1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.843 2007/03/03 02:10:59 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::Headers;
35: use HTTP::Date;
36: # use Date::Parse;
37: use vars
38: qw(%perlvar %badServerCache %iphost %spareid %hostdom
39: %libserv %pr %prp $memcache %packagetab
40: %courselogs %accesshash %userrolehash %domainrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf %coursetypebuf
42: %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati %domain_primary
44: $tmpdir $_64bit %env);
45:
46: use IO::Socket;
47: use GDBM_File;
48: use HTML::LCParser;
49: use HTML::Parser;
50: use Fcntl qw(:flock);
51: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
52: use Time::HiRes qw( gettimeofday tv_interval );
53: use Cache::Memcached;
54: use Digest::MD5;
55: use Math::Random;
56: use LONCAPA qw(:DEFAULT :match);
57: use LONCAPA::Configuration;
58:
59: my $readit;
60: my $max_connection_retries = 10; # Or some such value.
61:
62: require Exporter;
63:
64: our @ISA = qw (Exporter);
65: our @EXPORT = qw(%env);
66:
67: =pod
68:
69: =head1 Package Variables
70:
71: These are largely undocumented, so if you decipher one please note it here.
72:
73: =over 4
74:
75: =item $processmarker
76:
77: Contains the time this process was started and this servers host id.
78:
79: =item $dumpcount
80:
81: Counts the number of times a message log flush has been attempted (regardless
82: of success) by this process. Used as part of the filename when messages are
83: delayed.
84:
85: =back
86:
87: =cut
88:
89:
90: # --------------------------------------------------------------------- Logging
91: {
92: my $logid;
93: sub instructor_log {
94: my ($hash_name,$storehash,$delflag,$uname,$udom)=@_;
95: $logid++;
96: my $id=time().'00000'.$$.'00000'.$logid;
97: return &Apache::lonnet::put('nohist_'.$hash_name,
98: { $id => {
99: 'exe_uname' => $env{'user.name'},
100: 'exe_udom' => $env{'user.domain'},
101: 'exe_time' => time(),
102: 'exe_ip' => $ENV{'REMOTE_ADDR'},
103: 'delflag' => $delflag,
104: 'logentry' => $storehash,
105: 'uname' => $uname,
106: 'udom' => $udom,
107: }
108: },
109: $env{'course.'.$env{'request.course.id'}.'.domain'},
110: $env{'course.'.$env{'request.course.id'}.'.num'}
111: );
112: }
113: }
114:
115: sub logtouch {
116: my $execdir=$perlvar{'lonDaemons'};
117: unless (-e "$execdir/logs/lonnet.log") {
118: open(my $fh,">>$execdir/logs/lonnet.log");
119: close $fh;
120: }
121: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
122: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
123: }
124:
125: sub logthis {
126: my $message=shift;
127: my $execdir=$perlvar{'lonDaemons'};
128: my $now=time;
129: my $local=localtime($now);
130: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
131: print $fh "$local ($$): $message\n";
132: close($fh);
133: }
134: return 1;
135: }
136:
137: sub logperm {
138: my $message=shift;
139: my $execdir=$perlvar{'lonDaemons'};
140: my $now=time;
141: my $local=localtime($now);
142: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
143: print $fh "$now:$message:$local\n";
144: close($fh);
145: }
146: return 1;
147: }
148:
149: # -------------------------------------------------- Non-critical communication
150: sub subreply {
151: my ($cmd,$server)=@_;
152: my $peerfile="$perlvar{'lonSockDir'}/".&hostname($server);
153: #
154: # With loncnew process trimming, there's a timing hole between lonc server
155: # process exit and the master server picking up the listen on the AF_UNIX
156: # socket. In that time interval, a lock file will exist:
157:
158: my $lockfile=$peerfile.".lock";
159: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
160: sleep(1);
161: }
162: # At this point, either a loncnew parent is listening or an old lonc
163: # or loncnew child is listening so we can connect or everything's dead.
164: #
165: # We'll give the connection a few tries before abandoning it. If
166: # connection is not possible, we'll con_lost back to the client.
167: #
168: my $client;
169: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
170: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
171: Type => SOCK_STREAM,
172: Timeout => 10);
173: if($client) {
174: last; # Connected!
175: }
176: sleep(1); # Try again later if failed connection.
177: }
178: my $answer;
179: if ($client) {
180: print $client "sethost:$server:$cmd\n";
181: $answer=<$client>;
182: if (!$answer) { $answer="con_lost"; }
183: chomp($answer);
184: } else {
185: $answer = 'con_lost'; # Failed connection.
186: }
187: return $answer;
188: }
189:
190: sub reply {
191: my ($cmd,$server)=@_;
192: unless (defined(&hostname($server))) { return 'no_such_host'; }
193: my $answer=subreply($cmd,$server);
194: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
195: &logthis("<font color=\"blue\">WARNING:".
196: " $cmd to $server returned $answer</font>");
197: }
198: return $answer;
199: }
200:
201: # ----------------------------------------------------------- Send USR1 to lonc
202:
203: sub reconlonc {
204: &logthis("Trying to reconnect lonc");
205: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
206: if (open(my $fh,"<$loncfile")) {
207: my $loncpid=<$fh>;
208: chomp($loncpid);
209: if (kill 0 => $loncpid) {
210: &logthis("lonc at pid $loncpid responding, sending USR1");
211: kill USR1 => $loncpid;
212: sleep 1;
213: } else {
214: &logthis(
215: "<font color=\"blue\">WARNING:".
216: " lonc at pid $loncpid not responding, giving up</font>");
217: }
218: } else {
219: &logthis('<font color="blue">WARNING: lonc not running, giving up</font>');
220: }
221: }
222:
223: # ------------------------------------------------------ Critical communication
224:
225: sub critical {
226: my ($cmd,$server)=@_;
227: unless (&hostname($server)) {
228: &logthis("<font color=\"blue\">WARNING:".
229: " Critical message to unknown server ($server)</font>");
230: return 'no_such_host';
231: }
232: my $answer=reply($cmd,$server);
233: if ($answer eq 'con_lost') {
234: &reconlonc("$perlvar{'lonSockDir'}/$server");
235: my $answer=reply($cmd,$server);
236: if ($answer eq 'con_lost') {
237: my $now=time;
238: my $middlename=$cmd;
239: $middlename=substr($middlename,0,16);
240: $middlename=~s/\W//g;
241: my $dfilename=
242: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
243: $dumpcount++;
244: {
245: my $dfh;
246: if (open($dfh,">$dfilename")) {
247: print $dfh "$cmd\n";
248: close($dfh);
249: }
250: }
251: sleep 2;
252: my $wcmd='';
253: {
254: my $dfh;
255: if (open($dfh,"<$dfilename")) {
256: $wcmd=<$dfh>;
257: close($dfh);
258: }
259: }
260: chomp($wcmd);
261: if ($wcmd eq $cmd) {
262: &logthis("<font color=\"blue\">WARNING: ".
263: "Connection buffer $dfilename: $cmd</font>");
264: &logperm("D:$server:$cmd");
265: return 'con_delayed';
266: } else {
267: &logthis("<font color=\"red\">CRITICAL:"
268: ." Critical connection failed: $server $cmd</font>");
269: &logperm("F:$server:$cmd");
270: return 'con_failed';
271: }
272: }
273: }
274: return $answer;
275: }
276:
277: # ------------------------------------------- check if return value is an error
278:
279: sub error {
280: my ($result) = @_;
281: if ($result =~ /^(con_lost|no_such_host|error: (\d+) (.*))/) {
282: if ($2 == 2) { return undef; }
283: return $1;
284: }
285: return undef;
286: }
287:
288: sub convert_and_load_session_env {
289: my ($lonidsdir,$handle)=@_;
290: my @profile;
291: {
292: open(my $idf,"$lonidsdir/$handle.id");
293: flock($idf,LOCK_SH);
294: @profile=<$idf>;
295: close($idf);
296: }
297: my %temp_env;
298: foreach my $line (@profile) {
299: if ($line !~ m/=/) {
300: return 0;
301: }
302: chomp($line);
303: my ($envname,$envvalue)=split(/=/,$line,2);
304: $temp_env{&unescape($envname)} = &unescape($envvalue);
305: }
306: unlink("$lonidsdir/$handle.id");
307: if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",&GDBM_WRCREAT(),
308: 0640)) {
309: %disk_env = %temp_env;
310: @env{keys(%temp_env)} = @disk_env{keys(%temp_env)};
311: untie(%disk_env);
312: }
313: return 1;
314: }
315:
316: # ------------------------------------------- Transfer profile into environment
317: my $env_loaded;
318: sub transfer_profile_to_env {
319: my ($lonidsdir,$handle,$force_transfer) = @_;
320: if (!$force_transfer && $env_loaded) { return; }
321:
322: if (!defined($lonidsdir)) {
323: $lonidsdir = $perlvar{'lonIDsDir'};
324: }
325: if (!defined($handle)) {
326: ($handle) = ($env{'user.environment'} =~m|/([^/]+)\.id$| );
327: }
328:
329: my $convert;
330: {
331: open(my $idf,"$lonidsdir/$handle.id");
332: flock($idf,LOCK_SH);
333: if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",
334: &GDBM_READER(),0640)) {
335: @env{keys(%disk_env)} = @disk_env{keys(%disk_env)};
336: untie(%disk_env);
337: } else {
338: $convert = 1;
339: }
340: }
341: if ($convert) {
342: if (!&convert_and_load_session_env($lonidsdir,$handle)) {
343: &logthis("Failed to load session, or convert session.");
344: }
345: }
346:
347: my %remove;
348: while ( my $envname = each(%env) ) {
349: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
350: if ($time < time-300) {
351: $remove{$key}++;
352: }
353: }
354: }
355:
356: $env{'user.environment'} = "$lonidsdir/$handle.id";
357: $env_loaded=1;
358: foreach my $expired_key (keys(%remove)) {
359: &delenv($expired_key);
360: }
361: }
362:
363: sub timed_flock {
364: my ($file,$lock_type) = @_;
365: my $failed=0;
366: eval {
367: local $SIG{__DIE__}='DEFAULT';
368: local $SIG{ALRM}=sub {
369: $failed=1;
370: die("failed lock");
371: };
372: alarm(13);
373: flock($file,$lock_type);
374: alarm(0);
375: };
376: if ($failed) {
377: return undef;
378: } else {
379: return 1;
380: }
381: }
382:
383: # ---------------------------------------------------------- Append Environment
384:
385: sub appenv {
386: my %newenv=@_;
387: foreach my $key (keys(%newenv)) {
388: if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
389: &logthis("<font color=\"blue\">WARNING: ".
390: "Attempt to modify environment ".$key." to ".$newenv{$key}
391: .'</font>');
392: delete($newenv{$key});
393: } else {
394: $env{$key}=$newenv{$key};
395: }
396: }
397: open(my $env_file,$env{'user.environment'});
398: if (&timed_flock($env_file,LOCK_EX)
399: &&
400: tie(my %disk_env,'GDBM_File',$env{'user.environment'},
401: (&GDBM_WRITER()|&GDBM_NOLOCK()),0640)) {
402: while (my ($key,$value) = each(%newenv)) {
403: $disk_env{$key} = $value;
404: }
405: untie(%disk_env);
406: }
407: return 'ok';
408: }
409: # ----------------------------------------------------- Delete from Environment
410:
411: sub delenv {
412: my $delthis=shift;
413: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
414: &logthis("<font color=\"blue\">WARNING: ".
415: "Attempt to delete from environment ".$delthis);
416: return 'error';
417: }
418: open(my $env_file,$env{'user.environment'});
419: if (&timed_flock($env_file,LOCK_EX)
420: &&
421: tie(my %disk_env,'GDBM_File',$env{'user.environment'},
422: (&GDBM_WRITER()|&GDBM_NOLOCK()),0640)) {
423: foreach my $key (keys(%disk_env)) {
424: if ($key=~/^$delthis/) {
425: delete($env{$key});
426: delete($disk_env{$key});
427: }
428: }
429: untie(%disk_env);
430: }
431: return 'ok';
432: }
433:
434: sub get_env_multiple {
435: my ($name) = @_;
436: my @values;
437: if (defined($env{$name})) {
438: # exists is it an array
439: if (ref($env{$name})) {
440: @values=@{ $env{$name} };
441: } else {
442: $values[0]=$env{$name};
443: }
444: }
445: return(@values);
446: }
447:
448: # ------------------------------------------ Find out current server userload
449: # there is a copy in lond
450: sub userload {
451: my $numusers=0;
452: {
453: opendir(LONIDS,$perlvar{'lonIDsDir'});
454: my $filename;
455: my $curtime=time;
456: while ($filename=readdir(LONIDS)) {
457: if ($filename eq '.' || $filename eq '..') {next;}
458: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
459: if ($curtime-$mtime < 1800) { $numusers++; }
460: }
461: closedir(LONIDS);
462: }
463: my $userloadpercent=0;
464: my $maxuserload=$perlvar{'lonUserLoadLim'};
465: if ($maxuserload) {
466: $userloadpercent=100*$numusers/$maxuserload;
467: }
468: $userloadpercent=sprintf("%.2f",$userloadpercent);
469: return $userloadpercent;
470: }
471:
472: # ------------------------------------------ Fight off request when overloaded
473:
474: sub overloaderror {
475: my ($r,$checkserver)=@_;
476: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
477: my $loadavg;
478: if ($checkserver eq $perlvar{'lonHostID'}) {
479: open(my $loadfile,'/proc/loadavg');
480: $loadavg=<$loadfile>;
481: $loadavg =~ s/\s.*//g;
482: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
483: close($loadfile);
484: } else {
485: $loadavg=&reply('load',$checkserver);
486: }
487: my $overload=$loadavg-100;
488: if ($overload>0) {
489: $r->err_headers_out->{'Retry-After'}=$overload;
490: $r->log_error('Overload of '.$overload.' on '.$checkserver);
491: return 413;
492: }
493: return '';
494: }
495:
496: # ------------------------------ Find server with least workload from spare.tab
497:
498: sub spareserver {
499: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
500: my $spare_server;
501: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
502: my $lowest_load=($loadpercent > $userloadpercent) ? $loadpercent
503: : $userloadpercent;
504:
505: foreach my $try_server (@{ $spareid{'primary'} }) {
506: ($spare_server, $lowest_load) =
507: &compare_server_load($try_server, $spare_server, $lowest_load);
508: }
509:
510: my $found_server = ($spare_server ne '' && $lowest_load < 100);
511:
512: if (!$found_server) {
513: foreach my $try_server (@{ $spareid{'default'} }) {
514: ($spare_server, $lowest_load) =
515: &compare_server_load($try_server, $spare_server, $lowest_load);
516: }
517: }
518:
519: if (!$want_server_name) {
520: $spare_server="http://".&hostname($spare_server);
521: }
522: return $spare_server;
523: }
524:
525: sub compare_server_load {
526: my ($try_server, $spare_server, $lowest_load) = @_;
527:
528: my $loadans = &reply('load', $try_server);
529: my $userloadans = &reply('userload',$try_server);
530:
531: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
532: next; #didn't get a number from the server
533: }
534:
535: my $load;
536: if ($loadans =~ /\d/) {
537: if ($userloadans =~ /\d/) {
538: #both are numbers, pick the bigger one
539: $load = ($loadans > $userloadans) ? $loadans
540: : $userloadans;
541: } else {
542: $load = $loadans;
543: }
544: } else {
545: $load = $userloadans;
546: }
547:
548: if (($load =~ /\d/) && ($load < $lowest_load)) {
549: $spare_server = $try_server;
550: $lowest_load = $load;
551: }
552: return ($spare_server,$lowest_load);
553: }
554: # --------------------------------------------- Try to change a user's password
555:
556: sub changepass {
557: my ($uname,$udom,$currentpass,$newpass,$server,$context)=@_;
558: $currentpass = &escape($currentpass);
559: $newpass = &escape($newpass);
560: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass:$context",
561: $server);
562: if (! $answer) {
563: &logthis("No reply on password change request to $server ".
564: "by $uname in domain $udom.");
565: } elsif ($answer =~ "^ok") {
566: &logthis("$uname in $udom successfully changed their password ".
567: "on $server.");
568: } elsif ($answer =~ "^pwchange_failure") {
569: &logthis("$uname in $udom was unable to change their password ".
570: "on $server. The action was blocked by either lcpasswd ".
571: "or pwchange");
572: } elsif ($answer =~ "^non_authorized") {
573: &logthis("$uname in $udom did not get their password correct when ".
574: "attempting to change it on $server.");
575: } elsif ($answer =~ "^auth_mode_error") {
576: &logthis("$uname in $udom attempted to change their password despite ".
577: "not being locally or internally authenticated on $server.");
578: } elsif ($answer =~ "^unknown_user") {
579: &logthis("$uname in $udom attempted to change their password ".
580: "on $server but were unable to because $server is not ".
581: "their home server.");
582: } elsif ($answer =~ "^refused") {
583: &logthis("$server refused to change $uname in $udom password because ".
584: "it was sent an unencrypted request to change the password.");
585: }
586: return $answer;
587: }
588:
589: # ----------------------- Try to determine user's current authentication scheme
590:
591: sub queryauthenticate {
592: my ($uname,$udom)=@_;
593: my $uhome=&homeserver($uname,$udom);
594: if (!$uhome) {
595: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
596: return 'no_host';
597: }
598: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
599: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
600: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
601: }
602: return $answer;
603: }
604:
605: # --------- Try to authenticate user from domain's lib servers (first this one)
606:
607: sub authenticate {
608: my ($uname,$upass,$udom)=@_;
609: $upass=&escape($upass);
610: $uname= &LONCAPA::clean_username($uname);
611: my $uhome=&homeserver($uname,$udom,1);
612: if ((!$uhome) || ($uhome eq 'no_host')) {
613: # Maybe the machine was offline and only re-appeared again recently?
614: &reconlonc();
615: # One more
616: my $uhome=&homeserver($uname,$udom,1);
617: if ((!$uhome) || ($uhome eq 'no_host')) {
618: &logthis("User $uname at $udom is unknown in authenticate");
619: }
620: return 'no_host';
621: }
622: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
623: if ($answer eq 'authorized') {
624: &logthis("User $uname at $udom authorized by $uhome");
625: return $uhome;
626: }
627: if ($answer eq 'non_authorized') {
628: &logthis("User $uname at $udom rejected by $uhome");
629: return 'no_host';
630: }
631: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
632: return 'no_host';
633: }
634:
635: # ---------------------- Find the homebase for a user from domain's lib servers
636:
637: my %homecache;
638: sub homeserver {
639: my ($uname,$udom,$ignoreBadCache)=@_;
640: my $index="$uname:$udom";
641:
642: if (exists($homecache{$index})) { return $homecache{$index}; }
643:
644: my %servers = &get_servers($udom,'library');
645: foreach my $tryserver (keys(%servers)) {
646: next if ($ignoreBadCache ne 'true' &&
647: exists($badServerCache{$tryserver}));
648:
649: my $answer=reply("home:$udom:$uname",$tryserver);
650: if ($answer eq 'found') {
651: delete($badServerCache{$tryserver});
652: return $homecache{$index}=$tryserver;
653: } elsif ($answer eq 'no_host') {
654: $badServerCache{$tryserver}=1;
655: }
656: }
657: return 'no_host';
658: }
659:
660: # ------------------------------------- Find the usernames behind a list of IDs
661:
662: sub idget {
663: my ($udom,@ids)=@_;
664: my %returnhash=();
665:
666: my %servers = &get_servers($udom,'library');
667: foreach my $tryserver (keys(%servers)) {
668: my $idlist=join('&',@ids);
669: $idlist=~tr/A-Z/a-z/;
670: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
671: my @answer=();
672: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
673: @answer=split(/\&/,$reply);
674: } ;
675: my $i;
676: for ($i=0;$i<=$#ids;$i++) {
677: if ($answer[$i]) {
678: $returnhash{$ids[$i]}=$answer[$i];
679: }
680: }
681: }
682: return %returnhash;
683: }
684:
685: # ------------------------------------- Find the IDs behind a list of usernames
686:
687: sub idrget {
688: my ($udom,@unames)=@_;
689: my %returnhash=();
690: foreach my $uname (@unames) {
691: $returnhash{$uname}=(&userenvironment($udom,$uname,'id'))[1];
692: }
693: return %returnhash;
694: }
695:
696: # ------------------------------- Store away a list of names and associated IDs
697:
698: sub idput {
699: my ($udom,%ids)=@_;
700: my %servers=();
701: foreach my $uname (keys(%ids)) {
702: &cput('environment',{'id'=>$ids{$uname}},$udom,$uname);
703: my $uhom=&homeserver($uname,$udom);
704: if ($uhom ne 'no_host') {
705: my $id=&escape($ids{$uname});
706: $id=~tr/A-Z/a-z/;
707: my $esc_unam=&escape($uname);
708: if ($servers{$uhom}) {
709: $servers{$uhom}.='&'.$id.'='.$esc_unam;
710: } else {
711: $servers{$uhom}=$id.'='.$esc_unam;
712: }
713: }
714: }
715: foreach my $server (keys(%servers)) {
716: &critical('idput:'.$udom.':'.$servers{$server},$server);
717: }
718: }
719:
720: # ------------------------------------------- get items from domain db files
721:
722: sub get_dom {
723: my ($namespace,$storearr,$udom)=@_;
724: my $items='';
725: foreach my $item (@$storearr) {
726: $items.=&escape($item).'&';
727: }
728: $items=~s/\&$//;
729: if (!$udom) { $udom=$env{'user.domain'}; }
730: if (exists($domain_primary{$udom})) {
731: my $uhome=$domain_primary{$udom};
732: my $rep=&reply("getdom:$udom:$namespace:$items",$uhome);
733: my @pairs=split(/\&/,$rep);
734: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
735: return @pairs;
736: }
737: my %returnhash=();
738: my $i=0;
739: foreach my $item (@$storearr) {
740: $returnhash{$item}=&thaw_unescape($pairs[$i]);
741: $i++;
742: }
743: return %returnhash;
744: } else {
745: &logthis("get_dom failed - no primary domain server for $udom");
746: }
747: }
748:
749: # -------------------------------------------- put items in domain db files
750:
751: sub put_dom {
752: my ($namespace,$storehash,$udom)=@_;
753: if (!$udom) { $udom=$env{'user.domain'}; }
754: if (exists($domain_primary{$udom})) {
755: my $uhome=$domain_primary{$udom};
756: my $items='';
757: foreach my $item (keys(%$storehash)) {
758: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
759: }
760: $items=~s/\&$//;
761: return &reply("putdom:$udom:$namespace:$items",$uhome);
762: } else {
763: &logthis("put_dom failed - no primary domain server for $udom");
764: }
765: }
766:
767: sub retrieve_inst_usertypes {
768: my ($udom) = @_;
769: my (%returnhash,@order);
770: if (exists($domain_primary{$udom})) {
771: my $uhome=$domain_primary{$udom};
772: my $rep=&reply("inst_usertypes:$udom",$uhome);
773: my ($hashitems,$orderitems) = split(/:/,$rep);
774: my @pairs=split(/\&/,$hashitems);
775: foreach my $item (@pairs) {
776: my ($key,$value)=split(/=/,$item,2);
777: $key = &unescape($key);
778: next if ($key =~ /^error: 2 /);
779: $returnhash{$key}=&thaw_unescape($value);
780: }
781: my @esc_order = split(/\&/,$orderitems);
782: foreach my $item (@esc_order) {
783: push(@order,&unescape($item));
784: }
785: } else {
786: &logthis("get_dom failed - no primary domain server for $udom");
787: }
788: return (\%returnhash,\@order);
789: }
790:
791: # --------------------------------------------------- Assign a key to a student
792:
793: sub assign_access_key {
794: #
795: # a valid key looks like uname:udom#comments
796: # comments are being appended
797: #
798: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
799: $kdom=
800: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
801: $knum=
802: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
803: $cdom=
804: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
805: $cnum=
806: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
807: $udom=$env{'user.name'} unless (defined($udom));
808: $uname=$env{'user.domain'} unless (defined($uname));
809: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
810: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
811: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
812: # assigned to this person
813: # - this should not happen,
814: # unless something went wrong
815: # the first time around
816: # ready to assign
817: $logentry=$1.'; '.$logentry;
818: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
819: $kdom,$knum) eq 'ok') {
820: # key now belongs to user
821: my $envkey='key.'.$cdom.'_'.$cnum;
822: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
823: &appenv('environment.'.$envkey => $ckey);
824: return 'ok';
825: } else {
826: return
827: 'error: Count not permanently assign key, will need to be re-entered later.';
828: }
829: } else {
830: return 'error: Could not assign key, try again later.';
831: }
832: } elsif (!$existing{$ckey}) {
833: # the key does not exist
834: return 'error: The key does not exist';
835: } else {
836: # the key is somebody else's
837: return 'error: The key is already in use';
838: }
839: }
840:
841: # ------------------------------------------ put an additional comment on a key
842:
843: sub comment_access_key {
844: #
845: # a valid key looks like uname:udom#comments
846: # comments are being appended
847: #
848: my ($ckey,$cdom,$cnum,$logentry)=@_;
849: $cdom=
850: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
851: $cnum=
852: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
853: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
854: if ($existing{$ckey}) {
855: $existing{$ckey}.='; '.$logentry;
856: # ready to assign
857: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
858: $cdom,$cnum) eq 'ok') {
859: return 'ok';
860: } else {
861: return 'error: Count not store comment.';
862: }
863: } else {
864: # the key does not exist
865: return 'error: The key does not exist';
866: }
867: }
868:
869: # ------------------------------------------------------ Generate a set of keys
870:
871: sub generate_access_keys {
872: my ($number,$cdom,$cnum,$logentry)=@_;
873: $cdom=
874: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
875: $cnum=
876: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
877: unless (&allowed('mky',$cdom)) { return 0; }
878: unless (($cdom) && ($cnum)) { return 0; }
879: if ($number>10000) { return 0; }
880: sleep(2); # make sure don't get same seed twice
881: srand(time()^($$+($$<<15))); # from "Programming Perl"
882: my $total=0;
883: for (my $i=1;$i<=$number;$i++) {
884: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
885: sprintf("%lx",int(100000*rand)).'-'.
886: sprintf("%lx",int(100000*rand));
887: $newkey=~s/1/g/g; # folks mix up 1 and l
888: $newkey=~s/0/h/g; # and also 0 and O
889: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
890: if ($existing{$newkey}) {
891: $i--;
892: } else {
893: if (&put('accesskeys',
894: { $newkey => '# generated '.localtime().
895: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
896: '; '.$logentry },
897: $cdom,$cnum) eq 'ok') {
898: $total++;
899: }
900: }
901: }
902: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
903: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
904: return $total;
905: }
906:
907: # ------------------------------------------------------- Validate an accesskey
908:
909: sub validate_access_key {
910: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
911: $cdom=
912: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
913: $cnum=
914: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
915: $udom=$env{'user.domain'} unless (defined($udom));
916: $uname=$env{'user.name'} unless (defined($uname));
917: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
918: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
919: }
920:
921: # ------------------------------------- Find the section of student in a course
922: sub devalidate_getsection_cache {
923: my ($udom,$unam,$courseid)=@_;
924: my $hashid="$udom:$unam:$courseid";
925: &devalidate_cache_new('getsection',$hashid);
926: }
927:
928: sub courseid_to_courseurl {
929: my ($courseid) = @_;
930: #already url style courseid
931: return $courseid if ($courseid =~ m{^/});
932:
933: if (exists($env{'course.'.$courseid.'.num'})) {
934: my $cnum = $env{'course.'.$courseid.'.num'};
935: my $cdom = $env{'course.'.$courseid.'.domain'};
936: return "/$cdom/$cnum";
937: }
938:
939: my %courseinfo=&Apache::lonnet::coursedescription($courseid);
940: if (exists($courseinfo{'num'})) {
941: return "/$courseinfo{'domain'}/$courseinfo{'num'}";
942: }
943:
944: return undef;
945: }
946:
947: sub getsection {
948: my ($udom,$unam,$courseid)=@_;
949: my $cachetime=1800;
950:
951: my $hashid="$udom:$unam:$courseid";
952: my ($result,$cached)=&is_cached_new('getsection',$hashid);
953: if (defined($cached)) { return $result; }
954:
955: my %Pending;
956: my %Expired;
957: #
958: # Each role can either have not started yet (pending), be active,
959: # or have expired.
960: #
961: # If there is an active role, we are done.
962: #
963: # If there is more than one role which has not started yet,
964: # choose the one which will start sooner
965: # If there is one role which has not started yet, return it.
966: #
967: # If there is more than one expired role, choose the one which ended last.
968: # If there is a role which has expired, return it.
969: #
970: $courseid = &courseid_to_courseurl($courseid);
971: my %roleshash = &dump('roles',$udom,$unam,$courseid);
972: foreach my $key (keys(%roleshash)) {
973: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
974: my $section=$1;
975: if ($key eq $courseid.'_st') { $section=''; }
976: my ($dummy,$end,$start)=split(/\_/,&unescape($roleshash{$key}));
977: my $now=time;
978: if (defined($end) && $end && ($now > $end)) {
979: $Expired{$end}=$section;
980: next;
981: }
982: if (defined($start) && $start && ($now < $start)) {
983: $Pending{$start}=$section;
984: next;
985: }
986: return &do_cache_new('getsection',$hashid,$section,$cachetime);
987: }
988: #
989: # Presumedly there will be few matching roles from the above
990: # loop and the sorting time will be negligible.
991: if (scalar(keys(%Pending))) {
992: my ($time) = sort {$a <=> $b} keys(%Pending);
993: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
994: }
995: if (scalar(keys(%Expired))) {
996: my @sorted = sort {$a <=> $b} keys(%Expired);
997: my $time = pop(@sorted);
998: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
999: }
1000: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
1001: }
1002:
1003: sub save_cache {
1004: &purge_remembered();
1005: #&Apache::loncommon::validate_page();
1006: undef(%env);
1007: undef($env_loaded);
1008: }
1009:
1010: my $to_remember=-1;
1011: my %remembered;
1012: my %accessed;
1013: my $kicks=0;
1014: my $hits=0;
1015: sub devalidate_cache_new {
1016: my ($name,$id,$debug) = @_;
1017: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
1018: $id=&escape($name.':'.$id);
1019: $memcache->delete($id);
1020: delete($remembered{$id});
1021: delete($accessed{$id});
1022: }
1023:
1024: sub is_cached_new {
1025: my ($name,$id,$debug) = @_;
1026: $id=&escape($name.':'.$id);
1027: if (exists($remembered{$id})) {
1028: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
1029: $accessed{$id}=[&gettimeofday()];
1030: $hits++;
1031: return ($remembered{$id},1);
1032: }
1033: my $value = $memcache->get($id);
1034: if (!(defined($value))) {
1035: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
1036: return (undef,undef);
1037: }
1038: if ($value eq '__undef__') {
1039: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
1040: $value=undef;
1041: }
1042: &make_room($id,$value,$debug);
1043: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
1044: return ($value,1);
1045: }
1046:
1047: sub do_cache_new {
1048: my ($name,$id,$value,$time,$debug) = @_;
1049: $id=&escape($name.':'.$id);
1050: my $setvalue=$value;
1051: if (!defined($setvalue)) {
1052: $setvalue='__undef__';
1053: }
1054: if (!defined($time) ) {
1055: $time=600;
1056: }
1057: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
1058: $memcache->set($id,$setvalue,$time);
1059: # need to make a copy of $value
1060: #&make_room($id,$value,$debug);
1061: return $value;
1062: }
1063:
1064: sub make_room {
1065: my ($id,$value,$debug)=@_;
1066: $remembered{$id}=$value;
1067: if ($to_remember<0) { return; }
1068: $accessed{$id}=[&gettimeofday()];
1069: if (scalar(keys(%remembered)) <= $to_remember) { return; }
1070: my $to_kick;
1071: my $max_time=0;
1072: foreach my $other (keys(%accessed)) {
1073: if (&tv_interval($accessed{$other}) > $max_time) {
1074: $to_kick=$other;
1075: $max_time=&tv_interval($accessed{$other});
1076: }
1077: }
1078: delete($remembered{$to_kick});
1079: delete($accessed{$to_kick});
1080: $kicks++;
1081: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
1082: return;
1083: }
1084:
1085: sub purge_remembered {
1086: #&logthis("Tossing ".scalar(keys(%remembered)));
1087: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
1088: undef(%remembered);
1089: undef(%accessed);
1090: }
1091: # ------------------------------------- Read an entry from a user's environment
1092:
1093: sub userenvironment {
1094: my ($udom,$unam,@what)=@_;
1095: my %returnhash=();
1096: my @answer=split(/\&/,
1097: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1098: &homeserver($unam,$udom)));
1099: my $i;
1100: for ($i=0;$i<=$#what;$i++) {
1101: $returnhash{$what[$i]}=&unescape($answer[$i]);
1102: }
1103: return %returnhash;
1104: }
1105:
1106: # ---------------------------------------------------------- Get a studentphoto
1107: sub studentphoto {
1108: my ($udom,$unam,$ext) = @_;
1109: my $home=&Apache::lonnet::homeserver($unam,$udom);
1110: if (defined($env{'request.course.id'})) {
1111: if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
1112: if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
1113: return(&retrievestudentphoto($udom,$unam,$ext));
1114: } else {
1115: my ($result,$perm_reqd)=
1116: &Apache::lonnet::auto_photo_permission($unam,$udom);
1117: if ($result eq 'ok') {
1118: if (!($perm_reqd eq 'yes')) {
1119: return(&retrievestudentphoto($udom,$unam,$ext));
1120: }
1121: }
1122: }
1123: }
1124: } else {
1125: my ($result,$perm_reqd) =
1126: &Apache::lonnet::auto_photo_permission($unam,$udom);
1127: if ($result eq 'ok') {
1128: if (!($perm_reqd eq 'yes')) {
1129: return(&retrievestudentphoto($udom,$unam,$ext));
1130: }
1131: }
1132: }
1133: return '/adm/lonKaputt/lonlogo_broken.gif';
1134: }
1135:
1136: sub retrievestudentphoto {
1137: my ($udom,$unam,$ext,$type) = @_;
1138: my $home=&Apache::lonnet::homeserver($unam,$udom);
1139: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
1140: if ($ret eq 'ok') {
1141: my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
1142: if ($type eq 'thumbnail') {
1143: $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
1144: }
1145: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
1146: return $tokenurl;
1147: } else {
1148: if ($type eq 'thumbnail') {
1149: return '/adm/lonKaputt/genericstudent_tn.gif';
1150: } else {
1151: return '/adm/lonKaputt/lonlogo_broken.gif';
1152: }
1153: }
1154: }
1155:
1156: # -------------------------------------------------------------------- New chat
1157:
1158: sub chatsend {
1159: my ($newentry,$anon,$group)=@_;
1160: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1161: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1162: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1163: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1164: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
1165: &escape($newentry)).':'.$group,$chome);
1166: }
1167:
1168: # ------------------------------------------ Find current version of a resource
1169:
1170: sub getversion {
1171: my $fname=&clutter(shift);
1172: unless ($fname=~/^\/res\//) { return -1; }
1173: return ¤tversion(&filelocation('',$fname));
1174: }
1175:
1176: sub currentversion {
1177: my $fname=shift;
1178: my ($result,$cached)=&is_cached_new('resversion',$fname);
1179: if (defined($cached)) { return $result; }
1180: my $author=$fname;
1181: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1182: my ($udom,$uname)=split(/\//,$author);
1183: my $home=homeserver($uname,$udom);
1184: if ($home eq 'no_host') {
1185: return -1;
1186: }
1187: my $answer=reply("currentversion:$fname",$home);
1188: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1189: return -1;
1190: }
1191: return &do_cache_new('resversion',$fname,$answer,600);
1192: }
1193:
1194: # ----------------------------- Subscribe to a resource, return URL if possible
1195:
1196: sub subscribe {
1197: my $fname=shift;
1198: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1199: $fname=~s/[\n\r]//g;
1200: my $author=$fname;
1201: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1202: my ($udom,$uname)=split(/\//,$author);
1203: my $home=homeserver($uname,$udom);
1204: if ($home eq 'no_host') {
1205: return 'not_found';
1206: }
1207: my $answer=reply("sub:$fname",$home);
1208: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1209: $answer.=' by '.$home;
1210: }
1211: return $answer;
1212: }
1213:
1214: # -------------------------------------------------------------- Replicate file
1215:
1216: sub repcopy {
1217: my $filename=shift;
1218: $filename=~s/\/+/\//g;
1219: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1220: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1221: if ($filename=~m|^/home/httpd/html/userfiles/| or
1222: $filename=~m -^/*(uploaded|editupload)/-) {
1223: return &repcopy_userfile($filename);
1224: }
1225: $filename=~s/[\n\r]//g;
1226: my $transname="$filename.in.transfer";
1227: # FIXME: this should flock
1228: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1229: my $remoteurl=subscribe($filename);
1230: if ($remoteurl =~ /^con_lost by/) {
1231: &logthis("Subscribe returned $remoteurl: $filename");
1232: return 'unavailable';
1233: } elsif ($remoteurl eq 'not_found') {
1234: #&logthis("Subscribe returned not_found: $filename");
1235: return 'not_found';
1236: } elsif ($remoteurl =~ /^rejected by/) {
1237: &logthis("Subscribe returned $remoteurl: $filename");
1238: return 'forbidden';
1239: } elsif ($remoteurl eq 'directory') {
1240: return 'ok';
1241: } else {
1242: my $author=$filename;
1243: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1244: my ($udom,$uname)=split(/\//,$author);
1245: my $home=homeserver($uname,$udom);
1246: unless ($home eq $perlvar{'lonHostID'}) {
1247: my @parts=split(/\//,$filename);
1248: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1249: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1250: &logthis("Malconfiguration for replication: $filename");
1251: return 'bad_request';
1252: }
1253: my $count;
1254: for ($count=5;$count<$#parts;$count++) {
1255: $path.="/$parts[$count]";
1256: if ((-e $path)!=1) {
1257: mkdir($path,0777);
1258: }
1259: }
1260: my $ua=new LWP::UserAgent;
1261: my $request=new HTTP::Request('GET',"$remoteurl");
1262: my $response=$ua->request($request,$transname);
1263: if ($response->is_error()) {
1264: unlink($transname);
1265: my $message=$response->status_line;
1266: &logthis("<font color=\"blue\">WARNING:"
1267: ." LWP get: $message: $filename</font>");
1268: return 'unavailable';
1269: } else {
1270: if ($remoteurl!~/\.meta$/) {
1271: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1272: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1273: if ($mresponse->is_error()) {
1274: unlink($filename.'.meta');
1275: &logthis(
1276: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1277: }
1278: }
1279: rename($transname,$filename);
1280: return 'ok';
1281: }
1282: }
1283: }
1284: }
1285:
1286: # ------------------------------------------------ Get server side include body
1287: sub ssi_body {
1288: my ($filelink,%form)=@_;
1289: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1290: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1291: }
1292: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1293: &ssi($filelink,%form));
1294: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
1295: $output=~s/^.*?\<body[^\>]*\>//si;
1296: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1297: return $output;
1298: }
1299:
1300: # --------------------------------------------------------- Server Side Include
1301:
1302: sub absolute_url {
1303: my ($host_name) = @_;
1304: my $protocol = ($ENV{'SERVER_PORT'} == 443?'https://':'http://');
1305: if ($host_name eq '') {
1306: $host_name = $ENV{'SERVER_NAME'};
1307: }
1308: return $protocol.$host_name;
1309: }
1310:
1311: sub ssi {
1312:
1313: my ($fn,%form)=@_;
1314:
1315: my $ua=new LWP::UserAgent;
1316:
1317: my $request;
1318:
1319: $form{'no_update_last_known'}=1;
1320:
1321: if (%form) {
1322: $request=new HTTP::Request('POST',&absolute_url().$fn);
1323: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1324: } else {
1325: $request=new HTTP::Request('GET',&absolute_url().$fn);
1326: }
1327:
1328: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1329: my $response=$ua->request($request);
1330:
1331: return $response->content;
1332: }
1333:
1334: sub externalssi {
1335: my ($url)=@_;
1336: my $ua=new LWP::UserAgent;
1337: my $request=new HTTP::Request('GET',$url);
1338: my $response=$ua->request($request);
1339: return $response->content;
1340: }
1341:
1342: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1343:
1344: sub allowuploaded {
1345: my ($srcurl,$url)=@_;
1346: $url=&clutter(&declutter($url));
1347: my $dir=$url;
1348: $dir=~s/\/[^\/]+$//;
1349: my %httpref=();
1350: my $httpurl=&hreflocation('',$url);
1351: $httpref{'httpref.'.$httpurl}=$srcurl;
1352: &Apache::lonnet::appenv(%httpref);
1353: }
1354:
1355: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1356: # input: action, courseID, current domain, intended
1357: # path to file, source of file, instruction to parse file for objects,
1358: # ref to hash for embedded objects,
1359: # ref to hash for codebase of java objects.
1360: #
1361: # output: url to file (if action was uploaddoc),
1362: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1363: #
1364: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1365: # course.
1366: #
1367: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1368: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1369: # course's home server.
1370: #
1371: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1372: # be copied from $source (current location) to
1373: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1374: # and will then be copied to
1375: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1376: # course's home server.
1377: #
1378: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1379: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1380: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1381: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1382: # in course's home server.
1383: #
1384:
1385: sub process_coursefile {
1386: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1387: my $fetchresult;
1388: my $home=&homeserver($docuname,$docudom);
1389: if ($action eq 'propagate') {
1390: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1391: $home);
1392: } else {
1393: my $fpath = '';
1394: my $fname = $file;
1395: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1396: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1397: my $filepath = &build_filepath($fpath);
1398: if ($action eq 'copy') {
1399: if ($source eq '') {
1400: $fetchresult = 'no source file';
1401: return $fetchresult;
1402: } else {
1403: my $destination = $filepath.'/'.$fname;
1404: rename($source,$destination);
1405: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1406: $home);
1407: }
1408: } elsif ($action eq 'uploaddoc') {
1409: open(my $fh,'>'.$filepath.'/'.$fname);
1410: print $fh $env{'form.'.$source};
1411: close($fh);
1412: if ($parser eq 'parse') {
1413: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1414: unless ($parse_result eq 'ok') {
1415: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1416: }
1417: }
1418: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1419: $home);
1420: if ($fetchresult eq 'ok') {
1421: return '/uploaded/'.$fpath.'/'.$fname;
1422: } else {
1423: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1424: ' to host '.$home.': '.$fetchresult);
1425: return '/adm/notfound.html';
1426: }
1427: }
1428: }
1429: unless ( $fetchresult eq 'ok') {
1430: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1431: ' to host '.$home.': '.$fetchresult);
1432: }
1433: return $fetchresult;
1434: }
1435:
1436: sub build_filepath {
1437: my ($fpath) = @_;
1438: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1439: unless ($fpath eq '') {
1440: my @parts=split('/',$fpath);
1441: foreach my $part (@parts) {
1442: $filepath.= '/'.$part;
1443: if ((-e $filepath)!=1) {
1444: mkdir($filepath,0777);
1445: }
1446: }
1447: }
1448: return $filepath;
1449: }
1450:
1451: sub store_edited_file {
1452: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1453: my $file = $primary_url;
1454: $file =~ s#^/uploaded/$docudom/$docuname/##;
1455: my $fpath = '';
1456: my $fname = $file;
1457: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1458: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1459: my $filepath = &build_filepath($fpath);
1460: open(my $fh,'>'.$filepath.'/'.$fname);
1461: print $fh $content;
1462: close($fh);
1463: my $home=&homeserver($docuname,$docudom);
1464: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1465: $home);
1466: if ($$fetchresult eq 'ok') {
1467: return '/uploaded/'.$fpath.'/'.$fname;
1468: } else {
1469: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1470: ' to host '.$home.': '.$$fetchresult);
1471: return '/adm/notfound.html';
1472: }
1473: }
1474:
1475: sub clean_filename {
1476: my ($fname,$args)=@_;
1477: # Replace Windows backslashes by forward slashes
1478: $fname=~s/\\/\//g;
1479: if (!$args->{'keep_path'}) {
1480: # Get rid of everything but the actual filename
1481: $fname=~s/^.*\/([^\/]+)$/$1/;
1482: }
1483: # Replace spaces by underscores
1484: $fname=~s/\s+/\_/g;
1485: # Replace all other weird characters by nothing
1486: $fname=~s{[^/\w\.\-]}{}g;
1487: # Replace all .\d. sequences with _\d. so they no longer look like version
1488: # numbers
1489: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1490: return $fname;
1491: }
1492:
1493: # --------------- Take an uploaded file and put it into the userfiles directory
1494: # input: $formname - the contents of the file are in $env{"form.$formname"}
1495: # the desired filenam is in $env{"form.$formname.filename"}
1496: # $coursedoc - if true up to the current course
1497: # if false
1498: # $subdir - directory in userfile to store the file into
1499: # $parser, $allfiles, $codebase - unknown
1500: #
1501: # output: url of file in userspace, or error: <message>
1502: # or /adm/notfound.html if failure to upload occurse
1503:
1504:
1505: sub userfileupload {
1506: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,$destudom)=@_;
1507: if (!defined($subdir)) { $subdir='unknown'; }
1508: my $fname=$env{'form.'.$formname.'.filename'};
1509: $fname=&clean_filename($fname);
1510: # See if there is anything left
1511: unless ($fname) { return 'error: no uploaded file'; }
1512: chop($env{'form.'.$formname});
1513: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1514: my $now = time;
1515: my $filepath = 'tmp/helprequests/'.$now;
1516: my @parts=split(/\//,$filepath);
1517: my $fullpath = $perlvar{'lonDaemons'};
1518: for (my $i=0;$i<@parts;$i++) {
1519: $fullpath .= '/'.$parts[$i];
1520: if ((-e $fullpath)!=1) {
1521: mkdir($fullpath,0777);
1522: }
1523: }
1524: open(my $fh,'>'.$fullpath.'/'.$fname);
1525: print $fh $env{'form.'.$formname};
1526: close($fh);
1527: return $fullpath.'/'.$fname;
1528: } elsif (($formname eq 'coursecreatorxml') && ($subdir eq 'batchupload')) { #files uploaded to create course page are handled differently
1529: my $filepath = 'tmp/addcourse/'.$destudom.'/web/'.$env{'user.name'}.
1530: '_'.$env{'user.domain'}.'/pending';
1531: my @parts=split(/\//,$filepath);
1532: my $fullpath = $perlvar{'lonDaemons'};
1533: for (my $i=0;$i<@parts;$i++) {
1534: $fullpath .= '/'.$parts[$i];
1535: if ((-e $fullpath)!=1) {
1536: mkdir($fullpath,0777);
1537: }
1538: }
1539: open(my $fh,'>'.$fullpath.'/'.$fname);
1540: print $fh $env{'form.'.$formname};
1541: close($fh);
1542: return $fullpath.'/'.$fname;
1543: }
1544:
1545: # Create the directory if not present
1546: $fname="$subdir/$fname";
1547: if ($coursedoc) {
1548: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1549: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1550: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1551: return &finishuserfileupload($docuname,$docudom,
1552: $formname,$fname,$parser,$allfiles,
1553: $codebase);
1554: } else {
1555: $fname=$env{'form.folder'}.'/'.$fname;
1556: return &process_coursefile('uploaddoc',$docuname,$docudom,
1557: $fname,$formname,$parser,
1558: $allfiles,$codebase);
1559: }
1560: } elsif (defined($destuname)) {
1561: my $docuname=$destuname;
1562: my $docudom=$destudom;
1563: return &finishuserfileupload($docuname,$docudom,$formname,
1564: $fname,$parser,$allfiles,$codebase);
1565:
1566: } else {
1567: my $docuname=$env{'user.name'};
1568: my $docudom=$env{'user.domain'};
1569: if (exists($env{'form.group'})) {
1570: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1571: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1572: }
1573: return &finishuserfileupload($docuname,$docudom,$formname,
1574: $fname,$parser,$allfiles,$codebase);
1575: }
1576: }
1577:
1578: sub finishuserfileupload {
1579: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
1580: my $path=$docudom.'/'.$docuname.'/';
1581: my $filepath=$perlvar{'lonDocRoot'};
1582: my ($fnamepath,$file);
1583: $file=$fname;
1584: if ($fname=~m|/|) {
1585: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1586: $path.=$fnamepath.'/';
1587: }
1588: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1589: my $count;
1590: for ($count=4;$count<=$#parts;$count++) {
1591: $filepath.="/$parts[$count]";
1592: if ((-e $filepath)!=1) {
1593: mkdir($filepath,0777);
1594: }
1595: }
1596: # Save the file
1597: {
1598: if (!open(FH,'>'.$filepath.'/'.$file)) {
1599: &logthis('Failed to create '.$filepath.'/'.$file);
1600: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1601: return '/adm/notfound.html';
1602: }
1603: if (!print FH ($env{'form.'.$formname})) {
1604: &logthis('Failed to write to '.$filepath.'/'.$file);
1605: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1606: return '/adm/notfound.html';
1607: }
1608: close(FH);
1609: }
1610: if ($parser eq 'parse') {
1611: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1612: $codebase);
1613: unless ($parse_result eq 'ok') {
1614: &logthis('Failed to parse '.$filepath.$file.
1615: ' for embedded media: '.$parse_result);
1616: }
1617: }
1618: # Notify homeserver to grep it
1619: #
1620: my $docuhome=&homeserver($docuname,$docudom);
1621: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1622: if ($fetchresult eq 'ok') {
1623: #
1624: # Return the URL to it
1625: return '/uploaded/'.$path.$file;
1626: } else {
1627: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1628: ': '.$fetchresult);
1629: return '/adm/notfound.html';
1630: }
1631: }
1632:
1633: sub extract_embedded_items {
1634: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1635: my @state = ();
1636: my %javafiles = (
1637: codebase => '',
1638: code => '',
1639: archive => ''
1640: );
1641: my %mediafiles = (
1642: src => '',
1643: movie => '',
1644: );
1645: my $p;
1646: if ($content) {
1647: $p = HTML::LCParser->new($content);
1648: } else {
1649: $p = HTML::LCParser->new($filepath.'/'.$file);
1650: }
1651: while (my $t=$p->get_token()) {
1652: if ($t->[0] eq 'S') {
1653: my ($tagname, $attr) = ($t->[1],$t->[2]);
1654: push (@state, $tagname);
1655: if (lc($tagname) eq 'allow') {
1656: &add_filetype($allfiles,$attr->{'src'},'src');
1657: }
1658: if (lc($tagname) eq 'img') {
1659: &add_filetype($allfiles,$attr->{'src'},'src');
1660: }
1661: if (lc($tagname) eq 'script') {
1662: if ($attr->{'archive'} =~ /\.jar$/i) {
1663: &add_filetype($allfiles,$attr->{'archive'},'archive');
1664: } else {
1665: &add_filetype($allfiles,$attr->{'src'},'src');
1666: }
1667: }
1668: if (lc($tagname) eq 'link') {
1669: if (lc($attr->{'rel'}) eq 'stylesheet') {
1670: &add_filetype($allfiles,$attr->{'href'},'href');
1671: }
1672: }
1673: if (lc($tagname) eq 'object' ||
1674: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1675: foreach my $item (keys(%javafiles)) {
1676: $javafiles{$item} = '';
1677: }
1678: }
1679: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1680: my $name = lc($attr->{'name'});
1681: foreach my $item (keys(%javafiles)) {
1682: if ($name eq $item) {
1683: $javafiles{$item} = $attr->{'value'};
1684: last;
1685: }
1686: }
1687: foreach my $item (keys(%mediafiles)) {
1688: if ($name eq $item) {
1689: &add_filetype($allfiles, $attr->{'value'}, 'value');
1690: last;
1691: }
1692: }
1693: }
1694: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1695: foreach my $item (keys(%javafiles)) {
1696: if ($attr->{$item}) {
1697: $javafiles{$item} = $attr->{$item};
1698: last;
1699: }
1700: }
1701: foreach my $item (keys(%mediafiles)) {
1702: if ($attr->{$item}) {
1703: &add_filetype($allfiles,$attr->{$item},$item);
1704: last;
1705: }
1706: }
1707: }
1708: } elsif ($t->[0] eq 'E') {
1709: my ($tagname) = ($t->[1]);
1710: if ($javafiles{'codebase'} ne '') {
1711: $javafiles{'codebase'} .= '/';
1712: }
1713: if (lc($tagname) eq 'applet' ||
1714: lc($tagname) eq 'object' ||
1715: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1716: ) {
1717: foreach my $item (keys(%javafiles)) {
1718: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1719: my $file=$javafiles{'codebase'}.$javafiles{$item};
1720: &add_filetype($allfiles,$file,$item);
1721: }
1722: }
1723: }
1724: pop @state;
1725: }
1726: }
1727: return 'ok';
1728: }
1729:
1730: sub add_filetype {
1731: my ($allfiles,$file,$type)=@_;
1732: if (exists($allfiles->{$file})) {
1733: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1734: push(@{$allfiles->{$file}}, &escape($type));
1735: }
1736: } else {
1737: @{$allfiles->{$file}} = (&escape($type));
1738: }
1739: }
1740:
1741: sub removeuploadedurl {
1742: my ($url)=@_;
1743: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1744: return &removeuserfile($uname,$udom,$fname);
1745: }
1746:
1747: sub removeuserfile {
1748: my ($docuname,$docudom,$fname)=@_;
1749: my $home=&homeserver($docuname,$docudom);
1750: my $result = &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1751: if ($result eq 'ok') {
1752: if (($fname !~ /\.meta$/) && (&is_portfolio_file($fname))) {
1753: my $metafile = $fname.'.meta';
1754: my $metaresult = &removeuserfile($docuname,$docudom,$metafile);
1755: my $url = "/uploaded/$docudom/$docuname/$fname";
1756: my ($file,$group) = (&parse_portfolio_url($url))[3,4];
1757: my $sqlresult =
1758: &update_portfolio_table($docuname,$docudom,$file,
1759: 'portfolio_metadata',$group,
1760: 'delete');
1761: }
1762: }
1763: return $result;
1764: }
1765:
1766: sub mkdiruserfile {
1767: my ($docuname,$docudom,$dir)=@_;
1768: my $home=&homeserver($docuname,$docudom);
1769: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1770: }
1771:
1772: sub renameuserfile {
1773: my ($docuname,$docudom,$old,$new)=@_;
1774: my $home=&homeserver($docuname,$docudom);
1775: my $result = &reply("renameuserfile:$docudom:$docuname:".
1776: &escape("$old").':'.&escape("$new"),$home);
1777: if ($result eq 'ok') {
1778: if (($old !~ /\.meta$/) && (&is_portfolio_file($old))) {
1779: my $oldmeta = $old.'.meta';
1780: my $newmeta = $new.'.meta';
1781: my $metaresult =
1782: &renameuserfile($docuname,$docudom,$oldmeta,$newmeta);
1783: my $url = "/uploaded/$docudom/$docuname/$old";
1784: my ($file,$group) = (&parse_portfolio_url($url))[3,4];
1785: my $sqlresult =
1786: &update_portfolio_table($docuname,$docudom,$file,
1787: 'portfolio_metadata',$group,
1788: 'delete');
1789: }
1790: }
1791: return $result;
1792: }
1793:
1794: # ------------------------------------------------------------------------- Log
1795:
1796: sub log {
1797: my ($dom,$nam,$hom,$what)=@_;
1798: return critical("log:$dom:$nam:$what",$hom);
1799: }
1800:
1801: # ------------------------------------------------------------------ Course Log
1802: #
1803: # This routine flushes several buffers of non-mission-critical nature
1804: #
1805:
1806: sub flushcourselogs {
1807: &logthis('Flushing log buffers');
1808: #
1809: # course logs
1810: # This is a log of all transactions in a course, which can be used
1811: # for data mining purposes
1812: #
1813: # It also collects the courseid database, which lists last transaction
1814: # times and course titles for all courseids
1815: #
1816: my %courseidbuffer=();
1817: foreach my $crsid (keys %courselogs) {
1818: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1819: &escape($courselogs{$crsid}),
1820: $coursehombuf{$crsid}) eq 'ok') {
1821: delete $courselogs{$crsid};
1822: } else {
1823: &logthis('Failed to flush log buffer for '.$crsid);
1824: if (length($courselogs{$crsid})>40000) {
1825: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
1826: " exceeded maximum size, deleting.</font>");
1827: delete $courselogs{$crsid};
1828: }
1829: }
1830: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1831: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1832: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1833: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1834: } else {
1835: $courseidbuffer{$coursehombuf{$crsid}}=
1836: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1837: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1838: }
1839: }
1840: #
1841: # Write course id database (reverse lookup) to homeserver of courses
1842: # Is used in pickcourse
1843: #
1844: foreach my $crs_home (keys(%courseidbuffer)) {
1845: &courseidput($hostdom{$crs_home},$courseidbuffer{$crs_home},
1846: $crs_home);
1847: }
1848: #
1849: # File accesses
1850: # Writes to the dynamic metadata of resources to get hit counts, etc.
1851: #
1852: foreach my $entry (keys(%accesshash)) {
1853: if ($entry =~ /___count$/) {
1854: my ($dom,$name);
1855: ($dom,$name,undef)=
1856: ($entry=~m{___($match_domain)/($match_name)/(.*)___count$});
1857: if (! defined($dom) || $dom eq '' ||
1858: ! defined($name) || $name eq '') {
1859: my $cid = $env{'request.course.id'};
1860: $dom = $env{'request.'.$cid.'.domain'};
1861: $name = $env{'request.'.$cid.'.num'};
1862: }
1863: my $value = $accesshash{$entry};
1864: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1865: my %temphash=($url => $value);
1866: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1867: if ($result eq 'ok') {
1868: delete $accesshash{$entry};
1869: } elsif ($result eq 'unknown_cmd') {
1870: # Target server has old code running on it.
1871: my %temphash=($entry => $value);
1872: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1873: delete $accesshash{$entry};
1874: }
1875: }
1876: } else {
1877: my ($dom,$name) = ($entry=~m{___($match_domain)/($match_name)/(.*)___(\w+)$});
1878: my %temphash=($entry => $accesshash{$entry});
1879: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1880: delete $accesshash{$entry};
1881: }
1882: }
1883: }
1884: #
1885: # Roles
1886: # Reverse lookup of user roles for course faculty/staff and co-authorship
1887: #
1888: foreach my $entry (keys(%userrolehash)) {
1889: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1890: split(/\:/,$entry);
1891: if (&Apache::lonnet::put('nohist_userroles',
1892: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1893: $rudom,$runame) eq 'ok') {
1894: delete $userrolehash{$entry};
1895: }
1896: }
1897: #
1898: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1899: #
1900: my %domrolebuffer = ();
1901: foreach my $entry (keys %domainrolehash) {
1902: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1903: if ($domrolebuffer{$rudom}) {
1904: $domrolebuffer{$rudom}.='&'.&escape($entry).
1905: '='.&escape($domainrolehash{$entry});
1906: } else {
1907: $domrolebuffer{$rudom}.=&escape($entry).
1908: '='.&escape($domainrolehash{$entry});
1909: }
1910: delete $domainrolehash{$entry};
1911: }
1912: foreach my $dom (keys(%domrolebuffer)) {
1913: my %servers = &get_servers($dom,'library');
1914: foreach my $tryserver (keys(%servers)) {
1915: unless (&reply('domroleput:'.$dom.':'.
1916: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1917: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1918: }
1919: }
1920: }
1921: $dumpcount++;
1922: }
1923:
1924: sub courselog {
1925: my $what=shift;
1926: $what=time.':'.$what;
1927: unless ($env{'request.course.id'}) { return ''; }
1928: $coursedombuf{$env{'request.course.id'}}=
1929: $env{'course.'.$env{'request.course.id'}.'.domain'};
1930: $coursenumbuf{$env{'request.course.id'}}=
1931: $env{'course.'.$env{'request.course.id'}.'.num'};
1932: $coursehombuf{$env{'request.course.id'}}=
1933: $env{'course.'.$env{'request.course.id'}.'.home'};
1934: $coursedescrbuf{$env{'request.course.id'}}=
1935: $env{'course.'.$env{'request.course.id'}.'.description'};
1936: $courseinstcodebuf{$env{'request.course.id'}}=
1937: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1938: $courseownerbuf{$env{'request.course.id'}}=
1939: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1940: $coursetypebuf{$env{'request.course.id'}}=
1941: $env{'course.'.$env{'request.course.id'}.'.type'};
1942: if (defined $courselogs{$env{'request.course.id'}}) {
1943: $courselogs{$env{'request.course.id'}}.='&'.$what;
1944: } else {
1945: $courselogs{$env{'request.course.id'}}.=$what;
1946: }
1947: if (length($courselogs{$env{'request.course.id'}})>4048) {
1948: &flushcourselogs();
1949: }
1950: }
1951:
1952: sub courseacclog {
1953: my $fnsymb=shift;
1954: unless ($env{'request.course.id'}) { return ''; }
1955: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1956: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1957: $what.=':POST';
1958: # FIXME: Probably ought to escape things....
1959: foreach my $key (keys(%env)) {
1960: if ($key=~/^form\.(.*)/) {
1961: $what.=':'.$1.'='.$env{$key};
1962: }
1963: }
1964: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1965: # FIXME: We should not be depending on a form parameter that someone
1966: # editing lonsearchcat.pm might change in the future.
1967: if ($env{'form.phase'} eq 'course_search') {
1968: $what.= ':POST';
1969: # FIXME: Probably ought to escape things....
1970: foreach my $element ('courseexp','crsfulltext','crsrelated',
1971: 'crsdiscuss') {
1972: $what.=':'.$element.'='.$env{'form.'.$element};
1973: }
1974: }
1975: }
1976: &courselog($what);
1977: }
1978:
1979: sub countacc {
1980: my $url=&declutter(shift);
1981: return if (! defined($url) || $url eq '');
1982: unless ($env{'request.course.id'}) { return ''; }
1983: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1984: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1985: $accesshash{$key}++;
1986: }
1987:
1988: sub linklog {
1989: my ($from,$to)=@_;
1990: $from=&declutter($from);
1991: $to=&declutter($to);
1992: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1993: $accesshash{$to.'___'.$from.'___goto'}=1;
1994: }
1995:
1996: sub userrolelog {
1997: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1998: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
1999: ($trole=~/^in/) || ($trole=~/^cc/) ||
2000: ($trole=~/^ep/) || ($trole=~/^cr/) ||
2001: ($trole=~/^ta/)) {
2002: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
2003: $userrolehash
2004: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
2005: =$tend.':'.$tstart;
2006: }
2007: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
2008: ($trole=~/^li/) || ($trole=~/^li/) ||
2009: ($trole=~/^au/) || ($trole=~/^dg/) ||
2010: ($trole=~/^sc/)) {
2011: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
2012: $domainrolehash
2013: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
2014: = $tend.':'.$tstart;
2015: }
2016: }
2017:
2018: sub get_course_adv_roles {
2019: my $cid=shift;
2020: $cid=$env{'request.course.id'} unless (defined($cid));
2021: my %coursehash=&coursedescription($cid);
2022: my %nothide=();
2023: foreach my $user (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
2024: $nothide{join(':',split(/[\@\:]/,$user))}=1;
2025: }
2026: my %returnhash=();
2027: my %dumphash=
2028: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
2029: my $now=time;
2030: foreach my $entry (keys %dumphash) {
2031: my ($tend,$tstart)=split(/\:/,$dumphash{$entry});
2032: if (($tstart) && ($tstart<0)) { next; }
2033: if (($tend) && ($tend<$now)) { next; }
2034: if (($tstart) && ($now<$tstart)) { next; }
2035: my ($role,$username,$domain,$section)=split(/\:/,$entry);
2036: if ($username eq '' || $domain eq '') { next; }
2037: if ((&privileged($username,$domain)) &&
2038: (!$nothide{$username.':'.$domain})) { next; }
2039: if ($role eq 'cr') { next; }
2040: my $key=&plaintext($role);
2041: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
2042: if ($returnhash{$key}) {
2043: $returnhash{$key}.=','.$username.':'.$domain;
2044: } else {
2045: $returnhash{$key}=$username.':'.$domain;
2046: }
2047: }
2048: return %returnhash;
2049: }
2050:
2051: sub get_my_roles {
2052: my ($uname,$udom,$types,$roles,$roledoms)=@_;
2053: unless (defined($uname)) { $uname=$env{'user.name'}; }
2054: unless (defined($udom)) { $udom=$env{'user.domain'}; }
2055: my %dumphash=
2056: &dump('nohist_userroles',$udom,$uname);
2057: my %returnhash=();
2058: my $now=time;
2059: foreach my $entry (keys(%dumphash)) {
2060: my ($tend,$tstart)=split(/\:/,$dumphash{$entry});
2061: if (($tstart) && ($tstart<0)) { next; }
2062: my $status = 'active';
2063: if (($tend) && ($tend<$now)) {
2064: $status = 'previous';
2065: }
2066: if (($tstart) && ($now<$tstart)) {
2067: $status = 'future';
2068: }
2069: if (ref($types) eq 'ARRAY') {
2070: if (!grep(/^\Q$status\E$/,@{$types})) {
2071: next;
2072: }
2073: } else {
2074: if ($status ne 'active') {
2075: next;
2076: }
2077: }
2078: my ($role,$username,$domain,$section)=split(/\:/,$entry);
2079: if (ref($roledoms) eq 'ARRAY') {
2080: if (!grep(/^\Q$domain\E$/,@{$roledoms})) {
2081: next;
2082: }
2083: }
2084: if (ref($roles) eq 'ARRAY') {
2085: if (!grep(/^\Q$role\E$/,@{$roles})) {
2086: next;
2087: }
2088: }
2089: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
2090: }
2091: return %returnhash;
2092: }
2093:
2094: # ----------------------------------------------------- Frontpage Announcements
2095: #
2096: #
2097:
2098: sub postannounce {
2099: my ($server,$text)=@_;
2100: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
2101: unless ($text=~/\w/) { $text=''; }
2102: return &reply('setannounce:'.&escape($text),$server);
2103: }
2104:
2105: sub getannounce {
2106:
2107: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
2108: my $announcement='';
2109: while (my $line = <$fh>) { $announcement .= $line; }
2110: close($fh);
2111: if ($announcement=~/\w/) {
2112: return
2113: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
2114: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
2115: } else {
2116: return '';
2117: }
2118: } else {
2119: return '';
2120: }
2121: }
2122:
2123: # ---------------------------------------------------------- Course ID routines
2124: # Deal with domain's nohist_courseid.db files
2125: #
2126:
2127: sub courseidput {
2128: my ($domain,$what,$coursehome)=@_;
2129: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
2130: }
2131:
2132: sub courseiddump {
2133: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref,$typefilter,$regexp_ok)=@_;
2134: my %returnhash=();
2135: unless ($domfilter) { $domfilter=''; }
2136: foreach my $tryserver (keys %libserv) {
2137: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
2138: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
2139: foreach my $line (
2140: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
2141: $sincefilter.':'.&escape($descfilter).':'.
2142: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter).':'.&escape($typefilter).':'.&escape($regexp_ok),
2143: $tryserver))) {
2144: my ($key,$value)=split(/\=/,$line,2);
2145: if (($key) && ($value)) {
2146: $returnhash{&unescape($key)}=$value;
2147: }
2148: }
2149: }
2150: }
2151: }
2152: return %returnhash;
2153: }
2154:
2155: # ---------------------------------------------------------- DC e-mail
2156:
2157: sub dcmailput {
2158: my ($domain,$msgid,$message,$server)=@_;
2159: my $status = &Apache::lonnet::critical(
2160: 'dcmailput:'.$domain.':'.&escape($msgid).'='.
2161: &escape($message),$server);
2162: return $status;
2163: }
2164:
2165: sub dcmaildump {
2166: my ($dom,$startdate,$enddate,$senders) = @_;
2167: my %returnhash=();
2168: if (exists($domain_primary{$dom})) {
2169: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
2170: &escape($enddate).':';
2171: my @esc_senders=map { &escape($_)} @$senders;
2172: $cmd.=&escape(join('&',@esc_senders));
2173: foreach my $line (split(/\&/,&reply($cmd,$domain_primary{$dom}))) {
2174: my ($key,$value) = split(/\=/,$line,2);
2175: if (($key) && ($value)) {
2176: $returnhash{&unescape($key)} = &unescape($value);
2177: }
2178: }
2179: }
2180: return %returnhash;
2181: }
2182: # ---------------------------------------------------------- Domain roles
2183:
2184: sub get_domain_roles {
2185: my ($dom,$roles,$startdate,$enddate)=@_;
2186: if (undef($startdate) || $startdate eq '') {
2187: $startdate = '.';
2188: }
2189: if (undef($enddate) || $enddate eq '') {
2190: $enddate = '.';
2191: }
2192: my $rolelist = join(':',@{$roles});
2193: my %personnel = ();
2194:
2195: my %servers = &get_servers($dom,'library');
2196: foreach my $tryserver (keys(%servers)) {
2197: %{$personnel{$tryserver}}=();
2198: foreach my $line (split(/\&/,&reply('domrolesdump:'.$dom.':'.
2199: &escape($startdate).':'.
2200: &escape($enddate).':'.
2201: &escape($rolelist), $tryserver))) {
2202: my ($key,$value) = split(/\=/,$line,2);
2203: if (($key) && ($value)) {
2204: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
2205: }
2206: }
2207: }
2208: return %personnel;
2209: }
2210:
2211: # ----------------------------------------------------------- Check out an item
2212:
2213: sub get_first_access {
2214: my ($type,$argsymb)=@_;
2215: my ($symb,$courseid,$udom,$uname)=&whichuser();
2216: if ($argsymb) { $symb=$argsymb; }
2217: my ($map,$id,$res)=&decode_symb($symb);
2218: if ($type eq 'map') {
2219: $res=&symbread($map);
2220: } else {
2221: $res=$symb;
2222: }
2223: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
2224: return $times{"$courseid\0$res"};
2225: }
2226:
2227: sub set_first_access {
2228: my ($type)=@_;
2229: my ($symb,$courseid,$udom,$uname)=&whichuser();
2230: my ($map,$id,$res)=&decode_symb($symb);
2231: if ($type eq 'map') {
2232: $res=&symbread($map);
2233: } else {
2234: $res=$symb;
2235: }
2236: my $firstaccess=&get_first_access($type,$symb);
2237: if (!$firstaccess) {
2238: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
2239: }
2240: return 'already_set';
2241: }
2242:
2243: sub checkout {
2244: my ($symb,$tuname,$tudom,$tcrsid)=@_;
2245: my $now=time;
2246: my $lonhost=$perlvar{'lonHostID'};
2247: my $infostr=&escape(
2248: 'CHECKOUTTOKEN&'.
2249: $tuname.'&'.
2250: $tudom.'&'.
2251: $tcrsid.'&'.
2252: $symb.'&'.
2253: $now.'&'.$ENV{'REMOTE_ADDR'});
2254: my $token=&reply('tmpput:'.$infostr,$lonhost);
2255: if ($token=~/^error\:/) {
2256: &logthis("<font color=\"blue\">WARNING: ".
2257: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
2258: "</font>");
2259: return '';
2260: }
2261:
2262: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
2263: $token=~tr/a-z/A-Z/;
2264:
2265: my %infohash=('resource.0.outtoken' => $token,
2266: 'resource.0.checkouttime' => $now,
2267: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
2268:
2269: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2270: return '';
2271: } else {
2272: &logthis("<font color=\"blue\">WARNING: ".
2273: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
2274: "</font>");
2275: }
2276:
2277: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2278: &escape('Checkout '.$infostr.' - '.
2279: $token)) ne 'ok') {
2280: return '';
2281: } else {
2282: &logthis("<font color=\"blue\">WARNING: ".
2283: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
2284: "</font>");
2285: }
2286: return $token;
2287: }
2288:
2289: # ------------------------------------------------------------ Check in an item
2290:
2291: sub checkin {
2292: my $token=shift;
2293: my $now=time;
2294: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2295: $lonhost=~tr/A-Z/a-z/;
2296: my $dtoken=$ta.'_'.&hostname($lonhost).'_'.$tb;
2297: $dtoken=~s/\W/\_/g;
2298: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2299: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2300:
2301: unless (($tuname) && ($tudom)) {
2302: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2303: return '';
2304: }
2305:
2306: unless (&allowed('mgr',$tcrsid)) {
2307: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2308: $env{'user.name'}.' - '.$env{'user.domain'});
2309: return '';
2310: }
2311:
2312: my %infohash=('resource.0.intoken' => $token,
2313: 'resource.0.checkintime' => $now,
2314: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2315:
2316: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2317: return '';
2318: }
2319:
2320: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2321: &escape('Checkin - '.$token)) ne 'ok') {
2322: return '';
2323: }
2324:
2325: return ($symb,$tuname,$tudom,$tcrsid);
2326: }
2327:
2328: # --------------------------------------------- Set Expire Date for Spreadsheet
2329:
2330: sub expirespread {
2331: my ($uname,$udom,$stype,$usymb)=@_;
2332: my $cid=$env{'request.course.id'};
2333: if ($cid) {
2334: my $now=time;
2335: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2336: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2337: $env{'course.'.$cid.'.num'}.
2338: ':nohist_expirationdates:'.
2339: &escape($key).'='.$now,
2340: $env{'course.'.$cid.'.home'})
2341: }
2342: return 'ok';
2343: }
2344:
2345: # ----------------------------------------------------- Devalidate Spreadsheets
2346:
2347: sub devalidate {
2348: my ($symb,$uname,$udom)=@_;
2349: my $cid=$env{'request.course.id'};
2350: if ($cid) {
2351: # delete the stored spreadsheets for
2352: # - the student level sheet of this user in course's homespace
2353: # - the assessment level sheet for this resource
2354: # for this user in user's homespace
2355: # - current conditional state info
2356: my $key=$uname.':'.$udom.':';
2357: my $status=
2358: &del('nohist_calculatedsheets',
2359: [$key.'studentcalc:'],
2360: $env{'course.'.$cid.'.domain'},
2361: $env{'course.'.$cid.'.num'})
2362: .' '.
2363: &del('nohist_calculatedsheets_'.$cid,
2364: [$key.'assesscalc:'.$symb],$udom,$uname);
2365: unless ($status eq 'ok ok') {
2366: &logthis('Could not devalidate spreadsheet '.
2367: $uname.' at '.$udom.' for '.
2368: $symb.': '.$status);
2369: }
2370: &delenv('user.state.'.$cid);
2371: }
2372: }
2373:
2374: sub get_scalar {
2375: my ($string,$end) = @_;
2376: my $value;
2377: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2378: $value = $1;
2379: } elsif ($$string =~ s/^([^&]*?)&//) {
2380: $value = $1;
2381: }
2382: return &unescape($value);
2383: }
2384:
2385: sub array2str {
2386: my (@array) = @_;
2387: my $result=&arrayref2str(\@array);
2388: $result=~s/^__ARRAY_REF__//;
2389: $result=~s/__END_ARRAY_REF__$//;
2390: return $result;
2391: }
2392:
2393: sub arrayref2str {
2394: my ($arrayref) = @_;
2395: my $result='__ARRAY_REF__';
2396: foreach my $elem (@$arrayref) {
2397: if(ref($elem) eq 'ARRAY') {
2398: $result.=&arrayref2str($elem).'&';
2399: } elsif(ref($elem) eq 'HASH') {
2400: $result.=&hashref2str($elem).'&';
2401: } elsif(ref($elem)) {
2402: #print("Got a ref of ".(ref($elem))." skipping.");
2403: } else {
2404: $result.=&escape($elem).'&';
2405: }
2406: }
2407: $result=~s/\&$//;
2408: $result .= '__END_ARRAY_REF__';
2409: return $result;
2410: }
2411:
2412: sub hash2str {
2413: my (%hash) = @_;
2414: my $result=&hashref2str(\%hash);
2415: $result=~s/^__HASH_REF__//;
2416: $result=~s/__END_HASH_REF__$//;
2417: return $result;
2418: }
2419:
2420: sub hashref2str {
2421: my ($hashref)=@_;
2422: my $result='__HASH_REF__';
2423: foreach my $key (sort(keys(%$hashref))) {
2424: if (ref($key) eq 'ARRAY') {
2425: $result.=&arrayref2str($key).'=';
2426: } elsif (ref($key) eq 'HASH') {
2427: $result.=&hashref2str($key).'=';
2428: } elsif (ref($key)) {
2429: $result.='=';
2430: #print("Got a ref of ".(ref($key))." skipping.");
2431: } else {
2432: if ($key) {$result.=&escape($key).'=';} else { last; }
2433: }
2434:
2435: if(ref($hashref->{$key}) eq 'ARRAY') {
2436: $result.=&arrayref2str($hashref->{$key}).'&';
2437: } elsif(ref($hashref->{$key}) eq 'HASH') {
2438: $result.=&hashref2str($hashref->{$key}).'&';
2439: } elsif(ref($hashref->{$key})) {
2440: $result.='&';
2441: #print("Got a ref of ".(ref($hashref->{$key}))." skipping.");
2442: } else {
2443: $result.=&escape($hashref->{$key}).'&';
2444: }
2445: }
2446: $result=~s/\&$//;
2447: $result .= '__END_HASH_REF__';
2448: return $result;
2449: }
2450:
2451: sub str2hash {
2452: my ($string)=@_;
2453: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2454: return %$hash;
2455: }
2456:
2457: sub str2hashref {
2458: my ($string) = @_;
2459:
2460: my %hash;
2461:
2462: if($string !~ /^__HASH_REF__/) {
2463: if (! ($string eq '' || !defined($string))) {
2464: $hash{'error'}='Not hash reference';
2465: }
2466: return (\%hash, $string);
2467: }
2468:
2469: $string =~ s/^__HASH_REF__//;
2470:
2471: while($string !~ /^__END_HASH_REF__/) {
2472: #key
2473: my $key='';
2474: if($string =~ /^__HASH_REF__/) {
2475: ($key, $string)=&str2hashref($string);
2476: if(defined($key->{'error'})) {
2477: $hash{'error'}='Bad data';
2478: return (\%hash, $string);
2479: }
2480: } elsif($string =~ /^__ARRAY_REF__/) {
2481: ($key, $string)=&str2arrayref($string);
2482: if($key->[0] eq 'Array reference error') {
2483: $hash{'error'}='Bad data';
2484: return (\%hash, $string);
2485: }
2486: } else {
2487: $string =~ s/^(.*?)=//;
2488: $key=&unescape($1);
2489: }
2490: $string =~ s/^=//;
2491:
2492: #value
2493: my $value='';
2494: if($string =~ /^__HASH_REF__/) {
2495: ($value, $string)=&str2hashref($string);
2496: if(defined($value->{'error'})) {
2497: $hash{'error'}='Bad data';
2498: return (\%hash, $string);
2499: }
2500: } elsif($string =~ /^__ARRAY_REF__/) {
2501: ($value, $string)=&str2arrayref($string);
2502: if($value->[0] eq 'Array reference error') {
2503: $hash{'error'}='Bad data';
2504: return (\%hash, $string);
2505: }
2506: } else {
2507: $value=&get_scalar(\$string,'__END_HASH_REF__');
2508: }
2509: $string =~ s/^&//;
2510:
2511: $hash{$key}=$value;
2512: }
2513:
2514: $string =~ s/^__END_HASH_REF__//;
2515:
2516: return (\%hash, $string);
2517: }
2518:
2519: sub str2array {
2520: my ($string)=@_;
2521: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2522: return @$array;
2523: }
2524:
2525: sub str2arrayref {
2526: my ($string) = @_;
2527: my @array;
2528:
2529: if($string !~ /^__ARRAY_REF__/) {
2530: if (! ($string eq '' || !defined($string))) {
2531: $array[0]='Array reference error';
2532: }
2533: return (\@array, $string);
2534: }
2535:
2536: $string =~ s/^__ARRAY_REF__//;
2537:
2538: while($string !~ /^__END_ARRAY_REF__/) {
2539: my $value='';
2540: if($string =~ /^__HASH_REF__/) {
2541: ($value, $string)=&str2hashref($string);
2542: if(defined($value->{'error'})) {
2543: $array[0] ='Array reference error';
2544: return (\@array, $string);
2545: }
2546: } elsif($string =~ /^__ARRAY_REF__/) {
2547: ($value, $string)=&str2arrayref($string);
2548: if($value->[0] eq 'Array reference error') {
2549: $array[0] ='Array reference error';
2550: return (\@array, $string);
2551: }
2552: } else {
2553: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2554: }
2555: $string =~ s/^&//;
2556:
2557: push(@array, $value);
2558: }
2559:
2560: $string =~ s/^__END_ARRAY_REF__//;
2561:
2562: return (\@array, $string);
2563: }
2564:
2565: # -------------------------------------------------------------------Temp Store
2566:
2567: sub tmpreset {
2568: my ($symb,$namespace,$domain,$stuname) = @_;
2569: if (!$symb) {
2570: $symb=&symbread();
2571: if (!$symb) { $symb= $env{'request.url'}; }
2572: }
2573: $symb=escape($symb);
2574:
2575: if (!$namespace) { $namespace=$env{'request.state'}; }
2576: $namespace=~s/\//\_/g;
2577: $namespace=~s/\W//g;
2578:
2579: if (!$domain) { $domain=$env{'user.domain'}; }
2580: if (!$stuname) { $stuname=$env{'user.name'}; }
2581: if ($domain eq 'public' && $stuname eq 'public') {
2582: $stuname=$ENV{'REMOTE_ADDR'};
2583: }
2584: my $path=$perlvar{'lonDaemons'}.'/tmp';
2585: my %hash;
2586: if (tie(%hash,'GDBM_File',
2587: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2588: &GDBM_WRCREAT(),0640)) {
2589: foreach my $key (keys %hash) {
2590: if ($key=~ /:$symb/) {
2591: delete($hash{$key});
2592: }
2593: }
2594: }
2595: }
2596:
2597: sub tmpstore {
2598: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2599:
2600: if (!$symb) {
2601: $symb=&symbread();
2602: if (!$symb) { $symb= $env{'request.url'}; }
2603: }
2604: $symb=escape($symb);
2605:
2606: if (!$namespace) {
2607: # I don't think we would ever want to store this for a course.
2608: # it seems this will only be used if we don't have a course.
2609: #$namespace=$env{'request.course.id'};
2610: #if (!$namespace) {
2611: $namespace=$env{'request.state'};
2612: #}
2613: }
2614: $namespace=~s/\//\_/g;
2615: $namespace=~s/\W//g;
2616: if (!$domain) { $domain=$env{'user.domain'}; }
2617: if (!$stuname) { $stuname=$env{'user.name'}; }
2618: if ($domain eq 'public' && $stuname eq 'public') {
2619: $stuname=$ENV{'REMOTE_ADDR'};
2620: }
2621: my $now=time;
2622: my %hash;
2623: my $path=$perlvar{'lonDaemons'}.'/tmp';
2624: if (tie(%hash,'GDBM_File',
2625: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2626: &GDBM_WRCREAT(),0640)) {
2627: $hash{"version:$symb"}++;
2628: my $version=$hash{"version:$symb"};
2629: my $allkeys='';
2630: foreach my $key (keys(%$storehash)) {
2631: $allkeys.=$key.':';
2632: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2633: }
2634: $hash{"$version:$symb:timestamp"}=$now;
2635: $allkeys.='timestamp';
2636: $hash{"$version:keys:$symb"}=$allkeys;
2637: if (untie(%hash)) {
2638: return 'ok';
2639: } else {
2640: return "error:$!";
2641: }
2642: } else {
2643: return "error:$!";
2644: }
2645: }
2646:
2647: # -----------------------------------------------------------------Temp Restore
2648:
2649: sub tmprestore {
2650: my ($symb,$namespace,$domain,$stuname) = @_;
2651:
2652: if (!$symb) {
2653: $symb=&symbread();
2654: if (!$symb) { $symb= $env{'request.url'}; }
2655: }
2656: $symb=escape($symb);
2657:
2658: if (!$namespace) { $namespace=$env{'request.state'}; }
2659:
2660: if (!$domain) { $domain=$env{'user.domain'}; }
2661: if (!$stuname) { $stuname=$env{'user.name'}; }
2662: if ($domain eq 'public' && $stuname eq 'public') {
2663: $stuname=$ENV{'REMOTE_ADDR'};
2664: }
2665: my %returnhash;
2666: $namespace=~s/\//\_/g;
2667: $namespace=~s/\W//g;
2668: my %hash;
2669: my $path=$perlvar{'lonDaemons'}.'/tmp';
2670: if (tie(%hash,'GDBM_File',
2671: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2672: &GDBM_READER(),0640)) {
2673: my $version=$hash{"version:$symb"};
2674: $returnhash{'version'}=$version;
2675: my $scope;
2676: for ($scope=1;$scope<=$version;$scope++) {
2677: my $vkeys=$hash{"$scope:keys:$symb"};
2678: my @keys=split(/:/,$vkeys);
2679: my $key;
2680: $returnhash{"$scope:keys"}=$vkeys;
2681: foreach $key (@keys) {
2682: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2683: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2684: }
2685: }
2686: if (!(untie(%hash))) {
2687: return "error:$!";
2688: }
2689: } else {
2690: return "error:$!";
2691: }
2692: return %returnhash;
2693: }
2694:
2695: # ----------------------------------------------------------------------- Store
2696:
2697: sub store {
2698: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2699: my $home='';
2700:
2701: if ($stuname) { $home=&homeserver($stuname,$domain); }
2702:
2703: $symb=&symbclean($symb);
2704: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2705:
2706: if (!$domain) { $domain=$env{'user.domain'}; }
2707: if (!$stuname) { $stuname=$env{'user.name'}; }
2708:
2709: &devalidate($symb,$stuname,$domain);
2710:
2711: $symb=escape($symb);
2712: if (!$namespace) {
2713: unless ($namespace=$env{'request.course.id'}) {
2714: return '';
2715: }
2716: }
2717: if (!$home) { $home=$env{'user.home'}; }
2718:
2719: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2720: $$storehash{'host'}=$perlvar{'lonHostID'};
2721:
2722: my $namevalue='';
2723: foreach my $key (keys(%$storehash)) {
2724: $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
2725: }
2726: $namevalue=~s/\&$//;
2727: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2728: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2729: }
2730:
2731: # -------------------------------------------------------------- Critical Store
2732:
2733: sub cstore {
2734: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2735: my $home='';
2736:
2737: if ($stuname) { $home=&homeserver($stuname,$domain); }
2738:
2739: $symb=&symbclean($symb);
2740: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2741:
2742: if (!$domain) { $domain=$env{'user.domain'}; }
2743: if (!$stuname) { $stuname=$env{'user.name'}; }
2744:
2745: &devalidate($symb,$stuname,$domain);
2746:
2747: $symb=escape($symb);
2748: if (!$namespace) {
2749: unless ($namespace=$env{'request.course.id'}) {
2750: return '';
2751: }
2752: }
2753: if (!$home) { $home=$env{'user.home'}; }
2754:
2755: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2756: $$storehash{'host'}=$perlvar{'lonHostID'};
2757:
2758: my $namevalue='';
2759: foreach my $key (keys(%$storehash)) {
2760: $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
2761: }
2762: $namevalue=~s/\&$//;
2763: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2764: return critical
2765: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2766: }
2767:
2768: # --------------------------------------------------------------------- Restore
2769:
2770: sub restore {
2771: my ($symb,$namespace,$domain,$stuname) = @_;
2772: my $home='';
2773:
2774: if ($stuname) { $home=&homeserver($stuname,$domain); }
2775:
2776: if (!$symb) {
2777: unless ($symb=escape(&symbread())) { return ''; }
2778: } else {
2779: $symb=&escape(&symbclean($symb));
2780: }
2781: if (!$namespace) {
2782: unless ($namespace=$env{'request.course.id'}) {
2783: return '';
2784: }
2785: }
2786: if (!$domain) { $domain=$env{'user.domain'}; }
2787: if (!$stuname) { $stuname=$env{'user.name'}; }
2788: if (!$home) { $home=$env{'user.home'}; }
2789: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2790:
2791: my %returnhash=();
2792: foreach my $line (split(/\&/,$answer)) {
2793: my ($name,$value)=split(/\=/,$line);
2794: $returnhash{&unescape($name)}=&thaw_unescape($value);
2795: }
2796: my $version;
2797: for ($version=1;$version<=$returnhash{'version'};$version++) {
2798: foreach my $item (split(/\:/,$returnhash{$version.':keys'})) {
2799: $returnhash{$item}=$returnhash{$version.':'.$item};
2800: }
2801: }
2802: return %returnhash;
2803: }
2804:
2805: # ---------------------------------------------------------- Course Description
2806:
2807: sub coursedescription {
2808: my ($courseid,$args)=@_;
2809: $courseid=~s/^\///;
2810: $courseid=~s/\_/\//g;
2811: my ($cdomain,$cnum)=split(/\//,$courseid);
2812: my $chome=&homeserver($cnum,$cdomain);
2813: my $normalid=$cdomain.'_'.$cnum;
2814: # need to always cache even if we get errors otherwise we keep
2815: # trying and trying and trying to get the course description.
2816: my %envhash=();
2817: my %returnhash=();
2818:
2819: my $expiretime=600;
2820: if ($env{'request.course.id'} eq $normalid) {
2821: $expiretime=120;
2822: }
2823:
2824: my $prefix='course.'.$cdomain.'_'.$cnum.'.';
2825: if (!$args->{'freshen_cache'}
2826: && ((time-$env{$prefix.'last_cache'}) < $expiretime) ) {
2827: foreach my $key (keys(%env)) {
2828: next if ($key !~ /^\Q$prefix\E(.*)/);
2829: my ($setting) = $1;
2830: $returnhash{$setting} = $env{$key};
2831: }
2832: return %returnhash;
2833: }
2834:
2835: # get the data agin
2836: if (!$args->{'one_time'}) {
2837: $envhash{'course.'.$normalid.'.last_cache'}=time;
2838: }
2839:
2840: if ($chome ne 'no_host') {
2841: %returnhash=&dump('environment',$cdomain,$cnum);
2842: if (!exists($returnhash{'con_lost'})) {
2843: $returnhash{'home'}= $chome;
2844: $returnhash{'domain'} = $cdomain;
2845: $returnhash{'num'} = $cnum;
2846: if (!defined($returnhash{'type'})) {
2847: $returnhash{'type'} = 'Course';
2848: }
2849: while (my ($name,$value) = each %returnhash) {
2850: $envhash{'course.'.$normalid.'.'.$name}=$value;
2851: }
2852: $returnhash{'url'}=&clutter($returnhash{'url'});
2853: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2854: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2855: $envhash{'course.'.$normalid.'.home'}=$chome;
2856: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2857: $envhash{'course.'.$normalid.'.num'}=$cnum;
2858: }
2859: }
2860: if (!$args->{'one_time'}) {
2861: &appenv(%envhash);
2862: }
2863: return %returnhash;
2864: }
2865:
2866: # -------------------------------------------------See if a user is privileged
2867:
2868: sub privileged {
2869: my ($username,$domain)=@_;
2870: my $rolesdump=&reply("dump:$domain:$username:roles",
2871: &homeserver($username,$domain));
2872: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2873: my $now=time;
2874: if ($rolesdump ne '') {
2875: foreach my $entry (split(/&/,$rolesdump)) {
2876: if ($entry!~/^rolesdef_/) {
2877: my ($area,$role)=split(/=/,$entry);
2878: $area=~s/\_\w\w$//;
2879: my ($trole,$tend,$tstart)=split(/_/,$role);
2880: if (($trole eq 'dc') || ($trole eq 'su')) {
2881: my $active=1;
2882: if ($tend) {
2883: if ($tend<$now) { $active=0; }
2884: }
2885: if ($tstart) {
2886: if ($tstart>$now) { $active=0; }
2887: }
2888: if ($active) { return 1; }
2889: }
2890: }
2891: }
2892: }
2893: return 0;
2894: }
2895:
2896: # -------------------------------------------------------- Get user privileges
2897:
2898: sub rolesinit {
2899: my ($domain,$username,$authhost)=@_;
2900: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2901: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2902: my %allroles=();
2903: my %allgroups=();
2904: my $now=time;
2905: my %userroles = ('user.login.time' => $now);
2906: my $group_privs;
2907:
2908: if ($rolesdump ne '') {
2909: foreach my $entry (split(/&/,$rolesdump)) {
2910: if ($entry!~/^rolesdef_/) {
2911: my ($area,$role)=split(/=/,$entry);
2912: $area=~s/\_\w\w$//;
2913: my ($trole,$tend,$tstart,$group_privs);
2914: if ($role=~/^cr/) {
2915: if ($role=~m|^(cr/$match_domain/$match_username/[a-zA-Z0-9]+)_(.*)$|) {
2916: ($trole,my $trest)=($role=~m|^(cr/$match_domain/$match_username/[a-zA-Z0-9]+)_(.*)$|);
2917: ($tend,$tstart)=split('_',$trest);
2918: } else {
2919: $trole=$role;
2920: }
2921: } elsif ($role =~ m|^gr/|) {
2922: ($trole,$tend,$tstart) = split(/_/,$role);
2923: ($trole,$group_privs) = split(/\//,$trole);
2924: $group_privs = &unescape($group_privs);
2925: } else {
2926: ($trole,$tend,$tstart)=split(/_/,$role);
2927: }
2928: my %new_role = &set_arearole($trole,$area,$tstart,$tend,$domain,
2929: $username);
2930: @userroles{keys(%new_role)} = @new_role{keys(%new_role)};
2931: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2932: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2933: if (($area ne '') && ($trole ne '')) {
2934: my $spec=$trole.'.'.$area;
2935: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2936: if ($trole =~ /^cr\//) {
2937: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2938: } elsif ($trole eq 'gr') {
2939: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
2940: } else {
2941: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2942: }
2943: }
2944: }
2945: }
2946: my ($author,$adv) = &set_userprivs(\%userroles,\%allroles,\%allgroups);
2947: $userroles{'user.adv'} = $adv;
2948: $userroles{'user.author'} = $author;
2949: $env{'user.adv'}=$adv;
2950: }
2951: return \%userroles;
2952: }
2953:
2954: sub set_arearole {
2955: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2956: # log the associated role with the area
2957: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2958: return ('user.role.'.$trole.'.'.$area => $tstart.'.'.$tend);
2959: }
2960:
2961: sub custom_roleprivs {
2962: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2963: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2964: my $homsvr=homeserver($rauthor,$rdomain);
2965: if (&hostname($homsvr) ne '') {
2966: my ($rdummy,$roledef)=
2967: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2968: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2969: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2970: if (defined($syspriv)) {
2971: $$allroles{'cm./'}.=':'.$syspriv;
2972: $$allroles{$spec.'./'}.=':'.$syspriv;
2973: }
2974: if ($tdomain ne '') {
2975: if (defined($dompriv)) {
2976: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2977: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2978: }
2979: if (($trest ne '') && (defined($coursepriv))) {
2980: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2981: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2982: }
2983: }
2984: }
2985: }
2986: }
2987:
2988: sub group_roleprivs {
2989: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
2990: my $access = 1;
2991: my $now = time;
2992: if (($tend!=0) && ($tend<$now)) { $access = 0; }
2993: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
2994: if ($access) {
2995: my ($course,$group) = ($area =~ m|(/$match_domain/$match_courseid)/([^/]+)$|);
2996: $$allgroups{$course}{$group} .=':'.$group_privs;
2997: }
2998: }
2999:
3000: sub standard_roleprivs {
3001: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
3002: if (defined($pr{$trole.':s'})) {
3003: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
3004: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
3005: }
3006: if ($tdomain ne '') {
3007: if (defined($pr{$trole.':d'})) {
3008: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
3009: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
3010: }
3011: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
3012: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
3013: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
3014: }
3015: }
3016: }
3017:
3018: sub set_userprivs {
3019: my ($userroles,$allroles,$allgroups) = @_;
3020: my $author=0;
3021: my $adv=0;
3022: my %grouproles = ();
3023: if (keys(%{$allgroups}) > 0) {
3024: foreach my $role (keys %{$allroles}) {
3025: my ($trole,$area,$sec,$extendedarea);
3026: if ($role =~ m-^(\w+|cr/$match_domain/$match_username/\w+)\.(/$match_domain/$match_courseid)(/?\w*)-) {
3027: $trole = $1;
3028: $area = $2;
3029: $sec = $3;
3030: $extendedarea = $area.$sec;
3031: if (exists($$allgroups{$area})) {
3032: foreach my $group (keys(%{$$allgroups{$area}})) {
3033: my $spec = $trole.'.'.$extendedarea;
3034: $grouproles{$spec.'.'.$area.'/'.$group} =
3035: $$allgroups{$area}{$group};
3036: }
3037: }
3038: }
3039: }
3040: }
3041: foreach my $group (keys(%grouproles)) {
3042: $$allroles{$group} = $grouproles{$group};
3043: }
3044: foreach my $role (keys(%{$allroles})) {
3045: my %thesepriv;
3046: if (($role=~/^au/) || ($role=~/^ca/)) { $author=1; }
3047: foreach my $item (split(/:/,$$allroles{$role})) {
3048: if ($item ne '') {
3049: my ($privilege,$restrictions)=split(/&/,$item);
3050: if ($restrictions eq '') {
3051: $thesepriv{$privilege}='F';
3052: } elsif ($thesepriv{$privilege} ne 'F') {
3053: $thesepriv{$privilege}.=$restrictions;
3054: }
3055: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
3056: }
3057: }
3058: my $thesestr='';
3059: foreach my $priv (keys(%thesepriv)) {
3060: $thesestr.=':'.$priv.'&'.$thesepriv{$priv};
3061: }
3062: $userroles->{'user.priv.'.$role} = $thesestr;
3063: }
3064: return ($author,$adv);
3065: }
3066:
3067: # --------------------------------------------------------------- get interface
3068:
3069: sub get {
3070: my ($namespace,$storearr,$udomain,$uname)=@_;
3071: my $items='';
3072: foreach my $item (@$storearr) {
3073: $items.=&escape($item).'&';
3074: }
3075: $items=~s/\&$//;
3076: if (!$udomain) { $udomain=$env{'user.domain'}; }
3077: if (!$uname) { $uname=$env{'user.name'}; }
3078: my $uhome=&homeserver($uname,$udomain);
3079:
3080: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
3081: my @pairs=split(/\&/,$rep);
3082: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
3083: return @pairs;
3084: }
3085: my %returnhash=();
3086: my $i=0;
3087: foreach my $item (@$storearr) {
3088: $returnhash{$item}=&thaw_unescape($pairs[$i]);
3089: $i++;
3090: }
3091: return %returnhash;
3092: }
3093:
3094: # --------------------------------------------------------------- del interface
3095:
3096: sub del {
3097: my ($namespace,$storearr,$udomain,$uname)=@_;
3098: my $items='';
3099: foreach my $item (@$storearr) {
3100: $items.=&escape($item).'&';
3101: }
3102: $items=~s/\&$//;
3103: if (!$udomain) { $udomain=$env{'user.domain'}; }
3104: if (!$uname) { $uname=$env{'user.name'}; }
3105: my $uhome=&homeserver($uname,$udomain);
3106:
3107: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
3108: }
3109:
3110: # -------------------------------------------------------------- dump interface
3111:
3112: sub dump {
3113: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
3114: if (!$udomain) { $udomain=$env{'user.domain'}; }
3115: if (!$uname) { $uname=$env{'user.name'}; }
3116: my $uhome=&homeserver($uname,$udomain);
3117: if ($regexp) {
3118: $regexp=&escape($regexp);
3119: } else {
3120: $regexp='.';
3121: }
3122: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
3123: my @pairs=split(/\&/,$rep);
3124: my %returnhash=();
3125: foreach my $item (@pairs) {
3126: my ($key,$value)=split(/=/,$item,2);
3127: $key = &unescape($key);
3128: next if ($key =~ /^error: 2 /);
3129: $returnhash{$key}=&thaw_unescape($value);
3130: }
3131: return %returnhash;
3132: }
3133:
3134: # --------------------------------------------------------- dumpstore interface
3135:
3136: sub dumpstore {
3137: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
3138: if (!$udomain) { $udomain=$env{'user.domain'}; }
3139: if (!$uname) { $uname=$env{'user.name'}; }
3140: my $uhome=&homeserver($uname,$udomain);
3141: if ($regexp) {
3142: $regexp=&escape($regexp);
3143: } else {
3144: $regexp='.';
3145: }
3146: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
3147: my @pairs=split(/\&/,$rep);
3148: my %returnhash=();
3149: foreach my $item (@pairs) {
3150: my ($key,$value)=split(/=/,$item,2);
3151: next if ($key =~ /^error: 2 /);
3152: $returnhash{$key}=&thaw_unescape($value);
3153: }
3154: return %returnhash;
3155: }
3156:
3157: # -------------------------------------------------------------- keys interface
3158:
3159: sub getkeys {
3160: my ($namespace,$udomain,$uname)=@_;
3161: if (!$udomain) { $udomain=$env{'user.domain'}; }
3162: if (!$uname) { $uname=$env{'user.name'}; }
3163: my $uhome=&homeserver($uname,$udomain);
3164: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
3165: my @keyarray=();
3166: foreach my $key (split(/\&/,$rep)) {
3167: next if ($key =~ /^error: 2 /);
3168: push(@keyarray,&unescape($key));
3169: }
3170: return @keyarray;
3171: }
3172:
3173: # --------------------------------------------------------------- currentdump
3174: sub currentdump {
3175: my ($courseid,$sdom,$sname)=@_;
3176: $courseid = $env{'request.course.id'} if (! defined($courseid));
3177: $sdom = $env{'user.domain'} if (! defined($sdom));
3178: $sname = $env{'user.name'} if (! defined($sname));
3179: my $uhome = &homeserver($sname,$sdom);
3180: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
3181: return if ($rep =~ /^(error:|no_such_host)/);
3182: #
3183: my %returnhash=();
3184: #
3185: if ($rep eq "unknown_cmd") {
3186: # an old lond will not know currentdump
3187: # Do a dump and make it look like a currentdump
3188: my @tmp = &dumpstore($courseid,$sdom,$sname,'.');
3189: return if ($tmp[0] =~ /^(error:|no_such_host)/);
3190: my %hash = @tmp;
3191: @tmp=();
3192: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
3193: } else {
3194: my @pairs=split(/\&/,$rep);
3195: foreach my $pair (@pairs) {
3196: my ($key,$value)=split(/=/,$pair,2);
3197: my ($symb,$param) = split(/:/,$key);
3198: $returnhash{&unescape($symb)}->{&unescape($param)} =
3199: &thaw_unescape($value);
3200: }
3201: }
3202: return %returnhash;
3203: }
3204:
3205: sub convert_dump_to_currentdump{
3206: my %hash = %{shift()};
3207: my %returnhash;
3208: # Code ripped from lond, essentially. The only difference
3209: # here is the unescaping done by lonnet::dump(). Conceivably
3210: # we might run in to problems with parameter names =~ /^v\./
3211: while (my ($key,$value) = each(%hash)) {
3212: my ($v,$symb,$param) = split(/:/,$key);
3213: $symb = &unescape($symb);
3214: $param = &unescape($param);
3215: next if ($v eq 'version' || $symb eq 'keys');
3216: next if (exists($returnhash{$symb}) &&
3217: exists($returnhash{$symb}->{$param}) &&
3218: $returnhash{$symb}->{'v.'.$param} > $v);
3219: $returnhash{$symb}->{$param}=$value;
3220: $returnhash{$symb}->{'v.'.$param}=$v;
3221: }
3222: #
3223: # Remove all of the keys in the hashes which keep track of
3224: # the version of the parameter.
3225: while (my ($symb,$param_hash) = each(%returnhash)) {
3226: # use a foreach because we are going to delete from the hash.
3227: foreach my $key (keys(%$param_hash)) {
3228: delete($param_hash->{$key}) if ($key =~ /^v\./);
3229: }
3230: }
3231: return \%returnhash;
3232: }
3233:
3234: # ------------------------------------------------------ critical inc interface
3235:
3236: sub cinc {
3237: return &inc(@_,'critical');
3238: }
3239:
3240: # --------------------------------------------------------------- inc interface
3241:
3242: sub inc {
3243: my ($namespace,$store,$udomain,$uname,$critical) = @_;
3244: if (!$udomain) { $udomain=$env{'user.domain'}; }
3245: if (!$uname) { $uname=$env{'user.name'}; }
3246: my $uhome=&homeserver($uname,$udomain);
3247: my $items='';
3248: if (! ref($store)) {
3249: # got a single value, so use that instead
3250: $items = &escape($store).'=&';
3251: } elsif (ref($store) eq 'SCALAR') {
3252: $items = &escape($$store).'=&';
3253: } elsif (ref($store) eq 'ARRAY') {
3254: $items = join('=&',map {&escape($_);} @{$store});
3255: } elsif (ref($store) eq 'HASH') {
3256: while (my($key,$value) = each(%{$store})) {
3257: $items.= &escape($key).'='.&escape($value).'&';
3258: }
3259: }
3260: $items=~s/\&$//;
3261: if ($critical) {
3262: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
3263: } else {
3264: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
3265: }
3266: }
3267:
3268: # --------------------------------------------------------------- put interface
3269:
3270: sub put {
3271: my ($namespace,$storehash,$udomain,$uname)=@_;
3272: if (!$udomain) { $udomain=$env{'user.domain'}; }
3273: if (!$uname) { $uname=$env{'user.name'}; }
3274: my $uhome=&homeserver($uname,$udomain);
3275: my $items='';
3276: foreach my $item (keys(%$storehash)) {
3277: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3278: }
3279: $items=~s/\&$//;
3280: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3281: }
3282:
3283: # ------------------------------------------------------------ newput interface
3284:
3285: sub newput {
3286: my ($namespace,$storehash,$udomain,$uname)=@_;
3287: if (!$udomain) { $udomain=$env{'user.domain'}; }
3288: if (!$uname) { $uname=$env{'user.name'}; }
3289: my $uhome=&homeserver($uname,$udomain);
3290: my $items='';
3291: foreach my $key (keys(%$storehash)) {
3292: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3293: }
3294: $items=~s/\&$//;
3295: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
3296: }
3297:
3298: # --------------------------------------------------------- putstore interface
3299:
3300: sub putstore {
3301: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3302: if (!$udomain) { $udomain=$env{'user.domain'}; }
3303: if (!$uname) { $uname=$env{'user.name'}; }
3304: my $uhome=&homeserver($uname,$udomain);
3305: my $items='';
3306: foreach my $key (keys(%$storehash)) {
3307: $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
3308: }
3309: $items=~s/\&$//;
3310: my $esc_symb=&escape($symb);
3311: my $esc_v=&escape($version);
3312: my $reply =
3313: &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
3314: $uhome);
3315: if ($reply eq 'unknown_cmd') {
3316: # gfall back to way things use to be done
3317: return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
3318: $uname);
3319: }
3320: return $reply;
3321: }
3322:
3323: sub old_putstore {
3324: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3325: if (!$udomain) { $udomain=$env{'user.domain'}; }
3326: if (!$uname) { $uname=$env{'user.name'}; }
3327: my $uhome=&homeserver($uname,$udomain);
3328: my %newstorehash;
3329: foreach my $item (keys(%$storehash)) {
3330: my $key = $version.':'.&escape($symb).':'.$item;
3331: $newstorehash{$key} = $storehash->{$item};
3332: }
3333: my $items='';
3334: my %allitems = ();
3335: foreach my $item (keys(%newstorehash)) {
3336: if ($item =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
3337: my $key = $1.':keys:'.$2;
3338: $allitems{$key} .= $3.':';
3339: }
3340: $items.=$item.'='.&freeze_escape($newstorehash{$item}).'&';
3341: }
3342: foreach my $item (keys(%allitems)) {
3343: $allitems{$item} =~ s/\:$//;
3344: $items.= $item.'='.$allitems{$item}.'&';
3345: }
3346: $items=~s/\&$//;
3347: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3348: }
3349:
3350: # ------------------------------------------------------ critical put interface
3351:
3352: sub cput {
3353: my ($namespace,$storehash,$udomain,$uname)=@_;
3354: if (!$udomain) { $udomain=$env{'user.domain'}; }
3355: if (!$uname) { $uname=$env{'user.name'}; }
3356: my $uhome=&homeserver($uname,$udomain);
3357: my $items='';
3358: foreach my $item (keys(%$storehash)) {
3359: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3360: }
3361: $items=~s/\&$//;
3362: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
3363: }
3364:
3365: # -------------------------------------------------------------- eget interface
3366:
3367: sub eget {
3368: my ($namespace,$storearr,$udomain,$uname)=@_;
3369: my $items='';
3370: foreach my $item (@$storearr) {
3371: $items.=&escape($item).'&';
3372: }
3373: $items=~s/\&$//;
3374: if (!$udomain) { $udomain=$env{'user.domain'}; }
3375: if (!$uname) { $uname=$env{'user.name'}; }
3376: my $uhome=&homeserver($uname,$udomain);
3377: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3378: my @pairs=split(/\&/,$rep);
3379: my %returnhash=();
3380: my $i=0;
3381: foreach my $item (@$storearr) {
3382: $returnhash{$item}=&thaw_unescape($pairs[$i]);
3383: $i++;
3384: }
3385: return %returnhash;
3386: }
3387:
3388: # ------------------------------------------------------------ tmpput interface
3389: sub tmpput {
3390: my ($storehash,$server,$context)=@_;
3391: my $items='';
3392: foreach my $item (keys(%$storehash)) {
3393: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3394: }
3395: $items=~s/\&$//;
3396: if (defined($context)) {
3397: $items .= ':'.&escape($context);
3398: }
3399: return &reply("tmpput:$items",$server);
3400: }
3401:
3402: # ------------------------------------------------------------ tmpget interface
3403: sub tmpget {
3404: my ($token,$server)=@_;
3405: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3406: my $rep=&reply("tmpget:$token",$server);
3407: my %returnhash;
3408: foreach my $item (split(/\&/,$rep)) {
3409: my ($key,$value)=split(/=/,$item);
3410: $returnhash{&unescape($key)}=&thaw_unescape($value);
3411: }
3412: return %returnhash;
3413: }
3414:
3415: # ------------------------------------------------------------ tmpget interface
3416: sub tmpdel {
3417: my ($token,$server)=@_;
3418: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3419: return &reply("tmpdel:$token",$server);
3420: }
3421:
3422: # -------------------------------------------------- portfolio access checking
3423:
3424: sub portfolio_access {
3425: my ($requrl) = @_;
3426: my (undef,$udom,$unum,$file_name,$group) = &parse_portfolio_url($requrl);
3427: my $result = &get_portfolio_access($udom,$unum,$file_name,$group);
3428: if ($result) {
3429: my %setters;
3430: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3431: my ($startblock,$endblock) =
3432: &Apache::loncommon::blockcheck(\%setters,'port',$unum,$udom);
3433: if ($startblock && $endblock) {
3434: return 'B';
3435: }
3436: } else {
3437: my ($startblock,$endblock) =
3438: &Apache::loncommon::blockcheck(\%setters,'port');
3439: if ($startblock && $endblock) {
3440: return 'B';
3441: }
3442: }
3443: }
3444: if ($result eq 'ok') {
3445: return 'F';
3446: } elsif ($result =~ /^[^:]+:guest_/) {
3447: return 'A';
3448: }
3449: return '';
3450: }
3451:
3452: sub get_portfolio_access {
3453: my ($udom,$unum,$file_name,$group,$access_hash) = @_;
3454:
3455: if (!ref($access_hash)) {
3456: my $current_perms = &get_portfile_permissions($udom,$unum);
3457: my %access_controls = &get_access_controls($current_perms,$group,
3458: $file_name);
3459: $access_hash = $access_controls{$file_name};
3460: }
3461:
3462: my ($public,$guest,@domains,@users,@courses,@groups);
3463: my $now = time;
3464: if (ref($access_hash) eq 'HASH') {
3465: foreach my $key (keys(%{$access_hash})) {
3466: my ($num,$scope,$end,$start) = ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
3467: if ($start > $now) {
3468: next;
3469: }
3470: if ($end && $end<$now) {
3471: next;
3472: }
3473: if ($scope eq 'public') {
3474: $public = $key;
3475: last;
3476: } elsif ($scope eq 'guest') {
3477: $guest = $key;
3478: } elsif ($scope eq 'domains') {
3479: push(@domains,$key);
3480: } elsif ($scope eq 'users') {
3481: push(@users,$key);
3482: } elsif ($scope eq 'course') {
3483: push(@courses,$key);
3484: } elsif ($scope eq 'group') {
3485: push(@groups,$key);
3486: }
3487: }
3488: if ($public) {
3489: return 'ok';
3490: }
3491: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3492: if ($guest) {
3493: return $guest;
3494: }
3495: } else {
3496: if (@domains > 0) {
3497: foreach my $domkey (@domains) {
3498: if (ref($access_hash->{$domkey}{'dom'}) eq 'ARRAY') {
3499: if (grep(/^\Q$env{'user.domain'}\E$/,@{$access_hash->{$domkey}{'dom'}})) {
3500: return 'ok';
3501: }
3502: }
3503: }
3504: }
3505: if (@users > 0) {
3506: foreach my $userkey (@users) {
3507: if (exists($access_hash->{$userkey}{'users'}{$env{'user.name'}.':'.$env{'user.domain'}})) {
3508: return 'ok';
3509: }
3510: }
3511: }
3512: my %roleshash;
3513: my @courses_and_groups = @courses;
3514: push(@courses_and_groups,@groups);
3515: if (@courses_and_groups > 0) {
3516: my (%allgroups,%allroles);
3517: my ($start,$end,$role,$sec,$group);
3518: foreach my $envkey (%env) {
3519: if ($envkey =~ m-^user\.role\.(gr|cc|in|ta|ep|st)\./($match_domain)/($match_courseid)/?([^/]*)$-) {
3520: my $cid = $2.'_'.$3;
3521: if ($1 eq 'gr') {
3522: $group = $4;
3523: $allgroups{$cid}{$group} = $env{$envkey};
3524: } else {
3525: if ($4 eq '') {
3526: $sec = 'none';
3527: } else {
3528: $sec = $4;
3529: }
3530: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3531: }
3532: } elsif ($envkey =~ m-^user\.role\./cr/($match_domain/$match_username/\w*)./($match_domain)/($match_courseid)/?([^/]*)$-) {
3533: my $cid = $2.'_'.$3;
3534: if ($4 eq '') {
3535: $sec = 'none';
3536: } else {
3537: $sec = $4;
3538: }
3539: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3540: }
3541: }
3542: if (keys(%allroles) == 0) {
3543: return;
3544: }
3545: foreach my $key (@courses_and_groups) {
3546: my %content = %{$$access_hash{$key}};
3547: my $cnum = $content{'number'};
3548: my $cdom = $content{'domain'};
3549: my $cid = $cdom.'_'.$cnum;
3550: if (!exists($allroles{$cid})) {
3551: next;
3552: }
3553: foreach my $role_id (keys(%{$content{'roles'}})) {
3554: my @sections = @{$content{'roles'}{$role_id}{'section'}};
3555: my @groups = @{$content{'roles'}{$role_id}{'group'}};
3556: my @status = @{$content{'roles'}{$role_id}{'access'}};
3557: my @roles = @{$content{'roles'}{$role_id}{'role'}};
3558: foreach my $role (keys(%{$allroles{$cid}})) {
3559: if ((grep/^all$/,@roles) || (grep/^\Q$role\E$/,@roles)) {
3560: foreach my $sec (keys(%{$allroles{$cid}{$role}})) {
3561: if (&course_group_datechecker($allroles{$cid}{$role}{$sec},$now,\@status) eq 'ok') {
3562: if (grep/^all$/,@sections) {
3563: return 'ok';
3564: } else {
3565: if (grep/^$sec$/,@sections) {
3566: return 'ok';
3567: }
3568: }
3569: }
3570: }
3571: if (keys(%{$allgroups{$cid}}) == 0) {
3572: if (grep/^none$/,@groups) {
3573: return 'ok';
3574: }
3575: } else {
3576: if (grep/^all$/,@groups) {
3577: return 'ok';
3578: }
3579: foreach my $group (keys(%{$allgroups{$cid}})) {
3580: if (grep/^$group$/,@groups) {
3581: return 'ok';
3582: }
3583: }
3584: }
3585: }
3586: }
3587: }
3588: }
3589: }
3590: if ($guest) {
3591: return $guest;
3592: }
3593: }
3594: }
3595: return;
3596: }
3597:
3598: sub course_group_datechecker {
3599: my ($dates,$now,$status) = @_;
3600: my ($start,$end) = split(/\./,$dates);
3601: if (!$start && !$end) {
3602: return 'ok';
3603: }
3604: if (grep/^active$/,@{$status}) {
3605: if (((!$start) || ($start && $start <= $now)) && ((!$end) || ($end && $end >= $now))) {
3606: return 'ok';
3607: }
3608: }
3609: if (grep/^previous$/,@{$status}) {
3610: if ($end > $now ) {
3611: return 'ok';
3612: }
3613: }
3614: if (grep/^future$/,@{$status}) {
3615: if ($start > $now) {
3616: return 'ok';
3617: }
3618: }
3619: return;
3620: }
3621:
3622: sub parse_portfolio_url {
3623: my ($url) = @_;
3624:
3625: my ($type,$udom,$unum,$group,$file_name);
3626:
3627: if ($url =~ m-^/*(?:uploaded|editupload)/($match_domain)/($match_username)/portfolio(/.+)$-) {
3628: $type = 1;
3629: $udom = $1;
3630: $unum = $2;
3631: $file_name = $3;
3632: } elsif ($url =~ m-^/*(?:uploaded|editupload)/($match_domain)/($match_courseid)/groups/([^/]+)/portfolio/(.+)$-) {
3633: $type = 2;
3634: $udom = $1;
3635: $unum = $2;
3636: $group = $3;
3637: $file_name = $3.'/'.$4;
3638: }
3639: if (wantarray) {
3640: return ($type,$udom,$unum,$file_name,$group);
3641: }
3642: return $type;
3643: }
3644:
3645: sub is_portfolio_url {
3646: my ($url) = @_;
3647: return scalar(&parse_portfolio_url($url));
3648: }
3649:
3650: sub is_portfolio_file {
3651: my ($file) = @_;
3652: if (($file =~ /^portfolio/) || ($file =~ /^groups\/\w+\/portfolio/)) {
3653: return 1;
3654: }
3655: return;
3656: }
3657:
3658:
3659: # ---------------------------------------------- Custom access rule evaluation
3660:
3661: sub customaccess {
3662: my ($priv,$uri)=@_;
3663: my ($urole,$urealm)=split(/\./,$env{'request.role'},2);
3664: my (undef,$udom,$ucrs,$usec)=split(/\//,$urealm);
3665: $udom = &LONCAPA::clean_domain($udom);
3666: $ucrs = &LONCAPA::clean_username($ucrs);
3667: my $access=0;
3668: foreach my $right (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
3669: my ($effect,$realm,$role)=split(/\:/,$right);
3670: if ($role) {
3671: if ($role ne $urole) { next; }
3672: }
3673: foreach my $scope (split(/\s*\,\s*/,$realm)) {
3674: my ($tdom,$tcrs,$tsec)=split(/\_/,$scope);
3675: if ($tdom) {
3676: if ($tdom ne $udom) { next; }
3677: }
3678: if ($tcrs) {
3679: if ($tcrs ne $ucrs) { next; }
3680: }
3681: if ($tsec) {
3682: if ($tsec ne $usec) { next; }
3683: }
3684: $access=($effect eq 'allow');
3685: last;
3686: }
3687: if ($realm eq '' && $role eq '') {
3688: $access=($effect eq 'allow');
3689: }
3690: }
3691: return $access;
3692: }
3693:
3694: # ------------------------------------------------- Check for a user privilege
3695:
3696: sub allowed {
3697: my ($priv,$uri,$symb,$role)=@_;
3698: my $ver_orguri=$uri;
3699: $uri=&deversion($uri);
3700: my $orguri=$uri;
3701: $uri=&declutter($uri);
3702:
3703: if ($priv eq 'evb') {
3704: # Evade communication block restrictions for specified role in a course
3705: if ($env{'user.priv.'.$role} =~/evb\&([^\:]*)/) {
3706: return $1;
3707: } else {
3708: return;
3709: }
3710: }
3711:
3712: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3713: # Free bre access to adm and meta resources
3714: if (((($uri=~/^adm\//) && ($uri !~ m{/(?:smppg|bulletinboard)$}))
3715: || (($uri=~/\.meta$/) && ($uri!~m|^uploaded/|) ))
3716: && ($priv eq 'bre')) {
3717: return 'F';
3718: }
3719:
3720: # Free bre access to user's own portfolio contents
3721: my ($space,$domain,$name,@dir)=split('/',$uri);
3722: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3723: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
3724: my %setters;
3725: my ($startblock,$endblock) =
3726: &Apache::loncommon::blockcheck(\%setters,'port');
3727: if ($startblock && $endblock) {
3728: return 'B';
3729: } else {
3730: return 'F';
3731: }
3732: }
3733:
3734: # bre access to group portfolio for rgf priv in group, or mdg or vcg in course.
3735: if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
3736: && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
3737: if (exists($env{'request.course.id'})) {
3738: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
3739: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
3740: if (($domain eq $cdom) && ($name eq $cnum)) {
3741: my $courseprivid=$env{'request.course.id'};
3742: $courseprivid=~s/\_/\//;
3743: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
3744: .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
3745: return $1;
3746: } else {
3747: if ($env{'request.course.sec'}) {
3748: $courseprivid.='/'.$env{'request.course.sec'};
3749: }
3750: if ($env{'user.priv.'.$env{'request.role'}.'./'.
3751: $courseprivid} =~/(mdg|vcg)\&([^\:]*)/) {
3752: return $2;
3753: }
3754: }
3755: }
3756: }
3757: }
3758:
3759: # Free bre to public access
3760:
3761: if ($priv eq 'bre') {
3762: my $copyright=&metadata($uri,'copyright');
3763: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3764: return 'F';
3765: }
3766: if ($copyright eq 'priv') {
3767: $uri=~/([^\/]+)\/([^\/]+)\//;
3768: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3769: return '';
3770: }
3771: }
3772: if ($copyright eq 'domain') {
3773: $uri=~/([^\/]+)\/([^\/]+)\//;
3774: unless (($env{'user.domain'} eq $1) ||
3775: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3776: return '';
3777: }
3778: }
3779: if ($env{'request.role'}=~ /li\.\//) {
3780: # Library role, so allow browsing of resources in this domain.
3781: return 'F';
3782: }
3783: if ($copyright eq 'custom') {
3784: unless (&customaccess($priv,$uri)) { return ''; }
3785: }
3786: }
3787: # Domain coordinator is trying to create a course
3788: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3789: # uri is the requested domain in this case.
3790: # comparison to 'request.role.domain' shows if the user has selected
3791: # a role of dc for the domain in question.
3792: return 'F' if ($uri eq $env{'request.role.domain'});
3793: }
3794:
3795: my $thisallowed='';
3796: my $statecond=0;
3797: my $courseprivid='';
3798:
3799: # Course
3800:
3801: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3802: $thisallowed.=$1;
3803: }
3804:
3805: # Domain
3806:
3807: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3808: =~/\Q$priv\E\&([^\:]*)/) {
3809: $thisallowed.=$1;
3810: }
3811:
3812: # Course: uri itself is a course
3813: my $courseuri=$uri;
3814: $courseuri=~s/\_(\d)/\/$1/;
3815: $courseuri=~s/^([^\/])/\/$1/;
3816:
3817: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3818: =~/\Q$priv\E\&([^\:]*)/) {
3819: $thisallowed.=$1;
3820: }
3821:
3822: # URI is an uploaded document for this course, default permissions don't matter
3823: # not allowing 'edit' access (editupload) to uploaded course docs
3824: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3825: $thisallowed='';
3826: my ($match)=&is_on_map($uri);
3827: if ($match) {
3828: if ($env{'user.priv.'.$env{'request.role'}.'./'}
3829: =~/\Q$priv\E\&([^\:]*)/) {
3830: $thisallowed.=$1;
3831: }
3832: } else {
3833: my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
3834: if ($refuri) {
3835: if ($refuri =~ m|^/adm/|) {
3836: $thisallowed='F';
3837: } else {
3838: $refuri=&declutter($refuri);
3839: my ($match) = &is_on_map($refuri);
3840: if ($match) {
3841: $thisallowed='F';
3842: }
3843: }
3844: }
3845: }
3846: }
3847:
3848: if ($priv eq 'bre'
3849: && $thisallowed ne 'F'
3850: && $thisallowed ne '2'
3851: && &is_portfolio_url($uri)) {
3852: $thisallowed = &portfolio_access($uri);
3853: }
3854:
3855: # Full access at system, domain or course-wide level? Exit.
3856:
3857: if ($thisallowed=~/F/) {
3858: return 'F';
3859: }
3860:
3861: # If this is generating or modifying users, exit with special codes
3862:
3863: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3864: if (($priv eq 'cca') || ($priv eq 'caa')) {
3865: my ($audom,$auname)=split('/',$uri);
3866: # no author name given, so this just checks on the general right to make a co-author in this domain
3867: unless ($auname) { return $thisallowed; }
3868: # an author name is given, so we are about to actually make a co-author for a certain account
3869: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3870: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3871: ($audom ne $env{'request.role.domain'}))) { return ''; }
3872: }
3873: return $thisallowed;
3874: }
3875: #
3876: # Gathered so far: system, domain and course wide privileges
3877: #
3878: # Course: See if uri or referer is an individual resource that is part of
3879: # the course
3880:
3881: if ($env{'request.course.id'}) {
3882:
3883: $courseprivid=$env{'request.course.id'};
3884: if ($env{'request.course.sec'}) {
3885: $courseprivid.='/'.$env{'request.course.sec'};
3886: }
3887: $courseprivid=~s/\_/\//;
3888: my $checkreferer=1;
3889: my ($match,$cond)=&is_on_map($uri);
3890: if ($match) {
3891: $statecond=$cond;
3892: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3893: =~/\Q$priv\E\&([^\:]*)/) {
3894: $thisallowed.=$1;
3895: $checkreferer=0;
3896: }
3897: }
3898:
3899: if ($checkreferer) {
3900: my $refuri=$env{'httpref.'.$orguri};
3901: unless ($refuri) {
3902: foreach my $key (keys(%env)) {
3903: if ($key=~/^httpref\..*\*/) {
3904: my $pattern=$key;
3905: $pattern=~s/^httpref\.\/res\///;
3906: $pattern=~s/\*/\[\^\/\]\+/g;
3907: $pattern=~s/\//\\\//g;
3908: if ($orguri=~/$pattern/) {
3909: $refuri=$env{$key};
3910: }
3911: }
3912: }
3913: }
3914:
3915: if ($refuri) {
3916: $refuri=&declutter($refuri);
3917: my ($match,$cond)=&is_on_map($refuri);
3918: if ($match) {
3919: my $refstatecond=$cond;
3920: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3921: =~/\Q$priv\E\&([^\:]*)/) {
3922: $thisallowed.=$1;
3923: $uri=$refuri;
3924: $statecond=$refstatecond;
3925: }
3926: }
3927: }
3928: }
3929: }
3930:
3931: #
3932: # Gathered now: all privileges that could apply, and condition number
3933: #
3934: #
3935: # Full or no access?
3936: #
3937:
3938: if ($thisallowed=~/F/) {
3939: return 'F';
3940: }
3941:
3942: unless ($thisallowed) {
3943: return '';
3944: }
3945:
3946: # Restrictions exist, deal with them
3947: #
3948: # C:according to course preferences
3949: # R:according to resource settings
3950: # L:unless locked
3951: # X:according to user session state
3952: #
3953:
3954: # Possibly locked functionality, check all courses
3955: # Locks might take effect only after 10 minutes cache expiration for other
3956: # courses, and 2 minutes for current course
3957:
3958: my $envkey;
3959: if ($thisallowed=~/L/) {
3960: foreach $envkey (keys %env) {
3961: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3962: my $courseid=$2;
3963: my $roleid=$1.'.'.$2;
3964: $courseid=~s/^\///;
3965: my $expiretime=600;
3966: if ($env{'request.role'} eq $roleid) {
3967: $expiretime=120;
3968: }
3969: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3970: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3971: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3972: &coursedescription($courseid,{'freshen_cache' => 1});
3973: }
3974: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3975: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3976: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3977: &log($env{'user.domain'},$env{'user.name'},
3978: $env{'user.home'},
3979: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3980: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3981: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3982: return '';
3983: }
3984: }
3985: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3986: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3987: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3988: &log($env{'user.domain'},$env{'user.name'},
3989: $env{'user.home'},
3990: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3991: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3992: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3993: return '';
3994: }
3995: }
3996: }
3997: }
3998: }
3999:
4000: #
4001: # Rest of the restrictions depend on selected course
4002: #
4003:
4004: unless ($env{'request.course.id'}) {
4005: if ($thisallowed eq 'A') {
4006: return 'A';
4007: } elsif ($thisallowed eq 'B') {
4008: return 'B';
4009: } else {
4010: return '1';
4011: }
4012: }
4013:
4014: #
4015: # Now user is definitely in a course
4016: #
4017:
4018:
4019: # Course preferences
4020:
4021: if ($thisallowed=~/C/) {
4022: my $rolecode=(split(/\./,$env{'request.role'}))[0];
4023: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
4024: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
4025: =~/\Q$rolecode\E/) {
4026: if ($priv ne 'pch') {
4027: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
4028: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
4029: $env{'request.course.id'});
4030: }
4031: return '';
4032: }
4033:
4034: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
4035: =~/\Q$unamedom\E/) {
4036: if ($priv ne 'pch') {
4037: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
4038: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
4039: $env{'request.course.id'});
4040: }
4041: return '';
4042: }
4043: }
4044:
4045: # Resource preferences
4046:
4047: if ($thisallowed=~/R/) {
4048: my $rolecode=(split(/\./,$env{'request.role'}))[0];
4049: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
4050: if ($priv ne 'pch') {
4051: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
4052: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
4053: }
4054: return '';
4055: }
4056: }
4057:
4058: # Restricted by state or randomout?
4059:
4060: if ($thisallowed=~/X/) {
4061: if ($env{'acc.randomout'}) {
4062: if (!$symb) { $symb=&symbread($uri,1); }
4063: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
4064: return '';
4065: }
4066: }
4067: if (&condval($statecond)) {
4068: return '2';
4069: } else {
4070: return '';
4071: }
4072: }
4073:
4074: if ($thisallowed eq 'A') {
4075: return 'A';
4076: } elsif ($thisallowed eq 'B') {
4077: return 'B';
4078: }
4079: return 'F';
4080: }
4081:
4082: sub split_uri_for_cond {
4083: my $uri=&deversion(&declutter(shift));
4084: my @uriparts=split(/\//,$uri);
4085: my $filename=pop(@uriparts);
4086: my $pathname=join('/',@uriparts);
4087: return ($pathname,$filename);
4088: }
4089: # --------------------------------------------------- Is a resource on the map?
4090:
4091: sub is_on_map {
4092: my ($pathname,$filename) = &split_uri_for_cond(shift);
4093: #Trying to find the conditional for the file
4094: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
4095: /\&\Q$filename\E\:([\d\|]+)\&/);
4096: if ($match) {
4097: return (1,$1);
4098: } else {
4099: return (0,0);
4100: }
4101: }
4102:
4103: # --------------------------------------------------------- Get symb from alias
4104:
4105: sub get_symb_from_alias {
4106: my $symb=shift;
4107: my ($map,$resid,$url)=&decode_symb($symb);
4108: # Already is a symb
4109: if ($url) { return $symb; }
4110: # Must be an alias
4111: my $aliassymb='';
4112: my %bighash;
4113: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4114: &GDBM_READER(),0640)) {
4115: my $rid=$bighash{'mapalias_'.$symb};
4116: if ($rid) {
4117: my ($mapid,$resid)=split(/\./,$rid);
4118: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
4119: $resid,$bighash{'src_'.$rid});
4120: }
4121: untie %bighash;
4122: }
4123: return $aliassymb;
4124: }
4125:
4126: # ----------------------------------------------------------------- Define Role
4127:
4128: sub definerole {
4129: if (allowed('mcr','/')) {
4130: my ($rolename,$sysrole,$domrole,$courole)=@_;
4131: foreach my $role (split(':',$sysrole)) {
4132: my ($crole,$cqual)=split(/\&/,$role);
4133: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
4134: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
4135: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
4136: return "refused:s:$crole&$cqual";
4137: }
4138: }
4139: }
4140: foreach my $role (split(':',$domrole)) {
4141: my ($crole,$cqual)=split(/\&/,$role);
4142: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
4143: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
4144: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
4145: return "refused:d:$crole&$cqual";
4146: }
4147: }
4148: }
4149: foreach my $role (split(':',$courole)) {
4150: my ($crole,$cqual)=split(/\&/,$role);
4151: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
4152: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
4153: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
4154: return "refused:c:$crole&$cqual";
4155: }
4156: }
4157: }
4158: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4159: "$env{'user.domain'}:$env{'user.name'}:".
4160: "rolesdef_$rolename=".
4161: escape($sysrole.'_'.$domrole.'_'.$courole);
4162: return reply($command,$env{'user.home'});
4163: } else {
4164: return 'refused';
4165: }
4166: }
4167:
4168: # ---------------- Make a metadata query against the network of library servers
4169:
4170: sub metadata_query {
4171: my ($query,$custom,$customshow,$server_array)=@_;
4172: my %rhash;
4173: my @server_list = (defined($server_array) ? @$server_array
4174: : keys(%libserv) );
4175: for my $server (@server_list) {
4176: unless ($custom or $customshow) {
4177: my $reply=&reply("querysend:".&escape($query),$server);
4178: $rhash{$server}=$reply;
4179: }
4180: else {
4181: my $reply=&reply("querysend:".&escape($query).':'.
4182: &escape($custom).':'.&escape($customshow),
4183: $server);
4184: $rhash{$server}=$reply;
4185: }
4186: }
4187: return \%rhash;
4188: }
4189:
4190: # ----------------------------------------- Send log queries and wait for reply
4191:
4192: sub log_query {
4193: my ($uname,$udom,$query,%filters)=@_;
4194: my $uhome=&homeserver($uname,$udom);
4195: if ($uhome eq 'no_host') { return 'error: no_host'; }
4196: my $uhost=&hostname($uhome);
4197: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys(%filters)));
4198: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
4199: $uhome);
4200: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
4201: return get_query_reply($queryid);
4202: }
4203:
4204: # -------------------------- Update MySQL table for portfolio file
4205:
4206: sub update_portfolio_table {
4207: my ($uname,$udom,$file_name,$query,$group,$action) = @_;
4208: my $homeserver = &homeserver($uname,$udom);
4209: my $queryid=
4210: &reply("querysend:".$query.':'.&escape($uname.':'.$udom.':'.$group).
4211: ':'.&escape($file_name).':'.$action,$homeserver);
4212: my $reply = &get_query_reply($queryid);
4213: return $reply;
4214: }
4215:
4216: # ------- Request retrieval of institutional classlists for course(s)
4217:
4218: sub fetch_enrollment_query {
4219: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
4220: my $homeserver;
4221: my $maxtries = 1;
4222: if ($context eq 'automated') {
4223: $homeserver = $perlvar{'lonHostID'};
4224: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
4225: } else {
4226: $homeserver = &homeserver($cnum,$dom);
4227: }
4228: my $host=&hostname($homeserver);
4229: my $cmd = '';
4230: foreach my $affiliate (keys %{$affiliatesref}) {
4231: $cmd .= $affiliate.'='.join(",",@{$$affiliatesref{$affiliate}}).'%%';
4232: }
4233: $cmd =~ s/%%$//;
4234: $cmd = &escape($cmd);
4235: my $query = 'fetchenrollment';
4236: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
4237: unless ($queryid=~/^\Q$host\E\_/) {
4238: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
4239: return 'error: '.$queryid;
4240: }
4241: my $reply = &get_query_reply($queryid);
4242: my $tries = 1;
4243: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4244: $reply = &get_query_reply($queryid);
4245: $tries ++;
4246: }
4247: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4248: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4249: } else {
4250: my @responses = split/:/,$reply;
4251: if ($homeserver eq $perlvar{'lonHostID'}) {
4252: foreach my $line (@responses) {
4253: my ($key,$value) = split(/=/,$line,2);
4254: $$replyref{$key} = $value;
4255: }
4256: } else {
4257: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
4258: foreach my $line (@responses) {
4259: my ($key,$value) = split(/=/,$line);
4260: $$replyref{$key} = $value;
4261: if ($value > 0) {
4262: foreach my $item (@{$$affiliatesref{$key}}) {
4263: my $filename = $dom.'_'.$key.'_'.$item.'_classlist.xml';
4264: my $destname = $pathname.'/'.$filename;
4265: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
4266: if ($xml_classlist =~ /^error/) {
4267: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
4268: } else {
4269: if ( open(FILE,">$destname") ) {
4270: print FILE &unescape($xml_classlist);
4271: close(FILE);
4272: } else {
4273: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
4274: }
4275: }
4276: }
4277: }
4278: }
4279: }
4280: return 'ok';
4281: }
4282: return 'error';
4283: }
4284:
4285: sub get_query_reply {
4286: my $queryid=shift;
4287: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
4288: my $reply='';
4289: for (1..100) {
4290: sleep 2;
4291: if (-e $replyfile.'.end') {
4292: if (open(my $fh,$replyfile)) {
4293: $reply.=<$fh>;
4294: close($fh);
4295: } else { return 'error: reply_file_error'; }
4296: return &unescape($reply);
4297: }
4298: }
4299: return 'timeout:'.$queryid;
4300: }
4301:
4302: sub courselog_query {
4303: #
4304: # possible filters:
4305: # url: url or symb
4306: # username
4307: # domain
4308: # action: view, submit, grade
4309: # start: timestamp
4310: # end: timestamp
4311: #
4312: my (%filters)=@_;
4313: unless ($env{'request.course.id'}) { return 'no_course'; }
4314: if ($filters{'url'}) {
4315: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
4316: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
4317: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
4318: }
4319: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
4320: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
4321: return &log_query($cname,$cdom,'courselog',%filters);
4322: }
4323:
4324: sub userlog_query {
4325: my ($uname,$udom,%filters)=@_;
4326: return &log_query($uname,$udom,'userlog',%filters);
4327: }
4328:
4329: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
4330:
4331: sub auto_run {
4332: my ($cnum,$cdom) = @_;
4333: my $homeserver = &homeserver($cnum,$cdom);
4334: my $response = &reply('autorun:'.$cdom,$homeserver);
4335: return $response;
4336: }
4337:
4338: sub auto_get_sections {
4339: my ($cnum,$cdom,$inst_coursecode) = @_;
4340: my $homeserver = &homeserver($cnum,$cdom);
4341: my @secs = ();
4342: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
4343: unless ($response eq 'refused') {
4344: @secs = split/:/,$response;
4345: }
4346: return @secs;
4347: }
4348:
4349: sub auto_new_course {
4350: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
4351: my $homeserver = &homeserver($cnum,$cdom);
4352: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
4353: return $response;
4354: }
4355:
4356: sub auto_validate_courseID {
4357: my ($cnum,$cdom,$inst_course_id) = @_;
4358: my $homeserver = &homeserver($cnum,$cdom);
4359: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
4360: return $response;
4361: }
4362:
4363: sub auto_create_password {
4364: my ($cnum,$cdom,$authparam) = @_;
4365: my $homeserver = &homeserver($cnum,$cdom);
4366: my $create_passwd = 0;
4367: my $authchk = '';
4368: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
4369: if ($response eq 'refused') {
4370: $authchk = 'refused';
4371: } else {
4372: ($authparam,$create_passwd,$authchk) = split/:/,$response;
4373: }
4374: return ($authparam,$create_passwd,$authchk);
4375: }
4376:
4377: sub auto_photo_permission {
4378: my ($cnum,$cdom,$students) = @_;
4379: my $homeserver = &homeserver($cnum,$cdom);
4380: my ($outcome,$perm_reqd,$conditions) =
4381: split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
4382: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4383: return (undef,undef);
4384: }
4385: return ($outcome,$perm_reqd,$conditions);
4386: }
4387:
4388: sub auto_checkphotos {
4389: my ($uname,$udom,$pid) = @_;
4390: my $homeserver = &homeserver($uname,$udom);
4391: my ($result,$resulttype);
4392: my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
4393: &escape($uname).':'.&escape($pid),
4394: $homeserver));
4395: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4396: return (undef,undef);
4397: }
4398: if ($outcome) {
4399: ($result,$resulttype) = split(/:/,$outcome);
4400: }
4401: return ($result,$resulttype);
4402: }
4403:
4404: sub auto_photochoice {
4405: my ($cnum,$cdom) = @_;
4406: my $homeserver = &homeserver($cnum,$cdom);
4407: my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
4408: &escape($cdom),
4409: $homeserver)));
4410: if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4411: return (undef,undef);
4412: }
4413: return ($update,$comment);
4414: }
4415:
4416: sub auto_photoupdate {
4417: my ($affiliatesref,$dom,$cnum,$photo) = @_;
4418: my $homeserver = &homeserver($cnum,$dom);
4419: my $host=&hostname($homeserver);
4420: my $cmd = '';
4421: my $maxtries = 1;
4422: foreach my $affiliate (keys(%{$affiliatesref})) {
4423: $cmd .= $affiliate.'='.join(",",@{$$affiliatesref{$affiliate}}).'%%';
4424: }
4425: $cmd =~ s/%%$//;
4426: $cmd = &escape($cmd);
4427: my $query = 'institutionalphotos';
4428: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
4429: unless ($queryid=~/^\Q$host\E\_/) {
4430: &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
4431: return 'error: '.$queryid;
4432: }
4433: my $reply = &get_query_reply($queryid);
4434: my $tries = 1;
4435: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4436: $reply = &get_query_reply($queryid);
4437: $tries ++;
4438: }
4439: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4440: &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4441: } else {
4442: my @responses = split(/:/,$reply);
4443: my $outcome = shift(@responses);
4444: foreach my $item (@responses) {
4445: my ($key,$value) = split(/=/,$item);
4446: $$photo{$key} = $value;
4447: }
4448: return $outcome;
4449: }
4450: return 'error';
4451: }
4452:
4453: sub auto_instcode_format {
4454: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,
4455: $cat_order) = @_;
4456: my $courses = '';
4457: my @homeservers;
4458: if ($caller eq 'global') {
4459: my %servers = &get_servers($codedom,'library');
4460: foreach my $tryserver (keys(%servers)) {
4461: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4462: push(@homeservers,$tryserver);
4463: }
4464: }
4465: } else {
4466: push(@homeservers,&homeserver($caller,$codedom));
4467: }
4468: foreach my $code (keys(%{$instcodes})) {
4469: $courses .= &escape($code).'='.&escape($$instcodes{$code}).'&';
4470: }
4471: chop($courses);
4472: my $ok_response = 0;
4473: my $response;
4474: while (@homeservers > 0 && $ok_response == 0) {
4475: my $server = shift(@homeservers);
4476: $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$server);
4477: if ($response !~ /(con_lost|error|no_such_host|refused)/) {
4478: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) =
4479: split/:/,$response;
4480: %{$codes} = (%{$codes},&str2hash($codes_str));
4481: push(@{$codetitles},&str2array($codetitles_str));
4482: %{$cat_titles} = (%{$cat_titles},&str2hash($cat_titles_str));
4483: %{$cat_order} = (%{$cat_order},&str2hash($cat_order_str));
4484: $ok_response = 1;
4485: }
4486: }
4487: if ($ok_response) {
4488: return 'ok';
4489: } else {
4490: return $response;
4491: }
4492: }
4493:
4494: sub auto_instcode_defaults {
4495: my ($domain,$returnhash,$code_order) = @_;
4496: my @homeservers;
4497:
4498: my %servers = &get_servers($domain,'library');
4499: foreach my $tryserver (keys(%servers)) {
4500: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4501: push(@homeservers,$tryserver);
4502: }
4503: }
4504:
4505: my $response;
4506: foreach my $server (@homeservers) {
4507: $response=&reply('autoinstcodedefaults:'.$domain,$server);
4508: next if ($response =~ /(con_lost|error|no_such_host|refused)/);
4509:
4510: foreach my $pair (split(/\&/,$response)) {
4511: my ($name,$value)=split(/\=/,$pair);
4512: if ($name eq 'code_order') {
4513: @{$code_order} = split(/\&/,&unescape($value));
4514: } else {
4515: $returnhash->{&unescape($name)}=&unescape($value);
4516: }
4517: }
4518: return 'ok';
4519: }
4520:
4521: return $response;
4522: }
4523:
4524: sub auto_validate_class_sec {
4525: my ($cdom,$cnum,$owner,$inst_class) = @_;
4526: my $homeserver = &homeserver($cnum,$cdom);
4527: my $response=&reply('autovalidateclass_sec:'.$inst_class.':'.
4528: &escape($owner).':'.$cdom,$homeserver);
4529: return $response;
4530: }
4531:
4532: # ------------------------------------------------------- Course Group routines
4533:
4534: sub get_coursegroups {
4535: my ($cdom,$cnum,$group,$namespace) = @_;
4536: return(&dump($namespace,$cdom,$cnum,$group));
4537: }
4538:
4539: sub modify_coursegroup {
4540: my ($cdom,$cnum,$groupsettings) = @_;
4541: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
4542: }
4543:
4544: sub toggle_coursegroup_status {
4545: my ($cdom,$cnum,$group,$action) = @_;
4546: my ($from_namespace,$to_namespace);
4547: if ($action eq 'delete') {
4548: $from_namespace = 'coursegroups';
4549: $to_namespace = 'deleted_groups';
4550: } else {
4551: $from_namespace = 'deleted_groups';
4552: $to_namespace = 'coursegroups';
4553: }
4554: my %curr_group = &get_coursegroups($cdom,$cnum,$group,$from_namespace);
4555: if (my $tmp = &error(%curr_group)) {
4556: &Apache::lonnet::logthis('Error retrieving group: '.$tmp.' in '.$cnum.':'.$cdom);
4557: return ('read error',$tmp);
4558: } else {
4559: my %savedsettings = %curr_group;
4560: my $result = &put($to_namespace,\%savedsettings,$cdom,$cnum);
4561: my $deloutcome;
4562: if ($result eq 'ok') {
4563: $deloutcome = &del($from_namespace,[$group],$cdom,$cnum);
4564: } else {
4565: return ('write error',$result);
4566: }
4567: if ($deloutcome eq 'ok') {
4568: return 'ok';
4569: } else {
4570: return ('delete error',$deloutcome);
4571: }
4572: }
4573: }
4574:
4575: sub modify_group_roles {
4576: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
4577: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
4578: my $role = 'gr/'.&escape($userprivs);
4579: my ($uname,$udom) = split(/:/,$user);
4580: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
4581: if ($result eq 'ok') {
4582: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
4583: }
4584: return $result;
4585: }
4586:
4587: sub modify_coursegroup_membership {
4588: my ($cdom,$cnum,$membership) = @_;
4589: my $result = &put('groupmembership',$membership,$cdom,$cnum);
4590: return $result;
4591: }
4592:
4593: sub get_active_groups {
4594: my ($udom,$uname,$cdom,$cnum) = @_;
4595: my $now = time;
4596: my %groups = ();
4597: foreach my $key (keys(%env)) {
4598: if ($key =~ m-user\.role\.gr\./($match_domain)/($match_courseid)/(\w+)$-) {
4599: my ($start,$end) = split(/\./,$env{$key});
4600: if (($end!=0) && ($end<$now)) { next; }
4601: if (($start!=0) && ($start>$now)) { next; }
4602: if ($1 eq $cdom && $2 eq $cnum) {
4603: $groups{$3} = $env{$key} ;
4604: }
4605: }
4606: }
4607: return %groups;
4608: }
4609:
4610: sub get_group_membership {
4611: my ($cdom,$cnum,$group) = @_;
4612: return(&dump('groupmembership',$cdom,$cnum,$group));
4613: }
4614:
4615: sub get_users_groups {
4616: my ($udom,$uname,$courseid) = @_;
4617: my @usersgroups;
4618: my $cachetime=1800;
4619:
4620: my $hashid="$udom:$uname:$courseid";
4621: my ($grouplist,$cached)=&is_cached_new('getgroups',$hashid);
4622: if (defined($cached)) {
4623: @usersgroups = split(/:/,$grouplist);
4624: } else {
4625: $grouplist = '';
4626: my $courseurl = &courseid_to_courseurl($courseid);
4627: my %roleshash = &dump('roles',$udom,$uname,$courseurl);
4628: my $access_end = $env{'course.'.$courseid.
4629: '.default_enrollment_end_date'};
4630: my $now = time;
4631: foreach my $key (keys(%roleshash)) {
4632: if ($key =~ /^\Q$courseurl\E\/(\w+)\_gr$/) {
4633: my $group = $1;
4634: if ($roleshash{$key} =~ /_(\d+)_(\d+)$/) {
4635: my $start = $2;
4636: my $end = $1;
4637: if ($start == -1) { next; } # deleted from group
4638: if (($start!=0) && ($start>$now)) { next; }
4639: if (($end!=0) && ($end<$now)) {
4640: if ($access_end && $access_end < $now) {
4641: if ($access_end - $end < 86400) {
4642: push(@usersgroups,$group);
4643: }
4644: }
4645: next;
4646: }
4647: push(@usersgroups,$group);
4648: }
4649: }
4650: }
4651: @usersgroups = &sort_course_groups($courseid,@usersgroups);
4652: $grouplist = join(':',@usersgroups);
4653: &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
4654: }
4655: return @usersgroups;
4656: }
4657:
4658: sub devalidate_getgroups_cache {
4659: my ($udom,$uname,$cdom,$cnum)=@_;
4660: my $courseid = $cdom.'_'.$cnum;
4661:
4662: my $hashid="$udom:$uname:$courseid";
4663: &devalidate_cache_new('getgroups',$hashid);
4664: }
4665:
4666: # ------------------------------------------------------------------ Plain Text
4667:
4668: sub plaintext {
4669: my ($short,$type,$cid) = @_;
4670: if ($short =~ /^cr/) {
4671: return (split('/',$short))[-1];
4672: }
4673: if (!defined($cid)) {
4674: $cid = $env{'request.course.id'};
4675: }
4676: if (defined($cid) && defined($env{'course.'.$cid.'.'.$short.'.plaintext'})) {
4677: return &Apache::lonlocal::mt($env{'course.'.$cid.'.'.$short.
4678: '.plaintext'});
4679: }
4680: my %rolenames = (
4681: Course => 'std',
4682: Group => 'alt1',
4683: );
4684: if (defined($type) &&
4685: defined($rolenames{$type}) &&
4686: defined($prp{$short}{$rolenames{$type}})) {
4687: return &Apache::lonlocal::mt($prp{$short}{$rolenames{$type}});
4688: } else {
4689: return &Apache::lonlocal::mt($prp{$short}{'std'});
4690: }
4691: }
4692:
4693: # ----------------------------------------------------------------- Assign Role
4694:
4695: sub assignrole {
4696: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
4697: my $mrole;
4698: if ($role =~ /^cr\//) {
4699: my $cwosec=$url;
4700: $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
4701: unless (&allowed('ccr',$cwosec)) {
4702: &logthis('Refused custom assignrole: '.
4703: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4704: $env{'user.name'}.' at '.$env{'user.domain'});
4705: return 'refused';
4706: }
4707: $mrole='cr';
4708: } elsif ($role =~ /^gr\//) {
4709: my $cwogrp=$url;
4710: $cwogrp=~s{^/($match_domain)/($match_courseid)/.*}{$1/$2};
4711: unless (&allowed('mdg',$cwogrp)) {
4712: &logthis('Refused group assignrole: '.
4713: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4714: $env{'user.name'}.' at '.$env{'user.domain'});
4715: return 'refused';
4716: }
4717: $mrole='gr';
4718: } else {
4719: my $cwosec=$url;
4720: $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
4721: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
4722: &logthis('Refused assignrole: '.
4723: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4724: $env{'user.name'}.' at '.$env{'user.domain'});
4725: return 'refused';
4726: }
4727: $mrole=$role;
4728: }
4729: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4730: "$udom:$uname:$url".'_'."$mrole=$role";
4731: if ($end) { $command.='_'.$end; }
4732: if ($start) {
4733: if ($end) {
4734: $command.='_'.$start;
4735: } else {
4736: $command.='_0_'.$start;
4737: }
4738: }
4739: my $origstart = $start;
4740: my $origend = $end;
4741: # actually delete
4742: if ($deleteflag) {
4743: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
4744: # modify command to delete the role
4745: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
4746: "$udom:$uname:$url".'_'."$mrole";
4747: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
4748: # set start and finish to negative values for userrolelog
4749: $start=-1;
4750: $end=-1;
4751: }
4752: }
4753: # send command
4754: my $answer=&reply($command,&homeserver($uname,$udom));
4755: # log new user role if status is ok
4756: if ($answer eq 'ok') {
4757: &userrolelog($role,$uname,$udom,$url,$start,$end);
4758: # for course roles, perform group memberships changes triggered by role change.
4759: unless ($role =~ /^gr/) {
4760: &Apache::longroup::group_changes($udom,$uname,$url,$role,$origend,
4761: $origstart);
4762: }
4763: }
4764: return $answer;
4765: }
4766:
4767: # -------------------------------------------------- Modify user authentication
4768: # Overrides without validation
4769:
4770: sub modifyuserauth {
4771: my ($udom,$uname,$umode,$upass)=@_;
4772: my $uhome=&homeserver($uname,$udom);
4773: unless (&allowed('mau',$udom)) { return 'refused'; }
4774: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
4775: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4776: ' in domain '.$env{'request.role.domain'});
4777: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
4778: &escape($upass),$uhome);
4779: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
4780: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
4781: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4782: &log($udom,,$uname,$uhome,
4783: 'Authentication changed by '.$env{'user.domain'}.', '.
4784: $env{'user.name'}.', '.$umode.
4785: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4786: unless ($reply eq 'ok') {
4787: &logthis('Authentication mode error: '.$reply);
4788: return 'error: '.$reply;
4789: }
4790: return 'ok';
4791: }
4792:
4793: # --------------------------------------------------------------- Modify a user
4794:
4795: sub modifyuser {
4796: my ($udom, $uname, $uid,
4797: $umode, $upass, $first,
4798: $middle, $last, $gene,
4799: $forceid, $desiredhome, $email)=@_;
4800: $udom= &LONCAPA::clean_domain($udom);
4801: $uname=&LONCAPA::clean_username($uname);
4802: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
4803: $umode.', '.$first.', '.$middle.', '.
4804: $last.', '.$gene.'(forceid: '.$forceid.')'.
4805: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
4806: ' desiredhome not specified').
4807: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4808: ' in domain '.$env{'request.role.domain'});
4809: my $uhome=&homeserver($uname,$udom,'true');
4810: # ----------------------------------------------------------------- Create User
4811: if (($uhome eq 'no_host') &&
4812: (($umode && $upass) || ($umode eq 'localauth'))) {
4813: my $unhome='';
4814: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
4815: $unhome = $desiredhome;
4816: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
4817: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
4818: } else { # load balancing routine for determining $unhome
4819: my $loadm=10000000;
4820: my %servers = &get_servers($udom,'library');
4821: foreach my $tryserver (keys(%servers)) {
4822: my $answer=reply('load',$tryserver);
4823: if (($answer=~/\d+/) && ($answer<$loadm)) {
4824: $loadm=$answer;
4825: $unhome=$tryserver;
4826: }
4827: }
4828: }
4829: if (($unhome eq '') || ($unhome eq 'no_host')) {
4830: return 'error: unable to find a home server for '.$uname.
4831: ' in domain '.$udom;
4832: }
4833: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
4834: &escape($upass),$unhome);
4835: unless ($reply eq 'ok') {
4836: return 'error: '.$reply;
4837: }
4838: $uhome=&homeserver($uname,$udom,'true');
4839: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
4840: return 'error: unable verify users home machine.';
4841: }
4842: } # End of creation of new user
4843: # ---------------------------------------------------------------------- Add ID
4844: if ($uid) {
4845: $uid=~tr/A-Z/a-z/;
4846: my %uidhash=&idrget($udom,$uname);
4847: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
4848: && (!$forceid)) {
4849: unless ($uid eq $uidhash{$uname}) {
4850: return 'error: user id "'.$uid.'" does not match '.
4851: 'current user id "'.$uidhash{$uname}.'".';
4852: }
4853: } else {
4854: &idput($udom,($uname => $uid));
4855: }
4856: }
4857: # -------------------------------------------------------------- Add names, etc
4858: my @tmp=&get('environment',
4859: ['firstname','middlename','lastname','generation'],
4860: $udom,$uname);
4861: my %names;
4862: if ($tmp[0] =~ m/^error:.*/) {
4863: %names=();
4864: } else {
4865: %names = @tmp;
4866: }
4867: #
4868: # Make sure to not trash student environment if instructor does not bother
4869: # to supply name and email information
4870: #
4871: if ($first) { $names{'firstname'} = $first; }
4872: if (defined($middle)) { $names{'middlename'} = $middle; }
4873: if ($last) { $names{'lastname'} = $last; }
4874: if (defined($gene)) { $names{'generation'} = $gene; }
4875: if ($email) {
4876: $email=~s/[^\w\@\.\-\,]//gs;
4877: if ($email=~/\@/) { $names{'notification'} = $email;
4878: $names{'critnotification'} = $email;
4879: $names{'permanentemail'} = $email; }
4880: }
4881: my $reply = &put('environment', \%names, $udom,$uname);
4882: if ($reply ne 'ok') { return 'error: '.$reply; }
4883: &devalidate_cache_new('namescache',$uname.':'.$udom);
4884: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
4885: $umode.', '.$first.', '.$middle.', '.
4886: $last.', '.$gene.' by '.
4887: $env{'user.name'}.' at '.$env{'user.domain'});
4888: return 'ok';
4889: }
4890:
4891: # -------------------------------------------------------------- Modify student
4892:
4893: sub modifystudent {
4894: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
4895: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
4896: if (!$cid) {
4897: unless ($cid=$env{'request.course.id'}) {
4898: return 'not_in_class';
4899: }
4900: }
4901: # --------------------------------------------------------------- Make the user
4902: my $reply=&modifyuser
4903: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
4904: $desiredhome,$email);
4905: unless ($reply eq 'ok') { return $reply; }
4906: # This will cause &modify_student_enrollment to get the uid from the
4907: # students environment
4908: $uid = undef if (!$forceid);
4909: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
4910: $gene,$usec,$end,$start,$type,$locktype,$cid);
4911: return $reply;
4912: }
4913:
4914: sub modify_student_enrollment {
4915: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
4916: my ($cdom,$cnum,$chome);
4917: if (!$cid) {
4918: unless ($cid=$env{'request.course.id'}) {
4919: return 'not_in_class';
4920: }
4921: $cdom=$env{'course.'.$cid.'.domain'};
4922: $cnum=$env{'course.'.$cid.'.num'};
4923: } else {
4924: ($cdom,$cnum)=split(/_/,$cid);
4925: }
4926: $chome=$env{'course.'.$cid.'.home'};
4927: if (!$chome) {
4928: $chome=&homeserver($cnum,$cdom);
4929: }
4930: if (!$chome) { return 'unknown_course'; }
4931: # Make sure the user exists
4932: my $uhome=&homeserver($uname,$udom);
4933: if (($uhome eq '') || ($uhome eq 'no_host')) {
4934: return 'error: no such user';
4935: }
4936: # Get student data if we were not given enough information
4937: if (!defined($first) || $first eq '' ||
4938: !defined($last) || $last eq '' ||
4939: !defined($uid) || $uid eq '' ||
4940: !defined($middle) || $middle eq '' ||
4941: !defined($gene) || $gene eq '') {
4942: # They did not supply us with enough data to enroll the student, so
4943: # we need to pick up more information.
4944: my %tmp = &get('environment',
4945: ['firstname','middlename','lastname', 'generation','id']
4946: ,$udom,$uname);
4947:
4948: #foreach my $key (keys(%tmp)) {
4949: # &logthis("key $key = ".$tmp{$key});
4950: #}
4951: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
4952: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
4953: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
4954: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
4955: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
4956: }
4957: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
4958: my $reply=cput('classlist',
4959: {"$uname:$udom" =>
4960: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
4961: $cdom,$cnum);
4962: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
4963: return 'error: '.$reply;
4964: } else {
4965: &devalidate_getsection_cache($udom,$uname,$cid);
4966: }
4967: # Add student role to user
4968: my $uurl='/'.$cid;
4969: $uurl=~s/\_/\//g;
4970: if ($usec) {
4971: $uurl.='/'.$usec;
4972: }
4973: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
4974: }
4975:
4976: sub format_name {
4977: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
4978: my $name;
4979: if ($first ne 'lastname') {
4980: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
4981: } else {
4982: if ($lastname=~/\S/) {
4983: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
4984: $name=~s/\s+,/,/;
4985: } else {
4986: $name.= $firstname.' '.$middlename.' '.$generation;
4987: }
4988: }
4989: $name=~s/^\s+//;
4990: $name=~s/\s+$//;
4991: $name=~s/\s+/ /g;
4992: return $name;
4993: }
4994:
4995: # ------------------------------------------------- Write to course preferences
4996:
4997: sub writecoursepref {
4998: my ($courseid,%prefs)=@_;
4999: $courseid=~s/^\///;
5000: $courseid=~s/\_/\//g;
5001: my ($cdomain,$cnum)=split(/\//,$courseid);
5002: my $chome=homeserver($cnum,$cdomain);
5003: if (($chome eq '') || ($chome eq 'no_host')) {
5004: return 'error: no such course';
5005: }
5006: my $cstring='';
5007: foreach my $pref (keys(%prefs)) {
5008: $cstring.=&escape($pref).'='.&escape($prefs{$pref}).'&';
5009: }
5010: $cstring=~s/\&$//;
5011: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
5012: }
5013:
5014: # ---------------------------------------------------------- Make/modify course
5015:
5016: sub createcourse {
5017: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,
5018: $course_owner,$crstype)=@_;
5019: $url=&declutter($url);
5020: my $cid='';
5021: unless (&allowed('ccc',$udom)) {
5022: return 'refused';
5023: }
5024: # ------------------------------------------------------------------- Create ID
5025: my $uname=int(1+rand(9)).
5026: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
5027: substr($$.time,0,5).unpack("H8",pack("I32",time)).
5028: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
5029: # ----------------------------------------------- Make sure that does not exist
5030: my $uhome=&homeserver($uname,$udom,'true');
5031: unless (($uhome eq '') || ($uhome eq 'no_host')) {
5032: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
5033: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
5034: $uhome=&homeserver($uname,$udom,'true');
5035: unless (($uhome eq '') || ($uhome eq 'no_host')) {
5036: return 'error: unable to generate unique course-ID';
5037: }
5038: }
5039: # ------------------------------------------------ Check supplied server name
5040: $course_server = $env{'user.homeserver'} if (! defined($course_server));
5041: if (! exists($libserv{$course_server})) {
5042: return 'error:bad server name '.$course_server;
5043: }
5044: # ------------------------------------------------------------- Make the course
5045: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
5046: $course_server);
5047: unless ($reply eq 'ok') { return 'error: '.$reply; }
5048: $uhome=&homeserver($uname,$udom,'true');
5049: if (($uhome eq '') || ($uhome eq 'no_host')) {
5050: return 'error: no such course';
5051: }
5052: # ----------------------------------------------------------------- Course made
5053: # log existence
5054: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
5055: ':'.&escape($inst_code).':'.&escape($course_owner).':'.
5056: &escape($crstype),$uhome);
5057: &flushcourselogs();
5058: # set toplevel url
5059: my $topurl=$url;
5060: unless ($nonstandard) {
5061: # ------------------------------------------ For standard courses, make top url
5062: my $mapurl=&clutter($url);
5063: if ($mapurl eq '/res/') { $mapurl=''; }
5064: $env{'form.initmap'}=(<<ENDINITMAP);
5065: <map>
5066: <resource id="1" type="start"></resource>
5067: <resource id="2" src="$mapurl"></resource>
5068: <resource id="3" type="finish"></resource>
5069: <link index="1" from="1" to="2"></link>
5070: <link index="2" from="2" to="3"></link>
5071: </map>
5072: ENDINITMAP
5073: $topurl=&declutter(
5074: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
5075: );
5076: }
5077: # ----------------------------------------------------------- Write preferences
5078: &writecoursepref($udom.'_'.$uname,
5079: ('description' => $description,
5080: 'url' => $topurl));
5081: return '/'.$udom.'/'.$uname;
5082: }
5083:
5084: sub is_course {
5085: my ($cdom,$cnum) = @_;
5086: my %courses = &courseiddump($cdom,'.',1,'.','.',$cnum,undef,
5087: undef,'.');
5088: if (exists($courses{$cdom.'_'.$cnum})) {
5089: return 1;
5090: }
5091: return 0;
5092: }
5093:
5094: # ---------------------------------------------------------- Assign Custom Role
5095:
5096: sub assigncustomrole {
5097: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
5098: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
5099: $end,$start,$deleteflag);
5100: }
5101:
5102: # ----------------------------------------------------------------- Revoke Role
5103:
5104: sub revokerole {
5105: my ($udom,$uname,$url,$role,$deleteflag)=@_;
5106: my $now=time;
5107: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
5108: }
5109:
5110: # ---------------------------------------------------------- Revoke Custom Role
5111:
5112: sub revokecustomrole {
5113: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
5114: my $now=time;
5115: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
5116: $deleteflag);
5117: }
5118:
5119: # ------------------------------------------------------------ Disk usage
5120: sub diskusage {
5121: my ($udom,$uname,$directoryRoot)=@_;
5122: $directoryRoot =~ s/\/$//;
5123: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
5124: return $listing;
5125: }
5126:
5127: sub is_locked {
5128: my ($file_name, $domain, $user) = @_;
5129: my @check;
5130: my $is_locked;
5131: push @check, $file_name;
5132: my %locked = &get('file_permissions',\@check,
5133: $env{'user.domain'},$env{'user.name'});
5134: my ($tmp)=keys(%locked);
5135: if ($tmp=~/^error:/) { undef(%locked); }
5136:
5137: if (ref($locked{$file_name}) eq 'ARRAY') {
5138: $is_locked = 'false';
5139: foreach my $entry (@{$locked{$file_name}}) {
5140: if (ref($entry) eq 'ARRAY') {
5141: $is_locked = 'true';
5142: last;
5143: }
5144: }
5145: } else {
5146: $is_locked = 'false';
5147: }
5148: }
5149:
5150: sub declutter_portfile {
5151: my ($file) = @_;
5152: $file =~ s{^(/portfolio/|portfolio/)}{/};
5153: return $file;
5154: }
5155:
5156: # ------------------------------------------------------------- Mark as Read Only
5157:
5158: sub mark_as_readonly {
5159: my ($domain,$user,$files,$what) = @_;
5160: my %current_permissions = &dump('file_permissions',$domain,$user);
5161: my ($tmp)=keys(%current_permissions);
5162: if ($tmp=~/^error:/) { undef(%current_permissions); }
5163: foreach my $file (@{$files}) {
5164: $file = &declutter_portfile($file);
5165: push(@{$current_permissions{$file}},$what);
5166: }
5167: &put('file_permissions',\%current_permissions,$domain,$user);
5168: return;
5169: }
5170:
5171: # ------------------------------------------------------------Save Selected Files
5172:
5173: sub save_selected_files {
5174: my ($user, $path, @files) = @_;
5175: my $filename = $user."savedfiles";
5176: my @other_files = &files_not_in_path($user, $path);
5177: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5178: foreach my $file (@files) {
5179: print (OUT $env{'form.currentpath'}.$file."\n");
5180: }
5181: foreach my $file (@other_files) {
5182: print (OUT $file."\n");
5183: }
5184: close (OUT);
5185: return 'ok';
5186: }
5187:
5188: sub clear_selected_files {
5189: my ($user) = @_;
5190: my $filename = $user."savedfiles";
5191: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5192: print (OUT undef);
5193: close (OUT);
5194: return ("ok");
5195: }
5196:
5197: sub files_in_path {
5198: my ($user, $path) = @_;
5199: my $filename = $user."savedfiles";
5200: my %return_files;
5201: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5202: while (my $line_in = <IN>) {
5203: chomp ($line_in);
5204: my @paths_and_file = split (m!/!, $line_in);
5205: my $file_part = pop (@paths_and_file);
5206: my $path_part = join ('/', @paths_and_file);
5207: $path_part.='/';
5208: my $path_and_file = $path_part.$file_part;
5209: if ($path_part eq $path) {
5210: $return_files{$file_part}= 'selected';
5211: }
5212: }
5213: close (IN);
5214: return (\%return_files);
5215: }
5216:
5217: # called in portfolio select mode, to show files selected NOT in current directory
5218: sub files_not_in_path {
5219: my ($user, $path) = @_;
5220: my $filename = $user."savedfiles";
5221: my @return_files;
5222: my $path_part;
5223: open(IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5224: while (my $line = <IN>) {
5225: #ok, I know it's clunky, but I want it to work
5226: my @paths_and_file = split(m|/|, $line);
5227: my $file_part = pop(@paths_and_file);
5228: chomp($file_part);
5229: my $path_part = join('/', @paths_and_file);
5230: $path_part .= '/';
5231: my $path_and_file = $path_part.$file_part;
5232: if ($path_part ne $path) {
5233: push(@return_files, ($path_and_file));
5234: }
5235: }
5236: close(OUT);
5237: return (@return_files);
5238: }
5239:
5240: #----------------------------------------------Get portfolio file permissions
5241:
5242: sub get_portfile_permissions {
5243: my ($domain,$user) = @_;
5244: my %current_permissions = &dump('file_permissions',$domain,$user);
5245: my ($tmp)=keys(%current_permissions);
5246: if ($tmp=~/^error:/) { undef(%current_permissions); }
5247: return \%current_permissions;
5248: }
5249:
5250: #---------------------------------------------Get portfolio file access controls
5251:
5252: sub get_access_controls {
5253: my ($current_permissions,$group,$file) = @_;
5254: my %access;
5255: my $real_file = $file;
5256: $file =~ s/\.meta$//;
5257: if (defined($file)) {
5258: if (ref($$current_permissions{$file."\0".'accesscontrol'}) eq 'HASH') {
5259: foreach my $control (keys(%{$$current_permissions{$file."\0".'accesscontrol'}})) {
5260: $access{$real_file}{$control} = $$current_permissions{$file."\0".$control};
5261: }
5262: }
5263: } else {
5264: foreach my $key (keys(%{$current_permissions})) {
5265: if ($key =~ /\0accesscontrol$/) {
5266: if (defined($group)) {
5267: if ($key !~ m-^\Q$group\E/-) {
5268: next;
5269: }
5270: }
5271: my ($fullpath) = split(/\0/,$key);
5272: if (ref($$current_permissions{$key}) eq 'HASH') {
5273: foreach my $control (keys(%{$$current_permissions{$key}})) {
5274: $access{$fullpath}{$control}=$$current_permissions{$fullpath."\0".$control};
5275: }
5276: }
5277: }
5278: }
5279: }
5280: return %access;
5281: }
5282:
5283: sub modify_access_controls {
5284: my ($file_name,$changes,$domain,$user)=@_;
5285: my ($outcome,$deloutcome);
5286: my %store_permissions;
5287: my %new_values;
5288: my %new_control;
5289: my %translation;
5290: my @deletions = ();
5291: my $now = time;
5292: if (exists($$changes{'activate'})) {
5293: if (ref($$changes{'activate'}) eq 'HASH') {
5294: my @newitems = sort(keys(%{$$changes{'activate'}}));
5295: my $numnew = scalar(@newitems);
5296: for (my $i=0; $i<$numnew; $i++) {
5297: my $newkey = $newitems[$i];
5298: my $newid = &Apache::loncommon::get_cgi_id();
5299: if ($newkey =~ /^\d+:/) {
5300: $newkey =~ s/^(\d+)/$newid/;
5301: $translation{$1} = $newid;
5302: } elsif ($newkey =~ /^\d+_\d+_\d+:/) {
5303: $newkey =~ s/^(\d+_\d+_\d+)/$newid/;
5304: $translation{$1} = $newid;
5305: }
5306: $new_values{$file_name."\0".$newkey} =
5307: $$changes{'activate'}{$newitems[$i]};
5308: $new_control{$newkey} = $now;
5309: }
5310: }
5311: }
5312: my %todelete;
5313: my %changed_items;
5314: foreach my $action ('delete','update') {
5315: if (exists($$changes{$action})) {
5316: if (ref($$changes{$action}) eq 'HASH') {
5317: foreach my $key (keys(%{$$changes{$action}})) {
5318: my ($itemnum) = ($key =~ /^([^:]+):/);
5319: if ($action eq 'delete') {
5320: $todelete{$itemnum} = 1;
5321: } else {
5322: $changed_items{$itemnum} = $key;
5323: }
5324: }
5325: }
5326: }
5327: }
5328: # get lock on access controls for file.
5329: my $lockhash = {
5330: $file_name."\0".'locked_access_records' => $env{'user.name'}.
5331: ':'.$env{'user.domain'},
5332: };
5333: my $tries = 0;
5334: my $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5335:
5336: while (($gotlock ne 'ok') && $tries <3) {
5337: $tries ++;
5338: sleep 1;
5339: $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5340: }
5341: if ($gotlock eq 'ok') {
5342: my %curr_permissions = &dump('file_permissions',$domain,$user,$file_name);
5343: my ($tmp)=keys(%curr_permissions);
5344: if ($tmp=~/^error:/) { undef(%curr_permissions); }
5345: if (exists($curr_permissions{$file_name."\0".'accesscontrol'})) {
5346: my $curr_controls = $curr_permissions{$file_name."\0".'accesscontrol'};
5347: if (ref($curr_controls) eq 'HASH') {
5348: foreach my $control_item (keys(%{$curr_controls})) {
5349: my ($itemnum) = ($control_item =~ /^([^:]+):/);
5350: if (defined($todelete{$itemnum})) {
5351: push(@deletions,$file_name."\0".$control_item);
5352: } else {
5353: if (defined($changed_items{$itemnum})) {
5354: $new_control{$changed_items{$itemnum}} = $now;
5355: push(@deletions,$file_name."\0".$control_item);
5356: $new_values{$file_name."\0".$changed_items{$itemnum}} = $$changes{'update'}{$changed_items{$itemnum}};
5357: } else {
5358: $new_control{$control_item} = $$curr_controls{$control_item};
5359: }
5360: }
5361: }
5362: }
5363: }
5364: $deloutcome = &del('file_permissions',\@deletions,$domain,$user);
5365: $new_values{$file_name."\0".'accesscontrol'} = \%new_control;
5366: $outcome = &put('file_permissions',\%new_values,$domain,$user);
5367: # remove lock
5368: my @del_lock = ($file_name."\0".'locked_access_records');
5369: my $dellockoutcome = &del('file_permissions',\@del_lock,$domain,$user);
5370: my ($file,$group);
5371: if (&is_course($domain,$user)) {
5372: ($group,$file) = split(/\//,$file_name,2);
5373: } else {
5374: $file = $file_name;
5375: }
5376: my $sqlresult =
5377: &update_portfolio_table($user,$domain,$file,'portfolio_access',
5378: $group);
5379: } else {
5380: $outcome = "error: could not obtain lockfile\n";
5381: }
5382: return ($outcome,$deloutcome,\%new_values,\%translation);
5383: }
5384:
5385: sub make_public_indefinitely {
5386: my ($requrl) = @_;
5387: my $now = time;
5388: my $action = 'activate';
5389: my $aclnum = 0;
5390: if (&is_portfolio_url($requrl)) {
5391: my (undef,$udom,$unum,$file_name,$group) =
5392: &parse_portfolio_url($requrl);
5393: my $current_perms = &get_portfile_permissions($udom,$unum);
5394: my %access_controls = &get_access_controls($current_perms,
5395: $group,$file_name);
5396: foreach my $key (keys(%{$access_controls{$file_name}})) {
5397: my ($num,$scope,$end,$start) =
5398: ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
5399: if ($scope eq 'public') {
5400: if ($start <= $now && $end == 0) {
5401: $action = 'none';
5402: } else {
5403: $action = 'update';
5404: $aclnum = $num;
5405: }
5406: last;
5407: }
5408: }
5409: if ($action eq 'none') {
5410: return 'ok';
5411: } else {
5412: my %changes;
5413: my $newend = 0;
5414: my $newstart = $now;
5415: my $newkey = $aclnum.':public_'.$newend.'_'.$newstart;
5416: $changes{$action}{$newkey} = {
5417: type => 'public',
5418: time => {
5419: start => $newstart,
5420: end => $newend,
5421: },
5422: };
5423: my ($outcome,$deloutcome,$new_values,$translation) =
5424: &modify_access_controls($file_name,\%changes,$udom,$unum);
5425: return $outcome;
5426: }
5427: } else {
5428: return 'invalid';
5429: }
5430: }
5431:
5432: #------------------------------------------------------Get Marked as Read Only
5433:
5434: sub get_marked_as_readonly {
5435: my ($domain,$user,$what,$group) = @_;
5436: my $current_permissions = &get_portfile_permissions($domain,$user);
5437: my @readonly_files;
5438: my $cmp1=$what;
5439: if (ref($what)) { $cmp1=join('',@{$what}) };
5440: while (my ($file_name,$value) = each(%{$current_permissions})) {
5441: if (defined($group)) {
5442: if ($file_name !~ m-^\Q$group\E/-) {
5443: next;
5444: }
5445: }
5446: if (ref($value) eq "ARRAY"){
5447: foreach my $stored_what (@{$value}) {
5448: my $cmp2=$stored_what;
5449: if (ref($stored_what) eq 'ARRAY') {
5450: $cmp2=join('',@{$stored_what});
5451: }
5452: if ($cmp1 eq $cmp2) {
5453: push(@readonly_files, $file_name);
5454: last;
5455: } elsif (!defined($what)) {
5456: push(@readonly_files, $file_name);
5457: last;
5458: }
5459: }
5460: }
5461: }
5462: return @readonly_files;
5463: }
5464: #-----------------------------------------------------------Get Marked as Read Only Hash
5465:
5466: sub get_marked_as_readonly_hash {
5467: my ($current_permissions,$group,$what) = @_;
5468: my %readonly_files;
5469: while (my ($file_name,$value) = each(%{$current_permissions})) {
5470: if (defined($group)) {
5471: if ($file_name !~ m-^\Q$group\E/-) {
5472: next;
5473: }
5474: }
5475: if (ref($value) eq "ARRAY"){
5476: foreach my $stored_what (@{$value}) {
5477: if (ref($stored_what) eq 'ARRAY') {
5478: foreach my $lock_descriptor(@{$stored_what}) {
5479: if ($lock_descriptor eq 'graded') {
5480: $readonly_files{$file_name} = 'graded';
5481: } elsif ($lock_descriptor eq 'handback') {
5482: $readonly_files{$file_name} = 'handback';
5483: } else {
5484: if (!exists($readonly_files{$file_name})) {
5485: $readonly_files{$file_name} = 'locked';
5486: }
5487: }
5488: }
5489: }
5490: }
5491: }
5492: }
5493: return %readonly_files;
5494: }
5495: # ------------------------------------------------------------ Unmark as Read Only
5496:
5497: sub unmark_as_readonly {
5498: # unmarks $file_name (if $file_name is defined), or all files locked by $what
5499: # for portfolio submissions, $what contains [$symb,$crsid]
5500: my ($domain,$user,$what,$file_name,$group) = @_;
5501: $file_name = &declutter_portfile($file_name);
5502: my $symb_crs = $what;
5503: if (ref($what)) { $symb_crs=join('',@$what); }
5504: my %current_permissions = &dump('file_permissions',$domain,$user,$group);
5505: my ($tmp)=keys(%current_permissions);
5506: if ($tmp=~/^error:/) { undef(%current_permissions); }
5507: my @readonly_files = &get_marked_as_readonly($domain,$user,$what,$group);
5508: foreach my $file (@readonly_files) {
5509: my $clean_file = &declutter_portfile($file);
5510: if (defined($file_name) && ($file_name ne $clean_file)) { next; }
5511: my $current_locks = $current_permissions{$file};
5512: my @new_locks;
5513: my @del_keys;
5514: if (ref($current_locks) eq "ARRAY"){
5515: foreach my $locker (@{$current_locks}) {
5516: my $compare=$locker;
5517: if (ref($locker) eq 'ARRAY') {
5518: $compare=join('',@{$locker});
5519: if ($compare ne $symb_crs) {
5520: push(@new_locks, $locker);
5521: }
5522: }
5523: }
5524: if (scalar(@new_locks) > 0) {
5525: $current_permissions{$file} = \@new_locks;
5526: } else {
5527: push(@del_keys, $file);
5528: &del('file_permissions',\@del_keys, $domain, $user);
5529: delete($current_permissions{$file});
5530: }
5531: }
5532: }
5533: &put('file_permissions',\%current_permissions,$domain,$user);
5534: return;
5535: }
5536:
5537: # ------------------------------------------------------------ Directory lister
5538:
5539: sub dirlist {
5540: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
5541:
5542: $uri=~s/^\///;
5543: $uri=~s/\/$//;
5544: my ($udom, $uname);
5545: (undef,$udom,$uname)=split(/\//,$uri);
5546: if(defined($userdomain)) {
5547: $udom = $userdomain;
5548: }
5549: if(defined($username)) {
5550: $uname = $username;
5551: }
5552:
5553: my $dirRoot = $perlvar{'lonDocRoot'};
5554: if(defined($alternateDirectoryRoot)) {
5555: $dirRoot = $alternateDirectoryRoot;
5556: $dirRoot =~ s/\/$//;
5557: }
5558:
5559: if($udom) {
5560: if($uname) {
5561: my $listing = &reply('ls2:'.$dirRoot.'/'.$uri,
5562: &homeserver($uname,$udom));
5563: my @listing_results;
5564: if ($listing eq 'unknown_cmd') {
5565: $listing = &reply('ls:'.$dirRoot.'/'.$uri,
5566: &homeserver($uname,$udom));
5567: @listing_results = split(/:/,$listing);
5568: } else {
5569: @listing_results = map { &unescape($_); } split(/:/,$listing);
5570: }
5571: return @listing_results;
5572: } elsif(!defined($alternateDirectoryRoot)) {
5573: my %allusers;
5574: my %servers = &get_servers($udom,'library');
5575: foreach my $tryserver (keys(%servers)) {
5576: my $listing = &reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
5577: $udom, $tryserver);
5578: my @listing_results;
5579: if ($listing eq 'unknown_cmd') {
5580: $listing = &reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
5581: $udom, $tryserver);
5582: @listing_results = split(/:/,$listing);
5583: } else {
5584: @listing_results =
5585: map { &unescape($_); } split(/:/,$listing);
5586: }
5587: if ($listing_results[0] ne 'no_such_dir' &&
5588: $listing_results[0] ne 'empty' &&
5589: $listing_results[0] ne 'con_lost') {
5590: foreach my $line (@listing_results) {
5591: my ($entry) = split(/&/,$line,2);
5592: $allusers{$entry} = 1;
5593: }
5594: }
5595: }
5596: my $alluserstr='';
5597: foreach my $user (sort(keys(%allusers))) {
5598: $alluserstr.=$user.'&user:';
5599: }
5600: $alluserstr=~s/:$//;
5601: return split(/:/,$alluserstr);
5602: } else {
5603: return ('missing user name');
5604: }
5605: } elsif(!defined($alternateDirectoryRoot)) {
5606: my @all_domains = sort(&all_domains());
5607: foreach my $domain (@all_domains) {
5608: $domain = $perlvar{'lonDocRoot'}.'/res/'.$domain.'/&domain';
5609: }
5610: return @all_domains;
5611: } else {
5612: return ('missing domain');
5613: }
5614: }
5615:
5616: # --------------------------------------------- GetFileTimestamp
5617: # This function utilizes dirlist and returns the date stamp for
5618: # when it was last modified. It will also return an error of -1
5619: # if an error occurs
5620:
5621: ##
5622: ## FIXME: This subroutine assumes its caller knows something about the
5623: ## directory structure of the home server for the student ($root).
5624: ## Not a good assumption to make. Since this is for looking up files
5625: ## in user directories, the full path should be constructed by lond, not
5626: ## whatever machine we request data from.
5627: ##
5628: sub GetFileTimestamp {
5629: my ($studentDomain,$studentName,$filename,$root)=@_;
5630: $studentDomain = &LONCAPA::clean_domain($studentDomain);
5631: $studentName = &LONCAPA::clean_username($studentName);
5632: my $subdir=$studentName.'__';
5633: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
5634: my $proname="$studentDomain/$subdir/$studentName";
5635: $proname .= '/'.$filename;
5636: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
5637: $studentName, $root);
5638: my @stats = split('&', $fileStat);
5639: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5640: # @stats contains first the filename, then the stat output
5641: return $stats[10]; # so this is 10 instead of 9.
5642: } else {
5643: return -1;
5644: }
5645: }
5646:
5647: sub stat_file {
5648: my ($uri) = @_;
5649: $uri = &clutter_with_no_wrapper($uri);
5650:
5651: my ($udom,$uname,$file,$dir);
5652: if ($uri =~ m-^/(uploaded|editupload)/-) {
5653: ($udom,$uname,$file) =
5654: ($uri =~ m-/(?:uploaded|editupload)/?($match_domain)/?($match_name)/?(.*)-);
5655: $file = 'userfiles/'.$file;
5656: $dir = &propath($udom,$uname);
5657: }
5658: if ($uri =~ m-^/res/-) {
5659: ($udom,$uname) =
5660: ($uri =~ m-/(?:res)/?($match_domain)/?($match_username)/-);
5661: $file = $uri;
5662: }
5663:
5664: if (!$udom || !$uname || !$file) {
5665: # unable to handle the uri
5666: return ();
5667: }
5668:
5669: my ($result) = &dirlist($file,$udom,$uname,$dir);
5670: my @stats = split('&', $result);
5671:
5672: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5673: shift(@stats); #filename is first
5674: return @stats;
5675: }
5676: return ();
5677: }
5678:
5679: # -------------------------------------------------------- Value of a Condition
5680:
5681: # gets the value of a specific preevaluated condition
5682: # stored in the string $env{user.state.<cid>}
5683: # or looks up a condition reference in the bighash and if if hasn't
5684: # already been evaluated recurses into docondval to get the value of
5685: # the condition, then memoizing it to
5686: # $env{user.state.<cid>.<condition>}
5687: sub directcondval {
5688: my $number=shift;
5689: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
5690: &Apache::lonuserstate::evalstate();
5691: }
5692: if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
5693: return $env{'user.state.'.$env{'request.course.id'}.".$number"};
5694: } elsif ($number =~ /^_/) {
5695: my $sub_condition;
5696: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5697: &GDBM_READER(),0640)) {
5698: $sub_condition=$bighash{'conditions'.$number};
5699: untie(%bighash);
5700: }
5701: my $value = &docondval($sub_condition);
5702: &appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
5703: return $value;
5704: }
5705: if ($env{'user.state.'.$env{'request.course.id'}}) {
5706: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
5707: } else {
5708: return 2;
5709: }
5710: }
5711:
5712: # get the collection of conditions for this resource
5713: sub condval {
5714: my $condidx=shift;
5715: my $allpathcond='';
5716: foreach my $cond (split(/\|/,$condidx)) {
5717: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
5718: $allpathcond.=
5719: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
5720: }
5721: }
5722: $allpathcond=~s/\|$//;
5723: return &docondval($allpathcond);
5724: }
5725:
5726: #evaluates an expression of conditions
5727: sub docondval {
5728: my ($allpathcond) = @_;
5729: my $result=0;
5730: if ($env{'request.course.id'}
5731: && defined($allpathcond)) {
5732: my $operand='|';
5733: my @stack;
5734: foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
5735: if ($chunk eq '(') {
5736: push @stack,($operand,$result);
5737: } elsif ($chunk eq ')') {
5738: my $before=pop @stack;
5739: if (pop @stack eq '&') {
5740: $result=$result>$before?$before:$result;
5741: } else {
5742: $result=$result>$before?$result:$before;
5743: }
5744: } elsif (($chunk eq '&') || ($chunk eq '|')) {
5745: $operand=$chunk;
5746: } else {
5747: my $new=directcondval($chunk);
5748: if ($operand eq '&') {
5749: $result=$result>$new?$new:$result;
5750: } else {
5751: $result=$result>$new?$result:$new;
5752: }
5753: }
5754: }
5755: }
5756: return $result;
5757: }
5758:
5759: # ---------------------------------------------------- Devalidate courseresdata
5760:
5761: sub devalidatecourseresdata {
5762: my ($coursenum,$coursedomain)=@_;
5763: my $hashid=$coursenum.':'.$coursedomain;
5764: &devalidate_cache_new('courseres',$hashid);
5765: }
5766:
5767:
5768: # --------------------------------------------------- Course Resourcedata Query
5769:
5770: sub get_courseresdata {
5771: my ($coursenum,$coursedomain)=@_;
5772: my $coursehom=&homeserver($coursenum,$coursedomain);
5773: my $hashid=$coursenum.':'.$coursedomain;
5774: my ($result,$cached)=&is_cached_new('courseres',$hashid);
5775: my %dumpreply;
5776: unless (defined($cached)) {
5777: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
5778: $result=\%dumpreply;
5779: my ($tmp) = keys(%dumpreply);
5780: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
5781: &do_cache_new('courseres',$hashid,$result,600);
5782: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
5783: return $tmp;
5784: } elsif ($tmp =~ /^(error)/) {
5785: $result=undef;
5786: &do_cache_new('courseres',$hashid,$result,600);
5787: }
5788: }
5789: return $result;
5790: }
5791:
5792: sub devalidateuserresdata {
5793: my ($uname,$udom)=@_;
5794: my $hashid="$udom:$uname";
5795: &devalidate_cache_new('userres',$hashid);
5796: }
5797:
5798: sub get_userresdata {
5799: my ($uname,$udom)=@_;
5800: #most student don\'t have any data set, check if there is some data
5801: if (&EXT_cache_status($udom,$uname)) { return undef; }
5802:
5803: my $hashid="$udom:$uname";
5804: my ($result,$cached)=&is_cached_new('userres',$hashid);
5805: if (!defined($cached)) {
5806: my %resourcedata=&dump('resourcedata',$udom,$uname);
5807: $result=\%resourcedata;
5808: &do_cache_new('userres',$hashid,$result,600);
5809: }
5810: my ($tmp)=keys(%$result);
5811: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
5812: return $result;
5813: }
5814: #error 2 occurs when the .db doesn't exist
5815: if ($tmp!~/error: 2 /) {
5816: &logthis("<font color=\"blue\">WARNING:".
5817: " Trying to get resource data for ".
5818: $uname." at ".$udom.": ".
5819: $tmp."</font>");
5820: } elsif ($tmp=~/error: 2 /) {
5821: #&EXT_cache_set($udom,$uname);
5822: &do_cache_new('userres',$hashid,undef,600);
5823: undef($tmp); # not really an error so don't send it back
5824: }
5825: return $tmp;
5826: }
5827:
5828: sub resdata {
5829: my ($name,$domain,$type,@which)=@_;
5830: my $result;
5831: if ($type eq 'course') {
5832: $result=&get_courseresdata($name,$domain);
5833: } elsif ($type eq 'user') {
5834: $result=&get_userresdata($name,$domain);
5835: }
5836: if (!ref($result)) { return $result; }
5837: foreach my $item (@which) {
5838: if (defined($result->{$item})) {
5839: return $result->{$item};
5840: }
5841: }
5842: return undef;
5843: }
5844:
5845: #
5846: # EXT resource caching routines
5847: #
5848:
5849: sub clear_EXT_cache_status {
5850: &delenv('cache.EXT.');
5851: }
5852:
5853: sub EXT_cache_status {
5854: my ($target_domain,$target_user) = @_;
5855: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5856: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
5857: # We know already the user has no data
5858: return 1;
5859: } else {
5860: return 0;
5861: }
5862: }
5863:
5864: sub EXT_cache_set {
5865: my ($target_domain,$target_user) = @_;
5866: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5867: #&appenv($cachename => time);
5868: }
5869:
5870: # --------------------------------------------------------- Value of a Variable
5871: sub EXT {
5872:
5873: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
5874: unless ($varname) { return ''; }
5875: #get real user name/domain, courseid and symb
5876: my $courseid;
5877: my $publicuser;
5878: if ($symbparm) {
5879: $symbparm=&get_symb_from_alias($symbparm);
5880: }
5881: if (!($uname && $udom)) {
5882: (my $cursymb,$courseid,$udom,$uname,$publicuser)= &whichuser($symbparm);
5883: if (!$symbparm) { $symbparm=$cursymb; }
5884: } else {
5885: $courseid=$env{'request.course.id'};
5886: }
5887: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
5888: my $rest;
5889: if (defined($therest[0])) {
5890: $rest=join('.',@therest);
5891: } else {
5892: $rest='';
5893: }
5894:
5895: my $qualifierrest=$qualifier;
5896: if ($rest) { $qualifierrest.='.'.$rest; }
5897: my $spacequalifierrest=$space;
5898: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
5899: if ($realm eq 'user') {
5900: # --------------------------------------------------------------- user.resource
5901: if ($space eq 'resource') {
5902: if ( (defined($Apache::lonhomework::parsing_a_problem)
5903: || defined($Apache::lonhomework::parsing_a_task))
5904: &&
5905: ($symbparm eq &symbread()) ) {
5906: # if we are in the middle of processing the resource the
5907: # get the value we are planning on committing
5908: if (defined($Apache::lonhomework::results{$qualifierrest})) {
5909: return $Apache::lonhomework::results{$qualifierrest};
5910: } else {
5911: return $Apache::lonhomework::history{$qualifierrest};
5912: }
5913: } else {
5914: my %restored;
5915: if ($publicuser || $env{'request.state'} eq 'construct') {
5916: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
5917: } else {
5918: %restored=&restore($symbparm,$courseid,$udom,$uname);
5919: }
5920: return $restored{$qualifierrest};
5921: }
5922: # ----------------------------------------------------------------- user.access
5923: } elsif ($space eq 'access') {
5924: # FIXME - not supporting calls for a specific user
5925: return &allowed($qualifier,$rest);
5926: # ------------------------------------------ user.preferences, user.environment
5927: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
5928: if (($uname eq $env{'user.name'}) &&
5929: ($udom eq $env{'user.domain'})) {
5930: return $env{join('.',('environment',$qualifierrest))};
5931: } else {
5932: my %returnhash;
5933: if (!$publicuser) {
5934: %returnhash=&userenvironment($udom,$uname,
5935: $qualifierrest);
5936: }
5937: return $returnhash{$qualifierrest};
5938: }
5939: # ----------------------------------------------------------------- user.course
5940: } elsif ($space eq 'course') {
5941: # FIXME - not supporting calls for a specific user
5942: return $env{join('.',('request.course',$qualifier))};
5943: # ------------------------------------------------------------------- user.role
5944: } elsif ($space eq 'role') {
5945: # FIXME - not supporting calls for a specific user
5946: my ($role,$where)=split(/\./,$env{'request.role'});
5947: if ($qualifier eq 'value') {
5948: return $role;
5949: } elsif ($qualifier eq 'extent') {
5950: return $where;
5951: }
5952: # ----------------------------------------------------------------- user.domain
5953: } elsif ($space eq 'domain') {
5954: return $udom;
5955: # ------------------------------------------------------------------- user.name
5956: } elsif ($space eq 'name') {
5957: return $uname;
5958: # ---------------------------------------------------- Any other user namespace
5959: } else {
5960: my %reply;
5961: if (!$publicuser) {
5962: %reply=&get($space,[$qualifierrest],$udom,$uname);
5963: }
5964: return $reply{$qualifierrest};
5965: }
5966: } elsif ($realm eq 'query') {
5967: # ---------------------------------------------- pull stuff out of query string
5968: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
5969: [$spacequalifierrest]);
5970: return $env{'form.'.$spacequalifierrest};
5971: } elsif ($realm eq 'request') {
5972: # ------------------------------------------------------------- request.browser
5973: if ($space eq 'browser') {
5974: if ($qualifier eq 'textremote') {
5975: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
5976: return 1;
5977: } else {
5978: return 0;
5979: }
5980: } else {
5981: return $env{'browser.'.$qualifier};
5982: }
5983: # ------------------------------------------------------------ request.filename
5984: } else {
5985: return $env{'request.'.$spacequalifierrest};
5986: }
5987: } elsif ($realm eq 'course') {
5988: # ---------------------------------------------------------- course.description
5989: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
5990: } elsif ($realm eq 'resource') {
5991:
5992: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
5993: if (!$symbparm) { $symbparm=&symbread(); }
5994: }
5995:
5996: if ($space eq 'title') {
5997: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
5998: return &gettitle($symbparm);
5999: }
6000:
6001: if ($space eq 'map') {
6002: my ($map) = &decode_symb($symbparm);
6003: return &symbread($map);
6004: }
6005:
6006: my ($section, $group, @groups);
6007: my ($courselevelm,$courselevel);
6008: if ($symbparm && defined($courseid) &&
6009: $courseid eq $env{'request.course.id'}) {
6010:
6011: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
6012:
6013: # ----------------------------------------------------- Cascading lookup scheme
6014: my $symbp=$symbparm;
6015: my $mapp=&deversion((&decode_symb($symbp))[0]);
6016:
6017: my $symbparm=$symbp.'.'.$spacequalifierrest;
6018: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
6019:
6020: if (($env{'user.name'} eq $uname) &&
6021: ($env{'user.domain'} eq $udom)) {
6022: $section=$env{'request.course.sec'};
6023: @groups = split(/:/,$env{'request.course.groups'});
6024: @groups=&sort_course_groups($courseid,@groups);
6025: } else {
6026: if (! defined($usection)) {
6027: $section=&getsection($udom,$uname,$courseid);
6028: } else {
6029: $section = $usection;
6030: }
6031: @groups = &get_users_groups($udom,$uname,$courseid);
6032: }
6033:
6034: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
6035: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
6036: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
6037:
6038: $courselevel=$courseid.'.'.$spacequalifierrest;
6039: my $courselevelr=$courseid.'.'.$symbparm;
6040: $courselevelm=$courseid.'.'.$mapparm;
6041:
6042: # ----------------------------------------------------------- first, check user
6043:
6044: my $userreply=&resdata($uname,$udom,'user',
6045: ($courselevelr,$courselevelm,
6046: $courselevel));
6047: if (defined($userreply)) { return $userreply; }
6048:
6049: # ------------------------------------------------ second, check some of course
6050: my $coursereply;
6051: if (@groups > 0) {
6052: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
6053: $mapparm,$spacequalifierrest);
6054: if (defined($coursereply)) { return $coursereply; }
6055: }
6056:
6057: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
6058: $env{'course.'.$courseid.'.domain'},
6059: 'course',
6060: ($seclevelr,$seclevelm,$seclevel,
6061: $courselevelr));
6062: if (defined($coursereply)) { return $coursereply; }
6063:
6064: # ------------------------------------------------------ third, check map parms
6065: my %parmhash=();
6066: my $thisparm='';
6067: if (tie(%parmhash,'GDBM_File',
6068: $env{'request.course.fn'}.'_parms.db',
6069: &GDBM_READER(),0640)) {
6070: $thisparm=$parmhash{$symbparm};
6071: untie(%parmhash);
6072: }
6073: if ($thisparm) { return $thisparm; }
6074: }
6075: # ------------------------------------------ fourth, look in resource metadata
6076:
6077: $spacequalifierrest=~s/\./\_/;
6078: my $filename;
6079: if (!$symbparm) { $symbparm=&symbread(); }
6080: if ($symbparm) {
6081: $filename=(&decode_symb($symbparm))[2];
6082: } else {
6083: $filename=$env{'request.filename'};
6084: }
6085: my $metadata=&metadata($filename,$spacequalifierrest);
6086: if (defined($metadata)) { return $metadata; }
6087: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
6088: if (defined($metadata)) { return $metadata; }
6089:
6090: # ---------------------------------------------- fourth, look in rest pf course
6091: if ($symbparm && defined($courseid) &&
6092: $courseid eq $env{'request.course.id'}) {
6093: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
6094: $env{'course.'.$courseid.'.domain'},
6095: 'course',
6096: ($courselevelm,$courselevel));
6097: if (defined($coursereply)) { return $coursereply; }
6098: }
6099: # ------------------------------------------------------------------ Cascade up
6100: unless ($space eq '0') {
6101: my @parts=split(/_/,$space);
6102: my $id=pop(@parts);
6103: my $part=join('_',@parts);
6104: if ($part eq '') { $part='0'; }
6105: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
6106: $symbparm,$udom,$uname,$section,1);
6107: if (defined($partgeneral)) { return $partgeneral; }
6108: }
6109: if ($recurse) { return undef; }
6110: my $pack_def=&packages_tab_default($filename,$varname);
6111: if (defined($pack_def)) { return $pack_def; }
6112:
6113: # ---------------------------------------------------- Any other user namespace
6114: } elsif ($realm eq 'environment') {
6115: # ----------------------------------------------------------------- environment
6116: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
6117: return $env{'environment.'.$spacequalifierrest};
6118: } else {
6119: if ($uname eq 'anonymous' && $udom eq '') {
6120: return '';
6121: }
6122: my %returnhash=&userenvironment($udom,$uname,
6123: $spacequalifierrest);
6124: return $returnhash{$spacequalifierrest};
6125: }
6126: } elsif ($realm eq 'system') {
6127: # ----------------------------------------------------------------- system.time
6128: if ($space eq 'time') {
6129: return time;
6130: }
6131: } elsif ($realm eq 'server') {
6132: # ----------------------------------------------------------------- system.time
6133: if ($space eq 'name') {
6134: return $ENV{'SERVER_NAME'};
6135: }
6136: }
6137: return '';
6138: }
6139:
6140: sub check_group_parms {
6141: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
6142: my @groupitems = ();
6143: my $resultitem;
6144: my @levels = ($symbparm,$mapparm,$what);
6145: foreach my $group (@{$groups}) {
6146: foreach my $level (@levels) {
6147: my $item = $courseid.'.['.$group.'].'.$level;
6148: push(@groupitems,$item);
6149: }
6150: }
6151: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
6152: $env{'course.'.$courseid.'.domain'},
6153: 'course',@groupitems);
6154: return $coursereply;
6155: }
6156:
6157: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
6158: my ($courseid,@groups) = @_;
6159: @groups = sort(@groups);
6160: return @groups;
6161: }
6162:
6163: sub packages_tab_default {
6164: my ($uri,$varname)=@_;
6165: my (undef,$part,$name)=split(/\./,$varname);
6166:
6167: my (@extension,@specifics,$do_default);
6168: foreach my $package (split(/,/,&metadata($uri,'packages'))) {
6169: my ($pack_type,$pack_part)=split(/_/,$package,2);
6170: if ($pack_type eq 'default') {
6171: $do_default=1;
6172: } elsif ($pack_type eq 'extension') {
6173: push(@extension,[$package,$pack_type,$pack_part]);
6174: } else {
6175: push(@specifics,[$package,$pack_type,$pack_part]);
6176: }
6177: }
6178: # first look for a package that matches the requested part id
6179: foreach my $package (@specifics) {
6180: my (undef,$pack_type,$pack_part)=@{$package};
6181: next if ($pack_part ne $part);
6182: if (defined($packagetab{"$pack_type&$name&default"})) {
6183: return $packagetab{"$pack_type&$name&default"};
6184: }
6185: }
6186: # look for any possible matching non extension_ package
6187: foreach my $package (@specifics) {
6188: my (undef,$pack_type,$pack_part)=@{$package};
6189: if (defined($packagetab{"$pack_type&$name&default"})) {
6190: return $packagetab{"$pack_type&$name&default"};
6191: }
6192: if ($pack_type eq 'part') { $pack_part='0'; }
6193: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
6194: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
6195: }
6196: }
6197: # look for any posible extension_ match
6198: foreach my $package (@extension) {
6199: my ($package,$pack_type)=@{$package};
6200: if (defined($packagetab{"$pack_type&$name&default"})) {
6201: return $packagetab{"$pack_type&$name&default"};
6202: }
6203: if (defined($packagetab{$package."&$name&default"})) {
6204: return $packagetab{$package."&$name&default"};
6205: }
6206: }
6207: # look for a global default setting
6208: if ($do_default && defined($packagetab{"default&$name&default"})) {
6209: return $packagetab{"default&$name&default"};
6210: }
6211: return undef;
6212: }
6213:
6214: sub add_prefix_and_part {
6215: my ($prefix,$part)=@_;
6216: my $keyroot;
6217: if (defined($prefix) && $prefix !~ /^__/) {
6218: # prefix that has a part already
6219: $keyroot=$prefix;
6220: } elsif (defined($prefix)) {
6221: # prefix that is missing a part
6222: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
6223: } else {
6224: # no prefix at all
6225: if (defined($part)) { $keyroot='_'.$part; }
6226: }
6227: return $keyroot;
6228: }
6229:
6230: # ---------------------------------------------------------------- Get metadata
6231:
6232: my %metaentry;
6233: sub metadata {
6234: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
6235: $uri=&declutter($uri);
6236: # if it is a non metadata possible uri return quickly
6237: if (($uri eq '') ||
6238: (($uri =~ m|^/*adm/|) &&
6239: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
6240: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
6241: ($uri =~ m|home/$match_username/public_html/|)) {
6242: return undef;
6243: }
6244: my $filename=$uri;
6245: $uri=~s/\.meta$//;
6246: #
6247: # Is the metadata already cached?
6248: # Look at timestamp of caching
6249: # Everything is cached by the main uri, libraries are never directly cached
6250: #
6251: if (!defined($liburi)) {
6252: my ($result,$cached)=&is_cached_new('meta',$uri);
6253: if (defined($cached)) { return $result->{':'.$what}; }
6254: }
6255: {
6256: #
6257: # Is this a recursive call for a library?
6258: #
6259: # if (! exists($metacache{$uri})) {
6260: # $metacache{$uri}={};
6261: # }
6262: if ($liburi) {
6263: $liburi=&declutter($liburi);
6264: $filename=$liburi;
6265: } else {
6266: &devalidate_cache_new('meta',$uri);
6267: undef(%metaentry);
6268: }
6269: my %metathesekeys=();
6270: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
6271: my $metastring;
6272: if ($uri !~ m -^(editupload)/-) {
6273: my $file=&filelocation('',&clutter($filename));
6274: #push(@{$metaentry{$uri.'.file'}},$file);
6275: $metastring=&getfile($file);
6276: }
6277: my $parser=HTML::LCParser->new(\$metastring);
6278: my $token;
6279: undef %metathesekeys;
6280: while ($token=$parser->get_token) {
6281: if ($token->[0] eq 'S') {
6282: if (defined($token->[2]->{'package'})) {
6283: #
6284: # This is a package - get package info
6285: #
6286: my $package=$token->[2]->{'package'};
6287: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6288: if (defined($token->[2]->{'id'})) {
6289: $keyroot.='_'.$token->[2]->{'id'};
6290: }
6291: if ($metaentry{':packages'}) {
6292: $metaentry{':packages'}.=','.$package.$keyroot;
6293: } else {
6294: $metaentry{':packages'}=$package.$keyroot;
6295: }
6296: foreach my $pack_entry (keys(%packagetab)) {
6297: my $part=$keyroot;
6298: $part=~s/^\_//;
6299: if ($pack_entry=~/^\Q$package\E\&/ ||
6300: $pack_entry=~/^\Q$package\E_0\&/) {
6301: my ($pack,$name,$subp)=split(/\&/,$pack_entry);
6302: # ignore package.tab specified default values
6303: # here &package_tab_default() will fetch those
6304: if ($subp eq 'default') { next; }
6305: my $value=$packagetab{$pack_entry};
6306: my $unikey;
6307: if ($pack =~ /_0$/) {
6308: $unikey='parameter_0_'.$name;
6309: $part=0;
6310: } else {
6311: $unikey='parameter'.$keyroot.'_'.$name;
6312: }
6313: if ($subp eq 'display') {
6314: $value.=' [Part: '.$part.']';
6315: }
6316: $metaentry{':'.$unikey.'.part'}=$part;
6317: $metathesekeys{$unikey}=1;
6318: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6319: $metaentry{':'.$unikey.'.'.$subp}=$value;
6320: }
6321: if (defined($metaentry{':'.$unikey.'.default'})) {
6322: $metaentry{':'.$unikey}=
6323: $metaentry{':'.$unikey.'.default'};
6324: }
6325: }
6326: }
6327: } else {
6328: #
6329: # This is not a package - some other kind of start tag
6330: #
6331: my $entry=$token->[1];
6332: my $unikey;
6333: if ($entry eq 'import') {
6334: $unikey='';
6335: } else {
6336: $unikey=$entry;
6337: }
6338: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6339:
6340: if (defined($token->[2]->{'id'})) {
6341: $unikey.='_'.$token->[2]->{'id'};
6342: }
6343:
6344: if ($entry eq 'import') {
6345: #
6346: # Importing a library here
6347: #
6348: if ($depthcount<20) {
6349: my $location=$parser->get_text('/import');
6350: my $dir=$filename;
6351: $dir=~s|[^/]*$||;
6352: $location=&filelocation($dir,$location);
6353: my $metadata =
6354: &metadata($uri,'keys', $location,$unikey,
6355: $depthcount+1);
6356: foreach my $meta (split(',',$metadata)) {
6357: $metaentry{':'.$meta}=$metaentry{':'.$meta};
6358: $metathesekeys{$meta}=1;
6359: }
6360: }
6361: } else {
6362:
6363: if (defined($token->[2]->{'name'})) {
6364: $unikey.='_'.$token->[2]->{'name'};
6365: }
6366: $metathesekeys{$unikey}=1;
6367: foreach my $param (@{$token->[3]}) {
6368: $metaentry{':'.$unikey.'.'.$param} =
6369: $token->[2]->{$param};
6370: }
6371: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
6372: my $default=$metaentry{':'.$unikey.'.default'};
6373: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
6374: # only ws inside the tag, and not in default, so use default
6375: # as value
6376: $metaentry{':'.$unikey}=$default;
6377: } else {
6378: # either something interesting inside the tag or default
6379: # uninteresting
6380: $metaentry{':'.$unikey}=$internaltext;
6381: }
6382: # end of not-a-package not-a-library import
6383: }
6384: # end of not-a-package start tag
6385: }
6386: # the next is the end of "start tag"
6387: }
6388: }
6389: my ($extension) = ($uri =~ /\.(\w+)$/);
6390: foreach my $key (keys(%packagetab)) {
6391: #no specific packages #how's our extension
6392: if ($key!~/^extension_\Q$extension\E&/) { next; }
6393: &metadata_create_package_def($uri,$key,'extension_'.$extension,
6394: \%metathesekeys);
6395: }
6396: if (!exists($metaentry{':packages'})) {
6397: foreach my $key (keys(%packagetab)) {
6398: #no specific packages well let's get default then
6399: if ($key!~/^default&/) { next; }
6400: &metadata_create_package_def($uri,$key,'default',
6401: \%metathesekeys);
6402: }
6403: }
6404: # are there custom rights to evaluate
6405: if ($metaentry{':copyright'} eq 'custom') {
6406:
6407: #
6408: # Importing a rights file here
6409: #
6410: unless ($depthcount) {
6411: my $location=$metaentry{':customdistributionfile'};
6412: my $dir=$filename;
6413: $dir=~s|[^/]*$||;
6414: $location=&filelocation($dir,$location);
6415: my $rights_metadata =
6416: &metadata($uri,'keys',$location,'_rights',
6417: $depthcount+1);
6418: foreach my $rights (split(',',$rights_metadata)) {
6419: #$metaentry{':'.$rights}=$metacache{$uri}->{':'.$rights};
6420: $metathesekeys{$rights}=1;
6421: }
6422: }
6423: }
6424: # uniqifiy package listing
6425: my %seen;
6426: my @uniq_packages =
6427: grep { ! $seen{$_} ++ } (split(',',$metaentry{':packages'}));
6428: $metaentry{':packages'} = join(',',@uniq_packages);
6429:
6430: $metaentry{':keys'} = join(',',keys(%metathesekeys));
6431: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
6432: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
6433: &do_cache_new('meta',$uri,\%metaentry,60*60);
6434: # this is the end of "was not already recently cached
6435: }
6436: return $metaentry{':'.$what};
6437: }
6438:
6439: sub metadata_create_package_def {
6440: my ($uri,$key,$package,$metathesekeys)=@_;
6441: my ($pack,$name,$subp)=split(/\&/,$key);
6442: if ($subp eq 'default') { next; }
6443:
6444: if (defined($metaentry{':packages'})) {
6445: $metaentry{':packages'}.=','.$package;
6446: } else {
6447: $metaentry{':packages'}=$package;
6448: }
6449: my $value=$packagetab{$key};
6450: my $unikey;
6451: $unikey='parameter_0_'.$name;
6452: $metaentry{':'.$unikey.'.part'}=0;
6453: $$metathesekeys{$unikey}=1;
6454: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6455: $metaentry{':'.$unikey.'.'.$subp}=$value;
6456: }
6457: if (defined($metaentry{':'.$unikey.'.default'})) {
6458: $metaentry{':'.$unikey}=
6459: $metaentry{':'.$unikey.'.default'};
6460: }
6461: }
6462:
6463: sub metadata_generate_part0 {
6464: my ($metadata,$metacache,$uri) = @_;
6465: my %allnames;
6466: foreach my $metakey (keys(%$metadata)) {
6467: if ($metakey=~/^parameter\_(.*)/) {
6468: my $part=$$metacache{':'.$metakey.'.part'};
6469: my $name=$$metacache{':'.$metakey.'.name'};
6470: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
6471: $allnames{$name}=$part;
6472: }
6473: }
6474: }
6475: foreach my $name (keys(%allnames)) {
6476: $$metadata{"parameter_0_$name"}=1;
6477: my $key=":parameter_0_$name";
6478: $$metacache{"$key.part"}='0';
6479: $$metacache{"$key.name"}=$name;
6480: $$metacache{"$key.type"}=$$metacache{':parameter_'.
6481: $allnames{$name}.'_'.$name.
6482: '.type'};
6483: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
6484: '.display'};
6485: my $expr='[Part: '.$allnames{$name}.']';
6486: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
6487: $$metacache{"$key.display"}=$olddis;
6488: }
6489: }
6490:
6491: # ------------------------------------------------------ Devalidate title cache
6492:
6493: sub devalidate_title_cache {
6494: my ($url)=@_;
6495: if (!$env{'request.course.id'}) { return; }
6496: my $symb=&symbread($url);
6497: if (!$symb) { return; }
6498: my $key=$env{'request.course.id'}."\0".$symb;
6499: &devalidate_cache_new('title',$key);
6500: }
6501:
6502: # ------------------------------------------------- Get the title of a resource
6503:
6504: sub gettitle {
6505: my $urlsymb=shift;
6506: my $symb=&symbread($urlsymb);
6507: if ($symb) {
6508: my $key=$env{'request.course.id'}."\0".$symb;
6509: my ($result,$cached)=&is_cached_new('title',$key);
6510: if (defined($cached)) {
6511: return $result;
6512: }
6513: my ($map,$resid,$url)=&decode_symb($symb);
6514: my $title='';
6515: my %bighash;
6516: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6517: &GDBM_READER(),0640)) {
6518: my $mapid=$bighash{'map_pc_'.&clutter($map)};
6519: $title=$bighash{'title_'.$mapid.'.'.$resid};
6520: untie %bighash;
6521: }
6522: $title=~s/\&colon\;/\:/gs;
6523: if ($title) {
6524: return &do_cache_new('title',$key,$title,600);
6525: }
6526: $urlsymb=$url;
6527: }
6528: my $title=&metadata($urlsymb,'title');
6529: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
6530: return $title;
6531: }
6532:
6533: sub get_slot {
6534: my ($which,$cnum,$cdom)=@_;
6535: if (!$cnum || !$cdom) {
6536: (undef,my $courseid)=&whichuser();
6537: $cdom=$env{'course.'.$courseid.'.domain'};
6538: $cnum=$env{'course.'.$courseid.'.num'};
6539: }
6540: my $key=join("\0",'slots',$cdom,$cnum,$which);
6541: my %slotinfo;
6542: if (exists($remembered{$key})) {
6543: $slotinfo{$which} = $remembered{$key};
6544: } else {
6545: %slotinfo=&get('slots',[$which],$cdom,$cnum);
6546: &Apache::lonhomework::showhash(%slotinfo);
6547: my ($tmp)=keys(%slotinfo);
6548: if ($tmp=~/^error:/) { return (); }
6549: $remembered{$key} = $slotinfo{$which};
6550: }
6551: if (ref($slotinfo{$which}) eq 'HASH') {
6552: return %{$slotinfo{$which}};
6553: }
6554: return $slotinfo{$which};
6555: }
6556: # ------------------------------------------------- Update symbolic store links
6557:
6558: sub symblist {
6559: my ($mapname,%newhash)=@_;
6560: $mapname=&deversion(&declutter($mapname));
6561: my %hash;
6562: if (($env{'request.course.fn'}) && (%newhash)) {
6563: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6564: &GDBM_WRCREAT(),0640)) {
6565: foreach my $url (keys %newhash) {
6566: next if ($url eq 'last_known'
6567: && $env{'form.no_update_last_known'});
6568: $hash{declutter($url)}=&encode_symb($mapname,
6569: $newhash{$url}->[1],
6570: $newhash{$url}->[0]);
6571: }
6572: if (untie(%hash)) {
6573: return 'ok';
6574: }
6575: }
6576: }
6577: return 'error';
6578: }
6579:
6580: # --------------------------------------------------------------- Verify a symb
6581:
6582: sub symbverify {
6583: my ($symb,$thisurl)=@_;
6584: my $thisfn=$thisurl;
6585: $thisfn=&declutter($thisfn);
6586: # direct jump to resource in page or to a sequence - will construct own symbs
6587: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
6588: # check URL part
6589: my ($map,$resid,$url)=&decode_symb($symb);
6590:
6591: unless ($url eq $thisfn) { return 0; }
6592:
6593: $symb=&symbclean($symb);
6594: $thisurl=&deversion($thisurl);
6595: $thisfn=&deversion($thisfn);
6596:
6597: my %bighash;
6598: my $okay=0;
6599:
6600: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6601: &GDBM_READER(),0640)) {
6602: my $ids=$bighash{'ids_'.&clutter($thisurl)};
6603: unless ($ids) {
6604: $ids=$bighash{'ids_/'.$thisurl};
6605: }
6606: if ($ids) {
6607: # ------------------------------------------------------------------- Has ID(s)
6608: foreach my $id (split(/\,/,$ids)) {
6609: my ($mapid,$resid)=split(/\./,$id);
6610: if (
6611: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
6612: eq $symb) {
6613: if (($env{'request.role.adv'}) ||
6614: $bighash{'encrypted_'.$id} eq $env{'request.enc'}) {
6615: $okay=1;
6616: }
6617: }
6618: }
6619: }
6620: untie(%bighash);
6621: }
6622: return $okay;
6623: }
6624:
6625: # --------------------------------------------------------------- Clean-up symb
6626:
6627: sub symbclean {
6628: my $symb=shift;
6629: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6630: # remove version from map
6631: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
6632:
6633: # remove version from URL
6634: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
6635:
6636: # remove wrapper
6637:
6638: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
6639: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
6640: return $symb;
6641: }
6642:
6643: # ---------------------------------------------- Split symb to find map and url
6644:
6645: sub encode_symb {
6646: my ($map,$resid,$url)=@_;
6647: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
6648: }
6649:
6650: sub decode_symb {
6651: my $symb=shift;
6652: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6653: my ($map,$resid,$url)=split(/___/,$symb);
6654: return (&fixversion($map),$resid,&fixversion($url));
6655: }
6656:
6657: sub fixversion {
6658: my $fn=shift;
6659: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
6660: my %bighash;
6661: my $uri=&clutter($fn);
6662: my $key=$env{'request.course.id'}.'_'.$uri;
6663: # is this cached?
6664: my ($result,$cached)=&is_cached_new('courseresversion',$key);
6665: if (defined($cached)) { return $result; }
6666: # unfortunately not cached, or expired
6667: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6668: &GDBM_READER(),0640)) {
6669: if ($bighash{'version_'.$uri}) {
6670: my $version=$bighash{'version_'.$uri};
6671: unless (($version eq 'mostrecent') ||
6672: ($version==&getversion($uri))) {
6673: $uri=~s/\.(\w+)$/\.$version\.$1/;
6674: }
6675: }
6676: untie %bighash;
6677: }
6678: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
6679: }
6680:
6681: sub deversion {
6682: my $url=shift;
6683: $url=~s/\.\d+\.(\w+)$/\.$1/;
6684: return $url;
6685: }
6686:
6687: # ------------------------------------------------------ Return symb list entry
6688:
6689: sub symbread {
6690: my ($thisfn,$donotrecurse)=@_;
6691: my $cache_str='request.symbread.cached.'.$thisfn;
6692: if (defined($env{$cache_str})) { return $env{$cache_str}; }
6693: # no filename provided? try from environment
6694: unless ($thisfn) {
6695: if ($env{'request.symb'}) {
6696: return $env{$cache_str}=&symbclean($env{'request.symb'});
6697: }
6698: $thisfn=$env{'request.filename'};
6699: }
6700: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
6701: # is that filename actually a symb? Verify, clean, and return
6702: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
6703: if (&symbverify($thisfn,$1)) {
6704: return $env{$cache_str}=&symbclean($thisfn);
6705: }
6706: }
6707: $thisfn=declutter($thisfn);
6708: my %hash;
6709: my %bighash;
6710: my $syval='';
6711: if (($env{'request.course.fn'}) && ($thisfn)) {
6712: my $targetfn = $thisfn;
6713: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
6714: $targetfn = 'adm/wrapper/'.$thisfn;
6715: }
6716: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
6717: $targetfn=$1;
6718: }
6719: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6720: &GDBM_READER(),0640)) {
6721: $syval=$hash{$targetfn};
6722: untie(%hash);
6723: }
6724: # ---------------------------------------------------------- There was an entry
6725: if ($syval) {
6726: #unless ($syval=~/\_\d+$/) {
6727: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
6728: #&appenv('request.ambiguous' => $thisfn);
6729: #return $env{$cache_str}='';
6730: #}
6731: #$syval.=$1;
6732: #}
6733: } else {
6734: # ------------------------------------------------------- Was not in symb table
6735: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6736: &GDBM_READER(),0640)) {
6737: # ---------------------------------------------- Get ID(s) for current resource
6738: my $ids=$bighash{'ids_'.&clutter($thisfn)};
6739: unless ($ids) {
6740: $ids=$bighash{'ids_/'.$thisfn};
6741: }
6742: unless ($ids) {
6743: # alias?
6744: $ids=$bighash{'mapalias_'.$thisfn};
6745: }
6746: if ($ids) {
6747: # ------------------------------------------------------------------- Has ID(s)
6748: my @possibilities=split(/\,/,$ids);
6749: if ($#possibilities==0) {
6750: # ----------------------------------------------- There is only one possibility
6751: my ($mapid,$resid)=split(/\./,$ids);
6752: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6753: $resid,$thisfn);
6754: } elsif (!$donotrecurse) {
6755: # ------------------------------------------ There is more than one possibility
6756: my $realpossible=0;
6757: foreach my $id (@possibilities) {
6758: my $file=$bighash{'src_'.$id};
6759: if (&allowed('bre',$file)) {
6760: my ($mapid,$resid)=split(/\./,$id);
6761: if ($bighash{'map_type_'.$mapid} ne 'page') {
6762: $realpossible++;
6763: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6764: $resid,$thisfn);
6765: }
6766: }
6767: }
6768: if ($realpossible!=1) { $syval=''; }
6769: } else {
6770: $syval='';
6771: }
6772: }
6773: untie(%bighash)
6774: }
6775: }
6776: if ($syval) {
6777: return $env{$cache_str}=$syval;
6778: }
6779: }
6780: &appenv('request.ambiguous' => $thisfn);
6781: return $env{$cache_str}='';
6782: }
6783:
6784: # ---------------------------------------------------------- Return random seed
6785:
6786: sub numval {
6787: my $txt=shift;
6788: $txt=~tr/A-J/0-9/;
6789: $txt=~tr/a-j/0-9/;
6790: $txt=~tr/K-T/0-9/;
6791: $txt=~tr/k-t/0-9/;
6792: $txt=~tr/U-Z/0-5/;
6793: $txt=~tr/u-z/0-5/;
6794: $txt=~s/\D//g;
6795: if ($_64bit) { if ($txt > 2**32) { return -1; } }
6796: return int($txt);
6797: }
6798:
6799: sub numval2 {
6800: my $txt=shift;
6801: $txt=~tr/A-J/0-9/;
6802: $txt=~tr/a-j/0-9/;
6803: $txt=~tr/K-T/0-9/;
6804: $txt=~tr/k-t/0-9/;
6805: $txt=~tr/U-Z/0-5/;
6806: $txt=~tr/u-z/0-5/;
6807: $txt=~s/\D//g;
6808: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6809: my $total;
6810: foreach my $val (@txts) { $total+=$val; }
6811: if ($_64bit) { if ($total > 2**32) { return -1; } }
6812: return int($total);
6813: }
6814:
6815: sub numval3 {
6816: use integer;
6817: my $txt=shift;
6818: $txt=~tr/A-J/0-9/;
6819: $txt=~tr/a-j/0-9/;
6820: $txt=~tr/K-T/0-9/;
6821: $txt=~tr/k-t/0-9/;
6822: $txt=~tr/U-Z/0-5/;
6823: $txt=~tr/u-z/0-5/;
6824: $txt=~s/\D//g;
6825: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6826: my $total;
6827: foreach my $val (@txts) { $total+=$val; }
6828: if ($_64bit) { $total=(($total<<32)>>32); }
6829: return $total;
6830: }
6831:
6832: sub digest {
6833: my ($data)=@_;
6834: my $digest=&Digest::MD5::md5($data);
6835: my ($a,$b,$c,$d)=unpack("iiii",$digest);
6836: my ($e,$f);
6837: {
6838: use integer;
6839: $e=($a+$b);
6840: $f=($c+$d);
6841: if ($_64bit) {
6842: $e=(($e<<32)>>32);
6843: $f=(($f<<32)>>32);
6844: }
6845: }
6846: if (wantarray) {
6847: return ($e,$f);
6848: } else {
6849: my $g;
6850: {
6851: use integer;
6852: $g=($e+$f);
6853: if ($_64bit) {
6854: $g=(($g<<32)>>32);
6855: }
6856: }
6857: return $g;
6858: }
6859: }
6860:
6861: sub latest_rnd_algorithm_id {
6862: return '64bit5';
6863: }
6864:
6865: sub get_rand_alg {
6866: my ($courseid)=@_;
6867: if (!$courseid) { $courseid=(&whichuser())[1]; }
6868: if ($courseid) {
6869: return $env{"course.$courseid.rndseed"};
6870: }
6871: return &latest_rnd_algorithm_id();
6872: }
6873:
6874: sub validCODE {
6875: my ($CODE)=@_;
6876: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
6877: return 0;
6878: }
6879:
6880: sub getCODE {
6881: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
6882: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
6883: defined($Apache::lonhomework::parsing_a_task) ) &&
6884: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
6885: return $Apache::lonhomework::history{'resource.CODE'};
6886: }
6887: return undef;
6888: }
6889:
6890: sub rndseed {
6891: my ($symb,$courseid,$domain,$username)=@_;
6892:
6893: my ($wsymb,$wcourseid,$wdomain,$wusername)=&whichuser();
6894: if (!$symb) {
6895: unless ($symb=$wsymb) { return time; }
6896: }
6897: if (!$courseid) { $courseid=$wcourseid; }
6898: if (!$domain) { $domain=$wdomain; }
6899: if (!$username) { $username=$wusername }
6900: my $which=&get_rand_alg();
6901:
6902: if (defined(&getCODE())) {
6903: if ($which eq '64bit5') {
6904: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
6905: } elsif ($which eq '64bit4') {
6906: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
6907: } else {
6908: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
6909: }
6910: } elsif ($which eq '64bit5') {
6911: return &rndseed_64bit5($symb,$courseid,$domain,$username);
6912: } elsif ($which eq '64bit4') {
6913: return &rndseed_64bit4($symb,$courseid,$domain,$username);
6914: } elsif ($which eq '64bit3') {
6915: return &rndseed_64bit3($symb,$courseid,$domain,$username);
6916: } elsif ($which eq '64bit2') {
6917: return &rndseed_64bit2($symb,$courseid,$domain,$username);
6918: } elsif ($which eq '64bit') {
6919: return &rndseed_64bit($symb,$courseid,$domain,$username);
6920: }
6921: return &rndseed_32bit($symb,$courseid,$domain,$username);
6922: }
6923:
6924: sub rndseed_32bit {
6925: my ($symb,$courseid,$domain,$username)=@_;
6926: {
6927: use integer;
6928: my $symbchck=unpack("%32C*",$symb) << 27;
6929: my $symbseed=numval($symb) << 22;
6930: my $namechck=unpack("%32C*",$username) << 17;
6931: my $nameseed=numval($username) << 12;
6932: my $domainseed=unpack("%32C*",$domain) << 7;
6933: my $courseseed=unpack("%32C*",$courseid);
6934: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
6935: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6936: #&logthis("rndseed :$num:$symb");
6937: if ($_64bit) { $num=(($num<<32)>>32); }
6938: return $num;
6939: }
6940: }
6941:
6942: sub rndseed_64bit {
6943: my ($symb,$courseid,$domain,$username)=@_;
6944: {
6945: use integer;
6946: my $symbchck=unpack("%32S*",$symb) << 21;
6947: my $symbseed=numval($symb) << 10;
6948: my $namechck=unpack("%32S*",$username);
6949:
6950: my $nameseed=numval($username) << 21;
6951: my $domainseed=unpack("%32S*",$domain) << 10;
6952: my $courseseed=unpack("%32S*",$courseid);
6953:
6954: my $num1=$symbchck+$symbseed+$namechck;
6955: my $num2=$nameseed+$domainseed+$courseseed;
6956: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6957: #&logthis("rndseed :$num:$symb");
6958: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6959: return "$num1,$num2";
6960: }
6961: }
6962:
6963: sub rndseed_64bit2 {
6964: my ($symb,$courseid,$domain,$username)=@_;
6965: {
6966: use integer;
6967: # strings need to be an even # of cahracters long, it it is odd the
6968: # last characters gets thrown away
6969: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6970: my $symbseed=numval($symb) << 10;
6971: my $namechck=unpack("%32S*",$username.' ');
6972:
6973: my $nameseed=numval($username) << 21;
6974: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6975: my $courseseed=unpack("%32S*",$courseid.' ');
6976:
6977: my $num1=$symbchck+$symbseed+$namechck;
6978: my $num2=$nameseed+$domainseed+$courseseed;
6979: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6980: #&logthis("rndseed :$num:$symb");
6981: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6982: return "$num1,$num2";
6983: }
6984: }
6985:
6986: sub rndseed_64bit3 {
6987: my ($symb,$courseid,$domain,$username)=@_;
6988: {
6989: use integer;
6990: # strings need to be an even # of cahracters long, it it is odd the
6991: # last characters gets thrown away
6992: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6993: my $symbseed=numval2($symb) << 10;
6994: my $namechck=unpack("%32S*",$username.' ');
6995:
6996: my $nameseed=numval2($username) << 21;
6997: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6998: my $courseseed=unpack("%32S*",$courseid.' ');
6999:
7000: my $num1=$symbchck+$symbseed+$namechck;
7001: my $num2=$nameseed+$domainseed+$courseseed;
7002: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7003: #&logthis("rndseed :$num1:$num2:$_64bit");
7004: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7005:
7006: return "$num1:$num2";
7007: }
7008: }
7009:
7010: sub rndseed_64bit4 {
7011: my ($symb,$courseid,$domain,$username)=@_;
7012: {
7013: use integer;
7014: # strings need to be an even # of cahracters long, it it is odd the
7015: # last characters gets thrown away
7016: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7017: my $symbseed=numval3($symb) << 10;
7018: my $namechck=unpack("%32S*",$username.' ');
7019:
7020: my $nameseed=numval3($username) << 21;
7021: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7022: my $courseseed=unpack("%32S*",$courseid.' ');
7023:
7024: my $num1=$symbchck+$symbseed+$namechck;
7025: my $num2=$nameseed+$domainseed+$courseseed;
7026: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7027: #&logthis("rndseed :$num1:$num2:$_64bit");
7028: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7029:
7030: return "$num1:$num2";
7031: }
7032: }
7033:
7034: sub rndseed_64bit5 {
7035: my ($symb,$courseid,$domain,$username)=@_;
7036: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
7037: return "$num1:$num2";
7038: }
7039:
7040: sub rndseed_CODE_64bit {
7041: my ($symb,$courseid,$domain,$username)=@_;
7042: {
7043: use integer;
7044: my $symbchck=unpack("%32S*",$symb.' ') << 16;
7045: my $symbseed=numval2($symb);
7046: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
7047: my $CODEseed=numval(&getCODE());
7048: my $courseseed=unpack("%32S*",$courseid.' ');
7049: my $num1=$symbseed+$CODEchck;
7050: my $num2=$CODEseed+$courseseed+$symbchck;
7051: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
7052: #&logthis("rndseed :$num1:$num2:$symb");
7053: if ($_64bit) { $num1=(($num1<<32)>>32); }
7054: if ($_64bit) { $num2=(($num2<<32)>>32); }
7055: return "$num1:$num2";
7056: }
7057: }
7058:
7059: sub rndseed_CODE_64bit4 {
7060: my ($symb,$courseid,$domain,$username)=@_;
7061: {
7062: use integer;
7063: my $symbchck=unpack("%32S*",$symb.' ') << 16;
7064: my $symbseed=numval3($symb);
7065: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
7066: my $CODEseed=numval3(&getCODE());
7067: my $courseseed=unpack("%32S*",$courseid.' ');
7068: my $num1=$symbseed+$CODEchck;
7069: my $num2=$CODEseed+$courseseed+$symbchck;
7070: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
7071: #&logthis("rndseed :$num1:$num2:$symb");
7072: if ($_64bit) { $num1=(($num1<<32)>>32); }
7073: if ($_64bit) { $num2=(($num2<<32)>>32); }
7074: return "$num1:$num2";
7075: }
7076: }
7077:
7078: sub rndseed_CODE_64bit5 {
7079: my ($symb,$courseid,$domain,$username)=@_;
7080: my $code = &getCODE();
7081: my ($num1,$num2)=&digest("$symb,$courseid,$code");
7082: return "$num1:$num2";
7083: }
7084:
7085: sub setup_random_from_rndseed {
7086: my ($rndseed)=@_;
7087: if ($rndseed =~/([,:])/) {
7088: my ($num1,$num2)=split(/[,:]/,$rndseed);
7089: &Math::Random::random_set_seed(abs($num1),abs($num2));
7090: } else {
7091: &Math::Random::random_set_seed_from_phrase($rndseed);
7092: }
7093: }
7094:
7095: sub latest_receipt_algorithm_id {
7096: return 'receipt3';
7097: }
7098:
7099: sub recunique {
7100: my $fucourseid=shift;
7101: my $unique;
7102: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
7103: $env{"course.$fucourseid.receiptalg"} eq 'receipt3' ) {
7104: $unique=$env{"course.$fucourseid.internal.encseed"};
7105: } else {
7106: $unique=$perlvar{'lonReceipt'};
7107: }
7108: return unpack("%32C*",$unique);
7109: }
7110:
7111: sub recprefix {
7112: my $fucourseid=shift;
7113: my $prefix;
7114: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2'||
7115: $env{"course.$fucourseid.receiptalg"} eq 'receipt3' ) {
7116: $prefix=$env{"course.$fucourseid.internal.encpref"};
7117: } else {
7118: $prefix=$perlvar{'lonHostID'};
7119: }
7120: return unpack("%32C*",$prefix);
7121: }
7122:
7123: sub ireceipt {
7124: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
7125:
7126: my $return =&recprefix($fucourseid).'-';
7127:
7128: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt3' ||
7129: $env{'request.state'} eq 'construct') {
7130: $return .= (&digest("$funame,$fudom,$fucourseid,$fusymb,$part")%10000);
7131: return $return;
7132: }
7133:
7134: my $cuname=unpack("%32C*",$funame);
7135: my $cudom=unpack("%32C*",$fudom);
7136: my $cucourseid=unpack("%32C*",$fucourseid);
7137: my $cusymb=unpack("%32C*",$fusymb);
7138: my $cunique=&recunique($fucourseid);
7139: my $cpart=unpack("%32S*",$part);
7140: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
7141:
7142: #&logthis("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname)." and ".($cpart%$cudom));
7143:
7144: $return.= ($cunique%$cuname+
7145: $cunique%$cudom+
7146: $cusymb%$cuname+
7147: $cusymb%$cudom+
7148: $cucourseid%$cuname+
7149: $cucourseid%$cudom+
7150: $cpart%$cuname+
7151: $cpart%$cudom);
7152: } else {
7153: $return.= ($cunique%$cuname+
7154: $cunique%$cudom+
7155: $cusymb%$cuname+
7156: $cusymb%$cudom+
7157: $cucourseid%$cuname+
7158: $cucourseid%$cudom);
7159: }
7160: return $return;
7161: }
7162:
7163: sub receipt {
7164: my ($part)=@_;
7165: my ($symb,$courseid,$domain,$name) = &whichuser();
7166: return &ireceipt($name,$domain,$courseid,$symb,$part);
7167: }
7168:
7169: sub whichuser {
7170: my ($passedsymb)=@_;
7171: my ($symb,$courseid,$domain,$name,$publicuser);
7172: if (defined($env{'form.grade_symb'})) {
7173: my ($tmp_courseid)=&get_env_multiple('form.grade_courseid');
7174: my $allowed=&allowed('vgr',$tmp_courseid);
7175: if (!$allowed &&
7176: exists($env{'request.course.sec'}) &&
7177: $env{'request.course.sec'} !~ /^\s*$/) {
7178: $allowed=&allowed('vgr',$tmp_courseid.
7179: '/'.$env{'request.course.sec'});
7180: }
7181: if ($allowed) {
7182: ($symb)=&get_env_multiple('form.grade_symb');
7183: $courseid=$tmp_courseid;
7184: ($domain)=&get_env_multiple('form.grade_domain');
7185: ($name)=&get_env_multiple('form.grade_username');
7186: return ($symb,$courseid,$domain,$name,$publicuser);
7187: }
7188: }
7189: if (!$passedsymb) {
7190: $symb=&symbread();
7191: } else {
7192: $symb=$passedsymb;
7193: }
7194: $courseid=$env{'request.course.id'};
7195: $domain=$env{'user.domain'};
7196: $name=$env{'user.name'};
7197: if ($name eq 'public' && $domain eq 'public') {
7198: if (!defined($env{'form.username'})) {
7199: $env{'form.username'}.=time.rand(10000000);
7200: }
7201: $name.=$env{'form.username'};
7202: }
7203: return ($symb,$courseid,$domain,$name,$publicuser);
7204:
7205: }
7206:
7207: # ------------------------------------------------------------ Serves up a file
7208: # returns either the contents of the file or
7209: # -1 if the file doesn't exist
7210: #
7211: # if the target is a file that was uploaded via DOCS,
7212: # a check will be made to see if a current copy exists on the local server,
7213: # if it does this will be served, otherwise a copy will be retrieved from
7214: # the home server for the course and stored in /home/httpd/html/userfiles on
7215: # the local server.
7216:
7217: sub getfile {
7218: my ($file) = @_;
7219: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
7220: &repcopy($file);
7221: return &readfile($file);
7222: }
7223:
7224: sub repcopy_userfile {
7225: my ($file)=@_;
7226: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
7227: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
7228: my ($cdom,$cnum,$filename) =
7229: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+($match_domain)/+($match_name)/+(.*)|);
7230: my $uri="/uploaded/$cdom/$cnum/$filename";
7231: if (-e "$file") {
7232: # we already have a local copy, check it out
7233: my @fileinfo = stat($file);
7234: my $rtncode;
7235: my $info;
7236: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
7237: if ($lwpresp ne 'ok') {
7238: # there is no such file anymore, even though we had a local copy
7239: if ($rtncode eq '404') {
7240: unlink($file);
7241: }
7242: return -1;
7243: }
7244: if ($info < $fileinfo[9]) {
7245: # nice, the file we have is up-to-date, just say okay
7246: return 'ok';
7247: } else {
7248: # the file is outdated, get rid of it
7249: unlink($file);
7250: }
7251: }
7252: # one way or the other, at this point, we don't have the file
7253: # construct the correct path for the file
7254: my @parts = ($cdom,$cnum);
7255: if ($filename =~ m|^(.+)/[^/]+$|) {
7256: push @parts, split(/\//,$1);
7257: }
7258: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
7259: foreach my $part (@parts) {
7260: $path .= '/'.$part;
7261: if (!-e $path) {
7262: mkdir($path,0770);
7263: }
7264: }
7265: # now the path exists for sure
7266: # get a user agent
7267: my $ua=new LWP::UserAgent;
7268: my $transferfile=$file.'.in.transfer';
7269: # FIXME: this should flock
7270: if (-e $transferfile) { return 'ok'; }
7271: my $request;
7272: $uri=~s/^\///;
7273: $request=new HTTP::Request('GET','http://'.&hostname(&homeserver($cnum,$cdom)).'/raw/'.$uri);
7274: my $response=$ua->request($request,$transferfile);
7275: # did it work?
7276: if ($response->is_error()) {
7277: unlink($transferfile);
7278: &logthis("Userfile repcopy failed for $uri");
7279: return -1;
7280: }
7281: # worked, rename the transfer file
7282: rename($transferfile,$file);
7283: return 'ok';
7284: }
7285:
7286: sub tokenwrapper {
7287: my $uri=shift;
7288: $uri=~s|^http\://([^/]+)||;
7289: $uri=~s|^/||;
7290: $env{'user.environment'}=~/\/([^\/]+)\.id/;
7291: my $token=$1;
7292: my (undef,$udom,$uname,$file)=split('/',$uri,4);
7293: if ($udom && $uname && $file) {
7294: $file=~s|(\?\.*)*$||;
7295: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
7296: return 'http://'.&hostname(&homeserver($uname,$udom)).'/'.$uri.
7297: (($uri=~/\?/)?'&':'?').'token='.$token.
7298: '&tokenissued='.$perlvar{'lonHostID'};
7299: } else {
7300: return '/adm/notfound.html';
7301: }
7302: }
7303:
7304: # call with reqtype HEAD: get last modification time
7305: # call with reqtype GET: get the file contents
7306: # Do not call this with reqtype GET for large files! It loads everything into memory
7307: #
7308: sub getuploaded {
7309: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
7310: $uri=~s/^\///;
7311: $uri = 'http://'.&hostname(&homeserver($cnum,$cdom)).'/raw/'.$uri;
7312: my $ua=new LWP::UserAgent;
7313: my $request=new HTTP::Request($reqtype,$uri);
7314: my $response=$ua->request($request);
7315: $$rtncode = $response->code;
7316: if (! $response->is_success()) {
7317: return 'failed';
7318: }
7319: if ($reqtype eq 'HEAD') {
7320: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
7321: } elsif ($reqtype eq 'GET') {
7322: $$info = $response->content;
7323: }
7324: return 'ok';
7325: }
7326:
7327: sub readfile {
7328: my $file = shift;
7329: if ( (! -e $file ) || ($file eq '') ) { return -1; };
7330: my $fh;
7331: open($fh,"<$file");
7332: my $a='';
7333: while (my $line = <$fh>) { $a .= $line; }
7334: return $a;
7335: }
7336:
7337: sub filelocation {
7338: my ($dir,$file) = @_;
7339: my $location;
7340: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
7341:
7342: if ($file =~ m-^/adm/-) {
7343: $file=~s-^/adm/wrapper/-/-;
7344: $file=~s-^/adm/coursedocs/showdoc/-/-;
7345: }
7346: if ($file=~m:^/~:) { # is a contruction space reference
7347: $location = $file;
7348: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
7349: } elsif ($file=~m{^/home/$match_username/public_html/}) {
7350: # is a correct contruction space reference
7351: $location = $file;
7352: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
7353: my ($udom,$uname,$filename)=
7354: ($file=~m -^/+(?:uploaded|editupload)/+($match_domain)/+($match_name)/+(.*)$-);
7355: my $home=&homeserver($uname,$udom);
7356: my $is_me=0;
7357: my @ids=¤t_machine_ids();
7358: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
7359: if ($is_me) {
7360: $location=&propath($udom,$uname).
7361: '/userfiles/'.$filename;
7362: } else {
7363: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
7364: $udom.'/'.$uname.'/'.$filename;
7365: }
7366: } else {
7367: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7368: $file=~s:^/res/:/:;
7369: if ( !( $file =~ m:^/:) ) {
7370: $location = $dir. '/'.$file;
7371: } else {
7372: $location = '/home/httpd/html/res'.$file;
7373: }
7374: }
7375: $location=~s://+:/:g; # remove duplicate /
7376: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
7377: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
7378: return $location;
7379: }
7380:
7381: sub hreflocation {
7382: my ($dir,$file)=@_;
7383: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
7384: $file=filelocation($dir,$file);
7385: } elsif ($file=~m-^/adm/-) {
7386: $file=~s-^/adm/wrapper/-/-;
7387: $file=~s-^/adm/coursedocs/showdoc/-/-;
7388: }
7389: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
7390: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
7391: } elsif ($file=~m-/home/($match_username)/public_html/-) {
7392: $file=~s-^/home/($match_username)/public_html/-/~$1/-;
7393: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
7394: $file=~s-^/home/httpd/lonUsers/($match_domain)/./././($match_name)/userfiles/
7395: -/uploaded/$1/$2/-x;
7396: }
7397: return $file;
7398: }
7399:
7400: sub current_machine_domains {
7401: my $hostname=&hostname($perlvar{'lonHostID'});
7402: my @domains;
7403: my %hostname = &all_hostnames();
7404: while( my($id, $name) = each(%hostname)) {
7405: # &logthis("-$id-$name-$hostname-");
7406: if ($hostname eq $name) {
7407: push(@domains,$hostdom{$id});
7408: }
7409: }
7410: return @domains;
7411: }
7412:
7413: sub current_machine_ids {
7414: my $hostname=&hostname($perlvar{'lonHostID'});
7415: my @ids;
7416: my %hostname = &all_hostnames();
7417: while( my($id, $name) = each(%hostname)) {
7418: # &logthis("-$id-$name-$hostname-");
7419: if ($hostname eq $name) {
7420: push(@ids,$id);
7421: }
7422: }
7423: return @ids;
7424: }
7425:
7426: sub additional_machine_domains {
7427: my @domains;
7428: open(my $fh,"<$perlvar{'lonTabDir'}/expected_domains.tab");
7429: while( my $line = <$fh>) {
7430: $line =~ s/\s//g;
7431: push(@domains,$line);
7432: }
7433: return @domains;
7434: }
7435:
7436: sub default_login_domain {
7437: my $domain = $perlvar{'lonDefDomain'};
7438: my $testdomain=(split(/\./,$ENV{'HTTP_HOST'}))[0];
7439: foreach my $posdom (¤t_machine_domains(),
7440: &additional_machine_domains()) {
7441: if (lc($posdom) eq lc($testdomain)) {
7442: $domain=$posdom;
7443: last;
7444: }
7445: }
7446: return $domain;
7447: }
7448:
7449: # ------------------------------------------------------------- Declutters URLs
7450:
7451: sub declutter {
7452: my $thisfn=shift;
7453: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
7454: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7455: $thisfn=~s/^\///;
7456: $thisfn=~s|^adm/wrapper/||;
7457: $thisfn=~s|^adm/coursedocs/showdoc/||;
7458: $thisfn=~s/^res\///;
7459: $thisfn=~s/\?.+$//;
7460: return $thisfn;
7461: }
7462:
7463: # ------------------------------------------------------------- Clutter up URLs
7464:
7465: sub clutter {
7466: my $thisfn='/'.&declutter(shift);
7467: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
7468: $thisfn='/res'.$thisfn;
7469: }
7470: if ($thisfn !~m|/adm|) {
7471: if ($thisfn =~ m|/ext/|) {
7472: $thisfn='/adm/wrapper'.$thisfn;
7473: } else {
7474: my ($ext) = ($thisfn =~ /\.(\w+)$/);
7475: my $embstyle=&Apache::loncommon::fileembstyle($ext);
7476: if ($embstyle eq 'ssi'
7477: || ($embstyle eq 'hdn')
7478: || ($embstyle eq 'rat')
7479: || ($embstyle eq 'prv')
7480: || ($embstyle eq 'ign')) {
7481: #do nothing with these
7482: } elsif (($embstyle eq 'img')
7483: || ($embstyle eq 'emb')
7484: || ($embstyle eq 'wrp')) {
7485: $thisfn='/adm/wrapper'.$thisfn;
7486: } elsif ($embstyle eq 'unk'
7487: && $thisfn!~/\.(sequence|page)$/) {
7488: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
7489: } else {
7490: # &logthis("Got a blank emb style");
7491: }
7492: }
7493: }
7494: return $thisfn;
7495: }
7496:
7497: sub clutter_with_no_wrapper {
7498: my $uri = &clutter(shift);
7499: if ($uri =~ m-^/adm/-) {
7500: $uri =~ s-^/adm/wrapper/-/-;
7501: $uri =~ s-^/adm/coursedocs/showdoc/-/-;
7502: }
7503: return $uri;
7504: }
7505:
7506: sub freeze_escape {
7507: my ($value)=@_;
7508: if (ref($value)) {
7509: $value=&nfreeze($value);
7510: return '__FROZEN__'.&escape($value);
7511: }
7512: return &escape($value);
7513: }
7514:
7515:
7516: sub thaw_unescape {
7517: my ($value)=@_;
7518: if ($value =~ /^__FROZEN__/) {
7519: substr($value,0,10,undef);
7520: $value=&unescape($value);
7521: return &thaw($value);
7522: }
7523: return &unescape($value);
7524: }
7525:
7526: sub correct_line_ends {
7527: my ($result)=@_;
7528: $$result =~s/\r\n/\n/mg;
7529: $$result =~s/\r/\n/mg;
7530: }
7531: # ================================================================ Main Program
7532:
7533: sub goodbye {
7534: &logthis("Starting Shut down");
7535: #not converted to using infrastruture and probably shouldn't be
7536: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
7537: #converted
7538: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
7539: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
7540: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
7541: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
7542: #1.1 only
7543: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
7544: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
7545: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
7546: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
7547: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
7548: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
7549: &logthis(sprintf("%-20s is %s",'hits',$hits));
7550: &flushcourselogs();
7551: &logthis("Shutting down");
7552: }
7553:
7554: BEGIN {
7555: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
7556: unless ($readit) {
7557: {
7558: my $configvars = LONCAPA::Configuration::read_conf('loncapa.conf');
7559: %perlvar = (%perlvar,%{$configvars});
7560: }
7561:
7562: # ------------------------------------------------------------ Read domain file
7563: {
7564: %domaindescription = ();
7565: %domain_auth_def = ();
7566: %domain_auth_arg_def = ();
7567: my $fh;
7568: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
7569: while (my $line = <$fh>) {
7570: next if ($line =~ /^(\#|\s*$)/);
7571: # next if /^\#/;
7572: chomp $line;
7573: my ($domain, $domain_description, $def_auth, $def_auth_arg,
7574: $def_lang, $city, $longi, $lati, $primary) = split(/:/,$line,9);
7575: $domain_auth_def{$domain}=$def_auth;
7576: $domain_auth_arg_def{$domain}=$def_auth_arg;
7577: $domaindescription{$domain}=$domain_description;
7578: $domain_lang_def{$domain}=$def_lang;
7579: $domain_city{$domain}=$city;
7580: $domain_longi{$domain}=$longi;
7581: $domain_lati{$domain}=$lati;
7582: $domain_primary{$domain}=$primary;
7583:
7584: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
7585: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
7586: }
7587: }
7588: close ($fh);
7589: }
7590:
7591:
7592: # ------------------------------------------------------------- Read hosts file
7593: {
7594: my %hostname;
7595: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
7596:
7597: while (my $configline=<$config>) {
7598: next if ($configline =~ /^(\#|\s*$)/);
7599: chomp($configline);
7600: my ($id,$domain,$role,$name)=split(/:/,$configline);
7601: $name=~s/\s//g;
7602: if ($id && $domain && $role && $name) {
7603: $hostname{$id}=$name;
7604: $hostdom{$id}=$domain;
7605: if ($role eq 'library') { $libserv{$id}=$name; }
7606: }
7607: }
7608: close($config);
7609: # FIXME: dev server don't want this, production servers _do_ want this
7610: #&get_iphost();
7611:
7612: sub hostname {
7613: my ($lonid) = @_;
7614: return $hostname{$lonid};
7615: }
7616: sub all_hostnames {
7617: return %hostname;
7618: }
7619: sub get_servers {
7620: my ($domain,$type) = @_;
7621: my %possible_hosts = ($type eq 'library') ? %libserv
7622: : %hostname;
7623: my %result;
7624: if (ref($domain) eq 'ARRAY') {
7625: while ( my ($host,$hostname) = each(%possible_hosts)) {
7626: if (grep(/^\Q$hostdom{$host}\E$/,@$domain)) {
7627: $result{$host} = $hostname;
7628: }
7629: }
7630: } else {
7631: while ( my ($host,$hostname) = each(%possible_hosts)) {
7632: if ($hostdom{$host} eq $domain) {
7633: $result{$host} = $hostname;
7634: }
7635: }
7636: }
7637: return %result;
7638: }
7639: sub all_domains {
7640: my %seen;
7641: my @uniq = grep(!$seen{$_}++, values(%hostdom));
7642: return @uniq;
7643: }
7644: }
7645:
7646: sub get_hosts_from_ip {
7647: my ($ip) = @_;
7648: my %iphosts = &get_iphost();
7649: if (ref($iphosts{$ip})) {
7650: return @{$iphosts{$ip}};
7651: }
7652: return;
7653: }
7654:
7655: sub get_iphost {
7656: if (%iphost) { return %iphost; }
7657: my %name_to_ip;
7658: my %hostname = &all_hostnames();
7659: foreach my $id (keys(%hostname)) {
7660: my $name=$hostname{$id};
7661: my $ip;
7662: if (!exists($name_to_ip{$name})) {
7663: $ip = gethostbyname($name);
7664: if (!$ip || length($ip) ne 4) {
7665: &logthis("Skipping host $id name $name no IP found");
7666: next;
7667: }
7668: $ip=inet_ntoa($ip);
7669: $name_to_ip{$name} = $ip;
7670: } else {
7671: $ip = $name_to_ip{$name};
7672: }
7673: push(@{$iphost{$ip}},$id);
7674: }
7675: return %iphost;
7676: }
7677:
7678: # ------------------------------------------------------ Read spare server file
7679: {
7680: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
7681:
7682: while (my $configline=<$config>) {
7683: chomp($configline);
7684: if ($configline) {
7685: my ($host,$type) = split(':',$configline,2);
7686: if (!defined($type) || $type eq '') { $type = 'default' };
7687: push(@{ $spareid{$type} }, $host);
7688: }
7689: }
7690: close($config);
7691: }
7692: # ------------------------------------------------------------ Read permissions
7693: {
7694: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
7695:
7696: while (my $configline=<$config>) {
7697: chomp($configline);
7698: if ($configline) {
7699: my ($role,$perm)=split(/ /,$configline);
7700: if ($perm ne '') { $pr{$role}=$perm; }
7701: }
7702: }
7703: close($config);
7704: }
7705:
7706: # -------------------------------------------- Read plain texts for permissions
7707: {
7708: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
7709:
7710: while (my $configline=<$config>) {
7711: chomp($configline);
7712: if ($configline) {
7713: my ($short,@plain)=split(/:/,$configline);
7714: %{$prp{$short}} = ();
7715: if (@plain > 0) {
7716: $prp{$short}{'std'} = $plain[0];
7717: for (my $i=1; $i<@plain; $i++) {
7718: $prp{$short}{'alt'.$i} = $plain[$i];
7719: }
7720: }
7721: }
7722: }
7723: close($config);
7724: }
7725:
7726: # ---------------------------------------------------------- Read package table
7727: {
7728: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
7729:
7730: while (my $configline=<$config>) {
7731: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
7732: chomp($configline);
7733: my ($short,$plain)=split(/:/,$configline);
7734: my ($pack,$name)=split(/\&/,$short);
7735: if ($plain ne '') {
7736: $packagetab{$pack.'&'.$name.'&name'}=$name;
7737: $packagetab{$short}=$plain;
7738: }
7739: }
7740: close($config);
7741: }
7742:
7743: # ------------- set up temporary directory
7744: {
7745: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
7746:
7747: }
7748:
7749: $memcache=new Cache::Memcached({'servers' => ['127.0.0.1:11211'],
7750: 'compress_threshold'=> 20_000,
7751: });
7752:
7753: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
7754: $dumpcount=0;
7755:
7756: &logtouch();
7757: &logthis('<font color="yellow">INFO: Read configuration</font>');
7758: $readit=1;
7759: {
7760: use integer;
7761: my $test=(2**32)+1;
7762: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
7763: &logthis(" Detected 64bit platform ($_64bit)");
7764: }
7765: }
7766: }
7767:
7768: 1;
7769: __END__
7770:
7771: =pod
7772:
7773: =head1 NAME
7774:
7775: Apache::lonnet - Subroutines to ask questions about things in the network.
7776:
7777: =head1 SYNOPSIS
7778:
7779: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
7780:
7781: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
7782:
7783: Common parameters:
7784:
7785: =over 4
7786:
7787: =item *
7788:
7789: $uname : an internal username (if $cname expecting a course Id specifically)
7790:
7791: =item *
7792:
7793: $udom : a domain (if $cdom expecting a course's domain specifically)
7794:
7795: =item *
7796:
7797: $symb : a resource instance identifier
7798:
7799: =item *
7800:
7801: $namespace : the name of a .db file that contains the data needed or
7802: being set.
7803:
7804: =back
7805:
7806: =head1 OVERVIEW
7807:
7808: lonnet provides subroutines which interact with the
7809: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
7810: about classes, users, and resources.
7811:
7812: For many of these objects you can also use this to store data about
7813: them or modify them in various ways.
7814:
7815: =head2 Symbs
7816:
7817: To identify a specific instance of a resource, LON-CAPA uses symbols
7818: or "symbs"X<symb>. These identifiers are built from the URL of the
7819: map, the resource number of the resource in the map, and the URL of
7820: the resource itself. The latter is somewhat redundant, but might help
7821: if maps change.
7822:
7823: An example is
7824:
7825: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
7826:
7827: The respective map entry is
7828:
7829: <resource id="19" src="/res/msu/korte/tests/part12.problem"
7830: title="Problem 2">
7831: </resource>
7832:
7833: Symbs are used by the random number generator, as well as to store and
7834: restore data specific to a certain instance of for example a problem.
7835:
7836: =head2 Storing And Retrieving Data
7837:
7838: X<store()>X<cstore()>X<restore()>Three of the most important functions
7839: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
7840: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
7841: is is the non-critical message twin of cstore. These functions are for
7842: handlers to store a perl hash to a user's permanent data space in an
7843: easy manner, and to retrieve it again on another call. It is expected
7844: that a handler would use this once at the beginning to retrieve data,
7845: and then again once at the end to send only the new data back.
7846:
7847: The data is stored in the user's data directory on the user's
7848: homeserver under the ID of the course.
7849:
7850: The hash that is returned by restore will have all of the previous
7851: value for all of the elements of the hash.
7852:
7853: Example:
7854:
7855: #creating a hash
7856: my %hash;
7857: $hash{'foo'}='bar';
7858:
7859: #storing it
7860: &Apache::lonnet::cstore(\%hash);
7861:
7862: #changing a value
7863: $hash{'foo'}='notbar';
7864:
7865: #adding a new value
7866: $hash{'bar'}='foo';
7867: &Apache::lonnet::cstore(\%hash);
7868:
7869: #retrieving the hash
7870: my %history=&Apache::lonnet::restore();
7871:
7872: #print the hash
7873: foreach my $key (sort(keys(%history))) {
7874: print("\%history{$key} = $history{$key}");
7875: }
7876:
7877: Will print out:
7878:
7879: %history{1:foo} = bar
7880: %history{1:keys} = foo:timestamp
7881: %history{1:timestamp} = 990455579
7882: %history{2:bar} = foo
7883: %history{2:foo} = notbar
7884: %history{2:keys} = foo:bar:timestamp
7885: %history{2:timestamp} = 990455580
7886: %history{bar} = foo
7887: %history{foo} = notbar
7888: %history{timestamp} = 990455580
7889: %history{version} = 2
7890:
7891: Note that the special hash entries C<keys>, C<version> and
7892: C<timestamp> were added to the hash. C<version> will be equal to the
7893: total number of versions of the data that have been stored. The
7894: C<timestamp> attribute will be the UNIX time the hash was
7895: stored. C<keys> is available in every historical section to list which
7896: keys were added or changed at a specific historical revision of a
7897: hash.
7898:
7899: B<Warning>: do not store the hash that restore returns directly. This
7900: will cause a mess since it will restore the historical keys as if the
7901: were new keys. I.E. 1:foo will become 1:1:foo etc.
7902:
7903: Calling convention:
7904:
7905: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
7906: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
7907:
7908: For more detailed information, see lonnet specific documentation.
7909:
7910: =head1 RETURN MESSAGES
7911:
7912: =over 4
7913:
7914: =item * B<con_lost>: unable to contact remote host
7915:
7916: =item * B<con_delayed>: unable to contact remote host, message will be delivered
7917: when the connection is brought back up
7918:
7919: =item * B<con_failed>: unable to contact remote host and unable to save message
7920: for later delivery
7921:
7922: =item * B<error:>: an error a occured, a description of the error follows the :
7923:
7924: =item * B<no_such_host>: unable to fund a host associated with the user/domain
7925: that was requested
7926:
7927: =back
7928:
7929: =head1 PUBLIC SUBROUTINES
7930:
7931: =head2 Session Environment Functions
7932:
7933: =over 4
7934:
7935: =item *
7936: X<appenv()>
7937: B<appenv(%hash)>: the value of %hash is written to
7938: the user envirnoment file, and will be restored for each access this
7939: user makes during this session, also modifies the %env for the current
7940: process
7941:
7942: =item *
7943: X<delenv()>
7944: B<delenv($regexp)>: removes all items from the session
7945: environment file that matches the regular expression in $regexp. The
7946: values are also delted from the current processes %env.
7947:
7948: =item * get_env_multiple($name)
7949:
7950: gets $name from the %env hash, it seemlessly handles the cases where multiple
7951: values may be defined and end up as an array ref.
7952:
7953: returns an array of values
7954:
7955: =back
7956:
7957: =head2 User Information
7958:
7959: =over 4
7960:
7961: =item *
7962: X<queryauthenticate()>
7963: B<queryauthenticate($uname,$udom)>: try to determine user's current
7964: authentication scheme
7965:
7966: =item *
7967: X<authenticate()>
7968: B<authenticate($uname,$upass,$udom)>: try to
7969: authenticate user from domain's lib servers (first use the current
7970: one). C<$upass> should be the users password.
7971:
7972: =item *
7973: X<homeserver()>
7974: B<homeserver($uname,$udom)>: find the server which has
7975: the user's directory and files (there must be only one), this caches
7976: the answer, and also caches if there is a borken connection.
7977:
7978: =item *
7979: X<idget()>
7980: B<idget($udom,@ids)>: find the usernames behind a list of IDs
7981: (IDs are a unique resource in a domain, there must be only 1 ID per
7982: username, and only 1 username per ID in a specific domain) (returns
7983: hash: id=>name,id=>name)
7984:
7985: =item *
7986: X<idrget()>
7987: B<idrget($udom,@unames)>: find the IDs behind a list of
7988: usernames (returns hash: name=>id,name=>id)
7989:
7990: =item *
7991: X<idput()>
7992: B<idput($udom,%ids)>: store away a list of names and associated IDs
7993:
7994: =item *
7995: X<rolesinit()>
7996: B<rolesinit($udom,$username,$authhost)>: get user privileges
7997:
7998: =item *
7999: X<getsection()>
8000: B<getsection($udom,$uname,$cname)>: finds the section of student in the
8001: course $cname, return section name/number or '' for "not in course"
8002: and '-1' for "no section"
8003:
8004: =item *
8005: X<userenvironment()>
8006: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
8007: passed in @what from the requested user's environment, returns a hash
8008:
8009: =back
8010:
8011: =head2 User Roles
8012:
8013: =over 4
8014:
8015: =item *
8016:
8017: allowed($priv,$uri,$symb,$role) : check for a user privilege; returns codes for allowed actions
8018: F: full access
8019: U,I,K: authentication modes (cxx only)
8020: '': forbidden
8021: 1: user needs to choose course
8022: 2: browse allowed
8023: A: passphrase authentication needed
8024:
8025: =item *
8026:
8027: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
8028: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
8029: and course level
8030:
8031: =item *
8032:
8033: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
8034: explanation of a user role term
8035:
8036: =item *
8037:
8038: get_my_roles($uname,$udom,$types,$roles,$roledoms) : All arguments are
8039: optional. Returns a hash of a user's roles, with keys set to
8040: colon-sparated $uname,$udom,and $role, and value set to
8041: colon-separated start and end times for the role. If no username and
8042: domain are specified, will default to current user/domain. Types,
8043: roles, and roledoms are references to arrays, of role statuses
8044: (active, future or previous), roles (e.g., cc,in, st etc.) and domains
8045: of the roles which can be used to restrict the list if roles
8046: reported. If no array ref is provided for types, will default to
8047: return only active roles.
8048:
8049: =back
8050:
8051: =head2 User Modification
8052:
8053: =over 4
8054:
8055: =item *
8056:
8057: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
8058: user for the level given by URL. Optional start and end dates (leave empty
8059: string or zero for "no date")
8060:
8061: =item *
8062:
8063: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
8064: change a users, password, possible return values are: ok,
8065: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
8066: refused
8067:
8068: =item *
8069:
8070: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
8071:
8072: =item *
8073:
8074: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
8075: modify user
8076:
8077: =item *
8078:
8079: modifystudent
8080:
8081: modify a students enrollment and identification information.
8082: The course id is resolved based on the current users environment.
8083: This means the envoking user must be a course coordinator or otherwise
8084: associated with a course.
8085:
8086: This call is essentially a wrapper for lonnet::modifyuser and
8087: lonnet::modify_student_enrollment
8088:
8089: Inputs:
8090:
8091: =over 4
8092:
8093: =item B<$udom> Students loncapa domain
8094:
8095: =item B<$uname> Students loncapa login name
8096:
8097: =item B<$uid> Students id/student number
8098:
8099: =item B<$umode> Students authentication mode
8100:
8101: =item B<$upass> Students password
8102:
8103: =item B<$first> Students first name
8104:
8105: =item B<$middle> Students middle name
8106:
8107: =item B<$last> Students last name
8108:
8109: =item B<$gene> Students generation
8110:
8111: =item B<$usec> Students section in course
8112:
8113: =item B<$end> Unix time of the roles expiration
8114:
8115: =item B<$start> Unix time of the roles start date
8116:
8117: =item B<$forceid> If defined, allow $uid to be changed
8118:
8119: =item B<$desiredhome> server to use as home server for student
8120:
8121: =back
8122:
8123: =item *
8124:
8125: modify_student_enrollment
8126:
8127: Change a students enrollment status in a class. The environment variable
8128: 'role.request.course' must be defined for this function to proceed.
8129:
8130: Inputs:
8131:
8132: =over 4
8133:
8134: =item $udom, students domain
8135:
8136: =item $uname, students name
8137:
8138: =item $uid, students user id
8139:
8140: =item $first, students first name
8141:
8142: =item $middle
8143:
8144: =item $last
8145:
8146: =item $gene
8147:
8148: =item $usec
8149:
8150: =item $end
8151:
8152: =item $start
8153:
8154: =back
8155:
8156:
8157: =item *
8158:
8159: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
8160: custom role; give a custom role to a user for the level given by URL. Specify
8161: name and domain of role author, and role name
8162:
8163: =item *
8164:
8165: revokerole($udom,$uname,$url,$role) : revoke a role for url
8166:
8167: =item *
8168:
8169: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
8170:
8171: =back
8172:
8173: =head2 Course Infomation
8174:
8175: =over 4
8176:
8177: =item *
8178:
8179: coursedescription($courseid) : returns a hash of information about the
8180: specified course id, including all environment settings for the
8181: course, the description of the course will be in the hash under the
8182: key 'description'
8183:
8184: =item *
8185:
8186: resdata($name,$domain,$type,@which) : request for current parameter
8187: setting for a specific $type, where $type is either 'course' or 'user',
8188: @what should be a list of parameters to ask about. This routine caches
8189: answers for 5 minutes.
8190:
8191: =back
8192:
8193: =head2 Course Modification
8194:
8195: =over 4
8196:
8197: =item *
8198:
8199: writecoursepref($courseid,%prefs) : write preferences (environment
8200: database) for a course
8201:
8202: =item *
8203:
8204: createcourse($udom,$description,$url) : make/modify course
8205:
8206: =back
8207:
8208: =head2 Resource Subroutines
8209:
8210: =over 4
8211:
8212: =item *
8213:
8214: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
8215:
8216: =item *
8217:
8218: repcopy($filename) : subscribes to the requested file, and attempts to
8219: replicate from the owning library server, Might return
8220: 'unavailable', 'not_found', 'forbidden', 'ok', or
8221: 'bad_request', also attempts to grab the metadata for the
8222: resource. Expects the local filesystem pathname
8223: (/home/httpd/html/res/....)
8224:
8225: =back
8226:
8227: =head2 Resource Information
8228:
8229: =over 4
8230:
8231: =item *
8232:
8233: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
8234: a vairety of different possible values, $varname should be a request
8235: string, and the other parameters can be used to specify who and what
8236: one is asking about.
8237:
8238: Possible values for $varname are environment.lastname (or other item
8239: from the envirnment hash), user.name (or someother aspect about the
8240: user), resource.0.maxtries (or some other part and parameter of a
8241: resource)
8242:
8243: =item *
8244:
8245: directcondval($number) : get current value of a condition; reads from a state
8246: string
8247:
8248: =item *
8249:
8250: condval($condidx) : value of condition index based on state
8251:
8252: =item *
8253:
8254: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
8255: resource's metadata, $what should be either a specific key, or either
8256: 'keys' (to get a list of possible keys) or 'packages' to get a list of
8257: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
8258:
8259: this function automatically caches all requests
8260:
8261: =item *
8262:
8263: metadata_query($query,$custom,$customshow) : make a metadata query against the
8264: network of library servers; returns file handle of where SQL and regex results
8265: will be stored for query
8266:
8267: =item *
8268:
8269: symbread($filename) : return symbolic list entry (filename argument optional);
8270: returns the data handle
8271:
8272: =item *
8273:
8274: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
8275: a possible symb for the URL in $thisfn, and if is an encryypted
8276: resource that the user accessed using /enc/ returns a 1 on success, 0
8277: on failure, user must be in a course, as it assumes the existance of
8278: the course initial hash, and uses $env('request.course.id'}
8279:
8280:
8281: =item *
8282:
8283: symbclean($symb) : removes versions numbers from a symb, returns the
8284: cleaned symb
8285:
8286: =item *
8287:
8288: is_on_map($uri) : checks if the $uri is somewhere on the current
8289: course map, user must be in a course for it to work.
8290:
8291: =item *
8292:
8293: numval($salt) : return random seed value (addend for rndseed)
8294:
8295: =item *
8296:
8297: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
8298: a random seed, all arguments are optional, if they aren't sent it uses the
8299: environment to derive them. Note: if symb isn't sent and it can't get one
8300: from &symbread it will use the current time as its return value
8301:
8302: =item *
8303:
8304: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
8305: unfakeable, receipt
8306:
8307: =item *
8308:
8309: receipt() : API to ireceipt working off of env values; given out to users
8310:
8311: =item *
8312:
8313: countacc($url) : count the number of accesses to a given URL
8314:
8315: =item *
8316:
8317: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
8318:
8319: =item *
8320:
8321: checkin($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 $tcrsid)
8322:
8323: =item *
8324:
8325: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
8326:
8327: =item *
8328:
8329: devalidate($symb) : devalidate temporary spreadsheet calculations,
8330: forcing spreadsheet to reevaluate the resource scores next time.
8331:
8332: =back
8333:
8334: =head2 Storing/Retreiving Data
8335:
8336: =over 4
8337:
8338: =item *
8339:
8340: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
8341: for this url; hashref needs to be given and should be a \%hashname; the
8342: remaining args aren't required and if they aren't passed or are '' they will
8343: be derived from the env
8344:
8345: =item *
8346:
8347: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
8348: uses critical subroutine
8349:
8350: =item *
8351:
8352: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
8353: all args are optional
8354:
8355: =item *
8356:
8357: dumpstore($namespace,$udom,$uname,$regexp,$range) :
8358: dumps the complete (or key matching regexp) namespace into a hash
8359: ($udom, $uname, $regexp, $range are optional) for a namespace that is
8360: normally &store()ed into
8361:
8362: $range should be either an integer '100' (give me the first 100
8363: matching records)
8364: or be two integers sperated by a - with no spaces
8365: '30-50' (give me the 30th through the 50th matching
8366: records)
8367:
8368:
8369: =item *
8370:
8371: putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
8372: replaces a &store() version of data with a replacement set of data
8373: for a particular resource in a namespace passed in the $storehash hash
8374: reference
8375:
8376: =item *
8377:
8378: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
8379: works very similar to store/cstore, but all data is stored in a
8380: temporary location and can be reset using tmpreset, $storehash should
8381: be a hash reference, returns nothing on success
8382:
8383: =item *
8384:
8385: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
8386: similar to restore, but all data is stored in a temporary location and
8387: can be reset using tmpreset. Returns a hash of values on success,
8388: error string otherwise.
8389:
8390: =item *
8391:
8392: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
8393: deltes all keys for $symb form the temporary storage hash.
8394:
8395: =item *
8396:
8397: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
8398: reference filled in from namesp ($udom and $uname are optional)
8399:
8400: =item *
8401:
8402: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
8403: namesp ($udom and $uname are optional)
8404:
8405: =item *
8406:
8407: dump($namespace,$udom,$uname,$regexp,$range) :
8408: dumps the complete (or key matching regexp) namespace into a hash
8409: ($udom, $uname, $regexp, $range are optional)
8410:
8411: $range should be either an integer '100' (give me the first 100
8412: matching records)
8413: or be two integers sperated by a - with no spaces
8414: '30-50' (give me the 30th through the 50th matching
8415: records)
8416: =item *
8417:
8418: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
8419: $store can be a scalar, an array reference, or if the amount to be
8420: incremented is > 1, a hash reference.
8421:
8422: ($udom and $uname are optional)
8423:
8424: =item *
8425:
8426: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
8427: ($udom and $uname are optional)
8428:
8429: =item *
8430:
8431: cput($namespace,$storehash,$udom,$uname) : critical put
8432: ($udom and $uname are optional)
8433:
8434: =item *
8435:
8436: newput($namespace,$storehash,$udom,$uname) :
8437:
8438: Attempts to store the items in the $storehash, but only if they don't
8439: currently exist, if this succeeds you can be certain that you have
8440: successfully created a new key value pair in the $namespace db.
8441:
8442:
8443: Args:
8444: $namespace: name of database to store values to
8445: $storehash: hashref to store to the db
8446: $udom: (optional) domain of user containing the db
8447: $uname: (optional) name of user caontaining the db
8448:
8449: Returns:
8450: 'ok' -> succeeded in storing all keys of $storehash
8451: 'key_exists: <key>' -> failed to anything out of $storehash, as at
8452: least <key> already existed in the db (other
8453: requested keys may also already exist)
8454: 'error: <msg>' -> unable to tie the DB or other erorr occured
8455: 'con_lost' -> unable to contact request server
8456: 'refused' -> action was not allowed by remote machine
8457:
8458:
8459: =item *
8460:
8461: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
8462: reference filled in from namesp (encrypts the return communication)
8463: ($udom and $uname are optional)
8464:
8465: =item *
8466:
8467: log($udom,$name,$home,$message) : write to permanent log for user; use
8468: critical subroutine
8469:
8470: =item *
8471:
8472: get_dom($namespace,$storearr,$udomain) : returns hash with keys from array
8473: reference filled in from namespace found in domain level on primary domain server ($udomain is optional)
8474:
8475: =item *
8476:
8477: put_dom($namespace,$storehash,$udomain) : stores hash in namespace at domain level on primary domain server ($udomain is optional)
8478:
8479: =back
8480:
8481: =head2 Network Status Functions
8482:
8483: =over 4
8484:
8485: =item *
8486:
8487: dirlist($uri) : return directory list based on URI
8488:
8489: =item *
8490:
8491: spareserver() : find server with least workload from spare.tab
8492:
8493: =back
8494:
8495: =head2 Apache Request
8496:
8497: =over 4
8498:
8499: =item *
8500:
8501: ssi($url,%hash) : server side include, does a complete request cycle on url to
8502: localhost, posts hash
8503:
8504: =back
8505:
8506: =head2 Data to String to Data
8507:
8508: =over 4
8509:
8510: =item *
8511:
8512: hash2str(%hash) : convert a hash into a string complete with escaping and '='
8513: and '&' separators, supports elements that are arrayrefs and hashrefs
8514:
8515: =item *
8516:
8517: hashref2str($hashref) : convert a hashref into a string complete with
8518: escaping and '=' and '&' separators, supports elements that are
8519: arrayrefs and hashrefs
8520:
8521: =item *
8522:
8523: arrayref2str($arrayref) : convert an arrayref into a string complete
8524: with escaping and '&' separators, supports elements that are arrayrefs
8525: and hashrefs
8526:
8527: =item *
8528:
8529: str2hash($string) : convert string to hash using unescaping and
8530: splitting on '=' and '&', supports elements that are arrayrefs and
8531: hashrefs
8532:
8533: =item *
8534:
8535: str2array($string) : convert string to hash using unescaping and
8536: splitting on '&', supports elements that are arrayrefs and hashrefs
8537:
8538: =back
8539:
8540: =head2 Logging Routines
8541:
8542: =over 4
8543:
8544: These routines allow one to make log messages in the lonnet.log and
8545: lonnet.perm logfiles.
8546:
8547: =item *
8548:
8549: logtouch() : make sure the logfile, lonnet.log, exists
8550:
8551: =item *
8552:
8553: logthis() : append message to the normal lonnet.log file, it gets
8554: preiodically rolled over and deleted.
8555:
8556: =item *
8557:
8558: logperm() : append a permanent message to lonnet.perm.log, this log
8559: file never gets deleted by any automated portion of the system, only
8560: messages of critical importance should go in here.
8561:
8562: =back
8563:
8564: =head2 General File Helper Routines
8565:
8566: =over 4
8567:
8568: =item *
8569:
8570: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
8571: (a) files in /uploaded
8572: (i) If a local copy of the file exists -
8573: compares modification date of local copy with last-modified date for
8574: definitive version stored on home server for course. If local copy is
8575: stale, requests a new version from the home server and stores it.
8576: If the original has been removed from the home server, then local copy
8577: is unlinked.
8578: (ii) If local copy does not exist -
8579: requests the file from the home server and stores it.
8580:
8581: If $caller is 'uploadrep':
8582: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
8583: for request for files originally uploaded via DOCS.
8584: - returns 'ok' if fresh local copy now available, -1 otherwise.
8585:
8586: Otherwise:
8587: This indicates a call from the content generation phase of the request.
8588: - returns the entire contents of the file or -1.
8589:
8590: (b) files in /res
8591: - returns the entire contents of a file or -1;
8592: it properly subscribes to and replicates the file if neccessary.
8593:
8594:
8595: =item *
8596:
8597: stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
8598: reference
8599:
8600: returns either a stat() list of data about the file or an empty list
8601: if the file doesn't exist or couldn't find out about it (connection
8602: problems or user unknown)
8603:
8604: =item *
8605:
8606: filelocation($dir,$file) : returns file system location of a file
8607: based on URI; meant to be "fairly clean" absolute reference, $dir is a
8608: directory that relative $file lookups are to looked in ($dir of /a/dir
8609: and a file of ../bob will become /a/bob)
8610:
8611: =item *
8612:
8613: hreflocation($dir,$file) : returns file system location or a URL; same as
8614: filelocation except for hrefs
8615:
8616: =item *
8617:
8618: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
8619:
8620: =back
8621:
8622: =head2 Usererfile file routines (/uploaded*)
8623:
8624: =over 4
8625:
8626: =item *
8627:
8628: userfileupload(): main rotine for putting a file in a user or course's
8629: filespace, arguments are,
8630:
8631: formname - required - this is the name of the element in $env where the
8632: filename, and the contents of the file to create/modifed exist
8633: the filename is in $env{'form.'.$formname.'.filename'} and the
8634: contents of the file is located in $env{'form.'.$formname}
8635: coursedoc - if true, store the file in the course of the active role
8636: of the current user
8637: subdir - required - subdirectory to put the file in under ../userfiles/
8638: if undefined, it will be placed in "unknown"
8639:
8640: (This routine calls clean_filename() to remove any dangerous
8641: characters from the filename, and then calls finuserfileupload() to
8642: complete the transaction)
8643:
8644: returns either the url of the uploaded file (/uploaded/....) if successful
8645: and /adm/notfound.html if unsuccessful
8646:
8647: =item *
8648:
8649: clean_filename(): routine for cleaing a filename up for storage in
8650: userfile space, argument is:
8651:
8652: filename - proposed filename
8653:
8654: returns: the new clean filename
8655:
8656: =item *
8657:
8658: finishuserfileupload(): routine that creaes and sends the file to
8659: userspace, probably shouldn't be called directly
8660:
8661: docuname: username or courseid of destination for the file
8662: docudom: domain of user/course of destination for the file
8663: formname: same as for userfileupload()
8664: fname: filename (inculding subdirectories) for the file
8665:
8666: returns either the url of the uploaded file (/uploaded/....) if successful
8667: and /adm/notfound.html if unsuccessful
8668:
8669: =item *
8670:
8671: renameuserfile(): renames an existing userfile to a new name
8672:
8673: Args:
8674: docuname: username or courseid of destination for the file
8675: docudom: domain of user/course of destination for the file
8676: old: current file name (including any subdirs under userfiles)
8677: new: desired file name (including any subdirs under userfiles)
8678:
8679: =item *
8680:
8681: mkdiruserfile(): creates a directory is a userfiles dir
8682:
8683: Args:
8684: docuname: username or courseid of destination for the file
8685: docudom: domain of user/course of destination for the file
8686: dir: dir to create (including any subdirs under userfiles)
8687:
8688: =item *
8689:
8690: removeuserfile(): removes a file that exists in userfiles
8691:
8692: Args:
8693: docuname: username or courseid of destination for the file
8694: docudom: domain of user/course of destination for the file
8695: fname: filname to delete (including any subdirs under userfiles)
8696:
8697: =item *
8698:
8699: removeuploadedurl(): convience function for removeuserfile()
8700:
8701: Args:
8702: url: a full /uploaded/... url to delete
8703:
8704: =item *
8705:
8706: get_portfile_permissions():
8707: Args:
8708: domain: domain of user or course contain the portfolio files
8709: user: name of user or num of course contain the portfolio files
8710: Returns:
8711: hashref of a dump of the proper file_permissions.db
8712:
8713:
8714: =item *
8715:
8716: get_access_controls():
8717:
8718: Args:
8719: current_permissions: the hash ref returned from get_portfile_permissions()
8720: group: (optional) the group you want the files associated with
8721: file: (optional) the file you want access info on
8722:
8723: Returns:
8724: a hash (keys are file names) of hashes containing
8725: keys are: path to file/file_name\0uniqueID:scope_end_start (see below)
8726: values are XML containing access control settings (see below)
8727:
8728: Internal notes:
8729:
8730: access controls are stored in file_permissions.db as key=value pairs.
8731: key -> path to file/file_name\0uniqueID:scope_end_start
8732: where scope -> public,guest,course,group,domains or users.
8733: end -> UNIX time for end of access (0 -> no end date)
8734: start -> UNIX time for start of access
8735:
8736: value -> XML description of access control
8737: <scope type=""> (type =1 of: public,guest,course,group,domains,users">
8738: <start></start>
8739: <end></end>
8740:
8741: <password></password> for scope type = guest
8742:
8743: <domain></domain> for scope type = course or group
8744: <number></number>
8745: <roles id="">
8746: <role></role>
8747: <access></access>
8748: <section></section>
8749: <group></group>
8750: </roles>
8751:
8752: <dom></dom> for scope type = domains
8753:
8754: <users> for scope type = users
8755: <user>
8756: <uname></uname>
8757: <udom></udom>
8758: </user>
8759: </users>
8760: </scope>
8761:
8762: Access data is also aggregated for each file in an additional key=value pair:
8763: key -> path to file/file_name\0accesscontrol
8764: value -> reference to hash
8765: hash contains key = value pairs
8766: where key = uniqueID:scope_end_start
8767: value = UNIX time record was last updated
8768:
8769: Used to improve speed of look-ups of access controls for each file.
8770:
8771: Locks on files (resulting from submission of portfolio file to a homework problem stored in array of arrays.
8772:
8773: modify_access_controls():
8774:
8775: Modifies access controls for a portfolio file
8776: Args
8777: 1. file name
8778: 2. reference to hash of required changes,
8779: 3. domain
8780: 4. username
8781: where domain,username are the domain of the portfolio owner
8782: (either a user or a course)
8783:
8784: Returns:
8785: 1. result of additions or updates ('ok' or 'error', with error message).
8786: 2. result of deletions ('ok' or 'error', with error message).
8787: 3. reference to hash of any new or updated access controls.
8788: 4. reference to hash used to map incoming IDs to uniqueIDs assigned to control.
8789: key = integer (inbound ID)
8790: value = uniqueID
8791:
8792: =back
8793:
8794: =head2 HTTP Helper Routines
8795:
8796: =over 4
8797:
8798: =item *
8799:
8800: escape() : unpack non-word characters into CGI-compatible hex codes
8801:
8802: =item *
8803:
8804: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
8805:
8806: =back
8807:
8808: =head1 PRIVATE SUBROUTINES
8809:
8810: =head2 Underlying communication routines (Shouldn't call)
8811:
8812: =over 4
8813:
8814: =item *
8815:
8816: subreply() : tries to pass a message to lonc, returns con_lost if incapable
8817:
8818: =item *
8819:
8820: reply() : uses subreply to send a message to remote machine, logs all failures
8821:
8822: =item *
8823:
8824: critical() : passes a critical message to another server; if cannot
8825: get through then place message in connection buffer directory and
8826: returns con_delayed, if incapable of saving message, returns
8827: con_failed
8828:
8829: =item *
8830:
8831: reconlonc() : tries to reconnect lonc client processes.
8832:
8833: =back
8834:
8835: =head2 Resource Access Logging
8836:
8837: =over 4
8838:
8839: =item *
8840:
8841: flushcourselogs() : flush (save) buffer logs and access logs
8842:
8843: =item *
8844:
8845: courselog($what) : save message for course in hash
8846:
8847: =item *
8848:
8849: courseacclog($what) : save message for course using &courselog(). Perform
8850: special processing for specific resource types (problems, exams, quizzes, etc).
8851:
8852: =item *
8853:
8854: goodbye() : flush course logs and log shutting down; it is called in srm.conf
8855: as a PerlChildExitHandler
8856:
8857: =back
8858:
8859: =head2 Other
8860:
8861: =over 4
8862:
8863: =item *
8864:
8865: symblist($mapname,%newhash) : update symbolic storage links
8866:
8867: =back
8868:
8869: =cut
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