1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.731 2006/04/26 14:50:56 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 %hostname %badServerCache %iphost %spareid %hostdom
39: %libserv %pr %prp $memcache %packagetab
40: %courselogs %accesshash %userrolehash %domainrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf
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:
56: my $readit;
57: my $max_connection_retries = 10; # Or some such value.
58:
59: require Exporter;
60:
61: our @ISA = qw (Exporter);
62: our @EXPORT = qw(%env);
63:
64: =pod
65:
66: =head1 Package Variables
67:
68: These are largely undocumented, so if you decipher one please note it here.
69:
70: =over 4
71:
72: =item $processmarker
73:
74: Contains the time this process was started and this servers host id.
75:
76: =item $dumpcount
77:
78: Counts the number of times a message log flush has been attempted (regardless
79: of success) by this process. Used as part of the filename when messages are
80: delayed.
81:
82: =back
83:
84: =cut
85:
86:
87: # --------------------------------------------------------------------- Logging
88: {
89: my $logid;
90: sub instructor_log {
91: my ($hash_name,$storehash,$delflag,$uname,$udom)=@_;
92: $logid++;
93: my $id=time().'00000'.$$.'00000'.$logid;
94: return &Apache::lonnet::put('nohist_'.$hash_name,
95: { $id => {
96: 'exe_uname' => $env{'user.name'},
97: 'exe_udom' => $env{'user.domain'},
98: 'exe_time' => time(),
99: 'exe_ip' => $ENV{'REMOTE_ADDR'},
100: 'delflag' => $delflag,
101: 'logentry' => $storehash,
102: 'uname' => $uname,
103: 'udom' => $udom,
104: }
105: },
106: $env{'course.'.$env{'request.course.id'}.'.domain'},
107: $env{'course.'.$env{'request.course.id'}.'.num'}
108: );
109: }
110: }
111:
112: sub logtouch {
113: my $execdir=$perlvar{'lonDaemons'};
114: unless (-e "$execdir/logs/lonnet.log") {
115: open(my $fh,">>$execdir/logs/lonnet.log");
116: close $fh;
117: }
118: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
119: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
120: }
121:
122: sub logthis {
123: my $message=shift;
124: my $execdir=$perlvar{'lonDaemons'};
125: my $now=time;
126: my $local=localtime($now);
127: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
128: print $fh "$local ($$): $message\n";
129: close($fh);
130: }
131: return 1;
132: }
133:
134: sub logperm {
135: my $message=shift;
136: my $execdir=$perlvar{'lonDaemons'};
137: my $now=time;
138: my $local=localtime($now);
139: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
140: print $fh "$now:$message:$local\n";
141: close($fh);
142: }
143: return 1;
144: }
145:
146: # -------------------------------------------------- Non-critical communication
147: sub subreply {
148: my ($cmd,$server)=@_;
149: my $peerfile="$perlvar{'lonSockDir'}/".$hostname{$server};
150: #
151: # With loncnew process trimming, there's a timing hole between lonc server
152: # process exit and the master server picking up the listen on the AF_UNIX
153: # socket. In that time interval, a lock file will exist:
154:
155: my $lockfile=$peerfile.".lock";
156: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
157: sleep(1);
158: }
159: # At this point, either a loncnew parent is listening or an old lonc
160: # or loncnew child is listening so we can connect or everything's dead.
161: #
162: # We'll give the connection a few tries before abandoning it. If
163: # connection is not possible, we'll con_lost back to the client.
164: #
165: my $client;
166: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
167: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
168: Type => SOCK_STREAM,
169: Timeout => 10);
170: if($client) {
171: last; # Connected!
172: }
173: sleep(1); # Try again later if failed connection.
174: }
175: my $answer;
176: if ($client) {
177: print $client "sethost:$server:$cmd\n";
178: $answer=<$client>;
179: if (!$answer) { $answer="con_lost"; }
180: chomp($answer);
181: } else {
182: $answer = 'con_lost'; # Failed connection.
183: }
184: return $answer;
185: }
186:
187: sub reply {
188: my ($cmd,$server)=@_;
189: unless (defined($hostname{$server})) { return 'no_such_host'; }
190: my $answer=subreply($cmd,$server);
191: &Apache::lonnet::logthis("$cmd");
192: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
193: &logthis("<font color=\"blue\">WARNING:".
194: " $cmd to $server returned $answer</font>");
195: }
196: return $answer;
197: }
198:
199: # ----------------------------------------------------------- Send USR1 to lonc
200:
201: sub reconlonc {
202: my $peerfile=shift;
203: &logthis("Trying to reconnect for $peerfile");
204: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
205: if (open(my $fh,"<$loncfile")) {
206: my $loncpid=<$fh>;
207: chomp($loncpid);
208: if (kill 0 => $loncpid) {
209: &logthis("lonc at pid $loncpid responding, sending USR1");
210: kill USR1 => $loncpid;
211: sleep 1;
212: if (-e "$peerfile") { return; }
213: &logthis("$peerfile still not there, give it another try");
214: sleep 5;
215: if (-e "$peerfile") { return; }
216: &logthis(
217: "<font color=\"blue\">WARNING: $peerfile still not there, giving up</font>");
218: } else {
219: &logthis(
220: "<font color=\"blue\">WARNING:".
221: " lonc at pid $loncpid not responding, giving up</font>");
222: }
223: } else {
224: &logthis('<font color="blue">WARNING: lonc not running, giving up</font>');
225: }
226: }
227:
228: # ------------------------------------------------------ Critical communication
229:
230: sub critical {
231: my ($cmd,$server)=@_;
232: unless ($hostname{$server}) {
233: &logthis("<font color=\"blue\">WARNING:".
234: " Critical message to unknown server ($server)</font>");
235: return 'no_such_host';
236: }
237: my $answer=reply($cmd,$server);
238: if ($answer eq 'con_lost') {
239: &reconlonc("$perlvar{'lonSockDir'}/$server");
240: my $answer=reply($cmd,$server);
241: if ($answer eq 'con_lost') {
242: my $now=time;
243: my $middlename=$cmd;
244: $middlename=substr($middlename,0,16);
245: $middlename=~s/\W//g;
246: my $dfilename=
247: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
248: $dumpcount++;
249: {
250: my $dfh;
251: if (open($dfh,">$dfilename")) {
252: print $dfh "$cmd\n";
253: close($dfh);
254: }
255: }
256: sleep 2;
257: my $wcmd='';
258: {
259: my $dfh;
260: if (open($dfh,"<$dfilename")) {
261: $wcmd=<$dfh>;
262: close($dfh);
263: }
264: }
265: chomp($wcmd);
266: if ($wcmd eq $cmd) {
267: &logthis("<font color=\"blue\">WARNING: ".
268: "Connection buffer $dfilename: $cmd</font>");
269: &logperm("D:$server:$cmd");
270: return 'con_delayed';
271: } else {
272: &logthis("<font color=\"red\">CRITICAL:"
273: ." Critical connection failed: $server $cmd</font>");
274: &logperm("F:$server:$cmd");
275: return 'con_failed';
276: }
277: }
278: }
279: return $answer;
280: }
281:
282: # ------------------------------------------- Transfer profile into environment
283:
284: sub transfer_profile_to_env {
285: my ($lonidsdir,$handle)=@_;
286: if (!defined($lonidsdir)) {
287: $lonidsdir = $perlvar{'lonIDsDir'};
288: }
289: if (!defined($handle)) {
290: ($handle) = ($env{'user.environment'} =~m|/([^/]+)\.id$| );
291: }
292:
293: my @profile;
294: {
295: open(my $idf,"$lonidsdir/$handle.id");
296: flock($idf,LOCK_SH);
297: @profile=<$idf>;
298: close($idf);
299: }
300: my $envi;
301: my %Remove;
302: for ($envi=0;$envi<=$#profile;$envi++) {
303: chomp($profile[$envi]);
304: my ($envname,$envvalue)=split(/=/,$profile[$envi],2);
305: $envname=&unescape($envname);
306: $envvalue=&unescape($envvalue);
307: $env{$envname} = $envvalue;
308: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
309: if ($time < time-300) {
310: $Remove{$key}++;
311: }
312: }
313: }
314: $env{'user.environment'} = "$lonidsdir/$handle.id";
315: foreach my $expired_key (keys(%Remove)) {
316: &delenv($expired_key);
317: }
318: }
319:
320: # ---------------------------------------------------------- Append Environment
321:
322: sub appenv {
323: my %newenv=@_;
324: foreach my $key (keys(%newenv)) {
325: if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
326: &logthis("<font color=\"blue\">WARNING: ".
327: "Attempt to modify environment ".$key." to ".$newenv{$key}
328: .'</font>');
329: delete($newenv{$key});
330: } else {
331: $env{$key}=$newenv{$key};
332: }
333: }
334:
335: my $lockfh;
336: unless (open($lockfh,"$env{'user.environment'}")) {
337: return 'error: '.$!;
338: }
339: unless (flock($lockfh,LOCK_EX)) {
340: &logthis("<font color=\"blue\">WARNING: ".
341: 'Could not obtain exclusive lock in appenv: '.$!);
342: close($lockfh);
343: return 'error: '.$!;
344: }
345:
346: my @oldenv;
347: {
348: my $fh;
349: unless (open($fh,"$env{'user.environment'}")) {
350: return 'error: '.$!;
351: }
352: @oldenv=<$fh>;
353: close($fh);
354: }
355: for (my $i=0; $i<=$#oldenv; $i++) {
356: chomp($oldenv[$i]);
357: if ($oldenv[$i] ne '') {
358: my ($name,$value)=split(/=/,$oldenv[$i],2);
359: $name=&unescape($name);
360: $value=&unescape($value);
361: unless (defined($newenv{$name})) {
362: $newenv{$name}=$value;
363: }
364: }
365: }
366: {
367: my $fh;
368: unless (open($fh,">$env{'user.environment'}")) {
369: return 'error';
370: }
371: my $newname;
372: foreach $newname (keys %newenv) {
373: print $fh &escape($newname).'='.&escape($newenv{$newname})."\n";
374: }
375: close($fh);
376: }
377:
378: close($lockfh);
379: return 'ok';
380: }
381: # ----------------------------------------------------- Delete from Environment
382:
383: sub delenv {
384: my $delthis=shift;
385: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
386: &logthis("<font color=\"blue\">WARNING: ".
387: "Attempt to delete from environment ".$delthis);
388: return 'error';
389: }
390: my @oldenv;
391: {
392: my $fh;
393: unless (open($fh,"$env{'user.environment'}")) {
394: return 'error';
395: }
396: unless (flock($fh,LOCK_SH)) {
397: &logthis("<font color=\"blue\">WARNING: ".
398: 'Could not obtain shared lock in delenv: '.$!);
399: close($fh);
400: return 'error: '.$!;
401: }
402: @oldenv=<$fh>;
403: close($fh);
404: }
405: {
406: my $fh;
407: unless (open($fh,">$env{'user.environment'}")) {
408: return 'error';
409: }
410: unless (flock($fh,LOCK_EX)) {
411: &logthis("<font color=\"blue\">WARNING: ".
412: 'Could not obtain exclusive lock in delenv: '.$!);
413: close($fh);
414: return 'error: '.$!;
415: }
416: foreach my $cur_key (@oldenv) {
417: my $unescaped_cur_key = &unescape($cur_key);
418: if ($unescaped_cur_key=~/^$delthis/) {
419: my ($key) = split('=',$cur_key,2);
420: $key = &unescape($key);
421: delete($env{$key});
422: } else {
423: print $fh $cur_key;
424: }
425: }
426: close($fh);
427: }
428: return 'ok';
429: }
430:
431: # ------------------------------------------ Find out current server userload
432: # there is a copy in lond
433: sub userload {
434: my $numusers=0;
435: {
436: opendir(LONIDS,$perlvar{'lonIDsDir'});
437: my $filename;
438: my $curtime=time;
439: while ($filename=readdir(LONIDS)) {
440: if ($filename eq '.' || $filename eq '..') {next;}
441: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
442: if ($curtime-$mtime < 1800) { $numusers++; }
443: }
444: closedir(LONIDS);
445: }
446: my $userloadpercent=0;
447: my $maxuserload=$perlvar{'lonUserLoadLim'};
448: if ($maxuserload) {
449: $userloadpercent=100*$numusers/$maxuserload;
450: }
451: $userloadpercent=sprintf("%.2f",$userloadpercent);
452: return $userloadpercent;
453: }
454:
455: # ------------------------------------------ Fight off request when overloaded
456:
457: sub overloaderror {
458: my ($r,$checkserver)=@_;
459: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
460: my $loadavg;
461: if ($checkserver eq $perlvar{'lonHostID'}) {
462: open(my $loadfile,'/proc/loadavg');
463: $loadavg=<$loadfile>;
464: $loadavg =~ s/\s.*//g;
465: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
466: close($loadfile);
467: } else {
468: $loadavg=&reply('load',$checkserver);
469: }
470: my $overload=$loadavg-100;
471: if ($overload>0) {
472: $r->err_headers_out->{'Retry-After'}=$overload;
473: $r->log_error('Overload of '.$overload.' on '.$checkserver);
474: return 413;
475: }
476: return '';
477: }
478:
479: # ------------------------------ Find server with least workload from spare.tab
480:
481: sub spareserver {
482: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
483: my $tryserver;
484: my $spareserver='';
485: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
486: my $lowestserver=$loadpercent > $userloadpercent?
487: $loadpercent : $userloadpercent;
488: foreach $tryserver (keys(%spareid)) {
489: my $loadans=&reply('load',$tryserver);
490: my $userloadans=&reply('userload',$tryserver);
491: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
492: next; #didn't get a number from the server
493: }
494: my $answer;
495: if ($loadans =~ /\d/) {
496: if ($userloadans =~ /\d/) {
497: #both are numbers, pick the bigger one
498: $answer=$loadans > $userloadans?
499: $loadans : $userloadans;
500: } else {
501: $answer = $loadans;
502: }
503: } else {
504: $answer = $userloadans;
505: }
506: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
507: if ($want_server_name) {
508: $spareserver=$tryserver;
509: } else {
510: $spareserver="http://$hostname{$tryserver}";
511: }
512: $lowestserver=$answer;
513: }
514: }
515: return $spareserver;
516: }
517:
518: # --------------------------------------------- Try to change a user's password
519:
520: sub changepass {
521: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
522: $currentpass = &escape($currentpass);
523: $newpass = &escape($newpass);
524: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
525: $server);
526: if (! $answer) {
527: &logthis("No reply on password change request to $server ".
528: "by $uname in domain $udom.");
529: } elsif ($answer =~ "^ok") {
530: &logthis("$uname in $udom successfully changed their password ".
531: "on $server.");
532: } elsif ($answer =~ "^pwchange_failure") {
533: &logthis("$uname in $udom was unable to change their password ".
534: "on $server. The action was blocked by either lcpasswd ".
535: "or pwchange");
536: } elsif ($answer =~ "^non_authorized") {
537: &logthis("$uname in $udom did not get their password correct when ".
538: "attempting to change it on $server.");
539: } elsif ($answer =~ "^auth_mode_error") {
540: &logthis("$uname in $udom attempted to change their password despite ".
541: "not being locally or internally authenticated on $server.");
542: } elsif ($answer =~ "^unknown_user") {
543: &logthis("$uname in $udom attempted to change their password ".
544: "on $server but were unable to because $server is not ".
545: "their home server.");
546: } elsif ($answer =~ "^refused") {
547: &logthis("$server refused to change $uname in $udom password because ".
548: "it was sent an unencrypted request to change the password.");
549: }
550: return $answer;
551: }
552:
553: # ----------------------- Try to determine user's current authentication scheme
554:
555: sub queryauthenticate {
556: my ($uname,$udom)=@_;
557: my $uhome=&homeserver($uname,$udom);
558: if (!$uhome) {
559: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
560: return 'no_host';
561: }
562: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
563: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
564: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
565: }
566: return $answer;
567: }
568:
569: # --------- Try to authenticate user from domain's lib servers (first this one)
570:
571: sub authenticate {
572: my ($uname,$upass,$udom)=@_;
573: $upass=escape($upass);
574: $uname=~s/\W//g;
575: my $uhome=&homeserver($uname,$udom);
576: if (!$uhome) {
577: &logthis("User $uname at $udom is unknown in authenticate");
578: return 'no_host';
579: }
580: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
581: if ($answer eq 'authorized') {
582: &logthis("User $uname at $udom authorized by $uhome");
583: return $uhome;
584: }
585: if ($answer eq 'non_authorized') {
586: &logthis("User $uname at $udom rejected by $uhome");
587: return 'no_host';
588: }
589: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
590: return 'no_host';
591: }
592:
593: # ---------------------- Find the homebase for a user from domain's lib servers
594:
595: my %homecache;
596: sub homeserver {
597: my ($uname,$udom,$ignoreBadCache)=@_;
598: my $index="$uname:$udom";
599:
600: if (exists($homecache{$index})) { return $homecache{$index}; }
601: my $tryserver;
602: foreach $tryserver (keys %libserv) {
603: next if ($ignoreBadCache ne 'true' &&
604: exists($badServerCache{$tryserver}));
605: if ($hostdom{$tryserver} eq $udom) {
606: my $answer=reply("home:$udom:$uname",$tryserver);
607: if ($answer eq 'found') {
608: return $homecache{$index}=$tryserver;
609: } elsif ($answer eq 'no_host') {
610: $badServerCache{$tryserver}=1;
611: }
612: }
613: }
614: return 'no_host';
615: }
616:
617: # ------------------------------------- Find the usernames behind a list of IDs
618:
619: sub idget {
620: my ($udom,@ids)=@_;
621: my %returnhash=();
622:
623: my $tryserver;
624: foreach $tryserver (keys %libserv) {
625: if ($hostdom{$tryserver} eq $udom) {
626: my $idlist=join('&',@ids);
627: $idlist=~tr/A-Z/a-z/;
628: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
629: my @answer=();
630: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
631: @answer=split(/\&/,$reply);
632: } ;
633: my $i;
634: for ($i=0;$i<=$#ids;$i++) {
635: if ($answer[$i]) {
636: $returnhash{$ids[$i]}=$answer[$i];
637: }
638: }
639: }
640: }
641: return %returnhash;
642: }
643:
644: # ------------------------------------- Find the IDs behind a list of usernames
645:
646: sub idrget {
647: my ($udom,@unames)=@_;
648: my %returnhash=();
649: foreach (@unames) {
650: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
651: }
652: return %returnhash;
653: }
654:
655: # ------------------------------- Store away a list of names and associated IDs
656:
657: sub idput {
658: my ($udom,%ids)=@_;
659: my %servers=();
660: foreach (keys %ids) {
661: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
662: my $uhom=&homeserver($_,$udom);
663: if ($uhom ne 'no_host') {
664: my $id=&escape($ids{$_});
665: $id=~tr/A-Z/a-z/;
666: my $unam=&escape($_);
667: if ($servers{$uhom}) {
668: $servers{$uhom}.='&'.$id.'='.$unam;
669: } else {
670: $servers{$uhom}=$id.'='.$unam;
671: }
672: }
673: }
674: foreach (keys %servers) {
675: &critical('idput:'.$udom.':'.$servers{$_},$_);
676: }
677: }
678:
679: # --------------------------------------------------- Assign a key to a student
680:
681: sub assign_access_key {
682: #
683: # a valid key looks like uname:udom#comments
684: # comments are being appended
685: #
686: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
687: $kdom=
688: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
689: $knum=
690: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
691: $cdom=
692: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
693: $cnum=
694: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
695: $udom=$env{'user.name'} unless (defined($udom));
696: $uname=$env{'user.domain'} unless (defined($uname));
697: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
698: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
699: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
700: # assigned to this person
701: # - this should not happen,
702: # unless something went wrong
703: # the first time around
704: # ready to assign
705: $logentry=$1.'; '.$logentry;
706: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
707: $kdom,$knum) eq 'ok') {
708: # key now belongs to user
709: my $envkey='key.'.$cdom.'_'.$cnum;
710: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
711: &appenv('environment.'.$envkey => $ckey);
712: return 'ok';
713: } else {
714: return
715: 'error: Count not permanently assign key, will need to be re-entered later.';
716: }
717: } else {
718: return 'error: Could not assign key, try again later.';
719: }
720: } elsif (!$existing{$ckey}) {
721: # the key does not exist
722: return 'error: The key does not exist';
723: } else {
724: # the key is somebody else's
725: return 'error: The key is already in use';
726: }
727: }
728:
729: # ------------------------------------------ put an additional comment on a key
730:
731: sub comment_access_key {
732: #
733: # a valid key looks like uname:udom#comments
734: # comments are being appended
735: #
736: my ($ckey,$cdom,$cnum,$logentry)=@_;
737: $cdom=
738: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
739: $cnum=
740: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
741: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
742: if ($existing{$ckey}) {
743: $existing{$ckey}.='; '.$logentry;
744: # ready to assign
745: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
746: $cdom,$cnum) eq 'ok') {
747: return 'ok';
748: } else {
749: return 'error: Count not store comment.';
750: }
751: } else {
752: # the key does not exist
753: return 'error: The key does not exist';
754: }
755: }
756:
757: # ------------------------------------------------------ Generate a set of keys
758:
759: sub generate_access_keys {
760: my ($number,$cdom,$cnum,$logentry)=@_;
761: $cdom=
762: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
763: $cnum=
764: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
765: unless (&allowed('mky',$cdom)) { return 0; }
766: unless (($cdom) && ($cnum)) { return 0; }
767: if ($number>10000) { return 0; }
768: sleep(2); # make sure don't get same seed twice
769: srand(time()^($$+($$<<15))); # from "Programming Perl"
770: my $total=0;
771: for (my $i=1;$i<=$number;$i++) {
772: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
773: sprintf("%lx",int(100000*rand)).'-'.
774: sprintf("%lx",int(100000*rand));
775: $newkey=~s/1/g/g; # folks mix up 1 and l
776: $newkey=~s/0/h/g; # and also 0 and O
777: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
778: if ($existing{$newkey}) {
779: $i--;
780: } else {
781: if (&put('accesskeys',
782: { $newkey => '# generated '.localtime().
783: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
784: '; '.$logentry },
785: $cdom,$cnum) eq 'ok') {
786: $total++;
787: }
788: }
789: }
790: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
791: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
792: return $total;
793: }
794:
795: # ------------------------------------------------------- Validate an accesskey
796:
797: sub validate_access_key {
798: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
799: $cdom=
800: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
801: $cnum=
802: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
803: $udom=$env{'user.domain'} unless (defined($udom));
804: $uname=$env{'user.name'} unless (defined($uname));
805: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
806: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
807: }
808:
809: # ------------------------------------- Find the section of student in a course
810: sub devalidate_getsection_cache {
811: my ($udom,$unam,$courseid)=@_;
812: $courseid=~s/\_/\//g;
813: $courseid=~s/^(\w)/\/$1/;
814: my $hashid="$udom:$unam:$courseid";
815: &devalidate_cache_new('getsection',$hashid);
816: }
817:
818: sub getsection {
819: my ($udom,$unam,$courseid)=@_;
820: my $cachetime=1800;
821: $courseid=~s/\_/\//g;
822: $courseid=~s/^(\w)/\/$1/;
823:
824: my $hashid="$udom:$unam:$courseid";
825: my ($result,$cached)=&is_cached_new('getsection',$hashid);
826: if (defined($cached)) { return $result; }
827:
828: my %Pending;
829: my %Expired;
830: #
831: # Each role can either have not started yet (pending), be active,
832: # or have expired.
833: #
834: # If there is an active role, we are done.
835: #
836: # If there is more than one role which has not started yet,
837: # choose the one which will start sooner
838: # If there is one role which has not started yet, return it.
839: #
840: # If there is more than one expired role, choose the one which ended last.
841: # If there is a role which has expired, return it.
842: #
843: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
844: &homeserver($unam,$udom)))) {
845: my ($key,$value)=split(/\=/,$_);
846: $key=&unescape($key);
847: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
848: my $section=$1;
849: if ($key eq $courseid.'_st') { $section=''; }
850: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
851: my $now=time;
852: if (defined($end) && $end && ($now > $end)) {
853: $Expired{$end}=$section;
854: next;
855: }
856: if (defined($start) && $start && ($now < $start)) {
857: $Pending{$start}=$section;
858: next;
859: }
860: return &do_cache_new('getsection',$hashid,$section,$cachetime);
861: }
862: #
863: # Presumedly there will be few matching roles from the above
864: # loop and the sorting time will be negligible.
865: if (scalar(keys(%Pending))) {
866: my ($time) = sort {$a <=> $b} keys(%Pending);
867: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
868: }
869: if (scalar(keys(%Expired))) {
870: my @sorted = sort {$a <=> $b} keys(%Expired);
871: my $time = pop(@sorted);
872: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
873: }
874: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
875: }
876:
877: sub save_cache {
878: &purge_remembered();
879: #&Apache::loncommon::validate_page();
880: undef(%env);
881: }
882:
883: my $to_remember=-1;
884: my %remembered;
885: my %accessed;
886: my $kicks=0;
887: my $hits=0;
888: sub devalidate_cache_new {
889: my ($name,$id,$debug) = @_;
890: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
891: $id=&escape($name.':'.$id);
892: $memcache->delete($id);
893: delete($remembered{$id});
894: delete($accessed{$id});
895: }
896:
897: sub is_cached_new {
898: my ($name,$id,$debug) = @_;
899: $id=&escape($name.':'.$id);
900: if (exists($remembered{$id})) {
901: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
902: $accessed{$id}=[&gettimeofday()];
903: $hits++;
904: return ($remembered{$id},1);
905: }
906: my $value = $memcache->get($id);
907: if (!(defined($value))) {
908: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
909: return (undef,undef);
910: }
911: if ($value eq '__undef__') {
912: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
913: $value=undef;
914: }
915: &make_room($id,$value,$debug);
916: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
917: return ($value,1);
918: }
919:
920: sub do_cache_new {
921: my ($name,$id,$value,$time,$debug) = @_;
922: $id=&escape($name.':'.$id);
923: my $setvalue=$value;
924: if (!defined($setvalue)) {
925: $setvalue='__undef__';
926: }
927: if (!defined($time) ) {
928: $time=600;
929: }
930: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
931: $memcache->set($id,$setvalue,$time);
932: # need to make a copy of $value
933: #&make_room($id,$value,$debug);
934: return $value;
935: }
936:
937: sub make_room {
938: my ($id,$value,$debug)=@_;
939: $remembered{$id}=$value;
940: if ($to_remember<0) { return; }
941: $accessed{$id}=[&gettimeofday()];
942: if (scalar(keys(%remembered)) <= $to_remember) { return; }
943: my $to_kick;
944: my $max_time=0;
945: foreach my $other (keys(%accessed)) {
946: if (&tv_interval($accessed{$other}) > $max_time) {
947: $to_kick=$other;
948: $max_time=&tv_interval($accessed{$other});
949: }
950: }
951: delete($remembered{$to_kick});
952: delete($accessed{$to_kick});
953: $kicks++;
954: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
955: return;
956: }
957:
958: sub purge_remembered {
959: #&logthis("Tossing ".scalar(keys(%remembered)));
960: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
961: undef(%remembered);
962: undef(%accessed);
963: }
964: # ------------------------------------- Read an entry from a user's environment
965:
966: sub userenvironment {
967: my ($udom,$unam,@what)=@_;
968: my %returnhash=();
969: my @answer=split(/\&/,
970: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
971: &homeserver($unam,$udom)));
972: my $i;
973: for ($i=0;$i<=$#what;$i++) {
974: $returnhash{$what[$i]}=&unescape($answer[$i]);
975: }
976: return %returnhash;
977: }
978:
979: # ---------------------------------------------------------- Get a studentphoto
980: sub studentphoto {
981: my ($udom,$unam,$ext) = @_;
982: my $home=&Apache::lonnet::homeserver($unam,$udom);
983: if (defined($env{'request.course.id'})) {
984: if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
985: if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
986: return(&retrievestudentphoto($udom,$unam,$ext));
987: } else {
988: my ($result,$perm_reqd)=
989: &Apache::lonnet::auto_photo_permission($unam,$udom);
990: if ($result eq 'ok') {
991: if (!($perm_reqd eq 'yes')) {
992: return(&retrievestudentphoto($udom,$unam,$ext));
993: }
994: }
995: }
996: }
997: } else {
998: my ($result,$perm_reqd) =
999: &Apache::lonnet::auto_photo_permission($unam,$udom);
1000: if ($result eq 'ok') {
1001: if (!($perm_reqd eq 'yes')) {
1002: return(&retrievestudentphoto($udom,$unam,$ext));
1003: }
1004: }
1005: }
1006: return '/adm/lonKaputt/lonlogo_broken.gif';
1007: }
1008:
1009: sub retrievestudentphoto {
1010: my ($udom,$unam,$ext,$type) = @_;
1011: my $home=&Apache::lonnet::homeserver($unam,$udom);
1012: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
1013: if ($ret eq 'ok') {
1014: my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
1015: if ($type eq 'thumbnail') {
1016: $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
1017: }
1018: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
1019: return $tokenurl;
1020: } else {
1021: if ($type eq 'thumbnail') {
1022: return '/adm/lonKaputt/genericstudent_tn.gif';
1023: } else {
1024: return '/adm/lonKaputt/lonlogo_broken.gif';
1025: }
1026: }
1027: }
1028:
1029: # -------------------------------------------------------------------- New chat
1030:
1031: sub chatsend {
1032: my ($newentry,$anon,$group)=@_;
1033: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1034: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1035: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1036: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1037: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
1038: &escape($newentry)).':'.$group,$chome);
1039: }
1040:
1041: # ------------------------------------------ Find current version of a resource
1042:
1043: sub getversion {
1044: my $fname=&clutter(shift);
1045: unless ($fname=~/^\/res\//) { return -1; }
1046: return ¤tversion(&filelocation('',$fname));
1047: }
1048:
1049: sub currentversion {
1050: my $fname=shift;
1051: my ($result,$cached)=&is_cached_new('resversion',$fname);
1052: if (defined($cached)) { return $result; }
1053: my $author=$fname;
1054: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1055: my ($udom,$uname)=split(/\//,$author);
1056: my $home=homeserver($uname,$udom);
1057: if ($home eq 'no_host') {
1058: return -1;
1059: }
1060: my $answer=reply("currentversion:$fname",$home);
1061: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1062: return -1;
1063: }
1064: return &do_cache_new('resversion',$fname,$answer,600);
1065: }
1066:
1067: # ----------------------------- Subscribe to a resource, return URL if possible
1068:
1069: sub subscribe {
1070: my $fname=shift;
1071: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1072: $fname=~s/[\n\r]//g;
1073: my $author=$fname;
1074: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1075: my ($udom,$uname)=split(/\//,$author);
1076: my $home=homeserver($uname,$udom);
1077: if ($home eq 'no_host') {
1078: return 'not_found';
1079: }
1080: my $answer=reply("sub:$fname",$home);
1081: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1082: $answer.=' by '.$home;
1083: }
1084: return $answer;
1085: }
1086:
1087: # -------------------------------------------------------------- Replicate file
1088:
1089: sub repcopy {
1090: my $filename=shift;
1091: $filename=~s/\/+/\//g;
1092: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1093: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1094: if ($filename=~m|^/home/httpd/html/userfiles/| or
1095: $filename=~m -^/*(uploaded|editupload)/-) {
1096: return &repcopy_userfile($filename);
1097: }
1098: $filename=~s/[\n\r]//g;
1099: my $transname="$filename.in.transfer";
1100: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1101: my $remoteurl=subscribe($filename);
1102: if ($remoteurl =~ /^con_lost by/) {
1103: &logthis("Subscribe returned $remoteurl: $filename");
1104: return 'unavailable';
1105: } elsif ($remoteurl eq 'not_found') {
1106: #&logthis("Subscribe returned not_found: $filename");
1107: return 'not_found';
1108: } elsif ($remoteurl =~ /^rejected by/) {
1109: &logthis("Subscribe returned $remoteurl: $filename");
1110: return 'forbidden';
1111: } elsif ($remoteurl eq 'directory') {
1112: return 'ok';
1113: } else {
1114: my $author=$filename;
1115: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1116: my ($udom,$uname)=split(/\//,$author);
1117: my $home=homeserver($uname,$udom);
1118: unless ($home eq $perlvar{'lonHostID'}) {
1119: my @parts=split(/\//,$filename);
1120: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1121: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1122: &logthis("Malconfiguration for replication: $filename");
1123: return 'bad_request';
1124: }
1125: my $count;
1126: for ($count=5;$count<$#parts;$count++) {
1127: $path.="/$parts[$count]";
1128: if ((-e $path)!=1) {
1129: mkdir($path,0777);
1130: }
1131: }
1132: my $ua=new LWP::UserAgent;
1133: my $request=new HTTP::Request('GET',"$remoteurl");
1134: my $response=$ua->request($request,$transname);
1135: if ($response->is_error()) {
1136: unlink($transname);
1137: my $message=$response->status_line;
1138: &logthis("<font color=\"blue\">WARNING:"
1139: ." LWP get: $message: $filename</font>");
1140: return 'unavailable';
1141: } else {
1142: if ($remoteurl!~/\.meta$/) {
1143: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1144: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1145: if ($mresponse->is_error()) {
1146: unlink($filename.'.meta');
1147: &logthis(
1148: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1149: }
1150: }
1151: rename($transname,$filename);
1152: return 'ok';
1153: }
1154: }
1155: }
1156: }
1157:
1158: # ------------------------------------------------ Get server side include body
1159: sub ssi_body {
1160: my ($filelink,%form)=@_;
1161: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1162: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1163: }
1164: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1165: &ssi($filelink,%form));
1166: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs;
1167: $output=~s/^.*?\<body[^\>]*\>//si;
1168: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1169: return $output;
1170: }
1171:
1172: # --------------------------------------------------------- Server Side Include
1173:
1174: sub ssi {
1175:
1176: my ($fn,%form)=@_;
1177:
1178: my $ua=new LWP::UserAgent;
1179:
1180: my $request;
1181:
1182: $form{'no_update_last_known'}=1;
1183:
1184: if (%form) {
1185: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1186: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1187: } else {
1188: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1189: }
1190:
1191: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1192: my $response=$ua->request($request);
1193:
1194: return $response->content;
1195: }
1196:
1197: sub externalssi {
1198: my ($url)=@_;
1199: my $ua=new LWP::UserAgent;
1200: my $request=new HTTP::Request('GET',$url);
1201: my $response=$ua->request($request);
1202: return $response->content;
1203: }
1204:
1205: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1206:
1207: sub allowuploaded {
1208: my ($srcurl,$url)=@_;
1209: $url=&clutter(&declutter($url));
1210: my $dir=$url;
1211: $dir=~s/\/[^\/]+$//;
1212: my %httpref=();
1213: my $httpurl=&hreflocation('',$url);
1214: $httpref{'httpref.'.$httpurl}=$srcurl;
1215: &Apache::lonnet::appenv(%httpref);
1216: }
1217:
1218: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1219: # input: action, courseID, current domain, intended
1220: # path to file, source of file, instruction to parse file for objects,
1221: # ref to hash for embedded objects,
1222: # ref to hash for codebase of java objects.
1223: #
1224: # output: url to file (if action was uploaddoc),
1225: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1226: #
1227: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1228: # course.
1229: #
1230: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1231: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1232: # course's home server.
1233: #
1234: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1235: # be copied from $source (current location) to
1236: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1237: # and will then be copied to
1238: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1239: # course's home server.
1240: #
1241: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1242: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1243: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1244: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1245: # in course's home server.
1246: #
1247:
1248: sub process_coursefile {
1249: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1250: my $fetchresult;
1251: my $home=&homeserver($docuname,$docudom);
1252: if ($action eq 'propagate') {
1253: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1254: $home);
1255: } else {
1256: my $fpath = '';
1257: my $fname = $file;
1258: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1259: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1260: my $filepath = &build_filepath($fpath);
1261: if ($action eq 'copy') {
1262: if ($source eq '') {
1263: $fetchresult = 'no source file';
1264: return $fetchresult;
1265: } else {
1266: my $destination = $filepath.'/'.$fname;
1267: rename($source,$destination);
1268: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1269: $home);
1270: }
1271: } elsif ($action eq 'uploaddoc') {
1272: open(my $fh,'>'.$filepath.'/'.$fname);
1273: print $fh $env{'form.'.$source};
1274: close($fh);
1275: if ($parser eq 'parse') {
1276: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1277: unless ($parse_result eq 'ok') {
1278: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1279: }
1280: }
1281: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1282: $home);
1283: if ($fetchresult eq 'ok') {
1284: return '/uploaded/'.$fpath.'/'.$fname;
1285: } else {
1286: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1287: ' to host '.$home.': '.$fetchresult);
1288: return '/adm/notfound.html';
1289: }
1290: }
1291: }
1292: unless ( $fetchresult eq 'ok') {
1293: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1294: ' to host '.$home.': '.$fetchresult);
1295: }
1296: return $fetchresult;
1297: }
1298:
1299: sub build_filepath {
1300: my ($fpath) = @_;
1301: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1302: unless ($fpath eq '') {
1303: my @parts=split('/',$fpath);
1304: foreach my $part (@parts) {
1305: $filepath.= '/'.$part;
1306: if ((-e $filepath)!=1) {
1307: mkdir($filepath,0777);
1308: }
1309: }
1310: }
1311: return $filepath;
1312: }
1313:
1314: sub store_edited_file {
1315: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1316: my $file = $primary_url;
1317: $file =~ s#^/uploaded/$docudom/$docuname/##;
1318: my $fpath = '';
1319: my $fname = $file;
1320: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1321: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1322: my $filepath = &build_filepath($fpath);
1323: open(my $fh,'>'.$filepath.'/'.$fname);
1324: print $fh $content;
1325: close($fh);
1326: my $home=&homeserver($docuname,$docudom);
1327: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1328: $home);
1329: if ($$fetchresult eq 'ok') {
1330: return '/uploaded/'.$fpath.'/'.$fname;
1331: } else {
1332: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1333: ' to host '.$home.': '.$$fetchresult);
1334: return '/adm/notfound.html';
1335: }
1336: }
1337:
1338: sub clean_filename {
1339: my ($fname)=@_;
1340: # Replace Windows backslashes by forward slashes
1341: $fname=~s/\\/\//g;
1342: # Get rid of everything but the actual filename
1343: $fname=~s/^.*\/([^\/]+)$/$1/;
1344: # Replace spaces by underscores
1345: $fname=~s/\s+/\_/g;
1346: # Replace all other weird characters by nothing
1347: $fname=~s/[^\w\.\-]//g;
1348: # Replace all .\d. sequences with _\d. so they no longer look like version
1349: # numbers
1350: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1351: return $fname;
1352: }
1353:
1354: # --------------- Take an uploaded file and put it into the userfiles directory
1355: # input: $formname - the contents of the file are in $env{"form.$formname"}
1356: # the desired filenam is in $env{"form.$formname.filename"}
1357: # $coursedoc - if true up to the current course
1358: # if false
1359: # $subdir - directory in userfile to store the file into
1360: # $parser, $allfiles, $codebase - unknown
1361: #
1362: # output: url of file in userspace, or error: <message>
1363: # or /adm/notfound.html if failure to upload occurse
1364:
1365:
1366: sub userfileupload {
1367: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,$destudom)=@_;
1368: if (!defined($subdir)) { $subdir='unknown'; }
1369: my $fname=$env{'form.'.$formname.'.filename'};
1370: $fname=&clean_filename($fname);
1371: # See if there is anything left
1372: unless ($fname) { return 'error: no uploaded file'; }
1373: chop($env{'form.'.$formname});
1374: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1375: my $now = time;
1376: my $filepath = 'tmp/helprequests/'.$now;
1377: my @parts=split(/\//,$filepath);
1378: my $fullpath = $perlvar{'lonDaemons'};
1379: for (my $i=0;$i<@parts;$i++) {
1380: $fullpath .= '/'.$parts[$i];
1381: if ((-e $fullpath)!=1) {
1382: mkdir($fullpath,0777);
1383: }
1384: }
1385: open(my $fh,'>'.$fullpath.'/'.$fname);
1386: print $fh $env{'form.'.$formname};
1387: close($fh);
1388: return $fullpath.'/'.$fname;
1389: }
1390:
1391: # Create the directory if not present
1392: $fname="$subdir/$fname";
1393: if ($coursedoc) {
1394: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1395: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1396: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1397: return &finishuserfileupload($docuname,$docudom,
1398: $formname,$fname,$parser,$allfiles,
1399: $codebase);
1400: } else {
1401: $fname=$env{'form.folder'}.'/'.$fname;
1402: return &process_coursefile('uploaddoc',$docuname,$docudom,
1403: $fname,$formname,$parser,
1404: $allfiles,$codebase);
1405: }
1406: } elsif (defined($destuname)) {
1407: my $docuname=$destuname;
1408: my $docudom=$destudom;
1409: return &finishuserfileupload($docuname,$docudom,$formname,
1410: $fname,$parser,$allfiles,$codebase);
1411:
1412: } else {
1413: my $docuname=$env{'user.name'};
1414: my $docudom=$env{'user.domain'};
1415: if (exists($env{'form.group'})) {
1416: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1417: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1418: }
1419: return &finishuserfileupload($docuname,$docudom,$formname,
1420: $fname,$parser,$allfiles,$codebase);
1421: }
1422: }
1423:
1424: sub finishuserfileupload {
1425: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
1426: my $path=$docudom.'/'.$docuname.'/';
1427: my $filepath=$perlvar{'lonDocRoot'};
1428: my ($fnamepath,$file);
1429: $file=$fname;
1430: if ($fname=~m|/|) {
1431: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1432: $path.=$fnamepath.'/';
1433: }
1434: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1435: my $count;
1436: for ($count=4;$count<=$#parts;$count++) {
1437: $filepath.="/$parts[$count]";
1438: if ((-e $filepath)!=1) {
1439: mkdir($filepath,0777);
1440: }
1441: }
1442: # Save the file
1443: {
1444: if (!open(FH,'>'.$filepath.'/'.$file)) {
1445: &logthis('Failed to create '.$filepath.'/'.$file);
1446: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1447: return '/adm/notfound.html';
1448: }
1449: if (!print FH ($env{'form.'.$formname})) {
1450: &logthis('Failed to write to '.$filepath.'/'.$file);
1451: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1452: return '/adm/notfound.html';
1453: }
1454: close(FH);
1455: }
1456: if ($parser eq 'parse') {
1457: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1458: $codebase);
1459: unless ($parse_result eq 'ok') {
1460: &logthis('Failed to parse '.$filepath.$file.
1461: ' for embedded media: '.$parse_result);
1462: }
1463: }
1464: # Notify homeserver to grep it
1465: #
1466: my $docuhome=&homeserver($docuname,$docudom);
1467: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1468: if ($fetchresult eq 'ok') {
1469: #
1470: # Return the URL to it
1471: return '/uploaded/'.$path.$file;
1472: } else {
1473: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1474: ': '.$fetchresult);
1475: return '/adm/notfound.html';
1476: }
1477: }
1478:
1479: sub extract_embedded_items {
1480: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1481: my @state = ();
1482: my %javafiles = (
1483: codebase => '',
1484: code => '',
1485: archive => ''
1486: );
1487: my %mediafiles = (
1488: src => '',
1489: movie => '',
1490: );
1491: my $p;
1492: if ($content) {
1493: $p = HTML::LCParser->new($content);
1494: } else {
1495: $p = HTML::LCParser->new($filepath.'/'.$file);
1496: }
1497: while (my $t=$p->get_token()) {
1498: if ($t->[0] eq 'S') {
1499: my ($tagname, $attr) = ($t->[1],$t->[2]);
1500: push (@state, $tagname);
1501: if (lc($tagname) eq 'allow') {
1502: &add_filetype($allfiles,$attr->{'src'},'src');
1503: }
1504: if (lc($tagname) eq 'img') {
1505: &add_filetype($allfiles,$attr->{'src'},'src');
1506: }
1507: if (lc($tagname) eq 'script') {
1508: if ($attr->{'archive'} =~ /\.jar$/i) {
1509: &add_filetype($allfiles,$attr->{'archive'},'archive');
1510: } else {
1511: &add_filetype($allfiles,$attr->{'src'},'src');
1512: }
1513: }
1514: if (lc($tagname) eq 'link') {
1515: if (lc($attr->{'rel'}) eq 'stylesheet') {
1516: &add_filetype($allfiles,$attr->{'href'},'href');
1517: }
1518: }
1519: if (lc($tagname) eq 'object' ||
1520: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1521: foreach my $item (keys(%javafiles)) {
1522: $javafiles{$item} = '';
1523: }
1524: }
1525: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1526: my $name = lc($attr->{'name'});
1527: foreach my $item (keys(%javafiles)) {
1528: if ($name eq $item) {
1529: $javafiles{$item} = $attr->{'value'};
1530: last;
1531: }
1532: }
1533: foreach my $item (keys(%mediafiles)) {
1534: if ($name eq $item) {
1535: &add_filetype($allfiles, $attr->{'value'}, 'value');
1536: last;
1537: }
1538: }
1539: }
1540: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1541: foreach my $item (keys(%javafiles)) {
1542: if ($attr->{$item}) {
1543: $javafiles{$item} = $attr->{$item};
1544: last;
1545: }
1546: }
1547: foreach my $item (keys(%mediafiles)) {
1548: if ($attr->{$item}) {
1549: &add_filetype($allfiles,$attr->{$item},$item);
1550: last;
1551: }
1552: }
1553: }
1554: } elsif ($t->[0] eq 'E') {
1555: my ($tagname) = ($t->[1]);
1556: if ($javafiles{'codebase'} ne '') {
1557: $javafiles{'codebase'} .= '/';
1558: }
1559: if (lc($tagname) eq 'applet' ||
1560: lc($tagname) eq 'object' ||
1561: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1562: ) {
1563: foreach my $item (keys(%javafiles)) {
1564: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1565: my $file=$javafiles{'codebase'}.$javafiles{$item};
1566: &add_filetype($allfiles,$file,$item);
1567: }
1568: }
1569: }
1570: pop @state;
1571: }
1572: }
1573: return 'ok';
1574: }
1575:
1576: sub add_filetype {
1577: my ($allfiles,$file,$type)=@_;
1578: if (exists($allfiles->{$file})) {
1579: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1580: push(@{$allfiles->{$file}}, &escape($type));
1581: }
1582: } else {
1583: @{$allfiles->{$file}} = (&escape($type));
1584: }
1585: }
1586:
1587: sub removeuploadedurl {
1588: my ($url)=@_;
1589: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1590: return &removeuserfile($uname,$udom,$fname);
1591: }
1592:
1593: sub removeuserfile {
1594: my ($docuname,$docudom,$fname)=@_;
1595: my $home=&homeserver($docuname,$docudom);
1596: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1597: }
1598:
1599: sub mkdiruserfile {
1600: my ($docuname,$docudom,$dir)=@_;
1601: my $home=&homeserver($docuname,$docudom);
1602: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1603: }
1604:
1605: sub renameuserfile {
1606: my ($docuname,$docudom,$old,$new)=@_;
1607: my $home=&homeserver($docuname,$docudom);
1608: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1609: &escape("$new"),$home);
1610: }
1611:
1612: # ------------------------------------------------------------------------- Log
1613:
1614: sub log {
1615: my ($dom,$nam,$hom,$what)=@_;
1616: return critical("log:$dom:$nam:$what",$hom);
1617: }
1618:
1619: # ------------------------------------------------------------------ Course Log
1620: #
1621: # This routine flushes several buffers of non-mission-critical nature
1622: #
1623:
1624: sub flushcourselogs {
1625: &logthis('Flushing log buffers');
1626: #
1627: # course logs
1628: # This is a log of all transactions in a course, which can be used
1629: # for data mining purposes
1630: #
1631: # It also collects the courseid database, which lists last transaction
1632: # times and course titles for all courseids
1633: #
1634: my %courseidbuffer=();
1635: foreach (keys %courselogs) {
1636: my $crsid=$_;
1637: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1638: &escape($courselogs{$crsid}),
1639: $coursehombuf{$crsid}) eq 'ok') {
1640: delete $courselogs{$crsid};
1641: } else {
1642: &logthis('Failed to flush log buffer for '.$crsid);
1643: if (length($courselogs{$crsid})>40000) {
1644: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
1645: " exceeded maximum size, deleting.</font>");
1646: delete $courselogs{$crsid};
1647: }
1648: }
1649: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1650: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1651: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1652: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1653: } else {
1654: $courseidbuffer{$coursehombuf{$crsid}}=
1655: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1656: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1657: }
1658: }
1659: #
1660: # Write course id database (reverse lookup) to homeserver of courses
1661: # Is used in pickcourse
1662: #
1663: foreach (keys %courseidbuffer) {
1664: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1665: }
1666: #
1667: # File accesses
1668: # Writes to the dynamic metadata of resources to get hit counts, etc.
1669: #
1670: foreach my $entry (keys(%accesshash)) {
1671: if ($entry =~ /___count$/) {
1672: my ($dom,$name);
1673: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1674: if (! defined($dom) || $dom eq '' ||
1675: ! defined($name) || $name eq '') {
1676: my $cid = $env{'request.course.id'};
1677: $dom = $env{'request.'.$cid.'.domain'};
1678: $name = $env{'request.'.$cid.'.num'};
1679: }
1680: my $value = $accesshash{$entry};
1681: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1682: my %temphash=($url => $value);
1683: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1684: if ($result eq 'ok') {
1685: delete $accesshash{$entry};
1686: } elsif ($result eq 'unknown_cmd') {
1687: # Target server has old code running on it.
1688: my %temphash=($entry => $value);
1689: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1690: delete $accesshash{$entry};
1691: }
1692: }
1693: } else {
1694: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1695: my %temphash=($entry => $accesshash{$entry});
1696: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1697: delete $accesshash{$entry};
1698: }
1699: }
1700: }
1701: #
1702: # Roles
1703: # Reverse lookup of user roles for course faculty/staff and co-authorship
1704: #
1705: foreach (keys %userrolehash) {
1706: my $entry=$_;
1707: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1708: split(/\:/,$entry);
1709: if (&Apache::lonnet::put('nohist_userroles',
1710: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1711: $rudom,$runame) eq 'ok') {
1712: delete $userrolehash{$entry};
1713: }
1714: }
1715: #
1716: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1717: #
1718: my %domrolebuffer = ();
1719: foreach my $entry (keys %domainrolehash) {
1720: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1721: if ($domrolebuffer{$rudom}) {
1722: $domrolebuffer{$rudom}.='&'.&escape($entry).
1723: '='.&escape($domainrolehash{$entry});
1724: } else {
1725: $domrolebuffer{$rudom}.=&escape($entry).
1726: '='.&escape($domainrolehash{$entry});
1727: }
1728: delete $domainrolehash{$entry};
1729: }
1730: foreach my $dom (keys(%domrolebuffer)) {
1731: foreach my $tryserver (keys %libserv) {
1732: if ($hostdom{$tryserver} eq $dom) {
1733: unless (&reply('domroleput:'.$dom.':'.
1734: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1735: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1736: }
1737: }
1738: }
1739: }
1740: $dumpcount++;
1741: }
1742:
1743: sub courselog {
1744: my $what=shift;
1745: $what=time.':'.$what;
1746: unless ($env{'request.course.id'}) { return ''; }
1747: $coursedombuf{$env{'request.course.id'}}=
1748: $env{'course.'.$env{'request.course.id'}.'.domain'};
1749: $coursenumbuf{$env{'request.course.id'}}=
1750: $env{'course.'.$env{'request.course.id'}.'.num'};
1751: $coursehombuf{$env{'request.course.id'}}=
1752: $env{'course.'.$env{'request.course.id'}.'.home'};
1753: $coursedescrbuf{$env{'request.course.id'}}=
1754: $env{'course.'.$env{'request.course.id'}.'.description'};
1755: $courseinstcodebuf{$env{'request.course.id'}}=
1756: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1757: $courseownerbuf{$env{'request.course.id'}}=
1758: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1759: if (defined $courselogs{$env{'request.course.id'}}) {
1760: $courselogs{$env{'request.course.id'}}.='&'.$what;
1761: } else {
1762: $courselogs{$env{'request.course.id'}}.=$what;
1763: }
1764: if (length($courselogs{$env{'request.course.id'}})>4048) {
1765: &flushcourselogs();
1766: }
1767: }
1768:
1769: sub courseacclog {
1770: my $fnsymb=shift;
1771: unless ($env{'request.course.id'}) { return ''; }
1772: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1773: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1774: $what.=':POST';
1775: # FIXME: Probably ought to escape things....
1776: foreach (keys %env) {
1777: if ($_=~/^form\.(.*)/) {
1778: $what.=':'.$1.'='.$env{$_};
1779: }
1780: }
1781: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1782: # FIXME: We should not be depending on a form parameter that someone
1783: # editing lonsearchcat.pm might change in the future.
1784: if ($env{'form.phase'} eq 'course_search') {
1785: $what.= ':POST';
1786: # FIXME: Probably ought to escape things....
1787: foreach my $element ('courseexp','crsfulltext','crsrelated',
1788: 'crsdiscuss') {
1789: $what.=':'.$element.'='.$env{'form.'.$element};
1790: }
1791: }
1792: }
1793: &courselog($what);
1794: }
1795:
1796: sub countacc {
1797: my $url=&declutter(shift);
1798: return if (! defined($url) || $url eq '');
1799: unless ($env{'request.course.id'}) { return ''; }
1800: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1801: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1802: $accesshash{$key}++;
1803: }
1804:
1805: sub linklog {
1806: my ($from,$to)=@_;
1807: $from=&declutter($from);
1808: $to=&declutter($to);
1809: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1810: $accesshash{$to.'___'.$from.'___goto'}=1;
1811: }
1812:
1813: sub userrolelog {
1814: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1815: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
1816: ($trole=~/^in/) || ($trole=~/^cc/) ||
1817: ($trole=~/^ep/) || ($trole=~/^cr/) ||
1818: ($trole=~/^ta/)) {
1819: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1820: $userrolehash
1821: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1822: =$tend.':'.$tstart;
1823: }
1824: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
1825: ($trole=~/^li/) || ($trole=~/^li/) ||
1826: ($trole=~/^au/) || ($trole=~/^dg/) ||
1827: ($trole=~/^sc/)) {
1828: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1829: $domainrolehash
1830: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1831: = $tend.':'.$tstart;
1832: }
1833: }
1834:
1835: sub get_course_adv_roles {
1836: my $cid=shift;
1837: $cid=$env{'request.course.id'} unless (defined($cid));
1838: my %coursehash=&coursedescription($cid);
1839: my %nothide=();
1840: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1841: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1842: }
1843: my %returnhash=();
1844: my %dumphash=
1845: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1846: my $now=time;
1847: foreach (keys %dumphash) {
1848: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1849: if (($tstart) && ($tstart<0)) { next; }
1850: if (($tend) && ($tend<$now)) { next; }
1851: if (($tstart) && ($now<$tstart)) { next; }
1852: my ($role,$username,$domain,$section)=split(/\:/,$_);
1853: if ($username eq '' || $domain eq '') { next; }
1854: if ((&privileged($username,$domain)) &&
1855: (!$nothide{$username.':'.$domain})) { next; }
1856: if ($role eq 'cr') { next; }
1857: my $key=&plaintext($role);
1858: if ($role =~ /^cr/) {
1859: $key=(split('/',$role))[3];
1860: }
1861: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1862: if ($returnhash{$key}) {
1863: $returnhash{$key}.=','.$username.':'.$domain;
1864: } else {
1865: $returnhash{$key}=$username.':'.$domain;
1866: }
1867: }
1868: return %returnhash;
1869: }
1870:
1871: sub get_my_roles {
1872: my ($uname,$udom)=@_;
1873: unless (defined($uname)) { $uname=$env{'user.name'}; }
1874: unless (defined($udom)) { $udom=$env{'user.domain'}; }
1875: my %dumphash=
1876: &dump('nohist_userroles',$udom,$uname);
1877: my %returnhash=();
1878: my $now=time;
1879: foreach (keys %dumphash) {
1880: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1881: if (($tstart) && ($tstart<0)) { next; }
1882: if (($tend) && ($tend<$now)) { next; }
1883: if (($tstart) && ($now<$tstart)) { next; }
1884: my ($role,$username,$domain,$section)=split(/\:/,$_);
1885: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1886: }
1887: return %returnhash;
1888: }
1889:
1890: # ----------------------------------------------------- Frontpage Announcements
1891: #
1892: #
1893:
1894: sub postannounce {
1895: my ($server,$text)=@_;
1896: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1897: unless ($text=~/\w/) { $text=''; }
1898: return &reply('setannounce:'.&escape($text),$server);
1899: }
1900:
1901: sub getannounce {
1902:
1903: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1904: my $announcement='';
1905: while (<$fh>) { $announcement .=$_; }
1906: close($fh);
1907: if ($announcement=~/\w/) {
1908: return
1909: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1910: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1911: } else {
1912: return '';
1913: }
1914: } else {
1915: return '';
1916: }
1917: }
1918:
1919: # ---------------------------------------------------------- Course ID routines
1920: # Deal with domain's nohist_courseid.db files
1921: #
1922:
1923: sub courseidput {
1924: my ($domain,$what,$coursehome)=@_;
1925: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1926: }
1927:
1928: sub courseiddump {
1929: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref)=@_;
1930: my %returnhash=();
1931: unless ($domfilter) { $domfilter=''; }
1932: foreach my $tryserver (keys %libserv) {
1933: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1934: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1935: foreach (
1936: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1937: $sincefilter.':'.&escape($descfilter).':'.
1938: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter),
1939: $tryserver))) {
1940: my ($key,$value)=split(/\=/,$_);
1941: if (($key) && ($value)) {
1942: $returnhash{&unescape($key)}=$value;
1943: }
1944: }
1945: }
1946: }
1947: }
1948: return %returnhash;
1949: }
1950:
1951: # ---------------------------------------------------------- DC e-mail
1952:
1953: sub dcmailput {
1954: my ($domain,$msgid,$message,$server)=@_;
1955: my $status = &Apache::lonnet::critical(
1956: 'dcmailput:'.$domain.':'.&Apache::lonnet::escape($msgid).'='.
1957: &Apache::lonnet::escape($message),$server);
1958: return $status;
1959: }
1960:
1961: sub dcmaildump {
1962: my ($dom,$startdate,$enddate,$senders) = @_;
1963: my %returnhash=();
1964: if (exists($domain_primary{$dom})) {
1965: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
1966: &escape($enddate).':';
1967: my @esc_senders=map { &escape($_)} @$senders;
1968: $cmd.=&escape(join('&',@esc_senders));
1969: foreach (split(/\&/,&reply($cmd,$domain_primary{$dom}))) {
1970: my ($key,$value) = split(/\=/,$_);
1971: if (($key) && ($value)) {
1972: $returnhash{&unescape($key)} = &unescape($value);
1973: }
1974: }
1975: }
1976: return %returnhash;
1977: }
1978: # ---------------------------------------------------------- Domain roles
1979:
1980: sub get_domain_roles {
1981: my ($dom,$roles,$startdate,$enddate)=@_;
1982: if (undef($startdate) || $startdate eq '') {
1983: $startdate = '.';
1984: }
1985: if (undef($enddate) || $enddate eq '') {
1986: $enddate = '.';
1987: }
1988: my $rolelist = join(':',@{$roles});
1989: my %personnel = ();
1990: foreach my $tryserver (keys(%libserv)) {
1991: if ($hostdom{$tryserver} eq $dom) {
1992: %{$personnel{$tryserver}}=();
1993: foreach (
1994: split(/\&/,&reply('domrolesdump:'.$dom.':'.
1995: &escape($startdate).':'.&escape($enddate).':'.
1996: &escape($rolelist), $tryserver))) {
1997: my($key,$value) = split(/\=/,$_);
1998: if (($key) && ($value)) {
1999: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
2000: }
2001: }
2002: }
2003: }
2004: return %personnel;
2005: }
2006:
2007: # ----------------------------------------------------------- Check out an item
2008:
2009: sub get_first_access {
2010: my ($type,$argsymb)=@_;
2011: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2012: if ($argsymb) { $symb=$argsymb; }
2013: my ($map,$id,$res)=&decode_symb($symb);
2014: if ($type eq 'map') {
2015: $res=&symbread($map);
2016: } else {
2017: $res=$symb;
2018: }
2019: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
2020: return $times{"$courseid\0$res"};
2021: }
2022:
2023: sub set_first_access {
2024: my ($type)=@_;
2025: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2026: my ($map,$id,$res)=&decode_symb($symb);
2027: if ($type eq 'map') {
2028: $res=&symbread($map);
2029: } else {
2030: $res=$symb;
2031: }
2032: my $firstaccess=&get_first_access($type,$symb);
2033: if (!$firstaccess) {
2034: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
2035: }
2036: return 'already_set';
2037: }
2038:
2039: sub checkout {
2040: my ($symb,$tuname,$tudom,$tcrsid)=@_;
2041: my $now=time;
2042: my $lonhost=$perlvar{'lonHostID'};
2043: my $infostr=&escape(
2044: 'CHECKOUTTOKEN&'.
2045: $tuname.'&'.
2046: $tudom.'&'.
2047: $tcrsid.'&'.
2048: $symb.'&'.
2049: $now.'&'.$ENV{'REMOTE_ADDR'});
2050: my $token=&reply('tmpput:'.$infostr,$lonhost);
2051: if ($token=~/^error\:/) {
2052: &logthis("<font color=\"blue\">WARNING: ".
2053: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
2054: "</font>");
2055: return '';
2056: }
2057:
2058: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
2059: $token=~tr/a-z/A-Z/;
2060:
2061: my %infohash=('resource.0.outtoken' => $token,
2062: 'resource.0.checkouttime' => $now,
2063: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
2064:
2065: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2066: return '';
2067: } else {
2068: &logthis("<font color=\"blue\">WARNING: ".
2069: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
2070: "</font>");
2071: }
2072:
2073: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2074: &escape('Checkout '.$infostr.' - '.
2075: $token)) ne 'ok') {
2076: return '';
2077: } else {
2078: &logthis("<font color=\"blue\">WARNING: ".
2079: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
2080: "</font>");
2081: }
2082: return $token;
2083: }
2084:
2085: # ------------------------------------------------------------ Check in an item
2086:
2087: sub checkin {
2088: my $token=shift;
2089: my $now=time;
2090: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2091: $lonhost=~tr/A-Z/a-z/;
2092: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
2093: $dtoken=~s/\W/\_/g;
2094: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2095: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2096:
2097: unless (($tuname) && ($tudom)) {
2098: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2099: return '';
2100: }
2101:
2102: unless (&allowed('mgr',$tcrsid)) {
2103: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2104: $env{'user.name'}.' - '.$env{'user.domain'});
2105: return '';
2106: }
2107:
2108: my %infohash=('resource.0.intoken' => $token,
2109: 'resource.0.checkintime' => $now,
2110: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2111:
2112: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2113: return '';
2114: }
2115:
2116: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2117: &escape('Checkin - '.$token)) ne 'ok') {
2118: return '';
2119: }
2120:
2121: return ($symb,$tuname,$tudom,$tcrsid);
2122: }
2123:
2124: # --------------------------------------------- Set Expire Date for Spreadsheet
2125:
2126: sub expirespread {
2127: my ($uname,$udom,$stype,$usymb)=@_;
2128: my $cid=$env{'request.course.id'};
2129: if ($cid) {
2130: my $now=time;
2131: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2132: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2133: $env{'course.'.$cid.'.num'}.
2134: ':nohist_expirationdates:'.
2135: &escape($key).'='.$now,
2136: $env{'course.'.$cid.'.home'})
2137: }
2138: return 'ok';
2139: }
2140:
2141: # ----------------------------------------------------- Devalidate Spreadsheets
2142:
2143: sub devalidate {
2144: my ($symb,$uname,$udom)=@_;
2145: my $cid=$env{'request.course.id'};
2146: if ($cid) {
2147: # delete the stored spreadsheets for
2148: # - the student level sheet of this user in course's homespace
2149: # - the assessment level sheet for this resource
2150: # for this user in user's homespace
2151: # - current conditional state info
2152: my $key=$uname.':'.$udom.':';
2153: my $status=
2154: &del('nohist_calculatedsheets',
2155: [$key.'studentcalc:'],
2156: $env{'course.'.$cid.'.domain'},
2157: $env{'course.'.$cid.'.num'})
2158: .' '.
2159: &del('nohist_calculatedsheets_'.$cid,
2160: [$key.'assesscalc:'.$symb],$udom,$uname);
2161: unless ($status eq 'ok ok') {
2162: &logthis('Could not devalidate spreadsheet '.
2163: $uname.' at '.$udom.' for '.
2164: $symb.': '.$status);
2165: }
2166: &delenv('user.state.'.$cid);
2167: }
2168: }
2169:
2170: sub get_scalar {
2171: my ($string,$end) = @_;
2172: my $value;
2173: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2174: $value = $1;
2175: } elsif ($$string =~ s/^([^&]*?)&//) {
2176: $value = $1;
2177: }
2178: return &unescape($value);
2179: }
2180:
2181: sub array2str {
2182: my (@array) = @_;
2183: my $result=&arrayref2str(\@array);
2184: $result=~s/^__ARRAY_REF__//;
2185: $result=~s/__END_ARRAY_REF__$//;
2186: return $result;
2187: }
2188:
2189: sub arrayref2str {
2190: my ($arrayref) = @_;
2191: my $result='__ARRAY_REF__';
2192: foreach my $elem (@$arrayref) {
2193: if(ref($elem) eq 'ARRAY') {
2194: $result.=&arrayref2str($elem).'&';
2195: } elsif(ref($elem) eq 'HASH') {
2196: $result.=&hashref2str($elem).'&';
2197: } elsif(ref($elem)) {
2198: #print("Got a ref of ".(ref($elem))." skipping.");
2199: } else {
2200: $result.=&escape($elem).'&';
2201: }
2202: }
2203: $result=~s/\&$//;
2204: $result .= '__END_ARRAY_REF__';
2205: return $result;
2206: }
2207:
2208: sub hash2str {
2209: my (%hash) = @_;
2210: my $result=&hashref2str(\%hash);
2211: $result=~s/^__HASH_REF__//;
2212: $result=~s/__END_HASH_REF__$//;
2213: return $result;
2214: }
2215:
2216: sub hashref2str {
2217: my ($hashref)=@_;
2218: my $result='__HASH_REF__';
2219: foreach (sort(keys(%$hashref))) {
2220: if (ref($_) eq 'ARRAY') {
2221: $result.=&arrayref2str($_).'=';
2222: } elsif (ref($_) eq 'HASH') {
2223: $result.=&hashref2str($_).'=';
2224: } elsif (ref($_)) {
2225: $result.='=';
2226: #print("Got a ref of ".(ref($_))." skipping.");
2227: } else {
2228: if ($_) {$result.=&escape($_).'=';} else { last; }
2229: }
2230:
2231: if(ref($hashref->{$_}) eq 'ARRAY') {
2232: $result.=&arrayref2str($hashref->{$_}).'&';
2233: } elsif(ref($hashref->{$_}) eq 'HASH') {
2234: $result.=&hashref2str($hashref->{$_}).'&';
2235: } elsif(ref($hashref->{$_})) {
2236: $result.='&';
2237: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
2238: } else {
2239: $result.=&escape($hashref->{$_}).'&';
2240: }
2241: }
2242: $result=~s/\&$//;
2243: $result .= '__END_HASH_REF__';
2244: return $result;
2245: }
2246:
2247: sub str2hash {
2248: my ($string)=@_;
2249: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2250: return %$hash;
2251: }
2252:
2253: sub str2hashref {
2254: my ($string) = @_;
2255:
2256: my %hash;
2257:
2258: if($string !~ /^__HASH_REF__/) {
2259: if (! ($string eq '' || !defined($string))) {
2260: $hash{'error'}='Not hash reference';
2261: }
2262: return (\%hash, $string);
2263: }
2264:
2265: $string =~ s/^__HASH_REF__//;
2266:
2267: while($string !~ /^__END_HASH_REF__/) {
2268: #key
2269: my $key='';
2270: if($string =~ /^__HASH_REF__/) {
2271: ($key, $string)=&str2hashref($string);
2272: if(defined($key->{'error'})) {
2273: $hash{'error'}='Bad data';
2274: return (\%hash, $string);
2275: }
2276: } elsif($string =~ /^__ARRAY_REF__/) {
2277: ($key, $string)=&str2arrayref($string);
2278: if($key->[0] eq 'Array reference error') {
2279: $hash{'error'}='Bad data';
2280: return (\%hash, $string);
2281: }
2282: } else {
2283: $string =~ s/^(.*?)=//;
2284: $key=&unescape($1);
2285: }
2286: $string =~ s/^=//;
2287:
2288: #value
2289: my $value='';
2290: if($string =~ /^__HASH_REF__/) {
2291: ($value, $string)=&str2hashref($string);
2292: if(defined($value->{'error'})) {
2293: $hash{'error'}='Bad data';
2294: return (\%hash, $string);
2295: }
2296: } elsif($string =~ /^__ARRAY_REF__/) {
2297: ($value, $string)=&str2arrayref($string);
2298: if($value->[0] eq 'Array reference error') {
2299: $hash{'error'}='Bad data';
2300: return (\%hash, $string);
2301: }
2302: } else {
2303: $value=&get_scalar(\$string,'__END_HASH_REF__');
2304: }
2305: $string =~ s/^&//;
2306:
2307: $hash{$key}=$value;
2308: }
2309:
2310: $string =~ s/^__END_HASH_REF__//;
2311:
2312: return (\%hash, $string);
2313: }
2314:
2315: sub str2array {
2316: my ($string)=@_;
2317: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2318: return @$array;
2319: }
2320:
2321: sub str2arrayref {
2322: my ($string) = @_;
2323: my @array;
2324:
2325: if($string !~ /^__ARRAY_REF__/) {
2326: if (! ($string eq '' || !defined($string))) {
2327: $array[0]='Array reference error';
2328: }
2329: return (\@array, $string);
2330: }
2331:
2332: $string =~ s/^__ARRAY_REF__//;
2333:
2334: while($string !~ /^__END_ARRAY_REF__/) {
2335: my $value='';
2336: if($string =~ /^__HASH_REF__/) {
2337: ($value, $string)=&str2hashref($string);
2338: if(defined($value->{'error'})) {
2339: $array[0] ='Array reference error';
2340: return (\@array, $string);
2341: }
2342: } elsif($string =~ /^__ARRAY_REF__/) {
2343: ($value, $string)=&str2arrayref($string);
2344: if($value->[0] eq 'Array reference error') {
2345: $array[0] ='Array reference error';
2346: return (\@array, $string);
2347: }
2348: } else {
2349: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2350: }
2351: $string =~ s/^&//;
2352:
2353: push(@array, $value);
2354: }
2355:
2356: $string =~ s/^__END_ARRAY_REF__//;
2357:
2358: return (\@array, $string);
2359: }
2360:
2361: # -------------------------------------------------------------------Temp Store
2362:
2363: sub tmpreset {
2364: my ($symb,$namespace,$domain,$stuname) = @_;
2365: if (!$symb) {
2366: $symb=&symbread();
2367: if (!$symb) { $symb= $env{'request.url'}; }
2368: }
2369: $symb=escape($symb);
2370:
2371: if (!$namespace) { $namespace=$env{'request.state'}; }
2372: $namespace=~s/\//\_/g;
2373: $namespace=~s/\W//g;
2374:
2375: if (!$domain) { $domain=$env{'user.domain'}; }
2376: if (!$stuname) { $stuname=$env{'user.name'}; }
2377: if ($domain eq 'public' && $stuname eq 'public') {
2378: $stuname=$ENV{'REMOTE_ADDR'};
2379: }
2380: my $path=$perlvar{'lonDaemons'}.'/tmp';
2381: my %hash;
2382: if (tie(%hash,'GDBM_File',
2383: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2384: &GDBM_WRCREAT(),0640)) {
2385: foreach my $key (keys %hash) {
2386: if ($key=~ /:$symb/) {
2387: delete($hash{$key});
2388: }
2389: }
2390: }
2391: }
2392:
2393: sub tmpstore {
2394: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2395:
2396: if (!$symb) {
2397: $symb=&symbread();
2398: if (!$symb) { $symb= $env{'request.url'}; }
2399: }
2400: $symb=escape($symb);
2401:
2402: if (!$namespace) {
2403: # I don't think we would ever want to store this for a course.
2404: # it seems this will only be used if we don't have a course.
2405: #$namespace=$env{'request.course.id'};
2406: #if (!$namespace) {
2407: $namespace=$env{'request.state'};
2408: #}
2409: }
2410: $namespace=~s/\//\_/g;
2411: $namespace=~s/\W//g;
2412: if (!$domain) { $domain=$env{'user.domain'}; }
2413: if (!$stuname) { $stuname=$env{'user.name'}; }
2414: if ($domain eq 'public' && $stuname eq 'public') {
2415: $stuname=$ENV{'REMOTE_ADDR'};
2416: }
2417: my $now=time;
2418: my %hash;
2419: my $path=$perlvar{'lonDaemons'}.'/tmp';
2420: if (tie(%hash,'GDBM_File',
2421: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2422: &GDBM_WRCREAT(),0640)) {
2423: $hash{"version:$symb"}++;
2424: my $version=$hash{"version:$symb"};
2425: my $allkeys='';
2426: foreach my $key (keys(%$storehash)) {
2427: $allkeys.=$key.':';
2428: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2429: }
2430: $hash{"$version:$symb:timestamp"}=$now;
2431: $allkeys.='timestamp';
2432: $hash{"$version:keys:$symb"}=$allkeys;
2433: if (untie(%hash)) {
2434: return 'ok';
2435: } else {
2436: return "error:$!";
2437: }
2438: } else {
2439: return "error:$!";
2440: }
2441: }
2442:
2443: # -----------------------------------------------------------------Temp Restore
2444:
2445: sub tmprestore {
2446: my ($symb,$namespace,$domain,$stuname) = @_;
2447:
2448: if (!$symb) {
2449: $symb=&symbread();
2450: if (!$symb) { $symb= $env{'request.url'}; }
2451: }
2452: $symb=escape($symb);
2453:
2454: if (!$namespace) { $namespace=$env{'request.state'}; }
2455:
2456: if (!$domain) { $domain=$env{'user.domain'}; }
2457: if (!$stuname) { $stuname=$env{'user.name'}; }
2458: if ($domain eq 'public' && $stuname eq 'public') {
2459: $stuname=$ENV{'REMOTE_ADDR'};
2460: }
2461: my %returnhash;
2462: $namespace=~s/\//\_/g;
2463: $namespace=~s/\W//g;
2464: my %hash;
2465: my $path=$perlvar{'lonDaemons'}.'/tmp';
2466: if (tie(%hash,'GDBM_File',
2467: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2468: &GDBM_READER(),0640)) {
2469: my $version=$hash{"version:$symb"};
2470: $returnhash{'version'}=$version;
2471: my $scope;
2472: for ($scope=1;$scope<=$version;$scope++) {
2473: my $vkeys=$hash{"$scope:keys:$symb"};
2474: my @keys=split(/:/,$vkeys);
2475: my $key;
2476: $returnhash{"$scope:keys"}=$vkeys;
2477: foreach $key (@keys) {
2478: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2479: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2480: }
2481: }
2482: if (!(untie(%hash))) {
2483: return "error:$!";
2484: }
2485: } else {
2486: return "error:$!";
2487: }
2488: return %returnhash;
2489: }
2490:
2491: # ----------------------------------------------------------------------- Store
2492:
2493: sub store {
2494: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2495: my $home='';
2496:
2497: if ($stuname) { $home=&homeserver($stuname,$domain); }
2498:
2499: $symb=&symbclean($symb);
2500: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2501:
2502: if (!$domain) { $domain=$env{'user.domain'}; }
2503: if (!$stuname) { $stuname=$env{'user.name'}; }
2504:
2505: &devalidate($symb,$stuname,$domain);
2506:
2507: $symb=escape($symb);
2508: if (!$namespace) {
2509: unless ($namespace=$env{'request.course.id'}) {
2510: return '';
2511: }
2512: }
2513: if (!$home) { $home=$env{'user.home'}; }
2514:
2515: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2516: $$storehash{'host'}=$perlvar{'lonHostID'};
2517:
2518: my $namevalue='';
2519: foreach (keys %$storehash) {
2520: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2521: }
2522: $namevalue=~s/\&$//;
2523: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2524: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2525: }
2526:
2527: # -------------------------------------------------------------- Critical Store
2528:
2529: sub cstore {
2530: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2531: my $home='';
2532:
2533: if ($stuname) { $home=&homeserver($stuname,$domain); }
2534:
2535: $symb=&symbclean($symb);
2536: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2537:
2538: if (!$domain) { $domain=$env{'user.domain'}; }
2539: if (!$stuname) { $stuname=$env{'user.name'}; }
2540:
2541: &devalidate($symb,$stuname,$domain);
2542:
2543: $symb=escape($symb);
2544: if (!$namespace) {
2545: unless ($namespace=$env{'request.course.id'}) {
2546: return '';
2547: }
2548: }
2549: if (!$home) { $home=$env{'user.home'}; }
2550:
2551: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2552: $$storehash{'host'}=$perlvar{'lonHostID'};
2553:
2554: my $namevalue='';
2555: foreach (keys %$storehash) {
2556: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2557: }
2558: $namevalue=~s/\&$//;
2559: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2560: return critical
2561: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2562: }
2563:
2564: # --------------------------------------------------------------------- Restore
2565:
2566: sub restore {
2567: my ($symb,$namespace,$domain,$stuname) = @_;
2568: my $home='';
2569:
2570: if ($stuname) { $home=&homeserver($stuname,$domain); }
2571:
2572: if (!$symb) {
2573: unless ($symb=escape(&symbread())) { return ''; }
2574: } else {
2575: $symb=&escape(&symbclean($symb));
2576: }
2577: if (!$namespace) {
2578: unless ($namespace=$env{'request.course.id'}) {
2579: return '';
2580: }
2581: }
2582: if (!$domain) { $domain=$env{'user.domain'}; }
2583: if (!$stuname) { $stuname=$env{'user.name'}; }
2584: if (!$home) { $home=$env{'user.home'}; }
2585: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2586:
2587: my %returnhash=();
2588: foreach (split(/\&/,$answer)) {
2589: my ($name,$value)=split(/\=/,$_);
2590: $returnhash{&unescape($name)}=&thaw_unescape($value);
2591: }
2592: my $version;
2593: for ($version=1;$version<=$returnhash{'version'};$version++) {
2594: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2595: $returnhash{$_}=$returnhash{$version.':'.$_};
2596: }
2597: }
2598: return %returnhash;
2599: }
2600:
2601: # ---------------------------------------------------------- Course Description
2602:
2603: sub coursedescription {
2604: my ($courseid,$args)=@_;
2605: $courseid=~s/^\///;
2606: $courseid=~s/\_/\//g;
2607: my ($cdomain,$cnum)=split(/\//,$courseid);
2608: my $chome=&homeserver($cnum,$cdomain);
2609: my $normalid=$cdomain.'_'.$cnum;
2610: # need to always cache even if we get errors otherwise we keep
2611: # trying and trying and trying to get the course description.
2612: my %envhash=();
2613: my %returnhash=();
2614:
2615: my $expiretime=600;
2616: if ($env{'request.course.id'} eq $normalid) {
2617: $expiretime=120;
2618: }
2619:
2620: my $prefix='course.'.$cdomain.'_'.$cnum.'.';
2621: if (!$args->{'freshen_cache'}
2622: && ((time-$env{$prefix.'last_cache'}) < $expiretime) ) {
2623: foreach my $key (keys(%env)) {
2624: next if ($key !~ /^\Q$prefix\E(.*)/);
2625: my ($setting) = $1;
2626: $returnhash{$setting} = $env{$key};
2627: }
2628: return %returnhash;
2629: }
2630:
2631: # get the data agin
2632: if (!$args->{'one_time'}) {
2633: $envhash{'course.'.$normalid.'.last_cache'}=time;
2634: }
2635: if ($chome ne 'no_host') {
2636: %returnhash=&dump('environment',$cdomain,$cnum);
2637: if (!exists($returnhash{'con_lost'})) {
2638: $returnhash{'home'}= $chome;
2639: $returnhash{'domain'} = $cdomain;
2640: $returnhash{'num'} = $cnum;
2641: while (my ($name,$value) = each %returnhash) {
2642: $envhash{'course.'.$normalid.'.'.$name}=$value;
2643: }
2644: $returnhash{'url'}=&clutter($returnhash{'url'});
2645: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2646: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2647: $envhash{'course.'.$normalid.'.home'}=$chome;
2648: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2649: $envhash{'course.'.$normalid.'.num'}=$cnum;
2650: }
2651: }
2652: if (!$args->{'one_time'}) {
2653: &appenv(%envhash);
2654: }
2655: return %returnhash;
2656: }
2657:
2658: # -------------------------------------------------See if a user is privileged
2659:
2660: sub privileged {
2661: my ($username,$domain)=@_;
2662: my $rolesdump=&reply("dump:$domain:$username:roles",
2663: &homeserver($username,$domain));
2664: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2665: my $now=time;
2666: if ($rolesdump ne '') {
2667: foreach (split(/&/,$rolesdump)) {
2668: if ($_!~/^rolesdef_/) {
2669: my ($area,$role)=split(/=/,$_);
2670: $area=~s/\_\w\w$//;
2671: my ($trole,$tend,$tstart)=split(/_/,$role);
2672: if (($trole eq 'dc') || ($trole eq 'su')) {
2673: my $active=1;
2674: if ($tend) {
2675: if ($tend<$now) { $active=0; }
2676: }
2677: if ($tstart) {
2678: if ($tstart>$now) { $active=0; }
2679: }
2680: if ($active) { return 1; }
2681: }
2682: }
2683: }
2684: }
2685: return 0;
2686: }
2687:
2688: # -------------------------------------------------------- Get user privileges
2689:
2690: sub rolesinit {
2691: my ($domain,$username,$authhost)=@_;
2692: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2693: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2694: my %allroles=();
2695: my %allgroups=();
2696: my $now=time;
2697: my $userroles="user.login.time=$now\n";
2698: my $group_privs;
2699:
2700: if ($rolesdump ne '') {
2701: foreach (split(/&/,$rolesdump)) {
2702: if ($_!~/^rolesdef_/) {
2703: my ($area,$role)=split(/=/,$_);
2704: $area=~s/\_\w\w$//;
2705: my ($trole,$tend,$tstart,$group_privs);
2706: if ($role=~/^cr/) {
2707: if ($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|) {
2708: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2709: ($tend,$tstart)=split('_',$trest);
2710: } else {
2711: $trole=$role;
2712: }
2713: } elsif ($role =~ m|^gr/|) {
2714: ($trole,$tend,$tstart) = split(/_/,$role);
2715: ($trole,$group_privs) = split(/\//,$trole);
2716: $group_privs = &unescape($group_privs);
2717: } else {
2718: ($trole,$tend,$tstart)=split(/_/,$role);
2719: }
2720: $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username);
2721: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2722: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2723: if (($area ne '') && ($trole ne '')) {
2724: my $spec=$trole.'.'.$area;
2725: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2726: if ($trole =~ /^cr\//) {
2727: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2728: } elsif ($trole eq 'gr') {
2729: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
2730: } else {
2731: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2732: }
2733: }
2734: }
2735: }
2736: my ($author,$adv) = &set_userprivs(\$userroles,\%allroles,\%allgroups);
2737: $userroles.='user.adv='.$adv."\n".
2738: 'user.author='.$author."\n";
2739: $env{'user.adv'}=$adv;
2740: }
2741: return $userroles;
2742: }
2743:
2744: sub set_arearole {
2745: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2746: # log the associated role with the area
2747: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2748: return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
2749: }
2750:
2751: sub custom_roleprivs {
2752: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2753: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2754: my $homsvr=homeserver($rauthor,$rdomain);
2755: if ($hostname{$homsvr} ne '') {
2756: my ($rdummy,$roledef)=
2757: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2758: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2759: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2760: if (defined($syspriv)) {
2761: $$allroles{'cm./'}.=':'.$syspriv;
2762: $$allroles{$spec.'./'}.=':'.$syspriv;
2763: }
2764: if ($tdomain ne '') {
2765: if (defined($dompriv)) {
2766: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2767: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2768: }
2769: if (($trest ne '') && (defined($coursepriv))) {
2770: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2771: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2772: }
2773: }
2774: }
2775: }
2776: }
2777:
2778: sub group_roleprivs {
2779: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
2780: my $access = 1;
2781: my $now = time;
2782: if (($tend!=0) && ($tend<$now)) { $access = 0; }
2783: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
2784: if ($access) {
2785: my ($course,$group) = ($area =~ m|(/\w+/\w+)/([^/]+)$|);
2786: $$allgroups{$course}{$group} .=':'.$group_privs;
2787: }
2788: }
2789:
2790: sub standard_roleprivs {
2791: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2792: if (defined($pr{$trole.':s'})) {
2793: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2794: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2795: }
2796: if ($tdomain ne '') {
2797: if (defined($pr{$trole.':d'})) {
2798: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2799: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2800: }
2801: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2802: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2803: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2804: }
2805: }
2806: }
2807:
2808: sub set_userprivs {
2809: my ($userroles,$allroles,$allgroups) = @_;
2810: my $author=0;
2811: my $adv=0;
2812: my %grouproles = ();
2813: if (keys(%{$allgroups}) > 0) {
2814: foreach my $role (keys %{$allroles}) {
2815: my ($trole,$area,$sec,$extendedarea);
2816: if ($role =~ m|^(\w+)\.(/\w+/\w+)(/?\w*)|) {
2817: $trole = $1;
2818: $area = $2;
2819: $sec = $3;
2820: $extendedarea = $area.$sec;
2821: if (exists($$allgroups{$area})) {
2822: foreach my $group (keys(%{$$allgroups{$area}})) {
2823: my $spec = $trole.'.'.$extendedarea;
2824: $grouproles{$spec.'.'.$area.'/'.$group} =
2825: $$allgroups{$area}{$group};
2826: }
2827: }
2828: }
2829: }
2830: }
2831: foreach (keys(%grouproles)) {
2832: $$allroles{$_} = $grouproles{$_};
2833: }
2834: foreach (keys %{$allroles}) {
2835: my %thesepriv=();
2836: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2837: foreach (split(/:/,$$allroles{$_})) {
2838: if ($_ ne '') {
2839: my ($privilege,$restrictions)=split(/&/,$_);
2840: if ($restrictions eq '') {
2841: $thesepriv{$privilege}='F';
2842: } elsif ($thesepriv{$privilege} ne 'F') {
2843: $thesepriv{$privilege}.=$restrictions;
2844: }
2845: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2846: }
2847: }
2848: my $thesestr='';
2849: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2850: $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
2851: }
2852: return ($author,$adv);
2853: }
2854:
2855: # --------------------------------------------------------------- get interface
2856:
2857: sub get {
2858: my ($namespace,$storearr,$udomain,$uname)=@_;
2859: my $items='';
2860: foreach (@$storearr) {
2861: $items.=escape($_).'&';
2862: }
2863: $items=~s/\&$//;
2864: if (!$udomain) { $udomain=$env{'user.domain'}; }
2865: if (!$uname) { $uname=$env{'user.name'}; }
2866: my $uhome=&homeserver($uname,$udomain);
2867:
2868: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2869: my @pairs=split(/\&/,$rep);
2870: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2871: return @pairs;
2872: }
2873: my %returnhash=();
2874: my $i=0;
2875: foreach (@$storearr) {
2876: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2877: $i++;
2878: }
2879: return %returnhash;
2880: }
2881:
2882: # --------------------------------------------------------------- del interface
2883:
2884: sub del {
2885: my ($namespace,$storearr,$udomain,$uname)=@_;
2886: my $items='';
2887: foreach (@$storearr) {
2888: $items.=escape($_).'&';
2889: }
2890: $items=~s/\&$//;
2891: if (!$udomain) { $udomain=$env{'user.domain'}; }
2892: if (!$uname) { $uname=$env{'user.name'}; }
2893: my $uhome=&homeserver($uname,$udomain);
2894:
2895: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2896: }
2897:
2898: # -------------------------------------------------------------- dump interface
2899:
2900: sub dump {
2901: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2902: if (!$udomain) { $udomain=$env{'user.domain'}; }
2903: if (!$uname) { $uname=$env{'user.name'}; }
2904: my $uhome=&homeserver($uname,$udomain);
2905: if ($regexp) {
2906: $regexp=&escape($regexp);
2907: } else {
2908: $regexp='.';
2909: }
2910: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
2911: my @pairs=split(/\&/,$rep);
2912: my %returnhash=();
2913: foreach (@pairs) {
2914: my ($key,$value)=split(/=/,$_,2);
2915: $returnhash{unescape($key)}=&thaw_unescape($value);
2916: }
2917: return %returnhash;
2918: }
2919:
2920: # --------------------------------------------------------- dumpstore interface
2921:
2922: sub dumpstore {
2923: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2924: return &dump($namespace,$udomain,$uname,$regexp,$range);
2925: }
2926:
2927: # -------------------------------------------------------------- keys interface
2928:
2929: sub getkeys {
2930: my ($namespace,$udomain,$uname)=@_;
2931: if (!$udomain) { $udomain=$env{'user.domain'}; }
2932: if (!$uname) { $uname=$env{'user.name'}; }
2933: my $uhome=&homeserver($uname,$udomain);
2934: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2935: my @keyarray=();
2936: foreach (split(/\&/,$rep)) {
2937: push (@keyarray,&unescape($_));
2938: }
2939: return @keyarray;
2940: }
2941:
2942: # --------------------------------------------------------------- currentdump
2943: sub currentdump {
2944: my ($courseid,$sdom,$sname)=@_;
2945: $courseid = $env{'request.course.id'} if (! defined($courseid));
2946: $sdom = $env{'user.domain'} if (! defined($sdom));
2947: $sname = $env{'user.name'} if (! defined($sname));
2948: my $uhome = &homeserver($sname,$sdom);
2949: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2950: return if ($rep =~ /^(error:|no_such_host)/);
2951: #
2952: my %returnhash=();
2953: #
2954: if ($rep eq "unknown_cmd") {
2955: # an old lond will not know currentdump
2956: # Do a dump and make it look like a currentdump
2957: my @tmp = &dump($courseid,$sdom,$sname,'.');
2958: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2959: my %hash = @tmp;
2960: @tmp=();
2961: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2962: } else {
2963: my @pairs=split(/\&/,$rep);
2964: foreach (@pairs) {
2965: my ($key,$value)=split(/=/,$_);
2966: my ($symb,$param) = split(/:/,$key);
2967: $returnhash{&unescape($symb)}->{&unescape($param)} =
2968: &thaw_unescape($value);
2969: }
2970: }
2971: return %returnhash;
2972: }
2973:
2974: sub convert_dump_to_currentdump{
2975: my %hash = %{shift()};
2976: my %returnhash;
2977: # Code ripped from lond, essentially. The only difference
2978: # here is the unescaping done by lonnet::dump(). Conceivably
2979: # we might run in to problems with parameter names =~ /^v\./
2980: while (my ($key,$value) = each(%hash)) {
2981: my ($v,$symb,$param) = split(/:/,$key);
2982: next if ($v eq 'version' || $symb eq 'keys');
2983: next if (exists($returnhash{$symb}) &&
2984: exists($returnhash{$symb}->{$param}) &&
2985: $returnhash{$symb}->{'v.'.$param} > $v);
2986: $returnhash{$symb}->{$param}=$value;
2987: $returnhash{$symb}->{'v.'.$param}=$v;
2988: }
2989: #
2990: # Remove all of the keys in the hashes which keep track of
2991: # the version of the parameter.
2992: while (my ($symb,$param_hash) = each(%returnhash)) {
2993: # use a foreach because we are going to delete from the hash.
2994: foreach my $key (keys(%$param_hash)) {
2995: delete($param_hash->{$key}) if ($key =~ /^v\./);
2996: }
2997: }
2998: return \%returnhash;
2999: }
3000:
3001: # ------------------------------------------------------ critical inc interface
3002:
3003: sub cinc {
3004: return &inc(@_,'critical');
3005: }
3006:
3007: # --------------------------------------------------------------- inc interface
3008:
3009: sub inc {
3010: my ($namespace,$store,$udomain,$uname,$critical) = @_;
3011: if (!$udomain) { $udomain=$env{'user.domain'}; }
3012: if (!$uname) { $uname=$env{'user.name'}; }
3013: my $uhome=&homeserver($uname,$udomain);
3014: my $items='';
3015: if (! ref($store)) {
3016: # got a single value, so use that instead
3017: $items = &escape($store).'=&';
3018: } elsif (ref($store) eq 'SCALAR') {
3019: $items = &escape($$store).'=&';
3020: } elsif (ref($store) eq 'ARRAY') {
3021: $items = join('=&',map {&escape($_);} @{$store});
3022: } elsif (ref($store) eq 'HASH') {
3023: while (my($key,$value) = each(%{$store})) {
3024: $items.= &escape($key).'='.&escape($value).'&';
3025: }
3026: }
3027: $items=~s/\&$//;
3028: if ($critical) {
3029: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
3030: } else {
3031: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
3032: }
3033: }
3034:
3035: # --------------------------------------------------------------- put interface
3036:
3037: sub put {
3038: my ($namespace,$storehash,$udomain,$uname)=@_;
3039: if (!$udomain) { $udomain=$env{'user.domain'}; }
3040: if (!$uname) { $uname=$env{'user.name'}; }
3041: my $uhome=&homeserver($uname,$udomain);
3042: my $items='';
3043: foreach (keys %$storehash) {
3044: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3045: }
3046: $items=~s/\&$//;
3047: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3048: }
3049:
3050: # ------------------------------------------------------------ newput interface
3051:
3052: sub newput {
3053: my ($namespace,$storehash,$udomain,$uname)=@_;
3054: if (!$udomain) { $udomain=$env{'user.domain'}; }
3055: if (!$uname) { $uname=$env{'user.name'}; }
3056: my $uhome=&homeserver($uname,$udomain);
3057: my $items='';
3058: foreach my $key (keys(%$storehash)) {
3059: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3060: }
3061: $items=~s/\&$//;
3062: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
3063: }
3064:
3065: # --------------------------------------------------------- putstore interface
3066:
3067: sub putstore {
3068: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3069: if (!$udomain) { $udomain=$env{'user.domain'}; }
3070: if (!$uname) { $uname=$env{'user.name'}; }
3071: my $uhome=&homeserver($uname,$udomain);
3072: my $items='';
3073: foreach my $key (keys(%$storehash)) {
3074: $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
3075: }
3076: $items=~s/\&$//;
3077: my $esc_symb=&escape($symb);
3078: my $esc_v=&escape($version);
3079: my $reply =
3080: &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
3081: $uhome);
3082: if ($reply eq 'unknown_cmd') {
3083: # gfall back to way things use to be done
3084: return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
3085: $uname);
3086: }
3087: return $reply;
3088: }
3089:
3090: sub old_putstore {
3091: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3092: if (!$udomain) { $udomain=$env{'user.domain'}; }
3093: if (!$uname) { $uname=$env{'user.name'}; }
3094: my $uhome=&homeserver($uname,$udomain);
3095: my %newstorehash;
3096: foreach (keys %$storehash) {
3097: my $key = $version.':'.&escape($symb).':'.$_;
3098: $newstorehash{$key} = $storehash->{$_};
3099: }
3100: my $items='';
3101: my %allitems = ();
3102: foreach (keys %newstorehash) {
3103: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
3104: my $key = $1.':keys:'.$2;
3105: $allitems{$key} .= $3.':';
3106: }
3107: $items.=$_.'='.&freeze_escape($newstorehash{$_}).'&';
3108: }
3109: foreach (keys %allitems) {
3110: $allitems{$_} =~ s/\:$//;
3111: $items.= $_.'='.$allitems{$_}.'&';
3112: }
3113: $items=~s/\&$//;
3114: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3115: }
3116:
3117: # ------------------------------------------------------ critical put interface
3118:
3119: sub cput {
3120: my ($namespace,$storehash,$udomain,$uname)=@_;
3121: if (!$udomain) { $udomain=$env{'user.domain'}; }
3122: if (!$uname) { $uname=$env{'user.name'}; }
3123: my $uhome=&homeserver($uname,$udomain);
3124: my $items='';
3125: foreach (keys %$storehash) {
3126: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3127: }
3128: $items=~s/\&$//;
3129: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
3130: }
3131:
3132: # -------------------------------------------------------------- eget interface
3133:
3134: sub eget {
3135: my ($namespace,$storearr,$udomain,$uname)=@_;
3136: my $items='';
3137: foreach (@$storearr) {
3138: $items.=escape($_).'&';
3139: }
3140: $items=~s/\&$//;
3141: if (!$udomain) { $udomain=$env{'user.domain'}; }
3142: if (!$uname) { $uname=$env{'user.name'}; }
3143: my $uhome=&homeserver($uname,$udomain);
3144: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3145: my @pairs=split(/\&/,$rep);
3146: my %returnhash=();
3147: my $i=0;
3148: foreach (@$storearr) {
3149: $returnhash{$_}=&thaw_unescape($pairs[$i]);
3150: $i++;
3151: }
3152: return %returnhash;
3153: }
3154:
3155: # ------------------------------------------------------------ tmpput interface
3156: sub tmpput {
3157: my ($storehash,$server)=@_;
3158: my $items='';
3159: foreach (keys(%$storehash)) {
3160: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3161: }
3162: $items=~s/\&$//;
3163: return &reply("tmpput:$items",$server);
3164: }
3165:
3166: # ------------------------------------------------------------ tmpget interface
3167: sub tmpget {
3168: my ($token,$server)=@_;
3169: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3170: my $rep=&reply("tmpget:$token",$server);
3171: my %returnhash;
3172: foreach my $item (split(/\&/,$rep)) {
3173: my ($key,$value)=split(/=/,$item);
3174: $returnhash{&unescape($key)}=&thaw_unescape($value);
3175: }
3176: return %returnhash;
3177: }
3178:
3179: # ------------------------------------------------------------ tmpget interface
3180: sub tmpdel {
3181: my ($token,$server)=@_;
3182: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3183: return &reply("tmpdel:$token",$server);
3184: }
3185:
3186: # ---------------------------------------------- Custom access rule evaluation
3187:
3188: sub customaccess {
3189: my ($priv,$uri)=@_;
3190: my ($urole,$urealm)=split(/\./,$env{'request.role'});
3191: $urealm=~s/^\W//;
3192: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
3193: my $access=0;
3194: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
3195: my ($effect,$realm,$role)=split(/\:/,$_);
3196: if ($role) {
3197: if ($role ne $urole) { next; }
3198: }
3199: foreach (split(/\s*\,\s*/,$realm)) {
3200: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
3201: if ($tdom) {
3202: if ($tdom ne $udom) { next; }
3203: }
3204: if ($tcrs) {
3205: if ($tcrs ne $ucrs) { next; }
3206: }
3207: if ($tsec) {
3208: if ($tsec ne $usec) { next; }
3209: }
3210: $access=($effect eq 'allow');
3211: last;
3212: }
3213: if ($realm eq '' && $role eq '') {
3214: $access=($effect eq 'allow');
3215: }
3216: }
3217: return $access;
3218: }
3219:
3220: # ------------------------------------------------- Check for a user privilege
3221:
3222: sub allowed {
3223: my ($priv,$uri,$symb)=@_;
3224: my $ver_orguri=$uri;
3225: $uri=&deversion($uri);
3226: my $orguri=$uri;
3227: $uri=&declutter($uri);
3228:
3229: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3230: # Free bre access to adm and meta resources
3231: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
3232: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
3233: return 'F';
3234: }
3235:
3236: # Free bre access to user's own portfolio contents
3237: my ($space,$domain,$name,@dir)=split('/',$uri);
3238: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3239: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
3240: return 'F';
3241: }
3242:
3243: # bre access to group if user has rgf priv for this group and course.
3244: if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
3245: && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
3246: if (exists($env{'request.course.id'})) {
3247: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
3248: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
3249: if (($domain eq $cdom) && ($name eq $cnum)) {
3250: my $courseprivid=$env{'request.course.id'};
3251: $courseprivid=~s/\_/\//;
3252: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
3253: .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
3254: return $1;
3255: }
3256: }
3257: }
3258: }
3259:
3260: # Free bre to public access
3261:
3262: if ($priv eq 'bre') {
3263: my $copyright=&metadata($uri,'copyright');
3264: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3265: return 'F';
3266: }
3267: if ($copyright eq 'priv') {
3268: $uri=~/([^\/]+)\/([^\/]+)\//;
3269: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3270: return '';
3271: }
3272: }
3273: if ($copyright eq 'domain') {
3274: $uri=~/([^\/]+)\/([^\/]+)\//;
3275: unless (($env{'user.domain'} eq $1) ||
3276: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3277: return '';
3278: }
3279: }
3280: if ($env{'request.role'}=~ /li\.\//) {
3281: # Library role, so allow browsing of resources in this domain.
3282: return 'F';
3283: }
3284: if ($copyright eq 'custom') {
3285: unless (&customaccess($priv,$uri)) { return ''; }
3286: }
3287: }
3288: # Domain coordinator is trying to create a course
3289: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3290: # uri is the requested domain in this case.
3291: # comparison to 'request.role.domain' shows if the user has selected
3292: # a role of dc for the domain in question.
3293: return 'F' if ($uri eq $env{'request.role.domain'});
3294: }
3295:
3296: my $thisallowed='';
3297: my $statecond=0;
3298: my $courseprivid='';
3299:
3300: # Course
3301:
3302: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3303: $thisallowed.=$1;
3304: }
3305:
3306: # Domain
3307:
3308: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3309: =~/\Q$priv\E\&([^\:]*)/) {
3310: $thisallowed.=$1;
3311: }
3312:
3313: # Course: uri itself is a course
3314: my $courseuri=$uri;
3315: $courseuri=~s/\_(\d)/\/$1/;
3316: $courseuri=~s/^([^\/])/\/$1/;
3317:
3318: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3319: =~/\Q$priv\E\&([^\:]*)/) {
3320: $thisallowed.=$1;
3321: }
3322:
3323: # Group: uri itself is a group
3324: my $groupuri=$uri;
3325: $groupuri=~s/^([^\/])/\/$1/;
3326: if ($env{'user.priv.'.$env{'request.role'}.'.'.$groupuri}
3327: =~/\Q$priv\E\&([^\:]*)/) {
3328: $thisallowed.=$1;
3329: }
3330:
3331: # URI is an uploaded document for this course, default permissions don't matter
3332: # not allowing 'edit' access (editupload) to uploaded course docs
3333: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3334: $thisallowed='';
3335: my ($match)=&is_on_map($uri);
3336: if ($match) {
3337: if ($env{'user.priv.'.$env{'request.role'}.'./'}
3338: =~/\Q$priv\E\&([^\:]*)/) {
3339: $thisallowed.=$1;
3340: }
3341: } else {
3342: my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
3343: if ($refuri) {
3344: if ($refuri =~ m|^/adm/|) {
3345: $thisallowed='F';
3346: } else {
3347: $refuri=&declutter($refuri);
3348: my ($match) = &is_on_map($refuri);
3349: if ($match) {
3350: $thisallowed='F';
3351: }
3352: }
3353: }
3354: }
3355: }
3356:
3357: # Full access at system, domain or course-wide level? Exit.
3358:
3359: if ($thisallowed=~/F/) {
3360: return 'F';
3361: }
3362:
3363: # If this is generating or modifying users, exit with special codes
3364:
3365: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3366: if (($priv eq 'cca') || ($priv eq 'caa')) {
3367: my ($audom,$auname)=split('/',$uri);
3368: # no author name given, so this just checks on the general right to make a co-author in this domain
3369: unless ($auname) { return $thisallowed; }
3370: # an author name is given, so we are about to actually make a co-author for a certain account
3371: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3372: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3373: ($audom ne $env{'request.role.domain'}))) { return ''; }
3374: }
3375: return $thisallowed;
3376: }
3377: #
3378: # Gathered so far: system, domain and course wide privileges
3379: #
3380: # Course: See if uri or referer is an individual resource that is part of
3381: # the course
3382:
3383: if ($env{'request.course.id'}) {
3384:
3385: $courseprivid=$env{'request.course.id'};
3386: if ($env{'request.course.sec'}) {
3387: $courseprivid.='/'.$env{'request.course.sec'};
3388: }
3389: $courseprivid=~s/\_/\//;
3390: my $checkreferer=1;
3391: my ($match,$cond)=&is_on_map($uri);
3392: if ($match) {
3393: $statecond=$cond;
3394: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3395: =~/\Q$priv\E\&([^\:]*)/) {
3396: $thisallowed.=$1;
3397: $checkreferer=0;
3398: }
3399: }
3400:
3401: if ($checkreferer) {
3402: my $refuri=$env{'httpref.'.$orguri};
3403: unless ($refuri) {
3404: foreach (keys %env) {
3405: if ($_=~/^httpref\..*\*/) {
3406: my $pattern=$_;
3407: $pattern=~s/^httpref\.\/res\///;
3408: $pattern=~s/\*/\[\^\/\]\+/g;
3409: $pattern=~s/\//\\\//g;
3410: if ($orguri=~/$pattern/) {
3411: $refuri=$env{$_};
3412: }
3413: }
3414: }
3415: }
3416:
3417: if ($refuri) {
3418: $refuri=&declutter($refuri);
3419: my ($match,$cond)=&is_on_map($refuri);
3420: if ($match) {
3421: my $refstatecond=$cond;
3422: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3423: =~/\Q$priv\E\&([^\:]*)/) {
3424: $thisallowed.=$1;
3425: $uri=$refuri;
3426: $statecond=$refstatecond;
3427: }
3428: }
3429: }
3430: }
3431: }
3432:
3433: #
3434: # Gathered now: all privileges that could apply, and condition number
3435: #
3436: #
3437: # Full or no access?
3438: #
3439:
3440: if ($thisallowed=~/F/) {
3441: return 'F';
3442: }
3443:
3444: unless ($thisallowed) {
3445: return '';
3446: }
3447:
3448: # Restrictions exist, deal with them
3449: #
3450: # C:according to course preferences
3451: # R:according to resource settings
3452: # L:unless locked
3453: # X:according to user session state
3454: #
3455:
3456: # Possibly locked functionality, check all courses
3457: # Locks might take effect only after 10 minutes cache expiration for other
3458: # courses, and 2 minutes for current course
3459:
3460: my $envkey;
3461: if ($thisallowed=~/L/) {
3462: foreach $envkey (keys %env) {
3463: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3464: my $courseid=$2;
3465: my $roleid=$1.'.'.$2;
3466: $courseid=~s/^\///;
3467: my $expiretime=600;
3468: if ($env{'request.role'} eq $roleid) {
3469: $expiretime=120;
3470: }
3471: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3472: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3473: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3474: &coursedescription($courseid,{'freshen_cache' => 1});
3475: }
3476: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3477: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3478: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3479: &log($env{'user.domain'},$env{'user.name'},
3480: $env{'user.home'},
3481: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3482: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3483: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3484: return '';
3485: }
3486: }
3487: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3488: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3489: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3490: &log($env{'user.domain'},$env{'user.name'},
3491: $env{'user.home'},
3492: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3493: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3494: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3495: return '';
3496: }
3497: }
3498: }
3499: }
3500: }
3501:
3502: #
3503: # Rest of the restrictions depend on selected course
3504: #
3505:
3506: unless ($env{'request.course.id'}) {
3507: return '1';
3508: }
3509:
3510: #
3511: # Now user is definitely in a course
3512: #
3513:
3514:
3515: # Course preferences
3516:
3517: if ($thisallowed=~/C/) {
3518: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3519: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
3520: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
3521: =~/\Q$rolecode\E/) {
3522: if ($priv ne 'pch') {
3523: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3524: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3525: $env{'request.course.id'});
3526: }
3527: return '';
3528: }
3529:
3530: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
3531: =~/\Q$unamedom\E/) {
3532: if ($priv ne 'pch') {
3533: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
3534: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3535: $env{'request.course.id'});
3536: }
3537: return '';
3538: }
3539: }
3540:
3541: # Resource preferences
3542:
3543: if ($thisallowed=~/R/) {
3544: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3545: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3546: if ($priv ne 'pch') {
3547: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3548: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3549: }
3550: return '';
3551: }
3552: }
3553:
3554: # Restricted by state or randomout?
3555:
3556: if ($thisallowed=~/X/) {
3557: if ($env{'acc.randomout'}) {
3558: if (!$symb) { $symb=&symbread($uri,1); }
3559: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3560: return '';
3561: }
3562: }
3563: if (&condval($statecond)) {
3564: return '2';
3565: } else {
3566: return '';
3567: }
3568: }
3569:
3570: return 'F';
3571: }
3572:
3573: sub split_uri_for_cond {
3574: my $uri=&deversion(&declutter(shift));
3575: my @uriparts=split(/\//,$uri);
3576: my $filename=pop(@uriparts);
3577: my $pathname=join('/',@uriparts);
3578: return ($pathname,$filename);
3579: }
3580: # --------------------------------------------------- Is a resource on the map?
3581:
3582: sub is_on_map {
3583: my ($pathname,$filename) = &split_uri_for_cond(shift);
3584: #Trying to find the conditional for the file
3585: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3586: /\&\Q$filename\E\:([\d\|]+)\&/);
3587: if ($match) {
3588: return (1,$1);
3589: } else {
3590: return (0,0);
3591: }
3592: }
3593:
3594: # --------------------------------------------------------- Get symb from alias
3595:
3596: sub get_symb_from_alias {
3597: my $symb=shift;
3598: my ($map,$resid,$url)=&decode_symb($symb);
3599: # Already is a symb
3600: if ($url) { return $symb; }
3601: # Must be an alias
3602: my $aliassymb='';
3603: my %bighash;
3604: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
3605: &GDBM_READER(),0640)) {
3606: my $rid=$bighash{'mapalias_'.$symb};
3607: if ($rid) {
3608: my ($mapid,$resid)=split(/\./,$rid);
3609: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3610: $resid,$bighash{'src_'.$rid});
3611: }
3612: untie %bighash;
3613: }
3614: return $aliassymb;
3615: }
3616:
3617: # ----------------------------------------------------------------- Define Role
3618:
3619: sub definerole {
3620: if (allowed('mcr','/')) {
3621: my ($rolename,$sysrole,$domrole,$courole)=@_;
3622: foreach (split(':',$sysrole)) {
3623: my ($crole,$cqual)=split(/\&/,$_);
3624: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3625: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3626: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3627: return "refused:s:$crole&$cqual";
3628: }
3629: }
3630: }
3631: foreach (split(':',$domrole)) {
3632: my ($crole,$cqual)=split(/\&/,$_);
3633: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3634: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3635: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3636: return "refused:d:$crole&$cqual";
3637: }
3638: }
3639: }
3640: foreach (split(':',$courole)) {
3641: my ($crole,$cqual)=split(/\&/,$_);
3642: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3643: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3644: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3645: return "refused:c:$crole&$cqual";
3646: }
3647: }
3648: }
3649: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3650: "$env{'user.domain'}:$env{'user.name'}:".
3651: "rolesdef_$rolename=".
3652: escape($sysrole.'_'.$domrole.'_'.$courole);
3653: return reply($command,$env{'user.home'});
3654: } else {
3655: return 'refused';
3656: }
3657: }
3658:
3659: # ---------------- Make a metadata query against the network of library servers
3660:
3661: sub metadata_query {
3662: my ($query,$custom,$customshow,$server_array)=@_;
3663: my %rhash;
3664: my @server_list = (defined($server_array) ? @$server_array
3665: : keys(%libserv) );
3666: for my $server (@server_list) {
3667: unless ($custom or $customshow) {
3668: my $reply=&reply("querysend:".&escape($query),$server);
3669: $rhash{$server}=$reply;
3670: }
3671: else {
3672: my $reply=&reply("querysend:".&escape($query).':'.
3673: &escape($custom).':'.&escape($customshow),
3674: $server);
3675: $rhash{$server}=$reply;
3676: }
3677: }
3678: return \%rhash;
3679: }
3680:
3681: # ----------------------------------------- Send log queries and wait for reply
3682:
3683: sub log_query {
3684: my ($uname,$udom,$query,%filters)=@_;
3685: my $uhome=&homeserver($uname,$udom);
3686: if ($uhome eq 'no_host') { return 'error: no_host'; }
3687: my $uhost=$hostname{$uhome};
3688: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3689: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3690: $uhome);
3691: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3692: return get_query_reply($queryid);
3693: }
3694:
3695: # ------- Request retrieval of institutional classlists for course(s)
3696:
3697: sub fetch_enrollment_query {
3698: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3699: my $homeserver;
3700: my $maxtries = 1;
3701: if ($context eq 'automated') {
3702: $homeserver = $perlvar{'lonHostID'};
3703: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3704: } else {
3705: $homeserver = &homeserver($cnum,$dom);
3706: }
3707: my $host=$hostname{$homeserver};
3708: my $cmd = '';
3709: foreach (keys %{$affiliatesref}) {
3710: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3711: }
3712: $cmd =~ s/%%$//;
3713: $cmd = &escape($cmd);
3714: my $query = 'fetchenrollment';
3715: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
3716: unless ($queryid=~/^\Q$host\E\_/) {
3717: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3718: return 'error: '.$queryid;
3719: }
3720: my $reply = &get_query_reply($queryid);
3721: my $tries = 1;
3722: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3723: $reply = &get_query_reply($queryid);
3724: $tries ++;
3725: }
3726: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3727: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3728: } else {
3729: my @responses = split/:/,$reply;
3730: if ($homeserver eq $perlvar{'lonHostID'}) {
3731: foreach (@responses) {
3732: my ($key,$value) = split/=/,$_;
3733: $$replyref{$key} = $value;
3734: }
3735: } else {
3736: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3737: foreach (@responses) {
3738: my ($key,$value) = split/=/,$_;
3739: $$replyref{$key} = $value;
3740: if ($value > 0) {
3741: foreach (@{$$affiliatesref{$key}}) {
3742: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3743: my $destname = $pathname.'/'.$filename;
3744: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3745: if ($xml_classlist =~ /^error/) {
3746: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3747: } else {
3748: if ( open(FILE,">$destname") ) {
3749: print FILE &unescape($xml_classlist);
3750: close(FILE);
3751: } else {
3752: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3753: }
3754: }
3755: }
3756: }
3757: }
3758: }
3759: return 'ok';
3760: }
3761: return 'error';
3762: }
3763:
3764: sub get_query_reply {
3765: my $queryid=shift;
3766: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3767: my $reply='';
3768: for (1..100) {
3769: sleep 2;
3770: if (-e $replyfile.'.end') {
3771: if (open(my $fh,$replyfile)) {
3772: $reply.=<$fh>;
3773: close($fh);
3774: } else { return 'error: reply_file_error'; }
3775: return &unescape($reply);
3776: }
3777: }
3778: return 'timeout:'.$queryid;
3779: }
3780:
3781: sub courselog_query {
3782: #
3783: # possible filters:
3784: # url: url or symb
3785: # username
3786: # domain
3787: # action: view, submit, grade
3788: # start: timestamp
3789: # end: timestamp
3790: #
3791: my (%filters)=@_;
3792: unless ($env{'request.course.id'}) { return 'no_course'; }
3793: if ($filters{'url'}) {
3794: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3795: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3796: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3797: }
3798: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
3799: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
3800: return &log_query($cname,$cdom,'courselog',%filters);
3801: }
3802:
3803: sub userlog_query {
3804: my ($uname,$udom,%filters)=@_;
3805: return &log_query($uname,$udom,'userlog',%filters);
3806: }
3807:
3808: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3809:
3810: sub auto_run {
3811: my ($cnum,$cdom) = @_;
3812: my $homeserver = &homeserver($cnum,$cdom);
3813: my $response = &reply('autorun:'.$cdom,$homeserver);
3814: return $response;
3815: }
3816:
3817: sub auto_get_sections {
3818: my ($cnum,$cdom,$inst_coursecode) = @_;
3819: my $homeserver = &homeserver($cnum,$cdom);
3820: my @secs = ();
3821: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3822: unless ($response eq 'refused') {
3823: @secs = split/:/,$response;
3824: }
3825: return @secs;
3826: }
3827:
3828: sub auto_new_course {
3829: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3830: my $homeserver = &homeserver($cnum,$cdom);
3831: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3832: return $response;
3833: }
3834:
3835: sub auto_validate_courseID {
3836: my ($cnum,$cdom,$inst_course_id) = @_;
3837: my $homeserver = &homeserver($cnum,$cdom);
3838: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3839: return $response;
3840: }
3841:
3842: sub auto_create_password {
3843: my ($cnum,$cdom,$authparam) = @_;
3844: my $homeserver = &homeserver($cnum,$cdom);
3845: my $create_passwd = 0;
3846: my $authchk = '';
3847: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3848: if ($response eq 'refused') {
3849: $authchk = 'refused';
3850: } else {
3851: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3852: }
3853: return ($authparam,$create_passwd,$authchk);
3854: }
3855:
3856: sub auto_photo_permission {
3857: my ($cnum,$cdom,$students) = @_;
3858: my $homeserver = &homeserver($cnum,$cdom);
3859: my ($outcome,$perm_reqd,$conditions) =
3860: split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
3861: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
3862: return (undef,undef);
3863: }
3864: return ($outcome,$perm_reqd,$conditions);
3865: }
3866:
3867: sub auto_checkphotos {
3868: my ($uname,$udom,$pid) = @_;
3869: my $homeserver = &homeserver($uname,$udom);
3870: my ($result,$resulttype);
3871: my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
3872: &escape($uname).':'.&escape($pid),
3873: $homeserver));
3874: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
3875: return (undef,undef);
3876: }
3877: if ($outcome) {
3878: ($result,$resulttype) = split(/:/,$outcome);
3879: }
3880: return ($result,$resulttype);
3881: }
3882:
3883: sub auto_photochoice {
3884: my ($cnum,$cdom) = @_;
3885: my $homeserver = &homeserver($cnum,$cdom);
3886: my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
3887: &escape($cdom),
3888: $homeserver)));
3889: if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
3890: return (undef,undef);
3891: }
3892: return ($update,$comment);
3893: }
3894:
3895: sub auto_photoupdate {
3896: my ($affiliatesref,$dom,$cnum,$photo) = @_;
3897: my $homeserver = &homeserver($cnum,$dom);
3898: my $host=$hostname{$homeserver};
3899: my $cmd = '';
3900: my $maxtries = 1;
3901: foreach (keys %{$affiliatesref}) {
3902: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3903: }
3904: $cmd =~ s/%%$//;
3905: $cmd = &escape($cmd);
3906: my $query = 'institutionalphotos';
3907: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
3908: unless ($queryid=~/^\Q$host\E\_/) {
3909: &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
3910: return 'error: '.$queryid;
3911: }
3912: my $reply = &get_query_reply($queryid);
3913: my $tries = 1;
3914: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3915: $reply = &get_query_reply($queryid);
3916: $tries ++;
3917: }
3918: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3919: &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3920: } else {
3921: my @responses = split(/:/,$reply);
3922: my $outcome = shift(@responses);
3923: foreach my $item (@responses) {
3924: my ($key,$value) = split(/=/,$item);
3925: $$photo{$key} = $value;
3926: }
3927: return $outcome;
3928: }
3929: return 'error';
3930: }
3931:
3932: sub auto_instcode_format {
3933: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3934: my $courses = '';
3935: my $homeserver;
3936: if ($caller eq 'global') {
3937: foreach my $tryserver (keys %libserv) {
3938: if ($hostdom{$tryserver} eq $codedom) {
3939: $homeserver = $tryserver;
3940: last;
3941: }
3942: }
3943: if (($env{'user.name'}) && ($env{'user.domain'} eq $codedom)) {
3944: $homeserver = &homeserver($env{'user.name'},$codedom);
3945: }
3946: } else {
3947: $homeserver = &homeserver($caller,$codedom);
3948: }
3949: foreach (keys %{$instcodes}) {
3950: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3951: }
3952: chop($courses);
3953: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3954: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3955: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3956: %{$codes} = &str2hash($codes_str);
3957: @{$codetitles} = &str2array($codetitles_str);
3958: %{$cat_titles} = &str2hash($cat_titles_str);
3959: %{$cat_order} = &str2hash($cat_order_str);
3960: return 'ok';
3961: }
3962: return $response;
3963: }
3964:
3965: # ------------------------------------------------------- Course Group routines
3966:
3967: sub get_coursegroups {
3968: my ($cdom,$cnum,$group) = @_;
3969: return(&dump('coursegroups',$cdom,$cnum,$group));
3970: }
3971:
3972: sub modify_coursegroup {
3973: my ($cdom,$cnum,$groupsettings) = @_;
3974: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
3975: }
3976:
3977: sub modify_group_roles {
3978: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
3979: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
3980: my $role = 'gr/'.&escape($userprivs);
3981: my ($uname,$udom) = split(/:/,$user);
3982: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
3983: if ($result eq 'ok') {
3984: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
3985: }
3986:
3987: return $result;
3988: }
3989:
3990: sub modify_coursegroup_membership {
3991: my ($cdom,$cnum,$membership) = @_;
3992: my $result = &put('groupmembership',$membership,$cdom,$cnum);
3993: return $result;
3994: }
3995:
3996: sub get_active_groups {
3997: my ($udom,$uname,$cdom,$cnum) = @_;
3998: my $now = time;
3999: my %groups = ();
4000: foreach my $key (keys(%env)) {
4001: if ($key =~ m-user\.role\.gr\./([^/]+)/([^/]+)/(\w+)$-) {
4002: my ($start,$end) = split(/\./,$env{$key});
4003: if (($end!=0) && ($end<$now)) { next; }
4004: if (($start!=0) && ($start>$now)) { next; }
4005: if ($1 eq $cdom && $2 eq $cnum) {
4006: $groups{$3} = $env{$key} ;
4007: }
4008: }
4009: }
4010: return %groups;
4011: }
4012:
4013: sub get_group_membership {
4014: my ($cdom,$cnum,$group) = @_;
4015: return(&dump('groupmembership',$cdom,$cnum,$group));
4016: }
4017:
4018: sub get_users_groups {
4019: my ($udom,$uname,$courseid) = @_;
4020: my $cachetime=1800;
4021: $courseid=~s/\_/\//g;
4022: $courseid=~s/^(\w)/\/$1/;
4023:
4024: my $hashid="$udom:$uname:$courseid";
4025: my ($result,$cached)=&is_cached_new('getgroups',$hashid);
4026: if (defined($cached)) { return $result; }
4027:
4028: my %roleshash = &dump('roles',$udom,$uname,$courseid);
4029: my ($tmp) = keys(%roleshash);
4030: if ($tmp=~/^error:/) {
4031: &logthis('Error retrieving roles: '.$tmp.' for '.$uname.':'.$udom);
4032: return '';
4033: } else {
4034: my $grouplist;
4035: foreach my $key (keys %roleshash) {
4036: if ($key =~ /^\Q$courseid\E\/(\w+)\_gr$/) {
4037: unless ($roleshash{$key} =~ /_\d+_\-1$/) { # deleted membership
4038: $grouplist .= $1.':';
4039: }
4040: }
4041: }
4042: $grouplist =~ s/:$//;
4043: return &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
4044: }
4045: }
4046:
4047: sub devalidate_getgroups_cache {
4048: my ($udom,$uname,$cdom,$cnum)=@_;
4049: my $courseid = $cdom.'_'.$cnum;
4050: $courseid=~s/\_/\//g;
4051: $courseid=~s/^(\w)/\/$1/;
4052: my $hashid="$udom:$uname:$courseid";
4053: &devalidate_cache_new('getgroups',$hashid);
4054: }
4055:
4056: # ------------------------------------------------------------------ Plain Text
4057:
4058: sub plaintext {
4059: my $short=shift;
4060: return &Apache::lonlocal::mt($prp{$short});
4061: }
4062:
4063: # ----------------------------------------------------------------- Assign Role
4064:
4065: sub assignrole {
4066: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
4067: my $mrole;
4068: if ($role =~ /^cr\//) {
4069: my $cwosec=$url;
4070: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4071: unless (&allowed('ccr',$cwosec)) {
4072: &logthis('Refused custom assignrole: '.
4073: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4074: $env{'user.name'}.' at '.$env{'user.domain'});
4075: return 'refused';
4076: }
4077: $mrole='cr';
4078: } elsif ($role =~ /^gr\//) {
4079: my $cwogrp=$url;
4080: $cwogrp=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4081: unless (&allowed('mdg',$cwogrp)) {
4082: &logthis('Refused group assignrole: '.
4083: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4084: $env{'user.name'}.' at '.$env{'user.domain'});
4085: return 'refused';
4086: }
4087: $mrole='gr';
4088: } else {
4089: my $cwosec=$url;
4090: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4091: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
4092: &logthis('Refused assignrole: '.
4093: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4094: $env{'user.name'}.' at '.$env{'user.domain'});
4095: return 'refused';
4096: }
4097: $mrole=$role;
4098: }
4099: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4100: "$udom:$uname:$url".'_'."$mrole=$role";
4101: if ($end) { $command.='_'.$end; }
4102: if ($start) {
4103: if ($end) {
4104: $command.='_'.$start;
4105: } else {
4106: $command.='_0_'.$start;
4107: }
4108: }
4109: # actually delete
4110: if ($deleteflag) {
4111: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
4112: # modify command to delete the role
4113: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
4114: "$udom:$uname:$url".'_'."$mrole";
4115: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
4116: # set start and finish to negative values for userrolelog
4117: $start=-1;
4118: $end=-1;
4119: }
4120: }
4121: # send command
4122: my $answer=&reply($command,&homeserver($uname,$udom));
4123: # log new user role if status is ok
4124: if ($answer eq 'ok') {
4125: &userrolelog($role,$uname,$udom,$url,$start,$end);
4126: }
4127: return $answer;
4128: }
4129:
4130: # -------------------------------------------------- Modify user authentication
4131: # Overrides without validation
4132:
4133: sub modifyuserauth {
4134: my ($udom,$uname,$umode,$upass)=@_;
4135: my $uhome=&homeserver($uname,$udom);
4136: unless (&allowed('mau',$udom)) { return 'refused'; }
4137: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
4138: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4139: ' in domain '.$env{'request.role.domain'});
4140: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
4141: &escape($upass),$uhome);
4142: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
4143: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
4144: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4145: &log($udom,,$uname,$uhome,
4146: 'Authentication changed by '.$env{'user.domain'}.', '.
4147: $env{'user.name'}.', '.$umode.
4148: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4149: unless ($reply eq 'ok') {
4150: &logthis('Authentication mode error: '.$reply);
4151: return 'error: '.$reply;
4152: }
4153: return 'ok';
4154: }
4155:
4156: # --------------------------------------------------------------- Modify a user
4157:
4158: sub modifyuser {
4159: my ($udom, $uname, $uid,
4160: $umode, $upass, $first,
4161: $middle, $last, $gene,
4162: $forceid, $desiredhome, $email)=@_;
4163: $udom=~s/\W//g;
4164: $uname=~s/\W//g;
4165: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
4166: $umode.', '.$first.', '.$middle.', '.
4167: $last.', '.$gene.'(forceid: '.$forceid.')'.
4168: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
4169: ' desiredhome not specified').
4170: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4171: ' in domain '.$env{'request.role.domain'});
4172: my $uhome=&homeserver($uname,$udom,'true');
4173: # ----------------------------------------------------------------- Create User
4174: if (($uhome eq 'no_host') &&
4175: (($umode && $upass) || ($umode eq 'localauth'))) {
4176: my $unhome='';
4177: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
4178: $unhome = $desiredhome;
4179: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
4180: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
4181: } else { # load balancing routine for determining $unhome
4182: my $tryserver;
4183: my $loadm=10000000;
4184: foreach $tryserver (keys %libserv) {
4185: if ($hostdom{$tryserver} eq $udom) {
4186: my $answer=reply('load',$tryserver);
4187: if (($answer=~/\d+/) && ($answer<$loadm)) {
4188: $loadm=$answer;
4189: $unhome=$tryserver;
4190: }
4191: }
4192: }
4193: }
4194: if (($unhome eq '') || ($unhome eq 'no_host')) {
4195: return 'error: unable to find a home server for '.$uname.
4196: ' in domain '.$udom;
4197: }
4198: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
4199: &escape($upass),$unhome);
4200: unless ($reply eq 'ok') {
4201: return 'error: '.$reply;
4202: }
4203: $uhome=&homeserver($uname,$udom,'true');
4204: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
4205: return 'error: unable verify users home machine.';
4206: }
4207: } # End of creation of new user
4208: # ---------------------------------------------------------------------- Add ID
4209: if ($uid) {
4210: $uid=~tr/A-Z/a-z/;
4211: my %uidhash=&idrget($udom,$uname);
4212: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
4213: && (!$forceid)) {
4214: unless ($uid eq $uidhash{$uname}) {
4215: return 'error: user id "'.$uid.'" does not match '.
4216: 'current user id "'.$uidhash{$uname}.'".';
4217: }
4218: } else {
4219: &idput($udom,($uname => $uid));
4220: }
4221: }
4222: # -------------------------------------------------------------- Add names, etc
4223: my @tmp=&get('environment',
4224: ['firstname','middlename','lastname','generation'],
4225: $udom,$uname);
4226: my %names;
4227: if ($tmp[0] =~ m/^error:.*/) {
4228: %names=();
4229: } else {
4230: %names = @tmp;
4231: }
4232: #
4233: # Make sure to not trash student environment if instructor does not bother
4234: # to supply name and email information
4235: #
4236: if ($first) { $names{'firstname'} = $first; }
4237: if (defined($middle)) { $names{'middlename'} = $middle; }
4238: if ($last) { $names{'lastname'} = $last; }
4239: if (defined($gene)) { $names{'generation'} = $gene; }
4240: if ($email) {
4241: $email=~s/[^\w\@\.\-\,]//gs;
4242: if ($email=~/\@/) { $names{'notification'} = $email;
4243: $names{'critnotification'} = $email;
4244: $names{'permanentemail'} = $email; }
4245: }
4246: my $reply = &put('environment', \%names, $udom,$uname);
4247: if ($reply ne 'ok') { return 'error: '.$reply; }
4248: &devalidate_cache_new('namescache',$uname.':'.$udom);
4249: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
4250: $umode.', '.$first.', '.$middle.', '.
4251: $last.', '.$gene.' by '.
4252: $env{'user.name'}.' at '.$env{'user.domain'});
4253: return 'ok';
4254: }
4255:
4256: # -------------------------------------------------------------- Modify student
4257:
4258: sub modifystudent {
4259: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
4260: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
4261: if (!$cid) {
4262: unless ($cid=$env{'request.course.id'}) {
4263: return 'not_in_class';
4264: }
4265: }
4266: # --------------------------------------------------------------- Make the user
4267: my $reply=&modifyuser
4268: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
4269: $desiredhome,$email);
4270: unless ($reply eq 'ok') { return $reply; }
4271: # This will cause &modify_student_enrollment to get the uid from the
4272: # students environment
4273: $uid = undef if (!$forceid);
4274: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
4275: $gene,$usec,$end,$start,$type,$locktype,$cid);
4276: return $reply;
4277: }
4278:
4279: sub modify_student_enrollment {
4280: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
4281: my ($cdom,$cnum,$chome);
4282: if (!$cid) {
4283: unless ($cid=$env{'request.course.id'}) {
4284: return 'not_in_class';
4285: }
4286: $cdom=$env{'course.'.$cid.'.domain'};
4287: $cnum=$env{'course.'.$cid.'.num'};
4288: } else {
4289: ($cdom,$cnum)=split(/_/,$cid);
4290: }
4291: $chome=$env{'course.'.$cid.'.home'};
4292: if (!$chome) {
4293: $chome=&homeserver($cnum,$cdom);
4294: }
4295: if (!$chome) { return 'unknown_course'; }
4296: # Make sure the user exists
4297: my $uhome=&homeserver($uname,$udom);
4298: if (($uhome eq '') || ($uhome eq 'no_host')) {
4299: return 'error: no such user';
4300: }
4301: # Get student data if we were not given enough information
4302: if (!defined($first) || $first eq '' ||
4303: !defined($last) || $last eq '' ||
4304: !defined($uid) || $uid eq '' ||
4305: !defined($middle) || $middle eq '' ||
4306: !defined($gene) || $gene eq '') {
4307: # They did not supply us with enough data to enroll the student, so
4308: # we need to pick up more information.
4309: my %tmp = &get('environment',
4310: ['firstname','middlename','lastname', 'generation','id']
4311: ,$udom,$uname);
4312:
4313: #foreach (keys(%tmp)) {
4314: # &logthis("key $_ = ".$tmp{$_});
4315: #}
4316: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
4317: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
4318: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
4319: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
4320: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
4321: }
4322: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
4323: my $reply=cput('classlist',
4324: {"$uname:$udom" =>
4325: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
4326: $cdom,$cnum);
4327: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
4328: return 'error: '.$reply;
4329: } else {
4330: &devalidate_getsection_cache($udom,$uname,$cid);
4331: }
4332: # Add student role to user
4333: my $uurl='/'.$cid;
4334: $uurl=~s/\_/\//g;
4335: if ($usec) {
4336: $uurl.='/'.$usec;
4337: }
4338: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
4339: }
4340:
4341: sub format_name {
4342: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
4343: my $name;
4344: if ($first ne 'lastname') {
4345: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
4346: } else {
4347: if ($lastname=~/\S/) {
4348: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
4349: $name=~s/\s+,/,/;
4350: } else {
4351: $name.= $firstname.' '.$middlename.' '.$generation;
4352: }
4353: }
4354: $name=~s/^\s+//;
4355: $name=~s/\s+$//;
4356: $name=~s/\s+/ /g;
4357: return $name;
4358: }
4359:
4360: # ------------------------------------------------- Write to course preferences
4361:
4362: sub writecoursepref {
4363: my ($courseid,%prefs)=@_;
4364: $courseid=~s/^\///;
4365: $courseid=~s/\_/\//g;
4366: my ($cdomain,$cnum)=split(/\//,$courseid);
4367: my $chome=homeserver($cnum,$cdomain);
4368: if (($chome eq '') || ($chome eq 'no_host')) {
4369: return 'error: no such course';
4370: }
4371: my $cstring='';
4372: foreach (keys %prefs) {
4373: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
4374: }
4375: $cstring=~s/\&$//;
4376: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
4377: }
4378:
4379: # ---------------------------------------------------------- Make/modify course
4380:
4381: sub createcourse {
4382: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_;
4383: $url=&declutter($url);
4384: my $cid='';
4385: unless (&allowed('ccc',$udom)) {
4386: return 'refused';
4387: }
4388: # ------------------------------------------------------------------- Create ID
4389: my $uname=int(1+rand(9)).
4390: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
4391: substr($$.time,0,5).unpack("H8",pack("I32",time)).
4392: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4393: # ----------------------------------------------- Make sure that does not exist
4394: my $uhome=&homeserver($uname,$udom,'true');
4395: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4396: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
4397: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4398: $uhome=&homeserver($uname,$udom,'true');
4399: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4400: return 'error: unable to generate unique course-ID';
4401: }
4402: }
4403: # ------------------------------------------------ Check supplied server name
4404: $course_server = $env{'user.homeserver'} if (! defined($course_server));
4405: if (! exists($libserv{$course_server})) {
4406: return 'error:bad server name '.$course_server;
4407: }
4408: # ------------------------------------------------------------- Make the course
4409: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
4410: $course_server);
4411: unless ($reply eq 'ok') { return 'error: '.$reply; }
4412: $uhome=&homeserver($uname,$udom,'true');
4413: if (($uhome eq '') || ($uhome eq 'no_host')) {
4414: return 'error: no such course';
4415: }
4416: # ----------------------------------------------------------------- Course made
4417: # log existence
4418: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
4419: ':'.&escape($inst_code).':'.&escape($course_owner),$uhome);
4420: &flushcourselogs();
4421: # set toplevel url
4422: my $topurl=$url;
4423: unless ($nonstandard) {
4424: # ------------------------------------------ For standard courses, make top url
4425: my $mapurl=&clutter($url);
4426: if ($mapurl eq '/res/') { $mapurl=''; }
4427: $env{'form.initmap'}=(<<ENDINITMAP);
4428: <map>
4429: <resource id="1" type="start"></resource>
4430: <resource id="2" src="$mapurl"></resource>
4431: <resource id="3" type="finish"></resource>
4432: <link index="1" from="1" to="2"></link>
4433: <link index="2" from="2" to="3"></link>
4434: </map>
4435: ENDINITMAP
4436: $topurl=&declutter(
4437: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
4438: );
4439: }
4440: # ----------------------------------------------------------- Write preferences
4441: &writecoursepref($udom.'_'.$uname,
4442: ('description' => $description,
4443: 'url' => $topurl));
4444: return '/'.$udom.'/'.$uname;
4445: }
4446:
4447: # ---------------------------------------------------------- Assign Custom Role
4448:
4449: sub assigncustomrole {
4450: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
4451: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
4452: $end,$start,$deleteflag);
4453: }
4454:
4455: # ----------------------------------------------------------------- Revoke Role
4456:
4457: sub revokerole {
4458: my ($udom,$uname,$url,$role,$deleteflag)=@_;
4459: my $now=time;
4460: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
4461: }
4462:
4463: # ---------------------------------------------------------- Revoke Custom Role
4464:
4465: sub revokecustomrole {
4466: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
4467: my $now=time;
4468: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
4469: $deleteflag);
4470: }
4471:
4472: # ------------------------------------------------------------ Disk usage
4473: sub diskusage {
4474: my ($udom,$uname,$directoryRoot)=@_;
4475: $directoryRoot =~ s/\/$//;
4476: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
4477: return $listing;
4478: }
4479:
4480: sub is_locked {
4481: my ($file_name, $domain, $user) = @_;
4482: my @check;
4483: my $is_locked;
4484: push @check, $file_name;
4485: my %locked = &get('file_permissions',\@check,
4486: $env{'user.domain'},$env{'user.name'});
4487: my ($tmp)=keys(%locked);
4488: if ($tmp=~/^error:/) { undef(%locked); }
4489:
4490: if (ref($locked{$file_name}) eq 'ARRAY') {
4491: $is_locked = 'true';
4492: } else {
4493: $is_locked = 'false';
4494: }
4495: }
4496:
4497: # ------------------------------------------------------------- Mark as Read Only
4498:
4499: sub mark_as_readonly {
4500: my ($domain,$user,$files,$what) = @_;
4501: my %current_permissions = &dump('file_permissions',$domain,$user);
4502: my ($tmp)=keys(%current_permissions);
4503: if ($tmp=~/^error:/) { undef(%current_permissions); }
4504: foreach my $file (@{$files}) {
4505: push(@{$current_permissions{$file}},$what);
4506: }
4507: &put('file_permissions',\%current_permissions,$domain,$user);
4508: return;
4509: }
4510:
4511: # ------------------------------------------------------------Save Selected Files
4512:
4513: sub save_selected_files {
4514: my ($user, $path, @files) = @_;
4515: my $filename = $user."savedfiles";
4516: my @other_files = &files_not_in_path($user, $path);
4517: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4518: foreach my $file (@files) {
4519: print (OUT $env{'form.currentpath'}.$file."\n");
4520: }
4521: foreach my $file (@other_files) {
4522: print (OUT $file."\n");
4523: }
4524: close (OUT);
4525: return 'ok';
4526: }
4527:
4528: sub clear_selected_files {
4529: my ($user) = @_;
4530: my $filename = $user."savedfiles";
4531: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4532: print (OUT undef);
4533: close (OUT);
4534: return ("ok");
4535: }
4536:
4537: sub files_in_path {
4538: my ($user, $path) = @_;
4539: my $filename = $user."savedfiles";
4540: my %return_files;
4541: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4542: while (my $line_in = <IN>) {
4543: chomp ($line_in);
4544: my @paths_and_file = split (m!/!, $line_in);
4545: my $file_part = pop (@paths_and_file);
4546: my $path_part = join ('/', @paths_and_file);
4547: $path_part.='/';
4548: my $path_and_file = $path_part.$file_part;
4549: if ($path_part eq $path) {
4550: $return_files{$file_part}= 'selected';
4551: }
4552: }
4553: close (IN);
4554: return (\%return_files);
4555: }
4556:
4557: # called in portfolio select mode, to show files selected NOT in current directory
4558: sub files_not_in_path {
4559: my ($user, $path) = @_;
4560: my $filename = $user."savedfiles";
4561: my @return_files;
4562: my $path_part;
4563: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4564: while (<IN>) {
4565: #ok, I know it's clunky, but I want it to work
4566: my @paths_and_file = split m!/!, $_;
4567: my $file_part = pop (@paths_and_file);
4568: chomp ($file_part);
4569: my $path_part = join ('/', @paths_and_file);
4570: $path_part .= '/';
4571: my $path_and_file = $path_part.$file_part;
4572: if ($path_part ne $path) {
4573: push (@return_files, ($path_and_file));
4574: }
4575: }
4576: close (OUT);
4577: return (@return_files);
4578: }
4579:
4580: #--------------------------------------------------------------Get Marked as Read Only
4581:
4582:
4583: sub get_marked_as_readonly {
4584: my ($domain,$user,$what) = @_;
4585: my %current_permissions = &dump('file_permissions',$domain,$user);
4586: my ($tmp)=keys(%current_permissions);
4587: if ($tmp=~/^error:/) { undef(%current_permissions); }
4588: my @readonly_files;
4589: my $cmp1=$what;
4590: if (ref($what)) { $cmp1=join('',@{$what}) };
4591: while (my ($file_name,$value) = each(%current_permissions)) {
4592: if (ref($value) eq "ARRAY"){
4593: foreach my $stored_what (@{$value}) {
4594: my $cmp2=$stored_what;
4595: if (ref($stored_what)) { $cmp2=join('',@{$stored_what}) };
4596: if ($cmp1 eq $cmp2) {
4597: push(@readonly_files, $file_name);
4598: } elsif (!defined($what)) {
4599: push(@readonly_files, $file_name);
4600: }
4601: }
4602: }
4603: }
4604: return @readonly_files;
4605: }
4606: #-----------------------------------------------------------Get Marked as Read Only Hash
4607:
4608: sub get_marked_as_readonly_hash {
4609: my ($domain,$user,$what) = @_;
4610: my %current_permissions = &dump('file_permissions',$domain,$user);
4611: my ($tmp)=keys(%current_permissions);
4612: if ($tmp=~/^error:/) { undef(%current_permissions); }
4613:
4614: my %readonly_files;
4615: while (my ($file_name,$value) = each(%current_permissions)) {
4616: if (ref($value) eq "ARRAY"){
4617: foreach my $stored_what (@{$value}) {
4618: if ($stored_what eq $what) {
4619: $readonly_files{$file_name} = 'locked';
4620: } elsif (!defined($what)) {
4621: $readonly_files{$file_name} = 'locked';
4622: }
4623: }
4624: }
4625: }
4626: return %readonly_files;
4627: }
4628: # ------------------------------------------------------------ Unmark as Read Only
4629:
4630: sub unmark_as_readonly {
4631: # unmarks $file_name (if $file_name is defined), or all files locked by $what
4632: # for portfolio submissions, $what contains [$symb,$crsid]
4633: my ($domain,$user,$what,$file_name) = @_;
4634: my $symb_crs = $what;
4635: if (ref($what)) { $symb_crs=join('',@$what); }
4636: my %current_permissions = &dump('file_permissions',$domain,$user);
4637: my ($tmp)=keys(%current_permissions);
4638: if ($tmp=~/^error:/) { undef(%current_permissions); }
4639: my @readonly_files = &get_marked_as_readonly($domain,$user,$what);
4640: foreach my $file (@readonly_files) {
4641: if (defined($file_name) && ($file_name ne $file)) { next; }
4642: my $current_locks = $current_permissions{$file};
4643: my @new_locks;
4644: my @del_keys;
4645: if (ref($current_locks) eq "ARRAY"){
4646: foreach my $locker (@{$current_locks}) {
4647: my $compare=$locker;
4648: if (ref($locker)) { $compare=join('',@{$locker}) };
4649: if ($compare ne $symb_crs) {
4650: push(@new_locks, $locker);
4651: }
4652: }
4653: if (scalar(@new_locks) > 0) {
4654: $current_permissions{$file} = \@new_locks;
4655: } else {
4656: push(@del_keys, $file);
4657: &del('file_permissions',\@del_keys, $domain, $user);
4658: delete($current_permissions{$file});
4659: }
4660: }
4661: }
4662: &put('file_permissions',\%current_permissions,$domain,$user);
4663: return;
4664: }
4665:
4666: # ------------------------------------------------------------ Directory lister
4667:
4668: sub dirlist {
4669: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
4670:
4671: $uri=~s/^\///;
4672: $uri=~s/\/$//;
4673: my ($udom, $uname);
4674: (undef,$udom,$uname)=split(/\//,$uri);
4675: if(defined($userdomain)) {
4676: $udom = $userdomain;
4677: }
4678: if(defined($username)) {
4679: $uname = $username;
4680: }
4681:
4682: my $dirRoot = $perlvar{'lonDocRoot'};
4683: if(defined($alternateDirectoryRoot)) {
4684: $dirRoot = $alternateDirectoryRoot;
4685: $dirRoot =~ s/\/$//;
4686: }
4687:
4688: if($udom) {
4689: if($uname) {
4690: my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
4691: homeserver($uname,$udom));
4692: my @listing_results;
4693: if ($listing eq 'unknown_cmd') {
4694: $listing=reply('ls:'.$dirRoot.'/'.$uri,
4695: homeserver($uname,$udom));
4696: @listing_results = split(/:/,$listing);
4697: } else {
4698: @listing_results = map { &unescape($_); } split(/:/,$listing);
4699: }
4700: return @listing_results;
4701: } elsif(!defined($alternateDirectoryRoot)) {
4702: my $tryserver;
4703: my %allusers=();
4704: foreach $tryserver (keys %libserv) {
4705: if($hostdom{$tryserver} eq $udom) {
4706: my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
4707: $udom, $tryserver);
4708: my @listing_results;
4709: if ($listing eq 'unknown_cmd') {
4710: $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
4711: $udom, $tryserver);
4712: @listing_results = split(/:/,$listing);
4713: } else {
4714: @listing_results =
4715: map { &unescape($_); } split(/:/,$listing);
4716: }
4717: if ($listing_results[0] ne 'no_such_dir' &&
4718: $listing_results[0] ne 'empty' &&
4719: $listing_results[0] ne 'con_lost') {
4720: foreach (@listing_results) {
4721: my ($entry,@stat)=split(/&/,$_);
4722: $allusers{$entry}=1;
4723: }
4724: }
4725: }
4726: }
4727: my $alluserstr='';
4728: foreach (sort keys %allusers) {
4729: $alluserstr.=$_.'&user:';
4730: }
4731: $alluserstr=~s/:$//;
4732: return split(/:/,$alluserstr);
4733: } else {
4734: my @emptyResults = ();
4735: push(@emptyResults, 'missing user name');
4736: return split(':',@emptyResults);
4737: }
4738: } elsif(!defined($alternateDirectoryRoot)) {
4739: my $tryserver;
4740: my %alldom=();
4741: foreach $tryserver (keys %libserv) {
4742: $alldom{$hostdom{$tryserver}}=1;
4743: }
4744: my $alldomstr='';
4745: foreach (sort keys %alldom) {
4746: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
4747: }
4748: $alldomstr=~s/:$//;
4749: return split(/:/,$alldomstr);
4750: } else {
4751: my @emptyResults = ();
4752: push(@emptyResults, 'missing domain');
4753: return split(':',@emptyResults);
4754: }
4755: }
4756:
4757: # --------------------------------------------- GetFileTimestamp
4758: # This function utilizes dirlist and returns the date stamp for
4759: # when it was last modified. It will also return an error of -1
4760: # if an error occurs
4761:
4762: ##
4763: ## FIXME: This subroutine assumes its caller knows something about the
4764: ## directory structure of the home server for the student ($root).
4765: ## Not a good assumption to make. Since this is for looking up files
4766: ## in user directories, the full path should be constructed by lond, not
4767: ## whatever machine we request data from.
4768: ##
4769: sub GetFileTimestamp {
4770: my ($studentDomain,$studentName,$filename,$root)=@_;
4771: $studentDomain=~s/\W//g;
4772: $studentName=~s/\W//g;
4773: my $subdir=$studentName.'__';
4774: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4775: my $proname="$studentDomain/$subdir/$studentName";
4776: $proname .= '/'.$filename;
4777: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
4778: $studentName, $root);
4779: my @stats = split('&', $fileStat);
4780: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4781: # @stats contains first the filename, then the stat output
4782: return $stats[10]; # so this is 10 instead of 9.
4783: } else {
4784: return -1;
4785: }
4786: }
4787:
4788: sub stat_file {
4789: my ($uri) = @_;
4790: $uri = &clutter($uri);
4791:
4792: # we want just the url part without the unneeded accessor url bits
4793: if ($uri =~ m-^/adm/-) {
4794: $uri=~s-^/adm/wrapper/-/-;
4795: $uri=~s-^/adm/coursedocs/showdoc/-/-;
4796: }
4797: my ($udom,$uname,$file,$dir);
4798: if ($uri =~ m-^/(uploaded|editupload)/-) {
4799: ($udom,$uname,$file) =
4800: ($uri =~ m-/(?:uploaded|editupload)/?([^/]*)/?([^/]*)/?(.*)-);
4801: $file = 'userfiles/'.$file;
4802: $dir = &Apache::loncommon::propath($udom,$uname);
4803: }
4804: if ($uri =~ m-^/res/-) {
4805: ($udom,$uname) =
4806: ($uri =~ m-/(?:res)/?([^/]*)/?([^/]*)/-);
4807: $file = $uri;
4808: }
4809:
4810: if (!$udom || !$uname || !$file) {
4811: # unable to handle the uri
4812: return ();
4813: }
4814:
4815: my ($result) = &dirlist($file,$udom,$uname,$dir);
4816: my @stats = split('&', $result);
4817:
4818: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4819: shift(@stats); #filename is first
4820: return @stats;
4821: }
4822: return ();
4823: }
4824:
4825: # -------------------------------------------------------- Value of a Condition
4826:
4827: # gets the value of a specific preevaluated condition
4828: # stored in the string $env{user.state.<cid>}
4829: # or looks up a condition reference in the bighash and if if hasn't
4830: # already been evaluated recurses into docondval to get the value of
4831: # the condition, then memoizing it to
4832: # $env{user.state.<cid>.<condition>}
4833: sub directcondval {
4834: my $number=shift;
4835: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
4836: &Apache::lonuserstate::evalstate();
4837: }
4838: if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
4839: return $env{'user.state.'.$env{'request.course.id'}.".$number"};
4840: } elsif ($number =~ /^_/) {
4841: my $sub_condition;
4842: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4843: &GDBM_READER(),0640)) {
4844: $sub_condition=$bighash{'conditions'.$number};
4845: untie(%bighash);
4846: }
4847: my $value = &docondval($sub_condition);
4848: &appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
4849: return $value;
4850: }
4851: if ($env{'user.state.'.$env{'request.course.id'}}) {
4852: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
4853: } else {
4854: return 2;
4855: }
4856: }
4857:
4858: # get the collection of conditions for this resource
4859: sub condval {
4860: my $condidx=shift;
4861: my $allpathcond='';
4862: foreach my $cond (split(/\|/,$condidx)) {
4863: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
4864: $allpathcond.=
4865: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
4866: }
4867: }
4868: $allpathcond=~s/\|$//;
4869: return &docondval($allpathcond);
4870: }
4871:
4872: #evaluates an expression of conditions
4873: sub docondval {
4874: my ($allpathcond) = @_;
4875: my $result=0;
4876: if ($env{'request.course.id'}
4877: && defined($allpathcond)) {
4878: my $operand='|';
4879: my @stack;
4880: foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
4881: if ($chunk eq '(') {
4882: push @stack,($operand,$result);
4883: } elsif ($chunk eq ')') {
4884: my $before=pop @stack;
4885: if (pop @stack eq '&') {
4886: $result=$result>$before?$before:$result;
4887: } else {
4888: $result=$result>$before?$result:$before;
4889: }
4890: } elsif (($chunk eq '&') || ($chunk eq '|')) {
4891: $operand=$chunk;
4892: } else {
4893: my $new=directcondval($chunk);
4894: if ($operand eq '&') {
4895: $result=$result>$new?$new:$result;
4896: } else {
4897: $result=$result>$new?$result:$new;
4898: }
4899: }
4900: }
4901: }
4902: return $result;
4903: }
4904:
4905: # ---------------------------------------------------- Devalidate courseresdata
4906:
4907: sub devalidatecourseresdata {
4908: my ($coursenum,$coursedomain)=@_;
4909: my $hashid=$coursenum.':'.$coursedomain;
4910: &devalidate_cache_new('courseres',$hashid);
4911: }
4912:
4913: # --------------------------------------------------- Course Resourcedata Query
4914:
4915: sub get_courseresdata {
4916: my ($coursenum,$coursedomain)=@_;
4917: my $coursehom=&homeserver($coursenum,$coursedomain);
4918: my $hashid=$coursenum.':'.$coursedomain;
4919: my ($result,$cached)=&is_cached_new('courseres',$hashid);
4920: my %dumpreply;
4921: unless (defined($cached)) {
4922: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
4923: $result=\%dumpreply;
4924: my ($tmp) = keys(%dumpreply);
4925: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
4926: &do_cache_new('courseres',$hashid,$result,600);
4927: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4928: return $tmp;
4929: } elsif ($tmp =~ /^(error)/) {
4930: $result=undef;
4931: &do_cache_new('courseres',$hashid,$result,600);
4932: }
4933: }
4934: return $result;
4935: }
4936:
4937: sub devalidateuserresdata {
4938: my ($uname,$udom)=@_;
4939: my $hashid="$udom:$uname";
4940: &devalidate_cache_new('userres',$hashid);
4941: }
4942:
4943: sub get_userresdata {
4944: my ($uname,$udom)=@_;
4945: #most student don\'t have any data set, check if there is some data
4946: if (&EXT_cache_status($udom,$uname)) { return undef; }
4947:
4948: my $hashid="$udom:$uname";
4949: my ($result,$cached)=&is_cached_new('userres',$hashid);
4950: if (!defined($cached)) {
4951: my %resourcedata=&dump('resourcedata',$udom,$uname);
4952: $result=\%resourcedata;
4953: &do_cache_new('userres',$hashid,$result,600);
4954: }
4955: my ($tmp)=keys(%$result);
4956: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4957: return $result;
4958: }
4959: #error 2 occurs when the .db doesn't exist
4960: if ($tmp!~/error: 2 /) {
4961: &logthis("<font color=\"blue\">WARNING:".
4962: " Trying to get resource data for ".
4963: $uname." at ".$udom.": ".
4964: $tmp."</font>");
4965: } elsif ($tmp=~/error: 2 /) {
4966: #&EXT_cache_set($udom,$uname);
4967: &do_cache_new('userres',$hashid,undef,600);
4968: undef($tmp); # not really an error so don't send it back
4969: }
4970: return $tmp;
4971: }
4972:
4973: sub resdata {
4974: my ($name,$domain,$type,@which)=@_;
4975: my $result;
4976: if ($type eq 'course') {
4977: $result=&get_courseresdata($name,$domain);
4978: } elsif ($type eq 'user') {
4979: $result=&get_userresdata($name,$domain);
4980: }
4981: if (!ref($result)) { return $result; }
4982: foreach my $item (@which) {
4983: if (defined($result->{$item})) {
4984: return $result->{$item};
4985: }
4986: }
4987: return undef;
4988: }
4989:
4990: #
4991: # EXT resource caching routines
4992: #
4993:
4994: sub clear_EXT_cache_status {
4995: &delenv('cache.EXT.');
4996: }
4997:
4998: sub EXT_cache_status {
4999: my ($target_domain,$target_user) = @_;
5000: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5001: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
5002: # We know already the user has no data
5003: return 1;
5004: } else {
5005: return 0;
5006: }
5007: }
5008:
5009: sub EXT_cache_set {
5010: my ($target_domain,$target_user) = @_;
5011: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5012: #&appenv($cachename => time);
5013: }
5014:
5015: # --------------------------------------------------------- Value of a Variable
5016: sub EXT {
5017:
5018: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
5019: unless ($varname) { return ''; }
5020: #get real user name/domain, courseid and symb
5021: my $courseid;
5022: my $publicuser;
5023: if ($symbparm) {
5024: $symbparm=&get_symb_from_alias($symbparm);
5025: }
5026: if (!($uname && $udom)) {
5027: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
5028: &Apache::lonxml::whichuser($symbparm);
5029: if (!$symbparm) { $symbparm=$cursymb; }
5030: } else {
5031: $courseid=$env{'request.course.id'};
5032: }
5033: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
5034: my $rest;
5035: if (defined($therest[0])) {
5036: $rest=join('.',@therest);
5037: } else {
5038: $rest='';
5039: }
5040:
5041: my $qualifierrest=$qualifier;
5042: if ($rest) { $qualifierrest.='.'.$rest; }
5043: my $spacequalifierrest=$space;
5044: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
5045: if ($realm eq 'user') {
5046: # --------------------------------------------------------------- user.resource
5047: if ($space eq 'resource') {
5048: if ( (defined($Apache::lonhomework::parsing_a_problem)
5049: || defined($Apache::lonhomework::parsing_a_task))
5050: &&
5051: ($symbparm eq &symbread()) ) {
5052: return $Apache::lonhomework::history{$qualifierrest};
5053: } else {
5054: my %restored;
5055: if ($publicuser || $env{'request.state'} eq 'construct') {
5056: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
5057: } else {
5058: %restored=&restore($symbparm,$courseid,$udom,$uname);
5059: }
5060: return $restored{$qualifierrest};
5061: }
5062: # ----------------------------------------------------------------- user.access
5063: } elsif ($space eq 'access') {
5064: # FIXME - not supporting calls for a specific user
5065: return &allowed($qualifier,$rest);
5066: # ------------------------------------------ user.preferences, user.environment
5067: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
5068: if (($uname eq $env{'user.name'}) &&
5069: ($udom eq $env{'user.domain'})) {
5070: return $env{join('.',('environment',$qualifierrest))};
5071: } else {
5072: my %returnhash;
5073: if (!$publicuser) {
5074: %returnhash=&userenvironment($udom,$uname,
5075: $qualifierrest);
5076: }
5077: return $returnhash{$qualifierrest};
5078: }
5079: # ----------------------------------------------------------------- user.course
5080: } elsif ($space eq 'course') {
5081: # FIXME - not supporting calls for a specific user
5082: return $env{join('.',('request.course',$qualifier))};
5083: # ------------------------------------------------------------------- user.role
5084: } elsif ($space eq 'role') {
5085: # FIXME - not supporting calls for a specific user
5086: my ($role,$where)=split(/\./,$env{'request.role'});
5087: if ($qualifier eq 'value') {
5088: return $role;
5089: } elsif ($qualifier eq 'extent') {
5090: return $where;
5091: }
5092: # ----------------------------------------------------------------- user.domain
5093: } elsif ($space eq 'domain') {
5094: return $udom;
5095: # ------------------------------------------------------------------- user.name
5096: } elsif ($space eq 'name') {
5097: return $uname;
5098: # ---------------------------------------------------- Any other user namespace
5099: } else {
5100: my %reply;
5101: if (!$publicuser) {
5102: %reply=&get($space,[$qualifierrest],$udom,$uname);
5103: }
5104: return $reply{$qualifierrest};
5105: }
5106: } elsif ($realm eq 'query') {
5107: # ---------------------------------------------- pull stuff out of query string
5108: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
5109: [$spacequalifierrest]);
5110: return $env{'form.'.$spacequalifierrest};
5111: } elsif ($realm eq 'request') {
5112: # ------------------------------------------------------------- request.browser
5113: if ($space eq 'browser') {
5114: if ($qualifier eq 'textremote') {
5115: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
5116: return 1;
5117: } else {
5118: return 0;
5119: }
5120: } else {
5121: return $env{'browser.'.$qualifier};
5122: }
5123: # ------------------------------------------------------------ request.filename
5124: } else {
5125: return $env{'request.'.$spacequalifierrest};
5126: }
5127: } elsif ($realm eq 'course') {
5128: # ---------------------------------------------------------- course.description
5129: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
5130: } elsif ($realm eq 'resource') {
5131:
5132: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
5133: if (!$symbparm) { $symbparm=&symbread(); }
5134: }
5135:
5136: if ($space eq 'title') {
5137: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
5138: return &gettitle($symbparm);
5139: }
5140:
5141: if ($space eq 'map') {
5142: my ($map) = &decode_symb($symbparm);
5143: return &symbread($map);
5144: }
5145:
5146: my ($section, $group, @groups);
5147: my ($courselevelm,$courselevel);
5148: if ($symbparm && defined($courseid) &&
5149: $courseid eq $env{'request.course.id'}) {
5150:
5151: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
5152:
5153: # ----------------------------------------------------- Cascading lookup scheme
5154: my $symbp=$symbparm;
5155: my $mapp=(&decode_symb($symbp))[0];
5156:
5157: my $symbparm=$symbp.'.'.$spacequalifierrest;
5158: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
5159:
5160: if (($env{'user.name'} eq $uname) &&
5161: ($env{'user.domain'} eq $udom)) {
5162: $section=$env{'request.course.sec'};
5163: @groups=&sort_course_groups($env{'request.course.groups'},$courseid);
5164: } else {
5165: if (! defined($usection)) {
5166: $section=&getsection($udom,$uname,$courseid);
5167: } else {
5168: $section = $usection;
5169: }
5170: my $grouplist = &get_users_groups($udom,$uname,$courseid);
5171: if ($grouplist) {
5172: @groups=&sort_course_groups($grouplist,$courseid);
5173: }
5174: }
5175:
5176: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
5177: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
5178: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
5179:
5180: $courselevel=$courseid.'.'.$spacequalifierrest;
5181: my $courselevelr=$courseid.'.'.$symbparm;
5182: $courselevelm=$courseid.'.'.$mapparm;
5183:
5184: # ----------------------------------------------------------- first, check user
5185:
5186: my $userreply=&resdata($uname,$udom,'user',
5187: ($courselevelr,$courselevelm,
5188: $courselevel));
5189: if (defined($userreply)) { return $userreply; }
5190:
5191: # ------------------------------------------------ second, check some of course
5192: my $coursereply;
5193: if (@groups > 0) {
5194: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
5195: $mapparm,$spacequalifierrest);
5196: if (defined($coursereply)) { return $coursereply; }
5197: }
5198:
5199: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
5200: $env{'course.'.$courseid.'.domain'},
5201: 'course',
5202: ($seclevelr,$seclevelm,$seclevel,
5203: $courselevelr));
5204: if (defined($coursereply)) { return $coursereply; }
5205:
5206: # ------------------------------------------------------ third, check map parms
5207: my %parmhash=();
5208: my $thisparm='';
5209: if (tie(%parmhash,'GDBM_File',
5210: $env{'request.course.fn'}.'_parms.db',
5211: &GDBM_READER(),0640)) {
5212: $thisparm=$parmhash{$symbparm};
5213: untie(%parmhash);
5214: }
5215: if ($thisparm) { return $thisparm; }
5216: }
5217: # ------------------------------------------ fourth, look in resource metadata
5218:
5219: $spacequalifierrest=~s/\./\_/;
5220: my $filename;
5221: if (!$symbparm) { $symbparm=&symbread(); }
5222: if ($symbparm) {
5223: $filename=(&decode_symb($symbparm))[2];
5224: } else {
5225: $filename=$env{'request.filename'};
5226: }
5227: my $metadata=&metadata($filename,$spacequalifierrest);
5228: if (defined($metadata)) { return $metadata; }
5229: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
5230: if (defined($metadata)) { return $metadata; }
5231:
5232: # ---------------------------------------------- fourth, look in rest pf course
5233: if ($symbparm && defined($courseid) &&
5234: $courseid eq $env{'request.course.id'}) {
5235: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
5236: $env{'course.'.$courseid.'.domain'},
5237: 'course',
5238: ($courselevelm,$courselevel));
5239: if (defined($coursereply)) { return $coursereply; }
5240: }
5241: # ------------------------------------------------------------------ Cascade up
5242: unless ($space eq '0') {
5243: my @parts=split(/_/,$space);
5244: my $id=pop(@parts);
5245: my $part=join('_',@parts);
5246: if ($part eq '') { $part='0'; }
5247: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
5248: $symbparm,$udom,$uname,$section,1);
5249: if (defined($partgeneral)) { return $partgeneral; }
5250: }
5251: if ($recurse) { return undef; }
5252: my $pack_def=&packages_tab_default($filename,$varname);
5253: if (defined($pack_def)) { return $pack_def; }
5254:
5255: # ---------------------------------------------------- Any other user namespace
5256: } elsif ($realm eq 'environment') {
5257: # ----------------------------------------------------------------- environment
5258: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
5259: return $env{'environment.'.$spacequalifierrest};
5260: } else {
5261: my %returnhash=&userenvironment($udom,$uname,
5262: $spacequalifierrest);
5263: return $returnhash{$spacequalifierrest};
5264: }
5265: } elsif ($realm eq 'system') {
5266: # ----------------------------------------------------------------- system.time
5267: if ($space eq 'time') {
5268: return time;
5269: }
5270: } elsif ($realm eq 'server') {
5271: # ----------------------------------------------------------------- system.time
5272: if ($space eq 'name') {
5273: return $ENV{'SERVER_NAME'};
5274: }
5275: }
5276: return '';
5277: }
5278:
5279: sub check_group_parms {
5280: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
5281: my @groupitems = ();
5282: my $resultitem;
5283: my @levels = ($symbparm,$mapparm,$what);
5284: foreach my $group (@{$groups}) {
5285: foreach my $level (@levels) {
5286: my $item = $courseid.'.['.$group.'].'.$level;
5287: push(@groupitems,$item);
5288: }
5289: }
5290: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
5291: $env{'course.'.$courseid.'.domain'},
5292: 'course',@groupitems);
5293: return $coursereply;
5294: }
5295:
5296: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
5297: my ($grouplist,$courseid) = @_;
5298: my @groups = sort(split(/:/,$grouplist));
5299: return @groups;
5300: }
5301:
5302: sub packages_tab_default {
5303: my ($uri,$varname)=@_;
5304: my (undef,$part,$name)=split(/\./,$varname);
5305: my $packages=&metadata($uri,'packages');
5306: foreach my $package (split(/,/,$packages)) {
5307: my ($pack_type,$pack_part)=split(/_/,$package,2);
5308: if (defined($packagetab{"$pack_type&$name&default"})) {
5309: return $packagetab{"$pack_type&$name&default"};
5310: }
5311: if ($pack_type eq 'part') { $pack_part='0'; }
5312: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
5313: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
5314: }
5315: }
5316: return undef;
5317: }
5318:
5319: sub add_prefix_and_part {
5320: my ($prefix,$part)=@_;
5321: my $keyroot;
5322: if (defined($prefix) && $prefix !~ /^__/) {
5323: # prefix that has a part already
5324: $keyroot=$prefix;
5325: } elsif (defined($prefix)) {
5326: # prefix that is missing a part
5327: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
5328: } else {
5329: # no prefix at all
5330: if (defined($part)) { $keyroot='_'.$part; }
5331: }
5332: return $keyroot;
5333: }
5334:
5335: # ---------------------------------------------------------------- Get metadata
5336:
5337: my %metaentry;
5338: sub metadata {
5339: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
5340: $uri=&declutter($uri);
5341: # if it is a non metadata possible uri return quickly
5342: if (($uri eq '') ||
5343: (($uri =~ m|^/*adm/|) &&
5344: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
5345: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
5346: ($uri =~ m|home/[^/]+/public_html/|)) {
5347: return undef;
5348: }
5349: my $filename=$uri;
5350: $uri=~s/\.meta$//;
5351: #
5352: # Is the metadata already cached?
5353: # Look at timestamp of caching
5354: # Everything is cached by the main uri, libraries are never directly cached
5355: #
5356: if (!defined($liburi)) {
5357: my ($result,$cached)=&is_cached_new('meta',$uri);
5358: if (defined($cached)) { return $result->{':'.$what}; }
5359: }
5360: {
5361: #
5362: # Is this a recursive call for a library?
5363: #
5364: # if (! exists($metacache{$uri})) {
5365: # $metacache{$uri}={};
5366: # }
5367: if ($liburi) {
5368: $liburi=&declutter($liburi);
5369: $filename=$liburi;
5370: } else {
5371: &devalidate_cache_new('meta',$uri);
5372: undef(%metaentry);
5373: }
5374: my %metathesekeys=();
5375: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
5376: my $metastring;
5377: if ($uri !~ m -^(uploaded|editupload)/-) {
5378: my $file=&filelocation('',&clutter($filename));
5379: #push(@{$metaentry{$uri.'.file'}},$file);
5380: $metastring=&getfile($file);
5381: }
5382: my $parser=HTML::LCParser->new(\$metastring);
5383: my $token;
5384: undef %metathesekeys;
5385: while ($token=$parser->get_token) {
5386: if ($token->[0] eq 'S') {
5387: if (defined($token->[2]->{'package'})) {
5388: #
5389: # This is a package - get package info
5390: #
5391: my $package=$token->[2]->{'package'};
5392: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5393: if (defined($token->[2]->{'id'})) {
5394: $keyroot.='_'.$token->[2]->{'id'};
5395: }
5396: if ($metaentry{':packages'}) {
5397: $metaentry{':packages'}.=','.$package.$keyroot;
5398: } else {
5399: $metaentry{':packages'}=$package.$keyroot;
5400: }
5401: foreach (sort keys %packagetab) {
5402: my $part=$keyroot;
5403: $part=~s/^\_//;
5404: if ($_=~/^\Q$package\E\&/ ||
5405: $_=~/^\Q$package\E_0\&/) {
5406: my ($pack,$name,$subp)=split(/\&/,$_);
5407: # ignore package.tab specified default values
5408: # here &package_tab_default() will fetch those
5409: if ($subp eq 'default') { next; }
5410: my $value=$packagetab{$_};
5411: my $unikey;
5412: if ($pack =~ /_0$/) {
5413: $unikey='parameter_0_'.$name;
5414: $part=0;
5415: } else {
5416: $unikey='parameter'.$keyroot.'_'.$name;
5417: }
5418: if ($subp eq 'display') {
5419: $value.=' [Part: '.$part.']';
5420: }
5421: $metaentry{':'.$unikey.'.part'}=$part;
5422: $metathesekeys{$unikey}=1;
5423: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
5424: $metaentry{':'.$unikey.'.'.$subp}=$value;
5425: }
5426: if (defined($metaentry{':'.$unikey.'.default'})) {
5427: $metaentry{':'.$unikey}=
5428: $metaentry{':'.$unikey.'.default'};
5429: }
5430: }
5431: }
5432: } else {
5433: #
5434: # This is not a package - some other kind of start tag
5435: #
5436: my $entry=$token->[1];
5437: my $unikey;
5438: if ($entry eq 'import') {
5439: $unikey='';
5440: } else {
5441: $unikey=$entry;
5442: }
5443: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5444:
5445: if (defined($token->[2]->{'id'})) {
5446: $unikey.='_'.$token->[2]->{'id'};
5447: }
5448:
5449: if ($entry eq 'import') {
5450: #
5451: # Importing a library here
5452: #
5453: if ($depthcount<20) {
5454: my $location=$parser->get_text('/import');
5455: my $dir=$filename;
5456: $dir=~s|[^/]*$||;
5457: $location=&filelocation($dir,$location);
5458: foreach (sort(split(/\,/,&metadata($uri,'keys',
5459: $location,$unikey,
5460: $depthcount+1)))) {
5461: $metaentry{':'.$_}=$metaentry{':'.$_};
5462: $metathesekeys{$_}=1;
5463: }
5464: }
5465: } else {
5466:
5467: if (defined($token->[2]->{'name'})) {
5468: $unikey.='_'.$token->[2]->{'name'};
5469: }
5470: $metathesekeys{$unikey}=1;
5471: foreach (@{$token->[3]}) {
5472: $metaentry{':'.$unikey.'.'.$_}=$token->[2]->{$_};
5473: }
5474: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
5475: my $default=$metaentry{':'.$unikey.'.default'};
5476: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
5477: # only ws inside the tag, and not in default, so use default
5478: # as value
5479: $metaentry{':'.$unikey}=$default;
5480: } else {
5481: # either something interesting inside the tag or default
5482: # uninteresting
5483: $metaentry{':'.$unikey}=$internaltext;
5484: }
5485: # end of not-a-package not-a-library import
5486: }
5487: # end of not-a-package start tag
5488: }
5489: # the next is the end of "start tag"
5490: }
5491: }
5492: my ($extension) = ($uri =~ /\.(\w+)$/);
5493: foreach my $key (sort(keys(%packagetab))) {
5494: #no specific packages #how's our extension
5495: if ($key!~/^extension_\Q$extension\E&/) { next; }
5496: &metadata_create_package_def($uri,$key,'extension_'.$extension,
5497: \%metathesekeys);
5498: }
5499: if (!exists($metaentry{':packages'})) {
5500: foreach my $key (sort(keys(%packagetab))) {
5501: #no specific packages well let's get default then
5502: if ($key!~/^default&/) { next; }
5503: &metadata_create_package_def($uri,$key,'default',
5504: \%metathesekeys);
5505: }
5506: }
5507: # are there custom rights to evaluate
5508: if ($metaentry{':copyright'} eq 'custom') {
5509:
5510: #
5511: # Importing a rights file here
5512: #
5513: unless ($depthcount) {
5514: my $location=$metaentry{':customdistributionfile'};
5515: my $dir=$filename;
5516: $dir=~s|[^/]*$||;
5517: $location=&filelocation($dir,$location);
5518: foreach (sort(split(/\,/,&metadata($uri,'keys',
5519: $location,'_rights',
5520: $depthcount+1)))) {
5521: #$metaentry{':'.$_}=$metacache{$uri}->{':'.$_};
5522: $metathesekeys{$_}=1;
5523: }
5524: }
5525: }
5526: $metaentry{':keys'}=join(',',keys %metathesekeys);
5527: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
5528: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
5529: &do_cache_new('meta',$uri,\%metaentry,60*60);
5530: # this is the end of "was not already recently cached
5531: }
5532: return $metaentry{':'.$what};
5533: }
5534:
5535: sub metadata_create_package_def {
5536: my ($uri,$key,$package,$metathesekeys)=@_;
5537: my ($pack,$name,$subp)=split(/\&/,$key);
5538: if ($subp eq 'default') { next; }
5539:
5540: if (defined($metaentry{':packages'})) {
5541: $metaentry{':packages'}.=','.$package;
5542: } else {
5543: $metaentry{':packages'}=$package;
5544: }
5545: my $value=$packagetab{$key};
5546: my $unikey;
5547: $unikey='parameter_0_'.$name;
5548: $metaentry{':'.$unikey.'.part'}=0;
5549: $$metathesekeys{$unikey}=1;
5550: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
5551: $metaentry{':'.$unikey.'.'.$subp}=$value;
5552: }
5553: if (defined($metaentry{':'.$unikey.'.default'})) {
5554: $metaentry{':'.$unikey}=
5555: $metaentry{':'.$unikey.'.default'};
5556: }
5557: }
5558:
5559: sub metadata_generate_part0 {
5560: my ($metadata,$metacache,$uri) = @_;
5561: my %allnames;
5562: foreach my $metakey (sort keys %$metadata) {
5563: if ($metakey=~/^parameter\_(.*)/) {
5564: my $part=$$metacache{':'.$metakey.'.part'};
5565: my $name=$$metacache{':'.$metakey.'.name'};
5566: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
5567: $allnames{$name}=$part;
5568: }
5569: }
5570: }
5571: foreach my $name (keys(%allnames)) {
5572: $$metadata{"parameter_0_$name"}=1;
5573: my $key=":parameter_0_$name";
5574: $$metacache{"$key.part"}='0';
5575: $$metacache{"$key.name"}=$name;
5576: $$metacache{"$key.type"}=$$metacache{':parameter_'.
5577: $allnames{$name}.'_'.$name.
5578: '.type'};
5579: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
5580: '.display'};
5581: my $expr='[Part: '.$allnames{$name}.']';
5582: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
5583: $$metacache{"$key.display"}=$olddis;
5584: }
5585: }
5586:
5587: # ------------------------------------------------- Get the title of a resource
5588:
5589: sub gettitle {
5590: my $urlsymb=shift;
5591: my $symb=&symbread($urlsymb);
5592: if ($symb) {
5593: my $key=$env{'request.course.id'}."\0".$symb;
5594: my ($result,$cached)=&is_cached_new('title',$key);
5595: if (defined($cached)) {
5596: return $result;
5597: }
5598: my ($map,$resid,$url)=&decode_symb($symb);
5599: my $title='';
5600: my %bighash;
5601: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5602: &GDBM_READER(),0640)) {
5603: my $mapid=$bighash{'map_pc_'.&clutter($map)};
5604: $title=$bighash{'title_'.$mapid.'.'.$resid};
5605: untie %bighash;
5606: }
5607: $title=~s/\&colon\;/\:/gs;
5608: if ($title) {
5609: return &do_cache_new('title',$key,$title,600);
5610: }
5611: $urlsymb=$url;
5612: }
5613: my $title=&metadata($urlsymb,'title');
5614: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
5615: return $title;
5616: }
5617:
5618: sub get_slot {
5619: my ($which,$cnum,$cdom)=@_;
5620: if (!$cnum || !$cdom) {
5621: (undef,my $courseid)=&Apache::lonxml::whichuser();
5622: $cdom=$env{'course.'.$courseid.'.domain'};
5623: $cnum=$env{'course.'.$courseid.'.num'};
5624: }
5625: my $key=join("\0",'slots',$cdom,$cnum,$which);
5626: my %slotinfo;
5627: if (exists($remembered{$key})) {
5628: $slotinfo{$which} = $remembered{$key};
5629: } else {
5630: %slotinfo=&get('slots',[$which],$cdom,$cnum);
5631: &Apache::lonhomework::showhash(%slotinfo);
5632: my ($tmp)=keys(%slotinfo);
5633: if ($tmp=~/^error:/) { return (); }
5634: $remembered{$key} = $slotinfo{$which};
5635: }
5636: if (ref($slotinfo{$which}) eq 'HASH') {
5637: return %{$slotinfo{$which}};
5638: }
5639: return $slotinfo{$which};
5640: }
5641: # ------------------------------------------------- Update symbolic store links
5642:
5643: sub symblist {
5644: my ($mapname,%newhash)=@_;
5645: $mapname=&deversion(&declutter($mapname));
5646: my %hash;
5647: if (($env{'request.course.fn'}) && (%newhash)) {
5648: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5649: &GDBM_WRCREAT(),0640)) {
5650: foreach my $url (keys %newhash) {
5651: next if ($url eq 'last_known'
5652: && $env{'form.no_update_last_known'});
5653: $hash{declutter($url)}=&encode_symb($mapname,
5654: $newhash{$url}->[1],
5655: $newhash{$url}->[0]);
5656: }
5657: if (untie(%hash)) {
5658: return 'ok';
5659: }
5660: }
5661: }
5662: return 'error';
5663: }
5664:
5665: # --------------------------------------------------------------- Verify a symb
5666:
5667: sub symbverify {
5668: my ($symb,$thisurl)=@_;
5669: my $thisfn=$thisurl;
5670: # wrapper not part of symbs
5671: $thisfn=~s/^\/adm\/wrapper//;
5672: $thisfn=~s/^\/adm\/coursedocs\/showdoc\///;
5673: $thisfn=&declutter($thisfn);
5674: # direct jump to resource in page or to a sequence - will construct own symbs
5675: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
5676: # check URL part
5677: my ($map,$resid,$url)=&decode_symb($symb);
5678:
5679: unless ($url eq $thisfn) { return 0; }
5680:
5681: $symb=&symbclean($symb);
5682: $thisurl=&deversion($thisurl);
5683: $thisfn=&deversion($thisfn);
5684:
5685: my %bighash;
5686: my $okay=0;
5687:
5688: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5689: &GDBM_READER(),0640)) {
5690: my $ids=$bighash{'ids_'.&clutter($thisurl)};
5691: unless ($ids) {
5692: $ids=$bighash{'ids_/'.$thisurl};
5693: }
5694: if ($ids) {
5695: # ------------------------------------------------------------------- Has ID(s)
5696: foreach (split(/\,/,$ids)) {
5697: my ($mapid,$resid)=split(/\./,$_);
5698: if (
5699: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
5700: eq $symb) {
5701: if (($env{'request.role.adv'}) ||
5702: $bighash{'encrypted_'.$_} eq $env{'request.enc'}) {
5703: $okay=1;
5704: }
5705: }
5706: }
5707: }
5708: untie(%bighash);
5709: }
5710: return $okay;
5711: }
5712:
5713: # --------------------------------------------------------------- Clean-up symb
5714:
5715: sub symbclean {
5716: my $symb=shift;
5717: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
5718: # remove version from map
5719: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
5720:
5721: # remove version from URL
5722: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
5723:
5724: # remove wrapper
5725:
5726: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
5727: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
5728: return $symb;
5729: }
5730:
5731: # ---------------------------------------------- Split symb to find map and url
5732:
5733: sub encode_symb {
5734: my ($map,$resid,$url)=@_;
5735: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
5736: }
5737:
5738: sub decode_symb {
5739: my $symb=shift;
5740: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
5741: my ($map,$resid,$url)=split(/___/,$symb);
5742: return (&fixversion($map),$resid,&fixversion($url));
5743: }
5744:
5745: sub fixversion {
5746: my $fn=shift;
5747: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
5748: my %bighash;
5749: my $uri=&clutter($fn);
5750: my $key=$env{'request.course.id'}.'_'.$uri;
5751: # is this cached?
5752: my ($result,$cached)=&is_cached_new('courseresversion',$key);
5753: if (defined($cached)) { return $result; }
5754: # unfortunately not cached, or expired
5755: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5756: &GDBM_READER(),0640)) {
5757: if ($bighash{'version_'.$uri}) {
5758: my $version=$bighash{'version_'.$uri};
5759: unless (($version eq 'mostrecent') ||
5760: ($version==&getversion($uri))) {
5761: $uri=~s/\.(\w+)$/\.$version\.$1/;
5762: }
5763: }
5764: untie %bighash;
5765: }
5766: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
5767: }
5768:
5769: sub deversion {
5770: my $url=shift;
5771: $url=~s/\.\d+\.(\w+)$/\.$1/;
5772: return $url;
5773: }
5774:
5775: # ------------------------------------------------------ Return symb list entry
5776:
5777: sub symbread {
5778: my ($thisfn,$donotrecurse)=@_;
5779: my $cache_str='request.symbread.cached.'.$thisfn;
5780: if (defined($env{$cache_str})) { return $env{$cache_str}; }
5781: # no filename provided? try from environment
5782: unless ($thisfn) {
5783: if ($env{'request.symb'}) {
5784: return $env{$cache_str}=&symbclean($env{'request.symb'});
5785: }
5786: $thisfn=$env{'request.filename'};
5787: }
5788: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
5789: # is that filename actually a symb? Verify, clean, and return
5790: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
5791: if (&symbverify($thisfn,$1)) {
5792: return $env{$cache_str}=&symbclean($thisfn);
5793: }
5794: }
5795: $thisfn=declutter($thisfn);
5796: my %hash;
5797: my %bighash;
5798: my $syval='';
5799: if (($env{'request.course.fn'}) && ($thisfn)) {
5800: my $targetfn = $thisfn;
5801: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
5802: $targetfn = 'adm/wrapper/'.$thisfn;
5803: }
5804: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
5805: $targetfn=$1;
5806: }
5807: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5808: &GDBM_READER(),0640)) {
5809: $syval=$hash{$targetfn};
5810: untie(%hash);
5811: }
5812: # ---------------------------------------------------------- There was an entry
5813: if ($syval) {
5814: #unless ($syval=~/\_\d+$/) {
5815: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
5816: #&appenv('request.ambiguous' => $thisfn);
5817: #return $env{$cache_str}='';
5818: #}
5819: #$syval.=$1;
5820: #}
5821: } else {
5822: # ------------------------------------------------------- Was not in symb table
5823: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5824: &GDBM_READER(),0640)) {
5825: # ---------------------------------------------- Get ID(s) for current resource
5826: my $ids=$bighash{'ids_'.&clutter($thisfn)};
5827: unless ($ids) {
5828: $ids=$bighash{'ids_/'.$thisfn};
5829: }
5830: unless ($ids) {
5831: # alias?
5832: $ids=$bighash{'mapalias_'.$thisfn};
5833: }
5834: if ($ids) {
5835: # ------------------------------------------------------------------- Has ID(s)
5836: my @possibilities=split(/\,/,$ids);
5837: if ($#possibilities==0) {
5838: # ----------------------------------------------- There is only one possibility
5839: my ($mapid,$resid)=split(/\./,$ids);
5840: $syval=&encode_symb($bighash{'map_id_'.$mapid},
5841: $resid,$thisfn);
5842: } elsif (!$donotrecurse) {
5843: # ------------------------------------------ There is more than one possibility
5844: my $realpossible=0;
5845: foreach (@possibilities) {
5846: my $file=$bighash{'src_'.$_};
5847: if (&allowed('bre',$file)) {
5848: my ($mapid,$resid)=split(/\./,$_);
5849: if ($bighash{'map_type_'.$mapid} ne 'page') {
5850: $realpossible++;
5851: $syval=&encode_symb($bighash{'map_id_'.$mapid},
5852: $resid,$thisfn);
5853: }
5854: }
5855: }
5856: if ($realpossible!=1) { $syval=''; }
5857: } else {
5858: $syval='';
5859: }
5860: }
5861: untie(%bighash)
5862: }
5863: }
5864: if ($syval) {
5865: return $env{$cache_str}=$syval;
5866: }
5867: }
5868: &appenv('request.ambiguous' => $thisfn);
5869: return $env{$cache_str}='';
5870: }
5871:
5872: # ---------------------------------------------------------- Return random seed
5873:
5874: sub numval {
5875: my $txt=shift;
5876: $txt=~tr/A-J/0-9/;
5877: $txt=~tr/a-j/0-9/;
5878: $txt=~tr/K-T/0-9/;
5879: $txt=~tr/k-t/0-9/;
5880: $txt=~tr/U-Z/0-5/;
5881: $txt=~tr/u-z/0-5/;
5882: $txt=~s/\D//g;
5883: if ($_64bit) { if ($txt > 2**32) { return -1; } }
5884: return int($txt);
5885: }
5886:
5887: sub numval2 {
5888: my $txt=shift;
5889: $txt=~tr/A-J/0-9/;
5890: $txt=~tr/a-j/0-9/;
5891: $txt=~tr/K-T/0-9/;
5892: $txt=~tr/k-t/0-9/;
5893: $txt=~tr/U-Z/0-5/;
5894: $txt=~tr/u-z/0-5/;
5895: $txt=~s/\D//g;
5896: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5897: my $total;
5898: foreach my $val (@txts) { $total+=$val; }
5899: if ($_64bit) { if ($total > 2**32) { return -1; } }
5900: return int($total);
5901: }
5902:
5903: sub numval3 {
5904: use integer;
5905: my $txt=shift;
5906: $txt=~tr/A-J/0-9/;
5907: $txt=~tr/a-j/0-9/;
5908: $txt=~tr/K-T/0-9/;
5909: $txt=~tr/k-t/0-9/;
5910: $txt=~tr/U-Z/0-5/;
5911: $txt=~tr/u-z/0-5/;
5912: $txt=~s/\D//g;
5913: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5914: my $total;
5915: foreach my $val (@txts) { $total+=$val; }
5916: if ($_64bit) { $total=(($total<<32)>>32); }
5917: return $total;
5918: }
5919:
5920: sub digest {
5921: my ($data)=@_;
5922: my $digest=&Digest::MD5::md5($data);
5923: my ($a,$b,$c,$d)=unpack("iiii",$digest);
5924: my ($e,$f);
5925: {
5926: use integer;
5927: $e=($a+$b);
5928: $f=($c+$d);
5929: if ($_64bit) {
5930: $e=(($e<<32)>>32);
5931: $f=(($f<<32)>>32);
5932: }
5933: }
5934: if (wantarray) {
5935: return ($e,$f);
5936: } else {
5937: my $g;
5938: {
5939: use integer;
5940: $g=($e+$f);
5941: if ($_64bit) {
5942: $g=(($g<<32)>>32);
5943: }
5944: }
5945: return $g;
5946: }
5947: }
5948:
5949: sub latest_rnd_algorithm_id {
5950: return '64bit5';
5951: }
5952:
5953: sub get_rand_alg {
5954: my ($courseid)=@_;
5955: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
5956: if ($courseid) {
5957: return $env{"course.$courseid.rndseed"};
5958: }
5959: return &latest_rnd_algorithm_id();
5960: }
5961:
5962: sub validCODE {
5963: my ($CODE)=@_;
5964: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
5965: return 0;
5966: }
5967:
5968: sub getCODE {
5969: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
5970: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
5971: defined($Apache::lonhomework::parsing_a_task) ) &&
5972: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
5973: return $Apache::lonhomework::history{'resource.CODE'};
5974: }
5975: return undef;
5976: }
5977:
5978: sub rndseed {
5979: my ($symb,$courseid,$domain,$username)=@_;
5980:
5981: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
5982: if (!$symb) {
5983: unless ($symb=$wsymb) { return time; }
5984: }
5985: if (!$courseid) { $courseid=$wcourseid; }
5986: if (!$domain) { $domain=$wdomain; }
5987: if (!$username) { $username=$wusername }
5988: my $which=&get_rand_alg();
5989: if (defined(&getCODE())) {
5990: if ($which eq '64bit5') {
5991: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
5992: } elsif ($which eq '64bit4') {
5993: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
5994: } else {
5995: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
5996: }
5997: } elsif ($which eq '64bit5') {
5998: return &rndseed_64bit5($symb,$courseid,$domain,$username);
5999: } elsif ($which eq '64bit4') {
6000: return &rndseed_64bit4($symb,$courseid,$domain,$username);
6001: } elsif ($which eq '64bit3') {
6002: return &rndseed_64bit3($symb,$courseid,$domain,$username);
6003: } elsif ($which eq '64bit2') {
6004: return &rndseed_64bit2($symb,$courseid,$domain,$username);
6005: } elsif ($which eq '64bit') {
6006: return &rndseed_64bit($symb,$courseid,$domain,$username);
6007: }
6008: return &rndseed_32bit($symb,$courseid,$domain,$username);
6009: }
6010:
6011: sub rndseed_32bit {
6012: my ($symb,$courseid,$domain,$username)=@_;
6013: {
6014: use integer;
6015: my $symbchck=unpack("%32C*",$symb) << 27;
6016: my $symbseed=numval($symb) << 22;
6017: my $namechck=unpack("%32C*",$username) << 17;
6018: my $nameseed=numval($username) << 12;
6019: my $domainseed=unpack("%32C*",$domain) << 7;
6020: my $courseseed=unpack("%32C*",$courseid);
6021: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
6022: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6023: #&Apache::lonxml::debug("rndseed :$num:$symb");
6024: if ($_64bit) { $num=(($num<<32)>>32); }
6025: return $num;
6026: }
6027: }
6028:
6029: sub rndseed_64bit {
6030: my ($symb,$courseid,$domain,$username)=@_;
6031: {
6032: use integer;
6033: my $symbchck=unpack("%32S*",$symb) << 21;
6034: my $symbseed=numval($symb) << 10;
6035: my $namechck=unpack("%32S*",$username);
6036:
6037: my $nameseed=numval($username) << 21;
6038: my $domainseed=unpack("%32S*",$domain) << 10;
6039: my $courseseed=unpack("%32S*",$courseid);
6040:
6041: my $num1=$symbchck+$symbseed+$namechck;
6042: my $num2=$nameseed+$domainseed+$courseseed;
6043: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6044: #&Apache::lonxml::debug("rndseed :$num:$symb");
6045: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6046: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6047: return "$num1,$num2";
6048: }
6049: }
6050:
6051: sub rndseed_64bit2 {
6052: my ($symb,$courseid,$domain,$username)=@_;
6053: {
6054: use integer;
6055: # strings need to be an even # of cahracters long, it it is odd the
6056: # last characters gets thrown away
6057: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6058: my $symbseed=numval($symb) << 10;
6059: my $namechck=unpack("%32S*",$username.' ');
6060:
6061: my $nameseed=numval($username) << 21;
6062: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6063: my $courseseed=unpack("%32S*",$courseid.' ');
6064:
6065: my $num1=$symbchck+$symbseed+$namechck;
6066: my $num2=$nameseed+$domainseed+$courseseed;
6067: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6068: #&Apache::lonxml::debug("rndseed :$num:$symb");
6069: return "$num1,$num2";
6070: }
6071: }
6072:
6073: sub rndseed_64bit3 {
6074: my ($symb,$courseid,$domain,$username)=@_;
6075: {
6076: use integer;
6077: # strings need to be an even # of cahracters long, it it is odd the
6078: # last characters gets thrown away
6079: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6080: my $symbseed=numval2($symb) << 10;
6081: my $namechck=unpack("%32S*",$username.' ');
6082:
6083: my $nameseed=numval2($username) << 21;
6084: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6085: my $courseseed=unpack("%32S*",$courseid.' ');
6086:
6087: my $num1=$symbchck+$symbseed+$namechck;
6088: my $num2=$nameseed+$domainseed+$courseseed;
6089: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6090: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
6091: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6092:
6093: return "$num1:$num2";
6094: }
6095: }
6096:
6097: sub rndseed_64bit4 {
6098: my ($symb,$courseid,$domain,$username)=@_;
6099: {
6100: use integer;
6101: # strings need to be an even # of cahracters long, it it is odd the
6102: # last characters gets thrown away
6103: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6104: my $symbseed=numval3($symb) << 10;
6105: my $namechck=unpack("%32S*",$username.' ');
6106:
6107: my $nameseed=numval3($username) << 21;
6108: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6109: my $courseseed=unpack("%32S*",$courseid.' ');
6110:
6111: my $num1=$symbchck+$symbseed+$namechck;
6112: my $num2=$nameseed+$domainseed+$courseseed;
6113: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6114: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
6115: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6116:
6117: return "$num1:$num2";
6118: }
6119: }
6120:
6121: sub rndseed_64bit5 {
6122: my ($symb,$courseid,$domain,$username)=@_;
6123: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
6124: return "$num1:$num2";
6125: }
6126:
6127: sub rndseed_CODE_64bit {
6128: my ($symb,$courseid,$domain,$username)=@_;
6129: {
6130: use integer;
6131: my $symbchck=unpack("%32S*",$symb.' ') << 16;
6132: my $symbseed=numval2($symb);
6133: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
6134: my $CODEseed=numval(&getCODE());
6135: my $courseseed=unpack("%32S*",$courseid.' ');
6136: my $num1=$symbseed+$CODEchck;
6137: my $num2=$CODEseed+$courseseed+$symbchck;
6138: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
6139: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
6140: if ($_64bit) { $num1=(($num1<<32)>>32); }
6141: if ($_64bit) { $num2=(($num2<<32)>>32); }
6142: return "$num1:$num2";
6143: }
6144: }
6145:
6146: sub rndseed_CODE_64bit4 {
6147: my ($symb,$courseid,$domain,$username)=@_;
6148: {
6149: use integer;
6150: my $symbchck=unpack("%32S*",$symb.' ') << 16;
6151: my $symbseed=numval3($symb);
6152: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
6153: my $CODEseed=numval3(&getCODE());
6154: my $courseseed=unpack("%32S*",$courseid.' ');
6155: my $num1=$symbseed+$CODEchck;
6156: my $num2=$CODEseed+$courseseed+$symbchck;
6157: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
6158: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
6159: if ($_64bit) { $num1=(($num1<<32)>>32); }
6160: if ($_64bit) { $num2=(($num2<<32)>>32); }
6161: return "$num1:$num2";
6162: }
6163: }
6164:
6165: sub rndseed_CODE_64bit5 {
6166: my ($symb,$courseid,$domain,$username)=@_;
6167: my $code = &getCODE();
6168: my ($num1,$num2)=&digest("$symb,$courseid,$code");
6169: return "$num1:$num2";
6170: }
6171:
6172: sub setup_random_from_rndseed {
6173: my ($rndseed)=@_;
6174: if ($rndseed =~/([,:])/) {
6175: my ($num1,$num2)=split(/[,:]/,$rndseed);
6176: &Math::Random::random_set_seed(abs($num1),abs($num2));
6177: } else {
6178: &Math::Random::random_set_seed_from_phrase($rndseed);
6179: }
6180: }
6181:
6182: sub latest_receipt_algorithm_id {
6183: return 'receipt2';
6184: }
6185:
6186: sub recunique {
6187: my $fucourseid=shift;
6188: my $unique;
6189: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
6190: $unique=$env{"course.$fucourseid.internal.encseed"};
6191: } else {
6192: $unique=$perlvar{'lonReceipt'};
6193: }
6194: return unpack("%32C*",$unique);
6195: }
6196:
6197: sub recprefix {
6198: my $fucourseid=shift;
6199: my $prefix;
6200: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
6201: $prefix=$env{"course.$fucourseid.internal.encpref"};
6202: } else {
6203: $prefix=$perlvar{'lonHostID'};
6204: }
6205: return unpack("%32C*",$prefix);
6206: }
6207:
6208: sub ireceipt {
6209: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
6210: my $cuname=unpack("%32C*",$funame);
6211: my $cudom=unpack("%32C*",$fudom);
6212: my $cucourseid=unpack("%32C*",$fucourseid);
6213: my $cusymb=unpack("%32C*",$fusymb);
6214: my $cunique=&recunique($fucourseid);
6215: my $cpart=unpack("%32S*",$part);
6216: my $return =&recprefix($fucourseid).'-';
6217: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
6218: $env{'request.state'} eq 'construct') {
6219: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
6220: " and ".($cpart%$cudom));
6221:
6222: $return.= ($cunique%$cuname+
6223: $cunique%$cudom+
6224: $cusymb%$cuname+
6225: $cusymb%$cudom+
6226: $cucourseid%$cuname+
6227: $cucourseid%$cudom+
6228: $cpart%$cuname+
6229: $cpart%$cudom);
6230: } else {
6231: $return.= ($cunique%$cuname+
6232: $cunique%$cudom+
6233: $cusymb%$cuname+
6234: $cusymb%$cudom+
6235: $cucourseid%$cuname+
6236: $cucourseid%$cudom);
6237: }
6238: return $return;
6239: }
6240:
6241: sub receipt {
6242: my ($part)=@_;
6243: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
6244: return &ireceipt($name,$domain,$courseid,$symb,$part);
6245: }
6246:
6247: # ------------------------------------------------------------ Serves up a file
6248: # returns either the contents of the file or
6249: # -1 if the file doesn't exist
6250: #
6251: # if the target is a file that was uploaded via DOCS,
6252: # a check will be made to see if a current copy exists on the local server,
6253: # if it does this will be served, otherwise a copy will be retrieved from
6254: # the home server for the course and stored in /home/httpd/html/userfiles on
6255: # the local server.
6256:
6257: sub getfile {
6258: my ($file) = @_;
6259: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
6260: &repcopy($file);
6261: return &readfile($file);
6262: }
6263:
6264: sub repcopy_userfile {
6265: my ($file)=@_;
6266: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
6267: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
6268: my ($cdom,$cnum,$filename) =
6269: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
6270: my ($info,$rtncode);
6271: my $uri="/uploaded/$cdom/$cnum/$filename";
6272: if (-e "$file") {
6273: my @fileinfo = stat($file);
6274: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
6275: if ($lwpresp ne 'ok') {
6276: if ($rtncode eq '404') {
6277: unlink($file);
6278: }
6279: #my $ua=new LWP::UserAgent;
6280: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6281: #my $response=$ua->request($request);
6282: #if ($response->is_success()) {
6283: # return $response->content;
6284: # } else {
6285: # return -1;
6286: # }
6287: return -1;
6288: }
6289: if ($info < $fileinfo[9]) {
6290: return 'ok';
6291: }
6292: $info = '';
6293: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
6294: if ($lwpresp ne 'ok') {
6295: return -1;
6296: }
6297: } else {
6298: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
6299: if ($lwpresp ne 'ok') {
6300: my $ua=new LWP::UserAgent;
6301: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6302: my $response=$ua->request($request);
6303: if ($response->is_success()) {
6304: $info=$response->content;
6305: } else {
6306: return -1;
6307: }
6308: }
6309: my @parts = ($cdom,$cnum);
6310: if ($filename =~ m|^(.+)/[^/]+$|) {
6311: push @parts, split(/\//,$1);
6312: }
6313: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
6314: foreach my $part (@parts) {
6315: $path .= '/'.$part;
6316: if (!-e $path) {
6317: mkdir($path,0770);
6318: }
6319: }
6320: }
6321: open(FILE,">$file");
6322: print FILE $info;
6323: close(FILE);
6324: return 'ok';
6325: }
6326:
6327: sub tokenwrapper {
6328: my $uri=shift;
6329: $uri=~s|^http\://([^/]+)||;
6330: $uri=~s|^/||;
6331: $env{'user.environment'}=~/\/([^\/]+)\.id/;
6332: my $token=$1;
6333: my (undef,$udom,$uname,$file)=split('/',$uri,4);
6334: if ($udom && $uname && $file) {
6335: $file=~s|(\?\.*)*$||;
6336: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
6337: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
6338: (($uri=~/\?/)?'&':'?').'token='.$token.
6339: '&tokenissued='.$perlvar{'lonHostID'};
6340: } else {
6341: return '/adm/notfound.html';
6342: }
6343: }
6344:
6345: sub getuploaded {
6346: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
6347: $uri=~s/^\///;
6348: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
6349: my $ua=new LWP::UserAgent;
6350: my $request=new HTTP::Request($reqtype,$uri);
6351: my $response=$ua->request($request);
6352: $$rtncode = $response->code;
6353: if (! $response->is_success()) {
6354: return 'failed';
6355: }
6356: if ($reqtype eq 'HEAD') {
6357: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
6358: } elsif ($reqtype eq 'GET') {
6359: $$info = $response->content;
6360: }
6361: return 'ok';
6362: }
6363:
6364: sub readfile {
6365: my $file = shift;
6366: if ( (! -e $file ) || ($file eq '') ) { return -1; };
6367: my $fh;
6368: open($fh,"<$file");
6369: my $a='';
6370: while (<$fh>) { $a .=$_; }
6371: return $a;
6372: }
6373:
6374: sub filelocation {
6375: my ($dir,$file) = @_;
6376: my $location;
6377: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
6378:
6379: if ($file =~ m-^/adm/-) {
6380: $file=~s-^/adm/wrapper/-/-;
6381: $file=~s-^/adm/coursedocs/showdoc/-/-;
6382: }
6383: if ($file=~m:^/~:) { # is a contruction space reference
6384: $location = $file;
6385: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
6386: } elsif ($file=~m:^/home/[^/]*/public_html/:) {
6387: # is a correct contruction space reference
6388: $location = $file;
6389: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
6390: my ($udom,$uname,$filename)=
6391: ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
6392: my $home=&homeserver($uname,$udom);
6393: my $is_me=0;
6394: my @ids=¤t_machine_ids();
6395: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
6396: if ($is_me) {
6397: $location=&Apache::loncommon::propath($udom,$uname).
6398: '/userfiles/'.$filename;
6399: } else {
6400: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
6401: $udom.'/'.$uname.'/'.$filename;
6402: }
6403: } else {
6404: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
6405: $file=~s:^/res/:/:;
6406: if ( !( $file =~ m:^/:) ) {
6407: $location = $dir. '/'.$file;
6408: } else {
6409: $location = '/home/httpd/html/res'.$file;
6410: }
6411: }
6412: $location=~s://+:/:g; # remove duplicate /
6413: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
6414: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
6415: return $location;
6416: }
6417:
6418: sub hreflocation {
6419: my ($dir,$file)=@_;
6420: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
6421: $file=filelocation($dir,$file);
6422: } elsif ($file=~m-^/adm/-) {
6423: $file=~s-^/adm/wrapper/-/-;
6424: $file=~s-^/adm/coursedocs/showdoc/-/-;
6425: }
6426: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
6427: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
6428: } elsif ($file=~m-/home/(\w+)/public_html/-) {
6429: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
6430: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
6431: $file=~s-^/home/httpd/lonUsers/([^/]*)/./././([^/]*)/userfiles/
6432: -/uploaded/$1/$2/-x;
6433: }
6434: return $file;
6435: }
6436:
6437: sub current_machine_domains {
6438: my $hostname=$hostname{$perlvar{'lonHostID'}};
6439: my @domains;
6440: while( my($id, $name) = each(%hostname)) {
6441: # &logthis("-$id-$name-$hostname-");
6442: if ($hostname eq $name) {
6443: push(@domains,$hostdom{$id});
6444: }
6445: }
6446: return @domains;
6447: }
6448:
6449: sub current_machine_ids {
6450: my $hostname=$hostname{$perlvar{'lonHostID'}};
6451: my @ids;
6452: while( my($id, $name) = each(%hostname)) {
6453: # &logthis("-$id-$name-$hostname-");
6454: if ($hostname eq $name) {
6455: push(@ids,$id);
6456: }
6457: }
6458: return @ids;
6459: }
6460:
6461: # ------------------------------------------------------------- Declutters URLs
6462:
6463: sub declutter {
6464: my $thisfn=shift;
6465: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
6466: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
6467: $thisfn=~s/^\///;
6468: $thisfn=~s|^adm/wrapper/||;
6469: $thisfn=~s|^adm/coursedocs/showdoc/||;
6470: $thisfn=~s/^res\///;
6471: $thisfn=~s/\?.+$//;
6472: return $thisfn;
6473: }
6474:
6475: # ------------------------------------------------------------- Clutter up URLs
6476:
6477: sub clutter {
6478: my $thisfn='/'.&declutter(shift);
6479: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
6480: $thisfn='/res'.$thisfn;
6481: }
6482: if ($thisfn !~m|/adm|) {
6483: if ($thisfn =~ m|/ext/|) {
6484: $thisfn='/adm/wrapper'.$thisfn;
6485: } else {
6486: my ($ext) = ($thisfn =~ /\.(\w+)$/);
6487: my $embstyle=&Apache::loncommon::fileembstyle($ext);
6488: if ($embstyle eq 'ssi'
6489: || ($embstyle eq 'hdn')
6490: || ($embstyle eq 'rat')
6491: || ($embstyle eq 'prv')
6492: || ($embstyle eq 'ign')) {
6493: #do nothing with these
6494: } elsif (($embstyle eq 'img')
6495: || ($embstyle eq 'emb')
6496: || ($embstyle eq 'wrp')) {
6497: $thisfn='/adm/wrapper'.$thisfn;
6498: } elsif ($embstyle eq 'unk'
6499: && $thisfn!~/\.(sequence|page)$/) {
6500: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
6501: } else {
6502: # &logthis("Got a blank emb style");
6503: }
6504: }
6505: }
6506: return $thisfn;
6507: }
6508:
6509: sub freeze_escape {
6510: my ($value)=@_;
6511: if (ref($value)) {
6512: $value=&nfreeze($value);
6513: return '__FROZEN__'.&escape($value);
6514: }
6515: return &escape($value);
6516: }
6517:
6518: # -------------------------------------------------------- Escape Special Chars
6519:
6520: sub escape {
6521: my $str=shift;
6522: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
6523: return $str;
6524: }
6525:
6526: # ----------------------------------------------------- Un-Escape Special Chars
6527:
6528: sub unescape {
6529: my $str=shift;
6530: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
6531: return $str;
6532: }
6533:
6534: sub thaw_unescape {
6535: my ($value)=@_;
6536: if ($value =~ /^__FROZEN__/) {
6537: substr($value,0,10,undef);
6538: $value=&unescape($value);
6539: return &thaw($value);
6540: }
6541: return &unescape($value);
6542: }
6543:
6544: sub correct_line_ends {
6545: my ($result)=@_;
6546: $$result =~s/\r\n/\n/mg;
6547: $$result =~s/\r/\n/mg;
6548: }
6549: # ================================================================ Main Program
6550:
6551: sub goodbye {
6552: &logthis("Starting Shut down");
6553: #not converted to using infrastruture and probably shouldn't be
6554: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
6555: #converted
6556: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
6557: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
6558: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
6559: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
6560: #1.1 only
6561: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
6562: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
6563: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
6564: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
6565: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
6566: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
6567: &logthis(sprintf("%-20s is %s",'hits',$hits));
6568: &flushcourselogs();
6569: &logthis("Shutting down");
6570: }
6571:
6572: BEGIN {
6573: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
6574: unless ($readit) {
6575: {
6576: # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
6577: open(my $config,"</etc/httpd/conf/loncapa.conf");
6578:
6579: while (my $configline=<$config>) {
6580: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
6581: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
6582: chomp($varvalue);
6583: $perlvar{$varname}=$varvalue;
6584: }
6585: }
6586: close($config);
6587: }
6588: {
6589: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
6590:
6591: while (my $configline=<$config>) {
6592: if ($configline =~ /^[^\#]*PerlSetVar/) {
6593: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
6594: chomp($varvalue);
6595: $perlvar{$varname}=$varvalue;
6596: }
6597: }
6598: close($config);
6599: }
6600:
6601: # ------------------------------------------------------------ Read domain file
6602: {
6603: %domaindescription = ();
6604: %domain_auth_def = ();
6605: %domain_auth_arg_def = ();
6606: my $fh;
6607: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
6608: while (<$fh>) {
6609: next if (/^(\#|\s*$)/);
6610: # next if /^\#/;
6611: chomp;
6612: my ($domain, $domain_description, $def_auth, $def_auth_arg,
6613: $def_lang, $city, $longi, $lati, $primary) = split(/:/,$_);
6614: $domain_auth_def{$domain}=$def_auth;
6615: $domain_auth_arg_def{$domain}=$def_auth_arg;
6616: $domaindescription{$domain}=$domain_description;
6617: $domain_lang_def{$domain}=$def_lang;
6618: $domain_city{$domain}=$city;
6619: $domain_longi{$domain}=$longi;
6620: $domain_lati{$domain}=$lati;
6621: $domain_primary{$domain}=$primary;
6622:
6623: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
6624: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
6625: }
6626: }
6627: close ($fh);
6628: }
6629:
6630:
6631: # ------------------------------------------------------------- Read hosts file
6632: {
6633: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
6634:
6635: while (my $configline=<$config>) {
6636: next if ($configline =~ /^(\#|\s*$)/);
6637: chomp($configline);
6638: my ($id,$domain,$role,$name)=split(/:/,$configline);
6639: $name=~s/\s//g;
6640: if ($id && $domain && $role && $name) {
6641: $hostname{$id}=$name;
6642: $hostdom{$id}=$domain;
6643: if ($role eq 'library') { $libserv{$id}=$name; }
6644: }
6645: }
6646: close($config);
6647: # FIXME: dev server don't want this, production servers _do_ want this
6648: #&get_iphost();
6649: }
6650:
6651: sub get_iphost {
6652: if (%iphost) { return %iphost; }
6653: my %name_to_ip;
6654: foreach my $id (keys(%hostname)) {
6655: my $name=$hostname{$id};
6656: my $ip;
6657: if (!exists($name_to_ip{$name})) {
6658: $ip = gethostbyname($name);
6659: if (!$ip || length($ip) ne 4) {
6660: &logthis("Skipping host $id name $name no IP found\n");
6661: next;
6662: }
6663: $ip=inet_ntoa($ip);
6664: $name_to_ip{$name} = $ip;
6665: } else {
6666: $ip = $name_to_ip{$name};
6667: }
6668: push(@{$iphost{$ip}},$id);
6669: }
6670: return %iphost;
6671: }
6672:
6673: # ------------------------------------------------------ Read spare server file
6674: {
6675: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
6676:
6677: while (my $configline=<$config>) {
6678: chomp($configline);
6679: if ($configline) {
6680: $spareid{$configline}=1;
6681: }
6682: }
6683: close($config);
6684: }
6685: # ------------------------------------------------------------ Read permissions
6686: {
6687: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
6688:
6689: while (my $configline=<$config>) {
6690: chomp($configline);
6691: if ($configline) {
6692: my ($role,$perm)=split(/ /,$configline);
6693: if ($perm ne '') { $pr{$role}=$perm; }
6694: }
6695: }
6696: close($config);
6697: }
6698:
6699: # -------------------------------------------- Read plain texts for permissions
6700: {
6701: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
6702:
6703: while (my $configline=<$config>) {
6704: chomp($configline);
6705: if ($configline) {
6706: my ($short,$plain)=split(/:/,$configline);
6707: if ($plain ne '') { $prp{$short}=$plain; }
6708: }
6709: }
6710: close($config);
6711: }
6712:
6713: # ---------------------------------------------------------- Read package table
6714: {
6715: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
6716:
6717: while (my $configline=<$config>) {
6718: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
6719: chomp($configline);
6720: my ($short,$plain)=split(/:/,$configline);
6721: my ($pack,$name)=split(/\&/,$short);
6722: if ($plain ne '') {
6723: $packagetab{$pack.'&'.$name.'&name'}=$name;
6724: $packagetab{$short}=$plain;
6725: }
6726: }
6727: close($config);
6728: }
6729:
6730: # ------------- set up temporary directory
6731: {
6732: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
6733:
6734: }
6735:
6736: $memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
6737:
6738: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
6739: $dumpcount=0;
6740:
6741: &logtouch();
6742: &logthis('<font color="yellow">INFO: Read configuration</font>');
6743: $readit=1;
6744: {
6745: use integer;
6746: my $test=(2**32)+1;
6747: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
6748: &logthis(" Detected 64bit platform ($_64bit)");
6749: }
6750: }
6751: }
6752:
6753: 1;
6754: __END__
6755:
6756: =pod
6757:
6758: =head1 NAME
6759:
6760: Apache::lonnet - Subroutines to ask questions about things in the network.
6761:
6762: =head1 SYNOPSIS
6763:
6764: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
6765:
6766: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
6767:
6768: Common parameters:
6769:
6770: =over 4
6771:
6772: =item *
6773:
6774: $uname : an internal username (if $cname expecting a course Id specifically)
6775:
6776: =item *
6777:
6778: $udom : a domain (if $cdom expecting a course's domain specifically)
6779:
6780: =item *
6781:
6782: $symb : a resource instance identifier
6783:
6784: =item *
6785:
6786: $namespace : the name of a .db file that contains the data needed or
6787: being set.
6788:
6789: =back
6790:
6791: =head1 OVERVIEW
6792:
6793: lonnet provides subroutines which interact with the
6794: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
6795: about classes, users, and resources.
6796:
6797: For many of these objects you can also use this to store data about
6798: them or modify them in various ways.
6799:
6800: =head2 Symbs
6801:
6802: To identify a specific instance of a resource, LON-CAPA uses symbols
6803: or "symbs"X<symb>. These identifiers are built from the URL of the
6804: map, the resource number of the resource in the map, and the URL of
6805: the resource itself. The latter is somewhat redundant, but might help
6806: if maps change.
6807:
6808: An example is
6809:
6810: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
6811:
6812: The respective map entry is
6813:
6814: <resource id="19" src="/res/msu/korte/tests/part12.problem"
6815: title="Problem 2">
6816: </resource>
6817:
6818: Symbs are used by the random number generator, as well as to store and
6819: restore data specific to a certain instance of for example a problem.
6820:
6821: =head2 Storing And Retrieving Data
6822:
6823: X<store()>X<cstore()>X<restore()>Three of the most important functions
6824: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
6825: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
6826: is is the non-critical message twin of cstore. These functions are for
6827: handlers to store a perl hash to a user's permanent data space in an
6828: easy manner, and to retrieve it again on another call. It is expected
6829: that a handler would use this once at the beginning to retrieve data,
6830: and then again once at the end to send only the new data back.
6831:
6832: The data is stored in the user's data directory on the user's
6833: homeserver under the ID of the course.
6834:
6835: The hash that is returned by restore will have all of the previous
6836: value for all of the elements of the hash.
6837:
6838: Example:
6839:
6840: #creating a hash
6841: my %hash;
6842: $hash{'foo'}='bar';
6843:
6844: #storing it
6845: &Apache::lonnet::cstore(\%hash);
6846:
6847: #changing a value
6848: $hash{'foo'}='notbar';
6849:
6850: #adding a new value
6851: $hash{'bar'}='foo';
6852: &Apache::lonnet::cstore(\%hash);
6853:
6854: #retrieving the hash
6855: my %history=&Apache::lonnet::restore();
6856:
6857: #print the hash
6858: foreach my $key (sort(keys(%history))) {
6859: print("\%history{$key} = $history{$key}");
6860: }
6861:
6862: Will print out:
6863:
6864: %history{1:foo} = bar
6865: %history{1:keys} = foo:timestamp
6866: %history{1:timestamp} = 990455579
6867: %history{2:bar} = foo
6868: %history{2:foo} = notbar
6869: %history{2:keys} = foo:bar:timestamp
6870: %history{2:timestamp} = 990455580
6871: %history{bar} = foo
6872: %history{foo} = notbar
6873: %history{timestamp} = 990455580
6874: %history{version} = 2
6875:
6876: Note that the special hash entries C<keys>, C<version> and
6877: C<timestamp> were added to the hash. C<version> will be equal to the
6878: total number of versions of the data that have been stored. The
6879: C<timestamp> attribute will be the UNIX time the hash was
6880: stored. C<keys> is available in every historical section to list which
6881: keys were added or changed at a specific historical revision of a
6882: hash.
6883:
6884: B<Warning>: do not store the hash that restore returns directly. This
6885: will cause a mess since it will restore the historical keys as if the
6886: were new keys. I.E. 1:foo will become 1:1:foo etc.
6887:
6888: Calling convention:
6889:
6890: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
6891: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
6892:
6893: For more detailed information, see lonnet specific documentation.
6894:
6895: =head1 RETURN MESSAGES
6896:
6897: =over 4
6898:
6899: =item * B<con_lost>: unable to contact remote host
6900:
6901: =item * B<con_delayed>: unable to contact remote host, message will be delivered
6902: when the connection is brought back up
6903:
6904: =item * B<con_failed>: unable to contact remote host and unable to save message
6905: for later delivery
6906:
6907: =item * B<error:>: an error a occured, a description of the error follows the :
6908:
6909: =item * B<no_such_host>: unable to fund a host associated with the user/domain
6910: that was requested
6911:
6912: =back
6913:
6914: =head1 PUBLIC SUBROUTINES
6915:
6916: =head2 Session Environment Functions
6917:
6918: =over 4
6919:
6920: =item *
6921: X<appenv()>
6922: B<appenv(%hash)>: the value of %hash is written to
6923: the user envirnoment file, and will be restored for each access this
6924: user makes during this session, also modifies the %env for the current
6925: process
6926:
6927: =item *
6928: X<delenv()>
6929: B<delenv($regexp)>: removes all items from the session
6930: environment file that matches the regular expression in $regexp. The
6931: values are also delted from the current processes %env.
6932:
6933: =back
6934:
6935: =head2 User Information
6936:
6937: =over 4
6938:
6939: =item *
6940: X<queryauthenticate()>
6941: B<queryauthenticate($uname,$udom)>: try to determine user's current
6942: authentication scheme
6943:
6944: =item *
6945: X<authenticate()>
6946: B<authenticate($uname,$upass,$udom)>: try to
6947: authenticate user from domain's lib servers (first use the current
6948: one). C<$upass> should be the users password.
6949:
6950: =item *
6951: X<homeserver()>
6952: B<homeserver($uname,$udom)>: find the server which has
6953: the user's directory and files (there must be only one), this caches
6954: the answer, and also caches if there is a borken connection.
6955:
6956: =item *
6957: X<idget()>
6958: B<idget($udom,@ids)>: find the usernames behind a list of IDs
6959: (IDs are a unique resource in a domain, there must be only 1 ID per
6960: username, and only 1 username per ID in a specific domain) (returns
6961: hash: id=>name,id=>name)
6962:
6963: =item *
6964: X<idrget()>
6965: B<idrget($udom,@unames)>: find the IDs behind a list of
6966: usernames (returns hash: name=>id,name=>id)
6967:
6968: =item *
6969: X<idput()>
6970: B<idput($udom,%ids)>: store away a list of names and associated IDs
6971:
6972: =item *
6973: X<rolesinit()>
6974: B<rolesinit($udom,$username,$authhost)>: get user privileges
6975:
6976: =item *
6977: X<getsection()>
6978: B<getsection($udom,$uname,$cname)>: finds the section of student in the
6979: course $cname, return section name/number or '' for "not in course"
6980: and '-1' for "no section"
6981:
6982: =item *
6983: X<userenvironment()>
6984: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
6985: passed in @what from the requested user's environment, returns a hash
6986:
6987: =back
6988:
6989: =head2 User Roles
6990:
6991: =over 4
6992:
6993: =item *
6994:
6995: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
6996: actions
6997: F: full access
6998: U,I,K: authentication modes (cxx only)
6999: '': forbidden
7000: 1: user needs to choose course
7001: 2: browse allowed
7002:
7003: =item *
7004:
7005: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
7006: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
7007: and course level
7008:
7009: =item *
7010:
7011: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
7012: explanation of a user role term
7013:
7014: =back
7015:
7016: =head2 User Modification
7017:
7018: =over 4
7019:
7020: =item *
7021:
7022: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
7023: user for the level given by URL. Optional start and end dates (leave empty
7024: string or zero for "no date")
7025:
7026: =item *
7027:
7028: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
7029: change a users, password, possible return values are: ok,
7030: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
7031: refused
7032:
7033: =item *
7034:
7035: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
7036:
7037: =item *
7038:
7039: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
7040: modify user
7041:
7042: =item *
7043:
7044: modifystudent
7045:
7046: modify a students enrollment and identification information.
7047: The course id is resolved based on the current users environment.
7048: This means the envoking user must be a course coordinator or otherwise
7049: associated with a course.
7050:
7051: This call is essentially a wrapper for lonnet::modifyuser and
7052: lonnet::modify_student_enrollment
7053:
7054: Inputs:
7055:
7056: =over 4
7057:
7058: =item B<$udom> Students loncapa domain
7059:
7060: =item B<$uname> Students loncapa login name
7061:
7062: =item B<$uid> Students id/student number
7063:
7064: =item B<$umode> Students authentication mode
7065:
7066: =item B<$upass> Students password
7067:
7068: =item B<$first> Students first name
7069:
7070: =item B<$middle> Students middle name
7071:
7072: =item B<$last> Students last name
7073:
7074: =item B<$gene> Students generation
7075:
7076: =item B<$usec> Students section in course
7077:
7078: =item B<$end> Unix time of the roles expiration
7079:
7080: =item B<$start> Unix time of the roles start date
7081:
7082: =item B<$forceid> If defined, allow $uid to be changed
7083:
7084: =item B<$desiredhome> server to use as home server for student
7085:
7086: =back
7087:
7088: =item *
7089:
7090: modify_student_enrollment
7091:
7092: Change a students enrollment status in a class. The environment variable
7093: 'role.request.course' must be defined for this function to proceed.
7094:
7095: Inputs:
7096:
7097: =over 4
7098:
7099: =item $udom, students domain
7100:
7101: =item $uname, students name
7102:
7103: =item $uid, students user id
7104:
7105: =item $first, students first name
7106:
7107: =item $middle
7108:
7109: =item $last
7110:
7111: =item $gene
7112:
7113: =item $usec
7114:
7115: =item $end
7116:
7117: =item $start
7118:
7119: =back
7120:
7121:
7122: =item *
7123:
7124: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
7125: custom role; give a custom role to a user for the level given by URL. Specify
7126: name and domain of role author, and role name
7127:
7128: =item *
7129:
7130: revokerole($udom,$uname,$url,$role) : revoke a role for url
7131:
7132: =item *
7133:
7134: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
7135:
7136: =back
7137:
7138: =head2 Course Infomation
7139:
7140: =over 4
7141:
7142: =item *
7143:
7144: coursedescription($courseid) : returns a hash of information about the
7145: specified course id, including all environment settings for the
7146: course, the description of the course will be in the hash under the
7147: key 'description'
7148:
7149: =item *
7150:
7151: resdata($name,$domain,$type,@which) : request for current parameter
7152: setting for a specific $type, where $type is either 'course' or 'user',
7153: @what should be a list of parameters to ask about. This routine caches
7154: answers for 5 minutes.
7155:
7156: =back
7157:
7158: =head2 Course Modification
7159:
7160: =over 4
7161:
7162: =item *
7163:
7164: writecoursepref($courseid,%prefs) : write preferences (environment
7165: database) for a course
7166:
7167: =item *
7168:
7169: createcourse($udom,$description,$url) : make/modify course
7170:
7171: =back
7172:
7173: =head2 Resource Subroutines
7174:
7175: =over 4
7176:
7177: =item *
7178:
7179: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
7180:
7181: =item *
7182:
7183: repcopy($filename) : subscribes to the requested file, and attempts to
7184: replicate from the owning library server, Might return
7185: 'unavailable', 'not_found', 'forbidden', 'ok', or
7186: 'bad_request', also attempts to grab the metadata for the
7187: resource. Expects the local filesystem pathname
7188: (/home/httpd/html/res/....)
7189:
7190: =back
7191:
7192: =head2 Resource Information
7193:
7194: =over 4
7195:
7196: =item *
7197:
7198: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
7199: a vairety of different possible values, $varname should be a request
7200: string, and the other parameters can be used to specify who and what
7201: one is asking about.
7202:
7203: Possible values for $varname are environment.lastname (or other item
7204: from the envirnment hash), user.name (or someother aspect about the
7205: user), resource.0.maxtries (or some other part and parameter of a
7206: resource)
7207:
7208: =item *
7209:
7210: directcondval($number) : get current value of a condition; reads from a state
7211: string
7212:
7213: =item *
7214:
7215: condval($condidx) : value of condition index based on state
7216:
7217: =item *
7218:
7219: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
7220: resource's metadata, $what should be either a specific key, or either
7221: 'keys' (to get a list of possible keys) or 'packages' to get a list of
7222: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
7223:
7224: this function automatically caches all requests
7225:
7226: =item *
7227:
7228: metadata_query($query,$custom,$customshow) : make a metadata query against the
7229: network of library servers; returns file handle of where SQL and regex results
7230: will be stored for query
7231:
7232: =item *
7233:
7234: symbread($filename) : return symbolic list entry (filename argument optional);
7235: returns the data handle
7236:
7237: =item *
7238:
7239: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
7240: a possible symb for the URL in $thisfn, and if is an encryypted
7241: resource that the user accessed using /enc/ returns a 1 on success, 0
7242: on failure, user must be in a course, as it assumes the existance of
7243: the course initial hash, and uses $env('request.course.id'}
7244:
7245:
7246: =item *
7247:
7248: symbclean($symb) : removes versions numbers from a symb, returns the
7249: cleaned symb
7250:
7251: =item *
7252:
7253: is_on_map($uri) : checks if the $uri is somewhere on the current
7254: course map, user must be in a course for it to work.
7255:
7256: =item *
7257:
7258: numval($salt) : return random seed value (addend for rndseed)
7259:
7260: =item *
7261:
7262: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
7263: a random seed, all arguments are optional, if they aren't sent it uses the
7264: environment to derive them. Note: if symb isn't sent and it can't get one
7265: from &symbread it will use the current time as its return value
7266:
7267: =item *
7268:
7269: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
7270: unfakeable, receipt
7271:
7272: =item *
7273:
7274: receipt() : API to ireceipt working off of env values; given out to users
7275:
7276: =item *
7277:
7278: countacc($url) : count the number of accesses to a given URL
7279:
7280: =item *
7281:
7282: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
7283:
7284: =item *
7285:
7286: checkin($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 $tcrsid)
7287:
7288: =item *
7289:
7290: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
7291:
7292: =item *
7293:
7294: devalidate($symb) : devalidate temporary spreadsheet calculations,
7295: forcing spreadsheet to reevaluate the resource scores next time.
7296:
7297: =back
7298:
7299: =head2 Storing/Retreiving Data
7300:
7301: =over 4
7302:
7303: =item *
7304:
7305: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
7306: for this url; hashref needs to be given and should be a \%hashname; the
7307: remaining args aren't required and if they aren't passed or are '' they will
7308: be derived from the env
7309:
7310: =item *
7311:
7312: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
7313: uses critical subroutine
7314:
7315: =item *
7316:
7317: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
7318: all args are optional
7319:
7320: =item *
7321:
7322: dumpstore($namespace,$udom,$uname,$regexp,$range) :
7323: dumps the complete (or key matching regexp) namespace into a hash
7324: ($udom, $uname, $regexp, $range are optional) for a namespace that is
7325: normally &store()ed into
7326:
7327: $range should be either an integer '100' (give me the first 100
7328: matching records)
7329: or be two integers sperated by a - with no spaces
7330: '30-50' (give me the 30th through the 50th matching
7331: records)
7332:
7333:
7334: =item *
7335:
7336: putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
7337: replaces a &store() version of data with a replacement set of data
7338: for a particular resource in a namespace passed in the $storehash hash
7339: reference
7340:
7341: =item *
7342:
7343: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
7344: works very similar to store/cstore, but all data is stored in a
7345: temporary location and can be reset using tmpreset, $storehash should
7346: be a hash reference, returns nothing on success
7347:
7348: =item *
7349:
7350: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
7351: similar to restore, but all data is stored in a temporary location and
7352: can be reset using tmpreset. Returns a hash of values on success,
7353: error string otherwise.
7354:
7355: =item *
7356:
7357: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
7358: deltes all keys for $symb form the temporary storage hash.
7359:
7360: =item *
7361:
7362: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7363: reference filled in from namesp ($udom and $uname are optional)
7364:
7365: =item *
7366:
7367: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
7368: namesp ($udom and $uname are optional)
7369:
7370: =item *
7371:
7372: dump($namespace,$udom,$uname,$regexp,$range) :
7373: dumps the complete (or key matching regexp) namespace into a hash
7374: ($udom, $uname, $regexp, $range are optional)
7375:
7376: $range should be either an integer '100' (give me the first 100
7377: matching records)
7378: or be two integers sperated by a - with no spaces
7379: '30-50' (give me the 30th through the 50th matching
7380: records)
7381: =item *
7382:
7383: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
7384: $store can be a scalar, an array reference, or if the amount to be
7385: incremented is > 1, a hash reference.
7386:
7387: ($udom and $uname are optional)
7388:
7389: =item *
7390:
7391: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
7392: ($udom and $uname are optional)
7393:
7394: =item *
7395:
7396: cput($namespace,$storehash,$udom,$uname) : critical put
7397: ($udom and $uname are optional)
7398:
7399: =item *
7400:
7401: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7402: reference filled in from namesp (encrypts the return communication)
7403: ($udom and $uname are optional)
7404:
7405: =item *
7406:
7407: log($udom,$name,$home,$message) : write to permanent log for user; use
7408: critical subroutine
7409:
7410: =back
7411:
7412: =head2 Network Status Functions
7413:
7414: =over 4
7415:
7416: =item *
7417:
7418: dirlist($uri) : return directory list based on URI
7419:
7420: =item *
7421:
7422: spareserver() : find server with least workload from spare.tab
7423:
7424: =back
7425:
7426: =head2 Apache Request
7427:
7428: =over 4
7429:
7430: =item *
7431:
7432: ssi($url,%hash) : server side include, does a complete request cycle on url to
7433: localhost, posts hash
7434:
7435: =back
7436:
7437: =head2 Data to String to Data
7438:
7439: =over 4
7440:
7441: =item *
7442:
7443: hash2str(%hash) : convert a hash into a string complete with escaping and '='
7444: and '&' separators, supports elements that are arrayrefs and hashrefs
7445:
7446: =item *
7447:
7448: hashref2str($hashref) : convert a hashref into a string complete with
7449: escaping and '=' and '&' separators, supports elements that are
7450: arrayrefs and hashrefs
7451:
7452: =item *
7453:
7454: arrayref2str($arrayref) : convert an arrayref into a string complete
7455: with escaping and '&' separators, supports elements that are arrayrefs
7456: and hashrefs
7457:
7458: =item *
7459:
7460: str2hash($string) : convert string to hash using unescaping and
7461: splitting on '=' and '&', supports elements that are arrayrefs and
7462: hashrefs
7463:
7464: =item *
7465:
7466: str2array($string) : convert string to hash using unescaping and
7467: splitting on '&', supports elements that are arrayrefs and hashrefs
7468:
7469: =back
7470:
7471: =head2 Logging Routines
7472:
7473: =over 4
7474:
7475: These routines allow one to make log messages in the lonnet.log and
7476: lonnet.perm logfiles.
7477:
7478: =item *
7479:
7480: logtouch() : make sure the logfile, lonnet.log, exists
7481:
7482: =item *
7483:
7484: logthis() : append message to the normal lonnet.log file, it gets
7485: preiodically rolled over and deleted.
7486:
7487: =item *
7488:
7489: logperm() : append a permanent message to lonnet.perm.log, this log
7490: file never gets deleted by any automated portion of the system, only
7491: messages of critical importance should go in here.
7492:
7493: =back
7494:
7495: =head2 General File Helper Routines
7496:
7497: =over 4
7498:
7499: =item *
7500:
7501: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
7502: (a) files in /uploaded
7503: (i) If a local copy of the file exists -
7504: compares modification date of local copy with last-modified date for
7505: definitive version stored on home server for course. If local copy is
7506: stale, requests a new version from the home server and stores it.
7507: If the original has been removed from the home server, then local copy
7508: is unlinked.
7509: (ii) If local copy does not exist -
7510: requests the file from the home server and stores it.
7511:
7512: If $caller is 'uploadrep':
7513: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
7514: for request for files originally uploaded via DOCS.
7515: - returns 'ok' if fresh local copy now available, -1 otherwise.
7516:
7517: Otherwise:
7518: This indicates a call from the content generation phase of the request.
7519: - returns the entire contents of the file or -1.
7520:
7521: (b) files in /res
7522: - returns the entire contents of a file or -1;
7523: it properly subscribes to and replicates the file if neccessary.
7524:
7525:
7526: =item *
7527:
7528: stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
7529: reference
7530:
7531: returns either a stat() list of data about the file or an empty list
7532: if the file doesn't exist or couldn't find out about it (connection
7533: problems or user unknown)
7534:
7535: =item *
7536:
7537: filelocation($dir,$file) : returns file system location of a file
7538: based on URI; meant to be "fairly clean" absolute reference, $dir is a
7539: directory that relative $file lookups are to looked in ($dir of /a/dir
7540: and a file of ../bob will become /a/bob)
7541:
7542: =item *
7543:
7544: hreflocation($dir,$file) : returns file system location or a URL; same as
7545: filelocation except for hrefs
7546:
7547: =item *
7548:
7549: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
7550:
7551: =back
7552:
7553: =head2 Usererfile file routines (/uploaded*)
7554:
7555: =over 4
7556:
7557: =item *
7558:
7559: userfileupload(): main rotine for putting a file in a user or course's
7560: filespace, arguments are,
7561:
7562: formname - required - this is the name of the element in $env where the
7563: filename, and the contents of the file to create/modifed exist
7564: the filename is in $env{'form.'.$formname.'.filename'} and the
7565: contents of the file is located in $env{'form.'.$formname}
7566: coursedoc - if true, store the file in the course of the active role
7567: of the current user
7568: subdir - required - subdirectory to put the file in under ../userfiles/
7569: if undefined, it will be placed in "unknown"
7570:
7571: (This routine calls clean_filename() to remove any dangerous
7572: characters from the filename, and then calls finuserfileupload() to
7573: complete the transaction)
7574:
7575: returns either the url of the uploaded file (/uploaded/....) if successful
7576: and /adm/notfound.html if unsuccessful
7577:
7578: =item *
7579:
7580: clean_filename(): routine for cleaing a filename up for storage in
7581: userfile space, argument is:
7582:
7583: filename - proposed filename
7584:
7585: returns: the new clean filename
7586:
7587: =item *
7588:
7589: finishuserfileupload(): routine that creaes and sends the file to
7590: userspace, probably shouldn't be called directly
7591:
7592: docuname: username or courseid of destination for the file
7593: docudom: domain of user/course of destination for the file
7594: formname: same as for userfileupload()
7595: fname: filename (inculding subdirectories) for the file
7596:
7597: returns either the url of the uploaded file (/uploaded/....) if successful
7598: and /adm/notfound.html if unsuccessful
7599:
7600: =item *
7601:
7602: renameuserfile(): renames an existing userfile to a new name
7603:
7604: Args:
7605: docuname: username or courseid of destination for the file
7606: docudom: domain of user/course of destination for the file
7607: old: current file name (including any subdirs under userfiles)
7608: new: desired file name (including any subdirs under userfiles)
7609:
7610: =item *
7611:
7612: mkdiruserfile(): creates a directory is a userfiles dir
7613:
7614: Args:
7615: docuname: username or courseid of destination for the file
7616: docudom: domain of user/course of destination for the file
7617: dir: dir to create (including any subdirs under userfiles)
7618:
7619: =item *
7620:
7621: removeuserfile(): removes a file that exists in userfiles
7622:
7623: Args:
7624: docuname: username or courseid of destination for the file
7625: docudom: domain of user/course of destination for the file
7626: fname: filname to delete (including any subdirs under userfiles)
7627:
7628: =item *
7629:
7630: removeuploadedurl(): convience function for removeuserfile()
7631:
7632: Args:
7633: url: a full /uploaded/... url to delete
7634:
7635: =back
7636:
7637: =head2 HTTP Helper Routines
7638:
7639: =over 4
7640:
7641: =item *
7642:
7643: escape() : unpack non-word characters into CGI-compatible hex codes
7644:
7645: =item *
7646:
7647: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
7648:
7649: =back
7650:
7651: =head1 PRIVATE SUBROUTINES
7652:
7653: =head2 Underlying communication routines (Shouldn't call)
7654:
7655: =over 4
7656:
7657: =item *
7658:
7659: subreply() : tries to pass a message to lonc, returns con_lost if incapable
7660:
7661: =item *
7662:
7663: reply() : uses subreply to send a message to remote machine, logs all failures
7664:
7665: =item *
7666:
7667: critical() : passes a critical message to another server; if cannot
7668: get through then place message in connection buffer directory and
7669: returns con_delayed, if incapable of saving message, returns
7670: con_failed
7671:
7672: =item *
7673:
7674: reconlonc() : tries to reconnect lonc client processes.
7675:
7676: =back
7677:
7678: =head2 Resource Access Logging
7679:
7680: =over 4
7681:
7682: =item *
7683:
7684: flushcourselogs() : flush (save) buffer logs and access logs
7685:
7686: =item *
7687:
7688: courselog($what) : save message for course in hash
7689:
7690: =item *
7691:
7692: courseacclog($what) : save message for course using &courselog(). Perform
7693: special processing for specific resource types (problems, exams, quizzes, etc).
7694:
7695: =item *
7696:
7697: goodbye() : flush course logs and log shutting down; it is called in srm.conf
7698: as a PerlChildExitHandler
7699:
7700: =back
7701:
7702: =head2 Other
7703:
7704: =over 4
7705:
7706: =item *
7707:
7708: symblist($mapname,%newhash) : update symbolic storage links
7709:
7710: =back
7711:
7712: =cut
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