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