Annotation of loncom/lonnet/perl/lonnet.pm, revision 1.429
1.1 albertel 1: # The LearningOnline Network
2: # TCP networking package
1.12 www 3: #
1.429 ! albertel 4: # $Id: lonnet.pm,v 1.428 2003/10/07 07:20:05 albertel Exp $
1.178 www 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
1.169 harris41 28: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 3/2 Gerd Kortemeyer
51: # 3/19,3/20 Gerd Kortemeyer
52: # 5/26,5/28 Gerd Kortemeyer
53: # 5/30 H. K. Ng
54: # 6/1 Gerd Kortemeyer
55: # July Guy Albertelli
56: # 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20,9/21,9/26,
57: # 10/2 Gerd Kortemeyer
1.179 www 58: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
1.182 matthew 59: # 12/5 Matthew Hall
1.184 www 60: # 12/5 Guy Albertelli
1.190 www 61: # 12/6,12/7,12/12 Gerd Kortemeyer
1.195 www 62: # 12/21,12/22,12/27,12/28 Gerd Kortemeyer
1.196 www 63: # YEAR=2002
1.200 www 64: # 1/4,2/4,2/7 Gerd Kortemeyer
1.171 www 65: #
1.169 harris41 66: ###
67:
1.1 albertel 68: package Apache::lonnet;
69:
70: use strict;
71: use Apache::File;
1.8 www 72: use LWP::UserAgent();
1.15 www 73: use HTTP::Headers;
1.11 www 74: use vars
1.300 albertel 75: qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom
1.301 www 76: %libserv %pr %prp %metacache %packagetab %titlecache
1.349 www 77: %courselogs %accesshash %userrolehash $processmarker $dumpcount
1.352 www 78: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseresdatacache
1.420 albertel 79: %userresdatacache %usectioncache %domaindescription %domain_auth_def %domain_auth_arg_def
1.403 www 80: %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir);
81:
1.1 albertel 82: use IO::Socket;
1.31 www 83: use GDBM_File;
1.8 www 84: use Apache::Constants qw(:common :http);
1.208 albertel 85: use HTML::LCParser;
1.88 www 86: use Fcntl qw(:flock);
1.294 matthew 87: use Apache::loncoursedata;
1.414 www 88: use Apache::lonlocal;
1.428 albertel 89: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw);
1.425 albertel 90: use Time::HiRes();
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') {
1.311 matthew 145: #sleep 5;
146: #$answer=subreply($cmd,$server);
147: #if ($answer eq 'con_lost') {
1.233 albertel 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: }
1.1 albertel 205: my $answer=reply($cmd,$server);
206: if ($answer eq 'con_lost') {
207: my $pingreply=reply('ping',$server);
208: &reconlonc("$perlvar{'lonSockDir'}/$server");
209: my $pongreply=reply('pong',$server);
210: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
211: $answer=reply($cmd,$server);
212: if ($answer eq 'con_lost') {
213: my $now=time;
214: my $middlename=$cmd;
1.5 www 215: $middlename=substr($middlename,0,16);
1.1 albertel 216: $middlename=~s/\W//g;
217: my $dfilename=
1.305 www 218: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
219: $dumpcount++;
1.1 albertel 220: {
221: my $dfh;
222: if ($dfh=Apache::File->new(">$dfilename")) {
1.7 www 223: print $dfh "$cmd\n";
1.1 albertel 224: }
225: }
226: sleep 2;
227: my $wcmd='';
228: {
229: my $dfh;
230: if ($dfh=Apache::File->new("$dfilename")) {
231: $wcmd=<$dfh>;
232: }
233: }
234: chomp($wcmd);
1.7 www 235: if ($wcmd eq $cmd) {
1.12 www 236: &logthis("<font color=blue>WARNING: ".
237: "Connection buffer $dfilename: $cmd</font>");
1.1 albertel 238: &logperm("D:$server:$cmd");
239: return 'con_delayed';
240: } else {
1.12 www 241: &logthis("<font color=red>CRITICAL:"
242: ." Critical connection failed: $server $cmd</font>");
1.1 albertel 243: &logperm("F:$server:$cmd");
244: return 'con_failed';
245: }
246: }
247: }
248: return $answer;
1.405 albertel 249: }
250:
1.412 www 251: #
1.405 albertel 252: # -------------- Remove all key from the env that start witha lowercase letter
1.412 www 253: # (Which is always a lon-capa value)
254:
1.405 albertel 255: sub cleanenv {
1.412 www 256: # unless (defined(&Apache::exists_config_define("MODPERL2"))) { return; }
257: # unless (&Apache::exists_config_define("MODPERL2")) { return; }
1.405 albertel 258: foreach my $key (keys(%ENV)) {
259: if ($key =~ /^[a-z]/) {
260: delete($ENV{$key});
261: }
262: }
1.374 www 263: }
264:
265: # ------------------------------------------- Transfer profile into environment
266:
267: sub transfer_profile_to_env {
268: my ($lonidsdir,$handle)=@_;
269: my @profile;
270: {
271: my $idf=Apache::File->new("$lonidsdir/$handle.id");
272: flock($idf,LOCK_SH);
273: @profile=<$idf>;
274: $idf->close();
275: }
276: my $envi;
277: for ($envi=0;$envi<=$#profile;$envi++) {
278: chomp($profile[$envi]);
279: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
280: $ENV{$envname} = $envvalue;
281: }
282: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
1.1 albertel 283: }
284:
1.5 www 285: # ---------------------------------------------------------- Append Environment
286:
287: sub appenv {
1.6 www 288: my %newenv=@_;
1.191 harris41 289: foreach (keys %newenv) {
1.35 www 290: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
291: &logthis("<font color=blue>WARNING: ".
1.151 www 292: "Attempt to modify environment ".$_." to ".$newenv{$_}
293: .'</font>');
1.35 www 294: delete($newenv{$_});
295: } else {
296: $ENV{$_}=$newenv{$_};
297: }
1.191 harris41 298: }
1.95 www 299:
300: my $lockfh;
301: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
1.97 www 302: return 'error: '.$!;
1.95 www 303: }
304: unless (flock($lockfh,LOCK_EX)) {
305: &logthis("<font color=blue>WARNING: ".
306: 'Could not obtain exclusive lock in appenv: '.$!);
307: $lockfh->close();
308: return 'error: '.$!;
309: }
310:
1.6 www 311: my @oldenv;
312: {
313: my $fh;
314: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
1.97 www 315: return 'error: '.$!;
1.6 www 316: }
317: @oldenv=<$fh>;
1.89 www 318: $fh->close();
1.6 www 319: }
320: for (my $i=0; $i<=$#oldenv; $i++) {
321: chomp($oldenv[$i]);
1.9 www 322: if ($oldenv[$i] ne '') {
323: my ($name,$value)=split(/=/,$oldenv[$i]);
1.24 www 324: unless (defined($newenv{$name})) {
325: $newenv{$name}=$value;
326: }
1.9 www 327: }
1.6 www 328: }
329: {
330: my $fh;
331: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
332: return 'error';
333: }
334: my $newname;
1.93 www 335: foreach $newname (keys %newenv) {
1.6 www 336: print $fh "$newname=$newenv{$newname}\n";
337: }
1.86 albertel 338: $fh->close();
1.56 www 339: }
1.95 www 340:
341: $lockfh->close();
1.56 www 342: return 'ok';
343: }
344: # ----------------------------------------------------- Delete from Environment
345:
346: sub delenv {
347: my $delthis=shift;
348: my %newenv=();
349: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
350: &logthis("<font color=blue>WARNING: ".
351: "Attempt to delete from environment ".$delthis);
352: return 'error';
353: }
354: my @oldenv;
355: {
356: my $fh;
357: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
358: return 'error';
359: }
1.89 www 360: unless (flock($fh,LOCK_SH)) {
361: &logthis("<font color=blue>WARNING: ".
362: 'Could not obtain shared lock in delenv: '.$!);
363: $fh->close();
364: return 'error: '.$!;
365: }
1.56 www 366: @oldenv=<$fh>;
1.89 www 367: $fh->close();
1.56 www 368: }
369: {
370: my $fh;
371: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
372: return 'error';
373: }
1.89 www 374: unless (flock($fh,LOCK_EX)) {
375: &logthis("<font color=blue>WARNING: ".
376: 'Could not obtain exclusive lock in delenv: '.$!);
377: $fh->close();
378: return 'error: '.$!;
379: }
1.191 harris41 380: foreach (@oldenv) {
1.56 www 381: unless ($_=~/^$delthis/) { print $fh $_; }
1.191 harris41 382: }
1.87 www 383: $fh->close();
1.5 www 384: }
385: return 'ok';
1.369 albertel 386: }
387:
388: # ------------------------------------------ Find out current server userload
389: # there is a copy in lond
390: sub userload {
391: my $numusers=0;
392: {
393: opendir(LONIDS,$perlvar{'lonIDsDir'});
394: my $filename;
395: my $curtime=time;
396: while ($filename=readdir(LONIDS)) {
397: if ($filename eq '.' || $filename eq '..') {next;}
1.404 albertel 398: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
399: if ($curtime-$mtime < 3600) { $numusers++; }
1.369 albertel 400: }
401: closedir(LONIDS);
402: }
403: my $userloadpercent=0;
404: my $maxuserload=$perlvar{'lonUserLoadLim'};
405: if ($maxuserload) {
1.371 albertel 406: $userloadpercent=100*$numusers/$maxuserload;
1.369 albertel 407: }
1.372 albertel 408: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.369 albertel 409: return $userloadpercent;
1.283 www 410: }
411:
412: # ------------------------------------------ Fight off request when overloaded
413:
414: sub overloaderror {
415: my ($r,$checkserver)=@_;
416: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
417: my $loadavg;
418: if ($checkserver eq $perlvar{'lonHostID'}) {
419: my $loadfile=Apache::File->new('/proc/loadavg');
420: $loadavg=<$loadfile>;
421: $loadavg =~ s/\s.*//g;
1.285 matthew 422: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
1.283 www 423: } else {
424: $loadavg=&reply('load',$checkserver);
425: }
1.285 matthew 426: my $overload=$loadavg-100;
1.283 www 427: if ($overload>0) {
1.285 matthew 428: $r->err_headers_out->{'Retry-After'}=$overload;
1.283 www 429: $r->log_error('Overload of '.$overload.' on '.$checkserver);
430: return 413;
431: }
432: return '';
1.5 www 433: }
1.1 albertel 434:
435: # ------------------------------ Find server with least workload from spare.tab
1.11 www 436:
1.1 albertel 437: sub spareserver {
1.370 albertel 438: my ($loadpercent,$userloadpercent) = @_;
1.1 albertel 439: my $tryserver;
440: my $spareserver='';
1.370 albertel 441: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
442: my $lowestserver=$loadpercent > $userloadpercent?
443: $loadpercent : $userloadpercent;
1.1 albertel 444: foreach $tryserver (keys %spareid) {
1.411 albertel 445: my $loadans=reply('load',$tryserver);
446: my $userloadans=reply('userload',$tryserver);
447: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
448: next; #didn't get a number from the server
449: }
450: my $answer;
451: if ($loadans =~ /\d/) {
452: if ($userloadans =~ /\d/) {
453: #both are numbers, pick the bigger one
454: $answer=$loadans > $userloadans?
455: $loadans : $userloadans;
456: } else {
457: $answer = $loadans;
458: }
459: } else {
460: $answer = $userloadans;
461: }
462: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
463: $spareserver="http://$hostname{$tryserver}";
464: $lowestserver=$answer;
465: }
1.370 albertel 466: }
1.1 albertel 467: return $spareserver;
1.202 matthew 468: }
469:
470: # --------------------------------------------- Try to change a user's password
471:
472: sub changepass {
473: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
474: $currentpass = &escape($currentpass);
475: $newpass = &escape($newpass);
476: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
477: $server);
478: if (! $answer) {
479: &logthis("No reply on password change request to $server ".
480: "by $uname in domain $udom.");
481: } elsif ($answer =~ "^ok") {
482: &logthis("$uname in $udom successfully changed their password ".
483: "on $server.");
484: } elsif ($answer =~ "^pwchange_failure") {
485: &logthis("$uname in $udom was unable to change their password ".
486: "on $server. The action was blocked by either lcpasswd ".
487: "or pwchange");
488: } elsif ($answer =~ "^non_authorized") {
489: &logthis("$uname in $udom did not get their password correct when ".
490: "attempting to change it on $server.");
491: } elsif ($answer =~ "^auth_mode_error") {
492: &logthis("$uname in $udom attempted to change their password despite ".
493: "not being locally or internally authenticated on $server.");
494: } elsif ($answer =~ "^unknown_user") {
495: &logthis("$uname in $udom attempted to change their password ".
496: "on $server but were unable to because $server is not ".
497: "their home server.");
498: } elsif ($answer =~ "^refused") {
499: &logthis("$server refused to change $uname in $udom password because ".
500: "it was sent an unencrypted request to change the password.");
501: }
502: return $answer;
1.1 albertel 503: }
504:
1.169 harris41 505: # ----------------------- Try to determine user's current authentication scheme
506:
507: sub queryauthenticate {
508: my ($uname,$udom)=@_;
509: if (($perlvar{'lonRole'} eq 'library') &&
510: ($udom eq $perlvar{'lonDefDomain'})) {
511: my $answer=reply("encrypt:currentauth:$udom:$uname",
512: $perlvar{'lonHostID'});
513: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
514: if (length($answer)) {
515: return $answer;
516: }
517: else {
518: &logthis("User $uname at $udom lacks an authentication mechanism");
519: return 'no_host';
520: }
521: }
522: }
523:
524: my $tryserver;
525: foreach $tryserver (keys %libserv) {
526: if ($hostdom{$tryserver} eq $udom) {
527: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
528: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
529: if (length($answer)) {
530: return $answer;
531: }
532: else {
533: &logthis("User $uname at $udom lacks an authentication mechanism");
534: return 'no_host';
535: }
536: }
537: }
538: }
539: &logthis("User $uname at $udom lacks an authentication mechanism");
540: return 'no_host';
541: }
542:
1.1 albertel 543: # --------- Try to authenticate user from domain's lib servers (first this one)
1.11 www 544:
1.1 albertel 545: sub authenticate {
546: my ($uname,$upass,$udom)=@_;
1.12 www 547: $upass=escape($upass);
1.199 www 548: $uname=~s/\W//g;
1.1 albertel 549: if (($perlvar{'lonRole'} eq 'library') &&
550: ($udom eq $perlvar{'lonDefDomain'})) {
1.3 www 551: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
1.2 www 552: if ($answer =~ /authorized/) {
1.9 www 553: if ($answer eq 'authorized') {
554: &logthis("User $uname at $udom authorized by local server");
555: return $perlvar{'lonHostID'};
556: }
557: if ($answer eq 'non_authorized') {
558: &logthis("User $uname at $udom rejected by local server");
559: return 'no_host';
560: }
1.2 www 561: }
1.1 albertel 562: }
563:
564: my $tryserver;
565: foreach $tryserver (keys %libserv) {
566: if ($hostdom{$tryserver} eq $udom) {
1.10 www 567: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
1.1 albertel 568: if ($answer =~ /authorized/) {
1.9 www 569: if ($answer eq 'authorized') {
570: &logthis("User $uname at $udom authorized by $tryserver");
571: return $tryserver;
572: }
573: if ($answer eq 'non_authorized') {
574: &logthis("User $uname at $udom rejected by $tryserver");
575: return 'no_host';
576: }
1.1 albertel 577: }
578: }
1.9 www 579: }
580: &logthis("User $uname at $udom could not be authenticated");
1.1 albertel 581: return 'no_host';
582: }
583:
584: # ---------------------- Find the homebase for a user from domain's lib servers
1.11 www 585:
1.1 albertel 586: sub homeserver {
1.230 stredwic 587: my ($uname,$udom,$ignoreBadCache)=@_;
1.1 albertel 588: my $index="$uname:$udom";
1.426 albertel 589:
590: my ($result,$cached)=&is_cached(\%homecache,$index,'home',86400);
591: if (defined($cached)) { return $result; }
1.1 albertel 592: my $tryserver;
593: foreach $tryserver (keys %libserv) {
1.230 stredwic 594: next if ($ignoreBadCache ne 'true' &&
1.231 stredwic 595: exists($badServerCache{$tryserver}));
1.1 albertel 596: if ($hostdom{$tryserver} eq $udom) {
597: my $answer=reply("home:$udom:$uname",$tryserver);
598: if ($answer eq 'found') {
1.426 albertel 599: return &do_cache(\%homecache,$index,$tryserver,'home');
1.231 stredwic 600: } elsif ($answer eq 'no_host') {
601: $badServerCache{$tryserver}=1;
1.221 matthew 602: }
1.1 albertel 603: }
604: }
605: return 'no_host';
1.70 www 606: }
607:
608: # ------------------------------------- Find the usernames behind a list of IDs
609:
610: sub idget {
611: my ($udom,@ids)=@_;
612: my %returnhash=();
613:
614: my $tryserver;
615: foreach $tryserver (keys %libserv) {
616: if ($hostdom{$tryserver} eq $udom) {
617: my $idlist=join('&',@ids);
618: $idlist=~tr/A-Z/a-z/;
619: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
620: my @answer=();
1.76 www 621: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
1.70 www 622: @answer=split(/\&/,$reply);
623: } ;
624: my $i;
625: for ($i=0;$i<=$#ids;$i++) {
626: if ($answer[$i]) {
627: $returnhash{$ids[$i]}=$answer[$i];
628: }
629: }
630: }
631: }
632: return %returnhash;
633: }
634:
635: # ------------------------------------- Find the IDs behind a list of usernames
636:
637: sub idrget {
638: my ($udom,@unames)=@_;
639: my %returnhash=();
1.191 harris41 640: foreach (@unames) {
1.70 www 641: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
1.191 harris41 642: }
1.70 www 643: return %returnhash;
644: }
645:
646: # ------------------------------- Store away a list of names and associated IDs
647:
648: sub idput {
649: my ($udom,%ids)=@_;
650: my %servers=();
1.191 harris41 651: foreach (keys %ids) {
1.70 www 652: my $uhom=&homeserver($_,$udom);
653: if ($uhom ne 'no_host') {
654: my $id=&escape($ids{$_});
655: $id=~tr/A-Z/a-z/;
656: my $unam=&escape($_);
657: if ($servers{$uhom}) {
658: $servers{$uhom}.='&'.$id.'='.$unam;
659: } else {
660: $servers{$uhom}=$id.'='.$unam;
661: }
662: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
663: }
1.191 harris41 664: }
665: foreach (keys %servers) {
1.70 www 666: &critical('idput:'.$udom.':'.$servers{$_},$_);
1.191 harris41 667: }
1.344 www 668: }
669:
670: # --------------------------------------------------- Assign a key to a student
671:
672: sub assign_access_key {
1.364 www 673: #
674: # a valid key looks like uname:udom#comments
675: # comments are being appended
676: #
677: my ($ckey,$cdom,$cnum,$udom,$uname,$logentry)=@_;
1.344 www 678: $cdom=
679: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
680: $cnum=
681: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
682: $udom=$ENV{'user.name'} unless (defined($udom));
683: $uname=$ENV{'user.domain'} unless (defined($uname));
1.345 www 684: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
1.364 www 685: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
686: ($existing{$ckey}=~/^$uname\:$udom\#(.*)$/)) {
687: # assigned to this person
688: # - this should not happen,
1.345 www 689: # unless something went wrong
690: # the first time around
691: # ready to assign
1.364 www 692: $logentry=$1.'; '.$logentry;
693: if (&put('accesskey',{$ckey=>$uname.':'.$udom.'#'.$logentry},
694: $cdom,$cnum) eq 'ok') {
1.345 www 695: # key now belongs to user
1.346 www 696: my $envkey='key.'.$cdom.'_'.$cnum;
1.345 www 697: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
698: &appenv('environment.'.$envkey => $ckey);
699: return 'ok';
700: } else {
701: return
702: 'error: Count not permanently assign key, will need to be re-entered later.';
703: }
704: } else {
705: return 'error: Could not assign key, try again later.';
706: }
1.364 www 707: } elsif (!$existing{$ckey}) {
1.345 www 708: # the key does not exist
709: return 'error: The key does not exist';
710: } else {
711: # the key is somebody else's
712: return 'error: The key is already in use';
713: }
1.344 www 714: }
715:
1.364 www 716: # ------------------------------------------ put an additional comment on a key
717:
718: sub comment_access_key {
719: #
720: # a valid key looks like uname:udom#comments
721: # comments are being appended
722: #
723: my ($ckey,$cdom,$cnum,$logentry)=@_;
724: $cdom=
725: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
726: $cnum=
727: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
728: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
729: if ($existing{$ckey}) {
730: $existing{$ckey}.='; '.$logentry;
731: # ready to assign
1.367 www 732: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
1.364 www 733: $cdom,$cnum) eq 'ok') {
734: return 'ok';
735: } else {
736: return 'error: Count not store comment.';
737: }
738: } else {
739: # the key does not exist
740: return 'error: The key does not exist';
741: }
742: }
743:
1.344 www 744: # ------------------------------------------------------ Generate a set of keys
745:
746: sub generate_access_keys {
1.364 www 747: my ($number,$cdom,$cnum,$logentry)=@_;
1.344 www 748: $cdom=
749: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
750: $cnum=
751: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
1.361 www 752: unless (&allowed('mky',$cdom)) { return 0; }
1.344 www 753: unless (($cdom) && ($cnum)) { return 0; }
754: if ($number>10000) { return 0; }
755: sleep(2); # make sure don't get same seed twice
756: srand(time()^($$+($$<<15))); # from "Programming Perl"
757: my $total=0;
758: for (my $i=1;$i<=$number;$i++) {
759: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
760: sprintf("%lx",int(100000*rand)).'-'.
761: sprintf("%lx",int(100000*rand));
762: $newkey=~s/1/g/g; # folks mix up 1 and l
763: $newkey=~s/0/h/g; # and also 0 and O
764: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
765: if ($existing{$newkey}) {
766: $i--;
767: } else {
1.364 www 768: if (&put('accesskeys',
769: { $newkey => '# generated '.localtime().
770: ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
771: '; '.$logentry },
772: $cdom,$cnum) eq 'ok') {
1.344 www 773: $total++;
774: }
775: }
776: }
777: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
778: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
779: return $total;
780: }
781:
782: # ------------------------------------------------------- Validate an accesskey
783:
784: sub validate_access_key {
785: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
786: $cdom=
787: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
788: $cnum=
789: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
790: $udom=$ENV{'user.name'} unless (defined($udom));
791: $uname=$ENV{'user.domain'} unless (defined($uname));
1.345 www 792: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
1.364 www 793: return ($existing{$ckey}=~/^$uname\:$udom\#/);
1.70 www 794: }
795:
796: # ------------------------------------- Find the section of student in a course
1.298 matthew 797:
798: sub getsection {
799: my ($udom,$unam,$courseid)=@_;
800: $courseid=~s/\_/\//g;
801: $courseid=~s/^(\w)/\/$1/;
802: my %Pending;
803: my %Expired;
804: #
805: # Each role can either have not started yet (pending), be active,
806: # or have expired.
807: #
808: # If there is an active role, we are done.
809: #
810: # If there is more than one role which has not started yet,
811: # choose the one which will start sooner
812: # If there is one role which has not started yet, return it.
813: #
814: # If there is more than one expired role, choose the one which ended last.
815: # If there is a role which has expired, return it.
816: #
817: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
818: &homeserver($unam,$udom)))) {
819: my ($key,$value)=split(/\=/,$_);
820: $key=&unescape($key);
821: next if ($key !~/^$courseid(?:\/)*(\w+)*\_st$/);
822: my $section=$1;
823: if ($key eq $courseid.'_st') { $section=''; }
824: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
825: my $now=time;
826: if (defined($end) && ($now > $end)) {
827: $Expired{$end}=$section;
828: next;
829: }
830: if (defined($start) && ($now < $start)) {
831: $Pending{$start}=$section;
832: next;
833: }
834: return $section;
835: }
836: #
837: # Presumedly there will be few matching roles from the above
838: # loop and the sorting time will be negligible.
839: if (scalar(keys(%Pending))) {
840: my ($time) = sort {$a <=> $b} keys(%Pending);
841: return $Pending{$time};
842: }
843: if (scalar(keys(%Expired))) {
844: my @sorted = sort {$a <=> $b} keys(%Expired);
845: my $time = pop(@sorted);
846: return $Expired{$time};
847: }
848: return '-1';
849: }
1.70 www 850:
1.416 albertel 851: sub devalidate_cache {
1.428 albertel 852: my ($cache,$id,$name) = @_;
1.417 albertel 853: delete $$cache{$id.'.time'};
854: delete $$cache{$id};
1.428 albertel 855: my $filename=$perlvar{'lonDaemons'}.'/tmp/'.$name.".db";
856: open(DB,"$filename.lock");
857: flock(DB,LOCK_EX);
858: my %hash;
859: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
860: delete($hash{$id});
861: delete($hash{$id.'.time'});
862: } else {
863: &logthis("Unable to tie hash");
864: }
865: untie(%hash);
866: flock(DB,LOCK_UN);
867: close(DB);
1.416 albertel 868: }
869:
870: sub is_cached {
1.425 albertel 871: my ($cache,$id,$name,$time) = @_;
1.420 albertel 872: if (!$time) { $time=300; }
1.416 albertel 873: if (!exists($$cache{$id.'.time'})) {
1.428 albertel 874: &load_cache_item($cache,$name,$id);
1.425 albertel 875: }
876: if (!exists($$cache{$id.'.time'})) {
877: # &logthis("Didn't find $id");
1.417 albertel 878: return (undef,undef);
1.416 albertel 879: } else {
1.425 albertel 880: if (time-($$cache{$id.'.time'})>$time) {
1.428 albertel 881: # &logthis("Devailidating $id - ".time-($$cache{$id.'.time'}));
882: &devalidate_cache($cache,$id,$name);
1.417 albertel 883: return (undef,undef);
1.416 albertel 884: }
885: }
1.417 albertel 886: return ($$cache{$id},1);
1.416 albertel 887: }
888:
889: sub do_cache {
1.425 albertel 890: my ($cache,$id,$value,$name) = @_;
1.416 albertel 891: $$cache{$id.'.time'}=time;
1.425 albertel 892: $$cache{$id}=$value;
1.428 albertel 893: # &logthis("Caching $id as :$value:");
894: &save_cache_item($cache,$name,$id);
1.416 albertel 895: # do_cache implictly return the set value
1.425 albertel 896: $$cache{$id};
897: }
898:
899: sub save_cache {
900: my ($cache,$name)=@_;
1.428 albertel 901: my $starttime=&Time::HiRes::time();
1.425 albertel 902: # &logthis("Saving :$name:");
903: eval lock_store($cache,$perlvar{'lonDaemons'}.'/tmp/'.$name.".storable");
904: if ($@) { &logthis("lock_store threw a die ".$@); }
905: # &logthis("save_cache took ".(&Time::HiRes::time()-$starttime));
906: }
907:
908: sub load_cache {
909: my ($cache,$name)=@_;
1.428 albertel 910: my $starttime=&Time::HiRes::time();
1.425 albertel 911: # &logthis("Before Loading $name size is ".scalar(%$cache));
912: my $tmpcache;
913: eval {
914: $tmpcache=lock_retrieve($perlvar{'lonDaemons'}.'/tmp/'.$name.".storable");
915: };
916: if ($@) { &logthis("lock_retreive threw a die ".$@); return; }
917: if (!%$cache) {
918: my $count;
919: while (my ($key,$value)=each(%$tmpcache)) {
920: $count++;
921: $$cache{$key}=$value;
922: }
923: # &logthis("Initial load: $count");
924: } else {
925: my $key;
926: my $count;
927: while ($key=each(%$tmpcache)) {
928: if ($key !~/^(.*)\.time$/) { next; }
929: my $name=$1;
930: if (exists($$cache{$key})) {
931: if ($$tmpcache{$key} >= $$cache{$key}) {
932: $$cache{$key}=$$tmpcache{$key};
933: $$cache{$name}=$$tmpcache{$name};
934: } else {
935: # &logthis("Would have overwritten $name with is set to expire at ".$$cache{$key}." with ".$$tmpcache{$key}." Whew!");
936: }
937: } else {
938: $count++;
939: $$cache{$key}=$$tmpcache{$key};
940: $$cache{$name}=$$tmpcache{$name};
941: }
942: }
943: # &logthis("Additional load: $count");
944: }
945: # &logthis("After Loading $name size is ".scalar(%$cache));
946: # &logthis("load_cache took ".(&Time::HiRes::time()-$starttime));
1.416 albertel 947: }
948:
1.428 albertel 949: sub save_cache_item {
950: my ($cache,$name,$id)=@_;
951: my $starttime=&Time::HiRes::time();
952: # &logthis("Saving :$name:$id");
953: my %hash;
954: my $filename=$perlvar{'lonDaemons'}.'/tmp/'.$name.".db";
955: open(DB,"$filename.lock");
956: flock(DB,LOCK_EX);
957: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
958: $hash{$id.'.time'}=$$cache{$id.'.time'};
959: $hash{$id}=freeze({'item'=>$$cache{$id}});
960: } else {
961: &logthis("Unable to tie hash");
962: }
963: untie(%hash);
964: flock(DB,LOCK_UN);
965: close(DB);
966: # &logthis("save_cache_item $name took ".(&Time::HiRes::time()-$starttime));
967: }
968:
969: sub load_cache_item {
970: my ($cache,$name,$id)=@_;
971: my $starttime=&Time::HiRes::time();
972: # &logthis("Before Loading $name for $id size is ".scalar(%$cache));
973: my %hash;
974: my $filename=$perlvar{'lonDaemons'}.'/tmp/'.$name.".db";
975: open(DB,"$filename.lock");
976: flock(DB,LOCK_SH);
977: if (tie(%hash,'GDBM_File',$filename,&GDBM_READER(),0640)) {
978: if (!%$cache) {
979: my $count;
980: while (my ($key,$value)=each(%hash)) {
981: $count++;
982: if ($key =~ /\.time$/) {
983: $$cache{$key}=$value;
984: } else {
985: my $hashref=thaw($value);
986: $$cache{$key}=$hashref->{'item'};
987: }
988: }
989: # &logthis("Initial load: $count");
990: } else {
991: my $hashref=thaw($hash{$id});
992: $$cache{$id}=$hashref->{'item'};
993: $$cache{$id.'.time'}=$hash{$id.'.time'};
994: }
995: } else {
996: &logthis("Unable to tie hash");
997: }
998: untie(%hash);
999: flock(DB,LOCK_UN);
1000: close(DB);
1001: # &logthis("After Loading $name size is ".scalar(%$cache));
1002: # &logthis("load_cache_item $name took ".(&Time::HiRes::time()-$starttime));
1003: }
1004:
1.70 www 1005: sub usection {
1006: my ($udom,$unam,$courseid)=@_;
1.416 albertel 1007: my $hashid="$udom:$unam:$courseid";
1008:
1.425 albertel 1009: my ($result,$cached)=&is_cached(\%usectioncache,$hashid,'usection');
1.417 albertel 1010: if (defined($cached)) { return $result; }
1.70 www 1011: $courseid=~s/\_/\//g;
1012: $courseid=~s/^(\w)/\/$1/;
1.191 harris41 1013: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
1014: &homeserver($unam,$udom)))) {
1.70 www 1015: my ($key,$value)=split(/\=/,$_);
1016: $key=&unescape($key);
1017: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
1018: my $section=$1;
1019: if ($key eq $courseid.'_st') { $section=''; }
1020: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
1021: my $now=time;
1022: my $notactive=0;
1023: if ($start) {
1024: if ($now<$start) { $notactive=1; }
1025: }
1026: if ($end) {
1027: if ($now>$end) { $notactive=1; }
1028: }
1.416 albertel 1029: unless ($notactive) {
1.425 albertel 1030: return &do_cache(\%usectioncache,$hashid,$section,'usection');
1.416 albertel 1031: }
1.70 www 1032: }
1.191 harris41 1033: }
1.425 albertel 1034: return &do_cache(\%usectioncache,$hashid,'-1','usection');
1.70 www 1035: }
1036:
1037: # ------------------------------------- Read an entry from a user's environment
1038:
1039: sub userenvironment {
1040: my ($udom,$unam,@what)=@_;
1041: my %returnhash=();
1042: my @answer=split(/\&/,
1043: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1044: &homeserver($unam,$udom)));
1045: my $i;
1046: for ($i=0;$i<=$#what;$i++) {
1047: $returnhash{$what[$i]}=&unescape($answer[$i]);
1048: }
1049: return %returnhash;
1.1 albertel 1050: }
1051:
1.263 www 1052: # -------------------------------------------------------------------- New chat
1053:
1054: sub chatsend {
1055: my ($newentry,$anon)=@_;
1056: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1057: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1058: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1059: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1060: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
1061: &escape($newentry)),$chome);
1.292 www 1062: }
1063:
1064: # ------------------------------------------ Find current version of a resource
1065:
1066: sub getversion {
1067: my $fname=&clutter(shift);
1068: unless ($fname=~/^\/res\//) { return -1; }
1069: return ¤tversion(&filelocation('',$fname));
1070: }
1071:
1072: sub currentversion {
1073: my $fname=shift;
1074: my $author=$fname;
1075: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1076: my ($udom,$uname)=split(/\//,$author);
1077: my $home=homeserver($uname,$udom);
1078: if ($home eq 'no_host') {
1079: return -1;
1080: }
1081: my $answer=reply("currentversion:$fname",$home);
1082: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1083: return -1;
1084: }
1085: return $answer;
1.263 www 1086: }
1087:
1.1 albertel 1088: # ----------------------------- Subscribe to a resource, return URL if possible
1.11 www 1089:
1.1 albertel 1090: sub subscribe {
1091: my $fname=shift;
1.312 www 1092: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1.1 albertel 1093: my $author=$fname;
1094: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1095: my ($udom,$uname)=split(/\//,$author);
1096: my $home=homeserver($uname,$udom);
1.335 albertel 1097: if ($home eq 'no_host') {
1098: return 'not_found';
1.1 albertel 1099: }
1100: my $answer=reply("sub:$fname",$home);
1.64 www 1101: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1102: $answer.=' by '.$home;
1103: }
1.1 albertel 1104: return $answer;
1105: }
1106:
1.8 www 1107: # -------------------------------------------------------------- Replicate file
1108:
1109: sub repcopy {
1110: my $filename=shift;
1.23 www 1111: $filename=~s/\/+/\//g;
1.214 www 1112: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
1.8 www 1113: my $transname="$filename.in.transfer";
1.17 www 1114: if ((-e $filename) || (-e $transname)) { return OK; }
1.8 www 1115: my $remoteurl=subscribe($filename);
1.64 www 1116: if ($remoteurl =~ /^con_lost by/) {
1117: &logthis("Subscribe returned $remoteurl: $filename");
1.8 www 1118: return HTTP_SERVICE_UNAVAILABLE;
1119: } elsif ($remoteurl eq 'not_found') {
1120: &logthis("Subscribe returned not_found: $filename");
1121: return HTTP_NOT_FOUND;
1.64 www 1122: } elsif ($remoteurl =~ /^rejected by/) {
1123: &logthis("Subscribe returned $remoteurl: $filename");
1.8 www 1124: return FORBIDDEN;
1.20 www 1125: } elsif ($remoteurl eq 'directory') {
1126: return OK;
1.8 www 1127: } else {
1.290 www 1128: my $author=$filename;
1129: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1130: my ($udom,$uname)=split(/\//,$author);
1131: my $home=homeserver($uname,$udom);
1132: unless ($home eq $perlvar{'lonHostID'}) {
1.8 www 1133: my @parts=split(/\//,$filename);
1134: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1135: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1136: &logthis("Malconfiguration for replication: $filename");
1137: return HTTP_BAD_REQUEST;
1138: }
1139: my $count;
1140: for ($count=5;$count<$#parts;$count++) {
1141: $path.="/$parts[$count]";
1142: if ((-e $path)!=1) {
1143: mkdir($path,0777);
1144: }
1145: }
1146: my $ua=new LWP::UserAgent;
1147: my $request=new HTTP::Request('GET',"$remoteurl");
1148: my $response=$ua->request($request,$transname);
1149: if ($response->is_error()) {
1150: unlink($transname);
1151: my $message=$response->status_line;
1.12 www 1152: &logthis("<font color=blue>WARNING:"
1153: ." LWP get: $message: $filename</font>");
1.8 www 1154: return HTTP_SERVICE_UNAVAILABLE;
1155: } else {
1.16 www 1156: if ($remoteurl!~/\.meta$/) {
1157: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1158: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1159: if ($mresponse->is_error()) {
1160: unlink($filename.'.meta');
1161: &logthis(
1162: "<font color=yellow>INFO: No metadata: $filename</font>");
1163: }
1164: }
1.8 www 1165: rename($transname,$filename);
1166: return OK;
1167: }
1.290 www 1168: }
1.8 www 1169: }
1.330 www 1170: }
1171:
1172: # ------------------------------------------------ Get server side include body
1173: sub ssi_body {
1.381 albertel 1174: my ($filelink,%form)=@_;
1.330 www 1175: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1.381 albertel 1176: &ssi($filelink,%form));
1.330 www 1177: $output=~s/^.*\<body[^\>]*\>//si;
1178: $output=~s/\<\/body\s*\>.*$//si;
1.331 www 1179: $output=~
1180: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
1.330 www 1181: return $output;
1.8 www 1182: }
1183:
1.15 www 1184: # --------------------------------------------------------- Server Side Include
1185:
1186: sub ssi {
1187:
1.23 www 1188: my ($fn,%form)=@_;
1.15 www 1189:
1190: my $ua=new LWP::UserAgent;
1.23 www 1191:
1192: my $request;
1193:
1194: if (%form) {
1195: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1.201 albertel 1196: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1.23 www 1197: } else {
1198: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1199: }
1200:
1.15 www 1201: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1202: my $response=$ua->request($request);
1203:
1.324 www 1204: return $response->content;
1205: }
1206:
1207: sub externalssi {
1208: my ($url)=@_;
1209: my $ua=new LWP::UserAgent;
1210: my $request=new HTTP::Request('GET',$url);
1211: my $response=$ua->request($request);
1.15 www 1212: return $response->content;
1213: }
1.254 www 1214:
1215: # ------- Add a token to a remote URI's query string to vouch for access rights
1216:
1217: sub tokenwrapper {
1218: my $uri=shift;
1.259 www 1219: $uri=~s/^http\:\/\/([^\/]+)//;
1220: $uri=~s/^\///;
1221: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
1222: my $token=$1;
1223: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
1224: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
1225: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
1.304 www 1226: (($uri=~/\?/)?'&':'?').'token='.$token.
1227: '&tokenissued='.$perlvar{'lonHostID'};
1.259 www 1228: } else {
1229: return '/adm/notfound.html';
1230: }
1.254 www 1231: }
1232:
1.257 www 1233: # --------------- Take an uploaded file and put it into the userfiles directory
1.259 www 1234: # input: name of form element, coursedoc=1 means this is for the course
1.257 www 1235: # output: url of file in userspace
1236:
1237: sub userfileupload {
1.259 www 1238: my ($formname,$coursedoc)=@_;
1.257 www 1239: my $fname=$ENV{'form.'.$formname.'.filename'};
1.315 www 1240: # Replace Windows backslashes by forward slashes
1.257 www 1241: $fname=~s/\\/\//g;
1.315 www 1242: # Get rid of everything but the actual filename
1.257 www 1243: $fname=~s/^.*\/([^\/]+)$/$1/;
1.315 www 1244: # Replace spaces by underscores
1245: $fname=~s/\s+/\_/g;
1246: # Replace all other weird characters by nothing
1.317 www 1247: $fname=~s/[^\w\.\-]//g;
1.315 www 1248: # See if there is anything left
1.257 www 1249: unless ($fname) { return 'error: no uploaded file'; }
1250: chop($ENV{'form.'.$formname});
1.258 www 1251: # Create the directory if not present
1.259 www 1252: my $docuname='';
1253: my $docudom='';
1254: my $docuhome='';
1255: if ($coursedoc) {
1256: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1257: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1258: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1259: } else {
1260: $docuname=$ENV{'user.name'};
1261: $docudom=$ENV{'user.domain'};
1262: $docuhome=$ENV{'user.home'};
1263: }
1.271 www 1264: return
1265: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1266: }
1267:
1268: sub finishuserfileupload {
1269: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1.259 www 1270: my $path=$docudom.'/'.$docuname.'/';
1.258 www 1271: my $filepath=$perlvar{'lonDocRoot'};
1.259 www 1272: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1.258 www 1273: my $count;
1274: for ($count=4;$count<=$#parts;$count++) {
1275: $filepath.="/$parts[$count]";
1276: if ((-e $filepath)!=1) {
1277: mkdir($filepath,0777);
1278: }
1279: }
1280: # Save the file
1281: {
1282: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
1283: print $fh $ENV{'form.'.$formname};
1284: }
1.259 www 1285: # Notify homeserver to grep it
1286: #
1.295 www 1287:
1288: my $fetchresult=
1289: &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
1290: if ($fetchresult eq 'ok') {
1.259 www 1291: #
1.258 www 1292: # Return the URL to it
1.263 www 1293: return '/uploaded/'.$path.$fname;
1294: } else {
1.295 www 1295: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
1296: ' to host '.$docuhome.': '.$fetchresult);
1.263 www 1297: return '/adm/notfound.html';
1298: }
1.257 www 1299: }
1.15 www 1300:
1.14 www 1301: # ------------------------------------------------------------------------- Log
1302:
1303: sub log {
1304: my ($dom,$nam,$hom,$what)=@_;
1.47 www 1305: return critical("log:$dom:$nam:$what",$hom);
1.157 www 1306: }
1307:
1308: # ------------------------------------------------------------------ Course Log
1.352 www 1309: #
1310: # This routine flushes several buffers of non-mission-critical nature
1311: #
1.157 www 1312:
1313: sub flushcourselogs {
1.352 www 1314: &logthis('Flushing log buffers');
1315: #
1316: # course logs
1317: # This is a log of all transactions in a course, which can be used
1318: # for data mining purposes
1319: #
1320: # It also collects the courseid database, which lists last transaction
1321: # times and course titles for all courseids
1322: #
1323: my %courseidbuffer=();
1.191 harris41 1324: foreach (keys %courselogs) {
1.157 www 1325: my $crsid=$_;
1.352 www 1326: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1.188 www 1327: &escape($courselogs{$crsid}),
1328: $coursehombuf{$crsid}) eq 'ok') {
1.157 www 1329: delete $courselogs{$crsid};
1330: } else {
1331: &logthis('Failed to flush log buffer for '.$crsid);
1332: if (length($courselogs{$crsid})>40000) {
1333: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1334: " exceeded maximum size, deleting.</font>");
1335: delete $courselogs{$crsid};
1336: }
1.352 www 1337: }
1338: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1339: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1340: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1341: } else {
1342: $courseidbuffer{$coursehombuf{$crsid}}=
1343: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1344: }
1.191 harris41 1345: }
1.352 www 1346: #
1347: # Write course id database (reverse lookup) to homeserver of courses
1348: # Is used in pickcourse
1349: #
1350: foreach (keys %courseidbuffer) {
1.353 www 1351: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1.352 www 1352: }
1353: #
1354: # File accesses
1355: # Writes to the dynamic metadata of resources to get hit counts, etc.
1356: #
1.191 harris41 1357: foreach (keys %accesshash) {
1.185 www 1358: my $entry=$_;
1359: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
1360: my %temphash=($entry => $accesshash{$entry});
1.266 albertel 1361: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
1.185 www 1362: delete $accesshash{$entry};
1363: }
1.191 harris41 1364: }
1.352 www 1365: #
1366: # Roles
1367: # Reverse lookup of user roles for course faculty/staff and co-authorship
1368: #
1.349 www 1369: foreach (keys %userrolehash) {
1370: my $entry=$_;
1.351 www 1371: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1.349 www 1372: split(/\:/,$entry);
1373: if (&Apache::lonnet::put('nohist_userroles',
1.351 www 1374: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1.349 www 1375: $rudom,$runame) eq 'ok') {
1376: delete $userrolehash{$entry};
1377: }
1378: }
1.186 www 1379: $dumpcount++;
1.157 www 1380: }
1381:
1382: sub courselog {
1383: my $what=shift;
1.158 www 1384: $what=time.':'.$what;
1.157 www 1385: unless ($ENV{'request.course.id'}) { return ''; }
1.188 www 1386: $coursedombuf{$ENV{'request.course.id'}}=
1.352 www 1387: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1388: $coursenumbuf{$ENV{'request.course.id'}}=
1.188 www 1389: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1390: $coursehombuf{$ENV{'request.course.id'}}=
1391: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1.352 www 1392: $coursedescrbuf{$ENV{'request.course.id'}}=
1393: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1.157 www 1394: if (defined $courselogs{$ENV{'request.course.id'}}) {
1395: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1396: } else {
1397: $courselogs{$ENV{'request.course.id'}}.=$what;
1398: }
1399: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1400: &flushcourselogs();
1401: }
1.158 www 1402: }
1403:
1404: sub courseacclog {
1405: my $fnsymb=shift;
1406: unless ($ENV{'request.course.id'}) { return ''; }
1407: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1.408 www 1408: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1.187 www 1409: $what.=':POST';
1.191 harris41 1410: foreach (keys %ENV) {
1.158 www 1411: if ($_=~/^form\.(.*)/) {
1412: $what.=':'.$1.'='.$ENV{$_};
1413: }
1.191 harris41 1414: }
1.158 www 1415: }
1416: &courselog($what);
1.149 www 1417: }
1418:
1.185 www 1419: sub countacc {
1420: my $url=&declutter(shift);
1421: unless ($ENV{'request.course.id'}) { return ''; }
1422: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1.281 www 1423: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1.185 www 1424: if (defined($accesshash{$key})) {
1425: $accesshash{$key}++;
1426: } else {
1427: $accesshash{$key}=1;
1428: }
1429: }
1.349 www 1430:
1.361 www 1431: sub linklog {
1432: my ($from,$to)=@_;
1433: $from=&declutter($from);
1434: $to=&declutter($to);
1435: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1436: $accesshash{$to.'___'.$from.'___goto'}=1;
1437: }
1438:
1.349 www 1439: sub userrolelog {
1440: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1441: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1442: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1443: ($trole=~/^cr/)) {
1.350 www 1444: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1445: $userrolehash
1446: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1.349 www 1447: =$tend.':'.$tstart;
1448: }
1.351 www 1449: }
1450:
1451: sub get_course_adv_roles {
1452: my $cid=shift;
1453: $cid=$ENV{'request.course.id'} unless (defined($cid));
1454: my %coursehash=&coursedescription($cid);
1455: my %returnhash=();
1456: my %dumphash=
1457: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1458: my $now=time;
1459: foreach (keys %dumphash) {
1460: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1461: if (($tstart) && ($tstart<0)) { next; }
1462: if (($tend) && ($tend<$now)) { next; }
1463: if (($tstart) && ($now<$tstart)) { next; }
1464: my ($role,$username,$domain,$section)=split(/\:/,$_);
1465: my $key=&plaintext($role);
1466: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1467: if ($returnhash{$key}) {
1468: $returnhash{$key}.=','.$username.':'.$domain;
1469: } else {
1470: $returnhash{$key}=$username.':'.$domain;
1471: }
1.400 www 1472: }
1473: return %returnhash;
1474: }
1475:
1476: sub get_my_roles {
1477: my ($uname,$udom)=@_;
1478: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1479: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1480: my %dumphash=
1481: &dump('nohist_userroles',$udom,$uname);
1482: my %returnhash=();
1483: my $now=time;
1484: foreach (keys %dumphash) {
1485: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1486: if (($tstart) && ($tstart<0)) { next; }
1487: if (($tend) && ($tend<$now)) { next; }
1488: if (($tstart) && ($now<$tstart)) { next; }
1489: my ($role,$username,$domain,$section)=split(/\:/,$_);
1490: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1.373 www 1491: }
1492: return %returnhash;
1.399 www 1493: }
1494:
1495: # ----------------------------------------------------- Frontpage Announcements
1496: #
1497: #
1498:
1499: sub postannounce {
1500: my ($server,$text)=@_;
1501: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1502: unless ($text=~/\w/) { $text=''; }
1503: return &reply('setannounce:'.&escape($text),$server);
1504: }
1505:
1506: sub getannounce {
1507: if (my $fh=Apache::File->new($perlvar{'lonDocRoot'}.'/announcement.txt')) {
1508: my $announcement='';
1509: while (<$fh>) { $announcement .=$_; }
1510: $fh->close();
1511: if ($announcement=~/\w/) {
1512: return
1513: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1514: '<tr><td bgcolor="#FFFFFF"><pre>'.$announcement.'</pre></td></tr></table>';
1515: } else {
1516: return '';
1517: }
1518: } else {
1519: return '';
1520: }
1.351 www 1521: }
1.353 www 1522:
1523: # ---------------------------------------------------------- Course ID routines
1524: # Deal with domain's nohist_courseid.db files
1525: #
1526:
1527: sub courseidput {
1528: my ($domain,$what,$coursehome)=@_;
1529: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1530: }
1531:
1532: sub courseiddump {
1533: my ($domfilter,$descfilter,$sincefilter)=@_;
1534: my %returnhash=();
1.355 www 1535: unless ($domfilter) { $domfilter=''; }
1.353 www 1536: foreach my $tryserver (keys %libserv) {
1.355 www 1537: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1.353 www 1538: foreach (
1539: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1.354 www 1540: $sincefilter.':'.&escape($descfilter),
1541: $tryserver))) {
1.353 www 1542: my ($key,$value)=split(/\=/,$_);
1543: if (($key) && ($value)) {
1544: $returnhash{&unescape($key)}=&unescape($value);
1545: }
1546: }
1547:
1548: }
1549: }
1550: return %returnhash;
1551: }
1552:
1553: #
1.149 www 1554: # ----------------------------------------------------------- Check out an item
1555:
1556: sub checkout {
1557: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1558: my $now=time;
1559: my $lonhost=$perlvar{'lonHostID'};
1560: my $infostr=&escape(
1.234 www 1561: 'CHECKOUTTOKEN&'.
1.149 www 1562: $tuname.'&'.
1563: $tudom.'&'.
1564: $tcrsid.'&'.
1565: $symb.'&'.
1566: $now.'&'.$ENV{'REMOTE_ADDR'});
1567: my $token=&reply('tmpput:'.$infostr,$lonhost);
1.151 www 1568: if ($token=~/^error\:/) {
1569: &logthis("<font color=blue>WARNING: ".
1570: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1571: "</font>");
1572: return '';
1573: }
1574:
1.149 www 1575: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1576: $token=~tr/a-z/A-Z/;
1577:
1.153 www 1578: my %infohash=('resource.0.outtoken' => $token,
1579: 'resource.0.checkouttime' => $now,
1580: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1.149 www 1581:
1582: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1583: return '';
1.151 www 1584: } else {
1585: &logthis("<font color=blue>WARNING: ".
1586: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1587: "</font>");
1.149 www 1588: }
1589:
1590: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1591: &escape('Checkout '.$infostr.' - '.
1592: $token)) ne 'ok') {
1593: return '';
1.151 www 1594: } else {
1595: &logthis("<font color=blue>WARNING: ".
1596: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1597: "</font>");
1.149 www 1598: }
1.151 www 1599: return $token;
1.149 www 1600: }
1601:
1602: # ------------------------------------------------------------ Check in an item
1603:
1604: sub checkin {
1605: my $token=shift;
1.150 www 1606: my $now=time;
1607: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1608: $lonhost=~tr/A-Z/a-z/;
1609: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1610: $dtoken=~s/\W/\_/g;
1.234 www 1611: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1.150 www 1612: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1613:
1.154 www 1614: unless (($tuname) && ($tudom)) {
1615: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1616: return '';
1617: }
1618:
1619: unless (&allowed('mgr',$tcrsid)) {
1620: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1621: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1622: return '';
1623: }
1624:
1.153 www 1625: my %infohash=('resource.0.intoken' => $token,
1626: 'resource.0.checkintime' => $now,
1627: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1.150 www 1628:
1629: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1630: return '';
1631: }
1632:
1633: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1634: &escape('Checkin - '.$token)) ne 'ok') {
1635: return '';
1636: }
1637:
1638: return ($symb,$tuname,$tudom,$tcrsid);
1.110 www 1639: }
1640:
1641: # --------------------------------------------- Set Expire Date for Spreadsheet
1642:
1643: sub expirespread {
1644: my ($uname,$udom,$stype,$usymb)=@_;
1645: my $cid=$ENV{'request.course.id'};
1646: if ($cid) {
1647: my $now=time;
1648: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1649: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1650: $ENV{'course.'.$cid.'.num'}.
1651: ':nohist_expirationdates:'.
1652: &escape($key).'='.$now,
1653: $ENV{'course.'.$cid.'.home'})
1654: }
1655: return 'ok';
1.14 www 1656: }
1657:
1.109 www 1658: # ----------------------------------------------------- Devalidate Spreadsheets
1659:
1660: sub devalidate {
1.325 www 1661: my ($symb,$uname,$udom)=@_;
1.109 www 1662: my $cid=$ENV{'request.course.id'};
1663: if ($cid) {
1.391 matthew 1664: # delete the stored spreadsheets for
1665: # - the student level sheet of this user in course's homespace
1666: # - the assessment level sheet for this resource
1667: # for this user in user's homespace
1.325 www 1668: my $key=$uname.':'.$udom.':';
1.109 www 1669: my $status=
1.299 matthew 1670: &del('nohist_calculatedsheets',
1.391 matthew 1671: [$key.'studentcalc:'],
1.133 albertel 1672: $ENV{'course.'.$cid.'.domain'},
1673: $ENV{'course.'.$cid.'.num'})
1674: .' '.
1675: &del('nohist_calculatedsheets_'.$cid,
1.391 matthew 1676: [$key.'assesscalc:'.$symb],$udom,$uname);
1.109 www 1677: unless ($status eq 'ok ok') {
1678: &logthis('Could not devalidate spreadsheet '.
1.325 www 1679: $uname.' at '.$udom.' for '.
1.109 www 1680: $symb.': '.$status);
1.133 albertel 1681: }
1.109 www 1682: }
1683: }
1684:
1.265 albertel 1685: sub get_scalar {
1686: my ($string,$end) = @_;
1687: my $value;
1688: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1689: $value = $1;
1690: } elsif ($$string =~ s/^([^&]*?)&//) {
1691: $value = $1;
1692: }
1693: return &unescape($value);
1694: }
1695:
1696: sub array2str {
1697: my (@array) = @_;
1698: my $result=&arrayref2str(\@array);
1699: $result=~s/^__ARRAY_REF__//;
1700: $result=~s/__END_ARRAY_REF__$//;
1701: return $result;
1702: }
1703:
1.204 albertel 1704: sub arrayref2str {
1705: my ($arrayref) = @_;
1.265 albertel 1706: my $result='__ARRAY_REF__';
1.204 albertel 1707: foreach my $elem (@$arrayref) {
1.265 albertel 1708: if(ref($elem) eq 'ARRAY') {
1709: $result.=&arrayref2str($elem).'&';
1710: } elsif(ref($elem) eq 'HASH') {
1711: $result.=&hashref2str($elem).'&';
1712: } elsif(ref($elem)) {
1713: #print("Got a ref of ".(ref($elem))." skipping.");
1.204 albertel 1714: } else {
1715: $result.=&escape($elem).'&';
1716: }
1717: }
1718: $result=~s/\&$//;
1.265 albertel 1719: $result .= '__END_ARRAY_REF__';
1.204 albertel 1720: return $result;
1721: }
1722:
1.168 albertel 1723: sub hash2str {
1.204 albertel 1724: my (%hash) = @_;
1725: my $result=&hashref2str(\%hash);
1.265 albertel 1726: $result=~s/^__HASH_REF__//;
1727: $result=~s/__END_HASH_REF__$//;
1.204 albertel 1728: return $result;
1729: }
1730:
1731: sub hashref2str {
1732: my ($hashref)=@_;
1.265 albertel 1733: my $result='__HASH_REF__';
1.204 albertel 1734: foreach (keys(%$hashref)) {
1735: if (ref($_) eq 'ARRAY') {
1.265 albertel 1736: $result.=&arrayref2str($_).'=';
1.204 albertel 1737: } elsif (ref($_) eq 'HASH') {
1.265 albertel 1738: $result.=&hashref2str($_).'=';
1.204 albertel 1739: } elsif (ref($_)) {
1.265 albertel 1740: $result.='=';
1741: #print("Got a ref of ".(ref($_))." skipping.");
1.204 albertel 1742: } else {
1.265 albertel 1743: if ($_) {$result.=&escape($_).'=';} else { last; }
1.204 albertel 1744: }
1745:
1.265 albertel 1746: if(ref($hashref->{$_}) eq 'ARRAY') {
1747: $result.=&arrayref2str($hashref->{$_}).'&';
1748: } elsif(ref($hashref->{$_}) eq 'HASH') {
1749: $result.=&hashref2str($hashref->{$_}).'&';
1750: } elsif(ref($hashref->{$_})) {
1751: $result.='&';
1752: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1.204 albertel 1753: } else {
1.265 albertel 1754: $result.=&escape($hashref->{$_}).'&';
1.204 albertel 1755: }
1756: }
1.168 albertel 1757: $result=~s/\&$//;
1.265 albertel 1758: $result .= '__END_HASH_REF__';
1.168 albertel 1759: return $result;
1760: }
1761:
1762: sub str2hash {
1.265 albertel 1763: my ($string)=@_;
1764: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1765: return %$hash;
1766: }
1767:
1768: sub str2hashref {
1.168 albertel 1769: my ($string) = @_;
1.265 albertel 1770:
1771: my %hash;
1772:
1773: if($string !~ /^__HASH_REF__/) {
1774: if (! ($string eq '' || !defined($string))) {
1775: $hash{'error'}='Not hash reference';
1776: }
1777: return (\%hash, $string);
1778: }
1779:
1780: $string =~ s/^__HASH_REF__//;
1781:
1782: while($string !~ /^__END_HASH_REF__/) {
1783: #key
1784: my $key='';
1785: if($string =~ /^__HASH_REF__/) {
1786: ($key, $string)=&str2hashref($string);
1787: if(defined($key->{'error'})) {
1788: $hash{'error'}='Bad data';
1789: return (\%hash, $string);
1790: }
1791: } elsif($string =~ /^__ARRAY_REF__/) {
1792: ($key, $string)=&str2arrayref($string);
1793: if($key->[0] eq 'Array reference error') {
1794: $hash{'error'}='Bad data';
1795: return (\%hash, $string);
1796: }
1797: } else {
1798: $string =~ s/^(.*?)=//;
1.267 albertel 1799: $key=&unescape($1);
1.265 albertel 1800: }
1801: $string =~ s/^=//;
1802:
1803: #value
1804: my $value='';
1805: if($string =~ /^__HASH_REF__/) {
1806: ($value, $string)=&str2hashref($string);
1807: if(defined($value->{'error'})) {
1808: $hash{'error'}='Bad data';
1809: return (\%hash, $string);
1810: }
1811: } elsif($string =~ /^__ARRAY_REF__/) {
1812: ($value, $string)=&str2arrayref($string);
1813: if($value->[0] eq 'Array reference error') {
1814: $hash{'error'}='Bad data';
1815: return (\%hash, $string);
1816: }
1817: } else {
1818: $value=&get_scalar(\$string,'__END_HASH_REF__');
1819: }
1820: $string =~ s/^&//;
1821:
1822: $hash{$key}=$value;
1.204 albertel 1823: }
1.265 albertel 1824:
1825: $string =~ s/^__END_HASH_REF__//;
1826:
1827: return (\%hash, $string);
1.204 albertel 1828: }
1829:
1830: sub str2array {
1.265 albertel 1831: my ($string)=@_;
1832: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1833: return @$array;
1834: }
1835:
1836: sub str2arrayref {
1.204 albertel 1837: my ($string) = @_;
1.265 albertel 1838: my @array;
1839:
1840: if($string !~ /^__ARRAY_REF__/) {
1841: if (! ($string eq '' || !defined($string))) {
1842: $array[0]='Array reference error';
1843: }
1844: return (\@array, $string);
1845: }
1846:
1847: $string =~ s/^__ARRAY_REF__//;
1848:
1849: while($string !~ /^__END_ARRAY_REF__/) {
1850: my $value='';
1851: if($string =~ /^__HASH_REF__/) {
1852: ($value, $string)=&str2hashref($string);
1853: if(defined($value->{'error'})) {
1854: $array[0] ='Array reference error';
1855: return (\@array, $string);
1856: }
1857: } elsif($string =~ /^__ARRAY_REF__/) {
1858: ($value, $string)=&str2arrayref($string);
1859: if($value->[0] eq 'Array reference error') {
1860: $array[0] ='Array reference error';
1861: return (\@array, $string);
1862: }
1863: } else {
1864: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1865: }
1866: $string =~ s/^&//;
1867:
1868: push(@array, $value);
1.191 harris41 1869: }
1.265 albertel 1870:
1871: $string =~ s/^__END_ARRAY_REF__//;
1872:
1873: return (\@array, $string);
1.168 albertel 1874: }
1875:
1.167 albertel 1876: # -------------------------------------------------------------------Temp Store
1877:
1.168 albertel 1878: sub tmpreset {
1879: my ($symb,$namespace,$domain,$stuname) = @_;
1880: if (!$symb) {
1881: $symb=&symbread();
1.380 albertel 1882: if (!$symb) { $symb= $ENV{'request.url'}; }
1.168 albertel 1883: }
1884: $symb=escape($symb);
1885:
1886: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1887: $namespace=~s/\//\_/g;
1888: $namespace=~s/\W//g;
1889:
1890: #FIXME needs to do something for /pub resources
1891: if (!$domain) { $domain=$ENV{'user.domain'}; }
1892: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1893: my $path=$perlvar{'lonDaemons'}.'/tmp';
1894: my %hash;
1895: if (tie(%hash,'GDBM_File',
1896: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1.256 albertel 1897: &GDBM_WRCREAT(),0640)) {
1.168 albertel 1898: foreach my $key (keys %hash) {
1.180 albertel 1899: if ($key=~ /:$symb/) {
1.168 albertel 1900: delete($hash{$key});
1901: }
1902: }
1903: }
1904: }
1905:
1.167 albertel 1906: sub tmpstore {
1.168 albertel 1907: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1908:
1909: if (!$symb) {
1910: $symb=&symbread();
1911: if (!$symb) { $symb= $ENV{'request.url'}; }
1912: }
1913: $symb=escape($symb);
1914:
1915: if (!$namespace) {
1916: # I don't think we would ever want to store this for a course.
1917: # it seems this will only be used if we don't have a course.
1918: #$namespace=$ENV{'request.course.id'};
1919: #if (!$namespace) {
1920: $namespace=$ENV{'request.state'};
1921: #}
1922: }
1923: $namespace=~s/\//\_/g;
1924: $namespace=~s/\W//g;
1925: #FIXME needs to do something for /pub resources
1926: if (!$domain) { $domain=$ENV{'user.domain'}; }
1927: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1928: my $now=time;
1929: my %hash;
1930: my $path=$perlvar{'lonDaemons'}.'/tmp';
1931: if (tie(%hash,'GDBM_File',
1932: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1.256 albertel 1933: &GDBM_WRCREAT(),0640)) {
1.168 albertel 1934: $hash{"version:$symb"}++;
1935: my $version=$hash{"version:$symb"};
1936: my $allkeys='';
1937: foreach my $key (keys(%$storehash)) {
1938: $allkeys.=$key.':';
1939: $hash{"$version:$symb:$key"}=$$storehash{$key};
1940: }
1941: $hash{"$version:$symb:timestamp"}=$now;
1942: $allkeys.='timestamp';
1943: $hash{"$version:keys:$symb"}=$allkeys;
1944: if (untie(%hash)) {
1945: return 'ok';
1946: } else {
1947: return "error:$!";
1948: }
1949: } else {
1950: return "error:$!";
1951: }
1952: }
1.167 albertel 1953:
1.168 albertel 1954: # -----------------------------------------------------------------Temp Restore
1.167 albertel 1955:
1.168 albertel 1956: sub tmprestore {
1957: my ($symb,$namespace,$domain,$stuname) = @_;
1.167 albertel 1958:
1.168 albertel 1959: if (!$symb) {
1960: $symb=&symbread();
1961: if (!$symb) { $symb= $ENV{'request.url'}; }
1962: }
1963: $symb=escape($symb);
1964:
1965: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1966: #FIXME needs to do something for /pub resources
1967: if (!$domain) { $domain=$ENV{'user.domain'}; }
1968: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1969:
1970: my %returnhash;
1971: $namespace=~s/\//\_/g;
1972: $namespace=~s/\W//g;
1973: my %hash;
1974: my $path=$perlvar{'lonDaemons'}.'/tmp';
1975: if (tie(%hash,'GDBM_File',
1976: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1.256 albertel 1977: &GDBM_READER(),0640)) {
1.168 albertel 1978: my $version=$hash{"version:$symb"};
1979: $returnhash{'version'}=$version;
1980: my $scope;
1981: for ($scope=1;$scope<=$version;$scope++) {
1982: my $vkeys=$hash{"$scope:keys:$symb"};
1983: my @keys=split(/:/,$vkeys);
1984: my $key;
1985: $returnhash{"$scope:keys"}=$vkeys;
1986: foreach $key (@keys) {
1987: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1988: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1.167 albertel 1989: }
1990: }
1.168 albertel 1991: if (!(untie(%hash))) {
1992: return "error:$!";
1993: }
1994: } else {
1995: return "error:$!";
1996: }
1997: return %returnhash;
1.167 albertel 1998: }
1999:
1.9 www 2000: # ----------------------------------------------------------------------- Store
2001:
2002: sub store {
1.124 www 2003: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2004: my $home='';
2005:
1.168 albertel 2006: if ($stuname) { $home=&homeserver($stuname,$domain); }
1.124 www 2007:
1.213 www 2008: $symb=&symbclean($symb);
1.122 albertel 2009: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1.109 www 2010:
1.325 www 2011: if (!$domain) { $domain=$ENV{'user.domain'}; }
2012: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2013:
2014: &devalidate($symb,$stuname,$domain);
1.109 www 2015:
2016: $symb=escape($symb);
1.187 www 2017: if (!$namespace) {
2018: unless ($namespace=$ENV{'request.course.id'}) {
2019: return '';
2020: }
2021: }
1.122 albertel 2022: if (!$home) { $home=$ENV{'user.home'}; }
1.12 www 2023: my $namevalue='';
1.191 harris41 2024: foreach (keys %$storehash) {
1.122 albertel 2025: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1.191 harris41 2026: }
1.12 www 2027: $namevalue=~s/\&$//;
1.187 www 2028: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1.124 www 2029: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1.9 www 2030: }
2031:
1.47 www 2032: # -------------------------------------------------------------- Critical Store
2033:
2034: sub cstore {
1.124 www 2035: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2036: my $home='';
2037:
1.168 albertel 2038: if ($stuname) { $home=&homeserver($stuname,$domain); }
1.124 www 2039:
1.213 www 2040: $symb=&symbclean($symb);
1.122 albertel 2041: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1.109 www 2042:
1.325 www 2043: if (!$domain) { $domain=$ENV{'user.domain'}; }
2044: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2045:
2046: &devalidate($symb,$stuname,$domain);
1.109 www 2047:
2048: $symb=escape($symb);
1.187 www 2049: if (!$namespace) {
2050: unless ($namespace=$ENV{'request.course.id'}) {
2051: return '';
2052: }
2053: }
1.122 albertel 2054: if (!$home) { $home=$ENV{'user.home'}; }
2055:
1.47 www 2056: my $namevalue='';
1.191 harris41 2057: foreach (keys %$storehash) {
1.122 albertel 2058: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1.191 harris41 2059: }
1.47 www 2060: $namevalue=~s/\&$//;
1.187 www 2061: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1.188 www 2062: return critical
2063: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1.47 www 2064: }
2065:
1.9 www 2066: # --------------------------------------------------------------------- Restore
2067:
2068: sub restore {
1.124 www 2069: my ($symb,$namespace,$domain,$stuname) = @_;
2070: my $home='';
2071:
1.168 albertel 2072: if ($stuname) { $home=&homeserver($stuname,$domain); }
1.124 www 2073:
1.122 albertel 2074: if (!$symb) {
2075: unless ($symb=escape(&symbread())) { return ''; }
2076: } else {
1.213 www 2077: $symb=&escape(&symbclean($symb));
1.122 albertel 2078: }
1.188 www 2079: if (!$namespace) {
2080: unless ($namespace=$ENV{'request.course.id'}) {
2081: return '';
2082: }
2083: }
1.122 albertel 2084: if (!$domain) { $domain=$ENV{'user.domain'}; }
2085: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2086: if (!$home) { $home=$ENV{'user.home'}; }
2087: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2088:
1.12 www 2089: my %returnhash=();
1.191 harris41 2090: foreach (split(/\&/,$answer)) {
1.12 www 2091: my ($name,$value)=split(/\=/,$_);
2092: $returnhash{&unescape($name)}=&unescape($value);
1.191 harris41 2093: }
1.75 www 2094: my $version;
2095: for ($version=1;$version<=$returnhash{'version'};$version++) {
1.191 harris41 2096: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1.75 www 2097: $returnhash{$_}=$returnhash{$version.':'.$_};
1.191 harris41 2098: }
1.75 www 2099: }
1.13 www 2100: return %returnhash;
1.34 www 2101: }
2102:
2103: # ---------------------------------------------------------- Course Description
2104:
2105: sub coursedescription {
2106: my $courseid=shift;
2107: $courseid=~s/^\///;
1.49 www 2108: $courseid=~s/\_/\//g;
1.34 www 2109: my ($cdomain,$cnum)=split(/\//,$courseid);
1.129 albertel 2110: my $chome=&homeserver($cnum,$cdomain);
1.302 albertel 2111: my $normalid=$cdomain.'_'.$cnum;
2112: # need to always cache even if we get errors otherwise we keep
2113: # trying and trying and trying to get the course description.
2114: my %envhash=();
2115: my %returnhash=();
2116: $envhash{'course.'.$normalid.'.last_cache'}=time;
1.34 www 2117: if ($chome ne 'no_host') {
1.302 albertel 2118: %returnhash=&dump('environment',$cdomain,$cnum);
1.129 albertel 2119: if (!exists($returnhash{'con_lost'})) {
2120: $returnhash{'home'}= $chome;
2121: $returnhash{'domain'} = $cdomain;
2122: $returnhash{'num'} = $cnum;
1.130 albertel 2123: while (my ($name,$value) = each %returnhash) {
1.53 www 2124: $envhash{'course.'.$normalid.'.'.$name}=$value;
1.129 albertel 2125: }
1.270 www 2126: $returnhash{'url'}=&clutter($returnhash{'url'});
1.34 www 2127: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1.38 www 2128: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1.60 www 2129: $envhash{'course.'.$normalid.'.home'}=$chome;
2130: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2131: $envhash{'course.'.$normalid.'.num'}=$cnum;
1.34 www 2132: }
2133: }
1.302 albertel 2134: &appenv(%envhash);
2135: return %returnhash;
1.9 www 2136: }
1.1 albertel 2137:
1.103 harris41 2138: # -------------------------------------------------------- Get user privileges
1.11 www 2139:
2140: sub rolesinit {
2141: my ($domain,$username,$authhost)=@_;
2142: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1.12 www 2143: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1.11 www 2144: my %allroles=();
2145: my %thesepriv=();
2146: my $now=time;
1.21 www 2147: my $userroles="user.login.time=$now\n";
1.11 www 2148: my $thesestr;
2149:
2150: if ($rolesdump ne '') {
1.191 harris41 2151: foreach (split(/&/,$rolesdump)) {
1.21 www 2152: if ($_!~/^rolesdef\&/) {
1.11 www 2153: my ($area,$role)=split(/=/,$_);
1.21 www 2154: $area=~s/\_\w\w$//;
1.11 www 2155: my ($trole,$tend,$tstart)=split(/_/,$role);
1.21 www 2156: $userroles.='user.role.'.$trole.'.'.$area.'='.
2157: $tstart.'.'.$tend."\n";
1.349 www 2158: # log the associated role with the area
2159: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
1.11 www 2160: if ($tend!=0) {
2161: if ($tend<$now) {
2162: $trole='';
2163: }
2164: }
2165: if ($tstart!=0) {
2166: if ($tstart>$now) {
2167: $trole='';
2168: }
2169: }
2170: if (($area ne '') && ($trole ne '')) {
1.347 albertel 2171: my $spec=$trole.'.'.$area;
2172: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2173: if ($trole =~ /^cr\//) {
2174: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1.392 www 2175: my $homsvr=homeserver($rauthor,$rdomain);
1.347 albertel 2176: if ($hostname{$homsvr} ne '') {
1.392 www 2177: my ($rdummy,$roledef)=
2178: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2179:
2180: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
1.347 albertel 2181: my ($syspriv,$dompriv,$coursepriv)=
1.392 www 2182: split(/\_/,$roledef);
1.347 albertel 2183: if (defined($syspriv)) {
2184: $allroles{'cm./'}.=':'.$syspriv;
2185: $allroles{$spec.'./'}.=':'.$syspriv;
2186: }
2187: if ($tdomain ne '') {
2188: if (defined($dompriv)) {
2189: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2190: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2191: }
2192: if ($trest ne '') {
2193: if (defined($coursepriv)) {
2194: $allroles{'cm.'.$area}.=':'.$coursepriv;
2195: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
2196: }
2197: }
2198: }
2199: }
2200: }
2201: } else {
2202: if (defined($pr{$trole.':s'})) {
2203: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
2204: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2205: }
2206: if ($tdomain ne '') {
2207: if (defined($pr{$trole.':d'})) {
2208: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2209: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2210: }
2211: if ($trest ne '') {
2212: if (defined($pr{$trole.':c'})) {
2213: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2214: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2215: }
2216: }
2217: }
2218: }
1.12 www 2219: }
2220: }
1.191 harris41 2221: }
1.125 www 2222: my $adv=0;
1.128 www 2223: my $author=0;
1.191 harris41 2224: foreach (keys %allroles) {
1.11 www 2225: %thesepriv=();
1.146 www 2226: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1.128 www 2227: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1.191 harris41 2228: foreach (split(/:/,$allroles{$_})) {
1.11 www 2229: if ($_ ne '') {
1.103 harris41 2230: my ($privilege,$restrictions)=split(/&/,$_);
1.11 www 2231: if ($restrictions eq '') {
1.103 harris41 2232: $thesepriv{$privilege}='F';
1.11 www 2233: } else {
1.103 harris41 2234: if ($thesepriv{$privilege} ne 'F') {
2235: $thesepriv{$privilege}.=$restrictions;
1.11 www 2236: }
2237: }
2238: }
1.191 harris41 2239: }
1.11 www 2240: $thesestr='';
1.191 harris41 2241: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1.11 www 2242: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1.191 harris41 2243: }
1.128 www 2244: $userroles.='user.adv='.$adv."\n".
2245: 'user.author='.$author."\n";
1.126 www 2246: $ENV{'user.adv'}=$adv;
1.11 www 2247: }
2248: return $userroles;
2249: }
2250:
1.12 www 2251: # --------------------------------------------------------------- get interface
2252:
2253: sub get {
1.131 albertel 2254: my ($namespace,$storearr,$udomain,$uname)=@_;
1.12 www 2255: my $items='';
1.191 harris41 2256: foreach (@$storearr) {
1.12 www 2257: $items.=escape($_).'&';
1.191 harris41 2258: }
1.12 www 2259: $items=~s/\&$//;
1.131 albertel 2260: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2261: if (!$uname) { $uname=$ENV{'user.name'}; }
2262: my $uhome=&homeserver($uname,$udomain);
2263:
1.133 albertel 2264: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1.15 www 2265: my @pairs=split(/\&/,$rep);
1.273 albertel 2266: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2267: return @pairs;
2268: }
1.15 www 2269: my %returnhash=();
1.42 www 2270: my $i=0;
1.191 harris41 2271: foreach (@$storearr) {
1.42 www 2272: $returnhash{$_}=unescape($pairs[$i]);
2273: $i++;
1.191 harris41 2274: }
1.15 www 2275: return %returnhash;
1.27 www 2276: }
2277:
2278: # --------------------------------------------------------------- del interface
2279:
2280: sub del {
1.133 albertel 2281: my ($namespace,$storearr,$udomain,$uname)=@_;
1.27 www 2282: my $items='';
1.191 harris41 2283: foreach (@$storearr) {
1.27 www 2284: $items.=escape($_).'&';
1.191 harris41 2285: }
1.27 www 2286: $items=~s/\&$//;
1.133 albertel 2287: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2288: if (!$uname) { $uname=$ENV{'user.name'}; }
2289: my $uhome=&homeserver($uname,$udomain);
2290:
2291: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1.15 www 2292: }
2293:
2294: # -------------------------------------------------------------- dump interface
2295:
2296: sub dump {
1.193 www 2297: my ($namespace,$udomain,$uname,$regexp)=@_;
1.129 albertel 2298: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2299: if (!$uname) { $uname=$ENV{'user.name'}; }
2300: my $uhome=&homeserver($uname,$udomain);
1.193 www 2301: if ($regexp) {
2302: $regexp=&escape($regexp);
2303: } else {
2304: $regexp='.';
2305: }
2306: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1.12 www 2307: my @pairs=split(/\&/,$rep);
2308: my %returnhash=();
1.191 harris41 2309: foreach (@pairs) {
1.12 www 2310: my ($key,$value)=split(/=/,$_);
1.29 www 2311: $returnhash{unescape($key)}=unescape($value);
1.318 matthew 2312: }
2313: return %returnhash;
1.407 www 2314: }
2315:
2316: # -------------------------------------------------------------- keys interface
2317:
2318: sub getkeys {
2319: my ($namespace,$udomain,$uname)=@_;
2320: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2321: if (!$uname) { $uname=$ENV{'user.name'}; }
2322: my $uhome=&homeserver($uname,$udomain);
2323: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2324: my @keyarray=();
2325: foreach (split(/\&/,$rep)) {
2326: push (@keyarray,&unescape($_));
2327: }
2328: return @keyarray;
1.318 matthew 2329: }
2330:
1.319 matthew 2331: # --------------------------------------------------------------- currentdump
2332: sub currentdump {
1.328 matthew 2333: my ($courseid,$sdom,$sname)=@_;
1.326 matthew 2334: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2335: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2336: $sname = $ENV{'user.name'} if (! defined($sname));
2337: my $uhome = &homeserver($sname,$sdom);
2338: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
1.318 matthew 2339: return if ($rep =~ /^(error:|no_such_host)/);
1.319 matthew 2340: #
1.318 matthew 2341: my %returnhash=();
1.319 matthew 2342: #
2343: if ($rep eq "unknown_cmd") {
2344: # an old lond will not know currentdump
2345: # Do a dump and make it look like a currentdump
1.326 matthew 2346: my @tmp = &dump($courseid,$sdom,$sname,'.');
1.319 matthew 2347: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2348: my %hash = @tmp;
2349: @tmp=();
1.424 matthew 2350: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
1.319 matthew 2351: } else {
2352: my @pairs=split(/\&/,$rep);
2353: foreach (@pairs) {
2354: my ($key,$value)=split(/=/,$_);
2355: my ($symb,$param) = split(/:/,$key);
2356: $returnhash{&unescape($symb)}->{&unescape($param)} =
2357: &unescape($value);
2358: }
1.191 harris41 2359: }
1.12 www 2360: return %returnhash;
1.424 matthew 2361: }
2362:
2363: sub convert_dump_to_currentdump{
2364: my %hash = %{shift()};
2365: my %returnhash;
2366: # Code ripped from lond, essentially. The only difference
2367: # here is the unescaping done by lonnet::dump(). Conceivably
2368: # we might run in to problems with parameter names =~ /^v\./
2369: while (my ($key,$value) = each(%hash)) {
2370: my ($v,$symb,$param) = split(/:/,$key);
2371: next if ($v eq 'version' || $symb eq 'keys');
2372: next if (exists($returnhash{$symb}) &&
2373: exists($returnhash{$symb}->{$param}) &&
2374: $returnhash{$symb}->{'v.'.$param} > $v);
2375: $returnhash{$symb}->{$param}=$value;
2376: $returnhash{$symb}->{'v.'.$param}=$v;
2377: }
2378: #
2379: # Remove all of the keys in the hashes which keep track of
2380: # the version of the parameter.
2381: while (my ($symb,$param_hash) = each(%returnhash)) {
2382: # use a foreach because we are going to delete from the hash.
2383: foreach my $key (keys(%$param_hash)) {
2384: delete($param_hash->{$key}) if ($key =~ /^v\./);
2385: }
2386: }
2387: return \%returnhash;
1.12 www 2388: }
2389:
2390: # --------------------------------------------------------------- put interface
2391:
2392: sub put {
1.134 albertel 2393: my ($namespace,$storehash,$udomain,$uname)=@_;
2394: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2395: if (!$uname) { $uname=$ENV{'user.name'}; }
2396: my $uhome=&homeserver($uname,$udomain);
1.12 www 2397: my $items='';
1.191 harris41 2398: foreach (keys %$storehash) {
1.134 albertel 2399: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1.191 harris41 2400: }
1.12 www 2401: $items=~s/\&$//;
1.134 albertel 2402: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1.47 www 2403: }
2404:
2405: # ------------------------------------------------------ critical put interface
2406:
2407: sub cput {
1.134 albertel 2408: my ($namespace,$storehash,$udomain,$uname)=@_;
2409: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2410: if (!$uname) { $uname=$ENV{'user.name'}; }
2411: my $uhome=&homeserver($uname,$udomain);
1.47 www 2412: my $items='';
1.191 harris41 2413: foreach (keys %$storehash) {
1.134 albertel 2414: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1.191 harris41 2415: }
1.47 www 2416: $items=~s/\&$//;
1.134 albertel 2417: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1.12 www 2418: }
2419:
2420: # -------------------------------------------------------------- eget interface
2421:
2422: sub eget {
1.133 albertel 2423: my ($namespace,$storearr,$udomain,$uname)=@_;
1.12 www 2424: my $items='';
1.191 harris41 2425: foreach (@$storearr) {
1.12 www 2426: $items.=escape($_).'&';
1.191 harris41 2427: }
1.12 www 2428: $items=~s/\&$//;
1.133 albertel 2429: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2430: if (!$uname) { $uname=$ENV{'user.name'}; }
2431: my $uhome=&homeserver($uname,$udomain);
2432: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1.12 www 2433: my @pairs=split(/\&/,$rep);
2434: my %returnhash=();
1.42 www 2435: my $i=0;
1.191 harris41 2436: foreach (@$storearr) {
1.42 www 2437: $returnhash{$_}=unescape($pairs[$i]);
2438: $i++;
1.191 harris41 2439: }
1.12 www 2440: return %returnhash;
2441: }
2442:
1.341 www 2443: # ---------------------------------------------- Custom access rule evaluation
2444:
2445: sub customaccess {
2446: my ($priv,$uri)=@_;
1.342 www 2447: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
1.343 www 2448: $urealm=~s/^\W//;
2449: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
1.341 www 2450: my $access=0;
2451: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
1.342 www 2452: my ($effect,$realm,$role)=split(/\:/,$_);
1.343 www 2453: if ($role) {
2454: if ($role ne $urole) { next; }
2455: }
2456: foreach (split(/\s*\,\s*/,$realm)) {
2457: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2458: if ($tdom) {
2459: if ($tdom ne $udom) { next; }
2460: }
2461: if ($tcrs) {
2462: if ($tcrs ne $ucrs) { next; }
2463: }
2464: if ($tsec) {
2465: if ($tsec ne $usec) { next; }
2466: }
2467: $access=($effect eq 'allow');
2468: last;
1.342 www 2469: }
1.402 bowersj2 2470: if ($realm eq '' && $role eq '') {
2471: $access=($effect eq 'allow');
2472: }
1.341 www 2473: }
2474: return $access;
2475: }
2476:
1.103 harris41 2477: # ------------------------------------------------- Check for a user privilege
1.12 www 2478:
2479: sub allowed {
2480: my ($priv,$uri)=@_;
1.152 www 2481:
2482: my $orguri=$uri;
1.52 www 2483: $uri=&declutter($uri);
1.29 www 2484:
1.398 albertel 2485: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
1.54 www 2486: # Free bre access to adm and meta resources
1.29 www 2487:
1.54 www 2488: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1.14 www 2489: return 'F';
1.159 www 2490: }
2491:
2492: # Free bre to public access
2493:
2494: if ($priv eq 'bre') {
1.238 www 2495: my $copyright=&metadata($uri,'copyright');
1.301 www 2496: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2497: return 'F';
2498: }
1.238 www 2499: if ($copyright eq 'priv') {
2500: $uri=~/([^\/]+)\/([^\/]+)\//;
2501: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2502: return '';
2503: }
2504: }
2505: if ($copyright eq 'domain') {
2506: $uri=~/([^\/]+)\/([^\/]+)\//;
2507: unless (($ENV{'user.domain'} eq $1) ||
2508: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2509: return '';
2510: }
1.262 matthew 2511: }
2512: if ($ENV{'request.role'}=~ /li\.\//) {
2513: # Library role, so allow browsing of resources in this domain.
2514: return 'F';
1.238 www 2515: }
1.341 www 2516: if ($copyright eq 'custom') {
2517: unless (&customaccess($priv,$uri)) { return ''; }
2518: }
1.14 www 2519: }
1.264 matthew 2520: # Domain coordinator is trying to create a course
2521: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2522: # uri is the requested domain in this case.
2523: # comparison to 'request.role.domain' shows if the user has selected
2524: # a role of dc for the domain in question.
2525: return 'F' if ($uri eq $ENV{'request.role.domain'});
2526: }
1.29 www 2527:
1.52 www 2528: my $thisallowed='';
2529: my $statecond=0;
2530: my $courseprivid='';
2531:
2532: # Course
2533:
2534: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
2535: $thisallowed.=$1;
2536: }
1.29 www 2537:
1.52 www 2538: # Domain
2539:
2540: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2541: =~/$priv\&([^\:]*)/) {
1.12 www 2542: $thisallowed.=$1;
2543: }
1.52 www 2544:
2545: # Course: uri itself is a course
1.66 www 2546: my $courseuri=$uri;
2547: $courseuri=~s/\_(\d)/\/$1/;
1.83 www 2548: $courseuri=~s/^([^\/])/\/$1/;
1.81 www 2549:
1.83 www 2550: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1.52 www 2551: =~/$priv\&([^\:]*)/) {
1.12 www 2552: $thisallowed.=$1;
2553: }
1.29 www 2554:
1.314 www 2555: # URI is an uploaded document for this course
2556:
2557: if (($priv eq 'bre') &&
2558: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2559: return 'F';
2560: }
1.52 www 2561: # Full access at system, domain or course-wide level? Exit.
1.29 www 2562:
2563: if ($thisallowed=~/F/) {
2564: return 'F';
2565: }
2566:
1.52 www 2567: # If this is generating or modifying users, exit with special codes
1.29 www 2568:
1.166 www 2569: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1.52 www 2570: return $thisallowed;
2571: }
2572: #
1.103 harris41 2573: # Gathered so far: system, domain and course wide privileges
1.52 www 2574: #
2575: # Course: See if uri or referer is an individual resource that is part of
2576: # the course
2577:
2578: if ($ENV{'request.course.id'}) {
1.232 www 2579:
1.52 www 2580: $courseprivid=$ENV{'request.course.id'};
2581: if ($ENV{'request.course.sec'}) {
2582: $courseprivid.='/'.$ENV{'request.course.sec'};
2583: }
2584: $courseprivid=~s/\_/\//;
2585: my $checkreferer=1;
1.232 www 2586: my ($match,$cond)=&is_on_map($uri);
2587: if ($match) {
2588: $statecond=$cond;
1.52 www 2589: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2590: =~/$priv\&([^\:]*)/) {
2591: $thisallowed.=$1;
2592: $checkreferer=0;
2593: }
1.29 www 2594: }
1.83 www 2595:
1.148 www 2596: if ($checkreferer) {
1.152 www 2597: my $refuri=$ENV{'httpref.'.$orguri};
1.148 www 2598: unless ($refuri) {
1.191 harris41 2599: foreach (keys %ENV) {
1.148 www 2600: if ($_=~/^httpref\..*\*/) {
2601: my $pattern=$_;
1.156 www 2602: $pattern=~s/^httpref\.\/res\///;
1.148 www 2603: $pattern=~s/\*/\[\^\/\]\+/g;
2604: $pattern=~s/\//\\\//g;
1.152 www 2605: if ($orguri=~/$pattern/) {
1.148 www 2606: $refuri=$ENV{$_};
2607: }
2608: }
1.191 harris41 2609: }
1.148 www 2610: }
1.232 www 2611:
1.148 www 2612: if ($refuri) {
1.152 www 2613: $refuri=&declutter($refuri);
1.232 www 2614: my ($match,$cond)=&is_on_map($refuri);
2615: if ($match) {
2616: my $refstatecond=$cond;
1.52 www 2617: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2618: =~/$priv\&([^\:]*)/) {
2619: $thisallowed.=$1;
1.53 www 2620: $uri=$refuri;
2621: $statecond=$refstatecond;
1.52 www 2622: }
2623: }
1.148 www 2624: }
1.29 www 2625: }
1.52 www 2626: }
1.29 www 2627:
1.52 www 2628: #
1.103 harris41 2629: # Gathered now: all privileges that could apply, and condition number
1.52 www 2630: #
2631: #
2632: # Full or no access?
2633: #
1.29 www 2634:
1.52 www 2635: if ($thisallowed=~/F/) {
2636: return 'F';
2637: }
1.29 www 2638:
1.52 www 2639: unless ($thisallowed) {
2640: return '';
2641: }
1.29 www 2642:
1.52 www 2643: # Restrictions exist, deal with them
2644: #
2645: # C:according to course preferences
2646: # R:according to resource settings
2647: # L:unless locked
2648: # X:according to user session state
2649: #
2650:
2651: # Possibly locked functionality, check all courses
1.54 www 2652: # Locks might take effect only after 10 minutes cache expiration for other
2653: # courses, and 2 minutes for current course
1.52 www 2654:
2655: my $envkey;
2656: if ($thisallowed=~/L/) {
2657: foreach $envkey (keys %ENV) {
1.54 www 2658: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2659: my $courseid=$2;
2660: my $roleid=$1.'.'.$2;
1.92 www 2661: $courseid=~s/^\///;
1.54 www 2662: my $expiretime=600;
2663: if ($ENV{'request.role'} eq $roleid) {
2664: $expiretime=120;
2665: }
2666: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2667: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2668: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2669: &coursedescription($courseid);
2670: }
2671: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2672: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2673: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1.57 www 2674: &log($ENV{'user.domain'},$ENV{'user.name'},
1.239 www 2675: $ENV{'user.home'},
1.57 www 2676: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1.52 www 2677: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1.54 www 2678: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1.52 www 2679: return '';
2680: }
2681: }
1.54 www 2682: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2683: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2684: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1.57 www 2685: &log($ENV{'user.domain'},$ENV{'user.name'},
1.239 www 2686: $ENV{'user.home'},
1.57 www 2687: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1.52 www 2688: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1.54 www 2689: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1.52 www 2690: return '';
2691: }
2692: }
2693: }
1.29 www 2694: }
1.52 www 2695: }
2696:
2697: #
2698: # Rest of the restrictions depend on selected course
2699: #
2700:
2701: unless ($ENV{'request.course.id'}) {
2702: return '1';
2703: }
1.29 www 2704:
1.52 www 2705: #
2706: # Now user is definitely in a course
2707: #
1.53 www 2708:
2709:
2710: # Course preferences
2711:
2712: if ($thisallowed=~/C/) {
1.54 www 2713: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1.237 www 2714: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
1.54 www 2715: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1.194 www 2716: =~/$rolecode/) {
1.57 www 2717: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2718: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1.237 www 2719: $ENV{'request.course.id'});
2720: return '';
2721: }
2722:
2723: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2724: =~/$unamedom/) {
2725: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2726: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
1.54 www 2727: $ENV{'request.course.id'});
2728: return '';
2729: }
1.53 www 2730: }
2731:
2732: # Resource preferences
2733:
2734: if ($thisallowed=~/R/) {
1.54 www 2735: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1.341 www 2736: if (&metadata($uri,'roledeny')=~/$rolecode/) {
2737: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1.57 www 2738: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1.341 www 2739: return '';
1.54 www 2740: }
1.53 www 2741: }
1.30 www 2742:
1.246 www 2743: # Restricted by state or randomout?
1.30 www 2744:
1.52 www 2745: if ($thisallowed=~/X/) {
1.247 www 2746: if ($ENV{'acc.randomout'}) {
1.249 www 2747: my $symb=&symbread($uri,1);
1.248 www 2748: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2749: return '';
2750: }
1.247 www 2751: }
2752: if (&condval($statecond)) {
1.52 www 2753: return '2';
2754: } else {
2755: return '';
2756: }
2757: }
1.30 www 2758:
1.52 www 2759: return 'F';
1.232 www 2760: }
2761:
2762: # --------------------------------------------------- Is a resource on the map?
2763:
2764: sub is_on_map {
2765: my $uri=&declutter(shift);
2766: my @uriparts=split(/\//,$uri);
2767: my $filename=$uriparts[$#uriparts];
2768: my $pathname=$uri;
1.289 bowersj2 2769: $pathname=~s|/\Q$filename\E$||;
1.332 www 2770: $pathname=~s/^adm\/wrapper\///;
1.289 bowersj2 2771: #Trying to find the conditional for the file
1.232 www 2772: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1.289 bowersj2 2773: /\&\Q$filename\E\:([\d\|]+)\&/);
1.232 www 2774: if ($match) {
1.289 bowersj2 2775: return (1,$1);
2776: } else {
1.413 www 2777: my ($name,$ext)=($filename=~/^(.+)\.(\w+)$/);
2778: $ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2779: /\&(\Q$name\E\.\d+\.$ext)\:([\d\|]+)\&/;
2780: return (0,$2,$pathname.'/'.$1);
1.289 bowersj2 2781: }
1.12 www 2782: }
2783:
1.427 www 2784: # --------------------------------------------------------- Get symb from alias
2785:
2786: sub get_symb_from_alias {
2787: my $symb=shift;
2788: my ($map,$resid,$url)=&decode_symb($symb);
2789: # Already is a symb
2790: if ($url) { return $symb; }
2791: # Must be an alias
2792: my $aliassymb='';
2793: my %bighash;
2794: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2795: &GDBM_READER(),0640)) {
2796: my $rid=$bighash{'mapalias_'.$symb};
2797: if ($rid) {
2798: my ($mapid,$resid)=split(/\./,$rid);
1.429 ! albertel 2799: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
! 2800: $resid,$bighash{'src_'.$rid});
1.427 www 2801: }
2802: untie %bighash;
2803: }
2804: return $aliassymb;
2805: }
2806:
1.12 www 2807: # ----------------------------------------------------------------- Define Role
2808:
2809: sub definerole {
2810: if (allowed('mcr','/')) {
2811: my ($rolename,$sysrole,$domrole,$courole)=@_;
1.392 www 2812: foreach (split(':',$sysrole)) {
1.21 www 2813: my ($crole,$cqual)=split(/\&/,$_);
2814: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2815: if ($pr{'cr:s'}=~/$crole\&/) {
2816: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2817: return "refused:s:$crole&$cqual";
2818: }
2819: }
1.191 harris41 2820: }
1.392 www 2821: foreach (split(':',$domrole)) {
1.21 www 2822: my ($crole,$cqual)=split(/\&/,$_);
2823: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2824: if ($pr{'cr:d'}=~/$crole\&/) {
2825: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2826: return "refused:d:$crole&$cqual";
2827: }
2828: }
1.191 harris41 2829: }
1.392 www 2830: foreach (split(':',$courole)) {
1.21 www 2831: my ($crole,$cqual)=split(/\&/,$_);
2832: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2833: if ($pr{'cr:c'}=~/$crole\&/) {
2834: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2835: return "refused:c:$crole&$cqual";
2836: }
2837: }
1.191 harris41 2838: }
1.12 www 2839: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2840: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1.21 www 2841: "rolesdef_$rolename=".
2842: escape($sysrole.'_'.$domrole.'_'.$courole);
1.12 www 2843: return reply($command,$ENV{'user.home'});
2844: } else {
2845: return 'refused';
2846: }
1.105 harris41 2847: }
2848:
2849: # ---------------- Make a metadata query against the network of library servers
2850:
2851: sub metadata_query {
1.244 matthew 2852: my ($query,$custom,$customshow,$server_array)=@_;
1.120 harris41 2853: my %rhash;
1.244 matthew 2854: my @server_list = (defined($server_array) ? @$server_array
2855: : keys(%libserv) );
2856: for my $server (@server_list) {
1.118 harris41 2857: unless ($custom or $customshow) {
2858: my $reply=&reply("querysend:".&escape($query),$server);
2859: $rhash{$server}=$reply;
2860: }
2861: else {
2862: my $reply=&reply("querysend:".&escape($query).':'.
2863: &escape($custom).':'.&escape($customshow),
2864: $server);
2865: $rhash{$server}=$reply;
2866: }
1.112 harris41 2867: }
1.118 harris41 2868: return \%rhash;
1.240 www 2869: }
2870:
2871: # ----------------------------------------- Send log queries and wait for reply
2872:
2873: sub log_query {
2874: my ($uname,$udom,$query,%filters)=@_;
2875: my $uhome=&homeserver($uname,$udom);
2876: if ($uhome eq 'no_host') { return 'error: no_host'; }
2877: my $uhost=$hostname{$uhome};
1.241 www 2878: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
1.240 www 2879: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2880: $uhome);
2881: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
1.242 www 2882: return get_query_reply($queryid);
2883: }
2884:
2885: sub get_query_reply {
2886: my $queryid=shift;
1.240 www 2887: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2888: my $reply='';
2889: for (1..100) {
2890: sleep 2;
2891: if (-e $replyfile.'.end') {
2892: if (my $fh=Apache::File->new($replyfile)) {
2893: $reply.=<$fh>;
2894: $fh->close;
2895: } else { return 'error: reply_file_error'; }
1.242 www 2896: return &unescape($reply);
2897: }
1.240 www 2898: }
1.242 www 2899: return 'timeout:'.$queryid;
1.240 www 2900: }
2901:
2902: sub courselog_query {
1.241 www 2903: #
2904: # possible filters:
2905: # url: url or symb
2906: # username
2907: # domain
2908: # action: view, submit, grade
2909: # start: timestamp
2910: # end: timestamp
2911: #
1.240 www 2912: my (%filters)=@_;
2913: unless ($ENV{'request.course.id'}) { return 'no_course'; }
1.241 www 2914: if ($filters{'url'}) {
2915: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2916: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2917: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2918: }
1.240 www 2919: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2920: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2921: return &log_query($cname,$cdom,'courselog',%filters);
2922: }
2923:
2924: sub userlog_query {
2925: my ($uname,$udom,%filters)=@_;
2926: return &log_query($uname,$udom,'userlog',%filters);
1.12 www 2927: }
2928:
2929: # ------------------------------------------------------------------ Plain Text
2930:
2931: sub plaintext {
1.22 www 2932: my $short=shift;
1.414 www 2933: return &mt($prp{$short});
1.12 www 2934: }
2935:
2936: # ----------------------------------------------------------------- Assign Role
2937:
2938: sub assignrole {
1.357 www 2939: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
1.21 www 2940: my $mrole;
2941: if ($role =~ /^cr\//) {
1.393 www 2942: my $cwosec=$url;
2943: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2944: unless (&allowed('ccr',$cwosec)) {
1.104 www 2945: &logthis('Refused custom assignrole: '.
2946: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2947: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2948: return 'refused';
2949: }
1.21 www 2950: $mrole='cr';
2951: } else {
1.82 www 2952: my $cwosec=$url;
1.83 www 2953: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1.373 www 2954: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
1.104 www 2955: &logthis('Refused assignrole: '.
2956: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2957: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2958: return 'refused';
2959: }
1.21 www 2960: $mrole=$role;
2961: }
2962: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2963: "$udom:$uname:$url".'_'."$mrole=$role";
1.81 www 2964: if ($end) { $command.='_'.$end; }
1.21 www 2965: if ($start) {
2966: if ($end) {
1.81 www 2967: $command.='_'.$start;
1.21 www 2968: } else {
1.81 www 2969: $command.='_0_'.$start;
1.21 www 2970: }
2971: }
1.357 www 2972: # actually delete
2973: if ($deleteflag) {
1.373 www 2974: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
1.357 www 2975: # modify command to delete the role
2976: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
2977: "$udom:$uname:$url".'_'."$mrole";
1.373 www 2978: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
1.357 www 2979: # set start and finish to negative values for userrolelog
2980: $start=-1;
2981: $end=-1;
2982: }
2983: }
2984: # send command
1.349 www 2985: my $answer=&reply($command,&homeserver($uname,$udom));
1.357 www 2986: # log new user role if status is ok
1.349 www 2987: if ($answer eq 'ok') {
2988: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
2989: }
2990: return $answer;
1.169 harris41 2991: }
2992:
2993: # -------------------------------------------------- Modify user authentication
1.197 www 2994: # Overrides without validation
2995:
1.169 harris41 2996: sub modifyuserauth {
2997: my ($udom,$uname,$umode,$upass)=@_;
2998: my $uhome=&homeserver($uname,$udom);
1.197 www 2999: unless (&allowed('mau',$udom)) { return 'refused'; }
3000: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
1.272 matthew 3001: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3002: ' in domain '.$ENV{'request.role.domain'});
1.169 harris41 3003: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3004: &escape($upass),$uhome);
1.197 www 3005: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
3006: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3007: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3008: &log($udom,,$uname,$uhome,
3009: 'Authentication changed by '.$ENV{'user.domain'}.', '.
3010: $ENV{'user.name'}.', '.$umode.
3011: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
1.169 harris41 3012: unless ($reply eq 'ok') {
1.197 www 3013: &logthis('Authentication mode error: '.$reply);
1.169 harris41 3014: return 'error: '.$reply;
3015: }
1.170 harris41 3016: return 'ok';
1.80 www 3017: }
3018:
1.81 www 3019: # --------------------------------------------------------------- Modify a user
1.80 www 3020:
1.81 www 3021: sub modifyuser {
1.206 matthew 3022: my ($udom, $uname, $uid,
3023: $umode, $upass, $first,
3024: $middle, $last, $gene,
1.387 www 3025: $forceid, $desiredhome, $email)=@_;
1.198 www 3026: $udom=~s/\W//g;
3027: $uname=~s/\W//g;
1.81 www 3028: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1.80 www 3029: $umode.', '.$first.', '.$middle.', '.
1.206 matthew 3030: $last.', '.$gene.'(forceid: '.$forceid.')'.
3031: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3032: ' desiredhome not specified').
1.272 matthew 3033: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3034: ' in domain '.$ENV{'request.role.domain'});
1.230 stredwic 3035: my $uhome=&homeserver($uname,$udom,'true');
1.80 www 3036: # ----------------------------------------------------------------- Create User
1.406 albertel 3037: if (($uhome eq 'no_host') &&
3038: (($umode && $upass) || ($umode eq 'localauth'))) {
1.80 www 3039: my $unhome='';
1.209 matthew 3040: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3041: $unhome = $desiredhome;
3042: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1.80 www 3043: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1.209 matthew 3044: } else { # load balancing routine for determining $unhome
1.80 www 3045: my $tryserver;
1.81 www 3046: my $loadm=10000000;
1.80 www 3047: foreach $tryserver (keys %libserv) {
3048: if ($hostdom{$tryserver} eq $udom) {
3049: my $answer=reply('load',$tryserver);
3050: if (($answer=~/\d+/) && ($answer<$loadm)) {
3051: $loadm=$answer;
3052: $unhome=$tryserver;
3053: }
3054: }
3055: }
3056: }
3057: if (($unhome eq '') || ($unhome eq 'no_host')) {
1.206 matthew 3058: return 'error: unable to find a home server for '.$uname.
3059: ' in domain '.$udom;
1.80 www 3060: }
3061: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3062: &escape($upass),$unhome);
3063: unless ($reply eq 'ok') {
3064: return 'error: '.$reply;
3065: }
1.230 stredwic 3066: $uhome=&homeserver($uname,$udom,'true');
1.80 www 3067: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1.386 matthew 3068: return 'error: unable verify users home machine.';
1.80 www 3069: }
1.209 matthew 3070: } # End of creation of new user
1.80 www 3071: # ---------------------------------------------------------------------- Add ID
3072: if ($uid) {
3073: $uid=~tr/A-Z/a-z/;
3074: my %uidhash=&idrget($udom,$uname);
1.196 www 3075: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3076: && (!$forceid)) {
1.80 www 3077: unless ($uid eq $uidhash{$uname}) {
1.386 matthew 3078: return 'error: user id "'.$uid.'" does not match '.
3079: 'current user id "'.$uidhash{$uname}.'".';
1.80 www 3080: }
3081: } else {
3082: &idput($udom,($uname => $uid));
3083: }
3084: }
3085: # -------------------------------------------------------------- Add names, etc
1.313 matthew 3086: my @tmp=&get('environment',
1.134 albertel 3087: ['firstname','middlename','lastname','generation'],
3088: $udom,$uname);
1.313 matthew 3089: my %names;
3090: if ($tmp[0] =~ m/^error:.*/) {
3091: %names=();
3092: } else {
3093: %names = @tmp;
3094: }
1.388 www 3095: #
3096: # Make sure to not trash student environment if instructor does not bother
3097: # to supply name and email information
3098: #
3099: if ($first) { $names{'firstname'} = $first; }
1.385 matthew 3100: if (defined($middle)) { $names{'middlename'} = $middle; }
1.388 www 3101: if ($last) { $names{'lastname'} = $last; }
1.385 matthew 3102: if (defined($gene)) { $names{'generation'} = $gene; }
1.388 www 3103: if ($email) { $names{'notification'} = $email;
3104: $names{'critnotification'} = $email; }
1.387 www 3105:
1.134 albertel 3106: my $reply = &put('environment', \%names, $udom,$uname);
3107: if ($reply ne 'ok') { return 'error: '.$reply; }
1.81 www 3108: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1.80 www 3109: $umode.', '.$first.', '.$middle.', '.
3110: $last.', '.$gene.' by '.
3111: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1.134 albertel 3112: return 'ok';
1.80 www 3113: }
3114:
1.81 www 3115: # -------------------------------------------------------------- Modify student
1.80 www 3116:
1.81 www 3117: sub modifystudent {
3118: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1.387 www 3119: $end,$start,$forceid,$desiredhome,$email)=@_;
1.81 www 3120: my $cid='';
3121: unless ($cid=$ENV{'request.course.id'}) {
1.80 www 3122: return 'not_in_class';
3123: }
3124: # --------------------------------------------------------------- Make the user
1.81 www 3125: my $reply=&modifyuser
1.209 matthew 3126: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
1.387 www 3127: $desiredhome,$email);
1.80 www 3128: unless ($reply eq 'ok') { return $reply; }
1.297 matthew 3129: # This will cause &modify_student_enrollment to get the uid from the
3130: # students environment
3131: $uid = undef if (!$forceid);
3132: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
3133: $last,$gene,$usec,$end,$start);
3134: return $reply;
3135: }
3136:
3137: sub modify_student_enrollment {
3138: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
3139: # Get the course id from the environment
3140: my $cid='';
3141: unless ($cid=$ENV{'request.course.id'}) {
3142: return 'not_in_class';
3143: }
3144: # Make sure the user exists
1.81 www 3145: my $uhome=&homeserver($uname,$udom);
3146: if (($uhome eq '') || ($uhome eq 'no_host')) {
3147: return 'error: no such user';
3148: }
1.297 matthew 3149: #
3150: # Get student data if we were not given enough information
3151: if (!defined($first) || $first eq '' ||
3152: !defined($last) || $last eq '' ||
3153: !defined($uid) || $uid eq '' ||
3154: !defined($middle) || $middle eq '' ||
3155: !defined($gene) || $gene eq '') {
1.294 matthew 3156: # They did not supply us with enough data to enroll the student, so
3157: # we need to pick up more information.
1.297 matthew 3158: my %tmp = &get('environment',
1.294 matthew 3159: ['firstname','middlename','lastname', 'generation','id']
1.297 matthew 3160: ,$udom,$uname);
3161:
3162: foreach (keys(%tmp)) {
3163: &logthis("key $_ = ".$tmp{$_});
3164: }
1.294 matthew 3165: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3166: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3167: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
1.297 matthew 3168: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
1.294 matthew 3169: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3170: }
3171: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
3172: $first,$middle);
1.297 matthew 3173: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1.81 www 3174: $ENV{'course.'.$cid.'.num'}.':classlist:'.
3175: &escape($uname.':'.$udom).'='.
1.294 matthew 3176: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
1.81 www 3177: $ENV{'course.'.$cid.'.home'});
3178: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3179: return 'error: '.$reply;
3180: }
1.297 matthew 3181: # Add student role to user
1.83 www 3182: my $uurl='/'.$cid;
1.81 www 3183: $uurl=~s/\_/\//g;
3184: if ($usec) {
3185: $uurl.='/'.$usec;
3186: }
3187: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1.21 www 3188: }
3189:
1.84 www 3190: # ------------------------------------------------- Write to course preferences
3191:
3192: sub writecoursepref {
3193: my ($courseid,%prefs)=@_;
3194: $courseid=~s/^\///;
3195: $courseid=~s/\_/\//g;
3196: my ($cdomain,$cnum)=split(/\//,$courseid);
3197: my $chome=homeserver($cnum,$cdomain);
3198: if (($chome eq '') || ($chome eq 'no_host')) {
3199: return 'error: no such course';
3200: }
3201: my $cstring='';
1.191 harris41 3202: foreach (keys %prefs) {
1.84 www 3203: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1.191 harris41 3204: }
1.84 www 3205: $cstring=~s/\&$//;
3206: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3207: }
3208:
3209: # ---------------------------------------------------------- Make/modify course
3210:
3211: sub createcourse {
1.271 www 3212: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
1.84 www 3213: $url=&declutter($url);
3214: my $cid='';
1.264 matthew 3215: unless (&allowed('ccc',$udom)) {
1.84 www 3216: return 'refused';
3217: }
3218: # ------------------------------------------------------------------- Create ID
3219: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3220: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3221: # ----------------------------------------------- Make sure that does not exist
1.230 stredwic 3222: my $uhome=&homeserver($uname,$udom,'true');
1.84 www 3223: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3224: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3225: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1.230 stredwic 3226: $uhome=&homeserver($uname,$udom,'true');
1.84 www 3227: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3228: return 'error: unable to generate unique course-ID';
3229: }
3230: }
1.264 matthew 3231: # ------------------------------------------------ Check supplied server name
3232: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3233: if (! exists($libserv{$course_server})) {
3234: return 'error:bad server name '.$course_server;
3235: }
1.84 www 3236: # ------------------------------------------------------------- Make the course
3237: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1.264 matthew 3238: $course_server);
1.84 www 3239: unless ($reply eq 'ok') { return 'error: '.$reply; }
1.230 stredwic 3240: $uhome=&homeserver($uname,$udom,'true');
1.84 www 3241: if (($uhome eq '') || ($uhome eq 'no_host')) {
3242: return 'error: no such course';
3243: }
1.271 www 3244: # ----------------------------------------------------------------- Course made
1.358 www 3245: # log existance
3246: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description),
3247: $uhome);
3248: &flushcourselogs();
3249: # set toplevel url
1.271 www 3250: my $topurl=$url;
3251: unless ($nonstandard) {
3252: # ------------------------------------------ For standard courses, make top url
3253: my $mapurl=&clutter($url);
1.278 www 3254: if ($mapurl eq '/res/') { $mapurl=''; }
1.271 www 3255: $ENV{'form.initmap'}=(<<ENDINITMAP);
3256: <map>
3257: <resource id="1" type="start"></resource>
3258: <resource id="2" src="$mapurl"></resource>
3259: <resource id="3" type="finish"></resource>
3260: <link index="1" from="1" to="2"></link>
3261: <link index="2" from="2" to="3"></link>
3262: </map>
3263: ENDINITMAP
3264: $topurl=&declutter(
3265: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3266: );
3267: }
3268: # ----------------------------------------------------------- Write preferences
1.84 www 3269: &writecoursepref($udom.'_'.$uname,
3270: ('description' => $description,
1.271 www 3271: 'url' => $topurl));
1.84 www 3272: return '/'.$udom.'/'.$uname;
3273: }
3274:
1.21 www 3275: # ---------------------------------------------------------- Assign Custom Role
3276:
3277: sub assigncustomrole {
1.357 www 3278: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
1.21 www 3279: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1.357 www 3280: $end,$start,$deleteflag);
1.21 www 3281: }
3282:
3283: # ----------------------------------------------------------------- Revoke Role
3284:
3285: sub revokerole {
1.357 www 3286: my ($udom,$uname,$url,$role,$deleteflag)=@_;
1.21 www 3287: my $now=time;
1.357 www 3288: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
1.21 www 3289: }
3290:
3291: # ---------------------------------------------------------- Revoke Custom Role
3292:
3293: sub revokecustomrole {
1.357 www 3294: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
1.21 www 3295: my $now=time;
1.357 www 3296: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3297: $deleteflag);
1.17 www 3298: }
3299:
3300: # ------------------------------------------------------------ Directory lister
3301:
3302: sub dirlist {
1.253 stredwic 3303: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3304:
1.18 www 3305: $uri=~s/^\///;
3306: $uri=~s/\/$//;
1.253 stredwic 3307: my ($udom, $uname);
3308: (undef,$udom,$uname)=split(/\//,$uri);
3309: if(defined($userdomain)) {
3310: $udom = $userdomain;
3311: }
3312: if(defined($username)) {
3313: $uname = $username;
3314: }
3315:
3316: my $dirRoot = $perlvar{'lonDocRoot'};
3317: if(defined($alternateDirectoryRoot)) {
3318: $dirRoot = $alternateDirectoryRoot;
3319: $dirRoot =~ s/\/$//;
3320: }
3321:
3322: if($udom) {
3323: if($uname) {
3324: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
3325: homeserver($uname,$udom));
3326: return split(/:/,$listing);
3327: } elsif(!defined($alternateDirectoryRoot)) {
3328: my $tryserver;
3329: my %allusers=();
3330: foreach $tryserver (keys %libserv) {
3331: if($hostdom{$tryserver} eq $udom) {
3332: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3333: $udom, $tryserver);
3334: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
3335: && ($listing ne 'con_lost')) {
3336: foreach (split(/:/,$listing)) {
3337: my ($entry,@stat)=split(/&/,$_);
3338: $allusers{$entry}=1;
3339: }
3340: }
1.191 harris41 3341: }
1.253 stredwic 3342: }
3343: my $alluserstr='';
3344: foreach (sort keys %allusers) {
3345: $alluserstr.=$_.'&user:';
3346: }
3347: $alluserstr=~s/:$//;
3348: return split(/:/,$alluserstr);
3349: } else {
3350: my @emptyResults = ();
3351: push(@emptyResults, 'missing user name');
3352: return split(':',@emptyResults);
3353: }
3354: } elsif(!defined($alternateDirectoryRoot)) {
3355: my $tryserver;
3356: my %alldom=();
3357: foreach $tryserver (keys %libserv) {
3358: $alldom{$hostdom{$tryserver}}=1;
3359: }
3360: my $alldomstr='';
3361: foreach (sort keys %alldom) {
1.397 albertel 3362: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
1.253 stredwic 3363: }
3364: $alldomstr=~s/:$//;
3365: return split(/:/,$alldomstr);
3366: } else {
3367: my @emptyResults = ();
3368: push(@emptyResults, 'missing domain');
3369: return split(':',@emptyResults);
1.275 stredwic 3370: }
3371: }
3372:
3373: # --------------------------------------------- GetFileTimestamp
3374: # This function utilizes dirlist and returns the date stamp for
3375: # when it was last modified. It will also return an error of -1
3376: # if an error occurs
3377:
1.410 matthew 3378: ##
3379: ## FIXME: This subroutine assumes its caller knows something about the
3380: ## directory structure of the home server for the student ($root).
3381: ## Not a good assumption to make. Since this is for looking up files
3382: ## in user directories, the full path should be constructed by lond, not
3383: ## whatever machine we request data from.
3384: ##
1.275 stredwic 3385: sub GetFileTimestamp {
3386: my ($studentDomain,$studentName,$filename,$root)=@_;
3387: $studentDomain=~s/\W//g;
3388: $studentName=~s/\W//g;
3389: my $subdir=$studentName.'__';
3390: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3391: my $proname="$studentDomain/$subdir/$studentName";
3392: $proname .= '/'.$filename;
1.375 matthew 3393: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
3394: $studentName, $root);
1.275 stredwic 3395: my @stats = split('&', $fileStat);
3396: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
1.375 matthew 3397: # @stats contains first the filename, then the stat output
3398: return $stats[10]; # so this is 10 instead of 9.
1.275 stredwic 3399: } else {
3400: return -1;
1.253 stredwic 3401: }
1.26 www 3402: }
3403:
3404: # -------------------------------------------------------- Value of a Condition
3405:
1.40 www 3406: sub directcondval {
3407: my $number=shift;
3408: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
3409: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
3410: } else {
3411: return 2;
3412: }
3413: }
3414:
1.26 www 3415: sub condval {
3416: my $condidx=shift;
3417: my $result=0;
1.54 www 3418: my $allpathcond='';
1.191 harris41 3419: foreach (split(/\|/,$condidx)) {
1.54 www 3420: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
3421: $allpathcond.=
3422: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
3423: }
1.191 harris41 3424: }
1.54 www 3425: $allpathcond=~s/\|$//;
1.33 www 3426: if ($ENV{'request.course.id'}) {
1.54 www 3427: if ($allpathcond) {
1.26 www 3428: my $operand='|';
3429: my @stack;
1.191 harris41 3430: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
1.26 www 3431: if ($_ eq '(') {
3432: push @stack,($operand,$result)
3433: } elsif ($_ eq ')') {
3434: my $before=pop @stack;
3435: if (pop @stack eq '&') {
3436: $result=$result>$before?$before:$result;
3437: } else {
3438: $result=$result>$before?$result:$before;
3439: }
3440: } elsif (($_ eq '&') || ($_ eq '|')) {
3441: $operand=$_;
3442: } else {
1.40 www 3443: my $new=directcondval($_);
1.26 www 3444: if ($operand eq '&') {
3445: $result=$result>$new?$new:$result;
3446: } else {
3447: $result=$result>$new?$result:$new;
1.191 harris41 3448: }
1.26 www 3449: }
1.191 harris41 3450: }
1.26 www 3451: }
3452: }
3453: return $result;
1.421 albertel 3454: }
3455:
3456: # ---------------------------------------------------- Devalidate courseresdata
3457:
3458: sub devalidatecourseresdata {
3459: my ($coursenum,$coursedomain)=@_;
3460: my $hashid=$coursenum.':'.$coursedomain;
1.428 albertel 3461: &devalidate_cache(\%courseresdatacache,$hashid,'courseres');
1.28 www 3462: }
3463:
1.200 www 3464: # --------------------------------------------------- Course Resourcedata Query
3465:
3466: sub courseresdata {
3467: my ($coursenum,$coursedomain,@which)=@_;
3468: my $coursehom=&homeserver($coursenum,$coursedomain);
3469: my $hashid=$coursenum.':'.$coursedomain;
1.425 albertel 3470: my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid,'courseres');
1.417 albertel 3471: unless (defined($cached)) {
1.251 albertel 3472: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
1.417 albertel 3473: $result=\%dumpreply;
1.251 albertel 3474: my ($tmp) = keys(%dumpreply);
3475: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
1.425 albertel 3476: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
1.306 albertel 3477: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3478: return $tmp;
1.416 albertel 3479: } elsif ($tmp =~ /^(error)/) {
1.417 albertel 3480: $result=undef;
1.425 albertel 3481: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
1.250 albertel 3482: }
3483: }
1.251 albertel 3484: foreach my $item (@which) {
1.417 albertel 3485: if (defined($result->{$item})) {
3486: return $result->{$item};
1.251 albertel 3487: }
1.250 albertel 3488: }
1.291 albertel 3489: return undef;
1.200 www 3490: }
3491:
1.379 matthew 3492: #
3493: # EXT resource caching routines
3494: #
3495:
3496: sub clear_EXT_cache_status {
1.383 albertel 3497: &delenv('cache.EXT.');
1.379 matthew 3498: }
3499:
3500: sub EXT_cache_status {
3501: my ($target_domain,$target_user) = @_;
1.383 albertel 3502: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
1.389 www 3503: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
1.379 matthew 3504: # We know already the user has no data
3505: return 1;
3506: } else {
3507: return 0;
3508: }
3509: }
3510:
3511: sub EXT_cache_set {
3512: my ($target_domain,$target_user) = @_;
1.383 albertel 3513: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
1.379 matthew 3514: &appenv($cachename => time);
3515: }
3516:
1.28 www 3517: # --------------------------------------------------------- Value of a Variable
1.58 www 3518: sub EXT {
1.395 albertel 3519: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
1.218 albertel 3520:
1.68 www 3521: unless ($varname) { return ''; }
1.218 albertel 3522: #get real user name/domain, courseid and symb
3523: my $courseid;
1.359 albertel 3524: my $publicuser;
1.427 www 3525: if ($symbparm) {
3526: $symbparm=&get_symb_from_alias($symbparm);
3527: }
1.218 albertel 3528: if (!($uname && $udom)) {
1.360 albertel 3529: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
1.378 matthew 3530: &Apache::lonxml::whichuser($symbparm);
1.218 albertel 3531: if (!$symbparm) { $symbparm=$cursymb; }
3532: } else {
3533: $courseid=$ENV{'request.course.id'};
3534: }
1.48 www 3535: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
3536: my $rest;
1.320 albertel 3537: if (defined($therest[0])) {
1.48 www 3538: $rest=join('.',@therest);
3539: } else {
3540: $rest='';
3541: }
1.320 albertel 3542:
1.57 www 3543: my $qualifierrest=$qualifier;
3544: if ($rest) { $qualifierrest.='.'.$rest; }
3545: my $spacequalifierrest=$space;
3546: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1.28 www 3547: if ($realm eq 'user') {
1.48 www 3548: # --------------------------------------------------------------- user.resource
3549: if ($space eq 'resource') {
1.335 albertel 3550: if (defined($Apache::lonhomework::parsing_a_problem)) {
3551: return $Apache::lonhomework::history{$qualifierrest};
3552: } else {
1.359 albertel 3553: my %restored;
3554: if ($publicuser || $ENV{'request.state'} eq 'construct') {
3555: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
3556: } else {
3557: %restored=&restore($symbparm,$courseid,$udom,$uname);
3558: }
1.335 albertel 3559: return $restored{$qualifierrest};
3560: }
1.48 www 3561: # ----------------------------------------------------------------- user.access
3562: } elsif ($space eq 'access') {
1.218 albertel 3563: # FIXME - not supporting calls for a specific user
1.48 www 3564: return &allowed($qualifier,$rest);
3565: # ------------------------------------------ user.preferences, user.environment
3566: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1.218 albertel 3567: if (($uname eq $ENV{'user.name'}) &&
3568: ($udom eq $ENV{'user.domain'})) {
3569: return $ENV{join('.',('environment',$qualifierrest))};
3570: } else {
1.359 albertel 3571: my %returnhash;
3572: if (!$publicuser) {
3573: %returnhash=&userenvironment($udom,$uname,
3574: $qualifierrest);
3575: }
1.218 albertel 3576: return $returnhash{$qualifierrest};
3577: }
1.48 www 3578: # ----------------------------------------------------------------- user.course
3579: } elsif ($space eq 'course') {
1.218 albertel 3580: # FIXME - not supporting calls for a specific user
1.48 www 3581: return $ENV{join('.',('request.course',$qualifier))};
3582: # ------------------------------------------------------------------- user.role
3583: } elsif ($space eq 'role') {
1.218 albertel 3584: # FIXME - not supporting calls for a specific user
1.48 www 3585: my ($role,$where)=split(/\./,$ENV{'request.role'});
3586: if ($qualifier eq 'value') {
3587: return $role;
3588: } elsif ($qualifier eq 'extent') {
3589: return $where;
3590: }
3591: # ----------------------------------------------------------------- user.domain
3592: } elsif ($space eq 'domain') {
1.218 albertel 3593: return $udom;
1.48 www 3594: # ------------------------------------------------------------------- user.name
3595: } elsif ($space eq 'name') {
1.218 albertel 3596: return $uname;
1.48 www 3597: # ---------------------------------------------------- Any other user namespace
1.29 www 3598: } else {
1.359 albertel 3599: my %reply;
3600: if (!$publicuser) {
3601: %reply=&get($space,[$qualifierrest],$udom,$uname);
3602: }
3603: return $reply{$qualifierrest};
1.48 www 3604: }
1.236 www 3605: } elsif ($realm eq 'query') {
3606: # ---------------------------------------------- pull stuff out of query string
1.384 albertel 3607: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
3608: [$spacequalifierrest]);
1.376 albertel 3609: return $ENV{'form.'.$spacequalifierrest};
1.236 www 3610: } elsif ($realm eq 'request') {
1.48 www 3611: # ------------------------------------------------------------- request.browser
3612: if ($space eq 'browser') {
3613: return $ENV{'browser.'.$qualifier};
1.57 www 3614: # ------------------------------------------------------------ request.filename
3615: } else {
3616: return $ENV{'request.'.$spacequalifierrest};
1.29 www 3617: }
1.28 www 3618: } elsif ($realm eq 'course') {
1.48 www 3619: # ---------------------------------------------------------- course.description
1.218 albertel 3620: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
1.57 www 3621: } elsif ($realm eq 'resource') {
1.165 www 3622:
1.395 albertel 3623: my $section;
1.359 albertel 3624: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
1.165 www 3625:
1.218 albertel 3626: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
1.165 www 3627:
1.60 www 3628: # ----------------------------------------------------- Cascading lookup scheme
1.218 albertel 3629: if (!$symbparm) { $symbparm=&symbread(); }
3630: my $symbp=$symbparm;
1.409 www 3631: my $mapp=(&decode_symb($symbp))[0];
1.218 albertel 3632:
3633: my $symbparm=$symbp.'.'.$spacequalifierrest;
3634: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3635:
3636: if (($ENV{'user.name'} eq $uname) &&
3637: ($ENV{'user.domain'} eq $udom)) {
1.255 albertel 3638: $section=$ENV{'request.course.sec'};
1.218 albertel 3639: } else {
1.377 matthew 3640: if (! defined($usection)) {
3641: $section=&usection($udom,$uname,$courseid);
3642: } else {
3643: $section = $usection;
3644: }
1.218 albertel 3645: }
3646:
3647: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3648: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3649: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3650:
3651: my $courselevel=$courseid.'.'.$spacequalifierrest;
3652: my $courselevelr=$courseid.'.'.$symbparm;
3653: my $courselevelm=$courseid.'.'.$mapparm;
1.69 www 3654:
1.60 www 3655: # ----------------------------------------------------------- first, check user
1.379 matthew 3656: #most student don\'t have any data set, check if there is some data
3657: if (! &EXT_cache_status($udom,$uname)) {
1.420 albertel 3658: my $hashid="$udom:$uname";
1.425 albertel 3659: my ($result,$cached)=&is_cached(\%userresdatacache,$hashid,
3660: 'userres');
1.420 albertel 3661: if (!defined($cached)) {
3662: my %resourcedata=&get('resourcedata',
3663: [$courselevelr,$courselevelm,
3664: $courselevel],$udom,$uname);
3665: $result=\%resourcedata;
1.425 albertel 3666: &do_cache(\%userresdatacache,$hashid,$result,'userres');
1.420 albertel 3667: }
3668: my ($tmp)=keys(%$result);
1.308 albertel 3669: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
1.420 albertel 3670: if ($$result{$courselevelr}) {
3671: return $$result{$courselevelr}; }
3672: if ($$result{$courselevelm}) {
3673: return $$result{$courselevelm}; }
3674: if ($$result{$courselevel}) {
3675: return $$result{$courselevel}; }
1.308 albertel 3676: } else {
3677: if ($tmp!~/No such file/) {
3678: &logthis("<font color=blue>WARNING:".
3679: " Trying to get resource data for ".
3680: $uname." at ".$udom.": ".
3681: $tmp."</font>");
3682: } elsif ($tmp=~/error:No such file/) {
1.379 matthew 3683: &EXT_cache_set($udom,$uname);
1.308 albertel 3684: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3685: return $tmp;
3686: }
1.218 albertel 3687: }
3688: }
1.95 www 3689:
1.60 www 3690: # -------------------------------------------------------- second, check course
1.96 www 3691:
1.218 albertel 3692: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3693: $ENV{'course.'.$courseid.'.domain'},
3694: ($seclevelr,$seclevelm,$seclevel,
3695: $courselevelr,$courselevelm,
3696: $courselevel));
1.287 albertel 3697: if (defined($coursereply)) { return $coursereply; }
1.200 www 3698:
1.60 www 3699: # ------------------------------------------------------ third, check map parms
1.218 albertel 3700: my %parmhash=();
3701: my $thisparm='';
3702: if (tie(%parmhash,'GDBM_File',
3703: $ENV{'request.course.fn'}.'_parms.db',
1.256 albertel 3704: &GDBM_READER(),0640)) {
1.218 albertel 3705: $thisparm=$parmhash{$symbparm};
3706: untie(%parmhash);
3707: }
3708: if ($thisparm) { return $thisparm; }
3709: }
1.60 www 3710: # --------------------------------------------- last, look in resource metadata
1.71 www 3711:
1.218 albertel 3712: $spacequalifierrest=~s/\./\_/;
1.282 albertel 3713: my $filename;
3714: if (!$symbparm) { $symbparm=&symbread(); }
3715: if ($symbparm) {
1.409 www 3716: $filename=(&decode_symb($symbparm))[2];
1.282 albertel 3717: } else {
3718: $filename=$ENV{'request.filename'};
3719: }
3720: my $metadata=&metadata($filename,$spacequalifierrest);
1.288 albertel 3721: if (defined($metadata)) { return $metadata; }
1.282 albertel 3722: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
1.288 albertel 3723: if (defined($metadata)) { return $metadata; }
1.142 www 3724:
1.145 www 3725: # ------------------------------------------------------------------ Cascade up
1.218 albertel 3726: unless ($space eq '0') {
1.336 albertel 3727: my @parts=split(/_/,$space);
3728: my $id=pop(@parts);
3729: my $part=join('_',@parts);
3730: if ($part eq '') { $part='0'; }
3731: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
1.395 albertel 3732: $symbparm,$udom,$uname,$section,1);
1.337 albertel 3733: if (defined($partgeneral)) { return $partgeneral; }
1.218 albertel 3734: }
1.395 albertel 3735: if ($recurse) { return undef; }
3736: my $pack_def=&packages_tab_default($filename,$varname);
3737: if (defined($pack_def)) { return $pack_def; }
1.71 www 3738:
1.48 www 3739: # ---------------------------------------------------- Any other user namespace
3740: } elsif ($realm eq 'environment') {
3741: # ----------------------------------------------------------------- environment
1.219 albertel 3742: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3743: return $ENV{'environment.'.$spacequalifierrest};
3744: } else {
3745: my %returnhash=&userenvironment($udom,$uname,
3746: $spacequalifierrest);
3747: return $returnhash{$spacequalifierrest};
3748: }
1.28 www 3749: } elsif ($realm eq 'system') {
1.48 www 3750: # ----------------------------------------------------------------- system.time
3751: if ($space eq 'time') {
3752: return time;
3753: }
1.28 www 3754: }
1.48 www 3755: return '';
1.61 www 3756: }
3757:
1.395 albertel 3758: sub packages_tab_default {
3759: my ($uri,$varname)=@_;
3760: my (undef,$part,$name)=split(/\./,$varname);
3761: my $packages=&metadata($uri,'packages');
3762: foreach my $package (split(/,/,$packages)) {
3763: my ($pack_type,$pack_part)=split(/_/,$package,2);
3764: if ($pack_part eq $part) {
3765: return $packagetab{"$pack_type&$name&default"};
3766: }
3767: }
3768: return undef;
3769: }
3770:
1.334 albertel 3771: sub add_prefix_and_part {
3772: my ($prefix,$part)=@_;
3773: my $keyroot;
3774: if (defined($prefix) && $prefix !~ /^__/) {
3775: # prefix that has a part already
3776: $keyroot=$prefix;
3777: } elsif (defined($prefix)) {
3778: # prefix that is missing a part
3779: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3780: } else {
3781: # no prefix at all
3782: if (defined($part)) { $keyroot='_'.$part; }
3783: }
3784: return $keyroot;
3785: }
3786:
1.71 www 3787: # ---------------------------------------------------------------- Get metadata
3788:
3789: sub metadata {
1.176 www 3790: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
1.71 www 3791: $uri=&declutter($uri);
1.288 albertel 3792: # if it is a non metadata possible uri return quickly
1.293 matthew 3793: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
1.423 albertel 3794: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
3795: ($uri =~ m|home/[^/]+/public_html/|)) {
1.288 albertel 3796: return '';
3797: }
1.73 www 3798: my $filename=$uri;
3799: $uri=~s/\.meta$//;
1.172 www 3800: #
3801: # Is the metadata already cached?
1.177 www 3802: # Look at timestamp of caching
1.172 www 3803: # Everything is cached by the main uri, libraries are never directly cached
3804: #
1.428 albertel 3805: if (!defined($liburi)) {
3806: my ($result,$cached)=&is_cached(\%metacache,$uri,'meta');
3807: if (defined($cached)) { return $result->{':'.$what}; }
3808: }
3809: {
1.172 www 3810: #
3811: # Is this a recursive call for a library?
3812: #
1.428 albertel 3813: my %lcmetacache;
1.171 www 3814: if ($liburi) {
3815: $liburi=&declutter($liburi);
3816: $filename=$liburi;
1.401 bowersj2 3817: } else {
1.428 albertel 3818: &devalidate_cache(\%metacache,$uri,'meta');
1.401 bowersj2 3819: }
1.140 www 3820: my %metathesekeys=();
1.73 www 3821: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
1.335 albertel 3822: my $metastring=&getfile(&filelocation('',&clutter($filename)));
1.208 albertel 3823: my $parser=HTML::LCParser->new(\$metastring);
1.71 www 3824: my $token;
1.140 www 3825: undef %metathesekeys;
1.71 www 3826: while ($token=$parser->get_token) {
1.339 albertel 3827: if ($token->[0] eq 'S') {
3828: if (defined($token->[2]->{'package'})) {
1.172 www 3829: #
3830: # This is a package - get package info
3831: #
1.339 albertel 3832: my $package=$token->[2]->{'package'};
3833: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3834: if (defined($token->[2]->{'id'})) {
3835: $keyroot.='_'.$token->[2]->{'id'};
3836: }
1.428 albertel 3837: if ($lcmetacache{':packages'}) {
3838: $lcmetacache{':packages'}.=','.$package.$keyroot;
1.339 albertel 3839: } else {
1.428 albertel 3840: $lcmetacache{':packages'}=$package.$keyroot;
1.339 albertel 3841: }
3842: foreach (keys %packagetab) {
3843: if ($_=~/^$package\&/) {
3844: my ($pack,$name,$subp)=split(/\&/,$_);
1.395 albertel 3845: # ignore package.tab specified default values
3846: # here &package_tab_default() will fetch those
3847: if ($subp eq 'default') { next; }
1.339 albertel 3848: my $value=$packagetab{$_};
3849: my $part=$keyroot;
3850: $part=~s/^\_//;
3851: if ($subp eq 'display') {
3852: $value.=' [Part: '.$part.']';
3853: }
3854: my $unikey='parameter'.$keyroot.'_'.$name;
1.428 albertel 3855: $lcmetacache{':'.$unikey.'.part'}=$part;
1.395 albertel 3856: $metathesekeys{$unikey}=1;
1.428 albertel 3857: unless (defined($lcmetacache{':'.$unikey.'.'.$subp})) {
3858: $lcmetacache{':'.$unikey.'.'.$subp}=$value;
1.339 albertel 3859: }
1.428 albertel 3860: if (defined($lcmetacache{':'.$unikey.'.default'})) {
3861: $lcmetacache{':'.$unikey}=
3862: $lcmetacache{':'.$unikey.'.default'};
1.356 albertel 3863: }
1.339 albertel 3864: }
3865: }
3866: } else {
1.172 www 3867: #
3868: # This is not a package - some other kind of start tag
1.339 albertel 3869: #
3870: my $entry=$token->[1];
3871: my $unikey;
3872: if ($entry eq 'import') {
3873: $unikey='';
3874: } else {
3875: $unikey=$entry;
3876: }
3877: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3878:
3879: if (defined($token->[2]->{'id'})) {
3880: $unikey.='_'.$token->[2]->{'id'};
3881: }
1.175 www 3882:
1.339 albertel 3883: if ($entry eq 'import') {
1.175 www 3884: #
3885: # Importing a library here
1.339 albertel 3886: #
3887: if ($depthcount<20) {
3888: my $location=$parser->get_text('/import');
3889: my $dir=$filename;
3890: $dir=~s|[^/]*$||;
3891: $location=&filelocation($dir,$location);
3892: foreach (sort(split(/\,/,&metadata($uri,'keys',
3893: $location,$unikey,
3894: $depthcount+1)))) {
3895: $metathesekeys{$_}=1;
3896: }
3897: }
3898: } else {
3899:
3900: if (defined($token->[2]->{'name'})) {
3901: $unikey.='_'.$token->[2]->{'name'};
3902: }
3903: $metathesekeys{$unikey}=1;
3904: foreach (@{$token->[3]}) {
1.428 albertel 3905: $lcmetacache{':'.$unikey.'.'.$_}=$token->[2]->{$_};
1.339 albertel 3906: }
3907: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
1.428 albertel 3908: my $default=$lcmetacache{':'.$unikey.'.default'};
1.339 albertel 3909: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
3910: # only ws inside the tag, and not in default, so use default
3911: # as value
1.428 albertel 3912: $lcmetacache{':'.$unikey}=$default;
1.339 albertel 3913: } else {
1.321 albertel 3914: # either something interesting inside the tag or default
3915: # uninteresting
1.428 albertel 3916: $lcmetacache{':'.$unikey}=$internaltext;
1.339 albertel 3917: }
1.172 www 3918: # end of not-a-package not-a-library import
1.339 albertel 3919: }
1.172 www 3920: # end of not-a-package start tag
1.339 albertel 3921: }
1.172 www 3922: # the next is the end of "start tag"
1.339 albertel 3923: }
3924: }
1.338 www 3925: # are there custom rights to evaluate
1.428 albertel 3926: if ($lcmetacache{':copyright'} eq 'custom') {
1.339 albertel 3927:
1.338 www 3928: #
3929: # Importing a rights file here
1.339 albertel 3930: #
3931: unless ($depthcount) {
1.428 albertel 3932: my $location=$lcmetacache{':customdistributionfile'};
1.339 albertel 3933: my $dir=$filename;
3934: $dir=~s|[^/]*$||;
3935: $location=&filelocation($dir,$location);
3936: foreach (sort(split(/\,/,&metadata($uri,'keys',
3937: $location,'_rights',
3938: $depthcount+1)))) {
3939: $metathesekeys{$_}=1;
3940: }
3941: }
3942: }
1.428 albertel 3943: $lcmetacache{':keys'}=join(',',keys %metathesekeys);
3944: &metadata_generate_part0(\%metathesekeys,\%lcmetacache,$uri);
3945: $lcmetacache{':allpossiblekeys'}=join(',',keys %metathesekeys);
3946: &do_cache(\%metacache,$uri,\%lcmetacache,'meta');
1.177 www 3947: # this is the end of "was not already recently cached
1.71 www 3948: }
1.428 albertel 3949: return $metacache{$uri}->{':'.$what};
1.261 albertel 3950: }
3951:
3952: sub metadata_generate_part0 {
3953: my ($metadata,$metacache,$uri) = @_;
3954: my %allnames;
3955: foreach my $metakey (sort keys %$metadata) {
3956: if ($metakey=~/^parameter\_(.*)/) {
1.428 albertel 3957: my $part=$$metacache{':'.$metakey.'.part'};
3958: my $name=$$metacache{':'.$metakey.'.name'};
1.356 albertel 3959: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
1.261 albertel 3960: $allnames{$name}=$part;
3961: }
3962: }
3963: }
3964: foreach my $name (keys(%allnames)) {
3965: $$metadata{"parameter_0_$name"}=1;
1.428 albertel 3966: my $key=":parameter_0_$name";
1.261 albertel 3967: $$metacache{"$key.part"}='0';
3968: $$metacache{"$key.name"}=$name;
1.428 albertel 3969: $$metacache{"$key.type"}=$$metacache{':parameter_'.
1.261 albertel 3970: $allnames{$name}.'_'.$name.
3971: '.type'};
1.428 albertel 3972: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
1.261 albertel 3973: '.display'};
3974: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3975: $olddis=~s/$expr/\[Part: 0\]/;
3976: $$metacache{"$key.display"}=$olddis;
3977: }
1.71 www 3978: }
3979:
1.301 www 3980: # ------------------------------------------------- Get the title of a resource
3981:
3982: sub gettitle {
3983: my $urlsymb=shift;
3984: my $symb=&symbread($urlsymb);
3985: unless ($symb) {
3986: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3987: return &metadata($urlsymb,'title');
3988: }
1.425 albertel 3989: my ($result,$cached)=&is_cached(\%titlecache,$symb,'title',600);
1.419 albertel 3990: if (defined($cached)) { return $result; }
1.409 www 3991: my ($map,$resid,$url)=&decode_symb($symb);
1.301 www 3992: my $title='';
3993: my %bighash;
3994: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3995: &GDBM_READER(),0640)) {
3996: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3997: $title=$bighash{'title_'.$mapid.'.'.$resid};
3998: untie %bighash;
3999: }
1.363 www 4000: $title=~s/\&colon\;/\:/gs;
1.301 www 4001: if ($title) {
1.425 albertel 4002: return &do_cache(\%titlecache,$symb,$title,'title');
1.301 www 4003: } else {
4004: return &metadata($urlsymb,'title');
4005: }
4006: }
4007:
1.31 www 4008: # ------------------------------------------------- Update symbolic store links
4009:
4010: sub symblist {
4011: my ($mapname,%newhash)=@_;
4012: $mapname=declutter($mapname);
4013: my %hash;
4014: if (($ENV{'request.course.fn'}) && (%newhash)) {
4015: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1.256 albertel 4016: &GDBM_WRCREAT(),0640)) {
1.191 harris41 4017: foreach (keys %newhash) {
1.211 www 4018: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
1.191 harris41 4019: }
1.31 www 4020: if (untie(%hash)) {
4021: return 'ok';
4022: }
4023: }
4024: }
4025: return 'error';
1.212 www 4026: }
4027:
4028: # --------------------------------------------------------------- Verify a symb
4029:
4030: sub symbverify {
4031: my ($symb,$thisfn)=@_;
1.213 www 4032: $thisfn=&declutter($thisfn);
1.215 www 4033: # direct jump to resource in page or to a sequence - will construct own symbs
4034: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
4035: # check URL part
1.409 www 4036: my ($map,$resid,$url)=&decode_symb($symb);
1.213 www 4037: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
4038:
1.216 www 4039: $symb=&symbclean($symb);
1.213 www 4040:
4041: my %bighash;
4042: my $okay=0;
4043: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1.256 albertel 4044: &GDBM_READER(),0640)) {
1.280 www 4045: my $ids=$bighash{'ids_'.&clutter($thisfn)};
1.216 www 4046: unless ($ids) {
4047: $ids=$bighash{'ids_/'.$thisfn};
4048: }
4049: if ($ids) {
4050: # ------------------------------------------------------------------- Has ID(s)
4051: foreach (split(/\,/,$ids)) {
4052: my ($mapid,$resid)=split(/\./,$_);
4053: if (
4054: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
4055: eq $symb) {
4056: $okay=1;
4057: }
4058: }
4059: }
1.213 www 4060: untie(%bighash);
4061: }
4062: return $okay;
1.31 www 4063: }
4064:
1.210 www 4065: # --------------------------------------------------------------- Clean-up symb
4066:
4067: sub symbclean {
4068: my $symb=shift;
1.213 www 4069:
1.210 www 4070: # remove version from map
4071: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
1.215 www 4072:
1.210 www 4073: # remove version from URL
4074: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
1.213 www 4075:
1.210 www 4076: return $symb;
1.409 www 4077: }
4078:
4079: # ---------------------------------------------- Split symb to find map and url
1.429 ! albertel 4080:
! 4081: sub encode_symb {
! 4082: my ($map,$resid,$url)=@_;
! 4083: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
! 4084: }
1.409 www 4085:
4086: sub decode_symb {
1.413 www 4087: my ($map,$resid,$url)=split(/\_\_\_/,shift);
4088: return (&fixversion($map),$resid,&fixversion($url));
4089: }
4090:
4091: sub fixversion {
4092: my $fn=shift;
4093: if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
4094: my ($match,$cond,$versioned)=&is_on_map($fn);
4095: unless ($match) {
4096: $fn=$versioned;
4097: }
4098: return $fn;
1.210 www 4099: }
4100:
1.31 www 4101: # ------------------------------------------------------ Return symb list entry
4102:
4103: sub symbread {
1.249 www 4104: my ($thisfn,$donotrecurse)=@_;
1.242 www 4105: # no filename provided? try from environment
1.44 www 4106: unless ($thisfn) {
1.210 www 4107: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
1.44 www 4108: $thisfn=$ENV{'request.filename'};
4109: }
1.242 www 4110: # is that filename actually a symb? Verify, clean, and return
4111: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
4112: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
4113: }
1.44 www 4114: $thisfn=declutter($thisfn);
1.31 www 4115: my %hash;
1.37 www 4116: my %bighash;
4117: my $syval='';
1.45 www 4118: if (($ENV{'request.course.fn'}) && ($thisfn)) {
1.31 www 4119: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1.256 albertel 4120: &GDBM_READER(),0640)) {
1.31 www 4121: $syval=$hash{$thisfn};
1.37 www 4122: untie(%hash);
4123: }
4124: # ---------------------------------------------------------- There was an entry
4125: if ($syval) {
4126: unless ($syval=~/\_\d+$/) {
4127: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
1.44 www 4128: &appenv('request.ambiguous' => $thisfn);
1.37 www 4129: return '';
4130: }
4131: $syval.=$1;
4132: }
4133: } else {
4134: # ------------------------------------------------------- Was not in symb table
4135: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1.256 albertel 4136: &GDBM_READER(),0640)) {
1.37 www 4137: # ---------------------------------------------- Get ID(s) for current resource
1.280 www 4138: my $ids=$bighash{'ids_'.&clutter($thisfn)};
1.65 www 4139: unless ($ids) {
4140: $ids=$bighash{'ids_/'.$thisfn};
1.242 www 4141: }
4142: unless ($ids) {
4143: # alias?
4144: $ids=$bighash{'mapalias_'.$thisfn};
1.65 www 4145: }
1.37 www 4146: if ($ids) {
4147: # ------------------------------------------------------------------- Has ID(s)
4148: my @possibilities=split(/\,/,$ids);
1.39 www 4149: if ($#possibilities==0) {
4150: # ----------------------------------------------- There is only one possibility
1.37 www 4151: my ($mapid,$resid)=split(/\./,$ids);
4152: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
1.249 www 4153: } elsif (!$donotrecurse) {
1.39 www 4154: # ------------------------------------------ There is more than one possibility
4155: my $realpossible=0;
1.191 harris41 4156: foreach (@possibilities) {
1.39 www 4157: my $file=$bighash{'src_'.$_};
4158: if (&allowed('bre',$file)) {
4159: my ($mapid,$resid)=split(/\./,$_);
4160: if ($bighash{'map_type_'.$mapid} ne 'page') {
4161: $realpossible++;
4162: $syval=declutter($bighash{'map_id_'.$mapid}).
4163: '___'.$resid;
4164: }
4165: }
1.191 harris41 4166: }
1.39 www 4167: if ($realpossible!=1) { $syval=''; }
1.249 www 4168: } else {
4169: $syval='';
1.37 www 4170: }
4171: }
4172: untie(%bighash)
4173: }
1.31 www 4174: }
1.62 www 4175: if ($syval) {
1.210 www 4176: return &symbclean($syval.'___'.$thisfn);
1.62 www 4177: }
1.31 www 4178: }
1.44 www 4179: &appenv('request.ambiguous' => $thisfn);
1.31 www 4180: return '';
4181: }
4182:
4183: # ---------------------------------------------------------- Return random seed
4184:
1.32 www 4185: sub numval {
4186: my $txt=shift;
4187: $txt=~tr/A-J/0-9/;
4188: $txt=~tr/a-j/0-9/;
4189: $txt=~tr/K-T/0-9/;
4190: $txt=~tr/k-t/0-9/;
4191: $txt=~tr/U-Z/0-5/;
4192: $txt=~tr/u-z/0-5/;
4193: $txt=~s/\D//g;
4194: return int($txt);
1.368 albertel 4195: }
4196:
4197: sub latest_rnd_algorithm_id {
4198: return '64bit';
1.366 albertel 4199: }
1.32 www 4200:
1.31 www 4201: sub rndseed {
1.155 albertel 4202: my ($symb,$courseid,$domain,$username)=@_;
1.366 albertel 4203:
4204: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
1.155 albertel 4205: if (!$symb) {
1.366 albertel 4206: unless ($symb=$wsymb) { return time; }
4207: }
4208: if (!$courseid) { $courseid=$wcourseid; }
4209: if (!$domain) { $domain=$wdomain; }
4210: if (!$username) { $username=$wusername }
4211: my $which=$ENV{"course.$courseid.rndseed"};
4212: my $CODE=$ENV{'scantron.CODE'};
4213: if (defined($CODE)) {
4214: &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
4215: } elsif ($which eq '64bit') {
4216: return &rndseed_64bit($symb,$courseid,$domain,$username);
4217: }
4218: return &rndseed_32bit($symb,$courseid,$domain,$username);
4219: }
4220:
4221: sub rndseed_32bit {
4222: my ($symb,$courseid,$domain,$username)=@_;
4223: {
4224: use integer;
4225: my $symbchck=unpack("%32C*",$symb) << 27;
4226: my $symbseed=numval($symb) << 22;
4227: my $namechck=unpack("%32C*",$username) << 17;
4228: my $nameseed=numval($username) << 12;
4229: my $domainseed=unpack("%32C*",$domain) << 7;
4230: my $courseseed=unpack("%32C*",$courseid);
4231: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
4232: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4233: #&Apache::lonxml::debug("rndseed :$num:$symb");
4234: return $num;
4235: }
4236: }
4237:
4238: sub rndseed_64bit {
4239: my ($symb,$courseid,$domain,$username)=@_;
4240: {
4241: use integer;
4242: my $symbchck=unpack("%32S*",$symb) << 21;
4243: my $symbseed=numval($symb) << 10;
4244: my $namechck=unpack("%32S*",$username);
4245:
4246: my $nameseed=numval($username) << 21;
4247: my $domainseed=unpack("%32S*",$domain) << 10;
4248: my $courseseed=unpack("%32S*",$courseid);
4249:
4250: my $num1=$symbchck+$symbseed+$namechck;
4251: my $num2=$nameseed+$domainseed+$courseseed;
4252: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4253: #&Apache::lonxml::debug("rndseed :$num:$symb");
4254: return "$num1,$num2";
1.155 albertel 4255: }
1.366 albertel 4256: }
4257:
4258: sub rndseed_CODE_64bit {
4259: my ($symb,$courseid,$domain,$username)=@_;
1.155 albertel 4260: {
1.366 albertel 4261: use integer;
4262: my $symbchck=unpack("%32S*",$symb) << 16;
4263: my $symbseed=numval($symb);
4264: my $CODEseed=numval($ENV{'scantron.CODE'}) << 16;
4265: my $courseseed=unpack("%32S*",$courseid);
4266: my $num1=$symbseed+$CODEseed;
4267: my $num2=$courseseed+$symbchck;
4268: #&Apache::lonxml::debug("$symbseed:$CODEseed|$courseseed:$symbchck");
4269: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
4270: return "$num1,$num2";
4271: }
4272: }
4273:
4274: sub setup_random_from_rndseed {
4275: my ($rndseed)=@_;
4276: if ($rndseed =~/,/) {
4277: my ($num1,$num2)=split(/,/,$rndseed);
4278: &Math::Random::random_set_seed(abs($num1),abs($num2));
4279: } else {
4280: &Math::Random::random_set_seed_from_phrase($rndseed);
1.98 albertel 4281: }
1.36 albertel 4282: }
4283:
1.76 www 4284: sub ireceipt {
4285: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
4286: my $cuname=unpack("%32C*",$funame);
4287: my $cudom=unpack("%32C*",$fudom);
4288: my $cucourseid=unpack("%32C*",$fucourseid);
4289: my $cusymb=unpack("%32C*",$fusymb);
1.77 www 4290: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
1.76 www 4291: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
4292: ($cunique%$cuname+
4293: $cunique%$cudom+
4294: $cusymb%$cuname+
4295: $cusymb%$cudom+
4296: $cucourseid%$cuname+
4297: $cucourseid%$cudom);
4298: }
4299:
4300: sub receipt {
1.260 ng 4301: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
4302: return &ireceipt($name,$domain,$courseid,$symb);
1.76 www 4303: }
1.260 ng 4304:
1.36 albertel 4305: # ------------------------------------------------------------ Serves up a file
4306: # returns either the contents of the file or a -1
4307: sub getfile {
1.269 www 4308: my $file=shift;
4309: if ($file=~/^\/*uploaded\//) { # user file
4310: my $ua=new LWP::UserAgent;
4311: my $request=new HTTP::Request('GET',&tokenwrapper($file));
4312: my $response=$ua->request($request);
4313: if ($response->is_success()) {
4314: return $response->content;
4315: } else {
4316: return -1;
4317: }
4318: } else { # normal file from res space
1.37 www 4319: &repcopy($file);
1.36 albertel 4320: if (! -e $file ) { return -1; };
4321: my $fh=Apache::File->new($file);
4322: my $a='';
4323: while (<$fh>) { $a .=$_; }
1.269 www 4324: return $a;
4325: }
1.36 albertel 4326: }
4327:
4328: sub filelocation {
4329: my ($dir,$file) = @_;
4330: my $location;
4331: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
1.59 albertel 4332: if ($file=~m:^/~:) { # is a contruction space reference
4333: $location = $file;
4334: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
1.270 www 4335: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
4336: $location=$file;
1.36 albertel 4337: } else {
1.59 albertel 4338: $file=~s/^$perlvar{'lonDocRoot'}//;
4339: $file=~s:^/*res::;
4340: if ( !( $file =~ m:^/:) ) {
4341: $location = $dir. '/'.$file;
4342: } else {
4343: $location = '/home/httpd/html/res'.$file;
4344: }
1.36 albertel 4345: }
4346: $location=~s://+:/:g; # remove duplicate /
1.46 www 4347: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
4348: return $location;
4349: }
1.36 albertel 4350:
1.46 www 4351: sub hreflocation {
4352: my ($dir,$file)=@_;
1.191 harris41 4353: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
1.46 www 4354: my $finalpath=filelocation($dir,$file);
4355: $finalpath=~s/^\/home\/httpd\/html//;
1.225 albertel 4356: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
1.46 www 4357: return $finalpath;
4358: } else {
4359: return $file;
4360: }
1.31 www 4361: }
4362:
4363: # ------------------------------------------------------------- Declutters URLs
4364:
4365: sub declutter {
4366: my $thisfn=shift;
4367: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
4368: $thisfn=~s/^\///;
4369: $thisfn=~s/^res\///;
1.235 www 4370: $thisfn=~s/\?.+$//;
1.268 www 4371: return $thisfn;
4372: }
4373:
4374: # ------------------------------------------------------------- Clutter up URLs
4375:
4376: sub clutter {
4377: my $thisfn='/'.&declutter(shift);
1.270 www 4378: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
4379: $thisfn='/res'.$thisfn;
4380: }
1.31 www 4381: return $thisfn;
1.12 www 4382: }
4383:
4384: # -------------------------------------------------------- Escape Special Chars
4385:
4386: sub escape {
4387: my $str=shift;
4388: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
4389: return $str;
4390: }
4391:
4392: # ----------------------------------------------------- Un-Escape Special Chars
4393:
4394: sub unescape {
4395: my $str=shift;
4396: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
4397: return $str;
4398: }
1.11 www 4399:
1.415 albertel 4400: sub mod_perl_version {
4401: if (defined($perlvar{'MODPERL2'})) {
4402: return 2;
4403: }
4404: return 1;
4405: }
1.1 albertel 4406: # ================================================================ Main Program
4407:
1.184 www 4408: sub goodbye {
1.204 albertel 4409: &logthis("Starting Shut down");
1.425 albertel 4410: #not converted to using infrastruture
4411: &logthis(sprintf("%-20s is %s",'%homecache',scalar(%homecache)));
4412: &logthis(sprintf("%-20s is %s",'%badServerCache',scalar(%badServerCache)));
4413: &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
4414: #converted
4415: &logthis(sprintf("%-20s is %s",'%titlecache',scalar(%titlecache)));
4416: &logthis(sprintf("%-20s is %s",'%courseresdatacache',scalar(%courseresdatacache)));
4417: #1.1 only
4418: &logthis(sprintf("%-20s is %s",'%userresdatacache',scalar(%userresdatacache)));
4419: &logthis(sprintf("%-20s is %s",'%usectioncache',scalar(%usectioncache)));
1.184 www 4420: &flushcourselogs();
4421: &logthis("Shutting down");
1.362 albertel 4422: return DONE;
1.184 www 4423: }
4424:
1.179 www 4425: BEGIN {
1.228 harris41 4426: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
1.195 www 4427: unless ($readit) {
1.217 harris41 4428: {
4429: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
4430:
4431: while (my $configline=<$config>) {
4432: if ($configline =~ /^[^\#]*PerlSetVar/) {
1.1 albertel 4433: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
1.8 www 4434: chomp($varvalue);
1.1 albertel 4435: $perlvar{$varname}=$varvalue;
4436: }
4437: }
4438: }
1.227 harris41 4439: {
4440: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
4441:
4442: while (my $configline=<$config>) {
4443: if ($configline =~ /^[^\#]*PerlSetVar/) {
4444: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
4445: chomp($varvalue);
4446: $perlvar{$varname}=$varvalue;
4447: }
4448: }
4449: }
1.1 albertel 4450:
1.327 albertel 4451: # ------------------------------------------------------------ Read domain file
4452: {
4453: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
4454: '/domain.tab');
4455: %domaindescription = ();
4456: %domain_auth_def = ();
4457: %domain_auth_arg_def = ();
4458: if ($fh) {
4459: while (<$fh>) {
1.390 matthew 4460: next if (/^(\#|\s*$)/);
4461: # next if /^\#/;
1.327 albertel 4462: chomp;
1.403 www 4463: my ($domain, $domain_description, $def_auth, $def_auth_arg,
4464: $def_lang, $city, $longi, $lati) = split(/:/,$_);
4465: $domain_auth_def{$domain}=$def_auth;
1.327 albertel 4466: $domain_auth_arg_def{$domain}=$def_auth_arg;
1.403 www 4467: $domaindescription{$domain}=$domain_description;
4468: $domain_lang_def{$domain}=$def_lang;
4469: $domain_city{$domain}=$city;
4470: $domain_longi{$domain}=$longi;
4471: $domain_lati{$domain}=$lati;
4472:
1.327 albertel 4473: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
4474: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
4475: }
4476: }
4477: }
4478:
4479:
1.1 albertel 4480: # ------------------------------------------------------------- Read hosts file
4481: {
4482: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
4483:
4484: while (my $configline=<$config>) {
1.303 matthew 4485: next if ($configline =~ /^(\#|\s*$)/);
1.154 www 4486: chomp($configline);
1.245 www 4487: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
1.252 albertel 4488: if ($id && $domain && $role && $name && $ip) {
4489: $hostname{$id}=$name;
4490: $hostdom{$id}=$domain;
4491: $hostip{$id}=$ip;
1.300 albertel 4492: $iphost{$ip}=$id;
1.252 albertel 4493: if ($role eq 'library') { $libserv{$id}=$name; }
4494: } else {
4495: if ($configline) {
4496: &logthis("Skipping hosts.tab line -$configline-");
4497: }
1.245 www 4498: }
1.1 albertel 4499: }
4500: }
4501:
4502: # ------------------------------------------------------ Read spare server file
4503: {
4504: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
4505:
4506: while (my $configline=<$config>) {
4507: chomp($configline);
1.284 matthew 4508: if ($configline) {
1.1 albertel 4509: $spareid{$configline}=1;
4510: }
4511: }
4512: }
1.11 www 4513: # ------------------------------------------------------------ Read permissions
4514: {
4515: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
4516:
4517: while (my $configline=<$config>) {
4518: chomp($configline);
1.160 www 4519: if ($configline) {
1.11 www 4520: my ($role,$perm)=split(/ /,$configline);
4521: if ($perm ne '') { $pr{$role}=$perm; }
1.160 www 4522: }
1.11 www 4523: }
4524: }
4525:
4526: # -------------------------------------------- Read plain texts for permissions
4527: {
4528: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
4529:
4530: while (my $configline=<$config>) {
4531: chomp($configline);
1.160 www 4532: if ($configline) {
1.11 www 4533: my ($short,$plain)=split(/:/,$configline);
4534: if ($plain ne '') { $prp{$short}=$plain; }
1.160 www 4535: }
1.135 www 4536: }
4537: }
4538:
4539: # ---------------------------------------------------------- Read package table
4540: {
4541: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
4542:
4543: while (my $configline=<$config>) {
4544: chomp($configline);
4545: my ($short,$plain)=split(/:/,$configline);
1.143 www 4546: my ($pack,$name)=split(/\&/,$short);
4547: if ($plain ne '') {
4548: $packagetab{$pack.'&'.$name.'&name'}=$name;
4549: $packagetab{$short}=$plain;
1.25 www 4550: }
1.11 www 4551: }
1.329 matthew 4552: }
4553:
4554: # ------------- set up temporary directory
4555: {
4556: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
4557:
1.11 www 4558: }
4559:
1.71 www 4560: %metacache=();
1.185 www 4561:
1.281 www 4562: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
1.186 www 4563: $dumpcount=0;
1.22 www 4564:
1.163 harris41 4565: &logtouch();
1.12 www 4566: &logthis('<font color=yellow>INFO: Read configuration</font>');
1.195 www 4567: $readit=1;
4568: }
1.1 albertel 4569: }
1.179 www 4570:
1.1 albertel 4571: 1;
1.191 harris41 4572: __END__
4573:
1.243 albertel 4574: =pod
4575:
1.191 harris41 4576: =head1 NAME
4577:
1.243 albertel 4578: Apache::lonnet - Subroutines to ask questions about things in the network.
1.191 harris41 4579:
4580: =head1 SYNOPSIS
4581:
1.243 albertel 4582: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
1.191 harris41 4583:
4584: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
4585:
1.243 albertel 4586: Common parameters:
4587:
4588: =over 4
4589:
4590: =item *
4591:
4592: $uname : an internal username (if $cname expecting a course Id specifically)
4593:
4594: =item *
4595:
4596: $udom : a domain (if $cdom expecting a course's domain specifically)
4597:
4598: =item *
4599:
4600: $symb : a resource instance identifier
4601:
4602: =item *
4603:
4604: $namespace : the name of a .db file that contains the data needed or
4605: being set.
4606:
4607: =back
4608:
1.394 bowersj2 4609: =head1 OVERVIEW
1.191 harris41 4610:
1.394 bowersj2 4611: lonnet provides subroutines which interact with the
4612: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
4613: about classes, users, and resources.
1.243 albertel 4614:
4615: For many of these objects you can also use this to store data about
4616: them or modify them in various ways.
1.191 harris41 4617:
1.394 bowersj2 4618: =head2 Symbs
1.191 harris41 4619:
1.394 bowersj2 4620: To identify a specific instance of a resource, LON-CAPA uses symbols
4621: or "symbs"X<symb>. These identifiers are built from the URL of the
4622: map, the resource number of the resource in the map, and the URL of
4623: the resource itself. The latter is somewhat redundant, but might help
4624: if maps change.
4625:
4626: An example is
4627:
4628: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
4629:
4630: The respective map entry is
4631:
4632: <resource id="19" src="/res/msu/korte/tests/part12.problem"
4633: title="Problem 2">
4634: </resource>
4635:
4636: Symbs are used by the random number generator, as well as to store and
4637: restore data specific to a certain instance of for example a problem.
4638:
4639: =head2 Storing And Retrieving Data
4640:
4641: X<store()>X<cstore()>X<restore()>Three of the most important functions
4642: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
4643: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
4644: is is the non-critical message twin of cstore. These functions are for
4645: handlers to store a perl hash to a user's permanent data space in an
4646: easy manner, and to retrieve it again on another call. It is expected
4647: that a handler would use this once at the beginning to retrieve data,
4648: and then again once at the end to send only the new data back.
4649:
4650: The data is stored in the user's data directory on the user's
4651: homeserver under the ID of the course.
4652:
4653: The hash that is returned by restore will have all of the previous
4654: value for all of the elements of the hash.
4655:
4656: Example:
4657:
4658: #creating a hash
4659: my %hash;
4660: $hash{'foo'}='bar';
4661:
4662: #storing it
4663: &Apache::lonnet::cstore(\%hash);
4664:
4665: #changing a value
4666: $hash{'foo'}='notbar';
4667:
4668: #adding a new value
4669: $hash{'bar'}='foo';
4670: &Apache::lonnet::cstore(\%hash);
4671:
4672: #retrieving the hash
4673: my %history=&Apache::lonnet::restore();
4674:
4675: #print the hash
4676: foreach my $key (sort(keys(%history))) {
4677: print("\%history{$key} = $history{$key}");
4678: }
4679:
4680: Will print out:
1.191 harris41 4681:
1.394 bowersj2 4682: %history{1:foo} = bar
4683: %history{1:keys} = foo:timestamp
4684: %history{1:timestamp} = 990455579
4685: %history{2:bar} = foo
4686: %history{2:foo} = notbar
4687: %history{2:keys} = foo:bar:timestamp
4688: %history{2:timestamp} = 990455580
4689: %history{bar} = foo
4690: %history{foo} = notbar
4691: %history{timestamp} = 990455580
4692: %history{version} = 2
4693:
4694: Note that the special hash entries C<keys>, C<version> and
4695: C<timestamp> were added to the hash. C<version> will be equal to the
4696: total number of versions of the data that have been stored. The
4697: C<timestamp> attribute will be the UNIX time the hash was
4698: stored. C<keys> is available in every historical section to list which
4699: keys were added or changed at a specific historical revision of a
4700: hash.
4701:
4702: B<Warning>: do not store the hash that restore returns directly. This
4703: will cause a mess since it will restore the historical keys as if the
4704: were new keys. I.E. 1:foo will become 1:1:foo etc.
1.191 harris41 4705:
1.394 bowersj2 4706: Calling convention:
1.191 harris41 4707:
1.394 bowersj2 4708: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
4709: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
1.191 harris41 4710:
1.394 bowersj2 4711: For more detailed information, see lonnet specific documentation.
1.191 harris41 4712:
1.394 bowersj2 4713: =head1 RETURN MESSAGES
1.191 harris41 4714:
1.394 bowersj2 4715: =over 4
1.191 harris41 4716:
1.394 bowersj2 4717: =item * B<con_lost>: unable to contact remote host
1.191 harris41 4718:
1.394 bowersj2 4719: =item * B<con_delayed>: unable to contact remote host, message will be delivered
4720: when the connection is brought back up
1.191 harris41 4721:
1.394 bowersj2 4722: =item * B<con_failed>: unable to contact remote host and unable to save message
4723: for later delivery
1.191 harris41 4724:
1.394 bowersj2 4725: =item * B<error:>: an error a occured, a description of the error follows the :
1.191 harris41 4726:
1.394 bowersj2 4727: =item * B<no_such_host>: unable to fund a host associated with the user/domain
1.243 albertel 4728: that was requested
1.191 harris41 4729:
1.243 albertel 4730: =back
1.191 harris41 4731:
1.243 albertel 4732: =head1 PUBLIC SUBROUTINES
1.191 harris41 4733:
1.243 albertel 4734: =head2 Session Environment Functions
1.191 harris41 4735:
1.243 albertel 4736: =over 4
1.191 harris41 4737:
1.394 bowersj2 4738: =item *
4739: X<appenv()>
4740: B<appenv(%hash)>: the value of %hash is written to
4741: the user envirnoment file, and will be restored for each access this
4742: user makes during this session, also modifies the %ENV for the current
4743: process
1.191 harris41 4744:
4745: =item *
1.394 bowersj2 4746: X<delenv()>
4747: B<delenv($regexp)>: removes all items from the session
4748: environment file that matches the regular expression in $regexp. The
4749: values are also delted from the current processes %ENV.
1.191 harris41 4750:
1.243 albertel 4751: =back
4752:
4753: =head2 User Information
1.191 harris41 4754:
1.243 albertel 4755: =over 4
1.191 harris41 4756:
4757: =item *
1.394 bowersj2 4758: X<queryauthenticate()>
4759: B<queryauthenticate($uname,$udom)>: try to determine user's current
1.191 harris41 4760: authentication scheme
4761:
4762: =item *
1.394 bowersj2 4763: X<authenticate()>
4764: B<authenticate($uname,$upass,$udom)>: try to
4765: authenticate user from domain's lib servers (first use the current
4766: one). C<$upass> should be the users password.
1.191 harris41 4767:
4768: =item *
1.394 bowersj2 4769: X<homeserver()>
4770: B<homeserver($uname,$udom)>: find the server which has
4771: the user's directory and files (there must be only one), this caches
4772: the answer, and also caches if there is a borken connection.
1.191 harris41 4773:
4774: =item *
1.394 bowersj2 4775: X<idget()>
4776: B<idget($udom,@ids)>: find the usernames behind a list of IDs
4777: (IDs are a unique resource in a domain, there must be only 1 ID per
4778: username, and only 1 username per ID in a specific domain) (returns
4779: hash: id=>name,id=>name)
1.191 harris41 4780:
4781: =item *
1.394 bowersj2 4782: X<idrget()>
4783: B<idrget($udom,@unames)>: find the IDs behind a list of
4784: usernames (returns hash: name=>id,name=>id)
1.191 harris41 4785:
4786: =item *
1.394 bowersj2 4787: X<idput()>
4788: B<idput($udom,%ids)>: store away a list of names and associated IDs
1.191 harris41 4789:
4790: =item *
1.394 bowersj2 4791: X<rolesinit()>
4792: B<rolesinit($udom,$username,$authhost)>: get user privileges
1.243 albertel 4793:
4794: =item *
1.394 bowersj2 4795: X<usection()>
4796: B<usection($udom,$uname,$cname)>: finds the section of student in the
1.243 albertel 4797: course $cname, return section name/number or '' for "not in course"
4798: and '-1' for "no section"
4799:
4800: =item *
1.394 bowersj2 4801: X<userenvironment()>
4802: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
1.243 albertel 4803: passed in @what from the requested user's environment, returns a hash
4804:
4805: =back
4806:
4807: =head2 User Roles
4808:
4809: =over 4
4810:
4811: =item *
4812:
4813: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
4814: actions
4815: F: full access
4816: U,I,K: authentication modes (cxx only)
4817: '': forbidden
4818: 1: user needs to choose course
4819: 2: browse allowed
4820:
4821: =item *
4822:
4823: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
4824: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
4825: and course level
4826:
4827: =item *
4828:
4829: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
4830: explanation of a user role term
4831:
4832: =back
4833:
4834: =head2 User Modification
4835:
4836: =over 4
4837:
4838: =item *
4839:
4840: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
4841: user for the level given by URL. Optional start and end dates (leave empty
4842: string or zero for "no date")
1.191 harris41 4843:
4844: =item *
4845:
1.243 albertel 4846: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
4847: change a users, password, possible return values are: ok,
4848: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
4849: refused
1.191 harris41 4850:
4851: =item *
4852:
1.243 albertel 4853: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
1.191 harris41 4854:
4855: =item *
4856:
1.243 albertel 4857: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
4858: modify user
1.191 harris41 4859:
4860: =item *
4861:
1.286 matthew 4862: modifystudent
4863:
4864: modify a students enrollment and identification information.
4865: The course id is resolved based on the current users environment.
4866: This means the envoking user must be a course coordinator or otherwise
4867: associated with a course.
4868:
1.297 matthew 4869: This call is essentially a wrapper for lonnet::modifyuser and
4870: lonnet::modify_student_enrollment
1.286 matthew 4871:
4872: Inputs:
4873:
4874: =over 4
4875:
4876: =item B<$udom> Students loncapa domain
4877:
4878: =item B<$uname> Students loncapa login name
4879:
4880: =item B<$uid> Students id/student number
4881:
4882: =item B<$umode> Students authentication mode
4883:
4884: =item B<$upass> Students password
4885:
4886: =item B<$first> Students first name
4887:
4888: =item B<$middle> Students middle name
4889:
4890: =item B<$last> Students last name
4891:
4892: =item B<$gene> Students generation
4893:
4894: =item B<$usec> Students section in course
4895:
4896: =item B<$end> Unix time of the roles expiration
4897:
4898: =item B<$start> Unix time of the roles start date
4899:
4900: =item B<$forceid> If defined, allow $uid to be changed
4901:
4902: =item B<$desiredhome> server to use as home server for student
4903:
4904: =back
1.297 matthew 4905:
4906: =item *
4907:
4908: modify_student_enrollment
4909:
4910: Change a students enrollment status in a class. The environment variable
4911: 'role.request.course' must be defined for this function to proceed.
4912:
4913: Inputs:
4914:
4915: =over 4
4916:
4917: =item $udom, students domain
4918:
4919: =item $uname, students name
4920:
4921: =item $uid, students user id
4922:
4923: =item $first, students first name
4924:
4925: =item $middle
4926:
4927: =item $last
4928:
4929: =item $gene
4930:
4931: =item $usec
4932:
4933: =item $end
4934:
4935: =item $start
4936:
4937: =back
4938:
1.191 harris41 4939:
4940: =item *
4941:
1.243 albertel 4942: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
4943: custom role; give a custom role to a user for the level given by URL. Specify
4944: name and domain of role author, and role name
1.191 harris41 4945:
4946: =item *
4947:
1.243 albertel 4948: revokerole($udom,$uname,$url,$role) : revoke a role for url
1.191 harris41 4949:
4950: =item *
4951:
1.243 albertel 4952: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
4953:
4954: =back
4955:
4956: =head2 Course Infomation
4957:
4958: =over 4
1.191 harris41 4959:
4960: =item *
4961:
1.243 albertel 4962: coursedescription($courseid) : course description
1.191 harris41 4963:
4964: =item *
4965:
1.243 albertel 4966: courseresdata($coursenum,$coursedomain,@which) : request for current
4967: parameter setting for a specific course, @what should be a list of
4968: parameters to ask about. This routine caches answers for 5 minutes.
4969:
4970: =back
4971:
4972: =head2 Course Modification
4973:
4974: =over 4
1.191 harris41 4975:
4976: =item *
4977:
1.243 albertel 4978: writecoursepref($courseid,%prefs) : write preferences (environment
4979: database) for a course
1.191 harris41 4980:
4981: =item *
4982:
1.243 albertel 4983: createcourse($udom,$description,$url) : make/modify course
4984:
4985: =back
4986:
4987: =head2 Resource Subroutines
4988:
4989: =over 4
1.191 harris41 4990:
4991: =item *
4992:
1.243 albertel 4993: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
1.191 harris41 4994:
4995: =item *
4996:
1.243 albertel 4997: repcopy($filename) : subscribes to the requested file, and attempts to
4998: replicate from the owning library server, Might return
4999: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
5000: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
5001: resource. Expects the local filesystem pathname
5002: (/home/httpd/html/res/....)
5003:
5004: =back
5005:
5006: =head2 Resource Information
5007:
5008: =over 4
1.191 harris41 5009:
5010: =item *
5011:
1.243 albertel 5012: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
5013: a vairety of different possible values, $varname should be a request
5014: string, and the other parameters can be used to specify who and what
5015: one is asking about.
5016:
5017: Possible values for $varname are environment.lastname (or other item
5018: from the envirnment hash), user.name (or someother aspect about the
5019: user), resource.0.maxtries (or some other part and parameter of a
5020: resource)
1.204 albertel 5021:
5022: =item *
5023:
1.243 albertel 5024: directcondval($number) : get current value of a condition; reads from a state
5025: string
1.204 albertel 5026:
5027: =item *
5028:
1.243 albertel 5029: condval($condidx) : value of condition index based on state
1.204 albertel 5030:
5031: =item *
5032:
1.243 albertel 5033: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
5034: resource's metadata, $what should be either a specific key, or either
5035: 'keys' (to get a list of possible keys) or 'packages' to get a list of
5036: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
5037:
5038: this function automatically caches all requests
1.191 harris41 5039:
5040: =item *
5041:
1.243 albertel 5042: metadata_query($query,$custom,$customshow) : make a metadata query against the
5043: network of library servers; returns file handle of where SQL and regex results
5044: will be stored for query
1.191 harris41 5045:
5046: =item *
5047:
1.243 albertel 5048: symbread($filename) : return symbolic list entry (filename argument optional);
5049: returns the data handle
1.191 harris41 5050:
5051: =item *
5052:
1.243 albertel 5053: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
5054: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
5055: failure, user must be in a course, as it assumes the existance of the
5056: course initi hash, and uses $ENV('request.course.id'}
5057:
1.191 harris41 5058:
5059: =item *
5060:
1.243 albertel 5061: symbclean($symb) : removes versions numbers from a symb, returns the
5062: cleaned symb
1.191 harris41 5063:
5064: =item *
5065:
1.243 albertel 5066: is_on_map($uri) : checks if the $uri is somewhere on the current
5067: course map, user must be in a course for it to work.
1.191 harris41 5068:
5069: =item *
5070:
1.243 albertel 5071: numval($salt) : return random seed value (addend for rndseed)
1.191 harris41 5072:
5073: =item *
5074:
1.243 albertel 5075: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
5076: a random seed, all arguments are optional, if they aren't sent it uses the
5077: environment to derive them. Note: if symb isn't sent and it can't get one
5078: from &symbread it will use the current time as its return value
1.191 harris41 5079:
5080: =item *
5081:
1.243 albertel 5082: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
5083: unfakeable, receipt
1.191 harris41 5084:
5085: =item *
5086:
1.243 albertel 5087: receipt() : API to ireceipt working off of ENV values; given out to users
1.191 harris41 5088:
5089: =item *
5090:
1.243 albertel 5091: countacc($url) : count the number of accesses to a given URL
1.191 harris41 5092:
5093: =item *
5094:
1.243 albertel 5095: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
1.191 harris41 5096:
5097: =item *
5098:
1.243 albertel 5099: checkin($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 $tcrsid)
1.191 harris41 5100:
5101: =item *
5102:
1.243 albertel 5103: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
1.191 harris41 5104:
5105: =item *
5106:
1.243 albertel 5107: devalidate($symb) : devalidate temporary spreadsheet calculations,
5108: forcing spreadsheet to reevaluate the resource scores next time.
5109:
5110: =back
5111:
5112: =head2 Storing/Retreiving Data
5113:
5114: =over 4
1.191 harris41 5115:
5116: =item *
5117:
1.243 albertel 5118: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
5119: for this url; hashref needs to be given and should be a \%hashname; the
5120: remaining args aren't required and if they aren't passed or are '' they will
5121: be derived from the ENV
1.191 harris41 5122:
5123: =item *
5124:
1.243 albertel 5125: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
5126: uses critical subroutine
1.191 harris41 5127:
5128: =item *
5129:
1.243 albertel 5130: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
5131: all args are optional
1.191 harris41 5132:
5133: =item *
5134:
1.243 albertel 5135: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
5136: works very similar to store/cstore, but all data is stored in a
5137: temporary location and can be reset using tmpreset, $storehash should
5138: be a hash reference, returns nothing on success
1.191 harris41 5139:
5140: =item *
5141:
1.243 albertel 5142: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
5143: similar to restore, but all data is stored in a temporary location and
5144: can be reset using tmpreset. Returns a hash of values on success,
5145: error string otherwise.
1.191 harris41 5146:
5147: =item *
5148:
1.243 albertel 5149: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
5150: deltes all keys for $symb form the temporary storage hash.
1.191 harris41 5151:
5152: =item *
5153:
1.243 albertel 5154: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5155: reference filled in from namesp ($udom and $uname are optional)
1.191 harris41 5156:
5157: =item *
5158:
1.243 albertel 5159: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
5160: namesp ($udom and $uname are optional)
1.191 harris41 5161:
5162: =item *
5163:
1.243 albertel 5164: dump($namespace,$udom,$uname,$regexp) :
5165: dumps the complete (or key matching regexp) namespace into a hash
5166: ($udom, $uname and $regexp are optional)
1.191 harris41 5167:
5168: =item *
5169:
1.243 albertel 5170: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
5171: ($udom and $uname are optional)
1.191 harris41 5172:
5173: =item *
5174:
1.243 albertel 5175: cput($namespace,$storehash,$udom,$uname) : critical put
5176: ($udom and $uname are optional)
1.191 harris41 5177:
5178: =item *
5179:
1.243 albertel 5180: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5181: reference filled in from namesp (encrypts the return communication)
5182: ($udom and $uname are optional)
1.191 harris41 5183:
5184: =item *
5185:
1.243 albertel 5186: log($udom,$name,$home,$message) : write to permanent log for user; use
5187: critical subroutine
5188:
5189: =back
5190:
5191: =head2 Network Status Functions
5192:
5193: =over 4
1.191 harris41 5194:
5195: =item *
5196:
5197: dirlist($uri) : return directory list based on URI
5198:
5199: =item *
5200:
1.243 albertel 5201: spareserver() : find server with least workload from spare.tab
5202:
5203: =back
5204:
5205: =head2 Apache Request
5206:
5207: =over 4
1.191 harris41 5208:
5209: =item *
5210:
1.243 albertel 5211: ssi($url,%hash) : server side include, does a complete request cycle on url to
5212: localhost, posts hash
5213:
5214: =back
5215:
5216: =head2 Data to String to Data
5217:
5218: =over 4
1.191 harris41 5219:
5220: =item *
5221:
1.243 albertel 5222: hash2str(%hash) : convert a hash into a string complete with escaping and '='
5223: and '&' separators, supports elements that are arrayrefs and hashrefs
1.191 harris41 5224:
5225: =item *
5226:
1.243 albertel 5227: hashref2str($hashref) : convert a hashref into a string complete with
5228: escaping and '=' and '&' separators, supports elements that are
5229: arrayrefs and hashrefs
1.191 harris41 5230:
5231: =item *
5232:
1.243 albertel 5233: arrayref2str($arrayref) : convert an arrayref into a string complete
5234: with escaping and '&' separators, supports elements that are arrayrefs
5235: and hashrefs
1.191 harris41 5236:
5237: =item *
5238:
1.243 albertel 5239: str2hash($string) : convert string to hash using unescaping and
5240: splitting on '=' and '&', supports elements that are arrayrefs and
5241: hashrefs
1.191 harris41 5242:
5243: =item *
5244:
1.243 albertel 5245: str2array($string) : convert string to hash using unescaping and
5246: splitting on '&', supports elements that are arrayrefs and hashrefs
5247:
5248: =back
5249:
5250: =head2 Logging Routines
5251:
5252: =over 4
5253:
5254: These routines allow one to make log messages in the lonnet.log and
5255: lonnet.perm logfiles.
1.191 harris41 5256:
5257: =item *
5258:
1.243 albertel 5259: logtouch() : make sure the logfile, lonnet.log, exists
1.191 harris41 5260:
5261: =item *
5262:
1.243 albertel 5263: logthis() : append message to the normal lonnet.log file, it gets
5264: preiodically rolled over and deleted.
1.191 harris41 5265:
5266: =item *
5267:
1.243 albertel 5268: logperm() : append a permanent message to lonnet.perm.log, this log
5269: file never gets deleted by any automated portion of the system, only
5270: messages of critical importance should go in here.
5271:
5272: =back
5273:
5274: =head2 General File Helper Routines
5275:
5276: =over 4
1.191 harris41 5277:
5278: =item *
5279:
1.243 albertel 5280: getfile($file) : returns the entire contents of a file or -1; it
5281: properly subscribes to and replicates the file if neccessary.
1.191 harris41 5282:
5283: =item *
5284:
1.243 albertel 5285: filelocation($dir,$file) : returns file system location of a file
5286: based on URI; meant to be "fairly clean" absolute reference, $dir is a
5287: directory that relative $file lookups are to looked in ($dir of /a/dir
5288: and a file of ../bob will become /a/bob)
1.191 harris41 5289:
5290: =item *
5291:
5292: hreflocation($dir,$file) : returns file system location or a URL; same as
5293: filelocation except for hrefs
5294:
5295: =item *
5296:
5297: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
5298:
1.243 albertel 5299: =back
5300:
5301: =head2 HTTP Helper Routines
5302:
5303: =over 4
5304:
1.191 harris41 5305: =item *
5306:
5307: escape() : unpack non-word characters into CGI-compatible hex codes
5308:
5309: =item *
5310:
5311: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
5312:
1.243 albertel 5313: =back
5314:
5315: =head1 PRIVATE SUBROUTINES
5316:
5317: =head2 Underlying communication routines (Shouldn't call)
5318:
5319: =over 4
5320:
5321: =item *
5322:
5323: subreply() : tries to pass a message to lonc, returns con_lost if incapable
5324:
5325: =item *
5326:
5327: reply() : uses subreply to send a message to remote machine, logs all failures
5328:
5329: =item *
5330:
5331: critical() : passes a critical message to another server; if cannot
5332: get through then place message in connection buffer directory and
5333: returns con_delayed, if incapable of saving message, returns
5334: con_failed
5335:
5336: =item *
5337:
5338: reconlonc() : tries to reconnect lonc client processes.
5339:
5340: =back
5341:
5342: =head2 Resource Access Logging
5343:
5344: =over 4
5345:
5346: =item *
5347:
5348: flushcourselogs() : flush (save) buffer logs and access logs
5349:
5350: =item *
5351:
5352: courselog($what) : save message for course in hash
5353:
5354: =item *
5355:
5356: courseacclog($what) : save message for course using &courselog(). Perform
5357: special processing for specific resource types (problems, exams, quizzes, etc).
5358:
1.191 harris41 5359: =item *
5360:
5361: goodbye() : flush course logs and log shutting down; it is called in srm.conf
5362: as a PerlChildExitHandler
1.243 albertel 5363:
5364: =back
5365:
5366: =head2 Other
5367:
5368: =over 4
5369:
5370: =item *
5371:
5372: symblist($mapname,%newhash) : update symbolic storage links
1.191 harris41 5373:
5374: =back
5375:
5376: =cut
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