File:
[LON-CAPA] /
loncom /
lonnet /
perl /
lonnet.pm
Revision
1.491:
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Thu Apr 29 07:57:47 2004 UTC (20 years, 3 months ago) by
albertel
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MAIN
CVS tags:
HEAD
- can now grade an Anonymous exam
- CODE is noticed by rndseed in either the student record
(Apache::lonhomework::history) or %ENV and used
- analyze mode now needs student data loaded and does so
- CODE is stored into student data
1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.491 2004/04/29 07:57:47 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonnet;
31:
32: use strict;
33: use LWP::UserAgent();
34: use HTTP::Headers;
35: use HTTP::Date;
36: # use Date::Parse;
37: use vars
38: qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom
39: %libserv %pr %prp %metacache %packagetab %titlecache %courseresversioncache %resversioncache
40: %courselogs %accesshash %userrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseresdatacache
42: %userresdatacache %usectioncache %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir);
44:
45: use IO::Socket;
46: use GDBM_File;
47: use Apache::Constants qw(:common :http);
48: use HTML::LCParser;
49: use Fcntl qw(:flock);
50: use Apache::loncoursedata;
51: use Apache::lonlocal;
52: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw);
53: use Time::HiRes();
54: my $readit;
55:
56: =pod
57:
58: =head1 Package Variables
59:
60: These are largely undocumented, so if you decipher one please note it here.
61:
62: =over 4
63:
64: =item $processmarker
65:
66: Contains the time this process was started and this servers host id.
67:
68: =item $dumpcount
69:
70: Counts the number of times a message log flush has been attempted (regardless
71: of success) by this process. Used as part of the filename when messages are
72: delayed.
73:
74: =back
75:
76: =cut
77:
78:
79: # --------------------------------------------------------------------- Logging
80:
81: sub logtouch {
82: my $execdir=$perlvar{'lonDaemons'};
83: unless (-e "$execdir/logs/lonnet.log") {
84: open(my $fh,">>$execdir/logs/lonnet.log");
85: close $fh;
86: }
87: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
88: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
89: }
90:
91: sub logthis {
92: my $message=shift;
93: my $execdir=$perlvar{'lonDaemons'};
94: my $now=time;
95: my $local=localtime($now);
96: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
97: print $fh "$local ($$): $message\n";
98: close($fh);
99: }
100: return 1;
101: }
102:
103: sub logperm {
104: my $message=shift;
105: my $execdir=$perlvar{'lonDaemons'};
106: my $now=time;
107: my $local=localtime($now);
108: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
109: print $fh "$now:$message:$local\n";
110: close($fh);
111: }
112: return 1;
113: }
114:
115: # -------------------------------------------------- Non-critical communication
116: sub subreply {
117: my ($cmd,$server)=@_;
118: my $peerfile="$perlvar{'lonSockDir'}/$server";
119: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
120: Type => SOCK_STREAM,
121: Timeout => 10)
122: or return "con_lost";
123: print $client "$cmd\n";
124: my $answer=<$client>;
125: if (!$answer) { $answer="con_lost"; }
126: chomp($answer);
127: return $answer;
128: }
129:
130: sub reply {
131: my ($cmd,$server)=@_;
132: unless (defined($hostname{$server})) { return 'no_such_host'; }
133: my $answer=subreply($cmd,$server);
134: if ($answer eq 'con_lost') {
135: #sleep 5;
136: #$answer=subreply($cmd,$server);
137: #if ($answer eq 'con_lost') {
138: # &logthis("Second attempt con_lost on $server");
139: # my $peerfile="$perlvar{'lonSockDir'}/$server";
140: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
141: # Type => SOCK_STREAM,
142: # Timeout => 10)
143: # or return "con_lost";
144: # &logthis("Killing socket");
145: # print $client "close_connection_exit\n";
146: #sleep 5;
147: # $answer=subreply($cmd,$server);
148: #}
149: }
150: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
151: &logthis("<font color=blue>WARNING:".
152: " $cmd to $server returned $answer</font>");
153: }
154: return $answer;
155: }
156:
157: # ----------------------------------------------------------- Send USR1 to lonc
158:
159: sub reconlonc {
160: my $peerfile=shift;
161: &logthis("Trying to reconnect for $peerfile");
162: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
163: if (open(my $fh,"<$loncfile")) {
164: my $loncpid=<$fh>;
165: chomp($loncpid);
166: if (kill 0 => $loncpid) {
167: &logthis("lonc at pid $loncpid responding, sending USR1");
168: kill USR1 => $loncpid;
169: sleep 1;
170: if (-e "$peerfile") { return; }
171: &logthis("$peerfile still not there, give it another try");
172: sleep 5;
173: if (-e "$peerfile") { return; }
174: &logthis(
175: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
176: } else {
177: &logthis(
178: "<font color=blue>WARNING:".
179: " lonc at pid $loncpid not responding, giving up</font>");
180: }
181: } else {
182: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
183: }
184: }
185:
186: # ------------------------------------------------------ Critical communication
187:
188: sub critical {
189: my ($cmd,$server)=@_;
190: unless ($hostname{$server}) {
191: &logthis("<font color=blue>WARNING:".
192: " Critical message to unknown server ($server)</font>");
193: return 'no_such_host';
194: }
195: my $answer=reply($cmd,$server);
196: if ($answer eq 'con_lost') {
197: my $pingreply=reply('ping',$server);
198: &reconlonc("$perlvar{'lonSockDir'}/$server");
199: my $pongreply=reply('pong',$server);
200: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
201: $answer=reply($cmd,$server);
202: if ($answer eq 'con_lost') {
203: my $now=time;
204: my $middlename=$cmd;
205: $middlename=substr($middlename,0,16);
206: $middlename=~s/\W//g;
207: my $dfilename=
208: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
209: $dumpcount++;
210: {
211: my $dfh;
212: if (open($dfh,">$dfilename")) {
213: print $dfh "$cmd\n";
214: close($dfh);
215: }
216: }
217: sleep 2;
218: my $wcmd='';
219: {
220: my $dfh;
221: if (open($dfh,"<$dfilename")) {
222: $wcmd=<$dfh>;
223: close($dfh);
224: }
225: }
226: chomp($wcmd);
227: if ($wcmd eq $cmd) {
228: &logthis("<font color=blue>WARNING: ".
229: "Connection buffer $dfilename: $cmd</font>");
230: &logperm("D:$server:$cmd");
231: return 'con_delayed';
232: } else {
233: &logthis("<font color=red>CRITICAL:"
234: ." Critical connection failed: $server $cmd</font>");
235: &logperm("F:$server:$cmd");
236: return 'con_failed';
237: }
238: }
239: }
240: return $answer;
241: }
242:
243: #
244: # -------------- Remove all key from the env that start witha lowercase letter
245: # (Which is always a lon-capa value)
246:
247: sub cleanenv {
248: # unless (defined(&Apache::exists_config_define("MODPERL2"))) { return; }
249: # unless (&Apache::exists_config_define("MODPERL2")) { return; }
250: foreach my $key (keys(%ENV)) {
251: if ($key =~ /^[a-z]/) {
252: delete($ENV{$key});
253: }
254: }
255: }
256:
257: # ------------------------------------------- Transfer profile into environment
258:
259: sub transfer_profile_to_env {
260: my ($lonidsdir,$handle)=@_;
261: my @profile;
262: {
263: open(my $idf,"$lonidsdir/$handle.id");
264: flock($idf,LOCK_SH);
265: @profile=<$idf>;
266: close($idf);
267: }
268: my $envi;
269: my %Remove;
270: for ($envi=0;$envi<=$#profile;$envi++) {
271: chomp($profile[$envi]);
272: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
273: $ENV{$envname} = $envvalue;
274: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
275: if ($time < time-300) {
276: $Remove{$key}++;
277: }
278: }
279: }
280: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
281: foreach my $expired_key (keys(%Remove)) {
282: &delenv($expired_key);
283: }
284: }
285:
286: # ---------------------------------------------------------- Append Environment
287:
288: sub appenv {
289: my %newenv=@_;
290: foreach (keys %newenv) {
291: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
292: &logthis("<font color=blue>WARNING: ".
293: "Attempt to modify environment ".$_." to ".$newenv{$_}
294: .'</font>');
295: delete($newenv{$_});
296: } else {
297: $ENV{$_}=$newenv{$_};
298: }
299: }
300:
301: my $lockfh;
302: unless (open($lockfh,"$ENV{'user.environment'}")) {
303: return 'error: '.$!;
304: }
305: unless (flock($lockfh,LOCK_EX)) {
306: &logthis("<font color=blue>WARNING: ".
307: 'Could not obtain exclusive lock in appenv: '.$!);
308: close($lockfh);
309: return 'error: '.$!;
310: }
311:
312: my @oldenv;
313: {
314: my $fh;
315: unless (open($fh,"$ENV{'user.environment'}")) {
316: return 'error: '.$!;
317: }
318: @oldenv=<$fh>;
319: close($fh);
320: }
321: for (my $i=0; $i<=$#oldenv; $i++) {
322: chomp($oldenv[$i]);
323: if ($oldenv[$i] ne '') {
324: my ($name,$value)=split(/=/,$oldenv[$i]);
325: unless (defined($newenv{$name})) {
326: $newenv{$name}=$value;
327: }
328: }
329: }
330: {
331: my $fh;
332: unless (open($fh,">$ENV{'user.environment'}")) {
333: return 'error';
334: }
335: my $newname;
336: foreach $newname (keys %newenv) {
337: print $fh "$newname=$newenv{$newname}\n";
338: }
339: close($fh);
340: }
341:
342: close($lockfh);
343: return 'ok';
344: }
345: # ----------------------------------------------------- Delete from Environment
346:
347: sub delenv {
348: my $delthis=shift;
349: my %newenv=();
350: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
351: &logthis("<font color=blue>WARNING: ".
352: "Attempt to delete from environment ".$delthis);
353: return 'error';
354: }
355: my @oldenv;
356: {
357: my $fh;
358: unless (open($fh,"$ENV{'user.environment'}")) {
359: return 'error';
360: }
361: unless (flock($fh,LOCK_SH)) {
362: &logthis("<font color=blue>WARNING: ".
363: 'Could not obtain shared lock in delenv: '.$!);
364: close($fh);
365: return 'error: '.$!;
366: }
367: @oldenv=<$fh>;
368: close($fh);
369: }
370: {
371: my $fh;
372: unless (open($fh,">$ENV{'user.environment'}")) {
373: return 'error';
374: }
375: unless (flock($fh,LOCK_EX)) {
376: &logthis("<font color=blue>WARNING: ".
377: 'Could not obtain exclusive lock in delenv: '.$!);
378: close($fh);
379: return 'error: '.$!;
380: }
381: foreach (@oldenv) {
382: if ($_=~/^$delthis/) {
383: my ($key,undef) = split('=',$_);
384: delete($ENV{$key});
385: } else {
386: print $fh $_;
387: }
388: }
389: close($fh);
390: }
391: return 'ok';
392: }
393:
394: # ------------------------------------------ Find out current server userload
395: # there is a copy in lond
396: sub userload {
397: my $numusers=0;
398: {
399: opendir(LONIDS,$perlvar{'lonIDsDir'});
400: my $filename;
401: my $curtime=time;
402: while ($filename=readdir(LONIDS)) {
403: if ($filename eq '.' || $filename eq '..') {next;}
404: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
405: if ($curtime-$mtime < 1800) { $numusers++; }
406: }
407: closedir(LONIDS);
408: }
409: my $userloadpercent=0;
410: my $maxuserload=$perlvar{'lonUserLoadLim'};
411: if ($maxuserload) {
412: $userloadpercent=100*$numusers/$maxuserload;
413: }
414: $userloadpercent=sprintf("%.2f",$userloadpercent);
415: return $userloadpercent;
416: }
417:
418: # ------------------------------------------ Fight off request when overloaded
419:
420: sub overloaderror {
421: my ($r,$checkserver)=@_;
422: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
423: my $loadavg;
424: if ($checkserver eq $perlvar{'lonHostID'}) {
425: open(my $loadfile,'/proc/loadavg');
426: $loadavg=<$loadfile>;
427: $loadavg =~ s/\s.*//g;
428: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
429: close($loadfile);
430: } else {
431: $loadavg=&reply('load',$checkserver);
432: }
433: my $overload=$loadavg-100;
434: if ($overload>0) {
435: $r->err_headers_out->{'Retry-After'}=$overload;
436: $r->log_error('Overload of '.$overload.' on '.$checkserver);
437: return 413;
438: }
439: return '';
440: }
441:
442: # ------------------------------ Find server with least workload from spare.tab
443:
444: sub spareserver {
445: my ($loadpercent,$userloadpercent) = @_;
446: my $tryserver;
447: my $spareserver='';
448: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
449: my $lowestserver=$loadpercent > $userloadpercent?
450: $loadpercent : $userloadpercent;
451: foreach $tryserver (keys %spareid) {
452: my $loadans=reply('load',$tryserver);
453: my $userloadans=reply('userload',$tryserver);
454: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
455: next; #didn't get a number from the server
456: }
457: my $answer;
458: if ($loadans =~ /\d/) {
459: if ($userloadans =~ /\d/) {
460: #both are numbers, pick the bigger one
461: $answer=$loadans > $userloadans?
462: $loadans : $userloadans;
463: } else {
464: $answer = $loadans;
465: }
466: } else {
467: $answer = $userloadans;
468: }
469: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
470: $spareserver="http://$hostname{$tryserver}";
471: $lowestserver=$answer;
472: }
473: }
474: return $spareserver;
475: }
476:
477: # --------------------------------------------- Try to change a user's password
478:
479: sub changepass {
480: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
481: $currentpass = &escape($currentpass);
482: $newpass = &escape($newpass);
483: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
484: $server);
485: if (! $answer) {
486: &logthis("No reply on password change request to $server ".
487: "by $uname in domain $udom.");
488: } elsif ($answer =~ "^ok") {
489: &logthis("$uname in $udom successfully changed their password ".
490: "on $server.");
491: } elsif ($answer =~ "^pwchange_failure") {
492: &logthis("$uname in $udom was unable to change their password ".
493: "on $server. The action was blocked by either lcpasswd ".
494: "or pwchange");
495: } elsif ($answer =~ "^non_authorized") {
496: &logthis("$uname in $udom did not get their password correct when ".
497: "attempting to change it on $server.");
498: } elsif ($answer =~ "^auth_mode_error") {
499: &logthis("$uname in $udom attempted to change their password despite ".
500: "not being locally or internally authenticated on $server.");
501: } elsif ($answer =~ "^unknown_user") {
502: &logthis("$uname in $udom attempted to change their password ".
503: "on $server but were unable to because $server is not ".
504: "their home server.");
505: } elsif ($answer =~ "^refused") {
506: &logthis("$server refused to change $uname in $udom password because ".
507: "it was sent an unencrypted request to change the password.");
508: }
509: return $answer;
510: }
511:
512: # ----------------------- Try to determine user's current authentication scheme
513:
514: sub queryauthenticate {
515: my ($uname,$udom)=@_;
516: my $uhome=&homeserver($uname,$udom);
517: if (!$uhome) {
518: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
519: return 'no_host';
520: }
521: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
522: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
523: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
524: }
525: return $answer;
526: }
527:
528: # --------- Try to authenticate user from domain's lib servers (first this one)
529:
530: sub authenticate {
531: my ($uname,$upass,$udom)=@_;
532: $upass=escape($upass);
533: $uname=~s/\W//g;
534: my $uhome=&homeserver($uname,$udom);
535: if (!$uhome) {
536: &logthis("User $uname at $udom is unknown in authenticate");
537: return 'no_host';
538: }
539: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
540: if ($answer eq 'authorized') {
541: &logthis("User $uname at $udom authorized by $uhome");
542: return $uhome;
543: }
544: if ($answer eq 'non_authorized') {
545: &logthis("User $uname at $udom rejected by $uhome");
546: return 'no_host';
547: }
548: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
549: return 'no_host';
550: }
551:
552: # ---------------------- Find the homebase for a user from domain's lib servers
553:
554: sub homeserver {
555: my ($uname,$udom,$ignoreBadCache)=@_;
556: my $index="$uname:$udom";
557:
558: my ($result,$cached)=&is_cached(\%homecache,$index,'home',86400);
559: if (defined($cached)) { return $result; }
560: my $tryserver;
561: foreach $tryserver (keys %libserv) {
562: next if ($ignoreBadCache ne 'true' &&
563: exists($badServerCache{$tryserver}));
564: if ($hostdom{$tryserver} eq $udom) {
565: my $answer=reply("home:$udom:$uname",$tryserver);
566: if ($answer eq 'found') {
567: return &do_cache(\%homecache,$index,$tryserver,'home');
568: } elsif ($answer eq 'no_host') {
569: $badServerCache{$tryserver}=1;
570: }
571: }
572: }
573: return 'no_host';
574: }
575:
576: # ------------------------------------- Find the usernames behind a list of IDs
577:
578: sub idget {
579: my ($udom,@ids)=@_;
580: my %returnhash=();
581:
582: my $tryserver;
583: foreach $tryserver (keys %libserv) {
584: if ($hostdom{$tryserver} eq $udom) {
585: my $idlist=join('&',@ids);
586: $idlist=~tr/A-Z/a-z/;
587: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
588: my @answer=();
589: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
590: @answer=split(/\&/,$reply);
591: } ;
592: my $i;
593: for ($i=0;$i<=$#ids;$i++) {
594: if ($answer[$i]) {
595: $returnhash{$ids[$i]}=$answer[$i];
596: }
597: }
598: }
599: }
600: return %returnhash;
601: }
602:
603: # ------------------------------------- Find the IDs behind a list of usernames
604:
605: sub idrget {
606: my ($udom,@unames)=@_;
607: my %returnhash=();
608: foreach (@unames) {
609: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
610: }
611: return %returnhash;
612: }
613:
614: # ------------------------------- Store away a list of names and associated IDs
615:
616: sub idput {
617: my ($udom,%ids)=@_;
618: my %servers=();
619: foreach (keys %ids) {
620: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
621: my $uhom=&homeserver($_,$udom);
622: if ($uhom ne 'no_host') {
623: my $id=&escape($ids{$_});
624: $id=~tr/A-Z/a-z/;
625: my $unam=&escape($_);
626: if ($servers{$uhom}) {
627: $servers{$uhom}.='&'.$id.'='.$unam;
628: } else {
629: $servers{$uhom}=$id.'='.$unam;
630: }
631: }
632: }
633: foreach (keys %servers) {
634: &critical('idput:'.$udom.':'.$servers{$_},$_);
635: }
636: }
637:
638: # --------------------------------------------------- Assign a key to a student
639:
640: sub assign_access_key {
641: #
642: # a valid key looks like uname:udom#comments
643: # comments are being appended
644: #
645: my ($ckey,$cdom,$cnum,$udom,$uname,$logentry)=@_;
646: $cdom=
647: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
648: $cnum=
649: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
650: $udom=$ENV{'user.name'} unless (defined($udom));
651: $uname=$ENV{'user.domain'} unless (defined($uname));
652: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
653: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
654: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
655: # assigned to this person
656: # - this should not happen,
657: # unless something went wrong
658: # the first time around
659: # ready to assign
660: $logentry=$1.'; '.$logentry;
661: if (&put('accesskey',{$ckey=>$uname.':'.$udom.'#'.$logentry},
662: $cdom,$cnum) eq 'ok') {
663: # key now belongs to user
664: my $envkey='key.'.$cdom.'_'.$cnum;
665: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
666: &appenv('environment.'.$envkey => $ckey);
667: return 'ok';
668: } else {
669: return
670: 'error: Count not permanently assign key, will need to be re-entered later.';
671: }
672: } else {
673: return 'error: Could not assign key, try again later.';
674: }
675: } elsif (!$existing{$ckey}) {
676: # the key does not exist
677: return 'error: The key does not exist';
678: } else {
679: # the key is somebody else's
680: return 'error: The key is already in use';
681: }
682: }
683:
684: # ------------------------------------------ put an additional comment on a key
685:
686: sub comment_access_key {
687: #
688: # a valid key looks like uname:udom#comments
689: # comments are being appended
690: #
691: my ($ckey,$cdom,$cnum,$logentry)=@_;
692: $cdom=
693: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
694: $cnum=
695: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
696: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
697: if ($existing{$ckey}) {
698: $existing{$ckey}.='; '.$logentry;
699: # ready to assign
700: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
701: $cdom,$cnum) eq 'ok') {
702: return 'ok';
703: } else {
704: return 'error: Count not store comment.';
705: }
706: } else {
707: # the key does not exist
708: return 'error: The key does not exist';
709: }
710: }
711:
712: # ------------------------------------------------------ Generate a set of keys
713:
714: sub generate_access_keys {
715: my ($number,$cdom,$cnum,$logentry)=@_;
716: $cdom=
717: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
718: $cnum=
719: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
720: unless (&allowed('mky',$cdom)) { return 0; }
721: unless (($cdom) && ($cnum)) { return 0; }
722: if ($number>10000) { return 0; }
723: sleep(2); # make sure don't get same seed twice
724: srand(time()^($$+($$<<15))); # from "Programming Perl"
725: my $total=0;
726: for (my $i=1;$i<=$number;$i++) {
727: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
728: sprintf("%lx",int(100000*rand)).'-'.
729: sprintf("%lx",int(100000*rand));
730: $newkey=~s/1/g/g; # folks mix up 1 and l
731: $newkey=~s/0/h/g; # and also 0 and O
732: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
733: if ($existing{$newkey}) {
734: $i--;
735: } else {
736: if (&put('accesskeys',
737: { $newkey => '# generated '.localtime().
738: ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
739: '; '.$logentry },
740: $cdom,$cnum) eq 'ok') {
741: $total++;
742: }
743: }
744: }
745: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
746: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
747: return $total;
748: }
749:
750: # ------------------------------------------------------- Validate an accesskey
751:
752: sub validate_access_key {
753: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
754: $cdom=
755: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
756: $cnum=
757: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
758: $udom=$ENV{'user.name'} unless (defined($udom));
759: $uname=$ENV{'user.domain'} unless (defined($uname));
760: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
761: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
762: }
763:
764: # ------------------------------------- Find the section of student in a course
765:
766: sub getsection {
767: my ($udom,$unam,$courseid)=@_;
768: $courseid=~s/\_/\//g;
769: $courseid=~s/^(\w)/\/$1/;
770: my %Pending;
771: my %Expired;
772: #
773: # Each role can either have not started yet (pending), be active,
774: # or have expired.
775: #
776: # If there is an active role, we are done.
777: #
778: # If there is more than one role which has not started yet,
779: # choose the one which will start sooner
780: # If there is one role which has not started yet, return it.
781: #
782: # If there is more than one expired role, choose the one which ended last.
783: # If there is a role which has expired, return it.
784: #
785: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
786: &homeserver($unam,$udom)))) {
787: my ($key,$value)=split(/\=/,$_);
788: $key=&unescape($key);
789: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
790: my $section=$1;
791: if ($key eq $courseid.'_st') { $section=''; }
792: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
793: my $now=time;
794: if (defined($end) && ($now > $end)) {
795: $Expired{$end}=$section;
796: next;
797: }
798: if (defined($start) && ($now < $start)) {
799: $Pending{$start}=$section;
800: next;
801: }
802: return $section;
803: }
804: #
805: # Presumedly there will be few matching roles from the above
806: # loop and the sorting time will be negligible.
807: if (scalar(keys(%Pending))) {
808: my ($time) = sort {$a <=> $b} keys(%Pending);
809: return $Pending{$time};
810: }
811: if (scalar(keys(%Expired))) {
812: my @sorted = sort {$a <=> $b} keys(%Expired);
813: my $time = pop(@sorted);
814: return $Expired{$time};
815: }
816: return '-1';
817: }
818:
819:
820: my $disk_caching_disabled=1;
821:
822: sub devalidate_cache {
823: my ($cache,$id,$name) = @_;
824: delete $$cache{$id.'.time'};
825: delete $$cache{$id};
826: if ($disk_caching_disabled) { return; }
827: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
828: open(DB,"$filename.lock");
829: flock(DB,LOCK_EX);
830: my %hash;
831: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
832: eval <<'EVALBLOCK';
833: delete($hash{$id});
834: delete($hash{$id.'.time'});
835: EVALBLOCK
836: if ($@) {
837: &logthis("<font color='red'>devalidate_cache blew up :$@:$name</font>");
838: unlink($filename);
839: }
840: } else {
841: if (-e $filename) {
842: &logthis("Unable to tie hash (devalidate cache): $name");
843: unlink($filename);
844: }
845: }
846: untie(%hash);
847: flock(DB,LOCK_UN);
848: close(DB);
849: }
850:
851: sub is_cached {
852: my ($cache,$id,$name,$time) = @_;
853: if (!$time) { $time=300; }
854: if (!exists($$cache{$id.'.time'})) {
855: &load_cache_item($cache,$name,$id);
856: }
857: if (!exists($$cache{$id.'.time'})) {
858: # &logthis("Didn't find $id");
859: return (undef,undef);
860: } else {
861: if (time-($$cache{$id.'.time'})>$time) {
862: # &logthis("Devalidating $id - ".time-($$cache{$id.'.time'}));
863: &devalidate_cache($cache,$id,$name);
864: return (undef,undef);
865: }
866: }
867: return ($$cache{$id},1);
868: }
869:
870: sub do_cache {
871: my ($cache,$id,$value,$name) = @_;
872: $$cache{$id.'.time'}=time;
873: $$cache{$id}=$value;
874: # &logthis("Caching $id as :$value:");
875: &save_cache_item($cache,$name,$id);
876: # do_cache implictly return the set value
877: $$cache{$id};
878: }
879:
880: sub save_cache_item {
881: my ($cache,$name,$id)=@_;
882: if ($disk_caching_disabled) { return; }
883: my $starttime=&Time::HiRes::time();
884: # &logthis("Saving :$name:$id");
885: my %hash;
886: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
887: open(DB,"$filename.lock");
888: flock(DB,LOCK_EX);
889: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
890: eval <<'EVALBLOCK';
891: $hash{$id.'.time'}=$$cache{$id.'.time'};
892: $hash{$id}=freeze({'item'=>$$cache{$id}});
893: EVALBLOCK
894: if ($@) {
895: &logthis("<font color='red'>save_cache blew up :$@:$name</font>");
896: unlink($filename);
897: }
898: } else {
899: if (-e $filename) {
900: &logthis("Unable to tie hash (save cache item): $name ($!)");
901: unlink($filename);
902: }
903: }
904: untie(%hash);
905: flock(DB,LOCK_UN);
906: close(DB);
907: # &logthis("save_cache_item $name took ".(&Time::HiRes::time()-$starttime));
908: }
909:
910: sub load_cache_item {
911: my ($cache,$name,$id)=@_;
912: if ($disk_caching_disabled) { return; }
913: my $starttime=&Time::HiRes::time();
914: # &logthis("Before Loading $name for $id size is ".scalar(%$cache));
915: my %hash;
916: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
917: open(DB,"$filename.lock");
918: flock(DB,LOCK_SH);
919: if (tie(%hash,'GDBM_File',$filename,&GDBM_READER(),0640)) {
920: eval <<'EVALBLOCK';
921: if (!%$cache) {
922: my $count;
923: while (my ($key,$value)=each(%hash)) {
924: $count++;
925: if ($key =~ /\.time$/) {
926: $$cache{$key}=$value;
927: } else {
928: my $hashref=thaw($value);
929: $$cache{$key}=$hashref->{'item'};
930: }
931: }
932: # &logthis("Initial load: $count");
933: } else {
934: my $hashref=thaw($hash{$id});
935: $$cache{$id}=$hashref->{'item'};
936: $$cache{$id.'.time'}=$hash{$id.'.time'};
937: }
938: EVALBLOCK
939: if ($@) {
940: &logthis("<font color='red'>load_cache blew up :$@:$name</font>");
941: unlink($filename);
942: }
943: } else {
944: if (-e $filename) {
945: &logthis("Unable to tie hash (load cache item): $name ($!)");
946: unlink($filename);
947: }
948: }
949: untie(%hash);
950: flock(DB,LOCK_UN);
951: close(DB);
952: # &logthis("After Loading $name size is ".scalar(%$cache));
953: # &logthis("load_cache_item $name took ".(&Time::HiRes::time()-$starttime));
954: }
955:
956: sub usection {
957: my ($udom,$unam,$courseid)=@_;
958: my $hashid="$udom:$unam:$courseid";
959:
960: my ($result,$cached)=&is_cached(\%usectioncache,$hashid,'usection');
961: if (defined($cached)) { return $result; }
962: $courseid=~s/\_/\//g;
963: $courseid=~s/^(\w)/\/$1/;
964: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
965: &homeserver($unam,$udom)))) {
966: my ($key,$value)=split(/\=/,$_);
967: $key=&unescape($key);
968: if ($key=~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/) {
969: my $section=$1;
970: if ($key eq $courseid.'_st') { $section=''; }
971: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
972: my $now=time;
973: my $notactive=0;
974: if ($start) {
975: if ($now<$start) { $notactive=1; }
976: }
977: if ($end) {
978: if ($now>$end) { $notactive=1; }
979: }
980: unless ($notactive) {
981: return &do_cache(\%usectioncache,$hashid,$section,'usection');
982: }
983: }
984: }
985: return &do_cache(\%usectioncache,$hashid,'-1','usection');
986: }
987:
988: # ------------------------------------- Read an entry from a user's environment
989:
990: sub userenvironment {
991: my ($udom,$unam,@what)=@_;
992: my %returnhash=();
993: my @answer=split(/\&/,
994: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
995: &homeserver($unam,$udom)));
996: my $i;
997: for ($i=0;$i<=$#what;$i++) {
998: $returnhash{$what[$i]}=&unescape($answer[$i]);
999: }
1000: return %returnhash;
1001: }
1002:
1003: # -------------------------------------------------------------------- New chat
1004:
1005: sub chatsend {
1006: my ($newentry,$anon)=@_;
1007: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1008: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1009: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1010: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1011: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
1012: &escape($newentry)),$chome);
1013: }
1014:
1015: # ------------------------------------------ Find current version of a resource
1016:
1017: sub getversion {
1018: my $fname=&clutter(shift);
1019: unless ($fname=~/^\/res\//) { return -1; }
1020: return ¤tversion(&filelocation('',$fname));
1021: }
1022:
1023: sub currentversion {
1024: my $fname=shift;
1025: my ($result,$cached)=&is_cached(\%resversioncache,$fname,'resversion',600);
1026: if (defined($cached)) { return $result; }
1027: my $author=$fname;
1028: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1029: my ($udom,$uname)=split(/\//,$author);
1030: my $home=homeserver($uname,$udom);
1031: if ($home eq 'no_host') {
1032: return -1;
1033: }
1034: my $answer=reply("currentversion:$fname",$home);
1035: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1036: return -1;
1037: }
1038: return &do_cache(\%resversioncache,$fname,$answer,'resversion');
1039: }
1040:
1041: # ----------------------------- Subscribe to a resource, return URL if possible
1042:
1043: sub subscribe {
1044: my $fname=shift;
1045: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1046: my $author=$fname;
1047: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1048: my ($udom,$uname)=split(/\//,$author);
1049: my $home=homeserver($uname,$udom);
1050: if ($home eq 'no_host') {
1051: return 'not_found';
1052: }
1053: my $answer=reply("sub:$fname",$home);
1054: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1055: $answer.=' by '.$home;
1056: }
1057: return $answer;
1058: }
1059:
1060: # -------------------------------------------------------------- Replicate file
1061:
1062: sub repcopy {
1063: my $filename=shift;
1064: $filename=~s/\/+/\//g;
1065: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
1066: my $transname="$filename.in.transfer";
1067: if ((-e $filename) || (-e $transname)) { return OK; }
1068: my $remoteurl=subscribe($filename);
1069: if ($remoteurl =~ /^con_lost by/) {
1070: &logthis("Subscribe returned $remoteurl: $filename");
1071: return HTTP_SERVICE_UNAVAILABLE;
1072: } elsif ($remoteurl eq 'not_found') {
1073: #&logthis("Subscribe returned not_found: $filename");
1074: return HTTP_NOT_FOUND;
1075: } elsif ($remoteurl =~ /^rejected by/) {
1076: &logthis("Subscribe returned $remoteurl: $filename");
1077: return FORBIDDEN;
1078: } elsif ($remoteurl eq 'directory') {
1079: return OK;
1080: } else {
1081: my $author=$filename;
1082: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1083: my ($udom,$uname)=split(/\//,$author);
1084: my $home=homeserver($uname,$udom);
1085: unless ($home eq $perlvar{'lonHostID'}) {
1086: my @parts=split(/\//,$filename);
1087: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1088: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1089: &logthis("Malconfiguration for replication: $filename");
1090: return HTTP_BAD_REQUEST;
1091: }
1092: my $count;
1093: for ($count=5;$count<$#parts;$count++) {
1094: $path.="/$parts[$count]";
1095: if ((-e $path)!=1) {
1096: mkdir($path,0777);
1097: }
1098: }
1099: my $ua=new LWP::UserAgent;
1100: my $request=new HTTP::Request('GET',"$remoteurl");
1101: my $response=$ua->request($request,$transname);
1102: if ($response->is_error()) {
1103: unlink($transname);
1104: my $message=$response->status_line;
1105: &logthis("<font color=blue>WARNING:"
1106: ." LWP get: $message: $filename</font>");
1107: return HTTP_SERVICE_UNAVAILABLE;
1108: } else {
1109: if ($remoteurl!~/\.meta$/) {
1110: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1111: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1112: if ($mresponse->is_error()) {
1113: unlink($filename.'.meta');
1114: &logthis(
1115: "<font color=yellow>INFO: No metadata: $filename</font>");
1116: }
1117: }
1118: rename($transname,$filename);
1119: return OK;
1120: }
1121: }
1122: }
1123: }
1124:
1125: # ------------------------------------------------ Get server side include body
1126: sub ssi_body {
1127: my ($filelink,%form)=@_;
1128: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1129: &ssi($filelink,%form));
1130: $output=~s/^.*?\<body[^\>]*\>//si;
1131: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1132: $output=~
1133: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
1134: return $output;
1135: }
1136:
1137: # --------------------------------------------------------- Server Side Include
1138:
1139: sub ssi {
1140:
1141: my ($fn,%form)=@_;
1142:
1143: my $ua=new LWP::UserAgent;
1144:
1145: my $request;
1146:
1147: if (%form) {
1148: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1149: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1150: } else {
1151: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1152: }
1153:
1154: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1155: my $response=$ua->request($request);
1156:
1157: return $response->content;
1158: }
1159:
1160: sub externalssi {
1161: my ($url)=@_;
1162: my $ua=new LWP::UserAgent;
1163: my $request=new HTTP::Request('GET',$url);
1164: my $response=$ua->request($request);
1165: return $response->content;
1166: }
1167:
1168: # ------- Add a token to a remote URI's query string to vouch for access rights
1169:
1170: sub tokenwrapper {
1171: my $uri=shift;
1172: $uri=~s/^http\:\/\/([^\/]+)//;
1173: $uri=~s/^\///;
1174: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
1175: my $token=$1;
1176: # if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
1177: if ($uri=~m|^uploaded/([^/]+)/([^/]+)/(.+)(\?\.*)*$|) {
1178: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
1179: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
1180: (($uri=~/\?/)?'&':'?').'token='.$token.
1181: '&tokenissued='.$perlvar{'lonHostID'};
1182: } else {
1183: return '/adm/notfound.html';
1184: }
1185: }
1186:
1187: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1188: # input: action, courseID, current domain, home server for course, intended
1189: # path to file, source of file.
1190: # output: url to file (if action was uploaddoc),
1191: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1192: #
1193: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1194: # course.
1195: #
1196: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1197: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1198: # course's home server.
1199: #
1200: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1201: # be copied from $source (current location) to
1202: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1203: # and will then be copied to
1204: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1205: # course's home server.
1206: #
1207: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1208: # will be retrived from $ENV{form.uploaddoc} (from DOCS interface) to
1209: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1210: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1211: # in course's home server.
1212:
1213:
1214: sub process_coursefile {
1215: my ($action,$docuname,$docudom,$docuhome,$file,$source)=@_;
1216: my $fetchresult;
1217: if ($action eq 'propagate') {
1218: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file
1219: ,$docuhome);
1220: } else {
1221: my $fetchresult = '';
1222: my $fpath = '';
1223: my $fname = $file;
1224: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1225: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1226: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1227: unless ($fpath eq '') {
1228: my @parts=split('/',$fpath);
1229: foreach my $part (@parts) {
1230: $filepath.= '/'.$part;
1231: if ((-e $filepath)!=1) {
1232: mkdir($filepath,0777);
1233: }
1234: }
1235: }
1236: if ($action eq 'copy') {
1237: if ($source eq '') {
1238: $fetchresult = 'no source file';
1239: return $fetchresult;
1240: } else {
1241: my $destination = $filepath.'/'.$fname;
1242: rename($source,$destination);
1243: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1244: $docuhome);
1245: }
1246: } elsif ($action eq 'uploaddoc') {
1247: open(my $fh,'>'.$filepath.'/'.$fname);
1248: print $fh $ENV{'form.'.$source};
1249: close($fh);
1250: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1251: $docuhome);
1252: if ($fetchresult eq 'ok') {
1253: return '/uploaded/'.$fpath.'/'.$fname;
1254: } else {
1255: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1256: ' to host '.$docuhome.': '.$fetchresult);
1257: return '/adm/notfound.html';
1258: }
1259: }
1260: }
1261: unless ( $fetchresult eq 'ok') {
1262: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1263: ' to host '.$docuhome.': '.$fetchresult);
1264: }
1265: return $fetchresult;
1266: }
1267:
1268: # --------------- Take an uploaded file and put it into the userfiles directory
1269: # input: name of form element, coursedoc=1 means this is for the course
1270: # output: url of file in userspace
1271:
1272: sub userfileupload {
1273: my ($formname,$coursedoc)=@_;
1274: my $fname=$ENV{'form.'.$formname.'.filename'};
1275: # Replace Windows backslashes by forward slashes
1276: $fname=~s/\\/\//g;
1277: # Get rid of everything but the actual filename
1278: $fname=~s/^.*\/([^\/]+)$/$1/;
1279: # Replace spaces by underscores
1280: $fname=~s/\s+/\_/g;
1281: # Replace all other weird characters by nothing
1282: $fname=~s/[^\w\.\-]//g;
1283: # See if there is anything left
1284: unless ($fname) { return 'error: no uploaded file'; }
1285: chop($ENV{'form.'.$formname});
1286: # Create the directory if not present
1287: my $docuname='';
1288: my $docudom='';
1289: my $docuhome='';
1290: if ($coursedoc) {
1291: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1292: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1293: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1294: if ($ENV{'form.folder'} =~ m/^default/) {
1295: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1296: } else {
1297: $fname=$ENV{'form.folder'}.'/'.$fname;
1298: return &process_coursefile('uploaddoc',$docuname,$docudom,$docuhome,$fname,$formname);
1299: }
1300: } else {
1301: $docuname=$ENV{'user.name'};
1302: $docudom=$ENV{'user.domain'};
1303: $docuhome=$ENV{'user.home'};
1304: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1305: }
1306: }
1307:
1308: sub finishuserfileupload {
1309: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1310: my $path=$docudom.'/'.$docuname.'/';
1311: my $filepath=$perlvar{'lonDocRoot'};
1312: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1313: my $count;
1314: for ($count=4;$count<=$#parts;$count++) {
1315: $filepath.="/$parts[$count]";
1316: if ((-e $filepath)!=1) {
1317: mkdir($filepath,0777);
1318: }
1319: }
1320: # Save the file
1321: {
1322: open(my $fh,'>'.$filepath.'/'.$fname);
1323: print $fh $ENV{'form.'.$formname};
1324: close($fh);
1325: }
1326: # Notify homeserver to grep it
1327: #
1328: my $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,
1329: $docuhome);
1330: if ($fetchresult eq 'ok') {
1331: #
1332: # Return the URL to it
1333: return '/uploaded/'.$path.$fname;
1334: } else {
1335: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
1336: ' to host '.$docuhome.': '.$fetchresult);
1337: return '/adm/notfound.html';
1338: }
1339: }
1340:
1341: sub removeuserfile {
1342: my ($docuname,$docudom,$fname)=@_;
1343: my $home=&homeserver($docuname,$docudom);
1344: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1345: }
1346:
1347: # ------------------------------------------------------------------------- Log
1348:
1349: sub log {
1350: my ($dom,$nam,$hom,$what)=@_;
1351: return critical("log:$dom:$nam:$what",$hom);
1352: }
1353:
1354: # ------------------------------------------------------------------ Course Log
1355: #
1356: # This routine flushes several buffers of non-mission-critical nature
1357: #
1358:
1359: sub flushcourselogs {
1360: &logthis('Flushing log buffers');
1361: #
1362: # course logs
1363: # This is a log of all transactions in a course, which can be used
1364: # for data mining purposes
1365: #
1366: # It also collects the courseid database, which lists last transaction
1367: # times and course titles for all courseids
1368: #
1369: my %courseidbuffer=();
1370: foreach (keys %courselogs) {
1371: my $crsid=$_;
1372: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1373: &escape($courselogs{$crsid}),
1374: $coursehombuf{$crsid}) eq 'ok') {
1375: delete $courselogs{$crsid};
1376: } else {
1377: &logthis('Failed to flush log buffer for '.$crsid);
1378: if (length($courselogs{$crsid})>40000) {
1379: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1380: " exceeded maximum size, deleting.</font>");
1381: delete $courselogs{$crsid};
1382: }
1383: }
1384: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1385: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1386: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1387: } else {
1388: $courseidbuffer{$coursehombuf{$crsid}}=
1389: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1390: }
1391: }
1392: #
1393: # Write course id database (reverse lookup) to homeserver of courses
1394: # Is used in pickcourse
1395: #
1396: foreach (keys %courseidbuffer) {
1397: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1398: }
1399: #
1400: # File accesses
1401: # Writes to the dynamic metadata of resources to get hit counts, etc.
1402: #
1403: foreach my $entry (keys(%accesshash)) {
1404: if ($entry =~ /___count$/) {
1405: my ($dom,$name);
1406: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1407: if (! defined($dom) || $dom eq '' ||
1408: ! defined($name) || $name eq '') {
1409: my $cid = $ENV{'request.course.id'};
1410: $dom = $ENV{'request.'.$cid.'.domain'};
1411: $name = $ENV{'request.'.$cid.'.num'};
1412: }
1413: my $value = $accesshash{$entry};
1414: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1415: my %temphash=($url => $value);
1416: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1417: if ($result eq 'ok') {
1418: delete $accesshash{$entry};
1419: } elsif ($result eq 'unknown_cmd') {
1420: # Target server has old code running on it.
1421: my %temphash=($entry => $value);
1422: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1423: delete $accesshash{$entry};
1424: }
1425: }
1426: } else {
1427: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1428: my %temphash=($entry => $accesshash{$entry});
1429: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1430: delete $accesshash{$entry};
1431: }
1432: }
1433: }
1434: #
1435: # Roles
1436: # Reverse lookup of user roles for course faculty/staff and co-authorship
1437: #
1438: foreach (keys %userrolehash) {
1439: my $entry=$_;
1440: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1441: split(/\:/,$entry);
1442: if (&Apache::lonnet::put('nohist_userroles',
1443: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1444: $rudom,$runame) eq 'ok') {
1445: delete $userrolehash{$entry};
1446: }
1447: }
1448: $dumpcount++;
1449: }
1450:
1451: sub courselog {
1452: my $what=shift;
1453: $what=time.':'.$what;
1454: unless ($ENV{'request.course.id'}) { return ''; }
1455: $coursedombuf{$ENV{'request.course.id'}}=
1456: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1457: $coursenumbuf{$ENV{'request.course.id'}}=
1458: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1459: $coursehombuf{$ENV{'request.course.id'}}=
1460: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1461: $coursedescrbuf{$ENV{'request.course.id'}}=
1462: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1463: if (defined $courselogs{$ENV{'request.course.id'}}) {
1464: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1465: } else {
1466: $courselogs{$ENV{'request.course.id'}}.=$what;
1467: }
1468: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1469: &flushcourselogs();
1470: }
1471: }
1472:
1473: sub courseacclog {
1474: my $fnsymb=shift;
1475: unless ($ENV{'request.course.id'}) { return ''; }
1476: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1477: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1478: $what.=':POST';
1479: foreach (keys %ENV) {
1480: if ($_=~/^form\.(.*)/) {
1481: $what.=':'.$1.'='.$ENV{$_};
1482: }
1483: }
1484: }
1485: &courselog($what);
1486: }
1487:
1488: sub countacc {
1489: my $url=&declutter(shift);
1490: return if (! defined($url) || $url eq '');
1491: unless ($ENV{'request.course.id'}) { return ''; }
1492: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1493: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1494: $accesshash{$key}++;
1495: }
1496:
1497: sub linklog {
1498: my ($from,$to)=@_;
1499: $from=&declutter($from);
1500: $to=&declutter($to);
1501: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1502: $accesshash{$to.'___'.$from.'___goto'}=1;
1503: }
1504:
1505: sub userrolelog {
1506: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1507: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1508: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1509: ($trole=~/^cr/) || ($trole=~/^ta/)) {
1510: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1511: $userrolehash
1512: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1513: =$tend.':'.$tstart;
1514: }
1515: }
1516:
1517: sub get_course_adv_roles {
1518: my $cid=shift;
1519: $cid=$ENV{'request.course.id'} unless (defined($cid));
1520: my %coursehash=&coursedescription($cid);
1521: my %nothide=();
1522: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1523: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1524: }
1525: my %returnhash=();
1526: my %dumphash=
1527: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1528: my $now=time;
1529: foreach (keys %dumphash) {
1530: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1531: if (($tstart) && ($tstart<0)) { next; }
1532: if (($tend) && ($tend<$now)) { next; }
1533: if (($tstart) && ($now<$tstart)) { next; }
1534: my ($role,$username,$domain,$section)=split(/\:/,$_);
1535: if ((&privileged($username,$domain)) &&
1536: (!$nothide{$username.':'.$domain})) { next; }
1537: my $key=&plaintext($role);
1538: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1539: if ($returnhash{$key}) {
1540: $returnhash{$key}.=','.$username.':'.$domain;
1541: } else {
1542: $returnhash{$key}=$username.':'.$domain;
1543: }
1544: }
1545: return %returnhash;
1546: }
1547:
1548: sub get_my_roles {
1549: my ($uname,$udom)=@_;
1550: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1551: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1552: my %dumphash=
1553: &dump('nohist_userroles',$udom,$uname);
1554: my %returnhash=();
1555: my $now=time;
1556: foreach (keys %dumphash) {
1557: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1558: if (($tstart) && ($tstart<0)) { next; }
1559: if (($tend) && ($tend<$now)) { next; }
1560: if (($tstart) && ($now<$tstart)) { next; }
1561: my ($role,$username,$domain,$section)=split(/\:/,$_);
1562: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1563: }
1564: return %returnhash;
1565: }
1566:
1567: # ----------------------------------------------------- Frontpage Announcements
1568: #
1569: #
1570:
1571: sub postannounce {
1572: my ($server,$text)=@_;
1573: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1574: unless ($text=~/\w/) { $text=''; }
1575: return &reply('setannounce:'.&escape($text),$server);
1576: }
1577:
1578: sub getannounce {
1579:
1580: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1581: my $announcement='';
1582: while (<$fh>) { $announcement .=$_; }
1583: close($fh);
1584: if ($announcement=~/\w/) {
1585: return
1586: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1587: '<tr><td bgcolor="#FFFFFF"><pre>'.$announcement.'</pre></td></tr></table>';
1588: } else {
1589: return '';
1590: }
1591: } else {
1592: return '';
1593: }
1594: }
1595:
1596: # ---------------------------------------------------------- Course ID routines
1597: # Deal with domain's nohist_courseid.db files
1598: #
1599:
1600: sub courseidput {
1601: my ($domain,$what,$coursehome)=@_;
1602: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1603: }
1604:
1605: sub courseiddump {
1606: my ($domfilter,$descfilter,$sincefilter)=@_;
1607: my %returnhash=();
1608: unless ($domfilter) { $domfilter=''; }
1609: foreach my $tryserver (keys %libserv) {
1610: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1611: foreach (
1612: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1613: $sincefilter.':'.&escape($descfilter),
1614: $tryserver))) {
1615: my ($key,$value)=split(/\=/,$_);
1616: if (($key) && ($value)) {
1617: $returnhash{&unescape($key)}=&unescape($value);
1618: }
1619: }
1620:
1621: }
1622: }
1623: return %returnhash;
1624: }
1625:
1626: #
1627: # ----------------------------------------------------------- Check out an item
1628:
1629: sub checkout {
1630: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1631: my $now=time;
1632: my $lonhost=$perlvar{'lonHostID'};
1633: my $infostr=&escape(
1634: 'CHECKOUTTOKEN&'.
1635: $tuname.'&'.
1636: $tudom.'&'.
1637: $tcrsid.'&'.
1638: $symb.'&'.
1639: $now.'&'.$ENV{'REMOTE_ADDR'});
1640: my $token=&reply('tmpput:'.$infostr,$lonhost);
1641: if ($token=~/^error\:/) {
1642: &logthis("<font color=blue>WARNING: ".
1643: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1644: "</font>");
1645: return '';
1646: }
1647:
1648: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1649: $token=~tr/a-z/A-Z/;
1650:
1651: my %infohash=('resource.0.outtoken' => $token,
1652: 'resource.0.checkouttime' => $now,
1653: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1654:
1655: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1656: return '';
1657: } else {
1658: &logthis("<font color=blue>WARNING: ".
1659: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1660: "</font>");
1661: }
1662:
1663: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1664: &escape('Checkout '.$infostr.' - '.
1665: $token)) ne 'ok') {
1666: return '';
1667: } else {
1668: &logthis("<font color=blue>WARNING: ".
1669: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1670: "</font>");
1671: }
1672: return $token;
1673: }
1674:
1675: # ------------------------------------------------------------ Check in an item
1676:
1677: sub checkin {
1678: my $token=shift;
1679: my $now=time;
1680: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1681: $lonhost=~tr/A-Z/a-z/;
1682: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1683: $dtoken=~s/\W/\_/g;
1684: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1685: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1686:
1687: unless (($tuname) && ($tudom)) {
1688: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1689: return '';
1690: }
1691:
1692: unless (&allowed('mgr',$tcrsid)) {
1693: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1694: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1695: return '';
1696: }
1697:
1698: my %infohash=('resource.0.intoken' => $token,
1699: 'resource.0.checkintime' => $now,
1700: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1701:
1702: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1703: return '';
1704: }
1705:
1706: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1707: &escape('Checkin - '.$token)) ne 'ok') {
1708: return '';
1709: }
1710:
1711: return ($symb,$tuname,$tudom,$tcrsid);
1712: }
1713:
1714: # --------------------------------------------- Set Expire Date for Spreadsheet
1715:
1716: sub expirespread {
1717: my ($uname,$udom,$stype,$usymb)=@_;
1718: my $cid=$ENV{'request.course.id'};
1719: if ($cid) {
1720: my $now=time;
1721: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1722: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1723: $ENV{'course.'.$cid.'.num'}.
1724: ':nohist_expirationdates:'.
1725: &escape($key).'='.$now,
1726: $ENV{'course.'.$cid.'.home'})
1727: }
1728: return 'ok';
1729: }
1730:
1731: # ----------------------------------------------------- Devalidate Spreadsheets
1732:
1733: sub devalidate {
1734: my ($symb,$uname,$udom)=@_;
1735: my $cid=$ENV{'request.course.id'};
1736: if ($cid) {
1737: # delete the stored spreadsheets for
1738: # - the student level sheet of this user in course's homespace
1739: # - the assessment level sheet for this resource
1740: # for this user in user's homespace
1741: my $key=$uname.':'.$udom.':';
1742: my $status=
1743: &del('nohist_calculatedsheets',
1744: [$key.'studentcalc:'],
1745: $ENV{'course.'.$cid.'.domain'},
1746: $ENV{'course.'.$cid.'.num'})
1747: .' '.
1748: &del('nohist_calculatedsheets_'.$cid,
1749: [$key.'assesscalc:'.$symb],$udom,$uname);
1750: unless ($status eq 'ok ok') {
1751: &logthis('Could not devalidate spreadsheet '.
1752: $uname.' at '.$udom.' for '.
1753: $symb.': '.$status);
1754: }
1755: }
1756: }
1757:
1758: sub get_scalar {
1759: my ($string,$end) = @_;
1760: my $value;
1761: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1762: $value = $1;
1763: } elsif ($$string =~ s/^([^&]*?)&//) {
1764: $value = $1;
1765: }
1766: return &unescape($value);
1767: }
1768:
1769: sub array2str {
1770: my (@array) = @_;
1771: my $result=&arrayref2str(\@array);
1772: $result=~s/^__ARRAY_REF__//;
1773: $result=~s/__END_ARRAY_REF__$//;
1774: return $result;
1775: }
1776:
1777: sub arrayref2str {
1778: my ($arrayref) = @_;
1779: my $result='__ARRAY_REF__';
1780: foreach my $elem (@$arrayref) {
1781: if(ref($elem) eq 'ARRAY') {
1782: $result.=&arrayref2str($elem).'&';
1783: } elsif(ref($elem) eq 'HASH') {
1784: $result.=&hashref2str($elem).'&';
1785: } elsif(ref($elem)) {
1786: #print("Got a ref of ".(ref($elem))." skipping.");
1787: } else {
1788: $result.=&escape($elem).'&';
1789: }
1790: }
1791: $result=~s/\&$//;
1792: $result .= '__END_ARRAY_REF__';
1793: return $result;
1794: }
1795:
1796: sub hash2str {
1797: my (%hash) = @_;
1798: my $result=&hashref2str(\%hash);
1799: $result=~s/^__HASH_REF__//;
1800: $result=~s/__END_HASH_REF__$//;
1801: return $result;
1802: }
1803:
1804: sub hashref2str {
1805: my ($hashref)=@_;
1806: my $result='__HASH_REF__';
1807: foreach (keys(%$hashref)) {
1808: if (ref($_) eq 'ARRAY') {
1809: $result.=&arrayref2str($_).'=';
1810: } elsif (ref($_) eq 'HASH') {
1811: $result.=&hashref2str($_).'=';
1812: } elsif (ref($_)) {
1813: $result.='=';
1814: #print("Got a ref of ".(ref($_))." skipping.");
1815: } else {
1816: if ($_) {$result.=&escape($_).'=';} else { last; }
1817: }
1818:
1819: if(ref($hashref->{$_}) eq 'ARRAY') {
1820: $result.=&arrayref2str($hashref->{$_}).'&';
1821: } elsif(ref($hashref->{$_}) eq 'HASH') {
1822: $result.=&hashref2str($hashref->{$_}).'&';
1823: } elsif(ref($hashref->{$_})) {
1824: $result.='&';
1825: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1826: } else {
1827: $result.=&escape($hashref->{$_}).'&';
1828: }
1829: }
1830: $result=~s/\&$//;
1831: $result .= '__END_HASH_REF__';
1832: return $result;
1833: }
1834:
1835: sub str2hash {
1836: my ($string)=@_;
1837: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1838: return %$hash;
1839: }
1840:
1841: sub str2hashref {
1842: my ($string) = @_;
1843:
1844: my %hash;
1845:
1846: if($string !~ /^__HASH_REF__/) {
1847: if (! ($string eq '' || !defined($string))) {
1848: $hash{'error'}='Not hash reference';
1849: }
1850: return (\%hash, $string);
1851: }
1852:
1853: $string =~ s/^__HASH_REF__//;
1854:
1855: while($string !~ /^__END_HASH_REF__/) {
1856: #key
1857: my $key='';
1858: if($string =~ /^__HASH_REF__/) {
1859: ($key, $string)=&str2hashref($string);
1860: if(defined($key->{'error'})) {
1861: $hash{'error'}='Bad data';
1862: return (\%hash, $string);
1863: }
1864: } elsif($string =~ /^__ARRAY_REF__/) {
1865: ($key, $string)=&str2arrayref($string);
1866: if($key->[0] eq 'Array reference error') {
1867: $hash{'error'}='Bad data';
1868: return (\%hash, $string);
1869: }
1870: } else {
1871: $string =~ s/^(.*?)=//;
1872: $key=&unescape($1);
1873: }
1874: $string =~ s/^=//;
1875:
1876: #value
1877: my $value='';
1878: if($string =~ /^__HASH_REF__/) {
1879: ($value, $string)=&str2hashref($string);
1880: if(defined($value->{'error'})) {
1881: $hash{'error'}='Bad data';
1882: return (\%hash, $string);
1883: }
1884: } elsif($string =~ /^__ARRAY_REF__/) {
1885: ($value, $string)=&str2arrayref($string);
1886: if($value->[0] eq 'Array reference error') {
1887: $hash{'error'}='Bad data';
1888: return (\%hash, $string);
1889: }
1890: } else {
1891: $value=&get_scalar(\$string,'__END_HASH_REF__');
1892: }
1893: $string =~ s/^&//;
1894:
1895: $hash{$key}=$value;
1896: }
1897:
1898: $string =~ s/^__END_HASH_REF__//;
1899:
1900: return (\%hash, $string);
1901: }
1902:
1903: sub str2array {
1904: my ($string)=@_;
1905: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1906: return @$array;
1907: }
1908:
1909: sub str2arrayref {
1910: my ($string) = @_;
1911: my @array;
1912:
1913: if($string !~ /^__ARRAY_REF__/) {
1914: if (! ($string eq '' || !defined($string))) {
1915: $array[0]='Array reference error';
1916: }
1917: return (\@array, $string);
1918: }
1919:
1920: $string =~ s/^__ARRAY_REF__//;
1921:
1922: while($string !~ /^__END_ARRAY_REF__/) {
1923: my $value='';
1924: if($string =~ /^__HASH_REF__/) {
1925: ($value, $string)=&str2hashref($string);
1926: if(defined($value->{'error'})) {
1927: $array[0] ='Array reference error';
1928: return (\@array, $string);
1929: }
1930: } elsif($string =~ /^__ARRAY_REF__/) {
1931: ($value, $string)=&str2arrayref($string);
1932: if($value->[0] eq 'Array reference error') {
1933: $array[0] ='Array reference error';
1934: return (\@array, $string);
1935: }
1936: } else {
1937: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1938: }
1939: $string =~ s/^&//;
1940:
1941: push(@array, $value);
1942: }
1943:
1944: $string =~ s/^__END_ARRAY_REF__//;
1945:
1946: return (\@array, $string);
1947: }
1948:
1949: # -------------------------------------------------------------------Temp Store
1950:
1951: sub tmpreset {
1952: my ($symb,$namespace,$domain,$stuname) = @_;
1953: if (!$symb) {
1954: $symb=&symbread();
1955: if (!$symb) { $symb= $ENV{'request.url'}; }
1956: }
1957: $symb=escape($symb);
1958:
1959: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1960: $namespace=~s/\//\_/g;
1961: $namespace=~s/\W//g;
1962:
1963: #FIXME needs to do something for /pub resources
1964: if (!$domain) { $domain=$ENV{'user.domain'}; }
1965: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1966: my $path=$perlvar{'lonDaemons'}.'/tmp';
1967: my %hash;
1968: if (tie(%hash,'GDBM_File',
1969: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1970: &GDBM_WRCREAT(),0640)) {
1971: foreach my $key (keys %hash) {
1972: if ($key=~ /:$symb/) {
1973: delete($hash{$key});
1974: }
1975: }
1976: }
1977: }
1978:
1979: sub tmpstore {
1980: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1981:
1982: if (!$symb) {
1983: $symb=&symbread();
1984: if (!$symb) { $symb= $ENV{'request.url'}; }
1985: }
1986: $symb=escape($symb);
1987:
1988: if (!$namespace) {
1989: # I don't think we would ever want to store this for a course.
1990: # it seems this will only be used if we don't have a course.
1991: #$namespace=$ENV{'request.course.id'};
1992: #if (!$namespace) {
1993: $namespace=$ENV{'request.state'};
1994: #}
1995: }
1996: $namespace=~s/\//\_/g;
1997: $namespace=~s/\W//g;
1998: #FIXME needs to do something for /pub resources
1999: if (!$domain) { $domain=$ENV{'user.domain'}; }
2000: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2001: my $now=time;
2002: my %hash;
2003: my $path=$perlvar{'lonDaemons'}.'/tmp';
2004: if (tie(%hash,'GDBM_File',
2005: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2006: &GDBM_WRCREAT(),0640)) {
2007: $hash{"version:$symb"}++;
2008: my $version=$hash{"version:$symb"};
2009: my $allkeys='';
2010: foreach my $key (keys(%$storehash)) {
2011: $allkeys.=$key.':';
2012: $hash{"$version:$symb:$key"}=$$storehash{$key};
2013: }
2014: $hash{"$version:$symb:timestamp"}=$now;
2015: $allkeys.='timestamp';
2016: $hash{"$version:keys:$symb"}=$allkeys;
2017: if (untie(%hash)) {
2018: return 'ok';
2019: } else {
2020: return "error:$!";
2021: }
2022: } else {
2023: return "error:$!";
2024: }
2025: }
2026:
2027: # -----------------------------------------------------------------Temp Restore
2028:
2029: sub tmprestore {
2030: my ($symb,$namespace,$domain,$stuname) = @_;
2031:
2032: if (!$symb) {
2033: $symb=&symbread();
2034: if (!$symb) { $symb= $ENV{'request.url'}; }
2035: }
2036: $symb=escape($symb);
2037:
2038: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2039: #FIXME needs to do something for /pub resources
2040: if (!$domain) { $domain=$ENV{'user.domain'}; }
2041: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2042:
2043: my %returnhash;
2044: $namespace=~s/\//\_/g;
2045: $namespace=~s/\W//g;
2046: my %hash;
2047: my $path=$perlvar{'lonDaemons'}.'/tmp';
2048: if (tie(%hash,'GDBM_File',
2049: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2050: &GDBM_READER(),0640)) {
2051: my $version=$hash{"version:$symb"};
2052: $returnhash{'version'}=$version;
2053: my $scope;
2054: for ($scope=1;$scope<=$version;$scope++) {
2055: my $vkeys=$hash{"$scope:keys:$symb"};
2056: my @keys=split(/:/,$vkeys);
2057: my $key;
2058: $returnhash{"$scope:keys"}=$vkeys;
2059: foreach $key (@keys) {
2060: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
2061: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
2062: }
2063: }
2064: if (!(untie(%hash))) {
2065: return "error:$!";
2066: }
2067: } else {
2068: return "error:$!";
2069: }
2070: return %returnhash;
2071: }
2072:
2073: # ----------------------------------------------------------------------- Store
2074:
2075: sub store {
2076: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2077: my $home='';
2078:
2079: if ($stuname) { $home=&homeserver($stuname,$domain); }
2080:
2081: $symb=&symbclean($symb);
2082: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2083:
2084: if (!$domain) { $domain=$ENV{'user.domain'}; }
2085: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2086:
2087: &devalidate($symb,$stuname,$domain);
2088:
2089: $symb=escape($symb);
2090: if (!$namespace) {
2091: unless ($namespace=$ENV{'request.course.id'}) {
2092: return '';
2093: }
2094: }
2095: if (!$home) { $home=$ENV{'user.home'}; }
2096:
2097: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2098: $$storehash{'host'}=$perlvar{'lonHostID'};
2099:
2100: my $namevalue='';
2101: foreach (keys %$storehash) {
2102: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2103: }
2104: $namevalue=~s/\&$//;
2105: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2106: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2107: }
2108:
2109: # -------------------------------------------------------------- Critical Store
2110:
2111: sub cstore {
2112: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2113: my $home='';
2114:
2115: if ($stuname) { $home=&homeserver($stuname,$domain); }
2116:
2117: $symb=&symbclean($symb);
2118: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2119:
2120: if (!$domain) { $domain=$ENV{'user.domain'}; }
2121: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2122:
2123: &devalidate($symb,$stuname,$domain);
2124:
2125: $symb=escape($symb);
2126: if (!$namespace) {
2127: unless ($namespace=$ENV{'request.course.id'}) {
2128: return '';
2129: }
2130: }
2131: if (!$home) { $home=$ENV{'user.home'}; }
2132:
2133: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2134: $$storehash{'host'}=$perlvar{'lonHostID'};
2135:
2136: my $namevalue='';
2137: foreach (keys %$storehash) {
2138: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2139: }
2140: $namevalue=~s/\&$//;
2141: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2142: return critical
2143: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2144: }
2145:
2146: # --------------------------------------------------------------------- Restore
2147:
2148: sub restore {
2149: my ($symb,$namespace,$domain,$stuname) = @_;
2150: my $home='';
2151:
2152: if ($stuname) { $home=&homeserver($stuname,$domain); }
2153:
2154: if (!$symb) {
2155: unless ($symb=escape(&symbread())) { return ''; }
2156: } else {
2157: $symb=&escape(&symbclean($symb));
2158: }
2159: if (!$namespace) {
2160: unless ($namespace=$ENV{'request.course.id'}) {
2161: return '';
2162: }
2163: }
2164: if (!$domain) { $domain=$ENV{'user.domain'}; }
2165: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2166: if (!$home) { $home=$ENV{'user.home'}; }
2167: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2168:
2169: my %returnhash=();
2170: foreach (split(/\&/,$answer)) {
2171: my ($name,$value)=split(/\=/,$_);
2172: $returnhash{&unescape($name)}=&unescape($value);
2173: }
2174: my $version;
2175: for ($version=1;$version<=$returnhash{'version'};$version++) {
2176: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2177: $returnhash{$_}=$returnhash{$version.':'.$_};
2178: }
2179: }
2180: return %returnhash;
2181: }
2182:
2183: # ---------------------------------------------------------- Course Description
2184:
2185: sub coursedescription {
2186: my $courseid=shift;
2187: $courseid=~s/^\///;
2188: $courseid=~s/\_/\//g;
2189: my ($cdomain,$cnum)=split(/\//,$courseid);
2190: my $chome=&homeserver($cnum,$cdomain);
2191: my $normalid=$cdomain.'_'.$cnum;
2192: # need to always cache even if we get errors otherwise we keep
2193: # trying and trying and trying to get the course description.
2194: my %envhash=();
2195: my %returnhash=();
2196: $envhash{'course.'.$normalid.'.last_cache'}=time;
2197: if ($chome ne 'no_host') {
2198: %returnhash=&dump('environment',$cdomain,$cnum);
2199: if (!exists($returnhash{'con_lost'})) {
2200: $returnhash{'home'}= $chome;
2201: $returnhash{'domain'} = $cdomain;
2202: $returnhash{'num'} = $cnum;
2203: while (my ($name,$value) = each %returnhash) {
2204: $envhash{'course.'.$normalid.'.'.$name}=$value;
2205: }
2206: $returnhash{'url'}=&clutter($returnhash{'url'});
2207: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2208: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
2209: $envhash{'course.'.$normalid.'.home'}=$chome;
2210: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2211: $envhash{'course.'.$normalid.'.num'}=$cnum;
2212: }
2213: }
2214: &appenv(%envhash);
2215: return %returnhash;
2216: }
2217:
2218: # -------------------------------------------------See if a user is privileged
2219:
2220: sub privileged {
2221: my ($username,$domain)=@_;
2222: my $rolesdump=&reply("dump:$domain:$username:roles",
2223: &homeserver($username,$domain));
2224: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2225: my $now=time;
2226: if ($rolesdump ne '') {
2227: foreach (split(/&/,$rolesdump)) {
2228: if ($_!~/^rolesdef\&/) {
2229: my ($area,$role)=split(/=/,$_);
2230: $area=~s/\_\w\w$//;
2231: my ($trole,$tend,$tstart)=split(/_/,$role);
2232: if (($trole eq 'dc') || ($trole eq 'su')) {
2233: my $active=1;
2234: if ($tend) {
2235: if ($tend<$now) { $active=0; }
2236: }
2237: if ($tstart) {
2238: if ($tstart>$now) { $active=0; }
2239: }
2240: if ($active) { return 1; }
2241: }
2242: }
2243: }
2244: }
2245: return 0;
2246: }
2247:
2248: # -------------------------------------------------------- Get user privileges
2249:
2250: sub rolesinit {
2251: my ($domain,$username,$authhost)=@_;
2252: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2253: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2254: my %allroles=();
2255: my %thesepriv=();
2256: my $now=time;
2257: my $userroles="user.login.time=$now\n";
2258: my $thesestr;
2259:
2260: if ($rolesdump ne '') {
2261: foreach (split(/&/,$rolesdump)) {
2262: if ($_!~/^rolesdef\&/) {
2263: my ($area,$role)=split(/=/,$_);
2264: $area=~s/\_\w\w$//;
2265: my ($trole,$tend,$tstart)=split(/_/,$role);
2266: $userroles.='user.role.'.$trole.'.'.$area.'='.
2267: $tstart.'.'.$tend."\n";
2268: # log the associated role with the area
2269: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2270: if ($tend!=0) {
2271: if ($tend<$now) {
2272: $trole='';
2273: }
2274: }
2275: if ($tstart!=0) {
2276: if ($tstart>$now) {
2277: $trole='';
2278: }
2279: }
2280: if (($area ne '') && ($trole ne '')) {
2281: my $spec=$trole.'.'.$area;
2282: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2283: if ($trole =~ /^cr\//) {
2284: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2285: my $homsvr=homeserver($rauthor,$rdomain);
2286: if ($hostname{$homsvr} ne '') {
2287: my ($rdummy,$roledef)=
2288: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2289:
2290: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2291: my ($syspriv,$dompriv,$coursepriv)=
2292: split(/\_/,$roledef);
2293: if (defined($syspriv)) {
2294: $allroles{'cm./'}.=':'.$syspriv;
2295: $allroles{$spec.'./'}.=':'.$syspriv;
2296: }
2297: if ($tdomain ne '') {
2298: if (defined($dompriv)) {
2299: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2300: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2301: }
2302: if ($trest ne '') {
2303: if (defined($coursepriv)) {
2304: $allroles{'cm.'.$area}.=':'.$coursepriv;
2305: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
2306: }
2307: }
2308: }
2309: }
2310: }
2311: } else {
2312: if (defined($pr{$trole.':s'})) {
2313: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
2314: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2315: }
2316: if ($tdomain ne '') {
2317: if (defined($pr{$trole.':d'})) {
2318: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2319: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2320: }
2321: if ($trest ne '') {
2322: if (defined($pr{$trole.':c'})) {
2323: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2324: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2325: }
2326: }
2327: }
2328: }
2329: }
2330: }
2331: }
2332: my $adv=0;
2333: my $author=0;
2334: foreach (keys %allroles) {
2335: %thesepriv=();
2336: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
2337: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2338: foreach (split(/:/,$allroles{$_})) {
2339: if ($_ ne '') {
2340: my ($privilege,$restrictions)=split(/&/,$_);
2341: if ($restrictions eq '') {
2342: $thesepriv{$privilege}='F';
2343: } else {
2344: if ($thesepriv{$privilege} ne 'F') {
2345: $thesepriv{$privilege}.=$restrictions;
2346: }
2347: }
2348: }
2349: }
2350: $thesestr='';
2351: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2352: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
2353: }
2354: $userroles.='user.adv='.$adv."\n".
2355: 'user.author='.$author."\n";
2356: $ENV{'user.adv'}=$adv;
2357: }
2358: return $userroles;
2359: }
2360:
2361: # --------------------------------------------------------------- get interface
2362:
2363: sub get {
2364: my ($namespace,$storearr,$udomain,$uname)=@_;
2365: my $items='';
2366: foreach (@$storearr) {
2367: $items.=escape($_).'&';
2368: }
2369: $items=~s/\&$//;
2370: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2371: if (!$uname) { $uname=$ENV{'user.name'}; }
2372: my $uhome=&homeserver($uname,$udomain);
2373:
2374: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2375: my @pairs=split(/\&/,$rep);
2376: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2377: return @pairs;
2378: }
2379: my %returnhash=();
2380: my $i=0;
2381: foreach (@$storearr) {
2382: $returnhash{$_}=unescape($pairs[$i]);
2383: $i++;
2384: }
2385: return %returnhash;
2386: }
2387:
2388: # --------------------------------------------------------------- del interface
2389:
2390: sub del {
2391: my ($namespace,$storearr,$udomain,$uname)=@_;
2392: my $items='';
2393: foreach (@$storearr) {
2394: $items.=escape($_).'&';
2395: }
2396: $items=~s/\&$//;
2397: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2398: if (!$uname) { $uname=$ENV{'user.name'}; }
2399: my $uhome=&homeserver($uname,$udomain);
2400:
2401: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2402: }
2403:
2404: # -------------------------------------------------------------- dump interface
2405:
2406: sub dump {
2407: my ($namespace,$udomain,$uname,$regexp)=@_;
2408: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2409: if (!$uname) { $uname=$ENV{'user.name'}; }
2410: my $uhome=&homeserver($uname,$udomain);
2411: if ($regexp) {
2412: $regexp=&escape($regexp);
2413: } else {
2414: $regexp='.';
2415: }
2416: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2417: my @pairs=split(/\&/,$rep);
2418: my %returnhash=();
2419: foreach (@pairs) {
2420: my ($key,$value)=split(/=/,$_);
2421: $returnhash{unescape($key)}=unescape($value);
2422: }
2423: return %returnhash;
2424: }
2425:
2426: # -------------------------------------------------------------- keys interface
2427:
2428: sub getkeys {
2429: my ($namespace,$udomain,$uname)=@_;
2430: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2431: if (!$uname) { $uname=$ENV{'user.name'}; }
2432: my $uhome=&homeserver($uname,$udomain);
2433: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2434: my @keyarray=();
2435: foreach (split(/\&/,$rep)) {
2436: push (@keyarray,&unescape($_));
2437: }
2438: return @keyarray;
2439: }
2440:
2441: # --------------------------------------------------------------- currentdump
2442: sub currentdump {
2443: my ($courseid,$sdom,$sname)=@_;
2444: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2445: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2446: $sname = $ENV{'user.name'} if (! defined($sname));
2447: my $uhome = &homeserver($sname,$sdom);
2448: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2449: return if ($rep =~ /^(error:|no_such_host)/);
2450: #
2451: my %returnhash=();
2452: #
2453: if ($rep eq "unknown_cmd") {
2454: # an old lond will not know currentdump
2455: # Do a dump and make it look like a currentdump
2456: my @tmp = &dump($courseid,$sdom,$sname,'.');
2457: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2458: my %hash = @tmp;
2459: @tmp=();
2460: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2461: } else {
2462: my @pairs=split(/\&/,$rep);
2463: foreach (@pairs) {
2464: my ($key,$value)=split(/=/,$_);
2465: my ($symb,$param) = split(/:/,$key);
2466: $returnhash{&unescape($symb)}->{&unescape($param)} =
2467: &unescape($value);
2468: }
2469: }
2470: return %returnhash;
2471: }
2472:
2473: sub convert_dump_to_currentdump{
2474: my %hash = %{shift()};
2475: my %returnhash;
2476: # Code ripped from lond, essentially. The only difference
2477: # here is the unescaping done by lonnet::dump(). Conceivably
2478: # we might run in to problems with parameter names =~ /^v\./
2479: while (my ($key,$value) = each(%hash)) {
2480: my ($v,$symb,$param) = split(/:/,$key);
2481: next if ($v eq 'version' || $symb eq 'keys');
2482: next if (exists($returnhash{$symb}) &&
2483: exists($returnhash{$symb}->{$param}) &&
2484: $returnhash{$symb}->{'v.'.$param} > $v);
2485: $returnhash{$symb}->{$param}=$value;
2486: $returnhash{$symb}->{'v.'.$param}=$v;
2487: }
2488: #
2489: # Remove all of the keys in the hashes which keep track of
2490: # the version of the parameter.
2491: while (my ($symb,$param_hash) = each(%returnhash)) {
2492: # use a foreach because we are going to delete from the hash.
2493: foreach my $key (keys(%$param_hash)) {
2494: delete($param_hash->{$key}) if ($key =~ /^v\./);
2495: }
2496: }
2497: return \%returnhash;
2498: }
2499:
2500: # --------------------------------------------------------------- inc interface
2501:
2502: sub inc {
2503: my ($namespace,$store,$udomain,$uname) = @_;
2504: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2505: if (!$uname) { $uname=$ENV{'user.name'}; }
2506: my $uhome=&homeserver($uname,$udomain);
2507: my $items='';
2508: if (! ref($store)) {
2509: # got a single value, so use that instead
2510: $items = &escape($store).'=&';
2511: } elsif (ref($store) eq 'SCALAR') {
2512: $items = &escape($$store).'=&';
2513: } elsif (ref($store) eq 'ARRAY') {
2514: $items = join('=&',map {&escape($_);} @{$store});
2515: } elsif (ref($store) eq 'HASH') {
2516: while (my($key,$value) = each(%{$store})) {
2517: $items.= &escape($key).'='.&escape($value).'&';
2518: }
2519: }
2520: $items=~s/\&$//;
2521: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2522: }
2523:
2524: # --------------------------------------------------------------- put interface
2525:
2526: sub put {
2527: my ($namespace,$storehash,$udomain,$uname)=@_;
2528: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2529: if (!$uname) { $uname=$ENV{'user.name'}; }
2530: my $uhome=&homeserver($uname,$udomain);
2531: my $items='';
2532: foreach (keys %$storehash) {
2533: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
2534: }
2535: $items=~s/\&$//;
2536: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2537: }
2538:
2539: # ------------------------------------------------------ critical put interface
2540:
2541: sub cput {
2542: my ($namespace,$storehash,$udomain,$uname)=@_;
2543: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2544: if (!$uname) { $uname=$ENV{'user.name'}; }
2545: my $uhome=&homeserver($uname,$udomain);
2546: my $items='';
2547: foreach (keys %$storehash) {
2548: $items.=escape($_).'='.escape($$storehash{$_}).'&';
2549: }
2550: $items=~s/\&$//;
2551: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2552: }
2553:
2554: # -------------------------------------------------------------- eget interface
2555:
2556: sub eget {
2557: my ($namespace,$storearr,$udomain,$uname)=@_;
2558: my $items='';
2559: foreach (@$storearr) {
2560: $items.=escape($_).'&';
2561: }
2562: $items=~s/\&$//;
2563: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2564: if (!$uname) { $uname=$ENV{'user.name'}; }
2565: my $uhome=&homeserver($uname,$udomain);
2566: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2567: my @pairs=split(/\&/,$rep);
2568: my %returnhash=();
2569: my $i=0;
2570: foreach (@$storearr) {
2571: $returnhash{$_}=unescape($pairs[$i]);
2572: $i++;
2573: }
2574: return %returnhash;
2575: }
2576:
2577: # ---------------------------------------------- Custom access rule evaluation
2578:
2579: sub customaccess {
2580: my ($priv,$uri)=@_;
2581: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2582: $urealm=~s/^\W//;
2583: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2584: my $access=0;
2585: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2586: my ($effect,$realm,$role)=split(/\:/,$_);
2587: if ($role) {
2588: if ($role ne $urole) { next; }
2589: }
2590: foreach (split(/\s*\,\s*/,$realm)) {
2591: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2592: if ($tdom) {
2593: if ($tdom ne $udom) { next; }
2594: }
2595: if ($tcrs) {
2596: if ($tcrs ne $ucrs) { next; }
2597: }
2598: if ($tsec) {
2599: if ($tsec ne $usec) { next; }
2600: }
2601: $access=($effect eq 'allow');
2602: last;
2603: }
2604: if ($realm eq '' && $role eq '') {
2605: $access=($effect eq 'allow');
2606: }
2607: }
2608: return $access;
2609: }
2610:
2611: # ------------------------------------------------- Check for a user privilege
2612:
2613: sub allowed {
2614: my ($priv,$uri)=@_;
2615: $uri=&deversion($uri);
2616: my $orguri=$uri;
2617: $uri=&declutter($uri);
2618:
2619: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
2620: # Free bre access to adm and meta resources
2621:
2622: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2623: return 'F';
2624: }
2625:
2626: # Free bre to public access
2627:
2628: if ($priv eq 'bre') {
2629: my $copyright=&metadata($uri,'copyright');
2630: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2631: return 'F';
2632: }
2633: if ($copyright eq 'priv') {
2634: $uri=~/([^\/]+)\/([^\/]+)\//;
2635: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2636: return '';
2637: }
2638: }
2639: if ($copyright eq 'domain') {
2640: $uri=~/([^\/]+)\/([^\/]+)\//;
2641: unless (($ENV{'user.domain'} eq $1) ||
2642: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2643: return '';
2644: }
2645: }
2646: if ($ENV{'request.role'}=~ /li\.\//) {
2647: # Library role, so allow browsing of resources in this domain.
2648: return 'F';
2649: }
2650: if ($copyright eq 'custom') {
2651: unless (&customaccess($priv,$uri)) { return ''; }
2652: }
2653: }
2654: # Domain coordinator is trying to create a course
2655: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2656: # uri is the requested domain in this case.
2657: # comparison to 'request.role.domain' shows if the user has selected
2658: # a role of dc for the domain in question.
2659: return 'F' if ($uri eq $ENV{'request.role.domain'});
2660: }
2661:
2662: my $thisallowed='';
2663: my $statecond=0;
2664: my $courseprivid='';
2665:
2666: # Course
2667:
2668: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
2669: $thisallowed.=$1;
2670: }
2671:
2672: # Domain
2673:
2674: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2675: =~/\Q$priv\E\&([^\:]*)/) {
2676: $thisallowed.=$1;
2677: }
2678:
2679: # Course: uri itself is a course
2680: my $courseuri=$uri;
2681: $courseuri=~s/\_(\d)/\/$1/;
2682: $courseuri=~s/^([^\/])/\/$1/;
2683:
2684: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2685: =~/\Q$priv\E\&([^\:]*)/) {
2686: $thisallowed.=$1;
2687: }
2688:
2689: # URI is an uploaded document for this course
2690:
2691: if (($priv eq 'bre') &&
2692: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2693: return 'F';
2694: }
2695: # Full access at system, domain or course-wide level? Exit.
2696:
2697: if ($thisallowed=~/F/) {
2698: return 'F';
2699: }
2700:
2701: # If this is generating or modifying users, exit with special codes
2702:
2703: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:\Q$priv\E\:/) {
2704: return $thisallowed;
2705: }
2706: #
2707: # Gathered so far: system, domain and course wide privileges
2708: #
2709: # Course: See if uri or referer is an individual resource that is part of
2710: # the course
2711:
2712: if ($ENV{'request.course.id'}) {
2713:
2714: $courseprivid=$ENV{'request.course.id'};
2715: if ($ENV{'request.course.sec'}) {
2716: $courseprivid.='/'.$ENV{'request.course.sec'};
2717: }
2718: $courseprivid=~s/\_/\//;
2719: my $checkreferer=1;
2720: my ($match,$cond)=&is_on_map($uri);
2721: if ($match) {
2722: $statecond=$cond;
2723: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2724: =~/\Q$priv\E\&([^\:]*)/) {
2725: $thisallowed.=$1;
2726: $checkreferer=0;
2727: }
2728: }
2729:
2730: if ($checkreferer) {
2731: my $refuri=$ENV{'httpref.'.$orguri};
2732: unless ($refuri) {
2733: foreach (keys %ENV) {
2734: if ($_=~/^httpref\..*\*/) {
2735: my $pattern=$_;
2736: $pattern=~s/^httpref\.\/res\///;
2737: $pattern=~s/\*/\[\^\/\]\+/g;
2738: $pattern=~s/\//\\\//g;
2739: if ($orguri=~/$pattern/) {
2740: $refuri=$ENV{$_};
2741: }
2742: }
2743: }
2744: }
2745:
2746: if ($refuri) {
2747: $refuri=&declutter($refuri);
2748: my ($match,$cond)=&is_on_map($refuri);
2749: if ($match) {
2750: my $refstatecond=$cond;
2751: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2752: =~/\Q$priv\E\&([^\:]*)/) {
2753: $thisallowed.=$1;
2754: $uri=$refuri;
2755: $statecond=$refstatecond;
2756: }
2757: }
2758: }
2759: }
2760: }
2761:
2762: #
2763: # Gathered now: all privileges that could apply, and condition number
2764: #
2765: #
2766: # Full or no access?
2767: #
2768:
2769: if ($thisallowed=~/F/) {
2770: return 'F';
2771: }
2772:
2773: unless ($thisallowed) {
2774: return '';
2775: }
2776:
2777: # Restrictions exist, deal with them
2778: #
2779: # C:according to course preferences
2780: # R:according to resource settings
2781: # L:unless locked
2782: # X:according to user session state
2783: #
2784:
2785: # Possibly locked functionality, check all courses
2786: # Locks might take effect only after 10 minutes cache expiration for other
2787: # courses, and 2 minutes for current course
2788:
2789: my $envkey;
2790: if ($thisallowed=~/L/) {
2791: foreach $envkey (keys %ENV) {
2792: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2793: my $courseid=$2;
2794: my $roleid=$1.'.'.$2;
2795: $courseid=~s/^\///;
2796: my $expiretime=600;
2797: if ($ENV{'request.role'} eq $roleid) {
2798: $expiretime=120;
2799: }
2800: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2801: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2802: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2803: &coursedescription($courseid);
2804: }
2805: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
2806: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2807: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2808: &log($ENV{'user.domain'},$ENV{'user.name'},
2809: $ENV{'user.home'},
2810: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2811: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2812: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2813: return '';
2814: }
2815: }
2816: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
2817: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2818: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2819: &log($ENV{'user.domain'},$ENV{'user.name'},
2820: $ENV{'user.home'},
2821: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2822: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2823: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2824: return '';
2825: }
2826: }
2827: }
2828: }
2829: }
2830:
2831: #
2832: # Rest of the restrictions depend on selected course
2833: #
2834:
2835: unless ($ENV{'request.course.id'}) {
2836: return '1';
2837: }
2838:
2839: #
2840: # Now user is definitely in a course
2841: #
2842:
2843:
2844: # Course preferences
2845:
2846: if ($thisallowed=~/C/) {
2847: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2848: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2849: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2850: =~/\Q$rolecode\E/) {
2851: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2852: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2853: $ENV{'request.course.id'});
2854: return '';
2855: }
2856:
2857: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2858: =~/\Q$unamedom\E/) {
2859: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2860: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2861: $ENV{'request.course.id'});
2862: return '';
2863: }
2864: }
2865:
2866: # Resource preferences
2867:
2868: if ($thisallowed=~/R/) {
2869: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2870: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
2871: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2872: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2873: return '';
2874: }
2875: }
2876:
2877: # Restricted by state or randomout?
2878:
2879: if ($thisallowed=~/X/) {
2880: if ($ENV{'acc.randomout'}) {
2881: my $symb=&symbread($uri,1);
2882: if (($symb) && ($ENV{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
2883: return '';
2884: }
2885: }
2886: if (&condval($statecond)) {
2887: return '2';
2888: } else {
2889: return '';
2890: }
2891: }
2892:
2893: return 'F';
2894: }
2895:
2896: # --------------------------------------------------- Is a resource on the map?
2897:
2898: sub is_on_map {
2899: my $uri=&declutter(shift);
2900: $uri=~s/\.\d+\.(\w+)$/\.$1/;
2901: my @uriparts=split(/\//,$uri);
2902: my $filename=$uriparts[$#uriparts];
2903: my $pathname=$uri;
2904: $pathname=~s|/\Q$filename\E$||;
2905: $pathname=~s/^adm\/wrapper\///;
2906: #Trying to find the conditional for the file
2907: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2908: /\&\Q$filename\E\:([\d\|]+)\&/);
2909: if ($match) {
2910: return (1,$1);
2911: } else {
2912: return (0,0);
2913: }
2914: }
2915:
2916: # --------------------------------------------------------- Get symb from alias
2917:
2918: sub get_symb_from_alias {
2919: my $symb=shift;
2920: my ($map,$resid,$url)=&decode_symb($symb);
2921: # Already is a symb
2922: if ($url) { return $symb; }
2923: # Must be an alias
2924: my $aliassymb='';
2925: my %bighash;
2926: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2927: &GDBM_READER(),0640)) {
2928: my $rid=$bighash{'mapalias_'.$symb};
2929: if ($rid) {
2930: my ($mapid,$resid)=split(/\./,$rid);
2931: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
2932: $resid,$bighash{'src_'.$rid});
2933: }
2934: untie %bighash;
2935: }
2936: return $aliassymb;
2937: }
2938:
2939: # ----------------------------------------------------------------- Define Role
2940:
2941: sub definerole {
2942: if (allowed('mcr','/')) {
2943: my ($rolename,$sysrole,$domrole,$courole)=@_;
2944: foreach (split(':',$sysrole)) {
2945: my ($crole,$cqual)=split(/\&/,$_);
2946: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
2947: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
2948: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
2949: return "refused:s:$crole&$cqual";
2950: }
2951: }
2952: }
2953: foreach (split(':',$domrole)) {
2954: my ($crole,$cqual)=split(/\&/,$_);
2955: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
2956: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
2957: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
2958: return "refused:d:$crole&$cqual";
2959: }
2960: }
2961: }
2962: foreach (split(':',$courole)) {
2963: my ($crole,$cqual)=split(/\&/,$_);
2964: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
2965: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
2966: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
2967: return "refused:c:$crole&$cqual";
2968: }
2969: }
2970: }
2971: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2972: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2973: "rolesdef_$rolename=".
2974: escape($sysrole.'_'.$domrole.'_'.$courole);
2975: return reply($command,$ENV{'user.home'});
2976: } else {
2977: return 'refused';
2978: }
2979: }
2980:
2981: # ---------------- Make a metadata query against the network of library servers
2982:
2983: sub metadata_query {
2984: my ($query,$custom,$customshow,$server_array)=@_;
2985: my %rhash;
2986: my @server_list = (defined($server_array) ? @$server_array
2987: : keys(%libserv) );
2988: for my $server (@server_list) {
2989: unless ($custom or $customshow) {
2990: my $reply=&reply("querysend:".&escape($query),$server);
2991: $rhash{$server}=$reply;
2992: }
2993: else {
2994: my $reply=&reply("querysend:".&escape($query).':'.
2995: &escape($custom).':'.&escape($customshow),
2996: $server);
2997: $rhash{$server}=$reply;
2998: }
2999: }
3000: return \%rhash;
3001: }
3002:
3003: # ----------------------------------------- Send log queries and wait for reply
3004:
3005: sub log_query {
3006: my ($uname,$udom,$query,%filters)=@_;
3007: my $uhome=&homeserver($uname,$udom);
3008: if ($uhome eq 'no_host') { return 'error: no_host'; }
3009: my $uhost=$hostname{$uhome};
3010: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3011: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3012: $uhome);
3013: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3014: return get_query_reply($queryid);
3015: }
3016:
3017: sub get_query_reply {
3018: my $queryid=shift;
3019: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3020: my $reply='';
3021: for (1..100) {
3022: sleep 2;
3023: if (-e $replyfile.'.end') {
3024: if (open(my $fh,$replyfile)) {
3025: $reply.=<$fh>;
3026: close($fh);
3027: } else { return 'error: reply_file_error'; }
3028: return &unescape($reply);
3029: }
3030: }
3031: return 'timeout:'.$queryid;
3032: }
3033:
3034: sub courselog_query {
3035: #
3036: # possible filters:
3037: # url: url or symb
3038: # username
3039: # domain
3040: # action: view, submit, grade
3041: # start: timestamp
3042: # end: timestamp
3043: #
3044: my (%filters)=@_;
3045: unless ($ENV{'request.course.id'}) { return 'no_course'; }
3046: if ($filters{'url'}) {
3047: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3048: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3049: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3050: }
3051: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
3052: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
3053: return &log_query($cname,$cdom,'courselog',%filters);
3054: }
3055:
3056: sub userlog_query {
3057: my ($uname,$udom,%filters)=@_;
3058: return &log_query($uname,$udom,'userlog',%filters);
3059: }
3060:
3061: # ------------------------------------------------------------------ Plain Text
3062:
3063: sub plaintext {
3064: my $short=shift;
3065: return &mt($prp{$short});
3066: }
3067:
3068: # ----------------------------------------------------------------- Assign Role
3069:
3070: sub assignrole {
3071: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3072: my $mrole;
3073: if ($role =~ /^cr\//) {
3074: my $cwosec=$url;
3075: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3076: unless (&allowed('ccr',$cwosec)) {
3077: &logthis('Refused custom assignrole: '.
3078: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3079: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3080: return 'refused';
3081: }
3082: $mrole='cr';
3083: } else {
3084: my $cwosec=$url;
3085: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3086: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3087: &logthis('Refused assignrole: '.
3088: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3089: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3090: return 'refused';
3091: }
3092: $mrole=$role;
3093: }
3094: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3095: "$udom:$uname:$url".'_'."$mrole=$role";
3096: if ($end) { $command.='_'.$end; }
3097: if ($start) {
3098: if ($end) {
3099: $command.='_'.$start;
3100: } else {
3101: $command.='_0_'.$start;
3102: }
3103: }
3104: # actually delete
3105: if ($deleteflag) {
3106: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3107: # modify command to delete the role
3108: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
3109: "$udom:$uname:$url".'_'."$mrole";
3110: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
3111: # set start and finish to negative values for userrolelog
3112: $start=-1;
3113: $end=-1;
3114: }
3115: }
3116: # send command
3117: my $answer=&reply($command,&homeserver($uname,$udom));
3118: # log new user role if status is ok
3119: if ($answer eq 'ok') {
3120: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
3121: }
3122: return $answer;
3123: }
3124:
3125: # -------------------------------------------------- Modify user authentication
3126: # Overrides without validation
3127:
3128: sub modifyuserauth {
3129: my ($udom,$uname,$umode,$upass)=@_;
3130: my $uhome=&homeserver($uname,$udom);
3131: unless (&allowed('mau',$udom)) { return 'refused'; }
3132: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3133: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3134: ' in domain '.$ENV{'request.role.domain'});
3135: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3136: &escape($upass),$uhome);
3137: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
3138: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3139: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3140: &log($udom,,$uname,$uhome,
3141: 'Authentication changed by '.$ENV{'user.domain'}.', '.
3142: $ENV{'user.name'}.', '.$umode.
3143: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3144: unless ($reply eq 'ok') {
3145: &logthis('Authentication mode error: '.$reply);
3146: return 'error: '.$reply;
3147: }
3148: return 'ok';
3149: }
3150:
3151: # --------------------------------------------------------------- Modify a user
3152:
3153: sub modifyuser {
3154: my ($udom, $uname, $uid,
3155: $umode, $upass, $first,
3156: $middle, $last, $gene,
3157: $forceid, $desiredhome, $email)=@_;
3158: $udom=~s/\W//g;
3159: $uname=~s/\W//g;
3160: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3161: $umode.', '.$first.', '.$middle.', '.
3162: $last.', '.$gene.'(forceid: '.$forceid.')'.
3163: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3164: ' desiredhome not specified').
3165: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3166: ' in domain '.$ENV{'request.role.domain'});
3167: my $uhome=&homeserver($uname,$udom,'true');
3168: # ----------------------------------------------------------------- Create User
3169: if (($uhome eq 'no_host') &&
3170: (($umode && $upass) || ($umode eq 'localauth'))) {
3171: my $unhome='';
3172: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3173: $unhome = $desiredhome;
3174: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
3175: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
3176: } else { # load balancing routine for determining $unhome
3177: my $tryserver;
3178: my $loadm=10000000;
3179: foreach $tryserver (keys %libserv) {
3180: if ($hostdom{$tryserver} eq $udom) {
3181: my $answer=reply('load',$tryserver);
3182: if (($answer=~/\d+/) && ($answer<$loadm)) {
3183: $loadm=$answer;
3184: $unhome=$tryserver;
3185: }
3186: }
3187: }
3188: }
3189: if (($unhome eq '') || ($unhome eq 'no_host')) {
3190: return 'error: unable to find a home server for '.$uname.
3191: ' in domain '.$udom;
3192: }
3193: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3194: &escape($upass),$unhome);
3195: unless ($reply eq 'ok') {
3196: return 'error: '.$reply;
3197: }
3198: $uhome=&homeserver($uname,$udom,'true');
3199: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3200: return 'error: unable verify users home machine.';
3201: }
3202: } # End of creation of new user
3203: # ---------------------------------------------------------------------- Add ID
3204: if ($uid) {
3205: $uid=~tr/A-Z/a-z/;
3206: my %uidhash=&idrget($udom,$uname);
3207: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3208: && (!$forceid)) {
3209: unless ($uid eq $uidhash{$uname}) {
3210: return 'error: user id "'.$uid.'" does not match '.
3211: 'current user id "'.$uidhash{$uname}.'".';
3212: }
3213: } else {
3214: &idput($udom,($uname => $uid));
3215: }
3216: }
3217: # -------------------------------------------------------------- Add names, etc
3218: my @tmp=&get('environment',
3219: ['firstname','middlename','lastname','generation'],
3220: $udom,$uname);
3221: my %names;
3222: if ($tmp[0] =~ m/^error:.*/) {
3223: %names=();
3224: } else {
3225: %names = @tmp;
3226: }
3227: #
3228: # Make sure to not trash student environment if instructor does not bother
3229: # to supply name and email information
3230: #
3231: if ($first) { $names{'firstname'} = $first; }
3232: if (defined($middle)) { $names{'middlename'} = $middle; }
3233: if ($last) { $names{'lastname'} = $last; }
3234: if (defined($gene)) { $names{'generation'} = $gene; }
3235: if ($email) { $names{'notification'} = $email;
3236: $names{'critnotification'} = $email; }
3237:
3238: my $reply = &put('environment', \%names, $udom,$uname);
3239: if ($reply ne 'ok') { return 'error: '.$reply; }
3240: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
3241: $umode.', '.$first.', '.$middle.', '.
3242: $last.', '.$gene.' by '.
3243: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3244: return 'ok';
3245: }
3246:
3247: # -------------------------------------------------------------- Modify student
3248:
3249: sub modifystudent {
3250: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3251: $end,$start,$forceid,$desiredhome,$email,$type,$cid)=@_;
3252: if (!$cid) {
3253: unless ($cid=$ENV{'request.course.id'}) {
3254: return 'not_in_class';
3255: }
3256: }
3257: # --------------------------------------------------------------- Make the user
3258: my $reply=&modifyuser
3259: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
3260: $desiredhome,$email);
3261: unless ($reply eq 'ok') { return $reply; }
3262: # This will cause &modify_student_enrollment to get the uid from the
3263: # students environment
3264: $uid = undef if (!$forceid);
3265: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
3266: $gene,$usec,$end,$start,$type,$cid);
3267: return $reply;
3268: }
3269:
3270: sub modify_student_enrollment {
3271: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,
3272: $cid) = @_;
3273: my ($cdom,$cnum,$chome);
3274: if (!$cid) {
3275: unless ($cid=$ENV{'request.course.id'}) {
3276: return 'not_in_class';
3277: }
3278: $cdom=$ENV{'course.'.$cid.'.domain'};
3279: $cnum=$ENV{'course.'.$cid.'.num'};
3280: } else {
3281: ($cdom,$cnum)=split(/_/,$cid);
3282: }
3283: $chome=$ENV{'course.'.$cid.'.home'};
3284: if (!$chome) {
3285: $chome=&homeserver($cnum,$cdom);
3286: }
3287: if (!$chome) { return 'unknown_course'; }
3288: # Make sure the user exists
3289: my $uhome=&homeserver($uname,$udom);
3290: if (($uhome eq '') || ($uhome eq 'no_host')) {
3291: return 'error: no such user';
3292: }
3293: # Get student data if we were not given enough information
3294: if (!defined($first) || $first eq '' ||
3295: !defined($last) || $last eq '' ||
3296: !defined($uid) || $uid eq '' ||
3297: !defined($middle) || $middle eq '' ||
3298: !defined($gene) || $gene eq '') {
3299: # They did not supply us with enough data to enroll the student, so
3300: # we need to pick up more information.
3301: my %tmp = &get('environment',
3302: ['firstname','middlename','lastname', 'generation','id']
3303: ,$udom,$uname);
3304:
3305: #foreach (keys(%tmp)) {
3306: # &logthis("key $_ = ".$tmp{$_});
3307: #}
3308: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3309: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3310: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3311: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3312: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3313: }
3314: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
3315: $first,$middle);
3316: my $reply=cput('classlist',
3317: {"$uname:$udom" =>
3318: join(':',$end,$start,$uid,$usec,$fullname,$type) },
3319: $cdom,$cnum);
3320: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3321: return 'error: '.$reply;
3322: }
3323: # Add student role to user
3324: my $uurl='/'.$cid;
3325: $uurl=~s/\_/\//g;
3326: if ($usec) {
3327: $uurl.='/'.$usec;
3328: }
3329: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3330: }
3331:
3332: # ------------------------------------------------- Write to course preferences
3333:
3334: sub writecoursepref {
3335: my ($courseid,%prefs)=@_;
3336: $courseid=~s/^\///;
3337: $courseid=~s/\_/\//g;
3338: my ($cdomain,$cnum)=split(/\//,$courseid);
3339: my $chome=homeserver($cnum,$cdomain);
3340: if (($chome eq '') || ($chome eq 'no_host')) {
3341: return 'error: no such course';
3342: }
3343: my $cstring='';
3344: foreach (keys %prefs) {
3345: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3346: }
3347: $cstring=~s/\&$//;
3348: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3349: }
3350:
3351: # ---------------------------------------------------------- Make/modify course
3352:
3353: sub createcourse {
3354: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
3355: $url=&declutter($url);
3356: my $cid='';
3357: unless (&allowed('ccc',$udom)) {
3358: return 'refused';
3359: }
3360: # ------------------------------------------------------------------- Create ID
3361: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3362: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3363: # ----------------------------------------------- Make sure that does not exist
3364: my $uhome=&homeserver($uname,$udom,'true');
3365: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3366: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3367: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3368: $uhome=&homeserver($uname,$udom,'true');
3369: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3370: return 'error: unable to generate unique course-ID';
3371: }
3372: }
3373: # ------------------------------------------------ Check supplied server name
3374: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3375: if (! exists($libserv{$course_server})) {
3376: return 'error:bad server name '.$course_server;
3377: }
3378: # ------------------------------------------------------------- Make the course
3379: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3380: $course_server);
3381: unless ($reply eq 'ok') { return 'error: '.$reply; }
3382: $uhome=&homeserver($uname,$udom,'true');
3383: if (($uhome eq '') || ($uhome eq 'no_host')) {
3384: return 'error: no such course';
3385: }
3386: # ----------------------------------------------------------------- Course made
3387: # log existance
3388: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description),
3389: $uhome);
3390: &flushcourselogs();
3391: # set toplevel url
3392: my $topurl=$url;
3393: unless ($nonstandard) {
3394: # ------------------------------------------ For standard courses, make top url
3395: my $mapurl=&clutter($url);
3396: if ($mapurl eq '/res/') { $mapurl=''; }
3397: $ENV{'form.initmap'}=(<<ENDINITMAP);
3398: <map>
3399: <resource id="1" type="start"></resource>
3400: <resource id="2" src="$mapurl"></resource>
3401: <resource id="3" type="finish"></resource>
3402: <link index="1" from="1" to="2"></link>
3403: <link index="2" from="2" to="3"></link>
3404: </map>
3405: ENDINITMAP
3406: $topurl=&declutter(
3407: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3408: );
3409: }
3410: # ----------------------------------------------------------- Write preferences
3411: &writecoursepref($udom.'_'.$uname,
3412: ('description' => $description,
3413: 'url' => $topurl));
3414: return '/'.$udom.'/'.$uname;
3415: }
3416:
3417: # ---------------------------------------------------------- Assign Custom Role
3418:
3419: sub assigncustomrole {
3420: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3421: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3422: $end,$start,$deleteflag);
3423: }
3424:
3425: # ----------------------------------------------------------------- Revoke Role
3426:
3427: sub revokerole {
3428: my ($udom,$uname,$url,$role,$deleteflag)=@_;
3429: my $now=time;
3430: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
3431: }
3432:
3433: # ---------------------------------------------------------- Revoke Custom Role
3434:
3435: sub revokecustomrole {
3436: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
3437: my $now=time;
3438: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3439: $deleteflag);
3440: }
3441:
3442: # ------------------------------------------------------------ Directory lister
3443:
3444: sub dirlist {
3445: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3446:
3447: $uri=~s/^\///;
3448: $uri=~s/\/$//;
3449: my ($udom, $uname);
3450: (undef,$udom,$uname)=split(/\//,$uri);
3451: if(defined($userdomain)) {
3452: $udom = $userdomain;
3453: }
3454: if(defined($username)) {
3455: $uname = $username;
3456: }
3457:
3458: my $dirRoot = $perlvar{'lonDocRoot'};
3459: if(defined($alternateDirectoryRoot)) {
3460: $dirRoot = $alternateDirectoryRoot;
3461: $dirRoot =~ s/\/$//;
3462: }
3463:
3464: if($udom) {
3465: if($uname) {
3466: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
3467: homeserver($uname,$udom));
3468: return split(/:/,$listing);
3469: } elsif(!defined($alternateDirectoryRoot)) {
3470: my $tryserver;
3471: my %allusers=();
3472: foreach $tryserver (keys %libserv) {
3473: if($hostdom{$tryserver} eq $udom) {
3474: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3475: $udom, $tryserver);
3476: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
3477: && ($listing ne 'con_lost')) {
3478: foreach (split(/:/,$listing)) {
3479: my ($entry,@stat)=split(/&/,$_);
3480: $allusers{$entry}=1;
3481: }
3482: }
3483: }
3484: }
3485: my $alluserstr='';
3486: foreach (sort keys %allusers) {
3487: $alluserstr.=$_.'&user:';
3488: }
3489: $alluserstr=~s/:$//;
3490: return split(/:/,$alluserstr);
3491: } else {
3492: my @emptyResults = ();
3493: push(@emptyResults, 'missing user name');
3494: return split(':',@emptyResults);
3495: }
3496: } elsif(!defined($alternateDirectoryRoot)) {
3497: my $tryserver;
3498: my %alldom=();
3499: foreach $tryserver (keys %libserv) {
3500: $alldom{$hostdom{$tryserver}}=1;
3501: }
3502: my $alldomstr='';
3503: foreach (sort keys %alldom) {
3504: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
3505: }
3506: $alldomstr=~s/:$//;
3507: return split(/:/,$alldomstr);
3508: } else {
3509: my @emptyResults = ();
3510: push(@emptyResults, 'missing domain');
3511: return split(':',@emptyResults);
3512: }
3513: }
3514:
3515: # --------------------------------------------- GetFileTimestamp
3516: # This function utilizes dirlist and returns the date stamp for
3517: # when it was last modified. It will also return an error of -1
3518: # if an error occurs
3519:
3520: ##
3521: ## FIXME: This subroutine assumes its caller knows something about the
3522: ## directory structure of the home server for the student ($root).
3523: ## Not a good assumption to make. Since this is for looking up files
3524: ## in user directories, the full path should be constructed by lond, not
3525: ## whatever machine we request data from.
3526: ##
3527: sub GetFileTimestamp {
3528: my ($studentDomain,$studentName,$filename,$root)=@_;
3529: $studentDomain=~s/\W//g;
3530: $studentName=~s/\W//g;
3531: my $subdir=$studentName.'__';
3532: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3533: my $proname="$studentDomain/$subdir/$studentName";
3534: $proname .= '/'.$filename;
3535: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
3536: $studentName, $root);
3537: my @stats = split('&', $fileStat);
3538: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
3539: # @stats contains first the filename, then the stat output
3540: return $stats[10]; # so this is 10 instead of 9.
3541: } else {
3542: return -1;
3543: }
3544: }
3545:
3546: # -------------------------------------------------------- Value of a Condition
3547:
3548: sub directcondval {
3549: my $number=shift;
3550: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
3551: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
3552: } else {
3553: return 2;
3554: }
3555: }
3556:
3557: sub condval {
3558: my $condidx=shift;
3559: my $result=0;
3560: my $allpathcond='';
3561: foreach (split(/\|/,$condidx)) {
3562: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
3563: $allpathcond.=
3564: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
3565: }
3566: }
3567: $allpathcond=~s/\|$//;
3568: if ($ENV{'request.course.id'}) {
3569: if ($allpathcond) {
3570: my $operand='|';
3571: my @stack;
3572: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
3573: if ($_ eq '(') {
3574: push @stack,($operand,$result)
3575: } elsif ($_ eq ')') {
3576: my $before=pop @stack;
3577: if (pop @stack eq '&') {
3578: $result=$result>$before?$before:$result;
3579: } else {
3580: $result=$result>$before?$result:$before;
3581: }
3582: } elsif (($_ eq '&') || ($_ eq '|')) {
3583: $operand=$_;
3584: } else {
3585: my $new=directcondval($_);
3586: if ($operand eq '&') {
3587: $result=$result>$new?$new:$result;
3588: } else {
3589: $result=$result>$new?$result:$new;
3590: }
3591: }
3592: }
3593: }
3594: }
3595: return $result;
3596: }
3597:
3598: # ---------------------------------------------------- Devalidate courseresdata
3599:
3600: sub devalidatecourseresdata {
3601: my ($coursenum,$coursedomain)=@_;
3602: my $hashid=$coursenum.':'.$coursedomain;
3603: &devalidate_cache(\%courseresdatacache,$hashid,'courseres');
3604: }
3605:
3606: # --------------------------------------------------- Course Resourcedata Query
3607:
3608: sub courseresdata {
3609: my ($coursenum,$coursedomain,@which)=@_;
3610: my $coursehom=&homeserver($coursenum,$coursedomain);
3611: my $hashid=$coursenum.':'.$coursedomain;
3612: my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid,'courseres');
3613: unless (defined($cached)) {
3614: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
3615: $result=\%dumpreply;
3616: my ($tmp) = keys(%dumpreply);
3617: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
3618: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
3619: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3620: return $tmp;
3621: } elsif ($tmp =~ /^(error)/) {
3622: $result=undef;
3623: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
3624: }
3625: }
3626: foreach my $item (@which) {
3627: if (defined($result->{$item})) {
3628: return $result->{$item};
3629: }
3630: }
3631: return undef;
3632: }
3633:
3634: #
3635: # EXT resource caching routines
3636: #
3637:
3638: sub clear_EXT_cache_status {
3639: &delenv('cache.EXT.');
3640: }
3641:
3642: sub EXT_cache_status {
3643: my ($target_domain,$target_user) = @_;
3644: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3645: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
3646: # We know already the user has no data
3647: return 1;
3648: } else {
3649: return 0;
3650: }
3651: }
3652:
3653: sub EXT_cache_set {
3654: my ($target_domain,$target_user) = @_;
3655: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3656: &appenv($cachename => time);
3657: }
3658:
3659: # --------------------------------------------------------- Value of a Variable
3660: sub EXT {
3661: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
3662:
3663: unless ($varname) { return ''; }
3664: #get real user name/domain, courseid and symb
3665: my $courseid;
3666: my $publicuser;
3667: if ($symbparm) {
3668: $symbparm=&get_symb_from_alias($symbparm);
3669: }
3670: if (!($uname && $udom)) {
3671: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
3672: &Apache::lonxml::whichuser($symbparm);
3673: if (!$symbparm) { $symbparm=$cursymb; }
3674: } else {
3675: $courseid=$ENV{'request.course.id'};
3676: }
3677: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
3678: my $rest;
3679: if (defined($therest[0])) {
3680: $rest=join('.',@therest);
3681: } else {
3682: $rest='';
3683: }
3684:
3685: my $qualifierrest=$qualifier;
3686: if ($rest) { $qualifierrest.='.'.$rest; }
3687: my $spacequalifierrest=$space;
3688: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
3689: if ($realm eq 'user') {
3690: # --------------------------------------------------------------- user.resource
3691: if ($space eq 'resource') {
3692: if (defined($Apache::lonhomework::parsing_a_problem)) {
3693: return $Apache::lonhomework::history{$qualifierrest};
3694: } else {
3695: my %restored;
3696: if ($publicuser || $ENV{'request.state'} eq 'construct') {
3697: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
3698: } else {
3699: %restored=&restore($symbparm,$courseid,$udom,$uname);
3700: }
3701: return $restored{$qualifierrest};
3702: }
3703: # ----------------------------------------------------------------- user.access
3704: } elsif ($space eq 'access') {
3705: # FIXME - not supporting calls for a specific user
3706: return &allowed($qualifier,$rest);
3707: # ------------------------------------------ user.preferences, user.environment
3708: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
3709: if (($uname eq $ENV{'user.name'}) &&
3710: ($udom eq $ENV{'user.domain'})) {
3711: return $ENV{join('.',('environment',$qualifierrest))};
3712: } else {
3713: my %returnhash;
3714: if (!$publicuser) {
3715: %returnhash=&userenvironment($udom,$uname,
3716: $qualifierrest);
3717: }
3718: return $returnhash{$qualifierrest};
3719: }
3720: # ----------------------------------------------------------------- user.course
3721: } elsif ($space eq 'course') {
3722: # FIXME - not supporting calls for a specific user
3723: return $ENV{join('.',('request.course',$qualifier))};
3724: # ------------------------------------------------------------------- user.role
3725: } elsif ($space eq 'role') {
3726: # FIXME - not supporting calls for a specific user
3727: my ($role,$where)=split(/\./,$ENV{'request.role'});
3728: if ($qualifier eq 'value') {
3729: return $role;
3730: } elsif ($qualifier eq 'extent') {
3731: return $where;
3732: }
3733: # ----------------------------------------------------------------- user.domain
3734: } elsif ($space eq 'domain') {
3735: return $udom;
3736: # ------------------------------------------------------------------- user.name
3737: } elsif ($space eq 'name') {
3738: return $uname;
3739: # ---------------------------------------------------- Any other user namespace
3740: } else {
3741: my %reply;
3742: if (!$publicuser) {
3743: %reply=&get($space,[$qualifierrest],$udom,$uname);
3744: }
3745: return $reply{$qualifierrest};
3746: }
3747: } elsif ($realm eq 'query') {
3748: # ---------------------------------------------- pull stuff out of query string
3749: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
3750: [$spacequalifierrest]);
3751: return $ENV{'form.'.$spacequalifierrest};
3752: } elsif ($realm eq 'request') {
3753: # ------------------------------------------------------------- request.browser
3754: if ($space eq 'browser') {
3755: if ($qualifier eq 'textremote') {
3756: if (&mt('textual_remote_display') eq 'on') {
3757: return 1;
3758: } else {
3759: return 0;
3760: }
3761: } else {
3762: return $ENV{'browser.'.$qualifier};
3763: }
3764: # ------------------------------------------------------------ request.filename
3765: } else {
3766: return $ENV{'request.'.$spacequalifierrest};
3767: }
3768: } elsif ($realm eq 'course') {
3769: # ---------------------------------------------------------- course.description
3770: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
3771: } elsif ($realm eq 'resource') {
3772:
3773: my $section;
3774: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
3775:
3776: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
3777:
3778: # ----------------------------------------------------- Cascading lookup scheme
3779: if (!$symbparm) { $symbparm=&symbread(); }
3780: my $symbp=$symbparm;
3781: my $mapp=(&decode_symb($symbp))[0];
3782:
3783: my $symbparm=$symbp.'.'.$spacequalifierrest;
3784: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3785:
3786: if (($ENV{'user.name'} eq $uname) &&
3787: ($ENV{'user.domain'} eq $udom)) {
3788: $section=$ENV{'request.course.sec'};
3789: } else {
3790: if (! defined($usection)) {
3791: $section=&usection($udom,$uname,$courseid);
3792: } else {
3793: $section = $usection;
3794: }
3795: }
3796:
3797: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3798: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3799: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3800:
3801: my $courselevel=$courseid.'.'.$spacequalifierrest;
3802: my $courselevelr=$courseid.'.'.$symbparm;
3803: my $courselevelm=$courseid.'.'.$mapparm;
3804:
3805: # ----------------------------------------------------------- first, check user
3806: #most student don\'t have any data set, check if there is some data
3807: if (! &EXT_cache_status($udom,$uname)) {
3808: my $hashid="$udom:$uname";
3809: my ($result,$cached)=&is_cached(\%userresdatacache,$hashid,
3810: 'userres');
3811: if (!defined($cached)) {
3812: my %resourcedata=&dump('resourcedata',$udom,$uname);
3813: $result=\%resourcedata;
3814: &do_cache(\%userresdatacache,$hashid,$result,'userres');
3815: }
3816: my ($tmp)=keys(%$result);
3817: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
3818: if ($$result{$courselevelr}) {
3819: return $$result{$courselevelr}; }
3820: if ($$result{$courselevelm}) {
3821: return $$result{$courselevelm}; }
3822: if ($$result{$courselevel}) {
3823: return $$result{$courselevel}; }
3824: } else {
3825: #error 2 occurs when the .db doesn't exist
3826: if ($tmp!~/error: 2 /) {
3827: &logthis("<font color=blue>WARNING:".
3828: " Trying to get resource data for ".
3829: $uname." at ".$udom.": ".
3830: $tmp."</font>");
3831: } elsif ($tmp=~/error: 2 /) {
3832: &EXT_cache_set($udom,$uname);
3833: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3834: return $tmp;
3835: }
3836: }
3837: }
3838:
3839: # -------------------------------------------------------- second, check course
3840:
3841: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3842: $ENV{'course.'.$courseid.'.domain'},
3843: ($seclevelr,$seclevelm,$seclevel,
3844: $courselevelr,$courselevelm,
3845: $courselevel));
3846: if (defined($coursereply)) { return $coursereply; }
3847:
3848: # ------------------------------------------------------ third, check map parms
3849: my %parmhash=();
3850: my $thisparm='';
3851: if (tie(%parmhash,'GDBM_File',
3852: $ENV{'request.course.fn'}.'_parms.db',
3853: &GDBM_READER(),0640)) {
3854: $thisparm=$parmhash{$symbparm};
3855: untie(%parmhash);
3856: }
3857: if ($thisparm) { return $thisparm; }
3858: }
3859: # --------------------------------------------- last, look in resource metadata
3860:
3861: $spacequalifierrest=~s/\./\_/;
3862: my $filename;
3863: if (!$symbparm) { $symbparm=&symbread(); }
3864: if ($symbparm) {
3865: $filename=(&decode_symb($symbparm))[2];
3866: } else {
3867: $filename=$ENV{'request.filename'};
3868: }
3869: my $metadata=&metadata($filename,$spacequalifierrest);
3870: if (defined($metadata)) { return $metadata; }
3871: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
3872: if (defined($metadata)) { return $metadata; }
3873:
3874: # ------------------------------------------------------------------ Cascade up
3875: unless ($space eq '0') {
3876: my @parts=split(/_/,$space);
3877: my $id=pop(@parts);
3878: my $part=join('_',@parts);
3879: if ($part eq '') { $part='0'; }
3880: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
3881: $symbparm,$udom,$uname,$section,1);
3882: if (defined($partgeneral)) { return $partgeneral; }
3883: }
3884: if ($recurse) { return undef; }
3885: my $pack_def=&packages_tab_default($filename,$varname);
3886: if (defined($pack_def)) { return $pack_def; }
3887:
3888: # ---------------------------------------------------- Any other user namespace
3889: } elsif ($realm eq 'environment') {
3890: # ----------------------------------------------------------------- environment
3891: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3892: return $ENV{'environment.'.$spacequalifierrest};
3893: } else {
3894: my %returnhash=&userenvironment($udom,$uname,
3895: $spacequalifierrest);
3896: return $returnhash{$spacequalifierrest};
3897: }
3898: } elsif ($realm eq 'system') {
3899: # ----------------------------------------------------------------- system.time
3900: if ($space eq 'time') {
3901: return time;
3902: }
3903: }
3904: return '';
3905: }
3906:
3907: sub packages_tab_default {
3908: my ($uri,$varname)=@_;
3909: my (undef,$part,$name)=split(/\./,$varname);
3910: my $packages=&metadata($uri,'packages');
3911: foreach my $package (split(/,/,$packages)) {
3912: my ($pack_type,$pack_part)=split(/_/,$package,2);
3913: if (defined($packagetab{"$pack_type&$name&default"})) {
3914: return $packagetab{"$pack_type&$name&default"};
3915: }
3916: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
3917: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
3918: }
3919: }
3920: return undef;
3921: }
3922:
3923: sub add_prefix_and_part {
3924: my ($prefix,$part)=@_;
3925: my $keyroot;
3926: if (defined($prefix) && $prefix !~ /^__/) {
3927: # prefix that has a part already
3928: $keyroot=$prefix;
3929: } elsif (defined($prefix)) {
3930: # prefix that is missing a part
3931: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3932: } else {
3933: # no prefix at all
3934: if (defined($part)) { $keyroot='_'.$part; }
3935: }
3936: return $keyroot;
3937: }
3938:
3939: # ---------------------------------------------------------------- Get metadata
3940:
3941: sub metadata {
3942: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3943: $uri=&declutter($uri);
3944: # if it is a non metadata possible uri return quickly
3945: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3946: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
3947: ($uri =~ m|home/[^/]+/public_html/|)) {
3948: return undef;
3949: }
3950: my $filename=$uri;
3951: $uri=~s/\.meta$//;
3952: #
3953: # Is the metadata already cached?
3954: # Look at timestamp of caching
3955: # Everything is cached by the main uri, libraries are never directly cached
3956: #
3957: if (!defined($liburi)) {
3958: my ($result,$cached)=&is_cached(\%metacache,$uri,'meta');
3959: if (defined($cached)) { return $result->{':'.$what}; }
3960: }
3961: {
3962: #
3963: # Is this a recursive call for a library?
3964: #
3965: if (! exists($metacache{$uri})) {
3966: $metacache{$uri}={};
3967: }
3968: if ($liburi) {
3969: $liburi=&declutter($liburi);
3970: $filename=$liburi;
3971: } else {
3972: &devalidate_cache(\%metacache,$uri,'meta');
3973: }
3974: my %metathesekeys=();
3975: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3976: my $metastring;
3977: if ($uri !~ m|^uploaded/|) {
3978: $metastring=&getfile(&filelocation('',&clutter($filename)));
3979: }
3980: my $parser=HTML::LCParser->new(\$metastring);
3981: my $token;
3982: undef %metathesekeys;
3983: while ($token=$parser->get_token) {
3984: if ($token->[0] eq 'S') {
3985: if (defined($token->[2]->{'package'})) {
3986: #
3987: # This is a package - get package info
3988: #
3989: my $package=$token->[2]->{'package'};
3990: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3991: if (defined($token->[2]->{'id'})) {
3992: $keyroot.='_'.$token->[2]->{'id'};
3993: }
3994: if ($metacache{$uri}->{':packages'}) {
3995: $metacache{$uri}->{':packages'}.=','.$package.$keyroot;
3996: } else {
3997: $metacache{$uri}->{':packages'}=$package.$keyroot;
3998: }
3999: foreach (keys %packagetab) {
4000: my $part=$keyroot;
4001: $part=~s/^\_//;
4002: if ($_=~/^\Q$package\E\&/ ||
4003: $_=~/^\Q$package\E_0\&/) {
4004: my ($pack,$name,$subp)=split(/\&/,$_);
4005: # ignore package.tab specified default values
4006: # here &package_tab_default() will fetch those
4007: if ($subp eq 'default') { next; }
4008: my $value=$packagetab{$_};
4009: my $unikey;
4010: if ($pack =~ /_0$/) {
4011: $unikey='parameter_0_'.$name;
4012: $part=0;
4013: } else {
4014: $unikey='parameter'.$keyroot.'_'.$name;
4015: }
4016: if ($subp eq 'display') {
4017: $value.=' [Part: '.$part.']';
4018: }
4019: $metacache{$uri}->{':'.$unikey.'.part'}=$part;
4020: $metathesekeys{$unikey}=1;
4021: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4022: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
4023: }
4024: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4025: $metacache{$uri}->{':'.$unikey}=
4026: $metacache{$uri}->{':'.$unikey.'.default'};
4027: }
4028: }
4029: }
4030: } else {
4031: #
4032: # This is not a package - some other kind of start tag
4033: #
4034: my $entry=$token->[1];
4035: my $unikey;
4036: if ($entry eq 'import') {
4037: $unikey='';
4038: } else {
4039: $unikey=$entry;
4040: }
4041: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4042:
4043: if (defined($token->[2]->{'id'})) {
4044: $unikey.='_'.$token->[2]->{'id'};
4045: }
4046:
4047: if ($entry eq 'import') {
4048: #
4049: # Importing a library here
4050: #
4051: if ($depthcount<20) {
4052: my $location=$parser->get_text('/import');
4053: my $dir=$filename;
4054: $dir=~s|[^/]*$||;
4055: $location=&filelocation($dir,$location);
4056: foreach (sort(split(/\,/,&metadata($uri,'keys',
4057: $location,$unikey,
4058: $depthcount+1)))) {
4059: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
4060: $metathesekeys{$_}=1;
4061: }
4062: }
4063: } else {
4064:
4065: if (defined($token->[2]->{'name'})) {
4066: $unikey.='_'.$token->[2]->{'name'};
4067: }
4068: $metathesekeys{$unikey}=1;
4069: foreach (@{$token->[3]}) {
4070: $metacache{$uri}->{':'.$unikey.'.'.$_}=$token->[2]->{$_};
4071: }
4072: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
4073: my $default=$metacache{$uri}->{':'.$unikey.'.default'};
4074: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
4075: # only ws inside the tag, and not in default, so use default
4076: # as value
4077: $metacache{$uri}->{':'.$unikey}=$default;
4078: } else {
4079: # either something interesting inside the tag or default
4080: # uninteresting
4081: $metacache{$uri}->{':'.$unikey}=$internaltext;
4082: }
4083: # end of not-a-package not-a-library import
4084: }
4085: # end of not-a-package start tag
4086: }
4087: # the next is the end of "start tag"
4088: }
4089: }
4090: my ($extension) = ($uri =~ /\.(\w+)$/);
4091: foreach my $key (sort(keys(%packagetab))) {
4092: #&logthis("extsion1 $extension $key !!");
4093: #no specific packages #how's our extension
4094: if ($key!~/^extension_\Q$extension\E&/) { next; }
4095: &metadata_create_package_def($uri,$key,'extension_'.$extension,
4096: \%metathesekeys);
4097: }
4098: if (!exists($metacache{$uri}->{':packages'})) {
4099: foreach my $key (sort(keys(%packagetab))) {
4100: #no specific packages well let's get default then
4101: if ($key!~/^default&/) { next; }
4102: &metadata_create_package_def($uri,$key,'default',
4103: \%metathesekeys);
4104: }
4105: }
4106: # are there custom rights to evaluate
4107: if ($metacache{$uri}->{':copyright'} eq 'custom') {
4108:
4109: #
4110: # Importing a rights file here
4111: #
4112: unless ($depthcount) {
4113: my $location=$metacache{$uri}->{':customdistributionfile'};
4114: my $dir=$filename;
4115: $dir=~s|[^/]*$||;
4116: $location=&filelocation($dir,$location);
4117: foreach (sort(split(/\,/,&metadata($uri,'keys',
4118: $location,'_rights',
4119: $depthcount+1)))) {
4120: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
4121: $metathesekeys{$_}=1;
4122: }
4123: }
4124: }
4125: $metacache{$uri}->{':keys'}=join(',',keys %metathesekeys);
4126: &metadata_generate_part0(\%metathesekeys,$metacache{$uri},$uri);
4127: $metacache{$uri}->{':allpossiblekeys'}=join(',',keys %metathesekeys);
4128: &do_cache(\%metacache,$uri,$metacache{$uri},'meta');
4129: # this is the end of "was not already recently cached
4130: }
4131: return $metacache{$uri}->{':'.$what};
4132: }
4133:
4134: sub metadata_create_package_def {
4135: my ($uri,$key,$package,$metathesekeys)=@_;
4136: my ($pack,$name,$subp)=split(/\&/,$key);
4137: if ($subp eq 'default') { next; }
4138:
4139: if (defined($metacache{$uri}->{':packages'})) {
4140: $metacache{$uri}->{':packages'}.=','.$package;
4141: } else {
4142: $metacache{$uri}->{':packages'}=$package;
4143: }
4144: my $value=$packagetab{$key};
4145: my $unikey;
4146: $unikey='parameter_0_'.$name;
4147: $metacache{$uri}->{':'.$unikey.'.part'}=0;
4148: $$metathesekeys{$unikey}=1;
4149: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4150: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
4151: }
4152: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4153: $metacache{$uri}->{':'.$unikey}=
4154: $metacache{$uri}->{':'.$unikey.'.default'};
4155: }
4156: }
4157:
4158: sub metadata_generate_part0 {
4159: my ($metadata,$metacache,$uri) = @_;
4160: my %allnames;
4161: foreach my $metakey (sort keys %$metadata) {
4162: if ($metakey=~/^parameter\_(.*)/) {
4163: my $part=$$metacache{':'.$metakey.'.part'};
4164: my $name=$$metacache{':'.$metakey.'.name'};
4165: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
4166: $allnames{$name}=$part;
4167: }
4168: }
4169: }
4170: foreach my $name (keys(%allnames)) {
4171: $$metadata{"parameter_0_$name"}=1;
4172: my $key=":parameter_0_$name";
4173: $$metacache{"$key.part"}='0';
4174: $$metacache{"$key.name"}=$name;
4175: $$metacache{"$key.type"}=$$metacache{':parameter_'.
4176: $allnames{$name}.'_'.$name.
4177: '.type'};
4178: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
4179: '.display'};
4180: my $expr='\\[Part: '.$allnames{$name}.'\\]';
4181: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
4182: $$metacache{"$key.display"}=$olddis;
4183: }
4184: }
4185:
4186: # ------------------------------------------------- Get the title of a resource
4187:
4188: sub gettitle {
4189: my $urlsymb=shift;
4190: my $symb=&symbread($urlsymb);
4191: unless ($symb) {
4192: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
4193: return &metadata($urlsymb,'title');
4194: }
4195: my ($result,$cached)=&is_cached(\%titlecache,$symb,'title',600);
4196: if (defined($cached)) { return $result; }
4197: my ($map,$resid,$url)=&decode_symb($symb);
4198: my $title='';
4199: my %bighash;
4200: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4201: &GDBM_READER(),0640)) {
4202: my $mapid=$bighash{'map_pc_'.&clutter($map)};
4203: $title=$bighash{'title_'.$mapid.'.'.$resid};
4204: untie %bighash;
4205: }
4206: $title=~s/\&colon\;/\:/gs;
4207: if ($title) {
4208: return &do_cache(\%titlecache,$symb,$title,'title');
4209: } else {
4210: return &metadata($urlsymb,'title');
4211: }
4212: }
4213:
4214: # ------------------------------------------------- Update symbolic store links
4215:
4216: sub symblist {
4217: my ($mapname,%newhash)=@_;
4218: $mapname=&deversion(&declutter($mapname));
4219: my %hash;
4220: if (($ENV{'request.course.fn'}) && (%newhash)) {
4221: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4222: &GDBM_WRCREAT(),0640)) {
4223: foreach (keys %newhash) {
4224: $hash{declutter($_)}=$mapname.'___'.&deversion($newhash{$_});
4225: }
4226: if (untie(%hash)) {
4227: return 'ok';
4228: }
4229: }
4230: }
4231: return 'error';
4232: }
4233:
4234: # --------------------------------------------------------------- Verify a symb
4235:
4236: sub symbverify {
4237: my ($symb,$thisfn)=@_;
4238: $thisfn=&declutter($thisfn);
4239: # direct jump to resource in page or to a sequence - will construct own symbs
4240: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
4241: # check URL part
4242: my ($map,$resid,$url)=&decode_symb($symb);
4243:
4244: unless ($url eq $thisfn) { return 0; }
4245:
4246: $symb=&symbclean($symb);
4247: $thisfn=&deversion($thisfn);
4248:
4249: my %bighash;
4250: my $okay=0;
4251:
4252: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4253: &GDBM_READER(),0640)) {
4254: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4255: unless ($ids) {
4256: $ids=$bighash{'ids_/'.$thisfn};
4257: }
4258: if ($ids) {
4259: # ------------------------------------------------------------------- Has ID(s)
4260: foreach (split(/\,/,$ids)) {
4261: my ($mapid,$resid)=split(/\./,$_);
4262: if (
4263: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
4264: eq $symb) {
4265: $okay=1;
4266: }
4267: }
4268: }
4269: untie(%bighash);
4270: }
4271: return $okay;
4272: }
4273:
4274: # --------------------------------------------------------------- Clean-up symb
4275:
4276: sub symbclean {
4277: my $symb=shift;
4278:
4279: # remove version from map
4280: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
4281:
4282: # remove version from URL
4283: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
4284:
4285: return $symb;
4286: }
4287:
4288: # ---------------------------------------------- Split symb to find map and url
4289:
4290: sub encode_symb {
4291: my ($map,$resid,$url)=@_;
4292: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
4293: }
4294:
4295: sub decode_symb {
4296: my ($map,$resid,$url)=split(/\_\_\_/,shift);
4297: return (&fixversion($map),$resid,&fixversion($url));
4298: }
4299:
4300: sub fixversion {
4301: my $fn=shift;
4302: if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
4303: my %bighash;
4304: my $uri=&clutter($fn);
4305: my $key=$ENV{'request.course.id'}.'_'.$uri;
4306: # is this cached?
4307: my ($result,$cached)=&is_cached(\%courseresversioncache,$key,
4308: 'courseresversion',600);
4309: if (defined($cached)) { return $result; }
4310: # unfortunately not cached, or expired
4311: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4312: &GDBM_READER(),0640)) {
4313: if ($bighash{'version_'.$uri}) {
4314: my $version=$bighash{'version_'.$uri};
4315: unless (($version eq 'mostrecent') ||
4316: ($version==&getversion($uri))) {
4317: $uri=~s/\.(\w+)$/\.$version\.$1/;
4318: }
4319: }
4320: untie %bighash;
4321: }
4322: return &do_cache
4323: (\%courseresversioncache,$key,&declutter($uri),'courseresversion');
4324: }
4325:
4326: sub deversion {
4327: my $url=shift;
4328: $url=~s/\.\d+\.(\w+)$/\.$1/;
4329: return $url;
4330: }
4331:
4332: # ------------------------------------------------------ Return symb list entry
4333:
4334: sub symbread {
4335: my ($thisfn,$donotrecurse)=@_;
4336: # no filename provided? try from environment
4337: unless ($thisfn) {
4338: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
4339: $thisfn=$ENV{'request.filename'};
4340: }
4341: # is that filename actually a symb? Verify, clean, and return
4342: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
4343: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
4344: }
4345: $thisfn=declutter($thisfn);
4346: my %hash;
4347: my %bighash;
4348: my $syval='';
4349: if (($ENV{'request.course.fn'}) && ($thisfn)) {
4350: my $targetfn = $thisfn;
4351: if ( ($thisfn =~ m/^uploaded\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
4352: $targetfn = 'adm/wrapper/'.$thisfn;
4353: }
4354: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4355: &GDBM_READER(),0640)) {
4356: $syval=$hash{$targetfn};
4357: untie(%hash);
4358: }
4359: # ---------------------------------------------------------- There was an entry
4360: if ($syval) {
4361: unless ($syval=~/\_\d+$/) {
4362: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
4363: &appenv('request.ambiguous' => $thisfn);
4364: return '';
4365: }
4366: $syval.=$1;
4367: }
4368: } else {
4369: # ------------------------------------------------------- Was not in symb table
4370: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4371: &GDBM_READER(),0640)) {
4372: # ---------------------------------------------- Get ID(s) for current resource
4373: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4374: unless ($ids) {
4375: $ids=$bighash{'ids_/'.$thisfn};
4376: }
4377: unless ($ids) {
4378: # alias?
4379: $ids=$bighash{'mapalias_'.$thisfn};
4380: }
4381: if ($ids) {
4382: # ------------------------------------------------------------------- Has ID(s)
4383: my @possibilities=split(/\,/,$ids);
4384: if ($#possibilities==0) {
4385: # ----------------------------------------------- There is only one possibility
4386: my ($mapid,$resid)=split(/\./,$ids);
4387: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
4388: } elsif (!$donotrecurse) {
4389: # ------------------------------------------ There is more than one possibility
4390: my $realpossible=0;
4391: foreach (@possibilities) {
4392: my $file=$bighash{'src_'.$_};
4393: if (&allowed('bre',$file)) {
4394: my ($mapid,$resid)=split(/\./,$_);
4395: if ($bighash{'map_type_'.$mapid} ne 'page') {
4396: $realpossible++;
4397: $syval=declutter($bighash{'map_id_'.$mapid}).
4398: '___'.$resid;
4399: }
4400: }
4401: }
4402: if ($realpossible!=1) { $syval=''; }
4403: } else {
4404: $syval='';
4405: }
4406: }
4407: untie(%bighash)
4408: }
4409: }
4410: if ($syval) {
4411: return &symbclean($syval.'___'.$thisfn);
4412: }
4413: }
4414: &appenv('request.ambiguous' => $thisfn);
4415: return '';
4416: }
4417:
4418: # ---------------------------------------------------------- Return random seed
4419:
4420: sub numval {
4421: my $txt=shift;
4422: $txt=~tr/A-J/0-9/;
4423: $txt=~tr/a-j/0-9/;
4424: $txt=~tr/K-T/0-9/;
4425: $txt=~tr/k-t/0-9/;
4426: $txt=~tr/U-Z/0-5/;
4427: $txt=~tr/u-z/0-5/;
4428: $txt=~s/\D//g;
4429: return int($txt);
4430: }
4431:
4432: sub numval2 {
4433: my $txt=shift;
4434: $txt=~tr/A-J/0-9/;
4435: $txt=~tr/a-j/0-9/;
4436: $txt=~tr/K-T/0-9/;
4437: $txt=~tr/k-t/0-9/;
4438: $txt=~tr/U-Z/0-5/;
4439: $txt=~tr/u-z/0-5/;
4440: $txt=~s/\D//g;
4441: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
4442: my $total;
4443: foreach my $val (@txts) { $total+=$val; }
4444: return int($total);
4445: }
4446:
4447: sub latest_rnd_algorithm_id {
4448: return '64bit2';
4449: }
4450:
4451: sub getCODE {
4452: if (defined($ENV{'form.CODE'})) { return $ENV{'form.CODE'}; }
4453: if (defined($Apache::lonhomework::parsing_a_problem) &&
4454: defined($Apache::lonhomework::history{'resource.CODE'})) {
4455: return $Apache::lonhomework::history{'resource.CODE'};
4456: }
4457: return undef;
4458: }
4459:
4460: sub rndseed {
4461: my ($symb,$courseid,$domain,$username)=@_;
4462:
4463: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
4464: if (!$symb) {
4465: unless ($symb=$wsymb) { return time; }
4466: }
4467: if (!$courseid) { $courseid=$wcourseid; }
4468: if (!$domain) { $domain=$wdomain; }
4469: if (!$username) { $username=$wusername }
4470: my $which=$ENV{"course.$courseid.rndseed"};
4471: if (defined(&getCODE())) {
4472: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
4473: } elsif ($which eq '64bit2') {
4474: return &rndseed_64bit2($symb,$courseid,$domain,$username);
4475: } elsif ($which eq '64bit') {
4476: return &rndseed_64bit($symb,$courseid,$domain,$username);
4477: }
4478: return &rndseed_32bit($symb,$courseid,$domain,$username);
4479: }
4480:
4481: sub rndseed_32bit {
4482: my ($symb,$courseid,$domain,$username)=@_;
4483: {
4484: use integer;
4485: my $symbchck=unpack("%32C*",$symb) << 27;
4486: my $symbseed=numval($symb) << 22;
4487: my $namechck=unpack("%32C*",$username) << 17;
4488: my $nameseed=numval($username) << 12;
4489: my $domainseed=unpack("%32C*",$domain) << 7;
4490: my $courseseed=unpack("%32C*",$courseid);
4491: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
4492: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4493: #&Apache::lonxml::debug("rndseed :$num:$symb");
4494: return $num;
4495: }
4496: }
4497:
4498: sub rndseed_64bit {
4499: my ($symb,$courseid,$domain,$username)=@_;
4500: {
4501: use integer;
4502: my $symbchck=unpack("%32S*",$symb) << 21;
4503: my $symbseed=numval($symb) << 10;
4504: my $namechck=unpack("%32S*",$username);
4505:
4506: my $nameseed=numval($username) << 21;
4507: my $domainseed=unpack("%32S*",$domain) << 10;
4508: my $courseseed=unpack("%32S*",$courseid);
4509:
4510: my $num1=$symbchck+$symbseed+$namechck;
4511: my $num2=$nameseed+$domainseed+$courseseed;
4512: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4513: #&Apache::lonxml::debug("rndseed :$num:$symb");
4514: return "$num1,$num2";
4515: }
4516: }
4517:
4518: sub rndseed_64bit2 {
4519: my ($symb,$courseid,$domain,$username)=@_;
4520: {
4521: use integer;
4522: # strings need to be an even # of cahracters long, it it is odd the
4523: # last characters gets thrown away
4524: my $symbchck=unpack("%32S*",$symb.' ') << 21;
4525: my $symbseed=numval($symb) << 10;
4526: my $namechck=unpack("%32S*",$username.' ');
4527:
4528: my $nameseed=numval($username) << 21;
4529: my $domainseed=unpack("%32S*",$domain.' ') << 10;
4530: my $courseseed=unpack("%32S*",$courseid.' ');
4531:
4532: my $num1=$symbchck+$symbseed+$namechck;
4533: my $num2=$nameseed+$domainseed+$courseseed;
4534: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4535: #&Apache::lonxml::debug("rndseed :$num:$symb");
4536: return "$num1,$num2";
4537: }
4538: }
4539:
4540: sub rndseed_CODE_64bit {
4541: my ($symb,$courseid,$domain,$username)=@_;
4542: {
4543: use integer;
4544: my $symbchck=unpack("%32S*",$symb.' ') << 16;
4545: my $symbseed=numval2($symb);
4546: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
4547: my $CODEseed=numval(&getCODE());
4548: my $courseseed=unpack("%32S*",$courseid.' ');
4549: my $num1=$symbseed+$CODEchck;
4550: my $num2=$CODEseed+$courseseed+$symbchck;
4551: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
4552: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
4553: return "$num1,$num2";
4554: }
4555: }
4556:
4557: sub setup_random_from_rndseed {
4558: my ($rndseed)=@_;
4559: if ($rndseed =~/,/) {
4560: my ($num1,$num2)=split(/,/,$rndseed);
4561: &Math::Random::random_set_seed(abs($num1),abs($num2));
4562: } else {
4563: &Math::Random::random_set_seed_from_phrase($rndseed);
4564: }
4565: }
4566:
4567: sub latest_receipt_algorithm_id {
4568: return 'receipt2';
4569: }
4570:
4571: sub recunique {
4572: my $fucourseid=shift;
4573: my $unique;
4574: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
4575: $unique=$ENV{"course.$fucourseid.internal.encseed"};
4576: } else {
4577: $unique=$perlvar{'lonReceipt'};
4578: }
4579: return unpack("%32C*",$unique);
4580: }
4581:
4582: sub recprefix {
4583: my $fucourseid=shift;
4584: my $prefix;
4585: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
4586: $prefix=$ENV{"course.$fucourseid.internal.encpref"};
4587: } else {
4588: $prefix=$perlvar{'lonHostID'};
4589: }
4590: return unpack("%32C*",$prefix);
4591: }
4592:
4593: sub ireceipt {
4594: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
4595: my $cuname=unpack("%32C*",$funame);
4596: my $cudom=unpack("%32C*",$fudom);
4597: my $cucourseid=unpack("%32C*",$fucourseid);
4598: my $cusymb=unpack("%32C*",$fusymb);
4599: my $cunique=&recunique($fucourseid);
4600: my $cpart=unpack("%32S*",$part);
4601: my $return =&recprefix($fucourseid).'-';
4602: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
4603: $ENV{'request.state'} eq 'construct') {
4604: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
4605: " and ".($cpart%$cudom));
4606:
4607: $return.= ($cunique%$cuname+
4608: $cunique%$cudom+
4609: $cusymb%$cuname+
4610: $cusymb%$cudom+
4611: $cucourseid%$cuname+
4612: $cucourseid%$cudom+
4613: $cpart%$cuname+
4614: $cpart%$cudom);
4615: } else {
4616: $return.= ($cunique%$cuname+
4617: $cunique%$cudom+
4618: $cusymb%$cuname+
4619: $cusymb%$cudom+
4620: $cucourseid%$cuname+
4621: $cucourseid%$cudom);
4622: }
4623: return $return;
4624: }
4625:
4626: sub receipt {
4627: my ($part)=@_;
4628: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
4629: return &ireceipt($name,$domain,$courseid,$symb,$part);
4630: }
4631:
4632: # ------------------------------------------------------------ Serves up a file
4633: # returns either the contents of the file or
4634: # -1 if the file doesn't exist
4635: #
4636: # if the target is a file that was uploaded via DOCS,
4637: # a check will be made to see if a current copy exists on the local server,
4638: # if it does this will be served, otherwise a copy will be retrieved from
4639: # the home server for the course and stored in /home/httpd/html/userfiles on
4640: # the local server.
4641:
4642: sub getfile {
4643: my ($file,$caller) = @_;
4644:
4645: if ($file !~ m|^/*uploaded/(\w+)/(\w+)/(.+)$|) {
4646: # normal file from res space
4647: &repcopy($file);
4648: return &readfile($file);
4649: }
4650:
4651: my $info;
4652: my $cdom = $1;
4653: my $cnum = $2;
4654: my $filename = $3;
4655: my $path = $Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles';
4656: my ($lwpresp,$rtncode);
4657: my $localfile = $path.'/'.$cdom.'/'.$cnum.'/'.$filename;
4658: if (-e "$localfile") {
4659: my @fileinfo = stat($localfile);
4660: $lwpresp = &getuploaded('HEAD',$file,$cdom,$cnum,\$info,\$rtncode);
4661: if ($lwpresp ne 'ok') {
4662: if ($rtncode eq '404') {
4663: unlink($localfile);
4664: }
4665: return -1;
4666: }
4667: if ($info < $fileinfo[9]) {
4668: return &readfile($localfile);
4669: }
4670: $info = '';
4671: $lwpresp = &getuploaded('GET',$file,$cdom,$cnum,\$info,\$rtncode);
4672: if ($lwpresp ne 'ok') {
4673: return -1;
4674: }
4675: } else {
4676: $lwpresp = &getuploaded('GET',$file,$cdom,$cnum,\$info,\$rtncode);
4677: if ($lwpresp ne 'ok') {
4678: return -1;
4679: }
4680: my @parts = ($cdom,$cnum);
4681: if ($filename =~ m|^(.+)/[^/]+$|) {
4682: push @parts, split(/\//,$1);
4683: }
4684: foreach my $part (@parts) {
4685: $path .= '/'.$part;
4686: if (!-e $path) {
4687: mkdir($path,0770);
4688: }
4689: }
4690: }
4691: open (FILE,">$localfile");
4692: print FILE $info;
4693: close(FILE);
4694: if ($caller eq 'uploadrep') {
4695: return 'ok';
4696: }
4697: return $info;
4698: }
4699:
4700: sub getuploaded {
4701: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
4702: $uri=~s/^\///;
4703: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
4704: my $ua=new LWP::UserAgent;
4705: my $request=new HTTP::Request($reqtype,$uri);
4706: my $response=$ua->request($request);
4707: $$rtncode = $response->code;
4708: if (! $response->is_success()) {
4709: return 'failed';
4710: }
4711: if ($reqtype eq 'HEAD') {
4712: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
4713: } elsif ($reqtype eq 'GET') {
4714: $$info = $response->content;
4715: }
4716: return 'ok';
4717: }
4718:
4719: sub readfile {
4720: my $file = shift;
4721: if ( (! -e $file ) || ($file eq '') ) { return -1; };
4722: my $fh;
4723: open($fh,"<$file");
4724: my $a='';
4725: while (<$fh>) { $a .=$_; }
4726: return $a;
4727: }
4728:
4729: sub filelocation {
4730: my ($dir,$file) = @_;
4731: my $location;
4732: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
4733: if ($file=~m:^/~:) { # is a contruction space reference
4734: $location = $file;
4735: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
4736: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
4737: $location=$file;
4738: } else {
4739: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
4740: $file=~s:^/res/:/:;
4741: if ( !( $file =~ m:^/:) ) {
4742: $location = $dir. '/'.$file;
4743: } else {
4744: $location = '/home/httpd/html/res'.$file;
4745: }
4746: }
4747: $location=~s://+:/:g; # remove duplicate /
4748: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
4749: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
4750: return $location;
4751: }
4752:
4753: sub hreflocation {
4754: my ($dir,$file)=@_;
4755: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
4756: my $finalpath=filelocation($dir,$file);
4757: $finalpath=~s-^/home/httpd/html--;
4758: $finalpath=~s-^/home/(\w+)/public_html/-/~$1/-;
4759: return $finalpath;
4760: } elsif ($file=~m-^/home-) {
4761: $file=~s-^/home/httpd/html--;
4762: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
4763: return $file;
4764: }
4765: return $file;
4766: }
4767:
4768: sub current_machine_domains {
4769: my $hostname=$hostname{$perlvar{'lonHostID'}};
4770: my @domains;
4771: while( my($id, $name) = each(%hostname)) {
4772: # &logthis("-$id-$name-$hostname-");
4773: if ($hostname eq $name) {
4774: push(@domains,$hostdom{$id});
4775: }
4776: }
4777: return @domains;
4778: }
4779:
4780: sub current_machine_ids {
4781: my $hostname=$hostname{$perlvar{'lonHostID'}};
4782: my @ids;
4783: while( my($id, $name) = each(%hostname)) {
4784: # &logthis("-$id-$name-$hostname-");
4785: if ($hostname eq $name) {
4786: push(@ids,$id);
4787: }
4788: }
4789: return @ids;
4790: }
4791:
4792: # ------------------------------------------------------------- Declutters URLs
4793:
4794: sub declutter {
4795: my $thisfn=shift;
4796: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
4797: $thisfn=~s/^\///;
4798: $thisfn=~s/^res\///;
4799: $thisfn=~s/\?.+$//;
4800: return $thisfn;
4801: }
4802:
4803: # ------------------------------------------------------------- Clutter up URLs
4804:
4805: sub clutter {
4806: my $thisfn='/'.&declutter(shift);
4807: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
4808: $thisfn='/res'.$thisfn;
4809: }
4810: return $thisfn;
4811: }
4812:
4813: # -------------------------------------------------------- Escape Special Chars
4814:
4815: sub escape {
4816: my $str=shift;
4817: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
4818: return $str;
4819: }
4820:
4821: # ----------------------------------------------------- Un-Escape Special Chars
4822:
4823: sub unescape {
4824: my $str=shift;
4825: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
4826: return $str;
4827: }
4828:
4829: sub mod_perl_version {
4830: if (defined($perlvar{'MODPERL2'})) {
4831: return 2;
4832: }
4833: return 1;
4834: }
4835:
4836: sub correct_line_ends {
4837: my ($result)=@_;
4838: $$result =~s/\r\n/\n/mg;
4839: $$result =~s/\r/\n/mg;
4840: }
4841: # ================================================================ Main Program
4842:
4843: sub goodbye {
4844: &logthis("Starting Shut down");
4845: #not converted to using infrastruture and probably shouldn't be
4846: &logthis(sprintf("%-20s is %s",'%badServerCache',scalar(%badServerCache)));
4847: #converted
4848: &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
4849: &logthis(sprintf("%-20s is %s",'%homecache',scalar(%homecache)));
4850: &logthis(sprintf("%-20s is %s",'%titlecache',scalar(%titlecache)));
4851: &logthis(sprintf("%-20s is %s",'%courseresdatacache',scalar(%courseresdatacache)));
4852: #1.1 only
4853: &logthis(sprintf("%-20s is %s",'%userresdatacache',scalar(%userresdatacache)));
4854: &logthis(sprintf("%-20s is %s",'%usectioncache',scalar(%usectioncache)));
4855: &logthis(sprintf("%-20s is %s",'%courseresversioncache',scalar(%courseresversioncache)));
4856: &logthis(sprintf("%-20s is %s",'%resversioncache',scalar(%resversioncache)));
4857: &flushcourselogs();
4858: &logthis("Shutting down");
4859: return DONE;
4860: }
4861:
4862: BEGIN {
4863: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
4864: unless ($readit) {
4865: {
4866: open(my $config,"</etc/httpd/conf/loncapa.conf");
4867:
4868: while (my $configline=<$config>) {
4869: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
4870: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
4871: chomp($varvalue);
4872: $perlvar{$varname}=$varvalue;
4873: }
4874: }
4875: close($config);
4876: }
4877: {
4878: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
4879:
4880: while (my $configline=<$config>) {
4881: if ($configline =~ /^[^\#]*PerlSetVar/) {
4882: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
4883: chomp($varvalue);
4884: $perlvar{$varname}=$varvalue;
4885: }
4886: }
4887: close($config);
4888: }
4889:
4890: # ------------------------------------------------------------ Read domain file
4891: {
4892: %domaindescription = ();
4893: %domain_auth_def = ();
4894: %domain_auth_arg_def = ();
4895: my $fh;
4896: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
4897: while (<$fh>) {
4898: next if (/^(\#|\s*$)/);
4899: # next if /^\#/;
4900: chomp;
4901: my ($domain, $domain_description, $def_auth, $def_auth_arg,
4902: $def_lang, $city, $longi, $lati) = split(/:/,$_);
4903: $domain_auth_def{$domain}=$def_auth;
4904: $domain_auth_arg_def{$domain}=$def_auth_arg;
4905: $domaindescription{$domain}=$domain_description;
4906: $domain_lang_def{$domain}=$def_lang;
4907: $domain_city{$domain}=$city;
4908: $domain_longi{$domain}=$longi;
4909: $domain_lati{$domain}=$lati;
4910:
4911: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
4912: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
4913: }
4914: }
4915: close ($fh);
4916: }
4917:
4918:
4919: # ------------------------------------------------------------- Read hosts file
4920: {
4921: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
4922:
4923: while (my $configline=<$config>) {
4924: next if ($configline =~ /^(\#|\s*$)/);
4925: chomp($configline);
4926: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
4927: if ($id && $domain && $role && $name && $ip) {
4928: $hostname{$id}=$name;
4929: $hostdom{$id}=$domain;
4930: $hostip{$id}=$ip;
4931: $iphost{$ip}=$id;
4932: if ($role eq 'library') { $libserv{$id}=$name; }
4933: } else {
4934: if ($configline) {
4935: &logthis("Skipping hosts.tab line -$configline-");
4936: }
4937: }
4938: }
4939: close($config);
4940: }
4941:
4942: # ------------------------------------------------------ Read spare server file
4943: {
4944: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
4945:
4946: while (my $configline=<$config>) {
4947: chomp($configline);
4948: if ($configline) {
4949: $spareid{$configline}=1;
4950: }
4951: }
4952: close($config);
4953: }
4954: # ------------------------------------------------------------ Read permissions
4955: {
4956: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
4957:
4958: while (my $configline=<$config>) {
4959: chomp($configline);
4960: if ($configline) {
4961: my ($role,$perm)=split(/ /,$configline);
4962: if ($perm ne '') { $pr{$role}=$perm; }
4963: }
4964: }
4965: close($config);
4966: }
4967:
4968: # -------------------------------------------- Read plain texts for permissions
4969: {
4970: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
4971:
4972: while (my $configline=<$config>) {
4973: chomp($configline);
4974: if ($configline) {
4975: my ($short,$plain)=split(/:/,$configline);
4976: if ($plain ne '') { $prp{$short}=$plain; }
4977: }
4978: }
4979: close($config);
4980: }
4981:
4982: # ---------------------------------------------------------- Read package table
4983: {
4984: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
4985:
4986: while (my $configline=<$config>) {
4987: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
4988: chomp($configline);
4989: my ($short,$plain)=split(/:/,$configline);
4990: my ($pack,$name)=split(/\&/,$short);
4991: if ($plain ne '') {
4992: $packagetab{$pack.'&'.$name.'&name'}=$name;
4993: $packagetab{$short}=$plain;
4994: }
4995: }
4996: close($config);
4997: }
4998:
4999: # ------------- set up temporary directory
5000: {
5001: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
5002:
5003: }
5004:
5005: %metacache=();
5006:
5007: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
5008: $dumpcount=0;
5009:
5010: &logtouch();
5011: &logthis('<font color=yellow>INFO: Read configuration</font>');
5012: $readit=1;
5013: }
5014: }
5015:
5016: 1;
5017: __END__
5018:
5019: =pod
5020:
5021: =head1 NAME
5022:
5023: Apache::lonnet - Subroutines to ask questions about things in the network.
5024:
5025: =head1 SYNOPSIS
5026:
5027: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
5028:
5029: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
5030:
5031: Common parameters:
5032:
5033: =over 4
5034:
5035: =item *
5036:
5037: $uname : an internal username (if $cname expecting a course Id specifically)
5038:
5039: =item *
5040:
5041: $udom : a domain (if $cdom expecting a course's domain specifically)
5042:
5043: =item *
5044:
5045: $symb : a resource instance identifier
5046:
5047: =item *
5048:
5049: $namespace : the name of a .db file that contains the data needed or
5050: being set.
5051:
5052: =back
5053:
5054: =head1 OVERVIEW
5055:
5056: lonnet provides subroutines which interact with the
5057: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
5058: about classes, users, and resources.
5059:
5060: For many of these objects you can also use this to store data about
5061: them or modify them in various ways.
5062:
5063: =head2 Symbs
5064:
5065: To identify a specific instance of a resource, LON-CAPA uses symbols
5066: or "symbs"X<symb>. These identifiers are built from the URL of the
5067: map, the resource number of the resource in the map, and the URL of
5068: the resource itself. The latter is somewhat redundant, but might help
5069: if maps change.
5070:
5071: An example is
5072:
5073: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
5074:
5075: The respective map entry is
5076:
5077: <resource id="19" src="/res/msu/korte/tests/part12.problem"
5078: title="Problem 2">
5079: </resource>
5080:
5081: Symbs are used by the random number generator, as well as to store and
5082: restore data specific to a certain instance of for example a problem.
5083:
5084: =head2 Storing And Retrieving Data
5085:
5086: X<store()>X<cstore()>X<restore()>Three of the most important functions
5087: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
5088: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
5089: is is the non-critical message twin of cstore. These functions are for
5090: handlers to store a perl hash to a user's permanent data space in an
5091: easy manner, and to retrieve it again on another call. It is expected
5092: that a handler would use this once at the beginning to retrieve data,
5093: and then again once at the end to send only the new data back.
5094:
5095: The data is stored in the user's data directory on the user's
5096: homeserver under the ID of the course.
5097:
5098: The hash that is returned by restore will have all of the previous
5099: value for all of the elements of the hash.
5100:
5101: Example:
5102:
5103: #creating a hash
5104: my %hash;
5105: $hash{'foo'}='bar';
5106:
5107: #storing it
5108: &Apache::lonnet::cstore(\%hash);
5109:
5110: #changing a value
5111: $hash{'foo'}='notbar';
5112:
5113: #adding a new value
5114: $hash{'bar'}='foo';
5115: &Apache::lonnet::cstore(\%hash);
5116:
5117: #retrieving the hash
5118: my %history=&Apache::lonnet::restore();
5119:
5120: #print the hash
5121: foreach my $key (sort(keys(%history))) {
5122: print("\%history{$key} = $history{$key}");
5123: }
5124:
5125: Will print out:
5126:
5127: %history{1:foo} = bar
5128: %history{1:keys} = foo:timestamp
5129: %history{1:timestamp} = 990455579
5130: %history{2:bar} = foo
5131: %history{2:foo} = notbar
5132: %history{2:keys} = foo:bar:timestamp
5133: %history{2:timestamp} = 990455580
5134: %history{bar} = foo
5135: %history{foo} = notbar
5136: %history{timestamp} = 990455580
5137: %history{version} = 2
5138:
5139: Note that the special hash entries C<keys>, C<version> and
5140: C<timestamp> were added to the hash. C<version> will be equal to the
5141: total number of versions of the data that have been stored. The
5142: C<timestamp> attribute will be the UNIX time the hash was
5143: stored. C<keys> is available in every historical section to list which
5144: keys were added or changed at a specific historical revision of a
5145: hash.
5146:
5147: B<Warning>: do not store the hash that restore returns directly. This
5148: will cause a mess since it will restore the historical keys as if the
5149: were new keys. I.E. 1:foo will become 1:1:foo etc.
5150:
5151: Calling convention:
5152:
5153: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
5154: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
5155:
5156: For more detailed information, see lonnet specific documentation.
5157:
5158: =head1 RETURN MESSAGES
5159:
5160: =over 4
5161:
5162: =item * B<con_lost>: unable to contact remote host
5163:
5164: =item * B<con_delayed>: unable to contact remote host, message will be delivered
5165: when the connection is brought back up
5166:
5167: =item * B<con_failed>: unable to contact remote host and unable to save message
5168: for later delivery
5169:
5170: =item * B<error:>: an error a occured, a description of the error follows the :
5171:
5172: =item * B<no_such_host>: unable to fund a host associated with the user/domain
5173: that was requested
5174:
5175: =back
5176:
5177: =head1 PUBLIC SUBROUTINES
5178:
5179: =head2 Session Environment Functions
5180:
5181: =over 4
5182:
5183: =item *
5184: X<appenv()>
5185: B<appenv(%hash)>: the value of %hash is written to
5186: the user envirnoment file, and will be restored for each access this
5187: user makes during this session, also modifies the %ENV for the current
5188: process
5189:
5190: =item *
5191: X<delenv()>
5192: B<delenv($regexp)>: removes all items from the session
5193: environment file that matches the regular expression in $regexp. The
5194: values are also delted from the current processes %ENV.
5195:
5196: =back
5197:
5198: =head2 User Information
5199:
5200: =over 4
5201:
5202: =item *
5203: X<queryauthenticate()>
5204: B<queryauthenticate($uname,$udom)>: try to determine user's current
5205: authentication scheme
5206:
5207: =item *
5208: X<authenticate()>
5209: B<authenticate($uname,$upass,$udom)>: try to
5210: authenticate user from domain's lib servers (first use the current
5211: one). C<$upass> should be the users password.
5212:
5213: =item *
5214: X<homeserver()>
5215: B<homeserver($uname,$udom)>: find the server which has
5216: the user's directory and files (there must be only one), this caches
5217: the answer, and also caches if there is a borken connection.
5218:
5219: =item *
5220: X<idget()>
5221: B<idget($udom,@ids)>: find the usernames behind a list of IDs
5222: (IDs are a unique resource in a domain, there must be only 1 ID per
5223: username, and only 1 username per ID in a specific domain) (returns
5224: hash: id=>name,id=>name)
5225:
5226: =item *
5227: X<idrget()>
5228: B<idrget($udom,@unames)>: find the IDs behind a list of
5229: usernames (returns hash: name=>id,name=>id)
5230:
5231: =item *
5232: X<idput()>
5233: B<idput($udom,%ids)>: store away a list of names and associated IDs
5234:
5235: =item *
5236: X<rolesinit()>
5237: B<rolesinit($udom,$username,$authhost)>: get user privileges
5238:
5239: =item *
5240: X<usection()>
5241: B<usection($udom,$uname,$cname)>: finds the section of student in the
5242: course $cname, return section name/number or '' for "not in course"
5243: and '-1' for "no section"
5244:
5245: =item *
5246: X<userenvironment()>
5247: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
5248: passed in @what from the requested user's environment, returns a hash
5249:
5250: =back
5251:
5252: =head2 User Roles
5253:
5254: =over 4
5255:
5256: =item *
5257:
5258: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
5259: actions
5260: F: full access
5261: U,I,K: authentication modes (cxx only)
5262: '': forbidden
5263: 1: user needs to choose course
5264: 2: browse allowed
5265:
5266: =item *
5267:
5268: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
5269: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
5270: and course level
5271:
5272: =item *
5273:
5274: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
5275: explanation of a user role term
5276:
5277: =back
5278:
5279: =head2 User Modification
5280:
5281: =over 4
5282:
5283: =item *
5284:
5285: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
5286: user for the level given by URL. Optional start and end dates (leave empty
5287: string or zero for "no date")
5288:
5289: =item *
5290:
5291: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
5292: change a users, password, possible return values are: ok,
5293: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
5294: refused
5295:
5296: =item *
5297:
5298: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
5299:
5300: =item *
5301:
5302: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
5303: modify user
5304:
5305: =item *
5306:
5307: modifystudent
5308:
5309: modify a students enrollment and identification information.
5310: The course id is resolved based on the current users environment.
5311: This means the envoking user must be a course coordinator or otherwise
5312: associated with a course.
5313:
5314: This call is essentially a wrapper for lonnet::modifyuser and
5315: lonnet::modify_student_enrollment
5316:
5317: Inputs:
5318:
5319: =over 4
5320:
5321: =item B<$udom> Students loncapa domain
5322:
5323: =item B<$uname> Students loncapa login name
5324:
5325: =item B<$uid> Students id/student number
5326:
5327: =item B<$umode> Students authentication mode
5328:
5329: =item B<$upass> Students password
5330:
5331: =item B<$first> Students first name
5332:
5333: =item B<$middle> Students middle name
5334:
5335: =item B<$last> Students last name
5336:
5337: =item B<$gene> Students generation
5338:
5339: =item B<$usec> Students section in course
5340:
5341: =item B<$end> Unix time of the roles expiration
5342:
5343: =item B<$start> Unix time of the roles start date
5344:
5345: =item B<$forceid> If defined, allow $uid to be changed
5346:
5347: =item B<$desiredhome> server to use as home server for student
5348:
5349: =back
5350:
5351: =item *
5352:
5353: modify_student_enrollment
5354:
5355: Change a students enrollment status in a class. The environment variable
5356: 'role.request.course' must be defined for this function to proceed.
5357:
5358: Inputs:
5359:
5360: =over 4
5361:
5362: =item $udom, students domain
5363:
5364: =item $uname, students name
5365:
5366: =item $uid, students user id
5367:
5368: =item $first, students first name
5369:
5370: =item $middle
5371:
5372: =item $last
5373:
5374: =item $gene
5375:
5376: =item $usec
5377:
5378: =item $end
5379:
5380: =item $start
5381:
5382: =back
5383:
5384:
5385: =item *
5386:
5387: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
5388: custom role; give a custom role to a user for the level given by URL. Specify
5389: name and domain of role author, and role name
5390:
5391: =item *
5392:
5393: revokerole($udom,$uname,$url,$role) : revoke a role for url
5394:
5395: =item *
5396:
5397: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
5398:
5399: =back
5400:
5401: =head2 Course Infomation
5402:
5403: =over 4
5404:
5405: =item *
5406:
5407: coursedescription($courseid) : course description
5408:
5409: =item *
5410:
5411: courseresdata($coursenum,$coursedomain,@which) : request for current
5412: parameter setting for a specific course, @what should be a list of
5413: parameters to ask about. This routine caches answers for 5 minutes.
5414:
5415: =back
5416:
5417: =head2 Course Modification
5418:
5419: =over 4
5420:
5421: =item *
5422:
5423: writecoursepref($courseid,%prefs) : write preferences (environment
5424: database) for a course
5425:
5426: =item *
5427:
5428: createcourse($udom,$description,$url) : make/modify course
5429:
5430: =back
5431:
5432: =head2 Resource Subroutines
5433:
5434: =over 4
5435:
5436: =item *
5437:
5438: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
5439:
5440: =item *
5441:
5442: repcopy($filename) : subscribes to the requested file, and attempts to
5443: replicate from the owning library server, Might return
5444: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
5445: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
5446: resource. Expects the local filesystem pathname
5447: (/home/httpd/html/res/....)
5448:
5449: =back
5450:
5451: =head2 Resource Information
5452:
5453: =over 4
5454:
5455: =item *
5456:
5457: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
5458: a vairety of different possible values, $varname should be a request
5459: string, and the other parameters can be used to specify who and what
5460: one is asking about.
5461:
5462: Possible values for $varname are environment.lastname (or other item
5463: from the envirnment hash), user.name (or someother aspect about the
5464: user), resource.0.maxtries (or some other part and parameter of a
5465: resource)
5466:
5467: =item *
5468:
5469: directcondval($number) : get current value of a condition; reads from a state
5470: string
5471:
5472: =item *
5473:
5474: condval($condidx) : value of condition index based on state
5475:
5476: =item *
5477:
5478: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
5479: resource's metadata, $what should be either a specific key, or either
5480: 'keys' (to get a list of possible keys) or 'packages' to get a list of
5481: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
5482:
5483: this function automatically caches all requests
5484:
5485: =item *
5486:
5487: metadata_query($query,$custom,$customshow) : make a metadata query against the
5488: network of library servers; returns file handle of where SQL and regex results
5489: will be stored for query
5490:
5491: =item *
5492:
5493: symbread($filename) : return symbolic list entry (filename argument optional);
5494: returns the data handle
5495:
5496: =item *
5497:
5498: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
5499: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
5500: failure, user must be in a course, as it assumes the existance of the
5501: course initi hash, and uses $ENV('request.course.id'}
5502:
5503:
5504: =item *
5505:
5506: symbclean($symb) : removes versions numbers from a symb, returns the
5507: cleaned symb
5508:
5509: =item *
5510:
5511: is_on_map($uri) : checks if the $uri is somewhere on the current
5512: course map, user must be in a course for it to work.
5513:
5514: =item *
5515:
5516: numval($salt) : return random seed value (addend for rndseed)
5517:
5518: =item *
5519:
5520: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
5521: a random seed, all arguments are optional, if they aren't sent it uses the
5522: environment to derive them. Note: if symb isn't sent and it can't get one
5523: from &symbread it will use the current time as its return value
5524:
5525: =item *
5526:
5527: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
5528: unfakeable, receipt
5529:
5530: =item *
5531:
5532: receipt() : API to ireceipt working off of ENV values; given out to users
5533:
5534: =item *
5535:
5536: countacc($url) : count the number of accesses to a given URL
5537:
5538: =item *
5539:
5540: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
5541:
5542: =item *
5543:
5544: checkin($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 $tcrsid)
5545:
5546: =item *
5547:
5548: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
5549:
5550: =item *
5551:
5552: devalidate($symb) : devalidate temporary spreadsheet calculations,
5553: forcing spreadsheet to reevaluate the resource scores next time.
5554:
5555: =back
5556:
5557: =head2 Storing/Retreiving Data
5558:
5559: =over 4
5560:
5561: =item *
5562:
5563: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
5564: for this url; hashref needs to be given and should be a \%hashname; the
5565: remaining args aren't required and if they aren't passed or are '' they will
5566: be derived from the ENV
5567:
5568: =item *
5569:
5570: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
5571: uses critical subroutine
5572:
5573: =item *
5574:
5575: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
5576: all args are optional
5577:
5578: =item *
5579:
5580: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
5581: works very similar to store/cstore, but all data is stored in a
5582: temporary location and can be reset using tmpreset, $storehash should
5583: be a hash reference, returns nothing on success
5584:
5585: =item *
5586:
5587: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
5588: similar to restore, but all data is stored in a temporary location and
5589: can be reset using tmpreset. Returns a hash of values on success,
5590: error string otherwise.
5591:
5592: =item *
5593:
5594: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
5595: deltes all keys for $symb form the temporary storage hash.
5596:
5597: =item *
5598:
5599: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5600: reference filled in from namesp ($udom and $uname are optional)
5601:
5602: =item *
5603:
5604: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
5605: namesp ($udom and $uname are optional)
5606:
5607: =item *
5608:
5609: dump($namespace,$udom,$uname,$regexp) :
5610: dumps the complete (or key matching regexp) namespace into a hash
5611: ($udom, $uname and $regexp are optional)
5612:
5613: =item *
5614:
5615: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
5616: $store can be a scalar, an array reference, or if the amount to be
5617: incremented is > 1, a hash reference.
5618:
5619: ($udom and $uname are optional)
5620:
5621: =item *
5622:
5623: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
5624: ($udom and $uname are optional)
5625:
5626: =item *
5627:
5628: cput($namespace,$storehash,$udom,$uname) : critical put
5629: ($udom and $uname are optional)
5630:
5631: =item *
5632:
5633: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5634: reference filled in from namesp (encrypts the return communication)
5635: ($udom and $uname are optional)
5636:
5637: =item *
5638:
5639: log($udom,$name,$home,$message) : write to permanent log for user; use
5640: critical subroutine
5641:
5642: =back
5643:
5644: =head2 Network Status Functions
5645:
5646: =over 4
5647:
5648: =item *
5649:
5650: dirlist($uri) : return directory list based on URI
5651:
5652: =item *
5653:
5654: spareserver() : find server with least workload from spare.tab
5655:
5656: =back
5657:
5658: =head2 Apache Request
5659:
5660: =over 4
5661:
5662: =item *
5663:
5664: ssi($url,%hash) : server side include, does a complete request cycle on url to
5665: localhost, posts hash
5666:
5667: =back
5668:
5669: =head2 Data to String to Data
5670:
5671: =over 4
5672:
5673: =item *
5674:
5675: hash2str(%hash) : convert a hash into a string complete with escaping and '='
5676: and '&' separators, supports elements that are arrayrefs and hashrefs
5677:
5678: =item *
5679:
5680: hashref2str($hashref) : convert a hashref into a string complete with
5681: escaping and '=' and '&' separators, supports elements that are
5682: arrayrefs and hashrefs
5683:
5684: =item *
5685:
5686: arrayref2str($arrayref) : convert an arrayref into a string complete
5687: with escaping and '&' separators, supports elements that are arrayrefs
5688: and hashrefs
5689:
5690: =item *
5691:
5692: str2hash($string) : convert string to hash using unescaping and
5693: splitting on '=' and '&', supports elements that are arrayrefs and
5694: hashrefs
5695:
5696: =item *
5697:
5698: str2array($string) : convert string to hash using unescaping and
5699: splitting on '&', supports elements that are arrayrefs and hashrefs
5700:
5701: =back
5702:
5703: =head2 Logging Routines
5704:
5705: =over 4
5706:
5707: These routines allow one to make log messages in the lonnet.log and
5708: lonnet.perm logfiles.
5709:
5710: =item *
5711:
5712: logtouch() : make sure the logfile, lonnet.log, exists
5713:
5714: =item *
5715:
5716: logthis() : append message to the normal lonnet.log file, it gets
5717: preiodically rolled over and deleted.
5718:
5719: =item *
5720:
5721: logperm() : append a permanent message to lonnet.perm.log, this log
5722: file never gets deleted by any automated portion of the system, only
5723: messages of critical importance should go in here.
5724:
5725: =back
5726:
5727: =head2 General File Helper Routines
5728:
5729: =over 4
5730:
5731: =item *
5732:
5733: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
5734: (a) files in /uploaded
5735: (i) If a local copy of the file exists -
5736: compares modification date of local copy with last-modified date for
5737: definitive version stored on home server for course. If local copy is
5738: stale, requests a new version from the home server and stores it.
5739: If the original has been removed from the home server, then local copy
5740: is unlinked.
5741: (ii) If local copy does not exist -
5742: requests the file from the home server and stores it.
5743:
5744: If $caller is 'uploadrep':
5745: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
5746: for request for files originally uploaded via DOCS.
5747: - returns 'ok' if fresh local copy now available, -1 otherwise.
5748:
5749: Otherwise:
5750: This indicates a call from the content generation phase of the request.
5751: - returns the entire contents of the file or -1.
5752:
5753: (b) files in /res
5754: - returns the entire contents of a file or -1;
5755: it properly subscribes to and replicates the file if neccessary.
5756:
5757: =item *
5758:
5759: filelocation($dir,$file) : returns file system location of a file
5760: based on URI; meant to be "fairly clean" absolute reference, $dir is a
5761: directory that relative $file lookups are to looked in ($dir of /a/dir
5762: and a file of ../bob will become /a/bob)
5763:
5764: =item *
5765:
5766: hreflocation($dir,$file) : returns file system location or a URL; same as
5767: filelocation except for hrefs
5768:
5769: =item *
5770:
5771: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
5772:
5773: =back
5774:
5775: =head2 HTTP Helper Routines
5776:
5777: =over 4
5778:
5779: =item *
5780:
5781: escape() : unpack non-word characters into CGI-compatible hex codes
5782:
5783: =item *
5784:
5785: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
5786:
5787: =back
5788:
5789: =head1 PRIVATE SUBROUTINES
5790:
5791: =head2 Underlying communication routines (Shouldn't call)
5792:
5793: =over 4
5794:
5795: =item *
5796:
5797: subreply() : tries to pass a message to lonc, returns con_lost if incapable
5798:
5799: =item *
5800:
5801: reply() : uses subreply to send a message to remote machine, logs all failures
5802:
5803: =item *
5804:
5805: critical() : passes a critical message to another server; if cannot
5806: get through then place message in connection buffer directory and
5807: returns con_delayed, if incapable of saving message, returns
5808: con_failed
5809:
5810: =item *
5811:
5812: reconlonc() : tries to reconnect lonc client processes.
5813:
5814: =back
5815:
5816: =head2 Resource Access Logging
5817:
5818: =over 4
5819:
5820: =item *
5821:
5822: flushcourselogs() : flush (save) buffer logs and access logs
5823:
5824: =item *
5825:
5826: courselog($what) : save message for course in hash
5827:
5828: =item *
5829:
5830: courseacclog($what) : save message for course using &courselog(). Perform
5831: special processing for specific resource types (problems, exams, quizzes, etc).
5832:
5833: =item *
5834:
5835: goodbye() : flush course logs and log shutting down; it is called in srm.conf
5836: as a PerlChildExitHandler
5837:
5838: =back
5839:
5840: =head2 Other
5841:
5842: =over 4
5843:
5844: =item *
5845:
5846: symblist($mapname,%newhash) : update symbolic storage links
5847:
5848: =back
5849:
5850: =cut
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