1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.525 2004/08/05 16:59:29 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 %courseinstcodebuf %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 '.$checkserver);
437: return 409;
438: }
439: return '';
440: }
441:
442: # ------------------------------ Find server with least workload from spare.tab
443:
444: sub spareserver {
445: my ($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 ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
646: $kdom=
647: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($kdom));
648: $knum=
649: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($knum));
650: $cdom=
651: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
652: $cnum=
653: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
654: $udom=$ENV{'user.name'} unless (defined($udom));
655: $uname=$ENV{'user.domain'} unless (defined($uname));
656: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
657: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
658: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
659: # assigned to this person
660: # - this should not happen,
661: # unless something went wrong
662: # the first time around
663: # ready to assign
664: $logentry=$1.'; '.$logentry;
665: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
666: $kdom,$knum) eq 'ok') {
667: # key now belongs to user
668: my $envkey='key.'.$cdom.'_'.$cnum;
669: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
670: &appenv('environment.'.$envkey => $ckey);
671: return 'ok';
672: } else {
673: return
674: 'error: Count not permanently assign key, will need to be re-entered later.';
675: }
676: } else {
677: return 'error: Could not assign key, try again later.';
678: }
679: } elsif (!$existing{$ckey}) {
680: # the key does not exist
681: return 'error: The key does not exist';
682: } else {
683: # the key is somebody else's
684: return 'error: The key is already in use';
685: }
686: }
687:
688: # ------------------------------------------ put an additional comment on a key
689:
690: sub comment_access_key {
691: #
692: # a valid key looks like uname:udom#comments
693: # comments are being appended
694: #
695: my ($ckey,$cdom,$cnum,$logentry)=@_;
696: $cdom=
697: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
698: $cnum=
699: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
700: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
701: if ($existing{$ckey}) {
702: $existing{$ckey}.='; '.$logentry;
703: # ready to assign
704: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
705: $cdom,$cnum) eq 'ok') {
706: return 'ok';
707: } else {
708: return 'error: Count not store comment.';
709: }
710: } else {
711: # the key does not exist
712: return 'error: The key does not exist';
713: }
714: }
715:
716: # ------------------------------------------------------ Generate a set of keys
717:
718: sub generate_access_keys {
719: my ($number,$cdom,$cnum,$logentry)=@_;
720: $cdom=
721: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
722: $cnum=
723: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
724: unless (&allowed('mky',$cdom)) { return 0; }
725: unless (($cdom) && ($cnum)) { return 0; }
726: if ($number>10000) { return 0; }
727: sleep(2); # make sure don't get same seed twice
728: srand(time()^($$+($$<<15))); # from "Programming Perl"
729: my $total=0;
730: for (my $i=1;$i<=$number;$i++) {
731: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
732: sprintf("%lx",int(100000*rand)).'-'.
733: sprintf("%lx",int(100000*rand));
734: $newkey=~s/1/g/g; # folks mix up 1 and l
735: $newkey=~s/0/h/g; # and also 0 and O
736: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
737: if ($existing{$newkey}) {
738: $i--;
739: } else {
740: if (&put('accesskeys',
741: { $newkey => '# generated '.localtime().
742: ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
743: '; '.$logentry },
744: $cdom,$cnum) eq 'ok') {
745: $total++;
746: }
747: }
748: }
749: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
750: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
751: return $total;
752: }
753:
754: # ------------------------------------------------------- Validate an accesskey
755:
756: sub validate_access_key {
757: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
758: $cdom=
759: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
760: $cnum=
761: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
762: $udom=$ENV{'user.domain'} unless (defined($udom));
763: $uname=$ENV{'user.name'} unless (defined($uname));
764: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
765: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
766: }
767:
768: # ------------------------------------- Find the section of student in a course
769:
770: sub getsection {
771: my ($udom,$unam,$courseid)=@_;
772: $courseid=~s/\_/\//g;
773: $courseid=~s/^(\w)/\/$1/;
774: my %Pending;
775: my %Expired;
776: #
777: # Each role can either have not started yet (pending), be active,
778: # or have expired.
779: #
780: # If there is an active role, we are done.
781: #
782: # If there is more than one role which has not started yet,
783: # choose the one which will start sooner
784: # If there is one role which has not started yet, return it.
785: #
786: # If there is more than one expired role, choose the one which ended last.
787: # If there is a role which has expired, return it.
788: #
789: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
790: &homeserver($unam,$udom)))) {
791: my ($key,$value)=split(/\=/,$_);
792: $key=&unescape($key);
793: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
794: my $section=$1;
795: if ($key eq $courseid.'_st') { $section=''; }
796: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
797: my $now=time;
798: if (defined($end) && ($now > $end)) {
799: $Expired{$end}=$section;
800: next;
801: }
802: if (defined($start) && ($now < $start)) {
803: $Pending{$start}=$section;
804: next;
805: }
806: return $section;
807: }
808: #
809: # Presumedly there will be few matching roles from the above
810: # loop and the sorting time will be negligible.
811: if (scalar(keys(%Pending))) {
812: my ($time) = sort {$a <=> $b} keys(%Pending);
813: return $Pending{$time};
814: }
815: if (scalar(keys(%Expired))) {
816: my @sorted = sort {$a <=> $b} keys(%Expired);
817: my $time = pop(@sorted);
818: return $Expired{$time};
819: }
820: return '-1';
821: }
822:
823:
824: my $disk_caching_disabled=1;
825:
826: sub devalidate_cache {
827: my ($cache,$id,$name) = @_;
828: delete $$cache{$id.'.time'};
829: delete $$cache{$id};
830: if ($disk_caching_disabled) { return; }
831: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
832: open(DB,"$filename.lock");
833: flock(DB,LOCK_EX);
834: my %hash;
835: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
836: eval <<'EVALBLOCK';
837: delete($hash{$id});
838: delete($hash{$id.'.time'});
839: EVALBLOCK
840: if ($@) {
841: &logthis("<font color='red'>devalidate_cache blew up :$@:$name</font>");
842: unlink($filename);
843: }
844: } else {
845: if (-e $filename) {
846: &logthis("Unable to tie hash (devalidate cache): $name");
847: unlink($filename);
848: }
849: }
850: untie(%hash);
851: flock(DB,LOCK_UN);
852: close(DB);
853: }
854:
855: sub is_cached {
856: my ($cache,$id,$name,$time) = @_;
857: if (!$time) { $time=300; }
858: if (!exists($$cache{$id.'.time'})) {
859: &load_cache_item($cache,$name,$id);
860: }
861: if (!exists($$cache{$id.'.time'})) {
862: # &logthis("Didn't find $id");
863: return (undef,undef);
864: } else {
865: if (time-($$cache{$id.'.time'})>$time) {
866: # &logthis("Devalidating $id - ".time-($$cache{$id.'.time'}));
867: &devalidate_cache($cache,$id,$name);
868: return (undef,undef);
869: }
870: }
871: return ($$cache{$id},1);
872: }
873:
874: sub do_cache {
875: my ($cache,$id,$value,$name) = @_;
876: $$cache{$id.'.time'}=time;
877: $$cache{$id}=$value;
878: # &logthis("Caching $id as :$value:");
879: &save_cache_item($cache,$name,$id);
880: # do_cache implictly return the set value
881: $$cache{$id};
882: }
883:
884: sub save_cache_item {
885: my ($cache,$name,$id)=@_;
886: if ($disk_caching_disabled) { return; }
887: my $starttime=&Time::HiRes::time();
888: # &logthis("Saving :$name:$id");
889: my %hash;
890: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
891: open(DB,"$filename.lock");
892: flock(DB,LOCK_EX);
893: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
894: eval <<'EVALBLOCK';
895: $hash{$id.'.time'}=$$cache{$id.'.time'};
896: $hash{$id}=freeze({'item'=>$$cache{$id}});
897: EVALBLOCK
898: if ($@) {
899: &logthis("<font color='red'>save_cache blew up :$@:$name</font>");
900: unlink($filename);
901: }
902: } else {
903: if (-e $filename) {
904: &logthis("Unable to tie hash (save cache item): $name ($!)");
905: unlink($filename);
906: }
907: }
908: untie(%hash);
909: flock(DB,LOCK_UN);
910: close(DB);
911: # &logthis("save_cache_item $name took ".(&Time::HiRes::time()-$starttime));
912: }
913:
914: sub load_cache_item {
915: my ($cache,$name,$id)=@_;
916: if ($disk_caching_disabled) { return; }
917: my $starttime=&Time::HiRes::time();
918: # &logthis("Before Loading $name for $id size is ".scalar(%$cache));
919: my %hash;
920: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
921: open(DB,"$filename.lock");
922: flock(DB,LOCK_SH);
923: if (tie(%hash,'GDBM_File',$filename,&GDBM_READER(),0640)) {
924: eval <<'EVALBLOCK';
925: if (!%$cache) {
926: my $count;
927: while (my ($key,$value)=each(%hash)) {
928: $count++;
929: if ($key =~ /\.time$/) {
930: $$cache{$key}=$value;
931: } else {
932: my $hashref=thaw($value);
933: $$cache{$key}=$hashref->{'item'};
934: }
935: }
936: # &logthis("Initial load: $count");
937: } else {
938: my $hashref=thaw($hash{$id});
939: $$cache{$id}=$hashref->{'item'};
940: $$cache{$id.'.time'}=$hash{$id.'.time'};
941: }
942: EVALBLOCK
943: if ($@) {
944: &logthis("<font color='red'>load_cache blew up :$@:$name</font>");
945: unlink($filename);
946: }
947: } else {
948: if (-e $filename) {
949: &logthis("Unable to tie hash (load cache item): $name ($!)");
950: unlink($filename);
951: }
952: }
953: untie(%hash);
954: flock(DB,LOCK_UN);
955: close(DB);
956: # &logthis("After Loading $name size is ".scalar(%$cache));
957: # &logthis("load_cache_item $name took ".(&Time::HiRes::time()-$starttime));
958: }
959:
960: sub usection {
961: my ($udom,$unam,$courseid)=@_;
962: my $hashid="$udom:$unam:$courseid";
963:
964: my ($result,$cached)=&is_cached(\%usectioncache,$hashid,'usection');
965: if (defined($cached)) { return $result; }
966: $courseid=~s/\_/\//g;
967: $courseid=~s/^(\w)/\/$1/;
968: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
969: &homeserver($unam,$udom)))) {
970: my ($key,$value)=split(/\=/,$_);
971: $key=&unescape($key);
972: if ($key=~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/) {
973: my $section=$1;
974: if ($key eq $courseid.'_st') { $section=''; }
975: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
976: my $now=time;
977: my $notactive=0;
978: if ($start) {
979: if ($now<$start) { $notactive=1; }
980: }
981: if ($end) {
982: if ($now>$end) { $notactive=1; }
983: }
984: unless ($notactive) {
985: return &do_cache(\%usectioncache,$hashid,$section,'usection');
986: }
987: }
988: }
989: return &do_cache(\%usectioncache,$hashid,'-1','usection');
990: }
991:
992: # ------------------------------------- Read an entry from a user's environment
993:
994: sub userenvironment {
995: my ($udom,$unam,@what)=@_;
996: my %returnhash=();
997: my @answer=split(/\&/,
998: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
999: &homeserver($unam,$udom)));
1000: my $i;
1001: for ($i=0;$i<=$#what;$i++) {
1002: $returnhash{$what[$i]}=&unescape($answer[$i]);
1003: }
1004: return %returnhash;
1005: }
1006:
1007: # -------------------------------------------------------------------- New chat
1008:
1009: sub chatsend {
1010: my ($newentry,$anon)=@_;
1011: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1012: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1013: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1014: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1015: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
1016: &escape($newentry)),$chome);
1017: }
1018:
1019: # ------------------------------------------ Find current version of a resource
1020:
1021: sub getversion {
1022: my $fname=&clutter(shift);
1023: unless ($fname=~/^\/res\//) { return -1; }
1024: return ¤tversion(&filelocation('',$fname));
1025: }
1026:
1027: sub currentversion {
1028: my $fname=shift;
1029: my ($result,$cached)=&is_cached(\%resversioncache,$fname,'resversion',600);
1030: if (defined($cached)) { return $result; }
1031: my $author=$fname;
1032: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1033: my ($udom,$uname)=split(/\//,$author);
1034: my $home=homeserver($uname,$udom);
1035: if ($home eq 'no_host') {
1036: return -1;
1037: }
1038: my $answer=reply("currentversion:$fname",$home);
1039: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1040: return -1;
1041: }
1042: return &do_cache(\%resversioncache,$fname,$answer,'resversion');
1043: }
1044:
1045: # ----------------------------- Subscribe to a resource, return URL if possible
1046:
1047: sub subscribe {
1048: my $fname=shift;
1049: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1050: my $author=$fname;
1051: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1052: my ($udom,$uname)=split(/\//,$author);
1053: my $home=homeserver($uname,$udom);
1054: if ($home eq 'no_host') {
1055: return 'not_found';
1056: }
1057: my $answer=reply("sub:$fname",$home);
1058: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1059: $answer.=' by '.$home;
1060: }
1061: return $answer;
1062: }
1063:
1064: # -------------------------------------------------------------- Replicate file
1065:
1066: sub repcopy {
1067: my $filename=shift;
1068: $filename=~s/\/+/\//g;
1069: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
1070: my $transname="$filename.in.transfer";
1071: if ((-e $filename) || (-e $transname)) { return OK; }
1072: my $remoteurl=subscribe($filename);
1073: if ($remoteurl =~ /^con_lost by/) {
1074: &logthis("Subscribe returned $remoteurl: $filename");
1075: return HTTP_SERVICE_UNAVAILABLE;
1076: } elsif ($remoteurl eq 'not_found') {
1077: #&logthis("Subscribe returned not_found: $filename");
1078: return HTTP_NOT_FOUND;
1079: } elsif ($remoteurl =~ /^rejected by/) {
1080: &logthis("Subscribe returned $remoteurl: $filename");
1081: return FORBIDDEN;
1082: } elsif ($remoteurl eq 'directory') {
1083: return OK;
1084: } else {
1085: my $author=$filename;
1086: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1087: my ($udom,$uname)=split(/\//,$author);
1088: my $home=homeserver($uname,$udom);
1089: unless ($home eq $perlvar{'lonHostID'}) {
1090: my @parts=split(/\//,$filename);
1091: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1092: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1093: &logthis("Malconfiguration for replication: $filename");
1094: return HTTP_BAD_REQUEST;
1095: }
1096: my $count;
1097: for ($count=5;$count<$#parts;$count++) {
1098: $path.="/$parts[$count]";
1099: if ((-e $path)!=1) {
1100: mkdir($path,0777);
1101: }
1102: }
1103: my $ua=new LWP::UserAgent;
1104: my $request=new HTTP::Request('GET',"$remoteurl");
1105: my $response=$ua->request($request,$transname);
1106: if ($response->is_error()) {
1107: unlink($transname);
1108: my $message=$response->status_line;
1109: &logthis("<font color=blue>WARNING:"
1110: ." LWP get: $message: $filename</font>");
1111: return HTTP_SERVICE_UNAVAILABLE;
1112: } else {
1113: if ($remoteurl!~/\.meta$/) {
1114: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1115: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1116: if ($mresponse->is_error()) {
1117: unlink($filename.'.meta');
1118: &logthis(
1119: "<font color=yellow>INFO: No metadata: $filename</font>");
1120: }
1121: }
1122: rename($transname,$filename);
1123: return OK;
1124: }
1125: }
1126: }
1127: }
1128:
1129: # ------------------------------------------------ Get server side include body
1130: sub ssi_body {
1131: my ($filelink,%form)=@_;
1132: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1133: &ssi($filelink,%form));
1134: $output=~
1135: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
1136: $output=~s/^.*?\<body[^\>]*\>//si;
1137: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1138: return $output;
1139: }
1140:
1141: # --------------------------------------------------------- Server Side Include
1142:
1143: sub ssi {
1144:
1145: my ($fn,%form)=@_;
1146:
1147: my $ua=new LWP::UserAgent;
1148:
1149: my $request;
1150:
1151: if (%form) {
1152: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1153: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1154: } else {
1155: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1156: }
1157:
1158: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1159: my $response=$ua->request($request);
1160:
1161: return $response->content;
1162: }
1163:
1164: sub externalssi {
1165: my ($url)=@_;
1166: my $ua=new LWP::UserAgent;
1167: my $request=new HTTP::Request('GET',$url);
1168: my $response=$ua->request($request);
1169: return $response->content;
1170: }
1171:
1172: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1173:
1174: sub allowuploaded {
1175: my ($srcurl,$url)=@_;
1176: $url=&clutter(&declutter($url));
1177: my $dir=$url;
1178: $dir=~s/\/[^\/]+$//;
1179: my %httpref=();
1180: my $httpurl=&hreflocation('',$url);
1181: $httpref{'httpref.'.$httpurl}=$srcurl;
1182: &Apache::lonnet::appenv(%httpref);
1183: }
1184:
1185: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1186: # input: action, courseID, current domain, home server for course, intended
1187: # path to file, source of file.
1188: # output: url to file (if action was uploaddoc),
1189: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1190: #
1191: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1192: # course.
1193: #
1194: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1195: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1196: # course's home server.
1197: #
1198: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1199: # be copied from $source (current location) to
1200: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1201: # and will then be copied to
1202: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1203: # course's home server.
1204: #
1205: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1206: # will be retrived from $ENV{form.uploaddoc} (from DOCS interface) to
1207: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1208: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1209: # in course's home server.
1210:
1211:
1212: sub process_coursefile {
1213: my ($action,$docuname,$docudom,$docuhome,$file,$source)=@_;
1214: my $fetchresult;
1215: if ($action eq 'propagate') {
1216: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file
1217: ,$docuhome);
1218: } else {
1219: my $fetchresult = '';
1220: my $fpath = '';
1221: my $fname = $file;
1222: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1223: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1224: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1225: unless ($fpath eq '') {
1226: my @parts=split('/',$fpath);
1227: foreach my $part (@parts) {
1228: $filepath.= '/'.$part;
1229: if ((-e $filepath)!=1) {
1230: mkdir($filepath,0777);
1231: }
1232: }
1233: }
1234: if ($action eq 'copy') {
1235: if ($source eq '') {
1236: $fetchresult = 'no source file';
1237: return $fetchresult;
1238: } else {
1239: my $destination = $filepath.'/'.$fname;
1240: rename($source,$destination);
1241: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1242: $docuhome);
1243: }
1244: } elsif ($action eq 'uploaddoc') {
1245: open(my $fh,'>'.$filepath.'/'.$fname);
1246: print $fh $ENV{'form.'.$source};
1247: close($fh);
1248: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1249: $docuhome);
1250: if ($fetchresult eq 'ok') {
1251: return '/uploaded/'.$fpath.'/'.$fname;
1252: } else {
1253: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1254: ' to host '.$docuhome.': '.$fetchresult);
1255: return '/adm/notfound.html';
1256: }
1257: }
1258: }
1259: unless ( $fetchresult eq 'ok') {
1260: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1261: ' to host '.$docuhome.': '.$fetchresult);
1262: }
1263: return $fetchresult;
1264: }
1265:
1266: # --------------- Take an uploaded file and put it into the userfiles directory
1267: # input: name of form element, coursedoc=1 means this is for the course
1268: # output: url of file in userspace
1269:
1270: sub userfileupload {
1271: my ($formname,$coursedoc,$subdir)=@_;
1272: if (!defined($subdir)) { $subdir='unknown'; }
1273: my $fname=$ENV{'form.'.$formname.'.filename'};
1274: # Replace Windows backslashes by forward slashes
1275: $fname=~s/\\/\//g;
1276: # Get rid of everything but the actual filename
1277: $fname=~s/^.*\/([^\/]+)$/$1/;
1278: # Replace spaces by underscores
1279: $fname=~s/\s+/\_/g;
1280: # Replace all other weird characters by nothing
1281: $fname=~s/[^\w\.\-]//g;
1282: # See if there is anything left
1283: unless ($fname) { return 'error: no uploaded file'; }
1284: chop($ENV{'form.'.$formname});
1285: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1286: my $now = time;
1287: my $filepath = 'tmp/helprequests/'.$now;
1288: my @parts=split(/\//,$filepath);
1289: my $fullpath = $perlvar{'lonDaemons'};
1290: for (my $i=0;$i<@parts;$i++) {
1291: $fullpath .= '/'.$parts[$i];
1292: if ((-e $fullpath)!=1) {
1293: mkdir($fullpath,0777);
1294: }
1295: }
1296: open(my $fh,'>'.$fullpath.'/'.$fname);
1297: print $fh $ENV{'form.'.$formname};
1298: close($fh);
1299: return $fullpath.'/'.$fname;
1300: }
1301: # Create the directory if not present
1302: my $docuname='';
1303: my $docudom='';
1304: my $docuhome='';
1305: $fname="$subdir/$fname";
1306: if ($coursedoc) {
1307: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1308: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1309: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1310: if ($ENV{'form.folder'} =~ m/^default/) {
1311: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1312: } else {
1313: $fname=$ENV{'form.folder'}.'/'.$fname;
1314: return &process_coursefile('uploaddoc',$docuname,$docudom,$docuhome,$fname,$formname);
1315: }
1316: } else {
1317: $docuname=$ENV{'user.name'};
1318: $docudom=$ENV{'user.domain'};
1319: $docuhome=$ENV{'user.home'};
1320: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1321: }
1322: }
1323:
1324: sub finishuserfileupload {
1325: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1326: my $path=$docudom.'/'.$docuname.'/';
1327: my $filepath=$perlvar{'lonDocRoot'};
1328: my ($fnamepath,$file);
1329: $file=$fname;
1330: if ($fname=~m|/|) {
1331: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1332: $path.=$fnamepath.'/';
1333: }
1334: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1335: my $count;
1336: for ($count=4;$count<=$#parts;$count++) {
1337: $filepath.="/$parts[$count]";
1338: if ((-e $filepath)!=1) {
1339: mkdir($filepath,0777);
1340: }
1341: }
1342: # Save the file
1343: {
1344: #&Apache::lonnet::logthis("Saving to $filepath $file");
1345: open(my $fh,'>'.$filepath.'/'.$file);
1346: print $fh $ENV{'form.'.$formname};
1347: close($fh);
1348: }
1349: # Notify homeserver to grep it
1350: #
1351: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1352: if ($fetchresult eq 'ok') {
1353: #
1354: # Return the URL to it
1355: return '/uploaded/'.$path.$file;
1356: } else {
1357: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1358: ': '.$fetchresult);
1359: return '/adm/notfound.html';
1360: }
1361: }
1362:
1363: sub removeuploadedurl {
1364: my ($url)=@_;
1365: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1366: return &Apache::lonnet::removeuserfile($uname,$udom,$fname);
1367: }
1368:
1369: sub removeuserfile {
1370: my ($docuname,$docudom,$fname)=@_;
1371: my $home=&homeserver($docuname,$docudom);
1372: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1373: }
1374:
1375: # ------------------------------------------------------------------------- Log
1376:
1377: sub log {
1378: my ($dom,$nam,$hom,$what)=@_;
1379: return critical("log:$dom:$nam:$what",$hom);
1380: }
1381:
1382: # ------------------------------------------------------------------ Course Log
1383: #
1384: # This routine flushes several buffers of non-mission-critical nature
1385: #
1386:
1387: sub flushcourselogs {
1388: &logthis('Flushing log buffers');
1389: #
1390: # course logs
1391: # This is a log of all transactions in a course, which can be used
1392: # for data mining purposes
1393: #
1394: # It also collects the courseid database, which lists last transaction
1395: # times and course titles for all courseids
1396: #
1397: my %courseidbuffer=();
1398: foreach (keys %courselogs) {
1399: my $crsid=$_;
1400: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1401: &escape($courselogs{$crsid}),
1402: $coursehombuf{$crsid}) eq 'ok') {
1403: delete $courselogs{$crsid};
1404: } else {
1405: &logthis('Failed to flush log buffer for '.$crsid);
1406: if (length($courselogs{$crsid})>40000) {
1407: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1408: " exceeded maximum size, deleting.</font>");
1409: delete $courselogs{$crsid};
1410: }
1411: }
1412: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1413: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1414: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1415: '='.&escape($courseinstcodebuf{$crsid});
1416: } else {
1417: $courseidbuffer{$coursehombuf{$crsid}}=
1418: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1419: '='.&escape($courseinstcodebuf{$crsid});
1420: }
1421: }
1422: #
1423: # Write course id database (reverse lookup) to homeserver of courses
1424: # Is used in pickcourse
1425: #
1426: foreach (keys %courseidbuffer) {
1427: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1428: }
1429: #
1430: # File accesses
1431: # Writes to the dynamic metadata of resources to get hit counts, etc.
1432: #
1433: foreach my $entry (keys(%accesshash)) {
1434: if ($entry =~ /___count$/) {
1435: my ($dom,$name);
1436: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1437: if (! defined($dom) || $dom eq '' ||
1438: ! defined($name) || $name eq '') {
1439: my $cid = $ENV{'request.course.id'};
1440: $dom = $ENV{'request.'.$cid.'.domain'};
1441: $name = $ENV{'request.'.$cid.'.num'};
1442: }
1443: my $value = $accesshash{$entry};
1444: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1445: my %temphash=($url => $value);
1446: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1447: if ($result eq 'ok') {
1448: delete $accesshash{$entry};
1449: } elsif ($result eq 'unknown_cmd') {
1450: # Target server has old code running on it.
1451: my %temphash=($entry => $value);
1452: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1453: delete $accesshash{$entry};
1454: }
1455: }
1456: } else {
1457: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1458: my %temphash=($entry => $accesshash{$entry});
1459: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1460: delete $accesshash{$entry};
1461: }
1462: }
1463: }
1464: #
1465: # Roles
1466: # Reverse lookup of user roles for course faculty/staff and co-authorship
1467: #
1468: foreach (keys %userrolehash) {
1469: my $entry=$_;
1470: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1471: split(/\:/,$entry);
1472: if (&Apache::lonnet::put('nohist_userroles',
1473: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1474: $rudom,$runame) eq 'ok') {
1475: delete $userrolehash{$entry};
1476: }
1477: }
1478: $dumpcount++;
1479: }
1480:
1481: sub courselog {
1482: my $what=shift;
1483: $what=time.':'.$what;
1484: unless ($ENV{'request.course.id'}) { return ''; }
1485: $coursedombuf{$ENV{'request.course.id'}}=
1486: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1487: $coursenumbuf{$ENV{'request.course.id'}}=
1488: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1489: $coursehombuf{$ENV{'request.course.id'}}=
1490: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1491: $coursedescrbuf{$ENV{'request.course.id'}}=
1492: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1493: $courseinstcodebuf{$ENV{'request.course.id'}}=
1494: $ENV{'course.'.$ENV{'request.course.id'}.'.internal.coursecode'};
1495: if (defined $courselogs{$ENV{'request.course.id'}}) {
1496: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1497: } else {
1498: $courselogs{$ENV{'request.course.id'}}.=$what;
1499: }
1500: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1501: &flushcourselogs();
1502: }
1503: }
1504:
1505: sub courseacclog {
1506: my $fnsymb=shift;
1507: unless ($ENV{'request.course.id'}) { return ''; }
1508: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1509: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1510: $what.=':POST';
1511: foreach (keys %ENV) {
1512: if ($_=~/^form\.(.*)/) {
1513: $what.=':'.$1.'='.$ENV{$_};
1514: }
1515: }
1516: }
1517: &courselog($what);
1518: }
1519:
1520: sub countacc {
1521: my $url=&declutter(shift);
1522: return if (! defined($url) || $url eq '');
1523: unless ($ENV{'request.course.id'}) { return ''; }
1524: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1525: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1526: $accesshash{$key}++;
1527: }
1528:
1529: sub linklog {
1530: my ($from,$to)=@_;
1531: $from=&declutter($from);
1532: $to=&declutter($to);
1533: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1534: $accesshash{$to.'___'.$from.'___goto'}=1;
1535: }
1536:
1537: sub userrolelog {
1538: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1539: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1540: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1541: ($trole=~/^cr/) || ($trole=~/^ta/)) {
1542: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1543: $userrolehash
1544: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1545: =$tend.':'.$tstart;
1546: }
1547: }
1548:
1549: sub get_course_adv_roles {
1550: my $cid=shift;
1551: $cid=$ENV{'request.course.id'} unless (defined($cid));
1552: my %coursehash=&coursedescription($cid);
1553: my %nothide=();
1554: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1555: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1556: }
1557: my %returnhash=();
1558: my %dumphash=
1559: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1560: my $now=time;
1561: foreach (keys %dumphash) {
1562: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1563: if (($tstart) && ($tstart<0)) { next; }
1564: if (($tend) && ($tend<$now)) { next; }
1565: if (($tstart) && ($now<$tstart)) { next; }
1566: my ($role,$username,$domain,$section)=split(/\:/,$_);
1567: if ((&privileged($username,$domain)) &&
1568: (!$nothide{$username.':'.$domain})) { next; }
1569: my $key=&plaintext($role);
1570: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1571: if ($returnhash{$key}) {
1572: $returnhash{$key}.=','.$username.':'.$domain;
1573: } else {
1574: $returnhash{$key}=$username.':'.$domain;
1575: }
1576: }
1577: return %returnhash;
1578: }
1579:
1580: sub get_my_roles {
1581: my ($uname,$udom)=@_;
1582: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1583: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1584: my %dumphash=
1585: &dump('nohist_userroles',$udom,$uname);
1586: my %returnhash=();
1587: my $now=time;
1588: foreach (keys %dumphash) {
1589: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1590: if (($tstart) && ($tstart<0)) { next; }
1591: if (($tend) && ($tend<$now)) { next; }
1592: if (($tstart) && ($now<$tstart)) { next; }
1593: my ($role,$username,$domain,$section)=split(/\:/,$_);
1594: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1595: }
1596: return %returnhash;
1597: }
1598:
1599: # ----------------------------------------------------- Frontpage Announcements
1600: #
1601: #
1602:
1603: sub postannounce {
1604: my ($server,$text)=@_;
1605: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1606: unless ($text=~/\w/) { $text=''; }
1607: return &reply('setannounce:'.&escape($text),$server);
1608: }
1609:
1610: sub getannounce {
1611:
1612: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1613: my $announcement='';
1614: while (<$fh>) { $announcement .=$_; }
1615: close($fh);
1616: if ($announcement=~/\w/) {
1617: return
1618: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1619: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1620: } else {
1621: return '';
1622: }
1623: } else {
1624: return '';
1625: }
1626: }
1627:
1628: # ---------------------------------------------------------- Course ID routines
1629: # Deal with domain's nohist_courseid.db files
1630: #
1631:
1632: sub courseidput {
1633: my ($domain,$what,$coursehome)=@_;
1634: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1635: }
1636:
1637: sub courseiddump {
1638: my ($domfilter,$descfilter,$sincefilter,$hostidflag,$hostidref)=@_;
1639: my %returnhash=();
1640: unless ($domfilter) { $domfilter=''; }
1641: foreach my $tryserver (keys %libserv) {
1642: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1643: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1644: foreach (
1645: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1646: $sincefilter.':'.&escape($descfilter),
1647: $tryserver))) {
1648: my ($key,$value)=split(/\=/,$_);
1649: if (($key) && ($value)) {
1650: $returnhash{&unescape($key)}=$value;
1651: }
1652: }
1653: }
1654: }
1655: }
1656: return %returnhash;
1657: }
1658:
1659: #
1660: # ----------------------------------------------------------- Check out an item
1661:
1662: sub get_first_access {
1663: my ($type,$argsymb)=@_;
1664: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1665: if ($argsymb) { $symb=$argsymb; }
1666: my ($map,$id,$res)=&decode_symb($symb);
1667: if ($type eq 'map') { $res=$map; }
1668: my %times=&get('firstaccesstimes',[$res],$udom,$uname);
1669: return $times{$res};
1670: }
1671:
1672: sub set_first_access {
1673: my ($type)=@_;
1674: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1675: my ($map,$id,$res)=&decode_symb($symb);
1676: if ($type eq 'map') { $res=$map; }
1677: my $firstaccess=&get_first_access($type);
1678: if (!$firstaccess) {
1679: return &put('firstaccesstimes',{$res=>time},$udom,$uname);
1680: }
1681: return 'already_set';
1682: }
1683:
1684: sub checkout {
1685: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1686: my $now=time;
1687: my $lonhost=$perlvar{'lonHostID'};
1688: my $infostr=&escape(
1689: 'CHECKOUTTOKEN&'.
1690: $tuname.'&'.
1691: $tudom.'&'.
1692: $tcrsid.'&'.
1693: $symb.'&'.
1694: $now.'&'.$ENV{'REMOTE_ADDR'});
1695: my $token=&reply('tmpput:'.$infostr,$lonhost);
1696: if ($token=~/^error\:/) {
1697: &logthis("<font color=blue>WARNING: ".
1698: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1699: "</font>");
1700: return '';
1701: }
1702:
1703: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1704: $token=~tr/a-z/A-Z/;
1705:
1706: my %infohash=('resource.0.outtoken' => $token,
1707: 'resource.0.checkouttime' => $now,
1708: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1709:
1710: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1711: return '';
1712: } else {
1713: &logthis("<font color=blue>WARNING: ".
1714: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1715: "</font>");
1716: }
1717:
1718: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1719: &escape('Checkout '.$infostr.' - '.
1720: $token)) ne 'ok') {
1721: return '';
1722: } else {
1723: &logthis("<font color=blue>WARNING: ".
1724: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1725: "</font>");
1726: }
1727: return $token;
1728: }
1729:
1730: # ------------------------------------------------------------ Check in an item
1731:
1732: sub checkin {
1733: my $token=shift;
1734: my $now=time;
1735: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1736: $lonhost=~tr/A-Z/a-z/;
1737: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1738: $dtoken=~s/\W/\_/g;
1739: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1740: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1741:
1742: unless (($tuname) && ($tudom)) {
1743: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1744: return '';
1745: }
1746:
1747: unless (&allowed('mgr',$tcrsid)) {
1748: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1749: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1750: return '';
1751: }
1752:
1753: my %infohash=('resource.0.intoken' => $token,
1754: 'resource.0.checkintime' => $now,
1755: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1756:
1757: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1758: return '';
1759: }
1760:
1761: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1762: &escape('Checkin - '.$token)) ne 'ok') {
1763: return '';
1764: }
1765:
1766: return ($symb,$tuname,$tudom,$tcrsid);
1767: }
1768:
1769: # --------------------------------------------- Set Expire Date for Spreadsheet
1770:
1771: sub expirespread {
1772: my ($uname,$udom,$stype,$usymb)=@_;
1773: my $cid=$ENV{'request.course.id'};
1774: if ($cid) {
1775: my $now=time;
1776: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1777: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1778: $ENV{'course.'.$cid.'.num'}.
1779: ':nohist_expirationdates:'.
1780: &escape($key).'='.$now,
1781: $ENV{'course.'.$cid.'.home'})
1782: }
1783: return 'ok';
1784: }
1785:
1786: # ----------------------------------------------------- Devalidate Spreadsheets
1787:
1788: sub devalidate {
1789: my ($symb,$uname,$udom)=@_;
1790: my $cid=$ENV{'request.course.id'};
1791: if ($cid) {
1792: # delete the stored spreadsheets for
1793: # - the student level sheet of this user in course's homespace
1794: # - the assessment level sheet for this resource
1795: # for this user in user's homespace
1796: my $key=$uname.':'.$udom.':';
1797: my $status=
1798: &del('nohist_calculatedsheets',
1799: [$key.'studentcalc:'],
1800: $ENV{'course.'.$cid.'.domain'},
1801: $ENV{'course.'.$cid.'.num'})
1802: .' '.
1803: &del('nohist_calculatedsheets_'.$cid,
1804: [$key.'assesscalc:'.$symb],$udom,$uname);
1805: unless ($status eq 'ok ok') {
1806: &logthis('Could not devalidate spreadsheet '.
1807: $uname.' at '.$udom.' for '.
1808: $symb.': '.$status);
1809: }
1810: }
1811: }
1812:
1813: sub get_scalar {
1814: my ($string,$end) = @_;
1815: my $value;
1816: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1817: $value = $1;
1818: } elsif ($$string =~ s/^([^&]*?)&//) {
1819: $value = $1;
1820: }
1821: return &unescape($value);
1822: }
1823:
1824: sub array2str {
1825: my (@array) = @_;
1826: my $result=&arrayref2str(\@array);
1827: $result=~s/^__ARRAY_REF__//;
1828: $result=~s/__END_ARRAY_REF__$//;
1829: return $result;
1830: }
1831:
1832: sub arrayref2str {
1833: my ($arrayref) = @_;
1834: my $result='__ARRAY_REF__';
1835: foreach my $elem (@$arrayref) {
1836: if(ref($elem) eq 'ARRAY') {
1837: $result.=&arrayref2str($elem).'&';
1838: } elsif(ref($elem) eq 'HASH') {
1839: $result.=&hashref2str($elem).'&';
1840: } elsif(ref($elem)) {
1841: #print("Got a ref of ".(ref($elem))." skipping.");
1842: } else {
1843: $result.=&escape($elem).'&';
1844: }
1845: }
1846: $result=~s/\&$//;
1847: $result .= '__END_ARRAY_REF__';
1848: return $result;
1849: }
1850:
1851: sub hash2str {
1852: my (%hash) = @_;
1853: my $result=&hashref2str(\%hash);
1854: $result=~s/^__HASH_REF__//;
1855: $result=~s/__END_HASH_REF__$//;
1856: return $result;
1857: }
1858:
1859: sub hashref2str {
1860: my ($hashref)=@_;
1861: my $result='__HASH_REF__';
1862: foreach (sort(keys(%$hashref))) {
1863: if (ref($_) eq 'ARRAY') {
1864: $result.=&arrayref2str($_).'=';
1865: } elsif (ref($_) eq 'HASH') {
1866: $result.=&hashref2str($_).'=';
1867: } elsif (ref($_)) {
1868: $result.='=';
1869: #print("Got a ref of ".(ref($_))." skipping.");
1870: } else {
1871: if ($_) {$result.=&escape($_).'=';} else { last; }
1872: }
1873:
1874: if(ref($hashref->{$_}) eq 'ARRAY') {
1875: $result.=&arrayref2str($hashref->{$_}).'&';
1876: } elsif(ref($hashref->{$_}) eq 'HASH') {
1877: $result.=&hashref2str($hashref->{$_}).'&';
1878: } elsif(ref($hashref->{$_})) {
1879: $result.='&';
1880: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1881: } else {
1882: $result.=&escape($hashref->{$_}).'&';
1883: }
1884: }
1885: $result=~s/\&$//;
1886: $result .= '__END_HASH_REF__';
1887: return $result;
1888: }
1889:
1890: sub str2hash {
1891: my ($string)=@_;
1892: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1893: return %$hash;
1894: }
1895:
1896: sub str2hashref {
1897: my ($string) = @_;
1898:
1899: my %hash;
1900:
1901: if($string !~ /^__HASH_REF__/) {
1902: if (! ($string eq '' || !defined($string))) {
1903: $hash{'error'}='Not hash reference';
1904: }
1905: return (\%hash, $string);
1906: }
1907:
1908: $string =~ s/^__HASH_REF__//;
1909:
1910: while($string !~ /^__END_HASH_REF__/) {
1911: #key
1912: my $key='';
1913: if($string =~ /^__HASH_REF__/) {
1914: ($key, $string)=&str2hashref($string);
1915: if(defined($key->{'error'})) {
1916: $hash{'error'}='Bad data';
1917: return (\%hash, $string);
1918: }
1919: } elsif($string =~ /^__ARRAY_REF__/) {
1920: ($key, $string)=&str2arrayref($string);
1921: if($key->[0] eq 'Array reference error') {
1922: $hash{'error'}='Bad data';
1923: return (\%hash, $string);
1924: }
1925: } else {
1926: $string =~ s/^(.*?)=//;
1927: $key=&unescape($1);
1928: }
1929: $string =~ s/^=//;
1930:
1931: #value
1932: my $value='';
1933: if($string =~ /^__HASH_REF__/) {
1934: ($value, $string)=&str2hashref($string);
1935: if(defined($value->{'error'})) {
1936: $hash{'error'}='Bad data';
1937: return (\%hash, $string);
1938: }
1939: } elsif($string =~ /^__ARRAY_REF__/) {
1940: ($value, $string)=&str2arrayref($string);
1941: if($value->[0] eq 'Array reference error') {
1942: $hash{'error'}='Bad data';
1943: return (\%hash, $string);
1944: }
1945: } else {
1946: $value=&get_scalar(\$string,'__END_HASH_REF__');
1947: }
1948: $string =~ s/^&//;
1949:
1950: $hash{$key}=$value;
1951: }
1952:
1953: $string =~ s/^__END_HASH_REF__//;
1954:
1955: return (\%hash, $string);
1956: }
1957:
1958: sub str2array {
1959: my ($string)=@_;
1960: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1961: return @$array;
1962: }
1963:
1964: sub str2arrayref {
1965: my ($string) = @_;
1966: my @array;
1967:
1968: if($string !~ /^__ARRAY_REF__/) {
1969: if (! ($string eq '' || !defined($string))) {
1970: $array[0]='Array reference error';
1971: }
1972: return (\@array, $string);
1973: }
1974:
1975: $string =~ s/^__ARRAY_REF__//;
1976:
1977: while($string !~ /^__END_ARRAY_REF__/) {
1978: my $value='';
1979: if($string =~ /^__HASH_REF__/) {
1980: ($value, $string)=&str2hashref($string);
1981: if(defined($value->{'error'})) {
1982: $array[0] ='Array reference error';
1983: return (\@array, $string);
1984: }
1985: } elsif($string =~ /^__ARRAY_REF__/) {
1986: ($value, $string)=&str2arrayref($string);
1987: if($value->[0] eq 'Array reference error') {
1988: $array[0] ='Array reference error';
1989: return (\@array, $string);
1990: }
1991: } else {
1992: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1993: }
1994: $string =~ s/^&//;
1995:
1996: push(@array, $value);
1997: }
1998:
1999: $string =~ s/^__END_ARRAY_REF__//;
2000:
2001: return (\@array, $string);
2002: }
2003:
2004: # -------------------------------------------------------------------Temp Store
2005:
2006: sub tmpreset {
2007: my ($symb,$namespace,$domain,$stuname) = @_;
2008: if (!$symb) {
2009: $symb=&symbread();
2010: if (!$symb) { $symb= $ENV{'request.url'}; }
2011: }
2012: $symb=escape($symb);
2013:
2014: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2015: $namespace=~s/\//\_/g;
2016: $namespace=~s/\W//g;
2017:
2018: #FIXME needs to do something for /pub resources
2019: if (!$domain) { $domain=$ENV{'user.domain'}; }
2020: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2021: my $path=$perlvar{'lonDaemons'}.'/tmp';
2022: my %hash;
2023: if (tie(%hash,'GDBM_File',
2024: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2025: &GDBM_WRCREAT(),0640)) {
2026: foreach my $key (keys %hash) {
2027: if ($key=~ /:$symb/) {
2028: delete($hash{$key});
2029: }
2030: }
2031: }
2032: }
2033:
2034: sub tmpstore {
2035: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2036:
2037: if (!$symb) {
2038: $symb=&symbread();
2039: if (!$symb) { $symb= $ENV{'request.url'}; }
2040: }
2041: $symb=escape($symb);
2042:
2043: if (!$namespace) {
2044: # I don't think we would ever want to store this for a course.
2045: # it seems this will only be used if we don't have a course.
2046: #$namespace=$ENV{'request.course.id'};
2047: #if (!$namespace) {
2048: $namespace=$ENV{'request.state'};
2049: #}
2050: }
2051: $namespace=~s/\//\_/g;
2052: $namespace=~s/\W//g;
2053: #FIXME needs to do something for /pub resources
2054: if (!$domain) { $domain=$ENV{'user.domain'}; }
2055: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2056: my $now=time;
2057: my %hash;
2058: my $path=$perlvar{'lonDaemons'}.'/tmp';
2059: if (tie(%hash,'GDBM_File',
2060: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2061: &GDBM_WRCREAT(),0640)) {
2062: $hash{"version:$symb"}++;
2063: my $version=$hash{"version:$symb"};
2064: my $allkeys='';
2065: foreach my $key (keys(%$storehash)) {
2066: $allkeys.=$key.':';
2067: $hash{"$version:$symb:$key"}=$$storehash{$key};
2068: }
2069: $hash{"$version:$symb:timestamp"}=$now;
2070: $allkeys.='timestamp';
2071: $hash{"$version:keys:$symb"}=$allkeys;
2072: if (untie(%hash)) {
2073: return 'ok';
2074: } else {
2075: return "error:$!";
2076: }
2077: } else {
2078: return "error:$!";
2079: }
2080: }
2081:
2082: # -----------------------------------------------------------------Temp Restore
2083:
2084: sub tmprestore {
2085: my ($symb,$namespace,$domain,$stuname) = @_;
2086:
2087: if (!$symb) {
2088: $symb=&symbread();
2089: if (!$symb) { $symb= $ENV{'request.url'}; }
2090: }
2091: $symb=escape($symb);
2092:
2093: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2094: #FIXME needs to do something for /pub resources
2095: if (!$domain) { $domain=$ENV{'user.domain'}; }
2096: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2097:
2098: my %returnhash;
2099: $namespace=~s/\//\_/g;
2100: $namespace=~s/\W//g;
2101: my %hash;
2102: my $path=$perlvar{'lonDaemons'}.'/tmp';
2103: if (tie(%hash,'GDBM_File',
2104: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2105: &GDBM_READER(),0640)) {
2106: my $version=$hash{"version:$symb"};
2107: $returnhash{'version'}=$version;
2108: my $scope;
2109: for ($scope=1;$scope<=$version;$scope++) {
2110: my $vkeys=$hash{"$scope:keys:$symb"};
2111: my @keys=split(/:/,$vkeys);
2112: my $key;
2113: $returnhash{"$scope:keys"}=$vkeys;
2114: foreach $key (@keys) {
2115: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
2116: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
2117: }
2118: }
2119: if (!(untie(%hash))) {
2120: return "error:$!";
2121: }
2122: } else {
2123: return "error:$!";
2124: }
2125: return %returnhash;
2126: }
2127:
2128: # ----------------------------------------------------------------------- Store
2129:
2130: sub store {
2131: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2132: my $home='';
2133:
2134: if ($stuname) { $home=&homeserver($stuname,$domain); }
2135:
2136: $symb=&symbclean($symb);
2137: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2138:
2139: if (!$domain) { $domain=$ENV{'user.domain'}; }
2140: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2141:
2142: &devalidate($symb,$stuname,$domain);
2143:
2144: $symb=escape($symb);
2145: if (!$namespace) {
2146: unless ($namespace=$ENV{'request.course.id'}) {
2147: return '';
2148: }
2149: }
2150: if (!$home) { $home=$ENV{'user.home'}; }
2151:
2152: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2153: $$storehash{'host'}=$perlvar{'lonHostID'};
2154:
2155: my $namevalue='';
2156: foreach (keys %$storehash) {
2157: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2158: }
2159: $namevalue=~s/\&$//;
2160: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2161: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2162: }
2163:
2164: # -------------------------------------------------------------- Critical Store
2165:
2166: sub cstore {
2167: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2168: my $home='';
2169:
2170: if ($stuname) { $home=&homeserver($stuname,$domain); }
2171:
2172: $symb=&symbclean($symb);
2173: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2174:
2175: if (!$domain) { $domain=$ENV{'user.domain'}; }
2176: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2177:
2178: &devalidate($symb,$stuname,$domain);
2179:
2180: $symb=escape($symb);
2181: if (!$namespace) {
2182: unless ($namespace=$ENV{'request.course.id'}) {
2183: return '';
2184: }
2185: }
2186: if (!$home) { $home=$ENV{'user.home'}; }
2187:
2188: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2189: $$storehash{'host'}=$perlvar{'lonHostID'};
2190:
2191: my $namevalue='';
2192: foreach (keys %$storehash) {
2193: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2194: }
2195: $namevalue=~s/\&$//;
2196: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2197: return critical
2198: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2199: }
2200:
2201: # --------------------------------------------------------------------- Restore
2202:
2203: sub restore {
2204: my ($symb,$namespace,$domain,$stuname) = @_;
2205: my $home='';
2206:
2207: if ($stuname) { $home=&homeserver($stuname,$domain); }
2208:
2209: if (!$symb) {
2210: unless ($symb=escape(&symbread())) { return ''; }
2211: } else {
2212: $symb=&escape(&symbclean($symb));
2213: }
2214: if (!$namespace) {
2215: unless ($namespace=$ENV{'request.course.id'}) {
2216: return '';
2217: }
2218: }
2219: if (!$domain) { $domain=$ENV{'user.domain'}; }
2220: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2221: if (!$home) { $home=$ENV{'user.home'}; }
2222: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2223:
2224: my %returnhash=();
2225: foreach (split(/\&/,$answer)) {
2226: my ($name,$value)=split(/\=/,$_);
2227: $returnhash{&unescape($name)}=&unescape($value);
2228: }
2229: my $version;
2230: for ($version=1;$version<=$returnhash{'version'};$version++) {
2231: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2232: $returnhash{$_}=$returnhash{$version.':'.$_};
2233: }
2234: }
2235: return %returnhash;
2236: }
2237:
2238: # ---------------------------------------------------------- Course Description
2239:
2240: sub coursedescription {
2241: my $courseid=shift;
2242: $courseid=~s/^\///;
2243: $courseid=~s/\_/\//g;
2244: my ($cdomain,$cnum)=split(/\//,$courseid);
2245: my $chome=&homeserver($cnum,$cdomain);
2246: my $normalid=$cdomain.'_'.$cnum;
2247: # need to always cache even if we get errors otherwise we keep
2248: # trying and trying and trying to get the course description.
2249: my %envhash=();
2250: my %returnhash=();
2251: $envhash{'course.'.$normalid.'.last_cache'}=time;
2252: if ($chome ne 'no_host') {
2253: %returnhash=&dump('environment',$cdomain,$cnum);
2254: if (!exists($returnhash{'con_lost'})) {
2255: $returnhash{'home'}= $chome;
2256: $returnhash{'domain'} = $cdomain;
2257: $returnhash{'num'} = $cnum;
2258: while (my ($name,$value) = each %returnhash) {
2259: $envhash{'course.'.$normalid.'.'.$name}=$value;
2260: }
2261: $returnhash{'url'}=&clutter($returnhash{'url'});
2262: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2263: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
2264: $envhash{'course.'.$normalid.'.home'}=$chome;
2265: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2266: $envhash{'course.'.$normalid.'.num'}=$cnum;
2267: }
2268: }
2269: &appenv(%envhash);
2270: return %returnhash;
2271: }
2272:
2273: # -------------------------------------------------See if a user is privileged
2274:
2275: sub privileged {
2276: my ($username,$domain)=@_;
2277: my $rolesdump=&reply("dump:$domain:$username:roles",
2278: &homeserver($username,$domain));
2279: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2280: my $now=time;
2281: if ($rolesdump ne '') {
2282: foreach (split(/&/,$rolesdump)) {
2283: if ($_!~/^rolesdef\&/) {
2284: my ($area,$role)=split(/=/,$_);
2285: $area=~s/\_\w\w$//;
2286: my ($trole,$tend,$tstart)=split(/_/,$role);
2287: if (($trole eq 'dc') || ($trole eq 'su')) {
2288: my $active=1;
2289: if ($tend) {
2290: if ($tend<$now) { $active=0; }
2291: }
2292: if ($tstart) {
2293: if ($tstart>$now) { $active=0; }
2294: }
2295: if ($active) { return 1; }
2296: }
2297: }
2298: }
2299: }
2300: return 0;
2301: }
2302:
2303: # -------------------------------------------------------- Get user privileges
2304:
2305: sub rolesinit {
2306: my ($domain,$username,$authhost)=@_;
2307: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2308: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2309: my %allroles=();
2310: my %thesepriv=();
2311: my $now=time;
2312: my $userroles="user.login.time=$now\n";
2313: my $thesestr;
2314:
2315: if ($rolesdump ne '') {
2316: foreach (split(/&/,$rolesdump)) {
2317: if ($_!~/^rolesdef\&/) {
2318: my ($area,$role)=split(/=/,$_);
2319: $area=~s/\_\w\w$//;
2320: my ($trole,$tend,$tstart)=split(/_/,$role);
2321: $userroles.='user.role.'.$trole.'.'.$area.'='.
2322: $tstart.'.'.$tend."\n";
2323: # log the associated role with the area
2324: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2325: if ($tend!=0) {
2326: if ($tend<$now) {
2327: $trole='';
2328: }
2329: }
2330: if ($tstart!=0) {
2331: if ($tstart>$now) {
2332: $trole='';
2333: }
2334: }
2335: if (($area ne '') && ($trole ne '')) {
2336: my $spec=$trole.'.'.$area;
2337: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2338: if ($trole =~ /^cr\//) {
2339: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2340: my $homsvr=homeserver($rauthor,$rdomain);
2341: if ($hostname{$homsvr} ne '') {
2342: my ($rdummy,$roledef)=
2343: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2344:
2345: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2346: my ($syspriv,$dompriv,$coursepriv)=
2347: split(/\_/,$roledef);
2348: if (defined($syspriv)) {
2349: $allroles{'cm./'}.=':'.$syspriv;
2350: $allroles{$spec.'./'}.=':'.$syspriv;
2351: }
2352: if ($tdomain ne '') {
2353: if (defined($dompriv)) {
2354: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2355: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2356: }
2357: if ($trest ne '') {
2358: if (defined($coursepriv)) {
2359: $allroles{'cm.'.$area}.=':'.$coursepriv;
2360: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
2361: }
2362: }
2363: }
2364: }
2365: }
2366: } else {
2367: if (defined($pr{$trole.':s'})) {
2368: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
2369: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2370: }
2371: if ($tdomain ne '') {
2372: if (defined($pr{$trole.':d'})) {
2373: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2374: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2375: }
2376: if ($trest ne '') {
2377: if (defined($pr{$trole.':c'})) {
2378: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2379: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2380: }
2381: }
2382: }
2383: }
2384: }
2385: }
2386: }
2387: my $adv=0;
2388: my $author=0;
2389: foreach (keys %allroles) {
2390: %thesepriv=();
2391: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
2392: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2393: foreach (split(/:/,$allroles{$_})) {
2394: if ($_ ne '') {
2395: my ($privilege,$restrictions)=split(/&/,$_);
2396: if ($restrictions eq '') {
2397: $thesepriv{$privilege}='F';
2398: } else {
2399: if ($thesepriv{$privilege} ne 'F') {
2400: $thesepriv{$privilege}.=$restrictions;
2401: }
2402: }
2403: }
2404: }
2405: $thesestr='';
2406: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2407: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
2408: }
2409: $userroles.='user.adv='.$adv."\n".
2410: 'user.author='.$author."\n";
2411: $ENV{'user.adv'}=$adv;
2412: }
2413: return $userroles;
2414: }
2415:
2416: # --------------------------------------------------------------- get interface
2417:
2418: sub get {
2419: my ($namespace,$storearr,$udomain,$uname)=@_;
2420: my $items='';
2421: foreach (@$storearr) {
2422: $items.=escape($_).'&';
2423: }
2424: $items=~s/\&$//;
2425: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2426: if (!$uname) { $uname=$ENV{'user.name'}; }
2427: my $uhome=&homeserver($uname,$udomain);
2428:
2429: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2430: my @pairs=split(/\&/,$rep);
2431: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2432: return @pairs;
2433: }
2434: my %returnhash=();
2435: my $i=0;
2436: foreach (@$storearr) {
2437: $returnhash{$_}=unescape($pairs[$i]);
2438: $i++;
2439: }
2440: return %returnhash;
2441: }
2442:
2443: # --------------------------------------------------------------- del interface
2444:
2445: sub del {
2446: my ($namespace,$storearr,$udomain,$uname)=@_;
2447: my $items='';
2448: foreach (@$storearr) {
2449: $items.=escape($_).'&';
2450: }
2451: $items=~s/\&$//;
2452: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2453: if (!$uname) { $uname=$ENV{'user.name'}; }
2454: my $uhome=&homeserver($uname,$udomain);
2455:
2456: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2457: }
2458:
2459: # -------------------------------------------------------------- dump interface
2460:
2461: sub dump {
2462: my ($namespace,$udomain,$uname,$regexp)=@_;
2463: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2464: if (!$uname) { $uname=$ENV{'user.name'}; }
2465: my $uhome=&homeserver($uname,$udomain);
2466: if ($regexp) {
2467: $regexp=&escape($regexp);
2468: } else {
2469: $regexp='.';
2470: }
2471: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2472: my @pairs=split(/\&/,$rep);
2473: my %returnhash=();
2474: foreach (@pairs) {
2475: my ($key,$value)=split(/=/,$_);
2476: $returnhash{unescape($key)}=unescape($value);
2477: }
2478: return %returnhash;
2479: }
2480:
2481: # -------------------------------------------------------------- keys interface
2482:
2483: sub getkeys {
2484: my ($namespace,$udomain,$uname)=@_;
2485: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2486: if (!$uname) { $uname=$ENV{'user.name'}; }
2487: my $uhome=&homeserver($uname,$udomain);
2488: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2489: my @keyarray=();
2490: foreach (split(/\&/,$rep)) {
2491: push (@keyarray,&unescape($_));
2492: }
2493: return @keyarray;
2494: }
2495:
2496: # --------------------------------------------------------------- currentdump
2497: sub currentdump {
2498: my ($courseid,$sdom,$sname)=@_;
2499: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2500: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2501: $sname = $ENV{'user.name'} if (! defined($sname));
2502: my $uhome = &homeserver($sname,$sdom);
2503: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2504: return if ($rep =~ /^(error:|no_such_host)/);
2505: #
2506: my %returnhash=();
2507: #
2508: if ($rep eq "unknown_cmd") {
2509: # an old lond will not know currentdump
2510: # Do a dump and make it look like a currentdump
2511: my @tmp = &dump($courseid,$sdom,$sname,'.');
2512: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2513: my %hash = @tmp;
2514: @tmp=();
2515: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2516: } else {
2517: my @pairs=split(/\&/,$rep);
2518: foreach (@pairs) {
2519: my ($key,$value)=split(/=/,$_);
2520: my ($symb,$param) = split(/:/,$key);
2521: $returnhash{&unescape($symb)}->{&unescape($param)} =
2522: &unescape($value);
2523: }
2524: }
2525: return %returnhash;
2526: }
2527:
2528: sub convert_dump_to_currentdump{
2529: my %hash = %{shift()};
2530: my %returnhash;
2531: # Code ripped from lond, essentially. The only difference
2532: # here is the unescaping done by lonnet::dump(). Conceivably
2533: # we might run in to problems with parameter names =~ /^v\./
2534: while (my ($key,$value) = each(%hash)) {
2535: my ($v,$symb,$param) = split(/:/,$key);
2536: next if ($v eq 'version' || $symb eq 'keys');
2537: next if (exists($returnhash{$symb}) &&
2538: exists($returnhash{$symb}->{$param}) &&
2539: $returnhash{$symb}->{'v.'.$param} > $v);
2540: $returnhash{$symb}->{$param}=$value;
2541: $returnhash{$symb}->{'v.'.$param}=$v;
2542: }
2543: #
2544: # Remove all of the keys in the hashes which keep track of
2545: # the version of the parameter.
2546: while (my ($symb,$param_hash) = each(%returnhash)) {
2547: # use a foreach because we are going to delete from the hash.
2548: foreach my $key (keys(%$param_hash)) {
2549: delete($param_hash->{$key}) if ($key =~ /^v\./);
2550: }
2551: }
2552: return \%returnhash;
2553: }
2554:
2555: # --------------------------------------------------------------- inc interface
2556:
2557: sub inc {
2558: my ($namespace,$store,$udomain,$uname) = @_;
2559: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2560: if (!$uname) { $uname=$ENV{'user.name'}; }
2561: my $uhome=&homeserver($uname,$udomain);
2562: my $items='';
2563: if (! ref($store)) {
2564: # got a single value, so use that instead
2565: $items = &escape($store).'=&';
2566: } elsif (ref($store) eq 'SCALAR') {
2567: $items = &escape($$store).'=&';
2568: } elsif (ref($store) eq 'ARRAY') {
2569: $items = join('=&',map {&escape($_);} @{$store});
2570: } elsif (ref($store) eq 'HASH') {
2571: while (my($key,$value) = each(%{$store})) {
2572: $items.= &escape($key).'='.&escape($value).'&';
2573: }
2574: }
2575: $items=~s/\&$//;
2576: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2577: }
2578:
2579: # --------------------------------------------------------------- put interface
2580:
2581: sub put {
2582: my ($namespace,$storehash,$udomain,$uname)=@_;
2583: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2584: if (!$uname) { $uname=$ENV{'user.name'}; }
2585: my $uhome=&homeserver($uname,$udomain);
2586: my $items='';
2587: foreach (keys %$storehash) {
2588: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
2589: }
2590: $items=~s/\&$//;
2591: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2592: }
2593:
2594: # ---------------------------------------------------------- putstore interface
2595:
2596: sub putstore {
2597: my ($namespace,$storehash,$udomain,$uname)=@_;
2598: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2599: if (!$uname) { $uname=$ENV{'user.name'}; }
2600: my $uhome=&homeserver($uname,$udomain);
2601: my $items='';
2602: my %allitems = ();
2603: foreach (keys %$storehash) {
2604: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
2605: my $key = $1.':keys:'.$2;
2606: $allitems{$key} .= $3.':';
2607: }
2608: $items.=$_.'='.&escape($$storehash{$_}).'&';
2609: }
2610: foreach (keys %allitems) {
2611: $allitems{$_} =~ s/\:$//;
2612: $items.= $_.'='.$allitems{$_}.'&';
2613: }
2614: $items=~s/\&$//;
2615: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2616: }
2617:
2618: # ------------------------------------------------------ critical put interface
2619:
2620: sub cput {
2621: my ($namespace,$storehash,$udomain,$uname)=@_;
2622: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2623: if (!$uname) { $uname=$ENV{'user.name'}; }
2624: my $uhome=&homeserver($uname,$udomain);
2625: my $items='';
2626: foreach (keys %$storehash) {
2627: $items.=escape($_).'='.escape($$storehash{$_}).'&';
2628: }
2629: $items=~s/\&$//;
2630: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2631: }
2632:
2633: # -------------------------------------------------------------- eget interface
2634:
2635: sub eget {
2636: my ($namespace,$storearr,$udomain,$uname)=@_;
2637: my $items='';
2638: foreach (@$storearr) {
2639: $items.=escape($_).'&';
2640: }
2641: $items=~s/\&$//;
2642: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2643: if (!$uname) { $uname=$ENV{'user.name'}; }
2644: my $uhome=&homeserver($uname,$udomain);
2645: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2646: my @pairs=split(/\&/,$rep);
2647: my %returnhash=();
2648: my $i=0;
2649: foreach (@$storearr) {
2650: $returnhash{$_}=unescape($pairs[$i]);
2651: $i++;
2652: }
2653: return %returnhash;
2654: }
2655:
2656: # ---------------------------------------------- Custom access rule evaluation
2657:
2658: sub customaccess {
2659: my ($priv,$uri)=@_;
2660: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2661: $urealm=~s/^\W//;
2662: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2663: my $access=0;
2664: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2665: my ($effect,$realm,$role)=split(/\:/,$_);
2666: if ($role) {
2667: if ($role ne $urole) { next; }
2668: }
2669: foreach (split(/\s*\,\s*/,$realm)) {
2670: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2671: if ($tdom) {
2672: if ($tdom ne $udom) { next; }
2673: }
2674: if ($tcrs) {
2675: if ($tcrs ne $ucrs) { next; }
2676: }
2677: if ($tsec) {
2678: if ($tsec ne $usec) { next; }
2679: }
2680: $access=($effect eq 'allow');
2681: last;
2682: }
2683: if ($realm eq '' && $role eq '') {
2684: $access=($effect eq 'allow');
2685: }
2686: }
2687: return $access;
2688: }
2689:
2690: # ------------------------------------------------- Check for a user privilege
2691:
2692: sub allowed {
2693: my ($priv,$uri)=@_;
2694: $uri=&deversion($uri);
2695: my $orguri=$uri;
2696: $uri=&declutter($uri);
2697:
2698: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
2699: # Free bre access to adm and meta resources
2700:
2701: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2702: return 'F';
2703: }
2704:
2705: # Free bre to public access
2706:
2707: if ($priv eq 'bre') {
2708: my $copyright=&metadata($uri,'copyright');
2709: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2710: return 'F';
2711: }
2712: if ($copyright eq 'priv') {
2713: $uri=~/([^\/]+)\/([^\/]+)\//;
2714: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2715: return '';
2716: }
2717: }
2718: if ($copyright eq 'domain') {
2719: $uri=~/([^\/]+)\/([^\/]+)\//;
2720: unless (($ENV{'user.domain'} eq $1) ||
2721: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2722: return '';
2723: }
2724: }
2725: if ($ENV{'request.role'}=~ /li\.\//) {
2726: # Library role, so allow browsing of resources in this domain.
2727: return 'F';
2728: }
2729: if ($copyright eq 'custom') {
2730: unless (&customaccess($priv,$uri)) { return ''; }
2731: }
2732: }
2733: # Domain coordinator is trying to create a course
2734: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2735: # uri is the requested domain in this case.
2736: # comparison to 'request.role.domain' shows if the user has selected
2737: # a role of dc for the domain in question.
2738: return 'F' if ($uri eq $ENV{'request.role.domain'});
2739: }
2740:
2741: my $thisallowed='';
2742: my $statecond=0;
2743: my $courseprivid='';
2744:
2745: # Course
2746:
2747: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
2748: $thisallowed.=$1;
2749: }
2750:
2751: # Domain
2752:
2753: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2754: =~/\Q$priv\E\&([^\:]*)/) {
2755: $thisallowed.=$1;
2756: }
2757:
2758: # Course: uri itself is a course
2759: my $courseuri=$uri;
2760: $courseuri=~s/\_(\d)/\/$1/;
2761: $courseuri=~s/^([^\/])/\/$1/;
2762:
2763: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2764: =~/\Q$priv\E\&([^\:]*)/) {
2765: $thisallowed.=$1;
2766: }
2767:
2768: # URI is an uploaded document for this course
2769:
2770: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
2771: my $refuri=$ENV{'httpref.'.$orguri};
2772: if ($refuri) {
2773: if ($refuri =~ m|^/adm/|) {
2774: $thisallowed='F';
2775: }
2776: }
2777: }
2778:
2779: # Full access at system, domain or course-wide level? Exit.
2780:
2781: if ($thisallowed=~/F/) {
2782: return 'F';
2783: }
2784:
2785: # If this is generating or modifying users, exit with special codes
2786:
2787: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:\Q$priv\E\:/) {
2788: return $thisallowed;
2789: }
2790: #
2791: # Gathered so far: system, domain and course wide privileges
2792: #
2793: # Course: See if uri or referer is an individual resource that is part of
2794: # the course
2795:
2796: if ($ENV{'request.course.id'}) {
2797:
2798: $courseprivid=$ENV{'request.course.id'};
2799: if ($ENV{'request.course.sec'}) {
2800: $courseprivid.='/'.$ENV{'request.course.sec'};
2801: }
2802: $courseprivid=~s/\_/\//;
2803: my $checkreferer=1;
2804: my ($match,$cond)=&is_on_map($uri);
2805: if ($match) {
2806: $statecond=$cond;
2807: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2808: =~/\Q$priv\E\&([^\:]*)/) {
2809: $thisallowed.=$1;
2810: $checkreferer=0;
2811: }
2812: }
2813:
2814: if ($checkreferer) {
2815: my $refuri=$ENV{'httpref.'.$orguri};
2816: unless ($refuri) {
2817: foreach (keys %ENV) {
2818: if ($_=~/^httpref\..*\*/) {
2819: my $pattern=$_;
2820: $pattern=~s/^httpref\.\/res\///;
2821: $pattern=~s/\*/\[\^\/\]\+/g;
2822: $pattern=~s/\//\\\//g;
2823: if ($orguri=~/$pattern/) {
2824: $refuri=$ENV{$_};
2825: }
2826: }
2827: }
2828: }
2829:
2830: if ($refuri) {
2831: $refuri=&declutter($refuri);
2832: my ($match,$cond)=&is_on_map($refuri);
2833: if ($match) {
2834: my $refstatecond=$cond;
2835: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2836: =~/\Q$priv\E\&([^\:]*)/) {
2837: $thisallowed.=$1;
2838: $uri=$refuri;
2839: $statecond=$refstatecond;
2840: }
2841: }
2842: }
2843: }
2844: }
2845:
2846: #
2847: # Gathered now: all privileges that could apply, and condition number
2848: #
2849: #
2850: # Full or no access?
2851: #
2852:
2853: if ($thisallowed=~/F/) {
2854: return 'F';
2855: }
2856:
2857: unless ($thisallowed) {
2858: return '';
2859: }
2860:
2861: # Restrictions exist, deal with them
2862: #
2863: # C:according to course preferences
2864: # R:according to resource settings
2865: # L:unless locked
2866: # X:according to user session state
2867: #
2868:
2869: # Possibly locked functionality, check all courses
2870: # Locks might take effect only after 10 minutes cache expiration for other
2871: # courses, and 2 minutes for current course
2872:
2873: my $envkey;
2874: if ($thisallowed=~/L/) {
2875: foreach $envkey (keys %ENV) {
2876: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2877: my $courseid=$2;
2878: my $roleid=$1.'.'.$2;
2879: $courseid=~s/^\///;
2880: my $expiretime=600;
2881: if ($ENV{'request.role'} eq $roleid) {
2882: $expiretime=120;
2883: }
2884: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2885: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2886: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2887: &coursedescription($courseid);
2888: }
2889: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
2890: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2891: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2892: &log($ENV{'user.domain'},$ENV{'user.name'},
2893: $ENV{'user.home'},
2894: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2895: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2896: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2897: return '';
2898: }
2899: }
2900: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
2901: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2902: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2903: &log($ENV{'user.domain'},$ENV{'user.name'},
2904: $ENV{'user.home'},
2905: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2906: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2907: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2908: return '';
2909: }
2910: }
2911: }
2912: }
2913: }
2914:
2915: #
2916: # Rest of the restrictions depend on selected course
2917: #
2918:
2919: unless ($ENV{'request.course.id'}) {
2920: return '1';
2921: }
2922:
2923: #
2924: # Now user is definitely in a course
2925: #
2926:
2927:
2928: # Course preferences
2929:
2930: if ($thisallowed=~/C/) {
2931: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2932: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2933: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2934: =~/\Q$rolecode\E/) {
2935: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2936: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2937: $ENV{'request.course.id'});
2938: return '';
2939: }
2940:
2941: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2942: =~/\Q$unamedom\E/) {
2943: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2944: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2945: $ENV{'request.course.id'});
2946: return '';
2947: }
2948: }
2949:
2950: # Resource preferences
2951:
2952: if ($thisallowed=~/R/) {
2953: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2954: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
2955: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2956: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2957: return '';
2958: }
2959: }
2960:
2961: # Restricted by state or randomout?
2962:
2963: if ($thisallowed=~/X/) {
2964: if ($ENV{'acc.randomout'}) {
2965: my $symb=&symbread($uri,1);
2966: if (($symb) && ($ENV{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
2967: return '';
2968: }
2969: }
2970: if (&condval($statecond)) {
2971: return '2';
2972: } else {
2973: return '';
2974: }
2975: }
2976:
2977: return 'F';
2978: }
2979:
2980: # --------------------------------------------------- Is a resource on the map?
2981:
2982: sub is_on_map {
2983: my $uri=&declutter(shift);
2984: $uri=~s/\.\d+\.(\w+)$/\.$1/;
2985: my @uriparts=split(/\//,$uri);
2986: my $filename=$uriparts[$#uriparts];
2987: my $pathname=$uri;
2988: $pathname=~s|/\Q$filename\E$||;
2989: $pathname=~s/^adm\/wrapper\///;
2990: #Trying to find the conditional for the file
2991: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2992: /\&\Q$filename\E\:([\d\|]+)\&/);
2993: if ($match) {
2994: return (1,$1);
2995: } else {
2996: return (0,0);
2997: }
2998: }
2999:
3000: # --------------------------------------------------------- Get symb from alias
3001:
3002: sub get_symb_from_alias {
3003: my $symb=shift;
3004: my ($map,$resid,$url)=&decode_symb($symb);
3005: # Already is a symb
3006: if ($url) { return $symb; }
3007: # Must be an alias
3008: my $aliassymb='';
3009: my %bighash;
3010: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3011: &GDBM_READER(),0640)) {
3012: my $rid=$bighash{'mapalias_'.$symb};
3013: if ($rid) {
3014: my ($mapid,$resid)=split(/\./,$rid);
3015: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3016: $resid,$bighash{'src_'.$rid});
3017: }
3018: untie %bighash;
3019: }
3020: return $aliassymb;
3021: }
3022:
3023: # ----------------------------------------------------------------- Define Role
3024:
3025: sub definerole {
3026: if (allowed('mcr','/')) {
3027: my ($rolename,$sysrole,$domrole,$courole)=@_;
3028: foreach (split(':',$sysrole)) {
3029: my ($crole,$cqual)=split(/\&/,$_);
3030: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3031: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3032: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3033: return "refused:s:$crole&$cqual";
3034: }
3035: }
3036: }
3037: foreach (split(':',$domrole)) {
3038: my ($crole,$cqual)=split(/\&/,$_);
3039: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3040: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3041: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3042: return "refused:d:$crole&$cqual";
3043: }
3044: }
3045: }
3046: foreach (split(':',$courole)) {
3047: my ($crole,$cqual)=split(/\&/,$_);
3048: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3049: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3050: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3051: return "refused:c:$crole&$cqual";
3052: }
3053: }
3054: }
3055: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3056: "$ENV{'user.domain'}:$ENV{'user.name'}:".
3057: "rolesdef_$rolename=".
3058: escape($sysrole.'_'.$domrole.'_'.$courole);
3059: return reply($command,$ENV{'user.home'});
3060: } else {
3061: return 'refused';
3062: }
3063: }
3064:
3065: # ---------------- Make a metadata query against the network of library servers
3066:
3067: sub metadata_query {
3068: my ($query,$custom,$customshow,$server_array)=@_;
3069: my %rhash;
3070: my @server_list = (defined($server_array) ? @$server_array
3071: : keys(%libserv) );
3072: for my $server (@server_list) {
3073: unless ($custom or $customshow) {
3074: my $reply=&reply("querysend:".&escape($query),$server);
3075: $rhash{$server}=$reply;
3076: }
3077: else {
3078: my $reply=&reply("querysend:".&escape($query).':'.
3079: &escape($custom).':'.&escape($customshow),
3080: $server);
3081: $rhash{$server}=$reply;
3082: }
3083: }
3084: return \%rhash;
3085: }
3086:
3087: # ----------------------------------------- Send log queries and wait for reply
3088:
3089: sub log_query {
3090: my ($uname,$udom,$query,%filters)=@_;
3091: my $uhome=&homeserver($uname,$udom);
3092: if ($uhome eq 'no_host') { return 'error: no_host'; }
3093: my $uhost=$hostname{$uhome};
3094: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3095: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3096: $uhome);
3097: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3098: return get_query_reply($queryid);
3099: }
3100:
3101: # ------- Request retrieval of institutional classlists for course(s)
3102:
3103: sub fetch_enrollment_query {
3104: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3105: my $homeserver;
3106: if ($context eq 'automated') {
3107: $homeserver = $perlvar{'lonHostID'};
3108: } else {
3109: $homeserver = &homeserver($cnum,$dom);
3110: }
3111: my $host=$hostname{$homeserver};
3112: my $cmd = '';
3113: foreach (keys %{$affiliatesref}) {
3114: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3115: }
3116: $cmd =~ s/%%$//;
3117: $cmd = &escape($cmd);
3118: my $query = 'fetchenrollment';
3119: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$ENV{'user.name'}.':'.$cmd,$homeserver);
3120: unless ($queryid=~/^\Q$host\E\_/) { return 'error: '.$queryid; }
3121: my $reply = &get_query_reply($queryid);
3122: unless ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3123: my @responses = split/:/,$reply;
3124: if ($homeserver eq $perlvar{'lonHostID'}) {
3125: foreach (@responses) {
3126: my ($key,$value) = split/=/,$_;
3127: $$replyref{$key} = $value;
3128: }
3129: } else {
3130: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3131: foreach (@responses) {
3132: my ($key,$value) = split/=/,$_;
3133: $$replyref{$key} = $value;
3134: if ($value > 0) {
3135: foreach (@{$$affiliatesref{$key}}) {
3136: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3137: my $destname = $pathname.'/'.$filename;
3138: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3139: unless ($xml_classlist =~ /^error/) {
3140: if ( open(FILE,">$destname") ) {
3141: print FILE &unescape($xml_classlist);
3142: close(FILE);
3143: }
3144: }
3145: }
3146: }
3147: }
3148: }
3149: return 'ok';
3150: }
3151: return 'error';
3152: }
3153:
3154: sub get_query_reply {
3155: my $queryid=shift;
3156: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3157: my $reply='';
3158: for (1..100) {
3159: sleep 2;
3160: if (-e $replyfile.'.end') {
3161: if (open(my $fh,$replyfile)) {
3162: $reply.=<$fh>;
3163: close($fh);
3164: } else { return 'error: reply_file_error'; }
3165: return &unescape($reply);
3166: }
3167: }
3168: return 'timeout:'.$queryid;
3169: }
3170:
3171: sub courselog_query {
3172: #
3173: # possible filters:
3174: # url: url or symb
3175: # username
3176: # domain
3177: # action: view, submit, grade
3178: # start: timestamp
3179: # end: timestamp
3180: #
3181: my (%filters)=@_;
3182: unless ($ENV{'request.course.id'}) { return 'no_course'; }
3183: if ($filters{'url'}) {
3184: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3185: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3186: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3187: }
3188: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
3189: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
3190: return &log_query($cname,$cdom,'courselog',%filters);
3191: }
3192:
3193: sub userlog_query {
3194: my ($uname,$udom,%filters)=@_;
3195: return &log_query($uname,$udom,'userlog',%filters);
3196: }
3197:
3198: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3199:
3200: sub auto_run {
3201: my ($cnum,$cdom) = @_;
3202: my $homeserver = &homeserver($cnum,$cdom);
3203: my $response = &reply('autorun:'.$cdom,$homeserver);
3204: return $response;
3205: }
3206:
3207: sub auto_get_sections {
3208: my ($cnum,$cdom,$inst_coursecode) = @_;
3209: my $homeserver = &homeserver($cnum,$cdom);
3210: my @secs = ();
3211: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3212: unless ($response eq 'refused') {
3213: @secs = split/:/,$response;
3214: }
3215: return @secs;
3216: }
3217:
3218: sub auto_new_course {
3219: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3220: my $homeserver = &homeserver($cnum,$cdom);
3221: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3222: return $response;
3223: }
3224:
3225: sub auto_validate_courseID {
3226: my ($cnum,$cdom,$inst_course_id) = @_;
3227: my $homeserver = &homeserver($cnum,$cdom);
3228: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3229: return $response;
3230: }
3231:
3232: sub auto_create_password {
3233: my ($cnum,$cdom,$authparam) = @_;
3234: my $homeserver = &homeserver($cnum,$cdom);
3235: my $create_passwd = 0;
3236: my $authchk = '';
3237: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3238: if ($response eq 'refused') {
3239: $authchk = 'refused';
3240: } else {
3241: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3242: }
3243: return ($authparam,$create_passwd,$authchk);
3244: }
3245:
3246: sub auto_instcode_format {
3247: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3248: my $courses = '';
3249: my $homeserver;
3250: if ($caller eq 'global') {
3251: $homeserver = $perlvar{'lonHostID'};
3252: } else {
3253: $homeserver = &homeserver($caller,$codedom);
3254: }
3255: my $host=$hostname{$homeserver};
3256: foreach (keys %{$instcodes}) {
3257: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3258: }
3259: chop($courses);
3260: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3261: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3262: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3263: %{$codes} = &str2hash($codes_str);
3264: @{$codetitles} = &str2array($codetitles_str);
3265: %{$cat_titles} = &str2hash($cat_titles_str);
3266: %{$cat_order} = &str2hash($cat_order_str);
3267: return 'ok';
3268: }
3269: return $response;
3270: }
3271:
3272: # ------------------------------------------------------------------ Plain Text
3273:
3274: sub plaintext {
3275: my $short=shift;
3276: return &mt($prp{$short});
3277: }
3278:
3279: # ----------------------------------------------------------------- Assign Role
3280:
3281: sub assignrole {
3282: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3283: my $mrole;
3284: if ($role =~ /^cr\//) {
3285: my $cwosec=$url;
3286: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3287: unless (&allowed('ccr',$cwosec)) {
3288: &logthis('Refused custom assignrole: '.
3289: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3290: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3291: return 'refused';
3292: }
3293: $mrole='cr';
3294: } else {
3295: my $cwosec=$url;
3296: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3297: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3298: &logthis('Refused assignrole: '.
3299: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3300: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3301: return 'refused';
3302: }
3303: $mrole=$role;
3304: }
3305: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3306: "$udom:$uname:$url".'_'."$mrole=$role";
3307: if ($end) { $command.='_'.$end; }
3308: if ($start) {
3309: if ($end) {
3310: $command.='_'.$start;
3311: } else {
3312: $command.='_0_'.$start;
3313: }
3314: }
3315: # actually delete
3316: if ($deleteflag) {
3317: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3318: # modify command to delete the role
3319: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
3320: "$udom:$uname:$url".'_'."$mrole";
3321: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
3322: # set start and finish to negative values for userrolelog
3323: $start=-1;
3324: $end=-1;
3325: }
3326: }
3327: # send command
3328: my $answer=&reply($command,&homeserver($uname,$udom));
3329: # log new user role if status is ok
3330: if ($answer eq 'ok') {
3331: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
3332: }
3333: return $answer;
3334: }
3335:
3336: # -------------------------------------------------- Modify user authentication
3337: # Overrides without validation
3338:
3339: sub modifyuserauth {
3340: my ($udom,$uname,$umode,$upass)=@_;
3341: my $uhome=&homeserver($uname,$udom);
3342: unless (&allowed('mau',$udom)) { return 'refused'; }
3343: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3344: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3345: ' in domain '.$ENV{'request.role.domain'});
3346: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3347: &escape($upass),$uhome);
3348: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
3349: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3350: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3351: &log($udom,,$uname,$uhome,
3352: 'Authentication changed by '.$ENV{'user.domain'}.', '.
3353: $ENV{'user.name'}.', '.$umode.
3354: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3355: unless ($reply eq 'ok') {
3356: &logthis('Authentication mode error: '.$reply);
3357: return 'error: '.$reply;
3358: }
3359: return 'ok';
3360: }
3361:
3362: # --------------------------------------------------------------- Modify a user
3363:
3364: sub modifyuser {
3365: my ($udom, $uname, $uid,
3366: $umode, $upass, $first,
3367: $middle, $last, $gene,
3368: $forceid, $desiredhome, $email)=@_;
3369: $udom=~s/\W//g;
3370: $uname=~s/\W//g;
3371: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3372: $umode.', '.$first.', '.$middle.', '.
3373: $last.', '.$gene.'(forceid: '.$forceid.')'.
3374: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3375: ' desiredhome not specified').
3376: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3377: ' in domain '.$ENV{'request.role.domain'});
3378: my $uhome=&homeserver($uname,$udom,'true');
3379: # ----------------------------------------------------------------- Create User
3380: if (($uhome eq 'no_host') &&
3381: (($umode && $upass) || ($umode eq 'localauth'))) {
3382: my $unhome='';
3383: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3384: $unhome = $desiredhome;
3385: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
3386: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
3387: } else { # load balancing routine for determining $unhome
3388: my $tryserver;
3389: my $loadm=10000000;
3390: foreach $tryserver (keys %libserv) {
3391: if ($hostdom{$tryserver} eq $udom) {
3392: my $answer=reply('load',$tryserver);
3393: if (($answer=~/\d+/) && ($answer<$loadm)) {
3394: $loadm=$answer;
3395: $unhome=$tryserver;
3396: }
3397: }
3398: }
3399: }
3400: if (($unhome eq '') || ($unhome eq 'no_host')) {
3401: return 'error: unable to find a home server for '.$uname.
3402: ' in domain '.$udom;
3403: }
3404: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3405: &escape($upass),$unhome);
3406: unless ($reply eq 'ok') {
3407: return 'error: '.$reply;
3408: }
3409: $uhome=&homeserver($uname,$udom,'true');
3410: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3411: return 'error: unable verify users home machine.';
3412: }
3413: } # End of creation of new user
3414: # ---------------------------------------------------------------------- Add ID
3415: if ($uid) {
3416: $uid=~tr/A-Z/a-z/;
3417: my %uidhash=&idrget($udom,$uname);
3418: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3419: && (!$forceid)) {
3420: unless ($uid eq $uidhash{$uname}) {
3421: return 'error: user id "'.$uid.'" does not match '.
3422: 'current user id "'.$uidhash{$uname}.'".';
3423: }
3424: } else {
3425: &idput($udom,($uname => $uid));
3426: }
3427: }
3428: # -------------------------------------------------------------- Add names, etc
3429: my @tmp=&get('environment',
3430: ['firstname','middlename','lastname','generation'],
3431: $udom,$uname);
3432: my %names;
3433: if ($tmp[0] =~ m/^error:.*/) {
3434: %names=();
3435: } else {
3436: %names = @tmp;
3437: }
3438: #
3439: # Make sure to not trash student environment if instructor does not bother
3440: # to supply name and email information
3441: #
3442: if ($first) { $names{'firstname'} = $first; }
3443: if (defined($middle)) { $names{'middlename'} = $middle; }
3444: if ($last) { $names{'lastname'} = $last; }
3445: if (defined($gene)) { $names{'generation'} = $gene; }
3446: if ($email) { $names{'notification'} = $email;
3447: $names{'critnotification'} = $email; }
3448:
3449: my $reply = &put('environment', \%names, $udom,$uname);
3450: if ($reply ne 'ok') { return 'error: '.$reply; }
3451: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
3452: $umode.', '.$first.', '.$middle.', '.
3453: $last.', '.$gene.' by '.
3454: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3455: return 'ok';
3456: }
3457:
3458: # -------------------------------------------------------------- Modify student
3459:
3460: sub modifystudent {
3461: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3462: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
3463: if (!$cid) {
3464: unless ($cid=$ENV{'request.course.id'}) {
3465: return 'not_in_class';
3466: }
3467: }
3468: # --------------------------------------------------------------- Make the user
3469: my $reply=&modifyuser
3470: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
3471: $desiredhome,$email);
3472: unless ($reply eq 'ok') { return $reply; }
3473: # This will cause &modify_student_enrollment to get the uid from the
3474: # students environment
3475: $uid = undef if (!$forceid);
3476: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
3477: $gene,$usec,$end,$start,$type,$locktype,$cid);
3478: return $reply;
3479: }
3480:
3481: sub modify_student_enrollment {
3482: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
3483: my ($cdom,$cnum,$chome);
3484: if (!$cid) {
3485: unless ($cid=$ENV{'request.course.id'}) {
3486: return 'not_in_class';
3487: }
3488: $cdom=$ENV{'course.'.$cid.'.domain'};
3489: $cnum=$ENV{'course.'.$cid.'.num'};
3490: } else {
3491: ($cdom,$cnum)=split(/_/,$cid);
3492: }
3493: $chome=$ENV{'course.'.$cid.'.home'};
3494: if (!$chome) {
3495: $chome=&homeserver($cnum,$cdom);
3496: }
3497: if (!$chome) { return 'unknown_course'; }
3498: # Make sure the user exists
3499: my $uhome=&homeserver($uname,$udom);
3500: if (($uhome eq '') || ($uhome eq 'no_host')) {
3501: return 'error: no such user';
3502: }
3503: # Get student data if we were not given enough information
3504: if (!defined($first) || $first eq '' ||
3505: !defined($last) || $last eq '' ||
3506: !defined($uid) || $uid eq '' ||
3507: !defined($middle) || $middle eq '' ||
3508: !defined($gene) || $gene eq '') {
3509: # They did not supply us with enough data to enroll the student, so
3510: # we need to pick up more information.
3511: my %tmp = &get('environment',
3512: ['firstname','middlename','lastname', 'generation','id']
3513: ,$udom,$uname);
3514:
3515: #foreach (keys(%tmp)) {
3516: # &logthis("key $_ = ".$tmp{$_});
3517: #}
3518: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3519: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3520: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3521: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3522: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3523: }
3524: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
3525: $first,$middle);
3526: my $reply=cput('classlist',
3527: {"$uname:$udom" =>
3528: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
3529: $cdom,$cnum);
3530: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3531: return 'error: '.$reply;
3532: }
3533: # Add student role to user
3534: my $uurl='/'.$cid;
3535: $uurl=~s/\_/\//g;
3536: if ($usec) {
3537: $uurl.='/'.$usec;
3538: }
3539: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3540: }
3541:
3542: # ------------------------------------------------- Write to course preferences
3543:
3544: sub writecoursepref {
3545: my ($courseid,%prefs)=@_;
3546: $courseid=~s/^\///;
3547: $courseid=~s/\_/\//g;
3548: my ($cdomain,$cnum)=split(/\//,$courseid);
3549: my $chome=homeserver($cnum,$cdomain);
3550: if (($chome eq '') || ($chome eq 'no_host')) {
3551: return 'error: no such course';
3552: }
3553: my $cstring='';
3554: foreach (keys %prefs) {
3555: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3556: }
3557: $cstring=~s/\&$//;
3558: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3559: }
3560:
3561: # ---------------------------------------------------------- Make/modify course
3562:
3563: sub createcourse {
3564: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code)=@_;
3565: $url=&declutter($url);
3566: my $cid='';
3567: unless (&allowed('ccc',$udom)) {
3568: return 'refused';
3569: }
3570: # ------------------------------------------------------------------- Create ID
3571: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3572: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3573: # ----------------------------------------------- Make sure that does not exist
3574: my $uhome=&homeserver($uname,$udom,'true');
3575: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3576: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3577: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3578: $uhome=&homeserver($uname,$udom,'true');
3579: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3580: return 'error: unable to generate unique course-ID';
3581: }
3582: }
3583: # ------------------------------------------------ Check supplied server name
3584: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3585: if (! exists($libserv{$course_server})) {
3586: return 'error:bad server name '.$course_server;
3587: }
3588: # ------------------------------------------------------------- Make the course
3589: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3590: $course_server);
3591: unless ($reply eq 'ok') { return 'error: '.$reply; }
3592: $uhome=&homeserver($uname,$udom,'true');
3593: if (($uhome eq '') || ($uhome eq 'no_host')) {
3594: return 'error: no such course';
3595: }
3596: # ----------------------------------------------------------------- Course made
3597: # log existence
3598: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
3599: '='.&escape($inst_code),$uhome);
3600: &flushcourselogs();
3601: # set toplevel url
3602: my $topurl=$url;
3603: unless ($nonstandard) {
3604: # ------------------------------------------ For standard courses, make top url
3605: my $mapurl=&clutter($url);
3606: if ($mapurl eq '/res/') { $mapurl=''; }
3607: $ENV{'form.initmap'}=(<<ENDINITMAP);
3608: <map>
3609: <resource id="1" type="start"></resource>
3610: <resource id="2" src="$mapurl"></resource>
3611: <resource id="3" type="finish"></resource>
3612: <link index="1" from="1" to="2"></link>
3613: <link index="2" from="2" to="3"></link>
3614: </map>
3615: ENDINITMAP
3616: $topurl=&declutter(
3617: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3618: );
3619: }
3620: # ----------------------------------------------------------- Write preferences
3621: &writecoursepref($udom.'_'.$uname,
3622: ('description' => $description,
3623: 'url' => $topurl));
3624: return '/'.$udom.'/'.$uname;
3625: }
3626:
3627: # ---------------------------------------------------------- Assign Custom Role
3628:
3629: sub assigncustomrole {
3630: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3631: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3632: $end,$start,$deleteflag);
3633: }
3634:
3635: # ----------------------------------------------------------------- Revoke Role
3636:
3637: sub revokerole {
3638: my ($udom,$uname,$url,$role,$deleteflag)=@_;
3639: my $now=time;
3640: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
3641: }
3642:
3643: # ---------------------------------------------------------- Revoke Custom Role
3644:
3645: sub revokecustomrole {
3646: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
3647: my $now=time;
3648: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3649: $deleteflag);
3650: }
3651:
3652:
3653: # ------------------------------------------------------------ Portfolio Director Lister
3654: # returns listing of contents of user's /userfiles/portfolio/ directory
3655: #
3656:
3657: sub portfoliolist {
3658: my ($currentPath, $currentFile) = @_;
3659: my ($udom, $uname, $portfolioRoot);
3660: $uname=$ENV{'user.name'};
3661: $udom=$ENV{'user.domain'};
3662: # really should interrogate the system for home directory information, but . . .
3663: $portfolioRoot = '/home/httpd/lonUsers/'.$udom.'/';
3664: $uname =~ /^(.?)(.?)(.?)/;
3665: $portfolioRoot = $portfolioRoot.$1.'/'.$2.'/'.$3.'/'.$uname.'/userfiles/portfolio';
3666: my $listing = &reply('ls:'.$portfolioRoot.$currentPath, &homeserver($uname,$udom));
3667: return $listing;
3668: }
3669:
3670: sub portfoliomanage {
3671:
3672: #FIXME please user the existing remove userfile function instead and
3673: #add a userfilerename functions.
3674: #FIXME uhome should never be an argument to any lonnet functions
3675:
3676: # handles deleting and renaming files in user's userfiles/portfolio/ directory
3677: #
3678: my ($filename, $fileaction, $filenewname) = @_;
3679: my ($udom, $uname, $uhome);
3680: $uname=$ENV{'user.name'};
3681: $udom=$ENV{'user.domain'};
3682: $uhome=$ENV{'user.home'};
3683: my $listing = reply('portfoliomanage:'.$uname.':'.$udom.':'.$filename.':'.$fileaction.':'.$filenewname, $uhome);
3684: return $listing;
3685: }
3686:
3687:
3688: # ------------------------------------------------------------ Directory lister
3689:
3690: sub dirlist {
3691: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3692:
3693: $uri=~s/^\///;
3694: $uri=~s/\/$//;
3695: my ($udom, $uname);
3696: (undef,$udom,$uname)=split(/\//,$uri);
3697: if(defined($userdomain)) {
3698: $udom = $userdomain;
3699: }
3700: if(defined($username)) {
3701: $uname = $username;
3702: }
3703:
3704: my $dirRoot = $perlvar{'lonDocRoot'};
3705: if(defined($alternateDirectoryRoot)) {
3706: $dirRoot = $alternateDirectoryRoot;
3707: $dirRoot =~ s/\/$//;
3708: }
3709:
3710: if($udom) {
3711: if($uname) {
3712: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
3713: homeserver($uname,$udom));
3714: return split(/:/,$listing);
3715: } elsif(!defined($alternateDirectoryRoot)) {
3716: my $tryserver;
3717: my %allusers=();
3718: foreach $tryserver (keys %libserv) {
3719: if($hostdom{$tryserver} eq $udom) {
3720: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3721: $udom, $tryserver);
3722: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
3723: && ($listing ne 'con_lost')) {
3724: foreach (split(/:/,$listing)) {
3725: my ($entry,@stat)=split(/&/,$_);
3726: $allusers{$entry}=1;
3727: }
3728: }
3729: }
3730: }
3731: my $alluserstr='';
3732: foreach (sort keys %allusers) {
3733: $alluserstr.=$_.'&user:';
3734: }
3735: $alluserstr=~s/:$//;
3736: return split(/:/,$alluserstr);
3737: } else {
3738: my @emptyResults = ();
3739: push(@emptyResults, 'missing user name');
3740: return split(':',@emptyResults);
3741: }
3742: } elsif(!defined($alternateDirectoryRoot)) {
3743: my $tryserver;
3744: my %alldom=();
3745: foreach $tryserver (keys %libserv) {
3746: $alldom{$hostdom{$tryserver}}=1;
3747: }
3748: my $alldomstr='';
3749: foreach (sort keys %alldom) {
3750: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
3751: }
3752: $alldomstr=~s/:$//;
3753: return split(/:/,$alldomstr);
3754: } else {
3755: my @emptyResults = ();
3756: push(@emptyResults, 'missing domain');
3757: return split(':',@emptyResults);
3758: }
3759: }
3760:
3761: # --------------------------------------------- GetFileTimestamp
3762: # This function utilizes dirlist and returns the date stamp for
3763: # when it was last modified. It will also return an error of -1
3764: # if an error occurs
3765:
3766: ##
3767: ## FIXME: This subroutine assumes its caller knows something about the
3768: ## directory structure of the home server for the student ($root).
3769: ## Not a good assumption to make. Since this is for looking up files
3770: ## in user directories, the full path should be constructed by lond, not
3771: ## whatever machine we request data from.
3772: ##
3773: sub GetFileTimestamp {
3774: my ($studentDomain,$studentName,$filename,$root)=@_;
3775: $studentDomain=~s/\W//g;
3776: $studentName=~s/\W//g;
3777: my $subdir=$studentName.'__';
3778: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3779: my $proname="$studentDomain/$subdir/$studentName";
3780: $proname .= '/'.$filename;
3781: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
3782: $studentName, $root);
3783: my @stats = split('&', $fileStat);
3784: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
3785: # @stats contains first the filename, then the stat output
3786: return $stats[10]; # so this is 10 instead of 9.
3787: } else {
3788: return -1;
3789: }
3790: }
3791:
3792: # -------------------------------------------------------- Value of a Condition
3793:
3794: sub directcondval {
3795: my $number=shift;
3796: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
3797: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
3798: } else {
3799: return 2;
3800: }
3801: }
3802:
3803: sub condval {
3804: my $condidx=shift;
3805: my $result=0;
3806: my $allpathcond='';
3807: foreach (split(/\|/,$condidx)) {
3808: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
3809: $allpathcond.=
3810: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
3811: }
3812: }
3813: $allpathcond=~s/\|$//;
3814: if ($ENV{'request.course.id'}) {
3815: if ($allpathcond) {
3816: my $operand='|';
3817: my @stack;
3818: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
3819: if ($_ eq '(') {
3820: push @stack,($operand,$result)
3821: } elsif ($_ eq ')') {
3822: my $before=pop @stack;
3823: if (pop @stack eq '&') {
3824: $result=$result>$before?$before:$result;
3825: } else {
3826: $result=$result>$before?$result:$before;
3827: }
3828: } elsif (($_ eq '&') || ($_ eq '|')) {
3829: $operand=$_;
3830: } else {
3831: my $new=directcondval($_);
3832: if ($operand eq '&') {
3833: $result=$result>$new?$new:$result;
3834: } else {
3835: $result=$result>$new?$result:$new;
3836: }
3837: }
3838: }
3839: }
3840: }
3841: return $result;
3842: }
3843:
3844: # ---------------------------------------------------- Devalidate courseresdata
3845:
3846: sub devalidatecourseresdata {
3847: my ($coursenum,$coursedomain)=@_;
3848: my $hashid=$coursenum.':'.$coursedomain;
3849: &devalidate_cache(\%courseresdatacache,$hashid,'courseres');
3850: }
3851:
3852: # --------------------------------------------------- Course Resourcedata Query
3853:
3854: sub courseresdata {
3855: my ($coursenum,$coursedomain,@which)=@_;
3856: my $coursehom=&homeserver($coursenum,$coursedomain);
3857: my $hashid=$coursenum.':'.$coursedomain;
3858: my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid,'courseres');
3859: unless (defined($cached)) {
3860: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
3861: $result=\%dumpreply;
3862: my ($tmp) = keys(%dumpreply);
3863: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
3864: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
3865: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3866: return $tmp;
3867: } elsif ($tmp =~ /^(error)/) {
3868: $result=undef;
3869: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
3870: }
3871: }
3872: foreach my $item (@which) {
3873: if (defined($result->{$item})) {
3874: return $result->{$item};
3875: }
3876: }
3877: return undef;
3878: }
3879:
3880: #
3881: # EXT resource caching routines
3882: #
3883:
3884: sub clear_EXT_cache_status {
3885: &delenv('cache.EXT.');
3886: }
3887:
3888: sub EXT_cache_status {
3889: my ($target_domain,$target_user) = @_;
3890: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3891: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
3892: # We know already the user has no data
3893: return 1;
3894: } else {
3895: return 0;
3896: }
3897: }
3898:
3899: sub EXT_cache_set {
3900: my ($target_domain,$target_user) = @_;
3901: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3902: &appenv($cachename => time);
3903: }
3904:
3905: # --------------------------------------------------------- Value of a Variable
3906: sub EXT {
3907: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
3908:
3909: unless ($varname) { return ''; }
3910: #get real user name/domain, courseid and symb
3911: my $courseid;
3912: my $publicuser;
3913: if ($symbparm) {
3914: $symbparm=&get_symb_from_alias($symbparm);
3915: }
3916: if (!($uname && $udom)) {
3917: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
3918: &Apache::lonxml::whichuser($symbparm);
3919: if (!$symbparm) { $symbparm=$cursymb; }
3920: } else {
3921: $courseid=$ENV{'request.course.id'};
3922: }
3923: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
3924: my $rest;
3925: if (defined($therest[0])) {
3926: $rest=join('.',@therest);
3927: } else {
3928: $rest='';
3929: }
3930:
3931: my $qualifierrest=$qualifier;
3932: if ($rest) { $qualifierrest.='.'.$rest; }
3933: my $spacequalifierrest=$space;
3934: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
3935: if ($realm eq 'user') {
3936: # --------------------------------------------------------------- user.resource
3937: if ($space eq 'resource') {
3938: if (defined($Apache::lonhomework::parsing_a_problem)) {
3939: return $Apache::lonhomework::history{$qualifierrest};
3940: } else {
3941: my %restored;
3942: if ($publicuser || $ENV{'request.state'} eq 'construct') {
3943: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
3944: } else {
3945: %restored=&restore($symbparm,$courseid,$udom,$uname);
3946: }
3947: return $restored{$qualifierrest};
3948: }
3949: # ----------------------------------------------------------------- user.access
3950: } elsif ($space eq 'access') {
3951: # FIXME - not supporting calls for a specific user
3952: return &allowed($qualifier,$rest);
3953: # ------------------------------------------ user.preferences, user.environment
3954: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
3955: if (($uname eq $ENV{'user.name'}) &&
3956: ($udom eq $ENV{'user.domain'})) {
3957: return $ENV{join('.',('environment',$qualifierrest))};
3958: } else {
3959: my %returnhash;
3960: if (!$publicuser) {
3961: %returnhash=&userenvironment($udom,$uname,
3962: $qualifierrest);
3963: }
3964: return $returnhash{$qualifierrest};
3965: }
3966: # ----------------------------------------------------------------- user.course
3967: } elsif ($space eq 'course') {
3968: # FIXME - not supporting calls for a specific user
3969: return $ENV{join('.',('request.course',$qualifier))};
3970: # ------------------------------------------------------------------- user.role
3971: } elsif ($space eq 'role') {
3972: # FIXME - not supporting calls for a specific user
3973: my ($role,$where)=split(/\./,$ENV{'request.role'});
3974: if ($qualifier eq 'value') {
3975: return $role;
3976: } elsif ($qualifier eq 'extent') {
3977: return $where;
3978: }
3979: # ----------------------------------------------------------------- user.domain
3980: } elsif ($space eq 'domain') {
3981: return $udom;
3982: # ------------------------------------------------------------------- user.name
3983: } elsif ($space eq 'name') {
3984: return $uname;
3985: # ---------------------------------------------------- Any other user namespace
3986: } else {
3987: my %reply;
3988: if (!$publicuser) {
3989: %reply=&get($space,[$qualifierrest],$udom,$uname);
3990: }
3991: return $reply{$qualifierrest};
3992: }
3993: } elsif ($realm eq 'query') {
3994: # ---------------------------------------------- pull stuff out of query string
3995: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
3996: [$spacequalifierrest]);
3997: return $ENV{'form.'.$spacequalifierrest};
3998: } elsif ($realm eq 'request') {
3999: # ------------------------------------------------------------- request.browser
4000: if ($space eq 'browser') {
4001: if ($qualifier eq 'textremote') {
4002: if (&mt('textual_remote_display') eq 'on') {
4003: return 1;
4004: } else {
4005: return 0;
4006: }
4007: } else {
4008: return $ENV{'browser.'.$qualifier};
4009: }
4010: # ------------------------------------------------------------ request.filename
4011: } else {
4012: return $ENV{'request.'.$spacequalifierrest};
4013: }
4014: } elsif ($realm eq 'course') {
4015: # ---------------------------------------------------------- course.description
4016: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
4017: } elsif ($realm eq 'resource') {
4018:
4019: my $section;
4020: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
4021:
4022: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
4023:
4024: # ----------------------------------------------------- Cascading lookup scheme
4025: if (!$symbparm) { $symbparm=&symbread(); }
4026: my $symbp=$symbparm;
4027: my $mapp=(&decode_symb($symbp))[0];
4028:
4029: my $symbparm=$symbp.'.'.$spacequalifierrest;
4030: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
4031:
4032: if (($ENV{'user.name'} eq $uname) &&
4033: ($ENV{'user.domain'} eq $udom)) {
4034: $section=$ENV{'request.course.sec'};
4035: } else {
4036: if (! defined($usection)) {
4037: $section=&usection($udom,$uname,$courseid);
4038: } else {
4039: $section = $usection;
4040: }
4041: }
4042:
4043: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
4044: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
4045: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
4046:
4047: my $courselevel=$courseid.'.'.$spacequalifierrest;
4048: my $courselevelr=$courseid.'.'.$symbparm;
4049: my $courselevelm=$courseid.'.'.$mapparm;
4050:
4051: # ----------------------------------------------------------- first, check user
4052: #most student don\'t have any data set, check if there is some data
4053: if (! &EXT_cache_status($udom,$uname)) {
4054: my $hashid="$udom:$uname";
4055: my ($result,$cached)=&is_cached(\%userresdatacache,$hashid,
4056: 'userres');
4057: if (!defined($cached)) {
4058: my %resourcedata=&dump('resourcedata',$udom,$uname);
4059: $result=\%resourcedata;
4060: &do_cache(\%userresdatacache,$hashid,$result,'userres');
4061: }
4062: my ($tmp)=keys(%$result);
4063: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4064: if ($$result{$courselevelr}) {
4065: return $$result{$courselevelr}; }
4066: if ($$result{$courselevelm}) {
4067: return $$result{$courselevelm}; }
4068: if ($$result{$courselevel}) {
4069: return $$result{$courselevel}; }
4070: } else {
4071: #error 2 occurs when the .db doesn't exist
4072: if ($tmp!~/error: 2 /) {
4073: &logthis("<font color=blue>WARNING:".
4074: " Trying to get resource data for ".
4075: $uname." at ".$udom.": ".
4076: $tmp."</font>");
4077: } elsif ($tmp=~/error: 2 /) {
4078: &EXT_cache_set($udom,$uname);
4079: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4080: return $tmp;
4081: }
4082: }
4083: }
4084:
4085: # -------------------------------------------------------- second, check course
4086:
4087: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
4088: $ENV{'course.'.$courseid.'.domain'},
4089: ($seclevelr,$seclevelm,$seclevel,
4090: $courselevelr,$courselevelm,
4091: $courselevel));
4092: if (defined($coursereply)) { return $coursereply; }
4093:
4094: # ------------------------------------------------------ third, check map parms
4095: my %parmhash=();
4096: my $thisparm='';
4097: if (tie(%parmhash,'GDBM_File',
4098: $ENV{'request.course.fn'}.'_parms.db',
4099: &GDBM_READER(),0640)) {
4100: $thisparm=$parmhash{$symbparm};
4101: untie(%parmhash);
4102: }
4103: if ($thisparm) { return $thisparm; }
4104: }
4105: # --------------------------------------------- last, look in resource metadata
4106:
4107: $spacequalifierrest=~s/\./\_/;
4108: my $filename;
4109: if (!$symbparm) { $symbparm=&symbread(); }
4110: if ($symbparm) {
4111: $filename=(&decode_symb($symbparm))[2];
4112: } else {
4113: $filename=$ENV{'request.filename'};
4114: }
4115: my $metadata=&metadata($filename,$spacequalifierrest);
4116: if (defined($metadata)) { return $metadata; }
4117: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
4118: if (defined($metadata)) { return $metadata; }
4119:
4120: # ------------------------------------------------------------------ Cascade up
4121: unless ($space eq '0') {
4122: my @parts=split(/_/,$space);
4123: my $id=pop(@parts);
4124: my $part=join('_',@parts);
4125: if ($part eq '') { $part='0'; }
4126: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
4127: $symbparm,$udom,$uname,$section,1);
4128: if (defined($partgeneral)) { return $partgeneral; }
4129: }
4130: if ($recurse) { return undef; }
4131: my $pack_def=&packages_tab_default($filename,$varname);
4132: if (defined($pack_def)) { return $pack_def; }
4133:
4134: # ---------------------------------------------------- Any other user namespace
4135: } elsif ($realm eq 'environment') {
4136: # ----------------------------------------------------------------- environment
4137: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
4138: return $ENV{'environment.'.$spacequalifierrest};
4139: } else {
4140: my %returnhash=&userenvironment($udom,$uname,
4141: $spacequalifierrest);
4142: return $returnhash{$spacequalifierrest};
4143: }
4144: } elsif ($realm eq 'system') {
4145: # ----------------------------------------------------------------- system.time
4146: if ($space eq 'time') {
4147: return time;
4148: }
4149: }
4150: return '';
4151: }
4152:
4153: sub packages_tab_default {
4154: my ($uri,$varname)=@_;
4155: my (undef,$part,$name)=split(/\./,$varname);
4156: my $packages=&metadata($uri,'packages');
4157: foreach my $package (split(/,/,$packages)) {
4158: my ($pack_type,$pack_part)=split(/_/,$package,2);
4159: if (defined($packagetab{"$pack_type&$name&default"})) {
4160: return $packagetab{"$pack_type&$name&default"};
4161: }
4162: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
4163: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
4164: }
4165: }
4166: return undef;
4167: }
4168:
4169: sub add_prefix_and_part {
4170: my ($prefix,$part)=@_;
4171: my $keyroot;
4172: if (defined($prefix) && $prefix !~ /^__/) {
4173: # prefix that has a part already
4174: $keyroot=$prefix;
4175: } elsif (defined($prefix)) {
4176: # prefix that is missing a part
4177: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
4178: } else {
4179: # no prefix at all
4180: if (defined($part)) { $keyroot='_'.$part; }
4181: }
4182: return $keyroot;
4183: }
4184:
4185: # ---------------------------------------------------------------- Get metadata
4186:
4187: sub metadata {
4188: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
4189: $uri=&declutter($uri);
4190: # if it is a non metadata possible uri return quickly
4191: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
4192: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
4193: ($uri =~ m|home/[^/]+/public_html/|)) {
4194: return undef;
4195: }
4196: my $filename=$uri;
4197: $uri=~s/\.meta$//;
4198: #
4199: # Is the metadata already cached?
4200: # Look at timestamp of caching
4201: # Everything is cached by the main uri, libraries are never directly cached
4202: #
4203: if (!defined($liburi)) {
4204: my ($result,$cached)=&is_cached(\%metacache,$uri,'meta');
4205: if (defined($cached)) { return $result->{':'.$what}; }
4206: }
4207: {
4208: #
4209: # Is this a recursive call for a library?
4210: #
4211: if (! exists($metacache{$uri})) {
4212: $metacache{$uri}={};
4213: }
4214: if ($liburi) {
4215: $liburi=&declutter($liburi);
4216: $filename=$liburi;
4217: } else {
4218: &devalidate_cache(\%metacache,$uri,'meta');
4219: }
4220: my %metathesekeys=();
4221: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
4222: my $metastring;
4223: if ($uri !~ m|^uploaded/|) {
4224: $metastring=&getfile(&filelocation('',&clutter($filename)));
4225: }
4226: my $parser=HTML::LCParser->new(\$metastring);
4227: my $token;
4228: undef %metathesekeys;
4229: while ($token=$parser->get_token) {
4230: if ($token->[0] eq 'S') {
4231: if (defined($token->[2]->{'package'})) {
4232: #
4233: # This is a package - get package info
4234: #
4235: my $package=$token->[2]->{'package'};
4236: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4237: if (defined($token->[2]->{'id'})) {
4238: $keyroot.='_'.$token->[2]->{'id'};
4239: }
4240: if ($metacache{$uri}->{':packages'}) {
4241: $metacache{$uri}->{':packages'}.=','.$package.$keyroot;
4242: } else {
4243: $metacache{$uri}->{':packages'}=$package.$keyroot;
4244: }
4245: foreach (keys %packagetab) {
4246: my $part=$keyroot;
4247: $part=~s/^\_//;
4248: if ($_=~/^\Q$package\E\&/ ||
4249: $_=~/^\Q$package\E_0\&/) {
4250: my ($pack,$name,$subp)=split(/\&/,$_);
4251: # ignore package.tab specified default values
4252: # here &package_tab_default() will fetch those
4253: if ($subp eq 'default') { next; }
4254: my $value=$packagetab{$_};
4255: my $unikey;
4256: if ($pack =~ /_0$/) {
4257: $unikey='parameter_0_'.$name;
4258: $part=0;
4259: } else {
4260: $unikey='parameter'.$keyroot.'_'.$name;
4261: }
4262: if ($subp eq 'display') {
4263: $value.=' [Part: '.$part.']';
4264: }
4265: $metacache{$uri}->{':'.$unikey.'.part'}=$part;
4266: $metathesekeys{$unikey}=1;
4267: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4268: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
4269: }
4270: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4271: $metacache{$uri}->{':'.$unikey}=
4272: $metacache{$uri}->{':'.$unikey.'.default'};
4273: }
4274: }
4275: }
4276: } else {
4277: #
4278: # This is not a package - some other kind of start tag
4279: #
4280: my $entry=$token->[1];
4281: my $unikey;
4282: if ($entry eq 'import') {
4283: $unikey='';
4284: } else {
4285: $unikey=$entry;
4286: }
4287: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4288:
4289: if (defined($token->[2]->{'id'})) {
4290: $unikey.='_'.$token->[2]->{'id'};
4291: }
4292:
4293: if ($entry eq 'import') {
4294: #
4295: # Importing a library here
4296: #
4297: if ($depthcount<20) {
4298: my $location=$parser->get_text('/import');
4299: my $dir=$filename;
4300: $dir=~s|[^/]*$||;
4301: $location=&filelocation($dir,$location);
4302: foreach (sort(split(/\,/,&metadata($uri,'keys',
4303: $location,$unikey,
4304: $depthcount+1)))) {
4305: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
4306: $metathesekeys{$_}=1;
4307: }
4308: }
4309: } else {
4310:
4311: if (defined($token->[2]->{'name'})) {
4312: $unikey.='_'.$token->[2]->{'name'};
4313: }
4314: $metathesekeys{$unikey}=1;
4315: foreach (@{$token->[3]}) {
4316: $metacache{$uri}->{':'.$unikey.'.'.$_}=$token->[2]->{$_};
4317: }
4318: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
4319: my $default=$metacache{$uri}->{':'.$unikey.'.default'};
4320: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
4321: # only ws inside the tag, and not in default, so use default
4322: # as value
4323: $metacache{$uri}->{':'.$unikey}=$default;
4324: } else {
4325: # either something interesting inside the tag or default
4326: # uninteresting
4327: $metacache{$uri}->{':'.$unikey}=$internaltext;
4328: }
4329: # end of not-a-package not-a-library import
4330: }
4331: # end of not-a-package start tag
4332: }
4333: # the next is the end of "start tag"
4334: }
4335: }
4336: my ($extension) = ($uri =~ /\.(\w+)$/);
4337: foreach my $key (sort(keys(%packagetab))) {
4338: #&logthis("extsion1 $extension $key !!");
4339: #no specific packages #how's our extension
4340: if ($key!~/^extension_\Q$extension\E&/) { next; }
4341: &metadata_create_package_def($uri,$key,'extension_'.$extension,
4342: \%metathesekeys);
4343: }
4344: if (!exists($metacache{$uri}->{':packages'})) {
4345: foreach my $key (sort(keys(%packagetab))) {
4346: #no specific packages well let's get default then
4347: if ($key!~/^default&/) { next; }
4348: &metadata_create_package_def($uri,$key,'default',
4349: \%metathesekeys);
4350: }
4351: }
4352: # are there custom rights to evaluate
4353: if ($metacache{$uri}->{':copyright'} eq 'custom') {
4354:
4355: #
4356: # Importing a rights file here
4357: #
4358: unless ($depthcount) {
4359: my $location=$metacache{$uri}->{':customdistributionfile'};
4360: my $dir=$filename;
4361: $dir=~s|[^/]*$||;
4362: $location=&filelocation($dir,$location);
4363: foreach (sort(split(/\,/,&metadata($uri,'keys',
4364: $location,'_rights',
4365: $depthcount+1)))) {
4366: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
4367: $metathesekeys{$_}=1;
4368: }
4369: }
4370: }
4371: $metacache{$uri}->{':keys'}=join(',',keys %metathesekeys);
4372: &metadata_generate_part0(\%metathesekeys,$metacache{$uri},$uri);
4373: $metacache{$uri}->{':allpossiblekeys'}=join(',',keys %metathesekeys);
4374: &do_cache(\%metacache,$uri,$metacache{$uri},'meta');
4375: # this is the end of "was not already recently cached
4376: }
4377: return $metacache{$uri}->{':'.$what};
4378: }
4379:
4380: sub metadata_create_package_def {
4381: my ($uri,$key,$package,$metathesekeys)=@_;
4382: my ($pack,$name,$subp)=split(/\&/,$key);
4383: if ($subp eq 'default') { next; }
4384:
4385: if (defined($metacache{$uri}->{':packages'})) {
4386: $metacache{$uri}->{':packages'}.=','.$package;
4387: } else {
4388: $metacache{$uri}->{':packages'}=$package;
4389: }
4390: my $value=$packagetab{$key};
4391: my $unikey;
4392: $unikey='parameter_0_'.$name;
4393: $metacache{$uri}->{':'.$unikey.'.part'}=0;
4394: $$metathesekeys{$unikey}=1;
4395: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4396: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
4397: }
4398: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4399: $metacache{$uri}->{':'.$unikey}=
4400: $metacache{$uri}->{':'.$unikey.'.default'};
4401: }
4402: }
4403:
4404: sub metadata_generate_part0 {
4405: my ($metadata,$metacache,$uri) = @_;
4406: my %allnames;
4407: foreach my $metakey (sort keys %$metadata) {
4408: if ($metakey=~/^parameter\_(.*)/) {
4409: my $part=$$metacache{':'.$metakey.'.part'};
4410: my $name=$$metacache{':'.$metakey.'.name'};
4411: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
4412: $allnames{$name}=$part;
4413: }
4414: }
4415: }
4416: foreach my $name (keys(%allnames)) {
4417: $$metadata{"parameter_0_$name"}=1;
4418: my $key=":parameter_0_$name";
4419: $$metacache{"$key.part"}='0';
4420: $$metacache{"$key.name"}=$name;
4421: $$metacache{"$key.type"}=$$metacache{':parameter_'.
4422: $allnames{$name}.'_'.$name.
4423: '.type'};
4424: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
4425: '.display'};
4426: my $expr='\\[Part: '.$allnames{$name}.'\\]';
4427: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
4428: $$metacache{"$key.display"}=$olddis;
4429: }
4430: }
4431:
4432: # ------------------------------------------------- Get the title of a resource
4433:
4434: sub gettitle {
4435: my $urlsymb=shift;
4436: my $symb=&symbread($urlsymb);
4437: unless ($symb) {
4438: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
4439: return &metadata($urlsymb,'title');
4440: }
4441: my ($result,$cached)=&is_cached(\%titlecache,$symb,'title',600);
4442: if (defined($cached)) { return $result; }
4443: my ($map,$resid,$url)=&decode_symb($symb);
4444: my $title='';
4445: my %bighash;
4446: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4447: &GDBM_READER(),0640)) {
4448: my $mapid=$bighash{'map_pc_'.&clutter($map)};
4449: $title=$bighash{'title_'.$mapid.'.'.$resid};
4450: untie %bighash;
4451: }
4452: $title=~s/\&colon\;/\:/gs;
4453: if ($title) {
4454: return &do_cache(\%titlecache,$symb,$title,'title');
4455: } else {
4456: return &metadata($urlsymb,'title');
4457: }
4458: }
4459:
4460: # ------------------------------------------------- Update symbolic store links
4461:
4462: sub symblist {
4463: my ($mapname,%newhash)=@_;
4464: $mapname=&deversion(&declutter($mapname));
4465: my %hash;
4466: if (($ENV{'request.course.fn'}) && (%newhash)) {
4467: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4468: &GDBM_WRCREAT(),0640)) {
4469: foreach (keys %newhash) {
4470: $hash{declutter($_)}=$mapname.'___'.&deversion($newhash{$_});
4471: }
4472: if (untie(%hash)) {
4473: return 'ok';
4474: }
4475: }
4476: }
4477: return 'error';
4478: }
4479:
4480: # --------------------------------------------------------------- Verify a symb
4481:
4482: sub symbverify {
4483: my ($symb,$thisurl)=@_;
4484: my $thisfn=$thisurl;
4485: # wrapper not part of symbs
4486: $thisfn=~s/^\/adm\/wrapper//;
4487: $thisfn=&declutter($thisfn);
4488: # direct jump to resource in page or to a sequence - will construct own symbs
4489: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
4490: # check URL part
4491: my ($map,$resid,$url)=&decode_symb($symb);
4492:
4493: unless ($url eq $thisfn) { return 0; }
4494:
4495: $symb=&symbclean($symb);
4496: $thisurl=&deversion($thisurl);
4497: $thisfn=&deversion($thisfn);
4498:
4499: my %bighash;
4500: my $okay=0;
4501:
4502: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4503: &GDBM_READER(),0640)) {
4504: my $ids=$bighash{'ids_'.&clutter($thisurl)};
4505: unless ($ids) {
4506: $ids=$bighash{'ids_/'.$thisurl};
4507: }
4508: if ($ids) {
4509: # ------------------------------------------------------------------- Has ID(s)
4510: foreach (split(/\,/,$ids)) {
4511: my ($mapid,$resid)=split(/\./,$_);
4512: if (
4513: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
4514: eq $symb) {
4515: $okay=1;
4516: }
4517: }
4518: }
4519: untie(%bighash);
4520: }
4521: return $okay;
4522: }
4523:
4524: # --------------------------------------------------------------- Clean-up symb
4525:
4526: sub symbclean {
4527: my $symb=shift;
4528:
4529: # remove version from map
4530: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
4531:
4532: # remove version from URL
4533: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
4534:
4535: # remove wrapper
4536:
4537: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
4538: return $symb;
4539: }
4540:
4541: # ---------------------------------------------- Split symb to find map and url
4542:
4543: sub encode_symb {
4544: my ($map,$resid,$url)=@_;
4545: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
4546: }
4547:
4548: sub decode_symb {
4549: my ($map,$resid,$url)=split(/\_\_\_/,shift);
4550: return (&fixversion($map),$resid,&fixversion($url));
4551: }
4552:
4553: sub fixversion {
4554: my $fn=shift;
4555: if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
4556: my %bighash;
4557: my $uri=&clutter($fn);
4558: my $key=$ENV{'request.course.id'}.'_'.$uri;
4559: # is this cached?
4560: my ($result,$cached)=&is_cached(\%courseresversioncache,$key,
4561: 'courseresversion',600);
4562: if (defined($cached)) { return $result; }
4563: # unfortunately not cached, or expired
4564: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4565: &GDBM_READER(),0640)) {
4566: if ($bighash{'version_'.$uri}) {
4567: my $version=$bighash{'version_'.$uri};
4568: unless (($version eq 'mostrecent') ||
4569: ($version==&getversion($uri))) {
4570: $uri=~s/\.(\w+)$/\.$version\.$1/;
4571: }
4572: }
4573: untie %bighash;
4574: }
4575: return &do_cache
4576: (\%courseresversioncache,$key,&declutter($uri),'courseresversion');
4577: }
4578:
4579: sub deversion {
4580: my $url=shift;
4581: $url=~s/\.\d+\.(\w+)$/\.$1/;
4582: return $url;
4583: }
4584:
4585: # ------------------------------------------------------ Return symb list entry
4586:
4587: sub symbread {
4588: my ($thisfn,$donotrecurse)=@_;
4589: # no filename provided? try from environment
4590: unless ($thisfn) {
4591: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
4592: $thisfn=$ENV{'request.filename'};
4593: }
4594: # is that filename actually a symb? Verify, clean, and return
4595: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
4596: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
4597: }
4598: $thisfn=declutter($thisfn);
4599: my %hash;
4600: my %bighash;
4601: my $syval='';
4602: if (($ENV{'request.course.fn'}) && ($thisfn)) {
4603: my $targetfn = $thisfn;
4604: if ( ($thisfn =~ m/^uploaded\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
4605: $targetfn = 'adm/wrapper/'.$thisfn;
4606: }
4607: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4608: &GDBM_READER(),0640)) {
4609: $syval=$hash{$targetfn};
4610: untie(%hash);
4611: }
4612: # ---------------------------------------------------------- There was an entry
4613: if ($syval) {
4614: unless ($syval=~/\_\d+$/) {
4615: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
4616: &appenv('request.ambiguous' => $thisfn);
4617: return '';
4618: }
4619: $syval.=$1;
4620: }
4621: } else {
4622: # ------------------------------------------------------- Was not in symb table
4623: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4624: &GDBM_READER(),0640)) {
4625: # ---------------------------------------------- Get ID(s) for current resource
4626: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4627: unless ($ids) {
4628: $ids=$bighash{'ids_/'.$thisfn};
4629: }
4630: unless ($ids) {
4631: # alias?
4632: $ids=$bighash{'mapalias_'.$thisfn};
4633: }
4634: if ($ids) {
4635: # ------------------------------------------------------------------- Has ID(s)
4636: my @possibilities=split(/\,/,$ids);
4637: if ($#possibilities==0) {
4638: # ----------------------------------------------- There is only one possibility
4639: my ($mapid,$resid)=split(/\./,$ids);
4640: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
4641: } elsif (!$donotrecurse) {
4642: # ------------------------------------------ There is more than one possibility
4643: my $realpossible=0;
4644: foreach (@possibilities) {
4645: my $file=$bighash{'src_'.$_};
4646: if (&allowed('bre',$file)) {
4647: my ($mapid,$resid)=split(/\./,$_);
4648: if ($bighash{'map_type_'.$mapid} ne 'page') {
4649: $realpossible++;
4650: $syval=declutter($bighash{'map_id_'.$mapid}).
4651: '___'.$resid;
4652: }
4653: }
4654: }
4655: if ($realpossible!=1) { $syval=''; }
4656: } else {
4657: $syval='';
4658: }
4659: }
4660: untie(%bighash)
4661: }
4662: }
4663: if ($syval) {
4664: return &symbclean($syval.'___'.$thisfn);
4665: }
4666: }
4667: &appenv('request.ambiguous' => $thisfn);
4668: return '';
4669: }
4670:
4671: # ---------------------------------------------------------- Return random seed
4672:
4673: sub numval {
4674: my $txt=shift;
4675: $txt=~tr/A-J/0-9/;
4676: $txt=~tr/a-j/0-9/;
4677: $txt=~tr/K-T/0-9/;
4678: $txt=~tr/k-t/0-9/;
4679: $txt=~tr/U-Z/0-5/;
4680: $txt=~tr/u-z/0-5/;
4681: $txt=~s/\D//g;
4682: return int($txt);
4683: }
4684:
4685: sub numval2 {
4686: my $txt=shift;
4687: $txt=~tr/A-J/0-9/;
4688: $txt=~tr/a-j/0-9/;
4689: $txt=~tr/K-T/0-9/;
4690: $txt=~tr/k-t/0-9/;
4691: $txt=~tr/U-Z/0-5/;
4692: $txt=~tr/u-z/0-5/;
4693: $txt=~s/\D//g;
4694: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
4695: my $total;
4696: foreach my $val (@txts) { $total+=$val; }
4697: return int($total);
4698: }
4699:
4700: sub latest_rnd_algorithm_id {
4701: return '64bit3';
4702: }
4703:
4704: sub get_rand_alg {
4705: my ($courseid)=@_;
4706: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
4707: if ($courseid) {
4708: return $ENV{"course.$courseid.rndseed"};
4709: }
4710: return &latest_rnd_algorithm_id();
4711: }
4712:
4713: sub getCODE {
4714: if (defined($ENV{'form.CODE'})) { return $ENV{'form.CODE'}; }
4715: if (defined($Apache::lonhomework::parsing_a_problem) &&
4716: defined($Apache::lonhomework::history{'resource.CODE'})) {
4717: return $Apache::lonhomework::history{'resource.CODE'};
4718: }
4719: return undef;
4720: }
4721:
4722: sub rndseed {
4723: my ($symb,$courseid,$domain,$username)=@_;
4724:
4725: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
4726: if (!$symb) {
4727: unless ($symb=$wsymb) { return time; }
4728: }
4729: if (!$courseid) { $courseid=$wcourseid; }
4730: if (!$domain) { $domain=$wdomain; }
4731: if (!$username) { $username=$wusername }
4732: my $which=&get_rand_alg();
4733: if (defined(&getCODE())) {
4734: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
4735: } elsif ($which eq '64bit3') {
4736: return &rndseed_64bit3($symb,$courseid,$domain,$username);
4737: } elsif ($which eq '64bit2') {
4738: return &rndseed_64bit2($symb,$courseid,$domain,$username);
4739: } elsif ($which eq '64bit') {
4740: return &rndseed_64bit($symb,$courseid,$domain,$username);
4741: }
4742: return &rndseed_32bit($symb,$courseid,$domain,$username);
4743: }
4744:
4745: sub rndseed_32bit {
4746: my ($symb,$courseid,$domain,$username)=@_;
4747: {
4748: use integer;
4749: my $symbchck=unpack("%32C*",$symb) << 27;
4750: my $symbseed=numval($symb) << 22;
4751: my $namechck=unpack("%32C*",$username) << 17;
4752: my $nameseed=numval($username) << 12;
4753: my $domainseed=unpack("%32C*",$domain) << 7;
4754: my $courseseed=unpack("%32C*",$courseid);
4755: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
4756: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4757: #&Apache::lonxml::debug("rndseed :$num:$symb");
4758: return $num;
4759: }
4760: }
4761:
4762: sub rndseed_64bit {
4763: my ($symb,$courseid,$domain,$username)=@_;
4764: {
4765: use integer;
4766: my $symbchck=unpack("%32S*",$symb) << 21;
4767: my $symbseed=numval($symb) << 10;
4768: my $namechck=unpack("%32S*",$username);
4769:
4770: my $nameseed=numval($username) << 21;
4771: my $domainseed=unpack("%32S*",$domain) << 10;
4772: my $courseseed=unpack("%32S*",$courseid);
4773:
4774: my $num1=$symbchck+$symbseed+$namechck;
4775: my $num2=$nameseed+$domainseed+$courseseed;
4776: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4777: #&Apache::lonxml::debug("rndseed :$num:$symb");
4778: return "$num1,$num2";
4779: }
4780: }
4781:
4782: sub rndseed_64bit2 {
4783: my ($symb,$courseid,$domain,$username)=@_;
4784: {
4785: use integer;
4786: # strings need to be an even # of cahracters long, it it is odd the
4787: # last characters gets thrown away
4788: my $symbchck=unpack("%32S*",$symb.' ') << 21;
4789: my $symbseed=numval($symb) << 10;
4790: my $namechck=unpack("%32S*",$username.' ');
4791:
4792: my $nameseed=numval($username) << 21;
4793: my $domainseed=unpack("%32S*",$domain.' ') << 10;
4794: my $courseseed=unpack("%32S*",$courseid.' ');
4795:
4796: my $num1=$symbchck+$symbseed+$namechck;
4797: my $num2=$nameseed+$domainseed+$courseseed;
4798: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4799: #&Apache::lonxml::debug("rndseed :$num:$symb");
4800: return "$num1,$num2";
4801: }
4802: }
4803:
4804: sub rndseed_64bit3 {
4805: my ($symb,$courseid,$domain,$username)=@_;
4806: {
4807: use integer;
4808: # strings need to be an even # of cahracters long, it it is odd the
4809: # last characters gets thrown away
4810: my $symbchck=unpack("%32S*",$symb.' ') << 21;
4811: my $symbseed=numval2($symb) << 10;
4812: my $namechck=unpack("%32S*",$username.' ');
4813:
4814: my $nameseed=numval2($username) << 21;
4815: my $domainseed=unpack("%32S*",$domain.' ') << 10;
4816: my $courseseed=unpack("%32S*",$courseid.' ');
4817:
4818: my $num1=$symbchck+$symbseed+$namechck;
4819: my $num2=$nameseed+$domainseed+$courseseed;
4820: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4821: #&Apache::lonxml::debug("rndseed :$num:$symb");
4822: return "$num1:$num2";
4823: }
4824: }
4825:
4826: sub rndseed_CODE_64bit {
4827: my ($symb,$courseid,$domain,$username)=@_;
4828: {
4829: use integer;
4830: my $symbchck=unpack("%32S*",$symb.' ') << 16;
4831: my $symbseed=numval2($symb);
4832: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
4833: my $CODEseed=numval(&getCODE());
4834: my $courseseed=unpack("%32S*",$courseid.' ');
4835: my $num1=$symbseed+$CODEchck;
4836: my $num2=$CODEseed+$courseseed+$symbchck;
4837: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
4838: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
4839: return "$num1:$num2";
4840: }
4841: }
4842:
4843: sub setup_random_from_rndseed {
4844: my ($rndseed)=@_;
4845: if ($rndseed =~/([,:])/) {
4846: my ($num1,$num2)=split(/[,:]/,$rndseed);
4847: &Math::Random::random_set_seed(abs($num1),abs($num2));
4848: } else {
4849: &Math::Random::random_set_seed_from_phrase($rndseed);
4850: }
4851: }
4852:
4853: sub latest_receipt_algorithm_id {
4854: return 'receipt2';
4855: }
4856:
4857: sub recunique {
4858: my $fucourseid=shift;
4859: my $unique;
4860: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
4861: $unique=$ENV{"course.$fucourseid.internal.encseed"};
4862: } else {
4863: $unique=$perlvar{'lonReceipt'};
4864: }
4865: return unpack("%32C*",$unique);
4866: }
4867:
4868: sub recprefix {
4869: my $fucourseid=shift;
4870: my $prefix;
4871: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
4872: $prefix=$ENV{"course.$fucourseid.internal.encpref"};
4873: } else {
4874: $prefix=$perlvar{'lonHostID'};
4875: }
4876: return unpack("%32C*",$prefix);
4877: }
4878:
4879: sub ireceipt {
4880: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
4881: my $cuname=unpack("%32C*",$funame);
4882: my $cudom=unpack("%32C*",$fudom);
4883: my $cucourseid=unpack("%32C*",$fucourseid);
4884: my $cusymb=unpack("%32C*",$fusymb);
4885: my $cunique=&recunique($fucourseid);
4886: my $cpart=unpack("%32S*",$part);
4887: my $return =&recprefix($fucourseid).'-';
4888: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
4889: $ENV{'request.state'} eq 'construct') {
4890: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
4891: " and ".($cpart%$cudom));
4892:
4893: $return.= ($cunique%$cuname+
4894: $cunique%$cudom+
4895: $cusymb%$cuname+
4896: $cusymb%$cudom+
4897: $cucourseid%$cuname+
4898: $cucourseid%$cudom+
4899: $cpart%$cuname+
4900: $cpart%$cudom);
4901: } else {
4902: $return.= ($cunique%$cuname+
4903: $cunique%$cudom+
4904: $cusymb%$cuname+
4905: $cusymb%$cudom+
4906: $cucourseid%$cuname+
4907: $cucourseid%$cudom);
4908: }
4909: return $return;
4910: }
4911:
4912: sub receipt {
4913: my ($part)=@_;
4914: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
4915: return &ireceipt($name,$domain,$courseid,$symb,$part);
4916: }
4917:
4918: # ------------------------------------------------------------ Serves up a file
4919: # returns either the contents of the file or
4920: # -1 if the file doesn't exist
4921: #
4922: # if the target is a file that was uploaded via DOCS,
4923: # a check will be made to see if a current copy exists on the local server,
4924: # if it does this will be served, otherwise a copy will be retrieved from
4925: # the home server for the course and stored in /home/httpd/html/userfiles on
4926: # the local server.
4927:
4928: sub getfile {
4929: my ($file,$caller) = @_;
4930:
4931: if ($file !~ m|^/*uploaded/(\w+)/(\w+)/(.+)$|) {
4932: # normal file from res space
4933: &repcopy($file);
4934: return &readfile($file);
4935: }
4936:
4937: my $info;
4938: my $cdom = $1;
4939: my $cnum = $2;
4940: my $filename = $3;
4941: my $path = $Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles';
4942: my ($lwpresp,$rtncode);
4943: my $localfile = $path.'/'.$cdom.'/'.$cnum.'/'.$filename;
4944: if (-e "$localfile") {
4945: my @fileinfo = stat($localfile);
4946: $lwpresp = &getuploaded('HEAD',$file,$cdom,$cnum,\$info,\$rtncode);
4947: if ($lwpresp ne 'ok') {
4948: if ($rtncode eq '404') {
4949: unlink($localfile);
4950: }
4951: #my $ua=new LWP::UserAgent;
4952: #my $request=new HTTP::Request('GET',&tokenwrapper($file));
4953: #my $response=$ua->request($request);
4954: #if ($response->is_success()) {
4955: # return $response->content;
4956: # } else {
4957: # return -1;
4958: # }
4959: return -1;
4960: }
4961: if ($info < $fileinfo[9]) {
4962: return &readfile($localfile);
4963: }
4964: $info = '';
4965: $lwpresp = &getuploaded('GET',$file,$cdom,$cnum,\$info,\$rtncode);
4966: if ($lwpresp ne 'ok') {
4967: return -1;
4968: }
4969: } else {
4970: $lwpresp = &getuploaded('GET',$file,$cdom,$cnum,\$info,\$rtncode);
4971: if ($lwpresp ne 'ok') {
4972: my $ua=new LWP::UserAgent;
4973: my $request=new HTTP::Request('GET',&tokenwrapper($file));
4974: my $response=$ua->request($request);
4975: if ($response->is_success()) {
4976: return $response->content;
4977: } else {
4978: return -1;
4979: }
4980: }
4981: my @parts = ($cdom,$cnum);
4982: if ($filename =~ m|^(.+)/[^/]+$|) {
4983: push @parts, split(/\//,$1);
4984: }
4985: foreach my $part (@parts) {
4986: $path .= '/'.$part;
4987: if (!-e $path) {
4988: mkdir($path,0770);
4989: }
4990: }
4991: }
4992: open (FILE,">$localfile");
4993: print FILE $info;
4994: close(FILE);
4995: if ($caller eq 'uploadrep') {
4996: return 'ok';
4997: }
4998: return $info;
4999: }
5000:
5001: sub tokenwrapper {
5002: my $uri=shift;
5003: $uri=~s/^http\:\/\/([^\/]+)//;
5004: $uri=~s/^\///;
5005: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
5006: my $token=$1;
5007: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
5008: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
5009: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
5010: (($uri=~/\?/)?'&':'?').'token='.$token.
5011: '&tokenissued='.$perlvar{'lonHostID'};
5012: } else {
5013: return '/adm/notfound.html';
5014: }
5015: }
5016:
5017: sub getuploaded {
5018: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
5019: $uri=~s/^\///;
5020: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
5021: my $ua=new LWP::UserAgent;
5022: my $request=new HTTP::Request($reqtype,$uri);
5023: my $response=$ua->request($request);
5024: $$rtncode = $response->code;
5025: if (! $response->is_success()) {
5026: return 'failed';
5027: }
5028: if ($reqtype eq 'HEAD') {
5029: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
5030: } elsif ($reqtype eq 'GET') {
5031: $$info = $response->content;
5032: }
5033: return 'ok';
5034: }
5035:
5036: sub readfile {
5037: my $file = shift;
5038: if ( (! -e $file ) || ($file eq '') ) { return -1; };
5039: my $fh;
5040: open($fh,"<$file");
5041: my $a='';
5042: while (<$fh>) { $a .=$_; }
5043: return $a;
5044: }
5045:
5046: sub filelocation {
5047: my ($dir,$file) = @_;
5048: my $location;
5049: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
5050: if ($file=~m:^/~:) { # is a contruction space reference
5051: $location = $file;
5052: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
5053: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
5054: $location=$file;
5055: } else {
5056: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5057: $file=~s:^/res/:/:;
5058: if ( !( $file =~ m:^/:) ) {
5059: $location = $dir. '/'.$file;
5060: } else {
5061: $location = '/home/httpd/html/res'.$file;
5062: }
5063: }
5064: $location=~s://+:/:g; # remove duplicate /
5065: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
5066: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
5067: return $location;
5068: }
5069:
5070: sub hreflocation {
5071: my ($dir,$file)=@_;
5072: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
5073: my $finalpath=filelocation($dir,$file);
5074: $finalpath=~s-^/home/httpd/html--;
5075: $finalpath=~s-^/home/(\w+)/public_html/-/~$1/-;
5076: return $finalpath;
5077: } elsif ($file=~m-^/home-) {
5078: $file=~s-^/home/httpd/html--;
5079: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
5080: return $file;
5081: }
5082: return $file;
5083: }
5084:
5085: sub current_machine_domains {
5086: my $hostname=$hostname{$perlvar{'lonHostID'}};
5087: my @domains;
5088: while( my($id, $name) = each(%hostname)) {
5089: # &logthis("-$id-$name-$hostname-");
5090: if ($hostname eq $name) {
5091: push(@domains,$hostdom{$id});
5092: }
5093: }
5094: return @domains;
5095: }
5096:
5097: sub current_machine_ids {
5098: my $hostname=$hostname{$perlvar{'lonHostID'}};
5099: my @ids;
5100: while( my($id, $name) = each(%hostname)) {
5101: # &logthis("-$id-$name-$hostname-");
5102: if ($hostname eq $name) {
5103: push(@ids,$id);
5104: }
5105: }
5106: return @ids;
5107: }
5108:
5109: # ------------------------------------------------------------- Declutters URLs
5110:
5111: sub declutter {
5112: my $thisfn=shift;
5113: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5114: $thisfn=~s/^\///;
5115: $thisfn=~s/^res\///;
5116: $thisfn=~s/\?.+$//;
5117: return $thisfn;
5118: }
5119:
5120: # ------------------------------------------------------------- Clutter up URLs
5121:
5122: sub clutter {
5123: my $thisfn='/'.&declutter(shift);
5124: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv|public)\//) {
5125: $thisfn='/res'.$thisfn;
5126: }
5127: return $thisfn;
5128: }
5129:
5130: # -------------------------------------------------------- Escape Special Chars
5131:
5132: sub escape {
5133: my $str=shift;
5134: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
5135: return $str;
5136: }
5137:
5138: # ----------------------------------------------------- Un-Escape Special Chars
5139:
5140: sub unescape {
5141: my $str=shift;
5142: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
5143: return $str;
5144: }
5145:
5146: sub mod_perl_version {
5147: if (defined($perlvar{'MODPERL2'})) {
5148: return 2;
5149: }
5150: return 1;
5151: }
5152:
5153: sub correct_line_ends {
5154: my ($result)=@_;
5155: $$result =~s/\r\n/\n/mg;
5156: $$result =~s/\r/\n/mg;
5157: }
5158: # ================================================================ Main Program
5159:
5160: sub goodbye {
5161: &logthis("Starting Shut down");
5162: #not converted to using infrastruture and probably shouldn't be
5163: &logthis(sprintf("%-20s is %s",'%badServerCache',scalar(%badServerCache)));
5164: #converted
5165: &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
5166: &logthis(sprintf("%-20s is %s",'%homecache',scalar(%homecache)));
5167: &logthis(sprintf("%-20s is %s",'%titlecache',scalar(%titlecache)));
5168: &logthis(sprintf("%-20s is %s",'%courseresdatacache',scalar(%courseresdatacache)));
5169: #1.1 only
5170: &logthis(sprintf("%-20s is %s",'%userresdatacache',scalar(%userresdatacache)));
5171: &logthis(sprintf("%-20s is %s",'%usectioncache',scalar(%usectioncache)));
5172: &logthis(sprintf("%-20s is %s",'%courseresversioncache',scalar(%courseresversioncache)));
5173: &logthis(sprintf("%-20s is %s",'%resversioncache',scalar(%resversioncache)));
5174: &flushcourselogs();
5175: &logthis("Shutting down");
5176: return DONE;
5177: }
5178:
5179: BEGIN {
5180: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
5181: unless ($readit) {
5182: {
5183: open(my $config,"</etc/httpd/conf/loncapa.conf");
5184:
5185: while (my $configline=<$config>) {
5186: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
5187: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5188: chomp($varvalue);
5189: $perlvar{$varname}=$varvalue;
5190: }
5191: }
5192: close($config);
5193: }
5194: {
5195: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
5196:
5197: while (my $configline=<$config>) {
5198: if ($configline =~ /^[^\#]*PerlSetVar/) {
5199: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5200: chomp($varvalue);
5201: $perlvar{$varname}=$varvalue;
5202: }
5203: }
5204: close($config);
5205: }
5206:
5207: # ------------------------------------------------------------ Read domain file
5208: {
5209: %domaindescription = ();
5210: %domain_auth_def = ();
5211: %domain_auth_arg_def = ();
5212: my $fh;
5213: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
5214: while (<$fh>) {
5215: next if (/^(\#|\s*$)/);
5216: # next if /^\#/;
5217: chomp;
5218: my ($domain, $domain_description, $def_auth, $def_auth_arg,
5219: $def_lang, $city, $longi, $lati) = split(/:/,$_);
5220: $domain_auth_def{$domain}=$def_auth;
5221: $domain_auth_arg_def{$domain}=$def_auth_arg;
5222: $domaindescription{$domain}=$domain_description;
5223: $domain_lang_def{$domain}=$def_lang;
5224: $domain_city{$domain}=$city;
5225: $domain_longi{$domain}=$longi;
5226: $domain_lati{$domain}=$lati;
5227:
5228: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
5229: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
5230: }
5231: }
5232: close ($fh);
5233: }
5234:
5235:
5236: # ------------------------------------------------------------- Read hosts file
5237: {
5238: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
5239:
5240: while (my $configline=<$config>) {
5241: next if ($configline =~ /^(\#|\s*$)/);
5242: chomp($configline);
5243: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
5244: if ($id && $domain && $role && $name && $ip) {
5245: $hostname{$id}=$name;
5246: $hostdom{$id}=$domain;
5247: $hostip{$id}=$ip;
5248: $iphost{$ip}=$id;
5249: if ($role eq 'library') { $libserv{$id}=$name; }
5250: } else {
5251: if ($configline) {
5252: &logthis("Skipping hosts.tab line -$configline-");
5253: }
5254: }
5255: }
5256: close($config);
5257: }
5258:
5259: # ------------------------------------------------------ Read spare server file
5260: {
5261: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
5262:
5263: while (my $configline=<$config>) {
5264: chomp($configline);
5265: if ($configline) {
5266: $spareid{$configline}=1;
5267: }
5268: }
5269: close($config);
5270: }
5271: # ------------------------------------------------------------ Read permissions
5272: {
5273: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
5274:
5275: while (my $configline=<$config>) {
5276: chomp($configline);
5277: if ($configline) {
5278: my ($role,$perm)=split(/ /,$configline);
5279: if ($perm ne '') { $pr{$role}=$perm; }
5280: }
5281: }
5282: close($config);
5283: }
5284:
5285: # -------------------------------------------- Read plain texts for permissions
5286: {
5287: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
5288:
5289: while (my $configline=<$config>) {
5290: chomp($configline);
5291: if ($configline) {
5292: my ($short,$plain)=split(/:/,$configline);
5293: if ($plain ne '') { $prp{$short}=$plain; }
5294: }
5295: }
5296: close($config);
5297: }
5298:
5299: # ---------------------------------------------------------- Read package table
5300: {
5301: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
5302:
5303: while (my $configline=<$config>) {
5304: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
5305: chomp($configline);
5306: my ($short,$plain)=split(/:/,$configline);
5307: my ($pack,$name)=split(/\&/,$short);
5308: if ($plain ne '') {
5309: $packagetab{$pack.'&'.$name.'&name'}=$name;
5310: $packagetab{$short}=$plain;
5311: }
5312: }
5313: close($config);
5314: }
5315:
5316: # ------------- set up temporary directory
5317: {
5318: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
5319:
5320: }
5321:
5322: %metacache=();
5323:
5324: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
5325: $dumpcount=0;
5326:
5327: &logtouch();
5328: &logthis('<font color=yellow>INFO: Read configuration</font>');
5329: $readit=1;
5330: }
5331: }
5332:
5333: 1;
5334: __END__
5335:
5336: =pod
5337:
5338: =head1 NAME
5339:
5340: Apache::lonnet - Subroutines to ask questions about things in the network.
5341:
5342: =head1 SYNOPSIS
5343:
5344: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
5345:
5346: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
5347:
5348: Common parameters:
5349:
5350: =over 4
5351:
5352: =item *
5353:
5354: $uname : an internal username (if $cname expecting a course Id specifically)
5355:
5356: =item *
5357:
5358: $udom : a domain (if $cdom expecting a course's domain specifically)
5359:
5360: =item *
5361:
5362: $symb : a resource instance identifier
5363:
5364: =item *
5365:
5366: $namespace : the name of a .db file that contains the data needed or
5367: being set.
5368:
5369: =back
5370:
5371: =head1 OVERVIEW
5372:
5373: lonnet provides subroutines which interact with the
5374: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
5375: about classes, users, and resources.
5376:
5377: For many of these objects you can also use this to store data about
5378: them or modify them in various ways.
5379:
5380: =head2 Symbs
5381:
5382: To identify a specific instance of a resource, LON-CAPA uses symbols
5383: or "symbs"X<symb>. These identifiers are built from the URL of the
5384: map, the resource number of the resource in the map, and the URL of
5385: the resource itself. The latter is somewhat redundant, but might help
5386: if maps change.
5387:
5388: An example is
5389:
5390: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
5391:
5392: The respective map entry is
5393:
5394: <resource id="19" src="/res/msu/korte/tests/part12.problem"
5395: title="Problem 2">
5396: </resource>
5397:
5398: Symbs are used by the random number generator, as well as to store and
5399: restore data specific to a certain instance of for example a problem.
5400:
5401: =head2 Storing And Retrieving Data
5402:
5403: X<store()>X<cstore()>X<restore()>Three of the most important functions
5404: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
5405: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
5406: is is the non-critical message twin of cstore. These functions are for
5407: handlers to store a perl hash to a user's permanent data space in an
5408: easy manner, and to retrieve it again on another call. It is expected
5409: that a handler would use this once at the beginning to retrieve data,
5410: and then again once at the end to send only the new data back.
5411:
5412: The data is stored in the user's data directory on the user's
5413: homeserver under the ID of the course.
5414:
5415: The hash that is returned by restore will have all of the previous
5416: value for all of the elements of the hash.
5417:
5418: Example:
5419:
5420: #creating a hash
5421: my %hash;
5422: $hash{'foo'}='bar';
5423:
5424: #storing it
5425: &Apache::lonnet::cstore(\%hash);
5426:
5427: #changing a value
5428: $hash{'foo'}='notbar';
5429:
5430: #adding a new value
5431: $hash{'bar'}='foo';
5432: &Apache::lonnet::cstore(\%hash);
5433:
5434: #retrieving the hash
5435: my %history=&Apache::lonnet::restore();
5436:
5437: #print the hash
5438: foreach my $key (sort(keys(%history))) {
5439: print("\%history{$key} = $history{$key}");
5440: }
5441:
5442: Will print out:
5443:
5444: %history{1:foo} = bar
5445: %history{1:keys} = foo:timestamp
5446: %history{1:timestamp} = 990455579
5447: %history{2:bar} = foo
5448: %history{2:foo} = notbar
5449: %history{2:keys} = foo:bar:timestamp
5450: %history{2:timestamp} = 990455580
5451: %history{bar} = foo
5452: %history{foo} = notbar
5453: %history{timestamp} = 990455580
5454: %history{version} = 2
5455:
5456: Note that the special hash entries C<keys>, C<version> and
5457: C<timestamp> were added to the hash. C<version> will be equal to the
5458: total number of versions of the data that have been stored. The
5459: C<timestamp> attribute will be the UNIX time the hash was
5460: stored. C<keys> is available in every historical section to list which
5461: keys were added or changed at a specific historical revision of a
5462: hash.
5463:
5464: B<Warning>: do not store the hash that restore returns directly. This
5465: will cause a mess since it will restore the historical keys as if the
5466: were new keys. I.E. 1:foo will become 1:1:foo etc.
5467:
5468: Calling convention:
5469:
5470: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
5471: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
5472:
5473: For more detailed information, see lonnet specific documentation.
5474:
5475: =head1 RETURN MESSAGES
5476:
5477: =over 4
5478:
5479: =item * B<con_lost>: unable to contact remote host
5480:
5481: =item * B<con_delayed>: unable to contact remote host, message will be delivered
5482: when the connection is brought back up
5483:
5484: =item * B<con_failed>: unable to contact remote host and unable to save message
5485: for later delivery
5486:
5487: =item * B<error:>: an error a occured, a description of the error follows the :
5488:
5489: =item * B<no_such_host>: unable to fund a host associated with the user/domain
5490: that was requested
5491:
5492: =back
5493:
5494: =head1 PUBLIC SUBROUTINES
5495:
5496: =head2 Session Environment Functions
5497:
5498: =over 4
5499:
5500: =item *
5501: X<appenv()>
5502: B<appenv(%hash)>: the value of %hash is written to
5503: the user envirnoment file, and will be restored for each access this
5504: user makes during this session, also modifies the %ENV for the current
5505: process
5506:
5507: =item *
5508: X<delenv()>
5509: B<delenv($regexp)>: removes all items from the session
5510: environment file that matches the regular expression in $regexp. The
5511: values are also delted from the current processes %ENV.
5512:
5513: =back
5514:
5515: =head2 User Information
5516:
5517: =over 4
5518:
5519: =item *
5520: X<queryauthenticate()>
5521: B<queryauthenticate($uname,$udom)>: try to determine user's current
5522: authentication scheme
5523:
5524: =item *
5525: X<authenticate()>
5526: B<authenticate($uname,$upass,$udom)>: try to
5527: authenticate user from domain's lib servers (first use the current
5528: one). C<$upass> should be the users password.
5529:
5530: =item *
5531: X<homeserver()>
5532: B<homeserver($uname,$udom)>: find the server which has
5533: the user's directory and files (there must be only one), this caches
5534: the answer, and also caches if there is a borken connection.
5535:
5536: =item *
5537: X<idget()>
5538: B<idget($udom,@ids)>: find the usernames behind a list of IDs
5539: (IDs are a unique resource in a domain, there must be only 1 ID per
5540: username, and only 1 username per ID in a specific domain) (returns
5541: hash: id=>name,id=>name)
5542:
5543: =item *
5544: X<idrget()>
5545: B<idrget($udom,@unames)>: find the IDs behind a list of
5546: usernames (returns hash: name=>id,name=>id)
5547:
5548: =item *
5549: X<idput()>
5550: B<idput($udom,%ids)>: store away a list of names and associated IDs
5551:
5552: =item *
5553: X<rolesinit()>
5554: B<rolesinit($udom,$username,$authhost)>: get user privileges
5555:
5556: =item *
5557: X<usection()>
5558: B<usection($udom,$uname,$cname)>: finds the section of student in the
5559: course $cname, return section name/number or '' for "not in course"
5560: and '-1' for "no section"
5561:
5562: =item *
5563: X<userenvironment()>
5564: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
5565: passed in @what from the requested user's environment, returns a hash
5566:
5567: =back
5568:
5569: =head2 User Roles
5570:
5571: =over 4
5572:
5573: =item *
5574:
5575: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
5576: actions
5577: F: full access
5578: U,I,K: authentication modes (cxx only)
5579: '': forbidden
5580: 1: user needs to choose course
5581: 2: browse allowed
5582:
5583: =item *
5584:
5585: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
5586: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
5587: and course level
5588:
5589: =item *
5590:
5591: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
5592: explanation of a user role term
5593:
5594: =back
5595:
5596: =head2 User Modification
5597:
5598: =over 4
5599:
5600: =item *
5601:
5602: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
5603: user for the level given by URL. Optional start and end dates (leave empty
5604: string or zero for "no date")
5605:
5606: =item *
5607:
5608: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
5609: change a users, password, possible return values are: ok,
5610: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
5611: refused
5612:
5613: =item *
5614:
5615: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
5616:
5617: =item *
5618:
5619: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
5620: modify user
5621:
5622: =item *
5623:
5624: modifystudent
5625:
5626: modify a students enrollment and identification information.
5627: The course id is resolved based on the current users environment.
5628: This means the envoking user must be a course coordinator or otherwise
5629: associated with a course.
5630:
5631: This call is essentially a wrapper for lonnet::modifyuser and
5632: lonnet::modify_student_enrollment
5633:
5634: Inputs:
5635:
5636: =over 4
5637:
5638: =item B<$udom> Students loncapa domain
5639:
5640: =item B<$uname> Students loncapa login name
5641:
5642: =item B<$uid> Students id/student number
5643:
5644: =item B<$umode> Students authentication mode
5645:
5646: =item B<$upass> Students password
5647:
5648: =item B<$first> Students first name
5649:
5650: =item B<$middle> Students middle name
5651:
5652: =item B<$last> Students last name
5653:
5654: =item B<$gene> Students generation
5655:
5656: =item B<$usec> Students section in course
5657:
5658: =item B<$end> Unix time of the roles expiration
5659:
5660: =item B<$start> Unix time of the roles start date
5661:
5662: =item B<$forceid> If defined, allow $uid to be changed
5663:
5664: =item B<$desiredhome> server to use as home server for student
5665:
5666: =back
5667:
5668: =item *
5669:
5670: modify_student_enrollment
5671:
5672: Change a students enrollment status in a class. The environment variable
5673: 'role.request.course' must be defined for this function to proceed.
5674:
5675: Inputs:
5676:
5677: =over 4
5678:
5679: =item $udom, students domain
5680:
5681: =item $uname, students name
5682:
5683: =item $uid, students user id
5684:
5685: =item $first, students first name
5686:
5687: =item $middle
5688:
5689: =item $last
5690:
5691: =item $gene
5692:
5693: =item $usec
5694:
5695: =item $end
5696:
5697: =item $start
5698:
5699: =back
5700:
5701:
5702: =item *
5703:
5704: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
5705: custom role; give a custom role to a user for the level given by URL. Specify
5706: name and domain of role author, and role name
5707:
5708: =item *
5709:
5710: revokerole($udom,$uname,$url,$role) : revoke a role for url
5711:
5712: =item *
5713:
5714: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
5715:
5716: =back
5717:
5718: =head2 Course Infomation
5719:
5720: =over 4
5721:
5722: =item *
5723:
5724: coursedescription($courseid) : course description
5725:
5726: =item *
5727:
5728: courseresdata($coursenum,$coursedomain,@which) : request for current
5729: parameter setting for a specific course, @what should be a list of
5730: parameters to ask about. This routine caches answers for 5 minutes.
5731:
5732: =back
5733:
5734: =head2 Course Modification
5735:
5736: =over 4
5737:
5738: =item *
5739:
5740: writecoursepref($courseid,%prefs) : write preferences (environment
5741: database) for a course
5742:
5743: =item *
5744:
5745: createcourse($udom,$description,$url) : make/modify course
5746:
5747: =back
5748:
5749: =head2 Resource Subroutines
5750:
5751: =over 4
5752:
5753: =item *
5754:
5755: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
5756:
5757: =item *
5758:
5759: repcopy($filename) : subscribes to the requested file, and attempts to
5760: replicate from the owning library server, Might return
5761: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
5762: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
5763: resource. Expects the local filesystem pathname
5764: (/home/httpd/html/res/....)
5765:
5766: =back
5767:
5768: =head2 Resource Information
5769:
5770: =over 4
5771:
5772: =item *
5773:
5774: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
5775: a vairety of different possible values, $varname should be a request
5776: string, and the other parameters can be used to specify who and what
5777: one is asking about.
5778:
5779: Possible values for $varname are environment.lastname (or other item
5780: from the envirnment hash), user.name (or someother aspect about the
5781: user), resource.0.maxtries (or some other part and parameter of a
5782: resource)
5783:
5784: =item *
5785:
5786: directcondval($number) : get current value of a condition; reads from a state
5787: string
5788:
5789: =item *
5790:
5791: condval($condidx) : value of condition index based on state
5792:
5793: =item *
5794:
5795: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
5796: resource's metadata, $what should be either a specific key, or either
5797: 'keys' (to get a list of possible keys) or 'packages' to get a list of
5798: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
5799:
5800: this function automatically caches all requests
5801:
5802: =item *
5803:
5804: metadata_query($query,$custom,$customshow) : make a metadata query against the
5805: network of library servers; returns file handle of where SQL and regex results
5806: will be stored for query
5807:
5808: =item *
5809:
5810: symbread($filename) : return symbolic list entry (filename argument optional);
5811: returns the data handle
5812:
5813: =item *
5814:
5815: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
5816: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
5817: failure, user must be in a course, as it assumes the existance of the
5818: course initi hash, and uses $ENV('request.course.id'}
5819:
5820:
5821: =item *
5822:
5823: symbclean($symb) : removes versions numbers from a symb, returns the
5824: cleaned symb
5825:
5826: =item *
5827:
5828: is_on_map($uri) : checks if the $uri is somewhere on the current
5829: course map, user must be in a course for it to work.
5830:
5831: =item *
5832:
5833: numval($salt) : return random seed value (addend for rndseed)
5834:
5835: =item *
5836:
5837: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
5838: a random seed, all arguments are optional, if they aren't sent it uses the
5839: environment to derive them. Note: if symb isn't sent and it can't get one
5840: from &symbread it will use the current time as its return value
5841:
5842: =item *
5843:
5844: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
5845: unfakeable, receipt
5846:
5847: =item *
5848:
5849: receipt() : API to ireceipt working off of ENV values; given out to users
5850:
5851: =item *
5852:
5853: countacc($url) : count the number of accesses to a given URL
5854:
5855: =item *
5856:
5857: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
5858:
5859: =item *
5860:
5861: checkin($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 $tcrsid)
5862:
5863: =item *
5864:
5865: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
5866:
5867: =item *
5868:
5869: devalidate($symb) : devalidate temporary spreadsheet calculations,
5870: forcing spreadsheet to reevaluate the resource scores next time.
5871:
5872: =back
5873:
5874: =head2 Storing/Retreiving Data
5875:
5876: =over 4
5877:
5878: =item *
5879:
5880: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
5881: for this url; hashref needs to be given and should be a \%hashname; the
5882: remaining args aren't required and if they aren't passed or are '' they will
5883: be derived from the ENV
5884:
5885: =item *
5886:
5887: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
5888: uses critical subroutine
5889:
5890: =item *
5891:
5892: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
5893: all args are optional
5894:
5895: =item *
5896:
5897: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
5898: works very similar to store/cstore, but all data is stored in a
5899: temporary location and can be reset using tmpreset, $storehash should
5900: be a hash reference, returns nothing on success
5901:
5902: =item *
5903:
5904: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
5905: similar to restore, but all data is stored in a temporary location and
5906: can be reset using tmpreset. Returns a hash of values on success,
5907: error string otherwise.
5908:
5909: =item *
5910:
5911: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
5912: deltes all keys for $symb form the temporary storage hash.
5913:
5914: =item *
5915:
5916: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5917: reference filled in from namesp ($udom and $uname are optional)
5918:
5919: =item *
5920:
5921: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
5922: namesp ($udom and $uname are optional)
5923:
5924: =item *
5925:
5926: dump($namespace,$udom,$uname,$regexp) :
5927: dumps the complete (or key matching regexp) namespace into a hash
5928: ($udom, $uname and $regexp are optional)
5929:
5930: =item *
5931:
5932: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
5933: $store can be a scalar, an array reference, or if the amount to be
5934: incremented is > 1, a hash reference.
5935:
5936: ($udom and $uname are optional)
5937:
5938: =item *
5939:
5940: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
5941: ($udom and $uname are optional)
5942:
5943: =item *
5944:
5945: putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
5946: keys used in storehash include version information (e.g., 1:$symb:message etc.) as
5947: used in records written by &store and retrieved by &restore. This function
5948: was created for use in editing discussion posts, without incrementing the
5949: version number included in the key for a particular post. The colon
5950: separated list of attribute names (e.g., the value associated with the key
5951: 1:keys:$symb) is also generated and passed in the ampersand separated
5952: items sent to lonnet::reply().
5953:
5954: =item *
5955:
5956: cput($namespace,$storehash,$udom,$uname) : critical put
5957: ($udom and $uname are optional)
5958:
5959: =item *
5960:
5961: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5962: reference filled in from namesp (encrypts the return communication)
5963: ($udom and $uname are optional)
5964:
5965: =item *
5966:
5967: log($udom,$name,$home,$message) : write to permanent log for user; use
5968: critical subroutine
5969:
5970: =back
5971:
5972: =head2 Network Status Functions
5973:
5974: =over 4
5975:
5976: =item *
5977:
5978: dirlist($uri) : return directory list based on URI
5979:
5980: =item *
5981:
5982: spareserver() : find server with least workload from spare.tab
5983:
5984: =back
5985:
5986: =head2 Apache Request
5987:
5988: =over 4
5989:
5990: =item *
5991:
5992: ssi($url,%hash) : server side include, does a complete request cycle on url to
5993: localhost, posts hash
5994:
5995: =back
5996:
5997: =head2 Data to String to Data
5998:
5999: =over 4
6000:
6001: =item *
6002:
6003: hash2str(%hash) : convert a hash into a string complete with escaping and '='
6004: and '&' separators, supports elements that are arrayrefs and hashrefs
6005:
6006: =item *
6007:
6008: hashref2str($hashref) : convert a hashref into a string complete with
6009: escaping and '=' and '&' separators, supports elements that are
6010: arrayrefs and hashrefs
6011:
6012: =item *
6013:
6014: arrayref2str($arrayref) : convert an arrayref into a string complete
6015: with escaping and '&' separators, supports elements that are arrayrefs
6016: and hashrefs
6017:
6018: =item *
6019:
6020: str2hash($string) : convert string to hash using unescaping and
6021: splitting on '=' and '&', supports elements that are arrayrefs and
6022: hashrefs
6023:
6024: =item *
6025:
6026: str2array($string) : convert string to hash using unescaping and
6027: splitting on '&', supports elements that are arrayrefs and hashrefs
6028:
6029: =back
6030:
6031: =head2 Logging Routines
6032:
6033: =over 4
6034:
6035: These routines allow one to make log messages in the lonnet.log and
6036: lonnet.perm logfiles.
6037:
6038: =item *
6039:
6040: logtouch() : make sure the logfile, lonnet.log, exists
6041:
6042: =item *
6043:
6044: logthis() : append message to the normal lonnet.log file, it gets
6045: preiodically rolled over and deleted.
6046:
6047: =item *
6048:
6049: logperm() : append a permanent message to lonnet.perm.log, this log
6050: file never gets deleted by any automated portion of the system, only
6051: messages of critical importance should go in here.
6052:
6053: =back
6054:
6055: =head2 General File Helper Routines
6056:
6057: =over 4
6058:
6059: =item *
6060:
6061: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
6062: (a) files in /uploaded
6063: (i) If a local copy of the file exists -
6064: compares modification date of local copy with last-modified date for
6065: definitive version stored on home server for course. If local copy is
6066: stale, requests a new version from the home server and stores it.
6067: If the original has been removed from the home server, then local copy
6068: is unlinked.
6069: (ii) If local copy does not exist -
6070: requests the file from the home server and stores it.
6071:
6072: If $caller is 'uploadrep':
6073: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
6074: for request for files originally uploaded via DOCS.
6075: - returns 'ok' if fresh local copy now available, -1 otherwise.
6076:
6077: Otherwise:
6078: This indicates a call from the content generation phase of the request.
6079: - returns the entire contents of the file or -1.
6080:
6081: (b) files in /res
6082: - returns the entire contents of a file or -1;
6083: it properly subscribes to and replicates the file if neccessary.
6084:
6085: =item *
6086:
6087: filelocation($dir,$file) : returns file system location of a file
6088: based on URI; meant to be "fairly clean" absolute reference, $dir is a
6089: directory that relative $file lookups are to looked in ($dir of /a/dir
6090: and a file of ../bob will become /a/bob)
6091:
6092: =item *
6093:
6094: hreflocation($dir,$file) : returns file system location or a URL; same as
6095: filelocation except for hrefs
6096:
6097: =item *
6098:
6099: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
6100:
6101: =back
6102:
6103: =head2 HTTP Helper Routines
6104:
6105: =over 4
6106:
6107: =item *
6108:
6109: escape() : unpack non-word characters into CGI-compatible hex codes
6110:
6111: =item *
6112:
6113: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
6114:
6115: =back
6116:
6117: =head1 PRIVATE SUBROUTINES
6118:
6119: =head2 Underlying communication routines (Shouldn't call)
6120:
6121: =over 4
6122:
6123: =item *
6124:
6125: subreply() : tries to pass a message to lonc, returns con_lost if incapable
6126:
6127: =item *
6128:
6129: reply() : uses subreply to send a message to remote machine, logs all failures
6130:
6131: =item *
6132:
6133: critical() : passes a critical message to another server; if cannot
6134: get through then place message in connection buffer directory and
6135: returns con_delayed, if incapable of saving message, returns
6136: con_failed
6137:
6138: =item *
6139:
6140: reconlonc() : tries to reconnect lonc client processes.
6141:
6142: =back
6143:
6144: =head2 Resource Access Logging
6145:
6146: =over 4
6147:
6148: =item *
6149:
6150: flushcourselogs() : flush (save) buffer logs and access logs
6151:
6152: =item *
6153:
6154: courselog($what) : save message for course in hash
6155:
6156: =item *
6157:
6158: courseacclog($what) : save message for course using &courselog(). Perform
6159: special processing for specific resource types (problems, exams, quizzes, etc).
6160:
6161: =item *
6162:
6163: goodbye() : flush course logs and log shutting down; it is called in srm.conf
6164: as a PerlChildExitHandler
6165:
6166: =back
6167:
6168: =head2 Other
6169:
6170: =over 4
6171:
6172: =item *
6173:
6174: symblist($mapname,%newhash) : update symbolic storage links
6175:
6176: =back
6177:
6178: =cut
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