1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.482 2004/04/01 14:55:18 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonnet;
31:
32: use strict;
33: use LWP::UserAgent();
34: use HTTP::Headers;
35: use Date::Parse;
36: use vars
37: qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom
38: %libserv %pr %prp %metacache %packagetab %titlecache %courseresversioncache %resversioncache
39: %courselogs %accesshash %userrolehash $processmarker $dumpcount
40: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseresdatacache
41: %userresdatacache %usectioncache %domaindescription %domain_auth_def %domain_auth_arg_def
42: %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir);
43:
44: use IO::Socket;
45: use GDBM_File;
46: use Apache::Constants qw(:common :http);
47: use HTML::LCParser;
48: use Fcntl qw(:flock);
49: use Apache::loncoursedata;
50: use Apache::lonlocal;
51: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw);
52: use Time::HiRes();
53: my $readit;
54:
55: =pod
56:
57: =head1 Package Variables
58:
59: These are largely undocumented, so if you decipher one please note it here.
60:
61: =over 4
62:
63: =item $processmarker
64:
65: Contains the time this process was started and this servers host id.
66:
67: =item $dumpcount
68:
69: Counts the number of times a message log flush has been attempted (regardless
70: of success) by this process. Used as part of the filename when messages are
71: delayed.
72:
73: =back
74:
75: =cut
76:
77:
78: # --------------------------------------------------------------------- Logging
79:
80: sub logtouch {
81: my $execdir=$perlvar{'lonDaemons'};
82: unless (-e "$execdir/logs/lonnet.log") {
83: open(my $fh,">>$execdir/logs/lonnet.log");
84: close $fh;
85: }
86: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
87: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
88: }
89:
90: sub logthis {
91: my $message=shift;
92: my $execdir=$perlvar{'lonDaemons'};
93: my $now=time;
94: my $local=localtime($now);
95: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
96: print $fh "$local ($$): $message\n";
97: close($fh);
98: }
99: return 1;
100: }
101:
102: sub logperm {
103: my $message=shift;
104: my $execdir=$perlvar{'lonDaemons'};
105: my $now=time;
106: my $local=localtime($now);
107: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
108: print $fh "$now:$message:$local\n";
109: close($fh);
110: }
111: return 1;
112: }
113:
114: # -------------------------------------------------- Non-critical communication
115: sub subreply {
116: my ($cmd,$server)=@_;
117: my $peerfile="$perlvar{'lonSockDir'}/$server";
118: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
119: Type => SOCK_STREAM,
120: Timeout => 10)
121: or return "con_lost";
122: print $client "$cmd\n";
123: my $answer=<$client>;
124: if (!$answer) { $answer="con_lost"; }
125: chomp($answer);
126: return $answer;
127: }
128:
129: sub reply {
130: my ($cmd,$server)=@_;
131: unless (defined($hostname{$server})) { return 'no_such_host'; }
132: my $answer=subreply($cmd,$server);
133: if ($answer eq 'con_lost') {
134: #sleep 5;
135: #$answer=subreply($cmd,$server);
136: #if ($answer eq 'con_lost') {
137: # &logthis("Second attempt con_lost on $server");
138: # my $peerfile="$perlvar{'lonSockDir'}/$server";
139: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
140: # Type => SOCK_STREAM,
141: # Timeout => 10)
142: # or return "con_lost";
143: # &logthis("Killing socket");
144: # print $client "close_connection_exit\n";
145: #sleep 5;
146: # $answer=subreply($cmd,$server);
147: #}
148: }
149: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
150: &logthis("<font color=blue>WARNING:".
151: " $cmd to $server returned $answer</font>");
152: }
153: return $answer;
154: }
155:
156: # ----------------------------------------------------------- Send USR1 to lonc
157:
158: sub reconlonc {
159: my $peerfile=shift;
160: &logthis("Trying to reconnect for $peerfile");
161: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
162: if (open(my $fh,"<$loncfile")) {
163: my $loncpid=<$fh>;
164: chomp($loncpid);
165: if (kill 0 => $loncpid) {
166: &logthis("lonc at pid $loncpid responding, sending USR1");
167: kill USR1 => $loncpid;
168: sleep 1;
169: if (-e "$peerfile") { return; }
170: &logthis("$peerfile still not there, give it another try");
171: sleep 5;
172: if (-e "$peerfile") { return; }
173: &logthis(
174: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
175: } else {
176: &logthis(
177: "<font color=blue>WARNING:".
178: " lonc at pid $loncpid not responding, giving up</font>");
179: }
180: } else {
181: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
182: }
183: }
184:
185: # ------------------------------------------------------ Critical communication
186:
187: sub critical {
188: my ($cmd,$server)=@_;
189: unless ($hostname{$server}) {
190: &logthis("<font color=blue>WARNING:".
191: " Critical message to unknown server ($server)</font>");
192: return 'no_such_host';
193: }
194: my $answer=reply($cmd,$server);
195: if ($answer eq 'con_lost') {
196: my $pingreply=reply('ping',$server);
197: &reconlonc("$perlvar{'lonSockDir'}/$server");
198: my $pongreply=reply('pong',$server);
199: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
200: $answer=reply($cmd,$server);
201: if ($answer eq 'con_lost') {
202: my $now=time;
203: my $middlename=$cmd;
204: $middlename=substr($middlename,0,16);
205: $middlename=~s/\W//g;
206: my $dfilename=
207: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
208: $dumpcount++;
209: {
210: my $dfh;
211: if (open($dfh,">$dfilename")) {
212: print $dfh "$cmd\n";
213: close($dfh);
214: }
215: }
216: sleep 2;
217: my $wcmd='';
218: {
219: my $dfh;
220: if (open($dfh,"<$dfilename")) {
221: $wcmd=<$dfh>;
222: close($dfh);
223: }
224: }
225: chomp($wcmd);
226: if ($wcmd eq $cmd) {
227: &logthis("<font color=blue>WARNING: ".
228: "Connection buffer $dfilename: $cmd</font>");
229: &logperm("D:$server:$cmd");
230: return 'con_delayed';
231: } else {
232: &logthis("<font color=red>CRITICAL:"
233: ." Critical connection failed: $server $cmd</font>");
234: &logperm("F:$server:$cmd");
235: return 'con_failed';
236: }
237: }
238: }
239: return $answer;
240: }
241:
242: #
243: # -------------- Remove all key from the env that start witha lowercase letter
244: # (Which is always a lon-capa value)
245:
246: sub cleanenv {
247: # unless (defined(&Apache::exists_config_define("MODPERL2"))) { return; }
248: # unless (&Apache::exists_config_define("MODPERL2")) { return; }
249: foreach my $key (keys(%ENV)) {
250: if ($key =~ /^[a-z]/) {
251: delete($ENV{$key});
252: }
253: }
254: }
255:
256: # ------------------------------------------- Transfer profile into environment
257:
258: sub transfer_profile_to_env {
259: my ($lonidsdir,$handle)=@_;
260: my @profile;
261: {
262: open(my $idf,"$lonidsdir/$handle.id");
263: flock($idf,LOCK_SH);
264: @profile=<$idf>;
265: close($idf);
266: }
267: my $envi;
268: my %Remove;
269: for ($envi=0;$envi<=$#profile;$envi++) {
270: chomp($profile[$envi]);
271: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
272: $ENV{$envname} = $envvalue;
273: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
274: if ($time < time-300) {
275: $Remove{$key}++;
276: }
277: }
278: }
279: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
280: foreach my $expired_key (keys(%Remove)) {
281: &delenv($expired_key);
282: }
283: }
284:
285: # ---------------------------------------------------------- Append Environment
286:
287: sub appenv {
288: my %newenv=@_;
289: foreach (keys %newenv) {
290: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
291: &logthis("<font color=blue>WARNING: ".
292: "Attempt to modify environment ".$_." to ".$newenv{$_}
293: .'</font>');
294: delete($newenv{$_});
295: } else {
296: $ENV{$_}=$newenv{$_};
297: }
298: }
299:
300: my $lockfh;
301: unless (open($lockfh,"$ENV{'user.environment'}")) {
302: return 'error: '.$!;
303: }
304: unless (flock($lockfh,LOCK_EX)) {
305: &logthis("<font color=blue>WARNING: ".
306: 'Could not obtain exclusive lock in appenv: '.$!);
307: close($lockfh);
308: return 'error: '.$!;
309: }
310:
311: my @oldenv;
312: {
313: my $fh;
314: unless (open($fh,"$ENV{'user.environment'}")) {
315: return 'error: '.$!;
316: }
317: @oldenv=<$fh>;
318: close($fh);
319: }
320: for (my $i=0; $i<=$#oldenv; $i++) {
321: chomp($oldenv[$i]);
322: if ($oldenv[$i] ne '') {
323: my ($name,$value)=split(/=/,$oldenv[$i]);
324: unless (defined($newenv{$name})) {
325: $newenv{$name}=$value;
326: }
327: }
328: }
329: {
330: my $fh;
331: unless (open($fh,">$ENV{'user.environment'}")) {
332: return 'error';
333: }
334: my $newname;
335: foreach $newname (keys %newenv) {
336: print $fh "$newname=$newenv{$newname}\n";
337: }
338: close($fh);
339: }
340:
341: close($lockfh);
342: return 'ok';
343: }
344: # ----------------------------------------------------- Delete from Environment
345:
346: sub delenv {
347: my $delthis=shift;
348: my %newenv=();
349: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
350: &logthis("<font color=blue>WARNING: ".
351: "Attempt to delete from environment ".$delthis);
352: return 'error';
353: }
354: my @oldenv;
355: {
356: my $fh;
357: unless (open($fh,"$ENV{'user.environment'}")) {
358: return 'error';
359: }
360: unless (flock($fh,LOCK_SH)) {
361: &logthis("<font color=blue>WARNING: ".
362: 'Could not obtain shared lock in delenv: '.$!);
363: close($fh);
364: return 'error: '.$!;
365: }
366: @oldenv=<$fh>;
367: close($fh);
368: }
369: {
370: my $fh;
371: unless (open($fh,">$ENV{'user.environment'}")) {
372: return 'error';
373: }
374: unless (flock($fh,LOCK_EX)) {
375: &logthis("<font color=blue>WARNING: ".
376: 'Could not obtain exclusive lock in delenv: '.$!);
377: close($fh);
378: return 'error: '.$!;
379: }
380: foreach (@oldenv) {
381: if ($_=~/^$delthis/) {
382: my ($key,undef) = split('=',$_);
383: delete($ENV{$key});
384: } else {
385: print $fh $_;
386: }
387: }
388: close($fh);
389: }
390: return 'ok';
391: }
392:
393: # ------------------------------------------ Find out current server userload
394: # there is a copy in lond
395: sub userload {
396: my $numusers=0;
397: {
398: opendir(LONIDS,$perlvar{'lonIDsDir'});
399: my $filename;
400: my $curtime=time;
401: while ($filename=readdir(LONIDS)) {
402: if ($filename eq '.' || $filename eq '..') {next;}
403: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
404: if ($curtime-$mtime < 1800) { $numusers++; }
405: }
406: closedir(LONIDS);
407: }
408: my $userloadpercent=0;
409: my $maxuserload=$perlvar{'lonUserLoadLim'};
410: if ($maxuserload) {
411: $userloadpercent=100*$numusers/$maxuserload;
412: }
413: $userloadpercent=sprintf("%.2f",$userloadpercent);
414: return $userloadpercent;
415: }
416:
417: # ------------------------------------------ Fight off request when overloaded
418:
419: sub overloaderror {
420: my ($r,$checkserver)=@_;
421: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
422: my $loadavg;
423: if ($checkserver eq $perlvar{'lonHostID'}) {
424: open(my $loadfile,'/proc/loadavg');
425: $loadavg=<$loadfile>;
426: $loadavg =~ s/\s.*//g;
427: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
428: close($loadfile);
429: } else {
430: $loadavg=&reply('load',$checkserver);
431: }
432: my $overload=$loadavg-100;
433: if ($overload>0) {
434: $r->err_headers_out->{'Retry-After'}=$overload;
435: $r->log_error('Overload of '.$overload.' on '.$checkserver);
436: return 413;
437: }
438: return '';
439: }
440:
441: # ------------------------------ Find server with least workload from spare.tab
442:
443: sub spareserver {
444: my ($loadpercent,$userloadpercent) = @_;
445: my $tryserver;
446: my $spareserver='';
447: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
448: my $lowestserver=$loadpercent > $userloadpercent?
449: $loadpercent : $userloadpercent;
450: foreach $tryserver (keys %spareid) {
451: my $loadans=reply('load',$tryserver);
452: my $userloadans=reply('userload',$tryserver);
453: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
454: next; #didn't get a number from the server
455: }
456: my $answer;
457: if ($loadans =~ /\d/) {
458: if ($userloadans =~ /\d/) {
459: #both are numbers, pick the bigger one
460: $answer=$loadans > $userloadans?
461: $loadans : $userloadans;
462: } else {
463: $answer = $loadans;
464: }
465: } else {
466: $answer = $userloadans;
467: }
468: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
469: $spareserver="http://$hostname{$tryserver}";
470: $lowestserver=$answer;
471: }
472: }
473: return $spareserver;
474: }
475:
476: # --------------------------------------------- Try to change a user's password
477:
478: sub changepass {
479: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
480: $currentpass = &escape($currentpass);
481: $newpass = &escape($newpass);
482: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
483: $server);
484: if (! $answer) {
485: &logthis("No reply on password change request to $server ".
486: "by $uname in domain $udom.");
487: } elsif ($answer =~ "^ok") {
488: &logthis("$uname in $udom successfully changed their password ".
489: "on $server.");
490: } elsif ($answer =~ "^pwchange_failure") {
491: &logthis("$uname in $udom was unable to change their password ".
492: "on $server. The action was blocked by either lcpasswd ".
493: "or pwchange");
494: } elsif ($answer =~ "^non_authorized") {
495: &logthis("$uname in $udom did not get their password correct when ".
496: "attempting to change it on $server.");
497: } elsif ($answer =~ "^auth_mode_error") {
498: &logthis("$uname in $udom attempted to change their password despite ".
499: "not being locally or internally authenticated on $server.");
500: } elsif ($answer =~ "^unknown_user") {
501: &logthis("$uname in $udom attempted to change their password ".
502: "on $server but were unable to because $server is not ".
503: "their home server.");
504: } elsif ($answer =~ "^refused") {
505: &logthis("$server refused to change $uname in $udom password because ".
506: "it was sent an unencrypted request to change the password.");
507: }
508: return $answer;
509: }
510:
511: # ----------------------- Try to determine user's current authentication scheme
512:
513: sub queryauthenticate {
514: my ($uname,$udom)=@_;
515: my $uhome=&homeserver($uname,$udom);
516: if (!$uhome) {
517: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
518: return 'no_host';
519: }
520: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
521: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
522: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
523: }
524: return $answer;
525: }
526:
527: # --------- Try to authenticate user from domain's lib servers (first this one)
528:
529: sub authenticate {
530: my ($uname,$upass,$udom)=@_;
531: $upass=escape($upass);
532: $uname=~s/\W//g;
533: my $uhome=&homeserver($uname,$udom);
534: if (!$uhome) {
535: &logthis("User $uname at $udom is unknown in authenticate");
536: return 'no_host';
537: }
538: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
539: if ($answer eq 'authorized') {
540: &logthis("User $uname at $udom authorized by $uhome");
541: return $uhome;
542: }
543: if ($answer eq 'non_authorized') {
544: &logthis("User $uname at $udom rejected by $uhome");
545: return 'no_host';
546: }
547: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
548: return 'no_host';
549: }
550:
551: # ---------------------- Find the homebase for a user from domain's lib servers
552:
553: sub homeserver {
554: my ($uname,$udom,$ignoreBadCache)=@_;
555: my $index="$uname:$udom";
556:
557: my ($result,$cached)=&is_cached(\%homecache,$index,'home',86400);
558: if (defined($cached)) { return $result; }
559: my $tryserver;
560: foreach $tryserver (keys %libserv) {
561: next if ($ignoreBadCache ne 'true' &&
562: exists($badServerCache{$tryserver}));
563: if ($hostdom{$tryserver} eq $udom) {
564: my $answer=reply("home:$udom:$uname",$tryserver);
565: if ($answer eq 'found') {
566: return &do_cache(\%homecache,$index,$tryserver,'home');
567: } elsif ($answer eq 'no_host') {
568: $badServerCache{$tryserver}=1;
569: }
570: }
571: }
572: return 'no_host';
573: }
574:
575: # ------------------------------------- Find the usernames behind a list of IDs
576:
577: sub idget {
578: my ($udom,@ids)=@_;
579: my %returnhash=();
580:
581: my $tryserver;
582: foreach $tryserver (keys %libserv) {
583: if ($hostdom{$tryserver} eq $udom) {
584: my $idlist=join('&',@ids);
585: $idlist=~tr/A-Z/a-z/;
586: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
587: my @answer=();
588: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
589: @answer=split(/\&/,$reply);
590: } ;
591: my $i;
592: for ($i=0;$i<=$#ids;$i++) {
593: if ($answer[$i]) {
594: $returnhash{$ids[$i]}=$answer[$i];
595: }
596: }
597: }
598: }
599: return %returnhash;
600: }
601:
602: # ------------------------------------- Find the IDs behind a list of usernames
603:
604: sub idrget {
605: my ($udom,@unames)=@_;
606: my %returnhash=();
607: foreach (@unames) {
608: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
609: }
610: return %returnhash;
611: }
612:
613: # ------------------------------- Store away a list of names and associated IDs
614:
615: sub idput {
616: my ($udom,%ids)=@_;
617: my %servers=();
618: foreach (keys %ids) {
619: my $uhom=&homeserver($_,$udom);
620: if ($uhom ne 'no_host') {
621: my $id=&escape($ids{$_});
622: $id=~tr/A-Z/a-z/;
623: my $unam=&escape($_);
624: if ($servers{$uhom}) {
625: $servers{$uhom}.='&'.$id.'='.$unam;
626: } else {
627: $servers{$uhom}=$id.'='.$unam;
628: }
629: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
630: }
631: }
632: foreach (keys %servers) {
633: &critical('idput:'.$udom.':'.$servers{$_},$_);
634: }
635: }
636:
637: # --------------------------------------------------- Assign a key to a student
638:
639: sub assign_access_key {
640: #
641: # a valid key looks like uname:udom#comments
642: # comments are being appended
643: #
644: my ($ckey,$cdom,$cnum,$udom,$uname,$logentry)=@_;
645: $cdom=
646: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
647: $cnum=
648: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
649: $udom=$ENV{'user.name'} unless (defined($udom));
650: $uname=$ENV{'user.domain'} unless (defined($uname));
651: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
652: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
653: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
654: # assigned to this person
655: # - this should not happen,
656: # unless something went wrong
657: # the first time around
658: # ready to assign
659: $logentry=$1.'; '.$logentry;
660: if (&put('accesskey',{$ckey=>$uname.':'.$udom.'#'.$logentry},
661: $cdom,$cnum) eq 'ok') {
662: # key now belongs to user
663: my $envkey='key.'.$cdom.'_'.$cnum;
664: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
665: &appenv('environment.'.$envkey => $ckey);
666: return 'ok';
667: } else {
668: return
669: 'error: Count not permanently assign key, will need to be re-entered later.';
670: }
671: } else {
672: return 'error: Could not assign key, try again later.';
673: }
674: } elsif (!$existing{$ckey}) {
675: # the key does not exist
676: return 'error: The key does not exist';
677: } else {
678: # the key is somebody else's
679: return 'error: The key is already in use';
680: }
681: }
682:
683: # ------------------------------------------ put an additional comment on a key
684:
685: sub comment_access_key {
686: #
687: # a valid key looks like uname:udom#comments
688: # comments are being appended
689: #
690: my ($ckey,$cdom,$cnum,$logentry)=@_;
691: $cdom=
692: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
693: $cnum=
694: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
695: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
696: if ($existing{$ckey}) {
697: $existing{$ckey}.='; '.$logentry;
698: # ready to assign
699: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
700: $cdom,$cnum) eq 'ok') {
701: return 'ok';
702: } else {
703: return 'error: Count not store comment.';
704: }
705: } else {
706: # the key does not exist
707: return 'error: The key does not exist';
708: }
709: }
710:
711: # ------------------------------------------------------ Generate a set of keys
712:
713: sub generate_access_keys {
714: my ($number,$cdom,$cnum,$logentry)=@_;
715: $cdom=
716: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
717: $cnum=
718: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
719: unless (&allowed('mky',$cdom)) { return 0; }
720: unless (($cdom) && ($cnum)) { return 0; }
721: if ($number>10000) { return 0; }
722: sleep(2); # make sure don't get same seed twice
723: srand(time()^($$+($$<<15))); # from "Programming Perl"
724: my $total=0;
725: for (my $i=1;$i<=$number;$i++) {
726: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
727: sprintf("%lx",int(100000*rand)).'-'.
728: sprintf("%lx",int(100000*rand));
729: $newkey=~s/1/g/g; # folks mix up 1 and l
730: $newkey=~s/0/h/g; # and also 0 and O
731: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
732: if ($existing{$newkey}) {
733: $i--;
734: } else {
735: if (&put('accesskeys',
736: { $newkey => '# generated '.localtime().
737: ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
738: '; '.$logentry },
739: $cdom,$cnum) eq 'ok') {
740: $total++;
741: }
742: }
743: }
744: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
745: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
746: return $total;
747: }
748:
749: # ------------------------------------------------------- Validate an accesskey
750:
751: sub validate_access_key {
752: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
753: $cdom=
754: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
755: $cnum=
756: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
757: $udom=$ENV{'user.name'} unless (defined($udom));
758: $uname=$ENV{'user.domain'} unless (defined($uname));
759: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
760: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
761: }
762:
763: # ------------------------------------- Find the section of student in a course
764:
765: sub getsection {
766: my ($udom,$unam,$courseid)=@_;
767: $courseid=~s/\_/\//g;
768: $courseid=~s/^(\w)/\/$1/;
769: my %Pending;
770: my %Expired;
771: #
772: # Each role can either have not started yet (pending), be active,
773: # or have expired.
774: #
775: # If there is an active role, we are done.
776: #
777: # If there is more than one role which has not started yet,
778: # choose the one which will start sooner
779: # If there is one role which has not started yet, return it.
780: #
781: # If there is more than one expired role, choose the one which ended last.
782: # If there is a role which has expired, return it.
783: #
784: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
785: &homeserver($unam,$udom)))) {
786: my ($key,$value)=split(/\=/,$_);
787: $key=&unescape($key);
788: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
789: my $section=$1;
790: if ($key eq $courseid.'_st') { $section=''; }
791: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
792: my $now=time;
793: if (defined($end) && ($now > $end)) {
794: $Expired{$end}=$section;
795: next;
796: }
797: if (defined($start) && ($now < $start)) {
798: $Pending{$start}=$section;
799: next;
800: }
801: return $section;
802: }
803: #
804: # Presumedly there will be few matching roles from the above
805: # loop and the sorting time will be negligible.
806: if (scalar(keys(%Pending))) {
807: my ($time) = sort {$a <=> $b} keys(%Pending);
808: return $Pending{$time};
809: }
810: if (scalar(keys(%Expired))) {
811: my @sorted = sort {$a <=> $b} keys(%Expired);
812: my $time = pop(@sorted);
813: return $Expired{$time};
814: }
815: return '-1';
816: }
817:
818:
819: my $disk_caching_disabled=1;
820:
821: sub devalidate_cache {
822: my ($cache,$id,$name) = @_;
823: delete $$cache{$id.'.time'};
824: delete $$cache{$id};
825: if ($disk_caching_disabled) { return; }
826: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
827: open(DB,"$filename.lock");
828: flock(DB,LOCK_EX);
829: my %hash;
830: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
831: eval <<'EVALBLOCK';
832: delete($hash{$id});
833: delete($hash{$id.'.time'});
834: EVALBLOCK
835: if ($@) {
836: &logthis("<font color='red'>devalidate_cache blew up :$@:$name</font>");
837: unlink($filename);
838: }
839: } else {
840: if (-e $filename) {
841: &logthis("Unable to tie hash (devalidate cache): $name");
842: unlink($filename);
843: }
844: }
845: untie(%hash);
846: flock(DB,LOCK_UN);
847: close(DB);
848: }
849:
850: sub is_cached {
851: my ($cache,$id,$name,$time) = @_;
852: if (!$time) { $time=300; }
853: if (!exists($$cache{$id.'.time'})) {
854: &load_cache_item($cache,$name,$id);
855: }
856: if (!exists($$cache{$id.'.time'})) {
857: # &logthis("Didn't find $id");
858: return (undef,undef);
859: } else {
860: if (time-($$cache{$id.'.time'})>$time) {
861: # &logthis("Devalidating $id - ".time-($$cache{$id.'.time'}));
862: &devalidate_cache($cache,$id,$name);
863: return (undef,undef);
864: }
865: }
866: return ($$cache{$id},1);
867: }
868:
869: sub do_cache {
870: my ($cache,$id,$value,$name) = @_;
871: $$cache{$id.'.time'}=time;
872: $$cache{$id}=$value;
873: # &logthis("Caching $id as :$value:");
874: &save_cache_item($cache,$name,$id);
875: # do_cache implictly return the set value
876: $$cache{$id};
877: }
878:
879: sub save_cache_item {
880: my ($cache,$name,$id)=@_;
881: if ($disk_caching_disabled) { return; }
882: my $starttime=&Time::HiRes::time();
883: # &logthis("Saving :$name:$id");
884: my %hash;
885: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
886: open(DB,"$filename.lock");
887: flock(DB,LOCK_EX);
888: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
889: eval <<'EVALBLOCK';
890: $hash{$id.'.time'}=$$cache{$id.'.time'};
891: $hash{$id}=freeze({'item'=>$$cache{$id}});
892: EVALBLOCK
893: if ($@) {
894: &logthis("<font color='red'>save_cache blew up :$@:$name</font>");
895: unlink($filename);
896: }
897: } else {
898: if (-e $filename) {
899: &logthis("Unable to tie hash (save cache item): $name ($!)");
900: unlink($filename);
901: }
902: }
903: untie(%hash);
904: flock(DB,LOCK_UN);
905: close(DB);
906: # &logthis("save_cache_item $name took ".(&Time::HiRes::time()-$starttime));
907: }
908:
909: sub load_cache_item {
910: my ($cache,$name,$id)=@_;
911: if ($disk_caching_disabled) { return; }
912: my $starttime=&Time::HiRes::time();
913: # &logthis("Before Loading $name for $id size is ".scalar(%$cache));
914: my %hash;
915: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
916: open(DB,"$filename.lock");
917: flock(DB,LOCK_SH);
918: if (tie(%hash,'GDBM_File',$filename,&GDBM_READER(),0640)) {
919: eval <<'EVALBLOCK';
920: if (!%$cache) {
921: my $count;
922: while (my ($key,$value)=each(%hash)) {
923: $count++;
924: if ($key =~ /\.time$/) {
925: $$cache{$key}=$value;
926: } else {
927: my $hashref=thaw($value);
928: $$cache{$key}=$hashref->{'item'};
929: }
930: }
931: # &logthis("Initial load: $count");
932: } else {
933: my $hashref=thaw($hash{$id});
934: $$cache{$id}=$hashref->{'item'};
935: $$cache{$id.'.time'}=$hash{$id.'.time'};
936: }
937: EVALBLOCK
938: if ($@) {
939: &logthis("<font color='red'>load_cache blew up :$@:$name</font>");
940: unlink($filename);
941: }
942: } else {
943: if (-e $filename) {
944: &logthis("Unable to tie hash (load cache item): $name ($!)");
945: unlink($filename);
946: }
947: }
948: untie(%hash);
949: flock(DB,LOCK_UN);
950: close(DB);
951: # &logthis("After Loading $name size is ".scalar(%$cache));
952: # &logthis("load_cache_item $name took ".(&Time::HiRes::time()-$starttime));
953: }
954:
955: sub usection {
956: my ($udom,$unam,$courseid)=@_;
957: my $hashid="$udom:$unam:$courseid";
958:
959: my ($result,$cached)=&is_cached(\%usectioncache,$hashid,'usection');
960: if (defined($cached)) { return $result; }
961: $courseid=~s/\_/\//g;
962: $courseid=~s/^(\w)/\/$1/;
963: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
964: &homeserver($unam,$udom)))) {
965: my ($key,$value)=split(/\=/,$_);
966: $key=&unescape($key);
967: if ($key=~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/) {
968: my $section=$1;
969: if ($key eq $courseid.'_st') { $section=''; }
970: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
971: my $now=time;
972: my $notactive=0;
973: if ($start) {
974: if ($now<$start) { $notactive=1; }
975: }
976: if ($end) {
977: if ($now>$end) { $notactive=1; }
978: }
979: unless ($notactive) {
980: return &do_cache(\%usectioncache,$hashid,$section,'usection');
981: }
982: }
983: }
984: return &do_cache(\%usectioncache,$hashid,'-1','usection');
985: }
986:
987: # ------------------------------------- Read an entry from a user's environment
988:
989: sub userenvironment {
990: my ($udom,$unam,@what)=@_;
991: my %returnhash=();
992: my @answer=split(/\&/,
993: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
994: &homeserver($unam,$udom)));
995: my $i;
996: for ($i=0;$i<=$#what;$i++) {
997: $returnhash{$what[$i]}=&unescape($answer[$i]);
998: }
999: return %returnhash;
1000: }
1001:
1002: # -------------------------------------------------------------------- New chat
1003:
1004: sub chatsend {
1005: my ($newentry,$anon)=@_;
1006: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1007: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1008: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1009: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1010: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
1011: &escape($newentry)),$chome);
1012: }
1013:
1014: # ------------------------------------------ Find current version of a resource
1015:
1016: sub getversion {
1017: my $fname=&clutter(shift);
1018: unless ($fname=~/^\/res\//) { return -1; }
1019: return ¤tversion(&filelocation('',$fname));
1020: }
1021:
1022: sub currentversion {
1023: my $fname=shift;
1024: my ($result,$cached)=&is_cached(\%resversioncache,$fname,'resversion',600);
1025: if (defined($cached)) { return $result; }
1026: my $author=$fname;
1027: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1028: my ($udom,$uname)=split(/\//,$author);
1029: my $home=homeserver($uname,$udom);
1030: if ($home eq 'no_host') {
1031: return -1;
1032: }
1033: my $answer=reply("currentversion:$fname",$home);
1034: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1035: return -1;
1036: }
1037: return &do_cache(\%resversioncache,$fname,$answer,'resversion');
1038: }
1039:
1040: # ----------------------------- Subscribe to a resource, return URL if possible
1041:
1042: sub subscribe {
1043: my $fname=shift;
1044: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1045: my $author=$fname;
1046: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1047: my ($udom,$uname)=split(/\//,$author);
1048: my $home=homeserver($uname,$udom);
1049: if ($home eq 'no_host') {
1050: return 'not_found';
1051: }
1052: my $answer=reply("sub:$fname",$home);
1053: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1054: $answer.=' by '.$home;
1055: }
1056: return $answer;
1057: }
1058:
1059: # -------------------------------------------------------------- Replicate file
1060:
1061: sub repcopy {
1062: my $filename=shift;
1063: $filename=~s/\/+/\//g;
1064: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
1065: my $transname="$filename.in.transfer";
1066: if ((-e $filename) || (-e $transname)) { return OK; }
1067: my $remoteurl=subscribe($filename);
1068: if ($remoteurl =~ /^con_lost by/) {
1069: &logthis("Subscribe returned $remoteurl: $filename");
1070: return HTTP_SERVICE_UNAVAILABLE;
1071: } elsif ($remoteurl eq 'not_found') {
1072: #&logthis("Subscribe returned not_found: $filename");
1073: return HTTP_NOT_FOUND;
1074: } elsif ($remoteurl =~ /^rejected by/) {
1075: &logthis("Subscribe returned $remoteurl: $filename");
1076: return FORBIDDEN;
1077: } elsif ($remoteurl eq 'directory') {
1078: return OK;
1079: } else {
1080: my $author=$filename;
1081: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1082: my ($udom,$uname)=split(/\//,$author);
1083: my $home=homeserver($uname,$udom);
1084: unless ($home eq $perlvar{'lonHostID'}) {
1085: my @parts=split(/\//,$filename);
1086: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1087: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1088: &logthis("Malconfiguration for replication: $filename");
1089: return HTTP_BAD_REQUEST;
1090: }
1091: my $count;
1092: for ($count=5;$count<$#parts;$count++) {
1093: $path.="/$parts[$count]";
1094: if ((-e $path)!=1) {
1095: mkdir($path,0777);
1096: }
1097: }
1098: my $ua=new LWP::UserAgent;
1099: my $request=new HTTP::Request('GET',"$remoteurl");
1100: my $response=$ua->request($request,$transname);
1101: if ($response->is_error()) {
1102: unlink($transname);
1103: my $message=$response->status_line;
1104: &logthis("<font color=blue>WARNING:"
1105: ." LWP get: $message: $filename</font>");
1106: return HTTP_SERVICE_UNAVAILABLE;
1107: } else {
1108: if ($remoteurl!~/\.meta$/) {
1109: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1110: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1111: if ($mresponse->is_error()) {
1112: unlink($filename.'.meta');
1113: &logthis(
1114: "<font color=yellow>INFO: No metadata: $filename</font>");
1115: }
1116: }
1117: rename($transname,$filename);
1118: return OK;
1119: }
1120: }
1121: }
1122: }
1123:
1124: # ------------------------------------------------ Get server side include body
1125: sub ssi_body {
1126: my ($filelink,%form)=@_;
1127: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1128: &ssi($filelink,%form));
1129: $output=~s/^.*?\<body[^\>]*\>//si;
1130: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1131: $output=~
1132: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
1133: return $output;
1134: }
1135:
1136: # --------------------------------------------------------- Server Side Include
1137:
1138: sub ssi {
1139:
1140: my ($fn,%form)=@_;
1141:
1142: my $ua=new LWP::UserAgent;
1143:
1144: my $request;
1145:
1146: if (%form) {
1147: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1148: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1149: } else {
1150: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1151: }
1152:
1153: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1154: my $response=$ua->request($request);
1155:
1156: return $response->content;
1157: }
1158:
1159: sub externalssi {
1160: my ($url)=@_;
1161: my $ua=new LWP::UserAgent;
1162: my $request=new HTTP::Request('GET',$url);
1163: my $response=$ua->request($request);
1164: return $response->content;
1165: }
1166:
1167: # ------- Add a token to a remote URI's query string to vouch for access rights
1168:
1169: sub tokenwrapper {
1170: my $uri=shift;
1171: $uri=~s/^http\:\/\/([^\/]+)//;
1172: $uri=~s/^\///;
1173: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
1174: my $token=$1;
1175: # if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
1176: if ($uri=~m|^uploaded/([^/]+)/([^/]+)/(.+)(\?\.*)*$|) {
1177: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
1178: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
1179: (($uri=~/\?/)?'&':'?').'token='.$token.
1180: '&tokenissued='.$perlvar{'lonHostID'};
1181: } else {
1182: return '/adm/notfound.html';
1183: }
1184: }
1185:
1186: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1187: # input: action, courseID, current domain, home server for course, intended
1188: # path to file, source of file.
1189: # output: ok if successful, diagnostic message otherwise
1190: #
1191: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1192: # course.
1193: #
1194: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1195: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1196: # course's home server.
1197: #
1198: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1199: # be copied from $source (current location) to
1200: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1201: # and will then be copied to
1202: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1203: # course's home server.
1204: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1205: # will be retrived from $ENV{form.$source} via DOCS interface to
1206: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1207: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1208: # in course's home server.
1209:
1210:
1211: sub process_coursefile {
1212: my ($action,$docuname,$docudom,$docuhome,$file,$source)=@_;
1213: my $fetchresult;
1214: if ($action eq 'propagate') {
1215: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file
1216: ,$docuhome);
1217: } else {
1218: my $fetchresult = '';
1219: my $fpath = '';
1220: my $fname = $file;
1221: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1222: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1223: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1224: unless ($fpath eq '') {
1225: my @parts=split('/',$fpath);
1226: foreach my $part (@parts) {
1227: $filepath.= '/'.$part;
1228: if ((-e $filepath)!=1) {
1229: mkdir($filepath,0777);
1230: }
1231: }
1232: }
1233: if ($action eq 'copy') {
1234: if ($source eq '') {
1235: $fetchresult = 'no source file';
1236: return $fetchresult;
1237: } else {
1238: my $destination = $filepath.'/'.$fname;
1239: rename($source,$destination);
1240: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1241: $docuhome);
1242: }
1243: } elsif ($action eq 'uploaddoc') {
1244: open(my $fh,'>'.$filepath.'/'.$fname);
1245: print $fh $ENV{'form.'.$source};
1246: close($fh);
1247: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1248: $docuhome);
1249: if ($fetchresult eq 'ok') {
1250: return '/uploaded/'.$fpath.'/'.$fname;
1251: } else {
1252: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1253: ' to host '.$docuhome.': '.$fetchresult);
1254: return '/adm/notfound.html';
1255: }
1256: }
1257: }
1258: unless ( ($fetchresult eq 'ok') || ($fetchresult eq 'no source file') ) {
1259: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1260: ' to host '.$docuhome.': '.$fetchresult);
1261: }
1262: return $fetchresult;
1263: }
1264:
1265: # --------------- Take an uploaded file and put it into the userfiles directory
1266: # input: name of form element, coursedoc=1 means this is for the course
1267: # output: url of file in userspace
1268:
1269: sub userfileupload {
1270: my ($formname,$coursedoc)=@_;
1271: my $fname=$ENV{'form.'.$formname.'.filename'};
1272: # Replace Windows backslashes by forward slashes
1273: $fname=~s/\\/\//g;
1274: # Get rid of everything but the actual filename
1275: $fname=~s/^.*\/([^\/]+)$/$1/;
1276: # Replace spaces by underscores
1277: $fname=~s/\s+/\_/g;
1278: # Replace all other weird characters by nothing
1279: $fname=~s/[^\w\.\-]//g;
1280: # See if there is anything left
1281: unless ($fname) { return 'error: no uploaded file'; }
1282: chop($ENV{'form.'.$formname});
1283: my $url = '';
1284: # Create the directory if not present
1285: my $docuname='';
1286: my $docudom='';
1287: my $docuhome='';
1288: if ($coursedoc) {
1289: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1290: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1291: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1292: if ($ENV{'form.folder'} =~ m/^default/) {
1293: $url = &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1294: } else {
1295: $fname=$ENV{'form.folder'}.'/'.$fname;
1296: $url = &process_coursefile('uploaddoc',$docuname,$docudom,$docuhome,$fname,$formname);
1297: }
1298: } else {
1299: $docuname=$ENV{'user.name'};
1300: $docudom=$ENV{'user.domain'};
1301: $docuhome=$ENV{'user.home'};
1302: }
1303: return
1304: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1305: }
1306:
1307: sub finishuserfileupload {
1308: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1309: my $path=$docudom.'/'.$docuname.'/';
1310: my $filepath=$perlvar{'lonDocRoot'};
1311: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1312: my $count;
1313: for ($count=4;$count<=$#parts;$count++) {
1314: $filepath.="/$parts[$count]";
1315: if ((-e $filepath)!=1) {
1316: mkdir($filepath,0777);
1317: }
1318: }
1319: # Save the file
1320: {
1321: open(my $fh,'>'.$filepath.'/'.$fname);
1322: print $fh $ENV{'form.'.$formname};
1323: close($fh);
1324: }
1325: # Notify homeserver to grep it
1326: #
1327: my $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,
1328: $docuhome);
1329: if ($fetchresult eq 'ok') {
1330: #
1331: # Return the URL to it
1332: return '/uploaded/'.$path.$fname;
1333: } else {
1334: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
1335: ' to host '.$docuhome.': '.$fetchresult);
1336: return '/adm/notfound.html';
1337: }
1338: }
1339:
1340: # ------------------------------------------------------------------------- Log
1341:
1342: sub log {
1343: my ($dom,$nam,$hom,$what)=@_;
1344: return critical("log:$dom:$nam:$what",$hom);
1345: }
1346:
1347: # ------------------------------------------------------------------ Course Log
1348: #
1349: # This routine flushes several buffers of non-mission-critical nature
1350: #
1351:
1352: sub flushcourselogs {
1353: &logthis('Flushing log buffers');
1354: #
1355: # course logs
1356: # This is a log of all transactions in a course, which can be used
1357: # for data mining purposes
1358: #
1359: # It also collects the courseid database, which lists last transaction
1360: # times and course titles for all courseids
1361: #
1362: my %courseidbuffer=();
1363: foreach (keys %courselogs) {
1364: my $crsid=$_;
1365: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1366: &escape($courselogs{$crsid}),
1367: $coursehombuf{$crsid}) eq 'ok') {
1368: delete $courselogs{$crsid};
1369: } else {
1370: &logthis('Failed to flush log buffer for '.$crsid);
1371: if (length($courselogs{$crsid})>40000) {
1372: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1373: " exceeded maximum size, deleting.</font>");
1374: delete $courselogs{$crsid};
1375: }
1376: }
1377: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1378: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1379: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1380: } else {
1381: $courseidbuffer{$coursehombuf{$crsid}}=
1382: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1383: }
1384: }
1385: #
1386: # Write course id database (reverse lookup) to homeserver of courses
1387: # Is used in pickcourse
1388: #
1389: foreach (keys %courseidbuffer) {
1390: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1391: }
1392: #
1393: # File accesses
1394: # Writes to the dynamic metadata of resources to get hit counts, etc.
1395: #
1396: foreach my $entry (keys(%accesshash)) {
1397: if ($entry =~ /___count$/) {
1398: my ($dom,$name);
1399: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1400: if (! defined($dom) || $dom eq '' ||
1401: ! defined($name) || $name eq '') {
1402: my $cid = $ENV{'request.course.id'};
1403: $dom = $ENV{'request.'.$cid.'.domain'};
1404: $name = $ENV{'request.'.$cid.'.num'};
1405: }
1406: my $value = $accesshash{$entry};
1407: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1408: my %temphash=($url => $value);
1409: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1410: if ($result eq 'ok') {
1411: delete $accesshash{$entry};
1412: } elsif ($result eq 'unknown_cmd') {
1413: # Target server has old code running on it.
1414: my %temphash=($entry => $value);
1415: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1416: delete $accesshash{$entry};
1417: }
1418: }
1419: } else {
1420: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1421: my %temphash=($entry => $accesshash{$entry});
1422: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1423: delete $accesshash{$entry};
1424: }
1425: }
1426: }
1427: #
1428: # Roles
1429: # Reverse lookup of user roles for course faculty/staff and co-authorship
1430: #
1431: foreach (keys %userrolehash) {
1432: my $entry=$_;
1433: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1434: split(/\:/,$entry);
1435: if (&Apache::lonnet::put('nohist_userroles',
1436: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1437: $rudom,$runame) eq 'ok') {
1438: delete $userrolehash{$entry};
1439: }
1440: }
1441: $dumpcount++;
1442: }
1443:
1444: sub courselog {
1445: my $what=shift;
1446: $what=time.':'.$what;
1447: unless ($ENV{'request.course.id'}) { return ''; }
1448: $coursedombuf{$ENV{'request.course.id'}}=
1449: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1450: $coursenumbuf{$ENV{'request.course.id'}}=
1451: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1452: $coursehombuf{$ENV{'request.course.id'}}=
1453: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1454: $coursedescrbuf{$ENV{'request.course.id'}}=
1455: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1456: if (defined $courselogs{$ENV{'request.course.id'}}) {
1457: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1458: } else {
1459: $courselogs{$ENV{'request.course.id'}}.=$what;
1460: }
1461: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1462: &flushcourselogs();
1463: }
1464: }
1465:
1466: sub courseacclog {
1467: my $fnsymb=shift;
1468: unless ($ENV{'request.course.id'}) { return ''; }
1469: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1470: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1471: $what.=':POST';
1472: foreach (keys %ENV) {
1473: if ($_=~/^form\.(.*)/) {
1474: $what.=':'.$1.'='.$ENV{$_};
1475: }
1476: }
1477: }
1478: &courselog($what);
1479: }
1480:
1481: sub countacc {
1482: my $url=&declutter(shift);
1483: return if (! defined($url) || $url eq '');
1484: unless ($ENV{'request.course.id'}) { return ''; }
1485: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1486: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1487: $accesshash{$key}++;
1488: }
1489:
1490: sub linklog {
1491: my ($from,$to)=@_;
1492: $from=&declutter($from);
1493: $to=&declutter($to);
1494: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1495: $accesshash{$to.'___'.$from.'___goto'}=1;
1496: }
1497:
1498: sub userrolelog {
1499: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1500: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1501: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1502: ($trole=~/^cr/) || ($trole=~/^ta/)) {
1503: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1504: $userrolehash
1505: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1506: =$tend.':'.$tstart;
1507: }
1508: }
1509:
1510: sub get_course_adv_roles {
1511: my $cid=shift;
1512: $cid=$ENV{'request.course.id'} unless (defined($cid));
1513: my %coursehash=&coursedescription($cid);
1514: my %nothide=();
1515: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1516: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1517: }
1518: my %returnhash=();
1519: my %dumphash=
1520: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1521: my $now=time;
1522: foreach (keys %dumphash) {
1523: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1524: if (($tstart) && ($tstart<0)) { next; }
1525: if (($tend) && ($tend<$now)) { next; }
1526: if (($tstart) && ($now<$tstart)) { next; }
1527: my ($role,$username,$domain,$section)=split(/\:/,$_);
1528: if ((&privileged($username,$domain)) &&
1529: (!$nothide{$username.':'.$domain})) { next; }
1530: my $key=&plaintext($role);
1531: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1532: if ($returnhash{$key}) {
1533: $returnhash{$key}.=','.$username.':'.$domain;
1534: } else {
1535: $returnhash{$key}=$username.':'.$domain;
1536: }
1537: }
1538: return %returnhash;
1539: }
1540:
1541: sub get_my_roles {
1542: my ($uname,$udom)=@_;
1543: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1544: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1545: my %dumphash=
1546: &dump('nohist_userroles',$udom,$uname);
1547: my %returnhash=();
1548: my $now=time;
1549: foreach (keys %dumphash) {
1550: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1551: if (($tstart) && ($tstart<0)) { next; }
1552: if (($tend) && ($tend<$now)) { next; }
1553: if (($tstart) && ($now<$tstart)) { next; }
1554: my ($role,$username,$domain,$section)=split(/\:/,$_);
1555: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1556: }
1557: return %returnhash;
1558: }
1559:
1560: # ----------------------------------------------------- Frontpage Announcements
1561: #
1562: #
1563:
1564: sub postannounce {
1565: my ($server,$text)=@_;
1566: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1567: unless ($text=~/\w/) { $text=''; }
1568: return &reply('setannounce:'.&escape($text),$server);
1569: }
1570:
1571: sub getannounce {
1572:
1573: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1574: my $announcement='';
1575: while (<$fh>) { $announcement .=$_; }
1576: close($fh);
1577: if ($announcement=~/\w/) {
1578: return
1579: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1580: '<tr><td bgcolor="#FFFFFF"><pre>'.$announcement.'</pre></td></tr></table>';
1581: } else {
1582: return '';
1583: }
1584: } else {
1585: return '';
1586: }
1587: }
1588:
1589: # ---------------------------------------------------------- Course ID routines
1590: # Deal with domain's nohist_courseid.db files
1591: #
1592:
1593: sub courseidput {
1594: my ($domain,$what,$coursehome)=@_;
1595: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1596: }
1597:
1598: sub courseiddump {
1599: my ($domfilter,$descfilter,$sincefilter)=@_;
1600: my %returnhash=();
1601: unless ($domfilter) { $domfilter=''; }
1602: foreach my $tryserver (keys %libserv) {
1603: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1604: foreach (
1605: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1606: $sincefilter.':'.&escape($descfilter),
1607: $tryserver))) {
1608: my ($key,$value)=split(/\=/,$_);
1609: if (($key) && ($value)) {
1610: $returnhash{&unescape($key)}=&unescape($value);
1611: }
1612: }
1613:
1614: }
1615: }
1616: return %returnhash;
1617: }
1618:
1619: #
1620: # ----------------------------------------------------------- Check out an item
1621:
1622: sub checkout {
1623: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1624: my $now=time;
1625: my $lonhost=$perlvar{'lonHostID'};
1626: my $infostr=&escape(
1627: 'CHECKOUTTOKEN&'.
1628: $tuname.'&'.
1629: $tudom.'&'.
1630: $tcrsid.'&'.
1631: $symb.'&'.
1632: $now.'&'.$ENV{'REMOTE_ADDR'});
1633: my $token=&reply('tmpput:'.$infostr,$lonhost);
1634: if ($token=~/^error\:/) {
1635: &logthis("<font color=blue>WARNING: ".
1636: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1637: "</font>");
1638: return '';
1639: }
1640:
1641: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1642: $token=~tr/a-z/A-Z/;
1643:
1644: my %infohash=('resource.0.outtoken' => $token,
1645: 'resource.0.checkouttime' => $now,
1646: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1647:
1648: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1649: return '';
1650: } else {
1651: &logthis("<font color=blue>WARNING: ".
1652: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1653: "</font>");
1654: }
1655:
1656: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1657: &escape('Checkout '.$infostr.' - '.
1658: $token)) ne 'ok') {
1659: return '';
1660: } else {
1661: &logthis("<font color=blue>WARNING: ".
1662: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1663: "</font>");
1664: }
1665: return $token;
1666: }
1667:
1668: # ------------------------------------------------------------ Check in an item
1669:
1670: sub checkin {
1671: my $token=shift;
1672: my $now=time;
1673: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1674: $lonhost=~tr/A-Z/a-z/;
1675: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1676: $dtoken=~s/\W/\_/g;
1677: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1678: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1679:
1680: unless (($tuname) && ($tudom)) {
1681: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1682: return '';
1683: }
1684:
1685: unless (&allowed('mgr',$tcrsid)) {
1686: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1687: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1688: return '';
1689: }
1690:
1691: my %infohash=('resource.0.intoken' => $token,
1692: 'resource.0.checkintime' => $now,
1693: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1694:
1695: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1696: return '';
1697: }
1698:
1699: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1700: &escape('Checkin - '.$token)) ne 'ok') {
1701: return '';
1702: }
1703:
1704: return ($symb,$tuname,$tudom,$tcrsid);
1705: }
1706:
1707: # --------------------------------------------- Set Expire Date for Spreadsheet
1708:
1709: sub expirespread {
1710: my ($uname,$udom,$stype,$usymb)=@_;
1711: my $cid=$ENV{'request.course.id'};
1712: if ($cid) {
1713: my $now=time;
1714: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1715: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1716: $ENV{'course.'.$cid.'.num'}.
1717: ':nohist_expirationdates:'.
1718: &escape($key).'='.$now,
1719: $ENV{'course.'.$cid.'.home'})
1720: }
1721: return 'ok';
1722: }
1723:
1724: # ----------------------------------------------------- Devalidate Spreadsheets
1725:
1726: sub devalidate {
1727: my ($symb,$uname,$udom)=@_;
1728: my $cid=$ENV{'request.course.id'};
1729: if ($cid) {
1730: # delete the stored spreadsheets for
1731: # - the student level sheet of this user in course's homespace
1732: # - the assessment level sheet for this resource
1733: # for this user in user's homespace
1734: my $key=$uname.':'.$udom.':';
1735: my $status=
1736: &del('nohist_calculatedsheets',
1737: [$key.'studentcalc:'],
1738: $ENV{'course.'.$cid.'.domain'},
1739: $ENV{'course.'.$cid.'.num'})
1740: .' '.
1741: &del('nohist_calculatedsheets_'.$cid,
1742: [$key.'assesscalc:'.$symb],$udom,$uname);
1743: unless ($status eq 'ok ok') {
1744: &logthis('Could not devalidate spreadsheet '.
1745: $uname.' at '.$udom.' for '.
1746: $symb.': '.$status);
1747: }
1748: }
1749: }
1750:
1751: sub get_scalar {
1752: my ($string,$end) = @_;
1753: my $value;
1754: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1755: $value = $1;
1756: } elsif ($$string =~ s/^([^&]*?)&//) {
1757: $value = $1;
1758: }
1759: return &unescape($value);
1760: }
1761:
1762: sub array2str {
1763: my (@array) = @_;
1764: my $result=&arrayref2str(\@array);
1765: $result=~s/^__ARRAY_REF__//;
1766: $result=~s/__END_ARRAY_REF__$//;
1767: return $result;
1768: }
1769:
1770: sub arrayref2str {
1771: my ($arrayref) = @_;
1772: my $result='__ARRAY_REF__';
1773: foreach my $elem (@$arrayref) {
1774: if(ref($elem) eq 'ARRAY') {
1775: $result.=&arrayref2str($elem).'&';
1776: } elsif(ref($elem) eq 'HASH') {
1777: $result.=&hashref2str($elem).'&';
1778: } elsif(ref($elem)) {
1779: #print("Got a ref of ".(ref($elem))." skipping.");
1780: } else {
1781: $result.=&escape($elem).'&';
1782: }
1783: }
1784: $result=~s/\&$//;
1785: $result .= '__END_ARRAY_REF__';
1786: return $result;
1787: }
1788:
1789: sub hash2str {
1790: my (%hash) = @_;
1791: my $result=&hashref2str(\%hash);
1792: $result=~s/^__HASH_REF__//;
1793: $result=~s/__END_HASH_REF__$//;
1794: return $result;
1795: }
1796:
1797: sub hashref2str {
1798: my ($hashref)=@_;
1799: my $result='__HASH_REF__';
1800: foreach (keys(%$hashref)) {
1801: if (ref($_) eq 'ARRAY') {
1802: $result.=&arrayref2str($_).'=';
1803: } elsif (ref($_) eq 'HASH') {
1804: $result.=&hashref2str($_).'=';
1805: } elsif (ref($_)) {
1806: $result.='=';
1807: #print("Got a ref of ".(ref($_))." skipping.");
1808: } else {
1809: if ($_) {$result.=&escape($_).'=';} else { last; }
1810: }
1811:
1812: if(ref($hashref->{$_}) eq 'ARRAY') {
1813: $result.=&arrayref2str($hashref->{$_}).'&';
1814: } elsif(ref($hashref->{$_}) eq 'HASH') {
1815: $result.=&hashref2str($hashref->{$_}).'&';
1816: } elsif(ref($hashref->{$_})) {
1817: $result.='&';
1818: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1819: } else {
1820: $result.=&escape($hashref->{$_}).'&';
1821: }
1822: }
1823: $result=~s/\&$//;
1824: $result .= '__END_HASH_REF__';
1825: return $result;
1826: }
1827:
1828: sub str2hash {
1829: my ($string)=@_;
1830: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1831: return %$hash;
1832: }
1833:
1834: sub str2hashref {
1835: my ($string) = @_;
1836:
1837: my %hash;
1838:
1839: if($string !~ /^__HASH_REF__/) {
1840: if (! ($string eq '' || !defined($string))) {
1841: $hash{'error'}='Not hash reference';
1842: }
1843: return (\%hash, $string);
1844: }
1845:
1846: $string =~ s/^__HASH_REF__//;
1847:
1848: while($string !~ /^__END_HASH_REF__/) {
1849: #key
1850: my $key='';
1851: if($string =~ /^__HASH_REF__/) {
1852: ($key, $string)=&str2hashref($string);
1853: if(defined($key->{'error'})) {
1854: $hash{'error'}='Bad data';
1855: return (\%hash, $string);
1856: }
1857: } elsif($string =~ /^__ARRAY_REF__/) {
1858: ($key, $string)=&str2arrayref($string);
1859: if($key->[0] eq 'Array reference error') {
1860: $hash{'error'}='Bad data';
1861: return (\%hash, $string);
1862: }
1863: } else {
1864: $string =~ s/^(.*?)=//;
1865: $key=&unescape($1);
1866: }
1867: $string =~ s/^=//;
1868:
1869: #value
1870: my $value='';
1871: if($string =~ /^__HASH_REF__/) {
1872: ($value, $string)=&str2hashref($string);
1873: if(defined($value->{'error'})) {
1874: $hash{'error'}='Bad data';
1875: return (\%hash, $string);
1876: }
1877: } elsif($string =~ /^__ARRAY_REF__/) {
1878: ($value, $string)=&str2arrayref($string);
1879: if($value->[0] eq 'Array reference error') {
1880: $hash{'error'}='Bad data';
1881: return (\%hash, $string);
1882: }
1883: } else {
1884: $value=&get_scalar(\$string,'__END_HASH_REF__');
1885: }
1886: $string =~ s/^&//;
1887:
1888: $hash{$key}=$value;
1889: }
1890:
1891: $string =~ s/^__END_HASH_REF__//;
1892:
1893: return (\%hash, $string);
1894: }
1895:
1896: sub str2array {
1897: my ($string)=@_;
1898: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1899: return @$array;
1900: }
1901:
1902: sub str2arrayref {
1903: my ($string) = @_;
1904: my @array;
1905:
1906: if($string !~ /^__ARRAY_REF__/) {
1907: if (! ($string eq '' || !defined($string))) {
1908: $array[0]='Array reference error';
1909: }
1910: return (\@array, $string);
1911: }
1912:
1913: $string =~ s/^__ARRAY_REF__//;
1914:
1915: while($string !~ /^__END_ARRAY_REF__/) {
1916: my $value='';
1917: if($string =~ /^__HASH_REF__/) {
1918: ($value, $string)=&str2hashref($string);
1919: if(defined($value->{'error'})) {
1920: $array[0] ='Array reference error';
1921: return (\@array, $string);
1922: }
1923: } elsif($string =~ /^__ARRAY_REF__/) {
1924: ($value, $string)=&str2arrayref($string);
1925: if($value->[0] eq 'Array reference error') {
1926: $array[0] ='Array reference error';
1927: return (\@array, $string);
1928: }
1929: } else {
1930: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1931: }
1932: $string =~ s/^&//;
1933:
1934: push(@array, $value);
1935: }
1936:
1937: $string =~ s/^__END_ARRAY_REF__//;
1938:
1939: return (\@array, $string);
1940: }
1941:
1942: # -------------------------------------------------------------------Temp Store
1943:
1944: sub tmpreset {
1945: my ($symb,$namespace,$domain,$stuname) = @_;
1946: if (!$symb) {
1947: $symb=&symbread();
1948: if (!$symb) { $symb= $ENV{'request.url'}; }
1949: }
1950: $symb=escape($symb);
1951:
1952: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1953: $namespace=~s/\//\_/g;
1954: $namespace=~s/\W//g;
1955:
1956: #FIXME needs to do something for /pub resources
1957: if (!$domain) { $domain=$ENV{'user.domain'}; }
1958: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1959: my $path=$perlvar{'lonDaemons'}.'/tmp';
1960: my %hash;
1961: if (tie(%hash,'GDBM_File',
1962: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1963: &GDBM_WRCREAT(),0640)) {
1964: foreach my $key (keys %hash) {
1965: if ($key=~ /:$symb/) {
1966: delete($hash{$key});
1967: }
1968: }
1969: }
1970: }
1971:
1972: sub tmpstore {
1973: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1974:
1975: if (!$symb) {
1976: $symb=&symbread();
1977: if (!$symb) { $symb= $ENV{'request.url'}; }
1978: }
1979: $symb=escape($symb);
1980:
1981: if (!$namespace) {
1982: # I don't think we would ever want to store this for a course.
1983: # it seems this will only be used if we don't have a course.
1984: #$namespace=$ENV{'request.course.id'};
1985: #if (!$namespace) {
1986: $namespace=$ENV{'request.state'};
1987: #}
1988: }
1989: $namespace=~s/\//\_/g;
1990: $namespace=~s/\W//g;
1991: #FIXME needs to do something for /pub resources
1992: if (!$domain) { $domain=$ENV{'user.domain'}; }
1993: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1994: my $now=time;
1995: my %hash;
1996: my $path=$perlvar{'lonDaemons'}.'/tmp';
1997: if (tie(%hash,'GDBM_File',
1998: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1999: &GDBM_WRCREAT(),0640)) {
2000: $hash{"version:$symb"}++;
2001: my $version=$hash{"version:$symb"};
2002: my $allkeys='';
2003: foreach my $key (keys(%$storehash)) {
2004: $allkeys.=$key.':';
2005: $hash{"$version:$symb:$key"}=$$storehash{$key};
2006: }
2007: $hash{"$version:$symb:timestamp"}=$now;
2008: $allkeys.='timestamp';
2009: $hash{"$version:keys:$symb"}=$allkeys;
2010: if (untie(%hash)) {
2011: return 'ok';
2012: } else {
2013: return "error:$!";
2014: }
2015: } else {
2016: return "error:$!";
2017: }
2018: }
2019:
2020: # -----------------------------------------------------------------Temp Restore
2021:
2022: sub tmprestore {
2023: my ($symb,$namespace,$domain,$stuname) = @_;
2024:
2025: if (!$symb) {
2026: $symb=&symbread();
2027: if (!$symb) { $symb= $ENV{'request.url'}; }
2028: }
2029: $symb=escape($symb);
2030:
2031: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2032: #FIXME needs to do something for /pub resources
2033: if (!$domain) { $domain=$ENV{'user.domain'}; }
2034: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2035:
2036: my %returnhash;
2037: $namespace=~s/\//\_/g;
2038: $namespace=~s/\W//g;
2039: my %hash;
2040: my $path=$perlvar{'lonDaemons'}.'/tmp';
2041: if (tie(%hash,'GDBM_File',
2042: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2043: &GDBM_READER(),0640)) {
2044: my $version=$hash{"version:$symb"};
2045: $returnhash{'version'}=$version;
2046: my $scope;
2047: for ($scope=1;$scope<=$version;$scope++) {
2048: my $vkeys=$hash{"$scope:keys:$symb"};
2049: my @keys=split(/:/,$vkeys);
2050: my $key;
2051: $returnhash{"$scope:keys"}=$vkeys;
2052: foreach $key (@keys) {
2053: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
2054: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
2055: }
2056: }
2057: if (!(untie(%hash))) {
2058: return "error:$!";
2059: }
2060: } else {
2061: return "error:$!";
2062: }
2063: return %returnhash;
2064: }
2065:
2066: # ----------------------------------------------------------------------- Store
2067:
2068: sub store {
2069: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2070: my $home='';
2071:
2072: if ($stuname) { $home=&homeserver($stuname,$domain); }
2073:
2074: $symb=&symbclean($symb);
2075: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2076:
2077: if (!$domain) { $domain=$ENV{'user.domain'}; }
2078: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2079:
2080: &devalidate($symb,$stuname,$domain);
2081:
2082: $symb=escape($symb);
2083: if (!$namespace) {
2084: unless ($namespace=$ENV{'request.course.id'}) {
2085: return '';
2086: }
2087: }
2088: if (!$home) { $home=$ENV{'user.home'}; }
2089:
2090: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2091: $$storehash{'host'}=$perlvar{'lonHostID'};
2092:
2093: my $namevalue='';
2094: foreach (keys %$storehash) {
2095: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2096: }
2097: $namevalue=~s/\&$//;
2098: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2099: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2100: }
2101:
2102: # -------------------------------------------------------------- Critical Store
2103:
2104: sub cstore {
2105: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2106: my $home='';
2107:
2108: if ($stuname) { $home=&homeserver($stuname,$domain); }
2109:
2110: $symb=&symbclean($symb);
2111: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2112:
2113: if (!$domain) { $domain=$ENV{'user.domain'}; }
2114: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2115:
2116: &devalidate($symb,$stuname,$domain);
2117:
2118: $symb=escape($symb);
2119: if (!$namespace) {
2120: unless ($namespace=$ENV{'request.course.id'}) {
2121: return '';
2122: }
2123: }
2124: if (!$home) { $home=$ENV{'user.home'}; }
2125:
2126: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2127: $$storehash{'host'}=$perlvar{'lonHostID'};
2128:
2129: my $namevalue='';
2130: foreach (keys %$storehash) {
2131: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2132: }
2133: $namevalue=~s/\&$//;
2134: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2135: return critical
2136: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2137: }
2138:
2139: # --------------------------------------------------------------------- Restore
2140:
2141: sub restore {
2142: my ($symb,$namespace,$domain,$stuname) = @_;
2143: my $home='';
2144:
2145: if ($stuname) { $home=&homeserver($stuname,$domain); }
2146:
2147: if (!$symb) {
2148: unless ($symb=escape(&symbread())) { return ''; }
2149: } else {
2150: $symb=&escape(&symbclean($symb));
2151: }
2152: if (!$namespace) {
2153: unless ($namespace=$ENV{'request.course.id'}) {
2154: return '';
2155: }
2156: }
2157: if (!$domain) { $domain=$ENV{'user.domain'}; }
2158: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2159: if (!$home) { $home=$ENV{'user.home'}; }
2160: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2161:
2162: my %returnhash=();
2163: foreach (split(/\&/,$answer)) {
2164: my ($name,$value)=split(/\=/,$_);
2165: $returnhash{&unescape($name)}=&unescape($value);
2166: }
2167: my $version;
2168: for ($version=1;$version<=$returnhash{'version'};$version++) {
2169: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2170: $returnhash{$_}=$returnhash{$version.':'.$_};
2171: }
2172: }
2173: return %returnhash;
2174: }
2175:
2176: # ---------------------------------------------------------- Course Description
2177:
2178: sub coursedescription {
2179: my $courseid=shift;
2180: $courseid=~s/^\///;
2181: $courseid=~s/\_/\//g;
2182: my ($cdomain,$cnum)=split(/\//,$courseid);
2183: my $chome=&homeserver($cnum,$cdomain);
2184: my $normalid=$cdomain.'_'.$cnum;
2185: # need to always cache even if we get errors otherwise we keep
2186: # trying and trying and trying to get the course description.
2187: my %envhash=();
2188: my %returnhash=();
2189: $envhash{'course.'.$normalid.'.last_cache'}=time;
2190: if ($chome ne 'no_host') {
2191: %returnhash=&dump('environment',$cdomain,$cnum);
2192: if (!exists($returnhash{'con_lost'})) {
2193: $returnhash{'home'}= $chome;
2194: $returnhash{'domain'} = $cdomain;
2195: $returnhash{'num'} = $cnum;
2196: while (my ($name,$value) = each %returnhash) {
2197: $envhash{'course.'.$normalid.'.'.$name}=$value;
2198: }
2199: $returnhash{'url'}=&clutter($returnhash{'url'});
2200: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2201: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
2202: $envhash{'course.'.$normalid.'.home'}=$chome;
2203: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2204: $envhash{'course.'.$normalid.'.num'}=$cnum;
2205: }
2206: }
2207: &appenv(%envhash);
2208: return %returnhash;
2209: }
2210:
2211: # -------------------------------------------------See if a user is privileged
2212:
2213: sub privileged {
2214: my ($username,$domain)=@_;
2215: my $rolesdump=&reply("dump:$domain:$username:roles",
2216: &homeserver($username,$domain));
2217: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2218: my $now=time;
2219: if ($rolesdump ne '') {
2220: foreach (split(/&/,$rolesdump)) {
2221: if ($_!~/^rolesdef\&/) {
2222: my ($area,$role)=split(/=/,$_);
2223: $area=~s/\_\w\w$//;
2224: my ($trole,$tend,$tstart)=split(/_/,$role);
2225: if (($trole eq 'dc') || ($trole eq 'su')) {
2226: my $active=1;
2227: if ($tend) {
2228: if ($tend<$now) { $active=0; }
2229: }
2230: if ($tstart) {
2231: if ($tstart>$now) { $active=0; }
2232: }
2233: if ($active) { return 1; }
2234: }
2235: }
2236: }
2237: }
2238: return 0;
2239: }
2240:
2241: # -------------------------------------------------------- Get user privileges
2242:
2243: sub rolesinit {
2244: my ($domain,$username,$authhost)=@_;
2245: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2246: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2247: my %allroles=();
2248: my %thesepriv=();
2249: my $now=time;
2250: my $userroles="user.login.time=$now\n";
2251: my $thesestr;
2252:
2253: if ($rolesdump ne '') {
2254: foreach (split(/&/,$rolesdump)) {
2255: if ($_!~/^rolesdef\&/) {
2256: my ($area,$role)=split(/=/,$_);
2257: $area=~s/\_\w\w$//;
2258: my ($trole,$tend,$tstart)=split(/_/,$role);
2259: $userroles.='user.role.'.$trole.'.'.$area.'='.
2260: $tstart.'.'.$tend."\n";
2261: # log the associated role with the area
2262: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2263: if ($tend!=0) {
2264: if ($tend<$now) {
2265: $trole='';
2266: }
2267: }
2268: if ($tstart!=0) {
2269: if ($tstart>$now) {
2270: $trole='';
2271: }
2272: }
2273: if (($area ne '') && ($trole ne '')) {
2274: my $spec=$trole.'.'.$area;
2275: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2276: if ($trole =~ /^cr\//) {
2277: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2278: my $homsvr=homeserver($rauthor,$rdomain);
2279: if ($hostname{$homsvr} ne '') {
2280: my ($rdummy,$roledef)=
2281: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2282:
2283: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2284: my ($syspriv,$dompriv,$coursepriv)=
2285: split(/\_/,$roledef);
2286: if (defined($syspriv)) {
2287: $allroles{'cm./'}.=':'.$syspriv;
2288: $allroles{$spec.'./'}.=':'.$syspriv;
2289: }
2290: if ($tdomain ne '') {
2291: if (defined($dompriv)) {
2292: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2293: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2294: }
2295: if ($trest ne '') {
2296: if (defined($coursepriv)) {
2297: $allroles{'cm.'.$area}.=':'.$coursepriv;
2298: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
2299: }
2300: }
2301: }
2302: }
2303: }
2304: } else {
2305: if (defined($pr{$trole.':s'})) {
2306: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
2307: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2308: }
2309: if ($tdomain ne '') {
2310: if (defined($pr{$trole.':d'})) {
2311: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2312: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2313: }
2314: if ($trest ne '') {
2315: if (defined($pr{$trole.':c'})) {
2316: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2317: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2318: }
2319: }
2320: }
2321: }
2322: }
2323: }
2324: }
2325: my $adv=0;
2326: my $author=0;
2327: foreach (keys %allroles) {
2328: %thesepriv=();
2329: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
2330: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2331: foreach (split(/:/,$allroles{$_})) {
2332: if ($_ ne '') {
2333: my ($privilege,$restrictions)=split(/&/,$_);
2334: if ($restrictions eq '') {
2335: $thesepriv{$privilege}='F';
2336: } else {
2337: if ($thesepriv{$privilege} ne 'F') {
2338: $thesepriv{$privilege}.=$restrictions;
2339: }
2340: }
2341: }
2342: }
2343: $thesestr='';
2344: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2345: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
2346: }
2347: $userroles.='user.adv='.$adv."\n".
2348: 'user.author='.$author."\n";
2349: $ENV{'user.adv'}=$adv;
2350: }
2351: return $userroles;
2352: }
2353:
2354: # --------------------------------------------------------------- get interface
2355:
2356: sub get {
2357: my ($namespace,$storearr,$udomain,$uname)=@_;
2358: my $items='';
2359: foreach (@$storearr) {
2360: $items.=escape($_).'&';
2361: }
2362: $items=~s/\&$//;
2363: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2364: if (!$uname) { $uname=$ENV{'user.name'}; }
2365: my $uhome=&homeserver($uname,$udomain);
2366:
2367: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2368: my @pairs=split(/\&/,$rep);
2369: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2370: return @pairs;
2371: }
2372: my %returnhash=();
2373: my $i=0;
2374: foreach (@$storearr) {
2375: $returnhash{$_}=unescape($pairs[$i]);
2376: $i++;
2377: }
2378: return %returnhash;
2379: }
2380:
2381: # --------------------------------------------------------------- del interface
2382:
2383: sub del {
2384: my ($namespace,$storearr,$udomain,$uname)=@_;
2385: my $items='';
2386: foreach (@$storearr) {
2387: $items.=escape($_).'&';
2388: }
2389: $items=~s/\&$//;
2390: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2391: if (!$uname) { $uname=$ENV{'user.name'}; }
2392: my $uhome=&homeserver($uname,$udomain);
2393:
2394: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2395: }
2396:
2397: # -------------------------------------------------------------- dump interface
2398:
2399: sub dump {
2400: my ($namespace,$udomain,$uname,$regexp)=@_;
2401: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2402: if (!$uname) { $uname=$ENV{'user.name'}; }
2403: my $uhome=&homeserver($uname,$udomain);
2404: if ($regexp) {
2405: $regexp=&escape($regexp);
2406: } else {
2407: $regexp='.';
2408: }
2409: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2410: my @pairs=split(/\&/,$rep);
2411: my %returnhash=();
2412: foreach (@pairs) {
2413: my ($key,$value)=split(/=/,$_);
2414: $returnhash{unescape($key)}=unescape($value);
2415: }
2416: return %returnhash;
2417: }
2418:
2419: # -------------------------------------------------------------- keys interface
2420:
2421: sub getkeys {
2422: my ($namespace,$udomain,$uname)=@_;
2423: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2424: if (!$uname) { $uname=$ENV{'user.name'}; }
2425: my $uhome=&homeserver($uname,$udomain);
2426: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2427: my @keyarray=();
2428: foreach (split(/\&/,$rep)) {
2429: push (@keyarray,&unescape($_));
2430: }
2431: return @keyarray;
2432: }
2433:
2434: # --------------------------------------------------------------- currentdump
2435: sub currentdump {
2436: my ($courseid,$sdom,$sname)=@_;
2437: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2438: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2439: $sname = $ENV{'user.name'} if (! defined($sname));
2440: my $uhome = &homeserver($sname,$sdom);
2441: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2442: return if ($rep =~ /^(error:|no_such_host)/);
2443: #
2444: my %returnhash=();
2445: #
2446: if ($rep eq "unknown_cmd") {
2447: # an old lond will not know currentdump
2448: # Do a dump and make it look like a currentdump
2449: my @tmp = &dump($courseid,$sdom,$sname,'.');
2450: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2451: my %hash = @tmp;
2452: @tmp=();
2453: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2454: } else {
2455: my @pairs=split(/\&/,$rep);
2456: foreach (@pairs) {
2457: my ($key,$value)=split(/=/,$_);
2458: my ($symb,$param) = split(/:/,$key);
2459: $returnhash{&unescape($symb)}->{&unescape($param)} =
2460: &unescape($value);
2461: }
2462: }
2463: return %returnhash;
2464: }
2465:
2466: sub convert_dump_to_currentdump{
2467: my %hash = %{shift()};
2468: my %returnhash;
2469: # Code ripped from lond, essentially. The only difference
2470: # here is the unescaping done by lonnet::dump(). Conceivably
2471: # we might run in to problems with parameter names =~ /^v\./
2472: while (my ($key,$value) = each(%hash)) {
2473: my ($v,$symb,$param) = split(/:/,$key);
2474: next if ($v eq 'version' || $symb eq 'keys');
2475: next if (exists($returnhash{$symb}) &&
2476: exists($returnhash{$symb}->{$param}) &&
2477: $returnhash{$symb}->{'v.'.$param} > $v);
2478: $returnhash{$symb}->{$param}=$value;
2479: $returnhash{$symb}->{'v.'.$param}=$v;
2480: }
2481: #
2482: # Remove all of the keys in the hashes which keep track of
2483: # the version of the parameter.
2484: while (my ($symb,$param_hash) = each(%returnhash)) {
2485: # use a foreach because we are going to delete from the hash.
2486: foreach my $key (keys(%$param_hash)) {
2487: delete($param_hash->{$key}) if ($key =~ /^v\./);
2488: }
2489: }
2490: return \%returnhash;
2491: }
2492:
2493: # --------------------------------------------------------------- inc interface
2494:
2495: sub inc {
2496: my ($namespace,$store,$udomain,$uname) = @_;
2497: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2498: if (!$uname) { $uname=$ENV{'user.name'}; }
2499: my $uhome=&homeserver($uname,$udomain);
2500: my $items='';
2501: if (! ref($store)) {
2502: # got a single value, so use that instead
2503: $items = &escape($store).'=&';
2504: } elsif (ref($store) eq 'SCALAR') {
2505: $items = &escape($$store).'=&';
2506: } elsif (ref($store) eq 'ARRAY') {
2507: $items = join('=&',map {&escape($_);} @{$store});
2508: } elsif (ref($store) eq 'HASH') {
2509: while (my($key,$value) = each(%{$store})) {
2510: $items.= &escape($key).'='.&escape($value).'&';
2511: }
2512: }
2513: $items=~s/\&$//;
2514: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2515: }
2516:
2517: # --------------------------------------------------------------- put interface
2518:
2519: sub put {
2520: my ($namespace,$storehash,$udomain,$uname)=@_;
2521: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2522: if (!$uname) { $uname=$ENV{'user.name'}; }
2523: my $uhome=&homeserver($uname,$udomain);
2524: my $items='';
2525: foreach (keys %$storehash) {
2526: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
2527: }
2528: $items=~s/\&$//;
2529: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2530: }
2531:
2532: # ------------------------------------------------------ critical put interface
2533:
2534: sub cput {
2535: my ($namespace,$storehash,$udomain,$uname)=@_;
2536: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2537: if (!$uname) { $uname=$ENV{'user.name'}; }
2538: my $uhome=&homeserver($uname,$udomain);
2539: my $items='';
2540: foreach (keys %$storehash) {
2541: $items.=escape($_).'='.escape($$storehash{$_}).'&';
2542: }
2543: $items=~s/\&$//;
2544: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2545: }
2546:
2547: # -------------------------------------------------------------- eget interface
2548:
2549: sub eget {
2550: my ($namespace,$storearr,$udomain,$uname)=@_;
2551: my $items='';
2552: foreach (@$storearr) {
2553: $items.=escape($_).'&';
2554: }
2555: $items=~s/\&$//;
2556: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2557: if (!$uname) { $uname=$ENV{'user.name'}; }
2558: my $uhome=&homeserver($uname,$udomain);
2559: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2560: my @pairs=split(/\&/,$rep);
2561: my %returnhash=();
2562: my $i=0;
2563: foreach (@$storearr) {
2564: $returnhash{$_}=unescape($pairs[$i]);
2565: $i++;
2566: }
2567: return %returnhash;
2568: }
2569:
2570: # ---------------------------------------------- Custom access rule evaluation
2571:
2572: sub customaccess {
2573: my ($priv,$uri)=@_;
2574: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2575: $urealm=~s/^\W//;
2576: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2577: my $access=0;
2578: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2579: my ($effect,$realm,$role)=split(/\:/,$_);
2580: if ($role) {
2581: if ($role ne $urole) { next; }
2582: }
2583: foreach (split(/\s*\,\s*/,$realm)) {
2584: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2585: if ($tdom) {
2586: if ($tdom ne $udom) { next; }
2587: }
2588: if ($tcrs) {
2589: if ($tcrs ne $ucrs) { next; }
2590: }
2591: if ($tsec) {
2592: if ($tsec ne $usec) { next; }
2593: }
2594: $access=($effect eq 'allow');
2595: last;
2596: }
2597: if ($realm eq '' && $role eq '') {
2598: $access=($effect eq 'allow');
2599: }
2600: }
2601: return $access;
2602: }
2603:
2604: # ------------------------------------------------- Check for a user privilege
2605:
2606: sub allowed {
2607: my ($priv,$uri)=@_;
2608: $uri=&deversion($uri);
2609: my $orguri=$uri;
2610: $uri=&declutter($uri);
2611:
2612: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
2613: # Free bre access to adm and meta resources
2614:
2615: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2616: return 'F';
2617: }
2618:
2619: # Free bre to public access
2620:
2621: if ($priv eq 'bre') {
2622: my $copyright=&metadata($uri,'copyright');
2623: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2624: return 'F';
2625: }
2626: if ($copyright eq 'priv') {
2627: $uri=~/([^\/]+)\/([^\/]+)\//;
2628: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2629: return '';
2630: }
2631: }
2632: if ($copyright eq 'domain') {
2633: $uri=~/([^\/]+)\/([^\/]+)\//;
2634: unless (($ENV{'user.domain'} eq $1) ||
2635: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2636: return '';
2637: }
2638: }
2639: if ($ENV{'request.role'}=~ /li\.\//) {
2640: # Library role, so allow browsing of resources in this domain.
2641: return 'F';
2642: }
2643: if ($copyright eq 'custom') {
2644: unless (&customaccess($priv,$uri)) { return ''; }
2645: }
2646: }
2647: # Domain coordinator is trying to create a course
2648: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2649: # uri is the requested domain in this case.
2650: # comparison to 'request.role.domain' shows if the user has selected
2651: # a role of dc for the domain in question.
2652: return 'F' if ($uri eq $ENV{'request.role.domain'});
2653: }
2654:
2655: my $thisallowed='';
2656: my $statecond=0;
2657: my $courseprivid='';
2658:
2659: # Course
2660:
2661: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
2662: $thisallowed.=$1;
2663: }
2664:
2665: # Domain
2666:
2667: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2668: =~/\Q$priv\E\&([^\:]*)/) {
2669: $thisallowed.=$1;
2670: }
2671:
2672: # Course: uri itself is a course
2673: my $courseuri=$uri;
2674: $courseuri=~s/\_(\d)/\/$1/;
2675: $courseuri=~s/^([^\/])/\/$1/;
2676:
2677: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2678: =~/\Q$priv\E\&([^\:]*)/) {
2679: $thisallowed.=$1;
2680: }
2681:
2682: # URI is an uploaded document for this course
2683:
2684: if (($priv eq 'bre') &&
2685: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2686: return 'F';
2687: }
2688: # Full access at system, domain or course-wide level? Exit.
2689:
2690: if ($thisallowed=~/F/) {
2691: return 'F';
2692: }
2693:
2694: # If this is generating or modifying users, exit with special codes
2695:
2696: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:\Q$priv\E\:/) {
2697: return $thisallowed;
2698: }
2699: #
2700: # Gathered so far: system, domain and course wide privileges
2701: #
2702: # Course: See if uri or referer is an individual resource that is part of
2703: # the course
2704:
2705: if ($ENV{'request.course.id'}) {
2706:
2707: $courseprivid=$ENV{'request.course.id'};
2708: if ($ENV{'request.course.sec'}) {
2709: $courseprivid.='/'.$ENV{'request.course.sec'};
2710: }
2711: $courseprivid=~s/\_/\//;
2712: my $checkreferer=1;
2713: my ($match,$cond)=&is_on_map($uri);
2714: if ($match) {
2715: $statecond=$cond;
2716: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2717: =~/\Q$priv\E\&([^\:]*)/) {
2718: $thisallowed.=$1;
2719: $checkreferer=0;
2720: }
2721: }
2722:
2723: if ($checkreferer) {
2724: my $refuri=$ENV{'httpref.'.$orguri};
2725: unless ($refuri) {
2726: foreach (keys %ENV) {
2727: if ($_=~/^httpref\..*\*/) {
2728: my $pattern=$_;
2729: $pattern=~s/^httpref\.\/res\///;
2730: $pattern=~s/\*/\[\^\/\]\+/g;
2731: $pattern=~s/\//\\\//g;
2732: if ($orguri=~/$pattern/) {
2733: $refuri=$ENV{$_};
2734: }
2735: }
2736: }
2737: }
2738:
2739: if ($refuri) {
2740: $refuri=&declutter($refuri);
2741: my ($match,$cond)=&is_on_map($refuri);
2742: if ($match) {
2743: my $refstatecond=$cond;
2744: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2745: =~/\Q$priv\E\&([^\:]*)/) {
2746: $thisallowed.=$1;
2747: $uri=$refuri;
2748: $statecond=$refstatecond;
2749: }
2750: }
2751: }
2752: }
2753: }
2754:
2755: #
2756: # Gathered now: all privileges that could apply, and condition number
2757: #
2758: #
2759: # Full or no access?
2760: #
2761:
2762: if ($thisallowed=~/F/) {
2763: return 'F';
2764: }
2765:
2766: unless ($thisallowed) {
2767: return '';
2768: }
2769:
2770: # Restrictions exist, deal with them
2771: #
2772: # C:according to course preferences
2773: # R:according to resource settings
2774: # L:unless locked
2775: # X:according to user session state
2776: #
2777:
2778: # Possibly locked functionality, check all courses
2779: # Locks might take effect only after 10 minutes cache expiration for other
2780: # courses, and 2 minutes for current course
2781:
2782: my $envkey;
2783: if ($thisallowed=~/L/) {
2784: foreach $envkey (keys %ENV) {
2785: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2786: my $courseid=$2;
2787: my $roleid=$1.'.'.$2;
2788: $courseid=~s/^\///;
2789: my $expiretime=600;
2790: if ($ENV{'request.role'} eq $roleid) {
2791: $expiretime=120;
2792: }
2793: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2794: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2795: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2796: &coursedescription($courseid);
2797: }
2798: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
2799: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2800: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2801: &log($ENV{'user.domain'},$ENV{'user.name'},
2802: $ENV{'user.home'},
2803: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2804: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2805: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2806: return '';
2807: }
2808: }
2809: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
2810: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2811: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2812: &log($ENV{'user.domain'},$ENV{'user.name'},
2813: $ENV{'user.home'},
2814: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2815: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2816: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2817: return '';
2818: }
2819: }
2820: }
2821: }
2822: }
2823:
2824: #
2825: # Rest of the restrictions depend on selected course
2826: #
2827:
2828: unless ($ENV{'request.course.id'}) {
2829: return '1';
2830: }
2831:
2832: #
2833: # Now user is definitely in a course
2834: #
2835:
2836:
2837: # Course preferences
2838:
2839: if ($thisallowed=~/C/) {
2840: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2841: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2842: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2843: =~/\Q$rolecode\E/) {
2844: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2845: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2846: $ENV{'request.course.id'});
2847: return '';
2848: }
2849:
2850: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2851: =~/\Q$unamedom\E/) {
2852: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2853: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2854: $ENV{'request.course.id'});
2855: return '';
2856: }
2857: }
2858:
2859: # Resource preferences
2860:
2861: if ($thisallowed=~/R/) {
2862: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2863: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
2864: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2865: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2866: return '';
2867: }
2868: }
2869:
2870: # Restricted by state or randomout?
2871:
2872: if ($thisallowed=~/X/) {
2873: if ($ENV{'acc.randomout'}) {
2874: my $symb=&symbread($uri,1);
2875: if (($symb) && ($ENV{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
2876: return '';
2877: }
2878: }
2879: if (&condval($statecond)) {
2880: return '2';
2881: } else {
2882: return '';
2883: }
2884: }
2885:
2886: return 'F';
2887: }
2888:
2889: # --------------------------------------------------- Is a resource on the map?
2890:
2891: sub is_on_map {
2892: my $uri=&declutter(shift);
2893: $uri=~s/\.\d+\.(\w+)$/\.$1/;
2894: my @uriparts=split(/\//,$uri);
2895: my $filename=$uriparts[$#uriparts];
2896: my $pathname=$uri;
2897: $pathname=~s|/\Q$filename\E$||;
2898: $pathname=~s/^adm\/wrapper\///;
2899: #Trying to find the conditional for the file
2900: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2901: /\&\Q$filename\E\:([\d\|]+)\&/);
2902: if ($match) {
2903: return (1,$1);
2904: } else {
2905: return (0,0);
2906: }
2907: }
2908:
2909: # --------------------------------------------------------- Get symb from alias
2910:
2911: sub get_symb_from_alias {
2912: my $symb=shift;
2913: my ($map,$resid,$url)=&decode_symb($symb);
2914: # Already is a symb
2915: if ($url) { return $symb; }
2916: # Must be an alias
2917: my $aliassymb='';
2918: my %bighash;
2919: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2920: &GDBM_READER(),0640)) {
2921: my $rid=$bighash{'mapalias_'.$symb};
2922: if ($rid) {
2923: my ($mapid,$resid)=split(/\./,$rid);
2924: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
2925: $resid,$bighash{'src_'.$rid});
2926: }
2927: untie %bighash;
2928: }
2929: return $aliassymb;
2930: }
2931:
2932: # ----------------------------------------------------------------- Define Role
2933:
2934: sub definerole {
2935: if (allowed('mcr','/')) {
2936: my ($rolename,$sysrole,$domrole,$courole)=@_;
2937: foreach (split(':',$sysrole)) {
2938: my ($crole,$cqual)=split(/\&/,$_);
2939: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
2940: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
2941: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
2942: return "refused:s:$crole&$cqual";
2943: }
2944: }
2945: }
2946: foreach (split(':',$domrole)) {
2947: my ($crole,$cqual)=split(/\&/,$_);
2948: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
2949: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
2950: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
2951: return "refused:d:$crole&$cqual";
2952: }
2953: }
2954: }
2955: foreach (split(':',$courole)) {
2956: my ($crole,$cqual)=split(/\&/,$_);
2957: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
2958: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
2959: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
2960: return "refused:c:$crole&$cqual";
2961: }
2962: }
2963: }
2964: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2965: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2966: "rolesdef_$rolename=".
2967: escape($sysrole.'_'.$domrole.'_'.$courole);
2968: return reply($command,$ENV{'user.home'});
2969: } else {
2970: return 'refused';
2971: }
2972: }
2973:
2974: # ---------------- Make a metadata query against the network of library servers
2975:
2976: sub metadata_query {
2977: my ($query,$custom,$customshow,$server_array)=@_;
2978: my %rhash;
2979: my @server_list = (defined($server_array) ? @$server_array
2980: : keys(%libserv) );
2981: for my $server (@server_list) {
2982: unless ($custom or $customshow) {
2983: my $reply=&reply("querysend:".&escape($query),$server);
2984: $rhash{$server}=$reply;
2985: }
2986: else {
2987: my $reply=&reply("querysend:".&escape($query).':'.
2988: &escape($custom).':'.&escape($customshow),
2989: $server);
2990: $rhash{$server}=$reply;
2991: }
2992: }
2993: return \%rhash;
2994: }
2995:
2996: # ----------------------------------------- Send log queries and wait for reply
2997:
2998: sub log_query {
2999: my ($uname,$udom,$query,%filters)=@_;
3000: my $uhome=&homeserver($uname,$udom);
3001: if ($uhome eq 'no_host') { return 'error: no_host'; }
3002: my $uhost=$hostname{$uhome};
3003: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3004: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3005: $uhome);
3006: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3007: return get_query_reply($queryid);
3008: }
3009:
3010: sub get_query_reply {
3011: my $queryid=shift;
3012: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3013: my $reply='';
3014: for (1..100) {
3015: sleep 2;
3016: if (-e $replyfile.'.end') {
3017: if (open(my $fh,$replyfile)) {
3018: $reply.=<$fh>;
3019: close($fh);
3020: } else { return 'error: reply_file_error'; }
3021: return &unescape($reply);
3022: }
3023: }
3024: return 'timeout:'.$queryid;
3025: }
3026:
3027: sub courselog_query {
3028: #
3029: # possible filters:
3030: # url: url or symb
3031: # username
3032: # domain
3033: # action: view, submit, grade
3034: # start: timestamp
3035: # end: timestamp
3036: #
3037: my (%filters)=@_;
3038: unless ($ENV{'request.course.id'}) { return 'no_course'; }
3039: if ($filters{'url'}) {
3040: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3041: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3042: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3043: }
3044: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
3045: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
3046: return &log_query($cname,$cdom,'courselog',%filters);
3047: }
3048:
3049: sub userlog_query {
3050: my ($uname,$udom,%filters)=@_;
3051: return &log_query($uname,$udom,'userlog',%filters);
3052: }
3053:
3054: # ------------------------------------------------------------------ Plain Text
3055:
3056: sub plaintext {
3057: my $short=shift;
3058: return &mt($prp{$short});
3059: }
3060:
3061: # ----------------------------------------------------------------- Assign Role
3062:
3063: sub assignrole {
3064: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3065: my $mrole;
3066: if ($role =~ /^cr\//) {
3067: my $cwosec=$url;
3068: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3069: unless (&allowed('ccr',$cwosec)) {
3070: &logthis('Refused custom assignrole: '.
3071: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3072: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3073: return 'refused';
3074: }
3075: $mrole='cr';
3076: } else {
3077: my $cwosec=$url;
3078: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3079: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3080: &logthis('Refused assignrole: '.
3081: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3082: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3083: return 'refused';
3084: }
3085: $mrole=$role;
3086: }
3087: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3088: "$udom:$uname:$url".'_'."$mrole=$role";
3089: if ($end) { $command.='_'.$end; }
3090: if ($start) {
3091: if ($end) {
3092: $command.='_'.$start;
3093: } else {
3094: $command.='_0_'.$start;
3095: }
3096: }
3097: # actually delete
3098: if ($deleteflag) {
3099: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3100: # modify command to delete the role
3101: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
3102: "$udom:$uname:$url".'_'."$mrole";
3103: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
3104: # set start and finish to negative values for userrolelog
3105: $start=-1;
3106: $end=-1;
3107: }
3108: }
3109: # send command
3110: my $answer=&reply($command,&homeserver($uname,$udom));
3111: # log new user role if status is ok
3112: if ($answer eq 'ok') {
3113: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
3114: }
3115: return $answer;
3116: }
3117:
3118: # -------------------------------------------------- Modify user authentication
3119: # Overrides without validation
3120:
3121: sub modifyuserauth {
3122: my ($udom,$uname,$umode,$upass)=@_;
3123: my $uhome=&homeserver($uname,$udom);
3124: unless (&allowed('mau',$udom)) { return 'refused'; }
3125: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3126: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3127: ' in domain '.$ENV{'request.role.domain'});
3128: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3129: &escape($upass),$uhome);
3130: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
3131: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3132: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3133: &log($udom,,$uname,$uhome,
3134: 'Authentication changed by '.$ENV{'user.domain'}.', '.
3135: $ENV{'user.name'}.', '.$umode.
3136: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3137: unless ($reply eq 'ok') {
3138: &logthis('Authentication mode error: '.$reply);
3139: return 'error: '.$reply;
3140: }
3141: return 'ok';
3142: }
3143:
3144: # --------------------------------------------------------------- Modify a user
3145:
3146: sub modifyuser {
3147: my ($udom, $uname, $uid,
3148: $umode, $upass, $first,
3149: $middle, $last, $gene,
3150: $forceid, $desiredhome, $email)=@_;
3151: $udom=~s/\W//g;
3152: $uname=~s/\W//g;
3153: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3154: $umode.', '.$first.', '.$middle.', '.
3155: $last.', '.$gene.'(forceid: '.$forceid.')'.
3156: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3157: ' desiredhome not specified').
3158: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3159: ' in domain '.$ENV{'request.role.domain'});
3160: my $uhome=&homeserver($uname,$udom,'true');
3161: # ----------------------------------------------------------------- Create User
3162: if (($uhome eq 'no_host') &&
3163: (($umode && $upass) || ($umode eq 'localauth'))) {
3164: my $unhome='';
3165: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3166: $unhome = $desiredhome;
3167: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
3168: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
3169: } else { # load balancing routine for determining $unhome
3170: my $tryserver;
3171: my $loadm=10000000;
3172: foreach $tryserver (keys %libserv) {
3173: if ($hostdom{$tryserver} eq $udom) {
3174: my $answer=reply('load',$tryserver);
3175: if (($answer=~/\d+/) && ($answer<$loadm)) {
3176: $loadm=$answer;
3177: $unhome=$tryserver;
3178: }
3179: }
3180: }
3181: }
3182: if (($unhome eq '') || ($unhome eq 'no_host')) {
3183: return 'error: unable to find a home server for '.$uname.
3184: ' in domain '.$udom;
3185: }
3186: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3187: &escape($upass),$unhome);
3188: unless ($reply eq 'ok') {
3189: return 'error: '.$reply;
3190: }
3191: $uhome=&homeserver($uname,$udom,'true');
3192: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3193: return 'error: unable verify users home machine.';
3194: }
3195: } # End of creation of new user
3196: # ---------------------------------------------------------------------- Add ID
3197: if ($uid) {
3198: $uid=~tr/A-Z/a-z/;
3199: my %uidhash=&idrget($udom,$uname);
3200: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3201: && (!$forceid)) {
3202: unless ($uid eq $uidhash{$uname}) {
3203: return 'error: user id "'.$uid.'" does not match '.
3204: 'current user id "'.$uidhash{$uname}.'".';
3205: }
3206: } else {
3207: &idput($udom,($uname => $uid));
3208: }
3209: }
3210: # -------------------------------------------------------------- Add names, etc
3211: my @tmp=&get('environment',
3212: ['firstname','middlename','lastname','generation'],
3213: $udom,$uname);
3214: my %names;
3215: if ($tmp[0] =~ m/^error:.*/) {
3216: %names=();
3217: } else {
3218: %names = @tmp;
3219: }
3220: #
3221: # Make sure to not trash student environment if instructor does not bother
3222: # to supply name and email information
3223: #
3224: if ($first) { $names{'firstname'} = $first; }
3225: if (defined($middle)) { $names{'middlename'} = $middle; }
3226: if ($last) { $names{'lastname'} = $last; }
3227: if (defined($gene)) { $names{'generation'} = $gene; }
3228: if ($email) { $names{'notification'} = $email;
3229: $names{'critnotification'} = $email; }
3230:
3231: my $reply = &put('environment', \%names, $udom,$uname);
3232: if ($reply ne 'ok') { return 'error: '.$reply; }
3233: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
3234: $umode.', '.$first.', '.$middle.', '.
3235: $last.', '.$gene.' by '.
3236: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3237: return 'ok';
3238: }
3239:
3240: # -------------------------------------------------------------- Modify student
3241:
3242: sub modifystudent {
3243: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3244: $end,$start,$forceid,$desiredhome,$email,$type,$cid)=@_;
3245: if (!$cid) {
3246: unless ($cid=$ENV{'request.course.id'}) {
3247: return 'not_in_class';
3248: }
3249: }
3250: # --------------------------------------------------------------- Make the user
3251: my $reply=&modifyuser
3252: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
3253: $desiredhome,$email);
3254: unless ($reply eq 'ok') { return $reply; }
3255: # This will cause &modify_student_enrollment to get the uid from the
3256: # students environment
3257: $uid = undef if (!$forceid);
3258: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
3259: $gene,$usec,$end,$start,$type,$cid);
3260: return $reply;
3261: }
3262:
3263: sub modify_student_enrollment {
3264: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,
3265: $cid) = @_;
3266: my ($cdom,$cnum,$chome);
3267: if (!$cid) {
3268: unless ($cid=$ENV{'request.course.id'}) {
3269: return 'not_in_class';
3270: }
3271: $cdom=$ENV{'course.'.$cid.'.domain'};
3272: $cnum=$ENV{'course.'.$cid.'.num'};
3273: } else {
3274: ($cdom,$cnum)=split(/_/,$cid);
3275: }
3276: $chome=$ENV{'course.'.$cid.'.home'};
3277: if (!$chome) {
3278: $chome=&homeserver($cnum,$cdom);
3279: }
3280: if (!$chome) { return 'unknown_course'; }
3281: # Make sure the user exists
3282: my $uhome=&homeserver($uname,$udom);
3283: if (($uhome eq '') || ($uhome eq 'no_host')) {
3284: return 'error: no such user';
3285: }
3286: # Get student data if we were not given enough information
3287: if (!defined($first) || $first eq '' ||
3288: !defined($last) || $last eq '' ||
3289: !defined($uid) || $uid eq '' ||
3290: !defined($middle) || $middle eq '' ||
3291: !defined($gene) || $gene eq '') {
3292: # They did not supply us with enough data to enroll the student, so
3293: # we need to pick up more information.
3294: my %tmp = &get('environment',
3295: ['firstname','middlename','lastname', 'generation','id']
3296: ,$udom,$uname);
3297:
3298: #foreach (keys(%tmp)) {
3299: # &logthis("key $_ = ".$tmp{$_});
3300: #}
3301: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3302: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3303: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3304: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3305: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3306: }
3307: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
3308: $first,$middle);
3309: my $value=&escape($uname.':'.$udom).'='.
3310: &escape(join(':',$end,$start,$uid,$usec,$fullname,$type));
3311: my $reply=critical('put:'.$cdom.':'.$cnum.':classlist:'.$value,$chome);
3312: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3313: return 'error: '.$reply;
3314: }
3315: # Add student role to user
3316: my $uurl='/'.$cid;
3317: $uurl=~s/\_/\//g;
3318: if ($usec) {
3319: $uurl.='/'.$usec;
3320: }
3321: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3322: }
3323:
3324: # ------------------------------------------------- Write to course preferences
3325:
3326: sub writecoursepref {
3327: my ($courseid,%prefs)=@_;
3328: $courseid=~s/^\///;
3329: $courseid=~s/\_/\//g;
3330: my ($cdomain,$cnum)=split(/\//,$courseid);
3331: my $chome=homeserver($cnum,$cdomain);
3332: if (($chome eq '') || ($chome eq 'no_host')) {
3333: return 'error: no such course';
3334: }
3335: my $cstring='';
3336: foreach (keys %prefs) {
3337: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3338: }
3339: $cstring=~s/\&$//;
3340: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3341: }
3342:
3343: # ---------------------------------------------------------- Make/modify course
3344:
3345: sub createcourse {
3346: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
3347: $url=&declutter($url);
3348: my $cid='';
3349: unless (&allowed('ccc',$udom)) {
3350: return 'refused';
3351: }
3352: # ------------------------------------------------------------------- Create ID
3353: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3354: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3355: # ----------------------------------------------- Make sure that does not exist
3356: my $uhome=&homeserver($uname,$udom,'true');
3357: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3358: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3359: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3360: $uhome=&homeserver($uname,$udom,'true');
3361: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3362: return 'error: unable to generate unique course-ID';
3363: }
3364: }
3365: # ------------------------------------------------ Check supplied server name
3366: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3367: if (! exists($libserv{$course_server})) {
3368: return 'error:bad server name '.$course_server;
3369: }
3370: # ------------------------------------------------------------- Make the course
3371: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3372: $course_server);
3373: unless ($reply eq 'ok') { return 'error: '.$reply; }
3374: $uhome=&homeserver($uname,$udom,'true');
3375: if (($uhome eq '') || ($uhome eq 'no_host')) {
3376: return 'error: no such course';
3377: }
3378: # ----------------------------------------------------------------- Course made
3379: # log existance
3380: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description),
3381: $uhome);
3382: &flushcourselogs();
3383: # set toplevel url
3384: my $topurl=$url;
3385: unless ($nonstandard) {
3386: # ------------------------------------------ For standard courses, make top url
3387: my $mapurl=&clutter($url);
3388: if ($mapurl eq '/res/') { $mapurl=''; }
3389: $ENV{'form.initmap'}=(<<ENDINITMAP);
3390: <map>
3391: <resource id="1" type="start"></resource>
3392: <resource id="2" src="$mapurl"></resource>
3393: <resource id="3" type="finish"></resource>
3394: <link index="1" from="1" to="2"></link>
3395: <link index="2" from="2" to="3"></link>
3396: </map>
3397: ENDINITMAP
3398: $topurl=&declutter(
3399: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3400: );
3401: }
3402: # ----------------------------------------------------------- Write preferences
3403: &writecoursepref($udom.'_'.$uname,
3404: ('description' => $description,
3405: 'url' => $topurl));
3406: return '/'.$udom.'/'.$uname;
3407: }
3408:
3409: # ---------------------------------------------------------- Assign Custom Role
3410:
3411: sub assigncustomrole {
3412: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3413: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3414: $end,$start,$deleteflag);
3415: }
3416:
3417: # ----------------------------------------------------------------- Revoke Role
3418:
3419: sub revokerole {
3420: my ($udom,$uname,$url,$role,$deleteflag)=@_;
3421: my $now=time;
3422: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
3423: }
3424:
3425: # ---------------------------------------------------------- Revoke Custom Role
3426:
3427: sub revokecustomrole {
3428: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
3429: my $now=time;
3430: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3431: $deleteflag);
3432: }
3433:
3434: # ------------------------------------------------------------ Directory lister
3435:
3436: sub dirlist {
3437: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3438:
3439: $uri=~s/^\///;
3440: $uri=~s/\/$//;
3441: my ($udom, $uname);
3442: (undef,$udom,$uname)=split(/\//,$uri);
3443: if(defined($userdomain)) {
3444: $udom = $userdomain;
3445: }
3446: if(defined($username)) {
3447: $uname = $username;
3448: }
3449:
3450: my $dirRoot = $perlvar{'lonDocRoot'};
3451: if(defined($alternateDirectoryRoot)) {
3452: $dirRoot = $alternateDirectoryRoot;
3453: $dirRoot =~ s/\/$//;
3454: }
3455:
3456: if($udom) {
3457: if($uname) {
3458: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
3459: homeserver($uname,$udom));
3460: return split(/:/,$listing);
3461: } elsif(!defined($alternateDirectoryRoot)) {
3462: my $tryserver;
3463: my %allusers=();
3464: foreach $tryserver (keys %libserv) {
3465: if($hostdom{$tryserver} eq $udom) {
3466: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3467: $udom, $tryserver);
3468: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
3469: && ($listing ne 'con_lost')) {
3470: foreach (split(/:/,$listing)) {
3471: my ($entry,@stat)=split(/&/,$_);
3472: $allusers{$entry}=1;
3473: }
3474: }
3475: }
3476: }
3477: my $alluserstr='';
3478: foreach (sort keys %allusers) {
3479: $alluserstr.=$_.'&user:';
3480: }
3481: $alluserstr=~s/:$//;
3482: return split(/:/,$alluserstr);
3483: } else {
3484: my @emptyResults = ();
3485: push(@emptyResults, 'missing user name');
3486: return split(':',@emptyResults);
3487: }
3488: } elsif(!defined($alternateDirectoryRoot)) {
3489: my $tryserver;
3490: my %alldom=();
3491: foreach $tryserver (keys %libserv) {
3492: $alldom{$hostdom{$tryserver}}=1;
3493: }
3494: my $alldomstr='';
3495: foreach (sort keys %alldom) {
3496: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
3497: }
3498: $alldomstr=~s/:$//;
3499: return split(/:/,$alldomstr);
3500: } else {
3501: my @emptyResults = ();
3502: push(@emptyResults, 'missing domain');
3503: return split(':',@emptyResults);
3504: }
3505: }
3506:
3507: # --------------------------------------------- GetFileTimestamp
3508: # This function utilizes dirlist and returns the date stamp for
3509: # when it was last modified. It will also return an error of -1
3510: # if an error occurs
3511:
3512: ##
3513: ## FIXME: This subroutine assumes its caller knows something about the
3514: ## directory structure of the home server for the student ($root).
3515: ## Not a good assumption to make. Since this is for looking up files
3516: ## in user directories, the full path should be constructed by lond, not
3517: ## whatever machine we request data from.
3518: ##
3519: sub GetFileTimestamp {
3520: my ($studentDomain,$studentName,$filename,$root)=@_;
3521: $studentDomain=~s/\W//g;
3522: $studentName=~s/\W//g;
3523: my $subdir=$studentName.'__';
3524: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3525: my $proname="$studentDomain/$subdir/$studentName";
3526: $proname .= '/'.$filename;
3527: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
3528: $studentName, $root);
3529: my @stats = split('&', $fileStat);
3530: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
3531: # @stats contains first the filename, then the stat output
3532: return $stats[10]; # so this is 10 instead of 9.
3533: } else {
3534: return -1;
3535: }
3536: }
3537:
3538: # -------------------------------------------------------- Value of a Condition
3539:
3540: sub directcondval {
3541: my $number=shift;
3542: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
3543: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
3544: } else {
3545: return 2;
3546: }
3547: }
3548:
3549: sub condval {
3550: my $condidx=shift;
3551: my $result=0;
3552: my $allpathcond='';
3553: foreach (split(/\|/,$condidx)) {
3554: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
3555: $allpathcond.=
3556: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
3557: }
3558: }
3559: $allpathcond=~s/\|$//;
3560: if ($ENV{'request.course.id'}) {
3561: if ($allpathcond) {
3562: my $operand='|';
3563: my @stack;
3564: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
3565: if ($_ eq '(') {
3566: push @stack,($operand,$result)
3567: } elsif ($_ eq ')') {
3568: my $before=pop @stack;
3569: if (pop @stack eq '&') {
3570: $result=$result>$before?$before:$result;
3571: } else {
3572: $result=$result>$before?$result:$before;
3573: }
3574: } elsif (($_ eq '&') || ($_ eq '|')) {
3575: $operand=$_;
3576: } else {
3577: my $new=directcondval($_);
3578: if ($operand eq '&') {
3579: $result=$result>$new?$new:$result;
3580: } else {
3581: $result=$result>$new?$result:$new;
3582: }
3583: }
3584: }
3585: }
3586: }
3587: return $result;
3588: }
3589:
3590: # ---------------------------------------------------- Devalidate courseresdata
3591:
3592: sub devalidatecourseresdata {
3593: my ($coursenum,$coursedomain)=@_;
3594: my $hashid=$coursenum.':'.$coursedomain;
3595: &devalidate_cache(\%courseresdatacache,$hashid,'courseres');
3596: }
3597:
3598: # --------------------------------------------------- Course Resourcedata Query
3599:
3600: sub courseresdata {
3601: my ($coursenum,$coursedomain,@which)=@_;
3602: my $coursehom=&homeserver($coursenum,$coursedomain);
3603: my $hashid=$coursenum.':'.$coursedomain;
3604: my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid,'courseres');
3605: unless (defined($cached)) {
3606: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
3607: $result=\%dumpreply;
3608: my ($tmp) = keys(%dumpreply);
3609: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
3610: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
3611: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3612: return $tmp;
3613: } elsif ($tmp =~ /^(error)/) {
3614: $result=undef;
3615: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
3616: }
3617: }
3618: foreach my $item (@which) {
3619: if (defined($result->{$item})) {
3620: return $result->{$item};
3621: }
3622: }
3623: return undef;
3624: }
3625:
3626: #
3627: # EXT resource caching routines
3628: #
3629:
3630: sub clear_EXT_cache_status {
3631: &delenv('cache.EXT.');
3632: }
3633:
3634: sub EXT_cache_status {
3635: my ($target_domain,$target_user) = @_;
3636: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3637: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
3638: # We know already the user has no data
3639: return 1;
3640: } else {
3641: return 0;
3642: }
3643: }
3644:
3645: sub EXT_cache_set {
3646: my ($target_domain,$target_user) = @_;
3647: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3648: &appenv($cachename => time);
3649: }
3650:
3651: # --------------------------------------------------------- Value of a Variable
3652: sub EXT {
3653: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
3654:
3655: unless ($varname) { return ''; }
3656: #get real user name/domain, courseid and symb
3657: my $courseid;
3658: my $publicuser;
3659: if ($symbparm) {
3660: $symbparm=&get_symb_from_alias($symbparm);
3661: }
3662: if (!($uname && $udom)) {
3663: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
3664: &Apache::lonxml::whichuser($symbparm);
3665: if (!$symbparm) { $symbparm=$cursymb; }
3666: } else {
3667: $courseid=$ENV{'request.course.id'};
3668: }
3669: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
3670: my $rest;
3671: if (defined($therest[0])) {
3672: $rest=join('.',@therest);
3673: } else {
3674: $rest='';
3675: }
3676:
3677: my $qualifierrest=$qualifier;
3678: if ($rest) { $qualifierrest.='.'.$rest; }
3679: my $spacequalifierrest=$space;
3680: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
3681: if ($realm eq 'user') {
3682: # --------------------------------------------------------------- user.resource
3683: if ($space eq 'resource') {
3684: if (defined($Apache::lonhomework::parsing_a_problem)) {
3685: return $Apache::lonhomework::history{$qualifierrest};
3686: } else {
3687: my %restored;
3688: if ($publicuser || $ENV{'request.state'} eq 'construct') {
3689: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
3690: } else {
3691: %restored=&restore($symbparm,$courseid,$udom,$uname);
3692: }
3693: return $restored{$qualifierrest};
3694: }
3695: # ----------------------------------------------------------------- user.access
3696: } elsif ($space eq 'access') {
3697: # FIXME - not supporting calls for a specific user
3698: return &allowed($qualifier,$rest);
3699: # ------------------------------------------ user.preferences, user.environment
3700: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
3701: if (($uname eq $ENV{'user.name'}) &&
3702: ($udom eq $ENV{'user.domain'})) {
3703: return $ENV{join('.',('environment',$qualifierrest))};
3704: } else {
3705: my %returnhash;
3706: if (!$publicuser) {
3707: %returnhash=&userenvironment($udom,$uname,
3708: $qualifierrest);
3709: }
3710: return $returnhash{$qualifierrest};
3711: }
3712: # ----------------------------------------------------------------- user.course
3713: } elsif ($space eq 'course') {
3714: # FIXME - not supporting calls for a specific user
3715: return $ENV{join('.',('request.course',$qualifier))};
3716: # ------------------------------------------------------------------- user.role
3717: } elsif ($space eq 'role') {
3718: # FIXME - not supporting calls for a specific user
3719: my ($role,$where)=split(/\./,$ENV{'request.role'});
3720: if ($qualifier eq 'value') {
3721: return $role;
3722: } elsif ($qualifier eq 'extent') {
3723: return $where;
3724: }
3725: # ----------------------------------------------------------------- user.domain
3726: } elsif ($space eq 'domain') {
3727: return $udom;
3728: # ------------------------------------------------------------------- user.name
3729: } elsif ($space eq 'name') {
3730: return $uname;
3731: # ---------------------------------------------------- Any other user namespace
3732: } else {
3733: my %reply;
3734: if (!$publicuser) {
3735: %reply=&get($space,[$qualifierrest],$udom,$uname);
3736: }
3737: return $reply{$qualifierrest};
3738: }
3739: } elsif ($realm eq 'query') {
3740: # ---------------------------------------------- pull stuff out of query string
3741: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
3742: [$spacequalifierrest]);
3743: return $ENV{'form.'.$spacequalifierrest};
3744: } elsif ($realm eq 'request') {
3745: # ------------------------------------------------------------- request.browser
3746: if ($space eq 'browser') {
3747: if ($qualifier eq 'textremote') {
3748: if (&mt('textual_remote_display') eq 'on') {
3749: return 1;
3750: } else {
3751: return 0;
3752: }
3753: } else {
3754: return $ENV{'browser.'.$qualifier};
3755: }
3756: # ------------------------------------------------------------ request.filename
3757: } else {
3758: return $ENV{'request.'.$spacequalifierrest};
3759: }
3760: } elsif ($realm eq 'course') {
3761: # ---------------------------------------------------------- course.description
3762: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
3763: } elsif ($realm eq 'resource') {
3764:
3765: my $section;
3766: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
3767:
3768: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
3769:
3770: # ----------------------------------------------------- Cascading lookup scheme
3771: if (!$symbparm) { $symbparm=&symbread(); }
3772: my $symbp=$symbparm;
3773: my $mapp=(&decode_symb($symbp))[0];
3774:
3775: my $symbparm=$symbp.'.'.$spacequalifierrest;
3776: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3777:
3778: if (($ENV{'user.name'} eq $uname) &&
3779: ($ENV{'user.domain'} eq $udom)) {
3780: $section=$ENV{'request.course.sec'};
3781: } else {
3782: if (! defined($usection)) {
3783: $section=&usection($udom,$uname,$courseid);
3784: } else {
3785: $section = $usection;
3786: }
3787: }
3788:
3789: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3790: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3791: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3792:
3793: my $courselevel=$courseid.'.'.$spacequalifierrest;
3794: my $courselevelr=$courseid.'.'.$symbparm;
3795: my $courselevelm=$courseid.'.'.$mapparm;
3796:
3797: # ----------------------------------------------------------- first, check user
3798: #most student don\'t have any data set, check if there is some data
3799: if (! &EXT_cache_status($udom,$uname)) {
3800: my $hashid="$udom:$uname";
3801: my ($result,$cached)=&is_cached(\%userresdatacache,$hashid,
3802: 'userres');
3803: if (!defined($cached)) {
3804: my %resourcedata=&dump('resourcedata',$udom,$uname);
3805: $result=\%resourcedata;
3806: &do_cache(\%userresdatacache,$hashid,$result,'userres');
3807: }
3808: my ($tmp)=keys(%$result);
3809: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
3810: if ($$result{$courselevelr}) {
3811: return $$result{$courselevelr}; }
3812: if ($$result{$courselevelm}) {
3813: return $$result{$courselevelm}; }
3814: if ($$result{$courselevel}) {
3815: return $$result{$courselevel}; }
3816: } else {
3817: #error 2 occurs when the .db doesn't exist
3818: if ($tmp!~/error: 2 /) {
3819: &logthis("<font color=blue>WARNING:".
3820: " Trying to get resource data for ".
3821: $uname." at ".$udom.": ".
3822: $tmp."</font>");
3823: } elsif ($tmp=~/error: 2 /) {
3824: &EXT_cache_set($udom,$uname);
3825: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3826: return $tmp;
3827: }
3828: }
3829: }
3830:
3831: # -------------------------------------------------------- second, check course
3832:
3833: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3834: $ENV{'course.'.$courseid.'.domain'},
3835: ($seclevelr,$seclevelm,$seclevel,
3836: $courselevelr,$courselevelm,
3837: $courselevel));
3838: if (defined($coursereply)) { return $coursereply; }
3839:
3840: # ------------------------------------------------------ third, check map parms
3841: my %parmhash=();
3842: my $thisparm='';
3843: if (tie(%parmhash,'GDBM_File',
3844: $ENV{'request.course.fn'}.'_parms.db',
3845: &GDBM_READER(),0640)) {
3846: $thisparm=$parmhash{$symbparm};
3847: untie(%parmhash);
3848: }
3849: if ($thisparm) { return $thisparm; }
3850: }
3851: # --------------------------------------------- last, look in resource metadata
3852:
3853: $spacequalifierrest=~s/\./\_/;
3854: my $filename;
3855: if (!$symbparm) { $symbparm=&symbread(); }
3856: if ($symbparm) {
3857: $filename=(&decode_symb($symbparm))[2];
3858: } else {
3859: $filename=$ENV{'request.filename'};
3860: }
3861: my $metadata=&metadata($filename,$spacequalifierrest);
3862: if (defined($metadata)) { return $metadata; }
3863: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
3864: if (defined($metadata)) { return $metadata; }
3865:
3866: # ------------------------------------------------------------------ Cascade up
3867: unless ($space eq '0') {
3868: my @parts=split(/_/,$space);
3869: my $id=pop(@parts);
3870: my $part=join('_',@parts);
3871: if ($part eq '') { $part='0'; }
3872: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
3873: $symbparm,$udom,$uname,$section,1);
3874: if (defined($partgeneral)) { return $partgeneral; }
3875: }
3876: if ($recurse) { return undef; }
3877: my $pack_def=&packages_tab_default($filename,$varname);
3878: if (defined($pack_def)) { return $pack_def; }
3879:
3880: # ---------------------------------------------------- Any other user namespace
3881: } elsif ($realm eq 'environment') {
3882: # ----------------------------------------------------------------- environment
3883: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3884: return $ENV{'environment.'.$spacequalifierrest};
3885: } else {
3886: my %returnhash=&userenvironment($udom,$uname,
3887: $spacequalifierrest);
3888: return $returnhash{$spacequalifierrest};
3889: }
3890: } elsif ($realm eq 'system') {
3891: # ----------------------------------------------------------------- system.time
3892: if ($space eq 'time') {
3893: return time;
3894: }
3895: }
3896: return '';
3897: }
3898:
3899: sub packages_tab_default {
3900: my ($uri,$varname)=@_;
3901: my (undef,$part,$name)=split(/\./,$varname);
3902: my $packages=&metadata($uri,'packages');
3903: foreach my $package (split(/,/,$packages)) {
3904: my ($pack_type,$pack_part)=split(/_/,$package,2);
3905: if (defined($packagetab{"$pack_type&$name&default"})) {
3906: return $packagetab{"$pack_type&$name&default"};
3907: }
3908: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
3909: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
3910: }
3911: }
3912: return undef;
3913: }
3914:
3915: sub add_prefix_and_part {
3916: my ($prefix,$part)=@_;
3917: my $keyroot;
3918: if (defined($prefix) && $prefix !~ /^__/) {
3919: # prefix that has a part already
3920: $keyroot=$prefix;
3921: } elsif (defined($prefix)) {
3922: # prefix that is missing a part
3923: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3924: } else {
3925: # no prefix at all
3926: if (defined($part)) { $keyroot='_'.$part; }
3927: }
3928: return $keyroot;
3929: }
3930:
3931: # ---------------------------------------------------------------- Get metadata
3932:
3933: sub metadata {
3934: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3935: $uri=&declutter($uri);
3936: # if it is a non metadata possible uri return quickly
3937: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3938: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
3939: ($uri =~ m|home/[^/]+/public_html/|) || ($uri =~ m|^uploaded/|)) {
3940: return undef;
3941: }
3942: my $filename=$uri;
3943: $uri=~s/\.meta$//;
3944: #
3945: # Is the metadata already cached?
3946: # Look at timestamp of caching
3947: # Everything is cached by the main uri, libraries are never directly cached
3948: #
3949: if (!defined($liburi)) {
3950: my ($result,$cached)=&is_cached(\%metacache,$uri,'meta');
3951: if (defined($cached)) { return $result->{':'.$what}; }
3952: }
3953: {
3954: #
3955: # Is this a recursive call for a library?
3956: #
3957: if (! exists($metacache{$uri})) {
3958: $metacache{$uri}={};
3959: }
3960: if ($liburi) {
3961: $liburi=&declutter($liburi);
3962: $filename=$liburi;
3963: } else {
3964: &devalidate_cache(\%metacache,$uri,'meta');
3965: }
3966: my %metathesekeys=();
3967: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3968: my $metastring=&getfile(&filelocation('',&clutter($filename)));
3969: my $parser=HTML::LCParser->new(\$metastring);
3970: my $token;
3971: undef %metathesekeys;
3972: while ($token=$parser->get_token) {
3973: if ($token->[0] eq 'S') {
3974: if (defined($token->[2]->{'package'})) {
3975: #
3976: # This is a package - get package info
3977: #
3978: my $package=$token->[2]->{'package'};
3979: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3980: if (defined($token->[2]->{'id'})) {
3981: $keyroot.='_'.$token->[2]->{'id'};
3982: }
3983: if ($metacache{$uri}->{':packages'}) {
3984: $metacache{$uri}->{':packages'}.=','.$package.$keyroot;
3985: } else {
3986: $metacache{$uri}->{':packages'}=$package.$keyroot;
3987: }
3988: foreach (keys %packagetab) {
3989: my $part=$keyroot;
3990: $part=~s/^\_//;
3991: if ($_=~/^\Q$package\E\&/ ||
3992: $_=~/^\Q$package\E_0\&/) {
3993: my ($pack,$name,$subp)=split(/\&/,$_);
3994: # ignore package.tab specified default values
3995: # here &package_tab_default() will fetch those
3996: if ($subp eq 'default') { next; }
3997: my $value=$packagetab{$_};
3998: my $unikey;
3999: if ($pack =~ /_0$/) {
4000: $unikey='parameter_0_'.$name;
4001: $part=0;
4002: } else {
4003: $unikey='parameter'.$keyroot.'_'.$name;
4004: }
4005: if ($subp eq 'display') {
4006: $value.=' [Part: '.$part.']';
4007: }
4008: $metacache{$uri}->{':'.$unikey.'.part'}=$part;
4009: $metathesekeys{$unikey}=1;
4010: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4011: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
4012: }
4013: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4014: $metacache{$uri}->{':'.$unikey}=
4015: $metacache{$uri}->{':'.$unikey.'.default'};
4016: }
4017: }
4018: }
4019: } else {
4020: #
4021: # This is not a package - some other kind of start tag
4022: #
4023: my $entry=$token->[1];
4024: my $unikey;
4025: if ($entry eq 'import') {
4026: $unikey='';
4027: } else {
4028: $unikey=$entry;
4029: }
4030: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4031:
4032: if (defined($token->[2]->{'id'})) {
4033: $unikey.='_'.$token->[2]->{'id'};
4034: }
4035:
4036: if ($entry eq 'import') {
4037: #
4038: # Importing a library here
4039: #
4040: if ($depthcount<20) {
4041: my $location=$parser->get_text('/import');
4042: my $dir=$filename;
4043: $dir=~s|[^/]*$||;
4044: $location=&filelocation($dir,$location);
4045: foreach (sort(split(/\,/,&metadata($uri,'keys',
4046: $location,$unikey,
4047: $depthcount+1)))) {
4048: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
4049: $metathesekeys{$_}=1;
4050: }
4051: }
4052: } else {
4053:
4054: if (defined($token->[2]->{'name'})) {
4055: $unikey.='_'.$token->[2]->{'name'};
4056: }
4057: $metathesekeys{$unikey}=1;
4058: foreach (@{$token->[3]}) {
4059: $metacache{$uri}->{':'.$unikey.'.'.$_}=$token->[2]->{$_};
4060: }
4061: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
4062: my $default=$metacache{$uri}->{':'.$unikey.'.default'};
4063: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
4064: # only ws inside the tag, and not in default, so use default
4065: # as value
4066: $metacache{$uri}->{':'.$unikey}=$default;
4067: } else {
4068: # either something interesting inside the tag or default
4069: # uninteresting
4070: $metacache{$uri}->{':'.$unikey}=$internaltext;
4071: }
4072: # end of not-a-package not-a-library import
4073: }
4074: # end of not-a-package start tag
4075: }
4076: # the next is the end of "start tag"
4077: }
4078: }
4079: # are there custom rights to evaluate
4080: if ($metacache{$uri}->{':copyright'} eq 'custom') {
4081:
4082: #
4083: # Importing a rights file here
4084: #
4085: unless ($depthcount) {
4086: my $location=$metacache{$uri}->{':customdistributionfile'};
4087: my $dir=$filename;
4088: $dir=~s|[^/]*$||;
4089: $location=&filelocation($dir,$location);
4090: foreach (sort(split(/\,/,&metadata($uri,'keys',
4091: $location,'_rights',
4092: $depthcount+1)))) {
4093: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
4094: $metathesekeys{$_}=1;
4095: }
4096: }
4097: }
4098: $metacache{$uri}->{':keys'}=join(',',keys %metathesekeys);
4099: &metadata_generate_part0(\%metathesekeys,$metacache{$uri},$uri);
4100: $metacache{$uri}->{':allpossiblekeys'}=join(',',keys %metathesekeys);
4101: &do_cache(\%metacache,$uri,$metacache{$uri},'meta');
4102: # this is the end of "was not already recently cached
4103: }
4104: return $metacache{$uri}->{':'.$what};
4105: }
4106:
4107: sub metadata_generate_part0 {
4108: my ($metadata,$metacache,$uri) = @_;
4109: my %allnames;
4110: foreach my $metakey (sort keys %$metadata) {
4111: if ($metakey=~/^parameter\_(.*)/) {
4112: my $part=$$metacache{':'.$metakey.'.part'};
4113: my $name=$$metacache{':'.$metakey.'.name'};
4114: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
4115: $allnames{$name}=$part;
4116: }
4117: }
4118: }
4119: foreach my $name (keys(%allnames)) {
4120: $$metadata{"parameter_0_$name"}=1;
4121: my $key=":parameter_0_$name";
4122: $$metacache{"$key.part"}='0';
4123: $$metacache{"$key.name"}=$name;
4124: $$metacache{"$key.type"}=$$metacache{':parameter_'.
4125: $allnames{$name}.'_'.$name.
4126: '.type'};
4127: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
4128: '.display'};
4129: my $expr='\\[Part: '.$allnames{$name}.'\\]';
4130: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
4131: $$metacache{"$key.display"}=$olddis;
4132: }
4133: }
4134:
4135: # ------------------------------------------------- Get the title of a resource
4136:
4137: sub gettitle {
4138: my $urlsymb=shift;
4139: my $symb=&symbread($urlsymb);
4140: unless ($symb) {
4141: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
4142: return &metadata($urlsymb,'title');
4143: }
4144: my ($result,$cached)=&is_cached(\%titlecache,$symb,'title',600);
4145: if (defined($cached)) { return $result; }
4146: my ($map,$resid,$url)=&decode_symb($symb);
4147: my $title='';
4148: my %bighash;
4149: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4150: &GDBM_READER(),0640)) {
4151: my $mapid=$bighash{'map_pc_'.&clutter($map)};
4152: $title=$bighash{'title_'.$mapid.'.'.$resid};
4153: untie %bighash;
4154: }
4155: $title=~s/\&colon\;/\:/gs;
4156: if ($title) {
4157: return &do_cache(\%titlecache,$symb,$title,'title');
4158: } else {
4159: return &metadata($urlsymb,'title');
4160: }
4161: }
4162:
4163: # ------------------------------------------------- Update symbolic store links
4164:
4165: sub symblist {
4166: my ($mapname,%newhash)=@_;
4167: $mapname=&deversion(&declutter($mapname));
4168: my %hash;
4169: if (($ENV{'request.course.fn'}) && (%newhash)) {
4170: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4171: &GDBM_WRCREAT(),0640)) {
4172: foreach (keys %newhash) {
4173: $hash{declutter($_)}=$mapname.'___'.&deversion($newhash{$_});
4174: }
4175: if (untie(%hash)) {
4176: return 'ok';
4177: }
4178: }
4179: }
4180: return 'error';
4181: }
4182:
4183: # --------------------------------------------------------------- Verify a symb
4184:
4185: sub symbverify {
4186: my ($symb,$thisfn)=@_;
4187: $thisfn=&declutter($thisfn);
4188: # direct jump to resource in page or to a sequence - will construct own symbs
4189: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
4190: # check URL part
4191: my ($map,$resid,$url)=&decode_symb($symb);
4192:
4193: unless ($url eq $thisfn) { return 0; }
4194:
4195: $symb=&symbclean($symb);
4196: $thisfn=&deversion($thisfn);
4197:
4198: my %bighash;
4199: my $okay=0;
4200:
4201: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4202: &GDBM_READER(),0640)) {
4203: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4204: unless ($ids) {
4205: $ids=$bighash{'ids_/'.$thisfn};
4206: }
4207: if ($ids) {
4208: # ------------------------------------------------------------------- Has ID(s)
4209: foreach (split(/\,/,$ids)) {
4210: my ($mapid,$resid)=split(/\./,$_);
4211: if (
4212: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
4213: eq $symb) {
4214: $okay=1;
4215: }
4216: }
4217: }
4218: untie(%bighash);
4219: }
4220: return $okay;
4221: }
4222:
4223: # --------------------------------------------------------------- Clean-up symb
4224:
4225: sub symbclean {
4226: my $symb=shift;
4227:
4228: # remove version from map
4229: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
4230:
4231: # remove version from URL
4232: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
4233:
4234: return $symb;
4235: }
4236:
4237: # ---------------------------------------------- Split symb to find map and url
4238:
4239: sub encode_symb {
4240: my ($map,$resid,$url)=@_;
4241: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
4242: }
4243:
4244: sub decode_symb {
4245: my ($map,$resid,$url)=split(/\_\_\_/,shift);
4246: return (&fixversion($map),$resid,&fixversion($url));
4247: }
4248:
4249: sub fixversion {
4250: my $fn=shift;
4251: if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
4252: my %bighash;
4253: my $uri=&clutter($fn);
4254: my $key=$ENV{'request.course.id'}.'_'.$uri;
4255: # is this cached?
4256: my ($result,$cached)=&is_cached(\%courseresversioncache,$key,
4257: 'courseresversion',600);
4258: if (defined($cached)) { return $result; }
4259: # unfortunately not cached, or expired
4260: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4261: &GDBM_READER(),0640)) {
4262: if ($bighash{'version_'.$uri}) {
4263: my $version=$bighash{'version_'.$uri};
4264: unless (($version eq 'mostrecent') ||
4265: ($version==&getversion($uri))) {
4266: $uri=~s/\.(\w+)$/\.$version\.$1/;
4267: }
4268: }
4269: untie %bighash;
4270: }
4271: return &do_cache
4272: (\%courseresversioncache,$key,&declutter($uri),'courseresversion');
4273: }
4274:
4275: sub deversion {
4276: my $url=shift;
4277: $url=~s/\.\d+\.(\w+)$/\.$1/;
4278: return $url;
4279: }
4280:
4281: # ------------------------------------------------------ Return symb list entry
4282:
4283: sub symbread {
4284: my ($thisfn,$donotrecurse)=@_;
4285: # no filename provided? try from environment
4286: unless ($thisfn) {
4287: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
4288: $thisfn=$ENV{'request.filename'};
4289: }
4290: # is that filename actually a symb? Verify, clean, and return
4291: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
4292: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
4293: }
4294: $thisfn=declutter($thisfn);
4295: my %hash;
4296: my %bighash;
4297: my $syval='';
4298: if (($ENV{'request.course.fn'}) && ($thisfn)) {
4299: my $targetfn = $thisfn;
4300: if ( ($thisfn =~ m/^uploaded\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
4301: $targetfn = 'adm/wrapper/'.$thisfn;
4302: }
4303: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4304: &GDBM_READER(),0640)) {
4305: $syval=$hash{$targetfn};
4306: untie(%hash);
4307: }
4308: # ---------------------------------------------------------- There was an entry
4309: if ($syval) {
4310: unless ($syval=~/\_\d+$/) {
4311: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
4312: &appenv('request.ambiguous' => $thisfn);
4313: return '';
4314: }
4315: $syval.=$1;
4316: }
4317: } else {
4318: # ------------------------------------------------------- Was not in symb table
4319: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4320: &GDBM_READER(),0640)) {
4321: # ---------------------------------------------- Get ID(s) for current resource
4322: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4323: unless ($ids) {
4324: $ids=$bighash{'ids_/'.$thisfn};
4325: }
4326: unless ($ids) {
4327: # alias?
4328: $ids=$bighash{'mapalias_'.$thisfn};
4329: }
4330: if ($ids) {
4331: # ------------------------------------------------------------------- Has ID(s)
4332: my @possibilities=split(/\,/,$ids);
4333: if ($#possibilities==0) {
4334: # ----------------------------------------------- There is only one possibility
4335: my ($mapid,$resid)=split(/\./,$ids);
4336: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
4337: } elsif (!$donotrecurse) {
4338: # ------------------------------------------ There is more than one possibility
4339: my $realpossible=0;
4340: foreach (@possibilities) {
4341: my $file=$bighash{'src_'.$_};
4342: if (&allowed('bre',$file)) {
4343: my ($mapid,$resid)=split(/\./,$_);
4344: if ($bighash{'map_type_'.$mapid} ne 'page') {
4345: $realpossible++;
4346: $syval=declutter($bighash{'map_id_'.$mapid}).
4347: '___'.$resid;
4348: }
4349: }
4350: }
4351: if ($realpossible!=1) { $syval=''; }
4352: } else {
4353: $syval='';
4354: }
4355: }
4356: untie(%bighash)
4357: }
4358: }
4359: if ($syval) {
4360: return &symbclean($syval.'___'.$thisfn);
4361: }
4362: }
4363: &appenv('request.ambiguous' => $thisfn);
4364: return '';
4365: }
4366:
4367: # ---------------------------------------------------------- Return random seed
4368:
4369: sub numval {
4370: my $txt=shift;
4371: $txt=~tr/A-J/0-9/;
4372: $txt=~tr/a-j/0-9/;
4373: $txt=~tr/K-T/0-9/;
4374: $txt=~tr/k-t/0-9/;
4375: $txt=~tr/U-Z/0-5/;
4376: $txt=~tr/u-z/0-5/;
4377: $txt=~s/\D//g;
4378: return int($txt);
4379: }
4380:
4381: sub latest_rnd_algorithm_id {
4382: return '64bit2';
4383: }
4384:
4385: sub rndseed {
4386: my ($symb,$courseid,$domain,$username)=@_;
4387:
4388: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
4389: if (!$symb) {
4390: unless ($symb=$wsymb) { return time; }
4391: }
4392: if (!$courseid) { $courseid=$wcourseid; }
4393: if (!$domain) { $domain=$wdomain; }
4394: if (!$username) { $username=$wusername }
4395: my $which=$ENV{"course.$courseid.rndseed"};
4396: my $CODE=$ENV{'scantron.CODE'};
4397: if (defined($CODE)) {
4398: &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
4399: } elsif ($which eq '64bit2') {
4400: return &rndseed_64bit2($symb,$courseid,$domain,$username);
4401: } elsif ($which eq '64bit') {
4402: return &rndseed_64bit($symb,$courseid,$domain,$username);
4403: }
4404: return &rndseed_32bit($symb,$courseid,$domain,$username);
4405: }
4406:
4407: sub rndseed_32bit {
4408: my ($symb,$courseid,$domain,$username)=@_;
4409: {
4410: use integer;
4411: my $symbchck=unpack("%32C*",$symb) << 27;
4412: my $symbseed=numval($symb) << 22;
4413: my $namechck=unpack("%32C*",$username) << 17;
4414: my $nameseed=numval($username) << 12;
4415: my $domainseed=unpack("%32C*",$domain) << 7;
4416: my $courseseed=unpack("%32C*",$courseid);
4417: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
4418: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4419: #&Apache::lonxml::debug("rndseed :$num:$symb");
4420: return $num;
4421: }
4422: }
4423:
4424: sub rndseed_64bit {
4425: my ($symb,$courseid,$domain,$username)=@_;
4426: {
4427: use integer;
4428: my $symbchck=unpack("%32S*",$symb) << 21;
4429: my $symbseed=numval($symb) << 10;
4430: my $namechck=unpack("%32S*",$username);
4431:
4432: my $nameseed=numval($username) << 21;
4433: my $domainseed=unpack("%32S*",$domain) << 10;
4434: my $courseseed=unpack("%32S*",$courseid);
4435:
4436: my $num1=$symbchck+$symbseed+$namechck;
4437: my $num2=$nameseed+$domainseed+$courseseed;
4438: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4439: #&Apache::lonxml::debug("rndseed :$num:$symb");
4440: return "$num1,$num2";
4441: }
4442: }
4443:
4444: sub rndseed_64bit2 {
4445: my ($symb,$courseid,$domain,$username)=@_;
4446: {
4447: use integer;
4448: # strings need to be an even # of cahracters long, it it is odd the
4449: # last characters gets thrown away
4450: my $symbchck=unpack("%32S*",$symb.' ') << 21;
4451: my $symbseed=numval($symb) << 10;
4452: my $namechck=unpack("%32S*",$username.' ');
4453:
4454: my $nameseed=numval($username) << 21;
4455: my $domainseed=unpack("%32S*",$domain.' ') << 10;
4456: my $courseseed=unpack("%32S*",$courseid.' ');
4457:
4458: my $num1=$symbchck+$symbseed+$namechck;
4459: my $num2=$nameseed+$domainseed+$courseseed;
4460: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4461: #&Apache::lonxml::debug("rndseed :$num:$symb");
4462: return "$num1,$num2";
4463: }
4464: }
4465:
4466: sub rndseed_CODE_64bit {
4467: my ($symb,$courseid,$domain,$username)=@_;
4468: {
4469: use integer;
4470: my $symbchck=unpack("%32S*",$symb.' ') << 16;
4471: my $symbseed=numval($symb);
4472: my $CODEseed=numval($ENV{'scantron.CODE'}) << 16;
4473: my $courseseed=unpack("%32S*",$courseid.' ');
4474: my $num1=$symbseed+$CODEseed;
4475: my $num2=$courseseed+$symbchck;
4476: #&Apache::lonxml::debug("$symbseed:$CODEseed|$courseseed:$symbchck");
4477: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
4478: return "$num1,$num2";
4479: }
4480: }
4481:
4482: sub setup_random_from_rndseed {
4483: my ($rndseed)=@_;
4484: if ($rndseed =~/,/) {
4485: my ($num1,$num2)=split(/,/,$rndseed);
4486: &Math::Random::random_set_seed(abs($num1),abs($num2));
4487: } else {
4488: &Math::Random::random_set_seed_from_phrase($rndseed);
4489: }
4490: }
4491:
4492: sub latest_receipt_algorithm_id {
4493: return 'receipt2';
4494: }
4495:
4496: sub recunique {
4497: my $fucourseid=shift;
4498: my $unique;
4499: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
4500: $unique=$ENV{"course.$fucourseid.internal.encseed"};
4501: } else {
4502: $unique=$perlvar{'lonReceipt'};
4503: }
4504: return unpack("%32C*",$unique);
4505: }
4506:
4507: sub recprefix {
4508: my $fucourseid=shift;
4509: my $prefix;
4510: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
4511: $prefix=$ENV{"course.$fucourseid.internal.encpref"};
4512: } else {
4513: $prefix=$perlvar{'lonHostID'};
4514: }
4515: return unpack("%32C*",$prefix);
4516: }
4517:
4518: sub ireceipt {
4519: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
4520: my $cuname=unpack("%32C*",$funame);
4521: my $cudom=unpack("%32C*",$fudom);
4522: my $cucourseid=unpack("%32C*",$fucourseid);
4523: my $cusymb=unpack("%32C*",$fusymb);
4524: my $cunique=&recunique($fucourseid);
4525: my $cpart=unpack("%32S*",$part);
4526: my $return =&recprefix($fucourseid).'-';
4527: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
4528: $ENV{'request.state'} eq 'construct') {
4529: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
4530: " and ".($cpart%$cudom));
4531:
4532: $return.= ($cunique%$cuname+
4533: $cunique%$cudom+
4534: $cusymb%$cuname+
4535: $cusymb%$cudom+
4536: $cucourseid%$cuname+
4537: $cucourseid%$cudom+
4538: $cpart%$cuname+
4539: $cpart%$cudom);
4540: } else {
4541: $return.= ($cunique%$cuname+
4542: $cunique%$cudom+
4543: $cusymb%$cuname+
4544: $cusymb%$cudom+
4545: $cucourseid%$cuname+
4546: $cucourseid%$cudom);
4547: }
4548: return $return;
4549: }
4550:
4551: sub receipt {
4552: my ($part)=@_;
4553: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
4554: return &ireceipt($name,$domain,$courseid,$symb,$part);
4555: }
4556:
4557: # ------------------------------------------------------------ Serves up a file
4558: # returns either the contents of the file or
4559: # -1 if the file doesn't exist
4560: #
4561: # if the target is a file that was uploaded via DOCS,
4562: # a check will be made to see if a current copy exists on the local server,
4563: # if it does this will be served, otherwise a copy will be retrieved from
4564: # the home server for the course and stored in /home/httpd/html/userfiles on
4565: # the local server.
4566:
4567: sub getfile {
4568: my ($file,$caller) = @_;
4569:
4570: if ($file !~ m|^/*uploaded/(\w+)/(\w+)/(.+)$|) {
4571: # normal file from res space
4572: &repcopy($file);
4573: return &readfile($file);
4574: }
4575:
4576: my $info;
4577: my $cdom = $1;
4578: my $cnum = $2;
4579: my $filename = $3;
4580: my $path = $Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles';
4581: my ($lwpresp,$rtncode);
4582: my $localfile = $path.'/'.$cdom.'/'.$cnum.'/'.$filename;
4583: if (-e "$localfile") {
4584: my @fileinfo = stat($localfile);
4585: $lwpresp = &getuploaded('HEAD',$file,$cdom,$cnum,\$info,\$rtncode);
4586: if ($lwpresp ne 'ok') {
4587: if ($rtncode eq '404') {
4588: unlink($localfile);
4589: }
4590: return -1;
4591: }
4592: if ($info < $fileinfo[9]) {
4593: return &readfile($localfile);
4594: }
4595: $info = '';
4596: $lwpresp = &getuploaded('GET',$file,$cdom,$cnum,\$info,\$rtncode);
4597: if ($lwpresp ne 'ok') {
4598: return -1;
4599: }
4600: } else {
4601: $lwpresp = &getuploaded('GET',$file,$cdom,$cnum,\$info,\$rtncode);
4602: if ($lwpresp ne 'ok') {
4603: return -1;
4604: }
4605: my @parts = ($cdom,$cnum);
4606: if ($filename =~ m|^(.+)/[^/]+$|) {
4607: push @parts, split(/\//,$1);
4608: }
4609: foreach my $part (@parts) {
4610: $path .= '/'.$part;
4611: if (!-e $path) {
4612: mkdir($path,0770);
4613: }
4614: }
4615: }
4616: open (FILE,">$localfile");
4617: print FILE $info;
4618: close(FILE);
4619: if ($caller eq 'uploadrep') {
4620: return 'ok';
4621: }
4622: return $info;
4623: }
4624:
4625: sub getuploaded {
4626: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
4627: $uri=~s/^\///;
4628: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
4629: my $ua=new LWP::UserAgent;
4630: my $request=new HTTP::Request($reqtype,$uri);
4631: my $response=$ua->request($request);
4632: $$rtncode = $response->code;
4633: if (! $response->is_success()) {
4634: return 'failed';
4635: }
4636: if ($reqtype eq 'HEAD') {
4637: $$info = &Date::Parse::str2time( $response->header('Last-modified') );
4638: } elsif ($reqtype eq 'GET') {
4639: $$info = $response->content;
4640: }
4641: return 'ok';
4642: }
4643:
4644: sub readfile {
4645: my $file = shift;
4646: if ( (! -e $file ) || ($file eq '') ) { return -1; };
4647: my $fh;
4648: open($fh,"<$file");
4649: my $a='';
4650: while (<$fh>) { $a .=$_; }
4651: return $a;
4652: }
4653:
4654: sub filelocation {
4655: my ($dir,$file) = @_;
4656: my $location;
4657: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
4658: if ($file=~m:^/~:) { # is a contruction space reference
4659: $location = $file;
4660: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
4661: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
4662: $location=$file;
4663: } else {
4664: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
4665: $file=~s:^/res/:/:;
4666: if ( !( $file =~ m:^/:) ) {
4667: $location = $dir. '/'.$file;
4668: } else {
4669: $location = '/home/httpd/html/res'.$file;
4670: }
4671: }
4672: $location=~s://+:/:g; # remove duplicate /
4673: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
4674: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
4675: return $location;
4676: }
4677:
4678: sub hreflocation {
4679: my ($dir,$file)=@_;
4680: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
4681: my $finalpath=filelocation($dir,$file);
4682: $finalpath=~s-^/home/httpd/html--;
4683: $finalpath=~s-^/home/(\w+)/public_html/-/~$1/-;
4684: return $finalpath;
4685: } elsif ($file=~m-^/home-) {
4686: $file=~s-^/home/httpd/html--;
4687: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
4688: return $file;
4689: }
4690: return $file;
4691: }
4692:
4693: sub current_machine_domains {
4694: my $hostname=$hostname{$perlvar{'lonHostID'}};
4695: my @domains;
4696: while( my($id, $name) = each(%hostname)) {
4697: # &logthis("-$id-$name-$hostname-");
4698: if ($hostname eq $name) {
4699: push(@domains,$hostdom{$id});
4700: }
4701: }
4702: return @domains;
4703: }
4704:
4705: sub current_machine_ids {
4706: my $hostname=$hostname{$perlvar{'lonHostID'}};
4707: my @ids;
4708: while( my($id, $name) = each(%hostname)) {
4709: # &logthis("-$id-$name-$hostname-");
4710: if ($hostname eq $name) {
4711: push(@ids,$id);
4712: }
4713: }
4714: return @ids;
4715: }
4716:
4717: # ------------------------------------------------------------- Declutters URLs
4718:
4719: sub declutter {
4720: my $thisfn=shift;
4721: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
4722: $thisfn=~s/^\///;
4723: $thisfn=~s/^res\///;
4724: $thisfn=~s/\?.+$//;
4725: return $thisfn;
4726: }
4727:
4728: # ------------------------------------------------------------- Clutter up URLs
4729:
4730: sub clutter {
4731: my $thisfn='/'.&declutter(shift);
4732: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
4733: $thisfn='/res'.$thisfn;
4734: }
4735: return $thisfn;
4736: }
4737:
4738: # -------------------------------------------------------- Escape Special Chars
4739:
4740: sub escape {
4741: my $str=shift;
4742: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
4743: return $str;
4744: }
4745:
4746: # ----------------------------------------------------- Un-Escape Special Chars
4747:
4748: sub unescape {
4749: my $str=shift;
4750: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
4751: return $str;
4752: }
4753:
4754: sub mod_perl_version {
4755: if (defined($perlvar{'MODPERL2'})) {
4756: return 2;
4757: }
4758: return 1;
4759: }
4760:
4761: sub correct_line_ends {
4762: my ($result)=@_;
4763: $$result =~s/\r\n/\n/mg;
4764: $$result =~s/\r/\n/mg;
4765: }
4766: # ================================================================ Main Program
4767:
4768: sub goodbye {
4769: &logthis("Starting Shut down");
4770: #not converted to using infrastruture and probably shouldn't be
4771: &logthis(sprintf("%-20s is %s",'%badServerCache',scalar(%badServerCache)));
4772: #converted
4773: &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
4774: &logthis(sprintf("%-20s is %s",'%homecache',scalar(%homecache)));
4775: &logthis(sprintf("%-20s is %s",'%titlecache',scalar(%titlecache)));
4776: &logthis(sprintf("%-20s is %s",'%courseresdatacache',scalar(%courseresdatacache)));
4777: #1.1 only
4778: &logthis(sprintf("%-20s is %s",'%userresdatacache',scalar(%userresdatacache)));
4779: &logthis(sprintf("%-20s is %s",'%usectioncache',scalar(%usectioncache)));
4780: &logthis(sprintf("%-20s is %s",'%courseresversioncache',scalar(%courseresversioncache)));
4781: &logthis(sprintf("%-20s is %s",'%resversioncache',scalar(%resversioncache)));
4782: &flushcourselogs();
4783: &logthis("Shutting down");
4784: return DONE;
4785: }
4786:
4787: BEGIN {
4788: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
4789: unless ($readit) {
4790: {
4791: open(my $config,"</etc/httpd/conf/loncapa.conf");
4792:
4793: while (my $configline=<$config>) {
4794: if ($configline =~ /^[^\#]*PerlSetVar/) {
4795: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
4796: chomp($varvalue);
4797: $perlvar{$varname}=$varvalue;
4798: }
4799: }
4800: close($config);
4801: }
4802: {
4803: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
4804:
4805: while (my $configline=<$config>) {
4806: if ($configline =~ /^[^\#]*PerlSetVar/) {
4807: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
4808: chomp($varvalue);
4809: $perlvar{$varname}=$varvalue;
4810: }
4811: }
4812: close($config);
4813: }
4814:
4815: # ------------------------------------------------------------ Read domain file
4816: {
4817: %domaindescription = ();
4818: %domain_auth_def = ();
4819: %domain_auth_arg_def = ();
4820: my $fh;
4821: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
4822: while (<$fh>) {
4823: next if (/^(\#|\s*$)/);
4824: # next if /^\#/;
4825: chomp;
4826: my ($domain, $domain_description, $def_auth, $def_auth_arg,
4827: $def_lang, $city, $longi, $lati) = split(/:/,$_);
4828: $domain_auth_def{$domain}=$def_auth;
4829: $domain_auth_arg_def{$domain}=$def_auth_arg;
4830: $domaindescription{$domain}=$domain_description;
4831: $domain_lang_def{$domain}=$def_lang;
4832: $domain_city{$domain}=$city;
4833: $domain_longi{$domain}=$longi;
4834: $domain_lati{$domain}=$lati;
4835:
4836: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
4837: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
4838: }
4839: }
4840: close ($fh);
4841: }
4842:
4843:
4844: # ------------------------------------------------------------- Read hosts file
4845: {
4846: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
4847:
4848: while (my $configline=<$config>) {
4849: next if ($configline =~ /^(\#|\s*$)/);
4850: chomp($configline);
4851: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
4852: if ($id && $domain && $role && $name && $ip) {
4853: $hostname{$id}=$name;
4854: $hostdom{$id}=$domain;
4855: $hostip{$id}=$ip;
4856: $iphost{$ip}=$id;
4857: if ($role eq 'library') { $libserv{$id}=$name; }
4858: } else {
4859: if ($configline) {
4860: &logthis("Skipping hosts.tab line -$configline-");
4861: }
4862: }
4863: }
4864: close($config);
4865: }
4866:
4867: # ------------------------------------------------------ Read spare server file
4868: {
4869: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
4870:
4871: while (my $configline=<$config>) {
4872: chomp($configline);
4873: if ($configline) {
4874: $spareid{$configline}=1;
4875: }
4876: }
4877: close($config);
4878: }
4879: # ------------------------------------------------------------ Read permissions
4880: {
4881: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
4882:
4883: while (my $configline=<$config>) {
4884: chomp($configline);
4885: if ($configline) {
4886: my ($role,$perm)=split(/ /,$configline);
4887: if ($perm ne '') { $pr{$role}=$perm; }
4888: }
4889: }
4890: close($config);
4891: }
4892:
4893: # -------------------------------------------- Read plain texts for permissions
4894: {
4895: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
4896:
4897: while (my $configline=<$config>) {
4898: chomp($configline);
4899: if ($configline) {
4900: my ($short,$plain)=split(/:/,$configline);
4901: if ($plain ne '') { $prp{$short}=$plain; }
4902: }
4903: }
4904: close($config);
4905: }
4906:
4907: # ---------------------------------------------------------- Read package table
4908: {
4909: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
4910:
4911: while (my $configline=<$config>) {
4912: chomp($configline);
4913: my ($short,$plain)=split(/:/,$configline);
4914: my ($pack,$name)=split(/\&/,$short);
4915: if ($plain ne '') {
4916: $packagetab{$pack.'&'.$name.'&name'}=$name;
4917: $packagetab{$short}=$plain;
4918: }
4919: }
4920: close($config);
4921: }
4922:
4923: # ------------- set up temporary directory
4924: {
4925: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
4926:
4927: }
4928:
4929: %metacache=();
4930:
4931: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
4932: $dumpcount=0;
4933:
4934: &logtouch();
4935: &logthis('<font color=yellow>INFO: Read configuration</font>');
4936: $readit=1;
4937: }
4938: }
4939:
4940: 1;
4941: __END__
4942:
4943: =pod
4944:
4945: =head1 NAME
4946:
4947: Apache::lonnet - Subroutines to ask questions about things in the network.
4948:
4949: =head1 SYNOPSIS
4950:
4951: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
4952:
4953: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
4954:
4955: Common parameters:
4956:
4957: =over 4
4958:
4959: =item *
4960:
4961: $uname : an internal username (if $cname expecting a course Id specifically)
4962:
4963: =item *
4964:
4965: $udom : a domain (if $cdom expecting a course's domain specifically)
4966:
4967: =item *
4968:
4969: $symb : a resource instance identifier
4970:
4971: =item *
4972:
4973: $namespace : the name of a .db file that contains the data needed or
4974: being set.
4975:
4976: =back
4977:
4978: =head1 OVERVIEW
4979:
4980: lonnet provides subroutines which interact with the
4981: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
4982: about classes, users, and resources.
4983:
4984: For many of these objects you can also use this to store data about
4985: them or modify them in various ways.
4986:
4987: =head2 Symbs
4988:
4989: To identify a specific instance of a resource, LON-CAPA uses symbols
4990: or "symbs"X<symb>. These identifiers are built from the URL of the
4991: map, the resource number of the resource in the map, and the URL of
4992: the resource itself. The latter is somewhat redundant, but might help
4993: if maps change.
4994:
4995: An example is
4996:
4997: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
4998:
4999: The respective map entry is
5000:
5001: <resource id="19" src="/res/msu/korte/tests/part12.problem"
5002: title="Problem 2">
5003: </resource>
5004:
5005: Symbs are used by the random number generator, as well as to store and
5006: restore data specific to a certain instance of for example a problem.
5007:
5008: =head2 Storing And Retrieving Data
5009:
5010: X<store()>X<cstore()>X<restore()>Three of the most important functions
5011: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
5012: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
5013: is is the non-critical message twin of cstore. These functions are for
5014: handlers to store a perl hash to a user's permanent data space in an
5015: easy manner, and to retrieve it again on another call. It is expected
5016: that a handler would use this once at the beginning to retrieve data,
5017: and then again once at the end to send only the new data back.
5018:
5019: The data is stored in the user's data directory on the user's
5020: homeserver under the ID of the course.
5021:
5022: The hash that is returned by restore will have all of the previous
5023: value for all of the elements of the hash.
5024:
5025: Example:
5026:
5027: #creating a hash
5028: my %hash;
5029: $hash{'foo'}='bar';
5030:
5031: #storing it
5032: &Apache::lonnet::cstore(\%hash);
5033:
5034: #changing a value
5035: $hash{'foo'}='notbar';
5036:
5037: #adding a new value
5038: $hash{'bar'}='foo';
5039: &Apache::lonnet::cstore(\%hash);
5040:
5041: #retrieving the hash
5042: my %history=&Apache::lonnet::restore();
5043:
5044: #print the hash
5045: foreach my $key (sort(keys(%history))) {
5046: print("\%history{$key} = $history{$key}");
5047: }
5048:
5049: Will print out:
5050:
5051: %history{1:foo} = bar
5052: %history{1:keys} = foo:timestamp
5053: %history{1:timestamp} = 990455579
5054: %history{2:bar} = foo
5055: %history{2:foo} = notbar
5056: %history{2:keys} = foo:bar:timestamp
5057: %history{2:timestamp} = 990455580
5058: %history{bar} = foo
5059: %history{foo} = notbar
5060: %history{timestamp} = 990455580
5061: %history{version} = 2
5062:
5063: Note that the special hash entries C<keys>, C<version> and
5064: C<timestamp> were added to the hash. C<version> will be equal to the
5065: total number of versions of the data that have been stored. The
5066: C<timestamp> attribute will be the UNIX time the hash was
5067: stored. C<keys> is available in every historical section to list which
5068: keys were added or changed at a specific historical revision of a
5069: hash.
5070:
5071: B<Warning>: do not store the hash that restore returns directly. This
5072: will cause a mess since it will restore the historical keys as if the
5073: were new keys. I.E. 1:foo will become 1:1:foo etc.
5074:
5075: Calling convention:
5076:
5077: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
5078: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
5079:
5080: For more detailed information, see lonnet specific documentation.
5081:
5082: =head1 RETURN MESSAGES
5083:
5084: =over 4
5085:
5086: =item * B<con_lost>: unable to contact remote host
5087:
5088: =item * B<con_delayed>: unable to contact remote host, message will be delivered
5089: when the connection is brought back up
5090:
5091: =item * B<con_failed>: unable to contact remote host and unable to save message
5092: for later delivery
5093:
5094: =item * B<error:>: an error a occured, a description of the error follows the :
5095:
5096: =item * B<no_such_host>: unable to fund a host associated with the user/domain
5097: that was requested
5098:
5099: =back
5100:
5101: =head1 PUBLIC SUBROUTINES
5102:
5103: =head2 Session Environment Functions
5104:
5105: =over 4
5106:
5107: =item *
5108: X<appenv()>
5109: B<appenv(%hash)>: the value of %hash is written to
5110: the user envirnoment file, and will be restored for each access this
5111: user makes during this session, also modifies the %ENV for the current
5112: process
5113:
5114: =item *
5115: X<delenv()>
5116: B<delenv($regexp)>: removes all items from the session
5117: environment file that matches the regular expression in $regexp. The
5118: values are also delted from the current processes %ENV.
5119:
5120: =back
5121:
5122: =head2 User Information
5123:
5124: =over 4
5125:
5126: =item *
5127: X<queryauthenticate()>
5128: B<queryauthenticate($uname,$udom)>: try to determine user's current
5129: authentication scheme
5130:
5131: =item *
5132: X<authenticate()>
5133: B<authenticate($uname,$upass,$udom)>: try to
5134: authenticate user from domain's lib servers (first use the current
5135: one). C<$upass> should be the users password.
5136:
5137: =item *
5138: X<homeserver()>
5139: B<homeserver($uname,$udom)>: find the server which has
5140: the user's directory and files (there must be only one), this caches
5141: the answer, and also caches if there is a borken connection.
5142:
5143: =item *
5144: X<idget()>
5145: B<idget($udom,@ids)>: find the usernames behind a list of IDs
5146: (IDs are a unique resource in a domain, there must be only 1 ID per
5147: username, and only 1 username per ID in a specific domain) (returns
5148: hash: id=>name,id=>name)
5149:
5150: =item *
5151: X<idrget()>
5152: B<idrget($udom,@unames)>: find the IDs behind a list of
5153: usernames (returns hash: name=>id,name=>id)
5154:
5155: =item *
5156: X<idput()>
5157: B<idput($udom,%ids)>: store away a list of names and associated IDs
5158:
5159: =item *
5160: X<rolesinit()>
5161: B<rolesinit($udom,$username,$authhost)>: get user privileges
5162:
5163: =item *
5164: X<usection()>
5165: B<usection($udom,$uname,$cname)>: finds the section of student in the
5166: course $cname, return section name/number or '' for "not in course"
5167: and '-1' for "no section"
5168:
5169: =item *
5170: X<userenvironment()>
5171: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
5172: passed in @what from the requested user's environment, returns a hash
5173:
5174: =back
5175:
5176: =head2 User Roles
5177:
5178: =over 4
5179:
5180: =item *
5181:
5182: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
5183: actions
5184: F: full access
5185: U,I,K: authentication modes (cxx only)
5186: '': forbidden
5187: 1: user needs to choose course
5188: 2: browse allowed
5189:
5190: =item *
5191:
5192: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
5193: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
5194: and course level
5195:
5196: =item *
5197:
5198: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
5199: explanation of a user role term
5200:
5201: =back
5202:
5203: =head2 User Modification
5204:
5205: =over 4
5206:
5207: =item *
5208:
5209: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
5210: user for the level given by URL. Optional start and end dates (leave empty
5211: string or zero for "no date")
5212:
5213: =item *
5214:
5215: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
5216: change a users, password, possible return values are: ok,
5217: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
5218: refused
5219:
5220: =item *
5221:
5222: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
5223:
5224: =item *
5225:
5226: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
5227: modify user
5228:
5229: =item *
5230:
5231: modifystudent
5232:
5233: modify a students enrollment and identification information.
5234: The course id is resolved based on the current users environment.
5235: This means the envoking user must be a course coordinator or otherwise
5236: associated with a course.
5237:
5238: This call is essentially a wrapper for lonnet::modifyuser and
5239: lonnet::modify_student_enrollment
5240:
5241: Inputs:
5242:
5243: =over 4
5244:
5245: =item B<$udom> Students loncapa domain
5246:
5247: =item B<$uname> Students loncapa login name
5248:
5249: =item B<$uid> Students id/student number
5250:
5251: =item B<$umode> Students authentication mode
5252:
5253: =item B<$upass> Students password
5254:
5255: =item B<$first> Students first name
5256:
5257: =item B<$middle> Students middle name
5258:
5259: =item B<$last> Students last name
5260:
5261: =item B<$gene> Students generation
5262:
5263: =item B<$usec> Students section in course
5264:
5265: =item B<$end> Unix time of the roles expiration
5266:
5267: =item B<$start> Unix time of the roles start date
5268:
5269: =item B<$forceid> If defined, allow $uid to be changed
5270:
5271: =item B<$desiredhome> server to use as home server for student
5272:
5273: =back
5274:
5275: =item *
5276:
5277: modify_student_enrollment
5278:
5279: Change a students enrollment status in a class. The environment variable
5280: 'role.request.course' must be defined for this function to proceed.
5281:
5282: Inputs:
5283:
5284: =over 4
5285:
5286: =item $udom, students domain
5287:
5288: =item $uname, students name
5289:
5290: =item $uid, students user id
5291:
5292: =item $first, students first name
5293:
5294: =item $middle
5295:
5296: =item $last
5297:
5298: =item $gene
5299:
5300: =item $usec
5301:
5302: =item $end
5303:
5304: =item $start
5305:
5306: =back
5307:
5308:
5309: =item *
5310:
5311: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
5312: custom role; give a custom role to a user for the level given by URL. Specify
5313: name and domain of role author, and role name
5314:
5315: =item *
5316:
5317: revokerole($udom,$uname,$url,$role) : revoke a role for url
5318:
5319: =item *
5320:
5321: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
5322:
5323: =back
5324:
5325: =head2 Course Infomation
5326:
5327: =over 4
5328:
5329: =item *
5330:
5331: coursedescription($courseid) : course description
5332:
5333: =item *
5334:
5335: courseresdata($coursenum,$coursedomain,@which) : request for current
5336: parameter setting for a specific course, @what should be a list of
5337: parameters to ask about. This routine caches answers for 5 minutes.
5338:
5339: =back
5340:
5341: =head2 Course Modification
5342:
5343: =over 4
5344:
5345: =item *
5346:
5347: writecoursepref($courseid,%prefs) : write preferences (environment
5348: database) for a course
5349:
5350: =item *
5351:
5352: createcourse($udom,$description,$url) : make/modify course
5353:
5354: =back
5355:
5356: =head2 Resource Subroutines
5357:
5358: =over 4
5359:
5360: =item *
5361:
5362: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
5363:
5364: =item *
5365:
5366: repcopy($filename) : subscribes to the requested file, and attempts to
5367: replicate from the owning library server, Might return
5368: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
5369: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
5370: resource. Expects the local filesystem pathname
5371: (/home/httpd/html/res/....)
5372:
5373: =back
5374:
5375: =head2 Resource Information
5376:
5377: =over 4
5378:
5379: =item *
5380:
5381: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
5382: a vairety of different possible values, $varname should be a request
5383: string, and the other parameters can be used to specify who and what
5384: one is asking about.
5385:
5386: Possible values for $varname are environment.lastname (or other item
5387: from the envirnment hash), user.name (or someother aspect about the
5388: user), resource.0.maxtries (or some other part and parameter of a
5389: resource)
5390:
5391: =item *
5392:
5393: directcondval($number) : get current value of a condition; reads from a state
5394: string
5395:
5396: =item *
5397:
5398: condval($condidx) : value of condition index based on state
5399:
5400: =item *
5401:
5402: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
5403: resource's metadata, $what should be either a specific key, or either
5404: 'keys' (to get a list of possible keys) or 'packages' to get a list of
5405: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
5406:
5407: this function automatically caches all requests
5408:
5409: =item *
5410:
5411: metadata_query($query,$custom,$customshow) : make a metadata query against the
5412: network of library servers; returns file handle of where SQL and regex results
5413: will be stored for query
5414:
5415: =item *
5416:
5417: symbread($filename) : return symbolic list entry (filename argument optional);
5418: returns the data handle
5419:
5420: =item *
5421:
5422: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
5423: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
5424: failure, user must be in a course, as it assumes the existance of the
5425: course initi hash, and uses $ENV('request.course.id'}
5426:
5427:
5428: =item *
5429:
5430: symbclean($symb) : removes versions numbers from a symb, returns the
5431: cleaned symb
5432:
5433: =item *
5434:
5435: is_on_map($uri) : checks if the $uri is somewhere on the current
5436: course map, user must be in a course for it to work.
5437:
5438: =item *
5439:
5440: numval($salt) : return random seed value (addend for rndseed)
5441:
5442: =item *
5443:
5444: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
5445: a random seed, all arguments are optional, if they aren't sent it uses the
5446: environment to derive them. Note: if symb isn't sent and it can't get one
5447: from &symbread it will use the current time as its return value
5448:
5449: =item *
5450:
5451: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
5452: unfakeable, receipt
5453:
5454: =item *
5455:
5456: receipt() : API to ireceipt working off of ENV values; given out to users
5457:
5458: =item *
5459:
5460: countacc($url) : count the number of accesses to a given URL
5461:
5462: =item *
5463:
5464: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
5465:
5466: =item *
5467:
5468: checkin($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 $tcrsid)
5469:
5470: =item *
5471:
5472: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
5473:
5474: =item *
5475:
5476: devalidate($symb) : devalidate temporary spreadsheet calculations,
5477: forcing spreadsheet to reevaluate the resource scores next time.
5478:
5479: =back
5480:
5481: =head2 Storing/Retreiving Data
5482:
5483: =over 4
5484:
5485: =item *
5486:
5487: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
5488: for this url; hashref needs to be given and should be a \%hashname; the
5489: remaining args aren't required and if they aren't passed or are '' they will
5490: be derived from the ENV
5491:
5492: =item *
5493:
5494: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
5495: uses critical subroutine
5496:
5497: =item *
5498:
5499: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
5500: all args are optional
5501:
5502: =item *
5503:
5504: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
5505: works very similar to store/cstore, but all data is stored in a
5506: temporary location and can be reset using tmpreset, $storehash should
5507: be a hash reference, returns nothing on success
5508:
5509: =item *
5510:
5511: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
5512: similar to restore, but all data is stored in a temporary location and
5513: can be reset using tmpreset. Returns a hash of values on success,
5514: error string otherwise.
5515:
5516: =item *
5517:
5518: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
5519: deltes all keys for $symb form the temporary storage hash.
5520:
5521: =item *
5522:
5523: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5524: reference filled in from namesp ($udom and $uname are optional)
5525:
5526: =item *
5527:
5528: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
5529: namesp ($udom and $uname are optional)
5530:
5531: =item *
5532:
5533: dump($namespace,$udom,$uname,$regexp) :
5534: dumps the complete (or key matching regexp) namespace into a hash
5535: ($udom, $uname and $regexp are optional)
5536:
5537: =item *
5538:
5539: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
5540: $store can be a scalar, an array reference, or if the amount to be
5541: incremented is > 1, a hash reference.
5542:
5543: ($udom and $uname are optional)
5544:
5545: =item *
5546:
5547: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
5548: ($udom and $uname are optional)
5549:
5550: =item *
5551:
5552: cput($namespace,$storehash,$udom,$uname) : critical put
5553: ($udom and $uname are optional)
5554:
5555: =item *
5556:
5557: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5558: reference filled in from namesp (encrypts the return communication)
5559: ($udom and $uname are optional)
5560:
5561: =item *
5562:
5563: log($udom,$name,$home,$message) : write to permanent log for user; use
5564: critical subroutine
5565:
5566: =back
5567:
5568: =head2 Network Status Functions
5569:
5570: =over 4
5571:
5572: =item *
5573:
5574: dirlist($uri) : return directory list based on URI
5575:
5576: =item *
5577:
5578: spareserver() : find server with least workload from spare.tab
5579:
5580: =back
5581:
5582: =head2 Apache Request
5583:
5584: =over 4
5585:
5586: =item *
5587:
5588: ssi($url,%hash) : server side include, does a complete request cycle on url to
5589: localhost, posts hash
5590:
5591: =back
5592:
5593: =head2 Data to String to Data
5594:
5595: =over 4
5596:
5597: =item *
5598:
5599: hash2str(%hash) : convert a hash into a string complete with escaping and '='
5600: and '&' separators, supports elements that are arrayrefs and hashrefs
5601:
5602: =item *
5603:
5604: hashref2str($hashref) : convert a hashref into a string complete with
5605: escaping and '=' and '&' separators, supports elements that are
5606: arrayrefs and hashrefs
5607:
5608: =item *
5609:
5610: arrayref2str($arrayref) : convert an arrayref into a string complete
5611: with escaping and '&' separators, supports elements that are arrayrefs
5612: and hashrefs
5613:
5614: =item *
5615:
5616: str2hash($string) : convert string to hash using unescaping and
5617: splitting on '=' and '&', supports elements that are arrayrefs and
5618: hashrefs
5619:
5620: =item *
5621:
5622: str2array($string) : convert string to hash using unescaping and
5623: splitting on '&', supports elements that are arrayrefs and hashrefs
5624:
5625: =back
5626:
5627: =head2 Logging Routines
5628:
5629: =over 4
5630:
5631: These routines allow one to make log messages in the lonnet.log and
5632: lonnet.perm logfiles.
5633:
5634: =item *
5635:
5636: logtouch() : make sure the logfile, lonnet.log, exists
5637:
5638: =item *
5639:
5640: logthis() : append message to the normal lonnet.log file, it gets
5641: preiodically rolled over and deleted.
5642:
5643: =item *
5644:
5645: logperm() : append a permanent message to lonnet.perm.log, this log
5646: file never gets deleted by any automated portion of the system, only
5647: messages of critical importance should go in here.
5648:
5649: =back
5650:
5651: =head2 General File Helper Routines
5652:
5653: =over 4
5654:
5655: =item *
5656:
5657: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
5658: (a) files in /uploaded
5659: (i) If a local copy of the file exists -
5660: compares modification date of local copy with last-modified date for
5661: definitive version stored on home server for course. If local copy is
5662: stale, requests a new version from the home server and stores it.
5663: If the original has been removed from the home server, then local copy
5664: is unlinked.
5665: (ii) If local copy does not exist -
5666: requests the file from the home server and stores it.
5667:
5668: If $caller is 'uploadrep':
5669: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
5670: for request for files originally uploaded via DOCS.
5671: - returns 'ok' if fresh local copy now available, -1 otherwise.
5672:
5673: Otherwise:
5674: This indicates a call from the content generation phase of the request.
5675: - returns the entire contents of the file or -1.
5676:
5677: (b) files in /res
5678: - returns the entire contents of a file or -1;
5679: it properly subscribes to and replicates the file if neccessary.
5680:
5681: =item *
5682:
5683: filelocation($dir,$file) : returns file system location of a file
5684: based on URI; meant to be "fairly clean" absolute reference, $dir is a
5685: directory that relative $file lookups are to looked in ($dir of /a/dir
5686: and a file of ../bob will become /a/bob)
5687:
5688: =item *
5689:
5690: hreflocation($dir,$file) : returns file system location or a URL; same as
5691: filelocation except for hrefs
5692:
5693: =item *
5694:
5695: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
5696:
5697: =back
5698:
5699: =head2 HTTP Helper Routines
5700:
5701: =over 4
5702:
5703: =item *
5704:
5705: escape() : unpack non-word characters into CGI-compatible hex codes
5706:
5707: =item *
5708:
5709: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
5710:
5711: =back
5712:
5713: =head1 PRIVATE SUBROUTINES
5714:
5715: =head2 Underlying communication routines (Shouldn't call)
5716:
5717: =over 4
5718:
5719: =item *
5720:
5721: subreply() : tries to pass a message to lonc, returns con_lost if incapable
5722:
5723: =item *
5724:
5725: reply() : uses subreply to send a message to remote machine, logs all failures
5726:
5727: =item *
5728:
5729: critical() : passes a critical message to another server; if cannot
5730: get through then place message in connection buffer directory and
5731: returns con_delayed, if incapable of saving message, returns
5732: con_failed
5733:
5734: =item *
5735:
5736: reconlonc() : tries to reconnect lonc client processes.
5737:
5738: =back
5739:
5740: =head2 Resource Access Logging
5741:
5742: =over 4
5743:
5744: =item *
5745:
5746: flushcourselogs() : flush (save) buffer logs and access logs
5747:
5748: =item *
5749:
5750: courselog($what) : save message for course in hash
5751:
5752: =item *
5753:
5754: courseacclog($what) : save message for course using &courselog(). Perform
5755: special processing for specific resource types (problems, exams, quizzes, etc).
5756:
5757: =item *
5758:
5759: goodbye() : flush course logs and log shutting down; it is called in srm.conf
5760: as a PerlChildExitHandler
5761:
5762: =back
5763:
5764: =head2 Other
5765:
5766: =over 4
5767:
5768: =item *
5769:
5770: symblist($mapname,%newhash) : update symbolic storage links
5771:
5772: =back
5773:
5774: =cut
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