1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.849 2007/03/17 04:11:51 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 %spareid
39: %pr %prp $memcache %packagetab
40: %courselogs %accesshash %userrolehash %domainrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf %coursetypebuf
42: $tmpdir $_64bit %env);
43:
44: use IO::Socket;
45: use GDBM_File;
46: use HTML::LCParser;
47: use HTML::Parser;
48: use Fcntl qw(:flock);
49: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
50: use Time::HiRes qw( gettimeofday tv_interval );
51: use Cache::Memcached;
52: use Digest::MD5;
53: use Math::Random;
54: use LONCAPA qw(:DEFAULT :match);
55: use LONCAPA::Configuration;
56:
57: my $readit;
58: my $max_connection_retries = 10; # Or some such value.
59:
60: require Exporter;
61:
62: our @ISA = qw (Exporter);
63: our @EXPORT = qw(%env);
64:
65: =pod
66:
67: =head1 Package Variables
68:
69: These are largely undocumented, so if you decipher one please note it here.
70:
71: =over 4
72:
73: =item $processmarker
74:
75: Contains the time this process was started and this servers host id.
76:
77: =item $dumpcount
78:
79: Counts the number of times a message log flush has been attempted (regardless
80: of success) by this process. Used as part of the filename when messages are
81: delayed.
82:
83: =back
84:
85: =cut
86:
87:
88: # --------------------------------------------------------------------- Logging
89: {
90: my $logid;
91: sub instructor_log {
92: my ($hash_name,$storehash,$delflag,$uname,$udom)=@_;
93: $logid++;
94: my $id=time().'00000'.$$.'00000'.$logid;
95: return &Apache::lonnet::put('nohist_'.$hash_name,
96: { $id => {
97: 'exe_uname' => $env{'user.name'},
98: 'exe_udom' => $env{'user.domain'},
99: 'exe_time' => time(),
100: 'exe_ip' => $ENV{'REMOTE_ADDR'},
101: 'delflag' => $delflag,
102: 'logentry' => $storehash,
103: 'uname' => $uname,
104: 'udom' => $udom,
105: }
106: },
107: $env{'course.'.$env{'request.course.id'}.'.domain'},
108: $env{'course.'.$env{'request.course.id'}.'.num'}
109: );
110: }
111: }
112:
113: sub logtouch {
114: my $execdir=$perlvar{'lonDaemons'};
115: unless (-e "$execdir/logs/lonnet.log") {
116: open(my $fh,">>$execdir/logs/lonnet.log");
117: close $fh;
118: }
119: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
120: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
121: }
122:
123: sub logthis {
124: my $message=shift;
125: my $execdir=$perlvar{'lonDaemons'};
126: my $now=time;
127: my $local=localtime($now);
128: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
129: print $fh "$local ($$): $message\n";
130: close($fh);
131: }
132: return 1;
133: }
134:
135: sub logperm {
136: my $message=shift;
137: my $execdir=$perlvar{'lonDaemons'};
138: my $now=time;
139: my $local=localtime($now);
140: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
141: print $fh "$now:$message:$local\n";
142: close($fh);
143: }
144: return 1;
145: }
146:
147: # -------------------------------------------------- Non-critical communication
148: sub subreply {
149: my ($cmd,$server)=@_;
150: my $peerfile="$perlvar{'lonSockDir'}/".&hostname($server);
151: #
152: # With loncnew process trimming, there's a timing hole between lonc server
153: # process exit and the master server picking up the listen on the AF_UNIX
154: # socket. In that time interval, a lock file will exist:
155:
156: my $lockfile=$peerfile.".lock";
157: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
158: sleep(1);
159: }
160: # At this point, either a loncnew parent is listening or an old lonc
161: # or loncnew child is listening so we can connect or everything's dead.
162: #
163: # We'll give the connection a few tries before abandoning it. If
164: # connection is not possible, we'll con_lost back to the client.
165: #
166: my $client;
167: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
168: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
169: Type => SOCK_STREAM,
170: Timeout => 10);
171: if($client) {
172: last; # Connected!
173: }
174: sleep(1); # Try again later if failed connection.
175: }
176: my $answer;
177: if ($client) {
178: print $client "sethost:$server:$cmd\n";
179: $answer=<$client>;
180: if (!$answer) { $answer="con_lost"; }
181: chomp($answer);
182: } else {
183: $answer = 'con_lost'; # Failed connection.
184: }
185: return $answer;
186: }
187:
188: sub reply {
189: my ($cmd,$server)=@_;
190: unless (defined(&hostname($server))) { return 'no_such_host'; }
191: my $answer=subreply($cmd,$server);
192: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
193: &logthis("<font color=\"blue\">WARNING:".
194: " $cmd to $server returned $answer</font>");
195: }
196: return $answer;
197: }
198:
199: # ----------------------------------------------------------- Send USR1 to lonc
200:
201: sub reconlonc {
202: &logthis("Trying to reconnect lonc");
203: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
204: if (open(my $fh,"<$loncfile")) {
205: my $loncpid=<$fh>;
206: chomp($loncpid);
207: if (kill 0 => $loncpid) {
208: &logthis("lonc at pid $loncpid responding, sending USR1");
209: kill USR1 => $loncpid;
210: sleep 1;
211: } else {
212: &logthis(
213: "<font color=\"blue\">WARNING:".
214: " lonc at pid $loncpid not responding, giving up</font>");
215: }
216: } else {
217: &logthis('<font color="blue">WARNING: lonc not running, giving up</font>');
218: }
219: }
220:
221: # ------------------------------------------------------ Critical communication
222:
223: sub critical {
224: my ($cmd,$server)=@_;
225: unless (&hostname($server)) {
226: &logthis("<font color=\"blue\">WARNING:".
227: " Critical message to unknown server ($server)</font>");
228: return 'no_such_host';
229: }
230: my $answer=reply($cmd,$server);
231: if ($answer eq 'con_lost') {
232: &reconlonc("$perlvar{'lonSockDir'}/$server");
233: my $answer=reply($cmd,$server);
234: if ($answer eq 'con_lost') {
235: my $now=time;
236: my $middlename=$cmd;
237: $middlename=substr($middlename,0,16);
238: $middlename=~s/\W//g;
239: my $dfilename=
240: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
241: $dumpcount++;
242: {
243: my $dfh;
244: if (open($dfh,">$dfilename")) {
245: print $dfh "$cmd\n";
246: close($dfh);
247: }
248: }
249: sleep 2;
250: my $wcmd='';
251: {
252: my $dfh;
253: if (open($dfh,"<$dfilename")) {
254: $wcmd=<$dfh>;
255: close($dfh);
256: }
257: }
258: chomp($wcmd);
259: if ($wcmd eq $cmd) {
260: &logthis("<font color=\"blue\">WARNING: ".
261: "Connection buffer $dfilename: $cmd</font>");
262: &logperm("D:$server:$cmd");
263: return 'con_delayed';
264: } else {
265: &logthis("<font color=\"red\">CRITICAL:"
266: ." Critical connection failed: $server $cmd</font>");
267: &logperm("F:$server:$cmd");
268: return 'con_failed';
269: }
270: }
271: }
272: return $answer;
273: }
274:
275: # ------------------------------------------- check if return value is an error
276:
277: sub error {
278: my ($result) = @_;
279: if ($result =~ /^(con_lost|no_such_host|error: (\d+) (.*))/) {
280: if ($2 == 2) { return undef; }
281: return $1;
282: }
283: return undef;
284: }
285:
286: sub convert_and_load_session_env {
287: my ($lonidsdir,$handle)=@_;
288: my @profile;
289: {
290: open(my $idf,"$lonidsdir/$handle.id");
291: flock($idf,LOCK_SH);
292: @profile=<$idf>;
293: close($idf);
294: }
295: my %temp_env;
296: foreach my $line (@profile) {
297: if ($line !~ m/=/) {
298: return 0;
299: }
300: chomp($line);
301: my ($envname,$envvalue)=split(/=/,$line,2);
302: $temp_env{&unescape($envname)} = &unescape($envvalue);
303: }
304: unlink("$lonidsdir/$handle.id");
305: if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",&GDBM_WRCREAT(),
306: 0640)) {
307: %disk_env = %temp_env;
308: @env{keys(%temp_env)} = @disk_env{keys(%temp_env)};
309: untie(%disk_env);
310: }
311: return 1;
312: }
313:
314: # ------------------------------------------- Transfer profile into environment
315: my $env_loaded;
316: sub transfer_profile_to_env {
317: my ($lonidsdir,$handle,$force_transfer) = @_;
318: if (!$force_transfer && $env_loaded) { return; }
319:
320: if (!defined($lonidsdir)) {
321: $lonidsdir = $perlvar{'lonIDsDir'};
322: }
323: if (!defined($handle)) {
324: ($handle) = ($env{'user.environment'} =~m|/([^/]+)\.id$| );
325: }
326:
327: my $convert;
328: {
329: open(my $idf,"$lonidsdir/$handle.id");
330: flock($idf,LOCK_SH);
331: if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",
332: &GDBM_READER(),0640)) {
333: @env{keys(%disk_env)} = @disk_env{keys(%disk_env)};
334: untie(%disk_env);
335: } else {
336: $convert = 1;
337: }
338: }
339: if ($convert) {
340: if (!&convert_and_load_session_env($lonidsdir,$handle)) {
341: &logthis("Failed to load session, or convert session.");
342: }
343: }
344:
345: my %remove;
346: while ( my $envname = each(%env) ) {
347: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
348: if ($time < time-300) {
349: $remove{$key}++;
350: }
351: }
352: }
353:
354: $env{'user.environment'} = "$lonidsdir/$handle.id";
355: $env_loaded=1;
356: foreach my $expired_key (keys(%remove)) {
357: &delenv($expired_key);
358: }
359: }
360:
361: sub timed_flock {
362: my ($file,$lock_type) = @_;
363: my $failed=0;
364: eval {
365: local $SIG{__DIE__}='DEFAULT';
366: local $SIG{ALRM}=sub {
367: $failed=1;
368: die("failed lock");
369: };
370: alarm(13);
371: flock($file,$lock_type);
372: alarm(0);
373: };
374: if ($failed) {
375: return undef;
376: } else {
377: return 1;
378: }
379: }
380:
381: # ---------------------------------------------------------- Append Environment
382:
383: sub appenv {
384: my %newenv=@_;
385: foreach my $key (keys(%newenv)) {
386: if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
387: &logthis("<font color=\"blue\">WARNING: ".
388: "Attempt to modify environment ".$key." to ".$newenv{$key}
389: .'</font>');
390: delete($newenv{$key});
391: } else {
392: $env{$key}=$newenv{$key};
393: }
394: }
395: open(my $env_file,$env{'user.environment'});
396: if (&timed_flock($env_file,LOCK_EX)
397: &&
398: tie(my %disk_env,'GDBM_File',$env{'user.environment'},
399: (&GDBM_WRITER()|&GDBM_NOLOCK()),0640)) {
400: while (my ($key,$value) = each(%newenv)) {
401: $disk_env{$key} = $value;
402: }
403: untie(%disk_env);
404: }
405: return 'ok';
406: }
407: # ----------------------------------------------------- Delete from Environment
408:
409: sub delenv {
410: my $delthis=shift;
411: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
412: &logthis("<font color=\"blue\">WARNING: ".
413: "Attempt to delete from environment ".$delthis);
414: return 'error';
415: }
416: open(my $env_file,$env{'user.environment'});
417: if (&timed_flock($env_file,LOCK_EX)
418: &&
419: tie(my %disk_env,'GDBM_File',$env{'user.environment'},
420: (&GDBM_WRITER()|&GDBM_NOLOCK()),0640)) {
421: foreach my $key (keys(%disk_env)) {
422: if ($key=~/^$delthis/) {
423: delete($env{$key});
424: delete($disk_env{$key});
425: }
426: }
427: untie(%disk_env);
428: }
429: return 'ok';
430: }
431:
432: sub get_env_multiple {
433: my ($name) = @_;
434: my @values;
435: if (defined($env{$name})) {
436: # exists is it an array
437: if (ref($env{$name})) {
438: @values=@{ $env{$name} };
439: } else {
440: $values[0]=$env{$name};
441: }
442: }
443: return(@values);
444: }
445:
446: # ------------------------------------------ Find out current server userload
447: # there is a copy in lond
448: sub userload {
449: my $numusers=0;
450: {
451: opendir(LONIDS,$perlvar{'lonIDsDir'});
452: my $filename;
453: my $curtime=time;
454: while ($filename=readdir(LONIDS)) {
455: if ($filename eq '.' || $filename eq '..') {next;}
456: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
457: if ($curtime-$mtime < 1800) { $numusers++; }
458: }
459: closedir(LONIDS);
460: }
461: my $userloadpercent=0;
462: my $maxuserload=$perlvar{'lonUserLoadLim'};
463: if ($maxuserload) {
464: $userloadpercent=100*$numusers/$maxuserload;
465: }
466: $userloadpercent=sprintf("%.2f",$userloadpercent);
467: return $userloadpercent;
468: }
469:
470: # ------------------------------------------ Fight off request when overloaded
471:
472: sub overloaderror {
473: my ($r,$checkserver)=@_;
474: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
475: my $loadavg;
476: if ($checkserver eq $perlvar{'lonHostID'}) {
477: open(my $loadfile,'/proc/loadavg');
478: $loadavg=<$loadfile>;
479: $loadavg =~ s/\s.*//g;
480: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
481: close($loadfile);
482: } else {
483: $loadavg=&reply('load',$checkserver);
484: }
485: my $overload=$loadavg-100;
486: if ($overload>0) {
487: $r->err_headers_out->{'Retry-After'}=$overload;
488: $r->log_error('Overload of '.$overload.' on '.$checkserver);
489: return 413;
490: }
491: return '';
492: }
493:
494: # ------------------------------ Find server with least workload from spare.tab
495:
496: sub spareserver {
497: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
498: my $spare_server;
499: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
500: my $lowest_load=($loadpercent > $userloadpercent) ? $loadpercent
501: : $userloadpercent;
502:
503: foreach my $try_server (@{ $spareid{'primary'} }) {
504: ($spare_server, $lowest_load) =
505: &compare_server_load($try_server, $spare_server, $lowest_load);
506: }
507:
508: my $found_server = ($spare_server ne '' && $lowest_load < 100);
509:
510: if (!$found_server) {
511: foreach my $try_server (@{ $spareid{'default'} }) {
512: ($spare_server, $lowest_load) =
513: &compare_server_load($try_server, $spare_server, $lowest_load);
514: }
515: }
516:
517: if (!$want_server_name) {
518: $spare_server="http://".&hostname($spare_server);
519: }
520: return $spare_server;
521: }
522:
523: sub compare_server_load {
524: my ($try_server, $spare_server, $lowest_load) = @_;
525:
526: my $loadans = &reply('load', $try_server);
527: my $userloadans = &reply('userload',$try_server);
528:
529: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
530: next; #didn't get a number from the server
531: }
532:
533: my $load;
534: if ($loadans =~ /\d/) {
535: if ($userloadans =~ /\d/) {
536: #both are numbers, pick the bigger one
537: $load = ($loadans > $userloadans) ? $loadans
538: : $userloadans;
539: } else {
540: $load = $loadans;
541: }
542: } else {
543: $load = $userloadans;
544: }
545:
546: if (($load =~ /\d/) && ($load < $lowest_load)) {
547: $spare_server = $try_server;
548: $lowest_load = $load;
549: }
550: return ($spare_server,$lowest_load);
551: }
552: # --------------------------------------------- Try to change a user's password
553:
554: sub changepass {
555: my ($uname,$udom,$currentpass,$newpass,$server,$context)=@_;
556: $currentpass = &escape($currentpass);
557: $newpass = &escape($newpass);
558: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass:$context",
559: $server);
560: if (! $answer) {
561: &logthis("No reply on password change request to $server ".
562: "by $uname in domain $udom.");
563: } elsif ($answer =~ "^ok") {
564: &logthis("$uname in $udom successfully changed their password ".
565: "on $server.");
566: } elsif ($answer =~ "^pwchange_failure") {
567: &logthis("$uname in $udom was unable to change their password ".
568: "on $server. The action was blocked by either lcpasswd ".
569: "or pwchange");
570: } elsif ($answer =~ "^non_authorized") {
571: &logthis("$uname in $udom did not get their password correct when ".
572: "attempting to change it on $server.");
573: } elsif ($answer =~ "^auth_mode_error") {
574: &logthis("$uname in $udom attempted to change their password despite ".
575: "not being locally or internally authenticated on $server.");
576: } elsif ($answer =~ "^unknown_user") {
577: &logthis("$uname in $udom attempted to change their password ".
578: "on $server but were unable to because $server is not ".
579: "their home server.");
580: } elsif ($answer =~ "^refused") {
581: &logthis("$server refused to change $uname in $udom password because ".
582: "it was sent an unencrypted request to change the password.");
583: }
584: return $answer;
585: }
586:
587: # ----------------------- Try to determine user's current authentication scheme
588:
589: sub queryauthenticate {
590: my ($uname,$udom)=@_;
591: my $uhome=&homeserver($uname,$udom);
592: if (!$uhome) {
593: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
594: return 'no_host';
595: }
596: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
597: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
598: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
599: }
600: return $answer;
601: }
602:
603: # --------- Try to authenticate user from domain's lib servers (first this one)
604:
605: sub authenticate {
606: my ($uname,$upass,$udom)=@_;
607: $upass=&escape($upass);
608: $uname= &LONCAPA::clean_username($uname);
609: my $uhome=&homeserver($uname,$udom,1);
610: if ((!$uhome) || ($uhome eq 'no_host')) {
611: # Maybe the machine was offline and only re-appeared again recently?
612: &reconlonc();
613: # One more
614: my $uhome=&homeserver($uname,$udom,1);
615: if ((!$uhome) || ($uhome eq 'no_host')) {
616: &logthis("User $uname at $udom is unknown in authenticate");
617: }
618: return 'no_host';
619: }
620: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
621: if ($answer eq 'authorized') {
622: &logthis("User $uname at $udom authorized by $uhome");
623: return $uhome;
624: }
625: if ($answer eq 'non_authorized') {
626: &logthis("User $uname at $udom rejected by $uhome");
627: return 'no_host';
628: }
629: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
630: return 'no_host';
631: }
632:
633: # ---------------------- Find the homebase for a user from domain's lib servers
634:
635: my %homecache;
636: sub homeserver {
637: my ($uname,$udom,$ignoreBadCache)=@_;
638: my $index="$uname:$udom";
639:
640: if (exists($homecache{$index})) { return $homecache{$index}; }
641:
642: my %servers = &get_servers($udom,'library');
643: foreach my $tryserver (keys(%servers)) {
644: next if ($ignoreBadCache ne 'true' &&
645: exists($badServerCache{$tryserver}));
646:
647: my $answer=reply("home:$udom:$uname",$tryserver);
648: if ($answer eq 'found') {
649: delete($badServerCache{$tryserver});
650: return $homecache{$index}=$tryserver;
651: } elsif ($answer eq 'no_host') {
652: $badServerCache{$tryserver}=1;
653: }
654: }
655: return 'no_host';
656: }
657:
658: # ------------------------------------- Find the usernames behind a list of IDs
659:
660: sub idget {
661: my ($udom,@ids)=@_;
662: my %returnhash=();
663:
664: my %servers = &get_servers($udom,'library');
665: foreach my $tryserver (keys(%servers)) {
666: my $idlist=join('&',@ids);
667: $idlist=~tr/A-Z/a-z/;
668: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
669: my @answer=();
670: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
671: @answer=split(/\&/,$reply);
672: } ;
673: my $i;
674: for ($i=0;$i<=$#ids;$i++) {
675: if ($answer[$i]) {
676: $returnhash{$ids[$i]}=$answer[$i];
677: }
678: }
679: }
680: return %returnhash;
681: }
682:
683: # ------------------------------------- Find the IDs behind a list of usernames
684:
685: sub idrget {
686: my ($udom,@unames)=@_;
687: my %returnhash=();
688: foreach my $uname (@unames) {
689: $returnhash{$uname}=(&userenvironment($udom,$uname,'id'))[1];
690: }
691: return %returnhash;
692: }
693:
694: # ------------------------------- Store away a list of names and associated IDs
695:
696: sub idput {
697: my ($udom,%ids)=@_;
698: my %servers=();
699: foreach my $uname (keys(%ids)) {
700: &cput('environment',{'id'=>$ids{$uname}},$udom,$uname);
701: my $uhom=&homeserver($uname,$udom);
702: if ($uhom ne 'no_host') {
703: my $id=&escape($ids{$uname});
704: $id=~tr/A-Z/a-z/;
705: my $esc_unam=&escape($uname);
706: if ($servers{$uhom}) {
707: $servers{$uhom}.='&'.$id.'='.$esc_unam;
708: } else {
709: $servers{$uhom}=$id.'='.$esc_unam;
710: }
711: }
712: }
713: foreach my $server (keys(%servers)) {
714: &critical('idput:'.$udom.':'.$servers{$server},$server);
715: }
716: }
717:
718: # ------------------------------------------- get items from domain db files
719:
720: sub get_dom {
721: my ($namespace,$storearr,$udom)=@_;
722: my $items='';
723: foreach my $item (@$storearr) {
724: $items.=&escape($item).'&';
725: }
726: $items=~s/\&$//;
727: if (!$udom) { $udom=$env{'user.domain'}; }
728: if (defined(&domain($udom,'primary'))) {
729: my $uhome=&domain($udom,'primary');
730: my $rep=&reply("getdom:$udom:$namespace:$items",$uhome);
731: my @pairs=split(/\&/,$rep);
732: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
733: return @pairs;
734: }
735: my %returnhash=();
736: my $i=0;
737: foreach my $item (@$storearr) {
738: $returnhash{$item}=&thaw_unescape($pairs[$i]);
739: $i++;
740: }
741: return %returnhash;
742: } else {
743: &logthis("get_dom failed - no primary domain server for $udom");
744: }
745: }
746:
747: # -------------------------------------------- put items in domain db files
748:
749: sub put_dom {
750: my ($namespace,$storehash,$udom)=@_;
751: if (!$udom) { $udom=$env{'user.domain'}; }
752: if (defined(&domain($udom,'primary'))) {
753: my $uhome=&domain($udom,'primary');
754: my $items='';
755: foreach my $item (keys(%$storehash)) {
756: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
757: }
758: $items=~s/\&$//;
759: return &reply("putdom:$udom:$namespace:$items",$uhome);
760: } else {
761: &logthis("put_dom failed - no primary domain server for $udom");
762: }
763: }
764:
765: sub retrieve_inst_usertypes {
766: my ($udom) = @_;
767: my (%returnhash,@order);
768: if (defined(&domain($udom,'primary'))) {
769: my $uhome=&domain($udom,'primary');
770: my $rep=&reply("inst_usertypes:$udom",$uhome);
771: my ($hashitems,$orderitems) = split(/:/,$rep);
772: my @pairs=split(/\&/,$hashitems);
773: foreach my $item (@pairs) {
774: my ($key,$value)=split(/=/,$item,2);
775: $key = &unescape($key);
776: next if ($key =~ /^error: 2 /);
777: $returnhash{$key}=&thaw_unescape($value);
778: }
779: my @esc_order = split(/\&/,$orderitems);
780: foreach my $item (@esc_order) {
781: push(@order,&unescape($item));
782: }
783: } else {
784: &logthis("get_dom failed - no primary domain server for $udom");
785: }
786: return (\%returnhash,\@order);
787: }
788:
789: # --------------------------------------------------- Assign a key to a student
790:
791: sub assign_access_key {
792: #
793: # a valid key looks like uname:udom#comments
794: # comments are being appended
795: #
796: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
797: $kdom=
798: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
799: $knum=
800: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
801: $cdom=
802: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
803: $cnum=
804: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
805: $udom=$env{'user.name'} unless (defined($udom));
806: $uname=$env{'user.domain'} unless (defined($uname));
807: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
808: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
809: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
810: # assigned to this person
811: # - this should not happen,
812: # unless something went wrong
813: # the first time around
814: # ready to assign
815: $logentry=$1.'; '.$logentry;
816: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
817: $kdom,$knum) eq 'ok') {
818: # key now belongs to user
819: my $envkey='key.'.$cdom.'_'.$cnum;
820: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
821: &appenv('environment.'.$envkey => $ckey);
822: return 'ok';
823: } else {
824: return
825: 'error: Count not permanently assign key, will need to be re-entered later.';
826: }
827: } else {
828: return 'error: Could not assign key, try again later.';
829: }
830: } elsif (!$existing{$ckey}) {
831: # the key does not exist
832: return 'error: The key does not exist';
833: } else {
834: # the key is somebody else's
835: return 'error: The key is already in use';
836: }
837: }
838:
839: # ------------------------------------------ put an additional comment on a key
840:
841: sub comment_access_key {
842: #
843: # a valid key looks like uname:udom#comments
844: # comments are being appended
845: #
846: my ($ckey,$cdom,$cnum,$logentry)=@_;
847: $cdom=
848: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
849: $cnum=
850: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
851: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
852: if ($existing{$ckey}) {
853: $existing{$ckey}.='; '.$logentry;
854: # ready to assign
855: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
856: $cdom,$cnum) eq 'ok') {
857: return 'ok';
858: } else {
859: return 'error: Count not store comment.';
860: }
861: } else {
862: # the key does not exist
863: return 'error: The key does not exist';
864: }
865: }
866:
867: # ------------------------------------------------------ Generate a set of keys
868:
869: sub generate_access_keys {
870: my ($number,$cdom,$cnum,$logentry)=@_;
871: $cdom=
872: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
873: $cnum=
874: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
875: unless (&allowed('mky',$cdom)) { return 0; }
876: unless (($cdom) && ($cnum)) { return 0; }
877: if ($number>10000) { return 0; }
878: sleep(2); # make sure don't get same seed twice
879: srand(time()^($$+($$<<15))); # from "Programming Perl"
880: my $total=0;
881: for (my $i=1;$i<=$number;$i++) {
882: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
883: sprintf("%lx",int(100000*rand)).'-'.
884: sprintf("%lx",int(100000*rand));
885: $newkey=~s/1/g/g; # folks mix up 1 and l
886: $newkey=~s/0/h/g; # and also 0 and O
887: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
888: if ($existing{$newkey}) {
889: $i--;
890: } else {
891: if (&put('accesskeys',
892: { $newkey => '# generated '.localtime().
893: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
894: '; '.$logentry },
895: $cdom,$cnum) eq 'ok') {
896: $total++;
897: }
898: }
899: }
900: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
901: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
902: return $total;
903: }
904:
905: # ------------------------------------------------------- Validate an accesskey
906:
907: sub validate_access_key {
908: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
909: $cdom=
910: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
911: $cnum=
912: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
913: $udom=$env{'user.domain'} unless (defined($udom));
914: $uname=$env{'user.name'} unless (defined($uname));
915: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
916: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
917: }
918:
919: # ------------------------------------- Find the section of student in a course
920: sub devalidate_getsection_cache {
921: my ($udom,$unam,$courseid)=@_;
922: my $hashid="$udom:$unam:$courseid";
923: &devalidate_cache_new('getsection',$hashid);
924: }
925:
926: sub courseid_to_courseurl {
927: my ($courseid) = @_;
928: #already url style courseid
929: return $courseid if ($courseid =~ m{^/});
930:
931: if (exists($env{'course.'.$courseid.'.num'})) {
932: my $cnum = $env{'course.'.$courseid.'.num'};
933: my $cdom = $env{'course.'.$courseid.'.domain'};
934: return "/$cdom/$cnum";
935: }
936:
937: my %courseinfo=&Apache::lonnet::coursedescription($courseid);
938: if (exists($courseinfo{'num'})) {
939: return "/$courseinfo{'domain'}/$courseinfo{'num'}";
940: }
941:
942: return undef;
943: }
944:
945: sub getsection {
946: my ($udom,$unam,$courseid)=@_;
947: my $cachetime=1800;
948:
949: my $hashid="$udom:$unam:$courseid";
950: my ($result,$cached)=&is_cached_new('getsection',$hashid);
951: if (defined($cached)) { return $result; }
952:
953: my %Pending;
954: my %Expired;
955: #
956: # Each role can either have not started yet (pending), be active,
957: # or have expired.
958: #
959: # If there is an active role, we are done.
960: #
961: # If there is more than one role which has not started yet,
962: # choose the one which will start sooner
963: # If there is one role which has not started yet, return it.
964: #
965: # If there is more than one expired role, choose the one which ended last.
966: # If there is a role which has expired, return it.
967: #
968: $courseid = &courseid_to_courseurl($courseid);
969: my %roleshash = &dump('roles',$udom,$unam,$courseid);
970: foreach my $key (keys(%roleshash)) {
971: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
972: my $section=$1;
973: if ($key eq $courseid.'_st') { $section=''; }
974: my ($dummy,$end,$start)=split(/\_/,&unescape($roleshash{$key}));
975: my $now=time;
976: if (defined($end) && $end && ($now > $end)) {
977: $Expired{$end}=$section;
978: next;
979: }
980: if (defined($start) && $start && ($now < $start)) {
981: $Pending{$start}=$section;
982: next;
983: }
984: return &do_cache_new('getsection',$hashid,$section,$cachetime);
985: }
986: #
987: # Presumedly there will be few matching roles from the above
988: # loop and the sorting time will be negligible.
989: if (scalar(keys(%Pending))) {
990: my ($time) = sort {$a <=> $b} keys(%Pending);
991: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
992: }
993: if (scalar(keys(%Expired))) {
994: my @sorted = sort {$a <=> $b} keys(%Expired);
995: my $time = pop(@sorted);
996: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
997: }
998: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
999: }
1000:
1001: sub save_cache {
1002: &purge_remembered();
1003: #&Apache::loncommon::validate_page();
1004: undef(%env);
1005: undef($env_loaded);
1006: }
1007:
1008: my $to_remember=-1;
1009: my %remembered;
1010: my %accessed;
1011: my $kicks=0;
1012: my $hits=0;
1013: sub make_key {
1014: my ($name,$id) = @_;
1015: if (length($id) > 200) { $id=length($id).':'.&Digest::MD5::md5_hex($id); }
1016: return &escape($name.':'.$id);
1017: }
1018:
1019: sub devalidate_cache_new {
1020: my ($name,$id,$debug) = @_;
1021: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
1022: $id=&make_key($name,$id);
1023: $memcache->delete($id);
1024: delete($remembered{$id});
1025: delete($accessed{$id});
1026: }
1027:
1028: sub is_cached_new {
1029: my ($name,$id,$debug) = @_;
1030: $id=&make_key($name,$id);
1031: if (exists($remembered{$id})) {
1032: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
1033: $accessed{$id}=[&gettimeofday()];
1034: $hits++;
1035: return ($remembered{$id},1);
1036: }
1037: my $value = $memcache->get($id);
1038: if (!(defined($value))) {
1039: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
1040: return (undef,undef);
1041: }
1042: if ($value eq '__undef__') {
1043: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
1044: $value=undef;
1045: }
1046: &make_room($id,$value,$debug);
1047: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
1048: return ($value,1);
1049: }
1050:
1051: sub do_cache_new {
1052: my ($name,$id,$value,$time,$debug) = @_;
1053: $id=&make_key($name,$id);
1054: my $setvalue=$value;
1055: if (!defined($setvalue)) {
1056: $setvalue='__undef__';
1057: }
1058: if (!defined($time) ) {
1059: $time=600;
1060: }
1061: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
1062: $memcache->set($id,$setvalue,$time);
1063: # need to make a copy of $value
1064: #&make_room($id,$value,$debug);
1065: return $value;
1066: }
1067:
1068: sub make_room {
1069: my ($id,$value,$debug)=@_;
1070: $remembered{$id}=$value;
1071: if ($to_remember<0) { return; }
1072: $accessed{$id}=[&gettimeofday()];
1073: if (scalar(keys(%remembered)) <= $to_remember) { return; }
1074: my $to_kick;
1075: my $max_time=0;
1076: foreach my $other (keys(%accessed)) {
1077: if (&tv_interval($accessed{$other}) > $max_time) {
1078: $to_kick=$other;
1079: $max_time=&tv_interval($accessed{$other});
1080: }
1081: }
1082: delete($remembered{$to_kick});
1083: delete($accessed{$to_kick});
1084: $kicks++;
1085: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
1086: return;
1087: }
1088:
1089: sub purge_remembered {
1090: #&logthis("Tossing ".scalar(keys(%remembered)));
1091: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
1092: undef(%remembered);
1093: undef(%accessed);
1094: }
1095: # ------------------------------------- Read an entry from a user's environment
1096:
1097: sub userenvironment {
1098: my ($udom,$unam,@what)=@_;
1099: my %returnhash=();
1100: my @answer=split(/\&/,
1101: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1102: &homeserver($unam,$udom)));
1103: my $i;
1104: for ($i=0;$i<=$#what;$i++) {
1105: $returnhash{$what[$i]}=&unescape($answer[$i]);
1106: }
1107: return %returnhash;
1108: }
1109:
1110: # ---------------------------------------------------------- Get a studentphoto
1111: sub studentphoto {
1112: my ($udom,$unam,$ext) = @_;
1113: my $home=&Apache::lonnet::homeserver($unam,$udom);
1114: if (defined($env{'request.course.id'})) {
1115: if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
1116: if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
1117: return(&retrievestudentphoto($udom,$unam,$ext));
1118: } else {
1119: my ($result,$perm_reqd)=
1120: &Apache::lonnet::auto_photo_permission($unam,$udom);
1121: if ($result eq 'ok') {
1122: if (!($perm_reqd eq 'yes')) {
1123: return(&retrievestudentphoto($udom,$unam,$ext));
1124: }
1125: }
1126: }
1127: }
1128: } else {
1129: my ($result,$perm_reqd) =
1130: &Apache::lonnet::auto_photo_permission($unam,$udom);
1131: if ($result eq 'ok') {
1132: if (!($perm_reqd eq 'yes')) {
1133: return(&retrievestudentphoto($udom,$unam,$ext));
1134: }
1135: }
1136: }
1137: return '/adm/lonKaputt/lonlogo_broken.gif';
1138: }
1139:
1140: sub retrievestudentphoto {
1141: my ($udom,$unam,$ext,$type) = @_;
1142: my $home=&Apache::lonnet::homeserver($unam,$udom);
1143: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
1144: if ($ret eq 'ok') {
1145: my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
1146: if ($type eq 'thumbnail') {
1147: $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
1148: }
1149: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
1150: return $tokenurl;
1151: } else {
1152: if ($type eq 'thumbnail') {
1153: return '/adm/lonKaputt/genericstudent_tn.gif';
1154: } else {
1155: return '/adm/lonKaputt/lonlogo_broken.gif';
1156: }
1157: }
1158: }
1159:
1160: # -------------------------------------------------------------------- New chat
1161:
1162: sub chatsend {
1163: my ($newentry,$anon,$group)=@_;
1164: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1165: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1166: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1167: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1168: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
1169: &escape($newentry)).':'.$group,$chome);
1170: }
1171:
1172: # ------------------------------------------ Find current version of a resource
1173:
1174: sub getversion {
1175: my $fname=&clutter(shift);
1176: unless ($fname=~/^\/res\//) { return -1; }
1177: return ¤tversion(&filelocation('',$fname));
1178: }
1179:
1180: sub currentversion {
1181: my $fname=shift;
1182: my ($result,$cached)=&is_cached_new('resversion',$fname);
1183: if (defined($cached)) { return $result; }
1184: my $author=$fname;
1185: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1186: my ($udom,$uname)=split(/\//,$author);
1187: my $home=homeserver($uname,$udom);
1188: if ($home eq 'no_host') {
1189: return -1;
1190: }
1191: my $answer=reply("currentversion:$fname",$home);
1192: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1193: return -1;
1194: }
1195: return &do_cache_new('resversion',$fname,$answer,600);
1196: }
1197:
1198: # ----------------------------- Subscribe to a resource, return URL if possible
1199:
1200: sub subscribe {
1201: my $fname=shift;
1202: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1203: $fname=~s/[\n\r]//g;
1204: my $author=$fname;
1205: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1206: my ($udom,$uname)=split(/\//,$author);
1207: my $home=homeserver($uname,$udom);
1208: if ($home eq 'no_host') {
1209: return 'not_found';
1210: }
1211: my $answer=reply("sub:$fname",$home);
1212: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1213: $answer.=' by '.$home;
1214: }
1215: return $answer;
1216: }
1217:
1218: # -------------------------------------------------------------- Replicate file
1219:
1220: sub repcopy {
1221: my $filename=shift;
1222: $filename=~s/\/+/\//g;
1223: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1224: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1225: if ($filename=~m|^/home/httpd/html/userfiles/| or
1226: $filename=~m -^/*(uploaded|editupload)/-) {
1227: return &repcopy_userfile($filename);
1228: }
1229: $filename=~s/[\n\r]//g;
1230: my $transname="$filename.in.transfer";
1231: # FIXME: this should flock
1232: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1233: my $remoteurl=subscribe($filename);
1234: if ($remoteurl =~ /^con_lost by/) {
1235: &logthis("Subscribe returned $remoteurl: $filename");
1236: return 'unavailable';
1237: } elsif ($remoteurl eq 'not_found') {
1238: #&logthis("Subscribe returned not_found: $filename");
1239: return 'not_found';
1240: } elsif ($remoteurl =~ /^rejected by/) {
1241: &logthis("Subscribe returned $remoteurl: $filename");
1242: return 'forbidden';
1243: } elsif ($remoteurl eq 'directory') {
1244: return 'ok';
1245: } else {
1246: my $author=$filename;
1247: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1248: my ($udom,$uname)=split(/\//,$author);
1249: my $home=homeserver($uname,$udom);
1250: unless ($home eq $perlvar{'lonHostID'}) {
1251: my @parts=split(/\//,$filename);
1252: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1253: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1254: &logthis("Malconfiguration for replication: $filename");
1255: return 'bad_request';
1256: }
1257: my $count;
1258: for ($count=5;$count<$#parts;$count++) {
1259: $path.="/$parts[$count]";
1260: if ((-e $path)!=1) {
1261: mkdir($path,0777);
1262: }
1263: }
1264: my $ua=new LWP::UserAgent;
1265: my $request=new HTTP::Request('GET',"$remoteurl");
1266: my $response=$ua->request($request,$transname);
1267: if ($response->is_error()) {
1268: unlink($transname);
1269: my $message=$response->status_line;
1270: &logthis("<font color=\"blue\">WARNING:"
1271: ." LWP get: $message: $filename</font>");
1272: return 'unavailable';
1273: } else {
1274: if ($remoteurl!~/\.meta$/) {
1275: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1276: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1277: if ($mresponse->is_error()) {
1278: unlink($filename.'.meta');
1279: &logthis(
1280: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1281: }
1282: }
1283: rename($transname,$filename);
1284: return 'ok';
1285: }
1286: }
1287: }
1288: }
1289:
1290: # ------------------------------------------------ Get server side include body
1291: sub ssi_body {
1292: my ($filelink,%form)=@_;
1293: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1294: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1295: }
1296: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1297: &ssi($filelink,%form));
1298: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
1299: $output=~s/^.*?\<body[^\>]*\>//si;
1300: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1301: return $output;
1302: }
1303:
1304: # --------------------------------------------------------- Server Side Include
1305:
1306: sub absolute_url {
1307: my ($host_name) = @_;
1308: my $protocol = ($ENV{'SERVER_PORT'} == 443?'https://':'http://');
1309: if ($host_name eq '') {
1310: $host_name = $ENV{'SERVER_NAME'};
1311: }
1312: return $protocol.$host_name;
1313: }
1314:
1315: sub ssi {
1316:
1317: my ($fn,%form)=@_;
1318:
1319: my $ua=new LWP::UserAgent;
1320:
1321: my $request;
1322:
1323: $form{'no_update_last_known'}=1;
1324:
1325: if (%form) {
1326: $request=new HTTP::Request('POST',&absolute_url().$fn);
1327: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1328: } else {
1329: $request=new HTTP::Request('GET',&absolute_url().$fn);
1330: }
1331:
1332: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1333: my $response=$ua->request($request);
1334:
1335: return $response->content;
1336: }
1337:
1338: sub externalssi {
1339: my ($url)=@_;
1340: my $ua=new LWP::UserAgent;
1341: my $request=new HTTP::Request('GET',$url);
1342: my $response=$ua->request($request);
1343: return $response->content;
1344: }
1345:
1346: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1347:
1348: sub allowuploaded {
1349: my ($srcurl,$url)=@_;
1350: $url=&clutter(&declutter($url));
1351: my $dir=$url;
1352: $dir=~s/\/[^\/]+$//;
1353: my %httpref=();
1354: my $httpurl=&hreflocation('',$url);
1355: $httpref{'httpref.'.$httpurl}=$srcurl;
1356: &Apache::lonnet::appenv(%httpref);
1357: }
1358:
1359: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1360: # input: action, courseID, current domain, intended
1361: # path to file, source of file, instruction to parse file for objects,
1362: # ref to hash for embedded objects,
1363: # ref to hash for codebase of java objects.
1364: #
1365: # output: url to file (if action was uploaddoc),
1366: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1367: #
1368: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1369: # course.
1370: #
1371: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1372: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1373: # course's home server.
1374: #
1375: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1376: # be copied from $source (current location) to
1377: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1378: # and will then be copied to
1379: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1380: # course's home server.
1381: #
1382: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1383: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1384: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1385: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1386: # in course's home server.
1387: #
1388:
1389: sub process_coursefile {
1390: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1391: my $fetchresult;
1392: my $home=&homeserver($docuname,$docudom);
1393: if ($action eq 'propagate') {
1394: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1395: $home);
1396: } else {
1397: my $fpath = '';
1398: my $fname = $file;
1399: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1400: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1401: my $filepath = &build_filepath($fpath);
1402: if ($action eq 'copy') {
1403: if ($source eq '') {
1404: $fetchresult = 'no source file';
1405: return $fetchresult;
1406: } else {
1407: my $destination = $filepath.'/'.$fname;
1408: rename($source,$destination);
1409: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1410: $home);
1411: }
1412: } elsif ($action eq 'uploaddoc') {
1413: open(my $fh,'>'.$filepath.'/'.$fname);
1414: print $fh $env{'form.'.$source};
1415: close($fh);
1416: if ($parser eq 'parse') {
1417: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1418: unless ($parse_result eq 'ok') {
1419: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1420: }
1421: }
1422: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1423: $home);
1424: if ($fetchresult eq 'ok') {
1425: return '/uploaded/'.$fpath.'/'.$fname;
1426: } else {
1427: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1428: ' to host '.$home.': '.$fetchresult);
1429: return '/adm/notfound.html';
1430: }
1431: }
1432: }
1433: unless ( $fetchresult eq 'ok') {
1434: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1435: ' to host '.$home.': '.$fetchresult);
1436: }
1437: return $fetchresult;
1438: }
1439:
1440: sub build_filepath {
1441: my ($fpath) = @_;
1442: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1443: unless ($fpath eq '') {
1444: my @parts=split('/',$fpath);
1445: foreach my $part (@parts) {
1446: $filepath.= '/'.$part;
1447: if ((-e $filepath)!=1) {
1448: mkdir($filepath,0777);
1449: }
1450: }
1451: }
1452: return $filepath;
1453: }
1454:
1455: sub store_edited_file {
1456: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1457: my $file = $primary_url;
1458: $file =~ s#^/uploaded/$docudom/$docuname/##;
1459: my $fpath = '';
1460: my $fname = $file;
1461: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1462: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1463: my $filepath = &build_filepath($fpath);
1464: open(my $fh,'>'.$filepath.'/'.$fname);
1465: print $fh $content;
1466: close($fh);
1467: my $home=&homeserver($docuname,$docudom);
1468: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1469: $home);
1470: if ($$fetchresult eq 'ok') {
1471: return '/uploaded/'.$fpath.'/'.$fname;
1472: } else {
1473: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1474: ' to host '.$home.': '.$$fetchresult);
1475: return '/adm/notfound.html';
1476: }
1477: }
1478:
1479: sub clean_filename {
1480: my ($fname,$args)=@_;
1481: # Replace Windows backslashes by forward slashes
1482: $fname=~s/\\/\//g;
1483: if (!$args->{'keep_path'}) {
1484: # Get rid of everything but the actual filename
1485: $fname=~s/^.*\/([^\/]+)$/$1/;
1486: }
1487: # Replace spaces by underscores
1488: $fname=~s/\s+/\_/g;
1489: # Replace all other weird characters by nothing
1490: $fname=~s{[^/\w\.\-]}{}g;
1491: # Replace all .\d. sequences with _\d. so they no longer look like version
1492: # numbers
1493: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1494: return $fname;
1495: }
1496:
1497: # --------------- Take an uploaded file and put it into the userfiles directory
1498: # input: $formname - the contents of the file are in $env{"form.$formname"}
1499: # the desired filenam is in $env{"form.$formname.filename"}
1500: # $coursedoc - if true up to the current course
1501: # if false
1502: # $subdir - directory in userfile to store the file into
1503: # $parser, $allfiles, $codebase - unknown
1504: #
1505: # output: url of file in userspace, or error: <message>
1506: # or /adm/notfound.html if failure to upload occurse
1507:
1508:
1509: sub userfileupload {
1510: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,$destudom)=@_;
1511: if (!defined($subdir)) { $subdir='unknown'; }
1512: my $fname=$env{'form.'.$formname.'.filename'};
1513: $fname=&clean_filename($fname);
1514: # See if there is anything left
1515: unless ($fname) { return 'error: no uploaded file'; }
1516: chop($env{'form.'.$formname});
1517: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1518: my $now = time;
1519: my $filepath = 'tmp/helprequests/'.$now;
1520: my @parts=split(/\//,$filepath);
1521: my $fullpath = $perlvar{'lonDaemons'};
1522: for (my $i=0;$i<@parts;$i++) {
1523: $fullpath .= '/'.$parts[$i];
1524: if ((-e $fullpath)!=1) {
1525: mkdir($fullpath,0777);
1526: }
1527: }
1528: open(my $fh,'>'.$fullpath.'/'.$fname);
1529: print $fh $env{'form.'.$formname};
1530: close($fh);
1531: return $fullpath.'/'.$fname;
1532: } elsif (($formname eq 'coursecreatorxml') && ($subdir eq 'batchupload')) { #files uploaded to create course page are handled differently
1533: my $filepath = 'tmp/addcourse/'.$destudom.'/web/'.$env{'user.name'}.
1534: '_'.$env{'user.domain'}.'/pending';
1535: my @parts=split(/\//,$filepath);
1536: my $fullpath = $perlvar{'lonDaemons'};
1537: for (my $i=0;$i<@parts;$i++) {
1538: $fullpath .= '/'.$parts[$i];
1539: if ((-e $fullpath)!=1) {
1540: mkdir($fullpath,0777);
1541: }
1542: }
1543: open(my $fh,'>'.$fullpath.'/'.$fname);
1544: print $fh $env{'form.'.$formname};
1545: close($fh);
1546: return $fullpath.'/'.$fname;
1547: }
1548:
1549: # Create the directory if not present
1550: $fname="$subdir/$fname";
1551: if ($coursedoc) {
1552: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1553: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1554: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1555: return &finishuserfileupload($docuname,$docudom,
1556: $formname,$fname,$parser,$allfiles,
1557: $codebase);
1558: } else {
1559: $fname=$env{'form.folder'}.'/'.$fname;
1560: return &process_coursefile('uploaddoc',$docuname,$docudom,
1561: $fname,$formname,$parser,
1562: $allfiles,$codebase);
1563: }
1564: } elsif (defined($destuname)) {
1565: my $docuname=$destuname;
1566: my $docudom=$destudom;
1567: return &finishuserfileupload($docuname,$docudom,$formname,
1568: $fname,$parser,$allfiles,$codebase);
1569:
1570: } else {
1571: my $docuname=$env{'user.name'};
1572: my $docudom=$env{'user.domain'};
1573: if (exists($env{'form.group'})) {
1574: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1575: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1576: }
1577: return &finishuserfileupload($docuname,$docudom,$formname,
1578: $fname,$parser,$allfiles,$codebase);
1579: }
1580: }
1581:
1582: sub finishuserfileupload {
1583: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
1584: my $path=$docudom.'/'.$docuname.'/';
1585: my $filepath=$perlvar{'lonDocRoot'};
1586: my ($fnamepath,$file);
1587: $file=$fname;
1588: if ($fname=~m|/|) {
1589: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1590: $path.=$fnamepath.'/';
1591: }
1592: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1593: my $count;
1594: for ($count=4;$count<=$#parts;$count++) {
1595: $filepath.="/$parts[$count]";
1596: if ((-e $filepath)!=1) {
1597: mkdir($filepath,0777);
1598: }
1599: }
1600: # Save the file
1601: {
1602: if (!open(FH,'>'.$filepath.'/'.$file)) {
1603: &logthis('Failed to create '.$filepath.'/'.$file);
1604: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1605: return '/adm/notfound.html';
1606: }
1607: if (!print FH ($env{'form.'.$formname})) {
1608: &logthis('Failed to write to '.$filepath.'/'.$file);
1609: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1610: return '/adm/notfound.html';
1611: }
1612: close(FH);
1613: }
1614: if ($parser eq 'parse') {
1615: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1616: $codebase);
1617: unless ($parse_result eq 'ok') {
1618: &logthis('Failed to parse '.$filepath.$file.
1619: ' for embedded media: '.$parse_result);
1620: }
1621: }
1622: # Notify homeserver to grep it
1623: #
1624: my $docuhome=&homeserver($docuname,$docudom);
1625: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1626: if ($fetchresult eq 'ok') {
1627: #
1628: # Return the URL to it
1629: return '/uploaded/'.$path.$file;
1630: } else {
1631: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1632: ': '.$fetchresult);
1633: return '/adm/notfound.html';
1634: }
1635: }
1636:
1637: sub extract_embedded_items {
1638: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1639: my @state = ();
1640: my %javafiles = (
1641: codebase => '',
1642: code => '',
1643: archive => ''
1644: );
1645: my %mediafiles = (
1646: src => '',
1647: movie => '',
1648: );
1649: my $p;
1650: if ($content) {
1651: $p = HTML::LCParser->new($content);
1652: } else {
1653: $p = HTML::LCParser->new($filepath.'/'.$file);
1654: }
1655: while (my $t=$p->get_token()) {
1656: if ($t->[0] eq 'S') {
1657: my ($tagname, $attr) = ($t->[1],$t->[2]);
1658: push (@state, $tagname);
1659: if (lc($tagname) eq 'allow') {
1660: &add_filetype($allfiles,$attr->{'src'},'src');
1661: }
1662: if (lc($tagname) eq 'img') {
1663: &add_filetype($allfiles,$attr->{'src'},'src');
1664: }
1665: if (lc($tagname) eq 'script') {
1666: if ($attr->{'archive'} =~ /\.jar$/i) {
1667: &add_filetype($allfiles,$attr->{'archive'},'archive');
1668: } else {
1669: &add_filetype($allfiles,$attr->{'src'},'src');
1670: }
1671: }
1672: if (lc($tagname) eq 'link') {
1673: if (lc($attr->{'rel'}) eq 'stylesheet') {
1674: &add_filetype($allfiles,$attr->{'href'},'href');
1675: }
1676: }
1677: if (lc($tagname) eq 'object' ||
1678: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1679: foreach my $item (keys(%javafiles)) {
1680: $javafiles{$item} = '';
1681: }
1682: }
1683: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1684: my $name = lc($attr->{'name'});
1685: foreach my $item (keys(%javafiles)) {
1686: if ($name eq $item) {
1687: $javafiles{$item} = $attr->{'value'};
1688: last;
1689: }
1690: }
1691: foreach my $item (keys(%mediafiles)) {
1692: if ($name eq $item) {
1693: &add_filetype($allfiles, $attr->{'value'}, 'value');
1694: last;
1695: }
1696: }
1697: }
1698: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1699: foreach my $item (keys(%javafiles)) {
1700: if ($attr->{$item}) {
1701: $javafiles{$item} = $attr->{$item};
1702: last;
1703: }
1704: }
1705: foreach my $item (keys(%mediafiles)) {
1706: if ($attr->{$item}) {
1707: &add_filetype($allfiles,$attr->{$item},$item);
1708: last;
1709: }
1710: }
1711: }
1712: } elsif ($t->[0] eq 'E') {
1713: my ($tagname) = ($t->[1]);
1714: if ($javafiles{'codebase'} ne '') {
1715: $javafiles{'codebase'} .= '/';
1716: }
1717: if (lc($tagname) eq 'applet' ||
1718: lc($tagname) eq 'object' ||
1719: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1720: ) {
1721: foreach my $item (keys(%javafiles)) {
1722: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1723: my $file=$javafiles{'codebase'}.$javafiles{$item};
1724: &add_filetype($allfiles,$file,$item);
1725: }
1726: }
1727: }
1728: pop @state;
1729: }
1730: }
1731: return 'ok';
1732: }
1733:
1734: sub add_filetype {
1735: my ($allfiles,$file,$type)=@_;
1736: if (exists($allfiles->{$file})) {
1737: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1738: push(@{$allfiles->{$file}}, &escape($type));
1739: }
1740: } else {
1741: @{$allfiles->{$file}} = (&escape($type));
1742: }
1743: }
1744:
1745: sub removeuploadedurl {
1746: my ($url)=@_;
1747: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1748: return &removeuserfile($uname,$udom,$fname);
1749: }
1750:
1751: sub removeuserfile {
1752: my ($docuname,$docudom,$fname)=@_;
1753: my $home=&homeserver($docuname,$docudom);
1754: my $result = &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1755: if ($result eq 'ok') {
1756: if (($fname !~ /\.meta$/) && (&is_portfolio_file($fname))) {
1757: my $metafile = $fname.'.meta';
1758: my $metaresult = &removeuserfile($docuname,$docudom,$metafile);
1759: my $url = "/uploaded/$docudom/$docuname/$fname";
1760: my ($file,$group) = (&parse_portfolio_url($url))[3,4];
1761: my $sqlresult =
1762: &update_portfolio_table($docuname,$docudom,$file,
1763: 'portfolio_metadata',$group,
1764: 'delete');
1765: }
1766: }
1767: return $result;
1768: }
1769:
1770: sub mkdiruserfile {
1771: my ($docuname,$docudom,$dir)=@_;
1772: my $home=&homeserver($docuname,$docudom);
1773: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1774: }
1775:
1776: sub renameuserfile {
1777: my ($docuname,$docudom,$old,$new)=@_;
1778: my $home=&homeserver($docuname,$docudom);
1779: my $result = &reply("renameuserfile:$docudom:$docuname:".
1780: &escape("$old").':'.&escape("$new"),$home);
1781: if ($result eq 'ok') {
1782: if (($old !~ /\.meta$/) && (&is_portfolio_file($old))) {
1783: my $oldmeta = $old.'.meta';
1784: my $newmeta = $new.'.meta';
1785: my $metaresult =
1786: &renameuserfile($docuname,$docudom,$oldmeta,$newmeta);
1787: my $url = "/uploaded/$docudom/$docuname/$old";
1788: my ($file,$group) = (&parse_portfolio_url($url))[3,4];
1789: my $sqlresult =
1790: &update_portfolio_table($docuname,$docudom,$file,
1791: 'portfolio_metadata',$group,
1792: 'delete');
1793: }
1794: }
1795: return $result;
1796: }
1797:
1798: # ------------------------------------------------------------------------- Log
1799:
1800: sub log {
1801: my ($dom,$nam,$hom,$what)=@_;
1802: return critical("log:$dom:$nam:$what",$hom);
1803: }
1804:
1805: # ------------------------------------------------------------------ Course Log
1806: #
1807: # This routine flushes several buffers of non-mission-critical nature
1808: #
1809:
1810: sub flushcourselogs {
1811: &logthis('Flushing log buffers');
1812: #
1813: # course logs
1814: # This is a log of all transactions in a course, which can be used
1815: # for data mining purposes
1816: #
1817: # It also collects the courseid database, which lists last transaction
1818: # times and course titles for all courseids
1819: #
1820: my %courseidbuffer=();
1821: foreach my $crsid (keys %courselogs) {
1822: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1823: &escape($courselogs{$crsid}),
1824: $coursehombuf{$crsid}) eq 'ok') {
1825: delete $courselogs{$crsid};
1826: } else {
1827: &logthis('Failed to flush log buffer for '.$crsid);
1828: if (length($courselogs{$crsid})>40000) {
1829: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
1830: " exceeded maximum size, deleting.</font>");
1831: delete $courselogs{$crsid};
1832: }
1833: }
1834: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1835: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1836: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1837: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1838: } else {
1839: $courseidbuffer{$coursehombuf{$crsid}}=
1840: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1841: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1842: }
1843: }
1844: #
1845: # Write course id database (reverse lookup) to homeserver of courses
1846: # Is used in pickcourse
1847: #
1848: foreach my $crs_home (keys(%courseidbuffer)) {
1849: &courseidput(&host_domain($crs_home),$courseidbuffer{$crs_home},
1850: $crs_home);
1851: }
1852: #
1853: # File accesses
1854: # Writes to the dynamic metadata of resources to get hit counts, etc.
1855: #
1856: foreach my $entry (keys(%accesshash)) {
1857: if ($entry =~ /___count$/) {
1858: my ($dom,$name);
1859: ($dom,$name,undef)=
1860: ($entry=~m{___($match_domain)/($match_name)/(.*)___count$});
1861: if (! defined($dom) || $dom eq '' ||
1862: ! defined($name) || $name eq '') {
1863: my $cid = $env{'request.course.id'};
1864: $dom = $env{'request.'.$cid.'.domain'};
1865: $name = $env{'request.'.$cid.'.num'};
1866: }
1867: my $value = $accesshash{$entry};
1868: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1869: my %temphash=($url => $value);
1870: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1871: if ($result eq 'ok') {
1872: delete $accesshash{$entry};
1873: } elsif ($result eq 'unknown_cmd') {
1874: # Target server has old code running on it.
1875: my %temphash=($entry => $value);
1876: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1877: delete $accesshash{$entry};
1878: }
1879: }
1880: } else {
1881: my ($dom,$name) = ($entry=~m{___($match_domain)/($match_name)/(.*)___(\w+)$});
1882: my %temphash=($entry => $accesshash{$entry});
1883: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1884: delete $accesshash{$entry};
1885: }
1886: }
1887: }
1888: #
1889: # Roles
1890: # Reverse lookup of user roles for course faculty/staff and co-authorship
1891: #
1892: foreach my $entry (keys(%userrolehash)) {
1893: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1894: split(/\:/,$entry);
1895: if (&Apache::lonnet::put('nohist_userroles',
1896: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1897: $rudom,$runame) eq 'ok') {
1898: delete $userrolehash{$entry};
1899: }
1900: }
1901: #
1902: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1903: #
1904: my %domrolebuffer = ();
1905: foreach my $entry (keys %domainrolehash) {
1906: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1907: if ($domrolebuffer{$rudom}) {
1908: $domrolebuffer{$rudom}.='&'.&escape($entry).
1909: '='.&escape($domainrolehash{$entry});
1910: } else {
1911: $domrolebuffer{$rudom}.=&escape($entry).
1912: '='.&escape($domainrolehash{$entry});
1913: }
1914: delete $domainrolehash{$entry};
1915: }
1916: foreach my $dom (keys(%domrolebuffer)) {
1917: my %servers = &get_servers($dom,'library');
1918: foreach my $tryserver (keys(%servers)) {
1919: unless (&reply('domroleput:'.$dom.':'.
1920: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1921: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1922: }
1923: }
1924: }
1925: $dumpcount++;
1926: }
1927:
1928: sub courselog {
1929: my $what=shift;
1930: $what=time.':'.$what;
1931: unless ($env{'request.course.id'}) { return ''; }
1932: $coursedombuf{$env{'request.course.id'}}=
1933: $env{'course.'.$env{'request.course.id'}.'.domain'};
1934: $coursenumbuf{$env{'request.course.id'}}=
1935: $env{'course.'.$env{'request.course.id'}.'.num'};
1936: $coursehombuf{$env{'request.course.id'}}=
1937: $env{'course.'.$env{'request.course.id'}.'.home'};
1938: $coursedescrbuf{$env{'request.course.id'}}=
1939: $env{'course.'.$env{'request.course.id'}.'.description'};
1940: $courseinstcodebuf{$env{'request.course.id'}}=
1941: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1942: $courseownerbuf{$env{'request.course.id'}}=
1943: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1944: $coursetypebuf{$env{'request.course.id'}}=
1945: $env{'course.'.$env{'request.course.id'}.'.type'};
1946: if (defined $courselogs{$env{'request.course.id'}}) {
1947: $courselogs{$env{'request.course.id'}}.='&'.$what;
1948: } else {
1949: $courselogs{$env{'request.course.id'}}.=$what;
1950: }
1951: if (length($courselogs{$env{'request.course.id'}})>4048) {
1952: &flushcourselogs();
1953: }
1954: }
1955:
1956: sub courseacclog {
1957: my $fnsymb=shift;
1958: unless ($env{'request.course.id'}) { return ''; }
1959: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1960: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1961: $what.=':POST';
1962: # FIXME: Probably ought to escape things....
1963: foreach my $key (keys(%env)) {
1964: if ($key=~/^form\.(.*)/) {
1965: $what.=':'.$1.'='.$env{$key};
1966: }
1967: }
1968: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1969: # FIXME: We should not be depending on a form parameter that someone
1970: # editing lonsearchcat.pm might change in the future.
1971: if ($env{'form.phase'} eq 'course_search') {
1972: $what.= ':POST';
1973: # FIXME: Probably ought to escape things....
1974: foreach my $element ('courseexp','crsfulltext','crsrelated',
1975: 'crsdiscuss') {
1976: $what.=':'.$element.'='.$env{'form.'.$element};
1977: }
1978: }
1979: }
1980: &courselog($what);
1981: }
1982:
1983: sub countacc {
1984: my $url=&declutter(shift);
1985: return if (! defined($url) || $url eq '');
1986: unless ($env{'request.course.id'}) { return ''; }
1987: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1988: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1989: $accesshash{$key}++;
1990: }
1991:
1992: sub linklog {
1993: my ($from,$to)=@_;
1994: $from=&declutter($from);
1995: $to=&declutter($to);
1996: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1997: $accesshash{$to.'___'.$from.'___goto'}=1;
1998: }
1999:
2000: sub userrolelog {
2001: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
2002: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
2003: ($trole=~/^in/) || ($trole=~/^cc/) ||
2004: ($trole=~/^ep/) || ($trole=~/^cr/) ||
2005: ($trole=~/^ta/)) {
2006: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
2007: $userrolehash
2008: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
2009: =$tend.':'.$tstart;
2010: }
2011: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
2012: ($trole=~/^li/) || ($trole=~/^li/) ||
2013: ($trole=~/^au/) || ($trole=~/^dg/) ||
2014: ($trole=~/^sc/)) {
2015: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
2016: $domainrolehash
2017: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
2018: = $tend.':'.$tstart;
2019: }
2020: }
2021:
2022: sub get_course_adv_roles {
2023: my $cid=shift;
2024: $cid=$env{'request.course.id'} unless (defined($cid));
2025: my %coursehash=&coursedescription($cid);
2026: my %nothide=();
2027: foreach my $user (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
2028: $nothide{join(':',split(/[\@\:]/,$user))}=1;
2029: }
2030: my %returnhash=();
2031: my %dumphash=
2032: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
2033: my $now=time;
2034: foreach my $entry (keys %dumphash) {
2035: my ($tend,$tstart)=split(/\:/,$dumphash{$entry});
2036: if (($tstart) && ($tstart<0)) { next; }
2037: if (($tend) && ($tend<$now)) { next; }
2038: if (($tstart) && ($now<$tstart)) { next; }
2039: my ($role,$username,$domain,$section)=split(/\:/,$entry);
2040: if ($username eq '' || $domain eq '') { next; }
2041: if ((&privileged($username,$domain)) &&
2042: (!$nothide{$username.':'.$domain})) { next; }
2043: if ($role eq 'cr') { next; }
2044: my $key=&plaintext($role);
2045: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
2046: if ($returnhash{$key}) {
2047: $returnhash{$key}.=','.$username.':'.$domain;
2048: } else {
2049: $returnhash{$key}=$username.':'.$domain;
2050: }
2051: }
2052: return %returnhash;
2053: }
2054:
2055: sub get_my_roles {
2056: my ($uname,$udom,$types,$roles,$roledoms)=@_;
2057: unless (defined($uname)) { $uname=$env{'user.name'}; }
2058: unless (defined($udom)) { $udom=$env{'user.domain'}; }
2059: my %dumphash=
2060: &dump('nohist_userroles',$udom,$uname);
2061: my %returnhash=();
2062: my $now=time;
2063: foreach my $entry (keys(%dumphash)) {
2064: my ($tend,$tstart)=split(/\:/,$dumphash{$entry});
2065: if (($tstart) && ($tstart<0)) { next; }
2066: my $status = 'active';
2067: if (($tend) && ($tend<$now)) {
2068: $status = 'previous';
2069: }
2070: if (($tstart) && ($now<$tstart)) {
2071: $status = 'future';
2072: }
2073: if (ref($types) eq 'ARRAY') {
2074: if (!grep(/^\Q$status\E$/,@{$types})) {
2075: next;
2076: }
2077: } else {
2078: if ($status ne 'active') {
2079: next;
2080: }
2081: }
2082: my ($role,$username,$domain,$section)=split(/\:/,$entry);
2083: if (ref($roledoms) eq 'ARRAY') {
2084: if (!grep(/^\Q$domain\E$/,@{$roledoms})) {
2085: next;
2086: }
2087: }
2088: if (ref($roles) eq 'ARRAY') {
2089: if (!grep(/^\Q$role\E$/,@{$roles})) {
2090: next;
2091: }
2092: }
2093: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
2094: }
2095: return %returnhash;
2096: }
2097:
2098: # ----------------------------------------------------- Frontpage Announcements
2099: #
2100: #
2101:
2102: sub postannounce {
2103: my ($server,$text)=@_;
2104: unless (&allowed('psa',&host_domain($server))) { return 'refused'; }
2105: unless ($text=~/\w/) { $text=''; }
2106: return &reply('setannounce:'.&escape($text),$server);
2107: }
2108:
2109: sub getannounce {
2110:
2111: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
2112: my $announcement='';
2113: while (my $line = <$fh>) { $announcement .= $line; }
2114: close($fh);
2115: if ($announcement=~/\w/) {
2116: return
2117: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
2118: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
2119: } else {
2120: return '';
2121: }
2122: } else {
2123: return '';
2124: }
2125: }
2126:
2127: # ---------------------------------------------------------- Course ID routines
2128: # Deal with domain's nohist_courseid.db files
2129: #
2130:
2131: sub courseidput {
2132: my ($domain,$what,$coursehome)=@_;
2133: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
2134: }
2135:
2136: sub courseiddump {
2137: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref,$typefilter,$regexp_ok)=@_;
2138: my %returnhash=();
2139: unless ($domfilter) { $domfilter=''; }
2140: my %libserv = &all_library();
2141: foreach my $tryserver (keys(%libserv)) {
2142: if ( ( $hostidflag == 1
2143: && grep(/^\Q$tryserver\E$/,@{$hostidref}) )
2144: || (!defined($hostidflag)) ) {
2145:
2146: if ($domfilter eq ''
2147: || (&host_domain($tryserver) eq $domfilter)) {
2148: foreach my $line (
2149: split(/\&/,&reply('courseiddump:'.&host_domain($tryserver).':'.
2150: $sincefilter.':'.&escape($descfilter).':'.
2151: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter).':'.&escape($typefilter).':'.&escape($regexp_ok),
2152: $tryserver))) {
2153: my ($key,$value)=split(/\=/,$line,2);
2154: if (($key) && ($value)) {
2155: $returnhash{&unescape($key)}=$value;
2156: }
2157: }
2158: }
2159: }
2160: }
2161: return %returnhash;
2162: }
2163:
2164: # ---------------------------------------------------------- DC e-mail
2165:
2166: sub dcmailput {
2167: my ($domain,$msgid,$message,$server)=@_;
2168: my $status = &Apache::lonnet::critical(
2169: 'dcmailput:'.$domain.':'.&escape($msgid).'='.
2170: &escape($message),$server);
2171: return $status;
2172: }
2173:
2174: sub dcmaildump {
2175: my ($dom,$startdate,$enddate,$senders) = @_;
2176: my %returnhash=();
2177:
2178: if (defined(&domain($dom,'primary'))) {
2179: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
2180: &escape($enddate).':';
2181: my @esc_senders=map { &escape($_)} @$senders;
2182: $cmd.=&escape(join('&',@esc_senders));
2183: foreach my $line (split(/\&/,&reply($cmd,&domain($dom,'primary')))) {
2184: my ($key,$value) = split(/\=/,$line,2);
2185: if (($key) && ($value)) {
2186: $returnhash{&unescape($key)} = &unescape($value);
2187: }
2188: }
2189: }
2190: return %returnhash;
2191: }
2192: # ---------------------------------------------------------- Domain roles
2193:
2194: sub get_domain_roles {
2195: my ($dom,$roles,$startdate,$enddate)=@_;
2196: if (undef($startdate) || $startdate eq '') {
2197: $startdate = '.';
2198: }
2199: if (undef($enddate) || $enddate eq '') {
2200: $enddate = '.';
2201: }
2202: my $rolelist = join(':',@{$roles});
2203: my %personnel = ();
2204:
2205: my %servers = &get_servers($dom,'library');
2206: foreach my $tryserver (keys(%servers)) {
2207: %{$personnel{$tryserver}}=();
2208: foreach my $line (split(/\&/,&reply('domrolesdump:'.$dom.':'.
2209: &escape($startdate).':'.
2210: &escape($enddate).':'.
2211: &escape($rolelist), $tryserver))) {
2212: my ($key,$value) = split(/\=/,$line,2);
2213: if (($key) && ($value)) {
2214: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
2215: }
2216: }
2217: }
2218: return %personnel;
2219: }
2220:
2221: # ----------------------------------------------------------- Check out an item
2222:
2223: sub get_first_access {
2224: my ($type,$argsymb)=@_;
2225: my ($symb,$courseid,$udom,$uname)=&whichuser();
2226: if ($argsymb) { $symb=$argsymb; }
2227: my ($map,$id,$res)=&decode_symb($symb);
2228: if ($type eq 'map') {
2229: $res=&symbread($map);
2230: } else {
2231: $res=$symb;
2232: }
2233: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
2234: return $times{"$courseid\0$res"};
2235: }
2236:
2237: sub set_first_access {
2238: my ($type)=@_;
2239: my ($symb,$courseid,$udom,$uname)=&whichuser();
2240: my ($map,$id,$res)=&decode_symb($symb);
2241: if ($type eq 'map') {
2242: $res=&symbread($map);
2243: } else {
2244: $res=$symb;
2245: }
2246: my $firstaccess=&get_first_access($type,$symb);
2247: if (!$firstaccess) {
2248: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
2249: }
2250: return 'already_set';
2251: }
2252:
2253: sub checkout {
2254: my ($symb,$tuname,$tudom,$tcrsid)=@_;
2255: my $now=time;
2256: my $lonhost=$perlvar{'lonHostID'};
2257: my $infostr=&escape(
2258: 'CHECKOUTTOKEN&'.
2259: $tuname.'&'.
2260: $tudom.'&'.
2261: $tcrsid.'&'.
2262: $symb.'&'.
2263: $now.'&'.$ENV{'REMOTE_ADDR'});
2264: my $token=&reply('tmpput:'.$infostr,$lonhost);
2265: if ($token=~/^error\:/) {
2266: &logthis("<font color=\"blue\">WARNING: ".
2267: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
2268: "</font>");
2269: return '';
2270: }
2271:
2272: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
2273: $token=~tr/a-z/A-Z/;
2274:
2275: my %infohash=('resource.0.outtoken' => $token,
2276: 'resource.0.checkouttime' => $now,
2277: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
2278:
2279: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2280: return '';
2281: } else {
2282: &logthis("<font color=\"blue\">WARNING: ".
2283: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
2284: "</font>");
2285: }
2286:
2287: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2288: &escape('Checkout '.$infostr.' - '.
2289: $token)) ne 'ok') {
2290: return '';
2291: } else {
2292: &logthis("<font color=\"blue\">WARNING: ".
2293: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
2294: "</font>");
2295: }
2296: return $token;
2297: }
2298:
2299: # ------------------------------------------------------------ Check in an item
2300:
2301: sub checkin {
2302: my $token=shift;
2303: my $now=time;
2304: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2305: $lonhost=~tr/A-Z/a-z/;
2306: my $dtoken=$ta.'_'.&hostname($lonhost).'_'.$tb;
2307: $dtoken=~s/\W/\_/g;
2308: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2309: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2310:
2311: unless (($tuname) && ($tudom)) {
2312: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2313: return '';
2314: }
2315:
2316: unless (&allowed('mgr',$tcrsid)) {
2317: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2318: $env{'user.name'}.' - '.$env{'user.domain'});
2319: return '';
2320: }
2321:
2322: my %infohash=('resource.0.intoken' => $token,
2323: 'resource.0.checkintime' => $now,
2324: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2325:
2326: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2327: return '';
2328: }
2329:
2330: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2331: &escape('Checkin - '.$token)) ne 'ok') {
2332: return '';
2333: }
2334:
2335: return ($symb,$tuname,$tudom,$tcrsid);
2336: }
2337:
2338: # --------------------------------------------- Set Expire Date for Spreadsheet
2339:
2340: sub expirespread {
2341: my ($uname,$udom,$stype,$usymb)=@_;
2342: my $cid=$env{'request.course.id'};
2343: if ($cid) {
2344: my $now=time;
2345: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2346: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2347: $env{'course.'.$cid.'.num'}.
2348: ':nohist_expirationdates:'.
2349: &escape($key).'='.$now,
2350: $env{'course.'.$cid.'.home'})
2351: }
2352: return 'ok';
2353: }
2354:
2355: # ----------------------------------------------------- Devalidate Spreadsheets
2356:
2357: sub devalidate {
2358: my ($symb,$uname,$udom)=@_;
2359: my $cid=$env{'request.course.id'};
2360: if ($cid) {
2361: # delete the stored spreadsheets for
2362: # - the student level sheet of this user in course's homespace
2363: # - the assessment level sheet for this resource
2364: # for this user in user's homespace
2365: # - current conditional state info
2366: my $key=$uname.':'.$udom.':';
2367: my $status=
2368: &del('nohist_calculatedsheets',
2369: [$key.'studentcalc:'],
2370: $env{'course.'.$cid.'.domain'},
2371: $env{'course.'.$cid.'.num'})
2372: .' '.
2373: &del('nohist_calculatedsheets_'.$cid,
2374: [$key.'assesscalc:'.$symb],$udom,$uname);
2375: unless ($status eq 'ok ok') {
2376: &logthis('Could not devalidate spreadsheet '.
2377: $uname.' at '.$udom.' for '.
2378: $symb.': '.$status);
2379: }
2380: &delenv('user.state.'.$cid);
2381: }
2382: }
2383:
2384: sub get_scalar {
2385: my ($string,$end) = @_;
2386: my $value;
2387: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2388: $value = $1;
2389: } elsif ($$string =~ s/^([^&]*?)&//) {
2390: $value = $1;
2391: }
2392: return &unescape($value);
2393: }
2394:
2395: sub array2str {
2396: my (@array) = @_;
2397: my $result=&arrayref2str(\@array);
2398: $result=~s/^__ARRAY_REF__//;
2399: $result=~s/__END_ARRAY_REF__$//;
2400: return $result;
2401: }
2402:
2403: sub arrayref2str {
2404: my ($arrayref) = @_;
2405: my $result='__ARRAY_REF__';
2406: foreach my $elem (@$arrayref) {
2407: if(ref($elem) eq 'ARRAY') {
2408: $result.=&arrayref2str($elem).'&';
2409: } elsif(ref($elem) eq 'HASH') {
2410: $result.=&hashref2str($elem).'&';
2411: } elsif(ref($elem)) {
2412: #print("Got a ref of ".(ref($elem))." skipping.");
2413: } else {
2414: $result.=&escape($elem).'&';
2415: }
2416: }
2417: $result=~s/\&$//;
2418: $result .= '__END_ARRAY_REF__';
2419: return $result;
2420: }
2421:
2422: sub hash2str {
2423: my (%hash) = @_;
2424: my $result=&hashref2str(\%hash);
2425: $result=~s/^__HASH_REF__//;
2426: $result=~s/__END_HASH_REF__$//;
2427: return $result;
2428: }
2429:
2430: sub hashref2str {
2431: my ($hashref)=@_;
2432: my $result='__HASH_REF__';
2433: foreach my $key (sort(keys(%$hashref))) {
2434: if (ref($key) eq 'ARRAY') {
2435: $result.=&arrayref2str($key).'=';
2436: } elsif (ref($key) eq 'HASH') {
2437: $result.=&hashref2str($key).'=';
2438: } elsif (ref($key)) {
2439: $result.='=';
2440: #print("Got a ref of ".(ref($key))." skipping.");
2441: } else {
2442: if ($key) {$result.=&escape($key).'=';} else { last; }
2443: }
2444:
2445: if(ref($hashref->{$key}) eq 'ARRAY') {
2446: $result.=&arrayref2str($hashref->{$key}).'&';
2447: } elsif(ref($hashref->{$key}) eq 'HASH') {
2448: $result.=&hashref2str($hashref->{$key}).'&';
2449: } elsif(ref($hashref->{$key})) {
2450: $result.='&';
2451: #print("Got a ref of ".(ref($hashref->{$key}))." skipping.");
2452: } else {
2453: $result.=&escape($hashref->{$key}).'&';
2454: }
2455: }
2456: $result=~s/\&$//;
2457: $result .= '__END_HASH_REF__';
2458: return $result;
2459: }
2460:
2461: sub str2hash {
2462: my ($string)=@_;
2463: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2464: return %$hash;
2465: }
2466:
2467: sub str2hashref {
2468: my ($string) = @_;
2469:
2470: my %hash;
2471:
2472: if($string !~ /^__HASH_REF__/) {
2473: if (! ($string eq '' || !defined($string))) {
2474: $hash{'error'}='Not hash reference';
2475: }
2476: return (\%hash, $string);
2477: }
2478:
2479: $string =~ s/^__HASH_REF__//;
2480:
2481: while($string !~ /^__END_HASH_REF__/) {
2482: #key
2483: my $key='';
2484: if($string =~ /^__HASH_REF__/) {
2485: ($key, $string)=&str2hashref($string);
2486: if(defined($key->{'error'})) {
2487: $hash{'error'}='Bad data';
2488: return (\%hash, $string);
2489: }
2490: } elsif($string =~ /^__ARRAY_REF__/) {
2491: ($key, $string)=&str2arrayref($string);
2492: if($key->[0] eq 'Array reference error') {
2493: $hash{'error'}='Bad data';
2494: return (\%hash, $string);
2495: }
2496: } else {
2497: $string =~ s/^(.*?)=//;
2498: $key=&unescape($1);
2499: }
2500: $string =~ s/^=//;
2501:
2502: #value
2503: my $value='';
2504: if($string =~ /^__HASH_REF__/) {
2505: ($value, $string)=&str2hashref($string);
2506: if(defined($value->{'error'})) {
2507: $hash{'error'}='Bad data';
2508: return (\%hash, $string);
2509: }
2510: } elsif($string =~ /^__ARRAY_REF__/) {
2511: ($value, $string)=&str2arrayref($string);
2512: if($value->[0] eq 'Array reference error') {
2513: $hash{'error'}='Bad data';
2514: return (\%hash, $string);
2515: }
2516: } else {
2517: $value=&get_scalar(\$string,'__END_HASH_REF__');
2518: }
2519: $string =~ s/^&//;
2520:
2521: $hash{$key}=$value;
2522: }
2523:
2524: $string =~ s/^__END_HASH_REF__//;
2525:
2526: return (\%hash, $string);
2527: }
2528:
2529: sub str2array {
2530: my ($string)=@_;
2531: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2532: return @$array;
2533: }
2534:
2535: sub str2arrayref {
2536: my ($string) = @_;
2537: my @array;
2538:
2539: if($string !~ /^__ARRAY_REF__/) {
2540: if (! ($string eq '' || !defined($string))) {
2541: $array[0]='Array reference error';
2542: }
2543: return (\@array, $string);
2544: }
2545:
2546: $string =~ s/^__ARRAY_REF__//;
2547:
2548: while($string !~ /^__END_ARRAY_REF__/) {
2549: my $value='';
2550: if($string =~ /^__HASH_REF__/) {
2551: ($value, $string)=&str2hashref($string);
2552: if(defined($value->{'error'})) {
2553: $array[0] ='Array reference error';
2554: return (\@array, $string);
2555: }
2556: } elsif($string =~ /^__ARRAY_REF__/) {
2557: ($value, $string)=&str2arrayref($string);
2558: if($value->[0] eq 'Array reference error') {
2559: $array[0] ='Array reference error';
2560: return (\@array, $string);
2561: }
2562: } else {
2563: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2564: }
2565: $string =~ s/^&//;
2566:
2567: push(@array, $value);
2568: }
2569:
2570: $string =~ s/^__END_ARRAY_REF__//;
2571:
2572: return (\@array, $string);
2573: }
2574:
2575: # -------------------------------------------------------------------Temp Store
2576:
2577: sub tmpreset {
2578: my ($symb,$namespace,$domain,$stuname) = @_;
2579: if (!$symb) {
2580: $symb=&symbread();
2581: if (!$symb) { $symb= $env{'request.url'}; }
2582: }
2583: $symb=escape($symb);
2584:
2585: if (!$namespace) { $namespace=$env{'request.state'}; }
2586: $namespace=~s/\//\_/g;
2587: $namespace=~s/\W//g;
2588:
2589: if (!$domain) { $domain=$env{'user.domain'}; }
2590: if (!$stuname) { $stuname=$env{'user.name'}; }
2591: if ($domain eq 'public' && $stuname eq 'public') {
2592: $stuname=$ENV{'REMOTE_ADDR'};
2593: }
2594: my $path=$perlvar{'lonDaemons'}.'/tmp';
2595: my %hash;
2596: if (tie(%hash,'GDBM_File',
2597: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2598: &GDBM_WRCREAT(),0640)) {
2599: foreach my $key (keys %hash) {
2600: if ($key=~ /:$symb/) {
2601: delete($hash{$key});
2602: }
2603: }
2604: }
2605: }
2606:
2607: sub tmpstore {
2608: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2609:
2610: if (!$symb) {
2611: $symb=&symbread();
2612: if (!$symb) { $symb= $env{'request.url'}; }
2613: }
2614: $symb=escape($symb);
2615:
2616: if (!$namespace) {
2617: # I don't think we would ever want to store this for a course.
2618: # it seems this will only be used if we don't have a course.
2619: #$namespace=$env{'request.course.id'};
2620: #if (!$namespace) {
2621: $namespace=$env{'request.state'};
2622: #}
2623: }
2624: $namespace=~s/\//\_/g;
2625: $namespace=~s/\W//g;
2626: if (!$domain) { $domain=$env{'user.domain'}; }
2627: if (!$stuname) { $stuname=$env{'user.name'}; }
2628: if ($domain eq 'public' && $stuname eq 'public') {
2629: $stuname=$ENV{'REMOTE_ADDR'};
2630: }
2631: my $now=time;
2632: my %hash;
2633: my $path=$perlvar{'lonDaemons'}.'/tmp';
2634: if (tie(%hash,'GDBM_File',
2635: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2636: &GDBM_WRCREAT(),0640)) {
2637: $hash{"version:$symb"}++;
2638: my $version=$hash{"version:$symb"};
2639: my $allkeys='';
2640: foreach my $key (keys(%$storehash)) {
2641: $allkeys.=$key.':';
2642: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2643: }
2644: $hash{"$version:$symb:timestamp"}=$now;
2645: $allkeys.='timestamp';
2646: $hash{"$version:keys:$symb"}=$allkeys;
2647: if (untie(%hash)) {
2648: return 'ok';
2649: } else {
2650: return "error:$!";
2651: }
2652: } else {
2653: return "error:$!";
2654: }
2655: }
2656:
2657: # -----------------------------------------------------------------Temp Restore
2658:
2659: sub tmprestore {
2660: my ($symb,$namespace,$domain,$stuname) = @_;
2661:
2662: if (!$symb) {
2663: $symb=&symbread();
2664: if (!$symb) { $symb= $env{'request.url'}; }
2665: }
2666: $symb=escape($symb);
2667:
2668: if (!$namespace) { $namespace=$env{'request.state'}; }
2669:
2670: if (!$domain) { $domain=$env{'user.domain'}; }
2671: if (!$stuname) { $stuname=$env{'user.name'}; }
2672: if ($domain eq 'public' && $stuname eq 'public') {
2673: $stuname=$ENV{'REMOTE_ADDR'};
2674: }
2675: my %returnhash;
2676: $namespace=~s/\//\_/g;
2677: $namespace=~s/\W//g;
2678: my %hash;
2679: my $path=$perlvar{'lonDaemons'}.'/tmp';
2680: if (tie(%hash,'GDBM_File',
2681: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2682: &GDBM_READER(),0640)) {
2683: my $version=$hash{"version:$symb"};
2684: $returnhash{'version'}=$version;
2685: my $scope;
2686: for ($scope=1;$scope<=$version;$scope++) {
2687: my $vkeys=$hash{"$scope:keys:$symb"};
2688: my @keys=split(/:/,$vkeys);
2689: my $key;
2690: $returnhash{"$scope:keys"}=$vkeys;
2691: foreach $key (@keys) {
2692: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2693: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2694: }
2695: }
2696: if (!(untie(%hash))) {
2697: return "error:$!";
2698: }
2699: } else {
2700: return "error:$!";
2701: }
2702: return %returnhash;
2703: }
2704:
2705: # ----------------------------------------------------------------------- Store
2706:
2707: sub store {
2708: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2709: my $home='';
2710:
2711: if ($stuname) { $home=&homeserver($stuname,$domain); }
2712:
2713: $symb=&symbclean($symb);
2714: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2715:
2716: if (!$domain) { $domain=$env{'user.domain'}; }
2717: if (!$stuname) { $stuname=$env{'user.name'}; }
2718:
2719: &devalidate($symb,$stuname,$domain);
2720:
2721: $symb=escape($symb);
2722: if (!$namespace) {
2723: unless ($namespace=$env{'request.course.id'}) {
2724: return '';
2725: }
2726: }
2727: if (!$home) { $home=$env{'user.home'}; }
2728:
2729: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2730: $$storehash{'host'}=$perlvar{'lonHostID'};
2731:
2732: my $namevalue='';
2733: foreach my $key (keys(%$storehash)) {
2734: $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
2735: }
2736: $namevalue=~s/\&$//;
2737: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2738: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2739: }
2740:
2741: # -------------------------------------------------------------- Critical Store
2742:
2743: sub cstore {
2744: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2745: my $home='';
2746:
2747: if ($stuname) { $home=&homeserver($stuname,$domain); }
2748:
2749: $symb=&symbclean($symb);
2750: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2751:
2752: if (!$domain) { $domain=$env{'user.domain'}; }
2753: if (!$stuname) { $stuname=$env{'user.name'}; }
2754:
2755: &devalidate($symb,$stuname,$domain);
2756:
2757: $symb=escape($symb);
2758: if (!$namespace) {
2759: unless ($namespace=$env{'request.course.id'}) {
2760: return '';
2761: }
2762: }
2763: if (!$home) { $home=$env{'user.home'}; }
2764:
2765: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2766: $$storehash{'host'}=$perlvar{'lonHostID'};
2767:
2768: my $namevalue='';
2769: foreach my $key (keys(%$storehash)) {
2770: $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
2771: }
2772: $namevalue=~s/\&$//;
2773: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2774: return critical
2775: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2776: }
2777:
2778: # --------------------------------------------------------------------- Restore
2779:
2780: sub restore {
2781: my ($symb,$namespace,$domain,$stuname) = @_;
2782: my $home='';
2783:
2784: if ($stuname) { $home=&homeserver($stuname,$domain); }
2785:
2786: if (!$symb) {
2787: unless ($symb=escape(&symbread())) { return ''; }
2788: } else {
2789: $symb=&escape(&symbclean($symb));
2790: }
2791: if (!$namespace) {
2792: unless ($namespace=$env{'request.course.id'}) {
2793: return '';
2794: }
2795: }
2796: if (!$domain) { $domain=$env{'user.domain'}; }
2797: if (!$stuname) { $stuname=$env{'user.name'}; }
2798: if (!$home) { $home=$env{'user.home'}; }
2799: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2800:
2801: my %returnhash=();
2802: foreach my $line (split(/\&/,$answer)) {
2803: my ($name,$value)=split(/\=/,$line);
2804: $returnhash{&unescape($name)}=&thaw_unescape($value);
2805: }
2806: my $version;
2807: for ($version=1;$version<=$returnhash{'version'};$version++) {
2808: foreach my $item (split(/\:/,$returnhash{$version.':keys'})) {
2809: $returnhash{$item}=$returnhash{$version.':'.$item};
2810: }
2811: }
2812: return %returnhash;
2813: }
2814:
2815: # ---------------------------------------------------------- Course Description
2816:
2817: sub coursedescription {
2818: my ($courseid,$args)=@_;
2819: $courseid=~s/^\///;
2820: $courseid=~s/\_/\//g;
2821: my ($cdomain,$cnum)=split(/\//,$courseid);
2822: my $chome=&homeserver($cnum,$cdomain);
2823: my $normalid=$cdomain.'_'.$cnum;
2824: # need to always cache even if we get errors otherwise we keep
2825: # trying and trying and trying to get the course description.
2826: my %envhash=();
2827: my %returnhash=();
2828:
2829: my $expiretime=600;
2830: if ($env{'request.course.id'} eq $normalid) {
2831: $expiretime=120;
2832: }
2833:
2834: my $prefix='course.'.$cdomain.'_'.$cnum.'.';
2835: if (!$args->{'freshen_cache'}
2836: && ((time-$env{$prefix.'last_cache'}) < $expiretime) ) {
2837: foreach my $key (keys(%env)) {
2838: next if ($key !~ /^\Q$prefix\E(.*)/);
2839: my ($setting) = $1;
2840: $returnhash{$setting} = $env{$key};
2841: }
2842: return %returnhash;
2843: }
2844:
2845: # get the data agin
2846: if (!$args->{'one_time'}) {
2847: $envhash{'course.'.$normalid.'.last_cache'}=time;
2848: }
2849:
2850: if ($chome ne 'no_host') {
2851: %returnhash=&dump('environment',$cdomain,$cnum);
2852: if (!exists($returnhash{'con_lost'})) {
2853: $returnhash{'home'}= $chome;
2854: $returnhash{'domain'} = $cdomain;
2855: $returnhash{'num'} = $cnum;
2856: if (!defined($returnhash{'type'})) {
2857: $returnhash{'type'} = 'Course';
2858: }
2859: while (my ($name,$value) = each %returnhash) {
2860: $envhash{'course.'.$normalid.'.'.$name}=$value;
2861: }
2862: $returnhash{'url'}=&clutter($returnhash{'url'});
2863: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2864: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2865: $envhash{'course.'.$normalid.'.home'}=$chome;
2866: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2867: $envhash{'course.'.$normalid.'.num'}=$cnum;
2868: }
2869: }
2870: if (!$args->{'one_time'}) {
2871: &appenv(%envhash);
2872: }
2873: return %returnhash;
2874: }
2875:
2876: # -------------------------------------------------See if a user is privileged
2877:
2878: sub privileged {
2879: my ($username,$domain)=@_;
2880: my $rolesdump=&reply("dump:$domain:$username:roles",
2881: &homeserver($username,$domain));
2882: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2883: my $now=time;
2884: if ($rolesdump ne '') {
2885: foreach my $entry (split(/&/,$rolesdump)) {
2886: if ($entry!~/^rolesdef_/) {
2887: my ($area,$role)=split(/=/,$entry);
2888: $area=~s/\_\w\w$//;
2889: my ($trole,$tend,$tstart)=split(/_/,$role);
2890: if (($trole eq 'dc') || ($trole eq 'su')) {
2891: my $active=1;
2892: if ($tend) {
2893: if ($tend<$now) { $active=0; }
2894: }
2895: if ($tstart) {
2896: if ($tstart>$now) { $active=0; }
2897: }
2898: if ($active) { return 1; }
2899: }
2900: }
2901: }
2902: }
2903: return 0;
2904: }
2905:
2906: # -------------------------------------------------------- Get user privileges
2907:
2908: sub rolesinit {
2909: my ($domain,$username,$authhost)=@_;
2910: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2911: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2912: my %allroles=();
2913: my %allgroups=();
2914: my $now=time;
2915: my %userroles = ('user.login.time' => $now);
2916: my $group_privs;
2917:
2918: if ($rolesdump ne '') {
2919: foreach my $entry (split(/&/,$rolesdump)) {
2920: if ($entry!~/^rolesdef_/) {
2921: my ($area,$role)=split(/=/,$entry);
2922: $area=~s/\_\w\w$//;
2923: my ($trole,$tend,$tstart,$group_privs);
2924: if ($role=~/^cr/) {
2925: if ($role=~m|^(cr/$match_domain/$match_username/[a-zA-Z0-9]+)_(.*)$|) {
2926: ($trole,my $trest)=($role=~m|^(cr/$match_domain/$match_username/[a-zA-Z0-9]+)_(.*)$|);
2927: ($tend,$tstart)=split('_',$trest);
2928: } else {
2929: $trole=$role;
2930: }
2931: } elsif ($role =~ m|^gr/|) {
2932: ($trole,$tend,$tstart) = split(/_/,$role);
2933: ($trole,$group_privs) = split(/\//,$trole);
2934: $group_privs = &unescape($group_privs);
2935: } else {
2936: ($trole,$tend,$tstart)=split(/_/,$role);
2937: }
2938: my %new_role = &set_arearole($trole,$area,$tstart,$tend,$domain,
2939: $username);
2940: @userroles{keys(%new_role)} = @new_role{keys(%new_role)};
2941: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2942: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2943: if (($area ne '') && ($trole ne '')) {
2944: my $spec=$trole.'.'.$area;
2945: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2946: if ($trole =~ /^cr\//) {
2947: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2948: } elsif ($trole eq 'gr') {
2949: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
2950: } else {
2951: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2952: }
2953: }
2954: }
2955: }
2956: my ($author,$adv) = &set_userprivs(\%userroles,\%allroles,\%allgroups);
2957: $userroles{'user.adv'} = $adv;
2958: $userroles{'user.author'} = $author;
2959: $env{'user.adv'}=$adv;
2960: }
2961: return \%userroles;
2962: }
2963:
2964: sub set_arearole {
2965: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2966: # log the associated role with the area
2967: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2968: return ('user.role.'.$trole.'.'.$area => $tstart.'.'.$tend);
2969: }
2970:
2971: sub custom_roleprivs {
2972: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2973: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2974: my $homsvr=homeserver($rauthor,$rdomain);
2975: if (&hostname($homsvr) ne '') {
2976: my ($rdummy,$roledef)=
2977: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2978: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2979: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2980: if (defined($syspriv)) {
2981: $$allroles{'cm./'}.=':'.$syspriv;
2982: $$allroles{$spec.'./'}.=':'.$syspriv;
2983: }
2984: if ($tdomain ne '') {
2985: if (defined($dompriv)) {
2986: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2987: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2988: }
2989: if (($trest ne '') && (defined($coursepriv))) {
2990: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2991: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2992: }
2993: }
2994: }
2995: }
2996: }
2997:
2998: sub group_roleprivs {
2999: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
3000: my $access = 1;
3001: my $now = time;
3002: if (($tend!=0) && ($tend<$now)) { $access = 0; }
3003: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
3004: if ($access) {
3005: my ($course,$group) = ($area =~ m|(/$match_domain/$match_courseid)/([^/]+)$|);
3006: $$allgroups{$course}{$group} .=':'.$group_privs;
3007: }
3008: }
3009:
3010: sub standard_roleprivs {
3011: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
3012: if (defined($pr{$trole.':s'})) {
3013: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
3014: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
3015: }
3016: if ($tdomain ne '') {
3017: if (defined($pr{$trole.':d'})) {
3018: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
3019: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
3020: }
3021: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
3022: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
3023: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
3024: }
3025: }
3026: }
3027:
3028: sub set_userprivs {
3029: my ($userroles,$allroles,$allgroups) = @_;
3030: my $author=0;
3031: my $adv=0;
3032: my %grouproles = ();
3033: if (keys(%{$allgroups}) > 0) {
3034: foreach my $role (keys %{$allroles}) {
3035: my ($trole,$area,$sec,$extendedarea);
3036: if ($role =~ m-^(\w+|cr/$match_domain/$match_username/\w+)\.(/$match_domain/$match_courseid)(/?\w*)-) {
3037: $trole = $1;
3038: $area = $2;
3039: $sec = $3;
3040: $extendedarea = $area.$sec;
3041: if (exists($$allgroups{$area})) {
3042: foreach my $group (keys(%{$$allgroups{$area}})) {
3043: my $spec = $trole.'.'.$extendedarea;
3044: $grouproles{$spec.'.'.$area.'/'.$group} =
3045: $$allgroups{$area}{$group};
3046: }
3047: }
3048: }
3049: }
3050: }
3051: foreach my $group (keys(%grouproles)) {
3052: $$allroles{$group} = $grouproles{$group};
3053: }
3054: foreach my $role (keys(%{$allroles})) {
3055: my %thesepriv;
3056: if (($role=~/^au/) || ($role=~/^ca/)) { $author=1; }
3057: foreach my $item (split(/:/,$$allroles{$role})) {
3058: if ($item ne '') {
3059: my ($privilege,$restrictions)=split(/&/,$item);
3060: if ($restrictions eq '') {
3061: $thesepriv{$privilege}='F';
3062: } elsif ($thesepriv{$privilege} ne 'F') {
3063: $thesepriv{$privilege}.=$restrictions;
3064: }
3065: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
3066: }
3067: }
3068: my $thesestr='';
3069: foreach my $priv (keys(%thesepriv)) {
3070: $thesestr.=':'.$priv.'&'.$thesepriv{$priv};
3071: }
3072: $userroles->{'user.priv.'.$role} = $thesestr;
3073: }
3074: return ($author,$adv);
3075: }
3076:
3077: # --------------------------------------------------------------- get interface
3078:
3079: sub get {
3080: my ($namespace,$storearr,$udomain,$uname)=@_;
3081: my $items='';
3082: foreach my $item (@$storearr) {
3083: $items.=&escape($item).'&';
3084: }
3085: $items=~s/\&$//;
3086: if (!$udomain) { $udomain=$env{'user.domain'}; }
3087: if (!$uname) { $uname=$env{'user.name'}; }
3088: my $uhome=&homeserver($uname,$udomain);
3089:
3090: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
3091: my @pairs=split(/\&/,$rep);
3092: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
3093: return @pairs;
3094: }
3095: my %returnhash=();
3096: my $i=0;
3097: foreach my $item (@$storearr) {
3098: $returnhash{$item}=&thaw_unescape($pairs[$i]);
3099: $i++;
3100: }
3101: return %returnhash;
3102: }
3103:
3104: # --------------------------------------------------------------- del interface
3105:
3106: sub del {
3107: my ($namespace,$storearr,$udomain,$uname)=@_;
3108: my $items='';
3109: foreach my $item (@$storearr) {
3110: $items.=&escape($item).'&';
3111: }
3112: $items=~s/\&$//;
3113: if (!$udomain) { $udomain=$env{'user.domain'}; }
3114: if (!$uname) { $uname=$env{'user.name'}; }
3115: my $uhome=&homeserver($uname,$udomain);
3116:
3117: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
3118: }
3119:
3120: # -------------------------------------------------------------- dump interface
3121:
3122: sub dump {
3123: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
3124: if (!$udomain) { $udomain=$env{'user.domain'}; }
3125: if (!$uname) { $uname=$env{'user.name'}; }
3126: my $uhome=&homeserver($uname,$udomain);
3127: if ($regexp) {
3128: $regexp=&escape($regexp);
3129: } else {
3130: $regexp='.';
3131: }
3132: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
3133: my @pairs=split(/\&/,$rep);
3134: my %returnhash=();
3135: foreach my $item (@pairs) {
3136: my ($key,$value)=split(/=/,$item,2);
3137: $key = &unescape($key);
3138: next if ($key =~ /^error: 2 /);
3139: $returnhash{$key}=&thaw_unescape($value);
3140: }
3141: return %returnhash;
3142: }
3143:
3144: # --------------------------------------------------------- dumpstore interface
3145:
3146: sub dumpstore {
3147: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
3148: if (!$udomain) { $udomain=$env{'user.domain'}; }
3149: if (!$uname) { $uname=$env{'user.name'}; }
3150: my $uhome=&homeserver($uname,$udomain);
3151: if ($regexp) {
3152: $regexp=&escape($regexp);
3153: } else {
3154: $regexp='.';
3155: }
3156: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
3157: my @pairs=split(/\&/,$rep);
3158: my %returnhash=();
3159: foreach my $item (@pairs) {
3160: my ($key,$value)=split(/=/,$item,2);
3161: next if ($key =~ /^error: 2 /);
3162: $returnhash{$key}=&thaw_unescape($value);
3163: }
3164: return %returnhash;
3165: }
3166:
3167: # -------------------------------------------------------------- keys interface
3168:
3169: sub getkeys {
3170: my ($namespace,$udomain,$uname)=@_;
3171: if (!$udomain) { $udomain=$env{'user.domain'}; }
3172: if (!$uname) { $uname=$env{'user.name'}; }
3173: my $uhome=&homeserver($uname,$udomain);
3174: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
3175: my @keyarray=();
3176: foreach my $key (split(/\&/,$rep)) {
3177: next if ($key =~ /^error: 2 /);
3178: push(@keyarray,&unescape($key));
3179: }
3180: return @keyarray;
3181: }
3182:
3183: # --------------------------------------------------------------- currentdump
3184: sub currentdump {
3185: my ($courseid,$sdom,$sname)=@_;
3186: $courseid = $env{'request.course.id'} if (! defined($courseid));
3187: $sdom = $env{'user.domain'} if (! defined($sdom));
3188: $sname = $env{'user.name'} if (! defined($sname));
3189: my $uhome = &homeserver($sname,$sdom);
3190: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
3191: return if ($rep =~ /^(error:|no_such_host)/);
3192: #
3193: my %returnhash=();
3194: #
3195: if ($rep eq "unknown_cmd") {
3196: # an old lond will not know currentdump
3197: # Do a dump and make it look like a currentdump
3198: my @tmp = &dumpstore($courseid,$sdom,$sname,'.');
3199: return if ($tmp[0] =~ /^(error:|no_such_host)/);
3200: my %hash = @tmp;
3201: @tmp=();
3202: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
3203: } else {
3204: my @pairs=split(/\&/,$rep);
3205: foreach my $pair (@pairs) {
3206: my ($key,$value)=split(/=/,$pair,2);
3207: my ($symb,$param) = split(/:/,$key);
3208: $returnhash{&unescape($symb)}->{&unescape($param)} =
3209: &thaw_unescape($value);
3210: }
3211: }
3212: return %returnhash;
3213: }
3214:
3215: sub convert_dump_to_currentdump{
3216: my %hash = %{shift()};
3217: my %returnhash;
3218: # Code ripped from lond, essentially. The only difference
3219: # here is the unescaping done by lonnet::dump(). Conceivably
3220: # we might run in to problems with parameter names =~ /^v\./
3221: while (my ($key,$value) = each(%hash)) {
3222: my ($v,$symb,$param) = split(/:/,$key);
3223: $symb = &unescape($symb);
3224: $param = &unescape($param);
3225: next if ($v eq 'version' || $symb eq 'keys');
3226: next if (exists($returnhash{$symb}) &&
3227: exists($returnhash{$symb}->{$param}) &&
3228: $returnhash{$symb}->{'v.'.$param} > $v);
3229: $returnhash{$symb}->{$param}=$value;
3230: $returnhash{$symb}->{'v.'.$param}=$v;
3231: }
3232: #
3233: # Remove all of the keys in the hashes which keep track of
3234: # the version of the parameter.
3235: while (my ($symb,$param_hash) = each(%returnhash)) {
3236: # use a foreach because we are going to delete from the hash.
3237: foreach my $key (keys(%$param_hash)) {
3238: delete($param_hash->{$key}) if ($key =~ /^v\./);
3239: }
3240: }
3241: return \%returnhash;
3242: }
3243:
3244: # ------------------------------------------------------ critical inc interface
3245:
3246: sub cinc {
3247: return &inc(@_,'critical');
3248: }
3249:
3250: # --------------------------------------------------------------- inc interface
3251:
3252: sub inc {
3253: my ($namespace,$store,$udomain,$uname,$critical) = @_;
3254: if (!$udomain) { $udomain=$env{'user.domain'}; }
3255: if (!$uname) { $uname=$env{'user.name'}; }
3256: my $uhome=&homeserver($uname,$udomain);
3257: my $items='';
3258: if (! ref($store)) {
3259: # got a single value, so use that instead
3260: $items = &escape($store).'=&';
3261: } elsif (ref($store) eq 'SCALAR') {
3262: $items = &escape($$store).'=&';
3263: } elsif (ref($store) eq 'ARRAY') {
3264: $items = join('=&',map {&escape($_);} @{$store});
3265: } elsif (ref($store) eq 'HASH') {
3266: while (my($key,$value) = each(%{$store})) {
3267: $items.= &escape($key).'='.&escape($value).'&';
3268: }
3269: }
3270: $items=~s/\&$//;
3271: if ($critical) {
3272: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
3273: } else {
3274: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
3275: }
3276: }
3277:
3278: # --------------------------------------------------------------- put interface
3279:
3280: sub put {
3281: my ($namespace,$storehash,$udomain,$uname)=@_;
3282: if (!$udomain) { $udomain=$env{'user.domain'}; }
3283: if (!$uname) { $uname=$env{'user.name'}; }
3284: my $uhome=&homeserver($uname,$udomain);
3285: my $items='';
3286: foreach my $item (keys(%$storehash)) {
3287: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3288: }
3289: $items=~s/\&$//;
3290: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3291: }
3292:
3293: # ------------------------------------------------------------ newput interface
3294:
3295: sub newput {
3296: my ($namespace,$storehash,$udomain,$uname)=@_;
3297: if (!$udomain) { $udomain=$env{'user.domain'}; }
3298: if (!$uname) { $uname=$env{'user.name'}; }
3299: my $uhome=&homeserver($uname,$udomain);
3300: my $items='';
3301: foreach my $key (keys(%$storehash)) {
3302: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3303: }
3304: $items=~s/\&$//;
3305: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
3306: }
3307:
3308: # --------------------------------------------------------- putstore interface
3309:
3310: sub putstore {
3311: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3312: if (!$udomain) { $udomain=$env{'user.domain'}; }
3313: if (!$uname) { $uname=$env{'user.name'}; }
3314: my $uhome=&homeserver($uname,$udomain);
3315: my $items='';
3316: foreach my $key (keys(%$storehash)) {
3317: $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
3318: }
3319: $items=~s/\&$//;
3320: my $esc_symb=&escape($symb);
3321: my $esc_v=&escape($version);
3322: my $reply =
3323: &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
3324: $uhome);
3325: if ($reply eq 'unknown_cmd') {
3326: # gfall back to way things use to be done
3327: return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
3328: $uname);
3329: }
3330: return $reply;
3331: }
3332:
3333: sub old_putstore {
3334: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3335: if (!$udomain) { $udomain=$env{'user.domain'}; }
3336: if (!$uname) { $uname=$env{'user.name'}; }
3337: my $uhome=&homeserver($uname,$udomain);
3338: my %newstorehash;
3339: foreach my $item (keys(%$storehash)) {
3340: my $key = $version.':'.&escape($symb).':'.$item;
3341: $newstorehash{$key} = $storehash->{$item};
3342: }
3343: my $items='';
3344: my %allitems = ();
3345: foreach my $item (keys(%newstorehash)) {
3346: if ($item =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
3347: my $key = $1.':keys:'.$2;
3348: $allitems{$key} .= $3.':';
3349: }
3350: $items.=$item.'='.&freeze_escape($newstorehash{$item}).'&';
3351: }
3352: foreach my $item (keys(%allitems)) {
3353: $allitems{$item} =~ s/\:$//;
3354: $items.= $item.'='.$allitems{$item}.'&';
3355: }
3356: $items=~s/\&$//;
3357: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3358: }
3359:
3360: # ------------------------------------------------------ critical put interface
3361:
3362: sub cput {
3363: my ($namespace,$storehash,$udomain,$uname)=@_;
3364: if (!$udomain) { $udomain=$env{'user.domain'}; }
3365: if (!$uname) { $uname=$env{'user.name'}; }
3366: my $uhome=&homeserver($uname,$udomain);
3367: my $items='';
3368: foreach my $item (keys(%$storehash)) {
3369: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3370: }
3371: $items=~s/\&$//;
3372: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
3373: }
3374:
3375: # -------------------------------------------------------------- eget interface
3376:
3377: sub eget {
3378: my ($namespace,$storearr,$udomain,$uname)=@_;
3379: my $items='';
3380: foreach my $item (@$storearr) {
3381: $items.=&escape($item).'&';
3382: }
3383: $items=~s/\&$//;
3384: if (!$udomain) { $udomain=$env{'user.domain'}; }
3385: if (!$uname) { $uname=$env{'user.name'}; }
3386: my $uhome=&homeserver($uname,$udomain);
3387: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3388: my @pairs=split(/\&/,$rep);
3389: my %returnhash=();
3390: my $i=0;
3391: foreach my $item (@$storearr) {
3392: $returnhash{$item}=&thaw_unescape($pairs[$i]);
3393: $i++;
3394: }
3395: return %returnhash;
3396: }
3397:
3398: # ------------------------------------------------------------ tmpput interface
3399: sub tmpput {
3400: my ($storehash,$server,$context)=@_;
3401: my $items='';
3402: foreach my $item (keys(%$storehash)) {
3403: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3404: }
3405: $items=~s/\&$//;
3406: if (defined($context)) {
3407: $items .= ':'.&escape($context);
3408: }
3409: return &reply("tmpput:$items",$server);
3410: }
3411:
3412: # ------------------------------------------------------------ tmpget interface
3413: sub tmpget {
3414: my ($token,$server)=@_;
3415: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3416: my $rep=&reply("tmpget:$token",$server);
3417: my %returnhash;
3418: foreach my $item (split(/\&/,$rep)) {
3419: my ($key,$value)=split(/=/,$item);
3420: $returnhash{&unescape($key)}=&thaw_unescape($value);
3421: }
3422: return %returnhash;
3423: }
3424:
3425: # ------------------------------------------------------------ tmpget interface
3426: sub tmpdel {
3427: my ($token,$server)=@_;
3428: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3429: return &reply("tmpdel:$token",$server);
3430: }
3431:
3432: # -------------------------------------------------- portfolio access checking
3433:
3434: sub portfolio_access {
3435: my ($requrl) = @_;
3436: my (undef,$udom,$unum,$file_name,$group) = &parse_portfolio_url($requrl);
3437: my $result = &get_portfolio_access($udom,$unum,$file_name,$group);
3438: if ($result) {
3439: my %setters;
3440: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3441: my ($startblock,$endblock) =
3442: &Apache::loncommon::blockcheck(\%setters,'port',$unum,$udom);
3443: if ($startblock && $endblock) {
3444: return 'B';
3445: }
3446: } else {
3447: my ($startblock,$endblock) =
3448: &Apache::loncommon::blockcheck(\%setters,'port');
3449: if ($startblock && $endblock) {
3450: return 'B';
3451: }
3452: }
3453: }
3454: if ($result eq 'ok') {
3455: return 'F';
3456: } elsif ($result =~ /^[^:]+:guest_/) {
3457: return 'A';
3458: }
3459: return '';
3460: }
3461:
3462: sub get_portfolio_access {
3463: my ($udom,$unum,$file_name,$group,$access_hash) = @_;
3464:
3465: if (!ref($access_hash)) {
3466: my $current_perms = &get_portfile_permissions($udom,$unum);
3467: my %access_controls = &get_access_controls($current_perms,$group,
3468: $file_name);
3469: $access_hash = $access_controls{$file_name};
3470: }
3471:
3472: my ($public,$guest,@domains,@users,@courses,@groups);
3473: my $now = time;
3474: if (ref($access_hash) eq 'HASH') {
3475: foreach my $key (keys(%{$access_hash})) {
3476: my ($num,$scope,$end,$start) = ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
3477: if ($start > $now) {
3478: next;
3479: }
3480: if ($end && $end<$now) {
3481: next;
3482: }
3483: if ($scope eq 'public') {
3484: $public = $key;
3485: last;
3486: } elsif ($scope eq 'guest') {
3487: $guest = $key;
3488: } elsif ($scope eq 'domains') {
3489: push(@domains,$key);
3490: } elsif ($scope eq 'users') {
3491: push(@users,$key);
3492: } elsif ($scope eq 'course') {
3493: push(@courses,$key);
3494: } elsif ($scope eq 'group') {
3495: push(@groups,$key);
3496: }
3497: }
3498: if ($public) {
3499: return 'ok';
3500: }
3501: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3502: if ($guest) {
3503: return $guest;
3504: }
3505: } else {
3506: if (@domains > 0) {
3507: foreach my $domkey (@domains) {
3508: if (ref($access_hash->{$domkey}{'dom'}) eq 'ARRAY') {
3509: if (grep(/^\Q$env{'user.domain'}\E$/,@{$access_hash->{$domkey}{'dom'}})) {
3510: return 'ok';
3511: }
3512: }
3513: }
3514: }
3515: if (@users > 0) {
3516: foreach my $userkey (@users) {
3517: if (exists($access_hash->{$userkey}{'users'}{$env{'user.name'}.':'.$env{'user.domain'}})) {
3518: return 'ok';
3519: }
3520: }
3521: }
3522: my %roleshash;
3523: my @courses_and_groups = @courses;
3524: push(@courses_and_groups,@groups);
3525: if (@courses_and_groups > 0) {
3526: my (%allgroups,%allroles);
3527: my ($start,$end,$role,$sec,$group);
3528: foreach my $envkey (%env) {
3529: if ($envkey =~ m-^user\.role\.(gr|cc|in|ta|ep|st)\./($match_domain)/($match_courseid)/?([^/]*)$-) {
3530: my $cid = $2.'_'.$3;
3531: if ($1 eq 'gr') {
3532: $group = $4;
3533: $allgroups{$cid}{$group} = $env{$envkey};
3534: } else {
3535: if ($4 eq '') {
3536: $sec = 'none';
3537: } else {
3538: $sec = $4;
3539: }
3540: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3541: }
3542: } elsif ($envkey =~ m-^user\.role\./cr/($match_domain/$match_username/\w*)./($match_domain)/($match_courseid)/?([^/]*)$-) {
3543: my $cid = $2.'_'.$3;
3544: if ($4 eq '') {
3545: $sec = 'none';
3546: } else {
3547: $sec = $4;
3548: }
3549: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3550: }
3551: }
3552: if (keys(%allroles) == 0) {
3553: return;
3554: }
3555: foreach my $key (@courses_and_groups) {
3556: my %content = %{$$access_hash{$key}};
3557: my $cnum = $content{'number'};
3558: my $cdom = $content{'domain'};
3559: my $cid = $cdom.'_'.$cnum;
3560: if (!exists($allroles{$cid})) {
3561: next;
3562: }
3563: foreach my $role_id (keys(%{$content{'roles'}})) {
3564: my @sections = @{$content{'roles'}{$role_id}{'section'}};
3565: my @groups = @{$content{'roles'}{$role_id}{'group'}};
3566: my @status = @{$content{'roles'}{$role_id}{'access'}};
3567: my @roles = @{$content{'roles'}{$role_id}{'role'}};
3568: foreach my $role (keys(%{$allroles{$cid}})) {
3569: if ((grep/^all$/,@roles) || (grep/^\Q$role\E$/,@roles)) {
3570: foreach my $sec (keys(%{$allroles{$cid}{$role}})) {
3571: if (&course_group_datechecker($allroles{$cid}{$role}{$sec},$now,\@status) eq 'ok') {
3572: if (grep/^all$/,@sections) {
3573: return 'ok';
3574: } else {
3575: if (grep/^$sec$/,@sections) {
3576: return 'ok';
3577: }
3578: }
3579: }
3580: }
3581: if (keys(%{$allgroups{$cid}}) == 0) {
3582: if (grep/^none$/,@groups) {
3583: return 'ok';
3584: }
3585: } else {
3586: if (grep/^all$/,@groups) {
3587: return 'ok';
3588: }
3589: foreach my $group (keys(%{$allgroups{$cid}})) {
3590: if (grep/^$group$/,@groups) {
3591: return 'ok';
3592: }
3593: }
3594: }
3595: }
3596: }
3597: }
3598: }
3599: }
3600: if ($guest) {
3601: return $guest;
3602: }
3603: }
3604: }
3605: return;
3606: }
3607:
3608: sub course_group_datechecker {
3609: my ($dates,$now,$status) = @_;
3610: my ($start,$end) = split(/\./,$dates);
3611: if (!$start && !$end) {
3612: return 'ok';
3613: }
3614: if (grep/^active$/,@{$status}) {
3615: if (((!$start) || ($start && $start <= $now)) && ((!$end) || ($end && $end >= $now))) {
3616: return 'ok';
3617: }
3618: }
3619: if (grep/^previous$/,@{$status}) {
3620: if ($end > $now ) {
3621: return 'ok';
3622: }
3623: }
3624: if (grep/^future$/,@{$status}) {
3625: if ($start > $now) {
3626: return 'ok';
3627: }
3628: }
3629: return;
3630: }
3631:
3632: sub parse_portfolio_url {
3633: my ($url) = @_;
3634:
3635: my ($type,$udom,$unum,$group,$file_name);
3636:
3637: if ($url =~ m-^/*(?:uploaded|editupload)/($match_domain)/($match_username)/portfolio(/.+)$-) {
3638: $type = 1;
3639: $udom = $1;
3640: $unum = $2;
3641: $file_name = $3;
3642: } elsif ($url =~ m-^/*(?:uploaded|editupload)/($match_domain)/($match_courseid)/groups/([^/]+)/portfolio/(.+)$-) {
3643: $type = 2;
3644: $udom = $1;
3645: $unum = $2;
3646: $group = $3;
3647: $file_name = $3.'/'.$4;
3648: }
3649: if (wantarray) {
3650: return ($type,$udom,$unum,$file_name,$group);
3651: }
3652: return $type;
3653: }
3654:
3655: sub is_portfolio_url {
3656: my ($url) = @_;
3657: return scalar(&parse_portfolio_url($url));
3658: }
3659:
3660: sub is_portfolio_file {
3661: my ($file) = @_;
3662: if (($file =~ /^portfolio/) || ($file =~ /^groups\/\w+\/portfolio/)) {
3663: return 1;
3664: }
3665: return;
3666: }
3667:
3668:
3669: # ---------------------------------------------- Custom access rule evaluation
3670:
3671: sub customaccess {
3672: my ($priv,$uri)=@_;
3673: my ($urole,$urealm)=split(/\./,$env{'request.role'},2);
3674: my (undef,$udom,$ucrs,$usec)=split(/\//,$urealm);
3675: $udom = &LONCAPA::clean_domain($udom);
3676: $ucrs = &LONCAPA::clean_username($ucrs);
3677: my $access=0;
3678: foreach my $right (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
3679: my ($effect,$realm,$role)=split(/\:/,$right);
3680: if ($role) {
3681: if ($role ne $urole) { next; }
3682: }
3683: foreach my $scope (split(/\s*\,\s*/,$realm)) {
3684: my ($tdom,$tcrs,$tsec)=split(/\_/,$scope);
3685: if ($tdom) {
3686: if ($tdom ne $udom) { next; }
3687: }
3688: if ($tcrs) {
3689: if ($tcrs ne $ucrs) { next; }
3690: }
3691: if ($tsec) {
3692: if ($tsec ne $usec) { next; }
3693: }
3694: $access=($effect eq 'allow');
3695: last;
3696: }
3697: if ($realm eq '' && $role eq '') {
3698: $access=($effect eq 'allow');
3699: }
3700: }
3701: return $access;
3702: }
3703:
3704: # ------------------------------------------------- Check for a user privilege
3705:
3706: sub allowed {
3707: my ($priv,$uri,$symb,$role)=@_;
3708: my $ver_orguri=$uri;
3709: $uri=&deversion($uri);
3710: my $orguri=$uri;
3711: $uri=&declutter($uri);
3712:
3713: if ($priv eq 'evb') {
3714: # Evade communication block restrictions for specified role in a course
3715: if ($env{'user.priv.'.$role} =~/evb\&([^\:]*)/) {
3716: return $1;
3717: } else {
3718: return;
3719: }
3720: }
3721:
3722: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3723: # Free bre access to adm and meta resources
3724: if (((($uri=~/^adm\//) && ($uri !~ m{/(?:smppg|bulletinboard)$}))
3725: || (($uri=~/\.meta$/) && ($uri!~m|^uploaded/|) ))
3726: && ($priv eq 'bre')) {
3727: return 'F';
3728: }
3729:
3730: # Free bre access to user's own portfolio contents
3731: my ($space,$domain,$name,@dir)=split('/',$uri);
3732: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3733: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
3734: my %setters;
3735: my ($startblock,$endblock) =
3736: &Apache::loncommon::blockcheck(\%setters,'port');
3737: if ($startblock && $endblock) {
3738: return 'B';
3739: } else {
3740: return 'F';
3741: }
3742: }
3743:
3744: # bre access to group portfolio for rgf priv in group, or mdg or vcg in course.
3745: if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
3746: && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
3747: if (exists($env{'request.course.id'})) {
3748: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
3749: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
3750: if (($domain eq $cdom) && ($name eq $cnum)) {
3751: my $courseprivid=$env{'request.course.id'};
3752: $courseprivid=~s/\_/\//;
3753: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
3754: .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
3755: return $1;
3756: } else {
3757: if ($env{'request.course.sec'}) {
3758: $courseprivid.='/'.$env{'request.course.sec'};
3759: }
3760: if ($env{'user.priv.'.$env{'request.role'}.'./'.
3761: $courseprivid} =~/(mdg|vcg)\&([^\:]*)/) {
3762: return $2;
3763: }
3764: }
3765: }
3766: }
3767: }
3768:
3769: # Free bre to public access
3770:
3771: if ($priv eq 'bre') {
3772: my $copyright=&metadata($uri,'copyright');
3773: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3774: return 'F';
3775: }
3776: if ($copyright eq 'priv') {
3777: $uri=~/([^\/]+)\/([^\/]+)\//;
3778: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3779: return '';
3780: }
3781: }
3782: if ($copyright eq 'domain') {
3783: $uri=~/([^\/]+)\/([^\/]+)\//;
3784: unless (($env{'user.domain'} eq $1) ||
3785: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3786: return '';
3787: }
3788: }
3789: if ($env{'request.role'}=~ /li\.\//) {
3790: # Library role, so allow browsing of resources in this domain.
3791: return 'F';
3792: }
3793: if ($copyright eq 'custom') {
3794: unless (&customaccess($priv,$uri)) { return ''; }
3795: }
3796: }
3797: # Domain coordinator is trying to create a course
3798: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3799: # uri is the requested domain in this case.
3800: # comparison to 'request.role.domain' shows if the user has selected
3801: # a role of dc for the domain in question.
3802: return 'F' if ($uri eq $env{'request.role.domain'});
3803: }
3804:
3805: my $thisallowed='';
3806: my $statecond=0;
3807: my $courseprivid='';
3808:
3809: # Course
3810:
3811: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3812: $thisallowed.=$1;
3813: }
3814:
3815: # Domain
3816:
3817: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3818: =~/\Q$priv\E\&([^\:]*)/) {
3819: $thisallowed.=$1;
3820: }
3821:
3822: # Course: uri itself is a course
3823: my $courseuri=$uri;
3824: $courseuri=~s/\_(\d)/\/$1/;
3825: $courseuri=~s/^([^\/])/\/$1/;
3826:
3827: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3828: =~/\Q$priv\E\&([^\:]*)/) {
3829: $thisallowed.=$1;
3830: }
3831:
3832: # URI is an uploaded document for this course, default permissions don't matter
3833: # not allowing 'edit' access (editupload) to uploaded course docs
3834: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3835: $thisallowed='';
3836: my ($match)=&is_on_map($uri);
3837: if ($match) {
3838: if ($env{'user.priv.'.$env{'request.role'}.'./'}
3839: =~/\Q$priv\E\&([^\:]*)/) {
3840: $thisallowed.=$1;
3841: }
3842: } else {
3843: my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
3844: if ($refuri) {
3845: if ($refuri =~ m|^/adm/|) {
3846: $thisallowed='F';
3847: } else {
3848: $refuri=&declutter($refuri);
3849: my ($match) = &is_on_map($refuri);
3850: if ($match) {
3851: $thisallowed='F';
3852: }
3853: }
3854: }
3855: }
3856: }
3857:
3858: if ($priv eq 'bre'
3859: && $thisallowed ne 'F'
3860: && $thisallowed ne '2'
3861: && &is_portfolio_url($uri)) {
3862: $thisallowed = &portfolio_access($uri);
3863: }
3864:
3865: # Full access at system, domain or course-wide level? Exit.
3866:
3867: if ($thisallowed=~/F/) {
3868: return 'F';
3869: }
3870:
3871: # If this is generating or modifying users, exit with special codes
3872:
3873: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3874: if (($priv eq 'cca') || ($priv eq 'caa')) {
3875: my ($audom,$auname)=split('/',$uri);
3876: # no author name given, so this just checks on the general right to make a co-author in this domain
3877: unless ($auname) { return $thisallowed; }
3878: # an author name is given, so we are about to actually make a co-author for a certain account
3879: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3880: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3881: ($audom ne $env{'request.role.domain'}))) { return ''; }
3882: }
3883: return $thisallowed;
3884: }
3885: #
3886: # Gathered so far: system, domain and course wide privileges
3887: #
3888: # Course: See if uri or referer is an individual resource that is part of
3889: # the course
3890:
3891: if ($env{'request.course.id'}) {
3892:
3893: $courseprivid=$env{'request.course.id'};
3894: if ($env{'request.course.sec'}) {
3895: $courseprivid.='/'.$env{'request.course.sec'};
3896: }
3897: $courseprivid=~s/\_/\//;
3898: my $checkreferer=1;
3899: my ($match,$cond)=&is_on_map($uri);
3900: if ($match) {
3901: $statecond=$cond;
3902: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3903: =~/\Q$priv\E\&([^\:]*)/) {
3904: $thisallowed.=$1;
3905: $checkreferer=0;
3906: }
3907: }
3908:
3909: if ($checkreferer) {
3910: my $refuri=$env{'httpref.'.$orguri};
3911: unless ($refuri) {
3912: foreach my $key (keys(%env)) {
3913: if ($key=~/^httpref\..*\*/) {
3914: my $pattern=$key;
3915: $pattern=~s/^httpref\.\/res\///;
3916: $pattern=~s/\*/\[\^\/\]\+/g;
3917: $pattern=~s/\//\\\//g;
3918: if ($orguri=~/$pattern/) {
3919: $refuri=$env{$key};
3920: }
3921: }
3922: }
3923: }
3924:
3925: if ($refuri) {
3926: $refuri=&declutter($refuri);
3927: my ($match,$cond)=&is_on_map($refuri);
3928: if ($match) {
3929: my $refstatecond=$cond;
3930: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3931: =~/\Q$priv\E\&([^\:]*)/) {
3932: $thisallowed.=$1;
3933: $uri=$refuri;
3934: $statecond=$refstatecond;
3935: }
3936: }
3937: }
3938: }
3939: }
3940:
3941: #
3942: # Gathered now: all privileges that could apply, and condition number
3943: #
3944: #
3945: # Full or no access?
3946: #
3947:
3948: if ($thisallowed=~/F/) {
3949: return 'F';
3950: }
3951:
3952: unless ($thisallowed) {
3953: return '';
3954: }
3955:
3956: # Restrictions exist, deal with them
3957: #
3958: # C:according to course preferences
3959: # R:according to resource settings
3960: # L:unless locked
3961: # X:according to user session state
3962: #
3963:
3964: # Possibly locked functionality, check all courses
3965: # Locks might take effect only after 10 minutes cache expiration for other
3966: # courses, and 2 minutes for current course
3967:
3968: my $envkey;
3969: if ($thisallowed=~/L/) {
3970: foreach $envkey (keys %env) {
3971: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3972: my $courseid=$2;
3973: my $roleid=$1.'.'.$2;
3974: $courseid=~s/^\///;
3975: my $expiretime=600;
3976: if ($env{'request.role'} eq $roleid) {
3977: $expiretime=120;
3978: }
3979: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3980: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3981: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3982: &coursedescription($courseid,{'freshen_cache' => 1});
3983: }
3984: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3985: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3986: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3987: &log($env{'user.domain'},$env{'user.name'},
3988: $env{'user.home'},
3989: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3990: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3991: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3992: return '';
3993: }
3994: }
3995: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3996: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3997: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3998: &log($env{'user.domain'},$env{'user.name'},
3999: $env{'user.home'},
4000: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
4001: $cdom.'/'.$cnum.'/'.$csec.' expire '.
4002: $env{$prefix.'priv.'.$priv.'.lock.expire'});
4003: return '';
4004: }
4005: }
4006: }
4007: }
4008: }
4009:
4010: #
4011: # Rest of the restrictions depend on selected course
4012: #
4013:
4014: unless ($env{'request.course.id'}) {
4015: if ($thisallowed eq 'A') {
4016: return 'A';
4017: } elsif ($thisallowed eq 'B') {
4018: return 'B';
4019: } else {
4020: return '1';
4021: }
4022: }
4023:
4024: #
4025: # Now user is definitely in a course
4026: #
4027:
4028:
4029: # Course preferences
4030:
4031: if ($thisallowed=~/C/) {
4032: my $rolecode=(split(/\./,$env{'request.role'}))[0];
4033: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
4034: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
4035: =~/\Q$rolecode\E/) {
4036: if ($priv ne 'pch') {
4037: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
4038: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
4039: $env{'request.course.id'});
4040: }
4041: return '';
4042: }
4043:
4044: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
4045: =~/\Q$unamedom\E/) {
4046: if ($priv ne 'pch') {
4047: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
4048: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
4049: $env{'request.course.id'});
4050: }
4051: return '';
4052: }
4053: }
4054:
4055: # Resource preferences
4056:
4057: if ($thisallowed=~/R/) {
4058: my $rolecode=(split(/\./,$env{'request.role'}))[0];
4059: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
4060: if ($priv ne 'pch') {
4061: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
4062: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
4063: }
4064: return '';
4065: }
4066: }
4067:
4068: # Restricted by state or randomout?
4069:
4070: if ($thisallowed=~/X/) {
4071: if ($env{'acc.randomout'}) {
4072: if (!$symb) { $symb=&symbread($uri,1); }
4073: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
4074: return '';
4075: }
4076: }
4077: if (&condval($statecond)) {
4078: return '2';
4079: } else {
4080: return '';
4081: }
4082: }
4083:
4084: if ($thisallowed eq 'A') {
4085: return 'A';
4086: } elsif ($thisallowed eq 'B') {
4087: return 'B';
4088: }
4089: return 'F';
4090: }
4091:
4092: sub split_uri_for_cond {
4093: my $uri=&deversion(&declutter(shift));
4094: my @uriparts=split(/\//,$uri);
4095: my $filename=pop(@uriparts);
4096: my $pathname=join('/',@uriparts);
4097: return ($pathname,$filename);
4098: }
4099: # --------------------------------------------------- Is a resource on the map?
4100:
4101: sub is_on_map {
4102: my ($pathname,$filename) = &split_uri_for_cond(shift);
4103: #Trying to find the conditional for the file
4104: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
4105: /\&\Q$filename\E\:([\d\|]+)\&/);
4106: if ($match) {
4107: return (1,$1);
4108: } else {
4109: return (0,0);
4110: }
4111: }
4112:
4113: # --------------------------------------------------------- Get symb from alias
4114:
4115: sub get_symb_from_alias {
4116: my $symb=shift;
4117: my ($map,$resid,$url)=&decode_symb($symb);
4118: # Already is a symb
4119: if ($url) { return $symb; }
4120: # Must be an alias
4121: my $aliassymb='';
4122: my %bighash;
4123: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4124: &GDBM_READER(),0640)) {
4125: my $rid=$bighash{'mapalias_'.$symb};
4126: if ($rid) {
4127: my ($mapid,$resid)=split(/\./,$rid);
4128: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
4129: $resid,$bighash{'src_'.$rid});
4130: }
4131: untie %bighash;
4132: }
4133: return $aliassymb;
4134: }
4135:
4136: # ----------------------------------------------------------------- Define Role
4137:
4138: sub definerole {
4139: if (allowed('mcr','/')) {
4140: my ($rolename,$sysrole,$domrole,$courole)=@_;
4141: foreach my $role (split(':',$sysrole)) {
4142: my ($crole,$cqual)=split(/\&/,$role);
4143: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
4144: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
4145: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
4146: return "refused:s:$crole&$cqual";
4147: }
4148: }
4149: }
4150: foreach my $role (split(':',$domrole)) {
4151: my ($crole,$cqual)=split(/\&/,$role);
4152: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
4153: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
4154: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
4155: return "refused:d:$crole&$cqual";
4156: }
4157: }
4158: }
4159: foreach my $role (split(':',$courole)) {
4160: my ($crole,$cqual)=split(/\&/,$role);
4161: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
4162: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
4163: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
4164: return "refused:c:$crole&$cqual";
4165: }
4166: }
4167: }
4168: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4169: "$env{'user.domain'}:$env{'user.name'}:".
4170: "rolesdef_$rolename=".
4171: escape($sysrole.'_'.$domrole.'_'.$courole);
4172: return reply($command,$env{'user.home'});
4173: } else {
4174: return 'refused';
4175: }
4176: }
4177:
4178: # ---------------- Make a metadata query against the network of library servers
4179:
4180: sub metadata_query {
4181: my ($query,$custom,$customshow,$server_array)=@_;
4182: my %rhash;
4183: my %libserv = &all_library();
4184: my @server_list = (defined($server_array) ? @$server_array
4185: : keys(%libserv) );
4186: for my $server (@server_list) {
4187: unless ($custom or $customshow) {
4188: my $reply=&reply("querysend:".&escape($query),$server);
4189: $rhash{$server}=$reply;
4190: }
4191: else {
4192: my $reply=&reply("querysend:".&escape($query).':'.
4193: &escape($custom).':'.&escape($customshow),
4194: $server);
4195: $rhash{$server}=$reply;
4196: }
4197: }
4198: return \%rhash;
4199: }
4200:
4201: # ----------------------------------------- Send log queries and wait for reply
4202:
4203: sub log_query {
4204: my ($uname,$udom,$query,%filters)=@_;
4205: my $uhome=&homeserver($uname,$udom);
4206: if ($uhome eq 'no_host') { return 'error: no_host'; }
4207: my $uhost=&hostname($uhome);
4208: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys(%filters)));
4209: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
4210: $uhome);
4211: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
4212: return get_query_reply($queryid);
4213: }
4214:
4215: # -------------------------- Update MySQL table for portfolio file
4216:
4217: sub update_portfolio_table {
4218: my ($uname,$udom,$file_name,$query,$group,$action) = @_;
4219: my $homeserver = &homeserver($uname,$udom);
4220: my $queryid=
4221: &reply("querysend:".$query.':'.&escape($uname.':'.$udom.':'.$group).
4222: ':'.&escape($file_name).':'.$action,$homeserver);
4223: my $reply = &get_query_reply($queryid);
4224: return $reply;
4225: }
4226:
4227: # ------- Request retrieval of institutional classlists for course(s)
4228:
4229: sub fetch_enrollment_query {
4230: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
4231: my $homeserver;
4232: my $maxtries = 1;
4233: if ($context eq 'automated') {
4234: $homeserver = $perlvar{'lonHostID'};
4235: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
4236: } else {
4237: $homeserver = &homeserver($cnum,$dom);
4238: }
4239: my $host=&hostname($homeserver);
4240: my $cmd = '';
4241: foreach my $affiliate (keys %{$affiliatesref}) {
4242: $cmd .= $affiliate.'='.join(",",@{$$affiliatesref{$affiliate}}).'%%';
4243: }
4244: $cmd =~ s/%%$//;
4245: $cmd = &escape($cmd);
4246: my $query = 'fetchenrollment';
4247: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
4248: unless ($queryid=~/^\Q$host\E\_/) {
4249: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
4250: return 'error: '.$queryid;
4251: }
4252: my $reply = &get_query_reply($queryid);
4253: my $tries = 1;
4254: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4255: $reply = &get_query_reply($queryid);
4256: $tries ++;
4257: }
4258: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4259: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4260: } else {
4261: my @responses = split/:/,$reply;
4262: if ($homeserver eq $perlvar{'lonHostID'}) {
4263: foreach my $line (@responses) {
4264: my ($key,$value) = split(/=/,$line,2);
4265: $$replyref{$key} = $value;
4266: }
4267: } else {
4268: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
4269: foreach my $line (@responses) {
4270: my ($key,$value) = split(/=/,$line);
4271: $$replyref{$key} = $value;
4272: if ($value > 0) {
4273: foreach my $item (@{$$affiliatesref{$key}}) {
4274: my $filename = $dom.'_'.$key.'_'.$item.'_classlist.xml';
4275: my $destname = $pathname.'/'.$filename;
4276: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
4277: if ($xml_classlist =~ /^error/) {
4278: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
4279: } else {
4280: if ( open(FILE,">$destname") ) {
4281: print FILE &unescape($xml_classlist);
4282: close(FILE);
4283: } else {
4284: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
4285: }
4286: }
4287: }
4288: }
4289: }
4290: }
4291: return 'ok';
4292: }
4293: return 'error';
4294: }
4295:
4296: sub get_query_reply {
4297: my $queryid=shift;
4298: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
4299: my $reply='';
4300: for (1..100) {
4301: sleep 2;
4302: if (-e $replyfile.'.end') {
4303: if (open(my $fh,$replyfile)) {
4304: $reply.=<$fh>;
4305: close($fh);
4306: } else { return 'error: reply_file_error'; }
4307: return &unescape($reply);
4308: }
4309: }
4310: return 'timeout:'.$queryid;
4311: }
4312:
4313: sub courselog_query {
4314: #
4315: # possible filters:
4316: # url: url or symb
4317: # username
4318: # domain
4319: # action: view, submit, grade
4320: # start: timestamp
4321: # end: timestamp
4322: #
4323: my (%filters)=@_;
4324: unless ($env{'request.course.id'}) { return 'no_course'; }
4325: if ($filters{'url'}) {
4326: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
4327: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
4328: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
4329: }
4330: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
4331: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
4332: return &log_query($cname,$cdom,'courselog',%filters);
4333: }
4334:
4335: sub userlog_query {
4336: my ($uname,$udom,%filters)=@_;
4337: return &log_query($uname,$udom,'userlog',%filters);
4338: }
4339:
4340: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
4341:
4342: sub auto_run {
4343: my ($cnum,$cdom) = @_;
4344: my $homeserver = &homeserver($cnum,$cdom);
4345: my $response = &reply('autorun:'.$cdom,$homeserver);
4346: return $response;
4347: }
4348:
4349: sub auto_get_sections {
4350: my ($cnum,$cdom,$inst_coursecode) = @_;
4351: my $homeserver = &homeserver($cnum,$cdom);
4352: my @secs = ();
4353: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
4354: unless ($response eq 'refused') {
4355: @secs = split/:/,$response;
4356: }
4357: return @secs;
4358: }
4359:
4360: sub auto_new_course {
4361: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
4362: my $homeserver = &homeserver($cnum,$cdom);
4363: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
4364: return $response;
4365: }
4366:
4367: sub auto_validate_courseID {
4368: my ($cnum,$cdom,$inst_course_id) = @_;
4369: my $homeserver = &homeserver($cnum,$cdom);
4370: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
4371: return $response;
4372: }
4373:
4374: sub auto_create_password {
4375: my ($cnum,$cdom,$authparam) = @_;
4376: my $homeserver = &homeserver($cnum,$cdom);
4377: my $create_passwd = 0;
4378: my $authchk = '';
4379: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
4380: if ($response eq 'refused') {
4381: $authchk = 'refused';
4382: } else {
4383: ($authparam,$create_passwd,$authchk) = split/:/,$response;
4384: }
4385: return ($authparam,$create_passwd,$authchk);
4386: }
4387:
4388: sub auto_photo_permission {
4389: my ($cnum,$cdom,$students) = @_;
4390: my $homeserver = &homeserver($cnum,$cdom);
4391: my ($outcome,$perm_reqd,$conditions) =
4392: split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
4393: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4394: return (undef,undef);
4395: }
4396: return ($outcome,$perm_reqd,$conditions);
4397: }
4398:
4399: sub auto_checkphotos {
4400: my ($uname,$udom,$pid) = @_;
4401: my $homeserver = &homeserver($uname,$udom);
4402: my ($result,$resulttype);
4403: my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
4404: &escape($uname).':'.&escape($pid),
4405: $homeserver));
4406: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4407: return (undef,undef);
4408: }
4409: if ($outcome) {
4410: ($result,$resulttype) = split(/:/,$outcome);
4411: }
4412: return ($result,$resulttype);
4413: }
4414:
4415: sub auto_photochoice {
4416: my ($cnum,$cdom) = @_;
4417: my $homeserver = &homeserver($cnum,$cdom);
4418: my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
4419: &escape($cdom),
4420: $homeserver)));
4421: if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4422: return (undef,undef);
4423: }
4424: return ($update,$comment);
4425: }
4426:
4427: sub auto_photoupdate {
4428: my ($affiliatesref,$dom,$cnum,$photo) = @_;
4429: my $homeserver = &homeserver($cnum,$dom);
4430: my $host=&hostname($homeserver);
4431: my $cmd = '';
4432: my $maxtries = 1;
4433: foreach my $affiliate (keys(%{$affiliatesref})) {
4434: $cmd .= $affiliate.'='.join(",",@{$$affiliatesref{$affiliate}}).'%%';
4435: }
4436: $cmd =~ s/%%$//;
4437: $cmd = &escape($cmd);
4438: my $query = 'institutionalphotos';
4439: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
4440: unless ($queryid=~/^\Q$host\E\_/) {
4441: &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
4442: return 'error: '.$queryid;
4443: }
4444: my $reply = &get_query_reply($queryid);
4445: my $tries = 1;
4446: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4447: $reply = &get_query_reply($queryid);
4448: $tries ++;
4449: }
4450: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4451: &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4452: } else {
4453: my @responses = split(/:/,$reply);
4454: my $outcome = shift(@responses);
4455: foreach my $item (@responses) {
4456: my ($key,$value) = split(/=/,$item);
4457: $$photo{$key} = $value;
4458: }
4459: return $outcome;
4460: }
4461: return 'error';
4462: }
4463:
4464: sub auto_instcode_format {
4465: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,
4466: $cat_order) = @_;
4467: my $courses = '';
4468: my @homeservers;
4469: if ($caller eq 'global') {
4470: my %servers = &get_servers($codedom,'library');
4471: foreach my $tryserver (keys(%servers)) {
4472: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4473: push(@homeservers,$tryserver);
4474: }
4475: }
4476: } else {
4477: push(@homeservers,&homeserver($caller,$codedom));
4478: }
4479: foreach my $code (keys(%{$instcodes})) {
4480: $courses .= &escape($code).'='.&escape($$instcodes{$code}).'&';
4481: }
4482: chop($courses);
4483: my $ok_response = 0;
4484: my $response;
4485: while (@homeservers > 0 && $ok_response == 0) {
4486: my $server = shift(@homeservers);
4487: $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$server);
4488: if ($response !~ /(con_lost|error|no_such_host|refused)/) {
4489: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) =
4490: split/:/,$response;
4491: %{$codes} = (%{$codes},&str2hash($codes_str));
4492: push(@{$codetitles},&str2array($codetitles_str));
4493: %{$cat_titles} = (%{$cat_titles},&str2hash($cat_titles_str));
4494: %{$cat_order} = (%{$cat_order},&str2hash($cat_order_str));
4495: $ok_response = 1;
4496: }
4497: }
4498: if ($ok_response) {
4499: return 'ok';
4500: } else {
4501: return $response;
4502: }
4503: }
4504:
4505: sub auto_instcode_defaults {
4506: my ($domain,$returnhash,$code_order) = @_;
4507: my @homeservers;
4508:
4509: my %servers = &get_servers($domain,'library');
4510: foreach my $tryserver (keys(%servers)) {
4511: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4512: push(@homeservers,$tryserver);
4513: }
4514: }
4515:
4516: my $response;
4517: foreach my $server (@homeservers) {
4518: $response=&reply('autoinstcodedefaults:'.$domain,$server);
4519: next if ($response =~ /(con_lost|error|no_such_host|refused)/);
4520:
4521: foreach my $pair (split(/\&/,$response)) {
4522: my ($name,$value)=split(/\=/,$pair);
4523: if ($name eq 'code_order') {
4524: @{$code_order} = split(/\&/,&unescape($value));
4525: } else {
4526: $returnhash->{&unescape($name)}=&unescape($value);
4527: }
4528: }
4529: return 'ok';
4530: }
4531:
4532: return $response;
4533: }
4534:
4535: sub auto_validate_class_sec {
4536: my ($cdom,$cnum,$owner,$inst_class) = @_;
4537: my $homeserver = &homeserver($cnum,$cdom);
4538: my $response=&reply('autovalidateclass_sec:'.$inst_class.':'.
4539: &escape($owner).':'.$cdom,$homeserver);
4540: return $response;
4541: }
4542:
4543: # ------------------------------------------------------- Course Group routines
4544:
4545: sub get_coursegroups {
4546: my ($cdom,$cnum,$group,$namespace) = @_;
4547: return(&dump($namespace,$cdom,$cnum,$group));
4548: }
4549:
4550: sub modify_coursegroup {
4551: my ($cdom,$cnum,$groupsettings) = @_;
4552: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
4553: }
4554:
4555: sub toggle_coursegroup_status {
4556: my ($cdom,$cnum,$group,$action) = @_;
4557: my ($from_namespace,$to_namespace);
4558: if ($action eq 'delete') {
4559: $from_namespace = 'coursegroups';
4560: $to_namespace = 'deleted_groups';
4561: } else {
4562: $from_namespace = 'deleted_groups';
4563: $to_namespace = 'coursegroups';
4564: }
4565: my %curr_group = &get_coursegroups($cdom,$cnum,$group,$from_namespace);
4566: if (my $tmp = &error(%curr_group)) {
4567: &Apache::lonnet::logthis('Error retrieving group: '.$tmp.' in '.$cnum.':'.$cdom);
4568: return ('read error',$tmp);
4569: } else {
4570: my %savedsettings = %curr_group;
4571: my $result = &put($to_namespace,\%savedsettings,$cdom,$cnum);
4572: my $deloutcome;
4573: if ($result eq 'ok') {
4574: $deloutcome = &del($from_namespace,[$group],$cdom,$cnum);
4575: } else {
4576: return ('write error',$result);
4577: }
4578: if ($deloutcome eq 'ok') {
4579: return 'ok';
4580: } else {
4581: return ('delete error',$deloutcome);
4582: }
4583: }
4584: }
4585:
4586: sub modify_group_roles {
4587: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
4588: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
4589: my $role = 'gr/'.&escape($userprivs);
4590: my ($uname,$udom) = split(/:/,$user);
4591: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
4592: if ($result eq 'ok') {
4593: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
4594: }
4595: return $result;
4596: }
4597:
4598: sub modify_coursegroup_membership {
4599: my ($cdom,$cnum,$membership) = @_;
4600: my $result = &put('groupmembership',$membership,$cdom,$cnum);
4601: return $result;
4602: }
4603:
4604: sub get_active_groups {
4605: my ($udom,$uname,$cdom,$cnum) = @_;
4606: my $now = time;
4607: my %groups = ();
4608: foreach my $key (keys(%env)) {
4609: if ($key =~ m-user\.role\.gr\./($match_domain)/($match_courseid)/(\w+)$-) {
4610: my ($start,$end) = split(/\./,$env{$key});
4611: if (($end!=0) && ($end<$now)) { next; }
4612: if (($start!=0) && ($start>$now)) { next; }
4613: if ($1 eq $cdom && $2 eq $cnum) {
4614: $groups{$3} = $env{$key} ;
4615: }
4616: }
4617: }
4618: return %groups;
4619: }
4620:
4621: sub get_group_membership {
4622: my ($cdom,$cnum,$group) = @_;
4623: return(&dump('groupmembership',$cdom,$cnum,$group));
4624: }
4625:
4626: sub get_users_groups {
4627: my ($udom,$uname,$courseid) = @_;
4628: my @usersgroups;
4629: my $cachetime=1800;
4630:
4631: my $hashid="$udom:$uname:$courseid";
4632: my ($grouplist,$cached)=&is_cached_new('getgroups',$hashid);
4633: if (defined($cached)) {
4634: @usersgroups = split(/:/,$grouplist);
4635: } else {
4636: $grouplist = '';
4637: my $courseurl = &courseid_to_courseurl($courseid);
4638: my %roleshash = &dump('roles',$udom,$uname,$courseurl);
4639: my $access_end = $env{'course.'.$courseid.
4640: '.default_enrollment_end_date'};
4641: my $now = time;
4642: foreach my $key (keys(%roleshash)) {
4643: if ($key =~ /^\Q$courseurl\E\/(\w+)\_gr$/) {
4644: my $group = $1;
4645: if ($roleshash{$key} =~ /_(\d+)_(\d+)$/) {
4646: my $start = $2;
4647: my $end = $1;
4648: if ($start == -1) { next; } # deleted from group
4649: if (($start!=0) && ($start>$now)) { next; }
4650: if (($end!=0) && ($end<$now)) {
4651: if ($access_end && $access_end < $now) {
4652: if ($access_end - $end < 86400) {
4653: push(@usersgroups,$group);
4654: }
4655: }
4656: next;
4657: }
4658: push(@usersgroups,$group);
4659: }
4660: }
4661: }
4662: @usersgroups = &sort_course_groups($courseid,@usersgroups);
4663: $grouplist = join(':',@usersgroups);
4664: &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
4665: }
4666: return @usersgroups;
4667: }
4668:
4669: sub devalidate_getgroups_cache {
4670: my ($udom,$uname,$cdom,$cnum)=@_;
4671: my $courseid = $cdom.'_'.$cnum;
4672:
4673: my $hashid="$udom:$uname:$courseid";
4674: &devalidate_cache_new('getgroups',$hashid);
4675: }
4676:
4677: # ------------------------------------------------------------------ Plain Text
4678:
4679: sub plaintext {
4680: my ($short,$type,$cid) = @_;
4681: if ($short =~ /^cr/) {
4682: return (split('/',$short))[-1];
4683: }
4684: if (!defined($cid)) {
4685: $cid = $env{'request.course.id'};
4686: }
4687: if (defined($cid) && defined($env{'course.'.$cid.'.'.$short.'.plaintext'})) {
4688: return &Apache::lonlocal::mt($env{'course.'.$cid.'.'.$short.
4689: '.plaintext'});
4690: }
4691: my %rolenames = (
4692: Course => 'std',
4693: Group => 'alt1',
4694: );
4695: if (defined($type) &&
4696: defined($rolenames{$type}) &&
4697: defined($prp{$short}{$rolenames{$type}})) {
4698: return &Apache::lonlocal::mt($prp{$short}{$rolenames{$type}});
4699: } else {
4700: return &Apache::lonlocal::mt($prp{$short}{'std'});
4701: }
4702: }
4703:
4704: # ----------------------------------------------------------------- Assign Role
4705:
4706: sub assignrole {
4707: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
4708: my $mrole;
4709: if ($role =~ /^cr\//) {
4710: my $cwosec=$url;
4711: $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
4712: unless (&allowed('ccr',$cwosec)) {
4713: &logthis('Refused custom assignrole: '.
4714: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4715: $env{'user.name'}.' at '.$env{'user.domain'});
4716: return 'refused';
4717: }
4718: $mrole='cr';
4719: } elsif ($role =~ /^gr\//) {
4720: my $cwogrp=$url;
4721: $cwogrp=~s{^/($match_domain)/($match_courseid)/.*}{$1/$2};
4722: unless (&allowed('mdg',$cwogrp)) {
4723: &logthis('Refused group assignrole: '.
4724: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4725: $env{'user.name'}.' at '.$env{'user.domain'});
4726: return 'refused';
4727: }
4728: $mrole='gr';
4729: } else {
4730: my $cwosec=$url;
4731: $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
4732: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
4733: &logthis('Refused assignrole: '.
4734: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4735: $env{'user.name'}.' at '.$env{'user.domain'});
4736: return 'refused';
4737: }
4738: $mrole=$role;
4739: }
4740: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4741: "$udom:$uname:$url".'_'."$mrole=$role";
4742: if ($end) { $command.='_'.$end; }
4743: if ($start) {
4744: if ($end) {
4745: $command.='_'.$start;
4746: } else {
4747: $command.='_0_'.$start;
4748: }
4749: }
4750: my $origstart = $start;
4751: my $origend = $end;
4752: # actually delete
4753: if ($deleteflag) {
4754: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
4755: # modify command to delete the role
4756: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
4757: "$udom:$uname:$url".'_'."$mrole";
4758: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
4759: # set start and finish to negative values for userrolelog
4760: $start=-1;
4761: $end=-1;
4762: }
4763: }
4764: # send command
4765: my $answer=&reply($command,&homeserver($uname,$udom));
4766: # log new user role if status is ok
4767: if ($answer eq 'ok') {
4768: &userrolelog($role,$uname,$udom,$url,$start,$end);
4769: # for course roles, perform group memberships changes triggered by role change.
4770: unless ($role =~ /^gr/) {
4771: &Apache::longroup::group_changes($udom,$uname,$url,$role,$origend,
4772: $origstart);
4773: }
4774: }
4775: return $answer;
4776: }
4777:
4778: # -------------------------------------------------- Modify user authentication
4779: # Overrides without validation
4780:
4781: sub modifyuserauth {
4782: my ($udom,$uname,$umode,$upass)=@_;
4783: my $uhome=&homeserver($uname,$udom);
4784: unless (&allowed('mau',$udom)) { return 'refused'; }
4785: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
4786: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4787: ' in domain '.$env{'request.role.domain'});
4788: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
4789: &escape($upass),$uhome);
4790: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
4791: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
4792: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4793: &log($udom,,$uname,$uhome,
4794: 'Authentication changed by '.$env{'user.domain'}.', '.
4795: $env{'user.name'}.', '.$umode.
4796: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4797: unless ($reply eq 'ok') {
4798: &logthis('Authentication mode error: '.$reply);
4799: return 'error: '.$reply;
4800: }
4801: return 'ok';
4802: }
4803:
4804: # --------------------------------------------------------------- Modify a user
4805:
4806: sub modifyuser {
4807: my ($udom, $uname, $uid,
4808: $umode, $upass, $first,
4809: $middle, $last, $gene,
4810: $forceid, $desiredhome, $email)=@_;
4811: $udom= &LONCAPA::clean_domain($udom);
4812: $uname=&LONCAPA::clean_username($uname);
4813: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
4814: $umode.', '.$first.', '.$middle.', '.
4815: $last.', '.$gene.'(forceid: '.$forceid.')'.
4816: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
4817: ' desiredhome not specified').
4818: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4819: ' in domain '.$env{'request.role.domain'});
4820: my $uhome=&homeserver($uname,$udom,'true');
4821: # ----------------------------------------------------------------- Create User
4822: if (($uhome eq 'no_host') &&
4823: (($umode && $upass) || ($umode eq 'localauth'))) {
4824: my $unhome='';
4825: if (defined($desiredhome) && &host_domain($desiredhome) eq $udom) {
4826: $unhome = $desiredhome;
4827: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
4828: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
4829: } else { # load balancing routine for determining $unhome
4830: my $loadm=10000000;
4831: my %servers = &get_servers($udom,'library');
4832: foreach my $tryserver (keys(%servers)) {
4833: my $answer=reply('load',$tryserver);
4834: if (($answer=~/\d+/) && ($answer<$loadm)) {
4835: $loadm=$answer;
4836: $unhome=$tryserver;
4837: }
4838: }
4839: }
4840: if (($unhome eq '') || ($unhome eq 'no_host')) {
4841: return 'error: unable to find a home server for '.$uname.
4842: ' in domain '.$udom;
4843: }
4844: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
4845: &escape($upass),$unhome);
4846: unless ($reply eq 'ok') {
4847: return 'error: '.$reply;
4848: }
4849: $uhome=&homeserver($uname,$udom,'true');
4850: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
4851: return 'error: unable verify users home machine.';
4852: }
4853: } # End of creation of new user
4854: # ---------------------------------------------------------------------- Add ID
4855: if ($uid) {
4856: $uid=~tr/A-Z/a-z/;
4857: my %uidhash=&idrget($udom,$uname);
4858: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
4859: && (!$forceid)) {
4860: unless ($uid eq $uidhash{$uname}) {
4861: return 'error: user id "'.$uid.'" does not match '.
4862: 'current user id "'.$uidhash{$uname}.'".';
4863: }
4864: } else {
4865: &idput($udom,($uname => $uid));
4866: }
4867: }
4868: # -------------------------------------------------------------- Add names, etc
4869: my @tmp=&get('environment',
4870: ['firstname','middlename','lastname','generation'],
4871: $udom,$uname);
4872: my %names;
4873: if ($tmp[0] =~ m/^error:.*/) {
4874: %names=();
4875: } else {
4876: %names = @tmp;
4877: }
4878: #
4879: # Make sure to not trash student environment if instructor does not bother
4880: # to supply name and email information
4881: #
4882: if ($first) { $names{'firstname'} = $first; }
4883: if (defined($middle)) { $names{'middlename'} = $middle; }
4884: if ($last) { $names{'lastname'} = $last; }
4885: if (defined($gene)) { $names{'generation'} = $gene; }
4886: if ($email) {
4887: $email=~s/[^\w\@\.\-\,]//gs;
4888: if ($email=~/\@/) { $names{'notification'} = $email;
4889: $names{'critnotification'} = $email;
4890: $names{'permanentemail'} = $email; }
4891: }
4892: my $reply = &put('environment', \%names, $udom,$uname);
4893: if ($reply ne 'ok') { return 'error: '.$reply; }
4894: &devalidate_cache_new('namescache',$uname.':'.$udom);
4895: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
4896: $umode.', '.$first.', '.$middle.', '.
4897: $last.', '.$gene.' by '.
4898: $env{'user.name'}.' at '.$env{'user.domain'});
4899: return 'ok';
4900: }
4901:
4902: # -------------------------------------------------------------- Modify student
4903:
4904: sub modifystudent {
4905: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
4906: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
4907: if (!$cid) {
4908: unless ($cid=$env{'request.course.id'}) {
4909: return 'not_in_class';
4910: }
4911: }
4912: # --------------------------------------------------------------- Make the user
4913: my $reply=&modifyuser
4914: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
4915: $desiredhome,$email);
4916: unless ($reply eq 'ok') { return $reply; }
4917: # This will cause &modify_student_enrollment to get the uid from the
4918: # students environment
4919: $uid = undef if (!$forceid);
4920: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
4921: $gene,$usec,$end,$start,$type,$locktype,$cid);
4922: return $reply;
4923: }
4924:
4925: sub modify_student_enrollment {
4926: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
4927: my ($cdom,$cnum,$chome);
4928: if (!$cid) {
4929: unless ($cid=$env{'request.course.id'}) {
4930: return 'not_in_class';
4931: }
4932: $cdom=$env{'course.'.$cid.'.domain'};
4933: $cnum=$env{'course.'.$cid.'.num'};
4934: } else {
4935: ($cdom,$cnum)=split(/_/,$cid);
4936: }
4937: $chome=$env{'course.'.$cid.'.home'};
4938: if (!$chome) {
4939: $chome=&homeserver($cnum,$cdom);
4940: }
4941: if (!$chome) { return 'unknown_course'; }
4942: # Make sure the user exists
4943: my $uhome=&homeserver($uname,$udom);
4944: if (($uhome eq '') || ($uhome eq 'no_host')) {
4945: return 'error: no such user';
4946: }
4947: # Get student data if we were not given enough information
4948: if (!defined($first) || $first eq '' ||
4949: !defined($last) || $last eq '' ||
4950: !defined($uid) || $uid eq '' ||
4951: !defined($middle) || $middle eq '' ||
4952: !defined($gene) || $gene eq '') {
4953: # They did not supply us with enough data to enroll the student, so
4954: # we need to pick up more information.
4955: my %tmp = &get('environment',
4956: ['firstname','middlename','lastname', 'generation','id']
4957: ,$udom,$uname);
4958:
4959: #foreach my $key (keys(%tmp)) {
4960: # &logthis("key $key = ".$tmp{$key});
4961: #}
4962: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
4963: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
4964: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
4965: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
4966: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
4967: }
4968: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
4969: my $reply=cput('classlist',
4970: {"$uname:$udom" =>
4971: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
4972: $cdom,$cnum);
4973: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
4974: return 'error: '.$reply;
4975: } else {
4976: &devalidate_getsection_cache($udom,$uname,$cid);
4977: }
4978: # Add student role to user
4979: my $uurl='/'.$cid;
4980: $uurl=~s/\_/\//g;
4981: if ($usec) {
4982: $uurl.='/'.$usec;
4983: }
4984: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
4985: }
4986:
4987: sub format_name {
4988: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
4989: my $name;
4990: if ($first ne 'lastname') {
4991: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
4992: } else {
4993: if ($lastname=~/\S/) {
4994: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
4995: $name=~s/\s+,/,/;
4996: } else {
4997: $name.= $firstname.' '.$middlename.' '.$generation;
4998: }
4999: }
5000: $name=~s/^\s+//;
5001: $name=~s/\s+$//;
5002: $name=~s/\s+/ /g;
5003: return $name;
5004: }
5005:
5006: # ------------------------------------------------- Write to course preferences
5007:
5008: sub writecoursepref {
5009: my ($courseid,%prefs)=@_;
5010: $courseid=~s/^\///;
5011: $courseid=~s/\_/\//g;
5012: my ($cdomain,$cnum)=split(/\//,$courseid);
5013: my $chome=homeserver($cnum,$cdomain);
5014: if (($chome eq '') || ($chome eq 'no_host')) {
5015: return 'error: no such course';
5016: }
5017: my $cstring='';
5018: foreach my $pref (keys(%prefs)) {
5019: $cstring.=&escape($pref).'='.&escape($prefs{$pref}).'&';
5020: }
5021: $cstring=~s/\&$//;
5022: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
5023: }
5024:
5025: # ---------------------------------------------------------- Make/modify course
5026:
5027: sub createcourse {
5028: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,
5029: $course_owner,$crstype)=@_;
5030: $url=&declutter($url);
5031: my $cid='';
5032: unless (&allowed('ccc',$udom)) {
5033: return 'refused';
5034: }
5035: # ------------------------------------------------------------------- Create ID
5036: my $uname=int(1+rand(9)).
5037: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
5038: substr($$.time,0,5).unpack("H8",pack("I32",time)).
5039: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
5040: # ----------------------------------------------- Make sure that does not exist
5041: my $uhome=&homeserver($uname,$udom,'true');
5042: unless (($uhome eq '') || ($uhome eq 'no_host')) {
5043: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
5044: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
5045: $uhome=&homeserver($uname,$udom,'true');
5046: unless (($uhome eq '') || ($uhome eq 'no_host')) {
5047: return 'error: unable to generate unique course-ID';
5048: }
5049: }
5050: # ------------------------------------------------ Check supplied server name
5051: $course_server = $env{'user.homeserver'} if (! defined($course_server));
5052: if (! &is_library($course_server)) {
5053: return 'error:bad server name '.$course_server;
5054: }
5055: # ------------------------------------------------------------- Make the course
5056: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
5057: $course_server);
5058: unless ($reply eq 'ok') { return 'error: '.$reply; }
5059: $uhome=&homeserver($uname,$udom,'true');
5060: if (($uhome eq '') || ($uhome eq 'no_host')) {
5061: return 'error: no such course';
5062: }
5063: # ----------------------------------------------------------------- Course made
5064: # log existence
5065: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
5066: ':'.&escape($inst_code).':'.&escape($course_owner).':'.
5067: &escape($crstype),$uhome);
5068: &flushcourselogs();
5069: # set toplevel url
5070: my $topurl=$url;
5071: unless ($nonstandard) {
5072: # ------------------------------------------ For standard courses, make top url
5073: my $mapurl=&clutter($url);
5074: if ($mapurl eq '/res/') { $mapurl=''; }
5075: $env{'form.initmap'}=(<<ENDINITMAP);
5076: <map>
5077: <resource id="1" type="start"></resource>
5078: <resource id="2" src="$mapurl"></resource>
5079: <resource id="3" type="finish"></resource>
5080: <link index="1" from="1" to="2"></link>
5081: <link index="2" from="2" to="3"></link>
5082: </map>
5083: ENDINITMAP
5084: $topurl=&declutter(
5085: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
5086: );
5087: }
5088: # ----------------------------------------------------------- Write preferences
5089: &writecoursepref($udom.'_'.$uname,
5090: ('description' => $description,
5091: 'url' => $topurl));
5092: return '/'.$udom.'/'.$uname;
5093: }
5094:
5095: sub is_course {
5096: my ($cdom,$cnum) = @_;
5097: my %courses = &courseiddump($cdom,'.',1,'.','.',$cnum,undef,
5098: undef,'.');
5099: if (exists($courses{$cdom.'_'.$cnum})) {
5100: return 1;
5101: }
5102: return 0;
5103: }
5104:
5105: # ---------------------------------------------------------- Assign Custom Role
5106:
5107: sub assigncustomrole {
5108: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
5109: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
5110: $end,$start,$deleteflag);
5111: }
5112:
5113: # ----------------------------------------------------------------- Revoke Role
5114:
5115: sub revokerole {
5116: my ($udom,$uname,$url,$role,$deleteflag)=@_;
5117: my $now=time;
5118: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
5119: }
5120:
5121: # ---------------------------------------------------------- Revoke Custom Role
5122:
5123: sub revokecustomrole {
5124: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
5125: my $now=time;
5126: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
5127: $deleteflag);
5128: }
5129:
5130: # ------------------------------------------------------------ Disk usage
5131: sub diskusage {
5132: my ($udom,$uname,$directoryRoot)=@_;
5133: $directoryRoot =~ s/\/$//;
5134: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
5135: return $listing;
5136: }
5137:
5138: sub is_locked {
5139: my ($file_name, $domain, $user) = @_;
5140: my @check;
5141: my $is_locked;
5142: push @check, $file_name;
5143: my %locked = &get('file_permissions',\@check,
5144: $env{'user.domain'},$env{'user.name'});
5145: my ($tmp)=keys(%locked);
5146: if ($tmp=~/^error:/) { undef(%locked); }
5147:
5148: if (ref($locked{$file_name}) eq 'ARRAY') {
5149: $is_locked = 'false';
5150: foreach my $entry (@{$locked{$file_name}}) {
5151: if (ref($entry) eq 'ARRAY') {
5152: $is_locked = 'true';
5153: last;
5154: }
5155: }
5156: } else {
5157: $is_locked = 'false';
5158: }
5159: }
5160:
5161: sub declutter_portfile {
5162: my ($file) = @_;
5163: $file =~ s{^(/portfolio/|portfolio/)}{/};
5164: return $file;
5165: }
5166:
5167: # ------------------------------------------------------------- Mark as Read Only
5168:
5169: sub mark_as_readonly {
5170: my ($domain,$user,$files,$what) = @_;
5171: my %current_permissions = &dump('file_permissions',$domain,$user);
5172: my ($tmp)=keys(%current_permissions);
5173: if ($tmp=~/^error:/) { undef(%current_permissions); }
5174: foreach my $file (@{$files}) {
5175: $file = &declutter_portfile($file);
5176: push(@{$current_permissions{$file}},$what);
5177: }
5178: &put('file_permissions',\%current_permissions,$domain,$user);
5179: return;
5180: }
5181:
5182: # ------------------------------------------------------------Save Selected Files
5183:
5184: sub save_selected_files {
5185: my ($user, $path, @files) = @_;
5186: my $filename = $user."savedfiles";
5187: my @other_files = &files_not_in_path($user, $path);
5188: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5189: foreach my $file (@files) {
5190: print (OUT $env{'form.currentpath'}.$file."\n");
5191: }
5192: foreach my $file (@other_files) {
5193: print (OUT $file."\n");
5194: }
5195: close (OUT);
5196: return 'ok';
5197: }
5198:
5199: sub clear_selected_files {
5200: my ($user) = @_;
5201: my $filename = $user."savedfiles";
5202: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5203: print (OUT undef);
5204: close (OUT);
5205: return ("ok");
5206: }
5207:
5208: sub files_in_path {
5209: my ($user, $path) = @_;
5210: my $filename = $user."savedfiles";
5211: my %return_files;
5212: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5213: while (my $line_in = <IN>) {
5214: chomp ($line_in);
5215: my @paths_and_file = split (m!/!, $line_in);
5216: my $file_part = pop (@paths_and_file);
5217: my $path_part = join ('/', @paths_and_file);
5218: $path_part.='/';
5219: my $path_and_file = $path_part.$file_part;
5220: if ($path_part eq $path) {
5221: $return_files{$file_part}= 'selected';
5222: }
5223: }
5224: close (IN);
5225: return (\%return_files);
5226: }
5227:
5228: # called in portfolio select mode, to show files selected NOT in current directory
5229: sub files_not_in_path {
5230: my ($user, $path) = @_;
5231: my $filename = $user."savedfiles";
5232: my @return_files;
5233: my $path_part;
5234: open(IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5235: while (my $line = <IN>) {
5236: #ok, I know it's clunky, but I want it to work
5237: my @paths_and_file = split(m|/|, $line);
5238: my $file_part = pop(@paths_and_file);
5239: chomp($file_part);
5240: my $path_part = join('/', @paths_and_file);
5241: $path_part .= '/';
5242: my $path_and_file = $path_part.$file_part;
5243: if ($path_part ne $path) {
5244: push(@return_files, ($path_and_file));
5245: }
5246: }
5247: close(OUT);
5248: return (@return_files);
5249: }
5250:
5251: #----------------------------------------------Get portfolio file permissions
5252:
5253: sub get_portfile_permissions {
5254: my ($domain,$user) = @_;
5255: my %current_permissions = &dump('file_permissions',$domain,$user);
5256: my ($tmp)=keys(%current_permissions);
5257: if ($tmp=~/^error:/) { undef(%current_permissions); }
5258: return \%current_permissions;
5259: }
5260:
5261: #---------------------------------------------Get portfolio file access controls
5262:
5263: sub get_access_controls {
5264: my ($current_permissions,$group,$file) = @_;
5265: my %access;
5266: my $real_file = $file;
5267: $file =~ s/\.meta$//;
5268: if (defined($file)) {
5269: if (ref($$current_permissions{$file."\0".'accesscontrol'}) eq 'HASH') {
5270: foreach my $control (keys(%{$$current_permissions{$file."\0".'accesscontrol'}})) {
5271: $access{$real_file}{$control} = $$current_permissions{$file."\0".$control};
5272: }
5273: }
5274: } else {
5275: foreach my $key (keys(%{$current_permissions})) {
5276: if ($key =~ /\0accesscontrol$/) {
5277: if (defined($group)) {
5278: if ($key !~ m-^\Q$group\E/-) {
5279: next;
5280: }
5281: }
5282: my ($fullpath) = split(/\0/,$key);
5283: if (ref($$current_permissions{$key}) eq 'HASH') {
5284: foreach my $control (keys(%{$$current_permissions{$key}})) {
5285: $access{$fullpath}{$control}=$$current_permissions{$fullpath."\0".$control};
5286: }
5287: }
5288: }
5289: }
5290: }
5291: return %access;
5292: }
5293:
5294: sub modify_access_controls {
5295: my ($file_name,$changes,$domain,$user)=@_;
5296: my ($outcome,$deloutcome);
5297: my %store_permissions;
5298: my %new_values;
5299: my %new_control;
5300: my %translation;
5301: my @deletions = ();
5302: my $now = time;
5303: if (exists($$changes{'activate'})) {
5304: if (ref($$changes{'activate'}) eq 'HASH') {
5305: my @newitems = sort(keys(%{$$changes{'activate'}}));
5306: my $numnew = scalar(@newitems);
5307: for (my $i=0; $i<$numnew; $i++) {
5308: my $newkey = $newitems[$i];
5309: my $newid = &Apache::loncommon::get_cgi_id();
5310: if ($newkey =~ /^\d+:/) {
5311: $newkey =~ s/^(\d+)/$newid/;
5312: $translation{$1} = $newid;
5313: } elsif ($newkey =~ /^\d+_\d+_\d+:/) {
5314: $newkey =~ s/^(\d+_\d+_\d+)/$newid/;
5315: $translation{$1} = $newid;
5316: }
5317: $new_values{$file_name."\0".$newkey} =
5318: $$changes{'activate'}{$newitems[$i]};
5319: $new_control{$newkey} = $now;
5320: }
5321: }
5322: }
5323: my %todelete;
5324: my %changed_items;
5325: foreach my $action ('delete','update') {
5326: if (exists($$changes{$action})) {
5327: if (ref($$changes{$action}) eq 'HASH') {
5328: foreach my $key (keys(%{$$changes{$action}})) {
5329: my ($itemnum) = ($key =~ /^([^:]+):/);
5330: if ($action eq 'delete') {
5331: $todelete{$itemnum} = 1;
5332: } else {
5333: $changed_items{$itemnum} = $key;
5334: }
5335: }
5336: }
5337: }
5338: }
5339: # get lock on access controls for file.
5340: my $lockhash = {
5341: $file_name."\0".'locked_access_records' => $env{'user.name'}.
5342: ':'.$env{'user.domain'},
5343: };
5344: my $tries = 0;
5345: my $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5346:
5347: while (($gotlock ne 'ok') && $tries <3) {
5348: $tries ++;
5349: sleep 1;
5350: $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5351: }
5352: if ($gotlock eq 'ok') {
5353: my %curr_permissions = &dump('file_permissions',$domain,$user,$file_name);
5354: my ($tmp)=keys(%curr_permissions);
5355: if ($tmp=~/^error:/) { undef(%curr_permissions); }
5356: if (exists($curr_permissions{$file_name."\0".'accesscontrol'})) {
5357: my $curr_controls = $curr_permissions{$file_name."\0".'accesscontrol'};
5358: if (ref($curr_controls) eq 'HASH') {
5359: foreach my $control_item (keys(%{$curr_controls})) {
5360: my ($itemnum) = ($control_item =~ /^([^:]+):/);
5361: if (defined($todelete{$itemnum})) {
5362: push(@deletions,$file_name."\0".$control_item);
5363: } else {
5364: if (defined($changed_items{$itemnum})) {
5365: $new_control{$changed_items{$itemnum}} = $now;
5366: push(@deletions,$file_name."\0".$control_item);
5367: $new_values{$file_name."\0".$changed_items{$itemnum}} = $$changes{'update'}{$changed_items{$itemnum}};
5368: } else {
5369: $new_control{$control_item} = $$curr_controls{$control_item};
5370: }
5371: }
5372: }
5373: }
5374: }
5375: $deloutcome = &del('file_permissions',\@deletions,$domain,$user);
5376: $new_values{$file_name."\0".'accesscontrol'} = \%new_control;
5377: $outcome = &put('file_permissions',\%new_values,$domain,$user);
5378: # remove lock
5379: my @del_lock = ($file_name."\0".'locked_access_records');
5380: my $dellockoutcome = &del('file_permissions',\@del_lock,$domain,$user);
5381: my ($file,$group);
5382: if (&is_course($domain,$user)) {
5383: ($group,$file) = split(/\//,$file_name,2);
5384: } else {
5385: $file = $file_name;
5386: }
5387: my $sqlresult =
5388: &update_portfolio_table($user,$domain,$file,'portfolio_access',
5389: $group);
5390: } else {
5391: $outcome = "error: could not obtain lockfile\n";
5392: }
5393: return ($outcome,$deloutcome,\%new_values,\%translation);
5394: }
5395:
5396: sub make_public_indefinitely {
5397: my ($requrl) = @_;
5398: my $now = time;
5399: my $action = 'activate';
5400: my $aclnum = 0;
5401: if (&is_portfolio_url($requrl)) {
5402: my (undef,$udom,$unum,$file_name,$group) =
5403: &parse_portfolio_url($requrl);
5404: my $current_perms = &get_portfile_permissions($udom,$unum);
5405: my %access_controls = &get_access_controls($current_perms,
5406: $group,$file_name);
5407: foreach my $key (keys(%{$access_controls{$file_name}})) {
5408: my ($num,$scope,$end,$start) =
5409: ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
5410: if ($scope eq 'public') {
5411: if ($start <= $now && $end == 0) {
5412: $action = 'none';
5413: } else {
5414: $action = 'update';
5415: $aclnum = $num;
5416: }
5417: last;
5418: }
5419: }
5420: if ($action eq 'none') {
5421: return 'ok';
5422: } else {
5423: my %changes;
5424: my $newend = 0;
5425: my $newstart = $now;
5426: my $newkey = $aclnum.':public_'.$newend.'_'.$newstart;
5427: $changes{$action}{$newkey} = {
5428: type => 'public',
5429: time => {
5430: start => $newstart,
5431: end => $newend,
5432: },
5433: };
5434: my ($outcome,$deloutcome,$new_values,$translation) =
5435: &modify_access_controls($file_name,\%changes,$udom,$unum);
5436: return $outcome;
5437: }
5438: } else {
5439: return 'invalid';
5440: }
5441: }
5442:
5443: #------------------------------------------------------Get Marked as Read Only
5444:
5445: sub get_marked_as_readonly {
5446: my ($domain,$user,$what,$group) = @_;
5447: my $current_permissions = &get_portfile_permissions($domain,$user);
5448: my @readonly_files;
5449: my $cmp1=$what;
5450: if (ref($what)) { $cmp1=join('',@{$what}) };
5451: while (my ($file_name,$value) = each(%{$current_permissions})) {
5452: if (defined($group)) {
5453: if ($file_name !~ m-^\Q$group\E/-) {
5454: next;
5455: }
5456: }
5457: if (ref($value) eq "ARRAY"){
5458: foreach my $stored_what (@{$value}) {
5459: my $cmp2=$stored_what;
5460: if (ref($stored_what) eq 'ARRAY') {
5461: $cmp2=join('',@{$stored_what});
5462: }
5463: if ($cmp1 eq $cmp2) {
5464: push(@readonly_files, $file_name);
5465: last;
5466: } elsif (!defined($what)) {
5467: push(@readonly_files, $file_name);
5468: last;
5469: }
5470: }
5471: }
5472: }
5473: return @readonly_files;
5474: }
5475: #-----------------------------------------------------------Get Marked as Read Only Hash
5476:
5477: sub get_marked_as_readonly_hash {
5478: my ($current_permissions,$group,$what) = @_;
5479: my %readonly_files;
5480: while (my ($file_name,$value) = each(%{$current_permissions})) {
5481: if (defined($group)) {
5482: if ($file_name !~ m-^\Q$group\E/-) {
5483: next;
5484: }
5485: }
5486: if (ref($value) eq "ARRAY"){
5487: foreach my $stored_what (@{$value}) {
5488: if (ref($stored_what) eq 'ARRAY') {
5489: foreach my $lock_descriptor(@{$stored_what}) {
5490: if ($lock_descriptor eq 'graded') {
5491: $readonly_files{$file_name} = 'graded';
5492: } elsif ($lock_descriptor eq 'handback') {
5493: $readonly_files{$file_name} = 'handback';
5494: } else {
5495: if (!exists($readonly_files{$file_name})) {
5496: $readonly_files{$file_name} = 'locked';
5497: }
5498: }
5499: }
5500: }
5501: }
5502: }
5503: }
5504: return %readonly_files;
5505: }
5506: # ------------------------------------------------------------ Unmark as Read Only
5507:
5508: sub unmark_as_readonly {
5509: # unmarks $file_name (if $file_name is defined), or all files locked by $what
5510: # for portfolio submissions, $what contains [$symb,$crsid]
5511: my ($domain,$user,$what,$file_name,$group) = @_;
5512: $file_name = &declutter_portfile($file_name);
5513: my $symb_crs = $what;
5514: if (ref($what)) { $symb_crs=join('',@$what); }
5515: my %current_permissions = &dump('file_permissions',$domain,$user,$group);
5516: my ($tmp)=keys(%current_permissions);
5517: if ($tmp=~/^error:/) { undef(%current_permissions); }
5518: my @readonly_files = &get_marked_as_readonly($domain,$user,$what,$group);
5519: foreach my $file (@readonly_files) {
5520: my $clean_file = &declutter_portfile($file);
5521: if (defined($file_name) && ($file_name ne $clean_file)) { next; }
5522: my $current_locks = $current_permissions{$file};
5523: my @new_locks;
5524: my @del_keys;
5525: if (ref($current_locks) eq "ARRAY"){
5526: foreach my $locker (@{$current_locks}) {
5527: my $compare=$locker;
5528: if (ref($locker) eq 'ARRAY') {
5529: $compare=join('',@{$locker});
5530: if ($compare ne $symb_crs) {
5531: push(@new_locks, $locker);
5532: }
5533: }
5534: }
5535: if (scalar(@new_locks) > 0) {
5536: $current_permissions{$file} = \@new_locks;
5537: } else {
5538: push(@del_keys, $file);
5539: &del('file_permissions',\@del_keys, $domain, $user);
5540: delete($current_permissions{$file});
5541: }
5542: }
5543: }
5544: &put('file_permissions',\%current_permissions,$domain,$user);
5545: return;
5546: }
5547:
5548: # ------------------------------------------------------------ Directory lister
5549:
5550: sub dirlist {
5551: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
5552:
5553: $uri=~s/^\///;
5554: $uri=~s/\/$//;
5555: my ($udom, $uname);
5556: (undef,$udom,$uname)=split(/\//,$uri);
5557: if(defined($userdomain)) {
5558: $udom = $userdomain;
5559: }
5560: if(defined($username)) {
5561: $uname = $username;
5562: }
5563:
5564: my $dirRoot = $perlvar{'lonDocRoot'};
5565: if(defined($alternateDirectoryRoot)) {
5566: $dirRoot = $alternateDirectoryRoot;
5567: $dirRoot =~ s/\/$//;
5568: }
5569:
5570: if($udom) {
5571: if($uname) {
5572: my $listing = &reply('ls2:'.$dirRoot.'/'.$uri,
5573: &homeserver($uname,$udom));
5574: my @listing_results;
5575: if ($listing eq 'unknown_cmd') {
5576: $listing = &reply('ls:'.$dirRoot.'/'.$uri,
5577: &homeserver($uname,$udom));
5578: @listing_results = split(/:/,$listing);
5579: } else {
5580: @listing_results = map { &unescape($_); } split(/:/,$listing);
5581: }
5582: return @listing_results;
5583: } elsif(!defined($alternateDirectoryRoot)) {
5584: my %allusers;
5585: my %servers = &get_servers($udom,'library');
5586: foreach my $tryserver (keys(%servers)) {
5587: my $listing = &reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
5588: $udom, $tryserver);
5589: my @listing_results;
5590: if ($listing eq 'unknown_cmd') {
5591: $listing = &reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
5592: $udom, $tryserver);
5593: @listing_results = split(/:/,$listing);
5594: } else {
5595: @listing_results =
5596: map { &unescape($_); } split(/:/,$listing);
5597: }
5598: if ($listing_results[0] ne 'no_such_dir' &&
5599: $listing_results[0] ne 'empty' &&
5600: $listing_results[0] ne 'con_lost') {
5601: foreach my $line (@listing_results) {
5602: my ($entry) = split(/&/,$line,2);
5603: $allusers{$entry} = 1;
5604: }
5605: }
5606: }
5607: my $alluserstr='';
5608: foreach my $user (sort(keys(%allusers))) {
5609: $alluserstr.=$user.'&user:';
5610: }
5611: $alluserstr=~s/:$//;
5612: return split(/:/,$alluserstr);
5613: } else {
5614: return ('missing user name');
5615: }
5616: } elsif(!defined($alternateDirectoryRoot)) {
5617: my @all_domains = sort(&all_domains());
5618: foreach my $domain (@all_domains) {
5619: $domain = $perlvar{'lonDocRoot'}.'/res/'.$domain.'/&domain';
5620: }
5621: return @all_domains;
5622: } else {
5623: return ('missing domain');
5624: }
5625: }
5626:
5627: # --------------------------------------------- GetFileTimestamp
5628: # This function utilizes dirlist and returns the date stamp for
5629: # when it was last modified. It will also return an error of -1
5630: # if an error occurs
5631:
5632: ##
5633: ## FIXME: This subroutine assumes its caller knows something about the
5634: ## directory structure of the home server for the student ($root).
5635: ## Not a good assumption to make. Since this is for looking up files
5636: ## in user directories, the full path should be constructed by lond, not
5637: ## whatever machine we request data from.
5638: ##
5639: sub GetFileTimestamp {
5640: my ($studentDomain,$studentName,$filename,$root)=@_;
5641: $studentDomain = &LONCAPA::clean_domain($studentDomain);
5642: $studentName = &LONCAPA::clean_username($studentName);
5643: my $subdir=$studentName.'__';
5644: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
5645: my $proname="$studentDomain/$subdir/$studentName";
5646: $proname .= '/'.$filename;
5647: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
5648: $studentName, $root);
5649: my @stats = split('&', $fileStat);
5650: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5651: # @stats contains first the filename, then the stat output
5652: return $stats[10]; # so this is 10 instead of 9.
5653: } else {
5654: return -1;
5655: }
5656: }
5657:
5658: sub stat_file {
5659: my ($uri) = @_;
5660: $uri = &clutter_with_no_wrapper($uri);
5661:
5662: my ($udom,$uname,$file,$dir);
5663: if ($uri =~ m-^/(uploaded|editupload)/-) {
5664: ($udom,$uname,$file) =
5665: ($uri =~ m-/(?:uploaded|editupload)/?($match_domain)/?($match_name)/?(.*)-);
5666: $file = 'userfiles/'.$file;
5667: $dir = &propath($udom,$uname);
5668: }
5669: if ($uri =~ m-^/res/-) {
5670: ($udom,$uname) =
5671: ($uri =~ m-/(?:res)/?($match_domain)/?($match_username)/-);
5672: $file = $uri;
5673: }
5674:
5675: if (!$udom || !$uname || !$file) {
5676: # unable to handle the uri
5677: return ();
5678: }
5679:
5680: my ($result) = &dirlist($file,$udom,$uname,$dir);
5681: my @stats = split('&', $result);
5682:
5683: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5684: shift(@stats); #filename is first
5685: return @stats;
5686: }
5687: return ();
5688: }
5689:
5690: # -------------------------------------------------------- Value of a Condition
5691:
5692: # gets the value of a specific preevaluated condition
5693: # stored in the string $env{user.state.<cid>}
5694: # or looks up a condition reference in the bighash and if if hasn't
5695: # already been evaluated recurses into docondval to get the value of
5696: # the condition, then memoizing it to
5697: # $env{user.state.<cid>.<condition>}
5698: sub directcondval {
5699: my $number=shift;
5700: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
5701: &Apache::lonuserstate::evalstate();
5702: }
5703: if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
5704: return $env{'user.state.'.$env{'request.course.id'}.".$number"};
5705: } elsif ($number =~ /^_/) {
5706: my $sub_condition;
5707: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5708: &GDBM_READER(),0640)) {
5709: $sub_condition=$bighash{'conditions'.$number};
5710: untie(%bighash);
5711: }
5712: my $value = &docondval($sub_condition);
5713: &appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
5714: return $value;
5715: }
5716: if ($env{'user.state.'.$env{'request.course.id'}}) {
5717: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
5718: } else {
5719: return 2;
5720: }
5721: }
5722:
5723: # get the collection of conditions for this resource
5724: sub condval {
5725: my $condidx=shift;
5726: my $allpathcond='';
5727: foreach my $cond (split(/\|/,$condidx)) {
5728: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
5729: $allpathcond.=
5730: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
5731: }
5732: }
5733: $allpathcond=~s/\|$//;
5734: return &docondval($allpathcond);
5735: }
5736:
5737: #evaluates an expression of conditions
5738: sub docondval {
5739: my ($allpathcond) = @_;
5740: my $result=0;
5741: if ($env{'request.course.id'}
5742: && defined($allpathcond)) {
5743: my $operand='|';
5744: my @stack;
5745: foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
5746: if ($chunk eq '(') {
5747: push @stack,($operand,$result);
5748: } elsif ($chunk eq ')') {
5749: my $before=pop @stack;
5750: if (pop @stack eq '&') {
5751: $result=$result>$before?$before:$result;
5752: } else {
5753: $result=$result>$before?$result:$before;
5754: }
5755: } elsif (($chunk eq '&') || ($chunk eq '|')) {
5756: $operand=$chunk;
5757: } else {
5758: my $new=directcondval($chunk);
5759: if ($operand eq '&') {
5760: $result=$result>$new?$new:$result;
5761: } else {
5762: $result=$result>$new?$result:$new;
5763: }
5764: }
5765: }
5766: }
5767: return $result;
5768: }
5769:
5770: # ---------------------------------------------------- Devalidate courseresdata
5771:
5772: sub devalidatecourseresdata {
5773: my ($coursenum,$coursedomain)=@_;
5774: my $hashid=$coursenum.':'.$coursedomain;
5775: &devalidate_cache_new('courseres',$hashid);
5776: }
5777:
5778:
5779: # --------------------------------------------------- Course Resourcedata Query
5780:
5781: sub get_courseresdata {
5782: my ($coursenum,$coursedomain)=@_;
5783: my $coursehom=&homeserver($coursenum,$coursedomain);
5784: my $hashid=$coursenum.':'.$coursedomain;
5785: my ($result,$cached)=&is_cached_new('courseres',$hashid);
5786: my %dumpreply;
5787: unless (defined($cached)) {
5788: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
5789: $result=\%dumpreply;
5790: my ($tmp) = keys(%dumpreply);
5791: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
5792: &do_cache_new('courseres',$hashid,$result,600);
5793: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
5794: return $tmp;
5795: } elsif ($tmp =~ /^(error)/) {
5796: $result=undef;
5797: &do_cache_new('courseres',$hashid,$result,600);
5798: }
5799: }
5800: return $result;
5801: }
5802:
5803: sub devalidateuserresdata {
5804: my ($uname,$udom)=@_;
5805: my $hashid="$udom:$uname";
5806: &devalidate_cache_new('userres',$hashid);
5807: }
5808:
5809: sub get_userresdata {
5810: my ($uname,$udom)=@_;
5811: #most student don\'t have any data set, check if there is some data
5812: if (&EXT_cache_status($udom,$uname)) { return undef; }
5813:
5814: my $hashid="$udom:$uname";
5815: my ($result,$cached)=&is_cached_new('userres',$hashid);
5816: if (!defined($cached)) {
5817: my %resourcedata=&dump('resourcedata',$udom,$uname);
5818: $result=\%resourcedata;
5819: &do_cache_new('userres',$hashid,$result,600);
5820: }
5821: my ($tmp)=keys(%$result);
5822: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
5823: return $result;
5824: }
5825: #error 2 occurs when the .db doesn't exist
5826: if ($tmp!~/error: 2 /) {
5827: &logthis("<font color=\"blue\">WARNING:".
5828: " Trying to get resource data for ".
5829: $uname." at ".$udom.": ".
5830: $tmp."</font>");
5831: } elsif ($tmp=~/error: 2 /) {
5832: #&EXT_cache_set($udom,$uname);
5833: &do_cache_new('userres',$hashid,undef,600);
5834: undef($tmp); # not really an error so don't send it back
5835: }
5836: return $tmp;
5837: }
5838:
5839: sub resdata {
5840: my ($name,$domain,$type,@which)=@_;
5841: my $result;
5842: if ($type eq 'course') {
5843: $result=&get_courseresdata($name,$domain);
5844: } elsif ($type eq 'user') {
5845: $result=&get_userresdata($name,$domain);
5846: }
5847: if (!ref($result)) { return $result; }
5848: foreach my $item (@which) {
5849: if (defined($result->{$item})) {
5850: return $result->{$item};
5851: }
5852: }
5853: return undef;
5854: }
5855:
5856: #
5857: # EXT resource caching routines
5858: #
5859:
5860: sub clear_EXT_cache_status {
5861: &delenv('cache.EXT.');
5862: }
5863:
5864: sub EXT_cache_status {
5865: my ($target_domain,$target_user) = @_;
5866: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5867: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
5868: # We know already the user has no data
5869: return 1;
5870: } else {
5871: return 0;
5872: }
5873: }
5874:
5875: sub EXT_cache_set {
5876: my ($target_domain,$target_user) = @_;
5877: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5878: #&appenv($cachename => time);
5879: }
5880:
5881: # --------------------------------------------------------- Value of a Variable
5882: sub EXT {
5883:
5884: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
5885: unless ($varname) { return ''; }
5886: #get real user name/domain, courseid and symb
5887: my $courseid;
5888: my $publicuser;
5889: if ($symbparm) {
5890: $symbparm=&get_symb_from_alias($symbparm);
5891: }
5892: if (!($uname && $udom)) {
5893: (my $cursymb,$courseid,$udom,$uname,$publicuser)= &whichuser($symbparm);
5894: if (!$symbparm) { $symbparm=$cursymb; }
5895: } else {
5896: $courseid=$env{'request.course.id'};
5897: }
5898: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
5899: my $rest;
5900: if (defined($therest[0])) {
5901: $rest=join('.',@therest);
5902: } else {
5903: $rest='';
5904: }
5905:
5906: my $qualifierrest=$qualifier;
5907: if ($rest) { $qualifierrest.='.'.$rest; }
5908: my $spacequalifierrest=$space;
5909: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
5910: if ($realm eq 'user') {
5911: # --------------------------------------------------------------- user.resource
5912: if ($space eq 'resource') {
5913: if ( (defined($Apache::lonhomework::parsing_a_problem)
5914: || defined($Apache::lonhomework::parsing_a_task))
5915: &&
5916: ($symbparm eq &symbread()) ) {
5917: # if we are in the middle of processing the resource the
5918: # get the value we are planning on committing
5919: if (defined($Apache::lonhomework::results{$qualifierrest})) {
5920: return $Apache::lonhomework::results{$qualifierrest};
5921: } else {
5922: return $Apache::lonhomework::history{$qualifierrest};
5923: }
5924: } else {
5925: my %restored;
5926: if ($publicuser || $env{'request.state'} eq 'construct') {
5927: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
5928: } else {
5929: %restored=&restore($symbparm,$courseid,$udom,$uname);
5930: }
5931: return $restored{$qualifierrest};
5932: }
5933: # ----------------------------------------------------------------- user.access
5934: } elsif ($space eq 'access') {
5935: # FIXME - not supporting calls for a specific user
5936: return &allowed($qualifier,$rest);
5937: # ------------------------------------------ user.preferences, user.environment
5938: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
5939: if (($uname eq $env{'user.name'}) &&
5940: ($udom eq $env{'user.domain'})) {
5941: return $env{join('.',('environment',$qualifierrest))};
5942: } else {
5943: my %returnhash;
5944: if (!$publicuser) {
5945: %returnhash=&userenvironment($udom,$uname,
5946: $qualifierrest);
5947: }
5948: return $returnhash{$qualifierrest};
5949: }
5950: # ----------------------------------------------------------------- user.course
5951: } elsif ($space eq 'course') {
5952: # FIXME - not supporting calls for a specific user
5953: return $env{join('.',('request.course',$qualifier))};
5954: # ------------------------------------------------------------------- user.role
5955: } elsif ($space eq 'role') {
5956: # FIXME - not supporting calls for a specific user
5957: my ($role,$where)=split(/\./,$env{'request.role'});
5958: if ($qualifier eq 'value') {
5959: return $role;
5960: } elsif ($qualifier eq 'extent') {
5961: return $where;
5962: }
5963: # ----------------------------------------------------------------- user.domain
5964: } elsif ($space eq 'domain') {
5965: return $udom;
5966: # ------------------------------------------------------------------- user.name
5967: } elsif ($space eq 'name') {
5968: return $uname;
5969: # ---------------------------------------------------- Any other user namespace
5970: } else {
5971: my %reply;
5972: if (!$publicuser) {
5973: %reply=&get($space,[$qualifierrest],$udom,$uname);
5974: }
5975: return $reply{$qualifierrest};
5976: }
5977: } elsif ($realm eq 'query') {
5978: # ---------------------------------------------- pull stuff out of query string
5979: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
5980: [$spacequalifierrest]);
5981: return $env{'form.'.$spacequalifierrest};
5982: } elsif ($realm eq 'request') {
5983: # ------------------------------------------------------------- request.browser
5984: if ($space eq 'browser') {
5985: if ($qualifier eq 'textremote') {
5986: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
5987: return 1;
5988: } else {
5989: return 0;
5990: }
5991: } else {
5992: return $env{'browser.'.$qualifier};
5993: }
5994: # ------------------------------------------------------------ request.filename
5995: } else {
5996: return $env{'request.'.$spacequalifierrest};
5997: }
5998: } elsif ($realm eq 'course') {
5999: # ---------------------------------------------------------- course.description
6000: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
6001: } elsif ($realm eq 'resource') {
6002:
6003: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
6004: if (!$symbparm) { $symbparm=&symbread(); }
6005: }
6006:
6007: if ($space eq 'title') {
6008: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
6009: return &gettitle($symbparm);
6010: }
6011:
6012: if ($space eq 'map') {
6013: my ($map) = &decode_symb($symbparm);
6014: return &symbread($map);
6015: }
6016:
6017: my ($section, $group, @groups);
6018: my ($courselevelm,$courselevel);
6019: if ($symbparm && defined($courseid) &&
6020: $courseid eq $env{'request.course.id'}) {
6021:
6022: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
6023:
6024: # ----------------------------------------------------- Cascading lookup scheme
6025: my $symbp=$symbparm;
6026: my $mapp=&deversion((&decode_symb($symbp))[0]);
6027:
6028: my $symbparm=$symbp.'.'.$spacequalifierrest;
6029: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
6030:
6031: if (($env{'user.name'} eq $uname) &&
6032: ($env{'user.domain'} eq $udom)) {
6033: $section=$env{'request.course.sec'};
6034: @groups = split(/:/,$env{'request.course.groups'});
6035: @groups=&sort_course_groups($courseid,@groups);
6036: } else {
6037: if (! defined($usection)) {
6038: $section=&getsection($udom,$uname,$courseid);
6039: } else {
6040: $section = $usection;
6041: }
6042: @groups = &get_users_groups($udom,$uname,$courseid);
6043: }
6044:
6045: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
6046: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
6047: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
6048:
6049: $courselevel=$courseid.'.'.$spacequalifierrest;
6050: my $courselevelr=$courseid.'.'.$symbparm;
6051: $courselevelm=$courseid.'.'.$mapparm;
6052:
6053: # ----------------------------------------------------------- first, check user
6054:
6055: my $userreply=&resdata($uname,$udom,'user',
6056: ($courselevelr,$courselevelm,
6057: $courselevel));
6058: if (defined($userreply)) { return $userreply; }
6059:
6060: # ------------------------------------------------ second, check some of course
6061: my $coursereply;
6062: if (@groups > 0) {
6063: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
6064: $mapparm,$spacequalifierrest);
6065: if (defined($coursereply)) { return $coursereply; }
6066: }
6067:
6068: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
6069: $env{'course.'.$courseid.'.domain'},
6070: 'course',
6071: ($seclevelr,$seclevelm,$seclevel,
6072: $courselevelr));
6073: if (defined($coursereply)) { return $coursereply; }
6074:
6075: # ------------------------------------------------------ third, check map parms
6076: my %parmhash=();
6077: my $thisparm='';
6078: if (tie(%parmhash,'GDBM_File',
6079: $env{'request.course.fn'}.'_parms.db',
6080: &GDBM_READER(),0640)) {
6081: $thisparm=$parmhash{$symbparm};
6082: untie(%parmhash);
6083: }
6084: if ($thisparm) { return $thisparm; }
6085: }
6086: # ------------------------------------------ fourth, look in resource metadata
6087:
6088: $spacequalifierrest=~s/\./\_/;
6089: my $filename;
6090: if (!$symbparm) { $symbparm=&symbread(); }
6091: if ($symbparm) {
6092: $filename=(&decode_symb($symbparm))[2];
6093: } else {
6094: $filename=$env{'request.filename'};
6095: }
6096: my $metadata=&metadata($filename,$spacequalifierrest);
6097: if (defined($metadata)) { return $metadata; }
6098: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
6099: if (defined($metadata)) { return $metadata; }
6100:
6101: # ---------------------------------------------- fourth, look in rest pf course
6102: if ($symbparm && defined($courseid) &&
6103: $courseid eq $env{'request.course.id'}) {
6104: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
6105: $env{'course.'.$courseid.'.domain'},
6106: 'course',
6107: ($courselevelm,$courselevel));
6108: if (defined($coursereply)) { return $coursereply; }
6109: }
6110: # ------------------------------------------------------------------ Cascade up
6111: unless ($space eq '0') {
6112: my @parts=split(/_/,$space);
6113: my $id=pop(@parts);
6114: my $part=join('_',@parts);
6115: if ($part eq '') { $part='0'; }
6116: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
6117: $symbparm,$udom,$uname,$section,1);
6118: if (defined($partgeneral)) { return $partgeneral; }
6119: }
6120: if ($recurse) { return undef; }
6121: my $pack_def=&packages_tab_default($filename,$varname);
6122: if (defined($pack_def)) { return $pack_def; }
6123:
6124: # ---------------------------------------------------- Any other user namespace
6125: } elsif ($realm eq 'environment') {
6126: # ----------------------------------------------------------------- environment
6127: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
6128: return $env{'environment.'.$spacequalifierrest};
6129: } else {
6130: if ($uname eq 'anonymous' && $udom eq '') {
6131: return '';
6132: }
6133: my %returnhash=&userenvironment($udom,$uname,
6134: $spacequalifierrest);
6135: return $returnhash{$spacequalifierrest};
6136: }
6137: } elsif ($realm eq 'system') {
6138: # ----------------------------------------------------------------- system.time
6139: if ($space eq 'time') {
6140: return time;
6141: }
6142: } elsif ($realm eq 'server') {
6143: # ----------------------------------------------------------------- system.time
6144: if ($space eq 'name') {
6145: return $ENV{'SERVER_NAME'};
6146: }
6147: }
6148: return '';
6149: }
6150:
6151: sub check_group_parms {
6152: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
6153: my @groupitems = ();
6154: my $resultitem;
6155: my @levels = ($symbparm,$mapparm,$what);
6156: foreach my $group (@{$groups}) {
6157: foreach my $level (@levels) {
6158: my $item = $courseid.'.['.$group.'].'.$level;
6159: push(@groupitems,$item);
6160: }
6161: }
6162: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
6163: $env{'course.'.$courseid.'.domain'},
6164: 'course',@groupitems);
6165: return $coursereply;
6166: }
6167:
6168: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
6169: my ($courseid,@groups) = @_;
6170: @groups = sort(@groups);
6171: return @groups;
6172: }
6173:
6174: sub packages_tab_default {
6175: my ($uri,$varname)=@_;
6176: my (undef,$part,$name)=split(/\./,$varname);
6177:
6178: my (@extension,@specifics,$do_default);
6179: foreach my $package (split(/,/,&metadata($uri,'packages'))) {
6180: my ($pack_type,$pack_part)=split(/_/,$package,2);
6181: if ($pack_type eq 'default') {
6182: $do_default=1;
6183: } elsif ($pack_type eq 'extension') {
6184: push(@extension,[$package,$pack_type,$pack_part]);
6185: } elsif ($pack_part eq $part) {
6186: # only look at packages defaults for packages that this id is
6187: push(@specifics,[$package,$pack_type,$pack_part]);
6188: }
6189: }
6190: # first look for a package that matches the requested part id
6191: foreach my $package (@specifics) {
6192: my (undef,$pack_type,$pack_part)=@{$package};
6193: next if ($pack_part ne $part);
6194: if (defined($packagetab{"$pack_type&$name&default"})) {
6195: return $packagetab{"$pack_type&$name&default"};
6196: }
6197: }
6198: # look for any possible matching non extension_ package
6199: foreach my $package (@specifics) {
6200: my (undef,$pack_type,$pack_part)=@{$package};
6201: if (defined($packagetab{"$pack_type&$name&default"})) {
6202: return $packagetab{"$pack_type&$name&default"};
6203: }
6204: if ($pack_type eq 'part') { $pack_part='0'; }
6205: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
6206: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
6207: }
6208: }
6209: # look for any posible extension_ match
6210: foreach my $package (@extension) {
6211: my ($package,$pack_type)=@{$package};
6212: if (defined($packagetab{"$pack_type&$name&default"})) {
6213: return $packagetab{"$pack_type&$name&default"};
6214: }
6215: if (defined($packagetab{$package."&$name&default"})) {
6216: return $packagetab{$package."&$name&default"};
6217: }
6218: }
6219: # look for a global default setting
6220: if ($do_default && defined($packagetab{"default&$name&default"})) {
6221: return $packagetab{"default&$name&default"};
6222: }
6223: return undef;
6224: }
6225:
6226: sub add_prefix_and_part {
6227: my ($prefix,$part)=@_;
6228: my $keyroot;
6229: if (defined($prefix) && $prefix !~ /^__/) {
6230: # prefix that has a part already
6231: $keyroot=$prefix;
6232: } elsif (defined($prefix)) {
6233: # prefix that is missing a part
6234: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
6235: } else {
6236: # no prefix at all
6237: if (defined($part)) { $keyroot='_'.$part; }
6238: }
6239: return $keyroot;
6240: }
6241:
6242: # ---------------------------------------------------------------- Get metadata
6243:
6244: my %metaentry;
6245: sub metadata {
6246: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
6247: $uri=&declutter($uri);
6248: # if it is a non metadata possible uri return quickly
6249: if (($uri eq '') ||
6250: (($uri =~ m|^/*adm/|) &&
6251: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
6252: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
6253: ($uri =~ m|home/$match_username/public_html/|)) {
6254: return undef;
6255: }
6256: my $filename=$uri;
6257: $uri=~s/\.meta$//;
6258: #
6259: # Is the metadata already cached?
6260: # Look at timestamp of caching
6261: # Everything is cached by the main uri, libraries are never directly cached
6262: #
6263: if (!defined($liburi)) {
6264: my ($result,$cached)=&is_cached_new('meta',$uri);
6265: if (defined($cached)) { return $result->{':'.$what}; }
6266: }
6267: {
6268: #
6269: # Is this a recursive call for a library?
6270: #
6271: # if (! exists($metacache{$uri})) {
6272: # $metacache{$uri}={};
6273: # }
6274: if ($liburi) {
6275: $liburi=&declutter($liburi);
6276: $filename=$liburi;
6277: } else {
6278: &devalidate_cache_new('meta',$uri);
6279: undef(%metaentry);
6280: }
6281: my %metathesekeys=();
6282: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
6283: my $metastring;
6284: if ($uri !~ m -^(editupload)/-) {
6285: my $file=&filelocation('',&clutter($filename));
6286: #push(@{$metaentry{$uri.'.file'}},$file);
6287: $metastring=&getfile($file);
6288: }
6289: my $parser=HTML::LCParser->new(\$metastring);
6290: my $token;
6291: undef %metathesekeys;
6292: while ($token=$parser->get_token) {
6293: if ($token->[0] eq 'S') {
6294: if (defined($token->[2]->{'package'})) {
6295: #
6296: # This is a package - get package info
6297: #
6298: my $package=$token->[2]->{'package'};
6299: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6300: if (defined($token->[2]->{'id'})) {
6301: $keyroot.='_'.$token->[2]->{'id'};
6302: }
6303: if ($metaentry{':packages'}) {
6304: $metaentry{':packages'}.=','.$package.$keyroot;
6305: } else {
6306: $metaentry{':packages'}=$package.$keyroot;
6307: }
6308: foreach my $pack_entry (keys(%packagetab)) {
6309: my $part=$keyroot;
6310: $part=~s/^\_//;
6311: if ($pack_entry=~/^\Q$package\E\&/ ||
6312: $pack_entry=~/^\Q$package\E_0\&/) {
6313: my ($pack,$name,$subp)=split(/\&/,$pack_entry);
6314: # ignore package.tab specified default values
6315: # here &package_tab_default() will fetch those
6316: if ($subp eq 'default') { next; }
6317: my $value=$packagetab{$pack_entry};
6318: my $unikey;
6319: if ($pack =~ /_0$/) {
6320: $unikey='parameter_0_'.$name;
6321: $part=0;
6322: } else {
6323: $unikey='parameter'.$keyroot.'_'.$name;
6324: }
6325: if ($subp eq 'display') {
6326: $value.=' [Part: '.$part.']';
6327: }
6328: $metaentry{':'.$unikey.'.part'}=$part;
6329: $metathesekeys{$unikey}=1;
6330: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6331: $metaentry{':'.$unikey.'.'.$subp}=$value;
6332: }
6333: if (defined($metaentry{':'.$unikey.'.default'})) {
6334: $metaentry{':'.$unikey}=
6335: $metaentry{':'.$unikey.'.default'};
6336: }
6337: }
6338: }
6339: } else {
6340: #
6341: # This is not a package - some other kind of start tag
6342: #
6343: my $entry=$token->[1];
6344: my $unikey;
6345: if ($entry eq 'import') {
6346: $unikey='';
6347: } else {
6348: $unikey=$entry;
6349: }
6350: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6351:
6352: if (defined($token->[2]->{'id'})) {
6353: $unikey.='_'.$token->[2]->{'id'};
6354: }
6355:
6356: if ($entry eq 'import') {
6357: #
6358: # Importing a library here
6359: #
6360: if ($depthcount<20) {
6361: my $location=$parser->get_text('/import');
6362: my $dir=$filename;
6363: $dir=~s|[^/]*$||;
6364: $location=&filelocation($dir,$location);
6365: my $metadata =
6366: &metadata($uri,'keys', $location,$unikey,
6367: $depthcount+1);
6368: foreach my $meta (split(',',$metadata)) {
6369: $metaentry{':'.$meta}=$metaentry{':'.$meta};
6370: $metathesekeys{$meta}=1;
6371: }
6372: }
6373: } else {
6374:
6375: if (defined($token->[2]->{'name'})) {
6376: $unikey.='_'.$token->[2]->{'name'};
6377: }
6378: $metathesekeys{$unikey}=1;
6379: foreach my $param (@{$token->[3]}) {
6380: $metaentry{':'.$unikey.'.'.$param} =
6381: $token->[2]->{$param};
6382: }
6383: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
6384: my $default=$metaentry{':'.$unikey.'.default'};
6385: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
6386: # only ws inside the tag, and not in default, so use default
6387: # as value
6388: $metaentry{':'.$unikey}=$default;
6389: } else {
6390: # either something interesting inside the tag or default
6391: # uninteresting
6392: $metaentry{':'.$unikey}=$internaltext;
6393: }
6394: # end of not-a-package not-a-library import
6395: }
6396: # end of not-a-package start tag
6397: }
6398: # the next is the end of "start tag"
6399: }
6400: }
6401: my ($extension) = ($uri =~ /\.(\w+)$/);
6402: foreach my $key (keys(%packagetab)) {
6403: #no specific packages #how's our extension
6404: if ($key!~/^extension_\Q$extension\E&/) { next; }
6405: &metadata_create_package_def($uri,$key,'extension_'.$extension,
6406: \%metathesekeys);
6407: }
6408: if (!exists($metaentry{':packages'})) {
6409: foreach my $key (keys(%packagetab)) {
6410: #no specific packages well let's get default then
6411: if ($key!~/^default&/) { next; }
6412: &metadata_create_package_def($uri,$key,'default',
6413: \%metathesekeys);
6414: }
6415: }
6416: # are there custom rights to evaluate
6417: if ($metaentry{':copyright'} eq 'custom') {
6418:
6419: #
6420: # Importing a rights file here
6421: #
6422: unless ($depthcount) {
6423: my $location=$metaentry{':customdistributionfile'};
6424: my $dir=$filename;
6425: $dir=~s|[^/]*$||;
6426: $location=&filelocation($dir,$location);
6427: my $rights_metadata =
6428: &metadata($uri,'keys',$location,'_rights',
6429: $depthcount+1);
6430: foreach my $rights (split(',',$rights_metadata)) {
6431: #$metaentry{':'.$rights}=$metacache{$uri}->{':'.$rights};
6432: $metathesekeys{$rights}=1;
6433: }
6434: }
6435: }
6436: # uniqifiy package listing
6437: my %seen;
6438: my @uniq_packages =
6439: grep { ! $seen{$_} ++ } (split(',',$metaentry{':packages'}));
6440: $metaentry{':packages'} = join(',',@uniq_packages);
6441:
6442: $metaentry{':keys'} = join(',',keys(%metathesekeys));
6443: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
6444: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
6445: &do_cache_new('meta',$uri,\%metaentry,60*60);
6446: # this is the end of "was not already recently cached
6447: }
6448: return $metaentry{':'.$what};
6449: }
6450:
6451: sub metadata_create_package_def {
6452: my ($uri,$key,$package,$metathesekeys)=@_;
6453: my ($pack,$name,$subp)=split(/\&/,$key);
6454: if ($subp eq 'default') { next; }
6455:
6456: if (defined($metaentry{':packages'})) {
6457: $metaentry{':packages'}.=','.$package;
6458: } else {
6459: $metaentry{':packages'}=$package;
6460: }
6461: my $value=$packagetab{$key};
6462: my $unikey;
6463: $unikey='parameter_0_'.$name;
6464: $metaentry{':'.$unikey.'.part'}=0;
6465: $$metathesekeys{$unikey}=1;
6466: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6467: $metaentry{':'.$unikey.'.'.$subp}=$value;
6468: }
6469: if (defined($metaentry{':'.$unikey.'.default'})) {
6470: $metaentry{':'.$unikey}=
6471: $metaentry{':'.$unikey.'.default'};
6472: }
6473: }
6474:
6475: sub metadata_generate_part0 {
6476: my ($metadata,$metacache,$uri) = @_;
6477: my %allnames;
6478: foreach my $metakey (keys(%$metadata)) {
6479: if ($metakey=~/^parameter\_(.*)/) {
6480: my $part=$$metacache{':'.$metakey.'.part'};
6481: my $name=$$metacache{':'.$metakey.'.name'};
6482: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
6483: $allnames{$name}=$part;
6484: }
6485: }
6486: }
6487: foreach my $name (keys(%allnames)) {
6488: $$metadata{"parameter_0_$name"}=1;
6489: my $key=":parameter_0_$name";
6490: $$metacache{"$key.part"}='0';
6491: $$metacache{"$key.name"}=$name;
6492: $$metacache{"$key.type"}=$$metacache{':parameter_'.
6493: $allnames{$name}.'_'.$name.
6494: '.type'};
6495: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
6496: '.display'};
6497: my $expr='[Part: '.$allnames{$name}.']';
6498: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
6499: $$metacache{"$key.display"}=$olddis;
6500: }
6501: }
6502:
6503: # ------------------------------------------------------ Devalidate title cache
6504:
6505: sub devalidate_title_cache {
6506: my ($url)=@_;
6507: if (!$env{'request.course.id'}) { return; }
6508: my $symb=&symbread($url);
6509: if (!$symb) { return; }
6510: my $key=$env{'request.course.id'}."\0".$symb;
6511: &devalidate_cache_new('title',$key);
6512: }
6513:
6514: # ------------------------------------------------- Get the title of a resource
6515:
6516: sub gettitle {
6517: my $urlsymb=shift;
6518: my $symb=&symbread($urlsymb);
6519: if ($symb) {
6520: my $key=$env{'request.course.id'}."\0".$symb;
6521: my ($result,$cached)=&is_cached_new('title',$key);
6522: if (defined($cached)) {
6523: return $result;
6524: }
6525: my ($map,$resid,$url)=&decode_symb($symb);
6526: my $title='';
6527: my %bighash;
6528: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6529: &GDBM_READER(),0640)) {
6530: my $mapid=$bighash{'map_pc_'.&clutter($map)};
6531: $title=$bighash{'title_'.$mapid.'.'.$resid};
6532: untie %bighash;
6533: }
6534: $title=~s/\&colon\;/\:/gs;
6535: if ($title) {
6536: return &do_cache_new('title',$key,$title,600);
6537: }
6538: $urlsymb=$url;
6539: }
6540: my $title=&metadata($urlsymb,'title');
6541: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
6542: return $title;
6543: }
6544:
6545: sub get_slot {
6546: my ($which,$cnum,$cdom)=@_;
6547: if (!$cnum || !$cdom) {
6548: (undef,my $courseid)=&whichuser();
6549: $cdom=$env{'course.'.$courseid.'.domain'};
6550: $cnum=$env{'course.'.$courseid.'.num'};
6551: }
6552: my $key=join("\0",'slots',$cdom,$cnum,$which);
6553: my %slotinfo;
6554: if (exists($remembered{$key})) {
6555: $slotinfo{$which} = $remembered{$key};
6556: } else {
6557: %slotinfo=&get('slots',[$which],$cdom,$cnum);
6558: &Apache::lonhomework::showhash(%slotinfo);
6559: my ($tmp)=keys(%slotinfo);
6560: if ($tmp=~/^error:/) { return (); }
6561: $remembered{$key} = $slotinfo{$which};
6562: }
6563: if (ref($slotinfo{$which}) eq 'HASH') {
6564: return %{$slotinfo{$which}};
6565: }
6566: return $slotinfo{$which};
6567: }
6568: # ------------------------------------------------- Update symbolic store links
6569:
6570: sub symblist {
6571: my ($mapname,%newhash)=@_;
6572: $mapname=&deversion(&declutter($mapname));
6573: my %hash;
6574: if (($env{'request.course.fn'}) && (%newhash)) {
6575: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6576: &GDBM_WRCREAT(),0640)) {
6577: foreach my $url (keys %newhash) {
6578: next if ($url eq 'last_known'
6579: && $env{'form.no_update_last_known'});
6580: $hash{declutter($url)}=&encode_symb($mapname,
6581: $newhash{$url}->[1],
6582: $newhash{$url}->[0]);
6583: }
6584: if (untie(%hash)) {
6585: return 'ok';
6586: }
6587: }
6588: }
6589: return 'error';
6590: }
6591:
6592: # --------------------------------------------------------------- Verify a symb
6593:
6594: sub symbverify {
6595: my ($symb,$thisurl)=@_;
6596: my $thisfn=$thisurl;
6597: $thisfn=&declutter($thisfn);
6598: # direct jump to resource in page or to a sequence - will construct own symbs
6599: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
6600: # check URL part
6601: my ($map,$resid,$url)=&decode_symb($symb);
6602:
6603: unless ($url eq $thisfn) { return 0; }
6604:
6605: $symb=&symbclean($symb);
6606: $thisurl=&deversion($thisurl);
6607: $thisfn=&deversion($thisfn);
6608:
6609: my %bighash;
6610: my $okay=0;
6611:
6612: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6613: &GDBM_READER(),0640)) {
6614: my $ids=$bighash{'ids_'.&clutter($thisurl)};
6615: unless ($ids) {
6616: $ids=$bighash{'ids_/'.$thisurl};
6617: }
6618: if ($ids) {
6619: # ------------------------------------------------------------------- Has ID(s)
6620: foreach my $id (split(/\,/,$ids)) {
6621: my ($mapid,$resid)=split(/\./,$id);
6622: if (
6623: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
6624: eq $symb) {
6625: if (($env{'request.role.adv'}) ||
6626: $bighash{'encrypted_'.$id} eq $env{'request.enc'}) {
6627: $okay=1;
6628: }
6629: }
6630: }
6631: }
6632: untie(%bighash);
6633: }
6634: return $okay;
6635: }
6636:
6637: # --------------------------------------------------------------- Clean-up symb
6638:
6639: sub symbclean {
6640: my $symb=shift;
6641: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6642: # remove version from map
6643: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
6644:
6645: # remove version from URL
6646: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
6647:
6648: # remove wrapper
6649:
6650: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
6651: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
6652: return $symb;
6653: }
6654:
6655: # ---------------------------------------------- Split symb to find map and url
6656:
6657: sub encode_symb {
6658: my ($map,$resid,$url)=@_;
6659: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
6660: }
6661:
6662: sub decode_symb {
6663: my $symb=shift;
6664: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6665: my ($map,$resid,$url)=split(/___/,$symb);
6666: return (&fixversion($map),$resid,&fixversion($url));
6667: }
6668:
6669: sub fixversion {
6670: my $fn=shift;
6671: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
6672: my %bighash;
6673: my $uri=&clutter($fn);
6674: my $key=$env{'request.course.id'}.'_'.$uri;
6675: # is this cached?
6676: my ($result,$cached)=&is_cached_new('courseresversion',$key);
6677: if (defined($cached)) { return $result; }
6678: # unfortunately not cached, or expired
6679: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6680: &GDBM_READER(),0640)) {
6681: if ($bighash{'version_'.$uri}) {
6682: my $version=$bighash{'version_'.$uri};
6683: unless (($version eq 'mostrecent') ||
6684: ($version==&getversion($uri))) {
6685: $uri=~s/\.(\w+)$/\.$version\.$1/;
6686: }
6687: }
6688: untie %bighash;
6689: }
6690: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
6691: }
6692:
6693: sub deversion {
6694: my $url=shift;
6695: $url=~s/\.\d+\.(\w+)$/\.$1/;
6696: return $url;
6697: }
6698:
6699: # ------------------------------------------------------ Return symb list entry
6700:
6701: sub symbread {
6702: my ($thisfn,$donotrecurse)=@_;
6703: my $cache_str='request.symbread.cached.'.$thisfn;
6704: if (defined($env{$cache_str})) { return $env{$cache_str}; }
6705: # no filename provided? try from environment
6706: unless ($thisfn) {
6707: if ($env{'request.symb'}) {
6708: return $env{$cache_str}=&symbclean($env{'request.symb'});
6709: }
6710: $thisfn=$env{'request.filename'};
6711: }
6712: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
6713: # is that filename actually a symb? Verify, clean, and return
6714: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
6715: if (&symbverify($thisfn,$1)) {
6716: return $env{$cache_str}=&symbclean($thisfn);
6717: }
6718: }
6719: $thisfn=declutter($thisfn);
6720: my %hash;
6721: my %bighash;
6722: my $syval='';
6723: if (($env{'request.course.fn'}) && ($thisfn)) {
6724: my $targetfn = $thisfn;
6725: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
6726: $targetfn = 'adm/wrapper/'.$thisfn;
6727: }
6728: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
6729: $targetfn=$1;
6730: }
6731: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6732: &GDBM_READER(),0640)) {
6733: $syval=$hash{$targetfn};
6734: untie(%hash);
6735: }
6736: # ---------------------------------------------------------- There was an entry
6737: if ($syval) {
6738: #unless ($syval=~/\_\d+$/) {
6739: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
6740: #&appenv('request.ambiguous' => $thisfn);
6741: #return $env{$cache_str}='';
6742: #}
6743: #$syval.=$1;
6744: #}
6745: } else {
6746: # ------------------------------------------------------- Was not in symb table
6747: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6748: &GDBM_READER(),0640)) {
6749: # ---------------------------------------------- Get ID(s) for current resource
6750: my $ids=$bighash{'ids_'.&clutter($thisfn)};
6751: unless ($ids) {
6752: $ids=$bighash{'ids_/'.$thisfn};
6753: }
6754: unless ($ids) {
6755: # alias?
6756: $ids=$bighash{'mapalias_'.$thisfn};
6757: }
6758: if ($ids) {
6759: # ------------------------------------------------------------------- Has ID(s)
6760: my @possibilities=split(/\,/,$ids);
6761: if ($#possibilities==0) {
6762: # ----------------------------------------------- There is only one possibility
6763: my ($mapid,$resid)=split(/\./,$ids);
6764: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6765: $resid,$thisfn);
6766: } elsif (!$donotrecurse) {
6767: # ------------------------------------------ There is more than one possibility
6768: my $realpossible=0;
6769: foreach my $id (@possibilities) {
6770: my $file=$bighash{'src_'.$id};
6771: if (&allowed('bre',$file)) {
6772: my ($mapid,$resid)=split(/\./,$id);
6773: if ($bighash{'map_type_'.$mapid} ne 'page') {
6774: $realpossible++;
6775: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6776: $resid,$thisfn);
6777: }
6778: }
6779: }
6780: if ($realpossible!=1) { $syval=''; }
6781: } else {
6782: $syval='';
6783: }
6784: }
6785: untie(%bighash)
6786: }
6787: }
6788: if ($syval) {
6789: return $env{$cache_str}=$syval;
6790: }
6791: }
6792: &appenv('request.ambiguous' => $thisfn);
6793: return $env{$cache_str}='';
6794: }
6795:
6796: # ---------------------------------------------------------- Return random seed
6797:
6798: sub numval {
6799: my $txt=shift;
6800: $txt=~tr/A-J/0-9/;
6801: $txt=~tr/a-j/0-9/;
6802: $txt=~tr/K-T/0-9/;
6803: $txt=~tr/k-t/0-9/;
6804: $txt=~tr/U-Z/0-5/;
6805: $txt=~tr/u-z/0-5/;
6806: $txt=~s/\D//g;
6807: if ($_64bit) { if ($txt > 2**32) { return -1; } }
6808: return int($txt);
6809: }
6810:
6811: sub numval2 {
6812: my $txt=shift;
6813: $txt=~tr/A-J/0-9/;
6814: $txt=~tr/a-j/0-9/;
6815: $txt=~tr/K-T/0-9/;
6816: $txt=~tr/k-t/0-9/;
6817: $txt=~tr/U-Z/0-5/;
6818: $txt=~tr/u-z/0-5/;
6819: $txt=~s/\D//g;
6820: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6821: my $total;
6822: foreach my $val (@txts) { $total+=$val; }
6823: if ($_64bit) { if ($total > 2**32) { return -1; } }
6824: return int($total);
6825: }
6826:
6827: sub numval3 {
6828: use integer;
6829: my $txt=shift;
6830: $txt=~tr/A-J/0-9/;
6831: $txt=~tr/a-j/0-9/;
6832: $txt=~tr/K-T/0-9/;
6833: $txt=~tr/k-t/0-9/;
6834: $txt=~tr/U-Z/0-5/;
6835: $txt=~tr/u-z/0-5/;
6836: $txt=~s/\D//g;
6837: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6838: my $total;
6839: foreach my $val (@txts) { $total+=$val; }
6840: if ($_64bit) { $total=(($total<<32)>>32); }
6841: return $total;
6842: }
6843:
6844: sub digest {
6845: my ($data)=@_;
6846: my $digest=&Digest::MD5::md5($data);
6847: my ($a,$b,$c,$d)=unpack("iiii",$digest);
6848: my ($e,$f);
6849: {
6850: use integer;
6851: $e=($a+$b);
6852: $f=($c+$d);
6853: if ($_64bit) {
6854: $e=(($e<<32)>>32);
6855: $f=(($f<<32)>>32);
6856: }
6857: }
6858: if (wantarray) {
6859: return ($e,$f);
6860: } else {
6861: my $g;
6862: {
6863: use integer;
6864: $g=($e+$f);
6865: if ($_64bit) {
6866: $g=(($g<<32)>>32);
6867: }
6868: }
6869: return $g;
6870: }
6871: }
6872:
6873: sub latest_rnd_algorithm_id {
6874: return '64bit5';
6875: }
6876:
6877: sub get_rand_alg {
6878: my ($courseid)=@_;
6879: if (!$courseid) { $courseid=(&whichuser())[1]; }
6880: if ($courseid) {
6881: return $env{"course.$courseid.rndseed"};
6882: }
6883: return &latest_rnd_algorithm_id();
6884: }
6885:
6886: sub validCODE {
6887: my ($CODE)=@_;
6888: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
6889: return 0;
6890: }
6891:
6892: sub getCODE {
6893: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
6894: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
6895: defined($Apache::lonhomework::parsing_a_task) ) &&
6896: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
6897: return $Apache::lonhomework::history{'resource.CODE'};
6898: }
6899: return undef;
6900: }
6901:
6902: sub rndseed {
6903: my ($symb,$courseid,$domain,$username)=@_;
6904:
6905: my ($wsymb,$wcourseid,$wdomain,$wusername)=&whichuser();
6906: if (!$symb) {
6907: unless ($symb=$wsymb) { return time; }
6908: }
6909: if (!$courseid) { $courseid=$wcourseid; }
6910: if (!$domain) { $domain=$wdomain; }
6911: if (!$username) { $username=$wusername }
6912: my $which=&get_rand_alg();
6913:
6914: if (defined(&getCODE())) {
6915: if ($which eq '64bit5') {
6916: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
6917: } elsif ($which eq '64bit4') {
6918: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
6919: } else {
6920: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
6921: }
6922: } elsif ($which eq '64bit5') {
6923: return &rndseed_64bit5($symb,$courseid,$domain,$username);
6924: } elsif ($which eq '64bit4') {
6925: return &rndseed_64bit4($symb,$courseid,$domain,$username);
6926: } elsif ($which eq '64bit3') {
6927: return &rndseed_64bit3($symb,$courseid,$domain,$username);
6928: } elsif ($which eq '64bit2') {
6929: return &rndseed_64bit2($symb,$courseid,$domain,$username);
6930: } elsif ($which eq '64bit') {
6931: return &rndseed_64bit($symb,$courseid,$domain,$username);
6932: }
6933: return &rndseed_32bit($symb,$courseid,$domain,$username);
6934: }
6935:
6936: sub rndseed_32bit {
6937: my ($symb,$courseid,$domain,$username)=@_;
6938: {
6939: use integer;
6940: my $symbchck=unpack("%32C*",$symb) << 27;
6941: my $symbseed=numval($symb) << 22;
6942: my $namechck=unpack("%32C*",$username) << 17;
6943: my $nameseed=numval($username) << 12;
6944: my $domainseed=unpack("%32C*",$domain) << 7;
6945: my $courseseed=unpack("%32C*",$courseid);
6946: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
6947: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6948: #&logthis("rndseed :$num:$symb");
6949: if ($_64bit) { $num=(($num<<32)>>32); }
6950: return $num;
6951: }
6952: }
6953:
6954: sub rndseed_64bit {
6955: my ($symb,$courseid,$domain,$username)=@_;
6956: {
6957: use integer;
6958: my $symbchck=unpack("%32S*",$symb) << 21;
6959: my $symbseed=numval($symb) << 10;
6960: my $namechck=unpack("%32S*",$username);
6961:
6962: my $nameseed=numval($username) << 21;
6963: my $domainseed=unpack("%32S*",$domain) << 10;
6964: my $courseseed=unpack("%32S*",$courseid);
6965:
6966: my $num1=$symbchck+$symbseed+$namechck;
6967: my $num2=$nameseed+$domainseed+$courseseed;
6968: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6969: #&logthis("rndseed :$num:$symb");
6970: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6971: return "$num1,$num2";
6972: }
6973: }
6974:
6975: sub rndseed_64bit2 {
6976: my ($symb,$courseid,$domain,$username)=@_;
6977: {
6978: use integer;
6979: # strings need to be an even # of cahracters long, it it is odd the
6980: # last characters gets thrown away
6981: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6982: my $symbseed=numval($symb) << 10;
6983: my $namechck=unpack("%32S*",$username.' ');
6984:
6985: my $nameseed=numval($username) << 21;
6986: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6987: my $courseseed=unpack("%32S*",$courseid.' ');
6988:
6989: my $num1=$symbchck+$symbseed+$namechck;
6990: my $num2=$nameseed+$domainseed+$courseseed;
6991: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6992: #&logthis("rndseed :$num:$symb");
6993: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6994: return "$num1,$num2";
6995: }
6996: }
6997:
6998: sub rndseed_64bit3 {
6999: my ($symb,$courseid,$domain,$username)=@_;
7000: {
7001: use integer;
7002: # strings need to be an even # of cahracters long, it it is odd the
7003: # last characters gets thrown away
7004: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7005: my $symbseed=numval2($symb) << 10;
7006: my $namechck=unpack("%32S*",$username.' ');
7007:
7008: my $nameseed=numval2($username) << 21;
7009: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7010: my $courseseed=unpack("%32S*",$courseid.' ');
7011:
7012: my $num1=$symbchck+$symbseed+$namechck;
7013: my $num2=$nameseed+$domainseed+$courseseed;
7014: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7015: #&logthis("rndseed :$num1:$num2:$_64bit");
7016: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7017:
7018: return "$num1:$num2";
7019: }
7020: }
7021:
7022: sub rndseed_64bit4 {
7023: my ($symb,$courseid,$domain,$username)=@_;
7024: {
7025: use integer;
7026: # strings need to be an even # of cahracters long, it it is odd the
7027: # last characters gets thrown away
7028: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7029: my $symbseed=numval3($symb) << 10;
7030: my $namechck=unpack("%32S*",$username.' ');
7031:
7032: my $nameseed=numval3($username) << 21;
7033: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7034: my $courseseed=unpack("%32S*",$courseid.' ');
7035:
7036: my $num1=$symbchck+$symbseed+$namechck;
7037: my $num2=$nameseed+$domainseed+$courseseed;
7038: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7039: #&logthis("rndseed :$num1:$num2:$_64bit");
7040: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7041:
7042: return "$num1:$num2";
7043: }
7044: }
7045:
7046: sub rndseed_64bit5 {
7047: my ($symb,$courseid,$domain,$username)=@_;
7048: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
7049: return "$num1:$num2";
7050: }
7051:
7052: sub rndseed_CODE_64bit {
7053: my ($symb,$courseid,$domain,$username)=@_;
7054: {
7055: use integer;
7056: my $symbchck=unpack("%32S*",$symb.' ') << 16;
7057: my $symbseed=numval2($symb);
7058: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
7059: my $CODEseed=numval(&getCODE());
7060: my $courseseed=unpack("%32S*",$courseid.' ');
7061: my $num1=$symbseed+$CODEchck;
7062: my $num2=$CODEseed+$courseseed+$symbchck;
7063: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
7064: #&logthis("rndseed :$num1:$num2:$symb");
7065: if ($_64bit) { $num1=(($num1<<32)>>32); }
7066: if ($_64bit) { $num2=(($num2<<32)>>32); }
7067: return "$num1:$num2";
7068: }
7069: }
7070:
7071: sub rndseed_CODE_64bit4 {
7072: my ($symb,$courseid,$domain,$username)=@_;
7073: {
7074: use integer;
7075: my $symbchck=unpack("%32S*",$symb.' ') << 16;
7076: my $symbseed=numval3($symb);
7077: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
7078: my $CODEseed=numval3(&getCODE());
7079: my $courseseed=unpack("%32S*",$courseid.' ');
7080: my $num1=$symbseed+$CODEchck;
7081: my $num2=$CODEseed+$courseseed+$symbchck;
7082: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
7083: #&logthis("rndseed :$num1:$num2:$symb");
7084: if ($_64bit) { $num1=(($num1<<32)>>32); }
7085: if ($_64bit) { $num2=(($num2<<32)>>32); }
7086: return "$num1:$num2";
7087: }
7088: }
7089:
7090: sub rndseed_CODE_64bit5 {
7091: my ($symb,$courseid,$domain,$username)=@_;
7092: my $code = &getCODE();
7093: my ($num1,$num2)=&digest("$symb,$courseid,$code");
7094: return "$num1:$num2";
7095: }
7096:
7097: sub setup_random_from_rndseed {
7098: my ($rndseed)=@_;
7099: if ($rndseed =~/([,:])/) {
7100: my ($num1,$num2)=split(/[,:]/,$rndseed);
7101: &Math::Random::random_set_seed(abs($num1),abs($num2));
7102: } else {
7103: &Math::Random::random_set_seed_from_phrase($rndseed);
7104: }
7105: }
7106:
7107: sub latest_receipt_algorithm_id {
7108: return 'receipt3';
7109: }
7110:
7111: sub recunique {
7112: my $fucourseid=shift;
7113: my $unique;
7114: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
7115: $env{"course.$fucourseid.receiptalg"} eq 'receipt3' ) {
7116: $unique=$env{"course.$fucourseid.internal.encseed"};
7117: } else {
7118: $unique=$perlvar{'lonReceipt'};
7119: }
7120: return unpack("%32C*",$unique);
7121: }
7122:
7123: sub recprefix {
7124: my $fucourseid=shift;
7125: my $prefix;
7126: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2'||
7127: $env{"course.$fucourseid.receiptalg"} eq 'receipt3' ) {
7128: $prefix=$env{"course.$fucourseid.internal.encpref"};
7129: } else {
7130: $prefix=$perlvar{'lonHostID'};
7131: }
7132: return unpack("%32C*",$prefix);
7133: }
7134:
7135: sub ireceipt {
7136: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
7137:
7138: my $return =&recprefix($fucourseid).'-';
7139:
7140: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt3' ||
7141: $env{'request.state'} eq 'construct') {
7142: $return .= (&digest("$funame,$fudom,$fucourseid,$fusymb,$part")%10000);
7143: return $return;
7144: }
7145:
7146: my $cuname=unpack("%32C*",$funame);
7147: my $cudom=unpack("%32C*",$fudom);
7148: my $cucourseid=unpack("%32C*",$fucourseid);
7149: my $cusymb=unpack("%32C*",$fusymb);
7150: my $cunique=&recunique($fucourseid);
7151: my $cpart=unpack("%32S*",$part);
7152: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
7153:
7154: #&logthis("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname)." and ".($cpart%$cudom));
7155:
7156: $return.= ($cunique%$cuname+
7157: $cunique%$cudom+
7158: $cusymb%$cuname+
7159: $cusymb%$cudom+
7160: $cucourseid%$cuname+
7161: $cucourseid%$cudom+
7162: $cpart%$cuname+
7163: $cpart%$cudom);
7164: } else {
7165: $return.= ($cunique%$cuname+
7166: $cunique%$cudom+
7167: $cusymb%$cuname+
7168: $cusymb%$cudom+
7169: $cucourseid%$cuname+
7170: $cucourseid%$cudom);
7171: }
7172: return $return;
7173: }
7174:
7175: sub receipt {
7176: my ($part)=@_;
7177: my ($symb,$courseid,$domain,$name) = &whichuser();
7178: return &ireceipt($name,$domain,$courseid,$symb,$part);
7179: }
7180:
7181: sub whichuser {
7182: my ($passedsymb)=@_;
7183: my ($symb,$courseid,$domain,$name,$publicuser);
7184: if (defined($env{'form.grade_symb'})) {
7185: my ($tmp_courseid)=&get_env_multiple('form.grade_courseid');
7186: my $allowed=&allowed('vgr',$tmp_courseid);
7187: if (!$allowed &&
7188: exists($env{'request.course.sec'}) &&
7189: $env{'request.course.sec'} !~ /^\s*$/) {
7190: $allowed=&allowed('vgr',$tmp_courseid.
7191: '/'.$env{'request.course.sec'});
7192: }
7193: if ($allowed) {
7194: ($symb)=&get_env_multiple('form.grade_symb');
7195: $courseid=$tmp_courseid;
7196: ($domain)=&get_env_multiple('form.grade_domain');
7197: ($name)=&get_env_multiple('form.grade_username');
7198: return ($symb,$courseid,$domain,$name,$publicuser);
7199: }
7200: }
7201: if (!$passedsymb) {
7202: $symb=&symbread();
7203: } else {
7204: $symb=$passedsymb;
7205: }
7206: $courseid=$env{'request.course.id'};
7207: $domain=$env{'user.domain'};
7208: $name=$env{'user.name'};
7209: if ($name eq 'public' && $domain eq 'public') {
7210: if (!defined($env{'form.username'})) {
7211: $env{'form.username'}.=time.rand(10000000);
7212: }
7213: $name.=$env{'form.username'};
7214: }
7215: return ($symb,$courseid,$domain,$name,$publicuser);
7216:
7217: }
7218:
7219: # ------------------------------------------------------------ Serves up a file
7220: # returns either the contents of the file or
7221: # -1 if the file doesn't exist
7222: #
7223: # if the target is a file that was uploaded via DOCS,
7224: # a check will be made to see if a current copy exists on the local server,
7225: # if it does this will be served, otherwise a copy will be retrieved from
7226: # the home server for the course and stored in /home/httpd/html/userfiles on
7227: # the local server.
7228:
7229: sub getfile {
7230: my ($file) = @_;
7231: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
7232: &repcopy($file);
7233: return &readfile($file);
7234: }
7235:
7236: sub repcopy_userfile {
7237: my ($file)=@_;
7238: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
7239: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
7240: my ($cdom,$cnum,$filename) =
7241: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+($match_domain)/+($match_name)/+(.*)|);
7242: my $uri="/uploaded/$cdom/$cnum/$filename";
7243: if (-e "$file") {
7244: # we already have a local copy, check it out
7245: my @fileinfo = stat($file);
7246: my $rtncode;
7247: my $info;
7248: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
7249: if ($lwpresp ne 'ok') {
7250: # there is no such file anymore, even though we had a local copy
7251: if ($rtncode eq '404') {
7252: unlink($file);
7253: }
7254: return -1;
7255: }
7256: if ($info < $fileinfo[9]) {
7257: # nice, the file we have is up-to-date, just say okay
7258: return 'ok';
7259: } else {
7260: # the file is outdated, get rid of it
7261: unlink($file);
7262: }
7263: }
7264: # one way or the other, at this point, we don't have the file
7265: # construct the correct path for the file
7266: my @parts = ($cdom,$cnum);
7267: if ($filename =~ m|^(.+)/[^/]+$|) {
7268: push @parts, split(/\//,$1);
7269: }
7270: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
7271: foreach my $part (@parts) {
7272: $path .= '/'.$part;
7273: if (!-e $path) {
7274: mkdir($path,0770);
7275: }
7276: }
7277: # now the path exists for sure
7278: # get a user agent
7279: my $ua=new LWP::UserAgent;
7280: my $transferfile=$file.'.in.transfer';
7281: # FIXME: this should flock
7282: if (-e $transferfile) { return 'ok'; }
7283: my $request;
7284: $uri=~s/^\///;
7285: $request=new HTTP::Request('GET','http://'.&hostname(&homeserver($cnum,$cdom)).'/raw/'.$uri);
7286: my $response=$ua->request($request,$transferfile);
7287: # did it work?
7288: if ($response->is_error()) {
7289: unlink($transferfile);
7290: &logthis("Userfile repcopy failed for $uri");
7291: return -1;
7292: }
7293: # worked, rename the transfer file
7294: rename($transferfile,$file);
7295: return 'ok';
7296: }
7297:
7298: sub tokenwrapper {
7299: my $uri=shift;
7300: $uri=~s|^http\://([^/]+)||;
7301: $uri=~s|^/||;
7302: $env{'user.environment'}=~/\/([^\/]+)\.id/;
7303: my $token=$1;
7304: my (undef,$udom,$uname,$file)=split('/',$uri,4);
7305: if ($udom && $uname && $file) {
7306: $file=~s|(\?\.*)*$||;
7307: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
7308: return 'http://'.&hostname(&homeserver($uname,$udom)).'/'.$uri.
7309: (($uri=~/\?/)?'&':'?').'token='.$token.
7310: '&tokenissued='.$perlvar{'lonHostID'};
7311: } else {
7312: return '/adm/notfound.html';
7313: }
7314: }
7315:
7316: # call with reqtype HEAD: get last modification time
7317: # call with reqtype GET: get the file contents
7318: # Do not call this with reqtype GET for large files! It loads everything into memory
7319: #
7320: sub getuploaded {
7321: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
7322: $uri=~s/^\///;
7323: $uri = 'http://'.&hostname(&homeserver($cnum,$cdom)).'/raw/'.$uri;
7324: my $ua=new LWP::UserAgent;
7325: my $request=new HTTP::Request($reqtype,$uri);
7326: my $response=$ua->request($request);
7327: $$rtncode = $response->code;
7328: if (! $response->is_success()) {
7329: return 'failed';
7330: }
7331: if ($reqtype eq 'HEAD') {
7332: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
7333: } elsif ($reqtype eq 'GET') {
7334: $$info = $response->content;
7335: }
7336: return 'ok';
7337: }
7338:
7339: sub readfile {
7340: my $file = shift;
7341: if ( (! -e $file ) || ($file eq '') ) { return -1; };
7342: my $fh;
7343: open($fh,"<$file");
7344: my $a='';
7345: while (my $line = <$fh>) { $a .= $line; }
7346: return $a;
7347: }
7348:
7349: sub filelocation {
7350: my ($dir,$file) = @_;
7351: my $location;
7352: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
7353:
7354: if ($file =~ m-^/adm/-) {
7355: $file=~s-^/adm/wrapper/-/-;
7356: $file=~s-^/adm/coursedocs/showdoc/-/-;
7357: }
7358: if ($file=~m:^/~:) { # is a contruction space reference
7359: $location = $file;
7360: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
7361: } elsif ($file=~m{^/home/$match_username/public_html/}) {
7362: # is a correct contruction space reference
7363: $location = $file;
7364: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
7365: my ($udom,$uname,$filename)=
7366: ($file=~m -^/+(?:uploaded|editupload)/+($match_domain)/+($match_name)/+(.*)$-);
7367: my $home=&homeserver($uname,$udom);
7368: my $is_me=0;
7369: my @ids=¤t_machine_ids();
7370: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
7371: if ($is_me) {
7372: $location=&propath($udom,$uname).
7373: '/userfiles/'.$filename;
7374: } else {
7375: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
7376: $udom.'/'.$uname.'/'.$filename;
7377: }
7378: } else {
7379: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7380: $file=~s:^/res/:/:;
7381: if ( !( $file =~ m:^/:) ) {
7382: $location = $dir. '/'.$file;
7383: } else {
7384: $location = '/home/httpd/html/res'.$file;
7385: }
7386: }
7387: $location=~s://+:/:g; # remove duplicate /
7388: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
7389: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
7390: return $location;
7391: }
7392:
7393: sub hreflocation {
7394: my ($dir,$file)=@_;
7395: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
7396: $file=filelocation($dir,$file);
7397: } elsif ($file=~m-^/adm/-) {
7398: $file=~s-^/adm/wrapper/-/-;
7399: $file=~s-^/adm/coursedocs/showdoc/-/-;
7400: }
7401: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
7402: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
7403: } elsif ($file=~m-/home/($match_username)/public_html/-) {
7404: $file=~s-^/home/($match_username)/public_html/-/~$1/-;
7405: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
7406: $file=~s-^/home/httpd/lonUsers/($match_domain)/./././($match_name)/userfiles/
7407: -/uploaded/$1/$2/-x;
7408: }
7409: return $file;
7410: }
7411:
7412: sub current_machine_domains {
7413: my $hostname=&hostname($perlvar{'lonHostID'});
7414: my @domains;
7415: my %hostname = &all_hostnames();
7416: while( my($id, $name) = each(%hostname)) {
7417: # &logthis("-$id-$name-$hostname-");
7418: if ($hostname eq $name) {
7419: push(@domains,&host_domain($id));
7420: }
7421: }
7422: return @domains;
7423: }
7424:
7425: sub current_machine_ids {
7426: my $hostname=&hostname($perlvar{'lonHostID'});
7427: my @ids;
7428: my %hostname = &all_hostnames();
7429: while( my($id, $name) = each(%hostname)) {
7430: # &logthis("-$id-$name-$hostname-");
7431: if ($hostname eq $name) {
7432: push(@ids,$id);
7433: }
7434: }
7435: return @ids;
7436: }
7437:
7438: sub additional_machine_domains {
7439: my @domains;
7440: open(my $fh,"<$perlvar{'lonTabDir'}/expected_domains.tab");
7441: while( my $line = <$fh>) {
7442: $line =~ s/\s//g;
7443: push(@domains,$line);
7444: }
7445: return @domains;
7446: }
7447:
7448: sub default_login_domain {
7449: my $domain = $perlvar{'lonDefDomain'};
7450: my $testdomain=(split(/\./,$ENV{'HTTP_HOST'}))[0];
7451: foreach my $posdom (¤t_machine_domains(),
7452: &additional_machine_domains()) {
7453: if (lc($posdom) eq lc($testdomain)) {
7454: $domain=$posdom;
7455: last;
7456: }
7457: }
7458: return $domain;
7459: }
7460:
7461: # ------------------------------------------------------------- Declutters URLs
7462:
7463: sub declutter {
7464: my $thisfn=shift;
7465: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
7466: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7467: $thisfn=~s/^\///;
7468: $thisfn=~s|^adm/wrapper/||;
7469: $thisfn=~s|^adm/coursedocs/showdoc/||;
7470: $thisfn=~s/^res\///;
7471: $thisfn=~s/\?.+$//;
7472: return $thisfn;
7473: }
7474:
7475: # ------------------------------------------------------------- Clutter up URLs
7476:
7477: sub clutter {
7478: my $thisfn='/'.&declutter(shift);
7479: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
7480: $thisfn='/res'.$thisfn;
7481: }
7482: if ($thisfn !~m|/adm|) {
7483: if ($thisfn =~ m|/ext/|) {
7484: $thisfn='/adm/wrapper'.$thisfn;
7485: } else {
7486: my ($ext) = ($thisfn =~ /\.(\w+)$/);
7487: my $embstyle=&Apache::loncommon::fileembstyle($ext);
7488: if ($embstyle eq 'ssi'
7489: || ($embstyle eq 'hdn')
7490: || ($embstyle eq 'rat')
7491: || ($embstyle eq 'prv')
7492: || ($embstyle eq 'ign')) {
7493: #do nothing with these
7494: } elsif (($embstyle eq 'img')
7495: || ($embstyle eq 'emb')
7496: || ($embstyle eq 'wrp')) {
7497: $thisfn='/adm/wrapper'.$thisfn;
7498: } elsif ($embstyle eq 'unk'
7499: && $thisfn!~/\.(sequence|page)$/) {
7500: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
7501: } else {
7502: # &logthis("Got a blank emb style");
7503: }
7504: }
7505: }
7506: return $thisfn;
7507: }
7508:
7509: sub clutter_with_no_wrapper {
7510: my $uri = &clutter(shift);
7511: if ($uri =~ m-^/adm/-) {
7512: $uri =~ s-^/adm/wrapper/-/-;
7513: $uri =~ s-^/adm/coursedocs/showdoc/-/-;
7514: }
7515: return $uri;
7516: }
7517:
7518: sub freeze_escape {
7519: my ($value)=@_;
7520: if (ref($value)) {
7521: $value=&nfreeze($value);
7522: return '__FROZEN__'.&escape($value);
7523: }
7524: return &escape($value);
7525: }
7526:
7527:
7528: sub thaw_unescape {
7529: my ($value)=@_;
7530: if ($value =~ /^__FROZEN__/) {
7531: substr($value,0,10,undef);
7532: $value=&unescape($value);
7533: return &thaw($value);
7534: }
7535: return &unescape($value);
7536: }
7537:
7538: sub correct_line_ends {
7539: my ($result)=@_;
7540: $$result =~s/\r\n/\n/mg;
7541: $$result =~s/\r/\n/mg;
7542: }
7543: # ================================================================ Main Program
7544:
7545: sub goodbye {
7546: &logthis("Starting Shut down");
7547: #not converted to using infrastruture and probably shouldn't be
7548: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
7549: #converted
7550: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
7551: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
7552: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
7553: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
7554: #1.1 only
7555: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
7556: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
7557: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
7558: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
7559: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
7560: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
7561: &logthis(sprintf("%-20s is %s",'hits',$hits));
7562: &flushcourselogs();
7563: &logthis("Shutting down");
7564: }
7565:
7566: BEGIN {
7567: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
7568: unless ($readit) {
7569: {
7570: my $configvars = LONCAPA::Configuration::read_conf('loncapa.conf');
7571: %perlvar = (%perlvar,%{$configvars});
7572: }
7573:
7574: # ------------------------------------------------------------ Read domain file
7575: {
7576: my %domain;
7577:
7578: my $fh;
7579: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
7580: while (my $line = <$fh>) {
7581: next if ($line =~ /^(\#|\s*$ )/);
7582:
7583: chomp($line);
7584: my ($name,@elements) = split(/:/,$line,9);
7585: my %this_domain;
7586: foreach my $field ('description', 'auth_def', 'auth_arg_def',
7587: 'lang_def', 'city', 'longi', 'lati',
7588: 'primary') {
7589: $this_domain{$field} = shift(@elements);
7590: }
7591: $domain{$name} = \%this_domain;
7592: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
7593: }
7594: }
7595: close ($fh);
7596:
7597: sub domain {
7598: my ($name,$what) = @_;
7599: return if ( !exists($domain{$name}) );
7600:
7601: if (!$what) {
7602: return $domain{$name}{'description'};
7603: }
7604: return $domain{$name}{$what};
7605: }
7606: }
7607:
7608:
7609: # ------------------------------------------------------------- Read hosts file
7610: {
7611: my %hostname;
7612: my %hostdom;
7613: my %libserv;
7614: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
7615:
7616: while (my $configline=<$config>) {
7617: next if ($configline =~ /^(\#|\s*$)/);
7618: chomp($configline);
7619: my ($id,$domain,$role,$name)=split(/:/,$configline);
7620: $name=~s/\s//g;
7621: if ($id && $domain && $role && $name) {
7622: $hostname{$id}=$name;
7623: $hostdom{$id}=$domain;
7624: if ($role eq 'library') { $libserv{$id}=$name; }
7625: }
7626: }
7627: close($config);
7628: # FIXME: dev server don't want this, production servers _do_ want this
7629: #&get_iphost();
7630:
7631: sub hostname {
7632: my ($lonid) = @_;
7633: return $hostname{$lonid};
7634: }
7635:
7636: sub all_hostnames {
7637: return %hostname;
7638: }
7639:
7640: sub is_library {
7641: return exists($libserv{$_[0]});
7642: }
7643:
7644: sub all_library {
7645: return %libserv;
7646: }
7647:
7648: sub get_servers {
7649: my ($domain,$type) = @_;
7650: my %possible_hosts = ($type eq 'library') ? %libserv
7651: : %hostname;
7652: my %result;
7653: if (ref($domain) eq 'ARRAY') {
7654: while ( my ($host,$hostname) = each(%possible_hosts)) {
7655: if (grep(/^\Q$hostdom{$host}\E$/,@$domain)) {
7656: $result{$host} = $hostname;
7657: }
7658: }
7659: } else {
7660: while ( my ($host,$hostname) = each(%possible_hosts)) {
7661: if ($hostdom{$host} eq $domain) {
7662: $result{$host} = $hostname;
7663: }
7664: }
7665: }
7666: return %result;
7667: }
7668:
7669: sub host_domain {
7670: my ($lonid) = @_;
7671: return $hostdom{$lonid};
7672: }
7673:
7674: sub all_domains {
7675: my %seen;
7676: my @uniq = grep(!$seen{$_}++, values(%hostdom));
7677: return @uniq;
7678: }
7679: }
7680:
7681: {
7682: my %iphost;
7683: sub get_hosts_from_ip {
7684: my ($ip) = @_;
7685: my %iphosts = &get_iphost();
7686: if (ref($iphosts{$ip})) {
7687: return @{$iphosts{$ip}};
7688: }
7689: return;
7690: }
7691:
7692: sub get_iphost {
7693: if (%iphost) { return %iphost; }
7694: my %name_to_ip;
7695: my %hostname = &all_hostnames();
7696: foreach my $id (keys(%hostname)) {
7697: my $name=$hostname{$id};
7698: my $ip;
7699: if (!exists($name_to_ip{$name})) {
7700: $ip = gethostbyname($name);
7701: if (!$ip || length($ip) ne 4) {
7702: &logthis("Skipping host $id name $name no IP found");
7703: next;
7704: }
7705: $ip=inet_ntoa($ip);
7706: $name_to_ip{$name} = $ip;
7707: } else {
7708: $ip = $name_to_ip{$name};
7709: }
7710: push(@{$iphost{$ip}},$id);
7711: }
7712: return %iphost;
7713: }
7714: }
7715:
7716: # ------------------------------------------------------ Read spare server file
7717: {
7718: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
7719:
7720: while (my $configline=<$config>) {
7721: chomp($configline);
7722: if ($configline) {
7723: my ($host,$type) = split(':',$configline,2);
7724: if (!defined($type) || $type eq '') { $type = 'default' };
7725: push(@{ $spareid{$type} }, $host);
7726: }
7727: }
7728: close($config);
7729: }
7730: # ------------------------------------------------------------ Read permissions
7731: {
7732: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
7733:
7734: while (my $configline=<$config>) {
7735: chomp($configline);
7736: if ($configline) {
7737: my ($role,$perm)=split(/ /,$configline);
7738: if ($perm ne '') { $pr{$role}=$perm; }
7739: }
7740: }
7741: close($config);
7742: }
7743:
7744: # -------------------------------------------- Read plain texts for permissions
7745: {
7746: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
7747:
7748: while (my $configline=<$config>) {
7749: chomp($configline);
7750: if ($configline) {
7751: my ($short,@plain)=split(/:/,$configline);
7752: %{$prp{$short}} = ();
7753: if (@plain > 0) {
7754: $prp{$short}{'std'} = $plain[0];
7755: for (my $i=1; $i<@plain; $i++) {
7756: $prp{$short}{'alt'.$i} = $plain[$i];
7757: }
7758: }
7759: }
7760: }
7761: close($config);
7762: }
7763:
7764: # ---------------------------------------------------------- Read package table
7765: {
7766: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
7767:
7768: while (my $configline=<$config>) {
7769: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
7770: chomp($configline);
7771: my ($short,$plain)=split(/:/,$configline);
7772: my ($pack,$name)=split(/\&/,$short);
7773: if ($plain ne '') {
7774: $packagetab{$pack.'&'.$name.'&name'}=$name;
7775: $packagetab{$short}=$plain;
7776: }
7777: }
7778: close($config);
7779: }
7780:
7781: # ------------- set up temporary directory
7782: {
7783: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
7784:
7785: }
7786:
7787: $memcache=new Cache::Memcached({'servers' => ['127.0.0.1:11211'],
7788: 'compress_threshold'=> 20_000,
7789: });
7790:
7791: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
7792: $dumpcount=0;
7793:
7794: &logtouch();
7795: &logthis('<font color="yellow">INFO: Read configuration</font>');
7796: $readit=1;
7797: {
7798: use integer;
7799: my $test=(2**32)+1;
7800: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
7801: &logthis(" Detected 64bit platform ($_64bit)");
7802: }
7803: }
7804: }
7805:
7806: 1;
7807: __END__
7808:
7809: =pod
7810:
7811: =head1 NAME
7812:
7813: Apache::lonnet - Subroutines to ask questions about things in the network.
7814:
7815: =head1 SYNOPSIS
7816:
7817: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
7818:
7819: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
7820:
7821: Common parameters:
7822:
7823: =over 4
7824:
7825: =item *
7826:
7827: $uname : an internal username (if $cname expecting a course Id specifically)
7828:
7829: =item *
7830:
7831: $udom : a domain (if $cdom expecting a course's domain specifically)
7832:
7833: =item *
7834:
7835: $symb : a resource instance identifier
7836:
7837: =item *
7838:
7839: $namespace : the name of a .db file that contains the data needed or
7840: being set.
7841:
7842: =back
7843:
7844: =head1 OVERVIEW
7845:
7846: lonnet provides subroutines which interact with the
7847: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
7848: about classes, users, and resources.
7849:
7850: For many of these objects you can also use this to store data about
7851: them or modify them in various ways.
7852:
7853: =head2 Symbs
7854:
7855: To identify a specific instance of a resource, LON-CAPA uses symbols
7856: or "symbs"X<symb>. These identifiers are built from the URL of the
7857: map, the resource number of the resource in the map, and the URL of
7858: the resource itself. The latter is somewhat redundant, but might help
7859: if maps change.
7860:
7861: An example is
7862:
7863: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
7864:
7865: The respective map entry is
7866:
7867: <resource id="19" src="/res/msu/korte/tests/part12.problem"
7868: title="Problem 2">
7869: </resource>
7870:
7871: Symbs are used by the random number generator, as well as to store and
7872: restore data specific to a certain instance of for example a problem.
7873:
7874: =head2 Storing And Retrieving Data
7875:
7876: X<store()>X<cstore()>X<restore()>Three of the most important functions
7877: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
7878: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
7879: is is the non-critical message twin of cstore. These functions are for
7880: handlers to store a perl hash to a user's permanent data space in an
7881: easy manner, and to retrieve it again on another call. It is expected
7882: that a handler would use this once at the beginning to retrieve data,
7883: and then again once at the end to send only the new data back.
7884:
7885: The data is stored in the user's data directory on the user's
7886: homeserver under the ID of the course.
7887:
7888: The hash that is returned by restore will have all of the previous
7889: value for all of the elements of the hash.
7890:
7891: Example:
7892:
7893: #creating a hash
7894: my %hash;
7895: $hash{'foo'}='bar';
7896:
7897: #storing it
7898: &Apache::lonnet::cstore(\%hash);
7899:
7900: #changing a value
7901: $hash{'foo'}='notbar';
7902:
7903: #adding a new value
7904: $hash{'bar'}='foo';
7905: &Apache::lonnet::cstore(\%hash);
7906:
7907: #retrieving the hash
7908: my %history=&Apache::lonnet::restore();
7909:
7910: #print the hash
7911: foreach my $key (sort(keys(%history))) {
7912: print("\%history{$key} = $history{$key}");
7913: }
7914:
7915: Will print out:
7916:
7917: %history{1:foo} = bar
7918: %history{1:keys} = foo:timestamp
7919: %history{1:timestamp} = 990455579
7920: %history{2:bar} = foo
7921: %history{2:foo} = notbar
7922: %history{2:keys} = foo:bar:timestamp
7923: %history{2:timestamp} = 990455580
7924: %history{bar} = foo
7925: %history{foo} = notbar
7926: %history{timestamp} = 990455580
7927: %history{version} = 2
7928:
7929: Note that the special hash entries C<keys>, C<version> and
7930: C<timestamp> were added to the hash. C<version> will be equal to the
7931: total number of versions of the data that have been stored. The
7932: C<timestamp> attribute will be the UNIX time the hash was
7933: stored. C<keys> is available in every historical section to list which
7934: keys were added or changed at a specific historical revision of a
7935: hash.
7936:
7937: B<Warning>: do not store the hash that restore returns directly. This
7938: will cause a mess since it will restore the historical keys as if the
7939: were new keys. I.E. 1:foo will become 1:1:foo etc.
7940:
7941: Calling convention:
7942:
7943: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
7944: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
7945:
7946: For more detailed information, see lonnet specific documentation.
7947:
7948: =head1 RETURN MESSAGES
7949:
7950: =over 4
7951:
7952: =item * B<con_lost>: unable to contact remote host
7953:
7954: =item * B<con_delayed>: unable to contact remote host, message will be delivered
7955: when the connection is brought back up
7956:
7957: =item * B<con_failed>: unable to contact remote host and unable to save message
7958: for later delivery
7959:
7960: =item * B<error:>: an error a occured, a description of the error follows the :
7961:
7962: =item * B<no_such_host>: unable to fund a host associated with the user/domain
7963: that was requested
7964:
7965: =back
7966:
7967: =head1 PUBLIC SUBROUTINES
7968:
7969: =head2 Session Environment Functions
7970:
7971: =over 4
7972:
7973: =item *
7974: X<appenv()>
7975: B<appenv(%hash)>: the value of %hash is written to
7976: the user envirnoment file, and will be restored for each access this
7977: user makes during this session, also modifies the %env for the current
7978: process
7979:
7980: =item *
7981: X<delenv()>
7982: B<delenv($regexp)>: removes all items from the session
7983: environment file that matches the regular expression in $regexp. The
7984: values are also delted from the current processes %env.
7985:
7986: =item * get_env_multiple($name)
7987:
7988: gets $name from the %env hash, it seemlessly handles the cases where multiple
7989: values may be defined and end up as an array ref.
7990:
7991: returns an array of values
7992:
7993: =back
7994:
7995: =head2 User Information
7996:
7997: =over 4
7998:
7999: =item *
8000: X<queryauthenticate()>
8001: B<queryauthenticate($uname,$udom)>: try to determine user's current
8002: authentication scheme
8003:
8004: =item *
8005: X<authenticate()>
8006: B<authenticate($uname,$upass,$udom)>: try to
8007: authenticate user from domain's lib servers (first use the current
8008: one). C<$upass> should be the users password.
8009:
8010: =item *
8011: X<homeserver()>
8012: B<homeserver($uname,$udom)>: find the server which has
8013: the user's directory and files (there must be only one), this caches
8014: the answer, and also caches if there is a borken connection.
8015:
8016: =item *
8017: X<idget()>
8018: B<idget($udom,@ids)>: find the usernames behind a list of IDs
8019: (IDs are a unique resource in a domain, there must be only 1 ID per
8020: username, and only 1 username per ID in a specific domain) (returns
8021: hash: id=>name,id=>name)
8022:
8023: =item *
8024: X<idrget()>
8025: B<idrget($udom,@unames)>: find the IDs behind a list of
8026: usernames (returns hash: name=>id,name=>id)
8027:
8028: =item *
8029: X<idput()>
8030: B<idput($udom,%ids)>: store away a list of names and associated IDs
8031:
8032: =item *
8033: X<rolesinit()>
8034: B<rolesinit($udom,$username,$authhost)>: get user privileges
8035:
8036: =item *
8037: X<getsection()>
8038: B<getsection($udom,$uname,$cname)>: finds the section of student in the
8039: course $cname, return section name/number or '' for "not in course"
8040: and '-1' for "no section"
8041:
8042: =item *
8043: X<userenvironment()>
8044: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
8045: passed in @what from the requested user's environment, returns a hash
8046:
8047: =back
8048:
8049: =head2 User Roles
8050:
8051: =over 4
8052:
8053: =item *
8054:
8055: allowed($priv,$uri,$symb,$role) : check for a user privilege; returns codes for allowed actions
8056: F: full access
8057: U,I,K: authentication modes (cxx only)
8058: '': forbidden
8059: 1: user needs to choose course
8060: 2: browse allowed
8061: A: passphrase authentication needed
8062:
8063: =item *
8064:
8065: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
8066: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
8067: and course level
8068:
8069: =item *
8070:
8071: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
8072: explanation of a user role term
8073:
8074: =item *
8075:
8076: get_my_roles($uname,$udom,$types,$roles,$roledoms) : All arguments are
8077: optional. Returns a hash of a user's roles, with keys set to
8078: colon-sparated $uname,$udom,and $role, and value set to
8079: colon-separated start and end times for the role. If no username and
8080: domain are specified, will default to current user/domain. Types,
8081: roles, and roledoms are references to arrays, of role statuses
8082: (active, future or previous), roles (e.g., cc,in, st etc.) and domains
8083: of the roles which can be used to restrict the list if roles
8084: reported. If no array ref is provided for types, will default to
8085: return only active roles.
8086:
8087: =back
8088:
8089: =head2 User Modification
8090:
8091: =over 4
8092:
8093: =item *
8094:
8095: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
8096: user for the level given by URL. Optional start and end dates (leave empty
8097: string or zero for "no date")
8098:
8099: =item *
8100:
8101: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
8102: change a users, password, possible return values are: ok,
8103: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
8104: refused
8105:
8106: =item *
8107:
8108: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
8109:
8110: =item *
8111:
8112: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
8113: modify user
8114:
8115: =item *
8116:
8117: modifystudent
8118:
8119: modify a students enrollment and identification information.
8120: The course id is resolved based on the current users environment.
8121: This means the envoking user must be a course coordinator or otherwise
8122: associated with a course.
8123:
8124: This call is essentially a wrapper for lonnet::modifyuser and
8125: lonnet::modify_student_enrollment
8126:
8127: Inputs:
8128:
8129: =over 4
8130:
8131: =item B<$udom> Students loncapa domain
8132:
8133: =item B<$uname> Students loncapa login name
8134:
8135: =item B<$uid> Students id/student number
8136:
8137: =item B<$umode> Students authentication mode
8138:
8139: =item B<$upass> Students password
8140:
8141: =item B<$first> Students first name
8142:
8143: =item B<$middle> Students middle name
8144:
8145: =item B<$last> Students last name
8146:
8147: =item B<$gene> Students generation
8148:
8149: =item B<$usec> Students section in course
8150:
8151: =item B<$end> Unix time of the roles expiration
8152:
8153: =item B<$start> Unix time of the roles start date
8154:
8155: =item B<$forceid> If defined, allow $uid to be changed
8156:
8157: =item B<$desiredhome> server to use as home server for student
8158:
8159: =back
8160:
8161: =item *
8162:
8163: modify_student_enrollment
8164:
8165: Change a students enrollment status in a class. The environment variable
8166: 'role.request.course' must be defined for this function to proceed.
8167:
8168: Inputs:
8169:
8170: =over 4
8171:
8172: =item $udom, students domain
8173:
8174: =item $uname, students name
8175:
8176: =item $uid, students user id
8177:
8178: =item $first, students first name
8179:
8180: =item $middle
8181:
8182: =item $last
8183:
8184: =item $gene
8185:
8186: =item $usec
8187:
8188: =item $end
8189:
8190: =item $start
8191:
8192: =back
8193:
8194:
8195: =item *
8196:
8197: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
8198: custom role; give a custom role to a user for the level given by URL. Specify
8199: name and domain of role author, and role name
8200:
8201: =item *
8202:
8203: revokerole($udom,$uname,$url,$role) : revoke a role for url
8204:
8205: =item *
8206:
8207: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
8208:
8209: =back
8210:
8211: =head2 Course Infomation
8212:
8213: =over 4
8214:
8215: =item *
8216:
8217: coursedescription($courseid) : returns a hash of information about the
8218: specified course id, including all environment settings for the
8219: course, the description of the course will be in the hash under the
8220: key 'description'
8221:
8222: =item *
8223:
8224: resdata($name,$domain,$type,@which) : request for current parameter
8225: setting for a specific $type, where $type is either 'course' or 'user',
8226: @what should be a list of parameters to ask about. This routine caches
8227: answers for 5 minutes.
8228:
8229: =back
8230:
8231: =head2 Course Modification
8232:
8233: =over 4
8234:
8235: =item *
8236:
8237: writecoursepref($courseid,%prefs) : write preferences (environment
8238: database) for a course
8239:
8240: =item *
8241:
8242: createcourse($udom,$description,$url) : make/modify course
8243:
8244: =back
8245:
8246: =head2 Resource Subroutines
8247:
8248: =over 4
8249:
8250: =item *
8251:
8252: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
8253:
8254: =item *
8255:
8256: repcopy($filename) : subscribes to the requested file, and attempts to
8257: replicate from the owning library server, Might return
8258: 'unavailable', 'not_found', 'forbidden', 'ok', or
8259: 'bad_request', also attempts to grab the metadata for the
8260: resource. Expects the local filesystem pathname
8261: (/home/httpd/html/res/....)
8262:
8263: =back
8264:
8265: =head2 Resource Information
8266:
8267: =over 4
8268:
8269: =item *
8270:
8271: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
8272: a vairety of different possible values, $varname should be a request
8273: string, and the other parameters can be used to specify who and what
8274: one is asking about.
8275:
8276: Possible values for $varname are environment.lastname (or other item
8277: from the envirnment hash), user.name (or someother aspect about the
8278: user), resource.0.maxtries (or some other part and parameter of a
8279: resource)
8280:
8281: =item *
8282:
8283: directcondval($number) : get current value of a condition; reads from a state
8284: string
8285:
8286: =item *
8287:
8288: condval($condidx) : value of condition index based on state
8289:
8290: =item *
8291:
8292: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
8293: resource's metadata, $what should be either a specific key, or either
8294: 'keys' (to get a list of possible keys) or 'packages' to get a list of
8295: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
8296:
8297: this function automatically caches all requests
8298:
8299: =item *
8300:
8301: metadata_query($query,$custom,$customshow) : make a metadata query against the
8302: network of library servers; returns file handle of where SQL and regex results
8303: will be stored for query
8304:
8305: =item *
8306:
8307: symbread($filename) : return symbolic list entry (filename argument optional);
8308: returns the data handle
8309:
8310: =item *
8311:
8312: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
8313: a possible symb for the URL in $thisfn, and if is an encryypted
8314: resource that the user accessed using /enc/ returns a 1 on success, 0
8315: on failure, user must be in a course, as it assumes the existance of
8316: the course initial hash, and uses $env('request.course.id'}
8317:
8318:
8319: =item *
8320:
8321: symbclean($symb) : removes versions numbers from a symb, returns the
8322: cleaned symb
8323:
8324: =item *
8325:
8326: is_on_map($uri) : checks if the $uri is somewhere on the current
8327: course map, user must be in a course for it to work.
8328:
8329: =item *
8330:
8331: numval($salt) : return random seed value (addend for rndseed)
8332:
8333: =item *
8334:
8335: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
8336: a random seed, all arguments are optional, if they aren't sent it uses the
8337: environment to derive them. Note: if symb isn't sent and it can't get one
8338: from &symbread it will use the current time as its return value
8339:
8340: =item *
8341:
8342: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
8343: unfakeable, receipt
8344:
8345: =item *
8346:
8347: receipt() : API to ireceipt working off of env values; given out to users
8348:
8349: =item *
8350:
8351: countacc($url) : count the number of accesses to a given URL
8352:
8353: =item *
8354:
8355: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
8356:
8357: =item *
8358:
8359: checkin($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 $tcrsid)
8360:
8361: =item *
8362:
8363: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
8364:
8365: =item *
8366:
8367: devalidate($symb) : devalidate temporary spreadsheet calculations,
8368: forcing spreadsheet to reevaluate the resource scores next time.
8369:
8370: =back
8371:
8372: =head2 Storing/Retreiving Data
8373:
8374: =over 4
8375:
8376: =item *
8377:
8378: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
8379: for this url; hashref needs to be given and should be a \%hashname; the
8380: remaining args aren't required and if they aren't passed or are '' they will
8381: be derived from the env
8382:
8383: =item *
8384:
8385: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
8386: uses critical subroutine
8387:
8388: =item *
8389:
8390: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
8391: all args are optional
8392:
8393: =item *
8394:
8395: dumpstore($namespace,$udom,$uname,$regexp,$range) :
8396: dumps the complete (or key matching regexp) namespace into a hash
8397: ($udom, $uname, $regexp, $range are optional) for a namespace that is
8398: normally &store()ed into
8399:
8400: $range should be either an integer '100' (give me the first 100
8401: matching records)
8402: or be two integers sperated by a - with no spaces
8403: '30-50' (give me the 30th through the 50th matching
8404: records)
8405:
8406:
8407: =item *
8408:
8409: putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
8410: replaces a &store() version of data with a replacement set of data
8411: for a particular resource in a namespace passed in the $storehash hash
8412: reference
8413:
8414: =item *
8415:
8416: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
8417: works very similar to store/cstore, but all data is stored in a
8418: temporary location and can be reset using tmpreset, $storehash should
8419: be a hash reference, returns nothing on success
8420:
8421: =item *
8422:
8423: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
8424: similar to restore, but all data is stored in a temporary location and
8425: can be reset using tmpreset. Returns a hash of values on success,
8426: error string otherwise.
8427:
8428: =item *
8429:
8430: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
8431: deltes all keys for $symb form the temporary storage hash.
8432:
8433: =item *
8434:
8435: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
8436: reference filled in from namesp ($udom and $uname are optional)
8437:
8438: =item *
8439:
8440: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
8441: namesp ($udom and $uname are optional)
8442:
8443: =item *
8444:
8445: dump($namespace,$udom,$uname,$regexp,$range) :
8446: dumps the complete (or key matching regexp) namespace into a hash
8447: ($udom, $uname, $regexp, $range are optional)
8448:
8449: $range should be either an integer '100' (give me the first 100
8450: matching records)
8451: or be two integers sperated by a - with no spaces
8452: '30-50' (give me the 30th through the 50th matching
8453: records)
8454: =item *
8455:
8456: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
8457: $store can be a scalar, an array reference, or if the amount to be
8458: incremented is > 1, a hash reference.
8459:
8460: ($udom and $uname are optional)
8461:
8462: =item *
8463:
8464: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
8465: ($udom and $uname are optional)
8466:
8467: =item *
8468:
8469: cput($namespace,$storehash,$udom,$uname) : critical put
8470: ($udom and $uname are optional)
8471:
8472: =item *
8473:
8474: newput($namespace,$storehash,$udom,$uname) :
8475:
8476: Attempts to store the items in the $storehash, but only if they don't
8477: currently exist, if this succeeds you can be certain that you have
8478: successfully created a new key value pair in the $namespace db.
8479:
8480:
8481: Args:
8482: $namespace: name of database to store values to
8483: $storehash: hashref to store to the db
8484: $udom: (optional) domain of user containing the db
8485: $uname: (optional) name of user caontaining the db
8486:
8487: Returns:
8488: 'ok' -> succeeded in storing all keys of $storehash
8489: 'key_exists: <key>' -> failed to anything out of $storehash, as at
8490: least <key> already existed in the db (other
8491: requested keys may also already exist)
8492: 'error: <msg>' -> unable to tie the DB or other erorr occured
8493: 'con_lost' -> unable to contact request server
8494: 'refused' -> action was not allowed by remote machine
8495:
8496:
8497: =item *
8498:
8499: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
8500: reference filled in from namesp (encrypts the return communication)
8501: ($udom and $uname are optional)
8502:
8503: =item *
8504:
8505: log($udom,$name,$home,$message) : write to permanent log for user; use
8506: critical subroutine
8507:
8508: =item *
8509:
8510: get_dom($namespace,$storearr,$udomain) : returns hash with keys from array
8511: reference filled in from namespace found in domain level on primary domain server ($udomain is optional)
8512:
8513: =item *
8514:
8515: put_dom($namespace,$storehash,$udomain) : stores hash in namespace at domain level on primary domain server ($udomain is optional)
8516:
8517: =back
8518:
8519: =head2 Network Status Functions
8520:
8521: =over 4
8522:
8523: =item *
8524:
8525: dirlist($uri) : return directory list based on URI
8526:
8527: =item *
8528:
8529: spareserver() : find server with least workload from spare.tab
8530:
8531: =back
8532:
8533: =head2 Apache Request
8534:
8535: =over 4
8536:
8537: =item *
8538:
8539: ssi($url,%hash) : server side include, does a complete request cycle on url to
8540: localhost, posts hash
8541:
8542: =back
8543:
8544: =head2 Data to String to Data
8545:
8546: =over 4
8547:
8548: =item *
8549:
8550: hash2str(%hash) : convert a hash into a string complete with escaping and '='
8551: and '&' separators, supports elements that are arrayrefs and hashrefs
8552:
8553: =item *
8554:
8555: hashref2str($hashref) : convert a hashref into a string complete with
8556: escaping and '=' and '&' separators, supports elements that are
8557: arrayrefs and hashrefs
8558:
8559: =item *
8560:
8561: arrayref2str($arrayref) : convert an arrayref into a string complete
8562: with escaping and '&' separators, supports elements that are arrayrefs
8563: and hashrefs
8564:
8565: =item *
8566:
8567: str2hash($string) : convert string to hash using unescaping and
8568: splitting on '=' and '&', supports elements that are arrayrefs and
8569: hashrefs
8570:
8571: =item *
8572:
8573: str2array($string) : convert string to hash using unescaping and
8574: splitting on '&', supports elements that are arrayrefs and hashrefs
8575:
8576: =back
8577:
8578: =head2 Logging Routines
8579:
8580: =over 4
8581:
8582: These routines allow one to make log messages in the lonnet.log and
8583: lonnet.perm logfiles.
8584:
8585: =item *
8586:
8587: logtouch() : make sure the logfile, lonnet.log, exists
8588:
8589: =item *
8590:
8591: logthis() : append message to the normal lonnet.log file, it gets
8592: preiodically rolled over and deleted.
8593:
8594: =item *
8595:
8596: logperm() : append a permanent message to lonnet.perm.log, this log
8597: file never gets deleted by any automated portion of the system, only
8598: messages of critical importance should go in here.
8599:
8600: =back
8601:
8602: =head2 General File Helper Routines
8603:
8604: =over 4
8605:
8606: =item *
8607:
8608: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
8609: (a) files in /uploaded
8610: (i) If a local copy of the file exists -
8611: compares modification date of local copy with last-modified date for
8612: definitive version stored on home server for course. If local copy is
8613: stale, requests a new version from the home server and stores it.
8614: If the original has been removed from the home server, then local copy
8615: is unlinked.
8616: (ii) If local copy does not exist -
8617: requests the file from the home server and stores it.
8618:
8619: If $caller is 'uploadrep':
8620: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
8621: for request for files originally uploaded via DOCS.
8622: - returns 'ok' if fresh local copy now available, -1 otherwise.
8623:
8624: Otherwise:
8625: This indicates a call from the content generation phase of the request.
8626: - returns the entire contents of the file or -1.
8627:
8628: (b) files in /res
8629: - returns the entire contents of a file or -1;
8630: it properly subscribes to and replicates the file if neccessary.
8631:
8632:
8633: =item *
8634:
8635: stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
8636: reference
8637:
8638: returns either a stat() list of data about the file or an empty list
8639: if the file doesn't exist or couldn't find out about it (connection
8640: problems or user unknown)
8641:
8642: =item *
8643:
8644: filelocation($dir,$file) : returns file system location of a file
8645: based on URI; meant to be "fairly clean" absolute reference, $dir is a
8646: directory that relative $file lookups are to looked in ($dir of /a/dir
8647: and a file of ../bob will become /a/bob)
8648:
8649: =item *
8650:
8651: hreflocation($dir,$file) : returns file system location or a URL; same as
8652: filelocation except for hrefs
8653:
8654: =item *
8655:
8656: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
8657:
8658: =back
8659:
8660: =head2 Usererfile file routines (/uploaded*)
8661:
8662: =over 4
8663:
8664: =item *
8665:
8666: userfileupload(): main rotine for putting a file in a user or course's
8667: filespace, arguments are,
8668:
8669: formname - required - this is the name of the element in $env where the
8670: filename, and the contents of the file to create/modifed exist
8671: the filename is in $env{'form.'.$formname.'.filename'} and the
8672: contents of the file is located in $env{'form.'.$formname}
8673: coursedoc - if true, store the file in the course of the active role
8674: of the current user
8675: subdir - required - subdirectory to put the file in under ../userfiles/
8676: if undefined, it will be placed in "unknown"
8677:
8678: (This routine calls clean_filename() to remove any dangerous
8679: characters from the filename, and then calls finuserfileupload() to
8680: complete the transaction)
8681:
8682: returns either the url of the uploaded file (/uploaded/....) if successful
8683: and /adm/notfound.html if unsuccessful
8684:
8685: =item *
8686:
8687: clean_filename(): routine for cleaing a filename up for storage in
8688: userfile space, argument is:
8689:
8690: filename - proposed filename
8691:
8692: returns: the new clean filename
8693:
8694: =item *
8695:
8696: finishuserfileupload(): routine that creaes and sends the file to
8697: userspace, probably shouldn't be called directly
8698:
8699: docuname: username or courseid of destination for the file
8700: docudom: domain of user/course of destination for the file
8701: formname: same as for userfileupload()
8702: fname: filename (inculding subdirectories) for the file
8703:
8704: returns either the url of the uploaded file (/uploaded/....) if successful
8705: and /adm/notfound.html if unsuccessful
8706:
8707: =item *
8708:
8709: renameuserfile(): renames an existing userfile to a new name
8710:
8711: Args:
8712: docuname: username or courseid of destination for the file
8713: docudom: domain of user/course of destination for the file
8714: old: current file name (including any subdirs under userfiles)
8715: new: desired file name (including any subdirs under userfiles)
8716:
8717: =item *
8718:
8719: mkdiruserfile(): creates a directory is a userfiles dir
8720:
8721: Args:
8722: docuname: username or courseid of destination for the file
8723: docudom: domain of user/course of destination for the file
8724: dir: dir to create (including any subdirs under userfiles)
8725:
8726: =item *
8727:
8728: removeuserfile(): removes a file that exists in userfiles
8729:
8730: Args:
8731: docuname: username or courseid of destination for the file
8732: docudom: domain of user/course of destination for the file
8733: fname: filname to delete (including any subdirs under userfiles)
8734:
8735: =item *
8736:
8737: removeuploadedurl(): convience function for removeuserfile()
8738:
8739: Args:
8740: url: a full /uploaded/... url to delete
8741:
8742: =item *
8743:
8744: get_portfile_permissions():
8745: Args:
8746: domain: domain of user or course contain the portfolio files
8747: user: name of user or num of course contain the portfolio files
8748: Returns:
8749: hashref of a dump of the proper file_permissions.db
8750:
8751:
8752: =item *
8753:
8754: get_access_controls():
8755:
8756: Args:
8757: current_permissions: the hash ref returned from get_portfile_permissions()
8758: group: (optional) the group you want the files associated with
8759: file: (optional) the file you want access info on
8760:
8761: Returns:
8762: a hash (keys are file names) of hashes containing
8763: keys are: path to file/file_name\0uniqueID:scope_end_start (see below)
8764: values are XML containing access control settings (see below)
8765:
8766: Internal notes:
8767:
8768: access controls are stored in file_permissions.db as key=value pairs.
8769: key -> path to file/file_name\0uniqueID:scope_end_start
8770: where scope -> public,guest,course,group,domains or users.
8771: end -> UNIX time for end of access (0 -> no end date)
8772: start -> UNIX time for start of access
8773:
8774: value -> XML description of access control
8775: <scope type=""> (type =1 of: public,guest,course,group,domains,users">
8776: <start></start>
8777: <end></end>
8778:
8779: <password></password> for scope type = guest
8780:
8781: <domain></domain> for scope type = course or group
8782: <number></number>
8783: <roles id="">
8784: <role></role>
8785: <access></access>
8786: <section></section>
8787: <group></group>
8788: </roles>
8789:
8790: <dom></dom> for scope type = domains
8791:
8792: <users> for scope type = users
8793: <user>
8794: <uname></uname>
8795: <udom></udom>
8796: </user>
8797: </users>
8798: </scope>
8799:
8800: Access data is also aggregated for each file in an additional key=value pair:
8801: key -> path to file/file_name\0accesscontrol
8802: value -> reference to hash
8803: hash contains key = value pairs
8804: where key = uniqueID:scope_end_start
8805: value = UNIX time record was last updated
8806:
8807: Used to improve speed of look-ups of access controls for each file.
8808:
8809: Locks on files (resulting from submission of portfolio file to a homework problem stored in array of arrays.
8810:
8811: modify_access_controls():
8812:
8813: Modifies access controls for a portfolio file
8814: Args
8815: 1. file name
8816: 2. reference to hash of required changes,
8817: 3. domain
8818: 4. username
8819: where domain,username are the domain of the portfolio owner
8820: (either a user or a course)
8821:
8822: Returns:
8823: 1. result of additions or updates ('ok' or 'error', with error message).
8824: 2. result of deletions ('ok' or 'error', with error message).
8825: 3. reference to hash of any new or updated access controls.
8826: 4. reference to hash used to map incoming IDs to uniqueIDs assigned to control.
8827: key = integer (inbound ID)
8828: value = uniqueID
8829:
8830: =back
8831:
8832: =head2 HTTP Helper Routines
8833:
8834: =over 4
8835:
8836: =item *
8837:
8838: escape() : unpack non-word characters into CGI-compatible hex codes
8839:
8840: =item *
8841:
8842: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
8843:
8844: =back
8845:
8846: =head1 PRIVATE SUBROUTINES
8847:
8848: =head2 Underlying communication routines (Shouldn't call)
8849:
8850: =over 4
8851:
8852: =item *
8853:
8854: subreply() : tries to pass a message to lonc, returns con_lost if incapable
8855:
8856: =item *
8857:
8858: reply() : uses subreply to send a message to remote machine, logs all failures
8859:
8860: =item *
8861:
8862: critical() : passes a critical message to another server; if cannot
8863: get through then place message in connection buffer directory and
8864: returns con_delayed, if incapable of saving message, returns
8865: con_failed
8866:
8867: =item *
8868:
8869: reconlonc() : tries to reconnect lonc client processes.
8870:
8871: =back
8872:
8873: =head2 Resource Access Logging
8874:
8875: =over 4
8876:
8877: =item *
8878:
8879: flushcourselogs() : flush (save) buffer logs and access logs
8880:
8881: =item *
8882:
8883: courselog($what) : save message for course in hash
8884:
8885: =item *
8886:
8887: courseacclog($what) : save message for course using &courselog(). Perform
8888: special processing for specific resource types (problems, exams, quizzes, etc).
8889:
8890: =item *
8891:
8892: goodbye() : flush course logs and log shutting down; it is called in srm.conf
8893: as a PerlChildExitHandler
8894:
8895: =back
8896:
8897: =head2 Other
8898:
8899: =over 4
8900:
8901: =item *
8902:
8903: symblist($mapname,%newhash) : update symbolic storage links
8904:
8905: =back
8906:
8907: =cut
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