1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.913 2007/09/25 00:21:12 albertel Exp $
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: #
28: ###
29:
30: package Apache::lonnet;
31:
32: use strict;
33: use LWP::UserAgent();
34: use HTTP::Date;
35: # use Date::Parse;
36: use vars qw(%perlvar %spareid %pr %prp $memcache %packagetab $tmpdir
37: $_64bit %env);
38:
39: my (%badServerCache, $memcache, %courselogs, %accesshash, %domainrolehash,
40: %userrolehash, $processmarker, $dumpcount, %coursedombuf,
41: %coursenumbuf, %coursehombuf, %coursedescrbuf, %courseinstcodebuf,
42: %courseownerbuf, %coursetypebuf);
43:
44: use IO::Socket;
45: use GDBM_File;
46: use HTML::LCParser;
47: use Fcntl qw(:flock);
48: use Storable qw(thaw nfreeze);
49: use Time::HiRes qw( gettimeofday tv_interval );
50: use Cache::Memcached;
51: use Digest::MD5;
52: use Math::Random;
53: use LONCAPA qw(:DEFAULT :match);
54: use LONCAPA::Configuration;
55:
56: my $readit;
57: my $max_connection_retries = 10; # Or some such value.
58:
59: require Exporter;
60:
61: our @ISA = qw (Exporter);
62: our @EXPORT = qw(%env);
63:
64: =pod
65:
66: =head1 Package Variables
67:
68: These are largely undocumented, so if you decipher one please note it here.
69:
70: =over 4
71:
72: =item $processmarker
73:
74: Contains the time this process was started and this servers host id.
75:
76: =item $dumpcount
77:
78: Counts the number of times a message log flush has been attempted (regardless
79: of success) by this process. Used as part of the filename when messages are
80: delayed.
81:
82: =back
83:
84: =cut
85:
86:
87: # --------------------------------------------------------------------- Logging
88: {
89: my $logid;
90: sub instructor_log {
91: my ($hash_name,$storehash,$delflag,$uname,$udom)=@_;
92: $logid++;
93: my $id=time().'00000'.$$.'00000'.$logid;
94: return &Apache::lonnet::put('nohist_'.$hash_name,
95: { $id => {
96: 'exe_uname' => $env{'user.name'},
97: 'exe_udom' => $env{'user.domain'},
98: 'exe_time' => time(),
99: 'exe_ip' => $ENV{'REMOTE_ADDR'},
100: 'delflag' => $delflag,
101: 'logentry' => $storehash,
102: 'uname' => $uname,
103: 'udom' => $udom,
104: }
105: },
106: $env{'course.'.$env{'request.course.id'}.'.domain'},
107: $env{'course.'.$env{'request.course.id'}.'.num'}
108: );
109: }
110: }
111:
112: sub logtouch {
113: my $execdir=$perlvar{'lonDaemons'};
114: unless (-e "$execdir/logs/lonnet.log") {
115: open(my $fh,">>$execdir/logs/lonnet.log");
116: close $fh;
117: }
118: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
119: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
120: }
121:
122: sub logthis {
123: my $message=shift;
124: my $execdir=$perlvar{'lonDaemons'};
125: my $now=time;
126: my $local=localtime($now);
127: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
128: print $fh "$local ($$): $message\n";
129: close($fh);
130: }
131: return 1;
132: }
133:
134: sub logperm {
135: my $message=shift;
136: my $execdir=$perlvar{'lonDaemons'};
137: my $now=time;
138: my $local=localtime($now);
139: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
140: print $fh "$now:$message:$local\n";
141: close($fh);
142: }
143: return 1;
144: }
145:
146: sub create_connection {
147: my ($hostname,$lonid) = @_;
148: my $client=IO::Socket::UNIX->new(Peer => $perlvar{'lonSockCreate'},
149: Type => SOCK_STREAM,
150: Timeout => 10);
151: return 0 if (!$client);
152: print $client (join(':',$hostname,$lonid,&machine_ids($hostname))."\n");
153: my $result = <$client>;
154: chomp($result);
155: return 1 if ($result eq 'done');
156: return 0;
157: }
158:
159:
160: # -------------------------------------------------- Non-critical communication
161: sub subreply {
162: my ($cmd,$server)=@_;
163: my $peerfile="$perlvar{'lonSockDir'}/".&hostname($server);
164: #
165: # With loncnew process trimming, there's a timing hole between lonc server
166: # process exit and the master server picking up the listen on the AF_UNIX
167: # socket. In that time interval, a lock file will exist:
168:
169: my $lockfile=$peerfile.".lock";
170: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
171: sleep(1);
172: }
173: # At this point, either a loncnew parent is listening or an old lonc
174: # or loncnew child is listening so we can connect or everything's dead.
175: #
176: # We'll give the connection a few tries before abandoning it. If
177: # connection is not possible, we'll con_lost back to the client.
178: #
179: my $client;
180: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
181: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
182: Type => SOCK_STREAM,
183: Timeout => 10);
184: if ($client) {
185: last; # Connected!
186: } else {
187: &create_connection(&hostname($server),$server);
188: }
189: sleep(1); # Try again later if failed connection.
190: }
191: my $answer;
192: if ($client) {
193: print $client "sethost:$server:$cmd\n";
194: $answer=<$client>;
195: if (!$answer) { $answer="con_lost"; }
196: chomp($answer);
197: } else {
198: $answer = 'con_lost'; # Failed connection.
199: }
200: return $answer;
201: }
202:
203: sub reply {
204: my ($cmd,$server)=@_;
205: unless (defined(&hostname($server))) { return 'no_such_host'; }
206: my $answer=subreply($cmd,$server);
207: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
208: &logthis("<font color=\"blue\">WARNING:".
209: " $cmd to $server returned $answer</font>");
210: }
211: return $answer;
212: }
213:
214: # ----------------------------------------------------------- Send USR1 to lonc
215:
216: sub reconlonc {
217: my ($lonid) = @_;
218: my $hostname = &hostname($lonid);
219: if ($lonid) {
220: my $peerfile="$perlvar{'lonSockDir'}/$hostname";
221: if ($hostname && -e $peerfile) {
222: &logthis("Trying to reconnect lonc for $lonid ($hostname)");
223: my $client=IO::Socket::UNIX->new(Peer => $peerfile,
224: Type => SOCK_STREAM,
225: Timeout => 10);
226: if ($client) {
227: print $client ("reset_retries\n");
228: my $answer=<$client>;
229: #reset just this one.
230: }
231: }
232: return;
233: }
234:
235: &logthis("Trying to reconnect lonc");
236: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
237: if (open(my $fh,"<$loncfile")) {
238: my $loncpid=<$fh>;
239: chomp($loncpid);
240: if (kill 0 => $loncpid) {
241: &logthis("lonc at pid $loncpid responding, sending USR1");
242: kill USR1 => $loncpid;
243: sleep 1;
244: } else {
245: &logthis(
246: "<font color=\"blue\">WARNING:".
247: " lonc at pid $loncpid not responding, giving up</font>");
248: }
249: } else {
250: &logthis('<font color="blue">WARNING: lonc not running, giving up</font>');
251: }
252: }
253:
254: # ------------------------------------------------------ Critical communication
255:
256: sub critical {
257: my ($cmd,$server)=@_;
258: unless (&hostname($server)) {
259: &logthis("<font color=\"blue\">WARNING:".
260: " Critical message to unknown server ($server)</font>");
261: return 'no_such_host';
262: }
263: my $answer=reply($cmd,$server);
264: if ($answer eq 'con_lost') {
265: &reconlonc("$perlvar{'lonSockDir'}/$server");
266: my $answer=reply($cmd,$server);
267: if ($answer eq 'con_lost') {
268: my $now=time;
269: my $middlename=$cmd;
270: $middlename=substr($middlename,0,16);
271: $middlename=~s/\W//g;
272: my $dfilename=
273: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
274: $dumpcount++;
275: {
276: my $dfh;
277: if (open($dfh,">$dfilename")) {
278: print $dfh "$cmd\n";
279: close($dfh);
280: }
281: }
282: sleep 2;
283: my $wcmd='';
284: {
285: my $dfh;
286: if (open($dfh,"<$dfilename")) {
287: $wcmd=<$dfh>;
288: close($dfh);
289: }
290: }
291: chomp($wcmd);
292: if ($wcmd eq $cmd) {
293: &logthis("<font color=\"blue\">WARNING: ".
294: "Connection buffer $dfilename: $cmd</font>");
295: &logperm("D:$server:$cmd");
296: return 'con_delayed';
297: } else {
298: &logthis("<font color=\"red\">CRITICAL:"
299: ." Critical connection failed: $server $cmd</font>");
300: &logperm("F:$server:$cmd");
301: return 'con_failed';
302: }
303: }
304: }
305: return $answer;
306: }
307:
308: # ------------------------------------------- check if return value is an error
309:
310: sub error {
311: my ($result) = @_;
312: if ($result =~ /^(con_lost|no_such_host|error: (\d+) (.*))/) {
313: if ($2 == 2) { return undef; }
314: return $1;
315: }
316: return undef;
317: }
318:
319: sub convert_and_load_session_env {
320: my ($lonidsdir,$handle)=@_;
321: my @profile;
322: {
323: open(my $idf,"$lonidsdir/$handle.id");
324: flock($idf,LOCK_SH);
325: @profile=<$idf>;
326: close($idf);
327: }
328: my %temp_env;
329: foreach my $line (@profile) {
330: if ($line !~ m/=/) {
331: return 0;
332: }
333: chomp($line);
334: my ($envname,$envvalue)=split(/=/,$line,2);
335: $temp_env{&unescape($envname)} = &unescape($envvalue);
336: }
337: unlink("$lonidsdir/$handle.id");
338: if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",&GDBM_WRCREAT(),
339: 0640)) {
340: %disk_env = %temp_env;
341: @env{keys(%temp_env)} = @disk_env{keys(%temp_env)};
342: untie(%disk_env);
343: }
344: return 1;
345: }
346:
347: # ------------------------------------------- Transfer profile into environment
348: my $env_loaded;
349: sub transfer_profile_to_env {
350: my ($lonidsdir,$handle,$force_transfer) = @_;
351: if (!$force_transfer && $env_loaded) { return; }
352:
353: if (!defined($lonidsdir)) {
354: $lonidsdir = $perlvar{'lonIDsDir'};
355: }
356: if (!defined($handle)) {
357: ($handle) = ($env{'user.environment'} =~m|/([^/]+)\.id$| );
358: }
359:
360: my $convert;
361: {
362: open(my $idf,"$lonidsdir/$handle.id");
363: flock($idf,LOCK_SH);
364: if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",
365: &GDBM_READER(),0640)) {
366: @env{keys(%disk_env)} = @disk_env{keys(%disk_env)};
367: untie(%disk_env);
368: } else {
369: $convert = 1;
370: }
371: }
372: if ($convert) {
373: if (!&convert_and_load_session_env($lonidsdir,$handle)) {
374: &logthis("Failed to load session, or convert session.");
375: }
376: }
377:
378: my %remove;
379: while ( my $envname = each(%env) ) {
380: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
381: if ($time < time-300) {
382: $remove{$key}++;
383: }
384: }
385: }
386:
387: $env{'user.environment'} = "$lonidsdir/$handle.id";
388: $env_loaded=1;
389: foreach my $expired_key (keys(%remove)) {
390: &delenv($expired_key);
391: }
392: }
393:
394: sub timed_flock {
395: my ($file,$lock_type) = @_;
396: my $failed=0;
397: eval {
398: local $SIG{__DIE__}='DEFAULT';
399: local $SIG{ALRM}=sub {
400: $failed=1;
401: die("failed lock");
402: };
403: alarm(13);
404: flock($file,$lock_type);
405: alarm(0);
406: };
407: if ($failed) {
408: return undef;
409: } else {
410: return 1;
411: }
412: }
413:
414: # ---------------------------------------------------------- Append Environment
415:
416: sub appenv {
417: my %newenv=@_;
418: foreach my $key (keys(%newenv)) {
419: if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
420: &logthis("<font color=\"blue\">WARNING: ".
421: "Attempt to modify environment ".$key." to ".$newenv{$key}
422: .'</font>');
423: delete($newenv{$key});
424: } else {
425: $env{$key}=$newenv{$key};
426: }
427: }
428: open(my $env_file,$env{'user.environment'});
429: if (&timed_flock($env_file,LOCK_EX)
430: &&
431: tie(my %disk_env,'GDBM_File',$env{'user.environment'},
432: (&GDBM_WRITER()|&GDBM_NOLOCK()),0640)) {
433: while (my ($key,$value) = each(%newenv)) {
434: $disk_env{$key} = $value;
435: }
436: untie(%disk_env);
437: }
438: return 'ok';
439: }
440: # ----------------------------------------------------- Delete from Environment
441:
442: sub delenv {
443: my $delthis=shift;
444: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
445: &logthis("<font color=\"blue\">WARNING: ".
446: "Attempt to delete from environment ".$delthis);
447: return 'error';
448: }
449: open(my $env_file,$env{'user.environment'});
450: if (&timed_flock($env_file,LOCK_EX)
451: &&
452: tie(my %disk_env,'GDBM_File',$env{'user.environment'},
453: (&GDBM_WRITER()|&GDBM_NOLOCK()),0640)) {
454: foreach my $key (keys(%disk_env)) {
455: if ($key=~/^$delthis/) {
456: delete($env{$key});
457: delete($disk_env{$key});
458: }
459: }
460: untie(%disk_env);
461: }
462: return 'ok';
463: }
464:
465: sub get_env_multiple {
466: my ($name) = @_;
467: my @values;
468: if (defined($env{$name})) {
469: # exists is it an array
470: if (ref($env{$name})) {
471: @values=@{ $env{$name} };
472: } else {
473: $values[0]=$env{$name};
474: }
475: }
476: return(@values);
477: }
478:
479: # ------------------------------------------ Find out current server userload
480: # there is a copy in lond
481: sub userload {
482: my $numusers=0;
483: {
484: opendir(LONIDS,$perlvar{'lonIDsDir'});
485: my $filename;
486: my $curtime=time;
487: while ($filename=readdir(LONIDS)) {
488: if ($filename eq '.' || $filename eq '..') {next;}
489: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
490: if ($curtime-$mtime < 1800) { $numusers++; }
491: }
492: closedir(LONIDS);
493: }
494: my $userloadpercent=0;
495: my $maxuserload=$perlvar{'lonUserLoadLim'};
496: if ($maxuserload) {
497: $userloadpercent=100*$numusers/$maxuserload;
498: }
499: $userloadpercent=sprintf("%.2f",$userloadpercent);
500: return $userloadpercent;
501: }
502:
503: # ------------------------------------------ Fight off request when overloaded
504:
505: sub overloaderror {
506: my ($r,$checkserver)=@_;
507: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
508: my $loadavg;
509: if ($checkserver eq $perlvar{'lonHostID'}) {
510: open(my $loadfile,'/proc/loadavg');
511: $loadavg=<$loadfile>;
512: $loadavg =~ s/\s.*//g;
513: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
514: close($loadfile);
515: } else {
516: $loadavg=&reply('load',$checkserver);
517: }
518: my $overload=$loadavg-100;
519: if ($overload>0) {
520: $r->err_headers_out->{'Retry-After'}=$overload;
521: $r->log_error('Overload of '.$overload.' on '.$checkserver);
522: return 413;
523: }
524: return '';
525: }
526:
527: # ------------------------------ Find server with least workload from spare.tab
528:
529: sub spareserver {
530: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
531: my $spare_server;
532: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
533: my $lowest_load=($loadpercent > $userloadpercent) ? $loadpercent
534: : $userloadpercent;
535:
536: foreach my $try_server (@{ $spareid{'primary'} }) {
537: ($spare_server, $lowest_load) =
538: &compare_server_load($try_server, $spare_server, $lowest_load);
539: }
540:
541: my $found_server = ($spare_server ne '' && $lowest_load < 100);
542:
543: if (!$found_server) {
544: foreach my $try_server (@{ $spareid{'default'} }) {
545: ($spare_server, $lowest_load) =
546: &compare_server_load($try_server, $spare_server, $lowest_load);
547: }
548: }
549:
550: if (!$want_server_name) {
551: $spare_server="http://".&hostname($spare_server);
552: }
553: return $spare_server;
554: }
555:
556: sub compare_server_load {
557: my ($try_server, $spare_server, $lowest_load) = @_;
558:
559: my $loadans = &reply('load', $try_server);
560: my $userloadans = &reply('userload',$try_server);
561:
562: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
563: next; #didn't get a number from the server
564: }
565:
566: my $load;
567: if ($loadans =~ /\d/) {
568: if ($userloadans =~ /\d/) {
569: #both are numbers, pick the bigger one
570: $load = ($loadans > $userloadans) ? $loadans
571: : $userloadans;
572: } else {
573: $load = $loadans;
574: }
575: } else {
576: $load = $userloadans;
577: }
578:
579: if (($load =~ /\d/) && ($load < $lowest_load)) {
580: $spare_server = $try_server;
581: $lowest_load = $load;
582: }
583: return ($spare_server,$lowest_load);
584: }
585: # --------------------------------------------- Try to change a user's password
586:
587: sub changepass {
588: my ($uname,$udom,$currentpass,$newpass,$server,$context)=@_;
589: $currentpass = &escape($currentpass);
590: $newpass = &escape($newpass);
591: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass:$context",
592: $server);
593: if (! $answer) {
594: &logthis("No reply on password change request to $server ".
595: "by $uname in domain $udom.");
596: } elsif ($answer =~ "^ok") {
597: &logthis("$uname in $udom successfully changed their password ".
598: "on $server.");
599: } elsif ($answer =~ "^pwchange_failure") {
600: &logthis("$uname in $udom was unable to change their password ".
601: "on $server. The action was blocked by either lcpasswd ".
602: "or pwchange");
603: } elsif ($answer =~ "^non_authorized") {
604: &logthis("$uname in $udom did not get their password correct when ".
605: "attempting to change it on $server.");
606: } elsif ($answer =~ "^auth_mode_error") {
607: &logthis("$uname in $udom attempted to change their password despite ".
608: "not being locally or internally authenticated on $server.");
609: } elsif ($answer =~ "^unknown_user") {
610: &logthis("$uname in $udom attempted to change their password ".
611: "on $server but were unable to because $server is not ".
612: "their home server.");
613: } elsif ($answer =~ "^refused") {
614: &logthis("$server refused to change $uname in $udom password because ".
615: "it was sent an unencrypted request to change the password.");
616: }
617: return $answer;
618: }
619:
620: # ----------------------- Try to determine user's current authentication scheme
621:
622: sub queryauthenticate {
623: my ($uname,$udom)=@_;
624: my $uhome=&homeserver($uname,$udom);
625: if (!$uhome) {
626: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
627: return 'no_host';
628: }
629: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
630: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
631: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
632: }
633: return $answer;
634: }
635:
636: # --------- Try to authenticate user from domain's lib servers (first this one)
637:
638: sub authenticate {
639: my ($uname,$upass,$udom)=@_;
640: $upass=&escape($upass);
641: $uname= &LONCAPA::clean_username($uname);
642: my $uhome=&homeserver($uname,$udom,1);
643: if ((!$uhome) || ($uhome eq 'no_host')) {
644: # Maybe the machine was offline and only re-appeared again recently?
645: &reconlonc();
646: # One more
647: my $uhome=&homeserver($uname,$udom,1);
648: if ((!$uhome) || ($uhome eq 'no_host')) {
649: &logthis("User $uname at $udom is unknown in authenticate");
650: }
651: return 'no_host';
652: }
653: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
654: if ($answer eq 'authorized') {
655: &logthis("User $uname at $udom authorized by $uhome");
656: return $uhome;
657: }
658: if ($answer eq 'non_authorized') {
659: &logthis("User $uname at $udom rejected by $uhome");
660: return 'no_host';
661: }
662: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
663: return 'no_host';
664: }
665:
666: # ---------------------- Find the homebase for a user from domain's lib servers
667:
668: my %homecache;
669: sub homeserver {
670: my ($uname,$udom,$ignoreBadCache)=@_;
671: my $index="$uname:$udom";
672:
673: if (exists($homecache{$index})) { return $homecache{$index}; }
674:
675: my %servers = &get_servers($udom,'library');
676: foreach my $tryserver (keys(%servers)) {
677: next if ($ignoreBadCache ne 'true' &&
678: exists($badServerCache{$tryserver}));
679:
680: my $answer=reply("home:$udom:$uname",$tryserver);
681: if ($answer eq 'found') {
682: delete($badServerCache{$tryserver});
683: return $homecache{$index}=$tryserver;
684: } elsif ($answer eq 'no_host') {
685: $badServerCache{$tryserver}=1;
686: }
687: }
688: return 'no_host';
689: }
690:
691: # ------------------------------------- Find the usernames behind a list of IDs
692:
693: sub idget {
694: my ($udom,@ids)=@_;
695: my %returnhash=();
696:
697: my %servers = &get_servers($udom,'library');
698: foreach my $tryserver (keys(%servers)) {
699: my $idlist=join('&',@ids);
700: $idlist=~tr/A-Z/a-z/;
701: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
702: my @answer=();
703: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
704: @answer=split(/\&/,$reply);
705: } ;
706: my $i;
707: for ($i=0;$i<=$#ids;$i++) {
708: if ($answer[$i]) {
709: $returnhash{$ids[$i]}=$answer[$i];
710: }
711: }
712: }
713: return %returnhash;
714: }
715:
716: # ------------------------------------- Find the IDs behind a list of usernames
717:
718: sub idrget {
719: my ($udom,@unames)=@_;
720: my %returnhash=();
721: foreach my $uname (@unames) {
722: $returnhash{$uname}=(&userenvironment($udom,$uname,'id'))[1];
723: }
724: return %returnhash;
725: }
726:
727: # ------------------------------- Store away a list of names and associated IDs
728:
729: sub idput {
730: my ($udom,%ids)=@_;
731: my %servers=();
732: foreach my $uname (keys(%ids)) {
733: &cput('environment',{'id'=>$ids{$uname}},$udom,$uname);
734: my $uhom=&homeserver($uname,$udom);
735: if ($uhom ne 'no_host') {
736: my $id=&escape($ids{$uname});
737: $id=~tr/A-Z/a-z/;
738: my $esc_unam=&escape($uname);
739: if ($servers{$uhom}) {
740: $servers{$uhom}.='&'.$id.'='.$esc_unam;
741: } else {
742: $servers{$uhom}=$id.'='.$esc_unam;
743: }
744: }
745: }
746: foreach my $server (keys(%servers)) {
747: &critical('idput:'.$udom.':'.$servers{$server},$server);
748: }
749: }
750:
751: # ------------------------------------------- get items from domain db files
752:
753: sub get_dom {
754: my ($namespace,$storearr,$udom,$uhome)=@_;
755: my $items='';
756: foreach my $item (@$storearr) {
757: $items.=&escape($item).'&';
758: }
759: $items=~s/\&$//;
760: if (!$udom) {
761: $udom=$env{'user.domain'};
762: if (defined(&domain($udom,'primary'))) {
763: $uhome=&domain($udom,'primary');
764: } else {
765: undef($uhome);
766: }
767: } else {
768: if (!$uhome) {
769: if (defined(&domain($udom,'primary'))) {
770: $uhome=&domain($udom,'primary');
771: }
772: }
773: }
774: if ($udom && $uhome && ($uhome ne 'no_host')) {
775: my $rep=&reply("getdom:$udom:$namespace:$items",$uhome);
776: my %returnhash;
777: if ($rep eq '' || $rep =~ /^error: 2 /) {
778: return %returnhash;
779: }
780: my @pairs=split(/\&/,$rep);
781: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
782: return @pairs;
783: }
784: my $i=0;
785: foreach my $item (@$storearr) {
786: $returnhash{$item}=&thaw_unescape($pairs[$i]);
787: $i++;
788: }
789: return %returnhash;
790: } else {
791: &logthis("get_dom failed - no homeserver and/or domain ($udom) ($uhome)");
792: }
793: }
794:
795: # -------------------------------------------- put items in domain db files
796:
797: sub put_dom {
798: my ($namespace,$storehash,$udom,$uhome)=@_;
799: if (!$udom) {
800: $udom=$env{'user.domain'};
801: if (defined(&domain($udom,'primary'))) {
802: $uhome=&domain($udom,'primary');
803: } else {
804: undef($uhome);
805: }
806: } else {
807: if (!$uhome) {
808: if (defined(&domain($udom,'primary'))) {
809: $uhome=&domain($udom,'primary');
810: }
811: }
812: }
813: if ($udom && $uhome && ($uhome ne 'no_host')) {
814: my $items='';
815: foreach my $item (keys(%$storehash)) {
816: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
817: }
818: $items=~s/\&$//;
819: return &reply("putdom:$udom:$namespace:$items",$uhome);
820: } else {
821: &logthis("put_dom failed - no homeserver and/or domain");
822: }
823: }
824:
825: sub retrieve_inst_usertypes {
826: my ($udom) = @_;
827: my (%returnhash,@order);
828: if (defined(&domain($udom,'primary'))) {
829: my $uhome=&domain($udom,'primary');
830: my $rep=&reply("inst_usertypes:$udom",$uhome);
831: my ($hashitems,$orderitems) = split(/:/,$rep);
832: my @pairs=split(/\&/,$hashitems);
833: foreach my $item (@pairs) {
834: my ($key,$value)=split(/=/,$item,2);
835: $key = &unescape($key);
836: next if ($key =~ /^error: 2 /);
837: $returnhash{$key}=&thaw_unescape($value);
838: }
839: my @esc_order = split(/\&/,$orderitems);
840: foreach my $item (@esc_order) {
841: push(@order,&unescape($item));
842: }
843: } else {
844: &logthis("get_dom failed - no primary domain server for $udom");
845: }
846: return (\%returnhash,\@order);
847: }
848:
849: sub is_domainimage {
850: my ($url) = @_;
851: if ($url=~m-^/+res/+($match_domain)/+\1\-domainconfig/+(img|logo|domlogo)/+-) {
852: if (&domain($1) ne '') {
853: return '1';
854: }
855: }
856: return;
857: }
858:
859: sub inst_directory_query {
860: my ($srch) = @_;
861: my $udom = $srch->{'srchdomain'};
862: my %results;
863: my $homeserver = &domain($udom,'primary');
864: my $outcome;
865: if ($homeserver ne '') {
866: my $queryid=&reply("querysend:instdirsearch:".
867: &escape($srch->{'srchby'}).':'.
868: &escape($srch->{'srchterm'}).':'.
869: &escape($srch->{'srchtype'}),$homeserver);
870: my $host=&hostname($homeserver);
871: if ($queryid !~/^\Q$host\E\_/) {
872: &logthis('instituional directory search invalid queryid: '.$queryid.' for host: '.$homeserver.'in domain '.$udom);
873: return;
874: }
875: my $response = &get_query_reply($queryid);
876: my $maxtries = 5;
877: my $tries = 1;
878: while (($response=~/^timeout/) && ($tries < $maxtries)) {
879: $response = &get_query_reply($queryid);
880: $tries ++;
881: }
882:
883: if (!&error($response) && $response ne 'refused') {
884: if ($response eq 'unavailable') {
885: $outcome = $response;
886: } else {
887: $outcome = 'ok';
888: my @matches = split(/\n/,$response);
889: foreach my $match (@matches) {
890: my ($key,$value) = split(/=/,$match);
891: $results{&unescape($key).':'.$udom} = &thaw_unescape($value);
892: }
893: }
894: }
895: }
896: return ($outcome,%results);
897: }
898:
899: sub usersearch {
900: my ($srch) = @_;
901: my $dom = $srch->{'srchdomain'};
902: my %results;
903: my %libserv = &all_library();
904: my $query = 'usersearch';
905: foreach my $tryserver (keys(%libserv)) {
906: if (&host_domain($tryserver) eq $dom) {
907: my $host=&hostname($tryserver);
908: my $queryid=
909: &reply("querysend:".&escape($query).':'.
910: &escape($srch->{'srchby'}).':'.
911: &escape($srch->{'srchtype'}).':'.
912: &escape($srch->{'srchterm'}),$tryserver);
913: if ($queryid !~/^\Q$host\E\_/) {
914: &logthis('usersearch: invalid queryid: '.$queryid.' for host: '.$host.'in domain '.$dom.' and server: '.$tryserver);
915: next;
916: }
917: my $reply = &get_query_reply($queryid);
918: my $maxtries = 1;
919: my $tries = 1;
920: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
921: $reply = &get_query_reply($queryid);
922: $tries ++;
923: }
924: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
925: &logthis('usersrch error: '.$reply.' for '.$dom.' - searching for : '.$srch->{'srchterm'}.' by '.$srch->{'srchby'}.' ('.$srch->{'srchtype'}.') - maxtries: '.$maxtries.' tries: '.$tries);
926: } else {
927: my @matches;
928: if ($reply =~ /\n/) {
929: @matches = split(/\n/,$reply);
930: } else {
931: @matches = split(/\&/,$reply);
932: }
933: foreach my $match (@matches) {
934: my ($uname,$udom,%userhash);
935: foreach my $entry (split(/:/,$match)) {
936: my ($key,$value) =
937: map {&unescape($_);} split(/=/,$entry);
938: $userhash{$key} = $value;
939: if ($key eq 'username') {
940: $uname = $value;
941: } elsif ($key eq 'domain') {
942: $udom = $value;
943: }
944: }
945: $results{$uname.':'.$udom} = \%userhash;
946: }
947: }
948: }
949: }
950: return %results;
951: }
952:
953: sub get_instuser {
954: my ($udom,$uname,$id) = @_;
955: my $homeserver = &domain($udom,'primary');
956: my ($outcome,%results);
957: if ($homeserver ne '') {
958: my $queryid=&reply("querysend:getinstuser:".&escape($uname).':'.
959: &escape($id).':'.&escape($udom),$homeserver);
960: my $host=&hostname($homeserver);
961: if ($queryid !~/^\Q$host\E\_/) {
962: &logthis('get_instuser invalid queryid: '.$queryid.' for host: '.$homeserver.'in domain '.$udom);
963: return;
964: }
965: my $response = &get_query_reply($queryid);
966: my $maxtries = 5;
967: my $tries = 1;
968: while (($response=~/^timeout/) && ($tries < $maxtries)) {
969: $response = &get_query_reply($queryid);
970: $tries ++;
971: }
972: if (!&error($response) && $response ne 'refused') {
973: if ($response eq 'unavailable') {
974: $outcome = $response;
975: } else {
976: $outcome = 'ok';
977: my @matches = split(/\n/,$response);
978: foreach my $match (@matches) {
979: my ($key,$value) = split(/=/,$match);
980: $results{&unescape($key)} = &thaw_unescape($value);
981: }
982: }
983: }
984: }
985: my %userinfo;
986: if (ref($results{$uname}) eq 'HASH') {
987: %userinfo = %{$results{$uname}};
988: }
989: return ($outcome,%userinfo);
990: }
991:
992: sub inst_rulecheck {
993: my ($udom,$uname,$rules) = @_;
994: my %returnhash;
995: if ($udom ne '') {
996: if (ref($rules) eq 'ARRAY') {
997: @{$rules} = map {&escape($_);} (@{$rules});
998: my $rulestr = join(':',@{$rules});
999: my $homeserver=&domain($udom,'primary');
1000: if (($homeserver ne '') && ($homeserver ne 'no_host')) {
1001: my $response=&unescape(&reply('instrulecheck:'.&escape($udom).':'.
1002: &escape($uname).':'.$rulestr,
1003: $homeserver));
1004: if ($response ne 'refused') {
1005: my @pairs=split(/\&/,$response);
1006: foreach my $item (@pairs) {
1007: my ($key,$value)=split(/=/,$item,2);
1008: $key = &unescape($key);
1009: next if ($key =~ /^error: 2 /);
1010: $returnhash{$key}=&thaw_unescape($value);
1011: }
1012: }
1013: }
1014: }
1015: }
1016: return %returnhash;
1017: }
1018:
1019: sub inst_userrules {
1020: my ($udom) = @_;
1021: my (%ruleshash,@ruleorder);
1022: if ($udom ne '') {
1023: my $homeserver=&domain($udom,'primary');
1024: if (($homeserver ne '') && ($homeserver ne 'no_host')) {
1025: my $response=&reply('instuserrules:'.&escape($udom),
1026: $homeserver);
1027: if (($response ne 'refused') && ($response ne 'error') &&
1028: ($response ne 'no_such_host')) {
1029: my ($hashitems,$orderitems) = split(/:/,$response);
1030: my @pairs=split(/\&/,$hashitems);
1031: foreach my $item (@pairs) {
1032: my ($key,$value)=split(/=/,$item,2);
1033: $key = &unescape($key);
1034: next if ($key =~ /^error: 2 /);
1035: $ruleshash{$key}=&thaw_unescape($value);
1036: }
1037: my @esc_order = split(/\&/,$orderitems);
1038: foreach my $item (@esc_order) {
1039: push(@ruleorder,&unescape($item));
1040: }
1041: }
1042: }
1043: }
1044: return (\%ruleshash,\@ruleorder);
1045: }
1046:
1047: # --------------------------------------------------- Assign a key to a student
1048:
1049: sub assign_access_key {
1050: #
1051: # a valid key looks like uname:udom#comments
1052: # comments are being appended
1053: #
1054: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
1055: $kdom=
1056: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
1057: $knum=
1058: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
1059: $cdom=
1060: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
1061: $cnum=
1062: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
1063: $udom=$env{'user.name'} unless (defined($udom));
1064: $uname=$env{'user.domain'} unless (defined($uname));
1065: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
1066: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
1067: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
1068: # assigned to this person
1069: # - this should not happen,
1070: # unless something went wrong
1071: # the first time around
1072: # ready to assign
1073: $logentry=$1.'; '.$logentry;
1074: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
1075: $kdom,$knum) eq 'ok') {
1076: # key now belongs to user
1077: my $envkey='key.'.$cdom.'_'.$cnum;
1078: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
1079: &appenv('environment.'.$envkey => $ckey);
1080: return 'ok';
1081: } else {
1082: return
1083: 'error: Count not permanently assign key, will need to be re-entered later.';
1084: }
1085: } else {
1086: return 'error: Could not assign key, try again later.';
1087: }
1088: } elsif (!$existing{$ckey}) {
1089: # the key does not exist
1090: return 'error: The key does not exist';
1091: } else {
1092: # the key is somebody else's
1093: return 'error: The key is already in use';
1094: }
1095: }
1096:
1097: # ------------------------------------------ put an additional comment on a key
1098:
1099: sub comment_access_key {
1100: #
1101: # a valid key looks like uname:udom#comments
1102: # comments are being appended
1103: #
1104: my ($ckey,$cdom,$cnum,$logentry)=@_;
1105: $cdom=
1106: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
1107: $cnum=
1108: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
1109: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
1110: if ($existing{$ckey}) {
1111: $existing{$ckey}.='; '.$logentry;
1112: # ready to assign
1113: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
1114: $cdom,$cnum) eq 'ok') {
1115: return 'ok';
1116: } else {
1117: return 'error: Count not store comment.';
1118: }
1119: } else {
1120: # the key does not exist
1121: return 'error: The key does not exist';
1122: }
1123: }
1124:
1125: # ------------------------------------------------------ Generate a set of keys
1126:
1127: sub generate_access_keys {
1128: my ($number,$cdom,$cnum,$logentry)=@_;
1129: $cdom=
1130: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
1131: $cnum=
1132: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
1133: unless (&allowed('mky',$cdom)) { return 0; }
1134: unless (($cdom) && ($cnum)) { return 0; }
1135: if ($number>10000) { return 0; }
1136: sleep(2); # make sure don't get same seed twice
1137: srand(time()^($$+($$<<15))); # from "Programming Perl"
1138: my $total=0;
1139: for (my $i=1;$i<=$number;$i++) {
1140: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
1141: sprintf("%lx",int(100000*rand)).'-'.
1142: sprintf("%lx",int(100000*rand));
1143: $newkey=~s/1/g/g; # folks mix up 1 and l
1144: $newkey=~s/0/h/g; # and also 0 and O
1145: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
1146: if ($existing{$newkey}) {
1147: $i--;
1148: } else {
1149: if (&put('accesskeys',
1150: { $newkey => '# generated '.localtime().
1151: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
1152: '; '.$logentry },
1153: $cdom,$cnum) eq 'ok') {
1154: $total++;
1155: }
1156: }
1157: }
1158: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
1159: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
1160: return $total;
1161: }
1162:
1163: # ------------------------------------------------------- Validate an accesskey
1164:
1165: sub validate_access_key {
1166: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
1167: $cdom=
1168: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
1169: $cnum=
1170: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
1171: $udom=$env{'user.domain'} unless (defined($udom));
1172: $uname=$env{'user.name'} unless (defined($uname));
1173: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
1174: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
1175: }
1176:
1177: # ------------------------------------- Find the section of student in a course
1178: sub devalidate_getsection_cache {
1179: my ($udom,$unam,$courseid)=@_;
1180: my $hashid="$udom:$unam:$courseid";
1181: &devalidate_cache_new('getsection',$hashid);
1182: }
1183:
1184: sub courseid_to_courseurl {
1185: my ($courseid) = @_;
1186: #already url style courseid
1187: return $courseid if ($courseid =~ m{^/});
1188:
1189: if (exists($env{'course.'.$courseid.'.num'})) {
1190: my $cnum = $env{'course.'.$courseid.'.num'};
1191: my $cdom = $env{'course.'.$courseid.'.domain'};
1192: return "/$cdom/$cnum";
1193: }
1194:
1195: my %courseinfo=&Apache::lonnet::coursedescription($courseid);
1196: if (exists($courseinfo{'num'})) {
1197: return "/$courseinfo{'domain'}/$courseinfo{'num'}";
1198: }
1199:
1200: return undef;
1201: }
1202:
1203: sub getsection {
1204: my ($udom,$unam,$courseid)=@_;
1205: my $cachetime=1800;
1206:
1207: my $hashid="$udom:$unam:$courseid";
1208: my ($result,$cached)=&is_cached_new('getsection',$hashid);
1209: if (defined($cached)) { return $result; }
1210:
1211: my %Pending;
1212: my %Expired;
1213: #
1214: # Each role can either have not started yet (pending), be active,
1215: # or have expired.
1216: #
1217: # If there is an active role, we are done.
1218: #
1219: # If there is more than one role which has not started yet,
1220: # choose the one which will start sooner
1221: # If there is one role which has not started yet, return it.
1222: #
1223: # If there is more than one expired role, choose the one which ended last.
1224: # If there is a role which has expired, return it.
1225: #
1226: $courseid = &courseid_to_courseurl($courseid);
1227: my %roleshash = &dump('roles',$udom,$unam,$courseid);
1228: foreach my $key (keys(%roleshash)) {
1229: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
1230: my $section=$1;
1231: if ($key eq $courseid.'_st') { $section=''; }
1232: my ($dummy,$end,$start)=split(/\_/,&unescape($roleshash{$key}));
1233: my $now=time;
1234: if (defined($end) && $end && ($now > $end)) {
1235: $Expired{$end}=$section;
1236: next;
1237: }
1238: if (defined($start) && $start && ($now < $start)) {
1239: $Pending{$start}=$section;
1240: next;
1241: }
1242: return &do_cache_new('getsection',$hashid,$section,$cachetime);
1243: }
1244: #
1245: # Presumedly there will be few matching roles from the above
1246: # loop and the sorting time will be negligible.
1247: if (scalar(keys(%Pending))) {
1248: my ($time) = sort {$a <=> $b} keys(%Pending);
1249: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
1250: }
1251: if (scalar(keys(%Expired))) {
1252: my @sorted = sort {$a <=> $b} keys(%Expired);
1253: my $time = pop(@sorted);
1254: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
1255: }
1256: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
1257: }
1258:
1259: sub save_cache {
1260: &purge_remembered();
1261: #&Apache::loncommon::validate_page();
1262: undef(%env);
1263: undef($env_loaded);
1264: }
1265:
1266: my $to_remember=-1;
1267: my %remembered;
1268: my %accessed;
1269: my $kicks=0;
1270: my $hits=0;
1271: sub make_key {
1272: my ($name,$id) = @_;
1273: if (length($id) > 65
1274: && length(&escape($id)) > 200) {
1275: $id=length($id).':'.&Digest::MD5::md5_hex($id);
1276: }
1277: return &escape($name.':'.$id);
1278: }
1279:
1280: sub devalidate_cache_new {
1281: my ($name,$id,$debug) = @_;
1282: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
1283: $id=&make_key($name,$id);
1284: $memcache->delete($id);
1285: delete($remembered{$id});
1286: delete($accessed{$id});
1287: }
1288:
1289: sub is_cached_new {
1290: my ($name,$id,$debug) = @_;
1291: $id=&make_key($name,$id);
1292: if (exists($remembered{$id})) {
1293: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
1294: $accessed{$id}=[&gettimeofday()];
1295: $hits++;
1296: return ($remembered{$id},1);
1297: }
1298: my $value = $memcache->get($id);
1299: if (!(defined($value))) {
1300: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
1301: return (undef,undef);
1302: }
1303: if ($value eq '__undef__') {
1304: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
1305: $value=undef;
1306: }
1307: &make_room($id,$value,$debug);
1308: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
1309: return ($value,1);
1310: }
1311:
1312: sub do_cache_new {
1313: my ($name,$id,$value,$time,$debug) = @_;
1314: $id=&make_key($name,$id);
1315: my $setvalue=$value;
1316: if (!defined($setvalue)) {
1317: $setvalue='__undef__';
1318: }
1319: if (!defined($time) ) {
1320: $time=600;
1321: }
1322: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
1323: my $result = $memcache->set($id,$setvalue,$time);
1324: if (! $result) {
1325: &logthis("caching of id -> $id failed");
1326: $memcache->disconnect_all();
1327: }
1328: # need to make a copy of $value
1329: #&make_room($id,$value,$debug);
1330: return $value;
1331: }
1332:
1333: sub make_room {
1334: my ($id,$value,$debug)=@_;
1335: $remembered{$id}=$value;
1336: if ($to_remember<0) { return; }
1337: $accessed{$id}=[&gettimeofday()];
1338: if (scalar(keys(%remembered)) <= $to_remember) { return; }
1339: my $to_kick;
1340: my $max_time=0;
1341: foreach my $other (keys(%accessed)) {
1342: if (&tv_interval($accessed{$other}) > $max_time) {
1343: $to_kick=$other;
1344: $max_time=&tv_interval($accessed{$other});
1345: }
1346: }
1347: delete($remembered{$to_kick});
1348: delete($accessed{$to_kick});
1349: $kicks++;
1350: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
1351: return;
1352: }
1353:
1354: sub purge_remembered {
1355: #&logthis("Tossing ".scalar(keys(%remembered)));
1356: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
1357: undef(%remembered);
1358: undef(%accessed);
1359: }
1360: # ------------------------------------- Read an entry from a user's environment
1361:
1362: sub userenvironment {
1363: my ($udom,$unam,@what)=@_;
1364: my %returnhash=();
1365: my @answer=split(/\&/,
1366: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1367: &homeserver($unam,$udom)));
1368: my $i;
1369: for ($i=0;$i<=$#what;$i++) {
1370: $returnhash{$what[$i]}=&unescape($answer[$i]);
1371: }
1372: return %returnhash;
1373: }
1374:
1375: # ---------------------------------------------------------- Get a studentphoto
1376: sub studentphoto {
1377: my ($udom,$unam,$ext) = @_;
1378: my $home=&Apache::lonnet::homeserver($unam,$udom);
1379: if (defined($env{'request.course.id'})) {
1380: if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
1381: if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
1382: return(&retrievestudentphoto($udom,$unam,$ext));
1383: } else {
1384: my ($result,$perm_reqd)=
1385: &Apache::lonnet::auto_photo_permission($unam,$udom);
1386: if ($result eq 'ok') {
1387: if (!($perm_reqd eq 'yes')) {
1388: return(&retrievestudentphoto($udom,$unam,$ext));
1389: }
1390: }
1391: }
1392: }
1393: } else {
1394: my ($result,$perm_reqd) =
1395: &Apache::lonnet::auto_photo_permission($unam,$udom);
1396: if ($result eq 'ok') {
1397: if (!($perm_reqd eq 'yes')) {
1398: return(&retrievestudentphoto($udom,$unam,$ext));
1399: }
1400: }
1401: }
1402: return '/adm/lonKaputt/lonlogo_broken.gif';
1403: }
1404:
1405: sub retrievestudentphoto {
1406: my ($udom,$unam,$ext,$type) = @_;
1407: my $home=&Apache::lonnet::homeserver($unam,$udom);
1408: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
1409: if ($ret eq 'ok') {
1410: my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
1411: if ($type eq 'thumbnail') {
1412: $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
1413: }
1414: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
1415: return $tokenurl;
1416: } else {
1417: if ($type eq 'thumbnail') {
1418: return '/adm/lonKaputt/genericstudent_tn.gif';
1419: } else {
1420: return '/adm/lonKaputt/lonlogo_broken.gif';
1421: }
1422: }
1423: }
1424:
1425: # -------------------------------------------------------------------- New chat
1426:
1427: sub chatsend {
1428: my ($newentry,$anon,$group)=@_;
1429: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1430: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1431: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1432: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1433: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
1434: &escape($newentry)).':'.$group,$chome);
1435: }
1436:
1437: # ------------------------------------------ Find current version of a resource
1438:
1439: sub getversion {
1440: my $fname=&clutter(shift);
1441: unless ($fname=~/^\/res\//) { return -1; }
1442: return ¤tversion(&filelocation('',$fname));
1443: }
1444:
1445: sub currentversion {
1446: my $fname=shift;
1447: my ($result,$cached)=&is_cached_new('resversion',$fname);
1448: if (defined($cached)) { return $result; }
1449: my $author=$fname;
1450: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1451: my ($udom,$uname)=split(/\//,$author);
1452: my $home=homeserver($uname,$udom);
1453: if ($home eq 'no_host') {
1454: return -1;
1455: }
1456: my $answer=reply("currentversion:$fname",$home);
1457: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1458: return -1;
1459: }
1460: return &do_cache_new('resversion',$fname,$answer,600);
1461: }
1462:
1463: # ----------------------------- Subscribe to a resource, return URL if possible
1464:
1465: sub subscribe {
1466: my $fname=shift;
1467: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1468: $fname=~s/[\n\r]//g;
1469: my $author=$fname;
1470: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1471: my ($udom,$uname)=split(/\//,$author);
1472: my $home=homeserver($uname,$udom);
1473: if ($home eq 'no_host') {
1474: return 'not_found';
1475: }
1476: my $answer=reply("sub:$fname",$home);
1477: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1478: $answer.=' by '.$home;
1479: }
1480: return $answer;
1481: }
1482:
1483: # -------------------------------------------------------------- Replicate file
1484:
1485: sub repcopy {
1486: my $filename=shift;
1487: $filename=~s/\/+/\//g;
1488: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1489: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1490: if ($filename=~m|^/home/httpd/html/userfiles/| or
1491: $filename=~m -^/*(uploaded|editupload)/-) {
1492: return &repcopy_userfile($filename);
1493: }
1494: $filename=~s/[\n\r]//g;
1495: my $transname="$filename.in.transfer";
1496: # FIXME: this should flock
1497: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1498: my $remoteurl=subscribe($filename);
1499: if ($remoteurl =~ /^con_lost by/) {
1500: &logthis("Subscribe returned $remoteurl: $filename");
1501: return 'unavailable';
1502: } elsif ($remoteurl eq 'not_found') {
1503: #&logthis("Subscribe returned not_found: $filename");
1504: return 'not_found';
1505: } elsif ($remoteurl =~ /^rejected by/) {
1506: &logthis("Subscribe returned $remoteurl: $filename");
1507: return 'forbidden';
1508: } elsif ($remoteurl eq 'directory') {
1509: return 'ok';
1510: } else {
1511: my $author=$filename;
1512: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1513: my ($udom,$uname)=split(/\//,$author);
1514: my $home=homeserver($uname,$udom);
1515: unless ($home eq $perlvar{'lonHostID'}) {
1516: my @parts=split(/\//,$filename);
1517: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1518: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1519: &logthis("Malconfiguration for replication: $filename");
1520: return 'bad_request';
1521: }
1522: my $count;
1523: for ($count=5;$count<$#parts;$count++) {
1524: $path.="/$parts[$count]";
1525: if ((-e $path)!=1) {
1526: mkdir($path,0777);
1527: }
1528: }
1529: my $ua=new LWP::UserAgent;
1530: my $request=new HTTP::Request('GET',"$remoteurl");
1531: my $response=$ua->request($request,$transname);
1532: if ($response->is_error()) {
1533: unlink($transname);
1534: my $message=$response->status_line;
1535: &logthis("<font color=\"blue\">WARNING:"
1536: ." LWP get: $message: $filename</font>");
1537: return 'unavailable';
1538: } else {
1539: if ($remoteurl!~/\.meta$/) {
1540: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1541: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1542: if ($mresponse->is_error()) {
1543: unlink($filename.'.meta');
1544: &logthis(
1545: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1546: }
1547: }
1548: rename($transname,$filename);
1549: return 'ok';
1550: }
1551: }
1552: }
1553: }
1554:
1555: # ------------------------------------------------ Get server side include body
1556: sub ssi_body {
1557: my ($filelink,%form)=@_;
1558: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1559: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1560: }
1561: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1562: &ssi($filelink,%form));
1563: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
1564: $output=~s/^.*?\<body[^\>]*\>//si;
1565: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1566: return $output;
1567: }
1568:
1569: # --------------------------------------------------------- Server Side Include
1570:
1571: sub absolute_url {
1572: my ($host_name) = @_;
1573: my $protocol = ($ENV{'SERVER_PORT'} == 443?'https://':'http://');
1574: if ($host_name eq '') {
1575: $host_name = $ENV{'SERVER_NAME'};
1576: }
1577: return $protocol.$host_name;
1578: }
1579:
1580: sub ssi {
1581:
1582: my ($fn,%form)=@_;
1583:
1584: my $ua=new LWP::UserAgent;
1585:
1586: my $request;
1587:
1588: $form{'no_update_last_known'}=1;
1589: &Apache::lonenc::check_encrypt(\$fn);
1590: if (%form) {
1591: $request=new HTTP::Request('POST',&absolute_url().$fn);
1592: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1593: } else {
1594: $request=new HTTP::Request('GET',&absolute_url().$fn);
1595: }
1596:
1597: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1598: my $response=$ua->request($request);
1599:
1600: return $response->content;
1601: }
1602:
1603: sub externalssi {
1604: my ($url)=@_;
1605: my $ua=new LWP::UserAgent;
1606: my $request=new HTTP::Request('GET',$url);
1607: my $response=$ua->request($request);
1608: return $response->content;
1609: }
1610:
1611: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1612:
1613: sub allowuploaded {
1614: my ($srcurl,$url)=@_;
1615: $url=&clutter(&declutter($url));
1616: my $dir=$url;
1617: $dir=~s/\/[^\/]+$//;
1618: my %httpref=();
1619: my $httpurl=&hreflocation('',$url);
1620: $httpref{'httpref.'.$httpurl}=$srcurl;
1621: &Apache::lonnet::appenv(%httpref);
1622: }
1623:
1624: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1625: # input: action, courseID, current domain, intended
1626: # path to file, source of file, instruction to parse file for objects,
1627: # ref to hash for embedded objects,
1628: # ref to hash for codebase of java objects.
1629: #
1630: # output: url to file (if action was uploaddoc),
1631: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1632: #
1633: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1634: # course.
1635: #
1636: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1637: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1638: # course's home server.
1639: #
1640: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1641: # be copied from $source (current location) to
1642: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1643: # and will then be copied to
1644: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1645: # course's home server.
1646: #
1647: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1648: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1649: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1650: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1651: # in course's home server.
1652: #
1653:
1654: sub process_coursefile {
1655: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1656: my $fetchresult;
1657: my $home=&homeserver($docuname,$docudom);
1658: if ($action eq 'propagate') {
1659: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1660: $home);
1661: } else {
1662: my $fpath = '';
1663: my $fname = $file;
1664: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1665: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1666: my $filepath = &build_filepath($fpath);
1667: if ($action eq 'copy') {
1668: if ($source eq '') {
1669: $fetchresult = 'no source file';
1670: return $fetchresult;
1671: } else {
1672: my $destination = $filepath.'/'.$fname;
1673: rename($source,$destination);
1674: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1675: $home);
1676: }
1677: } elsif ($action eq 'uploaddoc') {
1678: open(my $fh,'>'.$filepath.'/'.$fname);
1679: print $fh $env{'form.'.$source};
1680: close($fh);
1681: if ($parser eq 'parse') {
1682: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1683: unless ($parse_result eq 'ok') {
1684: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1685: }
1686: }
1687: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1688: $home);
1689: if ($fetchresult eq 'ok') {
1690: return '/uploaded/'.$fpath.'/'.$fname;
1691: } else {
1692: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1693: ' to host '.$home.': '.$fetchresult);
1694: return '/adm/notfound.html';
1695: }
1696: }
1697: }
1698: unless ( $fetchresult eq 'ok') {
1699: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1700: ' to host '.$home.': '.$fetchresult);
1701: }
1702: return $fetchresult;
1703: }
1704:
1705: sub build_filepath {
1706: my ($fpath) = @_;
1707: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1708: unless ($fpath eq '') {
1709: my @parts=split('/',$fpath);
1710: foreach my $part (@parts) {
1711: $filepath.= '/'.$part;
1712: if ((-e $filepath)!=1) {
1713: mkdir($filepath,0777);
1714: }
1715: }
1716: }
1717: return $filepath;
1718: }
1719:
1720: sub store_edited_file {
1721: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1722: my $file = $primary_url;
1723: $file =~ s#^/uploaded/$docudom/$docuname/##;
1724: my $fpath = '';
1725: my $fname = $file;
1726: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1727: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1728: my $filepath = &build_filepath($fpath);
1729: open(my $fh,'>'.$filepath.'/'.$fname);
1730: print $fh $content;
1731: close($fh);
1732: my $home=&homeserver($docuname,$docudom);
1733: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1734: $home);
1735: if ($$fetchresult eq 'ok') {
1736: return '/uploaded/'.$fpath.'/'.$fname;
1737: } else {
1738: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1739: ' to host '.$home.': '.$$fetchresult);
1740: return '/adm/notfound.html';
1741: }
1742: }
1743:
1744: sub clean_filename {
1745: my ($fname,$args)=@_;
1746: # Replace Windows backslashes by forward slashes
1747: $fname=~s/\\/\//g;
1748: if (!$args->{'keep_path'}) {
1749: # Get rid of everything but the actual filename
1750: $fname=~s/^.*\/([^\/]+)$/$1/;
1751: }
1752: # Replace spaces by underscores
1753: $fname=~s/\s+/\_/g;
1754: # Replace all other weird characters by nothing
1755: $fname=~s{[^/\w\.\-]}{}g;
1756: # Replace all .\d. sequences with _\d. so they no longer look like version
1757: # numbers
1758: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1759: return $fname;
1760: }
1761:
1762: # --------------- Take an uploaded file and put it into the userfiles directory
1763: # input: $formname - the contents of the file are in $env{"form.$formname"}
1764: # the desired filenam is in $env{"form.$formname.filename"}
1765: # $coursedoc - if true up to the current course
1766: # if false
1767: # $subdir - directory in userfile to store the file into
1768: # $parser - instruction to parse file for objects ($parser = parse)
1769: # $allfiles - reference to hash for embedded objects
1770: # $codebase - reference to hash for codebase of java objects
1771: # $desuname - username for permanent storage of uploaded file
1772: # $dsetudom - domain for permanaent storage of uploaded file
1773: # $thumbwidth - width (pixels) of thumbnail to make for uploaded image
1774: # $thumbheight - height (pixels) of thumbnail to make for uploaded image
1775: #
1776: # output: url of file in userspace, or error: <message>
1777: # or /adm/notfound.html if failure to upload occurse
1778:
1779:
1780: sub userfileupload {
1781: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,
1782: $destudom,$thumbwidth,$thumbheight)=@_;
1783: if (!defined($subdir)) { $subdir='unknown'; }
1784: my $fname=$env{'form.'.$formname.'.filename'};
1785: $fname=&clean_filename($fname);
1786: # See if there is anything left
1787: unless ($fname) { return 'error: no uploaded file'; }
1788: chop($env{'form.'.$formname});
1789: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1790: my $now = time;
1791: my $filepath = 'tmp/helprequests/'.$now;
1792: my @parts=split(/\//,$filepath);
1793: my $fullpath = $perlvar{'lonDaemons'};
1794: for (my $i=0;$i<@parts;$i++) {
1795: $fullpath .= '/'.$parts[$i];
1796: if ((-e $fullpath)!=1) {
1797: mkdir($fullpath,0777);
1798: }
1799: }
1800: open(my $fh,'>'.$fullpath.'/'.$fname);
1801: print $fh $env{'form.'.$formname};
1802: close($fh);
1803: return $fullpath.'/'.$fname;
1804: } elsif (($formname eq 'coursecreatorxml') && ($subdir eq 'batchupload')) { #files uploaded to create course page are handled differently
1805: my $filepath = 'tmp/addcourse/'.$destudom.'/web/'.$env{'user.name'}.
1806: '_'.$env{'user.domain'}.'/pending';
1807: my @parts=split(/\//,$filepath);
1808: my $fullpath = $perlvar{'lonDaemons'};
1809: for (my $i=0;$i<@parts;$i++) {
1810: $fullpath .= '/'.$parts[$i];
1811: if ((-e $fullpath)!=1) {
1812: mkdir($fullpath,0777);
1813: }
1814: }
1815: open(my $fh,'>'.$fullpath.'/'.$fname);
1816: print $fh $env{'form.'.$formname};
1817: close($fh);
1818: return $fullpath.'/'.$fname;
1819: }
1820:
1821: # Create the directory if not present
1822: $fname="$subdir/$fname";
1823: if ($coursedoc) {
1824: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1825: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1826: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1827: return &finishuserfileupload($docuname,$docudom,
1828: $formname,$fname,$parser,$allfiles,
1829: $codebase,$thumbwidth,$thumbheight);
1830: } else {
1831: $fname=$env{'form.folder'}.'/'.$fname;
1832: return &process_coursefile('uploaddoc',$docuname,$docudom,
1833: $fname,$formname,$parser,
1834: $allfiles,$codebase);
1835: }
1836: } elsif (defined($destuname)) {
1837: my $docuname=$destuname;
1838: my $docudom=$destudom;
1839: return &finishuserfileupload($docuname,$docudom,$formname,$fname,
1840: $parser,$allfiles,$codebase,
1841: $thumbwidth,$thumbheight);
1842:
1843: } else {
1844: my $docuname=$env{'user.name'};
1845: my $docudom=$env{'user.domain'};
1846: if (exists($env{'form.group'})) {
1847: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1848: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1849: }
1850: return &finishuserfileupload($docuname,$docudom,$formname,$fname,
1851: $parser,$allfiles,$codebase,
1852: $thumbwidth,$thumbheight);
1853: }
1854: }
1855:
1856: sub finishuserfileupload {
1857: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase,
1858: $thumbwidth,$thumbheight) = @_;
1859: my $path=$docudom.'/'.$docuname.'/';
1860: my $filepath=$perlvar{'lonDocRoot'};
1861: my ($fnamepath,$file,$fetchthumb);
1862: $file=$fname;
1863: if ($fname=~m|/|) {
1864: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1865: $path.=$fnamepath.'/';
1866: }
1867: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1868: my $count;
1869: for ($count=4;$count<=$#parts;$count++) {
1870: $filepath.="/$parts[$count]";
1871: if ((-e $filepath)!=1) {
1872: mkdir($filepath,0777);
1873: }
1874: }
1875: # Save the file
1876: {
1877: if (!open(FH,'>'.$filepath.'/'.$file)) {
1878: &logthis('Failed to create '.$filepath.'/'.$file);
1879: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1880: return '/adm/notfound.html';
1881: }
1882: if (!print FH ($env{'form.'.$formname})) {
1883: &logthis('Failed to write to '.$filepath.'/'.$file);
1884: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1885: return '/adm/notfound.html';
1886: }
1887: close(FH);
1888: }
1889: if ($parser eq 'parse') {
1890: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1891: $codebase);
1892: unless ($parse_result eq 'ok') {
1893: &logthis('Failed to parse '.$filepath.$file.
1894: ' for embedded media: '.$parse_result);
1895: }
1896: }
1897: if (($thumbwidth =~ /^\d+$/) && ($thumbheight =~ /^\d+$/)) {
1898: my $input = $filepath.'/'.$file;
1899: my $output = $filepath.'/'.'tn-'.$file;
1900: my $thumbsize = $thumbwidth.'x'.$thumbheight;
1901: system("convert -sample $thumbsize $input $output");
1902: if (-e $filepath.'/'.'tn-'.$file) {
1903: $fetchthumb = 1;
1904: }
1905: }
1906:
1907: # Notify homeserver to grep it
1908: #
1909: my $docuhome=&homeserver($docuname,$docudom);
1910: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1911: if ($fetchresult eq 'ok') {
1912: if ($fetchthumb) {
1913: my $thumbresult= &reply('fetchuserfile:'.$path.'tn-'.$file,$docuhome);
1914: if ($thumbresult ne 'ok') {
1915: &logthis('Failed to transfer '.$path.'tn-'.$file.' to host '.
1916: $docuhome.': '.$thumbresult);
1917: }
1918: }
1919: #
1920: # Return the URL to it
1921: return '/uploaded/'.$path.$file;
1922: } else {
1923: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1924: ': '.$fetchresult);
1925: return '/adm/notfound.html';
1926: }
1927: }
1928:
1929: sub extract_embedded_items {
1930: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1931: my @state = ();
1932: my %javafiles = (
1933: codebase => '',
1934: code => '',
1935: archive => ''
1936: );
1937: my %mediafiles = (
1938: src => '',
1939: movie => '',
1940: );
1941: my $p;
1942: if ($content) {
1943: $p = HTML::LCParser->new($content);
1944: } else {
1945: $p = HTML::LCParser->new($filepath.'/'.$file);
1946: }
1947: while (my $t=$p->get_token()) {
1948: if ($t->[0] eq 'S') {
1949: my ($tagname, $attr) = ($t->[1],$t->[2]);
1950: push(@state, $tagname);
1951: if (lc($tagname) eq 'allow') {
1952: &add_filetype($allfiles,$attr->{'src'},'src');
1953: }
1954: if (lc($tagname) eq 'img') {
1955: &add_filetype($allfiles,$attr->{'src'},'src');
1956: }
1957: if (lc($tagname) eq 'a') {
1958: &add_filetype($allfiles,$attr->{'href'},'href');
1959: }
1960: if (lc($tagname) eq 'script') {
1961: if ($attr->{'archive'} =~ /\.jar$/i) {
1962: &add_filetype($allfiles,$attr->{'archive'},'archive');
1963: } else {
1964: &add_filetype($allfiles,$attr->{'src'},'src');
1965: }
1966: }
1967: if (lc($tagname) eq 'link') {
1968: if (lc($attr->{'rel'}) eq 'stylesheet') {
1969: &add_filetype($allfiles,$attr->{'href'},'href');
1970: }
1971: }
1972: if (lc($tagname) eq 'object' ||
1973: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1974: foreach my $item (keys(%javafiles)) {
1975: $javafiles{$item} = '';
1976: }
1977: }
1978: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1979: my $name = lc($attr->{'name'});
1980: foreach my $item (keys(%javafiles)) {
1981: if ($name eq $item) {
1982: $javafiles{$item} = $attr->{'value'};
1983: last;
1984: }
1985: }
1986: foreach my $item (keys(%mediafiles)) {
1987: if ($name eq $item) {
1988: &add_filetype($allfiles, $attr->{'value'}, 'value');
1989: last;
1990: }
1991: }
1992: }
1993: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1994: foreach my $item (keys(%javafiles)) {
1995: if ($attr->{$item}) {
1996: $javafiles{$item} = $attr->{$item};
1997: last;
1998: }
1999: }
2000: foreach my $item (keys(%mediafiles)) {
2001: if ($attr->{$item}) {
2002: &add_filetype($allfiles,$attr->{$item},$item);
2003: last;
2004: }
2005: }
2006: }
2007: } elsif ($t->[0] eq 'E') {
2008: my ($tagname) = ($t->[1]);
2009: if ($javafiles{'codebase'} ne '') {
2010: $javafiles{'codebase'} .= '/';
2011: }
2012: if (lc($tagname) eq 'applet' ||
2013: lc($tagname) eq 'object' ||
2014: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
2015: ) {
2016: foreach my $item (keys(%javafiles)) {
2017: if ($item ne 'codebase' && $javafiles{$item} ne '') {
2018: my $file=$javafiles{'codebase'}.$javafiles{$item};
2019: &add_filetype($allfiles,$file,$item);
2020: }
2021: }
2022: }
2023: pop @state;
2024: }
2025: }
2026: return 'ok';
2027: }
2028:
2029: sub add_filetype {
2030: my ($allfiles,$file,$type)=@_;
2031: if (exists($allfiles->{$file})) {
2032: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
2033: push(@{$allfiles->{$file}}, &escape($type));
2034: }
2035: } else {
2036: @{$allfiles->{$file}} = (&escape($type));
2037: }
2038: }
2039:
2040: sub removeuploadedurl {
2041: my ($url)=@_;
2042: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
2043: return &removeuserfile($uname,$udom,$fname);
2044: }
2045:
2046: sub removeuserfile {
2047: my ($docuname,$docudom,$fname)=@_;
2048: my $home=&homeserver($docuname,$docudom);
2049: my $result = &reply("removeuserfile:$docudom/$docuname/$fname",$home);
2050: if ($result eq 'ok') {
2051: if (($fname !~ /\.meta$/) && (&is_portfolio_file($fname))) {
2052: my $metafile = $fname.'.meta';
2053: my $metaresult = &removeuserfile($docuname,$docudom,$metafile);
2054: my $url = "/uploaded/$docudom/$docuname/$fname";
2055: my ($file,$group) = (&parse_portfolio_url($url))[3,4];
2056: my $sqlresult =
2057: &update_portfolio_table($docuname,$docudom,$file,
2058: 'portfolio_metadata',$group,
2059: 'delete');
2060: }
2061: }
2062: return $result;
2063: }
2064:
2065: sub mkdiruserfile {
2066: my ($docuname,$docudom,$dir)=@_;
2067: my $home=&homeserver($docuname,$docudom);
2068: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
2069: }
2070:
2071: sub renameuserfile {
2072: my ($docuname,$docudom,$old,$new)=@_;
2073: my $home=&homeserver($docuname,$docudom);
2074: my $result = &reply("renameuserfile:$docudom:$docuname:".
2075: &escape("$old").':'.&escape("$new"),$home);
2076: if ($result eq 'ok') {
2077: if (($old !~ /\.meta$/) && (&is_portfolio_file($old))) {
2078: my $oldmeta = $old.'.meta';
2079: my $newmeta = $new.'.meta';
2080: my $metaresult =
2081: &renameuserfile($docuname,$docudom,$oldmeta,$newmeta);
2082: my $url = "/uploaded/$docudom/$docuname/$old";
2083: my ($file,$group) = (&parse_portfolio_url($url))[3,4];
2084: my $sqlresult =
2085: &update_portfolio_table($docuname,$docudom,$file,
2086: 'portfolio_metadata',$group,
2087: 'delete');
2088: }
2089: }
2090: return $result;
2091: }
2092:
2093: # ------------------------------------------------------------------------- Log
2094:
2095: sub log {
2096: my ($dom,$nam,$hom,$what)=@_;
2097: return critical("log:$dom:$nam:$what",$hom);
2098: }
2099:
2100: # ------------------------------------------------------------------ Course Log
2101: #
2102: # This routine flushes several buffers of non-mission-critical nature
2103: #
2104:
2105: sub flushcourselogs {
2106: &logthis('Flushing log buffers');
2107: #
2108: # course logs
2109: # This is a log of all transactions in a course, which can be used
2110: # for data mining purposes
2111: #
2112: # It also collects the courseid database, which lists last transaction
2113: # times and course titles for all courseids
2114: #
2115: my %courseidbuffer=();
2116: foreach my $crsid (keys %courselogs) {
2117: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
2118: &escape($courselogs{$crsid}),
2119: $coursehombuf{$crsid}) eq 'ok') {
2120: delete $courselogs{$crsid};
2121: } else {
2122: &logthis('Failed to flush log buffer for '.$crsid);
2123: if (length($courselogs{$crsid})>40000) {
2124: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
2125: " exceeded maximum size, deleting.</font>");
2126: delete $courselogs{$crsid};
2127: }
2128: }
2129: if ($courseidbuffer{$coursehombuf{$crsid}}) {
2130: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
2131: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
2132: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
2133: } else {
2134: $courseidbuffer{$coursehombuf{$crsid}}=
2135: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
2136: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
2137: }
2138: }
2139: #
2140: # Write course id database (reverse lookup) to homeserver of courses
2141: # Is used in pickcourse
2142: #
2143: foreach my $crs_home (keys(%courseidbuffer)) {
2144: &courseidput(&host_domain($crs_home),$courseidbuffer{$crs_home},
2145: $crs_home);
2146: }
2147: #
2148: # File accesses
2149: # Writes to the dynamic metadata of resources to get hit counts, etc.
2150: #
2151: foreach my $entry (keys(%accesshash)) {
2152: if ($entry =~ /___count$/) {
2153: my ($dom,$name);
2154: ($dom,$name,undef)=
2155: ($entry=~m{___($match_domain)/($match_name)/(.*)___count$});
2156: if (! defined($dom) || $dom eq '' ||
2157: ! defined($name) || $name eq '') {
2158: my $cid = $env{'request.course.id'};
2159: $dom = $env{'request.'.$cid.'.domain'};
2160: $name = $env{'request.'.$cid.'.num'};
2161: }
2162: my $value = $accesshash{$entry};
2163: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
2164: my %temphash=($url => $value);
2165: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
2166: if ($result eq 'ok') {
2167: delete $accesshash{$entry};
2168: } elsif ($result eq 'unknown_cmd') {
2169: # Target server has old code running on it.
2170: my %temphash=($entry => $value);
2171: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
2172: delete $accesshash{$entry};
2173: }
2174: }
2175: } else {
2176: my ($dom,$name) = ($entry=~m{___($match_domain)/($match_name)/(.*)___(\w+)$});
2177: my %temphash=($entry => $accesshash{$entry});
2178: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
2179: delete $accesshash{$entry};
2180: }
2181: }
2182: }
2183: #
2184: # Roles
2185: # Reverse lookup of user roles for course faculty/staff and co-authorship
2186: #
2187: foreach my $entry (keys(%userrolehash)) {
2188: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
2189: split(/\:/,$entry);
2190: if (&Apache::lonnet::put('nohist_userroles',
2191: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
2192: $rudom,$runame) eq 'ok') {
2193: delete $userrolehash{$entry};
2194: }
2195: }
2196: #
2197: # Reverse lookup of domain roles (dc, ad, li, sc, au)
2198: #
2199: my %domrolebuffer = ();
2200: foreach my $entry (keys %domainrolehash) {
2201: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split(/:/,$entry);
2202: if ($domrolebuffer{$rudom}) {
2203: $domrolebuffer{$rudom}.='&'.&escape($entry).
2204: '='.&escape($domainrolehash{$entry});
2205: } else {
2206: $domrolebuffer{$rudom}.=&escape($entry).
2207: '='.&escape($domainrolehash{$entry});
2208: }
2209: delete $domainrolehash{$entry};
2210: }
2211: foreach my $dom (keys(%domrolebuffer)) {
2212: my %servers = &get_servers($dom,'library');
2213: foreach my $tryserver (keys(%servers)) {
2214: unless (&reply('domroleput:'.$dom.':'.
2215: $domrolebuffer{$dom},$tryserver) eq 'ok') {
2216: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
2217: }
2218: }
2219: }
2220: $dumpcount++;
2221: }
2222:
2223: sub courselog {
2224: my $what=shift;
2225: $what=time.':'.$what;
2226: unless ($env{'request.course.id'}) { return ''; }
2227: $coursedombuf{$env{'request.course.id'}}=
2228: $env{'course.'.$env{'request.course.id'}.'.domain'};
2229: $coursenumbuf{$env{'request.course.id'}}=
2230: $env{'course.'.$env{'request.course.id'}.'.num'};
2231: $coursehombuf{$env{'request.course.id'}}=
2232: $env{'course.'.$env{'request.course.id'}.'.home'};
2233: $coursedescrbuf{$env{'request.course.id'}}=
2234: $env{'course.'.$env{'request.course.id'}.'.description'};
2235: $courseinstcodebuf{$env{'request.course.id'}}=
2236: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
2237: $courseownerbuf{$env{'request.course.id'}}=
2238: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
2239: $coursetypebuf{$env{'request.course.id'}}=
2240: $env{'course.'.$env{'request.course.id'}.'.type'};
2241: if (defined $courselogs{$env{'request.course.id'}}) {
2242: $courselogs{$env{'request.course.id'}}.='&'.$what;
2243: } else {
2244: $courselogs{$env{'request.course.id'}}.=$what;
2245: }
2246: if (length($courselogs{$env{'request.course.id'}})>4048) {
2247: &flushcourselogs();
2248: }
2249: }
2250:
2251: sub courseacclog {
2252: my $fnsymb=shift;
2253: unless ($env{'request.course.id'}) { return ''; }
2254: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
2255: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
2256: $what.=':POST';
2257: # FIXME: Probably ought to escape things....
2258: foreach my $key (keys(%env)) {
2259: if ($key=~/^form\.(.*)/) {
2260: $what.=':'.$1.'='.$env{$key};
2261: }
2262: }
2263: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
2264: # FIXME: We should not be depending on a form parameter that someone
2265: # editing lonsearchcat.pm might change in the future.
2266: if ($env{'form.phase'} eq 'course_search') {
2267: $what.= ':POST';
2268: # FIXME: Probably ought to escape things....
2269: foreach my $element ('courseexp','crsfulltext','crsrelated',
2270: 'crsdiscuss') {
2271: $what.=':'.$element.'='.$env{'form.'.$element};
2272: }
2273: }
2274: }
2275: &courselog($what);
2276: }
2277:
2278: sub countacc {
2279: my $url=&declutter(shift);
2280: return if (! defined($url) || $url eq '');
2281: unless ($env{'request.course.id'}) { return ''; }
2282: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
2283: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
2284: $accesshash{$key}++;
2285: }
2286:
2287: sub linklog {
2288: my ($from,$to)=@_;
2289: $from=&declutter($from);
2290: $to=&declutter($to);
2291: $accesshash{$from.'___'.$to.'___comefrom'}=1;
2292: $accesshash{$to.'___'.$from.'___goto'}=1;
2293: }
2294:
2295: sub userrolelog {
2296: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
2297: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
2298: ($trole=~/^in/) || ($trole=~/^cc/) ||
2299: ($trole=~/^ep/) || ($trole=~/^cr/) ||
2300: ($trole=~/^ta/)) {
2301: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
2302: $userrolehash
2303: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
2304: =$tend.':'.$tstart;
2305: }
2306: if (($env{'request.role'} =~ /dc\./) &&
2307: (($trole=~/^au/) || ($trole=~/^in/) ||
2308: ($trole=~/^cc/) || ($trole=~/^ep/) ||
2309: ($trole=~/^cr/) || ($trole=~/^ta/))) {
2310: $userrolehash
2311: {$trole.':'.$username.':'.$domain.':'.$env{'user.name'}.':'.$env{'user.domain'}.':'}
2312: =$tend.':'.$tstart;
2313: }
2314: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
2315: ($trole=~/^li/) || ($trole=~/^li/) ||
2316: ($trole=~/^au/) || ($trole=~/^dg/) ||
2317: ($trole=~/^sc/)) {
2318: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
2319: $domainrolehash
2320: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
2321: = $tend.':'.$tstart;
2322: }
2323: }
2324:
2325: sub get_course_adv_roles {
2326: my $cid=shift;
2327: $cid=$env{'request.course.id'} unless (defined($cid));
2328: my %coursehash=&coursedescription($cid);
2329: my %nothide=();
2330: foreach my $user (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
2331: $nothide{join(':',split(/[\@\:]/,$user))}=1;
2332: }
2333: my %returnhash=();
2334: my %dumphash=
2335: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
2336: my $now=time;
2337: foreach my $entry (keys %dumphash) {
2338: my ($tend,$tstart)=split(/\:/,$dumphash{$entry});
2339: if (($tstart) && ($tstart<0)) { next; }
2340: if (($tend) && ($tend<$now)) { next; }
2341: if (($tstart) && ($now<$tstart)) { next; }
2342: my ($role,$username,$domain,$section)=split(/\:/,$entry);
2343: if ($username eq '' || $domain eq '') { next; }
2344: if ((&privileged($username,$domain)) &&
2345: (!$nothide{$username.':'.$domain})) { next; }
2346: if ($role eq 'cr') { next; }
2347: my $key=&plaintext($role);
2348: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
2349: if ($returnhash{$key}) {
2350: $returnhash{$key}.=','.$username.':'.$domain;
2351: } else {
2352: $returnhash{$key}=$username.':'.$domain;
2353: }
2354: }
2355: return %returnhash;
2356: }
2357:
2358: sub get_my_roles {
2359: my ($uname,$udom,$context,$types,$roles,$roledoms)=@_;
2360: unless (defined($uname)) { $uname=$env{'user.name'}; }
2361: unless (defined($udom)) { $udom=$env{'user.domain'}; }
2362: my %dumphash;
2363: if ($context eq 'userroles') {
2364: %dumphash = &dump('roles',$udom,$uname);
2365: } else {
2366: %dumphash=
2367: &dump('nohist_userroles',$udom,$uname);
2368: }
2369: my %returnhash=();
2370: my $now=time;
2371: foreach my $entry (keys(%dumphash)) {
2372: my ($role,$tend,$tstart);
2373: if ($context eq 'userroles') {
2374: ($role,$tend,$tstart)=split(/_/,$dumphash{$entry});
2375: } else {
2376: ($tend,$tstart)=split(/\:/,$dumphash{$entry});
2377: }
2378: if (($tstart) && ($tstart<0)) { next; }
2379: my $status = 'active';
2380: if (($tend) && ($tend<$now)) {
2381: $status = 'previous';
2382: }
2383: if (($tstart) && ($now<$tstart)) {
2384: $status = 'future';
2385: }
2386: if (ref($types) eq 'ARRAY') {
2387: if (!grep(/^\Q$status\E$/,@{$types})) {
2388: next;
2389: }
2390: } else {
2391: if ($status ne 'active') {
2392: next;
2393: }
2394: }
2395: my ($rolecode,$username,$domain,$section,$area);
2396: if ($context eq 'userroles') {
2397: ($area,$rolecode) = split(/_/,$entry);
2398: (undef,$domain,$username,$section) = split(/\//,$area);
2399: } else {
2400: ($role,$username,$domain,$section) = split(/\:/,$entry);
2401: }
2402: if (ref($roledoms) eq 'ARRAY') {
2403: if (!grep(/^\Q$domain\E$/,@{$roledoms})) {
2404: next;
2405: }
2406: }
2407: if (ref($roles) eq 'ARRAY') {
2408: if (!grep(/^\Q$role\E$/,@{$roles})) {
2409: next;
2410: }
2411: }
2412: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
2413: }
2414: return %returnhash;
2415: }
2416:
2417: # ----------------------------------------------------- Frontpage Announcements
2418: #
2419: #
2420:
2421: sub postannounce {
2422: my ($server,$text)=@_;
2423: unless (&allowed('psa',&host_domain($server))) { return 'refused'; }
2424: unless ($text=~/\w/) { $text=''; }
2425: return &reply('setannounce:'.&escape($text),$server);
2426: }
2427:
2428: sub getannounce {
2429:
2430: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
2431: my $announcement='';
2432: while (my $line = <$fh>) { $announcement .= $line; }
2433: close($fh);
2434: if ($announcement=~/\w/) {
2435: return
2436: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
2437: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
2438: } else {
2439: return '';
2440: }
2441: } else {
2442: return '';
2443: }
2444: }
2445:
2446: # ---------------------------------------------------------- Course ID routines
2447: # Deal with domain's nohist_courseid.db files
2448: #
2449:
2450: sub courseidput {
2451: my ($domain,$what,$coursehome)=@_;
2452: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
2453: }
2454:
2455: sub courseiddump {
2456: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref,$typefilter,$regexp_ok)=@_;
2457: my %returnhash=();
2458: unless ($domfilter) { $domfilter=''; }
2459: my %libserv = &all_library();
2460: foreach my $tryserver (keys(%libserv)) {
2461: if ( ( $hostidflag == 1
2462: && grep(/^\Q$tryserver\E$/,@{$hostidref}) )
2463: || (!defined($hostidflag)) ) {
2464:
2465: if ($domfilter eq ''
2466: || (&host_domain($tryserver) eq $domfilter)) {
2467: foreach my $line (
2468: split(/\&/,&reply('courseiddump:'.&host_domain($tryserver).':'.
2469: $sincefilter.':'.&escape($descfilter).':'.
2470: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter).':'.&escape($typefilter).':'.&escape($regexp_ok),
2471: $tryserver))) {
2472: my ($key,$value)=split(/\=/,$line,2);
2473: if (($key) && ($value)) {
2474: $returnhash{&unescape($key)}=$value;
2475: }
2476: }
2477: }
2478: }
2479: }
2480: return %returnhash;
2481: }
2482:
2483: # ---------------------------------------------------------- DC e-mail
2484:
2485: sub dcmailput {
2486: my ($domain,$msgid,$message,$server)=@_;
2487: my $status = &Apache::lonnet::critical(
2488: 'dcmailput:'.$domain.':'.&escape($msgid).'='.
2489: &escape($message),$server);
2490: return $status;
2491: }
2492:
2493: sub dcmaildump {
2494: my ($dom,$startdate,$enddate,$senders) = @_;
2495: my %returnhash=();
2496:
2497: if (defined(&domain($dom,'primary'))) {
2498: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
2499: &escape($enddate).':';
2500: my @esc_senders=map { &escape($_)} @$senders;
2501: $cmd.=&escape(join('&',@esc_senders));
2502: foreach my $line (split(/\&/,&reply($cmd,&domain($dom,'primary')))) {
2503: my ($key,$value) = split(/\=/,$line,2);
2504: if (($key) && ($value)) {
2505: $returnhash{&unescape($key)} = &unescape($value);
2506: }
2507: }
2508: }
2509: return %returnhash;
2510: }
2511: # ---------------------------------------------------------- Domain roles
2512:
2513: sub get_domain_roles {
2514: my ($dom,$roles,$startdate,$enddate)=@_;
2515: if (undef($startdate) || $startdate eq '') {
2516: $startdate = '.';
2517: }
2518: if (undef($enddate) || $enddate eq '') {
2519: $enddate = '.';
2520: }
2521: my $rolelist = join(':',@{$roles});
2522: my %personnel = ();
2523:
2524: my %servers = &get_servers($dom,'library');
2525: foreach my $tryserver (keys(%servers)) {
2526: %{$personnel{$tryserver}}=();
2527: foreach my $line (split(/\&/,&reply('domrolesdump:'.$dom.':'.
2528: &escape($startdate).':'.
2529: &escape($enddate).':'.
2530: &escape($rolelist), $tryserver))) {
2531: my ($key,$value) = split(/\=/,$line,2);
2532: if (($key) && ($value)) {
2533: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
2534: }
2535: }
2536: }
2537: return %personnel;
2538: }
2539:
2540: # ----------------------------------------------------------- Check out an item
2541:
2542: sub get_first_access {
2543: my ($type,$argsymb)=@_;
2544: my ($symb,$courseid,$udom,$uname)=&whichuser();
2545: if ($argsymb) { $symb=$argsymb; }
2546: my ($map,$id,$res)=&decode_symb($symb);
2547: if ($type eq 'map') {
2548: $res=&symbread($map);
2549: } else {
2550: $res=$symb;
2551: }
2552: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
2553: return $times{"$courseid\0$res"};
2554: }
2555:
2556: sub set_first_access {
2557: my ($type)=@_;
2558: my ($symb,$courseid,$udom,$uname)=&whichuser();
2559: my ($map,$id,$res)=&decode_symb($symb);
2560: if ($type eq 'map') {
2561: $res=&symbread($map);
2562: } else {
2563: $res=$symb;
2564: }
2565: my $firstaccess=&get_first_access($type,$symb);
2566: if (!$firstaccess) {
2567: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
2568: }
2569: return 'already_set';
2570: }
2571:
2572: sub checkout {
2573: my ($symb,$tuname,$tudom,$tcrsid)=@_;
2574: my $now=time;
2575: my $lonhost=$perlvar{'lonHostID'};
2576: my $infostr=&escape(
2577: 'CHECKOUTTOKEN&'.
2578: $tuname.'&'.
2579: $tudom.'&'.
2580: $tcrsid.'&'.
2581: $symb.'&'.
2582: $now.'&'.$ENV{'REMOTE_ADDR'});
2583: my $token=&reply('tmpput:'.$infostr,$lonhost);
2584: if ($token=~/^error\:/) {
2585: &logthis("<font color=\"blue\">WARNING: ".
2586: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
2587: "</font>");
2588: return '';
2589: }
2590:
2591: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
2592: $token=~tr/a-z/A-Z/;
2593:
2594: my %infohash=('resource.0.outtoken' => $token,
2595: 'resource.0.checkouttime' => $now,
2596: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
2597:
2598: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2599: return '';
2600: } else {
2601: &logthis("<font color=\"blue\">WARNING: ".
2602: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
2603: "</font>");
2604: }
2605:
2606: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2607: &escape('Checkout '.$infostr.' - '.
2608: $token)) ne 'ok') {
2609: return '';
2610: } else {
2611: &logthis("<font color=\"blue\">WARNING: ".
2612: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
2613: "</font>");
2614: }
2615: return $token;
2616: }
2617:
2618: # ------------------------------------------------------------ Check in an item
2619:
2620: sub checkin {
2621: my $token=shift;
2622: my $now=time;
2623: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2624: $lonhost=~tr/A-Z/a-z/;
2625: my $dtoken=$ta.'_'.&hostname($lonhost).'_'.$tb;
2626: $dtoken=~s/\W/\_/g;
2627: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2628: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2629:
2630: unless (($tuname) && ($tudom)) {
2631: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2632: return '';
2633: }
2634:
2635: unless (&allowed('mgr',$tcrsid)) {
2636: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2637: $env{'user.name'}.' - '.$env{'user.domain'});
2638: return '';
2639: }
2640:
2641: my %infohash=('resource.0.intoken' => $token,
2642: 'resource.0.checkintime' => $now,
2643: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2644:
2645: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2646: return '';
2647: }
2648:
2649: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2650: &escape('Checkin - '.$token)) ne 'ok') {
2651: return '';
2652: }
2653:
2654: return ($symb,$tuname,$tudom,$tcrsid);
2655: }
2656:
2657: # --------------------------------------------- Set Expire Date for Spreadsheet
2658:
2659: sub expirespread {
2660: my ($uname,$udom,$stype,$usymb)=@_;
2661: my $cid=$env{'request.course.id'};
2662: if ($cid) {
2663: my $now=time;
2664: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2665: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2666: $env{'course.'.$cid.'.num'}.
2667: ':nohist_expirationdates:'.
2668: &escape($key).'='.$now,
2669: $env{'course.'.$cid.'.home'})
2670: }
2671: return 'ok';
2672: }
2673:
2674: # ----------------------------------------------------- Devalidate Spreadsheets
2675:
2676: sub devalidate {
2677: my ($symb,$uname,$udom)=@_;
2678: my $cid=$env{'request.course.id'};
2679: if ($cid) {
2680: # delete the stored spreadsheets for
2681: # - the student level sheet of this user in course's homespace
2682: # - the assessment level sheet for this resource
2683: # for this user in user's homespace
2684: # - current conditional state info
2685: my $key=$uname.':'.$udom.':';
2686: my $status=
2687: &del('nohist_calculatedsheets',
2688: [$key.'studentcalc:'],
2689: $env{'course.'.$cid.'.domain'},
2690: $env{'course.'.$cid.'.num'})
2691: .' '.
2692: &del('nohist_calculatedsheets_'.$cid,
2693: [$key.'assesscalc:'.$symb],$udom,$uname);
2694: unless ($status eq 'ok ok') {
2695: &logthis('Could not devalidate spreadsheet '.
2696: $uname.' at '.$udom.' for '.
2697: $symb.': '.$status);
2698: }
2699: &delenv('user.state.'.$cid);
2700: }
2701: }
2702:
2703: sub get_scalar {
2704: my ($string,$end) = @_;
2705: my $value;
2706: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2707: $value = $1;
2708: } elsif ($$string =~ s/^([^&]*?)&//) {
2709: $value = $1;
2710: }
2711: return &unescape($value);
2712: }
2713:
2714: sub array2str {
2715: my (@array) = @_;
2716: my $result=&arrayref2str(\@array);
2717: $result=~s/^__ARRAY_REF__//;
2718: $result=~s/__END_ARRAY_REF__$//;
2719: return $result;
2720: }
2721:
2722: sub arrayref2str {
2723: my ($arrayref) = @_;
2724: my $result='__ARRAY_REF__';
2725: foreach my $elem (@$arrayref) {
2726: if(ref($elem) eq 'ARRAY') {
2727: $result.=&arrayref2str($elem).'&';
2728: } elsif(ref($elem) eq 'HASH') {
2729: $result.=&hashref2str($elem).'&';
2730: } elsif(ref($elem)) {
2731: #print("Got a ref of ".(ref($elem))." skipping.");
2732: } else {
2733: $result.=&escape($elem).'&';
2734: }
2735: }
2736: $result=~s/\&$//;
2737: $result .= '__END_ARRAY_REF__';
2738: return $result;
2739: }
2740:
2741: sub hash2str {
2742: my (%hash) = @_;
2743: my $result=&hashref2str(\%hash);
2744: $result=~s/^__HASH_REF__//;
2745: $result=~s/__END_HASH_REF__$//;
2746: return $result;
2747: }
2748:
2749: sub hashref2str {
2750: my ($hashref)=@_;
2751: my $result='__HASH_REF__';
2752: foreach my $key (sort(keys(%$hashref))) {
2753: if (ref($key) eq 'ARRAY') {
2754: $result.=&arrayref2str($key).'=';
2755: } elsif (ref($key) eq 'HASH') {
2756: $result.=&hashref2str($key).'=';
2757: } elsif (ref($key)) {
2758: $result.='=';
2759: #print("Got a ref of ".(ref($key))." skipping.");
2760: } else {
2761: if ($key) {$result.=&escape($key).'=';} else { last; }
2762: }
2763:
2764: if(ref($hashref->{$key}) eq 'ARRAY') {
2765: $result.=&arrayref2str($hashref->{$key}).'&';
2766: } elsif(ref($hashref->{$key}) eq 'HASH') {
2767: $result.=&hashref2str($hashref->{$key}).'&';
2768: } elsif(ref($hashref->{$key})) {
2769: $result.='&';
2770: #print("Got a ref of ".(ref($hashref->{$key}))." skipping.");
2771: } else {
2772: $result.=&escape($hashref->{$key}).'&';
2773: }
2774: }
2775: $result=~s/\&$//;
2776: $result .= '__END_HASH_REF__';
2777: return $result;
2778: }
2779:
2780: sub str2hash {
2781: my ($string)=@_;
2782: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2783: return %$hash;
2784: }
2785:
2786: sub str2hashref {
2787: my ($string) = @_;
2788:
2789: my %hash;
2790:
2791: if($string !~ /^__HASH_REF__/) {
2792: if (! ($string eq '' || !defined($string))) {
2793: $hash{'error'}='Not hash reference';
2794: }
2795: return (\%hash, $string);
2796: }
2797:
2798: $string =~ s/^__HASH_REF__//;
2799:
2800: while($string !~ /^__END_HASH_REF__/) {
2801: #key
2802: my $key='';
2803: if($string =~ /^__HASH_REF__/) {
2804: ($key, $string)=&str2hashref($string);
2805: if(defined($key->{'error'})) {
2806: $hash{'error'}='Bad data';
2807: return (\%hash, $string);
2808: }
2809: } elsif($string =~ /^__ARRAY_REF__/) {
2810: ($key, $string)=&str2arrayref($string);
2811: if($key->[0] eq 'Array reference error') {
2812: $hash{'error'}='Bad data';
2813: return (\%hash, $string);
2814: }
2815: } else {
2816: $string =~ s/^(.*?)=//;
2817: $key=&unescape($1);
2818: }
2819: $string =~ s/^=//;
2820:
2821: #value
2822: my $value='';
2823: if($string =~ /^__HASH_REF__/) {
2824: ($value, $string)=&str2hashref($string);
2825: if(defined($value->{'error'})) {
2826: $hash{'error'}='Bad data';
2827: return (\%hash, $string);
2828: }
2829: } elsif($string =~ /^__ARRAY_REF__/) {
2830: ($value, $string)=&str2arrayref($string);
2831: if($value->[0] eq 'Array reference error') {
2832: $hash{'error'}='Bad data';
2833: return (\%hash, $string);
2834: }
2835: } else {
2836: $value=&get_scalar(\$string,'__END_HASH_REF__');
2837: }
2838: $string =~ s/^&//;
2839:
2840: $hash{$key}=$value;
2841: }
2842:
2843: $string =~ s/^__END_HASH_REF__//;
2844:
2845: return (\%hash, $string);
2846: }
2847:
2848: sub str2array {
2849: my ($string)=@_;
2850: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2851: return @$array;
2852: }
2853:
2854: sub str2arrayref {
2855: my ($string) = @_;
2856: my @array;
2857:
2858: if($string !~ /^__ARRAY_REF__/) {
2859: if (! ($string eq '' || !defined($string))) {
2860: $array[0]='Array reference error';
2861: }
2862: return (\@array, $string);
2863: }
2864:
2865: $string =~ s/^__ARRAY_REF__//;
2866:
2867: while($string !~ /^__END_ARRAY_REF__/) {
2868: my $value='';
2869: if($string =~ /^__HASH_REF__/) {
2870: ($value, $string)=&str2hashref($string);
2871: if(defined($value->{'error'})) {
2872: $array[0] ='Array reference error';
2873: return (\@array, $string);
2874: }
2875: } elsif($string =~ /^__ARRAY_REF__/) {
2876: ($value, $string)=&str2arrayref($string);
2877: if($value->[0] eq 'Array reference error') {
2878: $array[0] ='Array reference error';
2879: return (\@array, $string);
2880: }
2881: } else {
2882: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2883: }
2884: $string =~ s/^&//;
2885:
2886: push(@array, $value);
2887: }
2888:
2889: $string =~ s/^__END_ARRAY_REF__//;
2890:
2891: return (\@array, $string);
2892: }
2893:
2894: # -------------------------------------------------------------------Temp Store
2895:
2896: sub tmpreset {
2897: my ($symb,$namespace,$domain,$stuname) = @_;
2898: if (!$symb) {
2899: $symb=&symbread();
2900: if (!$symb) { $symb= $env{'request.url'}; }
2901: }
2902: $symb=escape($symb);
2903:
2904: if (!$namespace) { $namespace=$env{'request.state'}; }
2905: $namespace=~s/\//\_/g;
2906: $namespace=~s/\W//g;
2907:
2908: if (!$domain) { $domain=$env{'user.domain'}; }
2909: if (!$stuname) { $stuname=$env{'user.name'}; }
2910: if ($domain eq 'public' && $stuname eq 'public') {
2911: $stuname=$ENV{'REMOTE_ADDR'};
2912: }
2913: my $path=$perlvar{'lonDaemons'}.'/tmp';
2914: my %hash;
2915: if (tie(%hash,'GDBM_File',
2916: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2917: &GDBM_WRCREAT(),0640)) {
2918: foreach my $key (keys %hash) {
2919: if ($key=~ /:$symb/) {
2920: delete($hash{$key});
2921: }
2922: }
2923: }
2924: }
2925:
2926: sub tmpstore {
2927: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2928:
2929: if (!$symb) {
2930: $symb=&symbread();
2931: if (!$symb) { $symb= $env{'request.url'}; }
2932: }
2933: $symb=escape($symb);
2934:
2935: if (!$namespace) {
2936: # I don't think we would ever want to store this for a course.
2937: # it seems this will only be used if we don't have a course.
2938: #$namespace=$env{'request.course.id'};
2939: #if (!$namespace) {
2940: $namespace=$env{'request.state'};
2941: #}
2942: }
2943: $namespace=~s/\//\_/g;
2944: $namespace=~s/\W//g;
2945: if (!$domain) { $domain=$env{'user.domain'}; }
2946: if (!$stuname) { $stuname=$env{'user.name'}; }
2947: if ($domain eq 'public' && $stuname eq 'public') {
2948: $stuname=$ENV{'REMOTE_ADDR'};
2949: }
2950: my $now=time;
2951: my %hash;
2952: my $path=$perlvar{'lonDaemons'}.'/tmp';
2953: if (tie(%hash,'GDBM_File',
2954: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2955: &GDBM_WRCREAT(),0640)) {
2956: $hash{"version:$symb"}++;
2957: my $version=$hash{"version:$symb"};
2958: my $allkeys='';
2959: foreach my $key (keys(%$storehash)) {
2960: $allkeys.=$key.':';
2961: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2962: }
2963: $hash{"$version:$symb:timestamp"}=$now;
2964: $allkeys.='timestamp';
2965: $hash{"$version:keys:$symb"}=$allkeys;
2966: if (untie(%hash)) {
2967: return 'ok';
2968: } else {
2969: return "error:$!";
2970: }
2971: } else {
2972: return "error:$!";
2973: }
2974: }
2975:
2976: # -----------------------------------------------------------------Temp Restore
2977:
2978: sub tmprestore {
2979: my ($symb,$namespace,$domain,$stuname) = @_;
2980:
2981: if (!$symb) {
2982: $symb=&symbread();
2983: if (!$symb) { $symb= $env{'request.url'}; }
2984: }
2985: $symb=escape($symb);
2986:
2987: if (!$namespace) { $namespace=$env{'request.state'}; }
2988:
2989: if (!$domain) { $domain=$env{'user.domain'}; }
2990: if (!$stuname) { $stuname=$env{'user.name'}; }
2991: if ($domain eq 'public' && $stuname eq 'public') {
2992: $stuname=$ENV{'REMOTE_ADDR'};
2993: }
2994: my %returnhash;
2995: $namespace=~s/\//\_/g;
2996: $namespace=~s/\W//g;
2997: my %hash;
2998: my $path=$perlvar{'lonDaemons'}.'/tmp';
2999: if (tie(%hash,'GDBM_File',
3000: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
3001: &GDBM_READER(),0640)) {
3002: my $version=$hash{"version:$symb"};
3003: $returnhash{'version'}=$version;
3004: my $scope;
3005: for ($scope=1;$scope<=$version;$scope++) {
3006: my $vkeys=$hash{"$scope:keys:$symb"};
3007: my @keys=split(/:/,$vkeys);
3008: my $key;
3009: $returnhash{"$scope:keys"}=$vkeys;
3010: foreach $key (@keys) {
3011: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
3012: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
3013: }
3014: }
3015: if (!(untie(%hash))) {
3016: return "error:$!";
3017: }
3018: } else {
3019: return "error:$!";
3020: }
3021: return %returnhash;
3022: }
3023:
3024: # ----------------------------------------------------------------------- Store
3025:
3026: sub store {
3027: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
3028: my $home='';
3029:
3030: if ($stuname) { $home=&homeserver($stuname,$domain); }
3031:
3032: $symb=&symbclean($symb);
3033: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
3034:
3035: if (!$domain) { $domain=$env{'user.domain'}; }
3036: if (!$stuname) { $stuname=$env{'user.name'}; }
3037:
3038: &devalidate($symb,$stuname,$domain);
3039:
3040: $symb=escape($symb);
3041: if (!$namespace) {
3042: unless ($namespace=$env{'request.course.id'}) {
3043: return '';
3044: }
3045: }
3046: if (!$home) { $home=$env{'user.home'}; }
3047:
3048: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
3049: $$storehash{'host'}=$perlvar{'lonHostID'};
3050:
3051: my $namevalue='';
3052: foreach my $key (keys(%$storehash)) {
3053: $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3054: }
3055: $namevalue=~s/\&$//;
3056: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
3057: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
3058: }
3059:
3060: # -------------------------------------------------------------- Critical Store
3061:
3062: sub cstore {
3063: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
3064: my $home='';
3065:
3066: if ($stuname) { $home=&homeserver($stuname,$domain); }
3067:
3068: $symb=&symbclean($symb);
3069: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
3070:
3071: if (!$domain) { $domain=$env{'user.domain'}; }
3072: if (!$stuname) { $stuname=$env{'user.name'}; }
3073:
3074: &devalidate($symb,$stuname,$domain);
3075:
3076: $symb=escape($symb);
3077: if (!$namespace) {
3078: unless ($namespace=$env{'request.course.id'}) {
3079: return '';
3080: }
3081: }
3082: if (!$home) { $home=$env{'user.home'}; }
3083:
3084: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
3085: $$storehash{'host'}=$perlvar{'lonHostID'};
3086:
3087: my $namevalue='';
3088: foreach my $key (keys(%$storehash)) {
3089: $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3090: }
3091: $namevalue=~s/\&$//;
3092: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
3093: return critical
3094: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
3095: }
3096:
3097: # --------------------------------------------------------------------- Restore
3098:
3099: sub restore {
3100: my ($symb,$namespace,$domain,$stuname) = @_;
3101: my $home='';
3102:
3103: if ($stuname) { $home=&homeserver($stuname,$domain); }
3104:
3105: if (!$symb) {
3106: unless ($symb=escape(&symbread())) { return ''; }
3107: } else {
3108: $symb=&escape(&symbclean($symb));
3109: }
3110: if (!$namespace) {
3111: unless ($namespace=$env{'request.course.id'}) {
3112: return '';
3113: }
3114: }
3115: if (!$domain) { $domain=$env{'user.domain'}; }
3116: if (!$stuname) { $stuname=$env{'user.name'}; }
3117: if (!$home) { $home=$env{'user.home'}; }
3118: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
3119:
3120: my %returnhash=();
3121: foreach my $line (split(/\&/,$answer)) {
3122: my ($name,$value)=split(/\=/,$line);
3123: $returnhash{&unescape($name)}=&thaw_unescape($value);
3124: }
3125: my $version;
3126: for ($version=1;$version<=$returnhash{'version'};$version++) {
3127: foreach my $item (split(/\:/,$returnhash{$version.':keys'})) {
3128: $returnhash{$item}=$returnhash{$version.':'.$item};
3129: }
3130: }
3131: return %returnhash;
3132: }
3133:
3134: # ---------------------------------------------------------- Course Description
3135:
3136: sub coursedescription {
3137: my ($courseid,$args)=@_;
3138: $courseid=~s/^\///;
3139: $courseid=~s/\_/\//g;
3140: my ($cdomain,$cnum)=split(/\//,$courseid);
3141: my $chome=&homeserver($cnum,$cdomain);
3142: my $normalid=$cdomain.'_'.$cnum;
3143: # need to always cache even if we get errors otherwise we keep
3144: # trying and trying and trying to get the course description.
3145: my %envhash=();
3146: my %returnhash=();
3147:
3148: my $expiretime=600;
3149: if ($env{'request.course.id'} eq $normalid) {
3150: $expiretime=120;
3151: }
3152:
3153: my $prefix='course.'.$cdomain.'_'.$cnum.'.';
3154: if (!$args->{'freshen_cache'}
3155: && ((time-$env{$prefix.'last_cache'}) < $expiretime) ) {
3156: foreach my $key (keys(%env)) {
3157: next if ($key !~ /^\Q$prefix\E(.*)/);
3158: my ($setting) = $1;
3159: $returnhash{$setting} = $env{$key};
3160: }
3161: return %returnhash;
3162: }
3163:
3164: # get the data agin
3165: if (!$args->{'one_time'}) {
3166: $envhash{'course.'.$normalid.'.last_cache'}=time;
3167: }
3168:
3169: if ($chome ne 'no_host') {
3170: %returnhash=&dump('environment',$cdomain,$cnum);
3171: if (!exists($returnhash{'con_lost'})) {
3172: $returnhash{'home'}= $chome;
3173: $returnhash{'domain'} = $cdomain;
3174: $returnhash{'num'} = $cnum;
3175: if (!defined($returnhash{'type'})) {
3176: $returnhash{'type'} = 'Course';
3177: }
3178: while (my ($name,$value) = each %returnhash) {
3179: $envhash{'course.'.$normalid.'.'.$name}=$value;
3180: }
3181: $returnhash{'url'}=&clutter($returnhash{'url'});
3182: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
3183: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
3184: $envhash{'course.'.$normalid.'.home'}=$chome;
3185: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
3186: $envhash{'course.'.$normalid.'.num'}=$cnum;
3187: }
3188: }
3189: if (!$args->{'one_time'}) {
3190: &appenv(%envhash);
3191: }
3192: return %returnhash;
3193: }
3194:
3195: # -------------------------------------------------See if a user is privileged
3196:
3197: sub privileged {
3198: my ($username,$domain)=@_;
3199: my $rolesdump=&reply("dump:$domain:$username:roles",
3200: &homeserver($username,$domain));
3201: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
3202: my $now=time;
3203: if ($rolesdump ne '') {
3204: foreach my $entry (split(/&/,$rolesdump)) {
3205: if ($entry!~/^rolesdef_/) {
3206: my ($area,$role)=split(/=/,$entry);
3207: $area=~s/\_\w\w$//;
3208: my ($trole,$tend,$tstart)=split(/_/,$role);
3209: if (($trole eq 'dc') || ($trole eq 'su')) {
3210: my $active=1;
3211: if ($tend) {
3212: if ($tend<$now) { $active=0; }
3213: }
3214: if ($tstart) {
3215: if ($tstart>$now) { $active=0; }
3216: }
3217: if ($active) { return 1; }
3218: }
3219: }
3220: }
3221: }
3222: return 0;
3223: }
3224:
3225: # -------------------------------------------------------- Get user privileges
3226:
3227: sub rolesinit {
3228: my ($domain,$username,$authhost)=@_;
3229: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
3230: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
3231: my %allroles=();
3232: my %allgroups=();
3233: my $now=time;
3234: my %userroles = ('user.login.time' => $now);
3235: my $group_privs;
3236:
3237: if ($rolesdump ne '') {
3238: foreach my $entry (split(/&/,$rolesdump)) {
3239: if ($entry!~/^rolesdef_/) {
3240: my ($area,$role)=split(/=/,$entry);
3241: $area=~s/\_\w\w$//;
3242: my ($trole,$tend,$tstart,$group_privs);
3243: if ($role=~/^cr/) {
3244: if ($role=~m|^(cr/$match_domain/$match_username/[a-zA-Z0-9]+)_(.*)$|) {
3245: ($trole,my $trest)=($role=~m|^(cr/$match_domain/$match_username/[a-zA-Z0-9]+)_(.*)$|);
3246: ($tend,$tstart)=split('_',$trest);
3247: } else {
3248: $trole=$role;
3249: }
3250: } elsif ($role =~ m|^gr/|) {
3251: ($trole,$tend,$tstart) = split(/_/,$role);
3252: ($trole,$group_privs) = split(/\//,$trole);
3253: $group_privs = &unescape($group_privs);
3254: } else {
3255: ($trole,$tend,$tstart)=split(/_/,$role);
3256: }
3257: my %new_role = &set_arearole($trole,$area,$tstart,$tend,$domain,
3258: $username);
3259: @userroles{keys(%new_role)} = @new_role{keys(%new_role)};
3260: if (($tend!=0) && ($tend<$now)) { $trole=''; }
3261: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
3262: if (($area ne '') && ($trole ne '')) {
3263: my $spec=$trole.'.'.$area;
3264: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
3265: if ($trole =~ /^cr\//) {
3266: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
3267: } elsif ($trole eq 'gr') {
3268: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
3269: } else {
3270: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
3271: }
3272: }
3273: }
3274: }
3275: my ($author,$adv) = &set_userprivs(\%userroles,\%allroles,\%allgroups);
3276: $userroles{'user.adv'} = $adv;
3277: $userroles{'user.author'} = $author;
3278: $env{'user.adv'}=$adv;
3279: }
3280: return \%userroles;
3281: }
3282:
3283: sub set_arearole {
3284: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
3285: # log the associated role with the area
3286: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
3287: return ('user.role.'.$trole.'.'.$area => $tstart.'.'.$tend);
3288: }
3289:
3290: sub custom_roleprivs {
3291: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
3292: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
3293: my $homsvr=homeserver($rauthor,$rdomain);
3294: if (&hostname($homsvr) ne '') {
3295: my ($rdummy,$roledef)=
3296: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
3297: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
3298: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
3299: if (defined($syspriv)) {
3300: $$allroles{'cm./'}.=':'.$syspriv;
3301: $$allroles{$spec.'./'}.=':'.$syspriv;
3302: }
3303: if ($tdomain ne '') {
3304: if (defined($dompriv)) {
3305: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
3306: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
3307: }
3308: if (($trest ne '') && (defined($coursepriv))) {
3309: $$allroles{'cm.'.$area}.=':'.$coursepriv;
3310: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
3311: }
3312: }
3313: }
3314: }
3315: }
3316:
3317: sub group_roleprivs {
3318: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
3319: my $access = 1;
3320: my $now = time;
3321: if (($tend!=0) && ($tend<$now)) { $access = 0; }
3322: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
3323: if ($access) {
3324: my ($course,$group) = ($area =~ m|(/$match_domain/$match_courseid)/([^/]+)$|);
3325: $$allgroups{$course}{$group} .=':'.$group_privs;
3326: }
3327: }
3328:
3329: sub standard_roleprivs {
3330: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
3331: if (defined($pr{$trole.':s'})) {
3332: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
3333: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
3334: }
3335: if ($tdomain ne '') {
3336: if (defined($pr{$trole.':d'})) {
3337: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
3338: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
3339: }
3340: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
3341: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
3342: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
3343: }
3344: }
3345: }
3346:
3347: sub set_userprivs {
3348: my ($userroles,$allroles,$allgroups) = @_;
3349: my $author=0;
3350: my $adv=0;
3351: my %grouproles = ();
3352: if (keys(%{$allgroups}) > 0) {
3353: foreach my $role (keys %{$allroles}) {
3354: my ($trole,$area,$sec,$extendedarea);
3355: if ($role =~ m-^(\w+|cr/$match_domain/$match_username/\w+)\.(/$match_domain/$match_courseid)(/?\w*)\.-) {
3356: $trole = $1;
3357: $area = $2;
3358: $sec = $3;
3359: $extendedarea = $area.$sec;
3360: if (exists($$allgroups{$area})) {
3361: foreach my $group (keys(%{$$allgroups{$area}})) {
3362: my $spec = $trole.'.'.$extendedarea;
3363: $grouproles{$spec.'.'.$area.'/'.$group} =
3364: $$allgroups{$area}{$group};
3365: }
3366: }
3367: }
3368: }
3369: }
3370: foreach my $group (keys(%grouproles)) {
3371: $$allroles{$group} = $grouproles{$group};
3372: }
3373: foreach my $role (keys(%{$allroles})) {
3374: my %thesepriv;
3375: if (($role=~/^au/) || ($role=~/^ca/)) { $author=1; }
3376: foreach my $item (split(/:/,$$allroles{$role})) {
3377: if ($item ne '') {
3378: my ($privilege,$restrictions)=split(/&/,$item);
3379: if ($restrictions eq '') {
3380: $thesepriv{$privilege}='F';
3381: } elsif ($thesepriv{$privilege} ne 'F') {
3382: $thesepriv{$privilege}.=$restrictions;
3383: }
3384: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
3385: }
3386: }
3387: my $thesestr='';
3388: foreach my $priv (keys(%thesepriv)) {
3389: $thesestr.=':'.$priv.'&'.$thesepriv{$priv};
3390: }
3391: $userroles->{'user.priv.'.$role} = $thesestr;
3392: }
3393: return ($author,$adv);
3394: }
3395:
3396: # --------------------------------------------------------------- get interface
3397:
3398: sub get {
3399: my ($namespace,$storearr,$udomain,$uname)=@_;
3400: my $items='';
3401: foreach my $item (@$storearr) {
3402: $items.=&escape($item).'&';
3403: }
3404: $items=~s/\&$//;
3405: if (!$udomain) { $udomain=$env{'user.domain'}; }
3406: if (!$uname) { $uname=$env{'user.name'}; }
3407: my $uhome=&homeserver($uname,$udomain);
3408:
3409: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
3410: my @pairs=split(/\&/,$rep);
3411: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
3412: return @pairs;
3413: }
3414: my %returnhash=();
3415: my $i=0;
3416: foreach my $item (@$storearr) {
3417: $returnhash{$item}=&thaw_unescape($pairs[$i]);
3418: $i++;
3419: }
3420: return %returnhash;
3421: }
3422:
3423: # --------------------------------------------------------------- del interface
3424:
3425: sub del {
3426: my ($namespace,$storearr,$udomain,$uname)=@_;
3427: my $items='';
3428: foreach my $item (@$storearr) {
3429: $items.=&escape($item).'&';
3430: }
3431: $items=~s/\&$//;
3432: if (!$udomain) { $udomain=$env{'user.domain'}; }
3433: if (!$uname) { $uname=$env{'user.name'}; }
3434: my $uhome=&homeserver($uname,$udomain);
3435:
3436: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
3437: }
3438:
3439: # -------------------------------------------------------------- dump interface
3440:
3441: sub dump {
3442: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
3443: if (!$udomain) { $udomain=$env{'user.domain'}; }
3444: if (!$uname) { $uname=$env{'user.name'}; }
3445: my $uhome=&homeserver($uname,$udomain);
3446: if ($regexp) {
3447: $regexp=&escape($regexp);
3448: } else {
3449: $regexp='.';
3450: }
3451: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
3452: my @pairs=split(/\&/,$rep);
3453: my %returnhash=();
3454: foreach my $item (@pairs) {
3455: my ($key,$value)=split(/=/,$item,2);
3456: $key = &unescape($key);
3457: next if ($key =~ /^error: 2 /);
3458: $returnhash{$key}=&thaw_unescape($value);
3459: }
3460: return %returnhash;
3461: }
3462:
3463: # --------------------------------------------------------- dumpstore interface
3464:
3465: sub dumpstore {
3466: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
3467: if (!$udomain) { $udomain=$env{'user.domain'}; }
3468: if (!$uname) { $uname=$env{'user.name'}; }
3469: my $uhome=&homeserver($uname,$udomain);
3470: if ($regexp) {
3471: $regexp=&escape($regexp);
3472: } else {
3473: $regexp='.';
3474: }
3475: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
3476: my @pairs=split(/\&/,$rep);
3477: my %returnhash=();
3478: foreach my $item (@pairs) {
3479: my ($key,$value)=split(/=/,$item,2);
3480: next if ($key =~ /^error: 2 /);
3481: $returnhash{$key}=&thaw_unescape($value);
3482: }
3483: return %returnhash;
3484: }
3485:
3486: # -------------------------------------------------------------- keys interface
3487:
3488: sub getkeys {
3489: my ($namespace,$udomain,$uname)=@_;
3490: if (!$udomain) { $udomain=$env{'user.domain'}; }
3491: if (!$uname) { $uname=$env{'user.name'}; }
3492: my $uhome=&homeserver($uname,$udomain);
3493: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
3494: my @keyarray=();
3495: foreach my $key (split(/\&/,$rep)) {
3496: next if ($key =~ /^error: 2 /);
3497: push(@keyarray,&unescape($key));
3498: }
3499: return @keyarray;
3500: }
3501:
3502: # --------------------------------------------------------------- currentdump
3503: sub currentdump {
3504: my ($courseid,$sdom,$sname)=@_;
3505: $courseid = $env{'request.course.id'} if (! defined($courseid));
3506: $sdom = $env{'user.domain'} if (! defined($sdom));
3507: $sname = $env{'user.name'} if (! defined($sname));
3508: my $uhome = &homeserver($sname,$sdom);
3509: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
3510: return if ($rep =~ /^(error:|no_such_host)/);
3511: #
3512: my %returnhash=();
3513: #
3514: if ($rep eq "unknown_cmd") {
3515: # an old lond will not know currentdump
3516: # Do a dump and make it look like a currentdump
3517: my @tmp = &dumpstore($courseid,$sdom,$sname,'.');
3518: return if ($tmp[0] =~ /^(error:|no_such_host)/);
3519: my %hash = @tmp;
3520: @tmp=();
3521: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
3522: } else {
3523: my @pairs=split(/\&/,$rep);
3524: foreach my $pair (@pairs) {
3525: my ($key,$value)=split(/=/,$pair,2);
3526: my ($symb,$param) = split(/:/,$key);
3527: $returnhash{&unescape($symb)}->{&unescape($param)} =
3528: &thaw_unescape($value);
3529: }
3530: }
3531: return %returnhash;
3532: }
3533:
3534: sub convert_dump_to_currentdump{
3535: my %hash = %{shift()};
3536: my %returnhash;
3537: # Code ripped from lond, essentially. The only difference
3538: # here is the unescaping done by lonnet::dump(). Conceivably
3539: # we might run in to problems with parameter names =~ /^v\./
3540: while (my ($key,$value) = each(%hash)) {
3541: my ($v,$symb,$param) = split(/:/,$key);
3542: $symb = &unescape($symb);
3543: $param = &unescape($param);
3544: next if ($v eq 'version' || $symb eq 'keys');
3545: next if (exists($returnhash{$symb}) &&
3546: exists($returnhash{$symb}->{$param}) &&
3547: $returnhash{$symb}->{'v.'.$param} > $v);
3548: $returnhash{$symb}->{$param}=$value;
3549: $returnhash{$symb}->{'v.'.$param}=$v;
3550: }
3551: #
3552: # Remove all of the keys in the hashes which keep track of
3553: # the version of the parameter.
3554: while (my ($symb,$param_hash) = each(%returnhash)) {
3555: # use a foreach because we are going to delete from the hash.
3556: foreach my $key (keys(%$param_hash)) {
3557: delete($param_hash->{$key}) if ($key =~ /^v\./);
3558: }
3559: }
3560: return \%returnhash;
3561: }
3562:
3563: # ------------------------------------------------------ critical inc interface
3564:
3565: sub cinc {
3566: return &inc(@_,'critical');
3567: }
3568:
3569: # --------------------------------------------------------------- inc interface
3570:
3571: sub inc {
3572: my ($namespace,$store,$udomain,$uname,$critical) = @_;
3573: if (!$udomain) { $udomain=$env{'user.domain'}; }
3574: if (!$uname) { $uname=$env{'user.name'}; }
3575: my $uhome=&homeserver($uname,$udomain);
3576: my $items='';
3577: if (! ref($store)) {
3578: # got a single value, so use that instead
3579: $items = &escape($store).'=&';
3580: } elsif (ref($store) eq 'SCALAR') {
3581: $items = &escape($$store).'=&';
3582: } elsif (ref($store) eq 'ARRAY') {
3583: $items = join('=&',map {&escape($_);} @{$store});
3584: } elsif (ref($store) eq 'HASH') {
3585: while (my($key,$value) = each(%{$store})) {
3586: $items.= &escape($key).'='.&escape($value).'&';
3587: }
3588: }
3589: $items=~s/\&$//;
3590: if ($critical) {
3591: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
3592: } else {
3593: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
3594: }
3595: }
3596:
3597: # --------------------------------------------------------------- put interface
3598:
3599: sub put {
3600: my ($namespace,$storehash,$udomain,$uname)=@_;
3601: if (!$udomain) { $udomain=$env{'user.domain'}; }
3602: if (!$uname) { $uname=$env{'user.name'}; }
3603: my $uhome=&homeserver($uname,$udomain);
3604: my $items='';
3605: foreach my $item (keys(%$storehash)) {
3606: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3607: }
3608: $items=~s/\&$//;
3609: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3610: }
3611:
3612: # ------------------------------------------------------------ newput interface
3613:
3614: sub newput {
3615: my ($namespace,$storehash,$udomain,$uname)=@_;
3616: if (!$udomain) { $udomain=$env{'user.domain'}; }
3617: if (!$uname) { $uname=$env{'user.name'}; }
3618: my $uhome=&homeserver($uname,$udomain);
3619: my $items='';
3620: foreach my $key (keys(%$storehash)) {
3621: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3622: }
3623: $items=~s/\&$//;
3624: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
3625: }
3626:
3627: # --------------------------------------------------------- putstore interface
3628:
3629: sub putstore {
3630: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3631: if (!$udomain) { $udomain=$env{'user.domain'}; }
3632: if (!$uname) { $uname=$env{'user.name'}; }
3633: my $uhome=&homeserver($uname,$udomain);
3634: my $items='';
3635: foreach my $key (keys(%$storehash)) {
3636: $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
3637: }
3638: $items=~s/\&$//;
3639: my $esc_symb=&escape($symb);
3640: my $esc_v=&escape($version);
3641: my $reply =
3642: &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
3643: $uhome);
3644: if ($reply eq 'unknown_cmd') {
3645: # gfall back to way things use to be done
3646: return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
3647: $uname);
3648: }
3649: return $reply;
3650: }
3651:
3652: sub old_putstore {
3653: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3654: if (!$udomain) { $udomain=$env{'user.domain'}; }
3655: if (!$uname) { $uname=$env{'user.name'}; }
3656: my $uhome=&homeserver($uname,$udomain);
3657: my %newstorehash;
3658: foreach my $item (keys(%$storehash)) {
3659: my $key = $version.':'.&escape($symb).':'.$item;
3660: $newstorehash{$key} = $storehash->{$item};
3661: }
3662: my $items='';
3663: my %allitems = ();
3664: foreach my $item (keys(%newstorehash)) {
3665: if ($item =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
3666: my $key = $1.':keys:'.$2;
3667: $allitems{$key} .= $3.':';
3668: }
3669: $items.=$item.'='.&freeze_escape($newstorehash{$item}).'&';
3670: }
3671: foreach my $item (keys(%allitems)) {
3672: $allitems{$item} =~ s/\:$//;
3673: $items.= $item.'='.$allitems{$item}.'&';
3674: }
3675: $items=~s/\&$//;
3676: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3677: }
3678:
3679: # ------------------------------------------------------ critical put interface
3680:
3681: sub cput {
3682: my ($namespace,$storehash,$udomain,$uname)=@_;
3683: if (!$udomain) { $udomain=$env{'user.domain'}; }
3684: if (!$uname) { $uname=$env{'user.name'}; }
3685: my $uhome=&homeserver($uname,$udomain);
3686: my $items='';
3687: foreach my $item (keys(%$storehash)) {
3688: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3689: }
3690: $items=~s/\&$//;
3691: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
3692: }
3693:
3694: # -------------------------------------------------------------- eget interface
3695:
3696: sub eget {
3697: my ($namespace,$storearr,$udomain,$uname)=@_;
3698: my $items='';
3699: foreach my $item (@$storearr) {
3700: $items.=&escape($item).'&';
3701: }
3702: $items=~s/\&$//;
3703: if (!$udomain) { $udomain=$env{'user.domain'}; }
3704: if (!$uname) { $uname=$env{'user.name'}; }
3705: my $uhome=&homeserver($uname,$udomain);
3706: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3707: my @pairs=split(/\&/,$rep);
3708: my %returnhash=();
3709: my $i=0;
3710: foreach my $item (@$storearr) {
3711: $returnhash{$item}=&thaw_unescape($pairs[$i]);
3712: $i++;
3713: }
3714: return %returnhash;
3715: }
3716:
3717: # ------------------------------------------------------------ tmpput interface
3718: sub tmpput {
3719: my ($storehash,$server,$context)=@_;
3720: my $items='';
3721: foreach my $item (keys(%$storehash)) {
3722: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3723: }
3724: $items=~s/\&$//;
3725: if (defined($context)) {
3726: $items .= ':'.&escape($context);
3727: }
3728: return &reply("tmpput:$items",$server);
3729: }
3730:
3731: # ------------------------------------------------------------ tmpget interface
3732: sub tmpget {
3733: my ($token,$server)=@_;
3734: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3735: my $rep=&reply("tmpget:$token",$server);
3736: my %returnhash;
3737: foreach my $item (split(/\&/,$rep)) {
3738: my ($key,$value)=split(/=/,$item);
3739: $returnhash{&unescape($key)}=&thaw_unescape($value);
3740: }
3741: return %returnhash;
3742: }
3743:
3744: # ------------------------------------------------------------ tmpget interface
3745: sub tmpdel {
3746: my ($token,$server)=@_;
3747: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3748: return &reply("tmpdel:$token",$server);
3749: }
3750:
3751: # -------------------------------------------------- portfolio access checking
3752:
3753: sub portfolio_access {
3754: my ($requrl) = @_;
3755: my (undef,$udom,$unum,$file_name,$group) = &parse_portfolio_url($requrl);
3756: my $result = &get_portfolio_access($udom,$unum,$file_name,$group);
3757: if ($result) {
3758: my %setters;
3759: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3760: my ($startblock,$endblock) =
3761: &Apache::loncommon::blockcheck(\%setters,'port',$unum,$udom);
3762: if ($startblock && $endblock) {
3763: return 'B';
3764: }
3765: } else {
3766: my ($startblock,$endblock) =
3767: &Apache::loncommon::blockcheck(\%setters,'port');
3768: if ($startblock && $endblock) {
3769: return 'B';
3770: }
3771: }
3772: }
3773: if ($result eq 'ok') {
3774: return 'F';
3775: } elsif ($result =~ /^[^:]+:guest_/) {
3776: return 'A';
3777: }
3778: return '';
3779: }
3780:
3781: sub get_portfolio_access {
3782: my ($udom,$unum,$file_name,$group,$access_hash) = @_;
3783:
3784: if (!ref($access_hash)) {
3785: my $current_perms = &get_portfile_permissions($udom,$unum);
3786: my %access_controls = &get_access_controls($current_perms,$group,
3787: $file_name);
3788: $access_hash = $access_controls{$file_name};
3789: }
3790:
3791: my ($public,$guest,@domains,@users,@courses,@groups);
3792: my $now = time;
3793: if (ref($access_hash) eq 'HASH') {
3794: foreach my $key (keys(%{$access_hash})) {
3795: my ($num,$scope,$end,$start) = ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
3796: if ($start > $now) {
3797: next;
3798: }
3799: if ($end && $end<$now) {
3800: next;
3801: }
3802: if ($scope eq 'public') {
3803: $public = $key;
3804: last;
3805: } elsif ($scope eq 'guest') {
3806: $guest = $key;
3807: } elsif ($scope eq 'domains') {
3808: push(@domains,$key);
3809: } elsif ($scope eq 'users') {
3810: push(@users,$key);
3811: } elsif ($scope eq 'course') {
3812: push(@courses,$key);
3813: } elsif ($scope eq 'group') {
3814: push(@groups,$key);
3815: }
3816: }
3817: if ($public) {
3818: return 'ok';
3819: }
3820: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3821: if ($guest) {
3822: return $guest;
3823: }
3824: } else {
3825: if (@domains > 0) {
3826: foreach my $domkey (@domains) {
3827: if (ref($access_hash->{$domkey}{'dom'}) eq 'ARRAY') {
3828: if (grep(/^\Q$env{'user.domain'}\E$/,@{$access_hash->{$domkey}{'dom'}})) {
3829: return 'ok';
3830: }
3831: }
3832: }
3833: }
3834: if (@users > 0) {
3835: foreach my $userkey (@users) {
3836: if (ref($access_hash->{$userkey}{'users'}) eq 'ARRAY') {
3837: foreach my $item (@{$access_hash->{$userkey}{'users'}}) {
3838: if (ref($item) eq 'HASH') {
3839: if (($item->{'uname'} eq $env{'user.name'}) &&
3840: ($item->{'udom'} eq $env{'user.domain'})) {
3841: return 'ok';
3842: }
3843: }
3844: }
3845: }
3846: }
3847: }
3848: my %roleshash;
3849: my @courses_and_groups = @courses;
3850: push(@courses_and_groups,@groups);
3851: if (@courses_and_groups > 0) {
3852: my (%allgroups,%allroles);
3853: my ($start,$end,$role,$sec,$group);
3854: foreach my $envkey (%env) {
3855: if ($envkey =~ m-^user\.role\.(gr|cc|in|ta|ep|st)\./($match_domain)/($match_courseid)/?([^/]*)$-) {
3856: my $cid = $2.'_'.$3;
3857: if ($1 eq 'gr') {
3858: $group = $4;
3859: $allgroups{$cid}{$group} = $env{$envkey};
3860: } else {
3861: if ($4 eq '') {
3862: $sec = 'none';
3863: } else {
3864: $sec = $4;
3865: }
3866: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3867: }
3868: } elsif ($envkey =~ m-^user\.role\./cr/($match_domain/$match_username/\w*)./($match_domain)/($match_courseid)/?([^/]*)$-) {
3869: my $cid = $2.'_'.$3;
3870: if ($4 eq '') {
3871: $sec = 'none';
3872: } else {
3873: $sec = $4;
3874: }
3875: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3876: }
3877: }
3878: if (keys(%allroles) == 0) {
3879: return;
3880: }
3881: foreach my $key (@courses_and_groups) {
3882: my %content = %{$$access_hash{$key}};
3883: my $cnum = $content{'number'};
3884: my $cdom = $content{'domain'};
3885: my $cid = $cdom.'_'.$cnum;
3886: if (!exists($allroles{$cid})) {
3887: next;
3888: }
3889: foreach my $role_id (keys(%{$content{'roles'}})) {
3890: my @sections = @{$content{'roles'}{$role_id}{'section'}};
3891: my @groups = @{$content{'roles'}{$role_id}{'group'}};
3892: my @status = @{$content{'roles'}{$role_id}{'access'}};
3893: my @roles = @{$content{'roles'}{$role_id}{'role'}};
3894: foreach my $role (keys(%{$allroles{$cid}})) {
3895: if ((grep/^all$/,@roles) || (grep/^\Q$role\E$/,@roles)) {
3896: foreach my $sec (keys(%{$allroles{$cid}{$role}})) {
3897: if (&course_group_datechecker($allroles{$cid}{$role}{$sec},$now,\@status) eq 'ok') {
3898: if (grep/^all$/,@sections) {
3899: return 'ok';
3900: } else {
3901: if (grep/^$sec$/,@sections) {
3902: return 'ok';
3903: }
3904: }
3905: }
3906: }
3907: if (keys(%{$allgroups{$cid}}) == 0) {
3908: if (grep/^none$/,@groups) {
3909: return 'ok';
3910: }
3911: } else {
3912: if (grep/^all$/,@groups) {
3913: return 'ok';
3914: }
3915: foreach my $group (keys(%{$allgroups{$cid}})) {
3916: if (grep/^$group$/,@groups) {
3917: return 'ok';
3918: }
3919: }
3920: }
3921: }
3922: }
3923: }
3924: }
3925: }
3926: if ($guest) {
3927: return $guest;
3928: }
3929: }
3930: }
3931: return;
3932: }
3933:
3934: sub course_group_datechecker {
3935: my ($dates,$now,$status) = @_;
3936: my ($start,$end) = split(/\./,$dates);
3937: if (!$start && !$end) {
3938: return 'ok';
3939: }
3940: if (grep/^active$/,@{$status}) {
3941: if (((!$start) || ($start && $start <= $now)) && ((!$end) || ($end && $end >= $now))) {
3942: return 'ok';
3943: }
3944: }
3945: if (grep/^previous$/,@{$status}) {
3946: if ($end > $now ) {
3947: return 'ok';
3948: }
3949: }
3950: if (grep/^future$/,@{$status}) {
3951: if ($start > $now) {
3952: return 'ok';
3953: }
3954: }
3955: return;
3956: }
3957:
3958: sub parse_portfolio_url {
3959: my ($url) = @_;
3960:
3961: my ($type,$udom,$unum,$group,$file_name);
3962:
3963: if ($url =~ m-^/*(?:uploaded|editupload)/($match_domain)/($match_username)/portfolio(/.+)$-) {
3964: $type = 1;
3965: $udom = $1;
3966: $unum = $2;
3967: $file_name = $3;
3968: } elsif ($url =~ m-^/*(?:uploaded|editupload)/($match_domain)/($match_courseid)/groups/([^/]+)/portfolio/(.+)$-) {
3969: $type = 2;
3970: $udom = $1;
3971: $unum = $2;
3972: $group = $3;
3973: $file_name = $3.'/'.$4;
3974: }
3975: if (wantarray) {
3976: return ($type,$udom,$unum,$file_name,$group);
3977: }
3978: return $type;
3979: }
3980:
3981: sub is_portfolio_url {
3982: my ($url) = @_;
3983: return scalar(&parse_portfolio_url($url));
3984: }
3985:
3986: sub is_portfolio_file {
3987: my ($file) = @_;
3988: if (($file =~ /^portfolio/) || ($file =~ /^groups\/\w+\/portfolio/)) {
3989: return 1;
3990: }
3991: return;
3992: }
3993:
3994:
3995: # ---------------------------------------------- Custom access rule evaluation
3996:
3997: sub customaccess {
3998: my ($priv,$uri)=@_;
3999: my ($urole,$urealm)=split(/\./,$env{'request.role'},2);
4000: my (undef,$udom,$ucrs,$usec)=split(/\//,$urealm);
4001: $udom = &LONCAPA::clean_domain($udom);
4002: $ucrs = &LONCAPA::clean_username($ucrs);
4003: my $access=0;
4004: foreach my $right (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
4005: my ($effect,$realm,$role,$type)=split(/\:/,$right);
4006: if ($type eq 'user') {
4007: foreach my $scope (split(/\s*\,\s*/,$realm)) {
4008: my ($tdom,$tuname)=split(m{/},$scope);
4009: if ($tdom) {
4010: if ($tdom ne $env{'user.domain'}) { next; }
4011: }
4012: if ($tuname) {
4013: if ($tuname ne $env{'user.name'}) { next; }
4014: }
4015: $access=($effect eq 'allow');
4016: last;
4017: }
4018: } else {
4019: if ($role) {
4020: if ($role ne $urole) { next; }
4021: }
4022: foreach my $scope (split(/\s*\,\s*/,$realm)) {
4023: my ($tdom,$tcrs,$tsec)=split(/\_/,$scope);
4024: if ($tdom) {
4025: if ($tdom ne $udom) { next; }
4026: }
4027: if ($tcrs) {
4028: if ($tcrs ne $ucrs) { next; }
4029: }
4030: if ($tsec) {
4031: if ($tsec ne $usec) { next; }
4032: }
4033: $access=($effect eq 'allow');
4034: last;
4035: }
4036: if ($realm eq '' && $role eq '') {
4037: $access=($effect eq 'allow');
4038: }
4039: }
4040: }
4041: return $access;
4042: }
4043:
4044: # ------------------------------------------------- Check for a user privilege
4045:
4046: sub allowed {
4047: my ($priv,$uri,$symb,$role)=@_;
4048: my $ver_orguri=$uri;
4049: $uri=&deversion($uri);
4050: my $orguri=$uri;
4051: $uri=&declutter($uri);
4052:
4053: if ($priv eq 'evb') {
4054: # Evade communication block restrictions for specified role in a course
4055: if ($env{'user.priv.'.$role} =~/evb\&([^\:]*)/) {
4056: return $1;
4057: } else {
4058: return;
4059: }
4060: }
4061:
4062: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
4063: # Free bre access to adm and meta resources
4064: if (((($uri=~/^adm\//) && ($uri !~ m{/(?:smppg|bulletinboard)$}))
4065: || (($uri=~/\.meta$/) && ($uri!~m|^uploaded/|) ))
4066: && ($priv eq 'bre')) {
4067: return 'F';
4068: }
4069:
4070: # Free bre access to user's own portfolio contents
4071: my ($space,$domain,$name,@dir)=split('/',$uri);
4072: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
4073: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
4074: my %setters;
4075: my ($startblock,$endblock) =
4076: &Apache::loncommon::blockcheck(\%setters,'port');
4077: if ($startblock && $endblock) {
4078: return 'B';
4079: } else {
4080: return 'F';
4081: }
4082: }
4083:
4084: # bre access to group portfolio for rgf priv in group, or mdg or vcg in course.
4085: if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
4086: && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
4087: if (exists($env{'request.course.id'})) {
4088: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
4089: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
4090: if (($domain eq $cdom) && ($name eq $cnum)) {
4091: my $courseprivid=$env{'request.course.id'};
4092: $courseprivid=~s/\_/\//;
4093: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
4094: .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
4095: return $1;
4096: } else {
4097: if ($env{'request.course.sec'}) {
4098: $courseprivid.='/'.$env{'request.course.sec'};
4099: }
4100: if ($env{'user.priv.'.$env{'request.role'}.'./'.
4101: $courseprivid} =~/(mdg|vcg)\&([^\:]*)/) {
4102: return $2;
4103: }
4104: }
4105: }
4106: }
4107: }
4108:
4109: # Free bre to public access
4110:
4111: if ($priv eq 'bre') {
4112: my $copyright=&metadata($uri,'copyright');
4113: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
4114: return 'F';
4115: }
4116: if ($copyright eq 'priv') {
4117: $uri=~/([^\/]+)\/([^\/]+)\//;
4118: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
4119: return '';
4120: }
4121: }
4122: if ($copyright eq 'domain') {
4123: $uri=~/([^\/]+)\/([^\/]+)\//;
4124: unless (($env{'user.domain'} eq $1) ||
4125: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
4126: return '';
4127: }
4128: }
4129: if ($env{'request.role'}=~ /li\.\//) {
4130: # Library role, so allow browsing of resources in this domain.
4131: return 'F';
4132: }
4133: if ($copyright eq 'custom') {
4134: unless (&customaccess($priv,$uri)) { return ''; }
4135: }
4136: }
4137: # Domain coordinator is trying to create a course
4138: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
4139: # uri is the requested domain in this case.
4140: # comparison to 'request.role.domain' shows if the user has selected
4141: # a role of dc for the domain in question.
4142: return 'F' if ($uri eq $env{'request.role.domain'});
4143: }
4144:
4145: my $thisallowed='';
4146: my $statecond=0;
4147: my $courseprivid='';
4148:
4149: # Course
4150:
4151: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
4152: $thisallowed.=$1;
4153: }
4154:
4155: # Domain
4156:
4157: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
4158: =~/\Q$priv\E\&([^\:]*)/) {
4159: $thisallowed.=$1;
4160: }
4161:
4162: # Course: uri itself is a course
4163: my $courseuri=$uri;
4164: $courseuri=~s/\_(\d)/\/$1/;
4165: $courseuri=~s/^([^\/])/\/$1/;
4166:
4167: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
4168: =~/\Q$priv\E\&([^\:]*)/) {
4169: $thisallowed.=$1;
4170: }
4171:
4172: # URI is an uploaded document for this course, default permissions don't matter
4173: # not allowing 'edit' access (editupload) to uploaded course docs
4174: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
4175: $thisallowed='';
4176: my ($match)=&is_on_map($uri);
4177: if ($match) {
4178: if ($env{'user.priv.'.$env{'request.role'}.'./'}
4179: =~/\Q$priv\E\&([^\:]*)/) {
4180: $thisallowed.=$1;
4181: }
4182: } else {
4183: my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
4184: if ($refuri) {
4185: if ($refuri =~ m|^/adm/|) {
4186: $thisallowed='F';
4187: } else {
4188: $refuri=&declutter($refuri);
4189: my ($match) = &is_on_map($refuri);
4190: if ($match) {
4191: $thisallowed='F';
4192: }
4193: }
4194: }
4195: }
4196: }
4197:
4198: if ($priv eq 'bre'
4199: && $thisallowed ne 'F'
4200: && $thisallowed ne '2'
4201: && &is_portfolio_url($uri)) {
4202: $thisallowed = &portfolio_access($uri);
4203: }
4204:
4205: # Full access at system, domain or course-wide level? Exit.
4206:
4207: if ($thisallowed=~/F/) {
4208: return 'F';
4209: }
4210:
4211: # If this is generating or modifying users, exit with special codes
4212:
4213: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
4214: if (($priv eq 'cca') || ($priv eq 'caa')) {
4215: my ($audom,$auname)=split('/',$uri);
4216: # no author name given, so this just checks on the general right to make a co-author in this domain
4217: unless ($auname) { return $thisallowed; }
4218: # an author name is given, so we are about to actually make a co-author for a certain account
4219: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
4220: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
4221: ($audom ne $env{'request.role.domain'}))) { return ''; }
4222: }
4223: return $thisallowed;
4224: }
4225: #
4226: # Gathered so far: system, domain and course wide privileges
4227: #
4228: # Course: See if uri or referer is an individual resource that is part of
4229: # the course
4230:
4231: if ($env{'request.course.id'}) {
4232:
4233: $courseprivid=$env{'request.course.id'};
4234: if ($env{'request.course.sec'}) {
4235: $courseprivid.='/'.$env{'request.course.sec'};
4236: }
4237: $courseprivid=~s/\_/\//;
4238: my $checkreferer=1;
4239: my ($match,$cond)=&is_on_map($uri);
4240: if ($match) {
4241: $statecond=$cond;
4242: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
4243: =~/\Q$priv\E\&([^\:]*)/) {
4244: $thisallowed.=$1;
4245: $checkreferer=0;
4246: }
4247: }
4248:
4249: if ($checkreferer) {
4250: my $refuri=$env{'httpref.'.$orguri};
4251: unless ($refuri) {
4252: foreach my $key (keys(%env)) {
4253: if ($key=~/^httpref\..*\*/) {
4254: my $pattern=$key;
4255: $pattern=~s/^httpref\.\/res\///;
4256: $pattern=~s/\*/\[\^\/\]\+/g;
4257: $pattern=~s/\//\\\//g;
4258: if ($orguri=~/$pattern/) {
4259: $refuri=$env{$key};
4260: }
4261: }
4262: }
4263: }
4264:
4265: if ($refuri) {
4266: $refuri=&declutter($refuri);
4267: my ($match,$cond)=&is_on_map($refuri);
4268: if ($match) {
4269: my $refstatecond=$cond;
4270: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
4271: =~/\Q$priv\E\&([^\:]*)/) {
4272: $thisallowed.=$1;
4273: $uri=$refuri;
4274: $statecond=$refstatecond;
4275: }
4276: }
4277: }
4278: }
4279: }
4280:
4281: #
4282: # Gathered now: all privileges that could apply, and condition number
4283: #
4284: #
4285: # Full or no access?
4286: #
4287:
4288: if ($thisallowed=~/F/) {
4289: return 'F';
4290: }
4291:
4292: unless ($thisallowed) {
4293: return '';
4294: }
4295:
4296: # Restrictions exist, deal with them
4297: #
4298: # C:according to course preferences
4299: # R:according to resource settings
4300: # L:unless locked
4301: # X:according to user session state
4302: #
4303:
4304: # Possibly locked functionality, check all courses
4305: # Locks might take effect only after 10 minutes cache expiration for other
4306: # courses, and 2 minutes for current course
4307:
4308: my $envkey;
4309: if ($thisallowed=~/L/) {
4310: foreach $envkey (keys %env) {
4311: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
4312: my $courseid=$2;
4313: my $roleid=$1.'.'.$2;
4314: $courseid=~s/^\///;
4315: my $expiretime=600;
4316: if ($env{'request.role'} eq $roleid) {
4317: $expiretime=120;
4318: }
4319: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
4320: my $prefix='course.'.$cdom.'_'.$cnum.'.';
4321: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
4322: &coursedescription($courseid,{'freshen_cache' => 1});
4323: }
4324: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
4325: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
4326: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
4327: &log($env{'user.domain'},$env{'user.name'},
4328: $env{'user.home'},
4329: 'Locked by res: '.$priv.' for '.$uri.' due to '.
4330: $cdom.'/'.$cnum.'/'.$csec.' expire '.
4331: $env{$prefix.'priv.'.$priv.'.lock.expire'});
4332: return '';
4333: }
4334: }
4335: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
4336: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
4337: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
4338: &log($env{'user.domain'},$env{'user.name'},
4339: $env{'user.home'},
4340: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
4341: $cdom.'/'.$cnum.'/'.$csec.' expire '.
4342: $env{$prefix.'priv.'.$priv.'.lock.expire'});
4343: return '';
4344: }
4345: }
4346: }
4347: }
4348: }
4349:
4350: #
4351: # Rest of the restrictions depend on selected course
4352: #
4353:
4354: unless ($env{'request.course.id'}) {
4355: if ($thisallowed eq 'A') {
4356: return 'A';
4357: } elsif ($thisallowed eq 'B') {
4358: return 'B';
4359: } else {
4360: return '1';
4361: }
4362: }
4363:
4364: #
4365: # Now user is definitely in a course
4366: #
4367:
4368:
4369: # Course preferences
4370:
4371: if ($thisallowed=~/C/) {
4372: my $rolecode=(split(/\./,$env{'request.role'}))[0];
4373: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
4374: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
4375: =~/\Q$rolecode\E/) {
4376: if ($priv ne 'pch') {
4377: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
4378: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
4379: $env{'request.course.id'});
4380: }
4381: return '';
4382: }
4383:
4384: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
4385: =~/\Q$unamedom\E/) {
4386: if ($priv ne 'pch') {
4387: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
4388: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
4389: $env{'request.course.id'});
4390: }
4391: return '';
4392: }
4393: }
4394:
4395: # Resource preferences
4396:
4397: if ($thisallowed=~/R/) {
4398: my $rolecode=(split(/\./,$env{'request.role'}))[0];
4399: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
4400: if ($priv ne 'pch') {
4401: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
4402: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
4403: }
4404: return '';
4405: }
4406: }
4407:
4408: # Restricted by state or randomout?
4409:
4410: if ($thisallowed=~/X/) {
4411: if ($env{'acc.randomout'}) {
4412: if (!$symb) { $symb=&symbread($uri,1); }
4413: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
4414: return '';
4415: }
4416: }
4417: if (&condval($statecond)) {
4418: return '2';
4419: } else {
4420: return '';
4421: }
4422: }
4423:
4424: if ($thisallowed eq 'A') {
4425: return 'A';
4426: } elsif ($thisallowed eq 'B') {
4427: return 'B';
4428: }
4429: return 'F';
4430: }
4431:
4432: sub split_uri_for_cond {
4433: my $uri=&deversion(&declutter(shift));
4434: my @uriparts=split(/\//,$uri);
4435: my $filename=pop(@uriparts);
4436: my $pathname=join('/',@uriparts);
4437: return ($pathname,$filename);
4438: }
4439: # --------------------------------------------------- Is a resource on the map?
4440:
4441: sub is_on_map {
4442: my ($pathname,$filename) = &split_uri_for_cond(shift);
4443: #Trying to find the conditional for the file
4444: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
4445: /\&\Q$filename\E\:([\d\|]+)\&/);
4446: if ($match) {
4447: return (1,$1);
4448: } else {
4449: return (0,0);
4450: }
4451: }
4452:
4453: # --------------------------------------------------------- Get symb from alias
4454:
4455: sub get_symb_from_alias {
4456: my $symb=shift;
4457: my ($map,$resid,$url)=&decode_symb($symb);
4458: # Already is a symb
4459: if ($url) { return $symb; }
4460: # Must be an alias
4461: my $aliassymb='';
4462: my %bighash;
4463: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4464: &GDBM_READER(),0640)) {
4465: my $rid=$bighash{'mapalias_'.$symb};
4466: if ($rid) {
4467: my ($mapid,$resid)=split(/\./,$rid);
4468: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
4469: $resid,$bighash{'src_'.$rid});
4470: }
4471: untie %bighash;
4472: }
4473: return $aliassymb;
4474: }
4475:
4476: # ----------------------------------------------------------------- Define Role
4477:
4478: sub definerole {
4479: if (allowed('mcr','/')) {
4480: my ($rolename,$sysrole,$domrole,$courole)=@_;
4481: foreach my $role (split(':',$sysrole)) {
4482: my ($crole,$cqual)=split(/\&/,$role);
4483: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
4484: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
4485: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
4486: return "refused:s:$crole&$cqual";
4487: }
4488: }
4489: }
4490: foreach my $role (split(':',$domrole)) {
4491: my ($crole,$cqual)=split(/\&/,$role);
4492: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
4493: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
4494: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
4495: return "refused:d:$crole&$cqual";
4496: }
4497: }
4498: }
4499: foreach my $role (split(':',$courole)) {
4500: my ($crole,$cqual)=split(/\&/,$role);
4501: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
4502: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
4503: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
4504: return "refused:c:$crole&$cqual";
4505: }
4506: }
4507: }
4508: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4509: "$env{'user.domain'}:$env{'user.name'}:".
4510: "rolesdef_$rolename=".
4511: escape($sysrole.'_'.$domrole.'_'.$courole);
4512: return reply($command,$env{'user.home'});
4513: } else {
4514: return 'refused';
4515: }
4516: }
4517:
4518: # ---------------- Make a metadata query against the network of library servers
4519:
4520: sub metadata_query {
4521: my ($query,$custom,$customshow,$server_array)=@_;
4522: my %rhash;
4523: my %libserv = &all_library();
4524: my @server_list = (defined($server_array) ? @$server_array
4525: : keys(%libserv) );
4526: for my $server (@server_list) {
4527: unless ($custom or $customshow) {
4528: my $reply=&reply("querysend:".&escape($query),$server);
4529: $rhash{$server}=$reply;
4530: }
4531: else {
4532: my $reply=&reply("querysend:".&escape($query).':'.
4533: &escape($custom).':'.&escape($customshow),
4534: $server);
4535: $rhash{$server}=$reply;
4536: }
4537: }
4538: return \%rhash;
4539: }
4540:
4541: # ----------------------------------------- Send log queries and wait for reply
4542:
4543: sub log_query {
4544: my ($uname,$udom,$query,%filters)=@_;
4545: my $uhome=&homeserver($uname,$udom);
4546: if ($uhome eq 'no_host') { return 'error: no_host'; }
4547: my $uhost=&hostname($uhome);
4548: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys(%filters)));
4549: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
4550: $uhome);
4551: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
4552: return get_query_reply($queryid);
4553: }
4554:
4555: # -------------------------- Update MySQL table for portfolio file
4556:
4557: sub update_portfolio_table {
4558: my ($uname,$udom,$file_name,$query,$group,$action) = @_;
4559: my $homeserver = &homeserver($uname,$udom);
4560: my $queryid=
4561: &reply("querysend:".$query.':'.&escape($uname.':'.$udom.':'.$group).
4562: ':'.&escape($file_name).':'.$action,$homeserver);
4563: my $reply = &get_query_reply($queryid);
4564: return $reply;
4565: }
4566:
4567: # -------------------------- Update MySQL allusers table
4568:
4569: sub update_allusers_table {
4570: my ($uname,$udom,$names) = @_;
4571: my $homeserver = &homeserver($uname,$udom);
4572: my $queryid=
4573: &reply('querysend:allusers:'.&escape($uname).':'.&escape($udom).':'.
4574: 'lastname='.&escape($names->{'lastname'}).'%%'.
4575: 'firstname='.&escape($names->{'firstname'}).'%%'.
4576: 'middlename='.&escape($names->{'middlename'}).'%%'.
4577: 'generation='.&escape($names->{'generation'}).'%%'.
4578: 'permanentemail='.&escape($names->{'permanentemail'}).'%%'.
4579: 'id='.&escape($names->{'id'}),$homeserver);
4580: my $reply = &get_query_reply($queryid);
4581: return $reply;
4582: }
4583:
4584: # ------- Request retrieval of institutional classlists for course(s)
4585:
4586: sub fetch_enrollment_query {
4587: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
4588: my $homeserver;
4589: my $maxtries = 1;
4590: if ($context eq 'automated') {
4591: $homeserver = $perlvar{'lonHostID'};
4592: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
4593: } else {
4594: $homeserver = &homeserver($cnum,$dom);
4595: }
4596: my $host=&hostname($homeserver);
4597: my $cmd = '';
4598: foreach my $affiliate (keys %{$affiliatesref}) {
4599: $cmd .= $affiliate.'='.join(",",@{$$affiliatesref{$affiliate}}).'%%';
4600: }
4601: $cmd =~ s/%%$//;
4602: $cmd = &escape($cmd);
4603: my $query = 'fetchenrollment';
4604: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
4605: unless ($queryid=~/^\Q$host\E\_/) {
4606: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
4607: return 'error: '.$queryid;
4608: }
4609: my $reply = &get_query_reply($queryid);
4610: my $tries = 1;
4611: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4612: $reply = &get_query_reply($queryid);
4613: $tries ++;
4614: }
4615: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4616: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4617: } else {
4618: my @responses = split(/:/,$reply);
4619: if ($homeserver eq $perlvar{'lonHostID'}) {
4620: foreach my $line (@responses) {
4621: my ($key,$value) = split(/=/,$line,2);
4622: $$replyref{$key} = $value;
4623: }
4624: } else {
4625: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
4626: foreach my $line (@responses) {
4627: my ($key,$value) = split(/=/,$line);
4628: $$replyref{$key} = $value;
4629: if ($value > 0) {
4630: foreach my $item (@{$$affiliatesref{$key}}) {
4631: my $filename = $dom.'_'.$key.'_'.$item.'_classlist.xml';
4632: my $destname = $pathname.'/'.$filename;
4633: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
4634: if ($xml_classlist =~ /^error/) {
4635: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
4636: } else {
4637: if ( open(FILE,">$destname") ) {
4638: print FILE &unescape($xml_classlist);
4639: close(FILE);
4640: } else {
4641: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
4642: }
4643: }
4644: }
4645: }
4646: }
4647: }
4648: return 'ok';
4649: }
4650: return 'error';
4651: }
4652:
4653: sub get_query_reply {
4654: my $queryid=shift;
4655: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
4656: my $reply='';
4657: for (1..100) {
4658: sleep 2;
4659: if (-e $replyfile.'.end') {
4660: if (open(my $fh,$replyfile)) {
4661: $reply = join('',<$fh>);
4662: close($fh);
4663: } else { return 'error: reply_file_error'; }
4664: return &unescape($reply);
4665: }
4666: }
4667: return 'timeout:'.$queryid;
4668: }
4669:
4670: sub courselog_query {
4671: #
4672: # possible filters:
4673: # url: url or symb
4674: # username
4675: # domain
4676: # action: view, submit, grade
4677: # start: timestamp
4678: # end: timestamp
4679: #
4680: my (%filters)=@_;
4681: unless ($env{'request.course.id'}) { return 'no_course'; }
4682: if ($filters{'url'}) {
4683: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
4684: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
4685: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
4686: }
4687: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
4688: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
4689: return &log_query($cname,$cdom,'courselog',%filters);
4690: }
4691:
4692: sub userlog_query {
4693: #
4694: # possible filters:
4695: # action: log check role
4696: # start: timestamp
4697: # end: timestamp
4698: #
4699: my ($uname,$udom,%filters)=@_;
4700: return &log_query($uname,$udom,'userlog',%filters);
4701: }
4702:
4703: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
4704:
4705: sub auto_run {
4706: my ($cnum,$cdom) = @_;
4707: my $response = 0;
4708: my $settings;
4709: my %domconfig = &get_dom('configuration',['autoenroll'],$cdom);
4710: if (ref($domconfig{'autoenroll'}) eq 'HASH') {
4711: $settings = $domconfig{'autoenroll'};
4712: if ($settings->{'run'} eq '1') {
4713: $response = 1;
4714: }
4715: } else {
4716: my $homeserver = &homeserver($cnum,$cdom);
4717: $response = &reply('autorun:'.$cdom,$homeserver);
4718: }
4719: return $response;
4720: }
4721:
4722: sub auto_get_sections {
4723: my ($cnum,$cdom,$inst_coursecode) = @_;
4724: my $homeserver = &homeserver($cnum,$cdom);
4725: my @secs = ();
4726: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
4727: unless ($response eq 'refused') {
4728: @secs = split(/:/,$response);
4729: }
4730: return @secs;
4731: }
4732:
4733: sub auto_new_course {
4734: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
4735: my $homeserver = &homeserver($cnum,$cdom);
4736: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
4737: return $response;
4738: }
4739:
4740: sub auto_validate_courseID {
4741: my ($cnum,$cdom,$inst_course_id) = @_;
4742: my $homeserver = &homeserver($cnum,$cdom);
4743: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
4744: return $response;
4745: }
4746:
4747: sub auto_create_password {
4748: my ($cnum,$cdom,$authparam,$udom) = @_;
4749: my ($homeserver,$response);
4750: my $create_passwd = 0;
4751: my $authchk = '';
4752: if ($udom =~ /^$match_domain$/) {
4753: $homeserver = &domain($udom,'primary');
4754: }
4755: if ($homeserver eq '') {
4756: if (($cdom =~ /^$match_domain$/) && ($cnum =~ /^$match_courseid$/)) {
4757: $homeserver = &homeserver($cnum,$cdom);
4758: }
4759: }
4760: if ($homeserver eq '') {
4761: $authchk = 'nodomain';
4762: } else {
4763: $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
4764: if ($response eq 'refused') {
4765: $authchk = 'refused';
4766: } else {
4767: ($authparam,$create_passwd,$authchk) = split(/:/,$response);
4768: }
4769: }
4770: return ($authparam,$create_passwd,$authchk);
4771: }
4772:
4773: sub auto_photo_permission {
4774: my ($cnum,$cdom,$students) = @_;
4775: my $homeserver = &homeserver($cnum,$cdom);
4776: my ($outcome,$perm_reqd,$conditions) =
4777: split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
4778: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4779: return (undef,undef);
4780: }
4781: return ($outcome,$perm_reqd,$conditions);
4782: }
4783:
4784: sub auto_checkphotos {
4785: my ($uname,$udom,$pid) = @_;
4786: my $homeserver = &homeserver($uname,$udom);
4787: my ($result,$resulttype);
4788: my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
4789: &escape($uname).':'.&escape($pid),
4790: $homeserver));
4791: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4792: return (undef,undef);
4793: }
4794: if ($outcome) {
4795: ($result,$resulttype) = split(/:/,$outcome);
4796: }
4797: return ($result,$resulttype);
4798: }
4799:
4800: sub auto_photochoice {
4801: my ($cnum,$cdom) = @_;
4802: my $homeserver = &homeserver($cnum,$cdom);
4803: my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
4804: &escape($cdom),
4805: $homeserver)));
4806: if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4807: return (undef,undef);
4808: }
4809: return ($update,$comment);
4810: }
4811:
4812: sub auto_photoupdate {
4813: my ($affiliatesref,$dom,$cnum,$photo) = @_;
4814: my $homeserver = &homeserver($cnum,$dom);
4815: my $host=&hostname($homeserver);
4816: my $cmd = '';
4817: my $maxtries = 1;
4818: foreach my $affiliate (keys(%{$affiliatesref})) {
4819: $cmd .= $affiliate.'='.join(",",@{$$affiliatesref{$affiliate}}).'%%';
4820: }
4821: $cmd =~ s/%%$//;
4822: $cmd = &escape($cmd);
4823: my $query = 'institutionalphotos';
4824: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
4825: unless ($queryid=~/^\Q$host\E\_/) {
4826: &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
4827: return 'error: '.$queryid;
4828: }
4829: my $reply = &get_query_reply($queryid);
4830: my $tries = 1;
4831: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4832: $reply = &get_query_reply($queryid);
4833: $tries ++;
4834: }
4835: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4836: &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4837: } else {
4838: my @responses = split(/:/,$reply);
4839: my $outcome = shift(@responses);
4840: foreach my $item (@responses) {
4841: my ($key,$value) = split(/=/,$item);
4842: $$photo{$key} = $value;
4843: }
4844: return $outcome;
4845: }
4846: return 'error';
4847: }
4848:
4849: sub auto_instcode_format {
4850: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,
4851: $cat_order) = @_;
4852: my $courses = '';
4853: my @homeservers;
4854: if ($caller eq 'global') {
4855: my %servers = &get_servers($codedom,'library');
4856: foreach my $tryserver (keys(%servers)) {
4857: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4858: push(@homeservers,$tryserver);
4859: }
4860: }
4861: } else {
4862: push(@homeservers,&homeserver($caller,$codedom));
4863: }
4864: foreach my $code (keys(%{$instcodes})) {
4865: $courses .= &escape($code).'='.&escape($$instcodes{$code}).'&';
4866: }
4867: chop($courses);
4868: my $ok_response = 0;
4869: my $response;
4870: while (@homeservers > 0 && $ok_response == 0) {
4871: my $server = shift(@homeservers);
4872: $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$server);
4873: if ($response !~ /(con_lost|error|no_such_host|refused)/) {
4874: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) =
4875: split(/:/,$response);
4876: %{$codes} = (%{$codes},&str2hash($codes_str));
4877: push(@{$codetitles},&str2array($codetitles_str));
4878: %{$cat_titles} = (%{$cat_titles},&str2hash($cat_titles_str));
4879: %{$cat_order} = (%{$cat_order},&str2hash($cat_order_str));
4880: $ok_response = 1;
4881: }
4882: }
4883: if ($ok_response) {
4884: return 'ok';
4885: } else {
4886: return $response;
4887: }
4888: }
4889:
4890: sub auto_instcode_defaults {
4891: my ($domain,$returnhash,$code_order) = @_;
4892: my @homeservers;
4893:
4894: my %servers = &get_servers($domain,'library');
4895: foreach my $tryserver (keys(%servers)) {
4896: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4897: push(@homeservers,$tryserver);
4898: }
4899: }
4900:
4901: my $response;
4902: foreach my $server (@homeservers) {
4903: $response=&reply('autoinstcodedefaults:'.$domain,$server);
4904: next if ($response =~ /(con_lost|error|no_such_host|refused)/);
4905:
4906: foreach my $pair (split(/\&/,$response)) {
4907: my ($name,$value)=split(/\=/,$pair);
4908: if ($name eq 'code_order') {
4909: @{$code_order} = split(/\&/,&unescape($value));
4910: } else {
4911: $returnhash->{&unescape($name)}=&unescape($value);
4912: }
4913: }
4914: return 'ok';
4915: }
4916:
4917: return $response;
4918: }
4919:
4920: sub auto_validate_class_sec {
4921: my ($cdom,$cnum,$owner,$inst_class) = @_;
4922: my $homeserver = &homeserver($cnum,$cdom);
4923: my $response=&reply('autovalidateclass_sec:'.$inst_class.':'.
4924: &escape($owner).':'.$cdom,$homeserver);
4925: return $response;
4926: }
4927:
4928: # ------------------------------------------------------- Course Group routines
4929:
4930: sub get_coursegroups {
4931: my ($cdom,$cnum,$group,$namespace) = @_;
4932: return(&dump($namespace,$cdom,$cnum,$group));
4933: }
4934:
4935: sub modify_coursegroup {
4936: my ($cdom,$cnum,$groupsettings) = @_;
4937: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
4938: }
4939:
4940: sub toggle_coursegroup_status {
4941: my ($cdom,$cnum,$group,$action) = @_;
4942: my ($from_namespace,$to_namespace);
4943: if ($action eq 'delete') {
4944: $from_namespace = 'coursegroups';
4945: $to_namespace = 'deleted_groups';
4946: } else {
4947: $from_namespace = 'deleted_groups';
4948: $to_namespace = 'coursegroups';
4949: }
4950: my %curr_group = &get_coursegroups($cdom,$cnum,$group,$from_namespace);
4951: if (my $tmp = &error(%curr_group)) {
4952: &Apache::lonnet::logthis('Error retrieving group: '.$tmp.' in '.$cnum.':'.$cdom);
4953: return ('read error',$tmp);
4954: } else {
4955: my %savedsettings = %curr_group;
4956: my $result = &put($to_namespace,\%savedsettings,$cdom,$cnum);
4957: my $deloutcome;
4958: if ($result eq 'ok') {
4959: $deloutcome = &del($from_namespace,[$group],$cdom,$cnum);
4960: } else {
4961: return ('write error',$result);
4962: }
4963: if ($deloutcome eq 'ok') {
4964: return 'ok';
4965: } else {
4966: return ('delete error',$deloutcome);
4967: }
4968: }
4969: }
4970:
4971: sub modify_group_roles {
4972: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
4973: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
4974: my $role = 'gr/'.&escape($userprivs);
4975: my ($uname,$udom) = split(/:/,$user);
4976: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
4977: if ($result eq 'ok') {
4978: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
4979: }
4980: return $result;
4981: }
4982:
4983: sub modify_coursegroup_membership {
4984: my ($cdom,$cnum,$membership) = @_;
4985: my $result = &put('groupmembership',$membership,$cdom,$cnum);
4986: return $result;
4987: }
4988:
4989: sub get_active_groups {
4990: my ($udom,$uname,$cdom,$cnum) = @_;
4991: my $now = time;
4992: my %groups = ();
4993: foreach my $key (keys(%env)) {
4994: if ($key =~ m-user\.role\.gr\./($match_domain)/($match_courseid)/(\w+)$-) {
4995: my ($start,$end) = split(/\./,$env{$key});
4996: if (($end!=0) && ($end<$now)) { next; }
4997: if (($start!=0) && ($start>$now)) { next; }
4998: if ($1 eq $cdom && $2 eq $cnum) {
4999: $groups{$3} = $env{$key} ;
5000: }
5001: }
5002: }
5003: return %groups;
5004: }
5005:
5006: sub get_group_membership {
5007: my ($cdom,$cnum,$group) = @_;
5008: return(&dump('groupmembership',$cdom,$cnum,$group));
5009: }
5010:
5011: sub get_users_groups {
5012: my ($udom,$uname,$courseid) = @_;
5013: my @usersgroups;
5014: my $cachetime=1800;
5015:
5016: my $hashid="$udom:$uname:$courseid";
5017: my ($grouplist,$cached)=&is_cached_new('getgroups',$hashid);
5018: if (defined($cached)) {
5019: @usersgroups = split(/:/,$grouplist);
5020: } else {
5021: $grouplist = '';
5022: my $courseurl = &courseid_to_courseurl($courseid);
5023: my %roleshash = &dump('roles',$udom,$uname,$courseurl);
5024: my $access_end = $env{'course.'.$courseid.
5025: '.default_enrollment_end_date'};
5026: my $now = time;
5027: foreach my $key (keys(%roleshash)) {
5028: if ($key =~ /^\Q$courseurl\E\/(\w+)\_gr$/) {
5029: my $group = $1;
5030: if ($roleshash{$key} =~ /_(\d+)_(\d+)$/) {
5031: my $start = $2;
5032: my $end = $1;
5033: if ($start == -1) { next; } # deleted from group
5034: if (($start!=0) && ($start>$now)) { next; }
5035: if (($end!=0) && ($end<$now)) {
5036: if ($access_end && $access_end < $now) {
5037: if ($access_end - $end < 86400) {
5038: push(@usersgroups,$group);
5039: }
5040: }
5041: next;
5042: }
5043: push(@usersgroups,$group);
5044: }
5045: }
5046: }
5047: @usersgroups = &sort_course_groups($courseid,@usersgroups);
5048: $grouplist = join(':',@usersgroups);
5049: &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
5050: }
5051: return @usersgroups;
5052: }
5053:
5054: sub devalidate_getgroups_cache {
5055: my ($udom,$uname,$cdom,$cnum)=@_;
5056: my $courseid = $cdom.'_'.$cnum;
5057:
5058: my $hashid="$udom:$uname:$courseid";
5059: &devalidate_cache_new('getgroups',$hashid);
5060: }
5061:
5062: # ------------------------------------------------------------------ Plain Text
5063:
5064: sub plaintext {
5065: my ($short,$type,$cid) = @_;
5066: if ($short =~ /^cr/) {
5067: return (split('/',$short))[-1];
5068: }
5069: if (!defined($cid)) {
5070: $cid = $env{'request.course.id'};
5071: }
5072: if (defined($cid) && defined($env{'course.'.$cid.'.'.$short.'.plaintext'})) {
5073: return &Apache::lonlocal::mt($env{'course.'.$cid.'.'.$short.
5074: '.plaintext'});
5075: }
5076: my %rolenames = (
5077: Course => 'std',
5078: Group => 'alt1',
5079: );
5080: if (defined($type) &&
5081: defined($rolenames{$type}) &&
5082: defined($prp{$short}{$rolenames{$type}})) {
5083: return &Apache::lonlocal::mt($prp{$short}{$rolenames{$type}});
5084: } else {
5085: return &Apache::lonlocal::mt($prp{$short}{'std'});
5086: }
5087: }
5088:
5089: # ----------------------------------------------------------------- Assign Role
5090:
5091: sub assignrole {
5092: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
5093: my $mrole;
5094: if ($role =~ /^cr\//) {
5095: my $cwosec=$url;
5096: $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
5097: unless (&allowed('ccr',$cwosec)) {
5098: &logthis('Refused custom assignrole: '.
5099: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
5100: $env{'user.name'}.' at '.$env{'user.domain'});
5101: return 'refused';
5102: }
5103: $mrole='cr';
5104: } elsif ($role =~ /^gr\//) {
5105: my $cwogrp=$url;
5106: $cwogrp=~s{^/($match_domain)/($match_courseid)/.*}{$1/$2};
5107: unless (&allowed('mdg',$cwogrp)) {
5108: &logthis('Refused group assignrole: '.
5109: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
5110: $env{'user.name'}.' at '.$env{'user.domain'});
5111: return 'refused';
5112: }
5113: $mrole='gr';
5114: } else {
5115: my $cwosec=$url;
5116: $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
5117: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
5118: &logthis('Refused assignrole: '.
5119: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
5120: $env{'user.name'}.' at '.$env{'user.domain'});
5121: return 'refused';
5122: }
5123: $mrole=$role;
5124: }
5125: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
5126: "$udom:$uname:$url".'_'."$mrole=$role";
5127: if ($end) { $command.='_'.$end; }
5128: if ($start) {
5129: if ($end) {
5130: $command.='_'.$start;
5131: } else {
5132: $command.='_0_'.$start;
5133: }
5134: }
5135: my $origstart = $start;
5136: my $origend = $end;
5137: # actually delete
5138: if ($deleteflag) {
5139: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
5140: # modify command to delete the role
5141: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
5142: "$udom:$uname:$url".'_'."$mrole";
5143: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
5144: # set start and finish to negative values for userrolelog
5145: $start=-1;
5146: $end=-1;
5147: }
5148: }
5149: # send command
5150: my $answer=&reply($command,&homeserver($uname,$udom));
5151: # log new user role if status is ok
5152: if ($answer eq 'ok') {
5153: &userrolelog($role,$uname,$udom,$url,$start,$end);
5154: # for course roles, perform group memberships changes triggered by role change.
5155: unless ($role =~ /^gr/) {
5156: &Apache::longroup::group_changes($udom,$uname,$url,$role,$origend,
5157: $origstart);
5158: }
5159: }
5160: return $answer;
5161: }
5162:
5163: # -------------------------------------------------- Modify user authentication
5164: # Overrides without validation
5165:
5166: sub modifyuserauth {
5167: my ($udom,$uname,$umode,$upass)=@_;
5168: my $uhome=&homeserver($uname,$udom);
5169: unless (&allowed('mau',$udom)) { return 'refused'; }
5170: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
5171: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
5172: ' in domain '.$env{'request.role.domain'});
5173: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
5174: &escape($upass),$uhome);
5175: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
5176: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
5177: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
5178: &log($udom,,$uname,$uhome,
5179: 'Authentication changed by '.$env{'user.domain'}.', '.
5180: $env{'user.name'}.', '.$umode.
5181: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
5182: unless ($reply eq 'ok') {
5183: &logthis('Authentication mode error: '.$reply);
5184: return 'error: '.$reply;
5185: }
5186: return 'ok';
5187: }
5188:
5189: # --------------------------------------------------------------- Modify a user
5190:
5191: sub modifyuser {
5192: my ($udom, $uname, $uid,
5193: $umode, $upass, $first,
5194: $middle, $last, $gene,
5195: $forceid, $desiredhome, $email)=@_;
5196: $udom= &LONCAPA::clean_domain($udom);
5197: $uname=&LONCAPA::clean_username($uname);
5198: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
5199: $umode.', '.$first.', '.$middle.', '.
5200: $last.', '.$gene.'(forceid: '.$forceid.')'.
5201: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
5202: ' desiredhome not specified').
5203: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
5204: ' in domain '.$env{'request.role.domain'});
5205: my $uhome=&homeserver($uname,$udom,'true');
5206: # ----------------------------------------------------------------- Create User
5207: if (($uhome eq 'no_host') &&
5208: (($umode && $upass) || ($umode eq 'localauth'))) {
5209: my $unhome='';
5210: if (defined($desiredhome) && &host_domain($desiredhome) eq $udom) {
5211: $unhome = $desiredhome;
5212: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
5213: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
5214: } else { # load balancing routine for determining $unhome
5215: my $loadm=10000000;
5216: my %servers = &get_servers($udom,'library');
5217: foreach my $tryserver (keys(%servers)) {
5218: my $answer=reply('load',$tryserver);
5219: if (($answer=~/\d+/) && ($answer<$loadm)) {
5220: $loadm=$answer;
5221: $unhome=$tryserver;
5222: }
5223: }
5224: }
5225: if (($unhome eq '') || ($unhome eq 'no_host')) {
5226: return 'error: unable to find a home server for '.$uname.
5227: ' in domain '.$udom;
5228: }
5229: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
5230: &escape($upass),$unhome);
5231: unless ($reply eq 'ok') {
5232: return 'error: '.$reply;
5233: }
5234: $uhome=&homeserver($uname,$udom,'true');
5235: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
5236: return 'error: unable verify users home machine.';
5237: }
5238: } # End of creation of new user
5239: # ---------------------------------------------------------------------- Add ID
5240: if ($uid) {
5241: $uid=~tr/A-Z/a-z/;
5242: my %uidhash=&idrget($udom,$uname);
5243: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
5244: && (!$forceid)) {
5245: unless ($uid eq $uidhash{$uname}) {
5246: return 'error: user id "'.$uid.'" does not match '.
5247: 'current user id "'.$uidhash{$uname}.'".';
5248: }
5249: } else {
5250: &idput($udom,($uname => $uid));
5251: }
5252: }
5253: # -------------------------------------------------------------- Add names, etc
5254: my @tmp=&get('environment',
5255: ['firstname','middlename','lastname','generation','id',
5256: 'permanentemail'],
5257: $udom,$uname);
5258: my %names;
5259: if ($tmp[0] =~ m/^error:.*/) {
5260: %names=();
5261: } else {
5262: %names = @tmp;
5263: }
5264: #
5265: # Make sure to not trash student environment if instructor does not bother
5266: # to supply name and email information
5267: #
5268: if ($first) { $names{'firstname'} = $first; }
5269: if (defined($middle)) { $names{'middlename'} = $middle; }
5270: if ($last) { $names{'lastname'} = $last; }
5271: if (defined($gene)) { $names{'generation'} = $gene; }
5272: if ($email) {
5273: $email=~s/[^\w\@\.\-\,]//gs;
5274: if ($email=~/\@/) { $names{'notification'} = $email;
5275: $names{'critnotification'} = $email;
5276: $names{'permanentemail'} = $email; }
5277: }
5278: if ($uid) { $names{'id'} = $uid; }
5279: my $reply = &put('environment', \%names, $udom,$uname);
5280: if ($reply ne 'ok') { return 'error: '.$reply; }
5281: my $sqlresult = &update_allusers_table($uname,$udom,\%names);
5282: &devalidate_cache_new('namescache',$uname.':'.$udom);
5283: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
5284: $umode.', '.$first.', '.$middle.', '.
5285: $last.', '.$gene.' by '.
5286: $env{'user.name'}.' at '.$env{'user.domain'});
5287: return 'ok';
5288: }
5289:
5290: # -------------------------------------------------------------- Modify student
5291:
5292: sub modifystudent {
5293: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
5294: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
5295: if (!$cid) {
5296: unless ($cid=$env{'request.course.id'}) {
5297: return 'not_in_class';
5298: }
5299: }
5300: # --------------------------------------------------------------- Make the user
5301: my $reply=&modifyuser
5302: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
5303: $desiredhome,$email);
5304: unless ($reply eq 'ok') { return $reply; }
5305: # This will cause &modify_student_enrollment to get the uid from the
5306: # students environment
5307: $uid = undef if (!$forceid);
5308: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
5309: $gene,$usec,$end,$start,$type,$locktype,$cid);
5310: return $reply;
5311: }
5312:
5313: sub modify_student_enrollment {
5314: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
5315: my ($cdom,$cnum,$chome);
5316: if (!$cid) {
5317: unless ($cid=$env{'request.course.id'}) {
5318: return 'not_in_class';
5319: }
5320: $cdom=$env{'course.'.$cid.'.domain'};
5321: $cnum=$env{'course.'.$cid.'.num'};
5322: } else {
5323: ($cdom,$cnum)=split(/_/,$cid);
5324: }
5325: $chome=$env{'course.'.$cid.'.home'};
5326: if (!$chome) {
5327: $chome=&homeserver($cnum,$cdom);
5328: }
5329: if (!$chome) { return 'unknown_course'; }
5330: # Make sure the user exists
5331: my $uhome=&homeserver($uname,$udom);
5332: if (($uhome eq '') || ($uhome eq 'no_host')) {
5333: return 'error: no such user';
5334: }
5335: # Get student data if we were not given enough information
5336: if (!defined($first) || $first eq '' ||
5337: !defined($last) || $last eq '' ||
5338: !defined($uid) || $uid eq '' ||
5339: !defined($middle) || $middle eq '' ||
5340: !defined($gene) || $gene eq '') {
5341: # They did not supply us with enough data to enroll the student, so
5342: # we need to pick up more information.
5343: my %tmp = &get('environment',
5344: ['firstname','middlename','lastname', 'generation','id']
5345: ,$udom,$uname);
5346:
5347: #foreach my $key (keys(%tmp)) {
5348: # &logthis("key $key = ".$tmp{$key});
5349: #}
5350: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
5351: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
5352: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
5353: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
5354: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
5355: }
5356: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
5357: my $reply=cput('classlist',
5358: {"$uname:$udom" =>
5359: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
5360: $cdom,$cnum);
5361: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
5362: return 'error: '.$reply;
5363: } else {
5364: &devalidate_getsection_cache($udom,$uname,$cid);
5365: }
5366: # Add student role to user
5367: my $uurl='/'.$cid;
5368: $uurl=~s/\_/\//g;
5369: if ($usec) {
5370: $uurl.='/'.$usec;
5371: }
5372: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
5373: }
5374:
5375: sub format_name {
5376: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
5377: my $name;
5378: if ($first ne 'lastname') {
5379: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
5380: } else {
5381: if ($lastname=~/\S/) {
5382: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
5383: $name=~s/\s+,/,/;
5384: } else {
5385: $name.= $firstname.' '.$middlename.' '.$generation;
5386: }
5387: }
5388: $name=~s/^\s+//;
5389: $name=~s/\s+$//;
5390: $name=~s/\s+/ /g;
5391: return $name;
5392: }
5393:
5394: # ------------------------------------------------- Write to course preferences
5395:
5396: sub writecoursepref {
5397: my ($courseid,%prefs)=@_;
5398: $courseid=~s/^\///;
5399: $courseid=~s/\_/\//g;
5400: my ($cdomain,$cnum)=split(/\//,$courseid);
5401: my $chome=homeserver($cnum,$cdomain);
5402: if (($chome eq '') || ($chome eq 'no_host')) {
5403: return 'error: no such course';
5404: }
5405: my $cstring='';
5406: foreach my $pref (keys(%prefs)) {
5407: $cstring.=&escape($pref).'='.&escape($prefs{$pref}).'&';
5408: }
5409: $cstring=~s/\&$//;
5410: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
5411: }
5412:
5413: # ---------------------------------------------------------- Make/modify course
5414:
5415: sub createcourse {
5416: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,
5417: $course_owner,$crstype)=@_;
5418: $url=&declutter($url);
5419: my $cid='';
5420: unless (&allowed('ccc',$udom)) {
5421: return 'refused';
5422: }
5423: # ------------------------------------------------------------------- Create ID
5424: my $uname=int(1+rand(9)).
5425: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
5426: substr($$.time,0,5).unpack("H8",pack("I32",time)).
5427: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
5428: # ----------------------------------------------- Make sure that does not exist
5429: my $uhome=&homeserver($uname,$udom,'true');
5430: unless (($uhome eq '') || ($uhome eq 'no_host')) {
5431: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
5432: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
5433: $uhome=&homeserver($uname,$udom,'true');
5434: unless (($uhome eq '') || ($uhome eq 'no_host')) {
5435: return 'error: unable to generate unique course-ID';
5436: }
5437: }
5438: # ------------------------------------------------ Check supplied server name
5439: $course_server = $env{'user.homeserver'} if (! defined($course_server));
5440: if (! &is_library($course_server)) {
5441: return 'error:bad server name '.$course_server;
5442: }
5443: # ------------------------------------------------------------- Make the course
5444: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
5445: $course_server);
5446: unless ($reply eq 'ok') { return 'error: '.$reply; }
5447: $uhome=&homeserver($uname,$udom,'true');
5448: if (($uhome eq '') || ($uhome eq 'no_host')) {
5449: return 'error: no such course';
5450: }
5451: # ----------------------------------------------------------------- Course made
5452: # log existence
5453: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
5454: ':'.&escape($inst_code).':'.&escape($course_owner).':'.
5455: &escape($crstype),$uhome);
5456: &flushcourselogs();
5457: # set toplevel url
5458: my $topurl=$url;
5459: unless ($nonstandard) {
5460: # ------------------------------------------ For standard courses, make top url
5461: my $mapurl=&clutter($url);
5462: if ($mapurl eq '/res/') { $mapurl=''; }
5463: $env{'form.initmap'}=(<<ENDINITMAP);
5464: <map>
5465: <resource id="1" type="start"></resource>
5466: <resource id="2" src="$mapurl"></resource>
5467: <resource id="3" type="finish"></resource>
5468: <link index="1" from="1" to="2"></link>
5469: <link index="2" from="2" to="3"></link>
5470: </map>
5471: ENDINITMAP
5472: $topurl=&declutter(
5473: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
5474: );
5475: }
5476: # ----------------------------------------------------------- Write preferences
5477: &writecoursepref($udom.'_'.$uname,
5478: ('description' => $description,
5479: 'url' => $topurl));
5480: return '/'.$udom.'/'.$uname;
5481: }
5482:
5483: sub is_course {
5484: my ($cdom,$cnum) = @_;
5485: my %courses = &courseiddump($cdom,'.',1,'.','.',$cnum,undef,
5486: undef,'.');
5487: if (exists($courses{$cdom.'_'.$cnum})) {
5488: return 1;
5489: }
5490: return 0;
5491: }
5492:
5493: # ---------------------------------------------------------- Assign Custom Role
5494:
5495: sub assigncustomrole {
5496: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
5497: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
5498: $end,$start,$deleteflag);
5499: }
5500:
5501: # ----------------------------------------------------------------- Revoke Role
5502:
5503: sub revokerole {
5504: my ($udom,$uname,$url,$role,$deleteflag)=@_;
5505: my $now=time;
5506: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
5507: }
5508:
5509: # ---------------------------------------------------------- Revoke Custom Role
5510:
5511: sub revokecustomrole {
5512: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
5513: my $now=time;
5514: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
5515: $deleteflag);
5516: }
5517:
5518: # ------------------------------------------------------------ Disk usage
5519: sub diskusage {
5520: my ($udom,$uname,$directoryRoot)=@_;
5521: $directoryRoot =~ s/\/$//;
5522: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
5523: return $listing;
5524: }
5525:
5526: sub is_locked {
5527: my ($file_name, $domain, $user) = @_;
5528: my @check;
5529: my $is_locked;
5530: push @check, $file_name;
5531: my %locked = &get('file_permissions',\@check,
5532: $env{'user.domain'},$env{'user.name'});
5533: my ($tmp)=keys(%locked);
5534: if ($tmp=~/^error:/) { undef(%locked); }
5535:
5536: if (ref($locked{$file_name}) eq 'ARRAY') {
5537: $is_locked = 'false';
5538: foreach my $entry (@{$locked{$file_name}}) {
5539: if (ref($entry) eq 'ARRAY') {
5540: $is_locked = 'true';
5541: last;
5542: }
5543: }
5544: } else {
5545: $is_locked = 'false';
5546: }
5547: }
5548:
5549: sub declutter_portfile {
5550: my ($file) = @_;
5551: $file =~ s{^(/portfolio/|portfolio/)}{/};
5552: return $file;
5553: }
5554:
5555: # ------------------------------------------------------------- Mark as Read Only
5556:
5557: sub mark_as_readonly {
5558: my ($domain,$user,$files,$what) = @_;
5559: my %current_permissions = &dump('file_permissions',$domain,$user);
5560: my ($tmp)=keys(%current_permissions);
5561: if ($tmp=~/^error:/) { undef(%current_permissions); }
5562: foreach my $file (@{$files}) {
5563: $file = &declutter_portfile($file);
5564: push(@{$current_permissions{$file}},$what);
5565: }
5566: &put('file_permissions',\%current_permissions,$domain,$user);
5567: return;
5568: }
5569:
5570: # ------------------------------------------------------------Save Selected Files
5571:
5572: sub save_selected_files {
5573: my ($user, $path, @files) = @_;
5574: my $filename = $user."savedfiles";
5575: my @other_files = &files_not_in_path($user, $path);
5576: open (OUT, '>'.$tmpdir.$filename);
5577: foreach my $file (@files) {
5578: print (OUT $env{'form.currentpath'}.$file."\n");
5579: }
5580: foreach my $file (@other_files) {
5581: print (OUT $file."\n");
5582: }
5583: close (OUT);
5584: return 'ok';
5585: }
5586:
5587: sub clear_selected_files {
5588: my ($user) = @_;
5589: my $filename = $user."savedfiles";
5590: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5591: print (OUT undef);
5592: close (OUT);
5593: return ("ok");
5594: }
5595:
5596: sub files_in_path {
5597: my ($user, $path) = @_;
5598: my $filename = $user."savedfiles";
5599: my %return_files;
5600: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5601: while (my $line_in = <IN>) {
5602: chomp ($line_in);
5603: my @paths_and_file = split (m!/!, $line_in);
5604: my $file_part = pop (@paths_and_file);
5605: my $path_part = join ('/', @paths_and_file);
5606: $path_part.='/';
5607: my $path_and_file = $path_part.$file_part;
5608: if ($path_part eq $path) {
5609: $return_files{$file_part}= 'selected';
5610: }
5611: }
5612: close (IN);
5613: return (\%return_files);
5614: }
5615:
5616: # called in portfolio select mode, to show files selected NOT in current directory
5617: sub files_not_in_path {
5618: my ($user, $path) = @_;
5619: my $filename = $user."savedfiles";
5620: my @return_files;
5621: my $path_part;
5622: open(IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5623: while (my $line = <IN>) {
5624: #ok, I know it's clunky, but I want it to work
5625: my @paths_and_file = split(m|/|, $line);
5626: my $file_part = pop(@paths_and_file);
5627: chomp($file_part);
5628: my $path_part = join('/', @paths_and_file);
5629: $path_part .= '/';
5630: my $path_and_file = $path_part.$file_part;
5631: if ($path_part ne $path) {
5632: push(@return_files, ($path_and_file));
5633: }
5634: }
5635: close(OUT);
5636: return (@return_files);
5637: }
5638:
5639: #----------------------------------------------Get portfolio file permissions
5640:
5641: sub get_portfile_permissions {
5642: my ($domain,$user) = @_;
5643: my %current_permissions = &dump('file_permissions',$domain,$user);
5644: my ($tmp)=keys(%current_permissions);
5645: if ($tmp=~/^error:/) { undef(%current_permissions); }
5646: return \%current_permissions;
5647: }
5648:
5649: #---------------------------------------------Get portfolio file access controls
5650:
5651: sub get_access_controls {
5652: my ($current_permissions,$group,$file) = @_;
5653: my %access;
5654: my $real_file = $file;
5655: $file =~ s/\.meta$//;
5656: if (defined($file)) {
5657: if (ref($$current_permissions{$file."\0".'accesscontrol'}) eq 'HASH') {
5658: foreach my $control (keys(%{$$current_permissions{$file."\0".'accesscontrol'}})) {
5659: $access{$real_file}{$control} = $$current_permissions{$file."\0".$control};
5660: }
5661: }
5662: } else {
5663: foreach my $key (keys(%{$current_permissions})) {
5664: if ($key =~ /\0accesscontrol$/) {
5665: if (defined($group)) {
5666: if ($key !~ m-^\Q$group\E/-) {
5667: next;
5668: }
5669: }
5670: my ($fullpath) = split(/\0/,$key);
5671: if (ref($$current_permissions{$key}) eq 'HASH') {
5672: foreach my $control (keys(%{$$current_permissions{$key}})) {
5673: $access{$fullpath}{$control}=$$current_permissions{$fullpath."\0".$control};
5674: }
5675: }
5676: }
5677: }
5678: }
5679: return %access;
5680: }
5681:
5682: sub modify_access_controls {
5683: my ($file_name,$changes,$domain,$user)=@_;
5684: my ($outcome,$deloutcome);
5685: my %store_permissions;
5686: my %new_values;
5687: my %new_control;
5688: my %translation;
5689: my @deletions = ();
5690: my $now = time;
5691: if (exists($$changes{'activate'})) {
5692: if (ref($$changes{'activate'}) eq 'HASH') {
5693: my @newitems = sort(keys(%{$$changes{'activate'}}));
5694: my $numnew = scalar(@newitems);
5695: for (my $i=0; $i<$numnew; $i++) {
5696: my $newkey = $newitems[$i];
5697: my $newid = &Apache::loncommon::get_cgi_id();
5698: if ($newkey =~ /^\d+:/) {
5699: $newkey =~ s/^(\d+)/$newid/;
5700: $translation{$1} = $newid;
5701: } elsif ($newkey =~ /^\d+_\d+_\d+:/) {
5702: $newkey =~ s/^(\d+_\d+_\d+)/$newid/;
5703: $translation{$1} = $newid;
5704: }
5705: $new_values{$file_name."\0".$newkey} =
5706: $$changes{'activate'}{$newitems[$i]};
5707: $new_control{$newkey} = $now;
5708: }
5709: }
5710: }
5711: my %todelete;
5712: my %changed_items;
5713: foreach my $action ('delete','update') {
5714: if (exists($$changes{$action})) {
5715: if (ref($$changes{$action}) eq 'HASH') {
5716: foreach my $key (keys(%{$$changes{$action}})) {
5717: my ($itemnum) = ($key =~ /^([^:]+):/);
5718: if ($action eq 'delete') {
5719: $todelete{$itemnum} = 1;
5720: } else {
5721: $changed_items{$itemnum} = $key;
5722: }
5723: }
5724: }
5725: }
5726: }
5727: # get lock on access controls for file.
5728: my $lockhash = {
5729: $file_name."\0".'locked_access_records' => $env{'user.name'}.
5730: ':'.$env{'user.domain'},
5731: };
5732: my $tries = 0;
5733: my $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5734:
5735: while (($gotlock ne 'ok') && $tries <3) {
5736: $tries ++;
5737: sleep 1;
5738: $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5739: }
5740: if ($gotlock eq 'ok') {
5741: my %curr_permissions = &dump('file_permissions',$domain,$user,$file_name);
5742: my ($tmp)=keys(%curr_permissions);
5743: if ($tmp=~/^error:/) { undef(%curr_permissions); }
5744: if (exists($curr_permissions{$file_name."\0".'accesscontrol'})) {
5745: my $curr_controls = $curr_permissions{$file_name."\0".'accesscontrol'};
5746: if (ref($curr_controls) eq 'HASH') {
5747: foreach my $control_item (keys(%{$curr_controls})) {
5748: my ($itemnum) = ($control_item =~ /^([^:]+):/);
5749: if (defined($todelete{$itemnum})) {
5750: push(@deletions,$file_name."\0".$control_item);
5751: } else {
5752: if (defined($changed_items{$itemnum})) {
5753: $new_control{$changed_items{$itemnum}} = $now;
5754: push(@deletions,$file_name."\0".$control_item);
5755: $new_values{$file_name."\0".$changed_items{$itemnum}} = $$changes{'update'}{$changed_items{$itemnum}};
5756: } else {
5757: $new_control{$control_item} = $$curr_controls{$control_item};
5758: }
5759: }
5760: }
5761: }
5762: }
5763: $deloutcome = &del('file_permissions',\@deletions,$domain,$user);
5764: $new_values{$file_name."\0".'accesscontrol'} = \%new_control;
5765: $outcome = &put('file_permissions',\%new_values,$domain,$user);
5766: # remove lock
5767: my @del_lock = ($file_name."\0".'locked_access_records');
5768: my $dellockoutcome = &del('file_permissions',\@del_lock,$domain,$user);
5769: my ($file,$group);
5770: if (&is_course($domain,$user)) {
5771: ($group,$file) = split(/\//,$file_name,2);
5772: } else {
5773: $file = $file_name;
5774: }
5775: my $sqlresult =
5776: &update_portfolio_table($user,$domain,$file,'portfolio_access',
5777: $group);
5778: } else {
5779: $outcome = "error: could not obtain lockfile\n";
5780: }
5781: return ($outcome,$deloutcome,\%new_values,\%translation);
5782: }
5783:
5784: sub make_public_indefinitely {
5785: my ($requrl) = @_;
5786: my $now = time;
5787: my $action = 'activate';
5788: my $aclnum = 0;
5789: if (&is_portfolio_url($requrl)) {
5790: my (undef,$udom,$unum,$file_name,$group) =
5791: &parse_portfolio_url($requrl);
5792: my $current_perms = &get_portfile_permissions($udom,$unum);
5793: my %access_controls = &get_access_controls($current_perms,
5794: $group,$file_name);
5795: foreach my $key (keys(%{$access_controls{$file_name}})) {
5796: my ($num,$scope,$end,$start) =
5797: ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
5798: if ($scope eq 'public') {
5799: if ($start <= $now && $end == 0) {
5800: $action = 'none';
5801: } else {
5802: $action = 'update';
5803: $aclnum = $num;
5804: }
5805: last;
5806: }
5807: }
5808: if ($action eq 'none') {
5809: return 'ok';
5810: } else {
5811: my %changes;
5812: my $newend = 0;
5813: my $newstart = $now;
5814: my $newkey = $aclnum.':public_'.$newend.'_'.$newstart;
5815: $changes{$action}{$newkey} = {
5816: type => 'public',
5817: time => {
5818: start => $newstart,
5819: end => $newend,
5820: },
5821: };
5822: my ($outcome,$deloutcome,$new_values,$translation) =
5823: &modify_access_controls($file_name,\%changes,$udom,$unum);
5824: return $outcome;
5825: }
5826: } else {
5827: return 'invalid';
5828: }
5829: }
5830:
5831: #------------------------------------------------------Get Marked as Read Only
5832:
5833: sub get_marked_as_readonly {
5834: my ($domain,$user,$what,$group) = @_;
5835: my $current_permissions = &get_portfile_permissions($domain,$user);
5836: my @readonly_files;
5837: my $cmp1=$what;
5838: if (ref($what)) { $cmp1=join('',@{$what}) };
5839: while (my ($file_name,$value) = each(%{$current_permissions})) {
5840: if (defined($group)) {
5841: if ($file_name !~ m-^\Q$group\E/-) {
5842: next;
5843: }
5844: }
5845: if (ref($value) eq "ARRAY"){
5846: foreach my $stored_what (@{$value}) {
5847: my $cmp2=$stored_what;
5848: if (ref($stored_what) eq 'ARRAY') {
5849: $cmp2=join('',@{$stored_what});
5850: }
5851: if ($cmp1 eq $cmp2) {
5852: push(@readonly_files, $file_name);
5853: last;
5854: } elsif (!defined($what)) {
5855: push(@readonly_files, $file_name);
5856: last;
5857: }
5858: }
5859: }
5860: }
5861: return @readonly_files;
5862: }
5863: #-----------------------------------------------------------Get Marked as Read Only Hash
5864:
5865: sub get_marked_as_readonly_hash {
5866: my ($current_permissions,$group,$what) = @_;
5867: my %readonly_files;
5868: while (my ($file_name,$value) = each(%{$current_permissions})) {
5869: if (defined($group)) {
5870: if ($file_name !~ m-^\Q$group\E/-) {
5871: next;
5872: }
5873: }
5874: if (ref($value) eq "ARRAY"){
5875: foreach my $stored_what (@{$value}) {
5876: if (ref($stored_what) eq 'ARRAY') {
5877: foreach my $lock_descriptor(@{$stored_what}) {
5878: if ($lock_descriptor eq 'graded') {
5879: $readonly_files{$file_name} = 'graded';
5880: } elsif ($lock_descriptor eq 'handback') {
5881: $readonly_files{$file_name} = 'handback';
5882: } else {
5883: if (!exists($readonly_files{$file_name})) {
5884: $readonly_files{$file_name} = 'locked';
5885: }
5886: }
5887: }
5888: }
5889: }
5890: }
5891: }
5892: return %readonly_files;
5893: }
5894: # ------------------------------------------------------------ Unmark as Read Only
5895:
5896: sub unmark_as_readonly {
5897: # unmarks $file_name (if $file_name is defined), or all files locked by $what
5898: # for portfolio submissions, $what contains [$symb,$crsid]
5899: my ($domain,$user,$what,$file_name,$group) = @_;
5900: $file_name = &declutter_portfile($file_name);
5901: my $symb_crs = $what;
5902: if (ref($what)) { $symb_crs=join('',@$what); }
5903: my %current_permissions = &dump('file_permissions',$domain,$user,$group);
5904: my ($tmp)=keys(%current_permissions);
5905: if ($tmp=~/^error:/) { undef(%current_permissions); }
5906: my @readonly_files = &get_marked_as_readonly($domain,$user,$what,$group);
5907: foreach my $file (@readonly_files) {
5908: my $clean_file = &declutter_portfile($file);
5909: if (defined($file_name) && ($file_name ne $clean_file)) { next; }
5910: my $current_locks = $current_permissions{$file};
5911: my @new_locks;
5912: my @del_keys;
5913: if (ref($current_locks) eq "ARRAY"){
5914: foreach my $locker (@{$current_locks}) {
5915: my $compare=$locker;
5916: if (ref($locker) eq 'ARRAY') {
5917: $compare=join('',@{$locker});
5918: if ($compare ne $symb_crs) {
5919: push(@new_locks, $locker);
5920: }
5921: }
5922: }
5923: if (scalar(@new_locks) > 0) {
5924: $current_permissions{$file} = \@new_locks;
5925: } else {
5926: push(@del_keys, $file);
5927: &del('file_permissions',\@del_keys, $domain, $user);
5928: delete($current_permissions{$file});
5929: }
5930: }
5931: }
5932: &put('file_permissions',\%current_permissions,$domain,$user);
5933: return;
5934: }
5935:
5936: # ------------------------------------------------------------ Directory lister
5937:
5938: sub dirlist {
5939: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
5940:
5941: $uri=~s/^\///;
5942: $uri=~s/\/$//;
5943: my ($udom, $uname);
5944: (undef,$udom,$uname)=split(/\//,$uri);
5945: if(defined($userdomain)) {
5946: $udom = $userdomain;
5947: }
5948: if(defined($username)) {
5949: $uname = $username;
5950: }
5951:
5952: my $dirRoot = $perlvar{'lonDocRoot'};
5953: if(defined($alternateDirectoryRoot)) {
5954: $dirRoot = $alternateDirectoryRoot;
5955: $dirRoot =~ s/\/$//;
5956: }
5957:
5958: if($udom) {
5959: if($uname) {
5960: my $listing = &reply('ls2:'.$dirRoot.'/'.$uri,
5961: &homeserver($uname,$udom));
5962: my @listing_results;
5963: if ($listing eq 'unknown_cmd') {
5964: $listing = &reply('ls:'.$dirRoot.'/'.$uri,
5965: &homeserver($uname,$udom));
5966: @listing_results = split(/:/,$listing);
5967: } else {
5968: @listing_results = map { &unescape($_); } split(/:/,$listing);
5969: }
5970: return @listing_results;
5971: } elsif(!defined($alternateDirectoryRoot)) {
5972: my %allusers;
5973: my %servers = &get_servers($udom,'library');
5974: foreach my $tryserver (keys(%servers)) {
5975: my $listing = &reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
5976: $udom, $tryserver);
5977: my @listing_results;
5978: if ($listing eq 'unknown_cmd') {
5979: $listing = &reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
5980: $udom, $tryserver);
5981: @listing_results = split(/:/,$listing);
5982: } else {
5983: @listing_results =
5984: map { &unescape($_); } split(/:/,$listing);
5985: }
5986: if ($listing_results[0] ne 'no_such_dir' &&
5987: $listing_results[0] ne 'empty' &&
5988: $listing_results[0] ne 'con_lost') {
5989: foreach my $line (@listing_results) {
5990: my ($entry) = split(/&/,$line,2);
5991: $allusers{$entry} = 1;
5992: }
5993: }
5994: }
5995: my $alluserstr='';
5996: foreach my $user (sort(keys(%allusers))) {
5997: $alluserstr.=$user.'&user:';
5998: }
5999: $alluserstr=~s/:$//;
6000: return split(/:/,$alluserstr);
6001: } else {
6002: return ('missing user name');
6003: }
6004: } elsif(!defined($alternateDirectoryRoot)) {
6005: my @all_domains = sort(&all_domains());
6006: foreach my $domain (@all_domains) {
6007: $domain = $perlvar{'lonDocRoot'}.'/res/'.$domain.'/&domain';
6008: }
6009: return @all_domains;
6010: } else {
6011: return ('missing domain');
6012: }
6013: }
6014:
6015: # --------------------------------------------- GetFileTimestamp
6016: # This function utilizes dirlist and returns the date stamp for
6017: # when it was last modified. It will also return an error of -1
6018: # if an error occurs
6019:
6020: ##
6021: ## FIXME: This subroutine assumes its caller knows something about the
6022: ## directory structure of the home server for the student ($root).
6023: ## Not a good assumption to make. Since this is for looking up files
6024: ## in user directories, the full path should be constructed by lond, not
6025: ## whatever machine we request data from.
6026: ##
6027: sub GetFileTimestamp {
6028: my ($studentDomain,$studentName,$filename,$root)=@_;
6029: $studentDomain = &LONCAPA::clean_domain($studentDomain);
6030: $studentName = &LONCAPA::clean_username($studentName);
6031: my $subdir=$studentName.'__';
6032: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
6033: my $proname="$studentDomain/$subdir/$studentName";
6034: $proname .= '/'.$filename;
6035: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
6036: $studentName, $root);
6037: my @stats = split('&', $fileStat);
6038: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
6039: # @stats contains first the filename, then the stat output
6040: return $stats[10]; # so this is 10 instead of 9.
6041: } else {
6042: return -1;
6043: }
6044: }
6045:
6046: sub stat_file {
6047: my ($uri) = @_;
6048: $uri = &clutter_with_no_wrapper($uri);
6049:
6050: my ($udom,$uname,$file,$dir);
6051: if ($uri =~ m-^/(uploaded|editupload)/-) {
6052: ($udom,$uname,$file) =
6053: ($uri =~ m-/(?:uploaded|editupload)/?($match_domain)/?($match_name)/?(.*)-);
6054: $file = 'userfiles/'.$file;
6055: $dir = &propath($udom,$uname);
6056: }
6057: if ($uri =~ m-^/res/-) {
6058: ($udom,$uname) =
6059: ($uri =~ m-/(?:res)/?($match_domain)/?($match_username)/-);
6060: $file = $uri;
6061: }
6062:
6063: if (!$udom || !$uname || !$file) {
6064: # unable to handle the uri
6065: return ();
6066: }
6067:
6068: my ($result) = &dirlist($file,$udom,$uname,$dir);
6069: my @stats = split('&', $result);
6070:
6071: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
6072: shift(@stats); #filename is first
6073: return @stats;
6074: }
6075: return ();
6076: }
6077:
6078: # -------------------------------------------------------- Value of a Condition
6079:
6080: # gets the value of a specific preevaluated condition
6081: # stored in the string $env{user.state.<cid>}
6082: # or looks up a condition reference in the bighash and if if hasn't
6083: # already been evaluated recurses into docondval to get the value of
6084: # the condition, then memoizing it to
6085: # $env{user.state.<cid>.<condition>}
6086: sub directcondval {
6087: my $number=shift;
6088: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
6089: &Apache::lonuserstate::evalstate();
6090: }
6091: if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
6092: return $env{'user.state.'.$env{'request.course.id'}.".$number"};
6093: } elsif ($number =~ /^_/) {
6094: my $sub_condition;
6095: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6096: &GDBM_READER(),0640)) {
6097: $sub_condition=$bighash{'conditions'.$number};
6098: untie(%bighash);
6099: }
6100: my $value = &docondval($sub_condition);
6101: &appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
6102: return $value;
6103: }
6104: if ($env{'user.state.'.$env{'request.course.id'}}) {
6105: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
6106: } else {
6107: return 2;
6108: }
6109: }
6110:
6111: # get the collection of conditions for this resource
6112: sub condval {
6113: my $condidx=shift;
6114: my $allpathcond='';
6115: foreach my $cond (split(/\|/,$condidx)) {
6116: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
6117: $allpathcond.=
6118: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
6119: }
6120: }
6121: $allpathcond=~s/\|$//;
6122: return &docondval($allpathcond);
6123: }
6124:
6125: #evaluates an expression of conditions
6126: sub docondval {
6127: my ($allpathcond) = @_;
6128: my $result=0;
6129: if ($env{'request.course.id'}
6130: && defined($allpathcond)) {
6131: my $operand='|';
6132: my @stack;
6133: foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
6134: if ($chunk eq '(') {
6135: push @stack,($operand,$result);
6136: } elsif ($chunk eq ')') {
6137: my $before=pop @stack;
6138: if (pop @stack eq '&') {
6139: $result=$result>$before?$before:$result;
6140: } else {
6141: $result=$result>$before?$result:$before;
6142: }
6143: } elsif (($chunk eq '&') || ($chunk eq '|')) {
6144: $operand=$chunk;
6145: } else {
6146: my $new=directcondval($chunk);
6147: if ($operand eq '&') {
6148: $result=$result>$new?$new:$result;
6149: } else {
6150: $result=$result>$new?$result:$new;
6151: }
6152: }
6153: }
6154: }
6155: return $result;
6156: }
6157:
6158: # ---------------------------------------------------- Devalidate courseresdata
6159:
6160: sub devalidatecourseresdata {
6161: my ($coursenum,$coursedomain)=@_;
6162: my $hashid=$coursenum.':'.$coursedomain;
6163: &devalidate_cache_new('courseres',$hashid);
6164: }
6165:
6166:
6167: # --------------------------------------------------- Course Resourcedata Query
6168: #
6169: # Parameters:
6170: # $coursenum - Number of the course.
6171: # $coursedomain - Domain at which the course was created.
6172: # Returns:
6173: # A hash of the course parameters along (I think) with timestamps
6174: # and version info.
6175:
6176: sub get_courseresdata {
6177: my ($coursenum,$coursedomain)=@_;
6178: my $coursehom=&homeserver($coursenum,$coursedomain);
6179: my $hashid=$coursenum.':'.$coursedomain;
6180: my ($result,$cached)=&is_cached_new('courseres',$hashid);
6181: my %dumpreply;
6182: unless (defined($cached)) {
6183: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
6184: $result=\%dumpreply;
6185: my ($tmp) = keys(%dumpreply);
6186: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
6187: &do_cache_new('courseres',$hashid,$result,600);
6188: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
6189: return $tmp;
6190: } elsif ($tmp =~ /^(error)/) {
6191: $result=undef;
6192: &do_cache_new('courseres',$hashid,$result,600);
6193: }
6194: }
6195: return $result;
6196: }
6197:
6198: sub devalidateuserresdata {
6199: my ($uname,$udom)=@_;
6200: my $hashid="$udom:$uname";
6201: &devalidate_cache_new('userres',$hashid);
6202: }
6203:
6204: sub get_userresdata {
6205: my ($uname,$udom)=@_;
6206: #most student don\'t have any data set, check if there is some data
6207: if (&EXT_cache_status($udom,$uname)) { return undef; }
6208:
6209: my $hashid="$udom:$uname";
6210: my ($result,$cached)=&is_cached_new('userres',$hashid);
6211: if (!defined($cached)) {
6212: my %resourcedata=&dump('resourcedata',$udom,$uname);
6213: $result=\%resourcedata;
6214: &do_cache_new('userres',$hashid,$result,600);
6215: }
6216: my ($tmp)=keys(%$result);
6217: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
6218: return $result;
6219: }
6220: #error 2 occurs when the .db doesn't exist
6221: if ($tmp!~/error: 2 /) {
6222: &logthis("<font color=\"blue\">WARNING:".
6223: " Trying to get resource data for ".
6224: $uname." at ".$udom.": ".
6225: $tmp."</font>");
6226: } elsif ($tmp=~/error: 2 /) {
6227: #&EXT_cache_set($udom,$uname);
6228: &do_cache_new('userres',$hashid,undef,600);
6229: undef($tmp); # not really an error so don't send it back
6230: }
6231: return $tmp;
6232: }
6233: #----------------------------------------------- resdata - return resource data
6234: # Purpose:
6235: # Return resource data for either users or for a course.
6236: # Parameters:
6237: # $name - Course/user name.
6238: # $domain - Name of the domain the user/course is registered on.
6239: # $type - Type of thing $name is (must be 'course' or 'user'
6240: # @which - Array of names of resources desired.
6241: # Returns:
6242: # The value of the first reasource in @which that is found in the
6243: # resource hash.
6244: # Exceptional Conditions:
6245: # If the $type passed in is not valid (not the string 'course' or
6246: # 'user', an undefined reference is returned.
6247: # If none of the resources are found, an undef is returned
6248: sub resdata {
6249: my ($name,$domain,$type,@which)=@_;
6250: my $result;
6251: if ($type eq 'course') {
6252: $result=&get_courseresdata($name,$domain);
6253: } elsif ($type eq 'user') {
6254: $result=&get_userresdata($name,$domain);
6255: }
6256: if (!ref($result)) { return $result; }
6257: foreach my $item (@which) {
6258: if (defined($result->{$item})) {
6259: return $result->{$item};
6260: }
6261: }
6262: return undef;
6263: }
6264:
6265: #
6266: # EXT resource caching routines
6267: #
6268:
6269: sub clear_EXT_cache_status {
6270: &delenv('cache.EXT.');
6271: }
6272:
6273: sub EXT_cache_status {
6274: my ($target_domain,$target_user) = @_;
6275: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
6276: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
6277: # We know already the user has no data
6278: return 1;
6279: } else {
6280: return 0;
6281: }
6282: }
6283:
6284: sub EXT_cache_set {
6285: my ($target_domain,$target_user) = @_;
6286: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
6287: #&appenv($cachename => time);
6288: }
6289:
6290: # --------------------------------------------------------- Value of a Variable
6291: sub EXT {
6292:
6293: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
6294: unless ($varname) { return ''; }
6295: #get real user name/domain, courseid and symb
6296: my $courseid;
6297: my $publicuser;
6298: if ($symbparm) {
6299: $symbparm=&get_symb_from_alias($symbparm);
6300: }
6301: if (!($uname && $udom)) {
6302: (my $cursymb,$courseid,$udom,$uname,$publicuser)= &whichuser($symbparm);
6303: if (!$symbparm) { $symbparm=$cursymb; }
6304: } else {
6305: $courseid=$env{'request.course.id'};
6306: }
6307: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
6308: my $rest;
6309: if (defined($therest[0])) {
6310: $rest=join('.',@therest);
6311: } else {
6312: $rest='';
6313: }
6314:
6315: my $qualifierrest=$qualifier;
6316: if ($rest) { $qualifierrest.='.'.$rest; }
6317: my $spacequalifierrest=$space;
6318: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
6319: if ($realm eq 'user') {
6320: # --------------------------------------------------------------- user.resource
6321: if ($space eq 'resource') {
6322: if ( (defined($Apache::lonhomework::parsing_a_problem)
6323: || defined($Apache::lonhomework::parsing_a_task))
6324: &&
6325: ($symbparm eq &symbread()) ) {
6326: # if we are in the middle of processing the resource the
6327: # get the value we are planning on committing
6328: if (defined($Apache::lonhomework::results{$qualifierrest})) {
6329: return $Apache::lonhomework::results{$qualifierrest};
6330: } else {
6331: return $Apache::lonhomework::history{$qualifierrest};
6332: }
6333: } else {
6334: my %restored;
6335: if ($publicuser || $env{'request.state'} eq 'construct') {
6336: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
6337: } else {
6338: %restored=&restore($symbparm,$courseid,$udom,$uname);
6339: }
6340: return $restored{$qualifierrest};
6341: }
6342: # ----------------------------------------------------------------- user.access
6343: } elsif ($space eq 'access') {
6344: # FIXME - not supporting calls for a specific user
6345: return &allowed($qualifier,$rest);
6346: # ------------------------------------------ user.preferences, user.environment
6347: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
6348: if (($uname eq $env{'user.name'}) &&
6349: ($udom eq $env{'user.domain'})) {
6350: return $env{join('.',('environment',$qualifierrest))};
6351: } else {
6352: my %returnhash;
6353: if (!$publicuser) {
6354: %returnhash=&userenvironment($udom,$uname,
6355: $qualifierrest);
6356: }
6357: return $returnhash{$qualifierrest};
6358: }
6359: # ----------------------------------------------------------------- user.course
6360: } elsif ($space eq 'course') {
6361: # FIXME - not supporting calls for a specific user
6362: return $env{join('.',('request.course',$qualifier))};
6363: # ------------------------------------------------------------------- user.role
6364: } elsif ($space eq 'role') {
6365: # FIXME - not supporting calls for a specific user
6366: my ($role,$where)=split(/\./,$env{'request.role'});
6367: if ($qualifier eq 'value') {
6368: return $role;
6369: } elsif ($qualifier eq 'extent') {
6370: return $where;
6371: }
6372: # ----------------------------------------------------------------- user.domain
6373: } elsif ($space eq 'domain') {
6374: return $udom;
6375: # ------------------------------------------------------------------- user.name
6376: } elsif ($space eq 'name') {
6377: return $uname;
6378: # ---------------------------------------------------- Any other user namespace
6379: } else {
6380: my %reply;
6381: if (!$publicuser) {
6382: %reply=&get($space,[$qualifierrest],$udom,$uname);
6383: }
6384: return $reply{$qualifierrest};
6385: }
6386: } elsif ($realm eq 'query') {
6387: # ---------------------------------------------- pull stuff out of query string
6388: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
6389: [$spacequalifierrest]);
6390: return $env{'form.'.$spacequalifierrest};
6391: } elsif ($realm eq 'request') {
6392: # ------------------------------------------------------------- request.browser
6393: if ($space eq 'browser') {
6394: if ($qualifier eq 'textremote') {
6395: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
6396: return 1;
6397: } else {
6398: return 0;
6399: }
6400: } else {
6401: return $env{'browser.'.$qualifier};
6402: }
6403: # ------------------------------------------------------------ request.filename
6404: } else {
6405: return $env{'request.'.$spacequalifierrest};
6406: }
6407: } elsif ($realm eq 'course') {
6408: # ---------------------------------------------------------- course.description
6409: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
6410: } elsif ($realm eq 'resource') {
6411:
6412: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
6413: if (!$symbparm) { $symbparm=&symbread(); }
6414: }
6415:
6416: if ($space eq 'title') {
6417: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
6418: return &gettitle($symbparm);
6419: }
6420:
6421: if ($space eq 'map') {
6422: my ($map) = &decode_symb($symbparm);
6423: return &symbread($map);
6424: }
6425: if ($space eq 'filename') {
6426: if ($symbparm) {
6427: return &clutter((&decode_symb($symbparm))[2]);
6428: }
6429: return &hreflocation('',$env{'request.filename'});
6430: }
6431:
6432: my ($section, $group, @groups);
6433: my ($courselevelm,$courselevel);
6434: if ($symbparm && defined($courseid) &&
6435: $courseid eq $env{'request.course.id'}) {
6436:
6437: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
6438:
6439: # ----------------------------------------------------- Cascading lookup scheme
6440: my $symbp=$symbparm;
6441: my $mapp=&deversion((&decode_symb($symbp))[0]);
6442:
6443: my $symbparm=$symbp.'.'.$spacequalifierrest;
6444: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
6445:
6446: if (($env{'user.name'} eq $uname) &&
6447: ($env{'user.domain'} eq $udom)) {
6448: $section=$env{'request.course.sec'};
6449: @groups = split(/:/,$env{'request.course.groups'});
6450: @groups=&sort_course_groups($courseid,@groups);
6451: } else {
6452: if (! defined($usection)) {
6453: $section=&getsection($udom,$uname,$courseid);
6454: } else {
6455: $section = $usection;
6456: }
6457: @groups = &get_users_groups($udom,$uname,$courseid);
6458: }
6459:
6460: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
6461: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
6462: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
6463:
6464: $courselevel=$courseid.'.'.$spacequalifierrest;
6465: my $courselevelr=$courseid.'.'.$symbparm;
6466: $courselevelm=$courseid.'.'.$mapparm;
6467:
6468: # ----------------------------------------------------------- first, check user
6469:
6470: my $userreply=&resdata($uname,$udom,'user',
6471: ($courselevelr,$courselevelm,
6472: $courselevel));
6473: if (defined($userreply)) { return $userreply; }
6474:
6475: # ------------------------------------------------ second, check some of course
6476: my $coursereply;
6477: if (@groups > 0) {
6478: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
6479: $mapparm,$spacequalifierrest);
6480: if (defined($coursereply)) { return $coursereply; }
6481: }
6482:
6483: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
6484: $env{'course.'.$courseid.'.domain'},
6485: 'course',
6486: ($seclevelr,$seclevelm,$seclevel,
6487: $courselevelr));
6488: if (defined($coursereply)) { return $coursereply; }
6489:
6490: # ------------------------------------------------------ third, check map parms
6491: my %parmhash=();
6492: my $thisparm='';
6493: if (tie(%parmhash,'GDBM_File',
6494: $env{'request.course.fn'}.'_parms.db',
6495: &GDBM_READER(),0640)) {
6496: $thisparm=$parmhash{$symbparm};
6497: untie(%parmhash);
6498: }
6499: if ($thisparm) { return $thisparm; }
6500: }
6501: # ------------------------------------------ fourth, look in resource metadata
6502:
6503: $spacequalifierrest=~s/\./\_/;
6504: my $filename;
6505: if (!$symbparm) { $symbparm=&symbread(); }
6506: if ($symbparm) {
6507: $filename=(&decode_symb($symbparm))[2];
6508: } else {
6509: $filename=$env{'request.filename'};
6510: }
6511: my $metadata=&metadata($filename,$spacequalifierrest);
6512: if (defined($metadata)) { return $metadata; }
6513: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
6514: if (defined($metadata)) { return $metadata; }
6515:
6516: # ---------------------------------------------- fourth, look in rest pf course
6517: if ($symbparm && defined($courseid) &&
6518: $courseid eq $env{'request.course.id'}) {
6519: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
6520: $env{'course.'.$courseid.'.domain'},
6521: 'course',
6522: ($courselevelm,$courselevel));
6523: if (defined($coursereply)) { return $coursereply; }
6524: }
6525: # ------------------------------------------------------------------ Cascade up
6526: unless ($space eq '0') {
6527: my @parts=split(/_/,$space);
6528: my $id=pop(@parts);
6529: my $part=join('_',@parts);
6530: if ($part eq '') { $part='0'; }
6531: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
6532: $symbparm,$udom,$uname,$section,1);
6533: if (defined($partgeneral)) { return $partgeneral; }
6534: }
6535: if ($recurse) { return undef; }
6536: my $pack_def=&packages_tab_default($filename,$varname);
6537: if (defined($pack_def)) { return $pack_def; }
6538:
6539: # ---------------------------------------------------- Any other user namespace
6540: } elsif ($realm eq 'environment') {
6541: # ----------------------------------------------------------------- environment
6542: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
6543: return $env{'environment.'.$spacequalifierrest};
6544: } else {
6545: if ($uname eq 'anonymous' && $udom eq '') {
6546: return '';
6547: }
6548: my %returnhash=&userenvironment($udom,$uname,
6549: $spacequalifierrest);
6550: return $returnhash{$spacequalifierrest};
6551: }
6552: } elsif ($realm eq 'system') {
6553: # ----------------------------------------------------------------- system.time
6554: if ($space eq 'time') {
6555: return time;
6556: }
6557: } elsif ($realm eq 'server') {
6558: # ----------------------------------------------------------------- system.time
6559: if ($space eq 'name') {
6560: return $ENV{'SERVER_NAME'};
6561: }
6562: }
6563: return '';
6564: }
6565:
6566: sub check_group_parms {
6567: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
6568: my @groupitems = ();
6569: my $resultitem;
6570: my @levels = ($symbparm,$mapparm,$what);
6571: foreach my $group (@{$groups}) {
6572: foreach my $level (@levels) {
6573: my $item = $courseid.'.['.$group.'].'.$level;
6574: push(@groupitems,$item);
6575: }
6576: }
6577: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
6578: $env{'course.'.$courseid.'.domain'},
6579: 'course',@groupitems);
6580: return $coursereply;
6581: }
6582:
6583: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
6584: my ($courseid,@groups) = @_;
6585: @groups = sort(@groups);
6586: return @groups;
6587: }
6588:
6589: sub packages_tab_default {
6590: my ($uri,$varname)=@_;
6591: my (undef,$part,$name)=split(/\./,$varname);
6592:
6593: my (@extension,@specifics,$do_default);
6594: foreach my $package (split(/,/,&metadata($uri,'packages'))) {
6595: my ($pack_type,$pack_part)=split(/_/,$package,2);
6596: if ($pack_type eq 'default') {
6597: $do_default=1;
6598: } elsif ($pack_type eq 'extension') {
6599: push(@extension,[$package,$pack_type,$pack_part]);
6600: } elsif ($pack_part eq $part || $pack_type eq 'part') {
6601: # only look at packages defaults for packages that this id is
6602: push(@specifics,[$package,$pack_type,$pack_part]);
6603: }
6604: }
6605: # first look for a package that matches the requested part id
6606: foreach my $package (@specifics) {
6607: my (undef,$pack_type,$pack_part)=@{$package};
6608: next if ($pack_part ne $part);
6609: if (defined($packagetab{"$pack_type&$name&default"})) {
6610: return $packagetab{"$pack_type&$name&default"};
6611: }
6612: }
6613: # look for any possible matching non extension_ package
6614: foreach my $package (@specifics) {
6615: my (undef,$pack_type,$pack_part)=@{$package};
6616: if (defined($packagetab{"$pack_type&$name&default"})) {
6617: return $packagetab{"$pack_type&$name&default"};
6618: }
6619: if ($pack_type eq 'part') { $pack_part='0'; }
6620: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
6621: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
6622: }
6623: }
6624: # look for any posible extension_ match
6625: foreach my $package (@extension) {
6626: my ($package,$pack_type)=@{$package};
6627: if (defined($packagetab{"$pack_type&$name&default"})) {
6628: return $packagetab{"$pack_type&$name&default"};
6629: }
6630: if (defined($packagetab{$package."&$name&default"})) {
6631: return $packagetab{$package."&$name&default"};
6632: }
6633: }
6634: # look for a global default setting
6635: if ($do_default && defined($packagetab{"default&$name&default"})) {
6636: return $packagetab{"default&$name&default"};
6637: }
6638: return undef;
6639: }
6640:
6641: sub add_prefix_and_part {
6642: my ($prefix,$part)=@_;
6643: my $keyroot;
6644: if (defined($prefix) && $prefix !~ /^__/) {
6645: # prefix that has a part already
6646: $keyroot=$prefix;
6647: } elsif (defined($prefix)) {
6648: # prefix that is missing a part
6649: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
6650: } else {
6651: # no prefix at all
6652: if (defined($part)) { $keyroot='_'.$part; }
6653: }
6654: return $keyroot;
6655: }
6656:
6657: # ---------------------------------------------------------------- Get metadata
6658:
6659: my %metaentry;
6660: sub metadata {
6661: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
6662: $uri=&declutter($uri);
6663: # if it is a non metadata possible uri return quickly
6664: if (($uri eq '') ||
6665: (($uri =~ m|^/*adm/|) &&
6666: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
6667: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
6668: ($uri =~ m|home/$match_username/public_html/|)) {
6669: return undef;
6670: }
6671: my $filename=$uri;
6672: $uri=~s/\.meta$//;
6673: #
6674: # Is the metadata already cached?
6675: # Look at timestamp of caching
6676: # Everything is cached by the main uri, libraries are never directly cached
6677: #
6678: if (!defined($liburi)) {
6679: my ($result,$cached)=&is_cached_new('meta',$uri);
6680: if (defined($cached)) { return $result->{':'.$what}; }
6681: }
6682: {
6683: #
6684: # Is this a recursive call for a library?
6685: #
6686: # if (! exists($metacache{$uri})) {
6687: # $metacache{$uri}={};
6688: # }
6689: if ($liburi) {
6690: $liburi=&declutter($liburi);
6691: $filename=$liburi;
6692: } else {
6693: &devalidate_cache_new('meta',$uri);
6694: undef(%metaentry);
6695: }
6696: my %metathesekeys=();
6697: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
6698: my $metastring;
6699: if ($uri !~ m -^(editupload)/-) {
6700: my $file=&filelocation('',&clutter($filename));
6701: #push(@{$metaentry{$uri.'.file'}},$file);
6702: $metastring=&getfile($file);
6703: }
6704: my $parser=HTML::LCParser->new(\$metastring);
6705: my $token;
6706: undef %metathesekeys;
6707: while ($token=$parser->get_token) {
6708: if ($token->[0] eq 'S') {
6709: if (defined($token->[2]->{'package'})) {
6710: #
6711: # This is a package - get package info
6712: #
6713: my $package=$token->[2]->{'package'};
6714: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6715: if (defined($token->[2]->{'id'})) {
6716: $keyroot.='_'.$token->[2]->{'id'};
6717: }
6718: if ($metaentry{':packages'}) {
6719: $metaentry{':packages'}.=','.$package.$keyroot;
6720: } else {
6721: $metaentry{':packages'}=$package.$keyroot;
6722: }
6723: foreach my $pack_entry (keys(%packagetab)) {
6724: my $part=$keyroot;
6725: $part=~s/^\_//;
6726: if ($pack_entry=~/^\Q$package\E\&/ ||
6727: $pack_entry=~/^\Q$package\E_0\&/) {
6728: my ($pack,$name,$subp)=split(/\&/,$pack_entry);
6729: # ignore package.tab specified default values
6730: # here &package_tab_default() will fetch those
6731: if ($subp eq 'default') { next; }
6732: my $value=$packagetab{$pack_entry};
6733: my $unikey;
6734: if ($pack =~ /_0$/) {
6735: $unikey='parameter_0_'.$name;
6736: $part=0;
6737: } else {
6738: $unikey='parameter'.$keyroot.'_'.$name;
6739: }
6740: if ($subp eq 'display') {
6741: $value.=' [Part: '.$part.']';
6742: }
6743: $metaentry{':'.$unikey.'.part'}=$part;
6744: $metathesekeys{$unikey}=1;
6745: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6746: $metaentry{':'.$unikey.'.'.$subp}=$value;
6747: }
6748: if (defined($metaentry{':'.$unikey.'.default'})) {
6749: $metaentry{':'.$unikey}=
6750: $metaentry{':'.$unikey.'.default'};
6751: }
6752: }
6753: }
6754: } else {
6755: #
6756: # This is not a package - some other kind of start tag
6757: #
6758: my $entry=$token->[1];
6759: my $unikey;
6760: if ($entry eq 'import') {
6761: $unikey='';
6762: } else {
6763: $unikey=$entry;
6764: }
6765: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6766:
6767: if (defined($token->[2]->{'id'})) {
6768: $unikey.='_'.$token->[2]->{'id'};
6769: }
6770:
6771: if ($entry eq 'import') {
6772: #
6773: # Importing a library here
6774: #
6775: if ($depthcount<20) {
6776: my $location=$parser->get_text('/import');
6777: my $dir=$filename;
6778: $dir=~s|[^/]*$||;
6779: $location=&filelocation($dir,$location);
6780: my $metadata =
6781: &metadata($uri,'keys', $location,$unikey,
6782: $depthcount+1);
6783: foreach my $meta (split(',',$metadata)) {
6784: $metaentry{':'.$meta}=$metaentry{':'.$meta};
6785: $metathesekeys{$meta}=1;
6786: }
6787: }
6788: } else {
6789:
6790: if (defined($token->[2]->{'name'})) {
6791: $unikey.='_'.$token->[2]->{'name'};
6792: }
6793: $metathesekeys{$unikey}=1;
6794: foreach my $param (@{$token->[3]}) {
6795: $metaentry{':'.$unikey.'.'.$param} =
6796: $token->[2]->{$param};
6797: }
6798: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
6799: my $default=$metaentry{':'.$unikey.'.default'};
6800: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
6801: # only ws inside the tag, and not in default, so use default
6802: # as value
6803: $metaentry{':'.$unikey}=$default;
6804: } elsif ( $internaltext =~ /\S/ ) {
6805: # something interesting inside the tag
6806: $metaentry{':'.$unikey}=$internaltext;
6807: } else {
6808: # no interesting values, don't set a default
6809: }
6810: # end of not-a-package not-a-library import
6811: }
6812: # end of not-a-package start tag
6813: }
6814: # the next is the end of "start tag"
6815: }
6816: }
6817: my ($extension) = ($uri =~ /\.(\w+)$/);
6818: $extension = lc($extension);
6819: if ($extension eq 'htm') { $extension='html'; }
6820:
6821: foreach my $key (keys(%packagetab)) {
6822: #no specific packages #how's our extension
6823: if ($key!~/^extension_\Q$extension\E&/) { next; }
6824: &metadata_create_package_def($uri,$key,'extension_'.$extension,
6825: \%metathesekeys);
6826: }
6827:
6828: if (!exists($metaentry{':packages'})
6829: || $packagetab{"import_defaults&extension_$extension"}) {
6830: foreach my $key (keys(%packagetab)) {
6831: #no specific packages well let's get default then
6832: if ($key!~/^default&/) { next; }
6833: &metadata_create_package_def($uri,$key,'default',
6834: \%metathesekeys);
6835: }
6836: }
6837: # are there custom rights to evaluate
6838: if ($metaentry{':copyright'} eq 'custom') {
6839:
6840: #
6841: # Importing a rights file here
6842: #
6843: unless ($depthcount) {
6844: my $location=$metaentry{':customdistributionfile'};
6845: my $dir=$filename;
6846: $dir=~s|[^/]*$||;
6847: $location=&filelocation($dir,$location);
6848: my $rights_metadata =
6849: &metadata($uri,'keys',$location,'_rights',
6850: $depthcount+1);
6851: foreach my $rights (split(',',$rights_metadata)) {
6852: #$metaentry{':'.$rights}=$metacache{$uri}->{':'.$rights};
6853: $metathesekeys{$rights}=1;
6854: }
6855: }
6856: }
6857: # uniqifiy package listing
6858: my %seen;
6859: my @uniq_packages =
6860: grep { ! $seen{$_} ++ } (split(',',$metaentry{':packages'}));
6861: $metaentry{':packages'} = join(',',@uniq_packages);
6862:
6863: $metaentry{':keys'} = join(',',keys(%metathesekeys));
6864: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
6865: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
6866: &do_cache_new('meta',$uri,\%metaentry,60*60);
6867: # this is the end of "was not already recently cached
6868: }
6869: return $metaentry{':'.$what};
6870: }
6871:
6872: sub metadata_create_package_def {
6873: my ($uri,$key,$package,$metathesekeys)=@_;
6874: my ($pack,$name,$subp)=split(/\&/,$key);
6875: if ($subp eq 'default') { next; }
6876:
6877: if (defined($metaentry{':packages'})) {
6878: $metaentry{':packages'}.=','.$package;
6879: } else {
6880: $metaentry{':packages'}=$package;
6881: }
6882: my $value=$packagetab{$key};
6883: my $unikey;
6884: $unikey='parameter_0_'.$name;
6885: $metaentry{':'.$unikey.'.part'}=0;
6886: $$metathesekeys{$unikey}=1;
6887: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6888: $metaentry{':'.$unikey.'.'.$subp}=$value;
6889: }
6890: if (defined($metaentry{':'.$unikey.'.default'})) {
6891: $metaentry{':'.$unikey}=
6892: $metaentry{':'.$unikey.'.default'};
6893: }
6894: }
6895:
6896: sub metadata_generate_part0 {
6897: my ($metadata,$metacache,$uri) = @_;
6898: my %allnames;
6899: foreach my $metakey (keys(%$metadata)) {
6900: if ($metakey=~/^parameter\_(.*)/) {
6901: my $part=$$metacache{':'.$metakey.'.part'};
6902: my $name=$$metacache{':'.$metakey.'.name'};
6903: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
6904: $allnames{$name}=$part;
6905: }
6906: }
6907: }
6908: foreach my $name (keys(%allnames)) {
6909: $$metadata{"parameter_0_$name"}=1;
6910: my $key=":parameter_0_$name";
6911: $$metacache{"$key.part"}='0';
6912: $$metacache{"$key.name"}=$name;
6913: $$metacache{"$key.type"}=$$metacache{':parameter_'.
6914: $allnames{$name}.'_'.$name.
6915: '.type'};
6916: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
6917: '.display'};
6918: my $expr='[Part: '.$allnames{$name}.']';
6919: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
6920: $$metacache{"$key.display"}=$olddis;
6921: }
6922: }
6923:
6924: # ------------------------------------------------------ Devalidate title cache
6925:
6926: sub devalidate_title_cache {
6927: my ($url)=@_;
6928: if (!$env{'request.course.id'}) { return; }
6929: my $symb=&symbread($url);
6930: if (!$symb) { return; }
6931: my $key=$env{'request.course.id'}."\0".$symb;
6932: &devalidate_cache_new('title',$key);
6933: }
6934:
6935: # ------------------------------------------------- Get the title of a resource
6936:
6937: sub gettitle {
6938: my $urlsymb=shift;
6939: my $symb=&symbread($urlsymb);
6940: if ($symb) {
6941: my $key=$env{'request.course.id'}."\0".$symb;
6942: my ($result,$cached)=&is_cached_new('title',$key);
6943: if (defined($cached)) {
6944: return $result;
6945: }
6946: my ($map,$resid,$url)=&decode_symb($symb);
6947: my $title='';
6948: if (!$map && $resid == 0 && $url =~/default\.sequence$/) {
6949: $title = $env{'course.'.$env{'request.course.id'}.'.description'};
6950: } else {
6951: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6952: &GDBM_READER(),0640)) {
6953: my $mapid=$bighash{'map_pc_'.&clutter($map)};
6954: $title=$bighash{'title_'.$mapid.'.'.$resid};
6955: untie(%bighash);
6956: }
6957: }
6958: $title=~s/\&colon\;/\:/gs;
6959: if ($title) {
6960: return &do_cache_new('title',$key,$title,600);
6961: }
6962: $urlsymb=$url;
6963: }
6964: my $title=&metadata($urlsymb,'title');
6965: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
6966: return $title;
6967: }
6968:
6969: sub get_slot {
6970: my ($which,$cnum,$cdom)=@_;
6971: if (!$cnum || !$cdom) {
6972: (undef,my $courseid)=&whichuser();
6973: $cdom=$env{'course.'.$courseid.'.domain'};
6974: $cnum=$env{'course.'.$courseid.'.num'};
6975: }
6976: my $key=join("\0",'slots',$cdom,$cnum,$which);
6977: my %slotinfo;
6978: if (exists($remembered{$key})) {
6979: $slotinfo{$which} = $remembered{$key};
6980: } else {
6981: %slotinfo=&get('slots',[$which],$cdom,$cnum);
6982: &Apache::lonhomework::showhash(%slotinfo);
6983: my ($tmp)=keys(%slotinfo);
6984: if ($tmp=~/^error:/) { return (); }
6985: $remembered{$key} = $slotinfo{$which};
6986: }
6987: if (ref($slotinfo{$which}) eq 'HASH') {
6988: return %{$slotinfo{$which}};
6989: }
6990: return $slotinfo{$which};
6991: }
6992: # ------------------------------------------------- Update symbolic store links
6993:
6994: sub symblist {
6995: my ($mapname,%newhash)=@_;
6996: $mapname=&deversion(&declutter($mapname));
6997: my %hash;
6998: if (($env{'request.course.fn'}) && (%newhash)) {
6999: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
7000: &GDBM_WRCREAT(),0640)) {
7001: foreach my $url (keys %newhash) {
7002: next if ($url eq 'last_known'
7003: && $env{'form.no_update_last_known'});
7004: $hash{declutter($url)}=&encode_symb($mapname,
7005: $newhash{$url}->[1],
7006: $newhash{$url}->[0]);
7007: }
7008: if (untie(%hash)) {
7009: return 'ok';
7010: }
7011: }
7012: }
7013: return 'error';
7014: }
7015:
7016: # --------------------------------------------------------------- Verify a symb
7017:
7018: sub symbverify {
7019: my ($symb,$thisurl)=@_;
7020: my $thisfn=$thisurl;
7021: $thisfn=&declutter($thisfn);
7022: # direct jump to resource in page or to a sequence - will construct own symbs
7023: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
7024: # check URL part
7025: my ($map,$resid,$url)=&decode_symb($symb);
7026:
7027: unless ($url eq $thisfn) { return 0; }
7028:
7029: $symb=&symbclean($symb);
7030: $thisurl=&deversion($thisurl);
7031: $thisfn=&deversion($thisfn);
7032:
7033: my %bighash;
7034: my $okay=0;
7035:
7036: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
7037: &GDBM_READER(),0640)) {
7038: my $ids=$bighash{'ids_'.&clutter($thisurl)};
7039: unless ($ids) {
7040: $ids=$bighash{'ids_/'.$thisurl};
7041: }
7042: if ($ids) {
7043: # ------------------------------------------------------------------- Has ID(s)
7044: foreach my $id (split(/\,/,$ids)) {
7045: my ($mapid,$resid)=split(/\./,$id);
7046: if (
7047: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
7048: eq $symb) {
7049: if (($env{'request.role.adv'}) ||
7050: $bighash{'encrypted_'.$id} eq $env{'request.enc'}) {
7051: $okay=1;
7052: }
7053: }
7054: }
7055: }
7056: untie(%bighash);
7057: }
7058: return $okay;
7059: }
7060:
7061: # --------------------------------------------------------------- Clean-up symb
7062:
7063: sub symbclean {
7064: my $symb=shift;
7065: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
7066: # remove version from map
7067: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
7068:
7069: # remove version from URL
7070: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
7071:
7072: # remove wrapper
7073:
7074: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
7075: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
7076: return $symb;
7077: }
7078:
7079: # ---------------------------------------------- Split symb to find map and url
7080:
7081: sub encode_symb {
7082: my ($map,$resid,$url)=@_;
7083: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
7084: }
7085:
7086: sub decode_symb {
7087: my $symb=shift;
7088: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
7089: my ($map,$resid,$url)=split(/___/,$symb);
7090: return (&fixversion($map),$resid,&fixversion($url));
7091: }
7092:
7093: sub fixversion {
7094: my $fn=shift;
7095: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
7096: my %bighash;
7097: my $uri=&clutter($fn);
7098: my $key=$env{'request.course.id'}.'_'.$uri;
7099: # is this cached?
7100: my ($result,$cached)=&is_cached_new('courseresversion',$key);
7101: if (defined($cached)) { return $result; }
7102: # unfortunately not cached, or expired
7103: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
7104: &GDBM_READER(),0640)) {
7105: if ($bighash{'version_'.$uri}) {
7106: my $version=$bighash{'version_'.$uri};
7107: unless (($version eq 'mostrecent') ||
7108: ($version==&getversion($uri))) {
7109: $uri=~s/\.(\w+)$/\.$version\.$1/;
7110: }
7111: }
7112: untie %bighash;
7113: }
7114: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
7115: }
7116:
7117: sub deversion {
7118: my $url=shift;
7119: $url=~s/\.\d+\.(\w+)$/\.$1/;
7120: return $url;
7121: }
7122:
7123: # ------------------------------------------------------ Return symb list entry
7124:
7125: sub symbread {
7126: my ($thisfn,$donotrecurse)=@_;
7127: my $cache_str='request.symbread.cached.'.$thisfn;
7128: if (defined($env{$cache_str})) { return $env{$cache_str}; }
7129: # no filename provided? try from environment
7130: unless ($thisfn) {
7131: if ($env{'request.symb'}) {
7132: return $env{$cache_str}=&symbclean($env{'request.symb'});
7133: }
7134: $thisfn=$env{'request.filename'};
7135: }
7136: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
7137: # is that filename actually a symb? Verify, clean, and return
7138: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
7139: if (&symbverify($thisfn,$1)) {
7140: return $env{$cache_str}=&symbclean($thisfn);
7141: }
7142: }
7143: $thisfn=declutter($thisfn);
7144: my %hash;
7145: my %bighash;
7146: my $syval='';
7147: if (($env{'request.course.fn'}) && ($thisfn)) {
7148: my $targetfn = $thisfn;
7149: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
7150: $targetfn = 'adm/wrapper/'.$thisfn;
7151: }
7152: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
7153: $targetfn=$1;
7154: }
7155: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
7156: &GDBM_READER(),0640)) {
7157: $syval=$hash{$targetfn};
7158: untie(%hash);
7159: }
7160: # ---------------------------------------------------------- There was an entry
7161: if ($syval) {
7162: #unless ($syval=~/\_\d+$/) {
7163: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
7164: #&appenv('request.ambiguous' => $thisfn);
7165: #return $env{$cache_str}='';
7166: #}
7167: #$syval.=$1;
7168: #}
7169: } else {
7170: # ------------------------------------------------------- Was not in symb table
7171: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
7172: &GDBM_READER(),0640)) {
7173: # ---------------------------------------------- Get ID(s) for current resource
7174: my $ids=$bighash{'ids_'.&clutter($thisfn)};
7175: unless ($ids) {
7176: $ids=$bighash{'ids_/'.$thisfn};
7177: }
7178: unless ($ids) {
7179: # alias?
7180: $ids=$bighash{'mapalias_'.$thisfn};
7181: }
7182: if ($ids) {
7183: # ------------------------------------------------------------------- Has ID(s)
7184: my @possibilities=split(/\,/,$ids);
7185: if ($#possibilities==0) {
7186: # ----------------------------------------------- There is only one possibility
7187: my ($mapid,$resid)=split(/\./,$ids);
7188: $syval=&encode_symb($bighash{'map_id_'.$mapid},
7189: $resid,$thisfn);
7190: } elsif (!$donotrecurse) {
7191: # ------------------------------------------ There is more than one possibility
7192: my $realpossible=0;
7193: foreach my $id (@possibilities) {
7194: my $file=$bighash{'src_'.$id};
7195: if (&allowed('bre',$file)) {
7196: my ($mapid,$resid)=split(/\./,$id);
7197: if ($bighash{'map_type_'.$mapid} ne 'page') {
7198: $realpossible++;
7199: $syval=&encode_symb($bighash{'map_id_'.$mapid},
7200: $resid,$thisfn);
7201: }
7202: }
7203: }
7204: if ($realpossible!=1) { $syval=''; }
7205: } else {
7206: $syval='';
7207: }
7208: }
7209: untie(%bighash)
7210: }
7211: }
7212: if ($syval) {
7213: return $env{$cache_str}=$syval;
7214: }
7215: }
7216: &appenv('request.ambiguous' => $thisfn);
7217: return $env{$cache_str}='';
7218: }
7219:
7220: # ---------------------------------------------------------- Return random seed
7221:
7222: sub numval {
7223: my $txt=shift;
7224: $txt=~tr/A-J/0-9/;
7225: $txt=~tr/a-j/0-9/;
7226: $txt=~tr/K-T/0-9/;
7227: $txt=~tr/k-t/0-9/;
7228: $txt=~tr/U-Z/0-5/;
7229: $txt=~tr/u-z/0-5/;
7230: $txt=~s/\D//g;
7231: if ($_64bit) { if ($txt > 2**32) { return -1; } }
7232: return int($txt);
7233: }
7234:
7235: sub numval2 {
7236: my $txt=shift;
7237: $txt=~tr/A-J/0-9/;
7238: $txt=~tr/a-j/0-9/;
7239: $txt=~tr/K-T/0-9/;
7240: $txt=~tr/k-t/0-9/;
7241: $txt=~tr/U-Z/0-5/;
7242: $txt=~tr/u-z/0-5/;
7243: $txt=~s/\D//g;
7244: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
7245: my $total;
7246: foreach my $val (@txts) { $total+=$val; }
7247: if ($_64bit) { if ($total > 2**32) { return -1; } }
7248: return int($total);
7249: }
7250:
7251: sub numval3 {
7252: use integer;
7253: my $txt=shift;
7254: $txt=~tr/A-J/0-9/;
7255: $txt=~tr/a-j/0-9/;
7256: $txt=~tr/K-T/0-9/;
7257: $txt=~tr/k-t/0-9/;
7258: $txt=~tr/U-Z/0-5/;
7259: $txt=~tr/u-z/0-5/;
7260: $txt=~s/\D//g;
7261: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
7262: my $total;
7263: foreach my $val (@txts) { $total+=$val; }
7264: if ($_64bit) { $total=(($total<<32)>>32); }
7265: return $total;
7266: }
7267:
7268: sub digest {
7269: my ($data)=@_;
7270: my $digest=&Digest::MD5::md5($data);
7271: my ($a,$b,$c,$d)=unpack("iiii",$digest);
7272: my ($e,$f);
7273: {
7274: use integer;
7275: $e=($a+$b);
7276: $f=($c+$d);
7277: if ($_64bit) {
7278: $e=(($e<<32)>>32);
7279: $f=(($f<<32)>>32);
7280: }
7281: }
7282: if (wantarray) {
7283: return ($e,$f);
7284: } else {
7285: my $g;
7286: {
7287: use integer;
7288: $g=($e+$f);
7289: if ($_64bit) {
7290: $g=(($g<<32)>>32);
7291: }
7292: }
7293: return $g;
7294: }
7295: }
7296:
7297: sub latest_rnd_algorithm_id {
7298: return '64bit5';
7299: }
7300:
7301: sub get_rand_alg {
7302: my ($courseid)=@_;
7303: if (!$courseid) { $courseid=(&whichuser())[1]; }
7304: if ($courseid) {
7305: return $env{"course.$courseid.rndseed"};
7306: }
7307: return &latest_rnd_algorithm_id();
7308: }
7309:
7310: sub validCODE {
7311: my ($CODE)=@_;
7312: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
7313: return 0;
7314: }
7315:
7316: sub getCODE {
7317: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
7318: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
7319: defined($Apache::lonhomework::parsing_a_task) ) &&
7320: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
7321: return $Apache::lonhomework::history{'resource.CODE'};
7322: }
7323: return undef;
7324: }
7325:
7326: sub rndseed {
7327: my ($symb,$courseid,$domain,$username)=@_;
7328: my ($wsymb,$wcourseid,$wdomain,$wusername)=&whichuser();
7329: if (!defined($symb)) {
7330: unless ($symb=$wsymb) { return time; }
7331: }
7332: if (!$courseid) { $courseid=$wcourseid; }
7333: if (!$domain) { $domain=$wdomain; }
7334: if (!$username) { $username=$wusername }
7335: my $which=&get_rand_alg();
7336:
7337: if (defined(&getCODE())) {
7338: if ($which eq '64bit5') {
7339: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
7340: } elsif ($which eq '64bit4') {
7341: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
7342: } else {
7343: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
7344: }
7345: } elsif ($which eq '64bit5') {
7346: return &rndseed_64bit5($symb,$courseid,$domain,$username);
7347: } elsif ($which eq '64bit4') {
7348: return &rndseed_64bit4($symb,$courseid,$domain,$username);
7349: } elsif ($which eq '64bit3') {
7350: return &rndseed_64bit3($symb,$courseid,$domain,$username);
7351: } elsif ($which eq '64bit2') {
7352: return &rndseed_64bit2($symb,$courseid,$domain,$username);
7353: } elsif ($which eq '64bit') {
7354: return &rndseed_64bit($symb,$courseid,$domain,$username);
7355: }
7356: return &rndseed_32bit($symb,$courseid,$domain,$username);
7357: }
7358:
7359: sub rndseed_32bit {
7360: my ($symb,$courseid,$domain,$username)=@_;
7361: {
7362: use integer;
7363: my $symbchck=unpack("%32C*",$symb) << 27;
7364: my $symbseed=numval($symb) << 22;
7365: my $namechck=unpack("%32C*",$username) << 17;
7366: my $nameseed=numval($username) << 12;
7367: my $domainseed=unpack("%32C*",$domain) << 7;
7368: my $courseseed=unpack("%32C*",$courseid);
7369: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
7370: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7371: #&logthis("rndseed :$num:$symb");
7372: if ($_64bit) { $num=(($num<<32)>>32); }
7373: return $num;
7374: }
7375: }
7376:
7377: sub rndseed_64bit {
7378: my ($symb,$courseid,$domain,$username)=@_;
7379: {
7380: use integer;
7381: my $symbchck=unpack("%32S*",$symb) << 21;
7382: my $symbseed=numval($symb) << 10;
7383: my $namechck=unpack("%32S*",$username);
7384:
7385: my $nameseed=numval($username) << 21;
7386: my $domainseed=unpack("%32S*",$domain) << 10;
7387: my $courseseed=unpack("%32S*",$courseid);
7388:
7389: my $num1=$symbchck+$symbseed+$namechck;
7390: my $num2=$nameseed+$domainseed+$courseseed;
7391: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7392: #&logthis("rndseed :$num:$symb");
7393: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7394: return "$num1,$num2";
7395: }
7396: }
7397:
7398: sub rndseed_64bit2 {
7399: my ($symb,$courseid,$domain,$username)=@_;
7400: {
7401: use integer;
7402: # strings need to be an even # of cahracters long, it it is odd the
7403: # last characters gets thrown away
7404: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7405: my $symbseed=numval($symb) << 10;
7406: my $namechck=unpack("%32S*",$username.' ');
7407:
7408: my $nameseed=numval($username) << 21;
7409: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7410: my $courseseed=unpack("%32S*",$courseid.' ');
7411:
7412: my $num1=$symbchck+$symbseed+$namechck;
7413: my $num2=$nameseed+$domainseed+$courseseed;
7414: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7415: #&logthis("rndseed :$num:$symb");
7416: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7417: return "$num1,$num2";
7418: }
7419: }
7420:
7421: sub rndseed_64bit3 {
7422: my ($symb,$courseid,$domain,$username)=@_;
7423: {
7424: use integer;
7425: # strings need to be an even # of cahracters long, it it is odd the
7426: # last characters gets thrown away
7427: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7428: my $symbseed=numval2($symb) << 10;
7429: my $namechck=unpack("%32S*",$username.' ');
7430:
7431: my $nameseed=numval2($username) << 21;
7432: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7433: my $courseseed=unpack("%32S*",$courseid.' ');
7434:
7435: my $num1=$symbchck+$symbseed+$namechck;
7436: my $num2=$nameseed+$domainseed+$courseseed;
7437: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7438: #&logthis("rndseed :$num1:$num2:$_64bit");
7439: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7440:
7441: return "$num1:$num2";
7442: }
7443: }
7444:
7445: sub rndseed_64bit4 {
7446: my ($symb,$courseid,$domain,$username)=@_;
7447: {
7448: use integer;
7449: # strings need to be an even # of cahracters long, it it is odd the
7450: # last characters gets thrown away
7451: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7452: my $symbseed=numval3($symb) << 10;
7453: my $namechck=unpack("%32S*",$username.' ');
7454:
7455: my $nameseed=numval3($username) << 21;
7456: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7457: my $courseseed=unpack("%32S*",$courseid.' ');
7458:
7459: my $num1=$symbchck+$symbseed+$namechck;
7460: my $num2=$nameseed+$domainseed+$courseseed;
7461: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7462: #&logthis("rndseed :$num1:$num2:$_64bit");
7463: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7464:
7465: return "$num1:$num2";
7466: }
7467: }
7468:
7469: sub rndseed_64bit5 {
7470: my ($symb,$courseid,$domain,$username)=@_;
7471: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
7472: return "$num1:$num2";
7473: }
7474:
7475: sub rndseed_CODE_64bit {
7476: my ($symb,$courseid,$domain,$username)=@_;
7477: {
7478: use integer;
7479: my $symbchck=unpack("%32S*",$symb.' ') << 16;
7480: my $symbseed=numval2($symb);
7481: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
7482: my $CODEseed=numval(&getCODE());
7483: my $courseseed=unpack("%32S*",$courseid.' ');
7484: my $num1=$symbseed+$CODEchck;
7485: my $num2=$CODEseed+$courseseed+$symbchck;
7486: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
7487: #&logthis("rndseed :$num1:$num2:$symb");
7488: if ($_64bit) { $num1=(($num1<<32)>>32); }
7489: if ($_64bit) { $num2=(($num2<<32)>>32); }
7490: return "$num1:$num2";
7491: }
7492: }
7493:
7494: sub rndseed_CODE_64bit4 {
7495: my ($symb,$courseid,$domain,$username)=@_;
7496: {
7497: use integer;
7498: my $symbchck=unpack("%32S*",$symb.' ') << 16;
7499: my $symbseed=numval3($symb);
7500: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
7501: my $CODEseed=numval3(&getCODE());
7502: my $courseseed=unpack("%32S*",$courseid.' ');
7503: my $num1=$symbseed+$CODEchck;
7504: my $num2=$CODEseed+$courseseed+$symbchck;
7505: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
7506: #&logthis("rndseed :$num1:$num2:$symb");
7507: if ($_64bit) { $num1=(($num1<<32)>>32); }
7508: if ($_64bit) { $num2=(($num2<<32)>>32); }
7509: return "$num1:$num2";
7510: }
7511: }
7512:
7513: sub rndseed_CODE_64bit5 {
7514: my ($symb,$courseid,$domain,$username)=@_;
7515: my $code = &getCODE();
7516: my ($num1,$num2)=&digest("$symb,$courseid,$code");
7517: return "$num1:$num2";
7518: }
7519:
7520: sub setup_random_from_rndseed {
7521: my ($rndseed)=@_;
7522: if ($rndseed =~/([,:])/) {
7523: my ($num1,$num2)=split(/[,:]/,$rndseed);
7524: &Math::Random::random_set_seed(abs($num1),abs($num2));
7525: } else {
7526: &Math::Random::random_set_seed_from_phrase($rndseed);
7527: }
7528: }
7529:
7530: sub latest_receipt_algorithm_id {
7531: return 'receipt3';
7532: }
7533:
7534: sub recunique {
7535: my $fucourseid=shift;
7536: my $unique;
7537: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
7538: $env{"course.$fucourseid.receiptalg"} eq 'receipt3' ) {
7539: $unique=$env{"course.$fucourseid.internal.encseed"};
7540: } else {
7541: $unique=$perlvar{'lonReceipt'};
7542: }
7543: return unpack("%32C*",$unique);
7544: }
7545:
7546: sub recprefix {
7547: my $fucourseid=shift;
7548: my $prefix;
7549: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2'||
7550: $env{"course.$fucourseid.receiptalg"} eq 'receipt3' ) {
7551: $prefix=$env{"course.$fucourseid.internal.encpref"};
7552: } else {
7553: $prefix=$perlvar{'lonHostID'};
7554: }
7555: return unpack("%32C*",$prefix);
7556: }
7557:
7558: sub ireceipt {
7559: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
7560:
7561: my $return =&recprefix($fucourseid).'-';
7562:
7563: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt3' ||
7564: $env{'request.state'} eq 'construct') {
7565: $return .= (&digest("$funame,$fudom,$fucourseid,$fusymb,$part")%10000);
7566: return $return;
7567: }
7568:
7569: my $cuname=unpack("%32C*",$funame);
7570: my $cudom=unpack("%32C*",$fudom);
7571: my $cucourseid=unpack("%32C*",$fucourseid);
7572: my $cusymb=unpack("%32C*",$fusymb);
7573: my $cunique=&recunique($fucourseid);
7574: my $cpart=unpack("%32S*",$part);
7575: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
7576:
7577: #&logthis("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname)." and ".($cpart%$cudom));
7578:
7579: $return.= ($cunique%$cuname+
7580: $cunique%$cudom+
7581: $cusymb%$cuname+
7582: $cusymb%$cudom+
7583: $cucourseid%$cuname+
7584: $cucourseid%$cudom+
7585: $cpart%$cuname+
7586: $cpart%$cudom);
7587: } else {
7588: $return.= ($cunique%$cuname+
7589: $cunique%$cudom+
7590: $cusymb%$cuname+
7591: $cusymb%$cudom+
7592: $cucourseid%$cuname+
7593: $cucourseid%$cudom);
7594: }
7595: return $return;
7596: }
7597:
7598: sub receipt {
7599: my ($part)=@_;
7600: my ($symb,$courseid,$domain,$name) = &whichuser();
7601: return &ireceipt($name,$domain,$courseid,$symb,$part);
7602: }
7603:
7604: sub whichuser {
7605: my ($passedsymb)=@_;
7606: my ($symb,$courseid,$domain,$name,$publicuser);
7607: if (defined($env{'form.grade_symb'})) {
7608: my ($tmp_courseid)=&get_env_multiple('form.grade_courseid');
7609: my $allowed=&allowed('vgr',$tmp_courseid);
7610: if (!$allowed &&
7611: exists($env{'request.course.sec'}) &&
7612: $env{'request.course.sec'} !~ /^\s*$/) {
7613: $allowed=&allowed('vgr',$tmp_courseid.
7614: '/'.$env{'request.course.sec'});
7615: }
7616: if ($allowed) {
7617: ($symb)=&get_env_multiple('form.grade_symb');
7618: $courseid=$tmp_courseid;
7619: ($domain)=&get_env_multiple('form.grade_domain');
7620: ($name)=&get_env_multiple('form.grade_username');
7621: return ($symb,$courseid,$domain,$name,$publicuser);
7622: }
7623: }
7624: if (!$passedsymb) {
7625: $symb=&symbread();
7626: } else {
7627: $symb=$passedsymb;
7628: }
7629: $courseid=$env{'request.course.id'};
7630: $domain=$env{'user.domain'};
7631: $name=$env{'user.name'};
7632: if ($name eq 'public' && $domain eq 'public') {
7633: if (!defined($env{'form.username'})) {
7634: $env{'form.username'}.=time.rand(10000000);
7635: }
7636: $name.=$env{'form.username'};
7637: }
7638: return ($symb,$courseid,$domain,$name,$publicuser);
7639:
7640: }
7641:
7642: # ------------------------------------------------------------ Serves up a file
7643: # returns either the contents of the file or
7644: # -1 if the file doesn't exist
7645: #
7646: # if the target is a file that was uploaded via DOCS,
7647: # a check will be made to see if a current copy exists on the local server,
7648: # if it does this will be served, otherwise a copy will be retrieved from
7649: # the home server for the course and stored in /home/httpd/html/userfiles on
7650: # the local server.
7651:
7652: sub getfile {
7653: my ($file) = @_;
7654: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
7655: &repcopy($file);
7656: return &readfile($file);
7657: }
7658:
7659: sub repcopy_userfile {
7660: my ($file)=@_;
7661: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
7662: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
7663: my ($cdom,$cnum,$filename) =
7664: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+($match_domain)/+($match_name)/+(.*)|);
7665: my $uri="/uploaded/$cdom/$cnum/$filename";
7666: if (-e "$file") {
7667: # we already have a local copy, check it out
7668: my @fileinfo = stat($file);
7669: my $rtncode;
7670: my $info;
7671: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
7672: if ($lwpresp ne 'ok') {
7673: # there is no such file anymore, even though we had a local copy
7674: if ($rtncode eq '404') {
7675: unlink($file);
7676: }
7677: return -1;
7678: }
7679: if ($info < $fileinfo[9]) {
7680: # nice, the file we have is up-to-date, just say okay
7681: return 'ok';
7682: } else {
7683: # the file is outdated, get rid of it
7684: unlink($file);
7685: }
7686: }
7687: # one way or the other, at this point, we don't have the file
7688: # construct the correct path for the file
7689: my @parts = ($cdom,$cnum);
7690: if ($filename =~ m|^(.+)/[^/]+$|) {
7691: push @parts, split(/\//,$1);
7692: }
7693: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
7694: foreach my $part (@parts) {
7695: $path .= '/'.$part;
7696: if (!-e $path) {
7697: mkdir($path,0770);
7698: }
7699: }
7700: # now the path exists for sure
7701: # get a user agent
7702: my $ua=new LWP::UserAgent;
7703: my $transferfile=$file.'.in.transfer';
7704: # FIXME: this should flock
7705: if (-e $transferfile) { return 'ok'; }
7706: my $request;
7707: $uri=~s/^\///;
7708: $request=new HTTP::Request('GET','http://'.&hostname(&homeserver($cnum,$cdom)).'/raw/'.$uri);
7709: my $response=$ua->request($request,$transferfile);
7710: # did it work?
7711: if ($response->is_error()) {
7712: unlink($transferfile);
7713: &logthis("Userfile repcopy failed for $uri");
7714: return -1;
7715: }
7716: # worked, rename the transfer file
7717: rename($transferfile,$file);
7718: return 'ok';
7719: }
7720:
7721: sub tokenwrapper {
7722: my $uri=shift;
7723: $uri=~s|^http\://([^/]+)||;
7724: $uri=~s|^/||;
7725: $env{'user.environment'}=~/\/([^\/]+)\.id/;
7726: my $token=$1;
7727: my (undef,$udom,$uname,$file)=split('/',$uri,4);
7728: if ($udom && $uname && $file) {
7729: $file=~s|(\?\.*)*$||;
7730: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
7731: return 'http://'.&hostname(&homeserver($uname,$udom)).'/'.$uri.
7732: (($uri=~/\?/)?'&':'?').'token='.$token.
7733: '&tokenissued='.$perlvar{'lonHostID'};
7734: } else {
7735: return '/adm/notfound.html';
7736: }
7737: }
7738:
7739: # call with reqtype HEAD: get last modification time
7740: # call with reqtype GET: get the file contents
7741: # Do not call this with reqtype GET for large files! It loads everything into memory
7742: #
7743: sub getuploaded {
7744: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
7745: $uri=~s/^\///;
7746: $uri = 'http://'.&hostname(&homeserver($cnum,$cdom)).'/raw/'.$uri;
7747: my $ua=new LWP::UserAgent;
7748: my $request=new HTTP::Request($reqtype,$uri);
7749: my $response=$ua->request($request);
7750: $$rtncode = $response->code;
7751: if (! $response->is_success()) {
7752: return 'failed';
7753: }
7754: if ($reqtype eq 'HEAD') {
7755: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
7756: } elsif ($reqtype eq 'GET') {
7757: $$info = $response->content;
7758: }
7759: return 'ok';
7760: }
7761:
7762: sub readfile {
7763: my $file = shift;
7764: if ( (! -e $file ) || ($file eq '') ) { return -1; };
7765: my $fh;
7766: open($fh,"<$file");
7767: my $a='';
7768: while (my $line = <$fh>) { $a .= $line; }
7769: return $a;
7770: }
7771:
7772: sub filelocation {
7773: my ($dir,$file) = @_;
7774: my $location;
7775: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
7776:
7777: if ($file =~ m-^/adm/-) {
7778: $file=~s-^/adm/wrapper/-/-;
7779: $file=~s-^/adm/coursedocs/showdoc/-/-;
7780: }
7781:
7782: if ($file=~m:^/~:) { # is a contruction space reference
7783: $location = $file;
7784: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
7785: } elsif ($file=~m{^/home/$match_username/public_html/}) {
7786: # is a correct contruction space reference
7787: $location = $file;
7788: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
7789: my ($udom,$uname,$filename)=
7790: ($file=~m -^/+(?:uploaded|editupload)/+($match_domain)/+($match_name)/+(.*)$-);
7791: my $home=&homeserver($uname,$udom);
7792: my $is_me=0;
7793: my @ids=¤t_machine_ids();
7794: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
7795: if ($is_me) {
7796: $location=&propath($udom,$uname).
7797: '/userfiles/'.$filename;
7798: } else {
7799: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
7800: $udom.'/'.$uname.'/'.$filename;
7801: }
7802: } elsif ($file =~ m-^/adm/-) {
7803: $location = $perlvar{'lonDocRoot'}.'/'.$file;
7804: } else {
7805: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7806: $file=~s:^/res/:/:;
7807: if ( !( $file =~ m:^/:) ) {
7808: $location = $dir. '/'.$file;
7809: } else {
7810: $location = '/home/httpd/html/res'.$file;
7811: }
7812: }
7813: $location=~s://+:/:g; # remove duplicate /
7814: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
7815: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
7816: return $location;
7817: }
7818:
7819: sub hreflocation {
7820: my ($dir,$file)=@_;
7821: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
7822: $file=filelocation($dir,$file);
7823: } elsif ($file=~m-^/adm/-) {
7824: $file=~s-^/adm/wrapper/-/-;
7825: $file=~s-^/adm/coursedocs/showdoc/-/-;
7826: }
7827: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
7828: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
7829: } elsif ($file=~m-/home/($match_username)/public_html/-) {
7830: $file=~s-^/home/($match_username)/public_html/-/~$1/-;
7831: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
7832: $file=~s-^/home/httpd/lonUsers/($match_domain)/./././($match_name)/userfiles/
7833: -/uploaded/$1/$2/-x;
7834: }
7835: if ($file=~ m{^/userfiles/}) {
7836: $file =~ s{^/userfiles/}{/uploaded/};
7837: }
7838: return $file;
7839: }
7840:
7841: sub current_machine_domains {
7842: return &machine_domains(&hostname($perlvar{'lonHostID'}));
7843: }
7844:
7845: sub machine_domains {
7846: my ($hostname) = @_;
7847: my @domains;
7848: my %hostname = &all_hostnames();
7849: while( my($id, $name) = each(%hostname)) {
7850: # &logthis("-$id-$name-$hostname-");
7851: if ($hostname eq $name) {
7852: push(@domains,&host_domain($id));
7853: }
7854: }
7855: return @domains;
7856: }
7857:
7858: sub current_machine_ids {
7859: return &machine_ids(&hostname($perlvar{'lonHostID'}));
7860: }
7861:
7862: sub machine_ids {
7863: my ($hostname) = @_;
7864: $hostname ||= &hostname($perlvar{'lonHostID'});
7865: my @ids;
7866: my %name_to_host = &all_names();
7867: if (ref($name_to_host{$hostname}) eq 'ARRAY') {
7868: return @{ $name_to_host{$hostname} };
7869: }
7870: return;
7871: }
7872:
7873: sub additional_machine_domains {
7874: my @domains;
7875: open(my $fh,"<$perlvar{'lonTabDir'}/expected_domains.tab");
7876: while( my $line = <$fh>) {
7877: $line =~ s/\s//g;
7878: push(@domains,$line);
7879: }
7880: return @domains;
7881: }
7882:
7883: sub default_login_domain {
7884: my $domain = $perlvar{'lonDefDomain'};
7885: my $testdomain=(split(/\./,$ENV{'HTTP_HOST'}))[0];
7886: foreach my $posdom (¤t_machine_domains(),
7887: &additional_machine_domains()) {
7888: if (lc($posdom) eq lc($testdomain)) {
7889: $domain=$posdom;
7890: last;
7891: }
7892: }
7893: return $domain;
7894: }
7895:
7896: # ------------------------------------------------------------- Declutters URLs
7897:
7898: sub declutter {
7899: my $thisfn=shift;
7900: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
7901: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7902: $thisfn=~s/^\///;
7903: $thisfn=~s|^adm/wrapper/||;
7904: $thisfn=~s|^adm/coursedocs/showdoc/||;
7905: $thisfn=~s/^res\///;
7906: $thisfn=~s/\?.+$//;
7907: return $thisfn;
7908: }
7909:
7910: # ------------------------------------------------------------- Clutter up URLs
7911:
7912: sub clutter {
7913: my $thisfn='/'.&declutter(shift);
7914: if ($thisfn !~ m{^/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)/}
7915: || $thisfn =~ m{^/adm/(includes|pages)} ) {
7916: $thisfn='/res'.$thisfn;
7917: }
7918: if ($thisfn !~m|/adm|) {
7919: if ($thisfn =~ m|/ext/|) {
7920: $thisfn='/adm/wrapper'.$thisfn;
7921: } else {
7922: my ($ext) = ($thisfn =~ /\.(\w+)$/);
7923: my $embstyle=&Apache::loncommon::fileembstyle($ext);
7924: if ($embstyle eq 'ssi'
7925: || ($embstyle eq 'hdn')
7926: || ($embstyle eq 'rat')
7927: || ($embstyle eq 'prv')
7928: || ($embstyle eq 'ign')) {
7929: #do nothing with these
7930: } elsif (($embstyle eq 'img')
7931: || ($embstyle eq 'emb')
7932: || ($embstyle eq 'wrp')) {
7933: $thisfn='/adm/wrapper'.$thisfn;
7934: } elsif ($embstyle eq 'unk'
7935: && $thisfn!~/\.(sequence|page)$/) {
7936: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
7937: } else {
7938: # &logthis("Got a blank emb style");
7939: }
7940: }
7941: }
7942: return $thisfn;
7943: }
7944:
7945: sub clutter_with_no_wrapper {
7946: my $uri = &clutter(shift);
7947: if ($uri =~ m-^/adm/-) {
7948: $uri =~ s-^/adm/wrapper/-/-;
7949: $uri =~ s-^/adm/coursedocs/showdoc/-/-;
7950: }
7951: return $uri;
7952: }
7953:
7954: sub freeze_escape {
7955: my ($value)=@_;
7956: if (ref($value)) {
7957: $value=&nfreeze($value);
7958: return '__FROZEN__'.&escape($value);
7959: }
7960: return &escape($value);
7961: }
7962:
7963:
7964: sub thaw_unescape {
7965: my ($value)=@_;
7966: if ($value =~ /^__FROZEN__/) {
7967: substr($value,0,10,undef);
7968: $value=&unescape($value);
7969: return &thaw($value);
7970: }
7971: return &unescape($value);
7972: }
7973:
7974: sub correct_line_ends {
7975: my ($result)=@_;
7976: $$result =~s/\r\n/\n/mg;
7977: $$result =~s/\r/\n/mg;
7978: }
7979: # ================================================================ Main Program
7980:
7981: sub goodbye {
7982: &logthis("Starting Shut down");
7983: #not converted to using infrastruture and probably shouldn't be
7984: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&nfreeze(\%badServerCache))));
7985: #converted
7986: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
7987: &logthis(sprintf("%-20s is %s",'%homecache',length(&nfreeze(\%homecache))));
7988: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&nfreeze(\%titlecache))));
7989: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&nfreeze(\%courseresdatacache))));
7990: #1.1 only
7991: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&nfreeze(\%userresdatacache))));
7992: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&nfreeze(\%getsectioncache))));
7993: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&nfreeze(\%courseresversioncache))));
7994: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&nfreeze(\%resversioncache))));
7995: &logthis(sprintf("%-20s is %s",'%remembered',length(&nfreeze(\%remembered))));
7996: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
7997: &logthis(sprintf("%-20s is %s",'hits',$hits));
7998: &flushcourselogs();
7999: &logthis("Shutting down");
8000: }
8001:
8002: sub get_dns {
8003: my ($url,$func,$ignore_cache) = @_;
8004: if (!$ignore_cache) {
8005: my ($content,$cached)=
8006: &Apache::lonnet::is_cached_new('dns',$url);
8007: if ($cached) {
8008: &$func($content);
8009: return;
8010: }
8011: }
8012:
8013: my %alldns;
8014: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
8015: foreach my $dns (<$config>) {
8016: next if ($dns !~ /^\^(\S*)/x);
8017: $alldns{$1} = 1;
8018: }
8019: while (%alldns) {
8020: my ($dns) = keys(%alldns);
8021: delete($alldns{$dns});
8022: my $ua=new LWP::UserAgent;
8023: my $request=new HTTP::Request('GET',"http://$dns$url");
8024: my $response=$ua->request($request);
8025: next if ($response->is_error());
8026: my @content = split("\n",$response->content);
8027: &Apache::lonnet::do_cache_new('dns',$url,\@content,30*24*60*60);
8028: &$func(\@content);
8029: return;
8030: }
8031: close($config);
8032: my $which = (split('/',$url))[3];
8033: &logthis("unable to contact DNS defaulting to on disk file dns_$which.tab\n");
8034: open($config,"<$perlvar{'lonTabDir'}/dns_$which.tab");
8035: my @content = <$config>;
8036: &$func(\@content);
8037: return;
8038: }
8039: # ------------------------------------------------------------ Read domain file
8040: {
8041: my $loaded;
8042: my %domain;
8043:
8044: sub parse_domain_tab {
8045: my ($lines) = @_;
8046: foreach my $line (@$lines) {
8047: next if ($line =~ /^(\#|\s*$ )/x);
8048:
8049: chomp($line);
8050: my ($name,@elements) = split(/:/,$line,9);
8051: my %this_domain;
8052: foreach my $field ('description', 'auth_def', 'auth_arg_def',
8053: 'lang_def', 'city', 'longi', 'lati',
8054: 'primary') {
8055: $this_domain{$field} = shift(@elements);
8056: }
8057: $domain{$name} = \%this_domain;
8058: }
8059: }
8060:
8061: sub reset_domain_info {
8062: undef($loaded);
8063: undef(%domain);
8064: }
8065:
8066: sub load_domain_tab {
8067: my ($ignore_cache) = @_;
8068: &get_dns('/adm/dns/domain',\&parse_domain_tab,$ignore_cache);
8069: my $fh;
8070: if (open($fh,"<".$perlvar{'lonTabDir'}.'/domain.tab')) {
8071: my @lines = <$fh>;
8072: &parse_domain_tab(\@lines);
8073: }
8074: close($fh);
8075: $loaded = 1;
8076: }
8077:
8078: sub domain {
8079: &load_domain_tab() if (!$loaded);
8080:
8081: my ($name,$what) = @_;
8082: return if ( !exists($domain{$name}) );
8083:
8084: if (!$what) {
8085: return $domain{$name}{'description'};
8086: }
8087: return $domain{$name}{$what};
8088: }
8089: }
8090:
8091:
8092: # ------------------------------------------------------------- Read hosts file
8093: {
8094: my %hostname;
8095: my %hostdom;
8096: my %libserv;
8097: my $loaded;
8098: my %name_to_host;
8099:
8100: sub parse_hosts_tab {
8101: my ($file) = @_;
8102: foreach my $configline (@$file) {
8103: next if ($configline =~ /^(\#|\s*$ )/x);
8104: next if ($configline =~ /^\^/);
8105: chomp($configline);
8106: my ($id,$domain,$role,$name)=split(/:/,$configline);
8107: $name=~s/\s//g;
8108: if ($id && $domain && $role && $name) {
8109: $hostname{$id}=$name;
8110: push(@{$name_to_host{$name}}, $id);
8111: $hostdom{$id}=$domain;
8112: if ($role eq 'library') { $libserv{$id}=$name; }
8113: }
8114: }
8115: }
8116:
8117: sub reset_hosts_info {
8118: &purge_remembered();
8119: &reset_domain_info();
8120: &reset_hosts_ip_info();
8121: undef(%name_to_host);
8122: undef(%hostname);
8123: undef(%hostdom);
8124: undef(%libserv);
8125: undef($loaded);
8126: }
8127:
8128: sub load_hosts_tab {
8129: my ($ignore_cache) = @_;
8130: &get_dns('/adm/dns/hosts',\&parse_hosts_tab,$ignore_cache);
8131: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
8132: my @config = <$config>;
8133: &parse_hosts_tab(\@config);
8134: close($config);
8135: $loaded=1;
8136: }
8137:
8138: sub hostname {
8139: &load_hosts_tab() if (!$loaded);
8140:
8141: my ($lonid) = @_;
8142: return $hostname{$lonid};
8143: }
8144:
8145: sub all_hostnames {
8146: &load_hosts_tab() if (!$loaded);
8147:
8148: return %hostname;
8149: }
8150:
8151: sub all_names {
8152: &load_hosts_tab() if (!$loaded);
8153:
8154: return %name_to_host;
8155: }
8156:
8157: sub is_library {
8158: &load_hosts_tab() if (!$loaded);
8159:
8160: return exists($libserv{$_[0]});
8161: }
8162:
8163: sub all_library {
8164: &load_hosts_tab() if (!$loaded);
8165:
8166: return %libserv;
8167: }
8168:
8169: sub get_servers {
8170: &load_hosts_tab() if (!$loaded);
8171:
8172: my ($domain,$type) = @_;
8173: my %possible_hosts = ($type eq 'library') ? %libserv
8174: : %hostname;
8175: my %result;
8176: if (ref($domain) eq 'ARRAY') {
8177: while ( my ($host,$hostname) = each(%possible_hosts)) {
8178: if (grep(/^\Q$hostdom{$host}\E$/,@$domain)) {
8179: $result{$host} = $hostname;
8180: }
8181: }
8182: } else {
8183: while ( my ($host,$hostname) = each(%possible_hosts)) {
8184: if ($hostdom{$host} eq $domain) {
8185: $result{$host} = $hostname;
8186: }
8187: }
8188: }
8189: return %result;
8190: }
8191:
8192: sub host_domain {
8193: &load_hosts_tab() if (!$loaded);
8194:
8195: my ($lonid) = @_;
8196: return $hostdom{$lonid};
8197: }
8198:
8199: sub all_domains {
8200: &load_hosts_tab() if (!$loaded);
8201:
8202: my %seen;
8203: my @uniq = grep(!$seen{$_}++, values(%hostdom));
8204: return @uniq;
8205: }
8206: }
8207:
8208: {
8209: my %iphost;
8210: my %name_to_ip;
8211: my %lonid_to_ip;
8212:
8213: sub get_hosts_from_ip {
8214: my ($ip) = @_;
8215: my %iphosts = &get_iphost();
8216: if (ref($iphosts{$ip})) {
8217: return @{$iphosts{$ip}};
8218: }
8219: return;
8220: }
8221:
8222: sub reset_hosts_ip_info {
8223: undef(%iphost);
8224: undef(%name_to_ip);
8225: undef(%lonid_to_ip);
8226: }
8227:
8228: sub get_host_ip {
8229: my ($lonid) = @_;
8230: if (exists($lonid_to_ip{$lonid})) {
8231: return $lonid_to_ip{$lonid};
8232: }
8233: my $name=&hostname($lonid);
8234: my $ip = gethostbyname($name);
8235: return if (!$ip || length($ip) ne 4);
8236: $ip=inet_ntoa($ip);
8237: $name_to_ip{$name} = $ip;
8238: $lonid_to_ip{$lonid} = $ip;
8239: return $ip;
8240: }
8241:
8242: sub get_iphost {
8243: my ($ignore_cache) = @_;
8244:
8245: if (!$ignore_cache) {
8246: if (%iphost) {
8247: return %iphost;
8248: }
8249: my ($ip_info,$cached)=
8250: &Apache::lonnet::is_cached_new('iphost','iphost');
8251: if ($cached) {
8252: %iphost = %{$ip_info->[0]};
8253: %name_to_ip = %{$ip_info->[1]};
8254: %lonid_to_ip = %{$ip_info->[2]};
8255: return %iphost;
8256: }
8257: }
8258:
8259: # get yesterday's info for fallback
8260: my %old_name_to_ip;
8261: my ($ip_info,$cached)=
8262: &Apache::lonnet::is_cached_new('iphost','iphost');
8263: if ($cached) {
8264: %old_name_to_ip = %{$ip_info->[1]};
8265: }
8266:
8267: my %name_to_host = &all_names();
8268: foreach my $name (keys(%name_to_host)) {
8269: my $ip;
8270: if (!exists($name_to_ip{$name})) {
8271: $ip = gethostbyname($name);
8272: if (!$ip || length($ip) ne 4) {
8273: if (defined($old_name_to_ip{$name})) {
8274: $ip = $old_name_to_ip{$name};
8275: &logthis("Can't find $name defaulting to old $ip");
8276: } else {
8277: &logthis("Name $name no IP found");
8278: next;
8279: }
8280: } else {
8281: $ip=inet_ntoa($ip);
8282: }
8283: $name_to_ip{$name} = $ip;
8284: } else {
8285: $ip = $name_to_ip{$name};
8286: }
8287: foreach my $id (@{ $name_to_host{$name} }) {
8288: $lonid_to_ip{$id} = $ip;
8289: }
8290: push(@{$iphost{$ip}},@{$name_to_host{$name}});
8291: }
8292: &Apache::lonnet::do_cache_new('iphost','iphost',
8293: [\%iphost,\%name_to_ip,\%lonid_to_ip],
8294: 48*60*60);
8295:
8296: return %iphost;
8297: }
8298: }
8299:
8300: BEGIN {
8301:
8302: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
8303: unless ($readit) {
8304: {
8305: my $configvars = LONCAPA::Configuration::read_conf('loncapa.conf');
8306: %perlvar = (%perlvar,%{$configvars});
8307: }
8308:
8309:
8310: # ------------------------------------------------------ Read spare server file
8311: {
8312: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
8313:
8314: while (my $configline=<$config>) {
8315: chomp($configline);
8316: if ($configline) {
8317: my ($host,$type) = split(':',$configline,2);
8318: if (!defined($type) || $type eq '') { $type = 'default' };
8319: push(@{ $spareid{$type} }, $host);
8320: }
8321: }
8322: close($config);
8323: }
8324: # ------------------------------------------------------------ Read permissions
8325: {
8326: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
8327:
8328: while (my $configline=<$config>) {
8329: chomp($configline);
8330: if ($configline) {
8331: my ($role,$perm)=split(/ /,$configline);
8332: if ($perm ne '') { $pr{$role}=$perm; }
8333: }
8334: }
8335: close($config);
8336: }
8337:
8338: # -------------------------------------------- Read plain texts for permissions
8339: {
8340: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
8341:
8342: while (my $configline=<$config>) {
8343: chomp($configline);
8344: if ($configline) {
8345: my ($short,@plain)=split(/:/,$configline);
8346: %{$prp{$short}} = ();
8347: if (@plain > 0) {
8348: $prp{$short}{'std'} = $plain[0];
8349: for (my $i=1; $i<@plain; $i++) {
8350: $prp{$short}{'alt'.$i} = $plain[$i];
8351: }
8352: }
8353: }
8354: }
8355: close($config);
8356: }
8357:
8358: # ---------------------------------------------------------- Read package table
8359: {
8360: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
8361:
8362: while (my $configline=<$config>) {
8363: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
8364: chomp($configline);
8365: my ($short,$plain)=split(/:/,$configline);
8366: my ($pack,$name)=split(/\&/,$short);
8367: if ($plain ne '') {
8368: $packagetab{$pack.'&'.$name.'&name'}=$name;
8369: $packagetab{$short}=$plain;
8370: }
8371: }
8372: close($config);
8373: }
8374:
8375: # ------------- set up temporary directory
8376: {
8377: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
8378:
8379: }
8380:
8381: $memcache=new Cache::Memcached({'servers' => ['127.0.0.1:11211'],
8382: 'compress_threshold'=> 20_000,
8383: });
8384:
8385: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
8386: $dumpcount=0;
8387:
8388: &logtouch();
8389: &logthis('<font color="yellow">INFO: Read configuration</font>');
8390: $readit=1;
8391: {
8392: use integer;
8393: my $test=(2**32)+1;
8394: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
8395: &logthis(" Detected 64bit platform ($_64bit)");
8396: }
8397: }
8398: }
8399:
8400: 1;
8401: __END__
8402:
8403: =pod
8404:
8405: =head1 NAME
8406:
8407: Apache::lonnet - Subroutines to ask questions about things in the network.
8408:
8409: =head1 SYNOPSIS
8410:
8411: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
8412:
8413: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
8414:
8415: Common parameters:
8416:
8417: =over 4
8418:
8419: =item *
8420:
8421: $uname : an internal username (if $cname expecting a course Id specifically)
8422:
8423: =item *
8424:
8425: $udom : a domain (if $cdom expecting a course's domain specifically)
8426:
8427: =item *
8428:
8429: $symb : a resource instance identifier
8430:
8431: =item *
8432:
8433: $namespace : the name of a .db file that contains the data needed or
8434: being set.
8435:
8436: =back
8437:
8438: =head1 OVERVIEW
8439:
8440: lonnet provides subroutines which interact with the
8441: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
8442: about classes, users, and resources.
8443:
8444: For many of these objects you can also use this to store data about
8445: them or modify them in various ways.
8446:
8447: =head2 Symbs
8448:
8449: To identify a specific instance of a resource, LON-CAPA uses symbols
8450: or "symbs"X<symb>. These identifiers are built from the URL of the
8451: map, the resource number of the resource in the map, and the URL of
8452: the resource itself. The latter is somewhat redundant, but might help
8453: if maps change.
8454:
8455: An example is
8456:
8457: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
8458:
8459: The respective map entry is
8460:
8461: <resource id="19" src="/res/msu/korte/tests/part12.problem"
8462: title="Problem 2">
8463: </resource>
8464:
8465: Symbs are used by the random number generator, as well as to store and
8466: restore data specific to a certain instance of for example a problem.
8467:
8468: =head2 Storing And Retrieving Data
8469:
8470: X<store()>X<cstore()>X<restore()>Three of the most important functions
8471: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
8472: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
8473: is is the non-critical message twin of cstore. These functions are for
8474: handlers to store a perl hash to a user's permanent data space in an
8475: easy manner, and to retrieve it again on another call. It is expected
8476: that a handler would use this once at the beginning to retrieve data,
8477: and then again once at the end to send only the new data back.
8478:
8479: The data is stored in the user's data directory on the user's
8480: homeserver under the ID of the course.
8481:
8482: The hash that is returned by restore will have all of the previous
8483: value for all of the elements of the hash.
8484:
8485: Example:
8486:
8487: #creating a hash
8488: my %hash;
8489: $hash{'foo'}='bar';
8490:
8491: #storing it
8492: &Apache::lonnet::cstore(\%hash);
8493:
8494: #changing a value
8495: $hash{'foo'}='notbar';
8496:
8497: #adding a new value
8498: $hash{'bar'}='foo';
8499: &Apache::lonnet::cstore(\%hash);
8500:
8501: #retrieving the hash
8502: my %history=&Apache::lonnet::restore();
8503:
8504: #print the hash
8505: foreach my $key (sort(keys(%history))) {
8506: print("\%history{$key} = $history{$key}");
8507: }
8508:
8509: Will print out:
8510:
8511: %history{1:foo} = bar
8512: %history{1:keys} = foo:timestamp
8513: %history{1:timestamp} = 990455579
8514: %history{2:bar} = foo
8515: %history{2:foo} = notbar
8516: %history{2:keys} = foo:bar:timestamp
8517: %history{2:timestamp} = 990455580
8518: %history{bar} = foo
8519: %history{foo} = notbar
8520: %history{timestamp} = 990455580
8521: %history{version} = 2
8522:
8523: Note that the special hash entries C<keys>, C<version> and
8524: C<timestamp> were added to the hash. C<version> will be equal to the
8525: total number of versions of the data that have been stored. The
8526: C<timestamp> attribute will be the UNIX time the hash was
8527: stored. C<keys> is available in every historical section to list which
8528: keys were added or changed at a specific historical revision of a
8529: hash.
8530:
8531: B<Warning>: do not store the hash that restore returns directly. This
8532: will cause a mess since it will restore the historical keys as if the
8533: were new keys. I.E. 1:foo will become 1:1:foo etc.
8534:
8535: Calling convention:
8536:
8537: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
8538: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
8539:
8540: For more detailed information, see lonnet specific documentation.
8541:
8542: =head1 RETURN MESSAGES
8543:
8544: =over 4
8545:
8546: =item * B<con_lost>: unable to contact remote host
8547:
8548: =item * B<con_delayed>: unable to contact remote host, message will be delivered
8549: when the connection is brought back up
8550:
8551: =item * B<con_failed>: unable to contact remote host and unable to save message
8552: for later delivery
8553:
8554: =item * B<error:>: an error a occured, a description of the error follows the :
8555:
8556: =item * B<no_such_host>: unable to fund a host associated with the user/domain
8557: that was requested
8558:
8559: =back
8560:
8561: =head1 PUBLIC SUBROUTINES
8562:
8563: =head2 Session Environment Functions
8564:
8565: =over 4
8566:
8567: =item *
8568: X<appenv()>
8569: B<appenv(%hash)>: the value of %hash is written to
8570: the user envirnoment file, and will be restored for each access this
8571: user makes during this session, also modifies the %env for the current
8572: process
8573:
8574: =item *
8575: X<delenv()>
8576: B<delenv($regexp)>: removes all items from the session
8577: environment file that matches the regular expression in $regexp. The
8578: values are also delted from the current processes %env.
8579:
8580: =item * get_env_multiple($name)
8581:
8582: gets $name from the %env hash, it seemlessly handles the cases where multiple
8583: values may be defined and end up as an array ref.
8584:
8585: returns an array of values
8586:
8587: =back
8588:
8589: =head2 User Information
8590:
8591: =over 4
8592:
8593: =item *
8594: X<queryauthenticate()>
8595: B<queryauthenticate($uname,$udom)>: try to determine user's current
8596: authentication scheme
8597:
8598: =item *
8599: X<authenticate()>
8600: B<authenticate($uname,$upass,$udom)>: try to
8601: authenticate user from domain's lib servers (first use the current
8602: one). C<$upass> should be the users password.
8603:
8604: =item *
8605: X<homeserver()>
8606: B<homeserver($uname,$udom)>: find the server which has
8607: the user's directory and files (there must be only one), this caches
8608: the answer, and also caches if there is a borken connection.
8609:
8610: =item *
8611: X<idget()>
8612: B<idget($udom,@ids)>: find the usernames behind a list of IDs
8613: (IDs are a unique resource in a domain, there must be only 1 ID per
8614: username, and only 1 username per ID in a specific domain) (returns
8615: hash: id=>name,id=>name)
8616:
8617: =item *
8618: X<idrget()>
8619: B<idrget($udom,@unames)>: find the IDs behind a list of
8620: usernames (returns hash: name=>id,name=>id)
8621:
8622: =item *
8623: X<idput()>
8624: B<idput($udom,%ids)>: store away a list of names and associated IDs
8625:
8626: =item *
8627: X<rolesinit()>
8628: B<rolesinit($udom,$username,$authhost)>: get user privileges
8629:
8630: =item *
8631: X<getsection()>
8632: B<getsection($udom,$uname,$cname)>: finds the section of student in the
8633: course $cname, return section name/number or '' for "not in course"
8634: and '-1' for "no section"
8635:
8636: =item *
8637: X<userenvironment()>
8638: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
8639: passed in @what from the requested user's environment, returns a hash
8640:
8641: =item *
8642: X<userlog_query()>
8643: B<userlog_query($uname,$udom,%filters)>: retrieves data from a user's
8644: activity.log file. %filters defines filters applied when parsing the
8645: log file. These can be start or end timestamps, or the type of action
8646: - log to look for Login or Logout events, check for Checkin or
8647: Checkout, role for role selection. The response is in the form
8648: timestamp1:hostid1:event1×tamp2:hostid2:event2 where events are
8649: escaped strings of the action recorded in the activity.log file.
8650:
8651: =back
8652:
8653: =head2 User Roles
8654:
8655: =over 4
8656:
8657: =item *
8658:
8659: allowed($priv,$uri,$symb,$role) : check for a user privilege; returns codes for allowed actions
8660: F: full access
8661: U,I,K: authentication modes (cxx only)
8662: '': forbidden
8663: 1: user needs to choose course
8664: 2: browse allowed
8665: A: passphrase authentication needed
8666:
8667: =item *
8668:
8669: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
8670: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
8671: and course level
8672:
8673: =item *
8674:
8675: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
8676: explanation of a user role term
8677:
8678: =item *
8679:
8680: get_my_roles($uname,$udom,$context,$types,$roles,$roledoms) :
8681: All arguments are optional. Returns a hash of a roles, either for
8682: co-author/assistant author roles for a user's Construction Space
8683: (default), or if $context is 'userroles', roles for the user himself,
8684: In the hash, keys are set to colon-sparated $uname,$udom,and $role,
8685: and value is set to colon-separated start and end times for the role.
8686: If no username and domain are specified, will default to current
8687: user/domain. Types, roles, and roledoms are references to arrays,
8688: of role statuses (active, future or previous), roles
8689: (e.g., cc,in, st etc.) and domains of the roles which can be used
8690: to restrict the list of roles reported. If no array ref is
8691: provided for types, will default to return only active roles.
8692:
8693: =back
8694:
8695: =head2 User Modification
8696:
8697: =over 4
8698:
8699: =item *
8700:
8701: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
8702: user for the level given by URL. Optional start and end dates (leave empty
8703: string or zero for "no date")
8704:
8705: =item *
8706:
8707: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
8708: change a users, password, possible return values are: ok,
8709: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
8710: refused
8711:
8712: =item *
8713:
8714: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
8715:
8716: =item *
8717:
8718: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
8719: modify user
8720:
8721: =item *
8722:
8723: modifystudent
8724:
8725: modify a students enrollment and identification information.
8726: The course id is resolved based on the current users environment.
8727: This means the envoking user must be a course coordinator or otherwise
8728: associated with a course.
8729:
8730: This call is essentially a wrapper for lonnet::modifyuser and
8731: lonnet::modify_student_enrollment
8732:
8733: Inputs:
8734:
8735: =over 4
8736:
8737: =item B<$udom> Students loncapa domain
8738:
8739: =item B<$uname> Students loncapa login name
8740:
8741: =item B<$uid> Students id/student number
8742:
8743: =item B<$umode> Students authentication mode
8744:
8745: =item B<$upass> Students password
8746:
8747: =item B<$first> Students first name
8748:
8749: =item B<$middle> Students middle name
8750:
8751: =item B<$last> Students last name
8752:
8753: =item B<$gene> Students generation
8754:
8755: =item B<$usec> Students section in course
8756:
8757: =item B<$end> Unix time of the roles expiration
8758:
8759: =item B<$start> Unix time of the roles start date
8760:
8761: =item B<$forceid> If defined, allow $uid to be changed
8762:
8763: =item B<$desiredhome> server to use as home server for student
8764:
8765: =back
8766:
8767: =item *
8768:
8769: modify_student_enrollment
8770:
8771: Change a students enrollment status in a class. The environment variable
8772: 'role.request.course' must be defined for this function to proceed.
8773:
8774: Inputs:
8775:
8776: =over 4
8777:
8778: =item $udom, students domain
8779:
8780: =item $uname, students name
8781:
8782: =item $uid, students user id
8783:
8784: =item $first, students first name
8785:
8786: =item $middle
8787:
8788: =item $last
8789:
8790: =item $gene
8791:
8792: =item $usec
8793:
8794: =item $end
8795:
8796: =item $start
8797:
8798: =back
8799:
8800:
8801: =item *
8802:
8803: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
8804: custom role; give a custom role to a user for the level given by URL. Specify
8805: name and domain of role author, and role name
8806:
8807: =item *
8808:
8809: revokerole($udom,$uname,$url,$role) : revoke a role for url
8810:
8811: =item *
8812:
8813: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
8814:
8815: =back
8816:
8817: =head2 Course Infomation
8818:
8819: =over 4
8820:
8821: =item *
8822:
8823: coursedescription($courseid) : returns a hash of information about the
8824: specified course id, including all environment settings for the
8825: course, the description of the course will be in the hash under the
8826: key 'description'
8827:
8828: =item *
8829:
8830: resdata($name,$domain,$type,@which) : request for current parameter
8831: setting for a specific $type, where $type is either 'course' or 'user',
8832: @what should be a list of parameters to ask about. This routine caches
8833: answers for 5 minutes.
8834:
8835: =item *
8836:
8837: get_courseresdata($courseid, $domain) : dump the entire course resource
8838: data base, returning a hash that is keyed by the resource name and has
8839: values that are the resource value. I believe that the timestamps and
8840: versions are also returned.
8841:
8842:
8843: =back
8844:
8845: =head2 Course Modification
8846:
8847: =over 4
8848:
8849: =item *
8850:
8851: writecoursepref($courseid,%prefs) : write preferences (environment
8852: database) for a course
8853:
8854: =item *
8855:
8856: createcourse($udom,$description,$url) : make/modify course
8857:
8858: =back
8859:
8860: =head2 Resource Subroutines
8861:
8862: =over 4
8863:
8864: =item *
8865:
8866: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
8867:
8868: =item *
8869:
8870: repcopy($filename) : subscribes to the requested file, and attempts to
8871: replicate from the owning library server, Might return
8872: 'unavailable', 'not_found', 'forbidden', 'ok', or
8873: 'bad_request', also attempts to grab the metadata for the
8874: resource. Expects the local filesystem pathname
8875: (/home/httpd/html/res/....)
8876:
8877: =back
8878:
8879: =head2 Resource Information
8880:
8881: =over 4
8882:
8883: =item *
8884:
8885: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
8886: a vairety of different possible values, $varname should be a request
8887: string, and the other parameters can be used to specify who and what
8888: one is asking about.
8889:
8890: Possible values for $varname are environment.lastname (or other item
8891: from the envirnment hash), user.name (or someother aspect about the
8892: user), resource.0.maxtries (or some other part and parameter of a
8893: resource)
8894:
8895: =item *
8896:
8897: directcondval($number) : get current value of a condition; reads from a state
8898: string
8899:
8900: =item *
8901:
8902: condval($condidx) : value of condition index based on state
8903:
8904: =item *
8905:
8906: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
8907: resource's metadata, $what should be either a specific key, or either
8908: 'keys' (to get a list of possible keys) or 'packages' to get a list of
8909: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
8910:
8911: this function automatically caches all requests
8912:
8913: =item *
8914:
8915: metadata_query($query,$custom,$customshow) : make a metadata query against the
8916: network of library servers; returns file handle of where SQL and regex results
8917: will be stored for query
8918:
8919: =item *
8920:
8921: symbread($filename) : return symbolic list entry (filename argument optional);
8922: returns the data handle
8923:
8924: =item *
8925:
8926: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
8927: a possible symb for the URL in $thisfn, and if is an encryypted
8928: resource that the user accessed using /enc/ returns a 1 on success, 0
8929: on failure, user must be in a course, as it assumes the existance of
8930: the course initial hash, and uses $env('request.course.id'}
8931:
8932:
8933: =item *
8934:
8935: symbclean($symb) : removes versions numbers from a symb, returns the
8936: cleaned symb
8937:
8938: =item *
8939:
8940: is_on_map($uri) : checks if the $uri is somewhere on the current
8941: course map, user must be in a course for it to work.
8942:
8943: =item *
8944:
8945: numval($salt) : return random seed value (addend for rndseed)
8946:
8947: =item *
8948:
8949: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
8950: a random seed, all arguments are optional, if they aren't sent it uses the
8951: environment to derive them. Note: if symb isn't sent and it can't get one
8952: from &symbread it will use the current time as its return value
8953:
8954: =item *
8955:
8956: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
8957: unfakeable, receipt
8958:
8959: =item *
8960:
8961: receipt() : API to ireceipt working off of env values; given out to users
8962:
8963: =item *
8964:
8965: countacc($url) : count the number of accesses to a given URL
8966:
8967: =item *
8968:
8969: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
8970:
8971: =item *
8972:
8973: checkin($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 $tcrsid)
8974:
8975: =item *
8976:
8977: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
8978:
8979: =item *
8980:
8981: devalidate($symb) : devalidate temporary spreadsheet calculations,
8982: forcing spreadsheet to reevaluate the resource scores next time.
8983:
8984: =back
8985:
8986: =head2 Storing/Retreiving Data
8987:
8988: =over 4
8989:
8990: =item *
8991:
8992: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
8993: for this url; hashref needs to be given and should be a \%hashname; the
8994: remaining args aren't required and if they aren't passed or are '' they will
8995: be derived from the env
8996:
8997: =item *
8998:
8999: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
9000: uses critical subroutine
9001:
9002: =item *
9003:
9004: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
9005: all args are optional
9006:
9007: =item *
9008:
9009: dumpstore($namespace,$udom,$uname,$regexp,$range) :
9010: dumps the complete (or key matching regexp) namespace into a hash
9011: ($udom, $uname, $regexp, $range are optional) for a namespace that is
9012: normally &store()ed into
9013:
9014: $range should be either an integer '100' (give me the first 100
9015: matching records)
9016: or be two integers sperated by a - with no spaces
9017: '30-50' (give me the 30th through the 50th matching
9018: records)
9019:
9020:
9021: =item *
9022:
9023: putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
9024: replaces a &store() version of data with a replacement set of data
9025: for a particular resource in a namespace passed in the $storehash hash
9026: reference
9027:
9028: =item *
9029:
9030: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
9031: works very similar to store/cstore, but all data is stored in a
9032: temporary location and can be reset using tmpreset, $storehash should
9033: be a hash reference, returns nothing on success
9034:
9035: =item *
9036:
9037: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
9038: similar to restore, but all data is stored in a temporary location and
9039: can be reset using tmpreset. Returns a hash of values on success,
9040: error string otherwise.
9041:
9042: =item *
9043:
9044: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
9045: deltes all keys for $symb form the temporary storage hash.
9046:
9047: =item *
9048:
9049: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
9050: reference filled in from namesp ($udom and $uname are optional)
9051:
9052: =item *
9053:
9054: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
9055: namesp ($udom and $uname are optional)
9056:
9057: =item *
9058:
9059: dump($namespace,$udom,$uname,$regexp,$range) :
9060: dumps the complete (or key matching regexp) namespace into a hash
9061: ($udom, $uname, $regexp, $range are optional)
9062:
9063: $range should be either an integer '100' (give me the first 100
9064: matching records)
9065: or be two integers sperated by a - with no spaces
9066: '30-50' (give me the 30th through the 50th matching
9067: records)
9068: =item *
9069:
9070: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
9071: $store can be a scalar, an array reference, or if the amount to be
9072: incremented is > 1, a hash reference.
9073:
9074: ($udom and $uname are optional)
9075:
9076: =item *
9077:
9078: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
9079: ($udom and $uname are optional)
9080:
9081: =item *
9082:
9083: cput($namespace,$storehash,$udom,$uname) : critical put
9084: ($udom and $uname are optional)
9085:
9086: =item *
9087:
9088: newput($namespace,$storehash,$udom,$uname) :
9089:
9090: Attempts to store the items in the $storehash, but only if they don't
9091: currently exist, if this succeeds you can be certain that you have
9092: successfully created a new key value pair in the $namespace db.
9093:
9094:
9095: Args:
9096: $namespace: name of database to store values to
9097: $storehash: hashref to store to the db
9098: $udom: (optional) domain of user containing the db
9099: $uname: (optional) name of user caontaining the db
9100:
9101: Returns:
9102: 'ok' -> succeeded in storing all keys of $storehash
9103: 'key_exists: <key>' -> failed to anything out of $storehash, as at
9104: least <key> already existed in the db (other
9105: requested keys may also already exist)
9106: 'error: <msg>' -> unable to tie the DB or other erorr occured
9107: 'con_lost' -> unable to contact request server
9108: 'refused' -> action was not allowed by remote machine
9109:
9110:
9111: =item *
9112:
9113: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
9114: reference filled in from namesp (encrypts the return communication)
9115: ($udom and $uname are optional)
9116:
9117: =item *
9118:
9119: log($udom,$name,$home,$message) : write to permanent log for user; use
9120: critical subroutine
9121:
9122: =item *
9123:
9124: get_dom($namespace,$storearr,$udom,$uhome) : returns hash with keys from
9125: array reference filled in from namespace found in domain level on either
9126: specified domain server ($uhome) or primary domain server ($udom and $uhome are optional).
9127:
9128: =item *
9129:
9130: put_dom($namespace,$storehash,$udom,$uhome) : stores hash in namespace at
9131: domain level either on specified domain server ($uhome) or primary domain
9132: server ($udom and $uhome are optional)
9133:
9134: =back
9135:
9136: =head2 Network Status Functions
9137:
9138: =over 4
9139:
9140: =item *
9141:
9142: dirlist($uri) : return directory list based on URI
9143:
9144: =item *
9145:
9146: spareserver() : find server with least workload from spare.tab
9147:
9148: =back
9149:
9150: =head2 Apache Request
9151:
9152: =over 4
9153:
9154: =item *
9155:
9156: ssi($url,%hash) : server side include, does a complete request cycle on url to
9157: localhost, posts hash
9158:
9159: =back
9160:
9161: =head2 Data to String to Data
9162:
9163: =over 4
9164:
9165: =item *
9166:
9167: hash2str(%hash) : convert a hash into a string complete with escaping and '='
9168: and '&' separators, supports elements that are arrayrefs and hashrefs
9169:
9170: =item *
9171:
9172: hashref2str($hashref) : convert a hashref into a string complete with
9173: escaping and '=' and '&' separators, supports elements that are
9174: arrayrefs and hashrefs
9175:
9176: =item *
9177:
9178: arrayref2str($arrayref) : convert an arrayref into a string complete
9179: with escaping and '&' separators, supports elements that are arrayrefs
9180: and hashrefs
9181:
9182: =item *
9183:
9184: str2hash($string) : convert string to hash using unescaping and
9185: splitting on '=' and '&', supports elements that are arrayrefs and
9186: hashrefs
9187:
9188: =item *
9189:
9190: str2array($string) : convert string to hash using unescaping and
9191: splitting on '&', supports elements that are arrayrefs and hashrefs
9192:
9193: =back
9194:
9195: =head2 Logging Routines
9196:
9197: =over 4
9198:
9199: These routines allow one to make log messages in the lonnet.log and
9200: lonnet.perm logfiles.
9201:
9202: =item *
9203:
9204: logtouch() : make sure the logfile, lonnet.log, exists
9205:
9206: =item *
9207:
9208: logthis() : append message to the normal lonnet.log file, it gets
9209: preiodically rolled over and deleted.
9210:
9211: =item *
9212:
9213: logperm() : append a permanent message to lonnet.perm.log, this log
9214: file never gets deleted by any automated portion of the system, only
9215: messages of critical importance should go in here.
9216:
9217: =back
9218:
9219: =head2 General File Helper Routines
9220:
9221: =over 4
9222:
9223: =item *
9224:
9225: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
9226: (a) files in /uploaded
9227: (i) If a local copy of the file exists -
9228: compares modification date of local copy with last-modified date for
9229: definitive version stored on home server for course. If local copy is
9230: stale, requests a new version from the home server and stores it.
9231: If the original has been removed from the home server, then local copy
9232: is unlinked.
9233: (ii) If local copy does not exist -
9234: requests the file from the home server and stores it.
9235:
9236: If $caller is 'uploadrep':
9237: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
9238: for request for files originally uploaded via DOCS.
9239: - returns 'ok' if fresh local copy now available, -1 otherwise.
9240:
9241: Otherwise:
9242: This indicates a call from the content generation phase of the request.
9243: - returns the entire contents of the file or -1.
9244:
9245: (b) files in /res
9246: - returns the entire contents of a file or -1;
9247: it properly subscribes to and replicates the file if neccessary.
9248:
9249:
9250: =item *
9251:
9252: stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
9253: reference
9254:
9255: returns either a stat() list of data about the file or an empty list
9256: if the file doesn't exist or couldn't find out about it (connection
9257: problems or user unknown)
9258:
9259: =item *
9260:
9261: filelocation($dir,$file) : returns file system location of a file
9262: based on URI; meant to be "fairly clean" absolute reference, $dir is a
9263: directory that relative $file lookups are to looked in ($dir of /a/dir
9264: and a file of ../bob will become /a/bob)
9265:
9266: =item *
9267:
9268: hreflocation($dir,$file) : returns file system location or a URL; same as
9269: filelocation except for hrefs
9270:
9271: =item *
9272:
9273: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
9274:
9275: =back
9276:
9277: =head2 Usererfile file routines (/uploaded*)
9278:
9279: =over 4
9280:
9281: =item *
9282:
9283: userfileupload(): main rotine for putting a file in a user or course's
9284: filespace, arguments are,
9285:
9286: formname - required - this is the name of the element in $env where the
9287: filename, and the contents of the file to create/modifed exist
9288: the filename is in $env{'form.'.$formname.'.filename'} and the
9289: contents of the file is located in $env{'form.'.$formname}
9290: coursedoc - if true, store the file in the course of the active role
9291: of the current user
9292: subdir - required - subdirectory to put the file in under ../userfiles/
9293: if undefined, it will be placed in "unknown"
9294:
9295: (This routine calls clean_filename() to remove any dangerous
9296: characters from the filename, and then calls finuserfileupload() to
9297: complete the transaction)
9298:
9299: returns either the url of the uploaded file (/uploaded/....) if successful
9300: and /adm/notfound.html if unsuccessful
9301:
9302: =item *
9303:
9304: clean_filename(): routine for cleaing a filename up for storage in
9305: userfile space, argument is:
9306:
9307: filename - proposed filename
9308:
9309: returns: the new clean filename
9310:
9311: =item *
9312:
9313: finishuserfileupload(): routine that creaes and sends the file to
9314: userspace, probably shouldn't be called directly
9315:
9316: docuname: username or courseid of destination for the file
9317: docudom: domain of user/course of destination for the file
9318: formname: same as for userfileupload()
9319: fname: filename (inculding subdirectories) for the file
9320:
9321: returns either the url of the uploaded file (/uploaded/....) if successful
9322: and /adm/notfound.html if unsuccessful
9323:
9324: =item *
9325:
9326: renameuserfile(): renames an existing userfile to a new name
9327:
9328: Args:
9329: docuname: username or courseid of destination for the file
9330: docudom: domain of user/course of destination for the file
9331: old: current file name (including any subdirs under userfiles)
9332: new: desired file name (including any subdirs under userfiles)
9333:
9334: =item *
9335:
9336: mkdiruserfile(): creates a directory is a userfiles dir
9337:
9338: Args:
9339: docuname: username or courseid of destination for the file
9340: docudom: domain of user/course of destination for the file
9341: dir: dir to create (including any subdirs under userfiles)
9342:
9343: =item *
9344:
9345: removeuserfile(): removes a file that exists in userfiles
9346:
9347: Args:
9348: docuname: username or courseid of destination for the file
9349: docudom: domain of user/course of destination for the file
9350: fname: filname to delete (including any subdirs under userfiles)
9351:
9352: =item *
9353:
9354: removeuploadedurl(): convience function for removeuserfile()
9355:
9356: Args:
9357: url: a full /uploaded/... url to delete
9358:
9359: =item *
9360:
9361: get_portfile_permissions():
9362: Args:
9363: domain: domain of user or course contain the portfolio files
9364: user: name of user or num of course contain the portfolio files
9365: Returns:
9366: hashref of a dump of the proper file_permissions.db
9367:
9368:
9369: =item *
9370:
9371: get_access_controls():
9372:
9373: Args:
9374: current_permissions: the hash ref returned from get_portfile_permissions()
9375: group: (optional) the group you want the files associated with
9376: file: (optional) the file you want access info on
9377:
9378: Returns:
9379: a hash (keys are file names) of hashes containing
9380: keys are: path to file/file_name\0uniqueID:scope_end_start (see below)
9381: values are XML containing access control settings (see below)
9382:
9383: Internal notes:
9384:
9385: access controls are stored in file_permissions.db as key=value pairs.
9386: key -> path to file/file_name\0uniqueID:scope_end_start
9387: where scope -> public,guest,course,group,domains or users.
9388: end -> UNIX time for end of access (0 -> no end date)
9389: start -> UNIX time for start of access
9390:
9391: value -> XML description of access control
9392: <scope type=""> (type =1 of: public,guest,course,group,domains,users">
9393: <start></start>
9394: <end></end>
9395:
9396: <password></password> for scope type = guest
9397:
9398: <domain></domain> for scope type = course or group
9399: <number></number>
9400: <roles id="">
9401: <role></role>
9402: <access></access>
9403: <section></section>
9404: <group></group>
9405: </roles>
9406:
9407: <dom></dom> for scope type = domains
9408:
9409: <users> for scope type = users
9410: <user>
9411: <uname></uname>
9412: <udom></udom>
9413: </user>
9414: </users>
9415: </scope>
9416:
9417: Access data is also aggregated for each file in an additional key=value pair:
9418: key -> path to file/file_name\0accesscontrol
9419: value -> reference to hash
9420: hash contains key = value pairs
9421: where key = uniqueID:scope_end_start
9422: value = UNIX time record was last updated
9423:
9424: Used to improve speed of look-ups of access controls for each file.
9425:
9426: Locks on files (resulting from submission of portfolio file to a homework problem stored in array of arrays.
9427:
9428: modify_access_controls():
9429:
9430: Modifies access controls for a portfolio file
9431: Args
9432: 1. file name
9433: 2. reference to hash of required changes,
9434: 3. domain
9435: 4. username
9436: where domain,username are the domain of the portfolio owner
9437: (either a user or a course)
9438:
9439: Returns:
9440: 1. result of additions or updates ('ok' or 'error', with error message).
9441: 2. result of deletions ('ok' or 'error', with error message).
9442: 3. reference to hash of any new or updated access controls.
9443: 4. reference to hash used to map incoming IDs to uniqueIDs assigned to control.
9444: key = integer (inbound ID)
9445: value = uniqueID
9446:
9447: =back
9448:
9449: =head2 HTTP Helper Routines
9450:
9451: =over 4
9452:
9453: =item *
9454:
9455: escape() : unpack non-word characters into CGI-compatible hex codes
9456:
9457: =item *
9458:
9459: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
9460:
9461: =back
9462:
9463: =head1 PRIVATE SUBROUTINES
9464:
9465: =head2 Underlying communication routines (Shouldn't call)
9466:
9467: =over 4
9468:
9469: =item *
9470:
9471: subreply() : tries to pass a message to lonc, returns con_lost if incapable
9472:
9473: =item *
9474:
9475: reply() : uses subreply to send a message to remote machine, logs all failures
9476:
9477: =item *
9478:
9479: critical() : passes a critical message to another server; if cannot
9480: get through then place message in connection buffer directory and
9481: returns con_delayed, if incapable of saving message, returns
9482: con_failed
9483:
9484: =item *
9485:
9486: reconlonc() : tries to reconnect lonc client processes.
9487:
9488: =back
9489:
9490: =head2 Resource Access Logging
9491:
9492: =over 4
9493:
9494: =item *
9495:
9496: flushcourselogs() : flush (save) buffer logs and access logs
9497:
9498: =item *
9499:
9500: courselog($what) : save message for course in hash
9501:
9502: =item *
9503:
9504: courseacclog($what) : save message for course using &courselog(). Perform
9505: special processing for specific resource types (problems, exams, quizzes, etc).
9506:
9507: =item *
9508:
9509: goodbye() : flush course logs and log shutting down; it is called in srm.conf
9510: as a PerlChildExitHandler
9511:
9512: =back
9513:
9514: =head2 Other
9515:
9516: =over 4
9517:
9518: =item *
9519:
9520: symblist($mapname,%newhash) : update symbolic storage links
9521:
9522: =back
9523:
9524: =cut
9525:
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