1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.560 2004/11/03 21:12:12 banghart 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 %getsectioncache %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::lonlocal;
51: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
52: use Time::HiRes qw( gettimeofday tv_interval );
53: my $readit;
54: my $max_connection_retries = 10; # Or some such value.
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: #
120: # With loncnew process trimming, there's a timing hole between lonc server
121: # process exit and the master server picking up the listen on the AF_UNIX
122: # socket. In that time interval, a lock file will exist:
123:
124: my $lockfile=$peerfile.".lock";
125: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
126: sleep(1);
127: }
128: # At this point, either a loncnew parent is listening or an old lonc
129: # or loncnew child is listening so we can connect or everything's dead.
130: #
131: # We'll give the connection a few tries before abandoning it. If
132: # connection is not possible, we'll con_lost back to the client.
133: #
134: my $client;
135: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
136: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
137: Type => SOCK_STREAM,
138: Timeout => 10);
139: if($client) {
140: last; # Connected!
141: }
142: sleep(1); # Try again later if failed connection.
143: }
144: my $answer;
145: if ($client) {
146: print $client "$cmd\n";
147: $answer=<$client>;
148: if (!$answer) { $answer="con_lost"; }
149: chomp($answer);
150: } else {
151: $answer = 'con_lost'; # Failed connection.
152: }
153: return $answer;
154: }
155:
156: sub reply {
157: my ($cmd,$server)=@_;
158: unless (defined($hostname{$server})) { return 'no_such_host'; }
159: my $answer=subreply($cmd,$server);
160: if ($answer eq 'con_lost') {
161: #sleep 5;
162: #$answer=subreply($cmd,$server);
163: #if ($answer eq 'con_lost') {
164: # &logthis("Second attempt con_lost on $server");
165: # my $peerfile="$perlvar{'lonSockDir'}/$server";
166: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
167: # Type => SOCK_STREAM,
168: # Timeout => 10)
169: # or return "con_lost";
170: # &logthis("Killing socket");
171: # print $client "close_connection_exit\n";
172: #sleep 5;
173: # $answer=subreply($cmd,$server);
174: #}
175: }
176: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
177: &logthis("<font color=blue>WARNING:".
178: " $cmd to $server returned $answer</font>");
179: }
180: return $answer;
181: }
182:
183: # ----------------------------------------------------------- Send USR1 to lonc
184:
185: sub reconlonc {
186: my $peerfile=shift;
187: &logthis("Trying to reconnect for $peerfile");
188: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
189: if (open(my $fh,"<$loncfile")) {
190: my $loncpid=<$fh>;
191: chomp($loncpid);
192: if (kill 0 => $loncpid) {
193: &logthis("lonc at pid $loncpid responding, sending USR1");
194: kill USR1 => $loncpid;
195: sleep 1;
196: if (-e "$peerfile") { return; }
197: &logthis("$peerfile still not there, give it another try");
198: sleep 5;
199: if (-e "$peerfile") { return; }
200: &logthis(
201: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
202: } else {
203: &logthis(
204: "<font color=blue>WARNING:".
205: " lonc at pid $loncpid not responding, giving up</font>");
206: }
207: } else {
208: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
209: }
210: }
211:
212: # ------------------------------------------------------ Critical communication
213:
214: sub critical {
215: my ($cmd,$server)=@_;
216: unless ($hostname{$server}) {
217: &logthis("<font color=blue>WARNING:".
218: " Critical message to unknown server ($server)</font>");
219: return 'no_such_host';
220: }
221: my $answer=reply($cmd,$server);
222: if ($answer eq 'con_lost') {
223: my $pingreply=reply('ping',$server);
224: &reconlonc("$perlvar{'lonSockDir'}/$server");
225: my $pongreply=reply('pong',$server);
226: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
227: $answer=reply($cmd,$server);
228: if ($answer eq 'con_lost') {
229: my $now=time;
230: my $middlename=$cmd;
231: $middlename=substr($middlename,0,16);
232: $middlename=~s/\W//g;
233: my $dfilename=
234: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
235: $dumpcount++;
236: {
237: my $dfh;
238: if (open($dfh,">$dfilename")) {
239: print $dfh "$cmd\n";
240: close($dfh);
241: }
242: }
243: sleep 2;
244: my $wcmd='';
245: {
246: my $dfh;
247: if (open($dfh,"<$dfilename")) {
248: $wcmd=<$dfh>;
249: close($dfh);
250: }
251: }
252: chomp($wcmd);
253: if ($wcmd eq $cmd) {
254: &logthis("<font color=blue>WARNING: ".
255: "Connection buffer $dfilename: $cmd</font>");
256: &logperm("D:$server:$cmd");
257: return 'con_delayed';
258: } else {
259: &logthis("<font color=red>CRITICAL:"
260: ." Critical connection failed: $server $cmd</font>");
261: &logperm("F:$server:$cmd");
262: return 'con_failed';
263: }
264: }
265: }
266: return $answer;
267: }
268:
269: #
270: # -------------- Remove all key from the env that start witha lowercase letter
271: # (Which is always a lon-capa value)
272:
273: sub cleanenv {
274: # unless (defined(&Apache::exists_config_define("MODPERL2"))) { return; }
275: # unless (&Apache::exists_config_define("MODPERL2")) { return; }
276: foreach my $key (keys(%ENV)) {
277: if ($key =~ /^[a-z]/) {
278: delete($ENV{$key});
279: }
280: }
281: }
282:
283: # ------------------------------------------- Transfer profile into environment
284:
285: sub transfer_profile_to_env {
286: my ($lonidsdir,$handle)=@_;
287: my @profile;
288: {
289: open(my $idf,"$lonidsdir/$handle.id");
290: flock($idf,LOCK_SH);
291: @profile=<$idf>;
292: close($idf);
293: }
294: my $envi;
295: my %Remove;
296: for ($envi=0;$envi<=$#profile;$envi++) {
297: chomp($profile[$envi]);
298: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
299: $ENV{$envname} = $envvalue;
300: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
301: if ($time < time-300) {
302: $Remove{$key}++;
303: }
304: }
305: }
306: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
307: foreach my $expired_key (keys(%Remove)) {
308: &delenv($expired_key);
309: }
310: }
311:
312: # ---------------------------------------------------------- Append Environment
313:
314: sub appenv {
315: my %newenv=@_;
316: foreach (keys %newenv) {
317: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
318: &logthis("<font color=blue>WARNING: ".
319: "Attempt to modify environment ".$_." to ".$newenv{$_}
320: .'</font>');
321: delete($newenv{$_});
322: } else {
323: $ENV{$_}=$newenv{$_};
324: }
325: }
326:
327: my $lockfh;
328: unless (open($lockfh,"$ENV{'user.environment'}")) {
329: return 'error: '.$!;
330: }
331: unless (flock($lockfh,LOCK_EX)) {
332: &logthis("<font color=blue>WARNING: ".
333: 'Could not obtain exclusive lock in appenv: '.$!);
334: close($lockfh);
335: return 'error: '.$!;
336: }
337:
338: my @oldenv;
339: {
340: my $fh;
341: unless (open($fh,"$ENV{'user.environment'}")) {
342: return 'error: '.$!;
343: }
344: @oldenv=<$fh>;
345: close($fh);
346: }
347: for (my $i=0; $i<=$#oldenv; $i++) {
348: chomp($oldenv[$i]);
349: if ($oldenv[$i] ne '') {
350: my ($name,$value)=split(/=/,$oldenv[$i]);
351: unless (defined($newenv{$name})) {
352: $newenv{$name}=$value;
353: }
354: }
355: }
356: {
357: my $fh;
358: unless (open($fh,">$ENV{'user.environment'}")) {
359: return 'error';
360: }
361: my $newname;
362: foreach $newname (keys %newenv) {
363: print $fh "$newname=$newenv{$newname}\n";
364: }
365: close($fh);
366: }
367:
368: close($lockfh);
369: return 'ok';
370: }
371: # ----------------------------------------------------- Delete from Environment
372:
373: sub delenv {
374: my $delthis=shift;
375: my %newenv=();
376: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
377: &logthis("<font color=blue>WARNING: ".
378: "Attempt to delete from environment ".$delthis);
379: return 'error';
380: }
381: my @oldenv;
382: {
383: my $fh;
384: unless (open($fh,"$ENV{'user.environment'}")) {
385: return 'error';
386: }
387: unless (flock($fh,LOCK_SH)) {
388: &logthis("<font color=blue>WARNING: ".
389: 'Could not obtain shared lock in delenv: '.$!);
390: close($fh);
391: return 'error: '.$!;
392: }
393: @oldenv=<$fh>;
394: close($fh);
395: }
396: {
397: my $fh;
398: unless (open($fh,">$ENV{'user.environment'}")) {
399: return 'error';
400: }
401: unless (flock($fh,LOCK_EX)) {
402: &logthis("<font color=blue>WARNING: ".
403: 'Could not obtain exclusive lock in delenv: '.$!);
404: close($fh);
405: return 'error: '.$!;
406: }
407: foreach (@oldenv) {
408: if ($_=~/^$delthis/) {
409: my ($key,undef) = split('=',$_);
410: delete($ENV{$key});
411: } else {
412: print $fh $_;
413: }
414: }
415: close($fh);
416: }
417: return 'ok';
418: }
419:
420: # ------------------------------------------ Find out current server userload
421: # there is a copy in lond
422: sub userload {
423: my $numusers=0;
424: {
425: opendir(LONIDS,$perlvar{'lonIDsDir'});
426: my $filename;
427: my $curtime=time;
428: while ($filename=readdir(LONIDS)) {
429: if ($filename eq '.' || $filename eq '..') {next;}
430: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
431: if ($curtime-$mtime < 1800) { $numusers++; }
432: }
433: closedir(LONIDS);
434: }
435: my $userloadpercent=0;
436: my $maxuserload=$perlvar{'lonUserLoadLim'};
437: if ($maxuserload) {
438: $userloadpercent=100*$numusers/$maxuserload;
439: }
440: $userloadpercent=sprintf("%.2f",$userloadpercent);
441: return $userloadpercent;
442: }
443:
444: # ------------------------------------------ Fight off request when overloaded
445:
446: sub overloaderror {
447: my ($r,$checkserver)=@_;
448: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
449: my $loadavg;
450: if ($checkserver eq $perlvar{'lonHostID'}) {
451: open(my $loadfile,'/proc/loadavg');
452: $loadavg=<$loadfile>;
453: $loadavg =~ s/\s.*//g;
454: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
455: close($loadfile);
456: } else {
457: $loadavg=&reply('load',$checkserver);
458: }
459: my $overload=$loadavg-100;
460: if ($overload>0) {
461: $r->err_headers_out->{'Retry-After'}=$overload;
462: $r->log_error('Overload of '.$overload.' on '.$checkserver);
463: return 413;
464: }
465: return '';
466: }
467:
468: # ------------------------------ Find server with least workload from spare.tab
469:
470: sub spareserver {
471: my ($loadpercent,$userloadpercent) = @_;
472: my $tryserver;
473: my $spareserver='';
474: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
475: my $lowestserver=$loadpercent > $userloadpercent?
476: $loadpercent : $userloadpercent;
477: foreach $tryserver (keys %spareid) {
478: my $loadans=reply('load',$tryserver);
479: my $userloadans=reply('userload',$tryserver);
480: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
481: next; #didn't get a number from the server
482: }
483: my $answer;
484: if ($loadans =~ /\d/) {
485: if ($userloadans =~ /\d/) {
486: #both are numbers, pick the bigger one
487: $answer=$loadans > $userloadans?
488: $loadans : $userloadans;
489: } else {
490: $answer = $loadans;
491: }
492: } else {
493: $answer = $userloadans;
494: }
495: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
496: $spareserver="http://$hostname{$tryserver}";
497: $lowestserver=$answer;
498: }
499: }
500: return $spareserver;
501: }
502:
503: # --------------------------------------------- Try to change a user's password
504:
505: sub changepass {
506: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
507: $currentpass = &escape($currentpass);
508: $newpass = &escape($newpass);
509: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
510: $server);
511: if (! $answer) {
512: &logthis("No reply on password change request to $server ".
513: "by $uname in domain $udom.");
514: } elsif ($answer =~ "^ok") {
515: &logthis("$uname in $udom successfully changed their password ".
516: "on $server.");
517: } elsif ($answer =~ "^pwchange_failure") {
518: &logthis("$uname in $udom was unable to change their password ".
519: "on $server. The action was blocked by either lcpasswd ".
520: "or pwchange");
521: } elsif ($answer =~ "^non_authorized") {
522: &logthis("$uname in $udom did not get their password correct when ".
523: "attempting to change it on $server.");
524: } elsif ($answer =~ "^auth_mode_error") {
525: &logthis("$uname in $udom attempted to change their password despite ".
526: "not being locally or internally authenticated on $server.");
527: } elsif ($answer =~ "^unknown_user") {
528: &logthis("$uname in $udom attempted to change their password ".
529: "on $server but were unable to because $server is not ".
530: "their home server.");
531: } elsif ($answer =~ "^refused") {
532: &logthis("$server refused to change $uname in $udom password because ".
533: "it was sent an unencrypted request to change the password.");
534: }
535: return $answer;
536: }
537:
538: # ----------------------- Try to determine user's current authentication scheme
539:
540: sub queryauthenticate {
541: my ($uname,$udom)=@_;
542: my $uhome=&homeserver($uname,$udom);
543: if (!$uhome) {
544: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
545: return 'no_host';
546: }
547: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
548: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
549: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
550: }
551: return $answer;
552: }
553:
554: # --------- Try to authenticate user from domain's lib servers (first this one)
555:
556: sub authenticate {
557: my ($uname,$upass,$udom)=@_;
558: $upass=escape($upass);
559: $uname=~s/\W//g;
560: my $uhome=&homeserver($uname,$udom);
561: if (!$uhome) {
562: &logthis("User $uname at $udom is unknown in authenticate");
563: return 'no_host';
564: }
565: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
566: if ($answer eq 'authorized') {
567: &logthis("User $uname at $udom authorized by $uhome");
568: return $uhome;
569: }
570: if ($answer eq 'non_authorized') {
571: &logthis("User $uname at $udom rejected by $uhome");
572: return 'no_host';
573: }
574: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
575: return 'no_host';
576: }
577:
578: # ---------------------- Find the homebase for a user from domain's lib servers
579:
580: sub homeserver {
581: my ($uname,$udom,$ignoreBadCache)=@_;
582: my $index="$uname:$udom";
583:
584: my ($result,$cached)=&is_cached(\%homecache,$index,'home',86400);
585: if (defined($cached)) { return $result; }
586: my $tryserver;
587: foreach $tryserver (keys %libserv) {
588: next if ($ignoreBadCache ne 'true' &&
589: exists($badServerCache{$tryserver}));
590: if ($hostdom{$tryserver} eq $udom) {
591: my $answer=reply("home:$udom:$uname",$tryserver);
592: if ($answer eq 'found') {
593: return &do_cache(\%homecache,$index,$tryserver,'home');
594: } elsif ($answer eq 'no_host') {
595: $badServerCache{$tryserver}=1;
596: }
597: }
598: }
599: return 'no_host';
600: }
601:
602: # ------------------------------------- Find the usernames behind a list of IDs
603:
604: sub idget {
605: my ($udom,@ids)=@_;
606: my %returnhash=();
607:
608: my $tryserver;
609: foreach $tryserver (keys %libserv) {
610: if ($hostdom{$tryserver} eq $udom) {
611: my $idlist=join('&',@ids);
612: $idlist=~tr/A-Z/a-z/;
613: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
614: my @answer=();
615: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
616: @answer=split(/\&/,$reply);
617: } ;
618: my $i;
619: for ($i=0;$i<=$#ids;$i++) {
620: if ($answer[$i]) {
621: $returnhash{$ids[$i]}=$answer[$i];
622: }
623: }
624: }
625: }
626: return %returnhash;
627: }
628:
629: # ------------------------------------- Find the IDs behind a list of usernames
630:
631: sub idrget {
632: my ($udom,@unames)=@_;
633: my %returnhash=();
634: foreach (@unames) {
635: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
636: }
637: return %returnhash;
638: }
639:
640: # ------------------------------- Store away a list of names and associated IDs
641:
642: sub idput {
643: my ($udom,%ids)=@_;
644: my %servers=();
645: foreach (keys %ids) {
646: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
647: my $uhom=&homeserver($_,$udom);
648: if ($uhom ne 'no_host') {
649: my $id=&escape($ids{$_});
650: $id=~tr/A-Z/a-z/;
651: my $unam=&escape($_);
652: if ($servers{$uhom}) {
653: $servers{$uhom}.='&'.$id.'='.$unam;
654: } else {
655: $servers{$uhom}=$id.'='.$unam;
656: }
657: }
658: }
659: foreach (keys %servers) {
660: &critical('idput:'.$udom.':'.$servers{$_},$_);
661: }
662: }
663:
664: # --------------------------------------------------- Assign a key to a student
665:
666: sub assign_access_key {
667: #
668: # a valid key looks like uname:udom#comments
669: # comments are being appended
670: #
671: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
672: $kdom=
673: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($kdom));
674: $knum=
675: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($knum));
676: $cdom=
677: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
678: $cnum=
679: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
680: $udom=$ENV{'user.name'} unless (defined($udom));
681: $uname=$ENV{'user.domain'} unless (defined($uname));
682: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
683: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
684: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
685: # assigned to this person
686: # - this should not happen,
687: # unless something went wrong
688: # the first time around
689: # ready to assign
690: $logentry=$1.'; '.$logentry;
691: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
692: $kdom,$knum) eq 'ok') {
693: # key now belongs to user
694: my $envkey='key.'.$cdom.'_'.$cnum;
695: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
696: &appenv('environment.'.$envkey => $ckey);
697: return 'ok';
698: } else {
699: return
700: 'error: Count not permanently assign key, will need to be re-entered later.';
701: }
702: } else {
703: return 'error: Could not assign key, try again later.';
704: }
705: } elsif (!$existing{$ckey}) {
706: # the key does not exist
707: return 'error: The key does not exist';
708: } else {
709: # the key is somebody else's
710: return 'error: The key is already in use';
711: }
712: }
713:
714: # ------------------------------------------ put an additional comment on a key
715:
716: sub comment_access_key {
717: #
718: # a valid key looks like uname:udom#comments
719: # comments are being appended
720: #
721: my ($ckey,$cdom,$cnum,$logentry)=@_;
722: $cdom=
723: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
724: $cnum=
725: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
726: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
727: if ($existing{$ckey}) {
728: $existing{$ckey}.='; '.$logentry;
729: # ready to assign
730: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
731: $cdom,$cnum) eq 'ok') {
732: return 'ok';
733: } else {
734: return 'error: Count not store comment.';
735: }
736: } else {
737: # the key does not exist
738: return 'error: The key does not exist';
739: }
740: }
741:
742: # ------------------------------------------------------ Generate a set of keys
743:
744: sub generate_access_keys {
745: my ($number,$cdom,$cnum,$logentry)=@_;
746: $cdom=
747: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
748: $cnum=
749: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
750: unless (&allowed('mky',$cdom)) { return 0; }
751: unless (($cdom) && ($cnum)) { return 0; }
752: if ($number>10000) { return 0; }
753: sleep(2); # make sure don't get same seed twice
754: srand(time()^($$+($$<<15))); # from "Programming Perl"
755: my $total=0;
756: for (my $i=1;$i<=$number;$i++) {
757: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
758: sprintf("%lx",int(100000*rand)).'-'.
759: sprintf("%lx",int(100000*rand));
760: $newkey=~s/1/g/g; # folks mix up 1 and l
761: $newkey=~s/0/h/g; # and also 0 and O
762: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
763: if ($existing{$newkey}) {
764: $i--;
765: } else {
766: if (&put('accesskeys',
767: { $newkey => '# generated '.localtime().
768: ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
769: '; '.$logentry },
770: $cdom,$cnum) eq 'ok') {
771: $total++;
772: }
773: }
774: }
775: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
776: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
777: return $total;
778: }
779:
780: # ------------------------------------------------------- Validate an accesskey
781:
782: sub validate_access_key {
783: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
784: $cdom=
785: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
786: $cnum=
787: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
788: $udom=$ENV{'user.domain'} unless (defined($udom));
789: $uname=$ENV{'user.name'} unless (defined($uname));
790: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
791: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
792: }
793:
794: # ------------------------------------- Find the section of student in a course
795:
796: sub getsection {
797: my ($udom,$unam,$courseid)=@_;
798: $courseid=~s/\_/\//g;
799: $courseid=~s/^(\w)/\/$1/;
800:
801: my $hashid="$udom:$unam:$courseid";
802: my ($result,$cached)=&is_cached(\%getsectioncache,$hashid,'getsection');
803: if (defined($cached)) { return $result; }
804:
805: my %Pending;
806: my %Expired;
807: #
808: # Each role can either have not started yet (pending), be active,
809: # or have expired.
810: #
811: # If there is an active role, we are done.
812: #
813: # If there is more than one role which has not started yet,
814: # choose the one which will start sooner
815: # If there is one role which has not started yet, return it.
816: #
817: # If there is more than one expired role, choose the one which ended last.
818: # If there is a role which has expired, return it.
819: #
820: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
821: &homeserver($unam,$udom)))) {
822: my ($key,$value)=split(/\=/,$_);
823: $key=&unescape($key);
824: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
825: my $section=$1;
826: if ($key eq $courseid.'_st') { $section=''; }
827: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
828: my $now=time;
829: if (defined($end) && $end && ($now > $end)) {
830: $Expired{$end}=$section;
831: next;
832: }
833: if (defined($start) && $start && ($now < $start)) {
834: $Pending{$start}=$section;
835: next;
836: }
837: return &do_cache(\%getsectioncache,$hashid,$section,'getsection');
838: }
839: #
840: # Presumedly there will be few matching roles from the above
841: # loop and the sorting time will be negligible.
842: if (scalar(keys(%Pending))) {
843: my ($time) = sort {$a <=> $b} keys(%Pending);
844: return &do_cache(\%getsectioncache,$hashid,$Pending{$time},'getsection');
845: }
846: if (scalar(keys(%Expired))) {
847: my @sorted = sort {$a <=> $b} keys(%Expired);
848: my $time = pop(@sorted);
849: return &do_cache(\%getsectioncache,$hashid,$Expired{$time},'getsection');
850: }
851: return &do_cache(\%getsectioncache,$hashid,'-1','getsection');
852: }
853:
854:
855: my $disk_caching_disabled=1;
856:
857: sub devalidate_cache {
858: my ($cache,$id,$name) = @_;
859: delete $$cache{$id.'.time'};
860: delete $$cache{$id.'.file'};
861: delete $$cache{$id};
862: if (1 || $disk_caching_disabled) { return; }
863: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
864: if (!-e $filename) { return; }
865: open(DB,">$filename.lock");
866: flock(DB,LOCK_EX);
867: my %hash;
868: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
869: eval <<'EVALBLOCK';
870: delete($hash{$id});
871: delete($hash{$id.'.time'});
872: EVALBLOCK
873: if ($@) {
874: &logthis("<font color='red'>devalidate_cache blew up :$@:$name</font>");
875: unlink($filename);
876: }
877: } else {
878: if (-e $filename) {
879: &logthis("Unable to tie hash (devalidate cache): $name");
880: unlink($filename);
881: }
882: }
883: untie(%hash);
884: flock(DB,LOCK_UN);
885: close(DB);
886: }
887:
888: sub is_cached {
889: my ($cache,$id,$name,$time) = @_;
890: if (!$time) { $time=300; }
891: if (!exists($$cache{$id.'.time'})) {
892: &load_cache_item($cache,$name,$id,$time);
893: }
894: if (!exists($$cache{$id.'.time'})) {
895: # &logthis("Didn't find $id");
896: return (undef,undef);
897: } else {
898: if (time-($$cache{$id.'.time'})>$time) {
899: if (exists($$cache{$id.'.file'})) {
900: foreach my $filename (@{ $$cache{$id.'.file'} }) {
901: my $mtime=(stat($filename))[9];
902: #+1 is to take care of edge effects
903: if ($mtime && (($mtime+1) < ($$cache{$id.'.time'}))) {
904: # &logthis("Upping $mtime - ".$$cache{$id.'.time'}.
905: # "$id because of $filename");
906: } else {
907: &logthis("Devalidating $filename $id - ".(time-($$cache{$id.'.time'})));
908: &devalidate_cache($cache,$id,$name);
909: return (undef,undef);
910: }
911: }
912: $$cache{$id.'.time'}=time;
913: } else {
914: # &logthis("Devalidating $id - ".time-($$cache{$id.'.time'}));
915: &devalidate_cache($cache,$id,$name);
916: return (undef,undef);
917: }
918: }
919: }
920: return ($$cache{$id},1);
921: }
922:
923: sub do_cache {
924: my ($cache,$id,$value,$name) = @_;
925: $$cache{$id.'.time'}=time;
926: $$cache{$id}=$value;
927: # &logthis("Caching $id as :$value:");
928: &save_cache_item($cache,$name,$id);
929: # do_cache implictly return the set value
930: $$cache{$id};
931: }
932:
933: my %do_save_item;
934: my %do_save;
935: sub save_cache_item {
936: my ($cache,$name,$id)=@_;
937: if ($disk_caching_disabled) { return; }
938: $do_save{$name}=$cache;
939: if (!exists($do_save_item{$name})) { $do_save_item{$name}={} }
940: $do_save_item{$name}->{$id}=1;
941: return;
942: }
943:
944: sub save_cache {
945: if ($disk_caching_disabled) { return; }
946: my ($cache,$name,$id);
947: foreach $name (keys(%do_save)) {
948: $cache=$do_save{$name};
949:
950: my $starttime=&Time::HiRes::time();
951: &logthis("Saving :$name:");
952: my %hash;
953: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
954: open(DB,">$filename.lock");
955: flock(DB,LOCK_EX);
956: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
957: foreach $id (keys(%{ $do_save_item{$name} })) {
958: eval <<'EVALBLOCK';
959: $hash{$id.'.time'}=$$cache{$id.'.time'};
960: $hash{$id}=freeze({'item'=>$$cache{$id}});
961: if (exists($$cache{$id.'.file'})) {
962: $hash{$id.'.file'}=freeze({'item'=>$$cache{$id.'.file'}});
963: }
964: EVALBLOCK
965: if ($@) {
966: &logthis("<font color='red'>save_cache blew up :$@:$name</font>");
967: unlink($filename);
968: last;
969: }
970: }
971: } else {
972: if (-e $filename) {
973: &logthis("Unable to tie hash (save cache): $name ($!)");
974: unlink($filename);
975: }
976: }
977: untie(%hash);
978: flock(DB,LOCK_UN);
979: close(DB);
980: &logthis("save_cache $name took ".(&Time::HiRes::time()-$starttime));
981: }
982: undef(%do_save);
983: undef(%do_save_item);
984:
985: }
986:
987: sub load_cache_item {
988: my ($cache,$name,$id,$time)=@_;
989: if ($disk_caching_disabled) { return; }
990: my $starttime=&Time::HiRes::time();
991: # &logthis("Before Loading $name for $id size is ".scalar(%$cache));
992: my %hash;
993: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
994: if (!-e $filename) { return; }
995: open(DB,">$filename.lock");
996: flock(DB,LOCK_SH);
997: if (tie(%hash,'GDBM_File',$filename,&GDBM_READER(),0640)) {
998: eval <<'EVALBLOCK';
999: if (!%$cache) {
1000: my $count;
1001: while (my ($key,$value)=each(%hash)) {
1002: $count++;
1003: if ($key =~ /\.time$/) {
1004: $$cache{$key}=$value;
1005: } else {
1006: my $hashref=thaw($value);
1007: $$cache{$key}=$hashref->{'item'};
1008: }
1009: }
1010: # &logthis("Initial load: $count");
1011: } else {
1012: if (($$cache{$id.'.time'}+$time) < time) {
1013: $$cache{$id.'.time'}=$hash{$id.'.time'};
1014: {
1015: my $hashref=thaw($hash{$id});
1016: $$cache{$id}=$hashref->{'item'};
1017: }
1018: if (exists($hash{$id.'.file'})) {
1019: my $hashref=thaw($hash{$id.'.file'});
1020: $$cache{$id.'.file'}=$hashref->{'item'};
1021: }
1022: }
1023: }
1024: EVALBLOCK
1025: if ($@) {
1026: &logthis("<font color='red'>load_cache blew up :$@:$name</font>");
1027: unlink($filename);
1028: }
1029: } else {
1030: if (-e $filename) {
1031: &logthis("Unable to tie hash (load cache item): $name ($!)");
1032: unlink($filename);
1033: }
1034: }
1035: untie(%hash);
1036: flock(DB,LOCK_UN);
1037: close(DB);
1038: # &logthis("After Loading $name size is ".scalar(%$cache));
1039: # &logthis("load_cache_item $name took ".(&Time::HiRes::time()-$starttime));
1040: }
1041:
1042: # ------------------------------------- Read an entry from a user's environment
1043:
1044: sub userenvironment {
1045: my ($udom,$unam,@what)=@_;
1046: my %returnhash=();
1047: my @answer=split(/\&/,
1048: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1049: &homeserver($unam,$udom)));
1050: my $i;
1051: for ($i=0;$i<=$#what;$i++) {
1052: $returnhash{$what[$i]}=&unescape($answer[$i]);
1053: }
1054: return %returnhash;
1055: }
1056:
1057: # -------------------------------------------------------------------- New chat
1058:
1059: sub chatsend {
1060: my ($newentry,$anon)=@_;
1061: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1062: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1063: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1064: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1065: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
1066: &escape($newentry)),$chome);
1067: }
1068:
1069: # ------------------------------------------ Find current version of a resource
1070:
1071: sub getversion {
1072: my $fname=&clutter(shift);
1073: unless ($fname=~/^\/res\//) { return -1; }
1074: return ¤tversion(&filelocation('',$fname));
1075: }
1076:
1077: sub currentversion {
1078: my $fname=shift;
1079: my ($result,$cached)=&is_cached(\%resversioncache,$fname,'resversion',600);
1080: if (defined($cached)) { return $result; }
1081: my $author=$fname;
1082: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1083: my ($udom,$uname)=split(/\//,$author);
1084: my $home=homeserver($uname,$udom);
1085: if ($home eq 'no_host') {
1086: return -1;
1087: }
1088: my $answer=reply("currentversion:$fname",$home);
1089: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1090: return -1;
1091: }
1092: return &do_cache(\%resversioncache,$fname,$answer,'resversion');
1093: }
1094:
1095: # ----------------------------- Subscribe to a resource, return URL if possible
1096:
1097: sub subscribe {
1098: my $fname=shift;
1099: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1100: $fname=~s/[\n\r]//g;
1101: my $author=$fname;
1102: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1103: my ($udom,$uname)=split(/\//,$author);
1104: my $home=homeserver($uname,$udom);
1105: if ($home eq 'no_host') {
1106: return 'not_found';
1107: }
1108: my $answer=reply("sub:$fname",$home);
1109: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1110: $answer.=' by '.$home;
1111: }
1112: return $answer;
1113: }
1114:
1115: # -------------------------------------------------------------- Replicate file
1116:
1117: sub repcopy {
1118: my $filename=shift;
1119: $filename=~s/\/+/\//g;
1120: if ($filename=~m|^/home/httpd/html/adm/|) { return OK; }
1121: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return OK; }
1122: if ($filename=~m|^/home/httpd/html/userfiles/| or
1123: $filename=~m|^/*uploaded/|) {
1124: return &repcopy_userfile($filename);
1125: }
1126: $filename=~s/[\n\r]//g;
1127: my $transname="$filename.in.transfer";
1128: if ((-e $filename) || (-e $transname)) { return OK; }
1129: my $remoteurl=subscribe($filename);
1130: if ($remoteurl =~ /^con_lost by/) {
1131: &logthis("Subscribe returned $remoteurl: $filename");
1132: return HTTP_SERVICE_UNAVAILABLE;
1133: } elsif ($remoteurl eq 'not_found') {
1134: #&logthis("Subscribe returned not_found: $filename");
1135: return HTTP_NOT_FOUND;
1136: } elsif ($remoteurl =~ /^rejected by/) {
1137: &logthis("Subscribe returned $remoteurl: $filename");
1138: return FORBIDDEN;
1139: } elsif ($remoteurl eq 'directory') {
1140: return OK;
1141: } else {
1142: my $author=$filename;
1143: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1144: my ($udom,$uname)=split(/\//,$author);
1145: my $home=homeserver($uname,$udom);
1146: unless ($home eq $perlvar{'lonHostID'}) {
1147: my @parts=split(/\//,$filename);
1148: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1149: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1150: &logthis("Malconfiguration for replication: $filename");
1151: return HTTP_BAD_REQUEST;
1152: }
1153: my $count;
1154: for ($count=5;$count<$#parts;$count++) {
1155: $path.="/$parts[$count]";
1156: if ((-e $path)!=1) {
1157: mkdir($path,0777);
1158: }
1159: }
1160: my $ua=new LWP::UserAgent;
1161: my $request=new HTTP::Request('GET',"$remoteurl");
1162: my $response=$ua->request($request,$transname);
1163: if ($response->is_error()) {
1164: unlink($transname);
1165: my $message=$response->status_line;
1166: &logthis("<font color=blue>WARNING:"
1167: ." LWP get: $message: $filename</font>");
1168: return HTTP_SERVICE_UNAVAILABLE;
1169: } else {
1170: if ($remoteurl!~/\.meta$/) {
1171: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1172: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1173: if ($mresponse->is_error()) {
1174: unlink($filename.'.meta');
1175: &logthis(
1176: "<font color=yellow>INFO: No metadata: $filename</font>");
1177: }
1178: }
1179: rename($transname,$filename);
1180: return OK;
1181: }
1182: }
1183: }
1184: }
1185:
1186: # ------------------------------------------------ Get server side include body
1187: sub ssi_body {
1188: my ($filelink,%form)=@_;
1189: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1190: &ssi($filelink,%form));
1191: $output=~
1192: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
1193: $output=~s/^.*?\<body[^\>]*\>//si;
1194: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1195: return $output;
1196: }
1197:
1198: # --------------------------------------------------------- Server Side Include
1199:
1200: sub ssi {
1201:
1202: my ($fn,%form)=@_;
1203:
1204: my $ua=new LWP::UserAgent;
1205:
1206: my $request;
1207:
1208: if (%form) {
1209: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1210: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1211: } else {
1212: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1213: }
1214:
1215: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1216: my $response=$ua->request($request);
1217:
1218: return $response->content;
1219: }
1220:
1221: sub externalssi {
1222: my ($url)=@_;
1223: my $ua=new LWP::UserAgent;
1224: my $request=new HTTP::Request('GET',$url);
1225: my $response=$ua->request($request);
1226: return $response->content;
1227: }
1228:
1229: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1230:
1231: sub allowuploaded {
1232: my ($srcurl,$url)=@_;
1233: $url=&clutter(&declutter($url));
1234: my $dir=$url;
1235: $dir=~s/\/[^\/]+$//;
1236: my %httpref=();
1237: my $httpurl=&hreflocation('',$url);
1238: $httpref{'httpref.'.$httpurl}=$srcurl;
1239: &Apache::lonnet::appenv(%httpref);
1240: }
1241:
1242: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1243: # input: action, courseID, current domain, home server for course, intended
1244: # path to file, source of file.
1245: # output: url to file (if action was uploaddoc),
1246: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1247: #
1248: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1249: # course.
1250: #
1251: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1252: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1253: # course's home server.
1254: #
1255: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1256: # be copied from $source (current location) to
1257: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1258: # and will then be copied to
1259: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1260: # course's home server.
1261: #
1262: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1263: # will be retrived from $ENV{form.uploaddoc} (from DOCS interface) to
1264: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1265: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1266: # in course's home server.
1267:
1268:
1269: sub process_coursefile {
1270: my ($action,$docuname,$docudom,$docuhome,$file,$source)=@_;
1271: my $fetchresult;
1272: if ($action eq 'propagate') {
1273: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file
1274: ,$docuhome);
1275: } else {
1276: my $fetchresult = '';
1277: my $fpath = '';
1278: my $fname = $file;
1279: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1280: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1281: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1282: unless ($fpath eq '') {
1283: my @parts=split('/',$fpath);
1284: foreach my $part (@parts) {
1285: $filepath.= '/'.$part;
1286: if ((-e $filepath)!=1) {
1287: mkdir($filepath,0777);
1288: }
1289: }
1290: }
1291: if ($action eq 'copy') {
1292: if ($source eq '') {
1293: $fetchresult = 'no source file';
1294: return $fetchresult;
1295: } else {
1296: my $destination = $filepath.'/'.$fname;
1297: rename($source,$destination);
1298: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1299: $docuhome);
1300: }
1301: } elsif ($action eq 'uploaddoc') {
1302: open(my $fh,'>'.$filepath.'/'.$fname);
1303: print $fh $ENV{'form.'.$source};
1304: close($fh);
1305: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1306: $docuhome);
1307: if ($fetchresult eq 'ok') {
1308: return '/uploaded/'.$fpath.'/'.$fname;
1309: } else {
1310: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1311: ' to host '.$docuhome.': '.$fetchresult);
1312: return '/adm/notfound.html';
1313: }
1314: }
1315: }
1316: unless ( $fetchresult eq 'ok') {
1317: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1318: ' to host '.$docuhome.': '.$fetchresult);
1319: }
1320: return $fetchresult;
1321: }
1322:
1323: # --------------- Take an uploaded file and put it into the userfiles directory
1324: # input: name of form element, coursedoc=1 means this is for the course
1325: # output: url of file in userspace
1326:
1327: sub clean_filename {
1328: my ($fname)=@_;
1329: # Replace Windows backslashes by forward slashes
1330: $fname=~s/\\/\//g;
1331: # Get rid of everything but the actual filename
1332: $fname=~s/^.*\/([^\/]+)$/$1/;
1333: # Replace spaces by underscores
1334: $fname=~s/\s+/\_/g;
1335: # Replace all other weird characters by nothing
1336: $fname=~s/[^\w\.\-]//g;
1337: # Replace all .\d. sequences with _\d. so they no longer look like version
1338: # numbers
1339: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1340: return $fname;
1341: }
1342:
1343: sub userfileupload {
1344: my ($formname,$coursedoc,$subdir)=@_;
1345: if (!defined($subdir)) { $subdir='unknown'; }
1346: my $fname=$ENV{'form.'.$formname.'.filename'};
1347: $fname=&clean_filename($fname);
1348: # See if there is anything left
1349: unless ($fname) { return 'error: no uploaded file'; }
1350: chop($ENV{'form.'.$formname});
1351: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1352: my $now = time;
1353: my $filepath = 'tmp/helprequests/'.$now;
1354: my @parts=split(/\//,$filepath);
1355: my $fullpath = $perlvar{'lonDaemons'};
1356: for (my $i=0;$i<@parts;$i++) {
1357: $fullpath .= '/'.$parts[$i];
1358: if ((-e $fullpath)!=1) {
1359: mkdir($fullpath,0777);
1360: }
1361: }
1362: open(my $fh,'>'.$fullpath.'/'.$fname);
1363: print $fh $ENV{'form.'.$formname};
1364: close($fh);
1365: return $fullpath.'/'.$fname;
1366: }
1367: # Create the directory if not present
1368: my $docuname='';
1369: my $docudom='';
1370: my $docuhome='';
1371: $fname="$subdir/$fname";
1372: if ($coursedoc) {
1373: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1374: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1375: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1376: if ($ENV{'form.folder'} =~ m/^default/) {
1377: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1378: } else {
1379: $fname=$ENV{'form.folder'}.'/'.$fname;
1380: return &process_coursefile('uploaddoc',$docuname,$docudom,$docuhome,$fname,$formname);
1381: }
1382: } else {
1383: $docuname=$ENV{'user.name'};
1384: $docudom=$ENV{'user.domain'};
1385: $docuhome=$ENV{'user.home'};
1386: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1387: }
1388: }
1389:
1390: sub finishuserfileupload {
1391: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1392: my $path=$docudom.'/'.$docuname.'/';
1393: my $filepath=$perlvar{'lonDocRoot'};
1394: my ($fnamepath,$file);
1395: $file=$fname;
1396: if ($fname=~m|/|) {
1397: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1398: $path.=$fnamepath.'/';
1399: }
1400: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1401: my $count;
1402: for ($count=4;$count<=$#parts;$count++) {
1403: $filepath.="/$parts[$count]";
1404: if ((-e $filepath)!=1) {
1405: mkdir($filepath,0777);
1406: }
1407: }
1408: # Save the file
1409: {
1410: #&Apache::lonnet::logthis("Saving to $filepath $file");
1411: open(my $fh,'>'.$filepath.'/'.$file);
1412: print $fh $ENV{'form.'.$formname};
1413: close($fh);
1414: }
1415: # Notify homeserver to grep it
1416: #
1417: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1418: if ($fetchresult eq 'ok') {
1419: #
1420: # Return the URL to it
1421: return '/uploaded/'.$path.$file;
1422: } else {
1423: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1424: ': '.$fetchresult);
1425: return '/adm/notfound.html';
1426: }
1427: }
1428:
1429: sub removeuploadedurl {
1430: my ($url)=@_;
1431: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1432: return &Apache::lonnet::removeuserfile($uname,$udom,$fname);
1433: }
1434:
1435: sub removeuserfile {
1436: my ($docuname,$docudom,$fname)=@_;
1437: my $home=&homeserver($docuname,$docudom);
1438: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1439: }
1440:
1441: sub mkdiruserfile {
1442: my ($docuname,$docudom,$dir)=@_;
1443: my $home=&homeserver($docuname,$docudom);
1444: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1445: }
1446:
1447: sub renameuserfile {
1448: my ($docuname,$docudom,$old,$new)=@_;
1449: my $home=&homeserver($docuname,$docudom);
1450: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1451: &escape("$new"),$home);
1452: }
1453:
1454: # ------------------------------------------------------------------------- Log
1455:
1456: sub log {
1457: my ($dom,$nam,$hom,$what)=@_;
1458: return critical("log:$dom:$nam:$what",$hom);
1459: }
1460:
1461: # ------------------------------------------------------------------ Course Log
1462: #
1463: # This routine flushes several buffers of non-mission-critical nature
1464: #
1465:
1466: sub flushcourselogs {
1467: &logthis('Flushing log buffers');
1468: #
1469: # course logs
1470: # This is a log of all transactions in a course, which can be used
1471: # for data mining purposes
1472: #
1473: # It also collects the courseid database, which lists last transaction
1474: # times and course titles for all courseids
1475: #
1476: my %courseidbuffer=();
1477: foreach (keys %courselogs) {
1478: my $crsid=$_;
1479: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1480: &escape($courselogs{$crsid}),
1481: $coursehombuf{$crsid}) eq 'ok') {
1482: delete $courselogs{$crsid};
1483: } else {
1484: &logthis('Failed to flush log buffer for '.$crsid);
1485: if (length($courselogs{$crsid})>40000) {
1486: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1487: " exceeded maximum size, deleting.</font>");
1488: delete $courselogs{$crsid};
1489: }
1490: }
1491: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1492: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1493: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1494: '='.&escape($courseinstcodebuf{$crsid});
1495: } else {
1496: $courseidbuffer{$coursehombuf{$crsid}}=
1497: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1498: '='.&escape($courseinstcodebuf{$crsid});
1499: }
1500: }
1501: #
1502: # Write course id database (reverse lookup) to homeserver of courses
1503: # Is used in pickcourse
1504: #
1505: foreach (keys %courseidbuffer) {
1506: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1507: }
1508: #
1509: # File accesses
1510: # Writes to the dynamic metadata of resources to get hit counts, etc.
1511: #
1512: foreach my $entry (keys(%accesshash)) {
1513: if ($entry =~ /___count$/) {
1514: my ($dom,$name);
1515: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1516: if (! defined($dom) || $dom eq '' ||
1517: ! defined($name) || $name eq '') {
1518: my $cid = $ENV{'request.course.id'};
1519: $dom = $ENV{'request.'.$cid.'.domain'};
1520: $name = $ENV{'request.'.$cid.'.num'};
1521: }
1522: my $value = $accesshash{$entry};
1523: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1524: my %temphash=($url => $value);
1525: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1526: if ($result eq 'ok') {
1527: delete $accesshash{$entry};
1528: } elsif ($result eq 'unknown_cmd') {
1529: # Target server has old code running on it.
1530: my %temphash=($entry => $value);
1531: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1532: delete $accesshash{$entry};
1533: }
1534: }
1535: } else {
1536: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1537: my %temphash=($entry => $accesshash{$entry});
1538: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1539: delete $accesshash{$entry};
1540: }
1541: }
1542: }
1543: #
1544: # Roles
1545: # Reverse lookup of user roles for course faculty/staff and co-authorship
1546: #
1547: foreach (keys %userrolehash) {
1548: my $entry=$_;
1549: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1550: split(/\:/,$entry);
1551: if (&Apache::lonnet::put('nohist_userroles',
1552: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1553: $rudom,$runame) eq 'ok') {
1554: delete $userrolehash{$entry};
1555: }
1556: }
1557: $dumpcount++;
1558: }
1559:
1560: sub courselog {
1561: my $what=shift;
1562: $what=time.':'.$what;
1563: unless ($ENV{'request.course.id'}) { return ''; }
1564: $coursedombuf{$ENV{'request.course.id'}}=
1565: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1566: $coursenumbuf{$ENV{'request.course.id'}}=
1567: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1568: $coursehombuf{$ENV{'request.course.id'}}=
1569: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1570: $coursedescrbuf{$ENV{'request.course.id'}}=
1571: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1572: $courseinstcodebuf{$ENV{'request.course.id'}}=
1573: $ENV{'course.'.$ENV{'request.course.id'}.'.internal.coursecode'};
1574: if (defined $courselogs{$ENV{'request.course.id'}}) {
1575: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1576: } else {
1577: $courselogs{$ENV{'request.course.id'}}.=$what;
1578: }
1579: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1580: &flushcourselogs();
1581: }
1582: }
1583:
1584: sub courseacclog {
1585: my $fnsymb=shift;
1586: unless ($ENV{'request.course.id'}) { return ''; }
1587: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1588: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1589: $what.=':POST';
1590: foreach (keys %ENV) {
1591: if ($_=~/^form\.(.*)/) {
1592: $what.=':'.$1.'='.$ENV{$_};
1593: }
1594: }
1595: }
1596: &courselog($what);
1597: }
1598:
1599: sub countacc {
1600: my $url=&declutter(shift);
1601: return if (! defined($url) || $url eq '');
1602: unless ($ENV{'request.course.id'}) { return ''; }
1603: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1604: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1605: $accesshash{$key}++;
1606: }
1607:
1608: sub linklog {
1609: my ($from,$to)=@_;
1610: $from=&declutter($from);
1611: $to=&declutter($to);
1612: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1613: $accesshash{$to.'___'.$from.'___goto'}=1;
1614: }
1615:
1616: sub userrolelog {
1617: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1618: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1619: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1620: ($trole=~/^cr/) || ($trole=~/^ta/)) {
1621: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1622: $userrolehash
1623: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1624: =$tend.':'.$tstart;
1625: }
1626: }
1627:
1628: sub get_course_adv_roles {
1629: my $cid=shift;
1630: $cid=$ENV{'request.course.id'} unless (defined($cid));
1631: my %coursehash=&coursedescription($cid);
1632: my %nothide=();
1633: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1634: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1635: }
1636: my %returnhash=();
1637: my %dumphash=
1638: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1639: my $now=time;
1640: foreach (keys %dumphash) {
1641: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1642: if (($tstart) && ($tstart<0)) { next; }
1643: if (($tend) && ($tend<$now)) { next; }
1644: if (($tstart) && ($now<$tstart)) { next; }
1645: my ($role,$username,$domain,$section)=split(/\:/,$_);
1646: if ((&privileged($username,$domain)) &&
1647: (!$nothide{$username.':'.$domain})) { next; }
1648: my $key=&plaintext($role);
1649: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1650: if ($returnhash{$key}) {
1651: $returnhash{$key}.=','.$username.':'.$domain;
1652: } else {
1653: $returnhash{$key}=$username.':'.$domain;
1654: }
1655: }
1656: return %returnhash;
1657: }
1658:
1659: sub get_my_roles {
1660: my ($uname,$udom)=@_;
1661: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1662: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1663: my %dumphash=
1664: &dump('nohist_userroles',$udom,$uname);
1665: my %returnhash=();
1666: my $now=time;
1667: foreach (keys %dumphash) {
1668: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1669: if (($tstart) && ($tstart<0)) { next; }
1670: if (($tend) && ($tend<$now)) { next; }
1671: if (($tstart) && ($now<$tstart)) { next; }
1672: my ($role,$username,$domain,$section)=split(/\:/,$_);
1673: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1674: }
1675: return %returnhash;
1676: }
1677:
1678: # ----------------------------------------------------- Frontpage Announcements
1679: #
1680: #
1681:
1682: sub postannounce {
1683: my ($server,$text)=@_;
1684: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1685: unless ($text=~/\w/) { $text=''; }
1686: return &reply('setannounce:'.&escape($text),$server);
1687: }
1688:
1689: sub getannounce {
1690:
1691: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1692: my $announcement='';
1693: while (<$fh>) { $announcement .=$_; }
1694: close($fh);
1695: if ($announcement=~/\w/) {
1696: return
1697: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1698: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1699: } else {
1700: return '';
1701: }
1702: } else {
1703: return '';
1704: }
1705: }
1706:
1707: # ---------------------------------------------------------- Course ID routines
1708: # Deal with domain's nohist_courseid.db files
1709: #
1710:
1711: sub courseidput {
1712: my ($domain,$what,$coursehome)=@_;
1713: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1714: }
1715:
1716: sub courseiddump {
1717: my ($domfilter,$descfilter,$sincefilter,$hostidflag,$hostidref)=@_;
1718: my %returnhash=();
1719: unless ($domfilter) { $domfilter=''; }
1720: foreach my $tryserver (keys %libserv) {
1721: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1722: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1723: foreach (
1724: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1725: $sincefilter.':'.&escape($descfilter),
1726: $tryserver))) {
1727: my ($key,$value)=split(/\=/,$_);
1728: if (($key) && ($value)) {
1729: $returnhash{&unescape($key)}=$value;
1730: }
1731: }
1732: }
1733: }
1734: }
1735: return %returnhash;
1736: }
1737:
1738: #
1739: # ----------------------------------------------------------- Check out an item
1740:
1741: sub get_first_access {
1742: my ($type,$argsymb)=@_;
1743: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1744: if ($argsymb) { $symb=$argsymb; }
1745: my ($map,$id,$res)=&decode_symb($symb);
1746: if ($type eq 'map') { $res=$map; }
1747: my %times=&get('firstaccesstimes',[$res],$udom,$uname);
1748: return $times{$res};
1749: }
1750:
1751: sub set_first_access {
1752: my ($type)=@_;
1753: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1754: my ($map,$id,$res)=&decode_symb($symb);
1755: if ($type eq 'map') { $res=$map; }
1756: my $firstaccess=&get_first_access($type);
1757: if (!$firstaccess) {
1758: return &put('firstaccesstimes',{$res=>time},$udom,$uname);
1759: }
1760: return 'already_set';
1761: }
1762:
1763: sub checkout {
1764: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1765: my $now=time;
1766: my $lonhost=$perlvar{'lonHostID'};
1767: my $infostr=&escape(
1768: 'CHECKOUTTOKEN&'.
1769: $tuname.'&'.
1770: $tudom.'&'.
1771: $tcrsid.'&'.
1772: $symb.'&'.
1773: $now.'&'.$ENV{'REMOTE_ADDR'});
1774: my $token=&reply('tmpput:'.$infostr,$lonhost);
1775: if ($token=~/^error\:/) {
1776: &logthis("<font color=blue>WARNING: ".
1777: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1778: "</font>");
1779: return '';
1780: }
1781:
1782: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1783: $token=~tr/a-z/A-Z/;
1784:
1785: my %infohash=('resource.0.outtoken' => $token,
1786: 'resource.0.checkouttime' => $now,
1787: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1788:
1789: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1790: return '';
1791: } else {
1792: &logthis("<font color=blue>WARNING: ".
1793: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1794: "</font>");
1795: }
1796:
1797: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1798: &escape('Checkout '.$infostr.' - '.
1799: $token)) ne 'ok') {
1800: return '';
1801: } else {
1802: &logthis("<font color=blue>WARNING: ".
1803: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1804: "</font>");
1805: }
1806: return $token;
1807: }
1808:
1809: # ------------------------------------------------------------ Check in an item
1810:
1811: sub checkin {
1812: my $token=shift;
1813: my $now=time;
1814: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1815: $lonhost=~tr/A-Z/a-z/;
1816: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1817: $dtoken=~s/\W/\_/g;
1818: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1819: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1820:
1821: unless (($tuname) && ($tudom)) {
1822: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1823: return '';
1824: }
1825:
1826: unless (&allowed('mgr',$tcrsid)) {
1827: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1828: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1829: return '';
1830: }
1831:
1832: my %infohash=('resource.0.intoken' => $token,
1833: 'resource.0.checkintime' => $now,
1834: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1835:
1836: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1837: return '';
1838: }
1839:
1840: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1841: &escape('Checkin - '.$token)) ne 'ok') {
1842: return '';
1843: }
1844:
1845: return ($symb,$tuname,$tudom,$tcrsid);
1846: }
1847:
1848: # --------------------------------------------- Set Expire Date for Spreadsheet
1849:
1850: sub expirespread {
1851: my ($uname,$udom,$stype,$usymb)=@_;
1852: my $cid=$ENV{'request.course.id'};
1853: if ($cid) {
1854: my $now=time;
1855: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1856: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1857: $ENV{'course.'.$cid.'.num'}.
1858: ':nohist_expirationdates:'.
1859: &escape($key).'='.$now,
1860: $ENV{'course.'.$cid.'.home'})
1861: }
1862: return 'ok';
1863: }
1864:
1865: # ----------------------------------------------------- Devalidate Spreadsheets
1866:
1867: sub devalidate {
1868: my ($symb,$uname,$udom)=@_;
1869: my $cid=$ENV{'request.course.id'};
1870: if ($cid) {
1871: # delete the stored spreadsheets for
1872: # - the student level sheet of this user in course's homespace
1873: # - the assessment level sheet for this resource
1874: # for this user in user's homespace
1875: # - current conditional state info
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: &delenv('user.state.'.$cid);
1891: }
1892: }
1893:
1894: sub get_scalar {
1895: my ($string,$end) = @_;
1896: my $value;
1897: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1898: $value = $1;
1899: } elsif ($$string =~ s/^([^&]*?)&//) {
1900: $value = $1;
1901: }
1902: return &unescape($value);
1903: }
1904:
1905: sub array2str {
1906: my (@array) = @_;
1907: my $result=&arrayref2str(\@array);
1908: $result=~s/^__ARRAY_REF__//;
1909: $result=~s/__END_ARRAY_REF__$//;
1910: return $result;
1911: }
1912:
1913: sub arrayref2str {
1914: my ($arrayref) = @_;
1915: my $result='__ARRAY_REF__';
1916: foreach my $elem (@$arrayref) {
1917: if(ref($elem) eq 'ARRAY') {
1918: $result.=&arrayref2str($elem).'&';
1919: } elsif(ref($elem) eq 'HASH') {
1920: $result.=&hashref2str($elem).'&';
1921: } elsif(ref($elem)) {
1922: #print("Got a ref of ".(ref($elem))." skipping.");
1923: } else {
1924: $result.=&escape($elem).'&';
1925: }
1926: }
1927: $result=~s/\&$//;
1928: $result .= '__END_ARRAY_REF__';
1929: return $result;
1930: }
1931:
1932: sub hash2str {
1933: my (%hash) = @_;
1934: my $result=&hashref2str(\%hash);
1935: $result=~s/^__HASH_REF__//;
1936: $result=~s/__END_HASH_REF__$//;
1937: return $result;
1938: }
1939:
1940: sub hashref2str {
1941: my ($hashref)=@_;
1942: my $result='__HASH_REF__';
1943: foreach (sort(keys(%$hashref))) {
1944: if (ref($_) eq 'ARRAY') {
1945: $result.=&arrayref2str($_).'=';
1946: } elsif (ref($_) eq 'HASH') {
1947: $result.=&hashref2str($_).'=';
1948: } elsif (ref($_)) {
1949: $result.='=';
1950: #print("Got a ref of ".(ref($_))." skipping.");
1951: } else {
1952: if ($_) {$result.=&escape($_).'=';} else { last; }
1953: }
1954:
1955: if(ref($hashref->{$_}) eq 'ARRAY') {
1956: $result.=&arrayref2str($hashref->{$_}).'&';
1957: } elsif(ref($hashref->{$_}) eq 'HASH') {
1958: $result.=&hashref2str($hashref->{$_}).'&';
1959: } elsif(ref($hashref->{$_})) {
1960: $result.='&';
1961: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1962: } else {
1963: $result.=&escape($hashref->{$_}).'&';
1964: }
1965: }
1966: $result=~s/\&$//;
1967: $result .= '__END_HASH_REF__';
1968: return $result;
1969: }
1970:
1971: sub str2hash {
1972: my ($string)=@_;
1973: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1974: return %$hash;
1975: }
1976:
1977: sub str2hashref {
1978: my ($string) = @_;
1979:
1980: my %hash;
1981:
1982: if($string !~ /^__HASH_REF__/) {
1983: if (! ($string eq '' || !defined($string))) {
1984: $hash{'error'}='Not hash reference';
1985: }
1986: return (\%hash, $string);
1987: }
1988:
1989: $string =~ s/^__HASH_REF__//;
1990:
1991: while($string !~ /^__END_HASH_REF__/) {
1992: #key
1993: my $key='';
1994: if($string =~ /^__HASH_REF__/) {
1995: ($key, $string)=&str2hashref($string);
1996: if(defined($key->{'error'})) {
1997: $hash{'error'}='Bad data';
1998: return (\%hash, $string);
1999: }
2000: } elsif($string =~ /^__ARRAY_REF__/) {
2001: ($key, $string)=&str2arrayref($string);
2002: if($key->[0] eq 'Array reference error') {
2003: $hash{'error'}='Bad data';
2004: return (\%hash, $string);
2005: }
2006: } else {
2007: $string =~ s/^(.*?)=//;
2008: $key=&unescape($1);
2009: }
2010: $string =~ s/^=//;
2011:
2012: #value
2013: my $value='';
2014: if($string =~ /^__HASH_REF__/) {
2015: ($value, $string)=&str2hashref($string);
2016: if(defined($value->{'error'})) {
2017: $hash{'error'}='Bad data';
2018: return (\%hash, $string);
2019: }
2020: } elsif($string =~ /^__ARRAY_REF__/) {
2021: ($value, $string)=&str2arrayref($string);
2022: if($value->[0] eq 'Array reference error') {
2023: $hash{'error'}='Bad data';
2024: return (\%hash, $string);
2025: }
2026: } else {
2027: $value=&get_scalar(\$string,'__END_HASH_REF__');
2028: }
2029: $string =~ s/^&//;
2030:
2031: $hash{$key}=$value;
2032: }
2033:
2034: $string =~ s/^__END_HASH_REF__//;
2035:
2036: return (\%hash, $string);
2037: }
2038:
2039: sub str2array {
2040: my ($string)=@_;
2041: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2042: return @$array;
2043: }
2044:
2045: sub str2arrayref {
2046: my ($string) = @_;
2047: my @array;
2048:
2049: if($string !~ /^__ARRAY_REF__/) {
2050: if (! ($string eq '' || !defined($string))) {
2051: $array[0]='Array reference error';
2052: }
2053: return (\@array, $string);
2054: }
2055:
2056: $string =~ s/^__ARRAY_REF__//;
2057:
2058: while($string !~ /^__END_ARRAY_REF__/) {
2059: my $value='';
2060: if($string =~ /^__HASH_REF__/) {
2061: ($value, $string)=&str2hashref($string);
2062: if(defined($value->{'error'})) {
2063: $array[0] ='Array reference error';
2064: return (\@array, $string);
2065: }
2066: } elsif($string =~ /^__ARRAY_REF__/) {
2067: ($value, $string)=&str2arrayref($string);
2068: if($value->[0] eq 'Array reference error') {
2069: $array[0] ='Array reference error';
2070: return (\@array, $string);
2071: }
2072: } else {
2073: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2074: }
2075: $string =~ s/^&//;
2076:
2077: push(@array, $value);
2078: }
2079:
2080: $string =~ s/^__END_ARRAY_REF__//;
2081:
2082: return (\@array, $string);
2083: }
2084:
2085: # -------------------------------------------------------------------Temp Store
2086:
2087: sub tmpreset {
2088: my ($symb,$namespace,$domain,$stuname) = @_;
2089: if (!$symb) {
2090: $symb=&symbread();
2091: if (!$symb) { $symb= $ENV{'request.url'}; }
2092: }
2093: $symb=escape($symb);
2094:
2095: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2096: $namespace=~s/\//\_/g;
2097: $namespace=~s/\W//g;
2098:
2099: #FIXME needs to do something for /pub resources
2100: if (!$domain) { $domain=$ENV{'user.domain'}; }
2101: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2102: my $path=$perlvar{'lonDaemons'}.'/tmp';
2103: my %hash;
2104: if (tie(%hash,'GDBM_File',
2105: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2106: &GDBM_WRCREAT(),0640)) {
2107: foreach my $key (keys %hash) {
2108: if ($key=~ /:$symb/) {
2109: delete($hash{$key});
2110: }
2111: }
2112: }
2113: }
2114:
2115: sub tmpstore {
2116: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2117:
2118: if (!$symb) {
2119: $symb=&symbread();
2120: if (!$symb) { $symb= $ENV{'request.url'}; }
2121: }
2122: $symb=escape($symb);
2123:
2124: if (!$namespace) {
2125: # I don't think we would ever want to store this for a course.
2126: # it seems this will only be used if we don't have a course.
2127: #$namespace=$ENV{'request.course.id'};
2128: #if (!$namespace) {
2129: $namespace=$ENV{'request.state'};
2130: #}
2131: }
2132: $namespace=~s/\//\_/g;
2133: $namespace=~s/\W//g;
2134: #FIXME needs to do something for /pub resources
2135: if (!$domain) { $domain=$ENV{'user.domain'}; }
2136: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2137: my $now=time;
2138: my %hash;
2139: my $path=$perlvar{'lonDaemons'}.'/tmp';
2140: if (tie(%hash,'GDBM_File',
2141: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2142: &GDBM_WRCREAT(),0640)) {
2143: $hash{"version:$symb"}++;
2144: my $version=$hash{"version:$symb"};
2145: my $allkeys='';
2146: foreach my $key (keys(%$storehash)) {
2147: $allkeys.=$key.':';
2148: $hash{"$version:$symb:$key"}=$$storehash{$key};
2149: }
2150: $hash{"$version:$symb:timestamp"}=$now;
2151: $allkeys.='timestamp';
2152: $hash{"$version:keys:$symb"}=$allkeys;
2153: if (untie(%hash)) {
2154: return 'ok';
2155: } else {
2156: return "error:$!";
2157: }
2158: } else {
2159: return "error:$!";
2160: }
2161: }
2162:
2163: # -----------------------------------------------------------------Temp Restore
2164:
2165: sub tmprestore {
2166: my ($symb,$namespace,$domain,$stuname) = @_;
2167:
2168: if (!$symb) {
2169: $symb=&symbread();
2170: if (!$symb) { $symb= $ENV{'request.url'}; }
2171: }
2172: $symb=escape($symb);
2173:
2174: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2175: #FIXME needs to do something for /pub resources
2176: if (!$domain) { $domain=$ENV{'user.domain'}; }
2177: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2178:
2179: my %returnhash;
2180: $namespace=~s/\//\_/g;
2181: $namespace=~s/\W//g;
2182: my %hash;
2183: my $path=$perlvar{'lonDaemons'}.'/tmp';
2184: if (tie(%hash,'GDBM_File',
2185: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2186: &GDBM_READER(),0640)) {
2187: my $version=$hash{"version:$symb"};
2188: $returnhash{'version'}=$version;
2189: my $scope;
2190: for ($scope=1;$scope<=$version;$scope++) {
2191: my $vkeys=$hash{"$scope:keys:$symb"};
2192: my @keys=split(/:/,$vkeys);
2193: my $key;
2194: $returnhash{"$scope:keys"}=$vkeys;
2195: foreach $key (@keys) {
2196: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
2197: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
2198: }
2199: }
2200: if (!(untie(%hash))) {
2201: return "error:$!";
2202: }
2203: } else {
2204: return "error:$!";
2205: }
2206: return %returnhash;
2207: }
2208:
2209: # ----------------------------------------------------------------------- Store
2210:
2211: sub store {
2212: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2213: my $home='';
2214:
2215: if ($stuname) { $home=&homeserver($stuname,$domain); }
2216:
2217: $symb=&symbclean($symb);
2218: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2219:
2220: if (!$domain) { $domain=$ENV{'user.domain'}; }
2221: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2222:
2223: &devalidate($symb,$stuname,$domain);
2224:
2225: $symb=escape($symb);
2226: if (!$namespace) {
2227: unless ($namespace=$ENV{'request.course.id'}) {
2228: return '';
2229: }
2230: }
2231: if (!$home) { $home=$ENV{'user.home'}; }
2232:
2233: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2234: $$storehash{'host'}=$perlvar{'lonHostID'};
2235:
2236: my $namevalue='';
2237: foreach (keys %$storehash) {
2238: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2239: }
2240: $namevalue=~s/\&$//;
2241: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2242: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2243: }
2244:
2245: # -------------------------------------------------------------- Critical Store
2246:
2247: sub cstore {
2248: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2249: my $home='';
2250:
2251: if ($stuname) { $home=&homeserver($stuname,$domain); }
2252:
2253: $symb=&symbclean($symb);
2254: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2255:
2256: if (!$domain) { $domain=$ENV{'user.domain'}; }
2257: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2258:
2259: &devalidate($symb,$stuname,$domain);
2260:
2261: $symb=escape($symb);
2262: if (!$namespace) {
2263: unless ($namespace=$ENV{'request.course.id'}) {
2264: return '';
2265: }
2266: }
2267: if (!$home) { $home=$ENV{'user.home'}; }
2268:
2269: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2270: $$storehash{'host'}=$perlvar{'lonHostID'};
2271:
2272: my $namevalue='';
2273: foreach (keys %$storehash) {
2274: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2275: }
2276: $namevalue=~s/\&$//;
2277: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2278: return critical
2279: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2280: }
2281:
2282: # --------------------------------------------------------------------- Restore
2283:
2284: sub restore {
2285: my ($symb,$namespace,$domain,$stuname) = @_;
2286: my $home='';
2287:
2288: if ($stuname) { $home=&homeserver($stuname,$domain); }
2289:
2290: if (!$symb) {
2291: unless ($symb=escape(&symbread())) { return ''; }
2292: } else {
2293: $symb=&escape(&symbclean($symb));
2294: }
2295: if (!$namespace) {
2296: unless ($namespace=$ENV{'request.course.id'}) {
2297: return '';
2298: }
2299: }
2300: if (!$domain) { $domain=$ENV{'user.domain'}; }
2301: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2302: if (!$home) { $home=$ENV{'user.home'}; }
2303: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2304:
2305: my %returnhash=();
2306: foreach (split(/\&/,$answer)) {
2307: my ($name,$value)=split(/\=/,$_);
2308: $returnhash{&unescape($name)}=&unescape($value);
2309: }
2310: my $version;
2311: for ($version=1;$version<=$returnhash{'version'};$version++) {
2312: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2313: $returnhash{$_}=$returnhash{$version.':'.$_};
2314: }
2315: }
2316: return %returnhash;
2317: }
2318:
2319: # ---------------------------------------------------------- Course Description
2320:
2321: sub coursedescription {
2322: my $courseid=shift;
2323: $courseid=~s/^\///;
2324: $courseid=~s/\_/\//g;
2325: my ($cdomain,$cnum)=split(/\//,$courseid);
2326: my $chome=&homeserver($cnum,$cdomain);
2327: my $normalid=$cdomain.'_'.$cnum;
2328: # need to always cache even if we get errors otherwise we keep
2329: # trying and trying and trying to get the course description.
2330: my %envhash=();
2331: my %returnhash=();
2332: $envhash{'course.'.$normalid.'.last_cache'}=time;
2333: if ($chome ne 'no_host') {
2334: %returnhash=&dump('environment',$cdomain,$cnum);
2335: if (!exists($returnhash{'con_lost'})) {
2336: $returnhash{'home'}= $chome;
2337: $returnhash{'domain'} = $cdomain;
2338: $returnhash{'num'} = $cnum;
2339: while (my ($name,$value) = each %returnhash) {
2340: $envhash{'course.'.$normalid.'.'.$name}=$value;
2341: }
2342: $returnhash{'url'}=&clutter($returnhash{'url'});
2343: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2344: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
2345: $envhash{'course.'.$normalid.'.home'}=$chome;
2346: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2347: $envhash{'course.'.$normalid.'.num'}=$cnum;
2348: }
2349: }
2350: &appenv(%envhash);
2351: return %returnhash;
2352: }
2353:
2354: # -------------------------------------------------See if a user is privileged
2355:
2356: sub privileged {
2357: my ($username,$domain)=@_;
2358: my $rolesdump=&reply("dump:$domain:$username:roles",
2359: &homeserver($username,$domain));
2360: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2361: my $now=time;
2362: if ($rolesdump ne '') {
2363: foreach (split(/&/,$rolesdump)) {
2364: if ($_!~/^rolesdef\&/) {
2365: my ($area,$role)=split(/=/,$_);
2366: $area=~s/\_\w\w$//;
2367: my ($trole,$tend,$tstart)=split(/_/,$role);
2368: if (($trole eq 'dc') || ($trole eq 'su')) {
2369: my $active=1;
2370: if ($tend) {
2371: if ($tend<$now) { $active=0; }
2372: }
2373: if ($tstart) {
2374: if ($tstart>$now) { $active=0; }
2375: }
2376: if ($active) { return 1; }
2377: }
2378: }
2379: }
2380: }
2381: return 0;
2382: }
2383:
2384: # -------------------------------------------------------- Get user privileges
2385:
2386: sub rolesinit {
2387: my ($domain,$username,$authhost)=@_;
2388: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2389: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2390: my %allroles=();
2391: my %thesepriv=();
2392: my $now=time;
2393: my $userroles="user.login.time=$now\n";
2394: my $thesestr;
2395:
2396: if ($rolesdump ne '') {
2397: foreach (split(/&/,$rolesdump)) {
2398: if ($_!~/^rolesdef\&/) {
2399: my ($area,$role)=split(/=/,$_);
2400: $area=~s/\_\w\w$//;
2401: my ($trole,$tend,$tstart)=split(/_/,$role);
2402: $userroles.='user.role.'.$trole.'.'.$area.'='.
2403: $tstart.'.'.$tend."\n";
2404: # log the associated role with the area
2405: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2406: if ($tend!=0) {
2407: if ($tend<$now) {
2408: $trole='';
2409: }
2410: }
2411: if ($tstart!=0) {
2412: if ($tstart>$now) {
2413: $trole='';
2414: }
2415: }
2416: if (($area ne '') && ($trole ne '')) {
2417: my $spec=$trole.'.'.$area;
2418: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2419: if ($trole =~ /^cr\//) {
2420: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2421: my $homsvr=homeserver($rauthor,$rdomain);
2422: if ($hostname{$homsvr} ne '') {
2423: my ($rdummy,$roledef)=
2424: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2425:
2426: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2427: my ($syspriv,$dompriv,$coursepriv)=
2428: split(/\_/,$roledef);
2429: if (defined($syspriv)) {
2430: $allroles{'cm./'}.=':'.$syspriv;
2431: $allroles{$spec.'./'}.=':'.$syspriv;
2432: }
2433: if ($tdomain ne '') {
2434: if (defined($dompriv)) {
2435: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2436: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2437: }
2438: if ($trest ne '') {
2439: if (defined($coursepriv)) {
2440: $allroles{'cm.'.$area}.=':'.$coursepriv;
2441: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
2442: }
2443: }
2444: }
2445: }
2446: }
2447: } else {
2448: if (defined($pr{$trole.':s'})) {
2449: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
2450: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2451: }
2452: if ($tdomain ne '') {
2453: if (defined($pr{$trole.':d'})) {
2454: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2455: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2456: }
2457: if ($trest ne '') {
2458: if (defined($pr{$trole.':c'})) {
2459: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2460: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2461: }
2462: }
2463: }
2464: }
2465: }
2466: }
2467: }
2468: my $adv=0;
2469: my $author=0;
2470: foreach (keys %allroles) {
2471: %thesepriv=();
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: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2484: }
2485: }
2486: $thesestr='';
2487: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2488: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
2489: }
2490: $userroles.='user.adv='.$adv."\n".
2491: 'user.author='.$author."\n";
2492: $ENV{'user.adv'}=$adv;
2493: }
2494: return $userroles;
2495: }
2496:
2497: # --------------------------------------------------------------- get interface
2498:
2499: sub get {
2500: my ($namespace,$storearr,$udomain,$uname)=@_;
2501: my $items='';
2502: foreach (@$storearr) {
2503: $items.=escape($_).'&';
2504: }
2505: $items=~s/\&$//;
2506: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2507: if (!$uname) { $uname=$ENV{'user.name'}; }
2508: my $uhome=&homeserver($uname,$udomain);
2509:
2510: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2511: my @pairs=split(/\&/,$rep);
2512: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2513: return @pairs;
2514: }
2515: my %returnhash=();
2516: my $i=0;
2517: foreach (@$storearr) {
2518: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2519: $i++;
2520: }
2521: return %returnhash;
2522: }
2523:
2524: # --------------------------------------------------------------- del interface
2525:
2526: sub del {
2527: my ($namespace,$storearr,$udomain,$uname)=@_;
2528: my $items='';
2529: foreach (@$storearr) {
2530: $items.=escape($_).'&';
2531: }
2532: $items=~s/\&$//;
2533: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2534: if (!$uname) { $uname=$ENV{'user.name'}; }
2535: my $uhome=&homeserver($uname,$udomain);
2536:
2537: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2538: }
2539:
2540: # -------------------------------------------------------------- dump interface
2541:
2542: sub dump {
2543: my ($namespace,$udomain,$uname,$regexp)=@_;
2544: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2545: if (!$uname) { $uname=$ENV{'user.name'}; }
2546: my $uhome=&homeserver($uname,$udomain);
2547: if ($regexp) {
2548: $regexp=&escape($regexp);
2549: } else {
2550: $regexp='.';
2551: }
2552: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2553: my @pairs=split(/\&/,$rep);
2554: my %returnhash=();
2555: foreach (@pairs) {
2556: my ($key,$value)=split(/=/,$_);
2557: $returnhash{unescape($key)}=&thaw_unescape($value);
2558: }
2559: return %returnhash;
2560: }
2561:
2562: # -------------------------------------------------------------- keys interface
2563:
2564: sub getkeys {
2565: my ($namespace,$udomain,$uname)=@_;
2566: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2567: if (!$uname) { $uname=$ENV{'user.name'}; }
2568: my $uhome=&homeserver($uname,$udomain);
2569: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2570: my @keyarray=();
2571: foreach (split(/\&/,$rep)) {
2572: push (@keyarray,&unescape($_));
2573: }
2574: return @keyarray;
2575: }
2576:
2577: # --------------------------------------------------------------- currentdump
2578: sub currentdump {
2579: my ($courseid,$sdom,$sname)=@_;
2580: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2581: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2582: $sname = $ENV{'user.name'} if (! defined($sname));
2583: my $uhome = &homeserver($sname,$sdom);
2584: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2585: return if ($rep =~ /^(error:|no_such_host)/);
2586: #
2587: my %returnhash=();
2588: #
2589: if ($rep eq "unknown_cmd") {
2590: # an old lond will not know currentdump
2591: # Do a dump and make it look like a currentdump
2592: my @tmp = &dump($courseid,$sdom,$sname,'.');
2593: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2594: my %hash = @tmp;
2595: @tmp=();
2596: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2597: } else {
2598: my @pairs=split(/\&/,$rep);
2599: foreach (@pairs) {
2600: my ($key,$value)=split(/=/,$_);
2601: my ($symb,$param) = split(/:/,$key);
2602: $returnhash{&unescape($symb)}->{&unescape($param)} =
2603: &thaw_unescape($value);
2604: }
2605: }
2606: return %returnhash;
2607: }
2608:
2609: sub convert_dump_to_currentdump{
2610: my %hash = %{shift()};
2611: my %returnhash;
2612: # Code ripped from lond, essentially. The only difference
2613: # here is the unescaping done by lonnet::dump(). Conceivably
2614: # we might run in to problems with parameter names =~ /^v\./
2615: while (my ($key,$value) = each(%hash)) {
2616: my ($v,$symb,$param) = split(/:/,$key);
2617: next if ($v eq 'version' || $symb eq 'keys');
2618: next if (exists($returnhash{$symb}) &&
2619: exists($returnhash{$symb}->{$param}) &&
2620: $returnhash{$symb}->{'v.'.$param} > $v);
2621: $returnhash{$symb}->{$param}=$value;
2622: $returnhash{$symb}->{'v.'.$param}=$v;
2623: }
2624: #
2625: # Remove all of the keys in the hashes which keep track of
2626: # the version of the parameter.
2627: while (my ($symb,$param_hash) = each(%returnhash)) {
2628: # use a foreach because we are going to delete from the hash.
2629: foreach my $key (keys(%$param_hash)) {
2630: delete($param_hash->{$key}) if ($key =~ /^v\./);
2631: }
2632: }
2633: return \%returnhash;
2634: }
2635:
2636: # --------------------------------------------------------------- inc interface
2637:
2638: sub inc {
2639: my ($namespace,$store,$udomain,$uname) = @_;
2640: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2641: if (!$uname) { $uname=$ENV{'user.name'}; }
2642: my $uhome=&homeserver($uname,$udomain);
2643: my $items='';
2644: if (! ref($store)) {
2645: # got a single value, so use that instead
2646: $items = &escape($store).'=&';
2647: } elsif (ref($store) eq 'SCALAR') {
2648: $items = &escape($$store).'=&';
2649: } elsif (ref($store) eq 'ARRAY') {
2650: $items = join('=&',map {&escape($_);} @{$store});
2651: } elsif (ref($store) eq 'HASH') {
2652: while (my($key,$value) = each(%{$store})) {
2653: $items.= &escape($key).'='.&escape($value).'&';
2654: }
2655: }
2656: $items=~s/\&$//;
2657: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2658: }
2659:
2660: # --------------------------------------------------------------- put interface
2661:
2662: sub put {
2663: my ($namespace,$storehash,$udomain,$uname)=@_;
2664: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2665: if (!$uname) { $uname=$ENV{'user.name'}; }
2666: my $uhome=&homeserver($uname,$udomain);
2667: my $items='';
2668: foreach (keys %$storehash) {
2669: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2670: }
2671: $items=~s/\&$//;
2672: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2673: }
2674:
2675: # ---------------------------------------------------------- putstore interface
2676:
2677: sub putstore {
2678: my ($namespace,$storehash,$udomain,$uname)=@_;
2679: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2680: if (!$uname) { $uname=$ENV{'user.name'}; }
2681: my $uhome=&homeserver($uname,$udomain);
2682: my $items='';
2683: my %allitems = ();
2684: foreach (keys %$storehash) {
2685: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
2686: my $key = $1.':keys:'.$2;
2687: $allitems{$key} .= $3.':';
2688: }
2689: $items.=$_.'='.&escape($$storehash{$_}).'&';
2690: }
2691: foreach (keys %allitems) {
2692: $allitems{$_} =~ s/\:$//;
2693: $items.= $_.'='.$allitems{$_}.'&';
2694: }
2695: $items=~s/\&$//;
2696: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2697: }
2698:
2699: # ------------------------------------------------------ critical put interface
2700:
2701: sub cput {
2702: my ($namespace,$storehash,$udomain,$uname)=@_;
2703: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2704: if (!$uname) { $uname=$ENV{'user.name'}; }
2705: my $uhome=&homeserver($uname,$udomain);
2706: my $items='';
2707: foreach (keys %$storehash) {
2708: $items.=escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2709: }
2710: $items=~s/\&$//;
2711: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2712: }
2713:
2714: # -------------------------------------------------------------- eget interface
2715:
2716: sub eget {
2717: my ($namespace,$storearr,$udomain,$uname)=@_;
2718: my $items='';
2719: foreach (@$storearr) {
2720: $items.=escape($_).'&';
2721: }
2722: $items=~s/\&$//;
2723: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2724: if (!$uname) { $uname=$ENV{'user.name'}; }
2725: my $uhome=&homeserver($uname,$udomain);
2726: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2727: my @pairs=split(/\&/,$rep);
2728: my %returnhash=();
2729: my $i=0;
2730: foreach (@$storearr) {
2731: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2732: $i++;
2733: }
2734: return %returnhash;
2735: }
2736:
2737: # ---------------------------------------------- Custom access rule evaluation
2738:
2739: sub customaccess {
2740: my ($priv,$uri)=@_;
2741: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2742: $urealm=~s/^\W//;
2743: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2744: my $access=0;
2745: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2746: my ($effect,$realm,$role)=split(/\:/,$_);
2747: if ($role) {
2748: if ($role ne $urole) { next; }
2749: }
2750: foreach (split(/\s*\,\s*/,$realm)) {
2751: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2752: if ($tdom) {
2753: if ($tdom ne $udom) { next; }
2754: }
2755: if ($tcrs) {
2756: if ($tcrs ne $ucrs) { next; }
2757: }
2758: if ($tsec) {
2759: if ($tsec ne $usec) { next; }
2760: }
2761: $access=($effect eq 'allow');
2762: last;
2763: }
2764: if ($realm eq '' && $role eq '') {
2765: $access=($effect eq 'allow');
2766: }
2767: }
2768: return $access;
2769: }
2770:
2771: # ------------------------------------------------- Check for a user privilege
2772:
2773: sub allowed {
2774: my ($priv,$uri)=@_;
2775: $uri=&deversion($uri);
2776: my $orguri=$uri;
2777: $uri=&declutter($uri);
2778:
2779:
2780:
2781: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
2782: # Free bre access to adm and meta resources
2783: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
2784: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2785: return 'F';
2786: }
2787:
2788: # Free bre access to user's own portfolio contents
2789: my ($space,$domain,$name,$dir)=split('/',$uri);
2790: if (('uploaded' eq $space) && ($ENV{'user.name'} eq $name) &&
2791: ($ENV{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
2792: return 'F';
2793: }
2794:
2795: # Free bre to public access
2796:
2797: if ($priv eq 'bre') {
2798: my $copyright=&metadata($uri,'copyright');
2799: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2800: return 'F';
2801: }
2802: if ($copyright eq 'priv') {
2803: $uri=~/([^\/]+)\/([^\/]+)\//;
2804: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2805: return '';
2806: }
2807: }
2808: if ($copyright eq 'domain') {
2809: $uri=~/([^\/]+)\/([^\/]+)\//;
2810: unless (($ENV{'user.domain'} eq $1) ||
2811: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2812: return '';
2813: }
2814: }
2815: if ($ENV{'request.role'}=~ /li\.\//) {
2816: # Library role, so allow browsing of resources in this domain.
2817: return 'F';
2818: }
2819: if ($copyright eq 'custom') {
2820: unless (&customaccess($priv,$uri)) { return ''; }
2821: }
2822: }
2823: # Domain coordinator is trying to create a course
2824: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2825: # uri is the requested domain in this case.
2826: # comparison to 'request.role.domain' shows if the user has selected
2827: # a role of dc for the domain in question.
2828: return 'F' if ($uri eq $ENV{'request.role.domain'});
2829: }
2830:
2831: my $thisallowed='';
2832: my $statecond=0;
2833: my $courseprivid='';
2834:
2835: # Course
2836:
2837: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
2838: $thisallowed.=$1;
2839: }
2840:
2841: # Domain
2842:
2843: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2844: =~/\Q$priv\E\&([^\:]*)/) {
2845: $thisallowed.=$1;
2846: }
2847:
2848: # Course: uri itself is a course
2849: my $courseuri=$uri;
2850: $courseuri=~s/\_(\d)/\/$1/;
2851: $courseuri=~s/^([^\/])/\/$1/;
2852:
2853: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2854: =~/\Q$priv\E\&([^\:]*)/) {
2855: $thisallowed.=$1;
2856: }
2857:
2858: # URI is an uploaded document for this course
2859:
2860: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
2861: my $refuri=$ENV{'httpref.'.$orguri};
2862: if ($refuri) {
2863: if ($refuri =~ m|^/adm/|) {
2864: $thisallowed='F';
2865: }
2866: }
2867: }
2868:
2869: # Full access at system, domain or course-wide level? Exit.
2870:
2871: if ($thisallowed=~/F/) {
2872: return 'F';
2873: }
2874:
2875: # If this is generating or modifying users, exit with special codes
2876:
2877: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:\Q$priv\E\:/) {
2878: return $thisallowed;
2879: }
2880: #
2881: # Gathered so far: system, domain and course wide privileges
2882: #
2883: # Course: See if uri or referer is an individual resource that is part of
2884: # the course
2885:
2886: if ($ENV{'request.course.id'}) {
2887:
2888: $courseprivid=$ENV{'request.course.id'};
2889: if ($ENV{'request.course.sec'}) {
2890: $courseprivid.='/'.$ENV{'request.course.sec'};
2891: }
2892: $courseprivid=~s/\_/\//;
2893: my $checkreferer=1;
2894: my ($match,$cond)=&is_on_map($uri);
2895: if ($match) {
2896: $statecond=$cond;
2897: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2898: =~/\Q$priv\E\&([^\:]*)/) {
2899: $thisallowed.=$1;
2900: $checkreferer=0;
2901: }
2902: }
2903:
2904: if ($checkreferer) {
2905: my $refuri=$ENV{'httpref.'.$orguri};
2906: unless ($refuri) {
2907: foreach (keys %ENV) {
2908: if ($_=~/^httpref\..*\*/) {
2909: my $pattern=$_;
2910: $pattern=~s/^httpref\.\/res\///;
2911: $pattern=~s/\*/\[\^\/\]\+/g;
2912: $pattern=~s/\//\\\//g;
2913: if ($orguri=~/$pattern/) {
2914: $refuri=$ENV{$_};
2915: }
2916: }
2917: }
2918: }
2919:
2920: if ($refuri) {
2921: $refuri=&declutter($refuri);
2922: my ($match,$cond)=&is_on_map($refuri);
2923: if ($match) {
2924: my $refstatecond=$cond;
2925: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2926: =~/\Q$priv\E\&([^\:]*)/) {
2927: $thisallowed.=$1;
2928: $uri=$refuri;
2929: $statecond=$refstatecond;
2930: }
2931: }
2932: }
2933: }
2934: }
2935:
2936: #
2937: # Gathered now: all privileges that could apply, and condition number
2938: #
2939: #
2940: # Full or no access?
2941: #
2942:
2943: if ($thisallowed=~/F/) {
2944: return 'F';
2945: }
2946:
2947: unless ($thisallowed) {
2948: return '';
2949: }
2950:
2951: # Restrictions exist, deal with them
2952: #
2953: # C:according to course preferences
2954: # R:according to resource settings
2955: # L:unless locked
2956: # X:according to user session state
2957: #
2958:
2959: # Possibly locked functionality, check all courses
2960: # Locks might take effect only after 10 minutes cache expiration for other
2961: # courses, and 2 minutes for current course
2962:
2963: my $envkey;
2964: if ($thisallowed=~/L/) {
2965: foreach $envkey (keys %ENV) {
2966: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2967: my $courseid=$2;
2968: my $roleid=$1.'.'.$2;
2969: $courseid=~s/^\///;
2970: my $expiretime=600;
2971: if ($ENV{'request.role'} eq $roleid) {
2972: $expiretime=120;
2973: }
2974: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2975: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2976: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2977: &coursedescription($courseid);
2978: }
2979: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
2980: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2981: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2982: &log($ENV{'user.domain'},$ENV{'user.name'},
2983: $ENV{'user.home'},
2984: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2985: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2986: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2987: return '';
2988: }
2989: }
2990: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
2991: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2992: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2993: &log($ENV{'user.domain'},$ENV{'user.name'},
2994: $ENV{'user.home'},
2995: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2996: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2997: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2998: return '';
2999: }
3000: }
3001: }
3002: }
3003: }
3004:
3005: #
3006: # Rest of the restrictions depend on selected course
3007: #
3008:
3009: unless ($ENV{'request.course.id'}) {
3010: return '1';
3011: }
3012:
3013: #
3014: # Now user is definitely in a course
3015: #
3016:
3017:
3018: # Course preferences
3019:
3020: if ($thisallowed=~/C/) {
3021: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
3022: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
3023: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
3024: =~/\Q$rolecode\E/) {
3025: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
3026: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3027: $ENV{'request.course.id'});
3028: return '';
3029: }
3030:
3031: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
3032: =~/\Q$unamedom\E/) {
3033: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
3034: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3035: $ENV{'request.course.id'});
3036: return '';
3037: }
3038: }
3039:
3040: # Resource preferences
3041:
3042: if ($thisallowed=~/R/) {
3043: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
3044: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3045: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
3046: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3047: return '';
3048: }
3049: }
3050:
3051: # Restricted by state or randomout?
3052:
3053: if ($thisallowed=~/X/) {
3054: if ($ENV{'acc.randomout'}) {
3055: my $symb=&symbread($uri,1);
3056: if (($symb) && ($ENV{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3057: return '';
3058: }
3059: }
3060: if (&condval($statecond)) {
3061: return '2';
3062: } else {
3063: return '';
3064: }
3065: }
3066:
3067: return 'F';
3068: }
3069:
3070: # --------------------------------------------------- Is a resource on the map?
3071:
3072: sub is_on_map {
3073: my $uri=&declutter(shift);
3074: $uri=~s/\.\d+\.(\w+)$/\.$1/;
3075: my @uriparts=split(/\//,$uri);
3076: my $filename=$uriparts[$#uriparts];
3077: my $pathname=$uri;
3078: $pathname=~s|/\Q$filename\E$||;
3079: $pathname=~s/^adm\/wrapper\///;
3080: #Trying to find the conditional for the file
3081: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
3082: /\&\Q$filename\E\:([\d\|]+)\&/);
3083: if ($match) {
3084: return (1,$1);
3085: } else {
3086: return (0,0);
3087: }
3088: }
3089:
3090: # --------------------------------------------------------- Get symb from alias
3091:
3092: sub get_symb_from_alias {
3093: my $symb=shift;
3094: my ($map,$resid,$url)=&decode_symb($symb);
3095: # Already is a symb
3096: if ($url) { return $symb; }
3097: # Must be an alias
3098: my $aliassymb='';
3099: my %bighash;
3100: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3101: &GDBM_READER(),0640)) {
3102: my $rid=$bighash{'mapalias_'.$symb};
3103: if ($rid) {
3104: my ($mapid,$resid)=split(/\./,$rid);
3105: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3106: $resid,$bighash{'src_'.$rid});
3107: }
3108: untie %bighash;
3109: }
3110: return $aliassymb;
3111: }
3112:
3113: # ----------------------------------------------------------------- Define Role
3114:
3115: sub definerole {
3116: if (allowed('mcr','/')) {
3117: my ($rolename,$sysrole,$domrole,$courole)=@_;
3118: foreach (split(':',$sysrole)) {
3119: my ($crole,$cqual)=split(/\&/,$_);
3120: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3121: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3122: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3123: return "refused:s:$crole&$cqual";
3124: }
3125: }
3126: }
3127: foreach (split(':',$domrole)) {
3128: my ($crole,$cqual)=split(/\&/,$_);
3129: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3130: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3131: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3132: return "refused:d:$crole&$cqual";
3133: }
3134: }
3135: }
3136: foreach (split(':',$courole)) {
3137: my ($crole,$cqual)=split(/\&/,$_);
3138: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3139: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3140: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3141: return "refused:c:$crole&$cqual";
3142: }
3143: }
3144: }
3145: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3146: "$ENV{'user.domain'}:$ENV{'user.name'}:".
3147: "rolesdef_$rolename=".
3148: escape($sysrole.'_'.$domrole.'_'.$courole);
3149: return reply($command,$ENV{'user.home'});
3150: } else {
3151: return 'refused';
3152: }
3153: }
3154:
3155: # ---------------- Make a metadata query against the network of library servers
3156:
3157: sub metadata_query {
3158: my ($query,$custom,$customshow,$server_array)=@_;
3159: my %rhash;
3160: my @server_list = (defined($server_array) ? @$server_array
3161: : keys(%libserv) );
3162: for my $server (@server_list) {
3163: unless ($custom or $customshow) {
3164: my $reply=&reply("querysend:".&escape($query),$server);
3165: $rhash{$server}=$reply;
3166: }
3167: else {
3168: my $reply=&reply("querysend:".&escape($query).':'.
3169: &escape($custom).':'.&escape($customshow),
3170: $server);
3171: $rhash{$server}=$reply;
3172: }
3173: }
3174: return \%rhash;
3175: }
3176:
3177: # ----------------------------------------- Send log queries and wait for reply
3178:
3179: sub log_query {
3180: my ($uname,$udom,$query,%filters)=@_;
3181: my $uhome=&homeserver($uname,$udom);
3182: if ($uhome eq 'no_host') { return 'error: no_host'; }
3183: my $uhost=$hostname{$uhome};
3184: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3185: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3186: $uhome);
3187: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3188: return get_query_reply($queryid);
3189: }
3190:
3191: # ------- Request retrieval of institutional classlists for course(s)
3192:
3193: sub fetch_enrollment_query {
3194: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3195: my $homeserver;
3196: my $maxtries = 1;
3197: if ($context eq 'automated') {
3198: $homeserver = $perlvar{'lonHostID'};
3199: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3200: } else {
3201: $homeserver = &homeserver($cnum,$dom);
3202: }
3203: my $host=$hostname{$homeserver};
3204: my $cmd = '';
3205: foreach (keys %{$affiliatesref}) {
3206: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3207: }
3208: $cmd =~ s/%%$//;
3209: $cmd = &escape($cmd);
3210: my $query = 'fetchenrollment';
3211: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$ENV{'user.name'}.':'.$cmd,$homeserver);
3212: unless ($queryid=~/^\Q$host\E\_/) {
3213: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3214: return 'error: '.$queryid;
3215: }
3216: my $reply = &get_query_reply($queryid);
3217: my $tries = 1;
3218: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3219: $reply = &get_query_reply($queryid);
3220: $tries ++;
3221: }
3222: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3223: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$ENV{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3224: } else {
3225: my @responses = split/:/,$reply;
3226: if ($homeserver eq $perlvar{'lonHostID'}) {
3227: foreach (@responses) {
3228: my ($key,$value) = split/=/,$_;
3229: $$replyref{$key} = $value;
3230: }
3231: } else {
3232: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3233: foreach (@responses) {
3234: my ($key,$value) = split/=/,$_;
3235: $$replyref{$key} = $value;
3236: if ($value > 0) {
3237: foreach (@{$$affiliatesref{$key}}) {
3238: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3239: my $destname = $pathname.'/'.$filename;
3240: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3241: if ($xml_classlist =~ /^error/) {
3242: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3243: } else {
3244: if ( open(FILE,">$destname") ) {
3245: print FILE &unescape($xml_classlist);
3246: close(FILE);
3247: } else {
3248: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3249: }
3250: }
3251: }
3252: }
3253: }
3254: }
3255: return 'ok';
3256: }
3257: return 'error';
3258: }
3259:
3260: sub get_query_reply {
3261: my $queryid=shift;
3262: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3263: my $reply='';
3264: for (1..100) {
3265: sleep 2;
3266: if (-e $replyfile.'.end') {
3267: if (open(my $fh,$replyfile)) {
3268: $reply.=<$fh>;
3269: close($fh);
3270: } else { return 'error: reply_file_error'; }
3271: return &unescape($reply);
3272: }
3273: }
3274: return 'timeout:'.$queryid;
3275: }
3276:
3277: sub courselog_query {
3278: #
3279: # possible filters:
3280: # url: url or symb
3281: # username
3282: # domain
3283: # action: view, submit, grade
3284: # start: timestamp
3285: # end: timestamp
3286: #
3287: my (%filters)=@_;
3288: unless ($ENV{'request.course.id'}) { return 'no_course'; }
3289: if ($filters{'url'}) {
3290: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3291: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3292: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3293: }
3294: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
3295: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
3296: return &log_query($cname,$cdom,'courselog',%filters);
3297: }
3298:
3299: sub userlog_query {
3300: my ($uname,$udom,%filters)=@_;
3301: return &log_query($uname,$udom,'userlog',%filters);
3302: }
3303:
3304: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3305:
3306: sub auto_run {
3307: my ($cnum,$cdom) = @_;
3308: my $homeserver = &homeserver($cnum,$cdom);
3309: my $response = &reply('autorun:'.$cdom,$homeserver);
3310: return $response;
3311: }
3312:
3313: sub auto_get_sections {
3314: my ($cnum,$cdom,$inst_coursecode) = @_;
3315: my $homeserver = &homeserver($cnum,$cdom);
3316: my @secs = ();
3317: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3318: unless ($response eq 'refused') {
3319: @secs = split/:/,$response;
3320: }
3321: return @secs;
3322: }
3323:
3324: sub auto_new_course {
3325: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3326: my $homeserver = &homeserver($cnum,$cdom);
3327: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3328: return $response;
3329: }
3330:
3331: sub auto_validate_courseID {
3332: my ($cnum,$cdom,$inst_course_id) = @_;
3333: my $homeserver = &homeserver($cnum,$cdom);
3334: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3335: return $response;
3336: }
3337:
3338: sub auto_create_password {
3339: my ($cnum,$cdom,$authparam) = @_;
3340: my $homeserver = &homeserver($cnum,$cdom);
3341: my $create_passwd = 0;
3342: my $authchk = '';
3343: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3344: if ($response eq 'refused') {
3345: $authchk = 'refused';
3346: } else {
3347: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3348: }
3349: return ($authparam,$create_passwd,$authchk);
3350: }
3351:
3352: sub auto_instcode_format {
3353: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3354: my $courses = '';
3355: my $homeserver;
3356: if ($caller eq 'global') {
3357: $homeserver = $perlvar{'lonHostID'};
3358: } else {
3359: $homeserver = &homeserver($caller,$codedom);
3360: }
3361: my $host=$hostname{$homeserver};
3362: foreach (keys %{$instcodes}) {
3363: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3364: }
3365: chop($courses);
3366: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3367: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3368: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3369: %{$codes} = &str2hash($codes_str);
3370: @{$codetitles} = &str2array($codetitles_str);
3371: %{$cat_titles} = &str2hash($cat_titles_str);
3372: %{$cat_order} = &str2hash($cat_order_str);
3373: return 'ok';
3374: }
3375: return $response;
3376: }
3377:
3378: # ------------------------------------------------------------------ Plain Text
3379:
3380: sub plaintext {
3381: my $short=shift;
3382: return &mt($prp{$short});
3383: }
3384:
3385: # ----------------------------------------------------------------- Assign Role
3386:
3387: sub assignrole {
3388: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3389: my $mrole;
3390: if ($role =~ /^cr\//) {
3391: my $cwosec=$url;
3392: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3393: unless (&allowed('ccr',$cwosec)) {
3394: &logthis('Refused custom assignrole: '.
3395: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3396: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3397: return 'refused';
3398: }
3399: $mrole='cr';
3400: } else {
3401: my $cwosec=$url;
3402: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3403: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3404: &logthis('Refused assignrole: '.
3405: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3406: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3407: return 'refused';
3408: }
3409: $mrole=$role;
3410: }
3411: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3412: "$udom:$uname:$url".'_'."$mrole=$role";
3413: if ($end) { $command.='_'.$end; }
3414: if ($start) {
3415: if ($end) {
3416: $command.='_'.$start;
3417: } else {
3418: $command.='_0_'.$start;
3419: }
3420: }
3421: # actually delete
3422: if ($deleteflag) {
3423: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3424: # modify command to delete the role
3425: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
3426: "$udom:$uname:$url".'_'."$mrole";
3427: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
3428: # set start and finish to negative values for userrolelog
3429: $start=-1;
3430: $end=-1;
3431: }
3432: }
3433: # send command
3434: my $answer=&reply($command,&homeserver($uname,$udom));
3435: # log new user role if status is ok
3436: if ($answer eq 'ok') {
3437: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
3438: }
3439: return $answer;
3440: }
3441:
3442: # -------------------------------------------------- Modify user authentication
3443: # Overrides without validation
3444:
3445: sub modifyuserauth {
3446: my ($udom,$uname,$umode,$upass)=@_;
3447: my $uhome=&homeserver($uname,$udom);
3448: unless (&allowed('mau',$udom)) { return 'refused'; }
3449: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3450: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3451: ' in domain '.$ENV{'request.role.domain'});
3452: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3453: &escape($upass),$uhome);
3454: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
3455: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3456: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3457: &log($udom,,$uname,$uhome,
3458: 'Authentication changed by '.$ENV{'user.domain'}.', '.
3459: $ENV{'user.name'}.', '.$umode.
3460: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3461: unless ($reply eq 'ok') {
3462: &logthis('Authentication mode error: '.$reply);
3463: return 'error: '.$reply;
3464: }
3465: return 'ok';
3466: }
3467:
3468: # --------------------------------------------------------------- Modify a user
3469:
3470: sub modifyuser {
3471: my ($udom, $uname, $uid,
3472: $umode, $upass, $first,
3473: $middle, $last, $gene,
3474: $forceid, $desiredhome, $email)=@_;
3475: $udom=~s/\W//g;
3476: $uname=~s/\W//g;
3477: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3478: $umode.', '.$first.', '.$middle.', '.
3479: $last.', '.$gene.'(forceid: '.$forceid.')'.
3480: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3481: ' desiredhome not specified').
3482: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3483: ' in domain '.$ENV{'request.role.domain'});
3484: my $uhome=&homeserver($uname,$udom,'true');
3485: # ----------------------------------------------------------------- Create User
3486: if (($uhome eq 'no_host') &&
3487: (($umode && $upass) || ($umode eq 'localauth'))) {
3488: my $unhome='';
3489: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3490: $unhome = $desiredhome;
3491: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
3492: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
3493: } else { # load balancing routine for determining $unhome
3494: my $tryserver;
3495: my $loadm=10000000;
3496: foreach $tryserver (keys %libserv) {
3497: if ($hostdom{$tryserver} eq $udom) {
3498: my $answer=reply('load',$tryserver);
3499: if (($answer=~/\d+/) && ($answer<$loadm)) {
3500: $loadm=$answer;
3501: $unhome=$tryserver;
3502: }
3503: }
3504: }
3505: }
3506: if (($unhome eq '') || ($unhome eq 'no_host')) {
3507: return 'error: unable to find a home server for '.$uname.
3508: ' in domain '.$udom;
3509: }
3510: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3511: &escape($upass),$unhome);
3512: unless ($reply eq 'ok') {
3513: return 'error: '.$reply;
3514: }
3515: $uhome=&homeserver($uname,$udom,'true');
3516: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3517: return 'error: unable verify users home machine.';
3518: }
3519: } # End of creation of new user
3520: # ---------------------------------------------------------------------- Add ID
3521: if ($uid) {
3522: $uid=~tr/A-Z/a-z/;
3523: my %uidhash=&idrget($udom,$uname);
3524: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3525: && (!$forceid)) {
3526: unless ($uid eq $uidhash{$uname}) {
3527: return 'error: user id "'.$uid.'" does not match '.
3528: 'current user id "'.$uidhash{$uname}.'".';
3529: }
3530: } else {
3531: &idput($udom,($uname => $uid));
3532: }
3533: }
3534: # -------------------------------------------------------------- Add names, etc
3535: my @tmp=&get('environment',
3536: ['firstname','middlename','lastname','generation'],
3537: $udom,$uname);
3538: my %names;
3539: if ($tmp[0] =~ m/^error:.*/) {
3540: %names=();
3541: } else {
3542: %names = @tmp;
3543: }
3544: #
3545: # Make sure to not trash student environment if instructor does not bother
3546: # to supply name and email information
3547: #
3548: if ($first) { $names{'firstname'} = $first; }
3549: if (defined($middle)) { $names{'middlename'} = $middle; }
3550: if ($last) { $names{'lastname'} = $last; }
3551: if (defined($gene)) { $names{'generation'} = $gene; }
3552: if ($email) { $names{'notification'} = $email;
3553: $names{'critnotification'} = $email; }
3554:
3555: my $reply = &put('environment', \%names, $udom,$uname);
3556: if ($reply ne 'ok') { return 'error: '.$reply; }
3557: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
3558: $umode.', '.$first.', '.$middle.', '.
3559: $last.', '.$gene.' by '.
3560: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3561: return 'ok';
3562: }
3563:
3564: # -------------------------------------------------------------- Modify student
3565:
3566: sub modifystudent {
3567: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3568: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
3569: if (!$cid) {
3570: unless ($cid=$ENV{'request.course.id'}) {
3571: return 'not_in_class';
3572: }
3573: }
3574: # --------------------------------------------------------------- Make the user
3575: my $reply=&modifyuser
3576: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
3577: $desiredhome,$email);
3578: unless ($reply eq 'ok') { return $reply; }
3579: # This will cause &modify_student_enrollment to get the uid from the
3580: # students environment
3581: $uid = undef if (!$forceid);
3582: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
3583: $gene,$usec,$end,$start,$type,$locktype,$cid);
3584: return $reply;
3585: }
3586:
3587: sub modify_student_enrollment {
3588: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
3589: my ($cdom,$cnum,$chome);
3590: if (!$cid) {
3591: unless ($cid=$ENV{'request.course.id'}) {
3592: return 'not_in_class';
3593: }
3594: $cdom=$ENV{'course.'.$cid.'.domain'};
3595: $cnum=$ENV{'course.'.$cid.'.num'};
3596: } else {
3597: ($cdom,$cnum)=split(/_/,$cid);
3598: }
3599: $chome=$ENV{'course.'.$cid.'.home'};
3600: if (!$chome) {
3601: $chome=&homeserver($cnum,$cdom);
3602: }
3603: if (!$chome) { return 'unknown_course'; }
3604: # Make sure the user exists
3605: my $uhome=&homeserver($uname,$udom);
3606: if (($uhome eq '') || ($uhome eq 'no_host')) {
3607: return 'error: no such user';
3608: }
3609: # Get student data if we were not given enough information
3610: if (!defined($first) || $first eq '' ||
3611: !defined($last) || $last eq '' ||
3612: !defined($uid) || $uid eq '' ||
3613: !defined($middle) || $middle eq '' ||
3614: !defined($gene) || $gene eq '') {
3615: # They did not supply us with enough data to enroll the student, so
3616: # we need to pick up more information.
3617: my %tmp = &get('environment',
3618: ['firstname','middlename','lastname', 'generation','id']
3619: ,$udom,$uname);
3620:
3621: #foreach (keys(%tmp)) {
3622: # &logthis("key $_ = ".$tmp{$_});
3623: #}
3624: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3625: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3626: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3627: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3628: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3629: }
3630: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
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: sub format_name {
3648: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
3649: my $name;
3650: if ($first ne 'lastname') {
3651: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
3652: } else {
3653: if ($lastname=~/\S/) {
3654: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
3655: $name=~s/\s+,/,/;
3656: } else {
3657: $name.= $firstname.' '.$middlename.' '.$generation;
3658: }
3659: }
3660: $name=~s/^\s+//;
3661: $name=~s/\s+$//;
3662: $name=~s/\s+/ /g;
3663: return $name;
3664: }
3665:
3666: # ------------------------------------------------- Write to course preferences
3667:
3668: sub writecoursepref {
3669: my ($courseid,%prefs)=@_;
3670: $courseid=~s/^\///;
3671: $courseid=~s/\_/\//g;
3672: my ($cdomain,$cnum)=split(/\//,$courseid);
3673: my $chome=homeserver($cnum,$cdomain);
3674: if (($chome eq '') || ($chome eq 'no_host')) {
3675: return 'error: no such course';
3676: }
3677: my $cstring='';
3678: foreach (keys %prefs) {
3679: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3680: }
3681: $cstring=~s/\&$//;
3682: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3683: }
3684:
3685: # ---------------------------------------------------------- Make/modify course
3686:
3687: sub createcourse {
3688: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code)=@_;
3689: $url=&declutter($url);
3690: my $cid='';
3691: unless (&allowed('ccc',$udom)) {
3692: return 'refused';
3693: }
3694: # ------------------------------------------------------------------- Create ID
3695: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3696: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3697: # ----------------------------------------------- Make sure that does not exist
3698: my $uhome=&homeserver($uname,$udom,'true');
3699: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3700: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3701: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3702: $uhome=&homeserver($uname,$udom,'true');
3703: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3704: return 'error: unable to generate unique course-ID';
3705: }
3706: }
3707: # ------------------------------------------------ Check supplied server name
3708: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3709: if (! exists($libserv{$course_server})) {
3710: return 'error:bad server name '.$course_server;
3711: }
3712: # ------------------------------------------------------------- Make the course
3713: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3714: $course_server);
3715: unless ($reply eq 'ok') { return 'error: '.$reply; }
3716: $uhome=&homeserver($uname,$udom,'true');
3717: if (($uhome eq '') || ($uhome eq 'no_host')) {
3718: return 'error: no such course';
3719: }
3720: # ----------------------------------------------------------------- Course made
3721: # log existence
3722: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
3723: '='.&escape($inst_code),$uhome);
3724: &flushcourselogs();
3725: # set toplevel url
3726: my $topurl=$url;
3727: unless ($nonstandard) {
3728: # ------------------------------------------ For standard courses, make top url
3729: my $mapurl=&clutter($url);
3730: if ($mapurl eq '/res/') { $mapurl=''; }
3731: $ENV{'form.initmap'}=(<<ENDINITMAP);
3732: <map>
3733: <resource id="1" type="start"></resource>
3734: <resource id="2" src="$mapurl"></resource>
3735: <resource id="3" type="finish"></resource>
3736: <link index="1" from="1" to="2"></link>
3737: <link index="2" from="2" to="3"></link>
3738: </map>
3739: ENDINITMAP
3740: $topurl=&declutter(
3741: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3742: );
3743: }
3744: # ----------------------------------------------------------- Write preferences
3745: &writecoursepref($udom.'_'.$uname,
3746: ('description' => $description,
3747: 'url' => $topurl));
3748: return '/'.$udom.'/'.$uname;
3749: }
3750:
3751: # ---------------------------------------------------------- Assign Custom Role
3752:
3753: sub assigncustomrole {
3754: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3755: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3756: $end,$start,$deleteflag);
3757: }
3758:
3759: # ----------------------------------------------------------------- Revoke Role
3760:
3761: sub revokerole {
3762: my ($udom,$uname,$url,$role,$deleteflag)=@_;
3763: my $now=time;
3764: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
3765: }
3766:
3767: # ---------------------------------------------------------- Revoke Custom Role
3768:
3769: sub revokecustomrole {
3770: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
3771: my $now=time;
3772: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3773: $deleteflag);
3774: }
3775:
3776: # ------------------------------------------------------------ Disk usage
3777: sub diskusage {
3778: my ($udom,$uname,$directoryRoot)=@_;
3779: $directoryRoot =~ s/\/$//;
3780: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
3781: return $listing;
3782: }
3783:
3784: # ------------------------------------------------------------- Mark as Read Only
3785:
3786: sub mark_as_readonly {
3787: my ($domain,$user,$files,$what) = @_;
3788: my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
3789: foreach my $file (@{$files}) {
3790: push (@{$current_permissions{$file}},$what);
3791: }
3792: &Apache::lonnet::put('file_permissions',\%current_permissions,$domain,$user);
3793: return;
3794: }
3795:
3796: # ------------------------------------------------------------ Unmark as Read Only
3797:
3798: sub unmark_as_readonly {
3799: my ($domain,$user,$file,$what) = @_;
3800: my $current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
3801:
3802: &Apache::lonnet::put('file_permissions',$current_permissions,$domain,$user);
3803: return;
3804: }
3805:
3806: # ------------------------------------------------------------ Directory lister
3807:
3808: sub dirlist {
3809: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3810:
3811: $uri=~s/^\///;
3812: $uri=~s/\/$//;
3813: my ($udom, $uname);
3814: (undef,$udom,$uname)=split(/\//,$uri);
3815: if(defined($userdomain)) {
3816: $udom = $userdomain;
3817: }
3818: if(defined($username)) {
3819: $uname = $username;
3820: }
3821:
3822: my $dirRoot = $perlvar{'lonDocRoot'};
3823: if(defined($alternateDirectoryRoot)) {
3824: $dirRoot = $alternateDirectoryRoot;
3825: $dirRoot =~ s/\/$//;
3826: }
3827:
3828: if($udom) {
3829: if($uname) {
3830: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
3831: homeserver($uname,$udom));
3832: return split(/:/,$listing);
3833: } elsif(!defined($alternateDirectoryRoot)) {
3834: my $tryserver;
3835: my %allusers=();
3836: foreach $tryserver (keys %libserv) {
3837: if($hostdom{$tryserver} eq $udom) {
3838: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3839: $udom, $tryserver);
3840: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
3841: && ($listing ne 'con_lost')) {
3842: foreach (split(/:/,$listing)) {
3843: my ($entry,@stat)=split(/&/,$_);
3844: $allusers{$entry}=1;
3845: }
3846: }
3847: }
3848: }
3849: my $alluserstr='';
3850: foreach (sort keys %allusers) {
3851: $alluserstr.=$_.'&user:';
3852: }
3853: $alluserstr=~s/:$//;
3854: return split(/:/,$alluserstr);
3855: } else {
3856: my @emptyResults = ();
3857: push(@emptyResults, 'missing user name');
3858: return split(':',@emptyResults);
3859: }
3860: } elsif(!defined($alternateDirectoryRoot)) {
3861: my $tryserver;
3862: my %alldom=();
3863: foreach $tryserver (keys %libserv) {
3864: $alldom{$hostdom{$tryserver}}=1;
3865: }
3866: my $alldomstr='';
3867: foreach (sort keys %alldom) {
3868: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
3869: }
3870: $alldomstr=~s/:$//;
3871: return split(/:/,$alldomstr);
3872: } else {
3873: my @emptyResults = ();
3874: push(@emptyResults, 'missing domain');
3875: return split(':',@emptyResults);
3876: }
3877: }
3878:
3879: # --------------------------------------------- GetFileTimestamp
3880: # This function utilizes dirlist and returns the date stamp for
3881: # when it was last modified. It will also return an error of -1
3882: # if an error occurs
3883:
3884: ##
3885: ## FIXME: This subroutine assumes its caller knows something about the
3886: ## directory structure of the home server for the student ($root).
3887: ## Not a good assumption to make. Since this is for looking up files
3888: ## in user directories, the full path should be constructed by lond, not
3889: ## whatever machine we request data from.
3890: ##
3891: sub GetFileTimestamp {
3892: my ($studentDomain,$studentName,$filename,$root)=@_;
3893: $studentDomain=~s/\W//g;
3894: $studentName=~s/\W//g;
3895: my $subdir=$studentName.'__';
3896: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3897: my $proname="$studentDomain/$subdir/$studentName";
3898: $proname .= '/'.$filename;
3899: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
3900: $studentName, $root);
3901: my @stats = split('&', $fileStat);
3902: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
3903: # @stats contains first the filename, then the stat output
3904: return $stats[10]; # so this is 10 instead of 9.
3905: } else {
3906: return -1;
3907: }
3908: }
3909:
3910: # -------------------------------------------------------- Value of a Condition
3911:
3912: sub directcondval {
3913: my $number=shift;
3914: if (!defined($ENV{'user.state.'.$ENV{'request.course.id'}})) {
3915: &Apache::lonuserstate::evalstate();
3916: }
3917: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
3918: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
3919: } else {
3920: return 2;
3921: }
3922: }
3923:
3924: sub condval {
3925: my $condidx=shift;
3926: my $result=0;
3927: my $allpathcond='';
3928: foreach (split(/\|/,$condidx)) {
3929: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
3930: $allpathcond.=
3931: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
3932: }
3933: }
3934: $allpathcond=~s/\|$//;
3935: if ($ENV{'request.course.id'}) {
3936: if ($allpathcond) {
3937: my $operand='|';
3938: my @stack;
3939: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
3940: if ($_ eq '(') {
3941: push @stack,($operand,$result)
3942: } elsif ($_ eq ')') {
3943: my $before=pop @stack;
3944: if (pop @stack eq '&') {
3945: $result=$result>$before?$before:$result;
3946: } else {
3947: $result=$result>$before?$result:$before;
3948: }
3949: } elsif (($_ eq '&') || ($_ eq '|')) {
3950: $operand=$_;
3951: } else {
3952: my $new=directcondval($_);
3953: if ($operand eq '&') {
3954: $result=$result>$new?$new:$result;
3955: } else {
3956: $result=$result>$new?$result:$new;
3957: }
3958: }
3959: }
3960: }
3961: }
3962: return $result;
3963: }
3964:
3965: # ---------------------------------------------------- Devalidate courseresdata
3966:
3967: sub devalidatecourseresdata {
3968: my ($coursenum,$coursedomain)=@_;
3969: my $hashid=$coursenum.':'.$coursedomain;
3970: &devalidate_cache(\%courseresdatacache,$hashid,'courseres');
3971: }
3972:
3973: # --------------------------------------------------- Course Resourcedata Query
3974:
3975: sub courseresdata {
3976: my ($coursenum,$coursedomain,@which)=@_;
3977: my $coursehom=&homeserver($coursenum,$coursedomain);
3978: my $hashid=$coursenum.':'.$coursedomain;
3979: my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid,'courseres');
3980: unless (defined($cached)) {
3981: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
3982: $result=\%dumpreply;
3983: my ($tmp) = keys(%dumpreply);
3984: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
3985: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
3986: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3987: return $tmp;
3988: } elsif ($tmp =~ /^(error)/) {
3989: $result=undef;
3990: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
3991: }
3992: }
3993: foreach my $item (@which) {
3994: if (defined($result->{$item})) {
3995: return $result->{$item};
3996: }
3997: }
3998: return undef;
3999: }
4000:
4001: #
4002: # EXT resource caching routines
4003: #
4004:
4005: sub clear_EXT_cache_status {
4006: &delenv('cache.EXT.');
4007: }
4008:
4009: sub EXT_cache_status {
4010: my ($target_domain,$target_user) = @_;
4011: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4012: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
4013: # We know already the user has no data
4014: return 1;
4015: } else {
4016: return 0;
4017: }
4018: }
4019:
4020: sub EXT_cache_set {
4021: my ($target_domain,$target_user) = @_;
4022: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4023: &appenv($cachename => time);
4024: }
4025:
4026: # --------------------------------------------------------- Value of a Variable
4027: sub EXT {
4028: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
4029:
4030: unless ($varname) { return ''; }
4031: #get real user name/domain, courseid and symb
4032: my $courseid;
4033: my $publicuser;
4034: if ($symbparm) {
4035: $symbparm=&get_symb_from_alias($symbparm);
4036: }
4037: if (!($uname && $udom)) {
4038: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
4039: &Apache::lonxml::whichuser($symbparm);
4040: if (!$symbparm) { $symbparm=$cursymb; }
4041: } else {
4042: $courseid=$ENV{'request.course.id'};
4043: }
4044: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
4045: my $rest;
4046: if (defined($therest[0])) {
4047: $rest=join('.',@therest);
4048: } else {
4049: $rest='';
4050: }
4051:
4052: my $qualifierrest=$qualifier;
4053: if ($rest) { $qualifierrest.='.'.$rest; }
4054: my $spacequalifierrest=$space;
4055: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
4056: if ($realm eq 'user') {
4057: # --------------------------------------------------------------- user.resource
4058: if ($space eq 'resource') {
4059: if (defined($Apache::lonhomework::parsing_a_problem)) {
4060: return $Apache::lonhomework::history{$qualifierrest};
4061: } else {
4062: my %restored;
4063: if ($publicuser || $ENV{'request.state'} eq 'construct') {
4064: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
4065: } else {
4066: %restored=&restore($symbparm,$courseid,$udom,$uname);
4067: }
4068: return $restored{$qualifierrest};
4069: }
4070: # ----------------------------------------------------------------- user.access
4071: } elsif ($space eq 'access') {
4072: # FIXME - not supporting calls for a specific user
4073: return &allowed($qualifier,$rest);
4074: # ------------------------------------------ user.preferences, user.environment
4075: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
4076: if (($uname eq $ENV{'user.name'}) &&
4077: ($udom eq $ENV{'user.domain'})) {
4078: return $ENV{join('.',('environment',$qualifierrest))};
4079: } else {
4080: my %returnhash;
4081: if (!$publicuser) {
4082: %returnhash=&userenvironment($udom,$uname,
4083: $qualifierrest);
4084: }
4085: return $returnhash{$qualifierrest};
4086: }
4087: # ----------------------------------------------------------------- user.course
4088: } elsif ($space eq 'course') {
4089: # FIXME - not supporting calls for a specific user
4090: return $ENV{join('.',('request.course',$qualifier))};
4091: # ------------------------------------------------------------------- user.role
4092: } elsif ($space eq 'role') {
4093: # FIXME - not supporting calls for a specific user
4094: my ($role,$where)=split(/\./,$ENV{'request.role'});
4095: if ($qualifier eq 'value') {
4096: return $role;
4097: } elsif ($qualifier eq 'extent') {
4098: return $where;
4099: }
4100: # ----------------------------------------------------------------- user.domain
4101: } elsif ($space eq 'domain') {
4102: return $udom;
4103: # ------------------------------------------------------------------- user.name
4104: } elsif ($space eq 'name') {
4105: return $uname;
4106: # ---------------------------------------------------- Any other user namespace
4107: } else {
4108: my %reply;
4109: if (!$publicuser) {
4110: %reply=&get($space,[$qualifierrest],$udom,$uname);
4111: }
4112: return $reply{$qualifierrest};
4113: }
4114: } elsif ($realm eq 'query') {
4115: # ---------------------------------------------- pull stuff out of query string
4116: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
4117: [$spacequalifierrest]);
4118: return $ENV{'form.'.$spacequalifierrest};
4119: } elsif ($realm eq 'request') {
4120: # ------------------------------------------------------------- request.browser
4121: if ($space eq 'browser') {
4122: if ($qualifier eq 'textremote') {
4123: if (&mt('textual_remote_display') eq 'on') {
4124: return 1;
4125: } else {
4126: return 0;
4127: }
4128: } else {
4129: return $ENV{'browser.'.$qualifier};
4130: }
4131: # ------------------------------------------------------------ request.filename
4132: } else {
4133: return $ENV{'request.'.$spacequalifierrest};
4134: }
4135: } elsif ($realm eq 'course') {
4136: # ---------------------------------------------------------- course.description
4137: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
4138: } elsif ($realm eq 'resource') {
4139:
4140: my $section;
4141: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
4142: if (!$symbparm) { $symbparm=&symbread(); }
4143: }
4144: if ($symbparm && defined($courseid) &&
4145: $courseid eq $ENV{'request.course.id'}) {
4146:
4147: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
4148:
4149: # ----------------------------------------------------- Cascading lookup scheme
4150: my $symbp=$symbparm;
4151: my $mapp=(&decode_symb($symbp))[0];
4152:
4153: my $symbparm=$symbp.'.'.$spacequalifierrest;
4154: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
4155:
4156: if (($ENV{'user.name'} eq $uname) &&
4157: ($ENV{'user.domain'} eq $udom)) {
4158: $section=$ENV{'request.course.sec'};
4159: } else {
4160: if (! defined($usection)) {
4161: $section=&getsection($udom,$uname,$courseid);
4162: } else {
4163: $section = $usection;
4164: }
4165: }
4166:
4167: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
4168: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
4169: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
4170:
4171: my $courselevel=$courseid.'.'.$spacequalifierrest;
4172: my $courselevelr=$courseid.'.'.$symbparm;
4173: my $courselevelm=$courseid.'.'.$mapparm;
4174:
4175: # ----------------------------------------------------------- first, check user
4176: #most student don\'t have any data set, check if there is some data
4177: if (! &EXT_cache_status($udom,$uname)) {
4178: my $hashid="$udom:$uname";
4179: my ($result,$cached)=&is_cached(\%userresdatacache,$hashid,
4180: 'userres');
4181: if (!defined($cached)) {
4182: my %resourcedata=&dump('resourcedata',$udom,$uname);
4183: $result=\%resourcedata;
4184: &do_cache(\%userresdatacache,$hashid,$result,'userres');
4185: }
4186: my ($tmp)=keys(%$result);
4187: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4188: if ($$result{$courselevelr}) {
4189: return $$result{$courselevelr}; }
4190: if ($$result{$courselevelm}) {
4191: return $$result{$courselevelm}; }
4192: if ($$result{$courselevel}) {
4193: return $$result{$courselevel}; }
4194: } else {
4195: #error 2 occurs when the .db doesn't exist
4196: if ($tmp!~/error: 2 /) {
4197: &logthis("<font color=blue>WARNING:".
4198: " Trying to get resource data for ".
4199: $uname." at ".$udom.": ".
4200: $tmp."</font>");
4201: } elsif ($tmp=~/error: 2 /) {
4202: &EXT_cache_set($udom,$uname);
4203: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4204: return $tmp;
4205: }
4206: }
4207: }
4208:
4209: # -------------------------------------------------------- second, check course
4210:
4211: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
4212: $ENV{'course.'.$courseid.'.domain'},
4213: ($seclevelr,$seclevelm,$seclevel,
4214: $courselevelr,$courselevelm,
4215: $courselevel));
4216: if (defined($coursereply)) { return $coursereply; }
4217:
4218: # ------------------------------------------------------ third, check map parms
4219: my %parmhash=();
4220: my $thisparm='';
4221: if (tie(%parmhash,'GDBM_File',
4222: $ENV{'request.course.fn'}.'_parms.db',
4223: &GDBM_READER(),0640)) {
4224: $thisparm=$parmhash{$symbparm};
4225: untie(%parmhash);
4226: }
4227: if ($thisparm) { return $thisparm; }
4228: }
4229: # --------------------------------------------- last, look in resource metadata
4230:
4231: $spacequalifierrest=~s/\./\_/;
4232: my $filename;
4233: if (!$symbparm) { $symbparm=&symbread(); }
4234: if ($symbparm) {
4235: $filename=(&decode_symb($symbparm))[2];
4236: } else {
4237: $filename=$ENV{'request.filename'};
4238: }
4239: my $metadata=&metadata($filename,$spacequalifierrest);
4240: if (defined($metadata)) { return $metadata; }
4241: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
4242: if (defined($metadata)) { return $metadata; }
4243:
4244: # ------------------------------------------------------------------ Cascade up
4245: unless ($space eq '0') {
4246: my @parts=split(/_/,$space);
4247: my $id=pop(@parts);
4248: my $part=join('_',@parts);
4249: if ($part eq '') { $part='0'; }
4250: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
4251: $symbparm,$udom,$uname,$section,1);
4252: if (defined($partgeneral)) { return $partgeneral; }
4253: }
4254: if ($recurse) { return undef; }
4255: my $pack_def=&packages_tab_default($filename,$varname);
4256: if (defined($pack_def)) { return $pack_def; }
4257:
4258: # ---------------------------------------------------- Any other user namespace
4259: } elsif ($realm eq 'environment') {
4260: # ----------------------------------------------------------------- environment
4261: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
4262: return $ENV{'environment.'.$spacequalifierrest};
4263: } else {
4264: my %returnhash=&userenvironment($udom,$uname,
4265: $spacequalifierrest);
4266: return $returnhash{$spacequalifierrest};
4267: }
4268: } elsif ($realm eq 'system') {
4269: # ----------------------------------------------------------------- system.time
4270: if ($space eq 'time') {
4271: return time;
4272: }
4273: }
4274: return '';
4275: }
4276:
4277: sub packages_tab_default {
4278: my ($uri,$varname)=@_;
4279: my (undef,$part,$name)=split(/\./,$varname);
4280: my $packages=&metadata($uri,'packages');
4281: foreach my $package (split(/,/,$packages)) {
4282: my ($pack_type,$pack_part)=split(/_/,$package,2);
4283: if (defined($packagetab{"$pack_type&$name&default"})) {
4284: return $packagetab{"$pack_type&$name&default"};
4285: }
4286: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
4287: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
4288: }
4289: }
4290: return undef;
4291: }
4292:
4293: sub add_prefix_and_part {
4294: my ($prefix,$part)=@_;
4295: my $keyroot;
4296: if (defined($prefix) && $prefix !~ /^__/) {
4297: # prefix that has a part already
4298: $keyroot=$prefix;
4299: } elsif (defined($prefix)) {
4300: # prefix that is missing a part
4301: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
4302: } else {
4303: # no prefix at all
4304: if (defined($part)) { $keyroot='_'.$part; }
4305: }
4306: return $keyroot;
4307: }
4308:
4309: # ---------------------------------------------------------------- Get metadata
4310:
4311: sub metadata {
4312: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
4313: $uri=&declutter($uri);
4314: # if it is a non metadata possible uri return quickly
4315: if (($uri eq '') ||
4316: (($uri =~ m|^/*adm/|) &&
4317: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
4318: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
4319: ($uri =~ m|home/[^/]+/public_html/|)) {
4320: return undef;
4321: }
4322: my $filename=$uri;
4323: $uri=~s/\.meta$//;
4324: #
4325: # Is the metadata already cached?
4326: # Look at timestamp of caching
4327: # Everything is cached by the main uri, libraries are never directly cached
4328: #
4329: if (!defined($liburi)) {
4330: my ($result,$cached)=&is_cached(\%metacache,$uri,'meta');
4331: if (defined($cached)) { return $result->{':'.$what}; }
4332: }
4333: {
4334: #
4335: # Is this a recursive call for a library?
4336: #
4337: if (! exists($metacache{$uri})) {
4338: $metacache{$uri}={};
4339: }
4340: if ($liburi) {
4341: $liburi=&declutter($liburi);
4342: $filename=$liburi;
4343: } else {
4344: &devalidate_cache(\%metacache,$uri,'meta');
4345: }
4346: my %metathesekeys=();
4347: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
4348: my $metastring;
4349: if ($uri !~ m|^uploaded/|) {
4350: my $file=&filelocation('',&clutter($filename));
4351: push(@{$metacache{$uri.'.file'}},$file);
4352: $metastring=&getfile($file);
4353: }
4354: my $parser=HTML::LCParser->new(\$metastring);
4355: my $token;
4356: undef %metathesekeys;
4357: while ($token=$parser->get_token) {
4358: if ($token->[0] eq 'S') {
4359: if (defined($token->[2]->{'package'})) {
4360: #
4361: # This is a package - get package info
4362: #
4363: my $package=$token->[2]->{'package'};
4364: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4365: if (defined($token->[2]->{'id'})) {
4366: $keyroot.='_'.$token->[2]->{'id'};
4367: }
4368: if ($metacache{$uri}->{':packages'}) {
4369: $metacache{$uri}->{':packages'}.=','.$package.$keyroot;
4370: } else {
4371: $metacache{$uri}->{':packages'}=$package.$keyroot;
4372: }
4373: foreach (keys %packagetab) {
4374: my $part=$keyroot;
4375: $part=~s/^\_//;
4376: if ($_=~/^\Q$package\E\&/ ||
4377: $_=~/^\Q$package\E_0\&/) {
4378: my ($pack,$name,$subp)=split(/\&/,$_);
4379: # ignore package.tab specified default values
4380: # here &package_tab_default() will fetch those
4381: if ($subp eq 'default') { next; }
4382: my $value=$packagetab{$_};
4383: my $unikey;
4384: if ($pack =~ /_0$/) {
4385: $unikey='parameter_0_'.$name;
4386: $part=0;
4387: } else {
4388: $unikey='parameter'.$keyroot.'_'.$name;
4389: }
4390: if ($subp eq 'display') {
4391: $value.=' [Part: '.$part.']';
4392: }
4393: $metacache{$uri}->{':'.$unikey.'.part'}=$part;
4394: $metathesekeys{$unikey}=1;
4395: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4396: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
4397: }
4398: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4399: $metacache{$uri}->{':'.$unikey}=
4400: $metacache{$uri}->{':'.$unikey.'.default'};
4401: }
4402: }
4403: }
4404: } else {
4405: #
4406: # This is not a package - some other kind of start tag
4407: #
4408: my $entry=$token->[1];
4409: my $unikey;
4410: if ($entry eq 'import') {
4411: $unikey='';
4412: } else {
4413: $unikey=$entry;
4414: }
4415: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4416:
4417: if (defined($token->[2]->{'id'})) {
4418: $unikey.='_'.$token->[2]->{'id'};
4419: }
4420:
4421: if ($entry eq 'import') {
4422: #
4423: # Importing a library here
4424: #
4425: if ($depthcount<20) {
4426: my $location=$parser->get_text('/import');
4427: my $dir=$filename;
4428: $dir=~s|[^/]*$||;
4429: $location=&filelocation($dir,$location);
4430: foreach (sort(split(/\,/,&metadata($uri,'keys',
4431: $location,$unikey,
4432: $depthcount+1)))) {
4433: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
4434: $metathesekeys{$_}=1;
4435: }
4436: }
4437: } else {
4438:
4439: if (defined($token->[2]->{'name'})) {
4440: $unikey.='_'.$token->[2]->{'name'};
4441: }
4442: $metathesekeys{$unikey}=1;
4443: foreach (@{$token->[3]}) {
4444: $metacache{$uri}->{':'.$unikey.'.'.$_}=$token->[2]->{$_};
4445: }
4446: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
4447: my $default=$metacache{$uri}->{':'.$unikey.'.default'};
4448: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
4449: # only ws inside the tag, and not in default, so use default
4450: # as value
4451: $metacache{$uri}->{':'.$unikey}=$default;
4452: } else {
4453: # either something interesting inside the tag or default
4454: # uninteresting
4455: $metacache{$uri}->{':'.$unikey}=$internaltext;
4456: }
4457: # end of not-a-package not-a-library import
4458: }
4459: # end of not-a-package start tag
4460: }
4461: # the next is the end of "start tag"
4462: }
4463: }
4464: my ($extension) = ($uri =~ /\.(\w+)$/);
4465: foreach my $key (sort(keys(%packagetab))) {
4466: #&logthis("extsion1 $extension $key !!");
4467: #no specific packages #how's our extension
4468: if ($key!~/^extension_\Q$extension\E&/) { next; }
4469: &metadata_create_package_def($uri,$key,'extension_'.$extension,
4470: \%metathesekeys);
4471: }
4472: if (!exists($metacache{$uri}->{':packages'})) {
4473: foreach my $key (sort(keys(%packagetab))) {
4474: #no specific packages well let's get default then
4475: if ($key!~/^default&/) { next; }
4476: &metadata_create_package_def($uri,$key,'default',
4477: \%metathesekeys);
4478: }
4479: }
4480: # are there custom rights to evaluate
4481: if ($metacache{$uri}->{':copyright'} eq 'custom') {
4482:
4483: #
4484: # Importing a rights file here
4485: #
4486: unless ($depthcount) {
4487: my $location=$metacache{$uri}->{':customdistributionfile'};
4488: my $dir=$filename;
4489: $dir=~s|[^/]*$||;
4490: $location=&filelocation($dir,$location);
4491: foreach (sort(split(/\,/,&metadata($uri,'keys',
4492: $location,'_rights',
4493: $depthcount+1)))) {
4494: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
4495: $metathesekeys{$_}=1;
4496: }
4497: }
4498: }
4499: $metacache{$uri}->{':keys'}=join(',',keys %metathesekeys);
4500: &metadata_generate_part0(\%metathesekeys,$metacache{$uri},$uri);
4501: $metacache{$uri}->{':allpossiblekeys'}=join(',',keys %metathesekeys);
4502: &do_cache(\%metacache,$uri,$metacache{$uri},'meta');
4503: # this is the end of "was not already recently cached
4504: }
4505: return $metacache{$uri}->{':'.$what};
4506: }
4507:
4508: sub metadata_create_package_def {
4509: my ($uri,$key,$package,$metathesekeys)=@_;
4510: my ($pack,$name,$subp)=split(/\&/,$key);
4511: if ($subp eq 'default') { next; }
4512:
4513: if (defined($metacache{$uri}->{':packages'})) {
4514: $metacache{$uri}->{':packages'}.=','.$package;
4515: } else {
4516: $metacache{$uri}->{':packages'}=$package;
4517: }
4518: my $value=$packagetab{$key};
4519: my $unikey;
4520: $unikey='parameter_0_'.$name;
4521: $metacache{$uri}->{':'.$unikey.'.part'}=0;
4522: $$metathesekeys{$unikey}=1;
4523: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4524: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
4525: }
4526: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4527: $metacache{$uri}->{':'.$unikey}=
4528: $metacache{$uri}->{':'.$unikey.'.default'};
4529: }
4530: }
4531:
4532: sub metadata_generate_part0 {
4533: my ($metadata,$metacache,$uri) = @_;
4534: my %allnames;
4535: foreach my $metakey (sort keys %$metadata) {
4536: if ($metakey=~/^parameter\_(.*)/) {
4537: my $part=$$metacache{':'.$metakey.'.part'};
4538: my $name=$$metacache{':'.$metakey.'.name'};
4539: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
4540: $allnames{$name}=$part;
4541: }
4542: }
4543: }
4544: foreach my $name (keys(%allnames)) {
4545: $$metadata{"parameter_0_$name"}=1;
4546: my $key=":parameter_0_$name";
4547: $$metacache{"$key.part"}='0';
4548: $$metacache{"$key.name"}=$name;
4549: $$metacache{"$key.type"}=$$metacache{':parameter_'.
4550: $allnames{$name}.'_'.$name.
4551: '.type'};
4552: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
4553: '.display'};
4554: my $expr='\\[Part: '.$allnames{$name}.'\\]';
4555: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
4556: $$metacache{"$key.display"}=$olddis;
4557: }
4558: }
4559:
4560: # ------------------------------------------------- Get the title of a resource
4561:
4562: sub gettitle {
4563: my $urlsymb=shift;
4564: my $symb=&symbread($urlsymb);
4565: if ($symb) {
4566: my ($result,$cached)=&is_cached(\%titlecache,$symb,'title',600);
4567: if (defined($cached)) { return $result; }
4568: my ($map,$resid,$url)=&decode_symb($symb);
4569: my $title='';
4570: my %bighash;
4571: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4572: &GDBM_READER(),0640)) {
4573: my $mapid=$bighash{'map_pc_'.&clutter($map)};
4574: $title=$bighash{'title_'.$mapid.'.'.$resid};
4575: untie %bighash;
4576: }
4577: $title=~s/\&colon\;/\:/gs;
4578: if ($title) {
4579: return &do_cache(\%titlecache,$symb,$title,'title');
4580: }
4581: $urlsymb=$url;
4582: }
4583: my $title=&metadata($urlsymb,'title');
4584: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
4585: return $title;
4586: }
4587:
4588: # ------------------------------------------------- Update symbolic store links
4589:
4590: sub symblist {
4591: my ($mapname,%newhash)=@_;
4592: $mapname=&deversion(&declutter($mapname));
4593: my %hash;
4594: if (($ENV{'request.course.fn'}) && (%newhash)) {
4595: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4596: &GDBM_WRCREAT(),0640)) {
4597: foreach (keys %newhash) {
4598: $hash{declutter($_)}=$mapname.'___'.&deversion($newhash{$_});
4599: }
4600: if (untie(%hash)) {
4601: return 'ok';
4602: }
4603: }
4604: }
4605: return 'error';
4606: }
4607:
4608: # --------------------------------------------------------------- Verify a symb
4609:
4610: sub symbverify {
4611: my ($symb,$thisurl)=@_;
4612: my $thisfn=$thisurl;
4613: # wrapper not part of symbs
4614: $thisfn=~s/^\/adm\/wrapper//;
4615: $thisfn=&declutter($thisfn);
4616: # direct jump to resource in page or to a sequence - will construct own symbs
4617: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
4618: # check URL part
4619: my ($map,$resid,$url)=&decode_symb($symb);
4620:
4621: unless ($url eq $thisfn) { return 0; }
4622:
4623: $symb=&symbclean($symb);
4624: $thisurl=&deversion($thisurl);
4625: $thisfn=&deversion($thisfn);
4626:
4627: my %bighash;
4628: my $okay=0;
4629:
4630: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4631: &GDBM_READER(),0640)) {
4632: my $ids=$bighash{'ids_'.&clutter($thisurl)};
4633: unless ($ids) {
4634: $ids=$bighash{'ids_/'.$thisurl};
4635: }
4636: if ($ids) {
4637: # ------------------------------------------------------------------- Has ID(s)
4638: foreach (split(/\,/,$ids)) {
4639: my ($mapid,$resid)=split(/\./,$_);
4640: if (
4641: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
4642: eq $symb) {
4643: $okay=1;
4644: }
4645: }
4646: }
4647: untie(%bighash);
4648: }
4649: return $okay;
4650: }
4651:
4652: # --------------------------------------------------------------- Clean-up symb
4653:
4654: sub symbclean {
4655: my $symb=shift;
4656:
4657: # remove version from map
4658: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
4659:
4660: # remove version from URL
4661: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
4662:
4663: # remove wrapper
4664:
4665: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
4666: return $symb;
4667: }
4668:
4669: # ---------------------------------------------- Split symb to find map and url
4670:
4671: sub encode_symb {
4672: my ($map,$resid,$url)=@_;
4673: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
4674: }
4675:
4676: sub decode_symb {
4677: my ($map,$resid,$url)=split(/\_\_\_/,shift);
4678: return (&fixversion($map),$resid,&fixversion($url));
4679: }
4680:
4681: sub fixversion {
4682: my $fn=shift;
4683: if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
4684: my %bighash;
4685: my $uri=&clutter($fn);
4686: my $key=$ENV{'request.course.id'}.'_'.$uri;
4687: # is this cached?
4688: my ($result,$cached)=&is_cached(\%courseresversioncache,$key,
4689: 'courseresversion',600);
4690: if (defined($cached)) { return $result; }
4691: # unfortunately not cached, or expired
4692: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4693: &GDBM_READER(),0640)) {
4694: if ($bighash{'version_'.$uri}) {
4695: my $version=$bighash{'version_'.$uri};
4696: unless (($version eq 'mostrecent') ||
4697: ($version==&getversion($uri))) {
4698: $uri=~s/\.(\w+)$/\.$version\.$1/;
4699: }
4700: }
4701: untie %bighash;
4702: }
4703: return &do_cache
4704: (\%courseresversioncache,$key,&declutter($uri),'courseresversion');
4705: }
4706:
4707: sub deversion {
4708: my $url=shift;
4709: $url=~s/\.\d+\.(\w+)$/\.$1/;
4710: return $url;
4711: }
4712:
4713: # ------------------------------------------------------ Return symb list entry
4714:
4715: sub symbread {
4716: my ($thisfn,$donotrecurse)=@_;
4717: my $cache_str='request.symbread.cached.'.$thisfn;
4718: if (defined($ENV{$cache_str})) { return $ENV{$cache_str}; }
4719: # no filename provided? try from environment
4720: unless ($thisfn) {
4721: if ($ENV{'request.symb'}) {
4722: return $ENV{$cache_str}=&symbclean($ENV{'request.symb'});
4723: }
4724: $thisfn=$ENV{'request.filename'};
4725: }
4726: # is that filename actually a symb? Verify, clean, and return
4727: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
4728: if (&symbverify($thisfn,$1)) {
4729: return $ENV{$cache_str}=&symbclean($thisfn);
4730: }
4731: }
4732: $thisfn=declutter($thisfn);
4733: my %hash;
4734: my %bighash;
4735: my $syval='';
4736: if (($ENV{'request.course.fn'}) && ($thisfn)) {
4737: my $targetfn = $thisfn;
4738: if ( ($thisfn =~ m/^uploaded\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
4739: $targetfn = 'adm/wrapper/'.$thisfn;
4740: }
4741: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4742: &GDBM_READER(),0640)) {
4743: $syval=$hash{$targetfn};
4744: untie(%hash);
4745: }
4746: # ---------------------------------------------------------- There was an entry
4747: if ($syval) {
4748: unless ($syval=~/\_\d+$/) {
4749: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
4750: &appenv('request.ambiguous' => $thisfn);
4751: return $ENV{$cache_str}='';
4752: }
4753: $syval.=$1;
4754: }
4755: } else {
4756: # ------------------------------------------------------- Was not in symb table
4757: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4758: &GDBM_READER(),0640)) {
4759: # ---------------------------------------------- Get ID(s) for current resource
4760: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4761: unless ($ids) {
4762: $ids=$bighash{'ids_/'.$thisfn};
4763: }
4764: unless ($ids) {
4765: # alias?
4766: $ids=$bighash{'mapalias_'.$thisfn};
4767: }
4768: if ($ids) {
4769: # ------------------------------------------------------------------- Has ID(s)
4770: my @possibilities=split(/\,/,$ids);
4771: if ($#possibilities==0) {
4772: # ----------------------------------------------- There is only one possibility
4773: my ($mapid,$resid)=split(/\./,$ids);
4774: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
4775: } elsif (!$donotrecurse) {
4776: # ------------------------------------------ There is more than one possibility
4777: my $realpossible=0;
4778: foreach (@possibilities) {
4779: my $file=$bighash{'src_'.$_};
4780: if (&allowed('bre',$file)) {
4781: my ($mapid,$resid)=split(/\./,$_);
4782: if ($bighash{'map_type_'.$mapid} ne 'page') {
4783: $realpossible++;
4784: $syval=declutter($bighash{'map_id_'.$mapid}).
4785: '___'.$resid;
4786: }
4787: }
4788: }
4789: if ($realpossible!=1) { $syval=''; }
4790: } else {
4791: $syval='';
4792: }
4793: }
4794: untie(%bighash)
4795: }
4796: }
4797: if ($syval) {
4798: return $ENV{$cache_str}=&symbclean($syval.'___'.$thisfn);
4799: }
4800: }
4801: &appenv('request.ambiguous' => $thisfn);
4802: return $ENV{$cache_str}='';
4803: }
4804:
4805: # ---------------------------------------------------------- Return random seed
4806:
4807: sub numval {
4808: my $txt=shift;
4809: $txt=~tr/A-J/0-9/;
4810: $txt=~tr/a-j/0-9/;
4811: $txt=~tr/K-T/0-9/;
4812: $txt=~tr/k-t/0-9/;
4813: $txt=~tr/U-Z/0-5/;
4814: $txt=~tr/u-z/0-5/;
4815: $txt=~s/\D//g;
4816: return int($txt);
4817: }
4818:
4819: sub numval2 {
4820: my $txt=shift;
4821: $txt=~tr/A-J/0-9/;
4822: $txt=~tr/a-j/0-9/;
4823: $txt=~tr/K-T/0-9/;
4824: $txt=~tr/k-t/0-9/;
4825: $txt=~tr/U-Z/0-5/;
4826: $txt=~tr/u-z/0-5/;
4827: $txt=~s/\D//g;
4828: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
4829: my $total;
4830: foreach my $val (@txts) { $total+=$val; }
4831: return int($total);
4832: }
4833:
4834: sub latest_rnd_algorithm_id {
4835: return '64bit3';
4836: }
4837:
4838: sub get_rand_alg {
4839: my ($courseid)=@_;
4840: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
4841: if ($courseid) {
4842: return $ENV{"course.$courseid.rndseed"};
4843: }
4844: return &latest_rnd_algorithm_id();
4845: }
4846:
4847: sub getCODE {
4848: if (defined($ENV{'form.CODE'})) { return $ENV{'form.CODE'}; }
4849: if (defined($Apache::lonhomework::parsing_a_problem) &&
4850: defined($Apache::lonhomework::history{'resource.CODE'})) {
4851: return $Apache::lonhomework::history{'resource.CODE'};
4852: }
4853: return undef;
4854: }
4855:
4856: sub rndseed {
4857: my ($symb,$courseid,$domain,$username)=@_;
4858:
4859: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
4860: if (!$symb) {
4861: unless ($symb=$wsymb) { return time; }
4862: }
4863: if (!$courseid) { $courseid=$wcourseid; }
4864: if (!$domain) { $domain=$wdomain; }
4865: if (!$username) { $username=$wusername }
4866: my $which=&get_rand_alg();
4867: if (defined(&getCODE())) {
4868: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
4869: } elsif ($which eq '64bit3') {
4870: return &rndseed_64bit3($symb,$courseid,$domain,$username);
4871: } elsif ($which eq '64bit2') {
4872: return &rndseed_64bit2($symb,$courseid,$domain,$username);
4873: } elsif ($which eq '64bit') {
4874: return &rndseed_64bit($symb,$courseid,$domain,$username);
4875: }
4876: return &rndseed_32bit($symb,$courseid,$domain,$username);
4877: }
4878:
4879: sub rndseed_32bit {
4880: my ($symb,$courseid,$domain,$username)=@_;
4881: {
4882: use integer;
4883: my $symbchck=unpack("%32C*",$symb) << 27;
4884: my $symbseed=numval($symb) << 22;
4885: my $namechck=unpack("%32C*",$username) << 17;
4886: my $nameseed=numval($username) << 12;
4887: my $domainseed=unpack("%32C*",$domain) << 7;
4888: my $courseseed=unpack("%32C*",$courseid);
4889: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
4890: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4891: #&Apache::lonxml::debug("rndseed :$num:$symb");
4892: return $num;
4893: }
4894: }
4895:
4896: sub rndseed_64bit {
4897: my ($symb,$courseid,$domain,$username)=@_;
4898: {
4899: use integer;
4900: my $symbchck=unpack("%32S*",$symb) << 21;
4901: my $symbseed=numval($symb) << 10;
4902: my $namechck=unpack("%32S*",$username);
4903:
4904: my $nameseed=numval($username) << 21;
4905: my $domainseed=unpack("%32S*",$domain) << 10;
4906: my $courseseed=unpack("%32S*",$courseid);
4907:
4908: my $num1=$symbchck+$symbseed+$namechck;
4909: my $num2=$nameseed+$domainseed+$courseseed;
4910: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4911: #&Apache::lonxml::debug("rndseed :$num:$symb");
4912: return "$num1,$num2";
4913: }
4914: }
4915:
4916: sub rndseed_64bit2 {
4917: my ($symb,$courseid,$domain,$username)=@_;
4918: {
4919: use integer;
4920: # strings need to be an even # of cahracters long, it it is odd the
4921: # last characters gets thrown away
4922: my $symbchck=unpack("%32S*",$symb.' ') << 21;
4923: my $symbseed=numval($symb) << 10;
4924: my $namechck=unpack("%32S*",$username.' ');
4925:
4926: my $nameseed=numval($username) << 21;
4927: my $domainseed=unpack("%32S*",$domain.' ') << 10;
4928: my $courseseed=unpack("%32S*",$courseid.' ');
4929:
4930: my $num1=$symbchck+$symbseed+$namechck;
4931: my $num2=$nameseed+$domainseed+$courseseed;
4932: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4933: #&Apache::lonxml::debug("rndseed :$num:$symb");
4934: return "$num1,$num2";
4935: }
4936: }
4937:
4938: sub rndseed_64bit3 {
4939: my ($symb,$courseid,$domain,$username)=@_;
4940: {
4941: use integer;
4942: # strings need to be an even # of cahracters long, it it is odd the
4943: # last characters gets thrown away
4944: my $symbchck=unpack("%32S*",$symb.' ') << 21;
4945: my $symbseed=numval2($symb) << 10;
4946: my $namechck=unpack("%32S*",$username.' ');
4947:
4948: my $nameseed=numval2($username) << 21;
4949: my $domainseed=unpack("%32S*",$domain.' ') << 10;
4950: my $courseseed=unpack("%32S*",$courseid.' ');
4951:
4952: my $num1=$symbchck+$symbseed+$namechck;
4953: my $num2=$nameseed+$domainseed+$courseseed;
4954: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4955: #&Apache::lonxml::debug("rndseed :$num:$symb");
4956: return "$num1:$num2";
4957: }
4958: }
4959:
4960: sub rndseed_CODE_64bit {
4961: my ($symb,$courseid,$domain,$username)=@_;
4962: {
4963: use integer;
4964: my $symbchck=unpack("%32S*",$symb.' ') << 16;
4965: my $symbseed=numval2($symb);
4966: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
4967: my $CODEseed=numval(&getCODE());
4968: my $courseseed=unpack("%32S*",$courseid.' ');
4969: my $num1=$symbseed+$CODEchck;
4970: my $num2=$CODEseed+$courseseed+$symbchck;
4971: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
4972: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
4973: return "$num1:$num2";
4974: }
4975: }
4976:
4977: sub setup_random_from_rndseed {
4978: my ($rndseed)=@_;
4979: if ($rndseed =~/([,:])/) {
4980: my ($num1,$num2)=split(/[,:]/,$rndseed);
4981: &Math::Random::random_set_seed(abs($num1),abs($num2));
4982: } else {
4983: &Math::Random::random_set_seed_from_phrase($rndseed);
4984: }
4985: }
4986:
4987: sub latest_receipt_algorithm_id {
4988: return 'receipt2';
4989: }
4990:
4991: sub recunique {
4992: my $fucourseid=shift;
4993: my $unique;
4994: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
4995: $unique=$ENV{"course.$fucourseid.internal.encseed"};
4996: } else {
4997: $unique=$perlvar{'lonReceipt'};
4998: }
4999: return unpack("%32C*",$unique);
5000: }
5001:
5002: sub recprefix {
5003: my $fucourseid=shift;
5004: my $prefix;
5005: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5006: $prefix=$ENV{"course.$fucourseid.internal.encpref"};
5007: } else {
5008: $prefix=$perlvar{'lonHostID'};
5009: }
5010: return unpack("%32C*",$prefix);
5011: }
5012:
5013: sub ireceipt {
5014: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
5015: my $cuname=unpack("%32C*",$funame);
5016: my $cudom=unpack("%32C*",$fudom);
5017: my $cucourseid=unpack("%32C*",$fucourseid);
5018: my $cusymb=unpack("%32C*",$fusymb);
5019: my $cunique=&recunique($fucourseid);
5020: my $cpart=unpack("%32S*",$part);
5021: my $return =&recprefix($fucourseid).'-';
5022: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
5023: $ENV{'request.state'} eq 'construct') {
5024: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
5025: " and ".($cpart%$cudom));
5026:
5027: $return.= ($cunique%$cuname+
5028: $cunique%$cudom+
5029: $cusymb%$cuname+
5030: $cusymb%$cudom+
5031: $cucourseid%$cuname+
5032: $cucourseid%$cudom+
5033: $cpart%$cuname+
5034: $cpart%$cudom);
5035: } else {
5036: $return.= ($cunique%$cuname+
5037: $cunique%$cudom+
5038: $cusymb%$cuname+
5039: $cusymb%$cudom+
5040: $cucourseid%$cuname+
5041: $cucourseid%$cudom);
5042: }
5043: return $return;
5044: }
5045:
5046: sub receipt {
5047: my ($part)=@_;
5048: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
5049: return &ireceipt($name,$domain,$courseid,$symb,$part);
5050: }
5051:
5052: # ------------------------------------------------------------ Serves up a file
5053: # returns either the contents of the file or
5054: # -1 if the file doesn't exist
5055: #
5056: # if the target is a file that was uploaded via DOCS,
5057: # a check will be made to see if a current copy exists on the local server,
5058: # if it does this will be served, otherwise a copy will be retrieved from
5059: # the home server for the course and stored in /home/httpd/html/userfiles on
5060: # the local server.
5061:
5062: sub getfile {
5063: my ($file) = @_;
5064:
5065: if ($file =~ m|^/*uploaded/|) { $file=&filelocation("",$file); }
5066: &repcopy($file);
5067: return &readfile($file);
5068: }
5069:
5070: sub repcopy_userfile {
5071: my ($file)=@_;
5072:
5073: if ($file =~ m|^/*uploaded/|) { $file=&filelocation("",$file); }
5074: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return OK; }
5075:
5076: my ($cdom,$cnum,$filename) =
5077: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
5078: my ($info,$rtncode);
5079: my $uri="/uploaded/$cdom/$cnum/$filename";
5080: if (-e "$file") {
5081: my @fileinfo = stat($file);
5082: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
5083: if ($lwpresp ne 'ok') {
5084: if ($rtncode eq '404') {
5085: unlink($file);
5086: }
5087: #my $ua=new LWP::UserAgent;
5088: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5089: #my $response=$ua->request($request);
5090: #if ($response->is_success()) {
5091: # return $response->content;
5092: # } else {
5093: # return -1;
5094: # }
5095: return -1;
5096: }
5097: if ($info < $fileinfo[9]) {
5098: return OK;
5099: }
5100: $info = '';
5101: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5102: if ($lwpresp ne 'ok') {
5103: return -1;
5104: }
5105: } else {
5106: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5107: if ($lwpresp ne 'ok') {
5108: my $ua=new LWP::UserAgent;
5109: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5110: my $response=$ua->request($request);
5111: if ($response->is_success()) {
5112: $info=$response->content;
5113: } else {
5114: return -1;
5115: }
5116: }
5117: my @parts = ($cdom,$cnum);
5118: if ($filename =~ m|^(.+)/[^/]+$|) {
5119: push @parts, split(/\//,$1);
5120: }
5121: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
5122: foreach my $part (@parts) {
5123: $path .= '/'.$part;
5124: if (!-e $path) {
5125: mkdir($path,0770);
5126: }
5127: }
5128: }
5129: open(FILE,">$file");
5130: print FILE $info;
5131: close(FILE);
5132: return OK;
5133: }
5134:
5135: sub tokenwrapper {
5136: my $uri=shift;
5137: $uri=~s|^http\://([^/]+)||;
5138: $uri=~s|^/||;
5139: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
5140: my $token=$1;
5141: my (undef,$udom,$uname,$file)=split('/',$uri,4);
5142: if ($udom && $uname && $file) {
5143: $file=~s|(\?\.*)*$||;
5144: &appenv("userfile.$udom/$uname/$file" => $ENV{'request.course.id'});
5145: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
5146: (($uri=~/\?/)?'&':'?').'token='.$token.
5147: '&tokenissued='.$perlvar{'lonHostID'};
5148: } else {
5149: return '/adm/notfound.html';
5150: }
5151: }
5152:
5153: sub getuploaded {
5154: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
5155: $uri=~s/^\///;
5156: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
5157: my $ua=new LWP::UserAgent;
5158: my $request=new HTTP::Request($reqtype,$uri);
5159: my $response=$ua->request($request);
5160: $$rtncode = $response->code;
5161: if (! $response->is_success()) {
5162: return 'failed';
5163: }
5164: if ($reqtype eq 'HEAD') {
5165: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
5166: } elsif ($reqtype eq 'GET') {
5167: $$info = $response->content;
5168: }
5169: return 'ok';
5170: }
5171:
5172: sub readfile {
5173: my $file = shift;
5174: if ( (! -e $file ) || ($file eq '') ) { return -1; };
5175: my $fh;
5176: open($fh,"<$file");
5177: my $a='';
5178: while (<$fh>) { $a .=$_; }
5179: return $a;
5180: }
5181:
5182: sub filelocation {
5183: my ($dir,$file) = @_;
5184: my $location;
5185: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
5186: if ($file=~m:^/~:) { # is a contruction space reference
5187: $location = $file;
5188: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
5189: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
5190: my ($udom,$uname,$filename)=
5191: ($file=~m|^/+uploaded/+([^/]+)/+([^/]+)/+(.*)$|);
5192: my $home=&homeserver($uname,$udom);
5193: my $is_me=0;
5194: my @ids=¤t_machine_ids();
5195: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
5196: if ($is_me) {
5197: $location=&Apache::loncommon::propath($udom,$uname).
5198: '/userfiles/'.$filename;
5199: } else {
5200: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
5201: $udom.'/'.$uname.'/'.$filename;
5202: }
5203: } else {
5204: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5205: $file=~s:^/res/:/:;
5206: if ( !( $file =~ m:^/:) ) {
5207: $location = $dir. '/'.$file;
5208: } else {
5209: $location = '/home/httpd/html/res'.$file;
5210: }
5211: }
5212: $location=~s://+:/:g; # remove duplicate /
5213: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
5214: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
5215: return $location;
5216: }
5217:
5218: sub hreflocation {
5219: my ($dir,$file)=@_;
5220: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
5221: my $finalpath=filelocation($dir,$file);
5222: $finalpath=~s-^/home/httpd/html--;
5223: $finalpath=~s-^/home/(\w+)/public_html/-/~$1/-;
5224: return $finalpath;
5225: } elsif ($file=~m-^/home-) {
5226: $file=~s-^/home/httpd/html--;
5227: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
5228: return $file;
5229: }
5230: return $file;
5231: }
5232:
5233: sub current_machine_domains {
5234: my $hostname=$hostname{$perlvar{'lonHostID'}};
5235: my @domains;
5236: while( my($id, $name) = each(%hostname)) {
5237: # &logthis("-$id-$name-$hostname-");
5238: if ($hostname eq $name) {
5239: push(@domains,$hostdom{$id});
5240: }
5241: }
5242: return @domains;
5243: }
5244:
5245: sub current_machine_ids {
5246: my $hostname=$hostname{$perlvar{'lonHostID'}};
5247: my @ids;
5248: while( my($id, $name) = each(%hostname)) {
5249: # &logthis("-$id-$name-$hostname-");
5250: if ($hostname eq $name) {
5251: push(@ids,$id);
5252: }
5253: }
5254: return @ids;
5255: }
5256:
5257: # ------------------------------------------------------------- Declutters URLs
5258:
5259: sub declutter {
5260: my $thisfn=shift;
5261: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5262: $thisfn=~s/^\///;
5263: $thisfn=~s/^res\///;
5264: $thisfn=~s/\?.+$//;
5265: return $thisfn;
5266: }
5267:
5268: # ------------------------------------------------------------- Clutter up URLs
5269:
5270: sub clutter {
5271: my $thisfn='/'.&declutter(shift);
5272: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv|public)\//) {
5273: $thisfn='/res'.$thisfn;
5274: }
5275: return $thisfn;
5276: }
5277:
5278: sub freeze_escape {
5279: my ($value)=@_;
5280: if (ref($value)) {
5281: $value=&nfreeze($value);
5282: return '__FROZEN__'.&escape($value);
5283: }
5284: return &escape($value);
5285: }
5286:
5287: # -------------------------------------------------------- Escape Special Chars
5288:
5289: sub escape {
5290: my $str=shift;
5291: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
5292: return $str;
5293: }
5294:
5295: # ----------------------------------------------------- Un-Escape Special Chars
5296:
5297: sub unescape {
5298: my $str=shift;
5299: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
5300: return $str;
5301: }
5302:
5303: sub thaw_unescape {
5304: my ($value)=@_;
5305: if ($value =~ /^__FROZEN__/) {
5306: substr($value,0,10,undef);
5307: $value=&unescape($value);
5308: return &thaw($value);
5309: }
5310: return &unescape($value);
5311: }
5312:
5313: sub mod_perl_version {
5314: if (defined($perlvar{'MODPERL2'})) {
5315: return 2;
5316: }
5317: return 1;
5318: }
5319:
5320: sub correct_line_ends {
5321: my ($result)=@_;
5322: $$result =~s/\r\n/\n/mg;
5323: $$result =~s/\r/\n/mg;
5324: }
5325: # ================================================================ Main Program
5326:
5327: sub goodbye {
5328: &logthis("Starting Shut down");
5329: #not converted to using infrastruture and probably shouldn't be
5330: &logthis(sprintf("%-20s is %s",'%badServerCache',scalar(%badServerCache)));
5331: #converted
5332: &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
5333: &logthis(sprintf("%-20s is %s",'%homecache',scalar(%homecache)));
5334: &logthis(sprintf("%-20s is %s",'%titlecache',scalar(%titlecache)));
5335: &logthis(sprintf("%-20s is %s",'%courseresdatacache',scalar(%courseresdatacache)));
5336: #1.1 only
5337: &logthis(sprintf("%-20s is %s",'%userresdatacache',scalar(%userresdatacache)));
5338: &logthis(sprintf("%-20s is %s",'%getsectioncache',scalar(%getsectioncache)));
5339: &logthis(sprintf("%-20s is %s",'%courseresversioncache',scalar(%courseresversioncache)));
5340: &logthis(sprintf("%-20s is %s",'%resversioncache',scalar(%resversioncache)));
5341: &flushcourselogs();
5342: &logthis("Shutting down");
5343: return DONE;
5344: }
5345:
5346: BEGIN {
5347: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
5348: unless ($readit) {
5349: {
5350: open(my $config,"</etc/httpd/conf/loncapa.conf");
5351:
5352: while (my $configline=<$config>) {
5353: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
5354: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5355: chomp($varvalue);
5356: $perlvar{$varname}=$varvalue;
5357: }
5358: }
5359: close($config);
5360: }
5361: {
5362: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
5363:
5364: while (my $configline=<$config>) {
5365: if ($configline =~ /^[^\#]*PerlSetVar/) {
5366: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5367: chomp($varvalue);
5368: $perlvar{$varname}=$varvalue;
5369: }
5370: }
5371: close($config);
5372: }
5373:
5374: # ------------------------------------------------------------ Read domain file
5375: {
5376: %domaindescription = ();
5377: %domain_auth_def = ();
5378: %domain_auth_arg_def = ();
5379: my $fh;
5380: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
5381: while (<$fh>) {
5382: next if (/^(\#|\s*$)/);
5383: # next if /^\#/;
5384: chomp;
5385: my ($domain, $domain_description, $def_auth, $def_auth_arg,
5386: $def_lang, $city, $longi, $lati) = split(/:/,$_);
5387: $domain_auth_def{$domain}=$def_auth;
5388: $domain_auth_arg_def{$domain}=$def_auth_arg;
5389: $domaindescription{$domain}=$domain_description;
5390: $domain_lang_def{$domain}=$def_lang;
5391: $domain_city{$domain}=$city;
5392: $domain_longi{$domain}=$longi;
5393: $domain_lati{$domain}=$lati;
5394:
5395: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
5396: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
5397: }
5398: }
5399: close ($fh);
5400: }
5401:
5402:
5403: # ------------------------------------------------------------- Read hosts file
5404: {
5405: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
5406:
5407: while (my $configline=<$config>) {
5408: next if ($configline =~ /^(\#|\s*$)/);
5409: chomp($configline);
5410: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
5411: if ($id && $domain && $role && $name && $ip) {
5412: $hostname{$id}=$name;
5413: $hostdom{$id}=$domain;
5414: $hostip{$id}=$ip;
5415: $iphost{$ip}=$id;
5416: if ($role eq 'library') { $libserv{$id}=$name; }
5417: }
5418: }
5419: close($config);
5420: }
5421:
5422: # ------------------------------------------------------ Read spare server file
5423: {
5424: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
5425:
5426: while (my $configline=<$config>) {
5427: chomp($configline);
5428: if ($configline) {
5429: $spareid{$configline}=1;
5430: }
5431: }
5432: close($config);
5433: }
5434: # ------------------------------------------------------------ Read permissions
5435: {
5436: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
5437:
5438: while (my $configline=<$config>) {
5439: chomp($configline);
5440: if ($configline) {
5441: my ($role,$perm)=split(/ /,$configline);
5442: if ($perm ne '') { $pr{$role}=$perm; }
5443: }
5444: }
5445: close($config);
5446: }
5447:
5448: # -------------------------------------------- Read plain texts for permissions
5449: {
5450: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
5451:
5452: while (my $configline=<$config>) {
5453: chomp($configline);
5454: if ($configline) {
5455: my ($short,$plain)=split(/:/,$configline);
5456: if ($plain ne '') { $prp{$short}=$plain; }
5457: }
5458: }
5459: close($config);
5460: }
5461:
5462: # ---------------------------------------------------------- Read package table
5463: {
5464: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
5465:
5466: while (my $configline=<$config>) {
5467: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
5468: chomp($configline);
5469: my ($short,$plain)=split(/:/,$configline);
5470: my ($pack,$name)=split(/\&/,$short);
5471: if ($plain ne '') {
5472: $packagetab{$pack.'&'.$name.'&name'}=$name;
5473: $packagetab{$short}=$plain;
5474: }
5475: }
5476: close($config);
5477: }
5478:
5479: # ------------- set up temporary directory
5480: {
5481: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
5482:
5483: }
5484:
5485: %metacache=();
5486:
5487: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
5488: $dumpcount=0;
5489:
5490: &logtouch();
5491: &logthis('<font color=yellow>INFO: Read configuration</font>');
5492: $readit=1;
5493: }
5494: }
5495:
5496: 1;
5497: __END__
5498:
5499: =pod
5500:
5501: =head1 NAME
5502:
5503: Apache::lonnet - Subroutines to ask questions about things in the network.
5504:
5505: =head1 SYNOPSIS
5506:
5507: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
5508:
5509: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
5510:
5511: Common parameters:
5512:
5513: =over 4
5514:
5515: =item *
5516:
5517: $uname : an internal username (if $cname expecting a course Id specifically)
5518:
5519: =item *
5520:
5521: $udom : a domain (if $cdom expecting a course's domain specifically)
5522:
5523: =item *
5524:
5525: $symb : a resource instance identifier
5526:
5527: =item *
5528:
5529: $namespace : the name of a .db file that contains the data needed or
5530: being set.
5531:
5532: =back
5533:
5534: =head1 OVERVIEW
5535:
5536: lonnet provides subroutines which interact with the
5537: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
5538: about classes, users, and resources.
5539:
5540: For many of these objects you can also use this to store data about
5541: them or modify them in various ways.
5542:
5543: =head2 Symbs
5544:
5545: To identify a specific instance of a resource, LON-CAPA uses symbols
5546: or "symbs"X<symb>. These identifiers are built from the URL of the
5547: map, the resource number of the resource in the map, and the URL of
5548: the resource itself. The latter is somewhat redundant, but might help
5549: if maps change.
5550:
5551: An example is
5552:
5553: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
5554:
5555: The respective map entry is
5556:
5557: <resource id="19" src="/res/msu/korte/tests/part12.problem"
5558: title="Problem 2">
5559: </resource>
5560:
5561: Symbs are used by the random number generator, as well as to store and
5562: restore data specific to a certain instance of for example a problem.
5563:
5564: =head2 Storing And Retrieving Data
5565:
5566: X<store()>X<cstore()>X<restore()>Three of the most important functions
5567: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
5568: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
5569: is is the non-critical message twin of cstore. These functions are for
5570: handlers to store a perl hash to a user's permanent data space in an
5571: easy manner, and to retrieve it again on another call. It is expected
5572: that a handler would use this once at the beginning to retrieve data,
5573: and then again once at the end to send only the new data back.
5574:
5575: The data is stored in the user's data directory on the user's
5576: homeserver under the ID of the course.
5577:
5578: The hash that is returned by restore will have all of the previous
5579: value for all of the elements of the hash.
5580:
5581: Example:
5582:
5583: #creating a hash
5584: my %hash;
5585: $hash{'foo'}='bar';
5586:
5587: #storing it
5588: &Apache::lonnet::cstore(\%hash);
5589:
5590: #changing a value
5591: $hash{'foo'}='notbar';
5592:
5593: #adding a new value
5594: $hash{'bar'}='foo';
5595: &Apache::lonnet::cstore(\%hash);
5596:
5597: #retrieving the hash
5598: my %history=&Apache::lonnet::restore();
5599:
5600: #print the hash
5601: foreach my $key (sort(keys(%history))) {
5602: print("\%history{$key} = $history{$key}");
5603: }
5604:
5605: Will print out:
5606:
5607: %history{1:foo} = bar
5608: %history{1:keys} = foo:timestamp
5609: %history{1:timestamp} = 990455579
5610: %history{2:bar} = foo
5611: %history{2:foo} = notbar
5612: %history{2:keys} = foo:bar:timestamp
5613: %history{2:timestamp} = 990455580
5614: %history{bar} = foo
5615: %history{foo} = notbar
5616: %history{timestamp} = 990455580
5617: %history{version} = 2
5618:
5619: Note that the special hash entries C<keys>, C<version> and
5620: C<timestamp> were added to the hash. C<version> will be equal to the
5621: total number of versions of the data that have been stored. The
5622: C<timestamp> attribute will be the UNIX time the hash was
5623: stored. C<keys> is available in every historical section to list which
5624: keys were added or changed at a specific historical revision of a
5625: hash.
5626:
5627: B<Warning>: do not store the hash that restore returns directly. This
5628: will cause a mess since it will restore the historical keys as if the
5629: were new keys. I.E. 1:foo will become 1:1:foo etc.
5630:
5631: Calling convention:
5632:
5633: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
5634: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
5635:
5636: For more detailed information, see lonnet specific documentation.
5637:
5638: =head1 RETURN MESSAGES
5639:
5640: =over 4
5641:
5642: =item * B<con_lost>: unable to contact remote host
5643:
5644: =item * B<con_delayed>: unable to contact remote host, message will be delivered
5645: when the connection is brought back up
5646:
5647: =item * B<con_failed>: unable to contact remote host and unable to save message
5648: for later delivery
5649:
5650: =item * B<error:>: an error a occured, a description of the error follows the :
5651:
5652: =item * B<no_such_host>: unable to fund a host associated with the user/domain
5653: that was requested
5654:
5655: =back
5656:
5657: =head1 PUBLIC SUBROUTINES
5658:
5659: =head2 Session Environment Functions
5660:
5661: =over 4
5662:
5663: =item *
5664: X<appenv()>
5665: B<appenv(%hash)>: the value of %hash is written to
5666: the user envirnoment file, and will be restored for each access this
5667: user makes during this session, also modifies the %ENV for the current
5668: process
5669:
5670: =item *
5671: X<delenv()>
5672: B<delenv($regexp)>: removes all items from the session
5673: environment file that matches the regular expression in $regexp. The
5674: values are also delted from the current processes %ENV.
5675:
5676: =back
5677:
5678: =head2 User Information
5679:
5680: =over 4
5681:
5682: =item *
5683: X<queryauthenticate()>
5684: B<queryauthenticate($uname,$udom)>: try to determine user's current
5685: authentication scheme
5686:
5687: =item *
5688: X<authenticate()>
5689: B<authenticate($uname,$upass,$udom)>: try to
5690: authenticate user from domain's lib servers (first use the current
5691: one). C<$upass> should be the users password.
5692:
5693: =item *
5694: X<homeserver()>
5695: B<homeserver($uname,$udom)>: find the server which has
5696: the user's directory and files (there must be only one), this caches
5697: the answer, and also caches if there is a borken connection.
5698:
5699: =item *
5700: X<idget()>
5701: B<idget($udom,@ids)>: find the usernames behind a list of IDs
5702: (IDs are a unique resource in a domain, there must be only 1 ID per
5703: username, and only 1 username per ID in a specific domain) (returns
5704: hash: id=>name,id=>name)
5705:
5706: =item *
5707: X<idrget()>
5708: B<idrget($udom,@unames)>: find the IDs behind a list of
5709: usernames (returns hash: name=>id,name=>id)
5710:
5711: =item *
5712: X<idput()>
5713: B<idput($udom,%ids)>: store away a list of names and associated IDs
5714:
5715: =item *
5716: X<rolesinit()>
5717: B<rolesinit($udom,$username,$authhost)>: get user privileges
5718:
5719: =item *
5720: X<getsection()>
5721: B<getsection($udom,$uname,$cname)>: finds the section of student in the
5722: course $cname, return section name/number or '' for "not in course"
5723: and '-1' for "no section"
5724:
5725: =item *
5726: X<userenvironment()>
5727: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
5728: passed in @what from the requested user's environment, returns a hash
5729:
5730: =back
5731:
5732: =head2 User Roles
5733:
5734: =over 4
5735:
5736: =item *
5737:
5738: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
5739: actions
5740: F: full access
5741: U,I,K: authentication modes (cxx only)
5742: '': forbidden
5743: 1: user needs to choose course
5744: 2: browse allowed
5745:
5746: =item *
5747:
5748: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
5749: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
5750: and course level
5751:
5752: =item *
5753:
5754: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
5755: explanation of a user role term
5756:
5757: =back
5758:
5759: =head2 User Modification
5760:
5761: =over 4
5762:
5763: =item *
5764:
5765: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
5766: user for the level given by URL. Optional start and end dates (leave empty
5767: string or zero for "no date")
5768:
5769: =item *
5770:
5771: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
5772: change a users, password, possible return values are: ok,
5773: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
5774: refused
5775:
5776: =item *
5777:
5778: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
5779:
5780: =item *
5781:
5782: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
5783: modify user
5784:
5785: =item *
5786:
5787: modifystudent
5788:
5789: modify a students enrollment and identification information.
5790: The course id is resolved based on the current users environment.
5791: This means the envoking user must be a course coordinator or otherwise
5792: associated with a course.
5793:
5794: This call is essentially a wrapper for lonnet::modifyuser and
5795: lonnet::modify_student_enrollment
5796:
5797: Inputs:
5798:
5799: =over 4
5800:
5801: =item B<$udom> Students loncapa domain
5802:
5803: =item B<$uname> Students loncapa login name
5804:
5805: =item B<$uid> Students id/student number
5806:
5807: =item B<$umode> Students authentication mode
5808:
5809: =item B<$upass> Students password
5810:
5811: =item B<$first> Students first name
5812:
5813: =item B<$middle> Students middle name
5814:
5815: =item B<$last> Students last name
5816:
5817: =item B<$gene> Students generation
5818:
5819: =item B<$usec> Students section in course
5820:
5821: =item B<$end> Unix time of the roles expiration
5822:
5823: =item B<$start> Unix time of the roles start date
5824:
5825: =item B<$forceid> If defined, allow $uid to be changed
5826:
5827: =item B<$desiredhome> server to use as home server for student
5828:
5829: =back
5830:
5831: =item *
5832:
5833: modify_student_enrollment
5834:
5835: Change a students enrollment status in a class. The environment variable
5836: 'role.request.course' must be defined for this function to proceed.
5837:
5838: Inputs:
5839:
5840: =over 4
5841:
5842: =item $udom, students domain
5843:
5844: =item $uname, students name
5845:
5846: =item $uid, students user id
5847:
5848: =item $first, students first name
5849:
5850: =item $middle
5851:
5852: =item $last
5853:
5854: =item $gene
5855:
5856: =item $usec
5857:
5858: =item $end
5859:
5860: =item $start
5861:
5862: =back
5863:
5864:
5865: =item *
5866:
5867: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
5868: custom role; give a custom role to a user for the level given by URL. Specify
5869: name and domain of role author, and role name
5870:
5871: =item *
5872:
5873: revokerole($udom,$uname,$url,$role) : revoke a role for url
5874:
5875: =item *
5876:
5877: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
5878:
5879: =back
5880:
5881: =head2 Course Infomation
5882:
5883: =over 4
5884:
5885: =item *
5886:
5887: coursedescription($courseid) : course description
5888:
5889: =item *
5890:
5891: courseresdata($coursenum,$coursedomain,@which) : request for current
5892: parameter setting for a specific course, @what should be a list of
5893: parameters to ask about. This routine caches answers for 5 minutes.
5894:
5895: =back
5896:
5897: =head2 Course Modification
5898:
5899: =over 4
5900:
5901: =item *
5902:
5903: writecoursepref($courseid,%prefs) : write preferences (environment
5904: database) for a course
5905:
5906: =item *
5907:
5908: createcourse($udom,$description,$url) : make/modify course
5909:
5910: =back
5911:
5912: =head2 Resource Subroutines
5913:
5914: =over 4
5915:
5916: =item *
5917:
5918: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
5919:
5920: =item *
5921:
5922: repcopy($filename) : subscribes to the requested file, and attempts to
5923: replicate from the owning library server, Might return
5924: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
5925: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
5926: resource. Expects the local filesystem pathname
5927: (/home/httpd/html/res/....)
5928:
5929: =back
5930:
5931: =head2 Resource Information
5932:
5933: =over 4
5934:
5935: =item *
5936:
5937: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
5938: a vairety of different possible values, $varname should be a request
5939: string, and the other parameters can be used to specify who and what
5940: one is asking about.
5941:
5942: Possible values for $varname are environment.lastname (or other item
5943: from the envirnment hash), user.name (or someother aspect about the
5944: user), resource.0.maxtries (or some other part and parameter of a
5945: resource)
5946:
5947: =item *
5948:
5949: directcondval($number) : get current value of a condition; reads from a state
5950: string
5951:
5952: =item *
5953:
5954: condval($condidx) : value of condition index based on state
5955:
5956: =item *
5957:
5958: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
5959: resource's metadata, $what should be either a specific key, or either
5960: 'keys' (to get a list of possible keys) or 'packages' to get a list of
5961: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
5962:
5963: this function automatically caches all requests
5964:
5965: =item *
5966:
5967: metadata_query($query,$custom,$customshow) : make a metadata query against the
5968: network of library servers; returns file handle of where SQL and regex results
5969: will be stored for query
5970:
5971: =item *
5972:
5973: symbread($filename) : return symbolic list entry (filename argument optional);
5974: returns the data handle
5975:
5976: =item *
5977:
5978: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
5979: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
5980: failure, user must be in a course, as it assumes the existance of the
5981: course initi hash, and uses $ENV('request.course.id'}
5982:
5983:
5984: =item *
5985:
5986: symbclean($symb) : removes versions numbers from a symb, returns the
5987: cleaned symb
5988:
5989: =item *
5990:
5991: is_on_map($uri) : checks if the $uri is somewhere on the current
5992: course map, user must be in a course for it to work.
5993:
5994: =item *
5995:
5996: numval($salt) : return random seed value (addend for rndseed)
5997:
5998: =item *
5999:
6000: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
6001: a random seed, all arguments are optional, if they aren't sent it uses the
6002: environment to derive them. Note: if symb isn't sent and it can't get one
6003: from &symbread it will use the current time as its return value
6004:
6005: =item *
6006:
6007: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
6008: unfakeable, receipt
6009:
6010: =item *
6011:
6012: receipt() : API to ireceipt working off of ENV values; given out to users
6013:
6014: =item *
6015:
6016: countacc($url) : count the number of accesses to a given URL
6017:
6018: =item *
6019:
6020: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
6021:
6022: =item *
6023:
6024: checkin($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 $tcrsid)
6025:
6026: =item *
6027:
6028: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
6029:
6030: =item *
6031:
6032: devalidate($symb) : devalidate temporary spreadsheet calculations,
6033: forcing spreadsheet to reevaluate the resource scores next time.
6034:
6035: =back
6036:
6037: =head2 Storing/Retreiving Data
6038:
6039: =over 4
6040:
6041: =item *
6042:
6043: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
6044: for this url; hashref needs to be given and should be a \%hashname; the
6045: remaining args aren't required and if they aren't passed or are '' they will
6046: be derived from the ENV
6047:
6048: =item *
6049:
6050: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
6051: uses critical subroutine
6052:
6053: =item *
6054:
6055: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
6056: all args are optional
6057:
6058: =item *
6059:
6060: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
6061: works very similar to store/cstore, but all data is stored in a
6062: temporary location and can be reset using tmpreset, $storehash should
6063: be a hash reference, returns nothing on success
6064:
6065: =item *
6066:
6067: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
6068: similar to restore, but all data is stored in a temporary location and
6069: can be reset using tmpreset. Returns a hash of values on success,
6070: error string otherwise.
6071:
6072: =item *
6073:
6074: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
6075: deltes all keys for $symb form the temporary storage hash.
6076:
6077: =item *
6078:
6079: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6080: reference filled in from namesp ($udom and $uname are optional)
6081:
6082: =item *
6083:
6084: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
6085: namesp ($udom and $uname are optional)
6086:
6087: =item *
6088:
6089: dump($namespace,$udom,$uname,$regexp) :
6090: dumps the complete (or key matching regexp) namespace into a hash
6091: ($udom, $uname and $regexp are optional)
6092:
6093: =item *
6094:
6095: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
6096: $store can be a scalar, an array reference, or if the amount to be
6097: incremented is > 1, a hash reference.
6098:
6099: ($udom and $uname are optional)
6100:
6101: =item *
6102:
6103: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
6104: ($udom and $uname are optional)
6105:
6106: =item *
6107:
6108: putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
6109: keys used in storehash include version information (e.g., 1:$symb:message etc.) as
6110: used in records written by &store and retrieved by &restore. This function
6111: was created for use in editing discussion posts, without incrementing the
6112: version number included in the key for a particular post. The colon
6113: separated list of attribute names (e.g., the value associated with the key
6114: 1:keys:$symb) is also generated and passed in the ampersand separated
6115: items sent to lonnet::reply().
6116:
6117: =item *
6118:
6119: cput($namespace,$storehash,$udom,$uname) : critical put
6120: ($udom and $uname are optional)
6121:
6122: =item *
6123:
6124: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6125: reference filled in from namesp (encrypts the return communication)
6126: ($udom and $uname are optional)
6127:
6128: =item *
6129:
6130: log($udom,$name,$home,$message) : write to permanent log for user; use
6131: critical subroutine
6132:
6133: =back
6134:
6135: =head2 Network Status Functions
6136:
6137: =over 4
6138:
6139: =item *
6140:
6141: dirlist($uri) : return directory list based on URI
6142:
6143: =item *
6144:
6145: spareserver() : find server with least workload from spare.tab
6146:
6147: =back
6148:
6149: =head2 Apache Request
6150:
6151: =over 4
6152:
6153: =item *
6154:
6155: ssi($url,%hash) : server side include, does a complete request cycle on url to
6156: localhost, posts hash
6157:
6158: =back
6159:
6160: =head2 Data to String to Data
6161:
6162: =over 4
6163:
6164: =item *
6165:
6166: hash2str(%hash) : convert a hash into a string complete with escaping and '='
6167: and '&' separators, supports elements that are arrayrefs and hashrefs
6168:
6169: =item *
6170:
6171: hashref2str($hashref) : convert a hashref into a string complete with
6172: escaping and '=' and '&' separators, supports elements that are
6173: arrayrefs and hashrefs
6174:
6175: =item *
6176:
6177: arrayref2str($arrayref) : convert an arrayref into a string complete
6178: with escaping and '&' separators, supports elements that are arrayrefs
6179: and hashrefs
6180:
6181: =item *
6182:
6183: str2hash($string) : convert string to hash using unescaping and
6184: splitting on '=' and '&', supports elements that are arrayrefs and
6185: hashrefs
6186:
6187: =item *
6188:
6189: str2array($string) : convert string to hash using unescaping and
6190: splitting on '&', supports elements that are arrayrefs and hashrefs
6191:
6192: =back
6193:
6194: =head2 Logging Routines
6195:
6196: =over 4
6197:
6198: These routines allow one to make log messages in the lonnet.log and
6199: lonnet.perm logfiles.
6200:
6201: =item *
6202:
6203: logtouch() : make sure the logfile, lonnet.log, exists
6204:
6205: =item *
6206:
6207: logthis() : append message to the normal lonnet.log file, it gets
6208: preiodically rolled over and deleted.
6209:
6210: =item *
6211:
6212: logperm() : append a permanent message to lonnet.perm.log, this log
6213: file never gets deleted by any automated portion of the system, only
6214: messages of critical importance should go in here.
6215:
6216: =back
6217:
6218: =head2 General File Helper Routines
6219:
6220: =over 4
6221:
6222: =item *
6223:
6224: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
6225: (a) files in /uploaded
6226: (i) If a local copy of the file exists -
6227: compares modification date of local copy with last-modified date for
6228: definitive version stored on home server for course. If local copy is
6229: stale, requests a new version from the home server and stores it.
6230: If the original has been removed from the home server, then local copy
6231: is unlinked.
6232: (ii) If local copy does not exist -
6233: requests the file from the home server and stores it.
6234:
6235: If $caller is 'uploadrep':
6236: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
6237: for request for files originally uploaded via DOCS.
6238: - returns 'ok' if fresh local copy now available, -1 otherwise.
6239:
6240: Otherwise:
6241: This indicates a call from the content generation phase of the request.
6242: - returns the entire contents of the file or -1.
6243:
6244: (b) files in /res
6245: - returns the entire contents of a file or -1;
6246: it properly subscribes to and replicates the file if neccessary.
6247:
6248: =item *
6249:
6250: filelocation($dir,$file) : returns file system location of a file
6251: based on URI; meant to be "fairly clean" absolute reference, $dir is a
6252: directory that relative $file lookups are to looked in ($dir of /a/dir
6253: and a file of ../bob will become /a/bob)
6254:
6255: =item *
6256:
6257: hreflocation($dir,$file) : returns file system location or a URL; same as
6258: filelocation except for hrefs
6259:
6260: =item *
6261:
6262: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
6263:
6264: =back
6265:
6266: =head2 HTTP Helper Routines
6267:
6268: =over 4
6269:
6270: =item *
6271:
6272: escape() : unpack non-word characters into CGI-compatible hex codes
6273:
6274: =item *
6275:
6276: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
6277:
6278: =back
6279:
6280: =head1 PRIVATE SUBROUTINES
6281:
6282: =head2 Underlying communication routines (Shouldn't call)
6283:
6284: =over 4
6285:
6286: =item *
6287:
6288: subreply() : tries to pass a message to lonc, returns con_lost if incapable
6289:
6290: =item *
6291:
6292: reply() : uses subreply to send a message to remote machine, logs all failures
6293:
6294: =item *
6295:
6296: critical() : passes a critical message to another server; if cannot
6297: get through then place message in connection buffer directory and
6298: returns con_delayed, if incapable of saving message, returns
6299: con_failed
6300:
6301: =item *
6302:
6303: reconlonc() : tries to reconnect lonc client processes.
6304:
6305: =back
6306:
6307: =head2 Resource Access Logging
6308:
6309: =over 4
6310:
6311: =item *
6312:
6313: flushcourselogs() : flush (save) buffer logs and access logs
6314:
6315: =item *
6316:
6317: courselog($what) : save message for course in hash
6318:
6319: =item *
6320:
6321: courseacclog($what) : save message for course using &courselog(). Perform
6322: special processing for specific resource types (problems, exams, quizzes, etc).
6323:
6324: =item *
6325:
6326: goodbye() : flush course logs and log shutting down; it is called in srm.conf
6327: as a PerlChildExitHandler
6328:
6329: =back
6330:
6331: =head2 Other
6332:
6333: =over 4
6334:
6335: =item *
6336:
6337: symblist($mapname,%newhash) : update symbolic storage links
6338:
6339: =back
6340:
6341: =cut
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