1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.688 2005/12/28 19:26:19 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]);
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 (keys %newenv) {
293: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
294: &logthis("<font color=\"blue\">WARNING: ".
295: "Attempt to modify environment ".$_." to ".$newenv{$_}
296: .'</font>');
297: delete($newenv{$_});
298: } else {
299: $env{$_}=$newenv{$_};
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[$i]);
327: unless (defined($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: '.$!;
382: }
383: foreach (@oldenv) {
384: if ($_=~/^$delthis/) {
385: my ($key,undef) = split('=',$_);
386: delete($env{$key});
387: } else {
388: print $fh $_;
389: }
390: }
391: close($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: open(FH,'>'.$filepath.'/'.$file);
1362: print FH $env{'form.'.$formname};
1363: close(FH);
1364: }
1365: if ($parser eq 'parse') {
1366: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1367: $codebase);
1368: unless ($parse_result eq 'ok') {
1369: &logthis('Failed to parse '.$filepath.$file.
1370: ' for embedded media: '.$parse_result);
1371: }
1372: }
1373: # Notify homeserver to grep it
1374: #
1375: my $docuhome=&homeserver($docuname,$docudom);
1376: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1377: if ($fetchresult eq 'ok') {
1378: #
1379: # Return the URL to it
1380: return '/uploaded/'.$path.$file;
1381: } else {
1382: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1383: ': '.$fetchresult);
1384: return '/adm/notfound.html';
1385: }
1386: }
1387:
1388: sub extract_embedded_items {
1389: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1390: my @state = ();
1391: my %javafiles = (
1392: codebase => '',
1393: code => '',
1394: archive => ''
1395: );
1396: my %mediafiles = (
1397: src => '',
1398: movie => '',
1399: );
1400: my $p;
1401: if ($content) {
1402: $p = HTML::LCParser->new($content);
1403: } else {
1404: $p = HTML::LCParser->new($filepath.'/'.$file);
1405: }
1406: while (my $t=$p->get_token()) {
1407: if ($t->[0] eq 'S') {
1408: my ($tagname, $attr) = ($t->[1],$t->[2]);
1409: push (@state, $tagname);
1410: if (lc($tagname) eq 'allow') {
1411: &add_filetype($allfiles,$attr->{'src'},'src');
1412: }
1413: if (lc($tagname) eq 'img') {
1414: &add_filetype($allfiles,$attr->{'src'},'src');
1415: }
1416: if (lc($tagname) eq 'script') {
1417: if ($attr->{'archive'} =~ /\.jar$/i) {
1418: &add_filetype($allfiles,$attr->{'archive'},'archive');
1419: } else {
1420: &add_filetype($allfiles,$attr->{'src'},'src');
1421: }
1422: }
1423: if (lc($tagname) eq 'link') {
1424: if (lc($attr->{'rel'}) eq 'stylesheet') {
1425: &add_filetype($allfiles,$attr->{'href'},'href');
1426: }
1427: }
1428: if (lc($tagname) eq 'object' ||
1429: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1430: foreach my $item (keys(%javafiles)) {
1431: $javafiles{$item} = '';
1432: }
1433: }
1434: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1435: my $name = lc($attr->{'name'});
1436: foreach my $item (keys(%javafiles)) {
1437: if ($name eq $item) {
1438: $javafiles{$item} = $attr->{'value'};
1439: last;
1440: }
1441: }
1442: foreach my $item (keys(%mediafiles)) {
1443: if ($name eq $item) {
1444: &add_filetype($allfiles, $attr->{'value'}, 'value');
1445: last;
1446: }
1447: }
1448: }
1449: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1450: foreach my $item (keys(%javafiles)) {
1451: if ($attr->{$item}) {
1452: $javafiles{$item} = $attr->{$item};
1453: last;
1454: }
1455: }
1456: foreach my $item (keys(%mediafiles)) {
1457: if ($attr->{$item}) {
1458: &add_filetype($allfiles,$attr->{$item},$item);
1459: last;
1460: }
1461: }
1462: }
1463: } elsif ($t->[0] eq 'E') {
1464: my ($tagname) = ($t->[1]);
1465: if ($javafiles{'codebase'} ne '') {
1466: $javafiles{'codebase'} .= '/';
1467: }
1468: if (lc($tagname) eq 'applet' ||
1469: lc($tagname) eq 'object' ||
1470: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1471: ) {
1472: foreach my $item (keys(%javafiles)) {
1473: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1474: my $file=$javafiles{'codebase'}.$javafiles{$item};
1475: &add_filetype($allfiles,$file,$item);
1476: }
1477: }
1478: }
1479: pop @state;
1480: }
1481: }
1482: return 'ok';
1483: }
1484:
1485: sub add_filetype {
1486: my ($allfiles,$file,$type)=@_;
1487: if (exists($allfiles->{$file})) {
1488: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1489: push(@{$allfiles->{$file}}, &escape($type));
1490: }
1491: } else {
1492: @{$allfiles->{$file}} = (&escape($type));
1493: }
1494: }
1495:
1496: sub removeuploadedurl {
1497: my ($url)=@_;
1498: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1499: return &removeuserfile($uname,$udom,$fname);
1500: }
1501:
1502: sub removeuserfile {
1503: my ($docuname,$docudom,$fname)=@_;
1504: my $home=&homeserver($docuname,$docudom);
1505: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1506: }
1507:
1508: sub mkdiruserfile {
1509: my ($docuname,$docudom,$dir)=@_;
1510: my $home=&homeserver($docuname,$docudom);
1511: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1512: }
1513:
1514: sub renameuserfile {
1515: my ($docuname,$docudom,$old,$new)=@_;
1516: my $home=&homeserver($docuname,$docudom);
1517: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1518: &escape("$new"),$home);
1519: }
1520:
1521: # ------------------------------------------------------------------------- Log
1522:
1523: sub log {
1524: my ($dom,$nam,$hom,$what)=@_;
1525: return critical("log:$dom:$nam:$what",$hom);
1526: }
1527:
1528: # ------------------------------------------------------------------ Course Log
1529: #
1530: # This routine flushes several buffers of non-mission-critical nature
1531: #
1532:
1533: sub flushcourselogs {
1534: &logthis('Flushing log buffers');
1535: #
1536: # course logs
1537: # This is a log of all transactions in a course, which can be used
1538: # for data mining purposes
1539: #
1540: # It also collects the courseid database, which lists last transaction
1541: # times and course titles for all courseids
1542: #
1543: my %courseidbuffer=();
1544: foreach (keys %courselogs) {
1545: my $crsid=$_;
1546: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1547: &escape($courselogs{$crsid}),
1548: $coursehombuf{$crsid}) eq 'ok') {
1549: delete $courselogs{$crsid};
1550: } else {
1551: &logthis('Failed to flush log buffer for '.$crsid);
1552: if (length($courselogs{$crsid})>40000) {
1553: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
1554: " exceeded maximum size, deleting.</font>");
1555: delete $courselogs{$crsid};
1556: }
1557: }
1558: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1559: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1560: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1561: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1562: } else {
1563: $courseidbuffer{$coursehombuf{$crsid}}=
1564: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1565: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1566: }
1567: }
1568: #
1569: # Write course id database (reverse lookup) to homeserver of courses
1570: # Is used in pickcourse
1571: #
1572: foreach (keys %courseidbuffer) {
1573: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1574: }
1575: #
1576: # File accesses
1577: # Writes to the dynamic metadata of resources to get hit counts, etc.
1578: #
1579: foreach my $entry (keys(%accesshash)) {
1580: if ($entry =~ /___count$/) {
1581: my ($dom,$name);
1582: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1583: if (! defined($dom) || $dom eq '' ||
1584: ! defined($name) || $name eq '') {
1585: my $cid = $env{'request.course.id'};
1586: $dom = $env{'request.'.$cid.'.domain'};
1587: $name = $env{'request.'.$cid.'.num'};
1588: }
1589: my $value = $accesshash{$entry};
1590: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1591: my %temphash=($url => $value);
1592: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1593: if ($result eq 'ok') {
1594: delete $accesshash{$entry};
1595: } elsif ($result eq 'unknown_cmd') {
1596: # Target server has old code running on it.
1597: my %temphash=($entry => $value);
1598: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1599: delete $accesshash{$entry};
1600: }
1601: }
1602: } else {
1603: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1604: my %temphash=($entry => $accesshash{$entry});
1605: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1606: delete $accesshash{$entry};
1607: }
1608: }
1609: }
1610: #
1611: # Roles
1612: # Reverse lookup of user roles for course faculty/staff and co-authorship
1613: #
1614: foreach (keys %userrolehash) {
1615: my $entry=$_;
1616: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1617: split(/\:/,$entry);
1618: if (&Apache::lonnet::put('nohist_userroles',
1619: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1620: $rudom,$runame) eq 'ok') {
1621: delete $userrolehash{$entry};
1622: }
1623: }
1624: #
1625: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1626: #
1627: my %domrolebuffer = ();
1628: foreach my $entry (keys %domainrolehash) {
1629: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1630: if ($domrolebuffer{$rudom}) {
1631: $domrolebuffer{$rudom}.='&'.&escape($entry).
1632: '='.&escape($domainrolehash{$entry});
1633: } else {
1634: $domrolebuffer{$rudom}.=&escape($entry).
1635: '='.&escape($domainrolehash{$entry});
1636: }
1637: delete $domainrolehash{$entry};
1638: }
1639: foreach my $dom (keys(%domrolebuffer)) {
1640: foreach my $tryserver (keys %libserv) {
1641: if ($hostdom{$tryserver} eq $dom) {
1642: unless (&reply('domroleput:'.$dom.':'.
1643: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1644: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1645: }
1646: }
1647: }
1648: }
1649: $dumpcount++;
1650: }
1651:
1652: sub courselog {
1653: my $what=shift;
1654: $what=time.':'.$what;
1655: unless ($env{'request.course.id'}) { return ''; }
1656: $coursedombuf{$env{'request.course.id'}}=
1657: $env{'course.'.$env{'request.course.id'}.'.domain'};
1658: $coursenumbuf{$env{'request.course.id'}}=
1659: $env{'course.'.$env{'request.course.id'}.'.num'};
1660: $coursehombuf{$env{'request.course.id'}}=
1661: $env{'course.'.$env{'request.course.id'}.'.home'};
1662: $coursedescrbuf{$env{'request.course.id'}}=
1663: $env{'course.'.$env{'request.course.id'}.'.description'};
1664: $courseinstcodebuf{$env{'request.course.id'}}=
1665: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1666: $courseownerbuf{$env{'request.course.id'}}=
1667: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1668: if (defined $courselogs{$env{'request.course.id'}}) {
1669: $courselogs{$env{'request.course.id'}}.='&'.$what;
1670: } else {
1671: $courselogs{$env{'request.course.id'}}.=$what;
1672: }
1673: if (length($courselogs{$env{'request.course.id'}})>4048) {
1674: &flushcourselogs();
1675: }
1676: }
1677:
1678: sub courseacclog {
1679: my $fnsymb=shift;
1680: unless ($env{'request.course.id'}) { return ''; }
1681: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1682: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1683: $what.=':POST';
1684: # FIXME: Probably ought to escape things....
1685: foreach (keys %env) {
1686: if ($_=~/^form\.(.*)/) {
1687: $what.=':'.$1.'='.$env{$_};
1688: }
1689: }
1690: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1691: # FIXME: We should not be depending on a form parameter that someone
1692: # editing lonsearchcat.pm might change in the future.
1693: if ($env{'form.phase'} eq 'course_search') {
1694: $what.= ':POST';
1695: # FIXME: Probably ought to escape things....
1696: foreach my $element ('courseexp','crsfulltext','crsrelated',
1697: 'crsdiscuss') {
1698: $what.=':'.$element.'='.$env{'form.'.$element};
1699: }
1700: }
1701: }
1702: &courselog($what);
1703: }
1704:
1705: sub countacc {
1706: my $url=&declutter(shift);
1707: return if (! defined($url) || $url eq '');
1708: unless ($env{'request.course.id'}) { return ''; }
1709: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1710: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1711: $accesshash{$key}++;
1712: }
1713:
1714: sub linklog {
1715: my ($from,$to)=@_;
1716: $from=&declutter($from);
1717: $to=&declutter($to);
1718: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1719: $accesshash{$to.'___'.$from.'___goto'}=1;
1720: }
1721:
1722: sub userrolelog {
1723: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1724: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
1725: ($trole=~/^in/) || ($trole=~/^cc/) ||
1726: ($trole=~/^ep/) || ($trole=~/^cr/) ||
1727: ($trole=~/^ta/)) {
1728: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1729: $userrolehash
1730: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1731: =$tend.':'.$tstart;
1732: }
1733: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
1734: ($trole=~/^li/) || ($trole=~/^li/) ||
1735: ($trole=~/^au/) || ($trole=~/^dg/) ||
1736: ($trole=~/^sc/)) {
1737: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1738: $domainrolehash
1739: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1740: = $tend.':'.$tstart;
1741: }
1742: }
1743:
1744: sub get_course_adv_roles {
1745: my $cid=shift;
1746: $cid=$env{'request.course.id'} unless (defined($cid));
1747: my %coursehash=&coursedescription($cid);
1748: my %nothide=();
1749: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1750: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1751: }
1752: my %returnhash=();
1753: my %dumphash=
1754: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1755: my $now=time;
1756: foreach (keys %dumphash) {
1757: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1758: if (($tstart) && ($tstart<0)) { next; }
1759: if (($tend) && ($tend<$now)) { next; }
1760: if (($tstart) && ($now<$tstart)) { next; }
1761: my ($role,$username,$domain,$section)=split(/\:/,$_);
1762: if ($username eq '' || $domain eq '') { next; }
1763: if ((&privileged($username,$domain)) &&
1764: (!$nothide{$username.':'.$domain})) { next; }
1765: if ($role eq 'cr') { next; }
1766: my $key=&plaintext($role);
1767: if ($role =~ /^cr/) {
1768: $key=(split('/',$role))[3];
1769: }
1770: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1771: if ($returnhash{$key}) {
1772: $returnhash{$key}.=','.$username.':'.$domain;
1773: } else {
1774: $returnhash{$key}=$username.':'.$domain;
1775: }
1776: }
1777: return %returnhash;
1778: }
1779:
1780: sub get_my_roles {
1781: my ($uname,$udom)=@_;
1782: unless (defined($uname)) { $uname=$env{'user.name'}; }
1783: unless (defined($udom)) { $udom=$env{'user.domain'}; }
1784: my %dumphash=
1785: &dump('nohist_userroles',$udom,$uname);
1786: my %returnhash=();
1787: my $now=time;
1788: foreach (keys %dumphash) {
1789: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1790: if (($tstart) && ($tstart<0)) { next; }
1791: if (($tend) && ($tend<$now)) { next; }
1792: if (($tstart) && ($now<$tstart)) { next; }
1793: my ($role,$username,$domain,$section)=split(/\:/,$_);
1794: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1795: }
1796: return %returnhash;
1797: }
1798:
1799: # ----------------------------------------------------- Frontpage Announcements
1800: #
1801: #
1802:
1803: sub postannounce {
1804: my ($server,$text)=@_;
1805: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1806: unless ($text=~/\w/) { $text=''; }
1807: return &reply('setannounce:'.&escape($text),$server);
1808: }
1809:
1810: sub getannounce {
1811:
1812: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1813: my $announcement='';
1814: while (<$fh>) { $announcement .=$_; }
1815: close($fh);
1816: if ($announcement=~/\w/) {
1817: return
1818: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1819: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1820: } else {
1821: return '';
1822: }
1823: } else {
1824: return '';
1825: }
1826: }
1827:
1828: # ---------------------------------------------------------- Course ID routines
1829: # Deal with domain's nohist_courseid.db files
1830: #
1831:
1832: sub courseidput {
1833: my ($domain,$what,$coursehome)=@_;
1834: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1835: }
1836:
1837: sub courseiddump {
1838: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref)=@_;
1839: my %returnhash=();
1840: unless ($domfilter) { $domfilter=''; }
1841: foreach my $tryserver (keys %libserv) {
1842: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1843: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1844: foreach (
1845: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1846: $sincefilter.':'.&escape($descfilter).':'.
1847: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter),
1848: $tryserver))) {
1849: my ($key,$value)=split(/\=/,$_);
1850: if (($key) && ($value)) {
1851: $returnhash{&unescape($key)}=$value;
1852: }
1853: }
1854: }
1855: }
1856: }
1857: return %returnhash;
1858: }
1859:
1860: # ---------------------------------------------------------- DC e-mail
1861:
1862: sub dcmailput {
1863: my ($domain,$msgid,$message,$server)=@_;
1864: my $status = &Apache::lonnet::critical(
1865: 'dcmailput:'.$domain.':'.&Apache::lonnet::escape($msgid).'='.
1866: &Apache::lonnet::escape($message),$server);
1867: return $status;
1868: }
1869:
1870: sub dcmaildump {
1871: my ($dom,$startdate,$enddate,$senders) = @_;
1872: my %returnhash=();
1873: if (exists($domain_primary{$dom})) {
1874: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
1875: &escape($enddate).':';
1876: my @esc_senders=map { &escape($_)} @$senders;
1877: $cmd.=&escape(join('&',@esc_senders));
1878: foreach (split(/\&/,&reply($cmd,$domain_primary{$dom}))) {
1879: my ($key,$value) = split(/\=/,$_);
1880: if (($key) && ($value)) {
1881: $returnhash{&unescape($key)} = &unescape($value);
1882: }
1883: }
1884: }
1885: return %returnhash;
1886: }
1887: # ---------------------------------------------------------- Domain roles
1888:
1889: sub get_domain_roles {
1890: my ($dom,$roles,$startdate,$enddate)=@_;
1891: if (undef($startdate) || $startdate eq '') {
1892: $startdate = '.';
1893: }
1894: if (undef($enddate) || $enddate eq '') {
1895: $enddate = '.';
1896: }
1897: my $rolelist = join(':',@{$roles});
1898: my %personnel = ();
1899: foreach my $tryserver (keys(%libserv)) {
1900: if ($hostdom{$tryserver} eq $dom) {
1901: %{$personnel{$tryserver}}=();
1902: foreach (
1903: split(/\&/,&reply('domrolesdump:'.$dom.':'.
1904: &escape($startdate).':'.&escape($enddate).':'.
1905: &escape($rolelist), $tryserver))) {
1906: my($key,$value) = split(/\=/,$_);
1907: if (($key) && ($value)) {
1908: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
1909: }
1910: }
1911: }
1912: }
1913: return %personnel;
1914: }
1915:
1916: # ----------------------------------------------------------- Check out an item
1917:
1918: sub get_first_access {
1919: my ($type,$argsymb)=@_;
1920: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1921: if ($argsymb) { $symb=$argsymb; }
1922: my ($map,$id,$res)=&decode_symb($symb);
1923: if ($type eq 'map') {
1924: $res=&symbread($map);
1925: } else {
1926: $res=$symb;
1927: }
1928: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
1929: return $times{"$courseid\0$res"};
1930: }
1931:
1932: sub set_first_access {
1933: my ($type)=@_;
1934: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1935: my ($map,$id,$res)=&decode_symb($symb);
1936: if ($type eq 'map') {
1937: $res=&symbread($map);
1938: } else {
1939: $res=$symb;
1940: }
1941: my $firstaccess=&get_first_access($type,$symb);
1942: if (!$firstaccess) {
1943: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
1944: }
1945: return 'already_set';
1946: }
1947:
1948: sub checkout {
1949: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1950: my $now=time;
1951: my $lonhost=$perlvar{'lonHostID'};
1952: my $infostr=&escape(
1953: 'CHECKOUTTOKEN&'.
1954: $tuname.'&'.
1955: $tudom.'&'.
1956: $tcrsid.'&'.
1957: $symb.'&'.
1958: $now.'&'.$ENV{'REMOTE_ADDR'});
1959: my $token=&reply('tmpput:'.$infostr,$lonhost);
1960: if ($token=~/^error\:/) {
1961: &logthis("<font color=\"blue\">WARNING: ".
1962: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1963: "</font>");
1964: return '';
1965: }
1966:
1967: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1968: $token=~tr/a-z/A-Z/;
1969:
1970: my %infohash=('resource.0.outtoken' => $token,
1971: 'resource.0.checkouttime' => $now,
1972: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1973:
1974: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1975: return '';
1976: } else {
1977: &logthis("<font color=\"blue\">WARNING: ".
1978: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1979: "</font>");
1980: }
1981:
1982: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1983: &escape('Checkout '.$infostr.' - '.
1984: $token)) ne 'ok') {
1985: return '';
1986: } else {
1987: &logthis("<font color=\"blue\">WARNING: ".
1988: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1989: "</font>");
1990: }
1991: return $token;
1992: }
1993:
1994: # ------------------------------------------------------------ Check in an item
1995:
1996: sub checkin {
1997: my $token=shift;
1998: my $now=time;
1999: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2000: $lonhost=~tr/A-Z/a-z/;
2001: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
2002: $dtoken=~s/\W/\_/g;
2003: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2004: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2005:
2006: unless (($tuname) && ($tudom)) {
2007: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2008: return '';
2009: }
2010:
2011: unless (&allowed('mgr',$tcrsid)) {
2012: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2013: $env{'user.name'}.' - '.$env{'user.domain'});
2014: return '';
2015: }
2016:
2017: my %infohash=('resource.0.intoken' => $token,
2018: 'resource.0.checkintime' => $now,
2019: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2020:
2021: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2022: return '';
2023: }
2024:
2025: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2026: &escape('Checkin - '.$token)) ne 'ok') {
2027: return '';
2028: }
2029:
2030: return ($symb,$tuname,$tudom,$tcrsid);
2031: }
2032:
2033: # --------------------------------------------- Set Expire Date for Spreadsheet
2034:
2035: sub expirespread {
2036: my ($uname,$udom,$stype,$usymb)=@_;
2037: my $cid=$env{'request.course.id'};
2038: if ($cid) {
2039: my $now=time;
2040: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2041: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2042: $env{'course.'.$cid.'.num'}.
2043: ':nohist_expirationdates:'.
2044: &escape($key).'='.$now,
2045: $env{'course.'.$cid.'.home'})
2046: }
2047: return 'ok';
2048: }
2049:
2050: # ----------------------------------------------------- Devalidate Spreadsheets
2051:
2052: sub devalidate {
2053: my ($symb,$uname,$udom)=@_;
2054: my $cid=$env{'request.course.id'};
2055: if ($cid) {
2056: # delete the stored spreadsheets for
2057: # - the student level sheet of this user in course's homespace
2058: # - the assessment level sheet for this resource
2059: # for this user in user's homespace
2060: # - current conditional state info
2061: my $key=$uname.':'.$udom.':';
2062: my $status=
2063: &del('nohist_calculatedsheets',
2064: [$key.'studentcalc:'],
2065: $env{'course.'.$cid.'.domain'},
2066: $env{'course.'.$cid.'.num'})
2067: .' '.
2068: &del('nohist_calculatedsheets_'.$cid,
2069: [$key.'assesscalc:'.$symb],$udom,$uname);
2070: unless ($status eq 'ok ok') {
2071: &logthis('Could not devalidate spreadsheet '.
2072: $uname.' at '.$udom.' for '.
2073: $symb.': '.$status);
2074: }
2075: &delenv('user.state.'.$cid);
2076: }
2077: }
2078:
2079: sub get_scalar {
2080: my ($string,$end) = @_;
2081: my $value;
2082: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2083: $value = $1;
2084: } elsif ($$string =~ s/^([^&]*?)&//) {
2085: $value = $1;
2086: }
2087: return &unescape($value);
2088: }
2089:
2090: sub array2str {
2091: my (@array) = @_;
2092: my $result=&arrayref2str(\@array);
2093: $result=~s/^__ARRAY_REF__//;
2094: $result=~s/__END_ARRAY_REF__$//;
2095: return $result;
2096: }
2097:
2098: sub arrayref2str {
2099: my ($arrayref) = @_;
2100: my $result='__ARRAY_REF__';
2101: foreach my $elem (@$arrayref) {
2102: if(ref($elem) eq 'ARRAY') {
2103: $result.=&arrayref2str($elem).'&';
2104: } elsif(ref($elem) eq 'HASH') {
2105: $result.=&hashref2str($elem).'&';
2106: } elsif(ref($elem)) {
2107: #print("Got a ref of ".(ref($elem))." skipping.");
2108: } else {
2109: $result.=&escape($elem).'&';
2110: }
2111: }
2112: $result=~s/\&$//;
2113: $result .= '__END_ARRAY_REF__';
2114: return $result;
2115: }
2116:
2117: sub hash2str {
2118: my (%hash) = @_;
2119: my $result=&hashref2str(\%hash);
2120: $result=~s/^__HASH_REF__//;
2121: $result=~s/__END_HASH_REF__$//;
2122: return $result;
2123: }
2124:
2125: sub hashref2str {
2126: my ($hashref)=@_;
2127: my $result='__HASH_REF__';
2128: foreach (sort(keys(%$hashref))) {
2129: if (ref($_) eq 'ARRAY') {
2130: $result.=&arrayref2str($_).'=';
2131: } elsif (ref($_) eq 'HASH') {
2132: $result.=&hashref2str($_).'=';
2133: } elsif (ref($_)) {
2134: $result.='=';
2135: #print("Got a ref of ".(ref($_))." skipping.");
2136: } else {
2137: if ($_) {$result.=&escape($_).'=';} else { last; }
2138: }
2139:
2140: if(ref($hashref->{$_}) eq 'ARRAY') {
2141: $result.=&arrayref2str($hashref->{$_}).'&';
2142: } elsif(ref($hashref->{$_}) eq 'HASH') {
2143: $result.=&hashref2str($hashref->{$_}).'&';
2144: } elsif(ref($hashref->{$_})) {
2145: $result.='&';
2146: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
2147: } else {
2148: $result.=&escape($hashref->{$_}).'&';
2149: }
2150: }
2151: $result=~s/\&$//;
2152: $result .= '__END_HASH_REF__';
2153: return $result;
2154: }
2155:
2156: sub str2hash {
2157: my ($string)=@_;
2158: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2159: return %$hash;
2160: }
2161:
2162: sub str2hashref {
2163: my ($string) = @_;
2164:
2165: my %hash;
2166:
2167: if($string !~ /^__HASH_REF__/) {
2168: if (! ($string eq '' || !defined($string))) {
2169: $hash{'error'}='Not hash reference';
2170: }
2171: return (\%hash, $string);
2172: }
2173:
2174: $string =~ s/^__HASH_REF__//;
2175:
2176: while($string !~ /^__END_HASH_REF__/) {
2177: #key
2178: my $key='';
2179: if($string =~ /^__HASH_REF__/) {
2180: ($key, $string)=&str2hashref($string);
2181: if(defined($key->{'error'})) {
2182: $hash{'error'}='Bad data';
2183: return (\%hash, $string);
2184: }
2185: } elsif($string =~ /^__ARRAY_REF__/) {
2186: ($key, $string)=&str2arrayref($string);
2187: if($key->[0] eq 'Array reference error') {
2188: $hash{'error'}='Bad data';
2189: return (\%hash, $string);
2190: }
2191: } else {
2192: $string =~ s/^(.*?)=//;
2193: $key=&unescape($1);
2194: }
2195: $string =~ s/^=//;
2196:
2197: #value
2198: my $value='';
2199: if($string =~ /^__HASH_REF__/) {
2200: ($value, $string)=&str2hashref($string);
2201: if(defined($value->{'error'})) {
2202: $hash{'error'}='Bad data';
2203: return (\%hash, $string);
2204: }
2205: } elsif($string =~ /^__ARRAY_REF__/) {
2206: ($value, $string)=&str2arrayref($string);
2207: if($value->[0] eq 'Array reference error') {
2208: $hash{'error'}='Bad data';
2209: return (\%hash, $string);
2210: }
2211: } else {
2212: $value=&get_scalar(\$string,'__END_HASH_REF__');
2213: }
2214: $string =~ s/^&//;
2215:
2216: $hash{$key}=$value;
2217: }
2218:
2219: $string =~ s/^__END_HASH_REF__//;
2220:
2221: return (\%hash, $string);
2222: }
2223:
2224: sub str2array {
2225: my ($string)=@_;
2226: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2227: return @$array;
2228: }
2229:
2230: sub str2arrayref {
2231: my ($string) = @_;
2232: my @array;
2233:
2234: if($string !~ /^__ARRAY_REF__/) {
2235: if (! ($string eq '' || !defined($string))) {
2236: $array[0]='Array reference error';
2237: }
2238: return (\@array, $string);
2239: }
2240:
2241: $string =~ s/^__ARRAY_REF__//;
2242:
2243: while($string !~ /^__END_ARRAY_REF__/) {
2244: my $value='';
2245: if($string =~ /^__HASH_REF__/) {
2246: ($value, $string)=&str2hashref($string);
2247: if(defined($value->{'error'})) {
2248: $array[0] ='Array reference error';
2249: return (\@array, $string);
2250: }
2251: } elsif($string =~ /^__ARRAY_REF__/) {
2252: ($value, $string)=&str2arrayref($string);
2253: if($value->[0] eq 'Array reference error') {
2254: $array[0] ='Array reference error';
2255: return (\@array, $string);
2256: }
2257: } else {
2258: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2259: }
2260: $string =~ s/^&//;
2261:
2262: push(@array, $value);
2263: }
2264:
2265: $string =~ s/^__END_ARRAY_REF__//;
2266:
2267: return (\@array, $string);
2268: }
2269:
2270: # -------------------------------------------------------------------Temp Store
2271:
2272: sub tmpreset {
2273: my ($symb,$namespace,$domain,$stuname) = @_;
2274: if (!$symb) {
2275: $symb=&symbread();
2276: if (!$symb) { $symb= $env{'request.url'}; }
2277: }
2278: $symb=escape($symb);
2279:
2280: if (!$namespace) { $namespace=$env{'request.state'}; }
2281: $namespace=~s/\//\_/g;
2282: $namespace=~s/\W//g;
2283:
2284: if (!$domain) { $domain=$env{'user.domain'}; }
2285: if (!$stuname) { $stuname=$env{'user.name'}; }
2286: if ($domain eq 'public' && $stuname eq 'public') {
2287: $stuname=$ENV{'REMOTE_ADDR'};
2288: }
2289: my $path=$perlvar{'lonDaemons'}.'/tmp';
2290: my %hash;
2291: if (tie(%hash,'GDBM_File',
2292: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2293: &GDBM_WRCREAT(),0640)) {
2294: foreach my $key (keys %hash) {
2295: if ($key=~ /:$symb/) {
2296: delete($hash{$key});
2297: }
2298: }
2299: }
2300: }
2301:
2302: sub tmpstore {
2303: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2304:
2305: if (!$symb) {
2306: $symb=&symbread();
2307: if (!$symb) { $symb= $env{'request.url'}; }
2308: }
2309: $symb=escape($symb);
2310:
2311: if (!$namespace) {
2312: # I don't think we would ever want to store this for a course.
2313: # it seems this will only be used if we don't have a course.
2314: #$namespace=$env{'request.course.id'};
2315: #if (!$namespace) {
2316: $namespace=$env{'request.state'};
2317: #}
2318: }
2319: $namespace=~s/\//\_/g;
2320: $namespace=~s/\W//g;
2321: if (!$domain) { $domain=$env{'user.domain'}; }
2322: if (!$stuname) { $stuname=$env{'user.name'}; }
2323: if ($domain eq 'public' && $stuname eq 'public') {
2324: $stuname=$ENV{'REMOTE_ADDR'};
2325: }
2326: my $now=time;
2327: my %hash;
2328: my $path=$perlvar{'lonDaemons'}.'/tmp';
2329: if (tie(%hash,'GDBM_File',
2330: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2331: &GDBM_WRCREAT(),0640)) {
2332: $hash{"version:$symb"}++;
2333: my $version=$hash{"version:$symb"};
2334: my $allkeys='';
2335: foreach my $key (keys(%$storehash)) {
2336: $allkeys.=$key.':';
2337: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2338: }
2339: $hash{"$version:$symb:timestamp"}=$now;
2340: $allkeys.='timestamp';
2341: $hash{"$version:keys:$symb"}=$allkeys;
2342: if (untie(%hash)) {
2343: return 'ok';
2344: } else {
2345: return "error:$!";
2346: }
2347: } else {
2348: return "error:$!";
2349: }
2350: }
2351:
2352: # -----------------------------------------------------------------Temp Restore
2353:
2354: sub tmprestore {
2355: my ($symb,$namespace,$domain,$stuname) = @_;
2356:
2357: if (!$symb) {
2358: $symb=&symbread();
2359: if (!$symb) { $symb= $env{'request.url'}; }
2360: }
2361: $symb=escape($symb);
2362:
2363: if (!$namespace) { $namespace=$env{'request.state'}; }
2364:
2365: if (!$domain) { $domain=$env{'user.domain'}; }
2366: if (!$stuname) { $stuname=$env{'user.name'}; }
2367: if ($domain eq 'public' && $stuname eq 'public') {
2368: $stuname=$ENV{'REMOTE_ADDR'};
2369: }
2370: my %returnhash;
2371: $namespace=~s/\//\_/g;
2372: $namespace=~s/\W//g;
2373: my %hash;
2374: my $path=$perlvar{'lonDaemons'}.'/tmp';
2375: if (tie(%hash,'GDBM_File',
2376: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2377: &GDBM_READER(),0640)) {
2378: my $version=$hash{"version:$symb"};
2379: $returnhash{'version'}=$version;
2380: my $scope;
2381: for ($scope=1;$scope<=$version;$scope++) {
2382: my $vkeys=$hash{"$scope:keys:$symb"};
2383: my @keys=split(/:/,$vkeys);
2384: my $key;
2385: $returnhash{"$scope:keys"}=$vkeys;
2386: foreach $key (@keys) {
2387: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2388: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2389: }
2390: }
2391: if (!(untie(%hash))) {
2392: return "error:$!";
2393: }
2394: } else {
2395: return "error:$!";
2396: }
2397: return %returnhash;
2398: }
2399:
2400: # ----------------------------------------------------------------------- Store
2401:
2402: sub store {
2403: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2404: my $home='';
2405:
2406: if ($stuname) { $home=&homeserver($stuname,$domain); }
2407:
2408: $symb=&symbclean($symb);
2409: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2410:
2411: if (!$domain) { $domain=$env{'user.domain'}; }
2412: if (!$stuname) { $stuname=$env{'user.name'}; }
2413:
2414: &devalidate($symb,$stuname,$domain);
2415:
2416: $symb=escape($symb);
2417: if (!$namespace) {
2418: unless ($namespace=$env{'request.course.id'}) {
2419: return '';
2420: }
2421: }
2422: if (!$home) { $home=$env{'user.home'}; }
2423:
2424: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2425: $$storehash{'host'}=$perlvar{'lonHostID'};
2426:
2427: my $namevalue='';
2428: foreach (keys %$storehash) {
2429: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2430: }
2431: $namevalue=~s/\&$//;
2432: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2433: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2434: }
2435:
2436: # -------------------------------------------------------------- Critical Store
2437:
2438: sub cstore {
2439: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2440: my $home='';
2441:
2442: if ($stuname) { $home=&homeserver($stuname,$domain); }
2443:
2444: $symb=&symbclean($symb);
2445: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2446:
2447: if (!$domain) { $domain=$env{'user.domain'}; }
2448: if (!$stuname) { $stuname=$env{'user.name'}; }
2449:
2450: &devalidate($symb,$stuname,$domain);
2451:
2452: $symb=escape($symb);
2453: if (!$namespace) {
2454: unless ($namespace=$env{'request.course.id'}) {
2455: return '';
2456: }
2457: }
2458: if (!$home) { $home=$env{'user.home'}; }
2459:
2460: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2461: $$storehash{'host'}=$perlvar{'lonHostID'};
2462:
2463: my $namevalue='';
2464: foreach (keys %$storehash) {
2465: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2466: }
2467: $namevalue=~s/\&$//;
2468: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2469: return critical
2470: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2471: }
2472:
2473: # --------------------------------------------------------------------- Restore
2474:
2475: sub restore {
2476: my ($symb,$namespace,$domain,$stuname) = @_;
2477: my $home='';
2478:
2479: if ($stuname) { $home=&homeserver($stuname,$domain); }
2480:
2481: if (!$symb) {
2482: unless ($symb=escape(&symbread())) { return ''; }
2483: } else {
2484: $symb=&escape(&symbclean($symb));
2485: }
2486: if (!$namespace) {
2487: unless ($namespace=$env{'request.course.id'}) {
2488: return '';
2489: }
2490: }
2491: if (!$domain) { $domain=$env{'user.domain'}; }
2492: if (!$stuname) { $stuname=$env{'user.name'}; }
2493: if (!$home) { $home=$env{'user.home'}; }
2494: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2495:
2496: my %returnhash=();
2497: foreach (split(/\&/,$answer)) {
2498: my ($name,$value)=split(/\=/,$_);
2499: $returnhash{&unescape($name)}=&thaw_unescape($value);
2500: }
2501: my $version;
2502: for ($version=1;$version<=$returnhash{'version'};$version++) {
2503: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2504: $returnhash{$_}=$returnhash{$version.':'.$_};
2505: }
2506: }
2507: return %returnhash;
2508: }
2509:
2510: # ---------------------------------------------------------- Course Description
2511:
2512: sub coursedescription {
2513: my $courseid=shift;
2514: $courseid=~s/^\///;
2515: $courseid=~s/\_/\//g;
2516: my ($cdomain,$cnum)=split(/\//,$courseid);
2517: my $chome=&homeserver($cnum,$cdomain);
2518: my $normalid=$cdomain.'_'.$cnum;
2519: # need to always cache even if we get errors otherwise we keep
2520: # trying and trying and trying to get the course description.
2521: my %envhash=();
2522: my %returnhash=();
2523: $envhash{'course.'.$normalid.'.last_cache'}=time;
2524: if ($chome ne 'no_host') {
2525: %returnhash=&dump('environment',$cdomain,$cnum);
2526: if (!exists($returnhash{'con_lost'})) {
2527: $returnhash{'home'}= $chome;
2528: $returnhash{'domain'} = $cdomain;
2529: $returnhash{'num'} = $cnum;
2530: while (my ($name,$value) = each %returnhash) {
2531: $envhash{'course.'.$normalid.'.'.$name}=$value;
2532: }
2533: $returnhash{'url'}=&clutter($returnhash{'url'});
2534: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2535: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2536: $envhash{'course.'.$normalid.'.home'}=$chome;
2537: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2538: $envhash{'course.'.$normalid.'.num'}=$cnum;
2539: }
2540: }
2541: &appenv(%envhash);
2542: return %returnhash;
2543: }
2544:
2545: # -------------------------------------------------See if a user is privileged
2546:
2547: sub privileged {
2548: my ($username,$domain)=@_;
2549: my $rolesdump=&reply("dump:$domain:$username:roles",
2550: &homeserver($username,$domain));
2551: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2552: my $now=time;
2553: if ($rolesdump ne '') {
2554: foreach (split(/&/,$rolesdump)) {
2555: if ($_!~/^rolesdef_/) {
2556: my ($area,$role)=split(/=/,$_);
2557: $area=~s/\_\w\w$//;
2558: my ($trole,$tend,$tstart)=split(/_/,$role);
2559: if (($trole eq 'dc') || ($trole eq 'su')) {
2560: my $active=1;
2561: if ($tend) {
2562: if ($tend<$now) { $active=0; }
2563: }
2564: if ($tstart) {
2565: if ($tstart>$now) { $active=0; }
2566: }
2567: if ($active) { return 1; }
2568: }
2569: }
2570: }
2571: }
2572: return 0;
2573: }
2574:
2575: # -------------------------------------------------------- Get user privileges
2576:
2577: sub rolesinit {
2578: my ($domain,$username,$authhost)=@_;
2579: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2580: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2581: my %allroles=();
2582: my %allgroups=();
2583: my $now=time;
2584: my $userroles="user.login.time=$now\n";
2585: my $group_privs;
2586:
2587: if ($rolesdump ne '') {
2588: foreach (split(/&/,$rolesdump)) {
2589: if ($_!~/^rolesdef_/) {
2590: my ($area,$role)=split(/=/,$_);
2591: $area=~s/\_\w\w$//;
2592: my ($trole,$tend,$tstart,$group_privs);
2593: if ($role=~/^cr/) {
2594: if ($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|) {
2595: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2596: ($tend,$tstart)=split('_',$trest);
2597: } else {
2598: $trole=$role;
2599: }
2600: } elsif ($role =~ m|^gr/|) {
2601: ($trole,$tend,$tstart) = split(/_/,$role);
2602: ($trole,$group_privs) = split(/\//,$trole);
2603: $group_privs = &unescape($group_privs);
2604: } else {
2605: ($trole,$tend,$tstart)=split(/_/,$role);
2606: }
2607: $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username);
2608: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2609: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2610: if (($area ne '') && ($trole ne '')) {
2611: my $spec=$trole.'.'.$area;
2612: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2613: if ($trole =~ /^cr\//) {
2614: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2615: } elsif ($trole eq 'gr') {
2616: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
2617: } else {
2618: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2619: }
2620: }
2621: }
2622: }
2623: my ($author,$adv) = &set_userprivs(\$userroles,\%allroles,\%allgroups);
2624: $userroles.='user.adv='.$adv."\n".
2625: 'user.author='.$author."\n";
2626: $env{'user.adv'}=$adv;
2627: }
2628: return $userroles;
2629: }
2630:
2631: sub set_arearole {
2632: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2633: # log the associated role with the area
2634: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2635: return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
2636: }
2637:
2638: sub custom_roleprivs {
2639: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2640: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2641: my $homsvr=homeserver($rauthor,$rdomain);
2642: if ($hostname{$homsvr} ne '') {
2643: my ($rdummy,$roledef)=
2644: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2645: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2646: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2647: if (defined($syspriv)) {
2648: $$allroles{'cm./'}.=':'.$syspriv;
2649: $$allroles{$spec.'./'}.=':'.$syspriv;
2650: }
2651: if ($tdomain ne '') {
2652: if (defined($dompriv)) {
2653: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2654: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2655: }
2656: if (($trest ne '') && (defined($coursepriv))) {
2657: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2658: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2659: }
2660: }
2661: }
2662: }
2663: }
2664:
2665: sub group_roleprivs {
2666: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
2667: my $access = 1;
2668: my $now = time;
2669: if (($tend!=0) && ($tend<$now)) { $access = 0; }
2670: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
2671: if ($access) {
2672: my ($course,$group) = ($area =~ m|(/\w+/\w+)/([^/]+)$|);
2673: $$allgroups{$course}{$group} .=':'.$group_privs;
2674: }
2675: }
2676:
2677: sub standard_roleprivs {
2678: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2679: if (defined($pr{$trole.':s'})) {
2680: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2681: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2682: }
2683: if ($tdomain ne '') {
2684: if (defined($pr{$trole.':d'})) {
2685: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2686: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2687: }
2688: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2689: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2690: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2691: }
2692: }
2693: }
2694:
2695: sub set_userprivs {
2696: my ($userroles,$allroles,$allgroups) = @_;
2697: my $author=0;
2698: my $adv=0;
2699: my %grouproles = ();
2700: if (keys(%{$allgroups}) > 0) {
2701: foreach my $role (keys %{$allroles}) {
2702: my ($trole,$area,$sec,$extendedarea);
2703: if ($role =~ m|^(\w+)\.(/\w+/\w+)(/?\w*)|) {
2704: $trole = $1;
2705: $area = $2;
2706: $sec = $3;
2707: $extendedarea = $area.$sec;
2708: if (exists($$allgroups{$area})) {
2709: foreach my $group (keys(%{$$allgroups{$area}})) {
2710: my $spec = $trole.'.'.$extendedarea;
2711: $grouproles{$spec.'.'.$area.'/'.$group} =
2712: $$allgroups{$area}{$group};
2713: }
2714: }
2715: }
2716: }
2717: }
2718: foreach (keys(%grouproles)) {
2719: $$allroles{$_} = $grouproles{$_};
2720: }
2721: foreach (keys %{$allroles}) {
2722: my %thesepriv=();
2723: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2724: foreach (split(/:/,$$allroles{$_})) {
2725: if ($_ ne '') {
2726: my ($privilege,$restrictions)=split(/&/,$_);
2727: if ($restrictions eq '') {
2728: $thesepriv{$privilege}='F';
2729: } elsif ($thesepriv{$privilege} ne 'F') {
2730: $thesepriv{$privilege}.=$restrictions;
2731: }
2732: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2733: }
2734: }
2735: my $thesestr='';
2736: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2737: $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
2738: }
2739: return ($author,$adv);
2740: }
2741:
2742: # --------------------------------------------------------------- get interface
2743:
2744: sub get {
2745: my ($namespace,$storearr,$udomain,$uname)=@_;
2746: my $items='';
2747: foreach (@$storearr) {
2748: $items.=escape($_).'&';
2749: }
2750: $items=~s/\&$//;
2751: if (!$udomain) { $udomain=$env{'user.domain'}; }
2752: if (!$uname) { $uname=$env{'user.name'}; }
2753: my $uhome=&homeserver($uname,$udomain);
2754:
2755: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2756: my @pairs=split(/\&/,$rep);
2757: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2758: return @pairs;
2759: }
2760: my %returnhash=();
2761: my $i=0;
2762: foreach (@$storearr) {
2763: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2764: $i++;
2765: }
2766: return %returnhash;
2767: }
2768:
2769: # --------------------------------------------------------------- del interface
2770:
2771: sub del {
2772: my ($namespace,$storearr,$udomain,$uname)=@_;
2773: my $items='';
2774: foreach (@$storearr) {
2775: $items.=escape($_).'&';
2776: }
2777: $items=~s/\&$//;
2778: if (!$udomain) { $udomain=$env{'user.domain'}; }
2779: if (!$uname) { $uname=$env{'user.name'}; }
2780: my $uhome=&homeserver($uname,$udomain);
2781:
2782: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2783: }
2784:
2785: # -------------------------------------------------------------- dump interface
2786:
2787: sub dump {
2788: my ($namespace,$udomain,$uname,$regexp)=@_;
2789: if (!$udomain) { $udomain=$env{'user.domain'}; }
2790: if (!$uname) { $uname=$env{'user.name'}; }
2791: my $uhome=&homeserver($uname,$udomain);
2792: if ($regexp) {
2793: $regexp=&escape($regexp);
2794: } else {
2795: $regexp='.';
2796: }
2797: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2798: my @pairs=split(/\&/,$rep);
2799: my %returnhash=();
2800: foreach (@pairs) {
2801: my ($key,$value)=split(/=/,$_);
2802: $returnhash{unescape($key)}=&thaw_unescape($value);
2803: }
2804: return %returnhash;
2805: }
2806:
2807: # -------------------------------------------------------------- keys interface
2808:
2809: sub getkeys {
2810: my ($namespace,$udomain,$uname)=@_;
2811: if (!$udomain) { $udomain=$env{'user.domain'}; }
2812: if (!$uname) { $uname=$env{'user.name'}; }
2813: my $uhome=&homeserver($uname,$udomain);
2814: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2815: my @keyarray=();
2816: foreach (split(/\&/,$rep)) {
2817: push (@keyarray,&unescape($_));
2818: }
2819: return @keyarray;
2820: }
2821:
2822: # --------------------------------------------------------------- currentdump
2823: sub currentdump {
2824: my ($courseid,$sdom,$sname)=@_;
2825: $courseid = $env{'request.course.id'} if (! defined($courseid));
2826: $sdom = $env{'user.domain'} if (! defined($sdom));
2827: $sname = $env{'user.name'} if (! defined($sname));
2828: my $uhome = &homeserver($sname,$sdom);
2829: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2830: return if ($rep =~ /^(error:|no_such_host)/);
2831: #
2832: my %returnhash=();
2833: #
2834: if ($rep eq "unknown_cmd") {
2835: # an old lond will not know currentdump
2836: # Do a dump and make it look like a currentdump
2837: my @tmp = &dump($courseid,$sdom,$sname,'.');
2838: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2839: my %hash = @tmp;
2840: @tmp=();
2841: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2842: } else {
2843: my @pairs=split(/\&/,$rep);
2844: foreach (@pairs) {
2845: my ($key,$value)=split(/=/,$_);
2846: my ($symb,$param) = split(/:/,$key);
2847: $returnhash{&unescape($symb)}->{&unescape($param)} =
2848: &thaw_unescape($value);
2849: }
2850: }
2851: return %returnhash;
2852: }
2853:
2854: sub convert_dump_to_currentdump{
2855: my %hash = %{shift()};
2856: my %returnhash;
2857: # Code ripped from lond, essentially. The only difference
2858: # here is the unescaping done by lonnet::dump(). Conceivably
2859: # we might run in to problems with parameter names =~ /^v\./
2860: while (my ($key,$value) = each(%hash)) {
2861: my ($v,$symb,$param) = split(/:/,$key);
2862: next if ($v eq 'version' || $symb eq 'keys');
2863: next if (exists($returnhash{$symb}) &&
2864: exists($returnhash{$symb}->{$param}) &&
2865: $returnhash{$symb}->{'v.'.$param} > $v);
2866: $returnhash{$symb}->{$param}=$value;
2867: $returnhash{$symb}->{'v.'.$param}=$v;
2868: }
2869: #
2870: # Remove all of the keys in the hashes which keep track of
2871: # the version of the parameter.
2872: while (my ($symb,$param_hash) = each(%returnhash)) {
2873: # use a foreach because we are going to delete from the hash.
2874: foreach my $key (keys(%$param_hash)) {
2875: delete($param_hash->{$key}) if ($key =~ /^v\./);
2876: }
2877: }
2878: return \%returnhash;
2879: }
2880:
2881: # ------------------------------------------------------ critical inc interface
2882:
2883: sub cinc {
2884: return &inc(@_,'critical');
2885: }
2886:
2887: # --------------------------------------------------------------- inc interface
2888:
2889: sub inc {
2890: my ($namespace,$store,$udomain,$uname,$critical) = @_;
2891: if (!$udomain) { $udomain=$env{'user.domain'}; }
2892: if (!$uname) { $uname=$env{'user.name'}; }
2893: my $uhome=&homeserver($uname,$udomain);
2894: my $items='';
2895: if (! ref($store)) {
2896: # got a single value, so use that instead
2897: $items = &escape($store).'=&';
2898: } elsif (ref($store) eq 'SCALAR') {
2899: $items = &escape($$store).'=&';
2900: } elsif (ref($store) eq 'ARRAY') {
2901: $items = join('=&',map {&escape($_);} @{$store});
2902: } elsif (ref($store) eq 'HASH') {
2903: while (my($key,$value) = each(%{$store})) {
2904: $items.= &escape($key).'='.&escape($value).'&';
2905: }
2906: }
2907: $items=~s/\&$//;
2908: if ($critical) {
2909: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
2910: } else {
2911: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2912: }
2913: }
2914:
2915: # --------------------------------------------------------------- put interface
2916:
2917: sub put {
2918: my ($namespace,$storehash,$udomain,$uname)=@_;
2919: if (!$udomain) { $udomain=$env{'user.domain'}; }
2920: if (!$uname) { $uname=$env{'user.name'}; }
2921: my $uhome=&homeserver($uname,$udomain);
2922: my $items='';
2923: foreach (keys %$storehash) {
2924: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2925: }
2926: $items=~s/\&$//;
2927: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2928: }
2929:
2930: # ------------------------------------------------------------ newput interface
2931:
2932: sub newput {
2933: my ($namespace,$storehash,$udomain,$uname)=@_;
2934: if (!$udomain) { $udomain=$env{'user.domain'}; }
2935: if (!$uname) { $uname=$env{'user.name'}; }
2936: my $uhome=&homeserver($uname,$udomain);
2937: my $items='';
2938: foreach my $key (keys(%$storehash)) {
2939: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
2940: }
2941: $items=~s/\&$//;
2942: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
2943: }
2944:
2945: # --------------------------------------------------------- putstore interface
2946:
2947: sub putstore {
2948: my ($namespace,$storehash,$udomain,$uname)=@_;
2949: if (!$udomain) { $udomain=$env{'user.domain'}; }
2950: if (!$uname) { $uname=$env{'user.name'}; }
2951: my $uhome=&homeserver($uname,$udomain);
2952: my $items='';
2953: my %allitems = ();
2954: foreach (keys %$storehash) {
2955: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
2956: my $key = $1.':keys:'.$2;
2957: $allitems{$key} .= $3.':';
2958: }
2959: $items.=$_.'='.&freeze_escape($$storehash{$_}).'&';
2960: }
2961: foreach (keys %allitems) {
2962: $allitems{$_} =~ s/\:$//;
2963: $items.= $_.'='.$allitems{$_}.'&';
2964: }
2965: $items=~s/\&$//;
2966: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2967: }
2968:
2969: # ------------------------------------------------------ critical put interface
2970:
2971: sub cput {
2972: my ($namespace,$storehash,$udomain,$uname)=@_;
2973: if (!$udomain) { $udomain=$env{'user.domain'}; }
2974: if (!$uname) { $uname=$env{'user.name'}; }
2975: my $uhome=&homeserver($uname,$udomain);
2976: my $items='';
2977: foreach (keys %$storehash) {
2978: $items.=escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2979: }
2980: $items=~s/\&$//;
2981: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2982: }
2983:
2984: # -------------------------------------------------------------- eget interface
2985:
2986: sub eget {
2987: my ($namespace,$storearr,$udomain,$uname)=@_;
2988: my $items='';
2989: foreach (@$storearr) {
2990: $items.=escape($_).'&';
2991: }
2992: $items=~s/\&$//;
2993: if (!$udomain) { $udomain=$env{'user.domain'}; }
2994: if (!$uname) { $uname=$env{'user.name'}; }
2995: my $uhome=&homeserver($uname,$udomain);
2996: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2997: my @pairs=split(/\&/,$rep);
2998: my %returnhash=();
2999: my $i=0;
3000: foreach (@$storearr) {
3001: $returnhash{$_}=&thaw_unescape($pairs[$i]);
3002: $i++;
3003: }
3004: return %returnhash;
3005: }
3006:
3007: # ------------------------------------------------------------ tmpput interface
3008: sub tmpput {
3009: my ($storehash,$server)=@_;
3010: my $items='';
3011: foreach (keys(%$storehash)) {
3012: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3013: }
3014: $items=~s/\&$//;
3015: return &reply("tmpput:$items",$server);
3016: }
3017:
3018: # ------------------------------------------------------------ tmpget interface
3019: sub tmpget {
3020: my ($token,$server)=@_;
3021: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3022: my $rep=&reply("tmpget:$token",$server);
3023: my %returnhash;
3024: foreach my $item (split(/\&/,$rep)) {
3025: my ($key,$value)=split(/=/,$item);
3026: $returnhash{&unescape($key)}=&thaw_unescape($value);
3027: }
3028: return %returnhash;
3029: }
3030:
3031: # ------------------------------------------------------------ tmpget interface
3032: sub tmpdel {
3033: my ($token,$server)=@_;
3034: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3035: return &reply("tmpdel:$token",$server);
3036: }
3037:
3038: # ---------------------------------------------- Custom access rule evaluation
3039:
3040: sub customaccess {
3041: my ($priv,$uri)=@_;
3042: my ($urole,$urealm)=split(/\./,$env{'request.role'});
3043: $urealm=~s/^\W//;
3044: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
3045: my $access=0;
3046: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
3047: my ($effect,$realm,$role)=split(/\:/,$_);
3048: if ($role) {
3049: if ($role ne $urole) { next; }
3050: }
3051: foreach (split(/\s*\,\s*/,$realm)) {
3052: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
3053: if ($tdom) {
3054: if ($tdom ne $udom) { next; }
3055: }
3056: if ($tcrs) {
3057: if ($tcrs ne $ucrs) { next; }
3058: }
3059: if ($tsec) {
3060: if ($tsec ne $usec) { next; }
3061: }
3062: $access=($effect eq 'allow');
3063: last;
3064: }
3065: if ($realm eq '' && $role eq '') {
3066: $access=($effect eq 'allow');
3067: }
3068: }
3069: return $access;
3070: }
3071:
3072: # ------------------------------------------------- Check for a user privilege
3073:
3074: sub allowed {
3075: my ($priv,$uri,$symb)=@_;
3076: $uri=&deversion($uri);
3077: my $orguri=$uri;
3078: $uri=&declutter($uri);
3079:
3080: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3081: # Free bre access to adm and meta resources
3082: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
3083: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
3084: return 'F';
3085: }
3086:
3087: # Free bre access to user's own portfolio contents
3088: my ($space,$domain,$name,$dir)=split('/',$uri);
3089: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3090: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
3091: return 'F';
3092: }
3093:
3094: # Free bre to public access
3095:
3096: if ($priv eq 'bre') {
3097: my $copyright=&metadata($uri,'copyright');
3098: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3099: return 'F';
3100: }
3101: if ($copyright eq 'priv') {
3102: $uri=~/([^\/]+)\/([^\/]+)\//;
3103: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3104: return '';
3105: }
3106: }
3107: if ($copyright eq 'domain') {
3108: $uri=~/([^\/]+)\/([^\/]+)\//;
3109: unless (($env{'user.domain'} eq $1) ||
3110: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3111: return '';
3112: }
3113: }
3114: if ($env{'request.role'}=~ /li\.\//) {
3115: # Library role, so allow browsing of resources in this domain.
3116: return 'F';
3117: }
3118: if ($copyright eq 'custom') {
3119: unless (&customaccess($priv,$uri)) { return ''; }
3120: }
3121: }
3122: # Domain coordinator is trying to create a course
3123: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3124: # uri is the requested domain in this case.
3125: # comparison to 'request.role.domain' shows if the user has selected
3126: # a role of dc for the domain in question.
3127: return 'F' if ($uri eq $env{'request.role.domain'});
3128: }
3129:
3130: my $thisallowed='';
3131: my $statecond=0;
3132: my $courseprivid='';
3133:
3134: # Course
3135:
3136: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3137: $thisallowed.=$1;
3138: }
3139:
3140: # Domain
3141:
3142: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3143: =~/\Q$priv\E\&([^\:]*)/) {
3144: $thisallowed.=$1;
3145: }
3146:
3147: # Course: uri itself is a course
3148: my $courseuri=$uri;
3149: $courseuri=~s/\_(\d)/\/$1/;
3150: $courseuri=~s/^([^\/])/\/$1/;
3151:
3152: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3153: =~/\Q$priv\E\&([^\:]*)/) {
3154: $thisallowed.=$1;
3155: }
3156:
3157: # Group: uri itself is a group
3158: my $groupuri=$uri;
3159: $groupuri=~s/^([^\/])/\/$1/;
3160: if ($env{'user.priv.'.$env{'request.role'}.'.'.$groupuri}
3161: =~/\Q$priv\E\&([^\:]*)/) {
3162: $thisallowed.=$1;
3163: }
3164:
3165: # URI is an uploaded document for this course, default permissions don't matter
3166: # not allowing 'edit' access (editupload) to uploaded course docs
3167: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3168: $thisallowed='';
3169: my ($match)=&is_on_map($uri);
3170: if ($match) {
3171: if ($env{'user.priv.'.$env{'request.role'}.'./'}
3172: =~/\Q$priv\E\&([^\:]*)/) {
3173: $thisallowed.=$1;
3174: }
3175: } else {
3176: my $refuri=$env{'httpref.'.$orguri};
3177: if ($refuri) {
3178: if ($refuri =~ m|^/adm/|) {
3179: $thisallowed='F';
3180: } else {
3181: $refuri=&declutter($refuri);
3182: my ($match) = &is_on_map($refuri);
3183: if ($match) {
3184: $thisallowed='F';
3185: }
3186: }
3187: }
3188: }
3189: }
3190:
3191: # Full access at system, domain or course-wide level? Exit.
3192:
3193: if ($thisallowed=~/F/) {
3194: return 'F';
3195: }
3196:
3197: # If this is generating or modifying users, exit with special codes
3198:
3199: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3200: if (($priv eq 'cca') || ($priv eq 'caa')) {
3201: my ($audom,$auname)=split('/',$uri);
3202: # no author name given, so this just checks on the general right to make a co-author in this domain
3203: unless ($auname) { return $thisallowed; }
3204: # an author name is given, so we are about to actually make a co-author for a certain account
3205: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3206: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3207: ($audom ne $env{'request.role.domain'}))) { return ''; }
3208: }
3209: return $thisallowed;
3210: }
3211: #
3212: # Gathered so far: system, domain and course wide privileges
3213: #
3214: # Course: See if uri or referer is an individual resource that is part of
3215: # the course
3216:
3217: if ($env{'request.course.id'}) {
3218:
3219: $courseprivid=$env{'request.course.id'};
3220: if ($env{'request.course.sec'}) {
3221: $courseprivid.='/'.$env{'request.course.sec'};
3222: }
3223: $courseprivid=~s/\_/\//;
3224: my $checkreferer=1;
3225: my ($match,$cond)=&is_on_map($uri);
3226: if ($match) {
3227: $statecond=$cond;
3228: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3229: =~/\Q$priv\E\&([^\:]*)/) {
3230: $thisallowed.=$1;
3231: $checkreferer=0;
3232: }
3233: }
3234:
3235: if ($checkreferer) {
3236: my $refuri=$env{'httpref.'.$orguri};
3237: unless ($refuri) {
3238: foreach (keys %env) {
3239: if ($_=~/^httpref\..*\*/) {
3240: my $pattern=$_;
3241: $pattern=~s/^httpref\.\/res\///;
3242: $pattern=~s/\*/\[\^\/\]\+/g;
3243: $pattern=~s/\//\\\//g;
3244: if ($orguri=~/$pattern/) {
3245: $refuri=$env{$_};
3246: }
3247: }
3248: }
3249: }
3250:
3251: if ($refuri) {
3252: $refuri=&declutter($refuri);
3253: my ($match,$cond)=&is_on_map($refuri);
3254: if ($match) {
3255: my $refstatecond=$cond;
3256: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3257: =~/\Q$priv\E\&([^\:]*)/) {
3258: $thisallowed.=$1;
3259: $uri=$refuri;
3260: $statecond=$refstatecond;
3261: }
3262: }
3263: }
3264: }
3265: }
3266:
3267: #
3268: # Gathered now: all privileges that could apply, and condition number
3269: #
3270: #
3271: # Full or no access?
3272: #
3273:
3274: if ($thisallowed=~/F/) {
3275: return 'F';
3276: }
3277:
3278: unless ($thisallowed) {
3279: return '';
3280: }
3281:
3282: # Restrictions exist, deal with them
3283: #
3284: # C:according to course preferences
3285: # R:according to resource settings
3286: # L:unless locked
3287: # X:according to user session state
3288: #
3289:
3290: # Possibly locked functionality, check all courses
3291: # Locks might take effect only after 10 minutes cache expiration for other
3292: # courses, and 2 minutes for current course
3293:
3294: my $envkey;
3295: if ($thisallowed=~/L/) {
3296: foreach $envkey (keys %env) {
3297: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3298: my $courseid=$2;
3299: my $roleid=$1.'.'.$2;
3300: $courseid=~s/^\///;
3301: my $expiretime=600;
3302: if ($env{'request.role'} eq $roleid) {
3303: $expiretime=120;
3304: }
3305: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3306: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3307: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3308: &coursedescription($courseid);
3309: }
3310: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3311: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3312: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3313: &log($env{'user.domain'},$env{'user.name'},
3314: $env{'user.home'},
3315: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3316: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3317: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3318: return '';
3319: }
3320: }
3321: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3322: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3323: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3324: &log($env{'user.domain'},$env{'user.name'},
3325: $env{'user.home'},
3326: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3327: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3328: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3329: return '';
3330: }
3331: }
3332: }
3333: }
3334: }
3335:
3336: #
3337: # Rest of the restrictions depend on selected course
3338: #
3339:
3340: unless ($env{'request.course.id'}) {
3341: return '1';
3342: }
3343:
3344: #
3345: # Now user is definitely in a course
3346: #
3347:
3348:
3349: # Course preferences
3350:
3351: if ($thisallowed=~/C/) {
3352: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3353: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
3354: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
3355: =~/\Q$rolecode\E/) {
3356: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3357: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3358: $env{'request.course.id'});
3359: return '';
3360: }
3361:
3362: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
3363: =~/\Q$unamedom\E/) {
3364: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
3365: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3366: $env{'request.course.id'});
3367: return '';
3368: }
3369: }
3370:
3371: # Resource preferences
3372:
3373: if ($thisallowed=~/R/) {
3374: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3375: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3376: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3377: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3378: return '';
3379: }
3380: }
3381:
3382: # Restricted by state or randomout?
3383:
3384: if ($thisallowed=~/X/) {
3385: if ($env{'acc.randomout'}) {
3386: if (!$symb) { $symb=&symbread($uri,1); }
3387: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3388: return '';
3389: }
3390: }
3391: if (&condval($statecond)) {
3392: return '2';
3393: } else {
3394: return '';
3395: }
3396: }
3397:
3398: return 'F';
3399: }
3400:
3401: # --------------------------------------------------- Is a resource on the map?
3402:
3403: sub is_on_map {
3404: my $uri=&deversion(&declutter(shift));
3405: my @uriparts=split(/\//,$uri);
3406: my $filename=$uriparts[$#uriparts];
3407: my $pathname=$uri;
3408: $pathname=~s|/\Q$filename\E$||;
3409: $pathname=~s/^adm\/wrapper\///;
3410: #Trying to find the conditional for the file
3411: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3412: /\&\Q$filename\E\:([\d\|]+)\&/);
3413: if ($match) {
3414: return (1,$1);
3415: } else {
3416: return (0,0);
3417: }
3418: }
3419:
3420: # --------------------------------------------------------- Get symb from alias
3421:
3422: sub get_symb_from_alias {
3423: my $symb=shift;
3424: my ($map,$resid,$url)=&decode_symb($symb);
3425: # Already is a symb
3426: if ($url) { return $symb; }
3427: # Must be an alias
3428: my $aliassymb='';
3429: my %bighash;
3430: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
3431: &GDBM_READER(),0640)) {
3432: my $rid=$bighash{'mapalias_'.$symb};
3433: if ($rid) {
3434: my ($mapid,$resid)=split(/\./,$rid);
3435: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3436: $resid,$bighash{'src_'.$rid});
3437: }
3438: untie %bighash;
3439: }
3440: return $aliassymb;
3441: }
3442:
3443: # ----------------------------------------------------------------- Define Role
3444:
3445: sub definerole {
3446: if (allowed('mcr','/')) {
3447: my ($rolename,$sysrole,$domrole,$courole)=@_;
3448: foreach (split(':',$sysrole)) {
3449: my ($crole,$cqual)=split(/\&/,$_);
3450: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3451: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3452: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3453: return "refused:s:$crole&$cqual";
3454: }
3455: }
3456: }
3457: foreach (split(':',$domrole)) {
3458: my ($crole,$cqual)=split(/\&/,$_);
3459: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3460: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3461: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3462: return "refused:d:$crole&$cqual";
3463: }
3464: }
3465: }
3466: foreach (split(':',$courole)) {
3467: my ($crole,$cqual)=split(/\&/,$_);
3468: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3469: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3470: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3471: return "refused:c:$crole&$cqual";
3472: }
3473: }
3474: }
3475: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3476: "$env{'user.domain'}:$env{'user.name'}:".
3477: "rolesdef_$rolename=".
3478: escape($sysrole.'_'.$domrole.'_'.$courole);
3479: return reply($command,$env{'user.home'});
3480: } else {
3481: return 'refused';
3482: }
3483: }
3484:
3485: # ---------------- Make a metadata query against the network of library servers
3486:
3487: sub metadata_query {
3488: my ($query,$custom,$customshow,$server_array)=@_;
3489: my %rhash;
3490: my @server_list = (defined($server_array) ? @$server_array
3491: : keys(%libserv) );
3492: for my $server (@server_list) {
3493: unless ($custom or $customshow) {
3494: my $reply=&reply("querysend:".&escape($query),$server);
3495: $rhash{$server}=$reply;
3496: }
3497: else {
3498: my $reply=&reply("querysend:".&escape($query).':'.
3499: &escape($custom).':'.&escape($customshow),
3500: $server);
3501: $rhash{$server}=$reply;
3502: }
3503: }
3504: return \%rhash;
3505: }
3506:
3507: # ----------------------------------------- Send log queries and wait for reply
3508:
3509: sub log_query {
3510: my ($uname,$udom,$query,%filters)=@_;
3511: my $uhome=&homeserver($uname,$udom);
3512: if ($uhome eq 'no_host') { return 'error: no_host'; }
3513: my $uhost=$hostname{$uhome};
3514: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3515: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3516: $uhome);
3517: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3518: return get_query_reply($queryid);
3519: }
3520:
3521: # ------- Request retrieval of institutional classlists for course(s)
3522:
3523: sub fetch_enrollment_query {
3524: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3525: my $homeserver;
3526: my $maxtries = 1;
3527: if ($context eq 'automated') {
3528: $homeserver = $perlvar{'lonHostID'};
3529: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3530: } else {
3531: $homeserver = &homeserver($cnum,$dom);
3532: }
3533: my $host=$hostname{$homeserver};
3534: my $cmd = '';
3535: foreach (keys %{$affiliatesref}) {
3536: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3537: }
3538: $cmd =~ s/%%$//;
3539: $cmd = &escape($cmd);
3540: my $query = 'fetchenrollment';
3541: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
3542: unless ($queryid=~/^\Q$host\E\_/) {
3543: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3544: return 'error: '.$queryid;
3545: }
3546: my $reply = &get_query_reply($queryid);
3547: my $tries = 1;
3548: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3549: $reply = &get_query_reply($queryid);
3550: $tries ++;
3551: }
3552: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3553: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3554: } else {
3555: my @responses = split/:/,$reply;
3556: if ($homeserver eq $perlvar{'lonHostID'}) {
3557: foreach (@responses) {
3558: my ($key,$value) = split/=/,$_;
3559: $$replyref{$key} = $value;
3560: }
3561: } else {
3562: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3563: foreach (@responses) {
3564: my ($key,$value) = split/=/,$_;
3565: $$replyref{$key} = $value;
3566: if ($value > 0) {
3567: foreach (@{$$affiliatesref{$key}}) {
3568: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3569: my $destname = $pathname.'/'.$filename;
3570: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3571: if ($xml_classlist =~ /^error/) {
3572: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3573: } else {
3574: if ( open(FILE,">$destname") ) {
3575: print FILE &unescape($xml_classlist);
3576: close(FILE);
3577: } else {
3578: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3579: }
3580: }
3581: }
3582: }
3583: }
3584: }
3585: return 'ok';
3586: }
3587: return 'error';
3588: }
3589:
3590: sub get_query_reply {
3591: my $queryid=shift;
3592: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3593: my $reply='';
3594: for (1..100) {
3595: sleep 2;
3596: if (-e $replyfile.'.end') {
3597: if (open(my $fh,$replyfile)) {
3598: $reply.=<$fh>;
3599: close($fh);
3600: } else { return 'error: reply_file_error'; }
3601: return &unescape($reply);
3602: }
3603: }
3604: return 'timeout:'.$queryid;
3605: }
3606:
3607: sub courselog_query {
3608: #
3609: # possible filters:
3610: # url: url or symb
3611: # username
3612: # domain
3613: # action: view, submit, grade
3614: # start: timestamp
3615: # end: timestamp
3616: #
3617: my (%filters)=@_;
3618: unless ($env{'request.course.id'}) { return 'no_course'; }
3619: if ($filters{'url'}) {
3620: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3621: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3622: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3623: }
3624: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
3625: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
3626: return &log_query($cname,$cdom,'courselog',%filters);
3627: }
3628:
3629: sub userlog_query {
3630: my ($uname,$udom,%filters)=@_;
3631: return &log_query($uname,$udom,'userlog',%filters);
3632: }
3633:
3634: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3635:
3636: sub auto_run {
3637: my ($cnum,$cdom) = @_;
3638: my $homeserver = &homeserver($cnum,$cdom);
3639: my $response = &reply('autorun:'.$cdom,$homeserver);
3640: return $response;
3641: }
3642:
3643: sub auto_get_sections {
3644: my ($cnum,$cdom,$inst_coursecode) = @_;
3645: my $homeserver = &homeserver($cnum,$cdom);
3646: my @secs = ();
3647: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3648: unless ($response eq 'refused') {
3649: @secs = split/:/,$response;
3650: }
3651: return @secs;
3652: }
3653:
3654: sub auto_new_course {
3655: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3656: my $homeserver = &homeserver($cnum,$cdom);
3657: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3658: return $response;
3659: }
3660:
3661: sub auto_validate_courseID {
3662: my ($cnum,$cdom,$inst_course_id) = @_;
3663: my $homeserver = &homeserver($cnum,$cdom);
3664: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3665: return $response;
3666: }
3667:
3668: sub auto_create_password {
3669: my ($cnum,$cdom,$authparam) = @_;
3670: my $homeserver = &homeserver($cnum,$cdom);
3671: my $create_passwd = 0;
3672: my $authchk = '';
3673: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3674: if ($response eq 'refused') {
3675: $authchk = 'refused';
3676: } else {
3677: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3678: }
3679: return ($authparam,$create_passwd,$authchk);
3680: }
3681:
3682: sub auto_instcode_format {
3683: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3684: my $courses = '';
3685: my $homeserver;
3686: if ($caller eq 'global') {
3687: foreach my $tryserver (keys %libserv) {
3688: if ($hostdom{$tryserver} eq $codedom) {
3689: $homeserver = $tryserver;
3690: last;
3691: }
3692: }
3693: if (($env{'user.name'}) && ($env{'user.domain'} eq $codedom)) {
3694: $homeserver = &homeserver($env{'user.name'},$codedom);
3695: }
3696: } else {
3697: $homeserver = &homeserver($caller,$codedom);
3698: }
3699: foreach (keys %{$instcodes}) {
3700: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3701: }
3702: chop($courses);
3703: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3704: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3705: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3706: %{$codes} = &str2hash($codes_str);
3707: @{$codetitles} = &str2array($codetitles_str);
3708: %{$cat_titles} = &str2hash($cat_titles_str);
3709: %{$cat_order} = &str2hash($cat_order_str);
3710: return 'ok';
3711: }
3712: return $response;
3713: }
3714:
3715: # ------------------------------------------------------- Course Group routines
3716:
3717: sub get_coursegroups {
3718: my ($cdom,$cnum,$group) = @_;
3719: return(&dump('coursegroups',$cdom,$cnum,$group));
3720: }
3721:
3722: sub modify_coursegroup {
3723: my ($cdom,$cnum,$groupsettings) = @_;
3724: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
3725: }
3726:
3727: sub modify_group_roles {
3728: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
3729: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
3730: my $role = 'gr/'.&escape($userprivs);
3731: my ($uname,$udom) = split(/:/,$user);
3732: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
3733: if ($result eq 'ok') {
3734: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
3735: }
3736:
3737: return $result;
3738: }
3739:
3740: sub modify_coursegroup_membership {
3741: my ($cdom,$cnum,$membership) = @_;
3742: my $result = &put('groupmembership',$membership,$cdom,$cnum);
3743: return $result;
3744: }
3745:
3746: sub get_active_groups {
3747: my ($udom,$uname,$cdom,$cnum) = @_;
3748: my $now = time;
3749: my %groups = ();
3750: foreach my $key (keys(%env)) {
3751: if ($key =~ m-user\.role\.gr\./([^/]+)/([^/]+)/(\w+)$-) {
3752: my ($start,$end) = split(/\./,$env{$key});
3753: if (($end!=0) && ($end<$now)) { next; }
3754: if (($start!=0) && ($start>$now)) { next; }
3755: if ($1 eq $cdom && $2 eq $cnum) {
3756: $groups{$3} = $env{$key} ;
3757: }
3758: }
3759: }
3760: return %groups;
3761: }
3762:
3763: sub get_group_membership {
3764: my ($cdom,$cnum,$group) = @_;
3765: return(&dump('groupmembership',$cdom,$cnum,$group));
3766: }
3767:
3768: sub get_users_groups {
3769: my ($udom,$uname,$courseid) = @_;
3770: my $cachetime=1800;
3771: $courseid=~s/\_/\//g;
3772: $courseid=~s/^(\w)/\/$1/;
3773:
3774: my $hashid="$udom:$uname:$courseid";
3775: my ($result,$cached)=&is_cached_new('getgroups',$hashid);
3776: if (defined($cached)) { return $result; }
3777:
3778: my %roleshash = &dump('roles',$udom,$uname,$courseid);
3779: my ($tmp) = keys(%roleshash);
3780: if ($tmp=~/^error:/) {
3781: &logthis('Error retrieving roles: '.$tmp.' for '.$uname.':'.$udom);
3782: return '';
3783: } else {
3784: my $grouplist;
3785: foreach my $key (keys %roleshash) {
3786: if ($key =~ /^\Q$courseid\E\/(\w+)\_gr$/) {
3787: unless ($roleshash{$key} =~ /_1_1$/) { # deleted membership
3788: $grouplist .= $1.':';
3789: }
3790: }
3791: }
3792: $grouplist =~ s/:$//;
3793: return &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
3794: }
3795: }
3796:
3797: sub devalidate_getgroups_cache {
3798: my ($udom,$uname,$cdom,$cnum)=@_;
3799: my $courseid = $cdom.'_'.$cnum;
3800: $courseid=~s/\_/\//g;
3801: $courseid=~s/^(\w)/\/$1/;
3802: my $hashid="$udom:$uname:$courseid";
3803: &devalidate_cache_new('getgroups',$hashid);
3804: }
3805:
3806: # ------------------------------------------------------------------ Plain Text
3807:
3808: sub plaintext {
3809: my $short=shift;
3810: return &Apache::lonlocal::mt($prp{$short});
3811: }
3812:
3813: # ----------------------------------------------------------------- Assign Role
3814:
3815: sub assignrole {
3816: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3817: my $mrole;
3818: if ($role =~ /^cr\//) {
3819: my $cwosec=$url;
3820: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3821: unless (&allowed('ccr',$cwosec)) {
3822: &logthis('Refused custom assignrole: '.
3823: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3824: $env{'user.name'}.' at '.$env{'user.domain'});
3825: return 'refused';
3826: }
3827: $mrole='cr';
3828: } elsif ($role =~ /^gr\//) {
3829: my $cwogrp=$url;
3830: $cwogrp=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3831: unless (&allowed('mdg',$cwogrp)) {
3832: &logthis('Refused group assignrole: '.
3833: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3834: $env{'user.name'}.' at '.$env{'user.domain'});
3835: return 'refused';
3836: }
3837: $mrole='gr';
3838: } else {
3839: my $cwosec=$url;
3840: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3841: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3842: &logthis('Refused assignrole: '.
3843: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3844: $env{'user.name'}.' at '.$env{'user.domain'});
3845: return 'refused';
3846: }
3847: $mrole=$role;
3848: }
3849: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3850: "$udom:$uname:$url".'_'."$mrole=$role";
3851: if ($end) { $command.='_'.$end; }
3852: if ($start) {
3853: if ($end) {
3854: $command.='_'.$start;
3855: } else {
3856: $command.='_0_'.$start;
3857: }
3858: }
3859: # actually delete
3860: if ($deleteflag) {
3861: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3862: # modify command to delete the role
3863: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
3864: "$udom:$uname:$url".'_'."$mrole";
3865: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
3866: # set start and finish to negative values for userrolelog
3867: $start=-1;
3868: $end=-1;
3869: }
3870: }
3871: # send command
3872: my $answer=&reply($command,&homeserver($uname,$udom));
3873: # log new user role if status is ok
3874: if ($answer eq 'ok') {
3875: &userrolelog($role,$uname,$udom,$url,$start,$end);
3876: }
3877: return $answer;
3878: }
3879:
3880: # -------------------------------------------------- Modify user authentication
3881: # Overrides without validation
3882:
3883: sub modifyuserauth {
3884: my ($udom,$uname,$umode,$upass)=@_;
3885: my $uhome=&homeserver($uname,$udom);
3886: unless (&allowed('mau',$udom)) { return 'refused'; }
3887: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3888: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
3889: ' in domain '.$env{'request.role.domain'});
3890: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3891: &escape($upass),$uhome);
3892: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
3893: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3894: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3895: &log($udom,,$uname,$uhome,
3896: 'Authentication changed by '.$env{'user.domain'}.', '.
3897: $env{'user.name'}.', '.$umode.
3898: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3899: unless ($reply eq 'ok') {
3900: &logthis('Authentication mode error: '.$reply);
3901: return 'error: '.$reply;
3902: }
3903: return 'ok';
3904: }
3905:
3906: # --------------------------------------------------------------- Modify a user
3907:
3908: sub modifyuser {
3909: my ($udom, $uname, $uid,
3910: $umode, $upass, $first,
3911: $middle, $last, $gene,
3912: $forceid, $desiredhome, $email)=@_;
3913: $udom=~s/\W//g;
3914: $uname=~s/\W//g;
3915: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3916: $umode.', '.$first.', '.$middle.', '.
3917: $last.', '.$gene.'(forceid: '.$forceid.')'.
3918: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3919: ' desiredhome not specified').
3920: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
3921: ' in domain '.$env{'request.role.domain'});
3922: my $uhome=&homeserver($uname,$udom,'true');
3923: # ----------------------------------------------------------------- Create User
3924: if (($uhome eq 'no_host') &&
3925: (($umode && $upass) || ($umode eq 'localauth'))) {
3926: my $unhome='';
3927: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3928: $unhome = $desiredhome;
3929: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
3930: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
3931: } else { # load balancing routine for determining $unhome
3932: my $tryserver;
3933: my $loadm=10000000;
3934: foreach $tryserver (keys %libserv) {
3935: if ($hostdom{$tryserver} eq $udom) {
3936: my $answer=reply('load',$tryserver);
3937: if (($answer=~/\d+/) && ($answer<$loadm)) {
3938: $loadm=$answer;
3939: $unhome=$tryserver;
3940: }
3941: }
3942: }
3943: }
3944: if (($unhome eq '') || ($unhome eq 'no_host')) {
3945: return 'error: unable to find a home server for '.$uname.
3946: ' in domain '.$udom;
3947: }
3948: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3949: &escape($upass),$unhome);
3950: unless ($reply eq 'ok') {
3951: return 'error: '.$reply;
3952: }
3953: $uhome=&homeserver($uname,$udom,'true');
3954: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3955: return 'error: unable verify users home machine.';
3956: }
3957: } # End of creation of new user
3958: # ---------------------------------------------------------------------- Add ID
3959: if ($uid) {
3960: $uid=~tr/A-Z/a-z/;
3961: my %uidhash=&idrget($udom,$uname);
3962: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3963: && (!$forceid)) {
3964: unless ($uid eq $uidhash{$uname}) {
3965: return 'error: user id "'.$uid.'" does not match '.
3966: 'current user id "'.$uidhash{$uname}.'".';
3967: }
3968: } else {
3969: &idput($udom,($uname => $uid));
3970: }
3971: }
3972: # -------------------------------------------------------------- Add names, etc
3973: my @tmp=&get('environment',
3974: ['firstname','middlename','lastname','generation'],
3975: $udom,$uname);
3976: my %names;
3977: if ($tmp[0] =~ m/^error:.*/) {
3978: %names=();
3979: } else {
3980: %names = @tmp;
3981: }
3982: #
3983: # Make sure to not trash student environment if instructor does not bother
3984: # to supply name and email information
3985: #
3986: if ($first) { $names{'firstname'} = $first; }
3987: if (defined($middle)) { $names{'middlename'} = $middle; }
3988: if ($last) { $names{'lastname'} = $last; }
3989: if (defined($gene)) { $names{'generation'} = $gene; }
3990: if ($email) {
3991: $email=~s/[^\w\@\.\-\,]//gs;
3992: if ($email=~/\@/) { $names{'notification'} = $email;
3993: $names{'critnotification'} = $email;
3994: $names{'permanentemail'} = $email; }
3995: }
3996: my $reply = &put('environment', \%names, $udom,$uname);
3997: if ($reply ne 'ok') { return 'error: '.$reply; }
3998: &devalidate_cache_new('namescache',$uname.':'.$udom);
3999: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
4000: $umode.', '.$first.', '.$middle.', '.
4001: $last.', '.$gene.' by '.
4002: $env{'user.name'}.' at '.$env{'user.domain'});
4003: return 'ok';
4004: }
4005:
4006: # -------------------------------------------------------------- Modify student
4007:
4008: sub modifystudent {
4009: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
4010: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
4011: if (!$cid) {
4012: unless ($cid=$env{'request.course.id'}) {
4013: return 'not_in_class';
4014: }
4015: }
4016: # --------------------------------------------------------------- Make the user
4017: my $reply=&modifyuser
4018: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
4019: $desiredhome,$email);
4020: unless ($reply eq 'ok') { return $reply; }
4021: # This will cause &modify_student_enrollment to get the uid from the
4022: # students environment
4023: $uid = undef if (!$forceid);
4024: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
4025: $gene,$usec,$end,$start,$type,$locktype,$cid);
4026: return $reply;
4027: }
4028:
4029: sub modify_student_enrollment {
4030: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
4031: my ($cdom,$cnum,$chome);
4032: if (!$cid) {
4033: unless ($cid=$env{'request.course.id'}) {
4034: return 'not_in_class';
4035: }
4036: $cdom=$env{'course.'.$cid.'.domain'};
4037: $cnum=$env{'course.'.$cid.'.num'};
4038: } else {
4039: ($cdom,$cnum)=split(/_/,$cid);
4040: }
4041: $chome=$env{'course.'.$cid.'.home'};
4042: if (!$chome) {
4043: $chome=&homeserver($cnum,$cdom);
4044: }
4045: if (!$chome) { return 'unknown_course'; }
4046: # Make sure the user exists
4047: my $uhome=&homeserver($uname,$udom);
4048: if (($uhome eq '') || ($uhome eq 'no_host')) {
4049: return 'error: no such user';
4050: }
4051: # Get student data if we were not given enough information
4052: if (!defined($first) || $first eq '' ||
4053: !defined($last) || $last eq '' ||
4054: !defined($uid) || $uid eq '' ||
4055: !defined($middle) || $middle eq '' ||
4056: !defined($gene) || $gene eq '') {
4057: # They did not supply us with enough data to enroll the student, so
4058: # we need to pick up more information.
4059: my %tmp = &get('environment',
4060: ['firstname','middlename','lastname', 'generation','id']
4061: ,$udom,$uname);
4062:
4063: #foreach (keys(%tmp)) {
4064: # &logthis("key $_ = ".$tmp{$_});
4065: #}
4066: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
4067: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
4068: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
4069: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
4070: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
4071: }
4072: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
4073: my $reply=cput('classlist',
4074: {"$uname:$udom" =>
4075: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
4076: $cdom,$cnum);
4077: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
4078: return 'error: '.$reply;
4079: } else {
4080: &devalidate_getsection_cache($udom,$uname,$cid);
4081: }
4082: # Add student role to user
4083: my $uurl='/'.$cid;
4084: $uurl=~s/\_/\//g;
4085: if ($usec) {
4086: $uurl.='/'.$usec;
4087: }
4088: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
4089: }
4090:
4091: sub format_name {
4092: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
4093: my $name;
4094: if ($first ne 'lastname') {
4095: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
4096: } else {
4097: if ($lastname=~/\S/) {
4098: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
4099: $name=~s/\s+,/,/;
4100: } else {
4101: $name.= $firstname.' '.$middlename.' '.$generation;
4102: }
4103: }
4104: $name=~s/^\s+//;
4105: $name=~s/\s+$//;
4106: $name=~s/\s+/ /g;
4107: return $name;
4108: }
4109:
4110: # ------------------------------------------------- Write to course preferences
4111:
4112: sub writecoursepref {
4113: my ($courseid,%prefs)=@_;
4114: $courseid=~s/^\///;
4115: $courseid=~s/\_/\//g;
4116: my ($cdomain,$cnum)=split(/\//,$courseid);
4117: my $chome=homeserver($cnum,$cdomain);
4118: if (($chome eq '') || ($chome eq 'no_host')) {
4119: return 'error: no such course';
4120: }
4121: my $cstring='';
4122: foreach (keys %prefs) {
4123: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
4124: }
4125: $cstring=~s/\&$//;
4126: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
4127: }
4128:
4129: # ---------------------------------------------------------- Make/modify course
4130:
4131: sub createcourse {
4132: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_;
4133: $url=&declutter($url);
4134: my $cid='';
4135: unless (&allowed('ccc',$udom)) {
4136: return 'refused';
4137: }
4138: # ------------------------------------------------------------------- Create ID
4139: my $uname=int(1+rand(9)).
4140: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
4141: substr($$.time,0,5).unpack("H8",pack("I32",time)).
4142: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4143: # ----------------------------------------------- Make sure that does not exist
4144: my $uhome=&homeserver($uname,$udom,'true');
4145: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4146: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
4147: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4148: $uhome=&homeserver($uname,$udom,'true');
4149: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4150: return 'error: unable to generate unique course-ID';
4151: }
4152: }
4153: # ------------------------------------------------ Check supplied server name
4154: $course_server = $env{'user.homeserver'} if (! defined($course_server));
4155: if (! exists($libserv{$course_server})) {
4156: return 'error:bad server name '.$course_server;
4157: }
4158: # ------------------------------------------------------------- Make the course
4159: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
4160: $course_server);
4161: unless ($reply eq 'ok') { return 'error: '.$reply; }
4162: $uhome=&homeserver($uname,$udom,'true');
4163: if (($uhome eq '') || ($uhome eq 'no_host')) {
4164: return 'error: no such course';
4165: }
4166: # ----------------------------------------------------------------- Course made
4167: # log existence
4168: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
4169: ':'.&escape($inst_code).':'.&escape($course_owner),$uhome);
4170: &flushcourselogs();
4171: # set toplevel url
4172: my $topurl=$url;
4173: unless ($nonstandard) {
4174: # ------------------------------------------ For standard courses, make top url
4175: my $mapurl=&clutter($url);
4176: if ($mapurl eq '/res/') { $mapurl=''; }
4177: $env{'form.initmap'}=(<<ENDINITMAP);
4178: <map>
4179: <resource id="1" type="start"></resource>
4180: <resource id="2" src="$mapurl"></resource>
4181: <resource id="3" type="finish"></resource>
4182: <link index="1" from="1" to="2"></link>
4183: <link index="2" from="2" to="3"></link>
4184: </map>
4185: ENDINITMAP
4186: $topurl=&declutter(
4187: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
4188: );
4189: }
4190: # ----------------------------------------------------------- Write preferences
4191: &writecoursepref($udom.'_'.$uname,
4192: ('description' => $description,
4193: 'url' => $topurl));
4194: return '/'.$udom.'/'.$uname;
4195: }
4196:
4197: # ---------------------------------------------------------- Assign Custom Role
4198:
4199: sub assigncustomrole {
4200: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
4201: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
4202: $end,$start,$deleteflag);
4203: }
4204:
4205: # ----------------------------------------------------------------- Revoke Role
4206:
4207: sub revokerole {
4208: my ($udom,$uname,$url,$role,$deleteflag)=@_;
4209: my $now=time;
4210: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
4211: }
4212:
4213: # ---------------------------------------------------------- Revoke Custom Role
4214:
4215: sub revokecustomrole {
4216: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
4217: my $now=time;
4218: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
4219: $deleteflag);
4220: }
4221:
4222: # ------------------------------------------------------------ Disk usage
4223: sub diskusage {
4224: my ($udom,$uname,$directoryRoot)=@_;
4225: $directoryRoot =~ s/\/$//;
4226: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
4227: return $listing;
4228: }
4229:
4230: sub is_locked {
4231: my ($file_name, $domain, $user) = @_;
4232: my @check;
4233: my $is_locked;
4234: push @check, $file_name;
4235: my %locked = &get('file_permissions',\@check,
4236: $env{'user.domain'},$env{'user.name'});
4237: my ($tmp)=keys(%locked);
4238: if ($tmp=~/^error:/) { undef(%locked); }
4239:
4240: if (ref($locked{$file_name}) eq 'ARRAY') {
4241: $is_locked = 'true';
4242: } else {
4243: $is_locked = 'false';
4244: }
4245: }
4246:
4247: # ------------------------------------------------------------- Mark as Read Only
4248:
4249: sub mark_as_readonly {
4250: my ($domain,$user,$files,$what) = @_;
4251: my %current_permissions = &dump('file_permissions',$domain,$user);
4252: my ($tmp)=keys(%current_permissions);
4253: if ($tmp=~/^error:/) { undef(%current_permissions); }
4254: foreach my $file (@{$files}) {
4255: push(@{$current_permissions{$file}},$what);
4256: }
4257: &put('file_permissions',\%current_permissions,$domain,$user);
4258: return;
4259: }
4260:
4261: # ------------------------------------------------------------Save Selected Files
4262:
4263: sub save_selected_files {
4264: my ($user, $path, @files) = @_;
4265: my $filename = $user."savedfiles";
4266: my @other_files = &files_not_in_path($user, $path);
4267: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4268: foreach my $file (@files) {
4269: print (OUT $env{'form.currentpath'}.$file."\n");
4270: }
4271: foreach my $file (@other_files) {
4272: print (OUT $file."\n");
4273: }
4274: close (OUT);
4275: return 'ok';
4276: }
4277:
4278: sub clear_selected_files {
4279: my ($user) = @_;
4280: my $filename = $user."savedfiles";
4281: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4282: print (OUT undef);
4283: close (OUT);
4284: return ("ok");
4285: }
4286:
4287: sub files_in_path {
4288: my ($user, $path) = @_;
4289: my $filename = $user."savedfiles";
4290: my %return_files;
4291: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4292: while (my $line_in = <IN>) {
4293: chomp ($line_in);
4294: my @paths_and_file = split (m!/!, $line_in);
4295: my $file_part = pop (@paths_and_file);
4296: my $path_part = join ('/', @paths_and_file);
4297: $path_part.='/';
4298: my $path_and_file = $path_part.$file_part;
4299: if ($path_part eq $path) {
4300: $return_files{$file_part}= 'selected';
4301: }
4302: }
4303: close (IN);
4304: return (\%return_files);
4305: }
4306:
4307: # called in portfolio select mode, to show files selected NOT in current directory
4308: sub files_not_in_path {
4309: my ($user, $path) = @_;
4310: my $filename = $user."savedfiles";
4311: my @return_files;
4312: my $path_part;
4313: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4314: while (<IN>) {
4315: #ok, I know it's clunky, but I want it to work
4316: my @paths_and_file = split m!/!, $_;
4317: my $file_part = pop (@paths_and_file);
4318: chomp ($file_part);
4319: my $path_part = join ('/', @paths_and_file);
4320: $path_part .= '/';
4321: my $path_and_file = $path_part.$file_part;
4322: if ($path_part ne $path) {
4323: push (@return_files, ($path_and_file));
4324: }
4325: }
4326: close (OUT);
4327: return (@return_files);
4328: }
4329:
4330: #--------------------------------------------------------------Get Marked as Read Only
4331:
4332:
4333: sub get_marked_as_readonly {
4334: my ($domain,$user,$what) = @_;
4335: my %current_permissions = &dump('file_permissions',$domain,$user);
4336: my ($tmp)=keys(%current_permissions);
4337: if ($tmp=~/^error:/) { undef(%current_permissions); }
4338: my @readonly_files;
4339: my $cmp1=$what;
4340: if (ref($what)) { $cmp1=join('',@{$what}) };
4341: while (my ($file_name,$value) = each(%current_permissions)) {
4342: if (ref($value) eq "ARRAY"){
4343: foreach my $stored_what (@{$value}) {
4344: my $cmp2=$stored_what;
4345: if (ref($stored_what)) { $cmp2=join('',@{$stored_what}) };
4346: if ($cmp1 eq $cmp2) {
4347: push(@readonly_files, $file_name);
4348: } elsif (!defined($what)) {
4349: push(@readonly_files, $file_name);
4350: }
4351: }
4352: }
4353: }
4354: return @readonly_files;
4355: }
4356: #-----------------------------------------------------------Get Marked as Read Only Hash
4357:
4358: sub get_marked_as_readonly_hash {
4359: my ($domain,$user,$what) = @_;
4360: my %current_permissions = &dump('file_permissions',$domain,$user);
4361: my ($tmp)=keys(%current_permissions);
4362: if ($tmp=~/^error:/) { undef(%current_permissions); }
4363:
4364: my %readonly_files;
4365: while (my ($file_name,$value) = each(%current_permissions)) {
4366: if (ref($value) eq "ARRAY"){
4367: foreach my $stored_what (@{$value}) {
4368: if ($stored_what eq $what) {
4369: $readonly_files{$file_name} = 'locked';
4370: } elsif (!defined($what)) {
4371: $readonly_files{$file_name} = 'locked';
4372: }
4373: }
4374: }
4375: }
4376: return %readonly_files;
4377: }
4378: # ------------------------------------------------------------ Unmark as Read Only
4379:
4380: sub unmark_as_readonly {
4381: # unmarks $file_name (if $file_name is defined), or all files locked by $what
4382: # for portfolio submissions, $what contains [$symb,$crsid]
4383: my ($domain,$user,$what,$file_name) = @_;
4384: my $symb_crs = $what;
4385: if (ref($what)) { $symb_crs=join('',@$what); }
4386: my %current_permissions = &dump('file_permissions',$domain,$user);
4387: my ($tmp)=keys(%current_permissions);
4388: if ($tmp=~/^error:/) { undef(%current_permissions); }
4389: my @readonly_files = &get_marked_as_readonly($domain,$user,$what);
4390: foreach my $file (@readonly_files) {
4391: if (defined($file_name) && ($file_name ne $file)) { next; }
4392: my $current_locks = $current_permissions{$file};
4393: my @new_locks;
4394: my @del_keys;
4395: if (ref($current_locks) eq "ARRAY"){
4396: foreach my $locker (@{$current_locks}) {
4397: my $compare=$locker;
4398: if (ref($locker)) { $compare=join('',@{$locker}) };
4399: if ($compare ne $symb_crs) {
4400: push(@new_locks, $locker);
4401: }
4402: }
4403: if (scalar(@new_locks) > 0) {
4404: $current_permissions{$file} = \@new_locks;
4405: } else {
4406: push(@del_keys, $file);
4407: &del('file_permissions',\@del_keys, $domain, $user);
4408: delete($current_permissions{$file});
4409: }
4410: }
4411: }
4412: &put('file_permissions',\%current_permissions,$domain,$user);
4413: return;
4414: }
4415:
4416: # ------------------------------------------------------------ Directory lister
4417:
4418: sub dirlist {
4419: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
4420:
4421: $uri=~s/^\///;
4422: $uri=~s/\/$//;
4423: my ($udom, $uname);
4424: (undef,$udom,$uname)=split(/\//,$uri);
4425: if(defined($userdomain)) {
4426: $udom = $userdomain;
4427: }
4428: if(defined($username)) {
4429: $uname = $username;
4430: }
4431:
4432: my $dirRoot = $perlvar{'lonDocRoot'};
4433: if(defined($alternateDirectoryRoot)) {
4434: $dirRoot = $alternateDirectoryRoot;
4435: $dirRoot =~ s/\/$//;
4436: }
4437:
4438: if($udom) {
4439: if($uname) {
4440: my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
4441: homeserver($uname,$udom));
4442: my @listing_results;
4443: if ($listing eq 'unknown_cmd') {
4444: $listing=reply('ls:'.$dirRoot.'/'.$uri,
4445: homeserver($uname,$udom));
4446: @listing_results = split(/:/,$listing);
4447: } else {
4448: @listing_results = map { &unescape($_); } split(/:/,$listing);
4449: }
4450: return @listing_results;
4451: } elsif(!defined($alternateDirectoryRoot)) {
4452: my $tryserver;
4453: my %allusers=();
4454: foreach $tryserver (keys %libserv) {
4455: if($hostdom{$tryserver} eq $udom) {
4456: my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
4457: $udom, $tryserver);
4458: my @listing_results;
4459: if ($listing eq 'unknown_cmd') {
4460: $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
4461: $udom, $tryserver);
4462: @listing_results = split(/:/,$listing);
4463: } else {
4464: @listing_results =
4465: map { &unescape($_); } split(/:/,$listing);
4466: }
4467: if ($listing_results[0] ne 'no_such_dir' &&
4468: $listing_results[0] ne 'empty' &&
4469: $listing_results[0] ne 'con_lost') {
4470: foreach (@listing_results) {
4471: my ($entry,@stat)=split(/&/,$_);
4472: $allusers{$entry}=1;
4473: }
4474: }
4475: }
4476: }
4477: my $alluserstr='';
4478: foreach (sort keys %allusers) {
4479: $alluserstr.=$_.'&user:';
4480: }
4481: $alluserstr=~s/:$//;
4482: return split(/:/,$alluserstr);
4483: } else {
4484: my @emptyResults = ();
4485: push(@emptyResults, 'missing user name');
4486: return split(':',@emptyResults);
4487: }
4488: } elsif(!defined($alternateDirectoryRoot)) {
4489: my $tryserver;
4490: my %alldom=();
4491: foreach $tryserver (keys %libserv) {
4492: $alldom{$hostdom{$tryserver}}=1;
4493: }
4494: my $alldomstr='';
4495: foreach (sort keys %alldom) {
4496: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
4497: }
4498: $alldomstr=~s/:$//;
4499: return split(/:/,$alldomstr);
4500: } else {
4501: my @emptyResults = ();
4502: push(@emptyResults, 'missing domain');
4503: return split(':',@emptyResults);
4504: }
4505: }
4506:
4507: # --------------------------------------------- GetFileTimestamp
4508: # This function utilizes dirlist and returns the date stamp for
4509: # when it was last modified. It will also return an error of -1
4510: # if an error occurs
4511:
4512: ##
4513: ## FIXME: This subroutine assumes its caller knows something about the
4514: ## directory structure of the home server for the student ($root).
4515: ## Not a good assumption to make. Since this is for looking up files
4516: ## in user directories, the full path should be constructed by lond, not
4517: ## whatever machine we request data from.
4518: ##
4519: sub GetFileTimestamp {
4520: my ($studentDomain,$studentName,$filename,$root)=@_;
4521: $studentDomain=~s/\W//g;
4522: $studentName=~s/\W//g;
4523: my $subdir=$studentName.'__';
4524: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4525: my $proname="$studentDomain/$subdir/$studentName";
4526: $proname .= '/'.$filename;
4527: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
4528: $studentName, $root);
4529: my @stats = split('&', $fileStat);
4530: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4531: # @stats contains first the filename, then the stat output
4532: return $stats[10]; # so this is 10 instead of 9.
4533: } else {
4534: return -1;
4535: }
4536: }
4537:
4538: # -------------------------------------------------------- Value of a Condition
4539:
4540: sub directcondval {
4541: my $number=shift;
4542: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
4543: &Apache::lonuserstate::evalstate();
4544: }
4545: if ($env{'user.state.'.$env{'request.course.id'}}) {
4546: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
4547: } else {
4548: return 2;
4549: }
4550: }
4551:
4552: sub condval {
4553: my $condidx=shift;
4554: my $result=0;
4555: my $allpathcond='';
4556: foreach (split(/\|/,$condidx)) {
4557: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$_})) {
4558: $allpathcond.=
4559: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$_}.')|';
4560: }
4561: }
4562: $allpathcond=~s/\|$//;
4563: if ($env{'request.course.id'}) {
4564: if ($allpathcond) {
4565: my $operand='|';
4566: my @stack;
4567: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
4568: if ($_ eq '(') {
4569: push @stack,($operand,$result)
4570: } elsif ($_ eq ')') {
4571: my $before=pop @stack;
4572: if (pop @stack eq '&') {
4573: $result=$result>$before?$before:$result;
4574: } else {
4575: $result=$result>$before?$result:$before;
4576: }
4577: } elsif (($_ eq '&') || ($_ eq '|')) {
4578: $operand=$_;
4579: } else {
4580: my $new=directcondval($_);
4581: if ($operand eq '&') {
4582: $result=$result>$new?$new:$result;
4583: } else {
4584: $result=$result>$new?$result:$new;
4585: }
4586: }
4587: }
4588: }
4589: }
4590: return $result;
4591: }
4592:
4593: # ---------------------------------------------------- Devalidate courseresdata
4594:
4595: sub devalidatecourseresdata {
4596: my ($coursenum,$coursedomain)=@_;
4597: my $hashid=$coursenum.':'.$coursedomain;
4598: &devalidate_cache_new('courseres',$hashid);
4599: }
4600:
4601: # --------------------------------------------------- Course Resourcedata Query
4602:
4603: sub get_courseresdata {
4604: my ($coursenum,$coursedomain)=@_;
4605: my $coursehom=&homeserver($coursenum,$coursedomain);
4606: my $hashid=$coursenum.':'.$coursedomain;
4607: my ($result,$cached)=&is_cached_new('courseres',$hashid);
4608: my %dumpreply;
4609: unless (defined($cached)) {
4610: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
4611: $result=\%dumpreply;
4612: my ($tmp) = keys(%dumpreply);
4613: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
4614: &do_cache_new('courseres',$hashid,$result,600);
4615: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4616: return $tmp;
4617: } elsif ($tmp =~ /^(error)/) {
4618: $result=undef;
4619: &do_cache_new('courseres',$hashid,$result,600);
4620: }
4621: }
4622: return $result;
4623: }
4624:
4625: sub devalidateuserresdata {
4626: my ($uname,$udom)=@_;
4627: my $hashid="$udom:$uname";
4628: &devalidate_cache_new('userres',$hashid);
4629: }
4630:
4631: sub get_userresdata {
4632: my ($uname,$udom)=@_;
4633: #most student don\'t have any data set, check if there is some data
4634: if (&EXT_cache_status($udom,$uname)) { return undef; }
4635:
4636: my $hashid="$udom:$uname";
4637: my ($result,$cached)=&is_cached_new('userres',$hashid);
4638: if (!defined($cached)) {
4639: my %resourcedata=&dump('resourcedata',$udom,$uname);
4640: $result=\%resourcedata;
4641: &do_cache_new('userres',$hashid,$result,600);
4642: }
4643: my ($tmp)=keys(%$result);
4644: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4645: return $result;
4646: }
4647: #error 2 occurs when the .db doesn't exist
4648: if ($tmp!~/error: 2 /) {
4649: &logthis("<font color=\"blue\">WARNING:".
4650: " Trying to get resource data for ".
4651: $uname." at ".$udom.": ".
4652: $tmp."</font>");
4653: } elsif ($tmp=~/error: 2 /) {
4654: #&EXT_cache_set($udom,$uname);
4655: &do_cache_new('userres',$hashid,undef,600);
4656: undef($tmp); # not really an error so don't send it back
4657: }
4658: return $tmp;
4659: }
4660:
4661: sub resdata {
4662: my ($name,$domain,$type,@which)=@_;
4663: my $result;
4664: if ($type eq 'course') {
4665: $result=&get_courseresdata($name,$domain);
4666: } elsif ($type eq 'user') {
4667: $result=&get_userresdata($name,$domain);
4668: }
4669: if (!ref($result)) { return $result; }
4670: foreach my $item (@which) {
4671: if (defined($result->{$item})) {
4672: return $result->{$item};
4673: }
4674: }
4675: return undef;
4676: }
4677:
4678: #
4679: # EXT resource caching routines
4680: #
4681:
4682: sub clear_EXT_cache_status {
4683: &delenv('cache.EXT.');
4684: }
4685:
4686: sub EXT_cache_status {
4687: my ($target_domain,$target_user) = @_;
4688: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4689: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
4690: # We know already the user has no data
4691: return 1;
4692: } else {
4693: return 0;
4694: }
4695: }
4696:
4697: sub EXT_cache_set {
4698: my ($target_domain,$target_user) = @_;
4699: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4700: #&appenv($cachename => time);
4701: }
4702:
4703: # --------------------------------------------------------- Value of a Variable
4704: sub EXT {
4705: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
4706:
4707: unless ($varname) { return ''; }
4708: #get real user name/domain, courseid and symb
4709: my $courseid;
4710: my $publicuser;
4711: if ($symbparm) {
4712: $symbparm=&get_symb_from_alias($symbparm);
4713: }
4714: if (!($uname && $udom)) {
4715: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
4716: &Apache::lonxml::whichuser($symbparm);
4717: if (!$symbparm) { $symbparm=$cursymb; }
4718: } else {
4719: $courseid=$env{'request.course.id'};
4720: }
4721: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
4722: my $rest;
4723: if (defined($therest[0])) {
4724: $rest=join('.',@therest);
4725: } else {
4726: $rest='';
4727: }
4728:
4729: my $qualifierrest=$qualifier;
4730: if ($rest) { $qualifierrest.='.'.$rest; }
4731: my $spacequalifierrest=$space;
4732: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
4733: if ($realm eq 'user') {
4734: # --------------------------------------------------------------- user.resource
4735: if ($space eq 'resource') {
4736: if ( (defined($Apache::lonhomework::parsing_a_problem)
4737: || defined($Apache::lonhomework::parsing_a_task))
4738: &&
4739: ($symbparm eq &symbread()) ) {
4740: return $Apache::lonhomework::history{$qualifierrest};
4741: } else {
4742: my %restored;
4743: if ($publicuser || $env{'request.state'} eq 'construct') {
4744: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
4745: } else {
4746: %restored=&restore($symbparm,$courseid,$udom,$uname);
4747: }
4748: return $restored{$qualifierrest};
4749: }
4750: # ----------------------------------------------------------------- user.access
4751: } elsif ($space eq 'access') {
4752: # FIXME - not supporting calls for a specific user
4753: return &allowed($qualifier,$rest);
4754: # ------------------------------------------ user.preferences, user.environment
4755: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
4756: if (($uname eq $env{'user.name'}) &&
4757: ($udom eq $env{'user.domain'})) {
4758: return $env{join('.',('environment',$qualifierrest))};
4759: } else {
4760: my %returnhash;
4761: if (!$publicuser) {
4762: %returnhash=&userenvironment($udom,$uname,
4763: $qualifierrest);
4764: }
4765: return $returnhash{$qualifierrest};
4766: }
4767: # ----------------------------------------------------------------- user.course
4768: } elsif ($space eq 'course') {
4769: # FIXME - not supporting calls for a specific user
4770: return $env{join('.',('request.course',$qualifier))};
4771: # ------------------------------------------------------------------- user.role
4772: } elsif ($space eq 'role') {
4773: # FIXME - not supporting calls for a specific user
4774: my ($role,$where)=split(/\./,$env{'request.role'});
4775: if ($qualifier eq 'value') {
4776: return $role;
4777: } elsif ($qualifier eq 'extent') {
4778: return $where;
4779: }
4780: # ----------------------------------------------------------------- user.domain
4781: } elsif ($space eq 'domain') {
4782: return $udom;
4783: # ------------------------------------------------------------------- user.name
4784: } elsif ($space eq 'name') {
4785: return $uname;
4786: # ---------------------------------------------------- Any other user namespace
4787: } else {
4788: my %reply;
4789: if (!$publicuser) {
4790: %reply=&get($space,[$qualifierrest],$udom,$uname);
4791: }
4792: return $reply{$qualifierrest};
4793: }
4794: } elsif ($realm eq 'query') {
4795: # ---------------------------------------------- pull stuff out of query string
4796: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
4797: [$spacequalifierrest]);
4798: return $env{'form.'.$spacequalifierrest};
4799: } elsif ($realm eq 'request') {
4800: # ------------------------------------------------------------- request.browser
4801: if ($space eq 'browser') {
4802: if ($qualifier eq 'textremote') {
4803: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
4804: return 1;
4805: } else {
4806: return 0;
4807: }
4808: } else {
4809: return $env{'browser.'.$qualifier};
4810: }
4811: # ------------------------------------------------------------ request.filename
4812: } else {
4813: return $env{'request.'.$spacequalifierrest};
4814: }
4815: } elsif ($realm eq 'course') {
4816: # ---------------------------------------------------------- course.description
4817: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
4818: } elsif ($realm eq 'resource') {
4819:
4820: my ($section,$group);
4821: my @groups = ();
4822: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
4823: if (!$symbparm) { $symbparm=&symbread(); }
4824: }
4825: my ($courselevelm,$courselevel);
4826: if ($symbparm && defined($courseid) &&
4827: $courseid eq $env{'request.course.id'}) {
4828:
4829: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
4830:
4831: # ----------------------------------------------------- Cascading lookup scheme
4832: my $symbp=$symbparm;
4833: my $mapp=(&decode_symb($symbp))[0];
4834:
4835: my $symbparm=$symbp.'.'.$spacequalifierrest;
4836: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
4837:
4838: if (($env{'user.name'} eq $uname) &&
4839: ($env{'user.domain'} eq $udom)) {
4840: $section=$env{'request.course.sec'};
4841: @groups=split(/:/,$env{'request.course.groups'});
4842: if (@groups > 0) {
4843: @groups = sort(@groups);
4844: $group = $groups[0];
4845: }
4846: } else {
4847: if (! defined($usection)) {
4848: $section=&getsection($udom,$uname,$courseid);
4849: } else {
4850: $section = $usection;
4851: }
4852: my $grouplist = &get_users_groups($udom,$uname,$courseid);
4853: if ($grouplist) {
4854: @groups = split(/:/,$grouplist);
4855: @groups = sort(@groups);
4856: $group = $groups[0];
4857: }
4858: }
4859:
4860: my $grplevel=$courseid.'.['.$group.'].'.$spacequalifierrest;
4861: my $grplevelr=$courseid.'.['.$group.'].'.$symbparm;
4862: my $grplevelm=$courseid.'.['.$group.'].'.$mapparm;
4863:
4864: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
4865: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
4866: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
4867:
4868: $courselevel=$courseid.'.'.$spacequalifierrest;
4869: my $courselevelr=$courseid.'.'.$symbparm;
4870: $courselevelm=$courseid.'.'.$mapparm;
4871:
4872: # ----------------------------------------------------------- first, check user
4873:
4874: my $userreply=&resdata($uname,$udom,'user',
4875: ($courselevelr,$courselevelm,
4876: $courselevel));
4877:
4878: if (defined($userreply)) { return $userreply; }
4879:
4880: # ------------------------------------------------ second, check some of course
4881: my $coursereply;
4882: if (defined($group)) {
4883: $coursereply = &resdata($env{'course.'.$courseid.'.num'},
4884: $env{'course.'.$courseid.'.domain'},
4885: 'course',
4886: ($grplevelr,$grplevelm,$grplevel,
4887: $courselevelr));
4888: if (defined($coursereply)) { return $coursereply; }
4889: }
4890:
4891: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
4892: $env{'course.'.$courseid.'.domain'},
4893: 'course',
4894: ($seclevelr,$seclevelm,$seclevel,
4895: $courselevelr));
4896: if (defined($coursereply)) { return $coursereply; }
4897:
4898: # ------------------------------------------------------ third, check map parms
4899: my %parmhash=();
4900: my $thisparm='';
4901: if (tie(%parmhash,'GDBM_File',
4902: $env{'request.course.fn'}.'_parms.db',
4903: &GDBM_READER(),0640)) {
4904: $thisparm=$parmhash{$symbparm};
4905: untie(%parmhash);
4906: }
4907: if ($thisparm) { return $thisparm; }
4908: }
4909: # ------------------------------------------ fourth, look in resource metadata
4910:
4911: $spacequalifierrest=~s/\./\_/;
4912: my $filename;
4913: if (!$symbparm) { $symbparm=&symbread(); }
4914: if ($symbparm) {
4915: $filename=(&decode_symb($symbparm))[2];
4916: } else {
4917: $filename=$env{'request.filename'};
4918: }
4919: my $metadata=&metadata($filename,$spacequalifierrest);
4920: if (defined($metadata)) { return $metadata; }
4921: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
4922: if (defined($metadata)) { return $metadata; }
4923:
4924: # ---------------------------------------------- fourth, look in rest pf course
4925: if ($symbparm && defined($courseid) &&
4926: $courseid eq $env{'request.course.id'}) {
4927: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
4928: $env{'course.'.$courseid.'.domain'},
4929: 'course',
4930: ($courselevelm,$courselevel));
4931: if (defined($coursereply)) { return $coursereply; }
4932: }
4933: # ------------------------------------------------------------------ Cascade up
4934: unless ($space eq '0') {
4935: my @parts=split(/_/,$space);
4936: my $id=pop(@parts);
4937: my $part=join('_',@parts);
4938: if ($part eq '') { $part='0'; }
4939: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
4940: $symbparm,$udom,$uname,$section,1);
4941: if (defined($partgeneral)) { return $partgeneral; }
4942: }
4943: if ($recurse) { return undef; }
4944: my $pack_def=&packages_tab_default($filename,$varname);
4945: if (defined($pack_def)) { return $pack_def; }
4946:
4947: # ---------------------------------------------------- Any other user namespace
4948: } elsif ($realm eq 'environment') {
4949: # ----------------------------------------------------------------- environment
4950: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
4951: return $env{'environment.'.$spacequalifierrest};
4952: } else {
4953: my %returnhash=&userenvironment($udom,$uname,
4954: $spacequalifierrest);
4955: return $returnhash{$spacequalifierrest};
4956: }
4957: } elsif ($realm eq 'system') {
4958: # ----------------------------------------------------------------- system.time
4959: if ($space eq 'time') {
4960: return time;
4961: }
4962: }
4963: return '';
4964: }
4965:
4966: sub packages_tab_default {
4967: my ($uri,$varname)=@_;
4968: my (undef,$part,$name)=split(/\./,$varname);
4969: my $packages=&metadata($uri,'packages');
4970: foreach my $package (split(/,/,$packages)) {
4971: my ($pack_type,$pack_part)=split(/_/,$package,2);
4972: if (defined($packagetab{"$pack_type&$name&default"})) {
4973: return $packagetab{"$pack_type&$name&default"};
4974: }
4975: if ($pack_type eq 'part') { $pack_part='0'; }
4976: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
4977: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
4978: }
4979: }
4980: return undef;
4981: }
4982:
4983: sub add_prefix_and_part {
4984: my ($prefix,$part)=@_;
4985: my $keyroot;
4986: if (defined($prefix) && $prefix !~ /^__/) {
4987: # prefix that has a part already
4988: $keyroot=$prefix;
4989: } elsif (defined($prefix)) {
4990: # prefix that is missing a part
4991: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
4992: } else {
4993: # no prefix at all
4994: if (defined($part)) { $keyroot='_'.$part; }
4995: }
4996: return $keyroot;
4997: }
4998:
4999: # ---------------------------------------------------------------- Get metadata
5000:
5001: my %metaentry;
5002: sub metadata {
5003: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
5004: $uri=&declutter($uri);
5005: # if it is a non metadata possible uri return quickly
5006: if (($uri eq '') ||
5007: (($uri =~ m|^/*adm/|) &&
5008: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
5009: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
5010: ($uri =~ m|home/[^/]+/public_html/|)) {
5011: return undef;
5012: }
5013: my $filename=$uri;
5014: $uri=~s/\.meta$//;
5015: #
5016: # Is the metadata already cached?
5017: # Look at timestamp of caching
5018: # Everything is cached by the main uri, libraries are never directly cached
5019: #
5020: if (!defined($liburi)) {
5021: my ($result,$cached)=&is_cached_new('meta',$uri);
5022: if (defined($cached)) { return $result->{':'.$what}; }
5023: }
5024: {
5025: #
5026: # Is this a recursive call for a library?
5027: #
5028: # if (! exists($metacache{$uri})) {
5029: # $metacache{$uri}={};
5030: # }
5031: if ($liburi) {
5032: $liburi=&declutter($liburi);
5033: $filename=$liburi;
5034: } else {
5035: &devalidate_cache_new('meta',$uri);
5036: undef(%metaentry);
5037: }
5038: my %metathesekeys=();
5039: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
5040: my $metastring;
5041: if ($uri !~ m -^(uploaded|editupload)/-) {
5042: my $file=&filelocation('',&clutter($filename));
5043: #push(@{$metaentry{$uri.'.file'}},$file);
5044: $metastring=&getfile($file);
5045: }
5046: my $parser=HTML::LCParser->new(\$metastring);
5047: my $token;
5048: undef %metathesekeys;
5049: while ($token=$parser->get_token) {
5050: if ($token->[0] eq 'S') {
5051: if (defined($token->[2]->{'package'})) {
5052: #
5053: # This is a package - get package info
5054: #
5055: my $package=$token->[2]->{'package'};
5056: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5057: if (defined($token->[2]->{'id'})) {
5058: $keyroot.='_'.$token->[2]->{'id'};
5059: }
5060: if ($metaentry{':packages'}) {
5061: $metaentry{':packages'}.=','.$package.$keyroot;
5062: } else {
5063: $metaentry{':packages'}=$package.$keyroot;
5064: }
5065: foreach (sort keys %packagetab) {
5066: my $part=$keyroot;
5067: $part=~s/^\_//;
5068: if ($_=~/^\Q$package\E\&/ ||
5069: $_=~/^\Q$package\E_0\&/) {
5070: my ($pack,$name,$subp)=split(/\&/,$_);
5071: # ignore package.tab specified default values
5072: # here &package_tab_default() will fetch those
5073: if ($subp eq 'default') { next; }
5074: my $value=$packagetab{$_};
5075: my $unikey;
5076: if ($pack =~ /_0$/) {
5077: $unikey='parameter_0_'.$name;
5078: $part=0;
5079: } else {
5080: $unikey='parameter'.$keyroot.'_'.$name;
5081: }
5082: if ($subp eq 'display') {
5083: $value.=' [Part: '.$part.']';
5084: }
5085: $metaentry{':'.$unikey.'.part'}=$part;
5086: $metathesekeys{$unikey}=1;
5087: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
5088: $metaentry{':'.$unikey.'.'.$subp}=$value;
5089: }
5090: if (defined($metaentry{':'.$unikey.'.default'})) {
5091: $metaentry{':'.$unikey}=
5092: $metaentry{':'.$unikey.'.default'};
5093: }
5094: }
5095: }
5096: } else {
5097: #
5098: # This is not a package - some other kind of start tag
5099: #
5100: my $entry=$token->[1];
5101: my $unikey;
5102: if ($entry eq 'import') {
5103: $unikey='';
5104: } else {
5105: $unikey=$entry;
5106: }
5107: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5108:
5109: if (defined($token->[2]->{'id'})) {
5110: $unikey.='_'.$token->[2]->{'id'};
5111: }
5112:
5113: if ($entry eq 'import') {
5114: #
5115: # Importing a library here
5116: #
5117: if ($depthcount<20) {
5118: my $location=$parser->get_text('/import');
5119: my $dir=$filename;
5120: $dir=~s|[^/]*$||;
5121: $location=&filelocation($dir,$location);
5122: foreach (sort(split(/\,/,&metadata($uri,'keys',
5123: $location,$unikey,
5124: $depthcount+1)))) {
5125: $metaentry{':'.$_}=$metaentry{':'.$_};
5126: $metathesekeys{$_}=1;
5127: }
5128: }
5129: } else {
5130:
5131: if (defined($token->[2]->{'name'})) {
5132: $unikey.='_'.$token->[2]->{'name'};
5133: }
5134: $metathesekeys{$unikey}=1;
5135: foreach (@{$token->[3]}) {
5136: $metaentry{':'.$unikey.'.'.$_}=$token->[2]->{$_};
5137: }
5138: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
5139: my $default=$metaentry{':'.$unikey.'.default'};
5140: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
5141: # only ws inside the tag, and not in default, so use default
5142: # as value
5143: $metaentry{':'.$unikey}=$default;
5144: } else {
5145: # either something interesting inside the tag or default
5146: # uninteresting
5147: $metaentry{':'.$unikey}=$internaltext;
5148: }
5149: # end of not-a-package not-a-library import
5150: }
5151: # end of not-a-package start tag
5152: }
5153: # the next is the end of "start tag"
5154: }
5155: }
5156: my ($extension) = ($uri =~ /\.(\w+)$/);
5157: foreach my $key (sort(keys(%packagetab))) {
5158: #no specific packages #how's our extension
5159: if ($key!~/^extension_\Q$extension\E&/) { next; }
5160: &metadata_create_package_def($uri,$key,'extension_'.$extension,
5161: \%metathesekeys);
5162: }
5163: if (!exists($metaentry{':packages'})) {
5164: foreach my $key (sort(keys(%packagetab))) {
5165: #no specific packages well let's get default then
5166: if ($key!~/^default&/) { next; }
5167: &metadata_create_package_def($uri,$key,'default',
5168: \%metathesekeys);
5169: }
5170: }
5171: # are there custom rights to evaluate
5172: if ($metaentry{':copyright'} eq 'custom') {
5173:
5174: #
5175: # Importing a rights file here
5176: #
5177: unless ($depthcount) {
5178: my $location=$metaentry{':customdistributionfile'};
5179: my $dir=$filename;
5180: $dir=~s|[^/]*$||;
5181: $location=&filelocation($dir,$location);
5182: foreach (sort(split(/\,/,&metadata($uri,'keys',
5183: $location,'_rights',
5184: $depthcount+1)))) {
5185: #$metaentry{':'.$_}=$metacache{$uri}->{':'.$_};
5186: $metathesekeys{$_}=1;
5187: }
5188: }
5189: }
5190: $metaentry{':keys'}=join(',',keys %metathesekeys);
5191: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
5192: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
5193: &do_cache_new('meta',$uri,\%metaentry,60*60*24);
5194: # this is the end of "was not already recently cached
5195: }
5196: return $metaentry{':'.$what};
5197: }
5198:
5199: sub metadata_create_package_def {
5200: my ($uri,$key,$package,$metathesekeys)=@_;
5201: my ($pack,$name,$subp)=split(/\&/,$key);
5202: if ($subp eq 'default') { next; }
5203:
5204: if (defined($metaentry{':packages'})) {
5205: $metaentry{':packages'}.=','.$package;
5206: } else {
5207: $metaentry{':packages'}=$package;
5208: }
5209: my $value=$packagetab{$key};
5210: my $unikey;
5211: $unikey='parameter_0_'.$name;
5212: $metaentry{':'.$unikey.'.part'}=0;
5213: $$metathesekeys{$unikey}=1;
5214: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
5215: $metaentry{':'.$unikey.'.'.$subp}=$value;
5216: }
5217: if (defined($metaentry{':'.$unikey.'.default'})) {
5218: $metaentry{':'.$unikey}=
5219: $metaentry{':'.$unikey.'.default'};
5220: }
5221: }
5222:
5223: sub metadata_generate_part0 {
5224: my ($metadata,$metacache,$uri) = @_;
5225: my %allnames;
5226: foreach my $metakey (sort keys %$metadata) {
5227: if ($metakey=~/^parameter\_(.*)/) {
5228: my $part=$$metacache{':'.$metakey.'.part'};
5229: my $name=$$metacache{':'.$metakey.'.name'};
5230: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
5231: $allnames{$name}=$part;
5232: }
5233: }
5234: }
5235: foreach my $name (keys(%allnames)) {
5236: $$metadata{"parameter_0_$name"}=1;
5237: my $key=":parameter_0_$name";
5238: $$metacache{"$key.part"}='0';
5239: $$metacache{"$key.name"}=$name;
5240: $$metacache{"$key.type"}=$$metacache{':parameter_'.
5241: $allnames{$name}.'_'.$name.
5242: '.type'};
5243: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
5244: '.display'};
5245: my $expr='[Part: '.$allnames{$name}.']';
5246: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
5247: $$metacache{"$key.display"}=$olddis;
5248: }
5249: }
5250:
5251: # ------------------------------------------------- Get the title of a resource
5252:
5253: sub gettitle {
5254: my $urlsymb=shift;
5255: my $symb=&symbread($urlsymb);
5256: if ($symb) {
5257: my $key=$env{'request.course.id'}."\0".$symb;
5258: my ($result,$cached)=&is_cached_new('title',$key);
5259: if (defined($cached)) {
5260: return $result;
5261: }
5262: my ($map,$resid,$url)=&decode_symb($symb);
5263: my $title='';
5264: my %bighash;
5265: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5266: &GDBM_READER(),0640)) {
5267: my $mapid=$bighash{'map_pc_'.&clutter($map)};
5268: $title=$bighash{'title_'.$mapid.'.'.$resid};
5269: untie %bighash;
5270: }
5271: $title=~s/\&colon\;/\:/gs;
5272: if ($title) {
5273: return &do_cache_new('title',$key,$title,600);
5274: }
5275: $urlsymb=$url;
5276: }
5277: my $title=&metadata($urlsymb,'title');
5278: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
5279: return $title;
5280: }
5281:
5282: sub get_slot {
5283: my ($which,$cnum,$cdom)=@_;
5284: if (!$cnum || !$cdom) {
5285: (undef,my $courseid)=&Apache::lonxml::whichuser();
5286: $cdom=$env{'course.'.$courseid.'.domain'};
5287: $cnum=$env{'course.'.$courseid.'.num'};
5288: }
5289: my %slotinfo=&get('slots',[$which],$cdom,$cnum);
5290: &Apache::lonhomework::showhash(%slotinfo);
5291: my ($tmp)=keys(%slotinfo);
5292: if ($tmp=~/^error:/) { return (); }
5293: if (ref($slotinfo{$which}) eq 'HASH') {
5294: return %{$slotinfo{$which}};
5295: }
5296: return $slotinfo{$which};
5297: }
5298: # ------------------------------------------------- Update symbolic store links
5299:
5300: sub symblist {
5301: my ($mapname,%newhash)=@_;
5302: $mapname=&deversion(&declutter($mapname));
5303: my %hash;
5304: if (($env{'request.course.fn'}) && (%newhash)) {
5305: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5306: &GDBM_WRCREAT(),0640)) {
5307: foreach (keys %newhash) {
5308: $hash{declutter($_)}=&encode_symb($mapname,$newhash{$_}->[1],
5309: $newhash{$_}->[0]);
5310: }
5311: if (untie(%hash)) {
5312: return 'ok';
5313: }
5314: }
5315: }
5316: return 'error';
5317: }
5318:
5319: # --------------------------------------------------------------- Verify a symb
5320:
5321: sub symbverify {
5322: my ($symb,$thisurl)=@_;
5323: my $thisfn=$thisurl;
5324: # wrapper not part of symbs
5325: $thisfn=~s/^\/adm\/wrapper//;
5326: $thisfn=&declutter($thisfn);
5327: # direct jump to resource in page or to a sequence - will construct own symbs
5328: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
5329: # check URL part
5330: my ($map,$resid,$url)=&decode_symb($symb);
5331:
5332: unless ($url eq $thisfn) { return 0; }
5333:
5334: $symb=&symbclean($symb);
5335: $thisurl=&deversion($thisurl);
5336: $thisfn=&deversion($thisfn);
5337:
5338: my %bighash;
5339: my $okay=0;
5340:
5341: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5342: &GDBM_READER(),0640)) {
5343: my $ids=$bighash{'ids_'.&clutter($thisurl)};
5344: unless ($ids) {
5345: $ids=$bighash{'ids_/'.$thisurl};
5346: }
5347: if ($ids) {
5348: # ------------------------------------------------------------------- Has ID(s)
5349: foreach (split(/\,/,$ids)) {
5350: my ($mapid,$resid)=split(/\./,$_);
5351: if (
5352: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
5353: eq $symb) {
5354: if (($env{'request.role.adv'}) ||
5355: $bighash{'encrypted_'.$_} eq $env{'request.enc'}) {
5356: $okay=1;
5357: }
5358: }
5359: }
5360: }
5361: untie(%bighash);
5362: }
5363: return $okay;
5364: }
5365:
5366: # --------------------------------------------------------------- Clean-up symb
5367:
5368: sub symbclean {
5369: my $symb=shift;
5370: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
5371: # remove version from map
5372: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
5373:
5374: # remove version from URL
5375: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
5376:
5377: # remove wrapper
5378:
5379: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
5380: return $symb;
5381: }
5382:
5383: # ---------------------------------------------- Split symb to find map and url
5384:
5385: sub encode_symb {
5386: my ($map,$resid,$url)=@_;
5387: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
5388: }
5389:
5390: sub decode_symb {
5391: my $symb=shift;
5392: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
5393: my ($map,$resid,$url)=split(/___/,$symb);
5394: return (&fixversion($map),$resid,&fixversion($url));
5395: }
5396:
5397: sub fixversion {
5398: my $fn=shift;
5399: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
5400: my %bighash;
5401: my $uri=&clutter($fn);
5402: my $key=$env{'request.course.id'}.'_'.$uri;
5403: # is this cached?
5404: my ($result,$cached)=&is_cached_new('courseresversion',$key);
5405: if (defined($cached)) { return $result; }
5406: # unfortunately not cached, or expired
5407: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5408: &GDBM_READER(),0640)) {
5409: if ($bighash{'version_'.$uri}) {
5410: my $version=$bighash{'version_'.$uri};
5411: unless (($version eq 'mostrecent') ||
5412: ($version==&getversion($uri))) {
5413: $uri=~s/\.(\w+)$/\.$version\.$1/;
5414: }
5415: }
5416: untie %bighash;
5417: }
5418: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
5419: }
5420:
5421: sub deversion {
5422: my $url=shift;
5423: $url=~s/\.\d+\.(\w+)$/\.$1/;
5424: return $url;
5425: }
5426:
5427: # ------------------------------------------------------ Return symb list entry
5428:
5429: sub symbread {
5430: my ($thisfn,$donotrecurse)=@_;
5431: my $cache_str='request.symbread.cached.'.$thisfn;
5432: if (defined($env{$cache_str})) { return $env{$cache_str}; }
5433: # no filename provided? try from environment
5434: unless ($thisfn) {
5435: if ($env{'request.symb'}) {
5436: return $env{$cache_str}=&symbclean($env{'request.symb'});
5437: }
5438: $thisfn=$env{'request.filename'};
5439: }
5440: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
5441: # is that filename actually a symb? Verify, clean, and return
5442: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
5443: if (&symbverify($thisfn,$1)) {
5444: return $env{$cache_str}=&symbclean($thisfn);
5445: }
5446: }
5447: $thisfn=declutter($thisfn);
5448: my %hash;
5449: my %bighash;
5450: my $syval='';
5451: if (($env{'request.course.fn'}) && ($thisfn)) {
5452: my $targetfn = $thisfn;
5453: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
5454: $targetfn = 'adm/wrapper/'.$thisfn;
5455: }
5456: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
5457: $targetfn=$1;
5458: }
5459: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5460: &GDBM_READER(),0640)) {
5461: $syval=$hash{$targetfn};
5462: untie(%hash);
5463: }
5464: # ---------------------------------------------------------- There was an entry
5465: if ($syval) {
5466: #unless ($syval=~/\_\d+$/) {
5467: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
5468: #&appenv('request.ambiguous' => $thisfn);
5469: #return $env{$cache_str}='';
5470: #}
5471: #$syval.=$1;
5472: #}
5473: } else {
5474: # ------------------------------------------------------- Was not in symb table
5475: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5476: &GDBM_READER(),0640)) {
5477: # ---------------------------------------------- Get ID(s) for current resource
5478: my $ids=$bighash{'ids_'.&clutter($thisfn)};
5479: unless ($ids) {
5480: $ids=$bighash{'ids_/'.$thisfn};
5481: }
5482: unless ($ids) {
5483: # alias?
5484: $ids=$bighash{'mapalias_'.$thisfn};
5485: }
5486: if ($ids) {
5487: # ------------------------------------------------------------------- Has ID(s)
5488: my @possibilities=split(/\,/,$ids);
5489: if ($#possibilities==0) {
5490: # ----------------------------------------------- There is only one possibility
5491: my ($mapid,$resid)=split(/\./,$ids);
5492: $syval=&encode_symb($bighash{'map_id_'.$mapid},
5493: $resid,$thisfn);
5494: } elsif (!$donotrecurse) {
5495: # ------------------------------------------ There is more than one possibility
5496: my $realpossible=0;
5497: foreach (@possibilities) {
5498: my $file=$bighash{'src_'.$_};
5499: if (&allowed('bre',$file)) {
5500: my ($mapid,$resid)=split(/\./,$_);
5501: if ($bighash{'map_type_'.$mapid} ne 'page') {
5502: $realpossible++;
5503: $syval=&encode_symb($bighash{'map_id_'.$mapid},
5504: $resid,$thisfn);
5505: }
5506: }
5507: }
5508: if ($realpossible!=1) { $syval=''; }
5509: } else {
5510: $syval='';
5511: }
5512: }
5513: untie(%bighash)
5514: }
5515: }
5516: if ($syval) {
5517: return $env{$cache_str}=$syval;
5518: }
5519: }
5520: &appenv('request.ambiguous' => $thisfn);
5521: return $env{$cache_str}='';
5522: }
5523:
5524: # ---------------------------------------------------------- Return random seed
5525:
5526: sub numval {
5527: my $txt=shift;
5528: $txt=~tr/A-J/0-9/;
5529: $txt=~tr/a-j/0-9/;
5530: $txt=~tr/K-T/0-9/;
5531: $txt=~tr/k-t/0-9/;
5532: $txt=~tr/U-Z/0-5/;
5533: $txt=~tr/u-z/0-5/;
5534: $txt=~s/\D//g;
5535: if ($_64bit) { if ($txt > 2**32) { return -1; } }
5536: return int($txt);
5537: }
5538:
5539: sub numval2 {
5540: my $txt=shift;
5541: $txt=~tr/A-J/0-9/;
5542: $txt=~tr/a-j/0-9/;
5543: $txt=~tr/K-T/0-9/;
5544: $txt=~tr/k-t/0-9/;
5545: $txt=~tr/U-Z/0-5/;
5546: $txt=~tr/u-z/0-5/;
5547: $txt=~s/\D//g;
5548: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5549: my $total;
5550: foreach my $val (@txts) { $total+=$val; }
5551: if ($_64bit) { if ($total > 2**32) { return -1; } }
5552: return int($total);
5553: }
5554:
5555: sub numval3 {
5556: use integer;
5557: my $txt=shift;
5558: $txt=~tr/A-J/0-9/;
5559: $txt=~tr/a-j/0-9/;
5560: $txt=~tr/K-T/0-9/;
5561: $txt=~tr/k-t/0-9/;
5562: $txt=~tr/U-Z/0-5/;
5563: $txt=~tr/u-z/0-5/;
5564: $txt=~s/\D//g;
5565: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5566: my $total;
5567: foreach my $val (@txts) { $total+=$val; }
5568: if ($_64bit) { $total=(($total<<32)>>32); }
5569: return $total;
5570: }
5571:
5572: sub digest {
5573: my ($data)=@_;
5574: my $digest=&Digest::MD5::md5($data);
5575: my ($a,$b,$c,$d)=unpack("iiii",$digest);
5576: my ($e,$f);
5577: {
5578: use integer;
5579: $e=($a+$b);
5580: $f=($c+$d);
5581: if ($_64bit) {
5582: $e=(($e<<32)>>32);
5583: $f=(($f<<32)>>32);
5584: }
5585: }
5586: if (wantarray) {
5587: return ($e,$f);
5588: } else {
5589: my $g;
5590: {
5591: use integer;
5592: $g=($e+$f);
5593: if ($_64bit) {
5594: $g=(($g<<32)>>32);
5595: }
5596: }
5597: return $g;
5598: }
5599: }
5600:
5601: sub latest_rnd_algorithm_id {
5602: return '64bit5';
5603: }
5604:
5605: sub get_rand_alg {
5606: my ($courseid)=@_;
5607: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
5608: if ($courseid) {
5609: return $env{"course.$courseid.rndseed"};
5610: }
5611: return &latest_rnd_algorithm_id();
5612: }
5613:
5614: sub validCODE {
5615: my ($CODE)=@_;
5616: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
5617: return 0;
5618: }
5619:
5620: sub getCODE {
5621: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
5622: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
5623: defined($Apache::lonhomework::parsing_a_task) ) &&
5624: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
5625: return $Apache::lonhomework::history{'resource.CODE'};
5626: }
5627: return undef;
5628: }
5629:
5630: sub rndseed {
5631: my ($symb,$courseid,$domain,$username)=@_;
5632:
5633: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
5634: if (!$symb) {
5635: unless ($symb=$wsymb) { return time; }
5636: }
5637: if (!$courseid) { $courseid=$wcourseid; }
5638: if (!$domain) { $domain=$wdomain; }
5639: if (!$username) { $username=$wusername }
5640: my $which=&get_rand_alg();
5641: if (defined(&getCODE())) {
5642: if ($which eq '64bit5') {
5643: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
5644: } elsif ($which eq '64bit4') {
5645: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
5646: } else {
5647: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
5648: }
5649: } elsif ($which eq '64bit5') {
5650: return &rndseed_64bit5($symb,$courseid,$domain,$username);
5651: } elsif ($which eq '64bit4') {
5652: return &rndseed_64bit4($symb,$courseid,$domain,$username);
5653: } elsif ($which eq '64bit3') {
5654: return &rndseed_64bit3($symb,$courseid,$domain,$username);
5655: } elsif ($which eq '64bit2') {
5656: return &rndseed_64bit2($symb,$courseid,$domain,$username);
5657: } elsif ($which eq '64bit') {
5658: return &rndseed_64bit($symb,$courseid,$domain,$username);
5659: }
5660: return &rndseed_32bit($symb,$courseid,$domain,$username);
5661: }
5662:
5663: sub rndseed_32bit {
5664: my ($symb,$courseid,$domain,$username)=@_;
5665: {
5666: use integer;
5667: my $symbchck=unpack("%32C*",$symb) << 27;
5668: my $symbseed=numval($symb) << 22;
5669: my $namechck=unpack("%32C*",$username) << 17;
5670: my $nameseed=numval($username) << 12;
5671: my $domainseed=unpack("%32C*",$domain) << 7;
5672: my $courseseed=unpack("%32C*",$courseid);
5673: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
5674: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5675: #&Apache::lonxml::debug("rndseed :$num:$symb");
5676: if ($_64bit) { $num=(($num<<32)>>32); }
5677: return $num;
5678: }
5679: }
5680:
5681: sub rndseed_64bit {
5682: my ($symb,$courseid,$domain,$username)=@_;
5683: {
5684: use integer;
5685: my $symbchck=unpack("%32S*",$symb) << 21;
5686: my $symbseed=numval($symb) << 10;
5687: my $namechck=unpack("%32S*",$username);
5688:
5689: my $nameseed=numval($username) << 21;
5690: my $domainseed=unpack("%32S*",$domain) << 10;
5691: my $courseseed=unpack("%32S*",$courseid);
5692:
5693: my $num1=$symbchck+$symbseed+$namechck;
5694: my $num2=$nameseed+$domainseed+$courseseed;
5695: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5696: #&Apache::lonxml::debug("rndseed :$num:$symb");
5697: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5698: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5699: return "$num1,$num2";
5700: }
5701: }
5702:
5703: sub rndseed_64bit2 {
5704: my ($symb,$courseid,$domain,$username)=@_;
5705: {
5706: use integer;
5707: # strings need to be an even # of cahracters long, it it is odd the
5708: # last characters gets thrown away
5709: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5710: my $symbseed=numval($symb) << 10;
5711: my $namechck=unpack("%32S*",$username.' ');
5712:
5713: my $nameseed=numval($username) << 21;
5714: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5715: my $courseseed=unpack("%32S*",$courseid.' ');
5716:
5717: my $num1=$symbchck+$symbseed+$namechck;
5718: my $num2=$nameseed+$domainseed+$courseseed;
5719: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5720: #&Apache::lonxml::debug("rndseed :$num:$symb");
5721: return "$num1,$num2";
5722: }
5723: }
5724:
5725: sub rndseed_64bit3 {
5726: my ($symb,$courseid,$domain,$username)=@_;
5727: {
5728: use integer;
5729: # strings need to be an even # of cahracters long, it it is odd the
5730: # last characters gets thrown away
5731: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5732: my $symbseed=numval2($symb) << 10;
5733: my $namechck=unpack("%32S*",$username.' ');
5734:
5735: my $nameseed=numval2($username) << 21;
5736: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5737: my $courseseed=unpack("%32S*",$courseid.' ');
5738:
5739: my $num1=$symbchck+$symbseed+$namechck;
5740: my $num2=$nameseed+$domainseed+$courseseed;
5741: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5742: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5743: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5744:
5745: return "$num1:$num2";
5746: }
5747: }
5748:
5749: sub rndseed_64bit4 {
5750: my ($symb,$courseid,$domain,$username)=@_;
5751: {
5752: use integer;
5753: # strings need to be an even # of cahracters long, it it is odd the
5754: # last characters gets thrown away
5755: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5756: my $symbseed=numval3($symb) << 10;
5757: my $namechck=unpack("%32S*",$username.' ');
5758:
5759: my $nameseed=numval3($username) << 21;
5760: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5761: my $courseseed=unpack("%32S*",$courseid.' ');
5762:
5763: my $num1=$symbchck+$symbseed+$namechck;
5764: my $num2=$nameseed+$domainseed+$courseseed;
5765: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5766: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5767: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5768:
5769: return "$num1:$num2";
5770: }
5771: }
5772:
5773: sub rndseed_64bit5 {
5774: my ($symb,$courseid,$domain,$username)=@_;
5775: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
5776: return "$num1:$num2";
5777: }
5778:
5779: sub rndseed_CODE_64bit {
5780: my ($symb,$courseid,$domain,$username)=@_;
5781: {
5782: use integer;
5783: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5784: my $symbseed=numval2($symb);
5785: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5786: my $CODEseed=numval(&getCODE());
5787: my $courseseed=unpack("%32S*",$courseid.' ');
5788: my $num1=$symbseed+$CODEchck;
5789: my $num2=$CODEseed+$courseseed+$symbchck;
5790: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5791: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5792: if ($_64bit) { $num1=(($num1<<32)>>32); }
5793: if ($_64bit) { $num2=(($num2<<32)>>32); }
5794: return "$num1:$num2";
5795: }
5796: }
5797:
5798: sub rndseed_CODE_64bit4 {
5799: my ($symb,$courseid,$domain,$username)=@_;
5800: {
5801: use integer;
5802: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5803: my $symbseed=numval3($symb);
5804: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5805: my $CODEseed=numval3(&getCODE());
5806: my $courseseed=unpack("%32S*",$courseid.' ');
5807: my $num1=$symbseed+$CODEchck;
5808: my $num2=$CODEseed+$courseseed+$symbchck;
5809: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5810: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5811: if ($_64bit) { $num1=(($num1<<32)>>32); }
5812: if ($_64bit) { $num2=(($num2<<32)>>32); }
5813: return "$num1:$num2";
5814: }
5815: }
5816:
5817: sub rndseed_CODE_64bit5 {
5818: my ($symb,$courseid,$domain,$username)=@_;
5819: my $code = &getCODE();
5820: my ($num1,$num2)=&digest("$symb,$courseid,$code");
5821: return "$num1:$num2";
5822: }
5823:
5824: sub setup_random_from_rndseed {
5825: my ($rndseed)=@_;
5826: if ($rndseed =~/([,:])/) {
5827: my ($num1,$num2)=split(/[,:]/,$rndseed);
5828: &Math::Random::random_set_seed(abs($num1),abs($num2));
5829: } else {
5830: &Math::Random::random_set_seed_from_phrase($rndseed);
5831: }
5832: }
5833:
5834: sub latest_receipt_algorithm_id {
5835: return 'receipt2';
5836: }
5837:
5838: sub recunique {
5839: my $fucourseid=shift;
5840: my $unique;
5841: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5842: $unique=$env{"course.$fucourseid.internal.encseed"};
5843: } else {
5844: $unique=$perlvar{'lonReceipt'};
5845: }
5846: return unpack("%32C*",$unique);
5847: }
5848:
5849: sub recprefix {
5850: my $fucourseid=shift;
5851: my $prefix;
5852: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5853: $prefix=$env{"course.$fucourseid.internal.encpref"};
5854: } else {
5855: $prefix=$perlvar{'lonHostID'};
5856: }
5857: return unpack("%32C*",$prefix);
5858: }
5859:
5860: sub ireceipt {
5861: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
5862: my $cuname=unpack("%32C*",$funame);
5863: my $cudom=unpack("%32C*",$fudom);
5864: my $cucourseid=unpack("%32C*",$fucourseid);
5865: my $cusymb=unpack("%32C*",$fusymb);
5866: my $cunique=&recunique($fucourseid);
5867: my $cpart=unpack("%32S*",$part);
5868: my $return =&recprefix($fucourseid).'-';
5869: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
5870: $env{'request.state'} eq 'construct') {
5871: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
5872: " and ".($cpart%$cudom));
5873:
5874: $return.= ($cunique%$cuname+
5875: $cunique%$cudom+
5876: $cusymb%$cuname+
5877: $cusymb%$cudom+
5878: $cucourseid%$cuname+
5879: $cucourseid%$cudom+
5880: $cpart%$cuname+
5881: $cpart%$cudom);
5882: } else {
5883: $return.= ($cunique%$cuname+
5884: $cunique%$cudom+
5885: $cusymb%$cuname+
5886: $cusymb%$cudom+
5887: $cucourseid%$cuname+
5888: $cucourseid%$cudom);
5889: }
5890: return $return;
5891: }
5892:
5893: sub receipt {
5894: my ($part)=@_;
5895: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
5896: return &ireceipt($name,$domain,$courseid,$symb,$part);
5897: }
5898:
5899: # ------------------------------------------------------------ Serves up a file
5900: # returns either the contents of the file or
5901: # -1 if the file doesn't exist
5902: #
5903: # if the target is a file that was uploaded via DOCS,
5904: # a check will be made to see if a current copy exists on the local server,
5905: # if it does this will be served, otherwise a copy will be retrieved from
5906: # the home server for the course and stored in /home/httpd/html/userfiles on
5907: # the local server.
5908:
5909: sub getfile {
5910: my ($file) = @_;
5911: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
5912: &repcopy($file);
5913: return &readfile($file);
5914: }
5915:
5916: sub repcopy_userfile {
5917: my ($file)=@_;
5918: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
5919: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
5920: my ($cdom,$cnum,$filename) =
5921: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
5922: my ($info,$rtncode);
5923: my $uri="/uploaded/$cdom/$cnum/$filename";
5924: if (-e "$file") {
5925: my @fileinfo = stat($file);
5926: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
5927: if ($lwpresp ne 'ok') {
5928: if ($rtncode eq '404') {
5929: unlink($file);
5930: }
5931: #my $ua=new LWP::UserAgent;
5932: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5933: #my $response=$ua->request($request);
5934: #if ($response->is_success()) {
5935: # return $response->content;
5936: # } else {
5937: # return -1;
5938: # }
5939: return -1;
5940: }
5941: if ($info < $fileinfo[9]) {
5942: return 'ok';
5943: }
5944: $info = '';
5945: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5946: if ($lwpresp ne 'ok') {
5947: return -1;
5948: }
5949: } else {
5950: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5951: if ($lwpresp ne 'ok') {
5952: my $ua=new LWP::UserAgent;
5953: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5954: my $response=$ua->request($request);
5955: if ($response->is_success()) {
5956: $info=$response->content;
5957: } else {
5958: return -1;
5959: }
5960: }
5961: my @parts = ($cdom,$cnum);
5962: if ($filename =~ m|^(.+)/[^/]+$|) {
5963: push @parts, split(/\//,$1);
5964: }
5965: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
5966: foreach my $part (@parts) {
5967: $path .= '/'.$part;
5968: if (!-e $path) {
5969: mkdir($path,0770);
5970: }
5971: }
5972: }
5973: open(FILE,">$file");
5974: print FILE $info;
5975: close(FILE);
5976: return 'ok';
5977: }
5978:
5979: sub tokenwrapper {
5980: my $uri=shift;
5981: $uri=~s|^http\://([^/]+)||;
5982: $uri=~s|^/||;
5983: $env{'user.environment'}=~/\/([^\/]+)\.id/;
5984: my $token=$1;
5985: my (undef,$udom,$uname,$file)=split('/',$uri,4);
5986: if ($udom && $uname && $file) {
5987: $file=~s|(\?\.*)*$||;
5988: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
5989: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
5990: (($uri=~/\?/)?'&':'?').'token='.$token.
5991: '&tokenissued='.$perlvar{'lonHostID'};
5992: } else {
5993: return '/adm/notfound.html';
5994: }
5995: }
5996:
5997: sub getuploaded {
5998: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
5999: $uri=~s/^\///;
6000: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
6001: my $ua=new LWP::UserAgent;
6002: my $request=new HTTP::Request($reqtype,$uri);
6003: my $response=$ua->request($request);
6004: $$rtncode = $response->code;
6005: if (! $response->is_success()) {
6006: return 'failed';
6007: }
6008: if ($reqtype eq 'HEAD') {
6009: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
6010: } elsif ($reqtype eq 'GET') {
6011: $$info = $response->content;
6012: }
6013: return 'ok';
6014: }
6015:
6016: sub readfile {
6017: my $file = shift;
6018: if ( (! -e $file ) || ($file eq '') ) { return -1; };
6019: my $fh;
6020: open($fh,"<$file");
6021: my $a='';
6022: while (<$fh>) { $a .=$_; }
6023: return $a;
6024: }
6025:
6026: sub filelocation {
6027: my ($dir,$file) = @_;
6028: my $location;
6029: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
6030: if ($file=~m:^/~:) { # is a contruction space reference
6031: $location = $file;
6032: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
6033: } elsif ($file=~m:^/home/[^/]*/public_html/:) {
6034: # is a correct contruction space reference
6035: $location = $file;
6036: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
6037: my ($udom,$uname,$filename)=
6038: ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
6039: my $home=&homeserver($uname,$udom);
6040: my $is_me=0;
6041: my @ids=¤t_machine_ids();
6042: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
6043: if ($is_me) {
6044: $location=&Apache::loncommon::propath($udom,$uname).
6045: '/userfiles/'.$filename;
6046: } else {
6047: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
6048: $udom.'/'.$uname.'/'.$filename;
6049: }
6050: } else {
6051: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
6052: $file=~s:^/res/:/:;
6053: if ( !( $file =~ m:^/:) ) {
6054: $location = $dir. '/'.$file;
6055: } else {
6056: $location = '/home/httpd/html/res'.$file;
6057: }
6058: }
6059: $location=~s://+:/:g; # remove duplicate /
6060: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
6061: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
6062: return $location;
6063: }
6064:
6065: sub hreflocation {
6066: my ($dir,$file)=@_;
6067: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
6068: $file=filelocation($dir,$file);
6069: }
6070: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
6071: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
6072: } elsif ($file=~m-/home/(\w+)/public_html/-) {
6073: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
6074: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
6075: $file=~s-^/home/httpd/lonUsers/([^/]*)/./././([^/]*)/userfiles/
6076: -/uploaded/$1/$2/-x;
6077: }
6078: return $file;
6079: }
6080:
6081: sub current_machine_domains {
6082: my $hostname=$hostname{$perlvar{'lonHostID'}};
6083: my @domains;
6084: while( my($id, $name) = each(%hostname)) {
6085: # &logthis("-$id-$name-$hostname-");
6086: if ($hostname eq $name) {
6087: push(@domains,$hostdom{$id});
6088: }
6089: }
6090: return @domains;
6091: }
6092:
6093: sub current_machine_ids {
6094: my $hostname=$hostname{$perlvar{'lonHostID'}};
6095: my @ids;
6096: while( my($id, $name) = each(%hostname)) {
6097: # &logthis("-$id-$name-$hostname-");
6098: if ($hostname eq $name) {
6099: push(@ids,$id);
6100: }
6101: }
6102: return @ids;
6103: }
6104:
6105: # ------------------------------------------------------------- Declutters URLs
6106:
6107: sub declutter {
6108: my $thisfn=shift;
6109: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
6110: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
6111: $thisfn=~s/^\///;
6112: $thisfn=~s/^res\///;
6113: $thisfn=~s/\?.+$//;
6114: return $thisfn;
6115: }
6116:
6117: # ------------------------------------------------------------- Clutter up URLs
6118:
6119: sub clutter {
6120: my $thisfn='/'.&declutter(shift);
6121: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
6122: $thisfn='/res'.$thisfn;
6123: }
6124: return $thisfn;
6125: }
6126:
6127: sub freeze_escape {
6128: my ($value)=@_;
6129: if (ref($value)) {
6130: $value=&nfreeze($value);
6131: return '__FROZEN__'.&escape($value);
6132: }
6133: return &escape($value);
6134: }
6135:
6136: # -------------------------------------------------------- Escape Special Chars
6137:
6138: sub escape {
6139: my $str=shift;
6140: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
6141: return $str;
6142: }
6143:
6144: # ----------------------------------------------------- Un-Escape Special Chars
6145:
6146: sub unescape {
6147: my $str=shift;
6148: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
6149: return $str;
6150: }
6151:
6152: sub thaw_unescape {
6153: my ($value)=@_;
6154: if ($value =~ /^__FROZEN__/) {
6155: substr($value,0,10,undef);
6156: $value=&unescape($value);
6157: return &thaw($value);
6158: }
6159: return &unescape($value);
6160: }
6161:
6162: sub correct_line_ends {
6163: my ($result)=@_;
6164: $$result =~s/\r\n/\n/mg;
6165: $$result =~s/\r/\n/mg;
6166: }
6167: # ================================================================ Main Program
6168:
6169: sub goodbye {
6170: &logthis("Starting Shut down");
6171: #not converted to using infrastruture and probably shouldn't be
6172: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
6173: #converted
6174: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
6175: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
6176: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
6177: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
6178: #1.1 only
6179: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
6180: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
6181: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
6182: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
6183: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
6184: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
6185: &logthis(sprintf("%-20s is %s",'hits',$hits));
6186: &flushcourselogs();
6187: &logthis("Shutting down");
6188: return DONE;
6189: }
6190:
6191: BEGIN {
6192: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
6193: unless ($readit) {
6194: {
6195: # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
6196: open(my $config,"</etc/httpd/conf/loncapa.conf");
6197:
6198: while (my $configline=<$config>) {
6199: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
6200: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
6201: chomp($varvalue);
6202: $perlvar{$varname}=$varvalue;
6203: }
6204: }
6205: close($config);
6206: }
6207: {
6208: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
6209:
6210: while (my $configline=<$config>) {
6211: if ($configline =~ /^[^\#]*PerlSetVar/) {
6212: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
6213: chomp($varvalue);
6214: $perlvar{$varname}=$varvalue;
6215: }
6216: }
6217: close($config);
6218: }
6219:
6220: # ------------------------------------------------------------ Read domain file
6221: {
6222: %domaindescription = ();
6223: %domain_auth_def = ();
6224: %domain_auth_arg_def = ();
6225: my $fh;
6226: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
6227: while (<$fh>) {
6228: next if (/^(\#|\s*$)/);
6229: # next if /^\#/;
6230: chomp;
6231: my ($domain, $domain_description, $def_auth, $def_auth_arg,
6232: $def_lang, $city, $longi, $lati, $primary) = split(/:/,$_);
6233: $domain_auth_def{$domain}=$def_auth;
6234: $domain_auth_arg_def{$domain}=$def_auth_arg;
6235: $domaindescription{$domain}=$domain_description;
6236: $domain_lang_def{$domain}=$def_lang;
6237: $domain_city{$domain}=$city;
6238: $domain_longi{$domain}=$longi;
6239: $domain_lati{$domain}=$lati;
6240: $domain_primary{$domain}=$primary;
6241:
6242: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
6243: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
6244: }
6245: }
6246: close ($fh);
6247: }
6248:
6249:
6250: # ------------------------------------------------------------- Read hosts file
6251: {
6252: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
6253:
6254: while (my $configline=<$config>) {
6255: next if ($configline =~ /^(\#|\s*$)/);
6256: chomp($configline);
6257: my ($id,$domain,$role,$name)=split(/:/,$configline);
6258: $name=~s/\s//g;
6259: if ($id && $domain && $role && $name) {
6260: $hostname{$id}=$name;
6261: $hostdom{$id}=$domain;
6262: if ($role eq 'library') { $libserv{$id}=$name; }
6263: }
6264: }
6265: close($config);
6266: # FIXME: dev server don't want this, production servers _do_ want this
6267: #&get_iphost();
6268: }
6269:
6270: sub get_iphost {
6271: if (%iphost) { return %iphost; }
6272: my %name_to_ip;
6273: foreach my $id (keys(%hostname)) {
6274: my $name=$hostname{$id};
6275: my $ip;
6276: if (!exists($name_to_ip{$name})) {
6277: $ip = gethostbyname($name);
6278: if (!$ip || length($ip) ne 4) {
6279: &logthis("Skipping host $id name $name no IP found\n");
6280: next;
6281: }
6282: $ip=inet_ntoa($ip);
6283: $name_to_ip{$name} = $ip;
6284: } else {
6285: $ip = $name_to_ip{$name};
6286: }
6287: push(@{$iphost{$ip}},$id);
6288: }
6289: return %iphost;
6290: }
6291:
6292: # ------------------------------------------------------ Read spare server file
6293: {
6294: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
6295:
6296: while (my $configline=<$config>) {
6297: chomp($configline);
6298: if ($configline) {
6299: $spareid{$configline}=1;
6300: }
6301: }
6302: close($config);
6303: }
6304: # ------------------------------------------------------------ Read permissions
6305: {
6306: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
6307:
6308: while (my $configline=<$config>) {
6309: chomp($configline);
6310: if ($configline) {
6311: my ($role,$perm)=split(/ /,$configline);
6312: if ($perm ne '') { $pr{$role}=$perm; }
6313: }
6314: }
6315: close($config);
6316: }
6317:
6318: # -------------------------------------------- Read plain texts for permissions
6319: {
6320: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
6321:
6322: while (my $configline=<$config>) {
6323: chomp($configline);
6324: if ($configline) {
6325: my ($short,$plain)=split(/:/,$configline);
6326: if ($plain ne '') { $prp{$short}=$plain; }
6327: }
6328: }
6329: close($config);
6330: }
6331:
6332: # ---------------------------------------------------------- Read package table
6333: {
6334: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
6335:
6336: while (my $configline=<$config>) {
6337: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
6338: chomp($configline);
6339: my ($short,$plain)=split(/:/,$configline);
6340: my ($pack,$name)=split(/\&/,$short);
6341: if ($plain ne '') {
6342: $packagetab{$pack.'&'.$name.'&name'}=$name;
6343: $packagetab{$short}=$plain;
6344: }
6345: }
6346: close($config);
6347: }
6348:
6349: # ------------- set up temporary directory
6350: {
6351: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
6352:
6353: }
6354:
6355: $memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
6356:
6357: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
6358: $dumpcount=0;
6359:
6360: &logtouch();
6361: &logthis('<font color="yellow">INFO: Read configuration</font>');
6362: $readit=1;
6363: {
6364: use integer;
6365: my $test=(2**32)+1;
6366: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
6367: &logthis(" Detected 64bit platform ($_64bit)");
6368: }
6369: }
6370: }
6371:
6372: 1;
6373: __END__
6374:
6375: =pod
6376:
6377: =head1 NAME
6378:
6379: Apache::lonnet - Subroutines to ask questions about things in the network.
6380:
6381: =head1 SYNOPSIS
6382:
6383: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
6384:
6385: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
6386:
6387: Common parameters:
6388:
6389: =over 4
6390:
6391: =item *
6392:
6393: $uname : an internal username (if $cname expecting a course Id specifically)
6394:
6395: =item *
6396:
6397: $udom : a domain (if $cdom expecting a course's domain specifically)
6398:
6399: =item *
6400:
6401: $symb : a resource instance identifier
6402:
6403: =item *
6404:
6405: $namespace : the name of a .db file that contains the data needed or
6406: being set.
6407:
6408: =back
6409:
6410: =head1 OVERVIEW
6411:
6412: lonnet provides subroutines which interact with the
6413: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
6414: about classes, users, and resources.
6415:
6416: For many of these objects you can also use this to store data about
6417: them or modify them in various ways.
6418:
6419: =head2 Symbs
6420:
6421: To identify a specific instance of a resource, LON-CAPA uses symbols
6422: or "symbs"X<symb>. These identifiers are built from the URL of the
6423: map, the resource number of the resource in the map, and the URL of
6424: the resource itself. The latter is somewhat redundant, but might help
6425: if maps change.
6426:
6427: An example is
6428:
6429: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
6430:
6431: The respective map entry is
6432:
6433: <resource id="19" src="/res/msu/korte/tests/part12.problem"
6434: title="Problem 2">
6435: </resource>
6436:
6437: Symbs are used by the random number generator, as well as to store and
6438: restore data specific to a certain instance of for example a problem.
6439:
6440: =head2 Storing And Retrieving Data
6441:
6442: X<store()>X<cstore()>X<restore()>Three of the most important functions
6443: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
6444: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
6445: is is the non-critical message twin of cstore. These functions are for
6446: handlers to store a perl hash to a user's permanent data space in an
6447: easy manner, and to retrieve it again on another call. It is expected
6448: that a handler would use this once at the beginning to retrieve data,
6449: and then again once at the end to send only the new data back.
6450:
6451: The data is stored in the user's data directory on the user's
6452: homeserver under the ID of the course.
6453:
6454: The hash that is returned by restore will have all of the previous
6455: value for all of the elements of the hash.
6456:
6457: Example:
6458:
6459: #creating a hash
6460: my %hash;
6461: $hash{'foo'}='bar';
6462:
6463: #storing it
6464: &Apache::lonnet::cstore(\%hash);
6465:
6466: #changing a value
6467: $hash{'foo'}='notbar';
6468:
6469: #adding a new value
6470: $hash{'bar'}='foo';
6471: &Apache::lonnet::cstore(\%hash);
6472:
6473: #retrieving the hash
6474: my %history=&Apache::lonnet::restore();
6475:
6476: #print the hash
6477: foreach my $key (sort(keys(%history))) {
6478: print("\%history{$key} = $history{$key}");
6479: }
6480:
6481: Will print out:
6482:
6483: %history{1:foo} = bar
6484: %history{1:keys} = foo:timestamp
6485: %history{1:timestamp} = 990455579
6486: %history{2:bar} = foo
6487: %history{2:foo} = notbar
6488: %history{2:keys} = foo:bar:timestamp
6489: %history{2:timestamp} = 990455580
6490: %history{bar} = foo
6491: %history{foo} = notbar
6492: %history{timestamp} = 990455580
6493: %history{version} = 2
6494:
6495: Note that the special hash entries C<keys>, C<version> and
6496: C<timestamp> were added to the hash. C<version> will be equal to the
6497: total number of versions of the data that have been stored. The
6498: C<timestamp> attribute will be the UNIX time the hash was
6499: stored. C<keys> is available in every historical section to list which
6500: keys were added or changed at a specific historical revision of a
6501: hash.
6502:
6503: B<Warning>: do not store the hash that restore returns directly. This
6504: will cause a mess since it will restore the historical keys as if the
6505: were new keys. I.E. 1:foo will become 1:1:foo etc.
6506:
6507: Calling convention:
6508:
6509: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
6510: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
6511:
6512: For more detailed information, see lonnet specific documentation.
6513:
6514: =head1 RETURN MESSAGES
6515:
6516: =over 4
6517:
6518: =item * B<con_lost>: unable to contact remote host
6519:
6520: =item * B<con_delayed>: unable to contact remote host, message will be delivered
6521: when the connection is brought back up
6522:
6523: =item * B<con_failed>: unable to contact remote host and unable to save message
6524: for later delivery
6525:
6526: =item * B<error:>: an error a occured, a description of the error follows the :
6527:
6528: =item * B<no_such_host>: unable to fund a host associated with the user/domain
6529: that was requested
6530:
6531: =back
6532:
6533: =head1 PUBLIC SUBROUTINES
6534:
6535: =head2 Session Environment Functions
6536:
6537: =over 4
6538:
6539: =item *
6540: X<appenv()>
6541: B<appenv(%hash)>: the value of %hash is written to
6542: the user envirnoment file, and will be restored for each access this
6543: user makes during this session, also modifies the %env for the current
6544: process
6545:
6546: =item *
6547: X<delenv()>
6548: B<delenv($regexp)>: removes all items from the session
6549: environment file that matches the regular expression in $regexp. The
6550: values are also delted from the current processes %env.
6551:
6552: =back
6553:
6554: =head2 User Information
6555:
6556: =over 4
6557:
6558: =item *
6559: X<queryauthenticate()>
6560: B<queryauthenticate($uname,$udom)>: try to determine user's current
6561: authentication scheme
6562:
6563: =item *
6564: X<authenticate()>
6565: B<authenticate($uname,$upass,$udom)>: try to
6566: authenticate user from domain's lib servers (first use the current
6567: one). C<$upass> should be the users password.
6568:
6569: =item *
6570: X<homeserver()>
6571: B<homeserver($uname,$udom)>: find the server which has
6572: the user's directory and files (there must be only one), this caches
6573: the answer, and also caches if there is a borken connection.
6574:
6575: =item *
6576: X<idget()>
6577: B<idget($udom,@ids)>: find the usernames behind a list of IDs
6578: (IDs are a unique resource in a domain, there must be only 1 ID per
6579: username, and only 1 username per ID in a specific domain) (returns
6580: hash: id=>name,id=>name)
6581:
6582: =item *
6583: X<idrget()>
6584: B<idrget($udom,@unames)>: find the IDs behind a list of
6585: usernames (returns hash: name=>id,name=>id)
6586:
6587: =item *
6588: X<idput()>
6589: B<idput($udom,%ids)>: store away a list of names and associated IDs
6590:
6591: =item *
6592: X<rolesinit()>
6593: B<rolesinit($udom,$username,$authhost)>: get user privileges
6594:
6595: =item *
6596: X<getsection()>
6597: B<getsection($udom,$uname,$cname)>: finds the section of student in the
6598: course $cname, return section name/number or '' for "not in course"
6599: and '-1' for "no section"
6600:
6601: =item *
6602: X<userenvironment()>
6603: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
6604: passed in @what from the requested user's environment, returns a hash
6605:
6606: =back
6607:
6608: =head2 User Roles
6609:
6610: =over 4
6611:
6612: =item *
6613:
6614: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
6615: actions
6616: F: full access
6617: U,I,K: authentication modes (cxx only)
6618: '': forbidden
6619: 1: user needs to choose course
6620: 2: browse allowed
6621:
6622: =item *
6623:
6624: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
6625: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
6626: and course level
6627:
6628: =item *
6629:
6630: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
6631: explanation of a user role term
6632:
6633: =back
6634:
6635: =head2 User Modification
6636:
6637: =over 4
6638:
6639: =item *
6640:
6641: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
6642: user for the level given by URL. Optional start and end dates (leave empty
6643: string or zero for "no date")
6644:
6645: =item *
6646:
6647: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
6648: change a users, password, possible return values are: ok,
6649: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
6650: refused
6651:
6652: =item *
6653:
6654: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
6655:
6656: =item *
6657:
6658: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
6659: modify user
6660:
6661: =item *
6662:
6663: modifystudent
6664:
6665: modify a students enrollment and identification information.
6666: The course id is resolved based on the current users environment.
6667: This means the envoking user must be a course coordinator or otherwise
6668: associated with a course.
6669:
6670: This call is essentially a wrapper for lonnet::modifyuser and
6671: lonnet::modify_student_enrollment
6672:
6673: Inputs:
6674:
6675: =over 4
6676:
6677: =item B<$udom> Students loncapa domain
6678:
6679: =item B<$uname> Students loncapa login name
6680:
6681: =item B<$uid> Students id/student number
6682:
6683: =item B<$umode> Students authentication mode
6684:
6685: =item B<$upass> Students password
6686:
6687: =item B<$first> Students first name
6688:
6689: =item B<$middle> Students middle name
6690:
6691: =item B<$last> Students last name
6692:
6693: =item B<$gene> Students generation
6694:
6695: =item B<$usec> Students section in course
6696:
6697: =item B<$end> Unix time of the roles expiration
6698:
6699: =item B<$start> Unix time of the roles start date
6700:
6701: =item B<$forceid> If defined, allow $uid to be changed
6702:
6703: =item B<$desiredhome> server to use as home server for student
6704:
6705: =back
6706:
6707: =item *
6708:
6709: modify_student_enrollment
6710:
6711: Change a students enrollment status in a class. The environment variable
6712: 'role.request.course' must be defined for this function to proceed.
6713:
6714: Inputs:
6715:
6716: =over 4
6717:
6718: =item $udom, students domain
6719:
6720: =item $uname, students name
6721:
6722: =item $uid, students user id
6723:
6724: =item $first, students first name
6725:
6726: =item $middle
6727:
6728: =item $last
6729:
6730: =item $gene
6731:
6732: =item $usec
6733:
6734: =item $end
6735:
6736: =item $start
6737:
6738: =back
6739:
6740:
6741: =item *
6742:
6743: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
6744: custom role; give a custom role to a user for the level given by URL. Specify
6745: name and domain of role author, and role name
6746:
6747: =item *
6748:
6749: revokerole($udom,$uname,$url,$role) : revoke a role for url
6750:
6751: =item *
6752:
6753: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
6754:
6755: =back
6756:
6757: =head2 Course Infomation
6758:
6759: =over 4
6760:
6761: =item *
6762:
6763: coursedescription($courseid) : returns a hash of information about the
6764: specified course id, including all environment settings for the
6765: course, the description of the course will be in the hash under the
6766: key 'description'
6767:
6768: =item *
6769:
6770: resdata($name,$domain,$type,@which) : request for current parameter
6771: setting for a specific $type, where $type is either 'course' or 'user',
6772: @what should be a list of parameters to ask about. This routine caches
6773: answers for 5 minutes.
6774:
6775: =back
6776:
6777: =head2 Course Modification
6778:
6779: =over 4
6780:
6781: =item *
6782:
6783: writecoursepref($courseid,%prefs) : write preferences (environment
6784: database) for a course
6785:
6786: =item *
6787:
6788: createcourse($udom,$description,$url) : make/modify course
6789:
6790: =back
6791:
6792: =head2 Resource Subroutines
6793:
6794: =over 4
6795:
6796: =item *
6797:
6798: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
6799:
6800: =item *
6801:
6802: repcopy($filename) : subscribes to the requested file, and attempts to
6803: replicate from the owning library server, Might return
6804: 'unavailable', 'not_found', 'forbidden', 'ok', or
6805: 'bad_request', also attempts to grab the metadata for the
6806: resource. Expects the local filesystem pathname
6807: (/home/httpd/html/res/....)
6808:
6809: =back
6810:
6811: =head2 Resource Information
6812:
6813: =over 4
6814:
6815: =item *
6816:
6817: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
6818: a vairety of different possible values, $varname should be a request
6819: string, and the other parameters can be used to specify who and what
6820: one is asking about.
6821:
6822: Possible values for $varname are environment.lastname (or other item
6823: from the envirnment hash), user.name (or someother aspect about the
6824: user), resource.0.maxtries (or some other part and parameter of a
6825: resource)
6826:
6827: =item *
6828:
6829: directcondval($number) : get current value of a condition; reads from a state
6830: string
6831:
6832: =item *
6833:
6834: condval($condidx) : value of condition index based on state
6835:
6836: =item *
6837:
6838: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
6839: resource's metadata, $what should be either a specific key, or either
6840: 'keys' (to get a list of possible keys) or 'packages' to get a list of
6841: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
6842:
6843: this function automatically caches all requests
6844:
6845: =item *
6846:
6847: metadata_query($query,$custom,$customshow) : make a metadata query against the
6848: network of library servers; returns file handle of where SQL and regex results
6849: will be stored for query
6850:
6851: =item *
6852:
6853: symbread($filename) : return symbolic list entry (filename argument optional);
6854: returns the data handle
6855:
6856: =item *
6857:
6858: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
6859: a possible symb for the URL in $thisfn, and if is an encryypted
6860: resource that the user accessed using /enc/ returns a 1 on success, 0
6861: on failure, user must be in a course, as it assumes the existance of
6862: the course initial hash, and uses $env('request.course.id'}
6863:
6864:
6865: =item *
6866:
6867: symbclean($symb) : removes versions numbers from a symb, returns the
6868: cleaned symb
6869:
6870: =item *
6871:
6872: is_on_map($uri) : checks if the $uri is somewhere on the current
6873: course map, user must be in a course for it to work.
6874:
6875: =item *
6876:
6877: numval($salt) : return random seed value (addend for rndseed)
6878:
6879: =item *
6880:
6881: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
6882: a random seed, all arguments are optional, if they aren't sent it uses the
6883: environment to derive them. Note: if symb isn't sent and it can't get one
6884: from &symbread it will use the current time as its return value
6885:
6886: =item *
6887:
6888: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
6889: unfakeable, receipt
6890:
6891: =item *
6892:
6893: receipt() : API to ireceipt working off of env values; given out to users
6894:
6895: =item *
6896:
6897: countacc($url) : count the number of accesses to a given URL
6898:
6899: =item *
6900:
6901: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
6902:
6903: =item *
6904:
6905: checkin($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 $tcrsid)
6906:
6907: =item *
6908:
6909: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
6910:
6911: =item *
6912:
6913: devalidate($symb) : devalidate temporary spreadsheet calculations,
6914: forcing spreadsheet to reevaluate the resource scores next time.
6915:
6916: =back
6917:
6918: =head2 Storing/Retreiving Data
6919:
6920: =over 4
6921:
6922: =item *
6923:
6924: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
6925: for this url; hashref needs to be given and should be a \%hashname; the
6926: remaining args aren't required and if they aren't passed or are '' they will
6927: be derived from the env
6928:
6929: =item *
6930:
6931: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
6932: uses critical subroutine
6933:
6934: =item *
6935:
6936: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
6937: all args are optional
6938:
6939: =item *
6940:
6941: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
6942: works very similar to store/cstore, but all data is stored in a
6943: temporary location and can be reset using tmpreset, $storehash should
6944: be a hash reference, returns nothing on success
6945:
6946: =item *
6947:
6948: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
6949: similar to restore, but all data is stored in a temporary location and
6950: can be reset using tmpreset. Returns a hash of values on success,
6951: error string otherwise.
6952:
6953: =item *
6954:
6955: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
6956: deltes all keys for $symb form the temporary storage hash.
6957:
6958: =item *
6959:
6960: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6961: reference filled in from namesp ($udom and $uname are optional)
6962:
6963: =item *
6964:
6965: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
6966: namesp ($udom and $uname are optional)
6967:
6968: =item *
6969:
6970: dump($namespace,$udom,$uname,$regexp) :
6971: dumps the complete (or key matching regexp) namespace into a hash
6972: ($udom, $uname and $regexp are optional)
6973:
6974: =item *
6975:
6976: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
6977: $store can be a scalar, an array reference, or if the amount to be
6978: incremented is > 1, a hash reference.
6979:
6980: ($udom and $uname are optional)
6981:
6982: =item *
6983:
6984: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
6985: ($udom and $uname are optional)
6986:
6987: =item *
6988:
6989: putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
6990: keys used in storehash include version information (e.g., 1:$symb:message etc.) as
6991: used in records written by &store and retrieved by &restore. This function
6992: was created for use in editing discussion posts, without incrementing the
6993: version number included in the key for a particular post. The colon
6994: separated list of attribute names (e.g., the value associated with the key
6995: 1:keys:$symb) is also generated and passed in the ampersand separated
6996: items sent to lonnet::reply().
6997:
6998: =item *
6999:
7000: cput($namespace,$storehash,$udom,$uname) : critical put
7001: ($udom and $uname are optional)
7002:
7003: =item *
7004:
7005: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7006: reference filled in from namesp (encrypts the return communication)
7007: ($udom and $uname are optional)
7008:
7009: =item *
7010:
7011: log($udom,$name,$home,$message) : write to permanent log for user; use
7012: critical subroutine
7013:
7014: =back
7015:
7016: =head2 Network Status Functions
7017:
7018: =over 4
7019:
7020: =item *
7021:
7022: dirlist($uri) : return directory list based on URI
7023:
7024: =item *
7025:
7026: spareserver() : find server with least workload from spare.tab
7027:
7028: =back
7029:
7030: =head2 Apache Request
7031:
7032: =over 4
7033:
7034: =item *
7035:
7036: ssi($url,%hash) : server side include, does a complete request cycle on url to
7037: localhost, posts hash
7038:
7039: =back
7040:
7041: =head2 Data to String to Data
7042:
7043: =over 4
7044:
7045: =item *
7046:
7047: hash2str(%hash) : convert a hash into a string complete with escaping and '='
7048: and '&' separators, supports elements that are arrayrefs and hashrefs
7049:
7050: =item *
7051:
7052: hashref2str($hashref) : convert a hashref into a string complete with
7053: escaping and '=' and '&' separators, supports elements that are
7054: arrayrefs and hashrefs
7055:
7056: =item *
7057:
7058: arrayref2str($arrayref) : convert an arrayref into a string complete
7059: with escaping and '&' separators, supports elements that are arrayrefs
7060: and hashrefs
7061:
7062: =item *
7063:
7064: str2hash($string) : convert string to hash using unescaping and
7065: splitting on '=' and '&', supports elements that are arrayrefs and
7066: hashrefs
7067:
7068: =item *
7069:
7070: str2array($string) : convert string to hash using unescaping and
7071: splitting on '&', supports elements that are arrayrefs and hashrefs
7072:
7073: =back
7074:
7075: =head2 Logging Routines
7076:
7077: =over 4
7078:
7079: These routines allow one to make log messages in the lonnet.log and
7080: lonnet.perm logfiles.
7081:
7082: =item *
7083:
7084: logtouch() : make sure the logfile, lonnet.log, exists
7085:
7086: =item *
7087:
7088: logthis() : append message to the normal lonnet.log file, it gets
7089: preiodically rolled over and deleted.
7090:
7091: =item *
7092:
7093: logperm() : append a permanent message to lonnet.perm.log, this log
7094: file never gets deleted by any automated portion of the system, only
7095: messages of critical importance should go in here.
7096:
7097: =back
7098:
7099: =head2 General File Helper Routines
7100:
7101: =over 4
7102:
7103: =item *
7104:
7105: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
7106: (a) files in /uploaded
7107: (i) If a local copy of the file exists -
7108: compares modification date of local copy with last-modified date for
7109: definitive version stored on home server for course. If local copy is
7110: stale, requests a new version from the home server and stores it.
7111: If the original has been removed from the home server, then local copy
7112: is unlinked.
7113: (ii) If local copy does not exist -
7114: requests the file from the home server and stores it.
7115:
7116: If $caller is 'uploadrep':
7117: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
7118: for request for files originally uploaded via DOCS.
7119: - returns 'ok' if fresh local copy now available, -1 otherwise.
7120:
7121: Otherwise:
7122: This indicates a call from the content generation phase of the request.
7123: - returns the entire contents of the file or -1.
7124:
7125: (b) files in /res
7126: - returns the entire contents of a file or -1;
7127: it properly subscribes to and replicates the file if neccessary.
7128:
7129: =item *
7130:
7131: filelocation($dir,$file) : returns file system location of a file
7132: based on URI; meant to be "fairly clean" absolute reference, $dir is a
7133: directory that relative $file lookups are to looked in ($dir of /a/dir
7134: and a file of ../bob will become /a/bob)
7135:
7136: =item *
7137:
7138: hreflocation($dir,$file) : returns file system location or a URL; same as
7139: filelocation except for hrefs
7140:
7141: =item *
7142:
7143: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
7144:
7145: =back
7146:
7147: =head2 Usererfile file routines (/uploaded*)
7148:
7149: =over 4
7150:
7151: =item *
7152:
7153: userfileupload(): main rotine for putting a file in a user or course's
7154: filespace, arguments are,
7155:
7156: formname - required - this is the name of the element in $env where the
7157: filename, and the contents of the file to create/modifed exist
7158: the filename is in $env{'form.'.$formname.'.filename'} and the
7159: contents of the file is located in $env{'form.'.$formname}
7160: coursedoc - if true, store the file in the course of the active role
7161: of the current user
7162: subdir - required - subdirectory to put the file in under ../userfiles/
7163: if undefined, it will be placed in "unknown"
7164:
7165: (This routine calls clean_filename() to remove any dangerous
7166: characters from the filename, and then calls finuserfileupload() to
7167: complete the transaction)
7168:
7169: returns either the url of the uploaded file (/uploaded/....) if successful
7170: and /adm/notfound.html if unsuccessful
7171:
7172: =item *
7173:
7174: clean_filename(): routine for cleaing a filename up for storage in
7175: userfile space, argument is:
7176:
7177: filename - proposed filename
7178:
7179: returns: the new clean filename
7180:
7181: =item *
7182:
7183: finishuserfileupload(): routine that creaes and sends the file to
7184: userspace, probably shouldn't be called directly
7185:
7186: docuname: username or courseid of destination for the file
7187: docudom: domain of user/course of destination for the file
7188: formname: same as for userfileupload()
7189: fname: filename (inculding subdirectories) for the file
7190:
7191: returns either the url of the uploaded file (/uploaded/....) if successful
7192: and /adm/notfound.html if unsuccessful
7193:
7194: =item *
7195:
7196: renameuserfile(): renames an existing userfile to a new name
7197:
7198: Args:
7199: docuname: username or courseid of destination for the file
7200: docudom: domain of user/course of destination for the file
7201: old: current file name (including any subdirs under userfiles)
7202: new: desired file name (including any subdirs under userfiles)
7203:
7204: =item *
7205:
7206: mkdiruserfile(): creates a directory is a userfiles dir
7207:
7208: Args:
7209: docuname: username or courseid of destination for the file
7210: docudom: domain of user/course of destination for the file
7211: dir: dir to create (including any subdirs under userfiles)
7212:
7213: =item *
7214:
7215: removeuserfile(): removes a file that exists in userfiles
7216:
7217: Args:
7218: docuname: username or courseid of destination for the file
7219: docudom: domain of user/course of destination for the file
7220: fname: filname to delete (including any subdirs under userfiles)
7221:
7222: =item *
7223:
7224: removeuploadedurl(): convience function for removeuserfile()
7225:
7226: Args:
7227: url: a full /uploaded/... url to delete
7228:
7229: =back
7230:
7231: =head2 HTTP Helper Routines
7232:
7233: =over 4
7234:
7235: =item *
7236:
7237: escape() : unpack non-word characters into CGI-compatible hex codes
7238:
7239: =item *
7240:
7241: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
7242:
7243: =back
7244:
7245: =head1 PRIVATE SUBROUTINES
7246:
7247: =head2 Underlying communication routines (Shouldn't call)
7248:
7249: =over 4
7250:
7251: =item *
7252:
7253: subreply() : tries to pass a message to lonc, returns con_lost if incapable
7254:
7255: =item *
7256:
7257: reply() : uses subreply to send a message to remote machine, logs all failures
7258:
7259: =item *
7260:
7261: critical() : passes a critical message to another server; if cannot
7262: get through then place message in connection buffer directory and
7263: returns con_delayed, if incapable of saving message, returns
7264: con_failed
7265:
7266: =item *
7267:
7268: reconlonc() : tries to reconnect lonc client processes.
7269:
7270: =back
7271:
7272: =head2 Resource Access Logging
7273:
7274: =over 4
7275:
7276: =item *
7277:
7278: flushcourselogs() : flush (save) buffer logs and access logs
7279:
7280: =item *
7281:
7282: courselog($what) : save message for course in hash
7283:
7284: =item *
7285:
7286: courseacclog($what) : save message for course using &courselog(). Perform
7287: special processing for specific resource types (problems, exams, quizzes, etc).
7288:
7289: =item *
7290:
7291: goodbye() : flush course logs and log shutting down; it is called in srm.conf
7292: as a PerlChildExitHandler
7293:
7294: =back
7295:
7296: =head2 Other
7297:
7298: =over 4
7299:
7300: =item *
7301:
7302: symblist($mapname,%newhash) : update symbolic storage links
7303:
7304: =back
7305:
7306: =cut
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