1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.548 2004/09/27 19:00:16 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 qw( gettimeofday tv_interval );
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) && $end && ($now > $end)) {
799: $Expired{$end}=$section;
800: next;
801: }
802: if (defined($start) && $start && ($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 $disk_caching_disabled=0;
825:
826: sub devalidate_cache {
827: my ($cache,$id,$name) = @_;
828: delete $$cache{$id.'.time'};
829: delete $$cache{$id.'.file'};
830: delete $$cache{$id};
831: if (1 || $disk_caching_disabled) { return; }
832: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
833: if (!-e $filename) { return; }
834: open(DB,">$filename.lock");
835: flock(DB,LOCK_EX);
836: my %hash;
837: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
838: eval <<'EVALBLOCK';
839: delete($hash{$id});
840: delete($hash{$id.'.time'});
841: EVALBLOCK
842: if ($@) {
843: &logthis("<font color='red'>devalidate_cache blew up :$@:$name</font>");
844: unlink($filename);
845: }
846: } else {
847: if (-e $filename) {
848: &logthis("Unable to tie hash (devalidate cache): $name");
849: unlink($filename);
850: }
851: }
852: untie(%hash);
853: flock(DB,LOCK_UN);
854: close(DB);
855: }
856:
857: sub is_cached {
858: my ($cache,$id,$name,$time) = @_;
859: if (!$time) { $time=300; }
860: if (!exists($$cache{$id.'.time'})) {
861: &load_cache_item($cache,$name,$id,$time);
862: }
863: if (!exists($$cache{$id.'.time'})) {
864: # &logthis("Didn't find $id");
865: return (undef,undef);
866: } else {
867: if (time-($$cache{$id.'.time'})>$time) {
868: if (exists($$cache{$id.'.file'})) {
869: foreach my $filename (@{ $$cache{$id.'.file'} }) {
870: my $mtime=(stat($filename))[9];
871: #+1 is to take care of edge effects
872: if ($mtime && (($mtime+1) < ($$cache{$id.'.time'}))) {
873: # &logthis("Upping $mtime - ".$$cache{$id.'.time'}.
874: # "$id because of $filename");
875: } else {
876: &logthis("Devalidating $filename $id - ".(time-($$cache{$id.'.time'})));
877: &devalidate_cache($cache,$id,$name);
878: return (undef,undef);
879: }
880: }
881: $$cache{$id.'.time'}=time;
882: } else {
883: # &logthis("Devalidating $id - ".time-($$cache{$id.'.time'}));
884: &devalidate_cache($cache,$id,$name);
885: return (undef,undef);
886: }
887: }
888: }
889: return ($$cache{$id},1);
890: }
891:
892: sub do_cache {
893: my ($cache,$id,$value,$name) = @_;
894: $$cache{$id.'.time'}=time;
895: $$cache{$id}=$value;
896: # &logthis("Caching $id as :$value:");
897: &save_cache_item($cache,$name,$id);
898: # do_cache implictly return the set value
899: $$cache{$id};
900: }
901:
902: my %do_save_item;
903: my %do_save;
904: sub save_cache_item {
905: my ($cache,$name,$id)=@_;
906: if ($disk_caching_disabled) { return; }
907: $do_save{$name}=$cache;
908: if (!exists($do_save_item{$name})) { $do_save_item{$name}={} }
909: $do_save_item{$name}->{$id}=1;
910: return;
911: }
912:
913: sub save_cache {
914: if ($disk_caching_disabled) { return; }
915: my ($cache,$name,$id);
916: foreach $name (keys(%do_save)) {
917: $cache=$do_save{$name};
918:
919: my $starttime=&Time::HiRes::time();
920: &logthis("Saving :$name:");
921: my %hash;
922: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
923: open(DB,">$filename.lock");
924: flock(DB,LOCK_EX);
925: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
926: foreach $id (keys(%{ $do_save_item{$name} })) {
927: eval <<'EVALBLOCK';
928: $hash{$id.'.time'}=$$cache{$id.'.time'};
929: $hash{$id}=freeze({'item'=>$$cache{$id}});
930: if (exists($$cache{$id.'.file'})) {
931: $hash{$id.'.file'}=freeze({'item'=>$$cache{$id.'.file'}});
932: }
933: EVALBLOCK
934: if ($@) {
935: &logthis("<font color='red'>save_cache blew up :$@:$name</font>");
936: unlink($filename);
937: last;
938: }
939: }
940: } else {
941: if (-e $filename) {
942: &logthis("Unable to tie hash (save cache): $name ($!)");
943: unlink($filename);
944: }
945: }
946: untie(%hash);
947: flock(DB,LOCK_UN);
948: close(DB);
949: &logthis("save_cache $name took ".(&Time::HiRes::time()-$starttime));
950: }
951: undef(%do_save);
952: undef(%do_save_item);
953:
954: }
955:
956: sub load_cache_item {
957: my ($cache,$name,$id,$time)=@_;
958: if ($disk_caching_disabled) { return; }
959: my $starttime=&Time::HiRes::time();
960: # &logthis("Before Loading $name for $id size is ".scalar(%$cache));
961: my %hash;
962: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
963: if (!-e $filename) { return; }
964: open(DB,">$filename.lock");
965: flock(DB,LOCK_SH);
966: if (tie(%hash,'GDBM_File',$filename,&GDBM_READER(),0640)) {
967: eval <<'EVALBLOCK';
968: if (!%$cache) {
969: my $count;
970: while (my ($key,$value)=each(%hash)) {
971: $count++;
972: if ($key =~ /\.time$/) {
973: $$cache{$key}=$value;
974: } else {
975: my $hashref=thaw($value);
976: $$cache{$key}=$hashref->{'item'};
977: }
978: }
979: # &logthis("Initial load: $count");
980: } else {
981: if (($$cache{$id.'.time'}+$time) < time) {
982: $$cache{$id.'.time'}=$hash{$id.'.time'};
983: {
984: my $hashref=thaw($hash{$id});
985: $$cache{$id}=$hashref->{'item'};
986: }
987: if (exists($hash{$id.'.file'})) {
988: my $hashref=thaw($hash{$id.'.file'});
989: $$cache{$id.'.file'}=$hashref->{'item'};
990: }
991: }
992: }
993: EVALBLOCK
994: if ($@) {
995: &logthis("<font color='red'>load_cache blew up :$@:$name</font>");
996: unlink($filename);
997: }
998: } else {
999: if (-e $filename) {
1000: &logthis("Unable to tie hash (load cache item): $name ($!)");
1001: unlink($filename);
1002: }
1003: }
1004: untie(%hash);
1005: flock(DB,LOCK_UN);
1006: close(DB);
1007: # &logthis("After Loading $name size is ".scalar(%$cache));
1008: # &logthis("load_cache_item $name took ".(&Time::HiRes::time()-$starttime));
1009: }
1010:
1011: sub usection {
1012: my ($udom,$unam,$courseid)=@_;
1013: my $hashid="$udom:$unam:$courseid";
1014:
1015: my ($result,$cached)=&is_cached(\%usectioncache,$hashid,'usection');
1016: if (defined($cached)) { return $result; }
1017: $courseid=~s/\_/\//g;
1018: $courseid=~s/^(\w)/\/$1/;
1019: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
1020: &homeserver($unam,$udom)))) {
1021: my ($key,$value)=split(/\=/,$_);
1022: $key=&unescape($key);
1023: if ($key=~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/) {
1024: my $section=$1;
1025: if ($key eq $courseid.'_st') { $section=''; }
1026: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
1027: my $now=time;
1028: my $notactive=0;
1029: if ($start) {
1030: if ($now<$start) { $notactive=1; }
1031: }
1032: if ($end) {
1033: if ($now>$end) { $notactive=1; }
1034: }
1035: unless ($notactive) {
1036: return &do_cache(\%usectioncache,$hashid,$section,'usection');
1037: }
1038: }
1039: }
1040: return &do_cache(\%usectioncache,$hashid,'-1','usection');
1041: }
1042:
1043: # ------------------------------------- Read an entry from a user's environment
1044:
1045: sub userenvironment {
1046: my ($udom,$unam,@what)=@_;
1047: my %returnhash=();
1048: my @answer=split(/\&/,
1049: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1050: &homeserver($unam,$udom)));
1051: my $i;
1052: for ($i=0;$i<=$#what;$i++) {
1053: $returnhash{$what[$i]}=&unescape($answer[$i]);
1054: }
1055: return %returnhash;
1056: }
1057:
1058: # -------------------------------------------------------------------- New chat
1059:
1060: sub chatsend {
1061: my ($newentry,$anon)=@_;
1062: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1063: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1064: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1065: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1066: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
1067: &escape($newentry)),$chome);
1068: }
1069:
1070: # ------------------------------------------ Find current version of a resource
1071:
1072: sub getversion {
1073: my $fname=&clutter(shift);
1074: unless ($fname=~/^\/res\//) { return -1; }
1075: return ¤tversion(&filelocation('',$fname));
1076: }
1077:
1078: sub currentversion {
1079: my $fname=shift;
1080: my ($result,$cached)=&is_cached(\%resversioncache,$fname,'resversion',600);
1081: if (defined($cached)) { return $result; }
1082: my $author=$fname;
1083: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1084: my ($udom,$uname)=split(/\//,$author);
1085: my $home=homeserver($uname,$udom);
1086: if ($home eq 'no_host') {
1087: return -1;
1088: }
1089: my $answer=reply("currentversion:$fname",$home);
1090: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1091: return -1;
1092: }
1093: return &do_cache(\%resversioncache,$fname,$answer,'resversion');
1094: }
1095:
1096: # ----------------------------- Subscribe to a resource, return URL if possible
1097:
1098: sub subscribe {
1099: my $fname=shift;
1100: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1101: $fname=~s/[\n\r]//g;
1102: my $author=$fname;
1103: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1104: my ($udom,$uname)=split(/\//,$author);
1105: my $home=homeserver($uname,$udom);
1106: if ($home eq 'no_host') {
1107: return 'not_found';
1108: }
1109: my $answer=reply("sub:$fname",$home);
1110: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1111: $answer.=' by '.$home;
1112: }
1113: return $answer;
1114: }
1115:
1116: # -------------------------------------------------------------- Replicate file
1117:
1118: sub repcopy {
1119: my $filename=shift;
1120: $filename=~s/\/+/\//g;
1121: if ($filename=~m|^/home/httpd/html/adm/|) { return OK; }
1122: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return OK; }
1123: if ($filename=~m|^/home/httpd/html/userfiles/| or
1124: $filename=~m|^/*uploaded/|) {
1125: return &repcopy_userfile($filename);
1126: }
1127: $filename=~s/[\n\r]//g;
1128: my $transname="$filename.in.transfer";
1129: if ((-e $filename) || (-e $transname)) { return OK; }
1130: my $remoteurl=subscribe($filename);
1131: if ($remoteurl =~ /^con_lost by/) {
1132: &logthis("Subscribe returned $remoteurl: $filename");
1133: return HTTP_SERVICE_UNAVAILABLE;
1134: } elsif ($remoteurl eq 'not_found') {
1135: #&logthis("Subscribe returned not_found: $filename");
1136: return HTTP_NOT_FOUND;
1137: } elsif ($remoteurl =~ /^rejected by/) {
1138: &logthis("Subscribe returned $remoteurl: $filename");
1139: return FORBIDDEN;
1140: } elsif ($remoteurl eq 'directory') {
1141: return OK;
1142: } else {
1143: my $author=$filename;
1144: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1145: my ($udom,$uname)=split(/\//,$author);
1146: my $home=homeserver($uname,$udom);
1147: unless ($home eq $perlvar{'lonHostID'}) {
1148: my @parts=split(/\//,$filename);
1149: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1150: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1151: &logthis("Malconfiguration for replication: $filename");
1152: return HTTP_BAD_REQUEST;
1153: }
1154: my $count;
1155: for ($count=5;$count<$#parts;$count++) {
1156: $path.="/$parts[$count]";
1157: if ((-e $path)!=1) {
1158: mkdir($path,0777);
1159: }
1160: }
1161: my $ua=new LWP::UserAgent;
1162: my $request=new HTTP::Request('GET',"$remoteurl");
1163: my $response=$ua->request($request,$transname);
1164: if ($response->is_error()) {
1165: unlink($transname);
1166: my $message=$response->status_line;
1167: &logthis("<font color=blue>WARNING:"
1168: ." LWP get: $message: $filename</font>");
1169: return HTTP_SERVICE_UNAVAILABLE;
1170: } else {
1171: if ($remoteurl!~/\.meta$/) {
1172: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1173: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1174: if ($mresponse->is_error()) {
1175: unlink($filename.'.meta');
1176: &logthis(
1177: "<font color=yellow>INFO: No metadata: $filename</font>");
1178: }
1179: }
1180: rename($transname,$filename);
1181: return OK;
1182: }
1183: }
1184: }
1185: }
1186:
1187: # ------------------------------------------------ Get server side include body
1188: sub ssi_body {
1189: my ($filelink,%form)=@_;
1190: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1191: &ssi($filelink,%form));
1192: $output=~
1193: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
1194: $output=~s/^.*?\<body[^\>]*\>//si;
1195: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1196: return $output;
1197: }
1198:
1199: # --------------------------------------------------------- Server Side Include
1200:
1201: sub ssi {
1202:
1203: my ($fn,%form)=@_;
1204:
1205: my $ua=new LWP::UserAgent;
1206:
1207: my $request;
1208:
1209: if (%form) {
1210: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1211: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1212: } else {
1213: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1214: }
1215:
1216: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1217: my $response=$ua->request($request);
1218:
1219: return $response->content;
1220: }
1221:
1222: sub externalssi {
1223: my ($url)=@_;
1224: my $ua=new LWP::UserAgent;
1225: my $request=new HTTP::Request('GET',$url);
1226: my $response=$ua->request($request);
1227: return $response->content;
1228: }
1229:
1230: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1231:
1232: sub allowuploaded {
1233: my ($srcurl,$url)=@_;
1234: $url=&clutter(&declutter($url));
1235: my $dir=$url;
1236: $dir=~s/\/[^\/]+$//;
1237: my %httpref=();
1238: my $httpurl=&hreflocation('',$url);
1239: $httpref{'httpref.'.$httpurl}=$srcurl;
1240: &Apache::lonnet::appenv(%httpref);
1241: }
1242:
1243: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1244: # input: action, courseID, current domain, home server for course, intended
1245: # path to file, source of file.
1246: # output: url to file (if action was uploaddoc),
1247: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1248: #
1249: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1250: # course.
1251: #
1252: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1253: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1254: # course's home server.
1255: #
1256: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1257: # be copied from $source (current location) to
1258: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1259: # and will then be copied to
1260: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1261: # course's home server.
1262: #
1263: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1264: # will be retrived from $ENV{form.uploaddoc} (from DOCS interface) to
1265: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1266: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1267: # in course's home server.
1268:
1269:
1270: sub process_coursefile {
1271: my ($action,$docuname,$docudom,$docuhome,$file,$source)=@_;
1272: my $fetchresult;
1273: if ($action eq 'propagate') {
1274: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file
1275: ,$docuhome);
1276: } else {
1277: my $fetchresult = '';
1278: my $fpath = '';
1279: my $fname = $file;
1280: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1281: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1282: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1283: unless ($fpath eq '') {
1284: my @parts=split('/',$fpath);
1285: foreach my $part (@parts) {
1286: $filepath.= '/'.$part;
1287: if ((-e $filepath)!=1) {
1288: mkdir($filepath,0777);
1289: }
1290: }
1291: }
1292: if ($action eq 'copy') {
1293: if ($source eq '') {
1294: $fetchresult = 'no source file';
1295: return $fetchresult;
1296: } else {
1297: my $destination = $filepath.'/'.$fname;
1298: rename($source,$destination);
1299: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1300: $docuhome);
1301: }
1302: } elsif ($action eq 'uploaddoc') {
1303: open(my $fh,'>'.$filepath.'/'.$fname);
1304: print $fh $ENV{'form.'.$source};
1305: close($fh);
1306: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1307: $docuhome);
1308: if ($fetchresult eq 'ok') {
1309: return '/uploaded/'.$fpath.'/'.$fname;
1310: } else {
1311: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1312: ' to host '.$docuhome.': '.$fetchresult);
1313: return '/adm/notfound.html';
1314: }
1315: }
1316: }
1317: unless ( $fetchresult eq 'ok') {
1318: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1319: ' to host '.$docuhome.': '.$fetchresult);
1320: }
1321: return $fetchresult;
1322: }
1323:
1324: # --------------- Take an uploaded file and put it into the userfiles directory
1325: # input: name of form element, coursedoc=1 means this is for the course
1326: # output: url of file in userspace
1327:
1328: sub clean_filename {
1329: my ($fname)=@_;
1330: # Replace Windows backslashes by forward slashes
1331: $fname=~s/\\/\//g;
1332: # Get rid of everything but the actual filename
1333: $fname=~s/^.*\/([^\/]+)$/$1/;
1334: # Replace spaces by underscores
1335: $fname=~s/\s+/\_/g;
1336: # Replace all other weird characters by nothing
1337: $fname=~s/[^\w\.\-]//g;
1338: # Replace all .\d. sequences with _\d. so they no longer look like version
1339: # numbers
1340: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1341: return $fname;
1342: }
1343:
1344: sub userfileupload {
1345: my ($formname,$coursedoc,$subdir)=@_;
1346: if (!defined($subdir)) { $subdir='unknown'; }
1347: my $fname=$ENV{'form.'.$formname.'.filename'};
1348: $fname=&clean_filename($fname);
1349: # See if there is anything left
1350: unless ($fname) { return 'error: no uploaded file'; }
1351: chop($ENV{'form.'.$formname});
1352: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1353: my $now = time;
1354: my $filepath = 'tmp/helprequests/'.$now;
1355: my @parts=split(/\//,$filepath);
1356: my $fullpath = $perlvar{'lonDaemons'};
1357: for (my $i=0;$i<@parts;$i++) {
1358: $fullpath .= '/'.$parts[$i];
1359: if ((-e $fullpath)!=1) {
1360: mkdir($fullpath,0777);
1361: }
1362: }
1363: open(my $fh,'>'.$fullpath.'/'.$fname);
1364: print $fh $ENV{'form.'.$formname};
1365: close($fh);
1366: return $fullpath.'/'.$fname;
1367: }
1368: # Create the directory if not present
1369: my $docuname='';
1370: my $docudom='';
1371: my $docuhome='';
1372: $fname="$subdir/$fname";
1373: if ($coursedoc) {
1374: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1375: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1376: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1377: if ($ENV{'form.folder'} =~ m/^default/) {
1378: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1379: } else {
1380: $fname=$ENV{'form.folder'}.'/'.$fname;
1381: return &process_coursefile('uploaddoc',$docuname,$docudom,$docuhome,$fname,$formname);
1382: }
1383: } else {
1384: $docuname=$ENV{'user.name'};
1385: $docudom=$ENV{'user.domain'};
1386: $docuhome=$ENV{'user.home'};
1387: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1388: }
1389: }
1390:
1391: sub finishuserfileupload {
1392: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1393: my $path=$docudom.'/'.$docuname.'/';
1394: my $filepath=$perlvar{'lonDocRoot'};
1395: my ($fnamepath,$file);
1396: $file=$fname;
1397: if ($fname=~m|/|) {
1398: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1399: $path.=$fnamepath.'/';
1400: }
1401: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1402: my $count;
1403: for ($count=4;$count<=$#parts;$count++) {
1404: $filepath.="/$parts[$count]";
1405: if ((-e $filepath)!=1) {
1406: mkdir($filepath,0777);
1407: }
1408: }
1409: # Save the file
1410: {
1411: #&Apache::lonnet::logthis("Saving to $filepath $file");
1412: open(my $fh,'>'.$filepath.'/'.$file);
1413: print $fh $ENV{'form.'.$formname};
1414: close($fh);
1415: }
1416: # Notify homeserver to grep it
1417: #
1418: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1419: if ($fetchresult eq 'ok') {
1420: #
1421: # Return the URL to it
1422: return '/uploaded/'.$path.$file;
1423: } else {
1424: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1425: ': '.$fetchresult);
1426: return '/adm/notfound.html';
1427: }
1428: }
1429:
1430: sub removeuploadedurl {
1431: my ($url)=@_;
1432: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1433: return &Apache::lonnet::removeuserfile($uname,$udom,$fname);
1434: }
1435:
1436: sub removeuserfile {
1437: my ($docuname,$docudom,$fname)=@_;
1438: my $home=&homeserver($docuname,$docudom);
1439: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1440: }
1441:
1442: sub mkdiruserfile {
1443: my ($docuname,$docudom,$dir)=@_;
1444: my $home=&homeserver($docuname,$docudom);
1445: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1446: }
1447:
1448: sub renameuserfile {
1449: my ($docuname,$docudom,$old,$new)=@_;
1450: my $home=&homeserver($docuname,$docudom);
1451: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1452: &escape("$new"),$home);
1453: }
1454:
1455: # ------------------------------------------------------------------------- Log
1456:
1457: sub log {
1458: my ($dom,$nam,$hom,$what)=@_;
1459: return critical("log:$dom:$nam:$what",$hom);
1460: }
1461:
1462: # ------------------------------------------------------------------ Course Log
1463: #
1464: # This routine flushes several buffers of non-mission-critical nature
1465: #
1466:
1467: sub flushcourselogs {
1468: &logthis('Flushing log buffers');
1469: #
1470: # course logs
1471: # This is a log of all transactions in a course, which can be used
1472: # for data mining purposes
1473: #
1474: # It also collects the courseid database, which lists last transaction
1475: # times and course titles for all courseids
1476: #
1477: my %courseidbuffer=();
1478: foreach (keys %courselogs) {
1479: my $crsid=$_;
1480: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1481: &escape($courselogs{$crsid}),
1482: $coursehombuf{$crsid}) eq 'ok') {
1483: delete $courselogs{$crsid};
1484: } else {
1485: &logthis('Failed to flush log buffer for '.$crsid);
1486: if (length($courselogs{$crsid})>40000) {
1487: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1488: " exceeded maximum size, deleting.</font>");
1489: delete $courselogs{$crsid};
1490: }
1491: }
1492: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1493: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1494: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1495: '='.&escape($courseinstcodebuf{$crsid});
1496: } else {
1497: $courseidbuffer{$coursehombuf{$crsid}}=
1498: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1499: '='.&escape($courseinstcodebuf{$crsid});
1500: }
1501: }
1502: #
1503: # Write course id database (reverse lookup) to homeserver of courses
1504: # Is used in pickcourse
1505: #
1506: foreach (keys %courseidbuffer) {
1507: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1508: }
1509: #
1510: # File accesses
1511: # Writes to the dynamic metadata of resources to get hit counts, etc.
1512: #
1513: foreach my $entry (keys(%accesshash)) {
1514: if ($entry =~ /___count$/) {
1515: my ($dom,$name);
1516: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1517: if (! defined($dom) || $dom eq '' ||
1518: ! defined($name) || $name eq '') {
1519: my $cid = $ENV{'request.course.id'};
1520: $dom = $ENV{'request.'.$cid.'.domain'};
1521: $name = $ENV{'request.'.$cid.'.num'};
1522: }
1523: my $value = $accesshash{$entry};
1524: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1525: my %temphash=($url => $value);
1526: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1527: if ($result eq 'ok') {
1528: delete $accesshash{$entry};
1529: } elsif ($result eq 'unknown_cmd') {
1530: # Target server has old code running on it.
1531: my %temphash=($entry => $value);
1532: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1533: delete $accesshash{$entry};
1534: }
1535: }
1536: } else {
1537: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1538: my %temphash=($entry => $accesshash{$entry});
1539: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1540: delete $accesshash{$entry};
1541: }
1542: }
1543: }
1544: #
1545: # Roles
1546: # Reverse lookup of user roles for course faculty/staff and co-authorship
1547: #
1548: foreach (keys %userrolehash) {
1549: my $entry=$_;
1550: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1551: split(/\:/,$entry);
1552: if (&Apache::lonnet::put('nohist_userroles',
1553: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1554: $rudom,$runame) eq 'ok') {
1555: delete $userrolehash{$entry};
1556: }
1557: }
1558: $dumpcount++;
1559: }
1560:
1561: sub courselog {
1562: my $what=shift;
1563: $what=time.':'.$what;
1564: unless ($ENV{'request.course.id'}) { return ''; }
1565: $coursedombuf{$ENV{'request.course.id'}}=
1566: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1567: $coursenumbuf{$ENV{'request.course.id'}}=
1568: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1569: $coursehombuf{$ENV{'request.course.id'}}=
1570: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1571: $coursedescrbuf{$ENV{'request.course.id'}}=
1572: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1573: $courseinstcodebuf{$ENV{'request.course.id'}}=
1574: $ENV{'course.'.$ENV{'request.course.id'}.'.internal.coursecode'};
1575: if (defined $courselogs{$ENV{'request.course.id'}}) {
1576: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1577: } else {
1578: $courselogs{$ENV{'request.course.id'}}.=$what;
1579: }
1580: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1581: &flushcourselogs();
1582: }
1583: }
1584:
1585: sub courseacclog {
1586: my $fnsymb=shift;
1587: unless ($ENV{'request.course.id'}) { return ''; }
1588: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1589: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1590: $what.=':POST';
1591: foreach (keys %ENV) {
1592: if ($_=~/^form\.(.*)/) {
1593: $what.=':'.$1.'='.$ENV{$_};
1594: }
1595: }
1596: }
1597: &courselog($what);
1598: }
1599:
1600: sub countacc {
1601: my $url=&declutter(shift);
1602: return if (! defined($url) || $url eq '');
1603: unless ($ENV{'request.course.id'}) { return ''; }
1604: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1605: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1606: $accesshash{$key}++;
1607: }
1608:
1609: sub linklog {
1610: my ($from,$to)=@_;
1611: $from=&declutter($from);
1612: $to=&declutter($to);
1613: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1614: $accesshash{$to.'___'.$from.'___goto'}=1;
1615: }
1616:
1617: sub userrolelog {
1618: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1619: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1620: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1621: ($trole=~/^cr/) || ($trole=~/^ta/)) {
1622: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1623: $userrolehash
1624: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1625: =$tend.':'.$tstart;
1626: }
1627: }
1628:
1629: sub get_course_adv_roles {
1630: my $cid=shift;
1631: $cid=$ENV{'request.course.id'} unless (defined($cid));
1632: my %coursehash=&coursedescription($cid);
1633: my %nothide=();
1634: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1635: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1636: }
1637: my %returnhash=();
1638: my %dumphash=
1639: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1640: my $now=time;
1641: foreach (keys %dumphash) {
1642: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1643: if (($tstart) && ($tstart<0)) { next; }
1644: if (($tend) && ($tend<$now)) { next; }
1645: if (($tstart) && ($now<$tstart)) { next; }
1646: my ($role,$username,$domain,$section)=split(/\:/,$_);
1647: if ((&privileged($username,$domain)) &&
1648: (!$nothide{$username.':'.$domain})) { next; }
1649: my $key=&plaintext($role);
1650: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1651: if ($returnhash{$key}) {
1652: $returnhash{$key}.=','.$username.':'.$domain;
1653: } else {
1654: $returnhash{$key}=$username.':'.$domain;
1655: }
1656: }
1657: return %returnhash;
1658: }
1659:
1660: sub get_my_roles {
1661: my ($uname,$udom)=@_;
1662: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1663: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1664: my %dumphash=
1665: &dump('nohist_userroles',$udom,$uname);
1666: my %returnhash=();
1667: my $now=time;
1668: foreach (keys %dumphash) {
1669: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1670: if (($tstart) && ($tstart<0)) { next; }
1671: if (($tend) && ($tend<$now)) { next; }
1672: if (($tstart) && ($now<$tstart)) { next; }
1673: my ($role,$username,$domain,$section)=split(/\:/,$_);
1674: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1675: }
1676: return %returnhash;
1677: }
1678:
1679: # ----------------------------------------------------- Frontpage Announcements
1680: #
1681: #
1682:
1683: sub postannounce {
1684: my ($server,$text)=@_;
1685: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1686: unless ($text=~/\w/) { $text=''; }
1687: return &reply('setannounce:'.&escape($text),$server);
1688: }
1689:
1690: sub getannounce {
1691:
1692: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1693: my $announcement='';
1694: while (<$fh>) { $announcement .=$_; }
1695: close($fh);
1696: if ($announcement=~/\w/) {
1697: return
1698: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1699: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1700: } else {
1701: return '';
1702: }
1703: } else {
1704: return '';
1705: }
1706: }
1707:
1708: # ---------------------------------------------------------- Course ID routines
1709: # Deal with domain's nohist_courseid.db files
1710: #
1711:
1712: sub courseidput {
1713: my ($domain,$what,$coursehome)=@_;
1714: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1715: }
1716:
1717: sub courseiddump {
1718: my ($domfilter,$descfilter,$sincefilter,$hostidflag,$hostidref)=@_;
1719: my %returnhash=();
1720: unless ($domfilter) { $domfilter=''; }
1721: foreach my $tryserver (keys %libserv) {
1722: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1723: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1724: foreach (
1725: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1726: $sincefilter.':'.&escape($descfilter),
1727: $tryserver))) {
1728: my ($key,$value)=split(/\=/,$_);
1729: if (($key) && ($value)) {
1730: $returnhash{&unescape($key)}=$value;
1731: }
1732: }
1733: }
1734: }
1735: }
1736: return %returnhash;
1737: }
1738:
1739: #
1740: # ----------------------------------------------------------- Check out an item
1741:
1742: sub get_first_access {
1743: my ($type,$argsymb)=@_;
1744: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1745: if ($argsymb) { $symb=$argsymb; }
1746: my ($map,$id,$res)=&decode_symb($symb);
1747: if ($type eq 'map') { $res=$map; }
1748: my %times=&get('firstaccesstimes',[$res],$udom,$uname);
1749: return $times{$res};
1750: }
1751:
1752: sub set_first_access {
1753: my ($type)=@_;
1754: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1755: my ($map,$id,$res)=&decode_symb($symb);
1756: if ($type eq 'map') { $res=$map; }
1757: my $firstaccess=&get_first_access($type);
1758: if (!$firstaccess) {
1759: return &put('firstaccesstimes',{$res=>time},$udom,$uname);
1760: }
1761: return 'already_set';
1762: }
1763:
1764: sub checkout {
1765: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1766: my $now=time;
1767: my $lonhost=$perlvar{'lonHostID'};
1768: my $infostr=&escape(
1769: 'CHECKOUTTOKEN&'.
1770: $tuname.'&'.
1771: $tudom.'&'.
1772: $tcrsid.'&'.
1773: $symb.'&'.
1774: $now.'&'.$ENV{'REMOTE_ADDR'});
1775: my $token=&reply('tmpput:'.$infostr,$lonhost);
1776: if ($token=~/^error\:/) {
1777: &logthis("<font color=blue>WARNING: ".
1778: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1779: "</font>");
1780: return '';
1781: }
1782:
1783: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1784: $token=~tr/a-z/A-Z/;
1785:
1786: my %infohash=('resource.0.outtoken' => $token,
1787: 'resource.0.checkouttime' => $now,
1788: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1789:
1790: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1791: return '';
1792: } else {
1793: &logthis("<font color=blue>WARNING: ".
1794: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1795: "</font>");
1796: }
1797:
1798: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1799: &escape('Checkout '.$infostr.' - '.
1800: $token)) ne 'ok') {
1801: return '';
1802: } else {
1803: &logthis("<font color=blue>WARNING: ".
1804: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1805: "</font>");
1806: }
1807: return $token;
1808: }
1809:
1810: # ------------------------------------------------------------ Check in an item
1811:
1812: sub checkin {
1813: my $token=shift;
1814: my $now=time;
1815: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1816: $lonhost=~tr/A-Z/a-z/;
1817: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1818: $dtoken=~s/\W/\_/g;
1819: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1820: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1821:
1822: unless (($tuname) && ($tudom)) {
1823: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1824: return '';
1825: }
1826:
1827: unless (&allowed('mgr',$tcrsid)) {
1828: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1829: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1830: return '';
1831: }
1832:
1833: my %infohash=('resource.0.intoken' => $token,
1834: 'resource.0.checkintime' => $now,
1835: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1836:
1837: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1838: return '';
1839: }
1840:
1841: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1842: &escape('Checkin - '.$token)) ne 'ok') {
1843: return '';
1844: }
1845:
1846: return ($symb,$tuname,$tudom,$tcrsid);
1847: }
1848:
1849: # --------------------------------------------- Set Expire Date for Spreadsheet
1850:
1851: sub expirespread {
1852: my ($uname,$udom,$stype,$usymb)=@_;
1853: my $cid=$ENV{'request.course.id'};
1854: if ($cid) {
1855: my $now=time;
1856: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1857: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1858: $ENV{'course.'.$cid.'.num'}.
1859: ':nohist_expirationdates:'.
1860: &escape($key).'='.$now,
1861: $ENV{'course.'.$cid.'.home'})
1862: }
1863: return 'ok';
1864: }
1865:
1866: # ----------------------------------------------------- Devalidate Spreadsheets
1867:
1868: sub devalidate {
1869: my ($symb,$uname,$udom)=@_;
1870: my $cid=$ENV{'request.course.id'};
1871: if ($cid) {
1872: # delete the stored spreadsheets for
1873: # - the student level sheet of this user in course's homespace
1874: # - the assessment level sheet for this resource
1875: # for this user in user's homespace
1876: my $key=$uname.':'.$udom.':';
1877: my $status=
1878: &del('nohist_calculatedsheets',
1879: [$key.'studentcalc:'],
1880: $ENV{'course.'.$cid.'.domain'},
1881: $ENV{'course.'.$cid.'.num'})
1882: .' '.
1883: &del('nohist_calculatedsheets_'.$cid,
1884: [$key.'assesscalc:'.$symb],$udom,$uname);
1885: unless ($status eq 'ok ok') {
1886: &logthis('Could not devalidate spreadsheet '.
1887: $uname.' at '.$udom.' for '.
1888: $symb.': '.$status);
1889: }
1890: }
1891: }
1892:
1893: sub get_scalar {
1894: my ($string,$end) = @_;
1895: my $value;
1896: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1897: $value = $1;
1898: } elsif ($$string =~ s/^([^&]*?)&//) {
1899: $value = $1;
1900: }
1901: return &unescape($value);
1902: }
1903:
1904: sub array2str {
1905: my (@array) = @_;
1906: my $result=&arrayref2str(\@array);
1907: $result=~s/^__ARRAY_REF__//;
1908: $result=~s/__END_ARRAY_REF__$//;
1909: return $result;
1910: }
1911:
1912: sub arrayref2str {
1913: my ($arrayref) = @_;
1914: my $result='__ARRAY_REF__';
1915: foreach my $elem (@$arrayref) {
1916: if(ref($elem) eq 'ARRAY') {
1917: $result.=&arrayref2str($elem).'&';
1918: } elsif(ref($elem) eq 'HASH') {
1919: $result.=&hashref2str($elem).'&';
1920: } elsif(ref($elem)) {
1921: #print("Got a ref of ".(ref($elem))." skipping.");
1922: } else {
1923: $result.=&escape($elem).'&';
1924: }
1925: }
1926: $result=~s/\&$//;
1927: $result .= '__END_ARRAY_REF__';
1928: return $result;
1929: }
1930:
1931: sub hash2str {
1932: my (%hash) = @_;
1933: my $result=&hashref2str(\%hash);
1934: $result=~s/^__HASH_REF__//;
1935: $result=~s/__END_HASH_REF__$//;
1936: return $result;
1937: }
1938:
1939: sub hashref2str {
1940: my ($hashref)=@_;
1941: my $result='__HASH_REF__';
1942: foreach (sort(keys(%$hashref))) {
1943: if (ref($_) eq 'ARRAY') {
1944: $result.=&arrayref2str($_).'=';
1945: } elsif (ref($_) eq 'HASH') {
1946: $result.=&hashref2str($_).'=';
1947: } elsif (ref($_)) {
1948: $result.='=';
1949: #print("Got a ref of ".(ref($_))." skipping.");
1950: } else {
1951: if ($_) {$result.=&escape($_).'=';} else { last; }
1952: }
1953:
1954: if(ref($hashref->{$_}) eq 'ARRAY') {
1955: $result.=&arrayref2str($hashref->{$_}).'&';
1956: } elsif(ref($hashref->{$_}) eq 'HASH') {
1957: $result.=&hashref2str($hashref->{$_}).'&';
1958: } elsif(ref($hashref->{$_})) {
1959: $result.='&';
1960: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1961: } else {
1962: $result.=&escape($hashref->{$_}).'&';
1963: }
1964: }
1965: $result=~s/\&$//;
1966: $result .= '__END_HASH_REF__';
1967: return $result;
1968: }
1969:
1970: sub str2hash {
1971: my ($string)=@_;
1972: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1973: return %$hash;
1974: }
1975:
1976: sub str2hashref {
1977: my ($string) = @_;
1978:
1979: my %hash;
1980:
1981: if($string !~ /^__HASH_REF__/) {
1982: if (! ($string eq '' || !defined($string))) {
1983: $hash{'error'}='Not hash reference';
1984: }
1985: return (\%hash, $string);
1986: }
1987:
1988: $string =~ s/^__HASH_REF__//;
1989:
1990: while($string !~ /^__END_HASH_REF__/) {
1991: #key
1992: my $key='';
1993: if($string =~ /^__HASH_REF__/) {
1994: ($key, $string)=&str2hashref($string);
1995: if(defined($key->{'error'})) {
1996: $hash{'error'}='Bad data';
1997: return (\%hash, $string);
1998: }
1999: } elsif($string =~ /^__ARRAY_REF__/) {
2000: ($key, $string)=&str2arrayref($string);
2001: if($key->[0] eq 'Array reference error') {
2002: $hash{'error'}='Bad data';
2003: return (\%hash, $string);
2004: }
2005: } else {
2006: $string =~ s/^(.*?)=//;
2007: $key=&unescape($1);
2008: }
2009: $string =~ s/^=//;
2010:
2011: #value
2012: my $value='';
2013: if($string =~ /^__HASH_REF__/) {
2014: ($value, $string)=&str2hashref($string);
2015: if(defined($value->{'error'})) {
2016: $hash{'error'}='Bad data';
2017: return (\%hash, $string);
2018: }
2019: } elsif($string =~ /^__ARRAY_REF__/) {
2020: ($value, $string)=&str2arrayref($string);
2021: if($value->[0] eq 'Array reference error') {
2022: $hash{'error'}='Bad data';
2023: return (\%hash, $string);
2024: }
2025: } else {
2026: $value=&get_scalar(\$string,'__END_HASH_REF__');
2027: }
2028: $string =~ s/^&//;
2029:
2030: $hash{$key}=$value;
2031: }
2032:
2033: $string =~ s/^__END_HASH_REF__//;
2034:
2035: return (\%hash, $string);
2036: }
2037:
2038: sub str2array {
2039: my ($string)=@_;
2040: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2041: return @$array;
2042: }
2043:
2044: sub str2arrayref {
2045: my ($string) = @_;
2046: my @array;
2047:
2048: if($string !~ /^__ARRAY_REF__/) {
2049: if (! ($string eq '' || !defined($string))) {
2050: $array[0]='Array reference error';
2051: }
2052: return (\@array, $string);
2053: }
2054:
2055: $string =~ s/^__ARRAY_REF__//;
2056:
2057: while($string !~ /^__END_ARRAY_REF__/) {
2058: my $value='';
2059: if($string =~ /^__HASH_REF__/) {
2060: ($value, $string)=&str2hashref($string);
2061: if(defined($value->{'error'})) {
2062: $array[0] ='Array reference error';
2063: return (\@array, $string);
2064: }
2065: } elsif($string =~ /^__ARRAY_REF__/) {
2066: ($value, $string)=&str2arrayref($string);
2067: if($value->[0] eq 'Array reference error') {
2068: $array[0] ='Array reference error';
2069: return (\@array, $string);
2070: }
2071: } else {
2072: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2073: }
2074: $string =~ s/^&//;
2075:
2076: push(@array, $value);
2077: }
2078:
2079: $string =~ s/^__END_ARRAY_REF__//;
2080:
2081: return (\@array, $string);
2082: }
2083:
2084: # -------------------------------------------------------------------Temp Store
2085:
2086: sub tmpreset {
2087: my ($symb,$namespace,$domain,$stuname) = @_;
2088: if (!$symb) {
2089: $symb=&symbread();
2090: if (!$symb) { $symb= $ENV{'request.url'}; }
2091: }
2092: $symb=escape($symb);
2093:
2094: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2095: $namespace=~s/\//\_/g;
2096: $namespace=~s/\W//g;
2097:
2098: #FIXME needs to do something for /pub resources
2099: if (!$domain) { $domain=$ENV{'user.domain'}; }
2100: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2101: my $path=$perlvar{'lonDaemons'}.'/tmp';
2102: my %hash;
2103: if (tie(%hash,'GDBM_File',
2104: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2105: &GDBM_WRCREAT(),0640)) {
2106: foreach my $key (keys %hash) {
2107: if ($key=~ /:$symb/) {
2108: delete($hash{$key});
2109: }
2110: }
2111: }
2112: }
2113:
2114: sub tmpstore {
2115: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2116:
2117: if (!$symb) {
2118: $symb=&symbread();
2119: if (!$symb) { $symb= $ENV{'request.url'}; }
2120: }
2121: $symb=escape($symb);
2122:
2123: if (!$namespace) {
2124: # I don't think we would ever want to store this for a course.
2125: # it seems this will only be used if we don't have a course.
2126: #$namespace=$ENV{'request.course.id'};
2127: #if (!$namespace) {
2128: $namespace=$ENV{'request.state'};
2129: #}
2130: }
2131: $namespace=~s/\//\_/g;
2132: $namespace=~s/\W//g;
2133: #FIXME needs to do something for /pub resources
2134: if (!$domain) { $domain=$ENV{'user.domain'}; }
2135: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2136: my $now=time;
2137: my %hash;
2138: my $path=$perlvar{'lonDaemons'}.'/tmp';
2139: if (tie(%hash,'GDBM_File',
2140: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2141: &GDBM_WRCREAT(),0640)) {
2142: $hash{"version:$symb"}++;
2143: my $version=$hash{"version:$symb"};
2144: my $allkeys='';
2145: foreach my $key (keys(%$storehash)) {
2146: $allkeys.=$key.':';
2147: $hash{"$version:$symb:$key"}=$$storehash{$key};
2148: }
2149: $hash{"$version:$symb:timestamp"}=$now;
2150: $allkeys.='timestamp';
2151: $hash{"$version:keys:$symb"}=$allkeys;
2152: if (untie(%hash)) {
2153: return 'ok';
2154: } else {
2155: return "error:$!";
2156: }
2157: } else {
2158: return "error:$!";
2159: }
2160: }
2161:
2162: # -----------------------------------------------------------------Temp Restore
2163:
2164: sub tmprestore {
2165: my ($symb,$namespace,$domain,$stuname) = @_;
2166:
2167: if (!$symb) {
2168: $symb=&symbread();
2169: if (!$symb) { $symb= $ENV{'request.url'}; }
2170: }
2171: $symb=escape($symb);
2172:
2173: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2174: #FIXME needs to do something for /pub resources
2175: if (!$domain) { $domain=$ENV{'user.domain'}; }
2176: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2177:
2178: my %returnhash;
2179: $namespace=~s/\//\_/g;
2180: $namespace=~s/\W//g;
2181: my %hash;
2182: my $path=$perlvar{'lonDaemons'}.'/tmp';
2183: if (tie(%hash,'GDBM_File',
2184: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2185: &GDBM_READER(),0640)) {
2186: my $version=$hash{"version:$symb"};
2187: $returnhash{'version'}=$version;
2188: my $scope;
2189: for ($scope=1;$scope<=$version;$scope++) {
2190: my $vkeys=$hash{"$scope:keys:$symb"};
2191: my @keys=split(/:/,$vkeys);
2192: my $key;
2193: $returnhash{"$scope:keys"}=$vkeys;
2194: foreach $key (@keys) {
2195: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
2196: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
2197: }
2198: }
2199: if (!(untie(%hash))) {
2200: return "error:$!";
2201: }
2202: } else {
2203: return "error:$!";
2204: }
2205: return %returnhash;
2206: }
2207:
2208: # ----------------------------------------------------------------------- Store
2209:
2210: sub store {
2211: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2212: my $home='';
2213:
2214: if ($stuname) { $home=&homeserver($stuname,$domain); }
2215:
2216: $symb=&symbclean($symb);
2217: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2218:
2219: if (!$domain) { $domain=$ENV{'user.domain'}; }
2220: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2221:
2222: &devalidate($symb,$stuname,$domain);
2223:
2224: $symb=escape($symb);
2225: if (!$namespace) {
2226: unless ($namespace=$ENV{'request.course.id'}) {
2227: return '';
2228: }
2229: }
2230: if (!$home) { $home=$ENV{'user.home'}; }
2231:
2232: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2233: $$storehash{'host'}=$perlvar{'lonHostID'};
2234:
2235: my $namevalue='';
2236: foreach (keys %$storehash) {
2237: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2238: }
2239: $namevalue=~s/\&$//;
2240: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2241: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2242: }
2243:
2244: # -------------------------------------------------------------- Critical Store
2245:
2246: sub cstore {
2247: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2248: my $home='';
2249:
2250: if ($stuname) { $home=&homeserver($stuname,$domain); }
2251:
2252: $symb=&symbclean($symb);
2253: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2254:
2255: if (!$domain) { $domain=$ENV{'user.domain'}; }
2256: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2257:
2258: &devalidate($symb,$stuname,$domain);
2259:
2260: $symb=escape($symb);
2261: if (!$namespace) {
2262: unless ($namespace=$ENV{'request.course.id'}) {
2263: return '';
2264: }
2265: }
2266: if (!$home) { $home=$ENV{'user.home'}; }
2267:
2268: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2269: $$storehash{'host'}=$perlvar{'lonHostID'};
2270:
2271: my $namevalue='';
2272: foreach (keys %$storehash) {
2273: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2274: }
2275: $namevalue=~s/\&$//;
2276: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2277: return critical
2278: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2279: }
2280:
2281: # --------------------------------------------------------------------- Restore
2282:
2283: sub restore {
2284: my ($symb,$namespace,$domain,$stuname) = @_;
2285: my $home='';
2286:
2287: if ($stuname) { $home=&homeserver($stuname,$domain); }
2288:
2289: if (!$symb) {
2290: unless ($symb=escape(&symbread())) { return ''; }
2291: } else {
2292: $symb=&escape(&symbclean($symb));
2293: }
2294: if (!$namespace) {
2295: unless ($namespace=$ENV{'request.course.id'}) {
2296: return '';
2297: }
2298: }
2299: if (!$domain) { $domain=$ENV{'user.domain'}; }
2300: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2301: if (!$home) { $home=$ENV{'user.home'}; }
2302: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2303:
2304: my %returnhash=();
2305: foreach (split(/\&/,$answer)) {
2306: my ($name,$value)=split(/\=/,$_);
2307: $returnhash{&unescape($name)}=&unescape($value);
2308: }
2309: my $version;
2310: for ($version=1;$version<=$returnhash{'version'};$version++) {
2311: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2312: $returnhash{$_}=$returnhash{$version.':'.$_};
2313: }
2314: }
2315: return %returnhash;
2316: }
2317:
2318: # ---------------------------------------------------------- Course Description
2319:
2320: sub coursedescription {
2321: my $courseid=shift;
2322: $courseid=~s/^\///;
2323: $courseid=~s/\_/\//g;
2324: my ($cdomain,$cnum)=split(/\//,$courseid);
2325: my $chome=&homeserver($cnum,$cdomain);
2326: my $normalid=$cdomain.'_'.$cnum;
2327: # need to always cache even if we get errors otherwise we keep
2328: # trying and trying and trying to get the course description.
2329: my %envhash=();
2330: my %returnhash=();
2331: $envhash{'course.'.$normalid.'.last_cache'}=time;
2332: if ($chome ne 'no_host') {
2333: %returnhash=&dump('environment',$cdomain,$cnum);
2334: if (!exists($returnhash{'con_lost'})) {
2335: $returnhash{'home'}= $chome;
2336: $returnhash{'domain'} = $cdomain;
2337: $returnhash{'num'} = $cnum;
2338: while (my ($name,$value) = each %returnhash) {
2339: $envhash{'course.'.$normalid.'.'.$name}=$value;
2340: }
2341: $returnhash{'url'}=&clutter($returnhash{'url'});
2342: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2343: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
2344: $envhash{'course.'.$normalid.'.home'}=$chome;
2345: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2346: $envhash{'course.'.$normalid.'.num'}=$cnum;
2347: }
2348: }
2349: &appenv(%envhash);
2350: return %returnhash;
2351: }
2352:
2353: # -------------------------------------------------See if a user is privileged
2354:
2355: sub privileged {
2356: my ($username,$domain)=@_;
2357: my $rolesdump=&reply("dump:$domain:$username:roles",
2358: &homeserver($username,$domain));
2359: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2360: my $now=time;
2361: if ($rolesdump ne '') {
2362: foreach (split(/&/,$rolesdump)) {
2363: if ($_!~/^rolesdef\&/) {
2364: my ($area,$role)=split(/=/,$_);
2365: $area=~s/\_\w\w$//;
2366: my ($trole,$tend,$tstart)=split(/_/,$role);
2367: if (($trole eq 'dc') || ($trole eq 'su')) {
2368: my $active=1;
2369: if ($tend) {
2370: if ($tend<$now) { $active=0; }
2371: }
2372: if ($tstart) {
2373: if ($tstart>$now) { $active=0; }
2374: }
2375: if ($active) { return 1; }
2376: }
2377: }
2378: }
2379: }
2380: return 0;
2381: }
2382:
2383: # -------------------------------------------------------- Get user privileges
2384:
2385: sub rolesinit {
2386: my ($domain,$username,$authhost)=@_;
2387: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2388: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2389: my %allroles=();
2390: my %thesepriv=();
2391: my $now=time;
2392: my $userroles="user.login.time=$now\n";
2393: my $thesestr;
2394:
2395: if ($rolesdump ne '') {
2396: foreach (split(/&/,$rolesdump)) {
2397: if ($_!~/^rolesdef\&/) {
2398: my ($area,$role)=split(/=/,$_);
2399: $area=~s/\_\w\w$//;
2400: my ($trole,$tend,$tstart)=split(/_/,$role);
2401: $userroles.='user.role.'.$trole.'.'.$area.'='.
2402: $tstart.'.'.$tend."\n";
2403: # log the associated role with the area
2404: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2405: if ($tend!=0) {
2406: if ($tend<$now) {
2407: $trole='';
2408: }
2409: }
2410: if ($tstart!=0) {
2411: if ($tstart>$now) {
2412: $trole='';
2413: }
2414: }
2415: if (($area ne '') && ($trole ne '')) {
2416: my $spec=$trole.'.'.$area;
2417: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2418: if ($trole =~ /^cr\//) {
2419: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2420: my $homsvr=homeserver($rauthor,$rdomain);
2421: if ($hostname{$homsvr} ne '') {
2422: my ($rdummy,$roledef)=
2423: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2424:
2425: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2426: my ($syspriv,$dompriv,$coursepriv)=
2427: split(/\_/,$roledef);
2428: if (defined($syspriv)) {
2429: $allroles{'cm./'}.=':'.$syspriv;
2430: $allroles{$spec.'./'}.=':'.$syspriv;
2431: }
2432: if ($tdomain ne '') {
2433: if (defined($dompriv)) {
2434: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2435: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2436: }
2437: if ($trest ne '') {
2438: if (defined($coursepriv)) {
2439: $allroles{'cm.'.$area}.=':'.$coursepriv;
2440: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
2441: }
2442: }
2443: }
2444: }
2445: }
2446: } else {
2447: if (defined($pr{$trole.':s'})) {
2448: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
2449: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2450: }
2451: if ($tdomain ne '') {
2452: if (defined($pr{$trole.':d'})) {
2453: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2454: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2455: }
2456: if ($trest ne '') {
2457: if (defined($pr{$trole.':c'})) {
2458: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2459: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2460: }
2461: }
2462: }
2463: }
2464: }
2465: }
2466: }
2467: my $adv=0;
2468: my $author=0;
2469: foreach (keys %allroles) {
2470: %thesepriv=();
2471: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
2472: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2473: foreach (split(/:/,$allroles{$_})) {
2474: if ($_ ne '') {
2475: my ($privilege,$restrictions)=split(/&/,$_);
2476: if ($restrictions eq '') {
2477: $thesepriv{$privilege}='F';
2478: } else {
2479: if ($thesepriv{$privilege} ne 'F') {
2480: $thesepriv{$privilege}.=$restrictions;
2481: }
2482: }
2483: }
2484: }
2485: $thesestr='';
2486: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2487: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
2488: }
2489: $userroles.='user.adv='.$adv."\n".
2490: 'user.author='.$author."\n";
2491: $ENV{'user.adv'}=$adv;
2492: }
2493: return $userroles;
2494: }
2495:
2496: # --------------------------------------------------------------- get interface
2497:
2498: sub get {
2499: my ($namespace,$storearr,$udomain,$uname)=@_;
2500: my $items='';
2501: foreach (@$storearr) {
2502: $items.=escape($_).'&';
2503: }
2504: $items=~s/\&$//;
2505: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2506: if (!$uname) { $uname=$ENV{'user.name'}; }
2507: my $uhome=&homeserver($uname,$udomain);
2508:
2509: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2510: my @pairs=split(/\&/,$rep);
2511: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2512: return @pairs;
2513: }
2514: my %returnhash=();
2515: my $i=0;
2516: foreach (@$storearr) {
2517: $returnhash{$_}=unescape($pairs[$i]);
2518: $i++;
2519: }
2520: return %returnhash;
2521: }
2522:
2523: # --------------------------------------------------------------- del interface
2524:
2525: sub del {
2526: my ($namespace,$storearr,$udomain,$uname)=@_;
2527: my $items='';
2528: foreach (@$storearr) {
2529: $items.=escape($_).'&';
2530: }
2531: $items=~s/\&$//;
2532: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2533: if (!$uname) { $uname=$ENV{'user.name'}; }
2534: my $uhome=&homeserver($uname,$udomain);
2535:
2536: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2537: }
2538:
2539: # -------------------------------------------------------------- dump interface
2540:
2541: sub dump {
2542: my ($namespace,$udomain,$uname,$regexp)=@_;
2543: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2544: if (!$uname) { $uname=$ENV{'user.name'}; }
2545: my $uhome=&homeserver($uname,$udomain);
2546: if ($regexp) {
2547: $regexp=&escape($regexp);
2548: } else {
2549: $regexp='.';
2550: }
2551: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2552: my @pairs=split(/\&/,$rep);
2553: my %returnhash=();
2554: foreach (@pairs) {
2555: my ($key,$value)=split(/=/,$_);
2556: $returnhash{unescape($key)}=unescape($value);
2557: }
2558: return %returnhash;
2559: }
2560:
2561: # -------------------------------------------------------------- keys interface
2562:
2563: sub getkeys {
2564: my ($namespace,$udomain,$uname)=@_;
2565: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2566: if (!$uname) { $uname=$ENV{'user.name'}; }
2567: my $uhome=&homeserver($uname,$udomain);
2568: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2569: my @keyarray=();
2570: foreach (split(/\&/,$rep)) {
2571: push (@keyarray,&unescape($_));
2572: }
2573: return @keyarray;
2574: }
2575:
2576: # --------------------------------------------------------------- currentdump
2577: sub currentdump {
2578: my ($courseid,$sdom,$sname)=@_;
2579: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2580: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2581: $sname = $ENV{'user.name'} if (! defined($sname));
2582: my $uhome = &homeserver($sname,$sdom);
2583: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2584: return if ($rep =~ /^(error:|no_such_host)/);
2585: #
2586: my %returnhash=();
2587: #
2588: if ($rep eq "unknown_cmd") {
2589: # an old lond will not know currentdump
2590: # Do a dump and make it look like a currentdump
2591: my @tmp = &dump($courseid,$sdom,$sname,'.');
2592: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2593: my %hash = @tmp;
2594: @tmp=();
2595: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2596: } else {
2597: my @pairs=split(/\&/,$rep);
2598: foreach (@pairs) {
2599: my ($key,$value)=split(/=/,$_);
2600: my ($symb,$param) = split(/:/,$key);
2601: $returnhash{&unescape($symb)}->{&unescape($param)} =
2602: &unescape($value);
2603: }
2604: }
2605: return %returnhash;
2606: }
2607:
2608: sub convert_dump_to_currentdump{
2609: my %hash = %{shift()};
2610: my %returnhash;
2611: # Code ripped from lond, essentially. The only difference
2612: # here is the unescaping done by lonnet::dump(). Conceivably
2613: # we might run in to problems with parameter names =~ /^v\./
2614: while (my ($key,$value) = each(%hash)) {
2615: my ($v,$symb,$param) = split(/:/,$key);
2616: next if ($v eq 'version' || $symb eq 'keys');
2617: next if (exists($returnhash{$symb}) &&
2618: exists($returnhash{$symb}->{$param}) &&
2619: $returnhash{$symb}->{'v.'.$param} > $v);
2620: $returnhash{$symb}->{$param}=$value;
2621: $returnhash{$symb}->{'v.'.$param}=$v;
2622: }
2623: #
2624: # Remove all of the keys in the hashes which keep track of
2625: # the version of the parameter.
2626: while (my ($symb,$param_hash) = each(%returnhash)) {
2627: # use a foreach because we are going to delete from the hash.
2628: foreach my $key (keys(%$param_hash)) {
2629: delete($param_hash->{$key}) if ($key =~ /^v\./);
2630: }
2631: }
2632: return \%returnhash;
2633: }
2634:
2635: # --------------------------------------------------------------- inc interface
2636:
2637: sub inc {
2638: my ($namespace,$store,$udomain,$uname) = @_;
2639: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2640: if (!$uname) { $uname=$ENV{'user.name'}; }
2641: my $uhome=&homeserver($uname,$udomain);
2642: my $items='';
2643: if (! ref($store)) {
2644: # got a single value, so use that instead
2645: $items = &escape($store).'=&';
2646: } elsif (ref($store) eq 'SCALAR') {
2647: $items = &escape($$store).'=&';
2648: } elsif (ref($store) eq 'ARRAY') {
2649: $items = join('=&',map {&escape($_);} @{$store});
2650: } elsif (ref($store) eq 'HASH') {
2651: while (my($key,$value) = each(%{$store})) {
2652: $items.= &escape($key).'='.&escape($value).'&';
2653: }
2654: }
2655: $items=~s/\&$//;
2656: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2657: }
2658:
2659: # --------------------------------------------------------------- put interface
2660:
2661: sub put {
2662: my ($namespace,$storehash,$udomain,$uname)=@_;
2663: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2664: if (!$uname) { $uname=$ENV{'user.name'}; }
2665: my $uhome=&homeserver($uname,$udomain);
2666: my $items='';
2667: foreach (keys %$storehash) {
2668: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
2669: }
2670: $items=~s/\&$//;
2671: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2672: }
2673:
2674: # ---------------------------------------------------------- putstore interface
2675:
2676: sub putstore {
2677: my ($namespace,$storehash,$udomain,$uname)=@_;
2678: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2679: if (!$uname) { $uname=$ENV{'user.name'}; }
2680: my $uhome=&homeserver($uname,$udomain);
2681: my $items='';
2682: my %allitems = ();
2683: foreach (keys %$storehash) {
2684: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
2685: my $key = $1.':keys:'.$2;
2686: $allitems{$key} .= $3.':';
2687: }
2688: $items.=$_.'='.&escape($$storehash{$_}).'&';
2689: }
2690: foreach (keys %allitems) {
2691: $allitems{$_} =~ s/\:$//;
2692: $items.= $_.'='.$allitems{$_}.'&';
2693: }
2694: $items=~s/\&$//;
2695: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2696: }
2697:
2698: # ------------------------------------------------------ critical put interface
2699:
2700: sub cput {
2701: my ($namespace,$storehash,$udomain,$uname)=@_;
2702: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2703: if (!$uname) { $uname=$ENV{'user.name'}; }
2704: my $uhome=&homeserver($uname,$udomain);
2705: my $items='';
2706: foreach (keys %$storehash) {
2707: $items.=escape($_).'='.escape($$storehash{$_}).'&';
2708: }
2709: $items=~s/\&$//;
2710: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2711: }
2712:
2713: # -------------------------------------------------------------- eget interface
2714:
2715: sub eget {
2716: my ($namespace,$storearr,$udomain,$uname)=@_;
2717: my $items='';
2718: foreach (@$storearr) {
2719: $items.=escape($_).'&';
2720: }
2721: $items=~s/\&$//;
2722: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2723: if (!$uname) { $uname=$ENV{'user.name'}; }
2724: my $uhome=&homeserver($uname,$udomain);
2725: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2726: my @pairs=split(/\&/,$rep);
2727: my %returnhash=();
2728: my $i=0;
2729: foreach (@$storearr) {
2730: $returnhash{$_}=unescape($pairs[$i]);
2731: $i++;
2732: }
2733: return %returnhash;
2734: }
2735:
2736: # ---------------------------------------------- Custom access rule evaluation
2737:
2738: sub customaccess {
2739: my ($priv,$uri)=@_;
2740: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2741: $urealm=~s/^\W//;
2742: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2743: my $access=0;
2744: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2745: my ($effect,$realm,$role)=split(/\:/,$_);
2746: if ($role) {
2747: if ($role ne $urole) { next; }
2748: }
2749: foreach (split(/\s*\,\s*/,$realm)) {
2750: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2751: if ($tdom) {
2752: if ($tdom ne $udom) { next; }
2753: }
2754: if ($tcrs) {
2755: if ($tcrs ne $ucrs) { next; }
2756: }
2757: if ($tsec) {
2758: if ($tsec ne $usec) { next; }
2759: }
2760: $access=($effect eq 'allow');
2761: last;
2762: }
2763: if ($realm eq '' && $role eq '') {
2764: $access=($effect eq 'allow');
2765: }
2766: }
2767: return $access;
2768: }
2769:
2770: # ------------------------------------------------- Check for a user privilege
2771:
2772: sub allowed {
2773: my ($priv,$uri)=@_;
2774: $uri=&deversion($uri);
2775: my $orguri=$uri;
2776: $uri=&declutter($uri);
2777:
2778:
2779:
2780: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
2781: # Free bre access to adm and meta resources
2782: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
2783: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2784: return 'F';
2785: }
2786:
2787: # Free bre access to user's own portfolio contents
2788: my ($space,$domain,$name,$dir)=split('/',$uri);
2789: if (('uploaded' eq $space) && ($ENV{'user.name'} eq $name) &&
2790: ($ENV{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
2791: return 'F';
2792: }
2793:
2794: # Free bre to public access
2795:
2796: if ($priv eq 'bre') {
2797: my $copyright=&metadata($uri,'copyright');
2798: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2799: return 'F';
2800: }
2801: if ($copyright eq 'priv') {
2802: $uri=~/([^\/]+)\/([^\/]+)\//;
2803: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2804: return '';
2805: }
2806: }
2807: if ($copyright eq 'domain') {
2808: $uri=~/([^\/]+)\/([^\/]+)\//;
2809: unless (($ENV{'user.domain'} eq $1) ||
2810: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2811: return '';
2812: }
2813: }
2814: if ($ENV{'request.role'}=~ /li\.\//) {
2815: # Library role, so allow browsing of resources in this domain.
2816: return 'F';
2817: }
2818: if ($copyright eq 'custom') {
2819: unless (&customaccess($priv,$uri)) { return ''; }
2820: }
2821: }
2822: # Domain coordinator is trying to create a course
2823: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2824: # uri is the requested domain in this case.
2825: # comparison to 'request.role.domain' shows if the user has selected
2826: # a role of dc for the domain in question.
2827: return 'F' if ($uri eq $ENV{'request.role.domain'});
2828: }
2829:
2830: my $thisallowed='';
2831: my $statecond=0;
2832: my $courseprivid='';
2833:
2834: # Course
2835:
2836: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
2837: $thisallowed.=$1;
2838: }
2839:
2840: # Domain
2841:
2842: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2843: =~/\Q$priv\E\&([^\:]*)/) {
2844: $thisallowed.=$1;
2845: }
2846:
2847: # Course: uri itself is a course
2848: my $courseuri=$uri;
2849: $courseuri=~s/\_(\d)/\/$1/;
2850: $courseuri=~s/^([^\/])/\/$1/;
2851:
2852: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2853: =~/\Q$priv\E\&([^\:]*)/) {
2854: $thisallowed.=$1;
2855: }
2856:
2857: # URI is an uploaded document for this course
2858:
2859: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
2860: my $refuri=$ENV{'httpref.'.$orguri};
2861: if ($refuri) {
2862: if ($refuri =~ m|^/adm/|) {
2863: $thisallowed='F';
2864: }
2865: }
2866: }
2867:
2868: # Full access at system, domain or course-wide level? Exit.
2869:
2870: if ($thisallowed=~/F/) {
2871: return 'F';
2872: }
2873:
2874: # If this is generating or modifying users, exit with special codes
2875:
2876: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:\Q$priv\E\:/) {
2877: return $thisallowed;
2878: }
2879: #
2880: # Gathered so far: system, domain and course wide privileges
2881: #
2882: # Course: See if uri or referer is an individual resource that is part of
2883: # the course
2884:
2885: if ($ENV{'request.course.id'}) {
2886:
2887: $courseprivid=$ENV{'request.course.id'};
2888: if ($ENV{'request.course.sec'}) {
2889: $courseprivid.='/'.$ENV{'request.course.sec'};
2890: }
2891: $courseprivid=~s/\_/\//;
2892: my $checkreferer=1;
2893: my ($match,$cond)=&is_on_map($uri);
2894: if ($match) {
2895: $statecond=$cond;
2896: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2897: =~/\Q$priv\E\&([^\:]*)/) {
2898: $thisallowed.=$1;
2899: $checkreferer=0;
2900: }
2901: }
2902:
2903: if ($checkreferer) {
2904: my $refuri=$ENV{'httpref.'.$orguri};
2905: unless ($refuri) {
2906: foreach (keys %ENV) {
2907: if ($_=~/^httpref\..*\*/) {
2908: my $pattern=$_;
2909: $pattern=~s/^httpref\.\/res\///;
2910: $pattern=~s/\*/\[\^\/\]\+/g;
2911: $pattern=~s/\//\\\//g;
2912: if ($orguri=~/$pattern/) {
2913: $refuri=$ENV{$_};
2914: }
2915: }
2916: }
2917: }
2918:
2919: if ($refuri) {
2920: $refuri=&declutter($refuri);
2921: my ($match,$cond)=&is_on_map($refuri);
2922: if ($match) {
2923: my $refstatecond=$cond;
2924: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2925: =~/\Q$priv\E\&([^\:]*)/) {
2926: $thisallowed.=$1;
2927: $uri=$refuri;
2928: $statecond=$refstatecond;
2929: }
2930: }
2931: }
2932: }
2933: }
2934:
2935: #
2936: # Gathered now: all privileges that could apply, and condition number
2937: #
2938: #
2939: # Full or no access?
2940: #
2941:
2942: if ($thisallowed=~/F/) {
2943: return 'F';
2944: }
2945:
2946: unless ($thisallowed) {
2947: return '';
2948: }
2949:
2950: # Restrictions exist, deal with them
2951: #
2952: # C:according to course preferences
2953: # R:according to resource settings
2954: # L:unless locked
2955: # X:according to user session state
2956: #
2957:
2958: # Possibly locked functionality, check all courses
2959: # Locks might take effect only after 10 minutes cache expiration for other
2960: # courses, and 2 minutes for current course
2961:
2962: my $envkey;
2963: if ($thisallowed=~/L/) {
2964: foreach $envkey (keys %ENV) {
2965: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2966: my $courseid=$2;
2967: my $roleid=$1.'.'.$2;
2968: $courseid=~s/^\///;
2969: my $expiretime=600;
2970: if ($ENV{'request.role'} eq $roleid) {
2971: $expiretime=120;
2972: }
2973: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2974: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2975: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2976: &coursedescription($courseid);
2977: }
2978: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
2979: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2980: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2981: &log($ENV{'user.domain'},$ENV{'user.name'},
2982: $ENV{'user.home'},
2983: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2984: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2985: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2986: return '';
2987: }
2988: }
2989: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
2990: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2991: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2992: &log($ENV{'user.domain'},$ENV{'user.name'},
2993: $ENV{'user.home'},
2994: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2995: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2996: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2997: return '';
2998: }
2999: }
3000: }
3001: }
3002: }
3003:
3004: #
3005: # Rest of the restrictions depend on selected course
3006: #
3007:
3008: unless ($ENV{'request.course.id'}) {
3009: return '1';
3010: }
3011:
3012: #
3013: # Now user is definitely in a course
3014: #
3015:
3016:
3017: # Course preferences
3018:
3019: if ($thisallowed=~/C/) {
3020: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
3021: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
3022: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
3023: =~/\Q$rolecode\E/) {
3024: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
3025: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3026: $ENV{'request.course.id'});
3027: return '';
3028: }
3029:
3030: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
3031: =~/\Q$unamedom\E/) {
3032: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
3033: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3034: $ENV{'request.course.id'});
3035: return '';
3036: }
3037: }
3038:
3039: # Resource preferences
3040:
3041: if ($thisallowed=~/R/) {
3042: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
3043: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3044: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
3045: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3046: return '';
3047: }
3048: }
3049:
3050: # Restricted by state or randomout?
3051:
3052: if ($thisallowed=~/X/) {
3053: if ($ENV{'acc.randomout'}) {
3054: my $symb=&symbread($uri,1);
3055: if (($symb) && ($ENV{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3056: return '';
3057: }
3058: }
3059: if (&condval($statecond)) {
3060: return '2';
3061: } else {
3062: return '';
3063: }
3064: }
3065:
3066: return 'F';
3067: }
3068:
3069: # --------------------------------------------------- Is a resource on the map?
3070:
3071: sub is_on_map {
3072: my $uri=&declutter(shift);
3073: $uri=~s/\.\d+\.(\w+)$/\.$1/;
3074: my @uriparts=split(/\//,$uri);
3075: my $filename=$uriparts[$#uriparts];
3076: my $pathname=$uri;
3077: $pathname=~s|/\Q$filename\E$||;
3078: $pathname=~s/^adm\/wrapper\///;
3079: #Trying to find the conditional for the file
3080: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
3081: /\&\Q$filename\E\:([\d\|]+)\&/);
3082: if ($match) {
3083: return (1,$1);
3084: } else {
3085: return (0,0);
3086: }
3087: }
3088:
3089: # --------------------------------------------------------- Get symb from alias
3090:
3091: sub get_symb_from_alias {
3092: my $symb=shift;
3093: my ($map,$resid,$url)=&decode_symb($symb);
3094: # Already is a symb
3095: if ($url) { return $symb; }
3096: # Must be an alias
3097: my $aliassymb='';
3098: my %bighash;
3099: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3100: &GDBM_READER(),0640)) {
3101: my $rid=$bighash{'mapalias_'.$symb};
3102: if ($rid) {
3103: my ($mapid,$resid)=split(/\./,$rid);
3104: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3105: $resid,$bighash{'src_'.$rid});
3106: }
3107: untie %bighash;
3108: }
3109: return $aliassymb;
3110: }
3111:
3112: # ----------------------------------------------------------------- Define Role
3113:
3114: sub definerole {
3115: if (allowed('mcr','/')) {
3116: my ($rolename,$sysrole,$domrole,$courole)=@_;
3117: foreach (split(':',$sysrole)) {
3118: my ($crole,$cqual)=split(/\&/,$_);
3119: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3120: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3121: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3122: return "refused:s:$crole&$cqual";
3123: }
3124: }
3125: }
3126: foreach (split(':',$domrole)) {
3127: my ($crole,$cqual)=split(/\&/,$_);
3128: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3129: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3130: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3131: return "refused:d:$crole&$cqual";
3132: }
3133: }
3134: }
3135: foreach (split(':',$courole)) {
3136: my ($crole,$cqual)=split(/\&/,$_);
3137: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3138: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3139: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3140: return "refused:c:$crole&$cqual";
3141: }
3142: }
3143: }
3144: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3145: "$ENV{'user.domain'}:$ENV{'user.name'}:".
3146: "rolesdef_$rolename=".
3147: escape($sysrole.'_'.$domrole.'_'.$courole);
3148: return reply($command,$ENV{'user.home'});
3149: } else {
3150: return 'refused';
3151: }
3152: }
3153:
3154: # ---------------- Make a metadata query against the network of library servers
3155:
3156: sub metadata_query {
3157: my ($query,$custom,$customshow,$server_array)=@_;
3158: my %rhash;
3159: my @server_list = (defined($server_array) ? @$server_array
3160: : keys(%libserv) );
3161: for my $server (@server_list) {
3162: unless ($custom or $customshow) {
3163: my $reply=&reply("querysend:".&escape($query),$server);
3164: $rhash{$server}=$reply;
3165: }
3166: else {
3167: my $reply=&reply("querysend:".&escape($query).':'.
3168: &escape($custom).':'.&escape($customshow),
3169: $server);
3170: $rhash{$server}=$reply;
3171: }
3172: }
3173: return \%rhash;
3174: }
3175:
3176: # ----------------------------------------- Send log queries and wait for reply
3177:
3178: sub log_query {
3179: my ($uname,$udom,$query,%filters)=@_;
3180: my $uhome=&homeserver($uname,$udom);
3181: if ($uhome eq 'no_host') { return 'error: no_host'; }
3182: my $uhost=$hostname{$uhome};
3183: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3184: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3185: $uhome);
3186: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3187: return get_query_reply($queryid);
3188: }
3189:
3190: # ------- Request retrieval of institutional classlists for course(s)
3191:
3192: sub fetch_enrollment_query {
3193: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3194: my $homeserver;
3195: my $maxtries = 1;
3196: if ($context eq 'automated') {
3197: $homeserver = $perlvar{'lonHostID'};
3198: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3199: } else {
3200: $homeserver = &homeserver($cnum,$dom);
3201: }
3202: my $host=$hostname{$homeserver};
3203: my $cmd = '';
3204: foreach (keys %{$affiliatesref}) {
3205: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3206: }
3207: $cmd =~ s/%%$//;
3208: $cmd = &escape($cmd);
3209: my $query = 'fetchenrollment';
3210: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$ENV{'user.name'}.':'.$cmd,$homeserver);
3211: unless ($queryid=~/^\Q$host\E\_/) {
3212: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3213: return 'error: '.$queryid;
3214: }
3215: my $reply = &get_query_reply($queryid);
3216: my $tries = 1;
3217: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3218: $reply = &get_query_reply($queryid);
3219: $tries ++;
3220: }
3221: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3222: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$ENV{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3223: } else {
3224: my @responses = split/:/,$reply;
3225: if ($homeserver eq $perlvar{'lonHostID'}) {
3226: foreach (@responses) {
3227: my ($key,$value) = split/=/,$_;
3228: $$replyref{$key} = $value;
3229: }
3230: } else {
3231: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3232: foreach (@responses) {
3233: my ($key,$value) = split/=/,$_;
3234: $$replyref{$key} = $value;
3235: if ($value > 0) {
3236: foreach (@{$$affiliatesref{$key}}) {
3237: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3238: my $destname = $pathname.'/'.$filename;
3239: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3240: if ($xml_classlist =~ /^error/) {
3241: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3242: } else {
3243: if ( open(FILE,">$destname") ) {
3244: print FILE &unescape($xml_classlist);
3245: close(FILE);
3246: } else {
3247: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3248: }
3249: }
3250: }
3251: }
3252: }
3253: }
3254: return 'ok';
3255: }
3256: return 'error';
3257: }
3258:
3259: sub get_query_reply {
3260: my $queryid=shift;
3261: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3262: my $reply='';
3263: for (1..100) {
3264: sleep 2;
3265: if (-e $replyfile.'.end') {
3266: if (open(my $fh,$replyfile)) {
3267: $reply.=<$fh>;
3268: close($fh);
3269: } else { return 'error: reply_file_error'; }
3270: return &unescape($reply);
3271: }
3272: }
3273: return 'timeout:'.$queryid;
3274: }
3275:
3276: sub courselog_query {
3277: #
3278: # possible filters:
3279: # url: url or symb
3280: # username
3281: # domain
3282: # action: view, submit, grade
3283: # start: timestamp
3284: # end: timestamp
3285: #
3286: my (%filters)=@_;
3287: unless ($ENV{'request.course.id'}) { return 'no_course'; }
3288: if ($filters{'url'}) {
3289: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3290: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3291: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3292: }
3293: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
3294: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
3295: return &log_query($cname,$cdom,'courselog',%filters);
3296: }
3297:
3298: sub userlog_query {
3299: my ($uname,$udom,%filters)=@_;
3300: return &log_query($uname,$udom,'userlog',%filters);
3301: }
3302:
3303: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3304:
3305: sub auto_run {
3306: my ($cnum,$cdom) = @_;
3307: my $homeserver = &homeserver($cnum,$cdom);
3308: my $response = &reply('autorun:'.$cdom,$homeserver);
3309: return $response;
3310: }
3311:
3312: sub auto_get_sections {
3313: my ($cnum,$cdom,$inst_coursecode) = @_;
3314: my $homeserver = &homeserver($cnum,$cdom);
3315: my @secs = ();
3316: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3317: unless ($response eq 'refused') {
3318: @secs = split/:/,$response;
3319: }
3320: return @secs;
3321: }
3322:
3323: sub auto_new_course {
3324: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3325: my $homeserver = &homeserver($cnum,$cdom);
3326: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3327: return $response;
3328: }
3329:
3330: sub auto_validate_courseID {
3331: my ($cnum,$cdom,$inst_course_id) = @_;
3332: my $homeserver = &homeserver($cnum,$cdom);
3333: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3334: return $response;
3335: }
3336:
3337: sub auto_create_password {
3338: my ($cnum,$cdom,$authparam) = @_;
3339: my $homeserver = &homeserver($cnum,$cdom);
3340: my $create_passwd = 0;
3341: my $authchk = '';
3342: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3343: if ($response eq 'refused') {
3344: $authchk = 'refused';
3345: } else {
3346: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3347: }
3348: return ($authparam,$create_passwd,$authchk);
3349: }
3350:
3351: sub auto_instcode_format {
3352: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3353: my $courses = '';
3354: my $homeserver;
3355: if ($caller eq 'global') {
3356: $homeserver = $perlvar{'lonHostID'};
3357: } else {
3358: $homeserver = &homeserver($caller,$codedom);
3359: }
3360: my $host=$hostname{$homeserver};
3361: foreach (keys %{$instcodes}) {
3362: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3363: }
3364: chop($courses);
3365: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3366: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3367: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3368: %{$codes} = &str2hash($codes_str);
3369: @{$codetitles} = &str2array($codetitles_str);
3370: %{$cat_titles} = &str2hash($cat_titles_str);
3371: %{$cat_order} = &str2hash($cat_order_str);
3372: return 'ok';
3373: }
3374: return $response;
3375: }
3376:
3377: # ------------------------------------------------------------------ Plain Text
3378:
3379: sub plaintext {
3380: my $short=shift;
3381: return &mt($prp{$short});
3382: }
3383:
3384: # ----------------------------------------------------------------- Assign Role
3385:
3386: sub assignrole {
3387: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3388: my $mrole;
3389: if ($role =~ /^cr\//) {
3390: my $cwosec=$url;
3391: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3392: unless (&allowed('ccr',$cwosec)) {
3393: &logthis('Refused custom assignrole: '.
3394: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3395: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3396: return 'refused';
3397: }
3398: $mrole='cr';
3399: } else {
3400: my $cwosec=$url;
3401: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3402: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3403: &logthis('Refused assignrole: '.
3404: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3405: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3406: return 'refused';
3407: }
3408: $mrole=$role;
3409: }
3410: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3411: "$udom:$uname:$url".'_'."$mrole=$role";
3412: if ($end) { $command.='_'.$end; }
3413: if ($start) {
3414: if ($end) {
3415: $command.='_'.$start;
3416: } else {
3417: $command.='_0_'.$start;
3418: }
3419: }
3420: # actually delete
3421: if ($deleteflag) {
3422: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3423: # modify command to delete the role
3424: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
3425: "$udom:$uname:$url".'_'."$mrole";
3426: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
3427: # set start and finish to negative values for userrolelog
3428: $start=-1;
3429: $end=-1;
3430: }
3431: }
3432: # send command
3433: my $answer=&reply($command,&homeserver($uname,$udom));
3434: # log new user role if status is ok
3435: if ($answer eq 'ok') {
3436: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
3437: }
3438: return $answer;
3439: }
3440:
3441: # -------------------------------------------------- Modify user authentication
3442: # Overrides without validation
3443:
3444: sub modifyuserauth {
3445: my ($udom,$uname,$umode,$upass)=@_;
3446: my $uhome=&homeserver($uname,$udom);
3447: unless (&allowed('mau',$udom)) { return 'refused'; }
3448: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3449: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3450: ' in domain '.$ENV{'request.role.domain'});
3451: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3452: &escape($upass),$uhome);
3453: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
3454: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3455: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3456: &log($udom,,$uname,$uhome,
3457: 'Authentication changed by '.$ENV{'user.domain'}.', '.
3458: $ENV{'user.name'}.', '.$umode.
3459: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3460: unless ($reply eq 'ok') {
3461: &logthis('Authentication mode error: '.$reply);
3462: return 'error: '.$reply;
3463: }
3464: return 'ok';
3465: }
3466:
3467: # --------------------------------------------------------------- Modify a user
3468:
3469: sub modifyuser {
3470: my ($udom, $uname, $uid,
3471: $umode, $upass, $first,
3472: $middle, $last, $gene,
3473: $forceid, $desiredhome, $email)=@_;
3474: $udom=~s/\W//g;
3475: $uname=~s/\W//g;
3476: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3477: $umode.', '.$first.', '.$middle.', '.
3478: $last.', '.$gene.'(forceid: '.$forceid.')'.
3479: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3480: ' desiredhome not specified').
3481: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3482: ' in domain '.$ENV{'request.role.domain'});
3483: my $uhome=&homeserver($uname,$udom,'true');
3484: # ----------------------------------------------------------------- Create User
3485: if (($uhome eq 'no_host') &&
3486: (($umode && $upass) || ($umode eq 'localauth'))) {
3487: my $unhome='';
3488: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3489: $unhome = $desiredhome;
3490: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
3491: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
3492: } else { # load balancing routine for determining $unhome
3493: my $tryserver;
3494: my $loadm=10000000;
3495: foreach $tryserver (keys %libserv) {
3496: if ($hostdom{$tryserver} eq $udom) {
3497: my $answer=reply('load',$tryserver);
3498: if (($answer=~/\d+/) && ($answer<$loadm)) {
3499: $loadm=$answer;
3500: $unhome=$tryserver;
3501: }
3502: }
3503: }
3504: }
3505: if (($unhome eq '') || ($unhome eq 'no_host')) {
3506: return 'error: unable to find a home server for '.$uname.
3507: ' in domain '.$udom;
3508: }
3509: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3510: &escape($upass),$unhome);
3511: unless ($reply eq 'ok') {
3512: return 'error: '.$reply;
3513: }
3514: $uhome=&homeserver($uname,$udom,'true');
3515: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3516: return 'error: unable verify users home machine.';
3517: }
3518: } # End of creation of new user
3519: # ---------------------------------------------------------------------- Add ID
3520: if ($uid) {
3521: $uid=~tr/A-Z/a-z/;
3522: my %uidhash=&idrget($udom,$uname);
3523: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3524: && (!$forceid)) {
3525: unless ($uid eq $uidhash{$uname}) {
3526: return 'error: user id "'.$uid.'" does not match '.
3527: 'current user id "'.$uidhash{$uname}.'".';
3528: }
3529: } else {
3530: &idput($udom,($uname => $uid));
3531: }
3532: }
3533: # -------------------------------------------------------------- Add names, etc
3534: my @tmp=&get('environment',
3535: ['firstname','middlename','lastname','generation'],
3536: $udom,$uname);
3537: my %names;
3538: if ($tmp[0] =~ m/^error:.*/) {
3539: %names=();
3540: } else {
3541: %names = @tmp;
3542: }
3543: #
3544: # Make sure to not trash student environment if instructor does not bother
3545: # to supply name and email information
3546: #
3547: if ($first) { $names{'firstname'} = $first; }
3548: if (defined($middle)) { $names{'middlename'} = $middle; }
3549: if ($last) { $names{'lastname'} = $last; }
3550: if (defined($gene)) { $names{'generation'} = $gene; }
3551: if ($email) { $names{'notification'} = $email;
3552: $names{'critnotification'} = $email; }
3553:
3554: my $reply = &put('environment', \%names, $udom,$uname);
3555: if ($reply ne 'ok') { return 'error: '.$reply; }
3556: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
3557: $umode.', '.$first.', '.$middle.', '.
3558: $last.', '.$gene.' by '.
3559: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3560: return 'ok';
3561: }
3562:
3563: # -------------------------------------------------------------- Modify student
3564:
3565: sub modifystudent {
3566: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3567: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
3568: if (!$cid) {
3569: unless ($cid=$ENV{'request.course.id'}) {
3570: return 'not_in_class';
3571: }
3572: }
3573: # --------------------------------------------------------------- Make the user
3574: my $reply=&modifyuser
3575: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
3576: $desiredhome,$email);
3577: unless ($reply eq 'ok') { return $reply; }
3578: # This will cause &modify_student_enrollment to get the uid from the
3579: # students environment
3580: $uid = undef if (!$forceid);
3581: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
3582: $gene,$usec,$end,$start,$type,$locktype,$cid);
3583: return $reply;
3584: }
3585:
3586: sub modify_student_enrollment {
3587: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
3588: my ($cdom,$cnum,$chome);
3589: if (!$cid) {
3590: unless ($cid=$ENV{'request.course.id'}) {
3591: return 'not_in_class';
3592: }
3593: $cdom=$ENV{'course.'.$cid.'.domain'};
3594: $cnum=$ENV{'course.'.$cid.'.num'};
3595: } else {
3596: ($cdom,$cnum)=split(/_/,$cid);
3597: }
3598: $chome=$ENV{'course.'.$cid.'.home'};
3599: if (!$chome) {
3600: $chome=&homeserver($cnum,$cdom);
3601: }
3602: if (!$chome) { return 'unknown_course'; }
3603: # Make sure the user exists
3604: my $uhome=&homeserver($uname,$udom);
3605: if (($uhome eq '') || ($uhome eq 'no_host')) {
3606: return 'error: no such user';
3607: }
3608: # Get student data if we were not given enough information
3609: if (!defined($first) || $first eq '' ||
3610: !defined($last) || $last eq '' ||
3611: !defined($uid) || $uid eq '' ||
3612: !defined($middle) || $middle eq '' ||
3613: !defined($gene) || $gene eq '') {
3614: # They did not supply us with enough data to enroll the student, so
3615: # we need to pick up more information.
3616: my %tmp = &get('environment',
3617: ['firstname','middlename','lastname', 'generation','id']
3618: ,$udom,$uname);
3619:
3620: #foreach (keys(%tmp)) {
3621: # &logthis("key $_ = ".$tmp{$_});
3622: #}
3623: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3624: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3625: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3626: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3627: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3628: }
3629: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
3630: $first,$middle);
3631: my $reply=cput('classlist',
3632: {"$uname:$udom" =>
3633: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
3634: $cdom,$cnum);
3635: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3636: return 'error: '.$reply;
3637: }
3638: # Add student role to user
3639: my $uurl='/'.$cid;
3640: $uurl=~s/\_/\//g;
3641: if ($usec) {
3642: $uurl.='/'.$usec;
3643: }
3644: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3645: }
3646:
3647: # ------------------------------------------------- Write to course preferences
3648:
3649: sub writecoursepref {
3650: my ($courseid,%prefs)=@_;
3651: $courseid=~s/^\///;
3652: $courseid=~s/\_/\//g;
3653: my ($cdomain,$cnum)=split(/\//,$courseid);
3654: my $chome=homeserver($cnum,$cdomain);
3655: if (($chome eq '') || ($chome eq 'no_host')) {
3656: return 'error: no such course';
3657: }
3658: my $cstring='';
3659: foreach (keys %prefs) {
3660: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3661: }
3662: $cstring=~s/\&$//;
3663: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3664: }
3665:
3666: # ---------------------------------------------------------- Make/modify course
3667:
3668: sub createcourse {
3669: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code)=@_;
3670: $url=&declutter($url);
3671: my $cid='';
3672: unless (&allowed('ccc',$udom)) {
3673: return 'refused';
3674: }
3675: # ------------------------------------------------------------------- Create ID
3676: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3677: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3678: # ----------------------------------------------- Make sure that does not exist
3679: my $uhome=&homeserver($uname,$udom,'true');
3680: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3681: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3682: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3683: $uhome=&homeserver($uname,$udom,'true');
3684: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3685: return 'error: unable to generate unique course-ID';
3686: }
3687: }
3688: # ------------------------------------------------ Check supplied server name
3689: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3690: if (! exists($libserv{$course_server})) {
3691: return 'error:bad server name '.$course_server;
3692: }
3693: # ------------------------------------------------------------- Make the course
3694: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3695: $course_server);
3696: unless ($reply eq 'ok') { return 'error: '.$reply; }
3697: $uhome=&homeserver($uname,$udom,'true');
3698: if (($uhome eq '') || ($uhome eq 'no_host')) {
3699: return 'error: no such course';
3700: }
3701: # ----------------------------------------------------------------- Course made
3702: # log existence
3703: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
3704: '='.&escape($inst_code),$uhome);
3705: &flushcourselogs();
3706: # set toplevel url
3707: my $topurl=$url;
3708: unless ($nonstandard) {
3709: # ------------------------------------------ For standard courses, make top url
3710: my $mapurl=&clutter($url);
3711: if ($mapurl eq '/res/') { $mapurl=''; }
3712: $ENV{'form.initmap'}=(<<ENDINITMAP);
3713: <map>
3714: <resource id="1" type="start"></resource>
3715: <resource id="2" src="$mapurl"></resource>
3716: <resource id="3" type="finish"></resource>
3717: <link index="1" from="1" to="2"></link>
3718: <link index="2" from="2" to="3"></link>
3719: </map>
3720: ENDINITMAP
3721: $topurl=&declutter(
3722: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3723: );
3724: }
3725: # ----------------------------------------------------------- Write preferences
3726: &writecoursepref($udom.'_'.$uname,
3727: ('description' => $description,
3728: 'url' => $topurl));
3729: return '/'.$udom.'/'.$uname;
3730: }
3731:
3732: # ---------------------------------------------------------- Assign Custom Role
3733:
3734: sub assigncustomrole {
3735: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3736: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3737: $end,$start,$deleteflag);
3738: }
3739:
3740: # ----------------------------------------------------------------- Revoke Role
3741:
3742: sub revokerole {
3743: my ($udom,$uname,$url,$role,$deleteflag)=@_;
3744: my $now=time;
3745: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
3746: }
3747:
3748: # ---------------------------------------------------------- Revoke Custom Role
3749:
3750: sub revokecustomrole {
3751: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
3752: my $now=time;
3753: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3754: $deleteflag);
3755: }
3756:
3757: # ------------------------------------------------------------ Disk usage
3758: sub diskusage {
3759: my ($udom,$uname,$directoryRoot)=@_;
3760: $directoryRoot =~ s/\/$//;
3761: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
3762: return $listing;
3763: }
3764:
3765:
3766: # ------------------------------------------------------------ Directory lister
3767:
3768: sub dirlist {
3769: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3770:
3771: $uri=~s/^\///;
3772: $uri=~s/\/$//;
3773: my ($udom, $uname);
3774: (undef,$udom,$uname)=split(/\//,$uri);
3775: if(defined($userdomain)) {
3776: $udom = $userdomain;
3777: }
3778: if(defined($username)) {
3779: $uname = $username;
3780: }
3781:
3782: my $dirRoot = $perlvar{'lonDocRoot'};
3783: if(defined($alternateDirectoryRoot)) {
3784: $dirRoot = $alternateDirectoryRoot;
3785: $dirRoot =~ s/\/$//;
3786: }
3787:
3788: if($udom) {
3789: if($uname) {
3790: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
3791: homeserver($uname,$udom));
3792: return split(/:/,$listing);
3793: } elsif(!defined($alternateDirectoryRoot)) {
3794: my $tryserver;
3795: my %allusers=();
3796: foreach $tryserver (keys %libserv) {
3797: if($hostdom{$tryserver} eq $udom) {
3798: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3799: $udom, $tryserver);
3800: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
3801: && ($listing ne 'con_lost')) {
3802: foreach (split(/:/,$listing)) {
3803: my ($entry,@stat)=split(/&/,$_);
3804: $allusers{$entry}=1;
3805: }
3806: }
3807: }
3808: }
3809: my $alluserstr='';
3810: foreach (sort keys %allusers) {
3811: $alluserstr.=$_.'&user:';
3812: }
3813: $alluserstr=~s/:$//;
3814: return split(/:/,$alluserstr);
3815: } else {
3816: my @emptyResults = ();
3817: push(@emptyResults, 'missing user name');
3818: return split(':',@emptyResults);
3819: }
3820: } elsif(!defined($alternateDirectoryRoot)) {
3821: my $tryserver;
3822: my %alldom=();
3823: foreach $tryserver (keys %libserv) {
3824: $alldom{$hostdom{$tryserver}}=1;
3825: }
3826: my $alldomstr='';
3827: foreach (sort keys %alldom) {
3828: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
3829: }
3830: $alldomstr=~s/:$//;
3831: return split(/:/,$alldomstr);
3832: } else {
3833: my @emptyResults = ();
3834: push(@emptyResults, 'missing domain');
3835: return split(':',@emptyResults);
3836: }
3837: }
3838:
3839: # --------------------------------------------- GetFileTimestamp
3840: # This function utilizes dirlist and returns the date stamp for
3841: # when it was last modified. It will also return an error of -1
3842: # if an error occurs
3843:
3844: ##
3845: ## FIXME: This subroutine assumes its caller knows something about the
3846: ## directory structure of the home server for the student ($root).
3847: ## Not a good assumption to make. Since this is for looking up files
3848: ## in user directories, the full path should be constructed by lond, not
3849: ## whatever machine we request data from.
3850: ##
3851: sub GetFileTimestamp {
3852: my ($studentDomain,$studentName,$filename,$root)=@_;
3853: $studentDomain=~s/\W//g;
3854: $studentName=~s/\W//g;
3855: my $subdir=$studentName.'__';
3856: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3857: my $proname="$studentDomain/$subdir/$studentName";
3858: $proname .= '/'.$filename;
3859: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
3860: $studentName, $root);
3861: my @stats = split('&', $fileStat);
3862: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
3863: # @stats contains first the filename, then the stat output
3864: return $stats[10]; # so this is 10 instead of 9.
3865: } else {
3866: return -1;
3867: }
3868: }
3869:
3870: # -------------------------------------------------------- Value of a Condition
3871:
3872: sub directcondval {
3873: my $number=shift;
3874: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
3875: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
3876: } else {
3877: return 2;
3878: }
3879: }
3880:
3881: sub condval {
3882: my $condidx=shift;
3883: my $result=0;
3884: my $allpathcond='';
3885: foreach (split(/\|/,$condidx)) {
3886: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
3887: $allpathcond.=
3888: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
3889: }
3890: }
3891: $allpathcond=~s/\|$//;
3892: if ($ENV{'request.course.id'}) {
3893: if ($allpathcond) {
3894: my $operand='|';
3895: my @stack;
3896: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
3897: if ($_ eq '(') {
3898: push @stack,($operand,$result)
3899: } elsif ($_ eq ')') {
3900: my $before=pop @stack;
3901: if (pop @stack eq '&') {
3902: $result=$result>$before?$before:$result;
3903: } else {
3904: $result=$result>$before?$result:$before;
3905: }
3906: } elsif (($_ eq '&') || ($_ eq '|')) {
3907: $operand=$_;
3908: } else {
3909: my $new=directcondval($_);
3910: if ($operand eq '&') {
3911: $result=$result>$new?$new:$result;
3912: } else {
3913: $result=$result>$new?$result:$new;
3914: }
3915: }
3916: }
3917: }
3918: }
3919: return $result;
3920: }
3921:
3922: # ---------------------------------------------------- Devalidate courseresdata
3923:
3924: sub devalidatecourseresdata {
3925: my ($coursenum,$coursedomain)=@_;
3926: my $hashid=$coursenum.':'.$coursedomain;
3927: &devalidate_cache(\%courseresdatacache,$hashid,'courseres');
3928: }
3929:
3930: # --------------------------------------------------- Course Resourcedata Query
3931:
3932: sub courseresdata {
3933: my ($coursenum,$coursedomain,@which)=@_;
3934: my $coursehom=&homeserver($coursenum,$coursedomain);
3935: my $hashid=$coursenum.':'.$coursedomain;
3936: my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid,'courseres');
3937: unless (defined($cached)) {
3938: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
3939: $result=\%dumpreply;
3940: my ($tmp) = keys(%dumpreply);
3941: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
3942: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
3943: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3944: return $tmp;
3945: } elsif ($tmp =~ /^(error)/) {
3946: $result=undef;
3947: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
3948: }
3949: }
3950: foreach my $item (@which) {
3951: if (defined($result->{$item})) {
3952: return $result->{$item};
3953: }
3954: }
3955: return undef;
3956: }
3957:
3958: #
3959: # EXT resource caching routines
3960: #
3961:
3962: sub clear_EXT_cache_status {
3963: &delenv('cache.EXT.');
3964: }
3965:
3966: sub EXT_cache_status {
3967: my ($target_domain,$target_user) = @_;
3968: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3969: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
3970: # We know already the user has no data
3971: return 1;
3972: } else {
3973: return 0;
3974: }
3975: }
3976:
3977: sub EXT_cache_set {
3978: my ($target_domain,$target_user) = @_;
3979: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3980: &appenv($cachename => time);
3981: }
3982:
3983: # --------------------------------------------------------- Value of a Variable
3984: sub EXT {
3985: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
3986:
3987: unless ($varname) { return ''; }
3988: #get real user name/domain, courseid and symb
3989: my $courseid;
3990: my $publicuser;
3991: if ($symbparm) {
3992: $symbparm=&get_symb_from_alias($symbparm);
3993: }
3994: if (!($uname && $udom)) {
3995: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
3996: &Apache::lonxml::whichuser($symbparm);
3997: if (!$symbparm) { $symbparm=$cursymb; }
3998: } else {
3999: $courseid=$ENV{'request.course.id'};
4000: }
4001: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
4002: my $rest;
4003: if (defined($therest[0])) {
4004: $rest=join('.',@therest);
4005: } else {
4006: $rest='';
4007: }
4008:
4009: my $qualifierrest=$qualifier;
4010: if ($rest) { $qualifierrest.='.'.$rest; }
4011: my $spacequalifierrest=$space;
4012: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
4013: if ($realm eq 'user') {
4014: # --------------------------------------------------------------- user.resource
4015: if ($space eq 'resource') {
4016: if (defined($Apache::lonhomework::parsing_a_problem)) {
4017: return $Apache::lonhomework::history{$qualifierrest};
4018: } else {
4019: my %restored;
4020: if ($publicuser || $ENV{'request.state'} eq 'construct') {
4021: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
4022: } else {
4023: %restored=&restore($symbparm,$courseid,$udom,$uname);
4024: }
4025: return $restored{$qualifierrest};
4026: }
4027: # ----------------------------------------------------------------- user.access
4028: } elsif ($space eq 'access') {
4029: # FIXME - not supporting calls for a specific user
4030: return &allowed($qualifier,$rest);
4031: # ------------------------------------------ user.preferences, user.environment
4032: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
4033: if (($uname eq $ENV{'user.name'}) &&
4034: ($udom eq $ENV{'user.domain'})) {
4035: return $ENV{join('.',('environment',$qualifierrest))};
4036: } else {
4037: my %returnhash;
4038: if (!$publicuser) {
4039: %returnhash=&userenvironment($udom,$uname,
4040: $qualifierrest);
4041: }
4042: return $returnhash{$qualifierrest};
4043: }
4044: # ----------------------------------------------------------------- user.course
4045: } elsif ($space eq 'course') {
4046: # FIXME - not supporting calls for a specific user
4047: return $ENV{join('.',('request.course',$qualifier))};
4048: # ------------------------------------------------------------------- user.role
4049: } elsif ($space eq 'role') {
4050: # FIXME - not supporting calls for a specific user
4051: my ($role,$where)=split(/\./,$ENV{'request.role'});
4052: if ($qualifier eq 'value') {
4053: return $role;
4054: } elsif ($qualifier eq 'extent') {
4055: return $where;
4056: }
4057: # ----------------------------------------------------------------- user.domain
4058: } elsif ($space eq 'domain') {
4059: return $udom;
4060: # ------------------------------------------------------------------- user.name
4061: } elsif ($space eq 'name') {
4062: return $uname;
4063: # ---------------------------------------------------- Any other user namespace
4064: } else {
4065: my %reply;
4066: if (!$publicuser) {
4067: %reply=&get($space,[$qualifierrest],$udom,$uname);
4068: }
4069: return $reply{$qualifierrest};
4070: }
4071: } elsif ($realm eq 'query') {
4072: # ---------------------------------------------- pull stuff out of query string
4073: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
4074: [$spacequalifierrest]);
4075: return $ENV{'form.'.$spacequalifierrest};
4076: } elsif ($realm eq 'request') {
4077: # ------------------------------------------------------------- request.browser
4078: if ($space eq 'browser') {
4079: if ($qualifier eq 'textremote') {
4080: if (&mt('textual_remote_display') eq 'on') {
4081: return 1;
4082: } else {
4083: return 0;
4084: }
4085: } else {
4086: return $ENV{'browser.'.$qualifier};
4087: }
4088: # ------------------------------------------------------------ request.filename
4089: } else {
4090: return $ENV{'request.'.$spacequalifierrest};
4091: }
4092: } elsif ($realm eq 'course') {
4093: # ---------------------------------------------------------- course.description
4094: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
4095: } elsif ($realm eq 'resource') {
4096:
4097: my $section;
4098: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
4099: if (!$symbparm) { $symbparm=&symbread(); }
4100: }
4101: if ($symbparm && defined($courseid) &&
4102: $courseid eq $ENV{'request.course.id'}) {
4103:
4104: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
4105:
4106: # ----------------------------------------------------- Cascading lookup scheme
4107: my $symbp=$symbparm;
4108: my $mapp=(&decode_symb($symbp))[0];
4109:
4110: my $symbparm=$symbp.'.'.$spacequalifierrest;
4111: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
4112:
4113: if (($ENV{'user.name'} eq $uname) &&
4114: ($ENV{'user.domain'} eq $udom)) {
4115: $section=$ENV{'request.course.sec'};
4116: } else {
4117: if (! defined($usection)) {
4118: $section=&usection($udom,$uname,$courseid);
4119: } else {
4120: $section = $usection;
4121: }
4122: }
4123:
4124: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
4125: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
4126: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
4127:
4128: my $courselevel=$courseid.'.'.$spacequalifierrest;
4129: my $courselevelr=$courseid.'.'.$symbparm;
4130: my $courselevelm=$courseid.'.'.$mapparm;
4131:
4132: # ----------------------------------------------------------- first, check user
4133: #most student don\'t have any data set, check if there is some data
4134: if (! &EXT_cache_status($udom,$uname)) {
4135: my $hashid="$udom:$uname";
4136: my ($result,$cached)=&is_cached(\%userresdatacache,$hashid,
4137: 'userres');
4138: if (!defined($cached)) {
4139: my %resourcedata=&dump('resourcedata',$udom,$uname);
4140: $result=\%resourcedata;
4141: &do_cache(\%userresdatacache,$hashid,$result,'userres');
4142: }
4143: my ($tmp)=keys(%$result);
4144: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4145: if ($$result{$courselevelr}) {
4146: return $$result{$courselevelr}; }
4147: if ($$result{$courselevelm}) {
4148: return $$result{$courselevelm}; }
4149: if ($$result{$courselevel}) {
4150: return $$result{$courselevel}; }
4151: } else {
4152: #error 2 occurs when the .db doesn't exist
4153: if ($tmp!~/error: 2 /) {
4154: &logthis("<font color=blue>WARNING:".
4155: " Trying to get resource data for ".
4156: $uname." at ".$udom.": ".
4157: $tmp."</font>");
4158: } elsif ($tmp=~/error: 2 /) {
4159: &EXT_cache_set($udom,$uname);
4160: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4161: return $tmp;
4162: }
4163: }
4164: }
4165:
4166: # -------------------------------------------------------- second, check course
4167:
4168: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
4169: $ENV{'course.'.$courseid.'.domain'},
4170: ($seclevelr,$seclevelm,$seclevel,
4171: $courselevelr,$courselevelm,
4172: $courselevel));
4173: if (defined($coursereply)) { return $coursereply; }
4174:
4175: # ------------------------------------------------------ third, check map parms
4176: my %parmhash=();
4177: my $thisparm='';
4178: if (tie(%parmhash,'GDBM_File',
4179: $ENV{'request.course.fn'}.'_parms.db',
4180: &GDBM_READER(),0640)) {
4181: $thisparm=$parmhash{$symbparm};
4182: untie(%parmhash);
4183: }
4184: if ($thisparm) { return $thisparm; }
4185: }
4186: # --------------------------------------------- last, look in resource metadata
4187:
4188: $spacequalifierrest=~s/\./\_/;
4189: my $filename;
4190: if (!$symbparm) { $symbparm=&symbread(); }
4191: if ($symbparm) {
4192: $filename=(&decode_symb($symbparm))[2];
4193: } else {
4194: $filename=$ENV{'request.filename'};
4195: }
4196: my $metadata=&metadata($filename,$spacequalifierrest);
4197: if (defined($metadata)) { return $metadata; }
4198: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
4199: if (defined($metadata)) { return $metadata; }
4200:
4201: # ------------------------------------------------------------------ Cascade up
4202: unless ($space eq '0') {
4203: my @parts=split(/_/,$space);
4204: my $id=pop(@parts);
4205: my $part=join('_',@parts);
4206: if ($part eq '') { $part='0'; }
4207: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
4208: $symbparm,$udom,$uname,$section,1);
4209: if (defined($partgeneral)) { return $partgeneral; }
4210: }
4211: if ($recurse) { return undef; }
4212: my $pack_def=&packages_tab_default($filename,$varname);
4213: if (defined($pack_def)) { return $pack_def; }
4214:
4215: # ---------------------------------------------------- Any other user namespace
4216: } elsif ($realm eq 'environment') {
4217: # ----------------------------------------------------------------- environment
4218: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
4219: return $ENV{'environment.'.$spacequalifierrest};
4220: } else {
4221: my %returnhash=&userenvironment($udom,$uname,
4222: $spacequalifierrest);
4223: return $returnhash{$spacequalifierrest};
4224: }
4225: } elsif ($realm eq 'system') {
4226: # ----------------------------------------------------------------- system.time
4227: if ($space eq 'time') {
4228: return time;
4229: }
4230: }
4231: return '';
4232: }
4233:
4234: sub packages_tab_default {
4235: my ($uri,$varname)=@_;
4236: my (undef,$part,$name)=split(/\./,$varname);
4237: my $packages=&metadata($uri,'packages');
4238: foreach my $package (split(/,/,$packages)) {
4239: my ($pack_type,$pack_part)=split(/_/,$package,2);
4240: if (defined($packagetab{"$pack_type&$name&default"})) {
4241: return $packagetab{"$pack_type&$name&default"};
4242: }
4243: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
4244: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
4245: }
4246: }
4247: return undef;
4248: }
4249:
4250: sub add_prefix_and_part {
4251: my ($prefix,$part)=@_;
4252: my $keyroot;
4253: if (defined($prefix) && $prefix !~ /^__/) {
4254: # prefix that has a part already
4255: $keyroot=$prefix;
4256: } elsif (defined($prefix)) {
4257: # prefix that is missing a part
4258: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
4259: } else {
4260: # no prefix at all
4261: if (defined($part)) { $keyroot='_'.$part; }
4262: }
4263: return $keyroot;
4264: }
4265:
4266: # ---------------------------------------------------------------- Get metadata
4267:
4268: sub metadata {
4269: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
4270: $uri=&declutter($uri);
4271: # if it is a non metadata possible uri return quickly
4272: if (($uri eq '') ||
4273: (($uri =~ m|^/*adm/|) &&
4274: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
4275: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
4276: ($uri =~ m|home/[^/]+/public_html/|)) {
4277: return undef;
4278: }
4279: my $filename=$uri;
4280: $uri=~s/\.meta$//;
4281: #
4282: # Is the metadata already cached?
4283: # Look at timestamp of caching
4284: # Everything is cached by the main uri, libraries are never directly cached
4285: #
4286: if (!defined($liburi)) {
4287: my ($result,$cached)=&is_cached(\%metacache,$uri,'meta');
4288: if (defined($cached)) { return $result->{':'.$what}; }
4289: }
4290: {
4291: #
4292: # Is this a recursive call for a library?
4293: #
4294: if (! exists($metacache{$uri})) {
4295: $metacache{$uri}={};
4296: }
4297: if ($liburi) {
4298: $liburi=&declutter($liburi);
4299: $filename=$liburi;
4300: } else {
4301: &devalidate_cache(\%metacache,$uri,'meta');
4302: }
4303: my %metathesekeys=();
4304: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
4305: my $metastring;
4306: if ($uri !~ m|^uploaded/|) {
4307: my $file=&filelocation('',&clutter($filename));
4308: push(@{$metacache{$uri.'.file'}},$file);
4309: $metastring=&getfile($file);
4310: }
4311: my $parser=HTML::LCParser->new(\$metastring);
4312: my $token;
4313: undef %metathesekeys;
4314: while ($token=$parser->get_token) {
4315: if ($token->[0] eq 'S') {
4316: if (defined($token->[2]->{'package'})) {
4317: #
4318: # This is a package - get package info
4319: #
4320: my $package=$token->[2]->{'package'};
4321: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4322: if (defined($token->[2]->{'id'})) {
4323: $keyroot.='_'.$token->[2]->{'id'};
4324: }
4325: if ($metacache{$uri}->{':packages'}) {
4326: $metacache{$uri}->{':packages'}.=','.$package.$keyroot;
4327: } else {
4328: $metacache{$uri}->{':packages'}=$package.$keyroot;
4329: }
4330: foreach (keys %packagetab) {
4331: my $part=$keyroot;
4332: $part=~s/^\_//;
4333: if ($_=~/^\Q$package\E\&/ ||
4334: $_=~/^\Q$package\E_0\&/) {
4335: my ($pack,$name,$subp)=split(/\&/,$_);
4336: # ignore package.tab specified default values
4337: # here &package_tab_default() will fetch those
4338: if ($subp eq 'default') { next; }
4339: my $value=$packagetab{$_};
4340: my $unikey;
4341: if ($pack =~ /_0$/) {
4342: $unikey='parameter_0_'.$name;
4343: $part=0;
4344: } else {
4345: $unikey='parameter'.$keyroot.'_'.$name;
4346: }
4347: if ($subp eq 'display') {
4348: $value.=' [Part: '.$part.']';
4349: }
4350: $metacache{$uri}->{':'.$unikey.'.part'}=$part;
4351: $metathesekeys{$unikey}=1;
4352: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4353: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
4354: }
4355: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4356: $metacache{$uri}->{':'.$unikey}=
4357: $metacache{$uri}->{':'.$unikey.'.default'};
4358: }
4359: }
4360: }
4361: } else {
4362: #
4363: # This is not a package - some other kind of start tag
4364: #
4365: my $entry=$token->[1];
4366: my $unikey;
4367: if ($entry eq 'import') {
4368: $unikey='';
4369: } else {
4370: $unikey=$entry;
4371: }
4372: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4373:
4374: if (defined($token->[2]->{'id'})) {
4375: $unikey.='_'.$token->[2]->{'id'};
4376: }
4377:
4378: if ($entry eq 'import') {
4379: #
4380: # Importing a library here
4381: #
4382: if ($depthcount<20) {
4383: my $location=$parser->get_text('/import');
4384: my $dir=$filename;
4385: $dir=~s|[^/]*$||;
4386: $location=&filelocation($dir,$location);
4387: foreach (sort(split(/\,/,&metadata($uri,'keys',
4388: $location,$unikey,
4389: $depthcount+1)))) {
4390: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
4391: $metathesekeys{$_}=1;
4392: }
4393: }
4394: } else {
4395:
4396: if (defined($token->[2]->{'name'})) {
4397: $unikey.='_'.$token->[2]->{'name'};
4398: }
4399: $metathesekeys{$unikey}=1;
4400: foreach (@{$token->[3]}) {
4401: $metacache{$uri}->{':'.$unikey.'.'.$_}=$token->[2]->{$_};
4402: }
4403: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
4404: my $default=$metacache{$uri}->{':'.$unikey.'.default'};
4405: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
4406: # only ws inside the tag, and not in default, so use default
4407: # as value
4408: $metacache{$uri}->{':'.$unikey}=$default;
4409: } else {
4410: # either something interesting inside the tag or default
4411: # uninteresting
4412: $metacache{$uri}->{':'.$unikey}=$internaltext;
4413: }
4414: # end of not-a-package not-a-library import
4415: }
4416: # end of not-a-package start tag
4417: }
4418: # the next is the end of "start tag"
4419: }
4420: }
4421: my ($extension) = ($uri =~ /\.(\w+)$/);
4422: foreach my $key (sort(keys(%packagetab))) {
4423: #&logthis("extsion1 $extension $key !!");
4424: #no specific packages #how's our extension
4425: if ($key!~/^extension_\Q$extension\E&/) { next; }
4426: &metadata_create_package_def($uri,$key,'extension_'.$extension,
4427: \%metathesekeys);
4428: }
4429: if (!exists($metacache{$uri}->{':packages'})) {
4430: foreach my $key (sort(keys(%packagetab))) {
4431: #no specific packages well let's get default then
4432: if ($key!~/^default&/) { next; }
4433: &metadata_create_package_def($uri,$key,'default',
4434: \%metathesekeys);
4435: }
4436: }
4437: # are there custom rights to evaluate
4438: if ($metacache{$uri}->{':copyright'} eq 'custom') {
4439:
4440: #
4441: # Importing a rights file here
4442: #
4443: unless ($depthcount) {
4444: my $location=$metacache{$uri}->{':customdistributionfile'};
4445: my $dir=$filename;
4446: $dir=~s|[^/]*$||;
4447: $location=&filelocation($dir,$location);
4448: foreach (sort(split(/\,/,&metadata($uri,'keys',
4449: $location,'_rights',
4450: $depthcount+1)))) {
4451: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
4452: $metathesekeys{$_}=1;
4453: }
4454: }
4455: }
4456: $metacache{$uri}->{':keys'}=join(',',keys %metathesekeys);
4457: &metadata_generate_part0(\%metathesekeys,$metacache{$uri},$uri);
4458: $metacache{$uri}->{':allpossiblekeys'}=join(',',keys %metathesekeys);
4459: &do_cache(\%metacache,$uri,$metacache{$uri},'meta');
4460: # this is the end of "was not already recently cached
4461: }
4462: return $metacache{$uri}->{':'.$what};
4463: }
4464:
4465: sub metadata_create_package_def {
4466: my ($uri,$key,$package,$metathesekeys)=@_;
4467: my ($pack,$name,$subp)=split(/\&/,$key);
4468: if ($subp eq 'default') { next; }
4469:
4470: if (defined($metacache{$uri}->{':packages'})) {
4471: $metacache{$uri}->{':packages'}.=','.$package;
4472: } else {
4473: $metacache{$uri}->{':packages'}=$package;
4474: }
4475: my $value=$packagetab{$key};
4476: my $unikey;
4477: $unikey='parameter_0_'.$name;
4478: $metacache{$uri}->{':'.$unikey.'.part'}=0;
4479: $$metathesekeys{$unikey}=1;
4480: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4481: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
4482: }
4483: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4484: $metacache{$uri}->{':'.$unikey}=
4485: $metacache{$uri}->{':'.$unikey.'.default'};
4486: }
4487: }
4488:
4489: sub metadata_generate_part0 {
4490: my ($metadata,$metacache,$uri) = @_;
4491: my %allnames;
4492: foreach my $metakey (sort keys %$metadata) {
4493: if ($metakey=~/^parameter\_(.*)/) {
4494: my $part=$$metacache{':'.$metakey.'.part'};
4495: my $name=$$metacache{':'.$metakey.'.name'};
4496: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
4497: $allnames{$name}=$part;
4498: }
4499: }
4500: }
4501: foreach my $name (keys(%allnames)) {
4502: $$metadata{"parameter_0_$name"}=1;
4503: my $key=":parameter_0_$name";
4504: $$metacache{"$key.part"}='0';
4505: $$metacache{"$key.name"}=$name;
4506: $$metacache{"$key.type"}=$$metacache{':parameter_'.
4507: $allnames{$name}.'_'.$name.
4508: '.type'};
4509: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
4510: '.display'};
4511: my $expr='\\[Part: '.$allnames{$name}.'\\]';
4512: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
4513: $$metacache{"$key.display"}=$olddis;
4514: }
4515: }
4516:
4517: # ------------------------------------------------- Get the title of a resource
4518:
4519: sub gettitle {
4520: my $urlsymb=shift;
4521: my $symb=&symbread($urlsymb);
4522: if ($symb) {
4523: my ($result,$cached)=&is_cached(\%titlecache,$symb,'title',600);
4524: if (defined($cached)) { return $result; }
4525: my ($map,$resid,$url)=&decode_symb($symb);
4526: my $title='';
4527: my %bighash;
4528: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4529: &GDBM_READER(),0640)) {
4530: my $mapid=$bighash{'map_pc_'.&clutter($map)};
4531: $title=$bighash{'title_'.$mapid.'.'.$resid};
4532: untie %bighash;
4533: }
4534: $title=~s/\&colon\;/\:/gs;
4535: if ($title) {
4536: return &do_cache(\%titlecache,$symb,$title,'title');
4537: }
4538: $urlsymb=$url;
4539: }
4540: my $title=&metadata($urlsymb,'title');
4541: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
4542: return $title;
4543: }
4544:
4545: # ------------------------------------------------- Update symbolic store links
4546:
4547: sub symblist {
4548: my ($mapname,%newhash)=@_;
4549: $mapname=&deversion(&declutter($mapname));
4550: my %hash;
4551: if (($ENV{'request.course.fn'}) && (%newhash)) {
4552: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4553: &GDBM_WRCREAT(),0640)) {
4554: foreach (keys %newhash) {
4555: $hash{declutter($_)}=$mapname.'___'.&deversion($newhash{$_});
4556: }
4557: if (untie(%hash)) {
4558: return 'ok';
4559: }
4560: }
4561: }
4562: return 'error';
4563: }
4564:
4565: # --------------------------------------------------------------- Verify a symb
4566:
4567: sub symbverify {
4568: my ($symb,$thisurl)=@_;
4569: my $thisfn=$thisurl;
4570: # wrapper not part of symbs
4571: $thisfn=~s/^\/adm\/wrapper//;
4572: $thisfn=&declutter($thisfn);
4573: # direct jump to resource in page or to a sequence - will construct own symbs
4574: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
4575: # check URL part
4576: my ($map,$resid,$url)=&decode_symb($symb);
4577:
4578: unless ($url eq $thisfn) { return 0; }
4579:
4580: $symb=&symbclean($symb);
4581: $thisurl=&deversion($thisurl);
4582: $thisfn=&deversion($thisfn);
4583:
4584: my %bighash;
4585: my $okay=0;
4586:
4587: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4588: &GDBM_READER(),0640)) {
4589: my $ids=$bighash{'ids_'.&clutter($thisurl)};
4590: unless ($ids) {
4591: $ids=$bighash{'ids_/'.$thisurl};
4592: }
4593: if ($ids) {
4594: # ------------------------------------------------------------------- Has ID(s)
4595: foreach (split(/\,/,$ids)) {
4596: my ($mapid,$resid)=split(/\./,$_);
4597: if (
4598: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
4599: eq $symb) {
4600: $okay=1;
4601: }
4602: }
4603: }
4604: untie(%bighash);
4605: }
4606: return $okay;
4607: }
4608:
4609: # --------------------------------------------------------------- Clean-up symb
4610:
4611: sub symbclean {
4612: my $symb=shift;
4613:
4614: # remove version from map
4615: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
4616:
4617: # remove version from URL
4618: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
4619:
4620: # remove wrapper
4621:
4622: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
4623: return $symb;
4624: }
4625:
4626: # ---------------------------------------------- Split symb to find map and url
4627:
4628: sub encode_symb {
4629: my ($map,$resid,$url)=@_;
4630: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
4631: }
4632:
4633: sub decode_symb {
4634: my ($map,$resid,$url)=split(/\_\_\_/,shift);
4635: return (&fixversion($map),$resid,&fixversion($url));
4636: }
4637:
4638: sub fixversion {
4639: my $fn=shift;
4640: if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
4641: my %bighash;
4642: my $uri=&clutter($fn);
4643: my $key=$ENV{'request.course.id'}.'_'.$uri;
4644: # is this cached?
4645: my ($result,$cached)=&is_cached(\%courseresversioncache,$key,
4646: 'courseresversion',600);
4647: if (defined($cached)) { return $result; }
4648: # unfortunately not cached, or expired
4649: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4650: &GDBM_READER(),0640)) {
4651: if ($bighash{'version_'.$uri}) {
4652: my $version=$bighash{'version_'.$uri};
4653: unless (($version eq 'mostrecent') ||
4654: ($version==&getversion($uri))) {
4655: $uri=~s/\.(\w+)$/\.$version\.$1/;
4656: }
4657: }
4658: untie %bighash;
4659: }
4660: return &do_cache
4661: (\%courseresversioncache,$key,&declutter($uri),'courseresversion');
4662: }
4663:
4664: sub deversion {
4665: my $url=shift;
4666: $url=~s/\.\d+\.(\w+)$/\.$1/;
4667: return $url;
4668: }
4669:
4670: # ------------------------------------------------------ Return symb list entry
4671:
4672: sub symbread {
4673: my ($thisfn,$donotrecurse)=@_;
4674: my $cache_str='request.symbread.cached.'.$thisfn;
4675: if (defined($ENV{$cache_str})) { return $ENV{$cache_str}; }
4676: # no filename provided? try from environment
4677: unless ($thisfn) {
4678: if ($ENV{'request.symb'}) {
4679: return $ENV{$cache_str}=&symbclean($ENV{'request.symb'});
4680: }
4681: $thisfn=$ENV{'request.filename'};
4682: }
4683: # is that filename actually a symb? Verify, clean, and return
4684: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
4685: if (&symbverify($thisfn,$1)) {
4686: return $ENV{$cache_str}=&symbclean($thisfn);
4687: }
4688: }
4689: $thisfn=declutter($thisfn);
4690: my %hash;
4691: my %bighash;
4692: my $syval='';
4693: if (($ENV{'request.course.fn'}) && ($thisfn)) {
4694: my $targetfn = $thisfn;
4695: if ( ($thisfn =~ m/^uploaded\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
4696: $targetfn = 'adm/wrapper/'.$thisfn;
4697: }
4698: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4699: &GDBM_READER(),0640)) {
4700: $syval=$hash{$targetfn};
4701: untie(%hash);
4702: }
4703: # ---------------------------------------------------------- There was an entry
4704: if ($syval) {
4705: unless ($syval=~/\_\d+$/) {
4706: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
4707: &appenv('request.ambiguous' => $thisfn);
4708: return $ENV{$cache_str}='';
4709: }
4710: $syval.=$1;
4711: }
4712: } else {
4713: # ------------------------------------------------------- Was not in symb table
4714: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4715: &GDBM_READER(),0640)) {
4716: # ---------------------------------------------- Get ID(s) for current resource
4717: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4718: unless ($ids) {
4719: $ids=$bighash{'ids_/'.$thisfn};
4720: }
4721: unless ($ids) {
4722: # alias?
4723: $ids=$bighash{'mapalias_'.$thisfn};
4724: }
4725: if ($ids) {
4726: # ------------------------------------------------------------------- Has ID(s)
4727: my @possibilities=split(/\,/,$ids);
4728: if ($#possibilities==0) {
4729: # ----------------------------------------------- There is only one possibility
4730: my ($mapid,$resid)=split(/\./,$ids);
4731: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
4732: } elsif (!$donotrecurse) {
4733: # ------------------------------------------ There is more than one possibility
4734: my $realpossible=0;
4735: foreach (@possibilities) {
4736: my $file=$bighash{'src_'.$_};
4737: if (&allowed('bre',$file)) {
4738: my ($mapid,$resid)=split(/\./,$_);
4739: if ($bighash{'map_type_'.$mapid} ne 'page') {
4740: $realpossible++;
4741: $syval=declutter($bighash{'map_id_'.$mapid}).
4742: '___'.$resid;
4743: }
4744: }
4745: }
4746: if ($realpossible!=1) { $syval=''; }
4747: } else {
4748: $syval='';
4749: }
4750: }
4751: untie(%bighash)
4752: }
4753: }
4754: if ($syval) {
4755: return $ENV{$cache_str}=&symbclean($syval.'___'.$thisfn);
4756: }
4757: }
4758: &appenv('request.ambiguous' => $thisfn);
4759: return $ENV{$cache_str}='';
4760: }
4761:
4762: # ---------------------------------------------------------- Return random seed
4763:
4764: sub numval {
4765: my $txt=shift;
4766: $txt=~tr/A-J/0-9/;
4767: $txt=~tr/a-j/0-9/;
4768: $txt=~tr/K-T/0-9/;
4769: $txt=~tr/k-t/0-9/;
4770: $txt=~tr/U-Z/0-5/;
4771: $txt=~tr/u-z/0-5/;
4772: $txt=~s/\D//g;
4773: return int($txt);
4774: }
4775:
4776: sub numval2 {
4777: my $txt=shift;
4778: $txt=~tr/A-J/0-9/;
4779: $txt=~tr/a-j/0-9/;
4780: $txt=~tr/K-T/0-9/;
4781: $txt=~tr/k-t/0-9/;
4782: $txt=~tr/U-Z/0-5/;
4783: $txt=~tr/u-z/0-5/;
4784: $txt=~s/\D//g;
4785: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
4786: my $total;
4787: foreach my $val (@txts) { $total+=$val; }
4788: return int($total);
4789: }
4790:
4791: sub latest_rnd_algorithm_id {
4792: return '64bit3';
4793: }
4794:
4795: sub get_rand_alg {
4796: my ($courseid)=@_;
4797: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
4798: if ($courseid) {
4799: return $ENV{"course.$courseid.rndseed"};
4800: }
4801: return &latest_rnd_algorithm_id();
4802: }
4803:
4804: sub getCODE {
4805: if (defined($ENV{'form.CODE'})) { return $ENV{'form.CODE'}; }
4806: if (defined($Apache::lonhomework::parsing_a_problem) &&
4807: defined($Apache::lonhomework::history{'resource.CODE'})) {
4808: return $Apache::lonhomework::history{'resource.CODE'};
4809: }
4810: return undef;
4811: }
4812:
4813: sub rndseed {
4814: my ($symb,$courseid,$domain,$username)=@_;
4815:
4816: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
4817: if (!$symb) {
4818: unless ($symb=$wsymb) { return time; }
4819: }
4820: if (!$courseid) { $courseid=$wcourseid; }
4821: if (!$domain) { $domain=$wdomain; }
4822: if (!$username) { $username=$wusername }
4823: my $which=&get_rand_alg();
4824: if (defined(&getCODE())) {
4825: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
4826: } elsif ($which eq '64bit3') {
4827: return &rndseed_64bit3($symb,$courseid,$domain,$username);
4828: } elsif ($which eq '64bit2') {
4829: return &rndseed_64bit2($symb,$courseid,$domain,$username);
4830: } elsif ($which eq '64bit') {
4831: return &rndseed_64bit($symb,$courseid,$domain,$username);
4832: }
4833: return &rndseed_32bit($symb,$courseid,$domain,$username);
4834: }
4835:
4836: sub rndseed_32bit {
4837: my ($symb,$courseid,$domain,$username)=@_;
4838: {
4839: use integer;
4840: my $symbchck=unpack("%32C*",$symb) << 27;
4841: my $symbseed=numval($symb) << 22;
4842: my $namechck=unpack("%32C*",$username) << 17;
4843: my $nameseed=numval($username) << 12;
4844: my $domainseed=unpack("%32C*",$domain) << 7;
4845: my $courseseed=unpack("%32C*",$courseid);
4846: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
4847: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4848: #&Apache::lonxml::debug("rndseed :$num:$symb");
4849: return $num;
4850: }
4851: }
4852:
4853: sub rndseed_64bit {
4854: my ($symb,$courseid,$domain,$username)=@_;
4855: {
4856: use integer;
4857: my $symbchck=unpack("%32S*",$symb) << 21;
4858: my $symbseed=numval($symb) << 10;
4859: my $namechck=unpack("%32S*",$username);
4860:
4861: my $nameseed=numval($username) << 21;
4862: my $domainseed=unpack("%32S*",$domain) << 10;
4863: my $courseseed=unpack("%32S*",$courseid);
4864:
4865: my $num1=$symbchck+$symbseed+$namechck;
4866: my $num2=$nameseed+$domainseed+$courseseed;
4867: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4868: #&Apache::lonxml::debug("rndseed :$num:$symb");
4869: return "$num1,$num2";
4870: }
4871: }
4872:
4873: sub rndseed_64bit2 {
4874: my ($symb,$courseid,$domain,$username)=@_;
4875: {
4876: use integer;
4877: # strings need to be an even # of cahracters long, it it is odd the
4878: # last characters gets thrown away
4879: my $symbchck=unpack("%32S*",$symb.' ') << 21;
4880: my $symbseed=numval($symb) << 10;
4881: my $namechck=unpack("%32S*",$username.' ');
4882:
4883: my $nameseed=numval($username) << 21;
4884: my $domainseed=unpack("%32S*",$domain.' ') << 10;
4885: my $courseseed=unpack("%32S*",$courseid.' ');
4886:
4887: my $num1=$symbchck+$symbseed+$namechck;
4888: my $num2=$nameseed+$domainseed+$courseseed;
4889: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4890: #&Apache::lonxml::debug("rndseed :$num:$symb");
4891: return "$num1,$num2";
4892: }
4893: }
4894:
4895: sub rndseed_64bit3 {
4896: my ($symb,$courseid,$domain,$username)=@_;
4897: {
4898: use integer;
4899: # strings need to be an even # of cahracters long, it it is odd the
4900: # last characters gets thrown away
4901: my $symbchck=unpack("%32S*",$symb.' ') << 21;
4902: my $symbseed=numval2($symb) << 10;
4903: my $namechck=unpack("%32S*",$username.' ');
4904:
4905: my $nameseed=numval2($username) << 21;
4906: my $domainseed=unpack("%32S*",$domain.' ') << 10;
4907: my $courseseed=unpack("%32S*",$courseid.' ');
4908:
4909: my $num1=$symbchck+$symbseed+$namechck;
4910: my $num2=$nameseed+$domainseed+$courseseed;
4911: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4912: #&Apache::lonxml::debug("rndseed :$num:$symb");
4913: return "$num1:$num2";
4914: }
4915: }
4916:
4917: sub rndseed_CODE_64bit {
4918: my ($symb,$courseid,$domain,$username)=@_;
4919: {
4920: use integer;
4921: my $symbchck=unpack("%32S*",$symb.' ') << 16;
4922: my $symbseed=numval2($symb);
4923: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
4924: my $CODEseed=numval(&getCODE());
4925: my $courseseed=unpack("%32S*",$courseid.' ');
4926: my $num1=$symbseed+$CODEchck;
4927: my $num2=$CODEseed+$courseseed+$symbchck;
4928: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
4929: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
4930: return "$num1:$num2";
4931: }
4932: }
4933:
4934: sub setup_random_from_rndseed {
4935: my ($rndseed)=@_;
4936: if ($rndseed =~/([,:])/) {
4937: my ($num1,$num2)=split(/[,:]/,$rndseed);
4938: &Math::Random::random_set_seed(abs($num1),abs($num2));
4939: } else {
4940: &Math::Random::random_set_seed_from_phrase($rndseed);
4941: }
4942: }
4943:
4944: sub latest_receipt_algorithm_id {
4945: return 'receipt2';
4946: }
4947:
4948: sub recunique {
4949: my $fucourseid=shift;
4950: my $unique;
4951: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
4952: $unique=$ENV{"course.$fucourseid.internal.encseed"};
4953: } else {
4954: $unique=$perlvar{'lonReceipt'};
4955: }
4956: return unpack("%32C*",$unique);
4957: }
4958:
4959: sub recprefix {
4960: my $fucourseid=shift;
4961: my $prefix;
4962: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
4963: $prefix=$ENV{"course.$fucourseid.internal.encpref"};
4964: } else {
4965: $prefix=$perlvar{'lonHostID'};
4966: }
4967: return unpack("%32C*",$prefix);
4968: }
4969:
4970: sub ireceipt {
4971: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
4972: my $cuname=unpack("%32C*",$funame);
4973: my $cudom=unpack("%32C*",$fudom);
4974: my $cucourseid=unpack("%32C*",$fucourseid);
4975: my $cusymb=unpack("%32C*",$fusymb);
4976: my $cunique=&recunique($fucourseid);
4977: my $cpart=unpack("%32S*",$part);
4978: my $return =&recprefix($fucourseid).'-';
4979: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
4980: $ENV{'request.state'} eq 'construct') {
4981: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
4982: " and ".($cpart%$cudom));
4983:
4984: $return.= ($cunique%$cuname+
4985: $cunique%$cudom+
4986: $cusymb%$cuname+
4987: $cusymb%$cudom+
4988: $cucourseid%$cuname+
4989: $cucourseid%$cudom+
4990: $cpart%$cuname+
4991: $cpart%$cudom);
4992: } else {
4993: $return.= ($cunique%$cuname+
4994: $cunique%$cudom+
4995: $cusymb%$cuname+
4996: $cusymb%$cudom+
4997: $cucourseid%$cuname+
4998: $cucourseid%$cudom);
4999: }
5000: return $return;
5001: }
5002:
5003: sub receipt {
5004: my ($part)=@_;
5005: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
5006: return &ireceipt($name,$domain,$courseid,$symb,$part);
5007: }
5008:
5009: # ------------------------------------------------------------ Serves up a file
5010: # returns either the contents of the file or
5011: # -1 if the file doesn't exist
5012: #
5013: # if the target is a file that was uploaded via DOCS,
5014: # a check will be made to see if a current copy exists on the local server,
5015: # if it does this will be served, otherwise a copy will be retrieved from
5016: # the home server for the course and stored in /home/httpd/html/userfiles on
5017: # the local server.
5018:
5019: sub getfile {
5020: my ($file) = @_;
5021:
5022: if ($file =~ m|^/*uploaded/|) { $file=&filelocation("",$file); }
5023: &repcopy($file);
5024: return &readfile($file);
5025: }
5026:
5027: sub repcopy_userfile {
5028: my ($file)=@_;
5029:
5030: if ($file =~ m|^/*uploaded/|) { $file=&filelocation("",$file); }
5031: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return OK; }
5032:
5033: my ($cdom,$cnum,$filename) =
5034: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
5035: my ($info,$rtncode);
5036: my $uri="/uploaded/$cdom/$cnum/$filename";
5037: if (-e "$file") {
5038: my @fileinfo = stat($file);
5039: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
5040: if ($lwpresp ne 'ok') {
5041: if ($rtncode eq '404') {
5042: unlink($file);
5043: }
5044: #my $ua=new LWP::UserAgent;
5045: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5046: #my $response=$ua->request($request);
5047: #if ($response->is_success()) {
5048: # return $response->content;
5049: # } else {
5050: # return -1;
5051: # }
5052: return -1;
5053: }
5054: if ($info < $fileinfo[9]) {
5055: return OK;
5056: }
5057: $info = '';
5058: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5059: if ($lwpresp ne 'ok') {
5060: return -1;
5061: }
5062: } else {
5063: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5064: if ($lwpresp ne 'ok') {
5065: my $ua=new LWP::UserAgent;
5066: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5067: my $response=$ua->request($request);
5068: if ($response->is_success()) {
5069: $info=$response->content;
5070: } else {
5071: return -1;
5072: }
5073: }
5074: my @parts = ($cdom,$cnum);
5075: if ($filename =~ m|^(.+)/[^/]+$|) {
5076: push @parts, split(/\//,$1);
5077: }
5078: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
5079: foreach my $part (@parts) {
5080: $path .= '/'.$part;
5081: if (!-e $path) {
5082: mkdir($path,0770);
5083: }
5084: }
5085: }
5086: open(FILE,">$file");
5087: print FILE $info;
5088: close(FILE);
5089: return OK;
5090: }
5091:
5092: sub tokenwrapper {
5093: my $uri=shift;
5094: $uri=~s/^http\:\/\/([^\/]+)//;
5095: $uri=~s/^\///;
5096: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
5097: my $token=$1;
5098: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
5099: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
5100: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
5101: (($uri=~/\?/)?'&':'?').'token='.$token.
5102: '&tokenissued='.$perlvar{'lonHostID'};
5103: } else {
5104: return '/adm/notfound.html';
5105: }
5106: }
5107:
5108: sub getuploaded {
5109: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
5110: $uri=~s/^\///;
5111: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
5112: my $ua=new LWP::UserAgent;
5113: my $request=new HTTP::Request($reqtype,$uri);
5114: my $response=$ua->request($request);
5115: $$rtncode = $response->code;
5116: if (! $response->is_success()) {
5117: return 'failed';
5118: }
5119: if ($reqtype eq 'HEAD') {
5120: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
5121: } elsif ($reqtype eq 'GET') {
5122: $$info = $response->content;
5123: }
5124: return 'ok';
5125: }
5126:
5127: sub readfile {
5128: my $file = shift;
5129: if ( (! -e $file ) || ($file eq '') ) { return -1; };
5130: my $fh;
5131: open($fh,"<$file");
5132: my $a='';
5133: while (<$fh>) { $a .=$_; }
5134: return $a;
5135: }
5136:
5137: sub filelocation {
5138: my ($dir,$file) = @_;
5139: my $location;
5140: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
5141: if ($file=~m:^/~:) { # is a contruction space reference
5142: $location = $file;
5143: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
5144: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
5145: my ($udom,$uname,$filename)=
5146: ($file=~m|^/+uploaded/+([^/]+)/+([^/]+)/+(.*)$|);
5147: my $home=&homeserver($uname,$udom);
5148: my $is_me=0;
5149: my @ids=¤t_machine_ids();
5150: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
5151: if ($is_me) {
5152: $location=&Apache::loncommon::propath($udom,$uname).
5153: '/userfiles/'.$filename;
5154: } else {
5155: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
5156: $udom.'/'.$uname.'/'.$filename;
5157: }
5158: } else {
5159: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5160: $file=~s:^/res/:/:;
5161: if ( !( $file =~ m:^/:) ) {
5162: $location = $dir. '/'.$file;
5163: } else {
5164: $location = '/home/httpd/html/res'.$file;
5165: }
5166: }
5167: $location=~s://+:/:g; # remove duplicate /
5168: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
5169: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
5170: return $location;
5171: }
5172:
5173: sub hreflocation {
5174: my ($dir,$file)=@_;
5175: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
5176: my $finalpath=filelocation($dir,$file);
5177: $finalpath=~s-^/home/httpd/html--;
5178: $finalpath=~s-^/home/(\w+)/public_html/-/~$1/-;
5179: return $finalpath;
5180: } elsif ($file=~m-^/home-) {
5181: $file=~s-^/home/httpd/html--;
5182: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
5183: return $file;
5184: }
5185: return $file;
5186: }
5187:
5188: sub current_machine_domains {
5189: my $hostname=$hostname{$perlvar{'lonHostID'}};
5190: my @domains;
5191: while( my($id, $name) = each(%hostname)) {
5192: # &logthis("-$id-$name-$hostname-");
5193: if ($hostname eq $name) {
5194: push(@domains,$hostdom{$id});
5195: }
5196: }
5197: return @domains;
5198: }
5199:
5200: sub current_machine_ids {
5201: my $hostname=$hostname{$perlvar{'lonHostID'}};
5202: my @ids;
5203: while( my($id, $name) = each(%hostname)) {
5204: # &logthis("-$id-$name-$hostname-");
5205: if ($hostname eq $name) {
5206: push(@ids,$id);
5207: }
5208: }
5209: return @ids;
5210: }
5211:
5212: # ------------------------------------------------------------- Declutters URLs
5213:
5214: sub declutter {
5215: my $thisfn=shift;
5216: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5217: $thisfn=~s/^\///;
5218: $thisfn=~s/^res\///;
5219: $thisfn=~s/\?.+$//;
5220: return $thisfn;
5221: }
5222:
5223: # ------------------------------------------------------------- Clutter up URLs
5224:
5225: sub clutter {
5226: my $thisfn='/'.&declutter(shift);
5227: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv|public)\//) {
5228: $thisfn='/res'.$thisfn;
5229: }
5230: return $thisfn;
5231: }
5232:
5233: # -------------------------------------------------------- Escape Special Chars
5234:
5235: sub escape {
5236: my $str=shift;
5237: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
5238: return $str;
5239: }
5240:
5241: # ----------------------------------------------------- Un-Escape Special Chars
5242:
5243: sub unescape {
5244: my $str=shift;
5245: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
5246: return $str;
5247: }
5248:
5249: sub mod_perl_version {
5250: if (defined($perlvar{'MODPERL2'})) {
5251: return 2;
5252: }
5253: return 1;
5254: }
5255:
5256: sub correct_line_ends {
5257: my ($result)=@_;
5258: $$result =~s/\r\n/\n/mg;
5259: $$result =~s/\r/\n/mg;
5260: }
5261: # ================================================================ Main Program
5262:
5263: sub goodbye {
5264: &logthis("Starting Shut down");
5265: #not converted to using infrastruture and probably shouldn't be
5266: &logthis(sprintf("%-20s is %s",'%badServerCache',scalar(%badServerCache)));
5267: #converted
5268: &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
5269: &logthis(sprintf("%-20s is %s",'%homecache',scalar(%homecache)));
5270: &logthis(sprintf("%-20s is %s",'%titlecache',scalar(%titlecache)));
5271: &logthis(sprintf("%-20s is %s",'%courseresdatacache',scalar(%courseresdatacache)));
5272: #1.1 only
5273: &logthis(sprintf("%-20s is %s",'%userresdatacache',scalar(%userresdatacache)));
5274: &logthis(sprintf("%-20s is %s",'%usectioncache',scalar(%usectioncache)));
5275: &logthis(sprintf("%-20s is %s",'%courseresversioncache',scalar(%courseresversioncache)));
5276: &logthis(sprintf("%-20s is %s",'%resversioncache',scalar(%resversioncache)));
5277: &flushcourselogs();
5278: &logthis("Shutting down");
5279: return DONE;
5280: }
5281:
5282: BEGIN {
5283: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
5284: unless ($readit) {
5285: {
5286: open(my $config,"</etc/httpd/conf/loncapa.conf");
5287:
5288: while (my $configline=<$config>) {
5289: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
5290: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5291: chomp($varvalue);
5292: $perlvar{$varname}=$varvalue;
5293: }
5294: }
5295: close($config);
5296: }
5297: {
5298: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
5299:
5300: while (my $configline=<$config>) {
5301: if ($configline =~ /^[^\#]*PerlSetVar/) {
5302: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5303: chomp($varvalue);
5304: $perlvar{$varname}=$varvalue;
5305: }
5306: }
5307: close($config);
5308: }
5309:
5310: # ------------------------------------------------------------ Read domain file
5311: {
5312: %domaindescription = ();
5313: %domain_auth_def = ();
5314: %domain_auth_arg_def = ();
5315: my $fh;
5316: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
5317: while (<$fh>) {
5318: next if (/^(\#|\s*$)/);
5319: # next if /^\#/;
5320: chomp;
5321: my ($domain, $domain_description, $def_auth, $def_auth_arg,
5322: $def_lang, $city, $longi, $lati) = split(/:/,$_);
5323: $domain_auth_def{$domain}=$def_auth;
5324: $domain_auth_arg_def{$domain}=$def_auth_arg;
5325: $domaindescription{$domain}=$domain_description;
5326: $domain_lang_def{$domain}=$def_lang;
5327: $domain_city{$domain}=$city;
5328: $domain_longi{$domain}=$longi;
5329: $domain_lati{$domain}=$lati;
5330:
5331: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
5332: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
5333: }
5334: }
5335: close ($fh);
5336: }
5337:
5338:
5339: # ------------------------------------------------------------- Read hosts file
5340: {
5341: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
5342:
5343: while (my $configline=<$config>) {
5344: next if ($configline =~ /^(\#|\s*$)/);
5345: chomp($configline);
5346: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
5347: if ($id && $domain && $role && $name && $ip) {
5348: $hostname{$id}=$name;
5349: $hostdom{$id}=$domain;
5350: $hostip{$id}=$ip;
5351: $iphost{$ip}=$id;
5352: if ($role eq 'library') { $libserv{$id}=$name; }
5353: }
5354: }
5355: close($config);
5356: }
5357:
5358: # ------------------------------------------------------ Read spare server file
5359: {
5360: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
5361:
5362: while (my $configline=<$config>) {
5363: chomp($configline);
5364: if ($configline) {
5365: $spareid{$configline}=1;
5366: }
5367: }
5368: close($config);
5369: }
5370: # ------------------------------------------------------------ Read permissions
5371: {
5372: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
5373:
5374: while (my $configline=<$config>) {
5375: chomp($configline);
5376: if ($configline) {
5377: my ($role,$perm)=split(/ /,$configline);
5378: if ($perm ne '') { $pr{$role}=$perm; }
5379: }
5380: }
5381: close($config);
5382: }
5383:
5384: # -------------------------------------------- Read plain texts for permissions
5385: {
5386: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
5387:
5388: while (my $configline=<$config>) {
5389: chomp($configline);
5390: if ($configline) {
5391: my ($short,$plain)=split(/:/,$configline);
5392: if ($plain ne '') { $prp{$short}=$plain; }
5393: }
5394: }
5395: close($config);
5396: }
5397:
5398: # ---------------------------------------------------------- Read package table
5399: {
5400: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
5401:
5402: while (my $configline=<$config>) {
5403: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
5404: chomp($configline);
5405: my ($short,$plain)=split(/:/,$configline);
5406: my ($pack,$name)=split(/\&/,$short);
5407: if ($plain ne '') {
5408: $packagetab{$pack.'&'.$name.'&name'}=$name;
5409: $packagetab{$short}=$plain;
5410: }
5411: }
5412: close($config);
5413: }
5414:
5415: # ------------- set up temporary directory
5416: {
5417: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
5418:
5419: }
5420:
5421: %metacache=();
5422:
5423: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
5424: $dumpcount=0;
5425:
5426: &logtouch();
5427: &logthis('<font color=yellow>INFO: Read configuration</font>');
5428: $readit=1;
5429: }
5430: }
5431:
5432: 1;
5433: __END__
5434:
5435: =pod
5436:
5437: =head1 NAME
5438:
5439: Apache::lonnet - Subroutines to ask questions about things in the network.
5440:
5441: =head1 SYNOPSIS
5442:
5443: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
5444:
5445: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
5446:
5447: Common parameters:
5448:
5449: =over 4
5450:
5451: =item *
5452:
5453: $uname : an internal username (if $cname expecting a course Id specifically)
5454:
5455: =item *
5456:
5457: $udom : a domain (if $cdom expecting a course's domain specifically)
5458:
5459: =item *
5460:
5461: $symb : a resource instance identifier
5462:
5463: =item *
5464:
5465: $namespace : the name of a .db file that contains the data needed or
5466: being set.
5467:
5468: =back
5469:
5470: =head1 OVERVIEW
5471:
5472: lonnet provides subroutines which interact with the
5473: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
5474: about classes, users, and resources.
5475:
5476: For many of these objects you can also use this to store data about
5477: them or modify them in various ways.
5478:
5479: =head2 Symbs
5480:
5481: To identify a specific instance of a resource, LON-CAPA uses symbols
5482: or "symbs"X<symb>. These identifiers are built from the URL of the
5483: map, the resource number of the resource in the map, and the URL of
5484: the resource itself. The latter is somewhat redundant, but might help
5485: if maps change.
5486:
5487: An example is
5488:
5489: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
5490:
5491: The respective map entry is
5492:
5493: <resource id="19" src="/res/msu/korte/tests/part12.problem"
5494: title="Problem 2">
5495: </resource>
5496:
5497: Symbs are used by the random number generator, as well as to store and
5498: restore data specific to a certain instance of for example a problem.
5499:
5500: =head2 Storing And Retrieving Data
5501:
5502: X<store()>X<cstore()>X<restore()>Three of the most important functions
5503: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
5504: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
5505: is is the non-critical message twin of cstore. These functions are for
5506: handlers to store a perl hash to a user's permanent data space in an
5507: easy manner, and to retrieve it again on another call. It is expected
5508: that a handler would use this once at the beginning to retrieve data,
5509: and then again once at the end to send only the new data back.
5510:
5511: The data is stored in the user's data directory on the user's
5512: homeserver under the ID of the course.
5513:
5514: The hash that is returned by restore will have all of the previous
5515: value for all of the elements of the hash.
5516:
5517: Example:
5518:
5519: #creating a hash
5520: my %hash;
5521: $hash{'foo'}='bar';
5522:
5523: #storing it
5524: &Apache::lonnet::cstore(\%hash);
5525:
5526: #changing a value
5527: $hash{'foo'}='notbar';
5528:
5529: #adding a new value
5530: $hash{'bar'}='foo';
5531: &Apache::lonnet::cstore(\%hash);
5532:
5533: #retrieving the hash
5534: my %history=&Apache::lonnet::restore();
5535:
5536: #print the hash
5537: foreach my $key (sort(keys(%history))) {
5538: print("\%history{$key} = $history{$key}");
5539: }
5540:
5541: Will print out:
5542:
5543: %history{1:foo} = bar
5544: %history{1:keys} = foo:timestamp
5545: %history{1:timestamp} = 990455579
5546: %history{2:bar} = foo
5547: %history{2:foo} = notbar
5548: %history{2:keys} = foo:bar:timestamp
5549: %history{2:timestamp} = 990455580
5550: %history{bar} = foo
5551: %history{foo} = notbar
5552: %history{timestamp} = 990455580
5553: %history{version} = 2
5554:
5555: Note that the special hash entries C<keys>, C<version> and
5556: C<timestamp> were added to the hash. C<version> will be equal to the
5557: total number of versions of the data that have been stored. The
5558: C<timestamp> attribute will be the UNIX time the hash was
5559: stored. C<keys> is available in every historical section to list which
5560: keys were added or changed at a specific historical revision of a
5561: hash.
5562:
5563: B<Warning>: do not store the hash that restore returns directly. This
5564: will cause a mess since it will restore the historical keys as if the
5565: were new keys. I.E. 1:foo will become 1:1:foo etc.
5566:
5567: Calling convention:
5568:
5569: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
5570: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
5571:
5572: For more detailed information, see lonnet specific documentation.
5573:
5574: =head1 RETURN MESSAGES
5575:
5576: =over 4
5577:
5578: =item * B<con_lost>: unable to contact remote host
5579:
5580: =item * B<con_delayed>: unable to contact remote host, message will be delivered
5581: when the connection is brought back up
5582:
5583: =item * B<con_failed>: unable to contact remote host and unable to save message
5584: for later delivery
5585:
5586: =item * B<error:>: an error a occured, a description of the error follows the :
5587:
5588: =item * B<no_such_host>: unable to fund a host associated with the user/domain
5589: that was requested
5590:
5591: =back
5592:
5593: =head1 PUBLIC SUBROUTINES
5594:
5595: =head2 Session Environment Functions
5596:
5597: =over 4
5598:
5599: =item *
5600: X<appenv()>
5601: B<appenv(%hash)>: the value of %hash is written to
5602: the user envirnoment file, and will be restored for each access this
5603: user makes during this session, also modifies the %ENV for the current
5604: process
5605:
5606: =item *
5607: X<delenv()>
5608: B<delenv($regexp)>: removes all items from the session
5609: environment file that matches the regular expression in $regexp. The
5610: values are also delted from the current processes %ENV.
5611:
5612: =back
5613:
5614: =head2 User Information
5615:
5616: =over 4
5617:
5618: =item *
5619: X<queryauthenticate()>
5620: B<queryauthenticate($uname,$udom)>: try to determine user's current
5621: authentication scheme
5622:
5623: =item *
5624: X<authenticate()>
5625: B<authenticate($uname,$upass,$udom)>: try to
5626: authenticate user from domain's lib servers (first use the current
5627: one). C<$upass> should be the users password.
5628:
5629: =item *
5630: X<homeserver()>
5631: B<homeserver($uname,$udom)>: find the server which has
5632: the user's directory and files (there must be only one), this caches
5633: the answer, and also caches if there is a borken connection.
5634:
5635: =item *
5636: X<idget()>
5637: B<idget($udom,@ids)>: find the usernames behind a list of IDs
5638: (IDs are a unique resource in a domain, there must be only 1 ID per
5639: username, and only 1 username per ID in a specific domain) (returns
5640: hash: id=>name,id=>name)
5641:
5642: =item *
5643: X<idrget()>
5644: B<idrget($udom,@unames)>: find the IDs behind a list of
5645: usernames (returns hash: name=>id,name=>id)
5646:
5647: =item *
5648: X<idput()>
5649: B<idput($udom,%ids)>: store away a list of names and associated IDs
5650:
5651: =item *
5652: X<rolesinit()>
5653: B<rolesinit($udom,$username,$authhost)>: get user privileges
5654:
5655: =item *
5656: X<usection()>
5657: B<usection($udom,$uname,$cname)>: finds the section of student in the
5658: course $cname, return section name/number or '' for "not in course"
5659: and '-1' for "no section"
5660:
5661: =item *
5662: X<userenvironment()>
5663: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
5664: passed in @what from the requested user's environment, returns a hash
5665:
5666: =back
5667:
5668: =head2 User Roles
5669:
5670: =over 4
5671:
5672: =item *
5673:
5674: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
5675: actions
5676: F: full access
5677: U,I,K: authentication modes (cxx only)
5678: '': forbidden
5679: 1: user needs to choose course
5680: 2: browse allowed
5681:
5682: =item *
5683:
5684: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
5685: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
5686: and course level
5687:
5688: =item *
5689:
5690: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
5691: explanation of a user role term
5692:
5693: =back
5694:
5695: =head2 User Modification
5696:
5697: =over 4
5698:
5699: =item *
5700:
5701: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
5702: user for the level given by URL. Optional start and end dates (leave empty
5703: string or zero for "no date")
5704:
5705: =item *
5706:
5707: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
5708: change a users, password, possible return values are: ok,
5709: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
5710: refused
5711:
5712: =item *
5713:
5714: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
5715:
5716: =item *
5717:
5718: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
5719: modify user
5720:
5721: =item *
5722:
5723: modifystudent
5724:
5725: modify a students enrollment and identification information.
5726: The course id is resolved based on the current users environment.
5727: This means the envoking user must be a course coordinator or otherwise
5728: associated with a course.
5729:
5730: This call is essentially a wrapper for lonnet::modifyuser and
5731: lonnet::modify_student_enrollment
5732:
5733: Inputs:
5734:
5735: =over 4
5736:
5737: =item B<$udom> Students loncapa domain
5738:
5739: =item B<$uname> Students loncapa login name
5740:
5741: =item B<$uid> Students id/student number
5742:
5743: =item B<$umode> Students authentication mode
5744:
5745: =item B<$upass> Students password
5746:
5747: =item B<$first> Students first name
5748:
5749: =item B<$middle> Students middle name
5750:
5751: =item B<$last> Students last name
5752:
5753: =item B<$gene> Students generation
5754:
5755: =item B<$usec> Students section in course
5756:
5757: =item B<$end> Unix time of the roles expiration
5758:
5759: =item B<$start> Unix time of the roles start date
5760:
5761: =item B<$forceid> If defined, allow $uid to be changed
5762:
5763: =item B<$desiredhome> server to use as home server for student
5764:
5765: =back
5766:
5767: =item *
5768:
5769: modify_student_enrollment
5770:
5771: Change a students enrollment status in a class. The environment variable
5772: 'role.request.course' must be defined for this function to proceed.
5773:
5774: Inputs:
5775:
5776: =over 4
5777:
5778: =item $udom, students domain
5779:
5780: =item $uname, students name
5781:
5782: =item $uid, students user id
5783:
5784: =item $first, students first name
5785:
5786: =item $middle
5787:
5788: =item $last
5789:
5790: =item $gene
5791:
5792: =item $usec
5793:
5794: =item $end
5795:
5796: =item $start
5797:
5798: =back
5799:
5800:
5801: =item *
5802:
5803: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
5804: custom role; give a custom role to a user for the level given by URL. Specify
5805: name and domain of role author, and role name
5806:
5807: =item *
5808:
5809: revokerole($udom,$uname,$url,$role) : revoke a role for url
5810:
5811: =item *
5812:
5813: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
5814:
5815: =back
5816:
5817: =head2 Course Infomation
5818:
5819: =over 4
5820:
5821: =item *
5822:
5823: coursedescription($courseid) : course description
5824:
5825: =item *
5826:
5827: courseresdata($coursenum,$coursedomain,@which) : request for current
5828: parameter setting for a specific course, @what should be a list of
5829: parameters to ask about. This routine caches answers for 5 minutes.
5830:
5831: =back
5832:
5833: =head2 Course Modification
5834:
5835: =over 4
5836:
5837: =item *
5838:
5839: writecoursepref($courseid,%prefs) : write preferences (environment
5840: database) for a course
5841:
5842: =item *
5843:
5844: createcourse($udom,$description,$url) : make/modify course
5845:
5846: =back
5847:
5848: =head2 Resource Subroutines
5849:
5850: =over 4
5851:
5852: =item *
5853:
5854: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
5855:
5856: =item *
5857:
5858: repcopy($filename) : subscribes to the requested file, and attempts to
5859: replicate from the owning library server, Might return
5860: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
5861: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
5862: resource. Expects the local filesystem pathname
5863: (/home/httpd/html/res/....)
5864:
5865: =back
5866:
5867: =head2 Resource Information
5868:
5869: =over 4
5870:
5871: =item *
5872:
5873: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
5874: a vairety of different possible values, $varname should be a request
5875: string, and the other parameters can be used to specify who and what
5876: one is asking about.
5877:
5878: Possible values for $varname are environment.lastname (or other item
5879: from the envirnment hash), user.name (or someother aspect about the
5880: user), resource.0.maxtries (or some other part and parameter of a
5881: resource)
5882:
5883: =item *
5884:
5885: directcondval($number) : get current value of a condition; reads from a state
5886: string
5887:
5888: =item *
5889:
5890: condval($condidx) : value of condition index based on state
5891:
5892: =item *
5893:
5894: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
5895: resource's metadata, $what should be either a specific key, or either
5896: 'keys' (to get a list of possible keys) or 'packages' to get a list of
5897: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
5898:
5899: this function automatically caches all requests
5900:
5901: =item *
5902:
5903: metadata_query($query,$custom,$customshow) : make a metadata query against the
5904: network of library servers; returns file handle of where SQL and regex results
5905: will be stored for query
5906:
5907: =item *
5908:
5909: symbread($filename) : return symbolic list entry (filename argument optional);
5910: returns the data handle
5911:
5912: =item *
5913:
5914: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
5915: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
5916: failure, user must be in a course, as it assumes the existance of the
5917: course initi hash, and uses $ENV('request.course.id'}
5918:
5919:
5920: =item *
5921:
5922: symbclean($symb) : removes versions numbers from a symb, returns the
5923: cleaned symb
5924:
5925: =item *
5926:
5927: is_on_map($uri) : checks if the $uri is somewhere on the current
5928: course map, user must be in a course for it to work.
5929:
5930: =item *
5931:
5932: numval($salt) : return random seed value (addend for rndseed)
5933:
5934: =item *
5935:
5936: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
5937: a random seed, all arguments are optional, if they aren't sent it uses the
5938: environment to derive them. Note: if symb isn't sent and it can't get one
5939: from &symbread it will use the current time as its return value
5940:
5941: =item *
5942:
5943: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
5944: unfakeable, receipt
5945:
5946: =item *
5947:
5948: receipt() : API to ireceipt working off of ENV values; given out to users
5949:
5950: =item *
5951:
5952: countacc($url) : count the number of accesses to a given URL
5953:
5954: =item *
5955:
5956: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
5957:
5958: =item *
5959:
5960: checkin($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 $tcrsid)
5961:
5962: =item *
5963:
5964: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
5965:
5966: =item *
5967:
5968: devalidate($symb) : devalidate temporary spreadsheet calculations,
5969: forcing spreadsheet to reevaluate the resource scores next time.
5970:
5971: =back
5972:
5973: =head2 Storing/Retreiving Data
5974:
5975: =over 4
5976:
5977: =item *
5978:
5979: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
5980: for this url; hashref needs to be given and should be a \%hashname; the
5981: remaining args aren't required and if they aren't passed or are '' they will
5982: be derived from the ENV
5983:
5984: =item *
5985:
5986: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
5987: uses critical subroutine
5988:
5989: =item *
5990:
5991: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
5992: all args are optional
5993:
5994: =item *
5995:
5996: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
5997: works very similar to store/cstore, but all data is stored in a
5998: temporary location and can be reset using tmpreset, $storehash should
5999: be a hash reference, returns nothing on success
6000:
6001: =item *
6002:
6003: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
6004: similar to restore, but all data is stored in a temporary location and
6005: can be reset using tmpreset. Returns a hash of values on success,
6006: error string otherwise.
6007:
6008: =item *
6009:
6010: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
6011: deltes all keys for $symb form the temporary storage hash.
6012:
6013: =item *
6014:
6015: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6016: reference filled in from namesp ($udom and $uname are optional)
6017:
6018: =item *
6019:
6020: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
6021: namesp ($udom and $uname are optional)
6022:
6023: =item *
6024:
6025: dump($namespace,$udom,$uname,$regexp) :
6026: dumps the complete (or key matching regexp) namespace into a hash
6027: ($udom, $uname and $regexp are optional)
6028:
6029: =item *
6030:
6031: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
6032: $store can be a scalar, an array reference, or if the amount to be
6033: incremented is > 1, a hash reference.
6034:
6035: ($udom and $uname are optional)
6036:
6037: =item *
6038:
6039: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
6040: ($udom and $uname are optional)
6041:
6042: =item *
6043:
6044: putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
6045: keys used in storehash include version information (e.g., 1:$symb:message etc.) as
6046: used in records written by &store and retrieved by &restore. This function
6047: was created for use in editing discussion posts, without incrementing the
6048: version number included in the key for a particular post. The colon
6049: separated list of attribute names (e.g., the value associated with the key
6050: 1:keys:$symb) is also generated and passed in the ampersand separated
6051: items sent to lonnet::reply().
6052:
6053: =item *
6054:
6055: cput($namespace,$storehash,$udom,$uname) : critical put
6056: ($udom and $uname are optional)
6057:
6058: =item *
6059:
6060: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6061: reference filled in from namesp (encrypts the return communication)
6062: ($udom and $uname are optional)
6063:
6064: =item *
6065:
6066: log($udom,$name,$home,$message) : write to permanent log for user; use
6067: critical subroutine
6068:
6069: =back
6070:
6071: =head2 Network Status Functions
6072:
6073: =over 4
6074:
6075: =item *
6076:
6077: dirlist($uri) : return directory list based on URI
6078:
6079: =item *
6080:
6081: spareserver() : find server with least workload from spare.tab
6082:
6083: =back
6084:
6085: =head2 Apache Request
6086:
6087: =over 4
6088:
6089: =item *
6090:
6091: ssi($url,%hash) : server side include, does a complete request cycle on url to
6092: localhost, posts hash
6093:
6094: =back
6095:
6096: =head2 Data to String to Data
6097:
6098: =over 4
6099:
6100: =item *
6101:
6102: hash2str(%hash) : convert a hash into a string complete with escaping and '='
6103: and '&' separators, supports elements that are arrayrefs and hashrefs
6104:
6105: =item *
6106:
6107: hashref2str($hashref) : convert a hashref into a string complete with
6108: escaping and '=' and '&' separators, supports elements that are
6109: arrayrefs and hashrefs
6110:
6111: =item *
6112:
6113: arrayref2str($arrayref) : convert an arrayref into a string complete
6114: with escaping and '&' separators, supports elements that are arrayrefs
6115: and hashrefs
6116:
6117: =item *
6118:
6119: str2hash($string) : convert string to hash using unescaping and
6120: splitting on '=' and '&', supports elements that are arrayrefs and
6121: hashrefs
6122:
6123: =item *
6124:
6125: str2array($string) : convert string to hash using unescaping and
6126: splitting on '&', supports elements that are arrayrefs and hashrefs
6127:
6128: =back
6129:
6130: =head2 Logging Routines
6131:
6132: =over 4
6133:
6134: These routines allow one to make log messages in the lonnet.log and
6135: lonnet.perm logfiles.
6136:
6137: =item *
6138:
6139: logtouch() : make sure the logfile, lonnet.log, exists
6140:
6141: =item *
6142:
6143: logthis() : append message to the normal lonnet.log file, it gets
6144: preiodically rolled over and deleted.
6145:
6146: =item *
6147:
6148: logperm() : append a permanent message to lonnet.perm.log, this log
6149: file never gets deleted by any automated portion of the system, only
6150: messages of critical importance should go in here.
6151:
6152: =back
6153:
6154: =head2 General File Helper Routines
6155:
6156: =over 4
6157:
6158: =item *
6159:
6160: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
6161: (a) files in /uploaded
6162: (i) If a local copy of the file exists -
6163: compares modification date of local copy with last-modified date for
6164: definitive version stored on home server for course. If local copy is
6165: stale, requests a new version from the home server and stores it.
6166: If the original has been removed from the home server, then local copy
6167: is unlinked.
6168: (ii) If local copy does not exist -
6169: requests the file from the home server and stores it.
6170:
6171: If $caller is 'uploadrep':
6172: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
6173: for request for files originally uploaded via DOCS.
6174: - returns 'ok' if fresh local copy now available, -1 otherwise.
6175:
6176: Otherwise:
6177: This indicates a call from the content generation phase of the request.
6178: - returns the entire contents of the file or -1.
6179:
6180: (b) files in /res
6181: - returns the entire contents of a file or -1;
6182: it properly subscribes to and replicates the file if neccessary.
6183:
6184: =item *
6185:
6186: filelocation($dir,$file) : returns file system location of a file
6187: based on URI; meant to be "fairly clean" absolute reference, $dir is a
6188: directory that relative $file lookups are to looked in ($dir of /a/dir
6189: and a file of ../bob will become /a/bob)
6190:
6191: =item *
6192:
6193: hreflocation($dir,$file) : returns file system location or a URL; same as
6194: filelocation except for hrefs
6195:
6196: =item *
6197:
6198: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
6199:
6200: =back
6201:
6202: =head2 HTTP Helper Routines
6203:
6204: =over 4
6205:
6206: =item *
6207:
6208: escape() : unpack non-word characters into CGI-compatible hex codes
6209:
6210: =item *
6211:
6212: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
6213:
6214: =back
6215:
6216: =head1 PRIVATE SUBROUTINES
6217:
6218: =head2 Underlying communication routines (Shouldn't call)
6219:
6220: =over 4
6221:
6222: =item *
6223:
6224: subreply() : tries to pass a message to lonc, returns con_lost if incapable
6225:
6226: =item *
6227:
6228: reply() : uses subreply to send a message to remote machine, logs all failures
6229:
6230: =item *
6231:
6232: critical() : passes a critical message to another server; if cannot
6233: get through then place message in connection buffer directory and
6234: returns con_delayed, if incapable of saving message, returns
6235: con_failed
6236:
6237: =item *
6238:
6239: reconlonc() : tries to reconnect lonc client processes.
6240:
6241: =back
6242:
6243: =head2 Resource Access Logging
6244:
6245: =over 4
6246:
6247: =item *
6248:
6249: flushcourselogs() : flush (save) buffer logs and access logs
6250:
6251: =item *
6252:
6253: courselog($what) : save message for course in hash
6254:
6255: =item *
6256:
6257: courseacclog($what) : save message for course using &courselog(). Perform
6258: special processing for specific resource types (problems, exams, quizzes, etc).
6259:
6260: =item *
6261:
6262: goodbye() : flush course logs and log shutting down; it is called in srm.conf
6263: as a PerlChildExitHandler
6264:
6265: =back
6266:
6267: =head2 Other
6268:
6269: =over 4
6270:
6271: =item *
6272:
6273: symblist($mapname,%newhash) : update symbolic storage links
6274:
6275: =back
6276:
6277: =cut
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