1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.353 2003/03/26 04:57:04 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 %userrolehash $processmarker $dumpcount
78: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseresdatacache
79: %domaindescription %domain_auth_def %domain_auth_arg_def $tmpdir);
80: use IO::Socket;
81: use GDBM_File;
82: use Apache::Constants qw(:common :http);
83: use HTML::LCParser;
84: use Fcntl qw(:flock);
85: use Apache::loncoursedata;
86:
87: my $readit;
88:
89: # --------------------------------------------------------------------- Logging
90:
91: sub logtouch {
92: my $execdir=$perlvar{'lonDaemons'};
93: unless (-e "$execdir/logs/lonnet.log") {
94: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
95: close $fh;
96: }
97: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
98: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
99: }
100:
101: sub logthis {
102: my $message=shift;
103: my $execdir=$perlvar{'lonDaemons'};
104: my $now=time;
105: my $local=localtime($now);
106: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
107: print $fh "$local ($$): $message\n";
108: return 1;
109: }
110:
111: sub logperm {
112: my $message=shift;
113: my $execdir=$perlvar{'lonDaemons'};
114: my $now=time;
115: my $local=localtime($now);
116: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
117: print $fh "$now:$message:$local\n";
118: return 1;
119: }
120:
121: # -------------------------------------------------- Non-critical communication
122: sub subreply {
123: my ($cmd,$server)=@_;
124: my $peerfile="$perlvar{'lonSockDir'}/$server";
125: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
126: Type => SOCK_STREAM,
127: Timeout => 10)
128: or return "con_lost";
129: print $client "$cmd\n";
130: my $answer=<$client>;
131: if (!$answer) { $answer="con_lost"; }
132: chomp($answer);
133: return $answer;
134: }
135:
136: sub reply {
137: my ($cmd,$server)=@_;
138: unless (defined($hostname{$server})) { return 'no_such_host'; }
139: my $answer=subreply($cmd,$server);
140: if ($answer eq 'con_lost') {
141: #sleep 5;
142: #$answer=subreply($cmd,$server);
143: #if ($answer eq 'con_lost') {
144: # &logthis("Second attempt con_lost on $server");
145: # my $peerfile="$perlvar{'lonSockDir'}/$server";
146: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
147: # Type => SOCK_STREAM,
148: # Timeout => 10)
149: # or return "con_lost";
150: # &logthis("Killing socket");
151: # print $client "close_connection_exit\n";
152: #sleep 5;
153: # $answer=subreply($cmd,$server);
154: #}
155: }
156: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
157: &logthis("<font color=blue>WARNING:".
158: " $cmd to $server returned $answer</font>");
159: }
160: return $answer;
161: }
162:
163: # ----------------------------------------------------------- Send USR1 to lonc
164:
165: sub reconlonc {
166: my $peerfile=shift;
167: &logthis("Trying to reconnect for $peerfile");
168: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
169: if (my $fh=Apache::File->new("$loncfile")) {
170: my $loncpid=<$fh>;
171: chomp($loncpid);
172: if (kill 0 => $loncpid) {
173: &logthis("lonc at pid $loncpid responding, sending USR1");
174: kill USR1 => $loncpid;
175: sleep 1;
176: if (-e "$peerfile") { return; }
177: &logthis("$peerfile still not there, give it another try");
178: sleep 5;
179: if (-e "$peerfile") { return; }
180: &logthis(
181: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
182: } else {
183: &logthis(
184: "<font color=blue>WARNING:".
185: " lonc at pid $loncpid not responding, giving up</font>");
186: }
187: } else {
188: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
189: }
190: }
191:
192: # ------------------------------------------------------ Critical communication
193:
194: sub critical {
195: my ($cmd,$server)=@_;
196: unless ($hostname{$server}) {
197: &logthis("<font color=blue>WARNING:".
198: " Critical message to unknown server ($server)</font>");
199: return 'no_such_host';
200: }
201: my $answer=reply($cmd,$server);
202: if ($answer eq 'con_lost') {
203: my $pingreply=reply('ping',$server);
204: &reconlonc("$perlvar{'lonSockDir'}/$server");
205: my $pongreply=reply('pong',$server);
206: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
207: $answer=reply($cmd,$server);
208: if ($answer eq 'con_lost') {
209: my $now=time;
210: my $middlename=$cmd;
211: $middlename=substr($middlename,0,16);
212: $middlename=~s/\W//g;
213: my $dfilename=
214: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
215: $dumpcount++;
216: {
217: my $dfh;
218: if ($dfh=Apache::File->new(">$dfilename")) {
219: print $dfh "$cmd\n";
220: }
221: }
222: sleep 2;
223: my $wcmd='';
224: {
225: my $dfh;
226: if ($dfh=Apache::File->new("$dfilename")) {
227: $wcmd=<$dfh>;
228: }
229: }
230: chomp($wcmd);
231: if ($wcmd eq $cmd) {
232: &logthis("<font color=blue>WARNING: ".
233: "Connection buffer $dfilename: $cmd</font>");
234: &logperm("D:$server:$cmd");
235: return 'con_delayed';
236: } else {
237: &logthis("<font color=red>CRITICAL:"
238: ." Critical connection failed: $server $cmd</font>");
239: &logperm("F:$server:$cmd");
240: return 'con_failed';
241: }
242: }
243: }
244: return $answer;
245: }
246:
247: # ---------------------------------------------------------- Append Environment
248:
249: sub appenv {
250: my %newenv=@_;
251: foreach (keys %newenv) {
252: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
253: &logthis("<font color=blue>WARNING: ".
254: "Attempt to modify environment ".$_." to ".$newenv{$_}
255: .'</font>');
256: delete($newenv{$_});
257: } else {
258: $ENV{$_}=$newenv{$_};
259: }
260: }
261:
262: my $lockfh;
263: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
264: return 'error: '.$!;
265: }
266: unless (flock($lockfh,LOCK_EX)) {
267: &logthis("<font color=blue>WARNING: ".
268: 'Could not obtain exclusive lock in appenv: '.$!);
269: $lockfh->close();
270: return 'error: '.$!;
271: }
272:
273: my @oldenv;
274: {
275: my $fh;
276: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
277: return 'error: '.$!;
278: }
279: @oldenv=<$fh>;
280: $fh->close();
281: }
282: for (my $i=0; $i<=$#oldenv; $i++) {
283: chomp($oldenv[$i]);
284: if ($oldenv[$i] ne '') {
285: my ($name,$value)=split(/=/,$oldenv[$i]);
286: unless (defined($newenv{$name})) {
287: $newenv{$name}=$value;
288: }
289: }
290: }
291: {
292: my $fh;
293: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
294: return 'error';
295: }
296: my $newname;
297: foreach $newname (keys %newenv) {
298: print $fh "$newname=$newenv{$newname}\n";
299: }
300: $fh->close();
301: }
302:
303: $lockfh->close();
304: return 'ok';
305: }
306: # ----------------------------------------------------- Delete from Environment
307:
308: sub delenv {
309: my $delthis=shift;
310: my %newenv=();
311: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
312: &logthis("<font color=blue>WARNING: ".
313: "Attempt to delete from environment ".$delthis);
314: return 'error';
315: }
316: my @oldenv;
317: {
318: my $fh;
319: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
320: return 'error';
321: }
322: unless (flock($fh,LOCK_SH)) {
323: &logthis("<font color=blue>WARNING: ".
324: 'Could not obtain shared lock in delenv: '.$!);
325: $fh->close();
326: return 'error: '.$!;
327: }
328: @oldenv=<$fh>;
329: $fh->close();
330: }
331: {
332: my $fh;
333: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
334: return 'error';
335: }
336: unless (flock($fh,LOCK_EX)) {
337: &logthis("<font color=blue>WARNING: ".
338: 'Could not obtain exclusive lock in delenv: '.$!);
339: $fh->close();
340: return 'error: '.$!;
341: }
342: foreach (@oldenv) {
343: unless ($_=~/^$delthis/) { print $fh $_; }
344: }
345: $fh->close();
346: }
347: return 'ok';
348: }
349:
350: # ------------------------------------------ Fight off request when overloaded
351:
352: sub overloaderror {
353: my ($r,$checkserver)=@_;
354: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
355: my $loadavg;
356: if ($checkserver eq $perlvar{'lonHostID'}) {
357: my $loadfile=Apache::File->new('/proc/loadavg');
358: $loadavg=<$loadfile>;
359: $loadavg =~ s/\s.*//g;
360: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
361: } else {
362: $loadavg=&reply('load',$checkserver);
363: }
364: my $overload=$loadavg-100;
365: if ($overload>0) {
366: $r->err_headers_out->{'Retry-After'}=$overload;
367: $r->log_error('Overload of '.$overload.' on '.$checkserver);
368: return 413;
369: }
370: return '';
371: }
372:
373: # ------------------------------ Find server with least workload from spare.tab
374:
375: sub spareserver {
376: my $loadpercent = shift;
377: my $tryserver;
378: my $spareserver='';
379: my $lowestserver=$loadpercent;
380: foreach $tryserver (keys %spareid) {
381: my $answer=reply('load',$tryserver);
382: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
383: $spareserver="http://$hostname{$tryserver}";
384: $lowestserver=$answer;
385: }
386: }
387: return $spareserver;
388: }
389:
390: # --------------------------------------------- Try to change a user's password
391:
392: sub changepass {
393: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
394: $currentpass = &escape($currentpass);
395: $newpass = &escape($newpass);
396: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
397: $server);
398: if (! $answer) {
399: &logthis("No reply on password change request to $server ".
400: "by $uname in domain $udom.");
401: } elsif ($answer =~ "^ok") {
402: &logthis("$uname in $udom successfully changed their password ".
403: "on $server.");
404: } elsif ($answer =~ "^pwchange_failure") {
405: &logthis("$uname in $udom was unable to change their password ".
406: "on $server. The action was blocked by either lcpasswd ".
407: "or pwchange");
408: } elsif ($answer =~ "^non_authorized") {
409: &logthis("$uname in $udom did not get their password correct when ".
410: "attempting to change it on $server.");
411: } elsif ($answer =~ "^auth_mode_error") {
412: &logthis("$uname in $udom attempted to change their password despite ".
413: "not being locally or internally authenticated on $server.");
414: } elsif ($answer =~ "^unknown_user") {
415: &logthis("$uname in $udom attempted to change their password ".
416: "on $server but were unable to because $server is not ".
417: "their home server.");
418: } elsif ($answer =~ "^refused") {
419: &logthis("$server refused to change $uname in $udom password because ".
420: "it was sent an unencrypted request to change the password.");
421: }
422: return $answer;
423: }
424:
425: # ----------------------- Try to determine user's current authentication scheme
426:
427: sub queryauthenticate {
428: my ($uname,$udom)=@_;
429: if (($perlvar{'lonRole'} eq 'library') &&
430: ($udom eq $perlvar{'lonDefDomain'})) {
431: my $answer=reply("encrypt:currentauth:$udom:$uname",
432: $perlvar{'lonHostID'});
433: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
434: if (length($answer)) {
435: return $answer;
436: }
437: else {
438: &logthis("User $uname at $udom lacks an authentication mechanism");
439: return 'no_host';
440: }
441: }
442: }
443:
444: my $tryserver;
445: foreach $tryserver (keys %libserv) {
446: if ($hostdom{$tryserver} eq $udom) {
447: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
448: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
449: if (length($answer)) {
450: return $answer;
451: }
452: else {
453: &logthis("User $uname at $udom lacks an authentication mechanism");
454: return 'no_host';
455: }
456: }
457: }
458: }
459: &logthis("User $uname at $udom lacks an authentication mechanism");
460: return 'no_host';
461: }
462:
463: # --------- Try to authenticate user from domain's lib servers (first this one)
464:
465: sub authenticate {
466: my ($uname,$upass,$udom)=@_;
467: $upass=escape($upass);
468: $uname=~s/\W//g;
469: if (($perlvar{'lonRole'} eq 'library') &&
470: ($udom eq $perlvar{'lonDefDomain'})) {
471: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
472: if ($answer =~ /authorized/) {
473: if ($answer eq 'authorized') {
474: &logthis("User $uname at $udom authorized by local server");
475: return $perlvar{'lonHostID'};
476: }
477: if ($answer eq 'non_authorized') {
478: &logthis("User $uname at $udom rejected by local server");
479: return 'no_host';
480: }
481: }
482: }
483:
484: my $tryserver;
485: foreach $tryserver (keys %libserv) {
486: if ($hostdom{$tryserver} eq $udom) {
487: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
488: if ($answer =~ /authorized/) {
489: if ($answer eq 'authorized') {
490: &logthis("User $uname at $udom authorized by $tryserver");
491: return $tryserver;
492: }
493: if ($answer eq 'non_authorized') {
494: &logthis("User $uname at $udom rejected by $tryserver");
495: return 'no_host';
496: }
497: }
498: }
499: }
500: &logthis("User $uname at $udom could not be authenticated");
501: return 'no_host';
502: }
503:
504: # ---------------------- Find the homebase for a user from domain's lib servers
505:
506: sub homeserver {
507: my ($uname,$udom,$ignoreBadCache)=@_;
508: my $index="$uname:$udom";
509: if ($homecache{$index}) {
510: return "$homecache{$index}";
511: }
512: my $tryserver;
513: foreach $tryserver (keys %libserv) {
514: next if ($ignoreBadCache ne 'true' &&
515: exists($badServerCache{$tryserver}));
516: if ($hostdom{$tryserver} eq $udom) {
517: my $answer=reply("home:$udom:$uname",$tryserver);
518: if ($answer eq 'found') {
519: $homecache{$index}=$tryserver;
520: return $tryserver;
521: } elsif ($answer eq 'no_host') {
522: $badServerCache{$tryserver}=1;
523: }
524: }
525: }
526: return 'no_host';
527: }
528:
529: # ------------------------------------- Find the usernames behind a list of IDs
530:
531: sub idget {
532: my ($udom,@ids)=@_;
533: my %returnhash=();
534:
535: my $tryserver;
536: foreach $tryserver (keys %libserv) {
537: if ($hostdom{$tryserver} eq $udom) {
538: my $idlist=join('&',@ids);
539: $idlist=~tr/A-Z/a-z/;
540: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
541: my @answer=();
542: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
543: @answer=split(/\&/,$reply);
544: } ;
545: my $i;
546: for ($i=0;$i<=$#ids;$i++) {
547: if ($answer[$i]) {
548: $returnhash{$ids[$i]}=$answer[$i];
549: }
550: }
551: }
552: }
553: return %returnhash;
554: }
555:
556: # ------------------------------------- Find the IDs behind a list of usernames
557:
558: sub idrget {
559: my ($udom,@unames)=@_;
560: my %returnhash=();
561: foreach (@unames) {
562: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
563: }
564: return %returnhash;
565: }
566:
567: # ------------------------------- Store away a list of names and associated IDs
568:
569: sub idput {
570: my ($udom,%ids)=@_;
571: my %servers=();
572: foreach (keys %ids) {
573: my $uhom=&homeserver($_,$udom);
574: if ($uhom ne 'no_host') {
575: my $id=&escape($ids{$_});
576: $id=~tr/A-Z/a-z/;
577: my $unam=&escape($_);
578: if ($servers{$uhom}) {
579: $servers{$uhom}.='&'.$id.'='.$unam;
580: } else {
581: $servers{$uhom}=$id.'='.$unam;
582: }
583: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
584: }
585: }
586: foreach (keys %servers) {
587: &critical('idput:'.$udom.':'.$servers{$_},$_);
588: }
589: }
590:
591: # --------------------------------------------------- Assign a key to a student
592:
593: sub assign_access_key {
594: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
595: $cdom=
596: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
597: $cnum=
598: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
599: $udom=$ENV{'user.name'} unless (defined($udom));
600: $uname=$ENV{'user.domain'} unless (defined($uname));
601: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
602: if (($existing{$ckey}=~/^\d+$/) || # has time - new key
603: ($existing{$ckey} eq $uname.':'.$udom)) { # this should not happen,
604: # unless something went wrong
605: # the first time around
606: # ready to assign
607: } elsif (!$existing{$ckey}) {
608: if (&put('accesskey',{$ckey=>$uname.':'.$udom},$cdom,$cnum) eq 'ok') {
609: # key now belongs to user
610: my $envkey='key.'.$cdom.'_'.$cnum;
611: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
612: &appenv('environment.'.$envkey => $ckey);
613: return 'ok';
614: } else {
615: return
616: 'error: Count not permanently assign key, will need to be re-entered later.';
617: }
618: } else {
619: return 'error: Could not assign key, try again later.';
620: }
621: # the key does not exist
622: return 'error: The key does not exist';
623: } else {
624: # the key is somebody else's
625: return 'error: The key is already in use';
626: }
627: }
628:
629: # ------------------------------------------------------ Generate a set of keys
630:
631: sub generate_access_keys {
632: my ($number,$cdom,$cnum)=@_;
633: $cdom=
634: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
635: $cnum=
636: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
637: unless (&allowed('ccc',$cdom)) { return 0; }
638: unless (($cdom) && ($cnum)) { return 0; }
639: if ($number>10000) { return 0; }
640: sleep(2); # make sure don't get same seed twice
641: srand(time()^($$+($$<<15))); # from "Programming Perl"
642: my $total=0;
643: for (my $i=1;$i<=$number;$i++) {
644: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
645: sprintf("%lx",int(100000*rand)).'-'.
646: sprintf("%lx",int(100000*rand));
647: $newkey=~s/1/g/g; # folks mix up 1 and l
648: $newkey=~s/0/h/g; # and also 0 and O
649: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
650: if ($existing{$newkey}) {
651: $i--;
652: } else {
653: if (&put('accesskeys',{ $newkey => time() },$cdom,$cnum) eq 'ok') {
654: $total++;
655: }
656: }
657: }
658: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
659: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
660: return $total;
661: }
662:
663: # ------------------------------------------------------- Validate an accesskey
664:
665: sub validate_access_key {
666: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
667: $cdom=
668: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
669: $cnum=
670: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
671: $udom=$ENV{'user.name'} unless (defined($udom));
672: $uname=$ENV{'user.domain'} unless (defined($uname));
673: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
674: return ($existing{$ckey} eq $uname.':'.$udom);
675: }
676:
677: # ------------------------------------- Find the section of student in a course
678:
679: sub getsection {
680: my ($udom,$unam,$courseid)=@_;
681: $courseid=~s/\_/\//g;
682: $courseid=~s/^(\w)/\/$1/;
683: my %Pending;
684: my %Expired;
685: #
686: # Each role can either have not started yet (pending), be active,
687: # or have expired.
688: #
689: # If there is an active role, we are done.
690: #
691: # If there is more than one role which has not started yet,
692: # choose the one which will start sooner
693: # If there is one role which has not started yet, return it.
694: #
695: # If there is more than one expired role, choose the one which ended last.
696: # If there is a role which has expired, return it.
697: #
698: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
699: &homeserver($unam,$udom)))) {
700: my ($key,$value)=split(/\=/,$_);
701: $key=&unescape($key);
702: next if ($key !~/^$courseid(?:\/)*(\w+)*\_st$/);
703: my $section=$1;
704: if ($key eq $courseid.'_st') { $section=''; }
705: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
706: my $now=time;
707: if (defined($end) && ($now > $end)) {
708: $Expired{$end}=$section;
709: next;
710: }
711: if (defined($start) && ($now < $start)) {
712: $Pending{$start}=$section;
713: next;
714: }
715: return $section;
716: }
717: #
718: # Presumedly there will be few matching roles from the above
719: # loop and the sorting time will be negligible.
720: if (scalar(keys(%Pending))) {
721: my ($time) = sort {$a <=> $b} keys(%Pending);
722: return $Pending{$time};
723: }
724: if (scalar(keys(%Expired))) {
725: my @sorted = sort {$a <=> $b} keys(%Expired);
726: my $time = pop(@sorted);
727: return $Expired{$time};
728: }
729: return '-1';
730: }
731:
732: sub usection {
733: my ($udom,$unam,$courseid)=@_;
734: $courseid=~s/\_/\//g;
735: $courseid=~s/^(\w)/\/$1/;
736: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
737: &homeserver($unam,$udom)))) {
738: my ($key,$value)=split(/\=/,$_);
739: $key=&unescape($key);
740: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
741: my $section=$1;
742: if ($key eq $courseid.'_st') { $section=''; }
743: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
744: my $now=time;
745: my $notactive=0;
746: if ($start) {
747: if ($now<$start) { $notactive=1; }
748: }
749: if ($end) {
750: if ($now>$end) { $notactive=1; }
751: }
752: unless ($notactive) { return $section; }
753: }
754: }
755: return '-1';
756: }
757:
758: # ------------------------------------- Read an entry from a user's environment
759:
760: sub userenvironment {
761: my ($udom,$unam,@what)=@_;
762: my %returnhash=();
763: my @answer=split(/\&/,
764: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
765: &homeserver($unam,$udom)));
766: my $i;
767: for ($i=0;$i<=$#what;$i++) {
768: $returnhash{$what[$i]}=&unescape($answer[$i]);
769: }
770: return %returnhash;
771: }
772:
773: # -------------------------------------------------------------------- New chat
774:
775: sub chatsend {
776: my ($newentry,$anon)=@_;
777: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
778: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
779: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
780: &reply('chatsend:'.$cdom.':'.$cnum.':'.
781: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
782: &escape($newentry)),$chome);
783: }
784:
785: # ------------------------------------------ Find current version of a resource
786:
787: sub getversion {
788: my $fname=&clutter(shift);
789: unless ($fname=~/^\/res\//) { return -1; }
790: return ¤tversion(&filelocation('',$fname));
791: }
792:
793: sub currentversion {
794: my $fname=shift;
795: my $author=$fname;
796: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
797: my ($udom,$uname)=split(/\//,$author);
798: my $home=homeserver($uname,$udom);
799: if ($home eq 'no_host') {
800: return -1;
801: }
802: my $answer=reply("currentversion:$fname",$home);
803: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
804: return -1;
805: }
806: return $answer;
807: }
808:
809: # ----------------------------- Subscribe to a resource, return URL if possible
810:
811: sub subscribe {
812: my $fname=shift;
813: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
814: my $author=$fname;
815: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
816: my ($udom,$uname)=split(/\//,$author);
817: my $home=homeserver($uname,$udom);
818: if ($home eq 'no_host') {
819: return 'not_found';
820: }
821: my $answer=reply("sub:$fname",$home);
822: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
823: $answer.=' by '.$home;
824: }
825: return $answer;
826: }
827:
828: # -------------------------------------------------------------- Replicate file
829:
830: sub repcopy {
831: my $filename=shift;
832: $filename=~s/\/+/\//g;
833: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
834: my $transname="$filename.in.transfer";
835: if ((-e $filename) || (-e $transname)) { return OK; }
836: my $remoteurl=subscribe($filename);
837: if ($remoteurl =~ /^con_lost by/) {
838: &logthis("Subscribe returned $remoteurl: $filename");
839: return HTTP_SERVICE_UNAVAILABLE;
840: } elsif ($remoteurl eq 'not_found') {
841: &logthis("Subscribe returned not_found: $filename");
842: return HTTP_NOT_FOUND;
843: } elsif ($remoteurl =~ /^rejected by/) {
844: &logthis("Subscribe returned $remoteurl: $filename");
845: return FORBIDDEN;
846: } elsif ($remoteurl eq 'directory') {
847: return OK;
848: } else {
849: my $author=$filename;
850: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
851: my ($udom,$uname)=split(/\//,$author);
852: my $home=homeserver($uname,$udom);
853: unless ($home eq $perlvar{'lonHostID'}) {
854: my @parts=split(/\//,$filename);
855: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
856: if ($path ne "$perlvar{'lonDocRoot'}/res") {
857: &logthis("Malconfiguration for replication: $filename");
858: return HTTP_BAD_REQUEST;
859: }
860: my $count;
861: for ($count=5;$count<$#parts;$count++) {
862: $path.="/$parts[$count]";
863: if ((-e $path)!=1) {
864: mkdir($path,0777);
865: }
866: }
867: my $ua=new LWP::UserAgent;
868: my $request=new HTTP::Request('GET',"$remoteurl");
869: my $response=$ua->request($request,$transname);
870: if ($response->is_error()) {
871: unlink($transname);
872: my $message=$response->status_line;
873: &logthis("<font color=blue>WARNING:"
874: ." LWP get: $message: $filename</font>");
875: return HTTP_SERVICE_UNAVAILABLE;
876: } else {
877: if ($remoteurl!~/\.meta$/) {
878: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
879: my $mresponse=$ua->request($mrequest,$filename.'.meta');
880: if ($mresponse->is_error()) {
881: unlink($filename.'.meta');
882: &logthis(
883: "<font color=yellow>INFO: No metadata: $filename</font>");
884: }
885: }
886: rename($transname,$filename);
887: return OK;
888: }
889: }
890: }
891: }
892:
893: # ------------------------------------------------ Get server side include body
894: sub ssi_body {
895: my $filelink=shift;
896: my $output=($filelink=~/^http\:/?&externalssi($filelink):
897: &ssi($filelink));
898: $output=~s/^.*\<body[^\>]*\>//si;
899: $output=~s/\<\/body\s*\>.*$//si;
900: $output=~
901: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
902: return $output;
903: }
904:
905: # --------------------------------------------------------- Server Side Include
906:
907: sub ssi {
908:
909: my ($fn,%form)=@_;
910:
911: my $ua=new LWP::UserAgent;
912:
913: my $request;
914:
915: if (%form) {
916: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
917: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
918: } else {
919: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
920: }
921:
922: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
923: my $response=$ua->request($request);
924:
925: return $response->content;
926: }
927:
928: sub externalssi {
929: my ($url)=@_;
930: my $ua=new LWP::UserAgent;
931: my $request=new HTTP::Request('GET',$url);
932: my $response=$ua->request($request);
933: return $response->content;
934: }
935:
936: # ------- Add a token to a remote URI's query string to vouch for access rights
937:
938: sub tokenwrapper {
939: my $uri=shift;
940: $uri=~s/^http\:\/\/([^\/]+)//;
941: $uri=~s/^\///;
942: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
943: my $token=$1;
944: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
945: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
946: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
947: (($uri=~/\?/)?'&':'?').'token='.$token.
948: '&tokenissued='.$perlvar{'lonHostID'};
949: } else {
950: return '/adm/notfound.html';
951: }
952: }
953:
954: # --------------- Take an uploaded file and put it into the userfiles directory
955: # input: name of form element, coursedoc=1 means this is for the course
956: # output: url of file in userspace
957:
958: sub userfileupload {
959: my ($formname,$coursedoc)=@_;
960: my $fname=$ENV{'form.'.$formname.'.filename'};
961: # Replace Windows backslashes by forward slashes
962: $fname=~s/\\/\//g;
963: # Get rid of everything but the actual filename
964: $fname=~s/^.*\/([^\/]+)$/$1/;
965: # Replace spaces by underscores
966: $fname=~s/\s+/\_/g;
967: # Replace all other weird characters by nothing
968: $fname=~s/[^\w\.\-]//g;
969: # See if there is anything left
970: unless ($fname) { return 'error: no uploaded file'; }
971: chop($ENV{'form.'.$formname});
972: # Create the directory if not present
973: my $docuname='';
974: my $docudom='';
975: my $docuhome='';
976: if ($coursedoc) {
977: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
978: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
979: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
980: } else {
981: $docuname=$ENV{'user.name'};
982: $docudom=$ENV{'user.domain'};
983: $docuhome=$ENV{'user.home'};
984: }
985: return
986: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
987: }
988:
989: sub finishuserfileupload {
990: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
991: my $path=$docudom.'/'.$docuname.'/';
992: my $filepath=$perlvar{'lonDocRoot'};
993: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
994: my $count;
995: for ($count=4;$count<=$#parts;$count++) {
996: $filepath.="/$parts[$count]";
997: if ((-e $filepath)!=1) {
998: mkdir($filepath,0777);
999: }
1000: }
1001: # Save the file
1002: {
1003: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
1004: print $fh $ENV{'form.'.$formname};
1005: }
1006: # Notify homeserver to grep it
1007: #
1008:
1009: my $fetchresult=
1010: &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
1011: if ($fetchresult eq 'ok') {
1012: #
1013: # Return the URL to it
1014: return '/uploaded/'.$path.$fname;
1015: } else {
1016: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
1017: ' to host '.$docuhome.': '.$fetchresult);
1018: return '/adm/notfound.html';
1019: }
1020: }
1021:
1022: # ------------------------------------------------------------------------- Log
1023:
1024: sub log {
1025: my ($dom,$nam,$hom,$what)=@_;
1026: return critical("log:$dom:$nam:$what",$hom);
1027: }
1028:
1029: # ------------------------------------------------------------------ Course Log
1030: #
1031: # This routine flushes several buffers of non-mission-critical nature
1032: #
1033:
1034: sub flushcourselogs {
1035: &logthis('Flushing log buffers');
1036: #
1037: # course logs
1038: # This is a log of all transactions in a course, which can be used
1039: # for data mining purposes
1040: #
1041: # It also collects the courseid database, which lists last transaction
1042: # times and course titles for all courseids
1043: #
1044: my %courseidbuffer=();
1045: foreach (keys %courselogs) {
1046: my $crsid=$_;
1047: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1048: &escape($courselogs{$crsid}),
1049: $coursehombuf{$crsid}) eq 'ok') {
1050: delete $courselogs{$crsid};
1051: } else {
1052: &logthis('Failed to flush log buffer for '.$crsid);
1053: if (length($courselogs{$crsid})>40000) {
1054: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1055: " exceeded maximum size, deleting.</font>");
1056: delete $courselogs{$crsid};
1057: }
1058: }
1059: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1060: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1061: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1062: } else {
1063: $courseidbuffer{$coursehombuf{$crsid}}=
1064: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1065: }
1066: }
1067: #
1068: # Write course id database (reverse lookup) to homeserver of courses
1069: # Is used in pickcourse
1070: #
1071: foreach (keys %courseidbuffer) {
1072: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1073: }
1074: #
1075: # File accesses
1076: # Writes to the dynamic metadata of resources to get hit counts, etc.
1077: #
1078: foreach (keys %accesshash) {
1079: my $entry=$_;
1080: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
1081: my %temphash=($entry => $accesshash{$entry});
1082: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
1083: delete $accesshash{$entry};
1084: }
1085: }
1086: #
1087: # Roles
1088: # Reverse lookup of user roles for course faculty/staff and co-authorship
1089: #
1090: foreach (keys %userrolehash) {
1091: my $entry=$_;
1092: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1093: split(/\:/,$entry);
1094: if (&Apache::lonnet::put('nohist_userroles',
1095: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1096: $rudom,$runame) eq 'ok') {
1097: delete $userrolehash{$entry};
1098: }
1099: }
1100: $dumpcount++;
1101: }
1102:
1103: sub courselog {
1104: my $what=shift;
1105: $what=time.':'.$what;
1106: unless ($ENV{'request.course.id'}) { return ''; }
1107: $coursedombuf{$ENV{'request.course.id'}}=
1108: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1109: $coursenumbuf{$ENV{'request.course.id'}}=
1110: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1111: $coursehombuf{$ENV{'request.course.id'}}=
1112: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1113: $coursedescrbuf{$ENV{'request.course.id'}}=
1114: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1115: if (defined $courselogs{$ENV{'request.course.id'}}) {
1116: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1117: } else {
1118: $courselogs{$ENV{'request.course.id'}}.=$what;
1119: }
1120: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1121: &flushcourselogs();
1122: }
1123: }
1124:
1125: sub courseacclog {
1126: my $fnsymb=shift;
1127: unless ($ENV{'request.course.id'}) { return ''; }
1128: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1129: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
1130: $what.=':POST';
1131: foreach (keys %ENV) {
1132: if ($_=~/^form\.(.*)/) {
1133: $what.=':'.$1.'='.$ENV{$_};
1134: }
1135: }
1136: }
1137: &courselog($what);
1138: }
1139:
1140: sub countacc {
1141: my $url=&declutter(shift);
1142: unless ($ENV{'request.course.id'}) { return ''; }
1143: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1144: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1145: if (defined($accesshash{$key})) {
1146: $accesshash{$key}++;
1147: } else {
1148: $accesshash{$key}=1;
1149: }
1150: }
1151:
1152: sub userrolelog {
1153: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1154: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1155: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1156: ($trole=~/^cr/)) {
1157: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1158: $userrolehash
1159: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1160: =$tend.':'.$tstart;
1161: }
1162: }
1163:
1164: sub get_course_adv_roles {
1165: my $cid=shift;
1166: $cid=$ENV{'request.course.id'} unless (defined($cid));
1167: my %coursehash=&coursedescription($cid);
1168: my %returnhash=();
1169: my %dumphash=
1170: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1171: my $now=time;
1172: foreach (keys %dumphash) {
1173: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1174: if (($tstart) && ($tstart<0)) { next; }
1175: if (($tend) && ($tend<$now)) { next; }
1176: if (($tstart) && ($now<$tstart)) { next; }
1177: my ($role,$username,$domain,$section)=split(/\:/,$_);
1178: my $key=&plaintext($role);
1179: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1180: if ($returnhash{$key}) {
1181: $returnhash{$key}.=','.$username.':'.$domain;
1182: } else {
1183: $returnhash{$key}=$username.':'.$domain;
1184: }
1185: }
1186: return sort %returnhash;
1187: }
1188:
1189: # ---------------------------------------------------------- Course ID routines
1190: # Deal with domain's nohist_courseid.db files
1191: #
1192:
1193: sub courseidput {
1194: my ($domain,$what,$coursehome)=@_;
1195: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1196: }
1197:
1198: sub courseiddump {
1199: my ($domfilter,$descfilter,$sincefilter)=@_;
1200: my %returnhash=();
1201: foreach my $tryserver (keys %libserv) {
1202: if ($hostdom{$tryserver}=~/$domfilter/) {
1203: foreach (
1204: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1205: $sincefilter.':'.&escape($descfilter)))) {
1206: my ($key,$value)=split(/\=/,$_);
1207: if (($key) && ($value)) {
1208: $returnhash{&unescape($key)}=&unescape($value);
1209: }
1210: }
1211:
1212: }
1213: }
1214: return %returnhash;
1215: }
1216:
1217: #
1218: # ----------------------------------------------------------- Check out an item
1219:
1220: sub checkout {
1221: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1222: my $now=time;
1223: my $lonhost=$perlvar{'lonHostID'};
1224: my $infostr=&escape(
1225: 'CHECKOUTTOKEN&'.
1226: $tuname.'&'.
1227: $tudom.'&'.
1228: $tcrsid.'&'.
1229: $symb.'&'.
1230: $now.'&'.$ENV{'REMOTE_ADDR'});
1231: my $token=&reply('tmpput:'.$infostr,$lonhost);
1232: if ($token=~/^error\:/) {
1233: &logthis("<font color=blue>WARNING: ".
1234: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1235: "</font>");
1236: return '';
1237: }
1238:
1239: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1240: $token=~tr/a-z/A-Z/;
1241:
1242: my %infohash=('resource.0.outtoken' => $token,
1243: 'resource.0.checkouttime' => $now,
1244: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1245:
1246: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1247: return '';
1248: } else {
1249: &logthis("<font color=blue>WARNING: ".
1250: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1251: "</font>");
1252: }
1253:
1254: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1255: &escape('Checkout '.$infostr.' - '.
1256: $token)) ne 'ok') {
1257: return '';
1258: } else {
1259: &logthis("<font color=blue>WARNING: ".
1260: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1261: "</font>");
1262: }
1263: return $token;
1264: }
1265:
1266: # ------------------------------------------------------------ Check in an item
1267:
1268: sub checkin {
1269: my $token=shift;
1270: my $now=time;
1271: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1272: $lonhost=~tr/A-Z/a-z/;
1273: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1274: $dtoken=~s/\W/\_/g;
1275: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1276: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1277:
1278: unless (($tuname) && ($tudom)) {
1279: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1280: return '';
1281: }
1282:
1283: unless (&allowed('mgr',$tcrsid)) {
1284: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1285: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1286: return '';
1287: }
1288:
1289: my %infohash=('resource.0.intoken' => $token,
1290: 'resource.0.checkintime' => $now,
1291: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1292:
1293: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1294: return '';
1295: }
1296:
1297: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1298: &escape('Checkin - '.$token)) ne 'ok') {
1299: return '';
1300: }
1301:
1302: return ($symb,$tuname,$tudom,$tcrsid);
1303: }
1304:
1305: # --------------------------------------------- Set Expire Date for Spreadsheet
1306:
1307: sub expirespread {
1308: my ($uname,$udom,$stype,$usymb)=@_;
1309: my $cid=$ENV{'request.course.id'};
1310: if ($cid) {
1311: my $now=time;
1312: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1313: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1314: $ENV{'course.'.$cid.'.num'}.
1315: ':nohist_expirationdates:'.
1316: &escape($key).'='.$now,
1317: $ENV{'course.'.$cid.'.home'})
1318: }
1319: return 'ok';
1320: }
1321:
1322: # ----------------------------------------------------- Devalidate Spreadsheets
1323:
1324: sub devalidate {
1325: my ($symb,$uname,$udom)=@_;
1326: my $cid=$ENV{'request.course.id'};
1327: if ($cid) {
1328: # delete the stored spreadsheets for
1329: # - the student level sheet of this user in course's homespace
1330: # - the assessment level sheet for this resource
1331: # for this user in user's homespace
1332: my $key=$uname.':'.$udom.':';
1333: my $status=
1334: &del('nohist_calculatedsheets',
1335: [$key.'studentcalc'],
1336: $ENV{'course.'.$cid.'.domain'},
1337: $ENV{'course.'.$cid.'.num'})
1338: .' '.
1339: &del('nohist_calculatedsheets_'.$cid,
1340: [$key.'assesscalc:'.$symb]);
1341: unless ($status eq 'ok ok') {
1342: &logthis('Could not devalidate spreadsheet '.
1343: $uname.' at '.$udom.' for '.
1344: $symb.': '.$status);
1345: }
1346: }
1347: }
1348:
1349: sub get_scalar {
1350: my ($string,$end) = @_;
1351: my $value;
1352: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1353: $value = $1;
1354: } elsif ($$string =~ s/^([^&]*?)&//) {
1355: $value = $1;
1356: }
1357: return &unescape($value);
1358: }
1359:
1360: sub array2str {
1361: my (@array) = @_;
1362: my $result=&arrayref2str(\@array);
1363: $result=~s/^__ARRAY_REF__//;
1364: $result=~s/__END_ARRAY_REF__$//;
1365: return $result;
1366: }
1367:
1368: sub arrayref2str {
1369: my ($arrayref) = @_;
1370: my $result='__ARRAY_REF__';
1371: foreach my $elem (@$arrayref) {
1372: if(ref($elem) eq 'ARRAY') {
1373: $result.=&arrayref2str($elem).'&';
1374: } elsif(ref($elem) eq 'HASH') {
1375: $result.=&hashref2str($elem).'&';
1376: } elsif(ref($elem)) {
1377: #print("Got a ref of ".(ref($elem))." skipping.");
1378: } else {
1379: $result.=&escape($elem).'&';
1380: }
1381: }
1382: $result=~s/\&$//;
1383: $result .= '__END_ARRAY_REF__';
1384: return $result;
1385: }
1386:
1387: sub hash2str {
1388: my (%hash) = @_;
1389: my $result=&hashref2str(\%hash);
1390: $result=~s/^__HASH_REF__//;
1391: $result=~s/__END_HASH_REF__$//;
1392: return $result;
1393: }
1394:
1395: sub hashref2str {
1396: my ($hashref)=@_;
1397: my $result='__HASH_REF__';
1398: foreach (keys(%$hashref)) {
1399: if (ref($_) eq 'ARRAY') {
1400: $result.=&arrayref2str($_).'=';
1401: } elsif (ref($_) eq 'HASH') {
1402: $result.=&hashref2str($_).'=';
1403: } elsif (ref($_)) {
1404: $result.='=';
1405: #print("Got a ref of ".(ref($_))." skipping.");
1406: } else {
1407: if ($_) {$result.=&escape($_).'=';} else { last; }
1408: }
1409:
1410: if(ref($hashref->{$_}) eq 'ARRAY') {
1411: $result.=&arrayref2str($hashref->{$_}).'&';
1412: } elsif(ref($hashref->{$_}) eq 'HASH') {
1413: $result.=&hashref2str($hashref->{$_}).'&';
1414: } elsif(ref($hashref->{$_})) {
1415: $result.='&';
1416: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1417: } else {
1418: $result.=&escape($hashref->{$_}).'&';
1419: }
1420: }
1421: $result=~s/\&$//;
1422: $result .= '__END_HASH_REF__';
1423: return $result;
1424: }
1425:
1426: sub str2hash {
1427: my ($string)=@_;
1428: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1429: return %$hash;
1430: }
1431:
1432: sub str2hashref {
1433: my ($string) = @_;
1434:
1435: my %hash;
1436:
1437: if($string !~ /^__HASH_REF__/) {
1438: if (! ($string eq '' || !defined($string))) {
1439: $hash{'error'}='Not hash reference';
1440: }
1441: return (\%hash, $string);
1442: }
1443:
1444: $string =~ s/^__HASH_REF__//;
1445:
1446: while($string !~ /^__END_HASH_REF__/) {
1447: #key
1448: my $key='';
1449: if($string =~ /^__HASH_REF__/) {
1450: ($key, $string)=&str2hashref($string);
1451: if(defined($key->{'error'})) {
1452: $hash{'error'}='Bad data';
1453: return (\%hash, $string);
1454: }
1455: } elsif($string =~ /^__ARRAY_REF__/) {
1456: ($key, $string)=&str2arrayref($string);
1457: if($key->[0] eq 'Array reference error') {
1458: $hash{'error'}='Bad data';
1459: return (\%hash, $string);
1460: }
1461: } else {
1462: $string =~ s/^(.*?)=//;
1463: $key=&unescape($1);
1464: }
1465: $string =~ s/^=//;
1466:
1467: #value
1468: my $value='';
1469: if($string =~ /^__HASH_REF__/) {
1470: ($value, $string)=&str2hashref($string);
1471: if(defined($value->{'error'})) {
1472: $hash{'error'}='Bad data';
1473: return (\%hash, $string);
1474: }
1475: } elsif($string =~ /^__ARRAY_REF__/) {
1476: ($value, $string)=&str2arrayref($string);
1477: if($value->[0] eq 'Array reference error') {
1478: $hash{'error'}='Bad data';
1479: return (\%hash, $string);
1480: }
1481: } else {
1482: $value=&get_scalar(\$string,'__END_HASH_REF__');
1483: }
1484: $string =~ s/^&//;
1485:
1486: $hash{$key}=$value;
1487: }
1488:
1489: $string =~ s/^__END_HASH_REF__//;
1490:
1491: return (\%hash, $string);
1492: }
1493:
1494: sub str2array {
1495: my ($string)=@_;
1496: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1497: return @$array;
1498: }
1499:
1500: sub str2arrayref {
1501: my ($string) = @_;
1502: my @array;
1503:
1504: if($string !~ /^__ARRAY_REF__/) {
1505: if (! ($string eq '' || !defined($string))) {
1506: $array[0]='Array reference error';
1507: }
1508: return (\@array, $string);
1509: }
1510:
1511: $string =~ s/^__ARRAY_REF__//;
1512:
1513: while($string !~ /^__END_ARRAY_REF__/) {
1514: my $value='';
1515: if($string =~ /^__HASH_REF__/) {
1516: ($value, $string)=&str2hashref($string);
1517: if(defined($value->{'error'})) {
1518: $array[0] ='Array reference error';
1519: return (\@array, $string);
1520: }
1521: } elsif($string =~ /^__ARRAY_REF__/) {
1522: ($value, $string)=&str2arrayref($string);
1523: if($value->[0] eq 'Array reference error') {
1524: $array[0] ='Array reference error';
1525: return (\@array, $string);
1526: }
1527: } else {
1528: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1529: }
1530: $string =~ s/^&//;
1531:
1532: push(@array, $value);
1533: }
1534:
1535: $string =~ s/^__END_ARRAY_REF__//;
1536:
1537: return (\@array, $string);
1538: }
1539:
1540: # -------------------------------------------------------------------Temp Store
1541:
1542: sub tmpreset {
1543: my ($symb,$namespace,$domain,$stuname) = @_;
1544: if (!$symb) {
1545: $symb=&symbread();
1546: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1547: }
1548: $symb=escape($symb);
1549:
1550: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1551: $namespace=~s/\//\_/g;
1552: $namespace=~s/\W//g;
1553:
1554: #FIXME needs to do something for /pub resources
1555: if (!$domain) { $domain=$ENV{'user.domain'}; }
1556: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1557: my $path=$perlvar{'lonDaemons'}.'/tmp';
1558: my %hash;
1559: if (tie(%hash,'GDBM_File',
1560: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1561: &GDBM_WRCREAT(),0640)) {
1562: foreach my $key (keys %hash) {
1563: if ($key=~ /:$symb/) {
1564: delete($hash{$key});
1565: }
1566: }
1567: }
1568: }
1569:
1570: sub tmpstore {
1571: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1572:
1573: if (!$symb) {
1574: $symb=&symbread();
1575: if (!$symb) { $symb= $ENV{'request.url'}; }
1576: }
1577: $symb=escape($symb);
1578:
1579: if (!$namespace) {
1580: # I don't think we would ever want to store this for a course.
1581: # it seems this will only be used if we don't have a course.
1582: #$namespace=$ENV{'request.course.id'};
1583: #if (!$namespace) {
1584: $namespace=$ENV{'request.state'};
1585: #}
1586: }
1587: $namespace=~s/\//\_/g;
1588: $namespace=~s/\W//g;
1589: #FIXME needs to do something for /pub resources
1590: if (!$domain) { $domain=$ENV{'user.domain'}; }
1591: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1592: my $now=time;
1593: my %hash;
1594: my $path=$perlvar{'lonDaemons'}.'/tmp';
1595: if (tie(%hash,'GDBM_File',
1596: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1597: &GDBM_WRCREAT(),0640)) {
1598: $hash{"version:$symb"}++;
1599: my $version=$hash{"version:$symb"};
1600: my $allkeys='';
1601: foreach my $key (keys(%$storehash)) {
1602: $allkeys.=$key.':';
1603: $hash{"$version:$symb:$key"}=$$storehash{$key};
1604: }
1605: $hash{"$version:$symb:timestamp"}=$now;
1606: $allkeys.='timestamp';
1607: $hash{"$version:keys:$symb"}=$allkeys;
1608: if (untie(%hash)) {
1609: return 'ok';
1610: } else {
1611: return "error:$!";
1612: }
1613: } else {
1614: return "error:$!";
1615: }
1616: }
1617:
1618: # -----------------------------------------------------------------Temp Restore
1619:
1620: sub tmprestore {
1621: my ($symb,$namespace,$domain,$stuname) = @_;
1622:
1623: if (!$symb) {
1624: $symb=&symbread();
1625: if (!$symb) { $symb= $ENV{'request.url'}; }
1626: }
1627: $symb=escape($symb);
1628:
1629: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1630: #FIXME needs to do something for /pub resources
1631: if (!$domain) { $domain=$ENV{'user.domain'}; }
1632: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1633:
1634: my %returnhash;
1635: $namespace=~s/\//\_/g;
1636: $namespace=~s/\W//g;
1637: my %hash;
1638: my $path=$perlvar{'lonDaemons'}.'/tmp';
1639: if (tie(%hash,'GDBM_File',
1640: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1641: &GDBM_READER(),0640)) {
1642: my $version=$hash{"version:$symb"};
1643: $returnhash{'version'}=$version;
1644: my $scope;
1645: for ($scope=1;$scope<=$version;$scope++) {
1646: my $vkeys=$hash{"$scope:keys:$symb"};
1647: my @keys=split(/:/,$vkeys);
1648: my $key;
1649: $returnhash{"$scope:keys"}=$vkeys;
1650: foreach $key (@keys) {
1651: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1652: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1653: }
1654: }
1655: if (!(untie(%hash))) {
1656: return "error:$!";
1657: }
1658: } else {
1659: return "error:$!";
1660: }
1661: return %returnhash;
1662: }
1663:
1664: # ----------------------------------------------------------------------- Store
1665:
1666: sub store {
1667: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1668: my $home='';
1669:
1670: if ($stuname) { $home=&homeserver($stuname,$domain); }
1671:
1672: $symb=&symbclean($symb);
1673: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1674:
1675: if (!$domain) { $domain=$ENV{'user.domain'}; }
1676: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1677:
1678: &devalidate($symb,$stuname,$domain);
1679:
1680: $symb=escape($symb);
1681: if (!$namespace) {
1682: unless ($namespace=$ENV{'request.course.id'}) {
1683: return '';
1684: }
1685: }
1686: if (!$home) { $home=$ENV{'user.home'}; }
1687: my $namevalue='';
1688: foreach (keys %$storehash) {
1689: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1690: }
1691: $namevalue=~s/\&$//;
1692: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1693: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1694: }
1695:
1696: # -------------------------------------------------------------- Critical Store
1697:
1698: sub cstore {
1699: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1700: my $home='';
1701:
1702: if ($stuname) { $home=&homeserver($stuname,$domain); }
1703:
1704: $symb=&symbclean($symb);
1705: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1706:
1707: if (!$domain) { $domain=$ENV{'user.domain'}; }
1708: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1709:
1710: &devalidate($symb,$stuname,$domain);
1711:
1712: $symb=escape($symb);
1713: if (!$namespace) {
1714: unless ($namespace=$ENV{'request.course.id'}) {
1715: return '';
1716: }
1717: }
1718: if (!$home) { $home=$ENV{'user.home'}; }
1719:
1720: my $namevalue='';
1721: foreach (keys %$storehash) {
1722: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1723: }
1724: $namevalue=~s/\&$//;
1725: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1726: return critical
1727: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1728: }
1729:
1730: # --------------------------------------------------------------------- Restore
1731:
1732: sub restore {
1733: my ($symb,$namespace,$domain,$stuname) = @_;
1734: my $home='';
1735:
1736: if ($stuname) { $home=&homeserver($stuname,$domain); }
1737:
1738: if (!$symb) {
1739: unless ($symb=escape(&symbread())) { return ''; }
1740: } else {
1741: $symb=&escape(&symbclean($symb));
1742: }
1743: if (!$namespace) {
1744: unless ($namespace=$ENV{'request.course.id'}) {
1745: return '';
1746: }
1747: }
1748: if (!$domain) { $domain=$ENV{'user.domain'}; }
1749: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1750: if (!$home) { $home=$ENV{'user.home'}; }
1751: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1752:
1753: my %returnhash=();
1754: foreach (split(/\&/,$answer)) {
1755: my ($name,$value)=split(/\=/,$_);
1756: $returnhash{&unescape($name)}=&unescape($value);
1757: }
1758: my $version;
1759: for ($version=1;$version<=$returnhash{'version'};$version++) {
1760: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1761: $returnhash{$_}=$returnhash{$version.':'.$_};
1762: }
1763: }
1764: return %returnhash;
1765: }
1766:
1767: # ---------------------------------------------------------- Course Description
1768:
1769: sub coursedescription {
1770: my $courseid=shift;
1771: $courseid=~s/^\///;
1772: $courseid=~s/\_/\//g;
1773: my ($cdomain,$cnum)=split(/\//,$courseid);
1774: my $chome=&homeserver($cnum,$cdomain);
1775: my $normalid=$cdomain.'_'.$cnum;
1776: # need to always cache even if we get errors otherwise we keep
1777: # trying and trying and trying to get the course description.
1778: my %envhash=();
1779: my %returnhash=();
1780: $envhash{'course.'.$normalid.'.last_cache'}=time;
1781: if ($chome ne 'no_host') {
1782: %returnhash=&dump('environment',$cdomain,$cnum);
1783: if (!exists($returnhash{'con_lost'})) {
1784: $returnhash{'home'}= $chome;
1785: $returnhash{'domain'} = $cdomain;
1786: $returnhash{'num'} = $cnum;
1787: while (my ($name,$value) = each %returnhash) {
1788: $envhash{'course.'.$normalid.'.'.$name}=$value;
1789: }
1790: $returnhash{'url'}=&clutter($returnhash{'url'});
1791: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1792: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1793: $envhash{'course.'.$normalid.'.home'}=$chome;
1794: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1795: $envhash{'course.'.$normalid.'.num'}=$cnum;
1796: }
1797: }
1798: &appenv(%envhash);
1799: return %returnhash;
1800: }
1801:
1802: # -------------------------------------------------------- Get user privileges
1803:
1804: sub rolesinit {
1805: my ($domain,$username,$authhost)=@_;
1806: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1807: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1808: my %allroles=();
1809: my %thesepriv=();
1810: my $now=time;
1811: my $userroles="user.login.time=$now\n";
1812: my $thesestr;
1813:
1814: if ($rolesdump ne '') {
1815: foreach (split(/&/,$rolesdump)) {
1816: if ($_!~/^rolesdef\&/) {
1817: my ($area,$role)=split(/=/,$_);
1818: $area=~s/\_\w\w$//;
1819: my ($trole,$tend,$tstart)=split(/_/,$role);
1820: $userroles.='user.role.'.$trole.'.'.$area.'='.
1821: $tstart.'.'.$tend."\n";
1822: # log the associated role with the area
1823: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
1824: if ($tend!=0) {
1825: if ($tend<$now) {
1826: $trole='';
1827: }
1828: }
1829: if ($tstart!=0) {
1830: if ($tstart>$now) {
1831: $trole='';
1832: }
1833: }
1834: if (($area ne '') && ($trole ne '')) {
1835: my $spec=$trole.'.'.$area;
1836: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1837: if ($trole =~ /^cr\//) {
1838: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1839: my $homsvr=homeserver($rauthor,$rdomain);
1840: if ($hostname{$homsvr} ne '') {
1841: my $roledef=
1842: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1843: $homsvr);
1844: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1845: my ($syspriv,$dompriv,$coursepriv)=
1846: split(/\_/,unescape($roledef));
1847: if (defined($syspriv)) {
1848: $allroles{'cm./'}.=':'.$syspriv;
1849: $allroles{$spec.'./'}.=':'.$syspriv;
1850: }
1851: if ($tdomain ne '') {
1852: if (defined($dompriv)) {
1853: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1854: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1855: }
1856: if ($trest ne '') {
1857: if (defined($coursepriv)) {
1858: $allroles{'cm.'.$area}.=':'.$coursepriv;
1859: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1860: }
1861: }
1862: }
1863: }
1864: }
1865: } else {
1866: if (defined($pr{$trole.':s'})) {
1867: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1868: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1869: }
1870: if ($tdomain ne '') {
1871: if (defined($pr{$trole.':d'})) {
1872: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1873: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1874: }
1875: if ($trest ne '') {
1876: if (defined($pr{$trole.':c'})) {
1877: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1878: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1879: }
1880: }
1881: }
1882: }
1883: }
1884: }
1885: }
1886: my $adv=0;
1887: my $author=0;
1888: foreach (keys %allroles) {
1889: %thesepriv=();
1890: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1891: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1892: foreach (split(/:/,$allroles{$_})) {
1893: if ($_ ne '') {
1894: my ($privilege,$restrictions)=split(/&/,$_);
1895: if ($restrictions eq '') {
1896: $thesepriv{$privilege}='F';
1897: } else {
1898: if ($thesepriv{$privilege} ne 'F') {
1899: $thesepriv{$privilege}.=$restrictions;
1900: }
1901: }
1902: }
1903: }
1904: $thesestr='';
1905: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1906: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1907: }
1908: $userroles.='user.adv='.$adv."\n".
1909: 'user.author='.$author."\n";
1910: $ENV{'user.adv'}=$adv;
1911: }
1912: return $userroles;
1913: }
1914:
1915: # --------------------------------------------------------------- get interface
1916:
1917: sub get {
1918: my ($namespace,$storearr,$udomain,$uname)=@_;
1919: my $items='';
1920: foreach (@$storearr) {
1921: $items.=escape($_).'&';
1922: }
1923: $items=~s/\&$//;
1924: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1925: if (!$uname) { $uname=$ENV{'user.name'}; }
1926: my $uhome=&homeserver($uname,$udomain);
1927:
1928: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1929: my @pairs=split(/\&/,$rep);
1930: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
1931: return @pairs;
1932: }
1933: my %returnhash=();
1934: my $i=0;
1935: foreach (@$storearr) {
1936: $returnhash{$_}=unescape($pairs[$i]);
1937: $i++;
1938: }
1939: return %returnhash;
1940: }
1941:
1942: # --------------------------------------------------------------- del interface
1943:
1944: sub del {
1945: my ($namespace,$storearr,$udomain,$uname)=@_;
1946: my $items='';
1947: foreach (@$storearr) {
1948: $items.=escape($_).'&';
1949: }
1950: $items=~s/\&$//;
1951: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1952: if (!$uname) { $uname=$ENV{'user.name'}; }
1953: my $uhome=&homeserver($uname,$udomain);
1954:
1955: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1956: }
1957:
1958: # -------------------------------------------------------------- dump interface
1959:
1960: sub dump {
1961: my ($namespace,$udomain,$uname,$regexp)=@_;
1962: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1963: if (!$uname) { $uname=$ENV{'user.name'}; }
1964: my $uhome=&homeserver($uname,$udomain);
1965: if ($regexp) {
1966: $regexp=&escape($regexp);
1967: } else {
1968: $regexp='.';
1969: }
1970: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1971: my @pairs=split(/\&/,$rep);
1972: my %returnhash=();
1973: foreach (@pairs) {
1974: my ($key,$value)=split(/=/,$_);
1975: $returnhash{unescape($key)}=unescape($value);
1976: }
1977: return %returnhash;
1978: }
1979:
1980: # --------------------------------------------------------------- currentdump
1981: sub currentdump {
1982: my ($courseid,$sdom,$sname)=@_;
1983: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1984: $sdom = $ENV{'user.domain'} if (! defined($sdom));
1985: $sname = $ENV{'user.name'} if (! defined($sname));
1986: my $uhome = &homeserver($sname,$sdom);
1987: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
1988: return if ($rep =~ /^(error:|no_such_host)/);
1989: #
1990: my %returnhash=();
1991: #
1992: if ($rep eq "unknown_cmd") {
1993: # an old lond will not know currentdump
1994: # Do a dump and make it look like a currentdump
1995: my @tmp = &dump($courseid,$sdom,$sname,'.');
1996: return if ($tmp[0] =~ /^(error:|no_such_host)/);
1997: my %hash = @tmp;
1998: @tmp=();
1999: # Code ripped from lond, essentially. The only difference
2000: # here is the unescaping done by lonnet::dump(). Conceivably
2001: # we might run in to problems with parameter names =~ /^v\./
2002: while (my ($key,$value) = each(%hash)) {
2003: my ($v,$symb,$param) = split(/:/,$key);
2004: next if ($v eq 'version' || $symb eq 'keys');
2005: next if (exists($returnhash{$symb}) &&
2006: exists($returnhash{$symb}->{$param}) &&
2007: $returnhash{$symb}->{'v.'.$param} > $v);
2008: $returnhash{$symb}->{$param}=$value;
2009: $returnhash{$symb}->{'v.'.$param}=$v;
2010: }
2011: #
2012: # Remove all of the keys in the hashes which keep track of
2013: # the version of the parameter.
2014: while (my ($symb,$param_hash) = each(%returnhash)) {
2015: # use a foreach because we are going to delete from the hash.
2016: foreach my $key (keys(%$param_hash)) {
2017: delete($param_hash->{$key}) if ($key =~ /^v\./);
2018: }
2019: }
2020: } else {
2021: my @pairs=split(/\&/,$rep);
2022: foreach (@pairs) {
2023: my ($key,$value)=split(/=/,$_);
2024: my ($symb,$param) = split(/:/,$key);
2025: $returnhash{&unescape($symb)}->{&unescape($param)} =
2026: &unescape($value);
2027: }
2028: }
2029: return %returnhash;
2030: }
2031:
2032: # --------------------------------------------------------------- put interface
2033:
2034: sub put {
2035: my ($namespace,$storehash,$udomain,$uname)=@_;
2036: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2037: if (!$uname) { $uname=$ENV{'user.name'}; }
2038: my $uhome=&homeserver($uname,$udomain);
2039: my $items='';
2040: foreach (keys %$storehash) {
2041: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
2042: }
2043: $items=~s/\&$//;
2044: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2045: }
2046:
2047: # ------------------------------------------------------ critical put interface
2048:
2049: sub cput {
2050: my ($namespace,$storehash,$udomain,$uname)=@_;
2051: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2052: if (!$uname) { $uname=$ENV{'user.name'}; }
2053: my $uhome=&homeserver($uname,$udomain);
2054: my $items='';
2055: foreach (keys %$storehash) {
2056: $items.=escape($_).'='.escape($$storehash{$_}).'&';
2057: }
2058: $items=~s/\&$//;
2059: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2060: }
2061:
2062: # -------------------------------------------------------------- eget interface
2063:
2064: sub eget {
2065: my ($namespace,$storearr,$udomain,$uname)=@_;
2066: my $items='';
2067: foreach (@$storearr) {
2068: $items.=escape($_).'&';
2069: }
2070: $items=~s/\&$//;
2071: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2072: if (!$uname) { $uname=$ENV{'user.name'}; }
2073: my $uhome=&homeserver($uname,$udomain);
2074: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2075: my @pairs=split(/\&/,$rep);
2076: my %returnhash=();
2077: my $i=0;
2078: foreach (@$storearr) {
2079: $returnhash{$_}=unescape($pairs[$i]);
2080: $i++;
2081: }
2082: return %returnhash;
2083: }
2084:
2085: # ---------------------------------------------- Custom access rule evaluation
2086:
2087: sub customaccess {
2088: my ($priv,$uri)=@_;
2089: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2090: $urealm=~s/^\W//;
2091: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2092: my $access=0;
2093: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2094: my ($effect,$realm,$role)=split(/\:/,$_);
2095: if ($role) {
2096: if ($role ne $urole) { next; }
2097: }
2098: foreach (split(/\s*\,\s*/,$realm)) {
2099: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2100: if ($tdom) {
2101: if ($tdom ne $udom) { next; }
2102: }
2103: if ($tcrs) {
2104: if ($tcrs ne $ucrs) { next; }
2105: }
2106: if ($tsec) {
2107: if ($tsec ne $usec) { next; }
2108: }
2109: $access=($effect eq 'allow');
2110: last;
2111: }
2112: }
2113: return $access;
2114: }
2115:
2116: # ------------------------------------------------- Check for a user privilege
2117:
2118: sub allowed {
2119: my ($priv,$uri)=@_;
2120:
2121: my $orguri=$uri;
2122: $uri=&declutter($uri);
2123:
2124: # Free bre access to adm and meta resources
2125:
2126: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2127: return 'F';
2128: }
2129:
2130: # Free bre to public access
2131:
2132: if ($priv eq 'bre') {
2133: my $copyright=&metadata($uri,'copyright');
2134: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2135: return 'F';
2136: }
2137: if ($copyright eq 'priv') {
2138: $uri=~/([^\/]+)\/([^\/]+)\//;
2139: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2140: return '';
2141: }
2142: }
2143: if ($copyright eq 'domain') {
2144: $uri=~/([^\/]+)\/([^\/]+)\//;
2145: unless (($ENV{'user.domain'} eq $1) ||
2146: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2147: return '';
2148: }
2149: }
2150: if ($ENV{'request.role'}=~ /li\.\//) {
2151: # Library role, so allow browsing of resources in this domain.
2152: return 'F';
2153: }
2154: if ($copyright eq 'custom') {
2155: unless (&customaccess($priv,$uri)) { return ''; }
2156: }
2157: }
2158: # Domain coordinator is trying to create a course
2159: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2160: # uri is the requested domain in this case.
2161: # comparison to 'request.role.domain' shows if the user has selected
2162: # a role of dc for the domain in question.
2163: return 'F' if ($uri eq $ENV{'request.role.domain'});
2164: }
2165:
2166: my $thisallowed='';
2167: my $statecond=0;
2168: my $courseprivid='';
2169:
2170: # Course
2171:
2172: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
2173: $thisallowed.=$1;
2174: }
2175:
2176: # Domain
2177:
2178: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2179: =~/$priv\&([^\:]*)/) {
2180: $thisallowed.=$1;
2181: }
2182:
2183: # Course: uri itself is a course
2184: my $courseuri=$uri;
2185: $courseuri=~s/\_(\d)/\/$1/;
2186: $courseuri=~s/^([^\/])/\/$1/;
2187:
2188: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2189: =~/$priv\&([^\:]*)/) {
2190: $thisallowed.=$1;
2191: }
2192:
2193: # URI is an uploaded document for this course
2194:
2195: if (($priv eq 'bre') &&
2196: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2197: return 'F';
2198: }
2199: # Full access at system, domain or course-wide level? Exit.
2200:
2201: if ($thisallowed=~/F/) {
2202: return 'F';
2203: }
2204:
2205: # If this is generating or modifying users, exit with special codes
2206:
2207: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
2208: return $thisallowed;
2209: }
2210: #
2211: # Gathered so far: system, domain and course wide privileges
2212: #
2213: # Course: See if uri or referer is an individual resource that is part of
2214: # the course
2215:
2216: if ($ENV{'request.course.id'}) {
2217:
2218: $courseprivid=$ENV{'request.course.id'};
2219: if ($ENV{'request.course.sec'}) {
2220: $courseprivid.='/'.$ENV{'request.course.sec'};
2221: }
2222: $courseprivid=~s/\_/\//;
2223: my $checkreferer=1;
2224: my ($match,$cond)=&is_on_map($uri);
2225: if ($match) {
2226: $statecond=$cond;
2227: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2228: =~/$priv\&([^\:]*)/) {
2229: $thisallowed.=$1;
2230: $checkreferer=0;
2231: }
2232: }
2233:
2234: if ($checkreferer) {
2235: my $refuri=$ENV{'httpref.'.$orguri};
2236: unless ($refuri) {
2237: foreach (keys %ENV) {
2238: if ($_=~/^httpref\..*\*/) {
2239: my $pattern=$_;
2240: $pattern=~s/^httpref\.\/res\///;
2241: $pattern=~s/\*/\[\^\/\]\+/g;
2242: $pattern=~s/\//\\\//g;
2243: if ($orguri=~/$pattern/) {
2244: $refuri=$ENV{$_};
2245: }
2246: }
2247: }
2248: }
2249:
2250: if ($refuri) {
2251: $refuri=&declutter($refuri);
2252: my ($match,$cond)=&is_on_map($refuri);
2253: if ($match) {
2254: my $refstatecond=$cond;
2255: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2256: =~/$priv\&([^\:]*)/) {
2257: $thisallowed.=$1;
2258: $uri=$refuri;
2259: $statecond=$refstatecond;
2260: }
2261: }
2262: }
2263: }
2264: }
2265:
2266: #
2267: # Gathered now: all privileges that could apply, and condition number
2268: #
2269: #
2270: # Full or no access?
2271: #
2272:
2273: if ($thisallowed=~/F/) {
2274: return 'F';
2275: }
2276:
2277: unless ($thisallowed) {
2278: return '';
2279: }
2280:
2281: # Restrictions exist, deal with them
2282: #
2283: # C:according to course preferences
2284: # R:according to resource settings
2285: # L:unless locked
2286: # X:according to user session state
2287: #
2288:
2289: # Possibly locked functionality, check all courses
2290: # Locks might take effect only after 10 minutes cache expiration for other
2291: # courses, and 2 minutes for current course
2292:
2293: my $envkey;
2294: if ($thisallowed=~/L/) {
2295: foreach $envkey (keys %ENV) {
2296: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2297: my $courseid=$2;
2298: my $roleid=$1.'.'.$2;
2299: $courseid=~s/^\///;
2300: my $expiretime=600;
2301: if ($ENV{'request.role'} eq $roleid) {
2302: $expiretime=120;
2303: }
2304: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2305: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2306: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2307: &coursedescription($courseid);
2308: }
2309: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2310: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2311: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2312: &log($ENV{'user.domain'},$ENV{'user.name'},
2313: $ENV{'user.home'},
2314: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2315: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2316: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2317: return '';
2318: }
2319: }
2320: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2321: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2322: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2323: &log($ENV{'user.domain'},$ENV{'user.name'},
2324: $ENV{'user.home'},
2325: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2326: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2327: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2328: return '';
2329: }
2330: }
2331: }
2332: }
2333: }
2334:
2335: #
2336: # Rest of the restrictions depend on selected course
2337: #
2338:
2339: unless ($ENV{'request.course.id'}) {
2340: return '1';
2341: }
2342:
2343: #
2344: # Now user is definitely in a course
2345: #
2346:
2347:
2348: # Course preferences
2349:
2350: if ($thisallowed=~/C/) {
2351: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2352: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2353: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2354: =~/$rolecode/) {
2355: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2356: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2357: $ENV{'request.course.id'});
2358: return '';
2359: }
2360:
2361: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2362: =~/$unamedom/) {
2363: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2364: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2365: $ENV{'request.course.id'});
2366: return '';
2367: }
2368: }
2369:
2370: # Resource preferences
2371:
2372: if ($thisallowed=~/R/) {
2373: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2374: if (&metadata($uri,'roledeny')=~/$rolecode/) {
2375: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2376: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2377: return '';
2378: }
2379: }
2380:
2381: # Restricted by state or randomout?
2382:
2383: if ($thisallowed=~/X/) {
2384: if ($ENV{'acc.randomout'}) {
2385: my $symb=&symbread($uri,1);
2386: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2387: return '';
2388: }
2389: }
2390: if (&condval($statecond)) {
2391: return '2';
2392: } else {
2393: return '';
2394: }
2395: }
2396:
2397: return 'F';
2398: }
2399:
2400: # --------------------------------------------------- Is a resource on the map?
2401:
2402: sub is_on_map {
2403: my $uri=&declutter(shift);
2404: my @uriparts=split(/\//,$uri);
2405: my $filename=$uriparts[$#uriparts];
2406: my $pathname=$uri;
2407: $pathname=~s|/\Q$filename\E$||;
2408: $pathname=~s/^adm\/wrapper\///;
2409: #Trying to find the conditional for the file
2410: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2411: /\&\Q$filename\E\:([\d\|]+)\&/);
2412: if ($match) {
2413: return (1,$1);
2414: } else {
2415: return (0,0);
2416: }
2417: }
2418:
2419: # ----------------------------------------------------------------- Define Role
2420:
2421: sub definerole {
2422: if (allowed('mcr','/')) {
2423: my ($rolename,$sysrole,$domrole,$courole)=@_;
2424: foreach (split('/',$sysrole)) {
2425: my ($crole,$cqual)=split(/\&/,$_);
2426: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2427: if ($pr{'cr:s'}=~/$crole\&/) {
2428: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2429: return "refused:s:$crole&$cqual";
2430: }
2431: }
2432: }
2433: foreach (split('/',$domrole)) {
2434: my ($crole,$cqual)=split(/\&/,$_);
2435: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2436: if ($pr{'cr:d'}=~/$crole\&/) {
2437: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2438: return "refused:d:$crole&$cqual";
2439: }
2440: }
2441: }
2442: foreach (split('/',$courole)) {
2443: my ($crole,$cqual)=split(/\&/,$_);
2444: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2445: if ($pr{'cr:c'}=~/$crole\&/) {
2446: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2447: return "refused:c:$crole&$cqual";
2448: }
2449: }
2450: }
2451: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2452: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2453: "rolesdef_$rolename=".
2454: escape($sysrole.'_'.$domrole.'_'.$courole);
2455: return reply($command,$ENV{'user.home'});
2456: } else {
2457: return 'refused';
2458: }
2459: }
2460:
2461: # ---------------- Make a metadata query against the network of library servers
2462:
2463: sub metadata_query {
2464: my ($query,$custom,$customshow,$server_array)=@_;
2465: my %rhash;
2466: my @server_list = (defined($server_array) ? @$server_array
2467: : keys(%libserv) );
2468: for my $server (@server_list) {
2469: unless ($custom or $customshow) {
2470: my $reply=&reply("querysend:".&escape($query),$server);
2471: $rhash{$server}=$reply;
2472: }
2473: else {
2474: my $reply=&reply("querysend:".&escape($query).':'.
2475: &escape($custom).':'.&escape($customshow),
2476: $server);
2477: $rhash{$server}=$reply;
2478: }
2479: }
2480: return \%rhash;
2481: }
2482:
2483: # ----------------------------------------- Send log queries and wait for reply
2484:
2485: sub log_query {
2486: my ($uname,$udom,$query,%filters)=@_;
2487: my $uhome=&homeserver($uname,$udom);
2488: if ($uhome eq 'no_host') { return 'error: no_host'; }
2489: my $uhost=$hostname{$uhome};
2490: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2491: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2492: $uhome);
2493: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2494: return get_query_reply($queryid);
2495: }
2496:
2497: sub get_query_reply {
2498: my $queryid=shift;
2499: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2500: my $reply='';
2501: for (1..100) {
2502: sleep 2;
2503: if (-e $replyfile.'.end') {
2504: if (my $fh=Apache::File->new($replyfile)) {
2505: $reply.=<$fh>;
2506: $fh->close;
2507: } else { return 'error: reply_file_error'; }
2508: return &unescape($reply);
2509: }
2510: }
2511: return 'timeout:'.$queryid;
2512: }
2513:
2514: sub courselog_query {
2515: #
2516: # possible filters:
2517: # url: url or symb
2518: # username
2519: # domain
2520: # action: view, submit, grade
2521: # start: timestamp
2522: # end: timestamp
2523: #
2524: my (%filters)=@_;
2525: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2526: if ($filters{'url'}) {
2527: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2528: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2529: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2530: }
2531: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2532: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2533: return &log_query($cname,$cdom,'courselog',%filters);
2534: }
2535:
2536: sub userlog_query {
2537: my ($uname,$udom,%filters)=@_;
2538: return &log_query($uname,$udom,'userlog',%filters);
2539: }
2540:
2541: # ------------------------------------------------------------------ Plain Text
2542:
2543: sub plaintext {
2544: my $short=shift;
2545: return $prp{$short};
2546: }
2547:
2548: # ----------------------------------------------------------------- Assign Role
2549:
2550: sub assignrole {
2551: my ($udom,$uname,$url,$role,$end,$start)=@_;
2552: my $mrole;
2553: if ($role =~ /^cr\//) {
2554: unless (&allowed('ccr',$url)) {
2555: &logthis('Refused custom assignrole: '.
2556: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2557: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2558: return 'refused';
2559: }
2560: $mrole='cr';
2561: } else {
2562: my $cwosec=$url;
2563: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2564: unless (&allowed('c'.$role,$cwosec)) {
2565: &logthis('Refused assignrole: '.
2566: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2567: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2568: return 'refused';
2569: }
2570: $mrole=$role;
2571: }
2572: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2573: "$udom:$uname:$url".'_'."$mrole=$role";
2574: if ($end) { $command.='_'.$end; }
2575: if ($start) {
2576: if ($end) {
2577: $command.='_'.$start;
2578: } else {
2579: $command.='_0_'.$start;
2580: }
2581: }
2582: my $answer=&reply($command,&homeserver($uname,$udom));
2583: if ($answer eq 'ok') {
2584: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
2585: }
2586: return $answer;
2587: }
2588:
2589: # -------------------------------------------------- Modify user authentication
2590: # Overrides without validation
2591:
2592: sub modifyuserauth {
2593: my ($udom,$uname,$umode,$upass)=@_;
2594: my $uhome=&homeserver($uname,$udom);
2595: unless (&allowed('mau',$udom)) { return 'refused'; }
2596: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2597: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2598: ' in domain '.$ENV{'request.role.domain'});
2599: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2600: &escape($upass),$uhome);
2601: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2602: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2603: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2604: &log($udom,,$uname,$uhome,
2605: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2606: $ENV{'user.name'}.', '.$umode.
2607: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2608: unless ($reply eq 'ok') {
2609: &logthis('Authentication mode error: '.$reply);
2610: return 'error: '.$reply;
2611: }
2612: return 'ok';
2613: }
2614:
2615: # --------------------------------------------------------------- Modify a user
2616:
2617: sub modifyuser {
2618: my ($udom, $uname, $uid,
2619: $umode, $upass, $first,
2620: $middle, $last, $gene,
2621: $forceid, $desiredhome)=@_;
2622: $udom=~s/\W//g;
2623: $uname=~s/\W//g;
2624: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2625: $umode.', '.$first.', '.$middle.', '.
2626: $last.', '.$gene.'(forceid: '.$forceid.')'.
2627: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2628: ' desiredhome not specified').
2629: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2630: ' in domain '.$ENV{'request.role.domain'});
2631: my $uhome=&homeserver($uname,$udom,'true');
2632: # ----------------------------------------------------------------- Create User
2633: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
2634: my $unhome='';
2635: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2636: $unhome = $desiredhome;
2637: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2638: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2639: } else { # load balancing routine for determining $unhome
2640: my $tryserver;
2641: my $loadm=10000000;
2642: foreach $tryserver (keys %libserv) {
2643: if ($hostdom{$tryserver} eq $udom) {
2644: my $answer=reply('load',$tryserver);
2645: if (($answer=~/\d+/) && ($answer<$loadm)) {
2646: $loadm=$answer;
2647: $unhome=$tryserver;
2648: }
2649: }
2650: }
2651: }
2652: if (($unhome eq '') || ($unhome eq 'no_host')) {
2653: return 'error: unable to find a home server for '.$uname.
2654: ' in domain '.$udom;
2655: }
2656: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2657: &escape($upass),$unhome);
2658: unless ($reply eq 'ok') {
2659: return 'error: '.$reply;
2660: }
2661: $uhome=&homeserver($uname,$udom,'true');
2662: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2663: return 'error: verify home';
2664: }
2665: } # End of creation of new user
2666: # ---------------------------------------------------------------------- Add ID
2667: if ($uid) {
2668: $uid=~tr/A-Z/a-z/;
2669: my %uidhash=&idrget($udom,$uname);
2670: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2671: && (!$forceid)) {
2672: unless ($uid eq $uidhash{$uname}) {
2673: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2674: }
2675: } else {
2676: &idput($udom,($uname => $uid));
2677: }
2678: }
2679: # -------------------------------------------------------------- Add names, etc
2680: my @tmp=&get('environment',
2681: ['firstname','middlename','lastname','generation'],
2682: $udom,$uname);
2683: my %names;
2684: if ($tmp[0] =~ m/^error:.*/) {
2685: %names=();
2686: } else {
2687: %names = @tmp;
2688: }
2689: if ($first) { $names{'firstname'} = $first; }
2690: if ($middle) { $names{'middlename'} = $middle; }
2691: if ($last) { $names{'lastname'} = $last; }
2692: if ($gene) { $names{'generation'} = $gene; }
2693: my $reply = &put('environment', \%names, $udom,$uname);
2694: if ($reply ne 'ok') { return 'error: '.$reply; }
2695: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2696: $umode.', '.$first.', '.$middle.', '.
2697: $last.', '.$gene.' by '.
2698: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2699: return 'ok';
2700: }
2701:
2702: # -------------------------------------------------------------- Modify student
2703:
2704: sub modifystudent {
2705: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2706: $end,$start,$forceid,$desiredhome)=@_;
2707: my $cid='';
2708: unless ($cid=$ENV{'request.course.id'}) {
2709: return 'not_in_class';
2710: }
2711: # --------------------------------------------------------------- Make the user
2712: my $reply=&modifyuser
2713: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2714: $desiredhome);
2715: unless ($reply eq 'ok') { return $reply; }
2716: # This will cause &modify_student_enrollment to get the uid from the
2717: # students environment
2718: $uid = undef if (!$forceid);
2719: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
2720: $last,$gene,$usec,$end,$start);
2721: return $reply;
2722: }
2723:
2724: sub modify_student_enrollment {
2725: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
2726: # Get the course id from the environment
2727: my $cid='';
2728: unless ($cid=$ENV{'request.course.id'}) {
2729: return 'not_in_class';
2730: }
2731: # Make sure the user exists
2732: my $uhome=&homeserver($uname,$udom);
2733: if (($uhome eq '') || ($uhome eq 'no_host')) {
2734: return 'error: no such user';
2735: }
2736: #
2737: # Get student data if we were not given enough information
2738: if (!defined($first) || $first eq '' ||
2739: !defined($last) || $last eq '' ||
2740: !defined($uid) || $uid eq '' ||
2741: !defined($middle) || $middle eq '' ||
2742: !defined($gene) || $gene eq '') {
2743: # They did not supply us with enough data to enroll the student, so
2744: # we need to pick up more information.
2745: my %tmp = &get('environment',
2746: ['firstname','middlename','lastname', 'generation','id']
2747: ,$udom,$uname);
2748:
2749: foreach (keys(%tmp)) {
2750: &logthis("key $_ = ".$tmp{$_});
2751: }
2752: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
2753: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
2754: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
2755: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
2756: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
2757: }
2758: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
2759: $first,$middle);
2760: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2761: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2762: &escape($uname.':'.$udom).'='.
2763: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
2764: $ENV{'course.'.$cid.'.home'});
2765: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2766: return 'error: '.$reply;
2767: }
2768: # Add student role to user
2769: my $uurl='/'.$cid;
2770: $uurl=~s/\_/\//g;
2771: if ($usec) {
2772: $uurl.='/'.$usec;
2773: }
2774: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2775: }
2776:
2777: # ------------------------------------------------- Write to course preferences
2778:
2779: sub writecoursepref {
2780: my ($courseid,%prefs)=@_;
2781: $courseid=~s/^\///;
2782: $courseid=~s/\_/\//g;
2783: my ($cdomain,$cnum)=split(/\//,$courseid);
2784: my $chome=homeserver($cnum,$cdomain);
2785: if (($chome eq '') || ($chome eq 'no_host')) {
2786: return 'error: no such course';
2787: }
2788: my $cstring='';
2789: foreach (keys %prefs) {
2790: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2791: }
2792: $cstring=~s/\&$//;
2793: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2794: }
2795:
2796: # ---------------------------------------------------------- Make/modify course
2797:
2798: sub createcourse {
2799: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
2800: $url=&declutter($url);
2801: my $cid='';
2802: unless (&allowed('ccc',$udom)) {
2803: return 'refused';
2804: }
2805: # ------------------------------------------------------------------- Create ID
2806: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2807: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2808: # ----------------------------------------------- Make sure that does not exist
2809: my $uhome=&homeserver($uname,$udom,'true');
2810: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2811: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2812: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2813: $uhome=&homeserver($uname,$udom,'true');
2814: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2815: return 'error: unable to generate unique course-ID';
2816: }
2817: }
2818: # ------------------------------------------------ Check supplied server name
2819: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
2820: if (! exists($libserv{$course_server})) {
2821: return 'error:bad server name '.$course_server;
2822: }
2823: # ------------------------------------------------------------- Make the course
2824: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2825: $course_server);
2826: unless ($reply eq 'ok') { return 'error: '.$reply; }
2827: $uhome=&homeserver($uname,$udom,'true');
2828: if (($uhome eq '') || ($uhome eq 'no_host')) {
2829: return 'error: no such course';
2830: }
2831: # ----------------------------------------------------------------- Course made
2832: my $topurl=$url;
2833: unless ($nonstandard) {
2834: # ------------------------------------------ For standard courses, make top url
2835: my $mapurl=&clutter($url);
2836: if ($mapurl eq '/res/') { $mapurl=''; }
2837: $ENV{'form.initmap'}=(<<ENDINITMAP);
2838: <map>
2839: <resource id="1" type="start"></resource>
2840: <resource id="2" src="$mapurl"></resource>
2841: <resource id="3" type="finish"></resource>
2842: <link index="1" from="1" to="2"></link>
2843: <link index="2" from="2" to="3"></link>
2844: </map>
2845: ENDINITMAP
2846: $topurl=&declutter(
2847: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
2848: );
2849: }
2850: # ----------------------------------------------------------- Write preferences
2851: &writecoursepref($udom.'_'.$uname,
2852: ('description' => $description,
2853: 'url' => $topurl));
2854: return '/'.$udom.'/'.$uname;
2855: }
2856:
2857: # ---------------------------------------------------------- Assign Custom Role
2858:
2859: sub assigncustomrole {
2860: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2861: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2862: $end,$start);
2863: }
2864:
2865: # ----------------------------------------------------------------- Revoke Role
2866:
2867: sub revokerole {
2868: my ($udom,$uname,$url,$role)=@_;
2869: my $now=time;
2870: return &assignrole($udom,$uname,$url,$role,$now);
2871: }
2872:
2873: # ---------------------------------------------------------- Revoke Custom Role
2874:
2875: sub revokecustomrole {
2876: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2877: my $now=time;
2878: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2879: }
2880:
2881: # ------------------------------------------------------------ Directory lister
2882:
2883: sub dirlist {
2884: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2885:
2886: $uri=~s/^\///;
2887: $uri=~s/\/$//;
2888: my ($udom, $uname);
2889: (undef,$udom,$uname)=split(/\//,$uri);
2890: if(defined($userdomain)) {
2891: $udom = $userdomain;
2892: }
2893: if(defined($username)) {
2894: $uname = $username;
2895: }
2896:
2897: my $dirRoot = $perlvar{'lonDocRoot'};
2898: if(defined($alternateDirectoryRoot)) {
2899: $dirRoot = $alternateDirectoryRoot;
2900: $dirRoot =~ s/\/$//;
2901: }
2902:
2903: if($udom) {
2904: if($uname) {
2905: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2906: homeserver($uname,$udom));
2907: return split(/:/,$listing);
2908: } elsif(!defined($alternateDirectoryRoot)) {
2909: my $tryserver;
2910: my %allusers=();
2911: foreach $tryserver (keys %libserv) {
2912: if($hostdom{$tryserver} eq $udom) {
2913: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2914: $udom, $tryserver);
2915: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2916: && ($listing ne 'con_lost')) {
2917: foreach (split(/:/,$listing)) {
2918: my ($entry,@stat)=split(/&/,$_);
2919: $allusers{$entry}=1;
2920: }
2921: }
2922: }
2923: }
2924: my $alluserstr='';
2925: foreach (sort keys %allusers) {
2926: $alluserstr.=$_.'&user:';
2927: }
2928: $alluserstr=~s/:$//;
2929: return split(/:/,$alluserstr);
2930: } else {
2931: my @emptyResults = ();
2932: push(@emptyResults, 'missing user name');
2933: return split(':',@emptyResults);
2934: }
2935: } elsif(!defined($alternateDirectoryRoot)) {
2936: my $tryserver;
2937: my %alldom=();
2938: foreach $tryserver (keys %libserv) {
2939: $alldom{$hostdom{$tryserver}}=1;
2940: }
2941: my $alldomstr='';
2942: foreach (sort keys %alldom) {
2943: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2944: }
2945: $alldomstr=~s/:$//;
2946: return split(/:/,$alldomstr);
2947: } else {
2948: my @emptyResults = ();
2949: push(@emptyResults, 'missing domain');
2950: return split(':',@emptyResults);
2951: }
2952: }
2953:
2954: # --------------------------------------------- GetFileTimestamp
2955: # This function utilizes dirlist and returns the date stamp for
2956: # when it was last modified. It will also return an error of -1
2957: # if an error occurs
2958:
2959: sub GetFileTimestamp {
2960: my ($studentDomain,$studentName,$filename,$root)=@_;
2961: $studentDomain=~s/\W//g;
2962: $studentName=~s/\W//g;
2963: my $subdir=$studentName.'__';
2964: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
2965: my $proname="$studentDomain/$subdir/$studentName";
2966: $proname .= '/'.$filename;
2967: my @dir = &Apache::lonnet::dirlist($proname, $studentDomain, $studentName,
2968: $root);
2969: my $fileStat = $dir[0];
2970: my @stats = split('&', $fileStat);
2971: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
2972: return $stats[9];
2973: } else {
2974: return -1;
2975: }
2976: }
2977:
2978: # -------------------------------------------------------- Value of a Condition
2979:
2980: sub directcondval {
2981: my $number=shift;
2982: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2983: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2984: } else {
2985: return 2;
2986: }
2987: }
2988:
2989: sub condval {
2990: my $condidx=shift;
2991: my $result=0;
2992: my $allpathcond='';
2993: foreach (split(/\|/,$condidx)) {
2994: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2995: $allpathcond.=
2996: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2997: }
2998: }
2999: $allpathcond=~s/\|$//;
3000: if ($ENV{'request.course.id'}) {
3001: if ($allpathcond) {
3002: my $operand='|';
3003: my @stack;
3004: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
3005: if ($_ eq '(') {
3006: push @stack,($operand,$result)
3007: } elsif ($_ eq ')') {
3008: my $before=pop @stack;
3009: if (pop @stack eq '&') {
3010: $result=$result>$before?$before:$result;
3011: } else {
3012: $result=$result>$before?$result:$before;
3013: }
3014: } elsif (($_ eq '&') || ($_ eq '|')) {
3015: $operand=$_;
3016: } else {
3017: my $new=directcondval($_);
3018: if ($operand eq '&') {
3019: $result=$result>$new?$new:$result;
3020: } else {
3021: $result=$result>$new?$result:$new;
3022: }
3023: }
3024: }
3025: }
3026: }
3027: return $result;
3028: }
3029:
3030: # ---------------------------------------------------- Devalidate courseresdata
3031:
3032: sub devalidatecourseresdata {
3033: my ($coursenum,$coursedomain)=@_;
3034: my $hashid=$coursenum.':'.$coursedomain;
3035: delete $courseresdatacache{$hashid.'.time'};
3036: }
3037:
3038: # --------------------------------------------------- Course Resourcedata Query
3039:
3040: sub courseresdata {
3041: my ($coursenum,$coursedomain,@which)=@_;
3042: my $coursehom=&homeserver($coursenum,$coursedomain);
3043: my $hashid=$coursenum.':'.$coursedomain;
3044: my $dodump=0;
3045: if (!defined($courseresdatacache{$hashid.'.time'})) {
3046: $dodump=1;
3047: } else {
3048: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
3049: }
3050: if ($dodump) {
3051: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
3052: my ($tmp) = keys(%dumpreply);
3053: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
3054: $courseresdatacache{$hashid.'.time'}=time;
3055: $courseresdatacache{$hashid}=\%dumpreply;
3056: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3057: return $tmp;
3058: }
3059: }
3060: foreach my $item (@which) {
3061: if (defined($courseresdatacache{$hashid}->{$item})) {
3062: return $courseresdatacache{$hashid}->{$item};
3063: }
3064: }
3065: return undef;
3066: }
3067:
3068: # --------------------------------------------------------- Value of a Variable
3069:
3070: sub EXT {
3071: my ($varname,$symbparm,$udom,$uname,)=@_;
3072:
3073: unless ($varname) { return ''; }
3074: #get real user name/domain, courseid and symb
3075: my $courseid;
3076: if (!($uname && $udom)) {
3077: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
3078: if (!$symbparm) { $symbparm=$cursymb; }
3079: } else {
3080: $courseid=$ENV{'request.course.id'};
3081: }
3082: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
3083: my $rest;
3084: if (defined($therest[0])) {
3085: $rest=join('.',@therest);
3086: } else {
3087: $rest='';
3088: }
3089:
3090: my $qualifierrest=$qualifier;
3091: if ($rest) { $qualifierrest.='.'.$rest; }
3092: my $spacequalifierrest=$space;
3093: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
3094: if ($realm eq 'user') {
3095: # --------------------------------------------------------------- user.resource
3096: if ($space eq 'resource') {
3097: if (defined($Apache::lonhomework::parsing_a_problem)) {
3098: return $Apache::lonhomework::history{$qualifierrest};
3099: } else {
3100: my %restored=&restore($symbparm,$courseid,$udom,$uname);
3101: return $restored{$qualifierrest};
3102: }
3103: # ----------------------------------------------------------------- user.access
3104: } elsif ($space eq 'access') {
3105: # FIXME - not supporting calls for a specific user
3106: return &allowed($qualifier,$rest);
3107: # ------------------------------------------ user.preferences, user.environment
3108: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
3109: if (($uname eq $ENV{'user.name'}) &&
3110: ($udom eq $ENV{'user.domain'})) {
3111: return $ENV{join('.',('environment',$qualifierrest))};
3112: } else {
3113: my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
3114: return $returnhash{$qualifierrest};
3115: }
3116: # ----------------------------------------------------------------- user.course
3117: } elsif ($space eq 'course') {
3118: # FIXME - not supporting calls for a specific user
3119: return $ENV{join('.',('request.course',$qualifier))};
3120: # ------------------------------------------------------------------- user.role
3121: } elsif ($space eq 'role') {
3122: # FIXME - not supporting calls for a specific user
3123: my ($role,$where)=split(/\./,$ENV{'request.role'});
3124: if ($qualifier eq 'value') {
3125: return $role;
3126: } elsif ($qualifier eq 'extent') {
3127: return $where;
3128: }
3129: # ----------------------------------------------------------------- user.domain
3130: } elsif ($space eq 'domain') {
3131: return $udom;
3132: # ------------------------------------------------------------------- user.name
3133: } elsif ($space eq 'name') {
3134: return $uname;
3135: # ---------------------------------------------------- Any other user namespace
3136: } else {
3137: my %reply=&get($space,[$qualifierrest],$udom,$uname);
3138: return $reply{$qualifierrest};
3139: }
3140: } elsif ($realm eq 'query') {
3141: # ---------------------------------------------- pull stuff out of query string
3142: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
3143: return $ENV{'form.'.$space};
3144: } elsif ($realm eq 'request') {
3145: # ------------------------------------------------------------- request.browser
3146: if ($space eq 'browser') {
3147: return $ENV{'browser.'.$qualifier};
3148: # ------------------------------------------------------------ request.filename
3149: } else {
3150: return $ENV{'request.'.$spacequalifierrest};
3151: }
3152: } elsif ($realm eq 'course') {
3153: # ---------------------------------------------------------- course.description
3154: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
3155: } elsif ($realm eq 'resource') {
3156:
3157: if ($courseid eq $ENV{'request.course.id'}) {
3158:
3159: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
3160:
3161: # ----------------------------------------------------- Cascading lookup scheme
3162: if (!$symbparm) { $symbparm=&symbread(); }
3163: my $symbp=$symbparm;
3164: my $mapp=(split(/\_\_\_/,$symbp))[0];
3165:
3166: my $symbparm=$symbp.'.'.$spacequalifierrest;
3167: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3168:
3169: my $section;
3170: if (($ENV{'user.name'} eq $uname) &&
3171: ($ENV{'user.domain'} eq $udom)) {
3172: $section=$ENV{'request.course.sec'};
3173: } else {
3174: $section=&usection($udom,$uname,$courseid);
3175: }
3176:
3177: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3178: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3179: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3180:
3181: my $courselevel=$courseid.'.'.$spacequalifierrest;
3182: my $courselevelr=$courseid.'.'.$symbparm;
3183: my $courselevelm=$courseid.'.'.$mapparm;
3184:
3185: # ----------------------------------------------------------- first, check user
3186: #most student don't have any data set, check if there is some data
3187: #every thirty minutes
3188: if (!
3189: (exists($ENV{'cache.studentresdata'})
3190: && (($ENV{'cache.studentresdata'}+1800) > time))) {
3191: my %resourcedata=&get('resourcedata',
3192: [$courselevelr,$courselevelm,$courselevel],
3193: $udom,$uname);
3194: my ($tmp)=keys(%resourcedata);
3195: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
3196: if ($resourcedata{$courselevelr}) {
3197: return $resourcedata{$courselevelr}; }
3198: if ($resourcedata{$courselevelm}) {
3199: return $resourcedata{$courselevelm}; }
3200: if ($resourcedata{$courselevel}) {
3201: return $resourcedata{$courselevel}; }
3202: } else {
3203: if ($tmp!~/No such file/) {
3204: &logthis("<font color=blue>WARNING:".
3205: " Trying to get resource data for ".
3206: $uname." at ".$udom.": ".
3207: $tmp."</font>");
3208: } elsif ($tmp=~/error:No such file/) {
3209: $ENV{'cache.studentresdata'}=time;
3210: &appenv(('cache.studentresdata'=>
3211: $ENV{'cache.studentresdata'}));
3212: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3213: return $tmp;
3214: }
3215: }
3216: }
3217:
3218: # -------------------------------------------------------- second, check course
3219:
3220: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3221: $ENV{'course.'.$courseid.'.domain'},
3222: ($seclevelr,$seclevelm,$seclevel,
3223: $courselevelr,$courselevelm,
3224: $courselevel));
3225: if (defined($coursereply)) { return $coursereply; }
3226:
3227: # ------------------------------------------------------ third, check map parms
3228: my %parmhash=();
3229: my $thisparm='';
3230: if (tie(%parmhash,'GDBM_File',
3231: $ENV{'request.course.fn'}.'_parms.db',
3232: &GDBM_READER(),0640)) {
3233: $thisparm=$parmhash{$symbparm};
3234: untie(%parmhash);
3235: }
3236: if ($thisparm) { return $thisparm; }
3237: }
3238: # --------------------------------------------- last, look in resource metadata
3239:
3240: $spacequalifierrest=~s/\./\_/;
3241: my $filename;
3242: if (!$symbparm) { $symbparm=&symbread(); }
3243: if ($symbparm) {
3244: $filename=(split(/\_\_\_/,$symbparm))[2];
3245: } else {
3246: $filename=$ENV{'request.filename'};
3247: }
3248: my $metadata=&metadata($filename,$spacequalifierrest);
3249: if (defined($metadata)) { return $metadata; }
3250: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
3251: if (defined($metadata)) { return $metadata; }
3252:
3253: # ------------------------------------------------------------------ Cascade up
3254: unless ($space eq '0') {
3255: my @parts=split(/_/,$space);
3256: my $id=pop(@parts);
3257: my $part=join('_',@parts);
3258: if ($part eq '') { $part='0'; }
3259: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
3260: $symbparm,$udom,$uname);
3261: if (defined($partgeneral)) { return $partgeneral; }
3262: }
3263:
3264: # ---------------------------------------------------- Any other user namespace
3265: } elsif ($realm eq 'environment') {
3266: # ----------------------------------------------------------------- environment
3267: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3268: return $ENV{'environment.'.$spacequalifierrest};
3269: } else {
3270: my %returnhash=&userenvironment($udom,$uname,
3271: $spacequalifierrest);
3272: return $returnhash{$spacequalifierrest};
3273: }
3274: } elsif ($realm eq 'system') {
3275: # ----------------------------------------------------------------- system.time
3276: if ($space eq 'time') {
3277: return time;
3278: }
3279: }
3280: return '';
3281: }
3282:
3283: sub add_prefix_and_part {
3284: my ($prefix,$part)=@_;
3285: my $keyroot;
3286: if (defined($prefix) && $prefix !~ /^__/) {
3287: # prefix that has a part already
3288: $keyroot=$prefix;
3289: } elsif (defined($prefix)) {
3290: # prefix that is missing a part
3291: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3292: } else {
3293: # no prefix at all
3294: if (defined($part)) { $keyroot='_'.$part; }
3295: }
3296: return $keyroot;
3297: }
3298:
3299: # ---------------------------------------------------------------- Get metadata
3300:
3301: sub metadata {
3302: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3303:
3304: $uri=&declutter($uri);
3305: # if it is a non metadata possible uri return quickly
3306: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3307: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|)) {
3308: return '';
3309: }
3310: my $filename=$uri;
3311: $uri=~s/\.meta$//;
3312: #
3313: # Is the metadata already cached?
3314: # Look at timestamp of caching
3315: # Everything is cached by the main uri, libraries are never directly cached
3316: #
3317: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
3318: #
3319: # Is this a recursive call for a library?
3320: #
3321: if ($liburi) {
3322: $liburi=&declutter($liburi);
3323: $filename=$liburi;
3324: }
3325: my %metathesekeys=();
3326: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3327: my $metastring=&getfile(&filelocation('',&clutter($filename)));
3328: my $parser=HTML::LCParser->new(\$metastring);
3329: my $token;
3330: undef %metathesekeys;
3331: while ($token=$parser->get_token) {
3332: if ($token->[0] eq 'S') {
3333: if (defined($token->[2]->{'package'})) {
3334: #
3335: # This is a package - get package info
3336: #
3337: my $package=$token->[2]->{'package'};
3338: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3339: if (defined($token->[2]->{'id'})) {
3340: $keyroot.='_'.$token->[2]->{'id'};
3341: }
3342: if ($metacache{$uri.':packages'}) {
3343: $metacache{$uri.':packages'}.=','.$package.$keyroot;
3344: } else {
3345: $metacache{$uri.':packages'}=$package.$keyroot;
3346: }
3347: foreach (keys %packagetab) {
3348: if ($_=~/^$package\&/) {
3349: my ($pack,$name,$subp)=split(/\&/,$_);
3350: my $value=$packagetab{$_};
3351: my $part=$keyroot;
3352: $part=~s/^\_//;
3353: if ($subp eq 'display') {
3354: $value.=' [Part: '.$part.']';
3355: }
3356: my $unikey='parameter'.$keyroot.'_'.$name;
3357: if ($subp eq 'default') { $unikey='parameter_0_'.$name; }
3358: $metathesekeys{$unikey}=1;
3359: $metacache{$uri.':'.$unikey.'.part'}=$part;
3360: unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
3361: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
3362: }
3363: if (defined($metacache{$uri.':'.$unikey.'.default'})) {
3364: $metacache{$uri.':'.$unikey}=
3365: $metacache{$uri.':'.$unikey.'.default'}
3366: }
3367: }
3368: }
3369: } else {
3370: #
3371: # This is not a package - some other kind of start tag
3372: #
3373: my $entry=$token->[1];
3374: my $unikey;
3375: if ($entry eq 'import') {
3376: $unikey='';
3377: } else {
3378: $unikey=$entry;
3379: }
3380: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3381:
3382: if (defined($token->[2]->{'id'})) {
3383: $unikey.='_'.$token->[2]->{'id'};
3384: }
3385:
3386: if ($entry eq 'import') {
3387: #
3388: # Importing a library here
3389: #
3390: if ($depthcount<20) {
3391: my $location=$parser->get_text('/import');
3392: my $dir=$filename;
3393: $dir=~s|[^/]*$||;
3394: $location=&filelocation($dir,$location);
3395: foreach (sort(split(/\,/,&metadata($uri,'keys',
3396: $location,$unikey,
3397: $depthcount+1)))) {
3398: $metathesekeys{$_}=1;
3399: }
3400: }
3401: } else {
3402:
3403: if (defined($token->[2]->{'name'})) {
3404: $unikey.='_'.$token->[2]->{'name'};
3405: }
3406: $metathesekeys{$unikey}=1;
3407: foreach (@{$token->[3]}) {
3408: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
3409: }
3410: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
3411: my $default=$metacache{$uri.':'.$unikey.'.default'};
3412: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
3413: # only ws inside the tag, and not in default, so use default
3414: # as value
3415: $metacache{$uri.':'.$unikey}=$default;
3416: } else {
3417: # either something interesting inside the tag or default
3418: # uninteresting
3419: $metacache{$uri.':'.$unikey}=$internaltext;
3420: }
3421: # end of not-a-package not-a-library import
3422: }
3423: # end of not-a-package start tag
3424: }
3425: # the next is the end of "start tag"
3426: }
3427: }
3428: # are there custom rights to evaluate
3429: if ($metacache{$uri.':copyright'} eq 'custom') {
3430:
3431: #
3432: # Importing a rights file here
3433: #
3434: unless ($depthcount) {
3435: my $location=$metacache{$uri.':customdistributionfile'};
3436: my $dir=$filename;
3437: $dir=~s|[^/]*$||;
3438: $location=&filelocation($dir,$location);
3439: foreach (sort(split(/\,/,&metadata($uri,'keys',
3440: $location,'_rights',
3441: $depthcount+1)))) {
3442: $metathesekeys{$_}=1;
3443: }
3444: }
3445: }
3446: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
3447: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
3448: $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
3449: $metacache{$uri.':cachedtimestamp'}=time;
3450: # this is the end of "was not already recently cached
3451: }
3452: return $metacache{$uri.':'.$what};
3453: }
3454:
3455: sub metadata_generate_part0 {
3456: my ($metadata,$metacache,$uri) = @_;
3457: my %allnames;
3458: foreach my $metakey (sort keys %$metadata) {
3459: if ($metakey=~/^parameter\_(.*)/) {
3460: my $part=$$metacache{$uri.':'.$metakey.'.part'};
3461: my $name=$$metacache{$uri.':'.$metakey.'.name'};
3462: if (! exists($$metadata{'parameter_0_'.$name})) {
3463: $allnames{$name}=$part;
3464: }
3465: }
3466: }
3467: foreach my $name (keys(%allnames)) {
3468: $$metadata{"parameter_0_$name"}=1;
3469: my $key="$uri:parameter_0_$name";
3470: $$metacache{"$key.part"}='0';
3471: $$metacache{"$key.name"}=$name;
3472: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
3473: $allnames{$name}.'_'.$name.
3474: '.type'};
3475: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
3476: '.display'};
3477: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3478: $olddis=~s/$expr/\[Part: 0\]/;
3479: $$metacache{"$key.display"}=$olddis;
3480: }
3481: }
3482:
3483: # ------------------------------------------------- Get the title of a resource
3484:
3485: sub gettitle {
3486: my $urlsymb=shift;
3487: my $symb=&symbread($urlsymb);
3488: unless ($symb) {
3489: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3490: return &metadata($urlsymb,'title');
3491: }
3492: if ($titlecache{$symb}) { return $titlecache{$symb}; }
3493: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3494: my $title='';
3495: my %bighash;
3496: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3497: &GDBM_READER(),0640)) {
3498: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3499: $title=$bighash{'title_'.$mapid.'.'.$resid};
3500: untie %bighash;
3501: }
3502: if ($title) {
3503: $titlecache{$symb}=$title;
3504: return $title;
3505: } else {
3506: return &metadata($urlsymb,'title');
3507: }
3508: }
3509:
3510: # ------------------------------------------------- Update symbolic store links
3511:
3512: sub symblist {
3513: my ($mapname,%newhash)=@_;
3514: $mapname=declutter($mapname);
3515: my %hash;
3516: if (($ENV{'request.course.fn'}) && (%newhash)) {
3517: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3518: &GDBM_WRCREAT(),0640)) {
3519: foreach (keys %newhash) {
3520: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
3521: }
3522: if (untie(%hash)) {
3523: return 'ok';
3524: }
3525: }
3526: }
3527: return 'error';
3528: }
3529:
3530: # --------------------------------------------------------------- Verify a symb
3531:
3532: sub symbverify {
3533: my ($symb,$thisfn)=@_;
3534: $thisfn=&declutter($thisfn);
3535: # direct jump to resource in page or to a sequence - will construct own symbs
3536: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
3537: # check URL part
3538: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3539: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
3540:
3541: $symb=&symbclean($symb);
3542:
3543: my %bighash;
3544: my $okay=0;
3545: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3546: &GDBM_READER(),0640)) {
3547: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3548: unless ($ids) {
3549: $ids=$bighash{'ids_/'.$thisfn};
3550: }
3551: if ($ids) {
3552: # ------------------------------------------------------------------- Has ID(s)
3553: foreach (split(/\,/,$ids)) {
3554: my ($mapid,$resid)=split(/\./,$_);
3555: if (
3556: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
3557: eq $symb) {
3558: $okay=1;
3559: }
3560: }
3561: }
3562: untie(%bighash);
3563: }
3564: return $okay;
3565: }
3566:
3567: # --------------------------------------------------------------- Clean-up symb
3568:
3569: sub symbclean {
3570: my $symb=shift;
3571:
3572: # remove version from map
3573: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
3574:
3575: # remove version from URL
3576: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
3577:
3578: return $symb;
3579: }
3580:
3581: # ------------------------------------------------------ Return symb list entry
3582:
3583: sub symbread {
3584: my ($thisfn,$donotrecurse)=@_;
3585: # no filename provided? try from environment
3586: unless ($thisfn) {
3587: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
3588: $thisfn=$ENV{'request.filename'};
3589: }
3590: # is that filename actually a symb? Verify, clean, and return
3591: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
3592: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
3593: }
3594: $thisfn=declutter($thisfn);
3595: my %hash;
3596: my %bighash;
3597: my $syval='';
3598: if (($ENV{'request.course.fn'}) && ($thisfn)) {
3599: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3600: &GDBM_READER(),0640)) {
3601: $syval=$hash{$thisfn};
3602: untie(%hash);
3603: }
3604: # ---------------------------------------------------------- There was an entry
3605: if ($syval) {
3606: unless ($syval=~/\_\d+$/) {
3607: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
3608: &appenv('request.ambiguous' => $thisfn);
3609: return '';
3610: }
3611: $syval.=$1;
3612: }
3613: } else {
3614: # ------------------------------------------------------- Was not in symb table
3615: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3616: &GDBM_READER(),0640)) {
3617: # ---------------------------------------------- Get ID(s) for current resource
3618: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3619: unless ($ids) {
3620: $ids=$bighash{'ids_/'.$thisfn};
3621: }
3622: unless ($ids) {
3623: # alias?
3624: $ids=$bighash{'mapalias_'.$thisfn};
3625: }
3626: if ($ids) {
3627: # ------------------------------------------------------------------- Has ID(s)
3628: my @possibilities=split(/\,/,$ids);
3629: if ($#possibilities==0) {
3630: # ----------------------------------------------- There is only one possibility
3631: my ($mapid,$resid)=split(/\./,$ids);
3632: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
3633: } elsif (!$donotrecurse) {
3634: # ------------------------------------------ There is more than one possibility
3635: my $realpossible=0;
3636: foreach (@possibilities) {
3637: my $file=$bighash{'src_'.$_};
3638: if (&allowed('bre',$file)) {
3639: my ($mapid,$resid)=split(/\./,$_);
3640: if ($bighash{'map_type_'.$mapid} ne 'page') {
3641: $realpossible++;
3642: $syval=declutter($bighash{'map_id_'.$mapid}).
3643: '___'.$resid;
3644: }
3645: }
3646: }
3647: if ($realpossible!=1) { $syval=''; }
3648: } else {
3649: $syval='';
3650: }
3651: }
3652: untie(%bighash)
3653: }
3654: }
3655: if ($syval) {
3656: return &symbclean($syval.'___'.$thisfn);
3657: }
3658: }
3659: &appenv('request.ambiguous' => $thisfn);
3660: return '';
3661: }
3662:
3663: # ---------------------------------------------------------- Return random seed
3664:
3665: sub numval {
3666: my $txt=shift;
3667: $txt=~tr/A-J/0-9/;
3668: $txt=~tr/a-j/0-9/;
3669: $txt=~tr/K-T/0-9/;
3670: $txt=~tr/k-t/0-9/;
3671: $txt=~tr/U-Z/0-5/;
3672: $txt=~tr/u-z/0-5/;
3673: $txt=~s/\D//g;
3674: return int($txt);
3675: }
3676:
3677: sub rndseed {
3678: my ($symb,$courseid,$domain,$username)=@_;
3679: if (!$symb) {
3680: unless ($symb=&symbread()) { return time; }
3681: }
3682: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
3683: if (!$domain) {$domain=$ENV{'user.domain'};}
3684: if (!$username) {$username=$ENV{'user.name'};}
3685: {
3686: use integer;
3687: my $symbchck=unpack("%32C*",$symb) << 27;
3688: my $symbseed=numval($symb) << 22;
3689: my $namechck=unpack("%32C*",$username) << 17;
3690: my $nameseed=numval($username) << 12;
3691: my $domainseed=unpack("%32C*",$domain) << 7;
3692: my $courseseed=unpack("%32C*",$courseid);
3693: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
3694: #uncommenting these lines can break things!
3695: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
3696: #&Apache::lonxml::debug("rndseed :$num:$symb");
3697: return $num;
3698: }
3699: }
3700:
3701: sub ireceipt {
3702: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
3703: my $cuname=unpack("%32C*",$funame);
3704: my $cudom=unpack("%32C*",$fudom);
3705: my $cucourseid=unpack("%32C*",$fucourseid);
3706: my $cusymb=unpack("%32C*",$fusymb);
3707: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
3708: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
3709: ($cunique%$cuname+
3710: $cunique%$cudom+
3711: $cusymb%$cuname+
3712: $cusymb%$cudom+
3713: $cucourseid%$cuname+
3714: $cucourseid%$cudom);
3715: }
3716:
3717: sub receipt {
3718: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
3719: return &ireceipt($name,$domain,$courseid,$symb);
3720: }
3721:
3722: # ------------------------------------------------------------ Serves up a file
3723: # returns either the contents of the file or a -1
3724: sub getfile {
3725: my $file=shift;
3726: if ($file=~/^\/*uploaded\//) { # user file
3727: my $ua=new LWP::UserAgent;
3728: my $request=new HTTP::Request('GET',&tokenwrapper($file));
3729: my $response=$ua->request($request);
3730: if ($response->is_success()) {
3731: return $response->content;
3732: } else {
3733: return -1;
3734: }
3735: } else { # normal file from res space
3736: &repcopy($file);
3737: if (! -e $file ) { return -1; };
3738: my $fh=Apache::File->new($file);
3739: my $a='';
3740: while (<$fh>) { $a .=$_; }
3741: return $a;
3742: }
3743: }
3744:
3745: sub filelocation {
3746: my ($dir,$file) = @_;
3747: my $location;
3748: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
3749: if ($file=~m:^/~:) { # is a contruction space reference
3750: $location = $file;
3751: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
3752: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
3753: $location=$file;
3754: } else {
3755: $file=~s/^$perlvar{'lonDocRoot'}//;
3756: $file=~s:^/*res::;
3757: if ( !( $file =~ m:^/:) ) {
3758: $location = $dir. '/'.$file;
3759: } else {
3760: $location = '/home/httpd/html/res'.$file;
3761: }
3762: }
3763: $location=~s://+:/:g; # remove duplicate /
3764: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
3765: return $location;
3766: }
3767:
3768: sub hreflocation {
3769: my ($dir,$file)=@_;
3770: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
3771: my $finalpath=filelocation($dir,$file);
3772: $finalpath=~s/^\/home\/httpd\/html//;
3773: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
3774: return $finalpath;
3775: } else {
3776: return $file;
3777: }
3778: }
3779:
3780: # ------------------------------------------------------------- Declutters URLs
3781:
3782: sub declutter {
3783: my $thisfn=shift;
3784: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
3785: $thisfn=~s/^\///;
3786: $thisfn=~s/^res\///;
3787: $thisfn=~s/\?.+$//;
3788: return $thisfn;
3789: }
3790:
3791: # ------------------------------------------------------------- Clutter up URLs
3792:
3793: sub clutter {
3794: my $thisfn='/'.&declutter(shift);
3795: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
3796: $thisfn='/res'.$thisfn;
3797: }
3798: return $thisfn;
3799: }
3800:
3801: # -------------------------------------------------------- Escape Special Chars
3802:
3803: sub escape {
3804: my $str=shift;
3805: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3806: return $str;
3807: }
3808:
3809: # ----------------------------------------------------- Un-Escape Special Chars
3810:
3811: sub unescape {
3812: my $str=shift;
3813: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3814: return $str;
3815: }
3816:
3817: # ================================================================ Main Program
3818:
3819: sub goodbye {
3820: &logthis("Starting Shut down");
3821: &flushcourselogs();
3822: &logthis("Shutting down");
3823: }
3824:
3825: BEGIN {
3826: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
3827: unless ($readit) {
3828: {
3829: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
3830:
3831: while (my $configline=<$config>) {
3832: if ($configline =~ /^[^\#]*PerlSetVar/) {
3833: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3834: chomp($varvalue);
3835: $perlvar{$varname}=$varvalue;
3836: }
3837: }
3838: }
3839: {
3840: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
3841:
3842: while (my $configline=<$config>) {
3843: if ($configline =~ /^[^\#]*PerlSetVar/) {
3844: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3845: chomp($varvalue);
3846: $perlvar{$varname}=$varvalue;
3847: }
3848: }
3849: }
3850:
3851: # ------------------------------------------------------------ Read domain file
3852: {
3853: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
3854: '/domain.tab');
3855: %domaindescription = ();
3856: %domain_auth_def = ();
3857: %domain_auth_arg_def = ();
3858: if ($fh) {
3859: while (<$fh>) {
3860: next if /^\#/;
3861: chomp;
3862: my ($domain, $domain_description, $def_auth, $def_auth_arg)
3863: = split(/:/,$_,4);
3864: $domain_auth_def{$domain}=$def_auth;
3865: $domain_auth_arg_def{$domain}=$def_auth_arg;
3866: $domaindescription{$domain}=$domain_description;
3867: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
3868: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
3869: }
3870: }
3871: }
3872:
3873:
3874: # ------------------------------------------------------------- Read hosts file
3875: {
3876: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
3877:
3878: while (my $configline=<$config>) {
3879: next if ($configline =~ /^(\#|\s*$)/);
3880: chomp($configline);
3881: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
3882: if ($id && $domain && $role && $name && $ip) {
3883: $hostname{$id}=$name;
3884: $hostdom{$id}=$domain;
3885: $hostip{$id}=$ip;
3886: $iphost{$ip}=$id;
3887: if ($role eq 'library') { $libserv{$id}=$name; }
3888: } else {
3889: if ($configline) {
3890: &logthis("Skipping hosts.tab line -$configline-");
3891: }
3892: }
3893: }
3894: }
3895:
3896: # ------------------------------------------------------ Read spare server file
3897: {
3898: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3899:
3900: while (my $configline=<$config>) {
3901: chomp($configline);
3902: if ($configline) {
3903: $spareid{$configline}=1;
3904: }
3905: }
3906: }
3907: # ------------------------------------------------------------ Read permissions
3908: {
3909: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3910:
3911: while (my $configline=<$config>) {
3912: chomp($configline);
3913: if ($configline) {
3914: my ($role,$perm)=split(/ /,$configline);
3915: if ($perm ne '') { $pr{$role}=$perm; }
3916: }
3917: }
3918: }
3919:
3920: # -------------------------------------------- Read plain texts for permissions
3921: {
3922: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3923:
3924: while (my $configline=<$config>) {
3925: chomp($configline);
3926: if ($configline) {
3927: my ($short,$plain)=split(/:/,$configline);
3928: if ($plain ne '') { $prp{$short}=$plain; }
3929: }
3930: }
3931: }
3932:
3933: # ---------------------------------------------------------- Read package table
3934: {
3935: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3936:
3937: while (my $configline=<$config>) {
3938: chomp($configline);
3939: my ($short,$plain)=split(/:/,$configline);
3940: my ($pack,$name)=split(/\&/,$short);
3941: if ($plain ne '') {
3942: $packagetab{$pack.'&'.$name.'&name'}=$name;
3943: $packagetab{$short}=$plain;
3944: }
3945: }
3946: }
3947:
3948: # ------------- set up temporary directory
3949: {
3950: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
3951:
3952: }
3953:
3954: %metacache=();
3955:
3956: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
3957: $dumpcount=0;
3958:
3959: &logtouch();
3960: &logthis('<font color=yellow>INFO: Read configuration</font>');
3961: $readit=1;
3962: }
3963: }
3964:
3965: 1;
3966: __END__
3967:
3968: =pod
3969:
3970: =head1 NAME
3971:
3972: Apache::lonnet - Subroutines to ask questions about things in the network.
3973:
3974: =head1 SYNOPSIS
3975:
3976: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
3977:
3978: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
3979:
3980: Common parameters:
3981:
3982: =over 4
3983:
3984: =item *
3985:
3986: $uname : an internal username (if $cname expecting a course Id specifically)
3987:
3988: =item *
3989:
3990: $udom : a domain (if $cdom expecting a course's domain specifically)
3991:
3992: =item *
3993:
3994: $symb : a resource instance identifier
3995:
3996: =item *
3997:
3998: $namespace : the name of a .db file that contains the data needed or
3999: being set.
4000:
4001: =back
4002:
4003: =head1 INTRODUCTION
4004:
4005: This module provides subroutines which interact with the
4006: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
4007: - classes
4008: - users
4009: - resources
4010:
4011: For many of these objects you can also use this to store data about
4012: them or modify them in various ways.
4013:
4014: This is part of the LearningOnline Network with CAPA project
4015: described at http://www.lon-capa.org.
4016:
4017: =head1 RETURN MESSAGES
4018:
4019: =over 4
4020:
4021: =item *
4022:
4023: con_lost : unable to contact remote host
4024:
4025: =item *
4026:
4027: con_delayed : unable to contact remote host, message will be delivered
4028: when the connection is brought back up
4029:
4030: =item *
4031:
4032: con_failed : unable to contact remote host and unable to save message
4033: for later delivery
4034:
4035: =item *
4036:
4037: error: : an error a occured, a description of the error follows the :
4038:
4039: =item *
4040:
4041: no_such_host : unable to fund a host associated with the user/domain
4042: that was requested
4043:
4044: =back
4045:
4046: =head1 PUBLIC SUBROUTINES
4047:
4048: =head2 Session Environment Functions
4049:
4050: =over 4
4051:
4052: =item *
4053:
4054: appenv(%hash) : the value of %hash is written to the user envirnoment
4055: file, and will be restored for each access this user makes during this
4056: session, also modifies the %ENV for the current process
4057:
4058: =item *
4059:
4060: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
4061:
4062: =back
4063:
4064: =head2 User Information
4065:
4066: =over 4
4067:
4068: =item *
4069:
4070: queryauthenticate($uname,$udom) : try to determine user's current
4071: authentication scheme
4072:
4073: =item *
4074:
4075: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
4076: servers (first use the current one), $upass should be the users password
4077:
4078: =item *
4079:
4080: homeserver($uname,$udom) : find the server which has the user's
4081: directory and files (there must be only one), this caches the answer,
4082: and also caches if there is a borken connection.
4083:
4084: =item *
4085:
4086: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
4087: unique resource in a domain, there must be only 1 ID per username, and
4088: only 1 username per ID in a specific domain) (returns hash:
4089: id=>name,id=>name)
4090:
4091: =item *
4092:
4093: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
4094: name=>id,name=>id)
4095:
4096: =item *
4097:
4098: idput($udom,%ids) : store away a list of names and associated IDs
4099:
4100: =item *
4101:
4102: rolesinit($udom,$username,$authhost) : get user privileges
4103:
4104: =item *
4105:
4106: usection($udom,$uname,$cname) : finds the section of student in the
4107: course $cname, return section name/number or '' for "not in course"
4108: and '-1' for "no section"
4109:
4110: =item *
4111:
4112: userenvironment($udom,$uname,@what) : gets the values of the keys
4113: passed in @what from the requested user's environment, returns a hash
4114:
4115: =back
4116:
4117: =head2 User Roles
4118:
4119: =over 4
4120:
4121: =item *
4122:
4123: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
4124: actions
4125: F: full access
4126: U,I,K: authentication modes (cxx only)
4127: '': forbidden
4128: 1: user needs to choose course
4129: 2: browse allowed
4130:
4131: =item *
4132:
4133: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
4134: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
4135: and course level
4136:
4137: =item *
4138:
4139: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
4140: explanation of a user role term
4141:
4142: =back
4143:
4144: =head2 User Modification
4145:
4146: =over 4
4147:
4148: =item *
4149:
4150: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
4151: user for the level given by URL. Optional start and end dates (leave empty
4152: string or zero for "no date")
4153:
4154: =item *
4155:
4156: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
4157: change a users, password, possible return values are: ok,
4158: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
4159: refused
4160:
4161: =item *
4162:
4163: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
4164:
4165: =item *
4166:
4167: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
4168: modify user
4169:
4170: =item *
4171:
4172: modifystudent
4173:
4174: modify a students enrollment and identification information.
4175: The course id is resolved based on the current users environment.
4176: This means the envoking user must be a course coordinator or otherwise
4177: associated with a course.
4178:
4179: This call is essentially a wrapper for lonnet::modifyuser and
4180: lonnet::modify_student_enrollment
4181:
4182: Inputs:
4183:
4184: =over 4
4185:
4186: =item B<$udom> Students loncapa domain
4187:
4188: =item B<$uname> Students loncapa login name
4189:
4190: =item B<$uid> Students id/student number
4191:
4192: =item B<$umode> Students authentication mode
4193:
4194: =item B<$upass> Students password
4195:
4196: =item B<$first> Students first name
4197:
4198: =item B<$middle> Students middle name
4199:
4200: =item B<$last> Students last name
4201:
4202: =item B<$gene> Students generation
4203:
4204: =item B<$usec> Students section in course
4205:
4206: =item B<$end> Unix time of the roles expiration
4207:
4208: =item B<$start> Unix time of the roles start date
4209:
4210: =item B<$forceid> If defined, allow $uid to be changed
4211:
4212: =item B<$desiredhome> server to use as home server for student
4213:
4214: =back
4215:
4216: =item *
4217:
4218: modify_student_enrollment
4219:
4220: Change a students enrollment status in a class. The environment variable
4221: 'role.request.course' must be defined for this function to proceed.
4222:
4223: Inputs:
4224:
4225: =over 4
4226:
4227: =item $udom, students domain
4228:
4229: =item $uname, students name
4230:
4231: =item $uid, students user id
4232:
4233: =item $first, students first name
4234:
4235: =item $middle
4236:
4237: =item $last
4238:
4239: =item $gene
4240:
4241: =item $usec
4242:
4243: =item $end
4244:
4245: =item $start
4246:
4247: =back
4248:
4249:
4250: =item *
4251:
4252: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
4253: custom role; give a custom role to a user for the level given by URL. Specify
4254: name and domain of role author, and role name
4255:
4256: =item *
4257:
4258: revokerole($udom,$uname,$url,$role) : revoke a role for url
4259:
4260: =item *
4261:
4262: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
4263:
4264: =back
4265:
4266: =head2 Course Infomation
4267:
4268: =over 4
4269:
4270: =item *
4271:
4272: coursedescription($courseid) : course description
4273:
4274: =item *
4275:
4276: courseresdata($coursenum,$coursedomain,@which) : request for current
4277: parameter setting for a specific course, @what should be a list of
4278: parameters to ask about. This routine caches answers for 5 minutes.
4279:
4280: =back
4281:
4282: =head2 Course Modification
4283:
4284: =over 4
4285:
4286: =item *
4287:
4288: writecoursepref($courseid,%prefs) : write preferences (environment
4289: database) for a course
4290:
4291: =item *
4292:
4293: createcourse($udom,$description,$url) : make/modify course
4294:
4295: =back
4296:
4297: =head2 Resource Subroutines
4298:
4299: =over 4
4300:
4301: =item *
4302:
4303: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
4304:
4305: =item *
4306:
4307: repcopy($filename) : subscribes to the requested file, and attempts to
4308: replicate from the owning library server, Might return
4309: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
4310: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
4311: resource. Expects the local filesystem pathname
4312: (/home/httpd/html/res/....)
4313:
4314: =back
4315:
4316: =head2 Resource Information
4317:
4318: =over 4
4319:
4320: =item *
4321:
4322: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
4323: a vairety of different possible values, $varname should be a request
4324: string, and the other parameters can be used to specify who and what
4325: one is asking about.
4326:
4327: Possible values for $varname are environment.lastname (or other item
4328: from the envirnment hash), user.name (or someother aspect about the
4329: user), resource.0.maxtries (or some other part and parameter of a
4330: resource)
4331:
4332: =item *
4333:
4334: directcondval($number) : get current value of a condition; reads from a state
4335: string
4336:
4337: =item *
4338:
4339: condval($condidx) : value of condition index based on state
4340:
4341: =item *
4342:
4343: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
4344: resource's metadata, $what should be either a specific key, or either
4345: 'keys' (to get a list of possible keys) or 'packages' to get a list of
4346: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
4347:
4348: this function automatically caches all requests
4349:
4350: =item *
4351:
4352: metadata_query($query,$custom,$customshow) : make a metadata query against the
4353: network of library servers; returns file handle of where SQL and regex results
4354: will be stored for query
4355:
4356: =item *
4357:
4358: symbread($filename) : return symbolic list entry (filename argument optional);
4359: returns the data handle
4360:
4361: =item *
4362:
4363: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
4364: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
4365: failure, user must be in a course, as it assumes the existance of the
4366: course initi hash, and uses $ENV('request.course.id'}
4367:
4368:
4369: =item *
4370:
4371: symbclean($symb) : removes versions numbers from a symb, returns the
4372: cleaned symb
4373:
4374: =item *
4375:
4376: is_on_map($uri) : checks if the $uri is somewhere on the current
4377: course map, user must be in a course for it to work.
4378:
4379: =item *
4380:
4381: numval($salt) : return random seed value (addend for rndseed)
4382:
4383: =item *
4384:
4385: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
4386: a random seed, all arguments are optional, if they aren't sent it uses the
4387: environment to derive them. Note: if symb isn't sent and it can't get one
4388: from &symbread it will use the current time as its return value
4389:
4390: =item *
4391:
4392: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
4393: unfakeable, receipt
4394:
4395: =item *
4396:
4397: receipt() : API to ireceipt working off of ENV values; given out to users
4398:
4399: =item *
4400:
4401: countacc($url) : count the number of accesses to a given URL
4402:
4403: =item *
4404:
4405: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
4406:
4407: =item *
4408:
4409: checkin($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 $tcrsid)
4410:
4411: =item *
4412:
4413: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
4414:
4415: =item *
4416:
4417: devalidate($symb) : devalidate temporary spreadsheet calculations,
4418: forcing spreadsheet to reevaluate the resource scores next time.
4419:
4420: =back
4421:
4422: =head2 Storing/Retreiving Data
4423:
4424: =over 4
4425:
4426: =item *
4427:
4428: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
4429: for this url; hashref needs to be given and should be a \%hashname; the
4430: remaining args aren't required and if they aren't passed or are '' they will
4431: be derived from the ENV
4432:
4433: =item *
4434:
4435: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
4436: uses critical subroutine
4437:
4438: =item *
4439:
4440: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
4441: all args are optional
4442:
4443: =item *
4444:
4445: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
4446: works very similar to store/cstore, but all data is stored in a
4447: temporary location and can be reset using tmpreset, $storehash should
4448: be a hash reference, returns nothing on success
4449:
4450: =item *
4451:
4452: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
4453: similar to restore, but all data is stored in a temporary location and
4454: can be reset using tmpreset. Returns a hash of values on success,
4455: error string otherwise.
4456:
4457: =item *
4458:
4459: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
4460: deltes all keys for $symb form the temporary storage hash.
4461:
4462: =item *
4463:
4464: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4465: reference filled in from namesp ($udom and $uname are optional)
4466:
4467: =item *
4468:
4469: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
4470: namesp ($udom and $uname are optional)
4471:
4472: =item *
4473:
4474: dump($namespace,$udom,$uname,$regexp) :
4475: dumps the complete (or key matching regexp) namespace into a hash
4476: ($udom, $uname and $regexp are optional)
4477:
4478: =item *
4479:
4480: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
4481: ($udom and $uname are optional)
4482:
4483: =item *
4484:
4485: cput($namespace,$storehash,$udom,$uname) : critical put
4486: ($udom and $uname are optional)
4487:
4488: =item *
4489:
4490: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4491: reference filled in from namesp (encrypts the return communication)
4492: ($udom and $uname are optional)
4493:
4494: =item *
4495:
4496: log($udom,$name,$home,$message) : write to permanent log for user; use
4497: critical subroutine
4498:
4499: =back
4500:
4501: =head2 Network Status Functions
4502:
4503: =over 4
4504:
4505: =item *
4506:
4507: dirlist($uri) : return directory list based on URI
4508:
4509: =item *
4510:
4511: spareserver() : find server with least workload from spare.tab
4512:
4513: =back
4514:
4515: =head2 Apache Request
4516:
4517: =over 4
4518:
4519: =item *
4520:
4521: ssi($url,%hash) : server side include, does a complete request cycle on url to
4522: localhost, posts hash
4523:
4524: =back
4525:
4526: =head2 Data to String to Data
4527:
4528: =over 4
4529:
4530: =item *
4531:
4532: hash2str(%hash) : convert a hash into a string complete with escaping and '='
4533: and '&' separators, supports elements that are arrayrefs and hashrefs
4534:
4535: =item *
4536:
4537: hashref2str($hashref) : convert a hashref into a string complete with
4538: escaping and '=' and '&' separators, supports elements that are
4539: arrayrefs and hashrefs
4540:
4541: =item *
4542:
4543: arrayref2str($arrayref) : convert an arrayref into a string complete
4544: with escaping and '&' separators, supports elements that are arrayrefs
4545: and hashrefs
4546:
4547: =item *
4548:
4549: str2hash($string) : convert string to hash using unescaping and
4550: splitting on '=' and '&', supports elements that are arrayrefs and
4551: hashrefs
4552:
4553: =item *
4554:
4555: str2array($string) : convert string to hash using unescaping and
4556: splitting on '&', supports elements that are arrayrefs and hashrefs
4557:
4558: =back
4559:
4560: =head2 Logging Routines
4561:
4562: =over 4
4563:
4564: These routines allow one to make log messages in the lonnet.log and
4565: lonnet.perm logfiles.
4566:
4567: =item *
4568:
4569: logtouch() : make sure the logfile, lonnet.log, exists
4570:
4571: =item *
4572:
4573: logthis() : append message to the normal lonnet.log file, it gets
4574: preiodically rolled over and deleted.
4575:
4576: =item *
4577:
4578: logperm() : append a permanent message to lonnet.perm.log, this log
4579: file never gets deleted by any automated portion of the system, only
4580: messages of critical importance should go in here.
4581:
4582: =back
4583:
4584: =head2 General File Helper Routines
4585:
4586: =over 4
4587:
4588: =item *
4589:
4590: getfile($file) : returns the entire contents of a file or -1; it
4591: properly subscribes to and replicates the file if neccessary.
4592:
4593: =item *
4594:
4595: filelocation($dir,$file) : returns file system location of a file
4596: based on URI; meant to be "fairly clean" absolute reference, $dir is a
4597: directory that relative $file lookups are to looked in ($dir of /a/dir
4598: and a file of ../bob will become /a/bob)
4599:
4600: =item *
4601:
4602: hreflocation($dir,$file) : returns file system location or a URL; same as
4603: filelocation except for hrefs
4604:
4605: =item *
4606:
4607: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
4608:
4609: =back
4610:
4611: =head2 HTTP Helper Routines
4612:
4613: =over 4
4614:
4615: =item *
4616:
4617: escape() : unpack non-word characters into CGI-compatible hex codes
4618:
4619: =item *
4620:
4621: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
4622:
4623: =back
4624:
4625: =head1 PRIVATE SUBROUTINES
4626:
4627: =head2 Underlying communication routines (Shouldn't call)
4628:
4629: =over 4
4630:
4631: =item *
4632:
4633: subreply() : tries to pass a message to lonc, returns con_lost if incapable
4634:
4635: =item *
4636:
4637: reply() : uses subreply to send a message to remote machine, logs all failures
4638:
4639: =item *
4640:
4641: critical() : passes a critical message to another server; if cannot
4642: get through then place message in connection buffer directory and
4643: returns con_delayed, if incapable of saving message, returns
4644: con_failed
4645:
4646: =item *
4647:
4648: reconlonc() : tries to reconnect lonc client processes.
4649:
4650: =back
4651:
4652: =head2 Resource Access Logging
4653:
4654: =over 4
4655:
4656: =item *
4657:
4658: flushcourselogs() : flush (save) buffer logs and access logs
4659:
4660: =item *
4661:
4662: courselog($what) : save message for course in hash
4663:
4664: =item *
4665:
4666: courseacclog($what) : save message for course using &courselog(). Perform
4667: special processing for specific resource types (problems, exams, quizzes, etc).
4668:
4669: =item *
4670:
4671: goodbye() : flush course logs and log shutting down; it is called in srm.conf
4672: as a PerlChildExitHandler
4673:
4674: =back
4675:
4676: =head2 Other
4677:
4678: =over 4
4679:
4680: =item *
4681:
4682: symblist($mapname,%newhash) : update symbolic storage links
4683:
4684: =back
4685:
4686: =cut
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