1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.345 2003/03/22 21:23:35 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 $udom.':'.$uname)) { # 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',{$ckey=>$udom.':'.$uname},$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 $udom.':'.$uname);
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: $allroles{'cm./'}.=':'.$syspriv;
1734: $allroles{$spec.'./'}.=':'.$syspriv;
1735: if ($tdomain ne '') {
1736: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1737: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1738: if ($trest ne '') {
1739: $allroles{'cm.'.$area}.=':'.$coursepriv;
1740: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1741: }
1742: }
1743: }
1744: }
1745: } else {
1746: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1747: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1748: if ($tdomain ne '') {
1749: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1750: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1751: if ($trest ne '') {
1752: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1753: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1754: }
1755: }
1756: }
1757: }
1758: }
1759: }
1760: my $adv=0;
1761: my $author=0;
1762: foreach (keys %allroles) {
1763: %thesepriv=();
1764: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1765: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1766: foreach (split(/:/,$allroles{$_})) {
1767: if ($_ ne '') {
1768: my ($privilege,$restrictions)=split(/&/,$_);
1769: if ($restrictions eq '') {
1770: $thesepriv{$privilege}='F';
1771: } else {
1772: if ($thesepriv{$privilege} ne 'F') {
1773: $thesepriv{$privilege}.=$restrictions;
1774: }
1775: }
1776: }
1777: }
1778: $thesestr='';
1779: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1780: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1781: }
1782: $userroles.='user.adv='.$adv."\n".
1783: 'user.author='.$author."\n";
1784: $ENV{'user.adv'}=$adv;
1785: }
1786: return $userroles;
1787: }
1788:
1789: # --------------------------------------------------------------- get interface
1790:
1791: sub get {
1792: my ($namespace,$storearr,$udomain,$uname)=@_;
1793: my $items='';
1794: foreach (@$storearr) {
1795: $items.=escape($_).'&';
1796: }
1797: $items=~s/\&$//;
1798: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1799: if (!$uname) { $uname=$ENV{'user.name'}; }
1800: my $uhome=&homeserver($uname,$udomain);
1801:
1802: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1803: my @pairs=split(/\&/,$rep);
1804: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
1805: return @pairs;
1806: }
1807: my %returnhash=();
1808: my $i=0;
1809: foreach (@$storearr) {
1810: $returnhash{$_}=unescape($pairs[$i]);
1811: $i++;
1812: }
1813: return %returnhash;
1814: }
1815:
1816: # --------------------------------------------------------------- del interface
1817:
1818: sub del {
1819: my ($namespace,$storearr,$udomain,$uname)=@_;
1820: my $items='';
1821: foreach (@$storearr) {
1822: $items.=escape($_).'&';
1823: }
1824: $items=~s/\&$//;
1825: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1826: if (!$uname) { $uname=$ENV{'user.name'}; }
1827: my $uhome=&homeserver($uname,$udomain);
1828:
1829: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1830: }
1831:
1832: # -------------------------------------------------------------- dump interface
1833:
1834: sub dump {
1835: my ($namespace,$udomain,$uname,$regexp)=@_;
1836: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1837: if (!$uname) { $uname=$ENV{'user.name'}; }
1838: my $uhome=&homeserver($uname,$udomain);
1839: if ($regexp) {
1840: $regexp=&escape($regexp);
1841: } else {
1842: $regexp='.';
1843: }
1844: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1845: my @pairs=split(/\&/,$rep);
1846: my %returnhash=();
1847: foreach (@pairs) {
1848: my ($key,$value)=split(/=/,$_);
1849: $returnhash{unescape($key)}=unescape($value);
1850: }
1851: return %returnhash;
1852: }
1853:
1854: # --------------------------------------------------------------- currentdump
1855: sub currentdump {
1856: my ($courseid,$sdom,$sname)=@_;
1857: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1858: $sdom = $ENV{'user.domain'} if (! defined($sdom));
1859: $sname = $ENV{'user.name'} if (! defined($sname));
1860: my $uhome = &homeserver($sname,$sdom);
1861: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
1862: return if ($rep =~ /^(error:|no_such_host)/);
1863: #
1864: my %returnhash=();
1865: #
1866: if ($rep eq "unknown_cmd") {
1867: # an old lond will not know currentdump
1868: # Do a dump and make it look like a currentdump
1869: my @tmp = &dump($courseid,$sdom,$sname,'.');
1870: return if ($tmp[0] =~ /^(error:|no_such_host)/);
1871: my %hash = @tmp;
1872: @tmp=();
1873: # Code ripped from lond, essentially. The only difference
1874: # here is the unescaping done by lonnet::dump(). Conceivably
1875: # we might run in to problems with parameter names =~ /^v\./
1876: while (my ($key,$value) = each(%hash)) {
1877: my ($v,$symb,$param) = split(/:/,$key);
1878: next if ($v eq 'version' || $symb eq 'keys');
1879: next if (exists($returnhash{$symb}) &&
1880: exists($returnhash{$symb}->{$param}) &&
1881: $returnhash{$symb}->{'v.'.$param} > $v);
1882: $returnhash{$symb}->{$param}=$value;
1883: $returnhash{$symb}->{'v.'.$param}=$v;
1884: }
1885: #
1886: # Remove all of the keys in the hashes which keep track of
1887: # the version of the parameter.
1888: while (my ($symb,$param_hash) = each(%returnhash)) {
1889: # use a foreach because we are going to delete from the hash.
1890: foreach my $key (keys(%$param_hash)) {
1891: delete($param_hash->{$key}) if ($key =~ /^v\./);
1892: }
1893: }
1894: } else {
1895: my @pairs=split(/\&/,$rep);
1896: foreach (@pairs) {
1897: my ($key,$value)=split(/=/,$_);
1898: my ($symb,$param) = split(/:/,$key);
1899: $returnhash{&unescape($symb)}->{&unescape($param)} =
1900: &unescape($value);
1901: }
1902: }
1903: return %returnhash;
1904: }
1905:
1906: # --------------------------------------------------------------- put interface
1907:
1908: sub put {
1909: my ($namespace,$storehash,$udomain,$uname)=@_;
1910: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1911: if (!$uname) { $uname=$ENV{'user.name'}; }
1912: my $uhome=&homeserver($uname,$udomain);
1913: my $items='';
1914: foreach (keys %$storehash) {
1915: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1916: }
1917: $items=~s/\&$//;
1918: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1919: }
1920:
1921: # ------------------------------------------------------ critical put interface
1922:
1923: sub cput {
1924: my ($namespace,$storehash,$udomain,$uname)=@_;
1925: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1926: if (!$uname) { $uname=$ENV{'user.name'}; }
1927: my $uhome=&homeserver($uname,$udomain);
1928: my $items='';
1929: foreach (keys %$storehash) {
1930: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1931: }
1932: $items=~s/\&$//;
1933: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1934: }
1935:
1936: # -------------------------------------------------------------- eget interface
1937:
1938: sub eget {
1939: my ($namespace,$storearr,$udomain,$uname)=@_;
1940: my $items='';
1941: foreach (@$storearr) {
1942: $items.=escape($_).'&';
1943: }
1944: $items=~s/\&$//;
1945: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1946: if (!$uname) { $uname=$ENV{'user.name'}; }
1947: my $uhome=&homeserver($uname,$udomain);
1948: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1949: my @pairs=split(/\&/,$rep);
1950: my %returnhash=();
1951: my $i=0;
1952: foreach (@$storearr) {
1953: $returnhash{$_}=unescape($pairs[$i]);
1954: $i++;
1955: }
1956: return %returnhash;
1957: }
1958:
1959: # ---------------------------------------------- Custom access rule evaluation
1960:
1961: sub customaccess {
1962: my ($priv,$uri)=@_;
1963: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
1964: $urealm=~s/^\W//;
1965: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
1966: my $access=0;
1967: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
1968: my ($effect,$realm,$role)=split(/\:/,$_);
1969: if ($role) {
1970: if ($role ne $urole) { next; }
1971: }
1972: foreach (split(/\s*\,\s*/,$realm)) {
1973: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
1974: if ($tdom) {
1975: if ($tdom ne $udom) { next; }
1976: }
1977: if ($tcrs) {
1978: if ($tcrs ne $ucrs) { next; }
1979: }
1980: if ($tsec) {
1981: if ($tsec ne $usec) { next; }
1982: }
1983: $access=($effect eq 'allow');
1984: last;
1985: }
1986: }
1987: return $access;
1988: }
1989:
1990: # ------------------------------------------------- Check for a user privilege
1991:
1992: sub allowed {
1993: my ($priv,$uri)=@_;
1994:
1995: my $orguri=$uri;
1996: $uri=&declutter($uri);
1997:
1998: # Free bre access to adm and meta resources
1999:
2000: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2001: return 'F';
2002: }
2003:
2004: # Free bre to public access
2005:
2006: if ($priv eq 'bre') {
2007: my $copyright=&metadata($uri,'copyright');
2008: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2009: return 'F';
2010: }
2011: if ($copyright eq 'priv') {
2012: $uri=~/([^\/]+)\/([^\/]+)\//;
2013: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2014: return '';
2015: }
2016: }
2017: if ($copyright eq 'domain') {
2018: $uri=~/([^\/]+)\/([^\/]+)\//;
2019: unless (($ENV{'user.domain'} eq $1) ||
2020: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2021: return '';
2022: }
2023: }
2024: if ($ENV{'request.role'}=~ /li\.\//) {
2025: # Library role, so allow browsing of resources in this domain.
2026: return 'F';
2027: }
2028: if ($copyright eq 'custom') {
2029: unless (&customaccess($priv,$uri)) { return ''; }
2030: }
2031: }
2032: # Domain coordinator is trying to create a course
2033: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2034: # uri is the requested domain in this case.
2035: # comparison to 'request.role.domain' shows if the user has selected
2036: # a role of dc for the domain in question.
2037: return 'F' if ($uri eq $ENV{'request.role.domain'});
2038: }
2039:
2040: my $thisallowed='';
2041: my $statecond=0;
2042: my $courseprivid='';
2043:
2044: # Course
2045:
2046: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
2047: $thisallowed.=$1;
2048: }
2049:
2050: # Domain
2051:
2052: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2053: =~/$priv\&([^\:]*)/) {
2054: $thisallowed.=$1;
2055: }
2056:
2057: # Course: uri itself is a course
2058: my $courseuri=$uri;
2059: $courseuri=~s/\_(\d)/\/$1/;
2060: $courseuri=~s/^([^\/])/\/$1/;
2061:
2062: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2063: =~/$priv\&([^\:]*)/) {
2064: $thisallowed.=$1;
2065: }
2066:
2067: # URI is an uploaded document for this course
2068:
2069: if (($priv eq 'bre') &&
2070: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2071: return 'F';
2072: }
2073: # Full access at system, domain or course-wide level? Exit.
2074:
2075: if ($thisallowed=~/F/) {
2076: return 'F';
2077: }
2078:
2079: # If this is generating or modifying users, exit with special codes
2080:
2081: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
2082: return $thisallowed;
2083: }
2084: #
2085: # Gathered so far: system, domain and course wide privileges
2086: #
2087: # Course: See if uri or referer is an individual resource that is part of
2088: # the course
2089:
2090: if ($ENV{'request.course.id'}) {
2091:
2092: $courseprivid=$ENV{'request.course.id'};
2093: if ($ENV{'request.course.sec'}) {
2094: $courseprivid.='/'.$ENV{'request.course.sec'};
2095: }
2096: $courseprivid=~s/\_/\//;
2097: my $checkreferer=1;
2098: my ($match,$cond)=&is_on_map($uri);
2099: if ($match) {
2100: $statecond=$cond;
2101: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2102: =~/$priv\&([^\:]*)/) {
2103: $thisallowed.=$1;
2104: $checkreferer=0;
2105: }
2106: }
2107:
2108: if ($checkreferer) {
2109: my $refuri=$ENV{'httpref.'.$orguri};
2110: unless ($refuri) {
2111: foreach (keys %ENV) {
2112: if ($_=~/^httpref\..*\*/) {
2113: my $pattern=$_;
2114: $pattern=~s/^httpref\.\/res\///;
2115: $pattern=~s/\*/\[\^\/\]\+/g;
2116: $pattern=~s/\//\\\//g;
2117: if ($orguri=~/$pattern/) {
2118: $refuri=$ENV{$_};
2119: }
2120: }
2121: }
2122: }
2123:
2124: if ($refuri) {
2125: $refuri=&declutter($refuri);
2126: my ($match,$cond)=&is_on_map($refuri);
2127: if ($match) {
2128: my $refstatecond=$cond;
2129: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2130: =~/$priv\&([^\:]*)/) {
2131: $thisallowed.=$1;
2132: $uri=$refuri;
2133: $statecond=$refstatecond;
2134: }
2135: }
2136: }
2137: }
2138: }
2139:
2140: #
2141: # Gathered now: all privileges that could apply, and condition number
2142: #
2143: #
2144: # Full or no access?
2145: #
2146:
2147: if ($thisallowed=~/F/) {
2148: return 'F';
2149: }
2150:
2151: unless ($thisallowed) {
2152: return '';
2153: }
2154:
2155: # Restrictions exist, deal with them
2156: #
2157: # C:according to course preferences
2158: # R:according to resource settings
2159: # L:unless locked
2160: # X:according to user session state
2161: #
2162:
2163: # Possibly locked functionality, check all courses
2164: # Locks might take effect only after 10 minutes cache expiration for other
2165: # courses, and 2 minutes for current course
2166:
2167: my $envkey;
2168: if ($thisallowed=~/L/) {
2169: foreach $envkey (keys %ENV) {
2170: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2171: my $courseid=$2;
2172: my $roleid=$1.'.'.$2;
2173: $courseid=~s/^\///;
2174: my $expiretime=600;
2175: if ($ENV{'request.role'} eq $roleid) {
2176: $expiretime=120;
2177: }
2178: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2179: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2180: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2181: &coursedescription($courseid);
2182: }
2183: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2184: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2185: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2186: &log($ENV{'user.domain'},$ENV{'user.name'},
2187: $ENV{'user.home'},
2188: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2189: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2190: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2191: return '';
2192: }
2193: }
2194: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2195: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2196: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2197: &log($ENV{'user.domain'},$ENV{'user.name'},
2198: $ENV{'user.home'},
2199: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2200: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2201: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2202: return '';
2203: }
2204: }
2205: }
2206: }
2207: }
2208:
2209: #
2210: # Rest of the restrictions depend on selected course
2211: #
2212:
2213: unless ($ENV{'request.course.id'}) {
2214: return '1';
2215: }
2216:
2217: #
2218: # Now user is definitely in a course
2219: #
2220:
2221:
2222: # Course preferences
2223:
2224: if ($thisallowed=~/C/) {
2225: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2226: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2227: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2228: =~/$rolecode/) {
2229: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2230: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2231: $ENV{'request.course.id'});
2232: return '';
2233: }
2234:
2235: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2236: =~/$unamedom/) {
2237: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2238: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2239: $ENV{'request.course.id'});
2240: return '';
2241: }
2242: }
2243:
2244: # Resource preferences
2245:
2246: if ($thisallowed=~/R/) {
2247: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2248: if (&metadata($uri,'roledeny')=~/$rolecode/) {
2249: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2250: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2251: return '';
2252: }
2253: }
2254:
2255: # Restricted by state or randomout?
2256:
2257: if ($thisallowed=~/X/) {
2258: if ($ENV{'acc.randomout'}) {
2259: my $symb=&symbread($uri,1);
2260: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2261: return '';
2262: }
2263: }
2264: if (&condval($statecond)) {
2265: return '2';
2266: } else {
2267: return '';
2268: }
2269: }
2270:
2271: return 'F';
2272: }
2273:
2274: # --------------------------------------------------- Is a resource on the map?
2275:
2276: sub is_on_map {
2277: my $uri=&declutter(shift);
2278: my @uriparts=split(/\//,$uri);
2279: my $filename=$uriparts[$#uriparts];
2280: my $pathname=$uri;
2281: $pathname=~s|/\Q$filename\E$||;
2282: $pathname=~s/^adm\/wrapper\///;
2283: #Trying to find the conditional for the file
2284: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2285: /\&\Q$filename\E\:([\d\|]+)\&/);
2286: if ($match) {
2287: return (1,$1);
2288: } else {
2289: return (0,0);
2290: }
2291: }
2292:
2293: # ----------------------------------------------------------------- Define Role
2294:
2295: sub definerole {
2296: if (allowed('mcr','/')) {
2297: my ($rolename,$sysrole,$domrole,$courole)=@_;
2298: foreach (split('/',$sysrole)) {
2299: my ($crole,$cqual)=split(/\&/,$_);
2300: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2301: if ($pr{'cr:s'}=~/$crole\&/) {
2302: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2303: return "refused:s:$crole&$cqual";
2304: }
2305: }
2306: }
2307: foreach (split('/',$domrole)) {
2308: my ($crole,$cqual)=split(/\&/,$_);
2309: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2310: if ($pr{'cr:d'}=~/$crole\&/) {
2311: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2312: return "refused:d:$crole&$cqual";
2313: }
2314: }
2315: }
2316: foreach (split('/',$courole)) {
2317: my ($crole,$cqual)=split(/\&/,$_);
2318: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2319: if ($pr{'cr:c'}=~/$crole\&/) {
2320: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2321: return "refused:c:$crole&$cqual";
2322: }
2323: }
2324: }
2325: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2326: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2327: "rolesdef_$rolename=".
2328: escape($sysrole.'_'.$domrole.'_'.$courole);
2329: return reply($command,$ENV{'user.home'});
2330: } else {
2331: return 'refused';
2332: }
2333: }
2334:
2335: # ---------------- Make a metadata query against the network of library servers
2336:
2337: sub metadata_query {
2338: my ($query,$custom,$customshow,$server_array)=@_;
2339: my %rhash;
2340: my @server_list = (defined($server_array) ? @$server_array
2341: : keys(%libserv) );
2342: for my $server (@server_list) {
2343: unless ($custom or $customshow) {
2344: my $reply=&reply("querysend:".&escape($query),$server);
2345: $rhash{$server}=$reply;
2346: }
2347: else {
2348: my $reply=&reply("querysend:".&escape($query).':'.
2349: &escape($custom).':'.&escape($customshow),
2350: $server);
2351: $rhash{$server}=$reply;
2352: }
2353: }
2354: return \%rhash;
2355: }
2356:
2357: # ----------------------------------------- Send log queries and wait for reply
2358:
2359: sub log_query {
2360: my ($uname,$udom,$query,%filters)=@_;
2361: my $uhome=&homeserver($uname,$udom);
2362: if ($uhome eq 'no_host') { return 'error: no_host'; }
2363: my $uhost=$hostname{$uhome};
2364: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2365: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2366: $uhome);
2367: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2368: return get_query_reply($queryid);
2369: }
2370:
2371: sub get_query_reply {
2372: my $queryid=shift;
2373: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2374: my $reply='';
2375: for (1..100) {
2376: sleep 2;
2377: if (-e $replyfile.'.end') {
2378: if (my $fh=Apache::File->new($replyfile)) {
2379: $reply.=<$fh>;
2380: $fh->close;
2381: } else { return 'error: reply_file_error'; }
2382: return &unescape($reply);
2383: }
2384: }
2385: return 'timeout:'.$queryid;
2386: }
2387:
2388: sub courselog_query {
2389: #
2390: # possible filters:
2391: # url: url or symb
2392: # username
2393: # domain
2394: # action: view, submit, grade
2395: # start: timestamp
2396: # end: timestamp
2397: #
2398: my (%filters)=@_;
2399: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2400: if ($filters{'url'}) {
2401: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2402: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2403: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2404: }
2405: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2406: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2407: return &log_query($cname,$cdom,'courselog',%filters);
2408: }
2409:
2410: sub userlog_query {
2411: my ($uname,$udom,%filters)=@_;
2412: return &log_query($uname,$udom,'userlog',%filters);
2413: }
2414:
2415: # ------------------------------------------------------------------ Plain Text
2416:
2417: sub plaintext {
2418: my $short=shift;
2419: return $prp{$short};
2420: }
2421:
2422: # ----------------------------------------------------------------- Assign Role
2423:
2424: sub assignrole {
2425: my ($udom,$uname,$url,$role,$end,$start)=@_;
2426: my $mrole;
2427: if ($role =~ /^cr\//) {
2428: unless (&allowed('ccr',$url)) {
2429: &logthis('Refused custom assignrole: '.
2430: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2431: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2432: return 'refused';
2433: }
2434: $mrole='cr';
2435: } else {
2436: my $cwosec=$url;
2437: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2438: unless (&allowed('c'.$role,$cwosec)) {
2439: &logthis('Refused assignrole: '.
2440: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2441: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2442: return 'refused';
2443: }
2444: $mrole=$role;
2445: }
2446: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2447: "$udom:$uname:$url".'_'."$mrole=$role";
2448: if ($end) { $command.='_'.$end; }
2449: if ($start) {
2450: if ($end) {
2451: $command.='_'.$start;
2452: } else {
2453: $command.='_0_'.$start;
2454: }
2455: }
2456: return &reply($command,&homeserver($uname,$udom));
2457: }
2458:
2459: # -------------------------------------------------- Modify user authentication
2460: # Overrides without validation
2461:
2462: sub modifyuserauth {
2463: my ($udom,$uname,$umode,$upass)=@_;
2464: my $uhome=&homeserver($uname,$udom);
2465: unless (&allowed('mau',$udom)) { return 'refused'; }
2466: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2467: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2468: ' in domain '.$ENV{'request.role.domain'});
2469: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2470: &escape($upass),$uhome);
2471: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2472: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2473: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2474: &log($udom,,$uname,$uhome,
2475: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2476: $ENV{'user.name'}.', '.$umode.
2477: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2478: unless ($reply eq 'ok') {
2479: &logthis('Authentication mode error: '.$reply);
2480: return 'error: '.$reply;
2481: }
2482: return 'ok';
2483: }
2484:
2485: # --------------------------------------------------------------- Modify a user
2486:
2487: sub modifyuser {
2488: my ($udom, $uname, $uid,
2489: $umode, $upass, $first,
2490: $middle, $last, $gene,
2491: $forceid, $desiredhome)=@_;
2492: $udom=~s/\W//g;
2493: $uname=~s/\W//g;
2494: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2495: $umode.', '.$first.', '.$middle.', '.
2496: $last.', '.$gene.'(forceid: '.$forceid.')'.
2497: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2498: ' desiredhome not specified').
2499: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2500: ' in domain '.$ENV{'request.role.domain'});
2501: my $uhome=&homeserver($uname,$udom,'true');
2502: # ----------------------------------------------------------------- Create User
2503: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
2504: my $unhome='';
2505: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2506: $unhome = $desiredhome;
2507: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2508: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2509: } else { # load balancing routine for determining $unhome
2510: my $tryserver;
2511: my $loadm=10000000;
2512: foreach $tryserver (keys %libserv) {
2513: if ($hostdom{$tryserver} eq $udom) {
2514: my $answer=reply('load',$tryserver);
2515: if (($answer=~/\d+/) && ($answer<$loadm)) {
2516: $loadm=$answer;
2517: $unhome=$tryserver;
2518: }
2519: }
2520: }
2521: }
2522: if (($unhome eq '') || ($unhome eq 'no_host')) {
2523: return 'error: unable to find a home server for '.$uname.
2524: ' in domain '.$udom;
2525: }
2526: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2527: &escape($upass),$unhome);
2528: unless ($reply eq 'ok') {
2529: return 'error: '.$reply;
2530: }
2531: $uhome=&homeserver($uname,$udom,'true');
2532: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2533: return 'error: verify home';
2534: }
2535: } # End of creation of new user
2536: # ---------------------------------------------------------------------- Add ID
2537: if ($uid) {
2538: $uid=~tr/A-Z/a-z/;
2539: my %uidhash=&idrget($udom,$uname);
2540: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2541: && (!$forceid)) {
2542: unless ($uid eq $uidhash{$uname}) {
2543: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2544: }
2545: } else {
2546: &idput($udom,($uname => $uid));
2547: }
2548: }
2549: # -------------------------------------------------------------- Add names, etc
2550: my @tmp=&get('environment',
2551: ['firstname','middlename','lastname','generation'],
2552: $udom,$uname);
2553: my %names;
2554: if ($tmp[0] =~ m/^error:.*/) {
2555: %names=();
2556: } else {
2557: %names = @tmp;
2558: }
2559: if ($first) { $names{'firstname'} = $first; }
2560: if ($middle) { $names{'middlename'} = $middle; }
2561: if ($last) { $names{'lastname'} = $last; }
2562: if ($gene) { $names{'generation'} = $gene; }
2563: my $reply = &put('environment', \%names, $udom,$uname);
2564: if ($reply ne 'ok') { return 'error: '.$reply; }
2565: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2566: $umode.', '.$first.', '.$middle.', '.
2567: $last.', '.$gene.' by '.
2568: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2569: return 'ok';
2570: }
2571:
2572: # -------------------------------------------------------------- Modify student
2573:
2574: sub modifystudent {
2575: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2576: $end,$start,$forceid,$desiredhome)=@_;
2577: my $cid='';
2578: unless ($cid=$ENV{'request.course.id'}) {
2579: return 'not_in_class';
2580: }
2581: # --------------------------------------------------------------- Make the user
2582: my $reply=&modifyuser
2583: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2584: $desiredhome);
2585: unless ($reply eq 'ok') { return $reply; }
2586: # This will cause &modify_student_enrollment to get the uid from the
2587: # students environment
2588: $uid = undef if (!$forceid);
2589: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
2590: $last,$gene,$usec,$end,$start);
2591: return $reply;
2592: }
2593:
2594: sub modify_student_enrollment {
2595: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
2596: # Get the course id from the environment
2597: my $cid='';
2598: unless ($cid=$ENV{'request.course.id'}) {
2599: return 'not_in_class';
2600: }
2601: # Make sure the user exists
2602: my $uhome=&homeserver($uname,$udom);
2603: if (($uhome eq '') || ($uhome eq 'no_host')) {
2604: return 'error: no such user';
2605: }
2606: #
2607: # Get student data if we were not given enough information
2608: if (!defined($first) || $first eq '' ||
2609: !defined($last) || $last eq '' ||
2610: !defined($uid) || $uid eq '' ||
2611: !defined($middle) || $middle eq '' ||
2612: !defined($gene) || $gene eq '') {
2613: # They did not supply us with enough data to enroll the student, so
2614: # we need to pick up more information.
2615: my %tmp = &get('environment',
2616: ['firstname','middlename','lastname', 'generation','id']
2617: ,$udom,$uname);
2618:
2619: foreach (keys(%tmp)) {
2620: &logthis("key $_ = ".$tmp{$_});
2621: }
2622: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
2623: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
2624: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
2625: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
2626: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
2627: }
2628: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
2629: $first,$middle);
2630: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2631: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2632: &escape($uname.':'.$udom).'='.
2633: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
2634: $ENV{'course.'.$cid.'.home'});
2635: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2636: return 'error: '.$reply;
2637: }
2638: # Add student role to user
2639: my $uurl='/'.$cid;
2640: $uurl=~s/\_/\//g;
2641: if ($usec) {
2642: $uurl.='/'.$usec;
2643: }
2644: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2645: }
2646:
2647: # ------------------------------------------------- Write to course preferences
2648:
2649: sub writecoursepref {
2650: my ($courseid,%prefs)=@_;
2651: $courseid=~s/^\///;
2652: $courseid=~s/\_/\//g;
2653: my ($cdomain,$cnum)=split(/\//,$courseid);
2654: my $chome=homeserver($cnum,$cdomain);
2655: if (($chome eq '') || ($chome eq 'no_host')) {
2656: return 'error: no such course';
2657: }
2658: my $cstring='';
2659: foreach (keys %prefs) {
2660: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2661: }
2662: $cstring=~s/\&$//;
2663: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2664: }
2665:
2666: # ---------------------------------------------------------- Make/modify course
2667:
2668: sub createcourse {
2669: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
2670: $url=&declutter($url);
2671: my $cid='';
2672: unless (&allowed('ccc',$udom)) {
2673: return 'refused';
2674: }
2675: # ------------------------------------------------------------------- Create ID
2676: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2677: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2678: # ----------------------------------------------- Make sure that does not exist
2679: my $uhome=&homeserver($uname,$udom,'true');
2680: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2681: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2682: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2683: $uhome=&homeserver($uname,$udom,'true');
2684: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2685: return 'error: unable to generate unique course-ID';
2686: }
2687: }
2688: # ------------------------------------------------ Check supplied server name
2689: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
2690: if (! exists($libserv{$course_server})) {
2691: return 'error:bad server name '.$course_server;
2692: }
2693: # ------------------------------------------------------------- Make the course
2694: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2695: $course_server);
2696: unless ($reply eq 'ok') { return 'error: '.$reply; }
2697: $uhome=&homeserver($uname,$udom,'true');
2698: if (($uhome eq '') || ($uhome eq 'no_host')) {
2699: return 'error: no such course';
2700: }
2701: # ----------------------------------------------------------------- Course made
2702: my $topurl=$url;
2703: unless ($nonstandard) {
2704: # ------------------------------------------ For standard courses, make top url
2705: my $mapurl=&clutter($url);
2706: if ($mapurl eq '/res/') { $mapurl=''; }
2707: $ENV{'form.initmap'}=(<<ENDINITMAP);
2708: <map>
2709: <resource id="1" type="start"></resource>
2710: <resource id="2" src="$mapurl"></resource>
2711: <resource id="3" type="finish"></resource>
2712: <link index="1" from="1" to="2"></link>
2713: <link index="2" from="2" to="3"></link>
2714: </map>
2715: ENDINITMAP
2716: $topurl=&declutter(
2717: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
2718: );
2719: }
2720: # ----------------------------------------------------------- Write preferences
2721: &writecoursepref($udom.'_'.$uname,
2722: ('description' => $description,
2723: 'url' => $topurl));
2724: return '/'.$udom.'/'.$uname;
2725: }
2726:
2727: # ---------------------------------------------------------- Assign Custom Role
2728:
2729: sub assigncustomrole {
2730: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2731: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2732: $end,$start);
2733: }
2734:
2735: # ----------------------------------------------------------------- Revoke Role
2736:
2737: sub revokerole {
2738: my ($udom,$uname,$url,$role)=@_;
2739: my $now=time;
2740: return &assignrole($udom,$uname,$url,$role,$now);
2741: }
2742:
2743: # ---------------------------------------------------------- Revoke Custom Role
2744:
2745: sub revokecustomrole {
2746: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2747: my $now=time;
2748: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2749: }
2750:
2751: # ------------------------------------------------------------ Directory lister
2752:
2753: sub dirlist {
2754: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2755:
2756: $uri=~s/^\///;
2757: $uri=~s/\/$//;
2758: my ($udom, $uname);
2759: (undef,$udom,$uname)=split(/\//,$uri);
2760: if(defined($userdomain)) {
2761: $udom = $userdomain;
2762: }
2763: if(defined($username)) {
2764: $uname = $username;
2765: }
2766:
2767: my $dirRoot = $perlvar{'lonDocRoot'};
2768: if(defined($alternateDirectoryRoot)) {
2769: $dirRoot = $alternateDirectoryRoot;
2770: $dirRoot =~ s/\/$//;
2771: }
2772:
2773: if($udom) {
2774: if($uname) {
2775: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2776: homeserver($uname,$udom));
2777: return split(/:/,$listing);
2778: } elsif(!defined($alternateDirectoryRoot)) {
2779: my $tryserver;
2780: my %allusers=();
2781: foreach $tryserver (keys %libserv) {
2782: if($hostdom{$tryserver} eq $udom) {
2783: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2784: $udom, $tryserver);
2785: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2786: && ($listing ne 'con_lost')) {
2787: foreach (split(/:/,$listing)) {
2788: my ($entry,@stat)=split(/&/,$_);
2789: $allusers{$entry}=1;
2790: }
2791: }
2792: }
2793: }
2794: my $alluserstr='';
2795: foreach (sort keys %allusers) {
2796: $alluserstr.=$_.'&user:';
2797: }
2798: $alluserstr=~s/:$//;
2799: return split(/:/,$alluserstr);
2800: } else {
2801: my @emptyResults = ();
2802: push(@emptyResults, 'missing user name');
2803: return split(':',@emptyResults);
2804: }
2805: } elsif(!defined($alternateDirectoryRoot)) {
2806: my $tryserver;
2807: my %alldom=();
2808: foreach $tryserver (keys %libserv) {
2809: $alldom{$hostdom{$tryserver}}=1;
2810: }
2811: my $alldomstr='';
2812: foreach (sort keys %alldom) {
2813: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2814: }
2815: $alldomstr=~s/:$//;
2816: return split(/:/,$alldomstr);
2817: } else {
2818: my @emptyResults = ();
2819: push(@emptyResults, 'missing domain');
2820: return split(':',@emptyResults);
2821: }
2822: }
2823:
2824: # --------------------------------------------- GetFileTimestamp
2825: # This function utilizes dirlist and returns the date stamp for
2826: # when it was last modified. It will also return an error of -1
2827: # if an error occurs
2828:
2829: sub GetFileTimestamp {
2830: my ($studentDomain,$studentName,$filename,$root)=@_;
2831: $studentDomain=~s/\W//g;
2832: $studentName=~s/\W//g;
2833: my $subdir=$studentName.'__';
2834: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
2835: my $proname="$studentDomain/$subdir/$studentName";
2836: $proname .= '/'.$filename;
2837: my @dir = &Apache::lonnet::dirlist($proname, $studentDomain, $studentName,
2838: $root);
2839: my $fileStat = $dir[0];
2840: my @stats = split('&', $fileStat);
2841: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
2842: return $stats[9];
2843: } else {
2844: return -1;
2845: }
2846: }
2847:
2848: # -------------------------------------------------------- Value of a Condition
2849:
2850: sub directcondval {
2851: my $number=shift;
2852: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2853: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2854: } else {
2855: return 2;
2856: }
2857: }
2858:
2859: sub condval {
2860: my $condidx=shift;
2861: my $result=0;
2862: my $allpathcond='';
2863: foreach (split(/\|/,$condidx)) {
2864: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2865: $allpathcond.=
2866: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2867: }
2868: }
2869: $allpathcond=~s/\|$//;
2870: if ($ENV{'request.course.id'}) {
2871: if ($allpathcond) {
2872: my $operand='|';
2873: my @stack;
2874: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
2875: if ($_ eq '(') {
2876: push @stack,($operand,$result)
2877: } elsif ($_ eq ')') {
2878: my $before=pop @stack;
2879: if (pop @stack eq '&') {
2880: $result=$result>$before?$before:$result;
2881: } else {
2882: $result=$result>$before?$result:$before;
2883: }
2884: } elsif (($_ eq '&') || ($_ eq '|')) {
2885: $operand=$_;
2886: } else {
2887: my $new=directcondval($_);
2888: if ($operand eq '&') {
2889: $result=$result>$new?$new:$result;
2890: } else {
2891: $result=$result>$new?$result:$new;
2892: }
2893: }
2894: }
2895: }
2896: }
2897: return $result;
2898: }
2899:
2900: # ---------------------------------------------------- Devalidate courseresdata
2901:
2902: sub devalidatecourseresdata {
2903: my ($coursenum,$coursedomain)=@_;
2904: my $hashid=$coursenum.':'.$coursedomain;
2905: delete $courseresdatacache{$hashid.'.time'};
2906: }
2907:
2908: # --------------------------------------------------- Course Resourcedata Query
2909:
2910: sub courseresdata {
2911: my ($coursenum,$coursedomain,@which)=@_;
2912: my $coursehom=&homeserver($coursenum,$coursedomain);
2913: my $hashid=$coursenum.':'.$coursedomain;
2914: my $dodump=0;
2915: if (!defined($courseresdatacache{$hashid.'.time'})) {
2916: $dodump=1;
2917: } else {
2918: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
2919: }
2920: if ($dodump) {
2921: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
2922: my ($tmp) = keys(%dumpreply);
2923: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
2924: $courseresdatacache{$hashid.'.time'}=time;
2925: $courseresdatacache{$hashid}=\%dumpreply;
2926: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
2927: return $tmp;
2928: }
2929: }
2930: foreach my $item (@which) {
2931: if (defined($courseresdatacache{$hashid}->{$item})) {
2932: return $courseresdatacache{$hashid}->{$item};
2933: }
2934: }
2935: return undef;
2936: }
2937:
2938: # --------------------------------------------------------- Value of a Variable
2939:
2940: sub EXT {
2941: my ($varname,$symbparm,$udom,$uname,)=@_;
2942:
2943: unless ($varname) { return ''; }
2944: #get real user name/domain, courseid and symb
2945: my $courseid;
2946: if (!($uname && $udom)) {
2947: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2948: if (!$symbparm) { $symbparm=$cursymb; }
2949: } else {
2950: $courseid=$ENV{'request.course.id'};
2951: }
2952: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2953: my $rest;
2954: if (defined($therest[0])) {
2955: $rest=join('.',@therest);
2956: } else {
2957: $rest='';
2958: }
2959:
2960: my $qualifierrest=$qualifier;
2961: if ($rest) { $qualifierrest.='.'.$rest; }
2962: my $spacequalifierrest=$space;
2963: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2964: if ($realm eq 'user') {
2965: # --------------------------------------------------------------- user.resource
2966: if ($space eq 'resource') {
2967: if (defined($Apache::lonhomework::parsing_a_problem)) {
2968: return $Apache::lonhomework::history{$qualifierrest};
2969: } else {
2970: my %restored=&restore($symbparm,$courseid,$udom,$uname);
2971: return $restored{$qualifierrest};
2972: }
2973: # ----------------------------------------------------------------- user.access
2974: } elsif ($space eq 'access') {
2975: # FIXME - not supporting calls for a specific user
2976: return &allowed($qualifier,$rest);
2977: # ------------------------------------------ user.preferences, user.environment
2978: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2979: if (($uname eq $ENV{'user.name'}) &&
2980: ($udom eq $ENV{'user.domain'})) {
2981: return $ENV{join('.',('environment',$qualifierrest))};
2982: } else {
2983: my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
2984: return $returnhash{$qualifierrest};
2985: }
2986: # ----------------------------------------------------------------- user.course
2987: } elsif ($space eq 'course') {
2988: # FIXME - not supporting calls for a specific user
2989: return $ENV{join('.',('request.course',$qualifier))};
2990: # ------------------------------------------------------------------- user.role
2991: } elsif ($space eq 'role') {
2992: # FIXME - not supporting calls for a specific user
2993: my ($role,$where)=split(/\./,$ENV{'request.role'});
2994: if ($qualifier eq 'value') {
2995: return $role;
2996: } elsif ($qualifier eq 'extent') {
2997: return $where;
2998: }
2999: # ----------------------------------------------------------------- user.domain
3000: } elsif ($space eq 'domain') {
3001: return $udom;
3002: # ------------------------------------------------------------------- user.name
3003: } elsif ($space eq 'name') {
3004: return $uname;
3005: # ---------------------------------------------------- Any other user namespace
3006: } else {
3007: my %reply=&get($space,[$qualifierrest],$udom,$uname);
3008: return $reply{$qualifierrest};
3009: }
3010: } elsif ($realm eq 'query') {
3011: # ---------------------------------------------- pull stuff out of query string
3012: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
3013: return $ENV{'form.'.$space};
3014: } elsif ($realm eq 'request') {
3015: # ------------------------------------------------------------- request.browser
3016: if ($space eq 'browser') {
3017: return $ENV{'browser.'.$qualifier};
3018: # ------------------------------------------------------------ request.filename
3019: } else {
3020: return $ENV{'request.'.$spacequalifierrest};
3021: }
3022: } elsif ($realm eq 'course') {
3023: # ---------------------------------------------------------- course.description
3024: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
3025: } elsif ($realm eq 'resource') {
3026:
3027: if ($courseid eq $ENV{'request.course.id'}) {
3028:
3029: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
3030:
3031: # ----------------------------------------------------- Cascading lookup scheme
3032: if (!$symbparm) { $symbparm=&symbread(); }
3033: my $symbp=$symbparm;
3034: my $mapp=(split(/\_\_\_/,$symbp))[0];
3035:
3036: my $symbparm=$symbp.'.'.$spacequalifierrest;
3037: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3038:
3039: my $section;
3040: if (($ENV{'user.name'} eq $uname) &&
3041: ($ENV{'user.domain'} eq $udom)) {
3042: $section=$ENV{'request.course.sec'};
3043: } else {
3044: $section=&usection($udom,$uname,$courseid);
3045: }
3046:
3047: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3048: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3049: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3050:
3051: my $courselevel=$courseid.'.'.$spacequalifierrest;
3052: my $courselevelr=$courseid.'.'.$symbparm;
3053: my $courselevelm=$courseid.'.'.$mapparm;
3054:
3055: # ----------------------------------------------------------- first, check user
3056: #most student don't have any data set, check if there is some data
3057: #every thirty minutes
3058: if (!
3059: (exists($ENV{'cache.studentresdata'})
3060: && (($ENV{'cache.studentresdata'}+1800) > time))) {
3061: my %resourcedata=&get('resourcedata',
3062: [$courselevelr,$courselevelm,$courselevel],
3063: $udom,$uname);
3064: my ($tmp)=keys(%resourcedata);
3065: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
3066: if ($resourcedata{$courselevelr}) {
3067: return $resourcedata{$courselevelr}; }
3068: if ($resourcedata{$courselevelm}) {
3069: return $resourcedata{$courselevelm}; }
3070: if ($resourcedata{$courselevel}) {
3071: return $resourcedata{$courselevel}; }
3072: } else {
3073: if ($tmp!~/No such file/) {
3074: &logthis("<font color=blue>WARNING:".
3075: " Trying to get resource data for ".
3076: $uname." at ".$udom.": ".
3077: $tmp."</font>");
3078: } elsif ($tmp=~/error:No such file/) {
3079: $ENV{'cache.studentresdata'}=time;
3080: &appenv(('cache.studentresdata'=>
3081: $ENV{'cache.studentresdata'}));
3082: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3083: return $tmp;
3084: }
3085: }
3086: }
3087:
3088: # -------------------------------------------------------- second, check course
3089:
3090: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3091: $ENV{'course.'.$courseid.'.domain'},
3092: ($seclevelr,$seclevelm,$seclevel,
3093: $courselevelr,$courselevelm,
3094: $courselevel));
3095: if (defined($coursereply)) { return $coursereply; }
3096:
3097: # ------------------------------------------------------ third, check map parms
3098: my %parmhash=();
3099: my $thisparm='';
3100: if (tie(%parmhash,'GDBM_File',
3101: $ENV{'request.course.fn'}.'_parms.db',
3102: &GDBM_READER(),0640)) {
3103: $thisparm=$parmhash{$symbparm};
3104: untie(%parmhash);
3105: }
3106: if ($thisparm) { return $thisparm; }
3107: }
3108: # --------------------------------------------- last, look in resource metadata
3109:
3110: $spacequalifierrest=~s/\./\_/;
3111: my $filename;
3112: if (!$symbparm) { $symbparm=&symbread(); }
3113: if ($symbparm) {
3114: $filename=(split(/\_\_\_/,$symbparm))[2];
3115: } else {
3116: $filename=$ENV{'request.filename'};
3117: }
3118: my $metadata=&metadata($filename,$spacequalifierrest);
3119: if (defined($metadata)) { return $metadata; }
3120: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
3121: if (defined($metadata)) { return $metadata; }
3122:
3123: # ------------------------------------------------------------------ Cascade up
3124: unless ($space eq '0') {
3125: my @parts=split(/_/,$space);
3126: my $id=pop(@parts);
3127: my $part=join('_',@parts);
3128: if ($part eq '') { $part='0'; }
3129: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
3130: $symbparm,$udom,$uname);
3131: if (defined($partgeneral)) { return $partgeneral; }
3132: }
3133:
3134: # ---------------------------------------------------- Any other user namespace
3135: } elsif ($realm eq 'environment') {
3136: # ----------------------------------------------------------------- environment
3137: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3138: return $ENV{'environment.'.$spacequalifierrest};
3139: } else {
3140: my %returnhash=&userenvironment($udom,$uname,
3141: $spacequalifierrest);
3142: return $returnhash{$spacequalifierrest};
3143: }
3144: } elsif ($realm eq 'system') {
3145: # ----------------------------------------------------------------- system.time
3146: if ($space eq 'time') {
3147: return time;
3148: }
3149: }
3150: return '';
3151: }
3152:
3153: sub add_prefix_and_part {
3154: my ($prefix,$part)=@_;
3155: my $keyroot;
3156: if (defined($prefix) && $prefix !~ /^__/) {
3157: # prefix that has a part already
3158: $keyroot=$prefix;
3159: } elsif (defined($prefix)) {
3160: # prefix that is missing a part
3161: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3162: } else {
3163: # no prefix at all
3164: if (defined($part)) { $keyroot='_'.$part; }
3165: }
3166: return $keyroot;
3167: }
3168:
3169: # ---------------------------------------------------------------- Get metadata
3170:
3171: sub metadata {
3172: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3173:
3174: $uri=&declutter($uri);
3175: # if it is a non metadata possible uri return quickly
3176: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3177: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|)) {
3178: return '';
3179: }
3180: my $filename=$uri;
3181: $uri=~s/\.meta$//;
3182: #
3183: # Is the metadata already cached?
3184: # Look at timestamp of caching
3185: # Everything is cached by the main uri, libraries are never directly cached
3186: #
3187: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
3188: #
3189: # Is this a recursive call for a library?
3190: #
3191: if ($liburi) {
3192: $liburi=&declutter($liburi);
3193: $filename=$liburi;
3194: }
3195: my %metathesekeys=();
3196: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3197: my $metastring=&getfile(&filelocation('',&clutter($filename)));
3198: my $parser=HTML::LCParser->new(\$metastring);
3199: my $token;
3200: undef %metathesekeys;
3201: while ($token=$parser->get_token) {
3202: if ($token->[0] eq 'S') {
3203: if (defined($token->[2]->{'package'})) {
3204: #
3205: # This is a package - get package info
3206: #
3207: my $package=$token->[2]->{'package'};
3208: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3209: if (defined($token->[2]->{'id'})) {
3210: $keyroot.='_'.$token->[2]->{'id'};
3211: }
3212: if ($metacache{$uri.':packages'}) {
3213: $metacache{$uri.':packages'}.=','.$package.$keyroot;
3214: } else {
3215: $metacache{$uri.':packages'}=$package.$keyroot;
3216: }
3217: foreach (keys %packagetab) {
3218: if ($_=~/^$package\&/) {
3219: my ($pack,$name,$subp)=split(/\&/,$_);
3220: my $value=$packagetab{$_};
3221: my $part=$keyroot;
3222: $part=~s/^\_//;
3223: if ($subp eq 'display') {
3224: $value.=' [Part: '.$part.']';
3225: }
3226: my $unikey='parameter'.$keyroot.'_'.$name;
3227: if ($subp eq 'default') { $unikey='parameter_0_'.$name; }
3228: $metathesekeys{$unikey}=1;
3229: $metacache{$uri.':'.$unikey.'.part'}=$part;
3230: unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
3231: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
3232: }
3233: if (defined($metacache{$uri.':'.$unikey.'.default'})) {
3234: $metacache{$uri.':'.$unikey}=
3235: $metacache{$uri.':'.$unikey.'.default'}
3236: }
3237: }
3238: }
3239: } else {
3240: #
3241: # This is not a package - some other kind of start tag
3242: #
3243: my $entry=$token->[1];
3244: my $unikey;
3245: if ($entry eq 'import') {
3246: $unikey='';
3247: } else {
3248: $unikey=$entry;
3249: }
3250: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3251:
3252: if (defined($token->[2]->{'id'})) {
3253: $unikey.='_'.$token->[2]->{'id'};
3254: }
3255:
3256: if ($entry eq 'import') {
3257: #
3258: # Importing a library here
3259: #
3260: if ($depthcount<20) {
3261: my $location=$parser->get_text('/import');
3262: my $dir=$filename;
3263: $dir=~s|[^/]*$||;
3264: $location=&filelocation($dir,$location);
3265: foreach (sort(split(/\,/,&metadata($uri,'keys',
3266: $location,$unikey,
3267: $depthcount+1)))) {
3268: $metathesekeys{$_}=1;
3269: }
3270: }
3271: } else {
3272:
3273: if (defined($token->[2]->{'name'})) {
3274: $unikey.='_'.$token->[2]->{'name'};
3275: }
3276: $metathesekeys{$unikey}=1;
3277: foreach (@{$token->[3]}) {
3278: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
3279: }
3280: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
3281: my $default=$metacache{$uri.':'.$unikey.'.default'};
3282: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
3283: # only ws inside the tag, and not in default, so use default
3284: # as value
3285: $metacache{$uri.':'.$unikey}=$default;
3286: } else {
3287: # either something interesting inside the tag or default
3288: # uninteresting
3289: $metacache{$uri.':'.$unikey}=$internaltext;
3290: }
3291: # end of not-a-package not-a-library import
3292: }
3293: # end of not-a-package start tag
3294: }
3295: # the next is the end of "start tag"
3296: }
3297: }
3298: # are there custom rights to evaluate
3299: if ($metacache{$uri.':copyright'} eq 'custom') {
3300:
3301: #
3302: # Importing a rights file here
3303: #
3304: unless ($depthcount) {
3305: my $location=$metacache{$uri.':customdistributionfile'};
3306: my $dir=$filename;
3307: $dir=~s|[^/]*$||;
3308: $location=&filelocation($dir,$location);
3309: foreach (sort(split(/\,/,&metadata($uri,'keys',
3310: $location,'_rights',
3311: $depthcount+1)))) {
3312: $metathesekeys{$_}=1;
3313: }
3314: }
3315: }
3316: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
3317: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
3318: $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
3319: $metacache{$uri.':cachedtimestamp'}=time;
3320: # this is the end of "was not already recently cached
3321: }
3322: return $metacache{$uri.':'.$what};
3323: }
3324:
3325: sub metadata_generate_part0 {
3326: my ($metadata,$metacache,$uri) = @_;
3327: my %allnames;
3328: foreach my $metakey (sort keys %$metadata) {
3329: if ($metakey=~/^parameter\_(.*)/) {
3330: my $part=$$metacache{$uri.':'.$metakey.'.part'};
3331: my $name=$$metacache{$uri.':'.$metakey.'.name'};
3332: if (! exists($$metadata{'parameter_0_'.$name})) {
3333: $allnames{$name}=$part;
3334: }
3335: }
3336: }
3337: foreach my $name (keys(%allnames)) {
3338: $$metadata{"parameter_0_$name"}=1;
3339: my $key="$uri:parameter_0_$name";
3340: $$metacache{"$key.part"}='0';
3341: $$metacache{"$key.name"}=$name;
3342: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
3343: $allnames{$name}.'_'.$name.
3344: '.type'};
3345: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
3346: '.display'};
3347: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3348: $olddis=~s/$expr/\[Part: 0\]/;
3349: $$metacache{"$key.display"}=$olddis;
3350: }
3351: }
3352:
3353: # ------------------------------------------------- Get the title of a resource
3354:
3355: sub gettitle {
3356: my $urlsymb=shift;
3357: my $symb=&symbread($urlsymb);
3358: unless ($symb) {
3359: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3360: return &metadata($urlsymb,'title');
3361: }
3362: if ($titlecache{$symb}) { return $titlecache{$symb}; }
3363: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3364: my $title='';
3365: my %bighash;
3366: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3367: &GDBM_READER(),0640)) {
3368: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3369: $title=$bighash{'title_'.$mapid.'.'.$resid};
3370: untie %bighash;
3371: }
3372: if ($title) {
3373: $titlecache{$symb}=$title;
3374: return $title;
3375: } else {
3376: return &metadata($urlsymb,'title');
3377: }
3378: }
3379:
3380: # ------------------------------------------------- Update symbolic store links
3381:
3382: sub symblist {
3383: my ($mapname,%newhash)=@_;
3384: $mapname=declutter($mapname);
3385: my %hash;
3386: if (($ENV{'request.course.fn'}) && (%newhash)) {
3387: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3388: &GDBM_WRCREAT(),0640)) {
3389: foreach (keys %newhash) {
3390: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
3391: }
3392: if (untie(%hash)) {
3393: return 'ok';
3394: }
3395: }
3396: }
3397: return 'error';
3398: }
3399:
3400: # --------------------------------------------------------------- Verify a symb
3401:
3402: sub symbverify {
3403: my ($symb,$thisfn)=@_;
3404: $thisfn=&declutter($thisfn);
3405: # direct jump to resource in page or to a sequence - will construct own symbs
3406: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
3407: # check URL part
3408: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3409: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
3410:
3411: $symb=&symbclean($symb);
3412:
3413: my %bighash;
3414: my $okay=0;
3415: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3416: &GDBM_READER(),0640)) {
3417: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3418: unless ($ids) {
3419: $ids=$bighash{'ids_/'.$thisfn};
3420: }
3421: if ($ids) {
3422: # ------------------------------------------------------------------- Has ID(s)
3423: foreach (split(/\,/,$ids)) {
3424: my ($mapid,$resid)=split(/\./,$_);
3425: if (
3426: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
3427: eq $symb) {
3428: $okay=1;
3429: }
3430: }
3431: }
3432: untie(%bighash);
3433: }
3434: return $okay;
3435: }
3436:
3437: # --------------------------------------------------------------- Clean-up symb
3438:
3439: sub symbclean {
3440: my $symb=shift;
3441:
3442: # remove version from map
3443: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
3444:
3445: # remove version from URL
3446: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
3447:
3448: return $symb;
3449: }
3450:
3451: # ------------------------------------------------------ Return symb list entry
3452:
3453: sub symbread {
3454: my ($thisfn,$donotrecurse)=@_;
3455: # no filename provided? try from environment
3456: unless ($thisfn) {
3457: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
3458: $thisfn=$ENV{'request.filename'};
3459: }
3460: # is that filename actually a symb? Verify, clean, and return
3461: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
3462: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
3463: }
3464: $thisfn=declutter($thisfn);
3465: my %hash;
3466: my %bighash;
3467: my $syval='';
3468: if (($ENV{'request.course.fn'}) && ($thisfn)) {
3469: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3470: &GDBM_READER(),0640)) {
3471: $syval=$hash{$thisfn};
3472: untie(%hash);
3473: }
3474: # ---------------------------------------------------------- There was an entry
3475: if ($syval) {
3476: unless ($syval=~/\_\d+$/) {
3477: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
3478: &appenv('request.ambiguous' => $thisfn);
3479: return '';
3480: }
3481: $syval.=$1;
3482: }
3483: } else {
3484: # ------------------------------------------------------- Was not in symb table
3485: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3486: &GDBM_READER(),0640)) {
3487: # ---------------------------------------------- Get ID(s) for current resource
3488: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3489: unless ($ids) {
3490: $ids=$bighash{'ids_/'.$thisfn};
3491: }
3492: unless ($ids) {
3493: # alias?
3494: $ids=$bighash{'mapalias_'.$thisfn};
3495: }
3496: if ($ids) {
3497: # ------------------------------------------------------------------- Has ID(s)
3498: my @possibilities=split(/\,/,$ids);
3499: if ($#possibilities==0) {
3500: # ----------------------------------------------- There is only one possibility
3501: my ($mapid,$resid)=split(/\./,$ids);
3502: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
3503: } elsif (!$donotrecurse) {
3504: # ------------------------------------------ There is more than one possibility
3505: my $realpossible=0;
3506: foreach (@possibilities) {
3507: my $file=$bighash{'src_'.$_};
3508: if (&allowed('bre',$file)) {
3509: my ($mapid,$resid)=split(/\./,$_);
3510: if ($bighash{'map_type_'.$mapid} ne 'page') {
3511: $realpossible++;
3512: $syval=declutter($bighash{'map_id_'.$mapid}).
3513: '___'.$resid;
3514: }
3515: }
3516: }
3517: if ($realpossible!=1) { $syval=''; }
3518: } else {
3519: $syval='';
3520: }
3521: }
3522: untie(%bighash)
3523: }
3524: }
3525: if ($syval) {
3526: return &symbclean($syval.'___'.$thisfn);
3527: }
3528: }
3529: &appenv('request.ambiguous' => $thisfn);
3530: return '';
3531: }
3532:
3533: # ---------------------------------------------------------- Return random seed
3534:
3535: sub numval {
3536: my $txt=shift;
3537: $txt=~tr/A-J/0-9/;
3538: $txt=~tr/a-j/0-9/;
3539: $txt=~tr/K-T/0-9/;
3540: $txt=~tr/k-t/0-9/;
3541: $txt=~tr/U-Z/0-5/;
3542: $txt=~tr/u-z/0-5/;
3543: $txt=~s/\D//g;
3544: return int($txt);
3545: }
3546:
3547: sub rndseed {
3548: my ($symb,$courseid,$domain,$username)=@_;
3549: if (!$symb) {
3550: unless ($symb=&symbread()) { return time; }
3551: }
3552: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
3553: if (!$domain) {$domain=$ENV{'user.domain'};}
3554: if (!$username) {$username=$ENV{'user.name'};}
3555: {
3556: use integer;
3557: my $symbchck=unpack("%32C*",$symb) << 27;
3558: my $symbseed=numval($symb) << 22;
3559: my $namechck=unpack("%32C*",$username) << 17;
3560: my $nameseed=numval($username) << 12;
3561: my $domainseed=unpack("%32C*",$domain) << 7;
3562: my $courseseed=unpack("%32C*",$courseid);
3563: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
3564: #uncommenting these lines can break things!
3565: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
3566: #&Apache::lonxml::debug("rndseed :$num:$symb");
3567: return $num;
3568: }
3569: }
3570:
3571: sub ireceipt {
3572: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
3573: my $cuname=unpack("%32C*",$funame);
3574: my $cudom=unpack("%32C*",$fudom);
3575: my $cucourseid=unpack("%32C*",$fucourseid);
3576: my $cusymb=unpack("%32C*",$fusymb);
3577: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
3578: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
3579: ($cunique%$cuname+
3580: $cunique%$cudom+
3581: $cusymb%$cuname+
3582: $cusymb%$cudom+
3583: $cucourseid%$cuname+
3584: $cucourseid%$cudom);
3585: }
3586:
3587: sub receipt {
3588: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
3589: return &ireceipt($name,$domain,$courseid,$symb);
3590: }
3591:
3592: # ------------------------------------------------------------ Serves up a file
3593: # returns either the contents of the file or a -1
3594: sub getfile {
3595: my $file=shift;
3596: if ($file=~/^\/*uploaded\//) { # user file
3597: my $ua=new LWP::UserAgent;
3598: my $request=new HTTP::Request('GET',&tokenwrapper($file));
3599: my $response=$ua->request($request);
3600: if ($response->is_success()) {
3601: return $response->content;
3602: } else {
3603: return -1;
3604: }
3605: } else { # normal file from res space
3606: &repcopy($file);
3607: if (! -e $file ) { return -1; };
3608: my $fh=Apache::File->new($file);
3609: my $a='';
3610: while (<$fh>) { $a .=$_; }
3611: return $a;
3612: }
3613: }
3614:
3615: sub filelocation {
3616: my ($dir,$file) = @_;
3617: my $location;
3618: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
3619: if ($file=~m:^/~:) { # is a contruction space reference
3620: $location = $file;
3621: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
3622: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
3623: $location=$file;
3624: } else {
3625: $file=~s/^$perlvar{'lonDocRoot'}//;
3626: $file=~s:^/*res::;
3627: if ( !( $file =~ m:^/:) ) {
3628: $location = $dir. '/'.$file;
3629: } else {
3630: $location = '/home/httpd/html/res'.$file;
3631: }
3632: }
3633: $location=~s://+:/:g; # remove duplicate /
3634: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
3635: return $location;
3636: }
3637:
3638: sub hreflocation {
3639: my ($dir,$file)=@_;
3640: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
3641: my $finalpath=filelocation($dir,$file);
3642: $finalpath=~s/^\/home\/httpd\/html//;
3643: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
3644: return $finalpath;
3645: } else {
3646: return $file;
3647: }
3648: }
3649:
3650: # ------------------------------------------------------------- Declutters URLs
3651:
3652: sub declutter {
3653: my $thisfn=shift;
3654: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
3655: $thisfn=~s/^\///;
3656: $thisfn=~s/^res\///;
3657: $thisfn=~s/\?.+$//;
3658: return $thisfn;
3659: }
3660:
3661: # ------------------------------------------------------------- Clutter up URLs
3662:
3663: sub clutter {
3664: my $thisfn='/'.&declutter(shift);
3665: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
3666: $thisfn='/res'.$thisfn;
3667: }
3668: return $thisfn;
3669: }
3670:
3671: # -------------------------------------------------------- Escape Special Chars
3672:
3673: sub escape {
3674: my $str=shift;
3675: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3676: return $str;
3677: }
3678:
3679: # ----------------------------------------------------- Un-Escape Special Chars
3680:
3681: sub unescape {
3682: my $str=shift;
3683: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3684: return $str;
3685: }
3686:
3687: # ================================================================ Main Program
3688:
3689: sub goodbye {
3690: &logthis("Starting Shut down");
3691: &flushcourselogs();
3692: &logthis("Shutting down");
3693: }
3694:
3695: BEGIN {
3696: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
3697: unless ($readit) {
3698: {
3699: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
3700:
3701: while (my $configline=<$config>) {
3702: if ($configline =~ /^[^\#]*PerlSetVar/) {
3703: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3704: chomp($varvalue);
3705: $perlvar{$varname}=$varvalue;
3706: }
3707: }
3708: }
3709: {
3710: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
3711:
3712: while (my $configline=<$config>) {
3713: if ($configline =~ /^[^\#]*PerlSetVar/) {
3714: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3715: chomp($varvalue);
3716: $perlvar{$varname}=$varvalue;
3717: }
3718: }
3719: }
3720:
3721: # ------------------------------------------------------------ Read domain file
3722: {
3723: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
3724: '/domain.tab');
3725: %domaindescription = ();
3726: %domain_auth_def = ();
3727: %domain_auth_arg_def = ();
3728: if ($fh) {
3729: while (<$fh>) {
3730: next if /^\#/;
3731: chomp;
3732: my ($domain, $domain_description, $def_auth, $def_auth_arg)
3733: = split(/:/,$_,4);
3734: $domain_auth_def{$domain}=$def_auth;
3735: $domain_auth_arg_def{$domain}=$def_auth_arg;
3736: $domaindescription{$domain}=$domain_description;
3737: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
3738: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
3739: }
3740: }
3741: }
3742:
3743:
3744: # ------------------------------------------------------------- Read hosts file
3745: {
3746: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
3747:
3748: while (my $configline=<$config>) {
3749: next if ($configline =~ /^(\#|\s*$)/);
3750: chomp($configline);
3751: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
3752: if ($id && $domain && $role && $name && $ip) {
3753: $hostname{$id}=$name;
3754: $hostdom{$id}=$domain;
3755: $hostip{$id}=$ip;
3756: $iphost{$ip}=$id;
3757: if ($role eq 'library') { $libserv{$id}=$name; }
3758: } else {
3759: if ($configline) {
3760: &logthis("Skipping hosts.tab line -$configline-");
3761: }
3762: }
3763: }
3764: }
3765:
3766: # ------------------------------------------------------ Read spare server file
3767: {
3768: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3769:
3770: while (my $configline=<$config>) {
3771: chomp($configline);
3772: if ($configline) {
3773: $spareid{$configline}=1;
3774: }
3775: }
3776: }
3777: # ------------------------------------------------------------ Read permissions
3778: {
3779: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3780:
3781: while (my $configline=<$config>) {
3782: chomp($configline);
3783: if ($configline) {
3784: my ($role,$perm)=split(/ /,$configline);
3785: if ($perm ne '') { $pr{$role}=$perm; }
3786: }
3787: }
3788: }
3789:
3790: # -------------------------------------------- Read plain texts for permissions
3791: {
3792: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3793:
3794: while (my $configline=<$config>) {
3795: chomp($configline);
3796: if ($configline) {
3797: my ($short,$plain)=split(/:/,$configline);
3798: if ($plain ne '') { $prp{$short}=$plain; }
3799: }
3800: }
3801: }
3802:
3803: # ---------------------------------------------------------- Read package table
3804: {
3805: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3806:
3807: while (my $configline=<$config>) {
3808: chomp($configline);
3809: my ($short,$plain)=split(/:/,$configline);
3810: my ($pack,$name)=split(/\&/,$short);
3811: if ($plain ne '') {
3812: $packagetab{$pack.'&'.$name.'&name'}=$name;
3813: $packagetab{$short}=$plain;
3814: }
3815: }
3816: }
3817:
3818: # ------------- set up temporary directory
3819: {
3820: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
3821:
3822: }
3823:
3824: %metacache=();
3825:
3826: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
3827: $dumpcount=0;
3828:
3829: &logtouch();
3830: &logthis('<font color=yellow>INFO: Read configuration</font>');
3831: $readit=1;
3832: }
3833: }
3834:
3835: 1;
3836: __END__
3837:
3838: =pod
3839:
3840: =head1 NAME
3841:
3842: Apache::lonnet - Subroutines to ask questions about things in the network.
3843:
3844: =head1 SYNOPSIS
3845:
3846: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
3847:
3848: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
3849:
3850: Common parameters:
3851:
3852: =over 4
3853:
3854: =item *
3855:
3856: $uname : an internal username (if $cname expecting a course Id specifically)
3857:
3858: =item *
3859:
3860: $udom : a domain (if $cdom expecting a course's domain specifically)
3861:
3862: =item *
3863:
3864: $symb : a resource instance identifier
3865:
3866: =item *
3867:
3868: $namespace : the name of a .db file that contains the data needed or
3869: being set.
3870:
3871: =back
3872:
3873: =head1 INTRODUCTION
3874:
3875: This module provides subroutines which interact with the
3876: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
3877: - classes
3878: - users
3879: - resources
3880:
3881: For many of these objects you can also use this to store data about
3882: them or modify them in various ways.
3883:
3884: This is part of the LearningOnline Network with CAPA project
3885: described at http://www.lon-capa.org.
3886:
3887: =head1 RETURN MESSAGES
3888:
3889: =over 4
3890:
3891: =item *
3892:
3893: con_lost : unable to contact remote host
3894:
3895: =item *
3896:
3897: con_delayed : unable to contact remote host, message will be delivered
3898: when the connection is brought back up
3899:
3900: =item *
3901:
3902: con_failed : unable to contact remote host and unable to save message
3903: for later delivery
3904:
3905: =item *
3906:
3907: error: : an error a occured, a description of the error follows the :
3908:
3909: =item *
3910:
3911: no_such_host : unable to fund a host associated with the user/domain
3912: that was requested
3913:
3914: =back
3915:
3916: =head1 PUBLIC SUBROUTINES
3917:
3918: =head2 Session Environment Functions
3919:
3920: =over 4
3921:
3922: =item *
3923:
3924: appenv(%hash) : the value of %hash is written to the user envirnoment
3925: file, and will be restored for each access this user makes during this
3926: session, also modifies the %ENV for the current process
3927:
3928: =item *
3929:
3930: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
3931:
3932: =back
3933:
3934: =head2 User Information
3935:
3936: =over 4
3937:
3938: =item *
3939:
3940: queryauthenticate($uname,$udom) : try to determine user's current
3941: authentication scheme
3942:
3943: =item *
3944:
3945: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
3946: servers (first use the current one), $upass should be the users password
3947:
3948: =item *
3949:
3950: homeserver($uname,$udom) : find the server which has the user's
3951: directory and files (there must be only one), this caches the answer,
3952: and also caches if there is a borken connection.
3953:
3954: =item *
3955:
3956: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
3957: unique resource in a domain, there must be only 1 ID per username, and
3958: only 1 username per ID in a specific domain) (returns hash:
3959: id=>name,id=>name)
3960:
3961: =item *
3962:
3963: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
3964: name=>id,name=>id)
3965:
3966: =item *
3967:
3968: idput($udom,%ids) : store away a list of names and associated IDs
3969:
3970: =item *
3971:
3972: rolesinit($udom,$username,$authhost) : get user privileges
3973:
3974: =item *
3975:
3976: usection($udom,$uname,$cname) : finds the section of student in the
3977: course $cname, return section name/number or '' for "not in course"
3978: and '-1' for "no section"
3979:
3980: =item *
3981:
3982: userenvironment($udom,$uname,@what) : gets the values of the keys
3983: passed in @what from the requested user's environment, returns a hash
3984:
3985: =back
3986:
3987: =head2 User Roles
3988:
3989: =over 4
3990:
3991: =item *
3992:
3993: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
3994: actions
3995: F: full access
3996: U,I,K: authentication modes (cxx only)
3997: '': forbidden
3998: 1: user needs to choose course
3999: 2: browse allowed
4000:
4001: =item *
4002:
4003: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
4004: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
4005: and course level
4006:
4007: =item *
4008:
4009: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
4010: explanation of a user role term
4011:
4012: =back
4013:
4014: =head2 User Modification
4015:
4016: =over 4
4017:
4018: =item *
4019:
4020: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
4021: user for the level given by URL. Optional start and end dates (leave empty
4022: string or zero for "no date")
4023:
4024: =item *
4025:
4026: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
4027: change a users, password, possible return values are: ok,
4028: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
4029: refused
4030:
4031: =item *
4032:
4033: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
4034:
4035: =item *
4036:
4037: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
4038: modify user
4039:
4040: =item *
4041:
4042: modifystudent
4043:
4044: modify a students enrollment and identification information.
4045: The course id is resolved based on the current users environment.
4046: This means the envoking user must be a course coordinator or otherwise
4047: associated with a course.
4048:
4049: This call is essentially a wrapper for lonnet::modifyuser and
4050: lonnet::modify_student_enrollment
4051:
4052: Inputs:
4053:
4054: =over 4
4055:
4056: =item B<$udom> Students loncapa domain
4057:
4058: =item B<$uname> Students loncapa login name
4059:
4060: =item B<$uid> Students id/student number
4061:
4062: =item B<$umode> Students authentication mode
4063:
4064: =item B<$upass> Students password
4065:
4066: =item B<$first> Students first name
4067:
4068: =item B<$middle> Students middle name
4069:
4070: =item B<$last> Students last name
4071:
4072: =item B<$gene> Students generation
4073:
4074: =item B<$usec> Students section in course
4075:
4076: =item B<$end> Unix time of the roles expiration
4077:
4078: =item B<$start> Unix time of the roles start date
4079:
4080: =item B<$forceid> If defined, allow $uid to be changed
4081:
4082: =item B<$desiredhome> server to use as home server for student
4083:
4084: =back
4085:
4086: =item *
4087:
4088: modify_student_enrollment
4089:
4090: Change a students enrollment status in a class. The environment variable
4091: 'role.request.course' must be defined for this function to proceed.
4092:
4093: Inputs:
4094:
4095: =over 4
4096:
4097: =item $udom, students domain
4098:
4099: =item $uname, students name
4100:
4101: =item $uid, students user id
4102:
4103: =item $first, students first name
4104:
4105: =item $middle
4106:
4107: =item $last
4108:
4109: =item $gene
4110:
4111: =item $usec
4112:
4113: =item $end
4114:
4115: =item $start
4116:
4117: =back
4118:
4119:
4120: =item *
4121:
4122: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
4123: custom role; give a custom role to a user for the level given by URL. Specify
4124: name and domain of role author, and role name
4125:
4126: =item *
4127:
4128: revokerole($udom,$uname,$url,$role) : revoke a role for url
4129:
4130: =item *
4131:
4132: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
4133:
4134: =back
4135:
4136: =head2 Course Infomation
4137:
4138: =over 4
4139:
4140: =item *
4141:
4142: coursedescription($courseid) : course description
4143:
4144: =item *
4145:
4146: courseresdata($coursenum,$coursedomain,@which) : request for current
4147: parameter setting for a specific course, @what should be a list of
4148: parameters to ask about. This routine caches answers for 5 minutes.
4149:
4150: =back
4151:
4152: =head2 Course Modification
4153:
4154: =over 4
4155:
4156: =item *
4157:
4158: writecoursepref($courseid,%prefs) : write preferences (environment
4159: database) for a course
4160:
4161: =item *
4162:
4163: createcourse($udom,$description,$url) : make/modify course
4164:
4165: =back
4166:
4167: =head2 Resource Subroutines
4168:
4169: =over 4
4170:
4171: =item *
4172:
4173: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
4174:
4175: =item *
4176:
4177: repcopy($filename) : subscribes to the requested file, and attempts to
4178: replicate from the owning library server, Might return
4179: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
4180: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
4181: resource. Expects the local filesystem pathname
4182: (/home/httpd/html/res/....)
4183:
4184: =back
4185:
4186: =head2 Resource Information
4187:
4188: =over 4
4189:
4190: =item *
4191:
4192: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
4193: a vairety of different possible values, $varname should be a request
4194: string, and the other parameters can be used to specify who and what
4195: one is asking about.
4196:
4197: Possible values for $varname are environment.lastname (or other item
4198: from the envirnment hash), user.name (or someother aspect about the
4199: user), resource.0.maxtries (or some other part and parameter of a
4200: resource)
4201:
4202: =item *
4203:
4204: directcondval($number) : get current value of a condition; reads from a state
4205: string
4206:
4207: =item *
4208:
4209: condval($condidx) : value of condition index based on state
4210:
4211: =item *
4212:
4213: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
4214: resource's metadata, $what should be either a specific key, or either
4215: 'keys' (to get a list of possible keys) or 'packages' to get a list of
4216: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
4217:
4218: this function automatically caches all requests
4219:
4220: =item *
4221:
4222: metadata_query($query,$custom,$customshow) : make a metadata query against the
4223: network of library servers; returns file handle of where SQL and regex results
4224: will be stored for query
4225:
4226: =item *
4227:
4228: symbread($filename) : return symbolic list entry (filename argument optional);
4229: returns the data handle
4230:
4231: =item *
4232:
4233: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
4234: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
4235: failure, user must be in a course, as it assumes the existance of the
4236: course initi hash, and uses $ENV('request.course.id'}
4237:
4238:
4239: =item *
4240:
4241: symbclean($symb) : removes versions numbers from a symb, returns the
4242: cleaned symb
4243:
4244: =item *
4245:
4246: is_on_map($uri) : checks if the $uri is somewhere on the current
4247: course map, user must be in a course for it to work.
4248:
4249: =item *
4250:
4251: numval($salt) : return random seed value (addend for rndseed)
4252:
4253: =item *
4254:
4255: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
4256: a random seed, all arguments are optional, if they aren't sent it uses the
4257: environment to derive them. Note: if symb isn't sent and it can't get one
4258: from &symbread it will use the current time as its return value
4259:
4260: =item *
4261:
4262: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
4263: unfakeable, receipt
4264:
4265: =item *
4266:
4267: receipt() : API to ireceipt working off of ENV values; given out to users
4268:
4269: =item *
4270:
4271: countacc($url) : count the number of accesses to a given URL
4272:
4273: =item *
4274:
4275: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
4276:
4277: =item *
4278:
4279: checkin($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 $tcrsid)
4280:
4281: =item *
4282:
4283: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
4284:
4285: =item *
4286:
4287: devalidate($symb) : devalidate temporary spreadsheet calculations,
4288: forcing spreadsheet to reevaluate the resource scores next time.
4289:
4290: =back
4291:
4292: =head2 Storing/Retreiving Data
4293:
4294: =over 4
4295:
4296: =item *
4297:
4298: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
4299: for this url; hashref needs to be given and should be a \%hashname; the
4300: remaining args aren't required and if they aren't passed or are '' they will
4301: be derived from the ENV
4302:
4303: =item *
4304:
4305: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
4306: uses critical subroutine
4307:
4308: =item *
4309:
4310: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
4311: all args are optional
4312:
4313: =item *
4314:
4315: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
4316: works very similar to store/cstore, but all data is stored in a
4317: temporary location and can be reset using tmpreset, $storehash should
4318: be a hash reference, returns nothing on success
4319:
4320: =item *
4321:
4322: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
4323: similar to restore, but all data is stored in a temporary location and
4324: can be reset using tmpreset. Returns a hash of values on success,
4325: error string otherwise.
4326:
4327: =item *
4328:
4329: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
4330: deltes all keys for $symb form the temporary storage hash.
4331:
4332: =item *
4333:
4334: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4335: reference filled in from namesp ($udom and $uname are optional)
4336:
4337: =item *
4338:
4339: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
4340: namesp ($udom and $uname are optional)
4341:
4342: =item *
4343:
4344: dump($namespace,$udom,$uname,$regexp) :
4345: dumps the complete (or key matching regexp) namespace into a hash
4346: ($udom, $uname and $regexp are optional)
4347:
4348: =item *
4349:
4350: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
4351: ($udom and $uname are optional)
4352:
4353: =item *
4354:
4355: cput($namespace,$storehash,$udom,$uname) : critical put
4356: ($udom and $uname are optional)
4357:
4358: =item *
4359:
4360: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4361: reference filled in from namesp (encrypts the return communication)
4362: ($udom and $uname are optional)
4363:
4364: =item *
4365:
4366: log($udom,$name,$home,$message) : write to permanent log for user; use
4367: critical subroutine
4368:
4369: =back
4370:
4371: =head2 Network Status Functions
4372:
4373: =over 4
4374:
4375: =item *
4376:
4377: dirlist($uri) : return directory list based on URI
4378:
4379: =item *
4380:
4381: spareserver() : find server with least workload from spare.tab
4382:
4383: =back
4384:
4385: =head2 Apache Request
4386:
4387: =over 4
4388:
4389: =item *
4390:
4391: ssi($url,%hash) : server side include, does a complete request cycle on url to
4392: localhost, posts hash
4393:
4394: =back
4395:
4396: =head2 Data to String to Data
4397:
4398: =over 4
4399:
4400: =item *
4401:
4402: hash2str(%hash) : convert a hash into a string complete with escaping and '='
4403: and '&' separators, supports elements that are arrayrefs and hashrefs
4404:
4405: =item *
4406:
4407: hashref2str($hashref) : convert a hashref into a string complete with
4408: escaping and '=' and '&' separators, supports elements that are
4409: arrayrefs and hashrefs
4410:
4411: =item *
4412:
4413: arrayref2str($arrayref) : convert an arrayref into a string complete
4414: with escaping and '&' separators, supports elements that are arrayrefs
4415: and hashrefs
4416:
4417: =item *
4418:
4419: str2hash($string) : convert string to hash using unescaping and
4420: splitting on '=' and '&', supports elements that are arrayrefs and
4421: hashrefs
4422:
4423: =item *
4424:
4425: str2array($string) : convert string to hash using unescaping and
4426: splitting on '&', supports elements that are arrayrefs and hashrefs
4427:
4428: =back
4429:
4430: =head2 Logging Routines
4431:
4432: =over 4
4433:
4434: These routines allow one to make log messages in the lonnet.log and
4435: lonnet.perm logfiles.
4436:
4437: =item *
4438:
4439: logtouch() : make sure the logfile, lonnet.log, exists
4440:
4441: =item *
4442:
4443: logthis() : append message to the normal lonnet.log file, it gets
4444: preiodically rolled over and deleted.
4445:
4446: =item *
4447:
4448: logperm() : append a permanent message to lonnet.perm.log, this log
4449: file never gets deleted by any automated portion of the system, only
4450: messages of critical importance should go in here.
4451:
4452: =back
4453:
4454: =head2 General File Helper Routines
4455:
4456: =over 4
4457:
4458: =item *
4459:
4460: getfile($file) : returns the entire contents of a file or -1; it
4461: properly subscribes to and replicates the file if neccessary.
4462:
4463: =item *
4464:
4465: filelocation($dir,$file) : returns file system location of a file
4466: based on URI; meant to be "fairly clean" absolute reference, $dir is a
4467: directory that relative $file lookups are to looked in ($dir of /a/dir
4468: and a file of ../bob will become /a/bob)
4469:
4470: =item *
4471:
4472: hreflocation($dir,$file) : returns file system location or a URL; same as
4473: filelocation except for hrefs
4474:
4475: =item *
4476:
4477: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
4478:
4479: =back
4480:
4481: =head2 HTTP Helper Routines
4482:
4483: =over 4
4484:
4485: =item *
4486:
4487: escape() : unpack non-word characters into CGI-compatible hex codes
4488:
4489: =item *
4490:
4491: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
4492:
4493: =back
4494:
4495: =head1 PRIVATE SUBROUTINES
4496:
4497: =head2 Underlying communication routines (Shouldn't call)
4498:
4499: =over 4
4500:
4501: =item *
4502:
4503: subreply() : tries to pass a message to lonc, returns con_lost if incapable
4504:
4505: =item *
4506:
4507: reply() : uses subreply to send a message to remote machine, logs all failures
4508:
4509: =item *
4510:
4511: critical() : passes a critical message to another server; if cannot
4512: get through then place message in connection buffer directory and
4513: returns con_delayed, if incapable of saving message, returns
4514: con_failed
4515:
4516: =item *
4517:
4518: reconlonc() : tries to reconnect lonc client processes.
4519:
4520: =back
4521:
4522: =head2 Resource Access Logging
4523:
4524: =over 4
4525:
4526: =item *
4527:
4528: flushcourselogs() : flush (save) buffer logs and access logs
4529:
4530: =item *
4531:
4532: courselog($what) : save message for course in hash
4533:
4534: =item *
4535:
4536: courseacclog($what) : save message for course using &courselog(). Perform
4537: special processing for specific resource types (problems, exams, quizzes, etc).
4538:
4539: =item *
4540:
4541: goodbye() : flush course logs and log shutting down; it is called in srm.conf
4542: as a PerlChildExitHandler
4543:
4544: =back
4545:
4546: =head2 Other
4547:
4548: =over 4
4549:
4550: =item *
4551:
4552: symblist($mapname,%newhash) : update symbolic storage links
4553:
4554: =back
4555:
4556: =cut
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