1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.840 2007/03/02 23:53:19 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonnet;
31:
32: use strict;
33: use LWP::UserAgent();
34: use HTTP::Headers;
35: use HTTP::Date;
36: # use Date::Parse;
37: use vars
38: qw(%perlvar %badServerCache %iphost %spareid %hostdom
39: %libserv %pr %prp $memcache %packagetab
40: %courselogs %accesshash %userrolehash %domainrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf %coursetypebuf
42: %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati %domain_primary
44: $tmpdir $_64bit %env);
45:
46: use IO::Socket;
47: use GDBM_File;
48: use HTML::LCParser;
49: use HTML::Parser;
50: use Fcntl qw(:flock);
51: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
52: use Time::HiRes qw( gettimeofday tv_interval );
53: use Cache::Memcached;
54: use Digest::MD5;
55: use Math::Random;
56: use LONCAPA qw(:DEFAULT :match);
57: use LONCAPA::Configuration;
58:
59: my $readit;
60: my $max_connection_retries = 10; # Or some such value.
61:
62: require Exporter;
63:
64: our @ISA = qw (Exporter);
65: our @EXPORT = qw(%env);
66:
67: =pod
68:
69: =head1 Package Variables
70:
71: These are largely undocumented, so if you decipher one please note it here.
72:
73: =over 4
74:
75: =item $processmarker
76:
77: Contains the time this process was started and this servers host id.
78:
79: =item $dumpcount
80:
81: Counts the number of times a message log flush has been attempted (regardless
82: of success) by this process. Used as part of the filename when messages are
83: delayed.
84:
85: =back
86:
87: =cut
88:
89:
90: # --------------------------------------------------------------------- Logging
91: {
92: my $logid;
93: sub instructor_log {
94: my ($hash_name,$storehash,$delflag,$uname,$udom)=@_;
95: $logid++;
96: my $id=time().'00000'.$$.'00000'.$logid;
97: return &Apache::lonnet::put('nohist_'.$hash_name,
98: { $id => {
99: 'exe_uname' => $env{'user.name'},
100: 'exe_udom' => $env{'user.domain'},
101: 'exe_time' => time(),
102: 'exe_ip' => $ENV{'REMOTE_ADDR'},
103: 'delflag' => $delflag,
104: 'logentry' => $storehash,
105: 'uname' => $uname,
106: 'udom' => $udom,
107: }
108: },
109: $env{'course.'.$env{'request.course.id'}.'.domain'},
110: $env{'course.'.$env{'request.course.id'}.'.num'}
111: );
112: }
113: }
114:
115: sub logtouch {
116: my $execdir=$perlvar{'lonDaemons'};
117: unless (-e "$execdir/logs/lonnet.log") {
118: open(my $fh,">>$execdir/logs/lonnet.log");
119: close $fh;
120: }
121: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
122: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
123: }
124:
125: sub logthis {
126: my $message=shift;
127: my $execdir=$perlvar{'lonDaemons'};
128: my $now=time;
129: my $local=localtime($now);
130: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
131: print $fh "$local ($$): $message\n";
132: close($fh);
133: }
134: return 1;
135: }
136:
137: sub logperm {
138: my $message=shift;
139: my $execdir=$perlvar{'lonDaemons'};
140: my $now=time;
141: my $local=localtime($now);
142: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
143: print $fh "$now:$message:$local\n";
144: close($fh);
145: }
146: return 1;
147: }
148:
149: # -------------------------------------------------- Non-critical communication
150: sub subreply {
151: my ($cmd,$server)=@_;
152: my $peerfile="$perlvar{'lonSockDir'}/".&hostname($server);
153: #
154: # With loncnew process trimming, there's a timing hole between lonc server
155: # process exit and the master server picking up the listen on the AF_UNIX
156: # socket. In that time interval, a lock file will exist:
157:
158: my $lockfile=$peerfile.".lock";
159: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
160: sleep(1);
161: }
162: # At this point, either a loncnew parent is listening or an old lonc
163: # or loncnew child is listening so we can connect or everything's dead.
164: #
165: # We'll give the connection a few tries before abandoning it. If
166: # connection is not possible, we'll con_lost back to the client.
167: #
168: my $client;
169: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
170: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
171: Type => SOCK_STREAM,
172: Timeout => 10);
173: if($client) {
174: last; # Connected!
175: }
176: sleep(1); # Try again later if failed connection.
177: }
178: my $answer;
179: if ($client) {
180: print $client "sethost:$server:$cmd\n";
181: $answer=<$client>;
182: if (!$answer) { $answer="con_lost"; }
183: chomp($answer);
184: } else {
185: $answer = 'con_lost'; # Failed connection.
186: }
187: return $answer;
188: }
189:
190: sub reply {
191: my ($cmd,$server)=@_;
192: unless (defined(&hostname($server))) { return 'no_such_host'; }
193: my $answer=subreply($cmd,$server);
194: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
195: &logthis("<font color=\"blue\">WARNING:".
196: " $cmd to $server returned $answer</font>");
197: }
198: return $answer;
199: }
200:
201: # ----------------------------------------------------------- Send USR1 to lonc
202:
203: sub reconlonc {
204: &logthis("Trying to reconnect lonc");
205: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
206: if (open(my $fh,"<$loncfile")) {
207: my $loncpid=<$fh>;
208: chomp($loncpid);
209: if (kill 0 => $loncpid) {
210: &logthis("lonc at pid $loncpid responding, sending USR1");
211: kill USR1 => $loncpid;
212: sleep 1;
213: } else {
214: &logthis(
215: "<font color=\"blue\">WARNING:".
216: " lonc at pid $loncpid not responding, giving up</font>");
217: }
218: } else {
219: &logthis('<font color="blue">WARNING: lonc not running, giving up</font>');
220: }
221: }
222:
223: # ------------------------------------------------------ Critical communication
224:
225: sub critical {
226: my ($cmd,$server)=@_;
227: unless (&hostname($server)) {
228: &logthis("<font color=\"blue\">WARNING:".
229: " Critical message to unknown server ($server)</font>");
230: return 'no_such_host';
231: }
232: my $answer=reply($cmd,$server);
233: if ($answer eq 'con_lost') {
234: &reconlonc("$perlvar{'lonSockDir'}/$server");
235: my $answer=reply($cmd,$server);
236: if ($answer eq 'con_lost') {
237: my $now=time;
238: my $middlename=$cmd;
239: $middlename=substr($middlename,0,16);
240: $middlename=~s/\W//g;
241: my $dfilename=
242: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
243: $dumpcount++;
244: {
245: my $dfh;
246: if (open($dfh,">$dfilename")) {
247: print $dfh "$cmd\n";
248: close($dfh);
249: }
250: }
251: sleep 2;
252: my $wcmd='';
253: {
254: my $dfh;
255: if (open($dfh,"<$dfilename")) {
256: $wcmd=<$dfh>;
257: close($dfh);
258: }
259: }
260: chomp($wcmd);
261: if ($wcmd eq $cmd) {
262: &logthis("<font color=\"blue\">WARNING: ".
263: "Connection buffer $dfilename: $cmd</font>");
264: &logperm("D:$server:$cmd");
265: return 'con_delayed';
266: } else {
267: &logthis("<font color=\"red\">CRITICAL:"
268: ." Critical connection failed: $server $cmd</font>");
269: &logperm("F:$server:$cmd");
270: return 'con_failed';
271: }
272: }
273: }
274: return $answer;
275: }
276:
277: # ------------------------------------------- check if return value is an error
278:
279: sub error {
280: my ($result) = @_;
281: if ($result =~ /^(con_lost|no_such_host|error: (\d+) (.*))/) {
282: if ($2 == 2) { return undef; }
283: return $1;
284: }
285: return undef;
286: }
287:
288: sub convert_and_load_session_env {
289: my ($lonidsdir,$handle)=@_;
290: my @profile;
291: {
292: open(my $idf,"$lonidsdir/$handle.id");
293: flock($idf,LOCK_SH);
294: @profile=<$idf>;
295: close($idf);
296: }
297: my %temp_env;
298: foreach my $line (@profile) {
299: if ($line !~ m/=/) {
300: return 0;
301: }
302: chomp($line);
303: my ($envname,$envvalue)=split(/=/,$line,2);
304: $temp_env{&unescape($envname)} = &unescape($envvalue);
305: }
306: unlink("$lonidsdir/$handle.id");
307: if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",&GDBM_WRCREAT(),
308: 0640)) {
309: %disk_env = %temp_env;
310: @env{keys(%temp_env)} = @disk_env{keys(%temp_env)};
311: untie(%disk_env);
312: }
313: return 1;
314: }
315:
316: # ------------------------------------------- Transfer profile into environment
317: my $env_loaded;
318: sub transfer_profile_to_env {
319: my ($lonidsdir,$handle,$force_transfer) = @_;
320: if (!$force_transfer && $env_loaded) { return; }
321:
322: if (!defined($lonidsdir)) {
323: $lonidsdir = $perlvar{'lonIDsDir'};
324: }
325: if (!defined($handle)) {
326: ($handle) = ($env{'user.environment'} =~m|/([^/]+)\.id$| );
327: }
328:
329: my $convert;
330: {
331: open(my $idf,"$lonidsdir/$handle.id");
332: flock($idf,LOCK_SH);
333: if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",
334: &GDBM_READER(),0640)) {
335: @env{keys(%disk_env)} = @disk_env{keys(%disk_env)};
336: untie(%disk_env);
337: } else {
338: $convert = 1;
339: }
340: }
341: if ($convert) {
342: if (!&convert_and_load_session_env($lonidsdir,$handle)) {
343: &logthis("Failed to load session, or convert session.");
344: }
345: }
346:
347: my %remove;
348: while ( my $envname = each(%env) ) {
349: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
350: if ($time < time-300) {
351: $remove{$key}++;
352: }
353: }
354: }
355:
356: $env{'user.environment'} = "$lonidsdir/$handle.id";
357: $env_loaded=1;
358: foreach my $expired_key (keys(%remove)) {
359: &delenv($expired_key);
360: }
361: }
362:
363: sub timed_flock {
364: my ($file,$lock_type) = @_;
365: my $failed=0;
366: eval {
367: local $SIG{__DIE__}='DEFAULT';
368: local $SIG{ALRM}=sub {
369: $failed=1;
370: die("failed lock");
371: };
372: alarm(13);
373: flock($file,$lock_type);
374: alarm(0);
375: };
376: if ($failed) {
377: return undef;
378: } else {
379: return 1;
380: }
381: }
382:
383: # ---------------------------------------------------------- Append Environment
384:
385: sub appenv {
386: my %newenv=@_;
387: foreach my $key (keys(%newenv)) {
388: if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
389: &logthis("<font color=\"blue\">WARNING: ".
390: "Attempt to modify environment ".$key." to ".$newenv{$key}
391: .'</font>');
392: delete($newenv{$key});
393: } else {
394: $env{$key}=$newenv{$key};
395: }
396: }
397: open(my $env_file,$env{'user.environment'});
398: if (&timed_flock($env_file,LOCK_EX)
399: &&
400: tie(my %disk_env,'GDBM_File',$env{'user.environment'},
401: (&GDBM_WRITER()|&GDBM_NOLOCK()),0640)) {
402: while (my ($key,$value) = each(%newenv)) {
403: $disk_env{$key} = $value;
404: }
405: untie(%disk_env);
406: }
407: return 'ok';
408: }
409: # ----------------------------------------------------- Delete from Environment
410:
411: sub delenv {
412: my $delthis=shift;
413: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
414: &logthis("<font color=\"blue\">WARNING: ".
415: "Attempt to delete from environment ".$delthis);
416: return 'error';
417: }
418: open(my $env_file,$env{'user.environment'});
419: if (&timed_flock($env_file,LOCK_EX)
420: &&
421: tie(my %disk_env,'GDBM_File',$env{'user.environment'},
422: (&GDBM_WRITER()|&GDBM_NOLOCK()),0640)) {
423: foreach my $key (keys(%disk_env)) {
424: if ($key=~/^$delthis/) {
425: delete($env{$key});
426: delete($disk_env{$key});
427: }
428: }
429: untie(%disk_env);
430: }
431: return 'ok';
432: }
433:
434: sub get_env_multiple {
435: my ($name) = @_;
436: my @values;
437: if (defined($env{$name})) {
438: # exists is it an array
439: if (ref($env{$name})) {
440: @values=@{ $env{$name} };
441: } else {
442: $values[0]=$env{$name};
443: }
444: }
445: return(@values);
446: }
447:
448: # ------------------------------------------ Find out current server userload
449: # there is a copy in lond
450: sub userload {
451: my $numusers=0;
452: {
453: opendir(LONIDS,$perlvar{'lonIDsDir'});
454: my $filename;
455: my $curtime=time;
456: while ($filename=readdir(LONIDS)) {
457: if ($filename eq '.' || $filename eq '..') {next;}
458: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
459: if ($curtime-$mtime < 1800) { $numusers++; }
460: }
461: closedir(LONIDS);
462: }
463: my $userloadpercent=0;
464: my $maxuserload=$perlvar{'lonUserLoadLim'};
465: if ($maxuserload) {
466: $userloadpercent=100*$numusers/$maxuserload;
467: }
468: $userloadpercent=sprintf("%.2f",$userloadpercent);
469: return $userloadpercent;
470: }
471:
472: # ------------------------------------------ Fight off request when overloaded
473:
474: sub overloaderror {
475: my ($r,$checkserver)=@_;
476: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
477: my $loadavg;
478: if ($checkserver eq $perlvar{'lonHostID'}) {
479: open(my $loadfile,'/proc/loadavg');
480: $loadavg=<$loadfile>;
481: $loadavg =~ s/\s.*//g;
482: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
483: close($loadfile);
484: } else {
485: $loadavg=&reply('load',$checkserver);
486: }
487: my $overload=$loadavg-100;
488: if ($overload>0) {
489: $r->err_headers_out->{'Retry-After'}=$overload;
490: $r->log_error('Overload of '.$overload.' on '.$checkserver);
491: return 413;
492: }
493: return '';
494: }
495:
496: # ------------------------------ Find server with least workload from spare.tab
497:
498: sub spareserver {
499: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
500: my $spare_server;
501: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
502: my $lowest_load=($loadpercent > $userloadpercent) ? $loadpercent
503: : $userloadpercent;
504:
505: foreach my $try_server (@{ $spareid{'primary'} }) {
506: ($spare_server, $lowest_load) =
507: &compare_server_load($try_server, $spare_server, $lowest_load);
508: }
509:
510: my $found_server = ($spare_server ne '' && $lowest_load < 100);
511:
512: if (!$found_server) {
513: foreach my $try_server (@{ $spareid{'default'} }) {
514: ($spare_server, $lowest_load) =
515: &compare_server_load($try_server, $spare_server, $lowest_load);
516: }
517: }
518:
519: if (!$want_server_name) {
520: $spare_server="http://".&hostname($spare_server);
521: }
522: return $spare_server;
523: }
524:
525: sub compare_server_load {
526: my ($try_server, $spare_server, $lowest_load) = @_;
527:
528: my $loadans = &reply('load', $try_server);
529: my $userloadans = &reply('userload',$try_server);
530:
531: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
532: next; #didn't get a number from the server
533: }
534:
535: my $load;
536: if ($loadans =~ /\d/) {
537: if ($userloadans =~ /\d/) {
538: #both are numbers, pick the bigger one
539: $load = ($loadans > $userloadans) ? $loadans
540: : $userloadans;
541: } else {
542: $load = $loadans;
543: }
544: } else {
545: $load = $userloadans;
546: }
547:
548: if (($load =~ /\d/) && ($load < $lowest_load)) {
549: $spare_server = $try_server;
550: $lowest_load = $load;
551: }
552: return ($spare_server,$lowest_load);
553: }
554: # --------------------------------------------- Try to change a user's password
555:
556: sub changepass {
557: my ($uname,$udom,$currentpass,$newpass,$server,$context)=@_;
558: $currentpass = &escape($currentpass);
559: $newpass = &escape($newpass);
560: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass:$context",
561: $server);
562: if (! $answer) {
563: &logthis("No reply on password change request to $server ".
564: "by $uname in domain $udom.");
565: } elsif ($answer =~ "^ok") {
566: &logthis("$uname in $udom successfully changed their password ".
567: "on $server.");
568: } elsif ($answer =~ "^pwchange_failure") {
569: &logthis("$uname in $udom was unable to change their password ".
570: "on $server. The action was blocked by either lcpasswd ".
571: "or pwchange");
572: } elsif ($answer =~ "^non_authorized") {
573: &logthis("$uname in $udom did not get their password correct when ".
574: "attempting to change it on $server.");
575: } elsif ($answer =~ "^auth_mode_error") {
576: &logthis("$uname in $udom attempted to change their password despite ".
577: "not being locally or internally authenticated on $server.");
578: } elsif ($answer =~ "^unknown_user") {
579: &logthis("$uname in $udom attempted to change their password ".
580: "on $server but were unable to because $server is not ".
581: "their home server.");
582: } elsif ($answer =~ "^refused") {
583: &logthis("$server refused to change $uname in $udom password because ".
584: "it was sent an unencrypted request to change the password.");
585: }
586: return $answer;
587: }
588:
589: # ----------------------- Try to determine user's current authentication scheme
590:
591: sub queryauthenticate {
592: my ($uname,$udom)=@_;
593: my $uhome=&homeserver($uname,$udom);
594: if (!$uhome) {
595: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
596: return 'no_host';
597: }
598: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
599: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
600: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
601: }
602: return $answer;
603: }
604:
605: # --------- Try to authenticate user from domain's lib servers (first this one)
606:
607: sub authenticate {
608: my ($uname,$upass,$udom)=@_;
609: $upass=&escape($upass);
610: $uname= &LONCAPA::clean_username($uname);
611: my $uhome=&homeserver($uname,$udom,1);
612: if ((!$uhome) || ($uhome eq 'no_host')) {
613: # Maybe the machine was offline and only re-appeared again recently?
614: &reconlonc();
615: # One more
616: my $uhome=&homeserver($uname,$udom,1);
617: if ((!$uhome) || ($uhome eq 'no_host')) {
618: &logthis("User $uname at $udom is unknown in authenticate");
619: }
620: return 'no_host';
621: }
622: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
623: if ($answer eq 'authorized') {
624: &logthis("User $uname at $udom authorized by $uhome");
625: return $uhome;
626: }
627: if ($answer eq 'non_authorized') {
628: &logthis("User $uname at $udom rejected by $uhome");
629: return 'no_host';
630: }
631: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
632: return 'no_host';
633: }
634:
635: # ---------------------- Find the homebase for a user from domain's lib servers
636:
637: my %homecache;
638: sub homeserver {
639: my ($uname,$udom,$ignoreBadCache)=@_;
640: my $index="$uname:$udom";
641:
642: if (exists($homecache{$index})) { return $homecache{$index}; }
643: my $tryserver;
644: foreach $tryserver (keys %libserv) {
645: next if ($ignoreBadCache ne 'true' &&
646: exists($badServerCache{$tryserver}));
647: if ($hostdom{$tryserver} eq $udom) {
648: my $answer=reply("home:$udom:$uname",$tryserver);
649: if ($answer eq 'found') {
650: delete($badServerCache{$tryserver});
651: return $homecache{$index}=$tryserver;
652: } elsif ($answer eq 'no_host') {
653: $badServerCache{$tryserver}=1;
654: }
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 $tryserver;
667: foreach $tryserver (keys %libserv) {
668: if ($hostdom{$tryserver} eq $udom) {
669: my $idlist=join('&',@ids);
670: $idlist=~tr/A-Z/a-z/;
671: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
672: my @answer=();
673: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
674: @answer=split(/\&/,$reply);
675: } ;
676: my $i;
677: for ($i=0;$i<=$#ids;$i++) {
678: if ($answer[$i]) {
679: $returnhash{$ids[$i]}=$answer[$i];
680: }
681: }
682: }
683: }
684: return %returnhash;
685: }
686:
687: # ------------------------------------- Find the IDs behind a list of usernames
688:
689: sub idrget {
690: my ($udom,@unames)=@_;
691: my %returnhash=();
692: foreach my $uname (@unames) {
693: $returnhash{$uname}=(&userenvironment($udom,$uname,'id'))[1];
694: }
695: return %returnhash;
696: }
697:
698: # ------------------------------- Store away a list of names and associated IDs
699:
700: sub idput {
701: my ($udom,%ids)=@_;
702: my %servers=();
703: foreach my $uname (keys(%ids)) {
704: &cput('environment',{'id'=>$ids{$uname}},$udom,$uname);
705: my $uhom=&homeserver($uname,$udom);
706: if ($uhom ne 'no_host') {
707: my $id=&escape($ids{$uname});
708: $id=~tr/A-Z/a-z/;
709: my $esc_unam=&escape($uname);
710: if ($servers{$uhom}) {
711: $servers{$uhom}.='&'.$id.'='.$esc_unam;
712: } else {
713: $servers{$uhom}=$id.'='.$esc_unam;
714: }
715: }
716: }
717: foreach my $server (keys(%servers)) {
718: &critical('idput:'.$udom.':'.$servers{$server},$server);
719: }
720: }
721:
722: # ------------------------------------------- get items from domain db files
723:
724: sub get_dom {
725: my ($namespace,$storearr,$udom)=@_;
726: my $items='';
727: foreach my $item (@$storearr) {
728: $items.=&escape($item).'&';
729: }
730: $items=~s/\&$//;
731: if (!$udom) { $udom=$env{'user.domain'}; }
732: if (exists($domain_primary{$udom})) {
733: my $uhome=$domain_primary{$udom};
734: my $rep=&reply("getdom:$udom:$namespace:$items",$uhome);
735: my @pairs=split(/\&/,$rep);
736: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
737: return @pairs;
738: }
739: my %returnhash=();
740: my $i=0;
741: foreach my $item (@$storearr) {
742: $returnhash{$item}=&thaw_unescape($pairs[$i]);
743: $i++;
744: }
745: return %returnhash;
746: } else {
747: &logthis("get_dom failed - no primary domain server for $udom");
748: }
749: }
750:
751: # -------------------------------------------- put items in domain db files
752:
753: sub put_dom {
754: my ($namespace,$storehash,$udom)=@_;
755: if (!$udom) { $udom=$env{'user.domain'}; }
756: if (exists($domain_primary{$udom})) {
757: my $uhome=$domain_primary{$udom};
758: my $items='';
759: foreach my $item (keys(%$storehash)) {
760: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
761: }
762: $items=~s/\&$//;
763: return &reply("putdom:$udom:$namespace:$items",$uhome);
764: } else {
765: &logthis("put_dom failed - no primary domain server for $udom");
766: }
767: }
768:
769: sub retrieve_inst_usertypes {
770: my ($udom) = @_;
771: my (%returnhash,@order);
772: if (exists($domain_primary{$udom})) {
773: my $uhome=$domain_primary{$udom};
774: my $rep=&reply("inst_usertypes:$udom",$uhome);
775: my ($hashitems,$orderitems) = split(/:/,$rep);
776: my @pairs=split(/\&/,$hashitems);
777: foreach my $item (@pairs) {
778: my ($key,$value)=split(/=/,$item,2);
779: $key = &unescape($key);
780: next if ($key =~ /^error: 2 /);
781: $returnhash{$key}=&thaw_unescape($value);
782: }
783: my @esc_order = split(/\&/,$orderitems);
784: foreach my $item (@esc_order) {
785: push(@order,&unescape($item));
786: }
787: } else {
788: &logthis("get_dom failed - no primary domain server for $udom");
789: }
790: return (\%returnhash,\@order);
791: }
792:
793: # --------------------------------------------------- Assign a key to a student
794:
795: sub assign_access_key {
796: #
797: # a valid key looks like uname:udom#comments
798: # comments are being appended
799: #
800: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
801: $kdom=
802: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
803: $knum=
804: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
805: $cdom=
806: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
807: $cnum=
808: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
809: $udom=$env{'user.name'} unless (defined($udom));
810: $uname=$env{'user.domain'} unless (defined($uname));
811: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
812: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
813: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
814: # assigned to this person
815: # - this should not happen,
816: # unless something went wrong
817: # the first time around
818: # ready to assign
819: $logentry=$1.'; '.$logentry;
820: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
821: $kdom,$knum) eq 'ok') {
822: # key now belongs to user
823: my $envkey='key.'.$cdom.'_'.$cnum;
824: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
825: &appenv('environment.'.$envkey => $ckey);
826: return 'ok';
827: } else {
828: return
829: 'error: Count not permanently assign key, will need to be re-entered later.';
830: }
831: } else {
832: return 'error: Could not assign key, try again later.';
833: }
834: } elsif (!$existing{$ckey}) {
835: # the key does not exist
836: return 'error: The key does not exist';
837: } else {
838: # the key is somebody else's
839: return 'error: The key is already in use';
840: }
841: }
842:
843: # ------------------------------------------ put an additional comment on a key
844:
845: sub comment_access_key {
846: #
847: # a valid key looks like uname:udom#comments
848: # comments are being appended
849: #
850: my ($ckey,$cdom,$cnum,$logentry)=@_;
851: $cdom=
852: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
853: $cnum=
854: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
855: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
856: if ($existing{$ckey}) {
857: $existing{$ckey}.='; '.$logentry;
858: # ready to assign
859: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
860: $cdom,$cnum) eq 'ok') {
861: return 'ok';
862: } else {
863: return 'error: Count not store comment.';
864: }
865: } else {
866: # the key does not exist
867: return 'error: The key does not exist';
868: }
869: }
870:
871: # ------------------------------------------------------ Generate a set of keys
872:
873: sub generate_access_keys {
874: my ($number,$cdom,$cnum,$logentry)=@_;
875: $cdom=
876: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
877: $cnum=
878: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
879: unless (&allowed('mky',$cdom)) { return 0; }
880: unless (($cdom) && ($cnum)) { return 0; }
881: if ($number>10000) { return 0; }
882: sleep(2); # make sure don't get same seed twice
883: srand(time()^($$+($$<<15))); # from "Programming Perl"
884: my $total=0;
885: for (my $i=1;$i<=$number;$i++) {
886: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
887: sprintf("%lx",int(100000*rand)).'-'.
888: sprintf("%lx",int(100000*rand));
889: $newkey=~s/1/g/g; # folks mix up 1 and l
890: $newkey=~s/0/h/g; # and also 0 and O
891: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
892: if ($existing{$newkey}) {
893: $i--;
894: } else {
895: if (&put('accesskeys',
896: { $newkey => '# generated '.localtime().
897: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
898: '; '.$logentry },
899: $cdom,$cnum) eq 'ok') {
900: $total++;
901: }
902: }
903: }
904: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
905: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
906: return $total;
907: }
908:
909: # ------------------------------------------------------- Validate an accesskey
910:
911: sub validate_access_key {
912: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
913: $cdom=
914: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
915: $cnum=
916: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
917: $udom=$env{'user.domain'} unless (defined($udom));
918: $uname=$env{'user.name'} unless (defined($uname));
919: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
920: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
921: }
922:
923: # ------------------------------------- Find the section of student in a course
924: sub devalidate_getsection_cache {
925: my ($udom,$unam,$courseid)=@_;
926: my $hashid="$udom:$unam:$courseid";
927: &devalidate_cache_new('getsection',$hashid);
928: }
929:
930: sub courseid_to_courseurl {
931: my ($courseid) = @_;
932: #already url style courseid
933: return $courseid if ($courseid =~ m{^/});
934:
935: if (exists($env{'course.'.$courseid.'.num'})) {
936: my $cnum = $env{'course.'.$courseid.'.num'};
937: my $cdom = $env{'course.'.$courseid.'.domain'};
938: return "/$cdom/$cnum";
939: }
940:
941: my %courseinfo=&Apache::lonnet::coursedescription($courseid);
942: if (exists($courseinfo{'num'})) {
943: return "/$courseinfo{'domain'}/$courseinfo{'num'}";
944: }
945:
946: return undef;
947: }
948:
949: sub getsection {
950: my ($udom,$unam,$courseid)=@_;
951: my $cachetime=1800;
952:
953: my $hashid="$udom:$unam:$courseid";
954: my ($result,$cached)=&is_cached_new('getsection',$hashid);
955: if (defined($cached)) { return $result; }
956:
957: my %Pending;
958: my %Expired;
959: #
960: # Each role can either have not started yet (pending), be active,
961: # or have expired.
962: #
963: # If there is an active role, we are done.
964: #
965: # If there is more than one role which has not started yet,
966: # choose the one which will start sooner
967: # If there is one role which has not started yet, return it.
968: #
969: # If there is more than one expired role, choose the one which ended last.
970: # If there is a role which has expired, return it.
971: #
972: $courseid = &courseid_to_courseurl($courseid);
973: my %roleshash = &dump('roles',$udom,$unam,$courseid);
974: foreach my $key (keys(%roleshash)) {
975: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
976: my $section=$1;
977: if ($key eq $courseid.'_st') { $section=''; }
978: my ($dummy,$end,$start)=split(/\_/,&unescape($roleshash{$key}));
979: my $now=time;
980: if (defined($end) && $end && ($now > $end)) {
981: $Expired{$end}=$section;
982: next;
983: }
984: if (defined($start) && $start && ($now < $start)) {
985: $Pending{$start}=$section;
986: next;
987: }
988: return &do_cache_new('getsection',$hashid,$section,$cachetime);
989: }
990: #
991: # Presumedly there will be few matching roles from the above
992: # loop and the sorting time will be negligible.
993: if (scalar(keys(%Pending))) {
994: my ($time) = sort {$a <=> $b} keys(%Pending);
995: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
996: }
997: if (scalar(keys(%Expired))) {
998: my @sorted = sort {$a <=> $b} keys(%Expired);
999: my $time = pop(@sorted);
1000: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
1001: }
1002: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
1003: }
1004:
1005: sub save_cache {
1006: &purge_remembered();
1007: #&Apache::loncommon::validate_page();
1008: undef(%env);
1009: undef($env_loaded);
1010: }
1011:
1012: my $to_remember=-1;
1013: my %remembered;
1014: my %accessed;
1015: my $kicks=0;
1016: my $hits=0;
1017: sub devalidate_cache_new {
1018: my ($name,$id,$debug) = @_;
1019: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
1020: $id=&escape($name.':'.$id);
1021: $memcache->delete($id);
1022: delete($remembered{$id});
1023: delete($accessed{$id});
1024: }
1025:
1026: sub is_cached_new {
1027: my ($name,$id,$debug) = @_;
1028: $id=&escape($name.':'.$id);
1029: if (exists($remembered{$id})) {
1030: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
1031: $accessed{$id}=[&gettimeofday()];
1032: $hits++;
1033: return ($remembered{$id},1);
1034: }
1035: my $value = $memcache->get($id);
1036: if (!(defined($value))) {
1037: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
1038: return (undef,undef);
1039: }
1040: if ($value eq '__undef__') {
1041: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
1042: $value=undef;
1043: }
1044: &make_room($id,$value,$debug);
1045: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
1046: return ($value,1);
1047: }
1048:
1049: sub do_cache_new {
1050: my ($name,$id,$value,$time,$debug) = @_;
1051: $id=&escape($name.':'.$id);
1052: my $setvalue=$value;
1053: if (!defined($setvalue)) {
1054: $setvalue='__undef__';
1055: }
1056: if (!defined($time) ) {
1057: $time=600;
1058: }
1059: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
1060: $memcache->set($id,$setvalue,$time);
1061: # need to make a copy of $value
1062: #&make_room($id,$value,$debug);
1063: return $value;
1064: }
1065:
1066: sub make_room {
1067: my ($id,$value,$debug)=@_;
1068: $remembered{$id}=$value;
1069: if ($to_remember<0) { return; }
1070: $accessed{$id}=[&gettimeofday()];
1071: if (scalar(keys(%remembered)) <= $to_remember) { return; }
1072: my $to_kick;
1073: my $max_time=0;
1074: foreach my $other (keys(%accessed)) {
1075: if (&tv_interval($accessed{$other}) > $max_time) {
1076: $to_kick=$other;
1077: $max_time=&tv_interval($accessed{$other});
1078: }
1079: }
1080: delete($remembered{$to_kick});
1081: delete($accessed{$to_kick});
1082: $kicks++;
1083: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
1084: return;
1085: }
1086:
1087: sub purge_remembered {
1088: #&logthis("Tossing ".scalar(keys(%remembered)));
1089: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
1090: undef(%remembered);
1091: undef(%accessed);
1092: }
1093: # ------------------------------------- Read an entry from a user's environment
1094:
1095: sub userenvironment {
1096: my ($udom,$unam,@what)=@_;
1097: my %returnhash=();
1098: my @answer=split(/\&/,
1099: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1100: &homeserver($unam,$udom)));
1101: my $i;
1102: for ($i=0;$i<=$#what;$i++) {
1103: $returnhash{$what[$i]}=&unescape($answer[$i]);
1104: }
1105: return %returnhash;
1106: }
1107:
1108: # ---------------------------------------------------------- Get a studentphoto
1109: sub studentphoto {
1110: my ($udom,$unam,$ext) = @_;
1111: my $home=&Apache::lonnet::homeserver($unam,$udom);
1112: if (defined($env{'request.course.id'})) {
1113: if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
1114: if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
1115: return(&retrievestudentphoto($udom,$unam,$ext));
1116: } else {
1117: my ($result,$perm_reqd)=
1118: &Apache::lonnet::auto_photo_permission($unam,$udom);
1119: if ($result eq 'ok') {
1120: if (!($perm_reqd eq 'yes')) {
1121: return(&retrievestudentphoto($udom,$unam,$ext));
1122: }
1123: }
1124: }
1125: }
1126: } else {
1127: my ($result,$perm_reqd) =
1128: &Apache::lonnet::auto_photo_permission($unam,$udom);
1129: if ($result eq 'ok') {
1130: if (!($perm_reqd eq 'yes')) {
1131: return(&retrievestudentphoto($udom,$unam,$ext));
1132: }
1133: }
1134: }
1135: return '/adm/lonKaputt/lonlogo_broken.gif';
1136: }
1137:
1138: sub retrievestudentphoto {
1139: my ($udom,$unam,$ext,$type) = @_;
1140: my $home=&Apache::lonnet::homeserver($unam,$udom);
1141: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
1142: if ($ret eq 'ok') {
1143: my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
1144: if ($type eq 'thumbnail') {
1145: $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
1146: }
1147: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
1148: return $tokenurl;
1149: } else {
1150: if ($type eq 'thumbnail') {
1151: return '/adm/lonKaputt/genericstudent_tn.gif';
1152: } else {
1153: return '/adm/lonKaputt/lonlogo_broken.gif';
1154: }
1155: }
1156: }
1157:
1158: # -------------------------------------------------------------------- New chat
1159:
1160: sub chatsend {
1161: my ($newentry,$anon,$group)=@_;
1162: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1163: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1164: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1165: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1166: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
1167: &escape($newentry)).':'.$group,$chome);
1168: }
1169:
1170: # ------------------------------------------ Find current version of a resource
1171:
1172: sub getversion {
1173: my $fname=&clutter(shift);
1174: unless ($fname=~/^\/res\//) { return -1; }
1175: return ¤tversion(&filelocation('',$fname));
1176: }
1177:
1178: sub currentversion {
1179: my $fname=shift;
1180: my ($result,$cached)=&is_cached_new('resversion',$fname);
1181: if (defined($cached)) { return $result; }
1182: my $author=$fname;
1183: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1184: my ($udom,$uname)=split(/\//,$author);
1185: my $home=homeserver($uname,$udom);
1186: if ($home eq 'no_host') {
1187: return -1;
1188: }
1189: my $answer=reply("currentversion:$fname",$home);
1190: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1191: return -1;
1192: }
1193: return &do_cache_new('resversion',$fname,$answer,600);
1194: }
1195:
1196: # ----------------------------- Subscribe to a resource, return URL if possible
1197:
1198: sub subscribe {
1199: my $fname=shift;
1200: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1201: $fname=~s/[\n\r]//g;
1202: my $author=$fname;
1203: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1204: my ($udom,$uname)=split(/\//,$author);
1205: my $home=homeserver($uname,$udom);
1206: if ($home eq 'no_host') {
1207: return 'not_found';
1208: }
1209: my $answer=reply("sub:$fname",$home);
1210: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1211: $answer.=' by '.$home;
1212: }
1213: return $answer;
1214: }
1215:
1216: # -------------------------------------------------------------- Replicate file
1217:
1218: sub repcopy {
1219: my $filename=shift;
1220: $filename=~s/\/+/\//g;
1221: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1222: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1223: if ($filename=~m|^/home/httpd/html/userfiles/| or
1224: $filename=~m -^/*(uploaded|editupload)/-) {
1225: return &repcopy_userfile($filename);
1226: }
1227: $filename=~s/[\n\r]//g;
1228: my $transname="$filename.in.transfer";
1229: # FIXME: this should flock
1230: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1231: my $remoteurl=subscribe($filename);
1232: if ($remoteurl =~ /^con_lost by/) {
1233: &logthis("Subscribe returned $remoteurl: $filename");
1234: return 'unavailable';
1235: } elsif ($remoteurl eq 'not_found') {
1236: #&logthis("Subscribe returned not_found: $filename");
1237: return 'not_found';
1238: } elsif ($remoteurl =~ /^rejected by/) {
1239: &logthis("Subscribe returned $remoteurl: $filename");
1240: return 'forbidden';
1241: } elsif ($remoteurl eq 'directory') {
1242: return 'ok';
1243: } else {
1244: my $author=$filename;
1245: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1246: my ($udom,$uname)=split(/\//,$author);
1247: my $home=homeserver($uname,$udom);
1248: unless ($home eq $perlvar{'lonHostID'}) {
1249: my @parts=split(/\//,$filename);
1250: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1251: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1252: &logthis("Malconfiguration for replication: $filename");
1253: return 'bad_request';
1254: }
1255: my $count;
1256: for ($count=5;$count<$#parts;$count++) {
1257: $path.="/$parts[$count]";
1258: if ((-e $path)!=1) {
1259: mkdir($path,0777);
1260: }
1261: }
1262: my $ua=new LWP::UserAgent;
1263: my $request=new HTTP::Request('GET',"$remoteurl");
1264: my $response=$ua->request($request,$transname);
1265: if ($response->is_error()) {
1266: unlink($transname);
1267: my $message=$response->status_line;
1268: &logthis("<font color=\"blue\">WARNING:"
1269: ." LWP get: $message: $filename</font>");
1270: return 'unavailable';
1271: } else {
1272: if ($remoteurl!~/\.meta$/) {
1273: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1274: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1275: if ($mresponse->is_error()) {
1276: unlink($filename.'.meta');
1277: &logthis(
1278: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1279: }
1280: }
1281: rename($transname,$filename);
1282: return 'ok';
1283: }
1284: }
1285: }
1286: }
1287:
1288: # ------------------------------------------------ Get server side include body
1289: sub ssi_body {
1290: my ($filelink,%form)=@_;
1291: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1292: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1293: }
1294: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1295: &ssi($filelink,%form));
1296: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
1297: $output=~s/^.*?\<body[^\>]*\>//si;
1298: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1299: return $output;
1300: }
1301:
1302: # --------------------------------------------------------- Server Side Include
1303:
1304: sub absolute_url {
1305: my ($host_name) = @_;
1306: my $protocol = ($ENV{'SERVER_PORT'} == 443?'https://':'http://');
1307: if ($host_name eq '') {
1308: $host_name = $ENV{'SERVER_NAME'};
1309: }
1310: return $protocol.$host_name;
1311: }
1312:
1313: sub ssi {
1314:
1315: my ($fn,%form)=@_;
1316:
1317: my $ua=new LWP::UserAgent;
1318:
1319: my $request;
1320:
1321: $form{'no_update_last_known'}=1;
1322:
1323: if (%form) {
1324: $request=new HTTP::Request('POST',&absolute_url().$fn);
1325: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1326: } else {
1327: $request=new HTTP::Request('GET',&absolute_url().$fn);
1328: }
1329:
1330: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1331: my $response=$ua->request($request);
1332:
1333: return $response->content;
1334: }
1335:
1336: sub externalssi {
1337: my ($url)=@_;
1338: my $ua=new LWP::UserAgent;
1339: my $request=new HTTP::Request('GET',$url);
1340: my $response=$ua->request($request);
1341: return $response->content;
1342: }
1343:
1344: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1345:
1346: sub allowuploaded {
1347: my ($srcurl,$url)=@_;
1348: $url=&clutter(&declutter($url));
1349: my $dir=$url;
1350: $dir=~s/\/[^\/]+$//;
1351: my %httpref=();
1352: my $httpurl=&hreflocation('',$url);
1353: $httpref{'httpref.'.$httpurl}=$srcurl;
1354: &Apache::lonnet::appenv(%httpref);
1355: }
1356:
1357: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1358: # input: action, courseID, current domain, intended
1359: # path to file, source of file, instruction to parse file for objects,
1360: # ref to hash for embedded objects,
1361: # ref to hash for codebase of java objects.
1362: #
1363: # output: url to file (if action was uploaddoc),
1364: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1365: #
1366: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1367: # course.
1368: #
1369: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1370: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1371: # course's home server.
1372: #
1373: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1374: # be copied from $source (current location) to
1375: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1376: # and will then be copied to
1377: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1378: # course's home server.
1379: #
1380: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1381: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1382: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1383: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1384: # in course's home server.
1385: #
1386:
1387: sub process_coursefile {
1388: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1389: my $fetchresult;
1390: my $home=&homeserver($docuname,$docudom);
1391: if ($action eq 'propagate') {
1392: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1393: $home);
1394: } else {
1395: my $fpath = '';
1396: my $fname = $file;
1397: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1398: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1399: my $filepath = &build_filepath($fpath);
1400: if ($action eq 'copy') {
1401: if ($source eq '') {
1402: $fetchresult = 'no source file';
1403: return $fetchresult;
1404: } else {
1405: my $destination = $filepath.'/'.$fname;
1406: rename($source,$destination);
1407: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1408: $home);
1409: }
1410: } elsif ($action eq 'uploaddoc') {
1411: open(my $fh,'>'.$filepath.'/'.$fname);
1412: print $fh $env{'form.'.$source};
1413: close($fh);
1414: if ($parser eq 'parse') {
1415: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1416: unless ($parse_result eq 'ok') {
1417: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1418: }
1419: }
1420: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1421: $home);
1422: if ($fetchresult eq 'ok') {
1423: return '/uploaded/'.$fpath.'/'.$fname;
1424: } else {
1425: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1426: ' to host '.$home.': '.$fetchresult);
1427: return '/adm/notfound.html';
1428: }
1429: }
1430: }
1431: unless ( $fetchresult eq 'ok') {
1432: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1433: ' to host '.$home.': '.$fetchresult);
1434: }
1435: return $fetchresult;
1436: }
1437:
1438: sub build_filepath {
1439: my ($fpath) = @_;
1440: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1441: unless ($fpath eq '') {
1442: my @parts=split('/',$fpath);
1443: foreach my $part (@parts) {
1444: $filepath.= '/'.$part;
1445: if ((-e $filepath)!=1) {
1446: mkdir($filepath,0777);
1447: }
1448: }
1449: }
1450: return $filepath;
1451: }
1452:
1453: sub store_edited_file {
1454: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1455: my $file = $primary_url;
1456: $file =~ s#^/uploaded/$docudom/$docuname/##;
1457: my $fpath = '';
1458: my $fname = $file;
1459: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1460: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1461: my $filepath = &build_filepath($fpath);
1462: open(my $fh,'>'.$filepath.'/'.$fname);
1463: print $fh $content;
1464: close($fh);
1465: my $home=&homeserver($docuname,$docudom);
1466: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1467: $home);
1468: if ($$fetchresult eq 'ok') {
1469: return '/uploaded/'.$fpath.'/'.$fname;
1470: } else {
1471: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1472: ' to host '.$home.': '.$$fetchresult);
1473: return '/adm/notfound.html';
1474: }
1475: }
1476:
1477: sub clean_filename {
1478: my ($fname,$args)=@_;
1479: # Replace Windows backslashes by forward slashes
1480: $fname=~s/\\/\//g;
1481: if (!$args->{'keep_path'}) {
1482: # Get rid of everything but the actual filename
1483: $fname=~s/^.*\/([^\/]+)$/$1/;
1484: }
1485: # Replace spaces by underscores
1486: $fname=~s/\s+/\_/g;
1487: # Replace all other weird characters by nothing
1488: $fname=~s{[^/\w\.\-]}{}g;
1489: # Replace all .\d. sequences with _\d. so they no longer look like version
1490: # numbers
1491: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1492: return $fname;
1493: }
1494:
1495: # --------------- Take an uploaded file and put it into the userfiles directory
1496: # input: $formname - the contents of the file are in $env{"form.$formname"}
1497: # the desired filenam is in $env{"form.$formname.filename"}
1498: # $coursedoc - if true up to the current course
1499: # if false
1500: # $subdir - directory in userfile to store the file into
1501: # $parser, $allfiles, $codebase - unknown
1502: #
1503: # output: url of file in userspace, or error: <message>
1504: # or /adm/notfound.html if failure to upload occurse
1505:
1506:
1507: sub userfileupload {
1508: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,$destudom)=@_;
1509: if (!defined($subdir)) { $subdir='unknown'; }
1510: my $fname=$env{'form.'.$formname.'.filename'};
1511: $fname=&clean_filename($fname);
1512: # See if there is anything left
1513: unless ($fname) { return 'error: no uploaded file'; }
1514: chop($env{'form.'.$formname});
1515: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1516: my $now = time;
1517: my $filepath = 'tmp/helprequests/'.$now;
1518: my @parts=split(/\//,$filepath);
1519: my $fullpath = $perlvar{'lonDaemons'};
1520: for (my $i=0;$i<@parts;$i++) {
1521: $fullpath .= '/'.$parts[$i];
1522: if ((-e $fullpath)!=1) {
1523: mkdir($fullpath,0777);
1524: }
1525: }
1526: open(my $fh,'>'.$fullpath.'/'.$fname);
1527: print $fh $env{'form.'.$formname};
1528: close($fh);
1529: return $fullpath.'/'.$fname;
1530: } elsif (($formname eq 'coursecreatorxml') && ($subdir eq 'batchupload')) { #files uploaded to create course page are handled differently
1531: my $filepath = 'tmp/addcourse/'.$destudom.'/web/'.$env{'user.name'}.
1532: '_'.$env{'user.domain'}.'/pending';
1533: my @parts=split(/\//,$filepath);
1534: my $fullpath = $perlvar{'lonDaemons'};
1535: for (my $i=0;$i<@parts;$i++) {
1536: $fullpath .= '/'.$parts[$i];
1537: if ((-e $fullpath)!=1) {
1538: mkdir($fullpath,0777);
1539: }
1540: }
1541: open(my $fh,'>'.$fullpath.'/'.$fname);
1542: print $fh $env{'form.'.$formname};
1543: close($fh);
1544: return $fullpath.'/'.$fname;
1545: }
1546:
1547: # Create the directory if not present
1548: $fname="$subdir/$fname";
1549: if ($coursedoc) {
1550: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1551: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1552: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1553: return &finishuserfileupload($docuname,$docudom,
1554: $formname,$fname,$parser,$allfiles,
1555: $codebase);
1556: } else {
1557: $fname=$env{'form.folder'}.'/'.$fname;
1558: return &process_coursefile('uploaddoc',$docuname,$docudom,
1559: $fname,$formname,$parser,
1560: $allfiles,$codebase);
1561: }
1562: } elsif (defined($destuname)) {
1563: my $docuname=$destuname;
1564: my $docudom=$destudom;
1565: return &finishuserfileupload($docuname,$docudom,$formname,
1566: $fname,$parser,$allfiles,$codebase);
1567:
1568: } else {
1569: my $docuname=$env{'user.name'};
1570: my $docudom=$env{'user.domain'};
1571: if (exists($env{'form.group'})) {
1572: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1573: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1574: }
1575: return &finishuserfileupload($docuname,$docudom,$formname,
1576: $fname,$parser,$allfiles,$codebase);
1577: }
1578: }
1579:
1580: sub finishuserfileupload {
1581: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
1582: my $path=$docudom.'/'.$docuname.'/';
1583: my $filepath=$perlvar{'lonDocRoot'};
1584: my ($fnamepath,$file);
1585: $file=$fname;
1586: if ($fname=~m|/|) {
1587: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1588: $path.=$fnamepath.'/';
1589: }
1590: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1591: my $count;
1592: for ($count=4;$count<=$#parts;$count++) {
1593: $filepath.="/$parts[$count]";
1594: if ((-e $filepath)!=1) {
1595: mkdir($filepath,0777);
1596: }
1597: }
1598: # Save the file
1599: {
1600: if (!open(FH,'>'.$filepath.'/'.$file)) {
1601: &logthis('Failed to create '.$filepath.'/'.$file);
1602: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1603: return '/adm/notfound.html';
1604: }
1605: if (!print FH ($env{'form.'.$formname})) {
1606: &logthis('Failed to write to '.$filepath.'/'.$file);
1607: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1608: return '/adm/notfound.html';
1609: }
1610: close(FH);
1611: }
1612: if ($parser eq 'parse') {
1613: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1614: $codebase);
1615: unless ($parse_result eq 'ok') {
1616: &logthis('Failed to parse '.$filepath.$file.
1617: ' for embedded media: '.$parse_result);
1618: }
1619: }
1620: # Notify homeserver to grep it
1621: #
1622: my $docuhome=&homeserver($docuname,$docudom);
1623: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1624: if ($fetchresult eq 'ok') {
1625: #
1626: # Return the URL to it
1627: return '/uploaded/'.$path.$file;
1628: } else {
1629: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1630: ': '.$fetchresult);
1631: return '/adm/notfound.html';
1632: }
1633: }
1634:
1635: sub extract_embedded_items {
1636: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1637: my @state = ();
1638: my %javafiles = (
1639: codebase => '',
1640: code => '',
1641: archive => ''
1642: );
1643: my %mediafiles = (
1644: src => '',
1645: movie => '',
1646: );
1647: my $p;
1648: if ($content) {
1649: $p = HTML::LCParser->new($content);
1650: } else {
1651: $p = HTML::LCParser->new($filepath.'/'.$file);
1652: }
1653: while (my $t=$p->get_token()) {
1654: if ($t->[0] eq 'S') {
1655: my ($tagname, $attr) = ($t->[1],$t->[2]);
1656: push (@state, $tagname);
1657: if (lc($tagname) eq 'allow') {
1658: &add_filetype($allfiles,$attr->{'src'},'src');
1659: }
1660: if (lc($tagname) eq 'img') {
1661: &add_filetype($allfiles,$attr->{'src'},'src');
1662: }
1663: if (lc($tagname) eq 'script') {
1664: if ($attr->{'archive'} =~ /\.jar$/i) {
1665: &add_filetype($allfiles,$attr->{'archive'},'archive');
1666: } else {
1667: &add_filetype($allfiles,$attr->{'src'},'src');
1668: }
1669: }
1670: if (lc($tagname) eq 'link') {
1671: if (lc($attr->{'rel'}) eq 'stylesheet') {
1672: &add_filetype($allfiles,$attr->{'href'},'href');
1673: }
1674: }
1675: if (lc($tagname) eq 'object' ||
1676: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1677: foreach my $item (keys(%javafiles)) {
1678: $javafiles{$item} = '';
1679: }
1680: }
1681: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1682: my $name = lc($attr->{'name'});
1683: foreach my $item (keys(%javafiles)) {
1684: if ($name eq $item) {
1685: $javafiles{$item} = $attr->{'value'};
1686: last;
1687: }
1688: }
1689: foreach my $item (keys(%mediafiles)) {
1690: if ($name eq $item) {
1691: &add_filetype($allfiles, $attr->{'value'}, 'value');
1692: last;
1693: }
1694: }
1695: }
1696: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1697: foreach my $item (keys(%javafiles)) {
1698: if ($attr->{$item}) {
1699: $javafiles{$item} = $attr->{$item};
1700: last;
1701: }
1702: }
1703: foreach my $item (keys(%mediafiles)) {
1704: if ($attr->{$item}) {
1705: &add_filetype($allfiles,$attr->{$item},$item);
1706: last;
1707: }
1708: }
1709: }
1710: } elsif ($t->[0] eq 'E') {
1711: my ($tagname) = ($t->[1]);
1712: if ($javafiles{'codebase'} ne '') {
1713: $javafiles{'codebase'} .= '/';
1714: }
1715: if (lc($tagname) eq 'applet' ||
1716: lc($tagname) eq 'object' ||
1717: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1718: ) {
1719: foreach my $item (keys(%javafiles)) {
1720: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1721: my $file=$javafiles{'codebase'}.$javafiles{$item};
1722: &add_filetype($allfiles,$file,$item);
1723: }
1724: }
1725: }
1726: pop @state;
1727: }
1728: }
1729: return 'ok';
1730: }
1731:
1732: sub add_filetype {
1733: my ($allfiles,$file,$type)=@_;
1734: if (exists($allfiles->{$file})) {
1735: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1736: push(@{$allfiles->{$file}}, &escape($type));
1737: }
1738: } else {
1739: @{$allfiles->{$file}} = (&escape($type));
1740: }
1741: }
1742:
1743: sub removeuploadedurl {
1744: my ($url)=@_;
1745: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1746: return &removeuserfile($uname,$udom,$fname);
1747: }
1748:
1749: sub removeuserfile {
1750: my ($docuname,$docudom,$fname)=@_;
1751: my $home=&homeserver($docuname,$docudom);
1752: my $result = &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1753: if ($result eq 'ok') {
1754: if (($fname !~ /\.meta$/) && (&is_portfolio_file($fname))) {
1755: my $metafile = $fname.'.meta';
1756: my $metaresult = &removeuserfile($docuname,$docudom,$metafile);
1757: my $url = "/uploaded/$docudom/$docuname/$fname";
1758: my ($file,$group) = (&parse_portfolio_url($url))[3,4];
1759: my $sqlresult =
1760: &update_portfolio_table($docuname,$docudom,$file,
1761: 'portfolio_metadata',$group,
1762: 'delete');
1763: }
1764: }
1765: return $result;
1766: }
1767:
1768: sub mkdiruserfile {
1769: my ($docuname,$docudom,$dir)=@_;
1770: my $home=&homeserver($docuname,$docudom);
1771: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1772: }
1773:
1774: sub renameuserfile {
1775: my ($docuname,$docudom,$old,$new)=@_;
1776: my $home=&homeserver($docuname,$docudom);
1777: my $result = &reply("renameuserfile:$docudom:$docuname:".
1778: &escape("$old").':'.&escape("$new"),$home);
1779: if ($result eq 'ok') {
1780: if (($old !~ /\.meta$/) && (&is_portfolio_file($old))) {
1781: my $oldmeta = $old.'.meta';
1782: my $newmeta = $new.'.meta';
1783: my $metaresult =
1784: &renameuserfile($docuname,$docudom,$oldmeta,$newmeta);
1785: my $url = "/uploaded/$docudom/$docuname/$old";
1786: my ($file,$group) = (&parse_portfolio_url($url))[3,4];
1787: my $sqlresult =
1788: &update_portfolio_table($docuname,$docudom,$file,
1789: 'portfolio_metadata',$group,
1790: 'delete');
1791: }
1792: }
1793: return $result;
1794: }
1795:
1796: # ------------------------------------------------------------------------- Log
1797:
1798: sub log {
1799: my ($dom,$nam,$hom,$what)=@_;
1800: return critical("log:$dom:$nam:$what",$hom);
1801: }
1802:
1803: # ------------------------------------------------------------------ Course Log
1804: #
1805: # This routine flushes several buffers of non-mission-critical nature
1806: #
1807:
1808: sub flushcourselogs {
1809: &logthis('Flushing log buffers');
1810: #
1811: # course logs
1812: # This is a log of all transactions in a course, which can be used
1813: # for data mining purposes
1814: #
1815: # It also collects the courseid database, which lists last transaction
1816: # times and course titles for all courseids
1817: #
1818: my %courseidbuffer=();
1819: foreach my $crsid (keys %courselogs) {
1820: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1821: &escape($courselogs{$crsid}),
1822: $coursehombuf{$crsid}) eq 'ok') {
1823: delete $courselogs{$crsid};
1824: } else {
1825: &logthis('Failed to flush log buffer for '.$crsid);
1826: if (length($courselogs{$crsid})>40000) {
1827: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
1828: " exceeded maximum size, deleting.</font>");
1829: delete $courselogs{$crsid};
1830: }
1831: }
1832: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1833: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1834: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1835: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1836: } else {
1837: $courseidbuffer{$coursehombuf{$crsid}}=
1838: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1839: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1840: }
1841: }
1842: #
1843: # Write course id database (reverse lookup) to homeserver of courses
1844: # Is used in pickcourse
1845: #
1846: foreach my $crs_home (keys(%courseidbuffer)) {
1847: &courseidput($hostdom{$crs_home},$courseidbuffer{$crs_home},
1848: $crs_home);
1849: }
1850: #
1851: # File accesses
1852: # Writes to the dynamic metadata of resources to get hit counts, etc.
1853: #
1854: foreach my $entry (keys(%accesshash)) {
1855: if ($entry =~ /___count$/) {
1856: my ($dom,$name);
1857: ($dom,$name,undef)=
1858: ($entry=~m{___($match_domain)/($match_name)/(.*)___count$});
1859: if (! defined($dom) || $dom eq '' ||
1860: ! defined($name) || $name eq '') {
1861: my $cid = $env{'request.course.id'};
1862: $dom = $env{'request.'.$cid.'.domain'};
1863: $name = $env{'request.'.$cid.'.num'};
1864: }
1865: my $value = $accesshash{$entry};
1866: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1867: my %temphash=($url => $value);
1868: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1869: if ($result eq 'ok') {
1870: delete $accesshash{$entry};
1871: } elsif ($result eq 'unknown_cmd') {
1872: # Target server has old code running on it.
1873: my %temphash=($entry => $value);
1874: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1875: delete $accesshash{$entry};
1876: }
1877: }
1878: } else {
1879: my ($dom,$name) = ($entry=~m{___($match_domain)/($match_name)/(.*)___(\w+)$});
1880: my %temphash=($entry => $accesshash{$entry});
1881: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1882: delete $accesshash{$entry};
1883: }
1884: }
1885: }
1886: #
1887: # Roles
1888: # Reverse lookup of user roles for course faculty/staff and co-authorship
1889: #
1890: foreach my $entry (keys(%userrolehash)) {
1891: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1892: split(/\:/,$entry);
1893: if (&Apache::lonnet::put('nohist_userroles',
1894: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1895: $rudom,$runame) eq 'ok') {
1896: delete $userrolehash{$entry};
1897: }
1898: }
1899: #
1900: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1901: #
1902: my %domrolebuffer = ();
1903: foreach my $entry (keys %domainrolehash) {
1904: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1905: if ($domrolebuffer{$rudom}) {
1906: $domrolebuffer{$rudom}.='&'.&escape($entry).
1907: '='.&escape($domainrolehash{$entry});
1908: } else {
1909: $domrolebuffer{$rudom}.=&escape($entry).
1910: '='.&escape($domainrolehash{$entry});
1911: }
1912: delete $domainrolehash{$entry};
1913: }
1914: foreach my $dom (keys(%domrolebuffer)) {
1915: foreach my $tryserver (keys %libserv) {
1916: if ($hostdom{$tryserver} eq $dom) {
1917: unless (&reply('domroleput:'.$dom.':'.
1918: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1919: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1920: }
1921: }
1922: }
1923: }
1924: $dumpcount++;
1925: }
1926:
1927: sub courselog {
1928: my $what=shift;
1929: $what=time.':'.$what;
1930: unless ($env{'request.course.id'}) { return ''; }
1931: $coursedombuf{$env{'request.course.id'}}=
1932: $env{'course.'.$env{'request.course.id'}.'.domain'};
1933: $coursenumbuf{$env{'request.course.id'}}=
1934: $env{'course.'.$env{'request.course.id'}.'.num'};
1935: $coursehombuf{$env{'request.course.id'}}=
1936: $env{'course.'.$env{'request.course.id'}.'.home'};
1937: $coursedescrbuf{$env{'request.course.id'}}=
1938: $env{'course.'.$env{'request.course.id'}.'.description'};
1939: $courseinstcodebuf{$env{'request.course.id'}}=
1940: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1941: $courseownerbuf{$env{'request.course.id'}}=
1942: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1943: $coursetypebuf{$env{'request.course.id'}}=
1944: $env{'course.'.$env{'request.course.id'}.'.type'};
1945: if (defined $courselogs{$env{'request.course.id'}}) {
1946: $courselogs{$env{'request.course.id'}}.='&'.$what;
1947: } else {
1948: $courselogs{$env{'request.course.id'}}.=$what;
1949: }
1950: if (length($courselogs{$env{'request.course.id'}})>4048) {
1951: &flushcourselogs();
1952: }
1953: }
1954:
1955: sub courseacclog {
1956: my $fnsymb=shift;
1957: unless ($env{'request.course.id'}) { return ''; }
1958: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1959: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1960: $what.=':POST';
1961: # FIXME: Probably ought to escape things....
1962: foreach my $key (keys(%env)) {
1963: if ($key=~/^form\.(.*)/) {
1964: $what.=':'.$1.'='.$env{$key};
1965: }
1966: }
1967: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1968: # FIXME: We should not be depending on a form parameter that someone
1969: # editing lonsearchcat.pm might change in the future.
1970: if ($env{'form.phase'} eq 'course_search') {
1971: $what.= ':POST';
1972: # FIXME: Probably ought to escape things....
1973: foreach my $element ('courseexp','crsfulltext','crsrelated',
1974: 'crsdiscuss') {
1975: $what.=':'.$element.'='.$env{'form.'.$element};
1976: }
1977: }
1978: }
1979: &courselog($what);
1980: }
1981:
1982: sub countacc {
1983: my $url=&declutter(shift);
1984: return if (! defined($url) || $url eq '');
1985: unless ($env{'request.course.id'}) { return ''; }
1986: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1987: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1988: $accesshash{$key}++;
1989: }
1990:
1991: sub linklog {
1992: my ($from,$to)=@_;
1993: $from=&declutter($from);
1994: $to=&declutter($to);
1995: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1996: $accesshash{$to.'___'.$from.'___goto'}=1;
1997: }
1998:
1999: sub userrolelog {
2000: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
2001: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
2002: ($trole=~/^in/) || ($trole=~/^cc/) ||
2003: ($trole=~/^ep/) || ($trole=~/^cr/) ||
2004: ($trole=~/^ta/)) {
2005: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
2006: $userrolehash
2007: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
2008: =$tend.':'.$tstart;
2009: }
2010: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
2011: ($trole=~/^li/) || ($trole=~/^li/) ||
2012: ($trole=~/^au/) || ($trole=~/^dg/) ||
2013: ($trole=~/^sc/)) {
2014: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
2015: $domainrolehash
2016: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
2017: = $tend.':'.$tstart;
2018: }
2019: }
2020:
2021: sub get_course_adv_roles {
2022: my $cid=shift;
2023: $cid=$env{'request.course.id'} unless (defined($cid));
2024: my %coursehash=&coursedescription($cid);
2025: my %nothide=();
2026: foreach my $user (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
2027: $nothide{join(':',split(/[\@\:]/,$user))}=1;
2028: }
2029: my %returnhash=();
2030: my %dumphash=
2031: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
2032: my $now=time;
2033: foreach my $entry (keys %dumphash) {
2034: my ($tend,$tstart)=split(/\:/,$dumphash{$entry});
2035: if (($tstart) && ($tstart<0)) { next; }
2036: if (($tend) && ($tend<$now)) { next; }
2037: if (($tstart) && ($now<$tstart)) { next; }
2038: my ($role,$username,$domain,$section)=split(/\:/,$entry);
2039: if ($username eq '' || $domain eq '') { next; }
2040: if ((&privileged($username,$domain)) &&
2041: (!$nothide{$username.':'.$domain})) { next; }
2042: if ($role eq 'cr') { next; }
2043: my $key=&plaintext($role);
2044: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
2045: if ($returnhash{$key}) {
2046: $returnhash{$key}.=','.$username.':'.$domain;
2047: } else {
2048: $returnhash{$key}=$username.':'.$domain;
2049: }
2050: }
2051: return %returnhash;
2052: }
2053:
2054: sub get_my_roles {
2055: my ($uname,$udom,$types,$roles,$roledoms)=@_;
2056: unless (defined($uname)) { $uname=$env{'user.name'}; }
2057: unless (defined($udom)) { $udom=$env{'user.domain'}; }
2058: my %dumphash=
2059: &dump('nohist_userroles',$udom,$uname);
2060: my %returnhash=();
2061: my $now=time;
2062: foreach my $entry (keys(%dumphash)) {
2063: my ($tend,$tstart)=split(/\:/,$dumphash{$entry});
2064: if (($tstart) && ($tstart<0)) { next; }
2065: my $status = 'active';
2066: if (($tend) && ($tend<$now)) {
2067: $status = 'previous';
2068: }
2069: if (($tstart) && ($now<$tstart)) {
2070: $status = 'future';
2071: }
2072: if (ref($types) eq 'ARRAY') {
2073: if (!grep(/^\Q$status\E$/,@{$types})) {
2074: next;
2075: }
2076: } else {
2077: if ($status ne 'active') {
2078: next;
2079: }
2080: }
2081: my ($role,$username,$domain,$section)=split(/\:/,$entry);
2082: if (ref($roledoms) eq 'ARRAY') {
2083: if (!grep(/^\Q$domain\E$/,@{$roledoms})) {
2084: next;
2085: }
2086: }
2087: if (ref($roles) eq 'ARRAY') {
2088: if (!grep(/^\Q$role\E$/,@{$roles})) {
2089: next;
2090: }
2091: }
2092: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
2093: }
2094: return %returnhash;
2095: }
2096:
2097: # ----------------------------------------------------- Frontpage Announcements
2098: #
2099: #
2100:
2101: sub postannounce {
2102: my ($server,$text)=@_;
2103: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
2104: unless ($text=~/\w/) { $text=''; }
2105: return &reply('setannounce:'.&escape($text),$server);
2106: }
2107:
2108: sub getannounce {
2109:
2110: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
2111: my $announcement='';
2112: while (my $line = <$fh>) { $announcement .= $line; }
2113: close($fh);
2114: if ($announcement=~/\w/) {
2115: return
2116: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
2117: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
2118: } else {
2119: return '';
2120: }
2121: } else {
2122: return '';
2123: }
2124: }
2125:
2126: # ---------------------------------------------------------- Course ID routines
2127: # Deal with domain's nohist_courseid.db files
2128: #
2129:
2130: sub courseidput {
2131: my ($domain,$what,$coursehome)=@_;
2132: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
2133: }
2134:
2135: sub courseiddump {
2136: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref,$typefilter,$regexp_ok)=@_;
2137: my %returnhash=();
2138: unless ($domfilter) { $domfilter=''; }
2139: foreach my $tryserver (keys %libserv) {
2140: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
2141: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
2142: foreach my $line (
2143: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
2144: $sincefilter.':'.&escape($descfilter).':'.
2145: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter).':'.&escape($typefilter).':'.&escape($regexp_ok),
2146: $tryserver))) {
2147: my ($key,$value)=split(/\=/,$line,2);
2148: if (($key) && ($value)) {
2149: $returnhash{&unescape($key)}=$value;
2150: }
2151: }
2152: }
2153: }
2154: }
2155: return %returnhash;
2156: }
2157:
2158: # ---------------------------------------------------------- DC e-mail
2159:
2160: sub dcmailput {
2161: my ($domain,$msgid,$message,$server)=@_;
2162: my $status = &Apache::lonnet::critical(
2163: 'dcmailput:'.$domain.':'.&escape($msgid).'='.
2164: &escape($message),$server);
2165: return $status;
2166: }
2167:
2168: sub dcmaildump {
2169: my ($dom,$startdate,$enddate,$senders) = @_;
2170: my %returnhash=();
2171: if (exists($domain_primary{$dom})) {
2172: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
2173: &escape($enddate).':';
2174: my @esc_senders=map { &escape($_)} @$senders;
2175: $cmd.=&escape(join('&',@esc_senders));
2176: foreach my $line (split(/\&/,&reply($cmd,$domain_primary{$dom}))) {
2177: my ($key,$value) = split(/\=/,$line,2);
2178: if (($key) && ($value)) {
2179: $returnhash{&unescape($key)} = &unescape($value);
2180: }
2181: }
2182: }
2183: return %returnhash;
2184: }
2185: # ---------------------------------------------------------- Domain roles
2186:
2187: sub get_domain_roles {
2188: my ($dom,$roles,$startdate,$enddate)=@_;
2189: if (undef($startdate) || $startdate eq '') {
2190: $startdate = '.';
2191: }
2192: if (undef($enddate) || $enddate eq '') {
2193: $enddate = '.';
2194: }
2195: my $rolelist = join(':',@{$roles});
2196: my %personnel = ();
2197: foreach my $tryserver (keys(%libserv)) {
2198: if ($hostdom{$tryserver} eq $dom) {
2199: %{$personnel{$tryserver}}=();
2200: foreach my $line (
2201: split(/\&/,&reply('domrolesdump:'.$dom.':'.
2202: &escape($startdate).':'.&escape($enddate).':'.
2203: &escape($rolelist), $tryserver))) {
2204: my ($key,$value) = split(/\=/,$line,2);
2205: if (($key) && ($value)) {
2206: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
2207: }
2208: }
2209: }
2210: }
2211: return %personnel;
2212: }
2213:
2214: # ----------------------------------------------------------- Check out an item
2215:
2216: sub get_first_access {
2217: my ($type,$argsymb)=@_;
2218: my ($symb,$courseid,$udom,$uname)=&whichuser();
2219: if ($argsymb) { $symb=$argsymb; }
2220: my ($map,$id,$res)=&decode_symb($symb);
2221: if ($type eq 'map') {
2222: $res=&symbread($map);
2223: } else {
2224: $res=$symb;
2225: }
2226: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
2227: return $times{"$courseid\0$res"};
2228: }
2229:
2230: sub set_first_access {
2231: my ($type)=@_;
2232: my ($symb,$courseid,$udom,$uname)=&whichuser();
2233: my ($map,$id,$res)=&decode_symb($symb);
2234: if ($type eq 'map') {
2235: $res=&symbread($map);
2236: } else {
2237: $res=$symb;
2238: }
2239: my $firstaccess=&get_first_access($type,$symb);
2240: if (!$firstaccess) {
2241: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
2242: }
2243: return 'already_set';
2244: }
2245:
2246: sub checkout {
2247: my ($symb,$tuname,$tudom,$tcrsid)=@_;
2248: my $now=time;
2249: my $lonhost=$perlvar{'lonHostID'};
2250: my $infostr=&escape(
2251: 'CHECKOUTTOKEN&'.
2252: $tuname.'&'.
2253: $tudom.'&'.
2254: $tcrsid.'&'.
2255: $symb.'&'.
2256: $now.'&'.$ENV{'REMOTE_ADDR'});
2257: my $token=&reply('tmpput:'.$infostr,$lonhost);
2258: if ($token=~/^error\:/) {
2259: &logthis("<font color=\"blue\">WARNING: ".
2260: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
2261: "</font>");
2262: return '';
2263: }
2264:
2265: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
2266: $token=~tr/a-z/A-Z/;
2267:
2268: my %infohash=('resource.0.outtoken' => $token,
2269: 'resource.0.checkouttime' => $now,
2270: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
2271:
2272: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2273: return '';
2274: } else {
2275: &logthis("<font color=\"blue\">WARNING: ".
2276: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
2277: "</font>");
2278: }
2279:
2280: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2281: &escape('Checkout '.$infostr.' - '.
2282: $token)) ne 'ok') {
2283: return '';
2284: } else {
2285: &logthis("<font color=\"blue\">WARNING: ".
2286: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
2287: "</font>");
2288: }
2289: return $token;
2290: }
2291:
2292: # ------------------------------------------------------------ Check in an item
2293:
2294: sub checkin {
2295: my $token=shift;
2296: my $now=time;
2297: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2298: $lonhost=~tr/A-Z/a-z/;
2299: my $dtoken=$ta.'_'.&hostname($lonhost).'_'.$tb;
2300: $dtoken=~s/\W/\_/g;
2301: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2302: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2303:
2304: unless (($tuname) && ($tudom)) {
2305: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2306: return '';
2307: }
2308:
2309: unless (&allowed('mgr',$tcrsid)) {
2310: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2311: $env{'user.name'}.' - '.$env{'user.domain'});
2312: return '';
2313: }
2314:
2315: my %infohash=('resource.0.intoken' => $token,
2316: 'resource.0.checkintime' => $now,
2317: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2318:
2319: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2320: return '';
2321: }
2322:
2323: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2324: &escape('Checkin - '.$token)) ne 'ok') {
2325: return '';
2326: }
2327:
2328: return ($symb,$tuname,$tudom,$tcrsid);
2329: }
2330:
2331: # --------------------------------------------- Set Expire Date for Spreadsheet
2332:
2333: sub expirespread {
2334: my ($uname,$udom,$stype,$usymb)=@_;
2335: my $cid=$env{'request.course.id'};
2336: if ($cid) {
2337: my $now=time;
2338: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2339: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2340: $env{'course.'.$cid.'.num'}.
2341: ':nohist_expirationdates:'.
2342: &escape($key).'='.$now,
2343: $env{'course.'.$cid.'.home'})
2344: }
2345: return 'ok';
2346: }
2347:
2348: # ----------------------------------------------------- Devalidate Spreadsheets
2349:
2350: sub devalidate {
2351: my ($symb,$uname,$udom)=@_;
2352: my $cid=$env{'request.course.id'};
2353: if ($cid) {
2354: # delete the stored spreadsheets for
2355: # - the student level sheet of this user in course's homespace
2356: # - the assessment level sheet for this resource
2357: # for this user in user's homespace
2358: # - current conditional state info
2359: my $key=$uname.':'.$udom.':';
2360: my $status=
2361: &del('nohist_calculatedsheets',
2362: [$key.'studentcalc:'],
2363: $env{'course.'.$cid.'.domain'},
2364: $env{'course.'.$cid.'.num'})
2365: .' '.
2366: &del('nohist_calculatedsheets_'.$cid,
2367: [$key.'assesscalc:'.$symb],$udom,$uname);
2368: unless ($status eq 'ok ok') {
2369: &logthis('Could not devalidate spreadsheet '.
2370: $uname.' at '.$udom.' for '.
2371: $symb.': '.$status);
2372: }
2373: &delenv('user.state.'.$cid);
2374: }
2375: }
2376:
2377: sub get_scalar {
2378: my ($string,$end) = @_;
2379: my $value;
2380: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2381: $value = $1;
2382: } elsif ($$string =~ s/^([^&]*?)&//) {
2383: $value = $1;
2384: }
2385: return &unescape($value);
2386: }
2387:
2388: sub array2str {
2389: my (@array) = @_;
2390: my $result=&arrayref2str(\@array);
2391: $result=~s/^__ARRAY_REF__//;
2392: $result=~s/__END_ARRAY_REF__$//;
2393: return $result;
2394: }
2395:
2396: sub arrayref2str {
2397: my ($arrayref) = @_;
2398: my $result='__ARRAY_REF__';
2399: foreach my $elem (@$arrayref) {
2400: if(ref($elem) eq 'ARRAY') {
2401: $result.=&arrayref2str($elem).'&';
2402: } elsif(ref($elem) eq 'HASH') {
2403: $result.=&hashref2str($elem).'&';
2404: } elsif(ref($elem)) {
2405: #print("Got a ref of ".(ref($elem))." skipping.");
2406: } else {
2407: $result.=&escape($elem).'&';
2408: }
2409: }
2410: $result=~s/\&$//;
2411: $result .= '__END_ARRAY_REF__';
2412: return $result;
2413: }
2414:
2415: sub hash2str {
2416: my (%hash) = @_;
2417: my $result=&hashref2str(\%hash);
2418: $result=~s/^__HASH_REF__//;
2419: $result=~s/__END_HASH_REF__$//;
2420: return $result;
2421: }
2422:
2423: sub hashref2str {
2424: my ($hashref)=@_;
2425: my $result='__HASH_REF__';
2426: foreach my $key (sort(keys(%$hashref))) {
2427: if (ref($key) eq 'ARRAY') {
2428: $result.=&arrayref2str($key).'=';
2429: } elsif (ref($key) eq 'HASH') {
2430: $result.=&hashref2str($key).'=';
2431: } elsif (ref($key)) {
2432: $result.='=';
2433: #print("Got a ref of ".(ref($key))." skipping.");
2434: } else {
2435: if ($key) {$result.=&escape($key).'=';} else { last; }
2436: }
2437:
2438: if(ref($hashref->{$key}) eq 'ARRAY') {
2439: $result.=&arrayref2str($hashref->{$key}).'&';
2440: } elsif(ref($hashref->{$key}) eq 'HASH') {
2441: $result.=&hashref2str($hashref->{$key}).'&';
2442: } elsif(ref($hashref->{$key})) {
2443: $result.='&';
2444: #print("Got a ref of ".(ref($hashref->{$key}))." skipping.");
2445: } else {
2446: $result.=&escape($hashref->{$key}).'&';
2447: }
2448: }
2449: $result=~s/\&$//;
2450: $result .= '__END_HASH_REF__';
2451: return $result;
2452: }
2453:
2454: sub str2hash {
2455: my ($string)=@_;
2456: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2457: return %$hash;
2458: }
2459:
2460: sub str2hashref {
2461: my ($string) = @_;
2462:
2463: my %hash;
2464:
2465: if($string !~ /^__HASH_REF__/) {
2466: if (! ($string eq '' || !defined($string))) {
2467: $hash{'error'}='Not hash reference';
2468: }
2469: return (\%hash, $string);
2470: }
2471:
2472: $string =~ s/^__HASH_REF__//;
2473:
2474: while($string !~ /^__END_HASH_REF__/) {
2475: #key
2476: my $key='';
2477: if($string =~ /^__HASH_REF__/) {
2478: ($key, $string)=&str2hashref($string);
2479: if(defined($key->{'error'})) {
2480: $hash{'error'}='Bad data';
2481: return (\%hash, $string);
2482: }
2483: } elsif($string =~ /^__ARRAY_REF__/) {
2484: ($key, $string)=&str2arrayref($string);
2485: if($key->[0] eq 'Array reference error') {
2486: $hash{'error'}='Bad data';
2487: return (\%hash, $string);
2488: }
2489: } else {
2490: $string =~ s/^(.*?)=//;
2491: $key=&unescape($1);
2492: }
2493: $string =~ s/^=//;
2494:
2495: #value
2496: my $value='';
2497: if($string =~ /^__HASH_REF__/) {
2498: ($value, $string)=&str2hashref($string);
2499: if(defined($value->{'error'})) {
2500: $hash{'error'}='Bad data';
2501: return (\%hash, $string);
2502: }
2503: } elsif($string =~ /^__ARRAY_REF__/) {
2504: ($value, $string)=&str2arrayref($string);
2505: if($value->[0] eq 'Array reference error') {
2506: $hash{'error'}='Bad data';
2507: return (\%hash, $string);
2508: }
2509: } else {
2510: $value=&get_scalar(\$string,'__END_HASH_REF__');
2511: }
2512: $string =~ s/^&//;
2513:
2514: $hash{$key}=$value;
2515: }
2516:
2517: $string =~ s/^__END_HASH_REF__//;
2518:
2519: return (\%hash, $string);
2520: }
2521:
2522: sub str2array {
2523: my ($string)=@_;
2524: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2525: return @$array;
2526: }
2527:
2528: sub str2arrayref {
2529: my ($string) = @_;
2530: my @array;
2531:
2532: if($string !~ /^__ARRAY_REF__/) {
2533: if (! ($string eq '' || !defined($string))) {
2534: $array[0]='Array reference error';
2535: }
2536: return (\@array, $string);
2537: }
2538:
2539: $string =~ s/^__ARRAY_REF__//;
2540:
2541: while($string !~ /^__END_ARRAY_REF__/) {
2542: my $value='';
2543: if($string =~ /^__HASH_REF__/) {
2544: ($value, $string)=&str2hashref($string);
2545: if(defined($value->{'error'})) {
2546: $array[0] ='Array reference error';
2547: return (\@array, $string);
2548: }
2549: } elsif($string =~ /^__ARRAY_REF__/) {
2550: ($value, $string)=&str2arrayref($string);
2551: if($value->[0] eq 'Array reference error') {
2552: $array[0] ='Array reference error';
2553: return (\@array, $string);
2554: }
2555: } else {
2556: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2557: }
2558: $string =~ s/^&//;
2559:
2560: push(@array, $value);
2561: }
2562:
2563: $string =~ s/^__END_ARRAY_REF__//;
2564:
2565: return (\@array, $string);
2566: }
2567:
2568: # -------------------------------------------------------------------Temp Store
2569:
2570: sub tmpreset {
2571: my ($symb,$namespace,$domain,$stuname) = @_;
2572: if (!$symb) {
2573: $symb=&symbread();
2574: if (!$symb) { $symb= $env{'request.url'}; }
2575: }
2576: $symb=escape($symb);
2577:
2578: if (!$namespace) { $namespace=$env{'request.state'}; }
2579: $namespace=~s/\//\_/g;
2580: $namespace=~s/\W//g;
2581:
2582: if (!$domain) { $domain=$env{'user.domain'}; }
2583: if (!$stuname) { $stuname=$env{'user.name'}; }
2584: if ($domain eq 'public' && $stuname eq 'public') {
2585: $stuname=$ENV{'REMOTE_ADDR'};
2586: }
2587: my $path=$perlvar{'lonDaemons'}.'/tmp';
2588: my %hash;
2589: if (tie(%hash,'GDBM_File',
2590: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2591: &GDBM_WRCREAT(),0640)) {
2592: foreach my $key (keys %hash) {
2593: if ($key=~ /:$symb/) {
2594: delete($hash{$key});
2595: }
2596: }
2597: }
2598: }
2599:
2600: sub tmpstore {
2601: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2602:
2603: if (!$symb) {
2604: $symb=&symbread();
2605: if (!$symb) { $symb= $env{'request.url'}; }
2606: }
2607: $symb=escape($symb);
2608:
2609: if (!$namespace) {
2610: # I don't think we would ever want to store this for a course.
2611: # it seems this will only be used if we don't have a course.
2612: #$namespace=$env{'request.course.id'};
2613: #if (!$namespace) {
2614: $namespace=$env{'request.state'};
2615: #}
2616: }
2617: $namespace=~s/\//\_/g;
2618: $namespace=~s/\W//g;
2619: if (!$domain) { $domain=$env{'user.domain'}; }
2620: if (!$stuname) { $stuname=$env{'user.name'}; }
2621: if ($domain eq 'public' && $stuname eq 'public') {
2622: $stuname=$ENV{'REMOTE_ADDR'};
2623: }
2624: my $now=time;
2625: my %hash;
2626: my $path=$perlvar{'lonDaemons'}.'/tmp';
2627: if (tie(%hash,'GDBM_File',
2628: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2629: &GDBM_WRCREAT(),0640)) {
2630: $hash{"version:$symb"}++;
2631: my $version=$hash{"version:$symb"};
2632: my $allkeys='';
2633: foreach my $key (keys(%$storehash)) {
2634: $allkeys.=$key.':';
2635: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2636: }
2637: $hash{"$version:$symb:timestamp"}=$now;
2638: $allkeys.='timestamp';
2639: $hash{"$version:keys:$symb"}=$allkeys;
2640: if (untie(%hash)) {
2641: return 'ok';
2642: } else {
2643: return "error:$!";
2644: }
2645: } else {
2646: return "error:$!";
2647: }
2648: }
2649:
2650: # -----------------------------------------------------------------Temp Restore
2651:
2652: sub tmprestore {
2653: my ($symb,$namespace,$domain,$stuname) = @_;
2654:
2655: if (!$symb) {
2656: $symb=&symbread();
2657: if (!$symb) { $symb= $env{'request.url'}; }
2658: }
2659: $symb=escape($symb);
2660:
2661: if (!$namespace) { $namespace=$env{'request.state'}; }
2662:
2663: if (!$domain) { $domain=$env{'user.domain'}; }
2664: if (!$stuname) { $stuname=$env{'user.name'}; }
2665: if ($domain eq 'public' && $stuname eq 'public') {
2666: $stuname=$ENV{'REMOTE_ADDR'};
2667: }
2668: my %returnhash;
2669: $namespace=~s/\//\_/g;
2670: $namespace=~s/\W//g;
2671: my %hash;
2672: my $path=$perlvar{'lonDaemons'}.'/tmp';
2673: if (tie(%hash,'GDBM_File',
2674: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2675: &GDBM_READER(),0640)) {
2676: my $version=$hash{"version:$symb"};
2677: $returnhash{'version'}=$version;
2678: my $scope;
2679: for ($scope=1;$scope<=$version;$scope++) {
2680: my $vkeys=$hash{"$scope:keys:$symb"};
2681: my @keys=split(/:/,$vkeys);
2682: my $key;
2683: $returnhash{"$scope:keys"}=$vkeys;
2684: foreach $key (@keys) {
2685: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2686: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2687: }
2688: }
2689: if (!(untie(%hash))) {
2690: return "error:$!";
2691: }
2692: } else {
2693: return "error:$!";
2694: }
2695: return %returnhash;
2696: }
2697:
2698: # ----------------------------------------------------------------------- Store
2699:
2700: sub store {
2701: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2702: my $home='';
2703:
2704: if ($stuname) { $home=&homeserver($stuname,$domain); }
2705:
2706: $symb=&symbclean($symb);
2707: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2708:
2709: if (!$domain) { $domain=$env{'user.domain'}; }
2710: if (!$stuname) { $stuname=$env{'user.name'}; }
2711:
2712: &devalidate($symb,$stuname,$domain);
2713:
2714: $symb=escape($symb);
2715: if (!$namespace) {
2716: unless ($namespace=$env{'request.course.id'}) {
2717: return '';
2718: }
2719: }
2720: if (!$home) { $home=$env{'user.home'}; }
2721:
2722: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2723: $$storehash{'host'}=$perlvar{'lonHostID'};
2724:
2725: my $namevalue='';
2726: foreach my $key (keys(%$storehash)) {
2727: $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
2728: }
2729: $namevalue=~s/\&$//;
2730: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2731: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2732: }
2733:
2734: # -------------------------------------------------------------- Critical Store
2735:
2736: sub cstore {
2737: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2738: my $home='';
2739:
2740: if ($stuname) { $home=&homeserver($stuname,$domain); }
2741:
2742: $symb=&symbclean($symb);
2743: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2744:
2745: if (!$domain) { $domain=$env{'user.domain'}; }
2746: if (!$stuname) { $stuname=$env{'user.name'}; }
2747:
2748: &devalidate($symb,$stuname,$domain);
2749:
2750: $symb=escape($symb);
2751: if (!$namespace) {
2752: unless ($namespace=$env{'request.course.id'}) {
2753: return '';
2754: }
2755: }
2756: if (!$home) { $home=$env{'user.home'}; }
2757:
2758: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2759: $$storehash{'host'}=$perlvar{'lonHostID'};
2760:
2761: my $namevalue='';
2762: foreach my $key (keys(%$storehash)) {
2763: $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
2764: }
2765: $namevalue=~s/\&$//;
2766: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2767: return critical
2768: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2769: }
2770:
2771: # --------------------------------------------------------------------- Restore
2772:
2773: sub restore {
2774: my ($symb,$namespace,$domain,$stuname) = @_;
2775: my $home='';
2776:
2777: if ($stuname) { $home=&homeserver($stuname,$domain); }
2778:
2779: if (!$symb) {
2780: unless ($symb=escape(&symbread())) { return ''; }
2781: } else {
2782: $symb=&escape(&symbclean($symb));
2783: }
2784: if (!$namespace) {
2785: unless ($namespace=$env{'request.course.id'}) {
2786: return '';
2787: }
2788: }
2789: if (!$domain) { $domain=$env{'user.domain'}; }
2790: if (!$stuname) { $stuname=$env{'user.name'}; }
2791: if (!$home) { $home=$env{'user.home'}; }
2792: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2793:
2794: my %returnhash=();
2795: foreach my $line (split(/\&/,$answer)) {
2796: my ($name,$value)=split(/\=/,$line);
2797: $returnhash{&unescape($name)}=&thaw_unescape($value);
2798: }
2799: my $version;
2800: for ($version=1;$version<=$returnhash{'version'};$version++) {
2801: foreach my $item (split(/\:/,$returnhash{$version.':keys'})) {
2802: $returnhash{$item}=$returnhash{$version.':'.$item};
2803: }
2804: }
2805: return %returnhash;
2806: }
2807:
2808: # ---------------------------------------------------------- Course Description
2809:
2810: sub coursedescription {
2811: my ($courseid,$args)=@_;
2812: $courseid=~s/^\///;
2813: $courseid=~s/\_/\//g;
2814: my ($cdomain,$cnum)=split(/\//,$courseid);
2815: my $chome=&homeserver($cnum,$cdomain);
2816: my $normalid=$cdomain.'_'.$cnum;
2817: # need to always cache even if we get errors otherwise we keep
2818: # trying and trying and trying to get the course description.
2819: my %envhash=();
2820: my %returnhash=();
2821:
2822: my $expiretime=600;
2823: if ($env{'request.course.id'} eq $normalid) {
2824: $expiretime=120;
2825: }
2826:
2827: my $prefix='course.'.$cdomain.'_'.$cnum.'.';
2828: if (!$args->{'freshen_cache'}
2829: && ((time-$env{$prefix.'last_cache'}) < $expiretime) ) {
2830: foreach my $key (keys(%env)) {
2831: next if ($key !~ /^\Q$prefix\E(.*)/);
2832: my ($setting) = $1;
2833: $returnhash{$setting} = $env{$key};
2834: }
2835: return %returnhash;
2836: }
2837:
2838: # get the data agin
2839: if (!$args->{'one_time'}) {
2840: $envhash{'course.'.$normalid.'.last_cache'}=time;
2841: }
2842:
2843: if ($chome ne 'no_host') {
2844: %returnhash=&dump('environment',$cdomain,$cnum);
2845: if (!exists($returnhash{'con_lost'})) {
2846: $returnhash{'home'}= $chome;
2847: $returnhash{'domain'} = $cdomain;
2848: $returnhash{'num'} = $cnum;
2849: if (!defined($returnhash{'type'})) {
2850: $returnhash{'type'} = 'Course';
2851: }
2852: while (my ($name,$value) = each %returnhash) {
2853: $envhash{'course.'.$normalid.'.'.$name}=$value;
2854: }
2855: $returnhash{'url'}=&clutter($returnhash{'url'});
2856: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2857: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2858: $envhash{'course.'.$normalid.'.home'}=$chome;
2859: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2860: $envhash{'course.'.$normalid.'.num'}=$cnum;
2861: }
2862: }
2863: if (!$args->{'one_time'}) {
2864: &appenv(%envhash);
2865: }
2866: return %returnhash;
2867: }
2868:
2869: # -------------------------------------------------See if a user is privileged
2870:
2871: sub privileged {
2872: my ($username,$domain)=@_;
2873: my $rolesdump=&reply("dump:$domain:$username:roles",
2874: &homeserver($username,$domain));
2875: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2876: my $now=time;
2877: if ($rolesdump ne '') {
2878: foreach my $entry (split(/&/,$rolesdump)) {
2879: if ($entry!~/^rolesdef_/) {
2880: my ($area,$role)=split(/=/,$entry);
2881: $area=~s/\_\w\w$//;
2882: my ($trole,$tend,$tstart)=split(/_/,$role);
2883: if (($trole eq 'dc') || ($trole eq 'su')) {
2884: my $active=1;
2885: if ($tend) {
2886: if ($tend<$now) { $active=0; }
2887: }
2888: if ($tstart) {
2889: if ($tstart>$now) { $active=0; }
2890: }
2891: if ($active) { return 1; }
2892: }
2893: }
2894: }
2895: }
2896: return 0;
2897: }
2898:
2899: # -------------------------------------------------------- Get user privileges
2900:
2901: sub rolesinit {
2902: my ($domain,$username,$authhost)=@_;
2903: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2904: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2905: my %allroles=();
2906: my %allgroups=();
2907: my $now=time;
2908: my %userroles = ('user.login.time' => $now);
2909: my $group_privs;
2910:
2911: if ($rolesdump ne '') {
2912: foreach my $entry (split(/&/,$rolesdump)) {
2913: if ($entry!~/^rolesdef_/) {
2914: my ($area,$role)=split(/=/,$entry);
2915: $area=~s/\_\w\w$//;
2916: my ($trole,$tend,$tstart,$group_privs);
2917: if ($role=~/^cr/) {
2918: if ($role=~m|^(cr/$match_domain/$match_username/[a-zA-Z0-9]+)_(.*)$|) {
2919: ($trole,my $trest)=($role=~m|^(cr/$match_domain/$match_username/[a-zA-Z0-9]+)_(.*)$|);
2920: ($tend,$tstart)=split('_',$trest);
2921: } else {
2922: $trole=$role;
2923: }
2924: } elsif ($role =~ m|^gr/|) {
2925: ($trole,$tend,$tstart) = split(/_/,$role);
2926: ($trole,$group_privs) = split(/\//,$trole);
2927: $group_privs = &unescape($group_privs);
2928: } else {
2929: ($trole,$tend,$tstart)=split(/_/,$role);
2930: }
2931: my %new_role = &set_arearole($trole,$area,$tstart,$tend,$domain,
2932: $username);
2933: @userroles{keys(%new_role)} = @new_role{keys(%new_role)};
2934: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2935: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2936: if (($area ne '') && ($trole ne '')) {
2937: my $spec=$trole.'.'.$area;
2938: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2939: if ($trole =~ /^cr\//) {
2940: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2941: } elsif ($trole eq 'gr') {
2942: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
2943: } else {
2944: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2945: }
2946: }
2947: }
2948: }
2949: my ($author,$adv) = &set_userprivs(\%userroles,\%allroles,\%allgroups);
2950: $userroles{'user.adv'} = $adv;
2951: $userroles{'user.author'} = $author;
2952: $env{'user.adv'}=$adv;
2953: }
2954: return \%userroles;
2955: }
2956:
2957: sub set_arearole {
2958: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2959: # log the associated role with the area
2960: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2961: return ('user.role.'.$trole.'.'.$area => $tstart.'.'.$tend);
2962: }
2963:
2964: sub custom_roleprivs {
2965: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2966: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2967: my $homsvr=homeserver($rauthor,$rdomain);
2968: if (&hostname($homsvr) ne '') {
2969: my ($rdummy,$roledef)=
2970: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2971: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2972: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2973: if (defined($syspriv)) {
2974: $$allroles{'cm./'}.=':'.$syspriv;
2975: $$allroles{$spec.'./'}.=':'.$syspriv;
2976: }
2977: if ($tdomain ne '') {
2978: if (defined($dompriv)) {
2979: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2980: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2981: }
2982: if (($trest ne '') && (defined($coursepriv))) {
2983: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2984: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2985: }
2986: }
2987: }
2988: }
2989: }
2990:
2991: sub group_roleprivs {
2992: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
2993: my $access = 1;
2994: my $now = time;
2995: if (($tend!=0) && ($tend<$now)) { $access = 0; }
2996: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
2997: if ($access) {
2998: my ($course,$group) = ($area =~ m|(/$match_domain/$match_courseid)/([^/]+)$|);
2999: $$allgroups{$course}{$group} .=':'.$group_privs;
3000: }
3001: }
3002:
3003: sub standard_roleprivs {
3004: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
3005: if (defined($pr{$trole.':s'})) {
3006: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
3007: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
3008: }
3009: if ($tdomain ne '') {
3010: if (defined($pr{$trole.':d'})) {
3011: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
3012: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
3013: }
3014: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
3015: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
3016: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
3017: }
3018: }
3019: }
3020:
3021: sub set_userprivs {
3022: my ($userroles,$allroles,$allgroups) = @_;
3023: my $author=0;
3024: my $adv=0;
3025: my %grouproles = ();
3026: if (keys(%{$allgroups}) > 0) {
3027: foreach my $role (keys %{$allroles}) {
3028: my ($trole,$area,$sec,$extendedarea);
3029: if ($role =~ m-^(\w+|cr/$match_domain/$match_username/\w+)\.(/$match_domain/$match_courseid)(/?\w*)-) {
3030: $trole = $1;
3031: $area = $2;
3032: $sec = $3;
3033: $extendedarea = $area.$sec;
3034: if (exists($$allgroups{$area})) {
3035: foreach my $group (keys(%{$$allgroups{$area}})) {
3036: my $spec = $trole.'.'.$extendedarea;
3037: $grouproles{$spec.'.'.$area.'/'.$group} =
3038: $$allgroups{$area}{$group};
3039: }
3040: }
3041: }
3042: }
3043: }
3044: foreach my $group (keys(%grouproles)) {
3045: $$allroles{$group} = $grouproles{$group};
3046: }
3047: foreach my $role (keys(%{$allroles})) {
3048: my %thesepriv;
3049: if (($role=~/^au/) || ($role=~/^ca/)) { $author=1; }
3050: foreach my $item (split(/:/,$$allroles{$role})) {
3051: if ($item ne '') {
3052: my ($privilege,$restrictions)=split(/&/,$item);
3053: if ($restrictions eq '') {
3054: $thesepriv{$privilege}='F';
3055: } elsif ($thesepriv{$privilege} ne 'F') {
3056: $thesepriv{$privilege}.=$restrictions;
3057: }
3058: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
3059: }
3060: }
3061: my $thesestr='';
3062: foreach my $priv (keys(%thesepriv)) {
3063: $thesestr.=':'.$priv.'&'.$thesepriv{$priv};
3064: }
3065: $userroles->{'user.priv.'.$role} = $thesestr;
3066: }
3067: return ($author,$adv);
3068: }
3069:
3070: # --------------------------------------------------------------- get interface
3071:
3072: sub get {
3073: my ($namespace,$storearr,$udomain,$uname)=@_;
3074: my $items='';
3075: foreach my $item (@$storearr) {
3076: $items.=&escape($item).'&';
3077: }
3078: $items=~s/\&$//;
3079: if (!$udomain) { $udomain=$env{'user.domain'}; }
3080: if (!$uname) { $uname=$env{'user.name'}; }
3081: my $uhome=&homeserver($uname,$udomain);
3082:
3083: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
3084: my @pairs=split(/\&/,$rep);
3085: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
3086: return @pairs;
3087: }
3088: my %returnhash=();
3089: my $i=0;
3090: foreach my $item (@$storearr) {
3091: $returnhash{$item}=&thaw_unescape($pairs[$i]);
3092: $i++;
3093: }
3094: return %returnhash;
3095: }
3096:
3097: # --------------------------------------------------------------- del interface
3098:
3099: sub del {
3100: my ($namespace,$storearr,$udomain,$uname)=@_;
3101: my $items='';
3102: foreach my $item (@$storearr) {
3103: $items.=&escape($item).'&';
3104: }
3105: $items=~s/\&$//;
3106: if (!$udomain) { $udomain=$env{'user.domain'}; }
3107: if (!$uname) { $uname=$env{'user.name'}; }
3108: my $uhome=&homeserver($uname,$udomain);
3109:
3110: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
3111: }
3112:
3113: # -------------------------------------------------------------- dump interface
3114:
3115: sub dump {
3116: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
3117: if (!$udomain) { $udomain=$env{'user.domain'}; }
3118: if (!$uname) { $uname=$env{'user.name'}; }
3119: my $uhome=&homeserver($uname,$udomain);
3120: if ($regexp) {
3121: $regexp=&escape($regexp);
3122: } else {
3123: $regexp='.';
3124: }
3125: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
3126: my @pairs=split(/\&/,$rep);
3127: my %returnhash=();
3128: foreach my $item (@pairs) {
3129: my ($key,$value)=split(/=/,$item,2);
3130: $key = &unescape($key);
3131: next if ($key =~ /^error: 2 /);
3132: $returnhash{$key}=&thaw_unescape($value);
3133: }
3134: return %returnhash;
3135: }
3136:
3137: # --------------------------------------------------------- dumpstore interface
3138:
3139: sub dumpstore {
3140: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
3141: if (!$udomain) { $udomain=$env{'user.domain'}; }
3142: if (!$uname) { $uname=$env{'user.name'}; }
3143: my $uhome=&homeserver($uname,$udomain);
3144: if ($regexp) {
3145: $regexp=&escape($regexp);
3146: } else {
3147: $regexp='.';
3148: }
3149: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
3150: my @pairs=split(/\&/,$rep);
3151: my %returnhash=();
3152: foreach my $item (@pairs) {
3153: my ($key,$value)=split(/=/,$item,2);
3154: next if ($key =~ /^error: 2 /);
3155: $returnhash{$key}=&thaw_unescape($value);
3156: }
3157: return %returnhash;
3158: }
3159:
3160: # -------------------------------------------------------------- keys interface
3161:
3162: sub getkeys {
3163: my ($namespace,$udomain,$uname)=@_;
3164: if (!$udomain) { $udomain=$env{'user.domain'}; }
3165: if (!$uname) { $uname=$env{'user.name'}; }
3166: my $uhome=&homeserver($uname,$udomain);
3167: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
3168: my @keyarray=();
3169: foreach my $key (split(/\&/,$rep)) {
3170: next if ($key =~ /^error: 2 /);
3171: push(@keyarray,&unescape($key));
3172: }
3173: return @keyarray;
3174: }
3175:
3176: # --------------------------------------------------------------- currentdump
3177: sub currentdump {
3178: my ($courseid,$sdom,$sname)=@_;
3179: $courseid = $env{'request.course.id'} if (! defined($courseid));
3180: $sdom = $env{'user.domain'} if (! defined($sdom));
3181: $sname = $env{'user.name'} if (! defined($sname));
3182: my $uhome = &homeserver($sname,$sdom);
3183: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
3184: return if ($rep =~ /^(error:|no_such_host)/);
3185: #
3186: my %returnhash=();
3187: #
3188: if ($rep eq "unknown_cmd") {
3189: # an old lond will not know currentdump
3190: # Do a dump and make it look like a currentdump
3191: my @tmp = &dumpstore($courseid,$sdom,$sname,'.');
3192: return if ($tmp[0] =~ /^(error:|no_such_host)/);
3193: my %hash = @tmp;
3194: @tmp=();
3195: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
3196: } else {
3197: my @pairs=split(/\&/,$rep);
3198: foreach my $pair (@pairs) {
3199: my ($key,$value)=split(/=/,$pair,2);
3200: my ($symb,$param) = split(/:/,$key);
3201: $returnhash{&unescape($symb)}->{&unescape($param)} =
3202: &thaw_unescape($value);
3203: }
3204: }
3205: return %returnhash;
3206: }
3207:
3208: sub convert_dump_to_currentdump{
3209: my %hash = %{shift()};
3210: my %returnhash;
3211: # Code ripped from lond, essentially. The only difference
3212: # here is the unescaping done by lonnet::dump(). Conceivably
3213: # we might run in to problems with parameter names =~ /^v\./
3214: while (my ($key,$value) = each(%hash)) {
3215: my ($v,$symb,$param) = split(/:/,$key);
3216: $symb = &unescape($symb);
3217: $param = &unescape($param);
3218: next if ($v eq 'version' || $symb eq 'keys');
3219: next if (exists($returnhash{$symb}) &&
3220: exists($returnhash{$symb}->{$param}) &&
3221: $returnhash{$symb}->{'v.'.$param} > $v);
3222: $returnhash{$symb}->{$param}=$value;
3223: $returnhash{$symb}->{'v.'.$param}=$v;
3224: }
3225: #
3226: # Remove all of the keys in the hashes which keep track of
3227: # the version of the parameter.
3228: while (my ($symb,$param_hash) = each(%returnhash)) {
3229: # use a foreach because we are going to delete from the hash.
3230: foreach my $key (keys(%$param_hash)) {
3231: delete($param_hash->{$key}) if ($key =~ /^v\./);
3232: }
3233: }
3234: return \%returnhash;
3235: }
3236:
3237: # ------------------------------------------------------ critical inc interface
3238:
3239: sub cinc {
3240: return &inc(@_,'critical');
3241: }
3242:
3243: # --------------------------------------------------------------- inc interface
3244:
3245: sub inc {
3246: my ($namespace,$store,$udomain,$uname,$critical) = @_;
3247: if (!$udomain) { $udomain=$env{'user.domain'}; }
3248: if (!$uname) { $uname=$env{'user.name'}; }
3249: my $uhome=&homeserver($uname,$udomain);
3250: my $items='';
3251: if (! ref($store)) {
3252: # got a single value, so use that instead
3253: $items = &escape($store).'=&';
3254: } elsif (ref($store) eq 'SCALAR') {
3255: $items = &escape($$store).'=&';
3256: } elsif (ref($store) eq 'ARRAY') {
3257: $items = join('=&',map {&escape($_);} @{$store});
3258: } elsif (ref($store) eq 'HASH') {
3259: while (my($key,$value) = each(%{$store})) {
3260: $items.= &escape($key).'='.&escape($value).'&';
3261: }
3262: }
3263: $items=~s/\&$//;
3264: if ($critical) {
3265: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
3266: } else {
3267: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
3268: }
3269: }
3270:
3271: # --------------------------------------------------------------- put interface
3272:
3273: sub put {
3274: my ($namespace,$storehash,$udomain,$uname)=@_;
3275: if (!$udomain) { $udomain=$env{'user.domain'}; }
3276: if (!$uname) { $uname=$env{'user.name'}; }
3277: my $uhome=&homeserver($uname,$udomain);
3278: my $items='';
3279: foreach my $item (keys(%$storehash)) {
3280: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3281: }
3282: $items=~s/\&$//;
3283: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3284: }
3285:
3286: # ------------------------------------------------------------ newput interface
3287:
3288: sub newput {
3289: my ($namespace,$storehash,$udomain,$uname)=@_;
3290: if (!$udomain) { $udomain=$env{'user.domain'}; }
3291: if (!$uname) { $uname=$env{'user.name'}; }
3292: my $uhome=&homeserver($uname,$udomain);
3293: my $items='';
3294: foreach my $key (keys(%$storehash)) {
3295: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3296: }
3297: $items=~s/\&$//;
3298: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
3299: }
3300:
3301: # --------------------------------------------------------- putstore interface
3302:
3303: sub putstore {
3304: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3305: if (!$udomain) { $udomain=$env{'user.domain'}; }
3306: if (!$uname) { $uname=$env{'user.name'}; }
3307: my $uhome=&homeserver($uname,$udomain);
3308: my $items='';
3309: foreach my $key (keys(%$storehash)) {
3310: $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
3311: }
3312: $items=~s/\&$//;
3313: my $esc_symb=&escape($symb);
3314: my $esc_v=&escape($version);
3315: my $reply =
3316: &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
3317: $uhome);
3318: if ($reply eq 'unknown_cmd') {
3319: # gfall back to way things use to be done
3320: return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
3321: $uname);
3322: }
3323: return $reply;
3324: }
3325:
3326: sub old_putstore {
3327: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3328: if (!$udomain) { $udomain=$env{'user.domain'}; }
3329: if (!$uname) { $uname=$env{'user.name'}; }
3330: my $uhome=&homeserver($uname,$udomain);
3331: my %newstorehash;
3332: foreach my $item (keys(%$storehash)) {
3333: my $key = $version.':'.&escape($symb).':'.$item;
3334: $newstorehash{$key} = $storehash->{$item};
3335: }
3336: my $items='';
3337: my %allitems = ();
3338: foreach my $item (keys(%newstorehash)) {
3339: if ($item =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
3340: my $key = $1.':keys:'.$2;
3341: $allitems{$key} .= $3.':';
3342: }
3343: $items.=$item.'='.&freeze_escape($newstorehash{$item}).'&';
3344: }
3345: foreach my $item (keys(%allitems)) {
3346: $allitems{$item} =~ s/\:$//;
3347: $items.= $item.'='.$allitems{$item}.'&';
3348: }
3349: $items=~s/\&$//;
3350: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3351: }
3352:
3353: # ------------------------------------------------------ critical put interface
3354:
3355: sub cput {
3356: my ($namespace,$storehash,$udomain,$uname)=@_;
3357: if (!$udomain) { $udomain=$env{'user.domain'}; }
3358: if (!$uname) { $uname=$env{'user.name'}; }
3359: my $uhome=&homeserver($uname,$udomain);
3360: my $items='';
3361: foreach my $item (keys(%$storehash)) {
3362: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3363: }
3364: $items=~s/\&$//;
3365: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
3366: }
3367:
3368: # -------------------------------------------------------------- eget interface
3369:
3370: sub eget {
3371: my ($namespace,$storearr,$udomain,$uname)=@_;
3372: my $items='';
3373: foreach my $item (@$storearr) {
3374: $items.=&escape($item).'&';
3375: }
3376: $items=~s/\&$//;
3377: if (!$udomain) { $udomain=$env{'user.domain'}; }
3378: if (!$uname) { $uname=$env{'user.name'}; }
3379: my $uhome=&homeserver($uname,$udomain);
3380: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3381: my @pairs=split(/\&/,$rep);
3382: my %returnhash=();
3383: my $i=0;
3384: foreach my $item (@$storearr) {
3385: $returnhash{$item}=&thaw_unescape($pairs[$i]);
3386: $i++;
3387: }
3388: return %returnhash;
3389: }
3390:
3391: # ------------------------------------------------------------ tmpput interface
3392: sub tmpput {
3393: my ($storehash,$server,$context)=@_;
3394: my $items='';
3395: foreach my $item (keys(%$storehash)) {
3396: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3397: }
3398: $items=~s/\&$//;
3399: if (defined($context)) {
3400: $items .= ':'.&escape($context);
3401: }
3402: return &reply("tmpput:$items",$server);
3403: }
3404:
3405: # ------------------------------------------------------------ tmpget interface
3406: sub tmpget {
3407: my ($token,$server)=@_;
3408: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3409: my $rep=&reply("tmpget:$token",$server);
3410: my %returnhash;
3411: foreach my $item (split(/\&/,$rep)) {
3412: my ($key,$value)=split(/=/,$item);
3413: $returnhash{&unescape($key)}=&thaw_unescape($value);
3414: }
3415: return %returnhash;
3416: }
3417:
3418: # ------------------------------------------------------------ tmpget interface
3419: sub tmpdel {
3420: my ($token,$server)=@_;
3421: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3422: return &reply("tmpdel:$token",$server);
3423: }
3424:
3425: # -------------------------------------------------- portfolio access checking
3426:
3427: sub portfolio_access {
3428: my ($requrl) = @_;
3429: my (undef,$udom,$unum,$file_name,$group) = &parse_portfolio_url($requrl);
3430: my $result = &get_portfolio_access($udom,$unum,$file_name,$group);
3431: if ($result) {
3432: my %setters;
3433: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3434: my ($startblock,$endblock) =
3435: &Apache::loncommon::blockcheck(\%setters,'port',$unum,$udom);
3436: if ($startblock && $endblock) {
3437: return 'B';
3438: }
3439: } else {
3440: my ($startblock,$endblock) =
3441: &Apache::loncommon::blockcheck(\%setters,'port');
3442: if ($startblock && $endblock) {
3443: return 'B';
3444: }
3445: }
3446: }
3447: if ($result eq 'ok') {
3448: return 'F';
3449: } elsif ($result =~ /^[^:]+:guest_/) {
3450: return 'A';
3451: }
3452: return '';
3453: }
3454:
3455: sub get_portfolio_access {
3456: my ($udom,$unum,$file_name,$group,$access_hash) = @_;
3457:
3458: if (!ref($access_hash)) {
3459: my $current_perms = &get_portfile_permissions($udom,$unum);
3460: my %access_controls = &get_access_controls($current_perms,$group,
3461: $file_name);
3462: $access_hash = $access_controls{$file_name};
3463: }
3464:
3465: my ($public,$guest,@domains,@users,@courses,@groups);
3466: my $now = time;
3467: if (ref($access_hash) eq 'HASH') {
3468: foreach my $key (keys(%{$access_hash})) {
3469: my ($num,$scope,$end,$start) = ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
3470: if ($start > $now) {
3471: next;
3472: }
3473: if ($end && $end<$now) {
3474: next;
3475: }
3476: if ($scope eq 'public') {
3477: $public = $key;
3478: last;
3479: } elsif ($scope eq 'guest') {
3480: $guest = $key;
3481: } elsif ($scope eq 'domains') {
3482: push(@domains,$key);
3483: } elsif ($scope eq 'users') {
3484: push(@users,$key);
3485: } elsif ($scope eq 'course') {
3486: push(@courses,$key);
3487: } elsif ($scope eq 'group') {
3488: push(@groups,$key);
3489: }
3490: }
3491: if ($public) {
3492: return 'ok';
3493: }
3494: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3495: if ($guest) {
3496: return $guest;
3497: }
3498: } else {
3499: if (@domains > 0) {
3500: foreach my $domkey (@domains) {
3501: if (ref($access_hash->{$domkey}{'dom'}) eq 'ARRAY') {
3502: if (grep(/^\Q$env{'user.domain'}\E$/,@{$access_hash->{$domkey}{'dom'}})) {
3503: return 'ok';
3504: }
3505: }
3506: }
3507: }
3508: if (@users > 0) {
3509: foreach my $userkey (@users) {
3510: if (exists($access_hash->{$userkey}{'users'}{$env{'user.name'}.':'.$env{'user.domain'}})) {
3511: return 'ok';
3512: }
3513: }
3514: }
3515: my %roleshash;
3516: my @courses_and_groups = @courses;
3517: push(@courses_and_groups,@groups);
3518: if (@courses_and_groups > 0) {
3519: my (%allgroups,%allroles);
3520: my ($start,$end,$role,$sec,$group);
3521: foreach my $envkey (%env) {
3522: if ($envkey =~ m-^user\.role\.(gr|cc|in|ta|ep|st)\./($match_domain)/($match_courseid)/?([^/]*)$-) {
3523: my $cid = $2.'_'.$3;
3524: if ($1 eq 'gr') {
3525: $group = $4;
3526: $allgroups{$cid}{$group} = $env{$envkey};
3527: } else {
3528: if ($4 eq '') {
3529: $sec = 'none';
3530: } else {
3531: $sec = $4;
3532: }
3533: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3534: }
3535: } elsif ($envkey =~ m-^user\.role\./cr/($match_domain/$match_username/\w*)./($match_domain)/($match_courseid)/?([^/]*)$-) {
3536: my $cid = $2.'_'.$3;
3537: if ($4 eq '') {
3538: $sec = 'none';
3539: } else {
3540: $sec = $4;
3541: }
3542: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3543: }
3544: }
3545: if (keys(%allroles) == 0) {
3546: return;
3547: }
3548: foreach my $key (@courses_and_groups) {
3549: my %content = %{$$access_hash{$key}};
3550: my $cnum = $content{'number'};
3551: my $cdom = $content{'domain'};
3552: my $cid = $cdom.'_'.$cnum;
3553: if (!exists($allroles{$cid})) {
3554: next;
3555: }
3556: foreach my $role_id (keys(%{$content{'roles'}})) {
3557: my @sections = @{$content{'roles'}{$role_id}{'section'}};
3558: my @groups = @{$content{'roles'}{$role_id}{'group'}};
3559: my @status = @{$content{'roles'}{$role_id}{'access'}};
3560: my @roles = @{$content{'roles'}{$role_id}{'role'}};
3561: foreach my $role (keys(%{$allroles{$cid}})) {
3562: if ((grep/^all$/,@roles) || (grep/^\Q$role\E$/,@roles)) {
3563: foreach my $sec (keys(%{$allroles{$cid}{$role}})) {
3564: if (&course_group_datechecker($allroles{$cid}{$role}{$sec},$now,\@status) eq 'ok') {
3565: if (grep/^all$/,@sections) {
3566: return 'ok';
3567: } else {
3568: if (grep/^$sec$/,@sections) {
3569: return 'ok';
3570: }
3571: }
3572: }
3573: }
3574: if (keys(%{$allgroups{$cid}}) == 0) {
3575: if (grep/^none$/,@groups) {
3576: return 'ok';
3577: }
3578: } else {
3579: if (grep/^all$/,@groups) {
3580: return 'ok';
3581: }
3582: foreach my $group (keys(%{$allgroups{$cid}})) {
3583: if (grep/^$group$/,@groups) {
3584: return 'ok';
3585: }
3586: }
3587: }
3588: }
3589: }
3590: }
3591: }
3592: }
3593: if ($guest) {
3594: return $guest;
3595: }
3596: }
3597: }
3598: return;
3599: }
3600:
3601: sub course_group_datechecker {
3602: my ($dates,$now,$status) = @_;
3603: my ($start,$end) = split(/\./,$dates);
3604: if (!$start && !$end) {
3605: return 'ok';
3606: }
3607: if (grep/^active$/,@{$status}) {
3608: if (((!$start) || ($start && $start <= $now)) && ((!$end) || ($end && $end >= $now))) {
3609: return 'ok';
3610: }
3611: }
3612: if (grep/^previous$/,@{$status}) {
3613: if ($end > $now ) {
3614: return 'ok';
3615: }
3616: }
3617: if (grep/^future$/,@{$status}) {
3618: if ($start > $now) {
3619: return 'ok';
3620: }
3621: }
3622: return;
3623: }
3624:
3625: sub parse_portfolio_url {
3626: my ($url) = @_;
3627:
3628: my ($type,$udom,$unum,$group,$file_name);
3629:
3630: if ($url =~ m-^/*(?:uploaded|editupload)/($match_domain)/($match_username)/portfolio(/.+)$-) {
3631: $type = 1;
3632: $udom = $1;
3633: $unum = $2;
3634: $file_name = $3;
3635: } elsif ($url =~ m-^/*(?:uploaded|editupload)/($match_domain)/($match_courseid)/groups/([^/]+)/portfolio/(.+)$-) {
3636: $type = 2;
3637: $udom = $1;
3638: $unum = $2;
3639: $group = $3;
3640: $file_name = $3.'/'.$4;
3641: }
3642: if (wantarray) {
3643: return ($type,$udom,$unum,$file_name,$group);
3644: }
3645: return $type;
3646: }
3647:
3648: sub is_portfolio_url {
3649: my ($url) = @_;
3650: return scalar(&parse_portfolio_url($url));
3651: }
3652:
3653: sub is_portfolio_file {
3654: my ($file) = @_;
3655: if (($file =~ /^portfolio/) || ($file =~ /^groups\/\w+\/portfolio/)) {
3656: return 1;
3657: }
3658: return;
3659: }
3660:
3661:
3662: # ---------------------------------------------- Custom access rule evaluation
3663:
3664: sub customaccess {
3665: my ($priv,$uri)=@_;
3666: my ($urole,$urealm)=split(/\./,$env{'request.role'},2);
3667: my (undef,$udom,$ucrs,$usec)=split(/\//,$urealm);
3668: $udom = &LONCAPA::clean_domain($udom);
3669: $ucrs = &LONCAPA::clean_username($ucrs);
3670: my $access=0;
3671: foreach my $right (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
3672: my ($effect,$realm,$role)=split(/\:/,$right);
3673: if ($role) {
3674: if ($role ne $urole) { next; }
3675: }
3676: foreach my $scope (split(/\s*\,\s*/,$realm)) {
3677: my ($tdom,$tcrs,$tsec)=split(/\_/,$scope);
3678: if ($tdom) {
3679: if ($tdom ne $udom) { next; }
3680: }
3681: if ($tcrs) {
3682: if ($tcrs ne $ucrs) { next; }
3683: }
3684: if ($tsec) {
3685: if ($tsec ne $usec) { next; }
3686: }
3687: $access=($effect eq 'allow');
3688: last;
3689: }
3690: if ($realm eq '' && $role eq '') {
3691: $access=($effect eq 'allow');
3692: }
3693: }
3694: return $access;
3695: }
3696:
3697: # ------------------------------------------------- Check for a user privilege
3698:
3699: sub allowed {
3700: my ($priv,$uri,$symb,$role)=@_;
3701: my $ver_orguri=$uri;
3702: $uri=&deversion($uri);
3703: my $orguri=$uri;
3704: $uri=&declutter($uri);
3705:
3706: if ($priv eq 'evb') {
3707: # Evade communication block restrictions for specified role in a course
3708: if ($env{'user.priv.'.$role} =~/evb\&([^\:]*)/) {
3709: return $1;
3710: } else {
3711: return;
3712: }
3713: }
3714:
3715: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3716: # Free bre access to adm and meta resources
3717: if (((($uri=~/^adm\//) && ($uri !~ m{/(?:smppg|bulletinboard)$}))
3718: || (($uri=~/\.meta$/) && ($uri!~m|^uploaded/|) ))
3719: && ($priv eq 'bre')) {
3720: return 'F';
3721: }
3722:
3723: # Free bre access to user's own portfolio contents
3724: my ($space,$domain,$name,@dir)=split('/',$uri);
3725: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3726: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
3727: my %setters;
3728: my ($startblock,$endblock) =
3729: &Apache::loncommon::blockcheck(\%setters,'port');
3730: if ($startblock && $endblock) {
3731: return 'B';
3732: } else {
3733: return 'F';
3734: }
3735: }
3736:
3737: # bre access to group portfolio for rgf priv in group, or mdg or vcg in course.
3738: if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
3739: && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
3740: if (exists($env{'request.course.id'})) {
3741: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
3742: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
3743: if (($domain eq $cdom) && ($name eq $cnum)) {
3744: my $courseprivid=$env{'request.course.id'};
3745: $courseprivid=~s/\_/\//;
3746: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
3747: .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
3748: return $1;
3749: } else {
3750: if ($env{'request.course.sec'}) {
3751: $courseprivid.='/'.$env{'request.course.sec'};
3752: }
3753: if ($env{'user.priv.'.$env{'request.role'}.'./'.
3754: $courseprivid} =~/(mdg|vcg)\&([^\:]*)/) {
3755: return $2;
3756: }
3757: }
3758: }
3759: }
3760: }
3761:
3762: # Free bre to public access
3763:
3764: if ($priv eq 'bre') {
3765: my $copyright=&metadata($uri,'copyright');
3766: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3767: return 'F';
3768: }
3769: if ($copyright eq 'priv') {
3770: $uri=~/([^\/]+)\/([^\/]+)\//;
3771: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3772: return '';
3773: }
3774: }
3775: if ($copyright eq 'domain') {
3776: $uri=~/([^\/]+)\/([^\/]+)\//;
3777: unless (($env{'user.domain'} eq $1) ||
3778: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3779: return '';
3780: }
3781: }
3782: if ($env{'request.role'}=~ /li\.\//) {
3783: # Library role, so allow browsing of resources in this domain.
3784: return 'F';
3785: }
3786: if ($copyright eq 'custom') {
3787: unless (&customaccess($priv,$uri)) { return ''; }
3788: }
3789: }
3790: # Domain coordinator is trying to create a course
3791: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3792: # uri is the requested domain in this case.
3793: # comparison to 'request.role.domain' shows if the user has selected
3794: # a role of dc for the domain in question.
3795: return 'F' if ($uri eq $env{'request.role.domain'});
3796: }
3797:
3798: my $thisallowed='';
3799: my $statecond=0;
3800: my $courseprivid='';
3801:
3802: # Course
3803:
3804: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3805: $thisallowed.=$1;
3806: }
3807:
3808: # Domain
3809:
3810: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3811: =~/\Q$priv\E\&([^\:]*)/) {
3812: $thisallowed.=$1;
3813: }
3814:
3815: # Course: uri itself is a course
3816: my $courseuri=$uri;
3817: $courseuri=~s/\_(\d)/\/$1/;
3818: $courseuri=~s/^([^\/])/\/$1/;
3819:
3820: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3821: =~/\Q$priv\E\&([^\:]*)/) {
3822: $thisallowed.=$1;
3823: }
3824:
3825: # URI is an uploaded document for this course, default permissions don't matter
3826: # not allowing 'edit' access (editupload) to uploaded course docs
3827: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3828: $thisallowed='';
3829: my ($match)=&is_on_map($uri);
3830: if ($match) {
3831: if ($env{'user.priv.'.$env{'request.role'}.'./'}
3832: =~/\Q$priv\E\&([^\:]*)/) {
3833: $thisallowed.=$1;
3834: }
3835: } else {
3836: my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
3837: if ($refuri) {
3838: if ($refuri =~ m|^/adm/|) {
3839: $thisallowed='F';
3840: } else {
3841: $refuri=&declutter($refuri);
3842: my ($match) = &is_on_map($refuri);
3843: if ($match) {
3844: $thisallowed='F';
3845: }
3846: }
3847: }
3848: }
3849: }
3850:
3851: if ($priv eq 'bre'
3852: && $thisallowed ne 'F'
3853: && $thisallowed ne '2'
3854: && &is_portfolio_url($uri)) {
3855: $thisallowed = &portfolio_access($uri);
3856: }
3857:
3858: # Full access at system, domain or course-wide level? Exit.
3859:
3860: if ($thisallowed=~/F/) {
3861: return 'F';
3862: }
3863:
3864: # If this is generating or modifying users, exit with special codes
3865:
3866: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3867: if (($priv eq 'cca') || ($priv eq 'caa')) {
3868: my ($audom,$auname)=split('/',$uri);
3869: # no author name given, so this just checks on the general right to make a co-author in this domain
3870: unless ($auname) { return $thisallowed; }
3871: # an author name is given, so we are about to actually make a co-author for a certain account
3872: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3873: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3874: ($audom ne $env{'request.role.domain'}))) { return ''; }
3875: }
3876: return $thisallowed;
3877: }
3878: #
3879: # Gathered so far: system, domain and course wide privileges
3880: #
3881: # Course: See if uri or referer is an individual resource that is part of
3882: # the course
3883:
3884: if ($env{'request.course.id'}) {
3885:
3886: $courseprivid=$env{'request.course.id'};
3887: if ($env{'request.course.sec'}) {
3888: $courseprivid.='/'.$env{'request.course.sec'};
3889: }
3890: $courseprivid=~s/\_/\//;
3891: my $checkreferer=1;
3892: my ($match,$cond)=&is_on_map($uri);
3893: if ($match) {
3894: $statecond=$cond;
3895: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3896: =~/\Q$priv\E\&([^\:]*)/) {
3897: $thisallowed.=$1;
3898: $checkreferer=0;
3899: }
3900: }
3901:
3902: if ($checkreferer) {
3903: my $refuri=$env{'httpref.'.$orguri};
3904: unless ($refuri) {
3905: foreach my $key (keys(%env)) {
3906: if ($key=~/^httpref\..*\*/) {
3907: my $pattern=$key;
3908: $pattern=~s/^httpref\.\/res\///;
3909: $pattern=~s/\*/\[\^\/\]\+/g;
3910: $pattern=~s/\//\\\//g;
3911: if ($orguri=~/$pattern/) {
3912: $refuri=$env{$key};
3913: }
3914: }
3915: }
3916: }
3917:
3918: if ($refuri) {
3919: $refuri=&declutter($refuri);
3920: my ($match,$cond)=&is_on_map($refuri);
3921: if ($match) {
3922: my $refstatecond=$cond;
3923: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3924: =~/\Q$priv\E\&([^\:]*)/) {
3925: $thisallowed.=$1;
3926: $uri=$refuri;
3927: $statecond=$refstatecond;
3928: }
3929: }
3930: }
3931: }
3932: }
3933:
3934: #
3935: # Gathered now: all privileges that could apply, and condition number
3936: #
3937: #
3938: # Full or no access?
3939: #
3940:
3941: if ($thisallowed=~/F/) {
3942: return 'F';
3943: }
3944:
3945: unless ($thisallowed) {
3946: return '';
3947: }
3948:
3949: # Restrictions exist, deal with them
3950: #
3951: # C:according to course preferences
3952: # R:according to resource settings
3953: # L:unless locked
3954: # X:according to user session state
3955: #
3956:
3957: # Possibly locked functionality, check all courses
3958: # Locks might take effect only after 10 minutes cache expiration for other
3959: # courses, and 2 minutes for current course
3960:
3961: my $envkey;
3962: if ($thisallowed=~/L/) {
3963: foreach $envkey (keys %env) {
3964: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3965: my $courseid=$2;
3966: my $roleid=$1.'.'.$2;
3967: $courseid=~s/^\///;
3968: my $expiretime=600;
3969: if ($env{'request.role'} eq $roleid) {
3970: $expiretime=120;
3971: }
3972: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3973: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3974: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3975: &coursedescription($courseid,{'freshen_cache' => 1});
3976: }
3977: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3978: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3979: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3980: &log($env{'user.domain'},$env{'user.name'},
3981: $env{'user.home'},
3982: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3983: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3984: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3985: return '';
3986: }
3987: }
3988: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3989: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3990: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3991: &log($env{'user.domain'},$env{'user.name'},
3992: $env{'user.home'},
3993: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3994: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3995: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3996: return '';
3997: }
3998: }
3999: }
4000: }
4001: }
4002:
4003: #
4004: # Rest of the restrictions depend on selected course
4005: #
4006:
4007: unless ($env{'request.course.id'}) {
4008: if ($thisallowed eq 'A') {
4009: return 'A';
4010: } elsif ($thisallowed eq 'B') {
4011: return 'B';
4012: } else {
4013: return '1';
4014: }
4015: }
4016:
4017: #
4018: # Now user is definitely in a course
4019: #
4020:
4021:
4022: # Course preferences
4023:
4024: if ($thisallowed=~/C/) {
4025: my $rolecode=(split(/\./,$env{'request.role'}))[0];
4026: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
4027: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
4028: =~/\Q$rolecode\E/) {
4029: if ($priv ne 'pch') {
4030: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
4031: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
4032: $env{'request.course.id'});
4033: }
4034: return '';
4035: }
4036:
4037: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
4038: =~/\Q$unamedom\E/) {
4039: if ($priv ne 'pch') {
4040: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
4041: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
4042: $env{'request.course.id'});
4043: }
4044: return '';
4045: }
4046: }
4047:
4048: # Resource preferences
4049:
4050: if ($thisallowed=~/R/) {
4051: my $rolecode=(split(/\./,$env{'request.role'}))[0];
4052: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
4053: if ($priv ne 'pch') {
4054: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
4055: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
4056: }
4057: return '';
4058: }
4059: }
4060:
4061: # Restricted by state or randomout?
4062:
4063: if ($thisallowed=~/X/) {
4064: if ($env{'acc.randomout'}) {
4065: if (!$symb) { $symb=&symbread($uri,1); }
4066: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
4067: return '';
4068: }
4069: }
4070: if (&condval($statecond)) {
4071: return '2';
4072: } else {
4073: return '';
4074: }
4075: }
4076:
4077: if ($thisallowed eq 'A') {
4078: return 'A';
4079: } elsif ($thisallowed eq 'B') {
4080: return 'B';
4081: }
4082: return 'F';
4083: }
4084:
4085: sub split_uri_for_cond {
4086: my $uri=&deversion(&declutter(shift));
4087: my @uriparts=split(/\//,$uri);
4088: my $filename=pop(@uriparts);
4089: my $pathname=join('/',@uriparts);
4090: return ($pathname,$filename);
4091: }
4092: # --------------------------------------------------- Is a resource on the map?
4093:
4094: sub is_on_map {
4095: my ($pathname,$filename) = &split_uri_for_cond(shift);
4096: #Trying to find the conditional for the file
4097: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
4098: /\&\Q$filename\E\:([\d\|]+)\&/);
4099: if ($match) {
4100: return (1,$1);
4101: } else {
4102: return (0,0);
4103: }
4104: }
4105:
4106: # --------------------------------------------------------- Get symb from alias
4107:
4108: sub get_symb_from_alias {
4109: my $symb=shift;
4110: my ($map,$resid,$url)=&decode_symb($symb);
4111: # Already is a symb
4112: if ($url) { return $symb; }
4113: # Must be an alias
4114: my $aliassymb='';
4115: my %bighash;
4116: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4117: &GDBM_READER(),0640)) {
4118: my $rid=$bighash{'mapalias_'.$symb};
4119: if ($rid) {
4120: my ($mapid,$resid)=split(/\./,$rid);
4121: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
4122: $resid,$bighash{'src_'.$rid});
4123: }
4124: untie %bighash;
4125: }
4126: return $aliassymb;
4127: }
4128:
4129: # ----------------------------------------------------------------- Define Role
4130:
4131: sub definerole {
4132: if (allowed('mcr','/')) {
4133: my ($rolename,$sysrole,$domrole,$courole)=@_;
4134: foreach my $role (split(':',$sysrole)) {
4135: my ($crole,$cqual)=split(/\&/,$role);
4136: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
4137: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
4138: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
4139: return "refused:s:$crole&$cqual";
4140: }
4141: }
4142: }
4143: foreach my $role (split(':',$domrole)) {
4144: my ($crole,$cqual)=split(/\&/,$role);
4145: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
4146: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
4147: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
4148: return "refused:d:$crole&$cqual";
4149: }
4150: }
4151: }
4152: foreach my $role (split(':',$courole)) {
4153: my ($crole,$cqual)=split(/\&/,$role);
4154: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
4155: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
4156: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
4157: return "refused:c:$crole&$cqual";
4158: }
4159: }
4160: }
4161: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4162: "$env{'user.domain'}:$env{'user.name'}:".
4163: "rolesdef_$rolename=".
4164: escape($sysrole.'_'.$domrole.'_'.$courole);
4165: return reply($command,$env{'user.home'});
4166: } else {
4167: return 'refused';
4168: }
4169: }
4170:
4171: # ---------------- Make a metadata query against the network of library servers
4172:
4173: sub metadata_query {
4174: my ($query,$custom,$customshow,$server_array)=@_;
4175: my %rhash;
4176: my @server_list = (defined($server_array) ? @$server_array
4177: : keys(%libserv) );
4178: for my $server (@server_list) {
4179: unless ($custom or $customshow) {
4180: my $reply=&reply("querysend:".&escape($query),$server);
4181: $rhash{$server}=$reply;
4182: }
4183: else {
4184: my $reply=&reply("querysend:".&escape($query).':'.
4185: &escape($custom).':'.&escape($customshow),
4186: $server);
4187: $rhash{$server}=$reply;
4188: }
4189: }
4190: return \%rhash;
4191: }
4192:
4193: # ----------------------------------------- Send log queries and wait for reply
4194:
4195: sub log_query {
4196: my ($uname,$udom,$query,%filters)=@_;
4197: my $uhome=&homeserver($uname,$udom);
4198: if ($uhome eq 'no_host') { return 'error: no_host'; }
4199: my $uhost=&hostname($uhome);
4200: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys(%filters)));
4201: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
4202: $uhome);
4203: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
4204: return get_query_reply($queryid);
4205: }
4206:
4207: # -------------------------- Update MySQL table for portfolio file
4208:
4209: sub update_portfolio_table {
4210: my ($uname,$udom,$file_name,$query,$group,$action) = @_;
4211: my $homeserver = &homeserver($uname,$udom);
4212: my $queryid=
4213: &reply("querysend:".$query.':'.&escape($uname.':'.$udom.':'.$group).
4214: ':'.&escape($file_name).':'.$action,$homeserver);
4215: my $reply = &get_query_reply($queryid);
4216: return $reply;
4217: }
4218:
4219: # ------- Request retrieval of institutional classlists for course(s)
4220:
4221: sub fetch_enrollment_query {
4222: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
4223: my $homeserver;
4224: my $maxtries = 1;
4225: if ($context eq 'automated') {
4226: $homeserver = $perlvar{'lonHostID'};
4227: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
4228: } else {
4229: $homeserver = &homeserver($cnum,$dom);
4230: }
4231: my $host=&hostname($homeserver);
4232: my $cmd = '';
4233: foreach my $affiliate (keys %{$affiliatesref}) {
4234: $cmd .= $affiliate.'='.join(",",@{$$affiliatesref{$affiliate}}).'%%';
4235: }
4236: $cmd =~ s/%%$//;
4237: $cmd = &escape($cmd);
4238: my $query = 'fetchenrollment';
4239: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
4240: unless ($queryid=~/^\Q$host\E\_/) {
4241: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
4242: return 'error: '.$queryid;
4243: }
4244: my $reply = &get_query_reply($queryid);
4245: my $tries = 1;
4246: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4247: $reply = &get_query_reply($queryid);
4248: $tries ++;
4249: }
4250: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4251: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4252: } else {
4253: my @responses = split/:/,$reply;
4254: if ($homeserver eq $perlvar{'lonHostID'}) {
4255: foreach my $line (@responses) {
4256: my ($key,$value) = split(/=/,$line,2);
4257: $$replyref{$key} = $value;
4258: }
4259: } else {
4260: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
4261: foreach my $line (@responses) {
4262: my ($key,$value) = split(/=/,$line);
4263: $$replyref{$key} = $value;
4264: if ($value > 0) {
4265: foreach my $item (@{$$affiliatesref{$key}}) {
4266: my $filename = $dom.'_'.$key.'_'.$item.'_classlist.xml';
4267: my $destname = $pathname.'/'.$filename;
4268: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
4269: if ($xml_classlist =~ /^error/) {
4270: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
4271: } else {
4272: if ( open(FILE,">$destname") ) {
4273: print FILE &unescape($xml_classlist);
4274: close(FILE);
4275: } else {
4276: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
4277: }
4278: }
4279: }
4280: }
4281: }
4282: }
4283: return 'ok';
4284: }
4285: return 'error';
4286: }
4287:
4288: sub get_query_reply {
4289: my $queryid=shift;
4290: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
4291: my $reply='';
4292: for (1..100) {
4293: sleep 2;
4294: if (-e $replyfile.'.end') {
4295: if (open(my $fh,$replyfile)) {
4296: $reply.=<$fh>;
4297: close($fh);
4298: } else { return 'error: reply_file_error'; }
4299: return &unescape($reply);
4300: }
4301: }
4302: return 'timeout:'.$queryid;
4303: }
4304:
4305: sub courselog_query {
4306: #
4307: # possible filters:
4308: # url: url or symb
4309: # username
4310: # domain
4311: # action: view, submit, grade
4312: # start: timestamp
4313: # end: timestamp
4314: #
4315: my (%filters)=@_;
4316: unless ($env{'request.course.id'}) { return 'no_course'; }
4317: if ($filters{'url'}) {
4318: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
4319: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
4320: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
4321: }
4322: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
4323: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
4324: return &log_query($cname,$cdom,'courselog',%filters);
4325: }
4326:
4327: sub userlog_query {
4328: my ($uname,$udom,%filters)=@_;
4329: return &log_query($uname,$udom,'userlog',%filters);
4330: }
4331:
4332: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
4333:
4334: sub auto_run {
4335: my ($cnum,$cdom) = @_;
4336: my $homeserver = &homeserver($cnum,$cdom);
4337: my $response = &reply('autorun:'.$cdom,$homeserver);
4338: return $response;
4339: }
4340:
4341: sub auto_get_sections {
4342: my ($cnum,$cdom,$inst_coursecode) = @_;
4343: my $homeserver = &homeserver($cnum,$cdom);
4344: my @secs = ();
4345: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
4346: unless ($response eq 'refused') {
4347: @secs = split/:/,$response;
4348: }
4349: return @secs;
4350: }
4351:
4352: sub auto_new_course {
4353: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
4354: my $homeserver = &homeserver($cnum,$cdom);
4355: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
4356: return $response;
4357: }
4358:
4359: sub auto_validate_courseID {
4360: my ($cnum,$cdom,$inst_course_id) = @_;
4361: my $homeserver = &homeserver($cnum,$cdom);
4362: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
4363: return $response;
4364: }
4365:
4366: sub auto_create_password {
4367: my ($cnum,$cdom,$authparam) = @_;
4368: my $homeserver = &homeserver($cnum,$cdom);
4369: my $create_passwd = 0;
4370: my $authchk = '';
4371: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
4372: if ($response eq 'refused') {
4373: $authchk = 'refused';
4374: } else {
4375: ($authparam,$create_passwd,$authchk) = split/:/,$response;
4376: }
4377: return ($authparam,$create_passwd,$authchk);
4378: }
4379:
4380: sub auto_photo_permission {
4381: my ($cnum,$cdom,$students) = @_;
4382: my $homeserver = &homeserver($cnum,$cdom);
4383: my ($outcome,$perm_reqd,$conditions) =
4384: split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
4385: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4386: return (undef,undef);
4387: }
4388: return ($outcome,$perm_reqd,$conditions);
4389: }
4390:
4391: sub auto_checkphotos {
4392: my ($uname,$udom,$pid) = @_;
4393: my $homeserver = &homeserver($uname,$udom);
4394: my ($result,$resulttype);
4395: my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
4396: &escape($uname).':'.&escape($pid),
4397: $homeserver));
4398: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4399: return (undef,undef);
4400: }
4401: if ($outcome) {
4402: ($result,$resulttype) = split(/:/,$outcome);
4403: }
4404: return ($result,$resulttype);
4405: }
4406:
4407: sub auto_photochoice {
4408: my ($cnum,$cdom) = @_;
4409: my $homeserver = &homeserver($cnum,$cdom);
4410: my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
4411: &escape($cdom),
4412: $homeserver)));
4413: if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4414: return (undef,undef);
4415: }
4416: return ($update,$comment);
4417: }
4418:
4419: sub auto_photoupdate {
4420: my ($affiliatesref,$dom,$cnum,$photo) = @_;
4421: my $homeserver = &homeserver($cnum,$dom);
4422: my $host=&hostname($homeserver);
4423: my $cmd = '';
4424: my $maxtries = 1;
4425: foreach my $affiliate (keys(%{$affiliatesref})) {
4426: $cmd .= $affiliate.'='.join(",",@{$$affiliatesref{$affiliate}}).'%%';
4427: }
4428: $cmd =~ s/%%$//;
4429: $cmd = &escape($cmd);
4430: my $query = 'institutionalphotos';
4431: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
4432: unless ($queryid=~/^\Q$host\E\_/) {
4433: &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
4434: return 'error: '.$queryid;
4435: }
4436: my $reply = &get_query_reply($queryid);
4437: my $tries = 1;
4438: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4439: $reply = &get_query_reply($queryid);
4440: $tries ++;
4441: }
4442: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4443: &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4444: } else {
4445: my @responses = split(/:/,$reply);
4446: my $outcome = shift(@responses);
4447: foreach my $item (@responses) {
4448: my ($key,$value) = split(/=/,$item);
4449: $$photo{$key} = $value;
4450: }
4451: return $outcome;
4452: }
4453: return 'error';
4454: }
4455:
4456: sub auto_instcode_format {
4457: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,
4458: $cat_order) = @_;
4459: my $courses = '';
4460: my @homeservers;
4461: if ($caller eq 'global') {
4462: foreach my $tryserver (keys(%libserv)) {
4463: if ($hostdom{$tryserver} eq $codedom) {
4464: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4465: push(@homeservers,$tryserver);
4466: }
4467: }
4468: }
4469: } else {
4470: push(@homeservers,&homeserver($caller,$codedom));
4471: }
4472: foreach my $code (keys(%{$instcodes})) {
4473: $courses .= &escape($code).'='.&escape($$instcodes{$code}).'&';
4474: }
4475: chop($courses);
4476: my $ok_response = 0;
4477: my $response;
4478: while (@homeservers > 0 && $ok_response == 0) {
4479: my $server = shift(@homeservers);
4480: $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$server);
4481: if ($response !~ /(con_lost|error|no_such_host|refused)/) {
4482: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) =
4483: split/:/,$response;
4484: %{$codes} = (%{$codes},&str2hash($codes_str));
4485: push(@{$codetitles},&str2array($codetitles_str));
4486: %{$cat_titles} = (%{$cat_titles},&str2hash($cat_titles_str));
4487: %{$cat_order} = (%{$cat_order},&str2hash($cat_order_str));
4488: $ok_response = 1;
4489: }
4490: }
4491: if ($ok_response) {
4492: return 'ok';
4493: } else {
4494: return $response;
4495: }
4496: }
4497:
4498: sub auto_instcode_defaults {
4499: my ($domain,$returnhash,$code_order) = @_;
4500: my @homeservers;
4501: foreach my $tryserver (keys(%libserv)) {
4502: if ($hostdom{$tryserver} eq $domain) {
4503: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4504: push(@homeservers,$tryserver);
4505: }
4506: }
4507: }
4508: my $ok_response = 0;
4509: my $response;
4510: while (@homeservers > 0 && $ok_response == 0) {
4511: my $server = shift(@homeservers);
4512: $response=&reply('autoinstcodedefaults:'.$domain,$server);
4513: if ($response !~ /(con_lost|error|no_such_host|refused)/) {
4514: foreach my $pair (split(/\&/,$response)) {
4515: my ($name,$value)=split(/\=/,$pair);
4516: if ($name eq 'code_order') {
4517: @{$code_order} = split(/\&/,&unescape($value));
4518: } else {
4519: $returnhash->{&unescape($name)}=&unescape($value);
4520: }
4521: }
4522: $ok_response = 1;
4523: }
4524: }
4525: if ($ok_response) {
4526: return 'ok';
4527: } else {
4528: return $response;
4529: }
4530: }
4531:
4532: sub auto_validate_class_sec {
4533: my ($cdom,$cnum,$owner,$inst_class) = @_;
4534: my $homeserver = &homeserver($cnum,$cdom);
4535: my $response=&reply('autovalidateclass_sec:'.$inst_class.':'.
4536: &escape($owner).':'.$cdom,$homeserver);
4537: return $response;
4538: }
4539:
4540: # ------------------------------------------------------- Course Group routines
4541:
4542: sub get_coursegroups {
4543: my ($cdom,$cnum,$group,$namespace) = @_;
4544: return(&dump($namespace,$cdom,$cnum,$group));
4545: }
4546:
4547: sub modify_coursegroup {
4548: my ($cdom,$cnum,$groupsettings) = @_;
4549: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
4550: }
4551:
4552: sub toggle_coursegroup_status {
4553: my ($cdom,$cnum,$group,$action) = @_;
4554: my ($from_namespace,$to_namespace);
4555: if ($action eq 'delete') {
4556: $from_namespace = 'coursegroups';
4557: $to_namespace = 'deleted_groups';
4558: } else {
4559: $from_namespace = 'deleted_groups';
4560: $to_namespace = 'coursegroups';
4561: }
4562: my %curr_group = &get_coursegroups($cdom,$cnum,$group,$from_namespace);
4563: if (my $tmp = &error(%curr_group)) {
4564: &Apache::lonnet::logthis('Error retrieving group: '.$tmp.' in '.$cnum.':'.$cdom);
4565: return ('read error',$tmp);
4566: } else {
4567: my %savedsettings = %curr_group;
4568: my $result = &put($to_namespace,\%savedsettings,$cdom,$cnum);
4569: my $deloutcome;
4570: if ($result eq 'ok') {
4571: $deloutcome = &del($from_namespace,[$group],$cdom,$cnum);
4572: } else {
4573: return ('write error',$result);
4574: }
4575: if ($deloutcome eq 'ok') {
4576: return 'ok';
4577: } else {
4578: return ('delete error',$deloutcome);
4579: }
4580: }
4581: }
4582:
4583: sub modify_group_roles {
4584: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
4585: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
4586: my $role = 'gr/'.&escape($userprivs);
4587: my ($uname,$udom) = split(/:/,$user);
4588: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
4589: if ($result eq 'ok') {
4590: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
4591: }
4592: return $result;
4593: }
4594:
4595: sub modify_coursegroup_membership {
4596: my ($cdom,$cnum,$membership) = @_;
4597: my $result = &put('groupmembership',$membership,$cdom,$cnum);
4598: return $result;
4599: }
4600:
4601: sub get_active_groups {
4602: my ($udom,$uname,$cdom,$cnum) = @_;
4603: my $now = time;
4604: my %groups = ();
4605: foreach my $key (keys(%env)) {
4606: if ($key =~ m-user\.role\.gr\./($match_domain)/($match_courseid)/(\w+)$-) {
4607: my ($start,$end) = split(/\./,$env{$key});
4608: if (($end!=0) && ($end<$now)) { next; }
4609: if (($start!=0) && ($start>$now)) { next; }
4610: if ($1 eq $cdom && $2 eq $cnum) {
4611: $groups{$3} = $env{$key} ;
4612: }
4613: }
4614: }
4615: return %groups;
4616: }
4617:
4618: sub get_group_membership {
4619: my ($cdom,$cnum,$group) = @_;
4620: return(&dump('groupmembership',$cdom,$cnum,$group));
4621: }
4622:
4623: sub get_users_groups {
4624: my ($udom,$uname,$courseid) = @_;
4625: my @usersgroups;
4626: my $cachetime=1800;
4627:
4628: my $hashid="$udom:$uname:$courseid";
4629: my ($grouplist,$cached)=&is_cached_new('getgroups',$hashid);
4630: if (defined($cached)) {
4631: @usersgroups = split(/:/,$grouplist);
4632: } else {
4633: $grouplist = '';
4634: my $courseurl = &courseid_to_courseurl($courseid);
4635: my %roleshash = &dump('roles',$udom,$uname,$courseurl);
4636: my $access_end = $env{'course.'.$courseid.
4637: '.default_enrollment_end_date'};
4638: my $now = time;
4639: foreach my $key (keys(%roleshash)) {
4640: if ($key =~ /^\Q$courseurl\E\/(\w+)\_gr$/) {
4641: my $group = $1;
4642: if ($roleshash{$key} =~ /_(\d+)_(\d+)$/) {
4643: my $start = $2;
4644: my $end = $1;
4645: if ($start == -1) { next; } # deleted from group
4646: if (($start!=0) && ($start>$now)) { next; }
4647: if (($end!=0) && ($end<$now)) {
4648: if ($access_end && $access_end < $now) {
4649: if ($access_end - $end < 86400) {
4650: push(@usersgroups,$group);
4651: }
4652: }
4653: next;
4654: }
4655: push(@usersgroups,$group);
4656: }
4657: }
4658: }
4659: @usersgroups = &sort_course_groups($courseid,@usersgroups);
4660: $grouplist = join(':',@usersgroups);
4661: &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
4662: }
4663: return @usersgroups;
4664: }
4665:
4666: sub devalidate_getgroups_cache {
4667: my ($udom,$uname,$cdom,$cnum)=@_;
4668: my $courseid = $cdom.'_'.$cnum;
4669:
4670: my $hashid="$udom:$uname:$courseid";
4671: &devalidate_cache_new('getgroups',$hashid);
4672: }
4673:
4674: # ------------------------------------------------------------------ Plain Text
4675:
4676: sub plaintext {
4677: my ($short,$type,$cid) = @_;
4678: if ($short =~ /^cr/) {
4679: return (split('/',$short))[-1];
4680: }
4681: if (!defined($cid)) {
4682: $cid = $env{'request.course.id'};
4683: }
4684: if (defined($cid) && defined($env{'course.'.$cid.'.'.$short.'.plaintext'})) {
4685: return &Apache::lonlocal::mt($env{'course.'.$cid.'.'.$short.
4686: '.plaintext'});
4687: }
4688: my %rolenames = (
4689: Course => 'std',
4690: Group => 'alt1',
4691: );
4692: if (defined($type) &&
4693: defined($rolenames{$type}) &&
4694: defined($prp{$short}{$rolenames{$type}})) {
4695: return &Apache::lonlocal::mt($prp{$short}{$rolenames{$type}});
4696: } else {
4697: return &Apache::lonlocal::mt($prp{$short}{'std'});
4698: }
4699: }
4700:
4701: # ----------------------------------------------------------------- Assign Role
4702:
4703: sub assignrole {
4704: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
4705: my $mrole;
4706: if ($role =~ /^cr\//) {
4707: my $cwosec=$url;
4708: $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
4709: unless (&allowed('ccr',$cwosec)) {
4710: &logthis('Refused custom assignrole: '.
4711: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4712: $env{'user.name'}.' at '.$env{'user.domain'});
4713: return 'refused';
4714: }
4715: $mrole='cr';
4716: } elsif ($role =~ /^gr\//) {
4717: my $cwogrp=$url;
4718: $cwogrp=~s{^/($match_domain)/($match_courseid)/.*}{$1/$2};
4719: unless (&allowed('mdg',$cwogrp)) {
4720: &logthis('Refused group assignrole: '.
4721: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4722: $env{'user.name'}.' at '.$env{'user.domain'});
4723: return 'refused';
4724: }
4725: $mrole='gr';
4726: } else {
4727: my $cwosec=$url;
4728: $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
4729: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
4730: &logthis('Refused assignrole: '.
4731: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4732: $env{'user.name'}.' at '.$env{'user.domain'});
4733: return 'refused';
4734: }
4735: $mrole=$role;
4736: }
4737: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4738: "$udom:$uname:$url".'_'."$mrole=$role";
4739: if ($end) { $command.='_'.$end; }
4740: if ($start) {
4741: if ($end) {
4742: $command.='_'.$start;
4743: } else {
4744: $command.='_0_'.$start;
4745: }
4746: }
4747: my $origstart = $start;
4748: my $origend = $end;
4749: # actually delete
4750: if ($deleteflag) {
4751: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
4752: # modify command to delete the role
4753: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
4754: "$udom:$uname:$url".'_'."$mrole";
4755: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
4756: # set start and finish to negative values for userrolelog
4757: $start=-1;
4758: $end=-1;
4759: }
4760: }
4761: # send command
4762: my $answer=&reply($command,&homeserver($uname,$udom));
4763: # log new user role if status is ok
4764: if ($answer eq 'ok') {
4765: &userrolelog($role,$uname,$udom,$url,$start,$end);
4766: # for course roles, perform group memberships changes triggered by role change.
4767: unless ($role =~ /^gr/) {
4768: &Apache::longroup::group_changes($udom,$uname,$url,$role,$origend,
4769: $origstart);
4770: }
4771: }
4772: return $answer;
4773: }
4774:
4775: # -------------------------------------------------- Modify user authentication
4776: # Overrides without validation
4777:
4778: sub modifyuserauth {
4779: my ($udom,$uname,$umode,$upass)=@_;
4780: my $uhome=&homeserver($uname,$udom);
4781: unless (&allowed('mau',$udom)) { return 'refused'; }
4782: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
4783: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4784: ' in domain '.$env{'request.role.domain'});
4785: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
4786: &escape($upass),$uhome);
4787: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
4788: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
4789: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4790: &log($udom,,$uname,$uhome,
4791: 'Authentication changed by '.$env{'user.domain'}.', '.
4792: $env{'user.name'}.', '.$umode.
4793: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4794: unless ($reply eq 'ok') {
4795: &logthis('Authentication mode error: '.$reply);
4796: return 'error: '.$reply;
4797: }
4798: return 'ok';
4799: }
4800:
4801: # --------------------------------------------------------------- Modify a user
4802:
4803: sub modifyuser {
4804: my ($udom, $uname, $uid,
4805: $umode, $upass, $first,
4806: $middle, $last, $gene,
4807: $forceid, $desiredhome, $email)=@_;
4808: $udom= &LONCAPA::clean_domain($udom);
4809: $uname=&LONCAPA::clean_username($uname);
4810: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
4811: $umode.', '.$first.', '.$middle.', '.
4812: $last.', '.$gene.'(forceid: '.$forceid.')'.
4813: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
4814: ' desiredhome not specified').
4815: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4816: ' in domain '.$env{'request.role.domain'});
4817: my $uhome=&homeserver($uname,$udom,'true');
4818: # ----------------------------------------------------------------- Create User
4819: if (($uhome eq 'no_host') &&
4820: (($umode && $upass) || ($umode eq 'localauth'))) {
4821: my $unhome='';
4822: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
4823: $unhome = $desiredhome;
4824: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
4825: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
4826: } else { # load balancing routine for determining $unhome
4827: my $tryserver;
4828: my $loadm=10000000;
4829: foreach $tryserver (keys %libserv) {
4830: if ($hostdom{$tryserver} eq $udom) {
4831: my $answer=reply('load',$tryserver);
4832: if (($answer=~/\d+/) && ($answer<$loadm)) {
4833: $loadm=$answer;
4834: $unhome=$tryserver;
4835: }
4836: }
4837: }
4838: }
4839: if (($unhome eq '') || ($unhome eq 'no_host')) {
4840: return 'error: unable to find a home server for '.$uname.
4841: ' in domain '.$udom;
4842: }
4843: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
4844: &escape($upass),$unhome);
4845: unless ($reply eq 'ok') {
4846: return 'error: '.$reply;
4847: }
4848: $uhome=&homeserver($uname,$udom,'true');
4849: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
4850: return 'error: unable verify users home machine.';
4851: }
4852: } # End of creation of new user
4853: # ---------------------------------------------------------------------- Add ID
4854: if ($uid) {
4855: $uid=~tr/A-Z/a-z/;
4856: my %uidhash=&idrget($udom,$uname);
4857: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
4858: && (!$forceid)) {
4859: unless ($uid eq $uidhash{$uname}) {
4860: return 'error: user id "'.$uid.'" does not match '.
4861: 'current user id "'.$uidhash{$uname}.'".';
4862: }
4863: } else {
4864: &idput($udom,($uname => $uid));
4865: }
4866: }
4867: # -------------------------------------------------------------- Add names, etc
4868: my @tmp=&get('environment',
4869: ['firstname','middlename','lastname','generation'],
4870: $udom,$uname);
4871: my %names;
4872: if ($tmp[0] =~ m/^error:.*/) {
4873: %names=();
4874: } else {
4875: %names = @tmp;
4876: }
4877: #
4878: # Make sure to not trash student environment if instructor does not bother
4879: # to supply name and email information
4880: #
4881: if ($first) { $names{'firstname'} = $first; }
4882: if (defined($middle)) { $names{'middlename'} = $middle; }
4883: if ($last) { $names{'lastname'} = $last; }
4884: if (defined($gene)) { $names{'generation'} = $gene; }
4885: if ($email) {
4886: $email=~s/[^\w\@\.\-\,]//gs;
4887: if ($email=~/\@/) { $names{'notification'} = $email;
4888: $names{'critnotification'} = $email;
4889: $names{'permanentemail'} = $email; }
4890: }
4891: my $reply = &put('environment', \%names, $udom,$uname);
4892: if ($reply ne 'ok') { return 'error: '.$reply; }
4893: &devalidate_cache_new('namescache',$uname.':'.$udom);
4894: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
4895: $umode.', '.$first.', '.$middle.', '.
4896: $last.', '.$gene.' by '.
4897: $env{'user.name'}.' at '.$env{'user.domain'});
4898: return 'ok';
4899: }
4900:
4901: # -------------------------------------------------------------- Modify student
4902:
4903: sub modifystudent {
4904: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
4905: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
4906: if (!$cid) {
4907: unless ($cid=$env{'request.course.id'}) {
4908: return 'not_in_class';
4909: }
4910: }
4911: # --------------------------------------------------------------- Make the user
4912: my $reply=&modifyuser
4913: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
4914: $desiredhome,$email);
4915: unless ($reply eq 'ok') { return $reply; }
4916: # This will cause &modify_student_enrollment to get the uid from the
4917: # students environment
4918: $uid = undef if (!$forceid);
4919: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
4920: $gene,$usec,$end,$start,$type,$locktype,$cid);
4921: return $reply;
4922: }
4923:
4924: sub modify_student_enrollment {
4925: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
4926: my ($cdom,$cnum,$chome);
4927: if (!$cid) {
4928: unless ($cid=$env{'request.course.id'}) {
4929: return 'not_in_class';
4930: }
4931: $cdom=$env{'course.'.$cid.'.domain'};
4932: $cnum=$env{'course.'.$cid.'.num'};
4933: } else {
4934: ($cdom,$cnum)=split(/_/,$cid);
4935: }
4936: $chome=$env{'course.'.$cid.'.home'};
4937: if (!$chome) {
4938: $chome=&homeserver($cnum,$cdom);
4939: }
4940: if (!$chome) { return 'unknown_course'; }
4941: # Make sure the user exists
4942: my $uhome=&homeserver($uname,$udom);
4943: if (($uhome eq '') || ($uhome eq 'no_host')) {
4944: return 'error: no such user';
4945: }
4946: # Get student data if we were not given enough information
4947: if (!defined($first) || $first eq '' ||
4948: !defined($last) || $last eq '' ||
4949: !defined($uid) || $uid eq '' ||
4950: !defined($middle) || $middle eq '' ||
4951: !defined($gene) || $gene eq '') {
4952: # They did not supply us with enough data to enroll the student, so
4953: # we need to pick up more information.
4954: my %tmp = &get('environment',
4955: ['firstname','middlename','lastname', 'generation','id']
4956: ,$udom,$uname);
4957:
4958: #foreach my $key (keys(%tmp)) {
4959: # &logthis("key $key = ".$tmp{$key});
4960: #}
4961: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
4962: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
4963: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
4964: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
4965: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
4966: }
4967: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
4968: my $reply=cput('classlist',
4969: {"$uname:$udom" =>
4970: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
4971: $cdom,$cnum);
4972: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
4973: return 'error: '.$reply;
4974: } else {
4975: &devalidate_getsection_cache($udom,$uname,$cid);
4976: }
4977: # Add student role to user
4978: my $uurl='/'.$cid;
4979: $uurl=~s/\_/\//g;
4980: if ($usec) {
4981: $uurl.='/'.$usec;
4982: }
4983: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
4984: }
4985:
4986: sub format_name {
4987: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
4988: my $name;
4989: if ($first ne 'lastname') {
4990: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
4991: } else {
4992: if ($lastname=~/\S/) {
4993: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
4994: $name=~s/\s+,/,/;
4995: } else {
4996: $name.= $firstname.' '.$middlename.' '.$generation;
4997: }
4998: }
4999: $name=~s/^\s+//;
5000: $name=~s/\s+$//;
5001: $name=~s/\s+/ /g;
5002: return $name;
5003: }
5004:
5005: # ------------------------------------------------- Write to course preferences
5006:
5007: sub writecoursepref {
5008: my ($courseid,%prefs)=@_;
5009: $courseid=~s/^\///;
5010: $courseid=~s/\_/\//g;
5011: my ($cdomain,$cnum)=split(/\//,$courseid);
5012: my $chome=homeserver($cnum,$cdomain);
5013: if (($chome eq '') || ($chome eq 'no_host')) {
5014: return 'error: no such course';
5015: }
5016: my $cstring='';
5017: foreach my $pref (keys(%prefs)) {
5018: $cstring.=&escape($pref).'='.&escape($prefs{$pref}).'&';
5019: }
5020: $cstring=~s/\&$//;
5021: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
5022: }
5023:
5024: # ---------------------------------------------------------- Make/modify course
5025:
5026: sub createcourse {
5027: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,
5028: $course_owner,$crstype)=@_;
5029: $url=&declutter($url);
5030: my $cid='';
5031: unless (&allowed('ccc',$udom)) {
5032: return 'refused';
5033: }
5034: # ------------------------------------------------------------------- Create ID
5035: my $uname=int(1+rand(9)).
5036: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
5037: substr($$.time,0,5).unpack("H8",pack("I32",time)).
5038: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
5039: # ----------------------------------------------- Make sure that does not exist
5040: my $uhome=&homeserver($uname,$udom,'true');
5041: unless (($uhome eq '') || ($uhome eq 'no_host')) {
5042: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
5043: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
5044: $uhome=&homeserver($uname,$udom,'true');
5045: unless (($uhome eq '') || ($uhome eq 'no_host')) {
5046: return 'error: unable to generate unique course-ID';
5047: }
5048: }
5049: # ------------------------------------------------ Check supplied server name
5050: $course_server = $env{'user.homeserver'} if (! defined($course_server));
5051: if (! exists($libserv{$course_server})) {
5052: return 'error:bad server name '.$course_server;
5053: }
5054: # ------------------------------------------------------------- Make the course
5055: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
5056: $course_server);
5057: unless ($reply eq 'ok') { return 'error: '.$reply; }
5058: $uhome=&homeserver($uname,$udom,'true');
5059: if (($uhome eq '') || ($uhome eq 'no_host')) {
5060: return 'error: no such course';
5061: }
5062: # ----------------------------------------------------------------- Course made
5063: # log existence
5064: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
5065: ':'.&escape($inst_code).':'.&escape($course_owner).':'.
5066: &escape($crstype),$uhome);
5067: &flushcourselogs();
5068: # set toplevel url
5069: my $topurl=$url;
5070: unless ($nonstandard) {
5071: # ------------------------------------------ For standard courses, make top url
5072: my $mapurl=&clutter($url);
5073: if ($mapurl eq '/res/') { $mapurl=''; }
5074: $env{'form.initmap'}=(<<ENDINITMAP);
5075: <map>
5076: <resource id="1" type="start"></resource>
5077: <resource id="2" src="$mapurl"></resource>
5078: <resource id="3" type="finish"></resource>
5079: <link index="1" from="1" to="2"></link>
5080: <link index="2" from="2" to="3"></link>
5081: </map>
5082: ENDINITMAP
5083: $topurl=&declutter(
5084: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
5085: );
5086: }
5087: # ----------------------------------------------------------- Write preferences
5088: &writecoursepref($udom.'_'.$uname,
5089: ('description' => $description,
5090: 'url' => $topurl));
5091: return '/'.$udom.'/'.$uname;
5092: }
5093:
5094: sub is_course {
5095: my ($cdom,$cnum) = @_;
5096: my %courses = &courseiddump($cdom,'.',1,'.','.',$cnum,undef,
5097: undef,'.');
5098: if (exists($courses{$cdom.'_'.$cnum})) {
5099: return 1;
5100: }
5101: return 0;
5102: }
5103:
5104: # ---------------------------------------------------------- Assign Custom Role
5105:
5106: sub assigncustomrole {
5107: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
5108: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
5109: $end,$start,$deleteflag);
5110: }
5111:
5112: # ----------------------------------------------------------------- Revoke Role
5113:
5114: sub revokerole {
5115: my ($udom,$uname,$url,$role,$deleteflag)=@_;
5116: my $now=time;
5117: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
5118: }
5119:
5120: # ---------------------------------------------------------- Revoke Custom Role
5121:
5122: sub revokecustomrole {
5123: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
5124: my $now=time;
5125: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
5126: $deleteflag);
5127: }
5128:
5129: # ------------------------------------------------------------ Disk usage
5130: sub diskusage {
5131: my ($udom,$uname,$directoryRoot)=@_;
5132: $directoryRoot =~ s/\/$//;
5133: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
5134: return $listing;
5135: }
5136:
5137: sub is_locked {
5138: my ($file_name, $domain, $user) = @_;
5139: my @check;
5140: my $is_locked;
5141: push @check, $file_name;
5142: my %locked = &get('file_permissions',\@check,
5143: $env{'user.domain'},$env{'user.name'});
5144: my ($tmp)=keys(%locked);
5145: if ($tmp=~/^error:/) { undef(%locked); }
5146:
5147: if (ref($locked{$file_name}) eq 'ARRAY') {
5148: $is_locked = 'false';
5149: foreach my $entry (@{$locked{$file_name}}) {
5150: if (ref($entry) eq 'ARRAY') {
5151: $is_locked = 'true';
5152: last;
5153: }
5154: }
5155: } else {
5156: $is_locked = 'false';
5157: }
5158: }
5159:
5160: sub declutter_portfile {
5161: my ($file) = @_;
5162: $file =~ s{^(/portfolio/|portfolio/)}{/};
5163: return $file;
5164: }
5165:
5166: # ------------------------------------------------------------- Mark as Read Only
5167:
5168: sub mark_as_readonly {
5169: my ($domain,$user,$files,$what) = @_;
5170: my %current_permissions = &dump('file_permissions',$domain,$user);
5171: my ($tmp)=keys(%current_permissions);
5172: if ($tmp=~/^error:/) { undef(%current_permissions); }
5173: foreach my $file (@{$files}) {
5174: $file = &declutter_portfile($file);
5175: push(@{$current_permissions{$file}},$what);
5176: }
5177: &put('file_permissions',\%current_permissions,$domain,$user);
5178: return;
5179: }
5180:
5181: # ------------------------------------------------------------Save Selected Files
5182:
5183: sub save_selected_files {
5184: my ($user, $path, @files) = @_;
5185: my $filename = $user."savedfiles";
5186: my @other_files = &files_not_in_path($user, $path);
5187: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5188: foreach my $file (@files) {
5189: print (OUT $env{'form.currentpath'}.$file."\n");
5190: }
5191: foreach my $file (@other_files) {
5192: print (OUT $file."\n");
5193: }
5194: close (OUT);
5195: return 'ok';
5196: }
5197:
5198: sub clear_selected_files {
5199: my ($user) = @_;
5200: my $filename = $user."savedfiles";
5201: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5202: print (OUT undef);
5203: close (OUT);
5204: return ("ok");
5205: }
5206:
5207: sub files_in_path {
5208: my ($user, $path) = @_;
5209: my $filename = $user."savedfiles";
5210: my %return_files;
5211: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5212: while (my $line_in = <IN>) {
5213: chomp ($line_in);
5214: my @paths_and_file = split (m!/!, $line_in);
5215: my $file_part = pop (@paths_and_file);
5216: my $path_part = join ('/', @paths_and_file);
5217: $path_part.='/';
5218: my $path_and_file = $path_part.$file_part;
5219: if ($path_part eq $path) {
5220: $return_files{$file_part}= 'selected';
5221: }
5222: }
5223: close (IN);
5224: return (\%return_files);
5225: }
5226:
5227: # called in portfolio select mode, to show files selected NOT in current directory
5228: sub files_not_in_path {
5229: my ($user, $path) = @_;
5230: my $filename = $user."savedfiles";
5231: my @return_files;
5232: my $path_part;
5233: open(IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5234: while (my $line = <IN>) {
5235: #ok, I know it's clunky, but I want it to work
5236: my @paths_and_file = split(m|/|, $line);
5237: my $file_part = pop(@paths_and_file);
5238: chomp($file_part);
5239: my $path_part = join('/', @paths_and_file);
5240: $path_part .= '/';
5241: my $path_and_file = $path_part.$file_part;
5242: if ($path_part ne $path) {
5243: push(@return_files, ($path_and_file));
5244: }
5245: }
5246: close(OUT);
5247: return (@return_files);
5248: }
5249:
5250: #----------------------------------------------Get portfolio file permissions
5251:
5252: sub get_portfile_permissions {
5253: my ($domain,$user) = @_;
5254: my %current_permissions = &dump('file_permissions',$domain,$user);
5255: my ($tmp)=keys(%current_permissions);
5256: if ($tmp=~/^error:/) { undef(%current_permissions); }
5257: return \%current_permissions;
5258: }
5259:
5260: #---------------------------------------------Get portfolio file access controls
5261:
5262: sub get_access_controls {
5263: my ($current_permissions,$group,$file) = @_;
5264: my %access;
5265: my $real_file = $file;
5266: $file =~ s/\.meta$//;
5267: if (defined($file)) {
5268: if (ref($$current_permissions{$file."\0".'accesscontrol'}) eq 'HASH') {
5269: foreach my $control (keys(%{$$current_permissions{$file."\0".'accesscontrol'}})) {
5270: $access{$real_file}{$control} = $$current_permissions{$file."\0".$control};
5271: }
5272: }
5273: } else {
5274: foreach my $key (keys(%{$current_permissions})) {
5275: if ($key =~ /\0accesscontrol$/) {
5276: if (defined($group)) {
5277: if ($key !~ m-^\Q$group\E/-) {
5278: next;
5279: }
5280: }
5281: my ($fullpath) = split(/\0/,$key);
5282: if (ref($$current_permissions{$key}) eq 'HASH') {
5283: foreach my $control (keys(%{$$current_permissions{$key}})) {
5284: $access{$fullpath}{$control}=$$current_permissions{$fullpath."\0".$control};
5285: }
5286: }
5287: }
5288: }
5289: }
5290: return %access;
5291: }
5292:
5293: sub modify_access_controls {
5294: my ($file_name,$changes,$domain,$user)=@_;
5295: my ($outcome,$deloutcome);
5296: my %store_permissions;
5297: my %new_values;
5298: my %new_control;
5299: my %translation;
5300: my @deletions = ();
5301: my $now = time;
5302: if (exists($$changes{'activate'})) {
5303: if (ref($$changes{'activate'}) eq 'HASH') {
5304: my @newitems = sort(keys(%{$$changes{'activate'}}));
5305: my $numnew = scalar(@newitems);
5306: for (my $i=0; $i<$numnew; $i++) {
5307: my $newkey = $newitems[$i];
5308: my $newid = &Apache::loncommon::get_cgi_id();
5309: if ($newkey =~ /^\d+:/) {
5310: $newkey =~ s/^(\d+)/$newid/;
5311: $translation{$1} = $newid;
5312: } elsif ($newkey =~ /^\d+_\d+_\d+:/) {
5313: $newkey =~ s/^(\d+_\d+_\d+)/$newid/;
5314: $translation{$1} = $newid;
5315: }
5316: $new_values{$file_name."\0".$newkey} =
5317: $$changes{'activate'}{$newitems[$i]};
5318: $new_control{$newkey} = $now;
5319: }
5320: }
5321: }
5322: my %todelete;
5323: my %changed_items;
5324: foreach my $action ('delete','update') {
5325: if (exists($$changes{$action})) {
5326: if (ref($$changes{$action}) eq 'HASH') {
5327: foreach my $key (keys(%{$$changes{$action}})) {
5328: my ($itemnum) = ($key =~ /^([^:]+):/);
5329: if ($action eq 'delete') {
5330: $todelete{$itemnum} = 1;
5331: } else {
5332: $changed_items{$itemnum} = $key;
5333: }
5334: }
5335: }
5336: }
5337: }
5338: # get lock on access controls for file.
5339: my $lockhash = {
5340: $file_name."\0".'locked_access_records' => $env{'user.name'}.
5341: ':'.$env{'user.domain'},
5342: };
5343: my $tries = 0;
5344: my $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5345:
5346: while (($gotlock ne 'ok') && $tries <3) {
5347: $tries ++;
5348: sleep 1;
5349: $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5350: }
5351: if ($gotlock eq 'ok') {
5352: my %curr_permissions = &dump('file_permissions',$domain,$user,$file_name);
5353: my ($tmp)=keys(%curr_permissions);
5354: if ($tmp=~/^error:/) { undef(%curr_permissions); }
5355: if (exists($curr_permissions{$file_name."\0".'accesscontrol'})) {
5356: my $curr_controls = $curr_permissions{$file_name."\0".'accesscontrol'};
5357: if (ref($curr_controls) eq 'HASH') {
5358: foreach my $control_item (keys(%{$curr_controls})) {
5359: my ($itemnum) = ($control_item =~ /^([^:]+):/);
5360: if (defined($todelete{$itemnum})) {
5361: push(@deletions,$file_name."\0".$control_item);
5362: } else {
5363: if (defined($changed_items{$itemnum})) {
5364: $new_control{$changed_items{$itemnum}} = $now;
5365: push(@deletions,$file_name."\0".$control_item);
5366: $new_values{$file_name."\0".$changed_items{$itemnum}} = $$changes{'update'}{$changed_items{$itemnum}};
5367: } else {
5368: $new_control{$control_item} = $$curr_controls{$control_item};
5369: }
5370: }
5371: }
5372: }
5373: }
5374: $deloutcome = &del('file_permissions',\@deletions,$domain,$user);
5375: $new_values{$file_name."\0".'accesscontrol'} = \%new_control;
5376: $outcome = &put('file_permissions',\%new_values,$domain,$user);
5377: # remove lock
5378: my @del_lock = ($file_name."\0".'locked_access_records');
5379: my $dellockoutcome = &del('file_permissions',\@del_lock,$domain,$user);
5380: my ($file,$group);
5381: if (&is_course($domain,$user)) {
5382: ($group,$file) = split(/\//,$file_name,2);
5383: } else {
5384: $file = $file_name;
5385: }
5386: my $sqlresult =
5387: &update_portfolio_table($user,$domain,$file,'portfolio_access',
5388: $group);
5389: } else {
5390: $outcome = "error: could not obtain lockfile\n";
5391: }
5392: return ($outcome,$deloutcome,\%new_values,\%translation);
5393: }
5394:
5395: sub make_public_indefinitely {
5396: my ($requrl) = @_;
5397: my $now = time;
5398: my $action = 'activate';
5399: my $aclnum = 0;
5400: if (&is_portfolio_url($requrl)) {
5401: my (undef,$udom,$unum,$file_name,$group) =
5402: &parse_portfolio_url($requrl);
5403: my $current_perms = &get_portfile_permissions($udom,$unum);
5404: my %access_controls = &get_access_controls($current_perms,
5405: $group,$file_name);
5406: foreach my $key (keys(%{$access_controls{$file_name}})) {
5407: my ($num,$scope,$end,$start) =
5408: ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
5409: if ($scope eq 'public') {
5410: if ($start <= $now && $end == 0) {
5411: $action = 'none';
5412: } else {
5413: $action = 'update';
5414: $aclnum = $num;
5415: }
5416: last;
5417: }
5418: }
5419: if ($action eq 'none') {
5420: return 'ok';
5421: } else {
5422: my %changes;
5423: my $newend = 0;
5424: my $newstart = $now;
5425: my $newkey = $aclnum.':public_'.$newend.'_'.$newstart;
5426: $changes{$action}{$newkey} = {
5427: type => 'public',
5428: time => {
5429: start => $newstart,
5430: end => $newend,
5431: },
5432: };
5433: my ($outcome,$deloutcome,$new_values,$translation) =
5434: &modify_access_controls($file_name,\%changes,$udom,$unum);
5435: return $outcome;
5436: }
5437: } else {
5438: return 'invalid';
5439: }
5440: }
5441:
5442: #------------------------------------------------------Get Marked as Read Only
5443:
5444: sub get_marked_as_readonly {
5445: my ($domain,$user,$what,$group) = @_;
5446: my $current_permissions = &get_portfile_permissions($domain,$user);
5447: my @readonly_files;
5448: my $cmp1=$what;
5449: if (ref($what)) { $cmp1=join('',@{$what}) };
5450: while (my ($file_name,$value) = each(%{$current_permissions})) {
5451: if (defined($group)) {
5452: if ($file_name !~ m-^\Q$group\E/-) {
5453: next;
5454: }
5455: }
5456: if (ref($value) eq "ARRAY"){
5457: foreach my $stored_what (@{$value}) {
5458: my $cmp2=$stored_what;
5459: if (ref($stored_what) eq 'ARRAY') {
5460: $cmp2=join('',@{$stored_what});
5461: }
5462: if ($cmp1 eq $cmp2) {
5463: push(@readonly_files, $file_name);
5464: last;
5465: } elsif (!defined($what)) {
5466: push(@readonly_files, $file_name);
5467: last;
5468: }
5469: }
5470: }
5471: }
5472: return @readonly_files;
5473: }
5474: #-----------------------------------------------------------Get Marked as Read Only Hash
5475:
5476: sub get_marked_as_readonly_hash {
5477: my ($current_permissions,$group,$what) = @_;
5478: my %readonly_files;
5479: while (my ($file_name,$value) = each(%{$current_permissions})) {
5480: if (defined($group)) {
5481: if ($file_name !~ m-^\Q$group\E/-) {
5482: next;
5483: }
5484: }
5485: if (ref($value) eq "ARRAY"){
5486: foreach my $stored_what (@{$value}) {
5487: if (ref($stored_what) eq 'ARRAY') {
5488: foreach my $lock_descriptor(@{$stored_what}) {
5489: if ($lock_descriptor eq 'graded') {
5490: $readonly_files{$file_name} = 'graded';
5491: } elsif ($lock_descriptor eq 'handback') {
5492: $readonly_files{$file_name} = 'handback';
5493: } else {
5494: if (!exists($readonly_files{$file_name})) {
5495: $readonly_files{$file_name} = 'locked';
5496: }
5497: }
5498: }
5499: }
5500: }
5501: }
5502: }
5503: return %readonly_files;
5504: }
5505: # ------------------------------------------------------------ Unmark as Read Only
5506:
5507: sub unmark_as_readonly {
5508: # unmarks $file_name (if $file_name is defined), or all files locked by $what
5509: # for portfolio submissions, $what contains [$symb,$crsid]
5510: my ($domain,$user,$what,$file_name,$group) = @_;
5511: $file_name = &declutter_portfile($file_name);
5512: my $symb_crs = $what;
5513: if (ref($what)) { $symb_crs=join('',@$what); }
5514: my %current_permissions = &dump('file_permissions',$domain,$user,$group);
5515: my ($tmp)=keys(%current_permissions);
5516: if ($tmp=~/^error:/) { undef(%current_permissions); }
5517: my @readonly_files = &get_marked_as_readonly($domain,$user,$what,$group);
5518: foreach my $file (@readonly_files) {
5519: my $clean_file = &declutter_portfile($file);
5520: if (defined($file_name) && ($file_name ne $clean_file)) { next; }
5521: my $current_locks = $current_permissions{$file};
5522: my @new_locks;
5523: my @del_keys;
5524: if (ref($current_locks) eq "ARRAY"){
5525: foreach my $locker (@{$current_locks}) {
5526: my $compare=$locker;
5527: if (ref($locker) eq 'ARRAY') {
5528: $compare=join('',@{$locker});
5529: if ($compare ne $symb_crs) {
5530: push(@new_locks, $locker);
5531: }
5532: }
5533: }
5534: if (scalar(@new_locks) > 0) {
5535: $current_permissions{$file} = \@new_locks;
5536: } else {
5537: push(@del_keys, $file);
5538: &del('file_permissions',\@del_keys, $domain, $user);
5539: delete($current_permissions{$file});
5540: }
5541: }
5542: }
5543: &put('file_permissions',\%current_permissions,$domain,$user);
5544: return;
5545: }
5546:
5547: # ------------------------------------------------------------ Directory lister
5548:
5549: sub dirlist {
5550: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
5551:
5552: $uri=~s/^\///;
5553: $uri=~s/\/$//;
5554: my ($udom, $uname);
5555: (undef,$udom,$uname)=split(/\//,$uri);
5556: if(defined($userdomain)) {
5557: $udom = $userdomain;
5558: }
5559: if(defined($username)) {
5560: $uname = $username;
5561: }
5562:
5563: my $dirRoot = $perlvar{'lonDocRoot'};
5564: if(defined($alternateDirectoryRoot)) {
5565: $dirRoot = $alternateDirectoryRoot;
5566: $dirRoot =~ s/\/$//;
5567: }
5568:
5569: if($udom) {
5570: if($uname) {
5571: my $listing = &reply('ls2:'.$dirRoot.'/'.$uri,
5572: &homeserver($uname,$udom));
5573: my @listing_results;
5574: if ($listing eq 'unknown_cmd') {
5575: $listing = &reply('ls:'.$dirRoot.'/'.$uri,
5576: &homeserver($uname,$udom));
5577: @listing_results = split(/:/,$listing);
5578: } else {
5579: @listing_results = map { &unescape($_); } split(/:/,$listing);
5580: }
5581: return @listing_results;
5582: } elsif(!defined($alternateDirectoryRoot)) {
5583: my %allusers;
5584: foreach my $tryserver (keys(%libserv)) {
5585: if($hostdom{$tryserver} eq $udom) {
5586: my $listing = &reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
5587: $udom, $tryserver);
5588: my @listing_results;
5589: if ($listing eq 'unknown_cmd') {
5590: $listing = &reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
5591: $udom, $tryserver);
5592: @listing_results = split(/:/,$listing);
5593: } else {
5594: @listing_results =
5595: map { &unescape($_); } split(/:/,$listing);
5596: }
5597: if ($listing_results[0] ne 'no_such_dir' &&
5598: $listing_results[0] ne 'empty' &&
5599: $listing_results[0] ne 'con_lost') {
5600: foreach my $line (@listing_results) {
5601: my ($entry) = split(/&/,$line,2);
5602: $allusers{$entry} = 1;
5603: }
5604: }
5605: }
5606: }
5607: my $alluserstr='';
5608: foreach my $user (sort(keys(%allusers))) {
5609: $alluserstr.=$user.'&user:';
5610: }
5611: $alluserstr=~s/:$//;
5612: return split(/:/,$alluserstr);
5613: } else {
5614: return ('missing user name');
5615: }
5616: } elsif(!defined($alternateDirectoryRoot)) {
5617: my $tryserver;
5618: my %alldom=();
5619: foreach $tryserver (keys(%libserv)) {
5620: $alldom{$hostdom{$tryserver}}=1;
5621: }
5622: my $alldomstr='';
5623: foreach my $domain (sort(keys(%alldom))) {
5624: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$domain.'/&domain:';
5625: }
5626: $alldomstr=~s/:$//;
5627: return split(/:/,$alldomstr);
5628: } else {
5629: return ('missing domain');
5630: }
5631: }
5632:
5633: # --------------------------------------------- GetFileTimestamp
5634: # This function utilizes dirlist and returns the date stamp for
5635: # when it was last modified. It will also return an error of -1
5636: # if an error occurs
5637:
5638: ##
5639: ## FIXME: This subroutine assumes its caller knows something about the
5640: ## directory structure of the home server for the student ($root).
5641: ## Not a good assumption to make. Since this is for looking up files
5642: ## in user directories, the full path should be constructed by lond, not
5643: ## whatever machine we request data from.
5644: ##
5645: sub GetFileTimestamp {
5646: my ($studentDomain,$studentName,$filename,$root)=@_;
5647: $studentDomain = &LONCAPA::clean_domain($studentDomain);
5648: $studentName = &LONCAPA::clean_username($studentName);
5649: my $subdir=$studentName.'__';
5650: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
5651: my $proname="$studentDomain/$subdir/$studentName";
5652: $proname .= '/'.$filename;
5653: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
5654: $studentName, $root);
5655: my @stats = split('&', $fileStat);
5656: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5657: # @stats contains first the filename, then the stat output
5658: return $stats[10]; # so this is 10 instead of 9.
5659: } else {
5660: return -1;
5661: }
5662: }
5663:
5664: sub stat_file {
5665: my ($uri) = @_;
5666: $uri = &clutter_with_no_wrapper($uri);
5667:
5668: my ($udom,$uname,$file,$dir);
5669: if ($uri =~ m-^/(uploaded|editupload)/-) {
5670: ($udom,$uname,$file) =
5671: ($uri =~ m-/(?:uploaded|editupload)/?($match_domain)/?($match_name)/?(.*)-);
5672: $file = 'userfiles/'.$file;
5673: $dir = &propath($udom,$uname);
5674: }
5675: if ($uri =~ m-^/res/-) {
5676: ($udom,$uname) =
5677: ($uri =~ m-/(?:res)/?($match_domain)/?($match_username)/-);
5678: $file = $uri;
5679: }
5680:
5681: if (!$udom || !$uname || !$file) {
5682: # unable to handle the uri
5683: return ();
5684: }
5685:
5686: my ($result) = &dirlist($file,$udom,$uname,$dir);
5687: my @stats = split('&', $result);
5688:
5689: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5690: shift(@stats); #filename is first
5691: return @stats;
5692: }
5693: return ();
5694: }
5695:
5696: # -------------------------------------------------------- Value of a Condition
5697:
5698: # gets the value of a specific preevaluated condition
5699: # stored in the string $env{user.state.<cid>}
5700: # or looks up a condition reference in the bighash and if if hasn't
5701: # already been evaluated recurses into docondval to get the value of
5702: # the condition, then memoizing it to
5703: # $env{user.state.<cid>.<condition>}
5704: sub directcondval {
5705: my $number=shift;
5706: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
5707: &Apache::lonuserstate::evalstate();
5708: }
5709: if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
5710: return $env{'user.state.'.$env{'request.course.id'}.".$number"};
5711: } elsif ($number =~ /^_/) {
5712: my $sub_condition;
5713: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5714: &GDBM_READER(),0640)) {
5715: $sub_condition=$bighash{'conditions'.$number};
5716: untie(%bighash);
5717: }
5718: my $value = &docondval($sub_condition);
5719: &appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
5720: return $value;
5721: }
5722: if ($env{'user.state.'.$env{'request.course.id'}}) {
5723: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
5724: } else {
5725: return 2;
5726: }
5727: }
5728:
5729: # get the collection of conditions for this resource
5730: sub condval {
5731: my $condidx=shift;
5732: my $allpathcond='';
5733: foreach my $cond (split(/\|/,$condidx)) {
5734: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
5735: $allpathcond.=
5736: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
5737: }
5738: }
5739: $allpathcond=~s/\|$//;
5740: return &docondval($allpathcond);
5741: }
5742:
5743: #evaluates an expression of conditions
5744: sub docondval {
5745: my ($allpathcond) = @_;
5746: my $result=0;
5747: if ($env{'request.course.id'}
5748: && defined($allpathcond)) {
5749: my $operand='|';
5750: my @stack;
5751: foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
5752: if ($chunk eq '(') {
5753: push @stack,($operand,$result);
5754: } elsif ($chunk eq ')') {
5755: my $before=pop @stack;
5756: if (pop @stack eq '&') {
5757: $result=$result>$before?$before:$result;
5758: } else {
5759: $result=$result>$before?$result:$before;
5760: }
5761: } elsif (($chunk eq '&') || ($chunk eq '|')) {
5762: $operand=$chunk;
5763: } else {
5764: my $new=directcondval($chunk);
5765: if ($operand eq '&') {
5766: $result=$result>$new?$new:$result;
5767: } else {
5768: $result=$result>$new?$result:$new;
5769: }
5770: }
5771: }
5772: }
5773: return $result;
5774: }
5775:
5776: # ---------------------------------------------------- Devalidate courseresdata
5777:
5778: sub devalidatecourseresdata {
5779: my ($coursenum,$coursedomain)=@_;
5780: my $hashid=$coursenum.':'.$coursedomain;
5781: &devalidate_cache_new('courseres',$hashid);
5782: }
5783:
5784:
5785: # --------------------------------------------------- Course Resourcedata Query
5786:
5787: sub get_courseresdata {
5788: my ($coursenum,$coursedomain)=@_;
5789: my $coursehom=&homeserver($coursenum,$coursedomain);
5790: my $hashid=$coursenum.':'.$coursedomain;
5791: my ($result,$cached)=&is_cached_new('courseres',$hashid);
5792: my %dumpreply;
5793: unless (defined($cached)) {
5794: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
5795: $result=\%dumpreply;
5796: my ($tmp) = keys(%dumpreply);
5797: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
5798: &do_cache_new('courseres',$hashid,$result,600);
5799: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
5800: return $tmp;
5801: } elsif ($tmp =~ /^(error)/) {
5802: $result=undef;
5803: &do_cache_new('courseres',$hashid,$result,600);
5804: }
5805: }
5806: return $result;
5807: }
5808:
5809: sub devalidateuserresdata {
5810: my ($uname,$udom)=@_;
5811: my $hashid="$udom:$uname";
5812: &devalidate_cache_new('userres',$hashid);
5813: }
5814:
5815: sub get_userresdata {
5816: my ($uname,$udom)=@_;
5817: #most student don\'t have any data set, check if there is some data
5818: if (&EXT_cache_status($udom,$uname)) { return undef; }
5819:
5820: my $hashid="$udom:$uname";
5821: my ($result,$cached)=&is_cached_new('userres',$hashid);
5822: if (!defined($cached)) {
5823: my %resourcedata=&dump('resourcedata',$udom,$uname);
5824: $result=\%resourcedata;
5825: &do_cache_new('userres',$hashid,$result,600);
5826: }
5827: my ($tmp)=keys(%$result);
5828: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
5829: return $result;
5830: }
5831: #error 2 occurs when the .db doesn't exist
5832: if ($tmp!~/error: 2 /) {
5833: &logthis("<font color=\"blue\">WARNING:".
5834: " Trying to get resource data for ".
5835: $uname." at ".$udom.": ".
5836: $tmp."</font>");
5837: } elsif ($tmp=~/error: 2 /) {
5838: #&EXT_cache_set($udom,$uname);
5839: &do_cache_new('userres',$hashid,undef,600);
5840: undef($tmp); # not really an error so don't send it back
5841: }
5842: return $tmp;
5843: }
5844:
5845: sub resdata {
5846: my ($name,$domain,$type,@which)=@_;
5847: my $result;
5848: if ($type eq 'course') {
5849: $result=&get_courseresdata($name,$domain);
5850: } elsif ($type eq 'user') {
5851: $result=&get_userresdata($name,$domain);
5852: }
5853: if (!ref($result)) { return $result; }
5854: foreach my $item (@which) {
5855: if (defined($result->{$item})) {
5856: return $result->{$item};
5857: }
5858: }
5859: return undef;
5860: }
5861:
5862: #
5863: # EXT resource caching routines
5864: #
5865:
5866: sub clear_EXT_cache_status {
5867: &delenv('cache.EXT.');
5868: }
5869:
5870: sub EXT_cache_status {
5871: my ($target_domain,$target_user) = @_;
5872: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5873: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
5874: # We know already the user has no data
5875: return 1;
5876: } else {
5877: return 0;
5878: }
5879: }
5880:
5881: sub EXT_cache_set {
5882: my ($target_domain,$target_user) = @_;
5883: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5884: #&appenv($cachename => time);
5885: }
5886:
5887: # --------------------------------------------------------- Value of a Variable
5888: sub EXT {
5889:
5890: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
5891: unless ($varname) { return ''; }
5892: #get real user name/domain, courseid and symb
5893: my $courseid;
5894: my $publicuser;
5895: if ($symbparm) {
5896: $symbparm=&get_symb_from_alias($symbparm);
5897: }
5898: if (!($uname && $udom)) {
5899: (my $cursymb,$courseid,$udom,$uname,$publicuser)= &whichuser($symbparm);
5900: if (!$symbparm) { $symbparm=$cursymb; }
5901: } else {
5902: $courseid=$env{'request.course.id'};
5903: }
5904: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
5905: my $rest;
5906: if (defined($therest[0])) {
5907: $rest=join('.',@therest);
5908: } else {
5909: $rest='';
5910: }
5911:
5912: my $qualifierrest=$qualifier;
5913: if ($rest) { $qualifierrest.='.'.$rest; }
5914: my $spacequalifierrest=$space;
5915: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
5916: if ($realm eq 'user') {
5917: # --------------------------------------------------------------- user.resource
5918: if ($space eq 'resource') {
5919: if ( (defined($Apache::lonhomework::parsing_a_problem)
5920: || defined($Apache::lonhomework::parsing_a_task))
5921: &&
5922: ($symbparm eq &symbread()) ) {
5923: # if we are in the middle of processing the resource the
5924: # get the value we are planning on committing
5925: if (defined($Apache::lonhomework::results{$qualifierrest})) {
5926: return $Apache::lonhomework::results{$qualifierrest};
5927: } else {
5928: return $Apache::lonhomework::history{$qualifierrest};
5929: }
5930: } else {
5931: my %restored;
5932: if ($publicuser || $env{'request.state'} eq 'construct') {
5933: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
5934: } else {
5935: %restored=&restore($symbparm,$courseid,$udom,$uname);
5936: }
5937: return $restored{$qualifierrest};
5938: }
5939: # ----------------------------------------------------------------- user.access
5940: } elsif ($space eq 'access') {
5941: # FIXME - not supporting calls for a specific user
5942: return &allowed($qualifier,$rest);
5943: # ------------------------------------------ user.preferences, user.environment
5944: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
5945: if (($uname eq $env{'user.name'}) &&
5946: ($udom eq $env{'user.domain'})) {
5947: return $env{join('.',('environment',$qualifierrest))};
5948: } else {
5949: my %returnhash;
5950: if (!$publicuser) {
5951: %returnhash=&userenvironment($udom,$uname,
5952: $qualifierrest);
5953: }
5954: return $returnhash{$qualifierrest};
5955: }
5956: # ----------------------------------------------------------------- user.course
5957: } elsif ($space eq 'course') {
5958: # FIXME - not supporting calls for a specific user
5959: return $env{join('.',('request.course',$qualifier))};
5960: # ------------------------------------------------------------------- user.role
5961: } elsif ($space eq 'role') {
5962: # FIXME - not supporting calls for a specific user
5963: my ($role,$where)=split(/\./,$env{'request.role'});
5964: if ($qualifier eq 'value') {
5965: return $role;
5966: } elsif ($qualifier eq 'extent') {
5967: return $where;
5968: }
5969: # ----------------------------------------------------------------- user.domain
5970: } elsif ($space eq 'domain') {
5971: return $udom;
5972: # ------------------------------------------------------------------- user.name
5973: } elsif ($space eq 'name') {
5974: return $uname;
5975: # ---------------------------------------------------- Any other user namespace
5976: } else {
5977: my %reply;
5978: if (!$publicuser) {
5979: %reply=&get($space,[$qualifierrest],$udom,$uname);
5980: }
5981: return $reply{$qualifierrest};
5982: }
5983: } elsif ($realm eq 'query') {
5984: # ---------------------------------------------- pull stuff out of query string
5985: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
5986: [$spacequalifierrest]);
5987: return $env{'form.'.$spacequalifierrest};
5988: } elsif ($realm eq 'request') {
5989: # ------------------------------------------------------------- request.browser
5990: if ($space eq 'browser') {
5991: if ($qualifier eq 'textremote') {
5992: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
5993: return 1;
5994: } else {
5995: return 0;
5996: }
5997: } else {
5998: return $env{'browser.'.$qualifier};
5999: }
6000: # ------------------------------------------------------------ request.filename
6001: } else {
6002: return $env{'request.'.$spacequalifierrest};
6003: }
6004: } elsif ($realm eq 'course') {
6005: # ---------------------------------------------------------- course.description
6006: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
6007: } elsif ($realm eq 'resource') {
6008:
6009: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
6010: if (!$symbparm) { $symbparm=&symbread(); }
6011: }
6012:
6013: if ($space eq 'title') {
6014: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
6015: return &gettitle($symbparm);
6016: }
6017:
6018: if ($space eq 'map') {
6019: my ($map) = &decode_symb($symbparm);
6020: return &symbread($map);
6021: }
6022:
6023: my ($section, $group, @groups);
6024: my ($courselevelm,$courselevel);
6025: if ($symbparm && defined($courseid) &&
6026: $courseid eq $env{'request.course.id'}) {
6027:
6028: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
6029:
6030: # ----------------------------------------------------- Cascading lookup scheme
6031: my $symbp=$symbparm;
6032: my $mapp=&deversion((&decode_symb($symbp))[0]);
6033:
6034: my $symbparm=$symbp.'.'.$spacequalifierrest;
6035: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
6036:
6037: if (($env{'user.name'} eq $uname) &&
6038: ($env{'user.domain'} eq $udom)) {
6039: $section=$env{'request.course.sec'};
6040: @groups = split(/:/,$env{'request.course.groups'});
6041: @groups=&sort_course_groups($courseid,@groups);
6042: } else {
6043: if (! defined($usection)) {
6044: $section=&getsection($udom,$uname,$courseid);
6045: } else {
6046: $section = $usection;
6047: }
6048: @groups = &get_users_groups($udom,$uname,$courseid);
6049: }
6050:
6051: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
6052: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
6053: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
6054:
6055: $courselevel=$courseid.'.'.$spacequalifierrest;
6056: my $courselevelr=$courseid.'.'.$symbparm;
6057: $courselevelm=$courseid.'.'.$mapparm;
6058:
6059: # ----------------------------------------------------------- first, check user
6060:
6061: my $userreply=&resdata($uname,$udom,'user',
6062: ($courselevelr,$courselevelm,
6063: $courselevel));
6064: if (defined($userreply)) { return $userreply; }
6065:
6066: # ------------------------------------------------ second, check some of course
6067: my $coursereply;
6068: if (@groups > 0) {
6069: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
6070: $mapparm,$spacequalifierrest);
6071: if (defined($coursereply)) { return $coursereply; }
6072: }
6073:
6074: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
6075: $env{'course.'.$courseid.'.domain'},
6076: 'course',
6077: ($seclevelr,$seclevelm,$seclevel,
6078: $courselevelr));
6079: if (defined($coursereply)) { return $coursereply; }
6080:
6081: # ------------------------------------------------------ third, check map parms
6082: my %parmhash=();
6083: my $thisparm='';
6084: if (tie(%parmhash,'GDBM_File',
6085: $env{'request.course.fn'}.'_parms.db',
6086: &GDBM_READER(),0640)) {
6087: $thisparm=$parmhash{$symbparm};
6088: untie(%parmhash);
6089: }
6090: if ($thisparm) { return $thisparm; }
6091: }
6092: # ------------------------------------------ fourth, look in resource metadata
6093:
6094: $spacequalifierrest=~s/\./\_/;
6095: my $filename;
6096: if (!$symbparm) { $symbparm=&symbread(); }
6097: if ($symbparm) {
6098: $filename=(&decode_symb($symbparm))[2];
6099: } else {
6100: $filename=$env{'request.filename'};
6101: }
6102: my $metadata=&metadata($filename,$spacequalifierrest);
6103: if (defined($metadata)) { return $metadata; }
6104: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
6105: if (defined($metadata)) { return $metadata; }
6106:
6107: # ---------------------------------------------- fourth, look in rest pf course
6108: if ($symbparm && defined($courseid) &&
6109: $courseid eq $env{'request.course.id'}) {
6110: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
6111: $env{'course.'.$courseid.'.domain'},
6112: 'course',
6113: ($courselevelm,$courselevel));
6114: if (defined($coursereply)) { return $coursereply; }
6115: }
6116: # ------------------------------------------------------------------ Cascade up
6117: unless ($space eq '0') {
6118: my @parts=split(/_/,$space);
6119: my $id=pop(@parts);
6120: my $part=join('_',@parts);
6121: if ($part eq '') { $part='0'; }
6122: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
6123: $symbparm,$udom,$uname,$section,1);
6124: if (defined($partgeneral)) { return $partgeneral; }
6125: }
6126: if ($recurse) { return undef; }
6127: my $pack_def=&packages_tab_default($filename,$varname);
6128: if (defined($pack_def)) { return $pack_def; }
6129:
6130: # ---------------------------------------------------- Any other user namespace
6131: } elsif ($realm eq 'environment') {
6132: # ----------------------------------------------------------------- environment
6133: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
6134: return $env{'environment.'.$spacequalifierrest};
6135: } else {
6136: if ($uname eq 'anonymous' && $udom eq '') {
6137: return '';
6138: }
6139: my %returnhash=&userenvironment($udom,$uname,
6140: $spacequalifierrest);
6141: return $returnhash{$spacequalifierrest};
6142: }
6143: } elsif ($realm eq 'system') {
6144: # ----------------------------------------------------------------- system.time
6145: if ($space eq 'time') {
6146: return time;
6147: }
6148: } elsif ($realm eq 'server') {
6149: # ----------------------------------------------------------------- system.time
6150: if ($space eq 'name') {
6151: return $ENV{'SERVER_NAME'};
6152: }
6153: }
6154: return '';
6155: }
6156:
6157: sub check_group_parms {
6158: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
6159: my @groupitems = ();
6160: my $resultitem;
6161: my @levels = ($symbparm,$mapparm,$what);
6162: foreach my $group (@{$groups}) {
6163: foreach my $level (@levels) {
6164: my $item = $courseid.'.['.$group.'].'.$level;
6165: push(@groupitems,$item);
6166: }
6167: }
6168: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
6169: $env{'course.'.$courseid.'.domain'},
6170: 'course',@groupitems);
6171: return $coursereply;
6172: }
6173:
6174: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
6175: my ($courseid,@groups) = @_;
6176: @groups = sort(@groups);
6177: return @groups;
6178: }
6179:
6180: sub packages_tab_default {
6181: my ($uri,$varname)=@_;
6182: my (undef,$part,$name)=split(/\./,$varname);
6183:
6184: my (@extension,@specifics,$do_default);
6185: foreach my $package (split(/,/,&metadata($uri,'packages'))) {
6186: my ($pack_type,$pack_part)=split(/_/,$package,2);
6187: if ($pack_type eq 'default') {
6188: $do_default=1;
6189: } elsif ($pack_type eq 'extension') {
6190: push(@extension,[$package,$pack_type,$pack_part]);
6191: } else {
6192: push(@specifics,[$package,$pack_type,$pack_part]);
6193: }
6194: }
6195: # first look for a package that matches the requested part id
6196: foreach my $package (@specifics) {
6197: my (undef,$pack_type,$pack_part)=@{$package};
6198: next if ($pack_part ne $part);
6199: if (defined($packagetab{"$pack_type&$name&default"})) {
6200: return $packagetab{"$pack_type&$name&default"};
6201: }
6202: }
6203: # look for any possible matching non extension_ package
6204: foreach my $package (@specifics) {
6205: my (undef,$pack_type,$pack_part)=@{$package};
6206: if (defined($packagetab{"$pack_type&$name&default"})) {
6207: return $packagetab{"$pack_type&$name&default"};
6208: }
6209: if ($pack_type eq 'part') { $pack_part='0'; }
6210: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
6211: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
6212: }
6213: }
6214: # look for any posible extension_ match
6215: foreach my $package (@extension) {
6216: my ($package,$pack_type)=@{$package};
6217: if (defined($packagetab{"$pack_type&$name&default"})) {
6218: return $packagetab{"$pack_type&$name&default"};
6219: }
6220: if (defined($packagetab{$package."&$name&default"})) {
6221: return $packagetab{$package."&$name&default"};
6222: }
6223: }
6224: # look for a global default setting
6225: if ($do_default && defined($packagetab{"default&$name&default"})) {
6226: return $packagetab{"default&$name&default"};
6227: }
6228: return undef;
6229: }
6230:
6231: sub add_prefix_and_part {
6232: my ($prefix,$part)=@_;
6233: my $keyroot;
6234: if (defined($prefix) && $prefix !~ /^__/) {
6235: # prefix that has a part already
6236: $keyroot=$prefix;
6237: } elsif (defined($prefix)) {
6238: # prefix that is missing a part
6239: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
6240: } else {
6241: # no prefix at all
6242: if (defined($part)) { $keyroot='_'.$part; }
6243: }
6244: return $keyroot;
6245: }
6246:
6247: # ---------------------------------------------------------------- Get metadata
6248:
6249: my %metaentry;
6250: sub metadata {
6251: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
6252: $uri=&declutter($uri);
6253: # if it is a non metadata possible uri return quickly
6254: if (($uri eq '') ||
6255: (($uri =~ m|^/*adm/|) &&
6256: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
6257: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
6258: ($uri =~ m|home/$match_username/public_html/|)) {
6259: return undef;
6260: }
6261: my $filename=$uri;
6262: $uri=~s/\.meta$//;
6263: #
6264: # Is the metadata already cached?
6265: # Look at timestamp of caching
6266: # Everything is cached by the main uri, libraries are never directly cached
6267: #
6268: if (!defined($liburi)) {
6269: my ($result,$cached)=&is_cached_new('meta',$uri);
6270: if (defined($cached)) { return $result->{':'.$what}; }
6271: }
6272: {
6273: #
6274: # Is this a recursive call for a library?
6275: #
6276: # if (! exists($metacache{$uri})) {
6277: # $metacache{$uri}={};
6278: # }
6279: if ($liburi) {
6280: $liburi=&declutter($liburi);
6281: $filename=$liburi;
6282: } else {
6283: &devalidate_cache_new('meta',$uri);
6284: undef(%metaentry);
6285: }
6286: my %metathesekeys=();
6287: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
6288: my $metastring;
6289: if ($uri !~ m -^(editupload)/-) {
6290: my $file=&filelocation('',&clutter($filename));
6291: #push(@{$metaentry{$uri.'.file'}},$file);
6292: $metastring=&getfile($file);
6293: }
6294: my $parser=HTML::LCParser->new(\$metastring);
6295: my $token;
6296: undef %metathesekeys;
6297: while ($token=$parser->get_token) {
6298: if ($token->[0] eq 'S') {
6299: if (defined($token->[2]->{'package'})) {
6300: #
6301: # This is a package - get package info
6302: #
6303: my $package=$token->[2]->{'package'};
6304: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6305: if (defined($token->[2]->{'id'})) {
6306: $keyroot.='_'.$token->[2]->{'id'};
6307: }
6308: if ($metaentry{':packages'}) {
6309: $metaentry{':packages'}.=','.$package.$keyroot;
6310: } else {
6311: $metaentry{':packages'}=$package.$keyroot;
6312: }
6313: foreach my $pack_entry (keys(%packagetab)) {
6314: my $part=$keyroot;
6315: $part=~s/^\_//;
6316: if ($pack_entry=~/^\Q$package\E\&/ ||
6317: $pack_entry=~/^\Q$package\E_0\&/) {
6318: my ($pack,$name,$subp)=split(/\&/,$pack_entry);
6319: # ignore package.tab specified default values
6320: # here &package_tab_default() will fetch those
6321: if ($subp eq 'default') { next; }
6322: my $value=$packagetab{$pack_entry};
6323: my $unikey;
6324: if ($pack =~ /_0$/) {
6325: $unikey='parameter_0_'.$name;
6326: $part=0;
6327: } else {
6328: $unikey='parameter'.$keyroot.'_'.$name;
6329: }
6330: if ($subp eq 'display') {
6331: $value.=' [Part: '.$part.']';
6332: }
6333: $metaentry{':'.$unikey.'.part'}=$part;
6334: $metathesekeys{$unikey}=1;
6335: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6336: $metaentry{':'.$unikey.'.'.$subp}=$value;
6337: }
6338: if (defined($metaentry{':'.$unikey.'.default'})) {
6339: $metaentry{':'.$unikey}=
6340: $metaentry{':'.$unikey.'.default'};
6341: }
6342: }
6343: }
6344: } else {
6345: #
6346: # This is not a package - some other kind of start tag
6347: #
6348: my $entry=$token->[1];
6349: my $unikey;
6350: if ($entry eq 'import') {
6351: $unikey='';
6352: } else {
6353: $unikey=$entry;
6354: }
6355: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6356:
6357: if (defined($token->[2]->{'id'})) {
6358: $unikey.='_'.$token->[2]->{'id'};
6359: }
6360:
6361: if ($entry eq 'import') {
6362: #
6363: # Importing a library here
6364: #
6365: if ($depthcount<20) {
6366: my $location=$parser->get_text('/import');
6367: my $dir=$filename;
6368: $dir=~s|[^/]*$||;
6369: $location=&filelocation($dir,$location);
6370: my $metadata =
6371: &metadata($uri,'keys', $location,$unikey,
6372: $depthcount+1);
6373: foreach my $meta (split(',',$metadata)) {
6374: $metaentry{':'.$meta}=$metaentry{':'.$meta};
6375: $metathesekeys{$meta}=1;
6376: }
6377: }
6378: } else {
6379:
6380: if (defined($token->[2]->{'name'})) {
6381: $unikey.='_'.$token->[2]->{'name'};
6382: }
6383: $metathesekeys{$unikey}=1;
6384: foreach my $param (@{$token->[3]}) {
6385: $metaentry{':'.$unikey.'.'.$param} =
6386: $token->[2]->{$param};
6387: }
6388: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
6389: my $default=$metaentry{':'.$unikey.'.default'};
6390: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
6391: # only ws inside the tag, and not in default, so use default
6392: # as value
6393: $metaentry{':'.$unikey}=$default;
6394: } else {
6395: # either something interesting inside the tag or default
6396: # uninteresting
6397: $metaentry{':'.$unikey}=$internaltext;
6398: }
6399: # end of not-a-package not-a-library import
6400: }
6401: # end of not-a-package start tag
6402: }
6403: # the next is the end of "start tag"
6404: }
6405: }
6406: my ($extension) = ($uri =~ /\.(\w+)$/);
6407: foreach my $key (keys(%packagetab)) {
6408: #no specific packages #how's our extension
6409: if ($key!~/^extension_\Q$extension\E&/) { next; }
6410: &metadata_create_package_def($uri,$key,'extension_'.$extension,
6411: \%metathesekeys);
6412: }
6413: if (!exists($metaentry{':packages'})) {
6414: foreach my $key (keys(%packagetab)) {
6415: #no specific packages well let's get default then
6416: if ($key!~/^default&/) { next; }
6417: &metadata_create_package_def($uri,$key,'default',
6418: \%metathesekeys);
6419: }
6420: }
6421: # are there custom rights to evaluate
6422: if ($metaentry{':copyright'} eq 'custom') {
6423:
6424: #
6425: # Importing a rights file here
6426: #
6427: unless ($depthcount) {
6428: my $location=$metaentry{':customdistributionfile'};
6429: my $dir=$filename;
6430: $dir=~s|[^/]*$||;
6431: $location=&filelocation($dir,$location);
6432: my $rights_metadata =
6433: &metadata($uri,'keys',$location,'_rights',
6434: $depthcount+1);
6435: foreach my $rights (split(',',$rights_metadata)) {
6436: #$metaentry{':'.$rights}=$metacache{$uri}->{':'.$rights};
6437: $metathesekeys{$rights}=1;
6438: }
6439: }
6440: }
6441: # uniqifiy package listing
6442: my %seen;
6443: my @uniq_packages =
6444: grep { ! $seen{$_} ++ } (split(',',$metaentry{':packages'}));
6445: $metaentry{':packages'} = join(',',@uniq_packages);
6446:
6447: $metaentry{':keys'} = join(',',keys(%metathesekeys));
6448: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
6449: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
6450: &do_cache_new('meta',$uri,\%metaentry,60*60);
6451: # this is the end of "was not already recently cached
6452: }
6453: return $metaentry{':'.$what};
6454: }
6455:
6456: sub metadata_create_package_def {
6457: my ($uri,$key,$package,$metathesekeys)=@_;
6458: my ($pack,$name,$subp)=split(/\&/,$key);
6459: if ($subp eq 'default') { next; }
6460:
6461: if (defined($metaentry{':packages'})) {
6462: $metaentry{':packages'}.=','.$package;
6463: } else {
6464: $metaentry{':packages'}=$package;
6465: }
6466: my $value=$packagetab{$key};
6467: my $unikey;
6468: $unikey='parameter_0_'.$name;
6469: $metaentry{':'.$unikey.'.part'}=0;
6470: $$metathesekeys{$unikey}=1;
6471: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6472: $metaentry{':'.$unikey.'.'.$subp}=$value;
6473: }
6474: if (defined($metaentry{':'.$unikey.'.default'})) {
6475: $metaentry{':'.$unikey}=
6476: $metaentry{':'.$unikey.'.default'};
6477: }
6478: }
6479:
6480: sub metadata_generate_part0 {
6481: my ($metadata,$metacache,$uri) = @_;
6482: my %allnames;
6483: foreach my $metakey (keys(%$metadata)) {
6484: if ($metakey=~/^parameter\_(.*)/) {
6485: my $part=$$metacache{':'.$metakey.'.part'};
6486: my $name=$$metacache{':'.$metakey.'.name'};
6487: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
6488: $allnames{$name}=$part;
6489: }
6490: }
6491: }
6492: foreach my $name (keys(%allnames)) {
6493: $$metadata{"parameter_0_$name"}=1;
6494: my $key=":parameter_0_$name";
6495: $$metacache{"$key.part"}='0';
6496: $$metacache{"$key.name"}=$name;
6497: $$metacache{"$key.type"}=$$metacache{':parameter_'.
6498: $allnames{$name}.'_'.$name.
6499: '.type'};
6500: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
6501: '.display'};
6502: my $expr='[Part: '.$allnames{$name}.']';
6503: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
6504: $$metacache{"$key.display"}=$olddis;
6505: }
6506: }
6507:
6508: # ------------------------------------------------------ Devalidate title cache
6509:
6510: sub devalidate_title_cache {
6511: my ($url)=@_;
6512: if (!$env{'request.course.id'}) { return; }
6513: my $symb=&symbread($url);
6514: if (!$symb) { return; }
6515: my $key=$env{'request.course.id'}."\0".$symb;
6516: &devalidate_cache_new('title',$key);
6517: }
6518:
6519: # ------------------------------------------------- Get the title of a resource
6520:
6521: sub gettitle {
6522: my $urlsymb=shift;
6523: my $symb=&symbread($urlsymb);
6524: if ($symb) {
6525: my $key=$env{'request.course.id'}."\0".$symb;
6526: my ($result,$cached)=&is_cached_new('title',$key);
6527: if (defined($cached)) {
6528: return $result;
6529: }
6530: my ($map,$resid,$url)=&decode_symb($symb);
6531: my $title='';
6532: my %bighash;
6533: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6534: &GDBM_READER(),0640)) {
6535: my $mapid=$bighash{'map_pc_'.&clutter($map)};
6536: $title=$bighash{'title_'.$mapid.'.'.$resid};
6537: untie %bighash;
6538: }
6539: $title=~s/\&colon\;/\:/gs;
6540: if ($title) {
6541: return &do_cache_new('title',$key,$title,600);
6542: }
6543: $urlsymb=$url;
6544: }
6545: my $title=&metadata($urlsymb,'title');
6546: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
6547: return $title;
6548: }
6549:
6550: sub get_slot {
6551: my ($which,$cnum,$cdom)=@_;
6552: if (!$cnum || !$cdom) {
6553: (undef,my $courseid)=&whichuser();
6554: $cdom=$env{'course.'.$courseid.'.domain'};
6555: $cnum=$env{'course.'.$courseid.'.num'};
6556: }
6557: my $key=join("\0",'slots',$cdom,$cnum,$which);
6558: my %slotinfo;
6559: if (exists($remembered{$key})) {
6560: $slotinfo{$which} = $remembered{$key};
6561: } else {
6562: %slotinfo=&get('slots',[$which],$cdom,$cnum);
6563: &Apache::lonhomework::showhash(%slotinfo);
6564: my ($tmp)=keys(%slotinfo);
6565: if ($tmp=~/^error:/) { return (); }
6566: $remembered{$key} = $slotinfo{$which};
6567: }
6568: if (ref($slotinfo{$which}) eq 'HASH') {
6569: return %{$slotinfo{$which}};
6570: }
6571: return $slotinfo{$which};
6572: }
6573: # ------------------------------------------------- Update symbolic store links
6574:
6575: sub symblist {
6576: my ($mapname,%newhash)=@_;
6577: $mapname=&deversion(&declutter($mapname));
6578: my %hash;
6579: if (($env{'request.course.fn'}) && (%newhash)) {
6580: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6581: &GDBM_WRCREAT(),0640)) {
6582: foreach my $url (keys %newhash) {
6583: next if ($url eq 'last_known'
6584: && $env{'form.no_update_last_known'});
6585: $hash{declutter($url)}=&encode_symb($mapname,
6586: $newhash{$url}->[1],
6587: $newhash{$url}->[0]);
6588: }
6589: if (untie(%hash)) {
6590: return 'ok';
6591: }
6592: }
6593: }
6594: return 'error';
6595: }
6596:
6597: # --------------------------------------------------------------- Verify a symb
6598:
6599: sub symbverify {
6600: my ($symb,$thisurl)=@_;
6601: my $thisfn=$thisurl;
6602: $thisfn=&declutter($thisfn);
6603: # direct jump to resource in page or to a sequence - will construct own symbs
6604: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
6605: # check URL part
6606: my ($map,$resid,$url)=&decode_symb($symb);
6607:
6608: unless ($url eq $thisfn) { return 0; }
6609:
6610: $symb=&symbclean($symb);
6611: $thisurl=&deversion($thisurl);
6612: $thisfn=&deversion($thisfn);
6613:
6614: my %bighash;
6615: my $okay=0;
6616:
6617: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6618: &GDBM_READER(),0640)) {
6619: my $ids=$bighash{'ids_'.&clutter($thisurl)};
6620: unless ($ids) {
6621: $ids=$bighash{'ids_/'.$thisurl};
6622: }
6623: if ($ids) {
6624: # ------------------------------------------------------------------- Has ID(s)
6625: foreach my $id (split(/\,/,$ids)) {
6626: my ($mapid,$resid)=split(/\./,$id);
6627: if (
6628: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
6629: eq $symb) {
6630: if (($env{'request.role.adv'}) ||
6631: $bighash{'encrypted_'.$id} eq $env{'request.enc'}) {
6632: $okay=1;
6633: }
6634: }
6635: }
6636: }
6637: untie(%bighash);
6638: }
6639: return $okay;
6640: }
6641:
6642: # --------------------------------------------------------------- Clean-up symb
6643:
6644: sub symbclean {
6645: my $symb=shift;
6646: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6647: # remove version from map
6648: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
6649:
6650: # remove version from URL
6651: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
6652:
6653: # remove wrapper
6654:
6655: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
6656: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
6657: return $symb;
6658: }
6659:
6660: # ---------------------------------------------- Split symb to find map and url
6661:
6662: sub encode_symb {
6663: my ($map,$resid,$url)=@_;
6664: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
6665: }
6666:
6667: sub decode_symb {
6668: my $symb=shift;
6669: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6670: my ($map,$resid,$url)=split(/___/,$symb);
6671: return (&fixversion($map),$resid,&fixversion($url));
6672: }
6673:
6674: sub fixversion {
6675: my $fn=shift;
6676: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
6677: my %bighash;
6678: my $uri=&clutter($fn);
6679: my $key=$env{'request.course.id'}.'_'.$uri;
6680: # is this cached?
6681: my ($result,$cached)=&is_cached_new('courseresversion',$key);
6682: if (defined($cached)) { return $result; }
6683: # unfortunately not cached, or expired
6684: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6685: &GDBM_READER(),0640)) {
6686: if ($bighash{'version_'.$uri}) {
6687: my $version=$bighash{'version_'.$uri};
6688: unless (($version eq 'mostrecent') ||
6689: ($version==&getversion($uri))) {
6690: $uri=~s/\.(\w+)$/\.$version\.$1/;
6691: }
6692: }
6693: untie %bighash;
6694: }
6695: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
6696: }
6697:
6698: sub deversion {
6699: my $url=shift;
6700: $url=~s/\.\d+\.(\w+)$/\.$1/;
6701: return $url;
6702: }
6703:
6704: # ------------------------------------------------------ Return symb list entry
6705:
6706: sub symbread {
6707: my ($thisfn,$donotrecurse)=@_;
6708: my $cache_str='request.symbread.cached.'.$thisfn;
6709: if (defined($env{$cache_str})) { return $env{$cache_str}; }
6710: # no filename provided? try from environment
6711: unless ($thisfn) {
6712: if ($env{'request.symb'}) {
6713: return $env{$cache_str}=&symbclean($env{'request.symb'});
6714: }
6715: $thisfn=$env{'request.filename'};
6716: }
6717: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
6718: # is that filename actually a symb? Verify, clean, and return
6719: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
6720: if (&symbverify($thisfn,$1)) {
6721: return $env{$cache_str}=&symbclean($thisfn);
6722: }
6723: }
6724: $thisfn=declutter($thisfn);
6725: my %hash;
6726: my %bighash;
6727: my $syval='';
6728: if (($env{'request.course.fn'}) && ($thisfn)) {
6729: my $targetfn = $thisfn;
6730: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
6731: $targetfn = 'adm/wrapper/'.$thisfn;
6732: }
6733: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
6734: $targetfn=$1;
6735: }
6736: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6737: &GDBM_READER(),0640)) {
6738: $syval=$hash{$targetfn};
6739: untie(%hash);
6740: }
6741: # ---------------------------------------------------------- There was an entry
6742: if ($syval) {
6743: #unless ($syval=~/\_\d+$/) {
6744: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
6745: #&appenv('request.ambiguous' => $thisfn);
6746: #return $env{$cache_str}='';
6747: #}
6748: #$syval.=$1;
6749: #}
6750: } else {
6751: # ------------------------------------------------------- Was not in symb table
6752: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6753: &GDBM_READER(),0640)) {
6754: # ---------------------------------------------- Get ID(s) for current resource
6755: my $ids=$bighash{'ids_'.&clutter($thisfn)};
6756: unless ($ids) {
6757: $ids=$bighash{'ids_/'.$thisfn};
6758: }
6759: unless ($ids) {
6760: # alias?
6761: $ids=$bighash{'mapalias_'.$thisfn};
6762: }
6763: if ($ids) {
6764: # ------------------------------------------------------------------- Has ID(s)
6765: my @possibilities=split(/\,/,$ids);
6766: if ($#possibilities==0) {
6767: # ----------------------------------------------- There is only one possibility
6768: my ($mapid,$resid)=split(/\./,$ids);
6769: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6770: $resid,$thisfn);
6771: } elsif (!$donotrecurse) {
6772: # ------------------------------------------ There is more than one possibility
6773: my $realpossible=0;
6774: foreach my $id (@possibilities) {
6775: my $file=$bighash{'src_'.$id};
6776: if (&allowed('bre',$file)) {
6777: my ($mapid,$resid)=split(/\./,$id);
6778: if ($bighash{'map_type_'.$mapid} ne 'page') {
6779: $realpossible++;
6780: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6781: $resid,$thisfn);
6782: }
6783: }
6784: }
6785: if ($realpossible!=1) { $syval=''; }
6786: } else {
6787: $syval='';
6788: }
6789: }
6790: untie(%bighash)
6791: }
6792: }
6793: if ($syval) {
6794: return $env{$cache_str}=$syval;
6795: }
6796: }
6797: &appenv('request.ambiguous' => $thisfn);
6798: return $env{$cache_str}='';
6799: }
6800:
6801: # ---------------------------------------------------------- Return random seed
6802:
6803: sub numval {
6804: my $txt=shift;
6805: $txt=~tr/A-J/0-9/;
6806: $txt=~tr/a-j/0-9/;
6807: $txt=~tr/K-T/0-9/;
6808: $txt=~tr/k-t/0-9/;
6809: $txt=~tr/U-Z/0-5/;
6810: $txt=~tr/u-z/0-5/;
6811: $txt=~s/\D//g;
6812: if ($_64bit) { if ($txt > 2**32) { return -1; } }
6813: return int($txt);
6814: }
6815:
6816: sub numval2 {
6817: my $txt=shift;
6818: $txt=~tr/A-J/0-9/;
6819: $txt=~tr/a-j/0-9/;
6820: $txt=~tr/K-T/0-9/;
6821: $txt=~tr/k-t/0-9/;
6822: $txt=~tr/U-Z/0-5/;
6823: $txt=~tr/u-z/0-5/;
6824: $txt=~s/\D//g;
6825: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6826: my $total;
6827: foreach my $val (@txts) { $total+=$val; }
6828: if ($_64bit) { if ($total > 2**32) { return -1; } }
6829: return int($total);
6830: }
6831:
6832: sub numval3 {
6833: use integer;
6834: my $txt=shift;
6835: $txt=~tr/A-J/0-9/;
6836: $txt=~tr/a-j/0-9/;
6837: $txt=~tr/K-T/0-9/;
6838: $txt=~tr/k-t/0-9/;
6839: $txt=~tr/U-Z/0-5/;
6840: $txt=~tr/u-z/0-5/;
6841: $txt=~s/\D//g;
6842: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6843: my $total;
6844: foreach my $val (@txts) { $total+=$val; }
6845: if ($_64bit) { $total=(($total<<32)>>32); }
6846: return $total;
6847: }
6848:
6849: sub digest {
6850: my ($data)=@_;
6851: my $digest=&Digest::MD5::md5($data);
6852: my ($a,$b,$c,$d)=unpack("iiii",$digest);
6853: my ($e,$f);
6854: {
6855: use integer;
6856: $e=($a+$b);
6857: $f=($c+$d);
6858: if ($_64bit) {
6859: $e=(($e<<32)>>32);
6860: $f=(($f<<32)>>32);
6861: }
6862: }
6863: if (wantarray) {
6864: return ($e,$f);
6865: } else {
6866: my $g;
6867: {
6868: use integer;
6869: $g=($e+$f);
6870: if ($_64bit) {
6871: $g=(($g<<32)>>32);
6872: }
6873: }
6874: return $g;
6875: }
6876: }
6877:
6878: sub latest_rnd_algorithm_id {
6879: return '64bit5';
6880: }
6881:
6882: sub get_rand_alg {
6883: my ($courseid)=@_;
6884: if (!$courseid) { $courseid=(&whichuser())[1]; }
6885: if ($courseid) {
6886: return $env{"course.$courseid.rndseed"};
6887: }
6888: return &latest_rnd_algorithm_id();
6889: }
6890:
6891: sub validCODE {
6892: my ($CODE)=@_;
6893: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
6894: return 0;
6895: }
6896:
6897: sub getCODE {
6898: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
6899: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
6900: defined($Apache::lonhomework::parsing_a_task) ) &&
6901: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
6902: return $Apache::lonhomework::history{'resource.CODE'};
6903: }
6904: return undef;
6905: }
6906:
6907: sub rndseed {
6908: my ($symb,$courseid,$domain,$username)=@_;
6909:
6910: my ($wsymb,$wcourseid,$wdomain,$wusername)=&whichuser();
6911: if (!$symb) {
6912: unless ($symb=$wsymb) { return time; }
6913: }
6914: if (!$courseid) { $courseid=$wcourseid; }
6915: if (!$domain) { $domain=$wdomain; }
6916: if (!$username) { $username=$wusername }
6917: my $which=&get_rand_alg();
6918:
6919: if (defined(&getCODE())) {
6920: if ($which eq '64bit5') {
6921: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
6922: } elsif ($which eq '64bit4') {
6923: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
6924: } else {
6925: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
6926: }
6927: } elsif ($which eq '64bit5') {
6928: return &rndseed_64bit5($symb,$courseid,$domain,$username);
6929: } elsif ($which eq '64bit4') {
6930: return &rndseed_64bit4($symb,$courseid,$domain,$username);
6931: } elsif ($which eq '64bit3') {
6932: return &rndseed_64bit3($symb,$courseid,$domain,$username);
6933: } elsif ($which eq '64bit2') {
6934: return &rndseed_64bit2($symb,$courseid,$domain,$username);
6935: } elsif ($which eq '64bit') {
6936: return &rndseed_64bit($symb,$courseid,$domain,$username);
6937: }
6938: return &rndseed_32bit($symb,$courseid,$domain,$username);
6939: }
6940:
6941: sub rndseed_32bit {
6942: my ($symb,$courseid,$domain,$username)=@_;
6943: {
6944: use integer;
6945: my $symbchck=unpack("%32C*",$symb) << 27;
6946: my $symbseed=numval($symb) << 22;
6947: my $namechck=unpack("%32C*",$username) << 17;
6948: my $nameseed=numval($username) << 12;
6949: my $domainseed=unpack("%32C*",$domain) << 7;
6950: my $courseseed=unpack("%32C*",$courseid);
6951: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
6952: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6953: #&logthis("rndseed :$num:$symb");
6954: if ($_64bit) { $num=(($num<<32)>>32); }
6955: return $num;
6956: }
6957: }
6958:
6959: sub rndseed_64bit {
6960: my ($symb,$courseid,$domain,$username)=@_;
6961: {
6962: use integer;
6963: my $symbchck=unpack("%32S*",$symb) << 21;
6964: my $symbseed=numval($symb) << 10;
6965: my $namechck=unpack("%32S*",$username);
6966:
6967: my $nameseed=numval($username) << 21;
6968: my $domainseed=unpack("%32S*",$domain) << 10;
6969: my $courseseed=unpack("%32S*",$courseid);
6970:
6971: my $num1=$symbchck+$symbseed+$namechck;
6972: my $num2=$nameseed+$domainseed+$courseseed;
6973: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6974: #&logthis("rndseed :$num:$symb");
6975: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6976: return "$num1,$num2";
6977: }
6978: }
6979:
6980: sub rndseed_64bit2 {
6981: my ($symb,$courseid,$domain,$username)=@_;
6982: {
6983: use integer;
6984: # strings need to be an even # of cahracters long, it it is odd the
6985: # last characters gets thrown away
6986: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6987: my $symbseed=numval($symb) << 10;
6988: my $namechck=unpack("%32S*",$username.' ');
6989:
6990: my $nameseed=numval($username) << 21;
6991: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6992: my $courseseed=unpack("%32S*",$courseid.' ');
6993:
6994: my $num1=$symbchck+$symbseed+$namechck;
6995: my $num2=$nameseed+$domainseed+$courseseed;
6996: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6997: #&logthis("rndseed :$num:$symb");
6998: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6999: return "$num1,$num2";
7000: }
7001: }
7002:
7003: sub rndseed_64bit3 {
7004: my ($symb,$courseid,$domain,$username)=@_;
7005: {
7006: use integer;
7007: # strings need to be an even # of cahracters long, it it is odd the
7008: # last characters gets thrown away
7009: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7010: my $symbseed=numval2($symb) << 10;
7011: my $namechck=unpack("%32S*",$username.' ');
7012:
7013: my $nameseed=numval2($username) << 21;
7014: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7015: my $courseseed=unpack("%32S*",$courseid.' ');
7016:
7017: my $num1=$symbchck+$symbseed+$namechck;
7018: my $num2=$nameseed+$domainseed+$courseseed;
7019: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7020: #&logthis("rndseed :$num1:$num2:$_64bit");
7021: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7022:
7023: return "$num1:$num2";
7024: }
7025: }
7026:
7027: sub rndseed_64bit4 {
7028: my ($symb,$courseid,$domain,$username)=@_;
7029: {
7030: use integer;
7031: # strings need to be an even # of cahracters long, it it is odd the
7032: # last characters gets thrown away
7033: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7034: my $symbseed=numval3($symb) << 10;
7035: my $namechck=unpack("%32S*",$username.' ');
7036:
7037: my $nameseed=numval3($username) << 21;
7038: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7039: my $courseseed=unpack("%32S*",$courseid.' ');
7040:
7041: my $num1=$symbchck+$symbseed+$namechck;
7042: my $num2=$nameseed+$domainseed+$courseseed;
7043: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7044: #&logthis("rndseed :$num1:$num2:$_64bit");
7045: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7046:
7047: return "$num1:$num2";
7048: }
7049: }
7050:
7051: sub rndseed_64bit5 {
7052: my ($symb,$courseid,$domain,$username)=@_;
7053: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
7054: return "$num1:$num2";
7055: }
7056:
7057: sub rndseed_CODE_64bit {
7058: my ($symb,$courseid,$domain,$username)=@_;
7059: {
7060: use integer;
7061: my $symbchck=unpack("%32S*",$symb.' ') << 16;
7062: my $symbseed=numval2($symb);
7063: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
7064: my $CODEseed=numval(&getCODE());
7065: my $courseseed=unpack("%32S*",$courseid.' ');
7066: my $num1=$symbseed+$CODEchck;
7067: my $num2=$CODEseed+$courseseed+$symbchck;
7068: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
7069: #&logthis("rndseed :$num1:$num2:$symb");
7070: if ($_64bit) { $num1=(($num1<<32)>>32); }
7071: if ($_64bit) { $num2=(($num2<<32)>>32); }
7072: return "$num1:$num2";
7073: }
7074: }
7075:
7076: sub rndseed_CODE_64bit4 {
7077: my ($symb,$courseid,$domain,$username)=@_;
7078: {
7079: use integer;
7080: my $symbchck=unpack("%32S*",$symb.' ') << 16;
7081: my $symbseed=numval3($symb);
7082: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
7083: my $CODEseed=numval3(&getCODE());
7084: my $courseseed=unpack("%32S*",$courseid.' ');
7085: my $num1=$symbseed+$CODEchck;
7086: my $num2=$CODEseed+$courseseed+$symbchck;
7087: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
7088: #&logthis("rndseed :$num1:$num2:$symb");
7089: if ($_64bit) { $num1=(($num1<<32)>>32); }
7090: if ($_64bit) { $num2=(($num2<<32)>>32); }
7091: return "$num1:$num2";
7092: }
7093: }
7094:
7095: sub rndseed_CODE_64bit5 {
7096: my ($symb,$courseid,$domain,$username)=@_;
7097: my $code = &getCODE();
7098: my ($num1,$num2)=&digest("$symb,$courseid,$code");
7099: return "$num1:$num2";
7100: }
7101:
7102: sub setup_random_from_rndseed {
7103: my ($rndseed)=@_;
7104: if ($rndseed =~/([,:])/) {
7105: my ($num1,$num2)=split(/[,:]/,$rndseed);
7106: &Math::Random::random_set_seed(abs($num1),abs($num2));
7107: } else {
7108: &Math::Random::random_set_seed_from_phrase($rndseed);
7109: }
7110: }
7111:
7112: sub latest_receipt_algorithm_id {
7113: return 'receipt3';
7114: }
7115:
7116: sub recunique {
7117: my $fucourseid=shift;
7118: my $unique;
7119: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
7120: $env{"course.$fucourseid.receiptalg"} eq 'receipt3' ) {
7121: $unique=$env{"course.$fucourseid.internal.encseed"};
7122: } else {
7123: $unique=$perlvar{'lonReceipt'};
7124: }
7125: return unpack("%32C*",$unique);
7126: }
7127:
7128: sub recprefix {
7129: my $fucourseid=shift;
7130: my $prefix;
7131: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2'||
7132: $env{"course.$fucourseid.receiptalg"} eq 'receipt3' ) {
7133: $prefix=$env{"course.$fucourseid.internal.encpref"};
7134: } else {
7135: $prefix=$perlvar{'lonHostID'};
7136: }
7137: return unpack("%32C*",$prefix);
7138: }
7139:
7140: sub ireceipt {
7141: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
7142:
7143: my $return =&recprefix($fucourseid).'-';
7144:
7145: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt3' ||
7146: $env{'request.state'} eq 'construct') {
7147: $return .= (&digest("$funame,$fudom,$fucourseid,$fusymb,$part")%10000);
7148: return $return;
7149: }
7150:
7151: my $cuname=unpack("%32C*",$funame);
7152: my $cudom=unpack("%32C*",$fudom);
7153: my $cucourseid=unpack("%32C*",$fucourseid);
7154: my $cusymb=unpack("%32C*",$fusymb);
7155: my $cunique=&recunique($fucourseid);
7156: my $cpart=unpack("%32S*",$part);
7157: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
7158:
7159: #&logthis("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname)." and ".($cpart%$cudom));
7160:
7161: $return.= ($cunique%$cuname+
7162: $cunique%$cudom+
7163: $cusymb%$cuname+
7164: $cusymb%$cudom+
7165: $cucourseid%$cuname+
7166: $cucourseid%$cudom+
7167: $cpart%$cuname+
7168: $cpart%$cudom);
7169: } else {
7170: $return.= ($cunique%$cuname+
7171: $cunique%$cudom+
7172: $cusymb%$cuname+
7173: $cusymb%$cudom+
7174: $cucourseid%$cuname+
7175: $cucourseid%$cudom);
7176: }
7177: return $return;
7178: }
7179:
7180: sub receipt {
7181: my ($part)=@_;
7182: my ($symb,$courseid,$domain,$name) = &whichuser();
7183: return &ireceipt($name,$domain,$courseid,$symb,$part);
7184: }
7185:
7186: sub whichuser {
7187: my ($passedsymb)=@_;
7188: my ($symb,$courseid,$domain,$name,$publicuser);
7189: if (defined($env{'form.grade_symb'})) {
7190: my ($tmp_courseid)=&get_env_multiple('form.grade_courseid');
7191: my $allowed=&allowed('vgr',$tmp_courseid);
7192: if (!$allowed &&
7193: exists($env{'request.course.sec'}) &&
7194: $env{'request.course.sec'} !~ /^\s*$/) {
7195: $allowed=&allowed('vgr',$tmp_courseid.
7196: '/'.$env{'request.course.sec'});
7197: }
7198: if ($allowed) {
7199: ($symb)=&get_env_multiple('form.grade_symb');
7200: $courseid=$tmp_courseid;
7201: ($domain)=&get_env_multiple('form.grade_domain');
7202: ($name)=&get_env_multiple('form.grade_username');
7203: return ($symb,$courseid,$domain,$name,$publicuser);
7204: }
7205: }
7206: if (!$passedsymb) {
7207: $symb=&symbread();
7208: } else {
7209: $symb=$passedsymb;
7210: }
7211: $courseid=$env{'request.course.id'};
7212: $domain=$env{'user.domain'};
7213: $name=$env{'user.name'};
7214: if ($name eq 'public' && $domain eq 'public') {
7215: if (!defined($env{'form.username'})) {
7216: $env{'form.username'}.=time.rand(10000000);
7217: }
7218: $name.=$env{'form.username'};
7219: }
7220: return ($symb,$courseid,$domain,$name,$publicuser);
7221:
7222: }
7223:
7224: # ------------------------------------------------------------ Serves up a file
7225: # returns either the contents of the file or
7226: # -1 if the file doesn't exist
7227: #
7228: # if the target is a file that was uploaded via DOCS,
7229: # a check will be made to see if a current copy exists on the local server,
7230: # if it does this will be served, otherwise a copy will be retrieved from
7231: # the home server for the course and stored in /home/httpd/html/userfiles on
7232: # the local server.
7233:
7234: sub getfile {
7235: my ($file) = @_;
7236: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
7237: &repcopy($file);
7238: return &readfile($file);
7239: }
7240:
7241: sub repcopy_userfile {
7242: my ($file)=@_;
7243: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
7244: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
7245: my ($cdom,$cnum,$filename) =
7246: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+($match_domain)/+($match_name)/+(.*)|);
7247: my $uri="/uploaded/$cdom/$cnum/$filename";
7248: if (-e "$file") {
7249: # we already have a local copy, check it out
7250: my @fileinfo = stat($file);
7251: my $rtncode;
7252: my $info;
7253: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
7254: if ($lwpresp ne 'ok') {
7255: # there is no such file anymore, even though we had a local copy
7256: if ($rtncode eq '404') {
7257: unlink($file);
7258: }
7259: return -1;
7260: }
7261: if ($info < $fileinfo[9]) {
7262: # nice, the file we have is up-to-date, just say okay
7263: return 'ok';
7264: } else {
7265: # the file is outdated, get rid of it
7266: unlink($file);
7267: }
7268: }
7269: # one way or the other, at this point, we don't have the file
7270: # construct the correct path for the file
7271: my @parts = ($cdom,$cnum);
7272: if ($filename =~ m|^(.+)/[^/]+$|) {
7273: push @parts, split(/\//,$1);
7274: }
7275: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
7276: foreach my $part (@parts) {
7277: $path .= '/'.$part;
7278: if (!-e $path) {
7279: mkdir($path,0770);
7280: }
7281: }
7282: # now the path exists for sure
7283: # get a user agent
7284: my $ua=new LWP::UserAgent;
7285: my $transferfile=$file.'.in.transfer';
7286: # FIXME: this should flock
7287: if (-e $transferfile) { return 'ok'; }
7288: my $request;
7289: $uri=~s/^\///;
7290: $request=new HTTP::Request('GET','http://'.&hostname(&homeserver($cnum,$cdom)).'/raw/'.$uri);
7291: my $response=$ua->request($request,$transferfile);
7292: # did it work?
7293: if ($response->is_error()) {
7294: unlink($transferfile);
7295: &logthis("Userfile repcopy failed for $uri");
7296: return -1;
7297: }
7298: # worked, rename the transfer file
7299: rename($transferfile,$file);
7300: return 'ok';
7301: }
7302:
7303: sub tokenwrapper {
7304: my $uri=shift;
7305: $uri=~s|^http\://([^/]+)||;
7306: $uri=~s|^/||;
7307: $env{'user.environment'}=~/\/([^\/]+)\.id/;
7308: my $token=$1;
7309: my (undef,$udom,$uname,$file)=split('/',$uri,4);
7310: if ($udom && $uname && $file) {
7311: $file=~s|(\?\.*)*$||;
7312: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
7313: return 'http://'.&hostname(&homeserver($uname,$udom)).'/'.$uri.
7314: (($uri=~/\?/)?'&':'?').'token='.$token.
7315: '&tokenissued='.$perlvar{'lonHostID'};
7316: } else {
7317: return '/adm/notfound.html';
7318: }
7319: }
7320:
7321: # call with reqtype HEAD: get last modification time
7322: # call with reqtype GET: get the file contents
7323: # Do not call this with reqtype GET for large files! It loads everything into memory
7324: #
7325: sub getuploaded {
7326: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
7327: $uri=~s/^\///;
7328: $uri = 'http://'.&hostname(&homeserver($cnum,$cdom)).'/raw/'.$uri;
7329: my $ua=new LWP::UserAgent;
7330: my $request=new HTTP::Request($reqtype,$uri);
7331: my $response=$ua->request($request);
7332: $$rtncode = $response->code;
7333: if (! $response->is_success()) {
7334: return 'failed';
7335: }
7336: if ($reqtype eq 'HEAD') {
7337: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
7338: } elsif ($reqtype eq 'GET') {
7339: $$info = $response->content;
7340: }
7341: return 'ok';
7342: }
7343:
7344: sub readfile {
7345: my $file = shift;
7346: if ( (! -e $file ) || ($file eq '') ) { return -1; };
7347: my $fh;
7348: open($fh,"<$file");
7349: my $a='';
7350: while (my $line = <$fh>) { $a .= $line; }
7351: return $a;
7352: }
7353:
7354: sub filelocation {
7355: my ($dir,$file) = @_;
7356: my $location;
7357: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
7358:
7359: if ($file =~ m-^/adm/-) {
7360: $file=~s-^/adm/wrapper/-/-;
7361: $file=~s-^/adm/coursedocs/showdoc/-/-;
7362: }
7363: if ($file=~m:^/~:) { # is a contruction space reference
7364: $location = $file;
7365: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
7366: } elsif ($file=~m{^/home/$match_username/public_html/}) {
7367: # is a correct contruction space reference
7368: $location = $file;
7369: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
7370: my ($udom,$uname,$filename)=
7371: ($file=~m -^/+(?:uploaded|editupload)/+($match_domain)/+($match_name)/+(.*)$-);
7372: my $home=&homeserver($uname,$udom);
7373: my $is_me=0;
7374: my @ids=¤t_machine_ids();
7375: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
7376: if ($is_me) {
7377: $location=&propath($udom,$uname).
7378: '/userfiles/'.$filename;
7379: } else {
7380: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
7381: $udom.'/'.$uname.'/'.$filename;
7382: }
7383: } else {
7384: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7385: $file=~s:^/res/:/:;
7386: if ( !( $file =~ m:^/:) ) {
7387: $location = $dir. '/'.$file;
7388: } else {
7389: $location = '/home/httpd/html/res'.$file;
7390: }
7391: }
7392: $location=~s://+:/:g; # remove duplicate /
7393: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
7394: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
7395: return $location;
7396: }
7397:
7398: sub hreflocation {
7399: my ($dir,$file)=@_;
7400: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
7401: $file=filelocation($dir,$file);
7402: } elsif ($file=~m-^/adm/-) {
7403: $file=~s-^/adm/wrapper/-/-;
7404: $file=~s-^/adm/coursedocs/showdoc/-/-;
7405: }
7406: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
7407: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
7408: } elsif ($file=~m-/home/($match_username)/public_html/-) {
7409: $file=~s-^/home/($match_username)/public_html/-/~$1/-;
7410: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
7411: $file=~s-^/home/httpd/lonUsers/($match_domain)/./././($match_name)/userfiles/
7412: -/uploaded/$1/$2/-x;
7413: }
7414: return $file;
7415: }
7416:
7417: sub current_machine_domains {
7418: my $hostname=&hostname($perlvar{'lonHostID'});
7419: my @domains;
7420: my %hostname = &all_hostnames();
7421: while( my($id, $name) = each(%hostname)) {
7422: # &logthis("-$id-$name-$hostname-");
7423: if ($hostname eq $name) {
7424: push(@domains,$hostdom{$id});
7425: }
7426: }
7427: return @domains;
7428: }
7429:
7430: sub current_machine_ids {
7431: my $hostname=&hostname($perlvar{'lonHostID'});
7432: my @ids;
7433: my %hostname = &all_hostnames();
7434: while( my($id, $name) = each(%hostname)) {
7435: # &logthis("-$id-$name-$hostname-");
7436: if ($hostname eq $name) {
7437: push(@ids,$id);
7438: }
7439: }
7440: return @ids;
7441: }
7442:
7443: sub additional_machine_domains {
7444: my @domains;
7445: open(my $fh,"<$perlvar{'lonTabDir'}/expected_domains.tab");
7446: while( my $line = <$fh>) {
7447: $line =~ s/\s//g;
7448: push(@domains,$line);
7449: }
7450: return @domains;
7451: }
7452:
7453: sub default_login_domain {
7454: my $domain = $perlvar{'lonDefDomain'};
7455: my $testdomain=(split(/\./,$ENV{'HTTP_HOST'}))[0];
7456: foreach my $posdom (¤t_machine_domains(),
7457: &additional_machine_domains()) {
7458: if (lc($posdom) eq lc($testdomain)) {
7459: $domain=$posdom;
7460: last;
7461: }
7462: }
7463: return $domain;
7464: }
7465:
7466: # ------------------------------------------------------------- Declutters URLs
7467:
7468: sub declutter {
7469: my $thisfn=shift;
7470: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
7471: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7472: $thisfn=~s/^\///;
7473: $thisfn=~s|^adm/wrapper/||;
7474: $thisfn=~s|^adm/coursedocs/showdoc/||;
7475: $thisfn=~s/^res\///;
7476: $thisfn=~s/\?.+$//;
7477: return $thisfn;
7478: }
7479:
7480: # ------------------------------------------------------------- Clutter up URLs
7481:
7482: sub clutter {
7483: my $thisfn='/'.&declutter(shift);
7484: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
7485: $thisfn='/res'.$thisfn;
7486: }
7487: if ($thisfn !~m|/adm|) {
7488: if ($thisfn =~ m|/ext/|) {
7489: $thisfn='/adm/wrapper'.$thisfn;
7490: } else {
7491: my ($ext) = ($thisfn =~ /\.(\w+)$/);
7492: my $embstyle=&Apache::loncommon::fileembstyle($ext);
7493: if ($embstyle eq 'ssi'
7494: || ($embstyle eq 'hdn')
7495: || ($embstyle eq 'rat')
7496: || ($embstyle eq 'prv')
7497: || ($embstyle eq 'ign')) {
7498: #do nothing with these
7499: } elsif (($embstyle eq 'img')
7500: || ($embstyle eq 'emb')
7501: || ($embstyle eq 'wrp')) {
7502: $thisfn='/adm/wrapper'.$thisfn;
7503: } elsif ($embstyle eq 'unk'
7504: && $thisfn!~/\.(sequence|page)$/) {
7505: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
7506: } else {
7507: # &logthis("Got a blank emb style");
7508: }
7509: }
7510: }
7511: return $thisfn;
7512: }
7513:
7514: sub clutter_with_no_wrapper {
7515: my $uri = &clutter(shift);
7516: if ($uri =~ m-^/adm/-) {
7517: $uri =~ s-^/adm/wrapper/-/-;
7518: $uri =~ s-^/adm/coursedocs/showdoc/-/-;
7519: }
7520: return $uri;
7521: }
7522:
7523: sub freeze_escape {
7524: my ($value)=@_;
7525: if (ref($value)) {
7526: $value=&nfreeze($value);
7527: return '__FROZEN__'.&escape($value);
7528: }
7529: return &escape($value);
7530: }
7531:
7532:
7533: sub thaw_unescape {
7534: my ($value)=@_;
7535: if ($value =~ /^__FROZEN__/) {
7536: substr($value,0,10,undef);
7537: $value=&unescape($value);
7538: return &thaw($value);
7539: }
7540: return &unescape($value);
7541: }
7542:
7543: sub correct_line_ends {
7544: my ($result)=@_;
7545: $$result =~s/\r\n/\n/mg;
7546: $$result =~s/\r/\n/mg;
7547: }
7548: # ================================================================ Main Program
7549:
7550: sub goodbye {
7551: &logthis("Starting Shut down");
7552: #not converted to using infrastruture and probably shouldn't be
7553: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
7554: #converted
7555: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
7556: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
7557: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
7558: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
7559: #1.1 only
7560: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
7561: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
7562: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
7563: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
7564: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
7565: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
7566: &logthis(sprintf("%-20s is %s",'hits',$hits));
7567: &flushcourselogs();
7568: &logthis("Shutting down");
7569: }
7570:
7571: BEGIN {
7572: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
7573: unless ($readit) {
7574: {
7575: my $configvars = LONCAPA::Configuration::read_conf('loncapa.conf');
7576: %perlvar = (%perlvar,%{$configvars});
7577: }
7578:
7579: # ------------------------------------------------------------ Read domain file
7580: {
7581: %domaindescription = ();
7582: %domain_auth_def = ();
7583: %domain_auth_arg_def = ();
7584: my $fh;
7585: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
7586: while (my $line = <$fh>) {
7587: next if ($line =~ /^(\#|\s*$)/);
7588: # next if /^\#/;
7589: chomp $line;
7590: my ($domain, $domain_description, $def_auth, $def_auth_arg,
7591: $def_lang, $city, $longi, $lati, $primary) = split(/:/,$line,9);
7592: $domain_auth_def{$domain}=$def_auth;
7593: $domain_auth_arg_def{$domain}=$def_auth_arg;
7594: $domaindescription{$domain}=$domain_description;
7595: $domain_lang_def{$domain}=$def_lang;
7596: $domain_city{$domain}=$city;
7597: $domain_longi{$domain}=$longi;
7598: $domain_lati{$domain}=$lati;
7599: $domain_primary{$domain}=$primary;
7600:
7601: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
7602: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
7603: }
7604: }
7605: close ($fh);
7606: }
7607:
7608:
7609: # ------------------------------------------------------------- Read hosts file
7610: {
7611: my %hostname;
7612: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
7613:
7614: while (my $configline=<$config>) {
7615: next if ($configline =~ /^(\#|\s*$)/);
7616: chomp($configline);
7617: my ($id,$domain,$role,$name)=split(/:/,$configline);
7618: $name=~s/\s//g;
7619: if ($id && $domain && $role && $name) {
7620: $hostname{$id}=$name;
7621: $hostdom{$id}=$domain;
7622: if ($role eq 'library') { $libserv{$id}=$name; }
7623: }
7624: }
7625: close($config);
7626: # FIXME: dev server don't want this, production servers _do_ want this
7627: #&get_iphost();
7628:
7629: sub hostname {
7630: my ($lonid) = @_;
7631: return $hostname{$lonid};
7632: }
7633: sub all_hostnames {
7634: return %hostname;
7635: }
7636: }
7637:
7638: sub get_hosts_from_ip {
7639: my ($ip) = @_;
7640: my %iphosts = &get_iphost();
7641: if (ref($iphosts{$ip})) {
7642: return @{$iphosts{$ip}};
7643: }
7644: return;
7645: }
7646:
7647: sub get_iphost {
7648: if (%iphost) { return %iphost; }
7649: my %name_to_ip;
7650: my %hostname = &all_hostnames();
7651: foreach my $id (keys(%hostname)) {
7652: my $name=$hostname{$id};
7653: my $ip;
7654: if (!exists($name_to_ip{$name})) {
7655: $ip = gethostbyname($name);
7656: if (!$ip || length($ip) ne 4) {
7657: &logthis("Skipping host $id name $name no IP found");
7658: next;
7659: }
7660: $ip=inet_ntoa($ip);
7661: $name_to_ip{$name} = $ip;
7662: } else {
7663: $ip = $name_to_ip{$name};
7664: }
7665: push(@{$iphost{$ip}},$id);
7666: }
7667: return %iphost;
7668: }
7669:
7670: # ------------------------------------------------------ Read spare server file
7671: {
7672: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
7673:
7674: while (my $configline=<$config>) {
7675: chomp($configline);
7676: if ($configline) {
7677: my ($host,$type) = split(':',$configline,2);
7678: if (!defined($type) || $type eq '') { $type = 'default' };
7679: push(@{ $spareid{$type} }, $host);
7680: }
7681: }
7682: close($config);
7683: }
7684: # ------------------------------------------------------------ Read permissions
7685: {
7686: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
7687:
7688: while (my $configline=<$config>) {
7689: chomp($configline);
7690: if ($configline) {
7691: my ($role,$perm)=split(/ /,$configline);
7692: if ($perm ne '') { $pr{$role}=$perm; }
7693: }
7694: }
7695: close($config);
7696: }
7697:
7698: # -------------------------------------------- Read plain texts for permissions
7699: {
7700: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
7701:
7702: while (my $configline=<$config>) {
7703: chomp($configline);
7704: if ($configline) {
7705: my ($short,@plain)=split(/:/,$configline);
7706: %{$prp{$short}} = ();
7707: if (@plain > 0) {
7708: $prp{$short}{'std'} = $plain[0];
7709: for (my $i=1; $i<@plain; $i++) {
7710: $prp{$short}{'alt'.$i} = $plain[$i];
7711: }
7712: }
7713: }
7714: }
7715: close($config);
7716: }
7717:
7718: # ---------------------------------------------------------- Read package table
7719: {
7720: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
7721:
7722: while (my $configline=<$config>) {
7723: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
7724: chomp($configline);
7725: my ($short,$plain)=split(/:/,$configline);
7726: my ($pack,$name)=split(/\&/,$short);
7727: if ($plain ne '') {
7728: $packagetab{$pack.'&'.$name.'&name'}=$name;
7729: $packagetab{$short}=$plain;
7730: }
7731: }
7732: close($config);
7733: }
7734:
7735: # ------------- set up temporary directory
7736: {
7737: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
7738:
7739: }
7740:
7741: $memcache=new Cache::Memcached({'servers' => ['127.0.0.1:11211'],
7742: 'compress_threshold'=> 20_000,
7743: });
7744:
7745: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
7746: $dumpcount=0;
7747:
7748: &logtouch();
7749: &logthis('<font color="yellow">INFO: Read configuration</font>');
7750: $readit=1;
7751: {
7752: use integer;
7753: my $test=(2**32)+1;
7754: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
7755: &logthis(" Detected 64bit platform ($_64bit)");
7756: }
7757: }
7758: }
7759:
7760: 1;
7761: __END__
7762:
7763: =pod
7764:
7765: =head1 NAME
7766:
7767: Apache::lonnet - Subroutines to ask questions about things in the network.
7768:
7769: =head1 SYNOPSIS
7770:
7771: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
7772:
7773: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
7774:
7775: Common parameters:
7776:
7777: =over 4
7778:
7779: =item *
7780:
7781: $uname : an internal username (if $cname expecting a course Id specifically)
7782:
7783: =item *
7784:
7785: $udom : a domain (if $cdom expecting a course's domain specifically)
7786:
7787: =item *
7788:
7789: $symb : a resource instance identifier
7790:
7791: =item *
7792:
7793: $namespace : the name of a .db file that contains the data needed or
7794: being set.
7795:
7796: =back
7797:
7798: =head1 OVERVIEW
7799:
7800: lonnet provides subroutines which interact with the
7801: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
7802: about classes, users, and resources.
7803:
7804: For many of these objects you can also use this to store data about
7805: them or modify them in various ways.
7806:
7807: =head2 Symbs
7808:
7809: To identify a specific instance of a resource, LON-CAPA uses symbols
7810: or "symbs"X<symb>. These identifiers are built from the URL of the
7811: map, the resource number of the resource in the map, and the URL of
7812: the resource itself. The latter is somewhat redundant, but might help
7813: if maps change.
7814:
7815: An example is
7816:
7817: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
7818:
7819: The respective map entry is
7820:
7821: <resource id="19" src="/res/msu/korte/tests/part12.problem"
7822: title="Problem 2">
7823: </resource>
7824:
7825: Symbs are used by the random number generator, as well as to store and
7826: restore data specific to a certain instance of for example a problem.
7827:
7828: =head2 Storing And Retrieving Data
7829:
7830: X<store()>X<cstore()>X<restore()>Three of the most important functions
7831: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
7832: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
7833: is is the non-critical message twin of cstore. These functions are for
7834: handlers to store a perl hash to a user's permanent data space in an
7835: easy manner, and to retrieve it again on another call. It is expected
7836: that a handler would use this once at the beginning to retrieve data,
7837: and then again once at the end to send only the new data back.
7838:
7839: The data is stored in the user's data directory on the user's
7840: homeserver under the ID of the course.
7841:
7842: The hash that is returned by restore will have all of the previous
7843: value for all of the elements of the hash.
7844:
7845: Example:
7846:
7847: #creating a hash
7848: my %hash;
7849: $hash{'foo'}='bar';
7850:
7851: #storing it
7852: &Apache::lonnet::cstore(\%hash);
7853:
7854: #changing a value
7855: $hash{'foo'}='notbar';
7856:
7857: #adding a new value
7858: $hash{'bar'}='foo';
7859: &Apache::lonnet::cstore(\%hash);
7860:
7861: #retrieving the hash
7862: my %history=&Apache::lonnet::restore();
7863:
7864: #print the hash
7865: foreach my $key (sort(keys(%history))) {
7866: print("\%history{$key} = $history{$key}");
7867: }
7868:
7869: Will print out:
7870:
7871: %history{1:foo} = bar
7872: %history{1:keys} = foo:timestamp
7873: %history{1:timestamp} = 990455579
7874: %history{2:bar} = foo
7875: %history{2:foo} = notbar
7876: %history{2:keys} = foo:bar:timestamp
7877: %history{2:timestamp} = 990455580
7878: %history{bar} = foo
7879: %history{foo} = notbar
7880: %history{timestamp} = 990455580
7881: %history{version} = 2
7882:
7883: Note that the special hash entries C<keys>, C<version> and
7884: C<timestamp> were added to the hash. C<version> will be equal to the
7885: total number of versions of the data that have been stored. The
7886: C<timestamp> attribute will be the UNIX time the hash was
7887: stored. C<keys> is available in every historical section to list which
7888: keys were added or changed at a specific historical revision of a
7889: hash.
7890:
7891: B<Warning>: do not store the hash that restore returns directly. This
7892: will cause a mess since it will restore the historical keys as if the
7893: were new keys. I.E. 1:foo will become 1:1:foo etc.
7894:
7895: Calling convention:
7896:
7897: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
7898: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
7899:
7900: For more detailed information, see lonnet specific documentation.
7901:
7902: =head1 RETURN MESSAGES
7903:
7904: =over 4
7905:
7906: =item * B<con_lost>: unable to contact remote host
7907:
7908: =item * B<con_delayed>: unable to contact remote host, message will be delivered
7909: when the connection is brought back up
7910:
7911: =item * B<con_failed>: unable to contact remote host and unable to save message
7912: for later delivery
7913:
7914: =item * B<error:>: an error a occured, a description of the error follows the :
7915:
7916: =item * B<no_such_host>: unable to fund a host associated with the user/domain
7917: that was requested
7918:
7919: =back
7920:
7921: =head1 PUBLIC SUBROUTINES
7922:
7923: =head2 Session Environment Functions
7924:
7925: =over 4
7926:
7927: =item *
7928: X<appenv()>
7929: B<appenv(%hash)>: the value of %hash is written to
7930: the user envirnoment file, and will be restored for each access this
7931: user makes during this session, also modifies the %env for the current
7932: process
7933:
7934: =item *
7935: X<delenv()>
7936: B<delenv($regexp)>: removes all items from the session
7937: environment file that matches the regular expression in $regexp. The
7938: values are also delted from the current processes %env.
7939:
7940: =item * get_env_multiple($name)
7941:
7942: gets $name from the %env hash, it seemlessly handles the cases where multiple
7943: values may be defined and end up as an array ref.
7944:
7945: returns an array of values
7946:
7947: =back
7948:
7949: =head2 User Information
7950:
7951: =over 4
7952:
7953: =item *
7954: X<queryauthenticate()>
7955: B<queryauthenticate($uname,$udom)>: try to determine user's current
7956: authentication scheme
7957:
7958: =item *
7959: X<authenticate()>
7960: B<authenticate($uname,$upass,$udom)>: try to
7961: authenticate user from domain's lib servers (first use the current
7962: one). C<$upass> should be the users password.
7963:
7964: =item *
7965: X<homeserver()>
7966: B<homeserver($uname,$udom)>: find the server which has
7967: the user's directory and files (there must be only one), this caches
7968: the answer, and also caches if there is a borken connection.
7969:
7970: =item *
7971: X<idget()>
7972: B<idget($udom,@ids)>: find the usernames behind a list of IDs
7973: (IDs are a unique resource in a domain, there must be only 1 ID per
7974: username, and only 1 username per ID in a specific domain) (returns
7975: hash: id=>name,id=>name)
7976:
7977: =item *
7978: X<idrget()>
7979: B<idrget($udom,@unames)>: find the IDs behind a list of
7980: usernames (returns hash: name=>id,name=>id)
7981:
7982: =item *
7983: X<idput()>
7984: B<idput($udom,%ids)>: store away a list of names and associated IDs
7985:
7986: =item *
7987: X<rolesinit()>
7988: B<rolesinit($udom,$username,$authhost)>: get user privileges
7989:
7990: =item *
7991: X<getsection()>
7992: B<getsection($udom,$uname,$cname)>: finds the section of student in the
7993: course $cname, return section name/number or '' for "not in course"
7994: and '-1' for "no section"
7995:
7996: =item *
7997: X<userenvironment()>
7998: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
7999: passed in @what from the requested user's environment, returns a hash
8000:
8001: =back
8002:
8003: =head2 User Roles
8004:
8005: =over 4
8006:
8007: =item *
8008:
8009: allowed($priv,$uri,$symb,$role) : check for a user privilege; returns codes for allowed actions
8010: F: full access
8011: U,I,K: authentication modes (cxx only)
8012: '': forbidden
8013: 1: user needs to choose course
8014: 2: browse allowed
8015: A: passphrase authentication needed
8016:
8017: =item *
8018:
8019: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
8020: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
8021: and course level
8022:
8023: =item *
8024:
8025: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
8026: explanation of a user role term
8027:
8028: =item *
8029:
8030: get_my_roles($uname,$udom,$types,$roles,$roledoms) : All arguments are
8031: optional. Returns a hash of a user's roles, with keys set to
8032: colon-sparated $uname,$udom,and $role, and value set to
8033: colon-separated start and end times for the role. If no username and
8034: domain are specified, will default to current user/domain. Types,
8035: roles, and roledoms are references to arrays, of role statuses
8036: (active, future or previous), roles (e.g., cc,in, st etc.) and domains
8037: of the roles which can be used to restrict the list if roles
8038: reported. If no array ref is provided for types, will default to
8039: return only active roles.
8040:
8041: =back
8042:
8043: =head2 User Modification
8044:
8045: =over 4
8046:
8047: =item *
8048:
8049: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
8050: user for the level given by URL. Optional start and end dates (leave empty
8051: string or zero for "no date")
8052:
8053: =item *
8054:
8055: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
8056: change a users, password, possible return values are: ok,
8057: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
8058: refused
8059:
8060: =item *
8061:
8062: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
8063:
8064: =item *
8065:
8066: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
8067: modify user
8068:
8069: =item *
8070:
8071: modifystudent
8072:
8073: modify a students enrollment and identification information.
8074: The course id is resolved based on the current users environment.
8075: This means the envoking user must be a course coordinator or otherwise
8076: associated with a course.
8077:
8078: This call is essentially a wrapper for lonnet::modifyuser and
8079: lonnet::modify_student_enrollment
8080:
8081: Inputs:
8082:
8083: =over 4
8084:
8085: =item B<$udom> Students loncapa domain
8086:
8087: =item B<$uname> Students loncapa login name
8088:
8089: =item B<$uid> Students id/student number
8090:
8091: =item B<$umode> Students authentication mode
8092:
8093: =item B<$upass> Students password
8094:
8095: =item B<$first> Students first name
8096:
8097: =item B<$middle> Students middle name
8098:
8099: =item B<$last> Students last name
8100:
8101: =item B<$gene> Students generation
8102:
8103: =item B<$usec> Students section in course
8104:
8105: =item B<$end> Unix time of the roles expiration
8106:
8107: =item B<$start> Unix time of the roles start date
8108:
8109: =item B<$forceid> If defined, allow $uid to be changed
8110:
8111: =item B<$desiredhome> server to use as home server for student
8112:
8113: =back
8114:
8115: =item *
8116:
8117: modify_student_enrollment
8118:
8119: Change a students enrollment status in a class. The environment variable
8120: 'role.request.course' must be defined for this function to proceed.
8121:
8122: Inputs:
8123:
8124: =over 4
8125:
8126: =item $udom, students domain
8127:
8128: =item $uname, students name
8129:
8130: =item $uid, students user id
8131:
8132: =item $first, students first name
8133:
8134: =item $middle
8135:
8136: =item $last
8137:
8138: =item $gene
8139:
8140: =item $usec
8141:
8142: =item $end
8143:
8144: =item $start
8145:
8146: =back
8147:
8148:
8149: =item *
8150:
8151: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
8152: custom role; give a custom role to a user for the level given by URL. Specify
8153: name and domain of role author, and role name
8154:
8155: =item *
8156:
8157: revokerole($udom,$uname,$url,$role) : revoke a role for url
8158:
8159: =item *
8160:
8161: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
8162:
8163: =back
8164:
8165: =head2 Course Infomation
8166:
8167: =over 4
8168:
8169: =item *
8170:
8171: coursedescription($courseid) : returns a hash of information about the
8172: specified course id, including all environment settings for the
8173: course, the description of the course will be in the hash under the
8174: key 'description'
8175:
8176: =item *
8177:
8178: resdata($name,$domain,$type,@which) : request for current parameter
8179: setting for a specific $type, where $type is either 'course' or 'user',
8180: @what should be a list of parameters to ask about. This routine caches
8181: answers for 5 minutes.
8182:
8183: =back
8184:
8185: =head2 Course Modification
8186:
8187: =over 4
8188:
8189: =item *
8190:
8191: writecoursepref($courseid,%prefs) : write preferences (environment
8192: database) for a course
8193:
8194: =item *
8195:
8196: createcourse($udom,$description,$url) : make/modify course
8197:
8198: =back
8199:
8200: =head2 Resource Subroutines
8201:
8202: =over 4
8203:
8204: =item *
8205:
8206: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
8207:
8208: =item *
8209:
8210: repcopy($filename) : subscribes to the requested file, and attempts to
8211: replicate from the owning library server, Might return
8212: 'unavailable', 'not_found', 'forbidden', 'ok', or
8213: 'bad_request', also attempts to grab the metadata for the
8214: resource. Expects the local filesystem pathname
8215: (/home/httpd/html/res/....)
8216:
8217: =back
8218:
8219: =head2 Resource Information
8220:
8221: =over 4
8222:
8223: =item *
8224:
8225: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
8226: a vairety of different possible values, $varname should be a request
8227: string, and the other parameters can be used to specify who and what
8228: one is asking about.
8229:
8230: Possible values for $varname are environment.lastname (or other item
8231: from the envirnment hash), user.name (or someother aspect about the
8232: user), resource.0.maxtries (or some other part and parameter of a
8233: resource)
8234:
8235: =item *
8236:
8237: directcondval($number) : get current value of a condition; reads from a state
8238: string
8239:
8240: =item *
8241:
8242: condval($condidx) : value of condition index based on state
8243:
8244: =item *
8245:
8246: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
8247: resource's metadata, $what should be either a specific key, or either
8248: 'keys' (to get a list of possible keys) or 'packages' to get a list of
8249: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
8250:
8251: this function automatically caches all requests
8252:
8253: =item *
8254:
8255: metadata_query($query,$custom,$customshow) : make a metadata query against the
8256: network of library servers; returns file handle of where SQL and regex results
8257: will be stored for query
8258:
8259: =item *
8260:
8261: symbread($filename) : return symbolic list entry (filename argument optional);
8262: returns the data handle
8263:
8264: =item *
8265:
8266: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
8267: a possible symb for the URL in $thisfn, and if is an encryypted
8268: resource that the user accessed using /enc/ returns a 1 on success, 0
8269: on failure, user must be in a course, as it assumes the existance of
8270: the course initial hash, and uses $env('request.course.id'}
8271:
8272:
8273: =item *
8274:
8275: symbclean($symb) : removes versions numbers from a symb, returns the
8276: cleaned symb
8277:
8278: =item *
8279:
8280: is_on_map($uri) : checks if the $uri is somewhere on the current
8281: course map, user must be in a course for it to work.
8282:
8283: =item *
8284:
8285: numval($salt) : return random seed value (addend for rndseed)
8286:
8287: =item *
8288:
8289: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
8290: a random seed, all arguments are optional, if they aren't sent it uses the
8291: environment to derive them. Note: if symb isn't sent and it can't get one
8292: from &symbread it will use the current time as its return value
8293:
8294: =item *
8295:
8296: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
8297: unfakeable, receipt
8298:
8299: =item *
8300:
8301: receipt() : API to ireceipt working off of env values; given out to users
8302:
8303: =item *
8304:
8305: countacc($url) : count the number of accesses to a given URL
8306:
8307: =item *
8308:
8309: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
8310:
8311: =item *
8312:
8313: checkin($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 $tcrsid)
8314:
8315: =item *
8316:
8317: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
8318:
8319: =item *
8320:
8321: devalidate($symb) : devalidate temporary spreadsheet calculations,
8322: forcing spreadsheet to reevaluate the resource scores next time.
8323:
8324: =back
8325:
8326: =head2 Storing/Retreiving Data
8327:
8328: =over 4
8329:
8330: =item *
8331:
8332: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
8333: for this url; hashref needs to be given and should be a \%hashname; the
8334: remaining args aren't required and if they aren't passed or are '' they will
8335: be derived from the env
8336:
8337: =item *
8338:
8339: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
8340: uses critical subroutine
8341:
8342: =item *
8343:
8344: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
8345: all args are optional
8346:
8347: =item *
8348:
8349: dumpstore($namespace,$udom,$uname,$regexp,$range) :
8350: dumps the complete (or key matching regexp) namespace into a hash
8351: ($udom, $uname, $regexp, $range are optional) for a namespace that is
8352: normally &store()ed into
8353:
8354: $range should be either an integer '100' (give me the first 100
8355: matching records)
8356: or be two integers sperated by a - with no spaces
8357: '30-50' (give me the 30th through the 50th matching
8358: records)
8359:
8360:
8361: =item *
8362:
8363: putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
8364: replaces a &store() version of data with a replacement set of data
8365: for a particular resource in a namespace passed in the $storehash hash
8366: reference
8367:
8368: =item *
8369:
8370: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
8371: works very similar to store/cstore, but all data is stored in a
8372: temporary location and can be reset using tmpreset, $storehash should
8373: be a hash reference, returns nothing on success
8374:
8375: =item *
8376:
8377: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
8378: similar to restore, but all data is stored in a temporary location and
8379: can be reset using tmpreset. Returns a hash of values on success,
8380: error string otherwise.
8381:
8382: =item *
8383:
8384: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
8385: deltes all keys for $symb form the temporary storage hash.
8386:
8387: =item *
8388:
8389: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
8390: reference filled in from namesp ($udom and $uname are optional)
8391:
8392: =item *
8393:
8394: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
8395: namesp ($udom and $uname are optional)
8396:
8397: =item *
8398:
8399: dump($namespace,$udom,$uname,$regexp,$range) :
8400: dumps the complete (or key matching regexp) namespace into a hash
8401: ($udom, $uname, $regexp, $range are optional)
8402:
8403: $range should be either an integer '100' (give me the first 100
8404: matching records)
8405: or be two integers sperated by a - with no spaces
8406: '30-50' (give me the 30th through the 50th matching
8407: records)
8408: =item *
8409:
8410: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
8411: $store can be a scalar, an array reference, or if the amount to be
8412: incremented is > 1, a hash reference.
8413:
8414: ($udom and $uname are optional)
8415:
8416: =item *
8417:
8418: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
8419: ($udom and $uname are optional)
8420:
8421: =item *
8422:
8423: cput($namespace,$storehash,$udom,$uname) : critical put
8424: ($udom and $uname are optional)
8425:
8426: =item *
8427:
8428: newput($namespace,$storehash,$udom,$uname) :
8429:
8430: Attempts to store the items in the $storehash, but only if they don't
8431: currently exist, if this succeeds you can be certain that you have
8432: successfully created a new key value pair in the $namespace db.
8433:
8434:
8435: Args:
8436: $namespace: name of database to store values to
8437: $storehash: hashref to store to the db
8438: $udom: (optional) domain of user containing the db
8439: $uname: (optional) name of user caontaining the db
8440:
8441: Returns:
8442: 'ok' -> succeeded in storing all keys of $storehash
8443: 'key_exists: <key>' -> failed to anything out of $storehash, as at
8444: least <key> already existed in the db (other
8445: requested keys may also already exist)
8446: 'error: <msg>' -> unable to tie the DB or other erorr occured
8447: 'con_lost' -> unable to contact request server
8448: 'refused' -> action was not allowed by remote machine
8449:
8450:
8451: =item *
8452:
8453: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
8454: reference filled in from namesp (encrypts the return communication)
8455: ($udom and $uname are optional)
8456:
8457: =item *
8458:
8459: log($udom,$name,$home,$message) : write to permanent log for user; use
8460: critical subroutine
8461:
8462: =item *
8463:
8464: get_dom($namespace,$storearr,$udomain) : returns hash with keys from array
8465: reference filled in from namespace found in domain level on primary domain server ($udomain is optional)
8466:
8467: =item *
8468:
8469: put_dom($namespace,$storehash,$udomain) : stores hash in namespace at domain level on primary domain server ($udomain is optional)
8470:
8471: =back
8472:
8473: =head2 Network Status Functions
8474:
8475: =over 4
8476:
8477: =item *
8478:
8479: dirlist($uri) : return directory list based on URI
8480:
8481: =item *
8482:
8483: spareserver() : find server with least workload from spare.tab
8484:
8485: =back
8486:
8487: =head2 Apache Request
8488:
8489: =over 4
8490:
8491: =item *
8492:
8493: ssi($url,%hash) : server side include, does a complete request cycle on url to
8494: localhost, posts hash
8495:
8496: =back
8497:
8498: =head2 Data to String to Data
8499:
8500: =over 4
8501:
8502: =item *
8503:
8504: hash2str(%hash) : convert a hash into a string complete with escaping and '='
8505: and '&' separators, supports elements that are arrayrefs and hashrefs
8506:
8507: =item *
8508:
8509: hashref2str($hashref) : convert a hashref into a string complete with
8510: escaping and '=' and '&' separators, supports elements that are
8511: arrayrefs and hashrefs
8512:
8513: =item *
8514:
8515: arrayref2str($arrayref) : convert an arrayref into a string complete
8516: with escaping and '&' separators, supports elements that are arrayrefs
8517: and hashrefs
8518:
8519: =item *
8520:
8521: str2hash($string) : convert string to hash using unescaping and
8522: splitting on '=' and '&', supports elements that are arrayrefs and
8523: hashrefs
8524:
8525: =item *
8526:
8527: str2array($string) : convert string to hash using unescaping and
8528: splitting on '&', supports elements that are arrayrefs and hashrefs
8529:
8530: =back
8531:
8532: =head2 Logging Routines
8533:
8534: =over 4
8535:
8536: These routines allow one to make log messages in the lonnet.log and
8537: lonnet.perm logfiles.
8538:
8539: =item *
8540:
8541: logtouch() : make sure the logfile, lonnet.log, exists
8542:
8543: =item *
8544:
8545: logthis() : append message to the normal lonnet.log file, it gets
8546: preiodically rolled over and deleted.
8547:
8548: =item *
8549:
8550: logperm() : append a permanent message to lonnet.perm.log, this log
8551: file never gets deleted by any automated portion of the system, only
8552: messages of critical importance should go in here.
8553:
8554: =back
8555:
8556: =head2 General File Helper Routines
8557:
8558: =over 4
8559:
8560: =item *
8561:
8562: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
8563: (a) files in /uploaded
8564: (i) If a local copy of the file exists -
8565: compares modification date of local copy with last-modified date for
8566: definitive version stored on home server for course. If local copy is
8567: stale, requests a new version from the home server and stores it.
8568: If the original has been removed from the home server, then local copy
8569: is unlinked.
8570: (ii) If local copy does not exist -
8571: requests the file from the home server and stores it.
8572:
8573: If $caller is 'uploadrep':
8574: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
8575: for request for files originally uploaded via DOCS.
8576: - returns 'ok' if fresh local copy now available, -1 otherwise.
8577:
8578: Otherwise:
8579: This indicates a call from the content generation phase of the request.
8580: - returns the entire contents of the file or -1.
8581:
8582: (b) files in /res
8583: - returns the entire contents of a file or -1;
8584: it properly subscribes to and replicates the file if neccessary.
8585:
8586:
8587: =item *
8588:
8589: stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
8590: reference
8591:
8592: returns either a stat() list of data about the file or an empty list
8593: if the file doesn't exist or couldn't find out about it (connection
8594: problems or user unknown)
8595:
8596: =item *
8597:
8598: filelocation($dir,$file) : returns file system location of a file
8599: based on URI; meant to be "fairly clean" absolute reference, $dir is a
8600: directory that relative $file lookups are to looked in ($dir of /a/dir
8601: and a file of ../bob will become /a/bob)
8602:
8603: =item *
8604:
8605: hreflocation($dir,$file) : returns file system location or a URL; same as
8606: filelocation except for hrefs
8607:
8608: =item *
8609:
8610: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
8611:
8612: =back
8613:
8614: =head2 Usererfile file routines (/uploaded*)
8615:
8616: =over 4
8617:
8618: =item *
8619:
8620: userfileupload(): main rotine for putting a file in a user or course's
8621: filespace, arguments are,
8622:
8623: formname - required - this is the name of the element in $env where the
8624: filename, and the contents of the file to create/modifed exist
8625: the filename is in $env{'form.'.$formname.'.filename'} and the
8626: contents of the file is located in $env{'form.'.$formname}
8627: coursedoc - if true, store the file in the course of the active role
8628: of the current user
8629: subdir - required - subdirectory to put the file in under ../userfiles/
8630: if undefined, it will be placed in "unknown"
8631:
8632: (This routine calls clean_filename() to remove any dangerous
8633: characters from the filename, and then calls finuserfileupload() to
8634: complete the transaction)
8635:
8636: returns either the url of the uploaded file (/uploaded/....) if successful
8637: and /adm/notfound.html if unsuccessful
8638:
8639: =item *
8640:
8641: clean_filename(): routine for cleaing a filename up for storage in
8642: userfile space, argument is:
8643:
8644: filename - proposed filename
8645:
8646: returns: the new clean filename
8647:
8648: =item *
8649:
8650: finishuserfileupload(): routine that creaes and sends the file to
8651: userspace, probably shouldn't be called directly
8652:
8653: docuname: username or courseid of destination for the file
8654: docudom: domain of user/course of destination for the file
8655: formname: same as for userfileupload()
8656: fname: filename (inculding subdirectories) for the file
8657:
8658: returns either the url of the uploaded file (/uploaded/....) if successful
8659: and /adm/notfound.html if unsuccessful
8660:
8661: =item *
8662:
8663: renameuserfile(): renames an existing userfile to a new name
8664:
8665: Args:
8666: docuname: username or courseid of destination for the file
8667: docudom: domain of user/course of destination for the file
8668: old: current file name (including any subdirs under userfiles)
8669: new: desired file name (including any subdirs under userfiles)
8670:
8671: =item *
8672:
8673: mkdiruserfile(): creates a directory is a userfiles dir
8674:
8675: Args:
8676: docuname: username or courseid of destination for the file
8677: docudom: domain of user/course of destination for the file
8678: dir: dir to create (including any subdirs under userfiles)
8679:
8680: =item *
8681:
8682: removeuserfile(): removes a file that exists in userfiles
8683:
8684: Args:
8685: docuname: username or courseid of destination for the file
8686: docudom: domain of user/course of destination for the file
8687: fname: filname to delete (including any subdirs under userfiles)
8688:
8689: =item *
8690:
8691: removeuploadedurl(): convience function for removeuserfile()
8692:
8693: Args:
8694: url: a full /uploaded/... url to delete
8695:
8696: =item *
8697:
8698: get_portfile_permissions():
8699: Args:
8700: domain: domain of user or course contain the portfolio files
8701: user: name of user or num of course contain the portfolio files
8702: Returns:
8703: hashref of a dump of the proper file_permissions.db
8704:
8705:
8706: =item *
8707:
8708: get_access_controls():
8709:
8710: Args:
8711: current_permissions: the hash ref returned from get_portfile_permissions()
8712: group: (optional) the group you want the files associated with
8713: file: (optional) the file you want access info on
8714:
8715: Returns:
8716: a hash (keys are file names) of hashes containing
8717: keys are: path to file/file_name\0uniqueID:scope_end_start (see below)
8718: values are XML containing access control settings (see below)
8719:
8720: Internal notes:
8721:
8722: access controls are stored in file_permissions.db as key=value pairs.
8723: key -> path to file/file_name\0uniqueID:scope_end_start
8724: where scope -> public,guest,course,group,domains or users.
8725: end -> UNIX time for end of access (0 -> no end date)
8726: start -> UNIX time for start of access
8727:
8728: value -> XML description of access control
8729: <scope type=""> (type =1 of: public,guest,course,group,domains,users">
8730: <start></start>
8731: <end></end>
8732:
8733: <password></password> for scope type = guest
8734:
8735: <domain></domain> for scope type = course or group
8736: <number></number>
8737: <roles id="">
8738: <role></role>
8739: <access></access>
8740: <section></section>
8741: <group></group>
8742: </roles>
8743:
8744: <dom></dom> for scope type = domains
8745:
8746: <users> for scope type = users
8747: <user>
8748: <uname></uname>
8749: <udom></udom>
8750: </user>
8751: </users>
8752: </scope>
8753:
8754: Access data is also aggregated for each file in an additional key=value pair:
8755: key -> path to file/file_name\0accesscontrol
8756: value -> reference to hash
8757: hash contains key = value pairs
8758: where key = uniqueID:scope_end_start
8759: value = UNIX time record was last updated
8760:
8761: Used to improve speed of look-ups of access controls for each file.
8762:
8763: Locks on files (resulting from submission of portfolio file to a homework problem stored in array of arrays.
8764:
8765: modify_access_controls():
8766:
8767: Modifies access controls for a portfolio file
8768: Args
8769: 1. file name
8770: 2. reference to hash of required changes,
8771: 3. domain
8772: 4. username
8773: where domain,username are the domain of the portfolio owner
8774: (either a user or a course)
8775:
8776: Returns:
8777: 1. result of additions or updates ('ok' or 'error', with error message).
8778: 2. result of deletions ('ok' or 'error', with error message).
8779: 3. reference to hash of any new or updated access controls.
8780: 4. reference to hash used to map incoming IDs to uniqueIDs assigned to control.
8781: key = integer (inbound ID)
8782: value = uniqueID
8783:
8784: =back
8785:
8786: =head2 HTTP Helper Routines
8787:
8788: =over 4
8789:
8790: =item *
8791:
8792: escape() : unpack non-word characters into CGI-compatible hex codes
8793:
8794: =item *
8795:
8796: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
8797:
8798: =back
8799:
8800: =head1 PRIVATE SUBROUTINES
8801:
8802: =head2 Underlying communication routines (Shouldn't call)
8803:
8804: =over 4
8805:
8806: =item *
8807:
8808: subreply() : tries to pass a message to lonc, returns con_lost if incapable
8809:
8810: =item *
8811:
8812: reply() : uses subreply to send a message to remote machine, logs all failures
8813:
8814: =item *
8815:
8816: critical() : passes a critical message to another server; if cannot
8817: get through then place message in connection buffer directory and
8818: returns con_delayed, if incapable of saving message, returns
8819: con_failed
8820:
8821: =item *
8822:
8823: reconlonc() : tries to reconnect lonc client processes.
8824:
8825: =back
8826:
8827: =head2 Resource Access Logging
8828:
8829: =over 4
8830:
8831: =item *
8832:
8833: flushcourselogs() : flush (save) buffer logs and access logs
8834:
8835: =item *
8836:
8837: courselog($what) : save message for course in hash
8838:
8839: =item *
8840:
8841: courseacclog($what) : save message for course using &courselog(). Perform
8842: special processing for specific resource types (problems, exams, quizzes, etc).
8843:
8844: =item *
8845:
8846: goodbye() : flush course logs and log shutting down; it is called in srm.conf
8847: as a PerlChildExitHandler
8848:
8849: =back
8850:
8851: =head2 Other
8852:
8853: =over 4
8854:
8855: =item *
8856:
8857: symblist($mapname,%newhash) : update symbolic storage links
8858:
8859: =back
8860:
8861: =cut
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