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