1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.211 2002/05/06 13:46:41 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: # 02/27/01 Scott Harrison
51: # 3/2 Gerd Kortemeyer
52: # 3/15,3/19 Scott Harrison
53: # 3/19,3/20 Gerd Kortemeyer
54: # 3/22,3/27,4/2,4/16,4/17 Scott Harrison
55: # 5/26,5/28 Gerd Kortemeyer
56: # 5/30 H. K. Ng
57: # 6/1 Gerd Kortemeyer
58: # July Guy Albertelli
59: # 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,
60: # 10/2 Gerd Kortemeyer
61: # 10/5,10/10,11/13,11/15 Scott Harrison
62: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
63: # 12/5 Matthew Hall
64: # 12/5 Guy Albertelli
65: # 12/6,12/7,12/12 Gerd Kortemeyer
66: # 12/18 Scott Harrison
67: # 12/21,12/22,12/27,12/28 Gerd Kortemeyer
68: # YEAR=2002
69: # 1/4,2/4,2/7 Gerd Kortemeyer
70: #
71: ###
72:
73: package Apache::lonnet;
74:
75: use strict;
76: use Apache::File;
77: use LWP::UserAgent();
78: use HTTP::Headers;
79: use vars
80: qw(%perlvar %hostname %homecache %hostip %spareid %hostdom
81: %libserv %pr %prp %metacache %packagetab
82: %courselogs %accesshash $processmarker $dumpcount
83: %coursedombuf %coursehombuf %courseresdatacache);
84: use IO::Socket;
85: use GDBM_File;
86: use Apache::Constants qw(:common :http);
87: use HTML::LCParser;
88: use Fcntl qw(:flock);
89: my $readit;
90:
91: # --------------------------------------------------------------------- Logging
92:
93: sub logtouch {
94: my $execdir=$perlvar{'lonDaemons'};
95: unless (-e "$execdir/logs/lonnet.log") {
96: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
97: close $fh;
98: }
99: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
100: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
101: }
102:
103: sub logthis {
104: my $message=shift;
105: my $execdir=$perlvar{'lonDaemons'};
106: my $now=time;
107: my $local=localtime($now);
108: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
109: print $fh "$local ($$): $message\n";
110: return 1;
111: }
112:
113: sub logperm {
114: my $message=shift;
115: my $execdir=$perlvar{'lonDaemons'};
116: my $now=time;
117: my $local=localtime($now);
118: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
119: print $fh "$now:$message:$local\n";
120: return 1;
121: }
122:
123: # -------------------------------------------------- Non-critical communication
124: sub subreply {
125: my ($cmd,$server)=@_;
126: my $peerfile="$perlvar{'lonSockDir'}/$server";
127: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
128: Type => SOCK_STREAM,
129: Timeout => 10)
130: or return "con_lost";
131: print $client "$cmd\n";
132: my $answer=<$client>;
133: if (!$answer) { $answer="con_lost"; }
134: chomp($answer);
135: return $answer;
136: }
137:
138: sub reply {
139: my ($cmd,$server)=@_;
140: unless (defined($hostname{$server})) { return 'no_such_host'; }
141: my $answer=subreply($cmd,$server);
142: if ($answer eq 'con_lost') {
143: sleep 5;
144: $answer=subreply($cmd,$server);
145: if ($answer eq 'con_lost') {
146: &logthis("Second attempt con_lost on $server");
147: my $peerfile="$perlvar{'lonSockDir'}/$server";
148: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
149: Type => SOCK_STREAM,
150: Timeout => 10)
151: or return "con_lost";
152: &logthis("Killing socket");
153: print $client "close_connection_exit\n";
154: sleep 5;
155: $answer=subreply($cmd,$server);
156: }
157: }
158: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
159: &logthis("<font color=blue>WARNING:".
160: " $cmd to $server returned $answer</font>");
161: }
162: return $answer;
163: }
164:
165: # ----------------------------------------------------------- Send USR1 to lonc
166:
167: sub reconlonc {
168: my $peerfile=shift;
169: &logthis("Trying to reconnect for $peerfile");
170: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
171: if (my $fh=Apache::File->new("$loncfile")) {
172: my $loncpid=<$fh>;
173: chomp($loncpid);
174: if (kill 0 => $loncpid) {
175: &logthis("lonc at pid $loncpid responding, sending USR1");
176: kill USR1 => $loncpid;
177: sleep 1;
178: if (-e "$peerfile") { return; }
179: &logthis("$peerfile still not there, give it another try");
180: sleep 5;
181: if (-e "$peerfile") { return; }
182: &logthis(
183: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
184: } else {
185: &logthis(
186: "<font color=blue>WARNING:".
187: " lonc at pid $loncpid not responding, giving up</font>");
188: }
189: } else {
190: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
191: }
192: }
193:
194: # ------------------------------------------------------ Critical communication
195:
196: sub critical {
197: my ($cmd,$server)=@_;
198: unless ($hostname{$server}) {
199: &logthis("<font color=blue>WARNING:".
200: " Critical message to unknown server ($server)</font>");
201: return 'no_such_host';
202: }
203: my $answer=reply($cmd,$server);
204: if ($answer eq 'con_lost') {
205: my $pingreply=reply('ping',$server);
206: &reconlonc("$perlvar{'lonSockDir'}/$server");
207: my $pongreply=reply('pong',$server);
208: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
209: $answer=reply($cmd,$server);
210: if ($answer eq 'con_lost') {
211: my $now=time;
212: my $middlename=$cmd;
213: $middlename=substr($middlename,0,16);
214: $middlename=~s/\W//g;
215: my $dfilename=
216: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
217: {
218: my $dfh;
219: if ($dfh=Apache::File->new(">$dfilename")) {
220: print $dfh "$cmd\n";
221: }
222: }
223: sleep 2;
224: my $wcmd='';
225: {
226: my $dfh;
227: if ($dfh=Apache::File->new("$dfilename")) {
228: $wcmd=<$dfh>;
229: }
230: }
231: chomp($wcmd);
232: if ($wcmd eq $cmd) {
233: &logthis("<font color=blue>WARNING: ".
234: "Connection buffer $dfilename: $cmd</font>");
235: &logperm("D:$server:$cmd");
236: return 'con_delayed';
237: } else {
238: &logthis("<font color=red>CRITICAL:"
239: ." Critical connection failed: $server $cmd</font>");
240: &logperm("F:$server:$cmd");
241: return 'con_failed';
242: }
243: }
244: }
245: return $answer;
246: }
247:
248: # ---------------------------------------------------------- Append Environment
249:
250: sub appenv {
251: my %newenv=@_;
252: foreach (keys %newenv) {
253: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
254: &logthis("<font color=blue>WARNING: ".
255: "Attempt to modify environment ".$_." to ".$newenv{$_}
256: .'</font>');
257: delete($newenv{$_});
258: } else {
259: $ENV{$_}=$newenv{$_};
260: }
261: }
262:
263: my $lockfh;
264: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
265: return 'error: '.$!;
266: }
267: unless (flock($lockfh,LOCK_EX)) {
268: &logthis("<font color=blue>WARNING: ".
269: 'Could not obtain exclusive lock in appenv: '.$!);
270: $lockfh->close();
271: return 'error: '.$!;
272: }
273:
274: my @oldenv;
275: {
276: my $fh;
277: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
278: return 'error: '.$!;
279: }
280: @oldenv=<$fh>;
281: $fh->close();
282: }
283: for (my $i=0; $i<=$#oldenv; $i++) {
284: chomp($oldenv[$i]);
285: if ($oldenv[$i] ne '') {
286: my ($name,$value)=split(/=/,$oldenv[$i]);
287: unless (defined($newenv{$name})) {
288: $newenv{$name}=$value;
289: }
290: }
291: }
292: {
293: my $fh;
294: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
295: return 'error';
296: }
297: my $newname;
298: foreach $newname (keys %newenv) {
299: print $fh "$newname=$newenv{$newname}\n";
300: }
301: $fh->close();
302: }
303:
304: $lockfh->close();
305: return 'ok';
306: }
307: # ----------------------------------------------------- Delete from Environment
308:
309: sub delenv {
310: my $delthis=shift;
311: my %newenv=();
312: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
313: &logthis("<font color=blue>WARNING: ".
314: "Attempt to delete from environment ".$delthis);
315: return 'error';
316: }
317: my @oldenv;
318: {
319: my $fh;
320: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
321: return 'error';
322: }
323: unless (flock($fh,LOCK_SH)) {
324: &logthis("<font color=blue>WARNING: ".
325: 'Could not obtain shared lock in delenv: '.$!);
326: $fh->close();
327: return 'error: '.$!;
328: }
329: @oldenv=<$fh>;
330: $fh->close();
331: }
332: {
333: my $fh;
334: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
335: return 'error';
336: }
337: unless (flock($fh,LOCK_EX)) {
338: &logthis("<font color=blue>WARNING: ".
339: 'Could not obtain exclusive lock in delenv: '.$!);
340: $fh->close();
341: return 'error: '.$!;
342: }
343: foreach (@oldenv) {
344: unless ($_=~/^$delthis/) { print $fh $_; }
345: }
346: $fh->close();
347: }
348: return 'ok';
349: }
350:
351: # ------------------------------ Find server with least workload from spare.tab
352:
353: sub spareserver {
354: my $tryserver;
355: my $spareserver='';
356: my $lowestserver=100;
357: foreach $tryserver (keys %spareid) {
358: my $answer=reply('load',$tryserver);
359: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
360: $spareserver="http://$hostname{$tryserver}";
361: $lowestserver=$answer;
362: }
363: }
364: return $spareserver;
365: }
366:
367: # --------------------------------------------- Try to change a user's password
368:
369: sub changepass {
370: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
371: $currentpass = &escape($currentpass);
372: $newpass = &escape($newpass);
373: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
374: $server);
375: if (! $answer) {
376: &logthis("No reply on password change request to $server ".
377: "by $uname in domain $udom.");
378: } elsif ($answer =~ "^ok") {
379: &logthis("$uname in $udom successfully changed their password ".
380: "on $server.");
381: } elsif ($answer =~ "^pwchange_failure") {
382: &logthis("$uname in $udom was unable to change their password ".
383: "on $server. The action was blocked by either lcpasswd ".
384: "or pwchange");
385: } elsif ($answer =~ "^non_authorized") {
386: &logthis("$uname in $udom did not get their password correct when ".
387: "attempting to change it on $server.");
388: } elsif ($answer =~ "^auth_mode_error") {
389: &logthis("$uname in $udom attempted to change their password despite ".
390: "not being locally or internally authenticated on $server.");
391: } elsif ($answer =~ "^unknown_user") {
392: &logthis("$uname in $udom attempted to change their password ".
393: "on $server but were unable to because $server is not ".
394: "their home server.");
395: } elsif ($answer =~ "^refused") {
396: &logthis("$server refused to change $uname in $udom password because ".
397: "it was sent an unencrypted request to change the password.");
398: }
399: return $answer;
400: }
401:
402: # ----------------------- Try to determine user's current authentication scheme
403:
404: sub queryauthenticate {
405: my ($uname,$udom)=@_;
406: if (($perlvar{'lonRole'} eq 'library') &&
407: ($udom eq $perlvar{'lonDefDomain'})) {
408: my $answer=reply("encrypt:currentauth:$udom:$uname",
409: $perlvar{'lonHostID'});
410: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
411: if (length($answer)) {
412: return $answer;
413: }
414: else {
415: &logthis("User $uname at $udom lacks an authentication mechanism");
416: return 'no_host';
417: }
418: }
419: }
420:
421: my $tryserver;
422: foreach $tryserver (keys %libserv) {
423: if ($hostdom{$tryserver} eq $udom) {
424: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
425: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
426: if (length($answer)) {
427: return $answer;
428: }
429: else {
430: &logthis("User $uname at $udom lacks an authentication mechanism");
431: return 'no_host';
432: }
433: }
434: }
435: }
436: &logthis("User $uname at $udom lacks an authentication mechanism");
437: return 'no_host';
438: }
439:
440: # --------- Try to authenticate user from domain's lib servers (first this one)
441:
442: sub authenticate {
443: my ($uname,$upass,$udom)=@_;
444: $upass=escape($upass);
445: $uname=~s/\W//g;
446: if (($perlvar{'lonRole'} eq 'library') &&
447: ($udom eq $perlvar{'lonDefDomain'})) {
448: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
449: if ($answer =~ /authorized/) {
450: if ($answer eq 'authorized') {
451: &logthis("User $uname at $udom authorized by local server");
452: return $perlvar{'lonHostID'};
453: }
454: if ($answer eq 'non_authorized') {
455: &logthis("User $uname at $udom rejected by local server");
456: return 'no_host';
457: }
458: }
459: }
460:
461: my $tryserver;
462: foreach $tryserver (keys %libserv) {
463: if ($hostdom{$tryserver} eq $udom) {
464: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
465: if ($answer =~ /authorized/) {
466: if ($answer eq 'authorized') {
467: &logthis("User $uname at $udom authorized by $tryserver");
468: return $tryserver;
469: }
470: if ($answer eq 'non_authorized') {
471: &logthis("User $uname at $udom rejected by $tryserver");
472: return 'no_host';
473: }
474: }
475: }
476: }
477: &logthis("User $uname at $udom could not be authenticated");
478: return 'no_host';
479: }
480:
481: # ---------------------- Find the homebase for a user from domain's lib servers
482:
483: sub homeserver {
484: my ($uname,$udom)=@_;
485:
486: my $index="$uname:$udom";
487: if ($homecache{$index}) { return "$homecache{$index}"; }
488:
489: my $tryserver;
490: foreach $tryserver (keys %libserv) {
491: if ($hostdom{$tryserver} eq $udom) {
492: my $answer=reply("home:$udom:$uname",$tryserver);
493: if ($answer eq 'found') {
494: $homecache{$index}=$tryserver;
495: return $tryserver;
496: }
497: }
498: }
499: return 'no_host';
500: }
501:
502: # ------------------------------------- Find the usernames behind a list of IDs
503:
504: sub idget {
505: my ($udom,@ids)=@_;
506: my %returnhash=();
507:
508: my $tryserver;
509: foreach $tryserver (keys %libserv) {
510: if ($hostdom{$tryserver} eq $udom) {
511: my $idlist=join('&',@ids);
512: $idlist=~tr/A-Z/a-z/;
513: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
514: my @answer=();
515: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
516: @answer=split(/\&/,$reply);
517: } ;
518: my $i;
519: for ($i=0;$i<=$#ids;$i++) {
520: if ($answer[$i]) {
521: $returnhash{$ids[$i]}=$answer[$i];
522: }
523: }
524: }
525: }
526: return %returnhash;
527: }
528:
529: # ------------------------------------- Find the IDs behind a list of usernames
530:
531: sub idrget {
532: my ($udom,@unames)=@_;
533: my %returnhash=();
534: foreach (@unames) {
535: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
536: }
537: return %returnhash;
538: }
539:
540: # ------------------------------- Store away a list of names and associated IDs
541:
542: sub idput {
543: my ($udom,%ids)=@_;
544: my %servers=();
545: foreach (keys %ids) {
546: my $uhom=&homeserver($_,$udom);
547: if ($uhom ne 'no_host') {
548: my $id=&escape($ids{$_});
549: $id=~tr/A-Z/a-z/;
550: my $unam=&escape($_);
551: if ($servers{$uhom}) {
552: $servers{$uhom}.='&'.$id.'='.$unam;
553: } else {
554: $servers{$uhom}=$id.'='.$unam;
555: }
556: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
557: }
558: }
559: foreach (keys %servers) {
560: &critical('idput:'.$udom.':'.$servers{$_},$_);
561: }
562: }
563:
564: # ------------------------------------- Find the section of student in a course
565:
566: sub usection {
567: my ($udom,$unam,$courseid)=@_;
568: $courseid=~s/\_/\//g;
569: $courseid=~s/^(\w)/\/$1/;
570: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
571: &homeserver($unam,$udom)))) {
572: my ($key,$value)=split(/\=/,$_);
573: $key=&unescape($key);
574: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
575: my $section=$1;
576: if ($key eq $courseid.'_st') { $section=''; }
577: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
578: my $now=time;
579: my $notactive=0;
580: if ($start) {
581: if ($now<$start) { $notactive=1; }
582: }
583: if ($end) {
584: if ($now>$end) { $notactive=1; }
585: }
586: unless ($notactive) { return $section; }
587: }
588: }
589: return '-1';
590: }
591:
592: # ------------------------------------- Read an entry from a user's environment
593:
594: sub userenvironment {
595: my ($udom,$unam,@what)=@_;
596: my %returnhash=();
597: my @answer=split(/\&/,
598: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
599: &homeserver($unam,$udom)));
600: my $i;
601: for ($i=0;$i<=$#what;$i++) {
602: $returnhash{$what[$i]}=&unescape($answer[$i]);
603: }
604: return %returnhash;
605: }
606:
607: # ----------------------------- Subscribe to a resource, return URL if possible
608:
609: sub subscribe {
610: my $fname=shift;
611: my $author=$fname;
612: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
613: my ($udom,$uname)=split(/\//,$author);
614: my $home=homeserver($uname,$udom);
615: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
616: return 'not_found';
617: }
618: my $answer=reply("sub:$fname",$home);
619: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
620: $answer.=' by '.$home;
621: }
622: return $answer;
623: }
624:
625: # -------------------------------------------------------------- Replicate file
626:
627: sub repcopy {
628: my $filename=shift;
629: $filename=~s/\/+/\//g;
630: my $transname="$filename.in.transfer";
631: if ((-e $filename) || (-e $transname)) { return OK; }
632: my $remoteurl=subscribe($filename);
633: if ($remoteurl =~ /^con_lost by/) {
634: &logthis("Subscribe returned $remoteurl: $filename");
635: return HTTP_SERVICE_UNAVAILABLE;
636: } elsif ($remoteurl eq 'not_found') {
637: &logthis("Subscribe returned not_found: $filename");
638: return HTTP_NOT_FOUND;
639: } elsif ($remoteurl =~ /^rejected by/) {
640: &logthis("Subscribe returned $remoteurl: $filename");
641: return FORBIDDEN;
642: } elsif ($remoteurl eq 'directory') {
643: return OK;
644: } else {
645: my @parts=split(/\//,$filename);
646: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
647: if ($path ne "$perlvar{'lonDocRoot'}/res") {
648: &logthis("Malconfiguration for replication: $filename");
649: return HTTP_BAD_REQUEST;
650: }
651: my $count;
652: for ($count=5;$count<$#parts;$count++) {
653: $path.="/$parts[$count]";
654: if ((-e $path)!=1) {
655: mkdir($path,0777);
656: }
657: }
658: my $ua=new LWP::UserAgent;
659: my $request=new HTTP::Request('GET',"$remoteurl");
660: my $response=$ua->request($request,$transname);
661: if ($response->is_error()) {
662: unlink($transname);
663: my $message=$response->status_line;
664: &logthis("<font color=blue>WARNING:"
665: ." LWP get: $message: $filename</font>");
666: return HTTP_SERVICE_UNAVAILABLE;
667: } else {
668: if ($remoteurl!~/\.meta$/) {
669: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
670: my $mresponse=$ua->request($mrequest,$filename.'.meta');
671: if ($mresponse->is_error()) {
672: unlink($filename.'.meta');
673: &logthis(
674: "<font color=yellow>INFO: No metadata: $filename</font>");
675: }
676: }
677: rename($transname,$filename);
678: return OK;
679: }
680: }
681: }
682:
683: # --------------------------------------------------------- Server Side Include
684:
685: sub ssi {
686:
687: my ($fn,%form)=@_;
688:
689: my $ua=new LWP::UserAgent;
690:
691: my $request;
692:
693: if (%form) {
694: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
695: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
696: } else {
697: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
698: }
699:
700: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
701: my $response=$ua->request($request);
702:
703: return $response->content;
704: }
705:
706: # ------------------------------------------------------------------------- Log
707:
708: sub log {
709: my ($dom,$nam,$hom,$what)=@_;
710: return critical("log:$dom:$nam:$what",$hom);
711: }
712:
713: # ------------------------------------------------------------------ Course Log
714:
715: sub flushcourselogs {
716: &logthis('Flushing course log buffers');
717: foreach (keys %courselogs) {
718: my $crsid=$_;
719: &logthis(":$crsid:$coursehombuf{$crsid}");
720: if (&reply('log:'.$coursedombuf{$crsid}.':'.
721: &escape($courselogs{$crsid}),
722: $coursehombuf{$crsid}) eq 'ok') {
723: delete $courselogs{$crsid};
724: } else {
725: &logthis('Failed to flush log buffer for '.$crsid);
726: if (length($courselogs{$crsid})>40000) {
727: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
728: " exceeded maximum size, deleting.</font>");
729: delete $courselogs{$crsid};
730: }
731: }
732: }
733: &logthis('Flushing access logs');
734: foreach (keys %accesshash) {
735: my $entry=$_;
736: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
737: my %temphash=($entry => $accesshash{$entry});
738: if (&Apache::lonnet::put('resevaldata',\%temphash,$1,$2) eq 'ok') {
739: delete $accesshash{$entry};
740: }
741: }
742: $dumpcount++;
743: }
744:
745: sub courselog {
746: my $what=shift;
747: $what=time.':'.$what;
748: unless ($ENV{'request.course.id'}) { return ''; }
749: $coursedombuf{$ENV{'request.course.id'}}=
750: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
751: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
752: $coursehombuf{$ENV{'request.course.id'}}=
753: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
754: if (defined $courselogs{$ENV{'request.course.id'}}) {
755: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
756: } else {
757: $courselogs{$ENV{'request.course.id'}}.=$what;
758: }
759: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
760: &flushcourselogs();
761: }
762: }
763:
764: sub courseacclog {
765: my $fnsymb=shift;
766: unless ($ENV{'request.course.id'}) { return ''; }
767: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
768: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
769: $what.=':POST';
770: foreach (keys %ENV) {
771: if ($_=~/^form\.(.*)/) {
772: $what.=':'.$1.'='.$ENV{$_};
773: }
774: }
775: }
776: &courselog($what);
777: }
778:
779: sub countacc {
780: my $url=&declutter(shift);
781: unless ($ENV{'request.course.id'}) { return ''; }
782: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
783: my $key=$processmarker.'_'.$dumpcount.'___'.$url.'___count';
784: if (defined($accesshash{$key})) {
785: $accesshash{$key}++;
786: } else {
787: $accesshash{$key}=1;
788: }
789: }
790:
791: # ----------------------------------------------------------- Check out an item
792:
793: sub checkout {
794: my ($symb,$tuname,$tudom,$tcrsid)=@_;
795: my $now=time;
796: my $lonhost=$perlvar{'lonHostID'};
797: my $infostr=&escape(
798: $tuname.'&'.
799: $tudom.'&'.
800: $tcrsid.'&'.
801: $symb.'&'.
802: $now.'&'.$ENV{'REMOTE_ADDR'});
803: my $token=&reply('tmpput:'.$infostr,$lonhost);
804: if ($token=~/^error\:/) {
805: &logthis("<font color=blue>WARNING: ".
806: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
807: "</font>");
808: return '';
809: }
810:
811: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
812: $token=~tr/a-z/A-Z/;
813:
814: my %infohash=('resource.0.outtoken' => $token,
815: 'resource.0.checkouttime' => $now,
816: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
817:
818: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
819: return '';
820: } else {
821: &logthis("<font color=blue>WARNING: ".
822: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
823: "</font>");
824: }
825:
826: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
827: &escape('Checkout '.$infostr.' - '.
828: $token)) ne 'ok') {
829: return '';
830: } else {
831: &logthis("<font color=blue>WARNING: ".
832: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
833: "</font>");
834: }
835: return $token;
836: }
837:
838: # ------------------------------------------------------------ Check in an item
839:
840: sub checkin {
841: my $token=shift;
842: my $now=time;
843: my ($ta,$tb,$lonhost)=split(/\*/,$token);
844: $lonhost=~tr/A-Z/a-z/;
845: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
846: $dtoken=~s/\W/\_/g;
847: my ($tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
848: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
849:
850: unless (($tuname) && ($tudom)) {
851: &logthis('Check in '.$token.' ('.$dtoken.') failed');
852: return '';
853: }
854:
855: unless (&allowed('mgr',$tcrsid)) {
856: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
857: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
858: return '';
859: }
860:
861: my %infohash=('resource.0.intoken' => $token,
862: 'resource.0.checkintime' => $now,
863: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
864:
865: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
866: return '';
867: }
868:
869: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
870: &escape('Checkin - '.$token)) ne 'ok') {
871: return '';
872: }
873:
874: return ($symb,$tuname,$tudom,$tcrsid);
875: }
876:
877: # --------------------------------------------- Set Expire Date for Spreadsheet
878:
879: sub expirespread {
880: my ($uname,$udom,$stype,$usymb)=@_;
881: my $cid=$ENV{'request.course.id'};
882: if ($cid) {
883: my $now=time;
884: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
885: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
886: $ENV{'course.'.$cid.'.num'}.
887: ':nohist_expirationdates:'.
888: &escape($key).'='.$now,
889: $ENV{'course.'.$cid.'.home'})
890: }
891: return 'ok';
892: }
893:
894: # ----------------------------------------------------- Devalidate Spreadsheets
895:
896: sub devalidate {
897: my $symb=shift;
898: my $cid=$ENV{'request.course.id'};
899: if ($cid) {
900: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
901: my $status=
902: &del('nohist_calculatedsheet',
903: [$key.'studentcalc'],
904: $ENV{'course.'.$cid.'.domain'},
905: $ENV{'course.'.$cid.'.num'})
906: .' '.
907: &del('nohist_calculatedsheets_'.$cid,
908: [$key.'assesscalc:'.$symb]);
909: unless ($status eq 'ok ok') {
910: &logthis('Could not devalidate spreadsheet '.
911: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
912: $symb.': '.$status);
913: }
914: }
915: }
916:
917: sub arrayref2str {
918: my ($arrayref) = @_;
919: my $result='_ARRAY_REF__';
920: foreach my $elem (@$arrayref) {
921: if (ref($elem) eq 'ARRAY') {
922: $result.=&escape(&arrayref2str($elem)).'&';
923: } elsif (ref($elem) eq 'HASH') {
924: $result.=&escape(&hashref2str($elem)).'&';
925: } elsif (ref($elem)) {
926: &logthis("Got a ref of ".(ref($elem))." skipping.");
927: } else {
928: $result.=&escape($elem).'&';
929: }
930: }
931: $result=~s/\&$//;
932: return $result;
933: }
934:
935: sub hash2str {
936: my (%hash) = @_;
937: my $result=&hashref2str(\%hash);
938: $result=~s/^_HASH_REF__//;
939: return $result;
940: }
941:
942: sub hashref2str {
943: my ($hashref)=@_;
944: my $result='_HASH_REF__';
945: foreach (keys(%$hashref)) {
946: if (ref($_) eq 'ARRAY') {
947: $result.=&escape(&arrayref2str($_)).'=';
948: } elsif (ref($_) eq 'HASH') {
949: $result.=&escape(&hashref2str($_)).'=';
950: } elsif (ref($_)) {
951: &logthis("Got a ref of ".(ref($_))." skipping.");
952: } else {
953: $result.=&escape($_).'=';
954: }
955:
956: if (ref($$hashref{$_}) eq 'ARRAY') {
957: $result.=&escape(&arrayref2str($$hashref{$_})).'&';
958: } elsif (ref($$hashref{$_}) eq 'HASH') {
959: $result.=&escape(&hashref2str($$hashref{$_})).'&';
960: } elsif (ref($$hashref{$_})) {
961: &logthis("Got a ref of ".(ref($$hashref{$_}))." skipping.");
962: } else {
963: $result.=&escape($$hashref{$_}).'&';
964: }
965: }
966: $result=~s/\&$//;
967: return $result;
968: }
969:
970: sub str2hash {
971: my ($string) = @_;
972: my %returnhash;
973: foreach (split(/\&/,$string)) {
974: my ($name,$value)=split(/\=/,$_);
975: $name=&unescape($name);
976: $value=&unescape($value);
977: if ($value =~ /^_HASH_REF__/) {
978: $value =~ s/^_HASH_REF__//;
979: my %hash=&str2hash($value);
980: $value=\%hash;
981: } elsif ($value =~ /^_ARRAY_REF__/) {
982: $value =~ s/^_ARRAY_REF__//;
983: my @array=&str2array($value);
984: $value=\@array;
985: }
986: $returnhash{$name}=$value;
987: }
988: return (%returnhash);
989: }
990:
991: sub str2array {
992: my ($string) = @_;
993: my @returnarray;
994: foreach my $value (split(/\&/,$string)) {
995: $value=&unescape($value);
996: if ($value =~ /^_HASH_REF__/) {
997: $value =~ s/^_HASH_REF__//;
998: my %hash=&str2hash($value);
999: $value=\%hash;
1000: } elsif ($value =~ /^_ARRAY_REF__/) {
1001: $value =~ s/^_ARRAY_REF__//;
1002: my @array=&str2array($value);
1003: $value=\@array;
1004: }
1005: push(@returnarray,$value);
1006: }
1007: return (@returnarray);
1008: }
1009:
1010: # -------------------------------------------------------------------Temp Store
1011:
1012: sub tmpreset {
1013: my ($symb,$namespace,$domain,$stuname) = @_;
1014: if (!$symb) {
1015: $symb=&symbread();
1016: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1017: }
1018: $symb=escape($symb);
1019:
1020: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1021: $namespace=~s/\//\_/g;
1022: $namespace=~s/\W//g;
1023:
1024: #FIXME needs to do something for /pub resources
1025: if (!$domain) { $domain=$ENV{'user.domain'}; }
1026: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1027: my $path=$perlvar{'lonDaemons'}.'/tmp';
1028: my %hash;
1029: if (tie(%hash,'GDBM_File',
1030: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1031: &GDBM_WRCREAT,0640)) {
1032: foreach my $key (keys %hash) {
1033: if ($key=~ /:$symb/) {
1034: delete($hash{$key});
1035: }
1036: }
1037: }
1038: }
1039:
1040: sub tmpstore {
1041: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1042:
1043: if (!$symb) {
1044: $symb=&symbread();
1045: if (!$symb) { $symb= $ENV{'request.url'}; }
1046: }
1047: $symb=escape($symb);
1048:
1049: if (!$namespace) {
1050: # I don't think we would ever want to store this for a course.
1051: # it seems this will only be used if we don't have a course.
1052: #$namespace=$ENV{'request.course.id'};
1053: #if (!$namespace) {
1054: $namespace=$ENV{'request.state'};
1055: #}
1056: }
1057: $namespace=~s/\//\_/g;
1058: $namespace=~s/\W//g;
1059: #FIXME needs to do something for /pub resources
1060: if (!$domain) { $domain=$ENV{'user.domain'}; }
1061: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1062: my $now=time;
1063: my %hash;
1064: my $path=$perlvar{'lonDaemons'}.'/tmp';
1065: if (tie(%hash,'GDBM_File',
1066: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1067: &GDBM_WRCREAT,0640)) {
1068: $hash{"version:$symb"}++;
1069: my $version=$hash{"version:$symb"};
1070: my $allkeys='';
1071: foreach my $key (keys(%$storehash)) {
1072: $allkeys.=$key.':';
1073: $hash{"$version:$symb:$key"}=$$storehash{$key};
1074: }
1075: $hash{"$version:$symb:timestamp"}=$now;
1076: $allkeys.='timestamp';
1077: $hash{"$version:keys:$symb"}=$allkeys;
1078: if (untie(%hash)) {
1079: return 'ok';
1080: } else {
1081: return "error:$!";
1082: }
1083: } else {
1084: return "error:$!";
1085: }
1086: }
1087:
1088: # -----------------------------------------------------------------Temp Restore
1089:
1090: sub tmprestore {
1091: my ($symb,$namespace,$domain,$stuname) = @_;
1092:
1093: if (!$symb) {
1094: $symb=&symbread();
1095: if (!$symb) { $symb= $ENV{'request.url'}; }
1096: }
1097: $symb=escape($symb);
1098:
1099: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1100: #FIXME needs to do something for /pub resources
1101: if (!$domain) { $domain=$ENV{'user.domain'}; }
1102: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1103:
1104: my %returnhash;
1105: $namespace=~s/\//\_/g;
1106: $namespace=~s/\W//g;
1107: my %hash;
1108: my $path=$perlvar{'lonDaemons'}.'/tmp';
1109: if (tie(%hash,'GDBM_File',
1110: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1111: &GDBM_READER,0640)) {
1112: my $version=$hash{"version:$symb"};
1113: $returnhash{'version'}=$version;
1114: my $scope;
1115: for ($scope=1;$scope<=$version;$scope++) {
1116: my $vkeys=$hash{"$scope:keys:$symb"};
1117: my @keys=split(/:/,$vkeys);
1118: my $key;
1119: $returnhash{"$scope:keys"}=$vkeys;
1120: foreach $key (@keys) {
1121: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1122: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1123: }
1124: }
1125: if (!(untie(%hash))) {
1126: return "error:$!";
1127: }
1128: } else {
1129: return "error:$!";
1130: }
1131: return %returnhash;
1132: }
1133:
1134: # ----------------------------------------------------------------------- Store
1135:
1136: sub store {
1137: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1138: my $home='';
1139:
1140: if ($stuname) { $home=&homeserver($stuname,$domain); }
1141:
1142: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1143:
1144: &devalidate($symb);
1145:
1146: $symb=escape($symb);
1147: if (!$namespace) {
1148: unless ($namespace=$ENV{'request.course.id'}) {
1149: return '';
1150: }
1151: }
1152: if (!$domain) { $domain=$ENV{'user.domain'}; }
1153: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1154: if (!$home) { $home=$ENV{'user.home'}; }
1155: my $namevalue='';
1156: foreach (keys %$storehash) {
1157: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1158: }
1159: $namevalue=~s/\&$//;
1160: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1161: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1162: }
1163:
1164: # -------------------------------------------------------------- Critical Store
1165:
1166: sub cstore {
1167: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1168: my $home='';
1169:
1170: if ($stuname) { $home=&homeserver($stuname,$domain); }
1171:
1172: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1173:
1174: &devalidate($symb);
1175:
1176: $symb=escape($symb);
1177: if (!$namespace) {
1178: unless ($namespace=$ENV{'request.course.id'}) {
1179: return '';
1180: }
1181: }
1182: if (!$domain) { $domain=$ENV{'user.domain'}; }
1183: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1184: if (!$home) { $home=$ENV{'user.home'}; }
1185:
1186: my $namevalue='';
1187: foreach (keys %$storehash) {
1188: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1189: }
1190: $namevalue=~s/\&$//;
1191: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1192: return critical
1193: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1194: }
1195:
1196: # --------------------------------------------------------------------- Restore
1197:
1198: sub restore {
1199: my ($symb,$namespace,$domain,$stuname) = @_;
1200: my $home='';
1201:
1202: if ($stuname) { $home=&homeserver($stuname,$domain); }
1203:
1204: if (!$symb) {
1205: unless ($symb=escape(&symbread())) { return ''; }
1206: } else {
1207: $symb=&escape($symb);
1208: }
1209: if (!$namespace) {
1210: unless ($namespace=$ENV{'request.course.id'}) {
1211: return '';
1212: }
1213: }
1214: if (!$domain) { $domain=$ENV{'user.domain'}; }
1215: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1216: if (!$home) { $home=$ENV{'user.home'}; }
1217: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1218:
1219: my %returnhash=();
1220: foreach (split(/\&/,$answer)) {
1221: my ($name,$value)=split(/\=/,$_);
1222: $returnhash{&unescape($name)}=&unescape($value);
1223: }
1224: my $version;
1225: for ($version=1;$version<=$returnhash{'version'};$version++) {
1226: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1227: $returnhash{$_}=$returnhash{$version.':'.$_};
1228: }
1229: }
1230: return %returnhash;
1231: }
1232:
1233: # ---------------------------------------------------------- Course Description
1234:
1235: sub coursedescription {
1236: my $courseid=shift;
1237: $courseid=~s/^\///;
1238: $courseid=~s/\_/\//g;
1239: my ($cdomain,$cnum)=split(/\//,$courseid);
1240: my $chome=&homeserver($cnum,$cdomain);
1241: if ($chome ne 'no_host') {
1242: my %returnhash=&dump('environment',$cdomain,$cnum);
1243: if (!exists($returnhash{'con_lost'})) {
1244: my $normalid=$cdomain.'_'.$cnum;
1245: my %envhash=();
1246: $returnhash{'home'}= $chome;
1247: $returnhash{'domain'} = $cdomain;
1248: $returnhash{'num'} = $cnum;
1249: while (my ($name,$value) = each %returnhash) {
1250: $envhash{'course.'.$normalid.'.'.$name}=$value;
1251: }
1252: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
1253: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1254: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1255: $envhash{'course.'.$normalid.'.last_cache'}=time;
1256: $envhash{'course.'.$normalid.'.home'}=$chome;
1257: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1258: $envhash{'course.'.$normalid.'.num'}=$cnum;
1259: &appenv(%envhash);
1260: return %returnhash;
1261: }
1262: }
1263: return ();
1264: }
1265:
1266: # -------------------------------------------------------- Get user privileges
1267:
1268: sub rolesinit {
1269: my ($domain,$username,$authhost)=@_;
1270: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1271: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1272: my %allroles=();
1273: my %thesepriv=();
1274: my $now=time;
1275: my $userroles="user.login.time=$now\n";
1276: my $thesestr;
1277:
1278: if ($rolesdump ne '') {
1279: foreach (split(/&/,$rolesdump)) {
1280: if ($_!~/^rolesdef\&/) {
1281: my ($area,$role)=split(/=/,$_);
1282: $area=~s/\_\w\w$//;
1283: my ($trole,$tend,$tstart)=split(/_/,$role);
1284: $userroles.='user.role.'.$trole.'.'.$area.'='.
1285: $tstart.'.'.$tend."\n";
1286: if ($tend!=0) {
1287: if ($tend<$now) {
1288: $trole='';
1289: }
1290: }
1291: if ($tstart!=0) {
1292: if ($tstart>$now) {
1293: $trole='';
1294: }
1295: }
1296: if (($area ne '') && ($trole ne '')) {
1297: my $spec=$trole.'.'.$area;
1298: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1299: if ($trole =~ /^cr\//) {
1300: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1301: my $homsvr=homeserver($rauthor,$rdomain);
1302: if ($hostname{$homsvr} ne '') {
1303: my $roledef=
1304: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1305: $homsvr);
1306: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1307: my ($syspriv,$dompriv,$coursepriv)=
1308: split(/\_/,unescape($roledef));
1309: $allroles{'cm./'}.=':'.$syspriv;
1310: $allroles{$spec.'./'}.=':'.$syspriv;
1311: if ($tdomain ne '') {
1312: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1313: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1314: if ($trest ne '') {
1315: $allroles{'cm.'.$area}.=':'.$coursepriv;
1316: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1317: }
1318: }
1319: }
1320: }
1321: } else {
1322: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1323: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1324: if ($tdomain ne '') {
1325: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1326: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1327: if ($trest ne '') {
1328: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1329: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1330: }
1331: }
1332: }
1333: }
1334: }
1335: }
1336: my $adv=0;
1337: my $author=0;
1338: foreach (keys %allroles) {
1339: %thesepriv=();
1340: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1341: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1342: foreach (split(/:/,$allroles{$_})) {
1343: if ($_ ne '') {
1344: my ($privilege,$restrictions)=split(/&/,$_);
1345: if ($restrictions eq '') {
1346: $thesepriv{$privilege}='F';
1347: } else {
1348: if ($thesepriv{$privilege} ne 'F') {
1349: $thesepriv{$privilege}.=$restrictions;
1350: }
1351: }
1352: }
1353: }
1354: $thesestr='';
1355: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1356: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1357: }
1358: $userroles.='user.adv='.$adv."\n".
1359: 'user.author='.$author."\n";
1360: $ENV{'user.adv'}=$adv;
1361: }
1362: return $userroles;
1363: }
1364:
1365: # --------------------------------------------------------------- get interface
1366:
1367: sub get {
1368: my ($namespace,$storearr,$udomain,$uname)=@_;
1369: my $items='';
1370: foreach (@$storearr) {
1371: $items.=escape($_).'&';
1372: }
1373: $items=~s/\&$//;
1374: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1375: if (!$uname) { $uname=$ENV{'user.name'}; }
1376: my $uhome=&homeserver($uname,$udomain);
1377:
1378: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1379: my @pairs=split(/\&/,$rep);
1380: my %returnhash=();
1381: my $i=0;
1382: foreach (@$storearr) {
1383: $returnhash{$_}=unescape($pairs[$i]);
1384: $i++;
1385: }
1386: return %returnhash;
1387: }
1388:
1389: # --------------------------------------------------------------- del interface
1390:
1391: sub del {
1392: my ($namespace,$storearr,$udomain,$uname)=@_;
1393: my $items='';
1394: foreach (@$storearr) {
1395: $items.=escape($_).'&';
1396: }
1397: $items=~s/\&$//;
1398: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1399: if (!$uname) { $uname=$ENV{'user.name'}; }
1400: my $uhome=&homeserver($uname,$udomain);
1401:
1402: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1403: }
1404:
1405: # -------------------------------------------------------------- dump interface
1406:
1407: sub dump {
1408: my ($namespace,$udomain,$uname,$regexp)=@_;
1409: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1410: if (!$uname) { $uname=$ENV{'user.name'}; }
1411: my $uhome=&homeserver($uname,$udomain);
1412: if ($regexp) {
1413: $regexp=&escape($regexp);
1414: } else {
1415: $regexp='.';
1416: }
1417: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1418: my @pairs=split(/\&/,$rep);
1419: my %returnhash=();
1420: foreach (@pairs) {
1421: my ($key,$value)=split(/=/,$_);
1422: $returnhash{unescape($key)}=unescape($value);
1423: }
1424: return %returnhash;
1425: }
1426:
1427: # --------------------------------------------------------------- put interface
1428:
1429: sub put {
1430: my ($namespace,$storehash,$udomain,$uname)=@_;
1431: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1432: if (!$uname) { $uname=$ENV{'user.name'}; }
1433: my $uhome=&homeserver($uname,$udomain);
1434: my $items='';
1435: foreach (keys %$storehash) {
1436: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1437: }
1438: $items=~s/\&$//;
1439: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1440: }
1441:
1442: # ------------------------------------------------------ critical put interface
1443:
1444: sub cput {
1445: my ($namespace,$storehash,$udomain,$uname)=@_;
1446: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1447: if (!$uname) { $uname=$ENV{'user.name'}; }
1448: my $uhome=&homeserver($uname,$udomain);
1449: my $items='';
1450: foreach (keys %$storehash) {
1451: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1452: }
1453: $items=~s/\&$//;
1454: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1455: }
1456:
1457: # -------------------------------------------------------------- eget interface
1458:
1459: sub eget {
1460: my ($namespace,$storearr,$udomain,$uname)=@_;
1461: my $items='';
1462: foreach (@$storearr) {
1463: $items.=escape($_).'&';
1464: }
1465: $items=~s/\&$//;
1466: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1467: if (!$uname) { $uname=$ENV{'user.name'}; }
1468: my $uhome=&homeserver($uname,$udomain);
1469: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1470: my @pairs=split(/\&/,$rep);
1471: my %returnhash=();
1472: my $i=0;
1473: foreach (@$storearr) {
1474: $returnhash{$_}=unescape($pairs[$i]);
1475: $i++;
1476: }
1477: return %returnhash;
1478: }
1479:
1480: # ------------------------------------------------- Check for a user privilege
1481:
1482: sub allowed {
1483: my ($priv,$uri)=@_;
1484:
1485: my $orguri=$uri;
1486: $uri=&declutter($uri);
1487:
1488: # Free bre access to adm and meta resources
1489:
1490: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1491: return 'F';
1492: }
1493:
1494: # Free bre to public access
1495:
1496: if ($priv eq 'bre') {
1497: if (&metadata($uri,'copyright') eq 'public') { return 'F'; }
1498: }
1499:
1500: my $thisallowed='';
1501: my $statecond=0;
1502: my $courseprivid='';
1503:
1504: # Course
1505:
1506: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1507: $thisallowed.=$1;
1508: }
1509:
1510: # Domain
1511:
1512: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1513: =~/$priv\&([^\:]*)/) {
1514: $thisallowed.=$1;
1515: }
1516:
1517: # Course: uri itself is a course
1518: my $courseuri=$uri;
1519: $courseuri=~s/\_(\d)/\/$1/;
1520: $courseuri=~s/^([^\/])/\/$1/;
1521:
1522: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1523: =~/$priv\&([^\:]*)/) {
1524: $thisallowed.=$1;
1525: }
1526:
1527: # Full access at system, domain or course-wide level? Exit.
1528:
1529: if ($thisallowed=~/F/) {
1530: return 'F';
1531: }
1532:
1533: # If this is generating or modifying users, exit with special codes
1534:
1535: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1536: return $thisallowed;
1537: }
1538: #
1539: # Gathered so far: system, domain and course wide privileges
1540: #
1541: # Course: See if uri or referer is an individual resource that is part of
1542: # the course
1543:
1544: if ($ENV{'request.course.id'}) {
1545: $courseprivid=$ENV{'request.course.id'};
1546: if ($ENV{'request.course.sec'}) {
1547: $courseprivid.='/'.$ENV{'request.course.sec'};
1548: }
1549: $courseprivid=~s/\_/\//;
1550: my $checkreferer=1;
1551: my @uriparts=split(/\//,$uri);
1552: my $filename=$uriparts[$#uriparts];
1553: my $pathname=$uri;
1554: $pathname=~s/\/$filename$//;
1555: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1556: /\&$filename\:([\d\|]+)\&/) {
1557: $statecond=$1;
1558: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1559: =~/$priv\&([^\:]*)/) {
1560: $thisallowed.=$1;
1561: $checkreferer=0;
1562: }
1563: }
1564:
1565: if ($checkreferer) {
1566: my $refuri=$ENV{'httpref.'.$orguri};
1567:
1568: unless ($refuri) {
1569: foreach (keys %ENV) {
1570: if ($_=~/^httpref\..*\*/) {
1571: my $pattern=$_;
1572: $pattern=~s/^httpref\.\/res\///;
1573: $pattern=~s/\*/\[\^\/\]\+/g;
1574: $pattern=~s/\//\\\//g;
1575: if ($orguri=~/$pattern/) {
1576: $refuri=$ENV{$_};
1577: }
1578: }
1579: }
1580: }
1581: if ($refuri) {
1582: $refuri=&declutter($refuri);
1583: my @uriparts=split(/\//,$refuri);
1584: my $filename=$uriparts[$#uriparts];
1585: my $pathname=$refuri;
1586: $pathname=~s/\/$filename$//;
1587: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1588: /\&$filename\:([\d\|]+)\&/) {
1589: my $refstatecond=$1;
1590: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1591: =~/$priv\&([^\:]*)/) {
1592: $thisallowed.=$1;
1593: $uri=$refuri;
1594: $statecond=$refstatecond;
1595: }
1596: }
1597: }
1598: }
1599: }
1600:
1601: #
1602: # Gathered now: all privileges that could apply, and condition number
1603: #
1604: #
1605: # Full or no access?
1606: #
1607:
1608: if ($thisallowed=~/F/) {
1609: return 'F';
1610: }
1611:
1612: unless ($thisallowed) {
1613: return '';
1614: }
1615:
1616: # Restrictions exist, deal with them
1617: #
1618: # C:according to course preferences
1619: # R:according to resource settings
1620: # L:unless locked
1621: # X:according to user session state
1622: #
1623:
1624: # Possibly locked functionality, check all courses
1625: # Locks might take effect only after 10 minutes cache expiration for other
1626: # courses, and 2 minutes for current course
1627:
1628: my $envkey;
1629: if ($thisallowed=~/L/) {
1630: foreach $envkey (keys %ENV) {
1631: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1632: my $courseid=$2;
1633: my $roleid=$1.'.'.$2;
1634: $courseid=~s/^\///;
1635: my $expiretime=600;
1636: if ($ENV{'request.role'} eq $roleid) {
1637: $expiretime=120;
1638: }
1639: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1640: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1641: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1642: &coursedescription($courseid);
1643: }
1644: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1645: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1646: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1647: &log($ENV{'user.domain'},$ENV{'user.name'},
1648: $ENV{'user.host'},
1649: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1650: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1651: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1652: return '';
1653: }
1654: }
1655: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1656: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1657: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1658: &log($ENV{'user.domain'},$ENV{'user.name'},
1659: $ENV{'user.host'},
1660: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1661: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1662: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1663: return '';
1664: }
1665: }
1666: }
1667: }
1668: }
1669:
1670: #
1671: # Rest of the restrictions depend on selected course
1672: #
1673:
1674: unless ($ENV{'request.course.id'}) {
1675: return '1';
1676: }
1677:
1678: #
1679: # Now user is definitely in a course
1680: #
1681:
1682:
1683: # Course preferences
1684:
1685: if ($thisallowed=~/C/) {
1686: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1687: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1688: =~/$rolecode/) {
1689: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1690: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1691: $ENV{'request.course.id'});
1692: return '';
1693: }
1694: }
1695:
1696: # Resource preferences
1697:
1698: if ($thisallowed=~/R/) {
1699: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1700: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1701: if (-e $filename) {
1702: my @content;
1703: {
1704: my $fh=Apache::File->new($filename);
1705: @content=<$fh>;
1706: }
1707: if (join('',@content)=~
1708: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1709: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1710: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1711: return '';
1712:
1713: }
1714: }
1715: }
1716:
1717: # Restricted by state?
1718:
1719: if ($thisallowed=~/X/) {
1720: if (&condval($statecond)) {
1721: return '2';
1722: } else {
1723: return '';
1724: }
1725: }
1726:
1727: return 'F';
1728: }
1729:
1730: # ----------------------------------------------------------------- Define Role
1731:
1732: sub definerole {
1733: if (allowed('mcr','/')) {
1734: my ($rolename,$sysrole,$domrole,$courole)=@_;
1735: foreach (split('/',$sysrole)) {
1736: my ($crole,$cqual)=split(/\&/,$_);
1737: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1738: if ($pr{'cr:s'}=~/$crole\&/) {
1739: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1740: return "refused:s:$crole&$cqual";
1741: }
1742: }
1743: }
1744: foreach (split('/',$domrole)) {
1745: my ($crole,$cqual)=split(/\&/,$_);
1746: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1747: if ($pr{'cr:d'}=~/$crole\&/) {
1748: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1749: return "refused:d:$crole&$cqual";
1750: }
1751: }
1752: }
1753: foreach (split('/',$courole)) {
1754: my ($crole,$cqual)=split(/\&/,$_);
1755: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1756: if ($pr{'cr:c'}=~/$crole\&/) {
1757: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1758: return "refused:c:$crole&$cqual";
1759: }
1760: }
1761: }
1762: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1763: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1764: "rolesdef_$rolename=".
1765: escape($sysrole.'_'.$domrole.'_'.$courole);
1766: return reply($command,$ENV{'user.home'});
1767: } else {
1768: return 'refused';
1769: }
1770: }
1771:
1772: # ---------------- Make a metadata query against the network of library servers
1773:
1774: sub metadata_query {
1775: my ($query,$custom,$customshow)=@_;
1776: my %rhash;
1777: for my $server (keys %libserv) {
1778: unless ($custom or $customshow) {
1779: my $reply=&reply("querysend:".&escape($query),$server);
1780: $rhash{$server}=$reply;
1781: }
1782: else {
1783: my $reply=&reply("querysend:".&escape($query).':'.
1784: &escape($custom).':'.&escape($customshow),
1785: $server);
1786: $rhash{$server}=$reply;
1787: }
1788: }
1789: return \%rhash;
1790: }
1791:
1792: # ------------------------------------------------------------------ Plain Text
1793:
1794: sub plaintext {
1795: my $short=shift;
1796: return $prp{$short};
1797: }
1798:
1799: # ----------------------------------------------------------------- Assign Role
1800:
1801: sub assignrole {
1802: my ($udom,$uname,$url,$role,$end,$start)=@_;
1803: my $mrole;
1804: if ($role =~ /^cr\//) {
1805: unless (&allowed('ccr',$url)) {
1806: &logthis('Refused custom assignrole: '.
1807: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1808: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1809: return 'refused';
1810: }
1811: $mrole='cr';
1812: } else {
1813: my $cwosec=$url;
1814: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1815: unless (&allowed('c'.$role,$cwosec)) {
1816: &logthis('Refused assignrole: '.
1817: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1818: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1819: return 'refused';
1820: }
1821: $mrole=$role;
1822: }
1823: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1824: "$udom:$uname:$url".'_'."$mrole=$role";
1825: if ($end) { $command.='_'.$end; }
1826: if ($start) {
1827: if ($end) {
1828: $command.='_'.$start;
1829: } else {
1830: $command.='_0_'.$start;
1831: }
1832: }
1833: return &reply($command,&homeserver($uname,$udom));
1834: }
1835:
1836: # -------------------------------------------------- Modify user authentication
1837: # Overrides without validation
1838:
1839: sub modifyuserauth {
1840: my ($udom,$uname,$umode,$upass)=@_;
1841: my $uhome=&homeserver($uname,$udom);
1842: unless (&allowed('mau',$udom)) { return 'refused'; }
1843: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
1844: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
1845: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
1846: &escape($upass),$uhome);
1847: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
1848: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
1849: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
1850: &log($udom,,$uname,$uhome,
1851: 'Authentication changed by '.$ENV{'user.domain'}.', '.
1852: $ENV{'user.name'}.', '.$umode.
1853: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
1854: unless ($reply eq 'ok') {
1855: &logthis('Authentication mode error: '.$reply);
1856: return 'error: '.$reply;
1857: }
1858: return 'ok';
1859: }
1860:
1861: # --------------------------------------------------------------- Modify a user
1862:
1863: sub modifyuser {
1864: my ($udom, $uname, $uid,
1865: $umode, $upass, $first,
1866: $middle, $last, $gene,
1867: $forceid, $desiredhome)=@_;
1868: $udom=~s/\W//g;
1869: $uname=~s/\W//g;
1870: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1871: $umode.', '.$first.', '.$middle.', '.
1872: $last.', '.$gene.'(forceid: '.$forceid.')'.
1873: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
1874: ' desiredhome not specified').
1875: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
1876: my $uhome=&homeserver($uname,$udom);
1877: # ----------------------------------------------------------------- Create User
1878: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1879: my $unhome='';
1880: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
1881: $unhome = $desiredhome;
1882: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1883: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1884: } else { # load balancing routine for determining $unhome
1885: my $tryserver;
1886: my $loadm=10000000;
1887: foreach $tryserver (keys %libserv) {
1888: if ($hostdom{$tryserver} eq $udom) {
1889: my $answer=reply('load',$tryserver);
1890: if (($answer=~/\d+/) && ($answer<$loadm)) {
1891: $loadm=$answer;
1892: $unhome=$tryserver;
1893: }
1894: }
1895: }
1896: }
1897: if (($unhome eq '') || ($unhome eq 'no_host')) {
1898: return 'error: unable to find a home server for '.$uname.
1899: ' in domain '.$udom;
1900: }
1901: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1902: &escape($upass),$unhome);
1903: unless ($reply eq 'ok') {
1904: return 'error: '.$reply;
1905: }
1906: $uhome=&homeserver($uname,$udom);
1907: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1908: return 'error: verify home';
1909: }
1910: } # End of creation of new user
1911: # ---------------------------------------------------------------------- Add ID
1912: if ($uid) {
1913: $uid=~tr/A-Z/a-z/;
1914: my %uidhash=&idrget($udom,$uname);
1915: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
1916: && (!$forceid)) {
1917: unless ($uid eq $uidhash{$uname}) {
1918: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1919: }
1920: } else {
1921: &idput($udom,($uname => $uid));
1922: }
1923: }
1924: # -------------------------------------------------------------- Add names, etc
1925: my %names=&get('environment',
1926: ['firstname','middlename','lastname','generation'],
1927: $udom,$uname);
1928: if ($names{'firstname'} =~ m/^error:.*/) { %names=(); }
1929: if ($first) { $names{'firstname'} = $first; }
1930: if ($middle) { $names{'middlename'} = $middle; }
1931: if ($last) { $names{'lastname'} = $last; }
1932: if ($gene) { $names{'generation'} = $gene; }
1933: my $reply = &put('environment', \%names, $udom,$uname);
1934: if ($reply ne 'ok') { return 'error: '.$reply; }
1935: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1936: $umode.', '.$first.', '.$middle.', '.
1937: $last.', '.$gene.' by '.
1938: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1939: return 'ok';
1940: }
1941:
1942: # -------------------------------------------------------------- Modify student
1943:
1944: sub modifystudent {
1945: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1946: $end,$start,$forceid,$desiredhome)=@_;
1947: my $cid='';
1948: unless ($cid=$ENV{'request.course.id'}) {
1949: return 'not_in_class';
1950: }
1951: # --------------------------------------------------------------- Make the user
1952: my $reply=&modifyuser
1953: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
1954: $desiredhome);
1955: unless ($reply eq 'ok') { return $reply; }
1956: my $uhome=&homeserver($uname,$udom);
1957: if (($uhome eq '') || ($uhome eq 'no_host')) {
1958: return 'error: no such user';
1959: }
1960: # -------------------------------------------------- Add student to course list
1961: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1962: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1963: &escape($uname.':'.$udom).'='.
1964: &escape($end.':'.$start),
1965: $ENV{'course.'.$cid.'.home'});
1966: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1967: return 'error: '.$reply;
1968: }
1969: # ---------------------------------------------------- Add student role to user
1970: my $uurl='/'.$cid;
1971: $uurl=~s/\_/\//g;
1972: if ($usec) {
1973: $uurl.='/'.$usec;
1974: }
1975: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1976: }
1977:
1978: # ------------------------------------------------- Write to course preferences
1979:
1980: sub writecoursepref {
1981: my ($courseid,%prefs)=@_;
1982: $courseid=~s/^\///;
1983: $courseid=~s/\_/\//g;
1984: my ($cdomain,$cnum)=split(/\//,$courseid);
1985: my $chome=homeserver($cnum,$cdomain);
1986: if (($chome eq '') || ($chome eq 'no_host')) {
1987: return 'error: no such course';
1988: }
1989: my $cstring='';
1990: foreach (keys %prefs) {
1991: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1992: }
1993: $cstring=~s/\&$//;
1994: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1995: }
1996:
1997: # ---------------------------------------------------------- Make/modify course
1998:
1999: sub createcourse {
2000: my ($udom,$description,$url)=@_;
2001: $url=&declutter($url);
2002: my $cid='';
2003: unless (&allowed('ccc',$ENV{'user.domain'})) {
2004: return 'refused';
2005: }
2006: unless ($udom eq $ENV{'user.domain'}) {
2007: return 'refused';
2008: }
2009: # ------------------------------------------------------------------- Create ID
2010: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2011: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2012: # ----------------------------------------------- Make sure that does not exist
2013: my $uhome=&homeserver($uname,$udom);
2014: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2015: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2016: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2017: $uhome=&homeserver($uname,$udom);
2018: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2019: return 'error: unable to generate unique course-ID';
2020: }
2021: }
2022: # ------------------------------------------------------------- Make the course
2023: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2024: $ENV{'user.home'});
2025: unless ($reply eq 'ok') { return 'error: '.$reply; }
2026: $uhome=&homeserver($uname,$udom);
2027: if (($uhome eq '') || ($uhome eq 'no_host')) {
2028: return 'error: no such course';
2029: }
2030: &writecoursepref($udom.'_'.$uname,
2031: ('description' => $description,
2032: 'url' => $url));
2033: return '/'.$udom.'/'.$uname;
2034: }
2035:
2036: # ---------------------------------------------------------- Assign Custom Role
2037:
2038: sub assigncustomrole {
2039: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2040: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2041: $end,$start);
2042: }
2043:
2044: # ----------------------------------------------------------------- Revoke Role
2045:
2046: sub revokerole {
2047: my ($udom,$uname,$url,$role)=@_;
2048: my $now=time;
2049: return &assignrole($udom,$uname,$url,$role,$now);
2050: }
2051:
2052: # ---------------------------------------------------------- Revoke Custom Role
2053:
2054: sub revokecustomrole {
2055: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2056: my $now=time;
2057: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2058: }
2059:
2060: # ------------------------------------------------------------ Directory lister
2061:
2062: sub dirlist {
2063: my $uri=shift;
2064: $uri=~s/^\///;
2065: $uri=~s/\/$//;
2066: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
2067: if ($udom) {
2068: if ($uname) {
2069: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
2070: homeserver($uname,$udom));
2071: return split(/:/,$listing);
2072: } else {
2073: my $tryserver;
2074: my %allusers=();
2075: foreach $tryserver (keys %libserv) {
2076: if ($hostdom{$tryserver} eq $udom) {
2077: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
2078: $tryserver);
2079: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2080: && ($listing ne 'con_lost')) {
2081: foreach (split(/:/,$listing)) {
2082: my ($entry,@stat)=split(/&/,$_);
2083: $allusers{$entry}=1;
2084: }
2085: }
2086: }
2087: }
2088: my $alluserstr='';
2089: foreach (sort keys %allusers) {
2090: $alluserstr.=$_.'&user:';
2091: }
2092: $alluserstr=~s/:$//;
2093: return split(/:/,$alluserstr);
2094: }
2095: } else {
2096: my $tryserver;
2097: my %alldom=();
2098: foreach $tryserver (keys %libserv) {
2099: $alldom{$hostdom{$tryserver}}=1;
2100: }
2101: my $alldomstr='';
2102: foreach (sort keys %alldom) {
2103: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2104: }
2105: $alldomstr=~s/:$//;
2106: return split(/:/,$alldomstr);
2107: }
2108: }
2109:
2110: # -------------------------------------------------------- Value of a Condition
2111:
2112: sub directcondval {
2113: my $number=shift;
2114: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2115: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2116: } else {
2117: return 2;
2118: }
2119: }
2120:
2121: sub condval {
2122: my $condidx=shift;
2123: my $result=0;
2124: my $allpathcond='';
2125: foreach (split(/\|/,$condidx)) {
2126: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2127: $allpathcond.=
2128: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2129: }
2130: }
2131: $allpathcond=~s/\|$//;
2132: if ($ENV{'request.course.id'}) {
2133: if ($allpathcond) {
2134: my $operand='|';
2135: my @stack;
2136: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
2137: if ($_ eq '(') {
2138: push @stack,($operand,$result)
2139: } elsif ($_ eq ')') {
2140: my $before=pop @stack;
2141: if (pop @stack eq '&') {
2142: $result=$result>$before?$before:$result;
2143: } else {
2144: $result=$result>$before?$result:$before;
2145: }
2146: } elsif (($_ eq '&') || ($_ eq '|')) {
2147: $operand=$_;
2148: } else {
2149: my $new=directcondval($_);
2150: if ($operand eq '&') {
2151: $result=$result>$new?$new:$result;
2152: } else {
2153: $result=$result>$new?$result:$new;
2154: }
2155: }
2156: }
2157: }
2158: }
2159: return $result;
2160: }
2161:
2162: # --------------------------------------------------- Course Resourcedata Query
2163:
2164: sub courseresdata {
2165: my ($coursenum,$coursedomain,@which)=@_;
2166: my $coursehom=&homeserver($coursenum,$coursedomain);
2167: my $hashid=$coursenum.':'.$coursedomain;
2168: unless (defined($courseresdatacache{$hashid.'.time'})) {
2169: unless (time-$courseresdatacache{$hashid.'.time'}<300) {
2170: my $coursehom=&homeserver($coursenum,$coursedomain);
2171: if ($coursehom) {
2172: my $dumpreply=&reply('dump:'.$coursedomain.':'.$coursenum.
2173: ':resourcedata:.',$coursehom);
2174: unless ($dumpreply=~/^error\:/) {
2175: $courseresdatacache{$hashid.'.time'}=time;
2176: $courseresdatacache{$hashid}=$dumpreply;
2177: }
2178: }
2179: }
2180: }
2181: my @pairs=split(/\&/,$courseresdatacache{$hashid});
2182: my %returnhash=();
2183: foreach (@pairs) {
2184: my ($key,$value)=split(/=/,$_);
2185: $returnhash{unescape($key)}=unescape($value);
2186: }
2187: my $item;
2188: foreach $item (@which) {
2189: if ($returnhash{$item}) { return $returnhash{$item}; }
2190: }
2191: return '';
2192: }
2193:
2194: # --------------------------------------------------------- Value of a Variable
2195:
2196: sub EXT {
2197: my ($varname,$symbparm)=@_;
2198: unless ($varname) { return ''; }
2199: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2200: my $rest;
2201: if ($therest[0]) {
2202: $rest=join('.',@therest);
2203: } else {
2204: $rest='';
2205: }
2206: my $qualifierrest=$qualifier;
2207: if ($rest) { $qualifierrest.='.'.$rest; }
2208: my $spacequalifierrest=$space;
2209: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2210: if ($realm eq 'user') {
2211: # --------------------------------------------------------------- user.resource
2212: if ($space eq 'resource') {
2213: my %restored=&restore();
2214: return $restored{$qualifierrest};
2215: # ----------------------------------------------------------------- user.access
2216: } elsif ($space eq 'access') {
2217: return &allowed($qualifier,$rest);
2218: # ------------------------------------------ user.preferences, user.environment
2219: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2220: return $ENV{join('.',('environment',$qualifierrest))};
2221: # ----------------------------------------------------------------- user.course
2222: } elsif ($space eq 'course') {
2223: return $ENV{join('.',('request.course',$qualifier))};
2224: # ------------------------------------------------------------------- user.role
2225: } elsif ($space eq 'role') {
2226: my ($role,$where)=split(/\./,$ENV{'request.role'});
2227: if ($qualifier eq 'value') {
2228: return $role;
2229: } elsif ($qualifier eq 'extent') {
2230: return $where;
2231: }
2232: # ----------------------------------------------------------------- user.domain
2233: } elsif ($space eq 'domain') {
2234: return $ENV{'user.domain'};
2235: # ------------------------------------------------------------------- user.name
2236: } elsif ($space eq 'name') {
2237: return $ENV{'user.name'};
2238: # ---------------------------------------------------- Any other user namespace
2239: } else {
2240: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2241: my %reply=&get($space,[$item]);
2242: return $reply{$item};
2243: }
2244: } elsif ($realm eq 'request') {
2245: # ------------------------------------------------------------- request.browser
2246: if ($space eq 'browser') {
2247: return $ENV{'browser.'.$qualifier};
2248: # ------------------------------------------------------------ request.filename
2249: } else {
2250: return $ENV{'request.'.$spacequalifierrest};
2251: }
2252: } elsif ($realm eq 'course') {
2253: # ---------------------------------------------------------- course.description
2254: return $ENV{'course.'.$ENV{'request.course.id'}.'.'.
2255: $spacequalifierrest};
2256: } elsif ($realm eq 'resource') {
2257: if ($ENV{'request.course.id'}) {
2258:
2259: # print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2260:
2261:
2262: # ----------------------------------------------------- Cascading lookup scheme
2263: my $symbp;
2264: if ($symbparm) {
2265: $symbp=$symbparm;
2266: } else {
2267: $symbp=&symbread();
2268: }
2269: my $mapp=(split(/\_\_\_/,$symbp))[0];
2270:
2271: my $symbparm=$symbp.'.'.$spacequalifierrest;
2272: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2273:
2274: my $seclevel=
2275: $ENV{'request.course.id'}.'.['.
2276: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
2277: my $seclevelr=
2278: $ENV{'request.course.id'}.'.['.
2279: $ENV{'request.course.sec'}.'].'.$symbparm;
2280: my $seclevelm=
2281: $ENV{'request.course.id'}.'.['.
2282: $ENV{'request.course.sec'}.'].'.$mapparm;
2283:
2284: my $courselevel=
2285: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
2286: my $courselevelr=
2287: $ENV{'request.course.id'}.'.'.$symbparm;
2288: my $courselevelm=
2289: $ENV{'request.course.id'}.'.'.$mapparm;
2290:
2291: # ----------------------------------------------------------- first, check user
2292: my %resourcedata=get('resourcedata',
2293: [$courselevelr,$courselevelm,$courselevel]);
2294: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2295: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2296:
2297: if ($resourcedata{$courselevelr}) {
2298: return $resourcedata{$courselevelr}; }
2299: if ($resourcedata{$courselevelm}) {
2300: return $resourcedata{$courselevelm}; }
2301: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
2302:
2303: } else {
2304: if ($resourcedata{$courselevelr}!~/No such file/) {
2305: &logthis("<font color=blue>WARNING:".
2306: " Trying to get resource data for ".$ENV{'user.name'}." at "
2307: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
2308: "</font>");
2309: }
2310: }
2311:
2312: # -------------------------------------------------------- second, check course
2313:
2314: my $coursereply=&courseresdata(
2315: $ENV{'course.'.$ENV{'request.course.id'}.'.num'},
2316: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
2317: ($seclevelr,$seclevelm,$seclevel,
2318: $courselevelr,$courselevelm,$courselevel));
2319: if ($coursereply) { return $coursereply; }
2320:
2321: # ------------------------------------------------------ third, check map parms
2322: my %parmhash=();
2323: my $thisparm='';
2324: if (tie(%parmhash,'GDBM_File',
2325: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
2326: $thisparm=$parmhash{$symbparm};
2327: untie(%parmhash);
2328: }
2329: if ($thisparm) { return $thisparm; }
2330: }
2331:
2332: # --------------------------------------------- last, look in resource metadata
2333:
2334: $spacequalifierrest=~s/\./\_/;
2335: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2336: if ($metadata) { return $metadata; }
2337: $metadata=&metadata($ENV{'request.filename'},
2338: 'parameter_'.$spacequalifierrest);
2339: if ($metadata) { return $metadata; }
2340:
2341: # ------------------------------------------------------------------ Cascade up
2342:
2343: unless ($space eq '0') {
2344: my ($part,$id)=split(/\_/,$space);
2345: if ($id) {
2346: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2347: $symbparm);
2348: if ($partgeneral) { return $partgeneral; }
2349: } else {
2350: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2351: $symbparm);
2352: if ($resourcegeneral) { return $resourcegeneral; }
2353: }
2354: }
2355:
2356: # ---------------------------------------------------- Any other user namespace
2357: } elsif ($realm eq 'environment') {
2358: # ----------------------------------------------------------------- environment
2359: return $ENV{'environment.'.$spacequalifierrest};
2360: } elsif ($realm eq 'system') {
2361: # ----------------------------------------------------------------- system.time
2362: if ($space eq 'time') {
2363: return time;
2364: }
2365: }
2366: return '';
2367: }
2368:
2369: # ---------------------------------------------------------------- Get metadata
2370:
2371: sub metadata {
2372: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
2373:
2374: $uri=&declutter($uri);
2375: my $filename=$uri;
2376: $uri=~s/\.meta$//;
2377: #
2378: # Is the metadata already cached?
2379: # Look at timestamp of caching
2380: # Everything is cached by the main uri, libraries are never directly cached
2381: #
2382: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
2383: #
2384: # Is this a recursive call for a library?
2385: #
2386: if ($liburi) {
2387: $liburi=&declutter($liburi);
2388: $filename=$liburi;
2389: }
2390: my %metathesekeys=();
2391: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2392: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2393: my $parser=HTML::LCParser->new(\$metastring);
2394: my $token;
2395: undef %metathesekeys;
2396: while ($token=$parser->get_token) {
2397: if ($token->[0] eq 'S') {
2398: if (defined($token->[2]->{'package'})) {
2399: #
2400: # This is a package - get package info
2401: #
2402: my $package=$token->[2]->{'package'};
2403: my $keyroot='';
2404: if ($prefix) {
2405: $keyroot.='_'.$prefix;
2406: } else {
2407: if (defined($token->[2]->{'part'})) {
2408: $keyroot.='_'.$token->[2]->{'part'};
2409: }
2410: }
2411: if (defined($token->[2]->{'id'})) {
2412: $keyroot.='_'.$token->[2]->{'id'};
2413: }
2414: if ($metacache{$uri.':packages'}) {
2415: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2416: } else {
2417: $metacache{$uri.':packages'}=$package.$keyroot;
2418: }
2419: foreach (keys %packagetab) {
2420: if ($_=~/^$package\&/) {
2421: my ($pack,$name,$subp)=split(/\&/,$_);
2422: my $value=$packagetab{$_};
2423: my $part=$keyroot;
2424: $part=~s/^\_//;
2425: if ($subp eq 'display') {
2426: $value.=' [Part: '.$part.']';
2427: }
2428: my $unikey='parameter'.$keyroot.'_'.$name;
2429: $metathesekeys{$unikey}=1;
2430: $metacache{$uri.':'.$unikey.'.part'}=$part;
2431: unless
2432: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2433: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2434: }
2435: }
2436: }
2437: } else {
2438: #
2439: # This is not a package - some other kind of start tag
2440: #
2441: my $entry=$token->[1];
2442: my $unikey;
2443: if ($entry eq 'import') {
2444: $unikey='';
2445: } else {
2446: $unikey=$entry;
2447: }
2448: if ($prefix) {
2449: $unikey.=$prefix;
2450: } else {
2451: if (defined($token->[2]->{'part'})) {
2452: $unikey.='_'.$token->[2]->{'part'};
2453: }
2454: }
2455: if (defined($token->[2]->{'id'})) {
2456: $unikey.='_'.$token->[2]->{'id'};
2457: }
2458:
2459: if ($entry eq 'import') {
2460: #
2461: # Importing a library here
2462: #
2463: if (defined($depthcount)) { $depthcount++; } else
2464: { $depthcount=0; }
2465: if ($depthcount<20) {
2466: foreach (split(/\,/,&metadata($uri,'keys',
2467: $parser->get_text('/import'),$unikey,
2468: $depthcount))) {
2469: $metathesekeys{$_}=1;
2470: }
2471: }
2472: } else {
2473:
2474: if (defined($token->[2]->{'name'})) {
2475: $unikey.='_'.$token->[2]->{'name'};
2476: }
2477: $metathesekeys{$unikey}=1;
2478: foreach (@{$token->[3]}) {
2479: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2480: }
2481: unless (
2482: $metacache{$uri.':'.$unikey}=&HTML::Entities::decode($parser->get_text('/'.$entry))
2483: ) { $metacache{$uri.':'.$unikey}=
2484: $metacache{$uri.':'.$unikey.'.default'};
2485: }
2486: # end of not-a-package not-a-library import
2487: }
2488: # end of not-a-package start tag
2489: }
2490: # the next is the end of "start tag"
2491: }
2492: }
2493: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2494: $metacache{$uri.':cachedtimestamp'}=time;
2495: # this is the end of "was not already recently cached
2496: }
2497: return $metacache{$uri.':'.$what};
2498: }
2499:
2500: # ------------------------------------------------- Update symbolic store links
2501:
2502: sub symblist {
2503: my ($mapname,%newhash)=@_;
2504: $mapname=declutter($mapname);
2505: my %hash;
2506: if (($ENV{'request.course.fn'}) && (%newhash)) {
2507: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2508: &GDBM_WRCREAT,0640)) {
2509: foreach (keys %newhash) {
2510: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2511: }
2512: if (untie(%hash)) {
2513: return 'ok';
2514: }
2515: }
2516: }
2517: return 'error';
2518: }
2519:
2520: # --------------------------------------------------------------- Clean-up symb
2521:
2522: sub symbclean {
2523: my $symb=shift;
2524: # remove version from map
2525: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
2526: # remove version from URL
2527: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
2528: return $symb;
2529: }
2530:
2531: # ------------------------------------------------------ Return symb list entry
2532:
2533: sub symbread {
2534: my $thisfn=shift;
2535: unless ($thisfn) {
2536: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
2537: $thisfn=$ENV{'request.filename'};
2538: }
2539: $thisfn=declutter($thisfn);
2540: my %hash;
2541: my %bighash;
2542: my $syval='';
2543: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2544: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2545: &GDBM_READER,0640)) {
2546: $syval=$hash{$thisfn};
2547: untie(%hash);
2548: }
2549: # ---------------------------------------------------------- There was an entry
2550: if ($syval) {
2551: unless ($syval=~/\_\d+$/) {
2552: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2553: &appenv('request.ambiguous' => $thisfn);
2554: return '';
2555: }
2556: $syval.=$1;
2557: }
2558: } else {
2559: # ------------------------------------------------------- Was not in symb table
2560: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2561: &GDBM_READER,0640)) {
2562: # ---------------------------------------------- Get ID(s) for current resource
2563: my $ids=$bighash{'ids_/res/'.$thisfn};
2564: unless ($ids) {
2565: $ids=$bighash{'ids_/'.$thisfn};
2566: }
2567: if ($ids) {
2568: # ------------------------------------------------------------------- Has ID(s)
2569: my @possibilities=split(/\,/,$ids);
2570: if ($#possibilities==0) {
2571: # ----------------------------------------------- There is only one possibility
2572: my ($mapid,$resid)=split(/\./,$ids);
2573: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2574: } else {
2575: # ------------------------------------------ There is more than one possibility
2576: my $realpossible=0;
2577: foreach (@possibilities) {
2578: my $file=$bighash{'src_'.$_};
2579: if (&allowed('bre',$file)) {
2580: my ($mapid,$resid)=split(/\./,$_);
2581: if ($bighash{'map_type_'.$mapid} ne 'page') {
2582: $realpossible++;
2583: $syval=declutter($bighash{'map_id_'.$mapid}).
2584: '___'.$resid;
2585: }
2586: }
2587: }
2588: if ($realpossible!=1) { $syval=''; }
2589: }
2590: }
2591: untie(%bighash)
2592: }
2593: }
2594: if ($syval) {
2595: return &symbclean($syval.'___'.$thisfn);
2596: }
2597: }
2598: &appenv('request.ambiguous' => $thisfn);
2599: return '';
2600: }
2601:
2602: # ---------------------------------------------------------- Return random seed
2603:
2604: sub numval {
2605: my $txt=shift;
2606: $txt=~tr/A-J/0-9/;
2607: $txt=~tr/a-j/0-9/;
2608: $txt=~tr/K-T/0-9/;
2609: $txt=~tr/k-t/0-9/;
2610: $txt=~tr/U-Z/0-5/;
2611: $txt=~tr/u-z/0-5/;
2612: $txt=~s/\D//g;
2613: return int($txt);
2614: }
2615:
2616: sub rndseed {
2617: my ($symb,$courseid,$domain,$username)=@_;
2618: if (!$symb) {
2619: unless ($symb=&symbread()) { return time; }
2620: }
2621: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2622: if (!$domain) {$domain=$ENV{'user.domain'};}
2623: if (!$username) {$username=$ENV{'user.name'};}
2624: {
2625: use integer;
2626: my $symbchck=unpack("%32C*",$symb) << 27;
2627: my $symbseed=numval($symb) << 22;
2628: my $namechck=unpack("%32C*",$username) << 17;
2629: my $nameseed=numval($username) << 12;
2630: my $domainseed=unpack("%32C*",$domain) << 7;
2631: my $courseseed=unpack("%32C*",$courseid);
2632: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2633: #uncommenting these lines can break things!
2634: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2635: #&Apache::lonxml::debug("rndseed :$num:$symb");
2636: return $num;
2637: }
2638: }
2639:
2640: sub ireceipt {
2641: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2642: my $cuname=unpack("%32C*",$funame);
2643: my $cudom=unpack("%32C*",$fudom);
2644: my $cucourseid=unpack("%32C*",$fucourseid);
2645: my $cusymb=unpack("%32C*",$fusymb);
2646: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2647: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2648: ($cunique%$cuname+
2649: $cunique%$cudom+
2650: $cusymb%$cuname+
2651: $cusymb%$cudom+
2652: $cucourseid%$cuname+
2653: $cucourseid%$cudom);
2654: }
2655:
2656: sub receipt {
2657: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2658: $ENV{'request.course.id'},&symbread());
2659: }
2660:
2661: # ------------------------------------------------------------ Serves up a file
2662: # returns either the contents of the file or a -1
2663: sub getfile {
2664: my $file=shift;
2665: &repcopy($file);
2666: if (! -e $file ) { return -1; };
2667: my $fh=Apache::File->new($file);
2668: my $a='';
2669: while (<$fh>) { $a .=$_; }
2670: return $a
2671: }
2672:
2673: sub filelocation {
2674: my ($dir,$file) = @_;
2675: my $location;
2676: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2677: if ($file=~m:^/~:) { # is a contruction space reference
2678: $location = $file;
2679: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2680: } else {
2681: $file=~s/^$perlvar{'lonDocRoot'}//;
2682: $file=~s:^/*res::;
2683: if ( !( $file =~ m:^/:) ) {
2684: $location = $dir. '/'.$file;
2685: } else {
2686: $location = '/home/httpd/html/res'.$file;
2687: }
2688: }
2689: $location=~s://+:/:g; # remove duplicate /
2690: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2691: return $location;
2692: }
2693:
2694: sub hreflocation {
2695: my ($dir,$file)=@_;
2696: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
2697: my $finalpath=filelocation($dir,$file);
2698: $finalpath=~s/^\/home\/httpd\/html//;
2699: return $finalpath;
2700: } else {
2701: return $file;
2702: }
2703: }
2704:
2705: # ------------------------------------------------------------- Declutters URLs
2706:
2707: sub declutter {
2708: my $thisfn=shift;
2709: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2710: $thisfn=~s/^\///;
2711: $thisfn=~s/^res\///;
2712: return $thisfn;
2713: }
2714:
2715: # -------------------------------------------------------- Escape Special Chars
2716:
2717: sub escape {
2718: my $str=shift;
2719: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2720: return $str;
2721: }
2722:
2723: # ----------------------------------------------------- Un-Escape Special Chars
2724:
2725: sub unescape {
2726: my $str=shift;
2727: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2728: return $str;
2729: }
2730:
2731: # ================================================================ Main Program
2732:
2733: sub goodbye {
2734: &logthis("Starting Shut down");
2735: &flushcourselogs();
2736: &logthis("Shutting down");
2737: }
2738:
2739: BEGIN {
2740: # ------------------------------------------------------------ Read access.conf
2741: unless ($readit) {
2742: {
2743: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2744:
2745: while (my $configline=<$config>) {
2746: if ($configline =~ /PerlSetVar/) {
2747: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2748: chomp($varvalue);
2749: $perlvar{$varname}=$varvalue;
2750: }
2751: }
2752: }
2753:
2754: # ------------------------------------------------------------- Read hosts file
2755: {
2756: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2757:
2758: while (my $configline=<$config>) {
2759: chomp($configline);
2760: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2761: $hostname{$id}=$name;
2762: $hostdom{$id}=$domain;
2763: $hostip{$id}=$ip;
2764: if ($role eq 'library') { $libserv{$id}=$name; }
2765: }
2766: }
2767:
2768: # ------------------------------------------------------ Read spare server file
2769: {
2770: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2771:
2772: while (my $configline=<$config>) {
2773: chomp($configline);
2774: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2775: $spareid{$configline}=1;
2776: }
2777: }
2778: }
2779: # ------------------------------------------------------------ Read permissions
2780: {
2781: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2782:
2783: while (my $configline=<$config>) {
2784: chomp($configline);
2785: if ($configline) {
2786: my ($role,$perm)=split(/ /,$configline);
2787: if ($perm ne '') { $pr{$role}=$perm; }
2788: }
2789: }
2790: }
2791:
2792: # -------------------------------------------- Read plain texts for permissions
2793: {
2794: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2795:
2796: while (my $configline=<$config>) {
2797: chomp($configline);
2798: if ($configline) {
2799: my ($short,$plain)=split(/:/,$configline);
2800: if ($plain ne '') { $prp{$short}=$plain; }
2801: }
2802: }
2803: }
2804:
2805: # ---------------------------------------------------------- Read package table
2806: {
2807: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
2808:
2809: while (my $configline=<$config>) {
2810: chomp($configline);
2811: my ($short,$plain)=split(/:/,$configline);
2812: my ($pack,$name)=split(/\&/,$short);
2813: if ($plain ne '') {
2814: $packagetab{$pack.'&'.$name.'&name'}=$name;
2815: $packagetab{$short}=$plain;
2816: }
2817: }
2818: }
2819:
2820: %metacache=();
2821:
2822: $processmarker=$$.'_'.time.'_'.$perlvar{'lonHostID'};
2823: $dumpcount=0;
2824:
2825: &logtouch();
2826: &logthis('<font color=yellow>INFO: Read configuration</font>');
2827: $readit=1;
2828: }
2829: }
2830:
2831: 1;
2832: __END__
2833:
2834: =head1 NAME
2835:
2836: Apache::lonnet - TCP networking package
2837:
2838: =head1 SYNOPSIS
2839:
2840: Invoked by other LON-CAPA modules.
2841:
2842: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
2843:
2844: =head1 INTRODUCTION
2845:
2846: This module provides subroutines which interact with the
2847: lonc/lond (TCP) network layer of LON-CAPA.
2848:
2849: This is part of the LearningOnline Network with CAPA project
2850: described at http://www.lon-capa.org.
2851:
2852: =head1 HANDLER SUBROUTINE
2853:
2854: There is no handler routine for this module.
2855:
2856: =head1 OTHER SUBROUTINES
2857:
2858: =over 4
2859:
2860: =item *
2861:
2862: logtouch() : make sure the logfile, lonnet.log, exists
2863:
2864: =item *
2865:
2866: logthis() : append message to lonnet.log
2867:
2868: =item *
2869:
2870: logperm() : append a permanent message to lonnet.perm.log
2871:
2872: =item *
2873:
2874: subreply() : non-critical communication, called by &reply
2875:
2876: =item *
2877:
2878: reply() : makes two attempts to pass message; logs refusals and rejections
2879:
2880: =item *
2881:
2882: reconlonc() : tries to reconnect lonc client processes.
2883:
2884: =item *
2885:
2886: critical() : passes a critical message to another server; if cannot get
2887: through then place message in connection buffer
2888:
2889: =item *
2890:
2891: appenv(%hash) : read in current user environment, append new environment
2892: values to make new user environment
2893:
2894: =item *
2895:
2896: delenv($varname) : read in current user environment, remove all values
2897: beginning with $varname, write new user environment (note: flock is used
2898: to prevent conflicting shared read/writes with file)
2899:
2900: =item *
2901:
2902: spareserver() : find server with least workload from spare.tab
2903:
2904: =item *
2905:
2906: queryauthenticate($uname,$udom) : try to determine user's current
2907: authentication scheme
2908:
2909: =item *
2910:
2911: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
2912: servers (first use the current one)
2913:
2914: =item *
2915:
2916: homeserver($uname,$udom) : find the homebase for a user from domain's lib
2917: servers
2918:
2919: =item *
2920:
2921: idget($udom,@ids) : find the usernames behind a list of IDs (returns hash:
2922: id=>name,id=>name)
2923:
2924: =item *
2925:
2926: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
2927: name=>id,name=>id)
2928:
2929: =item *
2930:
2931: idput($udom,%ids) : store away a list of names and associated IDs
2932:
2933: =item *
2934:
2935: usection($domain,$user,$courseid) : output of section name/number or '' for
2936: "not in course" and '-1' for "no section"
2937:
2938: =item *
2939:
2940: userenvironment($domain,$user,$what) : puts out any environment parameter
2941: for a user
2942:
2943: =item *
2944:
2945: subscribe($fname) : subscribe to a resource, return URL if possible
2946:
2947: =item *
2948:
2949: repcopy($filename) : replicate file
2950:
2951: =item *
2952:
2953: ssi($url,%hash) : server side include, does a complete request cycle on url to
2954: localhost, posts hash
2955:
2956: =item *
2957:
2958: log($domain,$name,$home,$message) : write to permanent log for user; use
2959: critical subroutine
2960:
2961: =item *
2962:
2963: flushcourselogs() : flush (save) buffer logs and access logs
2964:
2965: =item *
2966:
2967: courselog($what) : save message for course in hash
2968:
2969: =item *
2970:
2971: courseacclog($what) : save message for course using &courselog(). Perform
2972: special processing for specific resource types (problems, exams, quizzes, etc).
2973:
2974: =item *
2975:
2976: countacc($url) : count the number of accesses to a given URL
2977:
2978: =item *
2979:
2980: sub checkout($symb,$tuname,$tudom,$tcrsid) : check out an item
2981:
2982: =item *
2983:
2984: sub checkin($token) : check in an item
2985:
2986: =item *
2987:
2988: sub expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
2989:
2990: =item *
2991:
2992: devalidate($symb) : devalidate spreadsheets
2993:
2994: =item *
2995:
2996: hash2str(%hash) : convert a hash into a string complete with escaping and '='
2997: and '&' separators, supports elements that are arrayrefs and hashrefs
2998:
2999: =item *
3000:
3001: hashref2str($hashref) : convert a hashref into a string complete with
3002: escaping and '=' and '&' separators, supports elements that are
3003: arrayrefs and hashrefs
3004:
3005: =item *
3006:
3007: arrayref2str($arrayref) : convert an arrayref into a string complete
3008: with escaping and '&' separators, supports elements that are arrayrefs
3009: and hashrefs
3010:
3011: =item *
3012:
3013: str2hash($string) : convert string to hash using unescaping and
3014: splitting on '=' and '&', supports elements that are arrayrefs and
3015: hashrefs
3016:
3017: =item *
3018:
3019: str2array($string) : convert string to hash using unescaping and
3020: splitting on '&', supports elements that are arrayrefs and hashrefs
3021:
3022: =item *
3023:
3024: tmpreset($symb,$namespace,$domain,$stuname) : temporary storage
3025:
3026: =item *
3027:
3028: tmprestore($symb,$namespace,$domain,$stuname) : temporary restore
3029:
3030: =item *
3031:
3032: store($storehash,$symb,$namespace,$domain,$stuname) : stores hash permanently
3033: for this url; hashref needs to be given and should be a \%hashname; the
3034: remaining args aren't required and if they aren't passed or are '' they will
3035: be derived from the ENV
3036:
3037: =item *
3038:
3039: cstore($storehash,$symb,$namespace,$domain,$stuname) : same as store but
3040: uses critical subroutine
3041:
3042: =item *
3043:
3044: restore($symb,$namespace,$domain,$stuname) : returns hash for this symb;
3045: all args are optional
3046:
3047: =item *
3048:
3049: coursedescription($courseid) : course description
3050:
3051: =item *
3052:
3053: rolesinit($domain,$username,$authhost) : get user privileges
3054:
3055: =item *
3056:
3057: get($namespace,$storearr,$udomain,$uname) : returns hash with keys from array
3058: reference filled in from namesp ($udomain and $uname are optional)
3059:
3060: =item *
3061:
3062: del($namespace,$storearr,$udomain,$uname) : deletes keys out of array from
3063: namesp ($udomain and $uname are optional)
3064:
3065: =item *
3066:
3067: dump($namespace,$udomain,$uname,$regexp) :
3068: dumps the complete (or key matching regexp) namespace into a hash
3069: ($udomain, $uname and $regexp are optional)
3070:
3071: =item *
3072:
3073: put($namespace,$storehash,$udomain,$uname) : stores hash in namesp
3074: ($udomain and $uname are optional)
3075:
3076: =item *
3077:
3078: cput($namespace,$storehash,$udomain,$uname) : critical put
3079: ($udomain and $uname are optional)
3080:
3081: =item *
3082:
3083: eget($namespace,$storearr,$udomain,$uname) : returns hash with keys from array
3084: reference filled in from namesp (encrypts the return communication)
3085: ($udomain and $uname are optional)
3086:
3087: =item *
3088:
3089: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
3090: actions
3091: F: full access
3092: U,I,K: authentication modes (cxx only)
3093: '': forbidden
3094: 1: user needs to choose course
3095: 2: browse allowed
3096:
3097: =item *
3098:
3099: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
3100: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
3101: and course level
3102:
3103: =item *
3104:
3105: metadata_query($query,$custom,$customshow) : make a metadata query against the
3106: network of library servers; returns file handle of where SQL and regex results
3107: will be stored for query
3108:
3109: =item *
3110:
3111: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
3112: explanation of a user role term
3113:
3114: =item *
3115:
3116: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
3117: user for the level given by URL. Optional start and end dates (leave empty
3118: string or zero for "no date")
3119:
3120: =item *
3121:
3122: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
3123:
3124: =item *
3125:
3126: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
3127: modify user
3128:
3129: =item *
3130:
3131: modifystudent($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3132: $end,$start) : modify student
3133:
3134: =item *
3135:
3136: writecoursepref($courseid,%prefs) : write preferences for a course
3137:
3138: =item *
3139:
3140: createcourse($udom,$description,$url) : make/modify course
3141:
3142: =item *
3143:
3144: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
3145: custom role; give a custom role to a user for the level given by URL. Specify
3146: name and domain of role author, and role name
3147:
3148: =item *
3149:
3150: revokerole($udom,$uname,$url,$role) : revoke a role for url
3151:
3152: =item *
3153:
3154: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
3155:
3156: =item *
3157:
3158: dirlist($uri) : return directory list based on URI
3159:
3160: =item *
3161:
3162: directcondval($number) : get current value of a condition; reads from a state
3163: string
3164:
3165: =item *
3166:
3167: condval($condidx) : value of condition index based on state
3168:
3169: =item *
3170:
3171: EXT($varname,$symbparm) : value of a variable
3172:
3173: =item *
3174:
3175: metadata($uri,$what,$liburi,$prefix,$depthcount) : get metadata; returns the
3176: metadata entry for a file; entry='keys', returns a comma separated list of keys
3177:
3178: =item *
3179:
3180: symblist($mapname,%newhash) : update symbolic storage links
3181:
3182: =item *
3183:
3184: symbread($filename) : return symbolic list entry (filename argument optional);
3185: returns the data handle
3186:
3187: =item *
3188:
3189: numval($salt) : return random seed value (addend for rndseed)
3190:
3191: =item *
3192:
3193: rndseed($symb,$courseid,$domain,$username) : create a random sum; returns
3194: a random seed, all arguments are optional, if they aren't sent it uses the
3195: environment to derive them. Note: if symb isn't sent and it can't get one
3196: from &symbread it will use the current time as its return value
3197:
3198: =item *
3199:
3200: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
3201: unfakeable, receipt
3202:
3203: =item *
3204:
3205: receipt() : API to ireceipt working off of ENV values; given out to users
3206:
3207: =item *
3208:
3209: getfile($file) : serves up a file, returns the contents of a file or -1;
3210: replicates and subscribes to the file
3211:
3212: =item *
3213:
3214: filelocation($dir,$file) : returns file system location of a file based on URI;
3215: meant to be "fairly clean" absolute reference
3216:
3217: =item *
3218:
3219: hreflocation($dir,$file) : returns file system location or a URL; same as
3220: filelocation except for hrefs
3221:
3222: =item *
3223:
3224: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
3225:
3226: =item *
3227:
3228: escape() : unpack non-word characters into CGI-compatible hex codes
3229:
3230: =item *
3231:
3232: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
3233:
3234: =item *
3235:
3236: goodbye() : flush course logs and log shutting down; it is called in srm.conf
3237: as a PerlChildExitHandler
3238:
3239: =back
3240:
3241: =cut
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