1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.492 2004/04/29 17:25:11 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonnet;
31:
32: use strict;
33: use LWP::UserAgent();
34: use HTTP::Headers;
35: use HTTP::Date;
36: # use Date::Parse;
37: use vars
38: qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom
39: %libserv %pr %prp %metacache %packagetab %titlecache %courseresversioncache %resversioncache
40: %courselogs %accesshash %userrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseresdatacache
42: %userresdatacache %usectioncache %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir);
44:
45: use IO::Socket;
46: use GDBM_File;
47: use Apache::Constants qw(:common :http);
48: use HTML::LCParser;
49: use Fcntl qw(:flock);
50: use Apache::loncoursedata;
51: use Apache::lonlocal;
52: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw);
53: use Time::HiRes();
54: my $readit;
55:
56: =pod
57:
58: =head1 Package Variables
59:
60: These are largely undocumented, so if you decipher one please note it here.
61:
62: =over 4
63:
64: =item $processmarker
65:
66: Contains the time this process was started and this servers host id.
67:
68: =item $dumpcount
69:
70: Counts the number of times a message log flush has been attempted (regardless
71: of success) by this process. Used as part of the filename when messages are
72: delayed.
73:
74: =back
75:
76: =cut
77:
78:
79: # --------------------------------------------------------------------- Logging
80:
81: sub logtouch {
82: my $execdir=$perlvar{'lonDaemons'};
83: unless (-e "$execdir/logs/lonnet.log") {
84: open(my $fh,">>$execdir/logs/lonnet.log");
85: close $fh;
86: }
87: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
88: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
89: }
90:
91: sub logthis {
92: my $message=shift;
93: my $execdir=$perlvar{'lonDaemons'};
94: my $now=time;
95: my $local=localtime($now);
96: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
97: print $fh "$local ($$): $message\n";
98: close($fh);
99: }
100: return 1;
101: }
102:
103: sub logperm {
104: my $message=shift;
105: my $execdir=$perlvar{'lonDaemons'};
106: my $now=time;
107: my $local=localtime($now);
108: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
109: print $fh "$now:$message:$local\n";
110: close($fh);
111: }
112: return 1;
113: }
114:
115: # -------------------------------------------------- Non-critical communication
116: sub subreply {
117: my ($cmd,$server)=@_;
118: my $peerfile="$perlvar{'lonSockDir'}/$server";
119: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
120: Type => SOCK_STREAM,
121: Timeout => 10)
122: or return "con_lost";
123: print $client "$cmd\n";
124: my $answer=<$client>;
125: if (!$answer) { $answer="con_lost"; }
126: chomp($answer);
127: return $answer;
128: }
129:
130: sub reply {
131: my ($cmd,$server)=@_;
132: unless (defined($hostname{$server})) { return 'no_such_host'; }
133: my $answer=subreply($cmd,$server);
134: if ($answer eq 'con_lost') {
135: #sleep 5;
136: #$answer=subreply($cmd,$server);
137: #if ($answer eq 'con_lost') {
138: # &logthis("Second attempt con_lost on $server");
139: # my $peerfile="$perlvar{'lonSockDir'}/$server";
140: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
141: # Type => SOCK_STREAM,
142: # Timeout => 10)
143: # or return "con_lost";
144: # &logthis("Killing socket");
145: # print $client "close_connection_exit\n";
146: #sleep 5;
147: # $answer=subreply($cmd,$server);
148: #}
149: }
150: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
151: &logthis("<font color=blue>WARNING:".
152: " $cmd to $server returned $answer</font>");
153: }
154: return $answer;
155: }
156:
157: # ----------------------------------------------------------- Send USR1 to lonc
158:
159: sub reconlonc {
160: my $peerfile=shift;
161: &logthis("Trying to reconnect for $peerfile");
162: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
163: if (open(my $fh,"<$loncfile")) {
164: my $loncpid=<$fh>;
165: chomp($loncpid);
166: if (kill 0 => $loncpid) {
167: &logthis("lonc at pid $loncpid responding, sending USR1");
168: kill USR1 => $loncpid;
169: sleep 1;
170: if (-e "$peerfile") { return; }
171: &logthis("$peerfile still not there, give it another try");
172: sleep 5;
173: if (-e "$peerfile") { return; }
174: &logthis(
175: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
176: } else {
177: &logthis(
178: "<font color=blue>WARNING:".
179: " lonc at pid $loncpid not responding, giving up</font>");
180: }
181: } else {
182: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
183: }
184: }
185:
186: # ------------------------------------------------------ Critical communication
187:
188: sub critical {
189: my ($cmd,$server)=@_;
190: unless ($hostname{$server}) {
191: &logthis("<font color=blue>WARNING:".
192: " Critical message to unknown server ($server)</font>");
193: return 'no_such_host';
194: }
195: my $answer=reply($cmd,$server);
196: if ($answer eq 'con_lost') {
197: my $pingreply=reply('ping',$server);
198: &reconlonc("$perlvar{'lonSockDir'}/$server");
199: my $pongreply=reply('pong',$server);
200: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
201: $answer=reply($cmd,$server);
202: if ($answer eq 'con_lost') {
203: my $now=time;
204: my $middlename=$cmd;
205: $middlename=substr($middlename,0,16);
206: $middlename=~s/\W//g;
207: my $dfilename=
208: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
209: $dumpcount++;
210: {
211: my $dfh;
212: if (open($dfh,">$dfilename")) {
213: print $dfh "$cmd\n";
214: close($dfh);
215: }
216: }
217: sleep 2;
218: my $wcmd='';
219: {
220: my $dfh;
221: if (open($dfh,"<$dfilename")) {
222: $wcmd=<$dfh>;
223: close($dfh);
224: }
225: }
226: chomp($wcmd);
227: if ($wcmd eq $cmd) {
228: &logthis("<font color=blue>WARNING: ".
229: "Connection buffer $dfilename: $cmd</font>");
230: &logperm("D:$server:$cmd");
231: return 'con_delayed';
232: } else {
233: &logthis("<font color=red>CRITICAL:"
234: ." Critical connection failed: $server $cmd</font>");
235: &logperm("F:$server:$cmd");
236: return 'con_failed';
237: }
238: }
239: }
240: return $answer;
241: }
242:
243: #
244: # -------------- Remove all key from the env that start witha lowercase letter
245: # (Which is always a lon-capa value)
246:
247: sub cleanenv {
248: # unless (defined(&Apache::exists_config_define("MODPERL2"))) { return; }
249: # unless (&Apache::exists_config_define("MODPERL2")) { return; }
250: foreach my $key (keys(%ENV)) {
251: if ($key =~ /^[a-z]/) {
252: delete($ENV{$key});
253: }
254: }
255: }
256:
257: # ------------------------------------------- Transfer profile into environment
258:
259: sub transfer_profile_to_env {
260: my ($lonidsdir,$handle)=@_;
261: my @profile;
262: {
263: open(my $idf,"$lonidsdir/$handle.id");
264: flock($idf,LOCK_SH);
265: @profile=<$idf>;
266: close($idf);
267: }
268: my $envi;
269: my %Remove;
270: for ($envi=0;$envi<=$#profile;$envi++) {
271: chomp($profile[$envi]);
272: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
273: $ENV{$envname} = $envvalue;
274: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
275: if ($time < time-300) {
276: $Remove{$key}++;
277: }
278: }
279: }
280: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
281: foreach my $expired_key (keys(%Remove)) {
282: &delenv($expired_key);
283: }
284: }
285:
286: # ---------------------------------------------------------- Append Environment
287:
288: sub appenv {
289: my %newenv=@_;
290: foreach (keys %newenv) {
291: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
292: &logthis("<font color=blue>WARNING: ".
293: "Attempt to modify environment ".$_." to ".$newenv{$_}
294: .'</font>');
295: delete($newenv{$_});
296: } else {
297: $ENV{$_}=$newenv{$_};
298: }
299: }
300:
301: my $lockfh;
302: unless (open($lockfh,"$ENV{'user.environment'}")) {
303: return 'error: '.$!;
304: }
305: unless (flock($lockfh,LOCK_EX)) {
306: &logthis("<font color=blue>WARNING: ".
307: 'Could not obtain exclusive lock in appenv: '.$!);
308: close($lockfh);
309: return 'error: '.$!;
310: }
311:
312: my @oldenv;
313: {
314: my $fh;
315: unless (open($fh,"$ENV{'user.environment'}")) {
316: return 'error: '.$!;
317: }
318: @oldenv=<$fh>;
319: close($fh);
320: }
321: for (my $i=0; $i<=$#oldenv; $i++) {
322: chomp($oldenv[$i]);
323: if ($oldenv[$i] ne '') {
324: my ($name,$value)=split(/=/,$oldenv[$i]);
325: unless (defined($newenv{$name})) {
326: $newenv{$name}=$value;
327: }
328: }
329: }
330: {
331: my $fh;
332: unless (open($fh,">$ENV{'user.environment'}")) {
333: return 'error';
334: }
335: my $newname;
336: foreach $newname (keys %newenv) {
337: print $fh "$newname=$newenv{$newname}\n";
338: }
339: close($fh);
340: }
341:
342: close($lockfh);
343: return 'ok';
344: }
345: # ----------------------------------------------------- Delete from Environment
346:
347: sub delenv {
348: my $delthis=shift;
349: my %newenv=();
350: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
351: &logthis("<font color=blue>WARNING: ".
352: "Attempt to delete from environment ".$delthis);
353: return 'error';
354: }
355: my @oldenv;
356: {
357: my $fh;
358: unless (open($fh,"$ENV{'user.environment'}")) {
359: return 'error';
360: }
361: unless (flock($fh,LOCK_SH)) {
362: &logthis("<font color=blue>WARNING: ".
363: 'Could not obtain shared lock in delenv: '.$!);
364: close($fh);
365: return 'error: '.$!;
366: }
367: @oldenv=<$fh>;
368: close($fh);
369: }
370: {
371: my $fh;
372: unless (open($fh,">$ENV{'user.environment'}")) {
373: return 'error';
374: }
375: unless (flock($fh,LOCK_EX)) {
376: &logthis("<font color=blue>WARNING: ".
377: 'Could not obtain exclusive lock in delenv: '.$!);
378: close($fh);
379: return 'error: '.$!;
380: }
381: foreach (@oldenv) {
382: if ($_=~/^$delthis/) {
383: my ($key,undef) = split('=',$_);
384: delete($ENV{$key});
385: } else {
386: print $fh $_;
387: }
388: }
389: close($fh);
390: }
391: return 'ok';
392: }
393:
394: # ------------------------------------------ Find out current server userload
395: # there is a copy in lond
396: sub userload {
397: my $numusers=0;
398: {
399: opendir(LONIDS,$perlvar{'lonIDsDir'});
400: my $filename;
401: my $curtime=time;
402: while ($filename=readdir(LONIDS)) {
403: if ($filename eq '.' || $filename eq '..') {next;}
404: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
405: if ($curtime-$mtime < 1800) { $numusers++; }
406: }
407: closedir(LONIDS);
408: }
409: my $userloadpercent=0;
410: my $maxuserload=$perlvar{'lonUserLoadLim'};
411: if ($maxuserload) {
412: $userloadpercent=100*$numusers/$maxuserload;
413: }
414: $userloadpercent=sprintf("%.2f",$userloadpercent);
415: return $userloadpercent;
416: }
417:
418: # ------------------------------------------ Fight off request when overloaded
419:
420: sub overloaderror {
421: my ($r,$checkserver)=@_;
422: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
423: my $loadavg;
424: if ($checkserver eq $perlvar{'lonHostID'}) {
425: open(my $loadfile,'/proc/loadavg');
426: $loadavg=<$loadfile>;
427: $loadavg =~ s/\s.*//g;
428: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
429: close($loadfile);
430: } else {
431: $loadavg=&reply('load',$checkserver);
432: }
433: my $overload=$loadavg-100;
434: if ($overload>0) {
435: $r->err_headers_out->{'Retry-After'}=$overload;
436: $r->log_error('Overload of '.$overload.' on '.$checkserver);
437: return 413;
438: }
439: return '';
440: }
441:
442: # ------------------------------ Find server with least workload from spare.tab
443:
444: sub spareserver {
445: my ($loadpercent,$userloadpercent) = @_;
446: my $tryserver;
447: my $spareserver='';
448: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
449: my $lowestserver=$loadpercent > $userloadpercent?
450: $loadpercent : $userloadpercent;
451: foreach $tryserver (keys %spareid) {
452: my $loadans=reply('load',$tryserver);
453: my $userloadans=reply('userload',$tryserver);
454: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
455: next; #didn't get a number from the server
456: }
457: my $answer;
458: if ($loadans =~ /\d/) {
459: if ($userloadans =~ /\d/) {
460: #both are numbers, pick the bigger one
461: $answer=$loadans > $userloadans?
462: $loadans : $userloadans;
463: } else {
464: $answer = $loadans;
465: }
466: } else {
467: $answer = $userloadans;
468: }
469: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
470: $spareserver="http://$hostname{$tryserver}";
471: $lowestserver=$answer;
472: }
473: }
474: return $spareserver;
475: }
476:
477: # --------------------------------------------- Try to change a user's password
478:
479: sub changepass {
480: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
481: $currentpass = &escape($currentpass);
482: $newpass = &escape($newpass);
483: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
484: $server);
485: if (! $answer) {
486: &logthis("No reply on password change request to $server ".
487: "by $uname in domain $udom.");
488: } elsif ($answer =~ "^ok") {
489: &logthis("$uname in $udom successfully changed their password ".
490: "on $server.");
491: } elsif ($answer =~ "^pwchange_failure") {
492: &logthis("$uname in $udom was unable to change their password ".
493: "on $server. The action was blocked by either lcpasswd ".
494: "or pwchange");
495: } elsif ($answer =~ "^non_authorized") {
496: &logthis("$uname in $udom did not get their password correct when ".
497: "attempting to change it on $server.");
498: } elsif ($answer =~ "^auth_mode_error") {
499: &logthis("$uname in $udom attempted to change their password despite ".
500: "not being locally or internally authenticated on $server.");
501: } elsif ($answer =~ "^unknown_user") {
502: &logthis("$uname in $udom attempted to change their password ".
503: "on $server but were unable to because $server is not ".
504: "their home server.");
505: } elsif ($answer =~ "^refused") {
506: &logthis("$server refused to change $uname in $udom password because ".
507: "it was sent an unencrypted request to change the password.");
508: }
509: return $answer;
510: }
511:
512: # ----------------------- Try to determine user's current authentication scheme
513:
514: sub queryauthenticate {
515: my ($uname,$udom)=@_;
516: my $uhome=&homeserver($uname,$udom);
517: if (!$uhome) {
518: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
519: return 'no_host';
520: }
521: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
522: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
523: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
524: }
525: return $answer;
526: }
527:
528: # --------- Try to authenticate user from domain's lib servers (first this one)
529:
530: sub authenticate {
531: my ($uname,$upass,$udom)=@_;
532: $upass=escape($upass);
533: $uname=~s/\W//g;
534: my $uhome=&homeserver($uname,$udom);
535: if (!$uhome) {
536: &logthis("User $uname at $udom is unknown in authenticate");
537: return 'no_host';
538: }
539: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
540: if ($answer eq 'authorized') {
541: &logthis("User $uname at $udom authorized by $uhome");
542: return $uhome;
543: }
544: if ($answer eq 'non_authorized') {
545: &logthis("User $uname at $udom rejected by $uhome");
546: return 'no_host';
547: }
548: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
549: return 'no_host';
550: }
551:
552: # ---------------------- Find the homebase for a user from domain's lib servers
553:
554: sub homeserver {
555: my ($uname,$udom,$ignoreBadCache)=@_;
556: my $index="$uname:$udom";
557:
558: my ($result,$cached)=&is_cached(\%homecache,$index,'home',86400);
559: if (defined($cached)) { return $result; }
560: my $tryserver;
561: foreach $tryserver (keys %libserv) {
562: next if ($ignoreBadCache ne 'true' &&
563: exists($badServerCache{$tryserver}));
564: if ($hostdom{$tryserver} eq $udom) {
565: my $answer=reply("home:$udom:$uname",$tryserver);
566: if ($answer eq 'found') {
567: return &do_cache(\%homecache,$index,$tryserver,'home');
568: } elsif ($answer eq 'no_host') {
569: $badServerCache{$tryserver}=1;
570: }
571: }
572: }
573: return 'no_host';
574: }
575:
576: # ------------------------------------- Find the usernames behind a list of IDs
577:
578: sub idget {
579: my ($udom,@ids)=@_;
580: my %returnhash=();
581:
582: my $tryserver;
583: foreach $tryserver (keys %libserv) {
584: if ($hostdom{$tryserver} eq $udom) {
585: my $idlist=join('&',@ids);
586: $idlist=~tr/A-Z/a-z/;
587: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
588: my @answer=();
589: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
590: @answer=split(/\&/,$reply);
591: } ;
592: my $i;
593: for ($i=0;$i<=$#ids;$i++) {
594: if ($answer[$i]) {
595: $returnhash{$ids[$i]}=$answer[$i];
596: }
597: }
598: }
599: }
600: return %returnhash;
601: }
602:
603: # ------------------------------------- Find the IDs behind a list of usernames
604:
605: sub idrget {
606: my ($udom,@unames)=@_;
607: my %returnhash=();
608: foreach (@unames) {
609: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
610: }
611: return %returnhash;
612: }
613:
614: # ------------------------------- Store away a list of names and associated IDs
615:
616: sub idput {
617: my ($udom,%ids)=@_;
618: my %servers=();
619: foreach (keys %ids) {
620: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
621: my $uhom=&homeserver($_,$udom);
622: if ($uhom ne 'no_host') {
623: my $id=&escape($ids{$_});
624: $id=~tr/A-Z/a-z/;
625: my $unam=&escape($_);
626: if ($servers{$uhom}) {
627: $servers{$uhom}.='&'.$id.'='.$unam;
628: } else {
629: $servers{$uhom}=$id.'='.$unam;
630: }
631: }
632: }
633: foreach (keys %servers) {
634: &critical('idput:'.$udom.':'.$servers{$_},$_);
635: }
636: }
637:
638: # --------------------------------------------------- Assign a key to a student
639:
640: sub assign_access_key {
641: #
642: # a valid key looks like uname:udom#comments
643: # comments are being appended
644: #
645: my ($ckey,$cdom,$cnum,$udom,$uname,$logentry)=@_;
646: $cdom=
647: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
648: $cnum=
649: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
650: $udom=$ENV{'user.name'} unless (defined($udom));
651: $uname=$ENV{'user.domain'} unless (defined($uname));
652: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
653: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
654: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
655: # assigned to this person
656: # - this should not happen,
657: # unless something went wrong
658: # the first time around
659: # ready to assign
660: $logentry=$1.'; '.$logentry;
661: if (&put('accesskey',{$ckey=>$uname.':'.$udom.'#'.$logentry},
662: $cdom,$cnum) eq 'ok') {
663: # key now belongs to user
664: my $envkey='key.'.$cdom.'_'.$cnum;
665: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
666: &appenv('environment.'.$envkey => $ckey);
667: return 'ok';
668: } else {
669: return
670: 'error: Count not permanently assign key, will need to be re-entered later.';
671: }
672: } else {
673: return 'error: Could not assign key, try again later.';
674: }
675: } elsif (!$existing{$ckey}) {
676: # the key does not exist
677: return 'error: The key does not exist';
678: } else {
679: # the key is somebody else's
680: return 'error: The key is already in use';
681: }
682: }
683:
684: # ------------------------------------------ put an additional comment on a key
685:
686: sub comment_access_key {
687: #
688: # a valid key looks like uname:udom#comments
689: # comments are being appended
690: #
691: my ($ckey,$cdom,$cnum,$logentry)=@_;
692: $cdom=
693: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
694: $cnum=
695: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
696: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
697: if ($existing{$ckey}) {
698: $existing{$ckey}.='; '.$logentry;
699: # ready to assign
700: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
701: $cdom,$cnum) eq 'ok') {
702: return 'ok';
703: } else {
704: return 'error: Count not store comment.';
705: }
706: } else {
707: # the key does not exist
708: return 'error: The key does not exist';
709: }
710: }
711:
712: # ------------------------------------------------------ Generate a set of keys
713:
714: sub generate_access_keys {
715: my ($number,$cdom,$cnum,$logentry)=@_;
716: $cdom=
717: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
718: $cnum=
719: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
720: unless (&allowed('mky',$cdom)) { return 0; }
721: unless (($cdom) && ($cnum)) { return 0; }
722: if ($number>10000) { return 0; }
723: sleep(2); # make sure don't get same seed twice
724: srand(time()^($$+($$<<15))); # from "Programming Perl"
725: my $total=0;
726: for (my $i=1;$i<=$number;$i++) {
727: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
728: sprintf("%lx",int(100000*rand)).'-'.
729: sprintf("%lx",int(100000*rand));
730: $newkey=~s/1/g/g; # folks mix up 1 and l
731: $newkey=~s/0/h/g; # and also 0 and O
732: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
733: if ($existing{$newkey}) {
734: $i--;
735: } else {
736: if (&put('accesskeys',
737: { $newkey => '# generated '.localtime().
738: ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
739: '; '.$logentry },
740: $cdom,$cnum) eq 'ok') {
741: $total++;
742: }
743: }
744: }
745: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
746: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
747: return $total;
748: }
749:
750: # ------------------------------------------------------- Validate an accesskey
751:
752: sub validate_access_key {
753: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
754: $cdom=
755: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
756: $cnum=
757: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
758: $udom=$ENV{'user.name'} unless (defined($udom));
759: $uname=$ENV{'user.domain'} unless (defined($uname));
760: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
761: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
762: }
763:
764: # ------------------------------------- Find the section of student in a course
765:
766: sub getsection {
767: my ($udom,$unam,$courseid)=@_;
768: $courseid=~s/\_/\//g;
769: $courseid=~s/^(\w)/\/$1/;
770: my %Pending;
771: my %Expired;
772: #
773: # Each role can either have not started yet (pending), be active,
774: # or have expired.
775: #
776: # If there is an active role, we are done.
777: #
778: # If there is more than one role which has not started yet,
779: # choose the one which will start sooner
780: # If there is one role which has not started yet, return it.
781: #
782: # If there is more than one expired role, choose the one which ended last.
783: # If there is a role which has expired, return it.
784: #
785: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
786: &homeserver($unam,$udom)))) {
787: my ($key,$value)=split(/\=/,$_);
788: $key=&unescape($key);
789: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
790: my $section=$1;
791: if ($key eq $courseid.'_st') { $section=''; }
792: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
793: my $now=time;
794: if (defined($end) && ($now > $end)) {
795: $Expired{$end}=$section;
796: next;
797: }
798: if (defined($start) && ($now < $start)) {
799: $Pending{$start}=$section;
800: next;
801: }
802: return $section;
803: }
804: #
805: # Presumedly there will be few matching roles from the above
806: # loop and the sorting time will be negligible.
807: if (scalar(keys(%Pending))) {
808: my ($time) = sort {$a <=> $b} keys(%Pending);
809: return $Pending{$time};
810: }
811: if (scalar(keys(%Expired))) {
812: my @sorted = sort {$a <=> $b} keys(%Expired);
813: my $time = pop(@sorted);
814: return $Expired{$time};
815: }
816: return '-1';
817: }
818:
819:
820: my $disk_caching_disabled=1;
821:
822: sub devalidate_cache {
823: my ($cache,$id,$name) = @_;
824: delete $$cache{$id.'.time'};
825: delete $$cache{$id};
826: if ($disk_caching_disabled) { return; }
827: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
828: open(DB,"$filename.lock");
829: flock(DB,LOCK_EX);
830: my %hash;
831: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
832: eval <<'EVALBLOCK';
833: delete($hash{$id});
834: delete($hash{$id.'.time'});
835: EVALBLOCK
836: if ($@) {
837: &logthis("<font color='red'>devalidate_cache blew up :$@:$name</font>");
838: unlink($filename);
839: }
840: } else {
841: if (-e $filename) {
842: &logthis("Unable to tie hash (devalidate cache): $name");
843: unlink($filename);
844: }
845: }
846: untie(%hash);
847: flock(DB,LOCK_UN);
848: close(DB);
849: }
850:
851: sub is_cached {
852: my ($cache,$id,$name,$time) = @_;
853: if (!$time) { $time=300; }
854: if (!exists($$cache{$id.'.time'})) {
855: &load_cache_item($cache,$name,$id);
856: }
857: if (!exists($$cache{$id.'.time'})) {
858: # &logthis("Didn't find $id");
859: return (undef,undef);
860: } else {
861: if (time-($$cache{$id.'.time'})>$time) {
862: # &logthis("Devalidating $id - ".time-($$cache{$id.'.time'}));
863: &devalidate_cache($cache,$id,$name);
864: return (undef,undef);
865: }
866: }
867: return ($$cache{$id},1);
868: }
869:
870: sub do_cache {
871: my ($cache,$id,$value,$name) = @_;
872: $$cache{$id.'.time'}=time;
873: $$cache{$id}=$value;
874: # &logthis("Caching $id as :$value:");
875: &save_cache_item($cache,$name,$id);
876: # do_cache implictly return the set value
877: $$cache{$id};
878: }
879:
880: sub save_cache_item {
881: my ($cache,$name,$id)=@_;
882: if ($disk_caching_disabled) { return; }
883: my $starttime=&Time::HiRes::time();
884: # &logthis("Saving :$name:$id");
885: my %hash;
886: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
887: open(DB,"$filename.lock");
888: flock(DB,LOCK_EX);
889: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
890: eval <<'EVALBLOCK';
891: $hash{$id.'.time'}=$$cache{$id.'.time'};
892: $hash{$id}=freeze({'item'=>$$cache{$id}});
893: EVALBLOCK
894: if ($@) {
895: &logthis("<font color='red'>save_cache blew up :$@:$name</font>");
896: unlink($filename);
897: }
898: } else {
899: if (-e $filename) {
900: &logthis("Unable to tie hash (save cache item): $name ($!)");
901: unlink($filename);
902: }
903: }
904: untie(%hash);
905: flock(DB,LOCK_UN);
906: close(DB);
907: # &logthis("save_cache_item $name took ".(&Time::HiRes::time()-$starttime));
908: }
909:
910: sub load_cache_item {
911: my ($cache,$name,$id)=@_;
912: if ($disk_caching_disabled) { return; }
913: my $starttime=&Time::HiRes::time();
914: # &logthis("Before Loading $name for $id size is ".scalar(%$cache));
915: my %hash;
916: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
917: open(DB,"$filename.lock");
918: flock(DB,LOCK_SH);
919: if (tie(%hash,'GDBM_File',$filename,&GDBM_READER(),0640)) {
920: eval <<'EVALBLOCK';
921: if (!%$cache) {
922: my $count;
923: while (my ($key,$value)=each(%hash)) {
924: $count++;
925: if ($key =~ /\.time$/) {
926: $$cache{$key}=$value;
927: } else {
928: my $hashref=thaw($value);
929: $$cache{$key}=$hashref->{'item'};
930: }
931: }
932: # &logthis("Initial load: $count");
933: } else {
934: my $hashref=thaw($hash{$id});
935: $$cache{$id}=$hashref->{'item'};
936: $$cache{$id.'.time'}=$hash{$id.'.time'};
937: }
938: EVALBLOCK
939: if ($@) {
940: &logthis("<font color='red'>load_cache blew up :$@:$name</font>");
941: unlink($filename);
942: }
943: } else {
944: if (-e $filename) {
945: &logthis("Unable to tie hash (load cache item): $name ($!)");
946: unlink($filename);
947: }
948: }
949: untie(%hash);
950: flock(DB,LOCK_UN);
951: close(DB);
952: # &logthis("After Loading $name size is ".scalar(%$cache));
953: # &logthis("load_cache_item $name took ".(&Time::HiRes::time()-$starttime));
954: }
955:
956: sub usection {
957: my ($udom,$unam,$courseid)=@_;
958: my $hashid="$udom:$unam:$courseid";
959:
960: my ($result,$cached)=&is_cached(\%usectioncache,$hashid,'usection');
961: if (defined($cached)) { return $result; }
962: $courseid=~s/\_/\//g;
963: $courseid=~s/^(\w)/\/$1/;
964: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
965: &homeserver($unam,$udom)))) {
966: my ($key,$value)=split(/\=/,$_);
967: $key=&unescape($key);
968: if ($key=~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/) {
969: my $section=$1;
970: if ($key eq $courseid.'_st') { $section=''; }
971: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
972: my $now=time;
973: my $notactive=0;
974: if ($start) {
975: if ($now<$start) { $notactive=1; }
976: }
977: if ($end) {
978: if ($now>$end) { $notactive=1; }
979: }
980: unless ($notactive) {
981: return &do_cache(\%usectioncache,$hashid,$section,'usection');
982: }
983: }
984: }
985: return &do_cache(\%usectioncache,$hashid,'-1','usection');
986: }
987:
988: # ------------------------------------- Read an entry from a user's environment
989:
990: sub userenvironment {
991: my ($udom,$unam,@what)=@_;
992: my %returnhash=();
993: my @answer=split(/\&/,
994: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
995: &homeserver($unam,$udom)));
996: my $i;
997: for ($i=0;$i<=$#what;$i++) {
998: $returnhash{$what[$i]}=&unescape($answer[$i]);
999: }
1000: return %returnhash;
1001: }
1002:
1003: # -------------------------------------------------------------------- New chat
1004:
1005: sub chatsend {
1006: my ($newentry,$anon)=@_;
1007: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1008: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1009: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1010: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1011: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
1012: &escape($newentry)),$chome);
1013: }
1014:
1015: # ------------------------------------------ Find current version of a resource
1016:
1017: sub getversion {
1018: my $fname=&clutter(shift);
1019: unless ($fname=~/^\/res\//) { return -1; }
1020: return ¤tversion(&filelocation('',$fname));
1021: }
1022:
1023: sub currentversion {
1024: my $fname=shift;
1025: my ($result,$cached)=&is_cached(\%resversioncache,$fname,'resversion',600);
1026: if (defined($cached)) { return $result; }
1027: my $author=$fname;
1028: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1029: my ($udom,$uname)=split(/\//,$author);
1030: my $home=homeserver($uname,$udom);
1031: if ($home eq 'no_host') {
1032: return -1;
1033: }
1034: my $answer=reply("currentversion:$fname",$home);
1035: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1036: return -1;
1037: }
1038: return &do_cache(\%resversioncache,$fname,$answer,'resversion');
1039: }
1040:
1041: # ----------------------------- Subscribe to a resource, return URL if possible
1042:
1043: sub subscribe {
1044: my $fname=shift;
1045: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1046: my $author=$fname;
1047: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1048: my ($udom,$uname)=split(/\//,$author);
1049: my $home=homeserver($uname,$udom);
1050: if ($home eq 'no_host') {
1051: return 'not_found';
1052: }
1053: my $answer=reply("sub:$fname",$home);
1054: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1055: $answer.=' by '.$home;
1056: }
1057: return $answer;
1058: }
1059:
1060: # -------------------------------------------------------------- Replicate file
1061:
1062: sub repcopy {
1063: my $filename=shift;
1064: $filename=~s/\/+/\//g;
1065: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
1066: my $transname="$filename.in.transfer";
1067: if ((-e $filename) || (-e $transname)) { return OK; }
1068: my $remoteurl=subscribe($filename);
1069: if ($remoteurl =~ /^con_lost by/) {
1070: &logthis("Subscribe returned $remoteurl: $filename");
1071: return HTTP_SERVICE_UNAVAILABLE;
1072: } elsif ($remoteurl eq 'not_found') {
1073: #&logthis("Subscribe returned not_found: $filename");
1074: return HTTP_NOT_FOUND;
1075: } elsif ($remoteurl =~ /^rejected by/) {
1076: &logthis("Subscribe returned $remoteurl: $filename");
1077: return FORBIDDEN;
1078: } elsif ($remoteurl eq 'directory') {
1079: return OK;
1080: } else {
1081: my $author=$filename;
1082: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1083: my ($udom,$uname)=split(/\//,$author);
1084: my $home=homeserver($uname,$udom);
1085: unless ($home eq $perlvar{'lonHostID'}) {
1086: my @parts=split(/\//,$filename);
1087: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1088: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1089: &logthis("Malconfiguration for replication: $filename");
1090: return HTTP_BAD_REQUEST;
1091: }
1092: my $count;
1093: for ($count=5;$count<$#parts;$count++) {
1094: $path.="/$parts[$count]";
1095: if ((-e $path)!=1) {
1096: mkdir($path,0777);
1097: }
1098: }
1099: my $ua=new LWP::UserAgent;
1100: my $request=new HTTP::Request('GET',"$remoteurl");
1101: my $response=$ua->request($request,$transname);
1102: if ($response->is_error()) {
1103: unlink($transname);
1104: my $message=$response->status_line;
1105: &logthis("<font color=blue>WARNING:"
1106: ." LWP get: $message: $filename</font>");
1107: return HTTP_SERVICE_UNAVAILABLE;
1108: } else {
1109: if ($remoteurl!~/\.meta$/) {
1110: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1111: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1112: if ($mresponse->is_error()) {
1113: unlink($filename.'.meta');
1114: &logthis(
1115: "<font color=yellow>INFO: No metadata: $filename</font>");
1116: }
1117: }
1118: rename($transname,$filename);
1119: return OK;
1120: }
1121: }
1122: }
1123: }
1124:
1125: # ------------------------------------------------ Get server side include body
1126: sub ssi_body {
1127: my ($filelink,%form)=@_;
1128: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1129: &ssi($filelink,%form));
1130: $output=~s/^.*?\<body[^\>]*\>//si;
1131: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1132: $output=~
1133: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
1134: return $output;
1135: }
1136:
1137: # --------------------------------------------------------- Server Side Include
1138:
1139: sub ssi {
1140:
1141: my ($fn,%form)=@_;
1142:
1143: my $ua=new LWP::UserAgent;
1144:
1145: my $request;
1146:
1147: if (%form) {
1148: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1149: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1150: } else {
1151: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1152: }
1153:
1154: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1155: my $response=$ua->request($request);
1156:
1157: return $response->content;
1158: }
1159:
1160: sub externalssi {
1161: my ($url)=@_;
1162: my $ua=new LWP::UserAgent;
1163: my $request=new HTTP::Request('GET',$url);
1164: my $response=$ua->request($request);
1165: return $response->content;
1166: }
1167:
1168: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1169:
1170: sub allowuploaded {
1171: my ($srcurl,$url)=@_;
1172: $url=&clutter(&declutter($url));
1173: my $dir=$url;
1174: $dir=~s/\/[^\/]+$//;
1175: my %httpref=();
1176: my $httpurl=&hreflocation('',$url);
1177: $httpref{'httpref.'.$httpurl}=$srcurl;
1178: &Apache::lonnet::appenv(%httpref);
1179: }
1180:
1181: sub tokenwrapper {
1182: &FIXME_blow_up;
1183: }
1184:
1185: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1186: # input: action, courseID, current domain, home server for course, intended
1187: # path to file, source of file.
1188: # output: url to file (if action was uploaddoc),
1189: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1190: #
1191: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1192: # course.
1193: #
1194: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1195: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1196: # course's home server.
1197: #
1198: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1199: # be copied from $source (current location) to
1200: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1201: # and will then be copied to
1202: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1203: # course's home server.
1204: #
1205: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1206: # will be retrived from $ENV{form.uploaddoc} (from DOCS interface) to
1207: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1208: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1209: # in course's home server.
1210:
1211:
1212: sub process_coursefile {
1213: my ($action,$docuname,$docudom,$docuhome,$file,$source)=@_;
1214: my $fetchresult;
1215: if ($action eq 'propagate') {
1216: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file
1217: ,$docuhome);
1218: } else {
1219: my $fetchresult = '';
1220: my $fpath = '';
1221: my $fname = $file;
1222: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1223: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1224: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1225: unless ($fpath eq '') {
1226: my @parts=split('/',$fpath);
1227: foreach my $part (@parts) {
1228: $filepath.= '/'.$part;
1229: if ((-e $filepath)!=1) {
1230: mkdir($filepath,0777);
1231: }
1232: }
1233: }
1234: if ($action eq 'copy') {
1235: if ($source eq '') {
1236: $fetchresult = 'no source file';
1237: return $fetchresult;
1238: } else {
1239: my $destination = $filepath.'/'.$fname;
1240: rename($source,$destination);
1241: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1242: $docuhome);
1243: }
1244: } elsif ($action eq 'uploaddoc') {
1245: open(my $fh,'>'.$filepath.'/'.$fname);
1246: print $fh $ENV{'form.'.$source};
1247: close($fh);
1248: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1249: $docuhome);
1250: if ($fetchresult eq 'ok') {
1251: return '/uploaded/'.$fpath.'/'.$fname;
1252: } else {
1253: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1254: ' to host '.$docuhome.': '.$fetchresult);
1255: return '/adm/notfound.html';
1256: }
1257: }
1258: }
1259: unless ( $fetchresult eq 'ok') {
1260: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1261: ' to host '.$docuhome.': '.$fetchresult);
1262: }
1263: return $fetchresult;
1264: }
1265:
1266: # --------------- Take an uploaded file and put it into the userfiles directory
1267: # input: name of form element, coursedoc=1 means this is for the course
1268: # output: url of file in userspace
1269:
1270: sub userfileupload {
1271: my ($formname,$coursedoc)=@_;
1272: my $fname=$ENV{'form.'.$formname.'.filename'};
1273: # Replace Windows backslashes by forward slashes
1274: $fname=~s/\\/\//g;
1275: # Get rid of everything but the actual filename
1276: $fname=~s/^.*\/([^\/]+)$/$1/;
1277: # Replace spaces by underscores
1278: $fname=~s/\s+/\_/g;
1279: # Replace all other weird characters by nothing
1280: $fname=~s/[^\w\.\-]//g;
1281: # See if there is anything left
1282: unless ($fname) { return 'error: no uploaded file'; }
1283: chop($ENV{'form.'.$formname});
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: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1294: } else {
1295: $fname=$ENV{'form.folder'}.'/'.$fname;
1296: return &process_coursefile('uploaddoc',$docuname,$docudom,$docuhome,$fname,$formname);
1297: }
1298: } else {
1299: $docuname=$ENV{'user.name'};
1300: $docudom=$ENV{'user.domain'};
1301: $docuhome=$ENV{'user.home'};
1302: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1303: }
1304: }
1305:
1306: sub finishuserfileupload {
1307: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1308: my $path=$docudom.'/'.$docuname.'/';
1309: my $filepath=$perlvar{'lonDocRoot'};
1310: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1311: my $count;
1312: for ($count=4;$count<=$#parts;$count++) {
1313: $filepath.="/$parts[$count]";
1314: if ((-e $filepath)!=1) {
1315: mkdir($filepath,0777);
1316: }
1317: }
1318: # Save the file
1319: {
1320: open(my $fh,'>'.$filepath.'/'.$fname);
1321: print $fh $ENV{'form.'.$formname};
1322: close($fh);
1323: }
1324: # Notify homeserver to grep it
1325: #
1326: my $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,
1327: $docuhome);
1328: if ($fetchresult eq 'ok') {
1329: #
1330: # Return the URL to it
1331: return '/uploaded/'.$path.$fname;
1332: } else {
1333: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
1334: ' to host '.$docuhome.': '.$fetchresult);
1335: return '/adm/notfound.html';
1336: }
1337: }
1338:
1339: sub removeuserfile {
1340: my ($docuname,$docudom,$fname)=@_;
1341: my $home=&homeserver($docuname,$docudom);
1342: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1343: }
1344:
1345: # ------------------------------------------------------------------------- Log
1346:
1347: sub log {
1348: my ($dom,$nam,$hom,$what)=@_;
1349: return critical("log:$dom:$nam:$what",$hom);
1350: }
1351:
1352: # ------------------------------------------------------------------ Course Log
1353: #
1354: # This routine flushes several buffers of non-mission-critical nature
1355: #
1356:
1357: sub flushcourselogs {
1358: &logthis('Flushing log buffers');
1359: #
1360: # course logs
1361: # This is a log of all transactions in a course, which can be used
1362: # for data mining purposes
1363: #
1364: # It also collects the courseid database, which lists last transaction
1365: # times and course titles for all courseids
1366: #
1367: my %courseidbuffer=();
1368: foreach (keys %courselogs) {
1369: my $crsid=$_;
1370: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1371: &escape($courselogs{$crsid}),
1372: $coursehombuf{$crsid}) eq 'ok') {
1373: delete $courselogs{$crsid};
1374: } else {
1375: &logthis('Failed to flush log buffer for '.$crsid);
1376: if (length($courselogs{$crsid})>40000) {
1377: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1378: " exceeded maximum size, deleting.</font>");
1379: delete $courselogs{$crsid};
1380: }
1381: }
1382: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1383: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1384: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1385: } else {
1386: $courseidbuffer{$coursehombuf{$crsid}}=
1387: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1388: }
1389: }
1390: #
1391: # Write course id database (reverse lookup) to homeserver of courses
1392: # Is used in pickcourse
1393: #
1394: foreach (keys %courseidbuffer) {
1395: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1396: }
1397: #
1398: # File accesses
1399: # Writes to the dynamic metadata of resources to get hit counts, etc.
1400: #
1401: foreach my $entry (keys(%accesshash)) {
1402: if ($entry =~ /___count$/) {
1403: my ($dom,$name);
1404: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1405: if (! defined($dom) || $dom eq '' ||
1406: ! defined($name) || $name eq '') {
1407: my $cid = $ENV{'request.course.id'};
1408: $dom = $ENV{'request.'.$cid.'.domain'};
1409: $name = $ENV{'request.'.$cid.'.num'};
1410: }
1411: my $value = $accesshash{$entry};
1412: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1413: my %temphash=($url => $value);
1414: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1415: if ($result eq 'ok') {
1416: delete $accesshash{$entry};
1417: } elsif ($result eq 'unknown_cmd') {
1418: # Target server has old code running on it.
1419: my %temphash=($entry => $value);
1420: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1421: delete $accesshash{$entry};
1422: }
1423: }
1424: } else {
1425: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1426: my %temphash=($entry => $accesshash{$entry});
1427: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1428: delete $accesshash{$entry};
1429: }
1430: }
1431: }
1432: #
1433: # Roles
1434: # Reverse lookup of user roles for course faculty/staff and co-authorship
1435: #
1436: foreach (keys %userrolehash) {
1437: my $entry=$_;
1438: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1439: split(/\:/,$entry);
1440: if (&Apache::lonnet::put('nohist_userroles',
1441: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1442: $rudom,$runame) eq 'ok') {
1443: delete $userrolehash{$entry};
1444: }
1445: }
1446: $dumpcount++;
1447: }
1448:
1449: sub courselog {
1450: my $what=shift;
1451: $what=time.':'.$what;
1452: unless ($ENV{'request.course.id'}) { return ''; }
1453: $coursedombuf{$ENV{'request.course.id'}}=
1454: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1455: $coursenumbuf{$ENV{'request.course.id'}}=
1456: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1457: $coursehombuf{$ENV{'request.course.id'}}=
1458: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1459: $coursedescrbuf{$ENV{'request.course.id'}}=
1460: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1461: if (defined $courselogs{$ENV{'request.course.id'}}) {
1462: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1463: } else {
1464: $courselogs{$ENV{'request.course.id'}}.=$what;
1465: }
1466: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1467: &flushcourselogs();
1468: }
1469: }
1470:
1471: sub courseacclog {
1472: my $fnsymb=shift;
1473: unless ($ENV{'request.course.id'}) { return ''; }
1474: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1475: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1476: $what.=':POST';
1477: foreach (keys %ENV) {
1478: if ($_=~/^form\.(.*)/) {
1479: $what.=':'.$1.'='.$ENV{$_};
1480: }
1481: }
1482: }
1483: &courselog($what);
1484: }
1485:
1486: sub countacc {
1487: my $url=&declutter(shift);
1488: return if (! defined($url) || $url eq '');
1489: unless ($ENV{'request.course.id'}) { return ''; }
1490: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1491: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1492: $accesshash{$key}++;
1493: }
1494:
1495: sub linklog {
1496: my ($from,$to)=@_;
1497: $from=&declutter($from);
1498: $to=&declutter($to);
1499: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1500: $accesshash{$to.'___'.$from.'___goto'}=1;
1501: }
1502:
1503: sub userrolelog {
1504: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1505: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1506: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1507: ($trole=~/^cr/) || ($trole=~/^ta/)) {
1508: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1509: $userrolehash
1510: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1511: =$tend.':'.$tstart;
1512: }
1513: }
1514:
1515: sub get_course_adv_roles {
1516: my $cid=shift;
1517: $cid=$ENV{'request.course.id'} unless (defined($cid));
1518: my %coursehash=&coursedescription($cid);
1519: my %nothide=();
1520: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1521: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1522: }
1523: my %returnhash=();
1524: my %dumphash=
1525: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1526: my $now=time;
1527: foreach (keys %dumphash) {
1528: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1529: if (($tstart) && ($tstart<0)) { next; }
1530: if (($tend) && ($tend<$now)) { next; }
1531: if (($tstart) && ($now<$tstart)) { next; }
1532: my ($role,$username,$domain,$section)=split(/\:/,$_);
1533: if ((&privileged($username,$domain)) &&
1534: (!$nothide{$username.':'.$domain})) { next; }
1535: my $key=&plaintext($role);
1536: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1537: if ($returnhash{$key}) {
1538: $returnhash{$key}.=','.$username.':'.$domain;
1539: } else {
1540: $returnhash{$key}=$username.':'.$domain;
1541: }
1542: }
1543: return %returnhash;
1544: }
1545:
1546: sub get_my_roles {
1547: my ($uname,$udom)=@_;
1548: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1549: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1550: my %dumphash=
1551: &dump('nohist_userroles',$udom,$uname);
1552: my %returnhash=();
1553: my $now=time;
1554: foreach (keys %dumphash) {
1555: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1556: if (($tstart) && ($tstart<0)) { next; }
1557: if (($tend) && ($tend<$now)) { next; }
1558: if (($tstart) && ($now<$tstart)) { next; }
1559: my ($role,$username,$domain,$section)=split(/\:/,$_);
1560: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1561: }
1562: return %returnhash;
1563: }
1564:
1565: # ----------------------------------------------------- Frontpage Announcements
1566: #
1567: #
1568:
1569: sub postannounce {
1570: my ($server,$text)=@_;
1571: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1572: unless ($text=~/\w/) { $text=''; }
1573: return &reply('setannounce:'.&escape($text),$server);
1574: }
1575:
1576: sub getannounce {
1577:
1578: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1579: my $announcement='';
1580: while (<$fh>) { $announcement .=$_; }
1581: close($fh);
1582: if ($announcement=~/\w/) {
1583: return
1584: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1585: '<tr><td bgcolor="#FFFFFF"><pre>'.$announcement.'</pre></td></tr></table>';
1586: } else {
1587: return '';
1588: }
1589: } else {
1590: return '';
1591: }
1592: }
1593:
1594: # ---------------------------------------------------------- Course ID routines
1595: # Deal with domain's nohist_courseid.db files
1596: #
1597:
1598: sub courseidput {
1599: my ($domain,$what,$coursehome)=@_;
1600: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1601: }
1602:
1603: sub courseiddump {
1604: my ($domfilter,$descfilter,$sincefilter)=@_;
1605: my %returnhash=();
1606: unless ($domfilter) { $domfilter=''; }
1607: foreach my $tryserver (keys %libserv) {
1608: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1609: foreach (
1610: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1611: $sincefilter.':'.&escape($descfilter),
1612: $tryserver))) {
1613: my ($key,$value)=split(/\=/,$_);
1614: if (($key) && ($value)) {
1615: $returnhash{&unescape($key)}=&unescape($value);
1616: }
1617: }
1618:
1619: }
1620: }
1621: return %returnhash;
1622: }
1623:
1624: #
1625: # ----------------------------------------------------------- Check out an item
1626:
1627: sub checkout {
1628: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1629: my $now=time;
1630: my $lonhost=$perlvar{'lonHostID'};
1631: my $infostr=&escape(
1632: 'CHECKOUTTOKEN&'.
1633: $tuname.'&'.
1634: $tudom.'&'.
1635: $tcrsid.'&'.
1636: $symb.'&'.
1637: $now.'&'.$ENV{'REMOTE_ADDR'});
1638: my $token=&reply('tmpput:'.$infostr,$lonhost);
1639: if ($token=~/^error\:/) {
1640: &logthis("<font color=blue>WARNING: ".
1641: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1642: "</font>");
1643: return '';
1644: }
1645:
1646: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1647: $token=~tr/a-z/A-Z/;
1648:
1649: my %infohash=('resource.0.outtoken' => $token,
1650: 'resource.0.checkouttime' => $now,
1651: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1652:
1653: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1654: return '';
1655: } else {
1656: &logthis("<font color=blue>WARNING: ".
1657: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1658: "</font>");
1659: }
1660:
1661: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1662: &escape('Checkout '.$infostr.' - '.
1663: $token)) ne 'ok') {
1664: return '';
1665: } else {
1666: &logthis("<font color=blue>WARNING: ".
1667: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1668: "</font>");
1669: }
1670: return $token;
1671: }
1672:
1673: # ------------------------------------------------------------ Check in an item
1674:
1675: sub checkin {
1676: my $token=shift;
1677: my $now=time;
1678: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1679: $lonhost=~tr/A-Z/a-z/;
1680: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1681: $dtoken=~s/\W/\_/g;
1682: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1683: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1684:
1685: unless (($tuname) && ($tudom)) {
1686: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1687: return '';
1688: }
1689:
1690: unless (&allowed('mgr',$tcrsid)) {
1691: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1692: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1693: return '';
1694: }
1695:
1696: my %infohash=('resource.0.intoken' => $token,
1697: 'resource.0.checkintime' => $now,
1698: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1699:
1700: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1701: return '';
1702: }
1703:
1704: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1705: &escape('Checkin - '.$token)) ne 'ok') {
1706: return '';
1707: }
1708:
1709: return ($symb,$tuname,$tudom,$tcrsid);
1710: }
1711:
1712: # --------------------------------------------- Set Expire Date for Spreadsheet
1713:
1714: sub expirespread {
1715: my ($uname,$udom,$stype,$usymb)=@_;
1716: my $cid=$ENV{'request.course.id'};
1717: if ($cid) {
1718: my $now=time;
1719: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1720: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1721: $ENV{'course.'.$cid.'.num'}.
1722: ':nohist_expirationdates:'.
1723: &escape($key).'='.$now,
1724: $ENV{'course.'.$cid.'.home'})
1725: }
1726: return 'ok';
1727: }
1728:
1729: # ----------------------------------------------------- Devalidate Spreadsheets
1730:
1731: sub devalidate {
1732: my ($symb,$uname,$udom)=@_;
1733: my $cid=$ENV{'request.course.id'};
1734: if ($cid) {
1735: # delete the stored spreadsheets for
1736: # - the student level sheet of this user in course's homespace
1737: # - the assessment level sheet for this resource
1738: # for this user in user's homespace
1739: my $key=$uname.':'.$udom.':';
1740: my $status=
1741: &del('nohist_calculatedsheets',
1742: [$key.'studentcalc:'],
1743: $ENV{'course.'.$cid.'.domain'},
1744: $ENV{'course.'.$cid.'.num'})
1745: .' '.
1746: &del('nohist_calculatedsheets_'.$cid,
1747: [$key.'assesscalc:'.$symb],$udom,$uname);
1748: unless ($status eq 'ok ok') {
1749: &logthis('Could not devalidate spreadsheet '.
1750: $uname.' at '.$udom.' for '.
1751: $symb.': '.$status);
1752: }
1753: }
1754: }
1755:
1756: sub get_scalar {
1757: my ($string,$end) = @_;
1758: my $value;
1759: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1760: $value = $1;
1761: } elsif ($$string =~ s/^([^&]*?)&//) {
1762: $value = $1;
1763: }
1764: return &unescape($value);
1765: }
1766:
1767: sub array2str {
1768: my (@array) = @_;
1769: my $result=&arrayref2str(\@array);
1770: $result=~s/^__ARRAY_REF__//;
1771: $result=~s/__END_ARRAY_REF__$//;
1772: return $result;
1773: }
1774:
1775: sub arrayref2str {
1776: my ($arrayref) = @_;
1777: my $result='__ARRAY_REF__';
1778: foreach my $elem (@$arrayref) {
1779: if(ref($elem) eq 'ARRAY') {
1780: $result.=&arrayref2str($elem).'&';
1781: } elsif(ref($elem) eq 'HASH') {
1782: $result.=&hashref2str($elem).'&';
1783: } elsif(ref($elem)) {
1784: #print("Got a ref of ".(ref($elem))." skipping.");
1785: } else {
1786: $result.=&escape($elem).'&';
1787: }
1788: }
1789: $result=~s/\&$//;
1790: $result .= '__END_ARRAY_REF__';
1791: return $result;
1792: }
1793:
1794: sub hash2str {
1795: my (%hash) = @_;
1796: my $result=&hashref2str(\%hash);
1797: $result=~s/^__HASH_REF__//;
1798: $result=~s/__END_HASH_REF__$//;
1799: return $result;
1800: }
1801:
1802: sub hashref2str {
1803: my ($hashref)=@_;
1804: my $result='__HASH_REF__';
1805: foreach (keys(%$hashref)) {
1806: if (ref($_) eq 'ARRAY') {
1807: $result.=&arrayref2str($_).'=';
1808: } elsif (ref($_) eq 'HASH') {
1809: $result.=&hashref2str($_).'=';
1810: } elsif (ref($_)) {
1811: $result.='=';
1812: #print("Got a ref of ".(ref($_))." skipping.");
1813: } else {
1814: if ($_) {$result.=&escape($_).'=';} else { last; }
1815: }
1816:
1817: if(ref($hashref->{$_}) eq 'ARRAY') {
1818: $result.=&arrayref2str($hashref->{$_}).'&';
1819: } elsif(ref($hashref->{$_}) eq 'HASH') {
1820: $result.=&hashref2str($hashref->{$_}).'&';
1821: } elsif(ref($hashref->{$_})) {
1822: $result.='&';
1823: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1824: } else {
1825: $result.=&escape($hashref->{$_}).'&';
1826: }
1827: }
1828: $result=~s/\&$//;
1829: $result .= '__END_HASH_REF__';
1830: return $result;
1831: }
1832:
1833: sub str2hash {
1834: my ($string)=@_;
1835: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1836: return %$hash;
1837: }
1838:
1839: sub str2hashref {
1840: my ($string) = @_;
1841:
1842: my %hash;
1843:
1844: if($string !~ /^__HASH_REF__/) {
1845: if (! ($string eq '' || !defined($string))) {
1846: $hash{'error'}='Not hash reference';
1847: }
1848: return (\%hash, $string);
1849: }
1850:
1851: $string =~ s/^__HASH_REF__//;
1852:
1853: while($string !~ /^__END_HASH_REF__/) {
1854: #key
1855: my $key='';
1856: if($string =~ /^__HASH_REF__/) {
1857: ($key, $string)=&str2hashref($string);
1858: if(defined($key->{'error'})) {
1859: $hash{'error'}='Bad data';
1860: return (\%hash, $string);
1861: }
1862: } elsif($string =~ /^__ARRAY_REF__/) {
1863: ($key, $string)=&str2arrayref($string);
1864: if($key->[0] eq 'Array reference error') {
1865: $hash{'error'}='Bad data';
1866: return (\%hash, $string);
1867: }
1868: } else {
1869: $string =~ s/^(.*?)=//;
1870: $key=&unescape($1);
1871: }
1872: $string =~ s/^=//;
1873:
1874: #value
1875: my $value='';
1876: if($string =~ /^__HASH_REF__/) {
1877: ($value, $string)=&str2hashref($string);
1878: if(defined($value->{'error'})) {
1879: $hash{'error'}='Bad data';
1880: return (\%hash, $string);
1881: }
1882: } elsif($string =~ /^__ARRAY_REF__/) {
1883: ($value, $string)=&str2arrayref($string);
1884: if($value->[0] eq 'Array reference error') {
1885: $hash{'error'}='Bad data';
1886: return (\%hash, $string);
1887: }
1888: } else {
1889: $value=&get_scalar(\$string,'__END_HASH_REF__');
1890: }
1891: $string =~ s/^&//;
1892:
1893: $hash{$key}=$value;
1894: }
1895:
1896: $string =~ s/^__END_HASH_REF__//;
1897:
1898: return (\%hash, $string);
1899: }
1900:
1901: sub str2array {
1902: my ($string)=@_;
1903: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1904: return @$array;
1905: }
1906:
1907: sub str2arrayref {
1908: my ($string) = @_;
1909: my @array;
1910:
1911: if($string !~ /^__ARRAY_REF__/) {
1912: if (! ($string eq '' || !defined($string))) {
1913: $array[0]='Array reference error';
1914: }
1915: return (\@array, $string);
1916: }
1917:
1918: $string =~ s/^__ARRAY_REF__//;
1919:
1920: while($string !~ /^__END_ARRAY_REF__/) {
1921: my $value='';
1922: if($string =~ /^__HASH_REF__/) {
1923: ($value, $string)=&str2hashref($string);
1924: if(defined($value->{'error'})) {
1925: $array[0] ='Array reference error';
1926: return (\@array, $string);
1927: }
1928: } elsif($string =~ /^__ARRAY_REF__/) {
1929: ($value, $string)=&str2arrayref($string);
1930: if($value->[0] eq 'Array reference error') {
1931: $array[0] ='Array reference error';
1932: return (\@array, $string);
1933: }
1934: } else {
1935: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1936: }
1937: $string =~ s/^&//;
1938:
1939: push(@array, $value);
1940: }
1941:
1942: $string =~ s/^__END_ARRAY_REF__//;
1943:
1944: return (\@array, $string);
1945: }
1946:
1947: # -------------------------------------------------------------------Temp Store
1948:
1949: sub tmpreset {
1950: my ($symb,$namespace,$domain,$stuname) = @_;
1951: if (!$symb) {
1952: $symb=&symbread();
1953: if (!$symb) { $symb= $ENV{'request.url'}; }
1954: }
1955: $symb=escape($symb);
1956:
1957: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1958: $namespace=~s/\//\_/g;
1959: $namespace=~s/\W//g;
1960:
1961: #FIXME needs to do something for /pub resources
1962: if (!$domain) { $domain=$ENV{'user.domain'}; }
1963: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1964: my $path=$perlvar{'lonDaemons'}.'/tmp';
1965: my %hash;
1966: if (tie(%hash,'GDBM_File',
1967: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1968: &GDBM_WRCREAT(),0640)) {
1969: foreach my $key (keys %hash) {
1970: if ($key=~ /:$symb/) {
1971: delete($hash{$key});
1972: }
1973: }
1974: }
1975: }
1976:
1977: sub tmpstore {
1978: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1979:
1980: if (!$symb) {
1981: $symb=&symbread();
1982: if (!$symb) { $symb= $ENV{'request.url'}; }
1983: }
1984: $symb=escape($symb);
1985:
1986: if (!$namespace) {
1987: # I don't think we would ever want to store this for a course.
1988: # it seems this will only be used if we don't have a course.
1989: #$namespace=$ENV{'request.course.id'};
1990: #if (!$namespace) {
1991: $namespace=$ENV{'request.state'};
1992: #}
1993: }
1994: $namespace=~s/\//\_/g;
1995: $namespace=~s/\W//g;
1996: #FIXME needs to do something for /pub resources
1997: if (!$domain) { $domain=$ENV{'user.domain'}; }
1998: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1999: my $now=time;
2000: my %hash;
2001: my $path=$perlvar{'lonDaemons'}.'/tmp';
2002: if (tie(%hash,'GDBM_File',
2003: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2004: &GDBM_WRCREAT(),0640)) {
2005: $hash{"version:$symb"}++;
2006: my $version=$hash{"version:$symb"};
2007: my $allkeys='';
2008: foreach my $key (keys(%$storehash)) {
2009: $allkeys.=$key.':';
2010: $hash{"$version:$symb:$key"}=$$storehash{$key};
2011: }
2012: $hash{"$version:$symb:timestamp"}=$now;
2013: $allkeys.='timestamp';
2014: $hash{"$version:keys:$symb"}=$allkeys;
2015: if (untie(%hash)) {
2016: return 'ok';
2017: } else {
2018: return "error:$!";
2019: }
2020: } else {
2021: return "error:$!";
2022: }
2023: }
2024:
2025: # -----------------------------------------------------------------Temp Restore
2026:
2027: sub tmprestore {
2028: my ($symb,$namespace,$domain,$stuname) = @_;
2029:
2030: if (!$symb) {
2031: $symb=&symbread();
2032: if (!$symb) { $symb= $ENV{'request.url'}; }
2033: }
2034: $symb=escape($symb);
2035:
2036: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2037: #FIXME needs to do something for /pub resources
2038: if (!$domain) { $domain=$ENV{'user.domain'}; }
2039: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2040:
2041: my %returnhash;
2042: $namespace=~s/\//\_/g;
2043: $namespace=~s/\W//g;
2044: my %hash;
2045: my $path=$perlvar{'lonDaemons'}.'/tmp';
2046: if (tie(%hash,'GDBM_File',
2047: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2048: &GDBM_READER(),0640)) {
2049: my $version=$hash{"version:$symb"};
2050: $returnhash{'version'}=$version;
2051: my $scope;
2052: for ($scope=1;$scope<=$version;$scope++) {
2053: my $vkeys=$hash{"$scope:keys:$symb"};
2054: my @keys=split(/:/,$vkeys);
2055: my $key;
2056: $returnhash{"$scope:keys"}=$vkeys;
2057: foreach $key (@keys) {
2058: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
2059: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
2060: }
2061: }
2062: if (!(untie(%hash))) {
2063: return "error:$!";
2064: }
2065: } else {
2066: return "error:$!";
2067: }
2068: return %returnhash;
2069: }
2070:
2071: # ----------------------------------------------------------------------- Store
2072:
2073: sub store {
2074: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2075: my $home='';
2076:
2077: if ($stuname) { $home=&homeserver($stuname,$domain); }
2078:
2079: $symb=&symbclean($symb);
2080: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2081:
2082: if (!$domain) { $domain=$ENV{'user.domain'}; }
2083: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2084:
2085: &devalidate($symb,$stuname,$domain);
2086:
2087: $symb=escape($symb);
2088: if (!$namespace) {
2089: unless ($namespace=$ENV{'request.course.id'}) {
2090: return '';
2091: }
2092: }
2093: if (!$home) { $home=$ENV{'user.home'}; }
2094:
2095: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2096: $$storehash{'host'}=$perlvar{'lonHostID'};
2097:
2098: my $namevalue='';
2099: foreach (keys %$storehash) {
2100: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2101: }
2102: $namevalue=~s/\&$//;
2103: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2104: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2105: }
2106:
2107: # -------------------------------------------------------------- Critical Store
2108:
2109: sub cstore {
2110: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2111: my $home='';
2112:
2113: if ($stuname) { $home=&homeserver($stuname,$domain); }
2114:
2115: $symb=&symbclean($symb);
2116: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2117:
2118: if (!$domain) { $domain=$ENV{'user.domain'}; }
2119: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2120:
2121: &devalidate($symb,$stuname,$domain);
2122:
2123: $symb=escape($symb);
2124: if (!$namespace) {
2125: unless ($namespace=$ENV{'request.course.id'}) {
2126: return '';
2127: }
2128: }
2129: if (!$home) { $home=$ENV{'user.home'}; }
2130:
2131: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2132: $$storehash{'host'}=$perlvar{'lonHostID'};
2133:
2134: my $namevalue='';
2135: foreach (keys %$storehash) {
2136: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2137: }
2138: $namevalue=~s/\&$//;
2139: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2140: return critical
2141: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2142: }
2143:
2144: # --------------------------------------------------------------------- Restore
2145:
2146: sub restore {
2147: my ($symb,$namespace,$domain,$stuname) = @_;
2148: my $home='';
2149:
2150: if ($stuname) { $home=&homeserver($stuname,$domain); }
2151:
2152: if (!$symb) {
2153: unless ($symb=escape(&symbread())) { return ''; }
2154: } else {
2155: $symb=&escape(&symbclean($symb));
2156: }
2157: if (!$namespace) {
2158: unless ($namespace=$ENV{'request.course.id'}) {
2159: return '';
2160: }
2161: }
2162: if (!$domain) { $domain=$ENV{'user.domain'}; }
2163: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2164: if (!$home) { $home=$ENV{'user.home'}; }
2165: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2166:
2167: my %returnhash=();
2168: foreach (split(/\&/,$answer)) {
2169: my ($name,$value)=split(/\=/,$_);
2170: $returnhash{&unescape($name)}=&unescape($value);
2171: }
2172: my $version;
2173: for ($version=1;$version<=$returnhash{'version'};$version++) {
2174: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2175: $returnhash{$_}=$returnhash{$version.':'.$_};
2176: }
2177: }
2178: return %returnhash;
2179: }
2180:
2181: # ---------------------------------------------------------- Course Description
2182:
2183: sub coursedescription {
2184: my $courseid=shift;
2185: $courseid=~s/^\///;
2186: $courseid=~s/\_/\//g;
2187: my ($cdomain,$cnum)=split(/\//,$courseid);
2188: my $chome=&homeserver($cnum,$cdomain);
2189: my $normalid=$cdomain.'_'.$cnum;
2190: # need to always cache even if we get errors otherwise we keep
2191: # trying and trying and trying to get the course description.
2192: my %envhash=();
2193: my %returnhash=();
2194: $envhash{'course.'.$normalid.'.last_cache'}=time;
2195: if ($chome ne 'no_host') {
2196: %returnhash=&dump('environment',$cdomain,$cnum);
2197: if (!exists($returnhash{'con_lost'})) {
2198: $returnhash{'home'}= $chome;
2199: $returnhash{'domain'} = $cdomain;
2200: $returnhash{'num'} = $cnum;
2201: while (my ($name,$value) = each %returnhash) {
2202: $envhash{'course.'.$normalid.'.'.$name}=$value;
2203: }
2204: $returnhash{'url'}=&clutter($returnhash{'url'});
2205: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2206: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
2207: $envhash{'course.'.$normalid.'.home'}=$chome;
2208: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2209: $envhash{'course.'.$normalid.'.num'}=$cnum;
2210: }
2211: }
2212: &appenv(%envhash);
2213: return %returnhash;
2214: }
2215:
2216: # -------------------------------------------------See if a user is privileged
2217:
2218: sub privileged {
2219: my ($username,$domain)=@_;
2220: my $rolesdump=&reply("dump:$domain:$username:roles",
2221: &homeserver($username,$domain));
2222: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2223: my $now=time;
2224: if ($rolesdump ne '') {
2225: foreach (split(/&/,$rolesdump)) {
2226: if ($_!~/^rolesdef\&/) {
2227: my ($area,$role)=split(/=/,$_);
2228: $area=~s/\_\w\w$//;
2229: my ($trole,$tend,$tstart)=split(/_/,$role);
2230: if (($trole eq 'dc') || ($trole eq 'su')) {
2231: my $active=1;
2232: if ($tend) {
2233: if ($tend<$now) { $active=0; }
2234: }
2235: if ($tstart) {
2236: if ($tstart>$now) { $active=0; }
2237: }
2238: if ($active) { return 1; }
2239: }
2240: }
2241: }
2242: }
2243: return 0;
2244: }
2245:
2246: # -------------------------------------------------------- Get user privileges
2247:
2248: sub rolesinit {
2249: my ($domain,$username,$authhost)=@_;
2250: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2251: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2252: my %allroles=();
2253: my %thesepriv=();
2254: my $now=time;
2255: my $userroles="user.login.time=$now\n";
2256: my $thesestr;
2257:
2258: if ($rolesdump ne '') {
2259: foreach (split(/&/,$rolesdump)) {
2260: if ($_!~/^rolesdef\&/) {
2261: my ($area,$role)=split(/=/,$_);
2262: $area=~s/\_\w\w$//;
2263: my ($trole,$tend,$tstart)=split(/_/,$role);
2264: $userroles.='user.role.'.$trole.'.'.$area.'='.
2265: $tstart.'.'.$tend."\n";
2266: # log the associated role with the area
2267: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2268: if ($tend!=0) {
2269: if ($tend<$now) {
2270: $trole='';
2271: }
2272: }
2273: if ($tstart!=0) {
2274: if ($tstart>$now) {
2275: $trole='';
2276: }
2277: }
2278: if (($area ne '') && ($trole ne '')) {
2279: my $spec=$trole.'.'.$area;
2280: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2281: if ($trole =~ /^cr\//) {
2282: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2283: my $homsvr=homeserver($rauthor,$rdomain);
2284: if ($hostname{$homsvr} ne '') {
2285: my ($rdummy,$roledef)=
2286: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2287:
2288: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2289: my ($syspriv,$dompriv,$coursepriv)=
2290: split(/\_/,$roledef);
2291: if (defined($syspriv)) {
2292: $allroles{'cm./'}.=':'.$syspriv;
2293: $allroles{$spec.'./'}.=':'.$syspriv;
2294: }
2295: if ($tdomain ne '') {
2296: if (defined($dompriv)) {
2297: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2298: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2299: }
2300: if ($trest ne '') {
2301: if (defined($coursepriv)) {
2302: $allroles{'cm.'.$area}.=':'.$coursepriv;
2303: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
2304: }
2305: }
2306: }
2307: }
2308: }
2309: } else {
2310: if (defined($pr{$trole.':s'})) {
2311: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
2312: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2313: }
2314: if ($tdomain ne '') {
2315: if (defined($pr{$trole.':d'})) {
2316: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2317: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2318: }
2319: if ($trest ne '') {
2320: if (defined($pr{$trole.':c'})) {
2321: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2322: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2323: }
2324: }
2325: }
2326: }
2327: }
2328: }
2329: }
2330: my $adv=0;
2331: my $author=0;
2332: foreach (keys %allroles) {
2333: %thesepriv=();
2334: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
2335: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2336: foreach (split(/:/,$allroles{$_})) {
2337: if ($_ ne '') {
2338: my ($privilege,$restrictions)=split(/&/,$_);
2339: if ($restrictions eq '') {
2340: $thesepriv{$privilege}='F';
2341: } else {
2342: if ($thesepriv{$privilege} ne 'F') {
2343: $thesepriv{$privilege}.=$restrictions;
2344: }
2345: }
2346: }
2347: }
2348: $thesestr='';
2349: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2350: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
2351: }
2352: $userroles.='user.adv='.$adv."\n".
2353: 'user.author='.$author."\n";
2354: $ENV{'user.adv'}=$adv;
2355: }
2356: return $userroles;
2357: }
2358:
2359: # --------------------------------------------------------------- get interface
2360:
2361: sub get {
2362: my ($namespace,$storearr,$udomain,$uname)=@_;
2363: my $items='';
2364: foreach (@$storearr) {
2365: $items.=escape($_).'&';
2366: }
2367: $items=~s/\&$//;
2368: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2369: if (!$uname) { $uname=$ENV{'user.name'}; }
2370: my $uhome=&homeserver($uname,$udomain);
2371:
2372: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2373: my @pairs=split(/\&/,$rep);
2374: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2375: return @pairs;
2376: }
2377: my %returnhash=();
2378: my $i=0;
2379: foreach (@$storearr) {
2380: $returnhash{$_}=unescape($pairs[$i]);
2381: $i++;
2382: }
2383: return %returnhash;
2384: }
2385:
2386: # --------------------------------------------------------------- del interface
2387:
2388: sub del {
2389: my ($namespace,$storearr,$udomain,$uname)=@_;
2390: my $items='';
2391: foreach (@$storearr) {
2392: $items.=escape($_).'&';
2393: }
2394: $items=~s/\&$//;
2395: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2396: if (!$uname) { $uname=$ENV{'user.name'}; }
2397: my $uhome=&homeserver($uname,$udomain);
2398:
2399: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2400: }
2401:
2402: # -------------------------------------------------------------- dump interface
2403:
2404: sub dump {
2405: my ($namespace,$udomain,$uname,$regexp)=@_;
2406: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2407: if (!$uname) { $uname=$ENV{'user.name'}; }
2408: my $uhome=&homeserver($uname,$udomain);
2409: if ($regexp) {
2410: $regexp=&escape($regexp);
2411: } else {
2412: $regexp='.';
2413: }
2414: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2415: my @pairs=split(/\&/,$rep);
2416: my %returnhash=();
2417: foreach (@pairs) {
2418: my ($key,$value)=split(/=/,$_);
2419: $returnhash{unescape($key)}=unescape($value);
2420: }
2421: return %returnhash;
2422: }
2423:
2424: # -------------------------------------------------------------- keys interface
2425:
2426: sub getkeys {
2427: my ($namespace,$udomain,$uname)=@_;
2428: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2429: if (!$uname) { $uname=$ENV{'user.name'}; }
2430: my $uhome=&homeserver($uname,$udomain);
2431: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2432: my @keyarray=();
2433: foreach (split(/\&/,$rep)) {
2434: push (@keyarray,&unescape($_));
2435: }
2436: return @keyarray;
2437: }
2438:
2439: # --------------------------------------------------------------- currentdump
2440: sub currentdump {
2441: my ($courseid,$sdom,$sname)=@_;
2442: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2443: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2444: $sname = $ENV{'user.name'} if (! defined($sname));
2445: my $uhome = &homeserver($sname,$sdom);
2446: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2447: return if ($rep =~ /^(error:|no_such_host)/);
2448: #
2449: my %returnhash=();
2450: #
2451: if ($rep eq "unknown_cmd") {
2452: # an old lond will not know currentdump
2453: # Do a dump and make it look like a currentdump
2454: my @tmp = &dump($courseid,$sdom,$sname,'.');
2455: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2456: my %hash = @tmp;
2457: @tmp=();
2458: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2459: } else {
2460: my @pairs=split(/\&/,$rep);
2461: foreach (@pairs) {
2462: my ($key,$value)=split(/=/,$_);
2463: my ($symb,$param) = split(/:/,$key);
2464: $returnhash{&unescape($symb)}->{&unescape($param)} =
2465: &unescape($value);
2466: }
2467: }
2468: return %returnhash;
2469: }
2470:
2471: sub convert_dump_to_currentdump{
2472: my %hash = %{shift()};
2473: my %returnhash;
2474: # Code ripped from lond, essentially. The only difference
2475: # here is the unescaping done by lonnet::dump(). Conceivably
2476: # we might run in to problems with parameter names =~ /^v\./
2477: while (my ($key,$value) = each(%hash)) {
2478: my ($v,$symb,$param) = split(/:/,$key);
2479: next if ($v eq 'version' || $symb eq 'keys');
2480: next if (exists($returnhash{$symb}) &&
2481: exists($returnhash{$symb}->{$param}) &&
2482: $returnhash{$symb}->{'v.'.$param} > $v);
2483: $returnhash{$symb}->{$param}=$value;
2484: $returnhash{$symb}->{'v.'.$param}=$v;
2485: }
2486: #
2487: # Remove all of the keys in the hashes which keep track of
2488: # the version of the parameter.
2489: while (my ($symb,$param_hash) = each(%returnhash)) {
2490: # use a foreach because we are going to delete from the hash.
2491: foreach my $key (keys(%$param_hash)) {
2492: delete($param_hash->{$key}) if ($key =~ /^v\./);
2493: }
2494: }
2495: return \%returnhash;
2496: }
2497:
2498: # --------------------------------------------------------------- inc interface
2499:
2500: sub inc {
2501: my ($namespace,$store,$udomain,$uname) = @_;
2502: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2503: if (!$uname) { $uname=$ENV{'user.name'}; }
2504: my $uhome=&homeserver($uname,$udomain);
2505: my $items='';
2506: if (! ref($store)) {
2507: # got a single value, so use that instead
2508: $items = &escape($store).'=&';
2509: } elsif (ref($store) eq 'SCALAR') {
2510: $items = &escape($$store).'=&';
2511: } elsif (ref($store) eq 'ARRAY') {
2512: $items = join('=&',map {&escape($_);} @{$store});
2513: } elsif (ref($store) eq 'HASH') {
2514: while (my($key,$value) = each(%{$store})) {
2515: $items.= &escape($key).'='.&escape($value).'&';
2516: }
2517: }
2518: $items=~s/\&$//;
2519: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2520: }
2521:
2522: # --------------------------------------------------------------- put interface
2523:
2524: sub put {
2525: my ($namespace,$storehash,$udomain,$uname)=@_;
2526: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2527: if (!$uname) { $uname=$ENV{'user.name'}; }
2528: my $uhome=&homeserver($uname,$udomain);
2529: my $items='';
2530: foreach (keys %$storehash) {
2531: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
2532: }
2533: $items=~s/\&$//;
2534: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2535: }
2536:
2537: # ------------------------------------------------------ critical put interface
2538:
2539: sub cput {
2540: my ($namespace,$storehash,$udomain,$uname)=@_;
2541: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2542: if (!$uname) { $uname=$ENV{'user.name'}; }
2543: my $uhome=&homeserver($uname,$udomain);
2544: my $items='';
2545: foreach (keys %$storehash) {
2546: $items.=escape($_).'='.escape($$storehash{$_}).'&';
2547: }
2548: $items=~s/\&$//;
2549: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2550: }
2551:
2552: # -------------------------------------------------------------- eget interface
2553:
2554: sub eget {
2555: my ($namespace,$storearr,$udomain,$uname)=@_;
2556: my $items='';
2557: foreach (@$storearr) {
2558: $items.=escape($_).'&';
2559: }
2560: $items=~s/\&$//;
2561: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2562: if (!$uname) { $uname=$ENV{'user.name'}; }
2563: my $uhome=&homeserver($uname,$udomain);
2564: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2565: my @pairs=split(/\&/,$rep);
2566: my %returnhash=();
2567: my $i=0;
2568: foreach (@$storearr) {
2569: $returnhash{$_}=unescape($pairs[$i]);
2570: $i++;
2571: }
2572: return %returnhash;
2573: }
2574:
2575: # ---------------------------------------------- Custom access rule evaluation
2576:
2577: sub customaccess {
2578: my ($priv,$uri)=@_;
2579: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2580: $urealm=~s/^\W//;
2581: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2582: my $access=0;
2583: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2584: my ($effect,$realm,$role)=split(/\:/,$_);
2585: if ($role) {
2586: if ($role ne $urole) { next; }
2587: }
2588: foreach (split(/\s*\,\s*/,$realm)) {
2589: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2590: if ($tdom) {
2591: if ($tdom ne $udom) { next; }
2592: }
2593: if ($tcrs) {
2594: if ($tcrs ne $ucrs) { next; }
2595: }
2596: if ($tsec) {
2597: if ($tsec ne $usec) { next; }
2598: }
2599: $access=($effect eq 'allow');
2600: last;
2601: }
2602: if ($realm eq '' && $role eq '') {
2603: $access=($effect eq 'allow');
2604: }
2605: }
2606: return $access;
2607: }
2608:
2609: # ------------------------------------------------- Check for a user privilege
2610:
2611: sub allowed {
2612: my ($priv,$uri)=@_;
2613: $uri=&deversion($uri);
2614: my $orguri=$uri;
2615: $uri=&declutter($uri);
2616:
2617: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
2618: # Free bre access to adm and meta resources
2619:
2620: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2621: return 'F';
2622: }
2623:
2624: # Free bre to public access
2625:
2626: if ($priv eq 'bre') {
2627: my $copyright=&metadata($uri,'copyright');
2628: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2629: return 'F';
2630: }
2631: if ($copyright eq 'priv') {
2632: $uri=~/([^\/]+)\/([^\/]+)\//;
2633: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2634: return '';
2635: }
2636: }
2637: if ($copyright eq 'domain') {
2638: $uri=~/([^\/]+)\/([^\/]+)\//;
2639: unless (($ENV{'user.domain'} eq $1) ||
2640: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2641: return '';
2642: }
2643: }
2644: if ($ENV{'request.role'}=~ /li\.\//) {
2645: # Library role, so allow browsing of resources in this domain.
2646: return 'F';
2647: }
2648: if ($copyright eq 'custom') {
2649: unless (&customaccess($priv,$uri)) { return ''; }
2650: }
2651: }
2652: # Domain coordinator is trying to create a course
2653: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2654: # uri is the requested domain in this case.
2655: # comparison to 'request.role.domain' shows if the user has selected
2656: # a role of dc for the domain in question.
2657: return 'F' if ($uri eq $ENV{'request.role.domain'});
2658: }
2659:
2660: my $thisallowed='';
2661: my $statecond=0;
2662: my $courseprivid='';
2663:
2664: # Course
2665:
2666: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
2667: $thisallowed.=$1;
2668: }
2669:
2670: # Domain
2671:
2672: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2673: =~/\Q$priv\E\&([^\:]*)/) {
2674: $thisallowed.=$1;
2675: }
2676:
2677: # Course: uri itself is a course
2678: my $courseuri=$uri;
2679: $courseuri=~s/\_(\d)/\/$1/;
2680: $courseuri=~s/^([^\/])/\/$1/;
2681:
2682: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2683: =~/\Q$priv\E\&([^\:]*)/) {
2684: $thisallowed.=$1;
2685: }
2686:
2687: # URI is an uploaded document for this course
2688:
2689: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
2690: my $refuri=$ENV{'httpref.'.$orguri};
2691: if ($refuri) {
2692: if ($refuri =~ m|^/adm/|) {
2693: $thisallowed='F';
2694: }
2695: }
2696: }
2697:
2698: # Full access at system, domain or course-wide level? Exit.
2699:
2700: if ($thisallowed=~/F/) {
2701: return 'F';
2702: }
2703:
2704: # If this is generating or modifying users, exit with special codes
2705:
2706: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:\Q$priv\E\:/) {
2707: return $thisallowed;
2708: }
2709: #
2710: # Gathered so far: system, domain and course wide privileges
2711: #
2712: # Course: See if uri or referer is an individual resource that is part of
2713: # the course
2714:
2715: if ($ENV{'request.course.id'}) {
2716:
2717: $courseprivid=$ENV{'request.course.id'};
2718: if ($ENV{'request.course.sec'}) {
2719: $courseprivid.='/'.$ENV{'request.course.sec'};
2720: }
2721: $courseprivid=~s/\_/\//;
2722: my $checkreferer=1;
2723: my ($match,$cond)=&is_on_map($uri);
2724: if ($match) {
2725: $statecond=$cond;
2726: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2727: =~/\Q$priv\E\&([^\:]*)/) {
2728: $thisallowed.=$1;
2729: $checkreferer=0;
2730: }
2731: }
2732:
2733: if ($checkreferer) {
2734: my $refuri=$ENV{'httpref.'.$orguri};
2735: unless ($refuri) {
2736: foreach (keys %ENV) {
2737: if ($_=~/^httpref\..*\*/) {
2738: my $pattern=$_;
2739: $pattern=~s/^httpref\.\/res\///;
2740: $pattern=~s/\*/\[\^\/\]\+/g;
2741: $pattern=~s/\//\\\//g;
2742: if ($orguri=~/$pattern/) {
2743: $refuri=$ENV{$_};
2744: }
2745: }
2746: }
2747: }
2748:
2749: if ($refuri) {
2750: $refuri=&declutter($refuri);
2751: my ($match,$cond)=&is_on_map($refuri);
2752: if ($match) {
2753: my $refstatecond=$cond;
2754: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2755: =~/\Q$priv\E\&([^\:]*)/) {
2756: $thisallowed.=$1;
2757: $uri=$refuri;
2758: $statecond=$refstatecond;
2759: }
2760: }
2761: }
2762: }
2763: }
2764:
2765: #
2766: # Gathered now: all privileges that could apply, and condition number
2767: #
2768: #
2769: # Full or no access?
2770: #
2771:
2772: if ($thisallowed=~/F/) {
2773: return 'F';
2774: }
2775:
2776: unless ($thisallowed) {
2777: return '';
2778: }
2779:
2780: # Restrictions exist, deal with them
2781: #
2782: # C:according to course preferences
2783: # R:according to resource settings
2784: # L:unless locked
2785: # X:according to user session state
2786: #
2787:
2788: # Possibly locked functionality, check all courses
2789: # Locks might take effect only after 10 minutes cache expiration for other
2790: # courses, and 2 minutes for current course
2791:
2792: my $envkey;
2793: if ($thisallowed=~/L/) {
2794: foreach $envkey (keys %ENV) {
2795: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2796: my $courseid=$2;
2797: my $roleid=$1.'.'.$2;
2798: $courseid=~s/^\///;
2799: my $expiretime=600;
2800: if ($ENV{'request.role'} eq $roleid) {
2801: $expiretime=120;
2802: }
2803: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2804: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2805: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2806: &coursedescription($courseid);
2807: }
2808: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
2809: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2810: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2811: &log($ENV{'user.domain'},$ENV{'user.name'},
2812: $ENV{'user.home'},
2813: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2814: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2815: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2816: return '';
2817: }
2818: }
2819: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
2820: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2821: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2822: &log($ENV{'user.domain'},$ENV{'user.name'},
2823: $ENV{'user.home'},
2824: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2825: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2826: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2827: return '';
2828: }
2829: }
2830: }
2831: }
2832: }
2833:
2834: #
2835: # Rest of the restrictions depend on selected course
2836: #
2837:
2838: unless ($ENV{'request.course.id'}) {
2839: return '1';
2840: }
2841:
2842: #
2843: # Now user is definitely in a course
2844: #
2845:
2846:
2847: # Course preferences
2848:
2849: if ($thisallowed=~/C/) {
2850: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2851: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2852: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2853: =~/\Q$rolecode\E/) {
2854: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2855: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2856: $ENV{'request.course.id'});
2857: return '';
2858: }
2859:
2860: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2861: =~/\Q$unamedom\E/) {
2862: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2863: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2864: $ENV{'request.course.id'});
2865: return '';
2866: }
2867: }
2868:
2869: # Resource preferences
2870:
2871: if ($thisallowed=~/R/) {
2872: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2873: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
2874: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2875: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2876: return '';
2877: }
2878: }
2879:
2880: # Restricted by state or randomout?
2881:
2882: if ($thisallowed=~/X/) {
2883: if ($ENV{'acc.randomout'}) {
2884: my $symb=&symbread($uri,1);
2885: if (($symb) && ($ENV{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
2886: return '';
2887: }
2888: }
2889: if (&condval($statecond)) {
2890: return '2';
2891: } else {
2892: return '';
2893: }
2894: }
2895:
2896: return 'F';
2897: }
2898:
2899: # --------------------------------------------------- Is a resource on the map?
2900:
2901: sub is_on_map {
2902: my $uri=&declutter(shift);
2903: $uri=~s/\.\d+\.(\w+)$/\.$1/;
2904: my @uriparts=split(/\//,$uri);
2905: my $filename=$uriparts[$#uriparts];
2906: my $pathname=$uri;
2907: $pathname=~s|/\Q$filename\E$||;
2908: $pathname=~s/^adm\/wrapper\///;
2909: #Trying to find the conditional for the file
2910: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2911: /\&\Q$filename\E\:([\d\|]+)\&/);
2912: if ($match) {
2913: return (1,$1);
2914: } else {
2915: return (0,0);
2916: }
2917: }
2918:
2919: # --------------------------------------------------------- Get symb from alias
2920:
2921: sub get_symb_from_alias {
2922: my $symb=shift;
2923: my ($map,$resid,$url)=&decode_symb($symb);
2924: # Already is a symb
2925: if ($url) { return $symb; }
2926: # Must be an alias
2927: my $aliassymb='';
2928: my %bighash;
2929: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2930: &GDBM_READER(),0640)) {
2931: my $rid=$bighash{'mapalias_'.$symb};
2932: if ($rid) {
2933: my ($mapid,$resid)=split(/\./,$rid);
2934: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
2935: $resid,$bighash{'src_'.$rid});
2936: }
2937: untie %bighash;
2938: }
2939: return $aliassymb;
2940: }
2941:
2942: # ----------------------------------------------------------------- Define Role
2943:
2944: sub definerole {
2945: if (allowed('mcr','/')) {
2946: my ($rolename,$sysrole,$domrole,$courole)=@_;
2947: foreach (split(':',$sysrole)) {
2948: my ($crole,$cqual)=split(/\&/,$_);
2949: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
2950: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
2951: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
2952: return "refused:s:$crole&$cqual";
2953: }
2954: }
2955: }
2956: foreach (split(':',$domrole)) {
2957: my ($crole,$cqual)=split(/\&/,$_);
2958: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
2959: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
2960: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
2961: return "refused:d:$crole&$cqual";
2962: }
2963: }
2964: }
2965: foreach (split(':',$courole)) {
2966: my ($crole,$cqual)=split(/\&/,$_);
2967: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
2968: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
2969: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
2970: return "refused:c:$crole&$cqual";
2971: }
2972: }
2973: }
2974: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2975: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2976: "rolesdef_$rolename=".
2977: escape($sysrole.'_'.$domrole.'_'.$courole);
2978: return reply($command,$ENV{'user.home'});
2979: } else {
2980: return 'refused';
2981: }
2982: }
2983:
2984: # ---------------- Make a metadata query against the network of library servers
2985:
2986: sub metadata_query {
2987: my ($query,$custom,$customshow,$server_array)=@_;
2988: my %rhash;
2989: my @server_list = (defined($server_array) ? @$server_array
2990: : keys(%libserv) );
2991: for my $server (@server_list) {
2992: unless ($custom or $customshow) {
2993: my $reply=&reply("querysend:".&escape($query),$server);
2994: $rhash{$server}=$reply;
2995: }
2996: else {
2997: my $reply=&reply("querysend:".&escape($query).':'.
2998: &escape($custom).':'.&escape($customshow),
2999: $server);
3000: $rhash{$server}=$reply;
3001: }
3002: }
3003: return \%rhash;
3004: }
3005:
3006: # ----------------------------------------- Send log queries and wait for reply
3007:
3008: sub log_query {
3009: my ($uname,$udom,$query,%filters)=@_;
3010: my $uhome=&homeserver($uname,$udom);
3011: if ($uhome eq 'no_host') { return 'error: no_host'; }
3012: my $uhost=$hostname{$uhome};
3013: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3014: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3015: $uhome);
3016: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3017: return get_query_reply($queryid);
3018: }
3019:
3020: sub get_query_reply {
3021: my $queryid=shift;
3022: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3023: my $reply='';
3024: for (1..100) {
3025: sleep 2;
3026: if (-e $replyfile.'.end') {
3027: if (open(my $fh,$replyfile)) {
3028: $reply.=<$fh>;
3029: close($fh);
3030: } else { return 'error: reply_file_error'; }
3031: return &unescape($reply);
3032: }
3033: }
3034: return 'timeout:'.$queryid;
3035: }
3036:
3037: sub courselog_query {
3038: #
3039: # possible filters:
3040: # url: url or symb
3041: # username
3042: # domain
3043: # action: view, submit, grade
3044: # start: timestamp
3045: # end: timestamp
3046: #
3047: my (%filters)=@_;
3048: unless ($ENV{'request.course.id'}) { return 'no_course'; }
3049: if ($filters{'url'}) {
3050: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3051: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3052: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3053: }
3054: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
3055: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
3056: return &log_query($cname,$cdom,'courselog',%filters);
3057: }
3058:
3059: sub userlog_query {
3060: my ($uname,$udom,%filters)=@_;
3061: return &log_query($uname,$udom,'userlog',%filters);
3062: }
3063:
3064: # ------------------------------------------------------------------ Plain Text
3065:
3066: sub plaintext {
3067: my $short=shift;
3068: return &mt($prp{$short});
3069: }
3070:
3071: # ----------------------------------------------------------------- Assign Role
3072:
3073: sub assignrole {
3074: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3075: my $mrole;
3076: if ($role =~ /^cr\//) {
3077: my $cwosec=$url;
3078: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3079: unless (&allowed('ccr',$cwosec)) {
3080: &logthis('Refused custom assignrole: '.
3081: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3082: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3083: return 'refused';
3084: }
3085: $mrole='cr';
3086: } else {
3087: my $cwosec=$url;
3088: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3089: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3090: &logthis('Refused assignrole: '.
3091: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3092: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3093: return 'refused';
3094: }
3095: $mrole=$role;
3096: }
3097: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3098: "$udom:$uname:$url".'_'."$mrole=$role";
3099: if ($end) { $command.='_'.$end; }
3100: if ($start) {
3101: if ($end) {
3102: $command.='_'.$start;
3103: } else {
3104: $command.='_0_'.$start;
3105: }
3106: }
3107: # actually delete
3108: if ($deleteflag) {
3109: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3110: # modify command to delete the role
3111: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
3112: "$udom:$uname:$url".'_'."$mrole";
3113: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
3114: # set start and finish to negative values for userrolelog
3115: $start=-1;
3116: $end=-1;
3117: }
3118: }
3119: # send command
3120: my $answer=&reply($command,&homeserver($uname,$udom));
3121: # log new user role if status is ok
3122: if ($answer eq 'ok') {
3123: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
3124: }
3125: return $answer;
3126: }
3127:
3128: # -------------------------------------------------- Modify user authentication
3129: # Overrides without validation
3130:
3131: sub modifyuserauth {
3132: my ($udom,$uname,$umode,$upass)=@_;
3133: my $uhome=&homeserver($uname,$udom);
3134: unless (&allowed('mau',$udom)) { return 'refused'; }
3135: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3136: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3137: ' in domain '.$ENV{'request.role.domain'});
3138: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3139: &escape($upass),$uhome);
3140: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
3141: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3142: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3143: &log($udom,,$uname,$uhome,
3144: 'Authentication changed by '.$ENV{'user.domain'}.', '.
3145: $ENV{'user.name'}.', '.$umode.
3146: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3147: unless ($reply eq 'ok') {
3148: &logthis('Authentication mode error: '.$reply);
3149: return 'error: '.$reply;
3150: }
3151: return 'ok';
3152: }
3153:
3154: # --------------------------------------------------------------- Modify a user
3155:
3156: sub modifyuser {
3157: my ($udom, $uname, $uid,
3158: $umode, $upass, $first,
3159: $middle, $last, $gene,
3160: $forceid, $desiredhome, $email)=@_;
3161: $udom=~s/\W//g;
3162: $uname=~s/\W//g;
3163: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3164: $umode.', '.$first.', '.$middle.', '.
3165: $last.', '.$gene.'(forceid: '.$forceid.')'.
3166: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3167: ' desiredhome not specified').
3168: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3169: ' in domain '.$ENV{'request.role.domain'});
3170: my $uhome=&homeserver($uname,$udom,'true');
3171: # ----------------------------------------------------------------- Create User
3172: if (($uhome eq 'no_host') &&
3173: (($umode && $upass) || ($umode eq 'localauth'))) {
3174: my $unhome='';
3175: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3176: $unhome = $desiredhome;
3177: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
3178: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
3179: } else { # load balancing routine for determining $unhome
3180: my $tryserver;
3181: my $loadm=10000000;
3182: foreach $tryserver (keys %libserv) {
3183: if ($hostdom{$tryserver} eq $udom) {
3184: my $answer=reply('load',$tryserver);
3185: if (($answer=~/\d+/) && ($answer<$loadm)) {
3186: $loadm=$answer;
3187: $unhome=$tryserver;
3188: }
3189: }
3190: }
3191: }
3192: if (($unhome eq '') || ($unhome eq 'no_host')) {
3193: return 'error: unable to find a home server for '.$uname.
3194: ' in domain '.$udom;
3195: }
3196: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3197: &escape($upass),$unhome);
3198: unless ($reply eq 'ok') {
3199: return 'error: '.$reply;
3200: }
3201: $uhome=&homeserver($uname,$udom,'true');
3202: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3203: return 'error: unable verify users home machine.';
3204: }
3205: } # End of creation of new user
3206: # ---------------------------------------------------------------------- Add ID
3207: if ($uid) {
3208: $uid=~tr/A-Z/a-z/;
3209: my %uidhash=&idrget($udom,$uname);
3210: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3211: && (!$forceid)) {
3212: unless ($uid eq $uidhash{$uname}) {
3213: return 'error: user id "'.$uid.'" does not match '.
3214: 'current user id "'.$uidhash{$uname}.'".';
3215: }
3216: } else {
3217: &idput($udom,($uname => $uid));
3218: }
3219: }
3220: # -------------------------------------------------------------- Add names, etc
3221: my @tmp=&get('environment',
3222: ['firstname','middlename','lastname','generation'],
3223: $udom,$uname);
3224: my %names;
3225: if ($tmp[0] =~ m/^error:.*/) {
3226: %names=();
3227: } else {
3228: %names = @tmp;
3229: }
3230: #
3231: # Make sure to not trash student environment if instructor does not bother
3232: # to supply name and email information
3233: #
3234: if ($first) { $names{'firstname'} = $first; }
3235: if (defined($middle)) { $names{'middlename'} = $middle; }
3236: if ($last) { $names{'lastname'} = $last; }
3237: if (defined($gene)) { $names{'generation'} = $gene; }
3238: if ($email) { $names{'notification'} = $email;
3239: $names{'critnotification'} = $email; }
3240:
3241: my $reply = &put('environment', \%names, $udom,$uname);
3242: if ($reply ne 'ok') { return 'error: '.$reply; }
3243: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
3244: $umode.', '.$first.', '.$middle.', '.
3245: $last.', '.$gene.' by '.
3246: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3247: return 'ok';
3248: }
3249:
3250: # -------------------------------------------------------------- Modify student
3251:
3252: sub modifystudent {
3253: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3254: $end,$start,$forceid,$desiredhome,$email,$type,$cid)=@_;
3255: if (!$cid) {
3256: unless ($cid=$ENV{'request.course.id'}) {
3257: return 'not_in_class';
3258: }
3259: }
3260: # --------------------------------------------------------------- Make the user
3261: my $reply=&modifyuser
3262: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
3263: $desiredhome,$email);
3264: unless ($reply eq 'ok') { return $reply; }
3265: # This will cause &modify_student_enrollment to get the uid from the
3266: # students environment
3267: $uid = undef if (!$forceid);
3268: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
3269: $gene,$usec,$end,$start,$type,$cid);
3270: return $reply;
3271: }
3272:
3273: sub modify_student_enrollment {
3274: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,
3275: $cid) = @_;
3276: my ($cdom,$cnum,$chome);
3277: if (!$cid) {
3278: unless ($cid=$ENV{'request.course.id'}) {
3279: return 'not_in_class';
3280: }
3281: $cdom=$ENV{'course.'.$cid.'.domain'};
3282: $cnum=$ENV{'course.'.$cid.'.num'};
3283: } else {
3284: ($cdom,$cnum)=split(/_/,$cid);
3285: }
3286: $chome=$ENV{'course.'.$cid.'.home'};
3287: if (!$chome) {
3288: $chome=&homeserver($cnum,$cdom);
3289: }
3290: if (!$chome) { return 'unknown_course'; }
3291: # Make sure the user exists
3292: my $uhome=&homeserver($uname,$udom);
3293: if (($uhome eq '') || ($uhome eq 'no_host')) {
3294: return 'error: no such user';
3295: }
3296: # Get student data if we were not given enough information
3297: if (!defined($first) || $first eq '' ||
3298: !defined($last) || $last eq '' ||
3299: !defined($uid) || $uid eq '' ||
3300: !defined($middle) || $middle eq '' ||
3301: !defined($gene) || $gene eq '') {
3302: # They did not supply us with enough data to enroll the student, so
3303: # we need to pick up more information.
3304: my %tmp = &get('environment',
3305: ['firstname','middlename','lastname', 'generation','id']
3306: ,$udom,$uname);
3307:
3308: #foreach (keys(%tmp)) {
3309: # &logthis("key $_ = ".$tmp{$_});
3310: #}
3311: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3312: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3313: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3314: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3315: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3316: }
3317: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
3318: $first,$middle);
3319: my $reply=cput('classlist',
3320: {"$uname:$udom" =>
3321: join(':',$end,$start,$uid,$usec,$fullname,$type) },
3322: $cdom,$cnum);
3323: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3324: return 'error: '.$reply;
3325: }
3326: # Add student role to user
3327: my $uurl='/'.$cid;
3328: $uurl=~s/\_/\//g;
3329: if ($usec) {
3330: $uurl.='/'.$usec;
3331: }
3332: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3333: }
3334:
3335: # ------------------------------------------------- Write to course preferences
3336:
3337: sub writecoursepref {
3338: my ($courseid,%prefs)=@_;
3339: $courseid=~s/^\///;
3340: $courseid=~s/\_/\//g;
3341: my ($cdomain,$cnum)=split(/\//,$courseid);
3342: my $chome=homeserver($cnum,$cdomain);
3343: if (($chome eq '') || ($chome eq 'no_host')) {
3344: return 'error: no such course';
3345: }
3346: my $cstring='';
3347: foreach (keys %prefs) {
3348: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3349: }
3350: $cstring=~s/\&$//;
3351: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3352: }
3353:
3354: # ---------------------------------------------------------- Make/modify course
3355:
3356: sub createcourse {
3357: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
3358: $url=&declutter($url);
3359: my $cid='';
3360: unless (&allowed('ccc',$udom)) {
3361: return 'refused';
3362: }
3363: # ------------------------------------------------------------------- Create ID
3364: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3365: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3366: # ----------------------------------------------- Make sure that does not exist
3367: my $uhome=&homeserver($uname,$udom,'true');
3368: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3369: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3370: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3371: $uhome=&homeserver($uname,$udom,'true');
3372: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3373: return 'error: unable to generate unique course-ID';
3374: }
3375: }
3376: # ------------------------------------------------ Check supplied server name
3377: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3378: if (! exists($libserv{$course_server})) {
3379: return 'error:bad server name '.$course_server;
3380: }
3381: # ------------------------------------------------------------- Make the course
3382: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3383: $course_server);
3384: unless ($reply eq 'ok') { return 'error: '.$reply; }
3385: $uhome=&homeserver($uname,$udom,'true');
3386: if (($uhome eq '') || ($uhome eq 'no_host')) {
3387: return 'error: no such course';
3388: }
3389: # ----------------------------------------------------------------- Course made
3390: # log existance
3391: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description),
3392: $uhome);
3393: &flushcourselogs();
3394: # set toplevel url
3395: my $topurl=$url;
3396: unless ($nonstandard) {
3397: # ------------------------------------------ For standard courses, make top url
3398: my $mapurl=&clutter($url);
3399: if ($mapurl eq '/res/') { $mapurl=''; }
3400: $ENV{'form.initmap'}=(<<ENDINITMAP);
3401: <map>
3402: <resource id="1" type="start"></resource>
3403: <resource id="2" src="$mapurl"></resource>
3404: <resource id="3" type="finish"></resource>
3405: <link index="1" from="1" to="2"></link>
3406: <link index="2" from="2" to="3"></link>
3407: </map>
3408: ENDINITMAP
3409: $topurl=&declutter(
3410: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3411: );
3412: }
3413: # ----------------------------------------------------------- Write preferences
3414: &writecoursepref($udom.'_'.$uname,
3415: ('description' => $description,
3416: 'url' => $topurl));
3417: return '/'.$udom.'/'.$uname;
3418: }
3419:
3420: # ---------------------------------------------------------- Assign Custom Role
3421:
3422: sub assigncustomrole {
3423: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3424: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3425: $end,$start,$deleteflag);
3426: }
3427:
3428: # ----------------------------------------------------------------- Revoke Role
3429:
3430: sub revokerole {
3431: my ($udom,$uname,$url,$role,$deleteflag)=@_;
3432: my $now=time;
3433: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
3434: }
3435:
3436: # ---------------------------------------------------------- Revoke Custom Role
3437:
3438: sub revokecustomrole {
3439: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
3440: my $now=time;
3441: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3442: $deleteflag);
3443: }
3444:
3445: # ------------------------------------------------------------ Directory lister
3446:
3447: sub dirlist {
3448: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3449:
3450: $uri=~s/^\///;
3451: $uri=~s/\/$//;
3452: my ($udom, $uname);
3453: (undef,$udom,$uname)=split(/\//,$uri);
3454: if(defined($userdomain)) {
3455: $udom = $userdomain;
3456: }
3457: if(defined($username)) {
3458: $uname = $username;
3459: }
3460:
3461: my $dirRoot = $perlvar{'lonDocRoot'};
3462: if(defined($alternateDirectoryRoot)) {
3463: $dirRoot = $alternateDirectoryRoot;
3464: $dirRoot =~ s/\/$//;
3465: }
3466:
3467: if($udom) {
3468: if($uname) {
3469: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
3470: homeserver($uname,$udom));
3471: return split(/:/,$listing);
3472: } elsif(!defined($alternateDirectoryRoot)) {
3473: my $tryserver;
3474: my %allusers=();
3475: foreach $tryserver (keys %libserv) {
3476: if($hostdom{$tryserver} eq $udom) {
3477: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3478: $udom, $tryserver);
3479: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
3480: && ($listing ne 'con_lost')) {
3481: foreach (split(/:/,$listing)) {
3482: my ($entry,@stat)=split(/&/,$_);
3483: $allusers{$entry}=1;
3484: }
3485: }
3486: }
3487: }
3488: my $alluserstr='';
3489: foreach (sort keys %allusers) {
3490: $alluserstr.=$_.'&user:';
3491: }
3492: $alluserstr=~s/:$//;
3493: return split(/:/,$alluserstr);
3494: } else {
3495: my @emptyResults = ();
3496: push(@emptyResults, 'missing user name');
3497: return split(':',@emptyResults);
3498: }
3499: } elsif(!defined($alternateDirectoryRoot)) {
3500: my $tryserver;
3501: my %alldom=();
3502: foreach $tryserver (keys %libserv) {
3503: $alldom{$hostdom{$tryserver}}=1;
3504: }
3505: my $alldomstr='';
3506: foreach (sort keys %alldom) {
3507: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
3508: }
3509: $alldomstr=~s/:$//;
3510: return split(/:/,$alldomstr);
3511: } else {
3512: my @emptyResults = ();
3513: push(@emptyResults, 'missing domain');
3514: return split(':',@emptyResults);
3515: }
3516: }
3517:
3518: # --------------------------------------------- GetFileTimestamp
3519: # This function utilizes dirlist and returns the date stamp for
3520: # when it was last modified. It will also return an error of -1
3521: # if an error occurs
3522:
3523: ##
3524: ## FIXME: This subroutine assumes its caller knows something about the
3525: ## directory structure of the home server for the student ($root).
3526: ## Not a good assumption to make. Since this is for looking up files
3527: ## in user directories, the full path should be constructed by lond, not
3528: ## whatever machine we request data from.
3529: ##
3530: sub GetFileTimestamp {
3531: my ($studentDomain,$studentName,$filename,$root)=@_;
3532: $studentDomain=~s/\W//g;
3533: $studentName=~s/\W//g;
3534: my $subdir=$studentName.'__';
3535: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3536: my $proname="$studentDomain/$subdir/$studentName";
3537: $proname .= '/'.$filename;
3538: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
3539: $studentName, $root);
3540: my @stats = split('&', $fileStat);
3541: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
3542: # @stats contains first the filename, then the stat output
3543: return $stats[10]; # so this is 10 instead of 9.
3544: } else {
3545: return -1;
3546: }
3547: }
3548:
3549: # -------------------------------------------------------- Value of a Condition
3550:
3551: sub directcondval {
3552: my $number=shift;
3553: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
3554: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
3555: } else {
3556: return 2;
3557: }
3558: }
3559:
3560: sub condval {
3561: my $condidx=shift;
3562: my $result=0;
3563: my $allpathcond='';
3564: foreach (split(/\|/,$condidx)) {
3565: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
3566: $allpathcond.=
3567: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
3568: }
3569: }
3570: $allpathcond=~s/\|$//;
3571: if ($ENV{'request.course.id'}) {
3572: if ($allpathcond) {
3573: my $operand='|';
3574: my @stack;
3575: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
3576: if ($_ eq '(') {
3577: push @stack,($operand,$result)
3578: } elsif ($_ eq ')') {
3579: my $before=pop @stack;
3580: if (pop @stack eq '&') {
3581: $result=$result>$before?$before:$result;
3582: } else {
3583: $result=$result>$before?$result:$before;
3584: }
3585: } elsif (($_ eq '&') || ($_ eq '|')) {
3586: $operand=$_;
3587: } else {
3588: my $new=directcondval($_);
3589: if ($operand eq '&') {
3590: $result=$result>$new?$new:$result;
3591: } else {
3592: $result=$result>$new?$result:$new;
3593: }
3594: }
3595: }
3596: }
3597: }
3598: return $result;
3599: }
3600:
3601: # ---------------------------------------------------- Devalidate courseresdata
3602:
3603: sub devalidatecourseresdata {
3604: my ($coursenum,$coursedomain)=@_;
3605: my $hashid=$coursenum.':'.$coursedomain;
3606: &devalidate_cache(\%courseresdatacache,$hashid,'courseres');
3607: }
3608:
3609: # --------------------------------------------------- Course Resourcedata Query
3610:
3611: sub courseresdata {
3612: my ($coursenum,$coursedomain,@which)=@_;
3613: my $coursehom=&homeserver($coursenum,$coursedomain);
3614: my $hashid=$coursenum.':'.$coursedomain;
3615: my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid,'courseres');
3616: unless (defined($cached)) {
3617: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
3618: $result=\%dumpreply;
3619: my ($tmp) = keys(%dumpreply);
3620: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
3621: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
3622: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3623: return $tmp;
3624: } elsif ($tmp =~ /^(error)/) {
3625: $result=undef;
3626: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
3627: }
3628: }
3629: foreach my $item (@which) {
3630: if (defined($result->{$item})) {
3631: return $result->{$item};
3632: }
3633: }
3634: return undef;
3635: }
3636:
3637: #
3638: # EXT resource caching routines
3639: #
3640:
3641: sub clear_EXT_cache_status {
3642: &delenv('cache.EXT.');
3643: }
3644:
3645: sub EXT_cache_status {
3646: my ($target_domain,$target_user) = @_;
3647: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3648: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
3649: # We know already the user has no data
3650: return 1;
3651: } else {
3652: return 0;
3653: }
3654: }
3655:
3656: sub EXT_cache_set {
3657: my ($target_domain,$target_user) = @_;
3658: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3659: &appenv($cachename => time);
3660: }
3661:
3662: # --------------------------------------------------------- Value of a Variable
3663: sub EXT {
3664: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
3665:
3666: unless ($varname) { return ''; }
3667: #get real user name/domain, courseid and symb
3668: my $courseid;
3669: my $publicuser;
3670: if ($symbparm) {
3671: $symbparm=&get_symb_from_alias($symbparm);
3672: }
3673: if (!($uname && $udom)) {
3674: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
3675: &Apache::lonxml::whichuser($symbparm);
3676: if (!$symbparm) { $symbparm=$cursymb; }
3677: } else {
3678: $courseid=$ENV{'request.course.id'};
3679: }
3680: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
3681: my $rest;
3682: if (defined($therest[0])) {
3683: $rest=join('.',@therest);
3684: } else {
3685: $rest='';
3686: }
3687:
3688: my $qualifierrest=$qualifier;
3689: if ($rest) { $qualifierrest.='.'.$rest; }
3690: my $spacequalifierrest=$space;
3691: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
3692: if ($realm eq 'user') {
3693: # --------------------------------------------------------------- user.resource
3694: if ($space eq 'resource') {
3695: if (defined($Apache::lonhomework::parsing_a_problem)) {
3696: return $Apache::lonhomework::history{$qualifierrest};
3697: } else {
3698: my %restored;
3699: if ($publicuser || $ENV{'request.state'} eq 'construct') {
3700: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
3701: } else {
3702: %restored=&restore($symbparm,$courseid,$udom,$uname);
3703: }
3704: return $restored{$qualifierrest};
3705: }
3706: # ----------------------------------------------------------------- user.access
3707: } elsif ($space eq 'access') {
3708: # FIXME - not supporting calls for a specific user
3709: return &allowed($qualifier,$rest);
3710: # ------------------------------------------ user.preferences, user.environment
3711: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
3712: if (($uname eq $ENV{'user.name'}) &&
3713: ($udom eq $ENV{'user.domain'})) {
3714: return $ENV{join('.',('environment',$qualifierrest))};
3715: } else {
3716: my %returnhash;
3717: if (!$publicuser) {
3718: %returnhash=&userenvironment($udom,$uname,
3719: $qualifierrest);
3720: }
3721: return $returnhash{$qualifierrest};
3722: }
3723: # ----------------------------------------------------------------- user.course
3724: } elsif ($space eq 'course') {
3725: # FIXME - not supporting calls for a specific user
3726: return $ENV{join('.',('request.course',$qualifier))};
3727: # ------------------------------------------------------------------- user.role
3728: } elsif ($space eq 'role') {
3729: # FIXME - not supporting calls for a specific user
3730: my ($role,$where)=split(/\./,$ENV{'request.role'});
3731: if ($qualifier eq 'value') {
3732: return $role;
3733: } elsif ($qualifier eq 'extent') {
3734: return $where;
3735: }
3736: # ----------------------------------------------------------------- user.domain
3737: } elsif ($space eq 'domain') {
3738: return $udom;
3739: # ------------------------------------------------------------------- user.name
3740: } elsif ($space eq 'name') {
3741: return $uname;
3742: # ---------------------------------------------------- Any other user namespace
3743: } else {
3744: my %reply;
3745: if (!$publicuser) {
3746: %reply=&get($space,[$qualifierrest],$udom,$uname);
3747: }
3748: return $reply{$qualifierrest};
3749: }
3750: } elsif ($realm eq 'query') {
3751: # ---------------------------------------------- pull stuff out of query string
3752: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
3753: [$spacequalifierrest]);
3754: return $ENV{'form.'.$spacequalifierrest};
3755: } elsif ($realm eq 'request') {
3756: # ------------------------------------------------------------- request.browser
3757: if ($space eq 'browser') {
3758: if ($qualifier eq 'textremote') {
3759: if (&mt('textual_remote_display') eq 'on') {
3760: return 1;
3761: } else {
3762: return 0;
3763: }
3764: } else {
3765: return $ENV{'browser.'.$qualifier};
3766: }
3767: # ------------------------------------------------------------ request.filename
3768: } else {
3769: return $ENV{'request.'.$spacequalifierrest};
3770: }
3771: } elsif ($realm eq 'course') {
3772: # ---------------------------------------------------------- course.description
3773: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
3774: } elsif ($realm eq 'resource') {
3775:
3776: my $section;
3777: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
3778:
3779: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
3780:
3781: # ----------------------------------------------------- Cascading lookup scheme
3782: if (!$symbparm) { $symbparm=&symbread(); }
3783: my $symbp=$symbparm;
3784: my $mapp=(&decode_symb($symbp))[0];
3785:
3786: my $symbparm=$symbp.'.'.$spacequalifierrest;
3787: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3788:
3789: if (($ENV{'user.name'} eq $uname) &&
3790: ($ENV{'user.domain'} eq $udom)) {
3791: $section=$ENV{'request.course.sec'};
3792: } else {
3793: if (! defined($usection)) {
3794: $section=&usection($udom,$uname,$courseid);
3795: } else {
3796: $section = $usection;
3797: }
3798: }
3799:
3800: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3801: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3802: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3803:
3804: my $courselevel=$courseid.'.'.$spacequalifierrest;
3805: my $courselevelr=$courseid.'.'.$symbparm;
3806: my $courselevelm=$courseid.'.'.$mapparm;
3807:
3808: # ----------------------------------------------------------- first, check user
3809: #most student don\'t have any data set, check if there is some data
3810: if (! &EXT_cache_status($udom,$uname)) {
3811: my $hashid="$udom:$uname";
3812: my ($result,$cached)=&is_cached(\%userresdatacache,$hashid,
3813: 'userres');
3814: if (!defined($cached)) {
3815: my %resourcedata=&dump('resourcedata',$udom,$uname);
3816: $result=\%resourcedata;
3817: &do_cache(\%userresdatacache,$hashid,$result,'userres');
3818: }
3819: my ($tmp)=keys(%$result);
3820: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
3821: if ($$result{$courselevelr}) {
3822: return $$result{$courselevelr}; }
3823: if ($$result{$courselevelm}) {
3824: return $$result{$courselevelm}; }
3825: if ($$result{$courselevel}) {
3826: return $$result{$courselevel}; }
3827: } else {
3828: #error 2 occurs when the .db doesn't exist
3829: if ($tmp!~/error: 2 /) {
3830: &logthis("<font color=blue>WARNING:".
3831: " Trying to get resource data for ".
3832: $uname." at ".$udom.": ".
3833: $tmp."</font>");
3834: } elsif ($tmp=~/error: 2 /) {
3835: &EXT_cache_set($udom,$uname);
3836: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3837: return $tmp;
3838: }
3839: }
3840: }
3841:
3842: # -------------------------------------------------------- second, check course
3843:
3844: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3845: $ENV{'course.'.$courseid.'.domain'},
3846: ($seclevelr,$seclevelm,$seclevel,
3847: $courselevelr,$courselevelm,
3848: $courselevel));
3849: if (defined($coursereply)) { return $coursereply; }
3850:
3851: # ------------------------------------------------------ third, check map parms
3852: my %parmhash=();
3853: my $thisparm='';
3854: if (tie(%parmhash,'GDBM_File',
3855: $ENV{'request.course.fn'}.'_parms.db',
3856: &GDBM_READER(),0640)) {
3857: $thisparm=$parmhash{$symbparm};
3858: untie(%parmhash);
3859: }
3860: if ($thisparm) { return $thisparm; }
3861: }
3862: # --------------------------------------------- last, look in resource metadata
3863:
3864: $spacequalifierrest=~s/\./\_/;
3865: my $filename;
3866: if (!$symbparm) { $symbparm=&symbread(); }
3867: if ($symbparm) {
3868: $filename=(&decode_symb($symbparm))[2];
3869: } else {
3870: $filename=$ENV{'request.filename'};
3871: }
3872: my $metadata=&metadata($filename,$spacequalifierrest);
3873: if (defined($metadata)) { return $metadata; }
3874: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
3875: if (defined($metadata)) { return $metadata; }
3876:
3877: # ------------------------------------------------------------------ Cascade up
3878: unless ($space eq '0') {
3879: my @parts=split(/_/,$space);
3880: my $id=pop(@parts);
3881: my $part=join('_',@parts);
3882: if ($part eq '') { $part='0'; }
3883: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
3884: $symbparm,$udom,$uname,$section,1);
3885: if (defined($partgeneral)) { return $partgeneral; }
3886: }
3887: if ($recurse) { return undef; }
3888: my $pack_def=&packages_tab_default($filename,$varname);
3889: if (defined($pack_def)) { return $pack_def; }
3890:
3891: # ---------------------------------------------------- Any other user namespace
3892: } elsif ($realm eq 'environment') {
3893: # ----------------------------------------------------------------- environment
3894: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3895: return $ENV{'environment.'.$spacequalifierrest};
3896: } else {
3897: my %returnhash=&userenvironment($udom,$uname,
3898: $spacequalifierrest);
3899: return $returnhash{$spacequalifierrest};
3900: }
3901: } elsif ($realm eq 'system') {
3902: # ----------------------------------------------------------------- system.time
3903: if ($space eq 'time') {
3904: return time;
3905: }
3906: }
3907: return '';
3908: }
3909:
3910: sub packages_tab_default {
3911: my ($uri,$varname)=@_;
3912: my (undef,$part,$name)=split(/\./,$varname);
3913: my $packages=&metadata($uri,'packages');
3914: foreach my $package (split(/,/,$packages)) {
3915: my ($pack_type,$pack_part)=split(/_/,$package,2);
3916: if (defined($packagetab{"$pack_type&$name&default"})) {
3917: return $packagetab{"$pack_type&$name&default"};
3918: }
3919: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
3920: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
3921: }
3922: }
3923: return undef;
3924: }
3925:
3926: sub add_prefix_and_part {
3927: my ($prefix,$part)=@_;
3928: my $keyroot;
3929: if (defined($prefix) && $prefix !~ /^__/) {
3930: # prefix that has a part already
3931: $keyroot=$prefix;
3932: } elsif (defined($prefix)) {
3933: # prefix that is missing a part
3934: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3935: } else {
3936: # no prefix at all
3937: if (defined($part)) { $keyroot='_'.$part; }
3938: }
3939: return $keyroot;
3940: }
3941:
3942: # ---------------------------------------------------------------- Get metadata
3943:
3944: sub metadata {
3945: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3946: $uri=&declutter($uri);
3947: # if it is a non metadata possible uri return quickly
3948: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3949: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
3950: ($uri =~ m|home/[^/]+/public_html/|)) {
3951: return undef;
3952: }
3953: my $filename=$uri;
3954: $uri=~s/\.meta$//;
3955: #
3956: # Is the metadata already cached?
3957: # Look at timestamp of caching
3958: # Everything is cached by the main uri, libraries are never directly cached
3959: #
3960: if (!defined($liburi)) {
3961: my ($result,$cached)=&is_cached(\%metacache,$uri,'meta');
3962: if (defined($cached)) { return $result->{':'.$what}; }
3963: }
3964: {
3965: #
3966: # Is this a recursive call for a library?
3967: #
3968: if (! exists($metacache{$uri})) {
3969: $metacache{$uri}={};
3970: }
3971: if ($liburi) {
3972: $liburi=&declutter($liburi);
3973: $filename=$liburi;
3974: } else {
3975: &devalidate_cache(\%metacache,$uri,'meta');
3976: }
3977: my %metathesekeys=();
3978: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3979: my $metastring;
3980: if ($uri !~ m|^uploaded/|) {
3981: $metastring=&getfile(&filelocation('',&clutter($filename)));
3982: }
3983: my $parser=HTML::LCParser->new(\$metastring);
3984: my $token;
3985: undef %metathesekeys;
3986: while ($token=$parser->get_token) {
3987: if ($token->[0] eq 'S') {
3988: if (defined($token->[2]->{'package'})) {
3989: #
3990: # This is a package - get package info
3991: #
3992: my $package=$token->[2]->{'package'};
3993: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3994: if (defined($token->[2]->{'id'})) {
3995: $keyroot.='_'.$token->[2]->{'id'};
3996: }
3997: if ($metacache{$uri}->{':packages'}) {
3998: $metacache{$uri}->{':packages'}.=','.$package.$keyroot;
3999: } else {
4000: $metacache{$uri}->{':packages'}=$package.$keyroot;
4001: }
4002: foreach (keys %packagetab) {
4003: my $part=$keyroot;
4004: $part=~s/^\_//;
4005: if ($_=~/^\Q$package\E\&/ ||
4006: $_=~/^\Q$package\E_0\&/) {
4007: my ($pack,$name,$subp)=split(/\&/,$_);
4008: # ignore package.tab specified default values
4009: # here &package_tab_default() will fetch those
4010: if ($subp eq 'default') { next; }
4011: my $value=$packagetab{$_};
4012: my $unikey;
4013: if ($pack =~ /_0$/) {
4014: $unikey='parameter_0_'.$name;
4015: $part=0;
4016: } else {
4017: $unikey='parameter'.$keyroot.'_'.$name;
4018: }
4019: if ($subp eq 'display') {
4020: $value.=' [Part: '.$part.']';
4021: }
4022: $metacache{$uri}->{':'.$unikey.'.part'}=$part;
4023: $metathesekeys{$unikey}=1;
4024: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4025: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
4026: }
4027: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4028: $metacache{$uri}->{':'.$unikey}=
4029: $metacache{$uri}->{':'.$unikey.'.default'};
4030: }
4031: }
4032: }
4033: } else {
4034: #
4035: # This is not a package - some other kind of start tag
4036: #
4037: my $entry=$token->[1];
4038: my $unikey;
4039: if ($entry eq 'import') {
4040: $unikey='';
4041: } else {
4042: $unikey=$entry;
4043: }
4044: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4045:
4046: if (defined($token->[2]->{'id'})) {
4047: $unikey.='_'.$token->[2]->{'id'};
4048: }
4049:
4050: if ($entry eq 'import') {
4051: #
4052: # Importing a library here
4053: #
4054: if ($depthcount<20) {
4055: my $location=$parser->get_text('/import');
4056: my $dir=$filename;
4057: $dir=~s|[^/]*$||;
4058: $location=&filelocation($dir,$location);
4059: foreach (sort(split(/\,/,&metadata($uri,'keys',
4060: $location,$unikey,
4061: $depthcount+1)))) {
4062: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
4063: $metathesekeys{$_}=1;
4064: }
4065: }
4066: } else {
4067:
4068: if (defined($token->[2]->{'name'})) {
4069: $unikey.='_'.$token->[2]->{'name'};
4070: }
4071: $metathesekeys{$unikey}=1;
4072: foreach (@{$token->[3]}) {
4073: $metacache{$uri}->{':'.$unikey.'.'.$_}=$token->[2]->{$_};
4074: }
4075: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
4076: my $default=$metacache{$uri}->{':'.$unikey.'.default'};
4077: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
4078: # only ws inside the tag, and not in default, so use default
4079: # as value
4080: $metacache{$uri}->{':'.$unikey}=$default;
4081: } else {
4082: # either something interesting inside the tag or default
4083: # uninteresting
4084: $metacache{$uri}->{':'.$unikey}=$internaltext;
4085: }
4086: # end of not-a-package not-a-library import
4087: }
4088: # end of not-a-package start tag
4089: }
4090: # the next is the end of "start tag"
4091: }
4092: }
4093: my ($extension) = ($uri =~ /\.(\w+)$/);
4094: foreach my $key (sort(keys(%packagetab))) {
4095: #&logthis("extsion1 $extension $key !!");
4096: #no specific packages #how's our extension
4097: if ($key!~/^extension_\Q$extension\E&/) { next; }
4098: &metadata_create_package_def($uri,$key,'extension_'.$extension,
4099: \%metathesekeys);
4100: }
4101: if (!exists($metacache{$uri}->{':packages'})) {
4102: foreach my $key (sort(keys(%packagetab))) {
4103: #no specific packages well let's get default then
4104: if ($key!~/^default&/) { next; }
4105: &metadata_create_package_def($uri,$key,'default',
4106: \%metathesekeys);
4107: }
4108: }
4109: # are there custom rights to evaluate
4110: if ($metacache{$uri}->{':copyright'} eq 'custom') {
4111:
4112: #
4113: # Importing a rights file here
4114: #
4115: unless ($depthcount) {
4116: my $location=$metacache{$uri}->{':customdistributionfile'};
4117: my $dir=$filename;
4118: $dir=~s|[^/]*$||;
4119: $location=&filelocation($dir,$location);
4120: foreach (sort(split(/\,/,&metadata($uri,'keys',
4121: $location,'_rights',
4122: $depthcount+1)))) {
4123: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
4124: $metathesekeys{$_}=1;
4125: }
4126: }
4127: }
4128: $metacache{$uri}->{':keys'}=join(',',keys %metathesekeys);
4129: &metadata_generate_part0(\%metathesekeys,$metacache{$uri},$uri);
4130: $metacache{$uri}->{':allpossiblekeys'}=join(',',keys %metathesekeys);
4131: &do_cache(\%metacache,$uri,$metacache{$uri},'meta');
4132: # this is the end of "was not already recently cached
4133: }
4134: return $metacache{$uri}->{':'.$what};
4135: }
4136:
4137: sub metadata_create_package_def {
4138: my ($uri,$key,$package,$metathesekeys)=@_;
4139: my ($pack,$name,$subp)=split(/\&/,$key);
4140: if ($subp eq 'default') { next; }
4141:
4142: if (defined($metacache{$uri}->{':packages'})) {
4143: $metacache{$uri}->{':packages'}.=','.$package;
4144: } else {
4145: $metacache{$uri}->{':packages'}=$package;
4146: }
4147: my $value=$packagetab{$key};
4148: my $unikey;
4149: $unikey='parameter_0_'.$name;
4150: $metacache{$uri}->{':'.$unikey.'.part'}=0;
4151: $$metathesekeys{$unikey}=1;
4152: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4153: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
4154: }
4155: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4156: $metacache{$uri}->{':'.$unikey}=
4157: $metacache{$uri}->{':'.$unikey.'.default'};
4158: }
4159: }
4160:
4161: sub metadata_generate_part0 {
4162: my ($metadata,$metacache,$uri) = @_;
4163: my %allnames;
4164: foreach my $metakey (sort keys %$metadata) {
4165: if ($metakey=~/^parameter\_(.*)/) {
4166: my $part=$$metacache{':'.$metakey.'.part'};
4167: my $name=$$metacache{':'.$metakey.'.name'};
4168: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
4169: $allnames{$name}=$part;
4170: }
4171: }
4172: }
4173: foreach my $name (keys(%allnames)) {
4174: $$metadata{"parameter_0_$name"}=1;
4175: my $key=":parameter_0_$name";
4176: $$metacache{"$key.part"}='0';
4177: $$metacache{"$key.name"}=$name;
4178: $$metacache{"$key.type"}=$$metacache{':parameter_'.
4179: $allnames{$name}.'_'.$name.
4180: '.type'};
4181: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
4182: '.display'};
4183: my $expr='\\[Part: '.$allnames{$name}.'\\]';
4184: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
4185: $$metacache{"$key.display"}=$olddis;
4186: }
4187: }
4188:
4189: # ------------------------------------------------- Get the title of a resource
4190:
4191: sub gettitle {
4192: my $urlsymb=shift;
4193: my $symb=&symbread($urlsymb);
4194: unless ($symb) {
4195: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
4196: return &metadata($urlsymb,'title');
4197: }
4198: my ($result,$cached)=&is_cached(\%titlecache,$symb,'title',600);
4199: if (defined($cached)) { return $result; }
4200: my ($map,$resid,$url)=&decode_symb($symb);
4201: my $title='';
4202: my %bighash;
4203: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4204: &GDBM_READER(),0640)) {
4205: my $mapid=$bighash{'map_pc_'.&clutter($map)};
4206: $title=$bighash{'title_'.$mapid.'.'.$resid};
4207: untie %bighash;
4208: }
4209: $title=~s/\&colon\;/\:/gs;
4210: if ($title) {
4211: return &do_cache(\%titlecache,$symb,$title,'title');
4212: } else {
4213: return &metadata($urlsymb,'title');
4214: }
4215: }
4216:
4217: # ------------------------------------------------- Update symbolic store links
4218:
4219: sub symblist {
4220: my ($mapname,%newhash)=@_;
4221: $mapname=&deversion(&declutter($mapname));
4222: my %hash;
4223: if (($ENV{'request.course.fn'}) && (%newhash)) {
4224: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4225: &GDBM_WRCREAT(),0640)) {
4226: foreach (keys %newhash) {
4227: $hash{declutter($_)}=$mapname.'___'.&deversion($newhash{$_});
4228: }
4229: if (untie(%hash)) {
4230: return 'ok';
4231: }
4232: }
4233: }
4234: return 'error';
4235: }
4236:
4237: # --------------------------------------------------------------- Verify a symb
4238:
4239: sub symbverify {
4240: my ($symb,$thisfn)=@_;
4241: $thisfn=&declutter($thisfn);
4242: # direct jump to resource in page or to a sequence - will construct own symbs
4243: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
4244: # check URL part
4245: my ($map,$resid,$url)=&decode_symb($symb);
4246:
4247: unless ($url eq $thisfn) { return 0; }
4248:
4249: $symb=&symbclean($symb);
4250: $thisfn=&deversion($thisfn);
4251:
4252: my %bighash;
4253: my $okay=0;
4254:
4255: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4256: &GDBM_READER(),0640)) {
4257: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4258: unless ($ids) {
4259: $ids=$bighash{'ids_/'.$thisfn};
4260: }
4261: if ($ids) {
4262: # ------------------------------------------------------------------- Has ID(s)
4263: foreach (split(/\,/,$ids)) {
4264: my ($mapid,$resid)=split(/\./,$_);
4265: if (
4266: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
4267: eq $symb) {
4268: $okay=1;
4269: }
4270: }
4271: }
4272: untie(%bighash);
4273: }
4274: return $okay;
4275: }
4276:
4277: # --------------------------------------------------------------- Clean-up symb
4278:
4279: sub symbclean {
4280: my $symb=shift;
4281:
4282: # remove version from map
4283: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
4284:
4285: # remove version from URL
4286: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
4287:
4288: return $symb;
4289: }
4290:
4291: # ---------------------------------------------- Split symb to find map and url
4292:
4293: sub encode_symb {
4294: my ($map,$resid,$url)=@_;
4295: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
4296: }
4297:
4298: sub decode_symb {
4299: my ($map,$resid,$url)=split(/\_\_\_/,shift);
4300: return (&fixversion($map),$resid,&fixversion($url));
4301: }
4302:
4303: sub fixversion {
4304: my $fn=shift;
4305: if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
4306: my %bighash;
4307: my $uri=&clutter($fn);
4308: my $key=$ENV{'request.course.id'}.'_'.$uri;
4309: # is this cached?
4310: my ($result,$cached)=&is_cached(\%courseresversioncache,$key,
4311: 'courseresversion',600);
4312: if (defined($cached)) { return $result; }
4313: # unfortunately not cached, or expired
4314: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4315: &GDBM_READER(),0640)) {
4316: if ($bighash{'version_'.$uri}) {
4317: my $version=$bighash{'version_'.$uri};
4318: unless (($version eq 'mostrecent') ||
4319: ($version==&getversion($uri))) {
4320: $uri=~s/\.(\w+)$/\.$version\.$1/;
4321: }
4322: }
4323: untie %bighash;
4324: }
4325: return &do_cache
4326: (\%courseresversioncache,$key,&declutter($uri),'courseresversion');
4327: }
4328:
4329: sub deversion {
4330: my $url=shift;
4331: $url=~s/\.\d+\.(\w+)$/\.$1/;
4332: return $url;
4333: }
4334:
4335: # ------------------------------------------------------ Return symb list entry
4336:
4337: sub symbread {
4338: my ($thisfn,$donotrecurse)=@_;
4339: # no filename provided? try from environment
4340: unless ($thisfn) {
4341: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
4342: $thisfn=$ENV{'request.filename'};
4343: }
4344: # is that filename actually a symb? Verify, clean, and return
4345: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
4346: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
4347: }
4348: $thisfn=declutter($thisfn);
4349: my %hash;
4350: my %bighash;
4351: my $syval='';
4352: if (($ENV{'request.course.fn'}) && ($thisfn)) {
4353: my $targetfn = $thisfn;
4354: if ( ($thisfn =~ m/^uploaded\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
4355: $targetfn = 'adm/wrapper/'.$thisfn;
4356: }
4357: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4358: &GDBM_READER(),0640)) {
4359: $syval=$hash{$targetfn};
4360: untie(%hash);
4361: }
4362: # ---------------------------------------------------------- There was an entry
4363: if ($syval) {
4364: unless ($syval=~/\_\d+$/) {
4365: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
4366: &appenv('request.ambiguous' => $thisfn);
4367: return '';
4368: }
4369: $syval.=$1;
4370: }
4371: } else {
4372: # ------------------------------------------------------- Was not in symb table
4373: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4374: &GDBM_READER(),0640)) {
4375: # ---------------------------------------------- Get ID(s) for current resource
4376: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4377: unless ($ids) {
4378: $ids=$bighash{'ids_/'.$thisfn};
4379: }
4380: unless ($ids) {
4381: # alias?
4382: $ids=$bighash{'mapalias_'.$thisfn};
4383: }
4384: if ($ids) {
4385: # ------------------------------------------------------------------- Has ID(s)
4386: my @possibilities=split(/\,/,$ids);
4387: if ($#possibilities==0) {
4388: # ----------------------------------------------- There is only one possibility
4389: my ($mapid,$resid)=split(/\./,$ids);
4390: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
4391: } elsif (!$donotrecurse) {
4392: # ------------------------------------------ There is more than one possibility
4393: my $realpossible=0;
4394: foreach (@possibilities) {
4395: my $file=$bighash{'src_'.$_};
4396: if (&allowed('bre',$file)) {
4397: my ($mapid,$resid)=split(/\./,$_);
4398: if ($bighash{'map_type_'.$mapid} ne 'page') {
4399: $realpossible++;
4400: $syval=declutter($bighash{'map_id_'.$mapid}).
4401: '___'.$resid;
4402: }
4403: }
4404: }
4405: if ($realpossible!=1) { $syval=''; }
4406: } else {
4407: $syval='';
4408: }
4409: }
4410: untie(%bighash)
4411: }
4412: }
4413: if ($syval) {
4414: return &symbclean($syval.'___'.$thisfn);
4415: }
4416: }
4417: &appenv('request.ambiguous' => $thisfn);
4418: return '';
4419: }
4420:
4421: # ---------------------------------------------------------- Return random seed
4422:
4423: sub numval {
4424: my $txt=shift;
4425: $txt=~tr/A-J/0-9/;
4426: $txt=~tr/a-j/0-9/;
4427: $txt=~tr/K-T/0-9/;
4428: $txt=~tr/k-t/0-9/;
4429: $txt=~tr/U-Z/0-5/;
4430: $txt=~tr/u-z/0-5/;
4431: $txt=~s/\D//g;
4432: return int($txt);
4433: }
4434:
4435: sub numval2 {
4436: my $txt=shift;
4437: $txt=~tr/A-J/0-9/;
4438: $txt=~tr/a-j/0-9/;
4439: $txt=~tr/K-T/0-9/;
4440: $txt=~tr/k-t/0-9/;
4441: $txt=~tr/U-Z/0-5/;
4442: $txt=~tr/u-z/0-5/;
4443: $txt=~s/\D//g;
4444: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
4445: my $total;
4446: foreach my $val (@txts) { $total+=$val; }
4447: return int($total);
4448: }
4449:
4450: sub latest_rnd_algorithm_id {
4451: return '64bit2';
4452: }
4453:
4454: sub getCODE {
4455: if (defined($ENV{'form.CODE'})) { return $ENV{'form.CODE'}; }
4456: if (defined($Apache::lonhomework::parsing_a_problem) &&
4457: defined($Apache::lonhomework::history{'resource.CODE'})) {
4458: return $Apache::lonhomework::history{'resource.CODE'};
4459: }
4460: return undef;
4461: }
4462:
4463: sub rndseed {
4464: my ($symb,$courseid,$domain,$username)=@_;
4465:
4466: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
4467: if (!$symb) {
4468: unless ($symb=$wsymb) { return time; }
4469: }
4470: if (!$courseid) { $courseid=$wcourseid; }
4471: if (!$domain) { $domain=$wdomain; }
4472: if (!$username) { $username=$wusername }
4473: my $which=$ENV{"course.$courseid.rndseed"};
4474: if (defined(&getCODE())) {
4475: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
4476: } elsif ($which eq '64bit2') {
4477: return &rndseed_64bit2($symb,$courseid,$domain,$username);
4478: } elsif ($which eq '64bit') {
4479: return &rndseed_64bit($symb,$courseid,$domain,$username);
4480: }
4481: return &rndseed_32bit($symb,$courseid,$domain,$username);
4482: }
4483:
4484: sub rndseed_32bit {
4485: my ($symb,$courseid,$domain,$username)=@_;
4486: {
4487: use integer;
4488: my $symbchck=unpack("%32C*",$symb) << 27;
4489: my $symbseed=numval($symb) << 22;
4490: my $namechck=unpack("%32C*",$username) << 17;
4491: my $nameseed=numval($username) << 12;
4492: my $domainseed=unpack("%32C*",$domain) << 7;
4493: my $courseseed=unpack("%32C*",$courseid);
4494: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
4495: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4496: #&Apache::lonxml::debug("rndseed :$num:$symb");
4497: return $num;
4498: }
4499: }
4500:
4501: sub rndseed_64bit {
4502: my ($symb,$courseid,$domain,$username)=@_;
4503: {
4504: use integer;
4505: my $symbchck=unpack("%32S*",$symb) << 21;
4506: my $symbseed=numval($symb) << 10;
4507: my $namechck=unpack("%32S*",$username);
4508:
4509: my $nameseed=numval($username) << 21;
4510: my $domainseed=unpack("%32S*",$domain) << 10;
4511: my $courseseed=unpack("%32S*",$courseid);
4512:
4513: my $num1=$symbchck+$symbseed+$namechck;
4514: my $num2=$nameseed+$domainseed+$courseseed;
4515: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4516: #&Apache::lonxml::debug("rndseed :$num:$symb");
4517: return "$num1,$num2";
4518: }
4519: }
4520:
4521: sub rndseed_64bit2 {
4522: my ($symb,$courseid,$domain,$username)=@_;
4523: {
4524: use integer;
4525: # strings need to be an even # of cahracters long, it it is odd the
4526: # last characters gets thrown away
4527: my $symbchck=unpack("%32S*",$symb.' ') << 21;
4528: my $symbseed=numval($symb) << 10;
4529: my $namechck=unpack("%32S*",$username.' ');
4530:
4531: my $nameseed=numval($username) << 21;
4532: my $domainseed=unpack("%32S*",$domain.' ') << 10;
4533: my $courseseed=unpack("%32S*",$courseid.' ');
4534:
4535: my $num1=$symbchck+$symbseed+$namechck;
4536: my $num2=$nameseed+$domainseed+$courseseed;
4537: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4538: #&Apache::lonxml::debug("rndseed :$num:$symb");
4539: return "$num1,$num2";
4540: }
4541: }
4542:
4543: sub rndseed_CODE_64bit {
4544: my ($symb,$courseid,$domain,$username)=@_;
4545: {
4546: use integer;
4547: my $symbchck=unpack("%32S*",$symb.' ') << 16;
4548: my $symbseed=numval2($symb);
4549: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
4550: my $CODEseed=numval(&getCODE());
4551: my $courseseed=unpack("%32S*",$courseid.' ');
4552: my $num1=$symbseed+$CODEchck;
4553: my $num2=$CODEseed+$courseseed+$symbchck;
4554: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
4555: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
4556: return "$num1,$num2";
4557: }
4558: }
4559:
4560: sub setup_random_from_rndseed {
4561: my ($rndseed)=@_;
4562: if ($rndseed =~/,/) {
4563: my ($num1,$num2)=split(/,/,$rndseed);
4564: &Math::Random::random_set_seed(abs($num1),abs($num2));
4565: } else {
4566: &Math::Random::random_set_seed_from_phrase($rndseed);
4567: }
4568: }
4569:
4570: sub latest_receipt_algorithm_id {
4571: return 'receipt2';
4572: }
4573:
4574: sub recunique {
4575: my $fucourseid=shift;
4576: my $unique;
4577: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
4578: $unique=$ENV{"course.$fucourseid.internal.encseed"};
4579: } else {
4580: $unique=$perlvar{'lonReceipt'};
4581: }
4582: return unpack("%32C*",$unique);
4583: }
4584:
4585: sub recprefix {
4586: my $fucourseid=shift;
4587: my $prefix;
4588: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
4589: $prefix=$ENV{"course.$fucourseid.internal.encpref"};
4590: } else {
4591: $prefix=$perlvar{'lonHostID'};
4592: }
4593: return unpack("%32C*",$prefix);
4594: }
4595:
4596: sub ireceipt {
4597: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
4598: my $cuname=unpack("%32C*",$funame);
4599: my $cudom=unpack("%32C*",$fudom);
4600: my $cucourseid=unpack("%32C*",$fucourseid);
4601: my $cusymb=unpack("%32C*",$fusymb);
4602: my $cunique=&recunique($fucourseid);
4603: my $cpart=unpack("%32S*",$part);
4604: my $return =&recprefix($fucourseid).'-';
4605: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
4606: $ENV{'request.state'} eq 'construct') {
4607: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
4608: " and ".($cpart%$cudom));
4609:
4610: $return.= ($cunique%$cuname+
4611: $cunique%$cudom+
4612: $cusymb%$cuname+
4613: $cusymb%$cudom+
4614: $cucourseid%$cuname+
4615: $cucourseid%$cudom+
4616: $cpart%$cuname+
4617: $cpart%$cudom);
4618: } else {
4619: $return.= ($cunique%$cuname+
4620: $cunique%$cudom+
4621: $cusymb%$cuname+
4622: $cusymb%$cudom+
4623: $cucourseid%$cuname+
4624: $cucourseid%$cudom);
4625: }
4626: return $return;
4627: }
4628:
4629: sub receipt {
4630: my ($part)=@_;
4631: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
4632: return &ireceipt($name,$domain,$courseid,$symb,$part);
4633: }
4634:
4635: # ------------------------------------------------------------ Serves up a file
4636: # returns either the contents of the file or
4637: # -1 if the file doesn't exist
4638: #
4639: # if the target is a file that was uploaded via DOCS,
4640: # a check will be made to see if a current copy exists on the local server,
4641: # if it does this will be served, otherwise a copy will be retrieved from
4642: # the home server for the course and stored in /home/httpd/html/userfiles on
4643: # the local server.
4644:
4645: sub getfile {
4646: my ($file,$caller) = @_;
4647:
4648: if ($file !~ m|^/*uploaded/(\w+)/(\w+)/(.+)$|) {
4649: # normal file from res space
4650: &repcopy($file);
4651: return &readfile($file);
4652: }
4653:
4654: my $info;
4655: my $cdom = $1;
4656: my $cnum = $2;
4657: my $filename = $3;
4658: my $path = $Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles';
4659: my ($lwpresp,$rtncode);
4660: my $localfile = $path.'/'.$cdom.'/'.$cnum.'/'.$filename;
4661: if (-e "$localfile") {
4662: my @fileinfo = stat($localfile);
4663: $lwpresp = &getuploaded('HEAD',$file,$cdom,$cnum,\$info,\$rtncode);
4664: if ($lwpresp ne 'ok') {
4665: if ($rtncode eq '404') {
4666: unlink($localfile);
4667: }
4668: return -1;
4669: }
4670: if ($info < $fileinfo[9]) {
4671: return &readfile($localfile);
4672: }
4673: $info = '';
4674: $lwpresp = &getuploaded('GET',$file,$cdom,$cnum,\$info,\$rtncode);
4675: if ($lwpresp ne 'ok') {
4676: return -1;
4677: }
4678: } else {
4679: $lwpresp = &getuploaded('GET',$file,$cdom,$cnum,\$info,\$rtncode);
4680: if ($lwpresp ne 'ok') {
4681: return -1;
4682: }
4683: my @parts = ($cdom,$cnum);
4684: if ($filename =~ m|^(.+)/[^/]+$|) {
4685: push @parts, split(/\//,$1);
4686: }
4687: foreach my $part (@parts) {
4688: $path .= '/'.$part;
4689: if (!-e $path) {
4690: mkdir($path,0770);
4691: }
4692: }
4693: }
4694: open (FILE,">$localfile");
4695: print FILE $info;
4696: close(FILE);
4697: if ($caller eq 'uploadrep') {
4698: return 'ok';
4699: }
4700: return $info;
4701: }
4702:
4703: sub getuploaded {
4704: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
4705: $uri=~s/^\///;
4706: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
4707: my $ua=new LWP::UserAgent;
4708: my $request=new HTTP::Request($reqtype,$uri);
4709: my $response=$ua->request($request);
4710: $$rtncode = $response->code;
4711: if (! $response->is_success()) {
4712: return 'failed';
4713: }
4714: if ($reqtype eq 'HEAD') {
4715: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
4716: } elsif ($reqtype eq 'GET') {
4717: $$info = $response->content;
4718: }
4719: return 'ok';
4720: }
4721:
4722: sub readfile {
4723: my $file = shift;
4724: if ( (! -e $file ) || ($file eq '') ) { return -1; };
4725: my $fh;
4726: open($fh,"<$file");
4727: my $a='';
4728: while (<$fh>) { $a .=$_; }
4729: return $a;
4730: }
4731:
4732: sub filelocation {
4733: my ($dir,$file) = @_;
4734: my $location;
4735: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
4736: if ($file=~m:^/~:) { # is a contruction space reference
4737: $location = $file;
4738: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
4739: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
4740: $location=$file;
4741: } else {
4742: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
4743: $file=~s:^/res/:/:;
4744: if ( !( $file =~ m:^/:) ) {
4745: $location = $dir. '/'.$file;
4746: } else {
4747: $location = '/home/httpd/html/res'.$file;
4748: }
4749: }
4750: $location=~s://+:/:g; # remove duplicate /
4751: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
4752: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
4753: return $location;
4754: }
4755:
4756: sub hreflocation {
4757: my ($dir,$file)=@_;
4758: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
4759: my $finalpath=filelocation($dir,$file);
4760: $finalpath=~s-^/home/httpd/html--;
4761: $finalpath=~s-^/home/(\w+)/public_html/-/~$1/-;
4762: return $finalpath;
4763: } elsif ($file=~m-^/home-) {
4764: $file=~s-^/home/httpd/html--;
4765: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
4766: return $file;
4767: }
4768: return $file;
4769: }
4770:
4771: sub current_machine_domains {
4772: my $hostname=$hostname{$perlvar{'lonHostID'}};
4773: my @domains;
4774: while( my($id, $name) = each(%hostname)) {
4775: # &logthis("-$id-$name-$hostname-");
4776: if ($hostname eq $name) {
4777: push(@domains,$hostdom{$id});
4778: }
4779: }
4780: return @domains;
4781: }
4782:
4783: sub current_machine_ids {
4784: my $hostname=$hostname{$perlvar{'lonHostID'}};
4785: my @ids;
4786: while( my($id, $name) = each(%hostname)) {
4787: # &logthis("-$id-$name-$hostname-");
4788: if ($hostname eq $name) {
4789: push(@ids,$id);
4790: }
4791: }
4792: return @ids;
4793: }
4794:
4795: # ------------------------------------------------------------- Declutters URLs
4796:
4797: sub declutter {
4798: my $thisfn=shift;
4799: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
4800: $thisfn=~s/^\///;
4801: $thisfn=~s/^res\///;
4802: $thisfn=~s/\?.+$//;
4803: return $thisfn;
4804: }
4805:
4806: # ------------------------------------------------------------- Clutter up URLs
4807:
4808: sub clutter {
4809: my $thisfn='/'.&declutter(shift);
4810: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
4811: $thisfn='/res'.$thisfn;
4812: }
4813: return $thisfn;
4814: }
4815:
4816: # -------------------------------------------------------- Escape Special Chars
4817:
4818: sub escape {
4819: my $str=shift;
4820: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
4821: return $str;
4822: }
4823:
4824: # ----------------------------------------------------- Un-Escape Special Chars
4825:
4826: sub unescape {
4827: my $str=shift;
4828: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
4829: return $str;
4830: }
4831:
4832: sub mod_perl_version {
4833: if (defined($perlvar{'MODPERL2'})) {
4834: return 2;
4835: }
4836: return 1;
4837: }
4838:
4839: sub correct_line_ends {
4840: my ($result)=@_;
4841: $$result =~s/\r\n/\n/mg;
4842: $$result =~s/\r/\n/mg;
4843: }
4844: # ================================================================ Main Program
4845:
4846: sub goodbye {
4847: &logthis("Starting Shut down");
4848: #not converted to using infrastruture and probably shouldn't be
4849: &logthis(sprintf("%-20s is %s",'%badServerCache',scalar(%badServerCache)));
4850: #converted
4851: &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
4852: &logthis(sprintf("%-20s is %s",'%homecache',scalar(%homecache)));
4853: &logthis(sprintf("%-20s is %s",'%titlecache',scalar(%titlecache)));
4854: &logthis(sprintf("%-20s is %s",'%courseresdatacache',scalar(%courseresdatacache)));
4855: #1.1 only
4856: &logthis(sprintf("%-20s is %s",'%userresdatacache',scalar(%userresdatacache)));
4857: &logthis(sprintf("%-20s is %s",'%usectioncache',scalar(%usectioncache)));
4858: &logthis(sprintf("%-20s is %s",'%courseresversioncache',scalar(%courseresversioncache)));
4859: &logthis(sprintf("%-20s is %s",'%resversioncache',scalar(%resversioncache)));
4860: &flushcourselogs();
4861: &logthis("Shutting down");
4862: return DONE;
4863: }
4864:
4865: BEGIN {
4866: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
4867: unless ($readit) {
4868: {
4869: open(my $config,"</etc/httpd/conf/loncapa.conf");
4870:
4871: while (my $configline=<$config>) {
4872: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
4873: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
4874: chomp($varvalue);
4875: $perlvar{$varname}=$varvalue;
4876: }
4877: }
4878: close($config);
4879: }
4880: {
4881: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
4882:
4883: while (my $configline=<$config>) {
4884: if ($configline =~ /^[^\#]*PerlSetVar/) {
4885: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
4886: chomp($varvalue);
4887: $perlvar{$varname}=$varvalue;
4888: }
4889: }
4890: close($config);
4891: }
4892:
4893: # ------------------------------------------------------------ Read domain file
4894: {
4895: %domaindescription = ();
4896: %domain_auth_def = ();
4897: %domain_auth_arg_def = ();
4898: my $fh;
4899: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
4900: while (<$fh>) {
4901: next if (/^(\#|\s*$)/);
4902: # next if /^\#/;
4903: chomp;
4904: my ($domain, $domain_description, $def_auth, $def_auth_arg,
4905: $def_lang, $city, $longi, $lati) = split(/:/,$_);
4906: $domain_auth_def{$domain}=$def_auth;
4907: $domain_auth_arg_def{$domain}=$def_auth_arg;
4908: $domaindescription{$domain}=$domain_description;
4909: $domain_lang_def{$domain}=$def_lang;
4910: $domain_city{$domain}=$city;
4911: $domain_longi{$domain}=$longi;
4912: $domain_lati{$domain}=$lati;
4913:
4914: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
4915: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
4916: }
4917: }
4918: close ($fh);
4919: }
4920:
4921:
4922: # ------------------------------------------------------------- Read hosts file
4923: {
4924: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
4925:
4926: while (my $configline=<$config>) {
4927: next if ($configline =~ /^(\#|\s*$)/);
4928: chomp($configline);
4929: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
4930: if ($id && $domain && $role && $name && $ip) {
4931: $hostname{$id}=$name;
4932: $hostdom{$id}=$domain;
4933: $hostip{$id}=$ip;
4934: $iphost{$ip}=$id;
4935: if ($role eq 'library') { $libserv{$id}=$name; }
4936: } else {
4937: if ($configline) {
4938: &logthis("Skipping hosts.tab line -$configline-");
4939: }
4940: }
4941: }
4942: close($config);
4943: }
4944:
4945: # ------------------------------------------------------ Read spare server file
4946: {
4947: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
4948:
4949: while (my $configline=<$config>) {
4950: chomp($configline);
4951: if ($configline) {
4952: $spareid{$configline}=1;
4953: }
4954: }
4955: close($config);
4956: }
4957: # ------------------------------------------------------------ Read permissions
4958: {
4959: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
4960:
4961: while (my $configline=<$config>) {
4962: chomp($configline);
4963: if ($configline) {
4964: my ($role,$perm)=split(/ /,$configline);
4965: if ($perm ne '') { $pr{$role}=$perm; }
4966: }
4967: }
4968: close($config);
4969: }
4970:
4971: # -------------------------------------------- Read plain texts for permissions
4972: {
4973: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
4974:
4975: while (my $configline=<$config>) {
4976: chomp($configline);
4977: if ($configline) {
4978: my ($short,$plain)=split(/:/,$configline);
4979: if ($plain ne '') { $prp{$short}=$plain; }
4980: }
4981: }
4982: close($config);
4983: }
4984:
4985: # ---------------------------------------------------------- Read package table
4986: {
4987: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
4988:
4989: while (my $configline=<$config>) {
4990: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
4991: chomp($configline);
4992: my ($short,$plain)=split(/:/,$configline);
4993: my ($pack,$name)=split(/\&/,$short);
4994: if ($plain ne '') {
4995: $packagetab{$pack.'&'.$name.'&name'}=$name;
4996: $packagetab{$short}=$plain;
4997: }
4998: }
4999: close($config);
5000: }
5001:
5002: # ------------- set up temporary directory
5003: {
5004: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
5005:
5006: }
5007:
5008: %metacache=();
5009:
5010: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
5011: $dumpcount=0;
5012:
5013: &logtouch();
5014: &logthis('<font color=yellow>INFO: Read configuration</font>');
5015: $readit=1;
5016: }
5017: }
5018:
5019: 1;
5020: __END__
5021:
5022: =pod
5023:
5024: =head1 NAME
5025:
5026: Apache::lonnet - Subroutines to ask questions about things in the network.
5027:
5028: =head1 SYNOPSIS
5029:
5030: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
5031:
5032: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
5033:
5034: Common parameters:
5035:
5036: =over 4
5037:
5038: =item *
5039:
5040: $uname : an internal username (if $cname expecting a course Id specifically)
5041:
5042: =item *
5043:
5044: $udom : a domain (if $cdom expecting a course's domain specifically)
5045:
5046: =item *
5047:
5048: $symb : a resource instance identifier
5049:
5050: =item *
5051:
5052: $namespace : the name of a .db file that contains the data needed or
5053: being set.
5054:
5055: =back
5056:
5057: =head1 OVERVIEW
5058:
5059: lonnet provides subroutines which interact with the
5060: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
5061: about classes, users, and resources.
5062:
5063: For many of these objects you can also use this to store data about
5064: them or modify them in various ways.
5065:
5066: =head2 Symbs
5067:
5068: To identify a specific instance of a resource, LON-CAPA uses symbols
5069: or "symbs"X<symb>. These identifiers are built from the URL of the
5070: map, the resource number of the resource in the map, and the URL of
5071: the resource itself. The latter is somewhat redundant, but might help
5072: if maps change.
5073:
5074: An example is
5075:
5076: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
5077:
5078: The respective map entry is
5079:
5080: <resource id="19" src="/res/msu/korte/tests/part12.problem"
5081: title="Problem 2">
5082: </resource>
5083:
5084: Symbs are used by the random number generator, as well as to store and
5085: restore data specific to a certain instance of for example a problem.
5086:
5087: =head2 Storing And Retrieving Data
5088:
5089: X<store()>X<cstore()>X<restore()>Three of the most important functions
5090: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
5091: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
5092: is is the non-critical message twin of cstore. These functions are for
5093: handlers to store a perl hash to a user's permanent data space in an
5094: easy manner, and to retrieve it again on another call. It is expected
5095: that a handler would use this once at the beginning to retrieve data,
5096: and then again once at the end to send only the new data back.
5097:
5098: The data is stored in the user's data directory on the user's
5099: homeserver under the ID of the course.
5100:
5101: The hash that is returned by restore will have all of the previous
5102: value for all of the elements of the hash.
5103:
5104: Example:
5105:
5106: #creating a hash
5107: my %hash;
5108: $hash{'foo'}='bar';
5109:
5110: #storing it
5111: &Apache::lonnet::cstore(\%hash);
5112:
5113: #changing a value
5114: $hash{'foo'}='notbar';
5115:
5116: #adding a new value
5117: $hash{'bar'}='foo';
5118: &Apache::lonnet::cstore(\%hash);
5119:
5120: #retrieving the hash
5121: my %history=&Apache::lonnet::restore();
5122:
5123: #print the hash
5124: foreach my $key (sort(keys(%history))) {
5125: print("\%history{$key} = $history{$key}");
5126: }
5127:
5128: Will print out:
5129:
5130: %history{1:foo} = bar
5131: %history{1:keys} = foo:timestamp
5132: %history{1:timestamp} = 990455579
5133: %history{2:bar} = foo
5134: %history{2:foo} = notbar
5135: %history{2:keys} = foo:bar:timestamp
5136: %history{2:timestamp} = 990455580
5137: %history{bar} = foo
5138: %history{foo} = notbar
5139: %history{timestamp} = 990455580
5140: %history{version} = 2
5141:
5142: Note that the special hash entries C<keys>, C<version> and
5143: C<timestamp> were added to the hash. C<version> will be equal to the
5144: total number of versions of the data that have been stored. The
5145: C<timestamp> attribute will be the UNIX time the hash was
5146: stored. C<keys> is available in every historical section to list which
5147: keys were added or changed at a specific historical revision of a
5148: hash.
5149:
5150: B<Warning>: do not store the hash that restore returns directly. This
5151: will cause a mess since it will restore the historical keys as if the
5152: were new keys. I.E. 1:foo will become 1:1:foo etc.
5153:
5154: Calling convention:
5155:
5156: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
5157: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
5158:
5159: For more detailed information, see lonnet specific documentation.
5160:
5161: =head1 RETURN MESSAGES
5162:
5163: =over 4
5164:
5165: =item * B<con_lost>: unable to contact remote host
5166:
5167: =item * B<con_delayed>: unable to contact remote host, message will be delivered
5168: when the connection is brought back up
5169:
5170: =item * B<con_failed>: unable to contact remote host and unable to save message
5171: for later delivery
5172:
5173: =item * B<error:>: an error a occured, a description of the error follows the :
5174:
5175: =item * B<no_such_host>: unable to fund a host associated with the user/domain
5176: that was requested
5177:
5178: =back
5179:
5180: =head1 PUBLIC SUBROUTINES
5181:
5182: =head2 Session Environment Functions
5183:
5184: =over 4
5185:
5186: =item *
5187: X<appenv()>
5188: B<appenv(%hash)>: the value of %hash is written to
5189: the user envirnoment file, and will be restored for each access this
5190: user makes during this session, also modifies the %ENV for the current
5191: process
5192:
5193: =item *
5194: X<delenv()>
5195: B<delenv($regexp)>: removes all items from the session
5196: environment file that matches the regular expression in $regexp. The
5197: values are also delted from the current processes %ENV.
5198:
5199: =back
5200:
5201: =head2 User Information
5202:
5203: =over 4
5204:
5205: =item *
5206: X<queryauthenticate()>
5207: B<queryauthenticate($uname,$udom)>: try to determine user's current
5208: authentication scheme
5209:
5210: =item *
5211: X<authenticate()>
5212: B<authenticate($uname,$upass,$udom)>: try to
5213: authenticate user from domain's lib servers (first use the current
5214: one). C<$upass> should be the users password.
5215:
5216: =item *
5217: X<homeserver()>
5218: B<homeserver($uname,$udom)>: find the server which has
5219: the user's directory and files (there must be only one), this caches
5220: the answer, and also caches if there is a borken connection.
5221:
5222: =item *
5223: X<idget()>
5224: B<idget($udom,@ids)>: find the usernames behind a list of IDs
5225: (IDs are a unique resource in a domain, there must be only 1 ID per
5226: username, and only 1 username per ID in a specific domain) (returns
5227: hash: id=>name,id=>name)
5228:
5229: =item *
5230: X<idrget()>
5231: B<idrget($udom,@unames)>: find the IDs behind a list of
5232: usernames (returns hash: name=>id,name=>id)
5233:
5234: =item *
5235: X<idput()>
5236: B<idput($udom,%ids)>: store away a list of names and associated IDs
5237:
5238: =item *
5239: X<rolesinit()>
5240: B<rolesinit($udom,$username,$authhost)>: get user privileges
5241:
5242: =item *
5243: X<usection()>
5244: B<usection($udom,$uname,$cname)>: finds the section of student in the
5245: course $cname, return section name/number or '' for "not in course"
5246: and '-1' for "no section"
5247:
5248: =item *
5249: X<userenvironment()>
5250: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
5251: passed in @what from the requested user's environment, returns a hash
5252:
5253: =back
5254:
5255: =head2 User Roles
5256:
5257: =over 4
5258:
5259: =item *
5260:
5261: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
5262: actions
5263: F: full access
5264: U,I,K: authentication modes (cxx only)
5265: '': forbidden
5266: 1: user needs to choose course
5267: 2: browse allowed
5268:
5269: =item *
5270:
5271: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
5272: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
5273: and course level
5274:
5275: =item *
5276:
5277: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
5278: explanation of a user role term
5279:
5280: =back
5281:
5282: =head2 User Modification
5283:
5284: =over 4
5285:
5286: =item *
5287:
5288: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
5289: user for the level given by URL. Optional start and end dates (leave empty
5290: string or zero for "no date")
5291:
5292: =item *
5293:
5294: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
5295: change a users, password, possible return values are: ok,
5296: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
5297: refused
5298:
5299: =item *
5300:
5301: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
5302:
5303: =item *
5304:
5305: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
5306: modify user
5307:
5308: =item *
5309:
5310: modifystudent
5311:
5312: modify a students enrollment and identification information.
5313: The course id is resolved based on the current users environment.
5314: This means the envoking user must be a course coordinator or otherwise
5315: associated with a course.
5316:
5317: This call is essentially a wrapper for lonnet::modifyuser and
5318: lonnet::modify_student_enrollment
5319:
5320: Inputs:
5321:
5322: =over 4
5323:
5324: =item B<$udom> Students loncapa domain
5325:
5326: =item B<$uname> Students loncapa login name
5327:
5328: =item B<$uid> Students id/student number
5329:
5330: =item B<$umode> Students authentication mode
5331:
5332: =item B<$upass> Students password
5333:
5334: =item B<$first> Students first name
5335:
5336: =item B<$middle> Students middle name
5337:
5338: =item B<$last> Students last name
5339:
5340: =item B<$gene> Students generation
5341:
5342: =item B<$usec> Students section in course
5343:
5344: =item B<$end> Unix time of the roles expiration
5345:
5346: =item B<$start> Unix time of the roles start date
5347:
5348: =item B<$forceid> If defined, allow $uid to be changed
5349:
5350: =item B<$desiredhome> server to use as home server for student
5351:
5352: =back
5353:
5354: =item *
5355:
5356: modify_student_enrollment
5357:
5358: Change a students enrollment status in a class. The environment variable
5359: 'role.request.course' must be defined for this function to proceed.
5360:
5361: Inputs:
5362:
5363: =over 4
5364:
5365: =item $udom, students domain
5366:
5367: =item $uname, students name
5368:
5369: =item $uid, students user id
5370:
5371: =item $first, students first name
5372:
5373: =item $middle
5374:
5375: =item $last
5376:
5377: =item $gene
5378:
5379: =item $usec
5380:
5381: =item $end
5382:
5383: =item $start
5384:
5385: =back
5386:
5387:
5388: =item *
5389:
5390: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
5391: custom role; give a custom role to a user for the level given by URL. Specify
5392: name and domain of role author, and role name
5393:
5394: =item *
5395:
5396: revokerole($udom,$uname,$url,$role) : revoke a role for url
5397:
5398: =item *
5399:
5400: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
5401:
5402: =back
5403:
5404: =head2 Course Infomation
5405:
5406: =over 4
5407:
5408: =item *
5409:
5410: coursedescription($courseid) : course description
5411:
5412: =item *
5413:
5414: courseresdata($coursenum,$coursedomain,@which) : request for current
5415: parameter setting for a specific course, @what should be a list of
5416: parameters to ask about. This routine caches answers for 5 minutes.
5417:
5418: =back
5419:
5420: =head2 Course Modification
5421:
5422: =over 4
5423:
5424: =item *
5425:
5426: writecoursepref($courseid,%prefs) : write preferences (environment
5427: database) for a course
5428:
5429: =item *
5430:
5431: createcourse($udom,$description,$url) : make/modify course
5432:
5433: =back
5434:
5435: =head2 Resource Subroutines
5436:
5437: =over 4
5438:
5439: =item *
5440:
5441: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
5442:
5443: =item *
5444:
5445: repcopy($filename) : subscribes to the requested file, and attempts to
5446: replicate from the owning library server, Might return
5447: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
5448: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
5449: resource. Expects the local filesystem pathname
5450: (/home/httpd/html/res/....)
5451:
5452: =back
5453:
5454: =head2 Resource Information
5455:
5456: =over 4
5457:
5458: =item *
5459:
5460: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
5461: a vairety of different possible values, $varname should be a request
5462: string, and the other parameters can be used to specify who and what
5463: one is asking about.
5464:
5465: Possible values for $varname are environment.lastname (or other item
5466: from the envirnment hash), user.name (or someother aspect about the
5467: user), resource.0.maxtries (or some other part and parameter of a
5468: resource)
5469:
5470: =item *
5471:
5472: directcondval($number) : get current value of a condition; reads from a state
5473: string
5474:
5475: =item *
5476:
5477: condval($condidx) : value of condition index based on state
5478:
5479: =item *
5480:
5481: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
5482: resource's metadata, $what should be either a specific key, or either
5483: 'keys' (to get a list of possible keys) or 'packages' to get a list of
5484: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
5485:
5486: this function automatically caches all requests
5487:
5488: =item *
5489:
5490: metadata_query($query,$custom,$customshow) : make a metadata query against the
5491: network of library servers; returns file handle of where SQL and regex results
5492: will be stored for query
5493:
5494: =item *
5495:
5496: symbread($filename) : return symbolic list entry (filename argument optional);
5497: returns the data handle
5498:
5499: =item *
5500:
5501: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
5502: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
5503: failure, user must be in a course, as it assumes the existance of the
5504: course initi hash, and uses $ENV('request.course.id'}
5505:
5506:
5507: =item *
5508:
5509: symbclean($symb) : removes versions numbers from a symb, returns the
5510: cleaned symb
5511:
5512: =item *
5513:
5514: is_on_map($uri) : checks if the $uri is somewhere on the current
5515: course map, user must be in a course for it to work.
5516:
5517: =item *
5518:
5519: numval($salt) : return random seed value (addend for rndseed)
5520:
5521: =item *
5522:
5523: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
5524: a random seed, all arguments are optional, if they aren't sent it uses the
5525: environment to derive them. Note: if symb isn't sent and it can't get one
5526: from &symbread it will use the current time as its return value
5527:
5528: =item *
5529:
5530: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
5531: unfakeable, receipt
5532:
5533: =item *
5534:
5535: receipt() : API to ireceipt working off of ENV values; given out to users
5536:
5537: =item *
5538:
5539: countacc($url) : count the number of accesses to a given URL
5540:
5541: =item *
5542:
5543: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
5544:
5545: =item *
5546:
5547: checkin($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 $tcrsid)
5548:
5549: =item *
5550:
5551: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
5552:
5553: =item *
5554:
5555: devalidate($symb) : devalidate temporary spreadsheet calculations,
5556: forcing spreadsheet to reevaluate the resource scores next time.
5557:
5558: =back
5559:
5560: =head2 Storing/Retreiving Data
5561:
5562: =over 4
5563:
5564: =item *
5565:
5566: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
5567: for this url; hashref needs to be given and should be a \%hashname; the
5568: remaining args aren't required and if they aren't passed or are '' they will
5569: be derived from the ENV
5570:
5571: =item *
5572:
5573: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
5574: uses critical subroutine
5575:
5576: =item *
5577:
5578: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
5579: all args are optional
5580:
5581: =item *
5582:
5583: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
5584: works very similar to store/cstore, but all data is stored in a
5585: temporary location and can be reset using tmpreset, $storehash should
5586: be a hash reference, returns nothing on success
5587:
5588: =item *
5589:
5590: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
5591: similar to restore, but all data is stored in a temporary location and
5592: can be reset using tmpreset. Returns a hash of values on success,
5593: error string otherwise.
5594:
5595: =item *
5596:
5597: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
5598: deltes all keys for $symb form the temporary storage hash.
5599:
5600: =item *
5601:
5602: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5603: reference filled in from namesp ($udom and $uname are optional)
5604:
5605: =item *
5606:
5607: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
5608: namesp ($udom and $uname are optional)
5609:
5610: =item *
5611:
5612: dump($namespace,$udom,$uname,$regexp) :
5613: dumps the complete (or key matching regexp) namespace into a hash
5614: ($udom, $uname and $regexp are optional)
5615:
5616: =item *
5617:
5618: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
5619: $store can be a scalar, an array reference, or if the amount to be
5620: incremented is > 1, a hash reference.
5621:
5622: ($udom and $uname are optional)
5623:
5624: =item *
5625:
5626: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
5627: ($udom and $uname are optional)
5628:
5629: =item *
5630:
5631: cput($namespace,$storehash,$udom,$uname) : critical put
5632: ($udom and $uname are optional)
5633:
5634: =item *
5635:
5636: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5637: reference filled in from namesp (encrypts the return communication)
5638: ($udom and $uname are optional)
5639:
5640: =item *
5641:
5642: log($udom,$name,$home,$message) : write to permanent log for user; use
5643: critical subroutine
5644:
5645: =back
5646:
5647: =head2 Network Status Functions
5648:
5649: =over 4
5650:
5651: =item *
5652:
5653: dirlist($uri) : return directory list based on URI
5654:
5655: =item *
5656:
5657: spareserver() : find server with least workload from spare.tab
5658:
5659: =back
5660:
5661: =head2 Apache Request
5662:
5663: =over 4
5664:
5665: =item *
5666:
5667: ssi($url,%hash) : server side include, does a complete request cycle on url to
5668: localhost, posts hash
5669:
5670: =back
5671:
5672: =head2 Data to String to Data
5673:
5674: =over 4
5675:
5676: =item *
5677:
5678: hash2str(%hash) : convert a hash into a string complete with escaping and '='
5679: and '&' separators, supports elements that are arrayrefs and hashrefs
5680:
5681: =item *
5682:
5683: hashref2str($hashref) : convert a hashref into a string complete with
5684: escaping and '=' and '&' separators, supports elements that are
5685: arrayrefs and hashrefs
5686:
5687: =item *
5688:
5689: arrayref2str($arrayref) : convert an arrayref into a string complete
5690: with escaping and '&' separators, supports elements that are arrayrefs
5691: and hashrefs
5692:
5693: =item *
5694:
5695: str2hash($string) : convert string to hash using unescaping and
5696: splitting on '=' and '&', supports elements that are arrayrefs and
5697: hashrefs
5698:
5699: =item *
5700:
5701: str2array($string) : convert string to hash using unescaping and
5702: splitting on '&', supports elements that are arrayrefs and hashrefs
5703:
5704: =back
5705:
5706: =head2 Logging Routines
5707:
5708: =over 4
5709:
5710: These routines allow one to make log messages in the lonnet.log and
5711: lonnet.perm logfiles.
5712:
5713: =item *
5714:
5715: logtouch() : make sure the logfile, lonnet.log, exists
5716:
5717: =item *
5718:
5719: logthis() : append message to the normal lonnet.log file, it gets
5720: preiodically rolled over and deleted.
5721:
5722: =item *
5723:
5724: logperm() : append a permanent message to lonnet.perm.log, this log
5725: file never gets deleted by any automated portion of the system, only
5726: messages of critical importance should go in here.
5727:
5728: =back
5729:
5730: =head2 General File Helper Routines
5731:
5732: =over 4
5733:
5734: =item *
5735:
5736: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
5737: (a) files in /uploaded
5738: (i) If a local copy of the file exists -
5739: compares modification date of local copy with last-modified date for
5740: definitive version stored on home server for course. If local copy is
5741: stale, requests a new version from the home server and stores it.
5742: If the original has been removed from the home server, then local copy
5743: is unlinked.
5744: (ii) If local copy does not exist -
5745: requests the file from the home server and stores it.
5746:
5747: If $caller is 'uploadrep':
5748: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
5749: for request for files originally uploaded via DOCS.
5750: - returns 'ok' if fresh local copy now available, -1 otherwise.
5751:
5752: Otherwise:
5753: This indicates a call from the content generation phase of the request.
5754: - returns the entire contents of the file or -1.
5755:
5756: (b) files in /res
5757: - returns the entire contents of a file or -1;
5758: it properly subscribes to and replicates the file if neccessary.
5759:
5760: =item *
5761:
5762: filelocation($dir,$file) : returns file system location of a file
5763: based on URI; meant to be "fairly clean" absolute reference, $dir is a
5764: directory that relative $file lookups are to looked in ($dir of /a/dir
5765: and a file of ../bob will become /a/bob)
5766:
5767: =item *
5768:
5769: hreflocation($dir,$file) : returns file system location or a URL; same as
5770: filelocation except for hrefs
5771:
5772: =item *
5773:
5774: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
5775:
5776: =back
5777:
5778: =head2 HTTP Helper Routines
5779:
5780: =over 4
5781:
5782: =item *
5783:
5784: escape() : unpack non-word characters into CGI-compatible hex codes
5785:
5786: =item *
5787:
5788: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
5789:
5790: =back
5791:
5792: =head1 PRIVATE SUBROUTINES
5793:
5794: =head2 Underlying communication routines (Shouldn't call)
5795:
5796: =over 4
5797:
5798: =item *
5799:
5800: subreply() : tries to pass a message to lonc, returns con_lost if incapable
5801:
5802: =item *
5803:
5804: reply() : uses subreply to send a message to remote machine, logs all failures
5805:
5806: =item *
5807:
5808: critical() : passes a critical message to another server; if cannot
5809: get through then place message in connection buffer directory and
5810: returns con_delayed, if incapable of saving message, returns
5811: con_failed
5812:
5813: =item *
5814:
5815: reconlonc() : tries to reconnect lonc client processes.
5816:
5817: =back
5818:
5819: =head2 Resource Access Logging
5820:
5821: =over 4
5822:
5823: =item *
5824:
5825: flushcourselogs() : flush (save) buffer logs and access logs
5826:
5827: =item *
5828:
5829: courselog($what) : save message for course in hash
5830:
5831: =item *
5832:
5833: courseacclog($what) : save message for course using &courselog(). Perform
5834: special processing for specific resource types (problems, exams, quizzes, etc).
5835:
5836: =item *
5837:
5838: goodbye() : flush course logs and log shutting down; it is called in srm.conf
5839: as a PerlChildExitHandler
5840:
5841: =back
5842:
5843: =head2 Other
5844:
5845: =over 4
5846:
5847: =item *
5848:
5849: symblist($mapname,%newhash) : update symbolic storage links
5850:
5851: =back
5852:
5853: =cut
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