1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.348 2003/03/24 14:18:58 www 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 $processmarker $dumpcount
78: %coursedombuf %coursehombuf %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: sub flushcourselogs {
1032: &logthis('Flushing course log buffers');
1033: foreach (keys %courselogs) {
1034: my $crsid=$_;
1035: if (&reply('log:'.$coursedombuf{$crsid}.':'.
1036: &escape($courselogs{$crsid}),
1037: $coursehombuf{$crsid}) eq 'ok') {
1038: delete $courselogs{$crsid};
1039: } else {
1040: &logthis('Failed to flush log buffer for '.$crsid);
1041: if (length($courselogs{$crsid})>40000) {
1042: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1043: " exceeded maximum size, deleting.</font>");
1044: delete $courselogs{$crsid};
1045: }
1046: }
1047: }
1048: &logthis('Flushing access logs');
1049: foreach (keys %accesshash) {
1050: my $entry=$_;
1051: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
1052: my %temphash=($entry => $accesshash{$entry});
1053: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
1054: delete $accesshash{$entry};
1055: }
1056: }
1057: $dumpcount++;
1058: }
1059:
1060: sub courselog {
1061: my $what=shift;
1062: $what=time.':'.$what;
1063: unless ($ENV{'request.course.id'}) { return ''; }
1064: $coursedombuf{$ENV{'request.course.id'}}=
1065: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
1066: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1067: $coursehombuf{$ENV{'request.course.id'}}=
1068: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1069: if (defined $courselogs{$ENV{'request.course.id'}}) {
1070: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1071: } else {
1072: $courselogs{$ENV{'request.course.id'}}.=$what;
1073: }
1074: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1075: &flushcourselogs();
1076: }
1077: }
1078:
1079: sub courseacclog {
1080: my $fnsymb=shift;
1081: unless ($ENV{'request.course.id'}) { return ''; }
1082: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1083: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
1084: $what.=':POST';
1085: foreach (keys %ENV) {
1086: if ($_=~/^form\.(.*)/) {
1087: $what.=':'.$1.'='.$ENV{$_};
1088: }
1089: }
1090: }
1091: &courselog($what);
1092: }
1093:
1094: sub countacc {
1095: my $url=&declutter(shift);
1096: unless ($ENV{'request.course.id'}) { return ''; }
1097: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1098: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1099: if (defined($accesshash{$key})) {
1100: $accesshash{$key}++;
1101: } else {
1102: $accesshash{$key}=1;
1103: }
1104: }
1105:
1106: # ----------------------------------------------------------- Check out an item
1107:
1108: sub checkout {
1109: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1110: my $now=time;
1111: my $lonhost=$perlvar{'lonHostID'};
1112: my $infostr=&escape(
1113: 'CHECKOUTTOKEN&'.
1114: $tuname.'&'.
1115: $tudom.'&'.
1116: $tcrsid.'&'.
1117: $symb.'&'.
1118: $now.'&'.$ENV{'REMOTE_ADDR'});
1119: my $token=&reply('tmpput:'.$infostr,$lonhost);
1120: if ($token=~/^error\:/) {
1121: &logthis("<font color=blue>WARNING: ".
1122: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1123: "</font>");
1124: return '';
1125: }
1126:
1127: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1128: $token=~tr/a-z/A-Z/;
1129:
1130: my %infohash=('resource.0.outtoken' => $token,
1131: 'resource.0.checkouttime' => $now,
1132: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1133:
1134: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1135: return '';
1136: } else {
1137: &logthis("<font color=blue>WARNING: ".
1138: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1139: "</font>");
1140: }
1141:
1142: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1143: &escape('Checkout '.$infostr.' - '.
1144: $token)) ne 'ok') {
1145: return '';
1146: } else {
1147: &logthis("<font color=blue>WARNING: ".
1148: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1149: "</font>");
1150: }
1151: return $token;
1152: }
1153:
1154: # ------------------------------------------------------------ Check in an item
1155:
1156: sub checkin {
1157: my $token=shift;
1158: my $now=time;
1159: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1160: $lonhost=~tr/A-Z/a-z/;
1161: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1162: $dtoken=~s/\W/\_/g;
1163: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1164: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1165:
1166: unless (($tuname) && ($tudom)) {
1167: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1168: return '';
1169: }
1170:
1171: unless (&allowed('mgr',$tcrsid)) {
1172: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1173: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1174: return '';
1175: }
1176:
1177: my %infohash=('resource.0.intoken' => $token,
1178: 'resource.0.checkintime' => $now,
1179: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1180:
1181: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1182: return '';
1183: }
1184:
1185: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1186: &escape('Checkin - '.$token)) ne 'ok') {
1187: return '';
1188: }
1189:
1190: return ($symb,$tuname,$tudom,$tcrsid);
1191: }
1192:
1193: # --------------------------------------------- Set Expire Date for Spreadsheet
1194:
1195: sub expirespread {
1196: my ($uname,$udom,$stype,$usymb)=@_;
1197: my $cid=$ENV{'request.course.id'};
1198: if ($cid) {
1199: my $now=time;
1200: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1201: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1202: $ENV{'course.'.$cid.'.num'}.
1203: ':nohist_expirationdates:'.
1204: &escape($key).'='.$now,
1205: $ENV{'course.'.$cid.'.home'})
1206: }
1207: return 'ok';
1208: }
1209:
1210: # ----------------------------------------------------- Devalidate Spreadsheets
1211:
1212: sub devalidate {
1213: my ($symb,$uname,$udom)=@_;
1214: my $cid=$ENV{'request.course.id'};
1215: if ($cid) {
1216: # delete the stored spreadsheets for
1217: # - the student level sheet of this user in course's homespace
1218: # - the assessment level sheet for this resource
1219: # for this user in user's homespace
1220: my $key=$uname.':'.$udom.':';
1221: my $status=
1222: &del('nohist_calculatedsheets',
1223: [$key.'studentcalc'],
1224: $ENV{'course.'.$cid.'.domain'},
1225: $ENV{'course.'.$cid.'.num'})
1226: .' '.
1227: &del('nohist_calculatedsheets_'.$cid,
1228: [$key.'assesscalc:'.$symb]);
1229: unless ($status eq 'ok ok') {
1230: &logthis('Could not devalidate spreadsheet '.
1231: $uname.' at '.$udom.' for '.
1232: $symb.': '.$status);
1233: }
1234: }
1235: }
1236:
1237: sub get_scalar {
1238: my ($string,$end) = @_;
1239: my $value;
1240: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1241: $value = $1;
1242: } elsif ($$string =~ s/^([^&]*?)&//) {
1243: $value = $1;
1244: }
1245: return &unescape($value);
1246: }
1247:
1248: sub array2str {
1249: my (@array) = @_;
1250: my $result=&arrayref2str(\@array);
1251: $result=~s/^__ARRAY_REF__//;
1252: $result=~s/__END_ARRAY_REF__$//;
1253: return $result;
1254: }
1255:
1256: sub arrayref2str {
1257: my ($arrayref) = @_;
1258: my $result='__ARRAY_REF__';
1259: foreach my $elem (@$arrayref) {
1260: if(ref($elem) eq 'ARRAY') {
1261: $result.=&arrayref2str($elem).'&';
1262: } elsif(ref($elem) eq 'HASH') {
1263: $result.=&hashref2str($elem).'&';
1264: } elsif(ref($elem)) {
1265: #print("Got a ref of ".(ref($elem))." skipping.");
1266: } else {
1267: $result.=&escape($elem).'&';
1268: }
1269: }
1270: $result=~s/\&$//;
1271: $result .= '__END_ARRAY_REF__';
1272: return $result;
1273: }
1274:
1275: sub hash2str {
1276: my (%hash) = @_;
1277: my $result=&hashref2str(\%hash);
1278: $result=~s/^__HASH_REF__//;
1279: $result=~s/__END_HASH_REF__$//;
1280: return $result;
1281: }
1282:
1283: sub hashref2str {
1284: my ($hashref)=@_;
1285: my $result='__HASH_REF__';
1286: foreach (keys(%$hashref)) {
1287: if (ref($_) eq 'ARRAY') {
1288: $result.=&arrayref2str($_).'=';
1289: } elsif (ref($_) eq 'HASH') {
1290: $result.=&hashref2str($_).'=';
1291: } elsif (ref($_)) {
1292: $result.='=';
1293: #print("Got a ref of ".(ref($_))." skipping.");
1294: } else {
1295: if ($_) {$result.=&escape($_).'=';} else { last; }
1296: }
1297:
1298: if(ref($hashref->{$_}) eq 'ARRAY') {
1299: $result.=&arrayref2str($hashref->{$_}).'&';
1300: } elsif(ref($hashref->{$_}) eq 'HASH') {
1301: $result.=&hashref2str($hashref->{$_}).'&';
1302: } elsif(ref($hashref->{$_})) {
1303: $result.='&';
1304: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1305: } else {
1306: $result.=&escape($hashref->{$_}).'&';
1307: }
1308: }
1309: $result=~s/\&$//;
1310: $result .= '__END_HASH_REF__';
1311: return $result;
1312: }
1313:
1314: sub str2hash {
1315: my ($string)=@_;
1316: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1317: return %$hash;
1318: }
1319:
1320: sub str2hashref {
1321: my ($string) = @_;
1322:
1323: my %hash;
1324:
1325: if($string !~ /^__HASH_REF__/) {
1326: if (! ($string eq '' || !defined($string))) {
1327: $hash{'error'}='Not hash reference';
1328: }
1329: return (\%hash, $string);
1330: }
1331:
1332: $string =~ s/^__HASH_REF__//;
1333:
1334: while($string !~ /^__END_HASH_REF__/) {
1335: #key
1336: my $key='';
1337: if($string =~ /^__HASH_REF__/) {
1338: ($key, $string)=&str2hashref($string);
1339: if(defined($key->{'error'})) {
1340: $hash{'error'}='Bad data';
1341: return (\%hash, $string);
1342: }
1343: } elsif($string =~ /^__ARRAY_REF__/) {
1344: ($key, $string)=&str2arrayref($string);
1345: if($key->[0] eq 'Array reference error') {
1346: $hash{'error'}='Bad data';
1347: return (\%hash, $string);
1348: }
1349: } else {
1350: $string =~ s/^(.*?)=//;
1351: $key=&unescape($1);
1352: }
1353: $string =~ s/^=//;
1354:
1355: #value
1356: my $value='';
1357: if($string =~ /^__HASH_REF__/) {
1358: ($value, $string)=&str2hashref($string);
1359: if(defined($value->{'error'})) {
1360: $hash{'error'}='Bad data';
1361: return (\%hash, $string);
1362: }
1363: } elsif($string =~ /^__ARRAY_REF__/) {
1364: ($value, $string)=&str2arrayref($string);
1365: if($value->[0] eq 'Array reference error') {
1366: $hash{'error'}='Bad data';
1367: return (\%hash, $string);
1368: }
1369: } else {
1370: $value=&get_scalar(\$string,'__END_HASH_REF__');
1371: }
1372: $string =~ s/^&//;
1373:
1374: $hash{$key}=$value;
1375: }
1376:
1377: $string =~ s/^__END_HASH_REF__//;
1378:
1379: return (\%hash, $string);
1380: }
1381:
1382: sub str2array {
1383: my ($string)=@_;
1384: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1385: return @$array;
1386: }
1387:
1388: sub str2arrayref {
1389: my ($string) = @_;
1390: my @array;
1391:
1392: if($string !~ /^__ARRAY_REF__/) {
1393: if (! ($string eq '' || !defined($string))) {
1394: $array[0]='Array reference error';
1395: }
1396: return (\@array, $string);
1397: }
1398:
1399: $string =~ s/^__ARRAY_REF__//;
1400:
1401: while($string !~ /^__END_ARRAY_REF__/) {
1402: my $value='';
1403: if($string =~ /^__HASH_REF__/) {
1404: ($value, $string)=&str2hashref($string);
1405: if(defined($value->{'error'})) {
1406: $array[0] ='Array reference error';
1407: return (\@array, $string);
1408: }
1409: } elsif($string =~ /^__ARRAY_REF__/) {
1410: ($value, $string)=&str2arrayref($string);
1411: if($value->[0] eq 'Array reference error') {
1412: $array[0] ='Array reference error';
1413: return (\@array, $string);
1414: }
1415: } else {
1416: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1417: }
1418: $string =~ s/^&//;
1419:
1420: push(@array, $value);
1421: }
1422:
1423: $string =~ s/^__END_ARRAY_REF__//;
1424:
1425: return (\@array, $string);
1426: }
1427:
1428: # -------------------------------------------------------------------Temp Store
1429:
1430: sub tmpreset {
1431: my ($symb,$namespace,$domain,$stuname) = @_;
1432: if (!$symb) {
1433: $symb=&symbread();
1434: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1435: }
1436: $symb=escape($symb);
1437:
1438: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1439: $namespace=~s/\//\_/g;
1440: $namespace=~s/\W//g;
1441:
1442: #FIXME needs to do something for /pub resources
1443: if (!$domain) { $domain=$ENV{'user.domain'}; }
1444: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1445: my $path=$perlvar{'lonDaemons'}.'/tmp';
1446: my %hash;
1447: if (tie(%hash,'GDBM_File',
1448: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1449: &GDBM_WRCREAT(),0640)) {
1450: foreach my $key (keys %hash) {
1451: if ($key=~ /:$symb/) {
1452: delete($hash{$key});
1453: }
1454: }
1455: }
1456: }
1457:
1458: sub tmpstore {
1459: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1460:
1461: if (!$symb) {
1462: $symb=&symbread();
1463: if (!$symb) { $symb= $ENV{'request.url'}; }
1464: }
1465: $symb=escape($symb);
1466:
1467: if (!$namespace) {
1468: # I don't think we would ever want to store this for a course.
1469: # it seems this will only be used if we don't have a course.
1470: #$namespace=$ENV{'request.course.id'};
1471: #if (!$namespace) {
1472: $namespace=$ENV{'request.state'};
1473: #}
1474: }
1475: $namespace=~s/\//\_/g;
1476: $namespace=~s/\W//g;
1477: #FIXME needs to do something for /pub resources
1478: if (!$domain) { $domain=$ENV{'user.domain'}; }
1479: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1480: my $now=time;
1481: my %hash;
1482: my $path=$perlvar{'lonDaemons'}.'/tmp';
1483: if (tie(%hash,'GDBM_File',
1484: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1485: &GDBM_WRCREAT(),0640)) {
1486: $hash{"version:$symb"}++;
1487: my $version=$hash{"version:$symb"};
1488: my $allkeys='';
1489: foreach my $key (keys(%$storehash)) {
1490: $allkeys.=$key.':';
1491: $hash{"$version:$symb:$key"}=$$storehash{$key};
1492: }
1493: $hash{"$version:$symb:timestamp"}=$now;
1494: $allkeys.='timestamp';
1495: $hash{"$version:keys:$symb"}=$allkeys;
1496: if (untie(%hash)) {
1497: return 'ok';
1498: } else {
1499: return "error:$!";
1500: }
1501: } else {
1502: return "error:$!";
1503: }
1504: }
1505:
1506: # -----------------------------------------------------------------Temp Restore
1507:
1508: sub tmprestore {
1509: my ($symb,$namespace,$domain,$stuname) = @_;
1510:
1511: if (!$symb) {
1512: $symb=&symbread();
1513: if (!$symb) { $symb= $ENV{'request.url'}; }
1514: }
1515: $symb=escape($symb);
1516:
1517: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1518: #FIXME needs to do something for /pub resources
1519: if (!$domain) { $domain=$ENV{'user.domain'}; }
1520: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1521:
1522: my %returnhash;
1523: $namespace=~s/\//\_/g;
1524: $namespace=~s/\W//g;
1525: my %hash;
1526: my $path=$perlvar{'lonDaemons'}.'/tmp';
1527: if (tie(%hash,'GDBM_File',
1528: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1529: &GDBM_READER(),0640)) {
1530: my $version=$hash{"version:$symb"};
1531: $returnhash{'version'}=$version;
1532: my $scope;
1533: for ($scope=1;$scope<=$version;$scope++) {
1534: my $vkeys=$hash{"$scope:keys:$symb"};
1535: my @keys=split(/:/,$vkeys);
1536: my $key;
1537: $returnhash{"$scope:keys"}=$vkeys;
1538: foreach $key (@keys) {
1539: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1540: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1541: }
1542: }
1543: if (!(untie(%hash))) {
1544: return "error:$!";
1545: }
1546: } else {
1547: return "error:$!";
1548: }
1549: return %returnhash;
1550: }
1551:
1552: # ----------------------------------------------------------------------- Store
1553:
1554: sub store {
1555: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1556: my $home='';
1557:
1558: if ($stuname) { $home=&homeserver($stuname,$domain); }
1559:
1560: $symb=&symbclean($symb);
1561: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1562:
1563: if (!$domain) { $domain=$ENV{'user.domain'}; }
1564: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1565:
1566: &devalidate($symb,$stuname,$domain);
1567:
1568: $symb=escape($symb);
1569: if (!$namespace) {
1570: unless ($namespace=$ENV{'request.course.id'}) {
1571: return '';
1572: }
1573: }
1574: if (!$home) { $home=$ENV{'user.home'}; }
1575: my $namevalue='';
1576: foreach (keys %$storehash) {
1577: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1578: }
1579: $namevalue=~s/\&$//;
1580: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1581: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1582: }
1583:
1584: # -------------------------------------------------------------- Critical Store
1585:
1586: sub cstore {
1587: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1588: my $home='';
1589:
1590: if ($stuname) { $home=&homeserver($stuname,$domain); }
1591:
1592: $symb=&symbclean($symb);
1593: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1594:
1595: if (!$domain) { $domain=$ENV{'user.domain'}; }
1596: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1597:
1598: &devalidate($symb,$stuname,$domain);
1599:
1600: $symb=escape($symb);
1601: if (!$namespace) {
1602: unless ($namespace=$ENV{'request.course.id'}) {
1603: return '';
1604: }
1605: }
1606: if (!$home) { $home=$ENV{'user.home'}; }
1607:
1608: my $namevalue='';
1609: foreach (keys %$storehash) {
1610: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1611: }
1612: $namevalue=~s/\&$//;
1613: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1614: return critical
1615: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1616: }
1617:
1618: # --------------------------------------------------------------------- Restore
1619:
1620: sub restore {
1621: my ($symb,$namespace,$domain,$stuname) = @_;
1622: my $home='';
1623:
1624: if ($stuname) { $home=&homeserver($stuname,$domain); }
1625:
1626: if (!$symb) {
1627: unless ($symb=escape(&symbread())) { return ''; }
1628: } else {
1629: $symb=&escape(&symbclean($symb));
1630: }
1631: if (!$namespace) {
1632: unless ($namespace=$ENV{'request.course.id'}) {
1633: return '';
1634: }
1635: }
1636: if (!$domain) { $domain=$ENV{'user.domain'}; }
1637: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1638: if (!$home) { $home=$ENV{'user.home'}; }
1639: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1640:
1641: my %returnhash=();
1642: foreach (split(/\&/,$answer)) {
1643: my ($name,$value)=split(/\=/,$_);
1644: $returnhash{&unescape($name)}=&unescape($value);
1645: }
1646: my $version;
1647: for ($version=1;$version<=$returnhash{'version'};$version++) {
1648: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1649: $returnhash{$_}=$returnhash{$version.':'.$_};
1650: }
1651: }
1652: return %returnhash;
1653: }
1654:
1655: # ---------------------------------------------------------- Course Description
1656:
1657: sub coursedescription {
1658: my $courseid=shift;
1659: $courseid=~s/^\///;
1660: $courseid=~s/\_/\//g;
1661: my ($cdomain,$cnum)=split(/\//,$courseid);
1662: my $chome=&homeserver($cnum,$cdomain);
1663: my $normalid=$cdomain.'_'.$cnum;
1664: # need to always cache even if we get errors otherwise we keep
1665: # trying and trying and trying to get the course description.
1666: my %envhash=();
1667: my %returnhash=();
1668: $envhash{'course.'.$normalid.'.last_cache'}=time;
1669: if ($chome ne 'no_host') {
1670: %returnhash=&dump('environment',$cdomain,$cnum);
1671: if (!exists($returnhash{'con_lost'})) {
1672: $returnhash{'home'}= $chome;
1673: $returnhash{'domain'} = $cdomain;
1674: $returnhash{'num'} = $cnum;
1675: while (my ($name,$value) = each %returnhash) {
1676: $envhash{'course.'.$normalid.'.'.$name}=$value;
1677: }
1678: $returnhash{'url'}=&clutter($returnhash{'url'});
1679: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1680: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1681: $envhash{'course.'.$normalid.'.home'}=$chome;
1682: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1683: $envhash{'course.'.$normalid.'.num'}=$cnum;
1684: }
1685: }
1686: &appenv(%envhash);
1687: return %returnhash;
1688: }
1689:
1690: # -------------------------------------------------------- Get user privileges
1691:
1692: sub rolesinit {
1693: my ($domain,$username,$authhost)=@_;
1694: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1695: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1696: my %allroles=();
1697: my %thesepriv=();
1698: my $now=time;
1699: my $userroles="user.login.time=$now\n";
1700: my $thesestr;
1701:
1702: if ($rolesdump ne '') {
1703: foreach (split(/&/,$rolesdump)) {
1704: if ($_!~/^rolesdef\&/) {
1705: my ($area,$role)=split(/=/,$_);
1706: $area=~s/\_\w\w$//;
1707: my ($trole,$tend,$tstart)=split(/_/,$role);
1708: $userroles.='user.role.'.$trole.'.'.$area.'='.
1709: $tstart.'.'.$tend."\n";
1710: if ($tend!=0) {
1711: if ($tend<$now) {
1712: $trole='';
1713: }
1714: }
1715: if ($tstart!=0) {
1716: if ($tstart>$now) {
1717: $trole='';
1718: }
1719: }
1720: if (($area ne '') && ($trole ne '')) {
1721: my $spec=$trole.'.'.$area;
1722: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1723: if ($trole =~ /^cr\//) {
1724: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1725: my $homsvr=homeserver($rauthor,$rdomain);
1726: if ($hostname{$homsvr} ne '') {
1727: my $roledef=
1728: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1729: $homsvr);
1730: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1731: my ($syspriv,$dompriv,$coursepriv)=
1732: split(/\_/,unescape($roledef));
1733: if (defined($syspriv)) {
1734: $allroles{'cm./'}.=':'.$syspriv;
1735: $allroles{$spec.'./'}.=':'.$syspriv;
1736: }
1737: if ($tdomain ne '') {
1738: if (defined($dompriv)) {
1739: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1740: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1741: }
1742: if ($trest ne '') {
1743: if (defined($coursepriv)) {
1744: $allroles{'cm.'.$area}.=':'.$coursepriv;
1745: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1746: }
1747: }
1748: }
1749: }
1750: }
1751: } else {
1752: if (defined($pr{$trole.':s'})) {
1753: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1754: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1755: }
1756: if ($tdomain ne '') {
1757: if (defined($pr{$trole.':d'})) {
1758: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1759: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1760: }
1761: if ($trest ne '') {
1762: if (defined($pr{$trole.':c'})) {
1763: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1764: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1765: }
1766: }
1767: }
1768: }
1769: }
1770: }
1771: }
1772: my $adv=0;
1773: my $author=0;
1774: foreach (keys %allroles) {
1775: %thesepriv=();
1776: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1777: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1778: foreach (split(/:/,$allroles{$_})) {
1779: if ($_ ne '') {
1780: my ($privilege,$restrictions)=split(/&/,$_);
1781: if ($restrictions eq '') {
1782: $thesepriv{$privilege}='F';
1783: } else {
1784: if ($thesepriv{$privilege} ne 'F') {
1785: $thesepriv{$privilege}.=$restrictions;
1786: }
1787: }
1788: }
1789: }
1790: $thesestr='';
1791: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1792: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1793: }
1794: $userroles.='user.adv='.$adv."\n".
1795: 'user.author='.$author."\n";
1796: $ENV{'user.adv'}=$adv;
1797: }
1798: return $userroles;
1799: }
1800:
1801: # --------------------------------------------------------------- get interface
1802:
1803: sub get {
1804: my ($namespace,$storearr,$udomain,$uname)=@_;
1805: my $items='';
1806: foreach (@$storearr) {
1807: $items.=escape($_).'&';
1808: }
1809: $items=~s/\&$//;
1810: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1811: if (!$uname) { $uname=$ENV{'user.name'}; }
1812: my $uhome=&homeserver($uname,$udomain);
1813:
1814: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1815: my @pairs=split(/\&/,$rep);
1816: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
1817: return @pairs;
1818: }
1819: my %returnhash=();
1820: my $i=0;
1821: foreach (@$storearr) {
1822: $returnhash{$_}=unescape($pairs[$i]);
1823: $i++;
1824: }
1825: return %returnhash;
1826: }
1827:
1828: # --------------------------------------------------------------- del interface
1829:
1830: sub del {
1831: my ($namespace,$storearr,$udomain,$uname)=@_;
1832: my $items='';
1833: foreach (@$storearr) {
1834: $items.=escape($_).'&';
1835: }
1836: $items=~s/\&$//;
1837: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1838: if (!$uname) { $uname=$ENV{'user.name'}; }
1839: my $uhome=&homeserver($uname,$udomain);
1840:
1841: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1842: }
1843:
1844: # -------------------------------------------------------------- dump interface
1845:
1846: sub dump {
1847: my ($namespace,$udomain,$uname,$regexp)=@_;
1848: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1849: if (!$uname) { $uname=$ENV{'user.name'}; }
1850: my $uhome=&homeserver($uname,$udomain);
1851: if ($regexp) {
1852: $regexp=&escape($regexp);
1853: } else {
1854: $regexp='.';
1855: }
1856: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1857: my @pairs=split(/\&/,$rep);
1858: my %returnhash=();
1859: foreach (@pairs) {
1860: my ($key,$value)=split(/=/,$_);
1861: $returnhash{unescape($key)}=unescape($value);
1862: }
1863: return %returnhash;
1864: }
1865:
1866: # --------------------------------------------------------------- currentdump
1867: sub currentdump {
1868: my ($courseid,$sdom,$sname)=@_;
1869: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1870: $sdom = $ENV{'user.domain'} if (! defined($sdom));
1871: $sname = $ENV{'user.name'} if (! defined($sname));
1872: my $uhome = &homeserver($sname,$sdom);
1873: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
1874: return if ($rep =~ /^(error:|no_such_host)/);
1875: #
1876: my %returnhash=();
1877: #
1878: if ($rep eq "unknown_cmd") {
1879: # an old lond will not know currentdump
1880: # Do a dump and make it look like a currentdump
1881: my @tmp = &dump($courseid,$sdom,$sname,'.');
1882: return if ($tmp[0] =~ /^(error:|no_such_host)/);
1883: my %hash = @tmp;
1884: @tmp=();
1885: # Code ripped from lond, essentially. The only difference
1886: # here is the unescaping done by lonnet::dump(). Conceivably
1887: # we might run in to problems with parameter names =~ /^v\./
1888: while (my ($key,$value) = each(%hash)) {
1889: my ($v,$symb,$param) = split(/:/,$key);
1890: next if ($v eq 'version' || $symb eq 'keys');
1891: next if (exists($returnhash{$symb}) &&
1892: exists($returnhash{$symb}->{$param}) &&
1893: $returnhash{$symb}->{'v.'.$param} > $v);
1894: $returnhash{$symb}->{$param}=$value;
1895: $returnhash{$symb}->{'v.'.$param}=$v;
1896: }
1897: #
1898: # Remove all of the keys in the hashes which keep track of
1899: # the version of the parameter.
1900: while (my ($symb,$param_hash) = each(%returnhash)) {
1901: # use a foreach because we are going to delete from the hash.
1902: foreach my $key (keys(%$param_hash)) {
1903: delete($param_hash->{$key}) if ($key =~ /^v\./);
1904: }
1905: }
1906: } else {
1907: my @pairs=split(/\&/,$rep);
1908: foreach (@pairs) {
1909: my ($key,$value)=split(/=/,$_);
1910: my ($symb,$param) = split(/:/,$key);
1911: $returnhash{&unescape($symb)}->{&unescape($param)} =
1912: &unescape($value);
1913: }
1914: }
1915: return %returnhash;
1916: }
1917:
1918: # --------------------------------------------------------------- put interface
1919:
1920: sub put {
1921: my ($namespace,$storehash,$udomain,$uname)=@_;
1922: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1923: if (!$uname) { $uname=$ENV{'user.name'}; }
1924: my $uhome=&homeserver($uname,$udomain);
1925: my $items='';
1926: foreach (keys %$storehash) {
1927: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1928: }
1929: $items=~s/\&$//;
1930: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1931: }
1932:
1933: # ------------------------------------------------------ critical put interface
1934:
1935: sub cput {
1936: my ($namespace,$storehash,$udomain,$uname)=@_;
1937: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1938: if (!$uname) { $uname=$ENV{'user.name'}; }
1939: my $uhome=&homeserver($uname,$udomain);
1940: my $items='';
1941: foreach (keys %$storehash) {
1942: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1943: }
1944: $items=~s/\&$//;
1945: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1946: }
1947:
1948: # -------------------------------------------------------------- eget interface
1949:
1950: sub eget {
1951: my ($namespace,$storearr,$udomain,$uname)=@_;
1952: my $items='';
1953: foreach (@$storearr) {
1954: $items.=escape($_).'&';
1955: }
1956: $items=~s/\&$//;
1957: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1958: if (!$uname) { $uname=$ENV{'user.name'}; }
1959: my $uhome=&homeserver($uname,$udomain);
1960: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1961: my @pairs=split(/\&/,$rep);
1962: my %returnhash=();
1963: my $i=0;
1964: foreach (@$storearr) {
1965: $returnhash{$_}=unescape($pairs[$i]);
1966: $i++;
1967: }
1968: return %returnhash;
1969: }
1970:
1971: # ---------------------------------------------- Custom access rule evaluation
1972:
1973: sub customaccess {
1974: my ($priv,$uri)=@_;
1975: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
1976: $urealm=~s/^\W//;
1977: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
1978: my $access=0;
1979: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
1980: my ($effect,$realm,$role)=split(/\:/,$_);
1981: if ($role) {
1982: if ($role ne $urole) { next; }
1983: }
1984: foreach (split(/\s*\,\s*/,$realm)) {
1985: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
1986: if ($tdom) {
1987: if ($tdom ne $udom) { next; }
1988: }
1989: if ($tcrs) {
1990: if ($tcrs ne $ucrs) { next; }
1991: }
1992: if ($tsec) {
1993: if ($tsec ne $usec) { next; }
1994: }
1995: $access=($effect eq 'allow');
1996: last;
1997: }
1998: }
1999: return $access;
2000: }
2001:
2002: # ------------------------------------------------- Check for a user privilege
2003:
2004: sub allowed {
2005: my ($priv,$uri)=@_;
2006:
2007: my $orguri=$uri;
2008: $uri=&declutter($uri);
2009:
2010: # Free bre access to adm and meta resources
2011:
2012: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2013: return 'F';
2014: }
2015:
2016: # Free bre to public access
2017:
2018: if ($priv eq 'bre') {
2019: my $copyright=&metadata($uri,'copyright');
2020: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2021: return 'F';
2022: }
2023: if ($copyright eq 'priv') {
2024: $uri=~/([^\/]+)\/([^\/]+)\//;
2025: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2026: return '';
2027: }
2028: }
2029: if ($copyright eq 'domain') {
2030: $uri=~/([^\/]+)\/([^\/]+)\//;
2031: unless (($ENV{'user.domain'} eq $1) ||
2032: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2033: return '';
2034: }
2035: }
2036: if ($ENV{'request.role'}=~ /li\.\//) {
2037: # Library role, so allow browsing of resources in this domain.
2038: return 'F';
2039: }
2040: if ($copyright eq 'custom') {
2041: unless (&customaccess($priv,$uri)) { return ''; }
2042: }
2043: }
2044: # Domain coordinator is trying to create a course
2045: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2046: # uri is the requested domain in this case.
2047: # comparison to 'request.role.domain' shows if the user has selected
2048: # a role of dc for the domain in question.
2049: return 'F' if ($uri eq $ENV{'request.role.domain'});
2050: }
2051:
2052: my $thisallowed='';
2053: my $statecond=0;
2054: my $courseprivid='';
2055:
2056: # Course
2057:
2058: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
2059: $thisallowed.=$1;
2060: }
2061:
2062: # Domain
2063:
2064: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2065: =~/$priv\&([^\:]*)/) {
2066: $thisallowed.=$1;
2067: }
2068:
2069: # Course: uri itself is a course
2070: my $courseuri=$uri;
2071: $courseuri=~s/\_(\d)/\/$1/;
2072: $courseuri=~s/^([^\/])/\/$1/;
2073:
2074: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2075: =~/$priv\&([^\:]*)/) {
2076: $thisallowed.=$1;
2077: }
2078:
2079: # URI is an uploaded document for this course
2080:
2081: if (($priv eq 'bre') &&
2082: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2083: return 'F';
2084: }
2085: # Full access at system, domain or course-wide level? Exit.
2086:
2087: if ($thisallowed=~/F/) {
2088: return 'F';
2089: }
2090:
2091: # If this is generating or modifying users, exit with special codes
2092:
2093: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
2094: return $thisallowed;
2095: }
2096: #
2097: # Gathered so far: system, domain and course wide privileges
2098: #
2099: # Course: See if uri or referer is an individual resource that is part of
2100: # the course
2101:
2102: if ($ENV{'request.course.id'}) {
2103:
2104: $courseprivid=$ENV{'request.course.id'};
2105: if ($ENV{'request.course.sec'}) {
2106: $courseprivid.='/'.$ENV{'request.course.sec'};
2107: }
2108: $courseprivid=~s/\_/\//;
2109: my $checkreferer=1;
2110: my ($match,$cond)=&is_on_map($uri);
2111: if ($match) {
2112: $statecond=$cond;
2113: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2114: =~/$priv\&([^\:]*)/) {
2115: $thisallowed.=$1;
2116: $checkreferer=0;
2117: }
2118: }
2119:
2120: if ($checkreferer) {
2121: my $refuri=$ENV{'httpref.'.$orguri};
2122: unless ($refuri) {
2123: foreach (keys %ENV) {
2124: if ($_=~/^httpref\..*\*/) {
2125: my $pattern=$_;
2126: $pattern=~s/^httpref\.\/res\///;
2127: $pattern=~s/\*/\[\^\/\]\+/g;
2128: $pattern=~s/\//\\\//g;
2129: if ($orguri=~/$pattern/) {
2130: $refuri=$ENV{$_};
2131: }
2132: }
2133: }
2134: }
2135:
2136: if ($refuri) {
2137: $refuri=&declutter($refuri);
2138: my ($match,$cond)=&is_on_map($refuri);
2139: if ($match) {
2140: my $refstatecond=$cond;
2141: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2142: =~/$priv\&([^\:]*)/) {
2143: $thisallowed.=$1;
2144: $uri=$refuri;
2145: $statecond=$refstatecond;
2146: }
2147: }
2148: }
2149: }
2150: }
2151:
2152: #
2153: # Gathered now: all privileges that could apply, and condition number
2154: #
2155: #
2156: # Full or no access?
2157: #
2158:
2159: if ($thisallowed=~/F/) {
2160: return 'F';
2161: }
2162:
2163: unless ($thisallowed) {
2164: return '';
2165: }
2166:
2167: # Restrictions exist, deal with them
2168: #
2169: # C:according to course preferences
2170: # R:according to resource settings
2171: # L:unless locked
2172: # X:according to user session state
2173: #
2174:
2175: # Possibly locked functionality, check all courses
2176: # Locks might take effect only after 10 minutes cache expiration for other
2177: # courses, and 2 minutes for current course
2178:
2179: my $envkey;
2180: if ($thisallowed=~/L/) {
2181: foreach $envkey (keys %ENV) {
2182: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2183: my $courseid=$2;
2184: my $roleid=$1.'.'.$2;
2185: $courseid=~s/^\///;
2186: my $expiretime=600;
2187: if ($ENV{'request.role'} eq $roleid) {
2188: $expiretime=120;
2189: }
2190: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2191: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2192: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2193: &coursedescription($courseid);
2194: }
2195: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2196: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2197: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2198: &log($ENV{'user.domain'},$ENV{'user.name'},
2199: $ENV{'user.home'},
2200: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2201: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2202: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2203: return '';
2204: }
2205: }
2206: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2207: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2208: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2209: &log($ENV{'user.domain'},$ENV{'user.name'},
2210: $ENV{'user.home'},
2211: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2212: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2213: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2214: return '';
2215: }
2216: }
2217: }
2218: }
2219: }
2220:
2221: #
2222: # Rest of the restrictions depend on selected course
2223: #
2224:
2225: unless ($ENV{'request.course.id'}) {
2226: return '1';
2227: }
2228:
2229: #
2230: # Now user is definitely in a course
2231: #
2232:
2233:
2234: # Course preferences
2235:
2236: if ($thisallowed=~/C/) {
2237: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2238: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2239: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2240: =~/$rolecode/) {
2241: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2242: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2243: $ENV{'request.course.id'});
2244: return '';
2245: }
2246:
2247: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2248: =~/$unamedom/) {
2249: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2250: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2251: $ENV{'request.course.id'});
2252: return '';
2253: }
2254: }
2255:
2256: # Resource preferences
2257:
2258: if ($thisallowed=~/R/) {
2259: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2260: if (&metadata($uri,'roledeny')=~/$rolecode/) {
2261: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2262: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2263: return '';
2264: }
2265: }
2266:
2267: # Restricted by state or randomout?
2268:
2269: if ($thisallowed=~/X/) {
2270: if ($ENV{'acc.randomout'}) {
2271: my $symb=&symbread($uri,1);
2272: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2273: return '';
2274: }
2275: }
2276: if (&condval($statecond)) {
2277: return '2';
2278: } else {
2279: return '';
2280: }
2281: }
2282:
2283: return 'F';
2284: }
2285:
2286: # --------------------------------------------------- Is a resource on the map?
2287:
2288: sub is_on_map {
2289: my $uri=&declutter(shift);
2290: my @uriparts=split(/\//,$uri);
2291: my $filename=$uriparts[$#uriparts];
2292: my $pathname=$uri;
2293: $pathname=~s|/\Q$filename\E$||;
2294: $pathname=~s/^adm\/wrapper\///;
2295: #Trying to find the conditional for the file
2296: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2297: /\&\Q$filename\E\:([\d\|]+)\&/);
2298: if ($match) {
2299: return (1,$1);
2300: } else {
2301: return (0,0);
2302: }
2303: }
2304:
2305: # ----------------------------------------------------------------- Define Role
2306:
2307: sub definerole {
2308: if (allowed('mcr','/')) {
2309: my ($rolename,$sysrole,$domrole,$courole)=@_;
2310: foreach (split('/',$sysrole)) {
2311: my ($crole,$cqual)=split(/\&/,$_);
2312: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2313: if ($pr{'cr:s'}=~/$crole\&/) {
2314: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2315: return "refused:s:$crole&$cqual";
2316: }
2317: }
2318: }
2319: foreach (split('/',$domrole)) {
2320: my ($crole,$cqual)=split(/\&/,$_);
2321: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2322: if ($pr{'cr:d'}=~/$crole\&/) {
2323: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2324: return "refused:d:$crole&$cqual";
2325: }
2326: }
2327: }
2328: foreach (split('/',$courole)) {
2329: my ($crole,$cqual)=split(/\&/,$_);
2330: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2331: if ($pr{'cr:c'}=~/$crole\&/) {
2332: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2333: return "refused:c:$crole&$cqual";
2334: }
2335: }
2336: }
2337: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2338: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2339: "rolesdef_$rolename=".
2340: escape($sysrole.'_'.$domrole.'_'.$courole);
2341: return reply($command,$ENV{'user.home'});
2342: } else {
2343: return 'refused';
2344: }
2345: }
2346:
2347: # ---------------- Make a metadata query against the network of library servers
2348:
2349: sub metadata_query {
2350: my ($query,$custom,$customshow,$server_array)=@_;
2351: my %rhash;
2352: my @server_list = (defined($server_array) ? @$server_array
2353: : keys(%libserv) );
2354: for my $server (@server_list) {
2355: unless ($custom or $customshow) {
2356: my $reply=&reply("querysend:".&escape($query),$server);
2357: $rhash{$server}=$reply;
2358: }
2359: else {
2360: my $reply=&reply("querysend:".&escape($query).':'.
2361: &escape($custom).':'.&escape($customshow),
2362: $server);
2363: $rhash{$server}=$reply;
2364: }
2365: }
2366: return \%rhash;
2367: }
2368:
2369: # ----------------------------------------- Send log queries and wait for reply
2370:
2371: sub log_query {
2372: my ($uname,$udom,$query,%filters)=@_;
2373: my $uhome=&homeserver($uname,$udom);
2374: if ($uhome eq 'no_host') { return 'error: no_host'; }
2375: my $uhost=$hostname{$uhome};
2376: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2377: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2378: $uhome);
2379: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2380: return get_query_reply($queryid);
2381: }
2382:
2383: sub get_query_reply {
2384: my $queryid=shift;
2385: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2386: my $reply='';
2387: for (1..100) {
2388: sleep 2;
2389: if (-e $replyfile.'.end') {
2390: if (my $fh=Apache::File->new($replyfile)) {
2391: $reply.=<$fh>;
2392: $fh->close;
2393: } else { return 'error: reply_file_error'; }
2394: return &unescape($reply);
2395: }
2396: }
2397: return 'timeout:'.$queryid;
2398: }
2399:
2400: sub courselog_query {
2401: #
2402: # possible filters:
2403: # url: url or symb
2404: # username
2405: # domain
2406: # action: view, submit, grade
2407: # start: timestamp
2408: # end: timestamp
2409: #
2410: my (%filters)=@_;
2411: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2412: if ($filters{'url'}) {
2413: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2414: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2415: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2416: }
2417: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2418: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2419: return &log_query($cname,$cdom,'courselog',%filters);
2420: }
2421:
2422: sub userlog_query {
2423: my ($uname,$udom,%filters)=@_;
2424: return &log_query($uname,$udom,'userlog',%filters);
2425: }
2426:
2427: # ------------------------------------------------------------------ Plain Text
2428:
2429: sub plaintext {
2430: my $short=shift;
2431: return $prp{$short};
2432: }
2433:
2434: # ----------------------------------------------------------------- Assign Role
2435:
2436: sub assignrole {
2437: my ($udom,$uname,$url,$role,$end,$start)=@_;
2438: my $mrole;
2439: if ($role =~ /^cr\//) {
2440: unless (&allowed('ccr',$url)) {
2441: &logthis('Refused custom assignrole: '.
2442: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2443: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2444: return 'refused';
2445: }
2446: $mrole='cr';
2447: } else {
2448: my $cwosec=$url;
2449: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2450: unless (&allowed('c'.$role,$cwosec)) {
2451: &logthis('Refused assignrole: '.
2452: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2453: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2454: return 'refused';
2455: }
2456: $mrole=$role;
2457: }
2458: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2459: "$udom:$uname:$url".'_'."$mrole=$role";
2460: if ($end) { $command.='_'.$end; }
2461: if ($start) {
2462: if ($end) {
2463: $command.='_'.$start;
2464: } else {
2465: $command.='_0_'.$start;
2466: }
2467: }
2468: return &reply($command,&homeserver($uname,$udom));
2469: }
2470:
2471: # -------------------------------------------------- Modify user authentication
2472: # Overrides without validation
2473:
2474: sub modifyuserauth {
2475: my ($udom,$uname,$umode,$upass)=@_;
2476: my $uhome=&homeserver($uname,$udom);
2477: unless (&allowed('mau',$udom)) { return 'refused'; }
2478: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2479: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2480: ' in domain '.$ENV{'request.role.domain'});
2481: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2482: &escape($upass),$uhome);
2483: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2484: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2485: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2486: &log($udom,,$uname,$uhome,
2487: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2488: $ENV{'user.name'}.', '.$umode.
2489: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2490: unless ($reply eq 'ok') {
2491: &logthis('Authentication mode error: '.$reply);
2492: return 'error: '.$reply;
2493: }
2494: return 'ok';
2495: }
2496:
2497: # --------------------------------------------------------------- Modify a user
2498:
2499: sub modifyuser {
2500: my ($udom, $uname, $uid,
2501: $umode, $upass, $first,
2502: $middle, $last, $gene,
2503: $forceid, $desiredhome)=@_;
2504: $udom=~s/\W//g;
2505: $uname=~s/\W//g;
2506: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2507: $umode.', '.$first.', '.$middle.', '.
2508: $last.', '.$gene.'(forceid: '.$forceid.')'.
2509: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2510: ' desiredhome not specified').
2511: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2512: ' in domain '.$ENV{'request.role.domain'});
2513: my $uhome=&homeserver($uname,$udom,'true');
2514: # ----------------------------------------------------------------- Create User
2515: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
2516: my $unhome='';
2517: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2518: $unhome = $desiredhome;
2519: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2520: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2521: } else { # load balancing routine for determining $unhome
2522: my $tryserver;
2523: my $loadm=10000000;
2524: foreach $tryserver (keys %libserv) {
2525: if ($hostdom{$tryserver} eq $udom) {
2526: my $answer=reply('load',$tryserver);
2527: if (($answer=~/\d+/) && ($answer<$loadm)) {
2528: $loadm=$answer;
2529: $unhome=$tryserver;
2530: }
2531: }
2532: }
2533: }
2534: if (($unhome eq '') || ($unhome eq 'no_host')) {
2535: return 'error: unable to find a home server for '.$uname.
2536: ' in domain '.$udom;
2537: }
2538: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2539: &escape($upass),$unhome);
2540: unless ($reply eq 'ok') {
2541: return 'error: '.$reply;
2542: }
2543: $uhome=&homeserver($uname,$udom,'true');
2544: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2545: return 'error: verify home';
2546: }
2547: } # End of creation of new user
2548: # ---------------------------------------------------------------------- Add ID
2549: if ($uid) {
2550: $uid=~tr/A-Z/a-z/;
2551: my %uidhash=&idrget($udom,$uname);
2552: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2553: && (!$forceid)) {
2554: unless ($uid eq $uidhash{$uname}) {
2555: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2556: }
2557: } else {
2558: &idput($udom,($uname => $uid));
2559: }
2560: }
2561: # -------------------------------------------------------------- Add names, etc
2562: my @tmp=&get('environment',
2563: ['firstname','middlename','lastname','generation'],
2564: $udom,$uname);
2565: my %names;
2566: if ($tmp[0] =~ m/^error:.*/) {
2567: %names=();
2568: } else {
2569: %names = @tmp;
2570: }
2571: if ($first) { $names{'firstname'} = $first; }
2572: if ($middle) { $names{'middlename'} = $middle; }
2573: if ($last) { $names{'lastname'} = $last; }
2574: if ($gene) { $names{'generation'} = $gene; }
2575: my $reply = &put('environment', \%names, $udom,$uname);
2576: if ($reply ne 'ok') { return 'error: '.$reply; }
2577: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2578: $umode.', '.$first.', '.$middle.', '.
2579: $last.', '.$gene.' by '.
2580: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2581: return 'ok';
2582: }
2583:
2584: # -------------------------------------------------------------- Modify student
2585:
2586: sub modifystudent {
2587: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2588: $end,$start,$forceid,$desiredhome)=@_;
2589: my $cid='';
2590: unless ($cid=$ENV{'request.course.id'}) {
2591: return 'not_in_class';
2592: }
2593: # --------------------------------------------------------------- Make the user
2594: my $reply=&modifyuser
2595: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2596: $desiredhome);
2597: unless ($reply eq 'ok') { return $reply; }
2598: # This will cause &modify_student_enrollment to get the uid from the
2599: # students environment
2600: $uid = undef if (!$forceid);
2601: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
2602: $last,$gene,$usec,$end,$start);
2603: return $reply;
2604: }
2605:
2606: sub modify_student_enrollment {
2607: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
2608: # Get the course id from the environment
2609: my $cid='';
2610: unless ($cid=$ENV{'request.course.id'}) {
2611: return 'not_in_class';
2612: }
2613: # Make sure the user exists
2614: my $uhome=&homeserver($uname,$udom);
2615: if (($uhome eq '') || ($uhome eq 'no_host')) {
2616: return 'error: no such user';
2617: }
2618: #
2619: # Get student data if we were not given enough information
2620: if (!defined($first) || $first eq '' ||
2621: !defined($last) || $last eq '' ||
2622: !defined($uid) || $uid eq '' ||
2623: !defined($middle) || $middle eq '' ||
2624: !defined($gene) || $gene eq '') {
2625: # They did not supply us with enough data to enroll the student, so
2626: # we need to pick up more information.
2627: my %tmp = &get('environment',
2628: ['firstname','middlename','lastname', 'generation','id']
2629: ,$udom,$uname);
2630:
2631: foreach (keys(%tmp)) {
2632: &logthis("key $_ = ".$tmp{$_});
2633: }
2634: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
2635: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
2636: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
2637: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
2638: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
2639: }
2640: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
2641: $first,$middle);
2642: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2643: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2644: &escape($uname.':'.$udom).'='.
2645: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
2646: $ENV{'course.'.$cid.'.home'});
2647: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2648: return 'error: '.$reply;
2649: }
2650: # Add student role to user
2651: my $uurl='/'.$cid;
2652: $uurl=~s/\_/\//g;
2653: if ($usec) {
2654: $uurl.='/'.$usec;
2655: }
2656: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2657: }
2658:
2659: # ------------------------------------------------- Write to course preferences
2660:
2661: sub writecoursepref {
2662: my ($courseid,%prefs)=@_;
2663: $courseid=~s/^\///;
2664: $courseid=~s/\_/\//g;
2665: my ($cdomain,$cnum)=split(/\//,$courseid);
2666: my $chome=homeserver($cnum,$cdomain);
2667: if (($chome eq '') || ($chome eq 'no_host')) {
2668: return 'error: no such course';
2669: }
2670: my $cstring='';
2671: foreach (keys %prefs) {
2672: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2673: }
2674: $cstring=~s/\&$//;
2675: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2676: }
2677:
2678: # ---------------------------------------------------------- Make/modify course
2679:
2680: sub createcourse {
2681: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
2682: $url=&declutter($url);
2683: my $cid='';
2684: unless (&allowed('ccc',$udom)) {
2685: return 'refused';
2686: }
2687: # ------------------------------------------------------------------- Create ID
2688: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2689: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2690: # ----------------------------------------------- Make sure that does not exist
2691: my $uhome=&homeserver($uname,$udom,'true');
2692: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2693: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2694: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2695: $uhome=&homeserver($uname,$udom,'true');
2696: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2697: return 'error: unable to generate unique course-ID';
2698: }
2699: }
2700: # ------------------------------------------------ Check supplied server name
2701: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
2702: if (! exists($libserv{$course_server})) {
2703: return 'error:bad server name '.$course_server;
2704: }
2705: # ------------------------------------------------------------- Make the course
2706: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2707: $course_server);
2708: unless ($reply eq 'ok') { return 'error: '.$reply; }
2709: $uhome=&homeserver($uname,$udom,'true');
2710: if (($uhome eq '') || ($uhome eq 'no_host')) {
2711: return 'error: no such course';
2712: }
2713: # ----------------------------------------------------------------- Course made
2714: my $topurl=$url;
2715: unless ($nonstandard) {
2716: # ------------------------------------------ For standard courses, make top url
2717: my $mapurl=&clutter($url);
2718: if ($mapurl eq '/res/') { $mapurl=''; }
2719: $ENV{'form.initmap'}=(<<ENDINITMAP);
2720: <map>
2721: <resource id="1" type="start"></resource>
2722: <resource id="2" src="$mapurl"></resource>
2723: <resource id="3" type="finish"></resource>
2724: <link index="1" from="1" to="2"></link>
2725: <link index="2" from="2" to="3"></link>
2726: </map>
2727: ENDINITMAP
2728: $topurl=&declutter(
2729: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
2730: );
2731: }
2732: # ----------------------------------------------------------- Write preferences
2733: &writecoursepref($udom.'_'.$uname,
2734: ('description' => $description,
2735: 'url' => $topurl));
2736: return '/'.$udom.'/'.$uname;
2737: }
2738:
2739: # ---------------------------------------------------------- Assign Custom Role
2740:
2741: sub assigncustomrole {
2742: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2743: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2744: $end,$start);
2745: }
2746:
2747: # ----------------------------------------------------------------- Revoke Role
2748:
2749: sub revokerole {
2750: my ($udom,$uname,$url,$role)=@_;
2751: my $now=time;
2752: return &assignrole($udom,$uname,$url,$role,$now);
2753: }
2754:
2755: # ---------------------------------------------------------- Revoke Custom Role
2756:
2757: sub revokecustomrole {
2758: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2759: my $now=time;
2760: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2761: }
2762:
2763: # ------------------------------------------------------------ Directory lister
2764:
2765: sub dirlist {
2766: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2767:
2768: $uri=~s/^\///;
2769: $uri=~s/\/$//;
2770: my ($udom, $uname);
2771: (undef,$udom,$uname)=split(/\//,$uri);
2772: if(defined($userdomain)) {
2773: $udom = $userdomain;
2774: }
2775: if(defined($username)) {
2776: $uname = $username;
2777: }
2778:
2779: my $dirRoot = $perlvar{'lonDocRoot'};
2780: if(defined($alternateDirectoryRoot)) {
2781: $dirRoot = $alternateDirectoryRoot;
2782: $dirRoot =~ s/\/$//;
2783: }
2784:
2785: if($udom) {
2786: if($uname) {
2787: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2788: homeserver($uname,$udom));
2789: return split(/:/,$listing);
2790: } elsif(!defined($alternateDirectoryRoot)) {
2791: my $tryserver;
2792: my %allusers=();
2793: foreach $tryserver (keys %libserv) {
2794: if($hostdom{$tryserver} eq $udom) {
2795: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2796: $udom, $tryserver);
2797: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2798: && ($listing ne 'con_lost')) {
2799: foreach (split(/:/,$listing)) {
2800: my ($entry,@stat)=split(/&/,$_);
2801: $allusers{$entry}=1;
2802: }
2803: }
2804: }
2805: }
2806: my $alluserstr='';
2807: foreach (sort keys %allusers) {
2808: $alluserstr.=$_.'&user:';
2809: }
2810: $alluserstr=~s/:$//;
2811: return split(/:/,$alluserstr);
2812: } else {
2813: my @emptyResults = ();
2814: push(@emptyResults, 'missing user name');
2815: return split(':',@emptyResults);
2816: }
2817: } elsif(!defined($alternateDirectoryRoot)) {
2818: my $tryserver;
2819: my %alldom=();
2820: foreach $tryserver (keys %libserv) {
2821: $alldom{$hostdom{$tryserver}}=1;
2822: }
2823: my $alldomstr='';
2824: foreach (sort keys %alldom) {
2825: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2826: }
2827: $alldomstr=~s/:$//;
2828: return split(/:/,$alldomstr);
2829: } else {
2830: my @emptyResults = ();
2831: push(@emptyResults, 'missing domain');
2832: return split(':',@emptyResults);
2833: }
2834: }
2835:
2836: # --------------------------------------------- GetFileTimestamp
2837: # This function utilizes dirlist and returns the date stamp for
2838: # when it was last modified. It will also return an error of -1
2839: # if an error occurs
2840:
2841: sub GetFileTimestamp {
2842: my ($studentDomain,$studentName,$filename,$root)=@_;
2843: $studentDomain=~s/\W//g;
2844: $studentName=~s/\W//g;
2845: my $subdir=$studentName.'__';
2846: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
2847: my $proname="$studentDomain/$subdir/$studentName";
2848: $proname .= '/'.$filename;
2849: my @dir = &Apache::lonnet::dirlist($proname, $studentDomain, $studentName,
2850: $root);
2851: my $fileStat = $dir[0];
2852: my @stats = split('&', $fileStat);
2853: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
2854: return $stats[9];
2855: } else {
2856: return -1;
2857: }
2858: }
2859:
2860: # -------------------------------------------------------- Value of a Condition
2861:
2862: sub directcondval {
2863: my $number=shift;
2864: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2865: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2866: } else {
2867: return 2;
2868: }
2869: }
2870:
2871: sub condval {
2872: my $condidx=shift;
2873: my $result=0;
2874: my $allpathcond='';
2875: foreach (split(/\|/,$condidx)) {
2876: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2877: $allpathcond.=
2878: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2879: }
2880: }
2881: $allpathcond=~s/\|$//;
2882: if ($ENV{'request.course.id'}) {
2883: if ($allpathcond) {
2884: my $operand='|';
2885: my @stack;
2886: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
2887: if ($_ eq '(') {
2888: push @stack,($operand,$result)
2889: } elsif ($_ eq ')') {
2890: my $before=pop @stack;
2891: if (pop @stack eq '&') {
2892: $result=$result>$before?$before:$result;
2893: } else {
2894: $result=$result>$before?$result:$before;
2895: }
2896: } elsif (($_ eq '&') || ($_ eq '|')) {
2897: $operand=$_;
2898: } else {
2899: my $new=directcondval($_);
2900: if ($operand eq '&') {
2901: $result=$result>$new?$new:$result;
2902: } else {
2903: $result=$result>$new?$result:$new;
2904: }
2905: }
2906: }
2907: }
2908: }
2909: return $result;
2910: }
2911:
2912: # ---------------------------------------------------- Devalidate courseresdata
2913:
2914: sub devalidatecourseresdata {
2915: my ($coursenum,$coursedomain)=@_;
2916: my $hashid=$coursenum.':'.$coursedomain;
2917: delete $courseresdatacache{$hashid.'.time'};
2918: }
2919:
2920: # --------------------------------------------------- Course Resourcedata Query
2921:
2922: sub courseresdata {
2923: my ($coursenum,$coursedomain,@which)=@_;
2924: my $coursehom=&homeserver($coursenum,$coursedomain);
2925: my $hashid=$coursenum.':'.$coursedomain;
2926: my $dodump=0;
2927: if (!defined($courseresdatacache{$hashid.'.time'})) {
2928: $dodump=1;
2929: } else {
2930: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
2931: }
2932: if ($dodump) {
2933: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
2934: my ($tmp) = keys(%dumpreply);
2935: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
2936: $courseresdatacache{$hashid.'.time'}=time;
2937: $courseresdatacache{$hashid}=\%dumpreply;
2938: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
2939: return $tmp;
2940: }
2941: }
2942: foreach my $item (@which) {
2943: if (defined($courseresdatacache{$hashid}->{$item})) {
2944: return $courseresdatacache{$hashid}->{$item};
2945: }
2946: }
2947: return undef;
2948: }
2949:
2950: # --------------------------------------------------------- Value of a Variable
2951:
2952: sub EXT {
2953: my ($varname,$symbparm,$udom,$uname,)=@_;
2954:
2955: unless ($varname) { return ''; }
2956: #get real user name/domain, courseid and symb
2957: my $courseid;
2958: if (!($uname && $udom)) {
2959: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2960: if (!$symbparm) { $symbparm=$cursymb; }
2961: } else {
2962: $courseid=$ENV{'request.course.id'};
2963: }
2964: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2965: my $rest;
2966: if (defined($therest[0])) {
2967: $rest=join('.',@therest);
2968: } else {
2969: $rest='';
2970: }
2971:
2972: my $qualifierrest=$qualifier;
2973: if ($rest) { $qualifierrest.='.'.$rest; }
2974: my $spacequalifierrest=$space;
2975: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2976: if ($realm eq 'user') {
2977: # --------------------------------------------------------------- user.resource
2978: if ($space eq 'resource') {
2979: if (defined($Apache::lonhomework::parsing_a_problem)) {
2980: return $Apache::lonhomework::history{$qualifierrest};
2981: } else {
2982: my %restored=&restore($symbparm,$courseid,$udom,$uname);
2983: return $restored{$qualifierrest};
2984: }
2985: # ----------------------------------------------------------------- user.access
2986: } elsif ($space eq 'access') {
2987: # FIXME - not supporting calls for a specific user
2988: return &allowed($qualifier,$rest);
2989: # ------------------------------------------ user.preferences, user.environment
2990: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2991: if (($uname eq $ENV{'user.name'}) &&
2992: ($udom eq $ENV{'user.domain'})) {
2993: return $ENV{join('.',('environment',$qualifierrest))};
2994: } else {
2995: my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
2996: return $returnhash{$qualifierrest};
2997: }
2998: # ----------------------------------------------------------------- user.course
2999: } elsif ($space eq 'course') {
3000: # FIXME - not supporting calls for a specific user
3001: return $ENV{join('.',('request.course',$qualifier))};
3002: # ------------------------------------------------------------------- user.role
3003: } elsif ($space eq 'role') {
3004: # FIXME - not supporting calls for a specific user
3005: my ($role,$where)=split(/\./,$ENV{'request.role'});
3006: if ($qualifier eq 'value') {
3007: return $role;
3008: } elsif ($qualifier eq 'extent') {
3009: return $where;
3010: }
3011: # ----------------------------------------------------------------- user.domain
3012: } elsif ($space eq 'domain') {
3013: return $udom;
3014: # ------------------------------------------------------------------- user.name
3015: } elsif ($space eq 'name') {
3016: return $uname;
3017: # ---------------------------------------------------- Any other user namespace
3018: } else {
3019: my %reply=&get($space,[$qualifierrest],$udom,$uname);
3020: return $reply{$qualifierrest};
3021: }
3022: } elsif ($realm eq 'query') {
3023: # ---------------------------------------------- pull stuff out of query string
3024: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
3025: return $ENV{'form.'.$space};
3026: } elsif ($realm eq 'request') {
3027: # ------------------------------------------------------------- request.browser
3028: if ($space eq 'browser') {
3029: return $ENV{'browser.'.$qualifier};
3030: # ------------------------------------------------------------ request.filename
3031: } else {
3032: return $ENV{'request.'.$spacequalifierrest};
3033: }
3034: } elsif ($realm eq 'course') {
3035: # ---------------------------------------------------------- course.description
3036: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
3037: } elsif ($realm eq 'resource') {
3038:
3039: if ($courseid eq $ENV{'request.course.id'}) {
3040:
3041: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
3042:
3043: # ----------------------------------------------------- Cascading lookup scheme
3044: if (!$symbparm) { $symbparm=&symbread(); }
3045: my $symbp=$symbparm;
3046: my $mapp=(split(/\_\_\_/,$symbp))[0];
3047:
3048: my $symbparm=$symbp.'.'.$spacequalifierrest;
3049: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3050:
3051: my $section;
3052: if (($ENV{'user.name'} eq $uname) &&
3053: ($ENV{'user.domain'} eq $udom)) {
3054: $section=$ENV{'request.course.sec'};
3055: } else {
3056: $section=&usection($udom,$uname,$courseid);
3057: }
3058:
3059: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3060: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3061: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3062:
3063: my $courselevel=$courseid.'.'.$spacequalifierrest;
3064: my $courselevelr=$courseid.'.'.$symbparm;
3065: my $courselevelm=$courseid.'.'.$mapparm;
3066:
3067: # ----------------------------------------------------------- first, check user
3068: #most student don't have any data set, check if there is some data
3069: #every thirty minutes
3070: if (!
3071: (exists($ENV{'cache.studentresdata'})
3072: && (($ENV{'cache.studentresdata'}+1800) > time))) {
3073: my %resourcedata=&get('resourcedata',
3074: [$courselevelr,$courselevelm,$courselevel],
3075: $udom,$uname);
3076: my ($tmp)=keys(%resourcedata);
3077: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
3078: if ($resourcedata{$courselevelr}) {
3079: return $resourcedata{$courselevelr}; }
3080: if ($resourcedata{$courselevelm}) {
3081: return $resourcedata{$courselevelm}; }
3082: if ($resourcedata{$courselevel}) {
3083: return $resourcedata{$courselevel}; }
3084: } else {
3085: if ($tmp!~/No such file/) {
3086: &logthis("<font color=blue>WARNING:".
3087: " Trying to get resource data for ".
3088: $uname." at ".$udom.": ".
3089: $tmp."</font>");
3090: } elsif ($tmp=~/error:No such file/) {
3091: $ENV{'cache.studentresdata'}=time;
3092: &appenv(('cache.studentresdata'=>
3093: $ENV{'cache.studentresdata'}));
3094: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3095: return $tmp;
3096: }
3097: }
3098: }
3099:
3100: # -------------------------------------------------------- second, check course
3101:
3102: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3103: $ENV{'course.'.$courseid.'.domain'},
3104: ($seclevelr,$seclevelm,$seclevel,
3105: $courselevelr,$courselevelm,
3106: $courselevel));
3107: if (defined($coursereply)) { return $coursereply; }
3108:
3109: # ------------------------------------------------------ third, check map parms
3110: my %parmhash=();
3111: my $thisparm='';
3112: if (tie(%parmhash,'GDBM_File',
3113: $ENV{'request.course.fn'}.'_parms.db',
3114: &GDBM_READER(),0640)) {
3115: $thisparm=$parmhash{$symbparm};
3116: untie(%parmhash);
3117: }
3118: if ($thisparm) { return $thisparm; }
3119: }
3120: # --------------------------------------------- last, look in resource metadata
3121:
3122: $spacequalifierrest=~s/\./\_/;
3123: my $filename;
3124: if (!$symbparm) { $symbparm=&symbread(); }
3125: if ($symbparm) {
3126: $filename=(split(/\_\_\_/,$symbparm))[2];
3127: } else {
3128: $filename=$ENV{'request.filename'};
3129: }
3130: my $metadata=&metadata($filename,$spacequalifierrest);
3131: if (defined($metadata)) { return $metadata; }
3132: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
3133: if (defined($metadata)) { return $metadata; }
3134:
3135: # ------------------------------------------------------------------ Cascade up
3136: unless ($space eq '0') {
3137: my @parts=split(/_/,$space);
3138: my $id=pop(@parts);
3139: my $part=join('_',@parts);
3140: if ($part eq '') { $part='0'; }
3141: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
3142: $symbparm,$udom,$uname);
3143: if (defined($partgeneral)) { return $partgeneral; }
3144: }
3145:
3146: # ---------------------------------------------------- Any other user namespace
3147: } elsif ($realm eq 'environment') {
3148: # ----------------------------------------------------------------- environment
3149: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3150: return $ENV{'environment.'.$spacequalifierrest};
3151: } else {
3152: my %returnhash=&userenvironment($udom,$uname,
3153: $spacequalifierrest);
3154: return $returnhash{$spacequalifierrest};
3155: }
3156: } elsif ($realm eq 'system') {
3157: # ----------------------------------------------------------------- system.time
3158: if ($space eq 'time') {
3159: return time;
3160: }
3161: }
3162: return '';
3163: }
3164:
3165: sub add_prefix_and_part {
3166: my ($prefix,$part)=@_;
3167: my $keyroot;
3168: if (defined($prefix) && $prefix !~ /^__/) {
3169: # prefix that has a part already
3170: $keyroot=$prefix;
3171: } elsif (defined($prefix)) {
3172: # prefix that is missing a part
3173: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3174: } else {
3175: # no prefix at all
3176: if (defined($part)) { $keyroot='_'.$part; }
3177: }
3178: return $keyroot;
3179: }
3180:
3181: # ---------------------------------------------------------------- Get metadata
3182:
3183: sub metadata {
3184: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3185:
3186: $uri=&declutter($uri);
3187: # if it is a non metadata possible uri return quickly
3188: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3189: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|)) {
3190: return '';
3191: }
3192: my $filename=$uri;
3193: $uri=~s/\.meta$//;
3194: #
3195: # Is the metadata already cached?
3196: # Look at timestamp of caching
3197: # Everything is cached by the main uri, libraries are never directly cached
3198: #
3199: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
3200: #
3201: # Is this a recursive call for a library?
3202: #
3203: if ($liburi) {
3204: $liburi=&declutter($liburi);
3205: $filename=$liburi;
3206: }
3207: my %metathesekeys=();
3208: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3209: my $metastring=&getfile(&filelocation('',&clutter($filename)));
3210: my $parser=HTML::LCParser->new(\$metastring);
3211: my $token;
3212: undef %metathesekeys;
3213: while ($token=$parser->get_token) {
3214: if ($token->[0] eq 'S') {
3215: if (defined($token->[2]->{'package'})) {
3216: #
3217: # This is a package - get package info
3218: #
3219: my $package=$token->[2]->{'package'};
3220: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3221: if (defined($token->[2]->{'id'})) {
3222: $keyroot.='_'.$token->[2]->{'id'};
3223: }
3224: if ($metacache{$uri.':packages'}) {
3225: $metacache{$uri.':packages'}.=','.$package.$keyroot;
3226: } else {
3227: $metacache{$uri.':packages'}=$package.$keyroot;
3228: }
3229: foreach (keys %packagetab) {
3230: if ($_=~/^$package\&/) {
3231: my ($pack,$name,$subp)=split(/\&/,$_);
3232: my $value=$packagetab{$_};
3233: my $part=$keyroot;
3234: $part=~s/^\_//;
3235: if ($subp eq 'display') {
3236: $value.=' [Part: '.$part.']';
3237: }
3238: my $unikey='parameter'.$keyroot.'_'.$name;
3239: if ($subp eq 'default') { $unikey='parameter_0_'.$name; }
3240: $metathesekeys{$unikey}=1;
3241: $metacache{$uri.':'.$unikey.'.part'}=$part;
3242: unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
3243: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
3244: }
3245: if (defined($metacache{$uri.':'.$unikey.'.default'})) {
3246: $metacache{$uri.':'.$unikey}=
3247: $metacache{$uri.':'.$unikey.'.default'}
3248: }
3249: }
3250: }
3251: } else {
3252: #
3253: # This is not a package - some other kind of start tag
3254: #
3255: my $entry=$token->[1];
3256: my $unikey;
3257: if ($entry eq 'import') {
3258: $unikey='';
3259: } else {
3260: $unikey=$entry;
3261: }
3262: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3263:
3264: if (defined($token->[2]->{'id'})) {
3265: $unikey.='_'.$token->[2]->{'id'};
3266: }
3267:
3268: if ($entry eq 'import') {
3269: #
3270: # Importing a library here
3271: #
3272: if ($depthcount<20) {
3273: my $location=$parser->get_text('/import');
3274: my $dir=$filename;
3275: $dir=~s|[^/]*$||;
3276: $location=&filelocation($dir,$location);
3277: foreach (sort(split(/\,/,&metadata($uri,'keys',
3278: $location,$unikey,
3279: $depthcount+1)))) {
3280: $metathesekeys{$_}=1;
3281: }
3282: }
3283: } else {
3284:
3285: if (defined($token->[2]->{'name'})) {
3286: $unikey.='_'.$token->[2]->{'name'};
3287: }
3288: $metathesekeys{$unikey}=1;
3289: foreach (@{$token->[3]}) {
3290: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
3291: }
3292: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
3293: my $default=$metacache{$uri.':'.$unikey.'.default'};
3294: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
3295: # only ws inside the tag, and not in default, so use default
3296: # as value
3297: $metacache{$uri.':'.$unikey}=$default;
3298: } else {
3299: # either something interesting inside the tag or default
3300: # uninteresting
3301: $metacache{$uri.':'.$unikey}=$internaltext;
3302: }
3303: # end of not-a-package not-a-library import
3304: }
3305: # end of not-a-package start tag
3306: }
3307: # the next is the end of "start tag"
3308: }
3309: }
3310: # are there custom rights to evaluate
3311: if ($metacache{$uri.':copyright'} eq 'custom') {
3312:
3313: #
3314: # Importing a rights file here
3315: #
3316: unless ($depthcount) {
3317: my $location=$metacache{$uri.':customdistributionfile'};
3318: my $dir=$filename;
3319: $dir=~s|[^/]*$||;
3320: $location=&filelocation($dir,$location);
3321: foreach (sort(split(/\,/,&metadata($uri,'keys',
3322: $location,'_rights',
3323: $depthcount+1)))) {
3324: $metathesekeys{$_}=1;
3325: }
3326: }
3327: }
3328: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
3329: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
3330: $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
3331: $metacache{$uri.':cachedtimestamp'}=time;
3332: # this is the end of "was not already recently cached
3333: }
3334: return $metacache{$uri.':'.$what};
3335: }
3336:
3337: sub metadata_generate_part0 {
3338: my ($metadata,$metacache,$uri) = @_;
3339: my %allnames;
3340: foreach my $metakey (sort keys %$metadata) {
3341: if ($metakey=~/^parameter\_(.*)/) {
3342: my $part=$$metacache{$uri.':'.$metakey.'.part'};
3343: my $name=$$metacache{$uri.':'.$metakey.'.name'};
3344: if (! exists($$metadata{'parameter_0_'.$name})) {
3345: $allnames{$name}=$part;
3346: }
3347: }
3348: }
3349: foreach my $name (keys(%allnames)) {
3350: $$metadata{"parameter_0_$name"}=1;
3351: my $key="$uri:parameter_0_$name";
3352: $$metacache{"$key.part"}='0';
3353: $$metacache{"$key.name"}=$name;
3354: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
3355: $allnames{$name}.'_'.$name.
3356: '.type'};
3357: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
3358: '.display'};
3359: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3360: $olddis=~s/$expr/\[Part: 0\]/;
3361: $$metacache{"$key.display"}=$olddis;
3362: }
3363: }
3364:
3365: # ------------------------------------------------- Get the title of a resource
3366:
3367: sub gettitle {
3368: my $urlsymb=shift;
3369: my $symb=&symbread($urlsymb);
3370: unless ($symb) {
3371: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3372: return &metadata($urlsymb,'title');
3373: }
3374: if ($titlecache{$symb}) { return $titlecache{$symb}; }
3375: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3376: my $title='';
3377: my %bighash;
3378: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3379: &GDBM_READER(),0640)) {
3380: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3381: $title=$bighash{'title_'.$mapid.'.'.$resid};
3382: untie %bighash;
3383: }
3384: if ($title) {
3385: $titlecache{$symb}=$title;
3386: return $title;
3387: } else {
3388: return &metadata($urlsymb,'title');
3389: }
3390: }
3391:
3392: # ------------------------------------------------- Update symbolic store links
3393:
3394: sub symblist {
3395: my ($mapname,%newhash)=@_;
3396: $mapname=declutter($mapname);
3397: my %hash;
3398: if (($ENV{'request.course.fn'}) && (%newhash)) {
3399: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3400: &GDBM_WRCREAT(),0640)) {
3401: foreach (keys %newhash) {
3402: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
3403: }
3404: if (untie(%hash)) {
3405: return 'ok';
3406: }
3407: }
3408: }
3409: return 'error';
3410: }
3411:
3412: # --------------------------------------------------------------- Verify a symb
3413:
3414: sub symbverify {
3415: my ($symb,$thisfn)=@_;
3416: $thisfn=&declutter($thisfn);
3417: # direct jump to resource in page or to a sequence - will construct own symbs
3418: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
3419: # check URL part
3420: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3421: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
3422:
3423: $symb=&symbclean($symb);
3424:
3425: my %bighash;
3426: my $okay=0;
3427: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3428: &GDBM_READER(),0640)) {
3429: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3430: unless ($ids) {
3431: $ids=$bighash{'ids_/'.$thisfn};
3432: }
3433: if ($ids) {
3434: # ------------------------------------------------------------------- Has ID(s)
3435: foreach (split(/\,/,$ids)) {
3436: my ($mapid,$resid)=split(/\./,$_);
3437: if (
3438: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
3439: eq $symb) {
3440: $okay=1;
3441: }
3442: }
3443: }
3444: untie(%bighash);
3445: }
3446: return $okay;
3447: }
3448:
3449: # --------------------------------------------------------------- Clean-up symb
3450:
3451: sub symbclean {
3452: my $symb=shift;
3453:
3454: # remove version from map
3455: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
3456:
3457: # remove version from URL
3458: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
3459:
3460: return $symb;
3461: }
3462:
3463: # ------------------------------------------------------ Return symb list entry
3464:
3465: sub symbread {
3466: my ($thisfn,$donotrecurse)=@_;
3467: # no filename provided? try from environment
3468: unless ($thisfn) {
3469: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
3470: $thisfn=$ENV{'request.filename'};
3471: }
3472: # is that filename actually a symb? Verify, clean, and return
3473: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
3474: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
3475: }
3476: $thisfn=declutter($thisfn);
3477: my %hash;
3478: my %bighash;
3479: my $syval='';
3480: if (($ENV{'request.course.fn'}) && ($thisfn)) {
3481: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3482: &GDBM_READER(),0640)) {
3483: $syval=$hash{$thisfn};
3484: untie(%hash);
3485: }
3486: # ---------------------------------------------------------- There was an entry
3487: if ($syval) {
3488: unless ($syval=~/\_\d+$/) {
3489: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
3490: &appenv('request.ambiguous' => $thisfn);
3491: return '';
3492: }
3493: $syval.=$1;
3494: }
3495: } else {
3496: # ------------------------------------------------------- Was not in symb table
3497: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3498: &GDBM_READER(),0640)) {
3499: # ---------------------------------------------- Get ID(s) for current resource
3500: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3501: unless ($ids) {
3502: $ids=$bighash{'ids_/'.$thisfn};
3503: }
3504: unless ($ids) {
3505: # alias?
3506: $ids=$bighash{'mapalias_'.$thisfn};
3507: }
3508: if ($ids) {
3509: # ------------------------------------------------------------------- Has ID(s)
3510: my @possibilities=split(/\,/,$ids);
3511: if ($#possibilities==0) {
3512: # ----------------------------------------------- There is only one possibility
3513: my ($mapid,$resid)=split(/\./,$ids);
3514: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
3515: } elsif (!$donotrecurse) {
3516: # ------------------------------------------ There is more than one possibility
3517: my $realpossible=0;
3518: foreach (@possibilities) {
3519: my $file=$bighash{'src_'.$_};
3520: if (&allowed('bre',$file)) {
3521: my ($mapid,$resid)=split(/\./,$_);
3522: if ($bighash{'map_type_'.$mapid} ne 'page') {
3523: $realpossible++;
3524: $syval=declutter($bighash{'map_id_'.$mapid}).
3525: '___'.$resid;
3526: }
3527: }
3528: }
3529: if ($realpossible!=1) { $syval=''; }
3530: } else {
3531: $syval='';
3532: }
3533: }
3534: untie(%bighash)
3535: }
3536: }
3537: if ($syval) {
3538: return &symbclean($syval.'___'.$thisfn);
3539: }
3540: }
3541: &appenv('request.ambiguous' => $thisfn);
3542: return '';
3543: }
3544:
3545: # ---------------------------------------------------------- Return random seed
3546:
3547: sub numval {
3548: my $txt=shift;
3549: $txt=~tr/A-J/0-9/;
3550: $txt=~tr/a-j/0-9/;
3551: $txt=~tr/K-T/0-9/;
3552: $txt=~tr/k-t/0-9/;
3553: $txt=~tr/U-Z/0-5/;
3554: $txt=~tr/u-z/0-5/;
3555: $txt=~s/\D//g;
3556: return int($txt);
3557: }
3558:
3559: sub rndseed {
3560: my ($symb,$courseid,$domain,$username)=@_;
3561: if (!$symb) {
3562: unless ($symb=&symbread()) { return time; }
3563: }
3564: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
3565: if (!$domain) {$domain=$ENV{'user.domain'};}
3566: if (!$username) {$username=$ENV{'user.name'};}
3567: {
3568: use integer;
3569: my $symbchck=unpack("%32C*",$symb) << 27;
3570: my $symbseed=numval($symb) << 22;
3571: my $namechck=unpack("%32C*",$username) << 17;
3572: my $nameseed=numval($username) << 12;
3573: my $domainseed=unpack("%32C*",$domain) << 7;
3574: my $courseseed=unpack("%32C*",$courseid);
3575: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
3576: #uncommenting these lines can break things!
3577: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
3578: #&Apache::lonxml::debug("rndseed :$num:$symb");
3579: return $num;
3580: }
3581: }
3582:
3583: sub ireceipt {
3584: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
3585: my $cuname=unpack("%32C*",$funame);
3586: my $cudom=unpack("%32C*",$fudom);
3587: my $cucourseid=unpack("%32C*",$fucourseid);
3588: my $cusymb=unpack("%32C*",$fusymb);
3589: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
3590: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
3591: ($cunique%$cuname+
3592: $cunique%$cudom+
3593: $cusymb%$cuname+
3594: $cusymb%$cudom+
3595: $cucourseid%$cuname+
3596: $cucourseid%$cudom);
3597: }
3598:
3599: sub receipt {
3600: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
3601: return &ireceipt($name,$domain,$courseid,$symb);
3602: }
3603:
3604: # ------------------------------------------------------------ Serves up a file
3605: # returns either the contents of the file or a -1
3606: sub getfile {
3607: my $file=shift;
3608: if ($file=~/^\/*uploaded\//) { # user file
3609: my $ua=new LWP::UserAgent;
3610: my $request=new HTTP::Request('GET',&tokenwrapper($file));
3611: my $response=$ua->request($request);
3612: if ($response->is_success()) {
3613: return $response->content;
3614: } else {
3615: return -1;
3616: }
3617: } else { # normal file from res space
3618: &repcopy($file);
3619: if (! -e $file ) { return -1; };
3620: my $fh=Apache::File->new($file);
3621: my $a='';
3622: while (<$fh>) { $a .=$_; }
3623: return $a;
3624: }
3625: }
3626:
3627: sub filelocation {
3628: my ($dir,$file) = @_;
3629: my $location;
3630: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
3631: if ($file=~m:^/~:) { # is a contruction space reference
3632: $location = $file;
3633: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
3634: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
3635: $location=$file;
3636: } else {
3637: $file=~s/^$perlvar{'lonDocRoot'}//;
3638: $file=~s:^/*res::;
3639: if ( !( $file =~ m:^/:) ) {
3640: $location = $dir. '/'.$file;
3641: } else {
3642: $location = '/home/httpd/html/res'.$file;
3643: }
3644: }
3645: $location=~s://+:/:g; # remove duplicate /
3646: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
3647: return $location;
3648: }
3649:
3650: sub hreflocation {
3651: my ($dir,$file)=@_;
3652: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
3653: my $finalpath=filelocation($dir,$file);
3654: $finalpath=~s/^\/home\/httpd\/html//;
3655: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
3656: return $finalpath;
3657: } else {
3658: return $file;
3659: }
3660: }
3661:
3662: # ------------------------------------------------------------- Declutters URLs
3663:
3664: sub declutter {
3665: my $thisfn=shift;
3666: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
3667: $thisfn=~s/^\///;
3668: $thisfn=~s/^res\///;
3669: $thisfn=~s/\?.+$//;
3670: return $thisfn;
3671: }
3672:
3673: # ------------------------------------------------------------- Clutter up URLs
3674:
3675: sub clutter {
3676: my $thisfn='/'.&declutter(shift);
3677: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
3678: $thisfn='/res'.$thisfn;
3679: }
3680: return $thisfn;
3681: }
3682:
3683: # -------------------------------------------------------- Escape Special Chars
3684:
3685: sub escape {
3686: my $str=shift;
3687: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3688: return $str;
3689: }
3690:
3691: # ----------------------------------------------------- Un-Escape Special Chars
3692:
3693: sub unescape {
3694: my $str=shift;
3695: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3696: return $str;
3697: }
3698:
3699: # ================================================================ Main Program
3700:
3701: sub goodbye {
3702: &logthis("Starting Shut down");
3703: &flushcourselogs();
3704: &logthis("Shutting down");
3705: }
3706:
3707: BEGIN {
3708: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
3709: unless ($readit) {
3710: {
3711: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
3712:
3713: while (my $configline=<$config>) {
3714: if ($configline =~ /^[^\#]*PerlSetVar/) {
3715: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3716: chomp($varvalue);
3717: $perlvar{$varname}=$varvalue;
3718: }
3719: }
3720: }
3721: {
3722: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
3723:
3724: while (my $configline=<$config>) {
3725: if ($configline =~ /^[^\#]*PerlSetVar/) {
3726: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3727: chomp($varvalue);
3728: $perlvar{$varname}=$varvalue;
3729: }
3730: }
3731: }
3732:
3733: # ------------------------------------------------------------ Read domain file
3734: {
3735: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
3736: '/domain.tab');
3737: %domaindescription = ();
3738: %domain_auth_def = ();
3739: %domain_auth_arg_def = ();
3740: if ($fh) {
3741: while (<$fh>) {
3742: next if /^\#/;
3743: chomp;
3744: my ($domain, $domain_description, $def_auth, $def_auth_arg)
3745: = split(/:/,$_,4);
3746: $domain_auth_def{$domain}=$def_auth;
3747: $domain_auth_arg_def{$domain}=$def_auth_arg;
3748: $domaindescription{$domain}=$domain_description;
3749: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
3750: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
3751: }
3752: }
3753: }
3754:
3755:
3756: # ------------------------------------------------------------- Read hosts file
3757: {
3758: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
3759:
3760: while (my $configline=<$config>) {
3761: next if ($configline =~ /^(\#|\s*$)/);
3762: chomp($configline);
3763: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
3764: if ($id && $domain && $role && $name && $ip) {
3765: $hostname{$id}=$name;
3766: $hostdom{$id}=$domain;
3767: $hostip{$id}=$ip;
3768: $iphost{$ip}=$id;
3769: if ($role eq 'library') { $libserv{$id}=$name; }
3770: } else {
3771: if ($configline) {
3772: &logthis("Skipping hosts.tab line -$configline-");
3773: }
3774: }
3775: }
3776: }
3777:
3778: # ------------------------------------------------------ Read spare server file
3779: {
3780: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3781:
3782: while (my $configline=<$config>) {
3783: chomp($configline);
3784: if ($configline) {
3785: $spareid{$configline}=1;
3786: }
3787: }
3788: }
3789: # ------------------------------------------------------------ Read permissions
3790: {
3791: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3792:
3793: while (my $configline=<$config>) {
3794: chomp($configline);
3795: if ($configline) {
3796: my ($role,$perm)=split(/ /,$configline);
3797: if ($perm ne '') { $pr{$role}=$perm; }
3798: }
3799: }
3800: }
3801:
3802: # -------------------------------------------- Read plain texts for permissions
3803: {
3804: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3805:
3806: while (my $configline=<$config>) {
3807: chomp($configline);
3808: if ($configline) {
3809: my ($short,$plain)=split(/:/,$configline);
3810: if ($plain ne '') { $prp{$short}=$plain; }
3811: }
3812: }
3813: }
3814:
3815: # ---------------------------------------------------------- Read package table
3816: {
3817: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3818:
3819: while (my $configline=<$config>) {
3820: chomp($configline);
3821: my ($short,$plain)=split(/:/,$configline);
3822: my ($pack,$name)=split(/\&/,$short);
3823: if ($plain ne '') {
3824: $packagetab{$pack.'&'.$name.'&name'}=$name;
3825: $packagetab{$short}=$plain;
3826: }
3827: }
3828: }
3829:
3830: # ------------- set up temporary directory
3831: {
3832: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
3833:
3834: }
3835:
3836: %metacache=();
3837:
3838: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
3839: $dumpcount=0;
3840:
3841: &logtouch();
3842: &logthis('<font color=yellow>INFO: Read configuration</font>');
3843: $readit=1;
3844: }
3845: }
3846:
3847: 1;
3848: __END__
3849:
3850: =pod
3851:
3852: =head1 NAME
3853:
3854: Apache::lonnet - Subroutines to ask questions about things in the network.
3855:
3856: =head1 SYNOPSIS
3857:
3858: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
3859:
3860: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
3861:
3862: Common parameters:
3863:
3864: =over 4
3865:
3866: =item *
3867:
3868: $uname : an internal username (if $cname expecting a course Id specifically)
3869:
3870: =item *
3871:
3872: $udom : a domain (if $cdom expecting a course's domain specifically)
3873:
3874: =item *
3875:
3876: $symb : a resource instance identifier
3877:
3878: =item *
3879:
3880: $namespace : the name of a .db file that contains the data needed or
3881: being set.
3882:
3883: =back
3884:
3885: =head1 INTRODUCTION
3886:
3887: This module provides subroutines which interact with the
3888: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
3889: - classes
3890: - users
3891: - resources
3892:
3893: For many of these objects you can also use this to store data about
3894: them or modify them in various ways.
3895:
3896: This is part of the LearningOnline Network with CAPA project
3897: described at http://www.lon-capa.org.
3898:
3899: =head1 RETURN MESSAGES
3900:
3901: =over 4
3902:
3903: =item *
3904:
3905: con_lost : unable to contact remote host
3906:
3907: =item *
3908:
3909: con_delayed : unable to contact remote host, message will be delivered
3910: when the connection is brought back up
3911:
3912: =item *
3913:
3914: con_failed : unable to contact remote host and unable to save message
3915: for later delivery
3916:
3917: =item *
3918:
3919: error: : an error a occured, a description of the error follows the :
3920:
3921: =item *
3922:
3923: no_such_host : unable to fund a host associated with the user/domain
3924: that was requested
3925:
3926: =back
3927:
3928: =head1 PUBLIC SUBROUTINES
3929:
3930: =head2 Session Environment Functions
3931:
3932: =over 4
3933:
3934: =item *
3935:
3936: appenv(%hash) : the value of %hash is written to the user envirnoment
3937: file, and will be restored for each access this user makes during this
3938: session, also modifies the %ENV for the current process
3939:
3940: =item *
3941:
3942: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
3943:
3944: =back
3945:
3946: =head2 User Information
3947:
3948: =over 4
3949:
3950: =item *
3951:
3952: queryauthenticate($uname,$udom) : try to determine user's current
3953: authentication scheme
3954:
3955: =item *
3956:
3957: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
3958: servers (first use the current one), $upass should be the users password
3959:
3960: =item *
3961:
3962: homeserver($uname,$udom) : find the server which has the user's
3963: directory and files (there must be only one), this caches the answer,
3964: and also caches if there is a borken connection.
3965:
3966: =item *
3967:
3968: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
3969: unique resource in a domain, there must be only 1 ID per username, and
3970: only 1 username per ID in a specific domain) (returns hash:
3971: id=>name,id=>name)
3972:
3973: =item *
3974:
3975: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
3976: name=>id,name=>id)
3977:
3978: =item *
3979:
3980: idput($udom,%ids) : store away a list of names and associated IDs
3981:
3982: =item *
3983:
3984: rolesinit($udom,$username,$authhost) : get user privileges
3985:
3986: =item *
3987:
3988: usection($udom,$uname,$cname) : finds the section of student in the
3989: course $cname, return section name/number or '' for "not in course"
3990: and '-1' for "no section"
3991:
3992: =item *
3993:
3994: userenvironment($udom,$uname,@what) : gets the values of the keys
3995: passed in @what from the requested user's environment, returns a hash
3996:
3997: =back
3998:
3999: =head2 User Roles
4000:
4001: =over 4
4002:
4003: =item *
4004:
4005: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
4006: actions
4007: F: full access
4008: U,I,K: authentication modes (cxx only)
4009: '': forbidden
4010: 1: user needs to choose course
4011: 2: browse allowed
4012:
4013: =item *
4014:
4015: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
4016: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
4017: and course level
4018:
4019: =item *
4020:
4021: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
4022: explanation of a user role term
4023:
4024: =back
4025:
4026: =head2 User Modification
4027:
4028: =over 4
4029:
4030: =item *
4031:
4032: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
4033: user for the level given by URL. Optional start and end dates (leave empty
4034: string or zero for "no date")
4035:
4036: =item *
4037:
4038: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
4039: change a users, password, possible return values are: ok,
4040: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
4041: refused
4042:
4043: =item *
4044:
4045: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
4046:
4047: =item *
4048:
4049: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
4050: modify user
4051:
4052: =item *
4053:
4054: modifystudent
4055:
4056: modify a students enrollment and identification information.
4057: The course id is resolved based on the current users environment.
4058: This means the envoking user must be a course coordinator or otherwise
4059: associated with a course.
4060:
4061: This call is essentially a wrapper for lonnet::modifyuser and
4062: lonnet::modify_student_enrollment
4063:
4064: Inputs:
4065:
4066: =over 4
4067:
4068: =item B<$udom> Students loncapa domain
4069:
4070: =item B<$uname> Students loncapa login name
4071:
4072: =item B<$uid> Students id/student number
4073:
4074: =item B<$umode> Students authentication mode
4075:
4076: =item B<$upass> Students password
4077:
4078: =item B<$first> Students first name
4079:
4080: =item B<$middle> Students middle name
4081:
4082: =item B<$last> Students last name
4083:
4084: =item B<$gene> Students generation
4085:
4086: =item B<$usec> Students section in course
4087:
4088: =item B<$end> Unix time of the roles expiration
4089:
4090: =item B<$start> Unix time of the roles start date
4091:
4092: =item B<$forceid> If defined, allow $uid to be changed
4093:
4094: =item B<$desiredhome> server to use as home server for student
4095:
4096: =back
4097:
4098: =item *
4099:
4100: modify_student_enrollment
4101:
4102: Change a students enrollment status in a class. The environment variable
4103: 'role.request.course' must be defined for this function to proceed.
4104:
4105: Inputs:
4106:
4107: =over 4
4108:
4109: =item $udom, students domain
4110:
4111: =item $uname, students name
4112:
4113: =item $uid, students user id
4114:
4115: =item $first, students first name
4116:
4117: =item $middle
4118:
4119: =item $last
4120:
4121: =item $gene
4122:
4123: =item $usec
4124:
4125: =item $end
4126:
4127: =item $start
4128:
4129: =back
4130:
4131:
4132: =item *
4133:
4134: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
4135: custom role; give a custom role to a user for the level given by URL. Specify
4136: name and domain of role author, and role name
4137:
4138: =item *
4139:
4140: revokerole($udom,$uname,$url,$role) : revoke a role for url
4141:
4142: =item *
4143:
4144: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
4145:
4146: =back
4147:
4148: =head2 Course Infomation
4149:
4150: =over 4
4151:
4152: =item *
4153:
4154: coursedescription($courseid) : course description
4155:
4156: =item *
4157:
4158: courseresdata($coursenum,$coursedomain,@which) : request for current
4159: parameter setting for a specific course, @what should be a list of
4160: parameters to ask about. This routine caches answers for 5 minutes.
4161:
4162: =back
4163:
4164: =head2 Course Modification
4165:
4166: =over 4
4167:
4168: =item *
4169:
4170: writecoursepref($courseid,%prefs) : write preferences (environment
4171: database) for a course
4172:
4173: =item *
4174:
4175: createcourse($udom,$description,$url) : make/modify course
4176:
4177: =back
4178:
4179: =head2 Resource Subroutines
4180:
4181: =over 4
4182:
4183: =item *
4184:
4185: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
4186:
4187: =item *
4188:
4189: repcopy($filename) : subscribes to the requested file, and attempts to
4190: replicate from the owning library server, Might return
4191: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
4192: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
4193: resource. Expects the local filesystem pathname
4194: (/home/httpd/html/res/....)
4195:
4196: =back
4197:
4198: =head2 Resource Information
4199:
4200: =over 4
4201:
4202: =item *
4203:
4204: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
4205: a vairety of different possible values, $varname should be a request
4206: string, and the other parameters can be used to specify who and what
4207: one is asking about.
4208:
4209: Possible values for $varname are environment.lastname (or other item
4210: from the envirnment hash), user.name (or someother aspect about the
4211: user), resource.0.maxtries (or some other part and parameter of a
4212: resource)
4213:
4214: =item *
4215:
4216: directcondval($number) : get current value of a condition; reads from a state
4217: string
4218:
4219: =item *
4220:
4221: condval($condidx) : value of condition index based on state
4222:
4223: =item *
4224:
4225: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
4226: resource's metadata, $what should be either a specific key, or either
4227: 'keys' (to get a list of possible keys) or 'packages' to get a list of
4228: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
4229:
4230: this function automatically caches all requests
4231:
4232: =item *
4233:
4234: metadata_query($query,$custom,$customshow) : make a metadata query against the
4235: network of library servers; returns file handle of where SQL and regex results
4236: will be stored for query
4237:
4238: =item *
4239:
4240: symbread($filename) : return symbolic list entry (filename argument optional);
4241: returns the data handle
4242:
4243: =item *
4244:
4245: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
4246: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
4247: failure, user must be in a course, as it assumes the existance of the
4248: course initi hash, and uses $ENV('request.course.id'}
4249:
4250:
4251: =item *
4252:
4253: symbclean($symb) : removes versions numbers from a symb, returns the
4254: cleaned symb
4255:
4256: =item *
4257:
4258: is_on_map($uri) : checks if the $uri is somewhere on the current
4259: course map, user must be in a course for it to work.
4260:
4261: =item *
4262:
4263: numval($salt) : return random seed value (addend for rndseed)
4264:
4265: =item *
4266:
4267: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
4268: a random seed, all arguments are optional, if they aren't sent it uses the
4269: environment to derive them. Note: if symb isn't sent and it can't get one
4270: from &symbread it will use the current time as its return value
4271:
4272: =item *
4273:
4274: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
4275: unfakeable, receipt
4276:
4277: =item *
4278:
4279: receipt() : API to ireceipt working off of ENV values; given out to users
4280:
4281: =item *
4282:
4283: countacc($url) : count the number of accesses to a given URL
4284:
4285: =item *
4286:
4287: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
4288:
4289: =item *
4290:
4291: checkin($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 $tcrsid)
4292:
4293: =item *
4294:
4295: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
4296:
4297: =item *
4298:
4299: devalidate($symb) : devalidate temporary spreadsheet calculations,
4300: forcing spreadsheet to reevaluate the resource scores next time.
4301:
4302: =back
4303:
4304: =head2 Storing/Retreiving Data
4305:
4306: =over 4
4307:
4308: =item *
4309:
4310: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
4311: for this url; hashref needs to be given and should be a \%hashname; the
4312: remaining args aren't required and if they aren't passed or are '' they will
4313: be derived from the ENV
4314:
4315: =item *
4316:
4317: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
4318: uses critical subroutine
4319:
4320: =item *
4321:
4322: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
4323: all args are optional
4324:
4325: =item *
4326:
4327: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
4328: works very similar to store/cstore, but all data is stored in a
4329: temporary location and can be reset using tmpreset, $storehash should
4330: be a hash reference, returns nothing on success
4331:
4332: =item *
4333:
4334: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
4335: similar to restore, but all data is stored in a temporary location and
4336: can be reset using tmpreset. Returns a hash of values on success,
4337: error string otherwise.
4338:
4339: =item *
4340:
4341: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
4342: deltes all keys for $symb form the temporary storage hash.
4343:
4344: =item *
4345:
4346: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4347: reference filled in from namesp ($udom and $uname are optional)
4348:
4349: =item *
4350:
4351: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
4352: namesp ($udom and $uname are optional)
4353:
4354: =item *
4355:
4356: dump($namespace,$udom,$uname,$regexp) :
4357: dumps the complete (or key matching regexp) namespace into a hash
4358: ($udom, $uname and $regexp are optional)
4359:
4360: =item *
4361:
4362: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
4363: ($udom and $uname are optional)
4364:
4365: =item *
4366:
4367: cput($namespace,$storehash,$udom,$uname) : critical put
4368: ($udom and $uname are optional)
4369:
4370: =item *
4371:
4372: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4373: reference filled in from namesp (encrypts the return communication)
4374: ($udom and $uname are optional)
4375:
4376: =item *
4377:
4378: log($udom,$name,$home,$message) : write to permanent log for user; use
4379: critical subroutine
4380:
4381: =back
4382:
4383: =head2 Network Status Functions
4384:
4385: =over 4
4386:
4387: =item *
4388:
4389: dirlist($uri) : return directory list based on URI
4390:
4391: =item *
4392:
4393: spareserver() : find server with least workload from spare.tab
4394:
4395: =back
4396:
4397: =head2 Apache Request
4398:
4399: =over 4
4400:
4401: =item *
4402:
4403: ssi($url,%hash) : server side include, does a complete request cycle on url to
4404: localhost, posts hash
4405:
4406: =back
4407:
4408: =head2 Data to String to Data
4409:
4410: =over 4
4411:
4412: =item *
4413:
4414: hash2str(%hash) : convert a hash into a string complete with escaping and '='
4415: and '&' separators, supports elements that are arrayrefs and hashrefs
4416:
4417: =item *
4418:
4419: hashref2str($hashref) : convert a hashref into a string complete with
4420: escaping and '=' and '&' separators, supports elements that are
4421: arrayrefs and hashrefs
4422:
4423: =item *
4424:
4425: arrayref2str($arrayref) : convert an arrayref into a string complete
4426: with escaping and '&' separators, supports elements that are arrayrefs
4427: and hashrefs
4428:
4429: =item *
4430:
4431: str2hash($string) : convert string to hash using unescaping and
4432: splitting on '=' and '&', supports elements that are arrayrefs and
4433: hashrefs
4434:
4435: =item *
4436:
4437: str2array($string) : convert string to hash using unescaping and
4438: splitting on '&', supports elements that are arrayrefs and hashrefs
4439:
4440: =back
4441:
4442: =head2 Logging Routines
4443:
4444: =over 4
4445:
4446: These routines allow one to make log messages in the lonnet.log and
4447: lonnet.perm logfiles.
4448:
4449: =item *
4450:
4451: logtouch() : make sure the logfile, lonnet.log, exists
4452:
4453: =item *
4454:
4455: logthis() : append message to the normal lonnet.log file, it gets
4456: preiodically rolled over and deleted.
4457:
4458: =item *
4459:
4460: logperm() : append a permanent message to lonnet.perm.log, this log
4461: file never gets deleted by any automated portion of the system, only
4462: messages of critical importance should go in here.
4463:
4464: =back
4465:
4466: =head2 General File Helper Routines
4467:
4468: =over 4
4469:
4470: =item *
4471:
4472: getfile($file) : returns the entire contents of a file or -1; it
4473: properly subscribes to and replicates the file if neccessary.
4474:
4475: =item *
4476:
4477: filelocation($dir,$file) : returns file system location of a file
4478: based on URI; meant to be "fairly clean" absolute reference, $dir is a
4479: directory that relative $file lookups are to looked in ($dir of /a/dir
4480: and a file of ../bob will become /a/bob)
4481:
4482: =item *
4483:
4484: hreflocation($dir,$file) : returns file system location or a URL; same as
4485: filelocation except for hrefs
4486:
4487: =item *
4488:
4489: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
4490:
4491: =back
4492:
4493: =head2 HTTP Helper Routines
4494:
4495: =over 4
4496:
4497: =item *
4498:
4499: escape() : unpack non-word characters into CGI-compatible hex codes
4500:
4501: =item *
4502:
4503: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
4504:
4505: =back
4506:
4507: =head1 PRIVATE SUBROUTINES
4508:
4509: =head2 Underlying communication routines (Shouldn't call)
4510:
4511: =over 4
4512:
4513: =item *
4514:
4515: subreply() : tries to pass a message to lonc, returns con_lost if incapable
4516:
4517: =item *
4518:
4519: reply() : uses subreply to send a message to remote machine, logs all failures
4520:
4521: =item *
4522:
4523: critical() : passes a critical message to another server; if cannot
4524: get through then place message in connection buffer directory and
4525: returns con_delayed, if incapable of saving message, returns
4526: con_failed
4527:
4528: =item *
4529:
4530: reconlonc() : tries to reconnect lonc client processes.
4531:
4532: =back
4533:
4534: =head2 Resource Access Logging
4535:
4536: =over 4
4537:
4538: =item *
4539:
4540: flushcourselogs() : flush (save) buffer logs and access logs
4541:
4542: =item *
4543:
4544: courselog($what) : save message for course in hash
4545:
4546: =item *
4547:
4548: courseacclog($what) : save message for course using &courselog(). Perform
4549: special processing for specific resource types (problems, exams, quizzes, etc).
4550:
4551: =item *
4552:
4553: goodbye() : flush course logs and log shutting down; it is called in srm.conf
4554: as a PerlChildExitHandler
4555:
4556: =back
4557:
4558: =head2 Other
4559:
4560: =over 4
4561:
4562: =item *
4563:
4564: symblist($mapname,%newhash) : update symbolic storage links
4565:
4566: =back
4567:
4568: =cut
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