Annotation of loncom/lonnet/perl/lonnet.pm, revision 1.487
1.1 albertel 1: # The LearningOnline Network
2: # TCP networking package
1.12 www 3: #
1.487 ! albertel 4: # $Id: lonnet.pm,v 1.486 2004/04/05 18:07:38 www Exp $
1.178 www 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
1.169 harris41 28: ###
29:
1.1 albertel 30: package Apache::lonnet;
31:
32: use strict;
1.8 www 33: use LWP::UserAgent();
1.15 www 34: use HTTP::Headers;
1.486 www 35: use HTTP::Date;
36: # use Date::Parse;
1.11 www 37: use vars
1.300 albertel 38: qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom
1.440 www 39: %libserv %pr %prp %metacache %packagetab %titlecache %courseresversioncache %resversioncache
1.349 www 40: %courselogs %accesshash %userrolehash $processmarker $dumpcount
1.352 www 41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseresdatacache
1.420 albertel 42: %userresdatacache %usectioncache %domaindescription %domain_auth_def %domain_auth_arg_def
1.403 www 43: %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir);
44:
1.1 albertel 45: use IO::Socket;
1.31 www 46: use GDBM_File;
1.8 www 47: use Apache::Constants qw(:common :http);
1.208 albertel 48: use HTML::LCParser;
1.88 www 49: use Fcntl qw(:flock);
1.294 matthew 50: use Apache::loncoursedata;
1.414 www 51: use Apache::lonlocal;
1.428 albertel 52: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw);
1.425 albertel 53: use Time::HiRes();
1.195 www 54: my $readit;
1.1 albertel 55:
1.449 matthew 56: =pod
57:
58: =head1 Package Variables
59:
60: These are largely undocumented, so if you decipher one please note it here.
61:
62: =over 4
63:
64: =item $processmarker
65:
66: Contains the time this process was started and this servers host id.
67:
68: =item $dumpcount
69:
70: Counts the number of times a message log flush has been attempted (regardless
71: of success) by this process. Used as part of the filename when messages are
72: delayed.
73:
74: =back
75:
76: =cut
77:
78:
1.1 albertel 79: # --------------------------------------------------------------------- Logging
80:
1.163 harris41 81: sub logtouch {
82: my $execdir=$perlvar{'lonDaemons'};
1.448 albertel 83: unless (-e "$execdir/logs/lonnet.log") {
84: open(my $fh,">>$execdir/logs/lonnet.log");
1.163 harris41 85: close $fh;
86: }
87: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
88: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
89: }
90:
1.1 albertel 91: sub logthis {
92: my $message=shift;
93: my $execdir=$perlvar{'lonDaemons'};
94: my $now=time;
95: my $local=localtime($now);
1.448 albertel 96: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
97: print $fh "$local ($$): $message\n";
98: close($fh);
99: }
1.1 albertel 100: return 1;
101: }
102:
103: sub logperm {
104: my $message=shift;
105: my $execdir=$perlvar{'lonDaemons'};
106: my $now=time;
107: my $local=localtime($now);
1.448 albertel 108: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
109: print $fh "$now:$message:$local\n";
110: close($fh);
111: }
1.1 albertel 112: return 1;
113: }
114:
115: # -------------------------------------------------- Non-critical communication
116: sub subreply {
117: my ($cmd,$server)=@_;
118: my $peerfile="$perlvar{'lonSockDir'}/$server";
119: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
120: Type => SOCK_STREAM,
121: Timeout => 10)
122: or return "con_lost";
123: print $client "$cmd\n";
124: my $answer=<$client>;
1.9 www 125: if (!$answer) { $answer="con_lost"; }
1.1 albertel 126: chomp($answer);
127: return $answer;
128: }
129:
130: sub reply {
131: my ($cmd,$server)=@_;
1.205 www 132: unless (defined($hostname{$server})) { return 'no_such_host'; }
1.1 albertel 133: my $answer=subreply($cmd,$server);
1.203 www 134: if ($answer eq 'con_lost') {
1.311 matthew 135: #sleep 5;
136: #$answer=subreply($cmd,$server);
137: #if ($answer eq 'con_lost') {
1.233 albertel 138: # &logthis("Second attempt con_lost on $server");
139: # my $peerfile="$perlvar{'lonSockDir'}/$server";
140: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
141: # Type => SOCK_STREAM,
142: # Timeout => 10)
143: # or return "con_lost";
144: # &logthis("Killing socket");
145: # print $client "close_connection_exit\n";
146: #sleep 5;
147: # $answer=subreply($cmd,$server);
148: #}
1.203 www 149: }
1.65 www 150: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
1.12 www 151: &logthis("<font color=blue>WARNING:".
152: " $cmd to $server returned $answer</font>");
153: }
1.1 albertel 154: return $answer;
155: }
156:
157: # ----------------------------------------------------------- Send USR1 to lonc
158:
159: sub reconlonc {
160: my $peerfile=shift;
161: &logthis("Trying to reconnect for $peerfile");
162: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
1.448 albertel 163: if (open(my $fh,"<$loncfile")) {
1.1 albertel 164: my $loncpid=<$fh>;
165: chomp($loncpid);
166: if (kill 0 => $loncpid) {
167: &logthis("lonc at pid $loncpid responding, sending USR1");
168: kill USR1 => $loncpid;
169: sleep 1;
170: if (-e "$peerfile") { return; }
171: &logthis("$peerfile still not there, give it another try");
172: sleep 5;
173: if (-e "$peerfile") { return; }
1.12 www 174: &logthis(
175: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
1.1 albertel 176: } else {
1.12 www 177: &logthis(
178: "<font color=blue>WARNING:".
179: " lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 180: }
181: } else {
1.12 www 182: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
1.1 albertel 183: }
184: }
185:
186: # ------------------------------------------------------ Critical communication
1.12 www 187:
1.1 albertel 188: sub critical {
189: my ($cmd,$server)=@_;
1.89 www 190: unless ($hostname{$server}) {
191: &logthis("<font color=blue>WARNING:".
192: " Critical message to unknown server ($server)</font>");
193: return 'no_such_host';
194: }
1.1 albertel 195: my $answer=reply($cmd,$server);
196: if ($answer eq 'con_lost') {
197: my $pingreply=reply('ping',$server);
198: &reconlonc("$perlvar{'lonSockDir'}/$server");
199: my $pongreply=reply('pong',$server);
200: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
201: $answer=reply($cmd,$server);
202: if ($answer eq 'con_lost') {
203: my $now=time;
204: my $middlename=$cmd;
1.5 www 205: $middlename=substr($middlename,0,16);
1.1 albertel 206: $middlename=~s/\W//g;
207: my $dfilename=
1.305 www 208: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
209: $dumpcount++;
1.1 albertel 210: {
1.448 albertel 211: my $dfh;
212: if (open($dfh,">$dfilename")) {
213: print $dfh "$cmd\n";
214: close($dfh);
215: }
1.1 albertel 216: }
217: sleep 2;
218: my $wcmd='';
219: {
1.448 albertel 220: my $dfh;
221: if (open($dfh,"<$dfilename")) {
222: $wcmd=<$dfh>;
223: close($dfh);
224: }
1.1 albertel 225: }
226: chomp($wcmd);
1.7 www 227: if ($wcmd eq $cmd) {
1.12 www 228: &logthis("<font color=blue>WARNING: ".
229: "Connection buffer $dfilename: $cmd</font>");
1.1 albertel 230: &logperm("D:$server:$cmd");
231: return 'con_delayed';
232: } else {
1.12 www 233: &logthis("<font color=red>CRITICAL:"
234: ." Critical connection failed: $server $cmd</font>");
1.1 albertel 235: &logperm("F:$server:$cmd");
236: return 'con_failed';
237: }
238: }
239: }
240: return $answer;
1.405 albertel 241: }
242:
1.412 www 243: #
1.405 albertel 244: # -------------- Remove all key from the env that start witha lowercase letter
1.412 www 245: # (Which is always a lon-capa value)
246:
1.405 albertel 247: sub cleanenv {
1.412 www 248: # unless (defined(&Apache::exists_config_define("MODPERL2"))) { return; }
249: # unless (&Apache::exists_config_define("MODPERL2")) { return; }
1.405 albertel 250: foreach my $key (keys(%ENV)) {
251: if ($key =~ /^[a-z]/) {
252: delete($ENV{$key});
253: }
254: }
1.374 www 255: }
256:
257: # ------------------------------------------- Transfer profile into environment
258:
259: sub transfer_profile_to_env {
260: my ($lonidsdir,$handle)=@_;
261: my @profile;
262: {
1.448 albertel 263: open(my $idf,"$lonidsdir/$handle.id");
1.374 www 264: flock($idf,LOCK_SH);
265: @profile=<$idf>;
1.448 albertel 266: close($idf);
1.374 www 267: }
268: my $envi;
1.433 matthew 269: my %Remove;
1.374 www 270: for ($envi=0;$envi<=$#profile;$envi++) {
271: chomp($profile[$envi]);
272: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
273: $ENV{$envname} = $envvalue;
1.433 matthew 274: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
275: if ($time < time-300) {
276: $Remove{$key}++;
277: }
278: }
279: }
1.446 albertel 280: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
1.433 matthew 281: foreach my $expired_key (keys(%Remove)) {
282: &delenv($expired_key);
1.374 www 283: }
1.1 albertel 284: }
285:
1.5 www 286: # ---------------------------------------------------------- Append Environment
287:
288: sub appenv {
1.6 www 289: my %newenv=@_;
1.191 harris41 290: foreach (keys %newenv) {
1.35 www 291: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
292: &logthis("<font color=blue>WARNING: ".
1.151 www 293: "Attempt to modify environment ".$_." to ".$newenv{$_}
294: .'</font>');
1.35 www 295: delete($newenv{$_});
296: } else {
297: $ENV{$_}=$newenv{$_};
298: }
1.191 harris41 299: }
1.95 www 300:
301: my $lockfh;
1.448 albertel 302: unless (open($lockfh,"$ENV{'user.environment'}")) {
303: return 'error: '.$!;
1.95 www 304: }
305: unless (flock($lockfh,LOCK_EX)) {
306: &logthis("<font color=blue>WARNING: ".
307: 'Could not obtain exclusive lock in appenv: '.$!);
1.448 albertel 308: close($lockfh);
1.95 www 309: return 'error: '.$!;
310: }
311:
1.6 www 312: my @oldenv;
313: {
1.448 albertel 314: my $fh;
315: unless (open($fh,"$ENV{'user.environment'}")) {
316: return 'error: '.$!;
317: }
318: @oldenv=<$fh>;
319: close($fh);
1.6 www 320: }
321: for (my $i=0; $i<=$#oldenv; $i++) {
322: chomp($oldenv[$i]);
1.9 www 323: if ($oldenv[$i] ne '') {
1.448 albertel 324: my ($name,$value)=split(/=/,$oldenv[$i]);
325: unless (defined($newenv{$name})) {
326: $newenv{$name}=$value;
327: }
1.9 www 328: }
1.6 www 329: }
330: {
1.448 albertel 331: my $fh;
332: unless (open($fh,">$ENV{'user.environment'}")) {
333: return 'error';
334: }
335: my $newname;
336: foreach $newname (keys %newenv) {
337: print $fh "$newname=$newenv{$newname}\n";
338: }
339: close($fh);
1.56 www 340: }
1.448 albertel 341:
342: close($lockfh);
1.56 www 343: return 'ok';
344: }
345: # ----------------------------------------------------- Delete from Environment
346:
347: sub delenv {
348: my $delthis=shift;
349: my %newenv=();
350: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
351: &logthis("<font color=blue>WARNING: ".
352: "Attempt to delete from environment ".$delthis);
353: return 'error';
354: }
355: my @oldenv;
356: {
1.448 albertel 357: my $fh;
358: unless (open($fh,"$ENV{'user.environment'}")) {
359: return 'error';
360: }
361: unless (flock($fh,LOCK_SH)) {
362: &logthis("<font color=blue>WARNING: ".
363: 'Could not obtain shared lock in delenv: '.$!);
364: close($fh);
365: return 'error: '.$!;
366: }
367: @oldenv=<$fh>;
368: close($fh);
1.56 www 369: }
370: {
1.448 albertel 371: my $fh;
372: unless (open($fh,">$ENV{'user.environment'}")) {
373: return 'error';
374: }
375: unless (flock($fh,LOCK_EX)) {
376: &logthis("<font color=blue>WARNING: ".
377: 'Could not obtain exclusive lock in delenv: '.$!);
378: close($fh);
379: return 'error: '.$!;
380: }
381: foreach (@oldenv) {
1.473 matthew 382: if ($_=~/^$delthis/) {
383: my ($key,undef) = split('=',$_);
384: delete($ENV{$key});
385: } else {
386: print $fh $_;
387: }
1.448 albertel 388: }
389: close($fh);
1.5 www 390: }
391: return 'ok';
1.369 albertel 392: }
393:
394: # ------------------------------------------ Find out current server userload
395: # there is a copy in lond
396: sub userload {
397: my $numusers=0;
398: {
399: opendir(LONIDS,$perlvar{'lonIDsDir'});
400: my $filename;
401: my $curtime=time;
402: while ($filename=readdir(LONIDS)) {
403: if ($filename eq '.' || $filename eq '..') {next;}
1.404 albertel 404: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.437 albertel 405: if ($curtime-$mtime < 1800) { $numusers++; }
1.369 albertel 406: }
407: closedir(LONIDS);
408: }
409: my $userloadpercent=0;
410: my $maxuserload=$perlvar{'lonUserLoadLim'};
411: if ($maxuserload) {
1.371 albertel 412: $userloadpercent=100*$numusers/$maxuserload;
1.369 albertel 413: }
1.372 albertel 414: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.369 albertel 415: return $userloadpercent;
1.283 www 416: }
417:
418: # ------------------------------------------ Fight off request when overloaded
419:
420: sub overloaderror {
421: my ($r,$checkserver)=@_;
422: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
423: my $loadavg;
424: if ($checkserver eq $perlvar{'lonHostID'}) {
1.448 albertel 425: open(my $loadfile,'/proc/loadavg');
1.283 www 426: $loadavg=<$loadfile>;
427: $loadavg =~ s/\s.*//g;
1.285 matthew 428: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
1.448 albertel 429: close($loadfile);
1.283 www 430: } else {
431: $loadavg=&reply('load',$checkserver);
432: }
1.285 matthew 433: my $overload=$loadavg-100;
1.283 www 434: if ($overload>0) {
1.285 matthew 435: $r->err_headers_out->{'Retry-After'}=$overload;
1.283 www 436: $r->log_error('Overload of '.$overload.' on '.$checkserver);
437: return 413;
438: }
439: return '';
1.5 www 440: }
1.1 albertel 441:
442: # ------------------------------ Find server with least workload from spare.tab
1.11 www 443:
1.1 albertel 444: sub spareserver {
1.370 albertel 445: my ($loadpercent,$userloadpercent) = @_;
1.1 albertel 446: my $tryserver;
447: my $spareserver='';
1.370 albertel 448: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
449: my $lowestserver=$loadpercent > $userloadpercent?
450: $loadpercent : $userloadpercent;
1.1 albertel 451: foreach $tryserver (keys %spareid) {
1.411 albertel 452: my $loadans=reply('load',$tryserver);
453: my $userloadans=reply('userload',$tryserver);
454: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
455: next; #didn't get a number from the server
456: }
457: my $answer;
458: if ($loadans =~ /\d/) {
459: if ($userloadans =~ /\d/) {
460: #both are numbers, pick the bigger one
461: $answer=$loadans > $userloadans?
462: $loadans : $userloadans;
463: } else {
464: $answer = $loadans;
465: }
466: } else {
467: $answer = $userloadans;
468: }
469: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
470: $spareserver="http://$hostname{$tryserver}";
471: $lowestserver=$answer;
472: }
1.370 albertel 473: }
1.1 albertel 474: return $spareserver;
1.202 matthew 475: }
476:
477: # --------------------------------------------- Try to change a user's password
478:
479: sub changepass {
480: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
481: $currentpass = &escape($currentpass);
482: $newpass = &escape($newpass);
483: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
484: $server);
485: if (! $answer) {
486: &logthis("No reply on password change request to $server ".
487: "by $uname in domain $udom.");
488: } elsif ($answer =~ "^ok") {
489: &logthis("$uname in $udom successfully changed their password ".
490: "on $server.");
491: } elsif ($answer =~ "^pwchange_failure") {
492: &logthis("$uname in $udom was unable to change their password ".
493: "on $server. The action was blocked by either lcpasswd ".
494: "or pwchange");
495: } elsif ($answer =~ "^non_authorized") {
496: &logthis("$uname in $udom did not get their password correct when ".
497: "attempting to change it on $server.");
498: } elsif ($answer =~ "^auth_mode_error") {
499: &logthis("$uname in $udom attempted to change their password despite ".
500: "not being locally or internally authenticated on $server.");
501: } elsif ($answer =~ "^unknown_user") {
502: &logthis("$uname in $udom attempted to change their password ".
503: "on $server but were unable to because $server is not ".
504: "their home server.");
505: } elsif ($answer =~ "^refused") {
506: &logthis("$server refused to change $uname in $udom password because ".
507: "it was sent an unencrypted request to change the password.");
508: }
509: return $answer;
1.1 albertel 510: }
511:
1.169 harris41 512: # ----------------------- Try to determine user's current authentication scheme
513:
514: sub queryauthenticate {
515: my ($uname,$udom)=@_;
1.456 albertel 516: my $uhome=&homeserver($uname,$udom);
517: if (!$uhome) {
518: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
519: return 'no_host';
520: }
521: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
522: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
523: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
1.169 harris41 524: }
1.456 albertel 525: return $answer;
1.169 harris41 526: }
527:
1.1 albertel 528: # --------- Try to authenticate user from domain's lib servers (first this one)
1.11 www 529:
1.1 albertel 530: sub authenticate {
531: my ($uname,$upass,$udom)=@_;
1.12 www 532: $upass=escape($upass);
1.199 www 533: $uname=~s/\W//g;
1.471 albertel 534: my $uhome=&homeserver($uname,$udom);
535: if (!$uhome) {
536: &logthis("User $uname at $udom is unknown in authenticate");
537: return 'no_host';
1.1 albertel 538: }
1.471 albertel 539: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
540: if ($answer eq 'authorized') {
541: &logthis("User $uname at $udom authorized by $uhome");
542: return $uhome;
543: }
544: if ($answer eq 'non_authorized') {
545: &logthis("User $uname at $udom rejected by $uhome");
546: return 'no_host';
1.9 www 547: }
1.471 albertel 548: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
1.1 albertel 549: return 'no_host';
550: }
551:
552: # ---------------------- Find the homebase for a user from domain's lib servers
1.11 www 553:
1.1 albertel 554: sub homeserver {
1.230 stredwic 555: my ($uname,$udom,$ignoreBadCache)=@_;
1.1 albertel 556: my $index="$uname:$udom";
1.426 albertel 557:
558: my ($result,$cached)=&is_cached(\%homecache,$index,'home',86400);
559: if (defined($cached)) { return $result; }
1.1 albertel 560: my $tryserver;
561: foreach $tryserver (keys %libserv) {
1.230 stredwic 562: next if ($ignoreBadCache ne 'true' &&
1.231 stredwic 563: exists($badServerCache{$tryserver}));
1.1 albertel 564: if ($hostdom{$tryserver} eq $udom) {
565: my $answer=reply("home:$udom:$uname",$tryserver);
566: if ($answer eq 'found') {
1.426 albertel 567: return &do_cache(\%homecache,$index,$tryserver,'home');
1.231 stredwic 568: } elsif ($answer eq 'no_host') {
569: $badServerCache{$tryserver}=1;
1.221 matthew 570: }
1.1 albertel 571: }
572: }
573: return 'no_host';
1.70 www 574: }
575:
576: # ------------------------------------- Find the usernames behind a list of IDs
577:
578: sub idget {
579: my ($udom,@ids)=@_;
580: my %returnhash=();
581:
582: my $tryserver;
583: foreach $tryserver (keys %libserv) {
584: if ($hostdom{$tryserver} eq $udom) {
585: my $idlist=join('&',@ids);
586: $idlist=~tr/A-Z/a-z/;
587: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
588: my @answer=();
1.76 www 589: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
1.70 www 590: @answer=split(/\&/,$reply);
591: } ;
592: my $i;
593: for ($i=0;$i<=$#ids;$i++) {
594: if ($answer[$i]) {
595: $returnhash{$ids[$i]}=$answer[$i];
596: }
597: }
598: }
599: }
600: return %returnhash;
601: }
602:
603: # ------------------------------------- Find the IDs behind a list of usernames
604:
605: sub idrget {
606: my ($udom,@unames)=@_;
607: my %returnhash=();
1.191 harris41 608: foreach (@unames) {
1.70 www 609: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
1.191 harris41 610: }
1.70 www 611: return %returnhash;
612: }
613:
614: # ------------------------------- Store away a list of names and associated IDs
615:
616: sub idput {
617: my ($udom,%ids)=@_;
618: my %servers=();
1.191 harris41 619: foreach (keys %ids) {
1.487 ! albertel 620: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
1.70 www 621: my $uhom=&homeserver($_,$udom);
622: if ($uhom ne 'no_host') {
623: my $id=&escape($ids{$_});
624: $id=~tr/A-Z/a-z/;
625: my $unam=&escape($_);
626: if ($servers{$uhom}) {
627: $servers{$uhom}.='&'.$id.'='.$unam;
628: } else {
629: $servers{$uhom}=$id.'='.$unam;
630: }
631: }
1.191 harris41 632: }
633: foreach (keys %servers) {
1.70 www 634: &critical('idput:'.$udom.':'.$servers{$_},$_);
1.191 harris41 635: }
1.344 www 636: }
637:
638: # --------------------------------------------------- Assign a key to a student
639:
640: sub assign_access_key {
1.364 www 641: #
642: # a valid key looks like uname:udom#comments
643: # comments are being appended
644: #
645: my ($ckey,$cdom,$cnum,$udom,$uname,$logentry)=@_;
1.344 www 646: $cdom=
647: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
648: $cnum=
649: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
650: $udom=$ENV{'user.name'} unless (defined($udom));
651: $uname=$ENV{'user.domain'} unless (defined($uname));
1.345 www 652: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
1.364 www 653: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
1.479 albertel 654: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
1.364 www 655: # assigned to this person
656: # - this should not happen,
1.345 www 657: # unless something went wrong
658: # the first time around
659: # ready to assign
1.364 www 660: $logentry=$1.'; '.$logentry;
661: if (&put('accesskey',{$ckey=>$uname.':'.$udom.'#'.$logentry},
662: $cdom,$cnum) eq 'ok') {
1.345 www 663: # key now belongs to user
1.346 www 664: my $envkey='key.'.$cdom.'_'.$cnum;
1.345 www 665: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
666: &appenv('environment.'.$envkey => $ckey);
667: return 'ok';
668: } else {
669: return
670: 'error: Count not permanently assign key, will need to be re-entered later.';
671: }
672: } else {
673: return 'error: Could not assign key, try again later.';
674: }
1.364 www 675: } elsif (!$existing{$ckey}) {
1.345 www 676: # the key does not exist
677: return 'error: The key does not exist';
678: } else {
679: # the key is somebody else's
680: return 'error: The key is already in use';
681: }
1.344 www 682: }
683:
1.364 www 684: # ------------------------------------------ put an additional comment on a key
685:
686: sub comment_access_key {
687: #
688: # a valid key looks like uname:udom#comments
689: # comments are being appended
690: #
691: my ($ckey,$cdom,$cnum,$logentry)=@_;
692: $cdom=
693: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
694: $cnum=
695: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
696: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
697: if ($existing{$ckey}) {
698: $existing{$ckey}.='; '.$logentry;
699: # ready to assign
1.367 www 700: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
1.364 www 701: $cdom,$cnum) eq 'ok') {
702: return 'ok';
703: } else {
704: return 'error: Count not store comment.';
705: }
706: } else {
707: # the key does not exist
708: return 'error: The key does not exist';
709: }
710: }
711:
1.344 www 712: # ------------------------------------------------------ Generate a set of keys
713:
714: sub generate_access_keys {
1.364 www 715: my ($number,$cdom,$cnum,$logentry)=@_;
1.344 www 716: $cdom=
717: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
718: $cnum=
719: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
1.361 www 720: unless (&allowed('mky',$cdom)) { return 0; }
1.344 www 721: unless (($cdom) && ($cnum)) { return 0; }
722: if ($number>10000) { return 0; }
723: sleep(2); # make sure don't get same seed twice
724: srand(time()^($$+($$<<15))); # from "Programming Perl"
725: my $total=0;
726: for (my $i=1;$i<=$number;$i++) {
727: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
728: sprintf("%lx",int(100000*rand)).'-'.
729: sprintf("%lx",int(100000*rand));
730: $newkey=~s/1/g/g; # folks mix up 1 and l
731: $newkey=~s/0/h/g; # and also 0 and O
732: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
733: if ($existing{$newkey}) {
734: $i--;
735: } else {
1.364 www 736: if (&put('accesskeys',
737: { $newkey => '# generated '.localtime().
738: ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
739: '; '.$logentry },
740: $cdom,$cnum) eq 'ok') {
1.344 www 741: $total++;
742: }
743: }
744: }
745: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
746: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
747: return $total;
748: }
749:
750: # ------------------------------------------------------- Validate an accesskey
751:
752: sub validate_access_key {
753: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
754: $cdom=
755: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
756: $cnum=
757: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
758: $udom=$ENV{'user.name'} unless (defined($udom));
759: $uname=$ENV{'user.domain'} unless (defined($uname));
1.345 www 760: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
1.479 albertel 761: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
1.70 www 762: }
763:
764: # ------------------------------------- Find the section of student in a course
1.298 matthew 765:
766: sub getsection {
767: my ($udom,$unam,$courseid)=@_;
768: $courseid=~s/\_/\//g;
769: $courseid=~s/^(\w)/\/$1/;
770: my %Pending;
771: my %Expired;
772: #
773: # Each role can either have not started yet (pending), be active,
774: # or have expired.
775: #
776: # If there is an active role, we are done.
777: #
778: # If there is more than one role which has not started yet,
779: # choose the one which will start sooner
780: # If there is one role which has not started yet, return it.
781: #
782: # If there is more than one expired role, choose the one which ended last.
783: # If there is a role which has expired, return it.
784: #
785: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
786: &homeserver($unam,$udom)))) {
787: my ($key,$value)=split(/\=/,$_);
788: $key=&unescape($key);
1.479 albertel 789: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
1.298 matthew 790: my $section=$1;
791: if ($key eq $courseid.'_st') { $section=''; }
792: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
793: my $now=time;
794: if (defined($end) && ($now > $end)) {
795: $Expired{$end}=$section;
796: next;
797: }
798: if (defined($start) && ($now < $start)) {
799: $Pending{$start}=$section;
800: next;
801: }
802: return $section;
803: }
804: #
805: # Presumedly there will be few matching roles from the above
806: # loop and the sorting time will be negligible.
807: if (scalar(keys(%Pending))) {
808: my ($time) = sort {$a <=> $b} keys(%Pending);
809: return $Pending{$time};
810: }
811: if (scalar(keys(%Expired))) {
812: my @sorted = sort {$a <=> $b} keys(%Expired);
813: my $time = pop(@sorted);
814: return $Expired{$time};
815: }
816: return '-1';
817: }
1.70 www 818:
1.452 albertel 819:
820: my $disk_caching_disabled=1;
821:
1.416 albertel 822: sub devalidate_cache {
1.428 albertel 823: my ($cache,$id,$name) = @_;
1.417 albertel 824: delete $$cache{$id.'.time'};
825: delete $$cache{$id};
1.452 albertel 826: if ($disk_caching_disabled) { return; }
1.442 albertel 827: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
1.428 albertel 828: open(DB,"$filename.lock");
829: flock(DB,LOCK_EX);
830: my %hash;
831: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
1.442 albertel 832: eval <<'EVALBLOCK';
833: delete($hash{$id});
834: delete($hash{$id.'.time'});
835: EVALBLOCK
836: if ($@) {
837: &logthis("<font color='red'>devalidate_cache blew up :$@:$name</font>");
838: unlink($filename);
839: }
1.428 albertel 840: } else {
1.442 albertel 841: if (-e $filename) {
842: &logthis("Unable to tie hash (devalidate cache): $name");
843: unlink($filename);
844: }
1.428 albertel 845: }
846: untie(%hash);
847: flock(DB,LOCK_UN);
848: close(DB);
1.416 albertel 849: }
850:
851: sub is_cached {
1.425 albertel 852: my ($cache,$id,$name,$time) = @_;
1.420 albertel 853: if (!$time) { $time=300; }
1.416 albertel 854: if (!exists($$cache{$id.'.time'})) {
1.428 albertel 855: &load_cache_item($cache,$name,$id);
1.425 albertel 856: }
857: if (!exists($$cache{$id.'.time'})) {
858: # &logthis("Didn't find $id");
1.417 albertel 859: return (undef,undef);
1.416 albertel 860: } else {
1.425 albertel 861: if (time-($$cache{$id.'.time'})>$time) {
1.435 www 862: # &logthis("Devalidating $id - ".time-($$cache{$id.'.time'}));
1.428 albertel 863: &devalidate_cache($cache,$id,$name);
1.417 albertel 864: return (undef,undef);
1.416 albertel 865: }
866: }
1.417 albertel 867: return ($$cache{$id},1);
1.416 albertel 868: }
869:
870: sub do_cache {
1.425 albertel 871: my ($cache,$id,$value,$name) = @_;
1.416 albertel 872: $$cache{$id.'.time'}=time;
1.425 albertel 873: $$cache{$id}=$value;
1.428 albertel 874: # &logthis("Caching $id as :$value:");
875: &save_cache_item($cache,$name,$id);
1.416 albertel 876: # do_cache implictly return the set value
1.425 albertel 877: $$cache{$id};
878: }
879:
1.428 albertel 880: sub save_cache_item {
881: my ($cache,$name,$id)=@_;
1.452 albertel 882: if ($disk_caching_disabled) { return; }
1.428 albertel 883: my $starttime=&Time::HiRes::time();
1.442 albertel 884: # &logthis("Saving :$name:$id");
1.428 albertel 885: my %hash;
1.442 albertel 886: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
1.428 albertel 887: open(DB,"$filename.lock");
888: flock(DB,LOCK_EX);
889: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
1.442 albertel 890: eval <<'EVALBLOCK';
891: $hash{$id.'.time'}=$$cache{$id.'.time'};
892: $hash{$id}=freeze({'item'=>$$cache{$id}});
893: EVALBLOCK
894: if ($@) {
895: &logthis("<font color='red'>save_cache blew up :$@:$name</font>");
896: unlink($filename);
897: }
1.428 albertel 898: } else {
1.442 albertel 899: if (-e $filename) {
1.445 www 900: &logthis("Unable to tie hash (save cache item): $name ($!)");
1.442 albertel 901: unlink($filename);
902: }
1.428 albertel 903: }
904: untie(%hash);
905: flock(DB,LOCK_UN);
906: close(DB);
907: # &logthis("save_cache_item $name took ".(&Time::HiRes::time()-$starttime));
908: }
909:
910: sub load_cache_item {
911: my ($cache,$name,$id)=@_;
1.452 albertel 912: if ($disk_caching_disabled) { return; }
1.428 albertel 913: my $starttime=&Time::HiRes::time();
914: # &logthis("Before Loading $name for $id size is ".scalar(%$cache));
915: my %hash;
1.442 albertel 916: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
1.428 albertel 917: open(DB,"$filename.lock");
918: flock(DB,LOCK_SH);
919: if (tie(%hash,'GDBM_File',$filename,&GDBM_READER(),0640)) {
1.442 albertel 920: eval <<'EVALBLOCK';
921: if (!%$cache) {
922: my $count;
923: while (my ($key,$value)=each(%hash)) {
924: $count++;
925: if ($key =~ /\.time$/) {
926: $$cache{$key}=$value;
927: } else {
928: my $hashref=thaw($value);
929: $$cache{$key}=$hashref->{'item'};
930: }
1.428 albertel 931: }
1.442 albertel 932: # &logthis("Initial load: $count");
933: } else {
934: my $hashref=thaw($hash{$id});
935: $$cache{$id}=$hashref->{'item'};
936: $$cache{$id.'.time'}=$hash{$id.'.time'};
1.428 albertel 937: }
1.442 albertel 938: EVALBLOCK
939: if ($@) {
940: &logthis("<font color='red'>load_cache blew up :$@:$name</font>");
941: unlink($filename);
942: }
943: } else {
944: if (-e $filename) {
1.445 www 945: &logthis("Unable to tie hash (load cache item): $name ($!)");
1.442 albertel 946: unlink($filename);
1.428 albertel 947: }
948: }
949: untie(%hash);
950: flock(DB,LOCK_UN);
951: close(DB);
952: # &logthis("After Loading $name size is ".scalar(%$cache));
953: # &logthis("load_cache_item $name took ".(&Time::HiRes::time()-$starttime));
954: }
955:
1.70 www 956: sub usection {
957: my ($udom,$unam,$courseid)=@_;
1.416 albertel 958: my $hashid="$udom:$unam:$courseid";
959:
1.425 albertel 960: my ($result,$cached)=&is_cached(\%usectioncache,$hashid,'usection');
1.417 albertel 961: if (defined($cached)) { return $result; }
1.70 www 962: $courseid=~s/\_/\//g;
963: $courseid=~s/^(\w)/\/$1/;
1.191 harris41 964: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
965: &homeserver($unam,$udom)))) {
1.70 www 966: my ($key,$value)=split(/\=/,$_);
967: $key=&unescape($key);
1.479 albertel 968: if ($key=~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/) {
1.70 www 969: my $section=$1;
970: if ($key eq $courseid.'_st') { $section=''; }
971: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
972: my $now=time;
973: my $notactive=0;
974: if ($start) {
975: if ($now<$start) { $notactive=1; }
976: }
977: if ($end) {
978: if ($now>$end) { $notactive=1; }
979: }
1.416 albertel 980: unless ($notactive) {
1.425 albertel 981: return &do_cache(\%usectioncache,$hashid,$section,'usection');
1.416 albertel 982: }
1.70 www 983: }
1.191 harris41 984: }
1.425 albertel 985: return &do_cache(\%usectioncache,$hashid,'-1','usection');
1.70 www 986: }
987:
988: # ------------------------------------- Read an entry from a user's environment
989:
990: sub userenvironment {
991: my ($udom,$unam,@what)=@_;
992: my %returnhash=();
993: my @answer=split(/\&/,
994: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
995: &homeserver($unam,$udom)));
996: my $i;
997: for ($i=0;$i<=$#what;$i++) {
998: $returnhash{$what[$i]}=&unescape($answer[$i]);
999: }
1000: return %returnhash;
1.1 albertel 1001: }
1002:
1.263 www 1003: # -------------------------------------------------------------------- New chat
1004:
1005: sub chatsend {
1006: my ($newentry,$anon)=@_;
1007: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1008: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1009: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1010: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1011: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
1012: &escape($newentry)),$chome);
1.292 www 1013: }
1014:
1015: # ------------------------------------------ Find current version of a resource
1016:
1017: sub getversion {
1018: my $fname=&clutter(shift);
1019: unless ($fname=~/^\/res\//) { return -1; }
1020: return ¤tversion(&filelocation('',$fname));
1021: }
1022:
1023: sub currentversion {
1024: my $fname=shift;
1.440 www 1025: my ($result,$cached)=&is_cached(\%resversioncache,$fname,'resversion',600);
1026: if (defined($cached)) { return $result; }
1.292 www 1027: my $author=$fname;
1028: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1029: my ($udom,$uname)=split(/\//,$author);
1030: my $home=homeserver($uname,$udom);
1031: if ($home eq 'no_host') {
1032: return -1;
1033: }
1034: my $answer=reply("currentversion:$fname",$home);
1035: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1036: return -1;
1037: }
1.440 www 1038: return &do_cache(\%resversioncache,$fname,$answer,'resversion');
1.263 www 1039: }
1040:
1.1 albertel 1041: # ----------------------------- Subscribe to a resource, return URL if possible
1.11 www 1042:
1.1 albertel 1043: sub subscribe {
1044: my $fname=shift;
1.312 www 1045: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1.1 albertel 1046: my $author=$fname;
1047: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1048: my ($udom,$uname)=split(/\//,$author);
1049: my $home=homeserver($uname,$udom);
1.335 albertel 1050: if ($home eq 'no_host') {
1051: return 'not_found';
1.1 albertel 1052: }
1053: my $answer=reply("sub:$fname",$home);
1.64 www 1054: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1055: $answer.=' by '.$home;
1056: }
1.1 albertel 1057: return $answer;
1058: }
1059:
1.8 www 1060: # -------------------------------------------------------------- Replicate file
1061:
1062: sub repcopy {
1063: my $filename=shift;
1.23 www 1064: $filename=~s/\/+/\//g;
1.214 www 1065: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
1.8 www 1066: my $transname="$filename.in.transfer";
1.17 www 1067: if ((-e $filename) || (-e $transname)) { return OK; }
1.8 www 1068: my $remoteurl=subscribe($filename);
1.64 www 1069: if ($remoteurl =~ /^con_lost by/) {
1070: &logthis("Subscribe returned $remoteurl: $filename");
1.8 www 1071: return HTTP_SERVICE_UNAVAILABLE;
1072: } elsif ($remoteurl eq 'not_found') {
1.441 albertel 1073: #&logthis("Subscribe returned not_found: $filename");
1.8 www 1074: return HTTP_NOT_FOUND;
1.64 www 1075: } elsif ($remoteurl =~ /^rejected by/) {
1076: &logthis("Subscribe returned $remoteurl: $filename");
1.8 www 1077: return FORBIDDEN;
1.20 www 1078: } elsif ($remoteurl eq 'directory') {
1079: return OK;
1.8 www 1080: } else {
1.290 www 1081: my $author=$filename;
1082: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1083: my ($udom,$uname)=split(/\//,$author);
1084: my $home=homeserver($uname,$udom);
1085: unless ($home eq $perlvar{'lonHostID'}) {
1.8 www 1086: my @parts=split(/\//,$filename);
1087: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1088: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1089: &logthis("Malconfiguration for replication: $filename");
1090: return HTTP_BAD_REQUEST;
1091: }
1092: my $count;
1093: for ($count=5;$count<$#parts;$count++) {
1094: $path.="/$parts[$count]";
1095: if ((-e $path)!=1) {
1096: mkdir($path,0777);
1097: }
1098: }
1099: my $ua=new LWP::UserAgent;
1100: my $request=new HTTP::Request('GET',"$remoteurl");
1101: my $response=$ua->request($request,$transname);
1102: if ($response->is_error()) {
1103: unlink($transname);
1104: my $message=$response->status_line;
1.12 www 1105: &logthis("<font color=blue>WARNING:"
1106: ." LWP get: $message: $filename</font>");
1.8 www 1107: return HTTP_SERVICE_UNAVAILABLE;
1108: } else {
1.16 www 1109: if ($remoteurl!~/\.meta$/) {
1110: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1111: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1112: if ($mresponse->is_error()) {
1113: unlink($filename.'.meta');
1114: &logthis(
1115: "<font color=yellow>INFO: No metadata: $filename</font>");
1116: }
1117: }
1.8 www 1118: rename($transname,$filename);
1119: return OK;
1120: }
1.290 www 1121: }
1.8 www 1122: }
1.330 www 1123: }
1124:
1125: # ------------------------------------------------ Get server side include body
1126: sub ssi_body {
1.381 albertel 1127: my ($filelink,%form)=@_;
1.330 www 1128: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1.381 albertel 1129: &ssi($filelink,%form));
1.451 albertel 1130: $output=~s/^.*?\<body[^\>]*\>//si;
1131: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1.331 www 1132: $output=~
1133: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
1.330 www 1134: return $output;
1.8 www 1135: }
1136:
1.15 www 1137: # --------------------------------------------------------- Server Side Include
1138:
1139: sub ssi {
1140:
1.23 www 1141: my ($fn,%form)=@_;
1.15 www 1142:
1143: my $ua=new LWP::UserAgent;
1.23 www 1144:
1145: my $request;
1146:
1147: if (%form) {
1148: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1.201 albertel 1149: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1.23 www 1150: } else {
1151: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1152: }
1153:
1.15 www 1154: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1155: my $response=$ua->request($request);
1156:
1.324 www 1157: return $response->content;
1158: }
1159:
1160: sub externalssi {
1161: my ($url)=@_;
1162: my $ua=new LWP::UserAgent;
1163: my $request=new HTTP::Request('GET',$url);
1164: my $response=$ua->request($request);
1.15 www 1165: return $response->content;
1166: }
1.254 www 1167:
1168: # ------- Add a token to a remote URI's query string to vouch for access rights
1169:
1170: sub tokenwrapper {
1171: my $uri=shift;
1.259 www 1172: $uri=~s/^http\:\/\/([^\/]+)//;
1173: $uri=~s/^\///;
1174: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
1175: my $token=$1;
1.477 raeburn 1176: # if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
1.478 albertel 1177: if ($uri=~m|^uploaded/([^/]+)/([^/]+)/(.+)(\?\.*)*$|) {
1.259 www 1178: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
1179: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
1.304 www 1180: (($uri=~/\?/)?'&':'?').'token='.$token.
1181: '&tokenissued='.$perlvar{'lonHostID'};
1.259 www 1182: } else {
1183: return '/adm/notfound.html';
1184: }
1.254 www 1185: }
1.477 raeburn 1186:
1.478 albertel 1187: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1188: # input: action, courseID, current domain, home server for course, intended
1189: # path to file, source of file.
1.485 raeburn 1190: # output: url to file (if action was uploaddoc),
1191: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1.477 raeburn 1192: #
1.478 albertel 1193: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1194: # course.
1.477 raeburn 1195: #
1.478 albertel 1196: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1197: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1198: # course's home server.
1.477 raeburn 1199: #
1.478 albertel 1200: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1201: # be copied from $source (current location) to
1202: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1203: # and will then be copied to
1204: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1205: # course's home server.
1.485 raeburn 1206: #
1.481 raeburn 1207: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1.485 raeburn 1208: # will be retrived from $ENV{form.uploaddoc} (from DOCS interface) to
1.481 raeburn 1209: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1210: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1211: # in course's home server.
1212:
1.477 raeburn 1213:
1214: sub process_coursefile {
1215: my ($action,$docuname,$docudom,$docuhome,$file,$source)=@_;
1216: my $fetchresult;
1217: if ($action eq 'propagate') {
1218: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file
1219: ,$docuhome);
1.481 raeburn 1220: } else {
1.477 raeburn 1221: my $fetchresult = '';
1222: my $fpath = '';
1223: my $fname = $file;
1.478 albertel 1224: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1.477 raeburn 1225: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1226: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1227: unless ($fpath eq '') {
1.478 albertel 1228: my @parts=split('/',$fpath);
1.477 raeburn 1229: foreach my $part (@parts) {
1230: $filepath.= '/'.$part;
1231: if ((-e $filepath)!=1) {
1232: mkdir($filepath,0777);
1233: }
1234: }
1235: }
1.481 raeburn 1236: if ($action eq 'copy') {
1237: if ($source eq '') {
1238: $fetchresult = 'no source file';
1239: return $fetchresult;
1240: } else {
1241: my $destination = $filepath.'/'.$fname;
1242: rename($source,$destination);
1243: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1244: $docuhome);
1245: }
1246: } elsif ($action eq 'uploaddoc') {
1247: open(my $fh,'>'.$filepath.'/'.$fname);
1248: print $fh $ENV{'form.'.$source};
1249: close($fh);
1.477 raeburn 1250: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1251: $docuhome);
1.481 raeburn 1252: if ($fetchresult eq 'ok') {
1253: return '/uploaded/'.$fpath.'/'.$fname;
1254: } else {
1255: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1256: ' to host '.$docuhome.': '.$fetchresult);
1257: return '/adm/notfound.html';
1258: }
1.477 raeburn 1259: }
1260: }
1.485 raeburn 1261: unless ( $fetchresult eq 'ok') {
1.477 raeburn 1262: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1263: ' to host '.$docuhome.': '.$fetchresult);
1264: }
1265: return $fetchresult;
1266: }
1267:
1.257 www 1268: # --------------- Take an uploaded file and put it into the userfiles directory
1.259 www 1269: # input: name of form element, coursedoc=1 means this is for the course
1.257 www 1270: # output: url of file in userspace
1271:
1272: sub userfileupload {
1.477 raeburn 1273: my ($formname,$coursedoc)=@_;
1274: my $fname=$ENV{'form.'.$formname.'.filename'};
1.315 www 1275: # Replace Windows backslashes by forward slashes
1.257 www 1276: $fname=~s/\\/\//g;
1.315 www 1277: # Get rid of everything but the actual filename
1.257 www 1278: $fname=~s/^.*\/([^\/]+)$/$1/;
1.315 www 1279: # Replace spaces by underscores
1280: $fname=~s/\s+/\_/g;
1281: # Replace all other weird characters by nothing
1.317 www 1282: $fname=~s/[^\w\.\-]//g;
1.315 www 1283: # See if there is anything left
1.257 www 1284: unless ($fname) { return 'error: no uploaded file'; }
1.477 raeburn 1285: chop($ENV{'form.'.$formname});
1.258 www 1286: # Create the directory if not present
1.259 www 1287: my $docuname='';
1288: my $docudom='';
1289: my $docuhome='';
1290: if ($coursedoc) {
1291: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1292: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1293: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1.481 raeburn 1294: if ($ENV{'form.folder'} =~ m/^default/) {
1.485 raeburn 1295: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1.481 raeburn 1296: } else {
1297: $fname=$ENV{'form.folder'}.'/'.$fname;
1.485 raeburn 1298: return &process_coursefile('uploaddoc',$docuname,$docudom,$docuhome,$fname,$formname);
1.481 raeburn 1299: }
1.259 www 1300: } else {
1301: $docuname=$ENV{'user.name'};
1302: $docudom=$ENV{'user.domain'};
1303: $docuhome=$ENV{'user.home'};
1.485 raeburn 1304: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1.259 www 1305: }
1.271 www 1306: }
1307:
1308: sub finishuserfileupload {
1.477 raeburn 1309: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1310: my $path=$docudom.'/'.$docuname.'/';
1.258 www 1311: my $filepath=$perlvar{'lonDocRoot'};
1.259 www 1312: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1.258 www 1313: my $count;
1314: for ($count=4;$count<=$#parts;$count++) {
1315: $filepath.="/$parts[$count]";
1316: if ((-e $filepath)!=1) {
1317: mkdir($filepath,0777);
1318: }
1319: }
1320: # Save the file
1321: {
1.477 raeburn 1322: open(my $fh,'>'.$filepath.'/'.$fname);
1323: print $fh $ENV{'form.'.$formname};
1324: close($fh);
1.258 www 1325: }
1.259 www 1326: # Notify homeserver to grep it
1327: #
1.477 raeburn 1328: my $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,
1329: $docuhome);
1.295 www 1330: if ($fetchresult eq 'ok') {
1.259 www 1331: #
1.258 www 1332: # Return the URL to it
1.263 www 1333: return '/uploaded/'.$path.$fname;
1334: } else {
1.295 www 1335: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
1336: ' to host '.$docuhome.': '.$fetchresult);
1.263 www 1337: return '/adm/notfound.html';
1338: }
1.257 www 1339: }
1.15 www 1340:
1.14 www 1341: # ------------------------------------------------------------------------- Log
1342:
1343: sub log {
1344: my ($dom,$nam,$hom,$what)=@_;
1.47 www 1345: return critical("log:$dom:$nam:$what",$hom);
1.157 www 1346: }
1347:
1348: # ------------------------------------------------------------------ Course Log
1.352 www 1349: #
1350: # This routine flushes several buffers of non-mission-critical nature
1351: #
1.157 www 1352:
1353: sub flushcourselogs {
1.352 www 1354: &logthis('Flushing log buffers');
1355: #
1356: # course logs
1357: # This is a log of all transactions in a course, which can be used
1358: # for data mining purposes
1359: #
1360: # It also collects the courseid database, which lists last transaction
1361: # times and course titles for all courseids
1362: #
1363: my %courseidbuffer=();
1.191 harris41 1364: foreach (keys %courselogs) {
1.157 www 1365: my $crsid=$_;
1.352 www 1366: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1.188 www 1367: &escape($courselogs{$crsid}),
1368: $coursehombuf{$crsid}) eq 'ok') {
1.157 www 1369: delete $courselogs{$crsid};
1370: } else {
1371: &logthis('Failed to flush log buffer for '.$crsid);
1372: if (length($courselogs{$crsid})>40000) {
1373: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1374: " exceeded maximum size, deleting.</font>");
1375: delete $courselogs{$crsid};
1376: }
1.352 www 1377: }
1378: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1379: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1380: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1381: } else {
1382: $courseidbuffer{$coursehombuf{$crsid}}=
1383: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1384: }
1.191 harris41 1385: }
1.352 www 1386: #
1387: # Write course id database (reverse lookup) to homeserver of courses
1388: # Is used in pickcourse
1389: #
1390: foreach (keys %courseidbuffer) {
1.353 www 1391: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1.352 www 1392: }
1393: #
1394: # File accesses
1395: # Writes to the dynamic metadata of resources to get hit counts, etc.
1396: #
1.449 matthew 1397: foreach my $entry (keys(%accesshash)) {
1.458 matthew 1398: if ($entry =~ /___count$/) {
1399: my ($dom,$name);
1400: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1401: if (! defined($dom) || $dom eq '' ||
1402: ! defined($name) || $name eq '') {
1403: my $cid = $ENV{'request.course.id'};
1404: $dom = $ENV{'request.'.$cid.'.domain'};
1405: $name = $ENV{'request.'.$cid.'.num'};
1406: }
1.450 matthew 1407: my $value = $accesshash{$entry};
1408: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1409: my %temphash=($url => $value);
1.449 matthew 1410: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1411: if ($result eq 'ok') {
1412: delete $accesshash{$entry};
1413: } elsif ($result eq 'unknown_cmd') {
1414: # Target server has old code running on it.
1.450 matthew 1415: my %temphash=($entry => $value);
1.449 matthew 1416: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1417: delete $accesshash{$entry};
1418: }
1419: }
1420: } else {
1.458 matthew 1421: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1.450 matthew 1422: my %temphash=($entry => $accesshash{$entry});
1.449 matthew 1423: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1424: delete $accesshash{$entry};
1425: }
1.185 www 1426: }
1.191 harris41 1427: }
1.352 www 1428: #
1429: # Roles
1430: # Reverse lookup of user roles for course faculty/staff and co-authorship
1431: #
1.349 www 1432: foreach (keys %userrolehash) {
1433: my $entry=$_;
1.351 www 1434: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1.349 www 1435: split(/\:/,$entry);
1436: if (&Apache::lonnet::put('nohist_userroles',
1.351 www 1437: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1.349 www 1438: $rudom,$runame) eq 'ok') {
1439: delete $userrolehash{$entry};
1440: }
1441: }
1.186 www 1442: $dumpcount++;
1.157 www 1443: }
1444:
1445: sub courselog {
1446: my $what=shift;
1.158 www 1447: $what=time.':'.$what;
1.157 www 1448: unless ($ENV{'request.course.id'}) { return ''; }
1.188 www 1449: $coursedombuf{$ENV{'request.course.id'}}=
1.352 www 1450: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1451: $coursenumbuf{$ENV{'request.course.id'}}=
1.188 www 1452: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1453: $coursehombuf{$ENV{'request.course.id'}}=
1454: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1.352 www 1455: $coursedescrbuf{$ENV{'request.course.id'}}=
1456: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1.157 www 1457: if (defined $courselogs{$ENV{'request.course.id'}}) {
1458: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1459: } else {
1460: $courselogs{$ENV{'request.course.id'}}.=$what;
1461: }
1.458 matthew 1462: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1.157 www 1463: &flushcourselogs();
1464: }
1.158 www 1465: }
1466:
1467: sub courseacclog {
1468: my $fnsymb=shift;
1469: unless ($ENV{'request.course.id'}) { return ''; }
1470: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1.408 www 1471: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1.187 www 1472: $what.=':POST';
1.191 harris41 1473: foreach (keys %ENV) {
1.158 www 1474: if ($_=~/^form\.(.*)/) {
1475: $what.=':'.$1.'='.$ENV{$_};
1476: }
1.191 harris41 1477: }
1.158 www 1478: }
1479: &courselog($what);
1.149 www 1480: }
1481:
1.185 www 1482: sub countacc {
1483: my $url=&declutter(shift);
1.458 matthew 1484: return if (! defined($url) || $url eq '');
1.185 www 1485: unless ($ENV{'request.course.id'}) { return ''; }
1486: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1.281 www 1487: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1.450 matthew 1488: $accesshash{$key}++;
1.185 www 1489: }
1.349 www 1490:
1.361 www 1491: sub linklog {
1492: my ($from,$to)=@_;
1493: $from=&declutter($from);
1494: $to=&declutter($to);
1495: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1496: $accesshash{$to.'___'.$from.'___goto'}=1;
1497: }
1498:
1.349 www 1499: sub userrolelog {
1500: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1501: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1502: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1.469 www 1503: ($trole=~/^cr/) || ($trole=~/^ta/)) {
1.350 www 1504: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1505: $userrolehash
1506: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1.349 www 1507: =$tend.':'.$tstart;
1508: }
1.351 www 1509: }
1510:
1511: sub get_course_adv_roles {
1512: my $cid=shift;
1513: $cid=$ENV{'request.course.id'} unless (defined($cid));
1514: my %coursehash=&coursedescription($cid);
1.470 www 1515: my %nothide=();
1516: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1517: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1518: }
1.351 www 1519: my %returnhash=();
1520: my %dumphash=
1521: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1522: my $now=time;
1523: foreach (keys %dumphash) {
1524: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1525: if (($tstart) && ($tstart<0)) { next; }
1526: if (($tend) && ($tend<$now)) { next; }
1527: if (($tstart) && ($now<$tstart)) { next; }
1528: my ($role,$username,$domain,$section)=split(/\:/,$_);
1.470 www 1529: if ((&privileged($username,$domain)) &&
1530: (!$nothide{$username.':'.$domain})) { next; }
1.351 www 1531: my $key=&plaintext($role);
1532: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1533: if ($returnhash{$key}) {
1534: $returnhash{$key}.=','.$username.':'.$domain;
1535: } else {
1536: $returnhash{$key}=$username.':'.$domain;
1537: }
1.400 www 1538: }
1539: return %returnhash;
1540: }
1541:
1542: sub get_my_roles {
1543: my ($uname,$udom)=@_;
1544: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1545: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1546: my %dumphash=
1547: &dump('nohist_userroles',$udom,$uname);
1548: my %returnhash=();
1549: my $now=time;
1550: foreach (keys %dumphash) {
1551: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1552: if (($tstart) && ($tstart<0)) { next; }
1553: if (($tend) && ($tend<$now)) { next; }
1554: if (($tstart) && ($now<$tstart)) { next; }
1555: my ($role,$username,$domain,$section)=split(/\:/,$_);
1556: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1.373 www 1557: }
1558: return %returnhash;
1.399 www 1559: }
1560:
1561: # ----------------------------------------------------- Frontpage Announcements
1562: #
1563: #
1564:
1565: sub postannounce {
1566: my ($server,$text)=@_;
1567: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1568: unless ($text=~/\w/) { $text=''; }
1569: return &reply('setannounce:'.&escape($text),$server);
1570: }
1571:
1572: sub getannounce {
1.448 albertel 1573:
1574: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1.399 www 1575: my $announcement='';
1576: while (<$fh>) { $announcement .=$_; }
1.448 albertel 1577: close($fh);
1.399 www 1578: if ($announcement=~/\w/) {
1579: return
1580: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1581: '<tr><td bgcolor="#FFFFFF"><pre>'.$announcement.'</pre></td></tr></table>';
1582: } else {
1583: return '';
1584: }
1585: } else {
1586: return '';
1587: }
1.351 www 1588: }
1.353 www 1589:
1590: # ---------------------------------------------------------- Course ID routines
1591: # Deal with domain's nohist_courseid.db files
1592: #
1593:
1594: sub courseidput {
1595: my ($domain,$what,$coursehome)=@_;
1596: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1597: }
1598:
1599: sub courseiddump {
1600: my ($domfilter,$descfilter,$sincefilter)=@_;
1601: my %returnhash=();
1.355 www 1602: unless ($domfilter) { $domfilter=''; }
1.353 www 1603: foreach my $tryserver (keys %libserv) {
1.355 www 1604: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1.353 www 1605: foreach (
1606: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1.354 www 1607: $sincefilter.':'.&escape($descfilter),
1608: $tryserver))) {
1.353 www 1609: my ($key,$value)=split(/\=/,$_);
1610: if (($key) && ($value)) {
1611: $returnhash{&unescape($key)}=&unescape($value);
1612: }
1613: }
1614:
1615: }
1616: }
1617: return %returnhash;
1618: }
1619:
1620: #
1.149 www 1621: # ----------------------------------------------------------- Check out an item
1622:
1623: sub checkout {
1624: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1625: my $now=time;
1626: my $lonhost=$perlvar{'lonHostID'};
1627: my $infostr=&escape(
1.234 www 1628: 'CHECKOUTTOKEN&'.
1.149 www 1629: $tuname.'&'.
1630: $tudom.'&'.
1631: $tcrsid.'&'.
1632: $symb.'&'.
1633: $now.'&'.$ENV{'REMOTE_ADDR'});
1634: my $token=&reply('tmpput:'.$infostr,$lonhost);
1.151 www 1635: if ($token=~/^error\:/) {
1636: &logthis("<font color=blue>WARNING: ".
1637: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1638: "</font>");
1639: return '';
1640: }
1641:
1.149 www 1642: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1643: $token=~tr/a-z/A-Z/;
1644:
1.153 www 1645: my %infohash=('resource.0.outtoken' => $token,
1646: 'resource.0.checkouttime' => $now,
1647: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1.149 www 1648:
1649: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1650: return '';
1.151 www 1651: } else {
1652: &logthis("<font color=blue>WARNING: ".
1653: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1654: "</font>");
1.149 www 1655: }
1656:
1657: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1658: &escape('Checkout '.$infostr.' - '.
1659: $token)) ne 'ok') {
1660: return '';
1.151 www 1661: } else {
1662: &logthis("<font color=blue>WARNING: ".
1663: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1664: "</font>");
1.149 www 1665: }
1.151 www 1666: return $token;
1.149 www 1667: }
1668:
1669: # ------------------------------------------------------------ Check in an item
1670:
1671: sub checkin {
1672: my $token=shift;
1.150 www 1673: my $now=time;
1674: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1675: $lonhost=~tr/A-Z/a-z/;
1676: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1677: $dtoken=~s/\W/\_/g;
1.234 www 1678: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1.150 www 1679: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1680:
1.154 www 1681: unless (($tuname) && ($tudom)) {
1682: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1683: return '';
1684: }
1685:
1686: unless (&allowed('mgr',$tcrsid)) {
1687: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1688: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1689: return '';
1690: }
1691:
1.153 www 1692: my %infohash=('resource.0.intoken' => $token,
1693: 'resource.0.checkintime' => $now,
1694: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1.150 www 1695:
1696: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1697: return '';
1698: }
1699:
1700: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1701: &escape('Checkin - '.$token)) ne 'ok') {
1702: return '';
1703: }
1704:
1705: return ($symb,$tuname,$tudom,$tcrsid);
1.110 www 1706: }
1707:
1708: # --------------------------------------------- Set Expire Date for Spreadsheet
1709:
1710: sub expirespread {
1711: my ($uname,$udom,$stype,$usymb)=@_;
1712: my $cid=$ENV{'request.course.id'};
1713: if ($cid) {
1714: my $now=time;
1715: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1716: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1717: $ENV{'course.'.$cid.'.num'}.
1718: ':nohist_expirationdates:'.
1719: &escape($key).'='.$now,
1720: $ENV{'course.'.$cid.'.home'})
1721: }
1722: return 'ok';
1.14 www 1723: }
1724:
1.109 www 1725: # ----------------------------------------------------- Devalidate Spreadsheets
1726:
1727: sub devalidate {
1.325 www 1728: my ($symb,$uname,$udom)=@_;
1.109 www 1729: my $cid=$ENV{'request.course.id'};
1730: if ($cid) {
1.391 matthew 1731: # delete the stored spreadsheets for
1732: # - the student level sheet of this user in course's homespace
1733: # - the assessment level sheet for this resource
1734: # for this user in user's homespace
1.325 www 1735: my $key=$uname.':'.$udom.':';
1.109 www 1736: my $status=
1.299 matthew 1737: &del('nohist_calculatedsheets',
1.391 matthew 1738: [$key.'studentcalc:'],
1.133 albertel 1739: $ENV{'course.'.$cid.'.domain'},
1740: $ENV{'course.'.$cid.'.num'})
1741: .' '.
1742: &del('nohist_calculatedsheets_'.$cid,
1.391 matthew 1743: [$key.'assesscalc:'.$symb],$udom,$uname);
1.109 www 1744: unless ($status eq 'ok ok') {
1745: &logthis('Could not devalidate spreadsheet '.
1.325 www 1746: $uname.' at '.$udom.' for '.
1.109 www 1747: $symb.': '.$status);
1.133 albertel 1748: }
1.109 www 1749: }
1750: }
1751:
1.265 albertel 1752: sub get_scalar {
1753: my ($string,$end) = @_;
1754: my $value;
1755: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1756: $value = $1;
1757: } elsif ($$string =~ s/^([^&]*?)&//) {
1758: $value = $1;
1759: }
1760: return &unescape($value);
1761: }
1762:
1763: sub array2str {
1764: my (@array) = @_;
1765: my $result=&arrayref2str(\@array);
1766: $result=~s/^__ARRAY_REF__//;
1767: $result=~s/__END_ARRAY_REF__$//;
1768: return $result;
1769: }
1770:
1.204 albertel 1771: sub arrayref2str {
1772: my ($arrayref) = @_;
1.265 albertel 1773: my $result='__ARRAY_REF__';
1.204 albertel 1774: foreach my $elem (@$arrayref) {
1.265 albertel 1775: if(ref($elem) eq 'ARRAY') {
1776: $result.=&arrayref2str($elem).'&';
1777: } elsif(ref($elem) eq 'HASH') {
1778: $result.=&hashref2str($elem).'&';
1779: } elsif(ref($elem)) {
1780: #print("Got a ref of ".(ref($elem))." skipping.");
1.204 albertel 1781: } else {
1782: $result.=&escape($elem).'&';
1783: }
1784: }
1785: $result=~s/\&$//;
1.265 albertel 1786: $result .= '__END_ARRAY_REF__';
1.204 albertel 1787: return $result;
1788: }
1789:
1.168 albertel 1790: sub hash2str {
1.204 albertel 1791: my (%hash) = @_;
1792: my $result=&hashref2str(\%hash);
1.265 albertel 1793: $result=~s/^__HASH_REF__//;
1794: $result=~s/__END_HASH_REF__$//;
1.204 albertel 1795: return $result;
1796: }
1797:
1798: sub hashref2str {
1799: my ($hashref)=@_;
1.265 albertel 1800: my $result='__HASH_REF__';
1.204 albertel 1801: foreach (keys(%$hashref)) {
1802: if (ref($_) eq 'ARRAY') {
1.265 albertel 1803: $result.=&arrayref2str($_).'=';
1.204 albertel 1804: } elsif (ref($_) eq 'HASH') {
1.265 albertel 1805: $result.=&hashref2str($_).'=';
1.204 albertel 1806: } elsif (ref($_)) {
1.265 albertel 1807: $result.='=';
1808: #print("Got a ref of ".(ref($_))." skipping.");
1.204 albertel 1809: } else {
1.265 albertel 1810: if ($_) {$result.=&escape($_).'=';} else { last; }
1.204 albertel 1811: }
1812:
1.265 albertel 1813: if(ref($hashref->{$_}) eq 'ARRAY') {
1814: $result.=&arrayref2str($hashref->{$_}).'&';
1815: } elsif(ref($hashref->{$_}) eq 'HASH') {
1816: $result.=&hashref2str($hashref->{$_}).'&';
1817: } elsif(ref($hashref->{$_})) {
1818: $result.='&';
1819: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1.204 albertel 1820: } else {
1.265 albertel 1821: $result.=&escape($hashref->{$_}).'&';
1.204 albertel 1822: }
1823: }
1.168 albertel 1824: $result=~s/\&$//;
1.265 albertel 1825: $result .= '__END_HASH_REF__';
1.168 albertel 1826: return $result;
1827: }
1828:
1829: sub str2hash {
1.265 albertel 1830: my ($string)=@_;
1831: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1832: return %$hash;
1833: }
1834:
1835: sub str2hashref {
1.168 albertel 1836: my ($string) = @_;
1.265 albertel 1837:
1838: my %hash;
1839:
1840: if($string !~ /^__HASH_REF__/) {
1841: if (! ($string eq '' || !defined($string))) {
1842: $hash{'error'}='Not hash reference';
1843: }
1844: return (\%hash, $string);
1845: }
1846:
1847: $string =~ s/^__HASH_REF__//;
1848:
1849: while($string !~ /^__END_HASH_REF__/) {
1850: #key
1851: my $key='';
1852: if($string =~ /^__HASH_REF__/) {
1853: ($key, $string)=&str2hashref($string);
1854: if(defined($key->{'error'})) {
1855: $hash{'error'}='Bad data';
1856: return (\%hash, $string);
1857: }
1858: } elsif($string =~ /^__ARRAY_REF__/) {
1859: ($key, $string)=&str2arrayref($string);
1860: if($key->[0] eq 'Array reference error') {
1861: $hash{'error'}='Bad data';
1862: return (\%hash, $string);
1863: }
1864: } else {
1865: $string =~ s/^(.*?)=//;
1.267 albertel 1866: $key=&unescape($1);
1.265 albertel 1867: }
1868: $string =~ s/^=//;
1869:
1870: #value
1871: my $value='';
1872: if($string =~ /^__HASH_REF__/) {
1873: ($value, $string)=&str2hashref($string);
1874: if(defined($value->{'error'})) {
1875: $hash{'error'}='Bad data';
1876: return (\%hash, $string);
1877: }
1878: } elsif($string =~ /^__ARRAY_REF__/) {
1879: ($value, $string)=&str2arrayref($string);
1880: if($value->[0] eq 'Array reference error') {
1881: $hash{'error'}='Bad data';
1882: return (\%hash, $string);
1883: }
1884: } else {
1885: $value=&get_scalar(\$string,'__END_HASH_REF__');
1886: }
1887: $string =~ s/^&//;
1888:
1889: $hash{$key}=$value;
1.204 albertel 1890: }
1.265 albertel 1891:
1892: $string =~ s/^__END_HASH_REF__//;
1893:
1894: return (\%hash, $string);
1.204 albertel 1895: }
1896:
1897: sub str2array {
1.265 albertel 1898: my ($string)=@_;
1899: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1900: return @$array;
1901: }
1902:
1903: sub str2arrayref {
1.204 albertel 1904: my ($string) = @_;
1.265 albertel 1905: my @array;
1906:
1907: if($string !~ /^__ARRAY_REF__/) {
1908: if (! ($string eq '' || !defined($string))) {
1909: $array[0]='Array reference error';
1910: }
1911: return (\@array, $string);
1912: }
1913:
1914: $string =~ s/^__ARRAY_REF__//;
1915:
1916: while($string !~ /^__END_ARRAY_REF__/) {
1917: my $value='';
1918: if($string =~ /^__HASH_REF__/) {
1919: ($value, $string)=&str2hashref($string);
1920: if(defined($value->{'error'})) {
1921: $array[0] ='Array reference error';
1922: return (\@array, $string);
1923: }
1924: } elsif($string =~ /^__ARRAY_REF__/) {
1925: ($value, $string)=&str2arrayref($string);
1926: if($value->[0] eq 'Array reference error') {
1927: $array[0] ='Array reference error';
1928: return (\@array, $string);
1929: }
1930: } else {
1931: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1932: }
1933: $string =~ s/^&//;
1934:
1935: push(@array, $value);
1.191 harris41 1936: }
1.265 albertel 1937:
1938: $string =~ s/^__END_ARRAY_REF__//;
1939:
1940: return (\@array, $string);
1.168 albertel 1941: }
1942:
1.167 albertel 1943: # -------------------------------------------------------------------Temp Store
1944:
1.168 albertel 1945: sub tmpreset {
1946: my ($symb,$namespace,$domain,$stuname) = @_;
1947: if (!$symb) {
1948: $symb=&symbread();
1.380 albertel 1949: if (!$symb) { $symb= $ENV{'request.url'}; }
1.168 albertel 1950: }
1951: $symb=escape($symb);
1952:
1953: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1954: $namespace=~s/\//\_/g;
1955: $namespace=~s/\W//g;
1956:
1957: #FIXME needs to do something for /pub resources
1958: if (!$domain) { $domain=$ENV{'user.domain'}; }
1959: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1960: my $path=$perlvar{'lonDaemons'}.'/tmp';
1961: my %hash;
1962: if (tie(%hash,'GDBM_File',
1963: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1.256 albertel 1964: &GDBM_WRCREAT(),0640)) {
1.168 albertel 1965: foreach my $key (keys %hash) {
1.180 albertel 1966: if ($key=~ /:$symb/) {
1.168 albertel 1967: delete($hash{$key});
1968: }
1969: }
1970: }
1971: }
1972:
1.167 albertel 1973: sub tmpstore {
1.168 albertel 1974: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1975:
1976: if (!$symb) {
1977: $symb=&symbread();
1978: if (!$symb) { $symb= $ENV{'request.url'}; }
1979: }
1980: $symb=escape($symb);
1981:
1982: if (!$namespace) {
1983: # I don't think we would ever want to store this for a course.
1984: # it seems this will only be used if we don't have a course.
1985: #$namespace=$ENV{'request.course.id'};
1986: #if (!$namespace) {
1987: $namespace=$ENV{'request.state'};
1988: #}
1989: }
1990: $namespace=~s/\//\_/g;
1991: $namespace=~s/\W//g;
1992: #FIXME needs to do something for /pub resources
1993: if (!$domain) { $domain=$ENV{'user.domain'}; }
1994: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1995: my $now=time;
1996: my %hash;
1997: my $path=$perlvar{'lonDaemons'}.'/tmp';
1998: if (tie(%hash,'GDBM_File',
1999: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1.256 albertel 2000: &GDBM_WRCREAT(),0640)) {
1.168 albertel 2001: $hash{"version:$symb"}++;
2002: my $version=$hash{"version:$symb"};
2003: my $allkeys='';
2004: foreach my $key (keys(%$storehash)) {
2005: $allkeys.=$key.':';
2006: $hash{"$version:$symb:$key"}=$$storehash{$key};
2007: }
2008: $hash{"$version:$symb:timestamp"}=$now;
2009: $allkeys.='timestamp';
2010: $hash{"$version:keys:$symb"}=$allkeys;
2011: if (untie(%hash)) {
2012: return 'ok';
2013: } else {
2014: return "error:$!";
2015: }
2016: } else {
2017: return "error:$!";
2018: }
2019: }
1.167 albertel 2020:
1.168 albertel 2021: # -----------------------------------------------------------------Temp Restore
1.167 albertel 2022:
1.168 albertel 2023: sub tmprestore {
2024: my ($symb,$namespace,$domain,$stuname) = @_;
1.167 albertel 2025:
1.168 albertel 2026: if (!$symb) {
2027: $symb=&symbread();
2028: if (!$symb) { $symb= $ENV{'request.url'}; }
2029: }
2030: $symb=escape($symb);
2031:
2032: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2033: #FIXME needs to do something for /pub resources
2034: if (!$domain) { $domain=$ENV{'user.domain'}; }
2035: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2036:
2037: my %returnhash;
2038: $namespace=~s/\//\_/g;
2039: $namespace=~s/\W//g;
2040: my %hash;
2041: my $path=$perlvar{'lonDaemons'}.'/tmp';
2042: if (tie(%hash,'GDBM_File',
2043: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1.256 albertel 2044: &GDBM_READER(),0640)) {
1.168 albertel 2045: my $version=$hash{"version:$symb"};
2046: $returnhash{'version'}=$version;
2047: my $scope;
2048: for ($scope=1;$scope<=$version;$scope++) {
2049: my $vkeys=$hash{"$scope:keys:$symb"};
2050: my @keys=split(/:/,$vkeys);
2051: my $key;
2052: $returnhash{"$scope:keys"}=$vkeys;
2053: foreach $key (@keys) {
2054: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
2055: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1.167 albertel 2056: }
2057: }
1.168 albertel 2058: if (!(untie(%hash))) {
2059: return "error:$!";
2060: }
2061: } else {
2062: return "error:$!";
2063: }
2064: return %returnhash;
1.167 albertel 2065: }
2066:
1.9 www 2067: # ----------------------------------------------------------------------- Store
2068:
2069: sub store {
1.124 www 2070: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2071: my $home='';
2072:
1.168 albertel 2073: if ($stuname) { $home=&homeserver($stuname,$domain); }
1.124 www 2074:
1.213 www 2075: $symb=&symbclean($symb);
1.122 albertel 2076: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1.109 www 2077:
1.325 www 2078: if (!$domain) { $domain=$ENV{'user.domain'}; }
2079: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2080:
2081: &devalidate($symb,$stuname,$domain);
1.109 www 2082:
2083: $symb=escape($symb);
1.187 www 2084: if (!$namespace) {
2085: unless ($namespace=$ENV{'request.course.id'}) {
2086: return '';
2087: }
2088: }
1.122 albertel 2089: if (!$home) { $home=$ENV{'user.home'}; }
1.447 www 2090:
2091: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2092: $$storehash{'host'}=$perlvar{'lonHostID'};
2093:
1.12 www 2094: my $namevalue='';
1.191 harris41 2095: foreach (keys %$storehash) {
1.122 albertel 2096: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1.191 harris41 2097: }
1.12 www 2098: $namevalue=~s/\&$//;
1.187 www 2099: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1.124 www 2100: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1.9 www 2101: }
2102:
1.47 www 2103: # -------------------------------------------------------------- Critical Store
2104:
2105: sub cstore {
1.124 www 2106: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2107: my $home='';
2108:
1.168 albertel 2109: if ($stuname) { $home=&homeserver($stuname,$domain); }
1.124 www 2110:
1.213 www 2111: $symb=&symbclean($symb);
1.122 albertel 2112: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1.109 www 2113:
1.325 www 2114: if (!$domain) { $domain=$ENV{'user.domain'}; }
2115: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2116:
2117: &devalidate($symb,$stuname,$domain);
1.109 www 2118:
2119: $symb=escape($symb);
1.187 www 2120: if (!$namespace) {
2121: unless ($namespace=$ENV{'request.course.id'}) {
2122: return '';
2123: }
2124: }
1.122 albertel 2125: if (!$home) { $home=$ENV{'user.home'}; }
1.447 www 2126:
2127: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2128: $$storehash{'host'}=$perlvar{'lonHostID'};
1.122 albertel 2129:
1.47 www 2130: my $namevalue='';
1.191 harris41 2131: foreach (keys %$storehash) {
1.122 albertel 2132: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1.191 harris41 2133: }
1.47 www 2134: $namevalue=~s/\&$//;
1.187 www 2135: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1.188 www 2136: return critical
2137: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1.47 www 2138: }
2139:
1.9 www 2140: # --------------------------------------------------------------------- Restore
2141:
2142: sub restore {
1.124 www 2143: my ($symb,$namespace,$domain,$stuname) = @_;
2144: my $home='';
2145:
1.168 albertel 2146: if ($stuname) { $home=&homeserver($stuname,$domain); }
1.124 www 2147:
1.122 albertel 2148: if (!$symb) {
2149: unless ($symb=escape(&symbread())) { return ''; }
2150: } else {
1.213 www 2151: $symb=&escape(&symbclean($symb));
1.122 albertel 2152: }
1.188 www 2153: if (!$namespace) {
2154: unless ($namespace=$ENV{'request.course.id'}) {
2155: return '';
2156: }
2157: }
1.122 albertel 2158: if (!$domain) { $domain=$ENV{'user.domain'}; }
2159: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2160: if (!$home) { $home=$ENV{'user.home'}; }
2161: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2162:
1.12 www 2163: my %returnhash=();
1.191 harris41 2164: foreach (split(/\&/,$answer)) {
1.12 www 2165: my ($name,$value)=split(/\=/,$_);
2166: $returnhash{&unescape($name)}=&unescape($value);
1.191 harris41 2167: }
1.75 www 2168: my $version;
2169: for ($version=1;$version<=$returnhash{'version'};$version++) {
1.191 harris41 2170: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1.75 www 2171: $returnhash{$_}=$returnhash{$version.':'.$_};
1.191 harris41 2172: }
1.75 www 2173: }
1.13 www 2174: return %returnhash;
1.34 www 2175: }
2176:
2177: # ---------------------------------------------------------- Course Description
2178:
2179: sub coursedescription {
2180: my $courseid=shift;
2181: $courseid=~s/^\///;
1.49 www 2182: $courseid=~s/\_/\//g;
1.34 www 2183: my ($cdomain,$cnum)=split(/\//,$courseid);
1.129 albertel 2184: my $chome=&homeserver($cnum,$cdomain);
1.302 albertel 2185: my $normalid=$cdomain.'_'.$cnum;
2186: # need to always cache even if we get errors otherwise we keep
2187: # trying and trying and trying to get the course description.
2188: my %envhash=();
2189: my %returnhash=();
2190: $envhash{'course.'.$normalid.'.last_cache'}=time;
1.34 www 2191: if ($chome ne 'no_host') {
1.302 albertel 2192: %returnhash=&dump('environment',$cdomain,$cnum);
1.129 albertel 2193: if (!exists($returnhash{'con_lost'})) {
2194: $returnhash{'home'}= $chome;
2195: $returnhash{'domain'} = $cdomain;
2196: $returnhash{'num'} = $cnum;
1.130 albertel 2197: while (my ($name,$value) = each %returnhash) {
1.53 www 2198: $envhash{'course.'.$normalid.'.'.$name}=$value;
1.129 albertel 2199: }
1.270 www 2200: $returnhash{'url'}=&clutter($returnhash{'url'});
1.34 www 2201: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1.38 www 2202: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1.60 www 2203: $envhash{'course.'.$normalid.'.home'}=$chome;
2204: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2205: $envhash{'course.'.$normalid.'.num'}=$cnum;
1.34 www 2206: }
2207: }
1.302 albertel 2208: &appenv(%envhash);
2209: return %returnhash;
1.461 www 2210: }
2211:
2212: # -------------------------------------------------See if a user is privileged
2213:
2214: sub privileged {
2215: my ($username,$domain)=@_;
2216: my $rolesdump=&reply("dump:$domain:$username:roles",
2217: &homeserver($username,$domain));
2218: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2219: my $now=time;
2220: if ($rolesdump ne '') {
2221: foreach (split(/&/,$rolesdump)) {
2222: if ($_!~/^rolesdef\&/) {
2223: my ($area,$role)=split(/=/,$_);
2224: $area=~s/\_\w\w$//;
2225: my ($trole,$tend,$tstart)=split(/_/,$role);
2226: if (($trole eq 'dc') || ($trole eq 'su')) {
2227: my $active=1;
2228: if ($tend) {
2229: if ($tend<$now) { $active=0; }
2230: }
2231: if ($tstart) {
2232: if ($tstart>$now) { $active=0; }
2233: }
2234: if ($active) { return 1; }
2235: }
2236: }
2237: }
2238: }
2239: return 0;
1.9 www 2240: }
1.1 albertel 2241:
1.103 harris41 2242: # -------------------------------------------------------- Get user privileges
1.11 www 2243:
2244: sub rolesinit {
2245: my ($domain,$username,$authhost)=@_;
2246: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1.12 www 2247: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1.11 www 2248: my %allroles=();
2249: my %thesepriv=();
2250: my $now=time;
1.21 www 2251: my $userroles="user.login.time=$now\n";
1.11 www 2252: my $thesestr;
2253:
2254: if ($rolesdump ne '') {
1.191 harris41 2255: foreach (split(/&/,$rolesdump)) {
1.21 www 2256: if ($_!~/^rolesdef\&/) {
1.11 www 2257: my ($area,$role)=split(/=/,$_);
1.21 www 2258: $area=~s/\_\w\w$//;
1.11 www 2259: my ($trole,$tend,$tstart)=split(/_/,$role);
1.21 www 2260: $userroles.='user.role.'.$trole.'.'.$area.'='.
2261: $tstart.'.'.$tend."\n";
1.349 www 2262: # log the associated role with the area
2263: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
1.11 www 2264: if ($tend!=0) {
2265: if ($tend<$now) {
2266: $trole='';
2267: }
2268: }
2269: if ($tstart!=0) {
2270: if ($tstart>$now) {
2271: $trole='';
2272: }
2273: }
2274: if (($area ne '') && ($trole ne '')) {
1.347 albertel 2275: my $spec=$trole.'.'.$area;
2276: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2277: if ($trole =~ /^cr\//) {
2278: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1.392 www 2279: my $homsvr=homeserver($rauthor,$rdomain);
1.347 albertel 2280: if ($hostname{$homsvr} ne '') {
1.392 www 2281: my ($rdummy,$roledef)=
2282: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2283:
2284: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
1.347 albertel 2285: my ($syspriv,$dompriv,$coursepriv)=
1.392 www 2286: split(/\_/,$roledef);
1.347 albertel 2287: if (defined($syspriv)) {
2288: $allroles{'cm./'}.=':'.$syspriv;
2289: $allroles{$spec.'./'}.=':'.$syspriv;
2290: }
2291: if ($tdomain ne '') {
2292: if (defined($dompriv)) {
2293: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2294: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2295: }
2296: if ($trest ne '') {
2297: if (defined($coursepriv)) {
2298: $allroles{'cm.'.$area}.=':'.$coursepriv;
2299: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
2300: }
2301: }
2302: }
2303: }
2304: }
2305: } else {
2306: if (defined($pr{$trole.':s'})) {
2307: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
2308: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2309: }
2310: if ($tdomain ne '') {
2311: if (defined($pr{$trole.':d'})) {
2312: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2313: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2314: }
2315: if ($trest ne '') {
2316: if (defined($pr{$trole.':c'})) {
2317: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2318: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2319: }
2320: }
2321: }
2322: }
1.12 www 2323: }
2324: }
1.191 harris41 2325: }
1.125 www 2326: my $adv=0;
1.128 www 2327: my $author=0;
1.191 harris41 2328: foreach (keys %allroles) {
1.11 www 2329: %thesepriv=();
1.146 www 2330: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1.128 www 2331: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1.191 harris41 2332: foreach (split(/:/,$allroles{$_})) {
1.11 www 2333: if ($_ ne '') {
1.103 harris41 2334: my ($privilege,$restrictions)=split(/&/,$_);
1.11 www 2335: if ($restrictions eq '') {
1.103 harris41 2336: $thesepriv{$privilege}='F';
1.11 www 2337: } else {
1.103 harris41 2338: if ($thesepriv{$privilege} ne 'F') {
2339: $thesepriv{$privilege}.=$restrictions;
1.11 www 2340: }
2341: }
2342: }
1.191 harris41 2343: }
1.11 www 2344: $thesestr='';
1.191 harris41 2345: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1.11 www 2346: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1.191 harris41 2347: }
1.128 www 2348: $userroles.='user.adv='.$adv."\n".
2349: 'user.author='.$author."\n";
1.126 www 2350: $ENV{'user.adv'}=$adv;
1.11 www 2351: }
2352: return $userroles;
2353: }
2354:
1.12 www 2355: # --------------------------------------------------------------- get interface
2356:
2357: sub get {
1.131 albertel 2358: my ($namespace,$storearr,$udomain,$uname)=@_;
1.12 www 2359: my $items='';
1.191 harris41 2360: foreach (@$storearr) {
1.12 www 2361: $items.=escape($_).'&';
1.191 harris41 2362: }
1.12 www 2363: $items=~s/\&$//;
1.131 albertel 2364: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2365: if (!$uname) { $uname=$ENV{'user.name'}; }
2366: my $uhome=&homeserver($uname,$udomain);
2367:
1.133 albertel 2368: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1.15 www 2369: my @pairs=split(/\&/,$rep);
1.273 albertel 2370: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2371: return @pairs;
2372: }
1.15 www 2373: my %returnhash=();
1.42 www 2374: my $i=0;
1.191 harris41 2375: foreach (@$storearr) {
1.42 www 2376: $returnhash{$_}=unescape($pairs[$i]);
2377: $i++;
1.191 harris41 2378: }
1.15 www 2379: return %returnhash;
1.27 www 2380: }
2381:
2382: # --------------------------------------------------------------- del interface
2383:
2384: sub del {
1.133 albertel 2385: my ($namespace,$storearr,$udomain,$uname)=@_;
1.27 www 2386: my $items='';
1.191 harris41 2387: foreach (@$storearr) {
1.27 www 2388: $items.=escape($_).'&';
1.191 harris41 2389: }
1.27 www 2390: $items=~s/\&$//;
1.133 albertel 2391: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2392: if (!$uname) { $uname=$ENV{'user.name'}; }
2393: my $uhome=&homeserver($uname,$udomain);
2394:
2395: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1.15 www 2396: }
2397:
2398: # -------------------------------------------------------------- dump interface
2399:
2400: sub dump {
1.193 www 2401: my ($namespace,$udomain,$uname,$regexp)=@_;
1.129 albertel 2402: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2403: if (!$uname) { $uname=$ENV{'user.name'}; }
2404: my $uhome=&homeserver($uname,$udomain);
1.193 www 2405: if ($regexp) {
2406: $regexp=&escape($regexp);
2407: } else {
2408: $regexp='.';
2409: }
2410: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1.12 www 2411: my @pairs=split(/\&/,$rep);
2412: my %returnhash=();
1.191 harris41 2413: foreach (@pairs) {
1.12 www 2414: my ($key,$value)=split(/=/,$_);
1.29 www 2415: $returnhash{unescape($key)}=unescape($value);
1.318 matthew 2416: }
2417: return %returnhash;
1.407 www 2418: }
2419:
2420: # -------------------------------------------------------------- keys interface
2421:
2422: sub getkeys {
2423: my ($namespace,$udomain,$uname)=@_;
2424: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2425: if (!$uname) { $uname=$ENV{'user.name'}; }
2426: my $uhome=&homeserver($uname,$udomain);
2427: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2428: my @keyarray=();
2429: foreach (split(/\&/,$rep)) {
2430: push (@keyarray,&unescape($_));
2431: }
2432: return @keyarray;
1.318 matthew 2433: }
2434:
1.319 matthew 2435: # --------------------------------------------------------------- currentdump
2436: sub currentdump {
1.328 matthew 2437: my ($courseid,$sdom,$sname)=@_;
1.326 matthew 2438: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2439: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2440: $sname = $ENV{'user.name'} if (! defined($sname));
2441: my $uhome = &homeserver($sname,$sdom);
2442: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
1.318 matthew 2443: return if ($rep =~ /^(error:|no_such_host)/);
1.319 matthew 2444: #
1.318 matthew 2445: my %returnhash=();
1.319 matthew 2446: #
2447: if ($rep eq "unknown_cmd") {
2448: # an old lond will not know currentdump
2449: # Do a dump and make it look like a currentdump
1.326 matthew 2450: my @tmp = &dump($courseid,$sdom,$sname,'.');
1.319 matthew 2451: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2452: my %hash = @tmp;
2453: @tmp=();
1.424 matthew 2454: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
1.319 matthew 2455: } else {
2456: my @pairs=split(/\&/,$rep);
2457: foreach (@pairs) {
2458: my ($key,$value)=split(/=/,$_);
2459: my ($symb,$param) = split(/:/,$key);
2460: $returnhash{&unescape($symb)}->{&unescape($param)} =
2461: &unescape($value);
2462: }
1.191 harris41 2463: }
1.12 www 2464: return %returnhash;
1.424 matthew 2465: }
2466:
2467: sub convert_dump_to_currentdump{
2468: my %hash = %{shift()};
2469: my %returnhash;
2470: # Code ripped from lond, essentially. The only difference
2471: # here is the unescaping done by lonnet::dump(). Conceivably
2472: # we might run in to problems with parameter names =~ /^v\./
2473: while (my ($key,$value) = each(%hash)) {
2474: my ($v,$symb,$param) = split(/:/,$key);
2475: next if ($v eq 'version' || $symb eq 'keys');
2476: next if (exists($returnhash{$symb}) &&
2477: exists($returnhash{$symb}->{$param}) &&
2478: $returnhash{$symb}->{'v.'.$param} > $v);
2479: $returnhash{$symb}->{$param}=$value;
2480: $returnhash{$symb}->{'v.'.$param}=$v;
2481: }
2482: #
2483: # Remove all of the keys in the hashes which keep track of
2484: # the version of the parameter.
2485: while (my ($symb,$param_hash) = each(%returnhash)) {
2486: # use a foreach because we are going to delete from the hash.
2487: foreach my $key (keys(%$param_hash)) {
2488: delete($param_hash->{$key}) if ($key =~ /^v\./);
2489: }
2490: }
2491: return \%returnhash;
1.12 www 2492: }
2493:
1.449 matthew 2494: # --------------------------------------------------------------- inc interface
2495:
2496: sub inc {
2497: my ($namespace,$store,$udomain,$uname) = @_;
2498: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2499: if (!$uname) { $uname=$ENV{'user.name'}; }
2500: my $uhome=&homeserver($uname,$udomain);
2501: my $items='';
2502: if (! ref($store)) {
2503: # got a single value, so use that instead
2504: $items = &escape($store).'=&';
2505: } elsif (ref($store) eq 'SCALAR') {
2506: $items = &escape($$store).'=&';
2507: } elsif (ref($store) eq 'ARRAY') {
2508: $items = join('=&',map {&escape($_);} @{$store});
2509: } elsif (ref($store) eq 'HASH') {
2510: while (my($key,$value) = each(%{$store})) {
2511: $items.= &escape($key).'='.&escape($value).'&';
2512: }
2513: }
2514: $items=~s/\&$//;
2515: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2516: }
2517:
1.12 www 2518: # --------------------------------------------------------------- put interface
2519:
2520: sub put {
1.134 albertel 2521: my ($namespace,$storehash,$udomain,$uname)=@_;
2522: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2523: if (!$uname) { $uname=$ENV{'user.name'}; }
2524: my $uhome=&homeserver($uname,$udomain);
1.12 www 2525: my $items='';
1.191 harris41 2526: foreach (keys %$storehash) {
1.134 albertel 2527: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1.191 harris41 2528: }
1.12 www 2529: $items=~s/\&$//;
1.134 albertel 2530: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1.47 www 2531: }
2532:
2533: # ------------------------------------------------------ critical put interface
2534:
2535: sub cput {
1.134 albertel 2536: my ($namespace,$storehash,$udomain,$uname)=@_;
2537: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2538: if (!$uname) { $uname=$ENV{'user.name'}; }
2539: my $uhome=&homeserver($uname,$udomain);
1.47 www 2540: my $items='';
1.191 harris41 2541: foreach (keys %$storehash) {
1.134 albertel 2542: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1.191 harris41 2543: }
1.47 www 2544: $items=~s/\&$//;
1.134 albertel 2545: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1.12 www 2546: }
2547:
2548: # -------------------------------------------------------------- eget interface
2549:
2550: sub eget {
1.133 albertel 2551: my ($namespace,$storearr,$udomain,$uname)=@_;
1.12 www 2552: my $items='';
1.191 harris41 2553: foreach (@$storearr) {
1.12 www 2554: $items.=escape($_).'&';
1.191 harris41 2555: }
1.12 www 2556: $items=~s/\&$//;
1.133 albertel 2557: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2558: if (!$uname) { $uname=$ENV{'user.name'}; }
2559: my $uhome=&homeserver($uname,$udomain);
2560: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1.12 www 2561: my @pairs=split(/\&/,$rep);
2562: my %returnhash=();
1.42 www 2563: my $i=0;
1.191 harris41 2564: foreach (@$storearr) {
1.42 www 2565: $returnhash{$_}=unescape($pairs[$i]);
2566: $i++;
1.191 harris41 2567: }
1.12 www 2568: return %returnhash;
2569: }
2570:
1.341 www 2571: # ---------------------------------------------- Custom access rule evaluation
2572:
2573: sub customaccess {
2574: my ($priv,$uri)=@_;
1.342 www 2575: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
1.343 www 2576: $urealm=~s/^\W//;
2577: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
1.341 www 2578: my $access=0;
2579: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
1.342 www 2580: my ($effect,$realm,$role)=split(/\:/,$_);
1.343 www 2581: if ($role) {
2582: if ($role ne $urole) { next; }
2583: }
2584: foreach (split(/\s*\,\s*/,$realm)) {
2585: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2586: if ($tdom) {
2587: if ($tdom ne $udom) { next; }
2588: }
2589: if ($tcrs) {
2590: if ($tcrs ne $ucrs) { next; }
2591: }
2592: if ($tsec) {
2593: if ($tsec ne $usec) { next; }
2594: }
2595: $access=($effect eq 'allow');
2596: last;
1.342 www 2597: }
1.402 bowersj2 2598: if ($realm eq '' && $role eq '') {
2599: $access=($effect eq 'allow');
2600: }
1.341 www 2601: }
2602: return $access;
2603: }
2604:
1.103 harris41 2605: # ------------------------------------------------- Check for a user privilege
1.12 www 2606:
2607: sub allowed {
2608: my ($priv,$uri)=@_;
1.439 www 2609: $uri=&deversion($uri);
1.152 www 2610: my $orguri=$uri;
1.52 www 2611: $uri=&declutter($uri);
1.29 www 2612:
1.398 albertel 2613: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
1.54 www 2614: # Free bre access to adm and meta resources
1.29 www 2615:
1.54 www 2616: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1.14 www 2617: return 'F';
1.159 www 2618: }
2619:
2620: # Free bre to public access
2621:
2622: if ($priv eq 'bre') {
1.238 www 2623: my $copyright=&metadata($uri,'copyright');
1.301 www 2624: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2625: return 'F';
2626: }
1.238 www 2627: if ($copyright eq 'priv') {
2628: $uri=~/([^\/]+)\/([^\/]+)\//;
2629: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2630: return '';
2631: }
2632: }
2633: if ($copyright eq 'domain') {
2634: $uri=~/([^\/]+)\/([^\/]+)\//;
2635: unless (($ENV{'user.domain'} eq $1) ||
2636: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2637: return '';
2638: }
1.262 matthew 2639: }
2640: if ($ENV{'request.role'}=~ /li\.\//) {
2641: # Library role, so allow browsing of resources in this domain.
2642: return 'F';
1.238 www 2643: }
1.341 www 2644: if ($copyright eq 'custom') {
2645: unless (&customaccess($priv,$uri)) { return ''; }
2646: }
1.14 www 2647: }
1.264 matthew 2648: # Domain coordinator is trying to create a course
2649: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2650: # uri is the requested domain in this case.
2651: # comparison to 'request.role.domain' shows if the user has selected
2652: # a role of dc for the domain in question.
2653: return 'F' if ($uri eq $ENV{'request.role.domain'});
2654: }
1.29 www 2655:
1.52 www 2656: my $thisallowed='';
2657: my $statecond=0;
2658: my $courseprivid='';
2659:
2660: # Course
2661:
1.479 albertel 2662: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
1.52 www 2663: $thisallowed.=$1;
2664: }
1.29 www 2665:
1.52 www 2666: # Domain
2667:
2668: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1.479 albertel 2669: =~/\Q$priv\E\&([^\:]*)/) {
1.12 www 2670: $thisallowed.=$1;
2671: }
1.52 www 2672:
2673: # Course: uri itself is a course
1.66 www 2674: my $courseuri=$uri;
2675: $courseuri=~s/\_(\d)/\/$1/;
1.83 www 2676: $courseuri=~s/^([^\/])/\/$1/;
1.81 www 2677:
1.83 www 2678: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1.479 albertel 2679: =~/\Q$priv\E\&([^\:]*)/) {
1.12 www 2680: $thisallowed.=$1;
2681: }
1.29 www 2682:
1.314 www 2683: # URI is an uploaded document for this course
2684:
2685: if (($priv eq 'bre') &&
2686: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2687: return 'F';
2688: }
1.52 www 2689: # Full access at system, domain or course-wide level? Exit.
1.29 www 2690:
2691: if ($thisallowed=~/F/) {
2692: return 'F';
2693: }
2694:
1.52 www 2695: # If this is generating or modifying users, exit with special codes
1.29 www 2696:
1.479 albertel 2697: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:\Q$priv\E\:/) {
1.52 www 2698: return $thisallowed;
2699: }
2700: #
1.103 harris41 2701: # Gathered so far: system, domain and course wide privileges
1.52 www 2702: #
2703: # Course: See if uri or referer is an individual resource that is part of
2704: # the course
2705:
2706: if ($ENV{'request.course.id'}) {
1.232 www 2707:
1.52 www 2708: $courseprivid=$ENV{'request.course.id'};
2709: if ($ENV{'request.course.sec'}) {
2710: $courseprivid.='/'.$ENV{'request.course.sec'};
2711: }
2712: $courseprivid=~s/\_/\//;
2713: my $checkreferer=1;
1.232 www 2714: my ($match,$cond)=&is_on_map($uri);
2715: if ($match) {
2716: $statecond=$cond;
1.52 www 2717: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1.479 albertel 2718: =~/\Q$priv\E\&([^\:]*)/) {
1.52 www 2719: $thisallowed.=$1;
2720: $checkreferer=0;
2721: }
1.29 www 2722: }
1.83 www 2723:
1.148 www 2724: if ($checkreferer) {
1.152 www 2725: my $refuri=$ENV{'httpref.'.$orguri};
1.148 www 2726: unless ($refuri) {
1.191 harris41 2727: foreach (keys %ENV) {
1.148 www 2728: if ($_=~/^httpref\..*\*/) {
2729: my $pattern=$_;
1.156 www 2730: $pattern=~s/^httpref\.\/res\///;
1.148 www 2731: $pattern=~s/\*/\[\^\/\]\+/g;
2732: $pattern=~s/\//\\\//g;
1.152 www 2733: if ($orguri=~/$pattern/) {
1.148 www 2734: $refuri=$ENV{$_};
2735: }
2736: }
1.191 harris41 2737: }
1.148 www 2738: }
1.232 www 2739:
1.148 www 2740: if ($refuri) {
1.152 www 2741: $refuri=&declutter($refuri);
1.232 www 2742: my ($match,$cond)=&is_on_map($refuri);
2743: if ($match) {
2744: my $refstatecond=$cond;
1.52 www 2745: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1.479 albertel 2746: =~/\Q$priv\E\&([^\:]*)/) {
1.52 www 2747: $thisallowed.=$1;
1.53 www 2748: $uri=$refuri;
2749: $statecond=$refstatecond;
1.52 www 2750: }
2751: }
1.148 www 2752: }
1.29 www 2753: }
1.52 www 2754: }
1.29 www 2755:
1.52 www 2756: #
1.103 harris41 2757: # Gathered now: all privileges that could apply, and condition number
1.52 www 2758: #
2759: #
2760: # Full or no access?
2761: #
1.29 www 2762:
1.52 www 2763: if ($thisallowed=~/F/) {
2764: return 'F';
2765: }
1.29 www 2766:
1.52 www 2767: unless ($thisallowed) {
2768: return '';
2769: }
1.29 www 2770:
1.52 www 2771: # Restrictions exist, deal with them
2772: #
2773: # C:according to course preferences
2774: # R:according to resource settings
2775: # L:unless locked
2776: # X:according to user session state
2777: #
2778:
2779: # Possibly locked functionality, check all courses
1.54 www 2780: # Locks might take effect only after 10 minutes cache expiration for other
2781: # courses, and 2 minutes for current course
1.52 www 2782:
2783: my $envkey;
2784: if ($thisallowed=~/L/) {
2785: foreach $envkey (keys %ENV) {
1.54 www 2786: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2787: my $courseid=$2;
2788: my $roleid=$1.'.'.$2;
1.92 www 2789: $courseid=~s/^\///;
1.54 www 2790: my $expiretime=600;
2791: if ($ENV{'request.role'} eq $roleid) {
2792: $expiretime=120;
2793: }
2794: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2795: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2796: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2797: &coursedescription($courseid);
2798: }
1.479 albertel 2799: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
1.54 www 2800: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2801: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1.57 www 2802: &log($ENV{'user.domain'},$ENV{'user.name'},
1.239 www 2803: $ENV{'user.home'},
1.57 www 2804: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1.52 www 2805: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1.54 www 2806: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1.52 www 2807: return '';
2808: }
2809: }
1.479 albertel 2810: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
1.54 www 2811: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2812: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1.57 www 2813: &log($ENV{'user.domain'},$ENV{'user.name'},
1.239 www 2814: $ENV{'user.home'},
1.57 www 2815: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1.52 www 2816: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1.54 www 2817: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1.52 www 2818: return '';
2819: }
2820: }
2821: }
1.29 www 2822: }
1.52 www 2823: }
2824:
2825: #
2826: # Rest of the restrictions depend on selected course
2827: #
2828:
2829: unless ($ENV{'request.course.id'}) {
2830: return '1';
2831: }
1.29 www 2832:
1.52 www 2833: #
2834: # Now user is definitely in a course
2835: #
1.53 www 2836:
2837:
2838: # Course preferences
2839:
2840: if ($thisallowed=~/C/) {
1.54 www 2841: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1.237 www 2842: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
1.54 www 2843: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1.479 albertel 2844: =~/\Q$rolecode\E/) {
1.57 www 2845: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2846: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1.237 www 2847: $ENV{'request.course.id'});
2848: return '';
2849: }
2850:
2851: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
1.479 albertel 2852: =~/\Q$unamedom\E/) {
1.237 www 2853: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2854: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
1.54 www 2855: $ENV{'request.course.id'});
2856: return '';
2857: }
1.53 www 2858: }
2859:
2860: # Resource preferences
2861:
2862: if ($thisallowed=~/R/) {
1.54 www 2863: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1.479 albertel 2864: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
1.341 www 2865: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1.57 www 2866: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1.341 www 2867: return '';
1.54 www 2868: }
1.53 www 2869: }
1.30 www 2870:
1.246 www 2871: # Restricted by state or randomout?
1.30 www 2872:
1.52 www 2873: if ($thisallowed=~/X/) {
1.247 www 2874: if ($ENV{'acc.randomout'}) {
1.249 www 2875: my $symb=&symbread($uri,1);
1.479 albertel 2876: if (($symb) && ($ENV{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
1.248 www 2877: return '';
2878: }
1.247 www 2879: }
2880: if (&condval($statecond)) {
1.52 www 2881: return '2';
2882: } else {
2883: return '';
2884: }
2885: }
1.30 www 2886:
1.52 www 2887: return 'F';
1.232 www 2888: }
2889:
2890: # --------------------------------------------------- Is a resource on the map?
2891:
2892: sub is_on_map {
2893: my $uri=&declutter(shift);
1.435 www 2894: $uri=~s/\.\d+\.(\w+)$/\.$1/;
1.232 www 2895: my @uriparts=split(/\//,$uri);
2896: my $filename=$uriparts[$#uriparts];
2897: my $pathname=$uri;
1.289 bowersj2 2898: $pathname=~s|/\Q$filename\E$||;
1.332 www 2899: $pathname=~s/^adm\/wrapper\///;
1.289 bowersj2 2900: #Trying to find the conditional for the file
1.232 www 2901: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1.289 bowersj2 2902: /\&\Q$filename\E\:([\d\|]+)\&/);
1.232 www 2903: if ($match) {
1.289 bowersj2 2904: return (1,$1);
2905: } else {
1.434 www 2906: return (0,0);
1.289 bowersj2 2907: }
1.12 www 2908: }
2909:
1.427 www 2910: # --------------------------------------------------------- Get symb from alias
2911:
2912: sub get_symb_from_alias {
2913: my $symb=shift;
2914: my ($map,$resid,$url)=&decode_symb($symb);
2915: # Already is a symb
2916: if ($url) { return $symb; }
2917: # Must be an alias
2918: my $aliassymb='';
2919: my %bighash;
2920: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2921: &GDBM_READER(),0640)) {
2922: my $rid=$bighash{'mapalias_'.$symb};
2923: if ($rid) {
2924: my ($mapid,$resid)=split(/\./,$rid);
1.429 albertel 2925: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
2926: $resid,$bighash{'src_'.$rid});
1.427 www 2927: }
2928: untie %bighash;
2929: }
2930: return $aliassymb;
2931: }
2932:
1.12 www 2933: # ----------------------------------------------------------------- Define Role
2934:
2935: sub definerole {
2936: if (allowed('mcr','/')) {
2937: my ($rolename,$sysrole,$domrole,$courole)=@_;
1.392 www 2938: foreach (split(':',$sysrole)) {
1.21 www 2939: my ($crole,$cqual)=split(/\&/,$_);
1.479 albertel 2940: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
2941: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
2942: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
1.21 www 2943: return "refused:s:$crole&$cqual";
2944: }
2945: }
1.191 harris41 2946: }
1.392 www 2947: foreach (split(':',$domrole)) {
1.21 www 2948: my ($crole,$cqual)=split(/\&/,$_);
1.479 albertel 2949: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
2950: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
2951: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
1.21 www 2952: return "refused:d:$crole&$cqual";
2953: }
2954: }
1.191 harris41 2955: }
1.392 www 2956: foreach (split(':',$courole)) {
1.21 www 2957: my ($crole,$cqual)=split(/\&/,$_);
1.479 albertel 2958: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
2959: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
2960: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
1.21 www 2961: return "refused:c:$crole&$cqual";
2962: }
2963: }
1.191 harris41 2964: }
1.12 www 2965: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2966: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1.21 www 2967: "rolesdef_$rolename=".
2968: escape($sysrole.'_'.$domrole.'_'.$courole);
1.12 www 2969: return reply($command,$ENV{'user.home'});
2970: } else {
2971: return 'refused';
2972: }
1.105 harris41 2973: }
2974:
2975: # ---------------- Make a metadata query against the network of library servers
2976:
2977: sub metadata_query {
1.244 matthew 2978: my ($query,$custom,$customshow,$server_array)=@_;
1.120 harris41 2979: my %rhash;
1.244 matthew 2980: my @server_list = (defined($server_array) ? @$server_array
2981: : keys(%libserv) );
2982: for my $server (@server_list) {
1.118 harris41 2983: unless ($custom or $customshow) {
2984: my $reply=&reply("querysend:".&escape($query),$server);
2985: $rhash{$server}=$reply;
2986: }
2987: else {
2988: my $reply=&reply("querysend:".&escape($query).':'.
2989: &escape($custom).':'.&escape($customshow),
2990: $server);
2991: $rhash{$server}=$reply;
2992: }
1.112 harris41 2993: }
1.118 harris41 2994: return \%rhash;
1.240 www 2995: }
2996:
2997: # ----------------------------------------- Send log queries and wait for reply
2998:
2999: sub log_query {
3000: my ($uname,$udom,$query,%filters)=@_;
3001: my $uhome=&homeserver($uname,$udom);
3002: if ($uhome eq 'no_host') { return 'error: no_host'; }
3003: my $uhost=$hostname{$uhome};
1.241 www 3004: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
1.240 www 3005: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3006: $uhome);
1.479 albertel 3007: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
1.242 www 3008: return get_query_reply($queryid);
3009: }
3010:
3011: sub get_query_reply {
3012: my $queryid=shift;
1.240 www 3013: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3014: my $reply='';
3015: for (1..100) {
3016: sleep 2;
3017: if (-e $replyfile.'.end') {
1.448 albertel 3018: if (open(my $fh,$replyfile)) {
1.240 www 3019: $reply.=<$fh>;
1.448 albertel 3020: close($fh);
1.240 www 3021: } else { return 'error: reply_file_error'; }
1.242 www 3022: return &unescape($reply);
3023: }
1.240 www 3024: }
1.242 www 3025: return 'timeout:'.$queryid;
1.240 www 3026: }
3027:
3028: sub courselog_query {
1.241 www 3029: #
3030: # possible filters:
3031: # url: url or symb
3032: # username
3033: # domain
3034: # action: view, submit, grade
3035: # start: timestamp
3036: # end: timestamp
3037: #
1.240 www 3038: my (%filters)=@_;
3039: unless ($ENV{'request.course.id'}) { return 'no_course'; }
1.241 www 3040: if ($filters{'url'}) {
3041: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3042: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3043: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3044: }
1.240 www 3045: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
3046: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
3047: return &log_query($cname,$cdom,'courselog',%filters);
3048: }
3049:
3050: sub userlog_query {
3051: my ($uname,$udom,%filters)=@_;
3052: return &log_query($uname,$udom,'userlog',%filters);
1.12 www 3053: }
3054:
3055: # ------------------------------------------------------------------ Plain Text
3056:
3057: sub plaintext {
1.22 www 3058: my $short=shift;
1.414 www 3059: return &mt($prp{$short});
1.12 www 3060: }
3061:
3062: # ----------------------------------------------------------------- Assign Role
3063:
3064: sub assignrole {
1.357 www 3065: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
1.21 www 3066: my $mrole;
3067: if ($role =~ /^cr\//) {
1.393 www 3068: my $cwosec=$url;
3069: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3070: unless (&allowed('ccr',$cwosec)) {
1.104 www 3071: &logthis('Refused custom assignrole: '.
3072: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3073: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3074: return 'refused';
3075: }
1.21 www 3076: $mrole='cr';
3077: } else {
1.82 www 3078: my $cwosec=$url;
1.83 www 3079: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1.373 www 3080: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
1.104 www 3081: &logthis('Refused assignrole: '.
3082: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3083: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3084: return 'refused';
3085: }
1.21 www 3086: $mrole=$role;
3087: }
3088: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3089: "$udom:$uname:$url".'_'."$mrole=$role";
1.81 www 3090: if ($end) { $command.='_'.$end; }
1.21 www 3091: if ($start) {
3092: if ($end) {
1.81 www 3093: $command.='_'.$start;
1.21 www 3094: } else {
1.81 www 3095: $command.='_0_'.$start;
1.21 www 3096: }
3097: }
1.357 www 3098: # actually delete
3099: if ($deleteflag) {
1.373 www 3100: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
1.357 www 3101: # modify command to delete the role
3102: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
3103: "$udom:$uname:$url".'_'."$mrole";
1.373 www 3104: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
1.357 www 3105: # set start and finish to negative values for userrolelog
3106: $start=-1;
3107: $end=-1;
3108: }
3109: }
3110: # send command
1.349 www 3111: my $answer=&reply($command,&homeserver($uname,$udom));
1.357 www 3112: # log new user role if status is ok
1.349 www 3113: if ($answer eq 'ok') {
3114: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
3115: }
3116: return $answer;
1.169 harris41 3117: }
3118:
3119: # -------------------------------------------------- Modify user authentication
1.197 www 3120: # Overrides without validation
3121:
1.169 harris41 3122: sub modifyuserauth {
3123: my ($udom,$uname,$umode,$upass)=@_;
3124: my $uhome=&homeserver($uname,$udom);
1.197 www 3125: unless (&allowed('mau',$udom)) { return 'refused'; }
3126: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
1.272 matthew 3127: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3128: ' in domain '.$ENV{'request.role.domain'});
1.169 harris41 3129: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3130: &escape($upass),$uhome);
1.197 www 3131: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
3132: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3133: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3134: &log($udom,,$uname,$uhome,
3135: 'Authentication changed by '.$ENV{'user.domain'}.', '.
3136: $ENV{'user.name'}.', '.$umode.
3137: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
1.169 harris41 3138: unless ($reply eq 'ok') {
1.197 www 3139: &logthis('Authentication mode error: '.$reply);
1.169 harris41 3140: return 'error: '.$reply;
3141: }
1.170 harris41 3142: return 'ok';
1.80 www 3143: }
3144:
1.81 www 3145: # --------------------------------------------------------------- Modify a user
1.80 www 3146:
1.81 www 3147: sub modifyuser {
1.206 matthew 3148: my ($udom, $uname, $uid,
3149: $umode, $upass, $first,
3150: $middle, $last, $gene,
1.387 www 3151: $forceid, $desiredhome, $email)=@_;
1.198 www 3152: $udom=~s/\W//g;
3153: $uname=~s/\W//g;
1.81 www 3154: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1.80 www 3155: $umode.', '.$first.', '.$middle.', '.
1.206 matthew 3156: $last.', '.$gene.'(forceid: '.$forceid.')'.
3157: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3158: ' desiredhome not specified').
1.272 matthew 3159: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3160: ' in domain '.$ENV{'request.role.domain'});
1.230 stredwic 3161: my $uhome=&homeserver($uname,$udom,'true');
1.80 www 3162: # ----------------------------------------------------------------- Create User
1.406 albertel 3163: if (($uhome eq 'no_host') &&
3164: (($umode && $upass) || ($umode eq 'localauth'))) {
1.80 www 3165: my $unhome='';
1.209 matthew 3166: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3167: $unhome = $desiredhome;
3168: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1.80 www 3169: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1.209 matthew 3170: } else { # load balancing routine for determining $unhome
1.80 www 3171: my $tryserver;
1.81 www 3172: my $loadm=10000000;
1.80 www 3173: foreach $tryserver (keys %libserv) {
3174: if ($hostdom{$tryserver} eq $udom) {
3175: my $answer=reply('load',$tryserver);
3176: if (($answer=~/\d+/) && ($answer<$loadm)) {
3177: $loadm=$answer;
3178: $unhome=$tryserver;
3179: }
3180: }
3181: }
3182: }
3183: if (($unhome eq '') || ($unhome eq 'no_host')) {
1.206 matthew 3184: return 'error: unable to find a home server for '.$uname.
3185: ' in domain '.$udom;
1.80 www 3186: }
3187: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3188: &escape($upass),$unhome);
3189: unless ($reply eq 'ok') {
3190: return 'error: '.$reply;
3191: }
1.230 stredwic 3192: $uhome=&homeserver($uname,$udom,'true');
1.80 www 3193: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1.386 matthew 3194: return 'error: unable verify users home machine.';
1.80 www 3195: }
1.209 matthew 3196: } # End of creation of new user
1.80 www 3197: # ---------------------------------------------------------------------- Add ID
3198: if ($uid) {
3199: $uid=~tr/A-Z/a-z/;
3200: my %uidhash=&idrget($udom,$uname);
1.196 www 3201: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3202: && (!$forceid)) {
1.80 www 3203: unless ($uid eq $uidhash{$uname}) {
1.386 matthew 3204: return 'error: user id "'.$uid.'" does not match '.
3205: 'current user id "'.$uidhash{$uname}.'".';
1.80 www 3206: }
3207: } else {
3208: &idput($udom,($uname => $uid));
3209: }
3210: }
3211: # -------------------------------------------------------------- Add names, etc
1.313 matthew 3212: my @tmp=&get('environment',
1.134 albertel 3213: ['firstname','middlename','lastname','generation'],
3214: $udom,$uname);
1.313 matthew 3215: my %names;
3216: if ($tmp[0] =~ m/^error:.*/) {
3217: %names=();
3218: } else {
3219: %names = @tmp;
3220: }
1.388 www 3221: #
3222: # Make sure to not trash student environment if instructor does not bother
3223: # to supply name and email information
3224: #
3225: if ($first) { $names{'firstname'} = $first; }
1.385 matthew 3226: if (defined($middle)) { $names{'middlename'} = $middle; }
1.388 www 3227: if ($last) { $names{'lastname'} = $last; }
1.385 matthew 3228: if (defined($gene)) { $names{'generation'} = $gene; }
1.388 www 3229: if ($email) { $names{'notification'} = $email;
3230: $names{'critnotification'} = $email; }
1.387 www 3231:
1.134 albertel 3232: my $reply = &put('environment', \%names, $udom,$uname);
3233: if ($reply ne 'ok') { return 'error: '.$reply; }
1.81 www 3234: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1.80 www 3235: $umode.', '.$first.', '.$middle.', '.
3236: $last.', '.$gene.' by '.
3237: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1.134 albertel 3238: return 'ok';
1.80 www 3239: }
3240:
1.81 www 3241: # -------------------------------------------------------------- Modify student
1.80 www 3242:
1.81 www 3243: sub modifystudent {
3244: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1.455 albertel 3245: $end,$start,$forceid,$desiredhome,$email,$type,$cid)=@_;
3246: if (!$cid) {
3247: unless ($cid=$ENV{'request.course.id'}) {
3248: return 'not_in_class';
3249: }
1.80 www 3250: }
3251: # --------------------------------------------------------------- Make the user
1.81 www 3252: my $reply=&modifyuser
1.209 matthew 3253: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
1.387 www 3254: $desiredhome,$email);
1.80 www 3255: unless ($reply eq 'ok') { return $reply; }
1.297 matthew 3256: # This will cause &modify_student_enrollment to get the uid from the
3257: # students environment
3258: $uid = undef if (!$forceid);
1.455 albertel 3259: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
3260: $gene,$usec,$end,$start,$type,$cid);
1.297 matthew 3261: return $reply;
3262: }
3263:
3264: sub modify_student_enrollment {
1.455 albertel 3265: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,
3266: $cid) = @_;
3267: my ($cdom,$cnum,$chome);
3268: if (!$cid) {
3269: unless ($cid=$ENV{'request.course.id'}) {
3270: return 'not_in_class';
3271: }
3272: $cdom=$ENV{'course.'.$cid.'.domain'};
3273: $cnum=$ENV{'course.'.$cid.'.num'};
3274: } else {
3275: ($cdom,$cnum)=split(/_/,$cid);
3276: }
3277: $chome=$ENV{'course.'.$cid.'.home'};
3278: if (!$chome) {
1.457 raeburn 3279: $chome=&homeserver($cnum,$cdom);
1.297 matthew 3280: }
1.455 albertel 3281: if (!$chome) { return 'unknown_course'; }
1.297 matthew 3282: # Make sure the user exists
1.81 www 3283: my $uhome=&homeserver($uname,$udom);
3284: if (($uhome eq '') || ($uhome eq 'no_host')) {
3285: return 'error: no such user';
3286: }
1.297 matthew 3287: # Get student data if we were not given enough information
3288: if (!defined($first) || $first eq '' ||
3289: !defined($last) || $last eq '' ||
3290: !defined($uid) || $uid eq '' ||
3291: !defined($middle) || $middle eq '' ||
3292: !defined($gene) || $gene eq '') {
1.294 matthew 3293: # They did not supply us with enough data to enroll the student, so
3294: # we need to pick up more information.
1.297 matthew 3295: my %tmp = &get('environment',
1.294 matthew 3296: ['firstname','middlename','lastname', 'generation','id']
1.297 matthew 3297: ,$udom,$uname);
3298:
1.455 albertel 3299: #foreach (keys(%tmp)) {
3300: # &logthis("key $_ = ".$tmp{$_});
3301: #}
1.294 matthew 3302: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3303: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3304: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
1.297 matthew 3305: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
1.294 matthew 3306: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3307: }
3308: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
3309: $first,$middle);
1.487 ! albertel 3310: my $reply=cput('classlist',
! 3311: {"$uname:$udom" =>
! 3312: join(':',$end,$start,$uid,$usec,$fullname,$type) },
! 3313: $cdom,$cnum);
1.81 www 3314: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3315: return 'error: '.$reply;
3316: }
1.297 matthew 3317: # Add student role to user
1.83 www 3318: my $uurl='/'.$cid;
1.81 www 3319: $uurl=~s/\_/\//g;
3320: if ($usec) {
3321: $uurl.='/'.$usec;
3322: }
3323: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1.21 www 3324: }
3325:
1.84 www 3326: # ------------------------------------------------- Write to course preferences
3327:
3328: sub writecoursepref {
3329: my ($courseid,%prefs)=@_;
3330: $courseid=~s/^\///;
3331: $courseid=~s/\_/\//g;
3332: my ($cdomain,$cnum)=split(/\//,$courseid);
3333: my $chome=homeserver($cnum,$cdomain);
3334: if (($chome eq '') || ($chome eq 'no_host')) {
3335: return 'error: no such course';
3336: }
3337: my $cstring='';
1.191 harris41 3338: foreach (keys %prefs) {
1.84 www 3339: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1.191 harris41 3340: }
1.84 www 3341: $cstring=~s/\&$//;
3342: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3343: }
3344:
3345: # ---------------------------------------------------------- Make/modify course
3346:
3347: sub createcourse {
1.271 www 3348: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
1.84 www 3349: $url=&declutter($url);
3350: my $cid='';
1.264 matthew 3351: unless (&allowed('ccc',$udom)) {
1.84 www 3352: return 'refused';
3353: }
3354: # ------------------------------------------------------------------- Create ID
3355: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3356: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3357: # ----------------------------------------------- Make sure that does not exist
1.230 stredwic 3358: my $uhome=&homeserver($uname,$udom,'true');
1.84 www 3359: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3360: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3361: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1.230 stredwic 3362: $uhome=&homeserver($uname,$udom,'true');
1.84 www 3363: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3364: return 'error: unable to generate unique course-ID';
3365: }
3366: }
1.264 matthew 3367: # ------------------------------------------------ Check supplied server name
3368: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3369: if (! exists($libserv{$course_server})) {
3370: return 'error:bad server name '.$course_server;
3371: }
1.84 www 3372: # ------------------------------------------------------------- Make the course
3373: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1.264 matthew 3374: $course_server);
1.84 www 3375: unless ($reply eq 'ok') { return 'error: '.$reply; }
1.230 stredwic 3376: $uhome=&homeserver($uname,$udom,'true');
1.84 www 3377: if (($uhome eq '') || ($uhome eq 'no_host')) {
3378: return 'error: no such course';
3379: }
1.271 www 3380: # ----------------------------------------------------------------- Course made
1.358 www 3381: # log existance
3382: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description),
3383: $uhome);
3384: &flushcourselogs();
3385: # set toplevel url
1.271 www 3386: my $topurl=$url;
3387: unless ($nonstandard) {
3388: # ------------------------------------------ For standard courses, make top url
3389: my $mapurl=&clutter($url);
1.278 www 3390: if ($mapurl eq '/res/') { $mapurl=''; }
1.271 www 3391: $ENV{'form.initmap'}=(<<ENDINITMAP);
3392: <map>
3393: <resource id="1" type="start"></resource>
3394: <resource id="2" src="$mapurl"></resource>
3395: <resource id="3" type="finish"></resource>
3396: <link index="1" from="1" to="2"></link>
3397: <link index="2" from="2" to="3"></link>
3398: </map>
3399: ENDINITMAP
3400: $topurl=&declutter(
3401: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3402: );
3403: }
3404: # ----------------------------------------------------------- Write preferences
1.84 www 3405: &writecoursepref($udom.'_'.$uname,
3406: ('description' => $description,
1.271 www 3407: 'url' => $topurl));
1.84 www 3408: return '/'.$udom.'/'.$uname;
3409: }
3410:
1.21 www 3411: # ---------------------------------------------------------- Assign Custom Role
3412:
3413: sub assigncustomrole {
1.357 www 3414: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
1.21 www 3415: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1.357 www 3416: $end,$start,$deleteflag);
1.21 www 3417: }
3418:
3419: # ----------------------------------------------------------------- Revoke Role
3420:
3421: sub revokerole {
1.357 www 3422: my ($udom,$uname,$url,$role,$deleteflag)=@_;
1.21 www 3423: my $now=time;
1.357 www 3424: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
1.21 www 3425: }
3426:
3427: # ---------------------------------------------------------- Revoke Custom Role
3428:
3429: sub revokecustomrole {
1.357 www 3430: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
1.21 www 3431: my $now=time;
1.357 www 3432: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3433: $deleteflag);
1.17 www 3434: }
3435:
3436: # ------------------------------------------------------------ Directory lister
3437:
3438: sub dirlist {
1.253 stredwic 3439: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3440:
1.18 www 3441: $uri=~s/^\///;
3442: $uri=~s/\/$//;
1.253 stredwic 3443: my ($udom, $uname);
3444: (undef,$udom,$uname)=split(/\//,$uri);
3445: if(defined($userdomain)) {
3446: $udom = $userdomain;
3447: }
3448: if(defined($username)) {
3449: $uname = $username;
3450: }
3451:
3452: my $dirRoot = $perlvar{'lonDocRoot'};
3453: if(defined($alternateDirectoryRoot)) {
3454: $dirRoot = $alternateDirectoryRoot;
3455: $dirRoot =~ s/\/$//;
3456: }
3457:
3458: if($udom) {
3459: if($uname) {
3460: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
3461: homeserver($uname,$udom));
3462: return split(/:/,$listing);
3463: } elsif(!defined($alternateDirectoryRoot)) {
3464: my $tryserver;
3465: my %allusers=();
3466: foreach $tryserver (keys %libserv) {
3467: if($hostdom{$tryserver} eq $udom) {
3468: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3469: $udom, $tryserver);
3470: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
3471: && ($listing ne 'con_lost')) {
3472: foreach (split(/:/,$listing)) {
3473: my ($entry,@stat)=split(/&/,$_);
3474: $allusers{$entry}=1;
3475: }
3476: }
1.191 harris41 3477: }
1.253 stredwic 3478: }
3479: my $alluserstr='';
3480: foreach (sort keys %allusers) {
3481: $alluserstr.=$_.'&user:';
3482: }
3483: $alluserstr=~s/:$//;
3484: return split(/:/,$alluserstr);
3485: } else {
3486: my @emptyResults = ();
3487: push(@emptyResults, 'missing user name');
3488: return split(':',@emptyResults);
3489: }
3490: } elsif(!defined($alternateDirectoryRoot)) {
3491: my $tryserver;
3492: my %alldom=();
3493: foreach $tryserver (keys %libserv) {
3494: $alldom{$hostdom{$tryserver}}=1;
3495: }
3496: my $alldomstr='';
3497: foreach (sort keys %alldom) {
1.397 albertel 3498: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
1.253 stredwic 3499: }
3500: $alldomstr=~s/:$//;
3501: return split(/:/,$alldomstr);
3502: } else {
3503: my @emptyResults = ();
3504: push(@emptyResults, 'missing domain');
3505: return split(':',@emptyResults);
1.275 stredwic 3506: }
3507: }
3508:
3509: # --------------------------------------------- GetFileTimestamp
3510: # This function utilizes dirlist and returns the date stamp for
3511: # when it was last modified. It will also return an error of -1
3512: # if an error occurs
3513:
1.410 matthew 3514: ##
3515: ## FIXME: This subroutine assumes its caller knows something about the
3516: ## directory structure of the home server for the student ($root).
3517: ## Not a good assumption to make. Since this is for looking up files
3518: ## in user directories, the full path should be constructed by lond, not
3519: ## whatever machine we request data from.
3520: ##
1.275 stredwic 3521: sub GetFileTimestamp {
3522: my ($studentDomain,$studentName,$filename,$root)=@_;
3523: $studentDomain=~s/\W//g;
3524: $studentName=~s/\W//g;
3525: my $subdir=$studentName.'__';
3526: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3527: my $proname="$studentDomain/$subdir/$studentName";
3528: $proname .= '/'.$filename;
1.375 matthew 3529: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
3530: $studentName, $root);
1.275 stredwic 3531: my @stats = split('&', $fileStat);
3532: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
1.375 matthew 3533: # @stats contains first the filename, then the stat output
3534: return $stats[10]; # so this is 10 instead of 9.
1.275 stredwic 3535: } else {
3536: return -1;
1.253 stredwic 3537: }
1.26 www 3538: }
3539:
3540: # -------------------------------------------------------- Value of a Condition
3541:
1.40 www 3542: sub directcondval {
3543: my $number=shift;
3544: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
3545: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
3546: } else {
3547: return 2;
3548: }
3549: }
3550:
1.26 www 3551: sub condval {
3552: my $condidx=shift;
3553: my $result=0;
1.54 www 3554: my $allpathcond='';
1.191 harris41 3555: foreach (split(/\|/,$condidx)) {
1.54 www 3556: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
3557: $allpathcond.=
3558: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
3559: }
1.191 harris41 3560: }
1.54 www 3561: $allpathcond=~s/\|$//;
1.33 www 3562: if ($ENV{'request.course.id'}) {
1.54 www 3563: if ($allpathcond) {
1.26 www 3564: my $operand='|';
3565: my @stack;
1.191 harris41 3566: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
1.26 www 3567: if ($_ eq '(') {
3568: push @stack,($operand,$result)
3569: } elsif ($_ eq ')') {
3570: my $before=pop @stack;
3571: if (pop @stack eq '&') {
3572: $result=$result>$before?$before:$result;
3573: } else {
3574: $result=$result>$before?$result:$before;
3575: }
3576: } elsif (($_ eq '&') || ($_ eq '|')) {
3577: $operand=$_;
3578: } else {
1.40 www 3579: my $new=directcondval($_);
1.26 www 3580: if ($operand eq '&') {
3581: $result=$result>$new?$new:$result;
3582: } else {
3583: $result=$result>$new?$result:$new;
1.191 harris41 3584: }
1.26 www 3585: }
1.191 harris41 3586: }
1.26 www 3587: }
3588: }
3589: return $result;
1.421 albertel 3590: }
3591:
3592: # ---------------------------------------------------- Devalidate courseresdata
3593:
3594: sub devalidatecourseresdata {
3595: my ($coursenum,$coursedomain)=@_;
3596: my $hashid=$coursenum.':'.$coursedomain;
1.428 albertel 3597: &devalidate_cache(\%courseresdatacache,$hashid,'courseres');
1.28 www 3598: }
3599:
1.200 www 3600: # --------------------------------------------------- Course Resourcedata Query
3601:
3602: sub courseresdata {
3603: my ($coursenum,$coursedomain,@which)=@_;
3604: my $coursehom=&homeserver($coursenum,$coursedomain);
3605: my $hashid=$coursenum.':'.$coursedomain;
1.425 albertel 3606: my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid,'courseres');
1.417 albertel 3607: unless (defined($cached)) {
1.251 albertel 3608: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
1.417 albertel 3609: $result=\%dumpreply;
1.251 albertel 3610: my ($tmp) = keys(%dumpreply);
3611: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
1.425 albertel 3612: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
1.306 albertel 3613: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3614: return $tmp;
1.416 albertel 3615: } elsif ($tmp =~ /^(error)/) {
1.417 albertel 3616: $result=undef;
1.425 albertel 3617: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
1.250 albertel 3618: }
3619: }
1.251 albertel 3620: foreach my $item (@which) {
1.417 albertel 3621: if (defined($result->{$item})) {
3622: return $result->{$item};
1.251 albertel 3623: }
1.250 albertel 3624: }
1.291 albertel 3625: return undef;
1.200 www 3626: }
3627:
1.379 matthew 3628: #
3629: # EXT resource caching routines
3630: #
3631:
3632: sub clear_EXT_cache_status {
1.383 albertel 3633: &delenv('cache.EXT.');
1.379 matthew 3634: }
3635:
3636: sub EXT_cache_status {
3637: my ($target_domain,$target_user) = @_;
1.383 albertel 3638: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
1.389 www 3639: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
1.379 matthew 3640: # We know already the user has no data
3641: return 1;
3642: } else {
3643: return 0;
3644: }
3645: }
3646:
3647: sub EXT_cache_set {
3648: my ($target_domain,$target_user) = @_;
1.383 albertel 3649: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
1.379 matthew 3650: &appenv($cachename => time);
3651: }
3652:
1.28 www 3653: # --------------------------------------------------------- Value of a Variable
1.58 www 3654: sub EXT {
1.395 albertel 3655: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
1.218 albertel 3656:
1.68 www 3657: unless ($varname) { return ''; }
1.218 albertel 3658: #get real user name/domain, courseid and symb
3659: my $courseid;
1.359 albertel 3660: my $publicuser;
1.427 www 3661: if ($symbparm) {
3662: $symbparm=&get_symb_from_alias($symbparm);
3663: }
1.218 albertel 3664: if (!($uname && $udom)) {
1.360 albertel 3665: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
1.378 matthew 3666: &Apache::lonxml::whichuser($symbparm);
1.218 albertel 3667: if (!$symbparm) { $symbparm=$cursymb; }
3668: } else {
3669: $courseid=$ENV{'request.course.id'};
3670: }
1.48 www 3671: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
3672: my $rest;
1.320 albertel 3673: if (defined($therest[0])) {
1.48 www 3674: $rest=join('.',@therest);
3675: } else {
3676: $rest='';
3677: }
1.320 albertel 3678:
1.57 www 3679: my $qualifierrest=$qualifier;
3680: if ($rest) { $qualifierrest.='.'.$rest; }
3681: my $spacequalifierrest=$space;
3682: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1.28 www 3683: if ($realm eq 'user') {
1.48 www 3684: # --------------------------------------------------------------- user.resource
3685: if ($space eq 'resource') {
1.335 albertel 3686: if (defined($Apache::lonhomework::parsing_a_problem)) {
3687: return $Apache::lonhomework::history{$qualifierrest};
3688: } else {
1.359 albertel 3689: my %restored;
3690: if ($publicuser || $ENV{'request.state'} eq 'construct') {
3691: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
3692: } else {
3693: %restored=&restore($symbparm,$courseid,$udom,$uname);
3694: }
1.335 albertel 3695: return $restored{$qualifierrest};
3696: }
1.48 www 3697: # ----------------------------------------------------------------- user.access
3698: } elsif ($space eq 'access') {
1.218 albertel 3699: # FIXME - not supporting calls for a specific user
1.48 www 3700: return &allowed($qualifier,$rest);
3701: # ------------------------------------------ user.preferences, user.environment
3702: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1.218 albertel 3703: if (($uname eq $ENV{'user.name'}) &&
3704: ($udom eq $ENV{'user.domain'})) {
3705: return $ENV{join('.',('environment',$qualifierrest))};
3706: } else {
1.359 albertel 3707: my %returnhash;
3708: if (!$publicuser) {
3709: %returnhash=&userenvironment($udom,$uname,
3710: $qualifierrest);
3711: }
1.218 albertel 3712: return $returnhash{$qualifierrest};
3713: }
1.48 www 3714: # ----------------------------------------------------------------- user.course
3715: } elsif ($space eq 'course') {
1.218 albertel 3716: # FIXME - not supporting calls for a specific user
1.48 www 3717: return $ENV{join('.',('request.course',$qualifier))};
3718: # ------------------------------------------------------------------- user.role
3719: } elsif ($space eq 'role') {
1.218 albertel 3720: # FIXME - not supporting calls for a specific user
1.48 www 3721: my ($role,$where)=split(/\./,$ENV{'request.role'});
3722: if ($qualifier eq 'value') {
3723: return $role;
3724: } elsif ($qualifier eq 'extent') {
3725: return $where;
3726: }
3727: # ----------------------------------------------------------------- user.domain
3728: } elsif ($space eq 'domain') {
1.218 albertel 3729: return $udom;
1.48 www 3730: # ------------------------------------------------------------------- user.name
3731: } elsif ($space eq 'name') {
1.218 albertel 3732: return $uname;
1.48 www 3733: # ---------------------------------------------------- Any other user namespace
1.29 www 3734: } else {
1.359 albertel 3735: my %reply;
3736: if (!$publicuser) {
3737: %reply=&get($space,[$qualifierrest],$udom,$uname);
3738: }
3739: return $reply{$qualifierrest};
1.48 www 3740: }
1.236 www 3741: } elsif ($realm eq 'query') {
3742: # ---------------------------------------------- pull stuff out of query string
1.384 albertel 3743: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
3744: [$spacequalifierrest]);
1.376 albertel 3745: return $ENV{'form.'.$spacequalifierrest};
1.236 www 3746: } elsif ($realm eq 'request') {
1.48 www 3747: # ------------------------------------------------------------- request.browser
3748: if ($space eq 'browser') {
1.430 www 3749: if ($qualifier eq 'textremote') {
3750: if (&mt('textual_remote_display') eq 'on') {
3751: return 1;
3752: } else {
3753: return 0;
3754: }
3755: } else {
3756: return $ENV{'browser.'.$qualifier};
3757: }
1.57 www 3758: # ------------------------------------------------------------ request.filename
3759: } else {
3760: return $ENV{'request.'.$spacequalifierrest};
1.29 www 3761: }
1.28 www 3762: } elsif ($realm eq 'course') {
1.48 www 3763: # ---------------------------------------------------------- course.description
1.218 albertel 3764: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
1.57 www 3765: } elsif ($realm eq 'resource') {
1.165 www 3766:
1.395 albertel 3767: my $section;
1.359 albertel 3768: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
1.165 www 3769:
1.218 albertel 3770: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
1.165 www 3771:
1.60 www 3772: # ----------------------------------------------------- Cascading lookup scheme
1.218 albertel 3773: if (!$symbparm) { $symbparm=&symbread(); }
3774: my $symbp=$symbparm;
1.409 www 3775: my $mapp=(&decode_symb($symbp))[0];
1.218 albertel 3776:
3777: my $symbparm=$symbp.'.'.$spacequalifierrest;
3778: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3779:
3780: if (($ENV{'user.name'} eq $uname) &&
3781: ($ENV{'user.domain'} eq $udom)) {
1.255 albertel 3782: $section=$ENV{'request.course.sec'};
1.218 albertel 3783: } else {
1.377 matthew 3784: if (! defined($usection)) {
3785: $section=&usection($udom,$uname,$courseid);
3786: } else {
3787: $section = $usection;
3788: }
1.218 albertel 3789: }
3790:
3791: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3792: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3793: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3794:
3795: my $courselevel=$courseid.'.'.$spacequalifierrest;
3796: my $courselevelr=$courseid.'.'.$symbparm;
3797: my $courselevelm=$courseid.'.'.$mapparm;
1.69 www 3798:
1.60 www 3799: # ----------------------------------------------------------- first, check user
1.379 matthew 3800: #most student don\'t have any data set, check if there is some data
3801: if (! &EXT_cache_status($udom,$uname)) {
1.420 albertel 3802: my $hashid="$udom:$uname";
1.425 albertel 3803: my ($result,$cached)=&is_cached(\%userresdatacache,$hashid,
3804: 'userres');
1.454 albertel 3805: if (!defined($cached)) {
3806: my %resourcedata=&dump('resourcedata',$udom,$uname);
1.420 albertel 3807: $result=\%resourcedata;
1.425 albertel 3808: &do_cache(\%userresdatacache,$hashid,$result,'userres');
1.420 albertel 3809: }
3810: my ($tmp)=keys(%$result);
1.308 albertel 3811: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
1.420 albertel 3812: if ($$result{$courselevelr}) {
3813: return $$result{$courselevelr}; }
3814: if ($$result{$courselevelm}) {
3815: return $$result{$courselevelm}; }
3816: if ($$result{$courselevel}) {
3817: return $$result{$courselevel}; }
1.308 albertel 3818: } else {
1.459 albertel 3819: #error 2 occurs when the .db doesn't exist
3820: if ($tmp!~/error: 2 /) {
1.308 albertel 3821: &logthis("<font color=blue>WARNING:".
3822: " Trying to get resource data for ".
3823: $uname." at ".$udom.": ".
3824: $tmp."</font>");
1.459 albertel 3825: } elsif ($tmp=~/error: 2 /) {
1.379 matthew 3826: &EXT_cache_set($udom,$uname);
1.308 albertel 3827: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3828: return $tmp;
3829: }
1.218 albertel 3830: }
3831: }
1.95 www 3832:
1.60 www 3833: # -------------------------------------------------------- second, check course
1.96 www 3834:
1.218 albertel 3835: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3836: $ENV{'course.'.$courseid.'.domain'},
3837: ($seclevelr,$seclevelm,$seclevel,
3838: $courselevelr,$courselevelm,
3839: $courselevel));
1.287 albertel 3840: if (defined($coursereply)) { return $coursereply; }
1.200 www 3841:
1.60 www 3842: # ------------------------------------------------------ third, check map parms
1.218 albertel 3843: my %parmhash=();
3844: my $thisparm='';
3845: if (tie(%parmhash,'GDBM_File',
3846: $ENV{'request.course.fn'}.'_parms.db',
1.256 albertel 3847: &GDBM_READER(),0640)) {
1.218 albertel 3848: $thisparm=$parmhash{$symbparm};
3849: untie(%parmhash);
3850: }
3851: if ($thisparm) { return $thisparm; }
3852: }
1.60 www 3853: # --------------------------------------------- last, look in resource metadata
1.71 www 3854:
1.218 albertel 3855: $spacequalifierrest=~s/\./\_/;
1.282 albertel 3856: my $filename;
3857: if (!$symbparm) { $symbparm=&symbread(); }
3858: if ($symbparm) {
1.409 www 3859: $filename=(&decode_symb($symbparm))[2];
1.282 albertel 3860: } else {
3861: $filename=$ENV{'request.filename'};
3862: }
3863: my $metadata=&metadata($filename,$spacequalifierrest);
1.288 albertel 3864: if (defined($metadata)) { return $metadata; }
1.282 albertel 3865: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
1.288 albertel 3866: if (defined($metadata)) { return $metadata; }
1.142 www 3867:
1.145 www 3868: # ------------------------------------------------------------------ Cascade up
1.218 albertel 3869: unless ($space eq '0') {
1.336 albertel 3870: my @parts=split(/_/,$space);
3871: my $id=pop(@parts);
3872: my $part=join('_',@parts);
3873: if ($part eq '') { $part='0'; }
3874: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
1.395 albertel 3875: $symbparm,$udom,$uname,$section,1);
1.337 albertel 3876: if (defined($partgeneral)) { return $partgeneral; }
1.218 albertel 3877: }
1.395 albertel 3878: if ($recurse) { return undef; }
3879: my $pack_def=&packages_tab_default($filename,$varname);
3880: if (defined($pack_def)) { return $pack_def; }
1.71 www 3881:
1.48 www 3882: # ---------------------------------------------------- Any other user namespace
3883: } elsif ($realm eq 'environment') {
3884: # ----------------------------------------------------------------- environment
1.219 albertel 3885: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3886: return $ENV{'environment.'.$spacequalifierrest};
3887: } else {
3888: my %returnhash=&userenvironment($udom,$uname,
3889: $spacequalifierrest);
3890: return $returnhash{$spacequalifierrest};
3891: }
1.28 www 3892: } elsif ($realm eq 'system') {
1.48 www 3893: # ----------------------------------------------------------------- system.time
3894: if ($space eq 'time') {
3895: return time;
3896: }
1.28 www 3897: }
1.48 www 3898: return '';
1.61 www 3899: }
3900:
1.395 albertel 3901: sub packages_tab_default {
3902: my ($uri,$varname)=@_;
3903: my (undef,$part,$name)=split(/\./,$varname);
3904: my $packages=&metadata($uri,'packages');
3905: foreach my $package (split(/,/,$packages)) {
3906: my ($pack_type,$pack_part)=split(/_/,$package,2);
1.468 albertel 3907: if (defined($packagetab{"$pack_type&$name&default"})) {
3908: return $packagetab{"$pack_type&$name&default"};
3909: }
3910: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
3911: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
1.395 albertel 3912: }
3913: }
3914: return undef;
3915: }
3916:
1.334 albertel 3917: sub add_prefix_and_part {
3918: my ($prefix,$part)=@_;
3919: my $keyroot;
3920: if (defined($prefix) && $prefix !~ /^__/) {
3921: # prefix that has a part already
3922: $keyroot=$prefix;
3923: } elsif (defined($prefix)) {
3924: # prefix that is missing a part
3925: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3926: } else {
3927: # no prefix at all
3928: if (defined($part)) { $keyroot='_'.$part; }
3929: }
3930: return $keyroot;
3931: }
3932:
1.71 www 3933: # ---------------------------------------------------------------- Get metadata
3934:
3935: sub metadata {
1.176 www 3936: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
1.71 www 3937: $uri=&declutter($uri);
1.288 albertel 3938: # if it is a non metadata possible uri return quickly
1.293 matthew 3939: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
1.423 albertel 3940: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
1.472 albertel 3941: ($uri =~ m|home/[^/]+/public_html/|) || ($uri =~ m|^uploaded/|)) {
1.468 albertel 3942: return undef;
1.288 albertel 3943: }
1.73 www 3944: my $filename=$uri;
3945: $uri=~s/\.meta$//;
1.172 www 3946: #
3947: # Is the metadata already cached?
1.177 www 3948: # Look at timestamp of caching
1.172 www 3949: # Everything is cached by the main uri, libraries are never directly cached
3950: #
1.428 albertel 3951: if (!defined($liburi)) {
3952: my ($result,$cached)=&is_cached(\%metacache,$uri,'meta');
3953: if (defined($cached)) { return $result->{':'.$what}; }
3954: }
3955: {
1.172 www 3956: #
3957: # Is this a recursive call for a library?
3958: #
1.453 albertel 3959: if (! exists($metacache{$uri})) {
3960: $metacache{$uri}={};
3961: }
1.171 www 3962: if ($liburi) {
3963: $liburi=&declutter($liburi);
3964: $filename=$liburi;
1.401 bowersj2 3965: } else {
1.428 albertel 3966: &devalidate_cache(\%metacache,$uri,'meta');
1.401 bowersj2 3967: }
1.140 www 3968: my %metathesekeys=();
1.73 www 3969: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
1.335 albertel 3970: my $metastring=&getfile(&filelocation('',&clutter($filename)));
1.208 albertel 3971: my $parser=HTML::LCParser->new(\$metastring);
1.71 www 3972: my $token;
1.140 www 3973: undef %metathesekeys;
1.71 www 3974: while ($token=$parser->get_token) {
1.339 albertel 3975: if ($token->[0] eq 'S') {
3976: if (defined($token->[2]->{'package'})) {
1.172 www 3977: #
3978: # This is a package - get package info
3979: #
1.339 albertel 3980: my $package=$token->[2]->{'package'};
3981: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3982: if (defined($token->[2]->{'id'})) {
3983: $keyroot.='_'.$token->[2]->{'id'};
3984: }
1.453 albertel 3985: if ($metacache{$uri}->{':packages'}) {
3986: $metacache{$uri}->{':packages'}.=','.$package.$keyroot;
1.339 albertel 3987: } else {
1.453 albertel 3988: $metacache{$uri}->{':packages'}=$package.$keyroot;
1.339 albertel 3989: }
3990: foreach (keys %packagetab) {
1.432 albertel 3991: my $part=$keyroot;
3992: $part=~s/^\_//;
3993: if ($_=~/^\Q$package\E\&/ ||
3994: $_=~/^\Q$package\E_0\&/) {
1.339 albertel 3995: my ($pack,$name,$subp)=split(/\&/,$_);
1.395 albertel 3996: # ignore package.tab specified default values
3997: # here &package_tab_default() will fetch those
3998: if ($subp eq 'default') { next; }
1.339 albertel 3999: my $value=$packagetab{$_};
1.432 albertel 4000: my $unikey;
4001: if ($pack =~ /_0$/) {
4002: $unikey='parameter_0_'.$name;
4003: $part=0;
4004: } else {
4005: $unikey='parameter'.$keyroot.'_'.$name;
4006: }
1.339 albertel 4007: if ($subp eq 'display') {
4008: $value.=' [Part: '.$part.']';
4009: }
1.453 albertel 4010: $metacache{$uri}->{':'.$unikey.'.part'}=$part;
1.395 albertel 4011: $metathesekeys{$unikey}=1;
1.453 albertel 4012: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4013: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
1.339 albertel 4014: }
1.453 albertel 4015: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4016: $metacache{$uri}->{':'.$unikey}=
4017: $metacache{$uri}->{':'.$unikey.'.default'};
1.356 albertel 4018: }
1.339 albertel 4019: }
4020: }
4021: } else {
1.172 www 4022: #
4023: # This is not a package - some other kind of start tag
1.339 albertel 4024: #
4025: my $entry=$token->[1];
4026: my $unikey;
4027: if ($entry eq 'import') {
4028: $unikey='';
4029: } else {
4030: $unikey=$entry;
4031: }
4032: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4033:
4034: if (defined($token->[2]->{'id'})) {
4035: $unikey.='_'.$token->[2]->{'id'};
4036: }
1.175 www 4037:
1.339 albertel 4038: if ($entry eq 'import') {
1.175 www 4039: #
4040: # Importing a library here
1.339 albertel 4041: #
4042: if ($depthcount<20) {
4043: my $location=$parser->get_text('/import');
4044: my $dir=$filename;
4045: $dir=~s|[^/]*$||;
4046: $location=&filelocation($dir,$location);
4047: foreach (sort(split(/\,/,&metadata($uri,'keys',
4048: $location,$unikey,
4049: $depthcount+1)))) {
1.453 albertel 4050: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
1.339 albertel 4051: $metathesekeys{$_}=1;
4052: }
4053: }
4054: } else {
4055:
4056: if (defined($token->[2]->{'name'})) {
4057: $unikey.='_'.$token->[2]->{'name'};
4058: }
4059: $metathesekeys{$unikey}=1;
4060: foreach (@{$token->[3]}) {
1.453 albertel 4061: $metacache{$uri}->{':'.$unikey.'.'.$_}=$token->[2]->{$_};
1.339 albertel 4062: }
4063: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
1.453 albertel 4064: my $default=$metacache{$uri}->{':'.$unikey.'.default'};
1.339 albertel 4065: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
4066: # only ws inside the tag, and not in default, so use default
4067: # as value
1.453 albertel 4068: $metacache{$uri}->{':'.$unikey}=$default;
1.339 albertel 4069: } else {
1.321 albertel 4070: # either something interesting inside the tag or default
4071: # uninteresting
1.453 albertel 4072: $metacache{$uri}->{':'.$unikey}=$internaltext;
1.339 albertel 4073: }
1.172 www 4074: # end of not-a-package not-a-library import
1.339 albertel 4075: }
1.172 www 4076: # end of not-a-package start tag
1.339 albertel 4077: }
1.172 www 4078: # the next is the end of "start tag"
1.339 albertel 4079: }
4080: }
1.483 albertel 4081: my ($extension) = ($uri =~ /\.(\w+)$/);
4082: foreach my $key (sort(keys(%packagetab))) {
4083: #&logthis("extsion1 $extension $key !!");
4084: #no specific packages #how's our extension
4085: if ($key!~/^extension_\Q$extension\E&/) { next; }
4086: &metadata_create_pacakge_def($uri,$key,'extension_'.$extension,
4087: \%metathesekeys);
4088: }
4089: if (!exists($metacache{$uri}->{':packages'})) {
4090: foreach my $key (sort(keys(%packagetab))) {
4091: #no specific packages well let's get default then
4092: if ($key!~/^default&/) { next; }
4093: &metadata_create_pacakge_def($uri,$key,'default',
4094: \%metathesekeys);
4095: }
4096: }
1.338 www 4097: # are there custom rights to evaluate
1.453 albertel 4098: if ($metacache{$uri}->{':copyright'} eq 'custom') {
1.339 albertel 4099:
1.338 www 4100: #
4101: # Importing a rights file here
1.339 albertel 4102: #
4103: unless ($depthcount) {
1.453 albertel 4104: my $location=$metacache{$uri}->{':customdistributionfile'};
1.339 albertel 4105: my $dir=$filename;
4106: $dir=~s|[^/]*$||;
4107: $location=&filelocation($dir,$location);
4108: foreach (sort(split(/\,/,&metadata($uri,'keys',
4109: $location,'_rights',
4110: $depthcount+1)))) {
1.453 albertel 4111: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
1.339 albertel 4112: $metathesekeys{$_}=1;
4113: }
4114: }
4115: }
1.453 albertel 4116: $metacache{$uri}->{':keys'}=join(',',keys %metathesekeys);
4117: &metadata_generate_part0(\%metathesekeys,$metacache{$uri},$uri);
4118: $metacache{$uri}->{':allpossiblekeys'}=join(',',keys %metathesekeys);
4119: &do_cache(\%metacache,$uri,$metacache{$uri},'meta');
1.177 www 4120: # this is the end of "was not already recently cached
1.71 www 4121: }
1.428 albertel 4122: return $metacache{$uri}->{':'.$what};
1.261 albertel 4123: }
4124:
1.483 albertel 4125: sub metadata_create_pacakge_def {
4126: my ($uri,$key,$package,$metathesekeys)=@_;
4127: my ($pack,$name,$subp)=split(/\&/,$key);
4128: if ($subp eq 'default') { next; }
4129:
4130: if (defined($metacache{$uri}->{':packages'})) {
4131: $metacache{$uri}->{':packages'}.=','.$package;
4132: } else {
4133: $metacache{$uri}->{':packages'}=$package;
4134: }
4135: my $value=$packagetab{$key};
4136: my $unikey;
4137: $unikey='parameter_0_'.$name;
4138: $metacache{$uri}->{':'.$unikey.'.part'}=0;
4139: $$metathesekeys{$unikey}=1;
4140: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4141: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
4142: }
4143: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4144: $metacache{$uri}->{':'.$unikey}=
4145: $metacache{$uri}->{':'.$unikey.'.default'};
4146: }
4147: }
4148:
1.261 albertel 4149: sub metadata_generate_part0 {
4150: my ($metadata,$metacache,$uri) = @_;
4151: my %allnames;
4152: foreach my $metakey (sort keys %$metadata) {
4153: if ($metakey=~/^parameter\_(.*)/) {
1.428 albertel 4154: my $part=$$metacache{':'.$metakey.'.part'};
4155: my $name=$$metacache{':'.$metakey.'.name'};
1.356 albertel 4156: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
1.261 albertel 4157: $allnames{$name}=$part;
4158: }
4159: }
4160: }
4161: foreach my $name (keys(%allnames)) {
4162: $$metadata{"parameter_0_$name"}=1;
1.428 albertel 4163: my $key=":parameter_0_$name";
1.261 albertel 4164: $$metacache{"$key.part"}='0';
4165: $$metacache{"$key.name"}=$name;
1.428 albertel 4166: $$metacache{"$key.type"}=$$metacache{':parameter_'.
1.261 albertel 4167: $allnames{$name}.'_'.$name.
4168: '.type'};
1.428 albertel 4169: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
1.261 albertel 4170: '.display'};
4171: my $expr='\\[Part: '.$allnames{$name}.'\\]';
1.479 albertel 4172: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
1.261 albertel 4173: $$metacache{"$key.display"}=$olddis;
4174: }
1.71 www 4175: }
4176:
1.301 www 4177: # ------------------------------------------------- Get the title of a resource
4178:
4179: sub gettitle {
4180: my $urlsymb=shift;
4181: my $symb=&symbread($urlsymb);
4182: unless ($symb) {
4183: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
4184: return &metadata($urlsymb,'title');
4185: }
1.425 albertel 4186: my ($result,$cached)=&is_cached(\%titlecache,$symb,'title',600);
1.419 albertel 4187: if (defined($cached)) { return $result; }
1.409 www 4188: my ($map,$resid,$url)=&decode_symb($symb);
1.301 www 4189: my $title='';
4190: my %bighash;
4191: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4192: &GDBM_READER(),0640)) {
4193: my $mapid=$bighash{'map_pc_'.&clutter($map)};
4194: $title=$bighash{'title_'.$mapid.'.'.$resid};
4195: untie %bighash;
4196: }
1.363 www 4197: $title=~s/\&colon\;/\:/gs;
1.301 www 4198: if ($title) {
1.425 albertel 4199: return &do_cache(\%titlecache,$symb,$title,'title');
1.301 www 4200: } else {
4201: return &metadata($urlsymb,'title');
4202: }
4203: }
4204:
1.31 www 4205: # ------------------------------------------------- Update symbolic store links
4206:
4207: sub symblist {
4208: my ($mapname,%newhash)=@_;
1.438 www 4209: $mapname=&deversion(&declutter($mapname));
1.31 www 4210: my %hash;
4211: if (($ENV{'request.course.fn'}) && (%newhash)) {
4212: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1.256 albertel 4213: &GDBM_WRCREAT(),0640)) {
1.191 harris41 4214: foreach (keys %newhash) {
1.438 www 4215: $hash{declutter($_)}=$mapname.'___'.&deversion($newhash{$_});
1.191 harris41 4216: }
1.31 www 4217: if (untie(%hash)) {
4218: return 'ok';
4219: }
4220: }
4221: }
4222: return 'error';
1.212 www 4223: }
4224:
4225: # --------------------------------------------------------------- Verify a symb
4226:
4227: sub symbverify {
4228: my ($symb,$thisfn)=@_;
1.439 www 4229: $thisfn=&declutter($thisfn);
1.215 www 4230: # direct jump to resource in page or to a sequence - will construct own symbs
4231: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
4232: # check URL part
1.409 www 4233: my ($map,$resid,$url)=&decode_symb($symb);
1.439 www 4234:
1.431 www 4235: unless ($url eq $thisfn) { return 0; }
1.213 www 4236:
1.216 www 4237: $symb=&symbclean($symb);
1.439 www 4238: $thisfn=&deversion($thisfn);
1.213 www 4239:
4240: my %bighash;
4241: my $okay=0;
1.431 www 4242:
1.213 www 4243: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1.256 albertel 4244: &GDBM_READER(),0640)) {
1.280 www 4245: my $ids=$bighash{'ids_'.&clutter($thisfn)};
1.216 www 4246: unless ($ids) {
4247: $ids=$bighash{'ids_/'.$thisfn};
4248: }
4249: if ($ids) {
4250: # ------------------------------------------------------------------- Has ID(s)
4251: foreach (split(/\,/,$ids)) {
4252: my ($mapid,$resid)=split(/\./,$_);
4253: if (
4254: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
4255: eq $symb) {
4256: $okay=1;
4257: }
4258: }
4259: }
1.213 www 4260: untie(%bighash);
4261: }
4262: return $okay;
1.31 www 4263: }
4264:
1.210 www 4265: # --------------------------------------------------------------- Clean-up symb
4266:
4267: sub symbclean {
4268: my $symb=shift;
1.213 www 4269:
1.210 www 4270: # remove version from map
4271: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
1.215 www 4272:
1.210 www 4273: # remove version from URL
4274: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
1.213 www 4275:
1.210 www 4276: return $symb;
1.409 www 4277: }
4278:
4279: # ---------------------------------------------- Split symb to find map and url
1.429 albertel 4280:
4281: sub encode_symb {
4282: my ($map,$resid,$url)=@_;
4283: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
4284: }
1.409 www 4285:
4286: sub decode_symb {
1.413 www 4287: my ($map,$resid,$url)=split(/\_\_\_/,shift);
4288: return (&fixversion($map),$resid,&fixversion($url));
4289: }
4290:
4291: sub fixversion {
4292: my $fn=shift;
4293: if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
1.435 www 4294: my %bighash;
4295: my $uri=&clutter($fn);
1.440 www 4296: my $key=$ENV{'request.course.id'}.'_'.$uri;
4297: # is this cached?
4298: my ($result,$cached)=&is_cached(\%courseresversioncache,$key,
4299: 'courseresversion',600);
4300: if (defined($cached)) { return $result; }
4301: # unfortunately not cached, or expired
1.435 www 4302: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1.440 www 4303: &GDBM_READER(),0640)) {
4304: if ($bighash{'version_'.$uri}) {
4305: my $version=$bighash{'version_'.$uri};
1.444 www 4306: unless (($version eq 'mostrecent') ||
4307: ($version==&getversion($uri))) {
1.440 www 4308: $uri=~s/\.(\w+)$/\.$version\.$1/;
4309: }
4310: }
4311: untie %bighash;
1.413 www 4312: }
1.440 www 4313: return &do_cache
4314: (\%courseresversioncache,$key,&declutter($uri),'courseresversion');
1.438 www 4315: }
4316:
4317: sub deversion {
4318: my $url=shift;
4319: $url=~s/\.\d+\.(\w+)$/\.$1/;
4320: return $url;
1.210 www 4321: }
4322:
1.31 www 4323: # ------------------------------------------------------ Return symb list entry
4324:
4325: sub symbread {
1.249 www 4326: my ($thisfn,$donotrecurse)=@_;
1.242 www 4327: # no filename provided? try from environment
1.44 www 4328: unless ($thisfn) {
1.210 www 4329: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
1.44 www 4330: $thisfn=$ENV{'request.filename'};
4331: }
1.242 www 4332: # is that filename actually a symb? Verify, clean, and return
4333: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
4334: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
4335: }
1.44 www 4336: $thisfn=declutter($thisfn);
1.31 www 4337: my %hash;
1.37 www 4338: my %bighash;
4339: my $syval='';
1.45 www 4340: if (($ENV{'request.course.fn'}) && ($thisfn)) {
1.481 raeburn 4341: my $targetfn = $thisfn;
4342: if ( ($thisfn =~ m/^uploaded\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
4343: $targetfn = 'adm/wrapper/'.$thisfn;
4344: }
1.31 www 4345: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1.256 albertel 4346: &GDBM_READER(),0640)) {
1.481 raeburn 4347: $syval=$hash{$targetfn};
1.37 www 4348: untie(%hash);
4349: }
4350: # ---------------------------------------------------------- There was an entry
4351: if ($syval) {
4352: unless ($syval=~/\_\d+$/) {
4353: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
1.44 www 4354: &appenv('request.ambiguous' => $thisfn);
1.37 www 4355: return '';
4356: }
4357: $syval.=$1;
4358: }
4359: } else {
4360: # ------------------------------------------------------- Was not in symb table
4361: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1.256 albertel 4362: &GDBM_READER(),0640)) {
1.37 www 4363: # ---------------------------------------------- Get ID(s) for current resource
1.280 www 4364: my $ids=$bighash{'ids_'.&clutter($thisfn)};
1.65 www 4365: unless ($ids) {
4366: $ids=$bighash{'ids_/'.$thisfn};
1.242 www 4367: }
4368: unless ($ids) {
4369: # alias?
4370: $ids=$bighash{'mapalias_'.$thisfn};
1.65 www 4371: }
1.37 www 4372: if ($ids) {
4373: # ------------------------------------------------------------------- Has ID(s)
4374: my @possibilities=split(/\,/,$ids);
1.39 www 4375: if ($#possibilities==0) {
4376: # ----------------------------------------------- There is only one possibility
1.37 www 4377: my ($mapid,$resid)=split(/\./,$ids);
4378: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
1.249 www 4379: } elsif (!$donotrecurse) {
1.39 www 4380: # ------------------------------------------ There is more than one possibility
4381: my $realpossible=0;
1.191 harris41 4382: foreach (@possibilities) {
1.39 www 4383: my $file=$bighash{'src_'.$_};
4384: if (&allowed('bre',$file)) {
4385: my ($mapid,$resid)=split(/\./,$_);
4386: if ($bighash{'map_type_'.$mapid} ne 'page') {
4387: $realpossible++;
4388: $syval=declutter($bighash{'map_id_'.$mapid}).
4389: '___'.$resid;
4390: }
4391: }
1.191 harris41 4392: }
1.39 www 4393: if ($realpossible!=1) { $syval=''; }
1.249 www 4394: } else {
4395: $syval='';
1.37 www 4396: }
4397: }
4398: untie(%bighash)
1.481 raeburn 4399: }
1.31 www 4400: }
1.62 www 4401: if ($syval) {
1.210 www 4402: return &symbclean($syval.'___'.$thisfn);
1.62 www 4403: }
1.31 www 4404: }
1.44 www 4405: &appenv('request.ambiguous' => $thisfn);
1.31 www 4406: return '';
4407: }
4408:
4409: # ---------------------------------------------------------- Return random seed
4410:
1.32 www 4411: sub numval {
4412: my $txt=shift;
4413: $txt=~tr/A-J/0-9/;
4414: $txt=~tr/a-j/0-9/;
4415: $txt=~tr/K-T/0-9/;
4416: $txt=~tr/k-t/0-9/;
4417: $txt=~tr/U-Z/0-5/;
4418: $txt=~tr/u-z/0-5/;
4419: $txt=~s/\D//g;
4420: return int($txt);
1.368 albertel 4421: }
4422:
1.484 albertel 4423: sub numval2 {
4424: my $txt=shift;
4425: $txt=~tr/A-J/0-9/;
4426: $txt=~tr/a-j/0-9/;
4427: $txt=~tr/K-T/0-9/;
4428: $txt=~tr/k-t/0-9/;
4429: $txt=~tr/U-Z/0-5/;
4430: $txt=~tr/u-z/0-5/;
4431: $txt=~s/\D//g;
4432: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
4433: my $total;
4434: foreach my $val (@txts) { $total+=$val; }
4435: return int($total);
4436: }
4437:
1.368 albertel 4438: sub latest_rnd_algorithm_id {
1.443 albertel 4439: return '64bit2';
1.366 albertel 4440: }
1.32 www 4441:
1.31 www 4442: sub rndseed {
1.155 albertel 4443: my ($symb,$courseid,$domain,$username)=@_;
1.366 albertel 4444:
4445: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
1.155 albertel 4446: if (!$symb) {
1.366 albertel 4447: unless ($symb=$wsymb) { return time; }
4448: }
4449: if (!$courseid) { $courseid=$wcourseid; }
4450: if (!$domain) { $domain=$wdomain; }
4451: if (!$username) { $username=$wusername }
4452: my $which=$ENV{"course.$courseid.rndseed"};
1.484 albertel 4453: my $CODE=$ENV{'form.CODE'};
1.366 albertel 4454: if (defined($CODE)) {
1.484 albertel 4455: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
1.443 albertel 4456: } elsif ($which eq '64bit2') {
4457: return &rndseed_64bit2($symb,$courseid,$domain,$username);
1.366 albertel 4458: } elsif ($which eq '64bit') {
4459: return &rndseed_64bit($symb,$courseid,$domain,$username);
4460: }
4461: return &rndseed_32bit($symb,$courseid,$domain,$username);
4462: }
4463:
4464: sub rndseed_32bit {
4465: my ($symb,$courseid,$domain,$username)=@_;
4466: {
4467: use integer;
4468: my $symbchck=unpack("%32C*",$symb) << 27;
4469: my $symbseed=numval($symb) << 22;
4470: my $namechck=unpack("%32C*",$username) << 17;
4471: my $nameseed=numval($username) << 12;
4472: my $domainseed=unpack("%32C*",$domain) << 7;
4473: my $courseseed=unpack("%32C*",$courseid);
4474: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
4475: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4476: #&Apache::lonxml::debug("rndseed :$num:$symb");
4477: return $num;
4478: }
4479: }
4480:
4481: sub rndseed_64bit {
4482: my ($symb,$courseid,$domain,$username)=@_;
4483: {
4484: use integer;
4485: my $symbchck=unpack("%32S*",$symb) << 21;
4486: my $symbseed=numval($symb) << 10;
4487: my $namechck=unpack("%32S*",$username);
4488:
4489: my $nameseed=numval($username) << 21;
4490: my $domainseed=unpack("%32S*",$domain) << 10;
4491: my $courseseed=unpack("%32S*",$courseid);
4492:
4493: my $num1=$symbchck+$symbseed+$namechck;
4494: my $num2=$nameseed+$domainseed+$courseseed;
4495: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4496: #&Apache::lonxml::debug("rndseed :$num:$symb");
4497: return "$num1,$num2";
1.155 albertel 4498: }
1.366 albertel 4499: }
4500:
1.443 albertel 4501: sub rndseed_64bit2 {
4502: my ($symb,$courseid,$domain,$username)=@_;
4503: {
4504: use integer;
4505: # strings need to be an even # of cahracters long, it it is odd the
4506: # last characters gets thrown away
4507: my $symbchck=unpack("%32S*",$symb.' ') << 21;
4508: my $symbseed=numval($symb) << 10;
4509: my $namechck=unpack("%32S*",$username.' ');
4510:
4511: my $nameseed=numval($username) << 21;
4512: my $domainseed=unpack("%32S*",$domain.' ') << 10;
4513: my $courseseed=unpack("%32S*",$courseid.' ');
4514:
4515: my $num1=$symbchck+$symbseed+$namechck;
4516: my $num2=$nameseed+$domainseed+$courseseed;
4517: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4518: #&Apache::lonxml::debug("rndseed :$num:$symb");
4519: return "$num1,$num2";
4520: }
4521: }
4522:
1.366 albertel 4523: sub rndseed_CODE_64bit {
4524: my ($symb,$courseid,$domain,$username)=@_;
1.155 albertel 4525: {
1.366 albertel 4526: use integer;
1.443 albertel 4527: my $symbchck=unpack("%32S*",$symb.' ') << 16;
1.484 albertel 4528: my $symbseed=numval2($symb);
4529: my $CODEchck=unpack("%32S*",$ENV{'form.CODE'}.' ') << 16;
4530: my $CODEseed=numval($ENV{'form.CODE'});
1.443 albertel 4531: my $courseseed=unpack("%32S*",$courseid.' ');
1.484 albertel 4532: my $num1=$symbseed+$CODEchck;
4533: my $num2=$CODEseed+$courseseed+$symbchck;
4534: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
1.366 albertel 4535: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
4536: return "$num1,$num2";
4537: }
4538: }
4539:
4540: sub setup_random_from_rndseed {
4541: my ($rndseed)=@_;
4542: if ($rndseed =~/,/) {
4543: my ($num1,$num2)=split(/,/,$rndseed);
4544: &Math::Random::random_set_seed(abs($num1),abs($num2));
4545: } else {
4546: &Math::Random::random_set_seed_from_phrase($rndseed);
1.98 albertel 4547: }
1.36 albertel 4548: }
4549:
1.474 albertel 4550: sub latest_receipt_algorithm_id {
4551: return 'receipt2';
4552: }
4553:
1.480 www 4554: sub recunique {
4555: my $fucourseid=shift;
4556: my $unique;
4557: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
4558: $unique=$ENV{"course.$fucourseid.internal.encseed"};
4559: } else {
4560: $unique=$perlvar{'lonReceipt'};
4561: }
4562: return unpack("%32C*",$unique);
4563: }
4564:
4565: sub recprefix {
4566: my $fucourseid=shift;
4567: my $prefix;
4568: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
4569: $prefix=$ENV{"course.$fucourseid.internal.encpref"};
4570: } else {
4571: $prefix=$perlvar{'lonHostID'};
4572: }
4573: return unpack("%32C*",$prefix);
4574: }
4575:
1.76 www 4576: sub ireceipt {
1.474 albertel 4577: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
1.76 www 4578: my $cuname=unpack("%32C*",$funame);
4579: my $cudom=unpack("%32C*",$fudom);
4580: my $cucourseid=unpack("%32C*",$fucourseid);
4581: my $cusymb=unpack("%32C*",$fusymb);
1.480 www 4582: my $cunique=&recunique($fucourseid);
1.474 albertel 4583: my $cpart=unpack("%32S*",$part);
1.480 www 4584: my $return =&recprefix($fucourseid).'-';
1.474 albertel 4585: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
4586: $ENV{'request.state'} eq 'construct') {
4587: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
4588: " and ".($cpart%$cudom));
4589:
4590: $return.= ($cunique%$cuname+
4591: $cunique%$cudom+
4592: $cusymb%$cuname+
4593: $cusymb%$cudom+
4594: $cucourseid%$cuname+
4595: $cucourseid%$cudom+
4596: $cpart%$cuname+
4597: $cpart%$cudom);
4598: } else {
4599: $return.= ($cunique%$cuname+
4600: $cunique%$cudom+
4601: $cusymb%$cuname+
4602: $cusymb%$cudom+
4603: $cucourseid%$cuname+
4604: $cucourseid%$cudom);
4605: }
4606: return $return;
1.76 www 4607: }
4608:
4609: sub receipt {
1.474 albertel 4610: my ($part)=@_;
4611: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
4612: return &ireceipt($name,$domain,$courseid,$symb,$part);
1.76 www 4613: }
1.260 ng 4614:
1.36 albertel 4615: # ------------------------------------------------------------ Serves up a file
1.472 albertel 4616: # returns either the contents of the file or
4617: # -1 if the file doesn't exist
1.481 raeburn 4618: #
4619: # if the target is a file that was uploaded via DOCS,
4620: # a check will be made to see if a current copy exists on the local server,
4621: # if it does this will be served, otherwise a copy will be retrieved from
4622: # the home server for the course and stored in /home/httpd/html/userfiles on
4623: # the local server.
1.472 albertel 4624:
1.36 albertel 4625: sub getfile {
1.481 raeburn 4626: my ($file,$caller) = @_;
1.482 albertel 4627:
4628: if ($file !~ m|^/*uploaded/(\w+)/(\w+)/(.+)$|) {
4629: # normal file from res space
1.472 albertel 4630: &repcopy($file);
1.481 raeburn 4631: return &readfile($file);
4632: }
1.482 albertel 4633:
4634: my $info;
4635: my $cdom = $1;
4636: my $cnum = $2;
4637: my $filename = $3;
4638: my $path = $Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles';
4639: my ($lwpresp,$rtncode);
4640: my $localfile = $path.'/'.$cdom.'/'.$cnum.'/'.$filename;
4641: if (-e "$localfile") {
4642: my @fileinfo = stat($localfile);
4643: $lwpresp = &getuploaded('HEAD',$file,$cdom,$cnum,\$info,\$rtncode);
4644: if ($lwpresp ne 'ok') {
4645: if ($rtncode eq '404') {
4646: unlink($localfile);
4647: }
4648: return -1;
4649: }
4650: if ($info < $fileinfo[9]) {
4651: return &readfile($localfile);
4652: }
4653: $info = '';
4654: $lwpresp = &getuploaded('GET',$file,$cdom,$cnum,\$info,\$rtncode);
4655: if ($lwpresp ne 'ok') {
4656: return -1;
4657: }
4658: } else {
4659: $lwpresp = &getuploaded('GET',$file,$cdom,$cnum,\$info,\$rtncode);
4660: if ($lwpresp ne 'ok') {
4661: return -1;
4662: }
4663: my @parts = ($cdom,$cnum);
4664: if ($filename =~ m|^(.+)/[^/]+$|) {
4665: push @parts, split(/\//,$1);
4666: }
4667: foreach my $part (@parts) {
4668: $path .= '/'.$part;
4669: if (!-e $path) {
4670: mkdir($path,0770);
4671: }
4672: }
4673: }
4674: open (FILE,">$localfile");
4675: print FILE $info;
4676: close(FILE);
4677: if ($caller eq 'uploadrep') {
4678: return 'ok';
4679: }
4680: return $info;
1.481 raeburn 4681: }
4682:
4683: sub getuploaded {
4684: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
4685: $uri=~s/^\///;
4686: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
4687: my $ua=new LWP::UserAgent;
4688: my $request=new HTTP::Request($reqtype,$uri);
4689: my $response=$ua->request($request);
4690: $$rtncode = $response->code;
1.482 albertel 4691: if (! $response->is_success()) {
4692: return 'failed';
4693: }
4694: if ($reqtype eq 'HEAD') {
1.486 www 4695: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
1.482 albertel 4696: } elsif ($reqtype eq 'GET') {
4697: $$info = $response->content;
1.472 albertel 4698: }
1.482 albertel 4699: return 'ok';
1.36 albertel 4700: }
4701:
1.481 raeburn 4702: sub readfile {
4703: my $file = shift;
4704: if ( (! -e $file ) || ($file eq '') ) { return -1; };
4705: my $fh;
4706: open($fh,"<$file");
4707: my $a='';
4708: while (<$fh>) { $a .=$_; }
4709: return $a;
4710: }
4711:
1.36 albertel 4712: sub filelocation {
4713: my ($dir,$file) = @_;
4714: my $location;
4715: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
1.59 albertel 4716: if ($file=~m:^/~:) { # is a contruction space reference
4717: $location = $file;
4718: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
1.270 www 4719: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
4720: $location=$file;
1.36 albertel 4721: } else {
1.479 albertel 4722: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
1.464 albertel 4723: $file=~s:^/res/:/:;
1.59 albertel 4724: if ( !( $file =~ m:^/:) ) {
4725: $location = $dir. '/'.$file;
4726: } else {
4727: $location = '/home/httpd/html/res'.$file;
4728: }
1.36 albertel 4729: }
4730: $location=~s://+:/:g; # remove duplicate /
1.46 www 4731: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
1.475 albertel 4732: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
1.46 www 4733: return $location;
4734: }
1.36 albertel 4735:
1.46 www 4736: sub hreflocation {
4737: my ($dir,$file)=@_;
1.460 albertel 4738: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
4739: my $finalpath=filelocation($dir,$file);
4740: $finalpath=~s-^/home/httpd/html--;
1.462 albertel 4741: $finalpath=~s-^/home/(\w+)/public_html/-/~$1/-;
1.460 albertel 4742: return $finalpath;
4743: } elsif ($file=~m-^/home-) {
4744: $file=~s-^/home/httpd/html--;
1.462 albertel 4745: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
1.460 albertel 4746: return $file;
1.46 www 4747: }
1.462 albertel 4748: return $file;
1.465 albertel 4749: }
4750:
4751: sub current_machine_domains {
4752: my $hostname=$hostname{$perlvar{'lonHostID'}};
4753: my @domains;
4754: while( my($id, $name) = each(%hostname)) {
1.467 matthew 4755: # &logthis("-$id-$name-$hostname-");
1.465 albertel 4756: if ($hostname eq $name) {
4757: push(@domains,$hostdom{$id});
4758: }
4759: }
4760: return @domains;
4761: }
4762:
4763: sub current_machine_ids {
4764: my $hostname=$hostname{$perlvar{'lonHostID'}};
4765: my @ids;
4766: while( my($id, $name) = each(%hostname)) {
1.467 matthew 4767: # &logthis("-$id-$name-$hostname-");
1.465 albertel 4768: if ($hostname eq $name) {
4769: push(@ids,$id);
4770: }
4771: }
4772: return @ids;
1.31 www 4773: }
4774:
4775: # ------------------------------------------------------------- Declutters URLs
4776:
4777: sub declutter {
4778: my $thisfn=shift;
1.479 albertel 4779: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
1.31 www 4780: $thisfn=~s/^\///;
4781: $thisfn=~s/^res\///;
1.235 www 4782: $thisfn=~s/\?.+$//;
1.268 www 4783: return $thisfn;
4784: }
4785:
4786: # ------------------------------------------------------------- Clutter up URLs
4787:
4788: sub clutter {
4789: my $thisfn='/'.&declutter(shift);
1.270 www 4790: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
4791: $thisfn='/res'.$thisfn;
4792: }
1.31 www 4793: return $thisfn;
1.12 www 4794: }
4795:
4796: # -------------------------------------------------------- Escape Special Chars
4797:
4798: sub escape {
4799: my $str=shift;
4800: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
4801: return $str;
4802: }
4803:
4804: # ----------------------------------------------------- Un-Escape Special Chars
4805:
4806: sub unescape {
4807: my $str=shift;
4808: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
4809: return $str;
4810: }
1.11 www 4811:
1.415 albertel 4812: sub mod_perl_version {
4813: if (defined($perlvar{'MODPERL2'})) {
4814: return 2;
4815: }
4816: return 1;
1.436 albertel 4817: }
4818:
4819: sub correct_line_ends {
4820: my ($result)=@_;
4821: $$result =~s/\r\n/\n/mg;
4822: $$result =~s/\r/\n/mg;
1.415 albertel 4823: }
1.1 albertel 4824: # ================================================================ Main Program
4825:
1.184 www 4826: sub goodbye {
1.204 albertel 4827: &logthis("Starting Shut down");
1.443 albertel 4828: #not converted to using infrastruture and probably shouldn't be
1.425 albertel 4829: &logthis(sprintf("%-20s is %s",'%badServerCache',scalar(%badServerCache)));
1.443 albertel 4830: #converted
1.425 albertel 4831: &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
1.443 albertel 4832: &logthis(sprintf("%-20s is %s",'%homecache',scalar(%homecache)));
1.425 albertel 4833: &logthis(sprintf("%-20s is %s",'%titlecache',scalar(%titlecache)));
4834: &logthis(sprintf("%-20s is %s",'%courseresdatacache',scalar(%courseresdatacache)));
4835: #1.1 only
4836: &logthis(sprintf("%-20s is %s",'%userresdatacache',scalar(%userresdatacache)));
4837: &logthis(sprintf("%-20s is %s",'%usectioncache',scalar(%usectioncache)));
1.440 www 4838: &logthis(sprintf("%-20s is %s",'%courseresversioncache',scalar(%courseresversioncache)));
4839: &logthis(sprintf("%-20s is %s",'%resversioncache',scalar(%resversioncache)));
1.184 www 4840: &flushcourselogs();
4841: &logthis("Shutting down");
1.362 albertel 4842: return DONE;
1.184 www 4843: }
4844:
1.179 www 4845: BEGIN {
1.228 harris41 4846: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
1.195 www 4847: unless ($readit) {
1.217 harris41 4848: {
1.448 albertel 4849: open(my $config,"</etc/httpd/conf/loncapa.conf");
1.217 harris41 4850:
4851: while (my $configline=<$config>) {
1.484 albertel 4852: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
1.1 albertel 4853: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
1.8 www 4854: chomp($varvalue);
1.1 albertel 4855: $perlvar{$varname}=$varvalue;
4856: }
4857: }
1.448 albertel 4858: close($config);
1.1 albertel 4859: }
1.227 harris41 4860: {
1.448 albertel 4861: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
1.227 harris41 4862:
4863: while (my $configline=<$config>) {
4864: if ($configline =~ /^[^\#]*PerlSetVar/) {
4865: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
4866: chomp($varvalue);
4867: $perlvar{$varname}=$varvalue;
4868: }
4869: }
1.448 albertel 4870: close($config);
1.227 harris41 4871: }
1.1 albertel 4872:
1.327 albertel 4873: # ------------------------------------------------------------ Read domain file
4874: {
4875: %domaindescription = ();
4876: %domain_auth_def = ();
4877: %domain_auth_arg_def = ();
1.448 albertel 4878: my $fh;
4879: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
1.327 albertel 4880: while (<$fh>) {
1.390 matthew 4881: next if (/^(\#|\s*$)/);
4882: # next if /^\#/;
1.327 albertel 4883: chomp;
1.403 www 4884: my ($domain, $domain_description, $def_auth, $def_auth_arg,
4885: $def_lang, $city, $longi, $lati) = split(/:/,$_);
4886: $domain_auth_def{$domain}=$def_auth;
1.327 albertel 4887: $domain_auth_arg_def{$domain}=$def_auth_arg;
1.403 www 4888: $domaindescription{$domain}=$domain_description;
4889: $domain_lang_def{$domain}=$def_lang;
4890: $domain_city{$domain}=$city;
4891: $domain_longi{$domain}=$longi;
4892: $domain_lati{$domain}=$lati;
4893:
1.448 albertel 4894: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
1.327 albertel 4895: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
1.448 albertel 4896: }
1.327 albertel 4897: }
1.448 albertel 4898: close ($fh);
1.327 albertel 4899: }
4900:
4901:
1.1 albertel 4902: # ------------------------------------------------------------- Read hosts file
4903: {
1.448 albertel 4904: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
1.1 albertel 4905:
4906: while (my $configline=<$config>) {
1.303 matthew 4907: next if ($configline =~ /^(\#|\s*$)/);
1.154 www 4908: chomp($configline);
1.245 www 4909: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
1.252 albertel 4910: if ($id && $domain && $role && $name && $ip) {
4911: $hostname{$id}=$name;
4912: $hostdom{$id}=$domain;
4913: $hostip{$id}=$ip;
1.300 albertel 4914: $iphost{$ip}=$id;
1.252 albertel 4915: if ($role eq 'library') { $libserv{$id}=$name; }
4916: } else {
4917: if ($configline) {
4918: &logthis("Skipping hosts.tab line -$configline-");
4919: }
1.245 www 4920: }
1.1 albertel 4921: }
1.448 albertel 4922: close($config);
1.1 albertel 4923: }
4924:
4925: # ------------------------------------------------------ Read spare server file
4926: {
1.448 albertel 4927: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
1.1 albertel 4928:
4929: while (my $configline=<$config>) {
4930: chomp($configline);
1.284 matthew 4931: if ($configline) {
1.1 albertel 4932: $spareid{$configline}=1;
4933: }
4934: }
1.448 albertel 4935: close($config);
1.1 albertel 4936: }
1.11 www 4937: # ------------------------------------------------------------ Read permissions
4938: {
1.448 albertel 4939: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
1.11 www 4940:
4941: while (my $configline=<$config>) {
1.448 albertel 4942: chomp($configline);
4943: if ($configline) {
4944: my ($role,$perm)=split(/ /,$configline);
4945: if ($perm ne '') { $pr{$role}=$perm; }
4946: }
1.11 www 4947: }
1.448 albertel 4948: close($config);
1.11 www 4949: }
4950:
4951: # -------------------------------------------- Read plain texts for permissions
4952: {
1.448 albertel 4953: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
1.11 www 4954:
4955: while (my $configline=<$config>) {
1.448 albertel 4956: chomp($configline);
4957: if ($configline) {
4958: my ($short,$plain)=split(/:/,$configline);
4959: if ($plain ne '') { $prp{$short}=$plain; }
4960: }
1.135 www 4961: }
1.448 albertel 4962: close($config);
1.135 www 4963: }
4964:
4965: # ---------------------------------------------------------- Read package table
4966: {
1.448 albertel 4967: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
1.135 www 4968:
4969: while (my $configline=<$config>) {
1.483 albertel 4970: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
1.448 albertel 4971: chomp($configline);
4972: my ($short,$plain)=split(/:/,$configline);
4973: my ($pack,$name)=split(/\&/,$short);
4974: if ($plain ne '') {
4975: $packagetab{$pack.'&'.$name.'&name'}=$name;
4976: $packagetab{$short}=$plain;
4977: }
1.11 www 4978: }
1.448 albertel 4979: close($config);
1.329 matthew 4980: }
4981:
4982: # ------------- set up temporary directory
4983: {
4984: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
4985:
1.11 www 4986: }
4987:
1.71 www 4988: %metacache=();
1.185 www 4989:
1.281 www 4990: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
1.186 www 4991: $dumpcount=0;
1.22 www 4992:
1.163 harris41 4993: &logtouch();
1.12 www 4994: &logthis('<font color=yellow>INFO: Read configuration</font>');
1.195 www 4995: $readit=1;
4996: }
1.1 albertel 4997: }
1.179 www 4998:
1.1 albertel 4999: 1;
1.191 harris41 5000: __END__
5001:
1.243 albertel 5002: =pod
5003:
1.191 harris41 5004: =head1 NAME
5005:
1.243 albertel 5006: Apache::lonnet - Subroutines to ask questions about things in the network.
1.191 harris41 5007:
5008: =head1 SYNOPSIS
5009:
1.243 albertel 5010: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
1.191 harris41 5011:
5012: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
5013:
1.243 albertel 5014: Common parameters:
5015:
5016: =over 4
5017:
5018: =item *
5019:
5020: $uname : an internal username (if $cname expecting a course Id specifically)
5021:
5022: =item *
5023:
5024: $udom : a domain (if $cdom expecting a course's domain specifically)
5025:
5026: =item *
5027:
5028: $symb : a resource instance identifier
5029:
5030: =item *
5031:
5032: $namespace : the name of a .db file that contains the data needed or
5033: being set.
5034:
5035: =back
5036:
1.394 bowersj2 5037: =head1 OVERVIEW
1.191 harris41 5038:
1.394 bowersj2 5039: lonnet provides subroutines which interact with the
5040: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
5041: about classes, users, and resources.
1.243 albertel 5042:
5043: For many of these objects you can also use this to store data about
5044: them or modify them in various ways.
1.191 harris41 5045:
1.394 bowersj2 5046: =head2 Symbs
1.191 harris41 5047:
1.394 bowersj2 5048: To identify a specific instance of a resource, LON-CAPA uses symbols
5049: or "symbs"X<symb>. These identifiers are built from the URL of the
5050: map, the resource number of the resource in the map, and the URL of
5051: the resource itself. The latter is somewhat redundant, but might help
5052: if maps change.
5053:
5054: An example is
5055:
5056: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
5057:
5058: The respective map entry is
5059:
5060: <resource id="19" src="/res/msu/korte/tests/part12.problem"
5061: title="Problem 2">
5062: </resource>
5063:
5064: Symbs are used by the random number generator, as well as to store and
5065: restore data specific to a certain instance of for example a problem.
5066:
5067: =head2 Storing And Retrieving Data
5068:
5069: X<store()>X<cstore()>X<restore()>Three of the most important functions
5070: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
5071: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
5072: is is the non-critical message twin of cstore. These functions are for
5073: handlers to store a perl hash to a user's permanent data space in an
5074: easy manner, and to retrieve it again on another call. It is expected
5075: that a handler would use this once at the beginning to retrieve data,
5076: and then again once at the end to send only the new data back.
5077:
5078: The data is stored in the user's data directory on the user's
5079: homeserver under the ID of the course.
5080:
5081: The hash that is returned by restore will have all of the previous
5082: value for all of the elements of the hash.
5083:
5084: Example:
5085:
5086: #creating a hash
5087: my %hash;
5088: $hash{'foo'}='bar';
5089:
5090: #storing it
5091: &Apache::lonnet::cstore(\%hash);
5092:
5093: #changing a value
5094: $hash{'foo'}='notbar';
5095:
5096: #adding a new value
5097: $hash{'bar'}='foo';
5098: &Apache::lonnet::cstore(\%hash);
5099:
5100: #retrieving the hash
5101: my %history=&Apache::lonnet::restore();
5102:
5103: #print the hash
5104: foreach my $key (sort(keys(%history))) {
5105: print("\%history{$key} = $history{$key}");
5106: }
5107:
5108: Will print out:
1.191 harris41 5109:
1.394 bowersj2 5110: %history{1:foo} = bar
5111: %history{1:keys} = foo:timestamp
5112: %history{1:timestamp} = 990455579
5113: %history{2:bar} = foo
5114: %history{2:foo} = notbar
5115: %history{2:keys} = foo:bar:timestamp
5116: %history{2:timestamp} = 990455580
5117: %history{bar} = foo
5118: %history{foo} = notbar
5119: %history{timestamp} = 990455580
5120: %history{version} = 2
5121:
5122: Note that the special hash entries C<keys>, C<version> and
5123: C<timestamp> were added to the hash. C<version> will be equal to the
5124: total number of versions of the data that have been stored. The
5125: C<timestamp> attribute will be the UNIX time the hash was
5126: stored. C<keys> is available in every historical section to list which
5127: keys were added or changed at a specific historical revision of a
5128: hash.
5129:
5130: B<Warning>: do not store the hash that restore returns directly. This
5131: will cause a mess since it will restore the historical keys as if the
5132: were new keys. I.E. 1:foo will become 1:1:foo etc.
1.191 harris41 5133:
1.394 bowersj2 5134: Calling convention:
1.191 harris41 5135:
1.394 bowersj2 5136: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
5137: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
1.191 harris41 5138:
1.394 bowersj2 5139: For more detailed information, see lonnet specific documentation.
1.191 harris41 5140:
1.394 bowersj2 5141: =head1 RETURN MESSAGES
1.191 harris41 5142:
1.394 bowersj2 5143: =over 4
1.191 harris41 5144:
1.394 bowersj2 5145: =item * B<con_lost>: unable to contact remote host
1.191 harris41 5146:
1.394 bowersj2 5147: =item * B<con_delayed>: unable to contact remote host, message will be delivered
5148: when the connection is brought back up
1.191 harris41 5149:
1.394 bowersj2 5150: =item * B<con_failed>: unable to contact remote host and unable to save message
5151: for later delivery
1.191 harris41 5152:
1.394 bowersj2 5153: =item * B<error:>: an error a occured, a description of the error follows the :
1.191 harris41 5154:
1.394 bowersj2 5155: =item * B<no_such_host>: unable to fund a host associated with the user/domain
1.243 albertel 5156: that was requested
1.191 harris41 5157:
1.243 albertel 5158: =back
1.191 harris41 5159:
1.243 albertel 5160: =head1 PUBLIC SUBROUTINES
1.191 harris41 5161:
1.243 albertel 5162: =head2 Session Environment Functions
1.191 harris41 5163:
1.243 albertel 5164: =over 4
1.191 harris41 5165:
1.394 bowersj2 5166: =item *
5167: X<appenv()>
5168: B<appenv(%hash)>: the value of %hash is written to
5169: the user envirnoment file, and will be restored for each access this
5170: user makes during this session, also modifies the %ENV for the current
5171: process
1.191 harris41 5172:
5173: =item *
1.394 bowersj2 5174: X<delenv()>
5175: B<delenv($regexp)>: removes all items from the session
5176: environment file that matches the regular expression in $regexp. The
5177: values are also delted from the current processes %ENV.
1.191 harris41 5178:
1.243 albertel 5179: =back
5180:
5181: =head2 User Information
1.191 harris41 5182:
1.243 albertel 5183: =over 4
1.191 harris41 5184:
5185: =item *
1.394 bowersj2 5186: X<queryauthenticate()>
5187: B<queryauthenticate($uname,$udom)>: try to determine user's current
1.191 harris41 5188: authentication scheme
5189:
5190: =item *
1.394 bowersj2 5191: X<authenticate()>
5192: B<authenticate($uname,$upass,$udom)>: try to
5193: authenticate user from domain's lib servers (first use the current
5194: one). C<$upass> should be the users password.
1.191 harris41 5195:
5196: =item *
1.394 bowersj2 5197: X<homeserver()>
5198: B<homeserver($uname,$udom)>: find the server which has
5199: the user's directory and files (there must be only one), this caches
5200: the answer, and also caches if there is a borken connection.
1.191 harris41 5201:
5202: =item *
1.394 bowersj2 5203: X<idget()>
5204: B<idget($udom,@ids)>: find the usernames behind a list of IDs
5205: (IDs are a unique resource in a domain, there must be only 1 ID per
5206: username, and only 1 username per ID in a specific domain) (returns
5207: hash: id=>name,id=>name)
1.191 harris41 5208:
5209: =item *
1.394 bowersj2 5210: X<idrget()>
5211: B<idrget($udom,@unames)>: find the IDs behind a list of
5212: usernames (returns hash: name=>id,name=>id)
1.191 harris41 5213:
5214: =item *
1.394 bowersj2 5215: X<idput()>
5216: B<idput($udom,%ids)>: store away a list of names and associated IDs
1.191 harris41 5217:
5218: =item *
1.394 bowersj2 5219: X<rolesinit()>
5220: B<rolesinit($udom,$username,$authhost)>: get user privileges
1.243 albertel 5221:
5222: =item *
1.394 bowersj2 5223: X<usection()>
5224: B<usection($udom,$uname,$cname)>: finds the section of student in the
1.243 albertel 5225: course $cname, return section name/number or '' for "not in course"
5226: and '-1' for "no section"
5227:
5228: =item *
1.394 bowersj2 5229: X<userenvironment()>
5230: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
1.243 albertel 5231: passed in @what from the requested user's environment, returns a hash
5232:
5233: =back
5234:
5235: =head2 User Roles
5236:
5237: =over 4
5238:
5239: =item *
5240:
5241: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
5242: actions
5243: F: full access
5244: U,I,K: authentication modes (cxx only)
5245: '': forbidden
5246: 1: user needs to choose course
5247: 2: browse allowed
5248:
5249: =item *
5250:
5251: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
5252: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
5253: and course level
5254:
5255: =item *
5256:
5257: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
5258: explanation of a user role term
5259:
5260: =back
5261:
5262: =head2 User Modification
5263:
5264: =over 4
5265:
5266: =item *
5267:
5268: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
5269: user for the level given by URL. Optional start and end dates (leave empty
5270: string or zero for "no date")
1.191 harris41 5271:
5272: =item *
5273:
1.243 albertel 5274: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
5275: change a users, password, possible return values are: ok,
5276: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
5277: refused
1.191 harris41 5278:
5279: =item *
5280:
1.243 albertel 5281: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
1.191 harris41 5282:
5283: =item *
5284:
1.243 albertel 5285: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
5286: modify user
1.191 harris41 5287:
5288: =item *
5289:
1.286 matthew 5290: modifystudent
5291:
5292: modify a students enrollment and identification information.
5293: The course id is resolved based on the current users environment.
5294: This means the envoking user must be a course coordinator or otherwise
5295: associated with a course.
5296:
1.297 matthew 5297: This call is essentially a wrapper for lonnet::modifyuser and
5298: lonnet::modify_student_enrollment
1.286 matthew 5299:
5300: Inputs:
5301:
5302: =over 4
5303:
5304: =item B<$udom> Students loncapa domain
5305:
5306: =item B<$uname> Students loncapa login name
5307:
5308: =item B<$uid> Students id/student number
5309:
5310: =item B<$umode> Students authentication mode
5311:
5312: =item B<$upass> Students password
5313:
5314: =item B<$first> Students first name
5315:
5316: =item B<$middle> Students middle name
5317:
5318: =item B<$last> Students last name
5319:
5320: =item B<$gene> Students generation
5321:
5322: =item B<$usec> Students section in course
5323:
5324: =item B<$end> Unix time of the roles expiration
5325:
5326: =item B<$start> Unix time of the roles start date
5327:
5328: =item B<$forceid> If defined, allow $uid to be changed
5329:
5330: =item B<$desiredhome> server to use as home server for student
5331:
5332: =back
1.297 matthew 5333:
5334: =item *
5335:
5336: modify_student_enrollment
5337:
5338: Change a students enrollment status in a class. The environment variable
5339: 'role.request.course' must be defined for this function to proceed.
5340:
5341: Inputs:
5342:
5343: =over 4
5344:
5345: =item $udom, students domain
5346:
5347: =item $uname, students name
5348:
5349: =item $uid, students user id
5350:
5351: =item $first, students first name
5352:
5353: =item $middle
5354:
5355: =item $last
5356:
5357: =item $gene
5358:
5359: =item $usec
5360:
5361: =item $end
5362:
5363: =item $start
5364:
5365: =back
5366:
1.191 harris41 5367:
5368: =item *
5369:
1.243 albertel 5370: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
5371: custom role; give a custom role to a user for the level given by URL. Specify
5372: name and domain of role author, and role name
1.191 harris41 5373:
5374: =item *
5375:
1.243 albertel 5376: revokerole($udom,$uname,$url,$role) : revoke a role for url
1.191 harris41 5377:
5378: =item *
5379:
1.243 albertel 5380: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
5381:
5382: =back
5383:
5384: =head2 Course Infomation
5385:
5386: =over 4
1.191 harris41 5387:
5388: =item *
5389:
1.243 albertel 5390: coursedescription($courseid) : course description
1.191 harris41 5391:
5392: =item *
5393:
1.243 albertel 5394: courseresdata($coursenum,$coursedomain,@which) : request for current
5395: parameter setting for a specific course, @what should be a list of
5396: parameters to ask about. This routine caches answers for 5 minutes.
5397:
5398: =back
5399:
5400: =head2 Course Modification
5401:
5402: =over 4
1.191 harris41 5403:
5404: =item *
5405:
1.243 albertel 5406: writecoursepref($courseid,%prefs) : write preferences (environment
5407: database) for a course
1.191 harris41 5408:
5409: =item *
5410:
1.243 albertel 5411: createcourse($udom,$description,$url) : make/modify course
5412:
5413: =back
5414:
5415: =head2 Resource Subroutines
5416:
5417: =over 4
1.191 harris41 5418:
5419: =item *
5420:
1.243 albertel 5421: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
1.191 harris41 5422:
5423: =item *
5424:
1.243 albertel 5425: repcopy($filename) : subscribes to the requested file, and attempts to
5426: replicate from the owning library server, Might return
5427: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
5428: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
5429: resource. Expects the local filesystem pathname
5430: (/home/httpd/html/res/....)
5431:
5432: =back
5433:
5434: =head2 Resource Information
5435:
5436: =over 4
1.191 harris41 5437:
5438: =item *
5439:
1.243 albertel 5440: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
5441: a vairety of different possible values, $varname should be a request
5442: string, and the other parameters can be used to specify who and what
5443: one is asking about.
5444:
5445: Possible values for $varname are environment.lastname (or other item
5446: from the envirnment hash), user.name (or someother aspect about the
5447: user), resource.0.maxtries (or some other part and parameter of a
5448: resource)
1.204 albertel 5449:
5450: =item *
5451:
1.243 albertel 5452: directcondval($number) : get current value of a condition; reads from a state
5453: string
1.204 albertel 5454:
5455: =item *
5456:
1.243 albertel 5457: condval($condidx) : value of condition index based on state
1.204 albertel 5458:
5459: =item *
5460:
1.243 albertel 5461: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
5462: resource's metadata, $what should be either a specific key, or either
5463: 'keys' (to get a list of possible keys) or 'packages' to get a list of
5464: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
5465:
5466: this function automatically caches all requests
1.191 harris41 5467:
5468: =item *
5469:
1.243 albertel 5470: metadata_query($query,$custom,$customshow) : make a metadata query against the
5471: network of library servers; returns file handle of where SQL and regex results
5472: will be stored for query
1.191 harris41 5473:
5474: =item *
5475:
1.243 albertel 5476: symbread($filename) : return symbolic list entry (filename argument optional);
5477: returns the data handle
1.191 harris41 5478:
5479: =item *
5480:
1.243 albertel 5481: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
5482: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
5483: failure, user must be in a course, as it assumes the existance of the
5484: course initi hash, and uses $ENV('request.course.id'}
5485:
1.191 harris41 5486:
5487: =item *
5488:
1.243 albertel 5489: symbclean($symb) : removes versions numbers from a symb, returns the
5490: cleaned symb
1.191 harris41 5491:
5492: =item *
5493:
1.243 albertel 5494: is_on_map($uri) : checks if the $uri is somewhere on the current
5495: course map, user must be in a course for it to work.
1.191 harris41 5496:
5497: =item *
5498:
1.243 albertel 5499: numval($salt) : return random seed value (addend for rndseed)
1.191 harris41 5500:
5501: =item *
5502:
1.243 albertel 5503: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
5504: a random seed, all arguments are optional, if they aren't sent it uses the
5505: environment to derive them. Note: if symb isn't sent and it can't get one
5506: from &symbread it will use the current time as its return value
1.191 harris41 5507:
5508: =item *
5509:
1.243 albertel 5510: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
5511: unfakeable, receipt
1.191 harris41 5512:
5513: =item *
5514:
1.243 albertel 5515: receipt() : API to ireceipt working off of ENV values; given out to users
1.191 harris41 5516:
5517: =item *
5518:
1.243 albertel 5519: countacc($url) : count the number of accesses to a given URL
1.191 harris41 5520:
5521: =item *
5522:
1.243 albertel 5523: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
1.191 harris41 5524:
5525: =item *
5526:
1.243 albertel 5527: checkin($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 $tcrsid)
1.191 harris41 5528:
5529: =item *
5530:
1.243 albertel 5531: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
1.191 harris41 5532:
5533: =item *
5534:
1.243 albertel 5535: devalidate($symb) : devalidate temporary spreadsheet calculations,
5536: forcing spreadsheet to reevaluate the resource scores next time.
5537:
5538: =back
5539:
5540: =head2 Storing/Retreiving Data
5541:
5542: =over 4
1.191 harris41 5543:
5544: =item *
5545:
1.243 albertel 5546: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
5547: for this url; hashref needs to be given and should be a \%hashname; the
5548: remaining args aren't required and if they aren't passed or are '' they will
5549: be derived from the ENV
1.191 harris41 5550:
5551: =item *
5552:
1.243 albertel 5553: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
5554: uses critical subroutine
1.191 harris41 5555:
5556: =item *
5557:
1.243 albertel 5558: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
5559: all args are optional
1.191 harris41 5560:
5561: =item *
5562:
1.243 albertel 5563: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
5564: works very similar to store/cstore, but all data is stored in a
5565: temporary location and can be reset using tmpreset, $storehash should
5566: be a hash reference, returns nothing on success
1.191 harris41 5567:
5568: =item *
5569:
1.243 albertel 5570: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
5571: similar to restore, but all data is stored in a temporary location and
5572: can be reset using tmpreset. Returns a hash of values on success,
5573: error string otherwise.
1.191 harris41 5574:
5575: =item *
5576:
1.243 albertel 5577: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
5578: deltes all keys for $symb form the temporary storage hash.
1.191 harris41 5579:
5580: =item *
5581:
1.243 albertel 5582: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5583: reference filled in from namesp ($udom and $uname are optional)
1.191 harris41 5584:
5585: =item *
5586:
1.243 albertel 5587: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
5588: namesp ($udom and $uname are optional)
1.191 harris41 5589:
5590: =item *
5591:
1.243 albertel 5592: dump($namespace,$udom,$uname,$regexp) :
5593: dumps the complete (or key matching regexp) namespace into a hash
5594: ($udom, $uname and $regexp are optional)
1.449 matthew 5595:
5596: =item *
5597:
5598: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
5599: $store can be a scalar, an array reference, or if the amount to be
5600: incremented is > 1, a hash reference.
5601:
5602: ($udom and $uname are optional)
1.191 harris41 5603:
5604: =item *
5605:
1.243 albertel 5606: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
5607: ($udom and $uname are optional)
1.191 harris41 5608:
5609: =item *
5610:
1.243 albertel 5611: cput($namespace,$storehash,$udom,$uname) : critical put
5612: ($udom and $uname are optional)
1.191 harris41 5613:
5614: =item *
5615:
1.243 albertel 5616: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5617: reference filled in from namesp (encrypts the return communication)
5618: ($udom and $uname are optional)
1.191 harris41 5619:
5620: =item *
5621:
1.243 albertel 5622: log($udom,$name,$home,$message) : write to permanent log for user; use
5623: critical subroutine
5624:
5625: =back
5626:
5627: =head2 Network Status Functions
5628:
5629: =over 4
1.191 harris41 5630:
5631: =item *
5632:
5633: dirlist($uri) : return directory list based on URI
5634:
5635: =item *
5636:
1.243 albertel 5637: spareserver() : find server with least workload from spare.tab
5638:
5639: =back
5640:
5641: =head2 Apache Request
5642:
5643: =over 4
1.191 harris41 5644:
5645: =item *
5646:
1.243 albertel 5647: ssi($url,%hash) : server side include, does a complete request cycle on url to
5648: localhost, posts hash
5649:
5650: =back
5651:
5652: =head2 Data to String to Data
5653:
5654: =over 4
1.191 harris41 5655:
5656: =item *
5657:
1.243 albertel 5658: hash2str(%hash) : convert a hash into a string complete with escaping and '='
5659: and '&' separators, supports elements that are arrayrefs and hashrefs
1.191 harris41 5660:
5661: =item *
5662:
1.243 albertel 5663: hashref2str($hashref) : convert a hashref into a string complete with
5664: escaping and '=' and '&' separators, supports elements that are
5665: arrayrefs and hashrefs
1.191 harris41 5666:
5667: =item *
5668:
1.243 albertel 5669: arrayref2str($arrayref) : convert an arrayref into a string complete
5670: with escaping and '&' separators, supports elements that are arrayrefs
5671: and hashrefs
1.191 harris41 5672:
5673: =item *
5674:
1.243 albertel 5675: str2hash($string) : convert string to hash using unescaping and
5676: splitting on '=' and '&', supports elements that are arrayrefs and
5677: hashrefs
1.191 harris41 5678:
5679: =item *
5680:
1.243 albertel 5681: str2array($string) : convert string to hash using unescaping and
5682: splitting on '&', supports elements that are arrayrefs and hashrefs
5683:
5684: =back
5685:
5686: =head2 Logging Routines
5687:
5688: =over 4
5689:
5690: These routines allow one to make log messages in the lonnet.log and
5691: lonnet.perm logfiles.
1.191 harris41 5692:
5693: =item *
5694:
1.243 albertel 5695: logtouch() : make sure the logfile, lonnet.log, exists
1.191 harris41 5696:
5697: =item *
5698:
1.243 albertel 5699: logthis() : append message to the normal lonnet.log file, it gets
5700: preiodically rolled over and deleted.
1.191 harris41 5701:
5702: =item *
5703:
1.243 albertel 5704: logperm() : append a permanent message to lonnet.perm.log, this log
5705: file never gets deleted by any automated portion of the system, only
5706: messages of critical importance should go in here.
5707:
5708: =back
5709:
5710: =head2 General File Helper Routines
5711:
5712: =over 4
1.191 harris41 5713:
5714: =item *
5715:
1.481 raeburn 5716: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
5717: (a) files in /uploaded
5718: (i) If a local copy of the file exists -
5719: compares modification date of local copy with last-modified date for
5720: definitive version stored on home server for course. If local copy is
5721: stale, requests a new version from the home server and stores it.
5722: If the original has been removed from the home server, then local copy
5723: is unlinked.
5724: (ii) If local copy does not exist -
5725: requests the file from the home server and stores it.
5726:
5727: If $caller is 'uploadrep':
5728: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
5729: for request for files originally uploaded via DOCS.
5730: - returns 'ok' if fresh local copy now available, -1 otherwise.
5731:
5732: Otherwise:
5733: This indicates a call from the content generation phase of the request.
5734: - returns the entire contents of the file or -1.
5735:
5736: (b) files in /res
5737: - returns the entire contents of a file or -1;
5738: it properly subscribes to and replicates the file if neccessary.
1.191 harris41 5739:
5740: =item *
5741:
1.243 albertel 5742: filelocation($dir,$file) : returns file system location of a file
5743: based on URI; meant to be "fairly clean" absolute reference, $dir is a
5744: directory that relative $file lookups are to looked in ($dir of /a/dir
5745: and a file of ../bob will become /a/bob)
1.191 harris41 5746:
5747: =item *
5748:
5749: hreflocation($dir,$file) : returns file system location or a URL; same as
5750: filelocation except for hrefs
5751:
5752: =item *
5753:
5754: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
5755:
1.243 albertel 5756: =back
5757:
5758: =head2 HTTP Helper Routines
5759:
5760: =over 4
5761:
1.191 harris41 5762: =item *
5763:
5764: escape() : unpack non-word characters into CGI-compatible hex codes
5765:
5766: =item *
5767:
5768: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
5769:
1.243 albertel 5770: =back
5771:
5772: =head1 PRIVATE SUBROUTINES
5773:
5774: =head2 Underlying communication routines (Shouldn't call)
5775:
5776: =over 4
5777:
5778: =item *
5779:
5780: subreply() : tries to pass a message to lonc, returns con_lost if incapable
5781:
5782: =item *
5783:
5784: reply() : uses subreply to send a message to remote machine, logs all failures
5785:
5786: =item *
5787:
5788: critical() : passes a critical message to another server; if cannot
5789: get through then place message in connection buffer directory and
5790: returns con_delayed, if incapable of saving message, returns
5791: con_failed
5792:
5793: =item *
5794:
5795: reconlonc() : tries to reconnect lonc client processes.
5796:
5797: =back
5798:
5799: =head2 Resource Access Logging
5800:
5801: =over 4
5802:
5803: =item *
5804:
5805: flushcourselogs() : flush (save) buffer logs and access logs
5806:
5807: =item *
5808:
5809: courselog($what) : save message for course in hash
5810:
5811: =item *
5812:
5813: courseacclog($what) : save message for course using &courselog(). Perform
5814: special processing for specific resource types (problems, exams, quizzes, etc).
5815:
1.191 harris41 5816: =item *
5817:
5818: goodbye() : flush course logs and log shutting down; it is called in srm.conf
5819: as a PerlChildExitHandler
1.243 albertel 5820:
5821: =back
5822:
5823: =head2 Other
5824:
5825: =over 4
5826:
5827: =item *
5828:
5829: symblist($mapname,%newhash) : update symbolic storage links
1.191 harris41 5830:
5831: =back
5832:
5833: =cut
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