1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.702 2006/01/21 08:27:02 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonnet;
31:
32: use strict;
33: use LWP::UserAgent();
34: use HTTP::Headers;
35: use HTTP::Date;
36: # use Date::Parse;
37: use vars
38: qw(%perlvar %hostname %badServerCache %iphost %spareid %hostdom
39: %libserv %pr %prp $memcache %packagetab
40: %courselogs %accesshash %userrolehash %domainrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf
42: %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati %domain_primary
44: $tmpdir $_64bit %env);
45:
46: use IO::Socket;
47: use GDBM_File;
48: use Apache::Constants qw(:common :http);
49: use HTML::LCParser;
50: use HTML::Parser;
51: use Fcntl qw(:flock);
52: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
53: use Time::HiRes qw( gettimeofday tv_interval );
54: use Cache::Memcached;
55: use Digest::MD5;
56:
57: my $readit;
58: my $max_connection_retries = 10; # Or some such value.
59:
60: require Exporter;
61:
62: our @ISA = qw (Exporter);
63: our @EXPORT = qw(%env);
64:
65: =pod
66:
67: =head1 Package Variables
68:
69: These are largely undocumented, so if you decipher one please note it here.
70:
71: =over 4
72:
73: =item $processmarker
74:
75: Contains the time this process was started and this servers host id.
76:
77: =item $dumpcount
78:
79: Counts the number of times a message log flush has been attempted (regardless
80: of success) by this process. Used as part of the filename when messages are
81: delayed.
82:
83: =back
84:
85: =cut
86:
87:
88: # --------------------------------------------------------------------- Logging
89:
90: sub logtouch {
91: my $execdir=$perlvar{'lonDaemons'};
92: unless (-e "$execdir/logs/lonnet.log") {
93: open(my $fh,">>$execdir/logs/lonnet.log");
94: close $fh;
95: }
96: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
97: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
98: }
99:
100: sub logthis {
101: my $message=shift;
102: my $execdir=$perlvar{'lonDaemons'};
103: my $now=time;
104: my $local=localtime($now);
105: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
106: print $fh "$local ($$): $message\n";
107: close($fh);
108: }
109: return 1;
110: }
111:
112: sub logperm {
113: my $message=shift;
114: my $execdir=$perlvar{'lonDaemons'};
115: my $now=time;
116: my $local=localtime($now);
117: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
118: print $fh "$now:$message:$local\n";
119: close($fh);
120: }
121: return 1;
122: }
123:
124: # -------------------------------------------------- Non-critical communication
125: sub subreply {
126: my ($cmd,$server)=@_;
127: my $peerfile="$perlvar{'lonSockDir'}/$server";
128: #
129: # With loncnew process trimming, there's a timing hole between lonc server
130: # process exit and the master server picking up the listen on the AF_UNIX
131: # socket. In that time interval, a lock file will exist:
132:
133: my $lockfile=$peerfile.".lock";
134: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
135: sleep(1);
136: }
137: # At this point, either a loncnew parent is listening or an old lonc
138: # or loncnew child is listening so we can connect or everything's dead.
139: #
140: # We'll give the connection a few tries before abandoning it. If
141: # connection is not possible, we'll con_lost back to the client.
142: #
143: my $client;
144: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
145: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
146: Type => SOCK_STREAM,
147: Timeout => 10);
148: if($client) {
149: last; # Connected!
150: }
151: sleep(1); # Try again later if failed connection.
152: }
153: my $answer;
154: if ($client) {
155: print $client "$cmd\n";
156: $answer=<$client>;
157: if (!$answer) { $answer="con_lost"; }
158: chomp($answer);
159: } else {
160: $answer = 'con_lost'; # Failed connection.
161: }
162: return $answer;
163: }
164:
165: sub reply {
166: my ($cmd,$server)=@_;
167: unless (defined($hostname{$server})) { return 'no_such_host'; }
168: my $answer=subreply($cmd,$server);
169: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
170: &logthis("<font color=\"blue\">WARNING:".
171: " $cmd to $server returned $answer</font>");
172: }
173: return $answer;
174: }
175:
176: # ----------------------------------------------------------- Send USR1 to lonc
177:
178: sub reconlonc {
179: my $peerfile=shift;
180: &logthis("Trying to reconnect for $peerfile");
181: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
182: if (open(my $fh,"<$loncfile")) {
183: my $loncpid=<$fh>;
184: chomp($loncpid);
185: if (kill 0 => $loncpid) {
186: &logthis("lonc at pid $loncpid responding, sending USR1");
187: kill USR1 => $loncpid;
188: sleep 1;
189: if (-e "$peerfile") { return; }
190: &logthis("$peerfile still not there, give it another try");
191: sleep 5;
192: if (-e "$peerfile") { return; }
193: &logthis(
194: "<font color=\"blue\">WARNING: $peerfile still not there, giving up</font>");
195: } else {
196: &logthis(
197: "<font color=\"blue\">WARNING:".
198: " lonc at pid $loncpid not responding, giving up</font>");
199: }
200: } else {
201: &logthis('<font color="blue">WARNING: lonc not running, giving up</font>');
202: }
203: }
204:
205: # ------------------------------------------------------ Critical communication
206:
207: sub critical {
208: my ($cmd,$server)=@_;
209: unless ($hostname{$server}) {
210: &logthis("<font color=\"blue\">WARNING:".
211: " Critical message to unknown server ($server)</font>");
212: return 'no_such_host';
213: }
214: my $answer=reply($cmd,$server);
215: if ($answer eq 'con_lost') {
216: &reconlonc("$perlvar{'lonSockDir'}/$server");
217: my $answer=reply($cmd,$server);
218: if ($answer eq 'con_lost') {
219: my $now=time;
220: my $middlename=$cmd;
221: $middlename=substr($middlename,0,16);
222: $middlename=~s/\W//g;
223: my $dfilename=
224: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
225: $dumpcount++;
226: {
227: my $dfh;
228: if (open($dfh,">$dfilename")) {
229: print $dfh "$cmd\n";
230: close($dfh);
231: }
232: }
233: sleep 2;
234: my $wcmd='';
235: {
236: my $dfh;
237: if (open($dfh,"<$dfilename")) {
238: $wcmd=<$dfh>;
239: close($dfh);
240: }
241: }
242: chomp($wcmd);
243: if ($wcmd eq $cmd) {
244: &logthis("<font color=\"blue\">WARNING: ".
245: "Connection buffer $dfilename: $cmd</font>");
246: &logperm("D:$server:$cmd");
247: return 'con_delayed';
248: } else {
249: &logthis("<font color=\"red\">CRITICAL:"
250: ." Critical connection failed: $server $cmd</font>");
251: &logperm("F:$server:$cmd");
252: return 'con_failed';
253: }
254: }
255: }
256: return $answer;
257: }
258:
259: # ------------------------------------------- Transfer profile into environment
260:
261: sub transfer_profile_to_env {
262: my ($lonidsdir,$handle)=@_;
263: my @profile;
264: {
265: open(my $idf,"$lonidsdir/$handle.id");
266: flock($idf,LOCK_SH);
267: @profile=<$idf>;
268: close($idf);
269: }
270: my $envi;
271: my %Remove;
272: for ($envi=0;$envi<=$#profile;$envi++) {
273: chomp($profile[$envi]);
274: my ($envname,$envvalue)=split(/=/,$profile[$envi],2);
275: $env{$envname} = $envvalue;
276: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
277: if ($time < time-300) {
278: $Remove{$key}++;
279: }
280: }
281: }
282: $env{'user.environment'} = "$lonidsdir/$handle.id";
283: foreach my $expired_key (keys(%Remove)) {
284: &delenv($expired_key);
285: }
286: }
287:
288: # ---------------------------------------------------------- Append Environment
289:
290: sub appenv {
291: my %newenv=@_;
292: foreach my $key (keys(%newenv)) {
293: if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
294: &logthis("<font color=\"blue\">WARNING: ".
295: "Attempt to modify environment ".$key." to ".$newenv{$key}
296: .'</font>');
297: delete($newenv{$key});
298: } else {
299: $env{$key}=$newenv{$key};
300: }
301: }
302:
303: my $lockfh;
304: unless (open($lockfh,"$env{'user.environment'}")) {
305: return 'error: '.$!;
306: }
307: unless (flock($lockfh,LOCK_EX)) {
308: &logthis("<font color=\"blue\">WARNING: ".
309: 'Could not obtain exclusive lock in appenv: '.$!);
310: close($lockfh);
311: return 'error: '.$!;
312: }
313:
314: my @oldenv;
315: {
316: my $fh;
317: unless (open($fh,"$env{'user.environment'}")) {
318: return 'error: '.$!;
319: }
320: @oldenv=<$fh>;
321: close($fh);
322: }
323: for (my $i=0; $i<=$#oldenv; $i++) {
324: chomp($oldenv[$i]);
325: if ($oldenv[$i] ne '') {
326: my ($name,$value)=split(/=/,$oldenv[$i],2);
327: unless (defined($newenv{$name})) {
328: $newenv{$name}=$value;
329: }
330: }
331: }
332: {
333: my $fh;
334: unless (open($fh,">$env{'user.environment'}")) {
335: return 'error';
336: }
337: my $newname;
338: foreach $newname (keys %newenv) {
339: print $fh "$newname=$newenv{$newname}\n";
340: }
341: close($fh);
342: }
343:
344: close($lockfh);
345: return 'ok';
346: }
347: # ----------------------------------------------------- Delete from Environment
348:
349: sub delenv {
350: my $delthis=shift;
351: my %newenv=();
352: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
353: &logthis("<font color=\"blue\">WARNING: ".
354: "Attempt to delete from environment ".$delthis);
355: return 'error';
356: }
357: my @oldenv;
358: {
359: my $fh;
360: unless (open($fh,"$env{'user.environment'}")) {
361: return 'error';
362: }
363: unless (flock($fh,LOCK_SH)) {
364: &logthis("<font color=\"blue\">WARNING: ".
365: 'Could not obtain shared lock in delenv: '.$!);
366: close($fh);
367: return 'error: '.$!;
368: }
369: @oldenv=<$fh>;
370: close($fh);
371: }
372: {
373: my $fh;
374: unless (open($fh,">$env{'user.environment'}")) {
375: return 'error';
376: }
377: unless (flock($fh,LOCK_EX)) {
378: &logthis("<font color=\"blue\">WARNING: ".
379: 'Could not obtain exclusive lock in delenv: '.$!);
380: close($fh);
381: return 'error: '.$!;
382: }
383: foreach my $cur_key (@oldenv) {
384: if ($cur_key=~/^$delthis/) {
385: my ($key,undef) = split('=',$cur_key,2);
386: delete($env{$key});
387: } else {
388: print $fh $cur_key;
389: }
390: }
391: close($fh);
392: }
393: return 'ok';
394: }
395:
396: # ------------------------------------------ Find out current server userload
397: # there is a copy in lond
398: sub userload {
399: my $numusers=0;
400: {
401: opendir(LONIDS,$perlvar{'lonIDsDir'});
402: my $filename;
403: my $curtime=time;
404: while ($filename=readdir(LONIDS)) {
405: if ($filename eq '.' || $filename eq '..') {next;}
406: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
407: if ($curtime-$mtime < 1800) { $numusers++; }
408: }
409: closedir(LONIDS);
410: }
411: my $userloadpercent=0;
412: my $maxuserload=$perlvar{'lonUserLoadLim'};
413: if ($maxuserload) {
414: $userloadpercent=100*$numusers/$maxuserload;
415: }
416: $userloadpercent=sprintf("%.2f",$userloadpercent);
417: return $userloadpercent;
418: }
419:
420: # ------------------------------------------ Fight off request when overloaded
421:
422: sub overloaderror {
423: my ($r,$checkserver)=@_;
424: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
425: my $loadavg;
426: if ($checkserver eq $perlvar{'lonHostID'}) {
427: open(my $loadfile,'/proc/loadavg');
428: $loadavg=<$loadfile>;
429: $loadavg =~ s/\s.*//g;
430: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
431: close($loadfile);
432: } else {
433: $loadavg=&reply('load',$checkserver);
434: }
435: my $overload=$loadavg-100;
436: if ($overload>0) {
437: $r->err_headers_out->{'Retry-After'}=$overload;
438: $r->log_error('Overload of '.$overload.' on '.$checkserver);
439: return 413;
440: }
441: return '';
442: }
443:
444: # ------------------------------ Find server with least workload from spare.tab
445:
446: sub spareserver {
447: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
448: my $tryserver;
449: my $spareserver='';
450: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
451: my $lowestserver=$loadpercent > $userloadpercent?
452: $loadpercent : $userloadpercent;
453: foreach $tryserver (keys(%spareid)) {
454: my $loadans=&reply('load',$tryserver);
455: my $userloadans=&reply('userload',$tryserver);
456: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
457: next; #didn't get a number from the server
458: }
459: my $answer;
460: if ($loadans =~ /\d/) {
461: if ($userloadans =~ /\d/) {
462: #both are numbers, pick the bigger one
463: $answer=$loadans > $userloadans?
464: $loadans : $userloadans;
465: } else {
466: $answer = $loadans;
467: }
468: } else {
469: $answer = $userloadans;
470: }
471: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
472: if ($want_server_name) {
473: $spareserver=$tryserver;
474: } else {
475: $spareserver="http://$hostname{$tryserver}";
476: }
477: $lowestserver=$answer;
478: }
479: }
480: return $spareserver;
481: }
482:
483: # --------------------------------------------- Try to change a user's password
484:
485: sub changepass {
486: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
487: $currentpass = &escape($currentpass);
488: $newpass = &escape($newpass);
489: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
490: $server);
491: if (! $answer) {
492: &logthis("No reply on password change request to $server ".
493: "by $uname in domain $udom.");
494: } elsif ($answer =~ "^ok") {
495: &logthis("$uname in $udom successfully changed their password ".
496: "on $server.");
497: } elsif ($answer =~ "^pwchange_failure") {
498: &logthis("$uname in $udom was unable to change their password ".
499: "on $server. The action was blocked by either lcpasswd ".
500: "or pwchange");
501: } elsif ($answer =~ "^non_authorized") {
502: &logthis("$uname in $udom did not get their password correct when ".
503: "attempting to change it on $server.");
504: } elsif ($answer =~ "^auth_mode_error") {
505: &logthis("$uname in $udom attempted to change their password despite ".
506: "not being locally or internally authenticated on $server.");
507: } elsif ($answer =~ "^unknown_user") {
508: &logthis("$uname in $udom attempted to change their password ".
509: "on $server but were unable to because $server is not ".
510: "their home server.");
511: } elsif ($answer =~ "^refused") {
512: &logthis("$server refused to change $uname in $udom password because ".
513: "it was sent an unencrypted request to change the password.");
514: }
515: return $answer;
516: }
517:
518: # ----------------------- Try to determine user's current authentication scheme
519:
520: sub queryauthenticate {
521: my ($uname,$udom)=@_;
522: my $uhome=&homeserver($uname,$udom);
523: if (!$uhome) {
524: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
525: return 'no_host';
526: }
527: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
528: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
529: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
530: }
531: return $answer;
532: }
533:
534: # --------- Try to authenticate user from domain's lib servers (first this one)
535:
536: sub authenticate {
537: my ($uname,$upass,$udom)=@_;
538: $upass=escape($upass);
539: $uname=~s/\W//g;
540: my $uhome=&homeserver($uname,$udom);
541: if (!$uhome) {
542: &logthis("User $uname at $udom is unknown in authenticate");
543: return 'no_host';
544: }
545: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
546: if ($answer eq 'authorized') {
547: &logthis("User $uname at $udom authorized by $uhome");
548: return $uhome;
549: }
550: if ($answer eq 'non_authorized') {
551: &logthis("User $uname at $udom rejected by $uhome");
552: return 'no_host';
553: }
554: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
555: return 'no_host';
556: }
557:
558: # ---------------------- Find the homebase for a user from domain's lib servers
559:
560: my %homecache;
561: sub homeserver {
562: my ($uname,$udom,$ignoreBadCache)=@_;
563: my $index="$uname:$udom";
564:
565: if (exists($homecache{$index})) { return $homecache{$index}; }
566: my $tryserver;
567: foreach $tryserver (keys %libserv) {
568: next if ($ignoreBadCache ne 'true' &&
569: exists($badServerCache{$tryserver}));
570: if ($hostdom{$tryserver} eq $udom) {
571: my $answer=reply("home:$udom:$uname",$tryserver);
572: if ($answer eq 'found') {
573: return $homecache{$index}=$tryserver;
574: } elsif ($answer eq 'no_host') {
575: $badServerCache{$tryserver}=1;
576: }
577: }
578: }
579: return 'no_host';
580: }
581:
582: # ------------------------------------- Find the usernames behind a list of IDs
583:
584: sub idget {
585: my ($udom,@ids)=@_;
586: my %returnhash=();
587:
588: my $tryserver;
589: foreach $tryserver (keys %libserv) {
590: if ($hostdom{$tryserver} eq $udom) {
591: my $idlist=join('&',@ids);
592: $idlist=~tr/A-Z/a-z/;
593: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
594: my @answer=();
595: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
596: @answer=split(/\&/,$reply);
597: } ;
598: my $i;
599: for ($i=0;$i<=$#ids;$i++) {
600: if ($answer[$i]) {
601: $returnhash{$ids[$i]}=$answer[$i];
602: }
603: }
604: }
605: }
606: return %returnhash;
607: }
608:
609: # ------------------------------------- Find the IDs behind a list of usernames
610:
611: sub idrget {
612: my ($udom,@unames)=@_;
613: my %returnhash=();
614: foreach (@unames) {
615: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
616: }
617: return %returnhash;
618: }
619:
620: # ------------------------------- Store away a list of names and associated IDs
621:
622: sub idput {
623: my ($udom,%ids)=@_;
624: my %servers=();
625: foreach (keys %ids) {
626: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
627: my $uhom=&homeserver($_,$udom);
628: if ($uhom ne 'no_host') {
629: my $id=&escape($ids{$_});
630: $id=~tr/A-Z/a-z/;
631: my $unam=&escape($_);
632: if ($servers{$uhom}) {
633: $servers{$uhom}.='&'.$id.'='.$unam;
634: } else {
635: $servers{$uhom}=$id.'='.$unam;
636: }
637: }
638: }
639: foreach (keys %servers) {
640: &critical('idput:'.$udom.':'.$servers{$_},$_);
641: }
642: }
643:
644: # --------------------------------------------------- Assign a key to a student
645:
646: sub assign_access_key {
647: #
648: # a valid key looks like uname:udom#comments
649: # comments are being appended
650: #
651: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
652: $kdom=
653: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
654: $knum=
655: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
656: $cdom=
657: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
658: $cnum=
659: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
660: $udom=$env{'user.name'} unless (defined($udom));
661: $uname=$env{'user.domain'} unless (defined($uname));
662: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
663: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
664: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
665: # assigned to this person
666: # - this should not happen,
667: # unless something went wrong
668: # the first time around
669: # ready to assign
670: $logentry=$1.'; '.$logentry;
671: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
672: $kdom,$knum) eq 'ok') {
673: # key now belongs to user
674: my $envkey='key.'.$cdom.'_'.$cnum;
675: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
676: &appenv('environment.'.$envkey => $ckey);
677: return 'ok';
678: } else {
679: return
680: 'error: Count not permanently assign key, will need to be re-entered later.';
681: }
682: } else {
683: return 'error: Could not assign key, try again later.';
684: }
685: } elsif (!$existing{$ckey}) {
686: # the key does not exist
687: return 'error: The key does not exist';
688: } else {
689: # the key is somebody else's
690: return 'error: The key is already in use';
691: }
692: }
693:
694: # ------------------------------------------ put an additional comment on a key
695:
696: sub comment_access_key {
697: #
698: # a valid key looks like uname:udom#comments
699: # comments are being appended
700: #
701: my ($ckey,$cdom,$cnum,$logentry)=@_;
702: $cdom=
703: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
704: $cnum=
705: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
706: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
707: if ($existing{$ckey}) {
708: $existing{$ckey}.='; '.$logentry;
709: # ready to assign
710: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
711: $cdom,$cnum) eq 'ok') {
712: return 'ok';
713: } else {
714: return 'error: Count not store comment.';
715: }
716: } else {
717: # the key does not exist
718: return 'error: The key does not exist';
719: }
720: }
721:
722: # ------------------------------------------------------ Generate a set of keys
723:
724: sub generate_access_keys {
725: my ($number,$cdom,$cnum,$logentry)=@_;
726: $cdom=
727: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
728: $cnum=
729: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
730: unless (&allowed('mky',$cdom)) { return 0; }
731: unless (($cdom) && ($cnum)) { return 0; }
732: if ($number>10000) { return 0; }
733: sleep(2); # make sure don't get same seed twice
734: srand(time()^($$+($$<<15))); # from "Programming Perl"
735: my $total=0;
736: for (my $i=1;$i<=$number;$i++) {
737: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
738: sprintf("%lx",int(100000*rand)).'-'.
739: sprintf("%lx",int(100000*rand));
740: $newkey=~s/1/g/g; # folks mix up 1 and l
741: $newkey=~s/0/h/g; # and also 0 and O
742: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
743: if ($existing{$newkey}) {
744: $i--;
745: } else {
746: if (&put('accesskeys',
747: { $newkey => '# generated '.localtime().
748: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
749: '; '.$logentry },
750: $cdom,$cnum) eq 'ok') {
751: $total++;
752: }
753: }
754: }
755: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
756: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
757: return $total;
758: }
759:
760: # ------------------------------------------------------- Validate an accesskey
761:
762: sub validate_access_key {
763: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
764: $cdom=
765: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
766: $cnum=
767: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
768: $udom=$env{'user.domain'} unless (defined($udom));
769: $uname=$env{'user.name'} unless (defined($uname));
770: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
771: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
772: }
773:
774: # ------------------------------------- Find the section of student in a course
775: sub devalidate_getsection_cache {
776: my ($udom,$unam,$courseid)=@_;
777: $courseid=~s/\_/\//g;
778: $courseid=~s/^(\w)/\/$1/;
779: my $hashid="$udom:$unam:$courseid";
780: &devalidate_cache_new('getsection',$hashid);
781: }
782:
783: sub getsection {
784: my ($udom,$unam,$courseid)=@_;
785: my $cachetime=1800;
786: $courseid=~s/\_/\//g;
787: $courseid=~s/^(\w)/\/$1/;
788:
789: my $hashid="$udom:$unam:$courseid";
790: my ($result,$cached)=&is_cached_new('getsection',$hashid);
791: if (defined($cached)) { return $result; }
792:
793: my %Pending;
794: my %Expired;
795: #
796: # Each role can either have not started yet (pending), be active,
797: # or have expired.
798: #
799: # If there is an active role, we are done.
800: #
801: # If there is more than one role which has not started yet,
802: # choose the one which will start sooner
803: # If there is one role which has not started yet, return it.
804: #
805: # If there is more than one expired role, choose the one which ended last.
806: # If there is a role which has expired, return it.
807: #
808: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
809: &homeserver($unam,$udom)))) {
810: my ($key,$value)=split(/\=/,$_);
811: $key=&unescape($key);
812: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
813: my $section=$1;
814: if ($key eq $courseid.'_st') { $section=''; }
815: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
816: my $now=time;
817: if (defined($end) && $end && ($now > $end)) {
818: $Expired{$end}=$section;
819: next;
820: }
821: if (defined($start) && $start && ($now < $start)) {
822: $Pending{$start}=$section;
823: next;
824: }
825: return &do_cache_new('getsection',$hashid,$section,$cachetime);
826: }
827: #
828: # Presumedly there will be few matching roles from the above
829: # loop and the sorting time will be negligible.
830: if (scalar(keys(%Pending))) {
831: my ($time) = sort {$a <=> $b} keys(%Pending);
832: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
833: }
834: if (scalar(keys(%Expired))) {
835: my @sorted = sort {$a <=> $b} keys(%Expired);
836: my $time = pop(@sorted);
837: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
838: }
839: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
840: }
841:
842: sub save_cache {
843: my ($r)=@_;
844: if (! $r->is_initial_req()) { return DECLINED; }
845: &purge_remembered();
846: undef(%env);
847: return OK;
848: }
849:
850: my $to_remember=-1;
851: my %remembered;
852: my %accessed;
853: my $kicks=0;
854: my $hits=0;
855: sub devalidate_cache_new {
856: my ($name,$id,$debug) = @_;
857: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
858: $id=&escape($name.':'.$id);
859: $memcache->delete($id);
860: delete($remembered{$id});
861: delete($accessed{$id});
862: }
863:
864: sub is_cached_new {
865: my ($name,$id,$debug) = @_;
866: $id=&escape($name.':'.$id);
867: if (exists($remembered{$id})) {
868: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
869: $accessed{$id}=[&gettimeofday()];
870: $hits++;
871: return ($remembered{$id},1);
872: }
873: my $value = $memcache->get($id);
874: if (!(defined($value))) {
875: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
876: return (undef,undef);
877: }
878: if ($value eq '__undef__') {
879: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
880: $value=undef;
881: }
882: &make_room($id,$value,$debug);
883: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
884: return ($value,1);
885: }
886:
887: sub do_cache_new {
888: my ($name,$id,$value,$time,$debug) = @_;
889: $id=&escape($name.':'.$id);
890: my $setvalue=$value;
891: if (!defined($setvalue)) {
892: $setvalue='__undef__';
893: }
894: if (!defined($time) ) {
895: $time=600;
896: }
897: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
898: $memcache->set($id,$setvalue,$time);
899: # need to make a copy of $value
900: #&make_room($id,$value,$debug);
901: return $value;
902: }
903:
904: sub make_room {
905: my ($id,$value,$debug)=@_;
906: $remembered{$id}=$value;
907: if ($to_remember<0) { return; }
908: $accessed{$id}=[&gettimeofday()];
909: if (scalar(keys(%remembered)) <= $to_remember) { return; }
910: my $to_kick;
911: my $max_time=0;
912: foreach my $other (keys(%accessed)) {
913: if (&tv_interval($accessed{$other}) > $max_time) {
914: $to_kick=$other;
915: $max_time=&tv_interval($accessed{$other});
916: }
917: }
918: delete($remembered{$to_kick});
919: delete($accessed{$to_kick});
920: $kicks++;
921: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
922: return;
923: }
924:
925: sub purge_remembered {
926: #&logthis("Tossing ".scalar(keys(%remembered)));
927: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
928: undef(%remembered);
929: undef(%accessed);
930: }
931: # ------------------------------------- Read an entry from a user's environment
932:
933: sub userenvironment {
934: my ($udom,$unam,@what)=@_;
935: my %returnhash=();
936: my @answer=split(/\&/,
937: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
938: &homeserver($unam,$udom)));
939: my $i;
940: for ($i=0;$i<=$#what;$i++) {
941: $returnhash{$what[$i]}=&unescape($answer[$i]);
942: }
943: return %returnhash;
944: }
945:
946: # ---------------------------------------------------------- Get a studentphoto
947: sub studentphoto {
948: my ($udom,$unam,$ext) = @_;
949: my $home=&Apache::lonnet::homeserver($unam,$udom);
950: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext",$home);
951: my $url="/uploaded/$udom/$unam/internal/studentphoto.".$ext;
952: if ($ret ne 'ok') {
953: return '/adm/lonKaputt/lonlogo_broken.gif';
954: }
955: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
956: return $tokenurl;
957: }
958:
959: # -------------------------------------------------------------------- New chat
960:
961: sub chatsend {
962: my ($newentry,$anon)=@_;
963: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
964: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
965: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
966: &reply('chatsend:'.$cdom.':'.$cnum.':'.
967: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
968: &escape($newentry)),$chome);
969: }
970:
971: # ------------------------------------------ Find current version of a resource
972:
973: sub getversion {
974: my $fname=&clutter(shift);
975: unless ($fname=~/^\/res\//) { return -1; }
976: return ¤tversion(&filelocation('',$fname));
977: }
978:
979: sub currentversion {
980: my $fname=shift;
981: my ($result,$cached)=&is_cached_new('resversion',$fname);
982: if (defined($cached)) { return $result; }
983: my $author=$fname;
984: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
985: my ($udom,$uname)=split(/\//,$author);
986: my $home=homeserver($uname,$udom);
987: if ($home eq 'no_host') {
988: return -1;
989: }
990: my $answer=reply("currentversion:$fname",$home);
991: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
992: return -1;
993: }
994: return &do_cache_new('resversion',$fname,$answer,600);
995: }
996:
997: # ----------------------------- Subscribe to a resource, return URL if possible
998:
999: sub subscribe {
1000: my $fname=shift;
1001: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1002: $fname=~s/[\n\r]//g;
1003: my $author=$fname;
1004: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1005: my ($udom,$uname)=split(/\//,$author);
1006: my $home=homeserver($uname,$udom);
1007: if ($home eq 'no_host') {
1008: return 'not_found';
1009: }
1010: my $answer=reply("sub:$fname",$home);
1011: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1012: $answer.=' by '.$home;
1013: }
1014: return $answer;
1015: }
1016:
1017: # -------------------------------------------------------------- Replicate file
1018:
1019: sub repcopy {
1020: my $filename=shift;
1021: $filename=~s/\/+/\//g;
1022: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1023: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1024: if ($filename=~m|^/home/httpd/html/userfiles/| or
1025: $filename=~m -^/*(uploaded|editupload)/-) {
1026: return &repcopy_userfile($filename);
1027: }
1028: $filename=~s/[\n\r]//g;
1029: my $transname="$filename.in.transfer";
1030: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1031: my $remoteurl=subscribe($filename);
1032: if ($remoteurl =~ /^con_lost by/) {
1033: &logthis("Subscribe returned $remoteurl: $filename");
1034: return 'unavailable';
1035: } elsif ($remoteurl eq 'not_found') {
1036: #&logthis("Subscribe returned not_found: $filename");
1037: return 'not_found';
1038: } elsif ($remoteurl =~ /^rejected by/) {
1039: &logthis("Subscribe returned $remoteurl: $filename");
1040: return 'forbidden';
1041: } elsif ($remoteurl eq 'directory') {
1042: return 'ok';
1043: } else {
1044: my $author=$filename;
1045: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1046: my ($udom,$uname)=split(/\//,$author);
1047: my $home=homeserver($uname,$udom);
1048: unless ($home eq $perlvar{'lonHostID'}) {
1049: my @parts=split(/\//,$filename);
1050: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1051: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1052: &logthis("Malconfiguration for replication: $filename");
1053: return 'bad_request';
1054: }
1055: my $count;
1056: for ($count=5;$count<$#parts;$count++) {
1057: $path.="/$parts[$count]";
1058: if ((-e $path)!=1) {
1059: mkdir($path,0777);
1060: }
1061: }
1062: my $ua=new LWP::UserAgent;
1063: my $request=new HTTP::Request('GET',"$remoteurl");
1064: my $response=$ua->request($request,$transname);
1065: if ($response->is_error()) {
1066: unlink($transname);
1067: my $message=$response->status_line;
1068: &logthis("<font color=\"blue\">WARNING:"
1069: ." LWP get: $message: $filename</font>");
1070: return 'unavailable';
1071: } else {
1072: if ($remoteurl!~/\.meta$/) {
1073: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1074: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1075: if ($mresponse->is_error()) {
1076: unlink($filename.'.meta');
1077: &logthis(
1078: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1079: }
1080: }
1081: rename($transname,$filename);
1082: return 'ok';
1083: }
1084: }
1085: }
1086: }
1087:
1088: # ------------------------------------------------ Get server side include body
1089: sub ssi_body {
1090: my ($filelink,%form)=@_;
1091: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1092: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1093: }
1094: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1095: &ssi($filelink,%form));
1096: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs;
1097: $output=~s/^.*?\<body[^\>]*\>//si;
1098: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1099: return $output;
1100: }
1101:
1102: # --------------------------------------------------------- Server Side Include
1103:
1104: sub ssi {
1105:
1106: my ($fn,%form)=@_;
1107:
1108: my $ua=new LWP::UserAgent;
1109:
1110: my $request;
1111:
1112: if (%form) {
1113: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1114: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1115: } else {
1116: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1117: }
1118:
1119: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1120: my $response=$ua->request($request);
1121:
1122: return $response->content;
1123: }
1124:
1125: sub externalssi {
1126: my ($url)=@_;
1127: my $ua=new LWP::UserAgent;
1128: my $request=new HTTP::Request('GET',$url);
1129: my $response=$ua->request($request);
1130: return $response->content;
1131: }
1132:
1133: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1134:
1135: sub allowuploaded {
1136: my ($srcurl,$url)=@_;
1137: $url=&clutter(&declutter($url));
1138: my $dir=$url;
1139: $dir=~s/\/[^\/]+$//;
1140: my %httpref=();
1141: my $httpurl=&hreflocation('',$url);
1142: $httpref{'httpref.'.$httpurl}=$srcurl;
1143: &Apache::lonnet::appenv(%httpref);
1144: }
1145:
1146: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1147: # input: action, courseID, current domain, intended
1148: # path to file, source of file, instruction to parse file for objects,
1149: # ref to hash for embedded objects,
1150: # ref to hash for codebase of java objects.
1151: #
1152: # output: url to file (if action was uploaddoc),
1153: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1154: #
1155: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1156: # course.
1157: #
1158: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1159: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1160: # course's home server.
1161: #
1162: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1163: # be copied from $source (current location) to
1164: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1165: # and will then be copied to
1166: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1167: # course's home server.
1168: #
1169: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1170: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1171: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1172: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1173: # in course's home server.
1174: #
1175:
1176: sub process_coursefile {
1177: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1178: my $fetchresult;
1179: my $home=&homeserver($docuname,$docudom);
1180: if ($action eq 'propagate') {
1181: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1182: $home);
1183: } else {
1184: my $fpath = '';
1185: my $fname = $file;
1186: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1187: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1188: my $filepath = &build_filepath($fpath);
1189: if ($action eq 'copy') {
1190: if ($source eq '') {
1191: $fetchresult = 'no source file';
1192: return $fetchresult;
1193: } else {
1194: my $destination = $filepath.'/'.$fname;
1195: rename($source,$destination);
1196: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1197: $home);
1198: }
1199: } elsif ($action eq 'uploaddoc') {
1200: open(my $fh,'>'.$filepath.'/'.$fname);
1201: print $fh $env{'form.'.$source};
1202: close($fh);
1203: if ($parser eq 'parse') {
1204: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1205: unless ($parse_result eq 'ok') {
1206: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1207: }
1208: }
1209: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1210: $home);
1211: if ($fetchresult eq 'ok') {
1212: return '/uploaded/'.$fpath.'/'.$fname;
1213: } else {
1214: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1215: ' to host '.$home.': '.$fetchresult);
1216: return '/adm/notfound.html';
1217: }
1218: }
1219: }
1220: unless ( $fetchresult eq 'ok') {
1221: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1222: ' to host '.$home.': '.$fetchresult);
1223: }
1224: return $fetchresult;
1225: }
1226:
1227: sub build_filepath {
1228: my ($fpath) = @_;
1229: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1230: unless ($fpath eq '') {
1231: my @parts=split('/',$fpath);
1232: foreach my $part (@parts) {
1233: $filepath.= '/'.$part;
1234: if ((-e $filepath)!=1) {
1235: mkdir($filepath,0777);
1236: }
1237: }
1238: }
1239: return $filepath;
1240: }
1241:
1242: sub store_edited_file {
1243: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1244: my $file = $primary_url;
1245: $file =~ s#^/uploaded/$docudom/$docuname/##;
1246: my $fpath = '';
1247: my $fname = $file;
1248: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1249: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1250: my $filepath = &build_filepath($fpath);
1251: open(my $fh,'>'.$filepath.'/'.$fname);
1252: print $fh $content;
1253: close($fh);
1254: my $home=&homeserver($docuname,$docudom);
1255: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1256: $home);
1257: if ($$fetchresult eq 'ok') {
1258: return '/uploaded/'.$fpath.'/'.$fname;
1259: } else {
1260: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1261: ' to host '.$home.': '.$$fetchresult);
1262: return '/adm/notfound.html';
1263: }
1264: }
1265:
1266: sub clean_filename {
1267: my ($fname)=@_;
1268: # Replace Windows backslashes by forward slashes
1269: $fname=~s/\\/\//g;
1270: # Get rid of everything but the actual filename
1271: $fname=~s/^.*\/([^\/]+)$/$1/;
1272: # Replace spaces by underscores
1273: $fname=~s/\s+/\_/g;
1274: # Replace all other weird characters by nothing
1275: $fname=~s/[^\w\.\-]//g;
1276: # Replace all .\d. sequences with _\d. so they no longer look like version
1277: # numbers
1278: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1279: return $fname;
1280: }
1281:
1282: # --------------- Take an uploaded file and put it into the userfiles directory
1283: # input: $formname - the contents of the file are in $env{"form.$formname"}
1284: # the desired filenam is in $env{"form.$formname"}
1285: # $coursedoc - if true up to the current course
1286: # if false
1287: # $subdir - directory in userfile to store the file into
1288: # $parser, $allfiles, $codebase - unknown
1289: #
1290: # output: url of file in userspace, or error: <message>
1291: # or /adm/notfound.html if failure to upload occurse
1292:
1293:
1294: sub userfileupload {
1295: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase)=@_;
1296: if (!defined($subdir)) { $subdir='unknown'; }
1297: my $fname=$env{'form.'.$formname.'.filename'};
1298: $fname=&clean_filename($fname);
1299: # See if there is anything left
1300: unless ($fname) { return 'error: no uploaded file'; }
1301: chop($env{'form.'.$formname});
1302: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1303: my $now = time;
1304: my $filepath = 'tmp/helprequests/'.$now;
1305: my @parts=split(/\//,$filepath);
1306: my $fullpath = $perlvar{'lonDaemons'};
1307: for (my $i=0;$i<@parts;$i++) {
1308: $fullpath .= '/'.$parts[$i];
1309: if ((-e $fullpath)!=1) {
1310: mkdir($fullpath,0777);
1311: }
1312: }
1313: open(my $fh,'>'.$fullpath.'/'.$fname);
1314: print $fh $env{'form.'.$formname};
1315: close($fh);
1316: return $fullpath.'/'.$fname;
1317: }
1318: # Create the directory if not present
1319: $fname="$subdir/$fname";
1320: if ($coursedoc) {
1321: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1322: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1323: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1324: return &finishuserfileupload($docuname,$docudom,
1325: $formname,$fname,$parser,$allfiles,
1326: $codebase);
1327: } else {
1328: $fname=$env{'form.folder'}.'/'.$fname;
1329: return &process_coursefile('uploaddoc',$docuname,$docudom,
1330: $fname,$formname,$parser,
1331: $allfiles,$codebase);
1332: }
1333: } else {
1334: my $docuname=$env{'user.name'};
1335: my $docudom=$env{'user.domain'};
1336: return &finishuserfileupload($docuname,$docudom,$formname,
1337: $fname,$parser,$allfiles,$codebase);
1338: }
1339: }
1340:
1341: sub finishuserfileupload {
1342: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
1343: my $path=$docudom.'/'.$docuname.'/';
1344: my $filepath=$perlvar{'lonDocRoot'};
1345: my ($fnamepath,$file);
1346: $file=$fname;
1347: if ($fname=~m|/|) {
1348: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1349: $path.=$fnamepath.'/';
1350: }
1351: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1352: my $count;
1353: for ($count=4;$count<=$#parts;$count++) {
1354: $filepath.="/$parts[$count]";
1355: if ((-e $filepath)!=1) {
1356: mkdir($filepath,0777);
1357: }
1358: }
1359: # Save the file
1360: {
1361: if (!open(FH,'>'.$filepath.'/'.$file)) {
1362: &logthis('Failed to create '.$filepath.'/'.$file);
1363: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1364: return '/adm/notfound.html';
1365: }
1366: if (!print FH ($env{'form.'.$formname})) {
1367: &logthis('Failed to write to '.$filepath.'/'.$file);
1368: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1369: return '/adm/notfound.html';
1370: }
1371: close(FH);
1372: }
1373: if ($parser eq 'parse') {
1374: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1375: $codebase);
1376: unless ($parse_result eq 'ok') {
1377: &logthis('Failed to parse '.$filepath.$file.
1378: ' for embedded media: '.$parse_result);
1379: }
1380: }
1381: # Notify homeserver to grep it
1382: #
1383: my $docuhome=&homeserver($docuname,$docudom);
1384: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1385: if ($fetchresult eq 'ok') {
1386: #
1387: # Return the URL to it
1388: return '/uploaded/'.$path.$file;
1389: } else {
1390: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1391: ': '.$fetchresult);
1392: return '/adm/notfound.html';
1393: }
1394: }
1395:
1396: sub extract_embedded_items {
1397: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1398: my @state = ();
1399: my %javafiles = (
1400: codebase => '',
1401: code => '',
1402: archive => ''
1403: );
1404: my %mediafiles = (
1405: src => '',
1406: movie => '',
1407: );
1408: my $p;
1409: if ($content) {
1410: $p = HTML::LCParser->new($content);
1411: } else {
1412: $p = HTML::LCParser->new($filepath.'/'.$file);
1413: }
1414: while (my $t=$p->get_token()) {
1415: if ($t->[0] eq 'S') {
1416: my ($tagname, $attr) = ($t->[1],$t->[2]);
1417: push (@state, $tagname);
1418: if (lc($tagname) eq 'allow') {
1419: &add_filetype($allfiles,$attr->{'src'},'src');
1420: }
1421: if (lc($tagname) eq 'img') {
1422: &add_filetype($allfiles,$attr->{'src'},'src');
1423: }
1424: if (lc($tagname) eq 'script') {
1425: if ($attr->{'archive'} =~ /\.jar$/i) {
1426: &add_filetype($allfiles,$attr->{'archive'},'archive');
1427: } else {
1428: &add_filetype($allfiles,$attr->{'src'},'src');
1429: }
1430: }
1431: if (lc($tagname) eq 'link') {
1432: if (lc($attr->{'rel'}) eq 'stylesheet') {
1433: &add_filetype($allfiles,$attr->{'href'},'href');
1434: }
1435: }
1436: if (lc($tagname) eq 'object' ||
1437: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1438: foreach my $item (keys(%javafiles)) {
1439: $javafiles{$item} = '';
1440: }
1441: }
1442: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1443: my $name = lc($attr->{'name'});
1444: foreach my $item (keys(%javafiles)) {
1445: if ($name eq $item) {
1446: $javafiles{$item} = $attr->{'value'};
1447: last;
1448: }
1449: }
1450: foreach my $item (keys(%mediafiles)) {
1451: if ($name eq $item) {
1452: &add_filetype($allfiles, $attr->{'value'}, 'value');
1453: last;
1454: }
1455: }
1456: }
1457: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1458: foreach my $item (keys(%javafiles)) {
1459: if ($attr->{$item}) {
1460: $javafiles{$item} = $attr->{$item};
1461: last;
1462: }
1463: }
1464: foreach my $item (keys(%mediafiles)) {
1465: if ($attr->{$item}) {
1466: &add_filetype($allfiles,$attr->{$item},$item);
1467: last;
1468: }
1469: }
1470: }
1471: } elsif ($t->[0] eq 'E') {
1472: my ($tagname) = ($t->[1]);
1473: if ($javafiles{'codebase'} ne '') {
1474: $javafiles{'codebase'} .= '/';
1475: }
1476: if (lc($tagname) eq 'applet' ||
1477: lc($tagname) eq 'object' ||
1478: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1479: ) {
1480: foreach my $item (keys(%javafiles)) {
1481: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1482: my $file=$javafiles{'codebase'}.$javafiles{$item};
1483: &add_filetype($allfiles,$file,$item);
1484: }
1485: }
1486: }
1487: pop @state;
1488: }
1489: }
1490: return 'ok';
1491: }
1492:
1493: sub add_filetype {
1494: my ($allfiles,$file,$type)=@_;
1495: if (exists($allfiles->{$file})) {
1496: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1497: push(@{$allfiles->{$file}}, &escape($type));
1498: }
1499: } else {
1500: @{$allfiles->{$file}} = (&escape($type));
1501: }
1502: }
1503:
1504: sub removeuploadedurl {
1505: my ($url)=@_;
1506: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1507: return &removeuserfile($uname,$udom,$fname);
1508: }
1509:
1510: sub removeuserfile {
1511: my ($docuname,$docudom,$fname)=@_;
1512: my $home=&homeserver($docuname,$docudom);
1513: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1514: }
1515:
1516: sub mkdiruserfile {
1517: my ($docuname,$docudom,$dir)=@_;
1518: my $home=&homeserver($docuname,$docudom);
1519: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1520: }
1521:
1522: sub renameuserfile {
1523: my ($docuname,$docudom,$old,$new)=@_;
1524: my $home=&homeserver($docuname,$docudom);
1525: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1526: &escape("$new"),$home);
1527: }
1528:
1529: # ------------------------------------------------------------------------- Log
1530:
1531: sub log {
1532: my ($dom,$nam,$hom,$what)=@_;
1533: return critical("log:$dom:$nam:$what",$hom);
1534: }
1535:
1536: # ------------------------------------------------------------------ Course Log
1537: #
1538: # This routine flushes several buffers of non-mission-critical nature
1539: #
1540:
1541: sub flushcourselogs {
1542: &logthis('Flushing log buffers');
1543: #
1544: # course logs
1545: # This is a log of all transactions in a course, which can be used
1546: # for data mining purposes
1547: #
1548: # It also collects the courseid database, which lists last transaction
1549: # times and course titles for all courseids
1550: #
1551: my %courseidbuffer=();
1552: foreach (keys %courselogs) {
1553: my $crsid=$_;
1554: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1555: &escape($courselogs{$crsid}),
1556: $coursehombuf{$crsid}) eq 'ok') {
1557: delete $courselogs{$crsid};
1558: } else {
1559: &logthis('Failed to flush log buffer for '.$crsid);
1560: if (length($courselogs{$crsid})>40000) {
1561: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
1562: " exceeded maximum size, deleting.</font>");
1563: delete $courselogs{$crsid};
1564: }
1565: }
1566: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1567: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1568: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1569: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1570: } else {
1571: $courseidbuffer{$coursehombuf{$crsid}}=
1572: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1573: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1574: }
1575: }
1576: #
1577: # Write course id database (reverse lookup) to homeserver of courses
1578: # Is used in pickcourse
1579: #
1580: foreach (keys %courseidbuffer) {
1581: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1582: }
1583: #
1584: # File accesses
1585: # Writes to the dynamic metadata of resources to get hit counts, etc.
1586: #
1587: foreach my $entry (keys(%accesshash)) {
1588: if ($entry =~ /___count$/) {
1589: my ($dom,$name);
1590: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1591: if (! defined($dom) || $dom eq '' ||
1592: ! defined($name) || $name eq '') {
1593: my $cid = $env{'request.course.id'};
1594: $dom = $env{'request.'.$cid.'.domain'};
1595: $name = $env{'request.'.$cid.'.num'};
1596: }
1597: my $value = $accesshash{$entry};
1598: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1599: my %temphash=($url => $value);
1600: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1601: if ($result eq 'ok') {
1602: delete $accesshash{$entry};
1603: } elsif ($result eq 'unknown_cmd') {
1604: # Target server has old code running on it.
1605: my %temphash=($entry => $value);
1606: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1607: delete $accesshash{$entry};
1608: }
1609: }
1610: } else {
1611: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1612: my %temphash=($entry => $accesshash{$entry});
1613: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1614: delete $accesshash{$entry};
1615: }
1616: }
1617: }
1618: #
1619: # Roles
1620: # Reverse lookup of user roles for course faculty/staff and co-authorship
1621: #
1622: foreach (keys %userrolehash) {
1623: my $entry=$_;
1624: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1625: split(/\:/,$entry);
1626: if (&Apache::lonnet::put('nohist_userroles',
1627: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1628: $rudom,$runame) eq 'ok') {
1629: delete $userrolehash{$entry};
1630: }
1631: }
1632: #
1633: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1634: #
1635: my %domrolebuffer = ();
1636: foreach my $entry (keys %domainrolehash) {
1637: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1638: if ($domrolebuffer{$rudom}) {
1639: $domrolebuffer{$rudom}.='&'.&escape($entry).
1640: '='.&escape($domainrolehash{$entry});
1641: } else {
1642: $domrolebuffer{$rudom}.=&escape($entry).
1643: '='.&escape($domainrolehash{$entry});
1644: }
1645: delete $domainrolehash{$entry};
1646: }
1647: foreach my $dom (keys(%domrolebuffer)) {
1648: foreach my $tryserver (keys %libserv) {
1649: if ($hostdom{$tryserver} eq $dom) {
1650: unless (&reply('domroleput:'.$dom.':'.
1651: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1652: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1653: }
1654: }
1655: }
1656: }
1657: $dumpcount++;
1658: }
1659:
1660: sub courselog {
1661: my $what=shift;
1662: $what=time.':'.$what;
1663: unless ($env{'request.course.id'}) { return ''; }
1664: $coursedombuf{$env{'request.course.id'}}=
1665: $env{'course.'.$env{'request.course.id'}.'.domain'};
1666: $coursenumbuf{$env{'request.course.id'}}=
1667: $env{'course.'.$env{'request.course.id'}.'.num'};
1668: $coursehombuf{$env{'request.course.id'}}=
1669: $env{'course.'.$env{'request.course.id'}.'.home'};
1670: $coursedescrbuf{$env{'request.course.id'}}=
1671: $env{'course.'.$env{'request.course.id'}.'.description'};
1672: $courseinstcodebuf{$env{'request.course.id'}}=
1673: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1674: $courseownerbuf{$env{'request.course.id'}}=
1675: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1676: if (defined $courselogs{$env{'request.course.id'}}) {
1677: $courselogs{$env{'request.course.id'}}.='&'.$what;
1678: } else {
1679: $courselogs{$env{'request.course.id'}}.=$what;
1680: }
1681: if (length($courselogs{$env{'request.course.id'}})>4048) {
1682: &flushcourselogs();
1683: }
1684: }
1685:
1686: sub courseacclog {
1687: my $fnsymb=shift;
1688: unless ($env{'request.course.id'}) { return ''; }
1689: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1690: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1691: $what.=':POST';
1692: # FIXME: Probably ought to escape things....
1693: foreach (keys %env) {
1694: if ($_=~/^form\.(.*)/) {
1695: $what.=':'.$1.'='.$env{$_};
1696: }
1697: }
1698: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1699: # FIXME: We should not be depending on a form parameter that someone
1700: # editing lonsearchcat.pm might change in the future.
1701: if ($env{'form.phase'} eq 'course_search') {
1702: $what.= ':POST';
1703: # FIXME: Probably ought to escape things....
1704: foreach my $element ('courseexp','crsfulltext','crsrelated',
1705: 'crsdiscuss') {
1706: $what.=':'.$element.'='.$env{'form.'.$element};
1707: }
1708: }
1709: }
1710: &courselog($what);
1711: }
1712:
1713: sub countacc {
1714: my $url=&declutter(shift);
1715: return if (! defined($url) || $url eq '');
1716: unless ($env{'request.course.id'}) { return ''; }
1717: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1718: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1719: $accesshash{$key}++;
1720: }
1721:
1722: sub linklog {
1723: my ($from,$to)=@_;
1724: $from=&declutter($from);
1725: $to=&declutter($to);
1726: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1727: $accesshash{$to.'___'.$from.'___goto'}=1;
1728: }
1729:
1730: sub userrolelog {
1731: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1732: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
1733: ($trole=~/^in/) || ($trole=~/^cc/) ||
1734: ($trole=~/^ep/) || ($trole=~/^cr/) ||
1735: ($trole=~/^ta/)) {
1736: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1737: $userrolehash
1738: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1739: =$tend.':'.$tstart;
1740: }
1741: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
1742: ($trole=~/^li/) || ($trole=~/^li/) ||
1743: ($trole=~/^au/) || ($trole=~/^dg/) ||
1744: ($trole=~/^sc/)) {
1745: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1746: $domainrolehash
1747: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1748: = $tend.':'.$tstart;
1749: }
1750: }
1751:
1752: sub get_course_adv_roles {
1753: my $cid=shift;
1754: $cid=$env{'request.course.id'} unless (defined($cid));
1755: my %coursehash=&coursedescription($cid);
1756: my %nothide=();
1757: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1758: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1759: }
1760: my %returnhash=();
1761: my %dumphash=
1762: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1763: my $now=time;
1764: foreach (keys %dumphash) {
1765: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1766: if (($tstart) && ($tstart<0)) { next; }
1767: if (($tend) && ($tend<$now)) { next; }
1768: if (($tstart) && ($now<$tstart)) { next; }
1769: my ($role,$username,$domain,$section)=split(/\:/,$_);
1770: if ($username eq '' || $domain eq '') { next; }
1771: if ((&privileged($username,$domain)) &&
1772: (!$nothide{$username.':'.$domain})) { next; }
1773: if ($role eq 'cr') { next; }
1774: my $key=&plaintext($role);
1775: if ($role =~ /^cr/) {
1776: $key=(split('/',$role))[3];
1777: }
1778: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1779: if ($returnhash{$key}) {
1780: $returnhash{$key}.=','.$username.':'.$domain;
1781: } else {
1782: $returnhash{$key}=$username.':'.$domain;
1783: }
1784: }
1785: return %returnhash;
1786: }
1787:
1788: sub get_my_roles {
1789: my ($uname,$udom)=@_;
1790: unless (defined($uname)) { $uname=$env{'user.name'}; }
1791: unless (defined($udom)) { $udom=$env{'user.domain'}; }
1792: my %dumphash=
1793: &dump('nohist_userroles',$udom,$uname);
1794: my %returnhash=();
1795: my $now=time;
1796: foreach (keys %dumphash) {
1797: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1798: if (($tstart) && ($tstart<0)) { next; }
1799: if (($tend) && ($tend<$now)) { next; }
1800: if (($tstart) && ($now<$tstart)) { next; }
1801: my ($role,$username,$domain,$section)=split(/\:/,$_);
1802: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1803: }
1804: return %returnhash;
1805: }
1806:
1807: # ----------------------------------------------------- Frontpage Announcements
1808: #
1809: #
1810:
1811: sub postannounce {
1812: my ($server,$text)=@_;
1813: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1814: unless ($text=~/\w/) { $text=''; }
1815: return &reply('setannounce:'.&escape($text),$server);
1816: }
1817:
1818: sub getannounce {
1819:
1820: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1821: my $announcement='';
1822: while (<$fh>) { $announcement .=$_; }
1823: close($fh);
1824: if ($announcement=~/\w/) {
1825: return
1826: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1827: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1828: } else {
1829: return '';
1830: }
1831: } else {
1832: return '';
1833: }
1834: }
1835:
1836: # ---------------------------------------------------------- Course ID routines
1837: # Deal with domain's nohist_courseid.db files
1838: #
1839:
1840: sub courseidput {
1841: my ($domain,$what,$coursehome)=@_;
1842: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1843: }
1844:
1845: sub courseiddump {
1846: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref)=@_;
1847: my %returnhash=();
1848: unless ($domfilter) { $domfilter=''; }
1849: foreach my $tryserver (keys %libserv) {
1850: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1851: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1852: foreach (
1853: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1854: $sincefilter.':'.&escape($descfilter).':'.
1855: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter),
1856: $tryserver))) {
1857: my ($key,$value)=split(/\=/,$_);
1858: if (($key) && ($value)) {
1859: $returnhash{&unescape($key)}=$value;
1860: }
1861: }
1862: }
1863: }
1864: }
1865: return %returnhash;
1866: }
1867:
1868: # ---------------------------------------------------------- DC e-mail
1869:
1870: sub dcmailput {
1871: my ($domain,$msgid,$message,$server)=@_;
1872: my $status = &Apache::lonnet::critical(
1873: 'dcmailput:'.$domain.':'.&Apache::lonnet::escape($msgid).'='.
1874: &Apache::lonnet::escape($message),$server);
1875: return $status;
1876: }
1877:
1878: sub dcmaildump {
1879: my ($dom,$startdate,$enddate,$senders) = @_;
1880: my %returnhash=();
1881: if (exists($domain_primary{$dom})) {
1882: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
1883: &escape($enddate).':';
1884: my @esc_senders=map { &escape($_)} @$senders;
1885: $cmd.=&escape(join('&',@esc_senders));
1886: foreach (split(/\&/,&reply($cmd,$domain_primary{$dom}))) {
1887: my ($key,$value) = split(/\=/,$_);
1888: if (($key) && ($value)) {
1889: $returnhash{&unescape($key)} = &unescape($value);
1890: }
1891: }
1892: }
1893: return %returnhash;
1894: }
1895: # ---------------------------------------------------------- Domain roles
1896:
1897: sub get_domain_roles {
1898: my ($dom,$roles,$startdate,$enddate)=@_;
1899: if (undef($startdate) || $startdate eq '') {
1900: $startdate = '.';
1901: }
1902: if (undef($enddate) || $enddate eq '') {
1903: $enddate = '.';
1904: }
1905: my $rolelist = join(':',@{$roles});
1906: my %personnel = ();
1907: foreach my $tryserver (keys(%libserv)) {
1908: if ($hostdom{$tryserver} eq $dom) {
1909: %{$personnel{$tryserver}}=();
1910: foreach (
1911: split(/\&/,&reply('domrolesdump:'.$dom.':'.
1912: &escape($startdate).':'.&escape($enddate).':'.
1913: &escape($rolelist), $tryserver))) {
1914: my($key,$value) = split(/\=/,$_);
1915: if (($key) && ($value)) {
1916: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
1917: }
1918: }
1919: }
1920: }
1921: return %personnel;
1922: }
1923:
1924: # ----------------------------------------------------------- Check out an item
1925:
1926: sub get_first_access {
1927: my ($type,$argsymb)=@_;
1928: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1929: if ($argsymb) { $symb=$argsymb; }
1930: my ($map,$id,$res)=&decode_symb($symb);
1931: if ($type eq 'map') {
1932: $res=&symbread($map);
1933: } else {
1934: $res=$symb;
1935: }
1936: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
1937: return $times{"$courseid\0$res"};
1938: }
1939:
1940: sub set_first_access {
1941: my ($type)=@_;
1942: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1943: my ($map,$id,$res)=&decode_symb($symb);
1944: if ($type eq 'map') {
1945: $res=&symbread($map);
1946: } else {
1947: $res=$symb;
1948: }
1949: my $firstaccess=&get_first_access($type,$symb);
1950: if (!$firstaccess) {
1951: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
1952: }
1953: return 'already_set';
1954: }
1955:
1956: sub checkout {
1957: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1958: my $now=time;
1959: my $lonhost=$perlvar{'lonHostID'};
1960: my $infostr=&escape(
1961: 'CHECKOUTTOKEN&'.
1962: $tuname.'&'.
1963: $tudom.'&'.
1964: $tcrsid.'&'.
1965: $symb.'&'.
1966: $now.'&'.$ENV{'REMOTE_ADDR'});
1967: my $token=&reply('tmpput:'.$infostr,$lonhost);
1968: if ($token=~/^error\:/) {
1969: &logthis("<font color=\"blue\">WARNING: ".
1970: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1971: "</font>");
1972: return '';
1973: }
1974:
1975: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1976: $token=~tr/a-z/A-Z/;
1977:
1978: my %infohash=('resource.0.outtoken' => $token,
1979: 'resource.0.checkouttime' => $now,
1980: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1981:
1982: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1983: return '';
1984: } else {
1985: &logthis("<font color=\"blue\">WARNING: ".
1986: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1987: "</font>");
1988: }
1989:
1990: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1991: &escape('Checkout '.$infostr.' - '.
1992: $token)) ne 'ok') {
1993: return '';
1994: } else {
1995: &logthis("<font color=\"blue\">WARNING: ".
1996: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1997: "</font>");
1998: }
1999: return $token;
2000: }
2001:
2002: # ------------------------------------------------------------ Check in an item
2003:
2004: sub checkin {
2005: my $token=shift;
2006: my $now=time;
2007: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2008: $lonhost=~tr/A-Z/a-z/;
2009: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
2010: $dtoken=~s/\W/\_/g;
2011: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2012: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2013:
2014: unless (($tuname) && ($tudom)) {
2015: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2016: return '';
2017: }
2018:
2019: unless (&allowed('mgr',$tcrsid)) {
2020: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2021: $env{'user.name'}.' - '.$env{'user.domain'});
2022: return '';
2023: }
2024:
2025: my %infohash=('resource.0.intoken' => $token,
2026: 'resource.0.checkintime' => $now,
2027: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2028:
2029: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2030: return '';
2031: }
2032:
2033: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2034: &escape('Checkin - '.$token)) ne 'ok') {
2035: return '';
2036: }
2037:
2038: return ($symb,$tuname,$tudom,$tcrsid);
2039: }
2040:
2041: # --------------------------------------------- Set Expire Date for Spreadsheet
2042:
2043: sub expirespread {
2044: my ($uname,$udom,$stype,$usymb)=@_;
2045: my $cid=$env{'request.course.id'};
2046: if ($cid) {
2047: my $now=time;
2048: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2049: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2050: $env{'course.'.$cid.'.num'}.
2051: ':nohist_expirationdates:'.
2052: &escape($key).'='.$now,
2053: $env{'course.'.$cid.'.home'})
2054: }
2055: return 'ok';
2056: }
2057:
2058: # ----------------------------------------------------- Devalidate Spreadsheets
2059:
2060: sub devalidate {
2061: my ($symb,$uname,$udom)=@_;
2062: my $cid=$env{'request.course.id'};
2063: if ($cid) {
2064: # delete the stored spreadsheets for
2065: # - the student level sheet of this user in course's homespace
2066: # - the assessment level sheet for this resource
2067: # for this user in user's homespace
2068: # - current conditional state info
2069: my $key=$uname.':'.$udom.':';
2070: my $status=
2071: &del('nohist_calculatedsheets',
2072: [$key.'studentcalc:'],
2073: $env{'course.'.$cid.'.domain'},
2074: $env{'course.'.$cid.'.num'})
2075: .' '.
2076: &del('nohist_calculatedsheets_'.$cid,
2077: [$key.'assesscalc:'.$symb],$udom,$uname);
2078: unless ($status eq 'ok ok') {
2079: &logthis('Could not devalidate spreadsheet '.
2080: $uname.' at '.$udom.' for '.
2081: $symb.': '.$status);
2082: }
2083: &delenv('user.state.'.$cid);
2084: }
2085: }
2086:
2087: sub get_scalar {
2088: my ($string,$end) = @_;
2089: my $value;
2090: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2091: $value = $1;
2092: } elsif ($$string =~ s/^([^&]*?)&//) {
2093: $value = $1;
2094: }
2095: return &unescape($value);
2096: }
2097:
2098: sub array2str {
2099: my (@array) = @_;
2100: my $result=&arrayref2str(\@array);
2101: $result=~s/^__ARRAY_REF__//;
2102: $result=~s/__END_ARRAY_REF__$//;
2103: return $result;
2104: }
2105:
2106: sub arrayref2str {
2107: my ($arrayref) = @_;
2108: my $result='__ARRAY_REF__';
2109: foreach my $elem (@$arrayref) {
2110: if(ref($elem) eq 'ARRAY') {
2111: $result.=&arrayref2str($elem).'&';
2112: } elsif(ref($elem) eq 'HASH') {
2113: $result.=&hashref2str($elem).'&';
2114: } elsif(ref($elem)) {
2115: #print("Got a ref of ".(ref($elem))." skipping.");
2116: } else {
2117: $result.=&escape($elem).'&';
2118: }
2119: }
2120: $result=~s/\&$//;
2121: $result .= '__END_ARRAY_REF__';
2122: return $result;
2123: }
2124:
2125: sub hash2str {
2126: my (%hash) = @_;
2127: my $result=&hashref2str(\%hash);
2128: $result=~s/^__HASH_REF__//;
2129: $result=~s/__END_HASH_REF__$//;
2130: return $result;
2131: }
2132:
2133: sub hashref2str {
2134: my ($hashref)=@_;
2135: my $result='__HASH_REF__';
2136: foreach (sort(keys(%$hashref))) {
2137: if (ref($_) eq 'ARRAY') {
2138: $result.=&arrayref2str($_).'=';
2139: } elsif (ref($_) eq 'HASH') {
2140: $result.=&hashref2str($_).'=';
2141: } elsif (ref($_)) {
2142: $result.='=';
2143: #print("Got a ref of ".(ref($_))." skipping.");
2144: } else {
2145: if ($_) {$result.=&escape($_).'=';} else { last; }
2146: }
2147:
2148: if(ref($hashref->{$_}) eq 'ARRAY') {
2149: $result.=&arrayref2str($hashref->{$_}).'&';
2150: } elsif(ref($hashref->{$_}) eq 'HASH') {
2151: $result.=&hashref2str($hashref->{$_}).'&';
2152: } elsif(ref($hashref->{$_})) {
2153: $result.='&';
2154: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
2155: } else {
2156: $result.=&escape($hashref->{$_}).'&';
2157: }
2158: }
2159: $result=~s/\&$//;
2160: $result .= '__END_HASH_REF__';
2161: return $result;
2162: }
2163:
2164: sub str2hash {
2165: my ($string)=@_;
2166: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2167: return %$hash;
2168: }
2169:
2170: sub str2hashref {
2171: my ($string) = @_;
2172:
2173: my %hash;
2174:
2175: if($string !~ /^__HASH_REF__/) {
2176: if (! ($string eq '' || !defined($string))) {
2177: $hash{'error'}='Not hash reference';
2178: }
2179: return (\%hash, $string);
2180: }
2181:
2182: $string =~ s/^__HASH_REF__//;
2183:
2184: while($string !~ /^__END_HASH_REF__/) {
2185: #key
2186: my $key='';
2187: if($string =~ /^__HASH_REF__/) {
2188: ($key, $string)=&str2hashref($string);
2189: if(defined($key->{'error'})) {
2190: $hash{'error'}='Bad data';
2191: return (\%hash, $string);
2192: }
2193: } elsif($string =~ /^__ARRAY_REF__/) {
2194: ($key, $string)=&str2arrayref($string);
2195: if($key->[0] eq 'Array reference error') {
2196: $hash{'error'}='Bad data';
2197: return (\%hash, $string);
2198: }
2199: } else {
2200: $string =~ s/^(.*?)=//;
2201: $key=&unescape($1);
2202: }
2203: $string =~ s/^=//;
2204:
2205: #value
2206: my $value='';
2207: if($string =~ /^__HASH_REF__/) {
2208: ($value, $string)=&str2hashref($string);
2209: if(defined($value->{'error'})) {
2210: $hash{'error'}='Bad data';
2211: return (\%hash, $string);
2212: }
2213: } elsif($string =~ /^__ARRAY_REF__/) {
2214: ($value, $string)=&str2arrayref($string);
2215: if($value->[0] eq 'Array reference error') {
2216: $hash{'error'}='Bad data';
2217: return (\%hash, $string);
2218: }
2219: } else {
2220: $value=&get_scalar(\$string,'__END_HASH_REF__');
2221: }
2222: $string =~ s/^&//;
2223:
2224: $hash{$key}=$value;
2225: }
2226:
2227: $string =~ s/^__END_HASH_REF__//;
2228:
2229: return (\%hash, $string);
2230: }
2231:
2232: sub str2array {
2233: my ($string)=@_;
2234: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2235: return @$array;
2236: }
2237:
2238: sub str2arrayref {
2239: my ($string) = @_;
2240: my @array;
2241:
2242: if($string !~ /^__ARRAY_REF__/) {
2243: if (! ($string eq '' || !defined($string))) {
2244: $array[0]='Array reference error';
2245: }
2246: return (\@array, $string);
2247: }
2248:
2249: $string =~ s/^__ARRAY_REF__//;
2250:
2251: while($string !~ /^__END_ARRAY_REF__/) {
2252: my $value='';
2253: if($string =~ /^__HASH_REF__/) {
2254: ($value, $string)=&str2hashref($string);
2255: if(defined($value->{'error'})) {
2256: $array[0] ='Array reference error';
2257: return (\@array, $string);
2258: }
2259: } elsif($string =~ /^__ARRAY_REF__/) {
2260: ($value, $string)=&str2arrayref($string);
2261: if($value->[0] eq 'Array reference error') {
2262: $array[0] ='Array reference error';
2263: return (\@array, $string);
2264: }
2265: } else {
2266: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2267: }
2268: $string =~ s/^&//;
2269:
2270: push(@array, $value);
2271: }
2272:
2273: $string =~ s/^__END_ARRAY_REF__//;
2274:
2275: return (\@array, $string);
2276: }
2277:
2278: # -------------------------------------------------------------------Temp Store
2279:
2280: sub tmpreset {
2281: my ($symb,$namespace,$domain,$stuname) = @_;
2282: if (!$symb) {
2283: $symb=&symbread();
2284: if (!$symb) { $symb= $env{'request.url'}; }
2285: }
2286: $symb=escape($symb);
2287:
2288: if (!$namespace) { $namespace=$env{'request.state'}; }
2289: $namespace=~s/\//\_/g;
2290: $namespace=~s/\W//g;
2291:
2292: if (!$domain) { $domain=$env{'user.domain'}; }
2293: if (!$stuname) { $stuname=$env{'user.name'}; }
2294: if ($domain eq 'public' && $stuname eq 'public') {
2295: $stuname=$ENV{'REMOTE_ADDR'};
2296: }
2297: my $path=$perlvar{'lonDaemons'}.'/tmp';
2298: my %hash;
2299: if (tie(%hash,'GDBM_File',
2300: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2301: &GDBM_WRCREAT(),0640)) {
2302: foreach my $key (keys %hash) {
2303: if ($key=~ /:$symb/) {
2304: delete($hash{$key});
2305: }
2306: }
2307: }
2308: }
2309:
2310: sub tmpstore {
2311: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2312:
2313: if (!$symb) {
2314: $symb=&symbread();
2315: if (!$symb) { $symb= $env{'request.url'}; }
2316: }
2317: $symb=escape($symb);
2318:
2319: if (!$namespace) {
2320: # I don't think we would ever want to store this for a course.
2321: # it seems this will only be used if we don't have a course.
2322: #$namespace=$env{'request.course.id'};
2323: #if (!$namespace) {
2324: $namespace=$env{'request.state'};
2325: #}
2326: }
2327: $namespace=~s/\//\_/g;
2328: $namespace=~s/\W//g;
2329: if (!$domain) { $domain=$env{'user.domain'}; }
2330: if (!$stuname) { $stuname=$env{'user.name'}; }
2331: if ($domain eq 'public' && $stuname eq 'public') {
2332: $stuname=$ENV{'REMOTE_ADDR'};
2333: }
2334: my $now=time;
2335: my %hash;
2336: my $path=$perlvar{'lonDaemons'}.'/tmp';
2337: if (tie(%hash,'GDBM_File',
2338: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2339: &GDBM_WRCREAT(),0640)) {
2340: $hash{"version:$symb"}++;
2341: my $version=$hash{"version:$symb"};
2342: my $allkeys='';
2343: foreach my $key (keys(%$storehash)) {
2344: $allkeys.=$key.':';
2345: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2346: }
2347: $hash{"$version:$symb:timestamp"}=$now;
2348: $allkeys.='timestamp';
2349: $hash{"$version:keys:$symb"}=$allkeys;
2350: if (untie(%hash)) {
2351: return 'ok';
2352: } else {
2353: return "error:$!";
2354: }
2355: } else {
2356: return "error:$!";
2357: }
2358: }
2359:
2360: # -----------------------------------------------------------------Temp Restore
2361:
2362: sub tmprestore {
2363: my ($symb,$namespace,$domain,$stuname) = @_;
2364:
2365: if (!$symb) {
2366: $symb=&symbread();
2367: if (!$symb) { $symb= $env{'request.url'}; }
2368: }
2369: $symb=escape($symb);
2370:
2371: if (!$namespace) { $namespace=$env{'request.state'}; }
2372:
2373: if (!$domain) { $domain=$env{'user.domain'}; }
2374: if (!$stuname) { $stuname=$env{'user.name'}; }
2375: if ($domain eq 'public' && $stuname eq 'public') {
2376: $stuname=$ENV{'REMOTE_ADDR'};
2377: }
2378: my %returnhash;
2379: $namespace=~s/\//\_/g;
2380: $namespace=~s/\W//g;
2381: my %hash;
2382: my $path=$perlvar{'lonDaemons'}.'/tmp';
2383: if (tie(%hash,'GDBM_File',
2384: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2385: &GDBM_READER(),0640)) {
2386: my $version=$hash{"version:$symb"};
2387: $returnhash{'version'}=$version;
2388: my $scope;
2389: for ($scope=1;$scope<=$version;$scope++) {
2390: my $vkeys=$hash{"$scope:keys:$symb"};
2391: my @keys=split(/:/,$vkeys);
2392: my $key;
2393: $returnhash{"$scope:keys"}=$vkeys;
2394: foreach $key (@keys) {
2395: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2396: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2397: }
2398: }
2399: if (!(untie(%hash))) {
2400: return "error:$!";
2401: }
2402: } else {
2403: return "error:$!";
2404: }
2405: return %returnhash;
2406: }
2407:
2408: # ----------------------------------------------------------------------- Store
2409:
2410: sub store {
2411: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2412: my $home='';
2413:
2414: if ($stuname) { $home=&homeserver($stuname,$domain); }
2415:
2416: $symb=&symbclean($symb);
2417: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2418:
2419: if (!$domain) { $domain=$env{'user.domain'}; }
2420: if (!$stuname) { $stuname=$env{'user.name'}; }
2421:
2422: &devalidate($symb,$stuname,$domain);
2423:
2424: $symb=escape($symb);
2425: if (!$namespace) {
2426: unless ($namespace=$env{'request.course.id'}) {
2427: return '';
2428: }
2429: }
2430: if (!$home) { $home=$env{'user.home'}; }
2431:
2432: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2433: $$storehash{'host'}=$perlvar{'lonHostID'};
2434:
2435: my $namevalue='';
2436: foreach (keys %$storehash) {
2437: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2438: }
2439: $namevalue=~s/\&$//;
2440: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2441: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2442: }
2443:
2444: # -------------------------------------------------------------- Critical Store
2445:
2446: sub cstore {
2447: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2448: my $home='';
2449:
2450: if ($stuname) { $home=&homeserver($stuname,$domain); }
2451:
2452: $symb=&symbclean($symb);
2453: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2454:
2455: if (!$domain) { $domain=$env{'user.domain'}; }
2456: if (!$stuname) { $stuname=$env{'user.name'}; }
2457:
2458: &devalidate($symb,$stuname,$domain);
2459:
2460: $symb=escape($symb);
2461: if (!$namespace) {
2462: unless ($namespace=$env{'request.course.id'}) {
2463: return '';
2464: }
2465: }
2466: if (!$home) { $home=$env{'user.home'}; }
2467:
2468: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2469: $$storehash{'host'}=$perlvar{'lonHostID'};
2470:
2471: my $namevalue='';
2472: foreach (keys %$storehash) {
2473: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2474: }
2475: $namevalue=~s/\&$//;
2476: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2477: return critical
2478: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2479: }
2480:
2481: # --------------------------------------------------------------------- Restore
2482:
2483: sub restore {
2484: my ($symb,$namespace,$domain,$stuname) = @_;
2485: my $home='';
2486:
2487: if ($stuname) { $home=&homeserver($stuname,$domain); }
2488:
2489: if (!$symb) {
2490: unless ($symb=escape(&symbread())) { return ''; }
2491: } else {
2492: $symb=&escape(&symbclean($symb));
2493: }
2494: if (!$namespace) {
2495: unless ($namespace=$env{'request.course.id'}) {
2496: return '';
2497: }
2498: }
2499: if (!$domain) { $domain=$env{'user.domain'}; }
2500: if (!$stuname) { $stuname=$env{'user.name'}; }
2501: if (!$home) { $home=$env{'user.home'}; }
2502: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2503:
2504: my %returnhash=();
2505: foreach (split(/\&/,$answer)) {
2506: my ($name,$value)=split(/\=/,$_);
2507: $returnhash{&unescape($name)}=&thaw_unescape($value);
2508: }
2509: my $version;
2510: for ($version=1;$version<=$returnhash{'version'};$version++) {
2511: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2512: $returnhash{$_}=$returnhash{$version.':'.$_};
2513: }
2514: }
2515: return %returnhash;
2516: }
2517:
2518: # ---------------------------------------------------------- Course Description
2519:
2520: sub coursedescription {
2521: my $courseid=shift;
2522: $courseid=~s/^\///;
2523: $courseid=~s/\_/\//g;
2524: my ($cdomain,$cnum)=split(/\//,$courseid);
2525: my $chome=&homeserver($cnum,$cdomain);
2526: my $normalid=$cdomain.'_'.$cnum;
2527: # need to always cache even if we get errors otherwise we keep
2528: # trying and trying and trying to get the course description.
2529: my %envhash=();
2530: my %returnhash=();
2531: $envhash{'course.'.$normalid.'.last_cache'}=time;
2532: if ($chome ne 'no_host') {
2533: %returnhash=&dump('environment',$cdomain,$cnum);
2534: if (!exists($returnhash{'con_lost'})) {
2535: $returnhash{'home'}= $chome;
2536: $returnhash{'domain'} = $cdomain;
2537: $returnhash{'num'} = $cnum;
2538: while (my ($name,$value) = each %returnhash) {
2539: $envhash{'course.'.$normalid.'.'.$name}=$value;
2540: }
2541: $returnhash{'url'}=&clutter($returnhash{'url'});
2542: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2543: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2544: $envhash{'course.'.$normalid.'.home'}=$chome;
2545: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2546: $envhash{'course.'.$normalid.'.num'}=$cnum;
2547: }
2548: }
2549: &appenv(%envhash);
2550: return %returnhash;
2551: }
2552:
2553: # -------------------------------------------------See if a user is privileged
2554:
2555: sub privileged {
2556: my ($username,$domain)=@_;
2557: my $rolesdump=&reply("dump:$domain:$username:roles",
2558: &homeserver($username,$domain));
2559: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2560: my $now=time;
2561: if ($rolesdump ne '') {
2562: foreach (split(/&/,$rolesdump)) {
2563: if ($_!~/^rolesdef_/) {
2564: my ($area,$role)=split(/=/,$_);
2565: $area=~s/\_\w\w$//;
2566: my ($trole,$tend,$tstart)=split(/_/,$role);
2567: if (($trole eq 'dc') || ($trole eq 'su')) {
2568: my $active=1;
2569: if ($tend) {
2570: if ($tend<$now) { $active=0; }
2571: }
2572: if ($tstart) {
2573: if ($tstart>$now) { $active=0; }
2574: }
2575: if ($active) { return 1; }
2576: }
2577: }
2578: }
2579: }
2580: return 0;
2581: }
2582:
2583: # -------------------------------------------------------- Get user privileges
2584:
2585: sub rolesinit {
2586: my ($domain,$username,$authhost)=@_;
2587: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2588: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2589: my %allroles=();
2590: my %allgroups=();
2591: my $now=time;
2592: my $userroles="user.login.time=$now\n";
2593: my $group_privs;
2594:
2595: if ($rolesdump ne '') {
2596: foreach (split(/&/,$rolesdump)) {
2597: if ($_!~/^rolesdef_/) {
2598: my ($area,$role)=split(/=/,$_);
2599: $area=~s/\_\w\w$//;
2600: my ($trole,$tend,$tstart,$group_privs);
2601: if ($role=~/^cr/) {
2602: if ($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|) {
2603: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2604: ($tend,$tstart)=split('_',$trest);
2605: } else {
2606: $trole=$role;
2607: }
2608: } elsif ($role =~ m|^gr/|) {
2609: ($trole,$tend,$tstart) = split(/_/,$role);
2610: ($trole,$group_privs) = split(/\//,$trole);
2611: $group_privs = &unescape($group_privs);
2612: } else {
2613: ($trole,$tend,$tstart)=split(/_/,$role);
2614: }
2615: $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username);
2616: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2617: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2618: if (($area ne '') && ($trole ne '')) {
2619: my $spec=$trole.'.'.$area;
2620: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2621: if ($trole =~ /^cr\//) {
2622: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2623: } elsif ($trole eq 'gr') {
2624: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
2625: } else {
2626: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2627: }
2628: }
2629: }
2630: }
2631: my ($author,$adv) = &set_userprivs(\$userroles,\%allroles,\%allgroups);
2632: $userroles.='user.adv='.$adv."\n".
2633: 'user.author='.$author."\n";
2634: $env{'user.adv'}=$adv;
2635: }
2636: return $userroles;
2637: }
2638:
2639: sub set_arearole {
2640: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2641: # log the associated role with the area
2642: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2643: return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
2644: }
2645:
2646: sub custom_roleprivs {
2647: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2648: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2649: my $homsvr=homeserver($rauthor,$rdomain);
2650: if ($hostname{$homsvr} ne '') {
2651: my ($rdummy,$roledef)=
2652: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2653: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2654: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2655: if (defined($syspriv)) {
2656: $$allroles{'cm./'}.=':'.$syspriv;
2657: $$allroles{$spec.'./'}.=':'.$syspriv;
2658: }
2659: if ($tdomain ne '') {
2660: if (defined($dompriv)) {
2661: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2662: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2663: }
2664: if (($trest ne '') && (defined($coursepriv))) {
2665: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2666: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2667: }
2668: }
2669: }
2670: }
2671: }
2672:
2673: sub group_roleprivs {
2674: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
2675: my $access = 1;
2676: my $now = time;
2677: if (($tend!=0) && ($tend<$now)) { $access = 0; }
2678: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
2679: if ($access) {
2680: my ($course,$group) = ($area =~ m|(/\w+/\w+)/([^/]+)$|);
2681: $$allgroups{$course}{$group} .=':'.$group_privs;
2682: }
2683: }
2684:
2685: sub standard_roleprivs {
2686: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2687: if (defined($pr{$trole.':s'})) {
2688: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2689: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2690: }
2691: if ($tdomain ne '') {
2692: if (defined($pr{$trole.':d'})) {
2693: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2694: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2695: }
2696: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2697: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2698: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2699: }
2700: }
2701: }
2702:
2703: sub set_userprivs {
2704: my ($userroles,$allroles,$allgroups) = @_;
2705: my $author=0;
2706: my $adv=0;
2707: my %grouproles = ();
2708: if (keys(%{$allgroups}) > 0) {
2709: foreach my $role (keys %{$allroles}) {
2710: my ($trole,$area,$sec,$extendedarea);
2711: if ($role =~ m|^(\w+)\.(/\w+/\w+)(/?\w*)|) {
2712: $trole = $1;
2713: $area = $2;
2714: $sec = $3;
2715: $extendedarea = $area.$sec;
2716: if (exists($$allgroups{$area})) {
2717: foreach my $group (keys(%{$$allgroups{$area}})) {
2718: my $spec = $trole.'.'.$extendedarea;
2719: $grouproles{$spec.'.'.$area.'/'.$group} =
2720: $$allgroups{$area}{$group};
2721: }
2722: }
2723: }
2724: }
2725: }
2726: foreach (keys(%grouproles)) {
2727: $$allroles{$_} = $grouproles{$_};
2728: }
2729: foreach (keys %{$allroles}) {
2730: my %thesepriv=();
2731: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2732: foreach (split(/:/,$$allroles{$_})) {
2733: if ($_ ne '') {
2734: my ($privilege,$restrictions)=split(/&/,$_);
2735: if ($restrictions eq '') {
2736: $thesepriv{$privilege}='F';
2737: } elsif ($thesepriv{$privilege} ne 'F') {
2738: $thesepriv{$privilege}.=$restrictions;
2739: }
2740: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2741: }
2742: }
2743: my $thesestr='';
2744: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2745: $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
2746: }
2747: return ($author,$adv);
2748: }
2749:
2750: # --------------------------------------------------------------- get interface
2751:
2752: sub get {
2753: my ($namespace,$storearr,$udomain,$uname)=@_;
2754: my $items='';
2755: foreach (@$storearr) {
2756: $items.=escape($_).'&';
2757: }
2758: $items=~s/\&$//;
2759: if (!$udomain) { $udomain=$env{'user.domain'}; }
2760: if (!$uname) { $uname=$env{'user.name'}; }
2761: my $uhome=&homeserver($uname,$udomain);
2762:
2763: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2764: my @pairs=split(/\&/,$rep);
2765: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2766: return @pairs;
2767: }
2768: my %returnhash=();
2769: my $i=0;
2770: foreach (@$storearr) {
2771: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2772: $i++;
2773: }
2774: return %returnhash;
2775: }
2776:
2777: # --------------------------------------------------------------- del interface
2778:
2779: sub del {
2780: my ($namespace,$storearr,$udomain,$uname)=@_;
2781: my $items='';
2782: foreach (@$storearr) {
2783: $items.=escape($_).'&';
2784: }
2785: $items=~s/\&$//;
2786: if (!$udomain) { $udomain=$env{'user.domain'}; }
2787: if (!$uname) { $uname=$env{'user.name'}; }
2788: my $uhome=&homeserver($uname,$udomain);
2789:
2790: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2791: }
2792:
2793: # -------------------------------------------------------------- dump interface
2794:
2795: sub dump {
2796: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2797: if (!$udomain) { $udomain=$env{'user.domain'}; }
2798: if (!$uname) { $uname=$env{'user.name'}; }
2799: my $uhome=&homeserver($uname,$udomain);
2800: if ($regexp) {
2801: $regexp=&escape($regexp);
2802: } else {
2803: $regexp='.';
2804: }
2805: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
2806: my @pairs=split(/\&/,$rep);
2807: my %returnhash=();
2808: foreach (@pairs) {
2809: my ($key,$value)=split(/=/,$_,2);
2810: $returnhash{unescape($key)}=&thaw_unescape($value);
2811: }
2812: return %returnhash;
2813: }
2814:
2815: # -------------------------------------------------------------- keys interface
2816:
2817: sub getkeys {
2818: my ($namespace,$udomain,$uname)=@_;
2819: if (!$udomain) { $udomain=$env{'user.domain'}; }
2820: if (!$uname) { $uname=$env{'user.name'}; }
2821: my $uhome=&homeserver($uname,$udomain);
2822: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2823: my @keyarray=();
2824: foreach (split(/\&/,$rep)) {
2825: push (@keyarray,&unescape($_));
2826: }
2827: return @keyarray;
2828: }
2829:
2830: # --------------------------------------------------------------- currentdump
2831: sub currentdump {
2832: my ($courseid,$sdom,$sname)=@_;
2833: $courseid = $env{'request.course.id'} if (! defined($courseid));
2834: $sdom = $env{'user.domain'} if (! defined($sdom));
2835: $sname = $env{'user.name'} if (! defined($sname));
2836: my $uhome = &homeserver($sname,$sdom);
2837: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2838: return if ($rep =~ /^(error:|no_such_host)/);
2839: #
2840: my %returnhash=();
2841: #
2842: if ($rep eq "unknown_cmd") {
2843: # an old lond will not know currentdump
2844: # Do a dump and make it look like a currentdump
2845: my @tmp = &dump($courseid,$sdom,$sname,'.');
2846: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2847: my %hash = @tmp;
2848: @tmp=();
2849: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2850: } else {
2851: my @pairs=split(/\&/,$rep);
2852: foreach (@pairs) {
2853: my ($key,$value)=split(/=/,$_);
2854: my ($symb,$param) = split(/:/,$key);
2855: $returnhash{&unescape($symb)}->{&unescape($param)} =
2856: &thaw_unescape($value);
2857: }
2858: }
2859: return %returnhash;
2860: }
2861:
2862: sub convert_dump_to_currentdump{
2863: my %hash = %{shift()};
2864: my %returnhash;
2865: # Code ripped from lond, essentially. The only difference
2866: # here is the unescaping done by lonnet::dump(). Conceivably
2867: # we might run in to problems with parameter names =~ /^v\./
2868: while (my ($key,$value) = each(%hash)) {
2869: my ($v,$symb,$param) = split(/:/,$key);
2870: next if ($v eq 'version' || $symb eq 'keys');
2871: next if (exists($returnhash{$symb}) &&
2872: exists($returnhash{$symb}->{$param}) &&
2873: $returnhash{$symb}->{'v.'.$param} > $v);
2874: $returnhash{$symb}->{$param}=$value;
2875: $returnhash{$symb}->{'v.'.$param}=$v;
2876: }
2877: #
2878: # Remove all of the keys in the hashes which keep track of
2879: # the version of the parameter.
2880: while (my ($symb,$param_hash) = each(%returnhash)) {
2881: # use a foreach because we are going to delete from the hash.
2882: foreach my $key (keys(%$param_hash)) {
2883: delete($param_hash->{$key}) if ($key =~ /^v\./);
2884: }
2885: }
2886: return \%returnhash;
2887: }
2888:
2889: # ------------------------------------------------------ critical inc interface
2890:
2891: sub cinc {
2892: return &inc(@_,'critical');
2893: }
2894:
2895: # --------------------------------------------------------------- inc interface
2896:
2897: sub inc {
2898: my ($namespace,$store,$udomain,$uname,$critical) = @_;
2899: if (!$udomain) { $udomain=$env{'user.domain'}; }
2900: if (!$uname) { $uname=$env{'user.name'}; }
2901: my $uhome=&homeserver($uname,$udomain);
2902: my $items='';
2903: if (! ref($store)) {
2904: # got a single value, so use that instead
2905: $items = &escape($store).'=&';
2906: } elsif (ref($store) eq 'SCALAR') {
2907: $items = &escape($$store).'=&';
2908: } elsif (ref($store) eq 'ARRAY') {
2909: $items = join('=&',map {&escape($_);} @{$store});
2910: } elsif (ref($store) eq 'HASH') {
2911: while (my($key,$value) = each(%{$store})) {
2912: $items.= &escape($key).'='.&escape($value).'&';
2913: }
2914: }
2915: $items=~s/\&$//;
2916: if ($critical) {
2917: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
2918: } else {
2919: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2920: }
2921: }
2922:
2923: # --------------------------------------------------------------- put interface
2924:
2925: sub put {
2926: my ($namespace,$storehash,$udomain,$uname)=@_;
2927: if (!$udomain) { $udomain=$env{'user.domain'}; }
2928: if (!$uname) { $uname=$env{'user.name'}; }
2929: my $uhome=&homeserver($uname,$udomain);
2930: my $items='';
2931: foreach (keys %$storehash) {
2932: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2933: }
2934: $items=~s/\&$//;
2935: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2936: }
2937:
2938: # ------------------------------------------------------------ newput interface
2939:
2940: sub newput {
2941: my ($namespace,$storehash,$udomain,$uname)=@_;
2942: if (!$udomain) { $udomain=$env{'user.domain'}; }
2943: if (!$uname) { $uname=$env{'user.name'}; }
2944: my $uhome=&homeserver($uname,$udomain);
2945: my $items='';
2946: foreach my $key (keys(%$storehash)) {
2947: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
2948: }
2949: $items=~s/\&$//;
2950: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
2951: }
2952:
2953: # --------------------------------------------------------- putstore interface
2954:
2955: sub putstore {
2956: my ($namespace,$storehash,$udomain,$uname)=@_;
2957: if (!$udomain) { $udomain=$env{'user.domain'}; }
2958: if (!$uname) { $uname=$env{'user.name'}; }
2959: my $uhome=&homeserver($uname,$udomain);
2960: my $items='';
2961: my %allitems = ();
2962: foreach (keys %$storehash) {
2963: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
2964: my $key = $1.':keys:'.$2;
2965: $allitems{$key} .= $3.':';
2966: }
2967: $items.=$_.'='.&freeze_escape($$storehash{$_}).'&';
2968: }
2969: foreach (keys %allitems) {
2970: $allitems{$_} =~ s/\:$//;
2971: $items.= $_.'='.$allitems{$_}.'&';
2972: }
2973: $items=~s/\&$//;
2974: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2975: }
2976:
2977: # ------------------------------------------------------ critical put interface
2978:
2979: sub cput {
2980: my ($namespace,$storehash,$udomain,$uname)=@_;
2981: if (!$udomain) { $udomain=$env{'user.domain'}; }
2982: if (!$uname) { $uname=$env{'user.name'}; }
2983: my $uhome=&homeserver($uname,$udomain);
2984: my $items='';
2985: foreach (keys %$storehash) {
2986: $items.=escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2987: }
2988: $items=~s/\&$//;
2989: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2990: }
2991:
2992: # -------------------------------------------------------------- eget interface
2993:
2994: sub eget {
2995: my ($namespace,$storearr,$udomain,$uname)=@_;
2996: my $items='';
2997: foreach (@$storearr) {
2998: $items.=escape($_).'&';
2999: }
3000: $items=~s/\&$//;
3001: if (!$udomain) { $udomain=$env{'user.domain'}; }
3002: if (!$uname) { $uname=$env{'user.name'}; }
3003: my $uhome=&homeserver($uname,$udomain);
3004: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3005: my @pairs=split(/\&/,$rep);
3006: my %returnhash=();
3007: my $i=0;
3008: foreach (@$storearr) {
3009: $returnhash{$_}=&thaw_unescape($pairs[$i]);
3010: $i++;
3011: }
3012: return %returnhash;
3013: }
3014:
3015: # ------------------------------------------------------------ tmpput interface
3016: sub tmpput {
3017: my ($storehash,$server)=@_;
3018: my $items='';
3019: foreach (keys(%$storehash)) {
3020: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3021: }
3022: $items=~s/\&$//;
3023: return &reply("tmpput:$items",$server);
3024: }
3025:
3026: # ------------------------------------------------------------ tmpget interface
3027: sub tmpget {
3028: my ($token,$server)=@_;
3029: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3030: my $rep=&reply("tmpget:$token",$server);
3031: my %returnhash;
3032: foreach my $item (split(/\&/,$rep)) {
3033: my ($key,$value)=split(/=/,$item);
3034: $returnhash{&unescape($key)}=&thaw_unescape($value);
3035: }
3036: return %returnhash;
3037: }
3038:
3039: # ------------------------------------------------------------ tmpget interface
3040: sub tmpdel {
3041: my ($token,$server)=@_;
3042: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3043: return &reply("tmpdel:$token",$server);
3044: }
3045:
3046: # ---------------------------------------------- Custom access rule evaluation
3047:
3048: sub customaccess {
3049: my ($priv,$uri)=@_;
3050: my ($urole,$urealm)=split(/\./,$env{'request.role'});
3051: $urealm=~s/^\W//;
3052: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
3053: my $access=0;
3054: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
3055: my ($effect,$realm,$role)=split(/\:/,$_);
3056: if ($role) {
3057: if ($role ne $urole) { next; }
3058: }
3059: foreach (split(/\s*\,\s*/,$realm)) {
3060: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
3061: if ($tdom) {
3062: if ($tdom ne $udom) { next; }
3063: }
3064: if ($tcrs) {
3065: if ($tcrs ne $ucrs) { next; }
3066: }
3067: if ($tsec) {
3068: if ($tsec ne $usec) { next; }
3069: }
3070: $access=($effect eq 'allow');
3071: last;
3072: }
3073: if ($realm eq '' && $role eq '') {
3074: $access=($effect eq 'allow');
3075: }
3076: }
3077: return $access;
3078: }
3079:
3080: # ------------------------------------------------- Check for a user privilege
3081:
3082: sub allowed {
3083: my ($priv,$uri,$symb)=@_;
3084: $uri=&deversion($uri);
3085: my $orguri=$uri;
3086: $uri=&declutter($uri);
3087:
3088: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3089: # Free bre access to adm and meta resources
3090: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
3091: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
3092: return 'F';
3093: }
3094:
3095: # Free bre access to user's own portfolio contents
3096: my ($space,$domain,$name,$dir)=split('/',$uri);
3097: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3098: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
3099: return 'F';
3100: }
3101:
3102: # Free bre to public access
3103:
3104: if ($priv eq 'bre') {
3105: my $copyright=&metadata($uri,'copyright');
3106: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3107: return 'F';
3108: }
3109: if ($copyright eq 'priv') {
3110: $uri=~/([^\/]+)\/([^\/]+)\//;
3111: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3112: return '';
3113: }
3114: }
3115: if ($copyright eq 'domain') {
3116: $uri=~/([^\/]+)\/([^\/]+)\//;
3117: unless (($env{'user.domain'} eq $1) ||
3118: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3119: return '';
3120: }
3121: }
3122: if ($env{'request.role'}=~ /li\.\//) {
3123: # Library role, so allow browsing of resources in this domain.
3124: return 'F';
3125: }
3126: if ($copyright eq 'custom') {
3127: unless (&customaccess($priv,$uri)) { return ''; }
3128: }
3129: }
3130: # Domain coordinator is trying to create a course
3131: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3132: # uri is the requested domain in this case.
3133: # comparison to 'request.role.domain' shows if the user has selected
3134: # a role of dc for the domain in question.
3135: return 'F' if ($uri eq $env{'request.role.domain'});
3136: }
3137:
3138: my $thisallowed='';
3139: my $statecond=0;
3140: my $courseprivid='';
3141:
3142: # Course
3143:
3144: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3145: $thisallowed.=$1;
3146: }
3147:
3148: # Domain
3149:
3150: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3151: =~/\Q$priv\E\&([^\:]*)/) {
3152: $thisallowed.=$1;
3153: }
3154:
3155: # Course: uri itself is a course
3156: my $courseuri=$uri;
3157: $courseuri=~s/\_(\d)/\/$1/;
3158: $courseuri=~s/^([^\/])/\/$1/;
3159:
3160: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3161: =~/\Q$priv\E\&([^\:]*)/) {
3162: $thisallowed.=$1;
3163: }
3164:
3165: # Group: uri itself is a group
3166: my $groupuri=$uri;
3167: $groupuri=~s/^([^\/])/\/$1/;
3168: if ($env{'user.priv.'.$env{'request.role'}.'.'.$groupuri}
3169: =~/\Q$priv\E\&([^\:]*)/) {
3170: $thisallowed.=$1;
3171: }
3172:
3173: # URI is an uploaded document for this course, default permissions don't matter
3174: # not allowing 'edit' access (editupload) to uploaded course docs
3175: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3176: $thisallowed='';
3177: my ($match)=&is_on_map($uri);
3178: if ($match) {
3179: if ($env{'user.priv.'.$env{'request.role'}.'./'}
3180: =~/\Q$priv\E\&([^\:]*)/) {
3181: $thisallowed.=$1;
3182: }
3183: } else {
3184: my $refuri=$env{'httpref.'.$orguri};
3185: if ($refuri) {
3186: if ($refuri =~ m|^/adm/|) {
3187: $thisallowed='F';
3188: } else {
3189: $refuri=&declutter($refuri);
3190: my ($match) = &is_on_map($refuri);
3191: if ($match) {
3192: $thisallowed='F';
3193: }
3194: }
3195: }
3196: }
3197: }
3198:
3199: # Full access at system, domain or course-wide level? Exit.
3200:
3201: if ($thisallowed=~/F/) {
3202: return 'F';
3203: }
3204:
3205: # If this is generating or modifying users, exit with special codes
3206:
3207: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3208: if (($priv eq 'cca') || ($priv eq 'caa')) {
3209: my ($audom,$auname)=split('/',$uri);
3210: # no author name given, so this just checks on the general right to make a co-author in this domain
3211: unless ($auname) { return $thisallowed; }
3212: # an author name is given, so we are about to actually make a co-author for a certain account
3213: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3214: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3215: ($audom ne $env{'request.role.domain'}))) { return ''; }
3216: }
3217: return $thisallowed;
3218: }
3219: #
3220: # Gathered so far: system, domain and course wide privileges
3221: #
3222: # Course: See if uri or referer is an individual resource that is part of
3223: # the course
3224:
3225: if ($env{'request.course.id'}) {
3226:
3227: $courseprivid=$env{'request.course.id'};
3228: if ($env{'request.course.sec'}) {
3229: $courseprivid.='/'.$env{'request.course.sec'};
3230: }
3231: $courseprivid=~s/\_/\//;
3232: my $checkreferer=1;
3233: my ($match,$cond)=&is_on_map($uri);
3234: if ($match) {
3235: $statecond=$cond;
3236: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3237: =~/\Q$priv\E\&([^\:]*)/) {
3238: $thisallowed.=$1;
3239: $checkreferer=0;
3240: }
3241: }
3242:
3243: if ($checkreferer) {
3244: my $refuri=$env{'httpref.'.$orguri};
3245: unless ($refuri) {
3246: foreach (keys %env) {
3247: if ($_=~/^httpref\..*\*/) {
3248: my $pattern=$_;
3249: $pattern=~s/^httpref\.\/res\///;
3250: $pattern=~s/\*/\[\^\/\]\+/g;
3251: $pattern=~s/\//\\\//g;
3252: if ($orguri=~/$pattern/) {
3253: $refuri=$env{$_};
3254: }
3255: }
3256: }
3257: }
3258:
3259: if ($refuri) {
3260: $refuri=&declutter($refuri);
3261: my ($match,$cond)=&is_on_map($refuri);
3262: if ($match) {
3263: my $refstatecond=$cond;
3264: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3265: =~/\Q$priv\E\&([^\:]*)/) {
3266: $thisallowed.=$1;
3267: $uri=$refuri;
3268: $statecond=$refstatecond;
3269: }
3270: }
3271: }
3272: }
3273: }
3274:
3275: #
3276: # Gathered now: all privileges that could apply, and condition number
3277: #
3278: #
3279: # Full or no access?
3280: #
3281:
3282: if ($thisallowed=~/F/) {
3283: return 'F';
3284: }
3285:
3286: unless ($thisallowed) {
3287: return '';
3288: }
3289:
3290: # Restrictions exist, deal with them
3291: #
3292: # C:according to course preferences
3293: # R:according to resource settings
3294: # L:unless locked
3295: # X:according to user session state
3296: #
3297:
3298: # Possibly locked functionality, check all courses
3299: # Locks might take effect only after 10 minutes cache expiration for other
3300: # courses, and 2 minutes for current course
3301:
3302: my $envkey;
3303: if ($thisallowed=~/L/) {
3304: foreach $envkey (keys %env) {
3305: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3306: my $courseid=$2;
3307: my $roleid=$1.'.'.$2;
3308: $courseid=~s/^\///;
3309: my $expiretime=600;
3310: if ($env{'request.role'} eq $roleid) {
3311: $expiretime=120;
3312: }
3313: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3314: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3315: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3316: &coursedescription($courseid);
3317: }
3318: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3319: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3320: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3321: &log($env{'user.domain'},$env{'user.name'},
3322: $env{'user.home'},
3323: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3324: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3325: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3326: return '';
3327: }
3328: }
3329: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3330: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3331: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3332: &log($env{'user.domain'},$env{'user.name'},
3333: $env{'user.home'},
3334: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3335: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3336: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3337: return '';
3338: }
3339: }
3340: }
3341: }
3342: }
3343:
3344: #
3345: # Rest of the restrictions depend on selected course
3346: #
3347:
3348: unless ($env{'request.course.id'}) {
3349: return '1';
3350: }
3351:
3352: #
3353: # Now user is definitely in a course
3354: #
3355:
3356:
3357: # Course preferences
3358:
3359: if ($thisallowed=~/C/) {
3360: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3361: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
3362: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
3363: =~/\Q$rolecode\E/) {
3364: if ($priv ne 'pch') {
3365: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3366: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3367: $env{'request.course.id'});
3368: }
3369: return '';
3370: }
3371:
3372: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
3373: =~/\Q$unamedom\E/) {
3374: if ($priv ne 'pch') {
3375: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
3376: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3377: $env{'request.course.id'});
3378: }
3379: return '';
3380: }
3381: }
3382:
3383: # Resource preferences
3384:
3385: if ($thisallowed=~/R/) {
3386: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3387: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3388: if ($priv ne 'pch') {
3389: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3390: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3391: }
3392: return '';
3393: }
3394: }
3395:
3396: # Restricted by state or randomout?
3397:
3398: if ($thisallowed=~/X/) {
3399: if ($env{'acc.randomout'}) {
3400: if (!$symb) { $symb=&symbread($uri,1); }
3401: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3402: return '';
3403: }
3404: }
3405: if (&condval($statecond)) {
3406: return '2';
3407: } else {
3408: return '';
3409: }
3410: }
3411:
3412: return 'F';
3413: }
3414:
3415: # --------------------------------------------------- Is a resource on the map?
3416:
3417: sub is_on_map {
3418: my $uri=&deversion(&declutter(shift));
3419: my @uriparts=split(/\//,$uri);
3420: my $filename=$uriparts[$#uriparts];
3421: my $pathname=$uri;
3422: $pathname=~s|/\Q$filename\E$||;
3423: $pathname=~s/^adm\/wrapper\///;
3424: $pathname=~s/^adm\/coursedocs\/showdoc\///;
3425: #Trying to find the conditional for the file
3426: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3427: /\&\Q$filename\E\:([\d\|]+)\&/);
3428: if ($match) {
3429: return (1,$1);
3430: } else {
3431: return (0,0);
3432: }
3433: }
3434:
3435: # --------------------------------------------------------- Get symb from alias
3436:
3437: sub get_symb_from_alias {
3438: my $symb=shift;
3439: my ($map,$resid,$url)=&decode_symb($symb);
3440: # Already is a symb
3441: if ($url) { return $symb; }
3442: # Must be an alias
3443: my $aliassymb='';
3444: my %bighash;
3445: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
3446: &GDBM_READER(),0640)) {
3447: my $rid=$bighash{'mapalias_'.$symb};
3448: if ($rid) {
3449: my ($mapid,$resid)=split(/\./,$rid);
3450: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3451: $resid,$bighash{'src_'.$rid});
3452: }
3453: untie %bighash;
3454: }
3455: return $aliassymb;
3456: }
3457:
3458: # ----------------------------------------------------------------- Define Role
3459:
3460: sub definerole {
3461: if (allowed('mcr','/')) {
3462: my ($rolename,$sysrole,$domrole,$courole)=@_;
3463: foreach (split(':',$sysrole)) {
3464: my ($crole,$cqual)=split(/\&/,$_);
3465: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3466: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3467: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3468: return "refused:s:$crole&$cqual";
3469: }
3470: }
3471: }
3472: foreach (split(':',$domrole)) {
3473: my ($crole,$cqual)=split(/\&/,$_);
3474: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3475: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3476: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3477: return "refused:d:$crole&$cqual";
3478: }
3479: }
3480: }
3481: foreach (split(':',$courole)) {
3482: my ($crole,$cqual)=split(/\&/,$_);
3483: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3484: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3485: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3486: return "refused:c:$crole&$cqual";
3487: }
3488: }
3489: }
3490: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3491: "$env{'user.domain'}:$env{'user.name'}:".
3492: "rolesdef_$rolename=".
3493: escape($sysrole.'_'.$domrole.'_'.$courole);
3494: return reply($command,$env{'user.home'});
3495: } else {
3496: return 'refused';
3497: }
3498: }
3499:
3500: # ---------------- Make a metadata query against the network of library servers
3501:
3502: sub metadata_query {
3503: my ($query,$custom,$customshow,$server_array)=@_;
3504: my %rhash;
3505: my @server_list = (defined($server_array) ? @$server_array
3506: : keys(%libserv) );
3507: for my $server (@server_list) {
3508: unless ($custom or $customshow) {
3509: my $reply=&reply("querysend:".&escape($query),$server);
3510: $rhash{$server}=$reply;
3511: }
3512: else {
3513: my $reply=&reply("querysend:".&escape($query).':'.
3514: &escape($custom).':'.&escape($customshow),
3515: $server);
3516: $rhash{$server}=$reply;
3517: }
3518: }
3519: return \%rhash;
3520: }
3521:
3522: # ----------------------------------------- Send log queries and wait for reply
3523:
3524: sub log_query {
3525: my ($uname,$udom,$query,%filters)=@_;
3526: my $uhome=&homeserver($uname,$udom);
3527: if ($uhome eq 'no_host') { return 'error: no_host'; }
3528: my $uhost=$hostname{$uhome};
3529: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3530: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3531: $uhome);
3532: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3533: return get_query_reply($queryid);
3534: }
3535:
3536: # ------- Request retrieval of institutional classlists for course(s)
3537:
3538: sub fetch_enrollment_query {
3539: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3540: my $homeserver;
3541: my $maxtries = 1;
3542: if ($context eq 'automated') {
3543: $homeserver = $perlvar{'lonHostID'};
3544: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3545: } else {
3546: $homeserver = &homeserver($cnum,$dom);
3547: }
3548: my $host=$hostname{$homeserver};
3549: my $cmd = '';
3550: foreach (keys %{$affiliatesref}) {
3551: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3552: }
3553: $cmd =~ s/%%$//;
3554: $cmd = &escape($cmd);
3555: my $query = 'fetchenrollment';
3556: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
3557: unless ($queryid=~/^\Q$host\E\_/) {
3558: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3559: return 'error: '.$queryid;
3560: }
3561: my $reply = &get_query_reply($queryid);
3562: my $tries = 1;
3563: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3564: $reply = &get_query_reply($queryid);
3565: $tries ++;
3566: }
3567: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3568: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3569: } else {
3570: my @responses = split/:/,$reply;
3571: if ($homeserver eq $perlvar{'lonHostID'}) {
3572: foreach (@responses) {
3573: my ($key,$value) = split/=/,$_;
3574: $$replyref{$key} = $value;
3575: }
3576: } else {
3577: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3578: foreach (@responses) {
3579: my ($key,$value) = split/=/,$_;
3580: $$replyref{$key} = $value;
3581: if ($value > 0) {
3582: foreach (@{$$affiliatesref{$key}}) {
3583: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3584: my $destname = $pathname.'/'.$filename;
3585: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3586: if ($xml_classlist =~ /^error/) {
3587: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3588: } else {
3589: if ( open(FILE,">$destname") ) {
3590: print FILE &unescape($xml_classlist);
3591: close(FILE);
3592: } else {
3593: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3594: }
3595: }
3596: }
3597: }
3598: }
3599: }
3600: return 'ok';
3601: }
3602: return 'error';
3603: }
3604:
3605: sub get_query_reply {
3606: my $queryid=shift;
3607: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3608: my $reply='';
3609: for (1..100) {
3610: sleep 2;
3611: if (-e $replyfile.'.end') {
3612: if (open(my $fh,$replyfile)) {
3613: $reply.=<$fh>;
3614: close($fh);
3615: } else { return 'error: reply_file_error'; }
3616: return &unescape($reply);
3617: }
3618: }
3619: return 'timeout:'.$queryid;
3620: }
3621:
3622: sub courselog_query {
3623: #
3624: # possible filters:
3625: # url: url or symb
3626: # username
3627: # domain
3628: # action: view, submit, grade
3629: # start: timestamp
3630: # end: timestamp
3631: #
3632: my (%filters)=@_;
3633: unless ($env{'request.course.id'}) { return 'no_course'; }
3634: if ($filters{'url'}) {
3635: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3636: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3637: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3638: }
3639: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
3640: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
3641: return &log_query($cname,$cdom,'courselog',%filters);
3642: }
3643:
3644: sub userlog_query {
3645: my ($uname,$udom,%filters)=@_;
3646: return &log_query($uname,$udom,'userlog',%filters);
3647: }
3648:
3649: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3650:
3651: sub auto_run {
3652: my ($cnum,$cdom) = @_;
3653: my $homeserver = &homeserver($cnum,$cdom);
3654: my $response = &reply('autorun:'.$cdom,$homeserver);
3655: return $response;
3656: }
3657:
3658: sub auto_get_sections {
3659: my ($cnum,$cdom,$inst_coursecode) = @_;
3660: my $homeserver = &homeserver($cnum,$cdom);
3661: my @secs = ();
3662: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3663: unless ($response eq 'refused') {
3664: @secs = split/:/,$response;
3665: }
3666: return @secs;
3667: }
3668:
3669: sub auto_new_course {
3670: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3671: my $homeserver = &homeserver($cnum,$cdom);
3672: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3673: return $response;
3674: }
3675:
3676: sub auto_validate_courseID {
3677: my ($cnum,$cdom,$inst_course_id) = @_;
3678: my $homeserver = &homeserver($cnum,$cdom);
3679: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3680: return $response;
3681: }
3682:
3683: sub auto_create_password {
3684: my ($cnum,$cdom,$authparam) = @_;
3685: my $homeserver = &homeserver($cnum,$cdom);
3686: my $create_passwd = 0;
3687: my $authchk = '';
3688: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3689: if ($response eq 'refused') {
3690: $authchk = 'refused';
3691: } else {
3692: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3693: }
3694: return ($authparam,$create_passwd,$authchk);
3695: }
3696:
3697: sub auto_instcode_format {
3698: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3699: my $courses = '';
3700: my $homeserver;
3701: if ($caller eq 'global') {
3702: foreach my $tryserver (keys %libserv) {
3703: if ($hostdom{$tryserver} eq $codedom) {
3704: $homeserver = $tryserver;
3705: last;
3706: }
3707: }
3708: if (($env{'user.name'}) && ($env{'user.domain'} eq $codedom)) {
3709: $homeserver = &homeserver($env{'user.name'},$codedom);
3710: }
3711: } else {
3712: $homeserver = &homeserver($caller,$codedom);
3713: }
3714: foreach (keys %{$instcodes}) {
3715: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3716: }
3717: chop($courses);
3718: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3719: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3720: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3721: %{$codes} = &str2hash($codes_str);
3722: @{$codetitles} = &str2array($codetitles_str);
3723: %{$cat_titles} = &str2hash($cat_titles_str);
3724: %{$cat_order} = &str2hash($cat_order_str);
3725: return 'ok';
3726: }
3727: return $response;
3728: }
3729:
3730: # ------------------------------------------------------- Course Group routines
3731:
3732: sub get_coursegroups {
3733: my ($cdom,$cnum,$group) = @_;
3734: return(&dump('coursegroups',$cdom,$cnum,$group));
3735: }
3736:
3737: sub modify_coursegroup {
3738: my ($cdom,$cnum,$groupsettings) = @_;
3739: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
3740: }
3741:
3742: sub modify_group_roles {
3743: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
3744: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
3745: my $role = 'gr/'.&escape($userprivs);
3746: my ($uname,$udom) = split(/:/,$user);
3747: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
3748: if ($result eq 'ok') {
3749: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
3750: }
3751:
3752: return $result;
3753: }
3754:
3755: sub modify_coursegroup_membership {
3756: my ($cdom,$cnum,$membership) = @_;
3757: my $result = &put('groupmembership',$membership,$cdom,$cnum);
3758: return $result;
3759: }
3760:
3761: sub get_active_groups {
3762: my ($udom,$uname,$cdom,$cnum) = @_;
3763: my $now = time;
3764: my %groups = ();
3765: foreach my $key (keys(%env)) {
3766: if ($key =~ m-user\.role\.gr\./([^/]+)/([^/]+)/(\w+)$-) {
3767: my ($start,$end) = split(/\./,$env{$key});
3768: if (($end!=0) && ($end<$now)) { next; }
3769: if (($start!=0) && ($start>$now)) { next; }
3770: if ($1 eq $cdom && $2 eq $cnum) {
3771: $groups{$3} = $env{$key} ;
3772: }
3773: }
3774: }
3775: return %groups;
3776: }
3777:
3778: sub get_group_membership {
3779: my ($cdom,$cnum,$group) = @_;
3780: return(&dump('groupmembership',$cdom,$cnum,$group));
3781: }
3782:
3783: sub get_users_groups {
3784: my ($udom,$uname,$courseid) = @_;
3785: my $cachetime=1800;
3786: $courseid=~s/\_/\//g;
3787: $courseid=~s/^(\w)/\/$1/;
3788:
3789: my $hashid="$udom:$uname:$courseid";
3790: my ($result,$cached)=&is_cached_new('getgroups',$hashid);
3791: if (defined($cached)) { return $result; }
3792:
3793: my %roleshash = &dump('roles',$udom,$uname,$courseid);
3794: my ($tmp) = keys(%roleshash);
3795: if ($tmp=~/^error:/) {
3796: &logthis('Error retrieving roles: '.$tmp.' for '.$uname.':'.$udom);
3797: return '';
3798: } else {
3799: my $grouplist;
3800: foreach my $key (keys %roleshash) {
3801: if ($key =~ /^\Q$courseid\E\/(\w+)\_gr$/) {
3802: unless ($roleshash{$key} =~ /_1_1$/) { # deleted membership
3803: $grouplist .= $1.':';
3804: }
3805: }
3806: }
3807: $grouplist =~ s/:$//;
3808: return &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
3809: }
3810: }
3811:
3812: sub devalidate_getgroups_cache {
3813: my ($udom,$uname,$cdom,$cnum)=@_;
3814: my $courseid = $cdom.'_'.$cnum;
3815: $courseid=~s/\_/\//g;
3816: $courseid=~s/^(\w)/\/$1/;
3817: my $hashid="$udom:$uname:$courseid";
3818: &devalidate_cache_new('getgroups',$hashid);
3819: }
3820:
3821: # ------------------------------------------------------------------ Plain Text
3822:
3823: sub plaintext {
3824: my $short=shift;
3825: return &Apache::lonlocal::mt($prp{$short});
3826: }
3827:
3828: # ----------------------------------------------------------------- Assign Role
3829:
3830: sub assignrole {
3831: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3832: my $mrole;
3833: if ($role =~ /^cr\//) {
3834: my $cwosec=$url;
3835: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3836: unless (&allowed('ccr',$cwosec)) {
3837: &logthis('Refused custom assignrole: '.
3838: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3839: $env{'user.name'}.' at '.$env{'user.domain'});
3840: return 'refused';
3841: }
3842: $mrole='cr';
3843: } elsif ($role =~ /^gr\//) {
3844: my $cwogrp=$url;
3845: $cwogrp=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3846: unless (&allowed('mdg',$cwogrp)) {
3847: &logthis('Refused group assignrole: '.
3848: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3849: $env{'user.name'}.' at '.$env{'user.domain'});
3850: return 'refused';
3851: }
3852: $mrole='gr';
3853: } else {
3854: my $cwosec=$url;
3855: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3856: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3857: &logthis('Refused assignrole: '.
3858: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3859: $env{'user.name'}.' at '.$env{'user.domain'});
3860: return 'refused';
3861: }
3862: $mrole=$role;
3863: }
3864: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3865: "$udom:$uname:$url".'_'."$mrole=$role";
3866: if ($end) { $command.='_'.$end; }
3867: if ($start) {
3868: if ($end) {
3869: $command.='_'.$start;
3870: } else {
3871: $command.='_0_'.$start;
3872: }
3873: }
3874: # actually delete
3875: if ($deleteflag) {
3876: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3877: # modify command to delete the role
3878: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
3879: "$udom:$uname:$url".'_'."$mrole";
3880: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
3881: # set start and finish to negative values for userrolelog
3882: $start=-1;
3883: $end=-1;
3884: }
3885: }
3886: # send command
3887: my $answer=&reply($command,&homeserver($uname,$udom));
3888: # log new user role if status is ok
3889: if ($answer eq 'ok') {
3890: &userrolelog($role,$uname,$udom,$url,$start,$end);
3891: }
3892: return $answer;
3893: }
3894:
3895: # -------------------------------------------------- Modify user authentication
3896: # Overrides without validation
3897:
3898: sub modifyuserauth {
3899: my ($udom,$uname,$umode,$upass)=@_;
3900: my $uhome=&homeserver($uname,$udom);
3901: unless (&allowed('mau',$udom)) { return 'refused'; }
3902: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3903: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
3904: ' in domain '.$env{'request.role.domain'});
3905: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3906: &escape($upass),$uhome);
3907: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
3908: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3909: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3910: &log($udom,,$uname,$uhome,
3911: 'Authentication changed by '.$env{'user.domain'}.', '.
3912: $env{'user.name'}.', '.$umode.
3913: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3914: unless ($reply eq 'ok') {
3915: &logthis('Authentication mode error: '.$reply);
3916: return 'error: '.$reply;
3917: }
3918: return 'ok';
3919: }
3920:
3921: # --------------------------------------------------------------- Modify a user
3922:
3923: sub modifyuser {
3924: my ($udom, $uname, $uid,
3925: $umode, $upass, $first,
3926: $middle, $last, $gene,
3927: $forceid, $desiredhome, $email)=@_;
3928: $udom=~s/\W//g;
3929: $uname=~s/\W//g;
3930: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3931: $umode.', '.$first.', '.$middle.', '.
3932: $last.', '.$gene.'(forceid: '.$forceid.')'.
3933: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3934: ' desiredhome not specified').
3935: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
3936: ' in domain '.$env{'request.role.domain'});
3937: my $uhome=&homeserver($uname,$udom,'true');
3938: # ----------------------------------------------------------------- Create User
3939: if (($uhome eq 'no_host') &&
3940: (($umode && $upass) || ($umode eq 'localauth'))) {
3941: my $unhome='';
3942: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3943: $unhome = $desiredhome;
3944: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
3945: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
3946: } else { # load balancing routine for determining $unhome
3947: my $tryserver;
3948: my $loadm=10000000;
3949: foreach $tryserver (keys %libserv) {
3950: if ($hostdom{$tryserver} eq $udom) {
3951: my $answer=reply('load',$tryserver);
3952: if (($answer=~/\d+/) && ($answer<$loadm)) {
3953: $loadm=$answer;
3954: $unhome=$tryserver;
3955: }
3956: }
3957: }
3958: }
3959: if (($unhome eq '') || ($unhome eq 'no_host')) {
3960: return 'error: unable to find a home server for '.$uname.
3961: ' in domain '.$udom;
3962: }
3963: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3964: &escape($upass),$unhome);
3965: unless ($reply eq 'ok') {
3966: return 'error: '.$reply;
3967: }
3968: $uhome=&homeserver($uname,$udom,'true');
3969: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3970: return 'error: unable verify users home machine.';
3971: }
3972: } # End of creation of new user
3973: # ---------------------------------------------------------------------- Add ID
3974: if ($uid) {
3975: $uid=~tr/A-Z/a-z/;
3976: my %uidhash=&idrget($udom,$uname);
3977: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3978: && (!$forceid)) {
3979: unless ($uid eq $uidhash{$uname}) {
3980: return 'error: user id "'.$uid.'" does not match '.
3981: 'current user id "'.$uidhash{$uname}.'".';
3982: }
3983: } else {
3984: &idput($udom,($uname => $uid));
3985: }
3986: }
3987: # -------------------------------------------------------------- Add names, etc
3988: my @tmp=&get('environment',
3989: ['firstname','middlename','lastname','generation'],
3990: $udom,$uname);
3991: my %names;
3992: if ($tmp[0] =~ m/^error:.*/) {
3993: %names=();
3994: } else {
3995: %names = @tmp;
3996: }
3997: #
3998: # Make sure to not trash student environment if instructor does not bother
3999: # to supply name and email information
4000: #
4001: if ($first) { $names{'firstname'} = $first; }
4002: if (defined($middle)) { $names{'middlename'} = $middle; }
4003: if ($last) { $names{'lastname'} = $last; }
4004: if (defined($gene)) { $names{'generation'} = $gene; }
4005: if ($email) {
4006: $email=~s/[^\w\@\.\-\,]//gs;
4007: if ($email=~/\@/) { $names{'notification'} = $email;
4008: $names{'critnotification'} = $email;
4009: $names{'permanentemail'} = $email; }
4010: }
4011: my $reply = &put('environment', \%names, $udom,$uname);
4012: if ($reply ne 'ok') { return 'error: '.$reply; }
4013: &devalidate_cache_new('namescache',$uname.':'.$udom);
4014: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
4015: $umode.', '.$first.', '.$middle.', '.
4016: $last.', '.$gene.' by '.
4017: $env{'user.name'}.' at '.$env{'user.domain'});
4018: return 'ok';
4019: }
4020:
4021: # -------------------------------------------------------------- Modify student
4022:
4023: sub modifystudent {
4024: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
4025: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
4026: if (!$cid) {
4027: unless ($cid=$env{'request.course.id'}) {
4028: return 'not_in_class';
4029: }
4030: }
4031: # --------------------------------------------------------------- Make the user
4032: my $reply=&modifyuser
4033: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
4034: $desiredhome,$email);
4035: unless ($reply eq 'ok') { return $reply; }
4036: # This will cause &modify_student_enrollment to get the uid from the
4037: # students environment
4038: $uid = undef if (!$forceid);
4039: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
4040: $gene,$usec,$end,$start,$type,$locktype,$cid);
4041: return $reply;
4042: }
4043:
4044: sub modify_student_enrollment {
4045: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
4046: my ($cdom,$cnum,$chome);
4047: if (!$cid) {
4048: unless ($cid=$env{'request.course.id'}) {
4049: return 'not_in_class';
4050: }
4051: $cdom=$env{'course.'.$cid.'.domain'};
4052: $cnum=$env{'course.'.$cid.'.num'};
4053: } else {
4054: ($cdom,$cnum)=split(/_/,$cid);
4055: }
4056: $chome=$env{'course.'.$cid.'.home'};
4057: if (!$chome) {
4058: $chome=&homeserver($cnum,$cdom);
4059: }
4060: if (!$chome) { return 'unknown_course'; }
4061: # Make sure the user exists
4062: my $uhome=&homeserver($uname,$udom);
4063: if (($uhome eq '') || ($uhome eq 'no_host')) {
4064: return 'error: no such user';
4065: }
4066: # Get student data if we were not given enough information
4067: if (!defined($first) || $first eq '' ||
4068: !defined($last) || $last eq '' ||
4069: !defined($uid) || $uid eq '' ||
4070: !defined($middle) || $middle eq '' ||
4071: !defined($gene) || $gene eq '') {
4072: # They did not supply us with enough data to enroll the student, so
4073: # we need to pick up more information.
4074: my %tmp = &get('environment',
4075: ['firstname','middlename','lastname', 'generation','id']
4076: ,$udom,$uname);
4077:
4078: #foreach (keys(%tmp)) {
4079: # &logthis("key $_ = ".$tmp{$_});
4080: #}
4081: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
4082: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
4083: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
4084: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
4085: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
4086: }
4087: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
4088: my $reply=cput('classlist',
4089: {"$uname:$udom" =>
4090: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
4091: $cdom,$cnum);
4092: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
4093: return 'error: '.$reply;
4094: } else {
4095: &devalidate_getsection_cache($udom,$uname,$cid);
4096: }
4097: # Add student role to user
4098: my $uurl='/'.$cid;
4099: $uurl=~s/\_/\//g;
4100: if ($usec) {
4101: $uurl.='/'.$usec;
4102: }
4103: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
4104: }
4105:
4106: sub format_name {
4107: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
4108: my $name;
4109: if ($first ne 'lastname') {
4110: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
4111: } else {
4112: if ($lastname=~/\S/) {
4113: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
4114: $name=~s/\s+,/,/;
4115: } else {
4116: $name.= $firstname.' '.$middlename.' '.$generation;
4117: }
4118: }
4119: $name=~s/^\s+//;
4120: $name=~s/\s+$//;
4121: $name=~s/\s+/ /g;
4122: return $name;
4123: }
4124:
4125: # ------------------------------------------------- Write to course preferences
4126:
4127: sub writecoursepref {
4128: my ($courseid,%prefs)=@_;
4129: $courseid=~s/^\///;
4130: $courseid=~s/\_/\//g;
4131: my ($cdomain,$cnum)=split(/\//,$courseid);
4132: my $chome=homeserver($cnum,$cdomain);
4133: if (($chome eq '') || ($chome eq 'no_host')) {
4134: return 'error: no such course';
4135: }
4136: my $cstring='';
4137: foreach (keys %prefs) {
4138: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
4139: }
4140: $cstring=~s/\&$//;
4141: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
4142: }
4143:
4144: # ---------------------------------------------------------- Make/modify course
4145:
4146: sub createcourse {
4147: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_;
4148: $url=&declutter($url);
4149: my $cid='';
4150: unless (&allowed('ccc',$udom)) {
4151: return 'refused';
4152: }
4153: # ------------------------------------------------------------------- Create ID
4154: my $uname=int(1+rand(9)).
4155: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
4156: substr($$.time,0,5).unpack("H8",pack("I32",time)).
4157: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4158: # ----------------------------------------------- Make sure that does not exist
4159: my $uhome=&homeserver($uname,$udom,'true');
4160: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4161: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
4162: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4163: $uhome=&homeserver($uname,$udom,'true');
4164: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4165: return 'error: unable to generate unique course-ID';
4166: }
4167: }
4168: # ------------------------------------------------ Check supplied server name
4169: $course_server = $env{'user.homeserver'} if (! defined($course_server));
4170: if (! exists($libserv{$course_server})) {
4171: return 'error:bad server name '.$course_server;
4172: }
4173: # ------------------------------------------------------------- Make the course
4174: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
4175: $course_server);
4176: unless ($reply eq 'ok') { return 'error: '.$reply; }
4177: $uhome=&homeserver($uname,$udom,'true');
4178: if (($uhome eq '') || ($uhome eq 'no_host')) {
4179: return 'error: no such course';
4180: }
4181: # ----------------------------------------------------------------- Course made
4182: # log existence
4183: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
4184: ':'.&escape($inst_code).':'.&escape($course_owner),$uhome);
4185: &flushcourselogs();
4186: # set toplevel url
4187: my $topurl=$url;
4188: unless ($nonstandard) {
4189: # ------------------------------------------ For standard courses, make top url
4190: my $mapurl=&clutter($url);
4191: if ($mapurl eq '/res/') { $mapurl=''; }
4192: $env{'form.initmap'}=(<<ENDINITMAP);
4193: <map>
4194: <resource id="1" type="start"></resource>
4195: <resource id="2" src="$mapurl"></resource>
4196: <resource id="3" type="finish"></resource>
4197: <link index="1" from="1" to="2"></link>
4198: <link index="2" from="2" to="3"></link>
4199: </map>
4200: ENDINITMAP
4201: $topurl=&declutter(
4202: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
4203: );
4204: }
4205: # ----------------------------------------------------------- Write preferences
4206: &writecoursepref($udom.'_'.$uname,
4207: ('description' => $description,
4208: 'url' => $topurl));
4209: return '/'.$udom.'/'.$uname;
4210: }
4211:
4212: # ---------------------------------------------------------- Assign Custom Role
4213:
4214: sub assigncustomrole {
4215: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
4216: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
4217: $end,$start,$deleteflag);
4218: }
4219:
4220: # ----------------------------------------------------------------- Revoke Role
4221:
4222: sub revokerole {
4223: my ($udom,$uname,$url,$role,$deleteflag)=@_;
4224: my $now=time;
4225: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
4226: }
4227:
4228: # ---------------------------------------------------------- Revoke Custom Role
4229:
4230: sub revokecustomrole {
4231: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
4232: my $now=time;
4233: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
4234: $deleteflag);
4235: }
4236:
4237: # ------------------------------------------------------------ Disk usage
4238: sub diskusage {
4239: my ($udom,$uname,$directoryRoot)=@_;
4240: $directoryRoot =~ s/\/$//;
4241: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
4242: return $listing;
4243: }
4244:
4245: sub is_locked {
4246: my ($file_name, $domain, $user) = @_;
4247: my @check;
4248: my $is_locked;
4249: push @check, $file_name;
4250: my %locked = &get('file_permissions',\@check,
4251: $env{'user.domain'},$env{'user.name'});
4252: my ($tmp)=keys(%locked);
4253: if ($tmp=~/^error:/) { undef(%locked); }
4254:
4255: if (ref($locked{$file_name}) eq 'ARRAY') {
4256: $is_locked = 'true';
4257: } else {
4258: $is_locked = 'false';
4259: }
4260: }
4261:
4262: # ------------------------------------------------------------- Mark as Read Only
4263:
4264: sub mark_as_readonly {
4265: my ($domain,$user,$files,$what) = @_;
4266: my %current_permissions = &dump('file_permissions',$domain,$user);
4267: my ($tmp)=keys(%current_permissions);
4268: if ($tmp=~/^error:/) { undef(%current_permissions); }
4269: foreach my $file (@{$files}) {
4270: push(@{$current_permissions{$file}},$what);
4271: }
4272: &put('file_permissions',\%current_permissions,$domain,$user);
4273: return;
4274: }
4275:
4276: # ------------------------------------------------------------Save Selected Files
4277:
4278: sub save_selected_files {
4279: my ($user, $path, @files) = @_;
4280: my $filename = $user."savedfiles";
4281: my @other_files = &files_not_in_path($user, $path);
4282: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4283: foreach my $file (@files) {
4284: print (OUT $env{'form.currentpath'}.$file."\n");
4285: }
4286: foreach my $file (@other_files) {
4287: print (OUT $file."\n");
4288: }
4289: close (OUT);
4290: return 'ok';
4291: }
4292:
4293: sub clear_selected_files {
4294: my ($user) = @_;
4295: my $filename = $user."savedfiles";
4296: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4297: print (OUT undef);
4298: close (OUT);
4299: return ("ok");
4300: }
4301:
4302: sub files_in_path {
4303: my ($user, $path) = @_;
4304: my $filename = $user."savedfiles";
4305: my %return_files;
4306: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4307: while (my $line_in = <IN>) {
4308: chomp ($line_in);
4309: my @paths_and_file = split (m!/!, $line_in);
4310: my $file_part = pop (@paths_and_file);
4311: my $path_part = join ('/', @paths_and_file);
4312: $path_part.='/';
4313: my $path_and_file = $path_part.$file_part;
4314: if ($path_part eq $path) {
4315: $return_files{$file_part}= 'selected';
4316: }
4317: }
4318: close (IN);
4319: return (\%return_files);
4320: }
4321:
4322: # called in portfolio select mode, to show files selected NOT in current directory
4323: sub files_not_in_path {
4324: my ($user, $path) = @_;
4325: my $filename = $user."savedfiles";
4326: my @return_files;
4327: my $path_part;
4328: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4329: while (<IN>) {
4330: #ok, I know it's clunky, but I want it to work
4331: my @paths_and_file = split m!/!, $_;
4332: my $file_part = pop (@paths_and_file);
4333: chomp ($file_part);
4334: my $path_part = join ('/', @paths_and_file);
4335: $path_part .= '/';
4336: my $path_and_file = $path_part.$file_part;
4337: if ($path_part ne $path) {
4338: push (@return_files, ($path_and_file));
4339: }
4340: }
4341: close (OUT);
4342: return (@return_files);
4343: }
4344:
4345: #--------------------------------------------------------------Get Marked as Read Only
4346:
4347:
4348: sub get_marked_as_readonly {
4349: my ($domain,$user,$what) = @_;
4350: my %current_permissions = &dump('file_permissions',$domain,$user);
4351: my ($tmp)=keys(%current_permissions);
4352: if ($tmp=~/^error:/) { undef(%current_permissions); }
4353: my @readonly_files;
4354: my $cmp1=$what;
4355: if (ref($what)) { $cmp1=join('',@{$what}) };
4356: while (my ($file_name,$value) = each(%current_permissions)) {
4357: if (ref($value) eq "ARRAY"){
4358: foreach my $stored_what (@{$value}) {
4359: my $cmp2=$stored_what;
4360: if (ref($stored_what)) { $cmp2=join('',@{$stored_what}) };
4361: if ($cmp1 eq $cmp2) {
4362: push(@readonly_files, $file_name);
4363: } elsif (!defined($what)) {
4364: push(@readonly_files, $file_name);
4365: }
4366: }
4367: }
4368: }
4369: return @readonly_files;
4370: }
4371: #-----------------------------------------------------------Get Marked as Read Only Hash
4372:
4373: sub get_marked_as_readonly_hash {
4374: my ($domain,$user,$what) = @_;
4375: my %current_permissions = &dump('file_permissions',$domain,$user);
4376: my ($tmp)=keys(%current_permissions);
4377: if ($tmp=~/^error:/) { undef(%current_permissions); }
4378:
4379: my %readonly_files;
4380: while (my ($file_name,$value) = each(%current_permissions)) {
4381: if (ref($value) eq "ARRAY"){
4382: foreach my $stored_what (@{$value}) {
4383: if ($stored_what eq $what) {
4384: $readonly_files{$file_name} = 'locked';
4385: } elsif (!defined($what)) {
4386: $readonly_files{$file_name} = 'locked';
4387: }
4388: }
4389: }
4390: }
4391: return %readonly_files;
4392: }
4393: # ------------------------------------------------------------ Unmark as Read Only
4394:
4395: sub unmark_as_readonly {
4396: # unmarks $file_name (if $file_name is defined), or all files locked by $what
4397: # for portfolio submissions, $what contains [$symb,$crsid]
4398: my ($domain,$user,$what,$file_name) = @_;
4399: my $symb_crs = $what;
4400: if (ref($what)) { $symb_crs=join('',@$what); }
4401: my %current_permissions = &dump('file_permissions',$domain,$user);
4402: my ($tmp)=keys(%current_permissions);
4403: if ($tmp=~/^error:/) { undef(%current_permissions); }
4404: my @readonly_files = &get_marked_as_readonly($domain,$user,$what);
4405: foreach my $file (@readonly_files) {
4406: if (defined($file_name) && ($file_name ne $file)) { next; }
4407: my $current_locks = $current_permissions{$file};
4408: my @new_locks;
4409: my @del_keys;
4410: if (ref($current_locks) eq "ARRAY"){
4411: foreach my $locker (@{$current_locks}) {
4412: my $compare=$locker;
4413: if (ref($locker)) { $compare=join('',@{$locker}) };
4414: if ($compare ne $symb_crs) {
4415: push(@new_locks, $locker);
4416: }
4417: }
4418: if (scalar(@new_locks) > 0) {
4419: $current_permissions{$file} = \@new_locks;
4420: } else {
4421: push(@del_keys, $file);
4422: &del('file_permissions',\@del_keys, $domain, $user);
4423: delete($current_permissions{$file});
4424: }
4425: }
4426: }
4427: &put('file_permissions',\%current_permissions,$domain,$user);
4428: return;
4429: }
4430:
4431: # ------------------------------------------------------------ Directory lister
4432:
4433: sub dirlist {
4434: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
4435:
4436: $uri=~s/^\///;
4437: $uri=~s/\/$//;
4438: my ($udom, $uname);
4439: (undef,$udom,$uname)=split(/\//,$uri);
4440: if(defined($userdomain)) {
4441: $udom = $userdomain;
4442: }
4443: if(defined($username)) {
4444: $uname = $username;
4445: }
4446:
4447: my $dirRoot = $perlvar{'lonDocRoot'};
4448: if(defined($alternateDirectoryRoot)) {
4449: $dirRoot = $alternateDirectoryRoot;
4450: $dirRoot =~ s/\/$//;
4451: }
4452:
4453: if($udom) {
4454: if($uname) {
4455: my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
4456: homeserver($uname,$udom));
4457: my @listing_results;
4458: if ($listing eq 'unknown_cmd') {
4459: $listing=reply('ls:'.$dirRoot.'/'.$uri,
4460: homeserver($uname,$udom));
4461: @listing_results = split(/:/,$listing);
4462: } else {
4463: @listing_results = map { &unescape($_); } split(/:/,$listing);
4464: }
4465: return @listing_results;
4466: } elsif(!defined($alternateDirectoryRoot)) {
4467: my $tryserver;
4468: my %allusers=();
4469: foreach $tryserver (keys %libserv) {
4470: if($hostdom{$tryserver} eq $udom) {
4471: my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
4472: $udom, $tryserver);
4473: my @listing_results;
4474: if ($listing eq 'unknown_cmd') {
4475: $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
4476: $udom, $tryserver);
4477: @listing_results = split(/:/,$listing);
4478: } else {
4479: @listing_results =
4480: map { &unescape($_); } split(/:/,$listing);
4481: }
4482: if ($listing_results[0] ne 'no_such_dir' &&
4483: $listing_results[0] ne 'empty' &&
4484: $listing_results[0] ne 'con_lost') {
4485: foreach (@listing_results) {
4486: my ($entry,@stat)=split(/&/,$_);
4487: $allusers{$entry}=1;
4488: }
4489: }
4490: }
4491: }
4492: my $alluserstr='';
4493: foreach (sort keys %allusers) {
4494: $alluserstr.=$_.'&user:';
4495: }
4496: $alluserstr=~s/:$//;
4497: return split(/:/,$alluserstr);
4498: } else {
4499: my @emptyResults = ();
4500: push(@emptyResults, 'missing user name');
4501: return split(':',@emptyResults);
4502: }
4503: } elsif(!defined($alternateDirectoryRoot)) {
4504: my $tryserver;
4505: my %alldom=();
4506: foreach $tryserver (keys %libserv) {
4507: $alldom{$hostdom{$tryserver}}=1;
4508: }
4509: my $alldomstr='';
4510: foreach (sort keys %alldom) {
4511: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
4512: }
4513: $alldomstr=~s/:$//;
4514: return split(/:/,$alldomstr);
4515: } else {
4516: my @emptyResults = ();
4517: push(@emptyResults, 'missing domain');
4518: return split(':',@emptyResults);
4519: }
4520: }
4521:
4522: # --------------------------------------------- GetFileTimestamp
4523: # This function utilizes dirlist and returns the date stamp for
4524: # when it was last modified. It will also return an error of -1
4525: # if an error occurs
4526:
4527: ##
4528: ## FIXME: This subroutine assumes its caller knows something about the
4529: ## directory structure of the home server for the student ($root).
4530: ## Not a good assumption to make. Since this is for looking up files
4531: ## in user directories, the full path should be constructed by lond, not
4532: ## whatever machine we request data from.
4533: ##
4534: sub GetFileTimestamp {
4535: my ($studentDomain,$studentName,$filename,$root)=@_;
4536: $studentDomain=~s/\W//g;
4537: $studentName=~s/\W//g;
4538: my $subdir=$studentName.'__';
4539: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4540: my $proname="$studentDomain/$subdir/$studentName";
4541: $proname .= '/'.$filename;
4542: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
4543: $studentName, $root);
4544: my @stats = split('&', $fileStat);
4545: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4546: # @stats contains first the filename, then the stat output
4547: return $stats[10]; # so this is 10 instead of 9.
4548: } else {
4549: return -1;
4550: }
4551: }
4552:
4553: # -------------------------------------------------------- Value of a Condition
4554:
4555: sub directcondval {
4556: my $number=shift;
4557: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
4558: &Apache::lonuserstate::evalstate();
4559: }
4560: if ($env{'user.state.'.$env{'request.course.id'}}) {
4561: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
4562: } else {
4563: return 2;
4564: }
4565: }
4566:
4567: sub condval {
4568: my $condidx=shift;
4569: my $result=0;
4570: my $allpathcond='';
4571: foreach (split(/\|/,$condidx)) {
4572: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$_})) {
4573: $allpathcond.=
4574: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$_}.')|';
4575: }
4576: }
4577: $allpathcond=~s/\|$//;
4578: if ($env{'request.course.id'}) {
4579: if ($allpathcond) {
4580: my $operand='|';
4581: my @stack;
4582: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
4583: if ($_ eq '(') {
4584: push @stack,($operand,$result)
4585: } elsif ($_ eq ')') {
4586: my $before=pop @stack;
4587: if (pop @stack eq '&') {
4588: $result=$result>$before?$before:$result;
4589: } else {
4590: $result=$result>$before?$result:$before;
4591: }
4592: } elsif (($_ eq '&') || ($_ eq '|')) {
4593: $operand=$_;
4594: } else {
4595: my $new=directcondval($_);
4596: if ($operand eq '&') {
4597: $result=$result>$new?$new:$result;
4598: } else {
4599: $result=$result>$new?$result:$new;
4600: }
4601: }
4602: }
4603: }
4604: }
4605: return $result;
4606: }
4607:
4608: # ---------------------------------------------------- Devalidate courseresdata
4609:
4610: sub devalidatecourseresdata {
4611: my ($coursenum,$coursedomain)=@_;
4612: my $hashid=$coursenum.':'.$coursedomain;
4613: &devalidate_cache_new('courseres',$hashid);
4614: }
4615:
4616: # --------------------------------------------------- Course Resourcedata Query
4617:
4618: sub get_courseresdata {
4619: my ($coursenum,$coursedomain)=@_;
4620: my $coursehom=&homeserver($coursenum,$coursedomain);
4621: my $hashid=$coursenum.':'.$coursedomain;
4622: my ($result,$cached)=&is_cached_new('courseres',$hashid);
4623: my %dumpreply;
4624: unless (defined($cached)) {
4625: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
4626: $result=\%dumpreply;
4627: my ($tmp) = keys(%dumpreply);
4628: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
4629: &do_cache_new('courseres',$hashid,$result,600);
4630: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4631: return $tmp;
4632: } elsif ($tmp =~ /^(error)/) {
4633: $result=undef;
4634: &do_cache_new('courseres',$hashid,$result,600);
4635: }
4636: }
4637: return $result;
4638: }
4639:
4640: sub devalidateuserresdata {
4641: my ($uname,$udom)=@_;
4642: my $hashid="$udom:$uname";
4643: &devalidate_cache_new('userres',$hashid);
4644: }
4645:
4646: sub get_userresdata {
4647: my ($uname,$udom)=@_;
4648: #most student don\'t have any data set, check if there is some data
4649: if (&EXT_cache_status($udom,$uname)) { return undef; }
4650:
4651: my $hashid="$udom:$uname";
4652: my ($result,$cached)=&is_cached_new('userres',$hashid);
4653: if (!defined($cached)) {
4654: my %resourcedata=&dump('resourcedata',$udom,$uname);
4655: $result=\%resourcedata;
4656: &do_cache_new('userres',$hashid,$result,600);
4657: }
4658: my ($tmp)=keys(%$result);
4659: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4660: return $result;
4661: }
4662: #error 2 occurs when the .db doesn't exist
4663: if ($tmp!~/error: 2 /) {
4664: &logthis("<font color=\"blue\">WARNING:".
4665: " Trying to get resource data for ".
4666: $uname." at ".$udom.": ".
4667: $tmp."</font>");
4668: } elsif ($tmp=~/error: 2 /) {
4669: #&EXT_cache_set($udom,$uname);
4670: &do_cache_new('userres',$hashid,undef,600);
4671: undef($tmp); # not really an error so don't send it back
4672: }
4673: return $tmp;
4674: }
4675:
4676: sub resdata {
4677: my ($name,$domain,$type,@which)=@_;
4678: my $result;
4679: if ($type eq 'course') {
4680: $result=&get_courseresdata($name,$domain);
4681: } elsif ($type eq 'user') {
4682: $result=&get_userresdata($name,$domain);
4683: }
4684: if (!ref($result)) { return $result; }
4685: foreach my $item (@which) {
4686: if (defined($result->{$item})) {
4687: return $result->{$item};
4688: }
4689: }
4690: return undef;
4691: }
4692:
4693: #
4694: # EXT resource caching routines
4695: #
4696:
4697: sub clear_EXT_cache_status {
4698: &delenv('cache.EXT.');
4699: }
4700:
4701: sub EXT_cache_status {
4702: my ($target_domain,$target_user) = @_;
4703: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4704: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
4705: # We know already the user has no data
4706: return 1;
4707: } else {
4708: return 0;
4709: }
4710: }
4711:
4712: sub EXT_cache_set {
4713: my ($target_domain,$target_user) = @_;
4714: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4715: #&appenv($cachename => time);
4716: }
4717:
4718: # --------------------------------------------------------- Value of a Variable
4719: sub EXT {
4720: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
4721:
4722: unless ($varname) { return ''; }
4723: #get real user name/domain, courseid and symb
4724: my $courseid;
4725: my $publicuser;
4726: if ($symbparm) {
4727: $symbparm=&get_symb_from_alias($symbparm);
4728: }
4729: if (!($uname && $udom)) {
4730: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
4731: &Apache::lonxml::whichuser($symbparm);
4732: if (!$symbparm) { $symbparm=$cursymb; }
4733: } else {
4734: $courseid=$env{'request.course.id'};
4735: }
4736: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
4737: my $rest;
4738: if (defined($therest[0])) {
4739: $rest=join('.',@therest);
4740: } else {
4741: $rest='';
4742: }
4743:
4744: my $qualifierrest=$qualifier;
4745: if ($rest) { $qualifierrest.='.'.$rest; }
4746: my $spacequalifierrest=$space;
4747: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
4748: if ($realm eq 'user') {
4749: # --------------------------------------------------------------- user.resource
4750: if ($space eq 'resource') {
4751: if ( (defined($Apache::lonhomework::parsing_a_problem)
4752: || defined($Apache::lonhomework::parsing_a_task))
4753: &&
4754: ($symbparm eq &symbread()) ) {
4755: return $Apache::lonhomework::history{$qualifierrest};
4756: } else {
4757: my %restored;
4758: if ($publicuser || $env{'request.state'} eq 'construct') {
4759: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
4760: } else {
4761: %restored=&restore($symbparm,$courseid,$udom,$uname);
4762: }
4763: return $restored{$qualifierrest};
4764: }
4765: # ----------------------------------------------------------------- user.access
4766: } elsif ($space eq 'access') {
4767: # FIXME - not supporting calls for a specific user
4768: return &allowed($qualifier,$rest);
4769: # ------------------------------------------ user.preferences, user.environment
4770: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
4771: if (($uname eq $env{'user.name'}) &&
4772: ($udom eq $env{'user.domain'})) {
4773: return $env{join('.',('environment',$qualifierrest))};
4774: } else {
4775: my %returnhash;
4776: if (!$publicuser) {
4777: %returnhash=&userenvironment($udom,$uname,
4778: $qualifierrest);
4779: }
4780: return $returnhash{$qualifierrest};
4781: }
4782: # ----------------------------------------------------------------- user.course
4783: } elsif ($space eq 'course') {
4784: # FIXME - not supporting calls for a specific user
4785: return $env{join('.',('request.course',$qualifier))};
4786: # ------------------------------------------------------------------- user.role
4787: } elsif ($space eq 'role') {
4788: # FIXME - not supporting calls for a specific user
4789: my ($role,$where)=split(/\./,$env{'request.role'});
4790: if ($qualifier eq 'value') {
4791: return $role;
4792: } elsif ($qualifier eq 'extent') {
4793: return $where;
4794: }
4795: # ----------------------------------------------------------------- user.domain
4796: } elsif ($space eq 'domain') {
4797: return $udom;
4798: # ------------------------------------------------------------------- user.name
4799: } elsif ($space eq 'name') {
4800: return $uname;
4801: # ---------------------------------------------------- Any other user namespace
4802: } else {
4803: my %reply;
4804: if (!$publicuser) {
4805: %reply=&get($space,[$qualifierrest],$udom,$uname);
4806: }
4807: return $reply{$qualifierrest};
4808: }
4809: } elsif ($realm eq 'query') {
4810: # ---------------------------------------------- pull stuff out of query string
4811: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
4812: [$spacequalifierrest]);
4813: return $env{'form.'.$spacequalifierrest};
4814: } elsif ($realm eq 'request') {
4815: # ------------------------------------------------------------- request.browser
4816: if ($space eq 'browser') {
4817: if ($qualifier eq 'textremote') {
4818: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
4819: return 1;
4820: } else {
4821: return 0;
4822: }
4823: } else {
4824: return $env{'browser.'.$qualifier};
4825: }
4826: # ------------------------------------------------------------ request.filename
4827: } else {
4828: return $env{'request.'.$spacequalifierrest};
4829: }
4830: } elsif ($realm eq 'course') {
4831: # ---------------------------------------------------------- course.description
4832: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
4833: } elsif ($realm eq 'resource') {
4834:
4835: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
4836: if (!$symbparm) { $symbparm=&symbread(); }
4837: }
4838:
4839: if ($space eq 'title') {
4840: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
4841: return &gettitle($symbparm);
4842: }
4843:
4844: if ($space eq 'map') {
4845: my ($map) = &decode_symb($symbparm);
4846: return &symbread($map);
4847: }
4848:
4849: my ($section, $group, @groups);
4850: my ($courselevelm,$courselevel);
4851: if ($symbparm && defined($courseid) &&
4852: $courseid eq $env{'request.course.id'}) {
4853:
4854: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
4855:
4856: # ----------------------------------------------------- Cascading lookup scheme
4857: my $symbp=$symbparm;
4858: my $mapp=(&decode_symb($symbp))[0];
4859:
4860: my $symbparm=$symbp.'.'.$spacequalifierrest;
4861: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
4862:
4863: if (($env{'user.name'} eq $uname) &&
4864: ($env{'user.domain'} eq $udom)) {
4865: $section=$env{'request.course.sec'};
4866: @groups=&sort_course_groups($env{'request.course.groups'},$courseid);
4867: if (@groups > 0) {
4868: @groups = sort(@groups);
4869: }
4870: } else {
4871: if (! defined($usection)) {
4872: $section=&getsection($udom,$uname,$courseid);
4873: } else {
4874: $section = $usection;
4875: }
4876: my $grouplist = &get_users_groups($udom,$uname,$courseid);
4877: if ($grouplist) {
4878: @groups=&sort_course_groups($grouplist,$courseid);
4879: }
4880: }
4881:
4882: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
4883: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
4884: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
4885:
4886: $courselevel=$courseid.'.'.$spacequalifierrest;
4887: my $courselevelr=$courseid.'.'.$symbparm;
4888: $courselevelm=$courseid.'.'.$mapparm;
4889:
4890: # ----------------------------------------------------------- first, check user
4891:
4892: my $userreply=&resdata($uname,$udom,'user',
4893: ($courselevelr,$courselevelm,
4894: $courselevel));
4895: if (defined($userreply)) { return $userreply; }
4896:
4897: # ------------------------------------------------ second, check some of course
4898: my $coursereply;
4899: if (@groups > 0) {
4900: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
4901: $mapparm,$spacequalifierrest);
4902: if (defined($coursereply)) { return $coursereply; }
4903: }
4904:
4905: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
4906: $env{'course.'.$courseid.'.domain'},
4907: 'course',
4908: ($seclevelr,$seclevelm,$seclevel,
4909: $courselevelr));
4910: if (defined($coursereply)) { return $coursereply; }
4911:
4912: # ------------------------------------------------------ third, check map parms
4913: my %parmhash=();
4914: my $thisparm='';
4915: if (tie(%parmhash,'GDBM_File',
4916: $env{'request.course.fn'}.'_parms.db',
4917: &GDBM_READER(),0640)) {
4918: $thisparm=$parmhash{$symbparm};
4919: untie(%parmhash);
4920: }
4921: if ($thisparm) { return $thisparm; }
4922: }
4923: # ------------------------------------------ fourth, look in resource metadata
4924:
4925: $spacequalifierrest=~s/\./\_/;
4926: my $filename;
4927: if (!$symbparm) { $symbparm=&symbread(); }
4928: if ($symbparm) {
4929: $filename=(&decode_symb($symbparm))[2];
4930: } else {
4931: $filename=$env{'request.filename'};
4932: }
4933: my $metadata=&metadata($filename,$spacequalifierrest);
4934: if (defined($metadata)) { return $metadata; }
4935: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
4936: if (defined($metadata)) { return $metadata; }
4937:
4938: # ---------------------------------------------- fourth, look in rest pf course
4939: if ($symbparm && defined($courseid) &&
4940: $courseid eq $env{'request.course.id'}) {
4941: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
4942: $env{'course.'.$courseid.'.domain'},
4943: 'course',
4944: ($courselevelm,$courselevel));
4945: if (defined($coursereply)) { return $coursereply; }
4946: }
4947: # ------------------------------------------------------------------ Cascade up
4948: unless ($space eq '0') {
4949: my @parts=split(/_/,$space);
4950: my $id=pop(@parts);
4951: my $part=join('_',@parts);
4952: if ($part eq '') { $part='0'; }
4953: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
4954: $symbparm,$udom,$uname,$section,1);
4955: if (defined($partgeneral)) { return $partgeneral; }
4956: }
4957: if ($recurse) { return undef; }
4958: my $pack_def=&packages_tab_default($filename,$varname);
4959: if (defined($pack_def)) { return $pack_def; }
4960:
4961: # ---------------------------------------------------- Any other user namespace
4962: } elsif ($realm eq 'environment') {
4963: # ----------------------------------------------------------------- environment
4964: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
4965: return $env{'environment.'.$spacequalifierrest};
4966: } else {
4967: my %returnhash=&userenvironment($udom,$uname,
4968: $spacequalifierrest);
4969: return $returnhash{$spacequalifierrest};
4970: }
4971: } elsif ($realm eq 'system') {
4972: # ----------------------------------------------------------------- system.time
4973: if ($space eq 'time') {
4974: return time;
4975: }
4976: } elsif ($realm eq 'server') {
4977: # ----------------------------------------------------------------- system.time
4978: if ($space eq 'name') {
4979: return $ENV{'SERVER_NAME'};
4980: }
4981: }
4982: return '';
4983: }
4984:
4985: sub check_group_parms {
4986: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
4987: my @groupitems = ();
4988: my $resultitem;
4989: my @levels = ($symbparm,$mapparm,$what);
4990: foreach my $group (@{$groups}) {
4991: foreach my $level (@levels) {
4992: my $item = $courseid.'.['.$group.'].'.$level;
4993: push(@groupitems,$item);
4994: }
4995: }
4996: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
4997: $env{'course.'.$courseid.'.domain'},
4998: 'course',@groupitems);
4999: return $coursereply;
5000: }
5001:
5002: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
5003: my ($grouplist,$courseid) = @_;
5004: my @groups = split/:/,$grouplist;
5005: if (@groups > 1) {
5006: @groups = sort(@groups);
5007: }
5008: return @groups;
5009: }
5010:
5011: sub packages_tab_default {
5012: my ($uri,$varname)=@_;
5013: my (undef,$part,$name)=split(/\./,$varname);
5014: my $packages=&metadata($uri,'packages');
5015: foreach my $package (split(/,/,$packages)) {
5016: my ($pack_type,$pack_part)=split(/_/,$package,2);
5017: if (defined($packagetab{"$pack_type&$name&default"})) {
5018: return $packagetab{"$pack_type&$name&default"};
5019: }
5020: if ($pack_type eq 'part') { $pack_part='0'; }
5021: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
5022: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
5023: }
5024: }
5025: return undef;
5026: }
5027:
5028: sub add_prefix_and_part {
5029: my ($prefix,$part)=@_;
5030: my $keyroot;
5031: if (defined($prefix) && $prefix !~ /^__/) {
5032: # prefix that has a part already
5033: $keyroot=$prefix;
5034: } elsif (defined($prefix)) {
5035: # prefix that is missing a part
5036: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
5037: } else {
5038: # no prefix at all
5039: if (defined($part)) { $keyroot='_'.$part; }
5040: }
5041: return $keyroot;
5042: }
5043:
5044: # ---------------------------------------------------------------- Get metadata
5045:
5046: my %metaentry;
5047: sub metadata {
5048: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
5049: $uri=&declutter($uri);
5050: # if it is a non metadata possible uri return quickly
5051: if (($uri eq '') ||
5052: (($uri =~ m|^/*adm/|) &&
5053: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
5054: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
5055: ($uri =~ m|home/[^/]+/public_html/|)) {
5056: return undef;
5057: }
5058: my $filename=$uri;
5059: $uri=~s/\.meta$//;
5060: #
5061: # Is the metadata already cached?
5062: # Look at timestamp of caching
5063: # Everything is cached by the main uri, libraries are never directly cached
5064: #
5065: if (!defined($liburi)) {
5066: my ($result,$cached)=&is_cached_new('meta',$uri);
5067: if (defined($cached)) { return $result->{':'.$what}; }
5068: }
5069: {
5070: #
5071: # Is this a recursive call for a library?
5072: #
5073: # if (! exists($metacache{$uri})) {
5074: # $metacache{$uri}={};
5075: # }
5076: if ($liburi) {
5077: $liburi=&declutter($liburi);
5078: $filename=$liburi;
5079: } else {
5080: &devalidate_cache_new('meta',$uri);
5081: undef(%metaentry);
5082: }
5083: my %metathesekeys=();
5084: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
5085: my $metastring;
5086: if ($uri !~ m -^(uploaded|editupload)/-) {
5087: my $file=&filelocation('',&clutter($filename));
5088: #push(@{$metaentry{$uri.'.file'}},$file);
5089: $metastring=&getfile($file);
5090: }
5091: my $parser=HTML::LCParser->new(\$metastring);
5092: my $token;
5093: undef %metathesekeys;
5094: while ($token=$parser->get_token) {
5095: if ($token->[0] eq 'S') {
5096: if (defined($token->[2]->{'package'})) {
5097: #
5098: # This is a package - get package info
5099: #
5100: my $package=$token->[2]->{'package'};
5101: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5102: if (defined($token->[2]->{'id'})) {
5103: $keyroot.='_'.$token->[2]->{'id'};
5104: }
5105: if ($metaentry{':packages'}) {
5106: $metaentry{':packages'}.=','.$package.$keyroot;
5107: } else {
5108: $metaentry{':packages'}=$package.$keyroot;
5109: }
5110: foreach (sort keys %packagetab) {
5111: my $part=$keyroot;
5112: $part=~s/^\_//;
5113: if ($_=~/^\Q$package\E\&/ ||
5114: $_=~/^\Q$package\E_0\&/) {
5115: my ($pack,$name,$subp)=split(/\&/,$_);
5116: # ignore package.tab specified default values
5117: # here &package_tab_default() will fetch those
5118: if ($subp eq 'default') { next; }
5119: my $value=$packagetab{$_};
5120: my $unikey;
5121: if ($pack =~ /_0$/) {
5122: $unikey='parameter_0_'.$name;
5123: $part=0;
5124: } else {
5125: $unikey='parameter'.$keyroot.'_'.$name;
5126: }
5127: if ($subp eq 'display') {
5128: $value.=' [Part: '.$part.']';
5129: }
5130: $metaentry{':'.$unikey.'.part'}=$part;
5131: $metathesekeys{$unikey}=1;
5132: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
5133: $metaentry{':'.$unikey.'.'.$subp}=$value;
5134: }
5135: if (defined($metaentry{':'.$unikey.'.default'})) {
5136: $metaentry{':'.$unikey}=
5137: $metaentry{':'.$unikey.'.default'};
5138: }
5139: }
5140: }
5141: } else {
5142: #
5143: # This is not a package - some other kind of start tag
5144: #
5145: my $entry=$token->[1];
5146: my $unikey;
5147: if ($entry eq 'import') {
5148: $unikey='';
5149: } else {
5150: $unikey=$entry;
5151: }
5152: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5153:
5154: if (defined($token->[2]->{'id'})) {
5155: $unikey.='_'.$token->[2]->{'id'};
5156: }
5157:
5158: if ($entry eq 'import') {
5159: #
5160: # Importing a library here
5161: #
5162: if ($depthcount<20) {
5163: my $location=$parser->get_text('/import');
5164: my $dir=$filename;
5165: $dir=~s|[^/]*$||;
5166: $location=&filelocation($dir,$location);
5167: foreach (sort(split(/\,/,&metadata($uri,'keys',
5168: $location,$unikey,
5169: $depthcount+1)))) {
5170: $metaentry{':'.$_}=$metaentry{':'.$_};
5171: $metathesekeys{$_}=1;
5172: }
5173: }
5174: } else {
5175:
5176: if (defined($token->[2]->{'name'})) {
5177: $unikey.='_'.$token->[2]->{'name'};
5178: }
5179: $metathesekeys{$unikey}=1;
5180: foreach (@{$token->[3]}) {
5181: $metaentry{':'.$unikey.'.'.$_}=$token->[2]->{$_};
5182: }
5183: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
5184: my $default=$metaentry{':'.$unikey.'.default'};
5185: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
5186: # only ws inside the tag, and not in default, so use default
5187: # as value
5188: $metaentry{':'.$unikey}=$default;
5189: } else {
5190: # either something interesting inside the tag or default
5191: # uninteresting
5192: $metaentry{':'.$unikey}=$internaltext;
5193: }
5194: # end of not-a-package not-a-library import
5195: }
5196: # end of not-a-package start tag
5197: }
5198: # the next is the end of "start tag"
5199: }
5200: }
5201: my ($extension) = ($uri =~ /\.(\w+)$/);
5202: foreach my $key (sort(keys(%packagetab))) {
5203: #no specific packages #how's our extension
5204: if ($key!~/^extension_\Q$extension\E&/) { next; }
5205: &metadata_create_package_def($uri,$key,'extension_'.$extension,
5206: \%metathesekeys);
5207: }
5208: if (!exists($metaentry{':packages'})) {
5209: foreach my $key (sort(keys(%packagetab))) {
5210: #no specific packages well let's get default then
5211: if ($key!~/^default&/) { next; }
5212: &metadata_create_package_def($uri,$key,'default',
5213: \%metathesekeys);
5214: }
5215: }
5216: # are there custom rights to evaluate
5217: if ($metaentry{':copyright'} eq 'custom') {
5218:
5219: #
5220: # Importing a rights file here
5221: #
5222: unless ($depthcount) {
5223: my $location=$metaentry{':customdistributionfile'};
5224: my $dir=$filename;
5225: $dir=~s|[^/]*$||;
5226: $location=&filelocation($dir,$location);
5227: foreach (sort(split(/\,/,&metadata($uri,'keys',
5228: $location,'_rights',
5229: $depthcount+1)))) {
5230: #$metaentry{':'.$_}=$metacache{$uri}->{':'.$_};
5231: $metathesekeys{$_}=1;
5232: }
5233: }
5234: }
5235: $metaentry{':keys'}=join(',',keys %metathesekeys);
5236: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
5237: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
5238: &do_cache_new('meta',$uri,\%metaentry,60*60);
5239: # this is the end of "was not already recently cached
5240: }
5241: return $metaentry{':'.$what};
5242: }
5243:
5244: sub metadata_create_package_def {
5245: my ($uri,$key,$package,$metathesekeys)=@_;
5246: my ($pack,$name,$subp)=split(/\&/,$key);
5247: if ($subp eq 'default') { next; }
5248:
5249: if (defined($metaentry{':packages'})) {
5250: $metaentry{':packages'}.=','.$package;
5251: } else {
5252: $metaentry{':packages'}=$package;
5253: }
5254: my $value=$packagetab{$key};
5255: my $unikey;
5256: $unikey='parameter_0_'.$name;
5257: $metaentry{':'.$unikey.'.part'}=0;
5258: $$metathesekeys{$unikey}=1;
5259: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
5260: $metaentry{':'.$unikey.'.'.$subp}=$value;
5261: }
5262: if (defined($metaentry{':'.$unikey.'.default'})) {
5263: $metaentry{':'.$unikey}=
5264: $metaentry{':'.$unikey.'.default'};
5265: }
5266: }
5267:
5268: sub metadata_generate_part0 {
5269: my ($metadata,$metacache,$uri) = @_;
5270: my %allnames;
5271: foreach my $metakey (sort keys %$metadata) {
5272: if ($metakey=~/^parameter\_(.*)/) {
5273: my $part=$$metacache{':'.$metakey.'.part'};
5274: my $name=$$metacache{':'.$metakey.'.name'};
5275: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
5276: $allnames{$name}=$part;
5277: }
5278: }
5279: }
5280: foreach my $name (keys(%allnames)) {
5281: $$metadata{"parameter_0_$name"}=1;
5282: my $key=":parameter_0_$name";
5283: $$metacache{"$key.part"}='0';
5284: $$metacache{"$key.name"}=$name;
5285: $$metacache{"$key.type"}=$$metacache{':parameter_'.
5286: $allnames{$name}.'_'.$name.
5287: '.type'};
5288: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
5289: '.display'};
5290: my $expr='[Part: '.$allnames{$name}.']';
5291: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
5292: $$metacache{"$key.display"}=$olddis;
5293: }
5294: }
5295:
5296: # ------------------------------------------------- Get the title of a resource
5297:
5298: sub gettitle {
5299: my $urlsymb=shift;
5300: my $symb=&symbread($urlsymb);
5301: if ($symb) {
5302: my $key=$env{'request.course.id'}."\0".$symb;
5303: my ($result,$cached)=&is_cached_new('title',$key);
5304: if (defined($cached)) {
5305: return $result;
5306: }
5307: my ($map,$resid,$url)=&decode_symb($symb);
5308: my $title='';
5309: my %bighash;
5310: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5311: &GDBM_READER(),0640)) {
5312: my $mapid=$bighash{'map_pc_'.&clutter($map)};
5313: $title=$bighash{'title_'.$mapid.'.'.$resid};
5314: untie %bighash;
5315: }
5316: $title=~s/\&colon\;/\:/gs;
5317: if ($title) {
5318: return &do_cache_new('title',$key,$title,600);
5319: }
5320: $urlsymb=$url;
5321: }
5322: my $title=&metadata($urlsymb,'title');
5323: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
5324: return $title;
5325: }
5326:
5327: sub get_slot {
5328: my ($which,$cnum,$cdom)=@_;
5329: if (!$cnum || !$cdom) {
5330: (undef,my $courseid)=&Apache::lonxml::whichuser();
5331: $cdom=$env{'course.'.$courseid.'.domain'};
5332: $cnum=$env{'course.'.$courseid.'.num'};
5333: }
5334: my %slotinfo=&get('slots',[$which],$cdom,$cnum);
5335: &Apache::lonhomework::showhash(%slotinfo);
5336: my ($tmp)=keys(%slotinfo);
5337: if ($tmp=~/^error:/) { return (); }
5338: if (ref($slotinfo{$which}) eq 'HASH') {
5339: return %{$slotinfo{$which}};
5340: }
5341: return $slotinfo{$which};
5342: }
5343: # ------------------------------------------------- Update symbolic store links
5344:
5345: sub symblist {
5346: my ($mapname,%newhash)=@_;
5347: $mapname=&deversion(&declutter($mapname));
5348: my %hash;
5349: if (($env{'request.course.fn'}) && (%newhash)) {
5350: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5351: &GDBM_WRCREAT(),0640)) {
5352: foreach (keys %newhash) {
5353: $hash{declutter($_)}=&encode_symb($mapname,$newhash{$_}->[1],
5354: $newhash{$_}->[0]);
5355: }
5356: if (untie(%hash)) {
5357: return 'ok';
5358: }
5359: }
5360: }
5361: return 'error';
5362: }
5363:
5364: # --------------------------------------------------------------- Verify a symb
5365:
5366: sub symbverify {
5367: my ($symb,$thisurl)=@_;
5368: my $thisfn=$thisurl;
5369: # wrapper not part of symbs
5370: $thisfn=~s/^\/adm\/wrapper//;
5371: $thisfn=~s/^\/adm\/coursedocs\/showdoc\///;
5372: $thisfn=&declutter($thisfn);
5373: # direct jump to resource in page or to a sequence - will construct own symbs
5374: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
5375: # check URL part
5376: my ($map,$resid,$url)=&decode_symb($symb);
5377:
5378: unless ($url eq $thisfn) { return 0; }
5379:
5380: $symb=&symbclean($symb);
5381: $thisurl=&deversion($thisurl);
5382: $thisfn=&deversion($thisfn);
5383:
5384: my %bighash;
5385: my $okay=0;
5386:
5387: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5388: &GDBM_READER(),0640)) {
5389: my $ids=$bighash{'ids_'.&clutter($thisurl)};
5390: unless ($ids) {
5391: $ids=$bighash{'ids_/'.$thisurl};
5392: }
5393: if ($ids) {
5394: # ------------------------------------------------------------------- Has ID(s)
5395: foreach (split(/\,/,$ids)) {
5396: my ($mapid,$resid)=split(/\./,$_);
5397: if (
5398: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
5399: eq $symb) {
5400: if (($env{'request.role.adv'}) ||
5401: $bighash{'encrypted_'.$_} eq $env{'request.enc'}) {
5402: $okay=1;
5403: }
5404: }
5405: }
5406: }
5407: untie(%bighash);
5408: }
5409: return $okay;
5410: }
5411:
5412: # --------------------------------------------------------------- Clean-up symb
5413:
5414: sub symbclean {
5415: my $symb=shift;
5416: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
5417: # remove version from map
5418: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
5419:
5420: # remove version from URL
5421: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
5422:
5423: # remove wrapper
5424:
5425: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
5426: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
5427: return $symb;
5428: }
5429:
5430: # ---------------------------------------------- Split symb to find map and url
5431:
5432: sub encode_symb {
5433: my ($map,$resid,$url)=@_;
5434: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
5435: }
5436:
5437: sub decode_symb {
5438: my $symb=shift;
5439: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
5440: my ($map,$resid,$url)=split(/___/,$symb);
5441: return (&fixversion($map),$resid,&fixversion($url));
5442: }
5443:
5444: sub fixversion {
5445: my $fn=shift;
5446: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
5447: my %bighash;
5448: my $uri=&clutter($fn);
5449: my $key=$env{'request.course.id'}.'_'.$uri;
5450: # is this cached?
5451: my ($result,$cached)=&is_cached_new('courseresversion',$key);
5452: if (defined($cached)) { return $result; }
5453: # unfortunately not cached, or expired
5454: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5455: &GDBM_READER(),0640)) {
5456: if ($bighash{'version_'.$uri}) {
5457: my $version=$bighash{'version_'.$uri};
5458: unless (($version eq 'mostrecent') ||
5459: ($version==&getversion($uri))) {
5460: $uri=~s/\.(\w+)$/\.$version\.$1/;
5461: }
5462: }
5463: untie %bighash;
5464: }
5465: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
5466: }
5467:
5468: sub deversion {
5469: my $url=shift;
5470: $url=~s/\.\d+\.(\w+)$/\.$1/;
5471: return $url;
5472: }
5473:
5474: # ------------------------------------------------------ Return symb list entry
5475:
5476: sub symbread {
5477: my ($thisfn,$donotrecurse)=@_;
5478: my $cache_str='request.symbread.cached.'.$thisfn;
5479: if (defined($env{$cache_str})) { return $env{$cache_str}; }
5480: # no filename provided? try from environment
5481: unless ($thisfn) {
5482: if ($env{'request.symb'}) {
5483: return $env{$cache_str}=&symbclean($env{'request.symb'});
5484: }
5485: $thisfn=$env{'request.filename'};
5486: }
5487: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
5488: # is that filename actually a symb? Verify, clean, and return
5489: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
5490: if (&symbverify($thisfn,$1)) {
5491: return $env{$cache_str}=&symbclean($thisfn);
5492: }
5493: }
5494: $thisfn=declutter($thisfn);
5495: my %hash;
5496: my %bighash;
5497: my $syval='';
5498: if (($env{'request.course.fn'}) && ($thisfn)) {
5499: my $targetfn = $thisfn;
5500: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
5501: $targetfn = 'adm/wrapper/'.$thisfn;
5502: }
5503: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
5504: $targetfn=$1;
5505: }
5506: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5507: &GDBM_READER(),0640)) {
5508: $syval=$hash{$targetfn};
5509: untie(%hash);
5510: }
5511: # ---------------------------------------------------------- There was an entry
5512: if ($syval) {
5513: #unless ($syval=~/\_\d+$/) {
5514: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
5515: #&appenv('request.ambiguous' => $thisfn);
5516: #return $env{$cache_str}='';
5517: #}
5518: #$syval.=$1;
5519: #}
5520: } else {
5521: # ------------------------------------------------------- Was not in symb table
5522: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5523: &GDBM_READER(),0640)) {
5524: # ---------------------------------------------- Get ID(s) for current resource
5525: my $ids=$bighash{'ids_'.&clutter($thisfn)};
5526: unless ($ids) {
5527: $ids=$bighash{'ids_/'.$thisfn};
5528: }
5529: unless ($ids) {
5530: # alias?
5531: $ids=$bighash{'mapalias_'.$thisfn};
5532: }
5533: if ($ids) {
5534: # ------------------------------------------------------------------- Has ID(s)
5535: my @possibilities=split(/\,/,$ids);
5536: if ($#possibilities==0) {
5537: # ----------------------------------------------- There is only one possibility
5538: my ($mapid,$resid)=split(/\./,$ids);
5539: $syval=&encode_symb($bighash{'map_id_'.$mapid},
5540: $resid,$thisfn);
5541: } elsif (!$donotrecurse) {
5542: # ------------------------------------------ There is more than one possibility
5543: my $realpossible=0;
5544: foreach (@possibilities) {
5545: my $file=$bighash{'src_'.$_};
5546: if (&allowed('bre',$file)) {
5547: my ($mapid,$resid)=split(/\./,$_);
5548: if ($bighash{'map_type_'.$mapid} ne 'page') {
5549: $realpossible++;
5550: $syval=&encode_symb($bighash{'map_id_'.$mapid},
5551: $resid,$thisfn);
5552: }
5553: }
5554: }
5555: if ($realpossible!=1) { $syval=''; }
5556: } else {
5557: $syval='';
5558: }
5559: }
5560: untie(%bighash)
5561: }
5562: }
5563: if ($syval) {
5564: return $env{$cache_str}=$syval;
5565: }
5566: }
5567: &appenv('request.ambiguous' => $thisfn);
5568: return $env{$cache_str}='';
5569: }
5570:
5571: # ---------------------------------------------------------- Return random seed
5572:
5573: sub numval {
5574: my $txt=shift;
5575: $txt=~tr/A-J/0-9/;
5576: $txt=~tr/a-j/0-9/;
5577: $txt=~tr/K-T/0-9/;
5578: $txt=~tr/k-t/0-9/;
5579: $txt=~tr/U-Z/0-5/;
5580: $txt=~tr/u-z/0-5/;
5581: $txt=~s/\D//g;
5582: if ($_64bit) { if ($txt > 2**32) { return -1; } }
5583: return int($txt);
5584: }
5585:
5586: sub numval2 {
5587: my $txt=shift;
5588: $txt=~tr/A-J/0-9/;
5589: $txt=~tr/a-j/0-9/;
5590: $txt=~tr/K-T/0-9/;
5591: $txt=~tr/k-t/0-9/;
5592: $txt=~tr/U-Z/0-5/;
5593: $txt=~tr/u-z/0-5/;
5594: $txt=~s/\D//g;
5595: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5596: my $total;
5597: foreach my $val (@txts) { $total+=$val; }
5598: if ($_64bit) { if ($total > 2**32) { return -1; } }
5599: return int($total);
5600: }
5601:
5602: sub numval3 {
5603: use integer;
5604: my $txt=shift;
5605: $txt=~tr/A-J/0-9/;
5606: $txt=~tr/a-j/0-9/;
5607: $txt=~tr/K-T/0-9/;
5608: $txt=~tr/k-t/0-9/;
5609: $txt=~tr/U-Z/0-5/;
5610: $txt=~tr/u-z/0-5/;
5611: $txt=~s/\D//g;
5612: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5613: my $total;
5614: foreach my $val (@txts) { $total+=$val; }
5615: if ($_64bit) { $total=(($total<<32)>>32); }
5616: return $total;
5617: }
5618:
5619: sub digest {
5620: my ($data)=@_;
5621: my $digest=&Digest::MD5::md5($data);
5622: my ($a,$b,$c,$d)=unpack("iiii",$digest);
5623: my ($e,$f);
5624: {
5625: use integer;
5626: $e=($a+$b);
5627: $f=($c+$d);
5628: if ($_64bit) {
5629: $e=(($e<<32)>>32);
5630: $f=(($f<<32)>>32);
5631: }
5632: }
5633: if (wantarray) {
5634: return ($e,$f);
5635: } else {
5636: my $g;
5637: {
5638: use integer;
5639: $g=($e+$f);
5640: if ($_64bit) {
5641: $g=(($g<<32)>>32);
5642: }
5643: }
5644: return $g;
5645: }
5646: }
5647:
5648: sub latest_rnd_algorithm_id {
5649: return '64bit5';
5650: }
5651:
5652: sub get_rand_alg {
5653: my ($courseid)=@_;
5654: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
5655: if ($courseid) {
5656: return $env{"course.$courseid.rndseed"};
5657: }
5658: return &latest_rnd_algorithm_id();
5659: }
5660:
5661: sub validCODE {
5662: my ($CODE)=@_;
5663: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
5664: return 0;
5665: }
5666:
5667: sub getCODE {
5668: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
5669: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
5670: defined($Apache::lonhomework::parsing_a_task) ) &&
5671: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
5672: return $Apache::lonhomework::history{'resource.CODE'};
5673: }
5674: return undef;
5675: }
5676:
5677: sub rndseed {
5678: my ($symb,$courseid,$domain,$username)=@_;
5679:
5680: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
5681: if (!$symb) {
5682: unless ($symb=$wsymb) { return time; }
5683: }
5684: if (!$courseid) { $courseid=$wcourseid; }
5685: if (!$domain) { $domain=$wdomain; }
5686: if (!$username) { $username=$wusername }
5687: my $which=&get_rand_alg();
5688: if (defined(&getCODE())) {
5689: if ($which eq '64bit5') {
5690: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
5691: } elsif ($which eq '64bit4') {
5692: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
5693: } else {
5694: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
5695: }
5696: } elsif ($which eq '64bit5') {
5697: return &rndseed_64bit5($symb,$courseid,$domain,$username);
5698: } elsif ($which eq '64bit4') {
5699: return &rndseed_64bit4($symb,$courseid,$domain,$username);
5700: } elsif ($which eq '64bit3') {
5701: return &rndseed_64bit3($symb,$courseid,$domain,$username);
5702: } elsif ($which eq '64bit2') {
5703: return &rndseed_64bit2($symb,$courseid,$domain,$username);
5704: } elsif ($which eq '64bit') {
5705: return &rndseed_64bit($symb,$courseid,$domain,$username);
5706: }
5707: return &rndseed_32bit($symb,$courseid,$domain,$username);
5708: }
5709:
5710: sub rndseed_32bit {
5711: my ($symb,$courseid,$domain,$username)=@_;
5712: {
5713: use integer;
5714: my $symbchck=unpack("%32C*",$symb) << 27;
5715: my $symbseed=numval($symb) << 22;
5716: my $namechck=unpack("%32C*",$username) << 17;
5717: my $nameseed=numval($username) << 12;
5718: my $domainseed=unpack("%32C*",$domain) << 7;
5719: my $courseseed=unpack("%32C*",$courseid);
5720: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
5721: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5722: #&Apache::lonxml::debug("rndseed :$num:$symb");
5723: if ($_64bit) { $num=(($num<<32)>>32); }
5724: return $num;
5725: }
5726: }
5727:
5728: sub rndseed_64bit {
5729: my ($symb,$courseid,$domain,$username)=@_;
5730: {
5731: use integer;
5732: my $symbchck=unpack("%32S*",$symb) << 21;
5733: my $symbseed=numval($symb) << 10;
5734: my $namechck=unpack("%32S*",$username);
5735:
5736: my $nameseed=numval($username) << 21;
5737: my $domainseed=unpack("%32S*",$domain) << 10;
5738: my $courseseed=unpack("%32S*",$courseid);
5739:
5740: my $num1=$symbchck+$symbseed+$namechck;
5741: my $num2=$nameseed+$domainseed+$courseseed;
5742: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5743: #&Apache::lonxml::debug("rndseed :$num:$symb");
5744: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5745: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5746: return "$num1,$num2";
5747: }
5748: }
5749:
5750: sub rndseed_64bit2 {
5751: my ($symb,$courseid,$domain,$username)=@_;
5752: {
5753: use integer;
5754: # strings need to be an even # of cahracters long, it it is odd the
5755: # last characters gets thrown away
5756: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5757: my $symbseed=numval($symb) << 10;
5758: my $namechck=unpack("%32S*",$username.' ');
5759:
5760: my $nameseed=numval($username) << 21;
5761: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5762: my $courseseed=unpack("%32S*",$courseid.' ');
5763:
5764: my $num1=$symbchck+$symbseed+$namechck;
5765: my $num2=$nameseed+$domainseed+$courseseed;
5766: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5767: #&Apache::lonxml::debug("rndseed :$num:$symb");
5768: return "$num1,$num2";
5769: }
5770: }
5771:
5772: sub rndseed_64bit3 {
5773: my ($symb,$courseid,$domain,$username)=@_;
5774: {
5775: use integer;
5776: # strings need to be an even # of cahracters long, it it is odd the
5777: # last characters gets thrown away
5778: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5779: my $symbseed=numval2($symb) << 10;
5780: my $namechck=unpack("%32S*",$username.' ');
5781:
5782: my $nameseed=numval2($username) << 21;
5783: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5784: my $courseseed=unpack("%32S*",$courseid.' ');
5785:
5786: my $num1=$symbchck+$symbseed+$namechck;
5787: my $num2=$nameseed+$domainseed+$courseseed;
5788: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5789: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5790: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5791:
5792: return "$num1:$num2";
5793: }
5794: }
5795:
5796: sub rndseed_64bit4 {
5797: my ($symb,$courseid,$domain,$username)=@_;
5798: {
5799: use integer;
5800: # strings need to be an even # of cahracters long, it it is odd the
5801: # last characters gets thrown away
5802: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5803: my $symbseed=numval3($symb) << 10;
5804: my $namechck=unpack("%32S*",$username.' ');
5805:
5806: my $nameseed=numval3($username) << 21;
5807: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5808: my $courseseed=unpack("%32S*",$courseid.' ');
5809:
5810: my $num1=$symbchck+$symbseed+$namechck;
5811: my $num2=$nameseed+$domainseed+$courseseed;
5812: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5813: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5814: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5815:
5816: return "$num1:$num2";
5817: }
5818: }
5819:
5820: sub rndseed_64bit5 {
5821: my ($symb,$courseid,$domain,$username)=@_;
5822: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
5823: return "$num1:$num2";
5824: }
5825:
5826: sub rndseed_CODE_64bit {
5827: my ($symb,$courseid,$domain,$username)=@_;
5828: {
5829: use integer;
5830: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5831: my $symbseed=numval2($symb);
5832: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5833: my $CODEseed=numval(&getCODE());
5834: my $courseseed=unpack("%32S*",$courseid.' ');
5835: my $num1=$symbseed+$CODEchck;
5836: my $num2=$CODEseed+$courseseed+$symbchck;
5837: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5838: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5839: if ($_64bit) { $num1=(($num1<<32)>>32); }
5840: if ($_64bit) { $num2=(($num2<<32)>>32); }
5841: return "$num1:$num2";
5842: }
5843: }
5844:
5845: sub rndseed_CODE_64bit4 {
5846: my ($symb,$courseid,$domain,$username)=@_;
5847: {
5848: use integer;
5849: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5850: my $symbseed=numval3($symb);
5851: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5852: my $CODEseed=numval3(&getCODE());
5853: my $courseseed=unpack("%32S*",$courseid.' ');
5854: my $num1=$symbseed+$CODEchck;
5855: my $num2=$CODEseed+$courseseed+$symbchck;
5856: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5857: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5858: if ($_64bit) { $num1=(($num1<<32)>>32); }
5859: if ($_64bit) { $num2=(($num2<<32)>>32); }
5860: return "$num1:$num2";
5861: }
5862: }
5863:
5864: sub rndseed_CODE_64bit5 {
5865: my ($symb,$courseid,$domain,$username)=@_;
5866: my $code = &getCODE();
5867: my ($num1,$num2)=&digest("$symb,$courseid,$code");
5868: return "$num1:$num2";
5869: }
5870:
5871: sub setup_random_from_rndseed {
5872: my ($rndseed)=@_;
5873: if ($rndseed =~/([,:])/) {
5874: my ($num1,$num2)=split(/[,:]/,$rndseed);
5875: &Math::Random::random_set_seed(abs($num1),abs($num2));
5876: } else {
5877: &Math::Random::random_set_seed_from_phrase($rndseed);
5878: }
5879: }
5880:
5881: sub latest_receipt_algorithm_id {
5882: return 'receipt2';
5883: }
5884:
5885: sub recunique {
5886: my $fucourseid=shift;
5887: my $unique;
5888: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5889: $unique=$env{"course.$fucourseid.internal.encseed"};
5890: } else {
5891: $unique=$perlvar{'lonReceipt'};
5892: }
5893: return unpack("%32C*",$unique);
5894: }
5895:
5896: sub recprefix {
5897: my $fucourseid=shift;
5898: my $prefix;
5899: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5900: $prefix=$env{"course.$fucourseid.internal.encpref"};
5901: } else {
5902: $prefix=$perlvar{'lonHostID'};
5903: }
5904: return unpack("%32C*",$prefix);
5905: }
5906:
5907: sub ireceipt {
5908: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
5909: my $cuname=unpack("%32C*",$funame);
5910: my $cudom=unpack("%32C*",$fudom);
5911: my $cucourseid=unpack("%32C*",$fucourseid);
5912: my $cusymb=unpack("%32C*",$fusymb);
5913: my $cunique=&recunique($fucourseid);
5914: my $cpart=unpack("%32S*",$part);
5915: my $return =&recprefix($fucourseid).'-';
5916: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
5917: $env{'request.state'} eq 'construct') {
5918: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
5919: " and ".($cpart%$cudom));
5920:
5921: $return.= ($cunique%$cuname+
5922: $cunique%$cudom+
5923: $cusymb%$cuname+
5924: $cusymb%$cudom+
5925: $cucourseid%$cuname+
5926: $cucourseid%$cudom+
5927: $cpart%$cuname+
5928: $cpart%$cudom);
5929: } else {
5930: $return.= ($cunique%$cuname+
5931: $cunique%$cudom+
5932: $cusymb%$cuname+
5933: $cusymb%$cudom+
5934: $cucourseid%$cuname+
5935: $cucourseid%$cudom);
5936: }
5937: return $return;
5938: }
5939:
5940: sub receipt {
5941: my ($part)=@_;
5942: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
5943: return &ireceipt($name,$domain,$courseid,$symb,$part);
5944: }
5945:
5946: # ------------------------------------------------------------ Serves up a file
5947: # returns either the contents of the file or
5948: # -1 if the file doesn't exist
5949: #
5950: # if the target is a file that was uploaded via DOCS,
5951: # a check will be made to see if a current copy exists on the local server,
5952: # if it does this will be served, otherwise a copy will be retrieved from
5953: # the home server for the course and stored in /home/httpd/html/userfiles on
5954: # the local server.
5955:
5956: sub getfile {
5957: my ($file) = @_;
5958: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
5959: &repcopy($file);
5960: return &readfile($file);
5961: }
5962:
5963: sub repcopy_userfile {
5964: my ($file)=@_;
5965: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
5966: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
5967: my ($cdom,$cnum,$filename) =
5968: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
5969: my ($info,$rtncode);
5970: my $uri="/uploaded/$cdom/$cnum/$filename";
5971: if (-e "$file") {
5972: my @fileinfo = stat($file);
5973: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
5974: if ($lwpresp ne 'ok') {
5975: if ($rtncode eq '404') {
5976: unlink($file);
5977: }
5978: #my $ua=new LWP::UserAgent;
5979: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5980: #my $response=$ua->request($request);
5981: #if ($response->is_success()) {
5982: # return $response->content;
5983: # } else {
5984: # return -1;
5985: # }
5986: return -1;
5987: }
5988: if ($info < $fileinfo[9]) {
5989: return 'ok';
5990: }
5991: $info = '';
5992: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5993: if ($lwpresp ne 'ok') {
5994: return -1;
5995: }
5996: } else {
5997: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5998: if ($lwpresp ne 'ok') {
5999: my $ua=new LWP::UserAgent;
6000: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6001: my $response=$ua->request($request);
6002: if ($response->is_success()) {
6003: $info=$response->content;
6004: } else {
6005: return -1;
6006: }
6007: }
6008: my @parts = ($cdom,$cnum);
6009: if ($filename =~ m|^(.+)/[^/]+$|) {
6010: push @parts, split(/\//,$1);
6011: }
6012: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
6013: foreach my $part (@parts) {
6014: $path .= '/'.$part;
6015: if (!-e $path) {
6016: mkdir($path,0770);
6017: }
6018: }
6019: }
6020: open(FILE,">$file");
6021: print FILE $info;
6022: close(FILE);
6023: return 'ok';
6024: }
6025:
6026: sub tokenwrapper {
6027: my $uri=shift;
6028: $uri=~s|^http\://([^/]+)||;
6029: $uri=~s|^/||;
6030: $env{'user.environment'}=~/\/([^\/]+)\.id/;
6031: my $token=$1;
6032: my (undef,$udom,$uname,$file)=split('/',$uri,4);
6033: if ($udom && $uname && $file) {
6034: $file=~s|(\?\.*)*$||;
6035: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
6036: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
6037: (($uri=~/\?/)?'&':'?').'token='.$token.
6038: '&tokenissued='.$perlvar{'lonHostID'};
6039: } else {
6040: return '/adm/notfound.html';
6041: }
6042: }
6043:
6044: sub getuploaded {
6045: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
6046: $uri=~s/^\///;
6047: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
6048: my $ua=new LWP::UserAgent;
6049: my $request=new HTTP::Request($reqtype,$uri);
6050: my $response=$ua->request($request);
6051: $$rtncode = $response->code;
6052: if (! $response->is_success()) {
6053: return 'failed';
6054: }
6055: if ($reqtype eq 'HEAD') {
6056: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
6057: } elsif ($reqtype eq 'GET') {
6058: $$info = $response->content;
6059: }
6060: return 'ok';
6061: }
6062:
6063: sub readfile {
6064: my $file = shift;
6065: if ( (! -e $file ) || ($file eq '') ) { return -1; };
6066: my $fh;
6067: open($fh,"<$file");
6068: my $a='';
6069: while (<$fh>) { $a .=$_; }
6070: return $a;
6071: }
6072:
6073: sub filelocation {
6074: my ($dir,$file) = @_;
6075: my $location;
6076: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
6077:
6078: if ($file =~ m-^/adm/-) {
6079: $file=~s-^/adm/wrapper/-/-;
6080: $file=~s-^/adm/coursedocs/showdoc/-/-;
6081: }
6082: if ($file=~m:^/~:) { # is a contruction space reference
6083: $location = $file;
6084: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
6085: } elsif ($file=~m:^/home/[^/]*/public_html/:) {
6086: # is a correct contruction space reference
6087: $location = $file;
6088: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
6089: my ($udom,$uname,$filename)=
6090: ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
6091: my $home=&homeserver($uname,$udom);
6092: my $is_me=0;
6093: my @ids=¤t_machine_ids();
6094: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
6095: if ($is_me) {
6096: $location=&Apache::loncommon::propath($udom,$uname).
6097: '/userfiles/'.$filename;
6098: } else {
6099: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
6100: $udom.'/'.$uname.'/'.$filename;
6101: }
6102: } else {
6103: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
6104: $file=~s:^/res/:/:;
6105: if ( !( $file =~ m:^/:) ) {
6106: $location = $dir. '/'.$file;
6107: } else {
6108: $location = '/home/httpd/html/res'.$file;
6109: }
6110: }
6111: $location=~s://+:/:g; # remove duplicate /
6112: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
6113: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
6114: return $location;
6115: }
6116:
6117: sub hreflocation {
6118: my ($dir,$file)=@_;
6119: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
6120: $file=filelocation($dir,$file);
6121: } elsif ($file=~m-^/adm/-) {
6122: $file=~s-^/adm/wrapper/-/-;
6123: $file=~s-^/adm/coursedocs/showdoc/-/-;
6124: }
6125: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
6126: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
6127: } elsif ($file=~m-/home/(\w+)/public_html/-) {
6128: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
6129: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
6130: $file=~s-^/home/httpd/lonUsers/([^/]*)/./././([^/]*)/userfiles/
6131: -/uploaded/$1/$2/-x;
6132: }
6133: return $file;
6134: }
6135:
6136: sub current_machine_domains {
6137: my $hostname=$hostname{$perlvar{'lonHostID'}};
6138: my @domains;
6139: while( my($id, $name) = each(%hostname)) {
6140: # &logthis("-$id-$name-$hostname-");
6141: if ($hostname eq $name) {
6142: push(@domains,$hostdom{$id});
6143: }
6144: }
6145: return @domains;
6146: }
6147:
6148: sub current_machine_ids {
6149: my $hostname=$hostname{$perlvar{'lonHostID'}};
6150: my @ids;
6151: while( my($id, $name) = each(%hostname)) {
6152: # &logthis("-$id-$name-$hostname-");
6153: if ($hostname eq $name) {
6154: push(@ids,$id);
6155: }
6156: }
6157: return @ids;
6158: }
6159:
6160: # ------------------------------------------------------------- Declutters URLs
6161:
6162: sub declutter {
6163: my $thisfn=shift;
6164: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
6165: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
6166: $thisfn=~s/^\///;
6167: $thisfn=~s|^adm/wrapper/||;
6168: $thisfn=~s|^adm/coursedocs/showdoc/||;
6169: $thisfn=~s/^res\///;
6170: $thisfn=~s/\?.+$//;
6171: return $thisfn;
6172: }
6173:
6174: # ------------------------------------------------------------- Clutter up URLs
6175:
6176: sub clutter {
6177: my $thisfn='/'.&declutter(shift);
6178: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
6179: $thisfn='/res'.$thisfn;
6180: }
6181: if ($thisfn !~m|/adm|) {
6182: if ($thisfn =~ m|/ext/|) {
6183: $thisfn='/adm/wrapper'.$thisfn;
6184: } else {
6185: my ($ext) = ($thisfn =~ /\.(\w+)$/);
6186: my $embstyle=&Apache::loncommon::fileembstyle($ext);
6187: if ($embstyle eq 'ssi'
6188: || ($embstyle eq 'hdn')
6189: || ($embstyle eq 'rat')
6190: || ($embstyle eq 'prv')
6191: || ($embstyle eq 'ign')) {
6192: #do nothing with these
6193: } elsif (($embstyle eq 'img')
6194: || ($embstyle eq 'emb')
6195: || ($embstyle eq 'wrp')) {
6196: $thisfn='/adm/wrapper'.$thisfn;
6197: } elsif ($embstyle eq 'unk'
6198: && $thisfn!~/\.(sequence|page)$/) {
6199: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
6200: } else {
6201: &logthis("Got a blank emb style");
6202: }
6203: }
6204: }
6205: return $thisfn;
6206: }
6207:
6208: sub freeze_escape {
6209: my ($value)=@_;
6210: if (ref($value)) {
6211: $value=&nfreeze($value);
6212: return '__FROZEN__'.&escape($value);
6213: }
6214: return &escape($value);
6215: }
6216:
6217: # -------------------------------------------------------- Escape Special Chars
6218:
6219: sub escape {
6220: my $str=shift;
6221: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
6222: return $str;
6223: }
6224:
6225: # ----------------------------------------------------- Un-Escape Special Chars
6226:
6227: sub unescape {
6228: my $str=shift;
6229: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
6230: return $str;
6231: }
6232:
6233: sub thaw_unescape {
6234: my ($value)=@_;
6235: if ($value =~ /^__FROZEN__/) {
6236: substr($value,0,10,undef);
6237: $value=&unescape($value);
6238: return &thaw($value);
6239: }
6240: return &unescape($value);
6241: }
6242:
6243: sub correct_line_ends {
6244: my ($result)=@_;
6245: $$result =~s/\r\n/\n/mg;
6246: $$result =~s/\r/\n/mg;
6247: }
6248: # ================================================================ Main Program
6249:
6250: sub goodbye {
6251: &logthis("Starting Shut down");
6252: #not converted to using infrastruture and probably shouldn't be
6253: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
6254: #converted
6255: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
6256: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
6257: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
6258: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
6259: #1.1 only
6260: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
6261: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
6262: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
6263: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
6264: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
6265: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
6266: &logthis(sprintf("%-20s is %s",'hits',$hits));
6267: &flushcourselogs();
6268: &logthis("Shutting down");
6269: return DONE;
6270: }
6271:
6272: BEGIN {
6273: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
6274: unless ($readit) {
6275: {
6276: # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
6277: open(my $config,"</etc/httpd/conf/loncapa.conf");
6278:
6279: while (my $configline=<$config>) {
6280: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
6281: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
6282: chomp($varvalue);
6283: $perlvar{$varname}=$varvalue;
6284: }
6285: }
6286: close($config);
6287: }
6288: {
6289: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
6290:
6291: while (my $configline=<$config>) {
6292: if ($configline =~ /^[^\#]*PerlSetVar/) {
6293: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
6294: chomp($varvalue);
6295: $perlvar{$varname}=$varvalue;
6296: }
6297: }
6298: close($config);
6299: }
6300:
6301: # ------------------------------------------------------------ Read domain file
6302: {
6303: %domaindescription = ();
6304: %domain_auth_def = ();
6305: %domain_auth_arg_def = ();
6306: my $fh;
6307: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
6308: while (<$fh>) {
6309: next if (/^(\#|\s*$)/);
6310: # next if /^\#/;
6311: chomp;
6312: my ($domain, $domain_description, $def_auth, $def_auth_arg,
6313: $def_lang, $city, $longi, $lati, $primary) = split(/:/,$_);
6314: $domain_auth_def{$domain}=$def_auth;
6315: $domain_auth_arg_def{$domain}=$def_auth_arg;
6316: $domaindescription{$domain}=$domain_description;
6317: $domain_lang_def{$domain}=$def_lang;
6318: $domain_city{$domain}=$city;
6319: $domain_longi{$domain}=$longi;
6320: $domain_lati{$domain}=$lati;
6321: $domain_primary{$domain}=$primary;
6322:
6323: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
6324: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
6325: }
6326: }
6327: close ($fh);
6328: }
6329:
6330:
6331: # ------------------------------------------------------------- Read hosts file
6332: {
6333: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
6334:
6335: while (my $configline=<$config>) {
6336: next if ($configline =~ /^(\#|\s*$)/);
6337: chomp($configline);
6338: my ($id,$domain,$role,$name)=split(/:/,$configline);
6339: $name=~s/\s//g;
6340: if ($id && $domain && $role && $name) {
6341: $hostname{$id}=$name;
6342: $hostdom{$id}=$domain;
6343: if ($role eq 'library') { $libserv{$id}=$name; }
6344: }
6345: }
6346: close($config);
6347: # FIXME: dev server don't want this, production servers _do_ want this
6348: #&get_iphost();
6349: }
6350:
6351: sub get_iphost {
6352: if (%iphost) { return %iphost; }
6353: my %name_to_ip;
6354: foreach my $id (keys(%hostname)) {
6355: my $name=$hostname{$id};
6356: my $ip;
6357: if (!exists($name_to_ip{$name})) {
6358: $ip = gethostbyname($name);
6359: if (!$ip || length($ip) ne 4) {
6360: &logthis("Skipping host $id name $name no IP found\n");
6361: next;
6362: }
6363: $ip=inet_ntoa($ip);
6364: $name_to_ip{$name} = $ip;
6365: } else {
6366: $ip = $name_to_ip{$name};
6367: }
6368: push(@{$iphost{$ip}},$id);
6369: }
6370: return %iphost;
6371: }
6372:
6373: # ------------------------------------------------------ Read spare server file
6374: {
6375: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
6376:
6377: while (my $configline=<$config>) {
6378: chomp($configline);
6379: if ($configline) {
6380: $spareid{$configline}=1;
6381: }
6382: }
6383: close($config);
6384: }
6385: # ------------------------------------------------------------ Read permissions
6386: {
6387: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
6388:
6389: while (my $configline=<$config>) {
6390: chomp($configline);
6391: if ($configline) {
6392: my ($role,$perm)=split(/ /,$configline);
6393: if ($perm ne '') { $pr{$role}=$perm; }
6394: }
6395: }
6396: close($config);
6397: }
6398:
6399: # -------------------------------------------- Read plain texts for permissions
6400: {
6401: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
6402:
6403: while (my $configline=<$config>) {
6404: chomp($configline);
6405: if ($configline) {
6406: my ($short,$plain)=split(/:/,$configline);
6407: if ($plain ne '') { $prp{$short}=$plain; }
6408: }
6409: }
6410: close($config);
6411: }
6412:
6413: # ---------------------------------------------------------- Read package table
6414: {
6415: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
6416:
6417: while (my $configline=<$config>) {
6418: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
6419: chomp($configline);
6420: my ($short,$plain)=split(/:/,$configline);
6421: my ($pack,$name)=split(/\&/,$short);
6422: if ($plain ne '') {
6423: $packagetab{$pack.'&'.$name.'&name'}=$name;
6424: $packagetab{$short}=$plain;
6425: }
6426: }
6427: close($config);
6428: }
6429:
6430: # ------------- set up temporary directory
6431: {
6432: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
6433:
6434: }
6435:
6436: $memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
6437:
6438: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
6439: $dumpcount=0;
6440:
6441: &logtouch();
6442: &logthis('<font color="yellow">INFO: Read configuration</font>');
6443: $readit=1;
6444: {
6445: use integer;
6446: my $test=(2**32)+1;
6447: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
6448: &logthis(" Detected 64bit platform ($_64bit)");
6449: }
6450: }
6451: }
6452:
6453: 1;
6454: __END__
6455:
6456: =pod
6457:
6458: =head1 NAME
6459:
6460: Apache::lonnet - Subroutines to ask questions about things in the network.
6461:
6462: =head1 SYNOPSIS
6463:
6464: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
6465:
6466: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
6467:
6468: Common parameters:
6469:
6470: =over 4
6471:
6472: =item *
6473:
6474: $uname : an internal username (if $cname expecting a course Id specifically)
6475:
6476: =item *
6477:
6478: $udom : a domain (if $cdom expecting a course's domain specifically)
6479:
6480: =item *
6481:
6482: $symb : a resource instance identifier
6483:
6484: =item *
6485:
6486: $namespace : the name of a .db file that contains the data needed or
6487: being set.
6488:
6489: =back
6490:
6491: =head1 OVERVIEW
6492:
6493: lonnet provides subroutines which interact with the
6494: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
6495: about classes, users, and resources.
6496:
6497: For many of these objects you can also use this to store data about
6498: them or modify them in various ways.
6499:
6500: =head2 Symbs
6501:
6502: To identify a specific instance of a resource, LON-CAPA uses symbols
6503: or "symbs"X<symb>. These identifiers are built from the URL of the
6504: map, the resource number of the resource in the map, and the URL of
6505: the resource itself. The latter is somewhat redundant, but might help
6506: if maps change.
6507:
6508: An example is
6509:
6510: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
6511:
6512: The respective map entry is
6513:
6514: <resource id="19" src="/res/msu/korte/tests/part12.problem"
6515: title="Problem 2">
6516: </resource>
6517:
6518: Symbs are used by the random number generator, as well as to store and
6519: restore data specific to a certain instance of for example a problem.
6520:
6521: =head2 Storing And Retrieving Data
6522:
6523: X<store()>X<cstore()>X<restore()>Three of the most important functions
6524: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
6525: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
6526: is is the non-critical message twin of cstore. These functions are for
6527: handlers to store a perl hash to a user's permanent data space in an
6528: easy manner, and to retrieve it again on another call. It is expected
6529: that a handler would use this once at the beginning to retrieve data,
6530: and then again once at the end to send only the new data back.
6531:
6532: The data is stored in the user's data directory on the user's
6533: homeserver under the ID of the course.
6534:
6535: The hash that is returned by restore will have all of the previous
6536: value for all of the elements of the hash.
6537:
6538: Example:
6539:
6540: #creating a hash
6541: my %hash;
6542: $hash{'foo'}='bar';
6543:
6544: #storing it
6545: &Apache::lonnet::cstore(\%hash);
6546:
6547: #changing a value
6548: $hash{'foo'}='notbar';
6549:
6550: #adding a new value
6551: $hash{'bar'}='foo';
6552: &Apache::lonnet::cstore(\%hash);
6553:
6554: #retrieving the hash
6555: my %history=&Apache::lonnet::restore();
6556:
6557: #print the hash
6558: foreach my $key (sort(keys(%history))) {
6559: print("\%history{$key} = $history{$key}");
6560: }
6561:
6562: Will print out:
6563:
6564: %history{1:foo} = bar
6565: %history{1:keys} = foo:timestamp
6566: %history{1:timestamp} = 990455579
6567: %history{2:bar} = foo
6568: %history{2:foo} = notbar
6569: %history{2:keys} = foo:bar:timestamp
6570: %history{2:timestamp} = 990455580
6571: %history{bar} = foo
6572: %history{foo} = notbar
6573: %history{timestamp} = 990455580
6574: %history{version} = 2
6575:
6576: Note that the special hash entries C<keys>, C<version> and
6577: C<timestamp> were added to the hash. C<version> will be equal to the
6578: total number of versions of the data that have been stored. The
6579: C<timestamp> attribute will be the UNIX time the hash was
6580: stored. C<keys> is available in every historical section to list which
6581: keys were added or changed at a specific historical revision of a
6582: hash.
6583:
6584: B<Warning>: do not store the hash that restore returns directly. This
6585: will cause a mess since it will restore the historical keys as if the
6586: were new keys. I.E. 1:foo will become 1:1:foo etc.
6587:
6588: Calling convention:
6589:
6590: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
6591: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
6592:
6593: For more detailed information, see lonnet specific documentation.
6594:
6595: =head1 RETURN MESSAGES
6596:
6597: =over 4
6598:
6599: =item * B<con_lost>: unable to contact remote host
6600:
6601: =item * B<con_delayed>: unable to contact remote host, message will be delivered
6602: when the connection is brought back up
6603:
6604: =item * B<con_failed>: unable to contact remote host and unable to save message
6605: for later delivery
6606:
6607: =item * B<error:>: an error a occured, a description of the error follows the :
6608:
6609: =item * B<no_such_host>: unable to fund a host associated with the user/domain
6610: that was requested
6611:
6612: =back
6613:
6614: =head1 PUBLIC SUBROUTINES
6615:
6616: =head2 Session Environment Functions
6617:
6618: =over 4
6619:
6620: =item *
6621: X<appenv()>
6622: B<appenv(%hash)>: the value of %hash is written to
6623: the user envirnoment file, and will be restored for each access this
6624: user makes during this session, also modifies the %env for the current
6625: process
6626:
6627: =item *
6628: X<delenv()>
6629: B<delenv($regexp)>: removes all items from the session
6630: environment file that matches the regular expression in $regexp. The
6631: values are also delted from the current processes %env.
6632:
6633: =back
6634:
6635: =head2 User Information
6636:
6637: =over 4
6638:
6639: =item *
6640: X<queryauthenticate()>
6641: B<queryauthenticate($uname,$udom)>: try to determine user's current
6642: authentication scheme
6643:
6644: =item *
6645: X<authenticate()>
6646: B<authenticate($uname,$upass,$udom)>: try to
6647: authenticate user from domain's lib servers (first use the current
6648: one). C<$upass> should be the users password.
6649:
6650: =item *
6651: X<homeserver()>
6652: B<homeserver($uname,$udom)>: find the server which has
6653: the user's directory and files (there must be only one), this caches
6654: the answer, and also caches if there is a borken connection.
6655:
6656: =item *
6657: X<idget()>
6658: B<idget($udom,@ids)>: find the usernames behind a list of IDs
6659: (IDs are a unique resource in a domain, there must be only 1 ID per
6660: username, and only 1 username per ID in a specific domain) (returns
6661: hash: id=>name,id=>name)
6662:
6663: =item *
6664: X<idrget()>
6665: B<idrget($udom,@unames)>: find the IDs behind a list of
6666: usernames (returns hash: name=>id,name=>id)
6667:
6668: =item *
6669: X<idput()>
6670: B<idput($udom,%ids)>: store away a list of names and associated IDs
6671:
6672: =item *
6673: X<rolesinit()>
6674: B<rolesinit($udom,$username,$authhost)>: get user privileges
6675:
6676: =item *
6677: X<getsection()>
6678: B<getsection($udom,$uname,$cname)>: finds the section of student in the
6679: course $cname, return section name/number or '' for "not in course"
6680: and '-1' for "no section"
6681:
6682: =item *
6683: X<userenvironment()>
6684: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
6685: passed in @what from the requested user's environment, returns a hash
6686:
6687: =back
6688:
6689: =head2 User Roles
6690:
6691: =over 4
6692:
6693: =item *
6694:
6695: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
6696: actions
6697: F: full access
6698: U,I,K: authentication modes (cxx only)
6699: '': forbidden
6700: 1: user needs to choose course
6701: 2: browse allowed
6702:
6703: =item *
6704:
6705: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
6706: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
6707: and course level
6708:
6709: =item *
6710:
6711: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
6712: explanation of a user role term
6713:
6714: =back
6715:
6716: =head2 User Modification
6717:
6718: =over 4
6719:
6720: =item *
6721:
6722: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
6723: user for the level given by URL. Optional start and end dates (leave empty
6724: string or zero for "no date")
6725:
6726: =item *
6727:
6728: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
6729: change a users, password, possible return values are: ok,
6730: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
6731: refused
6732:
6733: =item *
6734:
6735: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
6736:
6737: =item *
6738:
6739: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
6740: modify user
6741:
6742: =item *
6743:
6744: modifystudent
6745:
6746: modify a students enrollment and identification information.
6747: The course id is resolved based on the current users environment.
6748: This means the envoking user must be a course coordinator or otherwise
6749: associated with a course.
6750:
6751: This call is essentially a wrapper for lonnet::modifyuser and
6752: lonnet::modify_student_enrollment
6753:
6754: Inputs:
6755:
6756: =over 4
6757:
6758: =item B<$udom> Students loncapa domain
6759:
6760: =item B<$uname> Students loncapa login name
6761:
6762: =item B<$uid> Students id/student number
6763:
6764: =item B<$umode> Students authentication mode
6765:
6766: =item B<$upass> Students password
6767:
6768: =item B<$first> Students first name
6769:
6770: =item B<$middle> Students middle name
6771:
6772: =item B<$last> Students last name
6773:
6774: =item B<$gene> Students generation
6775:
6776: =item B<$usec> Students section in course
6777:
6778: =item B<$end> Unix time of the roles expiration
6779:
6780: =item B<$start> Unix time of the roles start date
6781:
6782: =item B<$forceid> If defined, allow $uid to be changed
6783:
6784: =item B<$desiredhome> server to use as home server for student
6785:
6786: =back
6787:
6788: =item *
6789:
6790: modify_student_enrollment
6791:
6792: Change a students enrollment status in a class. The environment variable
6793: 'role.request.course' must be defined for this function to proceed.
6794:
6795: Inputs:
6796:
6797: =over 4
6798:
6799: =item $udom, students domain
6800:
6801: =item $uname, students name
6802:
6803: =item $uid, students user id
6804:
6805: =item $first, students first name
6806:
6807: =item $middle
6808:
6809: =item $last
6810:
6811: =item $gene
6812:
6813: =item $usec
6814:
6815: =item $end
6816:
6817: =item $start
6818:
6819: =back
6820:
6821:
6822: =item *
6823:
6824: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
6825: custom role; give a custom role to a user for the level given by URL. Specify
6826: name and domain of role author, and role name
6827:
6828: =item *
6829:
6830: revokerole($udom,$uname,$url,$role) : revoke a role for url
6831:
6832: =item *
6833:
6834: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
6835:
6836: =back
6837:
6838: =head2 Course Infomation
6839:
6840: =over 4
6841:
6842: =item *
6843:
6844: coursedescription($courseid) : returns a hash of information about the
6845: specified course id, including all environment settings for the
6846: course, the description of the course will be in the hash under the
6847: key 'description'
6848:
6849: =item *
6850:
6851: resdata($name,$domain,$type,@which) : request for current parameter
6852: setting for a specific $type, where $type is either 'course' or 'user',
6853: @what should be a list of parameters to ask about. This routine caches
6854: answers for 5 minutes.
6855:
6856: =back
6857:
6858: =head2 Course Modification
6859:
6860: =over 4
6861:
6862: =item *
6863:
6864: writecoursepref($courseid,%prefs) : write preferences (environment
6865: database) for a course
6866:
6867: =item *
6868:
6869: createcourse($udom,$description,$url) : make/modify course
6870:
6871: =back
6872:
6873: =head2 Resource Subroutines
6874:
6875: =over 4
6876:
6877: =item *
6878:
6879: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
6880:
6881: =item *
6882:
6883: repcopy($filename) : subscribes to the requested file, and attempts to
6884: replicate from the owning library server, Might return
6885: 'unavailable', 'not_found', 'forbidden', 'ok', or
6886: 'bad_request', also attempts to grab the metadata for the
6887: resource. Expects the local filesystem pathname
6888: (/home/httpd/html/res/....)
6889:
6890: =back
6891:
6892: =head2 Resource Information
6893:
6894: =over 4
6895:
6896: =item *
6897:
6898: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
6899: a vairety of different possible values, $varname should be a request
6900: string, and the other parameters can be used to specify who and what
6901: one is asking about.
6902:
6903: Possible values for $varname are environment.lastname (or other item
6904: from the envirnment hash), user.name (or someother aspect about the
6905: user), resource.0.maxtries (or some other part and parameter of a
6906: resource)
6907:
6908: =item *
6909:
6910: directcondval($number) : get current value of a condition; reads from a state
6911: string
6912:
6913: =item *
6914:
6915: condval($condidx) : value of condition index based on state
6916:
6917: =item *
6918:
6919: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
6920: resource's metadata, $what should be either a specific key, or either
6921: 'keys' (to get a list of possible keys) or 'packages' to get a list of
6922: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
6923:
6924: this function automatically caches all requests
6925:
6926: =item *
6927:
6928: metadata_query($query,$custom,$customshow) : make a metadata query against the
6929: network of library servers; returns file handle of where SQL and regex results
6930: will be stored for query
6931:
6932: =item *
6933:
6934: symbread($filename) : return symbolic list entry (filename argument optional);
6935: returns the data handle
6936:
6937: =item *
6938:
6939: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
6940: a possible symb for the URL in $thisfn, and if is an encryypted
6941: resource that the user accessed using /enc/ returns a 1 on success, 0
6942: on failure, user must be in a course, as it assumes the existance of
6943: the course initial hash, and uses $env('request.course.id'}
6944:
6945:
6946: =item *
6947:
6948: symbclean($symb) : removes versions numbers from a symb, returns the
6949: cleaned symb
6950:
6951: =item *
6952:
6953: is_on_map($uri) : checks if the $uri is somewhere on the current
6954: course map, user must be in a course for it to work.
6955:
6956: =item *
6957:
6958: numval($salt) : return random seed value (addend for rndseed)
6959:
6960: =item *
6961:
6962: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
6963: a random seed, all arguments are optional, if they aren't sent it uses the
6964: environment to derive them. Note: if symb isn't sent and it can't get one
6965: from &symbread it will use the current time as its return value
6966:
6967: =item *
6968:
6969: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
6970: unfakeable, receipt
6971:
6972: =item *
6973:
6974: receipt() : API to ireceipt working off of env values; given out to users
6975:
6976: =item *
6977:
6978: countacc($url) : count the number of accesses to a given URL
6979:
6980: =item *
6981:
6982: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
6983:
6984: =item *
6985:
6986: checkin($token) : updates that a resource has beeen returned (a hard copy version for instance) and returns the data that $token was Checkout with ($symb, $tuname, $tudom, and $tcrsid)
6987:
6988: =item *
6989:
6990: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
6991:
6992: =item *
6993:
6994: devalidate($symb) : devalidate temporary spreadsheet calculations,
6995: forcing spreadsheet to reevaluate the resource scores next time.
6996:
6997: =back
6998:
6999: =head2 Storing/Retreiving Data
7000:
7001: =over 4
7002:
7003: =item *
7004:
7005: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
7006: for this url; hashref needs to be given and should be a \%hashname; the
7007: remaining args aren't required and if they aren't passed or are '' they will
7008: be derived from the env
7009:
7010: =item *
7011:
7012: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
7013: uses critical subroutine
7014:
7015: =item *
7016:
7017: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
7018: all args are optional
7019:
7020: =item *
7021:
7022: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
7023: works very similar to store/cstore, but all data is stored in a
7024: temporary location and can be reset using tmpreset, $storehash should
7025: be a hash reference, returns nothing on success
7026:
7027: =item *
7028:
7029: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
7030: similar to restore, but all data is stored in a temporary location and
7031: can be reset using tmpreset. Returns a hash of values on success,
7032: error string otherwise.
7033:
7034: =item *
7035:
7036: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
7037: deltes all keys for $symb form the temporary storage hash.
7038:
7039: =item *
7040:
7041: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7042: reference filled in from namesp ($udom and $uname are optional)
7043:
7044: =item *
7045:
7046: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
7047: namesp ($udom and $uname are optional)
7048:
7049: =item *
7050:
7051: dump($namespace,$udom,$uname,$regexp,$range) :
7052: dumps the complete (or key matching regexp) namespace into a hash
7053: ($udom, $uname, $regexp, $range are optional)
7054:
7055: $range should be either an integer '100' (give me the first 100
7056: matching records)
7057: or be two integers sperated by a - with no spaces
7058: '30-50' (give me the 30th through the 50th matching
7059: records)
7060: =item *
7061:
7062: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
7063: $store can be a scalar, an array reference, or if the amount to be
7064: incremented is > 1, a hash reference.
7065:
7066: ($udom and $uname are optional)
7067:
7068: =item *
7069:
7070: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
7071: ($udom and $uname are optional)
7072:
7073: =item *
7074:
7075: putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
7076: keys used in storehash include version information (e.g., 1:$symb:message etc.) as
7077: used in records written by &store and retrieved by &restore. This function
7078: was created for use in editing discussion posts, without incrementing the
7079: version number included in the key for a particular post. The colon
7080: separated list of attribute names (e.g., the value associated with the key
7081: 1:keys:$symb) is also generated and passed in the ampersand separated
7082: items sent to lonnet::reply().
7083:
7084: =item *
7085:
7086: cput($namespace,$storehash,$udom,$uname) : critical put
7087: ($udom and $uname are optional)
7088:
7089: =item *
7090:
7091: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7092: reference filled in from namesp (encrypts the return communication)
7093: ($udom and $uname are optional)
7094:
7095: =item *
7096:
7097: log($udom,$name,$home,$message) : write to permanent log for user; use
7098: critical subroutine
7099:
7100: =back
7101:
7102: =head2 Network Status Functions
7103:
7104: =over 4
7105:
7106: =item *
7107:
7108: dirlist($uri) : return directory list based on URI
7109:
7110: =item *
7111:
7112: spareserver() : find server with least workload from spare.tab
7113:
7114: =back
7115:
7116: =head2 Apache Request
7117:
7118: =over 4
7119:
7120: =item *
7121:
7122: ssi($url,%hash) : server side include, does a complete request cycle on url to
7123: localhost, posts hash
7124:
7125: =back
7126:
7127: =head2 Data to String to Data
7128:
7129: =over 4
7130:
7131: =item *
7132:
7133: hash2str(%hash) : convert a hash into a string complete with escaping and '='
7134: and '&' separators, supports elements that are arrayrefs and hashrefs
7135:
7136: =item *
7137:
7138: hashref2str($hashref) : convert a hashref into a string complete with
7139: escaping and '=' and '&' separators, supports elements that are
7140: arrayrefs and hashrefs
7141:
7142: =item *
7143:
7144: arrayref2str($arrayref) : convert an arrayref into a string complete
7145: with escaping and '&' separators, supports elements that are arrayrefs
7146: and hashrefs
7147:
7148: =item *
7149:
7150: str2hash($string) : convert string to hash using unescaping and
7151: splitting on '=' and '&', supports elements that are arrayrefs and
7152: hashrefs
7153:
7154: =item *
7155:
7156: str2array($string) : convert string to hash using unescaping and
7157: splitting on '&', supports elements that are arrayrefs and hashrefs
7158:
7159: =back
7160:
7161: =head2 Logging Routines
7162:
7163: =over 4
7164:
7165: These routines allow one to make log messages in the lonnet.log and
7166: lonnet.perm logfiles.
7167:
7168: =item *
7169:
7170: logtouch() : make sure the logfile, lonnet.log, exists
7171:
7172: =item *
7173:
7174: logthis() : append message to the normal lonnet.log file, it gets
7175: preiodically rolled over and deleted.
7176:
7177: =item *
7178:
7179: logperm() : append a permanent message to lonnet.perm.log, this log
7180: file never gets deleted by any automated portion of the system, only
7181: messages of critical importance should go in here.
7182:
7183: =back
7184:
7185: =head2 General File Helper Routines
7186:
7187: =over 4
7188:
7189: =item *
7190:
7191: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
7192: (a) files in /uploaded
7193: (i) If a local copy of the file exists -
7194: compares modification date of local copy with last-modified date for
7195: definitive version stored on home server for course. If local copy is
7196: stale, requests a new version from the home server and stores it.
7197: If the original has been removed from the home server, then local copy
7198: is unlinked.
7199: (ii) If local copy does not exist -
7200: requests the file from the home server and stores it.
7201:
7202: If $caller is 'uploadrep':
7203: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
7204: for request for files originally uploaded via DOCS.
7205: - returns 'ok' if fresh local copy now available, -1 otherwise.
7206:
7207: Otherwise:
7208: This indicates a call from the content generation phase of the request.
7209: - returns the entire contents of the file or -1.
7210:
7211: (b) files in /res
7212: - returns the entire contents of a file or -1;
7213: it properly subscribes to and replicates the file if neccessary.
7214:
7215: =item *
7216:
7217: filelocation($dir,$file) : returns file system location of a file
7218: based on URI; meant to be "fairly clean" absolute reference, $dir is a
7219: directory that relative $file lookups are to looked in ($dir of /a/dir
7220: and a file of ../bob will become /a/bob)
7221:
7222: =item *
7223:
7224: hreflocation($dir,$file) : returns file system location or a URL; same as
7225: filelocation except for hrefs
7226:
7227: =item *
7228:
7229: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
7230:
7231: =back
7232:
7233: =head2 Usererfile file routines (/uploaded*)
7234:
7235: =over 4
7236:
7237: =item *
7238:
7239: userfileupload(): main rotine for putting a file in a user or course's
7240: filespace, arguments are,
7241:
7242: formname - required - this is the name of the element in $env where the
7243: filename, and the contents of the file to create/modifed exist
7244: the filename is in $env{'form.'.$formname.'.filename'} and the
7245: contents of the file is located in $env{'form.'.$formname}
7246: coursedoc - if true, store the file in the course of the active role
7247: of the current user
7248: subdir - required - subdirectory to put the file in under ../userfiles/
7249: if undefined, it will be placed in "unknown"
7250:
7251: (This routine calls clean_filename() to remove any dangerous
7252: characters from the filename, and then calls finuserfileupload() to
7253: complete the transaction)
7254:
7255: returns either the url of the uploaded file (/uploaded/....) if successful
7256: and /adm/notfound.html if unsuccessful
7257:
7258: =item *
7259:
7260: clean_filename(): routine for cleaing a filename up for storage in
7261: userfile space, argument is:
7262:
7263: filename - proposed filename
7264:
7265: returns: the new clean filename
7266:
7267: =item *
7268:
7269: finishuserfileupload(): routine that creaes and sends the file to
7270: userspace, probably shouldn't be called directly
7271:
7272: docuname: username or courseid of destination for the file
7273: docudom: domain of user/course of destination for the file
7274: formname: same as for userfileupload()
7275: fname: filename (inculding subdirectories) for the file
7276:
7277: returns either the url of the uploaded file (/uploaded/....) if successful
7278: and /adm/notfound.html if unsuccessful
7279:
7280: =item *
7281:
7282: renameuserfile(): renames an existing userfile to a new name
7283:
7284: Args:
7285: docuname: username or courseid of destination for the file
7286: docudom: domain of user/course of destination for the file
7287: old: current file name (including any subdirs under userfiles)
7288: new: desired file name (including any subdirs under userfiles)
7289:
7290: =item *
7291:
7292: mkdiruserfile(): creates a directory is a userfiles dir
7293:
7294: Args:
7295: docuname: username or courseid of destination for the file
7296: docudom: domain of user/course of destination for the file
7297: dir: dir to create (including any subdirs under userfiles)
7298:
7299: =item *
7300:
7301: removeuserfile(): removes a file that exists in userfiles
7302:
7303: Args:
7304: docuname: username or courseid of destination for the file
7305: docudom: domain of user/course of destination for the file
7306: fname: filname to delete (including any subdirs under userfiles)
7307:
7308: =item *
7309:
7310: removeuploadedurl(): convience function for removeuserfile()
7311:
7312: Args:
7313: url: a full /uploaded/... url to delete
7314:
7315: =back
7316:
7317: =head2 HTTP Helper Routines
7318:
7319: =over 4
7320:
7321: =item *
7322:
7323: escape() : unpack non-word characters into CGI-compatible hex codes
7324:
7325: =item *
7326:
7327: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
7328:
7329: =back
7330:
7331: =head1 PRIVATE SUBROUTINES
7332:
7333: =head2 Underlying communication routines (Shouldn't call)
7334:
7335: =over 4
7336:
7337: =item *
7338:
7339: subreply() : tries to pass a message to lonc, returns con_lost if incapable
7340:
7341: =item *
7342:
7343: reply() : uses subreply to send a message to remote machine, logs all failures
7344:
7345: =item *
7346:
7347: critical() : passes a critical message to another server; if cannot
7348: get through then place message in connection buffer directory and
7349: returns con_delayed, if incapable of saving message, returns
7350: con_failed
7351:
7352: =item *
7353:
7354: reconlonc() : tries to reconnect lonc client processes.
7355:
7356: =back
7357:
7358: =head2 Resource Access Logging
7359:
7360: =over 4
7361:
7362: =item *
7363:
7364: flushcourselogs() : flush (save) buffer logs and access logs
7365:
7366: =item *
7367:
7368: courselog($what) : save message for course in hash
7369:
7370: =item *
7371:
7372: courseacclog($what) : save message for course using &courselog(). Perform
7373: special processing for specific resource types (problems, exams, quizzes, etc).
7374:
7375: =item *
7376:
7377: goodbye() : flush course logs and log shutting down; it is called in srm.conf
7378: as a PerlChildExitHandler
7379:
7380: =back
7381:
7382: =head2 Other
7383:
7384: =over 4
7385:
7386: =item *
7387:
7388: symblist($mapname,%newhash) : update symbolic storage links
7389:
7390: =back
7391:
7392: =cut
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