1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.729 2006/04/18 18:11:16 www 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'.$$.'00000'.$logid;
94: return &Apache::lonnet::put('nohist_'.$hash_name,
95: {
96: $id.'_exe_uname' => $env{'user.name'},
97: $id.'_exe_udom' => $env{'user.domain'},
98: $id.'_exe_time' => time(),
99: $id.'_exe_ip' => $ENV{'REMOTE_ADDR'},
100: $id.'_delflag' => $delflag,
101: $id.'_logentry' => $storehash,
102: $id.'_uname' => $uname,
103: $id.'_udom' => $udom,
104: },
105: $env{'course.'.$env{'request.course.id'}.'.domain'},
106: $env{'course.'.$env{'request.course.id'}.'.num'}
107: );
108: }
109: }
110:
111: sub logtouch {
112: my $execdir=$perlvar{'lonDaemons'};
113: unless (-e "$execdir/logs/lonnet.log") {
114: open(my $fh,">>$execdir/logs/lonnet.log");
115: close $fh;
116: }
117: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
118: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
119: }
120:
121: sub logthis {
122: my $message=shift;
123: my $execdir=$perlvar{'lonDaemons'};
124: my $now=time;
125: my $local=localtime($now);
126: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
127: print $fh "$local ($$): $message\n";
128: close($fh);
129: }
130: return 1;
131: }
132:
133: sub logperm {
134: my $message=shift;
135: my $execdir=$perlvar{'lonDaemons'};
136: my $now=time;
137: my $local=localtime($now);
138: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
139: print $fh "$now:$message:$local\n";
140: close($fh);
141: }
142: return 1;
143: }
144:
145: # -------------------------------------------------- Non-critical communication
146: sub subreply {
147: my ($cmd,$server)=@_;
148: my $peerfile="$perlvar{'lonSockDir'}/".$hostname{$server};
149: #
150: # With loncnew process trimming, there's a timing hole between lonc server
151: # process exit and the master server picking up the listen on the AF_UNIX
152: # socket. In that time interval, a lock file will exist:
153:
154: my $lockfile=$peerfile.".lock";
155: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
156: sleep(1);
157: }
158: # At this point, either a loncnew parent is listening or an old lonc
159: # or loncnew child is listening so we can connect or everything's dead.
160: #
161: # We'll give the connection a few tries before abandoning it. If
162: # connection is not possible, we'll con_lost back to the client.
163: #
164: my $client;
165: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
166: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
167: Type => SOCK_STREAM,
168: Timeout => 10);
169: if($client) {
170: last; # Connected!
171: }
172: sleep(1); # Try again later if failed connection.
173: }
174: my $answer;
175: if ($client) {
176: print $client "sethost:$server:$cmd\n";
177: $answer=<$client>;
178: if (!$answer) { $answer="con_lost"; }
179: chomp($answer);
180: } else {
181: $answer = 'con_lost'; # Failed connection.
182: }
183: return $answer;
184: }
185:
186: sub reply {
187: my ($cmd,$server)=@_;
188: unless (defined($hostname{$server})) { return 'no_such_host'; }
189: my $answer=subreply($cmd,$server);
190: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
191: &logthis("<font color=\"blue\">WARNING:".
192: " $cmd to $server returned $answer</font>");
193: }
194: return $answer;
195: }
196:
197: # ----------------------------------------------------------- Send USR1 to lonc
198:
199: sub reconlonc {
200: my $peerfile=shift;
201: &logthis("Trying to reconnect for $peerfile");
202: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
203: if (open(my $fh,"<$loncfile")) {
204: my $loncpid=<$fh>;
205: chomp($loncpid);
206: if (kill 0 => $loncpid) {
207: &logthis("lonc at pid $loncpid responding, sending USR1");
208: kill USR1 => $loncpid;
209: sleep 1;
210: if (-e "$peerfile") { return; }
211: &logthis("$peerfile still not there, give it another try");
212: sleep 5;
213: if (-e "$peerfile") { return; }
214: &logthis(
215: "<font color=\"blue\">WARNING: $peerfile still not there, giving up</font>");
216: } else {
217: &logthis(
218: "<font color=\"blue\">WARNING:".
219: " lonc at pid $loncpid not responding, giving up</font>");
220: }
221: } else {
222: &logthis('<font color="blue">WARNING: lonc not running, giving up</font>');
223: }
224: }
225:
226: # ------------------------------------------------------ Critical communication
227:
228: sub critical {
229: my ($cmd,$server)=@_;
230: unless ($hostname{$server}) {
231: &logthis("<font color=\"blue\">WARNING:".
232: " Critical message to unknown server ($server)</font>");
233: return 'no_such_host';
234: }
235: my $answer=reply($cmd,$server);
236: if ($answer eq 'con_lost') {
237: &reconlonc("$perlvar{'lonSockDir'}/$server");
238: my $answer=reply($cmd,$server);
239: if ($answer eq 'con_lost') {
240: my $now=time;
241: my $middlename=$cmd;
242: $middlename=substr($middlename,0,16);
243: $middlename=~s/\W//g;
244: my $dfilename=
245: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
246: $dumpcount++;
247: {
248: my $dfh;
249: if (open($dfh,">$dfilename")) {
250: print $dfh "$cmd\n";
251: close($dfh);
252: }
253: }
254: sleep 2;
255: my $wcmd='';
256: {
257: my $dfh;
258: if (open($dfh,"<$dfilename")) {
259: $wcmd=<$dfh>;
260: close($dfh);
261: }
262: }
263: chomp($wcmd);
264: if ($wcmd eq $cmd) {
265: &logthis("<font color=\"blue\">WARNING: ".
266: "Connection buffer $dfilename: $cmd</font>");
267: &logperm("D:$server:$cmd");
268: return 'con_delayed';
269: } else {
270: &logthis("<font color=\"red\">CRITICAL:"
271: ." Critical connection failed: $server $cmd</font>");
272: &logperm("F:$server:$cmd");
273: return 'con_failed';
274: }
275: }
276: }
277: return $answer;
278: }
279:
280: # ------------------------------------------- Transfer profile into environment
281:
282: sub transfer_profile_to_env {
283: my ($lonidsdir,$handle)=@_;
284: if (!defined($lonidsdir)) {
285: $lonidsdir = $perlvar{'lonIDsDir'};
286: }
287: if (!defined($handle)) {
288: ($handle) = ($env{'user.environment'} =~m|/([^/]+)\.id$| );
289: }
290:
291: my @profile;
292: {
293: open(my $idf,"$lonidsdir/$handle.id");
294: flock($idf,LOCK_SH);
295: @profile=<$idf>;
296: close($idf);
297: }
298: my $envi;
299: my %Remove;
300: for ($envi=0;$envi<=$#profile;$envi++) {
301: chomp($profile[$envi]);
302: my ($envname,$envvalue)=split(/=/,$profile[$envi],2);
303: $envname=&unescape($envname);
304: $envvalue=&unescape($envvalue);
305: $env{$envname} = $envvalue;
306: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
307: if ($time < time-300) {
308: $Remove{$key}++;
309: }
310: }
311: }
312: $env{'user.environment'} = "$lonidsdir/$handle.id";
313: foreach my $expired_key (keys(%Remove)) {
314: &delenv($expired_key);
315: }
316: }
317:
318: # ---------------------------------------------------------- Append Environment
319:
320: sub appenv {
321: my %newenv=@_;
322: foreach my $key (keys(%newenv)) {
323: if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
324: &logthis("<font color=\"blue\">WARNING: ".
325: "Attempt to modify environment ".$key." to ".$newenv{$key}
326: .'</font>');
327: delete($newenv{$key});
328: } else {
329: $env{$key}=$newenv{$key};
330: }
331: }
332:
333: my $lockfh;
334: unless (open($lockfh,"$env{'user.environment'}")) {
335: return 'error: '.$!;
336: }
337: unless (flock($lockfh,LOCK_EX)) {
338: &logthis("<font color=\"blue\">WARNING: ".
339: 'Could not obtain exclusive lock in appenv: '.$!);
340: close($lockfh);
341: return 'error: '.$!;
342: }
343:
344: my @oldenv;
345: {
346: my $fh;
347: unless (open($fh,"$env{'user.environment'}")) {
348: return 'error: '.$!;
349: }
350: @oldenv=<$fh>;
351: close($fh);
352: }
353: for (my $i=0; $i<=$#oldenv; $i++) {
354: chomp($oldenv[$i]);
355: if ($oldenv[$i] ne '') {
356: my ($name,$value)=split(/=/,$oldenv[$i],2);
357: $name=&unescape($name);
358: $value=&unescape($value);
359: unless (defined($newenv{$name})) {
360: $newenv{$name}=$value;
361: }
362: }
363: }
364: {
365: my $fh;
366: unless (open($fh,">$env{'user.environment'}")) {
367: return 'error';
368: }
369: my $newname;
370: foreach $newname (keys %newenv) {
371: print $fh &escape($newname).'='.&escape($newenv{$newname})."\n";
372: }
373: close($fh);
374: }
375:
376: close($lockfh);
377: return 'ok';
378: }
379: # ----------------------------------------------------- Delete from Environment
380:
381: sub delenv {
382: my $delthis=shift;
383: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
384: &logthis("<font color=\"blue\">WARNING: ".
385: "Attempt to delete from environment ".$delthis);
386: return 'error';
387: }
388: my @oldenv;
389: {
390: my $fh;
391: unless (open($fh,"$env{'user.environment'}")) {
392: return 'error';
393: }
394: unless (flock($fh,LOCK_SH)) {
395: &logthis("<font color=\"blue\">WARNING: ".
396: 'Could not obtain shared lock in delenv: '.$!);
397: close($fh);
398: return 'error: '.$!;
399: }
400: @oldenv=<$fh>;
401: close($fh);
402: }
403: {
404: my $fh;
405: unless (open($fh,">$env{'user.environment'}")) {
406: return 'error';
407: }
408: unless (flock($fh,LOCK_EX)) {
409: &logthis("<font color=\"blue\">WARNING: ".
410: 'Could not obtain exclusive lock in delenv: '.$!);
411: close($fh);
412: return 'error: '.$!;
413: }
414: foreach my $cur_key (@oldenv) {
415: my $unescaped_cur_key = &unescape($cur_key);
416: if ($unescaped_cur_key=~/^$delthis/) {
417: my ($key) = split('=',$cur_key,2);
418: $key = &unescape($key);
419: delete($env{$key});
420: } else {
421: print $fh $cur_key;
422: }
423: }
424: close($fh);
425: }
426: return 'ok';
427: }
428:
429: # ------------------------------------------ Find out current server userload
430: # there is a copy in lond
431: sub userload {
432: my $numusers=0;
433: {
434: opendir(LONIDS,$perlvar{'lonIDsDir'});
435: my $filename;
436: my $curtime=time;
437: while ($filename=readdir(LONIDS)) {
438: if ($filename eq '.' || $filename eq '..') {next;}
439: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
440: if ($curtime-$mtime < 1800) { $numusers++; }
441: }
442: closedir(LONIDS);
443: }
444: my $userloadpercent=0;
445: my $maxuserload=$perlvar{'lonUserLoadLim'};
446: if ($maxuserload) {
447: $userloadpercent=100*$numusers/$maxuserload;
448: }
449: $userloadpercent=sprintf("%.2f",$userloadpercent);
450: return $userloadpercent;
451: }
452:
453: # ------------------------------------------ Fight off request when overloaded
454:
455: sub overloaderror {
456: my ($r,$checkserver)=@_;
457: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
458: my $loadavg;
459: if ($checkserver eq $perlvar{'lonHostID'}) {
460: open(my $loadfile,'/proc/loadavg');
461: $loadavg=<$loadfile>;
462: $loadavg =~ s/\s.*//g;
463: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
464: close($loadfile);
465: } else {
466: $loadavg=&reply('load',$checkserver);
467: }
468: my $overload=$loadavg-100;
469: if ($overload>0) {
470: $r->err_headers_out->{'Retry-After'}=$overload;
471: $r->log_error('Overload of '.$overload.' on '.$checkserver);
472: return 413;
473: }
474: return '';
475: }
476:
477: # ------------------------------ Find server with least workload from spare.tab
478:
479: sub spareserver {
480: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
481: my $tryserver;
482: my $spareserver='';
483: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
484: my $lowestserver=$loadpercent > $userloadpercent?
485: $loadpercent : $userloadpercent;
486: foreach $tryserver (keys(%spareid)) {
487: my $loadans=&reply('load',$tryserver);
488: my $userloadans=&reply('userload',$tryserver);
489: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
490: next; #didn't get a number from the server
491: }
492: my $answer;
493: if ($loadans =~ /\d/) {
494: if ($userloadans =~ /\d/) {
495: #both are numbers, pick the bigger one
496: $answer=$loadans > $userloadans?
497: $loadans : $userloadans;
498: } else {
499: $answer = $loadans;
500: }
501: } else {
502: $answer = $userloadans;
503: }
504: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
505: if ($want_server_name) {
506: $spareserver=$tryserver;
507: } else {
508: $spareserver="http://$hostname{$tryserver}";
509: }
510: $lowestserver=$answer;
511: }
512: }
513: return $spareserver;
514: }
515:
516: # --------------------------------------------- Try to change a user's password
517:
518: sub changepass {
519: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
520: $currentpass = &escape($currentpass);
521: $newpass = &escape($newpass);
522: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
523: $server);
524: if (! $answer) {
525: &logthis("No reply on password change request to $server ".
526: "by $uname in domain $udom.");
527: } elsif ($answer =~ "^ok") {
528: &logthis("$uname in $udom successfully changed their password ".
529: "on $server.");
530: } elsif ($answer =~ "^pwchange_failure") {
531: &logthis("$uname in $udom was unable to change their password ".
532: "on $server. The action was blocked by either lcpasswd ".
533: "or pwchange");
534: } elsif ($answer =~ "^non_authorized") {
535: &logthis("$uname in $udom did not get their password correct when ".
536: "attempting to change it on $server.");
537: } elsif ($answer =~ "^auth_mode_error") {
538: &logthis("$uname in $udom attempted to change their password despite ".
539: "not being locally or internally authenticated on $server.");
540: } elsif ($answer =~ "^unknown_user") {
541: &logthis("$uname in $udom attempted to change their password ".
542: "on $server but were unable to because $server is not ".
543: "their home server.");
544: } elsif ($answer =~ "^refused") {
545: &logthis("$server refused to change $uname in $udom password because ".
546: "it was sent an unencrypted request to change the password.");
547: }
548: return $answer;
549: }
550:
551: # ----------------------- Try to determine user's current authentication scheme
552:
553: sub queryauthenticate {
554: my ($uname,$udom)=@_;
555: my $uhome=&homeserver($uname,$udom);
556: if (!$uhome) {
557: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
558: return 'no_host';
559: }
560: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
561: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
562: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
563: }
564: return $answer;
565: }
566:
567: # --------- Try to authenticate user from domain's lib servers (first this one)
568:
569: sub authenticate {
570: my ($uname,$upass,$udom)=@_;
571: $upass=escape($upass);
572: $uname=~s/\W//g;
573: my $uhome=&homeserver($uname,$udom);
574: if (!$uhome) {
575: &logthis("User $uname at $udom is unknown in authenticate");
576: return 'no_host';
577: }
578: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
579: if ($answer eq 'authorized') {
580: &logthis("User $uname at $udom authorized by $uhome");
581: return $uhome;
582: }
583: if ($answer eq 'non_authorized') {
584: &logthis("User $uname at $udom rejected by $uhome");
585: return 'no_host';
586: }
587: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
588: return 'no_host';
589: }
590:
591: # ---------------------- Find the homebase for a user from domain's lib servers
592:
593: my %homecache;
594: sub homeserver {
595: my ($uname,$udom,$ignoreBadCache)=@_;
596: my $index="$uname:$udom";
597:
598: if (exists($homecache{$index})) { return $homecache{$index}; }
599: my $tryserver;
600: foreach $tryserver (keys %libserv) {
601: next if ($ignoreBadCache ne 'true' &&
602: exists($badServerCache{$tryserver}));
603: if ($hostdom{$tryserver} eq $udom) {
604: my $answer=reply("home:$udom:$uname",$tryserver);
605: if ($answer eq 'found') {
606: return $homecache{$index}=$tryserver;
607: } elsif ($answer eq 'no_host') {
608: $badServerCache{$tryserver}=1;
609: }
610: }
611: }
612: return 'no_host';
613: }
614:
615: # ------------------------------------- Find the usernames behind a list of IDs
616:
617: sub idget {
618: my ($udom,@ids)=@_;
619: my %returnhash=();
620:
621: my $tryserver;
622: foreach $tryserver (keys %libserv) {
623: if ($hostdom{$tryserver} eq $udom) {
624: my $idlist=join('&',@ids);
625: $idlist=~tr/A-Z/a-z/;
626: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
627: my @answer=();
628: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
629: @answer=split(/\&/,$reply);
630: } ;
631: my $i;
632: for ($i=0;$i<=$#ids;$i++) {
633: if ($answer[$i]) {
634: $returnhash{$ids[$i]}=$answer[$i];
635: }
636: }
637: }
638: }
639: return %returnhash;
640: }
641:
642: # ------------------------------------- Find the IDs behind a list of usernames
643:
644: sub idrget {
645: my ($udom,@unames)=@_;
646: my %returnhash=();
647: foreach (@unames) {
648: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
649: }
650: return %returnhash;
651: }
652:
653: # ------------------------------- Store away a list of names and associated IDs
654:
655: sub idput {
656: my ($udom,%ids)=@_;
657: my %servers=();
658: foreach (keys %ids) {
659: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
660: my $uhom=&homeserver($_,$udom);
661: if ($uhom ne 'no_host') {
662: my $id=&escape($ids{$_});
663: $id=~tr/A-Z/a-z/;
664: my $unam=&escape($_);
665: if ($servers{$uhom}) {
666: $servers{$uhom}.='&'.$id.'='.$unam;
667: } else {
668: $servers{$uhom}=$id.'='.$unam;
669: }
670: }
671: }
672: foreach (keys %servers) {
673: &critical('idput:'.$udom.':'.$servers{$_},$_);
674: }
675: }
676:
677: # --------------------------------------------------- Assign a key to a student
678:
679: sub assign_access_key {
680: #
681: # a valid key looks like uname:udom#comments
682: # comments are being appended
683: #
684: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
685: $kdom=
686: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
687: $knum=
688: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
689: $cdom=
690: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
691: $cnum=
692: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
693: $udom=$env{'user.name'} unless (defined($udom));
694: $uname=$env{'user.domain'} unless (defined($uname));
695: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
696: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
697: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
698: # assigned to this person
699: # - this should not happen,
700: # unless something went wrong
701: # the first time around
702: # ready to assign
703: $logentry=$1.'; '.$logentry;
704: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
705: $kdom,$knum) eq 'ok') {
706: # key now belongs to user
707: my $envkey='key.'.$cdom.'_'.$cnum;
708: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
709: &appenv('environment.'.$envkey => $ckey);
710: return 'ok';
711: } else {
712: return
713: 'error: Count not permanently assign key, will need to be re-entered later.';
714: }
715: } else {
716: return 'error: Could not assign key, try again later.';
717: }
718: } elsif (!$existing{$ckey}) {
719: # the key does not exist
720: return 'error: The key does not exist';
721: } else {
722: # the key is somebody else's
723: return 'error: The key is already in use';
724: }
725: }
726:
727: # ------------------------------------------ put an additional comment on a key
728:
729: sub comment_access_key {
730: #
731: # a valid key looks like uname:udom#comments
732: # comments are being appended
733: #
734: my ($ckey,$cdom,$cnum,$logentry)=@_;
735: $cdom=
736: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
737: $cnum=
738: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
739: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
740: if ($existing{$ckey}) {
741: $existing{$ckey}.='; '.$logentry;
742: # ready to assign
743: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
744: $cdom,$cnum) eq 'ok') {
745: return 'ok';
746: } else {
747: return 'error: Count not store comment.';
748: }
749: } else {
750: # the key does not exist
751: return 'error: The key does not exist';
752: }
753: }
754:
755: # ------------------------------------------------------ Generate a set of keys
756:
757: sub generate_access_keys {
758: my ($number,$cdom,$cnum,$logentry)=@_;
759: $cdom=
760: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
761: $cnum=
762: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
763: unless (&allowed('mky',$cdom)) { return 0; }
764: unless (($cdom) && ($cnum)) { return 0; }
765: if ($number>10000) { return 0; }
766: sleep(2); # make sure don't get same seed twice
767: srand(time()^($$+($$<<15))); # from "Programming Perl"
768: my $total=0;
769: for (my $i=1;$i<=$number;$i++) {
770: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
771: sprintf("%lx",int(100000*rand)).'-'.
772: sprintf("%lx",int(100000*rand));
773: $newkey=~s/1/g/g; # folks mix up 1 and l
774: $newkey=~s/0/h/g; # and also 0 and O
775: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
776: if ($existing{$newkey}) {
777: $i--;
778: } else {
779: if (&put('accesskeys',
780: { $newkey => '# generated '.localtime().
781: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
782: '; '.$logentry },
783: $cdom,$cnum) eq 'ok') {
784: $total++;
785: }
786: }
787: }
788: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
789: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
790: return $total;
791: }
792:
793: # ------------------------------------------------------- Validate an accesskey
794:
795: sub validate_access_key {
796: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
797: $cdom=
798: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
799: $cnum=
800: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
801: $udom=$env{'user.domain'} unless (defined($udom));
802: $uname=$env{'user.name'} unless (defined($uname));
803: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
804: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
805: }
806:
807: # ------------------------------------- Find the section of student in a course
808: sub devalidate_getsection_cache {
809: my ($udom,$unam,$courseid)=@_;
810: $courseid=~s/\_/\//g;
811: $courseid=~s/^(\w)/\/$1/;
812: my $hashid="$udom:$unam:$courseid";
813: &devalidate_cache_new('getsection',$hashid);
814: }
815:
816: sub getsection {
817: my ($udom,$unam,$courseid)=@_;
818: my $cachetime=1800;
819: $courseid=~s/\_/\//g;
820: $courseid=~s/^(\w)/\/$1/;
821:
822: my $hashid="$udom:$unam:$courseid";
823: my ($result,$cached)=&is_cached_new('getsection',$hashid);
824: if (defined($cached)) { return $result; }
825:
826: my %Pending;
827: my %Expired;
828: #
829: # Each role can either have not started yet (pending), be active,
830: # or have expired.
831: #
832: # If there is an active role, we are done.
833: #
834: # If there is more than one role which has not started yet,
835: # choose the one which will start sooner
836: # If there is one role which has not started yet, return it.
837: #
838: # If there is more than one expired role, choose the one which ended last.
839: # If there is a role which has expired, return it.
840: #
841: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
842: &homeserver($unam,$udom)))) {
843: my ($key,$value)=split(/\=/,$_);
844: $key=&unescape($key);
845: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
846: my $section=$1;
847: if ($key eq $courseid.'_st') { $section=''; }
848: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
849: my $now=time;
850: if (defined($end) && $end && ($now > $end)) {
851: $Expired{$end}=$section;
852: next;
853: }
854: if (defined($start) && $start && ($now < $start)) {
855: $Pending{$start}=$section;
856: next;
857: }
858: return &do_cache_new('getsection',$hashid,$section,$cachetime);
859: }
860: #
861: # Presumedly there will be few matching roles from the above
862: # loop and the sorting time will be negligible.
863: if (scalar(keys(%Pending))) {
864: my ($time) = sort {$a <=> $b} keys(%Pending);
865: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
866: }
867: if (scalar(keys(%Expired))) {
868: my @sorted = sort {$a <=> $b} keys(%Expired);
869: my $time = pop(@sorted);
870: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
871: }
872: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
873: }
874:
875: sub save_cache {
876: &purge_remembered();
877: #&Apache::loncommon::validate_page();
878: undef(%env);
879: }
880:
881: my $to_remember=-1;
882: my %remembered;
883: my %accessed;
884: my $kicks=0;
885: my $hits=0;
886: sub devalidate_cache_new {
887: my ($name,$id,$debug) = @_;
888: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
889: $id=&escape($name.':'.$id);
890: $memcache->delete($id);
891: delete($remembered{$id});
892: delete($accessed{$id});
893: }
894:
895: sub is_cached_new {
896: my ($name,$id,$debug) = @_;
897: $id=&escape($name.':'.$id);
898: if (exists($remembered{$id})) {
899: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
900: $accessed{$id}=[&gettimeofday()];
901: $hits++;
902: return ($remembered{$id},1);
903: }
904: my $value = $memcache->get($id);
905: if (!(defined($value))) {
906: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
907: return (undef,undef);
908: }
909: if ($value eq '__undef__') {
910: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
911: $value=undef;
912: }
913: &make_room($id,$value,$debug);
914: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
915: return ($value,1);
916: }
917:
918: sub do_cache_new {
919: my ($name,$id,$value,$time,$debug) = @_;
920: $id=&escape($name.':'.$id);
921: my $setvalue=$value;
922: if (!defined($setvalue)) {
923: $setvalue='__undef__';
924: }
925: if (!defined($time) ) {
926: $time=600;
927: }
928: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
929: $memcache->set($id,$setvalue,$time);
930: # need to make a copy of $value
931: #&make_room($id,$value,$debug);
932: return $value;
933: }
934:
935: sub make_room {
936: my ($id,$value,$debug)=@_;
937: $remembered{$id}=$value;
938: if ($to_remember<0) { return; }
939: $accessed{$id}=[&gettimeofday()];
940: if (scalar(keys(%remembered)) <= $to_remember) { return; }
941: my $to_kick;
942: my $max_time=0;
943: foreach my $other (keys(%accessed)) {
944: if (&tv_interval($accessed{$other}) > $max_time) {
945: $to_kick=$other;
946: $max_time=&tv_interval($accessed{$other});
947: }
948: }
949: delete($remembered{$to_kick});
950: delete($accessed{$to_kick});
951: $kicks++;
952: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
953: return;
954: }
955:
956: sub purge_remembered {
957: #&logthis("Tossing ".scalar(keys(%remembered)));
958: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
959: undef(%remembered);
960: undef(%accessed);
961: }
962: # ------------------------------------- Read an entry from a user's environment
963:
964: sub userenvironment {
965: my ($udom,$unam,@what)=@_;
966: my %returnhash=();
967: my @answer=split(/\&/,
968: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
969: &homeserver($unam,$udom)));
970: my $i;
971: for ($i=0;$i<=$#what;$i++) {
972: $returnhash{$what[$i]}=&unescape($answer[$i]);
973: }
974: return %returnhash;
975: }
976:
977: # ---------------------------------------------------------- Get a studentphoto
978: sub studentphoto {
979: my ($udom,$unam,$ext) = @_;
980: my $home=&Apache::lonnet::homeserver($unam,$udom);
981: if (defined($env{'request.course.id'})) {
982: if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
983: if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
984: return(&retrievestudentphoto($udom,$unam,$ext));
985: } else {
986: my ($result,$perm_reqd)=
987: &Apache::lonnet::auto_photo_permission($unam,$udom);
988: if ($result eq 'ok') {
989: if (!($perm_reqd eq 'yes')) {
990: return(&retrievestudentphoto($udom,$unam,$ext));
991: }
992: }
993: }
994: }
995: } else {
996: my ($result,$perm_reqd) =
997: &Apache::lonnet::auto_photo_permission($unam,$udom);
998: if ($result eq 'ok') {
999: if (!($perm_reqd eq 'yes')) {
1000: return(&retrievestudentphoto($udom,$unam,$ext));
1001: }
1002: }
1003: }
1004: return '/adm/lonKaputt/lonlogo_broken.gif';
1005: }
1006:
1007: sub retrievestudentphoto {
1008: my ($udom,$unam,$ext,$type) = @_;
1009: my $home=&Apache::lonnet::homeserver($unam,$udom);
1010: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
1011: if ($ret eq 'ok') {
1012: my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
1013: if ($type eq 'thumbnail') {
1014: $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
1015: }
1016: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
1017: return $tokenurl;
1018: } else {
1019: if ($type eq 'thumbnail') {
1020: return '/adm/lonKaputt/genericstudent_tn.gif';
1021: } else {
1022: return '/adm/lonKaputt/lonlogo_broken.gif';
1023: }
1024: }
1025: }
1026:
1027: # -------------------------------------------------------------------- New chat
1028:
1029: sub chatsend {
1030: my ($newentry,$anon,$group)=@_;
1031: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1032: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1033: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1034: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1035: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
1036: &escape($newentry)).':'.$group,$chome);
1037: }
1038:
1039: # ------------------------------------------ Find current version of a resource
1040:
1041: sub getversion {
1042: my $fname=&clutter(shift);
1043: unless ($fname=~/^\/res\//) { return -1; }
1044: return ¤tversion(&filelocation('',$fname));
1045: }
1046:
1047: sub currentversion {
1048: my $fname=shift;
1049: my ($result,$cached)=&is_cached_new('resversion',$fname);
1050: if (defined($cached)) { return $result; }
1051: my $author=$fname;
1052: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1053: my ($udom,$uname)=split(/\//,$author);
1054: my $home=homeserver($uname,$udom);
1055: if ($home eq 'no_host') {
1056: return -1;
1057: }
1058: my $answer=reply("currentversion:$fname",$home);
1059: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1060: return -1;
1061: }
1062: return &do_cache_new('resversion',$fname,$answer,600);
1063: }
1064:
1065: # ----------------------------- Subscribe to a resource, return URL if possible
1066:
1067: sub subscribe {
1068: my $fname=shift;
1069: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1070: $fname=~s/[\n\r]//g;
1071: my $author=$fname;
1072: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1073: my ($udom,$uname)=split(/\//,$author);
1074: my $home=homeserver($uname,$udom);
1075: if ($home eq 'no_host') {
1076: return 'not_found';
1077: }
1078: my $answer=reply("sub:$fname",$home);
1079: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1080: $answer.=' by '.$home;
1081: }
1082: return $answer;
1083: }
1084:
1085: # -------------------------------------------------------------- Replicate file
1086:
1087: sub repcopy {
1088: my $filename=shift;
1089: $filename=~s/\/+/\//g;
1090: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1091: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1092: if ($filename=~m|^/home/httpd/html/userfiles/| or
1093: $filename=~m -^/*(uploaded|editupload)/-) {
1094: return &repcopy_userfile($filename);
1095: }
1096: $filename=~s/[\n\r]//g;
1097: my $transname="$filename.in.transfer";
1098: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1099: my $remoteurl=subscribe($filename);
1100: if ($remoteurl =~ /^con_lost by/) {
1101: &logthis("Subscribe returned $remoteurl: $filename");
1102: return 'unavailable';
1103: } elsif ($remoteurl eq 'not_found') {
1104: #&logthis("Subscribe returned not_found: $filename");
1105: return 'not_found';
1106: } elsif ($remoteurl =~ /^rejected by/) {
1107: &logthis("Subscribe returned $remoteurl: $filename");
1108: return 'forbidden';
1109: } elsif ($remoteurl eq 'directory') {
1110: return 'ok';
1111: } else {
1112: my $author=$filename;
1113: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1114: my ($udom,$uname)=split(/\//,$author);
1115: my $home=homeserver($uname,$udom);
1116: unless ($home eq $perlvar{'lonHostID'}) {
1117: my @parts=split(/\//,$filename);
1118: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1119: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1120: &logthis("Malconfiguration for replication: $filename");
1121: return 'bad_request';
1122: }
1123: my $count;
1124: for ($count=5;$count<$#parts;$count++) {
1125: $path.="/$parts[$count]";
1126: if ((-e $path)!=1) {
1127: mkdir($path,0777);
1128: }
1129: }
1130: my $ua=new LWP::UserAgent;
1131: my $request=new HTTP::Request('GET',"$remoteurl");
1132: my $response=$ua->request($request,$transname);
1133: if ($response->is_error()) {
1134: unlink($transname);
1135: my $message=$response->status_line;
1136: &logthis("<font color=\"blue\">WARNING:"
1137: ." LWP get: $message: $filename</font>");
1138: return 'unavailable';
1139: } else {
1140: if ($remoteurl!~/\.meta$/) {
1141: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1142: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1143: if ($mresponse->is_error()) {
1144: unlink($filename.'.meta');
1145: &logthis(
1146: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1147: }
1148: }
1149: rename($transname,$filename);
1150: return 'ok';
1151: }
1152: }
1153: }
1154: }
1155:
1156: # ------------------------------------------------ Get server side include body
1157: sub ssi_body {
1158: my ($filelink,%form)=@_;
1159: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1160: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1161: }
1162: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1163: &ssi($filelink,%form));
1164: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs;
1165: $output=~s/^.*?\<body[^\>]*\>//si;
1166: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1167: return $output;
1168: }
1169:
1170: # --------------------------------------------------------- Server Side Include
1171:
1172: sub ssi {
1173:
1174: my ($fn,%form)=@_;
1175:
1176: my $ua=new LWP::UserAgent;
1177:
1178: my $request;
1179:
1180: $form{'no_update_last_known'}=1;
1181:
1182: if (%form) {
1183: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1184: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1185: } else {
1186: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1187: }
1188:
1189: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1190: my $response=$ua->request($request);
1191:
1192: return $response->content;
1193: }
1194:
1195: sub externalssi {
1196: my ($url)=@_;
1197: my $ua=new LWP::UserAgent;
1198: my $request=new HTTP::Request('GET',$url);
1199: my $response=$ua->request($request);
1200: return $response->content;
1201: }
1202:
1203: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1204:
1205: sub allowuploaded {
1206: my ($srcurl,$url)=@_;
1207: $url=&clutter(&declutter($url));
1208: my $dir=$url;
1209: $dir=~s/\/[^\/]+$//;
1210: my %httpref=();
1211: my $httpurl=&hreflocation('',$url);
1212: $httpref{'httpref.'.$httpurl}=$srcurl;
1213: &Apache::lonnet::appenv(%httpref);
1214: }
1215:
1216: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1217: # input: action, courseID, current domain, intended
1218: # path to file, source of file, instruction to parse file for objects,
1219: # ref to hash for embedded objects,
1220: # ref to hash for codebase of java objects.
1221: #
1222: # output: url to file (if action was uploaddoc),
1223: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1224: #
1225: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1226: # course.
1227: #
1228: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1229: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1230: # course's home server.
1231: #
1232: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1233: # be copied from $source (current location) to
1234: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1235: # and will then be copied to
1236: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1237: # course's home server.
1238: #
1239: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1240: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1241: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1242: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1243: # in course's home server.
1244: #
1245:
1246: sub process_coursefile {
1247: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1248: my $fetchresult;
1249: my $home=&homeserver($docuname,$docudom);
1250: if ($action eq 'propagate') {
1251: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1252: $home);
1253: } else {
1254: my $fpath = '';
1255: my $fname = $file;
1256: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1257: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1258: my $filepath = &build_filepath($fpath);
1259: if ($action eq 'copy') {
1260: if ($source eq '') {
1261: $fetchresult = 'no source file';
1262: return $fetchresult;
1263: } else {
1264: my $destination = $filepath.'/'.$fname;
1265: rename($source,$destination);
1266: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1267: $home);
1268: }
1269: } elsif ($action eq 'uploaddoc') {
1270: open(my $fh,'>'.$filepath.'/'.$fname);
1271: print $fh $env{'form.'.$source};
1272: close($fh);
1273: if ($parser eq 'parse') {
1274: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1275: unless ($parse_result eq 'ok') {
1276: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1277: }
1278: }
1279: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1280: $home);
1281: if ($fetchresult eq 'ok') {
1282: return '/uploaded/'.$fpath.'/'.$fname;
1283: } else {
1284: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1285: ' to host '.$home.': '.$fetchresult);
1286: return '/adm/notfound.html';
1287: }
1288: }
1289: }
1290: unless ( $fetchresult eq 'ok') {
1291: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1292: ' to host '.$home.': '.$fetchresult);
1293: }
1294: return $fetchresult;
1295: }
1296:
1297: sub build_filepath {
1298: my ($fpath) = @_;
1299: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1300: unless ($fpath eq '') {
1301: my @parts=split('/',$fpath);
1302: foreach my $part (@parts) {
1303: $filepath.= '/'.$part;
1304: if ((-e $filepath)!=1) {
1305: mkdir($filepath,0777);
1306: }
1307: }
1308: }
1309: return $filepath;
1310: }
1311:
1312: sub store_edited_file {
1313: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1314: my $file = $primary_url;
1315: $file =~ s#^/uploaded/$docudom/$docuname/##;
1316: my $fpath = '';
1317: my $fname = $file;
1318: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1319: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1320: my $filepath = &build_filepath($fpath);
1321: open(my $fh,'>'.$filepath.'/'.$fname);
1322: print $fh $content;
1323: close($fh);
1324: my $home=&homeserver($docuname,$docudom);
1325: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1326: $home);
1327: if ($$fetchresult eq 'ok') {
1328: return '/uploaded/'.$fpath.'/'.$fname;
1329: } else {
1330: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1331: ' to host '.$home.': '.$$fetchresult);
1332: return '/adm/notfound.html';
1333: }
1334: }
1335:
1336: sub clean_filename {
1337: my ($fname)=@_;
1338: # Replace Windows backslashes by forward slashes
1339: $fname=~s/\\/\//g;
1340: # Get rid of everything but the actual filename
1341: $fname=~s/^.*\/([^\/]+)$/$1/;
1342: # Replace spaces by underscores
1343: $fname=~s/\s+/\_/g;
1344: # Replace all other weird characters by nothing
1345: $fname=~s/[^\w\.\-]//g;
1346: # Replace all .\d. sequences with _\d. so they no longer look like version
1347: # numbers
1348: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1349: return $fname;
1350: }
1351:
1352: # --------------- Take an uploaded file and put it into the userfiles directory
1353: # input: $formname - the contents of the file are in $env{"form.$formname"}
1354: # the desired filenam is in $env{"form.$formname.filename"}
1355: # $coursedoc - if true up to the current course
1356: # if false
1357: # $subdir - directory in userfile to store the file into
1358: # $parser, $allfiles, $codebase - unknown
1359: #
1360: # output: url of file in userspace, or error: <message>
1361: # or /adm/notfound.html if failure to upload occurse
1362:
1363:
1364: sub userfileupload {
1365: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,$destudom)=@_;
1366: if (!defined($subdir)) { $subdir='unknown'; }
1367: my $fname=$env{'form.'.$formname.'.filename'};
1368: $fname=&clean_filename($fname);
1369: # See if there is anything left
1370: unless ($fname) { return 'error: no uploaded file'; }
1371: chop($env{'form.'.$formname});
1372: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1373: my $now = time;
1374: my $filepath = 'tmp/helprequests/'.$now;
1375: my @parts=split(/\//,$filepath);
1376: my $fullpath = $perlvar{'lonDaemons'};
1377: for (my $i=0;$i<@parts;$i++) {
1378: $fullpath .= '/'.$parts[$i];
1379: if ((-e $fullpath)!=1) {
1380: mkdir($fullpath,0777);
1381: }
1382: }
1383: open(my $fh,'>'.$fullpath.'/'.$fname);
1384: print $fh $env{'form.'.$formname};
1385: close($fh);
1386: return $fullpath.'/'.$fname;
1387: }
1388:
1389: # Create the directory if not present
1390: $fname="$subdir/$fname";
1391: if ($coursedoc) {
1392: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1393: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1394: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1395: return &finishuserfileupload($docuname,$docudom,
1396: $formname,$fname,$parser,$allfiles,
1397: $codebase);
1398: } else {
1399: $fname=$env{'form.folder'}.'/'.$fname;
1400: return &process_coursefile('uploaddoc',$docuname,$docudom,
1401: $fname,$formname,$parser,
1402: $allfiles,$codebase);
1403: }
1404: } elsif (defined($destuname)) {
1405: my $docuname=$destuname;
1406: my $docudom=$destudom;
1407: return &finishuserfileupload($docuname,$docudom,$formname,
1408: $fname,$parser,$allfiles,$codebase);
1409:
1410: } else {
1411: my $docuname=$env{'user.name'};
1412: my $docudom=$env{'user.domain'};
1413: if (exists($env{'form.group'})) {
1414: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1415: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1416: }
1417: return &finishuserfileupload($docuname,$docudom,$formname,
1418: $fname,$parser,$allfiles,$codebase);
1419: }
1420: }
1421:
1422: sub finishuserfileupload {
1423: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
1424: my $path=$docudom.'/'.$docuname.'/';
1425: my $filepath=$perlvar{'lonDocRoot'};
1426: my ($fnamepath,$file);
1427: $file=$fname;
1428: if ($fname=~m|/|) {
1429: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1430: $path.=$fnamepath.'/';
1431: }
1432: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1433: my $count;
1434: for ($count=4;$count<=$#parts;$count++) {
1435: $filepath.="/$parts[$count]";
1436: if ((-e $filepath)!=1) {
1437: mkdir($filepath,0777);
1438: }
1439: }
1440: # Save the file
1441: {
1442: if (!open(FH,'>'.$filepath.'/'.$file)) {
1443: &logthis('Failed to create '.$filepath.'/'.$file);
1444: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1445: return '/adm/notfound.html';
1446: }
1447: if (!print FH ($env{'form.'.$formname})) {
1448: &logthis('Failed to write to '.$filepath.'/'.$file);
1449: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1450: return '/adm/notfound.html';
1451: }
1452: close(FH);
1453: }
1454: if ($parser eq 'parse') {
1455: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1456: $codebase);
1457: unless ($parse_result eq 'ok') {
1458: &logthis('Failed to parse '.$filepath.$file.
1459: ' for embedded media: '.$parse_result);
1460: }
1461: }
1462: # Notify homeserver to grep it
1463: #
1464: my $docuhome=&homeserver($docuname,$docudom);
1465: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1466: if ($fetchresult eq 'ok') {
1467: #
1468: # Return the URL to it
1469: return '/uploaded/'.$path.$file;
1470: } else {
1471: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1472: ': '.$fetchresult);
1473: return '/adm/notfound.html';
1474: }
1475: }
1476:
1477: sub extract_embedded_items {
1478: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1479: my @state = ();
1480: my %javafiles = (
1481: codebase => '',
1482: code => '',
1483: archive => ''
1484: );
1485: my %mediafiles = (
1486: src => '',
1487: movie => '',
1488: );
1489: my $p;
1490: if ($content) {
1491: $p = HTML::LCParser->new($content);
1492: } else {
1493: $p = HTML::LCParser->new($filepath.'/'.$file);
1494: }
1495: while (my $t=$p->get_token()) {
1496: if ($t->[0] eq 'S') {
1497: my ($tagname, $attr) = ($t->[1],$t->[2]);
1498: push (@state, $tagname);
1499: if (lc($tagname) eq 'allow') {
1500: &add_filetype($allfiles,$attr->{'src'},'src');
1501: }
1502: if (lc($tagname) eq 'img') {
1503: &add_filetype($allfiles,$attr->{'src'},'src');
1504: }
1505: if (lc($tagname) eq 'script') {
1506: if ($attr->{'archive'} =~ /\.jar$/i) {
1507: &add_filetype($allfiles,$attr->{'archive'},'archive');
1508: } else {
1509: &add_filetype($allfiles,$attr->{'src'},'src');
1510: }
1511: }
1512: if (lc($tagname) eq 'link') {
1513: if (lc($attr->{'rel'}) eq 'stylesheet') {
1514: &add_filetype($allfiles,$attr->{'href'},'href');
1515: }
1516: }
1517: if (lc($tagname) eq 'object' ||
1518: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1519: foreach my $item (keys(%javafiles)) {
1520: $javafiles{$item} = '';
1521: }
1522: }
1523: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1524: my $name = lc($attr->{'name'});
1525: foreach my $item (keys(%javafiles)) {
1526: if ($name eq $item) {
1527: $javafiles{$item} = $attr->{'value'};
1528: last;
1529: }
1530: }
1531: foreach my $item (keys(%mediafiles)) {
1532: if ($name eq $item) {
1533: &add_filetype($allfiles, $attr->{'value'}, 'value');
1534: last;
1535: }
1536: }
1537: }
1538: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1539: foreach my $item (keys(%javafiles)) {
1540: if ($attr->{$item}) {
1541: $javafiles{$item} = $attr->{$item};
1542: last;
1543: }
1544: }
1545: foreach my $item (keys(%mediafiles)) {
1546: if ($attr->{$item}) {
1547: &add_filetype($allfiles,$attr->{$item},$item);
1548: last;
1549: }
1550: }
1551: }
1552: } elsif ($t->[0] eq 'E') {
1553: my ($tagname) = ($t->[1]);
1554: if ($javafiles{'codebase'} ne '') {
1555: $javafiles{'codebase'} .= '/';
1556: }
1557: if (lc($tagname) eq 'applet' ||
1558: lc($tagname) eq 'object' ||
1559: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1560: ) {
1561: foreach my $item (keys(%javafiles)) {
1562: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1563: my $file=$javafiles{'codebase'}.$javafiles{$item};
1564: &add_filetype($allfiles,$file,$item);
1565: }
1566: }
1567: }
1568: pop @state;
1569: }
1570: }
1571: return 'ok';
1572: }
1573:
1574: sub add_filetype {
1575: my ($allfiles,$file,$type)=@_;
1576: if (exists($allfiles->{$file})) {
1577: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1578: push(@{$allfiles->{$file}}, &escape($type));
1579: }
1580: } else {
1581: @{$allfiles->{$file}} = (&escape($type));
1582: }
1583: }
1584:
1585: sub removeuploadedurl {
1586: my ($url)=@_;
1587: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1588: return &removeuserfile($uname,$udom,$fname);
1589: }
1590:
1591: sub removeuserfile {
1592: my ($docuname,$docudom,$fname)=@_;
1593: my $home=&homeserver($docuname,$docudom);
1594: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1595: }
1596:
1597: sub mkdiruserfile {
1598: my ($docuname,$docudom,$dir)=@_;
1599: my $home=&homeserver($docuname,$docudom);
1600: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1601: }
1602:
1603: sub renameuserfile {
1604: my ($docuname,$docudom,$old,$new)=@_;
1605: my $home=&homeserver($docuname,$docudom);
1606: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1607: &escape("$new"),$home);
1608: }
1609:
1610: # ------------------------------------------------------------------------- Log
1611:
1612: sub log {
1613: my ($dom,$nam,$hom,$what)=@_;
1614: return critical("log:$dom:$nam:$what",$hom);
1615: }
1616:
1617: # ------------------------------------------------------------------ Course Log
1618: #
1619: # This routine flushes several buffers of non-mission-critical nature
1620: #
1621:
1622: sub flushcourselogs {
1623: &logthis('Flushing log buffers');
1624: #
1625: # course logs
1626: # This is a log of all transactions in a course, which can be used
1627: # for data mining purposes
1628: #
1629: # It also collects the courseid database, which lists last transaction
1630: # times and course titles for all courseids
1631: #
1632: my %courseidbuffer=();
1633: foreach (keys %courselogs) {
1634: my $crsid=$_;
1635: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1636: &escape($courselogs{$crsid}),
1637: $coursehombuf{$crsid}) eq 'ok') {
1638: delete $courselogs{$crsid};
1639: } else {
1640: &logthis('Failed to flush log buffer for '.$crsid);
1641: if (length($courselogs{$crsid})>40000) {
1642: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
1643: " exceeded maximum size, deleting.</font>");
1644: delete $courselogs{$crsid};
1645: }
1646: }
1647: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1648: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1649: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1650: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1651: } else {
1652: $courseidbuffer{$coursehombuf{$crsid}}=
1653: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1654: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1655: }
1656: }
1657: #
1658: # Write course id database (reverse lookup) to homeserver of courses
1659: # Is used in pickcourse
1660: #
1661: foreach (keys %courseidbuffer) {
1662: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1663: }
1664: #
1665: # File accesses
1666: # Writes to the dynamic metadata of resources to get hit counts, etc.
1667: #
1668: foreach my $entry (keys(%accesshash)) {
1669: if ($entry =~ /___count$/) {
1670: my ($dom,$name);
1671: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1672: if (! defined($dom) || $dom eq '' ||
1673: ! defined($name) || $name eq '') {
1674: my $cid = $env{'request.course.id'};
1675: $dom = $env{'request.'.$cid.'.domain'};
1676: $name = $env{'request.'.$cid.'.num'};
1677: }
1678: my $value = $accesshash{$entry};
1679: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1680: my %temphash=($url => $value);
1681: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1682: if ($result eq 'ok') {
1683: delete $accesshash{$entry};
1684: } elsif ($result eq 'unknown_cmd') {
1685: # Target server has old code running on it.
1686: my %temphash=($entry => $value);
1687: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1688: delete $accesshash{$entry};
1689: }
1690: }
1691: } else {
1692: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1693: my %temphash=($entry => $accesshash{$entry});
1694: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1695: delete $accesshash{$entry};
1696: }
1697: }
1698: }
1699: #
1700: # Roles
1701: # Reverse lookup of user roles for course faculty/staff and co-authorship
1702: #
1703: foreach (keys %userrolehash) {
1704: my $entry=$_;
1705: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1706: split(/\:/,$entry);
1707: if (&Apache::lonnet::put('nohist_userroles',
1708: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1709: $rudom,$runame) eq 'ok') {
1710: delete $userrolehash{$entry};
1711: }
1712: }
1713: #
1714: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1715: #
1716: my %domrolebuffer = ();
1717: foreach my $entry (keys %domainrolehash) {
1718: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1719: if ($domrolebuffer{$rudom}) {
1720: $domrolebuffer{$rudom}.='&'.&escape($entry).
1721: '='.&escape($domainrolehash{$entry});
1722: } else {
1723: $domrolebuffer{$rudom}.=&escape($entry).
1724: '='.&escape($domainrolehash{$entry});
1725: }
1726: delete $domainrolehash{$entry};
1727: }
1728: foreach my $dom (keys(%domrolebuffer)) {
1729: foreach my $tryserver (keys %libserv) {
1730: if ($hostdom{$tryserver} eq $dom) {
1731: unless (&reply('domroleput:'.$dom.':'.
1732: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1733: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1734: }
1735: }
1736: }
1737: }
1738: $dumpcount++;
1739: }
1740:
1741: sub courselog {
1742: my $what=shift;
1743: $what=time.':'.$what;
1744: unless ($env{'request.course.id'}) { return ''; }
1745: $coursedombuf{$env{'request.course.id'}}=
1746: $env{'course.'.$env{'request.course.id'}.'.domain'};
1747: $coursenumbuf{$env{'request.course.id'}}=
1748: $env{'course.'.$env{'request.course.id'}.'.num'};
1749: $coursehombuf{$env{'request.course.id'}}=
1750: $env{'course.'.$env{'request.course.id'}.'.home'};
1751: $coursedescrbuf{$env{'request.course.id'}}=
1752: $env{'course.'.$env{'request.course.id'}.'.description'};
1753: $courseinstcodebuf{$env{'request.course.id'}}=
1754: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1755: $courseownerbuf{$env{'request.course.id'}}=
1756: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1757: if (defined $courselogs{$env{'request.course.id'}}) {
1758: $courselogs{$env{'request.course.id'}}.='&'.$what;
1759: } else {
1760: $courselogs{$env{'request.course.id'}}.=$what;
1761: }
1762: if (length($courselogs{$env{'request.course.id'}})>4048) {
1763: &flushcourselogs();
1764: }
1765: }
1766:
1767: sub courseacclog {
1768: my $fnsymb=shift;
1769: unless ($env{'request.course.id'}) { return ''; }
1770: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1771: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1772: $what.=':POST';
1773: # FIXME: Probably ought to escape things....
1774: foreach (keys %env) {
1775: if ($_=~/^form\.(.*)/) {
1776: $what.=':'.$1.'='.$env{$_};
1777: }
1778: }
1779: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1780: # FIXME: We should not be depending on a form parameter that someone
1781: # editing lonsearchcat.pm might change in the future.
1782: if ($env{'form.phase'} eq 'course_search') {
1783: $what.= ':POST';
1784: # FIXME: Probably ought to escape things....
1785: foreach my $element ('courseexp','crsfulltext','crsrelated',
1786: 'crsdiscuss') {
1787: $what.=':'.$element.'='.$env{'form.'.$element};
1788: }
1789: }
1790: }
1791: &courselog($what);
1792: }
1793:
1794: sub countacc {
1795: my $url=&declutter(shift);
1796: return if (! defined($url) || $url eq '');
1797: unless ($env{'request.course.id'}) { return ''; }
1798: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1799: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1800: $accesshash{$key}++;
1801: }
1802:
1803: sub linklog {
1804: my ($from,$to)=@_;
1805: $from=&declutter($from);
1806: $to=&declutter($to);
1807: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1808: $accesshash{$to.'___'.$from.'___goto'}=1;
1809: }
1810:
1811: sub userrolelog {
1812: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1813: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
1814: ($trole=~/^in/) || ($trole=~/^cc/) ||
1815: ($trole=~/^ep/) || ($trole=~/^cr/) ||
1816: ($trole=~/^ta/)) {
1817: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1818: $userrolehash
1819: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1820: =$tend.':'.$tstart;
1821: }
1822: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
1823: ($trole=~/^li/) || ($trole=~/^li/) ||
1824: ($trole=~/^au/) || ($trole=~/^dg/) ||
1825: ($trole=~/^sc/)) {
1826: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1827: $domainrolehash
1828: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1829: = $tend.':'.$tstart;
1830: }
1831: }
1832:
1833: sub get_course_adv_roles {
1834: my $cid=shift;
1835: $cid=$env{'request.course.id'} unless (defined($cid));
1836: my %coursehash=&coursedescription($cid);
1837: my %nothide=();
1838: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1839: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1840: }
1841: my %returnhash=();
1842: my %dumphash=
1843: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1844: my $now=time;
1845: foreach (keys %dumphash) {
1846: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1847: if (($tstart) && ($tstart<0)) { next; }
1848: if (($tend) && ($tend<$now)) { next; }
1849: if (($tstart) && ($now<$tstart)) { next; }
1850: my ($role,$username,$domain,$section)=split(/\:/,$_);
1851: if ($username eq '' || $domain eq '') { next; }
1852: if ((&privileged($username,$domain)) &&
1853: (!$nothide{$username.':'.$domain})) { next; }
1854: if ($role eq 'cr') { next; }
1855: my $key=&plaintext($role);
1856: if ($role =~ /^cr/) {
1857: $key=(split('/',$role))[3];
1858: }
1859: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1860: if ($returnhash{$key}) {
1861: $returnhash{$key}.=','.$username.':'.$domain;
1862: } else {
1863: $returnhash{$key}=$username.':'.$domain;
1864: }
1865: }
1866: return %returnhash;
1867: }
1868:
1869: sub get_my_roles {
1870: my ($uname,$udom)=@_;
1871: unless (defined($uname)) { $uname=$env{'user.name'}; }
1872: unless (defined($udom)) { $udom=$env{'user.domain'}; }
1873: my %dumphash=
1874: &dump('nohist_userroles',$udom,$uname);
1875: my %returnhash=();
1876: my $now=time;
1877: foreach (keys %dumphash) {
1878: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1879: if (($tstart) && ($tstart<0)) { next; }
1880: if (($tend) && ($tend<$now)) { next; }
1881: if (($tstart) && ($now<$tstart)) { next; }
1882: my ($role,$username,$domain,$section)=split(/\:/,$_);
1883: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1884: }
1885: return %returnhash;
1886: }
1887:
1888: # ----------------------------------------------------- Frontpage Announcements
1889: #
1890: #
1891:
1892: sub postannounce {
1893: my ($server,$text)=@_;
1894: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1895: unless ($text=~/\w/) { $text=''; }
1896: return &reply('setannounce:'.&escape($text),$server);
1897: }
1898:
1899: sub getannounce {
1900:
1901: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1902: my $announcement='';
1903: while (<$fh>) { $announcement .=$_; }
1904: close($fh);
1905: if ($announcement=~/\w/) {
1906: return
1907: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1908: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1909: } else {
1910: return '';
1911: }
1912: } else {
1913: return '';
1914: }
1915: }
1916:
1917: # ---------------------------------------------------------- Course ID routines
1918: # Deal with domain's nohist_courseid.db files
1919: #
1920:
1921: sub courseidput {
1922: my ($domain,$what,$coursehome)=@_;
1923: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1924: }
1925:
1926: sub courseiddump {
1927: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref)=@_;
1928: my %returnhash=();
1929: unless ($domfilter) { $domfilter=''; }
1930: foreach my $tryserver (keys %libserv) {
1931: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1932: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1933: foreach (
1934: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1935: $sincefilter.':'.&escape($descfilter).':'.
1936: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter),
1937: $tryserver))) {
1938: my ($key,$value)=split(/\=/,$_);
1939: if (($key) && ($value)) {
1940: $returnhash{&unescape($key)}=$value;
1941: }
1942: }
1943: }
1944: }
1945: }
1946: return %returnhash;
1947: }
1948:
1949: # ---------------------------------------------------------- DC e-mail
1950:
1951: sub dcmailput {
1952: my ($domain,$msgid,$message,$server)=@_;
1953: my $status = &Apache::lonnet::critical(
1954: 'dcmailput:'.$domain.':'.&Apache::lonnet::escape($msgid).'='.
1955: &Apache::lonnet::escape($message),$server);
1956: return $status;
1957: }
1958:
1959: sub dcmaildump {
1960: my ($dom,$startdate,$enddate,$senders) = @_;
1961: my %returnhash=();
1962: if (exists($domain_primary{$dom})) {
1963: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
1964: &escape($enddate).':';
1965: my @esc_senders=map { &escape($_)} @$senders;
1966: $cmd.=&escape(join('&',@esc_senders));
1967: foreach (split(/\&/,&reply($cmd,$domain_primary{$dom}))) {
1968: my ($key,$value) = split(/\=/,$_);
1969: if (($key) && ($value)) {
1970: $returnhash{&unescape($key)} = &unescape($value);
1971: }
1972: }
1973: }
1974: return %returnhash;
1975: }
1976: # ---------------------------------------------------------- Domain roles
1977:
1978: sub get_domain_roles {
1979: my ($dom,$roles,$startdate,$enddate)=@_;
1980: if (undef($startdate) || $startdate eq '') {
1981: $startdate = '.';
1982: }
1983: if (undef($enddate) || $enddate eq '') {
1984: $enddate = '.';
1985: }
1986: my $rolelist = join(':',@{$roles});
1987: my %personnel = ();
1988: foreach my $tryserver (keys(%libserv)) {
1989: if ($hostdom{$tryserver} eq $dom) {
1990: %{$personnel{$tryserver}}=();
1991: foreach (
1992: split(/\&/,&reply('domrolesdump:'.$dom.':'.
1993: &escape($startdate).':'.&escape($enddate).':'.
1994: &escape($rolelist), $tryserver))) {
1995: my($key,$value) = split(/\=/,$_);
1996: if (($key) && ($value)) {
1997: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
1998: }
1999: }
2000: }
2001: }
2002: return %personnel;
2003: }
2004:
2005: # ----------------------------------------------------------- Check out an item
2006:
2007: sub get_first_access {
2008: my ($type,$argsymb)=@_;
2009: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2010: if ($argsymb) { $symb=$argsymb; }
2011: my ($map,$id,$res)=&decode_symb($symb);
2012: if ($type eq 'map') {
2013: $res=&symbread($map);
2014: } else {
2015: $res=$symb;
2016: }
2017: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
2018: return $times{"$courseid\0$res"};
2019: }
2020:
2021: sub set_first_access {
2022: my ($type)=@_;
2023: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2024: my ($map,$id,$res)=&decode_symb($symb);
2025: if ($type eq 'map') {
2026: $res=&symbread($map);
2027: } else {
2028: $res=$symb;
2029: }
2030: my $firstaccess=&get_first_access($type,$symb);
2031: if (!$firstaccess) {
2032: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
2033: }
2034: return 'already_set';
2035: }
2036:
2037: sub checkout {
2038: my ($symb,$tuname,$tudom,$tcrsid)=@_;
2039: my $now=time;
2040: my $lonhost=$perlvar{'lonHostID'};
2041: my $infostr=&escape(
2042: 'CHECKOUTTOKEN&'.
2043: $tuname.'&'.
2044: $tudom.'&'.
2045: $tcrsid.'&'.
2046: $symb.'&'.
2047: $now.'&'.$ENV{'REMOTE_ADDR'});
2048: my $token=&reply('tmpput:'.$infostr,$lonhost);
2049: if ($token=~/^error\:/) {
2050: &logthis("<font color=\"blue\">WARNING: ".
2051: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
2052: "</font>");
2053: return '';
2054: }
2055:
2056: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
2057: $token=~tr/a-z/A-Z/;
2058:
2059: my %infohash=('resource.0.outtoken' => $token,
2060: 'resource.0.checkouttime' => $now,
2061: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
2062:
2063: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2064: return '';
2065: } else {
2066: &logthis("<font color=\"blue\">WARNING: ".
2067: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
2068: "</font>");
2069: }
2070:
2071: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2072: &escape('Checkout '.$infostr.' - '.
2073: $token)) ne 'ok') {
2074: return '';
2075: } else {
2076: &logthis("<font color=\"blue\">WARNING: ".
2077: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
2078: "</font>");
2079: }
2080: return $token;
2081: }
2082:
2083: # ------------------------------------------------------------ Check in an item
2084:
2085: sub checkin {
2086: my $token=shift;
2087: my $now=time;
2088: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2089: $lonhost=~tr/A-Z/a-z/;
2090: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
2091: $dtoken=~s/\W/\_/g;
2092: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2093: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2094:
2095: unless (($tuname) && ($tudom)) {
2096: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2097: return '';
2098: }
2099:
2100: unless (&allowed('mgr',$tcrsid)) {
2101: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2102: $env{'user.name'}.' - '.$env{'user.domain'});
2103: return '';
2104: }
2105:
2106: my %infohash=('resource.0.intoken' => $token,
2107: 'resource.0.checkintime' => $now,
2108: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2109:
2110: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2111: return '';
2112: }
2113:
2114: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2115: &escape('Checkin - '.$token)) ne 'ok') {
2116: return '';
2117: }
2118:
2119: return ($symb,$tuname,$tudom,$tcrsid);
2120: }
2121:
2122: # --------------------------------------------- Set Expire Date for Spreadsheet
2123:
2124: sub expirespread {
2125: my ($uname,$udom,$stype,$usymb)=@_;
2126: my $cid=$env{'request.course.id'};
2127: if ($cid) {
2128: my $now=time;
2129: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2130: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2131: $env{'course.'.$cid.'.num'}.
2132: ':nohist_expirationdates:'.
2133: &escape($key).'='.$now,
2134: $env{'course.'.$cid.'.home'})
2135: }
2136: return 'ok';
2137: }
2138:
2139: # ----------------------------------------------------- Devalidate Spreadsheets
2140:
2141: sub devalidate {
2142: my ($symb,$uname,$udom)=@_;
2143: my $cid=$env{'request.course.id'};
2144: if ($cid) {
2145: # delete the stored spreadsheets for
2146: # - the student level sheet of this user in course's homespace
2147: # - the assessment level sheet for this resource
2148: # for this user in user's homespace
2149: # - current conditional state info
2150: my $key=$uname.':'.$udom.':';
2151: my $status=
2152: &del('nohist_calculatedsheets',
2153: [$key.'studentcalc:'],
2154: $env{'course.'.$cid.'.domain'},
2155: $env{'course.'.$cid.'.num'})
2156: .' '.
2157: &del('nohist_calculatedsheets_'.$cid,
2158: [$key.'assesscalc:'.$symb],$udom,$uname);
2159: unless ($status eq 'ok ok') {
2160: &logthis('Could not devalidate spreadsheet '.
2161: $uname.' at '.$udom.' for '.
2162: $symb.': '.$status);
2163: }
2164: &delenv('user.state.'.$cid);
2165: }
2166: }
2167:
2168: sub get_scalar {
2169: my ($string,$end) = @_;
2170: my $value;
2171: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2172: $value = $1;
2173: } elsif ($$string =~ s/^([^&]*?)&//) {
2174: $value = $1;
2175: }
2176: return &unescape($value);
2177: }
2178:
2179: sub array2str {
2180: my (@array) = @_;
2181: my $result=&arrayref2str(\@array);
2182: $result=~s/^__ARRAY_REF__//;
2183: $result=~s/__END_ARRAY_REF__$//;
2184: return $result;
2185: }
2186:
2187: sub arrayref2str {
2188: my ($arrayref) = @_;
2189: my $result='__ARRAY_REF__';
2190: foreach my $elem (@$arrayref) {
2191: if(ref($elem) eq 'ARRAY') {
2192: $result.=&arrayref2str($elem).'&';
2193: } elsif(ref($elem) eq 'HASH') {
2194: $result.=&hashref2str($elem).'&';
2195: } elsif(ref($elem)) {
2196: #print("Got a ref of ".(ref($elem))." skipping.");
2197: } else {
2198: $result.=&escape($elem).'&';
2199: }
2200: }
2201: $result=~s/\&$//;
2202: $result .= '__END_ARRAY_REF__';
2203: return $result;
2204: }
2205:
2206: sub hash2str {
2207: my (%hash) = @_;
2208: my $result=&hashref2str(\%hash);
2209: $result=~s/^__HASH_REF__//;
2210: $result=~s/__END_HASH_REF__$//;
2211: return $result;
2212: }
2213:
2214: sub hashref2str {
2215: my ($hashref)=@_;
2216: my $result='__HASH_REF__';
2217: foreach (sort(keys(%$hashref))) {
2218: if (ref($_) eq 'ARRAY') {
2219: $result.=&arrayref2str($_).'=';
2220: } elsif (ref($_) eq 'HASH') {
2221: $result.=&hashref2str($_).'=';
2222: } elsif (ref($_)) {
2223: $result.='=';
2224: #print("Got a ref of ".(ref($_))." skipping.");
2225: } else {
2226: if ($_) {$result.=&escape($_).'=';} else { last; }
2227: }
2228:
2229: if(ref($hashref->{$_}) eq 'ARRAY') {
2230: $result.=&arrayref2str($hashref->{$_}).'&';
2231: } elsif(ref($hashref->{$_}) eq 'HASH') {
2232: $result.=&hashref2str($hashref->{$_}).'&';
2233: } elsif(ref($hashref->{$_})) {
2234: $result.='&';
2235: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
2236: } else {
2237: $result.=&escape($hashref->{$_}).'&';
2238: }
2239: }
2240: $result=~s/\&$//;
2241: $result .= '__END_HASH_REF__';
2242: return $result;
2243: }
2244:
2245: sub str2hash {
2246: my ($string)=@_;
2247: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2248: return %$hash;
2249: }
2250:
2251: sub str2hashref {
2252: my ($string) = @_;
2253:
2254: my %hash;
2255:
2256: if($string !~ /^__HASH_REF__/) {
2257: if (! ($string eq '' || !defined($string))) {
2258: $hash{'error'}='Not hash reference';
2259: }
2260: return (\%hash, $string);
2261: }
2262:
2263: $string =~ s/^__HASH_REF__//;
2264:
2265: while($string !~ /^__END_HASH_REF__/) {
2266: #key
2267: my $key='';
2268: if($string =~ /^__HASH_REF__/) {
2269: ($key, $string)=&str2hashref($string);
2270: if(defined($key->{'error'})) {
2271: $hash{'error'}='Bad data';
2272: return (\%hash, $string);
2273: }
2274: } elsif($string =~ /^__ARRAY_REF__/) {
2275: ($key, $string)=&str2arrayref($string);
2276: if($key->[0] eq 'Array reference error') {
2277: $hash{'error'}='Bad data';
2278: return (\%hash, $string);
2279: }
2280: } else {
2281: $string =~ s/^(.*?)=//;
2282: $key=&unescape($1);
2283: }
2284: $string =~ s/^=//;
2285:
2286: #value
2287: my $value='';
2288: if($string =~ /^__HASH_REF__/) {
2289: ($value, $string)=&str2hashref($string);
2290: if(defined($value->{'error'})) {
2291: $hash{'error'}='Bad data';
2292: return (\%hash, $string);
2293: }
2294: } elsif($string =~ /^__ARRAY_REF__/) {
2295: ($value, $string)=&str2arrayref($string);
2296: if($value->[0] eq 'Array reference error') {
2297: $hash{'error'}='Bad data';
2298: return (\%hash, $string);
2299: }
2300: } else {
2301: $value=&get_scalar(\$string,'__END_HASH_REF__');
2302: }
2303: $string =~ s/^&//;
2304:
2305: $hash{$key}=$value;
2306: }
2307:
2308: $string =~ s/^__END_HASH_REF__//;
2309:
2310: return (\%hash, $string);
2311: }
2312:
2313: sub str2array {
2314: my ($string)=@_;
2315: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2316: return @$array;
2317: }
2318:
2319: sub str2arrayref {
2320: my ($string) = @_;
2321: my @array;
2322:
2323: if($string !~ /^__ARRAY_REF__/) {
2324: if (! ($string eq '' || !defined($string))) {
2325: $array[0]='Array reference error';
2326: }
2327: return (\@array, $string);
2328: }
2329:
2330: $string =~ s/^__ARRAY_REF__//;
2331:
2332: while($string !~ /^__END_ARRAY_REF__/) {
2333: my $value='';
2334: if($string =~ /^__HASH_REF__/) {
2335: ($value, $string)=&str2hashref($string);
2336: if(defined($value->{'error'})) {
2337: $array[0] ='Array reference error';
2338: return (\@array, $string);
2339: }
2340: } elsif($string =~ /^__ARRAY_REF__/) {
2341: ($value, $string)=&str2arrayref($string);
2342: if($value->[0] eq 'Array reference error') {
2343: $array[0] ='Array reference error';
2344: return (\@array, $string);
2345: }
2346: } else {
2347: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2348: }
2349: $string =~ s/^&//;
2350:
2351: push(@array, $value);
2352: }
2353:
2354: $string =~ s/^__END_ARRAY_REF__//;
2355:
2356: return (\@array, $string);
2357: }
2358:
2359: # -------------------------------------------------------------------Temp Store
2360:
2361: sub tmpreset {
2362: my ($symb,$namespace,$domain,$stuname) = @_;
2363: if (!$symb) {
2364: $symb=&symbread();
2365: if (!$symb) { $symb= $env{'request.url'}; }
2366: }
2367: $symb=escape($symb);
2368:
2369: if (!$namespace) { $namespace=$env{'request.state'}; }
2370: $namespace=~s/\//\_/g;
2371: $namespace=~s/\W//g;
2372:
2373: if (!$domain) { $domain=$env{'user.domain'}; }
2374: if (!$stuname) { $stuname=$env{'user.name'}; }
2375: if ($domain eq 'public' && $stuname eq 'public') {
2376: $stuname=$ENV{'REMOTE_ADDR'};
2377: }
2378: my $path=$perlvar{'lonDaemons'}.'/tmp';
2379: my %hash;
2380: if (tie(%hash,'GDBM_File',
2381: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2382: &GDBM_WRCREAT(),0640)) {
2383: foreach my $key (keys %hash) {
2384: if ($key=~ /:$symb/) {
2385: delete($hash{$key});
2386: }
2387: }
2388: }
2389: }
2390:
2391: sub tmpstore {
2392: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2393:
2394: if (!$symb) {
2395: $symb=&symbread();
2396: if (!$symb) { $symb= $env{'request.url'}; }
2397: }
2398: $symb=escape($symb);
2399:
2400: if (!$namespace) {
2401: # I don't think we would ever want to store this for a course.
2402: # it seems this will only be used if we don't have a course.
2403: #$namespace=$env{'request.course.id'};
2404: #if (!$namespace) {
2405: $namespace=$env{'request.state'};
2406: #}
2407: }
2408: $namespace=~s/\//\_/g;
2409: $namespace=~s/\W//g;
2410: if (!$domain) { $domain=$env{'user.domain'}; }
2411: if (!$stuname) { $stuname=$env{'user.name'}; }
2412: if ($domain eq 'public' && $stuname eq 'public') {
2413: $stuname=$ENV{'REMOTE_ADDR'};
2414: }
2415: my $now=time;
2416: my %hash;
2417: my $path=$perlvar{'lonDaemons'}.'/tmp';
2418: if (tie(%hash,'GDBM_File',
2419: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2420: &GDBM_WRCREAT(),0640)) {
2421: $hash{"version:$symb"}++;
2422: my $version=$hash{"version:$symb"};
2423: my $allkeys='';
2424: foreach my $key (keys(%$storehash)) {
2425: $allkeys.=$key.':';
2426: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2427: }
2428: $hash{"$version:$symb:timestamp"}=$now;
2429: $allkeys.='timestamp';
2430: $hash{"$version:keys:$symb"}=$allkeys;
2431: if (untie(%hash)) {
2432: return 'ok';
2433: } else {
2434: return "error:$!";
2435: }
2436: } else {
2437: return "error:$!";
2438: }
2439: }
2440:
2441: # -----------------------------------------------------------------Temp Restore
2442:
2443: sub tmprestore {
2444: my ($symb,$namespace,$domain,$stuname) = @_;
2445:
2446: if (!$symb) {
2447: $symb=&symbread();
2448: if (!$symb) { $symb= $env{'request.url'}; }
2449: }
2450: $symb=escape($symb);
2451:
2452: if (!$namespace) { $namespace=$env{'request.state'}; }
2453:
2454: if (!$domain) { $domain=$env{'user.domain'}; }
2455: if (!$stuname) { $stuname=$env{'user.name'}; }
2456: if ($domain eq 'public' && $stuname eq 'public') {
2457: $stuname=$ENV{'REMOTE_ADDR'};
2458: }
2459: my %returnhash;
2460: $namespace=~s/\//\_/g;
2461: $namespace=~s/\W//g;
2462: my %hash;
2463: my $path=$perlvar{'lonDaemons'}.'/tmp';
2464: if (tie(%hash,'GDBM_File',
2465: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2466: &GDBM_READER(),0640)) {
2467: my $version=$hash{"version:$symb"};
2468: $returnhash{'version'}=$version;
2469: my $scope;
2470: for ($scope=1;$scope<=$version;$scope++) {
2471: my $vkeys=$hash{"$scope:keys:$symb"};
2472: my @keys=split(/:/,$vkeys);
2473: my $key;
2474: $returnhash{"$scope:keys"}=$vkeys;
2475: foreach $key (@keys) {
2476: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2477: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2478: }
2479: }
2480: if (!(untie(%hash))) {
2481: return "error:$!";
2482: }
2483: } else {
2484: return "error:$!";
2485: }
2486: return %returnhash;
2487: }
2488:
2489: # ----------------------------------------------------------------------- Store
2490:
2491: sub store {
2492: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2493: my $home='';
2494:
2495: if ($stuname) { $home=&homeserver($stuname,$domain); }
2496:
2497: $symb=&symbclean($symb);
2498: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2499:
2500: if (!$domain) { $domain=$env{'user.domain'}; }
2501: if (!$stuname) { $stuname=$env{'user.name'}; }
2502:
2503: &devalidate($symb,$stuname,$domain);
2504:
2505: $symb=escape($symb);
2506: if (!$namespace) {
2507: unless ($namespace=$env{'request.course.id'}) {
2508: return '';
2509: }
2510: }
2511: if (!$home) { $home=$env{'user.home'}; }
2512:
2513: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2514: $$storehash{'host'}=$perlvar{'lonHostID'};
2515:
2516: my $namevalue='';
2517: foreach (keys %$storehash) {
2518: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2519: }
2520: $namevalue=~s/\&$//;
2521: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2522: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2523: }
2524:
2525: # -------------------------------------------------------------- Critical Store
2526:
2527: sub cstore {
2528: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2529: my $home='';
2530:
2531: if ($stuname) { $home=&homeserver($stuname,$domain); }
2532:
2533: $symb=&symbclean($symb);
2534: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2535:
2536: if (!$domain) { $domain=$env{'user.domain'}; }
2537: if (!$stuname) { $stuname=$env{'user.name'}; }
2538:
2539: &devalidate($symb,$stuname,$domain);
2540:
2541: $symb=escape($symb);
2542: if (!$namespace) {
2543: unless ($namespace=$env{'request.course.id'}) {
2544: return '';
2545: }
2546: }
2547: if (!$home) { $home=$env{'user.home'}; }
2548:
2549: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2550: $$storehash{'host'}=$perlvar{'lonHostID'};
2551:
2552: my $namevalue='';
2553: foreach (keys %$storehash) {
2554: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2555: }
2556: $namevalue=~s/\&$//;
2557: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2558: return critical
2559: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2560: }
2561:
2562: # --------------------------------------------------------------------- Restore
2563:
2564: sub restore {
2565: my ($symb,$namespace,$domain,$stuname) = @_;
2566: my $home='';
2567:
2568: if ($stuname) { $home=&homeserver($stuname,$domain); }
2569:
2570: if (!$symb) {
2571: unless ($symb=escape(&symbread())) { return ''; }
2572: } else {
2573: $symb=&escape(&symbclean($symb));
2574: }
2575: if (!$namespace) {
2576: unless ($namespace=$env{'request.course.id'}) {
2577: return '';
2578: }
2579: }
2580: if (!$domain) { $domain=$env{'user.domain'}; }
2581: if (!$stuname) { $stuname=$env{'user.name'}; }
2582: if (!$home) { $home=$env{'user.home'}; }
2583: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2584:
2585: my %returnhash=();
2586: foreach (split(/\&/,$answer)) {
2587: my ($name,$value)=split(/\=/,$_);
2588: $returnhash{&unescape($name)}=&thaw_unescape($value);
2589: }
2590: my $version;
2591: for ($version=1;$version<=$returnhash{'version'};$version++) {
2592: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2593: $returnhash{$_}=$returnhash{$version.':'.$_};
2594: }
2595: }
2596: return %returnhash;
2597: }
2598:
2599: # ---------------------------------------------------------- Course Description
2600:
2601: sub coursedescription {
2602: my $courseid=shift;
2603: $courseid=~s/^\///;
2604: $courseid=~s/\_/\//g;
2605: my ($cdomain,$cnum)=split(/\//,$courseid);
2606: my $chome=&homeserver($cnum,$cdomain);
2607: my $normalid=$cdomain.'_'.$cnum;
2608: # need to always cache even if we get errors otherwise we keep
2609: # trying and trying and trying to get the course description.
2610: my %envhash=();
2611: my %returnhash=();
2612: $envhash{'course.'.$normalid.'.last_cache'}=time;
2613: if ($chome ne 'no_host') {
2614: %returnhash=&dump('environment',$cdomain,$cnum);
2615: if (!exists($returnhash{'con_lost'})) {
2616: $returnhash{'home'}= $chome;
2617: $returnhash{'domain'} = $cdomain;
2618: $returnhash{'num'} = $cnum;
2619: while (my ($name,$value) = each %returnhash) {
2620: $envhash{'course.'.$normalid.'.'.$name}=$value;
2621: }
2622: $returnhash{'url'}=&clutter($returnhash{'url'});
2623: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2624: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2625: $envhash{'course.'.$normalid.'.home'}=$chome;
2626: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2627: $envhash{'course.'.$normalid.'.num'}=$cnum;
2628: }
2629: }
2630: &appenv(%envhash);
2631: return %returnhash;
2632: }
2633:
2634: # -------------------------------------------------See if a user is privileged
2635:
2636: sub privileged {
2637: my ($username,$domain)=@_;
2638: my $rolesdump=&reply("dump:$domain:$username:roles",
2639: &homeserver($username,$domain));
2640: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2641: my $now=time;
2642: if ($rolesdump ne '') {
2643: foreach (split(/&/,$rolesdump)) {
2644: if ($_!~/^rolesdef_/) {
2645: my ($area,$role)=split(/=/,$_);
2646: $area=~s/\_\w\w$//;
2647: my ($trole,$tend,$tstart)=split(/_/,$role);
2648: if (($trole eq 'dc') || ($trole eq 'su')) {
2649: my $active=1;
2650: if ($tend) {
2651: if ($tend<$now) { $active=0; }
2652: }
2653: if ($tstart) {
2654: if ($tstart>$now) { $active=0; }
2655: }
2656: if ($active) { return 1; }
2657: }
2658: }
2659: }
2660: }
2661: return 0;
2662: }
2663:
2664: # -------------------------------------------------------- Get user privileges
2665:
2666: sub rolesinit {
2667: my ($domain,$username,$authhost)=@_;
2668: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2669: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2670: my %allroles=();
2671: my %allgroups=();
2672: my $now=time;
2673: my $userroles="user.login.time=$now\n";
2674: my $group_privs;
2675:
2676: if ($rolesdump ne '') {
2677: foreach (split(/&/,$rolesdump)) {
2678: if ($_!~/^rolesdef_/) {
2679: my ($area,$role)=split(/=/,$_);
2680: $area=~s/\_\w\w$//;
2681: my ($trole,$tend,$tstart,$group_privs);
2682: if ($role=~/^cr/) {
2683: if ($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|) {
2684: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2685: ($tend,$tstart)=split('_',$trest);
2686: } else {
2687: $trole=$role;
2688: }
2689: } elsif ($role =~ m|^gr/|) {
2690: ($trole,$tend,$tstart) = split(/_/,$role);
2691: ($trole,$group_privs) = split(/\//,$trole);
2692: $group_privs = &unescape($group_privs);
2693: } else {
2694: ($trole,$tend,$tstart)=split(/_/,$role);
2695: }
2696: $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username);
2697: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2698: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2699: if (($area ne '') && ($trole ne '')) {
2700: my $spec=$trole.'.'.$area;
2701: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2702: if ($trole =~ /^cr\//) {
2703: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2704: } elsif ($trole eq 'gr') {
2705: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
2706: } else {
2707: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2708: }
2709: }
2710: }
2711: }
2712: my ($author,$adv) = &set_userprivs(\$userroles,\%allroles,\%allgroups);
2713: $userroles.='user.adv='.$adv."\n".
2714: 'user.author='.$author."\n";
2715: $env{'user.adv'}=$adv;
2716: }
2717: return $userroles;
2718: }
2719:
2720: sub set_arearole {
2721: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2722: # log the associated role with the area
2723: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2724: return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
2725: }
2726:
2727: sub custom_roleprivs {
2728: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2729: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2730: my $homsvr=homeserver($rauthor,$rdomain);
2731: if ($hostname{$homsvr} ne '') {
2732: my ($rdummy,$roledef)=
2733: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2734: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2735: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2736: if (defined($syspriv)) {
2737: $$allroles{'cm./'}.=':'.$syspriv;
2738: $$allroles{$spec.'./'}.=':'.$syspriv;
2739: }
2740: if ($tdomain ne '') {
2741: if (defined($dompriv)) {
2742: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2743: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2744: }
2745: if (($trest ne '') && (defined($coursepriv))) {
2746: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2747: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2748: }
2749: }
2750: }
2751: }
2752: }
2753:
2754: sub group_roleprivs {
2755: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
2756: my $access = 1;
2757: my $now = time;
2758: if (($tend!=0) && ($tend<$now)) { $access = 0; }
2759: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
2760: if ($access) {
2761: my ($course,$group) = ($area =~ m|(/\w+/\w+)/([^/]+)$|);
2762: $$allgroups{$course}{$group} .=':'.$group_privs;
2763: }
2764: }
2765:
2766: sub standard_roleprivs {
2767: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2768: if (defined($pr{$trole.':s'})) {
2769: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2770: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2771: }
2772: if ($tdomain ne '') {
2773: if (defined($pr{$trole.':d'})) {
2774: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2775: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2776: }
2777: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2778: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2779: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2780: }
2781: }
2782: }
2783:
2784: sub set_userprivs {
2785: my ($userroles,$allroles,$allgroups) = @_;
2786: my $author=0;
2787: my $adv=0;
2788: my %grouproles = ();
2789: if (keys(%{$allgroups}) > 0) {
2790: foreach my $role (keys %{$allroles}) {
2791: my ($trole,$area,$sec,$extendedarea);
2792: if ($role =~ m|^(\w+)\.(/\w+/\w+)(/?\w*)|) {
2793: $trole = $1;
2794: $area = $2;
2795: $sec = $3;
2796: $extendedarea = $area.$sec;
2797: if (exists($$allgroups{$area})) {
2798: foreach my $group (keys(%{$$allgroups{$area}})) {
2799: my $spec = $trole.'.'.$extendedarea;
2800: $grouproles{$spec.'.'.$area.'/'.$group} =
2801: $$allgroups{$area}{$group};
2802: }
2803: }
2804: }
2805: }
2806: }
2807: foreach (keys(%grouproles)) {
2808: $$allroles{$_} = $grouproles{$_};
2809: }
2810: foreach (keys %{$allroles}) {
2811: my %thesepriv=();
2812: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2813: foreach (split(/:/,$$allroles{$_})) {
2814: if ($_ ne '') {
2815: my ($privilege,$restrictions)=split(/&/,$_);
2816: if ($restrictions eq '') {
2817: $thesepriv{$privilege}='F';
2818: } elsif ($thesepriv{$privilege} ne 'F') {
2819: $thesepriv{$privilege}.=$restrictions;
2820: }
2821: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2822: }
2823: }
2824: my $thesestr='';
2825: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2826: $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
2827: }
2828: return ($author,$adv);
2829: }
2830:
2831: # --------------------------------------------------------------- get interface
2832:
2833: sub get {
2834: my ($namespace,$storearr,$udomain,$uname)=@_;
2835: my $items='';
2836: foreach (@$storearr) {
2837: $items.=escape($_).'&';
2838: }
2839: $items=~s/\&$//;
2840: if (!$udomain) { $udomain=$env{'user.domain'}; }
2841: if (!$uname) { $uname=$env{'user.name'}; }
2842: my $uhome=&homeserver($uname,$udomain);
2843:
2844: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2845: my @pairs=split(/\&/,$rep);
2846: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2847: return @pairs;
2848: }
2849: my %returnhash=();
2850: my $i=0;
2851: foreach (@$storearr) {
2852: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2853: $i++;
2854: }
2855: return %returnhash;
2856: }
2857:
2858: # --------------------------------------------------------------- del interface
2859:
2860: sub del {
2861: my ($namespace,$storearr,$udomain,$uname)=@_;
2862: my $items='';
2863: foreach (@$storearr) {
2864: $items.=escape($_).'&';
2865: }
2866: $items=~s/\&$//;
2867: if (!$udomain) { $udomain=$env{'user.domain'}; }
2868: if (!$uname) { $uname=$env{'user.name'}; }
2869: my $uhome=&homeserver($uname,$udomain);
2870:
2871: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2872: }
2873:
2874: # -------------------------------------------------------------- dump interface
2875:
2876: sub dump {
2877: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2878: if (!$udomain) { $udomain=$env{'user.domain'}; }
2879: if (!$uname) { $uname=$env{'user.name'}; }
2880: my $uhome=&homeserver($uname,$udomain);
2881: if ($regexp) {
2882: $regexp=&escape($regexp);
2883: } else {
2884: $regexp='.';
2885: }
2886: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
2887: my @pairs=split(/\&/,$rep);
2888: my %returnhash=();
2889: foreach (@pairs) {
2890: my ($key,$value)=split(/=/,$_,2);
2891: $returnhash{unescape($key)}=&thaw_unescape($value);
2892: }
2893: return %returnhash;
2894: }
2895:
2896: # --------------------------------------------------------- dumpstore interface
2897:
2898: sub dumpstore {
2899: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2900: return &dump($namespace,$udomain,$uname,$regexp,$range);
2901: }
2902:
2903: # -------------------------------------------------------------- keys interface
2904:
2905: sub getkeys {
2906: my ($namespace,$udomain,$uname)=@_;
2907: if (!$udomain) { $udomain=$env{'user.domain'}; }
2908: if (!$uname) { $uname=$env{'user.name'}; }
2909: my $uhome=&homeserver($uname,$udomain);
2910: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2911: my @keyarray=();
2912: foreach (split(/\&/,$rep)) {
2913: push (@keyarray,&unescape($_));
2914: }
2915: return @keyarray;
2916: }
2917:
2918: # --------------------------------------------------------------- currentdump
2919: sub currentdump {
2920: my ($courseid,$sdom,$sname)=@_;
2921: $courseid = $env{'request.course.id'} if (! defined($courseid));
2922: $sdom = $env{'user.domain'} if (! defined($sdom));
2923: $sname = $env{'user.name'} if (! defined($sname));
2924: my $uhome = &homeserver($sname,$sdom);
2925: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2926: return if ($rep =~ /^(error:|no_such_host)/);
2927: #
2928: my %returnhash=();
2929: #
2930: if ($rep eq "unknown_cmd") {
2931: # an old lond will not know currentdump
2932: # Do a dump and make it look like a currentdump
2933: my @tmp = &dump($courseid,$sdom,$sname,'.');
2934: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2935: my %hash = @tmp;
2936: @tmp=();
2937: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2938: } else {
2939: my @pairs=split(/\&/,$rep);
2940: foreach (@pairs) {
2941: my ($key,$value)=split(/=/,$_);
2942: my ($symb,$param) = split(/:/,$key);
2943: $returnhash{&unescape($symb)}->{&unescape($param)} =
2944: &thaw_unescape($value);
2945: }
2946: }
2947: return %returnhash;
2948: }
2949:
2950: sub convert_dump_to_currentdump{
2951: my %hash = %{shift()};
2952: my %returnhash;
2953: # Code ripped from lond, essentially. The only difference
2954: # here is the unescaping done by lonnet::dump(). Conceivably
2955: # we might run in to problems with parameter names =~ /^v\./
2956: while (my ($key,$value) = each(%hash)) {
2957: my ($v,$symb,$param) = split(/:/,$key);
2958: next if ($v eq 'version' || $symb eq 'keys');
2959: next if (exists($returnhash{$symb}) &&
2960: exists($returnhash{$symb}->{$param}) &&
2961: $returnhash{$symb}->{'v.'.$param} > $v);
2962: $returnhash{$symb}->{$param}=$value;
2963: $returnhash{$symb}->{'v.'.$param}=$v;
2964: }
2965: #
2966: # Remove all of the keys in the hashes which keep track of
2967: # the version of the parameter.
2968: while (my ($symb,$param_hash) = each(%returnhash)) {
2969: # use a foreach because we are going to delete from the hash.
2970: foreach my $key (keys(%$param_hash)) {
2971: delete($param_hash->{$key}) if ($key =~ /^v\./);
2972: }
2973: }
2974: return \%returnhash;
2975: }
2976:
2977: # ------------------------------------------------------ critical inc interface
2978:
2979: sub cinc {
2980: return &inc(@_,'critical');
2981: }
2982:
2983: # --------------------------------------------------------------- inc interface
2984:
2985: sub inc {
2986: my ($namespace,$store,$udomain,$uname,$critical) = @_;
2987: if (!$udomain) { $udomain=$env{'user.domain'}; }
2988: if (!$uname) { $uname=$env{'user.name'}; }
2989: my $uhome=&homeserver($uname,$udomain);
2990: my $items='';
2991: if (! ref($store)) {
2992: # got a single value, so use that instead
2993: $items = &escape($store).'=&';
2994: } elsif (ref($store) eq 'SCALAR') {
2995: $items = &escape($$store).'=&';
2996: } elsif (ref($store) eq 'ARRAY') {
2997: $items = join('=&',map {&escape($_);} @{$store});
2998: } elsif (ref($store) eq 'HASH') {
2999: while (my($key,$value) = each(%{$store})) {
3000: $items.= &escape($key).'='.&escape($value).'&';
3001: }
3002: }
3003: $items=~s/\&$//;
3004: if ($critical) {
3005: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
3006: } else {
3007: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
3008: }
3009: }
3010:
3011: # --------------------------------------------------------------- put interface
3012:
3013: sub put {
3014: my ($namespace,$storehash,$udomain,$uname)=@_;
3015: if (!$udomain) { $udomain=$env{'user.domain'}; }
3016: if (!$uname) { $uname=$env{'user.name'}; }
3017: my $uhome=&homeserver($uname,$udomain);
3018: my $items='';
3019: foreach (keys %$storehash) {
3020: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3021: }
3022: $items=~s/\&$//;
3023: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3024: }
3025:
3026: # ------------------------------------------------------------ newput interface
3027:
3028: sub newput {
3029: my ($namespace,$storehash,$udomain,$uname)=@_;
3030: if (!$udomain) { $udomain=$env{'user.domain'}; }
3031: if (!$uname) { $uname=$env{'user.name'}; }
3032: my $uhome=&homeserver($uname,$udomain);
3033: my $items='';
3034: foreach my $key (keys(%$storehash)) {
3035: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3036: }
3037: $items=~s/\&$//;
3038: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
3039: }
3040:
3041: # --------------------------------------------------------- putstore interface
3042:
3043: sub putstore {
3044: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3045: if (!$udomain) { $udomain=$env{'user.domain'}; }
3046: if (!$uname) { $uname=$env{'user.name'}; }
3047: my $uhome=&homeserver($uname,$udomain);
3048: my $items='';
3049: foreach my $key (keys(%$storehash)) {
3050: $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
3051: }
3052: $items=~s/\&$//;
3053: my $esc_symb=&escape($symb);
3054: my $esc_v=&escape($version);
3055: my $reply =
3056: &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
3057: $uhome);
3058: if ($reply eq 'unknown_cmd') {
3059: # gfall back to way things use to be done
3060: return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
3061: $uname);
3062: }
3063: return $reply;
3064: }
3065:
3066: sub old_putstore {
3067: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3068: if (!$udomain) { $udomain=$env{'user.domain'}; }
3069: if (!$uname) { $uname=$env{'user.name'}; }
3070: my $uhome=&homeserver($uname,$udomain);
3071: my %newstorehash;
3072: foreach (keys %$storehash) {
3073: my $key = $version.':'.&escape($symb).':'.$_;
3074: $newstorehash{$key} = $storehash->{$_};
3075: }
3076: my $items='';
3077: my %allitems = ();
3078: foreach (keys %newstorehash) {
3079: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
3080: my $key = $1.':keys:'.$2;
3081: $allitems{$key} .= $3.':';
3082: }
3083: $items.=$_.'='.&freeze_escape($newstorehash{$_}).'&';
3084: }
3085: foreach (keys %allitems) {
3086: $allitems{$_} =~ s/\:$//;
3087: $items.= $_.'='.$allitems{$_}.'&';
3088: }
3089: $items=~s/\&$//;
3090: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3091: }
3092:
3093: # ------------------------------------------------------ critical put interface
3094:
3095: sub cput {
3096: my ($namespace,$storehash,$udomain,$uname)=@_;
3097: if (!$udomain) { $udomain=$env{'user.domain'}; }
3098: if (!$uname) { $uname=$env{'user.name'}; }
3099: my $uhome=&homeserver($uname,$udomain);
3100: my $items='';
3101: foreach (keys %$storehash) {
3102: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3103: }
3104: $items=~s/\&$//;
3105: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
3106: }
3107:
3108: # -------------------------------------------------------------- eget interface
3109:
3110: sub eget {
3111: my ($namespace,$storearr,$udomain,$uname)=@_;
3112: my $items='';
3113: foreach (@$storearr) {
3114: $items.=escape($_).'&';
3115: }
3116: $items=~s/\&$//;
3117: if (!$udomain) { $udomain=$env{'user.domain'}; }
3118: if (!$uname) { $uname=$env{'user.name'}; }
3119: my $uhome=&homeserver($uname,$udomain);
3120: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3121: my @pairs=split(/\&/,$rep);
3122: my %returnhash=();
3123: my $i=0;
3124: foreach (@$storearr) {
3125: $returnhash{$_}=&thaw_unescape($pairs[$i]);
3126: $i++;
3127: }
3128: return %returnhash;
3129: }
3130:
3131: # ------------------------------------------------------------ tmpput interface
3132: sub tmpput {
3133: my ($storehash,$server)=@_;
3134: my $items='';
3135: foreach (keys(%$storehash)) {
3136: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3137: }
3138: $items=~s/\&$//;
3139: return &reply("tmpput:$items",$server);
3140: }
3141:
3142: # ------------------------------------------------------------ tmpget interface
3143: sub tmpget {
3144: my ($token,$server)=@_;
3145: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3146: my $rep=&reply("tmpget:$token",$server);
3147: my %returnhash;
3148: foreach my $item (split(/\&/,$rep)) {
3149: my ($key,$value)=split(/=/,$item);
3150: $returnhash{&unescape($key)}=&thaw_unescape($value);
3151: }
3152: return %returnhash;
3153: }
3154:
3155: # ------------------------------------------------------------ tmpget interface
3156: sub tmpdel {
3157: my ($token,$server)=@_;
3158: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3159: return &reply("tmpdel:$token",$server);
3160: }
3161:
3162: # ---------------------------------------------- Custom access rule evaluation
3163:
3164: sub customaccess {
3165: my ($priv,$uri)=@_;
3166: my ($urole,$urealm)=split(/\./,$env{'request.role'});
3167: $urealm=~s/^\W//;
3168: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
3169: my $access=0;
3170: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
3171: my ($effect,$realm,$role)=split(/\:/,$_);
3172: if ($role) {
3173: if ($role ne $urole) { next; }
3174: }
3175: foreach (split(/\s*\,\s*/,$realm)) {
3176: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
3177: if ($tdom) {
3178: if ($tdom ne $udom) { next; }
3179: }
3180: if ($tcrs) {
3181: if ($tcrs ne $ucrs) { next; }
3182: }
3183: if ($tsec) {
3184: if ($tsec ne $usec) { next; }
3185: }
3186: $access=($effect eq 'allow');
3187: last;
3188: }
3189: if ($realm eq '' && $role eq '') {
3190: $access=($effect eq 'allow');
3191: }
3192: }
3193: return $access;
3194: }
3195:
3196: # ------------------------------------------------- Check for a user privilege
3197:
3198: sub allowed {
3199: my ($priv,$uri,$symb)=@_;
3200: my $ver_orguri=$uri;
3201: $uri=&deversion($uri);
3202: my $orguri=$uri;
3203: $uri=&declutter($uri);
3204:
3205: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3206: # Free bre access to adm and meta resources
3207: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
3208: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
3209: return 'F';
3210: }
3211:
3212: # Free bre access to user's own portfolio contents
3213: my ($space,$domain,$name,@dir)=split('/',$uri);
3214: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3215: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
3216: return 'F';
3217: }
3218:
3219: # bre access to group if user has rgf priv for this group and course.
3220: if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
3221: && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
3222: if (exists($env{'request.course.id'})) {
3223: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
3224: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
3225: if (($domain eq $cdom) && ($name eq $cnum)) {
3226: my $courseprivid=$env{'request.course.id'};
3227: $courseprivid=~s/\_/\//;
3228: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
3229: .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
3230: return $1;
3231: }
3232: }
3233: }
3234: }
3235:
3236: # Free bre to public access
3237:
3238: if ($priv eq 'bre') {
3239: my $copyright=&metadata($uri,'copyright');
3240: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3241: return 'F';
3242: }
3243: if ($copyright eq 'priv') {
3244: $uri=~/([^\/]+)\/([^\/]+)\//;
3245: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3246: return '';
3247: }
3248: }
3249: if ($copyright eq 'domain') {
3250: $uri=~/([^\/]+)\/([^\/]+)\//;
3251: unless (($env{'user.domain'} eq $1) ||
3252: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3253: return '';
3254: }
3255: }
3256: if ($env{'request.role'}=~ /li\.\//) {
3257: # Library role, so allow browsing of resources in this domain.
3258: return 'F';
3259: }
3260: if ($copyright eq 'custom') {
3261: unless (&customaccess($priv,$uri)) { return ''; }
3262: }
3263: }
3264: # Domain coordinator is trying to create a course
3265: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3266: # uri is the requested domain in this case.
3267: # comparison to 'request.role.domain' shows if the user has selected
3268: # a role of dc for the domain in question.
3269: return 'F' if ($uri eq $env{'request.role.domain'});
3270: }
3271:
3272: my $thisallowed='';
3273: my $statecond=0;
3274: my $courseprivid='';
3275:
3276: # Course
3277:
3278: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3279: $thisallowed.=$1;
3280: }
3281:
3282: # Domain
3283:
3284: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3285: =~/\Q$priv\E\&([^\:]*)/) {
3286: $thisallowed.=$1;
3287: }
3288:
3289: # Course: uri itself is a course
3290: my $courseuri=$uri;
3291: $courseuri=~s/\_(\d)/\/$1/;
3292: $courseuri=~s/^([^\/])/\/$1/;
3293:
3294: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3295: =~/\Q$priv\E\&([^\:]*)/) {
3296: $thisallowed.=$1;
3297: }
3298:
3299: # Group: uri itself is a group
3300: my $groupuri=$uri;
3301: $groupuri=~s/^([^\/])/\/$1/;
3302: if ($env{'user.priv.'.$env{'request.role'}.'.'.$groupuri}
3303: =~/\Q$priv\E\&([^\:]*)/) {
3304: $thisallowed.=$1;
3305: }
3306:
3307: # URI is an uploaded document for this course, default permissions don't matter
3308: # not allowing 'edit' access (editupload) to uploaded course docs
3309: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3310: $thisallowed='';
3311: my ($match)=&is_on_map($uri);
3312: if ($match) {
3313: if ($env{'user.priv.'.$env{'request.role'}.'./'}
3314: =~/\Q$priv\E\&([^\:]*)/) {
3315: $thisallowed.=$1;
3316: }
3317: } else {
3318: my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
3319: if ($refuri) {
3320: if ($refuri =~ m|^/adm/|) {
3321: $thisallowed='F';
3322: } else {
3323: $refuri=&declutter($refuri);
3324: my ($match) = &is_on_map($refuri);
3325: if ($match) {
3326: $thisallowed='F';
3327: }
3328: }
3329: }
3330: }
3331: }
3332:
3333: # Full access at system, domain or course-wide level? Exit.
3334:
3335: if ($thisallowed=~/F/) {
3336: return 'F';
3337: }
3338:
3339: # If this is generating or modifying users, exit with special codes
3340:
3341: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3342: if (($priv eq 'cca') || ($priv eq 'caa')) {
3343: my ($audom,$auname)=split('/',$uri);
3344: # no author name given, so this just checks on the general right to make a co-author in this domain
3345: unless ($auname) { return $thisallowed; }
3346: # an author name is given, so we are about to actually make a co-author for a certain account
3347: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3348: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3349: ($audom ne $env{'request.role.domain'}))) { return ''; }
3350: }
3351: return $thisallowed;
3352: }
3353: #
3354: # Gathered so far: system, domain and course wide privileges
3355: #
3356: # Course: See if uri or referer is an individual resource that is part of
3357: # the course
3358:
3359: if ($env{'request.course.id'}) {
3360:
3361: $courseprivid=$env{'request.course.id'};
3362: if ($env{'request.course.sec'}) {
3363: $courseprivid.='/'.$env{'request.course.sec'};
3364: }
3365: $courseprivid=~s/\_/\//;
3366: my $checkreferer=1;
3367: my ($match,$cond)=&is_on_map($uri);
3368: if ($match) {
3369: $statecond=$cond;
3370: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3371: =~/\Q$priv\E\&([^\:]*)/) {
3372: $thisallowed.=$1;
3373: $checkreferer=0;
3374: }
3375: }
3376:
3377: if ($checkreferer) {
3378: my $refuri=$env{'httpref.'.$orguri};
3379: unless ($refuri) {
3380: foreach (keys %env) {
3381: if ($_=~/^httpref\..*\*/) {
3382: my $pattern=$_;
3383: $pattern=~s/^httpref\.\/res\///;
3384: $pattern=~s/\*/\[\^\/\]\+/g;
3385: $pattern=~s/\//\\\//g;
3386: if ($orguri=~/$pattern/) {
3387: $refuri=$env{$_};
3388: }
3389: }
3390: }
3391: }
3392:
3393: if ($refuri) {
3394: $refuri=&declutter($refuri);
3395: my ($match,$cond)=&is_on_map($refuri);
3396: if ($match) {
3397: my $refstatecond=$cond;
3398: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3399: =~/\Q$priv\E\&([^\:]*)/) {
3400: $thisallowed.=$1;
3401: $uri=$refuri;
3402: $statecond=$refstatecond;
3403: }
3404: }
3405: }
3406: }
3407: }
3408:
3409: #
3410: # Gathered now: all privileges that could apply, and condition number
3411: #
3412: #
3413: # Full or no access?
3414: #
3415:
3416: if ($thisallowed=~/F/) {
3417: return 'F';
3418: }
3419:
3420: unless ($thisallowed) {
3421: return '';
3422: }
3423:
3424: # Restrictions exist, deal with them
3425: #
3426: # C:according to course preferences
3427: # R:according to resource settings
3428: # L:unless locked
3429: # X:according to user session state
3430: #
3431:
3432: # Possibly locked functionality, check all courses
3433: # Locks might take effect only after 10 minutes cache expiration for other
3434: # courses, and 2 minutes for current course
3435:
3436: my $envkey;
3437: if ($thisallowed=~/L/) {
3438: foreach $envkey (keys %env) {
3439: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3440: my $courseid=$2;
3441: my $roleid=$1.'.'.$2;
3442: $courseid=~s/^\///;
3443: my $expiretime=600;
3444: if ($env{'request.role'} eq $roleid) {
3445: $expiretime=120;
3446: }
3447: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3448: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3449: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3450: &coursedescription($courseid);
3451: }
3452: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3453: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3454: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3455: &log($env{'user.domain'},$env{'user.name'},
3456: $env{'user.home'},
3457: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3458: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3459: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3460: return '';
3461: }
3462: }
3463: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3464: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3465: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3466: &log($env{'user.domain'},$env{'user.name'},
3467: $env{'user.home'},
3468: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3469: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3470: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3471: return '';
3472: }
3473: }
3474: }
3475: }
3476: }
3477:
3478: #
3479: # Rest of the restrictions depend on selected course
3480: #
3481:
3482: unless ($env{'request.course.id'}) {
3483: return '1';
3484: }
3485:
3486: #
3487: # Now user is definitely in a course
3488: #
3489:
3490:
3491: # Course preferences
3492:
3493: if ($thisallowed=~/C/) {
3494: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3495: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
3496: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
3497: =~/\Q$rolecode\E/) {
3498: if ($priv ne 'pch') {
3499: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3500: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3501: $env{'request.course.id'});
3502: }
3503: return '';
3504: }
3505:
3506: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
3507: =~/\Q$unamedom\E/) {
3508: if ($priv ne 'pch') {
3509: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
3510: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3511: $env{'request.course.id'});
3512: }
3513: return '';
3514: }
3515: }
3516:
3517: # Resource preferences
3518:
3519: if ($thisallowed=~/R/) {
3520: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3521: if (&metadata($uri,'roledeny')=~/\Q$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 '.$rolecode);
3525: }
3526: return '';
3527: }
3528: }
3529:
3530: # Restricted by state or randomout?
3531:
3532: if ($thisallowed=~/X/) {
3533: if ($env{'acc.randomout'}) {
3534: if (!$symb) { $symb=&symbread($uri,1); }
3535: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3536: return '';
3537: }
3538: }
3539: if (&condval($statecond)) {
3540: return '2';
3541: } else {
3542: return '';
3543: }
3544: }
3545:
3546: return 'F';
3547: }
3548:
3549: sub split_uri_for_cond {
3550: my $uri=&deversion(&declutter(shift));
3551: my @uriparts=split(/\//,$uri);
3552: my $filename=pop(@uriparts);
3553: my $pathname=join('/',@uriparts);
3554: return ($pathname,$filename);
3555: }
3556: # --------------------------------------------------- Is a resource on the map?
3557:
3558: sub is_on_map {
3559: my ($pathname,$filename) = &split_uri_for_cond(shift);
3560: #Trying to find the conditional for the file
3561: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3562: /\&\Q$filename\E\:([\d\|]+)\&/);
3563: if ($match) {
3564: return (1,$1);
3565: } else {
3566: return (0,0);
3567: }
3568: }
3569:
3570: # --------------------------------------------------------- Get symb from alias
3571:
3572: sub get_symb_from_alias {
3573: my $symb=shift;
3574: my ($map,$resid,$url)=&decode_symb($symb);
3575: # Already is a symb
3576: if ($url) { return $symb; }
3577: # Must be an alias
3578: my $aliassymb='';
3579: my %bighash;
3580: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
3581: &GDBM_READER(),0640)) {
3582: my $rid=$bighash{'mapalias_'.$symb};
3583: if ($rid) {
3584: my ($mapid,$resid)=split(/\./,$rid);
3585: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3586: $resid,$bighash{'src_'.$rid});
3587: }
3588: untie %bighash;
3589: }
3590: return $aliassymb;
3591: }
3592:
3593: # ----------------------------------------------------------------- Define Role
3594:
3595: sub definerole {
3596: if (allowed('mcr','/')) {
3597: my ($rolename,$sysrole,$domrole,$courole)=@_;
3598: foreach (split(':',$sysrole)) {
3599: my ($crole,$cqual)=split(/\&/,$_);
3600: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3601: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3602: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3603: return "refused:s:$crole&$cqual";
3604: }
3605: }
3606: }
3607: foreach (split(':',$domrole)) {
3608: my ($crole,$cqual)=split(/\&/,$_);
3609: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3610: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3611: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3612: return "refused:d:$crole&$cqual";
3613: }
3614: }
3615: }
3616: foreach (split(':',$courole)) {
3617: my ($crole,$cqual)=split(/\&/,$_);
3618: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3619: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3620: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3621: return "refused:c:$crole&$cqual";
3622: }
3623: }
3624: }
3625: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3626: "$env{'user.domain'}:$env{'user.name'}:".
3627: "rolesdef_$rolename=".
3628: escape($sysrole.'_'.$domrole.'_'.$courole);
3629: return reply($command,$env{'user.home'});
3630: } else {
3631: return 'refused';
3632: }
3633: }
3634:
3635: # ---------------- Make a metadata query against the network of library servers
3636:
3637: sub metadata_query {
3638: my ($query,$custom,$customshow,$server_array)=@_;
3639: my %rhash;
3640: my @server_list = (defined($server_array) ? @$server_array
3641: : keys(%libserv) );
3642: for my $server (@server_list) {
3643: unless ($custom or $customshow) {
3644: my $reply=&reply("querysend:".&escape($query),$server);
3645: $rhash{$server}=$reply;
3646: }
3647: else {
3648: my $reply=&reply("querysend:".&escape($query).':'.
3649: &escape($custom).':'.&escape($customshow),
3650: $server);
3651: $rhash{$server}=$reply;
3652: }
3653: }
3654: return \%rhash;
3655: }
3656:
3657: # ----------------------------------------- Send log queries and wait for reply
3658:
3659: sub log_query {
3660: my ($uname,$udom,$query,%filters)=@_;
3661: my $uhome=&homeserver($uname,$udom);
3662: if ($uhome eq 'no_host') { return 'error: no_host'; }
3663: my $uhost=$hostname{$uhome};
3664: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3665: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3666: $uhome);
3667: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3668: return get_query_reply($queryid);
3669: }
3670:
3671: # ------- Request retrieval of institutional classlists for course(s)
3672:
3673: sub fetch_enrollment_query {
3674: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3675: my $homeserver;
3676: my $maxtries = 1;
3677: if ($context eq 'automated') {
3678: $homeserver = $perlvar{'lonHostID'};
3679: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3680: } else {
3681: $homeserver = &homeserver($cnum,$dom);
3682: }
3683: my $host=$hostname{$homeserver};
3684: my $cmd = '';
3685: foreach (keys %{$affiliatesref}) {
3686: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3687: }
3688: $cmd =~ s/%%$//;
3689: $cmd = &escape($cmd);
3690: my $query = 'fetchenrollment';
3691: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
3692: unless ($queryid=~/^\Q$host\E\_/) {
3693: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3694: return 'error: '.$queryid;
3695: }
3696: my $reply = &get_query_reply($queryid);
3697: my $tries = 1;
3698: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3699: $reply = &get_query_reply($queryid);
3700: $tries ++;
3701: }
3702: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3703: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3704: } else {
3705: my @responses = split/:/,$reply;
3706: if ($homeserver eq $perlvar{'lonHostID'}) {
3707: foreach (@responses) {
3708: my ($key,$value) = split/=/,$_;
3709: $$replyref{$key} = $value;
3710: }
3711: } else {
3712: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3713: foreach (@responses) {
3714: my ($key,$value) = split/=/,$_;
3715: $$replyref{$key} = $value;
3716: if ($value > 0) {
3717: foreach (@{$$affiliatesref{$key}}) {
3718: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3719: my $destname = $pathname.'/'.$filename;
3720: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3721: if ($xml_classlist =~ /^error/) {
3722: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3723: } else {
3724: if ( open(FILE,">$destname") ) {
3725: print FILE &unescape($xml_classlist);
3726: close(FILE);
3727: } else {
3728: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3729: }
3730: }
3731: }
3732: }
3733: }
3734: }
3735: return 'ok';
3736: }
3737: return 'error';
3738: }
3739:
3740: sub get_query_reply {
3741: my $queryid=shift;
3742: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3743: my $reply='';
3744: for (1..100) {
3745: sleep 2;
3746: if (-e $replyfile.'.end') {
3747: if (open(my $fh,$replyfile)) {
3748: $reply.=<$fh>;
3749: close($fh);
3750: } else { return 'error: reply_file_error'; }
3751: return &unescape($reply);
3752: }
3753: }
3754: return 'timeout:'.$queryid;
3755: }
3756:
3757: sub courselog_query {
3758: #
3759: # possible filters:
3760: # url: url or symb
3761: # username
3762: # domain
3763: # action: view, submit, grade
3764: # start: timestamp
3765: # end: timestamp
3766: #
3767: my (%filters)=@_;
3768: unless ($env{'request.course.id'}) { return 'no_course'; }
3769: if ($filters{'url'}) {
3770: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3771: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3772: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3773: }
3774: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
3775: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
3776: return &log_query($cname,$cdom,'courselog',%filters);
3777: }
3778:
3779: sub userlog_query {
3780: my ($uname,$udom,%filters)=@_;
3781: return &log_query($uname,$udom,'userlog',%filters);
3782: }
3783:
3784: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3785:
3786: sub auto_run {
3787: my ($cnum,$cdom) = @_;
3788: my $homeserver = &homeserver($cnum,$cdom);
3789: my $response = &reply('autorun:'.$cdom,$homeserver);
3790: return $response;
3791: }
3792:
3793: sub auto_get_sections {
3794: my ($cnum,$cdom,$inst_coursecode) = @_;
3795: my $homeserver = &homeserver($cnum,$cdom);
3796: my @secs = ();
3797: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3798: unless ($response eq 'refused') {
3799: @secs = split/:/,$response;
3800: }
3801: return @secs;
3802: }
3803:
3804: sub auto_new_course {
3805: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3806: my $homeserver = &homeserver($cnum,$cdom);
3807: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3808: return $response;
3809: }
3810:
3811: sub auto_validate_courseID {
3812: my ($cnum,$cdom,$inst_course_id) = @_;
3813: my $homeserver = &homeserver($cnum,$cdom);
3814: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3815: return $response;
3816: }
3817:
3818: sub auto_create_password {
3819: my ($cnum,$cdom,$authparam) = @_;
3820: my $homeserver = &homeserver($cnum,$cdom);
3821: my $create_passwd = 0;
3822: my $authchk = '';
3823: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3824: if ($response eq 'refused') {
3825: $authchk = 'refused';
3826: } else {
3827: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3828: }
3829: return ($authparam,$create_passwd,$authchk);
3830: }
3831:
3832: sub auto_photo_permission {
3833: my ($cnum,$cdom,$students) = @_;
3834: my $homeserver = &homeserver($cnum,$cdom);
3835: my ($outcome,$perm_reqd,$conditions) =
3836: split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
3837: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
3838: return (undef,undef);
3839: }
3840: return ($outcome,$perm_reqd,$conditions);
3841: }
3842:
3843: sub auto_checkphotos {
3844: my ($uname,$udom,$pid) = @_;
3845: my $homeserver = &homeserver($uname,$udom);
3846: my ($result,$resulttype);
3847: my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
3848: &escape($uname).':'.&escape($pid),
3849: $homeserver));
3850: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
3851: return (undef,undef);
3852: }
3853: if ($outcome) {
3854: ($result,$resulttype) = split(/:/,$outcome);
3855: }
3856: return ($result,$resulttype);
3857: }
3858:
3859: sub auto_photochoice {
3860: my ($cnum,$cdom) = @_;
3861: my $homeserver = &homeserver($cnum,$cdom);
3862: my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
3863: &escape($cdom),
3864: $homeserver)));
3865: if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
3866: return (undef,undef);
3867: }
3868: return ($update,$comment);
3869: }
3870:
3871: sub auto_photoupdate {
3872: my ($affiliatesref,$dom,$cnum,$photo) = @_;
3873: my $homeserver = &homeserver($cnum,$dom);
3874: my $host=$hostname{$homeserver};
3875: my $cmd = '';
3876: my $maxtries = 1;
3877: foreach (keys %{$affiliatesref}) {
3878: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3879: }
3880: $cmd =~ s/%%$//;
3881: $cmd = &escape($cmd);
3882: my $query = 'institutionalphotos';
3883: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
3884: unless ($queryid=~/^\Q$host\E\_/) {
3885: &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
3886: return 'error: '.$queryid;
3887: }
3888: my $reply = &get_query_reply($queryid);
3889: my $tries = 1;
3890: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3891: $reply = &get_query_reply($queryid);
3892: $tries ++;
3893: }
3894: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3895: &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3896: } else {
3897: my @responses = split(/:/,$reply);
3898: my $outcome = shift(@responses);
3899: foreach my $item (@responses) {
3900: my ($key,$value) = split(/=/,$item);
3901: $$photo{$key} = $value;
3902: }
3903: return $outcome;
3904: }
3905: return 'error';
3906: }
3907:
3908: sub auto_instcode_format {
3909: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3910: my $courses = '';
3911: my $homeserver;
3912: if ($caller eq 'global') {
3913: foreach my $tryserver (keys %libserv) {
3914: if ($hostdom{$tryserver} eq $codedom) {
3915: $homeserver = $tryserver;
3916: last;
3917: }
3918: }
3919: if (($env{'user.name'}) && ($env{'user.domain'} eq $codedom)) {
3920: $homeserver = &homeserver($env{'user.name'},$codedom);
3921: }
3922: } else {
3923: $homeserver = &homeserver($caller,$codedom);
3924: }
3925: foreach (keys %{$instcodes}) {
3926: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3927: }
3928: chop($courses);
3929: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3930: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3931: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3932: %{$codes} = &str2hash($codes_str);
3933: @{$codetitles} = &str2array($codetitles_str);
3934: %{$cat_titles} = &str2hash($cat_titles_str);
3935: %{$cat_order} = &str2hash($cat_order_str);
3936: return 'ok';
3937: }
3938: return $response;
3939: }
3940:
3941: # ------------------------------------------------------- Course Group routines
3942:
3943: sub get_coursegroups {
3944: my ($cdom,$cnum,$group) = @_;
3945: return(&dump('coursegroups',$cdom,$cnum,$group));
3946: }
3947:
3948: sub modify_coursegroup {
3949: my ($cdom,$cnum,$groupsettings) = @_;
3950: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
3951: }
3952:
3953: sub modify_group_roles {
3954: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
3955: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
3956: my $role = 'gr/'.&escape($userprivs);
3957: my ($uname,$udom) = split(/:/,$user);
3958: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
3959: if ($result eq 'ok') {
3960: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
3961: }
3962:
3963: return $result;
3964: }
3965:
3966: sub modify_coursegroup_membership {
3967: my ($cdom,$cnum,$membership) = @_;
3968: my $result = &put('groupmembership',$membership,$cdom,$cnum);
3969: return $result;
3970: }
3971:
3972: sub get_active_groups {
3973: my ($udom,$uname,$cdom,$cnum) = @_;
3974: my $now = time;
3975: my %groups = ();
3976: foreach my $key (keys(%env)) {
3977: if ($key =~ m-user\.role\.gr\./([^/]+)/([^/]+)/(\w+)$-) {
3978: my ($start,$end) = split(/\./,$env{$key});
3979: if (($end!=0) && ($end<$now)) { next; }
3980: if (($start!=0) && ($start>$now)) { next; }
3981: if ($1 eq $cdom && $2 eq $cnum) {
3982: $groups{$3} = $env{$key} ;
3983: }
3984: }
3985: }
3986: return %groups;
3987: }
3988:
3989: sub get_group_membership {
3990: my ($cdom,$cnum,$group) = @_;
3991: return(&dump('groupmembership',$cdom,$cnum,$group));
3992: }
3993:
3994: sub get_users_groups {
3995: my ($udom,$uname,$courseid) = @_;
3996: my $cachetime=1800;
3997: $courseid=~s/\_/\//g;
3998: $courseid=~s/^(\w)/\/$1/;
3999:
4000: my $hashid="$udom:$uname:$courseid";
4001: my ($result,$cached)=&is_cached_new('getgroups',$hashid);
4002: if (defined($cached)) { return $result; }
4003:
4004: my %roleshash = &dump('roles',$udom,$uname,$courseid);
4005: my ($tmp) = keys(%roleshash);
4006: if ($tmp=~/^error:/) {
4007: &logthis('Error retrieving roles: '.$tmp.' for '.$uname.':'.$udom);
4008: return '';
4009: } else {
4010: my $grouplist;
4011: foreach my $key (keys %roleshash) {
4012: if ($key =~ /^\Q$courseid\E\/(\w+)\_gr$/) {
4013: unless ($roleshash{$key} =~ /_\d+_\-1$/) { # deleted membership
4014: $grouplist .= $1.':';
4015: }
4016: }
4017: }
4018: $grouplist =~ s/:$//;
4019: return &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
4020: }
4021: }
4022:
4023: sub devalidate_getgroups_cache {
4024: my ($udom,$uname,$cdom,$cnum)=@_;
4025: my $courseid = $cdom.'_'.$cnum;
4026: $courseid=~s/\_/\//g;
4027: $courseid=~s/^(\w)/\/$1/;
4028: my $hashid="$udom:$uname:$courseid";
4029: &devalidate_cache_new('getgroups',$hashid);
4030: }
4031:
4032: # ------------------------------------------------------------------ Plain Text
4033:
4034: sub plaintext {
4035: my $short=shift;
4036: return &Apache::lonlocal::mt($prp{$short});
4037: }
4038:
4039: # ----------------------------------------------------------------- Assign Role
4040:
4041: sub assignrole {
4042: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
4043: my $mrole;
4044: if ($role =~ /^cr\//) {
4045: my $cwosec=$url;
4046: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4047: unless (&allowed('ccr',$cwosec)) {
4048: &logthis('Refused custom assignrole: '.
4049: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4050: $env{'user.name'}.' at '.$env{'user.domain'});
4051: return 'refused';
4052: }
4053: $mrole='cr';
4054: } elsif ($role =~ /^gr\//) {
4055: my $cwogrp=$url;
4056: $cwogrp=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4057: unless (&allowed('mdg',$cwogrp)) {
4058: &logthis('Refused group assignrole: '.
4059: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4060: $env{'user.name'}.' at '.$env{'user.domain'});
4061: return 'refused';
4062: }
4063: $mrole='gr';
4064: } else {
4065: my $cwosec=$url;
4066: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4067: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
4068: &logthis('Refused assignrole: '.
4069: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4070: $env{'user.name'}.' at '.$env{'user.domain'});
4071: return 'refused';
4072: }
4073: $mrole=$role;
4074: }
4075: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4076: "$udom:$uname:$url".'_'."$mrole=$role";
4077: if ($end) { $command.='_'.$end; }
4078: if ($start) {
4079: if ($end) {
4080: $command.='_'.$start;
4081: } else {
4082: $command.='_0_'.$start;
4083: }
4084: }
4085: # actually delete
4086: if ($deleteflag) {
4087: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
4088: # modify command to delete the role
4089: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
4090: "$udom:$uname:$url".'_'."$mrole";
4091: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
4092: # set start and finish to negative values for userrolelog
4093: $start=-1;
4094: $end=-1;
4095: }
4096: }
4097: # send command
4098: my $answer=&reply($command,&homeserver($uname,$udom));
4099: # log new user role if status is ok
4100: if ($answer eq 'ok') {
4101: &userrolelog($role,$uname,$udom,$url,$start,$end);
4102: }
4103: return $answer;
4104: }
4105:
4106: # -------------------------------------------------- Modify user authentication
4107: # Overrides without validation
4108:
4109: sub modifyuserauth {
4110: my ($udom,$uname,$umode,$upass)=@_;
4111: my $uhome=&homeserver($uname,$udom);
4112: unless (&allowed('mau',$udom)) { return 'refused'; }
4113: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
4114: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4115: ' in domain '.$env{'request.role.domain'});
4116: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
4117: &escape($upass),$uhome);
4118: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
4119: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
4120: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4121: &log($udom,,$uname,$uhome,
4122: 'Authentication changed by '.$env{'user.domain'}.', '.
4123: $env{'user.name'}.', '.$umode.
4124: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4125: unless ($reply eq 'ok') {
4126: &logthis('Authentication mode error: '.$reply);
4127: return 'error: '.$reply;
4128: }
4129: return 'ok';
4130: }
4131:
4132: # --------------------------------------------------------------- Modify a user
4133:
4134: sub modifyuser {
4135: my ($udom, $uname, $uid,
4136: $umode, $upass, $first,
4137: $middle, $last, $gene,
4138: $forceid, $desiredhome, $email)=@_;
4139: $udom=~s/\W//g;
4140: $uname=~s/\W//g;
4141: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
4142: $umode.', '.$first.', '.$middle.', '.
4143: $last.', '.$gene.'(forceid: '.$forceid.')'.
4144: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
4145: ' desiredhome not specified').
4146: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4147: ' in domain '.$env{'request.role.domain'});
4148: my $uhome=&homeserver($uname,$udom,'true');
4149: # ----------------------------------------------------------------- Create User
4150: if (($uhome eq 'no_host') &&
4151: (($umode && $upass) || ($umode eq 'localauth'))) {
4152: my $unhome='';
4153: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
4154: $unhome = $desiredhome;
4155: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
4156: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
4157: } else { # load balancing routine for determining $unhome
4158: my $tryserver;
4159: my $loadm=10000000;
4160: foreach $tryserver (keys %libserv) {
4161: if ($hostdom{$tryserver} eq $udom) {
4162: my $answer=reply('load',$tryserver);
4163: if (($answer=~/\d+/) && ($answer<$loadm)) {
4164: $loadm=$answer;
4165: $unhome=$tryserver;
4166: }
4167: }
4168: }
4169: }
4170: if (($unhome eq '') || ($unhome eq 'no_host')) {
4171: return 'error: unable to find a home server for '.$uname.
4172: ' in domain '.$udom;
4173: }
4174: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
4175: &escape($upass),$unhome);
4176: unless ($reply eq 'ok') {
4177: return 'error: '.$reply;
4178: }
4179: $uhome=&homeserver($uname,$udom,'true');
4180: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
4181: return 'error: unable verify users home machine.';
4182: }
4183: } # End of creation of new user
4184: # ---------------------------------------------------------------------- Add ID
4185: if ($uid) {
4186: $uid=~tr/A-Z/a-z/;
4187: my %uidhash=&idrget($udom,$uname);
4188: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
4189: && (!$forceid)) {
4190: unless ($uid eq $uidhash{$uname}) {
4191: return 'error: user id "'.$uid.'" does not match '.
4192: 'current user id "'.$uidhash{$uname}.'".';
4193: }
4194: } else {
4195: &idput($udom,($uname => $uid));
4196: }
4197: }
4198: # -------------------------------------------------------------- Add names, etc
4199: my @tmp=&get('environment',
4200: ['firstname','middlename','lastname','generation'],
4201: $udom,$uname);
4202: my %names;
4203: if ($tmp[0] =~ m/^error:.*/) {
4204: %names=();
4205: } else {
4206: %names = @tmp;
4207: }
4208: #
4209: # Make sure to not trash student environment if instructor does not bother
4210: # to supply name and email information
4211: #
4212: if ($first) { $names{'firstname'} = $first; }
4213: if (defined($middle)) { $names{'middlename'} = $middle; }
4214: if ($last) { $names{'lastname'} = $last; }
4215: if (defined($gene)) { $names{'generation'} = $gene; }
4216: if ($email) {
4217: $email=~s/[^\w\@\.\-\,]//gs;
4218: if ($email=~/\@/) { $names{'notification'} = $email;
4219: $names{'critnotification'} = $email;
4220: $names{'permanentemail'} = $email; }
4221: }
4222: my $reply = &put('environment', \%names, $udom,$uname);
4223: if ($reply ne 'ok') { return 'error: '.$reply; }
4224: &devalidate_cache_new('namescache',$uname.':'.$udom);
4225: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
4226: $umode.', '.$first.', '.$middle.', '.
4227: $last.', '.$gene.' by '.
4228: $env{'user.name'}.' at '.$env{'user.domain'});
4229: return 'ok';
4230: }
4231:
4232: # -------------------------------------------------------------- Modify student
4233:
4234: sub modifystudent {
4235: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
4236: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
4237: if (!$cid) {
4238: unless ($cid=$env{'request.course.id'}) {
4239: return 'not_in_class';
4240: }
4241: }
4242: # --------------------------------------------------------------- Make the user
4243: my $reply=&modifyuser
4244: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
4245: $desiredhome,$email);
4246: unless ($reply eq 'ok') { return $reply; }
4247: # This will cause &modify_student_enrollment to get the uid from the
4248: # students environment
4249: $uid = undef if (!$forceid);
4250: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
4251: $gene,$usec,$end,$start,$type,$locktype,$cid);
4252: return $reply;
4253: }
4254:
4255: sub modify_student_enrollment {
4256: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
4257: my ($cdom,$cnum,$chome);
4258: if (!$cid) {
4259: unless ($cid=$env{'request.course.id'}) {
4260: return 'not_in_class';
4261: }
4262: $cdom=$env{'course.'.$cid.'.domain'};
4263: $cnum=$env{'course.'.$cid.'.num'};
4264: } else {
4265: ($cdom,$cnum)=split(/_/,$cid);
4266: }
4267: $chome=$env{'course.'.$cid.'.home'};
4268: if (!$chome) {
4269: $chome=&homeserver($cnum,$cdom);
4270: }
4271: if (!$chome) { return 'unknown_course'; }
4272: # Make sure the user exists
4273: my $uhome=&homeserver($uname,$udom);
4274: if (($uhome eq '') || ($uhome eq 'no_host')) {
4275: return 'error: no such user';
4276: }
4277: # Get student data if we were not given enough information
4278: if (!defined($first) || $first eq '' ||
4279: !defined($last) || $last eq '' ||
4280: !defined($uid) || $uid eq '' ||
4281: !defined($middle) || $middle eq '' ||
4282: !defined($gene) || $gene eq '') {
4283: # They did not supply us with enough data to enroll the student, so
4284: # we need to pick up more information.
4285: my %tmp = &get('environment',
4286: ['firstname','middlename','lastname', 'generation','id']
4287: ,$udom,$uname);
4288:
4289: #foreach (keys(%tmp)) {
4290: # &logthis("key $_ = ".$tmp{$_});
4291: #}
4292: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
4293: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
4294: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
4295: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
4296: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
4297: }
4298: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
4299: my $reply=cput('classlist',
4300: {"$uname:$udom" =>
4301: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
4302: $cdom,$cnum);
4303: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
4304: return 'error: '.$reply;
4305: } else {
4306: &devalidate_getsection_cache($udom,$uname,$cid);
4307: }
4308: # Add student role to user
4309: my $uurl='/'.$cid;
4310: $uurl=~s/\_/\//g;
4311: if ($usec) {
4312: $uurl.='/'.$usec;
4313: }
4314: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
4315: }
4316:
4317: sub format_name {
4318: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
4319: my $name;
4320: if ($first ne 'lastname') {
4321: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
4322: } else {
4323: if ($lastname=~/\S/) {
4324: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
4325: $name=~s/\s+,/,/;
4326: } else {
4327: $name.= $firstname.' '.$middlename.' '.$generation;
4328: }
4329: }
4330: $name=~s/^\s+//;
4331: $name=~s/\s+$//;
4332: $name=~s/\s+/ /g;
4333: return $name;
4334: }
4335:
4336: # ------------------------------------------------- Write to course preferences
4337:
4338: sub writecoursepref {
4339: my ($courseid,%prefs)=@_;
4340: $courseid=~s/^\///;
4341: $courseid=~s/\_/\//g;
4342: my ($cdomain,$cnum)=split(/\//,$courseid);
4343: my $chome=homeserver($cnum,$cdomain);
4344: if (($chome eq '') || ($chome eq 'no_host')) {
4345: return 'error: no such course';
4346: }
4347: my $cstring='';
4348: foreach (keys %prefs) {
4349: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
4350: }
4351: $cstring=~s/\&$//;
4352: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
4353: }
4354:
4355: # ---------------------------------------------------------- Make/modify course
4356:
4357: sub createcourse {
4358: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_;
4359: $url=&declutter($url);
4360: my $cid='';
4361: unless (&allowed('ccc',$udom)) {
4362: return 'refused';
4363: }
4364: # ------------------------------------------------------------------- Create ID
4365: my $uname=int(1+rand(9)).
4366: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
4367: substr($$.time,0,5).unpack("H8",pack("I32",time)).
4368: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4369: # ----------------------------------------------- Make sure that does not exist
4370: my $uhome=&homeserver($uname,$udom,'true');
4371: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4372: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
4373: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4374: $uhome=&homeserver($uname,$udom,'true');
4375: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4376: return 'error: unable to generate unique course-ID';
4377: }
4378: }
4379: # ------------------------------------------------ Check supplied server name
4380: $course_server = $env{'user.homeserver'} if (! defined($course_server));
4381: if (! exists($libserv{$course_server})) {
4382: return 'error:bad server name '.$course_server;
4383: }
4384: # ------------------------------------------------------------- Make the course
4385: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
4386: $course_server);
4387: unless ($reply eq 'ok') { return 'error: '.$reply; }
4388: $uhome=&homeserver($uname,$udom,'true');
4389: if (($uhome eq '') || ($uhome eq 'no_host')) {
4390: return 'error: no such course';
4391: }
4392: # ----------------------------------------------------------------- Course made
4393: # log existence
4394: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
4395: ':'.&escape($inst_code).':'.&escape($course_owner),$uhome);
4396: &flushcourselogs();
4397: # set toplevel url
4398: my $topurl=$url;
4399: unless ($nonstandard) {
4400: # ------------------------------------------ For standard courses, make top url
4401: my $mapurl=&clutter($url);
4402: if ($mapurl eq '/res/') { $mapurl=''; }
4403: $env{'form.initmap'}=(<<ENDINITMAP);
4404: <map>
4405: <resource id="1" type="start"></resource>
4406: <resource id="2" src="$mapurl"></resource>
4407: <resource id="3" type="finish"></resource>
4408: <link index="1" from="1" to="2"></link>
4409: <link index="2" from="2" to="3"></link>
4410: </map>
4411: ENDINITMAP
4412: $topurl=&declutter(
4413: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
4414: );
4415: }
4416: # ----------------------------------------------------------- Write preferences
4417: &writecoursepref($udom.'_'.$uname,
4418: ('description' => $description,
4419: 'url' => $topurl));
4420: return '/'.$udom.'/'.$uname;
4421: }
4422:
4423: # ---------------------------------------------------------- Assign Custom Role
4424:
4425: sub assigncustomrole {
4426: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
4427: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
4428: $end,$start,$deleteflag);
4429: }
4430:
4431: # ----------------------------------------------------------------- Revoke Role
4432:
4433: sub revokerole {
4434: my ($udom,$uname,$url,$role,$deleteflag)=@_;
4435: my $now=time;
4436: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
4437: }
4438:
4439: # ---------------------------------------------------------- Revoke Custom Role
4440:
4441: sub revokecustomrole {
4442: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
4443: my $now=time;
4444: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
4445: $deleteflag);
4446: }
4447:
4448: # ------------------------------------------------------------ Disk usage
4449: sub diskusage {
4450: my ($udom,$uname,$directoryRoot)=@_;
4451: $directoryRoot =~ s/\/$//;
4452: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
4453: return $listing;
4454: }
4455:
4456: sub is_locked {
4457: my ($file_name, $domain, $user) = @_;
4458: my @check;
4459: my $is_locked;
4460: push @check, $file_name;
4461: my %locked = &get('file_permissions',\@check,
4462: $env{'user.domain'},$env{'user.name'});
4463: my ($tmp)=keys(%locked);
4464: if ($tmp=~/^error:/) { undef(%locked); }
4465:
4466: if (ref($locked{$file_name}) eq 'ARRAY') {
4467: $is_locked = 'true';
4468: } else {
4469: $is_locked = 'false';
4470: }
4471: }
4472:
4473: # ------------------------------------------------------------- Mark as Read Only
4474:
4475: sub mark_as_readonly {
4476: my ($domain,$user,$files,$what) = @_;
4477: my %current_permissions = &dump('file_permissions',$domain,$user);
4478: my ($tmp)=keys(%current_permissions);
4479: if ($tmp=~/^error:/) { undef(%current_permissions); }
4480: foreach my $file (@{$files}) {
4481: push(@{$current_permissions{$file}},$what);
4482: }
4483: &put('file_permissions',\%current_permissions,$domain,$user);
4484: return;
4485: }
4486:
4487: # ------------------------------------------------------------Save Selected Files
4488:
4489: sub save_selected_files {
4490: my ($user, $path, @files) = @_;
4491: my $filename = $user."savedfiles";
4492: my @other_files = &files_not_in_path($user, $path);
4493: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4494: foreach my $file (@files) {
4495: print (OUT $env{'form.currentpath'}.$file."\n");
4496: }
4497: foreach my $file (@other_files) {
4498: print (OUT $file."\n");
4499: }
4500: close (OUT);
4501: return 'ok';
4502: }
4503:
4504: sub clear_selected_files {
4505: my ($user) = @_;
4506: my $filename = $user."savedfiles";
4507: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4508: print (OUT undef);
4509: close (OUT);
4510: return ("ok");
4511: }
4512:
4513: sub files_in_path {
4514: my ($user, $path) = @_;
4515: my $filename = $user."savedfiles";
4516: my %return_files;
4517: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4518: while (my $line_in = <IN>) {
4519: chomp ($line_in);
4520: my @paths_and_file = split (m!/!, $line_in);
4521: my $file_part = pop (@paths_and_file);
4522: my $path_part = join ('/', @paths_and_file);
4523: $path_part.='/';
4524: my $path_and_file = $path_part.$file_part;
4525: if ($path_part eq $path) {
4526: $return_files{$file_part}= 'selected';
4527: }
4528: }
4529: close (IN);
4530: return (\%return_files);
4531: }
4532:
4533: # called in portfolio select mode, to show files selected NOT in current directory
4534: sub files_not_in_path {
4535: my ($user, $path) = @_;
4536: my $filename = $user."savedfiles";
4537: my @return_files;
4538: my $path_part;
4539: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4540: while (<IN>) {
4541: #ok, I know it's clunky, but I want it to work
4542: my @paths_and_file = split m!/!, $_;
4543: my $file_part = pop (@paths_and_file);
4544: chomp ($file_part);
4545: my $path_part = join ('/', @paths_and_file);
4546: $path_part .= '/';
4547: my $path_and_file = $path_part.$file_part;
4548: if ($path_part ne $path) {
4549: push (@return_files, ($path_and_file));
4550: }
4551: }
4552: close (OUT);
4553: return (@return_files);
4554: }
4555:
4556: #--------------------------------------------------------------Get Marked as Read Only
4557:
4558:
4559: sub get_marked_as_readonly {
4560: my ($domain,$user,$what) = @_;
4561: my %current_permissions = &dump('file_permissions',$domain,$user);
4562: my ($tmp)=keys(%current_permissions);
4563: if ($tmp=~/^error:/) { undef(%current_permissions); }
4564: my @readonly_files;
4565: my $cmp1=$what;
4566: if (ref($what)) { $cmp1=join('',@{$what}) };
4567: while (my ($file_name,$value) = each(%current_permissions)) {
4568: if (ref($value) eq "ARRAY"){
4569: foreach my $stored_what (@{$value}) {
4570: my $cmp2=$stored_what;
4571: if (ref($stored_what)) { $cmp2=join('',@{$stored_what}) };
4572: if ($cmp1 eq $cmp2) {
4573: push(@readonly_files, $file_name);
4574: } elsif (!defined($what)) {
4575: push(@readonly_files, $file_name);
4576: }
4577: }
4578: }
4579: }
4580: return @readonly_files;
4581: }
4582: #-----------------------------------------------------------Get Marked as Read Only Hash
4583:
4584: sub get_marked_as_readonly_hash {
4585: my ($domain,$user,$what) = @_;
4586: my %current_permissions = &dump('file_permissions',$domain,$user);
4587: my ($tmp)=keys(%current_permissions);
4588: if ($tmp=~/^error:/) { undef(%current_permissions); }
4589:
4590: my %readonly_files;
4591: while (my ($file_name,$value) = each(%current_permissions)) {
4592: if (ref($value) eq "ARRAY"){
4593: foreach my $stored_what (@{$value}) {
4594: if ($stored_what eq $what) {
4595: $readonly_files{$file_name} = 'locked';
4596: } elsif (!defined($what)) {
4597: $readonly_files{$file_name} = 'locked';
4598: }
4599: }
4600: }
4601: }
4602: return %readonly_files;
4603: }
4604: # ------------------------------------------------------------ Unmark as Read Only
4605:
4606: sub unmark_as_readonly {
4607: # unmarks $file_name (if $file_name is defined), or all files locked by $what
4608: # for portfolio submissions, $what contains [$symb,$crsid]
4609: my ($domain,$user,$what,$file_name) = @_;
4610: my $symb_crs = $what;
4611: if (ref($what)) { $symb_crs=join('',@$what); }
4612: my %current_permissions = &dump('file_permissions',$domain,$user);
4613: my ($tmp)=keys(%current_permissions);
4614: if ($tmp=~/^error:/) { undef(%current_permissions); }
4615: my @readonly_files = &get_marked_as_readonly($domain,$user,$what);
4616: foreach my $file (@readonly_files) {
4617: if (defined($file_name) && ($file_name ne $file)) { next; }
4618: my $current_locks = $current_permissions{$file};
4619: my @new_locks;
4620: my @del_keys;
4621: if (ref($current_locks) eq "ARRAY"){
4622: foreach my $locker (@{$current_locks}) {
4623: my $compare=$locker;
4624: if (ref($locker)) { $compare=join('',@{$locker}) };
4625: if ($compare ne $symb_crs) {
4626: push(@new_locks, $locker);
4627: }
4628: }
4629: if (scalar(@new_locks) > 0) {
4630: $current_permissions{$file} = \@new_locks;
4631: } else {
4632: push(@del_keys, $file);
4633: &del('file_permissions',\@del_keys, $domain, $user);
4634: delete($current_permissions{$file});
4635: }
4636: }
4637: }
4638: &put('file_permissions',\%current_permissions,$domain,$user);
4639: return;
4640: }
4641:
4642: # ------------------------------------------------------------ Directory lister
4643:
4644: sub dirlist {
4645: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
4646:
4647: $uri=~s/^\///;
4648: $uri=~s/\/$//;
4649: my ($udom, $uname);
4650: (undef,$udom,$uname)=split(/\//,$uri);
4651: if(defined($userdomain)) {
4652: $udom = $userdomain;
4653: }
4654: if(defined($username)) {
4655: $uname = $username;
4656: }
4657:
4658: my $dirRoot = $perlvar{'lonDocRoot'};
4659: if(defined($alternateDirectoryRoot)) {
4660: $dirRoot = $alternateDirectoryRoot;
4661: $dirRoot =~ s/\/$//;
4662: }
4663:
4664: if($udom) {
4665: if($uname) {
4666: my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
4667: homeserver($uname,$udom));
4668: my @listing_results;
4669: if ($listing eq 'unknown_cmd') {
4670: $listing=reply('ls:'.$dirRoot.'/'.$uri,
4671: homeserver($uname,$udom));
4672: @listing_results = split(/:/,$listing);
4673: } else {
4674: @listing_results = map { &unescape($_); } split(/:/,$listing);
4675: }
4676: return @listing_results;
4677: } elsif(!defined($alternateDirectoryRoot)) {
4678: my $tryserver;
4679: my %allusers=();
4680: foreach $tryserver (keys %libserv) {
4681: if($hostdom{$tryserver} eq $udom) {
4682: my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
4683: $udom, $tryserver);
4684: my @listing_results;
4685: if ($listing eq 'unknown_cmd') {
4686: $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
4687: $udom, $tryserver);
4688: @listing_results = split(/:/,$listing);
4689: } else {
4690: @listing_results =
4691: map { &unescape($_); } split(/:/,$listing);
4692: }
4693: if ($listing_results[0] ne 'no_such_dir' &&
4694: $listing_results[0] ne 'empty' &&
4695: $listing_results[0] ne 'con_lost') {
4696: foreach (@listing_results) {
4697: my ($entry,@stat)=split(/&/,$_);
4698: $allusers{$entry}=1;
4699: }
4700: }
4701: }
4702: }
4703: my $alluserstr='';
4704: foreach (sort keys %allusers) {
4705: $alluserstr.=$_.'&user:';
4706: }
4707: $alluserstr=~s/:$//;
4708: return split(/:/,$alluserstr);
4709: } else {
4710: my @emptyResults = ();
4711: push(@emptyResults, 'missing user name');
4712: return split(':',@emptyResults);
4713: }
4714: } elsif(!defined($alternateDirectoryRoot)) {
4715: my $tryserver;
4716: my %alldom=();
4717: foreach $tryserver (keys %libserv) {
4718: $alldom{$hostdom{$tryserver}}=1;
4719: }
4720: my $alldomstr='';
4721: foreach (sort keys %alldom) {
4722: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
4723: }
4724: $alldomstr=~s/:$//;
4725: return split(/:/,$alldomstr);
4726: } else {
4727: my @emptyResults = ();
4728: push(@emptyResults, 'missing domain');
4729: return split(':',@emptyResults);
4730: }
4731: }
4732:
4733: # --------------------------------------------- GetFileTimestamp
4734: # This function utilizes dirlist and returns the date stamp for
4735: # when it was last modified. It will also return an error of -1
4736: # if an error occurs
4737:
4738: ##
4739: ## FIXME: This subroutine assumes its caller knows something about the
4740: ## directory structure of the home server for the student ($root).
4741: ## Not a good assumption to make. Since this is for looking up files
4742: ## in user directories, the full path should be constructed by lond, not
4743: ## whatever machine we request data from.
4744: ##
4745: sub GetFileTimestamp {
4746: my ($studentDomain,$studentName,$filename,$root)=@_;
4747: $studentDomain=~s/\W//g;
4748: $studentName=~s/\W//g;
4749: my $subdir=$studentName.'__';
4750: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4751: my $proname="$studentDomain/$subdir/$studentName";
4752: $proname .= '/'.$filename;
4753: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
4754: $studentName, $root);
4755: my @stats = split('&', $fileStat);
4756: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4757: # @stats contains first the filename, then the stat output
4758: return $stats[10]; # so this is 10 instead of 9.
4759: } else {
4760: return -1;
4761: }
4762: }
4763:
4764: sub stat_file {
4765: my ($uri) = @_;
4766: $uri = &clutter($uri);
4767:
4768: # we want just the url part without the unneeded accessor url bits
4769: if ($uri =~ m-^/adm/-) {
4770: $uri=~s-^/adm/wrapper/-/-;
4771: $uri=~s-^/adm/coursedocs/showdoc/-/-;
4772: }
4773: my ($udom,$uname,$file,$dir);
4774: if ($uri =~ m-^/(uploaded|editupload)/-) {
4775: ($udom,$uname,$file) =
4776: ($uri =~ m-/(?:uploaded|editupload)/?([^/]*)/?([^/]*)/?(.*)-);
4777: $file = 'userfiles/'.$file;
4778: $dir = &Apache::loncommon::propath($udom,$uname);
4779: }
4780: if ($uri =~ m-^/res/-) {
4781: ($udom,$uname) =
4782: ($uri =~ m-/(?:res)/?([^/]*)/?([^/]*)/-);
4783: $file = $uri;
4784: }
4785:
4786: if (!$udom || !$uname || !$file) {
4787: # unable to handle the uri
4788: return ();
4789: }
4790:
4791: my ($result) = &dirlist($file,$udom,$uname,$dir);
4792: my @stats = split('&', $result);
4793:
4794: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4795: shift(@stats); #filename is first
4796: return @stats;
4797: }
4798: return ();
4799: }
4800:
4801: # -------------------------------------------------------- Value of a Condition
4802:
4803: # gets the value of a specific preevaluated condition
4804: # stored in the string $env{user.state.<cid>}
4805: # or looks up a condition reference in the bighash and if if hasn't
4806: # already been evaluated recurses into docondval to get the value of
4807: # the condition, then memoizing it to
4808: # $env{user.state.<cid>.<condition>}
4809: sub directcondval {
4810: my $number=shift;
4811: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
4812: &Apache::lonuserstate::evalstate();
4813: }
4814: if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
4815: return $env{'user.state.'.$env{'request.course.id'}.".$number"};
4816: } elsif ($number =~ /^_/) {
4817: my $sub_condition;
4818: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4819: &GDBM_READER(),0640)) {
4820: $sub_condition=$bighash{'conditions'.$number};
4821: untie(%bighash);
4822: }
4823: my $value = &docondval($sub_condition);
4824: &appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
4825: return $value;
4826: }
4827: if ($env{'user.state.'.$env{'request.course.id'}}) {
4828: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
4829: } else {
4830: return 2;
4831: }
4832: }
4833:
4834: # get the collection of conditions for this resource
4835: sub condval {
4836: my $condidx=shift;
4837: my $allpathcond='';
4838: foreach my $cond (split(/\|/,$condidx)) {
4839: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
4840: $allpathcond.=
4841: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
4842: }
4843: }
4844: $allpathcond=~s/\|$//;
4845: return &docondval($allpathcond);
4846: }
4847:
4848: #evaluates an expression of conditions
4849: sub docondval {
4850: my ($allpathcond) = @_;
4851: my $result=0;
4852: if ($env{'request.course.id'}
4853: && defined($allpathcond)) {
4854: my $operand='|';
4855: my @stack;
4856: foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
4857: if ($chunk eq '(') {
4858: push @stack,($operand,$result);
4859: } elsif ($chunk eq ')') {
4860: my $before=pop @stack;
4861: if (pop @stack eq '&') {
4862: $result=$result>$before?$before:$result;
4863: } else {
4864: $result=$result>$before?$result:$before;
4865: }
4866: } elsif (($chunk eq '&') || ($chunk eq '|')) {
4867: $operand=$chunk;
4868: } else {
4869: my $new=directcondval($chunk);
4870: if ($operand eq '&') {
4871: $result=$result>$new?$new:$result;
4872: } else {
4873: $result=$result>$new?$result:$new;
4874: }
4875: }
4876: }
4877: }
4878: return $result;
4879: }
4880:
4881: # ---------------------------------------------------- Devalidate courseresdata
4882:
4883: sub devalidatecourseresdata {
4884: my ($coursenum,$coursedomain)=@_;
4885: my $hashid=$coursenum.':'.$coursedomain;
4886: &devalidate_cache_new('courseres',$hashid);
4887: }
4888:
4889: # --------------------------------------------------- Course Resourcedata Query
4890:
4891: sub get_courseresdata {
4892: my ($coursenum,$coursedomain)=@_;
4893: my $coursehom=&homeserver($coursenum,$coursedomain);
4894: my $hashid=$coursenum.':'.$coursedomain;
4895: my ($result,$cached)=&is_cached_new('courseres',$hashid);
4896: my %dumpreply;
4897: unless (defined($cached)) {
4898: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
4899: $result=\%dumpreply;
4900: my ($tmp) = keys(%dumpreply);
4901: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
4902: &do_cache_new('courseres',$hashid,$result,600);
4903: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4904: return $tmp;
4905: } elsif ($tmp =~ /^(error)/) {
4906: $result=undef;
4907: &do_cache_new('courseres',$hashid,$result,600);
4908: }
4909: }
4910: return $result;
4911: }
4912:
4913: sub devalidateuserresdata {
4914: my ($uname,$udom)=@_;
4915: my $hashid="$udom:$uname";
4916: &devalidate_cache_new('userres',$hashid);
4917: }
4918:
4919: sub get_userresdata {
4920: my ($uname,$udom)=@_;
4921: #most student don\'t have any data set, check if there is some data
4922: if (&EXT_cache_status($udom,$uname)) { return undef; }
4923:
4924: my $hashid="$udom:$uname";
4925: my ($result,$cached)=&is_cached_new('userres',$hashid);
4926: if (!defined($cached)) {
4927: my %resourcedata=&dump('resourcedata',$udom,$uname);
4928: $result=\%resourcedata;
4929: &do_cache_new('userres',$hashid,$result,600);
4930: }
4931: my ($tmp)=keys(%$result);
4932: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4933: return $result;
4934: }
4935: #error 2 occurs when the .db doesn't exist
4936: if ($tmp!~/error: 2 /) {
4937: &logthis("<font color=\"blue\">WARNING:".
4938: " Trying to get resource data for ".
4939: $uname." at ".$udom.": ".
4940: $tmp."</font>");
4941: } elsif ($tmp=~/error: 2 /) {
4942: #&EXT_cache_set($udom,$uname);
4943: &do_cache_new('userres',$hashid,undef,600);
4944: undef($tmp); # not really an error so don't send it back
4945: }
4946: return $tmp;
4947: }
4948:
4949: sub resdata {
4950: my ($name,$domain,$type,@which)=@_;
4951: my $result;
4952: if ($type eq 'course') {
4953: $result=&get_courseresdata($name,$domain);
4954: } elsif ($type eq 'user') {
4955: $result=&get_userresdata($name,$domain);
4956: }
4957: if (!ref($result)) { return $result; }
4958: foreach my $item (@which) {
4959: if (defined($result->{$item})) {
4960: return $result->{$item};
4961: }
4962: }
4963: return undef;
4964: }
4965:
4966: #
4967: # EXT resource caching routines
4968: #
4969:
4970: sub clear_EXT_cache_status {
4971: &delenv('cache.EXT.');
4972: }
4973:
4974: sub EXT_cache_status {
4975: my ($target_domain,$target_user) = @_;
4976: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4977: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
4978: # We know already the user has no data
4979: return 1;
4980: } else {
4981: return 0;
4982: }
4983: }
4984:
4985: sub EXT_cache_set {
4986: my ($target_domain,$target_user) = @_;
4987: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4988: #&appenv($cachename => time);
4989: }
4990:
4991: # --------------------------------------------------------- Value of a Variable
4992: sub EXT {
4993:
4994: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
4995: unless ($varname) { return ''; }
4996: #get real user name/domain, courseid and symb
4997: my $courseid;
4998: my $publicuser;
4999: if ($symbparm) {
5000: $symbparm=&get_symb_from_alias($symbparm);
5001: }
5002: if (!($uname && $udom)) {
5003: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
5004: &Apache::lonxml::whichuser($symbparm);
5005: if (!$symbparm) { $symbparm=$cursymb; }
5006: } else {
5007: $courseid=$env{'request.course.id'};
5008: }
5009: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
5010: my $rest;
5011: if (defined($therest[0])) {
5012: $rest=join('.',@therest);
5013: } else {
5014: $rest='';
5015: }
5016:
5017: my $qualifierrest=$qualifier;
5018: if ($rest) { $qualifierrest.='.'.$rest; }
5019: my $spacequalifierrest=$space;
5020: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
5021: if ($realm eq 'user') {
5022: # --------------------------------------------------------------- user.resource
5023: if ($space eq 'resource') {
5024: if ( (defined($Apache::lonhomework::parsing_a_problem)
5025: || defined($Apache::lonhomework::parsing_a_task))
5026: &&
5027: ($symbparm eq &symbread()) ) {
5028: return $Apache::lonhomework::history{$qualifierrest};
5029: } else {
5030: my %restored;
5031: if ($publicuser || $env{'request.state'} eq 'construct') {
5032: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
5033: } else {
5034: %restored=&restore($symbparm,$courseid,$udom,$uname);
5035: }
5036: return $restored{$qualifierrest};
5037: }
5038: # ----------------------------------------------------------------- user.access
5039: } elsif ($space eq 'access') {
5040: # FIXME - not supporting calls for a specific user
5041: return &allowed($qualifier,$rest);
5042: # ------------------------------------------ user.preferences, user.environment
5043: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
5044: if (($uname eq $env{'user.name'}) &&
5045: ($udom eq $env{'user.domain'})) {
5046: return $env{join('.',('environment',$qualifierrest))};
5047: } else {
5048: my %returnhash;
5049: if (!$publicuser) {
5050: %returnhash=&userenvironment($udom,$uname,
5051: $qualifierrest);
5052: }
5053: return $returnhash{$qualifierrest};
5054: }
5055: # ----------------------------------------------------------------- user.course
5056: } elsif ($space eq 'course') {
5057: # FIXME - not supporting calls for a specific user
5058: return $env{join('.',('request.course',$qualifier))};
5059: # ------------------------------------------------------------------- user.role
5060: } elsif ($space eq 'role') {
5061: # FIXME - not supporting calls for a specific user
5062: my ($role,$where)=split(/\./,$env{'request.role'});
5063: if ($qualifier eq 'value') {
5064: return $role;
5065: } elsif ($qualifier eq 'extent') {
5066: return $where;
5067: }
5068: # ----------------------------------------------------------------- user.domain
5069: } elsif ($space eq 'domain') {
5070: return $udom;
5071: # ------------------------------------------------------------------- user.name
5072: } elsif ($space eq 'name') {
5073: return $uname;
5074: # ---------------------------------------------------- Any other user namespace
5075: } else {
5076: my %reply;
5077: if (!$publicuser) {
5078: %reply=&get($space,[$qualifierrest],$udom,$uname);
5079: }
5080: return $reply{$qualifierrest};
5081: }
5082: } elsif ($realm eq 'query') {
5083: # ---------------------------------------------- pull stuff out of query string
5084: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
5085: [$spacequalifierrest]);
5086: return $env{'form.'.$spacequalifierrest};
5087: } elsif ($realm eq 'request') {
5088: # ------------------------------------------------------------- request.browser
5089: if ($space eq 'browser') {
5090: if ($qualifier eq 'textremote') {
5091: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
5092: return 1;
5093: } else {
5094: return 0;
5095: }
5096: } else {
5097: return $env{'browser.'.$qualifier};
5098: }
5099: # ------------------------------------------------------------ request.filename
5100: } else {
5101: return $env{'request.'.$spacequalifierrest};
5102: }
5103: } elsif ($realm eq 'course') {
5104: # ---------------------------------------------------------- course.description
5105: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
5106: } elsif ($realm eq 'resource') {
5107:
5108: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
5109: if (!$symbparm) { $symbparm=&symbread(); }
5110: }
5111:
5112: if ($space eq 'title') {
5113: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
5114: return &gettitle($symbparm);
5115: }
5116:
5117: if ($space eq 'map') {
5118: my ($map) = &decode_symb($symbparm);
5119: return &symbread($map);
5120: }
5121:
5122: my ($section, $group, @groups);
5123: my ($courselevelm,$courselevel);
5124: if ($symbparm && defined($courseid) &&
5125: $courseid eq $env{'request.course.id'}) {
5126:
5127: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
5128:
5129: # ----------------------------------------------------- Cascading lookup scheme
5130: my $symbp=$symbparm;
5131: my $mapp=(&decode_symb($symbp))[0];
5132:
5133: my $symbparm=$symbp.'.'.$spacequalifierrest;
5134: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
5135:
5136: if (($env{'user.name'} eq $uname) &&
5137: ($env{'user.domain'} eq $udom)) {
5138: $section=$env{'request.course.sec'};
5139: @groups=&sort_course_groups($env{'request.course.groups'},$courseid);
5140: } else {
5141: if (! defined($usection)) {
5142: $section=&getsection($udom,$uname,$courseid);
5143: } else {
5144: $section = $usection;
5145: }
5146: my $grouplist = &get_users_groups($udom,$uname,$courseid);
5147: if ($grouplist) {
5148: @groups=&sort_course_groups($grouplist,$courseid);
5149: }
5150: }
5151:
5152: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
5153: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
5154: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
5155:
5156: $courselevel=$courseid.'.'.$spacequalifierrest;
5157: my $courselevelr=$courseid.'.'.$symbparm;
5158: $courselevelm=$courseid.'.'.$mapparm;
5159:
5160: # ----------------------------------------------------------- first, check user
5161:
5162: my $userreply=&resdata($uname,$udom,'user',
5163: ($courselevelr,$courselevelm,
5164: $courselevel));
5165: if (defined($userreply)) { return $userreply; }
5166:
5167: # ------------------------------------------------ second, check some of course
5168: my $coursereply;
5169: if (@groups > 0) {
5170: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
5171: $mapparm,$spacequalifierrest);
5172: if (defined($coursereply)) { return $coursereply; }
5173: }
5174:
5175: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
5176: $env{'course.'.$courseid.'.domain'},
5177: 'course',
5178: ($seclevelr,$seclevelm,$seclevel,
5179: $courselevelr));
5180: if (defined($coursereply)) { return $coursereply; }
5181:
5182: # ------------------------------------------------------ third, check map parms
5183: my %parmhash=();
5184: my $thisparm='';
5185: if (tie(%parmhash,'GDBM_File',
5186: $env{'request.course.fn'}.'_parms.db',
5187: &GDBM_READER(),0640)) {
5188: $thisparm=$parmhash{$symbparm};
5189: untie(%parmhash);
5190: }
5191: if ($thisparm) { return $thisparm; }
5192: }
5193: # ------------------------------------------ fourth, look in resource metadata
5194:
5195: $spacequalifierrest=~s/\./\_/;
5196: my $filename;
5197: if (!$symbparm) { $symbparm=&symbread(); }
5198: if ($symbparm) {
5199: $filename=(&decode_symb($symbparm))[2];
5200: } else {
5201: $filename=$env{'request.filename'};
5202: }
5203: my $metadata=&metadata($filename,$spacequalifierrest);
5204: if (defined($metadata)) { return $metadata; }
5205: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
5206: if (defined($metadata)) { return $metadata; }
5207:
5208: # ---------------------------------------------- fourth, look in rest pf course
5209: if ($symbparm && defined($courseid) &&
5210: $courseid eq $env{'request.course.id'}) {
5211: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
5212: $env{'course.'.$courseid.'.domain'},
5213: 'course',
5214: ($courselevelm,$courselevel));
5215: if (defined($coursereply)) { return $coursereply; }
5216: }
5217: # ------------------------------------------------------------------ Cascade up
5218: unless ($space eq '0') {
5219: my @parts=split(/_/,$space);
5220: my $id=pop(@parts);
5221: my $part=join('_',@parts);
5222: if ($part eq '') { $part='0'; }
5223: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
5224: $symbparm,$udom,$uname,$section,1);
5225: if (defined($partgeneral)) { return $partgeneral; }
5226: }
5227: if ($recurse) { return undef; }
5228: my $pack_def=&packages_tab_default($filename,$varname);
5229: if (defined($pack_def)) { return $pack_def; }
5230:
5231: # ---------------------------------------------------- Any other user namespace
5232: } elsif ($realm eq 'environment') {
5233: # ----------------------------------------------------------------- environment
5234: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
5235: return $env{'environment.'.$spacequalifierrest};
5236: } else {
5237: my %returnhash=&userenvironment($udom,$uname,
5238: $spacequalifierrest);
5239: return $returnhash{$spacequalifierrest};
5240: }
5241: } elsif ($realm eq 'system') {
5242: # ----------------------------------------------------------------- system.time
5243: if ($space eq 'time') {
5244: return time;
5245: }
5246: } elsif ($realm eq 'server') {
5247: # ----------------------------------------------------------------- system.time
5248: if ($space eq 'name') {
5249: return $ENV{'SERVER_NAME'};
5250: }
5251: }
5252: return '';
5253: }
5254:
5255: sub check_group_parms {
5256: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
5257: my @groupitems = ();
5258: my $resultitem;
5259: my @levels = ($symbparm,$mapparm,$what);
5260: foreach my $group (@{$groups}) {
5261: foreach my $level (@levels) {
5262: my $item = $courseid.'.['.$group.'].'.$level;
5263: push(@groupitems,$item);
5264: }
5265: }
5266: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
5267: $env{'course.'.$courseid.'.domain'},
5268: 'course',@groupitems);
5269: return $coursereply;
5270: }
5271:
5272: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
5273: my ($grouplist,$courseid) = @_;
5274: my @groups = sort(split(/:/,$grouplist));
5275: return @groups;
5276: }
5277:
5278: sub packages_tab_default {
5279: my ($uri,$varname)=@_;
5280: my (undef,$part,$name)=split(/\./,$varname);
5281: my $packages=&metadata($uri,'packages');
5282: foreach my $package (split(/,/,$packages)) {
5283: my ($pack_type,$pack_part)=split(/_/,$package,2);
5284: if (defined($packagetab{"$pack_type&$name&default"})) {
5285: return $packagetab{"$pack_type&$name&default"};
5286: }
5287: if ($pack_type eq 'part') { $pack_part='0'; }
5288: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
5289: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
5290: }
5291: }
5292: return undef;
5293: }
5294:
5295: sub add_prefix_and_part {
5296: my ($prefix,$part)=@_;
5297: my $keyroot;
5298: if (defined($prefix) && $prefix !~ /^__/) {
5299: # prefix that has a part already
5300: $keyroot=$prefix;
5301: } elsif (defined($prefix)) {
5302: # prefix that is missing a part
5303: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
5304: } else {
5305: # no prefix at all
5306: if (defined($part)) { $keyroot='_'.$part; }
5307: }
5308: return $keyroot;
5309: }
5310:
5311: # ---------------------------------------------------------------- Get metadata
5312:
5313: my %metaentry;
5314: sub metadata {
5315: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
5316: $uri=&declutter($uri);
5317: # if it is a non metadata possible uri return quickly
5318: if (($uri eq '') ||
5319: (($uri =~ m|^/*adm/|) &&
5320: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
5321: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
5322: ($uri =~ m|home/[^/]+/public_html/|)) {
5323: return undef;
5324: }
5325: my $filename=$uri;
5326: $uri=~s/\.meta$//;
5327: #
5328: # Is the metadata already cached?
5329: # Look at timestamp of caching
5330: # Everything is cached by the main uri, libraries are never directly cached
5331: #
5332: if (!defined($liburi)) {
5333: my ($result,$cached)=&is_cached_new('meta',$uri);
5334: if (defined($cached)) { return $result->{':'.$what}; }
5335: }
5336: {
5337: #
5338: # Is this a recursive call for a library?
5339: #
5340: # if (! exists($metacache{$uri})) {
5341: # $metacache{$uri}={};
5342: # }
5343: if ($liburi) {
5344: $liburi=&declutter($liburi);
5345: $filename=$liburi;
5346: } else {
5347: &devalidate_cache_new('meta',$uri);
5348: undef(%metaentry);
5349: }
5350: my %metathesekeys=();
5351: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
5352: my $metastring;
5353: if ($uri !~ m -^(uploaded|editupload)/-) {
5354: my $file=&filelocation('',&clutter($filename));
5355: #push(@{$metaentry{$uri.'.file'}},$file);
5356: $metastring=&getfile($file);
5357: }
5358: my $parser=HTML::LCParser->new(\$metastring);
5359: my $token;
5360: undef %metathesekeys;
5361: while ($token=$parser->get_token) {
5362: if ($token->[0] eq 'S') {
5363: if (defined($token->[2]->{'package'})) {
5364: #
5365: # This is a package - get package info
5366: #
5367: my $package=$token->[2]->{'package'};
5368: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5369: if (defined($token->[2]->{'id'})) {
5370: $keyroot.='_'.$token->[2]->{'id'};
5371: }
5372: if ($metaentry{':packages'}) {
5373: $metaentry{':packages'}.=','.$package.$keyroot;
5374: } else {
5375: $metaentry{':packages'}=$package.$keyroot;
5376: }
5377: foreach (sort keys %packagetab) {
5378: my $part=$keyroot;
5379: $part=~s/^\_//;
5380: if ($_=~/^\Q$package\E\&/ ||
5381: $_=~/^\Q$package\E_0\&/) {
5382: my ($pack,$name,$subp)=split(/\&/,$_);
5383: # ignore package.tab specified default values
5384: # here &package_tab_default() will fetch those
5385: if ($subp eq 'default') { next; }
5386: my $value=$packagetab{$_};
5387: my $unikey;
5388: if ($pack =~ /_0$/) {
5389: $unikey='parameter_0_'.$name;
5390: $part=0;
5391: } else {
5392: $unikey='parameter'.$keyroot.'_'.$name;
5393: }
5394: if ($subp eq 'display') {
5395: $value.=' [Part: '.$part.']';
5396: }
5397: $metaentry{':'.$unikey.'.part'}=$part;
5398: $metathesekeys{$unikey}=1;
5399: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
5400: $metaentry{':'.$unikey.'.'.$subp}=$value;
5401: }
5402: if (defined($metaentry{':'.$unikey.'.default'})) {
5403: $metaentry{':'.$unikey}=
5404: $metaentry{':'.$unikey.'.default'};
5405: }
5406: }
5407: }
5408: } else {
5409: #
5410: # This is not a package - some other kind of start tag
5411: #
5412: my $entry=$token->[1];
5413: my $unikey;
5414: if ($entry eq 'import') {
5415: $unikey='';
5416: } else {
5417: $unikey=$entry;
5418: }
5419: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5420:
5421: if (defined($token->[2]->{'id'})) {
5422: $unikey.='_'.$token->[2]->{'id'};
5423: }
5424:
5425: if ($entry eq 'import') {
5426: #
5427: # Importing a library here
5428: #
5429: if ($depthcount<20) {
5430: my $location=$parser->get_text('/import');
5431: my $dir=$filename;
5432: $dir=~s|[^/]*$||;
5433: $location=&filelocation($dir,$location);
5434: foreach (sort(split(/\,/,&metadata($uri,'keys',
5435: $location,$unikey,
5436: $depthcount+1)))) {
5437: $metaentry{':'.$_}=$metaentry{':'.$_};
5438: $metathesekeys{$_}=1;
5439: }
5440: }
5441: } else {
5442:
5443: if (defined($token->[2]->{'name'})) {
5444: $unikey.='_'.$token->[2]->{'name'};
5445: }
5446: $metathesekeys{$unikey}=1;
5447: foreach (@{$token->[3]}) {
5448: $metaentry{':'.$unikey.'.'.$_}=$token->[2]->{$_};
5449: }
5450: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
5451: my $default=$metaentry{':'.$unikey.'.default'};
5452: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
5453: # only ws inside the tag, and not in default, so use default
5454: # as value
5455: $metaentry{':'.$unikey}=$default;
5456: } else {
5457: # either something interesting inside the tag or default
5458: # uninteresting
5459: $metaentry{':'.$unikey}=$internaltext;
5460: }
5461: # end of not-a-package not-a-library import
5462: }
5463: # end of not-a-package start tag
5464: }
5465: # the next is the end of "start tag"
5466: }
5467: }
5468: my ($extension) = ($uri =~ /\.(\w+)$/);
5469: foreach my $key (sort(keys(%packagetab))) {
5470: #no specific packages #how's our extension
5471: if ($key!~/^extension_\Q$extension\E&/) { next; }
5472: &metadata_create_package_def($uri,$key,'extension_'.$extension,
5473: \%metathesekeys);
5474: }
5475: if (!exists($metaentry{':packages'})) {
5476: foreach my $key (sort(keys(%packagetab))) {
5477: #no specific packages well let's get default then
5478: if ($key!~/^default&/) { next; }
5479: &metadata_create_package_def($uri,$key,'default',
5480: \%metathesekeys);
5481: }
5482: }
5483: # are there custom rights to evaluate
5484: if ($metaentry{':copyright'} eq 'custom') {
5485:
5486: #
5487: # Importing a rights file here
5488: #
5489: unless ($depthcount) {
5490: my $location=$metaentry{':customdistributionfile'};
5491: my $dir=$filename;
5492: $dir=~s|[^/]*$||;
5493: $location=&filelocation($dir,$location);
5494: foreach (sort(split(/\,/,&metadata($uri,'keys',
5495: $location,'_rights',
5496: $depthcount+1)))) {
5497: #$metaentry{':'.$_}=$metacache{$uri}->{':'.$_};
5498: $metathesekeys{$_}=1;
5499: }
5500: }
5501: }
5502: $metaentry{':keys'}=join(',',keys %metathesekeys);
5503: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
5504: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
5505: &do_cache_new('meta',$uri,\%metaentry,60*60);
5506: # this is the end of "was not already recently cached
5507: }
5508: return $metaentry{':'.$what};
5509: }
5510:
5511: sub metadata_create_package_def {
5512: my ($uri,$key,$package,$metathesekeys)=@_;
5513: my ($pack,$name,$subp)=split(/\&/,$key);
5514: if ($subp eq 'default') { next; }
5515:
5516: if (defined($metaentry{':packages'})) {
5517: $metaentry{':packages'}.=','.$package;
5518: } else {
5519: $metaentry{':packages'}=$package;
5520: }
5521: my $value=$packagetab{$key};
5522: my $unikey;
5523: $unikey='parameter_0_'.$name;
5524: $metaentry{':'.$unikey.'.part'}=0;
5525: $$metathesekeys{$unikey}=1;
5526: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
5527: $metaentry{':'.$unikey.'.'.$subp}=$value;
5528: }
5529: if (defined($metaentry{':'.$unikey.'.default'})) {
5530: $metaentry{':'.$unikey}=
5531: $metaentry{':'.$unikey.'.default'};
5532: }
5533: }
5534:
5535: sub metadata_generate_part0 {
5536: my ($metadata,$metacache,$uri) = @_;
5537: my %allnames;
5538: foreach my $metakey (sort keys %$metadata) {
5539: if ($metakey=~/^parameter\_(.*)/) {
5540: my $part=$$metacache{':'.$metakey.'.part'};
5541: my $name=$$metacache{':'.$metakey.'.name'};
5542: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
5543: $allnames{$name}=$part;
5544: }
5545: }
5546: }
5547: foreach my $name (keys(%allnames)) {
5548: $$metadata{"parameter_0_$name"}=1;
5549: my $key=":parameter_0_$name";
5550: $$metacache{"$key.part"}='0';
5551: $$metacache{"$key.name"}=$name;
5552: $$metacache{"$key.type"}=$$metacache{':parameter_'.
5553: $allnames{$name}.'_'.$name.
5554: '.type'};
5555: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
5556: '.display'};
5557: my $expr='[Part: '.$allnames{$name}.']';
5558: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
5559: $$metacache{"$key.display"}=$olddis;
5560: }
5561: }
5562:
5563: # ------------------------------------------------- Get the title of a resource
5564:
5565: sub gettitle {
5566: my $urlsymb=shift;
5567: my $symb=&symbread($urlsymb);
5568: if ($symb) {
5569: my $key=$env{'request.course.id'}."\0".$symb;
5570: my ($result,$cached)=&is_cached_new('title',$key);
5571: if (defined($cached)) {
5572: return $result;
5573: }
5574: my ($map,$resid,$url)=&decode_symb($symb);
5575: my $title='';
5576: my %bighash;
5577: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5578: &GDBM_READER(),0640)) {
5579: my $mapid=$bighash{'map_pc_'.&clutter($map)};
5580: $title=$bighash{'title_'.$mapid.'.'.$resid};
5581: untie %bighash;
5582: }
5583: $title=~s/\&colon\;/\:/gs;
5584: if ($title) {
5585: return &do_cache_new('title',$key,$title,600);
5586: }
5587: $urlsymb=$url;
5588: }
5589: my $title=&metadata($urlsymb,'title');
5590: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
5591: return $title;
5592: }
5593:
5594: sub get_slot {
5595: my ($which,$cnum,$cdom)=@_;
5596: if (!$cnum || !$cdom) {
5597: (undef,my $courseid)=&Apache::lonxml::whichuser();
5598: $cdom=$env{'course.'.$courseid.'.domain'};
5599: $cnum=$env{'course.'.$courseid.'.num'};
5600: }
5601: my $key=join("\0",'slots',$cdom,$cnum,$which);
5602: my %slotinfo;
5603: if (exists($remembered{$key})) {
5604: $slotinfo{$which} = $remembered{$key};
5605: } else {
5606: %slotinfo=&get('slots',[$which],$cdom,$cnum);
5607: &Apache::lonhomework::showhash(%slotinfo);
5608: my ($tmp)=keys(%slotinfo);
5609: if ($tmp=~/^error:/) { return (); }
5610: $remembered{$key} = $slotinfo{$which};
5611: }
5612: if (ref($slotinfo{$which}) eq 'HASH') {
5613: return %{$slotinfo{$which}};
5614: }
5615: return $slotinfo{$which};
5616: }
5617: # ------------------------------------------------- Update symbolic store links
5618:
5619: sub symblist {
5620: my ($mapname,%newhash)=@_;
5621: $mapname=&deversion(&declutter($mapname));
5622: my %hash;
5623: if (($env{'request.course.fn'}) && (%newhash)) {
5624: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5625: &GDBM_WRCREAT(),0640)) {
5626: foreach my $url (keys %newhash) {
5627: next if ($url eq 'last_known'
5628: && $env{'form.no_update_last_known'});
5629: $hash{declutter($url)}=&encode_symb($mapname,
5630: $newhash{$url}->[1],
5631: $newhash{$url}->[0]);
5632: }
5633: if (untie(%hash)) {
5634: return 'ok';
5635: }
5636: }
5637: }
5638: return 'error';
5639: }
5640:
5641: # --------------------------------------------------------------- Verify a symb
5642:
5643: sub symbverify {
5644: my ($symb,$thisurl)=@_;
5645: my $thisfn=$thisurl;
5646: # wrapper not part of symbs
5647: $thisfn=~s/^\/adm\/wrapper//;
5648: $thisfn=~s/^\/adm\/coursedocs\/showdoc\///;
5649: $thisfn=&declutter($thisfn);
5650: # direct jump to resource in page or to a sequence - will construct own symbs
5651: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
5652: # check URL part
5653: my ($map,$resid,$url)=&decode_symb($symb);
5654:
5655: unless ($url eq $thisfn) { return 0; }
5656:
5657: $symb=&symbclean($symb);
5658: $thisurl=&deversion($thisurl);
5659: $thisfn=&deversion($thisfn);
5660:
5661: my %bighash;
5662: my $okay=0;
5663:
5664: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5665: &GDBM_READER(),0640)) {
5666: my $ids=$bighash{'ids_'.&clutter($thisurl)};
5667: unless ($ids) {
5668: $ids=$bighash{'ids_/'.$thisurl};
5669: }
5670: if ($ids) {
5671: # ------------------------------------------------------------------- Has ID(s)
5672: foreach (split(/\,/,$ids)) {
5673: my ($mapid,$resid)=split(/\./,$_);
5674: if (
5675: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
5676: eq $symb) {
5677: if (($env{'request.role.adv'}) ||
5678: $bighash{'encrypted_'.$_} eq $env{'request.enc'}) {
5679: $okay=1;
5680: }
5681: }
5682: }
5683: }
5684: untie(%bighash);
5685: }
5686: return $okay;
5687: }
5688:
5689: # --------------------------------------------------------------- Clean-up symb
5690:
5691: sub symbclean {
5692: my $symb=shift;
5693: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
5694: # remove version from map
5695: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
5696:
5697: # remove version from URL
5698: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
5699:
5700: # remove wrapper
5701:
5702: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
5703: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
5704: return $symb;
5705: }
5706:
5707: # ---------------------------------------------- Split symb to find map and url
5708:
5709: sub encode_symb {
5710: my ($map,$resid,$url)=@_;
5711: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
5712: }
5713:
5714: sub decode_symb {
5715: my $symb=shift;
5716: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
5717: my ($map,$resid,$url)=split(/___/,$symb);
5718: return (&fixversion($map),$resid,&fixversion($url));
5719: }
5720:
5721: sub fixversion {
5722: my $fn=shift;
5723: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
5724: my %bighash;
5725: my $uri=&clutter($fn);
5726: my $key=$env{'request.course.id'}.'_'.$uri;
5727: # is this cached?
5728: my ($result,$cached)=&is_cached_new('courseresversion',$key);
5729: if (defined($cached)) { return $result; }
5730: # unfortunately not cached, or expired
5731: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5732: &GDBM_READER(),0640)) {
5733: if ($bighash{'version_'.$uri}) {
5734: my $version=$bighash{'version_'.$uri};
5735: unless (($version eq 'mostrecent') ||
5736: ($version==&getversion($uri))) {
5737: $uri=~s/\.(\w+)$/\.$version\.$1/;
5738: }
5739: }
5740: untie %bighash;
5741: }
5742: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
5743: }
5744:
5745: sub deversion {
5746: my $url=shift;
5747: $url=~s/\.\d+\.(\w+)$/\.$1/;
5748: return $url;
5749: }
5750:
5751: # ------------------------------------------------------ Return symb list entry
5752:
5753: sub symbread {
5754: my ($thisfn,$donotrecurse)=@_;
5755: my $cache_str='request.symbread.cached.'.$thisfn;
5756: if (defined($env{$cache_str})) { return $env{$cache_str}; }
5757: # no filename provided? try from environment
5758: unless ($thisfn) {
5759: if ($env{'request.symb'}) {
5760: return $env{$cache_str}=&symbclean($env{'request.symb'});
5761: }
5762: $thisfn=$env{'request.filename'};
5763: }
5764: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
5765: # is that filename actually a symb? Verify, clean, and return
5766: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
5767: if (&symbverify($thisfn,$1)) {
5768: return $env{$cache_str}=&symbclean($thisfn);
5769: }
5770: }
5771: $thisfn=declutter($thisfn);
5772: my %hash;
5773: my %bighash;
5774: my $syval='';
5775: if (($env{'request.course.fn'}) && ($thisfn)) {
5776: my $targetfn = $thisfn;
5777: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
5778: $targetfn = 'adm/wrapper/'.$thisfn;
5779: }
5780: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
5781: $targetfn=$1;
5782: }
5783: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5784: &GDBM_READER(),0640)) {
5785: $syval=$hash{$targetfn};
5786: untie(%hash);
5787: }
5788: # ---------------------------------------------------------- There was an entry
5789: if ($syval) {
5790: #unless ($syval=~/\_\d+$/) {
5791: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
5792: #&appenv('request.ambiguous' => $thisfn);
5793: #return $env{$cache_str}='';
5794: #}
5795: #$syval.=$1;
5796: #}
5797: } else {
5798: # ------------------------------------------------------- Was not in symb table
5799: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5800: &GDBM_READER(),0640)) {
5801: # ---------------------------------------------- Get ID(s) for current resource
5802: my $ids=$bighash{'ids_'.&clutter($thisfn)};
5803: unless ($ids) {
5804: $ids=$bighash{'ids_/'.$thisfn};
5805: }
5806: unless ($ids) {
5807: # alias?
5808: $ids=$bighash{'mapalias_'.$thisfn};
5809: }
5810: if ($ids) {
5811: # ------------------------------------------------------------------- Has ID(s)
5812: my @possibilities=split(/\,/,$ids);
5813: if ($#possibilities==0) {
5814: # ----------------------------------------------- There is only one possibility
5815: my ($mapid,$resid)=split(/\./,$ids);
5816: $syval=&encode_symb($bighash{'map_id_'.$mapid},
5817: $resid,$thisfn);
5818: } elsif (!$donotrecurse) {
5819: # ------------------------------------------ There is more than one possibility
5820: my $realpossible=0;
5821: foreach (@possibilities) {
5822: my $file=$bighash{'src_'.$_};
5823: if (&allowed('bre',$file)) {
5824: my ($mapid,$resid)=split(/\./,$_);
5825: if ($bighash{'map_type_'.$mapid} ne 'page') {
5826: $realpossible++;
5827: $syval=&encode_symb($bighash{'map_id_'.$mapid},
5828: $resid,$thisfn);
5829: }
5830: }
5831: }
5832: if ($realpossible!=1) { $syval=''; }
5833: } else {
5834: $syval='';
5835: }
5836: }
5837: untie(%bighash)
5838: }
5839: }
5840: if ($syval) {
5841: return $env{$cache_str}=$syval;
5842: }
5843: }
5844: &appenv('request.ambiguous' => $thisfn);
5845: return $env{$cache_str}='';
5846: }
5847:
5848: # ---------------------------------------------------------- Return random seed
5849:
5850: sub numval {
5851: my $txt=shift;
5852: $txt=~tr/A-J/0-9/;
5853: $txt=~tr/a-j/0-9/;
5854: $txt=~tr/K-T/0-9/;
5855: $txt=~tr/k-t/0-9/;
5856: $txt=~tr/U-Z/0-5/;
5857: $txt=~tr/u-z/0-5/;
5858: $txt=~s/\D//g;
5859: if ($_64bit) { if ($txt > 2**32) { return -1; } }
5860: return int($txt);
5861: }
5862:
5863: sub numval2 {
5864: my $txt=shift;
5865: $txt=~tr/A-J/0-9/;
5866: $txt=~tr/a-j/0-9/;
5867: $txt=~tr/K-T/0-9/;
5868: $txt=~tr/k-t/0-9/;
5869: $txt=~tr/U-Z/0-5/;
5870: $txt=~tr/u-z/0-5/;
5871: $txt=~s/\D//g;
5872: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5873: my $total;
5874: foreach my $val (@txts) { $total+=$val; }
5875: if ($_64bit) { if ($total > 2**32) { return -1; } }
5876: return int($total);
5877: }
5878:
5879: sub numval3 {
5880: use integer;
5881: my $txt=shift;
5882: $txt=~tr/A-J/0-9/;
5883: $txt=~tr/a-j/0-9/;
5884: $txt=~tr/K-T/0-9/;
5885: $txt=~tr/k-t/0-9/;
5886: $txt=~tr/U-Z/0-5/;
5887: $txt=~tr/u-z/0-5/;
5888: $txt=~s/\D//g;
5889: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5890: my $total;
5891: foreach my $val (@txts) { $total+=$val; }
5892: if ($_64bit) { $total=(($total<<32)>>32); }
5893: return $total;
5894: }
5895:
5896: sub digest {
5897: my ($data)=@_;
5898: my $digest=&Digest::MD5::md5($data);
5899: my ($a,$b,$c,$d)=unpack("iiii",$digest);
5900: my ($e,$f);
5901: {
5902: use integer;
5903: $e=($a+$b);
5904: $f=($c+$d);
5905: if ($_64bit) {
5906: $e=(($e<<32)>>32);
5907: $f=(($f<<32)>>32);
5908: }
5909: }
5910: if (wantarray) {
5911: return ($e,$f);
5912: } else {
5913: my $g;
5914: {
5915: use integer;
5916: $g=($e+$f);
5917: if ($_64bit) {
5918: $g=(($g<<32)>>32);
5919: }
5920: }
5921: return $g;
5922: }
5923: }
5924:
5925: sub latest_rnd_algorithm_id {
5926: return '64bit5';
5927: }
5928:
5929: sub get_rand_alg {
5930: my ($courseid)=@_;
5931: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
5932: if ($courseid) {
5933: return $env{"course.$courseid.rndseed"};
5934: }
5935: return &latest_rnd_algorithm_id();
5936: }
5937:
5938: sub validCODE {
5939: my ($CODE)=@_;
5940: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
5941: return 0;
5942: }
5943:
5944: sub getCODE {
5945: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
5946: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
5947: defined($Apache::lonhomework::parsing_a_task) ) &&
5948: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
5949: return $Apache::lonhomework::history{'resource.CODE'};
5950: }
5951: return undef;
5952: }
5953:
5954: sub rndseed {
5955: my ($symb,$courseid,$domain,$username)=@_;
5956:
5957: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
5958: if (!$symb) {
5959: unless ($symb=$wsymb) { return time; }
5960: }
5961: if (!$courseid) { $courseid=$wcourseid; }
5962: if (!$domain) { $domain=$wdomain; }
5963: if (!$username) { $username=$wusername }
5964: my $which=&get_rand_alg();
5965: if (defined(&getCODE())) {
5966: if ($which eq '64bit5') {
5967: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
5968: } elsif ($which eq '64bit4') {
5969: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
5970: } else {
5971: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
5972: }
5973: } elsif ($which eq '64bit5') {
5974: return &rndseed_64bit5($symb,$courseid,$domain,$username);
5975: } elsif ($which eq '64bit4') {
5976: return &rndseed_64bit4($symb,$courseid,$domain,$username);
5977: } elsif ($which eq '64bit3') {
5978: return &rndseed_64bit3($symb,$courseid,$domain,$username);
5979: } elsif ($which eq '64bit2') {
5980: return &rndseed_64bit2($symb,$courseid,$domain,$username);
5981: } elsif ($which eq '64bit') {
5982: return &rndseed_64bit($symb,$courseid,$domain,$username);
5983: }
5984: return &rndseed_32bit($symb,$courseid,$domain,$username);
5985: }
5986:
5987: sub rndseed_32bit {
5988: my ($symb,$courseid,$domain,$username)=@_;
5989: {
5990: use integer;
5991: my $symbchck=unpack("%32C*",$symb) << 27;
5992: my $symbseed=numval($symb) << 22;
5993: my $namechck=unpack("%32C*",$username) << 17;
5994: my $nameseed=numval($username) << 12;
5995: my $domainseed=unpack("%32C*",$domain) << 7;
5996: my $courseseed=unpack("%32C*",$courseid);
5997: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
5998: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5999: #&Apache::lonxml::debug("rndseed :$num:$symb");
6000: if ($_64bit) { $num=(($num<<32)>>32); }
6001: return $num;
6002: }
6003: }
6004:
6005: sub rndseed_64bit {
6006: my ($symb,$courseid,$domain,$username)=@_;
6007: {
6008: use integer;
6009: my $symbchck=unpack("%32S*",$symb) << 21;
6010: my $symbseed=numval($symb) << 10;
6011: my $namechck=unpack("%32S*",$username);
6012:
6013: my $nameseed=numval($username) << 21;
6014: my $domainseed=unpack("%32S*",$domain) << 10;
6015: my $courseseed=unpack("%32S*",$courseid);
6016:
6017: my $num1=$symbchck+$symbseed+$namechck;
6018: my $num2=$nameseed+$domainseed+$courseseed;
6019: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6020: #&Apache::lonxml::debug("rndseed :$num:$symb");
6021: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6022: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6023: return "$num1,$num2";
6024: }
6025: }
6026:
6027: sub rndseed_64bit2 {
6028: my ($symb,$courseid,$domain,$username)=@_;
6029: {
6030: use integer;
6031: # strings need to be an even # of cahracters long, it it is odd the
6032: # last characters gets thrown away
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: return "$num1,$num2";
6046: }
6047: }
6048:
6049: sub rndseed_64bit3 {
6050: my ($symb,$courseid,$domain,$username)=@_;
6051: {
6052: use integer;
6053: # strings need to be an even # of cahracters long, it it is odd the
6054: # last characters gets thrown away
6055: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6056: my $symbseed=numval2($symb) << 10;
6057: my $namechck=unpack("%32S*",$username.' ');
6058:
6059: my $nameseed=numval2($username) << 21;
6060: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6061: my $courseseed=unpack("%32S*",$courseid.' ');
6062:
6063: my $num1=$symbchck+$symbseed+$namechck;
6064: my $num2=$nameseed+$domainseed+$courseseed;
6065: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6066: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
6067: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6068:
6069: return "$num1:$num2";
6070: }
6071: }
6072:
6073: sub rndseed_64bit4 {
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=numval3($symb) << 10;
6081: my $namechck=unpack("%32S*",$username.' ');
6082:
6083: my $nameseed=numval3($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_64bit5 {
6098: my ($symb,$courseid,$domain,$username)=@_;
6099: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
6100: return "$num1:$num2";
6101: }
6102:
6103: sub rndseed_CODE_64bit {
6104: my ($symb,$courseid,$domain,$username)=@_;
6105: {
6106: use integer;
6107: my $symbchck=unpack("%32S*",$symb.' ') << 16;
6108: my $symbseed=numval2($symb);
6109: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
6110: my $CODEseed=numval(&getCODE());
6111: my $courseseed=unpack("%32S*",$courseid.' ');
6112: my $num1=$symbseed+$CODEchck;
6113: my $num2=$CODEseed+$courseseed+$symbchck;
6114: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
6115: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
6116: if ($_64bit) { $num1=(($num1<<32)>>32); }
6117: if ($_64bit) { $num2=(($num2<<32)>>32); }
6118: return "$num1:$num2";
6119: }
6120: }
6121:
6122: sub rndseed_CODE_64bit4 {
6123: my ($symb,$courseid,$domain,$username)=@_;
6124: {
6125: use integer;
6126: my $symbchck=unpack("%32S*",$symb.' ') << 16;
6127: my $symbseed=numval3($symb);
6128: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
6129: my $CODEseed=numval3(&getCODE());
6130: my $courseseed=unpack("%32S*",$courseid.' ');
6131: my $num1=$symbseed+$CODEchck;
6132: my $num2=$CODEseed+$courseseed+$symbchck;
6133: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
6134: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
6135: if ($_64bit) { $num1=(($num1<<32)>>32); }
6136: if ($_64bit) { $num2=(($num2<<32)>>32); }
6137: return "$num1:$num2";
6138: }
6139: }
6140:
6141: sub rndseed_CODE_64bit5 {
6142: my ($symb,$courseid,$domain,$username)=@_;
6143: my $code = &getCODE();
6144: my ($num1,$num2)=&digest("$symb,$courseid,$code");
6145: return "$num1:$num2";
6146: }
6147:
6148: sub setup_random_from_rndseed {
6149: my ($rndseed)=@_;
6150: if ($rndseed =~/([,:])/) {
6151: my ($num1,$num2)=split(/[,:]/,$rndseed);
6152: &Math::Random::random_set_seed(abs($num1),abs($num2));
6153: } else {
6154: &Math::Random::random_set_seed_from_phrase($rndseed);
6155: }
6156: }
6157:
6158: sub latest_receipt_algorithm_id {
6159: return 'receipt2';
6160: }
6161:
6162: sub recunique {
6163: my $fucourseid=shift;
6164: my $unique;
6165: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
6166: $unique=$env{"course.$fucourseid.internal.encseed"};
6167: } else {
6168: $unique=$perlvar{'lonReceipt'};
6169: }
6170: return unpack("%32C*",$unique);
6171: }
6172:
6173: sub recprefix {
6174: my $fucourseid=shift;
6175: my $prefix;
6176: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
6177: $prefix=$env{"course.$fucourseid.internal.encpref"};
6178: } else {
6179: $prefix=$perlvar{'lonHostID'};
6180: }
6181: return unpack("%32C*",$prefix);
6182: }
6183:
6184: sub ireceipt {
6185: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
6186: my $cuname=unpack("%32C*",$funame);
6187: my $cudom=unpack("%32C*",$fudom);
6188: my $cucourseid=unpack("%32C*",$fucourseid);
6189: my $cusymb=unpack("%32C*",$fusymb);
6190: my $cunique=&recunique($fucourseid);
6191: my $cpart=unpack("%32S*",$part);
6192: my $return =&recprefix($fucourseid).'-';
6193: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
6194: $env{'request.state'} eq 'construct') {
6195: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
6196: " and ".($cpart%$cudom));
6197:
6198: $return.= ($cunique%$cuname+
6199: $cunique%$cudom+
6200: $cusymb%$cuname+
6201: $cusymb%$cudom+
6202: $cucourseid%$cuname+
6203: $cucourseid%$cudom+
6204: $cpart%$cuname+
6205: $cpart%$cudom);
6206: } else {
6207: $return.= ($cunique%$cuname+
6208: $cunique%$cudom+
6209: $cusymb%$cuname+
6210: $cusymb%$cudom+
6211: $cucourseid%$cuname+
6212: $cucourseid%$cudom);
6213: }
6214: return $return;
6215: }
6216:
6217: sub receipt {
6218: my ($part)=@_;
6219: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
6220: return &ireceipt($name,$domain,$courseid,$symb,$part);
6221: }
6222:
6223: # ------------------------------------------------------------ Serves up a file
6224: # returns either the contents of the file or
6225: # -1 if the file doesn't exist
6226: #
6227: # if the target is a file that was uploaded via DOCS,
6228: # a check will be made to see if a current copy exists on the local server,
6229: # if it does this will be served, otherwise a copy will be retrieved from
6230: # the home server for the course and stored in /home/httpd/html/userfiles on
6231: # the local server.
6232:
6233: sub getfile {
6234: my ($file) = @_;
6235: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
6236: &repcopy($file);
6237: return &readfile($file);
6238: }
6239:
6240: sub repcopy_userfile {
6241: my ($file)=@_;
6242: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
6243: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
6244: my ($cdom,$cnum,$filename) =
6245: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
6246: my ($info,$rtncode);
6247: my $uri="/uploaded/$cdom/$cnum/$filename";
6248: if (-e "$file") {
6249: my @fileinfo = stat($file);
6250: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
6251: if ($lwpresp ne 'ok') {
6252: if ($rtncode eq '404') {
6253: unlink($file);
6254: }
6255: #my $ua=new LWP::UserAgent;
6256: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6257: #my $response=$ua->request($request);
6258: #if ($response->is_success()) {
6259: # return $response->content;
6260: # } else {
6261: # return -1;
6262: # }
6263: return -1;
6264: }
6265: if ($info < $fileinfo[9]) {
6266: return 'ok';
6267: }
6268: $info = '';
6269: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
6270: if ($lwpresp ne 'ok') {
6271: return -1;
6272: }
6273: } else {
6274: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
6275: if ($lwpresp ne 'ok') {
6276: my $ua=new LWP::UserAgent;
6277: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6278: my $response=$ua->request($request);
6279: if ($response->is_success()) {
6280: $info=$response->content;
6281: } else {
6282: return -1;
6283: }
6284: }
6285: my @parts = ($cdom,$cnum);
6286: if ($filename =~ m|^(.+)/[^/]+$|) {
6287: push @parts, split(/\//,$1);
6288: }
6289: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
6290: foreach my $part (@parts) {
6291: $path .= '/'.$part;
6292: if (!-e $path) {
6293: mkdir($path,0770);
6294: }
6295: }
6296: }
6297: open(FILE,">$file");
6298: print FILE $info;
6299: close(FILE);
6300: return 'ok';
6301: }
6302:
6303: sub tokenwrapper {
6304: my $uri=shift;
6305: $uri=~s|^http\://([^/]+)||;
6306: $uri=~s|^/||;
6307: $env{'user.environment'}=~/\/([^\/]+)\.id/;
6308: my $token=$1;
6309: my (undef,$udom,$uname,$file)=split('/',$uri,4);
6310: if ($udom && $uname && $file) {
6311: $file=~s|(\?\.*)*$||;
6312: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
6313: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
6314: (($uri=~/\?/)?'&':'?').'token='.$token.
6315: '&tokenissued='.$perlvar{'lonHostID'};
6316: } else {
6317: return '/adm/notfound.html';
6318: }
6319: }
6320:
6321: sub getuploaded {
6322: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
6323: $uri=~s/^\///;
6324: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
6325: my $ua=new LWP::UserAgent;
6326: my $request=new HTTP::Request($reqtype,$uri);
6327: my $response=$ua->request($request);
6328: $$rtncode = $response->code;
6329: if (! $response->is_success()) {
6330: return 'failed';
6331: }
6332: if ($reqtype eq 'HEAD') {
6333: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
6334: } elsif ($reqtype eq 'GET') {
6335: $$info = $response->content;
6336: }
6337: return 'ok';
6338: }
6339:
6340: sub readfile {
6341: my $file = shift;
6342: if ( (! -e $file ) || ($file eq '') ) { return -1; };
6343: my $fh;
6344: open($fh,"<$file");
6345: my $a='';
6346: while (<$fh>) { $a .=$_; }
6347: return $a;
6348: }
6349:
6350: sub filelocation {
6351: my ($dir,$file) = @_;
6352: my $location;
6353: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
6354:
6355: if ($file =~ m-^/adm/-) {
6356: $file=~s-^/adm/wrapper/-/-;
6357: $file=~s-^/adm/coursedocs/showdoc/-/-;
6358: }
6359: if ($file=~m:^/~:) { # is a contruction space reference
6360: $location = $file;
6361: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
6362: } elsif ($file=~m:^/home/[^/]*/public_html/:) {
6363: # is a correct contruction space reference
6364: $location = $file;
6365: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
6366: my ($udom,$uname,$filename)=
6367: ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
6368: my $home=&homeserver($uname,$udom);
6369: my $is_me=0;
6370: my @ids=¤t_machine_ids();
6371: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
6372: if ($is_me) {
6373: $location=&Apache::loncommon::propath($udom,$uname).
6374: '/userfiles/'.$filename;
6375: } else {
6376: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
6377: $udom.'/'.$uname.'/'.$filename;
6378: }
6379: } else {
6380: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
6381: $file=~s:^/res/:/:;
6382: if ( !( $file =~ m:^/:) ) {
6383: $location = $dir. '/'.$file;
6384: } else {
6385: $location = '/home/httpd/html/res'.$file;
6386: }
6387: }
6388: $location=~s://+:/:g; # remove duplicate /
6389: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
6390: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
6391: return $location;
6392: }
6393:
6394: sub hreflocation {
6395: my ($dir,$file)=@_;
6396: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
6397: $file=filelocation($dir,$file);
6398: } elsif ($file=~m-^/adm/-) {
6399: $file=~s-^/adm/wrapper/-/-;
6400: $file=~s-^/adm/coursedocs/showdoc/-/-;
6401: }
6402: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
6403: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
6404: } elsif ($file=~m-/home/(\w+)/public_html/-) {
6405: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
6406: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
6407: $file=~s-^/home/httpd/lonUsers/([^/]*)/./././([^/]*)/userfiles/
6408: -/uploaded/$1/$2/-x;
6409: }
6410: return $file;
6411: }
6412:
6413: sub current_machine_domains {
6414: my $hostname=$hostname{$perlvar{'lonHostID'}};
6415: my @domains;
6416: while( my($id, $name) = each(%hostname)) {
6417: # &logthis("-$id-$name-$hostname-");
6418: if ($hostname eq $name) {
6419: push(@domains,$hostdom{$id});
6420: }
6421: }
6422: return @domains;
6423: }
6424:
6425: sub current_machine_ids {
6426: my $hostname=$hostname{$perlvar{'lonHostID'}};
6427: my @ids;
6428: while( my($id, $name) = each(%hostname)) {
6429: # &logthis("-$id-$name-$hostname-");
6430: if ($hostname eq $name) {
6431: push(@ids,$id);
6432: }
6433: }
6434: return @ids;
6435: }
6436:
6437: # ------------------------------------------------------------- Declutters URLs
6438:
6439: sub declutter {
6440: my $thisfn=shift;
6441: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
6442: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
6443: $thisfn=~s/^\///;
6444: $thisfn=~s|^adm/wrapper/||;
6445: $thisfn=~s|^adm/coursedocs/showdoc/||;
6446: $thisfn=~s/^res\///;
6447: $thisfn=~s/\?.+$//;
6448: return $thisfn;
6449: }
6450:
6451: # ------------------------------------------------------------- Clutter up URLs
6452:
6453: sub clutter {
6454: my $thisfn='/'.&declutter(shift);
6455: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
6456: $thisfn='/res'.$thisfn;
6457: }
6458: if ($thisfn !~m|/adm|) {
6459: if ($thisfn =~ m|/ext/|) {
6460: $thisfn='/adm/wrapper'.$thisfn;
6461: } else {
6462: my ($ext) = ($thisfn =~ /\.(\w+)$/);
6463: my $embstyle=&Apache::loncommon::fileembstyle($ext);
6464: if ($embstyle eq 'ssi'
6465: || ($embstyle eq 'hdn')
6466: || ($embstyle eq 'rat')
6467: || ($embstyle eq 'prv')
6468: || ($embstyle eq 'ign')) {
6469: #do nothing with these
6470: } elsif (($embstyle eq 'img')
6471: || ($embstyle eq 'emb')
6472: || ($embstyle eq 'wrp')) {
6473: $thisfn='/adm/wrapper'.$thisfn;
6474: } elsif ($embstyle eq 'unk'
6475: && $thisfn!~/\.(sequence|page)$/) {
6476: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
6477: } else {
6478: # &logthis("Got a blank emb style");
6479: }
6480: }
6481: }
6482: return $thisfn;
6483: }
6484:
6485: sub freeze_escape {
6486: my ($value)=@_;
6487: if (ref($value)) {
6488: $value=&nfreeze($value);
6489: return '__FROZEN__'.&escape($value);
6490: }
6491: return &escape($value);
6492: }
6493:
6494: # -------------------------------------------------------- Escape Special Chars
6495:
6496: sub escape {
6497: my $str=shift;
6498: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
6499: return $str;
6500: }
6501:
6502: # ----------------------------------------------------- Un-Escape Special Chars
6503:
6504: sub unescape {
6505: my $str=shift;
6506: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
6507: return $str;
6508: }
6509:
6510: sub thaw_unescape {
6511: my ($value)=@_;
6512: if ($value =~ /^__FROZEN__/) {
6513: substr($value,0,10,undef);
6514: $value=&unescape($value);
6515: return &thaw($value);
6516: }
6517: return &unescape($value);
6518: }
6519:
6520: sub correct_line_ends {
6521: my ($result)=@_;
6522: $$result =~s/\r\n/\n/mg;
6523: $$result =~s/\r/\n/mg;
6524: }
6525: # ================================================================ Main Program
6526:
6527: sub goodbye {
6528: &logthis("Starting Shut down");
6529: #not converted to using infrastruture and probably shouldn't be
6530: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
6531: #converted
6532: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
6533: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
6534: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
6535: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
6536: #1.1 only
6537: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
6538: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
6539: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
6540: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
6541: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
6542: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
6543: &logthis(sprintf("%-20s is %s",'hits',$hits));
6544: &flushcourselogs();
6545: &logthis("Shutting down");
6546: }
6547:
6548: BEGIN {
6549: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
6550: unless ($readit) {
6551: {
6552: # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
6553: open(my $config,"</etc/httpd/conf/loncapa.conf");
6554:
6555: while (my $configline=<$config>) {
6556: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
6557: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
6558: chomp($varvalue);
6559: $perlvar{$varname}=$varvalue;
6560: }
6561: }
6562: close($config);
6563: }
6564: {
6565: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
6566:
6567: while (my $configline=<$config>) {
6568: if ($configline =~ /^[^\#]*PerlSetVar/) {
6569: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
6570: chomp($varvalue);
6571: $perlvar{$varname}=$varvalue;
6572: }
6573: }
6574: close($config);
6575: }
6576:
6577: # ------------------------------------------------------------ Read domain file
6578: {
6579: %domaindescription = ();
6580: %domain_auth_def = ();
6581: %domain_auth_arg_def = ();
6582: my $fh;
6583: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
6584: while (<$fh>) {
6585: next if (/^(\#|\s*$)/);
6586: # next if /^\#/;
6587: chomp;
6588: my ($domain, $domain_description, $def_auth, $def_auth_arg,
6589: $def_lang, $city, $longi, $lati, $primary) = split(/:/,$_);
6590: $domain_auth_def{$domain}=$def_auth;
6591: $domain_auth_arg_def{$domain}=$def_auth_arg;
6592: $domaindescription{$domain}=$domain_description;
6593: $domain_lang_def{$domain}=$def_lang;
6594: $domain_city{$domain}=$city;
6595: $domain_longi{$domain}=$longi;
6596: $domain_lati{$domain}=$lati;
6597: $domain_primary{$domain}=$primary;
6598:
6599: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
6600: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
6601: }
6602: }
6603: close ($fh);
6604: }
6605:
6606:
6607: # ------------------------------------------------------------- Read hosts file
6608: {
6609: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
6610:
6611: while (my $configline=<$config>) {
6612: next if ($configline =~ /^(\#|\s*$)/);
6613: chomp($configline);
6614: my ($id,$domain,$role,$name)=split(/:/,$configline);
6615: $name=~s/\s//g;
6616: if ($id && $domain && $role && $name) {
6617: $hostname{$id}=$name;
6618: $hostdom{$id}=$domain;
6619: if ($role eq 'library') { $libserv{$id}=$name; }
6620: }
6621: }
6622: close($config);
6623: # FIXME: dev server don't want this, production servers _do_ want this
6624: #&get_iphost();
6625: }
6626:
6627: sub get_iphost {
6628: if (%iphost) { return %iphost; }
6629: my %name_to_ip;
6630: foreach my $id (keys(%hostname)) {
6631: my $name=$hostname{$id};
6632: my $ip;
6633: if (!exists($name_to_ip{$name})) {
6634: $ip = gethostbyname($name);
6635: if (!$ip || length($ip) ne 4) {
6636: &logthis("Skipping host $id name $name no IP found\n");
6637: next;
6638: }
6639: $ip=inet_ntoa($ip);
6640: $name_to_ip{$name} = $ip;
6641: } else {
6642: $ip = $name_to_ip{$name};
6643: }
6644: push(@{$iphost{$ip}},$id);
6645: }
6646: return %iphost;
6647: }
6648:
6649: # ------------------------------------------------------ Read spare server file
6650: {
6651: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
6652:
6653: while (my $configline=<$config>) {
6654: chomp($configline);
6655: if ($configline) {
6656: $spareid{$configline}=1;
6657: }
6658: }
6659: close($config);
6660: }
6661: # ------------------------------------------------------------ Read permissions
6662: {
6663: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
6664:
6665: while (my $configline=<$config>) {
6666: chomp($configline);
6667: if ($configline) {
6668: my ($role,$perm)=split(/ /,$configline);
6669: if ($perm ne '') { $pr{$role}=$perm; }
6670: }
6671: }
6672: close($config);
6673: }
6674:
6675: # -------------------------------------------- Read plain texts for permissions
6676: {
6677: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
6678:
6679: while (my $configline=<$config>) {
6680: chomp($configline);
6681: if ($configline) {
6682: my ($short,$plain)=split(/:/,$configline);
6683: if ($plain ne '') { $prp{$short}=$plain; }
6684: }
6685: }
6686: close($config);
6687: }
6688:
6689: # ---------------------------------------------------------- Read package table
6690: {
6691: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
6692:
6693: while (my $configline=<$config>) {
6694: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
6695: chomp($configline);
6696: my ($short,$plain)=split(/:/,$configline);
6697: my ($pack,$name)=split(/\&/,$short);
6698: if ($plain ne '') {
6699: $packagetab{$pack.'&'.$name.'&name'}=$name;
6700: $packagetab{$short}=$plain;
6701: }
6702: }
6703: close($config);
6704: }
6705:
6706: # ------------- set up temporary directory
6707: {
6708: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
6709:
6710: }
6711:
6712: $memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
6713:
6714: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
6715: $dumpcount=0;
6716:
6717: &logtouch();
6718: &logthis('<font color="yellow">INFO: Read configuration</font>');
6719: $readit=1;
6720: {
6721: use integer;
6722: my $test=(2**32)+1;
6723: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
6724: &logthis(" Detected 64bit platform ($_64bit)");
6725: }
6726: }
6727: }
6728:
6729: 1;
6730: __END__
6731:
6732: =pod
6733:
6734: =head1 NAME
6735:
6736: Apache::lonnet - Subroutines to ask questions about things in the network.
6737:
6738: =head1 SYNOPSIS
6739:
6740: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
6741:
6742: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
6743:
6744: Common parameters:
6745:
6746: =over 4
6747:
6748: =item *
6749:
6750: $uname : an internal username (if $cname expecting a course Id specifically)
6751:
6752: =item *
6753:
6754: $udom : a domain (if $cdom expecting a course's domain specifically)
6755:
6756: =item *
6757:
6758: $symb : a resource instance identifier
6759:
6760: =item *
6761:
6762: $namespace : the name of a .db file that contains the data needed or
6763: being set.
6764:
6765: =back
6766:
6767: =head1 OVERVIEW
6768:
6769: lonnet provides subroutines which interact with the
6770: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
6771: about classes, users, and resources.
6772:
6773: For many of these objects you can also use this to store data about
6774: them or modify them in various ways.
6775:
6776: =head2 Symbs
6777:
6778: To identify a specific instance of a resource, LON-CAPA uses symbols
6779: or "symbs"X<symb>. These identifiers are built from the URL of the
6780: map, the resource number of the resource in the map, and the URL of
6781: the resource itself. The latter is somewhat redundant, but might help
6782: if maps change.
6783:
6784: An example is
6785:
6786: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
6787:
6788: The respective map entry is
6789:
6790: <resource id="19" src="/res/msu/korte/tests/part12.problem"
6791: title="Problem 2">
6792: </resource>
6793:
6794: Symbs are used by the random number generator, as well as to store and
6795: restore data specific to a certain instance of for example a problem.
6796:
6797: =head2 Storing And Retrieving Data
6798:
6799: X<store()>X<cstore()>X<restore()>Three of the most important functions
6800: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
6801: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
6802: is is the non-critical message twin of cstore. These functions are for
6803: handlers to store a perl hash to a user's permanent data space in an
6804: easy manner, and to retrieve it again on another call. It is expected
6805: that a handler would use this once at the beginning to retrieve data,
6806: and then again once at the end to send only the new data back.
6807:
6808: The data is stored in the user's data directory on the user's
6809: homeserver under the ID of the course.
6810:
6811: The hash that is returned by restore will have all of the previous
6812: value for all of the elements of the hash.
6813:
6814: Example:
6815:
6816: #creating a hash
6817: my %hash;
6818: $hash{'foo'}='bar';
6819:
6820: #storing it
6821: &Apache::lonnet::cstore(\%hash);
6822:
6823: #changing a value
6824: $hash{'foo'}='notbar';
6825:
6826: #adding a new value
6827: $hash{'bar'}='foo';
6828: &Apache::lonnet::cstore(\%hash);
6829:
6830: #retrieving the hash
6831: my %history=&Apache::lonnet::restore();
6832:
6833: #print the hash
6834: foreach my $key (sort(keys(%history))) {
6835: print("\%history{$key} = $history{$key}");
6836: }
6837:
6838: Will print out:
6839:
6840: %history{1:foo} = bar
6841: %history{1:keys} = foo:timestamp
6842: %history{1:timestamp} = 990455579
6843: %history{2:bar} = foo
6844: %history{2:foo} = notbar
6845: %history{2:keys} = foo:bar:timestamp
6846: %history{2:timestamp} = 990455580
6847: %history{bar} = foo
6848: %history{foo} = notbar
6849: %history{timestamp} = 990455580
6850: %history{version} = 2
6851:
6852: Note that the special hash entries C<keys>, C<version> and
6853: C<timestamp> were added to the hash. C<version> will be equal to the
6854: total number of versions of the data that have been stored. The
6855: C<timestamp> attribute will be the UNIX time the hash was
6856: stored. C<keys> is available in every historical section to list which
6857: keys were added or changed at a specific historical revision of a
6858: hash.
6859:
6860: B<Warning>: do not store the hash that restore returns directly. This
6861: will cause a mess since it will restore the historical keys as if the
6862: were new keys. I.E. 1:foo will become 1:1:foo etc.
6863:
6864: Calling convention:
6865:
6866: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
6867: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
6868:
6869: For more detailed information, see lonnet specific documentation.
6870:
6871: =head1 RETURN MESSAGES
6872:
6873: =over 4
6874:
6875: =item * B<con_lost>: unable to contact remote host
6876:
6877: =item * B<con_delayed>: unable to contact remote host, message will be delivered
6878: when the connection is brought back up
6879:
6880: =item * B<con_failed>: unable to contact remote host and unable to save message
6881: for later delivery
6882:
6883: =item * B<error:>: an error a occured, a description of the error follows the :
6884:
6885: =item * B<no_such_host>: unable to fund a host associated with the user/domain
6886: that was requested
6887:
6888: =back
6889:
6890: =head1 PUBLIC SUBROUTINES
6891:
6892: =head2 Session Environment Functions
6893:
6894: =over 4
6895:
6896: =item *
6897: X<appenv()>
6898: B<appenv(%hash)>: the value of %hash is written to
6899: the user envirnoment file, and will be restored for each access this
6900: user makes during this session, also modifies the %env for the current
6901: process
6902:
6903: =item *
6904: X<delenv()>
6905: B<delenv($regexp)>: removes all items from the session
6906: environment file that matches the regular expression in $regexp. The
6907: values are also delted from the current processes %env.
6908:
6909: =back
6910:
6911: =head2 User Information
6912:
6913: =over 4
6914:
6915: =item *
6916: X<queryauthenticate()>
6917: B<queryauthenticate($uname,$udom)>: try to determine user's current
6918: authentication scheme
6919:
6920: =item *
6921: X<authenticate()>
6922: B<authenticate($uname,$upass,$udom)>: try to
6923: authenticate user from domain's lib servers (first use the current
6924: one). C<$upass> should be the users password.
6925:
6926: =item *
6927: X<homeserver()>
6928: B<homeserver($uname,$udom)>: find the server which has
6929: the user's directory and files (there must be only one), this caches
6930: the answer, and also caches if there is a borken connection.
6931:
6932: =item *
6933: X<idget()>
6934: B<idget($udom,@ids)>: find the usernames behind a list of IDs
6935: (IDs are a unique resource in a domain, there must be only 1 ID per
6936: username, and only 1 username per ID in a specific domain) (returns
6937: hash: id=>name,id=>name)
6938:
6939: =item *
6940: X<idrget()>
6941: B<idrget($udom,@unames)>: find the IDs behind a list of
6942: usernames (returns hash: name=>id,name=>id)
6943:
6944: =item *
6945: X<idput()>
6946: B<idput($udom,%ids)>: store away a list of names and associated IDs
6947:
6948: =item *
6949: X<rolesinit()>
6950: B<rolesinit($udom,$username,$authhost)>: get user privileges
6951:
6952: =item *
6953: X<getsection()>
6954: B<getsection($udom,$uname,$cname)>: finds the section of student in the
6955: course $cname, return section name/number or '' for "not in course"
6956: and '-1' for "no section"
6957:
6958: =item *
6959: X<userenvironment()>
6960: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
6961: passed in @what from the requested user's environment, returns a hash
6962:
6963: =back
6964:
6965: =head2 User Roles
6966:
6967: =over 4
6968:
6969: =item *
6970:
6971: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
6972: actions
6973: F: full access
6974: U,I,K: authentication modes (cxx only)
6975: '': forbidden
6976: 1: user needs to choose course
6977: 2: browse allowed
6978:
6979: =item *
6980:
6981: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
6982: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
6983: and course level
6984:
6985: =item *
6986:
6987: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
6988: explanation of a user role term
6989:
6990: =back
6991:
6992: =head2 User Modification
6993:
6994: =over 4
6995:
6996: =item *
6997:
6998: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
6999: user for the level given by URL. Optional start and end dates (leave empty
7000: string or zero for "no date")
7001:
7002: =item *
7003:
7004: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
7005: change a users, password, possible return values are: ok,
7006: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
7007: refused
7008:
7009: =item *
7010:
7011: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
7012:
7013: =item *
7014:
7015: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
7016: modify user
7017:
7018: =item *
7019:
7020: modifystudent
7021:
7022: modify a students enrollment and identification information.
7023: The course id is resolved based on the current users environment.
7024: This means the envoking user must be a course coordinator or otherwise
7025: associated with a course.
7026:
7027: This call is essentially a wrapper for lonnet::modifyuser and
7028: lonnet::modify_student_enrollment
7029:
7030: Inputs:
7031:
7032: =over 4
7033:
7034: =item B<$udom> Students loncapa domain
7035:
7036: =item B<$uname> Students loncapa login name
7037:
7038: =item B<$uid> Students id/student number
7039:
7040: =item B<$umode> Students authentication mode
7041:
7042: =item B<$upass> Students password
7043:
7044: =item B<$first> Students first name
7045:
7046: =item B<$middle> Students middle name
7047:
7048: =item B<$last> Students last name
7049:
7050: =item B<$gene> Students generation
7051:
7052: =item B<$usec> Students section in course
7053:
7054: =item B<$end> Unix time of the roles expiration
7055:
7056: =item B<$start> Unix time of the roles start date
7057:
7058: =item B<$forceid> If defined, allow $uid to be changed
7059:
7060: =item B<$desiredhome> server to use as home server for student
7061:
7062: =back
7063:
7064: =item *
7065:
7066: modify_student_enrollment
7067:
7068: Change a students enrollment status in a class. The environment variable
7069: 'role.request.course' must be defined for this function to proceed.
7070:
7071: Inputs:
7072:
7073: =over 4
7074:
7075: =item $udom, students domain
7076:
7077: =item $uname, students name
7078:
7079: =item $uid, students user id
7080:
7081: =item $first, students first name
7082:
7083: =item $middle
7084:
7085: =item $last
7086:
7087: =item $gene
7088:
7089: =item $usec
7090:
7091: =item $end
7092:
7093: =item $start
7094:
7095: =back
7096:
7097:
7098: =item *
7099:
7100: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
7101: custom role; give a custom role to a user for the level given by URL. Specify
7102: name and domain of role author, and role name
7103:
7104: =item *
7105:
7106: revokerole($udom,$uname,$url,$role) : revoke a role for url
7107:
7108: =item *
7109:
7110: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
7111:
7112: =back
7113:
7114: =head2 Course Infomation
7115:
7116: =over 4
7117:
7118: =item *
7119:
7120: coursedescription($courseid) : returns a hash of information about the
7121: specified course id, including all environment settings for the
7122: course, the description of the course will be in the hash under the
7123: key 'description'
7124:
7125: =item *
7126:
7127: resdata($name,$domain,$type,@which) : request for current parameter
7128: setting for a specific $type, where $type is either 'course' or 'user',
7129: @what should be a list of parameters to ask about. This routine caches
7130: answers for 5 minutes.
7131:
7132: =back
7133:
7134: =head2 Course Modification
7135:
7136: =over 4
7137:
7138: =item *
7139:
7140: writecoursepref($courseid,%prefs) : write preferences (environment
7141: database) for a course
7142:
7143: =item *
7144:
7145: createcourse($udom,$description,$url) : make/modify course
7146:
7147: =back
7148:
7149: =head2 Resource Subroutines
7150:
7151: =over 4
7152:
7153: =item *
7154:
7155: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
7156:
7157: =item *
7158:
7159: repcopy($filename) : subscribes to the requested file, and attempts to
7160: replicate from the owning library server, Might return
7161: 'unavailable', 'not_found', 'forbidden', 'ok', or
7162: 'bad_request', also attempts to grab the metadata for the
7163: resource. Expects the local filesystem pathname
7164: (/home/httpd/html/res/....)
7165:
7166: =back
7167:
7168: =head2 Resource Information
7169:
7170: =over 4
7171:
7172: =item *
7173:
7174: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
7175: a vairety of different possible values, $varname should be a request
7176: string, and the other parameters can be used to specify who and what
7177: one is asking about.
7178:
7179: Possible values for $varname are environment.lastname (or other item
7180: from the envirnment hash), user.name (or someother aspect about the
7181: user), resource.0.maxtries (or some other part and parameter of a
7182: resource)
7183:
7184: =item *
7185:
7186: directcondval($number) : get current value of a condition; reads from a state
7187: string
7188:
7189: =item *
7190:
7191: condval($condidx) : value of condition index based on state
7192:
7193: =item *
7194:
7195: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
7196: resource's metadata, $what should be either a specific key, or either
7197: 'keys' (to get a list of possible keys) or 'packages' to get a list of
7198: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
7199:
7200: this function automatically caches all requests
7201:
7202: =item *
7203:
7204: metadata_query($query,$custom,$customshow) : make a metadata query against the
7205: network of library servers; returns file handle of where SQL and regex results
7206: will be stored for query
7207:
7208: =item *
7209:
7210: symbread($filename) : return symbolic list entry (filename argument optional);
7211: returns the data handle
7212:
7213: =item *
7214:
7215: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
7216: a possible symb for the URL in $thisfn, and if is an encryypted
7217: resource that the user accessed using /enc/ returns a 1 on success, 0
7218: on failure, user must be in a course, as it assumes the existance of
7219: the course initial hash, and uses $env('request.course.id'}
7220:
7221:
7222: =item *
7223:
7224: symbclean($symb) : removes versions numbers from a symb, returns the
7225: cleaned symb
7226:
7227: =item *
7228:
7229: is_on_map($uri) : checks if the $uri is somewhere on the current
7230: course map, user must be in a course for it to work.
7231:
7232: =item *
7233:
7234: numval($salt) : return random seed value (addend for rndseed)
7235:
7236: =item *
7237:
7238: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
7239: a random seed, all arguments are optional, if they aren't sent it uses the
7240: environment to derive them. Note: if symb isn't sent and it can't get one
7241: from &symbread it will use the current time as its return value
7242:
7243: =item *
7244:
7245: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
7246: unfakeable, receipt
7247:
7248: =item *
7249:
7250: receipt() : API to ireceipt working off of env values; given out to users
7251:
7252: =item *
7253:
7254: countacc($url) : count the number of accesses to a given URL
7255:
7256: =item *
7257:
7258: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
7259:
7260: =item *
7261:
7262: checkin($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 $tcrsid)
7263:
7264: =item *
7265:
7266: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
7267:
7268: =item *
7269:
7270: devalidate($symb) : devalidate temporary spreadsheet calculations,
7271: forcing spreadsheet to reevaluate the resource scores next time.
7272:
7273: =back
7274:
7275: =head2 Storing/Retreiving Data
7276:
7277: =over 4
7278:
7279: =item *
7280:
7281: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
7282: for this url; hashref needs to be given and should be a \%hashname; the
7283: remaining args aren't required and if they aren't passed or are '' they will
7284: be derived from the env
7285:
7286: =item *
7287:
7288: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
7289: uses critical subroutine
7290:
7291: =item *
7292:
7293: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
7294: all args are optional
7295:
7296: =item *
7297:
7298: dumpstore($namespace,$udom,$uname,$regexp,$range) :
7299: dumps the complete (or key matching regexp) namespace into a hash
7300: ($udom, $uname, $regexp, $range are optional) for a namespace that is
7301: normally &store()ed into
7302:
7303: $range should be either an integer '100' (give me the first 100
7304: matching records)
7305: or be two integers sperated by a - with no spaces
7306: '30-50' (give me the 30th through the 50th matching
7307: records)
7308:
7309:
7310: =item *
7311:
7312: putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
7313: replaces a &store() version of data with a replacement set of data
7314: for a particular resource in a namespace passed in the $storehash hash
7315: reference
7316:
7317: =item *
7318:
7319: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
7320: works very similar to store/cstore, but all data is stored in a
7321: temporary location and can be reset using tmpreset, $storehash should
7322: be a hash reference, returns nothing on success
7323:
7324: =item *
7325:
7326: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
7327: similar to restore, but all data is stored in a temporary location and
7328: can be reset using tmpreset. Returns a hash of values on success,
7329: error string otherwise.
7330:
7331: =item *
7332:
7333: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
7334: deltes all keys for $symb form the temporary storage hash.
7335:
7336: =item *
7337:
7338: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7339: reference filled in from namesp ($udom and $uname are optional)
7340:
7341: =item *
7342:
7343: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
7344: namesp ($udom and $uname are optional)
7345:
7346: =item *
7347:
7348: dump($namespace,$udom,$uname,$regexp,$range) :
7349: dumps the complete (or key matching regexp) namespace into a hash
7350: ($udom, $uname, $regexp, $range are optional)
7351:
7352: $range should be either an integer '100' (give me the first 100
7353: matching records)
7354: or be two integers sperated by a - with no spaces
7355: '30-50' (give me the 30th through the 50th matching
7356: records)
7357: =item *
7358:
7359: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
7360: $store can be a scalar, an array reference, or if the amount to be
7361: incremented is > 1, a hash reference.
7362:
7363: ($udom and $uname are optional)
7364:
7365: =item *
7366:
7367: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
7368: ($udom and $uname are optional)
7369:
7370: =item *
7371:
7372: cput($namespace,$storehash,$udom,$uname) : critical put
7373: ($udom and $uname are optional)
7374:
7375: =item *
7376:
7377: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7378: reference filled in from namesp (encrypts the return communication)
7379: ($udom and $uname are optional)
7380:
7381: =item *
7382:
7383: log($udom,$name,$home,$message) : write to permanent log for user; use
7384: critical subroutine
7385:
7386: =back
7387:
7388: =head2 Network Status Functions
7389:
7390: =over 4
7391:
7392: =item *
7393:
7394: dirlist($uri) : return directory list based on URI
7395:
7396: =item *
7397:
7398: spareserver() : find server with least workload from spare.tab
7399:
7400: =back
7401:
7402: =head2 Apache Request
7403:
7404: =over 4
7405:
7406: =item *
7407:
7408: ssi($url,%hash) : server side include, does a complete request cycle on url to
7409: localhost, posts hash
7410:
7411: =back
7412:
7413: =head2 Data to String to Data
7414:
7415: =over 4
7416:
7417: =item *
7418:
7419: hash2str(%hash) : convert a hash into a string complete with escaping and '='
7420: and '&' separators, supports elements that are arrayrefs and hashrefs
7421:
7422: =item *
7423:
7424: hashref2str($hashref) : convert a hashref into a string complete with
7425: escaping and '=' and '&' separators, supports elements that are
7426: arrayrefs and hashrefs
7427:
7428: =item *
7429:
7430: arrayref2str($arrayref) : convert an arrayref into a string complete
7431: with escaping and '&' separators, supports elements that are arrayrefs
7432: and hashrefs
7433:
7434: =item *
7435:
7436: str2hash($string) : convert string to hash using unescaping and
7437: splitting on '=' and '&', supports elements that are arrayrefs and
7438: hashrefs
7439:
7440: =item *
7441:
7442: str2array($string) : convert string to hash using unescaping and
7443: splitting on '&', supports elements that are arrayrefs and hashrefs
7444:
7445: =back
7446:
7447: =head2 Logging Routines
7448:
7449: =over 4
7450:
7451: These routines allow one to make log messages in the lonnet.log and
7452: lonnet.perm logfiles.
7453:
7454: =item *
7455:
7456: logtouch() : make sure the logfile, lonnet.log, exists
7457:
7458: =item *
7459:
7460: logthis() : append message to the normal lonnet.log file, it gets
7461: preiodically rolled over and deleted.
7462:
7463: =item *
7464:
7465: logperm() : append a permanent message to lonnet.perm.log, this log
7466: file never gets deleted by any automated portion of the system, only
7467: messages of critical importance should go in here.
7468:
7469: =back
7470:
7471: =head2 General File Helper Routines
7472:
7473: =over 4
7474:
7475: =item *
7476:
7477: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
7478: (a) files in /uploaded
7479: (i) If a local copy of the file exists -
7480: compares modification date of local copy with last-modified date for
7481: definitive version stored on home server for course. If local copy is
7482: stale, requests a new version from the home server and stores it.
7483: If the original has been removed from the home server, then local copy
7484: is unlinked.
7485: (ii) If local copy does not exist -
7486: requests the file from the home server and stores it.
7487:
7488: If $caller is 'uploadrep':
7489: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
7490: for request for files originally uploaded via DOCS.
7491: - returns 'ok' if fresh local copy now available, -1 otherwise.
7492:
7493: Otherwise:
7494: This indicates a call from the content generation phase of the request.
7495: - returns the entire contents of the file or -1.
7496:
7497: (b) files in /res
7498: - returns the entire contents of a file or -1;
7499: it properly subscribes to and replicates the file if neccessary.
7500:
7501:
7502: =item *
7503:
7504: stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
7505: reference
7506:
7507: returns either a stat() list of data about the file or an empty list
7508: if the file doesn't exist or couldn't find out about it (connection
7509: problems or user unknown)
7510:
7511: =item *
7512:
7513: filelocation($dir,$file) : returns file system location of a file
7514: based on URI; meant to be "fairly clean" absolute reference, $dir is a
7515: directory that relative $file lookups are to looked in ($dir of /a/dir
7516: and a file of ../bob will become /a/bob)
7517:
7518: =item *
7519:
7520: hreflocation($dir,$file) : returns file system location or a URL; same as
7521: filelocation except for hrefs
7522:
7523: =item *
7524:
7525: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
7526:
7527: =back
7528:
7529: =head2 Usererfile file routines (/uploaded*)
7530:
7531: =over 4
7532:
7533: =item *
7534:
7535: userfileupload(): main rotine for putting a file in a user or course's
7536: filespace, arguments are,
7537:
7538: formname - required - this is the name of the element in $env where the
7539: filename, and the contents of the file to create/modifed exist
7540: the filename is in $env{'form.'.$formname.'.filename'} and the
7541: contents of the file is located in $env{'form.'.$formname}
7542: coursedoc - if true, store the file in the course of the active role
7543: of the current user
7544: subdir - required - subdirectory to put the file in under ../userfiles/
7545: if undefined, it will be placed in "unknown"
7546:
7547: (This routine calls clean_filename() to remove any dangerous
7548: characters from the filename, and then calls finuserfileupload() to
7549: complete the transaction)
7550:
7551: returns either the url of the uploaded file (/uploaded/....) if successful
7552: and /adm/notfound.html if unsuccessful
7553:
7554: =item *
7555:
7556: clean_filename(): routine for cleaing a filename up for storage in
7557: userfile space, argument is:
7558:
7559: filename - proposed filename
7560:
7561: returns: the new clean filename
7562:
7563: =item *
7564:
7565: finishuserfileupload(): routine that creaes and sends the file to
7566: userspace, probably shouldn't be called directly
7567:
7568: docuname: username or courseid of destination for the file
7569: docudom: domain of user/course of destination for the file
7570: formname: same as for userfileupload()
7571: fname: filename (inculding subdirectories) for the file
7572:
7573: returns either the url of the uploaded file (/uploaded/....) if successful
7574: and /adm/notfound.html if unsuccessful
7575:
7576: =item *
7577:
7578: renameuserfile(): renames an existing userfile to a new name
7579:
7580: Args:
7581: docuname: username or courseid of destination for the file
7582: docudom: domain of user/course of destination for the file
7583: old: current file name (including any subdirs under userfiles)
7584: new: desired file name (including any subdirs under userfiles)
7585:
7586: =item *
7587:
7588: mkdiruserfile(): creates a directory is a userfiles dir
7589:
7590: Args:
7591: docuname: username or courseid of destination for the file
7592: docudom: domain of user/course of destination for the file
7593: dir: dir to create (including any subdirs under userfiles)
7594:
7595: =item *
7596:
7597: removeuserfile(): removes a file that exists in userfiles
7598:
7599: Args:
7600: docuname: username or courseid of destination for the file
7601: docudom: domain of user/course of destination for the file
7602: fname: filname to delete (including any subdirs under userfiles)
7603:
7604: =item *
7605:
7606: removeuploadedurl(): convience function for removeuserfile()
7607:
7608: Args:
7609: url: a full /uploaded/... url to delete
7610:
7611: =back
7612:
7613: =head2 HTTP Helper Routines
7614:
7615: =over 4
7616:
7617: =item *
7618:
7619: escape() : unpack non-word characters into CGI-compatible hex codes
7620:
7621: =item *
7622:
7623: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
7624:
7625: =back
7626:
7627: =head1 PRIVATE SUBROUTINES
7628:
7629: =head2 Underlying communication routines (Shouldn't call)
7630:
7631: =over 4
7632:
7633: =item *
7634:
7635: subreply() : tries to pass a message to lonc, returns con_lost if incapable
7636:
7637: =item *
7638:
7639: reply() : uses subreply to send a message to remote machine, logs all failures
7640:
7641: =item *
7642:
7643: critical() : passes a critical message to another server; if cannot
7644: get through then place message in connection buffer directory and
7645: returns con_delayed, if incapable of saving message, returns
7646: con_failed
7647:
7648: =item *
7649:
7650: reconlonc() : tries to reconnect lonc client processes.
7651:
7652: =back
7653:
7654: =head2 Resource Access Logging
7655:
7656: =over 4
7657:
7658: =item *
7659:
7660: flushcourselogs() : flush (save) buffer logs and access logs
7661:
7662: =item *
7663:
7664: courselog($what) : save message for course in hash
7665:
7666: =item *
7667:
7668: courseacclog($what) : save message for course using &courselog(). Perform
7669: special processing for specific resource types (problems, exams, quizzes, etc).
7670:
7671: =item *
7672:
7673: goodbye() : flush course logs and log shutting down; it is called in srm.conf
7674: as a PerlChildExitHandler
7675:
7676: =back
7677:
7678: =head2 Other
7679:
7680: =over 4
7681:
7682: =item *
7683:
7684: symblist($mapname,%newhash) : update symbolic storage links
7685:
7686: =back
7687:
7688: =cut
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