4755: metadata_query($query,$custom,$customshow) : make a metadata query against the
4756: network of library servers; returns file handle of where SQL and regex results
4757: will be stored for query
1.191 harris41 4758:
4759: =item *
4760:
1.243 albertel 4761: symbread($filename) : return symbolic list entry (filename argument optional);
4762: returns the data handle
1.191 harris41 4763:
4764: =item *
4765:
1.243 albertel 4766: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
4767: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
4768: failure, user must be in a course, as it assumes the existance of the
4769: course initi hash, and uses $ENV('request.course.id'}
4770:
1.191 harris41 4771:
4772: =item *
4773:
1.243 albertel 4774: symbclean($symb) : removes versions numbers from a symb, returns the
4775: cleaned symb
1.191 harris41 4776:
4777: =item *
4778:
1.243 albertel 4779: is_on_map($uri) : checks if the $uri is somewhere on the current
4780: course map, user must be in a course for it to work.
1.191 harris41 4781:
4782: =item *
4783:
1.243 albertel 4784: numval($salt) : return random seed value (addend for rndseed)
1.191 harris41 4785:
4786: =item *
4787:
1.243 albertel 4788: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
4789: a random seed, all arguments are optional, if they aren't sent it uses the
4790: environment to derive them. Note: if symb isn't sent and it can't get one
4791: from &symbread it will use the current time as its return value
1.191 harris41 4792:
4793: =item *
4794:
1.243 albertel 4795: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
4796: unfakeable, receipt
1.191 harris41 4797:
4798: =item *
4799:
1.243 albertel 4800: receipt() : API to ireceipt working off of ENV values; given out to users
1.191 harris41 4801:
4802: =item *
4803:
1.243 albertel 4804: countacc($url) : count the number of accesses to a given URL
1.191 harris41 4805:
4806: =item *
4807:
1.243 albertel 4808: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
1.191 harris41 4809:
4810: =item *
4811:
1.243 albertel 4812: checkin($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 $tcrsid)
1.191 harris41 4813:
4814: =item *
4815:
1.243 albertel 4816: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
1.191 harris41 4817:
4818: =item *
4819:
1.243 albertel 4820: devalidate($symb) : devalidate temporary spreadsheet calculations,
4821: forcing spreadsheet to reevaluate the resource scores next time.
4822:
4823: =back
4824:
4825: =head2 Storing/Retreiving Data
4826:
4827: =over 4
1.191 harris41 4828:
4829: =item *
4830:
1.243 albertel 4831: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
4832: for this url; hashref needs to be given and should be a \%hashname; the
4833: remaining args aren't required and if they aren't passed or are '' they will
4834: be derived from the ENV
1.191 harris41 4835:
4836: =item *
4837:
1.243 albertel 4838: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
4839: uses critical subroutine
1.191 harris41 4840:
4841: =item *
4842:
1.243 albertel 4843: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
4844: all args are optional
1.191 harris41 4845:
4846: =item *
4847:
1.243 albertel 4848: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
4849: works very similar to store/cstore, but all data is stored in a
4850: temporary location and can be reset using tmpreset, $storehash should
4851: be a hash reference, returns nothing on success
1.191 harris41 4852:
4853: =item *
4854:
1.243 albertel 4855: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
4856: similar to restore, but all data is stored in a temporary location and
4857: can be reset using tmpreset. Returns a hash of values on success,
4858: error string otherwise.
1.191 harris41 4859:
4860: =item *
4861:
1.243 albertel 4862: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
4863: deltes all keys for $symb form the temporary storage hash.
1.191 harris41 4864:
4865: =item *
4866:
1.243 albertel 4867: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4868: reference filled in from namesp ($udom and $uname are optional)
1.191 harris41 4869:
4870: =item *
4871:
1.243 albertel 4872: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
4873: namesp ($udom and $uname are optional)
1.191 harris41 4874:
4875: =item *
4876:
1.243 albertel 4877: dump($namespace,$udom,$uname,$regexp) :
4878: dumps the complete (or key matching regexp) namespace into a hash
4879: ($udom, $uname and $regexp are optional)
1.191 harris41 4880:
4881: =item *
4882:
1.243 albertel 4883: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
4884: ($udom and $uname are optional)
1.191 harris41 4885:
4886: =item *
4887:
1.243 albertel 4888: cput($namespace,$storehash,$udom,$uname) : critical put
4889: ($udom and $uname are optional)
1.191 harris41 4890:
4891: =item *
4892:
1.243 albertel 4893: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4894: reference filled in from namesp (encrypts the return communication)
4895: ($udom and $uname are optional)
1.191 harris41 4896:
4897: =item *
4898:
1.243 albertel 4899: log($udom,$name,$home,$message) : write to permanent log for user; use
4900: critical subroutine
4901:
4902: =back
4903:
4904: =head2 Network Status Functions
4905:
4906: =over 4
1.191 harris41 4907:
4908: =item *
4909:
4910: dirlist($uri) : return directory list based on URI
4911:
4912: =item *
4913:
1.243 albertel 4914: spareserver() : find server with least workload from spare.tab
4915:
4916: =back
4917:
4918: =head2 Apache Request
4919:
4920: =over 4
1.191 harris41 4921:
4922: =item *
4923:
1.243 albertel 4924: ssi($url,%hash) : server side include, does a complete request cycle on url to
4925: localhost, posts hash
4926:
4927: =back
4928:
4929: =head2 Data to String to Data
4930:
4931: =over 4
1.191 harris41 4932:
4933: =item *
4934:
1.243 albertel 4935: hash2str(%hash) : convert a hash into a string complete with escaping and '='
4936: and '&' separators, supports elements that are arrayrefs and hashrefs
1.191 harris41 4937:
4938: =item *
4939:
1.243 albertel 4940: hashref2str($hashref) : convert a hashref into a string complete with
4941: escaping and '=' and '&' separators, supports elements that are
4942: arrayrefs and hashrefs
1.191 harris41 4943:
4944: =item *
4945:
1.243 albertel 4946: arrayref2str($arrayref) : convert an arrayref into a string complete
4947: with escaping and '&' separators, supports elements that are arrayrefs
4948: and hashrefs
1.191 harris41 4949:
4950: =item *
4951:
1.243 albertel 4952: str2hash($string) : convert string to hash using unescaping and
4953: splitting on '=' and '&', supports elements that are arrayrefs and
4954: hashrefs
1.191 harris41 4955:
4956: =item *
4957:
1.243 albertel 4958: str2array($string) : convert string to hash using unescaping and
4959: splitting on '&', supports elements that are arrayrefs and hashrefs
4960:
4961: =back
4962:
4963: =head2 Logging Routines
4964:
4965: =over 4
4966:
4967: These routines allow one to make log messages in the lonnet.log and
4968: lonnet.perm logfiles.
1.191 harris41 4969:
4970: =item *
4971:
1.243 albertel 4972: logtouch() : make sure the logfile, lonnet.log, exists
1.191 harris41 4973:
4974: =item *
4975:
1.243 albertel 4976: logthis() : append message to the normal lonnet.log file, it gets
4977: preiodically rolled over and deleted.
1.191 harris41 4978:
4979: =item *
4980:
1.243 albertel 4981: logperm() : append a permanent message to lonnet.perm.log, this log
4982: file never gets deleted by any automated portion of the system, only
4983: messages of critical importance should go in here.
4984:
4985: =back
4986:
4987: =head2 General File Helper Routines
4988:
4989: =over 4
1.191 harris41 4990:
4991: =item *
4992:
1.243 albertel 4993: getfile($file) : returns the entire contents of a file or -1; it
4994: properly subscribes to and replicates the file if neccessary.
1.191 harris41 4995:
4996: =item *
4997:
1.243 albertel 4998: filelocation($dir,$file) : returns file system location of a file
4999: based on URI; meant to be "fairly clean" absolute reference, $dir is a
5000: directory that relative $file lookups are to looked in ($dir of /a/dir
5001: and a file of ../bob will become /a/bob)
1.191 harris41 5002:
5003: =item *
5004:
5005: hreflocation($dir,$file) : returns file system location or a URL; same as
5006: filelocation except for hrefs
5007:
5008: =item *
5009:
5010: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
5011:
1.243 albertel 5012: =back
5013:
5014: =head2 HTTP Helper Routines
5015:
5016: =over 4
5017:
1.191 harris41 5018: =item *
5019:
5020: escape() : unpack non-word characters into CGI-compatible hex codes
5021:
5022: =item *
5023:
5024: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
5025:
1.243 albertel 5026: =back
5027:
5028: =head1 PRIVATE SUBROUTINES
5029:
5030: =head2 Underlying communication routines (Shouldn't call)
5031:
5032: =over 4
5033:
5034: =item *
5035:
5036: subreply() : tries to pass a message to lonc, returns con_lost if incapable
5037:
5038: =item *
5039:
5040: reply() : uses subreply to send a message to remote machine, logs all failures
5041:
5042: =item *
5043:
5044: critical() : passes a critical message to another server; if cannot
5045: get through then place message in connection buffer directory and
5046: returns con_delayed, if incapable of saving message, returns
5047: con_failed
5048:
5049: =item *
5050:
5051: reconlonc() : tries to reconnect lonc client processes.
5052:
5053: =back
5054:
5055: =head2 Resource Access Logging
5056:
5057: =over 4
5058:
5059: =item *
5060:
5061: flushcourselogs() : flush (save) buffer logs and access logs
5062:
5063: =item *
5064:
5065: courselog($what) : save message for course in hash
5066:
5067: =item *
5068:
5069: courseacclog($what) : save message for course using &courselog(). Perform
5070: special processing for specific resource types (problems, exams, quizzes, etc).
5071:
1.191 harris41 5072: =item *
5073:
5074: goodbye() : flush course logs and log shutting down; it is called in srm.conf
5075: as a PerlChildExitHandler
1.243 albertel 5076:
5077: =back
5078:
5079: =head2 Other
5080:
5081: =over 4
5082:
5083: =item *
5084:
5085: symblist($mapname,%newhash) : update symbolic storage links
1.191 harris41 5086:
5087: =back
5088:
5089: =cut
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