1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.359 2003/04/03 22:17:09 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: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 3/2 Gerd Kortemeyer
51: # 3/19,3/20 Gerd Kortemeyer
52: # 5/26,5/28 Gerd Kortemeyer
53: # 5/30 H. K. Ng
54: # 6/1 Gerd Kortemeyer
55: # July Guy Albertelli
56: # 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20,9/21,9/26,
57: # 10/2 Gerd Kortemeyer
58: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
59: # 12/5 Matthew Hall
60: # 12/5 Guy Albertelli
61: # 12/6,12/7,12/12 Gerd Kortemeyer
62: # 12/21,12/22,12/27,12/28 Gerd Kortemeyer
63: # YEAR=2002
64: # 1/4,2/4,2/7 Gerd Kortemeyer
65: #
66: ###
67:
68: package Apache::lonnet;
69:
70: use strict;
71: use Apache::File;
72: use LWP::UserAgent();
73: use HTTP::Headers;
74: use vars
75: qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom
76: %libserv %pr %prp %metacache %packagetab %titlecache
77: %courselogs %accesshash %userrolehash $processmarker $dumpcount
78: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseresdatacache
79: %domaindescription %domain_auth_def %domain_auth_arg_def $tmpdir);
80: use IO::Socket;
81: use GDBM_File;
82: use Apache::Constants qw(:common :http);
83: use HTML::LCParser;
84: use Fcntl qw(:flock);
85: use Apache::loncoursedata;
86:
87: my $readit;
88:
89: # --------------------------------------------------------------------- Logging
90:
91: sub logtouch {
92: my $execdir=$perlvar{'lonDaemons'};
93: unless (-e "$execdir/logs/lonnet.log") {
94: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
95: close $fh;
96: }
97: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
98: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
99: }
100:
101: sub logthis {
102: my $message=shift;
103: my $execdir=$perlvar{'lonDaemons'};
104: my $now=time;
105: my $local=localtime($now);
106: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
107: print $fh "$local ($$): $message\n";
108: return 1;
109: }
110:
111: sub logperm {
112: my $message=shift;
113: my $execdir=$perlvar{'lonDaemons'};
114: my $now=time;
115: my $local=localtime($now);
116: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
117: print $fh "$now:$message:$local\n";
118: return 1;
119: }
120:
121: # -------------------------------------------------- Non-critical communication
122: sub subreply {
123: my ($cmd,$server)=@_;
124: my $peerfile="$perlvar{'lonSockDir'}/$server";
125: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
126: Type => SOCK_STREAM,
127: Timeout => 10)
128: or return "con_lost";
129: print $client "$cmd\n";
130: my $answer=<$client>;
131: if (!$answer) { $answer="con_lost"; }
132: chomp($answer);
133: return $answer;
134: }
135:
136: sub reply {
137: my ($cmd,$server)=@_;
138: unless (defined($hostname{$server})) { return 'no_such_host'; }
139: my $answer=subreply($cmd,$server);
140: if ($answer eq 'con_lost') {
141: #sleep 5;
142: #$answer=subreply($cmd,$server);
143: #if ($answer eq 'con_lost') {
144: # &logthis("Second attempt con_lost on $server");
145: # my $peerfile="$perlvar{'lonSockDir'}/$server";
146: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
147: # Type => SOCK_STREAM,
148: # Timeout => 10)
149: # or return "con_lost";
150: # &logthis("Killing socket");
151: # print $client "close_connection_exit\n";
152: #sleep 5;
153: # $answer=subreply($cmd,$server);
154: #}
155: }
156: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
157: &logthis("<font color=blue>WARNING:".
158: " $cmd to $server returned $answer</font>");
159: }
160: return $answer;
161: }
162:
163: # ----------------------------------------------------------- Send USR1 to lonc
164:
165: sub reconlonc {
166: my $peerfile=shift;
167: &logthis("Trying to reconnect for $peerfile");
168: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
169: if (my $fh=Apache::File->new("$loncfile")) {
170: my $loncpid=<$fh>;
171: chomp($loncpid);
172: if (kill 0 => $loncpid) {
173: &logthis("lonc at pid $loncpid responding, sending USR1");
174: kill USR1 => $loncpid;
175: sleep 1;
176: if (-e "$peerfile") { return; }
177: &logthis("$peerfile still not there, give it another try");
178: sleep 5;
179: if (-e "$peerfile") { return; }
180: &logthis(
181: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
182: } else {
183: &logthis(
184: "<font color=blue>WARNING:".
185: " lonc at pid $loncpid not responding, giving up</font>");
186: }
187: } else {
188: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
189: }
190: }
191:
192: # ------------------------------------------------------ Critical communication
193:
194: sub critical {
195: my ($cmd,$server)=@_;
196: unless ($hostname{$server}) {
197: &logthis("<font color=blue>WARNING:".
198: " Critical message to unknown server ($server)</font>");
199: return 'no_such_host';
200: }
201: my $answer=reply($cmd,$server);
202: if ($answer eq 'con_lost') {
203: my $pingreply=reply('ping',$server);
204: &reconlonc("$perlvar{'lonSockDir'}/$server");
205: my $pongreply=reply('pong',$server);
206: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
207: $answer=reply($cmd,$server);
208: if ($answer eq 'con_lost') {
209: my $now=time;
210: my $middlename=$cmd;
211: $middlename=substr($middlename,0,16);
212: $middlename=~s/\W//g;
213: my $dfilename=
214: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
215: $dumpcount++;
216: {
217: my $dfh;
218: if ($dfh=Apache::File->new(">$dfilename")) {
219: print $dfh "$cmd\n";
220: }
221: }
222: sleep 2;
223: my $wcmd='';
224: {
225: my $dfh;
226: if ($dfh=Apache::File->new("$dfilename")) {
227: $wcmd=<$dfh>;
228: }
229: }
230: chomp($wcmd);
231: if ($wcmd eq $cmd) {
232: &logthis("<font color=blue>WARNING: ".
233: "Connection buffer $dfilename: $cmd</font>");
234: &logperm("D:$server:$cmd");
235: return 'con_delayed';
236: } else {
237: &logthis("<font color=red>CRITICAL:"
238: ." Critical connection failed: $server $cmd</font>");
239: &logperm("F:$server:$cmd");
240: return 'con_failed';
241: }
242: }
243: }
244: return $answer;
245: }
246:
247: # ---------------------------------------------------------- Append Environment
248:
249: sub appenv {
250: my %newenv=@_;
251: foreach (keys %newenv) {
252: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
253: &logthis("<font color=blue>WARNING: ".
254: "Attempt to modify environment ".$_." to ".$newenv{$_}
255: .'</font>');
256: delete($newenv{$_});
257: } else {
258: $ENV{$_}=$newenv{$_};
259: }
260: }
261:
262: my $lockfh;
263: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
264: return 'error: '.$!;
265: }
266: unless (flock($lockfh,LOCK_EX)) {
267: &logthis("<font color=blue>WARNING: ".
268: 'Could not obtain exclusive lock in appenv: '.$!);
269: $lockfh->close();
270: return 'error: '.$!;
271: }
272:
273: my @oldenv;
274: {
275: my $fh;
276: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
277: return 'error: '.$!;
278: }
279: @oldenv=<$fh>;
280: $fh->close();
281: }
282: for (my $i=0; $i<=$#oldenv; $i++) {
283: chomp($oldenv[$i]);
284: if ($oldenv[$i] ne '') {
285: my ($name,$value)=split(/=/,$oldenv[$i]);
286: unless (defined($newenv{$name})) {
287: $newenv{$name}=$value;
288: }
289: }
290: }
291: {
292: my $fh;
293: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
294: return 'error';
295: }
296: my $newname;
297: foreach $newname (keys %newenv) {
298: print $fh "$newname=$newenv{$newname}\n";
299: }
300: $fh->close();
301: }
302:
303: $lockfh->close();
304: return 'ok';
305: }
306: # ----------------------------------------------------- Delete from Environment
307:
308: sub delenv {
309: my $delthis=shift;
310: my %newenv=();
311: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
312: &logthis("<font color=blue>WARNING: ".
313: "Attempt to delete from environment ".$delthis);
314: return 'error';
315: }
316: my @oldenv;
317: {
318: my $fh;
319: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
320: return 'error';
321: }
322: unless (flock($fh,LOCK_SH)) {
323: &logthis("<font color=blue>WARNING: ".
324: 'Could not obtain shared lock in delenv: '.$!);
325: $fh->close();
326: return 'error: '.$!;
327: }
328: @oldenv=<$fh>;
329: $fh->close();
330: }
331: {
332: my $fh;
333: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
334: return 'error';
335: }
336: unless (flock($fh,LOCK_EX)) {
337: &logthis("<font color=blue>WARNING: ".
338: 'Could not obtain exclusive lock in delenv: '.$!);
339: $fh->close();
340: return 'error: '.$!;
341: }
342: foreach (@oldenv) {
343: unless ($_=~/^$delthis/) { print $fh $_; }
344: }
345: $fh->close();
346: }
347: return 'ok';
348: }
349:
350: # ------------------------------------------ Fight off request when overloaded
351:
352: sub overloaderror {
353: my ($r,$checkserver)=@_;
354: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
355: my $loadavg;
356: if ($checkserver eq $perlvar{'lonHostID'}) {
357: my $loadfile=Apache::File->new('/proc/loadavg');
358: $loadavg=<$loadfile>;
359: $loadavg =~ s/\s.*//g;
360: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
361: } else {
362: $loadavg=&reply('load',$checkserver);
363: }
364: my $overload=$loadavg-100;
365: if ($overload>0) {
366: $r->err_headers_out->{'Retry-After'}=$overload;
367: $r->log_error('Overload of '.$overload.' on '.$checkserver);
368: return 413;
369: }
370: return '';
371: }
372:
373: # ------------------------------ Find server with least workload from spare.tab
374:
375: sub spareserver {
376: my $loadpercent = shift;
377: my $tryserver;
378: my $spareserver='';
379: my $lowestserver=$loadpercent;
380: foreach $tryserver (keys %spareid) {
381: my $answer=reply('load',$tryserver);
382: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
383: $spareserver="http://$hostname{$tryserver}";
384: $lowestserver=$answer;
385: }
386: }
387: return $spareserver;
388: }
389:
390: # --------------------------------------------- Try to change a user's password
391:
392: sub changepass {
393: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
394: $currentpass = &escape($currentpass);
395: $newpass = &escape($newpass);
396: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
397: $server);
398: if (! $answer) {
399: &logthis("No reply on password change request to $server ".
400: "by $uname in domain $udom.");
401: } elsif ($answer =~ "^ok") {
402: &logthis("$uname in $udom successfully changed their password ".
403: "on $server.");
404: } elsif ($answer =~ "^pwchange_failure") {
405: &logthis("$uname in $udom was unable to change their password ".
406: "on $server. The action was blocked by either lcpasswd ".
407: "or pwchange");
408: } elsif ($answer =~ "^non_authorized") {
409: &logthis("$uname in $udom did not get their password correct when ".
410: "attempting to change it on $server.");
411: } elsif ($answer =~ "^auth_mode_error") {
412: &logthis("$uname in $udom attempted to change their password despite ".
413: "not being locally or internally authenticated on $server.");
414: } elsif ($answer =~ "^unknown_user") {
415: &logthis("$uname in $udom attempted to change their password ".
416: "on $server but were unable to because $server is not ".
417: "their home server.");
418: } elsif ($answer =~ "^refused") {
419: &logthis("$server refused to change $uname in $udom password because ".
420: "it was sent an unencrypted request to change the password.");
421: }
422: return $answer;
423: }
424:
425: # ----------------------- Try to determine user's current authentication scheme
426:
427: sub queryauthenticate {
428: my ($uname,$udom)=@_;
429: if (($perlvar{'lonRole'} eq 'library') &&
430: ($udom eq $perlvar{'lonDefDomain'})) {
431: my $answer=reply("encrypt:currentauth:$udom:$uname",
432: $perlvar{'lonHostID'});
433: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
434: if (length($answer)) {
435: return $answer;
436: }
437: else {
438: &logthis("User $uname at $udom lacks an authentication mechanism");
439: return 'no_host';
440: }
441: }
442: }
443:
444: my $tryserver;
445: foreach $tryserver (keys %libserv) {
446: if ($hostdom{$tryserver} eq $udom) {
447: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
448: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
449: if (length($answer)) {
450: return $answer;
451: }
452: else {
453: &logthis("User $uname at $udom lacks an authentication mechanism");
454: return 'no_host';
455: }
456: }
457: }
458: }
459: &logthis("User $uname at $udom lacks an authentication mechanism");
460: return 'no_host';
461: }
462:
463: # --------- Try to authenticate user from domain's lib servers (first this one)
464:
465: sub authenticate {
466: my ($uname,$upass,$udom)=@_;
467: $upass=escape($upass);
468: $uname=~s/\W//g;
469: if (($perlvar{'lonRole'} eq 'library') &&
470: ($udom eq $perlvar{'lonDefDomain'})) {
471: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
472: if ($answer =~ /authorized/) {
473: if ($answer eq 'authorized') {
474: &logthis("User $uname at $udom authorized by local server");
475: return $perlvar{'lonHostID'};
476: }
477: if ($answer eq 'non_authorized') {
478: &logthis("User $uname at $udom rejected by local server");
479: return 'no_host';
480: }
481: }
482: }
483:
484: my $tryserver;
485: foreach $tryserver (keys %libserv) {
486: if ($hostdom{$tryserver} eq $udom) {
487: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
488: if ($answer =~ /authorized/) {
489: if ($answer eq 'authorized') {
490: &logthis("User $uname at $udom authorized by $tryserver");
491: return $tryserver;
492: }
493: if ($answer eq 'non_authorized') {
494: &logthis("User $uname at $udom rejected by $tryserver");
495: return 'no_host';
496: }
497: }
498: }
499: }
500: &logthis("User $uname at $udom could not be authenticated");
501: return 'no_host';
502: }
503:
504: # ---------------------- Find the homebase for a user from domain's lib servers
505:
506: sub homeserver {
507: my ($uname,$udom,$ignoreBadCache)=@_;
508: my $index="$uname:$udom";
509: if ($homecache{$index}) {
510: return "$homecache{$index}";
511: }
512: my $tryserver;
513: foreach $tryserver (keys %libserv) {
514: next if ($ignoreBadCache ne 'true' &&
515: exists($badServerCache{$tryserver}));
516: if ($hostdom{$tryserver} eq $udom) {
517: my $answer=reply("home:$udom:$uname",$tryserver);
518: if ($answer eq 'found') {
519: $homecache{$index}=$tryserver;
520: return $tryserver;
521: } elsif ($answer eq 'no_host') {
522: $badServerCache{$tryserver}=1;
523: }
524: }
525: }
526: return 'no_host';
527: }
528:
529: # ------------------------------------- Find the usernames behind a list of IDs
530:
531: sub idget {
532: my ($udom,@ids)=@_;
533: my %returnhash=();
534:
535: my $tryserver;
536: foreach $tryserver (keys %libserv) {
537: if ($hostdom{$tryserver} eq $udom) {
538: my $idlist=join('&',@ids);
539: $idlist=~tr/A-Z/a-z/;
540: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
541: my @answer=();
542: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
543: @answer=split(/\&/,$reply);
544: } ;
545: my $i;
546: for ($i=0;$i<=$#ids;$i++) {
547: if ($answer[$i]) {
548: $returnhash{$ids[$i]}=$answer[$i];
549: }
550: }
551: }
552: }
553: return %returnhash;
554: }
555:
556: # ------------------------------------- Find the IDs behind a list of usernames
557:
558: sub idrget {
559: my ($udom,@unames)=@_;
560: my %returnhash=();
561: foreach (@unames) {
562: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
563: }
564: return %returnhash;
565: }
566:
567: # ------------------------------- Store away a list of names and associated IDs
568:
569: sub idput {
570: my ($udom,%ids)=@_;
571: my %servers=();
572: foreach (keys %ids) {
573: my $uhom=&homeserver($_,$udom);
574: if ($uhom ne 'no_host') {
575: my $id=&escape($ids{$_});
576: $id=~tr/A-Z/a-z/;
577: my $unam=&escape($_);
578: if ($servers{$uhom}) {
579: $servers{$uhom}.='&'.$id.'='.$unam;
580: } else {
581: $servers{$uhom}=$id.'='.$unam;
582: }
583: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
584: }
585: }
586: foreach (keys %servers) {
587: &critical('idput:'.$udom.':'.$servers{$_},$_);
588: }
589: }
590:
591: # --------------------------------------------------- Assign a key to a student
592:
593: sub assign_access_key {
594: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
595: $cdom=
596: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
597: $cnum=
598: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
599: $udom=$ENV{'user.name'} unless (defined($udom));
600: $uname=$ENV{'user.domain'} unless (defined($uname));
601: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
602: if (($existing{$ckey}=~/^\d+$/) || # has time - new key
603: ($existing{$ckey} eq $uname.':'.$udom)) { # this should not happen,
604: # unless something went wrong
605: # the first time around
606: # ready to assign
607: } elsif (!$existing{$ckey}) {
608: if (&put('accesskey',{$ckey=>$uname.':'.$udom},$cdom,$cnum) eq 'ok') {
609: # key now belongs to user
610: my $envkey='key.'.$cdom.'_'.$cnum;
611: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
612: &appenv('environment.'.$envkey => $ckey);
613: return 'ok';
614: } else {
615: return
616: 'error: Count not permanently assign key, will need to be re-entered later.';
617: }
618: } else {
619: return 'error: Could not assign key, try again later.';
620: }
621: # the key does not exist
622: return 'error: The key does not exist';
623: } else {
624: # the key is somebody else's
625: return 'error: The key is already in use';
626: }
627: }
628:
629: # ------------------------------------------------------ Generate a set of keys
630:
631: sub generate_access_keys {
632: my ($number,$cdom,$cnum)=@_;
633: $cdom=
634: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
635: $cnum=
636: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
637: unless (&allowed('ccc',$cdom)) { return 0; }
638: unless (($cdom) && ($cnum)) { return 0; }
639: if ($number>10000) { return 0; }
640: sleep(2); # make sure don't get same seed twice
641: srand(time()^($$+($$<<15))); # from "Programming Perl"
642: my $total=0;
643: for (my $i=1;$i<=$number;$i++) {
644: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
645: sprintf("%lx",int(100000*rand)).'-'.
646: sprintf("%lx",int(100000*rand));
647: $newkey=~s/1/g/g; # folks mix up 1 and l
648: $newkey=~s/0/h/g; # and also 0 and O
649: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
650: if ($existing{$newkey}) {
651: $i--;
652: } else {
653: if (&put('accesskeys',{ $newkey => time() },$cdom,$cnum) eq 'ok') {
654: $total++;
655: }
656: }
657: }
658: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
659: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
660: return $total;
661: }
662:
663: # ------------------------------------------------------- Validate an accesskey
664:
665: sub validate_access_key {
666: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
667: $cdom=
668: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
669: $cnum=
670: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
671: $udom=$ENV{'user.name'} unless (defined($udom));
672: $uname=$ENV{'user.domain'} unless (defined($uname));
673: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
674: return ($existing{$ckey} eq $uname.':'.$udom);
675: }
676:
677: # ------------------------------------- Find the section of student in a course
678:
679: sub getsection {
680: my ($udom,$unam,$courseid)=@_;
681: $courseid=~s/\_/\//g;
682: $courseid=~s/^(\w)/\/$1/;
683: my %Pending;
684: my %Expired;
685: #
686: # Each role can either have not started yet (pending), be active,
687: # or have expired.
688: #
689: # If there is an active role, we are done.
690: #
691: # If there is more than one role which has not started yet,
692: # choose the one which will start sooner
693: # If there is one role which has not started yet, return it.
694: #
695: # If there is more than one expired role, choose the one which ended last.
696: # If there is a role which has expired, return it.
697: #
698: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
699: &homeserver($unam,$udom)))) {
700: my ($key,$value)=split(/\=/,$_);
701: $key=&unescape($key);
702: next if ($key !~/^$courseid(?:\/)*(\w+)*\_st$/);
703: my $section=$1;
704: if ($key eq $courseid.'_st') { $section=''; }
705: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
706: my $now=time;
707: if (defined($end) && ($now > $end)) {
708: $Expired{$end}=$section;
709: next;
710: }
711: if (defined($start) && ($now < $start)) {
712: $Pending{$start}=$section;
713: next;
714: }
715: return $section;
716: }
717: #
718: # Presumedly there will be few matching roles from the above
719: # loop and the sorting time will be negligible.
720: if (scalar(keys(%Pending))) {
721: my ($time) = sort {$a <=> $b} keys(%Pending);
722: return $Pending{$time};
723: }
724: if (scalar(keys(%Expired))) {
725: my @sorted = sort {$a <=> $b} keys(%Expired);
726: my $time = pop(@sorted);
727: return $Expired{$time};
728: }
729: return '-1';
730: }
731:
732: sub usection {
733: my ($udom,$unam,$courseid)=@_;
734: $courseid=~s/\_/\//g;
735: $courseid=~s/^(\w)/\/$1/;
736: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
737: &homeserver($unam,$udom)))) {
738: my ($key,$value)=split(/\=/,$_);
739: $key=&unescape($key);
740: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
741: my $section=$1;
742: if ($key eq $courseid.'_st') { $section=''; }
743: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
744: my $now=time;
745: my $notactive=0;
746: if ($start) {
747: if ($now<$start) { $notactive=1; }
748: }
749: if ($end) {
750: if ($now>$end) { $notactive=1; }
751: }
752: unless ($notactive) { return $section; }
753: }
754: }
755: return '-1';
756: }
757:
758: # ------------------------------------- Read an entry from a user's environment
759:
760: sub userenvironment {
761: my ($udom,$unam,@what)=@_;
762: my %returnhash=();
763: my @answer=split(/\&/,
764: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
765: &homeserver($unam,$udom)));
766: my $i;
767: for ($i=0;$i<=$#what;$i++) {
768: $returnhash{$what[$i]}=&unescape($answer[$i]);
769: }
770: return %returnhash;
771: }
772:
773: # -------------------------------------------------------------------- New chat
774:
775: sub chatsend {
776: my ($newentry,$anon)=@_;
777: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
778: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
779: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
780: &reply('chatsend:'.$cdom.':'.$cnum.':'.
781: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
782: &escape($newentry)),$chome);
783: }
784:
785: # ------------------------------------------ Find current version of a resource
786:
787: sub getversion {
788: my $fname=&clutter(shift);
789: unless ($fname=~/^\/res\//) { return -1; }
790: return ¤tversion(&filelocation('',$fname));
791: }
792:
793: sub currentversion {
794: my $fname=shift;
795: my $author=$fname;
796: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
797: my ($udom,$uname)=split(/\//,$author);
798: my $home=homeserver($uname,$udom);
799: if ($home eq 'no_host') {
800: return -1;
801: }
802: my $answer=reply("currentversion:$fname",$home);
803: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
804: return -1;
805: }
806: return $answer;
807: }
808:
809: # ----------------------------- Subscribe to a resource, return URL if possible
810:
811: sub subscribe {
812: my $fname=shift;
813: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
814: my $author=$fname;
815: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
816: my ($udom,$uname)=split(/\//,$author);
817: my $home=homeserver($uname,$udom);
818: if ($home eq 'no_host') {
819: return 'not_found';
820: }
821: my $answer=reply("sub:$fname",$home);
822: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
823: $answer.=' by '.$home;
824: }
825: return $answer;
826: }
827:
828: # -------------------------------------------------------------- Replicate file
829:
830: sub repcopy {
831: my $filename=shift;
832: $filename=~s/\/+/\//g;
833: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
834: my $transname="$filename.in.transfer";
835: if ((-e $filename) || (-e $transname)) { return OK; }
836: my $remoteurl=subscribe($filename);
837: if ($remoteurl =~ /^con_lost by/) {
838: &logthis("Subscribe returned $remoteurl: $filename");
839: return HTTP_SERVICE_UNAVAILABLE;
840: } elsif ($remoteurl eq 'not_found') {
841: &logthis("Subscribe returned not_found: $filename");
842: return HTTP_NOT_FOUND;
843: } elsif ($remoteurl =~ /^rejected by/) {
844: &logthis("Subscribe returned $remoteurl: $filename");
845: return FORBIDDEN;
846: } elsif ($remoteurl eq 'directory') {
847: return OK;
848: } else {
849: my $author=$filename;
850: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
851: my ($udom,$uname)=split(/\//,$author);
852: my $home=homeserver($uname,$udom);
853: unless ($home eq $perlvar{'lonHostID'}) {
854: my @parts=split(/\//,$filename);
855: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
856: if ($path ne "$perlvar{'lonDocRoot'}/res") {
857: &logthis("Malconfiguration for replication: $filename");
858: return HTTP_BAD_REQUEST;
859: }
860: my $count;
861: for ($count=5;$count<$#parts;$count++) {
862: $path.="/$parts[$count]";
863: if ((-e $path)!=1) {
864: mkdir($path,0777);
865: }
866: }
867: my $ua=new LWP::UserAgent;
868: my $request=new HTTP::Request('GET',"$remoteurl");
869: my $response=$ua->request($request,$transname);
870: if ($response->is_error()) {
871: unlink($transname);
872: my $message=$response->status_line;
873: &logthis("<font color=blue>WARNING:"
874: ." LWP get: $message: $filename</font>");
875: return HTTP_SERVICE_UNAVAILABLE;
876: } else {
877: if ($remoteurl!~/\.meta$/) {
878: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
879: my $mresponse=$ua->request($mrequest,$filename.'.meta');
880: if ($mresponse->is_error()) {
881: unlink($filename.'.meta');
882: &logthis(
883: "<font color=yellow>INFO: No metadata: $filename</font>");
884: }
885: }
886: rename($transname,$filename);
887: return OK;
888: }
889: }
890: }
891: }
892:
893: # ------------------------------------------------ Get server side include body
894: sub ssi_body {
895: my $filelink=shift;
896: my $output=($filelink=~/^http\:/?&externalssi($filelink):
897: &ssi($filelink));
898: $output=~s/^.*\<body[^\>]*\>//si;
899: $output=~s/\<\/body\s*\>.*$//si;
900: $output=~
901: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
902: return $output;
903: }
904:
905: # --------------------------------------------------------- Server Side Include
906:
907: sub ssi {
908:
909: my ($fn,%form)=@_;
910:
911: my $ua=new LWP::UserAgent;
912:
913: my $request;
914:
915: if (%form) {
916: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
917: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
918: } else {
919: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
920: }
921:
922: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
923: my $response=$ua->request($request);
924:
925: return $response->content;
926: }
927:
928: sub externalssi {
929: my ($url)=@_;
930: my $ua=new LWP::UserAgent;
931: my $request=new HTTP::Request('GET',$url);
932: my $response=$ua->request($request);
933: return $response->content;
934: }
935:
936: # ------- Add a token to a remote URI's query string to vouch for access rights
937:
938: sub tokenwrapper {
939: my $uri=shift;
940: $uri=~s/^http\:\/\/([^\/]+)//;
941: $uri=~s/^\///;
942: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
943: my $token=$1;
944: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
945: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
946: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
947: (($uri=~/\?/)?'&':'?').'token='.$token.
948: '&tokenissued='.$perlvar{'lonHostID'};
949: } else {
950: return '/adm/notfound.html';
951: }
952: }
953:
954: # --------------- Take an uploaded file and put it into the userfiles directory
955: # input: name of form element, coursedoc=1 means this is for the course
956: # output: url of file in userspace
957:
958: sub userfileupload {
959: my ($formname,$coursedoc)=@_;
960: my $fname=$ENV{'form.'.$formname.'.filename'};
961: # Replace Windows backslashes by forward slashes
962: $fname=~s/\\/\//g;
963: # Get rid of everything but the actual filename
964: $fname=~s/^.*\/([^\/]+)$/$1/;
965: # Replace spaces by underscores
966: $fname=~s/\s+/\_/g;
967: # Replace all other weird characters by nothing
968: $fname=~s/[^\w\.\-]//g;
969: # See if there is anything left
970: unless ($fname) { return 'error: no uploaded file'; }
971: chop($ENV{'form.'.$formname});
972: # Create the directory if not present
973: my $docuname='';
974: my $docudom='';
975: my $docuhome='';
976: if ($coursedoc) {
977: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
978: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
979: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
980: } else {
981: $docuname=$ENV{'user.name'};
982: $docudom=$ENV{'user.domain'};
983: $docuhome=$ENV{'user.home'};
984: }
985: return
986: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
987: }
988:
989: sub finishuserfileupload {
990: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
991: my $path=$docudom.'/'.$docuname.'/';
992: my $filepath=$perlvar{'lonDocRoot'};
993: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
994: my $count;
995: for ($count=4;$count<=$#parts;$count++) {
996: $filepath.="/$parts[$count]";
997: if ((-e $filepath)!=1) {
998: mkdir($filepath,0777);
999: }
1000: }
1001: # Save the file
1002: {
1003: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
1004: print $fh $ENV{'form.'.$formname};
1005: }
1006: # Notify homeserver to grep it
1007: #
1008:
1009: my $fetchresult=
1010: &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
1011: if ($fetchresult eq 'ok') {
1012: #
1013: # Return the URL to it
1014: return '/uploaded/'.$path.$fname;
1015: } else {
1016: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
1017: ' to host '.$docuhome.': '.$fetchresult);
1018: return '/adm/notfound.html';
1019: }
1020: }
1021:
1022: # ------------------------------------------------------------------------- Log
1023:
1024: sub log {
1025: my ($dom,$nam,$hom,$what)=@_;
1026: return critical("log:$dom:$nam:$what",$hom);
1027: }
1028:
1029: # ------------------------------------------------------------------ Course Log
1030: #
1031: # This routine flushes several buffers of non-mission-critical nature
1032: #
1033:
1034: sub flushcourselogs {
1035: &logthis('Flushing log buffers');
1036: #
1037: # course logs
1038: # This is a log of all transactions in a course, which can be used
1039: # for data mining purposes
1040: #
1041: # It also collects the courseid database, which lists last transaction
1042: # times and course titles for all courseids
1043: #
1044: my %courseidbuffer=();
1045: foreach (keys %courselogs) {
1046: my $crsid=$_;
1047: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1048: &escape($courselogs{$crsid}),
1049: $coursehombuf{$crsid}) eq 'ok') {
1050: delete $courselogs{$crsid};
1051: } else {
1052: &logthis('Failed to flush log buffer for '.$crsid);
1053: if (length($courselogs{$crsid})>40000) {
1054: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1055: " exceeded maximum size, deleting.</font>");
1056: delete $courselogs{$crsid};
1057: }
1058: }
1059: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1060: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1061: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1062: } else {
1063: $courseidbuffer{$coursehombuf{$crsid}}=
1064: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1065: }
1066: }
1067: #
1068: # Write course id database (reverse lookup) to homeserver of courses
1069: # Is used in pickcourse
1070: #
1071: foreach (keys %courseidbuffer) {
1072: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1073: }
1074: #
1075: # File accesses
1076: # Writes to the dynamic metadata of resources to get hit counts, etc.
1077: #
1078: foreach (keys %accesshash) {
1079: my $entry=$_;
1080: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
1081: my %temphash=($entry => $accesshash{$entry});
1082: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
1083: delete $accesshash{$entry};
1084: }
1085: }
1086: #
1087: # Roles
1088: # Reverse lookup of user roles for course faculty/staff and co-authorship
1089: #
1090: foreach (keys %userrolehash) {
1091: my $entry=$_;
1092: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1093: split(/\:/,$entry);
1094: if (&Apache::lonnet::put('nohist_userroles',
1095: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1096: $rudom,$runame) eq 'ok') {
1097: delete $userrolehash{$entry};
1098: }
1099: }
1100: $dumpcount++;
1101: }
1102:
1103: sub courselog {
1104: my $what=shift;
1105: $what=time.':'.$what;
1106: unless ($ENV{'request.course.id'}) { return ''; }
1107: $coursedombuf{$ENV{'request.course.id'}}=
1108: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1109: $coursenumbuf{$ENV{'request.course.id'}}=
1110: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1111: $coursehombuf{$ENV{'request.course.id'}}=
1112: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1113: $coursedescrbuf{$ENV{'request.course.id'}}=
1114: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1115: if (defined $courselogs{$ENV{'request.course.id'}}) {
1116: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1117: } else {
1118: $courselogs{$ENV{'request.course.id'}}.=$what;
1119: }
1120: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1121: &flushcourselogs();
1122: }
1123: }
1124:
1125: sub courseacclog {
1126: my $fnsymb=shift;
1127: unless ($ENV{'request.course.id'}) { return ''; }
1128: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1129: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
1130: $what.=':POST';
1131: foreach (keys %ENV) {
1132: if ($_=~/^form\.(.*)/) {
1133: $what.=':'.$1.'='.$ENV{$_};
1134: }
1135: }
1136: }
1137: &courselog($what);
1138: }
1139:
1140: sub countacc {
1141: my $url=&declutter(shift);
1142: unless ($ENV{'request.course.id'}) { return ''; }
1143: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1144: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1145: if (defined($accesshash{$key})) {
1146: $accesshash{$key}++;
1147: } else {
1148: $accesshash{$key}=1;
1149: }
1150: }
1151:
1152: sub userrolelog {
1153: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1154: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1155: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1156: ($trole=~/^cr/)) {
1157: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1158: $userrolehash
1159: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1160: =$tend.':'.$tstart;
1161: }
1162: }
1163:
1164: sub get_course_adv_roles {
1165: my $cid=shift;
1166: $cid=$ENV{'request.course.id'} unless (defined($cid));
1167: my %coursehash=&coursedescription($cid);
1168: my %returnhash=();
1169: my %dumphash=
1170: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1171: my $now=time;
1172: foreach (keys %dumphash) {
1173: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1174: if (($tstart) && ($tstart<0)) { next; }
1175: if (($tend) && ($tend<$now)) { next; }
1176: if (($tstart) && ($now<$tstart)) { next; }
1177: my ($role,$username,$domain,$section)=split(/\:/,$_);
1178: my $key=&plaintext($role);
1179: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1180: if ($returnhash{$key}) {
1181: $returnhash{$key}.=','.$username.':'.$domain;
1182: } else {
1183: $returnhash{$key}=$username.':'.$domain;
1184: }
1185: }
1186: return sort %returnhash;
1187: }
1188:
1189: # ---------------------------------------------------------- Course ID routines
1190: # Deal with domain's nohist_courseid.db files
1191: #
1192:
1193: sub courseidput {
1194: my ($domain,$what,$coursehome)=@_;
1195: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1196: }
1197:
1198: sub courseiddump {
1199: my ($domfilter,$descfilter,$sincefilter)=@_;
1200: my %returnhash=();
1201: unless ($domfilter) { $domfilter=''; }
1202: foreach my $tryserver (keys %libserv) {
1203: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1204: foreach (
1205: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1206: $sincefilter.':'.&escape($descfilter),
1207: $tryserver))) {
1208: my ($key,$value)=split(/\=/,$_);
1209: if (($key) && ($value)) {
1210: $returnhash{&unescape($key)}=&unescape($value);
1211: }
1212: }
1213:
1214: }
1215: }
1216: return %returnhash;
1217: }
1218:
1219: #
1220: # ----------------------------------------------------------- Check out an item
1221:
1222: sub checkout {
1223: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1224: my $now=time;
1225: my $lonhost=$perlvar{'lonHostID'};
1226: my $infostr=&escape(
1227: 'CHECKOUTTOKEN&'.
1228: $tuname.'&'.
1229: $tudom.'&'.
1230: $tcrsid.'&'.
1231: $symb.'&'.
1232: $now.'&'.$ENV{'REMOTE_ADDR'});
1233: my $token=&reply('tmpput:'.$infostr,$lonhost);
1234: if ($token=~/^error\:/) {
1235: &logthis("<font color=blue>WARNING: ".
1236: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1237: "</font>");
1238: return '';
1239: }
1240:
1241: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1242: $token=~tr/a-z/A-Z/;
1243:
1244: my %infohash=('resource.0.outtoken' => $token,
1245: 'resource.0.checkouttime' => $now,
1246: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1247:
1248: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1249: return '';
1250: } else {
1251: &logthis("<font color=blue>WARNING: ".
1252: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1253: "</font>");
1254: }
1255:
1256: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1257: &escape('Checkout '.$infostr.' - '.
1258: $token)) ne 'ok') {
1259: return '';
1260: } else {
1261: &logthis("<font color=blue>WARNING: ".
1262: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1263: "</font>");
1264: }
1265: return $token;
1266: }
1267:
1268: # ------------------------------------------------------------ Check in an item
1269:
1270: sub checkin {
1271: my $token=shift;
1272: my $now=time;
1273: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1274: $lonhost=~tr/A-Z/a-z/;
1275: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1276: $dtoken=~s/\W/\_/g;
1277: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1278: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1279:
1280: unless (($tuname) && ($tudom)) {
1281: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1282: return '';
1283: }
1284:
1285: unless (&allowed('mgr',$tcrsid)) {
1286: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1287: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1288: return '';
1289: }
1290:
1291: my %infohash=('resource.0.intoken' => $token,
1292: 'resource.0.checkintime' => $now,
1293: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1294:
1295: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1296: return '';
1297: }
1298:
1299: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1300: &escape('Checkin - '.$token)) ne 'ok') {
1301: return '';
1302: }
1303:
1304: return ($symb,$tuname,$tudom,$tcrsid);
1305: }
1306:
1307: # --------------------------------------------- Set Expire Date for Spreadsheet
1308:
1309: sub expirespread {
1310: my ($uname,$udom,$stype,$usymb)=@_;
1311: my $cid=$ENV{'request.course.id'};
1312: if ($cid) {
1313: my $now=time;
1314: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1315: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1316: $ENV{'course.'.$cid.'.num'}.
1317: ':nohist_expirationdates:'.
1318: &escape($key).'='.$now,
1319: $ENV{'course.'.$cid.'.home'})
1320: }
1321: return 'ok';
1322: }
1323:
1324: # ----------------------------------------------------- Devalidate Spreadsheets
1325:
1326: sub devalidate {
1327: my ($symb,$uname,$udom)=@_;
1328: my $cid=$ENV{'request.course.id'};
1329: if ($cid) {
1330: # delete the stored spreadsheets for
1331: # - the student level sheet of this user in course's homespace
1332: # - the assessment level sheet for this resource
1333: # for this user in user's homespace
1334: my $key=$uname.':'.$udom.':';
1335: my $status=
1336: &del('nohist_calculatedsheets',
1337: [$key.'studentcalc'],
1338: $ENV{'course.'.$cid.'.domain'},
1339: $ENV{'course.'.$cid.'.num'})
1340: .' '.
1341: &del('nohist_calculatedsheets_'.$cid,
1342: [$key.'assesscalc:'.$symb]);
1343: unless ($status eq 'ok ok') {
1344: &logthis('Could not devalidate spreadsheet '.
1345: $uname.' at '.$udom.' for '.
1346: $symb.': '.$status);
1347: }
1348: }
1349: }
1350:
1351: sub get_scalar {
1352: my ($string,$end) = @_;
1353: my $value;
1354: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1355: $value = $1;
1356: } elsif ($$string =~ s/^([^&]*?)&//) {
1357: $value = $1;
1358: }
1359: return &unescape($value);
1360: }
1361:
1362: sub array2str {
1363: my (@array) = @_;
1364: my $result=&arrayref2str(\@array);
1365: $result=~s/^__ARRAY_REF__//;
1366: $result=~s/__END_ARRAY_REF__$//;
1367: return $result;
1368: }
1369:
1370: sub arrayref2str {
1371: my ($arrayref) = @_;
1372: my $result='__ARRAY_REF__';
1373: foreach my $elem (@$arrayref) {
1374: if(ref($elem) eq 'ARRAY') {
1375: $result.=&arrayref2str($elem).'&';
1376: } elsif(ref($elem) eq 'HASH') {
1377: $result.=&hashref2str($elem).'&';
1378: } elsif(ref($elem)) {
1379: #print("Got a ref of ".(ref($elem))." skipping.");
1380: } else {
1381: $result.=&escape($elem).'&';
1382: }
1383: }
1384: $result=~s/\&$//;
1385: $result .= '__END_ARRAY_REF__';
1386: return $result;
1387: }
1388:
1389: sub hash2str {
1390: my (%hash) = @_;
1391: my $result=&hashref2str(\%hash);
1392: $result=~s/^__HASH_REF__//;
1393: $result=~s/__END_HASH_REF__$//;
1394: return $result;
1395: }
1396:
1397: sub hashref2str {
1398: my ($hashref)=@_;
1399: my $result='__HASH_REF__';
1400: foreach (keys(%$hashref)) {
1401: if (ref($_) eq 'ARRAY') {
1402: $result.=&arrayref2str($_).'=';
1403: } elsif (ref($_) eq 'HASH') {
1404: $result.=&hashref2str($_).'=';
1405: } elsif (ref($_)) {
1406: $result.='=';
1407: #print("Got a ref of ".(ref($_))." skipping.");
1408: } else {
1409: if ($_) {$result.=&escape($_).'=';} else { last; }
1410: }
1411:
1412: if(ref($hashref->{$_}) eq 'ARRAY') {
1413: $result.=&arrayref2str($hashref->{$_}).'&';
1414: } elsif(ref($hashref->{$_}) eq 'HASH') {
1415: $result.=&hashref2str($hashref->{$_}).'&';
1416: } elsif(ref($hashref->{$_})) {
1417: $result.='&';
1418: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1419: } else {
1420: $result.=&escape($hashref->{$_}).'&';
1421: }
1422: }
1423: $result=~s/\&$//;
1424: $result .= '__END_HASH_REF__';
1425: return $result;
1426: }
1427:
1428: sub str2hash {
1429: my ($string)=@_;
1430: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1431: return %$hash;
1432: }
1433:
1434: sub str2hashref {
1435: my ($string) = @_;
1436:
1437: my %hash;
1438:
1439: if($string !~ /^__HASH_REF__/) {
1440: if (! ($string eq '' || !defined($string))) {
1441: $hash{'error'}='Not hash reference';
1442: }
1443: return (\%hash, $string);
1444: }
1445:
1446: $string =~ s/^__HASH_REF__//;
1447:
1448: while($string !~ /^__END_HASH_REF__/) {
1449: #key
1450: my $key='';
1451: if($string =~ /^__HASH_REF__/) {
1452: ($key, $string)=&str2hashref($string);
1453: if(defined($key->{'error'})) {
1454: $hash{'error'}='Bad data';
1455: return (\%hash, $string);
1456: }
1457: } elsif($string =~ /^__ARRAY_REF__/) {
1458: ($key, $string)=&str2arrayref($string);
1459: if($key->[0] eq 'Array reference error') {
1460: $hash{'error'}='Bad data';
1461: return (\%hash, $string);
1462: }
1463: } else {
1464: $string =~ s/^(.*?)=//;
1465: $key=&unescape($1);
1466: }
1467: $string =~ s/^=//;
1468:
1469: #value
1470: my $value='';
1471: if($string =~ /^__HASH_REF__/) {
1472: ($value, $string)=&str2hashref($string);
1473: if(defined($value->{'error'})) {
1474: $hash{'error'}='Bad data';
1475: return (\%hash, $string);
1476: }
1477: } elsif($string =~ /^__ARRAY_REF__/) {
1478: ($value, $string)=&str2arrayref($string);
1479: if($value->[0] eq 'Array reference error') {
1480: $hash{'error'}='Bad data';
1481: return (\%hash, $string);
1482: }
1483: } else {
1484: $value=&get_scalar(\$string,'__END_HASH_REF__');
1485: }
1486: $string =~ s/^&//;
1487:
1488: $hash{$key}=$value;
1489: }
1490:
1491: $string =~ s/^__END_HASH_REF__//;
1492:
1493: return (\%hash, $string);
1494: }
1495:
1496: sub str2array {
1497: my ($string)=@_;
1498: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1499: return @$array;
1500: }
1501:
1502: sub str2arrayref {
1503: my ($string) = @_;
1504: my @array;
1505:
1506: if($string !~ /^__ARRAY_REF__/) {
1507: if (! ($string eq '' || !defined($string))) {
1508: $array[0]='Array reference error';
1509: }
1510: return (\@array, $string);
1511: }
1512:
1513: $string =~ s/^__ARRAY_REF__//;
1514:
1515: while($string !~ /^__END_ARRAY_REF__/) {
1516: my $value='';
1517: if($string =~ /^__HASH_REF__/) {
1518: ($value, $string)=&str2hashref($string);
1519: if(defined($value->{'error'})) {
1520: $array[0] ='Array reference error';
1521: return (\@array, $string);
1522: }
1523: } elsif($string =~ /^__ARRAY_REF__/) {
1524: ($value, $string)=&str2arrayref($string);
1525: if($value->[0] eq 'Array reference error') {
1526: $array[0] ='Array reference error';
1527: return (\@array, $string);
1528: }
1529: } else {
1530: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1531: }
1532: $string =~ s/^&//;
1533:
1534: push(@array, $value);
1535: }
1536:
1537: $string =~ s/^__END_ARRAY_REF__//;
1538:
1539: return (\@array, $string);
1540: }
1541:
1542: # -------------------------------------------------------------------Temp Store
1543:
1544: sub tmpreset {
1545: my ($symb,$namespace,$domain,$stuname) = @_;
1546: if (!$symb) {
1547: $symb=&symbread();
1548: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1549: }
1550: $symb=escape($symb);
1551:
1552: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1553: $namespace=~s/\//\_/g;
1554: $namespace=~s/\W//g;
1555:
1556: #FIXME needs to do something for /pub resources
1557: if (!$domain) { $domain=$ENV{'user.domain'}; }
1558: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1559: my $path=$perlvar{'lonDaemons'}.'/tmp';
1560: my %hash;
1561: if (tie(%hash,'GDBM_File',
1562: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1563: &GDBM_WRCREAT(),0640)) {
1564: foreach my $key (keys %hash) {
1565: if ($key=~ /:$symb/) {
1566: delete($hash{$key});
1567: }
1568: }
1569: }
1570: }
1571:
1572: sub tmpstore {
1573: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1574:
1575: if (!$symb) {
1576: $symb=&symbread();
1577: if (!$symb) { $symb= $ENV{'request.url'}; }
1578: }
1579: $symb=escape($symb);
1580:
1581: if (!$namespace) {
1582: # I don't think we would ever want to store this for a course.
1583: # it seems this will only be used if we don't have a course.
1584: #$namespace=$ENV{'request.course.id'};
1585: #if (!$namespace) {
1586: $namespace=$ENV{'request.state'};
1587: #}
1588: }
1589: $namespace=~s/\//\_/g;
1590: $namespace=~s/\W//g;
1591: #FIXME needs to do something for /pub resources
1592: if (!$domain) { $domain=$ENV{'user.domain'}; }
1593: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1594: my $now=time;
1595: my %hash;
1596: my $path=$perlvar{'lonDaemons'}.'/tmp';
1597: if (tie(%hash,'GDBM_File',
1598: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1599: &GDBM_WRCREAT(),0640)) {
1600: $hash{"version:$symb"}++;
1601: my $version=$hash{"version:$symb"};
1602: my $allkeys='';
1603: foreach my $key (keys(%$storehash)) {
1604: $allkeys.=$key.':';
1605: $hash{"$version:$symb:$key"}=$$storehash{$key};
1606: }
1607: $hash{"$version:$symb:timestamp"}=$now;
1608: $allkeys.='timestamp';
1609: $hash{"$version:keys:$symb"}=$allkeys;
1610: if (untie(%hash)) {
1611: return 'ok';
1612: } else {
1613: return "error:$!";
1614: }
1615: } else {
1616: return "error:$!";
1617: }
1618: }
1619:
1620: # -----------------------------------------------------------------Temp Restore
1621:
1622: sub tmprestore {
1623: my ($symb,$namespace,$domain,$stuname) = @_;
1624:
1625: if (!$symb) {
1626: $symb=&symbread();
1627: if (!$symb) { $symb= $ENV{'request.url'}; }
1628: }
1629: $symb=escape($symb);
1630:
1631: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1632: #FIXME needs to do something for /pub resources
1633: if (!$domain) { $domain=$ENV{'user.domain'}; }
1634: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1635:
1636: my %returnhash;
1637: $namespace=~s/\//\_/g;
1638: $namespace=~s/\W//g;
1639: my %hash;
1640: my $path=$perlvar{'lonDaemons'}.'/tmp';
1641: if (tie(%hash,'GDBM_File',
1642: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1643: &GDBM_READER(),0640)) {
1644: my $version=$hash{"version:$symb"};
1645: $returnhash{'version'}=$version;
1646: my $scope;
1647: for ($scope=1;$scope<=$version;$scope++) {
1648: my $vkeys=$hash{"$scope:keys:$symb"};
1649: my @keys=split(/:/,$vkeys);
1650: my $key;
1651: $returnhash{"$scope:keys"}=$vkeys;
1652: foreach $key (@keys) {
1653: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1654: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1655: }
1656: }
1657: if (!(untie(%hash))) {
1658: return "error:$!";
1659: }
1660: } else {
1661: return "error:$!";
1662: }
1663: return %returnhash;
1664: }
1665:
1666: # ----------------------------------------------------------------------- Store
1667:
1668: sub store {
1669: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1670: my $home='';
1671:
1672: if ($stuname) { $home=&homeserver($stuname,$domain); }
1673:
1674: $symb=&symbclean($symb);
1675: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1676:
1677: if (!$domain) { $domain=$ENV{'user.domain'}; }
1678: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1679:
1680: &devalidate($symb,$stuname,$domain);
1681:
1682: $symb=escape($symb);
1683: if (!$namespace) {
1684: unless ($namespace=$ENV{'request.course.id'}) {
1685: return '';
1686: }
1687: }
1688: if (!$home) { $home=$ENV{'user.home'}; }
1689: my $namevalue='';
1690: foreach (keys %$storehash) {
1691: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1692: }
1693: $namevalue=~s/\&$//;
1694: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1695: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1696: }
1697:
1698: # -------------------------------------------------------------- Critical Store
1699:
1700: sub cstore {
1701: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1702: my $home='';
1703:
1704: if ($stuname) { $home=&homeserver($stuname,$domain); }
1705:
1706: $symb=&symbclean($symb);
1707: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1708:
1709: if (!$domain) { $domain=$ENV{'user.domain'}; }
1710: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1711:
1712: &devalidate($symb,$stuname,$domain);
1713:
1714: $symb=escape($symb);
1715: if (!$namespace) {
1716: unless ($namespace=$ENV{'request.course.id'}) {
1717: return '';
1718: }
1719: }
1720: if (!$home) { $home=$ENV{'user.home'}; }
1721:
1722: my $namevalue='';
1723: foreach (keys %$storehash) {
1724: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1725: }
1726: $namevalue=~s/\&$//;
1727: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1728: return critical
1729: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1730: }
1731:
1732: # --------------------------------------------------------------------- Restore
1733:
1734: sub restore {
1735: my ($symb,$namespace,$domain,$stuname) = @_;
1736: my $home='';
1737:
1738: if ($stuname) { $home=&homeserver($stuname,$domain); }
1739:
1740: if (!$symb) {
1741: unless ($symb=escape(&symbread())) { return ''; }
1742: } else {
1743: $symb=&escape(&symbclean($symb));
1744: }
1745: if (!$namespace) {
1746: unless ($namespace=$ENV{'request.course.id'}) {
1747: return '';
1748: }
1749: }
1750: if (!$domain) { $domain=$ENV{'user.domain'}; }
1751: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1752: if (!$home) { $home=$ENV{'user.home'}; }
1753: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1754:
1755: my %returnhash=();
1756: foreach (split(/\&/,$answer)) {
1757: my ($name,$value)=split(/\=/,$_);
1758: $returnhash{&unescape($name)}=&unescape($value);
1759: }
1760: my $version;
1761: for ($version=1;$version<=$returnhash{'version'};$version++) {
1762: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1763: $returnhash{$_}=$returnhash{$version.':'.$_};
1764: }
1765: }
1766: return %returnhash;
1767: }
1768:
1769: # ---------------------------------------------------------- Course Description
1770:
1771: sub coursedescription {
1772: my $courseid=shift;
1773: $courseid=~s/^\///;
1774: $courseid=~s/\_/\//g;
1775: my ($cdomain,$cnum)=split(/\//,$courseid);
1776: my $chome=&homeserver($cnum,$cdomain);
1777: my $normalid=$cdomain.'_'.$cnum;
1778: # need to always cache even if we get errors otherwise we keep
1779: # trying and trying and trying to get the course description.
1780: my %envhash=();
1781: my %returnhash=();
1782: $envhash{'course.'.$normalid.'.last_cache'}=time;
1783: if ($chome ne 'no_host') {
1784: %returnhash=&dump('environment',$cdomain,$cnum);
1785: if (!exists($returnhash{'con_lost'})) {
1786: $returnhash{'home'}= $chome;
1787: $returnhash{'domain'} = $cdomain;
1788: $returnhash{'num'} = $cnum;
1789: while (my ($name,$value) = each %returnhash) {
1790: $envhash{'course.'.$normalid.'.'.$name}=$value;
1791: }
1792: $returnhash{'url'}=&clutter($returnhash{'url'});
1793: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1794: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1795: $envhash{'course.'.$normalid.'.home'}=$chome;
1796: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1797: $envhash{'course.'.$normalid.'.num'}=$cnum;
1798: }
1799: }
1800: &appenv(%envhash);
1801: return %returnhash;
1802: }
1803:
1804: # -------------------------------------------------------- Get user privileges
1805:
1806: sub rolesinit {
1807: my ($domain,$username,$authhost)=@_;
1808: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1809: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1810: my %allroles=();
1811: my %thesepriv=();
1812: my $now=time;
1813: my $userroles="user.login.time=$now\n";
1814: my $thesestr;
1815:
1816: if ($rolesdump ne '') {
1817: foreach (split(/&/,$rolesdump)) {
1818: if ($_!~/^rolesdef\&/) {
1819: my ($area,$role)=split(/=/,$_);
1820: $area=~s/\_\w\w$//;
1821: my ($trole,$tend,$tstart)=split(/_/,$role);
1822: $userroles.='user.role.'.$trole.'.'.$area.'='.
1823: $tstart.'.'.$tend."\n";
1824: # log the associated role with the area
1825: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
1826: if ($tend!=0) {
1827: if ($tend<$now) {
1828: $trole='';
1829: }
1830: }
1831: if ($tstart!=0) {
1832: if ($tstart>$now) {
1833: $trole='';
1834: }
1835: }
1836: if (($area ne '') && ($trole ne '')) {
1837: my $spec=$trole.'.'.$area;
1838: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1839: if ($trole =~ /^cr\//) {
1840: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1841: my $homsvr=homeserver($rauthor,$rdomain);
1842: if ($hostname{$homsvr} ne '') {
1843: my $roledef=
1844: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1845: $homsvr);
1846: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1847: my ($syspriv,$dompriv,$coursepriv)=
1848: split(/\_/,unescape($roledef));
1849: if (defined($syspriv)) {
1850: $allroles{'cm./'}.=':'.$syspriv;
1851: $allroles{$spec.'./'}.=':'.$syspriv;
1852: }
1853: if ($tdomain ne '') {
1854: if (defined($dompriv)) {
1855: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1856: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1857: }
1858: if ($trest ne '') {
1859: if (defined($coursepriv)) {
1860: $allroles{'cm.'.$area}.=':'.$coursepriv;
1861: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1862: }
1863: }
1864: }
1865: }
1866: }
1867: } else {
1868: if (defined($pr{$trole.':s'})) {
1869: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1870: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1871: }
1872: if ($tdomain ne '') {
1873: if (defined($pr{$trole.':d'})) {
1874: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1875: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1876: }
1877: if ($trest ne '') {
1878: if (defined($pr{$trole.':c'})) {
1879: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1880: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1881: }
1882: }
1883: }
1884: }
1885: }
1886: }
1887: }
1888: my $adv=0;
1889: my $author=0;
1890: foreach (keys %allroles) {
1891: %thesepriv=();
1892: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1893: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1894: foreach (split(/:/,$allroles{$_})) {
1895: if ($_ ne '') {
1896: my ($privilege,$restrictions)=split(/&/,$_);
1897: if ($restrictions eq '') {
1898: $thesepriv{$privilege}='F';
1899: } else {
1900: if ($thesepriv{$privilege} ne 'F') {
1901: $thesepriv{$privilege}.=$restrictions;
1902: }
1903: }
1904: }
1905: }
1906: $thesestr='';
1907: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1908: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1909: }
1910: $userroles.='user.adv='.$adv."\n".
1911: 'user.author='.$author."\n";
1912: $ENV{'user.adv'}=$adv;
1913: }
1914: return $userroles;
1915: }
1916:
1917: # --------------------------------------------------------------- get interface
1918:
1919: sub get {
1920: my ($namespace,$storearr,$udomain,$uname)=@_;
1921: my $items='';
1922: foreach (@$storearr) {
1923: $items.=escape($_).'&';
1924: }
1925: $items=~s/\&$//;
1926: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1927: if (!$uname) { $uname=$ENV{'user.name'}; }
1928: my $uhome=&homeserver($uname,$udomain);
1929:
1930: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1931: my @pairs=split(/\&/,$rep);
1932: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
1933: return @pairs;
1934: }
1935: my %returnhash=();
1936: my $i=0;
1937: foreach (@$storearr) {
1938: $returnhash{$_}=unescape($pairs[$i]);
1939: $i++;
1940: }
1941: return %returnhash;
1942: }
1943:
1944: # --------------------------------------------------------------- del interface
1945:
1946: sub del {
1947: my ($namespace,$storearr,$udomain,$uname)=@_;
1948: my $items='';
1949: foreach (@$storearr) {
1950: $items.=escape($_).'&';
1951: }
1952: $items=~s/\&$//;
1953: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1954: if (!$uname) { $uname=$ENV{'user.name'}; }
1955: my $uhome=&homeserver($uname,$udomain);
1956:
1957: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1958: }
1959:
1960: # -------------------------------------------------------------- dump interface
1961:
1962: sub dump {
1963: my ($namespace,$udomain,$uname,$regexp)=@_;
1964: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1965: if (!$uname) { $uname=$ENV{'user.name'}; }
1966: my $uhome=&homeserver($uname,$udomain);
1967: if ($regexp) {
1968: $regexp=&escape($regexp);
1969: } else {
1970: $regexp='.';
1971: }
1972: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1973: my @pairs=split(/\&/,$rep);
1974: my %returnhash=();
1975: foreach (@pairs) {
1976: my ($key,$value)=split(/=/,$_);
1977: $returnhash{unescape($key)}=unescape($value);
1978: }
1979: return %returnhash;
1980: }
1981:
1982: # --------------------------------------------------------------- currentdump
1983: sub currentdump {
1984: my ($courseid,$sdom,$sname)=@_;
1985: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1986: $sdom = $ENV{'user.domain'} if (! defined($sdom));
1987: $sname = $ENV{'user.name'} if (! defined($sname));
1988: my $uhome = &homeserver($sname,$sdom);
1989: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
1990: return if ($rep =~ /^(error:|no_such_host)/);
1991: #
1992: my %returnhash=();
1993: #
1994: if ($rep eq "unknown_cmd") {
1995: # an old lond will not know currentdump
1996: # Do a dump and make it look like a currentdump
1997: my @tmp = &dump($courseid,$sdom,$sname,'.');
1998: return if ($tmp[0] =~ /^(error:|no_such_host)/);
1999: my %hash = @tmp;
2000: @tmp=();
2001: # Code ripped from lond, essentially. The only difference
2002: # here is the unescaping done by lonnet::dump(). Conceivably
2003: # we might run in to problems with parameter names =~ /^v\./
2004: while (my ($key,$value) = each(%hash)) {
2005: my ($v,$symb,$param) = split(/:/,$key);
2006: next if ($v eq 'version' || $symb eq 'keys');
2007: next if (exists($returnhash{$symb}) &&
2008: exists($returnhash{$symb}->{$param}) &&
2009: $returnhash{$symb}->{'v.'.$param} > $v);
2010: $returnhash{$symb}->{$param}=$value;
2011: $returnhash{$symb}->{'v.'.$param}=$v;
2012: }
2013: #
2014: # Remove all of the keys in the hashes which keep track of
2015: # the version of the parameter.
2016: while (my ($symb,$param_hash) = each(%returnhash)) {
2017: # use a foreach because we are going to delete from the hash.
2018: foreach my $key (keys(%$param_hash)) {
2019: delete($param_hash->{$key}) if ($key =~ /^v\./);
2020: }
2021: }
2022: } else {
2023: my @pairs=split(/\&/,$rep);
2024: foreach (@pairs) {
2025: my ($key,$value)=split(/=/,$_);
2026: my ($symb,$param) = split(/:/,$key);
2027: $returnhash{&unescape($symb)}->{&unescape($param)} =
2028: &unescape($value);
2029: }
2030: }
2031: return %returnhash;
2032: }
2033:
2034: # --------------------------------------------------------------- put interface
2035:
2036: sub put {
2037: my ($namespace,$storehash,$udomain,$uname)=@_;
2038: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2039: if (!$uname) { $uname=$ENV{'user.name'}; }
2040: my $uhome=&homeserver($uname,$udomain);
2041: my $items='';
2042: foreach (keys %$storehash) {
2043: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
2044: }
2045: $items=~s/\&$//;
2046: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2047: }
2048:
2049: # ------------------------------------------------------ critical put interface
2050:
2051: sub cput {
2052: my ($namespace,$storehash,$udomain,$uname)=@_;
2053: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2054: if (!$uname) { $uname=$ENV{'user.name'}; }
2055: my $uhome=&homeserver($uname,$udomain);
2056: my $items='';
2057: foreach (keys %$storehash) {
2058: $items.=escape($_).'='.escape($$storehash{$_}).'&';
2059: }
2060: $items=~s/\&$//;
2061: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2062: }
2063:
2064: # -------------------------------------------------------------- eget interface
2065:
2066: sub eget {
2067: my ($namespace,$storearr,$udomain,$uname)=@_;
2068: my $items='';
2069: foreach (@$storearr) {
2070: $items.=escape($_).'&';
2071: }
2072: $items=~s/\&$//;
2073: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2074: if (!$uname) { $uname=$ENV{'user.name'}; }
2075: my $uhome=&homeserver($uname,$udomain);
2076: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2077: my @pairs=split(/\&/,$rep);
2078: my %returnhash=();
2079: my $i=0;
2080: foreach (@$storearr) {
2081: $returnhash{$_}=unescape($pairs[$i]);
2082: $i++;
2083: }
2084: return %returnhash;
2085: }
2086:
2087: # ---------------------------------------------- Custom access rule evaluation
2088:
2089: sub customaccess {
2090: my ($priv,$uri)=@_;
2091: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2092: $urealm=~s/^\W//;
2093: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2094: my $access=0;
2095: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2096: my ($effect,$realm,$role)=split(/\:/,$_);
2097: if ($role) {
2098: if ($role ne $urole) { next; }
2099: }
2100: foreach (split(/\s*\,\s*/,$realm)) {
2101: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2102: if ($tdom) {
2103: if ($tdom ne $udom) { next; }
2104: }
2105: if ($tcrs) {
2106: if ($tcrs ne $ucrs) { next; }
2107: }
2108: if ($tsec) {
2109: if ($tsec ne $usec) { next; }
2110: }
2111: $access=($effect eq 'allow');
2112: last;
2113: }
2114: }
2115: return $access;
2116: }
2117:
2118: # ------------------------------------------------- Check for a user privilege
2119:
2120: sub allowed {
2121: my ($priv,$uri)=@_;
2122:
2123: my $orguri=$uri;
2124: $uri=&declutter($uri);
2125:
2126: # Free bre access to adm and meta resources
2127:
2128: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2129: return 'F';
2130: }
2131:
2132: # Free bre to public access
2133:
2134: if ($priv eq 'bre') {
2135: my $copyright=&metadata($uri,'copyright');
2136: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2137: return 'F';
2138: }
2139: if ($copyright eq 'priv') {
2140: $uri=~/([^\/]+)\/([^\/]+)\//;
2141: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2142: return '';
2143: }
2144: }
2145: if ($copyright eq 'domain') {
2146: $uri=~/([^\/]+)\/([^\/]+)\//;
2147: unless (($ENV{'user.domain'} eq $1) ||
2148: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2149: return '';
2150: }
2151: }
2152: if ($ENV{'request.role'}=~ /li\.\//) {
2153: # Library role, so allow browsing of resources in this domain.
2154: return 'F';
2155: }
2156: if ($copyright eq 'custom') {
2157: unless (&customaccess($priv,$uri)) { return ''; }
2158: }
2159: }
2160: # Domain coordinator is trying to create a course
2161: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2162: # uri is the requested domain in this case.
2163: # comparison to 'request.role.domain' shows if the user has selected
2164: # a role of dc for the domain in question.
2165: return 'F' if ($uri eq $ENV{'request.role.domain'});
2166: }
2167:
2168: my $thisallowed='';
2169: my $statecond=0;
2170: my $courseprivid='';
2171:
2172: # Course
2173:
2174: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
2175: $thisallowed.=$1;
2176: }
2177:
2178: # Domain
2179:
2180: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2181: =~/$priv\&([^\:]*)/) {
2182: $thisallowed.=$1;
2183: }
2184:
2185: # Course: uri itself is a course
2186: my $courseuri=$uri;
2187: $courseuri=~s/\_(\d)/\/$1/;
2188: $courseuri=~s/^([^\/])/\/$1/;
2189:
2190: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2191: =~/$priv\&([^\:]*)/) {
2192: $thisallowed.=$1;
2193: }
2194:
2195: # URI is an uploaded document for this course
2196:
2197: if (($priv eq 'bre') &&
2198: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2199: return 'F';
2200: }
2201: # Full access at system, domain or course-wide level? Exit.
2202:
2203: if ($thisallowed=~/F/) {
2204: return 'F';
2205: }
2206:
2207: # If this is generating or modifying users, exit with special codes
2208:
2209: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
2210: return $thisallowed;
2211: }
2212: #
2213: # Gathered so far: system, domain and course wide privileges
2214: #
2215: # Course: See if uri or referer is an individual resource that is part of
2216: # the course
2217:
2218: if ($ENV{'request.course.id'}) {
2219:
2220: $courseprivid=$ENV{'request.course.id'};
2221: if ($ENV{'request.course.sec'}) {
2222: $courseprivid.='/'.$ENV{'request.course.sec'};
2223: }
2224: $courseprivid=~s/\_/\//;
2225: my $checkreferer=1;
2226: my ($match,$cond)=&is_on_map($uri);
2227: if ($match) {
2228: $statecond=$cond;
2229: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2230: =~/$priv\&([^\:]*)/) {
2231: $thisallowed.=$1;
2232: $checkreferer=0;
2233: }
2234: }
2235:
2236: if ($checkreferer) {
2237: my $refuri=$ENV{'httpref.'.$orguri};
2238: unless ($refuri) {
2239: foreach (keys %ENV) {
2240: if ($_=~/^httpref\..*\*/) {
2241: my $pattern=$_;
2242: $pattern=~s/^httpref\.\/res\///;
2243: $pattern=~s/\*/\[\^\/\]\+/g;
2244: $pattern=~s/\//\\\//g;
2245: if ($orguri=~/$pattern/) {
2246: $refuri=$ENV{$_};
2247: }
2248: }
2249: }
2250: }
2251:
2252: if ($refuri) {
2253: $refuri=&declutter($refuri);
2254: my ($match,$cond)=&is_on_map($refuri);
2255: if ($match) {
2256: my $refstatecond=$cond;
2257: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2258: =~/$priv\&([^\:]*)/) {
2259: $thisallowed.=$1;
2260: $uri=$refuri;
2261: $statecond=$refstatecond;
2262: }
2263: }
2264: }
2265: }
2266: }
2267:
2268: #
2269: # Gathered now: all privileges that could apply, and condition number
2270: #
2271: #
2272: # Full or no access?
2273: #
2274:
2275: if ($thisallowed=~/F/) {
2276: return 'F';
2277: }
2278:
2279: unless ($thisallowed) {
2280: return '';
2281: }
2282:
2283: # Restrictions exist, deal with them
2284: #
2285: # C:according to course preferences
2286: # R:according to resource settings
2287: # L:unless locked
2288: # X:according to user session state
2289: #
2290:
2291: # Possibly locked functionality, check all courses
2292: # Locks might take effect only after 10 minutes cache expiration for other
2293: # courses, and 2 minutes for current course
2294:
2295: my $envkey;
2296: if ($thisallowed=~/L/) {
2297: foreach $envkey (keys %ENV) {
2298: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2299: my $courseid=$2;
2300: my $roleid=$1.'.'.$2;
2301: $courseid=~s/^\///;
2302: my $expiretime=600;
2303: if ($ENV{'request.role'} eq $roleid) {
2304: $expiretime=120;
2305: }
2306: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2307: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2308: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2309: &coursedescription($courseid);
2310: }
2311: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2312: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2313: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2314: &log($ENV{'user.domain'},$ENV{'user.name'},
2315: $ENV{'user.home'},
2316: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2317: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2318: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2319: return '';
2320: }
2321: }
2322: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2323: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2324: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2325: &log($ENV{'user.domain'},$ENV{'user.name'},
2326: $ENV{'user.home'},
2327: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2328: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2329: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2330: return '';
2331: }
2332: }
2333: }
2334: }
2335: }
2336:
2337: #
2338: # Rest of the restrictions depend on selected course
2339: #
2340:
2341: unless ($ENV{'request.course.id'}) {
2342: return '1';
2343: }
2344:
2345: #
2346: # Now user is definitely in a course
2347: #
2348:
2349:
2350: # Course preferences
2351:
2352: if ($thisallowed=~/C/) {
2353: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2354: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2355: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2356: =~/$rolecode/) {
2357: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2358: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2359: $ENV{'request.course.id'});
2360: return '';
2361: }
2362:
2363: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2364: =~/$unamedom/) {
2365: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2366: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2367: $ENV{'request.course.id'});
2368: return '';
2369: }
2370: }
2371:
2372: # Resource preferences
2373:
2374: if ($thisallowed=~/R/) {
2375: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2376: if (&metadata($uri,'roledeny')=~/$rolecode/) {
2377: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2378: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2379: return '';
2380: }
2381: }
2382:
2383: # Restricted by state or randomout?
2384:
2385: if ($thisallowed=~/X/) {
2386: if ($ENV{'acc.randomout'}) {
2387: my $symb=&symbread($uri,1);
2388: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2389: return '';
2390: }
2391: }
2392: if (&condval($statecond)) {
2393: return '2';
2394: } else {
2395: return '';
2396: }
2397: }
2398:
2399: return 'F';
2400: }
2401:
2402: # --------------------------------------------------- Is a resource on the map?
2403:
2404: sub is_on_map {
2405: my $uri=&declutter(shift);
2406: my @uriparts=split(/\//,$uri);
2407: my $filename=$uriparts[$#uriparts];
2408: my $pathname=$uri;
2409: $pathname=~s|/\Q$filename\E$||;
2410: $pathname=~s/^adm\/wrapper\///;
2411: #Trying to find the conditional for the file
2412: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2413: /\&\Q$filename\E\:([\d\|]+)\&/);
2414: if ($match) {
2415: return (1,$1);
2416: } else {
2417: return (0,0);
2418: }
2419: }
2420:
2421: # ----------------------------------------------------------------- Define Role
2422:
2423: sub definerole {
2424: if (allowed('mcr','/')) {
2425: my ($rolename,$sysrole,$domrole,$courole)=@_;
2426: foreach (split('/',$sysrole)) {
2427: my ($crole,$cqual)=split(/\&/,$_);
2428: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2429: if ($pr{'cr:s'}=~/$crole\&/) {
2430: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2431: return "refused:s:$crole&$cqual";
2432: }
2433: }
2434: }
2435: foreach (split('/',$domrole)) {
2436: my ($crole,$cqual)=split(/\&/,$_);
2437: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2438: if ($pr{'cr:d'}=~/$crole\&/) {
2439: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2440: return "refused:d:$crole&$cqual";
2441: }
2442: }
2443: }
2444: foreach (split('/',$courole)) {
2445: my ($crole,$cqual)=split(/\&/,$_);
2446: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2447: if ($pr{'cr:c'}=~/$crole\&/) {
2448: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2449: return "refused:c:$crole&$cqual";
2450: }
2451: }
2452: }
2453: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2454: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2455: "rolesdef_$rolename=".
2456: escape($sysrole.'_'.$domrole.'_'.$courole);
2457: return reply($command,$ENV{'user.home'});
2458: } else {
2459: return 'refused';
2460: }
2461: }
2462:
2463: # ---------------- Make a metadata query against the network of library servers
2464:
2465: sub metadata_query {
2466: my ($query,$custom,$customshow,$server_array)=@_;
2467: my %rhash;
2468: my @server_list = (defined($server_array) ? @$server_array
2469: : keys(%libserv) );
2470: for my $server (@server_list) {
2471: unless ($custom or $customshow) {
2472: my $reply=&reply("querysend:".&escape($query),$server);
2473: $rhash{$server}=$reply;
2474: }
2475: else {
2476: my $reply=&reply("querysend:".&escape($query).':'.
2477: &escape($custom).':'.&escape($customshow),
2478: $server);
2479: $rhash{$server}=$reply;
2480: }
2481: }
2482: return \%rhash;
2483: }
2484:
2485: # ----------------------------------------- Send log queries and wait for reply
2486:
2487: sub log_query {
2488: my ($uname,$udom,$query,%filters)=@_;
2489: my $uhome=&homeserver($uname,$udom);
2490: if ($uhome eq 'no_host') { return 'error: no_host'; }
2491: my $uhost=$hostname{$uhome};
2492: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2493: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2494: $uhome);
2495: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2496: return get_query_reply($queryid);
2497: }
2498:
2499: sub get_query_reply {
2500: my $queryid=shift;
2501: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2502: my $reply='';
2503: for (1..100) {
2504: sleep 2;
2505: if (-e $replyfile.'.end') {
2506: if (my $fh=Apache::File->new($replyfile)) {
2507: $reply.=<$fh>;
2508: $fh->close;
2509: } else { return 'error: reply_file_error'; }
2510: return &unescape($reply);
2511: }
2512: }
2513: return 'timeout:'.$queryid;
2514: }
2515:
2516: sub courselog_query {
2517: #
2518: # possible filters:
2519: # url: url or symb
2520: # username
2521: # domain
2522: # action: view, submit, grade
2523: # start: timestamp
2524: # end: timestamp
2525: #
2526: my (%filters)=@_;
2527: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2528: if ($filters{'url'}) {
2529: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2530: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2531: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2532: }
2533: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2534: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2535: return &log_query($cname,$cdom,'courselog',%filters);
2536: }
2537:
2538: sub userlog_query {
2539: my ($uname,$udom,%filters)=@_;
2540: return &log_query($uname,$udom,'userlog',%filters);
2541: }
2542:
2543: # ------------------------------------------------------------------ Plain Text
2544:
2545: sub plaintext {
2546: my $short=shift;
2547: return $prp{$short};
2548: }
2549:
2550: # ----------------------------------------------------------------- Assign Role
2551:
2552: sub assignrole {
2553: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
2554: my $mrole;
2555: if ($role =~ /^cr\//) {
2556: unless (&allowed('ccr',$url)) {
2557: &logthis('Refused custom assignrole: '.
2558: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2559: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2560: return 'refused';
2561: }
2562: $mrole='cr';
2563: } else {
2564: my $cwosec=$url;
2565: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2566: unless (&allowed('c'.$role,$cwosec)) {
2567: &logthis('Refused assignrole: '.
2568: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2569: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2570: return 'refused';
2571: }
2572: $mrole=$role;
2573: }
2574: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2575: "$udom:$uname:$url".'_'."$mrole=$role";
2576: if ($end) { $command.='_'.$end; }
2577: if ($start) {
2578: if ($end) {
2579: $command.='_'.$start;
2580: } else {
2581: $command.='_0_'.$start;
2582: }
2583: }
2584: # actually delete
2585: if ($deleteflag) {
2586: if (&allowed('dro',$udom)) {
2587: # modify command to delete the role
2588: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
2589: "$udom:$uname:$url".'_'."$mrole";
2590: # set start and finish to negative values for userrolelog
2591: $start=-1;
2592: $end=-1;
2593: }
2594: }
2595: # send command
2596: my $answer=&reply($command,&homeserver($uname,$udom));
2597: # log new user role if status is ok
2598: if ($answer eq 'ok') {
2599: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
2600: }
2601: return $answer;
2602: }
2603:
2604: # -------------------------------------------------- Modify user authentication
2605: # Overrides without validation
2606:
2607: sub modifyuserauth {
2608: my ($udom,$uname,$umode,$upass)=@_;
2609: my $uhome=&homeserver($uname,$udom);
2610: unless (&allowed('mau',$udom)) { return 'refused'; }
2611: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2612: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2613: ' in domain '.$ENV{'request.role.domain'});
2614: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2615: &escape($upass),$uhome);
2616: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2617: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2618: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2619: &log($udom,,$uname,$uhome,
2620: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2621: $ENV{'user.name'}.', '.$umode.
2622: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2623: unless ($reply eq 'ok') {
2624: &logthis('Authentication mode error: '.$reply);
2625: return 'error: '.$reply;
2626: }
2627: return 'ok';
2628: }
2629:
2630: # --------------------------------------------------------------- Modify a user
2631:
2632: sub modifyuser {
2633: my ($udom, $uname, $uid,
2634: $umode, $upass, $first,
2635: $middle, $last, $gene,
2636: $forceid, $desiredhome)=@_;
2637: $udom=~s/\W//g;
2638: $uname=~s/\W//g;
2639: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2640: $umode.', '.$first.', '.$middle.', '.
2641: $last.', '.$gene.'(forceid: '.$forceid.')'.
2642: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2643: ' desiredhome not specified').
2644: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2645: ' in domain '.$ENV{'request.role.domain'});
2646: my $uhome=&homeserver($uname,$udom,'true');
2647: # ----------------------------------------------------------------- Create User
2648: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
2649: my $unhome='';
2650: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2651: $unhome = $desiredhome;
2652: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2653: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2654: } else { # load balancing routine for determining $unhome
2655: my $tryserver;
2656: my $loadm=10000000;
2657: foreach $tryserver (keys %libserv) {
2658: if ($hostdom{$tryserver} eq $udom) {
2659: my $answer=reply('load',$tryserver);
2660: if (($answer=~/\d+/) && ($answer<$loadm)) {
2661: $loadm=$answer;
2662: $unhome=$tryserver;
2663: }
2664: }
2665: }
2666: }
2667: if (($unhome eq '') || ($unhome eq 'no_host')) {
2668: return 'error: unable to find a home server for '.$uname.
2669: ' in domain '.$udom;
2670: }
2671: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2672: &escape($upass),$unhome);
2673: unless ($reply eq 'ok') {
2674: return 'error: '.$reply;
2675: }
2676: $uhome=&homeserver($uname,$udom,'true');
2677: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2678: return 'error: verify home';
2679: }
2680: } # End of creation of new user
2681: # ---------------------------------------------------------------------- Add ID
2682: if ($uid) {
2683: $uid=~tr/A-Z/a-z/;
2684: my %uidhash=&idrget($udom,$uname);
2685: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2686: && (!$forceid)) {
2687: unless ($uid eq $uidhash{$uname}) {
2688: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2689: }
2690: } else {
2691: &idput($udom,($uname => $uid));
2692: }
2693: }
2694: # -------------------------------------------------------------- Add names, etc
2695: my @tmp=&get('environment',
2696: ['firstname','middlename','lastname','generation'],
2697: $udom,$uname);
2698: my %names;
2699: if ($tmp[0] =~ m/^error:.*/) {
2700: %names=();
2701: } else {
2702: %names = @tmp;
2703: }
2704: if ($first) { $names{'firstname'} = $first; }
2705: if ($middle) { $names{'middlename'} = $middle; }
2706: if ($last) { $names{'lastname'} = $last; }
2707: if ($gene) { $names{'generation'} = $gene; }
2708: my $reply = &put('environment', \%names, $udom,$uname);
2709: if ($reply ne 'ok') { return 'error: '.$reply; }
2710: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2711: $umode.', '.$first.', '.$middle.', '.
2712: $last.', '.$gene.' by '.
2713: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2714: return 'ok';
2715: }
2716:
2717: # -------------------------------------------------------------- Modify student
2718:
2719: sub modifystudent {
2720: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2721: $end,$start,$forceid,$desiredhome)=@_;
2722: my $cid='';
2723: unless ($cid=$ENV{'request.course.id'}) {
2724: return 'not_in_class';
2725: }
2726: # --------------------------------------------------------------- Make the user
2727: my $reply=&modifyuser
2728: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2729: $desiredhome);
2730: unless ($reply eq 'ok') { return $reply; }
2731: # This will cause &modify_student_enrollment to get the uid from the
2732: # students environment
2733: $uid = undef if (!$forceid);
2734: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
2735: $last,$gene,$usec,$end,$start);
2736: return $reply;
2737: }
2738:
2739: sub modify_student_enrollment {
2740: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
2741: # Get the course id from the environment
2742: my $cid='';
2743: unless ($cid=$ENV{'request.course.id'}) {
2744: return 'not_in_class';
2745: }
2746: # Make sure the user exists
2747: my $uhome=&homeserver($uname,$udom);
2748: if (($uhome eq '') || ($uhome eq 'no_host')) {
2749: return 'error: no such user';
2750: }
2751: #
2752: # Get student data if we were not given enough information
2753: if (!defined($first) || $first eq '' ||
2754: !defined($last) || $last eq '' ||
2755: !defined($uid) || $uid eq '' ||
2756: !defined($middle) || $middle eq '' ||
2757: !defined($gene) || $gene eq '') {
2758: # They did not supply us with enough data to enroll the student, so
2759: # we need to pick up more information.
2760: my %tmp = &get('environment',
2761: ['firstname','middlename','lastname', 'generation','id']
2762: ,$udom,$uname);
2763:
2764: foreach (keys(%tmp)) {
2765: &logthis("key $_ = ".$tmp{$_});
2766: }
2767: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
2768: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
2769: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
2770: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
2771: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
2772: }
2773: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
2774: $first,$middle);
2775: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2776: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2777: &escape($uname.':'.$udom).'='.
2778: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
2779: $ENV{'course.'.$cid.'.home'});
2780: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2781: return 'error: '.$reply;
2782: }
2783: # Add student role to user
2784: my $uurl='/'.$cid;
2785: $uurl=~s/\_/\//g;
2786: if ($usec) {
2787: $uurl.='/'.$usec;
2788: }
2789: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2790: }
2791:
2792: # ------------------------------------------------- Write to course preferences
2793:
2794: sub writecoursepref {
2795: my ($courseid,%prefs)=@_;
2796: $courseid=~s/^\///;
2797: $courseid=~s/\_/\//g;
2798: my ($cdomain,$cnum)=split(/\//,$courseid);
2799: my $chome=homeserver($cnum,$cdomain);
2800: if (($chome eq '') || ($chome eq 'no_host')) {
2801: return 'error: no such course';
2802: }
2803: my $cstring='';
2804: foreach (keys %prefs) {
2805: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2806: }
2807: $cstring=~s/\&$//;
2808: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2809: }
2810:
2811: # ---------------------------------------------------------- Make/modify course
2812:
2813: sub createcourse {
2814: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
2815: $url=&declutter($url);
2816: my $cid='';
2817: unless (&allowed('ccc',$udom)) {
2818: return 'refused';
2819: }
2820: # ------------------------------------------------------------------- Create ID
2821: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2822: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2823: # ----------------------------------------------- Make sure that does not exist
2824: my $uhome=&homeserver($uname,$udom,'true');
2825: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2826: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2827: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2828: $uhome=&homeserver($uname,$udom,'true');
2829: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2830: return 'error: unable to generate unique course-ID';
2831: }
2832: }
2833: # ------------------------------------------------ Check supplied server name
2834: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
2835: if (! exists($libserv{$course_server})) {
2836: return 'error:bad server name '.$course_server;
2837: }
2838: # ------------------------------------------------------------- Make the course
2839: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2840: $course_server);
2841: unless ($reply eq 'ok') { return 'error: '.$reply; }
2842: $uhome=&homeserver($uname,$udom,'true');
2843: if (($uhome eq '') || ($uhome eq 'no_host')) {
2844: return 'error: no such course';
2845: }
2846: # ----------------------------------------------------------------- Course made
2847: # log existance
2848: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description),
2849: $uhome);
2850: &flushcourselogs();
2851: # set toplevel url
2852: my $topurl=$url;
2853: unless ($nonstandard) {
2854: # ------------------------------------------ For standard courses, make top url
2855: my $mapurl=&clutter($url);
2856: if ($mapurl eq '/res/') { $mapurl=''; }
2857: $ENV{'form.initmap'}=(<<ENDINITMAP);
2858: <map>
2859: <resource id="1" type="start"></resource>
2860: <resource id="2" src="$mapurl"></resource>
2861: <resource id="3" type="finish"></resource>
2862: <link index="1" from="1" to="2"></link>
2863: <link index="2" from="2" to="3"></link>
2864: </map>
2865: ENDINITMAP
2866: $topurl=&declutter(
2867: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
2868: );
2869: }
2870: # ----------------------------------------------------------- Write preferences
2871: &writecoursepref($udom.'_'.$uname,
2872: ('description' => $description,
2873: 'url' => $topurl));
2874: return '/'.$udom.'/'.$uname;
2875: }
2876:
2877: # ---------------------------------------------------------- Assign Custom Role
2878:
2879: sub assigncustomrole {
2880: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
2881: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2882: $end,$start,$deleteflag);
2883: }
2884:
2885: # ----------------------------------------------------------------- Revoke Role
2886:
2887: sub revokerole {
2888: my ($udom,$uname,$url,$role,$deleteflag)=@_;
2889: my $now=time;
2890: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
2891: }
2892:
2893: # ---------------------------------------------------------- Revoke Custom Role
2894:
2895: sub revokecustomrole {
2896: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
2897: my $now=time;
2898: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
2899: $deleteflag);
2900: }
2901:
2902: # ------------------------------------------------------------ Directory lister
2903:
2904: sub dirlist {
2905: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2906:
2907: $uri=~s/^\///;
2908: $uri=~s/\/$//;
2909: my ($udom, $uname);
2910: (undef,$udom,$uname)=split(/\//,$uri);
2911: if(defined($userdomain)) {
2912: $udom = $userdomain;
2913: }
2914: if(defined($username)) {
2915: $uname = $username;
2916: }
2917:
2918: my $dirRoot = $perlvar{'lonDocRoot'};
2919: if(defined($alternateDirectoryRoot)) {
2920: $dirRoot = $alternateDirectoryRoot;
2921: $dirRoot =~ s/\/$//;
2922: }
2923:
2924: if($udom) {
2925: if($uname) {
2926: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2927: homeserver($uname,$udom));
2928: return split(/:/,$listing);
2929: } elsif(!defined($alternateDirectoryRoot)) {
2930: my $tryserver;
2931: my %allusers=();
2932: foreach $tryserver (keys %libserv) {
2933: if($hostdom{$tryserver} eq $udom) {
2934: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2935: $udom, $tryserver);
2936: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2937: && ($listing ne 'con_lost')) {
2938: foreach (split(/:/,$listing)) {
2939: my ($entry,@stat)=split(/&/,$_);
2940: $allusers{$entry}=1;
2941: }
2942: }
2943: }
2944: }
2945: my $alluserstr='';
2946: foreach (sort keys %allusers) {
2947: $alluserstr.=$_.'&user:';
2948: }
2949: $alluserstr=~s/:$//;
2950: return split(/:/,$alluserstr);
2951: } else {
2952: my @emptyResults = ();
2953: push(@emptyResults, 'missing user name');
2954: return split(':',@emptyResults);
2955: }
2956: } elsif(!defined($alternateDirectoryRoot)) {
2957: my $tryserver;
2958: my %alldom=();
2959: foreach $tryserver (keys %libserv) {
2960: $alldom{$hostdom{$tryserver}}=1;
2961: }
2962: my $alldomstr='';
2963: foreach (sort keys %alldom) {
2964: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2965: }
2966: $alldomstr=~s/:$//;
2967: return split(/:/,$alldomstr);
2968: } else {
2969: my @emptyResults = ();
2970: push(@emptyResults, 'missing domain');
2971: return split(':',@emptyResults);
2972: }
2973: }
2974:
2975: # --------------------------------------------- GetFileTimestamp
2976: # This function utilizes dirlist and returns the date stamp for
2977: # when it was last modified. It will also return an error of -1
2978: # if an error occurs
2979:
2980: sub GetFileTimestamp {
2981: my ($studentDomain,$studentName,$filename,$root)=@_;
2982: $studentDomain=~s/\W//g;
2983: $studentName=~s/\W//g;
2984: my $subdir=$studentName.'__';
2985: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
2986: my $proname="$studentDomain/$subdir/$studentName";
2987: $proname .= '/'.$filename;
2988: my @dir = &Apache::lonnet::dirlist($proname, $studentDomain, $studentName,
2989: $root);
2990: my $fileStat = $dir[0];
2991: my @stats = split('&', $fileStat);
2992: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
2993: return $stats[9];
2994: } else {
2995: return -1;
2996: }
2997: }
2998:
2999: # -------------------------------------------------------- Value of a Condition
3000:
3001: sub directcondval {
3002: my $number=shift;
3003: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
3004: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
3005: } else {
3006: return 2;
3007: }
3008: }
3009:
3010: sub condval {
3011: my $condidx=shift;
3012: my $result=0;
3013: my $allpathcond='';
3014: foreach (split(/\|/,$condidx)) {
3015: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
3016: $allpathcond.=
3017: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
3018: }
3019: }
3020: $allpathcond=~s/\|$//;
3021: if ($ENV{'request.course.id'}) {
3022: if ($allpathcond) {
3023: my $operand='|';
3024: my @stack;
3025: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
3026: if ($_ eq '(') {
3027: push @stack,($operand,$result)
3028: } elsif ($_ eq ')') {
3029: my $before=pop @stack;
3030: if (pop @stack eq '&') {
3031: $result=$result>$before?$before:$result;
3032: } else {
3033: $result=$result>$before?$result:$before;
3034: }
3035: } elsif (($_ eq '&') || ($_ eq '|')) {
3036: $operand=$_;
3037: } else {
3038: my $new=directcondval($_);
3039: if ($operand eq '&') {
3040: $result=$result>$new?$new:$result;
3041: } else {
3042: $result=$result>$new?$result:$new;
3043: }
3044: }
3045: }
3046: }
3047: }
3048: return $result;
3049: }
3050:
3051: # ---------------------------------------------------- Devalidate courseresdata
3052:
3053: sub devalidatecourseresdata {
3054: my ($coursenum,$coursedomain)=@_;
3055: my $hashid=$coursenum.':'.$coursedomain;
3056: delete $courseresdatacache{$hashid.'.time'};
3057: }
3058:
3059: # --------------------------------------------------- Course Resourcedata Query
3060:
3061: sub courseresdata {
3062: my ($coursenum,$coursedomain,@which)=@_;
3063: my $coursehom=&homeserver($coursenum,$coursedomain);
3064: my $hashid=$coursenum.':'.$coursedomain;
3065: my $dodump=0;
3066: if (!defined($courseresdatacache{$hashid.'.time'})) {
3067: $dodump=1;
3068: } else {
3069: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
3070: }
3071: if ($dodump) {
3072: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
3073: my ($tmp) = keys(%dumpreply);
3074: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
3075: $courseresdatacache{$hashid.'.time'}=time;
3076: $courseresdatacache{$hashid}=\%dumpreply;
3077: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3078: return $tmp;
3079: }
3080: }
3081: foreach my $item (@which) {
3082: if (defined($courseresdatacache{$hashid}->{$item})) {
3083: return $courseresdatacache{$hashid}->{$item};
3084: }
3085: }
3086: return undef;
3087: }
3088:
3089: # --------------------------------------------------------- Value of a Variable
3090:
3091: sub EXT {
3092: my ($varname,$symbparm,$udom,$uname,)=@_;
3093:
3094: unless ($varname) { return ''; }
3095: #get real user name/domain, courseid and symb
3096: my $courseid;
3097: my $publicuser;
3098: if (!($uname && $udom)) {
3099: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
3100: if ($udom eq 'public' and $uname =~ /^public/) { $publicuser='1'; }
3101: if (!$symbparm) { $symbparm=$cursymb; }
3102: } else {
3103: $courseid=$ENV{'request.course.id'};
3104: }
3105: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
3106: my $rest;
3107: if (defined($therest[0])) {
3108: $rest=join('.',@therest);
3109: } else {
3110: $rest='';
3111: }
3112:
3113: my $qualifierrest=$qualifier;
3114: if ($rest) { $qualifierrest.='.'.$rest; }
3115: my $spacequalifierrest=$space;
3116: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
3117: if ($realm eq 'user') {
3118: # --------------------------------------------------------------- user.resource
3119: if ($space eq 'resource') {
3120: if (defined($Apache::lonhomework::parsing_a_problem)) {
3121: return $Apache::lonhomework::history{$qualifierrest};
3122: } else {
3123: my %restored;
3124: if ($publicuser || $ENV{'request.state'} eq 'construct') {
3125: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
3126: } else {
3127: %restored=&restore($symbparm,$courseid,$udom,$uname);
3128: }
3129: return $restored{$qualifierrest};
3130: }
3131: # ----------------------------------------------------------------- user.access
3132: } elsif ($space eq 'access') {
3133: # FIXME - not supporting calls for a specific user
3134: return &allowed($qualifier,$rest);
3135: # ------------------------------------------ user.preferences, user.environment
3136: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
3137: if (($uname eq $ENV{'user.name'}) &&
3138: ($udom eq $ENV{'user.domain'})) {
3139: return $ENV{join('.',('environment',$qualifierrest))};
3140: } else {
3141: my %returnhash;
3142: if (!$publicuser) {
3143: %returnhash=&userenvironment($udom,$uname,
3144: $qualifierrest);
3145: }
3146: return $returnhash{$qualifierrest};
3147: }
3148: # ----------------------------------------------------------------- user.course
3149: } elsif ($space eq 'course') {
3150: # FIXME - not supporting calls for a specific user
3151: return $ENV{join('.',('request.course',$qualifier))};
3152: # ------------------------------------------------------------------- user.role
3153: } elsif ($space eq 'role') {
3154: # FIXME - not supporting calls for a specific user
3155: my ($role,$where)=split(/\./,$ENV{'request.role'});
3156: if ($qualifier eq 'value') {
3157: return $role;
3158: } elsif ($qualifier eq 'extent') {
3159: return $where;
3160: }
3161: # ----------------------------------------------------------------- user.domain
3162: } elsif ($space eq 'domain') {
3163: return $udom;
3164: # ------------------------------------------------------------------- user.name
3165: } elsif ($space eq 'name') {
3166: return $uname;
3167: # ---------------------------------------------------- Any other user namespace
3168: } else {
3169: my %reply;
3170: if (!$publicuser) {
3171: %reply=&get($space,[$qualifierrest],$udom,$uname);
3172: }
3173: return $reply{$qualifierrest};
3174: }
3175: } elsif ($realm eq 'query') {
3176: # ---------------------------------------------- pull stuff out of query string
3177: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
3178: return $ENV{'form.'.$space};
3179: } elsif ($realm eq 'request') {
3180: # ------------------------------------------------------------- request.browser
3181: if ($space eq 'browser') {
3182: return $ENV{'browser.'.$qualifier};
3183: # ------------------------------------------------------------ request.filename
3184: } else {
3185: return $ENV{'request.'.$spacequalifierrest};
3186: }
3187: } elsif ($realm eq 'course') {
3188: # ---------------------------------------------------------- course.description
3189: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
3190: } elsif ($realm eq 'resource') {
3191:
3192: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
3193:
3194: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
3195:
3196: # ----------------------------------------------------- Cascading lookup scheme
3197: if (!$symbparm) { $symbparm=&symbread(); }
3198: my $symbp=$symbparm;
3199: my $mapp=(split(/\_\_\_/,$symbp))[0];
3200:
3201: my $symbparm=$symbp.'.'.$spacequalifierrest;
3202: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3203:
3204: my $section;
3205: if (($ENV{'user.name'} eq $uname) &&
3206: ($ENV{'user.domain'} eq $udom)) {
3207: $section=$ENV{'request.course.sec'};
3208: } else {
3209: $section=&usection($udom,$uname,$courseid);
3210: }
3211:
3212: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3213: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3214: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3215:
3216: my $courselevel=$courseid.'.'.$spacequalifierrest;
3217: my $courselevelr=$courseid.'.'.$symbparm;
3218: my $courselevelm=$courseid.'.'.$mapparm;
3219:
3220: # ----------------------------------------------------------- first, check user
3221: #most student don't have any data set, check if there is some data
3222: #every thirty minutes
3223: if (!
3224: (exists($ENV{'cache.studentresdata'})
3225: && (($ENV{'cache.studentresdata'}+1800) > time))) {
3226: my %resourcedata=&get('resourcedata',
3227: [$courselevelr,$courselevelm,$courselevel],
3228: $udom,$uname);
3229: my ($tmp)=keys(%resourcedata);
3230: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
3231: if ($resourcedata{$courselevelr}) {
3232: return $resourcedata{$courselevelr}; }
3233: if ($resourcedata{$courselevelm}) {
3234: return $resourcedata{$courselevelm}; }
3235: if ($resourcedata{$courselevel}) {
3236: return $resourcedata{$courselevel}; }
3237: } else {
3238: if ($tmp!~/No such file/) {
3239: &logthis("<font color=blue>WARNING:".
3240: " Trying to get resource data for ".
3241: $uname." at ".$udom.": ".
3242: $tmp."</font>");
3243: } elsif ($tmp=~/error:No such file/) {
3244: $ENV{'cache.studentresdata'}=time;
3245: &appenv(('cache.studentresdata'=>
3246: $ENV{'cache.studentresdata'}));
3247: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3248: return $tmp;
3249: }
3250: }
3251: }
3252:
3253: # -------------------------------------------------------- second, check course
3254:
3255: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3256: $ENV{'course.'.$courseid.'.domain'},
3257: ($seclevelr,$seclevelm,$seclevel,
3258: $courselevelr,$courselevelm,
3259: $courselevel));
3260: if (defined($coursereply)) { return $coursereply; }
3261:
3262: # ------------------------------------------------------ third, check map parms
3263: my %parmhash=();
3264: my $thisparm='';
3265: if (tie(%parmhash,'GDBM_File',
3266: $ENV{'request.course.fn'}.'_parms.db',
3267: &GDBM_READER(),0640)) {
3268: $thisparm=$parmhash{$symbparm};
3269: untie(%parmhash);
3270: }
3271: if ($thisparm) { return $thisparm; }
3272: }
3273: # --------------------------------------------- last, look in resource metadata
3274:
3275: $spacequalifierrest=~s/\./\_/;
3276: my $filename;
3277: if (!$symbparm) { $symbparm=&symbread(); }
3278: if ($symbparm) {
3279: $filename=(split(/\_\_\_/,$symbparm))[2];
3280: } else {
3281: $filename=$ENV{'request.filename'};
3282: }
3283: my $metadata=&metadata($filename,$spacequalifierrest);
3284: if (defined($metadata)) { return $metadata; }
3285: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
3286: if (defined($metadata)) { return $metadata; }
3287:
3288: # ------------------------------------------------------------------ Cascade up
3289: unless ($space eq '0') {
3290: my @parts=split(/_/,$space);
3291: my $id=pop(@parts);
3292: my $part=join('_',@parts);
3293: if ($part eq '') { $part='0'; }
3294: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
3295: $symbparm,$udom,$uname);
3296: if (defined($partgeneral)) { return $partgeneral; }
3297: }
3298:
3299: # ---------------------------------------------------- Any other user namespace
3300: } elsif ($realm eq 'environment') {
3301: # ----------------------------------------------------------------- environment
3302: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3303: return $ENV{'environment.'.$spacequalifierrest};
3304: } else {
3305: my %returnhash=&userenvironment($udom,$uname,
3306: $spacequalifierrest);
3307: return $returnhash{$spacequalifierrest};
3308: }
3309: } elsif ($realm eq 'system') {
3310: # ----------------------------------------------------------------- system.time
3311: if ($space eq 'time') {
3312: return time;
3313: }
3314: }
3315: return '';
3316: }
3317:
3318: sub add_prefix_and_part {
3319: my ($prefix,$part)=@_;
3320: my $keyroot;
3321: if (defined($prefix) && $prefix !~ /^__/) {
3322: # prefix that has a part already
3323: $keyroot=$prefix;
3324: } elsif (defined($prefix)) {
3325: # prefix that is missing a part
3326: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3327: } else {
3328: # no prefix at all
3329: if (defined($part)) { $keyroot='_'.$part; }
3330: }
3331: return $keyroot;
3332: }
3333:
3334: # ---------------------------------------------------------------- Get metadata
3335:
3336: sub metadata {
3337: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3338:
3339: $uri=&declutter($uri);
3340: # if it is a non metadata possible uri return quickly
3341: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3342: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|)) {
3343: return '';
3344: }
3345: my $filename=$uri;
3346: $uri=~s/\.meta$//;
3347: #
3348: # Is the metadata already cached?
3349: # Look at timestamp of caching
3350: # Everything is cached by the main uri, libraries are never directly cached
3351: #
3352: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
3353: #
3354: # Is this a recursive call for a library?
3355: #
3356: if ($liburi) {
3357: $liburi=&declutter($liburi);
3358: $filename=$liburi;
3359: }
3360: my %metathesekeys=();
3361: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3362: my $metastring=&getfile(&filelocation('',&clutter($filename)));
3363: my $parser=HTML::LCParser->new(\$metastring);
3364: my $token;
3365: undef %metathesekeys;
3366: while ($token=$parser->get_token) {
3367: if ($token->[0] eq 'S') {
3368: if (defined($token->[2]->{'package'})) {
3369: #
3370: # This is a package - get package info
3371: #
3372: my $package=$token->[2]->{'package'};
3373: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3374: if (defined($token->[2]->{'id'})) {
3375: $keyroot.='_'.$token->[2]->{'id'};
3376: }
3377: if ($metacache{$uri.':packages'}) {
3378: $metacache{$uri.':packages'}.=','.$package.$keyroot;
3379: } else {
3380: $metacache{$uri.':packages'}=$package.$keyroot;
3381: }
3382: foreach (keys %packagetab) {
3383: if ($_=~/^$package\&/) {
3384: my ($pack,$name,$subp)=split(/\&/,$_);
3385: my $value=$packagetab{$_};
3386: my $part=$keyroot;
3387: $part=~s/^\_//;
3388: if ($subp eq 'display') {
3389: $value.=' [Part: '.$part.']';
3390: }
3391: my $unikey='parameter'.$keyroot.'_'.$name;
3392: if ($subp eq 'default') {
3393: $unikey='parameter_0_'.$name;
3394: $metacache{$uri.':'.$unikey.'.part'}='0';
3395: } else {
3396: $metacache{$uri.':'.$unikey.'.part'}=$part;
3397: $metathesekeys{$unikey}=1;
3398: }
3399: unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
3400: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
3401: }
3402: if (defined($metacache{$uri.':'.$unikey.'.default'})) {
3403: $metacache{$uri.':'.$unikey}=
3404: $metacache{$uri.':'.$unikey.'.default'};
3405: }
3406: }
3407: }
3408: } else {
3409: #
3410: # This is not a package - some other kind of start tag
3411: #
3412: my $entry=$token->[1];
3413: my $unikey;
3414: if ($entry eq 'import') {
3415: $unikey='';
3416: } else {
3417: $unikey=$entry;
3418: }
3419: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3420:
3421: if (defined($token->[2]->{'id'})) {
3422: $unikey.='_'.$token->[2]->{'id'};
3423: }
3424:
3425: if ($entry eq 'import') {
3426: #
3427: # Importing a library here
3428: #
3429: if ($depthcount<20) {
3430: my $location=$parser->get_text('/import');
3431: my $dir=$filename;
3432: $dir=~s|[^/]*$||;
3433: $location=&filelocation($dir,$location);
3434: foreach (sort(split(/\,/,&metadata($uri,'keys',
3435: $location,$unikey,
3436: $depthcount+1)))) {
3437: $metathesekeys{$_}=1;
3438: }
3439: }
3440: } else {
3441:
3442: if (defined($token->[2]->{'name'})) {
3443: $unikey.='_'.$token->[2]->{'name'};
3444: }
3445: $metathesekeys{$unikey}=1;
3446: foreach (@{$token->[3]}) {
3447: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
3448: }
3449: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
3450: my $default=$metacache{$uri.':'.$unikey.'.default'};
3451: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
3452: # only ws inside the tag, and not in default, so use default
3453: # as value
3454: $metacache{$uri.':'.$unikey}=$default;
3455: } else {
3456: # either something interesting inside the tag or default
3457: # uninteresting
3458: $metacache{$uri.':'.$unikey}=$internaltext;
3459: }
3460: # end of not-a-package not-a-library import
3461: }
3462: # end of not-a-package start tag
3463: }
3464: # the next is the end of "start tag"
3465: }
3466: }
3467: # are there custom rights to evaluate
3468: if ($metacache{$uri.':copyright'} eq 'custom') {
3469:
3470: #
3471: # Importing a rights file here
3472: #
3473: unless ($depthcount) {
3474: my $location=$metacache{$uri.':customdistributionfile'};
3475: my $dir=$filename;
3476: $dir=~s|[^/]*$||;
3477: $location=&filelocation($dir,$location);
3478: foreach (sort(split(/\,/,&metadata($uri,'keys',
3479: $location,'_rights',
3480: $depthcount+1)))) {
3481: $metathesekeys{$_}=1;
3482: }
3483: }
3484: }
3485: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
3486: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
3487: $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
3488: $metacache{$uri.':cachedtimestamp'}=time;
3489: # this is the end of "was not already recently cached
3490: }
3491: return $metacache{$uri.':'.$what};
3492: }
3493:
3494: sub metadata_generate_part0 {
3495: my ($metadata,$metacache,$uri) = @_;
3496: my %allnames;
3497: foreach my $metakey (sort keys %$metadata) {
3498: if ($metakey=~/^parameter\_(.*)/) {
3499: my $part=$$metacache{$uri.':'.$metakey.'.part'};
3500: my $name=$$metacache{$uri.':'.$metakey.'.name'};
3501: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
3502: $allnames{$name}=$part;
3503: }
3504: }
3505: }
3506: foreach my $name (keys(%allnames)) {
3507: $$metadata{"parameter_0_$name"}=1;
3508: my $key="$uri:parameter_0_$name";
3509: $$metacache{"$key.part"}='0';
3510: $$metacache{"$key.name"}=$name;
3511: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
3512: $allnames{$name}.'_'.$name.
3513: '.type'};
3514: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
3515: '.display'};
3516: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3517: $olddis=~s/$expr/\[Part: 0\]/;
3518: $$metacache{"$key.display"}=$olddis;
3519: }
3520: }
3521:
3522: # ------------------------------------------------- Get the title of a resource
3523:
3524: sub gettitle {
3525: my $urlsymb=shift;
3526: my $symb=&symbread($urlsymb);
3527: unless ($symb) {
3528: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3529: return &metadata($urlsymb,'title');
3530: }
3531: if ($titlecache{$symb}) { return $titlecache{$symb}; }
3532: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3533: my $title='';
3534: my %bighash;
3535: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3536: &GDBM_READER(),0640)) {
3537: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3538: $title=$bighash{'title_'.$mapid.'.'.$resid};
3539: untie %bighash;
3540: }
3541: if ($title) {
3542: $titlecache{$symb}=$title;
3543: return $title;
3544: } else {
3545: return &metadata($urlsymb,'title');
3546: }
3547: }
3548:
3549: # ------------------------------------------------- Update symbolic store links
3550:
3551: sub symblist {
3552: my ($mapname,%newhash)=@_;
3553: $mapname=declutter($mapname);
3554: my %hash;
3555: if (($ENV{'request.course.fn'}) && (%newhash)) {
3556: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3557: &GDBM_WRCREAT(),0640)) {
3558: foreach (keys %newhash) {
3559: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
3560: }
3561: if (untie(%hash)) {
3562: return 'ok';
3563: }
3564: }
3565: }
3566: return 'error';
3567: }
3568:
3569: # --------------------------------------------------------------- Verify a symb
3570:
3571: sub symbverify {
3572: my ($symb,$thisfn)=@_;
3573: $thisfn=&declutter($thisfn);
3574: # direct jump to resource in page or to a sequence - will construct own symbs
3575: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
3576: # check URL part
3577: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3578: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
3579:
3580: $symb=&symbclean($symb);
3581:
3582: my %bighash;
3583: my $okay=0;
3584: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3585: &GDBM_READER(),0640)) {
3586: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3587: unless ($ids) {
3588: $ids=$bighash{'ids_/'.$thisfn};
3589: }
3590: if ($ids) {
3591: # ------------------------------------------------------------------- Has ID(s)
3592: foreach (split(/\,/,$ids)) {
3593: my ($mapid,$resid)=split(/\./,$_);
3594: if (
3595: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
3596: eq $symb) {
3597: $okay=1;
3598: }
3599: }
3600: }
3601: untie(%bighash);
3602: }
3603: return $okay;
3604: }
3605:
3606: # --------------------------------------------------------------- Clean-up symb
3607:
3608: sub symbclean {
3609: my $symb=shift;
3610:
3611: # remove version from map
3612: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
3613:
3614: # remove version from URL
3615: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
3616:
3617: return $symb;
3618: }
3619:
3620: # ------------------------------------------------------ Return symb list entry
3621:
3622: sub symbread {
3623: my ($thisfn,$donotrecurse)=@_;
3624: # no filename provided? try from environment
3625: unless ($thisfn) {
3626: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
3627: $thisfn=$ENV{'request.filename'};
3628: }
3629: # is that filename actually a symb? Verify, clean, and return
3630: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
3631: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
3632: }
3633: $thisfn=declutter($thisfn);
3634: my %hash;
3635: my %bighash;
3636: my $syval='';
3637: if (($ENV{'request.course.fn'}) && ($thisfn)) {
3638: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3639: &GDBM_READER(),0640)) {
3640: $syval=$hash{$thisfn};
3641: untie(%hash);
3642: }
3643: # ---------------------------------------------------------- There was an entry
3644: if ($syval) {
3645: unless ($syval=~/\_\d+$/) {
3646: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
3647: &appenv('request.ambiguous' => $thisfn);
3648: return '';
3649: }
3650: $syval.=$1;
3651: }
3652: } else {
3653: # ------------------------------------------------------- Was not in symb table
3654: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3655: &GDBM_READER(),0640)) {
3656: # ---------------------------------------------- Get ID(s) for current resource
3657: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3658: unless ($ids) {
3659: $ids=$bighash{'ids_/'.$thisfn};
3660: }
3661: unless ($ids) {
3662: # alias?
3663: $ids=$bighash{'mapalias_'.$thisfn};
3664: }
3665: if ($ids) {
3666: # ------------------------------------------------------------------- Has ID(s)
3667: my @possibilities=split(/\,/,$ids);
3668: if ($#possibilities==0) {
3669: # ----------------------------------------------- There is only one possibility
3670: my ($mapid,$resid)=split(/\./,$ids);
3671: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
3672: } elsif (!$donotrecurse) {
3673: # ------------------------------------------ There is more than one possibility
3674: my $realpossible=0;
3675: foreach (@possibilities) {
3676: my $file=$bighash{'src_'.$_};
3677: if (&allowed('bre',$file)) {
3678: my ($mapid,$resid)=split(/\./,$_);
3679: if ($bighash{'map_type_'.$mapid} ne 'page') {
3680: $realpossible++;
3681: $syval=declutter($bighash{'map_id_'.$mapid}).
3682: '___'.$resid;
3683: }
3684: }
3685: }
3686: if ($realpossible!=1) { $syval=''; }
3687: } else {
3688: $syval='';
3689: }
3690: }
3691: untie(%bighash)
3692: }
3693: }
3694: if ($syval) {
3695: return &symbclean($syval.'___'.$thisfn);
3696: }
3697: }
3698: &appenv('request.ambiguous' => $thisfn);
3699: return '';
3700: }
3701:
3702: # ---------------------------------------------------------- Return random seed
3703:
3704: sub numval {
3705: my $txt=shift;
3706: $txt=~tr/A-J/0-9/;
3707: $txt=~tr/a-j/0-9/;
3708: $txt=~tr/K-T/0-9/;
3709: $txt=~tr/k-t/0-9/;
3710: $txt=~tr/U-Z/0-5/;
3711: $txt=~tr/u-z/0-5/;
3712: $txt=~s/\D//g;
3713: return int($txt);
3714: }
3715:
3716: sub rndseed {
3717: my ($symb,$courseid,$domain,$username)=@_;
3718: if (!$symb) {
3719: unless ($symb=&symbread()) { return time; }
3720: }
3721: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
3722: if (!$domain) {$domain=$ENV{'user.domain'};}
3723: if (!$username) {$username=$ENV{'user.name'};}
3724: {
3725: use integer;
3726: my $symbchck=unpack("%32C*",$symb) << 27;
3727: my $symbseed=numval($symb) << 22;
3728: my $namechck=unpack("%32C*",$username) << 17;
3729: my $nameseed=numval($username) << 12;
3730: my $domainseed=unpack("%32C*",$domain) << 7;
3731: my $courseseed=unpack("%32C*",$courseid);
3732: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
3733: #uncommenting these lines can break things!
3734: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
3735: #&Apache::lonxml::debug("rndseed :$num:$symb");
3736: return $num;
3737: }
3738: }
3739:
3740: sub ireceipt {
3741: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
3742: my $cuname=unpack("%32C*",$funame);
3743: my $cudom=unpack("%32C*",$fudom);
3744: my $cucourseid=unpack("%32C*",$fucourseid);
3745: my $cusymb=unpack("%32C*",$fusymb);
3746: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
3747: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
3748: ($cunique%$cuname+
3749: $cunique%$cudom+
3750: $cusymb%$cuname+
3751: $cusymb%$cudom+
3752: $cucourseid%$cuname+
3753: $cucourseid%$cudom);
3754: }
3755:
3756: sub receipt {
3757: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
3758: return &ireceipt($name,$domain,$courseid,$symb);
3759: }
3760:
3761: # ------------------------------------------------------------ Serves up a file
3762: # returns either the contents of the file or a -1
3763: sub getfile {
3764: my $file=shift;
3765: if ($file=~/^\/*uploaded\//) { # user file
3766: my $ua=new LWP::UserAgent;
3767: my $request=new HTTP::Request('GET',&tokenwrapper($file));
3768: my $response=$ua->request($request);
3769: if ($response->is_success()) {
3770: return $response->content;
3771: } else {
3772: return -1;
3773: }
3774: } else { # normal file from res space
3775: &repcopy($file);
3776: if (! -e $file ) { return -1; };
3777: my $fh=Apache::File->new($file);
3778: my $a='';
3779: while (<$fh>) { $a .=$_; }
3780: return $a;
3781: }
3782: }
3783:
3784: sub filelocation {
3785: my ($dir,$file) = @_;
3786: my $location;
3787: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
3788: if ($file=~m:^/~:) { # is a contruction space reference
3789: $location = $file;
3790: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
3791: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
3792: $location=$file;
3793: } else {
3794: $file=~s/^$perlvar{'lonDocRoot'}//;
3795: $file=~s:^/*res::;
3796: if ( !( $file =~ m:^/:) ) {
3797: $location = $dir. '/'.$file;
3798: } else {
3799: $location = '/home/httpd/html/res'.$file;
3800: }
3801: }
3802: $location=~s://+:/:g; # remove duplicate /
3803: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
3804: return $location;
3805: }
3806:
3807: sub hreflocation {
3808: my ($dir,$file)=@_;
3809: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
3810: my $finalpath=filelocation($dir,$file);
3811: $finalpath=~s/^\/home\/httpd\/html//;
3812: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
3813: return $finalpath;
3814: } else {
3815: return $file;
3816: }
3817: }
3818:
3819: # ------------------------------------------------------------- Declutters URLs
3820:
3821: sub declutter {
3822: my $thisfn=shift;
3823: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
3824: $thisfn=~s/^\///;
3825: $thisfn=~s/^res\///;
3826: $thisfn=~s/\?.+$//;
3827: return $thisfn;
3828: }
3829:
3830: # ------------------------------------------------------------- Clutter up URLs
3831:
3832: sub clutter {
3833: my $thisfn='/'.&declutter(shift);
3834: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
3835: $thisfn='/res'.$thisfn;
3836: }
3837: return $thisfn;
3838: }
3839:
3840: # -------------------------------------------------------- Escape Special Chars
3841:
3842: sub escape {
3843: my $str=shift;
3844: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3845: return $str;
3846: }
3847:
3848: # ----------------------------------------------------- Un-Escape Special Chars
3849:
3850: sub unescape {
3851: my $str=shift;
3852: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3853: return $str;
3854: }
3855:
3856: # ================================================================ Main Program
3857:
3858: sub goodbye {
3859: &logthis("Starting Shut down");
3860: &flushcourselogs();
3861: &logthis("Shutting down");
3862: }
3863:
3864: BEGIN {
3865: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
3866: unless ($readit) {
3867: {
3868: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
3869:
3870: while (my $configline=<$config>) {
3871: if ($configline =~ /^[^\#]*PerlSetVar/) {
3872: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3873: chomp($varvalue);
3874: $perlvar{$varname}=$varvalue;
3875: }
3876: }
3877: }
3878: {
3879: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
3880:
3881: while (my $configline=<$config>) {
3882: if ($configline =~ /^[^\#]*PerlSetVar/) {
3883: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3884: chomp($varvalue);
3885: $perlvar{$varname}=$varvalue;
3886: }
3887: }
3888: }
3889:
3890: # ------------------------------------------------------------ Read domain file
3891: {
3892: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
3893: '/domain.tab');
3894: %domaindescription = ();
3895: %domain_auth_def = ();
3896: %domain_auth_arg_def = ();
3897: if ($fh) {
3898: while (<$fh>) {
3899: next if /^\#/;
3900: chomp;
3901: my ($domain, $domain_description, $def_auth, $def_auth_arg)
3902: = split(/:/,$_,4);
3903: $domain_auth_def{$domain}=$def_auth;
3904: $domain_auth_arg_def{$domain}=$def_auth_arg;
3905: $domaindescription{$domain}=$domain_description;
3906: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
3907: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
3908: }
3909: }
3910: }
3911:
3912:
3913: # ------------------------------------------------------------- Read hosts file
3914: {
3915: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
3916:
3917: while (my $configline=<$config>) {
3918: next if ($configline =~ /^(\#|\s*$)/);
3919: chomp($configline);
3920: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
3921: if ($id && $domain && $role && $name && $ip) {
3922: $hostname{$id}=$name;
3923: $hostdom{$id}=$domain;
3924: $hostip{$id}=$ip;
3925: $iphost{$ip}=$id;
3926: if ($role eq 'library') { $libserv{$id}=$name; }
3927: } else {
3928: if ($configline) {
3929: &logthis("Skipping hosts.tab line -$configline-");
3930: }
3931: }
3932: }
3933: }
3934:
3935: # ------------------------------------------------------ Read spare server file
3936: {
3937: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3938:
3939: while (my $configline=<$config>) {
3940: chomp($configline);
3941: if ($configline) {
3942: $spareid{$configline}=1;
3943: }
3944: }
3945: }
3946: # ------------------------------------------------------------ Read permissions
3947: {
3948: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3949:
3950: while (my $configline=<$config>) {
3951: chomp($configline);
3952: if ($configline) {
3953: my ($role,$perm)=split(/ /,$configline);
3954: if ($perm ne '') { $pr{$role}=$perm; }
3955: }
3956: }
3957: }
3958:
3959: # -------------------------------------------- Read plain texts for permissions
3960: {
3961: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3962:
3963: while (my $configline=<$config>) {
3964: chomp($configline);
3965: if ($configline) {
3966: my ($short,$plain)=split(/:/,$configline);
3967: if ($plain ne '') { $prp{$short}=$plain; }
3968: }
3969: }
3970: }
3971:
3972: # ---------------------------------------------------------- Read package table
3973: {
3974: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3975:
3976: while (my $configline=<$config>) {
3977: chomp($configline);
3978: my ($short,$plain)=split(/:/,$configline);
3979: my ($pack,$name)=split(/\&/,$short);
3980: if ($plain ne '') {
3981: $packagetab{$pack.'&'.$name.'&name'}=$name;
3982: $packagetab{$short}=$plain;
3983: }
3984: }
3985: }
3986:
3987: # ------------- set up temporary directory
3988: {
3989: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
3990:
3991: }
3992:
3993: %metacache=();
3994:
3995: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
3996: $dumpcount=0;
3997:
3998: &logtouch();
3999: &logthis('<font color=yellow>INFO: Read configuration</font>');
4000: $readit=1;
4001: }
4002: }
4003:
4004: 1;
4005: __END__
4006:
4007: =pod
4008:
4009: =head1 NAME
4010:
4011: Apache::lonnet - Subroutines to ask questions about things in the network.
4012:
4013: =head1 SYNOPSIS
4014:
4015: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
4016:
4017: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
4018:
4019: Common parameters:
4020:
4021: =over 4
4022:
4023: =item *
4024:
4025: $uname : an internal username (if $cname expecting a course Id specifically)
4026:
4027: =item *
4028:
4029: $udom : a domain (if $cdom expecting a course's domain specifically)
4030:
4031: =item *
4032:
4033: $symb : a resource instance identifier
4034:
4035: =item *
4036:
4037: $namespace : the name of a .db file that contains the data needed or
4038: being set.
4039:
4040: =back
4041:
4042: =head1 INTRODUCTION
4043:
4044: This module provides subroutines which interact with the
4045: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
4046: - classes
4047: - users
4048: - resources
4049:
4050: For many of these objects you can also use this to store data about
4051: them or modify them in various ways.
4052:
4053: This is part of the LearningOnline Network with CAPA project
4054: described at http://www.lon-capa.org.
4055:
4056: =head1 RETURN MESSAGES
4057:
4058: =over 4
4059:
4060: =item *
4061:
4062: con_lost : unable to contact remote host
4063:
4064: =item *
4065:
4066: con_delayed : unable to contact remote host, message will be delivered
4067: when the connection is brought back up
4068:
4069: =item *
4070:
4071: con_failed : unable to contact remote host and unable to save message
4072: for later delivery
4073:
4074: =item *
4075:
4076: error: : an error a occured, a description of the error follows the :
4077:
4078: =item *
4079:
4080: no_such_host : unable to fund a host associated with the user/domain
4081: that was requested
4082:
4083: =back
4084:
4085: =head1 PUBLIC SUBROUTINES
4086:
4087: =head2 Session Environment Functions
4088:
4089: =over 4
4090:
4091: =item *
4092:
4093: appenv(%hash) : the value of %hash is written to the user envirnoment
4094: file, and will be restored for each access this user makes during this
4095: session, also modifies the %ENV for the current process
4096:
4097: =item *
4098:
4099: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
4100:
4101: =back
4102:
4103: =head2 User Information
4104:
4105: =over 4
4106:
4107: =item *
4108:
4109: queryauthenticate($uname,$udom) : try to determine user's current
4110: authentication scheme
4111:
4112: =item *
4113:
4114: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
4115: servers (first use the current one), $upass should be the users password
4116:
4117: =item *
4118:
4119: homeserver($uname,$udom) : find the server which has the user's
4120: directory and files (there must be only one), this caches the answer,
4121: and also caches if there is a borken connection.
4122:
4123: =item *
4124:
4125: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
4126: unique resource in a domain, there must be only 1 ID per username, and
4127: only 1 username per ID in a specific domain) (returns hash:
4128: id=>name,id=>name)
4129:
4130: =item *
4131:
4132: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
4133: name=>id,name=>id)
4134:
4135: =item *
4136:
4137: idput($udom,%ids) : store away a list of names and associated IDs
4138:
4139: =item *
4140:
4141: rolesinit($udom,$username,$authhost) : get user privileges
4142:
4143: =item *
4144:
4145: usection($udom,$uname,$cname) : finds the section of student in the
4146: course $cname, return section name/number or '' for "not in course"
4147: and '-1' for "no section"
4148:
4149: =item *
4150:
4151: userenvironment($udom,$uname,@what) : gets the values of the keys
4152: passed in @what from the requested user's environment, returns a hash
4153:
4154: =back
4155:
4156: =head2 User Roles
4157:
4158: =over 4
4159:
4160: =item *
4161:
4162: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
4163: actions
4164: F: full access
4165: U,I,K: authentication modes (cxx only)
4166: '': forbidden
4167: 1: user needs to choose course
4168: 2: browse allowed
4169:
4170: =item *
4171:
4172: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
4173: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
4174: and course level
4175:
4176: =item *
4177:
4178: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
4179: explanation of a user role term
4180:
4181: =back
4182:
4183: =head2 User Modification
4184:
4185: =over 4
4186:
4187: =item *
4188:
4189: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
4190: user for the level given by URL. Optional start and end dates (leave empty
4191: string or zero for "no date")
4192:
4193: =item *
4194:
4195: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
4196: change a users, password, possible return values are: ok,
4197: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
4198: refused
4199:
4200: =item *
4201:
4202: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
4203:
4204: =item *
4205:
4206: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
4207: modify user
4208:
4209: =item *
4210:
4211: modifystudent
4212:
4213: modify a students enrollment and identification information.
4214: The course id is resolved based on the current users environment.
4215: This means the envoking user must be a course coordinator or otherwise
4216: associated with a course.
4217:
4218: This call is essentially a wrapper for lonnet::modifyuser and
4219: lonnet::modify_student_enrollment
4220:
4221: Inputs:
4222:
4223: =over 4
4224:
4225: =item B<$udom> Students loncapa domain
4226:
4227: =item B<$uname> Students loncapa login name
4228:
4229: =item B<$uid> Students id/student number
4230:
4231: =item B<$umode> Students authentication mode
4232:
4233: =item B<$upass> Students password
4234:
4235: =item B<$first> Students first name
4236:
4237: =item B<$middle> Students middle name
4238:
4239: =item B<$last> Students last name
4240:
4241: =item B<$gene> Students generation
4242:
4243: =item B<$usec> Students section in course
4244:
4245: =item B<$end> Unix time of the roles expiration
4246:
4247: =item B<$start> Unix time of the roles start date
4248:
4249: =item B<$forceid> If defined, allow $uid to be changed
4250:
4251: =item B<$desiredhome> server to use as home server for student
4252:
4253: =back
4254:
4255: =item *
4256:
4257: modify_student_enrollment
4258:
4259: Change a students enrollment status in a class. The environment variable
4260: 'role.request.course' must be defined for this function to proceed.
4261:
4262: Inputs:
4263:
4264: =over 4
4265:
4266: =item $udom, students domain
4267:
4268: =item $uname, students name
4269:
4270: =item $uid, students user id
4271:
4272: =item $first, students first name
4273:
4274: =item $middle
4275:
4276: =item $last
4277:
4278: =item $gene
4279:
4280: =item $usec
4281:
4282: =item $end
4283:
4284: =item $start
4285:
4286: =back
4287:
4288:
4289: =item *
4290:
4291: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
4292: custom role; give a custom role to a user for the level given by URL. Specify
4293: name and domain of role author, and role name
4294:
4295: =item *
4296:
4297: revokerole($udom,$uname,$url,$role) : revoke a role for url
4298:
4299: =item *
4300:
4301: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
4302:
4303: =back
4304:
4305: =head2 Course Infomation
4306:
4307: =over 4
4308:
4309: =item *
4310:
4311: coursedescription($courseid) : course description
4312:
4313: =item *
4314:
4315: courseresdata($coursenum,$coursedomain,@which) : request for current
4316: parameter setting for a specific course, @what should be a list of
4317: parameters to ask about. This routine caches answers for 5 minutes.
4318:
4319: =back
4320:
4321: =head2 Course Modification
4322:
4323: =over 4
4324:
4325: =item *
4326:
4327: writecoursepref($courseid,%prefs) : write preferences (environment
4328: database) for a course
4329:
4330: =item *
4331:
4332: createcourse($udom,$description,$url) : make/modify course
4333:
4334: =back
4335:
4336: =head2 Resource Subroutines
4337:
4338: =over 4
4339:
4340: =item *
4341:
4342: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
4343:
4344: =item *
4345:
4346: repcopy($filename) : subscribes to the requested file, and attempts to
4347: replicate from the owning library server, Might return
4348: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
4349: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
4350: resource. Expects the local filesystem pathname
4351: (/home/httpd/html/res/....)
4352:
4353: =back
4354:
4355: =head2 Resource Information
4356:
4357: =over 4
4358:
4359: =item *
4360:
4361: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
4362: a vairety of different possible values, $varname should be a request
4363: string, and the other parameters can be used to specify who and what
4364: one is asking about.
4365:
4366: Possible values for $varname are environment.lastname (or other item
4367: from the envirnment hash), user.name (or someother aspect about the
4368: user), resource.0.maxtries (or some other part and parameter of a
4369: resource)
4370:
4371: =item *
4372:
4373: directcondval($number) : get current value of a condition; reads from a state
4374: string
4375:
4376: =item *
4377:
4378: condval($condidx) : value of condition index based on state
4379:
4380: =item *
4381:
4382: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
4383: resource's metadata, $what should be either a specific key, or either
4384: 'keys' (to get a list of possible keys) or 'packages' to get a list of
4385: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
4386:
4387: this function automatically caches all requests
4388:
4389: =item *
4390:
4391: metadata_query($query,$custom,$customshow) : make a metadata query against the
4392: network of library servers; returns file handle of where SQL and regex results
4393: will be stored for query
4394:
4395: =item *
4396:
4397: symbread($filename) : return symbolic list entry (filename argument optional);
4398: returns the data handle
4399:
4400: =item *
4401:
4402: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
4403: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
4404: failure, user must be in a course, as it assumes the existance of the
4405: course initi hash, and uses $ENV('request.course.id'}
4406:
4407:
4408: =item *
4409:
4410: symbclean($symb) : removes versions numbers from a symb, returns the
4411: cleaned symb
4412:
4413: =item *
4414:
4415: is_on_map($uri) : checks if the $uri is somewhere on the current
4416: course map, user must be in a course for it to work.
4417:
4418: =item *
4419:
4420: numval($salt) : return random seed value (addend for rndseed)
4421:
4422: =item *
4423:
4424: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
4425: a random seed, all arguments are optional, if they aren't sent it uses the
4426: environment to derive them. Note: if symb isn't sent and it can't get one
4427: from &symbread it will use the current time as its return value
4428:
4429: =item *
4430:
4431: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
4432: unfakeable, receipt
4433:
4434: =item *
4435:
4436: receipt() : API to ireceipt working off of ENV values; given out to users
4437:
4438: =item *
4439:
4440: countacc($url) : count the number of accesses to a given URL
4441:
4442: =item *
4443:
4444: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
4445:
4446: =item *
4447:
4448: checkin($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 $tcrsid)
4449:
4450: =item *
4451:
4452: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
4453:
4454: =item *
4455:
4456: devalidate($symb) : devalidate temporary spreadsheet calculations,
4457: forcing spreadsheet to reevaluate the resource scores next time.
4458:
4459: =back
4460:
4461: =head2 Storing/Retreiving Data
4462:
4463: =over 4
4464:
4465: =item *
4466:
4467: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
4468: for this url; hashref needs to be given and should be a \%hashname; the
4469: remaining args aren't required and if they aren't passed or are '' they will
4470: be derived from the ENV
4471:
4472: =item *
4473:
4474: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
4475: uses critical subroutine
4476:
4477: =item *
4478:
4479: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
4480: all args are optional
4481:
4482: =item *
4483:
4484: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
4485: works very similar to store/cstore, but all data is stored in a
4486: temporary location and can be reset using tmpreset, $storehash should
4487: be a hash reference, returns nothing on success
4488:
4489: =item *
4490:
4491: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
4492: similar to restore, but all data is stored in a temporary location and
4493: can be reset using tmpreset. Returns a hash of values on success,
4494: error string otherwise.
4495:
4496: =item *
4497:
4498: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
4499: deltes all keys for $symb form the temporary storage hash.
4500:
4501: =item *
4502:
4503: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4504: reference filled in from namesp ($udom and $uname are optional)
4505:
4506: =item *
4507:
4508: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
4509: namesp ($udom and $uname are optional)
4510:
4511: =item *
4512:
4513: dump($namespace,$udom,$uname,$regexp) :
4514: dumps the complete (or key matching regexp) namespace into a hash
4515: ($udom, $uname and $regexp are optional)
4516:
4517: =item *
4518:
4519: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
4520: ($udom and $uname are optional)
4521:
4522: =item *
4523:
4524: cput($namespace,$storehash,$udom,$uname) : critical put
4525: ($udom and $uname are optional)
4526:
4527: =item *
4528:
4529: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4530: reference filled in from namesp (encrypts the return communication)
4531: ($udom and $uname are optional)
4532:
4533: =item *
4534:
4535: log($udom,$name,$home,$message) : write to permanent log for user; use
4536: critical subroutine
4537:
4538: =back
4539:
4540: =head2 Network Status Functions
4541:
4542: =over 4
4543:
4544: =item *
4545:
4546: dirlist($uri) : return directory list based on URI
4547:
4548: =item *
4549:
4550: spareserver() : find server with least workload from spare.tab
4551:
4552: =back
4553:
4554: =head2 Apache Request
4555:
4556: =over 4
4557:
4558: =item *
4559:
4560: ssi($url,%hash) : server side include, does a complete request cycle on url to
4561: localhost, posts hash
4562:
4563: =back
4564:
4565: =head2 Data to String to Data
4566:
4567: =over 4
4568:
4569: =item *
4570:
4571: hash2str(%hash) : convert a hash into a string complete with escaping and '='
4572: and '&' separators, supports elements that are arrayrefs and hashrefs
4573:
4574: =item *
4575:
4576: hashref2str($hashref) : convert a hashref into a string complete with
4577: escaping and '=' and '&' separators, supports elements that are
4578: arrayrefs and hashrefs
4579:
4580: =item *
4581:
4582: arrayref2str($arrayref) : convert an arrayref into a string complete
4583: with escaping and '&' separators, supports elements that are arrayrefs
4584: and hashrefs
4585:
4586: =item *
4587:
4588: str2hash($string) : convert string to hash using unescaping and
4589: splitting on '=' and '&', supports elements that are arrayrefs and
4590: hashrefs
4591:
4592: =item *
4593:
4594: str2array($string) : convert string to hash using unescaping and
4595: splitting on '&', supports elements that are arrayrefs and hashrefs
4596:
4597: =back
4598:
4599: =head2 Logging Routines
4600:
4601: =over 4
4602:
4603: These routines allow one to make log messages in the lonnet.log and
4604: lonnet.perm logfiles.
4605:
4606: =item *
4607:
4608: logtouch() : make sure the logfile, lonnet.log, exists
4609:
4610: =item *
4611:
4612: logthis() : append message to the normal lonnet.log file, it gets
4613: preiodically rolled over and deleted.
4614:
4615: =item *
4616:
4617: logperm() : append a permanent message to lonnet.perm.log, this log
4618: file never gets deleted by any automated portion of the system, only
4619: messages of critical importance should go in here.
4620:
4621: =back
4622:
4623: =head2 General File Helper Routines
4624:
4625: =over 4
4626:
4627: =item *
4628:
4629: getfile($file) : returns the entire contents of a file or -1; it
4630: properly subscribes to and replicates the file if neccessary.
4631:
4632: =item *
4633:
4634: filelocation($dir,$file) : returns file system location of a file
4635: based on URI; meant to be "fairly clean" absolute reference, $dir is a
4636: directory that relative $file lookups are to looked in ($dir of /a/dir
4637: and a file of ../bob will become /a/bob)
4638:
4639: =item *
4640:
4641: hreflocation($dir,$file) : returns file system location or a URL; same as
4642: filelocation except for hrefs
4643:
4644: =item *
4645:
4646: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
4647:
4648: =back
4649:
4650: =head2 HTTP Helper Routines
4651:
4652: =over 4
4653:
4654: =item *
4655:
4656: escape() : unpack non-word characters into CGI-compatible hex codes
4657:
4658: =item *
4659:
4660: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
4661:
4662: =back
4663:
4664: =head1 PRIVATE SUBROUTINES
4665:
4666: =head2 Underlying communication routines (Shouldn't call)
4667:
4668: =over 4
4669:
4670: =item *
4671:
4672: subreply() : tries to pass a message to lonc, returns con_lost if incapable
4673:
4674: =item *
4675:
4676: reply() : uses subreply to send a message to remote machine, logs all failures
4677:
4678: =item *
4679:
4680: critical() : passes a critical message to another server; if cannot
4681: get through then place message in connection buffer directory and
4682: returns con_delayed, if incapable of saving message, returns
4683: con_failed
4684:
4685: =item *
4686:
4687: reconlonc() : tries to reconnect lonc client processes.
4688:
4689: =back
4690:
4691: =head2 Resource Access Logging
4692:
4693: =over 4
4694:
4695: =item *
4696:
4697: flushcourselogs() : flush (save) buffer logs and access logs
4698:
4699: =item *
4700:
4701: courselog($what) : save message for course in hash
4702:
4703: =item *
4704:
4705: courseacclog($what) : save message for course using &courselog(). Perform
4706: special processing for specific resource types (problems, exams, quizzes, etc).
4707:
4708: =item *
4709:
4710: goodbye() : flush course logs and log shutting down; it is called in srm.conf
4711: as a PerlChildExitHandler
4712:
4713: =back
4714:
4715: =head2 Other
4716:
4717: =over 4
4718:
4719: =item *
4720:
4721: symblist($mapname,%newhash) : update symbolic storage links
4722:
4723: =back
4724:
4725: =cut
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