1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.845 2007/03/08 01:54:50 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonnet;
31:
32: use strict;
33: use LWP::UserAgent();
34: use HTTP::Headers;
35: use HTTP::Date;
36: # use Date::Parse;
37: use vars
38: qw(%perlvar %badServerCache %iphost %spareid
39: %pr %prp $memcache %packagetab
40: %courselogs %accesshash %userrolehash %domainrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf %coursetypebuf
42: %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati %domain_primary
44: $tmpdir $_64bit %env);
45:
46: use IO::Socket;
47: use GDBM_File;
48: use HTML::LCParser;
49: use HTML::Parser;
50: use Fcntl qw(:flock);
51: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
52: use Time::HiRes qw( gettimeofday tv_interval );
53: use Cache::Memcached;
54: use Digest::MD5;
55: use Math::Random;
56: use LONCAPA qw(:DEFAULT :match);
57: use LONCAPA::Configuration;
58:
59: my $readit;
60: my $max_connection_retries = 10; # Or some such value.
61:
62: require Exporter;
63:
64: our @ISA = qw (Exporter);
65: our @EXPORT = qw(%env);
66:
67: =pod
68:
69: =head1 Package Variables
70:
71: These are largely undocumented, so if you decipher one please note it here.
72:
73: =over 4
74:
75: =item $processmarker
76:
77: Contains the time this process was started and this servers host id.
78:
79: =item $dumpcount
80:
81: Counts the number of times a message log flush has been attempted (regardless
82: of success) by this process. Used as part of the filename when messages are
83: delayed.
84:
85: =back
86:
87: =cut
88:
89:
90: # --------------------------------------------------------------------- Logging
91: {
92: my $logid;
93: sub instructor_log {
94: my ($hash_name,$storehash,$delflag,$uname,$udom)=@_;
95: $logid++;
96: my $id=time().'00000'.$$.'00000'.$logid;
97: return &Apache::lonnet::put('nohist_'.$hash_name,
98: { $id => {
99: 'exe_uname' => $env{'user.name'},
100: 'exe_udom' => $env{'user.domain'},
101: 'exe_time' => time(),
102: 'exe_ip' => $ENV{'REMOTE_ADDR'},
103: 'delflag' => $delflag,
104: 'logentry' => $storehash,
105: 'uname' => $uname,
106: 'udom' => $udom,
107: }
108: },
109: $env{'course.'.$env{'request.course.id'}.'.domain'},
110: $env{'course.'.$env{'request.course.id'}.'.num'}
111: );
112: }
113: }
114:
115: sub logtouch {
116: my $execdir=$perlvar{'lonDaemons'};
117: unless (-e "$execdir/logs/lonnet.log") {
118: open(my $fh,">>$execdir/logs/lonnet.log");
119: close $fh;
120: }
121: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
122: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
123: }
124:
125: sub logthis {
126: my $message=shift;
127: my $execdir=$perlvar{'lonDaemons'};
128: my $now=time;
129: my $local=localtime($now);
130: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
131: print $fh "$local ($$): $message\n";
132: close($fh);
133: }
134: return 1;
135: }
136:
137: sub logperm {
138: my $message=shift;
139: my $execdir=$perlvar{'lonDaemons'};
140: my $now=time;
141: my $local=localtime($now);
142: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
143: print $fh "$now:$message:$local\n";
144: close($fh);
145: }
146: return 1;
147: }
148:
149: # -------------------------------------------------- Non-critical communication
150: sub subreply {
151: my ($cmd,$server)=@_;
152: my $peerfile="$perlvar{'lonSockDir'}/".&hostname($server);
153: #
154: # With loncnew process trimming, there's a timing hole between lonc server
155: # process exit and the master server picking up the listen on the AF_UNIX
156: # socket. In that time interval, a lock file will exist:
157:
158: my $lockfile=$peerfile.".lock";
159: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
160: sleep(1);
161: }
162: # At this point, either a loncnew parent is listening or an old lonc
163: # or loncnew child is listening so we can connect or everything's dead.
164: #
165: # We'll give the connection a few tries before abandoning it. If
166: # connection is not possible, we'll con_lost back to the client.
167: #
168: my $client;
169: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
170: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
171: Type => SOCK_STREAM,
172: Timeout => 10);
173: if($client) {
174: last; # Connected!
175: }
176: sleep(1); # Try again later if failed connection.
177: }
178: my $answer;
179: if ($client) {
180: print $client "sethost:$server:$cmd\n";
181: $answer=<$client>;
182: if (!$answer) { $answer="con_lost"; }
183: chomp($answer);
184: } else {
185: $answer = 'con_lost'; # Failed connection.
186: }
187: return $answer;
188: }
189:
190: sub reply {
191: my ($cmd,$server)=@_;
192: unless (defined(&hostname($server))) { return 'no_such_host'; }
193: my $answer=subreply($cmd,$server);
194: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
195: &logthis("<font color=\"blue\">WARNING:".
196: " $cmd to $server returned $answer</font>");
197: }
198: return $answer;
199: }
200:
201: # ----------------------------------------------------------- Send USR1 to lonc
202:
203: sub reconlonc {
204: &logthis("Trying to reconnect lonc");
205: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
206: if (open(my $fh,"<$loncfile")) {
207: my $loncpid=<$fh>;
208: chomp($loncpid);
209: if (kill 0 => $loncpid) {
210: &logthis("lonc at pid $loncpid responding, sending USR1");
211: kill USR1 => $loncpid;
212: sleep 1;
213: } else {
214: &logthis(
215: "<font color=\"blue\">WARNING:".
216: " lonc at pid $loncpid not responding, giving up</font>");
217: }
218: } else {
219: &logthis('<font color="blue">WARNING: lonc not running, giving up</font>');
220: }
221: }
222:
223: # ------------------------------------------------------ Critical communication
224:
225: sub critical {
226: my ($cmd,$server)=@_;
227: unless (&hostname($server)) {
228: &logthis("<font color=\"blue\">WARNING:".
229: " Critical message to unknown server ($server)</font>");
230: return 'no_such_host';
231: }
232: my $answer=reply($cmd,$server);
233: if ($answer eq 'con_lost') {
234: &reconlonc("$perlvar{'lonSockDir'}/$server");
235: my $answer=reply($cmd,$server);
236: if ($answer eq 'con_lost') {
237: my $now=time;
238: my $middlename=$cmd;
239: $middlename=substr($middlename,0,16);
240: $middlename=~s/\W//g;
241: my $dfilename=
242: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
243: $dumpcount++;
244: {
245: my $dfh;
246: if (open($dfh,">$dfilename")) {
247: print $dfh "$cmd\n";
248: close($dfh);
249: }
250: }
251: sleep 2;
252: my $wcmd='';
253: {
254: my $dfh;
255: if (open($dfh,"<$dfilename")) {
256: $wcmd=<$dfh>;
257: close($dfh);
258: }
259: }
260: chomp($wcmd);
261: if ($wcmd eq $cmd) {
262: &logthis("<font color=\"blue\">WARNING: ".
263: "Connection buffer $dfilename: $cmd</font>");
264: &logperm("D:$server:$cmd");
265: return 'con_delayed';
266: } else {
267: &logthis("<font color=\"red\">CRITICAL:"
268: ." Critical connection failed: $server $cmd</font>");
269: &logperm("F:$server:$cmd");
270: return 'con_failed';
271: }
272: }
273: }
274: return $answer;
275: }
276:
277: # ------------------------------------------- check if return value is an error
278:
279: sub error {
280: my ($result) = @_;
281: if ($result =~ /^(con_lost|no_such_host|error: (\d+) (.*))/) {
282: if ($2 == 2) { return undef; }
283: return $1;
284: }
285: return undef;
286: }
287:
288: sub convert_and_load_session_env {
289: my ($lonidsdir,$handle)=@_;
290: my @profile;
291: {
292: open(my $idf,"$lonidsdir/$handle.id");
293: flock($idf,LOCK_SH);
294: @profile=<$idf>;
295: close($idf);
296: }
297: my %temp_env;
298: foreach my $line (@profile) {
299: if ($line !~ m/=/) {
300: return 0;
301: }
302: chomp($line);
303: my ($envname,$envvalue)=split(/=/,$line,2);
304: $temp_env{&unescape($envname)} = &unescape($envvalue);
305: }
306: unlink("$lonidsdir/$handle.id");
307: if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",&GDBM_WRCREAT(),
308: 0640)) {
309: %disk_env = %temp_env;
310: @env{keys(%temp_env)} = @disk_env{keys(%temp_env)};
311: untie(%disk_env);
312: }
313: return 1;
314: }
315:
316: # ------------------------------------------- Transfer profile into environment
317: my $env_loaded;
318: sub transfer_profile_to_env {
319: my ($lonidsdir,$handle,$force_transfer) = @_;
320: if (!$force_transfer && $env_loaded) { return; }
321:
322: if (!defined($lonidsdir)) {
323: $lonidsdir = $perlvar{'lonIDsDir'};
324: }
325: if (!defined($handle)) {
326: ($handle) = ($env{'user.environment'} =~m|/([^/]+)\.id$| );
327: }
328:
329: my $convert;
330: {
331: open(my $idf,"$lonidsdir/$handle.id");
332: flock($idf,LOCK_SH);
333: if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",
334: &GDBM_READER(),0640)) {
335: @env{keys(%disk_env)} = @disk_env{keys(%disk_env)};
336: untie(%disk_env);
337: } else {
338: $convert = 1;
339: }
340: }
341: if ($convert) {
342: if (!&convert_and_load_session_env($lonidsdir,$handle)) {
343: &logthis("Failed to load session, or convert session.");
344: }
345: }
346:
347: my %remove;
348: while ( my $envname = each(%env) ) {
349: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
350: if ($time < time-300) {
351: $remove{$key}++;
352: }
353: }
354: }
355:
356: $env{'user.environment'} = "$lonidsdir/$handle.id";
357: $env_loaded=1;
358: foreach my $expired_key (keys(%remove)) {
359: &delenv($expired_key);
360: }
361: }
362:
363: sub timed_flock {
364: my ($file,$lock_type) = @_;
365: my $failed=0;
366: eval {
367: local $SIG{__DIE__}='DEFAULT';
368: local $SIG{ALRM}=sub {
369: $failed=1;
370: die("failed lock");
371: };
372: alarm(13);
373: flock($file,$lock_type);
374: alarm(0);
375: };
376: if ($failed) {
377: return undef;
378: } else {
379: return 1;
380: }
381: }
382:
383: # ---------------------------------------------------------- Append Environment
384:
385: sub appenv {
386: my %newenv=@_;
387: foreach my $key (keys(%newenv)) {
388: if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
389: &logthis("<font color=\"blue\">WARNING: ".
390: "Attempt to modify environment ".$key." to ".$newenv{$key}
391: .'</font>');
392: delete($newenv{$key});
393: } else {
394: $env{$key}=$newenv{$key};
395: }
396: }
397: open(my $env_file,$env{'user.environment'});
398: if (&timed_flock($env_file,LOCK_EX)
399: &&
400: tie(my %disk_env,'GDBM_File',$env{'user.environment'},
401: (&GDBM_WRITER()|&GDBM_NOLOCK()),0640)) {
402: while (my ($key,$value) = each(%newenv)) {
403: $disk_env{$key} = $value;
404: }
405: untie(%disk_env);
406: }
407: return 'ok';
408: }
409: # ----------------------------------------------------- Delete from Environment
410:
411: sub delenv {
412: my $delthis=shift;
413: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
414: &logthis("<font color=\"blue\">WARNING: ".
415: "Attempt to delete from environment ".$delthis);
416: return 'error';
417: }
418: open(my $env_file,$env{'user.environment'});
419: if (&timed_flock($env_file,LOCK_EX)
420: &&
421: tie(my %disk_env,'GDBM_File',$env{'user.environment'},
422: (&GDBM_WRITER()|&GDBM_NOLOCK()),0640)) {
423: foreach my $key (keys(%disk_env)) {
424: if ($key=~/^$delthis/) {
425: delete($env{$key});
426: delete($disk_env{$key});
427: }
428: }
429: untie(%disk_env);
430: }
431: return 'ok';
432: }
433:
434: sub get_env_multiple {
435: my ($name) = @_;
436: my @values;
437: if (defined($env{$name})) {
438: # exists is it an array
439: if (ref($env{$name})) {
440: @values=@{ $env{$name} };
441: } else {
442: $values[0]=$env{$name};
443: }
444: }
445: return(@values);
446: }
447:
448: # ------------------------------------------ Find out current server userload
449: # there is a copy in lond
450: sub userload {
451: my $numusers=0;
452: {
453: opendir(LONIDS,$perlvar{'lonIDsDir'});
454: my $filename;
455: my $curtime=time;
456: while ($filename=readdir(LONIDS)) {
457: if ($filename eq '.' || $filename eq '..') {next;}
458: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
459: if ($curtime-$mtime < 1800) { $numusers++; }
460: }
461: closedir(LONIDS);
462: }
463: my $userloadpercent=0;
464: my $maxuserload=$perlvar{'lonUserLoadLim'};
465: if ($maxuserload) {
466: $userloadpercent=100*$numusers/$maxuserload;
467: }
468: $userloadpercent=sprintf("%.2f",$userloadpercent);
469: return $userloadpercent;
470: }
471:
472: # ------------------------------------------ Fight off request when overloaded
473:
474: sub overloaderror {
475: my ($r,$checkserver)=@_;
476: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
477: my $loadavg;
478: if ($checkserver eq $perlvar{'lonHostID'}) {
479: open(my $loadfile,'/proc/loadavg');
480: $loadavg=<$loadfile>;
481: $loadavg =~ s/\s.*//g;
482: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
483: close($loadfile);
484: } else {
485: $loadavg=&reply('load',$checkserver);
486: }
487: my $overload=$loadavg-100;
488: if ($overload>0) {
489: $r->err_headers_out->{'Retry-After'}=$overload;
490: $r->log_error('Overload of '.$overload.' on '.$checkserver);
491: return 413;
492: }
493: return '';
494: }
495:
496: # ------------------------------ Find server with least workload from spare.tab
497:
498: sub spareserver {
499: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
500: my $spare_server;
501: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
502: my $lowest_load=($loadpercent > $userloadpercent) ? $loadpercent
503: : $userloadpercent;
504:
505: foreach my $try_server (@{ $spareid{'primary'} }) {
506: ($spare_server, $lowest_load) =
507: &compare_server_load($try_server, $spare_server, $lowest_load);
508: }
509:
510: my $found_server = ($spare_server ne '' && $lowest_load < 100);
511:
512: if (!$found_server) {
513: foreach my $try_server (@{ $spareid{'default'} }) {
514: ($spare_server, $lowest_load) =
515: &compare_server_load($try_server, $spare_server, $lowest_load);
516: }
517: }
518:
519: if (!$want_server_name) {
520: $spare_server="http://".&hostname($spare_server);
521: }
522: return $spare_server;
523: }
524:
525: sub compare_server_load {
526: my ($try_server, $spare_server, $lowest_load) = @_;
527:
528: my $loadans = &reply('load', $try_server);
529: my $userloadans = &reply('userload',$try_server);
530:
531: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
532: next; #didn't get a number from the server
533: }
534:
535: my $load;
536: if ($loadans =~ /\d/) {
537: if ($userloadans =~ /\d/) {
538: #both are numbers, pick the bigger one
539: $load = ($loadans > $userloadans) ? $loadans
540: : $userloadans;
541: } else {
542: $load = $loadans;
543: }
544: } else {
545: $load = $userloadans;
546: }
547:
548: if (($load =~ /\d/) && ($load < $lowest_load)) {
549: $spare_server = $try_server;
550: $lowest_load = $load;
551: }
552: return ($spare_server,$lowest_load);
553: }
554: # --------------------------------------------- Try to change a user's password
555:
556: sub changepass {
557: my ($uname,$udom,$currentpass,$newpass,$server,$context)=@_;
558: $currentpass = &escape($currentpass);
559: $newpass = &escape($newpass);
560: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass:$context",
561: $server);
562: if (! $answer) {
563: &logthis("No reply on password change request to $server ".
564: "by $uname in domain $udom.");
565: } elsif ($answer =~ "^ok") {
566: &logthis("$uname in $udom successfully changed their password ".
567: "on $server.");
568: } elsif ($answer =~ "^pwchange_failure") {
569: &logthis("$uname in $udom was unable to change their password ".
570: "on $server. The action was blocked by either lcpasswd ".
571: "or pwchange");
572: } elsif ($answer =~ "^non_authorized") {
573: &logthis("$uname in $udom did not get their password correct when ".
574: "attempting to change it on $server.");
575: } elsif ($answer =~ "^auth_mode_error") {
576: &logthis("$uname in $udom attempted to change their password despite ".
577: "not being locally or internally authenticated on $server.");
578: } elsif ($answer =~ "^unknown_user") {
579: &logthis("$uname in $udom attempted to change their password ".
580: "on $server but were unable to because $server is not ".
581: "their home server.");
582: } elsif ($answer =~ "^refused") {
583: &logthis("$server refused to change $uname in $udom password because ".
584: "it was sent an unencrypted request to change the password.");
585: }
586: return $answer;
587: }
588:
589: # ----------------------- Try to determine user's current authentication scheme
590:
591: sub queryauthenticate {
592: my ($uname,$udom)=@_;
593: my $uhome=&homeserver($uname,$udom);
594: if (!$uhome) {
595: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
596: return 'no_host';
597: }
598: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
599: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
600: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
601: }
602: return $answer;
603: }
604:
605: # --------- Try to authenticate user from domain's lib servers (first this one)
606:
607: sub authenticate {
608: my ($uname,$upass,$udom)=@_;
609: $upass=&escape($upass);
610: $uname= &LONCAPA::clean_username($uname);
611: my $uhome=&homeserver($uname,$udom,1);
612: if ((!$uhome) || ($uhome eq 'no_host')) {
613: # Maybe the machine was offline and only re-appeared again recently?
614: &reconlonc();
615: # One more
616: my $uhome=&homeserver($uname,$udom,1);
617: if ((!$uhome) || ($uhome eq 'no_host')) {
618: &logthis("User $uname at $udom is unknown in authenticate");
619: }
620: return 'no_host';
621: }
622: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
623: if ($answer eq 'authorized') {
624: &logthis("User $uname at $udom authorized by $uhome");
625: return $uhome;
626: }
627: if ($answer eq 'non_authorized') {
628: &logthis("User $uname at $udom rejected by $uhome");
629: return 'no_host';
630: }
631: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
632: return 'no_host';
633: }
634:
635: # ---------------------- Find the homebase for a user from domain's lib servers
636:
637: my %homecache;
638: sub homeserver {
639: my ($uname,$udom,$ignoreBadCache)=@_;
640: my $index="$uname:$udom";
641:
642: if (exists($homecache{$index})) { return $homecache{$index}; }
643:
644: my %servers = &get_servers($udom,'library');
645: foreach my $tryserver (keys(%servers)) {
646: next if ($ignoreBadCache ne 'true' &&
647: exists($badServerCache{$tryserver}));
648:
649: my $answer=reply("home:$udom:$uname",$tryserver);
650: if ($answer eq 'found') {
651: delete($badServerCache{$tryserver});
652: return $homecache{$index}=$tryserver;
653: } elsif ($answer eq 'no_host') {
654: $badServerCache{$tryserver}=1;
655: }
656: }
657: return 'no_host';
658: }
659:
660: # ------------------------------------- Find the usernames behind a list of IDs
661:
662: sub idget {
663: my ($udom,@ids)=@_;
664: my %returnhash=();
665:
666: my %servers = &get_servers($udom,'library');
667: foreach my $tryserver (keys(%servers)) {
668: my $idlist=join('&',@ids);
669: $idlist=~tr/A-Z/a-z/;
670: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
671: my @answer=();
672: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
673: @answer=split(/\&/,$reply);
674: } ;
675: my $i;
676: for ($i=0;$i<=$#ids;$i++) {
677: if ($answer[$i]) {
678: $returnhash{$ids[$i]}=$answer[$i];
679: }
680: }
681: }
682: return %returnhash;
683: }
684:
685: # ------------------------------------- Find the IDs behind a list of usernames
686:
687: sub idrget {
688: my ($udom,@unames)=@_;
689: my %returnhash=();
690: foreach my $uname (@unames) {
691: $returnhash{$uname}=(&userenvironment($udom,$uname,'id'))[1];
692: }
693: return %returnhash;
694: }
695:
696: # ------------------------------- Store away a list of names and associated IDs
697:
698: sub idput {
699: my ($udom,%ids)=@_;
700: my %servers=();
701: foreach my $uname (keys(%ids)) {
702: &cput('environment',{'id'=>$ids{$uname}},$udom,$uname);
703: my $uhom=&homeserver($uname,$udom);
704: if ($uhom ne 'no_host') {
705: my $id=&escape($ids{$uname});
706: $id=~tr/A-Z/a-z/;
707: my $esc_unam=&escape($uname);
708: if ($servers{$uhom}) {
709: $servers{$uhom}.='&'.$id.'='.$esc_unam;
710: } else {
711: $servers{$uhom}=$id.'='.$esc_unam;
712: }
713: }
714: }
715: foreach my $server (keys(%servers)) {
716: &critical('idput:'.$udom.':'.$servers{$server},$server);
717: }
718: }
719:
720: # ------------------------------------------- get items from domain db files
721:
722: sub get_dom {
723: my ($namespace,$storearr,$udom)=@_;
724: my $items='';
725: foreach my $item (@$storearr) {
726: $items.=&escape($item).'&';
727: }
728: $items=~s/\&$//;
729: if (!$udom) { $udom=$env{'user.domain'}; }
730: if (exists($domain_primary{$udom})) {
731: my $uhome=$domain_primary{$udom};
732: my $rep=&reply("getdom:$udom:$namespace:$items",$uhome);
733: my @pairs=split(/\&/,$rep);
734: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
735: return @pairs;
736: }
737: my %returnhash=();
738: my $i=0;
739: foreach my $item (@$storearr) {
740: $returnhash{$item}=&thaw_unescape($pairs[$i]);
741: $i++;
742: }
743: return %returnhash;
744: } else {
745: &logthis("get_dom failed - no primary domain server for $udom");
746: }
747: }
748:
749: # -------------------------------------------- put items in domain db files
750:
751: sub put_dom {
752: my ($namespace,$storehash,$udom)=@_;
753: if (!$udom) { $udom=$env{'user.domain'}; }
754: if (exists($domain_primary{$udom})) {
755: my $uhome=$domain_primary{$udom};
756: my $items='';
757: foreach my $item (keys(%$storehash)) {
758: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
759: }
760: $items=~s/\&$//;
761: return &reply("putdom:$udom:$namespace:$items",$uhome);
762: } else {
763: &logthis("put_dom failed - no primary domain server for $udom");
764: }
765: }
766:
767: sub retrieve_inst_usertypes {
768: my ($udom) = @_;
769: my (%returnhash,@order);
770: if (exists($domain_primary{$udom})) {
771: my $uhome=$domain_primary{$udom};
772: my $rep=&reply("inst_usertypes:$udom",$uhome);
773: my ($hashitems,$orderitems) = split(/:/,$rep);
774: my @pairs=split(/\&/,$hashitems);
775: foreach my $item (@pairs) {
776: my ($key,$value)=split(/=/,$item,2);
777: $key = &unescape($key);
778: next if ($key =~ /^error: 2 /);
779: $returnhash{$key}=&thaw_unescape($value);
780: }
781: my @esc_order = split(/\&/,$orderitems);
782: foreach my $item (@esc_order) {
783: push(@order,&unescape($item));
784: }
785: } else {
786: &logthis("get_dom failed - no primary domain server for $udom");
787: }
788: return (\%returnhash,\@order);
789: }
790:
791: # --------------------------------------------------- Assign a key to a student
792:
793: sub assign_access_key {
794: #
795: # a valid key looks like uname:udom#comments
796: # comments are being appended
797: #
798: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
799: $kdom=
800: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
801: $knum=
802: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
803: $cdom=
804: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
805: $cnum=
806: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
807: $udom=$env{'user.name'} unless (defined($udom));
808: $uname=$env{'user.domain'} unless (defined($uname));
809: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
810: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
811: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
812: # assigned to this person
813: # - this should not happen,
814: # unless something went wrong
815: # the first time around
816: # ready to assign
817: $logentry=$1.'; '.$logentry;
818: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
819: $kdom,$knum) eq 'ok') {
820: # key now belongs to user
821: my $envkey='key.'.$cdom.'_'.$cnum;
822: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
823: &appenv('environment.'.$envkey => $ckey);
824: return 'ok';
825: } else {
826: return
827: 'error: Count not permanently assign key, will need to be re-entered later.';
828: }
829: } else {
830: return 'error: Could not assign key, try again later.';
831: }
832: } elsif (!$existing{$ckey}) {
833: # the key does not exist
834: return 'error: The key does not exist';
835: } else {
836: # the key is somebody else's
837: return 'error: The key is already in use';
838: }
839: }
840:
841: # ------------------------------------------ put an additional comment on a key
842:
843: sub comment_access_key {
844: #
845: # a valid key looks like uname:udom#comments
846: # comments are being appended
847: #
848: my ($ckey,$cdom,$cnum,$logentry)=@_;
849: $cdom=
850: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
851: $cnum=
852: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
853: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
854: if ($existing{$ckey}) {
855: $existing{$ckey}.='; '.$logentry;
856: # ready to assign
857: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
858: $cdom,$cnum) eq 'ok') {
859: return 'ok';
860: } else {
861: return 'error: Count not store comment.';
862: }
863: } else {
864: # the key does not exist
865: return 'error: The key does not exist';
866: }
867: }
868:
869: # ------------------------------------------------------ Generate a set of keys
870:
871: sub generate_access_keys {
872: my ($number,$cdom,$cnum,$logentry)=@_;
873: $cdom=
874: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
875: $cnum=
876: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
877: unless (&allowed('mky',$cdom)) { return 0; }
878: unless (($cdom) && ($cnum)) { return 0; }
879: if ($number>10000) { return 0; }
880: sleep(2); # make sure don't get same seed twice
881: srand(time()^($$+($$<<15))); # from "Programming Perl"
882: my $total=0;
883: for (my $i=1;$i<=$number;$i++) {
884: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
885: sprintf("%lx",int(100000*rand)).'-'.
886: sprintf("%lx",int(100000*rand));
887: $newkey=~s/1/g/g; # folks mix up 1 and l
888: $newkey=~s/0/h/g; # and also 0 and O
889: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
890: if ($existing{$newkey}) {
891: $i--;
892: } else {
893: if (&put('accesskeys',
894: { $newkey => '# generated '.localtime().
895: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
896: '; '.$logentry },
897: $cdom,$cnum) eq 'ok') {
898: $total++;
899: }
900: }
901: }
902: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
903: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
904: return $total;
905: }
906:
907: # ------------------------------------------------------- Validate an accesskey
908:
909: sub validate_access_key {
910: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
911: $cdom=
912: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
913: $cnum=
914: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
915: $udom=$env{'user.domain'} unless (defined($udom));
916: $uname=$env{'user.name'} unless (defined($uname));
917: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
918: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
919: }
920:
921: # ------------------------------------- Find the section of student in a course
922: sub devalidate_getsection_cache {
923: my ($udom,$unam,$courseid)=@_;
924: my $hashid="$udom:$unam:$courseid";
925: &devalidate_cache_new('getsection',$hashid);
926: }
927:
928: sub courseid_to_courseurl {
929: my ($courseid) = @_;
930: #already url style courseid
931: return $courseid if ($courseid =~ m{^/});
932:
933: if (exists($env{'course.'.$courseid.'.num'})) {
934: my $cnum = $env{'course.'.$courseid.'.num'};
935: my $cdom = $env{'course.'.$courseid.'.domain'};
936: return "/$cdom/$cnum";
937: }
938:
939: my %courseinfo=&Apache::lonnet::coursedescription($courseid);
940: if (exists($courseinfo{'num'})) {
941: return "/$courseinfo{'domain'}/$courseinfo{'num'}";
942: }
943:
944: return undef;
945: }
946:
947: sub getsection {
948: my ($udom,$unam,$courseid)=@_;
949: my $cachetime=1800;
950:
951: my $hashid="$udom:$unam:$courseid";
952: my ($result,$cached)=&is_cached_new('getsection',$hashid);
953: if (defined($cached)) { return $result; }
954:
955: my %Pending;
956: my %Expired;
957: #
958: # Each role can either have not started yet (pending), be active,
959: # or have expired.
960: #
961: # If there is an active role, we are done.
962: #
963: # If there is more than one role which has not started yet,
964: # choose the one which will start sooner
965: # If there is one role which has not started yet, return it.
966: #
967: # If there is more than one expired role, choose the one which ended last.
968: # If there is a role which has expired, return it.
969: #
970: $courseid = &courseid_to_courseurl($courseid);
971: my %roleshash = &dump('roles',$udom,$unam,$courseid);
972: foreach my $key (keys(%roleshash)) {
973: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
974: my $section=$1;
975: if ($key eq $courseid.'_st') { $section=''; }
976: my ($dummy,$end,$start)=split(/\_/,&unescape($roleshash{$key}));
977: my $now=time;
978: if (defined($end) && $end && ($now > $end)) {
979: $Expired{$end}=$section;
980: next;
981: }
982: if (defined($start) && $start && ($now < $start)) {
983: $Pending{$start}=$section;
984: next;
985: }
986: return &do_cache_new('getsection',$hashid,$section,$cachetime);
987: }
988: #
989: # Presumedly there will be few matching roles from the above
990: # loop and the sorting time will be negligible.
991: if (scalar(keys(%Pending))) {
992: my ($time) = sort {$a <=> $b} keys(%Pending);
993: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
994: }
995: if (scalar(keys(%Expired))) {
996: my @sorted = sort {$a <=> $b} keys(%Expired);
997: my $time = pop(@sorted);
998: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
999: }
1000: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
1001: }
1002:
1003: sub save_cache {
1004: &purge_remembered();
1005: #&Apache::loncommon::validate_page();
1006: undef(%env);
1007: undef($env_loaded);
1008: }
1009:
1010: my $to_remember=-1;
1011: my %remembered;
1012: my %accessed;
1013: my $kicks=0;
1014: my $hits=0;
1015: sub devalidate_cache_new {
1016: my ($name,$id,$debug) = @_;
1017: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
1018: $id=&escape($name.':'.$id);
1019: $memcache->delete($id);
1020: delete($remembered{$id});
1021: delete($accessed{$id});
1022: }
1023:
1024: sub is_cached_new {
1025: my ($name,$id,$debug) = @_;
1026: $id=&escape($name.':'.$id);
1027: if (exists($remembered{$id})) {
1028: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
1029: $accessed{$id}=[&gettimeofday()];
1030: $hits++;
1031: return ($remembered{$id},1);
1032: }
1033: my $value = $memcache->get($id);
1034: if (!(defined($value))) {
1035: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
1036: return (undef,undef);
1037: }
1038: if ($value eq '__undef__') {
1039: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
1040: $value=undef;
1041: }
1042: &make_room($id,$value,$debug);
1043: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
1044: return ($value,1);
1045: }
1046:
1047: sub do_cache_new {
1048: my ($name,$id,$value,$time,$debug) = @_;
1049: $id=&escape($name.':'.$id);
1050: my $setvalue=$value;
1051: if (!defined($setvalue)) {
1052: $setvalue='__undef__';
1053: }
1054: if (!defined($time) ) {
1055: $time=600;
1056: }
1057: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
1058: $memcache->set($id,$setvalue,$time);
1059: # need to make a copy of $value
1060: #&make_room($id,$value,$debug);
1061: return $value;
1062: }
1063:
1064: sub make_room {
1065: my ($id,$value,$debug)=@_;
1066: $remembered{$id}=$value;
1067: if ($to_remember<0) { return; }
1068: $accessed{$id}=[&gettimeofday()];
1069: if (scalar(keys(%remembered)) <= $to_remember) { return; }
1070: my $to_kick;
1071: my $max_time=0;
1072: foreach my $other (keys(%accessed)) {
1073: if (&tv_interval($accessed{$other}) > $max_time) {
1074: $to_kick=$other;
1075: $max_time=&tv_interval($accessed{$other});
1076: }
1077: }
1078: delete($remembered{$to_kick});
1079: delete($accessed{$to_kick});
1080: $kicks++;
1081: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
1082: return;
1083: }
1084:
1085: sub purge_remembered {
1086: #&logthis("Tossing ".scalar(keys(%remembered)));
1087: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
1088: undef(%remembered);
1089: undef(%accessed);
1090: }
1091: # ------------------------------------- Read an entry from a user's environment
1092:
1093: sub userenvironment {
1094: my ($udom,$unam,@what)=@_;
1095: my %returnhash=();
1096: my @answer=split(/\&/,
1097: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1098: &homeserver($unam,$udom)));
1099: my $i;
1100: for ($i=0;$i<=$#what;$i++) {
1101: $returnhash{$what[$i]}=&unescape($answer[$i]);
1102: }
1103: return %returnhash;
1104: }
1105:
1106: # ---------------------------------------------------------- Get a studentphoto
1107: sub studentphoto {
1108: my ($udom,$unam,$ext) = @_;
1109: my $home=&Apache::lonnet::homeserver($unam,$udom);
1110: if (defined($env{'request.course.id'})) {
1111: if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
1112: if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
1113: return(&retrievestudentphoto($udom,$unam,$ext));
1114: } else {
1115: my ($result,$perm_reqd)=
1116: &Apache::lonnet::auto_photo_permission($unam,$udom);
1117: if ($result eq 'ok') {
1118: if (!($perm_reqd eq 'yes')) {
1119: return(&retrievestudentphoto($udom,$unam,$ext));
1120: }
1121: }
1122: }
1123: }
1124: } else {
1125: my ($result,$perm_reqd) =
1126: &Apache::lonnet::auto_photo_permission($unam,$udom);
1127: if ($result eq 'ok') {
1128: if (!($perm_reqd eq 'yes')) {
1129: return(&retrievestudentphoto($udom,$unam,$ext));
1130: }
1131: }
1132: }
1133: return '/adm/lonKaputt/lonlogo_broken.gif';
1134: }
1135:
1136: sub retrievestudentphoto {
1137: my ($udom,$unam,$ext,$type) = @_;
1138: my $home=&Apache::lonnet::homeserver($unam,$udom);
1139: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
1140: if ($ret eq 'ok') {
1141: my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
1142: if ($type eq 'thumbnail') {
1143: $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
1144: }
1145: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
1146: return $tokenurl;
1147: } else {
1148: if ($type eq 'thumbnail') {
1149: return '/adm/lonKaputt/genericstudent_tn.gif';
1150: } else {
1151: return '/adm/lonKaputt/lonlogo_broken.gif';
1152: }
1153: }
1154: }
1155:
1156: # -------------------------------------------------------------------- New chat
1157:
1158: sub chatsend {
1159: my ($newentry,$anon,$group)=@_;
1160: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1161: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1162: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1163: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1164: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
1165: &escape($newentry)).':'.$group,$chome);
1166: }
1167:
1168: # ------------------------------------------ Find current version of a resource
1169:
1170: sub getversion {
1171: my $fname=&clutter(shift);
1172: unless ($fname=~/^\/res\//) { return -1; }
1173: return ¤tversion(&filelocation('',$fname));
1174: }
1175:
1176: sub currentversion {
1177: my $fname=shift;
1178: my ($result,$cached)=&is_cached_new('resversion',$fname);
1179: if (defined($cached)) { return $result; }
1180: my $author=$fname;
1181: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1182: my ($udom,$uname)=split(/\//,$author);
1183: my $home=homeserver($uname,$udom);
1184: if ($home eq 'no_host') {
1185: return -1;
1186: }
1187: my $answer=reply("currentversion:$fname",$home);
1188: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1189: return -1;
1190: }
1191: return &do_cache_new('resversion',$fname,$answer,600);
1192: }
1193:
1194: # ----------------------------- Subscribe to a resource, return URL if possible
1195:
1196: sub subscribe {
1197: my $fname=shift;
1198: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1199: $fname=~s/[\n\r]//g;
1200: my $author=$fname;
1201: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1202: my ($udom,$uname)=split(/\//,$author);
1203: my $home=homeserver($uname,$udom);
1204: if ($home eq 'no_host') {
1205: return 'not_found';
1206: }
1207: my $answer=reply("sub:$fname",$home);
1208: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1209: $answer.=' by '.$home;
1210: }
1211: return $answer;
1212: }
1213:
1214: # -------------------------------------------------------------- Replicate file
1215:
1216: sub repcopy {
1217: my $filename=shift;
1218: $filename=~s/\/+/\//g;
1219: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1220: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1221: if ($filename=~m|^/home/httpd/html/userfiles/| or
1222: $filename=~m -^/*(uploaded|editupload)/-) {
1223: return &repcopy_userfile($filename);
1224: }
1225: $filename=~s/[\n\r]//g;
1226: my $transname="$filename.in.transfer";
1227: # FIXME: this should flock
1228: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1229: my $remoteurl=subscribe($filename);
1230: if ($remoteurl =~ /^con_lost by/) {
1231: &logthis("Subscribe returned $remoteurl: $filename");
1232: return 'unavailable';
1233: } elsif ($remoteurl eq 'not_found') {
1234: #&logthis("Subscribe returned not_found: $filename");
1235: return 'not_found';
1236: } elsif ($remoteurl =~ /^rejected by/) {
1237: &logthis("Subscribe returned $remoteurl: $filename");
1238: return 'forbidden';
1239: } elsif ($remoteurl eq 'directory') {
1240: return 'ok';
1241: } else {
1242: my $author=$filename;
1243: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1244: my ($udom,$uname)=split(/\//,$author);
1245: my $home=homeserver($uname,$udom);
1246: unless ($home eq $perlvar{'lonHostID'}) {
1247: my @parts=split(/\//,$filename);
1248: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1249: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1250: &logthis("Malconfiguration for replication: $filename");
1251: return 'bad_request';
1252: }
1253: my $count;
1254: for ($count=5;$count<$#parts;$count++) {
1255: $path.="/$parts[$count]";
1256: if ((-e $path)!=1) {
1257: mkdir($path,0777);
1258: }
1259: }
1260: my $ua=new LWP::UserAgent;
1261: my $request=new HTTP::Request('GET',"$remoteurl");
1262: my $response=$ua->request($request,$transname);
1263: if ($response->is_error()) {
1264: unlink($transname);
1265: my $message=$response->status_line;
1266: &logthis("<font color=\"blue\">WARNING:"
1267: ." LWP get: $message: $filename</font>");
1268: return 'unavailable';
1269: } else {
1270: if ($remoteurl!~/\.meta$/) {
1271: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1272: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1273: if ($mresponse->is_error()) {
1274: unlink($filename.'.meta');
1275: &logthis(
1276: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1277: }
1278: }
1279: rename($transname,$filename);
1280: return 'ok';
1281: }
1282: }
1283: }
1284: }
1285:
1286: # ------------------------------------------------ Get server side include body
1287: sub ssi_body {
1288: my ($filelink,%form)=@_;
1289: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1290: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1291: }
1292: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1293: &ssi($filelink,%form));
1294: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
1295: $output=~s/^.*?\<body[^\>]*\>//si;
1296: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1297: return $output;
1298: }
1299:
1300: # --------------------------------------------------------- Server Side Include
1301:
1302: sub absolute_url {
1303: my ($host_name) = @_;
1304: my $protocol = ($ENV{'SERVER_PORT'} == 443?'https://':'http://');
1305: if ($host_name eq '') {
1306: $host_name = $ENV{'SERVER_NAME'};
1307: }
1308: return $protocol.$host_name;
1309: }
1310:
1311: sub ssi {
1312:
1313: my ($fn,%form)=@_;
1314:
1315: my $ua=new LWP::UserAgent;
1316:
1317: my $request;
1318:
1319: $form{'no_update_last_known'}=1;
1320:
1321: if (%form) {
1322: $request=new HTTP::Request('POST',&absolute_url().$fn);
1323: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1324: } else {
1325: $request=new HTTP::Request('GET',&absolute_url().$fn);
1326: }
1327:
1328: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1329: my $response=$ua->request($request);
1330:
1331: return $response->content;
1332: }
1333:
1334: sub externalssi {
1335: my ($url)=@_;
1336: my $ua=new LWP::UserAgent;
1337: my $request=new HTTP::Request('GET',$url);
1338: my $response=$ua->request($request);
1339: return $response->content;
1340: }
1341:
1342: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1343:
1344: sub allowuploaded {
1345: my ($srcurl,$url)=@_;
1346: $url=&clutter(&declutter($url));
1347: my $dir=$url;
1348: $dir=~s/\/[^\/]+$//;
1349: my %httpref=();
1350: my $httpurl=&hreflocation('',$url);
1351: $httpref{'httpref.'.$httpurl}=$srcurl;
1352: &Apache::lonnet::appenv(%httpref);
1353: }
1354:
1355: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1356: # input: action, courseID, current domain, intended
1357: # path to file, source of file, instruction to parse file for objects,
1358: # ref to hash for embedded objects,
1359: # ref to hash for codebase of java objects.
1360: #
1361: # output: url to file (if action was uploaddoc),
1362: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1363: #
1364: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1365: # course.
1366: #
1367: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1368: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1369: # course's home server.
1370: #
1371: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1372: # be copied from $source (current location) to
1373: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1374: # and will then be copied to
1375: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1376: # course's home server.
1377: #
1378: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1379: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1380: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1381: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1382: # in course's home server.
1383: #
1384:
1385: sub process_coursefile {
1386: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1387: my $fetchresult;
1388: my $home=&homeserver($docuname,$docudom);
1389: if ($action eq 'propagate') {
1390: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1391: $home);
1392: } else {
1393: my $fpath = '';
1394: my $fname = $file;
1395: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1396: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1397: my $filepath = &build_filepath($fpath);
1398: if ($action eq 'copy') {
1399: if ($source eq '') {
1400: $fetchresult = 'no source file';
1401: return $fetchresult;
1402: } else {
1403: my $destination = $filepath.'/'.$fname;
1404: rename($source,$destination);
1405: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1406: $home);
1407: }
1408: } elsif ($action eq 'uploaddoc') {
1409: open(my $fh,'>'.$filepath.'/'.$fname);
1410: print $fh $env{'form.'.$source};
1411: close($fh);
1412: if ($parser eq 'parse') {
1413: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1414: unless ($parse_result eq 'ok') {
1415: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1416: }
1417: }
1418: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1419: $home);
1420: if ($fetchresult eq 'ok') {
1421: return '/uploaded/'.$fpath.'/'.$fname;
1422: } else {
1423: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1424: ' to host '.$home.': '.$fetchresult);
1425: return '/adm/notfound.html';
1426: }
1427: }
1428: }
1429: unless ( $fetchresult eq 'ok') {
1430: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1431: ' to host '.$home.': '.$fetchresult);
1432: }
1433: return $fetchresult;
1434: }
1435:
1436: sub build_filepath {
1437: my ($fpath) = @_;
1438: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1439: unless ($fpath eq '') {
1440: my @parts=split('/',$fpath);
1441: foreach my $part (@parts) {
1442: $filepath.= '/'.$part;
1443: if ((-e $filepath)!=1) {
1444: mkdir($filepath,0777);
1445: }
1446: }
1447: }
1448: return $filepath;
1449: }
1450:
1451: sub store_edited_file {
1452: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1453: my $file = $primary_url;
1454: $file =~ s#^/uploaded/$docudom/$docuname/##;
1455: my $fpath = '';
1456: my $fname = $file;
1457: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1458: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1459: my $filepath = &build_filepath($fpath);
1460: open(my $fh,'>'.$filepath.'/'.$fname);
1461: print $fh $content;
1462: close($fh);
1463: my $home=&homeserver($docuname,$docudom);
1464: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1465: $home);
1466: if ($$fetchresult eq 'ok') {
1467: return '/uploaded/'.$fpath.'/'.$fname;
1468: } else {
1469: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1470: ' to host '.$home.': '.$$fetchresult);
1471: return '/adm/notfound.html';
1472: }
1473: }
1474:
1475: sub clean_filename {
1476: my ($fname,$args)=@_;
1477: # Replace Windows backslashes by forward slashes
1478: $fname=~s/\\/\//g;
1479: if (!$args->{'keep_path'}) {
1480: # Get rid of everything but the actual filename
1481: $fname=~s/^.*\/([^\/]+)$/$1/;
1482: }
1483: # Replace spaces by underscores
1484: $fname=~s/\s+/\_/g;
1485: # Replace all other weird characters by nothing
1486: $fname=~s{[^/\w\.\-]}{}g;
1487: # Replace all .\d. sequences with _\d. so they no longer look like version
1488: # numbers
1489: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1490: return $fname;
1491: }
1492:
1493: # --------------- Take an uploaded file and put it into the userfiles directory
1494: # input: $formname - the contents of the file are in $env{"form.$formname"}
1495: # the desired filenam is in $env{"form.$formname.filename"}
1496: # $coursedoc - if true up to the current course
1497: # if false
1498: # $subdir - directory in userfile to store the file into
1499: # $parser, $allfiles, $codebase - unknown
1500: #
1501: # output: url of file in userspace, or error: <message>
1502: # or /adm/notfound.html if failure to upload occurse
1503:
1504:
1505: sub userfileupload {
1506: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,$destudom)=@_;
1507: if (!defined($subdir)) { $subdir='unknown'; }
1508: my $fname=$env{'form.'.$formname.'.filename'};
1509: $fname=&clean_filename($fname);
1510: # See if there is anything left
1511: unless ($fname) { return 'error: no uploaded file'; }
1512: chop($env{'form.'.$formname});
1513: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1514: my $now = time;
1515: my $filepath = 'tmp/helprequests/'.$now;
1516: my @parts=split(/\//,$filepath);
1517: my $fullpath = $perlvar{'lonDaemons'};
1518: for (my $i=0;$i<@parts;$i++) {
1519: $fullpath .= '/'.$parts[$i];
1520: if ((-e $fullpath)!=1) {
1521: mkdir($fullpath,0777);
1522: }
1523: }
1524: open(my $fh,'>'.$fullpath.'/'.$fname);
1525: print $fh $env{'form.'.$formname};
1526: close($fh);
1527: return $fullpath.'/'.$fname;
1528: } elsif (($formname eq 'coursecreatorxml') && ($subdir eq 'batchupload')) { #files uploaded to create course page are handled differently
1529: my $filepath = 'tmp/addcourse/'.$destudom.'/web/'.$env{'user.name'}.
1530: '_'.$env{'user.domain'}.'/pending';
1531: my @parts=split(/\//,$filepath);
1532: my $fullpath = $perlvar{'lonDaemons'};
1533: for (my $i=0;$i<@parts;$i++) {
1534: $fullpath .= '/'.$parts[$i];
1535: if ((-e $fullpath)!=1) {
1536: mkdir($fullpath,0777);
1537: }
1538: }
1539: open(my $fh,'>'.$fullpath.'/'.$fname);
1540: print $fh $env{'form.'.$formname};
1541: close($fh);
1542: return $fullpath.'/'.$fname;
1543: }
1544:
1545: # Create the directory if not present
1546: $fname="$subdir/$fname";
1547: if ($coursedoc) {
1548: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1549: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1550: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1551: return &finishuserfileupload($docuname,$docudom,
1552: $formname,$fname,$parser,$allfiles,
1553: $codebase);
1554: } else {
1555: $fname=$env{'form.folder'}.'/'.$fname;
1556: return &process_coursefile('uploaddoc',$docuname,$docudom,
1557: $fname,$formname,$parser,
1558: $allfiles,$codebase);
1559: }
1560: } elsif (defined($destuname)) {
1561: my $docuname=$destuname;
1562: my $docudom=$destudom;
1563: return &finishuserfileupload($docuname,$docudom,$formname,
1564: $fname,$parser,$allfiles,$codebase);
1565:
1566: } else {
1567: my $docuname=$env{'user.name'};
1568: my $docudom=$env{'user.domain'};
1569: if (exists($env{'form.group'})) {
1570: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1571: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1572: }
1573: return &finishuserfileupload($docuname,$docudom,$formname,
1574: $fname,$parser,$allfiles,$codebase);
1575: }
1576: }
1577:
1578: sub finishuserfileupload {
1579: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
1580: my $path=$docudom.'/'.$docuname.'/';
1581: my $filepath=$perlvar{'lonDocRoot'};
1582: my ($fnamepath,$file);
1583: $file=$fname;
1584: if ($fname=~m|/|) {
1585: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1586: $path.=$fnamepath.'/';
1587: }
1588: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1589: my $count;
1590: for ($count=4;$count<=$#parts;$count++) {
1591: $filepath.="/$parts[$count]";
1592: if ((-e $filepath)!=1) {
1593: mkdir($filepath,0777);
1594: }
1595: }
1596: # Save the file
1597: {
1598: if (!open(FH,'>'.$filepath.'/'.$file)) {
1599: &logthis('Failed to create '.$filepath.'/'.$file);
1600: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1601: return '/adm/notfound.html';
1602: }
1603: if (!print FH ($env{'form.'.$formname})) {
1604: &logthis('Failed to write to '.$filepath.'/'.$file);
1605: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1606: return '/adm/notfound.html';
1607: }
1608: close(FH);
1609: }
1610: if ($parser eq 'parse') {
1611: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1612: $codebase);
1613: unless ($parse_result eq 'ok') {
1614: &logthis('Failed to parse '.$filepath.$file.
1615: ' for embedded media: '.$parse_result);
1616: }
1617: }
1618: # Notify homeserver to grep it
1619: #
1620: my $docuhome=&homeserver($docuname,$docudom);
1621: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1622: if ($fetchresult eq 'ok') {
1623: #
1624: # Return the URL to it
1625: return '/uploaded/'.$path.$file;
1626: } else {
1627: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1628: ': '.$fetchresult);
1629: return '/adm/notfound.html';
1630: }
1631: }
1632:
1633: sub extract_embedded_items {
1634: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1635: my @state = ();
1636: my %javafiles = (
1637: codebase => '',
1638: code => '',
1639: archive => ''
1640: );
1641: my %mediafiles = (
1642: src => '',
1643: movie => '',
1644: );
1645: my $p;
1646: if ($content) {
1647: $p = HTML::LCParser->new($content);
1648: } else {
1649: $p = HTML::LCParser->new($filepath.'/'.$file);
1650: }
1651: while (my $t=$p->get_token()) {
1652: if ($t->[0] eq 'S') {
1653: my ($tagname, $attr) = ($t->[1],$t->[2]);
1654: push (@state, $tagname);
1655: if (lc($tagname) eq 'allow') {
1656: &add_filetype($allfiles,$attr->{'src'},'src');
1657: }
1658: if (lc($tagname) eq 'img') {
1659: &add_filetype($allfiles,$attr->{'src'},'src');
1660: }
1661: if (lc($tagname) eq 'script') {
1662: if ($attr->{'archive'} =~ /\.jar$/i) {
1663: &add_filetype($allfiles,$attr->{'archive'},'archive');
1664: } else {
1665: &add_filetype($allfiles,$attr->{'src'},'src');
1666: }
1667: }
1668: if (lc($tagname) eq 'link') {
1669: if (lc($attr->{'rel'}) eq 'stylesheet') {
1670: &add_filetype($allfiles,$attr->{'href'},'href');
1671: }
1672: }
1673: if (lc($tagname) eq 'object' ||
1674: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1675: foreach my $item (keys(%javafiles)) {
1676: $javafiles{$item} = '';
1677: }
1678: }
1679: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1680: my $name = lc($attr->{'name'});
1681: foreach my $item (keys(%javafiles)) {
1682: if ($name eq $item) {
1683: $javafiles{$item} = $attr->{'value'};
1684: last;
1685: }
1686: }
1687: foreach my $item (keys(%mediafiles)) {
1688: if ($name eq $item) {
1689: &add_filetype($allfiles, $attr->{'value'}, 'value');
1690: last;
1691: }
1692: }
1693: }
1694: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1695: foreach my $item (keys(%javafiles)) {
1696: if ($attr->{$item}) {
1697: $javafiles{$item} = $attr->{$item};
1698: last;
1699: }
1700: }
1701: foreach my $item (keys(%mediafiles)) {
1702: if ($attr->{$item}) {
1703: &add_filetype($allfiles,$attr->{$item},$item);
1704: last;
1705: }
1706: }
1707: }
1708: } elsif ($t->[0] eq 'E') {
1709: my ($tagname) = ($t->[1]);
1710: if ($javafiles{'codebase'} ne '') {
1711: $javafiles{'codebase'} .= '/';
1712: }
1713: if (lc($tagname) eq 'applet' ||
1714: lc($tagname) eq 'object' ||
1715: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1716: ) {
1717: foreach my $item (keys(%javafiles)) {
1718: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1719: my $file=$javafiles{'codebase'}.$javafiles{$item};
1720: &add_filetype($allfiles,$file,$item);
1721: }
1722: }
1723: }
1724: pop @state;
1725: }
1726: }
1727: return 'ok';
1728: }
1729:
1730: sub add_filetype {
1731: my ($allfiles,$file,$type)=@_;
1732: if (exists($allfiles->{$file})) {
1733: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1734: push(@{$allfiles->{$file}}, &escape($type));
1735: }
1736: } else {
1737: @{$allfiles->{$file}} = (&escape($type));
1738: }
1739: }
1740:
1741: sub removeuploadedurl {
1742: my ($url)=@_;
1743: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1744: return &removeuserfile($uname,$udom,$fname);
1745: }
1746:
1747: sub removeuserfile {
1748: my ($docuname,$docudom,$fname)=@_;
1749: my $home=&homeserver($docuname,$docudom);
1750: my $result = &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1751: if ($result eq 'ok') {
1752: if (($fname !~ /\.meta$/) && (&is_portfolio_file($fname))) {
1753: my $metafile = $fname.'.meta';
1754: my $metaresult = &removeuserfile($docuname,$docudom,$metafile);
1755: my $url = "/uploaded/$docudom/$docuname/$fname";
1756: my ($file,$group) = (&parse_portfolio_url($url))[3,4];
1757: my $sqlresult =
1758: &update_portfolio_table($docuname,$docudom,$file,
1759: 'portfolio_metadata',$group,
1760: 'delete');
1761: }
1762: }
1763: return $result;
1764: }
1765:
1766: sub mkdiruserfile {
1767: my ($docuname,$docudom,$dir)=@_;
1768: my $home=&homeserver($docuname,$docudom);
1769: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1770: }
1771:
1772: sub renameuserfile {
1773: my ($docuname,$docudom,$old,$new)=@_;
1774: my $home=&homeserver($docuname,$docudom);
1775: my $result = &reply("renameuserfile:$docudom:$docuname:".
1776: &escape("$old").':'.&escape("$new"),$home);
1777: if ($result eq 'ok') {
1778: if (($old !~ /\.meta$/) && (&is_portfolio_file($old))) {
1779: my $oldmeta = $old.'.meta';
1780: my $newmeta = $new.'.meta';
1781: my $metaresult =
1782: &renameuserfile($docuname,$docudom,$oldmeta,$newmeta);
1783: my $url = "/uploaded/$docudom/$docuname/$old";
1784: my ($file,$group) = (&parse_portfolio_url($url))[3,4];
1785: my $sqlresult =
1786: &update_portfolio_table($docuname,$docudom,$file,
1787: 'portfolio_metadata',$group,
1788: 'delete');
1789: }
1790: }
1791: return $result;
1792: }
1793:
1794: # ------------------------------------------------------------------------- Log
1795:
1796: sub log {
1797: my ($dom,$nam,$hom,$what)=@_;
1798: return critical("log:$dom:$nam:$what",$hom);
1799: }
1800:
1801: # ------------------------------------------------------------------ Course Log
1802: #
1803: # This routine flushes several buffers of non-mission-critical nature
1804: #
1805:
1806: sub flushcourselogs {
1807: &logthis('Flushing log buffers');
1808: #
1809: # course logs
1810: # This is a log of all transactions in a course, which can be used
1811: # for data mining purposes
1812: #
1813: # It also collects the courseid database, which lists last transaction
1814: # times and course titles for all courseids
1815: #
1816: my %courseidbuffer=();
1817: foreach my $crsid (keys %courselogs) {
1818: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1819: &escape($courselogs{$crsid}),
1820: $coursehombuf{$crsid}) eq 'ok') {
1821: delete $courselogs{$crsid};
1822: } else {
1823: &logthis('Failed to flush log buffer for '.$crsid);
1824: if (length($courselogs{$crsid})>40000) {
1825: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
1826: " exceeded maximum size, deleting.</font>");
1827: delete $courselogs{$crsid};
1828: }
1829: }
1830: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1831: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1832: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1833: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1834: } else {
1835: $courseidbuffer{$coursehombuf{$crsid}}=
1836: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1837: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1838: }
1839: }
1840: #
1841: # Write course id database (reverse lookup) to homeserver of courses
1842: # Is used in pickcourse
1843: #
1844: foreach my $crs_home (keys(%courseidbuffer)) {
1845: &courseidput(&host_domain($crs_home),$courseidbuffer{$crs_home},
1846: $crs_home);
1847: }
1848: #
1849: # File accesses
1850: # Writes to the dynamic metadata of resources to get hit counts, etc.
1851: #
1852: foreach my $entry (keys(%accesshash)) {
1853: if ($entry =~ /___count$/) {
1854: my ($dom,$name);
1855: ($dom,$name,undef)=
1856: ($entry=~m{___($match_domain)/($match_name)/(.*)___count$});
1857: if (! defined($dom) || $dom eq '' ||
1858: ! defined($name) || $name eq '') {
1859: my $cid = $env{'request.course.id'};
1860: $dom = $env{'request.'.$cid.'.domain'};
1861: $name = $env{'request.'.$cid.'.num'};
1862: }
1863: my $value = $accesshash{$entry};
1864: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1865: my %temphash=($url => $value);
1866: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1867: if ($result eq 'ok') {
1868: delete $accesshash{$entry};
1869: } elsif ($result eq 'unknown_cmd') {
1870: # Target server has old code running on it.
1871: my %temphash=($entry => $value);
1872: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1873: delete $accesshash{$entry};
1874: }
1875: }
1876: } else {
1877: my ($dom,$name) = ($entry=~m{___($match_domain)/($match_name)/(.*)___(\w+)$});
1878: my %temphash=($entry => $accesshash{$entry});
1879: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1880: delete $accesshash{$entry};
1881: }
1882: }
1883: }
1884: #
1885: # Roles
1886: # Reverse lookup of user roles for course faculty/staff and co-authorship
1887: #
1888: foreach my $entry (keys(%userrolehash)) {
1889: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1890: split(/\:/,$entry);
1891: if (&Apache::lonnet::put('nohist_userroles',
1892: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1893: $rudom,$runame) eq 'ok') {
1894: delete $userrolehash{$entry};
1895: }
1896: }
1897: #
1898: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1899: #
1900: my %domrolebuffer = ();
1901: foreach my $entry (keys %domainrolehash) {
1902: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1903: if ($domrolebuffer{$rudom}) {
1904: $domrolebuffer{$rudom}.='&'.&escape($entry).
1905: '='.&escape($domainrolehash{$entry});
1906: } else {
1907: $domrolebuffer{$rudom}.=&escape($entry).
1908: '='.&escape($domainrolehash{$entry});
1909: }
1910: delete $domainrolehash{$entry};
1911: }
1912: foreach my $dom (keys(%domrolebuffer)) {
1913: my %servers = &get_servers($dom,'library');
1914: foreach my $tryserver (keys(%servers)) {
1915: unless (&reply('domroleput:'.$dom.':'.
1916: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1917: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1918: }
1919: }
1920: }
1921: $dumpcount++;
1922: }
1923:
1924: sub courselog {
1925: my $what=shift;
1926: $what=time.':'.$what;
1927: unless ($env{'request.course.id'}) { return ''; }
1928: $coursedombuf{$env{'request.course.id'}}=
1929: $env{'course.'.$env{'request.course.id'}.'.domain'};
1930: $coursenumbuf{$env{'request.course.id'}}=
1931: $env{'course.'.$env{'request.course.id'}.'.num'};
1932: $coursehombuf{$env{'request.course.id'}}=
1933: $env{'course.'.$env{'request.course.id'}.'.home'};
1934: $coursedescrbuf{$env{'request.course.id'}}=
1935: $env{'course.'.$env{'request.course.id'}.'.description'};
1936: $courseinstcodebuf{$env{'request.course.id'}}=
1937: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1938: $courseownerbuf{$env{'request.course.id'}}=
1939: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1940: $coursetypebuf{$env{'request.course.id'}}=
1941: $env{'course.'.$env{'request.course.id'}.'.type'};
1942: if (defined $courselogs{$env{'request.course.id'}}) {
1943: $courselogs{$env{'request.course.id'}}.='&'.$what;
1944: } else {
1945: $courselogs{$env{'request.course.id'}}.=$what;
1946: }
1947: if (length($courselogs{$env{'request.course.id'}})>4048) {
1948: &flushcourselogs();
1949: }
1950: }
1951:
1952: sub courseacclog {
1953: my $fnsymb=shift;
1954: unless ($env{'request.course.id'}) { return ''; }
1955: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1956: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1957: $what.=':POST';
1958: # FIXME: Probably ought to escape things....
1959: foreach my $key (keys(%env)) {
1960: if ($key=~/^form\.(.*)/) {
1961: $what.=':'.$1.'='.$env{$key};
1962: }
1963: }
1964: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1965: # FIXME: We should not be depending on a form parameter that someone
1966: # editing lonsearchcat.pm might change in the future.
1967: if ($env{'form.phase'} eq 'course_search') {
1968: $what.= ':POST';
1969: # FIXME: Probably ought to escape things....
1970: foreach my $element ('courseexp','crsfulltext','crsrelated',
1971: 'crsdiscuss') {
1972: $what.=':'.$element.'='.$env{'form.'.$element};
1973: }
1974: }
1975: }
1976: &courselog($what);
1977: }
1978:
1979: sub countacc {
1980: my $url=&declutter(shift);
1981: return if (! defined($url) || $url eq '');
1982: unless ($env{'request.course.id'}) { return ''; }
1983: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1984: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1985: $accesshash{$key}++;
1986: }
1987:
1988: sub linklog {
1989: my ($from,$to)=@_;
1990: $from=&declutter($from);
1991: $to=&declutter($to);
1992: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1993: $accesshash{$to.'___'.$from.'___goto'}=1;
1994: }
1995:
1996: sub userrolelog {
1997: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1998: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
1999: ($trole=~/^in/) || ($trole=~/^cc/) ||
2000: ($trole=~/^ep/) || ($trole=~/^cr/) ||
2001: ($trole=~/^ta/)) {
2002: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
2003: $userrolehash
2004: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
2005: =$tend.':'.$tstart;
2006: }
2007: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
2008: ($trole=~/^li/) || ($trole=~/^li/) ||
2009: ($trole=~/^au/) || ($trole=~/^dg/) ||
2010: ($trole=~/^sc/)) {
2011: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
2012: $domainrolehash
2013: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
2014: = $tend.':'.$tstart;
2015: }
2016: }
2017:
2018: sub get_course_adv_roles {
2019: my $cid=shift;
2020: $cid=$env{'request.course.id'} unless (defined($cid));
2021: my %coursehash=&coursedescription($cid);
2022: my %nothide=();
2023: foreach my $user (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
2024: $nothide{join(':',split(/[\@\:]/,$user))}=1;
2025: }
2026: my %returnhash=();
2027: my %dumphash=
2028: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
2029: my $now=time;
2030: foreach my $entry (keys %dumphash) {
2031: my ($tend,$tstart)=split(/\:/,$dumphash{$entry});
2032: if (($tstart) && ($tstart<0)) { next; }
2033: if (($tend) && ($tend<$now)) { next; }
2034: if (($tstart) && ($now<$tstart)) { next; }
2035: my ($role,$username,$domain,$section)=split(/\:/,$entry);
2036: if ($username eq '' || $domain eq '') { next; }
2037: if ((&privileged($username,$domain)) &&
2038: (!$nothide{$username.':'.$domain})) { next; }
2039: if ($role eq 'cr') { next; }
2040: my $key=&plaintext($role);
2041: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
2042: if ($returnhash{$key}) {
2043: $returnhash{$key}.=','.$username.':'.$domain;
2044: } else {
2045: $returnhash{$key}=$username.':'.$domain;
2046: }
2047: }
2048: return %returnhash;
2049: }
2050:
2051: sub get_my_roles {
2052: my ($uname,$udom,$types,$roles,$roledoms)=@_;
2053: unless (defined($uname)) { $uname=$env{'user.name'}; }
2054: unless (defined($udom)) { $udom=$env{'user.domain'}; }
2055: my %dumphash=
2056: &dump('nohist_userroles',$udom,$uname);
2057: my %returnhash=();
2058: my $now=time;
2059: foreach my $entry (keys(%dumphash)) {
2060: my ($tend,$tstart)=split(/\:/,$dumphash{$entry});
2061: if (($tstart) && ($tstart<0)) { next; }
2062: my $status = 'active';
2063: if (($tend) && ($tend<$now)) {
2064: $status = 'previous';
2065: }
2066: if (($tstart) && ($now<$tstart)) {
2067: $status = 'future';
2068: }
2069: if (ref($types) eq 'ARRAY') {
2070: if (!grep(/^\Q$status\E$/,@{$types})) {
2071: next;
2072: }
2073: } else {
2074: if ($status ne 'active') {
2075: next;
2076: }
2077: }
2078: my ($role,$username,$domain,$section)=split(/\:/,$entry);
2079: if (ref($roledoms) eq 'ARRAY') {
2080: if (!grep(/^\Q$domain\E$/,@{$roledoms})) {
2081: next;
2082: }
2083: }
2084: if (ref($roles) eq 'ARRAY') {
2085: if (!grep(/^\Q$role\E$/,@{$roles})) {
2086: next;
2087: }
2088: }
2089: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
2090: }
2091: return %returnhash;
2092: }
2093:
2094: # ----------------------------------------------------- Frontpage Announcements
2095: #
2096: #
2097:
2098: sub postannounce {
2099: my ($server,$text)=@_;
2100: unless (&allowed('psa',&host_domain($server))) { return 'refused'; }
2101: unless ($text=~/\w/) { $text=''; }
2102: return &reply('setannounce:'.&escape($text),$server);
2103: }
2104:
2105: sub getannounce {
2106:
2107: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
2108: my $announcement='';
2109: while (my $line = <$fh>) { $announcement .= $line; }
2110: close($fh);
2111: if ($announcement=~/\w/) {
2112: return
2113: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
2114: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
2115: } else {
2116: return '';
2117: }
2118: } else {
2119: return '';
2120: }
2121: }
2122:
2123: # ---------------------------------------------------------- Course ID routines
2124: # Deal with domain's nohist_courseid.db files
2125: #
2126:
2127: sub courseidput {
2128: my ($domain,$what,$coursehome)=@_;
2129: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
2130: }
2131:
2132: sub courseiddump {
2133: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref,$typefilter,$regexp_ok)=@_;
2134: my %returnhash=();
2135: unless ($domfilter) { $domfilter=''; }
2136: my %libserv = &all_library();
2137: foreach my $tryserver (keys(%libserv)) {
2138: if ( ( $hostidflag == 1
2139: && grep(/^\Q$tryserver\E$/,@{$hostidref}) )
2140: || (!defined($hostidflag)) ) {
2141:
2142: if ($domfilter eq ''
2143: || (&host_domain($tryserver) eq $domfilter)) {
2144: foreach my $line (
2145: split(/\&/,&reply('courseiddump:'.&host_domain($tryserver).':'.
2146: $sincefilter.':'.&escape($descfilter).':'.
2147: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter).':'.&escape($typefilter).':'.&escape($regexp_ok),
2148: $tryserver))) {
2149: my ($key,$value)=split(/\=/,$line,2);
2150: if (($key) && ($value)) {
2151: $returnhash{&unescape($key)}=$value;
2152: }
2153: }
2154: }
2155: }
2156: }
2157: return %returnhash;
2158: }
2159:
2160: # ---------------------------------------------------------- DC e-mail
2161:
2162: sub dcmailput {
2163: my ($domain,$msgid,$message,$server)=@_;
2164: my $status = &Apache::lonnet::critical(
2165: 'dcmailput:'.$domain.':'.&escape($msgid).'='.
2166: &escape($message),$server);
2167: return $status;
2168: }
2169:
2170: sub dcmaildump {
2171: my ($dom,$startdate,$enddate,$senders) = @_;
2172: my %returnhash=();
2173: if (exists($domain_primary{$dom})) {
2174: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
2175: &escape($enddate).':';
2176: my @esc_senders=map { &escape($_)} @$senders;
2177: $cmd.=&escape(join('&',@esc_senders));
2178: foreach my $line (split(/\&/,&reply($cmd,$domain_primary{$dom}))) {
2179: my ($key,$value) = split(/\=/,$line,2);
2180: if (($key) && ($value)) {
2181: $returnhash{&unescape($key)} = &unescape($value);
2182: }
2183: }
2184: }
2185: return %returnhash;
2186: }
2187: # ---------------------------------------------------------- Domain roles
2188:
2189: sub get_domain_roles {
2190: my ($dom,$roles,$startdate,$enddate)=@_;
2191: if (undef($startdate) || $startdate eq '') {
2192: $startdate = '.';
2193: }
2194: if (undef($enddate) || $enddate eq '') {
2195: $enddate = '.';
2196: }
2197: my $rolelist = join(':',@{$roles});
2198: my %personnel = ();
2199:
2200: my %servers = &get_servers($dom,'library');
2201: foreach my $tryserver (keys(%servers)) {
2202: %{$personnel{$tryserver}}=();
2203: foreach my $line (split(/\&/,&reply('domrolesdump:'.$dom.':'.
2204: &escape($startdate).':'.
2205: &escape($enddate).':'.
2206: &escape($rolelist), $tryserver))) {
2207: my ($key,$value) = split(/\=/,$line,2);
2208: if (($key) && ($value)) {
2209: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
2210: }
2211: }
2212: }
2213: return %personnel;
2214: }
2215:
2216: # ----------------------------------------------------------- Check out an item
2217:
2218: sub get_first_access {
2219: my ($type,$argsymb)=@_;
2220: my ($symb,$courseid,$udom,$uname)=&whichuser();
2221: if ($argsymb) { $symb=$argsymb; }
2222: my ($map,$id,$res)=&decode_symb($symb);
2223: if ($type eq 'map') {
2224: $res=&symbread($map);
2225: } else {
2226: $res=$symb;
2227: }
2228: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
2229: return $times{"$courseid\0$res"};
2230: }
2231:
2232: sub set_first_access {
2233: my ($type)=@_;
2234: my ($symb,$courseid,$udom,$uname)=&whichuser();
2235: my ($map,$id,$res)=&decode_symb($symb);
2236: if ($type eq 'map') {
2237: $res=&symbread($map);
2238: } else {
2239: $res=$symb;
2240: }
2241: my $firstaccess=&get_first_access($type,$symb);
2242: if (!$firstaccess) {
2243: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
2244: }
2245: return 'already_set';
2246: }
2247:
2248: sub checkout {
2249: my ($symb,$tuname,$tudom,$tcrsid)=@_;
2250: my $now=time;
2251: my $lonhost=$perlvar{'lonHostID'};
2252: my $infostr=&escape(
2253: 'CHECKOUTTOKEN&'.
2254: $tuname.'&'.
2255: $tudom.'&'.
2256: $tcrsid.'&'.
2257: $symb.'&'.
2258: $now.'&'.$ENV{'REMOTE_ADDR'});
2259: my $token=&reply('tmpput:'.$infostr,$lonhost);
2260: if ($token=~/^error\:/) {
2261: &logthis("<font color=\"blue\">WARNING: ".
2262: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
2263: "</font>");
2264: return '';
2265: }
2266:
2267: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
2268: $token=~tr/a-z/A-Z/;
2269:
2270: my %infohash=('resource.0.outtoken' => $token,
2271: 'resource.0.checkouttime' => $now,
2272: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
2273:
2274: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2275: return '';
2276: } else {
2277: &logthis("<font color=\"blue\">WARNING: ".
2278: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
2279: "</font>");
2280: }
2281:
2282: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2283: &escape('Checkout '.$infostr.' - '.
2284: $token)) ne 'ok') {
2285: return '';
2286: } else {
2287: &logthis("<font color=\"blue\">WARNING: ".
2288: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
2289: "</font>");
2290: }
2291: return $token;
2292: }
2293:
2294: # ------------------------------------------------------------ Check in an item
2295:
2296: sub checkin {
2297: my $token=shift;
2298: my $now=time;
2299: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2300: $lonhost=~tr/A-Z/a-z/;
2301: my $dtoken=$ta.'_'.&hostname($lonhost).'_'.$tb;
2302: $dtoken=~s/\W/\_/g;
2303: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2304: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2305:
2306: unless (($tuname) && ($tudom)) {
2307: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2308: return '';
2309: }
2310:
2311: unless (&allowed('mgr',$tcrsid)) {
2312: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2313: $env{'user.name'}.' - '.$env{'user.domain'});
2314: return '';
2315: }
2316:
2317: my %infohash=('resource.0.intoken' => $token,
2318: 'resource.0.checkintime' => $now,
2319: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2320:
2321: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2322: return '';
2323: }
2324:
2325: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2326: &escape('Checkin - '.$token)) ne 'ok') {
2327: return '';
2328: }
2329:
2330: return ($symb,$tuname,$tudom,$tcrsid);
2331: }
2332:
2333: # --------------------------------------------- Set Expire Date for Spreadsheet
2334:
2335: sub expirespread {
2336: my ($uname,$udom,$stype,$usymb)=@_;
2337: my $cid=$env{'request.course.id'};
2338: if ($cid) {
2339: my $now=time;
2340: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2341: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2342: $env{'course.'.$cid.'.num'}.
2343: ':nohist_expirationdates:'.
2344: &escape($key).'='.$now,
2345: $env{'course.'.$cid.'.home'})
2346: }
2347: return 'ok';
2348: }
2349:
2350: # ----------------------------------------------------- Devalidate Spreadsheets
2351:
2352: sub devalidate {
2353: my ($symb,$uname,$udom)=@_;
2354: my $cid=$env{'request.course.id'};
2355: if ($cid) {
2356: # delete the stored spreadsheets for
2357: # - the student level sheet of this user in course's homespace
2358: # - the assessment level sheet for this resource
2359: # for this user in user's homespace
2360: # - current conditional state info
2361: my $key=$uname.':'.$udom.':';
2362: my $status=
2363: &del('nohist_calculatedsheets',
2364: [$key.'studentcalc:'],
2365: $env{'course.'.$cid.'.domain'},
2366: $env{'course.'.$cid.'.num'})
2367: .' '.
2368: &del('nohist_calculatedsheets_'.$cid,
2369: [$key.'assesscalc:'.$symb],$udom,$uname);
2370: unless ($status eq 'ok ok') {
2371: &logthis('Could not devalidate spreadsheet '.
2372: $uname.' at '.$udom.' for '.
2373: $symb.': '.$status);
2374: }
2375: &delenv('user.state.'.$cid);
2376: }
2377: }
2378:
2379: sub get_scalar {
2380: my ($string,$end) = @_;
2381: my $value;
2382: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2383: $value = $1;
2384: } elsif ($$string =~ s/^([^&]*?)&//) {
2385: $value = $1;
2386: }
2387: return &unescape($value);
2388: }
2389:
2390: sub array2str {
2391: my (@array) = @_;
2392: my $result=&arrayref2str(\@array);
2393: $result=~s/^__ARRAY_REF__//;
2394: $result=~s/__END_ARRAY_REF__$//;
2395: return $result;
2396: }
2397:
2398: sub arrayref2str {
2399: my ($arrayref) = @_;
2400: my $result='__ARRAY_REF__';
2401: foreach my $elem (@$arrayref) {
2402: if(ref($elem) eq 'ARRAY') {
2403: $result.=&arrayref2str($elem).'&';
2404: } elsif(ref($elem) eq 'HASH') {
2405: $result.=&hashref2str($elem).'&';
2406: } elsif(ref($elem)) {
2407: #print("Got a ref of ".(ref($elem))." skipping.");
2408: } else {
2409: $result.=&escape($elem).'&';
2410: }
2411: }
2412: $result=~s/\&$//;
2413: $result .= '__END_ARRAY_REF__';
2414: return $result;
2415: }
2416:
2417: sub hash2str {
2418: my (%hash) = @_;
2419: my $result=&hashref2str(\%hash);
2420: $result=~s/^__HASH_REF__//;
2421: $result=~s/__END_HASH_REF__$//;
2422: return $result;
2423: }
2424:
2425: sub hashref2str {
2426: my ($hashref)=@_;
2427: my $result='__HASH_REF__';
2428: foreach my $key (sort(keys(%$hashref))) {
2429: if (ref($key) eq 'ARRAY') {
2430: $result.=&arrayref2str($key).'=';
2431: } elsif (ref($key) eq 'HASH') {
2432: $result.=&hashref2str($key).'=';
2433: } elsif (ref($key)) {
2434: $result.='=';
2435: #print("Got a ref of ".(ref($key))." skipping.");
2436: } else {
2437: if ($key) {$result.=&escape($key).'=';} else { last; }
2438: }
2439:
2440: if(ref($hashref->{$key}) eq 'ARRAY') {
2441: $result.=&arrayref2str($hashref->{$key}).'&';
2442: } elsif(ref($hashref->{$key}) eq 'HASH') {
2443: $result.=&hashref2str($hashref->{$key}).'&';
2444: } elsif(ref($hashref->{$key})) {
2445: $result.='&';
2446: #print("Got a ref of ".(ref($hashref->{$key}))." skipping.");
2447: } else {
2448: $result.=&escape($hashref->{$key}).'&';
2449: }
2450: }
2451: $result=~s/\&$//;
2452: $result .= '__END_HASH_REF__';
2453: return $result;
2454: }
2455:
2456: sub str2hash {
2457: my ($string)=@_;
2458: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2459: return %$hash;
2460: }
2461:
2462: sub str2hashref {
2463: my ($string) = @_;
2464:
2465: my %hash;
2466:
2467: if($string !~ /^__HASH_REF__/) {
2468: if (! ($string eq '' || !defined($string))) {
2469: $hash{'error'}='Not hash reference';
2470: }
2471: return (\%hash, $string);
2472: }
2473:
2474: $string =~ s/^__HASH_REF__//;
2475:
2476: while($string !~ /^__END_HASH_REF__/) {
2477: #key
2478: my $key='';
2479: if($string =~ /^__HASH_REF__/) {
2480: ($key, $string)=&str2hashref($string);
2481: if(defined($key->{'error'})) {
2482: $hash{'error'}='Bad data';
2483: return (\%hash, $string);
2484: }
2485: } elsif($string =~ /^__ARRAY_REF__/) {
2486: ($key, $string)=&str2arrayref($string);
2487: if($key->[0] eq 'Array reference error') {
2488: $hash{'error'}='Bad data';
2489: return (\%hash, $string);
2490: }
2491: } else {
2492: $string =~ s/^(.*?)=//;
2493: $key=&unescape($1);
2494: }
2495: $string =~ s/^=//;
2496:
2497: #value
2498: my $value='';
2499: if($string =~ /^__HASH_REF__/) {
2500: ($value, $string)=&str2hashref($string);
2501: if(defined($value->{'error'})) {
2502: $hash{'error'}='Bad data';
2503: return (\%hash, $string);
2504: }
2505: } elsif($string =~ /^__ARRAY_REF__/) {
2506: ($value, $string)=&str2arrayref($string);
2507: if($value->[0] eq 'Array reference error') {
2508: $hash{'error'}='Bad data';
2509: return (\%hash, $string);
2510: }
2511: } else {
2512: $value=&get_scalar(\$string,'__END_HASH_REF__');
2513: }
2514: $string =~ s/^&//;
2515:
2516: $hash{$key}=$value;
2517: }
2518:
2519: $string =~ s/^__END_HASH_REF__//;
2520:
2521: return (\%hash, $string);
2522: }
2523:
2524: sub str2array {
2525: my ($string)=@_;
2526: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2527: return @$array;
2528: }
2529:
2530: sub str2arrayref {
2531: my ($string) = @_;
2532: my @array;
2533:
2534: if($string !~ /^__ARRAY_REF__/) {
2535: if (! ($string eq '' || !defined($string))) {
2536: $array[0]='Array reference error';
2537: }
2538: return (\@array, $string);
2539: }
2540:
2541: $string =~ s/^__ARRAY_REF__//;
2542:
2543: while($string !~ /^__END_ARRAY_REF__/) {
2544: my $value='';
2545: if($string =~ /^__HASH_REF__/) {
2546: ($value, $string)=&str2hashref($string);
2547: if(defined($value->{'error'})) {
2548: $array[0] ='Array reference error';
2549: return (\@array, $string);
2550: }
2551: } elsif($string =~ /^__ARRAY_REF__/) {
2552: ($value, $string)=&str2arrayref($string);
2553: if($value->[0] eq 'Array reference error') {
2554: $array[0] ='Array reference error';
2555: return (\@array, $string);
2556: }
2557: } else {
2558: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2559: }
2560: $string =~ s/^&//;
2561:
2562: push(@array, $value);
2563: }
2564:
2565: $string =~ s/^__END_ARRAY_REF__//;
2566:
2567: return (\@array, $string);
2568: }
2569:
2570: # -------------------------------------------------------------------Temp Store
2571:
2572: sub tmpreset {
2573: my ($symb,$namespace,$domain,$stuname) = @_;
2574: if (!$symb) {
2575: $symb=&symbread();
2576: if (!$symb) { $symb= $env{'request.url'}; }
2577: }
2578: $symb=escape($symb);
2579:
2580: if (!$namespace) { $namespace=$env{'request.state'}; }
2581: $namespace=~s/\//\_/g;
2582: $namespace=~s/\W//g;
2583:
2584: if (!$domain) { $domain=$env{'user.domain'}; }
2585: if (!$stuname) { $stuname=$env{'user.name'}; }
2586: if ($domain eq 'public' && $stuname eq 'public') {
2587: $stuname=$ENV{'REMOTE_ADDR'};
2588: }
2589: my $path=$perlvar{'lonDaemons'}.'/tmp';
2590: my %hash;
2591: if (tie(%hash,'GDBM_File',
2592: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2593: &GDBM_WRCREAT(),0640)) {
2594: foreach my $key (keys %hash) {
2595: if ($key=~ /:$symb/) {
2596: delete($hash{$key});
2597: }
2598: }
2599: }
2600: }
2601:
2602: sub tmpstore {
2603: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2604:
2605: if (!$symb) {
2606: $symb=&symbread();
2607: if (!$symb) { $symb= $env{'request.url'}; }
2608: }
2609: $symb=escape($symb);
2610:
2611: if (!$namespace) {
2612: # I don't think we would ever want to store this for a course.
2613: # it seems this will only be used if we don't have a course.
2614: #$namespace=$env{'request.course.id'};
2615: #if (!$namespace) {
2616: $namespace=$env{'request.state'};
2617: #}
2618: }
2619: $namespace=~s/\//\_/g;
2620: $namespace=~s/\W//g;
2621: if (!$domain) { $domain=$env{'user.domain'}; }
2622: if (!$stuname) { $stuname=$env{'user.name'}; }
2623: if ($domain eq 'public' && $stuname eq 'public') {
2624: $stuname=$ENV{'REMOTE_ADDR'};
2625: }
2626: my $now=time;
2627: my %hash;
2628: my $path=$perlvar{'lonDaemons'}.'/tmp';
2629: if (tie(%hash,'GDBM_File',
2630: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2631: &GDBM_WRCREAT(),0640)) {
2632: $hash{"version:$symb"}++;
2633: my $version=$hash{"version:$symb"};
2634: my $allkeys='';
2635: foreach my $key (keys(%$storehash)) {
2636: $allkeys.=$key.':';
2637: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2638: }
2639: $hash{"$version:$symb:timestamp"}=$now;
2640: $allkeys.='timestamp';
2641: $hash{"$version:keys:$symb"}=$allkeys;
2642: if (untie(%hash)) {
2643: return 'ok';
2644: } else {
2645: return "error:$!";
2646: }
2647: } else {
2648: return "error:$!";
2649: }
2650: }
2651:
2652: # -----------------------------------------------------------------Temp Restore
2653:
2654: sub tmprestore {
2655: my ($symb,$namespace,$domain,$stuname) = @_;
2656:
2657: if (!$symb) {
2658: $symb=&symbread();
2659: if (!$symb) { $symb= $env{'request.url'}; }
2660: }
2661: $symb=escape($symb);
2662:
2663: if (!$namespace) { $namespace=$env{'request.state'}; }
2664:
2665: if (!$domain) { $domain=$env{'user.domain'}; }
2666: if (!$stuname) { $stuname=$env{'user.name'}; }
2667: if ($domain eq 'public' && $stuname eq 'public') {
2668: $stuname=$ENV{'REMOTE_ADDR'};
2669: }
2670: my %returnhash;
2671: $namespace=~s/\//\_/g;
2672: $namespace=~s/\W//g;
2673: my %hash;
2674: my $path=$perlvar{'lonDaemons'}.'/tmp';
2675: if (tie(%hash,'GDBM_File',
2676: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2677: &GDBM_READER(),0640)) {
2678: my $version=$hash{"version:$symb"};
2679: $returnhash{'version'}=$version;
2680: my $scope;
2681: for ($scope=1;$scope<=$version;$scope++) {
2682: my $vkeys=$hash{"$scope:keys:$symb"};
2683: my @keys=split(/:/,$vkeys);
2684: my $key;
2685: $returnhash{"$scope:keys"}=$vkeys;
2686: foreach $key (@keys) {
2687: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2688: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2689: }
2690: }
2691: if (!(untie(%hash))) {
2692: return "error:$!";
2693: }
2694: } else {
2695: return "error:$!";
2696: }
2697: return %returnhash;
2698: }
2699:
2700: # ----------------------------------------------------------------------- Store
2701:
2702: sub store {
2703: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2704: my $home='';
2705:
2706: if ($stuname) { $home=&homeserver($stuname,$domain); }
2707:
2708: $symb=&symbclean($symb);
2709: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2710:
2711: if (!$domain) { $domain=$env{'user.domain'}; }
2712: if (!$stuname) { $stuname=$env{'user.name'}; }
2713:
2714: &devalidate($symb,$stuname,$domain);
2715:
2716: $symb=escape($symb);
2717: if (!$namespace) {
2718: unless ($namespace=$env{'request.course.id'}) {
2719: return '';
2720: }
2721: }
2722: if (!$home) { $home=$env{'user.home'}; }
2723:
2724: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2725: $$storehash{'host'}=$perlvar{'lonHostID'};
2726:
2727: my $namevalue='';
2728: foreach my $key (keys(%$storehash)) {
2729: $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
2730: }
2731: $namevalue=~s/\&$//;
2732: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2733: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2734: }
2735:
2736: # -------------------------------------------------------------- Critical Store
2737:
2738: sub cstore {
2739: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2740: my $home='';
2741:
2742: if ($stuname) { $home=&homeserver($stuname,$domain); }
2743:
2744: $symb=&symbclean($symb);
2745: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2746:
2747: if (!$domain) { $domain=$env{'user.domain'}; }
2748: if (!$stuname) { $stuname=$env{'user.name'}; }
2749:
2750: &devalidate($symb,$stuname,$domain);
2751:
2752: $symb=escape($symb);
2753: if (!$namespace) {
2754: unless ($namespace=$env{'request.course.id'}) {
2755: return '';
2756: }
2757: }
2758: if (!$home) { $home=$env{'user.home'}; }
2759:
2760: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2761: $$storehash{'host'}=$perlvar{'lonHostID'};
2762:
2763: my $namevalue='';
2764: foreach my $key (keys(%$storehash)) {
2765: $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
2766: }
2767: $namevalue=~s/\&$//;
2768: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2769: return critical
2770: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2771: }
2772:
2773: # --------------------------------------------------------------------- Restore
2774:
2775: sub restore {
2776: my ($symb,$namespace,$domain,$stuname) = @_;
2777: my $home='';
2778:
2779: if ($stuname) { $home=&homeserver($stuname,$domain); }
2780:
2781: if (!$symb) {
2782: unless ($symb=escape(&symbread())) { return ''; }
2783: } else {
2784: $symb=&escape(&symbclean($symb));
2785: }
2786: if (!$namespace) {
2787: unless ($namespace=$env{'request.course.id'}) {
2788: return '';
2789: }
2790: }
2791: if (!$domain) { $domain=$env{'user.domain'}; }
2792: if (!$stuname) { $stuname=$env{'user.name'}; }
2793: if (!$home) { $home=$env{'user.home'}; }
2794: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2795:
2796: my %returnhash=();
2797: foreach my $line (split(/\&/,$answer)) {
2798: my ($name,$value)=split(/\=/,$line);
2799: $returnhash{&unescape($name)}=&thaw_unescape($value);
2800: }
2801: my $version;
2802: for ($version=1;$version<=$returnhash{'version'};$version++) {
2803: foreach my $item (split(/\:/,$returnhash{$version.':keys'})) {
2804: $returnhash{$item}=$returnhash{$version.':'.$item};
2805: }
2806: }
2807: return %returnhash;
2808: }
2809:
2810: # ---------------------------------------------------------- Course Description
2811:
2812: sub coursedescription {
2813: my ($courseid,$args)=@_;
2814: $courseid=~s/^\///;
2815: $courseid=~s/\_/\//g;
2816: my ($cdomain,$cnum)=split(/\//,$courseid);
2817: my $chome=&homeserver($cnum,$cdomain);
2818: my $normalid=$cdomain.'_'.$cnum;
2819: # need to always cache even if we get errors otherwise we keep
2820: # trying and trying and trying to get the course description.
2821: my %envhash=();
2822: my %returnhash=();
2823:
2824: my $expiretime=600;
2825: if ($env{'request.course.id'} eq $normalid) {
2826: $expiretime=120;
2827: }
2828:
2829: my $prefix='course.'.$cdomain.'_'.$cnum.'.';
2830: if (!$args->{'freshen_cache'}
2831: && ((time-$env{$prefix.'last_cache'}) < $expiretime) ) {
2832: foreach my $key (keys(%env)) {
2833: next if ($key !~ /^\Q$prefix\E(.*)/);
2834: my ($setting) = $1;
2835: $returnhash{$setting} = $env{$key};
2836: }
2837: return %returnhash;
2838: }
2839:
2840: # get the data agin
2841: if (!$args->{'one_time'}) {
2842: $envhash{'course.'.$normalid.'.last_cache'}=time;
2843: }
2844:
2845: if ($chome ne 'no_host') {
2846: %returnhash=&dump('environment',$cdomain,$cnum);
2847: if (!exists($returnhash{'con_lost'})) {
2848: $returnhash{'home'}= $chome;
2849: $returnhash{'domain'} = $cdomain;
2850: $returnhash{'num'} = $cnum;
2851: if (!defined($returnhash{'type'})) {
2852: $returnhash{'type'} = 'Course';
2853: }
2854: while (my ($name,$value) = each %returnhash) {
2855: $envhash{'course.'.$normalid.'.'.$name}=$value;
2856: }
2857: $returnhash{'url'}=&clutter($returnhash{'url'});
2858: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2859: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2860: $envhash{'course.'.$normalid.'.home'}=$chome;
2861: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2862: $envhash{'course.'.$normalid.'.num'}=$cnum;
2863: }
2864: }
2865: if (!$args->{'one_time'}) {
2866: &appenv(%envhash);
2867: }
2868: return %returnhash;
2869: }
2870:
2871: # -------------------------------------------------See if a user is privileged
2872:
2873: sub privileged {
2874: my ($username,$domain)=@_;
2875: my $rolesdump=&reply("dump:$domain:$username:roles",
2876: &homeserver($username,$domain));
2877: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2878: my $now=time;
2879: if ($rolesdump ne '') {
2880: foreach my $entry (split(/&/,$rolesdump)) {
2881: if ($entry!~/^rolesdef_/) {
2882: my ($area,$role)=split(/=/,$entry);
2883: $area=~s/\_\w\w$//;
2884: my ($trole,$tend,$tstart)=split(/_/,$role);
2885: if (($trole eq 'dc') || ($trole eq 'su')) {
2886: my $active=1;
2887: if ($tend) {
2888: if ($tend<$now) { $active=0; }
2889: }
2890: if ($tstart) {
2891: if ($tstart>$now) { $active=0; }
2892: }
2893: if ($active) { return 1; }
2894: }
2895: }
2896: }
2897: }
2898: return 0;
2899: }
2900:
2901: # -------------------------------------------------------- Get user privileges
2902:
2903: sub rolesinit {
2904: my ($domain,$username,$authhost)=@_;
2905: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2906: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2907: my %allroles=();
2908: my %allgroups=();
2909: my $now=time;
2910: my %userroles = ('user.login.time' => $now);
2911: my $group_privs;
2912:
2913: if ($rolesdump ne '') {
2914: foreach my $entry (split(/&/,$rolesdump)) {
2915: if ($entry!~/^rolesdef_/) {
2916: my ($area,$role)=split(/=/,$entry);
2917: $area=~s/\_\w\w$//;
2918: my ($trole,$tend,$tstart,$group_privs);
2919: if ($role=~/^cr/) {
2920: if ($role=~m|^(cr/$match_domain/$match_username/[a-zA-Z0-9]+)_(.*)$|) {
2921: ($trole,my $trest)=($role=~m|^(cr/$match_domain/$match_username/[a-zA-Z0-9]+)_(.*)$|);
2922: ($tend,$tstart)=split('_',$trest);
2923: } else {
2924: $trole=$role;
2925: }
2926: } elsif ($role =~ m|^gr/|) {
2927: ($trole,$tend,$tstart) = split(/_/,$role);
2928: ($trole,$group_privs) = split(/\//,$trole);
2929: $group_privs = &unescape($group_privs);
2930: } else {
2931: ($trole,$tend,$tstart)=split(/_/,$role);
2932: }
2933: my %new_role = &set_arearole($trole,$area,$tstart,$tend,$domain,
2934: $username);
2935: @userroles{keys(%new_role)} = @new_role{keys(%new_role)};
2936: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2937: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2938: if (($area ne '') && ($trole ne '')) {
2939: my $spec=$trole.'.'.$area;
2940: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2941: if ($trole =~ /^cr\//) {
2942: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2943: } elsif ($trole eq 'gr') {
2944: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
2945: } else {
2946: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2947: }
2948: }
2949: }
2950: }
2951: my ($author,$adv) = &set_userprivs(\%userroles,\%allroles,\%allgroups);
2952: $userroles{'user.adv'} = $adv;
2953: $userroles{'user.author'} = $author;
2954: $env{'user.adv'}=$adv;
2955: }
2956: return \%userroles;
2957: }
2958:
2959: sub set_arearole {
2960: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2961: # log the associated role with the area
2962: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2963: return ('user.role.'.$trole.'.'.$area => $tstart.'.'.$tend);
2964: }
2965:
2966: sub custom_roleprivs {
2967: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2968: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2969: my $homsvr=homeserver($rauthor,$rdomain);
2970: if (&hostname($homsvr) ne '') {
2971: my ($rdummy,$roledef)=
2972: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2973: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2974: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2975: if (defined($syspriv)) {
2976: $$allroles{'cm./'}.=':'.$syspriv;
2977: $$allroles{$spec.'./'}.=':'.$syspriv;
2978: }
2979: if ($tdomain ne '') {
2980: if (defined($dompriv)) {
2981: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2982: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2983: }
2984: if (($trest ne '') && (defined($coursepriv))) {
2985: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2986: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2987: }
2988: }
2989: }
2990: }
2991: }
2992:
2993: sub group_roleprivs {
2994: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
2995: my $access = 1;
2996: my $now = time;
2997: if (($tend!=0) && ($tend<$now)) { $access = 0; }
2998: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
2999: if ($access) {
3000: my ($course,$group) = ($area =~ m|(/$match_domain/$match_courseid)/([^/]+)$|);
3001: $$allgroups{$course}{$group} .=':'.$group_privs;
3002: }
3003: }
3004:
3005: sub standard_roleprivs {
3006: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
3007: if (defined($pr{$trole.':s'})) {
3008: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
3009: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
3010: }
3011: if ($tdomain ne '') {
3012: if (defined($pr{$trole.':d'})) {
3013: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
3014: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
3015: }
3016: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
3017: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
3018: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
3019: }
3020: }
3021: }
3022:
3023: sub set_userprivs {
3024: my ($userroles,$allroles,$allgroups) = @_;
3025: my $author=0;
3026: my $adv=0;
3027: my %grouproles = ();
3028: if (keys(%{$allgroups}) > 0) {
3029: foreach my $role (keys %{$allroles}) {
3030: my ($trole,$area,$sec,$extendedarea);
3031: if ($role =~ m-^(\w+|cr/$match_domain/$match_username/\w+)\.(/$match_domain/$match_courseid)(/?\w*)-) {
3032: $trole = $1;
3033: $area = $2;
3034: $sec = $3;
3035: $extendedarea = $area.$sec;
3036: if (exists($$allgroups{$area})) {
3037: foreach my $group (keys(%{$$allgroups{$area}})) {
3038: my $spec = $trole.'.'.$extendedarea;
3039: $grouproles{$spec.'.'.$area.'/'.$group} =
3040: $$allgroups{$area}{$group};
3041: }
3042: }
3043: }
3044: }
3045: }
3046: foreach my $group (keys(%grouproles)) {
3047: $$allroles{$group} = $grouproles{$group};
3048: }
3049: foreach my $role (keys(%{$allroles})) {
3050: my %thesepriv;
3051: if (($role=~/^au/) || ($role=~/^ca/)) { $author=1; }
3052: foreach my $item (split(/:/,$$allroles{$role})) {
3053: if ($item ne '') {
3054: my ($privilege,$restrictions)=split(/&/,$item);
3055: if ($restrictions eq '') {
3056: $thesepriv{$privilege}='F';
3057: } elsif ($thesepriv{$privilege} ne 'F') {
3058: $thesepriv{$privilege}.=$restrictions;
3059: }
3060: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
3061: }
3062: }
3063: my $thesestr='';
3064: foreach my $priv (keys(%thesepriv)) {
3065: $thesestr.=':'.$priv.'&'.$thesepriv{$priv};
3066: }
3067: $userroles->{'user.priv.'.$role} = $thesestr;
3068: }
3069: return ($author,$adv);
3070: }
3071:
3072: # --------------------------------------------------------------- get interface
3073:
3074: sub get {
3075: my ($namespace,$storearr,$udomain,$uname)=@_;
3076: my $items='';
3077: foreach my $item (@$storearr) {
3078: $items.=&escape($item).'&';
3079: }
3080: $items=~s/\&$//;
3081: if (!$udomain) { $udomain=$env{'user.domain'}; }
3082: if (!$uname) { $uname=$env{'user.name'}; }
3083: my $uhome=&homeserver($uname,$udomain);
3084:
3085: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
3086: my @pairs=split(/\&/,$rep);
3087: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
3088: return @pairs;
3089: }
3090: my %returnhash=();
3091: my $i=0;
3092: foreach my $item (@$storearr) {
3093: $returnhash{$item}=&thaw_unescape($pairs[$i]);
3094: $i++;
3095: }
3096: return %returnhash;
3097: }
3098:
3099: # --------------------------------------------------------------- del interface
3100:
3101: sub del {
3102: my ($namespace,$storearr,$udomain,$uname)=@_;
3103: my $items='';
3104: foreach my $item (@$storearr) {
3105: $items.=&escape($item).'&';
3106: }
3107: $items=~s/\&$//;
3108: if (!$udomain) { $udomain=$env{'user.domain'}; }
3109: if (!$uname) { $uname=$env{'user.name'}; }
3110: my $uhome=&homeserver($uname,$udomain);
3111:
3112: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
3113: }
3114:
3115: # -------------------------------------------------------------- dump interface
3116:
3117: sub dump {
3118: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
3119: if (!$udomain) { $udomain=$env{'user.domain'}; }
3120: if (!$uname) { $uname=$env{'user.name'}; }
3121: my $uhome=&homeserver($uname,$udomain);
3122: if ($regexp) {
3123: $regexp=&escape($regexp);
3124: } else {
3125: $regexp='.';
3126: }
3127: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
3128: my @pairs=split(/\&/,$rep);
3129: my %returnhash=();
3130: foreach my $item (@pairs) {
3131: my ($key,$value)=split(/=/,$item,2);
3132: $key = &unescape($key);
3133: next if ($key =~ /^error: 2 /);
3134: $returnhash{$key}=&thaw_unescape($value);
3135: }
3136: return %returnhash;
3137: }
3138:
3139: # --------------------------------------------------------- dumpstore interface
3140:
3141: sub dumpstore {
3142: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
3143: if (!$udomain) { $udomain=$env{'user.domain'}; }
3144: if (!$uname) { $uname=$env{'user.name'}; }
3145: my $uhome=&homeserver($uname,$udomain);
3146: if ($regexp) {
3147: $regexp=&escape($regexp);
3148: } else {
3149: $regexp='.';
3150: }
3151: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
3152: my @pairs=split(/\&/,$rep);
3153: my %returnhash=();
3154: foreach my $item (@pairs) {
3155: my ($key,$value)=split(/=/,$item,2);
3156: next if ($key =~ /^error: 2 /);
3157: $returnhash{$key}=&thaw_unescape($value);
3158: }
3159: return %returnhash;
3160: }
3161:
3162: # -------------------------------------------------------------- keys interface
3163:
3164: sub getkeys {
3165: my ($namespace,$udomain,$uname)=@_;
3166: if (!$udomain) { $udomain=$env{'user.domain'}; }
3167: if (!$uname) { $uname=$env{'user.name'}; }
3168: my $uhome=&homeserver($uname,$udomain);
3169: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
3170: my @keyarray=();
3171: foreach my $key (split(/\&/,$rep)) {
3172: next if ($key =~ /^error: 2 /);
3173: push(@keyarray,&unescape($key));
3174: }
3175: return @keyarray;
3176: }
3177:
3178: # --------------------------------------------------------------- currentdump
3179: sub currentdump {
3180: my ($courseid,$sdom,$sname)=@_;
3181: $courseid = $env{'request.course.id'} if (! defined($courseid));
3182: $sdom = $env{'user.domain'} if (! defined($sdom));
3183: $sname = $env{'user.name'} if (! defined($sname));
3184: my $uhome = &homeserver($sname,$sdom);
3185: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
3186: return if ($rep =~ /^(error:|no_such_host)/);
3187: #
3188: my %returnhash=();
3189: #
3190: if ($rep eq "unknown_cmd") {
3191: # an old lond will not know currentdump
3192: # Do a dump and make it look like a currentdump
3193: my @tmp = &dumpstore($courseid,$sdom,$sname,'.');
3194: return if ($tmp[0] =~ /^(error:|no_such_host)/);
3195: my %hash = @tmp;
3196: @tmp=();
3197: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
3198: } else {
3199: my @pairs=split(/\&/,$rep);
3200: foreach my $pair (@pairs) {
3201: my ($key,$value)=split(/=/,$pair,2);
3202: my ($symb,$param) = split(/:/,$key);
3203: $returnhash{&unescape($symb)}->{&unescape($param)} =
3204: &thaw_unescape($value);
3205: }
3206: }
3207: return %returnhash;
3208: }
3209:
3210: sub convert_dump_to_currentdump{
3211: my %hash = %{shift()};
3212: my %returnhash;
3213: # Code ripped from lond, essentially. The only difference
3214: # here is the unescaping done by lonnet::dump(). Conceivably
3215: # we might run in to problems with parameter names =~ /^v\./
3216: while (my ($key,$value) = each(%hash)) {
3217: my ($v,$symb,$param) = split(/:/,$key);
3218: $symb = &unescape($symb);
3219: $param = &unescape($param);
3220: next if ($v eq 'version' || $symb eq 'keys');
3221: next if (exists($returnhash{$symb}) &&
3222: exists($returnhash{$symb}->{$param}) &&
3223: $returnhash{$symb}->{'v.'.$param} > $v);
3224: $returnhash{$symb}->{$param}=$value;
3225: $returnhash{$symb}->{'v.'.$param}=$v;
3226: }
3227: #
3228: # Remove all of the keys in the hashes which keep track of
3229: # the version of the parameter.
3230: while (my ($symb,$param_hash) = each(%returnhash)) {
3231: # use a foreach because we are going to delete from the hash.
3232: foreach my $key (keys(%$param_hash)) {
3233: delete($param_hash->{$key}) if ($key =~ /^v\./);
3234: }
3235: }
3236: return \%returnhash;
3237: }
3238:
3239: # ------------------------------------------------------ critical inc interface
3240:
3241: sub cinc {
3242: return &inc(@_,'critical');
3243: }
3244:
3245: # --------------------------------------------------------------- inc interface
3246:
3247: sub inc {
3248: my ($namespace,$store,$udomain,$uname,$critical) = @_;
3249: if (!$udomain) { $udomain=$env{'user.domain'}; }
3250: if (!$uname) { $uname=$env{'user.name'}; }
3251: my $uhome=&homeserver($uname,$udomain);
3252: my $items='';
3253: if (! ref($store)) {
3254: # got a single value, so use that instead
3255: $items = &escape($store).'=&';
3256: } elsif (ref($store) eq 'SCALAR') {
3257: $items = &escape($$store).'=&';
3258: } elsif (ref($store) eq 'ARRAY') {
3259: $items = join('=&',map {&escape($_);} @{$store});
3260: } elsif (ref($store) eq 'HASH') {
3261: while (my($key,$value) = each(%{$store})) {
3262: $items.= &escape($key).'='.&escape($value).'&';
3263: }
3264: }
3265: $items=~s/\&$//;
3266: if ($critical) {
3267: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
3268: } else {
3269: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
3270: }
3271: }
3272:
3273: # --------------------------------------------------------------- put interface
3274:
3275: sub put {
3276: my ($namespace,$storehash,$udomain,$uname)=@_;
3277: if (!$udomain) { $udomain=$env{'user.domain'}; }
3278: if (!$uname) { $uname=$env{'user.name'}; }
3279: my $uhome=&homeserver($uname,$udomain);
3280: my $items='';
3281: foreach my $item (keys(%$storehash)) {
3282: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3283: }
3284: $items=~s/\&$//;
3285: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3286: }
3287:
3288: # ------------------------------------------------------------ newput interface
3289:
3290: sub newput {
3291: my ($namespace,$storehash,$udomain,$uname)=@_;
3292: if (!$udomain) { $udomain=$env{'user.domain'}; }
3293: if (!$uname) { $uname=$env{'user.name'}; }
3294: my $uhome=&homeserver($uname,$udomain);
3295: my $items='';
3296: foreach my $key (keys(%$storehash)) {
3297: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3298: }
3299: $items=~s/\&$//;
3300: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
3301: }
3302:
3303: # --------------------------------------------------------- putstore interface
3304:
3305: sub putstore {
3306: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3307: if (!$udomain) { $udomain=$env{'user.domain'}; }
3308: if (!$uname) { $uname=$env{'user.name'}; }
3309: my $uhome=&homeserver($uname,$udomain);
3310: my $items='';
3311: foreach my $key (keys(%$storehash)) {
3312: $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
3313: }
3314: $items=~s/\&$//;
3315: my $esc_symb=&escape($symb);
3316: my $esc_v=&escape($version);
3317: my $reply =
3318: &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
3319: $uhome);
3320: if ($reply eq 'unknown_cmd') {
3321: # gfall back to way things use to be done
3322: return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
3323: $uname);
3324: }
3325: return $reply;
3326: }
3327:
3328: sub old_putstore {
3329: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3330: if (!$udomain) { $udomain=$env{'user.domain'}; }
3331: if (!$uname) { $uname=$env{'user.name'}; }
3332: my $uhome=&homeserver($uname,$udomain);
3333: my %newstorehash;
3334: foreach my $item (keys(%$storehash)) {
3335: my $key = $version.':'.&escape($symb).':'.$item;
3336: $newstorehash{$key} = $storehash->{$item};
3337: }
3338: my $items='';
3339: my %allitems = ();
3340: foreach my $item (keys(%newstorehash)) {
3341: if ($item =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
3342: my $key = $1.':keys:'.$2;
3343: $allitems{$key} .= $3.':';
3344: }
3345: $items.=$item.'='.&freeze_escape($newstorehash{$item}).'&';
3346: }
3347: foreach my $item (keys(%allitems)) {
3348: $allitems{$item} =~ s/\:$//;
3349: $items.= $item.'='.$allitems{$item}.'&';
3350: }
3351: $items=~s/\&$//;
3352: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3353: }
3354:
3355: # ------------------------------------------------------ critical put interface
3356:
3357: sub cput {
3358: my ($namespace,$storehash,$udomain,$uname)=@_;
3359: if (!$udomain) { $udomain=$env{'user.domain'}; }
3360: if (!$uname) { $uname=$env{'user.name'}; }
3361: my $uhome=&homeserver($uname,$udomain);
3362: my $items='';
3363: foreach my $item (keys(%$storehash)) {
3364: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3365: }
3366: $items=~s/\&$//;
3367: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
3368: }
3369:
3370: # -------------------------------------------------------------- eget interface
3371:
3372: sub eget {
3373: my ($namespace,$storearr,$udomain,$uname)=@_;
3374: my $items='';
3375: foreach my $item (@$storearr) {
3376: $items.=&escape($item).'&';
3377: }
3378: $items=~s/\&$//;
3379: if (!$udomain) { $udomain=$env{'user.domain'}; }
3380: if (!$uname) { $uname=$env{'user.name'}; }
3381: my $uhome=&homeserver($uname,$udomain);
3382: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3383: my @pairs=split(/\&/,$rep);
3384: my %returnhash=();
3385: my $i=0;
3386: foreach my $item (@$storearr) {
3387: $returnhash{$item}=&thaw_unescape($pairs[$i]);
3388: $i++;
3389: }
3390: return %returnhash;
3391: }
3392:
3393: # ------------------------------------------------------------ tmpput interface
3394: sub tmpput {
3395: my ($storehash,$server,$context)=@_;
3396: my $items='';
3397: foreach my $item (keys(%$storehash)) {
3398: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3399: }
3400: $items=~s/\&$//;
3401: if (defined($context)) {
3402: $items .= ':'.&escape($context);
3403: }
3404: return &reply("tmpput:$items",$server);
3405: }
3406:
3407: # ------------------------------------------------------------ tmpget interface
3408: sub tmpget {
3409: my ($token,$server)=@_;
3410: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3411: my $rep=&reply("tmpget:$token",$server);
3412: my %returnhash;
3413: foreach my $item (split(/\&/,$rep)) {
3414: my ($key,$value)=split(/=/,$item);
3415: $returnhash{&unescape($key)}=&thaw_unescape($value);
3416: }
3417: return %returnhash;
3418: }
3419:
3420: # ------------------------------------------------------------ tmpget interface
3421: sub tmpdel {
3422: my ($token,$server)=@_;
3423: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3424: return &reply("tmpdel:$token",$server);
3425: }
3426:
3427: # -------------------------------------------------- portfolio access checking
3428:
3429: sub portfolio_access {
3430: my ($requrl) = @_;
3431: my (undef,$udom,$unum,$file_name,$group) = &parse_portfolio_url($requrl);
3432: my $result = &get_portfolio_access($udom,$unum,$file_name,$group);
3433: if ($result) {
3434: my %setters;
3435: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3436: my ($startblock,$endblock) =
3437: &Apache::loncommon::blockcheck(\%setters,'port',$unum,$udom);
3438: if ($startblock && $endblock) {
3439: return 'B';
3440: }
3441: } else {
3442: my ($startblock,$endblock) =
3443: &Apache::loncommon::blockcheck(\%setters,'port');
3444: if ($startblock && $endblock) {
3445: return 'B';
3446: }
3447: }
3448: }
3449: if ($result eq 'ok') {
3450: return 'F';
3451: } elsif ($result =~ /^[^:]+:guest_/) {
3452: return 'A';
3453: }
3454: return '';
3455: }
3456:
3457: sub get_portfolio_access {
3458: my ($udom,$unum,$file_name,$group,$access_hash) = @_;
3459:
3460: if (!ref($access_hash)) {
3461: my $current_perms = &get_portfile_permissions($udom,$unum);
3462: my %access_controls = &get_access_controls($current_perms,$group,
3463: $file_name);
3464: $access_hash = $access_controls{$file_name};
3465: }
3466:
3467: my ($public,$guest,@domains,@users,@courses,@groups);
3468: my $now = time;
3469: if (ref($access_hash) eq 'HASH') {
3470: foreach my $key (keys(%{$access_hash})) {
3471: my ($num,$scope,$end,$start) = ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
3472: if ($start > $now) {
3473: next;
3474: }
3475: if ($end && $end<$now) {
3476: next;
3477: }
3478: if ($scope eq 'public') {
3479: $public = $key;
3480: last;
3481: } elsif ($scope eq 'guest') {
3482: $guest = $key;
3483: } elsif ($scope eq 'domains') {
3484: push(@domains,$key);
3485: } elsif ($scope eq 'users') {
3486: push(@users,$key);
3487: } elsif ($scope eq 'course') {
3488: push(@courses,$key);
3489: } elsif ($scope eq 'group') {
3490: push(@groups,$key);
3491: }
3492: }
3493: if ($public) {
3494: return 'ok';
3495: }
3496: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3497: if ($guest) {
3498: return $guest;
3499: }
3500: } else {
3501: if (@domains > 0) {
3502: foreach my $domkey (@domains) {
3503: if (ref($access_hash->{$domkey}{'dom'}) eq 'ARRAY') {
3504: if (grep(/^\Q$env{'user.domain'}\E$/,@{$access_hash->{$domkey}{'dom'}})) {
3505: return 'ok';
3506: }
3507: }
3508: }
3509: }
3510: if (@users > 0) {
3511: foreach my $userkey (@users) {
3512: if (exists($access_hash->{$userkey}{'users'}{$env{'user.name'}.':'.$env{'user.domain'}})) {
3513: return 'ok';
3514: }
3515: }
3516: }
3517: my %roleshash;
3518: my @courses_and_groups = @courses;
3519: push(@courses_and_groups,@groups);
3520: if (@courses_and_groups > 0) {
3521: my (%allgroups,%allroles);
3522: my ($start,$end,$role,$sec,$group);
3523: foreach my $envkey (%env) {
3524: if ($envkey =~ m-^user\.role\.(gr|cc|in|ta|ep|st)\./($match_domain)/($match_courseid)/?([^/]*)$-) {
3525: my $cid = $2.'_'.$3;
3526: if ($1 eq 'gr') {
3527: $group = $4;
3528: $allgroups{$cid}{$group} = $env{$envkey};
3529: } else {
3530: if ($4 eq '') {
3531: $sec = 'none';
3532: } else {
3533: $sec = $4;
3534: }
3535: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3536: }
3537: } elsif ($envkey =~ m-^user\.role\./cr/($match_domain/$match_username/\w*)./($match_domain)/($match_courseid)/?([^/]*)$-) {
3538: my $cid = $2.'_'.$3;
3539: if ($4 eq '') {
3540: $sec = 'none';
3541: } else {
3542: $sec = $4;
3543: }
3544: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3545: }
3546: }
3547: if (keys(%allroles) == 0) {
3548: return;
3549: }
3550: foreach my $key (@courses_and_groups) {
3551: my %content = %{$$access_hash{$key}};
3552: my $cnum = $content{'number'};
3553: my $cdom = $content{'domain'};
3554: my $cid = $cdom.'_'.$cnum;
3555: if (!exists($allroles{$cid})) {
3556: next;
3557: }
3558: foreach my $role_id (keys(%{$content{'roles'}})) {
3559: my @sections = @{$content{'roles'}{$role_id}{'section'}};
3560: my @groups = @{$content{'roles'}{$role_id}{'group'}};
3561: my @status = @{$content{'roles'}{$role_id}{'access'}};
3562: my @roles = @{$content{'roles'}{$role_id}{'role'}};
3563: foreach my $role (keys(%{$allroles{$cid}})) {
3564: if ((grep/^all$/,@roles) || (grep/^\Q$role\E$/,@roles)) {
3565: foreach my $sec (keys(%{$allroles{$cid}{$role}})) {
3566: if (&course_group_datechecker($allroles{$cid}{$role}{$sec},$now,\@status) eq 'ok') {
3567: if (grep/^all$/,@sections) {
3568: return 'ok';
3569: } else {
3570: if (grep/^$sec$/,@sections) {
3571: return 'ok';
3572: }
3573: }
3574: }
3575: }
3576: if (keys(%{$allgroups{$cid}}) == 0) {
3577: if (grep/^none$/,@groups) {
3578: return 'ok';
3579: }
3580: } else {
3581: if (grep/^all$/,@groups) {
3582: return 'ok';
3583: }
3584: foreach my $group (keys(%{$allgroups{$cid}})) {
3585: if (grep/^$group$/,@groups) {
3586: return 'ok';
3587: }
3588: }
3589: }
3590: }
3591: }
3592: }
3593: }
3594: }
3595: if ($guest) {
3596: return $guest;
3597: }
3598: }
3599: }
3600: return;
3601: }
3602:
3603: sub course_group_datechecker {
3604: my ($dates,$now,$status) = @_;
3605: my ($start,$end) = split(/\./,$dates);
3606: if (!$start && !$end) {
3607: return 'ok';
3608: }
3609: if (grep/^active$/,@{$status}) {
3610: if (((!$start) || ($start && $start <= $now)) && ((!$end) || ($end && $end >= $now))) {
3611: return 'ok';
3612: }
3613: }
3614: if (grep/^previous$/,@{$status}) {
3615: if ($end > $now ) {
3616: return 'ok';
3617: }
3618: }
3619: if (grep/^future$/,@{$status}) {
3620: if ($start > $now) {
3621: return 'ok';
3622: }
3623: }
3624: return;
3625: }
3626:
3627: sub parse_portfolio_url {
3628: my ($url) = @_;
3629:
3630: my ($type,$udom,$unum,$group,$file_name);
3631:
3632: if ($url =~ m-^/*(?:uploaded|editupload)/($match_domain)/($match_username)/portfolio(/.+)$-) {
3633: $type = 1;
3634: $udom = $1;
3635: $unum = $2;
3636: $file_name = $3;
3637: } elsif ($url =~ m-^/*(?:uploaded|editupload)/($match_domain)/($match_courseid)/groups/([^/]+)/portfolio/(.+)$-) {
3638: $type = 2;
3639: $udom = $1;
3640: $unum = $2;
3641: $group = $3;
3642: $file_name = $3.'/'.$4;
3643: }
3644: if (wantarray) {
3645: return ($type,$udom,$unum,$file_name,$group);
3646: }
3647: return $type;
3648: }
3649:
3650: sub is_portfolio_url {
3651: my ($url) = @_;
3652: return scalar(&parse_portfolio_url($url));
3653: }
3654:
3655: sub is_portfolio_file {
3656: my ($file) = @_;
3657: if (($file =~ /^portfolio/) || ($file =~ /^groups\/\w+\/portfolio/)) {
3658: return 1;
3659: }
3660: return;
3661: }
3662:
3663:
3664: # ---------------------------------------------- Custom access rule evaluation
3665:
3666: sub customaccess {
3667: my ($priv,$uri)=@_;
3668: my ($urole,$urealm)=split(/\./,$env{'request.role'},2);
3669: my (undef,$udom,$ucrs,$usec)=split(/\//,$urealm);
3670: $udom = &LONCAPA::clean_domain($udom);
3671: $ucrs = &LONCAPA::clean_username($ucrs);
3672: my $access=0;
3673: foreach my $right (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
3674: my ($effect,$realm,$role)=split(/\:/,$right);
3675: if ($role) {
3676: if ($role ne $urole) { next; }
3677: }
3678: foreach my $scope (split(/\s*\,\s*/,$realm)) {
3679: my ($tdom,$tcrs,$tsec)=split(/\_/,$scope);
3680: if ($tdom) {
3681: if ($tdom ne $udom) { next; }
3682: }
3683: if ($tcrs) {
3684: if ($tcrs ne $ucrs) { next; }
3685: }
3686: if ($tsec) {
3687: if ($tsec ne $usec) { next; }
3688: }
3689: $access=($effect eq 'allow');
3690: last;
3691: }
3692: if ($realm eq '' && $role eq '') {
3693: $access=($effect eq 'allow');
3694: }
3695: }
3696: return $access;
3697: }
3698:
3699: # ------------------------------------------------- Check for a user privilege
3700:
3701: sub allowed {
3702: my ($priv,$uri,$symb,$role)=@_;
3703: my $ver_orguri=$uri;
3704: $uri=&deversion($uri);
3705: my $orguri=$uri;
3706: $uri=&declutter($uri);
3707:
3708: if ($priv eq 'evb') {
3709: # Evade communication block restrictions for specified role in a course
3710: if ($env{'user.priv.'.$role} =~/evb\&([^\:]*)/) {
3711: return $1;
3712: } else {
3713: return;
3714: }
3715: }
3716:
3717: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3718: # Free bre access to adm and meta resources
3719: if (((($uri=~/^adm\//) && ($uri !~ m{/(?:smppg|bulletinboard)$}))
3720: || (($uri=~/\.meta$/) && ($uri!~m|^uploaded/|) ))
3721: && ($priv eq 'bre')) {
3722: return 'F';
3723: }
3724:
3725: # Free bre access to user's own portfolio contents
3726: my ($space,$domain,$name,@dir)=split('/',$uri);
3727: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3728: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
3729: my %setters;
3730: my ($startblock,$endblock) =
3731: &Apache::loncommon::blockcheck(\%setters,'port');
3732: if ($startblock && $endblock) {
3733: return 'B';
3734: } else {
3735: return 'F';
3736: }
3737: }
3738:
3739: # bre access to group portfolio for rgf priv in group, or mdg or vcg in course.
3740: if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
3741: && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
3742: if (exists($env{'request.course.id'})) {
3743: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
3744: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
3745: if (($domain eq $cdom) && ($name eq $cnum)) {
3746: my $courseprivid=$env{'request.course.id'};
3747: $courseprivid=~s/\_/\//;
3748: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
3749: .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
3750: return $1;
3751: } else {
3752: if ($env{'request.course.sec'}) {
3753: $courseprivid.='/'.$env{'request.course.sec'};
3754: }
3755: if ($env{'user.priv.'.$env{'request.role'}.'./'.
3756: $courseprivid} =~/(mdg|vcg)\&([^\:]*)/) {
3757: return $2;
3758: }
3759: }
3760: }
3761: }
3762: }
3763:
3764: # Free bre to public access
3765:
3766: if ($priv eq 'bre') {
3767: my $copyright=&metadata($uri,'copyright');
3768: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3769: return 'F';
3770: }
3771: if ($copyright eq 'priv') {
3772: $uri=~/([^\/]+)\/([^\/]+)\//;
3773: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3774: return '';
3775: }
3776: }
3777: if ($copyright eq 'domain') {
3778: $uri=~/([^\/]+)\/([^\/]+)\//;
3779: unless (($env{'user.domain'} eq $1) ||
3780: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3781: return '';
3782: }
3783: }
3784: if ($env{'request.role'}=~ /li\.\//) {
3785: # Library role, so allow browsing of resources in this domain.
3786: return 'F';
3787: }
3788: if ($copyright eq 'custom') {
3789: unless (&customaccess($priv,$uri)) { return ''; }
3790: }
3791: }
3792: # Domain coordinator is trying to create a course
3793: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3794: # uri is the requested domain in this case.
3795: # comparison to 'request.role.domain' shows if the user has selected
3796: # a role of dc for the domain in question.
3797: return 'F' if ($uri eq $env{'request.role.domain'});
3798: }
3799:
3800: my $thisallowed='';
3801: my $statecond=0;
3802: my $courseprivid='';
3803:
3804: # Course
3805:
3806: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3807: $thisallowed.=$1;
3808: }
3809:
3810: # Domain
3811:
3812: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3813: =~/\Q$priv\E\&([^\:]*)/) {
3814: $thisallowed.=$1;
3815: }
3816:
3817: # Course: uri itself is a course
3818: my $courseuri=$uri;
3819: $courseuri=~s/\_(\d)/\/$1/;
3820: $courseuri=~s/^([^\/])/\/$1/;
3821:
3822: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3823: =~/\Q$priv\E\&([^\:]*)/) {
3824: $thisallowed.=$1;
3825: }
3826:
3827: # URI is an uploaded document for this course, default permissions don't matter
3828: # not allowing 'edit' access (editupload) to uploaded course docs
3829: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3830: $thisallowed='';
3831: my ($match)=&is_on_map($uri);
3832: if ($match) {
3833: if ($env{'user.priv.'.$env{'request.role'}.'./'}
3834: =~/\Q$priv\E\&([^\:]*)/) {
3835: $thisallowed.=$1;
3836: }
3837: } else {
3838: my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
3839: if ($refuri) {
3840: if ($refuri =~ m|^/adm/|) {
3841: $thisallowed='F';
3842: } else {
3843: $refuri=&declutter($refuri);
3844: my ($match) = &is_on_map($refuri);
3845: if ($match) {
3846: $thisallowed='F';
3847: }
3848: }
3849: }
3850: }
3851: }
3852:
3853: if ($priv eq 'bre'
3854: && $thisallowed ne 'F'
3855: && $thisallowed ne '2'
3856: && &is_portfolio_url($uri)) {
3857: $thisallowed = &portfolio_access($uri);
3858: }
3859:
3860: # Full access at system, domain or course-wide level? Exit.
3861:
3862: if ($thisallowed=~/F/) {
3863: return 'F';
3864: }
3865:
3866: # If this is generating or modifying users, exit with special codes
3867:
3868: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3869: if (($priv eq 'cca') || ($priv eq 'caa')) {
3870: my ($audom,$auname)=split('/',$uri);
3871: # no author name given, so this just checks on the general right to make a co-author in this domain
3872: unless ($auname) { return $thisallowed; }
3873: # an author name is given, so we are about to actually make a co-author for a certain account
3874: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3875: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3876: ($audom ne $env{'request.role.domain'}))) { return ''; }
3877: }
3878: return $thisallowed;
3879: }
3880: #
3881: # Gathered so far: system, domain and course wide privileges
3882: #
3883: # Course: See if uri or referer is an individual resource that is part of
3884: # the course
3885:
3886: if ($env{'request.course.id'}) {
3887:
3888: $courseprivid=$env{'request.course.id'};
3889: if ($env{'request.course.sec'}) {
3890: $courseprivid.='/'.$env{'request.course.sec'};
3891: }
3892: $courseprivid=~s/\_/\//;
3893: my $checkreferer=1;
3894: my ($match,$cond)=&is_on_map($uri);
3895: if ($match) {
3896: $statecond=$cond;
3897: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3898: =~/\Q$priv\E\&([^\:]*)/) {
3899: $thisallowed.=$1;
3900: $checkreferer=0;
3901: }
3902: }
3903:
3904: if ($checkreferer) {
3905: my $refuri=$env{'httpref.'.$orguri};
3906: unless ($refuri) {
3907: foreach my $key (keys(%env)) {
3908: if ($key=~/^httpref\..*\*/) {
3909: my $pattern=$key;
3910: $pattern=~s/^httpref\.\/res\///;
3911: $pattern=~s/\*/\[\^\/\]\+/g;
3912: $pattern=~s/\//\\\//g;
3913: if ($orguri=~/$pattern/) {
3914: $refuri=$env{$key};
3915: }
3916: }
3917: }
3918: }
3919:
3920: if ($refuri) {
3921: $refuri=&declutter($refuri);
3922: my ($match,$cond)=&is_on_map($refuri);
3923: if ($match) {
3924: my $refstatecond=$cond;
3925: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3926: =~/\Q$priv\E\&([^\:]*)/) {
3927: $thisallowed.=$1;
3928: $uri=$refuri;
3929: $statecond=$refstatecond;
3930: }
3931: }
3932: }
3933: }
3934: }
3935:
3936: #
3937: # Gathered now: all privileges that could apply, and condition number
3938: #
3939: #
3940: # Full or no access?
3941: #
3942:
3943: if ($thisallowed=~/F/) {
3944: return 'F';
3945: }
3946:
3947: unless ($thisallowed) {
3948: return '';
3949: }
3950:
3951: # Restrictions exist, deal with them
3952: #
3953: # C:according to course preferences
3954: # R:according to resource settings
3955: # L:unless locked
3956: # X:according to user session state
3957: #
3958:
3959: # Possibly locked functionality, check all courses
3960: # Locks might take effect only after 10 minutes cache expiration for other
3961: # courses, and 2 minutes for current course
3962:
3963: my $envkey;
3964: if ($thisallowed=~/L/) {
3965: foreach $envkey (keys %env) {
3966: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3967: my $courseid=$2;
3968: my $roleid=$1.'.'.$2;
3969: $courseid=~s/^\///;
3970: my $expiretime=600;
3971: if ($env{'request.role'} eq $roleid) {
3972: $expiretime=120;
3973: }
3974: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3975: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3976: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3977: &coursedescription($courseid,{'freshen_cache' => 1});
3978: }
3979: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3980: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3981: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3982: &log($env{'user.domain'},$env{'user.name'},
3983: $env{'user.home'},
3984: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3985: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3986: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3987: return '';
3988: }
3989: }
3990: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3991: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3992: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3993: &log($env{'user.domain'},$env{'user.name'},
3994: $env{'user.home'},
3995: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3996: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3997: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3998: return '';
3999: }
4000: }
4001: }
4002: }
4003: }
4004:
4005: #
4006: # Rest of the restrictions depend on selected course
4007: #
4008:
4009: unless ($env{'request.course.id'}) {
4010: if ($thisallowed eq 'A') {
4011: return 'A';
4012: } elsif ($thisallowed eq 'B') {
4013: return 'B';
4014: } else {
4015: return '1';
4016: }
4017: }
4018:
4019: #
4020: # Now user is definitely in a course
4021: #
4022:
4023:
4024: # Course preferences
4025:
4026: if ($thisallowed=~/C/) {
4027: my $rolecode=(split(/\./,$env{'request.role'}))[0];
4028: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
4029: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
4030: =~/\Q$rolecode\E/) {
4031: if ($priv ne 'pch') {
4032: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
4033: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
4034: $env{'request.course.id'});
4035: }
4036: return '';
4037: }
4038:
4039: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
4040: =~/\Q$unamedom\E/) {
4041: if ($priv ne 'pch') {
4042: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
4043: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
4044: $env{'request.course.id'});
4045: }
4046: return '';
4047: }
4048: }
4049:
4050: # Resource preferences
4051:
4052: if ($thisallowed=~/R/) {
4053: my $rolecode=(split(/\./,$env{'request.role'}))[0];
4054: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
4055: if ($priv ne 'pch') {
4056: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
4057: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
4058: }
4059: return '';
4060: }
4061: }
4062:
4063: # Restricted by state or randomout?
4064:
4065: if ($thisallowed=~/X/) {
4066: if ($env{'acc.randomout'}) {
4067: if (!$symb) { $symb=&symbread($uri,1); }
4068: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
4069: return '';
4070: }
4071: }
4072: if (&condval($statecond)) {
4073: return '2';
4074: } else {
4075: return '';
4076: }
4077: }
4078:
4079: if ($thisallowed eq 'A') {
4080: return 'A';
4081: } elsif ($thisallowed eq 'B') {
4082: return 'B';
4083: }
4084: return 'F';
4085: }
4086:
4087: sub split_uri_for_cond {
4088: my $uri=&deversion(&declutter(shift));
4089: my @uriparts=split(/\//,$uri);
4090: my $filename=pop(@uriparts);
4091: my $pathname=join('/',@uriparts);
4092: return ($pathname,$filename);
4093: }
4094: # --------------------------------------------------- Is a resource on the map?
4095:
4096: sub is_on_map {
4097: my ($pathname,$filename) = &split_uri_for_cond(shift);
4098: #Trying to find the conditional for the file
4099: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
4100: /\&\Q$filename\E\:([\d\|]+)\&/);
4101: if ($match) {
4102: return (1,$1);
4103: } else {
4104: return (0,0);
4105: }
4106: }
4107:
4108: # --------------------------------------------------------- Get symb from alias
4109:
4110: sub get_symb_from_alias {
4111: my $symb=shift;
4112: my ($map,$resid,$url)=&decode_symb($symb);
4113: # Already is a symb
4114: if ($url) { return $symb; }
4115: # Must be an alias
4116: my $aliassymb='';
4117: my %bighash;
4118: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4119: &GDBM_READER(),0640)) {
4120: my $rid=$bighash{'mapalias_'.$symb};
4121: if ($rid) {
4122: my ($mapid,$resid)=split(/\./,$rid);
4123: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
4124: $resid,$bighash{'src_'.$rid});
4125: }
4126: untie %bighash;
4127: }
4128: return $aliassymb;
4129: }
4130:
4131: # ----------------------------------------------------------------- Define Role
4132:
4133: sub definerole {
4134: if (allowed('mcr','/')) {
4135: my ($rolename,$sysrole,$domrole,$courole)=@_;
4136: foreach my $role (split(':',$sysrole)) {
4137: my ($crole,$cqual)=split(/\&/,$role);
4138: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
4139: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
4140: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
4141: return "refused:s:$crole&$cqual";
4142: }
4143: }
4144: }
4145: foreach my $role (split(':',$domrole)) {
4146: my ($crole,$cqual)=split(/\&/,$role);
4147: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
4148: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
4149: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
4150: return "refused:d:$crole&$cqual";
4151: }
4152: }
4153: }
4154: foreach my $role (split(':',$courole)) {
4155: my ($crole,$cqual)=split(/\&/,$role);
4156: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
4157: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
4158: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
4159: return "refused:c:$crole&$cqual";
4160: }
4161: }
4162: }
4163: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4164: "$env{'user.domain'}:$env{'user.name'}:".
4165: "rolesdef_$rolename=".
4166: escape($sysrole.'_'.$domrole.'_'.$courole);
4167: return reply($command,$env{'user.home'});
4168: } else {
4169: return 'refused';
4170: }
4171: }
4172:
4173: # ---------------- Make a metadata query against the network of library servers
4174:
4175: sub metadata_query {
4176: my ($query,$custom,$customshow,$server_array)=@_;
4177: my %rhash;
4178: my %libserv = &all_library();
4179: my @server_list = (defined($server_array) ? @$server_array
4180: : keys(%libserv) );
4181: for my $server (@server_list) {
4182: unless ($custom or $customshow) {
4183: my $reply=&reply("querysend:".&escape($query),$server);
4184: $rhash{$server}=$reply;
4185: }
4186: else {
4187: my $reply=&reply("querysend:".&escape($query).':'.
4188: &escape($custom).':'.&escape($customshow),
4189: $server);
4190: $rhash{$server}=$reply;
4191: }
4192: }
4193: return \%rhash;
4194: }
4195:
4196: # ----------------------------------------- Send log queries and wait for reply
4197:
4198: sub log_query {
4199: my ($uname,$udom,$query,%filters)=@_;
4200: my $uhome=&homeserver($uname,$udom);
4201: if ($uhome eq 'no_host') { return 'error: no_host'; }
4202: my $uhost=&hostname($uhome);
4203: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys(%filters)));
4204: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
4205: $uhome);
4206: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
4207: return get_query_reply($queryid);
4208: }
4209:
4210: # -------------------------- Update MySQL table for portfolio file
4211:
4212: sub update_portfolio_table {
4213: my ($uname,$udom,$file_name,$query,$group,$action) = @_;
4214: my $homeserver = &homeserver($uname,$udom);
4215: my $queryid=
4216: &reply("querysend:".$query.':'.&escape($uname.':'.$udom.':'.$group).
4217: ':'.&escape($file_name).':'.$action,$homeserver);
4218: my $reply = &get_query_reply($queryid);
4219: return $reply;
4220: }
4221:
4222: # ------- Request retrieval of institutional classlists for course(s)
4223:
4224: sub fetch_enrollment_query {
4225: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
4226: my $homeserver;
4227: my $maxtries = 1;
4228: if ($context eq 'automated') {
4229: $homeserver = $perlvar{'lonHostID'};
4230: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
4231: } else {
4232: $homeserver = &homeserver($cnum,$dom);
4233: }
4234: my $host=&hostname($homeserver);
4235: my $cmd = '';
4236: foreach my $affiliate (keys %{$affiliatesref}) {
4237: $cmd .= $affiliate.'='.join(",",@{$$affiliatesref{$affiliate}}).'%%';
4238: }
4239: $cmd =~ s/%%$//;
4240: $cmd = &escape($cmd);
4241: my $query = 'fetchenrollment';
4242: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
4243: unless ($queryid=~/^\Q$host\E\_/) {
4244: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
4245: return 'error: '.$queryid;
4246: }
4247: my $reply = &get_query_reply($queryid);
4248: my $tries = 1;
4249: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4250: $reply = &get_query_reply($queryid);
4251: $tries ++;
4252: }
4253: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4254: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4255: } else {
4256: my @responses = split/:/,$reply;
4257: if ($homeserver eq $perlvar{'lonHostID'}) {
4258: foreach my $line (@responses) {
4259: my ($key,$value) = split(/=/,$line,2);
4260: $$replyref{$key} = $value;
4261: }
4262: } else {
4263: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
4264: foreach my $line (@responses) {
4265: my ($key,$value) = split(/=/,$line);
4266: $$replyref{$key} = $value;
4267: if ($value > 0) {
4268: foreach my $item (@{$$affiliatesref{$key}}) {
4269: my $filename = $dom.'_'.$key.'_'.$item.'_classlist.xml';
4270: my $destname = $pathname.'/'.$filename;
4271: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
4272: if ($xml_classlist =~ /^error/) {
4273: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
4274: } else {
4275: if ( open(FILE,">$destname") ) {
4276: print FILE &unescape($xml_classlist);
4277: close(FILE);
4278: } else {
4279: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
4280: }
4281: }
4282: }
4283: }
4284: }
4285: }
4286: return 'ok';
4287: }
4288: return 'error';
4289: }
4290:
4291: sub get_query_reply {
4292: my $queryid=shift;
4293: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
4294: my $reply='';
4295: for (1..100) {
4296: sleep 2;
4297: if (-e $replyfile.'.end') {
4298: if (open(my $fh,$replyfile)) {
4299: $reply.=<$fh>;
4300: close($fh);
4301: } else { return 'error: reply_file_error'; }
4302: return &unescape($reply);
4303: }
4304: }
4305: return 'timeout:'.$queryid;
4306: }
4307:
4308: sub courselog_query {
4309: #
4310: # possible filters:
4311: # url: url or symb
4312: # username
4313: # domain
4314: # action: view, submit, grade
4315: # start: timestamp
4316: # end: timestamp
4317: #
4318: my (%filters)=@_;
4319: unless ($env{'request.course.id'}) { return 'no_course'; }
4320: if ($filters{'url'}) {
4321: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
4322: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
4323: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
4324: }
4325: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
4326: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
4327: return &log_query($cname,$cdom,'courselog',%filters);
4328: }
4329:
4330: sub userlog_query {
4331: my ($uname,$udom,%filters)=@_;
4332: return &log_query($uname,$udom,'userlog',%filters);
4333: }
4334:
4335: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
4336:
4337: sub auto_run {
4338: my ($cnum,$cdom) = @_;
4339: my $homeserver = &homeserver($cnum,$cdom);
4340: my $response = &reply('autorun:'.$cdom,$homeserver);
4341: return $response;
4342: }
4343:
4344: sub auto_get_sections {
4345: my ($cnum,$cdom,$inst_coursecode) = @_;
4346: my $homeserver = &homeserver($cnum,$cdom);
4347: my @secs = ();
4348: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
4349: unless ($response eq 'refused') {
4350: @secs = split/:/,$response;
4351: }
4352: return @secs;
4353: }
4354:
4355: sub auto_new_course {
4356: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
4357: my $homeserver = &homeserver($cnum,$cdom);
4358: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
4359: return $response;
4360: }
4361:
4362: sub auto_validate_courseID {
4363: my ($cnum,$cdom,$inst_course_id) = @_;
4364: my $homeserver = &homeserver($cnum,$cdom);
4365: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
4366: return $response;
4367: }
4368:
4369: sub auto_create_password {
4370: my ($cnum,$cdom,$authparam) = @_;
4371: my $homeserver = &homeserver($cnum,$cdom);
4372: my $create_passwd = 0;
4373: my $authchk = '';
4374: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
4375: if ($response eq 'refused') {
4376: $authchk = 'refused';
4377: } else {
4378: ($authparam,$create_passwd,$authchk) = split/:/,$response;
4379: }
4380: return ($authparam,$create_passwd,$authchk);
4381: }
4382:
4383: sub auto_photo_permission {
4384: my ($cnum,$cdom,$students) = @_;
4385: my $homeserver = &homeserver($cnum,$cdom);
4386: my ($outcome,$perm_reqd,$conditions) =
4387: split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
4388: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4389: return (undef,undef);
4390: }
4391: return ($outcome,$perm_reqd,$conditions);
4392: }
4393:
4394: sub auto_checkphotos {
4395: my ($uname,$udom,$pid) = @_;
4396: my $homeserver = &homeserver($uname,$udom);
4397: my ($result,$resulttype);
4398: my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
4399: &escape($uname).':'.&escape($pid),
4400: $homeserver));
4401: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4402: return (undef,undef);
4403: }
4404: if ($outcome) {
4405: ($result,$resulttype) = split(/:/,$outcome);
4406: }
4407: return ($result,$resulttype);
4408: }
4409:
4410: sub auto_photochoice {
4411: my ($cnum,$cdom) = @_;
4412: my $homeserver = &homeserver($cnum,$cdom);
4413: my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
4414: &escape($cdom),
4415: $homeserver)));
4416: if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4417: return (undef,undef);
4418: }
4419: return ($update,$comment);
4420: }
4421:
4422: sub auto_photoupdate {
4423: my ($affiliatesref,$dom,$cnum,$photo) = @_;
4424: my $homeserver = &homeserver($cnum,$dom);
4425: my $host=&hostname($homeserver);
4426: my $cmd = '';
4427: my $maxtries = 1;
4428: foreach my $affiliate (keys(%{$affiliatesref})) {
4429: $cmd .= $affiliate.'='.join(",",@{$$affiliatesref{$affiliate}}).'%%';
4430: }
4431: $cmd =~ s/%%$//;
4432: $cmd = &escape($cmd);
4433: my $query = 'institutionalphotos';
4434: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
4435: unless ($queryid=~/^\Q$host\E\_/) {
4436: &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
4437: return 'error: '.$queryid;
4438: }
4439: my $reply = &get_query_reply($queryid);
4440: my $tries = 1;
4441: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4442: $reply = &get_query_reply($queryid);
4443: $tries ++;
4444: }
4445: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4446: &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4447: } else {
4448: my @responses = split(/:/,$reply);
4449: my $outcome = shift(@responses);
4450: foreach my $item (@responses) {
4451: my ($key,$value) = split(/=/,$item);
4452: $$photo{$key} = $value;
4453: }
4454: return $outcome;
4455: }
4456: return 'error';
4457: }
4458:
4459: sub auto_instcode_format {
4460: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,
4461: $cat_order) = @_;
4462: my $courses = '';
4463: my @homeservers;
4464: if ($caller eq 'global') {
4465: my %servers = &get_servers($codedom,'library');
4466: foreach my $tryserver (keys(%servers)) {
4467: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4468: push(@homeservers,$tryserver);
4469: }
4470: }
4471: } else {
4472: push(@homeservers,&homeserver($caller,$codedom));
4473: }
4474: foreach my $code (keys(%{$instcodes})) {
4475: $courses .= &escape($code).'='.&escape($$instcodes{$code}).'&';
4476: }
4477: chop($courses);
4478: my $ok_response = 0;
4479: my $response;
4480: while (@homeservers > 0 && $ok_response == 0) {
4481: my $server = shift(@homeservers);
4482: $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$server);
4483: if ($response !~ /(con_lost|error|no_such_host|refused)/) {
4484: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) =
4485: split/:/,$response;
4486: %{$codes} = (%{$codes},&str2hash($codes_str));
4487: push(@{$codetitles},&str2array($codetitles_str));
4488: %{$cat_titles} = (%{$cat_titles},&str2hash($cat_titles_str));
4489: %{$cat_order} = (%{$cat_order},&str2hash($cat_order_str));
4490: $ok_response = 1;
4491: }
4492: }
4493: if ($ok_response) {
4494: return 'ok';
4495: } else {
4496: return $response;
4497: }
4498: }
4499:
4500: sub auto_instcode_defaults {
4501: my ($domain,$returnhash,$code_order) = @_;
4502: my @homeservers;
4503:
4504: my %servers = &get_servers($domain,'library');
4505: foreach my $tryserver (keys(%servers)) {
4506: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4507: push(@homeservers,$tryserver);
4508: }
4509: }
4510:
4511: my $response;
4512: foreach my $server (@homeservers) {
4513: $response=&reply('autoinstcodedefaults:'.$domain,$server);
4514: next if ($response =~ /(con_lost|error|no_such_host|refused)/);
4515:
4516: foreach my $pair (split(/\&/,$response)) {
4517: my ($name,$value)=split(/\=/,$pair);
4518: if ($name eq 'code_order') {
4519: @{$code_order} = split(/\&/,&unescape($value));
4520: } else {
4521: $returnhash->{&unescape($name)}=&unescape($value);
4522: }
4523: }
4524: return 'ok';
4525: }
4526:
4527: return $response;
4528: }
4529:
4530: sub auto_validate_class_sec {
4531: my ($cdom,$cnum,$owner,$inst_class) = @_;
4532: my $homeserver = &homeserver($cnum,$cdom);
4533: my $response=&reply('autovalidateclass_sec:'.$inst_class.':'.
4534: &escape($owner).':'.$cdom,$homeserver);
4535: return $response;
4536: }
4537:
4538: # ------------------------------------------------------- Course Group routines
4539:
4540: sub get_coursegroups {
4541: my ($cdom,$cnum,$group,$namespace) = @_;
4542: return(&dump($namespace,$cdom,$cnum,$group));
4543: }
4544:
4545: sub modify_coursegroup {
4546: my ($cdom,$cnum,$groupsettings) = @_;
4547: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
4548: }
4549:
4550: sub toggle_coursegroup_status {
4551: my ($cdom,$cnum,$group,$action) = @_;
4552: my ($from_namespace,$to_namespace);
4553: if ($action eq 'delete') {
4554: $from_namespace = 'coursegroups';
4555: $to_namespace = 'deleted_groups';
4556: } else {
4557: $from_namespace = 'deleted_groups';
4558: $to_namespace = 'coursegroups';
4559: }
4560: my %curr_group = &get_coursegroups($cdom,$cnum,$group,$from_namespace);
4561: if (my $tmp = &error(%curr_group)) {
4562: &Apache::lonnet::logthis('Error retrieving group: '.$tmp.' in '.$cnum.':'.$cdom);
4563: return ('read error',$tmp);
4564: } else {
4565: my %savedsettings = %curr_group;
4566: my $result = &put($to_namespace,\%savedsettings,$cdom,$cnum);
4567: my $deloutcome;
4568: if ($result eq 'ok') {
4569: $deloutcome = &del($from_namespace,[$group],$cdom,$cnum);
4570: } else {
4571: return ('write error',$result);
4572: }
4573: if ($deloutcome eq 'ok') {
4574: return 'ok';
4575: } else {
4576: return ('delete error',$deloutcome);
4577: }
4578: }
4579: }
4580:
4581: sub modify_group_roles {
4582: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
4583: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
4584: my $role = 'gr/'.&escape($userprivs);
4585: my ($uname,$udom) = split(/:/,$user);
4586: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
4587: if ($result eq 'ok') {
4588: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
4589: }
4590: return $result;
4591: }
4592:
4593: sub modify_coursegroup_membership {
4594: my ($cdom,$cnum,$membership) = @_;
4595: my $result = &put('groupmembership',$membership,$cdom,$cnum);
4596: return $result;
4597: }
4598:
4599: sub get_active_groups {
4600: my ($udom,$uname,$cdom,$cnum) = @_;
4601: my $now = time;
4602: my %groups = ();
4603: foreach my $key (keys(%env)) {
4604: if ($key =~ m-user\.role\.gr\./($match_domain)/($match_courseid)/(\w+)$-) {
4605: my ($start,$end) = split(/\./,$env{$key});
4606: if (($end!=0) && ($end<$now)) { next; }
4607: if (($start!=0) && ($start>$now)) { next; }
4608: if ($1 eq $cdom && $2 eq $cnum) {
4609: $groups{$3} = $env{$key} ;
4610: }
4611: }
4612: }
4613: return %groups;
4614: }
4615:
4616: sub get_group_membership {
4617: my ($cdom,$cnum,$group) = @_;
4618: return(&dump('groupmembership',$cdom,$cnum,$group));
4619: }
4620:
4621: sub get_users_groups {
4622: my ($udom,$uname,$courseid) = @_;
4623: my @usersgroups;
4624: my $cachetime=1800;
4625:
4626: my $hashid="$udom:$uname:$courseid";
4627: my ($grouplist,$cached)=&is_cached_new('getgroups',$hashid);
4628: if (defined($cached)) {
4629: @usersgroups = split(/:/,$grouplist);
4630: } else {
4631: $grouplist = '';
4632: my $courseurl = &courseid_to_courseurl($courseid);
4633: my %roleshash = &dump('roles',$udom,$uname,$courseurl);
4634: my $access_end = $env{'course.'.$courseid.
4635: '.default_enrollment_end_date'};
4636: my $now = time;
4637: foreach my $key (keys(%roleshash)) {
4638: if ($key =~ /^\Q$courseurl\E\/(\w+)\_gr$/) {
4639: my $group = $1;
4640: if ($roleshash{$key} =~ /_(\d+)_(\d+)$/) {
4641: my $start = $2;
4642: my $end = $1;
4643: if ($start == -1) { next; } # deleted from group
4644: if (($start!=0) && ($start>$now)) { next; }
4645: if (($end!=0) && ($end<$now)) {
4646: if ($access_end && $access_end < $now) {
4647: if ($access_end - $end < 86400) {
4648: push(@usersgroups,$group);
4649: }
4650: }
4651: next;
4652: }
4653: push(@usersgroups,$group);
4654: }
4655: }
4656: }
4657: @usersgroups = &sort_course_groups($courseid,@usersgroups);
4658: $grouplist = join(':',@usersgroups);
4659: &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
4660: }
4661: return @usersgroups;
4662: }
4663:
4664: sub devalidate_getgroups_cache {
4665: my ($udom,$uname,$cdom,$cnum)=@_;
4666: my $courseid = $cdom.'_'.$cnum;
4667:
4668: my $hashid="$udom:$uname:$courseid";
4669: &devalidate_cache_new('getgroups',$hashid);
4670: }
4671:
4672: # ------------------------------------------------------------------ Plain Text
4673:
4674: sub plaintext {
4675: my ($short,$type,$cid) = @_;
4676: if ($short =~ /^cr/) {
4677: return (split('/',$short))[-1];
4678: }
4679: if (!defined($cid)) {
4680: $cid = $env{'request.course.id'};
4681: }
4682: if (defined($cid) && defined($env{'course.'.$cid.'.'.$short.'.plaintext'})) {
4683: return &Apache::lonlocal::mt($env{'course.'.$cid.'.'.$short.
4684: '.plaintext'});
4685: }
4686: my %rolenames = (
4687: Course => 'std',
4688: Group => 'alt1',
4689: );
4690: if (defined($type) &&
4691: defined($rolenames{$type}) &&
4692: defined($prp{$short}{$rolenames{$type}})) {
4693: return &Apache::lonlocal::mt($prp{$short}{$rolenames{$type}});
4694: } else {
4695: return &Apache::lonlocal::mt($prp{$short}{'std'});
4696: }
4697: }
4698:
4699: # ----------------------------------------------------------------- Assign Role
4700:
4701: sub assignrole {
4702: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
4703: my $mrole;
4704: if ($role =~ /^cr\//) {
4705: my $cwosec=$url;
4706: $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
4707: unless (&allowed('ccr',$cwosec)) {
4708: &logthis('Refused custom assignrole: '.
4709: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4710: $env{'user.name'}.' at '.$env{'user.domain'});
4711: return 'refused';
4712: }
4713: $mrole='cr';
4714: } elsif ($role =~ /^gr\//) {
4715: my $cwogrp=$url;
4716: $cwogrp=~s{^/($match_domain)/($match_courseid)/.*}{$1/$2};
4717: unless (&allowed('mdg',$cwogrp)) {
4718: &logthis('Refused group assignrole: '.
4719: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4720: $env{'user.name'}.' at '.$env{'user.domain'});
4721: return 'refused';
4722: }
4723: $mrole='gr';
4724: } else {
4725: my $cwosec=$url;
4726: $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
4727: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
4728: &logthis('Refused assignrole: '.
4729: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4730: $env{'user.name'}.' at '.$env{'user.domain'});
4731: return 'refused';
4732: }
4733: $mrole=$role;
4734: }
4735: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4736: "$udom:$uname:$url".'_'."$mrole=$role";
4737: if ($end) { $command.='_'.$end; }
4738: if ($start) {
4739: if ($end) {
4740: $command.='_'.$start;
4741: } else {
4742: $command.='_0_'.$start;
4743: }
4744: }
4745: my $origstart = $start;
4746: my $origend = $end;
4747: # actually delete
4748: if ($deleteflag) {
4749: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
4750: # modify command to delete the role
4751: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
4752: "$udom:$uname:$url".'_'."$mrole";
4753: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
4754: # set start and finish to negative values for userrolelog
4755: $start=-1;
4756: $end=-1;
4757: }
4758: }
4759: # send command
4760: my $answer=&reply($command,&homeserver($uname,$udom));
4761: # log new user role if status is ok
4762: if ($answer eq 'ok') {
4763: &userrolelog($role,$uname,$udom,$url,$start,$end);
4764: # for course roles, perform group memberships changes triggered by role change.
4765: unless ($role =~ /^gr/) {
4766: &Apache::longroup::group_changes($udom,$uname,$url,$role,$origend,
4767: $origstart);
4768: }
4769: }
4770: return $answer;
4771: }
4772:
4773: # -------------------------------------------------- Modify user authentication
4774: # Overrides without validation
4775:
4776: sub modifyuserauth {
4777: my ($udom,$uname,$umode,$upass)=@_;
4778: my $uhome=&homeserver($uname,$udom);
4779: unless (&allowed('mau',$udom)) { return 'refused'; }
4780: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
4781: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4782: ' in domain '.$env{'request.role.domain'});
4783: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
4784: &escape($upass),$uhome);
4785: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
4786: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
4787: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4788: &log($udom,,$uname,$uhome,
4789: 'Authentication changed by '.$env{'user.domain'}.', '.
4790: $env{'user.name'}.', '.$umode.
4791: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4792: unless ($reply eq 'ok') {
4793: &logthis('Authentication mode error: '.$reply);
4794: return 'error: '.$reply;
4795: }
4796: return 'ok';
4797: }
4798:
4799: # --------------------------------------------------------------- Modify a user
4800:
4801: sub modifyuser {
4802: my ($udom, $uname, $uid,
4803: $umode, $upass, $first,
4804: $middle, $last, $gene,
4805: $forceid, $desiredhome, $email)=@_;
4806: $udom= &LONCAPA::clean_domain($udom);
4807: $uname=&LONCAPA::clean_username($uname);
4808: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
4809: $umode.', '.$first.', '.$middle.', '.
4810: $last.', '.$gene.'(forceid: '.$forceid.')'.
4811: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
4812: ' desiredhome not specified').
4813: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4814: ' in domain '.$env{'request.role.domain'});
4815: my $uhome=&homeserver($uname,$udom,'true');
4816: # ----------------------------------------------------------------- Create User
4817: if (($uhome eq 'no_host') &&
4818: (($umode && $upass) || ($umode eq 'localauth'))) {
4819: my $unhome='';
4820: if (defined($desiredhome) && &host_domain($desiredhome) eq $udom) {
4821: $unhome = $desiredhome;
4822: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
4823: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
4824: } else { # load balancing routine for determining $unhome
4825: my $loadm=10000000;
4826: my %servers = &get_servers($udom,'library');
4827: foreach my $tryserver (keys(%servers)) {
4828: my $answer=reply('load',$tryserver);
4829: if (($answer=~/\d+/) && ($answer<$loadm)) {
4830: $loadm=$answer;
4831: $unhome=$tryserver;
4832: }
4833: }
4834: }
4835: if (($unhome eq '') || ($unhome eq 'no_host')) {
4836: return 'error: unable to find a home server for '.$uname.
4837: ' in domain '.$udom;
4838: }
4839: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
4840: &escape($upass),$unhome);
4841: unless ($reply eq 'ok') {
4842: return 'error: '.$reply;
4843: }
4844: $uhome=&homeserver($uname,$udom,'true');
4845: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
4846: return 'error: unable verify users home machine.';
4847: }
4848: } # End of creation of new user
4849: # ---------------------------------------------------------------------- Add ID
4850: if ($uid) {
4851: $uid=~tr/A-Z/a-z/;
4852: my %uidhash=&idrget($udom,$uname);
4853: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
4854: && (!$forceid)) {
4855: unless ($uid eq $uidhash{$uname}) {
4856: return 'error: user id "'.$uid.'" does not match '.
4857: 'current user id "'.$uidhash{$uname}.'".';
4858: }
4859: } else {
4860: &idput($udom,($uname => $uid));
4861: }
4862: }
4863: # -------------------------------------------------------------- Add names, etc
4864: my @tmp=&get('environment',
4865: ['firstname','middlename','lastname','generation'],
4866: $udom,$uname);
4867: my %names;
4868: if ($tmp[0] =~ m/^error:.*/) {
4869: %names=();
4870: } else {
4871: %names = @tmp;
4872: }
4873: #
4874: # Make sure to not trash student environment if instructor does not bother
4875: # to supply name and email information
4876: #
4877: if ($first) { $names{'firstname'} = $first; }
4878: if (defined($middle)) { $names{'middlename'} = $middle; }
4879: if ($last) { $names{'lastname'} = $last; }
4880: if (defined($gene)) { $names{'generation'} = $gene; }
4881: if ($email) {
4882: $email=~s/[^\w\@\.\-\,]//gs;
4883: if ($email=~/\@/) { $names{'notification'} = $email;
4884: $names{'critnotification'} = $email;
4885: $names{'permanentemail'} = $email; }
4886: }
4887: my $reply = &put('environment', \%names, $udom,$uname);
4888: if ($reply ne 'ok') { return 'error: '.$reply; }
4889: &devalidate_cache_new('namescache',$uname.':'.$udom);
4890: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
4891: $umode.', '.$first.', '.$middle.', '.
4892: $last.', '.$gene.' by '.
4893: $env{'user.name'}.' at '.$env{'user.domain'});
4894: return 'ok';
4895: }
4896:
4897: # -------------------------------------------------------------- Modify student
4898:
4899: sub modifystudent {
4900: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
4901: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
4902: if (!$cid) {
4903: unless ($cid=$env{'request.course.id'}) {
4904: return 'not_in_class';
4905: }
4906: }
4907: # --------------------------------------------------------------- Make the user
4908: my $reply=&modifyuser
4909: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
4910: $desiredhome,$email);
4911: unless ($reply eq 'ok') { return $reply; }
4912: # This will cause &modify_student_enrollment to get the uid from the
4913: # students environment
4914: $uid = undef if (!$forceid);
4915: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
4916: $gene,$usec,$end,$start,$type,$locktype,$cid);
4917: return $reply;
4918: }
4919:
4920: sub modify_student_enrollment {
4921: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
4922: my ($cdom,$cnum,$chome);
4923: if (!$cid) {
4924: unless ($cid=$env{'request.course.id'}) {
4925: return 'not_in_class';
4926: }
4927: $cdom=$env{'course.'.$cid.'.domain'};
4928: $cnum=$env{'course.'.$cid.'.num'};
4929: } else {
4930: ($cdom,$cnum)=split(/_/,$cid);
4931: }
4932: $chome=$env{'course.'.$cid.'.home'};
4933: if (!$chome) {
4934: $chome=&homeserver($cnum,$cdom);
4935: }
4936: if (!$chome) { return 'unknown_course'; }
4937: # Make sure the user exists
4938: my $uhome=&homeserver($uname,$udom);
4939: if (($uhome eq '') || ($uhome eq 'no_host')) {
4940: return 'error: no such user';
4941: }
4942: # Get student data if we were not given enough information
4943: if (!defined($first) || $first eq '' ||
4944: !defined($last) || $last eq '' ||
4945: !defined($uid) || $uid eq '' ||
4946: !defined($middle) || $middle eq '' ||
4947: !defined($gene) || $gene eq '') {
4948: # They did not supply us with enough data to enroll the student, so
4949: # we need to pick up more information.
4950: my %tmp = &get('environment',
4951: ['firstname','middlename','lastname', 'generation','id']
4952: ,$udom,$uname);
4953:
4954: #foreach my $key (keys(%tmp)) {
4955: # &logthis("key $key = ".$tmp{$key});
4956: #}
4957: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
4958: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
4959: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
4960: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
4961: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
4962: }
4963: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
4964: my $reply=cput('classlist',
4965: {"$uname:$udom" =>
4966: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
4967: $cdom,$cnum);
4968: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
4969: return 'error: '.$reply;
4970: } else {
4971: &devalidate_getsection_cache($udom,$uname,$cid);
4972: }
4973: # Add student role to user
4974: my $uurl='/'.$cid;
4975: $uurl=~s/\_/\//g;
4976: if ($usec) {
4977: $uurl.='/'.$usec;
4978: }
4979: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
4980: }
4981:
4982: sub format_name {
4983: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
4984: my $name;
4985: if ($first ne 'lastname') {
4986: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
4987: } else {
4988: if ($lastname=~/\S/) {
4989: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
4990: $name=~s/\s+,/,/;
4991: } else {
4992: $name.= $firstname.' '.$middlename.' '.$generation;
4993: }
4994: }
4995: $name=~s/^\s+//;
4996: $name=~s/\s+$//;
4997: $name=~s/\s+/ /g;
4998: return $name;
4999: }
5000:
5001: # ------------------------------------------------- Write to course preferences
5002:
5003: sub writecoursepref {
5004: my ($courseid,%prefs)=@_;
5005: $courseid=~s/^\///;
5006: $courseid=~s/\_/\//g;
5007: my ($cdomain,$cnum)=split(/\//,$courseid);
5008: my $chome=homeserver($cnum,$cdomain);
5009: if (($chome eq '') || ($chome eq 'no_host')) {
5010: return 'error: no such course';
5011: }
5012: my $cstring='';
5013: foreach my $pref (keys(%prefs)) {
5014: $cstring.=&escape($pref).'='.&escape($prefs{$pref}).'&';
5015: }
5016: $cstring=~s/\&$//;
5017: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
5018: }
5019:
5020: # ---------------------------------------------------------- Make/modify course
5021:
5022: sub createcourse {
5023: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,
5024: $course_owner,$crstype)=@_;
5025: $url=&declutter($url);
5026: my $cid='';
5027: unless (&allowed('ccc',$udom)) {
5028: return 'refused';
5029: }
5030: # ------------------------------------------------------------------- Create ID
5031: my $uname=int(1+rand(9)).
5032: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
5033: substr($$.time,0,5).unpack("H8",pack("I32",time)).
5034: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
5035: # ----------------------------------------------- Make sure that does not exist
5036: my $uhome=&homeserver($uname,$udom,'true');
5037: unless (($uhome eq '') || ($uhome eq 'no_host')) {
5038: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
5039: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
5040: $uhome=&homeserver($uname,$udom,'true');
5041: unless (($uhome eq '') || ($uhome eq 'no_host')) {
5042: return 'error: unable to generate unique course-ID';
5043: }
5044: }
5045: # ------------------------------------------------ Check supplied server name
5046: $course_server = $env{'user.homeserver'} if (! defined($course_server));
5047: if (! &is_library($course_server)) {
5048: return 'error:bad server name '.$course_server;
5049: }
5050: # ------------------------------------------------------------- Make the course
5051: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
5052: $course_server);
5053: unless ($reply eq 'ok') { return 'error: '.$reply; }
5054: $uhome=&homeserver($uname,$udom,'true');
5055: if (($uhome eq '') || ($uhome eq 'no_host')) {
5056: return 'error: no such course';
5057: }
5058: # ----------------------------------------------------------------- Course made
5059: # log existence
5060: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
5061: ':'.&escape($inst_code).':'.&escape($course_owner).':'.
5062: &escape($crstype),$uhome);
5063: &flushcourselogs();
5064: # set toplevel url
5065: my $topurl=$url;
5066: unless ($nonstandard) {
5067: # ------------------------------------------ For standard courses, make top url
5068: my $mapurl=&clutter($url);
5069: if ($mapurl eq '/res/') { $mapurl=''; }
5070: $env{'form.initmap'}=(<<ENDINITMAP);
5071: <map>
5072: <resource id="1" type="start"></resource>
5073: <resource id="2" src="$mapurl"></resource>
5074: <resource id="3" type="finish"></resource>
5075: <link index="1" from="1" to="2"></link>
5076: <link index="2" from="2" to="3"></link>
5077: </map>
5078: ENDINITMAP
5079: $topurl=&declutter(
5080: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
5081: );
5082: }
5083: # ----------------------------------------------------------- Write preferences
5084: &writecoursepref($udom.'_'.$uname,
5085: ('description' => $description,
5086: 'url' => $topurl));
5087: return '/'.$udom.'/'.$uname;
5088: }
5089:
5090: sub is_course {
5091: my ($cdom,$cnum) = @_;
5092: my %courses = &courseiddump($cdom,'.',1,'.','.',$cnum,undef,
5093: undef,'.');
5094: if (exists($courses{$cdom.'_'.$cnum})) {
5095: return 1;
5096: }
5097: return 0;
5098: }
5099:
5100: # ---------------------------------------------------------- Assign Custom Role
5101:
5102: sub assigncustomrole {
5103: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
5104: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
5105: $end,$start,$deleteflag);
5106: }
5107:
5108: # ----------------------------------------------------------------- Revoke Role
5109:
5110: sub revokerole {
5111: my ($udom,$uname,$url,$role,$deleteflag)=@_;
5112: my $now=time;
5113: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
5114: }
5115:
5116: # ---------------------------------------------------------- Revoke Custom Role
5117:
5118: sub revokecustomrole {
5119: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
5120: my $now=time;
5121: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
5122: $deleteflag);
5123: }
5124:
5125: # ------------------------------------------------------------ Disk usage
5126: sub diskusage {
5127: my ($udom,$uname,$directoryRoot)=@_;
5128: $directoryRoot =~ s/\/$//;
5129: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
5130: return $listing;
5131: }
5132:
5133: sub is_locked {
5134: my ($file_name, $domain, $user) = @_;
5135: my @check;
5136: my $is_locked;
5137: push @check, $file_name;
5138: my %locked = &get('file_permissions',\@check,
5139: $env{'user.domain'},$env{'user.name'});
5140: my ($tmp)=keys(%locked);
5141: if ($tmp=~/^error:/) { undef(%locked); }
5142:
5143: if (ref($locked{$file_name}) eq 'ARRAY') {
5144: $is_locked = 'false';
5145: foreach my $entry (@{$locked{$file_name}}) {
5146: if (ref($entry) eq 'ARRAY') {
5147: $is_locked = 'true';
5148: last;
5149: }
5150: }
5151: } else {
5152: $is_locked = 'false';
5153: }
5154: }
5155:
5156: sub declutter_portfile {
5157: my ($file) = @_;
5158: $file =~ s{^(/portfolio/|portfolio/)}{/};
5159: return $file;
5160: }
5161:
5162: # ------------------------------------------------------------- Mark as Read Only
5163:
5164: sub mark_as_readonly {
5165: my ($domain,$user,$files,$what) = @_;
5166: my %current_permissions = &dump('file_permissions',$domain,$user);
5167: my ($tmp)=keys(%current_permissions);
5168: if ($tmp=~/^error:/) { undef(%current_permissions); }
5169: foreach my $file (@{$files}) {
5170: $file = &declutter_portfile($file);
5171: push(@{$current_permissions{$file}},$what);
5172: }
5173: &put('file_permissions',\%current_permissions,$domain,$user);
5174: return;
5175: }
5176:
5177: # ------------------------------------------------------------Save Selected Files
5178:
5179: sub save_selected_files {
5180: my ($user, $path, @files) = @_;
5181: my $filename = $user."savedfiles";
5182: my @other_files = &files_not_in_path($user, $path);
5183: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5184: foreach my $file (@files) {
5185: print (OUT $env{'form.currentpath'}.$file."\n");
5186: }
5187: foreach my $file (@other_files) {
5188: print (OUT $file."\n");
5189: }
5190: close (OUT);
5191: return 'ok';
5192: }
5193:
5194: sub clear_selected_files {
5195: my ($user) = @_;
5196: my $filename = $user."savedfiles";
5197: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5198: print (OUT undef);
5199: close (OUT);
5200: return ("ok");
5201: }
5202:
5203: sub files_in_path {
5204: my ($user, $path) = @_;
5205: my $filename = $user."savedfiles";
5206: my %return_files;
5207: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5208: while (my $line_in = <IN>) {
5209: chomp ($line_in);
5210: my @paths_and_file = split (m!/!, $line_in);
5211: my $file_part = pop (@paths_and_file);
5212: my $path_part = join ('/', @paths_and_file);
5213: $path_part.='/';
5214: my $path_and_file = $path_part.$file_part;
5215: if ($path_part eq $path) {
5216: $return_files{$file_part}= 'selected';
5217: }
5218: }
5219: close (IN);
5220: return (\%return_files);
5221: }
5222:
5223: # called in portfolio select mode, to show files selected NOT in current directory
5224: sub files_not_in_path {
5225: my ($user, $path) = @_;
5226: my $filename = $user."savedfiles";
5227: my @return_files;
5228: my $path_part;
5229: open(IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5230: while (my $line = <IN>) {
5231: #ok, I know it's clunky, but I want it to work
5232: my @paths_and_file = split(m|/|, $line);
5233: my $file_part = pop(@paths_and_file);
5234: chomp($file_part);
5235: my $path_part = join('/', @paths_and_file);
5236: $path_part .= '/';
5237: my $path_and_file = $path_part.$file_part;
5238: if ($path_part ne $path) {
5239: push(@return_files, ($path_and_file));
5240: }
5241: }
5242: close(OUT);
5243: return (@return_files);
5244: }
5245:
5246: #----------------------------------------------Get portfolio file permissions
5247:
5248: sub get_portfile_permissions {
5249: my ($domain,$user) = @_;
5250: my %current_permissions = &dump('file_permissions',$domain,$user);
5251: my ($tmp)=keys(%current_permissions);
5252: if ($tmp=~/^error:/) { undef(%current_permissions); }
5253: return \%current_permissions;
5254: }
5255:
5256: #---------------------------------------------Get portfolio file access controls
5257:
5258: sub get_access_controls {
5259: my ($current_permissions,$group,$file) = @_;
5260: my %access;
5261: my $real_file = $file;
5262: $file =~ s/\.meta$//;
5263: if (defined($file)) {
5264: if (ref($$current_permissions{$file."\0".'accesscontrol'}) eq 'HASH') {
5265: foreach my $control (keys(%{$$current_permissions{$file."\0".'accesscontrol'}})) {
5266: $access{$real_file}{$control} = $$current_permissions{$file."\0".$control};
5267: }
5268: }
5269: } else {
5270: foreach my $key (keys(%{$current_permissions})) {
5271: if ($key =~ /\0accesscontrol$/) {
5272: if (defined($group)) {
5273: if ($key !~ m-^\Q$group\E/-) {
5274: next;
5275: }
5276: }
5277: my ($fullpath) = split(/\0/,$key);
5278: if (ref($$current_permissions{$key}) eq 'HASH') {
5279: foreach my $control (keys(%{$$current_permissions{$key}})) {
5280: $access{$fullpath}{$control}=$$current_permissions{$fullpath."\0".$control};
5281: }
5282: }
5283: }
5284: }
5285: }
5286: return %access;
5287: }
5288:
5289: sub modify_access_controls {
5290: my ($file_name,$changes,$domain,$user)=@_;
5291: my ($outcome,$deloutcome);
5292: my %store_permissions;
5293: my %new_values;
5294: my %new_control;
5295: my %translation;
5296: my @deletions = ();
5297: my $now = time;
5298: if (exists($$changes{'activate'})) {
5299: if (ref($$changes{'activate'}) eq 'HASH') {
5300: my @newitems = sort(keys(%{$$changes{'activate'}}));
5301: my $numnew = scalar(@newitems);
5302: for (my $i=0; $i<$numnew; $i++) {
5303: my $newkey = $newitems[$i];
5304: my $newid = &Apache::loncommon::get_cgi_id();
5305: if ($newkey =~ /^\d+:/) {
5306: $newkey =~ s/^(\d+)/$newid/;
5307: $translation{$1} = $newid;
5308: } elsif ($newkey =~ /^\d+_\d+_\d+:/) {
5309: $newkey =~ s/^(\d+_\d+_\d+)/$newid/;
5310: $translation{$1} = $newid;
5311: }
5312: $new_values{$file_name."\0".$newkey} =
5313: $$changes{'activate'}{$newitems[$i]};
5314: $new_control{$newkey} = $now;
5315: }
5316: }
5317: }
5318: my %todelete;
5319: my %changed_items;
5320: foreach my $action ('delete','update') {
5321: if (exists($$changes{$action})) {
5322: if (ref($$changes{$action}) eq 'HASH') {
5323: foreach my $key (keys(%{$$changes{$action}})) {
5324: my ($itemnum) = ($key =~ /^([^:]+):/);
5325: if ($action eq 'delete') {
5326: $todelete{$itemnum} = 1;
5327: } else {
5328: $changed_items{$itemnum} = $key;
5329: }
5330: }
5331: }
5332: }
5333: }
5334: # get lock on access controls for file.
5335: my $lockhash = {
5336: $file_name."\0".'locked_access_records' => $env{'user.name'}.
5337: ':'.$env{'user.domain'},
5338: };
5339: my $tries = 0;
5340: my $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5341:
5342: while (($gotlock ne 'ok') && $tries <3) {
5343: $tries ++;
5344: sleep 1;
5345: $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5346: }
5347: if ($gotlock eq 'ok') {
5348: my %curr_permissions = &dump('file_permissions',$domain,$user,$file_name);
5349: my ($tmp)=keys(%curr_permissions);
5350: if ($tmp=~/^error:/) { undef(%curr_permissions); }
5351: if (exists($curr_permissions{$file_name."\0".'accesscontrol'})) {
5352: my $curr_controls = $curr_permissions{$file_name."\0".'accesscontrol'};
5353: if (ref($curr_controls) eq 'HASH') {
5354: foreach my $control_item (keys(%{$curr_controls})) {
5355: my ($itemnum) = ($control_item =~ /^([^:]+):/);
5356: if (defined($todelete{$itemnum})) {
5357: push(@deletions,$file_name."\0".$control_item);
5358: } else {
5359: if (defined($changed_items{$itemnum})) {
5360: $new_control{$changed_items{$itemnum}} = $now;
5361: push(@deletions,$file_name."\0".$control_item);
5362: $new_values{$file_name."\0".$changed_items{$itemnum}} = $$changes{'update'}{$changed_items{$itemnum}};
5363: } else {
5364: $new_control{$control_item} = $$curr_controls{$control_item};
5365: }
5366: }
5367: }
5368: }
5369: }
5370: $deloutcome = &del('file_permissions',\@deletions,$domain,$user);
5371: $new_values{$file_name."\0".'accesscontrol'} = \%new_control;
5372: $outcome = &put('file_permissions',\%new_values,$domain,$user);
5373: # remove lock
5374: my @del_lock = ($file_name."\0".'locked_access_records');
5375: my $dellockoutcome = &del('file_permissions',\@del_lock,$domain,$user);
5376: my ($file,$group);
5377: if (&is_course($domain,$user)) {
5378: ($group,$file) = split(/\//,$file_name,2);
5379: } else {
5380: $file = $file_name;
5381: }
5382: my $sqlresult =
5383: &update_portfolio_table($user,$domain,$file,'portfolio_access',
5384: $group);
5385: } else {
5386: $outcome = "error: could not obtain lockfile\n";
5387: }
5388: return ($outcome,$deloutcome,\%new_values,\%translation);
5389: }
5390:
5391: sub make_public_indefinitely {
5392: my ($requrl) = @_;
5393: my $now = time;
5394: my $action = 'activate';
5395: my $aclnum = 0;
5396: if (&is_portfolio_url($requrl)) {
5397: my (undef,$udom,$unum,$file_name,$group) =
5398: &parse_portfolio_url($requrl);
5399: my $current_perms = &get_portfile_permissions($udom,$unum);
5400: my %access_controls = &get_access_controls($current_perms,
5401: $group,$file_name);
5402: foreach my $key (keys(%{$access_controls{$file_name}})) {
5403: my ($num,$scope,$end,$start) =
5404: ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
5405: if ($scope eq 'public') {
5406: if ($start <= $now && $end == 0) {
5407: $action = 'none';
5408: } else {
5409: $action = 'update';
5410: $aclnum = $num;
5411: }
5412: last;
5413: }
5414: }
5415: if ($action eq 'none') {
5416: return 'ok';
5417: } else {
5418: my %changes;
5419: my $newend = 0;
5420: my $newstart = $now;
5421: my $newkey = $aclnum.':public_'.$newend.'_'.$newstart;
5422: $changes{$action}{$newkey} = {
5423: type => 'public',
5424: time => {
5425: start => $newstart,
5426: end => $newend,
5427: },
5428: };
5429: my ($outcome,$deloutcome,$new_values,$translation) =
5430: &modify_access_controls($file_name,\%changes,$udom,$unum);
5431: return $outcome;
5432: }
5433: } else {
5434: return 'invalid';
5435: }
5436: }
5437:
5438: #------------------------------------------------------Get Marked as Read Only
5439:
5440: sub get_marked_as_readonly {
5441: my ($domain,$user,$what,$group) = @_;
5442: my $current_permissions = &get_portfile_permissions($domain,$user);
5443: my @readonly_files;
5444: my $cmp1=$what;
5445: if (ref($what)) { $cmp1=join('',@{$what}) };
5446: while (my ($file_name,$value) = each(%{$current_permissions})) {
5447: if (defined($group)) {
5448: if ($file_name !~ m-^\Q$group\E/-) {
5449: next;
5450: }
5451: }
5452: if (ref($value) eq "ARRAY"){
5453: foreach my $stored_what (@{$value}) {
5454: my $cmp2=$stored_what;
5455: if (ref($stored_what) eq 'ARRAY') {
5456: $cmp2=join('',@{$stored_what});
5457: }
5458: if ($cmp1 eq $cmp2) {
5459: push(@readonly_files, $file_name);
5460: last;
5461: } elsif (!defined($what)) {
5462: push(@readonly_files, $file_name);
5463: last;
5464: }
5465: }
5466: }
5467: }
5468: return @readonly_files;
5469: }
5470: #-----------------------------------------------------------Get Marked as Read Only Hash
5471:
5472: sub get_marked_as_readonly_hash {
5473: my ($current_permissions,$group,$what) = @_;
5474: my %readonly_files;
5475: while (my ($file_name,$value) = each(%{$current_permissions})) {
5476: if (defined($group)) {
5477: if ($file_name !~ m-^\Q$group\E/-) {
5478: next;
5479: }
5480: }
5481: if (ref($value) eq "ARRAY"){
5482: foreach my $stored_what (@{$value}) {
5483: if (ref($stored_what) eq 'ARRAY') {
5484: foreach my $lock_descriptor(@{$stored_what}) {
5485: if ($lock_descriptor eq 'graded') {
5486: $readonly_files{$file_name} = 'graded';
5487: } elsif ($lock_descriptor eq 'handback') {
5488: $readonly_files{$file_name} = 'handback';
5489: } else {
5490: if (!exists($readonly_files{$file_name})) {
5491: $readonly_files{$file_name} = 'locked';
5492: }
5493: }
5494: }
5495: }
5496: }
5497: }
5498: }
5499: return %readonly_files;
5500: }
5501: # ------------------------------------------------------------ Unmark as Read Only
5502:
5503: sub unmark_as_readonly {
5504: # unmarks $file_name (if $file_name is defined), or all files locked by $what
5505: # for portfolio submissions, $what contains [$symb,$crsid]
5506: my ($domain,$user,$what,$file_name,$group) = @_;
5507: $file_name = &declutter_portfile($file_name);
5508: my $symb_crs = $what;
5509: if (ref($what)) { $symb_crs=join('',@$what); }
5510: my %current_permissions = &dump('file_permissions',$domain,$user,$group);
5511: my ($tmp)=keys(%current_permissions);
5512: if ($tmp=~/^error:/) { undef(%current_permissions); }
5513: my @readonly_files = &get_marked_as_readonly($domain,$user,$what,$group);
5514: foreach my $file (@readonly_files) {
5515: my $clean_file = &declutter_portfile($file);
5516: if (defined($file_name) && ($file_name ne $clean_file)) { next; }
5517: my $current_locks = $current_permissions{$file};
5518: my @new_locks;
5519: my @del_keys;
5520: if (ref($current_locks) eq "ARRAY"){
5521: foreach my $locker (@{$current_locks}) {
5522: my $compare=$locker;
5523: if (ref($locker) eq 'ARRAY') {
5524: $compare=join('',@{$locker});
5525: if ($compare ne $symb_crs) {
5526: push(@new_locks, $locker);
5527: }
5528: }
5529: }
5530: if (scalar(@new_locks) > 0) {
5531: $current_permissions{$file} = \@new_locks;
5532: } else {
5533: push(@del_keys, $file);
5534: &del('file_permissions',\@del_keys, $domain, $user);
5535: delete($current_permissions{$file});
5536: }
5537: }
5538: }
5539: &put('file_permissions',\%current_permissions,$domain,$user);
5540: return;
5541: }
5542:
5543: # ------------------------------------------------------------ Directory lister
5544:
5545: sub dirlist {
5546: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
5547:
5548: $uri=~s/^\///;
5549: $uri=~s/\/$//;
5550: my ($udom, $uname);
5551: (undef,$udom,$uname)=split(/\//,$uri);
5552: if(defined($userdomain)) {
5553: $udom = $userdomain;
5554: }
5555: if(defined($username)) {
5556: $uname = $username;
5557: }
5558:
5559: my $dirRoot = $perlvar{'lonDocRoot'};
5560: if(defined($alternateDirectoryRoot)) {
5561: $dirRoot = $alternateDirectoryRoot;
5562: $dirRoot =~ s/\/$//;
5563: }
5564:
5565: if($udom) {
5566: if($uname) {
5567: my $listing = &reply('ls2:'.$dirRoot.'/'.$uri,
5568: &homeserver($uname,$udom));
5569: my @listing_results;
5570: if ($listing eq 'unknown_cmd') {
5571: $listing = &reply('ls:'.$dirRoot.'/'.$uri,
5572: &homeserver($uname,$udom));
5573: @listing_results = split(/:/,$listing);
5574: } else {
5575: @listing_results = map { &unescape($_); } split(/:/,$listing);
5576: }
5577: return @listing_results;
5578: } elsif(!defined($alternateDirectoryRoot)) {
5579: my %allusers;
5580: my %servers = &get_servers($udom,'library');
5581: foreach my $tryserver (keys(%servers)) {
5582: my $listing = &reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
5583: $udom, $tryserver);
5584: my @listing_results;
5585: if ($listing eq 'unknown_cmd') {
5586: $listing = &reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
5587: $udom, $tryserver);
5588: @listing_results = split(/:/,$listing);
5589: } else {
5590: @listing_results =
5591: map { &unescape($_); } split(/:/,$listing);
5592: }
5593: if ($listing_results[0] ne 'no_such_dir' &&
5594: $listing_results[0] ne 'empty' &&
5595: $listing_results[0] ne 'con_lost') {
5596: foreach my $line (@listing_results) {
5597: my ($entry) = split(/&/,$line,2);
5598: $allusers{$entry} = 1;
5599: }
5600: }
5601: }
5602: my $alluserstr='';
5603: foreach my $user (sort(keys(%allusers))) {
5604: $alluserstr.=$user.'&user:';
5605: }
5606: $alluserstr=~s/:$//;
5607: return split(/:/,$alluserstr);
5608: } else {
5609: return ('missing user name');
5610: }
5611: } elsif(!defined($alternateDirectoryRoot)) {
5612: my @all_domains = sort(&all_domains());
5613: foreach my $domain (@all_domains) {
5614: $domain = $perlvar{'lonDocRoot'}.'/res/'.$domain.'/&domain';
5615: }
5616: return @all_domains;
5617: } else {
5618: return ('missing domain');
5619: }
5620: }
5621:
5622: # --------------------------------------------- GetFileTimestamp
5623: # This function utilizes dirlist and returns the date stamp for
5624: # when it was last modified. It will also return an error of -1
5625: # if an error occurs
5626:
5627: ##
5628: ## FIXME: This subroutine assumes its caller knows something about the
5629: ## directory structure of the home server for the student ($root).
5630: ## Not a good assumption to make. Since this is for looking up files
5631: ## in user directories, the full path should be constructed by lond, not
5632: ## whatever machine we request data from.
5633: ##
5634: sub GetFileTimestamp {
5635: my ($studentDomain,$studentName,$filename,$root)=@_;
5636: $studentDomain = &LONCAPA::clean_domain($studentDomain);
5637: $studentName = &LONCAPA::clean_username($studentName);
5638: my $subdir=$studentName.'__';
5639: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
5640: my $proname="$studentDomain/$subdir/$studentName";
5641: $proname .= '/'.$filename;
5642: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
5643: $studentName, $root);
5644: my @stats = split('&', $fileStat);
5645: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5646: # @stats contains first the filename, then the stat output
5647: return $stats[10]; # so this is 10 instead of 9.
5648: } else {
5649: return -1;
5650: }
5651: }
5652:
5653: sub stat_file {
5654: my ($uri) = @_;
5655: $uri = &clutter_with_no_wrapper($uri);
5656:
5657: my ($udom,$uname,$file,$dir);
5658: if ($uri =~ m-^/(uploaded|editupload)/-) {
5659: ($udom,$uname,$file) =
5660: ($uri =~ m-/(?:uploaded|editupload)/?($match_domain)/?($match_name)/?(.*)-);
5661: $file = 'userfiles/'.$file;
5662: $dir = &propath($udom,$uname);
5663: }
5664: if ($uri =~ m-^/res/-) {
5665: ($udom,$uname) =
5666: ($uri =~ m-/(?:res)/?($match_domain)/?($match_username)/-);
5667: $file = $uri;
5668: }
5669:
5670: if (!$udom || !$uname || !$file) {
5671: # unable to handle the uri
5672: return ();
5673: }
5674:
5675: my ($result) = &dirlist($file,$udom,$uname,$dir);
5676: my @stats = split('&', $result);
5677:
5678: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5679: shift(@stats); #filename is first
5680: return @stats;
5681: }
5682: return ();
5683: }
5684:
5685: # -------------------------------------------------------- Value of a Condition
5686:
5687: # gets the value of a specific preevaluated condition
5688: # stored in the string $env{user.state.<cid>}
5689: # or looks up a condition reference in the bighash and if if hasn't
5690: # already been evaluated recurses into docondval to get the value of
5691: # the condition, then memoizing it to
5692: # $env{user.state.<cid>.<condition>}
5693: sub directcondval {
5694: my $number=shift;
5695: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
5696: &Apache::lonuserstate::evalstate();
5697: }
5698: if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
5699: return $env{'user.state.'.$env{'request.course.id'}.".$number"};
5700: } elsif ($number =~ /^_/) {
5701: my $sub_condition;
5702: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5703: &GDBM_READER(),0640)) {
5704: $sub_condition=$bighash{'conditions'.$number};
5705: untie(%bighash);
5706: }
5707: my $value = &docondval($sub_condition);
5708: &appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
5709: return $value;
5710: }
5711: if ($env{'user.state.'.$env{'request.course.id'}}) {
5712: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
5713: } else {
5714: return 2;
5715: }
5716: }
5717:
5718: # get the collection of conditions for this resource
5719: sub condval {
5720: my $condidx=shift;
5721: my $allpathcond='';
5722: foreach my $cond (split(/\|/,$condidx)) {
5723: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
5724: $allpathcond.=
5725: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
5726: }
5727: }
5728: $allpathcond=~s/\|$//;
5729: return &docondval($allpathcond);
5730: }
5731:
5732: #evaluates an expression of conditions
5733: sub docondval {
5734: my ($allpathcond) = @_;
5735: my $result=0;
5736: if ($env{'request.course.id'}
5737: && defined($allpathcond)) {
5738: my $operand='|';
5739: my @stack;
5740: foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
5741: if ($chunk eq '(') {
5742: push @stack,($operand,$result);
5743: } elsif ($chunk eq ')') {
5744: my $before=pop @stack;
5745: if (pop @stack eq '&') {
5746: $result=$result>$before?$before:$result;
5747: } else {
5748: $result=$result>$before?$result:$before;
5749: }
5750: } elsif (($chunk eq '&') || ($chunk eq '|')) {
5751: $operand=$chunk;
5752: } else {
5753: my $new=directcondval($chunk);
5754: if ($operand eq '&') {
5755: $result=$result>$new?$new:$result;
5756: } else {
5757: $result=$result>$new?$result:$new;
5758: }
5759: }
5760: }
5761: }
5762: return $result;
5763: }
5764:
5765: # ---------------------------------------------------- Devalidate courseresdata
5766:
5767: sub devalidatecourseresdata {
5768: my ($coursenum,$coursedomain)=@_;
5769: my $hashid=$coursenum.':'.$coursedomain;
5770: &devalidate_cache_new('courseres',$hashid);
5771: }
5772:
5773:
5774: # --------------------------------------------------- Course Resourcedata Query
5775:
5776: sub get_courseresdata {
5777: my ($coursenum,$coursedomain)=@_;
5778: my $coursehom=&homeserver($coursenum,$coursedomain);
5779: my $hashid=$coursenum.':'.$coursedomain;
5780: my ($result,$cached)=&is_cached_new('courseres',$hashid);
5781: my %dumpreply;
5782: unless (defined($cached)) {
5783: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
5784: $result=\%dumpreply;
5785: my ($tmp) = keys(%dumpreply);
5786: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
5787: &do_cache_new('courseres',$hashid,$result,600);
5788: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
5789: return $tmp;
5790: } elsif ($tmp =~ /^(error)/) {
5791: $result=undef;
5792: &do_cache_new('courseres',$hashid,$result,600);
5793: }
5794: }
5795: return $result;
5796: }
5797:
5798: sub devalidateuserresdata {
5799: my ($uname,$udom)=@_;
5800: my $hashid="$udom:$uname";
5801: &devalidate_cache_new('userres',$hashid);
5802: }
5803:
5804: sub get_userresdata {
5805: my ($uname,$udom)=@_;
5806: #most student don\'t have any data set, check if there is some data
5807: if (&EXT_cache_status($udom,$uname)) { return undef; }
5808:
5809: my $hashid="$udom:$uname";
5810: my ($result,$cached)=&is_cached_new('userres',$hashid);
5811: if (!defined($cached)) {
5812: my %resourcedata=&dump('resourcedata',$udom,$uname);
5813: $result=\%resourcedata;
5814: &do_cache_new('userres',$hashid,$result,600);
5815: }
5816: my ($tmp)=keys(%$result);
5817: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
5818: return $result;
5819: }
5820: #error 2 occurs when the .db doesn't exist
5821: if ($tmp!~/error: 2 /) {
5822: &logthis("<font color=\"blue\">WARNING:".
5823: " Trying to get resource data for ".
5824: $uname." at ".$udom.": ".
5825: $tmp."</font>");
5826: } elsif ($tmp=~/error: 2 /) {
5827: #&EXT_cache_set($udom,$uname);
5828: &do_cache_new('userres',$hashid,undef,600);
5829: undef($tmp); # not really an error so don't send it back
5830: }
5831: return $tmp;
5832: }
5833:
5834: sub resdata {
5835: my ($name,$domain,$type,@which)=@_;
5836: my $result;
5837: if ($type eq 'course') {
5838: $result=&get_courseresdata($name,$domain);
5839: } elsif ($type eq 'user') {
5840: $result=&get_userresdata($name,$domain);
5841: }
5842: if (!ref($result)) { return $result; }
5843: foreach my $item (@which) {
5844: if (defined($result->{$item})) {
5845: return $result->{$item};
5846: }
5847: }
5848: return undef;
5849: }
5850:
5851: #
5852: # EXT resource caching routines
5853: #
5854:
5855: sub clear_EXT_cache_status {
5856: &delenv('cache.EXT.');
5857: }
5858:
5859: sub EXT_cache_status {
5860: my ($target_domain,$target_user) = @_;
5861: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5862: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
5863: # We know already the user has no data
5864: return 1;
5865: } else {
5866: return 0;
5867: }
5868: }
5869:
5870: sub EXT_cache_set {
5871: my ($target_domain,$target_user) = @_;
5872: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5873: #&appenv($cachename => time);
5874: }
5875:
5876: # --------------------------------------------------------- Value of a Variable
5877: sub EXT {
5878:
5879: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
5880: unless ($varname) { return ''; }
5881: #get real user name/domain, courseid and symb
5882: my $courseid;
5883: my $publicuser;
5884: if ($symbparm) {
5885: $symbparm=&get_symb_from_alias($symbparm);
5886: }
5887: if (!($uname && $udom)) {
5888: (my $cursymb,$courseid,$udom,$uname,$publicuser)= &whichuser($symbparm);
5889: if (!$symbparm) { $symbparm=$cursymb; }
5890: } else {
5891: $courseid=$env{'request.course.id'};
5892: }
5893: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
5894: my $rest;
5895: if (defined($therest[0])) {
5896: $rest=join('.',@therest);
5897: } else {
5898: $rest='';
5899: }
5900:
5901: my $qualifierrest=$qualifier;
5902: if ($rest) { $qualifierrest.='.'.$rest; }
5903: my $spacequalifierrest=$space;
5904: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
5905: if ($realm eq 'user') {
5906: # --------------------------------------------------------------- user.resource
5907: if ($space eq 'resource') {
5908: if ( (defined($Apache::lonhomework::parsing_a_problem)
5909: || defined($Apache::lonhomework::parsing_a_task))
5910: &&
5911: ($symbparm eq &symbread()) ) {
5912: # if we are in the middle of processing the resource the
5913: # get the value we are planning on committing
5914: if (defined($Apache::lonhomework::results{$qualifierrest})) {
5915: return $Apache::lonhomework::results{$qualifierrest};
5916: } else {
5917: return $Apache::lonhomework::history{$qualifierrest};
5918: }
5919: } else {
5920: my %restored;
5921: if ($publicuser || $env{'request.state'} eq 'construct') {
5922: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
5923: } else {
5924: %restored=&restore($symbparm,$courseid,$udom,$uname);
5925: }
5926: return $restored{$qualifierrest};
5927: }
5928: # ----------------------------------------------------------------- user.access
5929: } elsif ($space eq 'access') {
5930: # FIXME - not supporting calls for a specific user
5931: return &allowed($qualifier,$rest);
5932: # ------------------------------------------ user.preferences, user.environment
5933: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
5934: if (($uname eq $env{'user.name'}) &&
5935: ($udom eq $env{'user.domain'})) {
5936: return $env{join('.',('environment',$qualifierrest))};
5937: } else {
5938: my %returnhash;
5939: if (!$publicuser) {
5940: %returnhash=&userenvironment($udom,$uname,
5941: $qualifierrest);
5942: }
5943: return $returnhash{$qualifierrest};
5944: }
5945: # ----------------------------------------------------------------- user.course
5946: } elsif ($space eq 'course') {
5947: # FIXME - not supporting calls for a specific user
5948: return $env{join('.',('request.course',$qualifier))};
5949: # ------------------------------------------------------------------- user.role
5950: } elsif ($space eq 'role') {
5951: # FIXME - not supporting calls for a specific user
5952: my ($role,$where)=split(/\./,$env{'request.role'});
5953: if ($qualifier eq 'value') {
5954: return $role;
5955: } elsif ($qualifier eq 'extent') {
5956: return $where;
5957: }
5958: # ----------------------------------------------------------------- user.domain
5959: } elsif ($space eq 'domain') {
5960: return $udom;
5961: # ------------------------------------------------------------------- user.name
5962: } elsif ($space eq 'name') {
5963: return $uname;
5964: # ---------------------------------------------------- Any other user namespace
5965: } else {
5966: my %reply;
5967: if (!$publicuser) {
5968: %reply=&get($space,[$qualifierrest],$udom,$uname);
5969: }
5970: return $reply{$qualifierrest};
5971: }
5972: } elsif ($realm eq 'query') {
5973: # ---------------------------------------------- pull stuff out of query string
5974: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
5975: [$spacequalifierrest]);
5976: return $env{'form.'.$spacequalifierrest};
5977: } elsif ($realm eq 'request') {
5978: # ------------------------------------------------------------- request.browser
5979: if ($space eq 'browser') {
5980: if ($qualifier eq 'textremote') {
5981: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
5982: return 1;
5983: } else {
5984: return 0;
5985: }
5986: } else {
5987: return $env{'browser.'.$qualifier};
5988: }
5989: # ------------------------------------------------------------ request.filename
5990: } else {
5991: return $env{'request.'.$spacequalifierrest};
5992: }
5993: } elsif ($realm eq 'course') {
5994: # ---------------------------------------------------------- course.description
5995: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
5996: } elsif ($realm eq 'resource') {
5997:
5998: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
5999: if (!$symbparm) { $symbparm=&symbread(); }
6000: }
6001:
6002: if ($space eq 'title') {
6003: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
6004: return &gettitle($symbparm);
6005: }
6006:
6007: if ($space eq 'map') {
6008: my ($map) = &decode_symb($symbparm);
6009: return &symbread($map);
6010: }
6011:
6012: my ($section, $group, @groups);
6013: my ($courselevelm,$courselevel);
6014: if ($symbparm && defined($courseid) &&
6015: $courseid eq $env{'request.course.id'}) {
6016:
6017: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
6018:
6019: # ----------------------------------------------------- Cascading lookup scheme
6020: my $symbp=$symbparm;
6021: my $mapp=&deversion((&decode_symb($symbp))[0]);
6022:
6023: my $symbparm=$symbp.'.'.$spacequalifierrest;
6024: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
6025:
6026: if (($env{'user.name'} eq $uname) &&
6027: ($env{'user.domain'} eq $udom)) {
6028: $section=$env{'request.course.sec'};
6029: @groups = split(/:/,$env{'request.course.groups'});
6030: @groups=&sort_course_groups($courseid,@groups);
6031: } else {
6032: if (! defined($usection)) {
6033: $section=&getsection($udom,$uname,$courseid);
6034: } else {
6035: $section = $usection;
6036: }
6037: @groups = &get_users_groups($udom,$uname,$courseid);
6038: }
6039:
6040: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
6041: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
6042: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
6043:
6044: $courselevel=$courseid.'.'.$spacequalifierrest;
6045: my $courselevelr=$courseid.'.'.$symbparm;
6046: $courselevelm=$courseid.'.'.$mapparm;
6047:
6048: # ----------------------------------------------------------- first, check user
6049:
6050: my $userreply=&resdata($uname,$udom,'user',
6051: ($courselevelr,$courselevelm,
6052: $courselevel));
6053: if (defined($userreply)) { return $userreply; }
6054:
6055: # ------------------------------------------------ second, check some of course
6056: my $coursereply;
6057: if (@groups > 0) {
6058: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
6059: $mapparm,$spacequalifierrest);
6060: if (defined($coursereply)) { return $coursereply; }
6061: }
6062:
6063: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
6064: $env{'course.'.$courseid.'.domain'},
6065: 'course',
6066: ($seclevelr,$seclevelm,$seclevel,
6067: $courselevelr));
6068: if (defined($coursereply)) { return $coursereply; }
6069:
6070: # ------------------------------------------------------ third, check map parms
6071: my %parmhash=();
6072: my $thisparm='';
6073: if (tie(%parmhash,'GDBM_File',
6074: $env{'request.course.fn'}.'_parms.db',
6075: &GDBM_READER(),0640)) {
6076: $thisparm=$parmhash{$symbparm};
6077: untie(%parmhash);
6078: }
6079: if ($thisparm) { return $thisparm; }
6080: }
6081: # ------------------------------------------ fourth, look in resource metadata
6082:
6083: $spacequalifierrest=~s/\./\_/;
6084: my $filename;
6085: if (!$symbparm) { $symbparm=&symbread(); }
6086: if ($symbparm) {
6087: $filename=(&decode_symb($symbparm))[2];
6088: } else {
6089: $filename=$env{'request.filename'};
6090: }
6091: my $metadata=&metadata($filename,$spacequalifierrest);
6092: if (defined($metadata)) { return $metadata; }
6093: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
6094: if (defined($metadata)) { return $metadata; }
6095:
6096: # ---------------------------------------------- fourth, look in rest pf course
6097: if ($symbparm && defined($courseid) &&
6098: $courseid eq $env{'request.course.id'}) {
6099: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
6100: $env{'course.'.$courseid.'.domain'},
6101: 'course',
6102: ($courselevelm,$courselevel));
6103: if (defined($coursereply)) { return $coursereply; }
6104: }
6105: # ------------------------------------------------------------------ Cascade up
6106: unless ($space eq '0') {
6107: my @parts=split(/_/,$space);
6108: my $id=pop(@parts);
6109: my $part=join('_',@parts);
6110: if ($part eq '') { $part='0'; }
6111: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
6112: $symbparm,$udom,$uname,$section,1);
6113: if (defined($partgeneral)) { return $partgeneral; }
6114: }
6115: if ($recurse) { return undef; }
6116: my $pack_def=&packages_tab_default($filename,$varname);
6117: if (defined($pack_def)) { return $pack_def; }
6118:
6119: # ---------------------------------------------------- Any other user namespace
6120: } elsif ($realm eq 'environment') {
6121: # ----------------------------------------------------------------- environment
6122: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
6123: return $env{'environment.'.$spacequalifierrest};
6124: } else {
6125: if ($uname eq 'anonymous' && $udom eq '') {
6126: return '';
6127: }
6128: my %returnhash=&userenvironment($udom,$uname,
6129: $spacequalifierrest);
6130: return $returnhash{$spacequalifierrest};
6131: }
6132: } elsif ($realm eq 'system') {
6133: # ----------------------------------------------------------------- system.time
6134: if ($space eq 'time') {
6135: return time;
6136: }
6137: } elsif ($realm eq 'server') {
6138: # ----------------------------------------------------------------- system.time
6139: if ($space eq 'name') {
6140: return $ENV{'SERVER_NAME'};
6141: }
6142: }
6143: return '';
6144: }
6145:
6146: sub check_group_parms {
6147: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
6148: my @groupitems = ();
6149: my $resultitem;
6150: my @levels = ($symbparm,$mapparm,$what);
6151: foreach my $group (@{$groups}) {
6152: foreach my $level (@levels) {
6153: my $item = $courseid.'.['.$group.'].'.$level;
6154: push(@groupitems,$item);
6155: }
6156: }
6157: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
6158: $env{'course.'.$courseid.'.domain'},
6159: 'course',@groupitems);
6160: return $coursereply;
6161: }
6162:
6163: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
6164: my ($courseid,@groups) = @_;
6165: @groups = sort(@groups);
6166: return @groups;
6167: }
6168:
6169: sub packages_tab_default {
6170: my ($uri,$varname)=@_;
6171: my (undef,$part,$name)=split(/\./,$varname);
6172:
6173: my (@extension,@specifics,$do_default);
6174: foreach my $package (split(/,/,&metadata($uri,'packages'))) {
6175: my ($pack_type,$pack_part)=split(/_/,$package,2);
6176: if ($pack_type eq 'default') {
6177: $do_default=1;
6178: } elsif ($pack_type eq 'extension') {
6179: push(@extension,[$package,$pack_type,$pack_part]);
6180: } else {
6181: push(@specifics,[$package,$pack_type,$pack_part]);
6182: }
6183: }
6184: # first look for a package that matches the requested part id
6185: foreach my $package (@specifics) {
6186: my (undef,$pack_type,$pack_part)=@{$package};
6187: next if ($pack_part ne $part);
6188: if (defined($packagetab{"$pack_type&$name&default"})) {
6189: return $packagetab{"$pack_type&$name&default"};
6190: }
6191: }
6192: # look for any possible matching non extension_ package
6193: foreach my $package (@specifics) {
6194: my (undef,$pack_type,$pack_part)=@{$package};
6195: if (defined($packagetab{"$pack_type&$name&default"})) {
6196: return $packagetab{"$pack_type&$name&default"};
6197: }
6198: if ($pack_type eq 'part') { $pack_part='0'; }
6199: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
6200: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
6201: }
6202: }
6203: # look for any posible extension_ match
6204: foreach my $package (@extension) {
6205: my ($package,$pack_type)=@{$package};
6206: if (defined($packagetab{"$pack_type&$name&default"})) {
6207: return $packagetab{"$pack_type&$name&default"};
6208: }
6209: if (defined($packagetab{$package."&$name&default"})) {
6210: return $packagetab{$package."&$name&default"};
6211: }
6212: }
6213: # look for a global default setting
6214: if ($do_default && defined($packagetab{"default&$name&default"})) {
6215: return $packagetab{"default&$name&default"};
6216: }
6217: return undef;
6218: }
6219:
6220: sub add_prefix_and_part {
6221: my ($prefix,$part)=@_;
6222: my $keyroot;
6223: if (defined($prefix) && $prefix !~ /^__/) {
6224: # prefix that has a part already
6225: $keyroot=$prefix;
6226: } elsif (defined($prefix)) {
6227: # prefix that is missing a part
6228: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
6229: } else {
6230: # no prefix at all
6231: if (defined($part)) { $keyroot='_'.$part; }
6232: }
6233: return $keyroot;
6234: }
6235:
6236: # ---------------------------------------------------------------- Get metadata
6237:
6238: my %metaentry;
6239: sub metadata {
6240: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
6241: $uri=&declutter($uri);
6242: # if it is a non metadata possible uri return quickly
6243: if (($uri eq '') ||
6244: (($uri =~ m|^/*adm/|) &&
6245: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
6246: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
6247: ($uri =~ m|home/$match_username/public_html/|)) {
6248: return undef;
6249: }
6250: my $filename=$uri;
6251: $uri=~s/\.meta$//;
6252: #
6253: # Is the metadata already cached?
6254: # Look at timestamp of caching
6255: # Everything is cached by the main uri, libraries are never directly cached
6256: #
6257: if (!defined($liburi)) {
6258: my ($result,$cached)=&is_cached_new('meta',$uri);
6259: if (defined($cached)) { return $result->{':'.$what}; }
6260: }
6261: {
6262: #
6263: # Is this a recursive call for a library?
6264: #
6265: # if (! exists($metacache{$uri})) {
6266: # $metacache{$uri}={};
6267: # }
6268: if ($liburi) {
6269: $liburi=&declutter($liburi);
6270: $filename=$liburi;
6271: } else {
6272: &devalidate_cache_new('meta',$uri);
6273: undef(%metaentry);
6274: }
6275: my %metathesekeys=();
6276: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
6277: my $metastring;
6278: if ($uri !~ m -^(editupload)/-) {
6279: my $file=&filelocation('',&clutter($filename));
6280: #push(@{$metaentry{$uri.'.file'}},$file);
6281: $metastring=&getfile($file);
6282: }
6283: my $parser=HTML::LCParser->new(\$metastring);
6284: my $token;
6285: undef %metathesekeys;
6286: while ($token=$parser->get_token) {
6287: if ($token->[0] eq 'S') {
6288: if (defined($token->[2]->{'package'})) {
6289: #
6290: # This is a package - get package info
6291: #
6292: my $package=$token->[2]->{'package'};
6293: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6294: if (defined($token->[2]->{'id'})) {
6295: $keyroot.='_'.$token->[2]->{'id'};
6296: }
6297: if ($metaentry{':packages'}) {
6298: $metaentry{':packages'}.=','.$package.$keyroot;
6299: } else {
6300: $metaentry{':packages'}=$package.$keyroot;
6301: }
6302: foreach my $pack_entry (keys(%packagetab)) {
6303: my $part=$keyroot;
6304: $part=~s/^\_//;
6305: if ($pack_entry=~/^\Q$package\E\&/ ||
6306: $pack_entry=~/^\Q$package\E_0\&/) {
6307: my ($pack,$name,$subp)=split(/\&/,$pack_entry);
6308: # ignore package.tab specified default values
6309: # here &package_tab_default() will fetch those
6310: if ($subp eq 'default') { next; }
6311: my $value=$packagetab{$pack_entry};
6312: my $unikey;
6313: if ($pack =~ /_0$/) {
6314: $unikey='parameter_0_'.$name;
6315: $part=0;
6316: } else {
6317: $unikey='parameter'.$keyroot.'_'.$name;
6318: }
6319: if ($subp eq 'display') {
6320: $value.=' [Part: '.$part.']';
6321: }
6322: $metaentry{':'.$unikey.'.part'}=$part;
6323: $metathesekeys{$unikey}=1;
6324: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6325: $metaentry{':'.$unikey.'.'.$subp}=$value;
6326: }
6327: if (defined($metaentry{':'.$unikey.'.default'})) {
6328: $metaentry{':'.$unikey}=
6329: $metaentry{':'.$unikey.'.default'};
6330: }
6331: }
6332: }
6333: } else {
6334: #
6335: # This is not a package - some other kind of start tag
6336: #
6337: my $entry=$token->[1];
6338: my $unikey;
6339: if ($entry eq 'import') {
6340: $unikey='';
6341: } else {
6342: $unikey=$entry;
6343: }
6344: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6345:
6346: if (defined($token->[2]->{'id'})) {
6347: $unikey.='_'.$token->[2]->{'id'};
6348: }
6349:
6350: if ($entry eq 'import') {
6351: #
6352: # Importing a library here
6353: #
6354: if ($depthcount<20) {
6355: my $location=$parser->get_text('/import');
6356: my $dir=$filename;
6357: $dir=~s|[^/]*$||;
6358: $location=&filelocation($dir,$location);
6359: my $metadata =
6360: &metadata($uri,'keys', $location,$unikey,
6361: $depthcount+1);
6362: foreach my $meta (split(',',$metadata)) {
6363: $metaentry{':'.$meta}=$metaentry{':'.$meta};
6364: $metathesekeys{$meta}=1;
6365: }
6366: }
6367: } else {
6368:
6369: if (defined($token->[2]->{'name'})) {
6370: $unikey.='_'.$token->[2]->{'name'};
6371: }
6372: $metathesekeys{$unikey}=1;
6373: foreach my $param (@{$token->[3]}) {
6374: $metaentry{':'.$unikey.'.'.$param} =
6375: $token->[2]->{$param};
6376: }
6377: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
6378: my $default=$metaentry{':'.$unikey.'.default'};
6379: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
6380: # only ws inside the tag, and not in default, so use default
6381: # as value
6382: $metaentry{':'.$unikey}=$default;
6383: } else {
6384: # either something interesting inside the tag or default
6385: # uninteresting
6386: $metaentry{':'.$unikey}=$internaltext;
6387: }
6388: # end of not-a-package not-a-library import
6389: }
6390: # end of not-a-package start tag
6391: }
6392: # the next is the end of "start tag"
6393: }
6394: }
6395: my ($extension) = ($uri =~ /\.(\w+)$/);
6396: foreach my $key (keys(%packagetab)) {
6397: #no specific packages #how's our extension
6398: if ($key!~/^extension_\Q$extension\E&/) { next; }
6399: &metadata_create_package_def($uri,$key,'extension_'.$extension,
6400: \%metathesekeys);
6401: }
6402: if (!exists($metaentry{':packages'})) {
6403: foreach my $key (keys(%packagetab)) {
6404: #no specific packages well let's get default then
6405: if ($key!~/^default&/) { next; }
6406: &metadata_create_package_def($uri,$key,'default',
6407: \%metathesekeys);
6408: }
6409: }
6410: # are there custom rights to evaluate
6411: if ($metaentry{':copyright'} eq 'custom') {
6412:
6413: #
6414: # Importing a rights file here
6415: #
6416: unless ($depthcount) {
6417: my $location=$metaentry{':customdistributionfile'};
6418: my $dir=$filename;
6419: $dir=~s|[^/]*$||;
6420: $location=&filelocation($dir,$location);
6421: my $rights_metadata =
6422: &metadata($uri,'keys',$location,'_rights',
6423: $depthcount+1);
6424: foreach my $rights (split(',',$rights_metadata)) {
6425: #$metaentry{':'.$rights}=$metacache{$uri}->{':'.$rights};
6426: $metathesekeys{$rights}=1;
6427: }
6428: }
6429: }
6430: # uniqifiy package listing
6431: my %seen;
6432: my @uniq_packages =
6433: grep { ! $seen{$_} ++ } (split(',',$metaentry{':packages'}));
6434: $metaentry{':packages'} = join(',',@uniq_packages);
6435:
6436: $metaentry{':keys'} = join(',',keys(%metathesekeys));
6437: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
6438: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
6439: &do_cache_new('meta',$uri,\%metaentry,60*60);
6440: # this is the end of "was not already recently cached
6441: }
6442: return $metaentry{':'.$what};
6443: }
6444:
6445: sub metadata_create_package_def {
6446: my ($uri,$key,$package,$metathesekeys)=@_;
6447: my ($pack,$name,$subp)=split(/\&/,$key);
6448: if ($subp eq 'default') { next; }
6449:
6450: if (defined($metaentry{':packages'})) {
6451: $metaentry{':packages'}.=','.$package;
6452: } else {
6453: $metaentry{':packages'}=$package;
6454: }
6455: my $value=$packagetab{$key};
6456: my $unikey;
6457: $unikey='parameter_0_'.$name;
6458: $metaentry{':'.$unikey.'.part'}=0;
6459: $$metathesekeys{$unikey}=1;
6460: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6461: $metaentry{':'.$unikey.'.'.$subp}=$value;
6462: }
6463: if (defined($metaentry{':'.$unikey.'.default'})) {
6464: $metaentry{':'.$unikey}=
6465: $metaentry{':'.$unikey.'.default'};
6466: }
6467: }
6468:
6469: sub metadata_generate_part0 {
6470: my ($metadata,$metacache,$uri) = @_;
6471: my %allnames;
6472: foreach my $metakey (keys(%$metadata)) {
6473: if ($metakey=~/^parameter\_(.*)/) {
6474: my $part=$$metacache{':'.$metakey.'.part'};
6475: my $name=$$metacache{':'.$metakey.'.name'};
6476: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
6477: $allnames{$name}=$part;
6478: }
6479: }
6480: }
6481: foreach my $name (keys(%allnames)) {
6482: $$metadata{"parameter_0_$name"}=1;
6483: my $key=":parameter_0_$name";
6484: $$metacache{"$key.part"}='0';
6485: $$metacache{"$key.name"}=$name;
6486: $$metacache{"$key.type"}=$$metacache{':parameter_'.
6487: $allnames{$name}.'_'.$name.
6488: '.type'};
6489: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
6490: '.display'};
6491: my $expr='[Part: '.$allnames{$name}.']';
6492: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
6493: $$metacache{"$key.display"}=$olddis;
6494: }
6495: }
6496:
6497: # ------------------------------------------------------ Devalidate title cache
6498:
6499: sub devalidate_title_cache {
6500: my ($url)=@_;
6501: if (!$env{'request.course.id'}) { return; }
6502: my $symb=&symbread($url);
6503: if (!$symb) { return; }
6504: my $key=$env{'request.course.id'}."\0".$symb;
6505: &devalidate_cache_new('title',$key);
6506: }
6507:
6508: # ------------------------------------------------- Get the title of a resource
6509:
6510: sub gettitle {
6511: my $urlsymb=shift;
6512: my $symb=&symbread($urlsymb);
6513: if ($symb) {
6514: my $key=$env{'request.course.id'}."\0".$symb;
6515: my ($result,$cached)=&is_cached_new('title',$key);
6516: if (defined($cached)) {
6517: return $result;
6518: }
6519: my ($map,$resid,$url)=&decode_symb($symb);
6520: my $title='';
6521: my %bighash;
6522: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6523: &GDBM_READER(),0640)) {
6524: my $mapid=$bighash{'map_pc_'.&clutter($map)};
6525: $title=$bighash{'title_'.$mapid.'.'.$resid};
6526: untie %bighash;
6527: }
6528: $title=~s/\&colon\;/\:/gs;
6529: if ($title) {
6530: return &do_cache_new('title',$key,$title,600);
6531: }
6532: $urlsymb=$url;
6533: }
6534: my $title=&metadata($urlsymb,'title');
6535: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
6536: return $title;
6537: }
6538:
6539: sub get_slot {
6540: my ($which,$cnum,$cdom)=@_;
6541: if (!$cnum || !$cdom) {
6542: (undef,my $courseid)=&whichuser();
6543: $cdom=$env{'course.'.$courseid.'.domain'};
6544: $cnum=$env{'course.'.$courseid.'.num'};
6545: }
6546: my $key=join("\0",'slots',$cdom,$cnum,$which);
6547: my %slotinfo;
6548: if (exists($remembered{$key})) {
6549: $slotinfo{$which} = $remembered{$key};
6550: } else {
6551: %slotinfo=&get('slots',[$which],$cdom,$cnum);
6552: &Apache::lonhomework::showhash(%slotinfo);
6553: my ($tmp)=keys(%slotinfo);
6554: if ($tmp=~/^error:/) { return (); }
6555: $remembered{$key} = $slotinfo{$which};
6556: }
6557: if (ref($slotinfo{$which}) eq 'HASH') {
6558: return %{$slotinfo{$which}};
6559: }
6560: return $slotinfo{$which};
6561: }
6562: # ------------------------------------------------- Update symbolic store links
6563:
6564: sub symblist {
6565: my ($mapname,%newhash)=@_;
6566: $mapname=&deversion(&declutter($mapname));
6567: my %hash;
6568: if (($env{'request.course.fn'}) && (%newhash)) {
6569: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6570: &GDBM_WRCREAT(),0640)) {
6571: foreach my $url (keys %newhash) {
6572: next if ($url eq 'last_known'
6573: && $env{'form.no_update_last_known'});
6574: $hash{declutter($url)}=&encode_symb($mapname,
6575: $newhash{$url}->[1],
6576: $newhash{$url}->[0]);
6577: }
6578: if (untie(%hash)) {
6579: return 'ok';
6580: }
6581: }
6582: }
6583: return 'error';
6584: }
6585:
6586: # --------------------------------------------------------------- Verify a symb
6587:
6588: sub symbverify {
6589: my ($symb,$thisurl)=@_;
6590: my $thisfn=$thisurl;
6591: $thisfn=&declutter($thisfn);
6592: # direct jump to resource in page or to a sequence - will construct own symbs
6593: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
6594: # check URL part
6595: my ($map,$resid,$url)=&decode_symb($symb);
6596:
6597: unless ($url eq $thisfn) { return 0; }
6598:
6599: $symb=&symbclean($symb);
6600: $thisurl=&deversion($thisurl);
6601: $thisfn=&deversion($thisfn);
6602:
6603: my %bighash;
6604: my $okay=0;
6605:
6606: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6607: &GDBM_READER(),0640)) {
6608: my $ids=$bighash{'ids_'.&clutter($thisurl)};
6609: unless ($ids) {
6610: $ids=$bighash{'ids_/'.$thisurl};
6611: }
6612: if ($ids) {
6613: # ------------------------------------------------------------------- Has ID(s)
6614: foreach my $id (split(/\,/,$ids)) {
6615: my ($mapid,$resid)=split(/\./,$id);
6616: if (
6617: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
6618: eq $symb) {
6619: if (($env{'request.role.adv'}) ||
6620: $bighash{'encrypted_'.$id} eq $env{'request.enc'}) {
6621: $okay=1;
6622: }
6623: }
6624: }
6625: }
6626: untie(%bighash);
6627: }
6628: return $okay;
6629: }
6630:
6631: # --------------------------------------------------------------- Clean-up symb
6632:
6633: sub symbclean {
6634: my $symb=shift;
6635: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6636: # remove version from map
6637: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
6638:
6639: # remove version from URL
6640: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
6641:
6642: # remove wrapper
6643:
6644: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
6645: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
6646: return $symb;
6647: }
6648:
6649: # ---------------------------------------------- Split symb to find map and url
6650:
6651: sub encode_symb {
6652: my ($map,$resid,$url)=@_;
6653: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
6654: }
6655:
6656: sub decode_symb {
6657: my $symb=shift;
6658: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6659: my ($map,$resid,$url)=split(/___/,$symb);
6660: return (&fixversion($map),$resid,&fixversion($url));
6661: }
6662:
6663: sub fixversion {
6664: my $fn=shift;
6665: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
6666: my %bighash;
6667: my $uri=&clutter($fn);
6668: my $key=$env{'request.course.id'}.'_'.$uri;
6669: # is this cached?
6670: my ($result,$cached)=&is_cached_new('courseresversion',$key);
6671: if (defined($cached)) { return $result; }
6672: # unfortunately not cached, or expired
6673: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6674: &GDBM_READER(),0640)) {
6675: if ($bighash{'version_'.$uri}) {
6676: my $version=$bighash{'version_'.$uri};
6677: unless (($version eq 'mostrecent') ||
6678: ($version==&getversion($uri))) {
6679: $uri=~s/\.(\w+)$/\.$version\.$1/;
6680: }
6681: }
6682: untie %bighash;
6683: }
6684: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
6685: }
6686:
6687: sub deversion {
6688: my $url=shift;
6689: $url=~s/\.\d+\.(\w+)$/\.$1/;
6690: return $url;
6691: }
6692:
6693: # ------------------------------------------------------ Return symb list entry
6694:
6695: sub symbread {
6696: my ($thisfn,$donotrecurse)=@_;
6697: my $cache_str='request.symbread.cached.'.$thisfn;
6698: if (defined($env{$cache_str})) { return $env{$cache_str}; }
6699: # no filename provided? try from environment
6700: unless ($thisfn) {
6701: if ($env{'request.symb'}) {
6702: return $env{$cache_str}=&symbclean($env{'request.symb'});
6703: }
6704: $thisfn=$env{'request.filename'};
6705: }
6706: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
6707: # is that filename actually a symb? Verify, clean, and return
6708: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
6709: if (&symbverify($thisfn,$1)) {
6710: return $env{$cache_str}=&symbclean($thisfn);
6711: }
6712: }
6713: $thisfn=declutter($thisfn);
6714: my %hash;
6715: my %bighash;
6716: my $syval='';
6717: if (($env{'request.course.fn'}) && ($thisfn)) {
6718: my $targetfn = $thisfn;
6719: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
6720: $targetfn = 'adm/wrapper/'.$thisfn;
6721: }
6722: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
6723: $targetfn=$1;
6724: }
6725: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6726: &GDBM_READER(),0640)) {
6727: $syval=$hash{$targetfn};
6728: untie(%hash);
6729: }
6730: # ---------------------------------------------------------- There was an entry
6731: if ($syval) {
6732: #unless ($syval=~/\_\d+$/) {
6733: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
6734: #&appenv('request.ambiguous' => $thisfn);
6735: #return $env{$cache_str}='';
6736: #}
6737: #$syval.=$1;
6738: #}
6739: } else {
6740: # ------------------------------------------------------- Was not in symb table
6741: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6742: &GDBM_READER(),0640)) {
6743: # ---------------------------------------------- Get ID(s) for current resource
6744: my $ids=$bighash{'ids_'.&clutter($thisfn)};
6745: unless ($ids) {
6746: $ids=$bighash{'ids_/'.$thisfn};
6747: }
6748: unless ($ids) {
6749: # alias?
6750: $ids=$bighash{'mapalias_'.$thisfn};
6751: }
6752: if ($ids) {
6753: # ------------------------------------------------------------------- Has ID(s)
6754: my @possibilities=split(/\,/,$ids);
6755: if ($#possibilities==0) {
6756: # ----------------------------------------------- There is only one possibility
6757: my ($mapid,$resid)=split(/\./,$ids);
6758: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6759: $resid,$thisfn);
6760: } elsif (!$donotrecurse) {
6761: # ------------------------------------------ There is more than one possibility
6762: my $realpossible=0;
6763: foreach my $id (@possibilities) {
6764: my $file=$bighash{'src_'.$id};
6765: if (&allowed('bre',$file)) {
6766: my ($mapid,$resid)=split(/\./,$id);
6767: if ($bighash{'map_type_'.$mapid} ne 'page') {
6768: $realpossible++;
6769: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6770: $resid,$thisfn);
6771: }
6772: }
6773: }
6774: if ($realpossible!=1) { $syval=''; }
6775: } else {
6776: $syval='';
6777: }
6778: }
6779: untie(%bighash)
6780: }
6781: }
6782: if ($syval) {
6783: return $env{$cache_str}=$syval;
6784: }
6785: }
6786: &appenv('request.ambiguous' => $thisfn);
6787: return $env{$cache_str}='';
6788: }
6789:
6790: # ---------------------------------------------------------- Return random seed
6791:
6792: sub numval {
6793: my $txt=shift;
6794: $txt=~tr/A-J/0-9/;
6795: $txt=~tr/a-j/0-9/;
6796: $txt=~tr/K-T/0-9/;
6797: $txt=~tr/k-t/0-9/;
6798: $txt=~tr/U-Z/0-5/;
6799: $txt=~tr/u-z/0-5/;
6800: $txt=~s/\D//g;
6801: if ($_64bit) { if ($txt > 2**32) { return -1; } }
6802: return int($txt);
6803: }
6804:
6805: sub numval2 {
6806: my $txt=shift;
6807: $txt=~tr/A-J/0-9/;
6808: $txt=~tr/a-j/0-9/;
6809: $txt=~tr/K-T/0-9/;
6810: $txt=~tr/k-t/0-9/;
6811: $txt=~tr/U-Z/0-5/;
6812: $txt=~tr/u-z/0-5/;
6813: $txt=~s/\D//g;
6814: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6815: my $total;
6816: foreach my $val (@txts) { $total+=$val; }
6817: if ($_64bit) { if ($total > 2**32) { return -1; } }
6818: return int($total);
6819: }
6820:
6821: sub numval3 {
6822: use integer;
6823: my $txt=shift;
6824: $txt=~tr/A-J/0-9/;
6825: $txt=~tr/a-j/0-9/;
6826: $txt=~tr/K-T/0-9/;
6827: $txt=~tr/k-t/0-9/;
6828: $txt=~tr/U-Z/0-5/;
6829: $txt=~tr/u-z/0-5/;
6830: $txt=~s/\D//g;
6831: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6832: my $total;
6833: foreach my $val (@txts) { $total+=$val; }
6834: if ($_64bit) { $total=(($total<<32)>>32); }
6835: return $total;
6836: }
6837:
6838: sub digest {
6839: my ($data)=@_;
6840: my $digest=&Digest::MD5::md5($data);
6841: my ($a,$b,$c,$d)=unpack("iiii",$digest);
6842: my ($e,$f);
6843: {
6844: use integer;
6845: $e=($a+$b);
6846: $f=($c+$d);
6847: if ($_64bit) {
6848: $e=(($e<<32)>>32);
6849: $f=(($f<<32)>>32);
6850: }
6851: }
6852: if (wantarray) {
6853: return ($e,$f);
6854: } else {
6855: my $g;
6856: {
6857: use integer;
6858: $g=($e+$f);
6859: if ($_64bit) {
6860: $g=(($g<<32)>>32);
6861: }
6862: }
6863: return $g;
6864: }
6865: }
6866:
6867: sub latest_rnd_algorithm_id {
6868: return '64bit5';
6869: }
6870:
6871: sub get_rand_alg {
6872: my ($courseid)=@_;
6873: if (!$courseid) { $courseid=(&whichuser())[1]; }
6874: if ($courseid) {
6875: return $env{"course.$courseid.rndseed"};
6876: }
6877: return &latest_rnd_algorithm_id();
6878: }
6879:
6880: sub validCODE {
6881: my ($CODE)=@_;
6882: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
6883: return 0;
6884: }
6885:
6886: sub getCODE {
6887: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
6888: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
6889: defined($Apache::lonhomework::parsing_a_task) ) &&
6890: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
6891: return $Apache::lonhomework::history{'resource.CODE'};
6892: }
6893: return undef;
6894: }
6895:
6896: sub rndseed {
6897: my ($symb,$courseid,$domain,$username)=@_;
6898:
6899: my ($wsymb,$wcourseid,$wdomain,$wusername)=&whichuser();
6900: if (!$symb) {
6901: unless ($symb=$wsymb) { return time; }
6902: }
6903: if (!$courseid) { $courseid=$wcourseid; }
6904: if (!$domain) { $domain=$wdomain; }
6905: if (!$username) { $username=$wusername }
6906: my $which=&get_rand_alg();
6907:
6908: if (defined(&getCODE())) {
6909: if ($which eq '64bit5') {
6910: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
6911: } elsif ($which eq '64bit4') {
6912: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
6913: } else {
6914: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
6915: }
6916: } elsif ($which eq '64bit5') {
6917: return &rndseed_64bit5($symb,$courseid,$domain,$username);
6918: } elsif ($which eq '64bit4') {
6919: return &rndseed_64bit4($symb,$courseid,$domain,$username);
6920: } elsif ($which eq '64bit3') {
6921: return &rndseed_64bit3($symb,$courseid,$domain,$username);
6922: } elsif ($which eq '64bit2') {
6923: return &rndseed_64bit2($symb,$courseid,$domain,$username);
6924: } elsif ($which eq '64bit') {
6925: return &rndseed_64bit($symb,$courseid,$domain,$username);
6926: }
6927: return &rndseed_32bit($symb,$courseid,$domain,$username);
6928: }
6929:
6930: sub rndseed_32bit {
6931: my ($symb,$courseid,$domain,$username)=@_;
6932: {
6933: use integer;
6934: my $symbchck=unpack("%32C*",$symb) << 27;
6935: my $symbseed=numval($symb) << 22;
6936: my $namechck=unpack("%32C*",$username) << 17;
6937: my $nameseed=numval($username) << 12;
6938: my $domainseed=unpack("%32C*",$domain) << 7;
6939: my $courseseed=unpack("%32C*",$courseid);
6940: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
6941: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6942: #&logthis("rndseed :$num:$symb");
6943: if ($_64bit) { $num=(($num<<32)>>32); }
6944: return $num;
6945: }
6946: }
6947:
6948: sub rndseed_64bit {
6949: my ($symb,$courseid,$domain,$username)=@_;
6950: {
6951: use integer;
6952: my $symbchck=unpack("%32S*",$symb) << 21;
6953: my $symbseed=numval($symb) << 10;
6954: my $namechck=unpack("%32S*",$username);
6955:
6956: my $nameseed=numval($username) << 21;
6957: my $domainseed=unpack("%32S*",$domain) << 10;
6958: my $courseseed=unpack("%32S*",$courseid);
6959:
6960: my $num1=$symbchck+$symbseed+$namechck;
6961: my $num2=$nameseed+$domainseed+$courseseed;
6962: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6963: #&logthis("rndseed :$num:$symb");
6964: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6965: return "$num1,$num2";
6966: }
6967: }
6968:
6969: sub rndseed_64bit2 {
6970: my ($symb,$courseid,$domain,$username)=@_;
6971: {
6972: use integer;
6973: # strings need to be an even # of cahracters long, it it is odd the
6974: # last characters gets thrown away
6975: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6976: my $symbseed=numval($symb) << 10;
6977: my $namechck=unpack("%32S*",$username.' ');
6978:
6979: my $nameseed=numval($username) << 21;
6980: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6981: my $courseseed=unpack("%32S*",$courseid.' ');
6982:
6983: my $num1=$symbchck+$symbseed+$namechck;
6984: my $num2=$nameseed+$domainseed+$courseseed;
6985: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6986: #&logthis("rndseed :$num:$symb");
6987: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6988: return "$num1,$num2";
6989: }
6990: }
6991:
6992: sub rndseed_64bit3 {
6993: my ($symb,$courseid,$domain,$username)=@_;
6994: {
6995: use integer;
6996: # strings need to be an even # of cahracters long, it it is odd the
6997: # last characters gets thrown away
6998: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6999: my $symbseed=numval2($symb) << 10;
7000: my $namechck=unpack("%32S*",$username.' ');
7001:
7002: my $nameseed=numval2($username) << 21;
7003: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7004: my $courseseed=unpack("%32S*",$courseid.' ');
7005:
7006: my $num1=$symbchck+$symbseed+$namechck;
7007: my $num2=$nameseed+$domainseed+$courseseed;
7008: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7009: #&logthis("rndseed :$num1:$num2:$_64bit");
7010: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7011:
7012: return "$num1:$num2";
7013: }
7014: }
7015:
7016: sub rndseed_64bit4 {
7017: my ($symb,$courseid,$domain,$username)=@_;
7018: {
7019: use integer;
7020: # strings need to be an even # of cahracters long, it it is odd the
7021: # last characters gets thrown away
7022: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7023: my $symbseed=numval3($symb) << 10;
7024: my $namechck=unpack("%32S*",$username.' ');
7025:
7026: my $nameseed=numval3($username) << 21;
7027: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7028: my $courseseed=unpack("%32S*",$courseid.' ');
7029:
7030: my $num1=$symbchck+$symbseed+$namechck;
7031: my $num2=$nameseed+$domainseed+$courseseed;
7032: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7033: #&logthis("rndseed :$num1:$num2:$_64bit");
7034: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7035:
7036: return "$num1:$num2";
7037: }
7038: }
7039:
7040: sub rndseed_64bit5 {
7041: my ($symb,$courseid,$domain,$username)=@_;
7042: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
7043: return "$num1:$num2";
7044: }
7045:
7046: sub rndseed_CODE_64bit {
7047: my ($symb,$courseid,$domain,$username)=@_;
7048: {
7049: use integer;
7050: my $symbchck=unpack("%32S*",$symb.' ') << 16;
7051: my $symbseed=numval2($symb);
7052: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
7053: my $CODEseed=numval(&getCODE());
7054: my $courseseed=unpack("%32S*",$courseid.' ');
7055: my $num1=$symbseed+$CODEchck;
7056: my $num2=$CODEseed+$courseseed+$symbchck;
7057: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
7058: #&logthis("rndseed :$num1:$num2:$symb");
7059: if ($_64bit) { $num1=(($num1<<32)>>32); }
7060: if ($_64bit) { $num2=(($num2<<32)>>32); }
7061: return "$num1:$num2";
7062: }
7063: }
7064:
7065: sub rndseed_CODE_64bit4 {
7066: my ($symb,$courseid,$domain,$username)=@_;
7067: {
7068: use integer;
7069: my $symbchck=unpack("%32S*",$symb.' ') << 16;
7070: my $symbseed=numval3($symb);
7071: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
7072: my $CODEseed=numval3(&getCODE());
7073: my $courseseed=unpack("%32S*",$courseid.' ');
7074: my $num1=$symbseed+$CODEchck;
7075: my $num2=$CODEseed+$courseseed+$symbchck;
7076: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
7077: #&logthis("rndseed :$num1:$num2:$symb");
7078: if ($_64bit) { $num1=(($num1<<32)>>32); }
7079: if ($_64bit) { $num2=(($num2<<32)>>32); }
7080: return "$num1:$num2";
7081: }
7082: }
7083:
7084: sub rndseed_CODE_64bit5 {
7085: my ($symb,$courseid,$domain,$username)=@_;
7086: my $code = &getCODE();
7087: my ($num1,$num2)=&digest("$symb,$courseid,$code");
7088: return "$num1:$num2";
7089: }
7090:
7091: sub setup_random_from_rndseed {
7092: my ($rndseed)=@_;
7093: if ($rndseed =~/([,:])/) {
7094: my ($num1,$num2)=split(/[,:]/,$rndseed);
7095: &Math::Random::random_set_seed(abs($num1),abs($num2));
7096: } else {
7097: &Math::Random::random_set_seed_from_phrase($rndseed);
7098: }
7099: }
7100:
7101: sub latest_receipt_algorithm_id {
7102: return 'receipt3';
7103: }
7104:
7105: sub recunique {
7106: my $fucourseid=shift;
7107: my $unique;
7108: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
7109: $env{"course.$fucourseid.receiptalg"} eq 'receipt3' ) {
7110: $unique=$env{"course.$fucourseid.internal.encseed"};
7111: } else {
7112: $unique=$perlvar{'lonReceipt'};
7113: }
7114: return unpack("%32C*",$unique);
7115: }
7116:
7117: sub recprefix {
7118: my $fucourseid=shift;
7119: my $prefix;
7120: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2'||
7121: $env{"course.$fucourseid.receiptalg"} eq 'receipt3' ) {
7122: $prefix=$env{"course.$fucourseid.internal.encpref"};
7123: } else {
7124: $prefix=$perlvar{'lonHostID'};
7125: }
7126: return unpack("%32C*",$prefix);
7127: }
7128:
7129: sub ireceipt {
7130: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
7131:
7132: my $return =&recprefix($fucourseid).'-';
7133:
7134: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt3' ||
7135: $env{'request.state'} eq 'construct') {
7136: $return .= (&digest("$funame,$fudom,$fucourseid,$fusymb,$part")%10000);
7137: return $return;
7138: }
7139:
7140: my $cuname=unpack("%32C*",$funame);
7141: my $cudom=unpack("%32C*",$fudom);
7142: my $cucourseid=unpack("%32C*",$fucourseid);
7143: my $cusymb=unpack("%32C*",$fusymb);
7144: my $cunique=&recunique($fucourseid);
7145: my $cpart=unpack("%32S*",$part);
7146: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
7147:
7148: #&logthis("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname)." and ".($cpart%$cudom));
7149:
7150: $return.= ($cunique%$cuname+
7151: $cunique%$cudom+
7152: $cusymb%$cuname+
7153: $cusymb%$cudom+
7154: $cucourseid%$cuname+
7155: $cucourseid%$cudom+
7156: $cpart%$cuname+
7157: $cpart%$cudom);
7158: } else {
7159: $return.= ($cunique%$cuname+
7160: $cunique%$cudom+
7161: $cusymb%$cuname+
7162: $cusymb%$cudom+
7163: $cucourseid%$cuname+
7164: $cucourseid%$cudom);
7165: }
7166: return $return;
7167: }
7168:
7169: sub receipt {
7170: my ($part)=@_;
7171: my ($symb,$courseid,$domain,$name) = &whichuser();
7172: return &ireceipt($name,$domain,$courseid,$symb,$part);
7173: }
7174:
7175: sub whichuser {
7176: my ($passedsymb)=@_;
7177: my ($symb,$courseid,$domain,$name,$publicuser);
7178: if (defined($env{'form.grade_symb'})) {
7179: my ($tmp_courseid)=&get_env_multiple('form.grade_courseid');
7180: my $allowed=&allowed('vgr',$tmp_courseid);
7181: if (!$allowed &&
7182: exists($env{'request.course.sec'}) &&
7183: $env{'request.course.sec'} !~ /^\s*$/) {
7184: $allowed=&allowed('vgr',$tmp_courseid.
7185: '/'.$env{'request.course.sec'});
7186: }
7187: if ($allowed) {
7188: ($symb)=&get_env_multiple('form.grade_symb');
7189: $courseid=$tmp_courseid;
7190: ($domain)=&get_env_multiple('form.grade_domain');
7191: ($name)=&get_env_multiple('form.grade_username');
7192: return ($symb,$courseid,$domain,$name,$publicuser);
7193: }
7194: }
7195: if (!$passedsymb) {
7196: $symb=&symbread();
7197: } else {
7198: $symb=$passedsymb;
7199: }
7200: $courseid=$env{'request.course.id'};
7201: $domain=$env{'user.domain'};
7202: $name=$env{'user.name'};
7203: if ($name eq 'public' && $domain eq 'public') {
7204: if (!defined($env{'form.username'})) {
7205: $env{'form.username'}.=time.rand(10000000);
7206: }
7207: $name.=$env{'form.username'};
7208: }
7209: return ($symb,$courseid,$domain,$name,$publicuser);
7210:
7211: }
7212:
7213: # ------------------------------------------------------------ Serves up a file
7214: # returns either the contents of the file or
7215: # -1 if the file doesn't exist
7216: #
7217: # if the target is a file that was uploaded via DOCS,
7218: # a check will be made to see if a current copy exists on the local server,
7219: # if it does this will be served, otherwise a copy will be retrieved from
7220: # the home server for the course and stored in /home/httpd/html/userfiles on
7221: # the local server.
7222:
7223: sub getfile {
7224: my ($file) = @_;
7225: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
7226: &repcopy($file);
7227: return &readfile($file);
7228: }
7229:
7230: sub repcopy_userfile {
7231: my ($file)=@_;
7232: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
7233: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
7234: my ($cdom,$cnum,$filename) =
7235: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+($match_domain)/+($match_name)/+(.*)|);
7236: my $uri="/uploaded/$cdom/$cnum/$filename";
7237: if (-e "$file") {
7238: # we already have a local copy, check it out
7239: my @fileinfo = stat($file);
7240: my $rtncode;
7241: my $info;
7242: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
7243: if ($lwpresp ne 'ok') {
7244: # there is no such file anymore, even though we had a local copy
7245: if ($rtncode eq '404') {
7246: unlink($file);
7247: }
7248: return -1;
7249: }
7250: if ($info < $fileinfo[9]) {
7251: # nice, the file we have is up-to-date, just say okay
7252: return 'ok';
7253: } else {
7254: # the file is outdated, get rid of it
7255: unlink($file);
7256: }
7257: }
7258: # one way or the other, at this point, we don't have the file
7259: # construct the correct path for the file
7260: my @parts = ($cdom,$cnum);
7261: if ($filename =~ m|^(.+)/[^/]+$|) {
7262: push @parts, split(/\//,$1);
7263: }
7264: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
7265: foreach my $part (@parts) {
7266: $path .= '/'.$part;
7267: if (!-e $path) {
7268: mkdir($path,0770);
7269: }
7270: }
7271: # now the path exists for sure
7272: # get a user agent
7273: my $ua=new LWP::UserAgent;
7274: my $transferfile=$file.'.in.transfer';
7275: # FIXME: this should flock
7276: if (-e $transferfile) { return 'ok'; }
7277: my $request;
7278: $uri=~s/^\///;
7279: $request=new HTTP::Request('GET','http://'.&hostname(&homeserver($cnum,$cdom)).'/raw/'.$uri);
7280: my $response=$ua->request($request,$transferfile);
7281: # did it work?
7282: if ($response->is_error()) {
7283: unlink($transferfile);
7284: &logthis("Userfile repcopy failed for $uri");
7285: return -1;
7286: }
7287: # worked, rename the transfer file
7288: rename($transferfile,$file);
7289: return 'ok';
7290: }
7291:
7292: sub tokenwrapper {
7293: my $uri=shift;
7294: $uri=~s|^http\://([^/]+)||;
7295: $uri=~s|^/||;
7296: $env{'user.environment'}=~/\/([^\/]+)\.id/;
7297: my $token=$1;
7298: my (undef,$udom,$uname,$file)=split('/',$uri,4);
7299: if ($udom && $uname && $file) {
7300: $file=~s|(\?\.*)*$||;
7301: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
7302: return 'http://'.&hostname(&homeserver($uname,$udom)).'/'.$uri.
7303: (($uri=~/\?/)?'&':'?').'token='.$token.
7304: '&tokenissued='.$perlvar{'lonHostID'};
7305: } else {
7306: return '/adm/notfound.html';
7307: }
7308: }
7309:
7310: # call with reqtype HEAD: get last modification time
7311: # call with reqtype GET: get the file contents
7312: # Do not call this with reqtype GET for large files! It loads everything into memory
7313: #
7314: sub getuploaded {
7315: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
7316: $uri=~s/^\///;
7317: $uri = 'http://'.&hostname(&homeserver($cnum,$cdom)).'/raw/'.$uri;
7318: my $ua=new LWP::UserAgent;
7319: my $request=new HTTP::Request($reqtype,$uri);
7320: my $response=$ua->request($request);
7321: $$rtncode = $response->code;
7322: if (! $response->is_success()) {
7323: return 'failed';
7324: }
7325: if ($reqtype eq 'HEAD') {
7326: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
7327: } elsif ($reqtype eq 'GET') {
7328: $$info = $response->content;
7329: }
7330: return 'ok';
7331: }
7332:
7333: sub readfile {
7334: my $file = shift;
7335: if ( (! -e $file ) || ($file eq '') ) { return -1; };
7336: my $fh;
7337: open($fh,"<$file");
7338: my $a='';
7339: while (my $line = <$fh>) { $a .= $line; }
7340: return $a;
7341: }
7342:
7343: sub filelocation {
7344: my ($dir,$file) = @_;
7345: my $location;
7346: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
7347:
7348: if ($file =~ m-^/adm/-) {
7349: $file=~s-^/adm/wrapper/-/-;
7350: $file=~s-^/adm/coursedocs/showdoc/-/-;
7351: }
7352: if ($file=~m:^/~:) { # is a contruction space reference
7353: $location = $file;
7354: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
7355: } elsif ($file=~m{^/home/$match_username/public_html/}) {
7356: # is a correct contruction space reference
7357: $location = $file;
7358: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
7359: my ($udom,$uname,$filename)=
7360: ($file=~m -^/+(?:uploaded|editupload)/+($match_domain)/+($match_name)/+(.*)$-);
7361: my $home=&homeserver($uname,$udom);
7362: my $is_me=0;
7363: my @ids=¤t_machine_ids();
7364: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
7365: if ($is_me) {
7366: $location=&propath($udom,$uname).
7367: '/userfiles/'.$filename;
7368: } else {
7369: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
7370: $udom.'/'.$uname.'/'.$filename;
7371: }
7372: } else {
7373: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7374: $file=~s:^/res/:/:;
7375: if ( !( $file =~ m:^/:) ) {
7376: $location = $dir. '/'.$file;
7377: } else {
7378: $location = '/home/httpd/html/res'.$file;
7379: }
7380: }
7381: $location=~s://+:/:g; # remove duplicate /
7382: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
7383: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
7384: return $location;
7385: }
7386:
7387: sub hreflocation {
7388: my ($dir,$file)=@_;
7389: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
7390: $file=filelocation($dir,$file);
7391: } elsif ($file=~m-^/adm/-) {
7392: $file=~s-^/adm/wrapper/-/-;
7393: $file=~s-^/adm/coursedocs/showdoc/-/-;
7394: }
7395: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
7396: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
7397: } elsif ($file=~m-/home/($match_username)/public_html/-) {
7398: $file=~s-^/home/($match_username)/public_html/-/~$1/-;
7399: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
7400: $file=~s-^/home/httpd/lonUsers/($match_domain)/./././($match_name)/userfiles/
7401: -/uploaded/$1/$2/-x;
7402: }
7403: return $file;
7404: }
7405:
7406: sub current_machine_domains {
7407: my $hostname=&hostname($perlvar{'lonHostID'});
7408: my @domains;
7409: my %hostname = &all_hostnames();
7410: while( my($id, $name) = each(%hostname)) {
7411: # &logthis("-$id-$name-$hostname-");
7412: if ($hostname eq $name) {
7413: push(@domains,&host_domain($id));
7414: }
7415: }
7416: return @domains;
7417: }
7418:
7419: sub current_machine_ids {
7420: my $hostname=&hostname($perlvar{'lonHostID'});
7421: my @ids;
7422: my %hostname = &all_hostnames();
7423: while( my($id, $name) = each(%hostname)) {
7424: # &logthis("-$id-$name-$hostname-");
7425: if ($hostname eq $name) {
7426: push(@ids,$id);
7427: }
7428: }
7429: return @ids;
7430: }
7431:
7432: sub additional_machine_domains {
7433: my @domains;
7434: open(my $fh,"<$perlvar{'lonTabDir'}/expected_domains.tab");
7435: while( my $line = <$fh>) {
7436: $line =~ s/\s//g;
7437: push(@domains,$line);
7438: }
7439: return @domains;
7440: }
7441:
7442: sub default_login_domain {
7443: my $domain = $perlvar{'lonDefDomain'};
7444: my $testdomain=(split(/\./,$ENV{'HTTP_HOST'}))[0];
7445: foreach my $posdom (¤t_machine_domains(),
7446: &additional_machine_domains()) {
7447: if (lc($posdom) eq lc($testdomain)) {
7448: $domain=$posdom;
7449: last;
7450: }
7451: }
7452: return $domain;
7453: }
7454:
7455: # ------------------------------------------------------------- Declutters URLs
7456:
7457: sub declutter {
7458: my $thisfn=shift;
7459: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
7460: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7461: $thisfn=~s/^\///;
7462: $thisfn=~s|^adm/wrapper/||;
7463: $thisfn=~s|^adm/coursedocs/showdoc/||;
7464: $thisfn=~s/^res\///;
7465: $thisfn=~s/\?.+$//;
7466: return $thisfn;
7467: }
7468:
7469: # ------------------------------------------------------------- Clutter up URLs
7470:
7471: sub clutter {
7472: my $thisfn='/'.&declutter(shift);
7473: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
7474: $thisfn='/res'.$thisfn;
7475: }
7476: if ($thisfn !~m|/adm|) {
7477: if ($thisfn =~ m|/ext/|) {
7478: $thisfn='/adm/wrapper'.$thisfn;
7479: } else {
7480: my ($ext) = ($thisfn =~ /\.(\w+)$/);
7481: my $embstyle=&Apache::loncommon::fileembstyle($ext);
7482: if ($embstyle eq 'ssi'
7483: || ($embstyle eq 'hdn')
7484: || ($embstyle eq 'rat')
7485: || ($embstyle eq 'prv')
7486: || ($embstyle eq 'ign')) {
7487: #do nothing with these
7488: } elsif (($embstyle eq 'img')
7489: || ($embstyle eq 'emb')
7490: || ($embstyle eq 'wrp')) {
7491: $thisfn='/adm/wrapper'.$thisfn;
7492: } elsif ($embstyle eq 'unk'
7493: && $thisfn!~/\.(sequence|page)$/) {
7494: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
7495: } else {
7496: # &logthis("Got a blank emb style");
7497: }
7498: }
7499: }
7500: return $thisfn;
7501: }
7502:
7503: sub clutter_with_no_wrapper {
7504: my $uri = &clutter(shift);
7505: if ($uri =~ m-^/adm/-) {
7506: $uri =~ s-^/adm/wrapper/-/-;
7507: $uri =~ s-^/adm/coursedocs/showdoc/-/-;
7508: }
7509: return $uri;
7510: }
7511:
7512: sub freeze_escape {
7513: my ($value)=@_;
7514: if (ref($value)) {
7515: $value=&nfreeze($value);
7516: return '__FROZEN__'.&escape($value);
7517: }
7518: return &escape($value);
7519: }
7520:
7521:
7522: sub thaw_unescape {
7523: my ($value)=@_;
7524: if ($value =~ /^__FROZEN__/) {
7525: substr($value,0,10,undef);
7526: $value=&unescape($value);
7527: return &thaw($value);
7528: }
7529: return &unescape($value);
7530: }
7531:
7532: sub correct_line_ends {
7533: my ($result)=@_;
7534: $$result =~s/\r\n/\n/mg;
7535: $$result =~s/\r/\n/mg;
7536: }
7537: # ================================================================ Main Program
7538:
7539: sub goodbye {
7540: &logthis("Starting Shut down");
7541: #not converted to using infrastruture and probably shouldn't be
7542: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
7543: #converted
7544: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
7545: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
7546: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
7547: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
7548: #1.1 only
7549: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
7550: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
7551: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
7552: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
7553: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
7554: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
7555: &logthis(sprintf("%-20s is %s",'hits',$hits));
7556: &flushcourselogs();
7557: &logthis("Shutting down");
7558: }
7559:
7560: BEGIN {
7561: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
7562: unless ($readit) {
7563: {
7564: my $configvars = LONCAPA::Configuration::read_conf('loncapa.conf');
7565: %perlvar = (%perlvar,%{$configvars});
7566: }
7567:
7568: # ------------------------------------------------------------ Read domain file
7569: {
7570: %domaindescription = ();
7571: %domain_auth_def = ();
7572: %domain_auth_arg_def = ();
7573: my $fh;
7574: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
7575: while (my $line = <$fh>) {
7576: next if ($line =~ /^(\#|\s*$)/);
7577: # next if /^\#/;
7578: chomp $line;
7579: my ($domain, $domain_description, $def_auth, $def_auth_arg,
7580: $def_lang, $city, $longi, $lati, $primary) = split(/:/,$line,9);
7581: $domain_auth_def{$domain}=$def_auth;
7582: $domain_auth_arg_def{$domain}=$def_auth_arg;
7583: $domaindescription{$domain}=$domain_description;
7584: $domain_lang_def{$domain}=$def_lang;
7585: $domain_city{$domain}=$city;
7586: $domain_longi{$domain}=$longi;
7587: $domain_lati{$domain}=$lati;
7588: $domain_primary{$domain}=$primary;
7589:
7590: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
7591: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
7592: }
7593: }
7594: close ($fh);
7595: }
7596:
7597:
7598: # ------------------------------------------------------------- Read hosts file
7599: {
7600: my %hostname;
7601: my %hostdom;
7602: my %libserv;
7603: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
7604:
7605: while (my $configline=<$config>) {
7606: next if ($configline =~ /^(\#|\s*$)/);
7607: chomp($configline);
7608: my ($id,$domain,$role,$name)=split(/:/,$configline);
7609: $name=~s/\s//g;
7610: if ($id && $domain && $role && $name) {
7611: $hostname{$id}=$name;
7612: $hostdom{$id}=$domain;
7613: if ($role eq 'library') { $libserv{$id}=$name; }
7614: }
7615: }
7616: close($config);
7617: # FIXME: dev server don't want this, production servers _do_ want this
7618: #&get_iphost();
7619:
7620: sub hostname {
7621: my ($lonid) = @_;
7622: return $hostname{$lonid};
7623: }
7624:
7625: sub all_hostnames {
7626: return %hostname;
7627: }
7628:
7629: sub is_library {
7630: return exists($libserv{$_[0]});
7631: }
7632:
7633: sub all_library {
7634: return %libserv;
7635: }
7636:
7637: sub get_servers {
7638: my ($domain,$type) = @_;
7639: my %possible_hosts = ($type eq 'library') ? %libserv
7640: : %hostname;
7641: my %result;
7642: if (ref($domain) eq 'ARRAY') {
7643: while ( my ($host,$hostname) = each(%possible_hosts)) {
7644: if (grep(/^\Q$hostdom{$host}\E$/,@$domain)) {
7645: $result{$host} = $hostname;
7646: }
7647: }
7648: } else {
7649: while ( my ($host,$hostname) = each(%possible_hosts)) {
7650: if ($hostdom{$host} eq $domain) {
7651: $result{$host} = $hostname;
7652: }
7653: }
7654: }
7655: return %result;
7656: }
7657:
7658: sub host_domain {
7659: my ($lonid) = @_;
7660: return $hostdom{$lonid};
7661: }
7662:
7663: sub all_domains {
7664: my %seen;
7665: my @uniq = grep(!$seen{$_}++, values(%hostdom));
7666: return @uniq;
7667: }
7668: }
7669:
7670: sub get_hosts_from_ip {
7671: my ($ip) = @_;
7672: my %iphosts = &get_iphost();
7673: if (ref($iphosts{$ip})) {
7674: return @{$iphosts{$ip}};
7675: }
7676: return;
7677: }
7678:
7679: sub get_iphost {
7680: if (%iphost) { return %iphost; }
7681: my %name_to_ip;
7682: my %hostname = &all_hostnames();
7683: foreach my $id (keys(%hostname)) {
7684: my $name=$hostname{$id};
7685: my $ip;
7686: if (!exists($name_to_ip{$name})) {
7687: $ip = gethostbyname($name);
7688: if (!$ip || length($ip) ne 4) {
7689: &logthis("Skipping host $id name $name no IP found");
7690: next;
7691: }
7692: $ip=inet_ntoa($ip);
7693: $name_to_ip{$name} = $ip;
7694: } else {
7695: $ip = $name_to_ip{$name};
7696: }
7697: push(@{$iphost{$ip}},$id);
7698: }
7699: return %iphost;
7700: }
7701:
7702: # ------------------------------------------------------ Read spare server file
7703: {
7704: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
7705:
7706: while (my $configline=<$config>) {
7707: chomp($configline);
7708: if ($configline) {
7709: my ($host,$type) = split(':',$configline,2);
7710: if (!defined($type) || $type eq '') { $type = 'default' };
7711: push(@{ $spareid{$type} }, $host);
7712: }
7713: }
7714: close($config);
7715: }
7716: # ------------------------------------------------------------ Read permissions
7717: {
7718: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
7719:
7720: while (my $configline=<$config>) {
7721: chomp($configline);
7722: if ($configline) {
7723: my ($role,$perm)=split(/ /,$configline);
7724: if ($perm ne '') { $pr{$role}=$perm; }
7725: }
7726: }
7727: close($config);
7728: }
7729:
7730: # -------------------------------------------- Read plain texts for permissions
7731: {
7732: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
7733:
7734: while (my $configline=<$config>) {
7735: chomp($configline);
7736: if ($configline) {
7737: my ($short,@plain)=split(/:/,$configline);
7738: %{$prp{$short}} = ();
7739: if (@plain > 0) {
7740: $prp{$short}{'std'} = $plain[0];
7741: for (my $i=1; $i<@plain; $i++) {
7742: $prp{$short}{'alt'.$i} = $plain[$i];
7743: }
7744: }
7745: }
7746: }
7747: close($config);
7748: }
7749:
7750: # ---------------------------------------------------------- Read package table
7751: {
7752: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
7753:
7754: while (my $configline=<$config>) {
7755: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
7756: chomp($configline);
7757: my ($short,$plain)=split(/:/,$configline);
7758: my ($pack,$name)=split(/\&/,$short);
7759: if ($plain ne '') {
7760: $packagetab{$pack.'&'.$name.'&name'}=$name;
7761: $packagetab{$short}=$plain;
7762: }
7763: }
7764: close($config);
7765: }
7766:
7767: # ------------- set up temporary directory
7768: {
7769: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
7770:
7771: }
7772:
7773: $memcache=new Cache::Memcached({'servers' => ['127.0.0.1:11211'],
7774: 'compress_threshold'=> 20_000,
7775: });
7776:
7777: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
7778: $dumpcount=0;
7779:
7780: &logtouch();
7781: &logthis('<font color="yellow">INFO: Read configuration</font>');
7782: $readit=1;
7783: {
7784: use integer;
7785: my $test=(2**32)+1;
7786: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
7787: &logthis(" Detected 64bit platform ($_64bit)");
7788: }
7789: }
7790: }
7791:
7792: 1;
7793: __END__
7794:
7795: =pod
7796:
7797: =head1 NAME
7798:
7799: Apache::lonnet - Subroutines to ask questions about things in the network.
7800:
7801: =head1 SYNOPSIS
7802:
7803: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
7804:
7805: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
7806:
7807: Common parameters:
7808:
7809: =over 4
7810:
7811: =item *
7812:
7813: $uname : an internal username (if $cname expecting a course Id specifically)
7814:
7815: =item *
7816:
7817: $udom : a domain (if $cdom expecting a course's domain specifically)
7818:
7819: =item *
7820:
7821: $symb : a resource instance identifier
7822:
7823: =item *
7824:
7825: $namespace : the name of a .db file that contains the data needed or
7826: being set.
7827:
7828: =back
7829:
7830: =head1 OVERVIEW
7831:
7832: lonnet provides subroutines which interact with the
7833: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
7834: about classes, users, and resources.
7835:
7836: For many of these objects you can also use this to store data about
7837: them or modify them in various ways.
7838:
7839: =head2 Symbs
7840:
7841: To identify a specific instance of a resource, LON-CAPA uses symbols
7842: or "symbs"X<symb>. These identifiers are built from the URL of the
7843: map, the resource number of the resource in the map, and the URL of
7844: the resource itself. The latter is somewhat redundant, but might help
7845: if maps change.
7846:
7847: An example is
7848:
7849: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
7850:
7851: The respective map entry is
7852:
7853: <resource id="19" src="/res/msu/korte/tests/part12.problem"
7854: title="Problem 2">
7855: </resource>
7856:
7857: Symbs are used by the random number generator, as well as to store and
7858: restore data specific to a certain instance of for example a problem.
7859:
7860: =head2 Storing And Retrieving Data
7861:
7862: X<store()>X<cstore()>X<restore()>Three of the most important functions
7863: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
7864: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
7865: is is the non-critical message twin of cstore. These functions are for
7866: handlers to store a perl hash to a user's permanent data space in an
7867: easy manner, and to retrieve it again on another call. It is expected
7868: that a handler would use this once at the beginning to retrieve data,
7869: and then again once at the end to send only the new data back.
7870:
7871: The data is stored in the user's data directory on the user's
7872: homeserver under the ID of the course.
7873:
7874: The hash that is returned by restore will have all of the previous
7875: value for all of the elements of the hash.
7876:
7877: Example:
7878:
7879: #creating a hash
7880: my %hash;
7881: $hash{'foo'}='bar';
7882:
7883: #storing it
7884: &Apache::lonnet::cstore(\%hash);
7885:
7886: #changing a value
7887: $hash{'foo'}='notbar';
7888:
7889: #adding a new value
7890: $hash{'bar'}='foo';
7891: &Apache::lonnet::cstore(\%hash);
7892:
7893: #retrieving the hash
7894: my %history=&Apache::lonnet::restore();
7895:
7896: #print the hash
7897: foreach my $key (sort(keys(%history))) {
7898: print("\%history{$key} = $history{$key}");
7899: }
7900:
7901: Will print out:
7902:
7903: %history{1:foo} = bar
7904: %history{1:keys} = foo:timestamp
7905: %history{1:timestamp} = 990455579
7906: %history{2:bar} = foo
7907: %history{2:foo} = notbar
7908: %history{2:keys} = foo:bar:timestamp
7909: %history{2:timestamp} = 990455580
7910: %history{bar} = foo
7911: %history{foo} = notbar
7912: %history{timestamp} = 990455580
7913: %history{version} = 2
7914:
7915: Note that the special hash entries C<keys>, C<version> and
7916: C<timestamp> were added to the hash. C<version> will be equal to the
7917: total number of versions of the data that have been stored. The
7918: C<timestamp> attribute will be the UNIX time the hash was
7919: stored. C<keys> is available in every historical section to list which
7920: keys were added or changed at a specific historical revision of a
7921: hash.
7922:
7923: B<Warning>: do not store the hash that restore returns directly. This
7924: will cause a mess since it will restore the historical keys as if the
7925: were new keys. I.E. 1:foo will become 1:1:foo etc.
7926:
7927: Calling convention:
7928:
7929: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
7930: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
7931:
7932: For more detailed information, see lonnet specific documentation.
7933:
7934: =head1 RETURN MESSAGES
7935:
7936: =over 4
7937:
7938: =item * B<con_lost>: unable to contact remote host
7939:
7940: =item * B<con_delayed>: unable to contact remote host, message will be delivered
7941: when the connection is brought back up
7942:
7943: =item * B<con_failed>: unable to contact remote host and unable to save message
7944: for later delivery
7945:
7946: =item * B<error:>: an error a occured, a description of the error follows the :
7947:
7948: =item * B<no_such_host>: unable to fund a host associated with the user/domain
7949: that was requested
7950:
7951: =back
7952:
7953: =head1 PUBLIC SUBROUTINES
7954:
7955: =head2 Session Environment Functions
7956:
7957: =over 4
7958:
7959: =item *
7960: X<appenv()>
7961: B<appenv(%hash)>: the value of %hash is written to
7962: the user envirnoment file, and will be restored for each access this
7963: user makes during this session, also modifies the %env for the current
7964: process
7965:
7966: =item *
7967: X<delenv()>
7968: B<delenv($regexp)>: removes all items from the session
7969: environment file that matches the regular expression in $regexp. The
7970: values are also delted from the current processes %env.
7971:
7972: =item * get_env_multiple($name)
7973:
7974: gets $name from the %env hash, it seemlessly handles the cases where multiple
7975: values may be defined and end up as an array ref.
7976:
7977: returns an array of values
7978:
7979: =back
7980:
7981: =head2 User Information
7982:
7983: =over 4
7984:
7985: =item *
7986: X<queryauthenticate()>
7987: B<queryauthenticate($uname,$udom)>: try to determine user's current
7988: authentication scheme
7989:
7990: =item *
7991: X<authenticate()>
7992: B<authenticate($uname,$upass,$udom)>: try to
7993: authenticate user from domain's lib servers (first use the current
7994: one). C<$upass> should be the users password.
7995:
7996: =item *
7997: X<homeserver()>
7998: B<homeserver($uname,$udom)>: find the server which has
7999: the user's directory and files (there must be only one), this caches
8000: the answer, and also caches if there is a borken connection.
8001:
8002: =item *
8003: X<idget()>
8004: B<idget($udom,@ids)>: find the usernames behind a list of IDs
8005: (IDs are a unique resource in a domain, there must be only 1 ID per
8006: username, and only 1 username per ID in a specific domain) (returns
8007: hash: id=>name,id=>name)
8008:
8009: =item *
8010: X<idrget()>
8011: B<idrget($udom,@unames)>: find the IDs behind a list of
8012: usernames (returns hash: name=>id,name=>id)
8013:
8014: =item *
8015: X<idput()>
8016: B<idput($udom,%ids)>: store away a list of names and associated IDs
8017:
8018: =item *
8019: X<rolesinit()>
8020: B<rolesinit($udom,$username,$authhost)>: get user privileges
8021:
8022: =item *
8023: X<getsection()>
8024: B<getsection($udom,$uname,$cname)>: finds the section of student in the
8025: course $cname, return section name/number or '' for "not in course"
8026: and '-1' for "no section"
8027:
8028: =item *
8029: X<userenvironment()>
8030: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
8031: passed in @what from the requested user's environment, returns a hash
8032:
8033: =back
8034:
8035: =head2 User Roles
8036:
8037: =over 4
8038:
8039: =item *
8040:
8041: allowed($priv,$uri,$symb,$role) : check for a user privilege; returns codes for allowed actions
8042: F: full access
8043: U,I,K: authentication modes (cxx only)
8044: '': forbidden
8045: 1: user needs to choose course
8046: 2: browse allowed
8047: A: passphrase authentication needed
8048:
8049: =item *
8050:
8051: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
8052: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
8053: and course level
8054:
8055: =item *
8056:
8057: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
8058: explanation of a user role term
8059:
8060: =item *
8061:
8062: get_my_roles($uname,$udom,$types,$roles,$roledoms) : All arguments are
8063: optional. Returns a hash of a user's roles, with keys set to
8064: colon-sparated $uname,$udom,and $role, and value set to
8065: colon-separated start and end times for the role. If no username and
8066: domain are specified, will default to current user/domain. Types,
8067: roles, and roledoms are references to arrays, of role statuses
8068: (active, future or previous), roles (e.g., cc,in, st etc.) and domains
8069: of the roles which can be used to restrict the list if roles
8070: reported. If no array ref is provided for types, will default to
8071: return only active roles.
8072:
8073: =back
8074:
8075: =head2 User Modification
8076:
8077: =over 4
8078:
8079: =item *
8080:
8081: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
8082: user for the level given by URL. Optional start and end dates (leave empty
8083: string or zero for "no date")
8084:
8085: =item *
8086:
8087: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
8088: change a users, password, possible return values are: ok,
8089: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
8090: refused
8091:
8092: =item *
8093:
8094: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
8095:
8096: =item *
8097:
8098: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
8099: modify user
8100:
8101: =item *
8102:
8103: modifystudent
8104:
8105: modify a students enrollment and identification information.
8106: The course id is resolved based on the current users environment.
8107: This means the envoking user must be a course coordinator or otherwise
8108: associated with a course.
8109:
8110: This call is essentially a wrapper for lonnet::modifyuser and
8111: lonnet::modify_student_enrollment
8112:
8113: Inputs:
8114:
8115: =over 4
8116:
8117: =item B<$udom> Students loncapa domain
8118:
8119: =item B<$uname> Students loncapa login name
8120:
8121: =item B<$uid> Students id/student number
8122:
8123: =item B<$umode> Students authentication mode
8124:
8125: =item B<$upass> Students password
8126:
8127: =item B<$first> Students first name
8128:
8129: =item B<$middle> Students middle name
8130:
8131: =item B<$last> Students last name
8132:
8133: =item B<$gene> Students generation
8134:
8135: =item B<$usec> Students section in course
8136:
8137: =item B<$end> Unix time of the roles expiration
8138:
8139: =item B<$start> Unix time of the roles start date
8140:
8141: =item B<$forceid> If defined, allow $uid to be changed
8142:
8143: =item B<$desiredhome> server to use as home server for student
8144:
8145: =back
8146:
8147: =item *
8148:
8149: modify_student_enrollment
8150:
8151: Change a students enrollment status in a class. The environment variable
8152: 'role.request.course' must be defined for this function to proceed.
8153:
8154: Inputs:
8155:
8156: =over 4
8157:
8158: =item $udom, students domain
8159:
8160: =item $uname, students name
8161:
8162: =item $uid, students user id
8163:
8164: =item $first, students first name
8165:
8166: =item $middle
8167:
8168: =item $last
8169:
8170: =item $gene
8171:
8172: =item $usec
8173:
8174: =item $end
8175:
8176: =item $start
8177:
8178: =back
8179:
8180:
8181: =item *
8182:
8183: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
8184: custom role; give a custom role to a user for the level given by URL. Specify
8185: name and domain of role author, and role name
8186:
8187: =item *
8188:
8189: revokerole($udom,$uname,$url,$role) : revoke a role for url
8190:
8191: =item *
8192:
8193: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
8194:
8195: =back
8196:
8197: =head2 Course Infomation
8198:
8199: =over 4
8200:
8201: =item *
8202:
8203: coursedescription($courseid) : returns a hash of information about the
8204: specified course id, including all environment settings for the
8205: course, the description of the course will be in the hash under the
8206: key 'description'
8207:
8208: =item *
8209:
8210: resdata($name,$domain,$type,@which) : request for current parameter
8211: setting for a specific $type, where $type is either 'course' or 'user',
8212: @what should be a list of parameters to ask about. This routine caches
8213: answers for 5 minutes.
8214:
8215: =back
8216:
8217: =head2 Course Modification
8218:
8219: =over 4
8220:
8221: =item *
8222:
8223: writecoursepref($courseid,%prefs) : write preferences (environment
8224: database) for a course
8225:
8226: =item *
8227:
8228: createcourse($udom,$description,$url) : make/modify course
8229:
8230: =back
8231:
8232: =head2 Resource Subroutines
8233:
8234: =over 4
8235:
8236: =item *
8237:
8238: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
8239:
8240: =item *
8241:
8242: repcopy($filename) : subscribes to the requested file, and attempts to
8243: replicate from the owning library server, Might return
8244: 'unavailable', 'not_found', 'forbidden', 'ok', or
8245: 'bad_request', also attempts to grab the metadata for the
8246: resource. Expects the local filesystem pathname
8247: (/home/httpd/html/res/....)
8248:
8249: =back
8250:
8251: =head2 Resource Information
8252:
8253: =over 4
8254:
8255: =item *
8256:
8257: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
8258: a vairety of different possible values, $varname should be a request
8259: string, and the other parameters can be used to specify who and what
8260: one is asking about.
8261:
8262: Possible values for $varname are environment.lastname (or other item
8263: from the envirnment hash), user.name (or someother aspect about the
8264: user), resource.0.maxtries (or some other part and parameter of a
8265: resource)
8266:
8267: =item *
8268:
8269: directcondval($number) : get current value of a condition; reads from a state
8270: string
8271:
8272: =item *
8273:
8274: condval($condidx) : value of condition index based on state
8275:
8276: =item *
8277:
8278: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
8279: resource's metadata, $what should be either a specific key, or either
8280: 'keys' (to get a list of possible keys) or 'packages' to get a list of
8281: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
8282:
8283: this function automatically caches all requests
8284:
8285: =item *
8286:
8287: metadata_query($query,$custom,$customshow) : make a metadata query against the
8288: network of library servers; returns file handle of where SQL and regex results
8289: will be stored for query
8290:
8291: =item *
8292:
8293: symbread($filename) : return symbolic list entry (filename argument optional);
8294: returns the data handle
8295:
8296: =item *
8297:
8298: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
8299: a possible symb for the URL in $thisfn, and if is an encryypted
8300: resource that the user accessed using /enc/ returns a 1 on success, 0
8301: on failure, user must be in a course, as it assumes the existance of
8302: the course initial hash, and uses $env('request.course.id'}
8303:
8304:
8305: =item *
8306:
8307: symbclean($symb) : removes versions numbers from a symb, returns the
8308: cleaned symb
8309:
8310: =item *
8311:
8312: is_on_map($uri) : checks if the $uri is somewhere on the current
8313: course map, user must be in a course for it to work.
8314:
8315: =item *
8316:
8317: numval($salt) : return random seed value (addend for rndseed)
8318:
8319: =item *
8320:
8321: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
8322: a random seed, all arguments are optional, if they aren't sent it uses the
8323: environment to derive them. Note: if symb isn't sent and it can't get one
8324: from &symbread it will use the current time as its return value
8325:
8326: =item *
8327:
8328: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
8329: unfakeable, receipt
8330:
8331: =item *
8332:
8333: receipt() : API to ireceipt working off of env values; given out to users
8334:
8335: =item *
8336:
8337: countacc($url) : count the number of accesses to a given URL
8338:
8339: =item *
8340:
8341: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
8342:
8343: =item *
8344:
8345: checkin($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 $tcrsid)
8346:
8347: =item *
8348:
8349: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
8350:
8351: =item *
8352:
8353: devalidate($symb) : devalidate temporary spreadsheet calculations,
8354: forcing spreadsheet to reevaluate the resource scores next time.
8355:
8356: =back
8357:
8358: =head2 Storing/Retreiving Data
8359:
8360: =over 4
8361:
8362: =item *
8363:
8364: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
8365: for this url; hashref needs to be given and should be a \%hashname; the
8366: remaining args aren't required and if they aren't passed or are '' they will
8367: be derived from the env
8368:
8369: =item *
8370:
8371: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
8372: uses critical subroutine
8373:
8374: =item *
8375:
8376: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
8377: all args are optional
8378:
8379: =item *
8380:
8381: dumpstore($namespace,$udom,$uname,$regexp,$range) :
8382: dumps the complete (or key matching regexp) namespace into a hash
8383: ($udom, $uname, $regexp, $range are optional) for a namespace that is
8384: normally &store()ed into
8385:
8386: $range should be either an integer '100' (give me the first 100
8387: matching records)
8388: or be two integers sperated by a - with no spaces
8389: '30-50' (give me the 30th through the 50th matching
8390: records)
8391:
8392:
8393: =item *
8394:
8395: putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
8396: replaces a &store() version of data with a replacement set of data
8397: for a particular resource in a namespace passed in the $storehash hash
8398: reference
8399:
8400: =item *
8401:
8402: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
8403: works very similar to store/cstore, but all data is stored in a
8404: temporary location and can be reset using tmpreset, $storehash should
8405: be a hash reference, returns nothing on success
8406:
8407: =item *
8408:
8409: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
8410: similar to restore, but all data is stored in a temporary location and
8411: can be reset using tmpreset. Returns a hash of values on success,
8412: error string otherwise.
8413:
8414: =item *
8415:
8416: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
8417: deltes all keys for $symb form the temporary storage hash.
8418:
8419: =item *
8420:
8421: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
8422: reference filled in from namesp ($udom and $uname are optional)
8423:
8424: =item *
8425:
8426: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
8427: namesp ($udom and $uname are optional)
8428:
8429: =item *
8430:
8431: dump($namespace,$udom,$uname,$regexp,$range) :
8432: dumps the complete (or key matching regexp) namespace into a hash
8433: ($udom, $uname, $regexp, $range are optional)
8434:
8435: $range should be either an integer '100' (give me the first 100
8436: matching records)
8437: or be two integers sperated by a - with no spaces
8438: '30-50' (give me the 30th through the 50th matching
8439: records)
8440: =item *
8441:
8442: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
8443: $store can be a scalar, an array reference, or if the amount to be
8444: incremented is > 1, a hash reference.
8445:
8446: ($udom and $uname are optional)
8447:
8448: =item *
8449:
8450: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
8451: ($udom and $uname are optional)
8452:
8453: =item *
8454:
8455: cput($namespace,$storehash,$udom,$uname) : critical put
8456: ($udom and $uname are optional)
8457:
8458: =item *
8459:
8460: newput($namespace,$storehash,$udom,$uname) :
8461:
8462: Attempts to store the items in the $storehash, but only if they don't
8463: currently exist, if this succeeds you can be certain that you have
8464: successfully created a new key value pair in the $namespace db.
8465:
8466:
8467: Args:
8468: $namespace: name of database to store values to
8469: $storehash: hashref to store to the db
8470: $udom: (optional) domain of user containing the db
8471: $uname: (optional) name of user caontaining the db
8472:
8473: Returns:
8474: 'ok' -> succeeded in storing all keys of $storehash
8475: 'key_exists: <key>' -> failed to anything out of $storehash, as at
8476: least <key> already existed in the db (other
8477: requested keys may also already exist)
8478: 'error: <msg>' -> unable to tie the DB or other erorr occured
8479: 'con_lost' -> unable to contact request server
8480: 'refused' -> action was not allowed by remote machine
8481:
8482:
8483: =item *
8484:
8485: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
8486: reference filled in from namesp (encrypts the return communication)
8487: ($udom and $uname are optional)
8488:
8489: =item *
8490:
8491: log($udom,$name,$home,$message) : write to permanent log for user; use
8492: critical subroutine
8493:
8494: =item *
8495:
8496: get_dom($namespace,$storearr,$udomain) : returns hash with keys from array
8497: reference filled in from namespace found in domain level on primary domain server ($udomain is optional)
8498:
8499: =item *
8500:
8501: put_dom($namespace,$storehash,$udomain) : stores hash in namespace at domain level on primary domain server ($udomain is optional)
8502:
8503: =back
8504:
8505: =head2 Network Status Functions
8506:
8507: =over 4
8508:
8509: =item *
8510:
8511: dirlist($uri) : return directory list based on URI
8512:
8513: =item *
8514:
8515: spareserver() : find server with least workload from spare.tab
8516:
8517: =back
8518:
8519: =head2 Apache Request
8520:
8521: =over 4
8522:
8523: =item *
8524:
8525: ssi($url,%hash) : server side include, does a complete request cycle on url to
8526: localhost, posts hash
8527:
8528: =back
8529:
8530: =head2 Data to String to Data
8531:
8532: =over 4
8533:
8534: =item *
8535:
8536: hash2str(%hash) : convert a hash into a string complete with escaping and '='
8537: and '&' separators, supports elements that are arrayrefs and hashrefs
8538:
8539: =item *
8540:
8541: hashref2str($hashref) : convert a hashref into a string complete with
8542: escaping and '=' and '&' separators, supports elements that are
8543: arrayrefs and hashrefs
8544:
8545: =item *
8546:
8547: arrayref2str($arrayref) : convert an arrayref into a string complete
8548: with escaping and '&' separators, supports elements that are arrayrefs
8549: and hashrefs
8550:
8551: =item *
8552:
8553: str2hash($string) : convert string to hash using unescaping and
8554: splitting on '=' and '&', supports elements that are arrayrefs and
8555: hashrefs
8556:
8557: =item *
8558:
8559: str2array($string) : convert string to hash using unescaping and
8560: splitting on '&', supports elements that are arrayrefs and hashrefs
8561:
8562: =back
8563:
8564: =head2 Logging Routines
8565:
8566: =over 4
8567:
8568: These routines allow one to make log messages in the lonnet.log and
8569: lonnet.perm logfiles.
8570:
8571: =item *
8572:
8573: logtouch() : make sure the logfile, lonnet.log, exists
8574:
8575: =item *
8576:
8577: logthis() : append message to the normal lonnet.log file, it gets
8578: preiodically rolled over and deleted.
8579:
8580: =item *
8581:
8582: logperm() : append a permanent message to lonnet.perm.log, this log
8583: file never gets deleted by any automated portion of the system, only
8584: messages of critical importance should go in here.
8585:
8586: =back
8587:
8588: =head2 General File Helper Routines
8589:
8590: =over 4
8591:
8592: =item *
8593:
8594: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
8595: (a) files in /uploaded
8596: (i) If a local copy of the file exists -
8597: compares modification date of local copy with last-modified date for
8598: definitive version stored on home server for course. If local copy is
8599: stale, requests a new version from the home server and stores it.
8600: If the original has been removed from the home server, then local copy
8601: is unlinked.
8602: (ii) If local copy does not exist -
8603: requests the file from the home server and stores it.
8604:
8605: If $caller is 'uploadrep':
8606: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
8607: for request for files originally uploaded via DOCS.
8608: - returns 'ok' if fresh local copy now available, -1 otherwise.
8609:
8610: Otherwise:
8611: This indicates a call from the content generation phase of the request.
8612: - returns the entire contents of the file or -1.
8613:
8614: (b) files in /res
8615: - returns the entire contents of a file or -1;
8616: it properly subscribes to and replicates the file if neccessary.
8617:
8618:
8619: =item *
8620:
8621: stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
8622: reference
8623:
8624: returns either a stat() list of data about the file or an empty list
8625: if the file doesn't exist or couldn't find out about it (connection
8626: problems or user unknown)
8627:
8628: =item *
8629:
8630: filelocation($dir,$file) : returns file system location of a file
8631: based on URI; meant to be "fairly clean" absolute reference, $dir is a
8632: directory that relative $file lookups are to looked in ($dir of /a/dir
8633: and a file of ../bob will become /a/bob)
8634:
8635: =item *
8636:
8637: hreflocation($dir,$file) : returns file system location or a URL; same as
8638: filelocation except for hrefs
8639:
8640: =item *
8641:
8642: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
8643:
8644: =back
8645:
8646: =head2 Usererfile file routines (/uploaded*)
8647:
8648: =over 4
8649:
8650: =item *
8651:
8652: userfileupload(): main rotine for putting a file in a user or course's
8653: filespace, arguments are,
8654:
8655: formname - required - this is the name of the element in $env where the
8656: filename, and the contents of the file to create/modifed exist
8657: the filename is in $env{'form.'.$formname.'.filename'} and the
8658: contents of the file is located in $env{'form.'.$formname}
8659: coursedoc - if true, store the file in the course of the active role
8660: of the current user
8661: subdir - required - subdirectory to put the file in under ../userfiles/
8662: if undefined, it will be placed in "unknown"
8663:
8664: (This routine calls clean_filename() to remove any dangerous
8665: characters from the filename, and then calls finuserfileupload() to
8666: complete the transaction)
8667:
8668: returns either the url of the uploaded file (/uploaded/....) if successful
8669: and /adm/notfound.html if unsuccessful
8670:
8671: =item *
8672:
8673: clean_filename(): routine for cleaing a filename up for storage in
8674: userfile space, argument is:
8675:
8676: filename - proposed filename
8677:
8678: returns: the new clean filename
8679:
8680: =item *
8681:
8682: finishuserfileupload(): routine that creaes and sends the file to
8683: userspace, probably shouldn't be called directly
8684:
8685: docuname: username or courseid of destination for the file
8686: docudom: domain of user/course of destination for the file
8687: formname: same as for userfileupload()
8688: fname: filename (inculding subdirectories) for the file
8689:
8690: returns either the url of the uploaded file (/uploaded/....) if successful
8691: and /adm/notfound.html if unsuccessful
8692:
8693: =item *
8694:
8695: renameuserfile(): renames an existing userfile to a new name
8696:
8697: Args:
8698: docuname: username or courseid of destination for the file
8699: docudom: domain of user/course of destination for the file
8700: old: current file name (including any subdirs under userfiles)
8701: new: desired file name (including any subdirs under userfiles)
8702:
8703: =item *
8704:
8705: mkdiruserfile(): creates a directory is a userfiles dir
8706:
8707: Args:
8708: docuname: username or courseid of destination for the file
8709: docudom: domain of user/course of destination for the file
8710: dir: dir to create (including any subdirs under userfiles)
8711:
8712: =item *
8713:
8714: removeuserfile(): removes a file that exists in userfiles
8715:
8716: Args:
8717: docuname: username or courseid of destination for the file
8718: docudom: domain of user/course of destination for the file
8719: fname: filname to delete (including any subdirs under userfiles)
8720:
8721: =item *
8722:
8723: removeuploadedurl(): convience function for removeuserfile()
8724:
8725: Args:
8726: url: a full /uploaded/... url to delete
8727:
8728: =item *
8729:
8730: get_portfile_permissions():
8731: Args:
8732: domain: domain of user or course contain the portfolio files
8733: user: name of user or num of course contain the portfolio files
8734: Returns:
8735: hashref of a dump of the proper file_permissions.db
8736:
8737:
8738: =item *
8739:
8740: get_access_controls():
8741:
8742: Args:
8743: current_permissions: the hash ref returned from get_portfile_permissions()
8744: group: (optional) the group you want the files associated with
8745: file: (optional) the file you want access info on
8746:
8747: Returns:
8748: a hash (keys are file names) of hashes containing
8749: keys are: path to file/file_name\0uniqueID:scope_end_start (see below)
8750: values are XML containing access control settings (see below)
8751:
8752: Internal notes:
8753:
8754: access controls are stored in file_permissions.db as key=value pairs.
8755: key -> path to file/file_name\0uniqueID:scope_end_start
8756: where scope -> public,guest,course,group,domains or users.
8757: end -> UNIX time for end of access (0 -> no end date)
8758: start -> UNIX time for start of access
8759:
8760: value -> XML description of access control
8761: <scope type=""> (type =1 of: public,guest,course,group,domains,users">
8762: <start></start>
8763: <end></end>
8764:
8765: <password></password> for scope type = guest
8766:
8767: <domain></domain> for scope type = course or group
8768: <number></number>
8769: <roles id="">
8770: <role></role>
8771: <access></access>
8772: <section></section>
8773: <group></group>
8774: </roles>
8775:
8776: <dom></dom> for scope type = domains
8777:
8778: <users> for scope type = users
8779: <user>
8780: <uname></uname>
8781: <udom></udom>
8782: </user>
8783: </users>
8784: </scope>
8785:
8786: Access data is also aggregated for each file in an additional key=value pair:
8787: key -> path to file/file_name\0accesscontrol
8788: value -> reference to hash
8789: hash contains key = value pairs
8790: where key = uniqueID:scope_end_start
8791: value = UNIX time record was last updated
8792:
8793: Used to improve speed of look-ups of access controls for each file.
8794:
8795: Locks on files (resulting from submission of portfolio file to a homework problem stored in array of arrays.
8796:
8797: modify_access_controls():
8798:
8799: Modifies access controls for a portfolio file
8800: Args
8801: 1. file name
8802: 2. reference to hash of required changes,
8803: 3. domain
8804: 4. username
8805: where domain,username are the domain of the portfolio owner
8806: (either a user or a course)
8807:
8808: Returns:
8809: 1. result of additions or updates ('ok' or 'error', with error message).
8810: 2. result of deletions ('ok' or 'error', with error message).
8811: 3. reference to hash of any new or updated access controls.
8812: 4. reference to hash used to map incoming IDs to uniqueIDs assigned to control.
8813: key = integer (inbound ID)
8814: value = uniqueID
8815:
8816: =back
8817:
8818: =head2 HTTP Helper Routines
8819:
8820: =over 4
8821:
8822: =item *
8823:
8824: escape() : unpack non-word characters into CGI-compatible hex codes
8825:
8826: =item *
8827:
8828: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
8829:
8830: =back
8831:
8832: =head1 PRIVATE SUBROUTINES
8833:
8834: =head2 Underlying communication routines (Shouldn't call)
8835:
8836: =over 4
8837:
8838: =item *
8839:
8840: subreply() : tries to pass a message to lonc, returns con_lost if incapable
8841:
8842: =item *
8843:
8844: reply() : uses subreply to send a message to remote machine, logs all failures
8845:
8846: =item *
8847:
8848: critical() : passes a critical message to another server; if cannot
8849: get through then place message in connection buffer directory and
8850: returns con_delayed, if incapable of saving message, returns
8851: con_failed
8852:
8853: =item *
8854:
8855: reconlonc() : tries to reconnect lonc client processes.
8856:
8857: =back
8858:
8859: =head2 Resource Access Logging
8860:
8861: =over 4
8862:
8863: =item *
8864:
8865: flushcourselogs() : flush (save) buffer logs and access logs
8866:
8867: =item *
8868:
8869: courselog($what) : save message for course in hash
8870:
8871: =item *
8872:
8873: courseacclog($what) : save message for course using &courselog(). Perform
8874: special processing for specific resource types (problems, exams, quizzes, etc).
8875:
8876: =item *
8877:
8878: goodbye() : flush course logs and log shutting down; it is called in srm.conf
8879: as a PerlChildExitHandler
8880:
8881: =back
8882:
8883: =head2 Other
8884:
8885: =over 4
8886:
8887: =item *
8888:
8889: symblist($mapname,%newhash) : update symbolic storage links
8890:
8891: =back
8892:
8893: =cut
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