1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.668 2005/10/27 17:01:35 raeburn 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 $tmpdir $_64bit
44: %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 Apache::lonlocal;
53: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
54: use Time::HiRes qw( gettimeofday tv_interval );
55: use Cache::Memcached;
56: my $readit;
57: my $max_connection_retries = 10; # Or some such value.
58:
59: require Exporter;
60:
61: our @ISA = qw (Exporter);
62: our @EXPORT = qw(%env);
63:
64: =pod
65:
66: =head1 Package Variables
67:
68: These are largely undocumented, so if you decipher one please note it here.
69:
70: =over 4
71:
72: =item $processmarker
73:
74: Contains the time this process was started and this servers host id.
75:
76: =item $dumpcount
77:
78: Counts the number of times a message log flush has been attempted (regardless
79: of success) by this process. Used as part of the filename when messages are
80: delayed.
81:
82: =back
83:
84: =cut
85:
86:
87: # --------------------------------------------------------------------- Logging
88:
89: sub logtouch {
90: my $execdir=$perlvar{'lonDaemons'};
91: unless (-e "$execdir/logs/lonnet.log") {
92: open(my $fh,">>$execdir/logs/lonnet.log");
93: close $fh;
94: }
95: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
96: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
97: }
98:
99: sub logthis {
100: my $message=shift;
101: my $execdir=$perlvar{'lonDaemons'};
102: my $now=time;
103: my $local=localtime($now);
104: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
105: print $fh "$local ($$): $message\n";
106: close($fh);
107: }
108: return 1;
109: }
110:
111: sub logperm {
112: my $message=shift;
113: my $execdir=$perlvar{'lonDaemons'};
114: my $now=time;
115: my $local=localtime($now);
116: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
117: print $fh "$now:$message:$local\n";
118: close($fh);
119: }
120: return 1;
121: }
122:
123: # -------------------------------------------------- Non-critical communication
124: sub subreply {
125: my ($cmd,$server)=@_;
126: my $peerfile="$perlvar{'lonSockDir'}/$server";
127: #
128: # With loncnew process trimming, there's a timing hole between lonc server
129: # process exit and the master server picking up the listen on the AF_UNIX
130: # socket. In that time interval, a lock file will exist:
131:
132: my $lockfile=$peerfile.".lock";
133: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
134: sleep(1);
135: }
136: # At this point, either a loncnew parent is listening or an old lonc
137: # or loncnew child is listening so we can connect or everything's dead.
138: #
139: # We'll give the connection a few tries before abandoning it. If
140: # connection is not possible, we'll con_lost back to the client.
141: #
142: my $client;
143: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
144: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
145: Type => SOCK_STREAM,
146: Timeout => 10);
147: if($client) {
148: last; # Connected!
149: }
150: sleep(1); # Try again later if failed connection.
151: }
152: my $answer;
153: if ($client) {
154: print $client "$cmd\n";
155: $answer=<$client>;
156: if (!$answer) { $answer="con_lost"; }
157: chomp($answer);
158: } else {
159: $answer = 'con_lost'; # Failed connection.
160: }
161: return $answer;
162: }
163:
164: sub reply {
165: my ($cmd,$server)=@_;
166: unless (defined($hostname{$server})) { return 'no_such_host'; }
167: my $answer=subreply($cmd,$server);
168: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
169: &logthis("<font color=blue>WARNING:".
170: " $cmd to $server returned $answer</font>");
171: }
172: return $answer;
173: }
174:
175: # ----------------------------------------------------------- Send USR1 to lonc
176:
177: sub reconlonc {
178: my $peerfile=shift;
179: &logthis("Trying to reconnect for $peerfile");
180: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
181: if (open(my $fh,"<$loncfile")) {
182: my $loncpid=<$fh>;
183: chomp($loncpid);
184: if (kill 0 => $loncpid) {
185: &logthis("lonc at pid $loncpid responding, sending USR1");
186: kill USR1 => $loncpid;
187: sleep 1;
188: if (-e "$peerfile") { return; }
189: &logthis("$peerfile still not there, give it another try");
190: sleep 5;
191: if (-e "$peerfile") { return; }
192: &logthis(
193: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
194: } else {
195: &logthis(
196: "<font color=blue>WARNING:".
197: " lonc at pid $loncpid not responding, giving up</font>");
198: }
199: } else {
200: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
201: }
202: }
203:
204: # ------------------------------------------------------ Critical communication
205:
206: sub critical {
207: my ($cmd,$server)=@_;
208: unless ($hostname{$server}) {
209: &logthis("<font color=blue>WARNING:".
210: " Critical message to unknown server ($server)</font>");
211: return 'no_such_host';
212: }
213: my $answer=reply($cmd,$server);
214: if ($answer eq 'con_lost') {
215: &reconlonc("$perlvar{'lonSockDir'}/$server");
216: my $answer=reply($cmd,$server);
217: if ($answer eq 'con_lost') {
218: my $now=time;
219: my $middlename=$cmd;
220: $middlename=substr($middlename,0,16);
221: $middlename=~s/\W//g;
222: my $dfilename=
223: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
224: $dumpcount++;
225: {
226: my $dfh;
227: if (open($dfh,">$dfilename")) {
228: print $dfh "$cmd\n";
229: close($dfh);
230: }
231: }
232: sleep 2;
233: my $wcmd='';
234: {
235: my $dfh;
236: if (open($dfh,"<$dfilename")) {
237: $wcmd=<$dfh>;
238: close($dfh);
239: }
240: }
241: chomp($wcmd);
242: if ($wcmd eq $cmd) {
243: &logthis("<font color=blue>WARNING: ".
244: "Connection buffer $dfilename: $cmd</font>");
245: &logperm("D:$server:$cmd");
246: return 'con_delayed';
247: } else {
248: &logthis("<font color=red>CRITICAL:"
249: ." Critical connection failed: $server $cmd</font>");
250: &logperm("F:$server:$cmd");
251: return 'con_failed';
252: }
253: }
254: }
255: return $answer;
256: }
257:
258: # ------------------------------------------- Transfer profile into environment
259:
260: sub transfer_profile_to_env {
261: my ($lonidsdir,$handle)=@_;
262: my @profile;
263: {
264: open(my $idf,"$lonidsdir/$handle.id");
265: flock($idf,LOCK_SH);
266: @profile=<$idf>;
267: close($idf);
268: }
269: my $envi;
270: my %Remove;
271: for ($envi=0;$envi<=$#profile;$envi++) {
272: chomp($profile[$envi]);
273: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
274: $env{$envname} = $envvalue;
275: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
276: if ($time < time-300) {
277: $Remove{$key}++;
278: }
279: }
280: }
281: $env{'user.environment'} = "$lonidsdir/$handle.id";
282: foreach my $expired_key (keys(%Remove)) {
283: &delenv($expired_key);
284: }
285: }
286:
287: # ---------------------------------------------------------- Append Environment
288:
289: sub appenv {
290: my %newenv=@_;
291: foreach (keys %newenv) {
292: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
293: &logthis("<font color=blue>WARNING: ".
294: "Attempt to modify environment ".$_." to ".$newenv{$_}
295: .'</font>');
296: delete($newenv{$_});
297: } else {
298: $env{$_}=$newenv{$_};
299: }
300: }
301:
302: my $lockfh;
303: unless (open($lockfh,"$env{'user.environment'}")) {
304: return 'error: '.$!;
305: }
306: unless (flock($lockfh,LOCK_EX)) {
307: &logthis("<font color=blue>WARNING: ".
308: 'Could not obtain exclusive lock in appenv: '.$!);
309: close($lockfh);
310: return 'error: '.$!;
311: }
312:
313: my @oldenv;
314: {
315: my $fh;
316: unless (open($fh,"$env{'user.environment'}")) {
317: return 'error: '.$!;
318: }
319: @oldenv=<$fh>;
320: close($fh);
321: }
322: for (my $i=0; $i<=$#oldenv; $i++) {
323: chomp($oldenv[$i]);
324: if ($oldenv[$i] ne '') {
325: my ($name,$value)=split(/=/,$oldenv[$i]);
326: unless (defined($newenv{$name})) {
327: $newenv{$name}=$value;
328: }
329: }
330: }
331: {
332: my $fh;
333: unless (open($fh,">$env{'user.environment'}")) {
334: return 'error';
335: }
336: my $newname;
337: foreach $newname (keys %newenv) {
338: print $fh "$newname=$newenv{$newname}\n";
339: }
340: close($fh);
341: }
342:
343: close($lockfh);
344: return 'ok';
345: }
346: # ----------------------------------------------------- Delete from Environment
347:
348: sub delenv {
349: my $delthis=shift;
350: my %newenv=();
351: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
352: &logthis("<font color=blue>WARNING: ".
353: "Attempt to delete from environment ".$delthis);
354: return 'error';
355: }
356: my @oldenv;
357: {
358: my $fh;
359: unless (open($fh,"$env{'user.environment'}")) {
360: return 'error';
361: }
362: unless (flock($fh,LOCK_SH)) {
363: &logthis("<font color=blue>WARNING: ".
364: 'Could not obtain shared lock in delenv: '.$!);
365: close($fh);
366: return 'error: '.$!;
367: }
368: @oldenv=<$fh>;
369: close($fh);
370: }
371: {
372: my $fh;
373: unless (open($fh,">$env{'user.environment'}")) {
374: return 'error';
375: }
376: unless (flock($fh,LOCK_EX)) {
377: &logthis("<font color=blue>WARNING: ".
378: 'Could not obtain exclusive lock in delenv: '.$!);
379: close($fh);
380: return 'error: '.$!;
381: }
382: foreach (@oldenv) {
383: if ($_=~/^$delthis/) {
384: my ($key,undef) = split('=',$_);
385: delete($env{$key});
386: } else {
387: print $fh $_;
388: }
389: }
390: close($fh);
391: }
392: return 'ok';
393: }
394:
395: # ------------------------------------------ Find out current server userload
396: # there is a copy in lond
397: sub userload {
398: my $numusers=0;
399: {
400: opendir(LONIDS,$perlvar{'lonIDsDir'});
401: my $filename;
402: my $curtime=time;
403: while ($filename=readdir(LONIDS)) {
404: if ($filename eq '.' || $filename eq '..') {next;}
405: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
406: if ($curtime-$mtime < 1800) { $numusers++; }
407: }
408: closedir(LONIDS);
409: }
410: my $userloadpercent=0;
411: my $maxuserload=$perlvar{'lonUserLoadLim'};
412: if ($maxuserload) {
413: $userloadpercent=100*$numusers/$maxuserload;
414: }
415: $userloadpercent=sprintf("%.2f",$userloadpercent);
416: return $userloadpercent;
417: }
418:
419: # ------------------------------------------ Fight off request when overloaded
420:
421: sub overloaderror {
422: my ($r,$checkserver)=@_;
423: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
424: my $loadavg;
425: if ($checkserver eq $perlvar{'lonHostID'}) {
426: open(my $loadfile,'/proc/loadavg');
427: $loadavg=<$loadfile>;
428: $loadavg =~ s/\s.*//g;
429: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
430: close($loadfile);
431: } else {
432: $loadavg=&reply('load',$checkserver);
433: }
434: my $overload=$loadavg-100;
435: if ($overload>0) {
436: $r->err_headers_out->{'Retry-After'}=$overload;
437: $r->log_error('Overload of '.$overload.' on '.$checkserver);
438: return 413;
439: }
440: return '';
441: }
442:
443: # ------------------------------ Find server with least workload from spare.tab
444:
445: sub spareserver {
446: my ($loadpercent,$userloadpercent) = @_;
447: my $tryserver;
448: my $spareserver='';
449: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
450: my $lowestserver=$loadpercent > $userloadpercent?
451: $loadpercent : $userloadpercent;
452: foreach $tryserver (keys %spareid) {
453: my $loadans=reply('load',$tryserver);
454: my $userloadans=reply('userload',$tryserver);
455: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
456: next; #didn't get a number from the server
457: }
458: my $answer;
459: if ($loadans =~ /\d/) {
460: if ($userloadans =~ /\d/) {
461: #both are numbers, pick the bigger one
462: $answer=$loadans > $userloadans?
463: $loadans : $userloadans;
464: } else {
465: $answer = $loadans;
466: }
467: } else {
468: $answer = $userloadans;
469: }
470: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
471: $spareserver="http://$hostname{$tryserver}";
472: $lowestserver=$answer;
473: }
474: }
475: return $spareserver;
476: }
477:
478: # --------------------------------------------- Try to change a user's password
479:
480: sub changepass {
481: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
482: $currentpass = &escape($currentpass);
483: $newpass = &escape($newpass);
484: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
485: $server);
486: if (! $answer) {
487: &logthis("No reply on password change request to $server ".
488: "by $uname in domain $udom.");
489: } elsif ($answer =~ "^ok") {
490: &logthis("$uname in $udom successfully changed their password ".
491: "on $server.");
492: } elsif ($answer =~ "^pwchange_failure") {
493: &logthis("$uname in $udom was unable to change their password ".
494: "on $server. The action was blocked by either lcpasswd ".
495: "or pwchange");
496: } elsif ($answer =~ "^non_authorized") {
497: &logthis("$uname in $udom did not get their password correct when ".
498: "attempting to change it on $server.");
499: } elsif ($answer =~ "^auth_mode_error") {
500: &logthis("$uname in $udom attempted to change their password despite ".
501: "not being locally or internally authenticated on $server.");
502: } elsif ($answer =~ "^unknown_user") {
503: &logthis("$uname in $udom attempted to change their password ".
504: "on $server but were unable to because $server is not ".
505: "their home server.");
506: } elsif ($answer =~ "^refused") {
507: &logthis("$server refused to change $uname in $udom password because ".
508: "it was sent an unencrypted request to change the password.");
509: }
510: return $answer;
511: }
512:
513: # ----------------------- Try to determine user's current authentication scheme
514:
515: sub queryauthenticate {
516: my ($uname,$udom)=@_;
517: my $uhome=&homeserver($uname,$udom);
518: if (!$uhome) {
519: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
520: return 'no_host';
521: }
522: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
523: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
524: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
525: }
526: return $answer;
527: }
528:
529: # --------- Try to authenticate user from domain's lib servers (first this one)
530:
531: sub authenticate {
532: my ($uname,$upass,$udom)=@_;
533: $upass=escape($upass);
534: $uname=~s/\W//g;
535: my $uhome=&homeserver($uname,$udom);
536: if (!$uhome) {
537: &logthis("User $uname at $udom is unknown in authenticate");
538: return 'no_host';
539: }
540: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
541: if ($answer eq 'authorized') {
542: &logthis("User $uname at $udom authorized by $uhome");
543: return $uhome;
544: }
545: if ($answer eq 'non_authorized') {
546: &logthis("User $uname at $udom rejected by $uhome");
547: return 'no_host';
548: }
549: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
550: return 'no_host';
551: }
552:
553: # ---------------------- Find the homebase for a user from domain's lib servers
554:
555: my %homecache;
556: sub homeserver {
557: my ($uname,$udom,$ignoreBadCache)=@_;
558: my $index="$uname:$udom";
559:
560: if (exists($homecache{$index})) { return $homecache{$index}; }
561: my $tryserver;
562: foreach $tryserver (keys %libserv) {
563: next if ($ignoreBadCache ne 'true' &&
564: exists($badServerCache{$tryserver}));
565: if ($hostdom{$tryserver} eq $udom) {
566: my $answer=reply("home:$udom:$uname",$tryserver);
567: if ($answer eq 'found') {
568: return $homecache{$index}=$tryserver;
569: } elsif ($answer eq 'no_host') {
570: $badServerCache{$tryserver}=1;
571: }
572: }
573: }
574: return 'no_host';
575: }
576:
577: # ------------------------------------- Find the usernames behind a list of IDs
578:
579: sub idget {
580: my ($udom,@ids)=@_;
581: my %returnhash=();
582:
583: my $tryserver;
584: foreach $tryserver (keys %libserv) {
585: if ($hostdom{$tryserver} eq $udom) {
586: my $idlist=join('&',@ids);
587: $idlist=~tr/A-Z/a-z/;
588: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
589: my @answer=();
590: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
591: @answer=split(/\&/,$reply);
592: } ;
593: my $i;
594: for ($i=0;$i<=$#ids;$i++) {
595: if ($answer[$i]) {
596: $returnhash{$ids[$i]}=$answer[$i];
597: }
598: }
599: }
600: }
601: return %returnhash;
602: }
603:
604: # ------------------------------------- Find the IDs behind a list of usernames
605:
606: sub idrget {
607: my ($udom,@unames)=@_;
608: my %returnhash=();
609: foreach (@unames) {
610: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
611: }
612: return %returnhash;
613: }
614:
615: # ------------------------------- Store away a list of names and associated IDs
616:
617: sub idput {
618: my ($udom,%ids)=@_;
619: my %servers=();
620: foreach (keys %ids) {
621: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
622: my $uhom=&homeserver($_,$udom);
623: if ($uhom ne 'no_host') {
624: my $id=&escape($ids{$_});
625: $id=~tr/A-Z/a-z/;
626: my $unam=&escape($_);
627: if ($servers{$uhom}) {
628: $servers{$uhom}.='&'.$id.'='.$unam;
629: } else {
630: $servers{$uhom}=$id.'='.$unam;
631: }
632: }
633: }
634: foreach (keys %servers) {
635: &critical('idput:'.$udom.':'.$servers{$_},$_);
636: }
637: }
638:
639: # --------------------------------------------------- Assign a key to a student
640:
641: sub assign_access_key {
642: #
643: # a valid key looks like uname:udom#comments
644: # comments are being appended
645: #
646: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
647: $kdom=
648: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
649: $knum=
650: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
651: $cdom=
652: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
653: $cnum=
654: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
655: $udom=$env{'user.name'} unless (defined($udom));
656: $uname=$env{'user.domain'} unless (defined($uname));
657: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
658: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
659: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
660: # assigned to this person
661: # - this should not happen,
662: # unless something went wrong
663: # the first time around
664: # ready to assign
665: $logentry=$1.'; '.$logentry;
666: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
667: $kdom,$knum) eq 'ok') {
668: # key now belongs to user
669: my $envkey='key.'.$cdom.'_'.$cnum;
670: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
671: &appenv('environment.'.$envkey => $ckey);
672: return 'ok';
673: } else {
674: return
675: 'error: Count not permanently assign key, will need to be re-entered later.';
676: }
677: } else {
678: return 'error: Could not assign key, try again later.';
679: }
680: } elsif (!$existing{$ckey}) {
681: # the key does not exist
682: return 'error: The key does not exist';
683: } else {
684: # the key is somebody else's
685: return 'error: The key is already in use';
686: }
687: }
688:
689: # ------------------------------------------ put an additional comment on a key
690:
691: sub comment_access_key {
692: #
693: # a valid key looks like uname:udom#comments
694: # comments are being appended
695: #
696: my ($ckey,$cdom,$cnum,$logentry)=@_;
697: $cdom=
698: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
699: $cnum=
700: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
701: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
702: if ($existing{$ckey}) {
703: $existing{$ckey}.='; '.$logentry;
704: # ready to assign
705: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
706: $cdom,$cnum) eq 'ok') {
707: return 'ok';
708: } else {
709: return 'error: Count not store comment.';
710: }
711: } else {
712: # the key does not exist
713: return 'error: The key does not exist';
714: }
715: }
716:
717: # ------------------------------------------------------ Generate a set of keys
718:
719: sub generate_access_keys {
720: my ($number,$cdom,$cnum,$logentry)=@_;
721: $cdom=
722: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
723: $cnum=
724: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
725: unless (&allowed('mky',$cdom)) { return 0; }
726: unless (($cdom) && ($cnum)) { return 0; }
727: if ($number>10000) { return 0; }
728: sleep(2); # make sure don't get same seed twice
729: srand(time()^($$+($$<<15))); # from "Programming Perl"
730: my $total=0;
731: for (my $i=1;$i<=$number;$i++) {
732: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
733: sprintf("%lx",int(100000*rand)).'-'.
734: sprintf("%lx",int(100000*rand));
735: $newkey=~s/1/g/g; # folks mix up 1 and l
736: $newkey=~s/0/h/g; # and also 0 and O
737: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
738: if ($existing{$newkey}) {
739: $i--;
740: } else {
741: if (&put('accesskeys',
742: { $newkey => '# generated '.localtime().
743: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
744: '; '.$logentry },
745: $cdom,$cnum) eq 'ok') {
746: $total++;
747: }
748: }
749: }
750: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
751: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
752: return $total;
753: }
754:
755: # ------------------------------------------------------- Validate an accesskey
756:
757: sub validate_access_key {
758: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
759: $cdom=
760: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
761: $cnum=
762: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
763: $udom=$env{'user.domain'} unless (defined($udom));
764: $uname=$env{'user.name'} unless (defined($uname));
765: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
766: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
767: }
768:
769: # ------------------------------------- Find the section of student in a course
770: sub devalidate_getsection_cache {
771: my ($udom,$unam,$courseid)=@_;
772: $courseid=~s/\_/\//g;
773: $courseid=~s/^(\w)/\/$1/;
774: my $hashid="$udom:$unam:$courseid";
775: &devalidate_cache_new('getsection',$hashid);
776: }
777:
778: sub getsection {
779: my ($udom,$unam,$courseid)=@_;
780: my $cachetime=1800;
781: $courseid=~s/\_/\//g;
782: $courseid=~s/^(\w)/\/$1/;
783:
784: my $hashid="$udom:$unam:$courseid";
785: my ($result,$cached)=&is_cached_new('getsection',$hashid);
786: if (defined($cached)) { return $result; }
787:
788: my %Pending;
789: my %Expired;
790: #
791: # Each role can either have not started yet (pending), be active,
792: # or have expired.
793: #
794: # If there is an active role, we are done.
795: #
796: # If there is more than one role which has not started yet,
797: # choose the one which will start sooner
798: # If there is one role which has not started yet, return it.
799: #
800: # If there is more than one expired role, choose the one which ended last.
801: # If there is a role which has expired, return it.
802: #
803: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
804: &homeserver($unam,$udom)))) {
805: my ($key,$value)=split(/\=/,$_);
806: $key=&unescape($key);
807: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
808: my $section=$1;
809: if ($key eq $courseid.'_st') { $section=''; }
810: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
811: my $now=time;
812: if (defined($end) && $end && ($now > $end)) {
813: $Expired{$end}=$section;
814: next;
815: }
816: if (defined($start) && $start && ($now < $start)) {
817: $Pending{$start}=$section;
818: next;
819: }
820: return &do_cache_new('getsection',$hashid,$section,$cachetime);
821: }
822: #
823: # Presumedly there will be few matching roles from the above
824: # loop and the sorting time will be negligible.
825: if (scalar(keys(%Pending))) {
826: my ($time) = sort {$a <=> $b} keys(%Pending);
827: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
828: }
829: if (scalar(keys(%Expired))) {
830: my @sorted = sort {$a <=> $b} keys(%Expired);
831: my $time = pop(@sorted);
832: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
833: }
834: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
835: }
836:
837: sub save_cache {
838: my ($r)=@_;
839: if (! $r->is_initial_req()) { return DECLINED; }
840: &purge_remembered();
841: undef(%env);
842: return OK;
843: }
844:
845: my $to_remember=-1;
846: my %remembered;
847: my %accessed;
848: my $kicks=0;
849: my $hits=0;
850: sub devalidate_cache_new {
851: my ($name,$id,$debug) = @_;
852: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
853: $id=&escape($name.':'.$id);
854: $memcache->delete($id);
855: delete($remembered{$id});
856: delete($accessed{$id});
857: }
858:
859: sub is_cached_new {
860: my ($name,$id,$debug) = @_;
861: $id=&escape($name.':'.$id);
862: if (exists($remembered{$id})) {
863: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
864: $accessed{$id}=[&gettimeofday()];
865: $hits++;
866: return ($remembered{$id},1);
867: }
868: my $value = $memcache->get($id);
869: if (!(defined($value))) {
870: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
871: return (undef,undef);
872: }
873: if ($value eq '__undef__') {
874: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
875: $value=undef;
876: }
877: &make_room($id,$value,$debug);
878: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
879: return ($value,1);
880: }
881:
882: sub do_cache_new {
883: my ($name,$id,$value,$time,$debug) = @_;
884: $id=&escape($name.':'.$id);
885: my $setvalue=$value;
886: if (!defined($setvalue)) {
887: $setvalue='__undef__';
888: }
889: if (!defined($time) ) {
890: $time=600;
891: }
892: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
893: $memcache->set($id,$setvalue,$time);
894: # need to make a copy of $value
895: #&make_room($id,$value,$debug);
896: return $value;
897: }
898:
899: sub make_room {
900: my ($id,$value,$debug)=@_;
901: $remembered{$id}=$value;
902: if ($to_remember<0) { return; }
903: $accessed{$id}=[&gettimeofday()];
904: if (scalar(keys(%remembered)) <= $to_remember) { return; }
905: my $to_kick;
906: my $max_time=0;
907: foreach my $other (keys(%accessed)) {
908: if (&tv_interval($accessed{$other}) > $max_time) {
909: $to_kick=$other;
910: $max_time=&tv_interval($accessed{$other});
911: }
912: }
913: delete($remembered{$to_kick});
914: delete($accessed{$to_kick});
915: $kicks++;
916: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
917: return;
918: }
919:
920: sub purge_remembered {
921: #&logthis("Tossing ".scalar(keys(%remembered)));
922: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
923: undef(%remembered);
924: undef(%accessed);
925: }
926: # ------------------------------------- Read an entry from a user's environment
927:
928: sub userenvironment {
929: my ($udom,$unam,@what)=@_;
930: my %returnhash=();
931: my @answer=split(/\&/,
932: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
933: &homeserver($unam,$udom)));
934: my $i;
935: for ($i=0;$i<=$#what;$i++) {
936: $returnhash{$what[$i]}=&unescape($answer[$i]);
937: }
938: return %returnhash;
939: }
940:
941: # ---------------------------------------------------------- Get a studentphoto
942: sub studentphoto {
943: my ($udom,$unam,$ext) = @_;
944: my $home=&Apache::lonnet::homeserver($unam,$udom);
945: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext",$home);
946: my $url="/uploaded/$udom/$unam/internal/studentphoto.".$ext;
947: if ($ret ne 'ok') {
948: return '/adm/lonKaputt/lonlogo_broken.gif';
949: }
950: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
951: return $tokenurl;
952: }
953:
954: # -------------------------------------------------------------------- New chat
955:
956: sub chatsend {
957: my ($newentry,$anon)=@_;
958: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
959: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
960: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
961: &reply('chatsend:'.$cdom.':'.$cnum.':'.
962: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
963: &escape($newentry)),$chome);
964: }
965:
966: # ------------------------------------------ Find current version of a resource
967:
968: sub getversion {
969: my $fname=&clutter(shift);
970: unless ($fname=~/^\/res\//) { return -1; }
971: return ¤tversion(&filelocation('',$fname));
972: }
973:
974: sub currentversion {
975: my $fname=shift;
976: my ($result,$cached)=&is_cached_new('resversion',$fname);
977: if (defined($cached)) { return $result; }
978: my $author=$fname;
979: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
980: my ($udom,$uname)=split(/\//,$author);
981: my $home=homeserver($uname,$udom);
982: if ($home eq 'no_host') {
983: return -1;
984: }
985: my $answer=reply("currentversion:$fname",$home);
986: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
987: return -1;
988: }
989: return &do_cache_new('resversion',$fname,$answer,600);
990: }
991:
992: # ----------------------------- Subscribe to a resource, return URL if possible
993:
994: sub subscribe {
995: my $fname=shift;
996: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
997: $fname=~s/[\n\r]//g;
998: my $author=$fname;
999: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1000: my ($udom,$uname)=split(/\//,$author);
1001: my $home=homeserver($uname,$udom);
1002: if ($home eq 'no_host') {
1003: return 'not_found';
1004: }
1005: my $answer=reply("sub:$fname",$home);
1006: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1007: $answer.=' by '.$home;
1008: }
1009: return $answer;
1010: }
1011:
1012: # -------------------------------------------------------------- Replicate file
1013:
1014: sub repcopy {
1015: my $filename=shift;
1016: $filename=~s/\/+/\//g;
1017: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1018: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1019: if ($filename=~m|^/home/httpd/html/userfiles/| or
1020: $filename=~m -^/*(uploaded|editupload)/-) {
1021: return &repcopy_userfile($filename);
1022: }
1023: $filename=~s/[\n\r]//g;
1024: my $transname="$filename.in.transfer";
1025: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1026: my $remoteurl=subscribe($filename);
1027: if ($remoteurl =~ /^con_lost by/) {
1028: &logthis("Subscribe returned $remoteurl: $filename");
1029: return 'unavailable';
1030: } elsif ($remoteurl eq 'not_found') {
1031: #&logthis("Subscribe returned not_found: $filename");
1032: return 'not_found';
1033: } elsif ($remoteurl =~ /^rejected by/) {
1034: &logthis("Subscribe returned $remoteurl: $filename");
1035: return 'forbidden';
1036: } elsif ($remoteurl eq 'directory') {
1037: return 'ok';
1038: } else {
1039: my $author=$filename;
1040: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1041: my ($udom,$uname)=split(/\//,$author);
1042: my $home=homeserver($uname,$udom);
1043: unless ($home eq $perlvar{'lonHostID'}) {
1044: my @parts=split(/\//,$filename);
1045: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1046: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1047: &logthis("Malconfiguration for replication: $filename");
1048: return 'bad_request';
1049: }
1050: my $count;
1051: for ($count=5;$count<$#parts;$count++) {
1052: $path.="/$parts[$count]";
1053: if ((-e $path)!=1) {
1054: mkdir($path,0777);
1055: }
1056: }
1057: my $ua=new LWP::UserAgent;
1058: my $request=new HTTP::Request('GET',"$remoteurl");
1059: my $response=$ua->request($request,$transname);
1060: if ($response->is_error()) {
1061: unlink($transname);
1062: my $message=$response->status_line;
1063: &logthis("<font color=blue>WARNING:"
1064: ." LWP get: $message: $filename</font>");
1065: return 'unavailable';
1066: } else {
1067: if ($remoteurl!~/\.meta$/) {
1068: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1069: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1070: if ($mresponse->is_error()) {
1071: unlink($filename.'.meta');
1072: &logthis(
1073: "<font color=yellow>INFO: No metadata: $filename</font>");
1074: }
1075: }
1076: rename($transname,$filename);
1077: return 'ok';
1078: }
1079: }
1080: }
1081: }
1082:
1083: # ------------------------------------------------ Get server side include body
1084: sub ssi_body {
1085: my ($filelink,%form)=@_;
1086: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1087: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1088: }
1089: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1090: &ssi($filelink,%form));
1091: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs;
1092: $output=~s/^.*?\<body[^\>]*\>//si;
1093: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1094: return $output;
1095: }
1096:
1097: # --------------------------------------------------------- Server Side Include
1098:
1099: sub ssi {
1100:
1101: my ($fn,%form)=@_;
1102:
1103: my $ua=new LWP::UserAgent;
1104:
1105: my $request;
1106:
1107: if (%form) {
1108: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1109: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1110: } else {
1111: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1112: }
1113:
1114: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1115: my $response=$ua->request($request);
1116:
1117: return $response->content;
1118: }
1119:
1120: sub externalssi {
1121: my ($url)=@_;
1122: my $ua=new LWP::UserAgent;
1123: my $request=new HTTP::Request('GET',$url);
1124: my $response=$ua->request($request);
1125: return $response->content;
1126: }
1127:
1128: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1129:
1130: sub allowuploaded {
1131: my ($srcurl,$url)=@_;
1132: $url=&clutter(&declutter($url));
1133: my $dir=$url;
1134: $dir=~s/\/[^\/]+$//;
1135: my %httpref=();
1136: my $httpurl=&hreflocation('',$url);
1137: $httpref{'httpref.'.$httpurl}=$srcurl;
1138: &Apache::lonnet::appenv(%httpref);
1139: }
1140:
1141: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1142: # input: action, courseID, current domain, intended
1143: # path to file, source of file, instruction to parse file for objects,
1144: # ref to hash for embedded objects,
1145: # ref to hash for codebase of java objects.
1146: #
1147: # output: url to file (if action was uploaddoc),
1148: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1149: #
1150: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1151: # course.
1152: #
1153: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1154: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1155: # course's home server.
1156: #
1157: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1158: # be copied from $source (current location) to
1159: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1160: # and will then be copied to
1161: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1162: # course's home server.
1163: #
1164: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1165: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1166: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1167: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1168: # in course's home server.
1169: #
1170:
1171: sub process_coursefile {
1172: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1173: my $fetchresult;
1174: my $home=&homeserver($docuname,$docudom);
1175: if ($action eq 'propagate') {
1176: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1177: $home);
1178: } else {
1179: my $fpath = '';
1180: my $fname = $file;
1181: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1182: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1183: my $filepath = &build_filepath($fpath);
1184: if ($action eq 'copy') {
1185: if ($source eq '') {
1186: $fetchresult = 'no source file';
1187: return $fetchresult;
1188: } else {
1189: my $destination = $filepath.'/'.$fname;
1190: rename($source,$destination);
1191: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1192: $home);
1193: }
1194: } elsif ($action eq 'uploaddoc') {
1195: open(my $fh,'>'.$filepath.'/'.$fname);
1196: print $fh $env{'form.'.$source};
1197: close($fh);
1198: if ($parser eq 'parse') {
1199: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1200: unless ($parse_result eq 'ok') {
1201: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1202: }
1203: }
1204: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1205: $home);
1206: if ($fetchresult eq 'ok') {
1207: return '/uploaded/'.$fpath.'/'.$fname;
1208: } else {
1209: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1210: ' to host '.$home.': '.$fetchresult);
1211: return '/adm/notfound.html';
1212: }
1213: }
1214: }
1215: unless ( $fetchresult eq 'ok') {
1216: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1217: ' to host '.$home.': '.$fetchresult);
1218: }
1219: return $fetchresult;
1220: }
1221:
1222: sub build_filepath {
1223: my ($fpath) = @_;
1224: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1225: unless ($fpath eq '') {
1226: my @parts=split('/',$fpath);
1227: foreach my $part (@parts) {
1228: $filepath.= '/'.$part;
1229: if ((-e $filepath)!=1) {
1230: mkdir($filepath,0777);
1231: }
1232: }
1233: }
1234: return $filepath;
1235: }
1236:
1237: sub store_edited_file {
1238: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1239: my $file = $primary_url;
1240: $file =~ s#^/uploaded/$docudom/$docuname/##;
1241: my $fpath = '';
1242: my $fname = $file;
1243: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1244: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1245: my $filepath = &build_filepath($fpath);
1246: open(my $fh,'>'.$filepath.'/'.$fname);
1247: print $fh $content;
1248: close($fh);
1249: my $home=&homeserver($docuname,$docudom);
1250: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1251: $home);
1252: if ($$fetchresult eq 'ok') {
1253: return '/uploaded/'.$fpath.'/'.$fname;
1254: } else {
1255: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1256: ' to host '.$home.': '.$$fetchresult);
1257: return '/adm/notfound.html';
1258: }
1259: }
1260:
1261: sub clean_filename {
1262: my ($fname)=@_;
1263: # Replace Windows backslashes by forward slashes
1264: $fname=~s/\\/\//g;
1265: # Get rid of everything but the actual filename
1266: $fname=~s/^.*\/([^\/]+)$/$1/;
1267: # Replace spaces by underscores
1268: $fname=~s/\s+/\_/g;
1269: # Replace all other weird characters by nothing
1270: $fname=~s/[^\w\.\-]//g;
1271: # Replace all .\d. sequences with _\d. so they no longer look like version
1272: # numbers
1273: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1274: return $fname;
1275: }
1276:
1277: # --------------- Take an uploaded file and put it into the userfiles directory
1278: # input: name of form element, coursedoc=1 means this is for the course
1279: # output: url of file in userspace
1280:
1281:
1282: sub userfileupload {
1283: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase)=@_;
1284: if (!defined($subdir)) { $subdir='unknown'; }
1285: my $fname=$env{'form.'.$formname.'.filename'};
1286: $fname=&clean_filename($fname);
1287: # See if there is anything left
1288: unless ($fname) { return 'error: no uploaded file'; }
1289: chop($env{'form.'.$formname});
1290: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1291: my $now = time;
1292: my $filepath = 'tmp/helprequests/'.$now;
1293: my @parts=split(/\//,$filepath);
1294: my $fullpath = $perlvar{'lonDaemons'};
1295: for (my $i=0;$i<@parts;$i++) {
1296: $fullpath .= '/'.$parts[$i];
1297: if ((-e $fullpath)!=1) {
1298: mkdir($fullpath,0777);
1299: }
1300: }
1301: open(my $fh,'>'.$fullpath.'/'.$fname);
1302: print $fh $env{'form.'.$formname};
1303: close($fh);
1304: return $fullpath.'/'.$fname;
1305: }
1306: # Create the directory if not present
1307: $fname="$subdir/$fname";
1308: if ($coursedoc) {
1309: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1310: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1311: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1312: return &finishuserfileupload($docuname,$docudom,
1313: $formname,$fname,$parser,$allfiles,
1314: $codebase);
1315: } else {
1316: $fname=$env{'form.folder'}.'/'.$fname;
1317: return &process_coursefile('uploaddoc',$docuname,$docudom,
1318: $fname,$formname,$parser,
1319: $allfiles,$codebase);
1320: }
1321: } else {
1322: my $docuname=$env{'user.name'};
1323: my $docudom=$env{'user.domain'};
1324: return &finishuserfileupload($docuname,$docudom,$formname,
1325: $fname,$parser,$allfiles,$codebase);
1326: }
1327: }
1328:
1329: sub finishuserfileupload {
1330: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
1331: my $path=$docudom.'/'.$docuname.'/';
1332: my $filepath=$perlvar{'lonDocRoot'};
1333: my ($fnamepath,$file);
1334: $file=$fname;
1335: if ($fname=~m|/|) {
1336: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1337: $path.=$fnamepath.'/';
1338: }
1339: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1340: my $count;
1341: for ($count=4;$count<=$#parts;$count++) {
1342: $filepath.="/$parts[$count]";
1343: if ((-e $filepath)!=1) {
1344: mkdir($filepath,0777);
1345: }
1346: }
1347: # Save the file
1348: {
1349: open(FH,'>'.$filepath.'/'.$file);
1350: print FH $env{'form.'.$formname};
1351: close(FH);
1352: }
1353: if ($parser eq 'parse') {
1354: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1355: $codebase);
1356: unless ($parse_result eq 'ok') {
1357: &logthis('Failed to parse '.$filepath.$file.
1358: ' for embedded media: '.$parse_result);
1359: }
1360: }
1361: # Notify homeserver to grep it
1362: #
1363: my $docuhome=&homeserver($docuname,$docudom);
1364: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1365: if ($fetchresult eq 'ok') {
1366: #
1367: # Return the URL to it
1368: return '/uploaded/'.$path.$file;
1369: } else {
1370: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1371: ': '.$fetchresult);
1372: return '/adm/notfound.html';
1373: }
1374: }
1375:
1376: sub extract_embedded_items {
1377: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1378: my @state = ();
1379: my %javafiles = (
1380: codebase => '',
1381: code => '',
1382: archive => ''
1383: );
1384: my %mediafiles = (
1385: src => '',
1386: movie => '',
1387: );
1388: my $p;
1389: if ($content) {
1390: $p = HTML::LCParser->new($content);
1391: } else {
1392: $p = HTML::LCParser->new($filepath.'/'.$file);
1393: }
1394: while (my $t=$p->get_token()) {
1395: if ($t->[0] eq 'S') {
1396: my ($tagname, $attr) = ($t->[1],$t->[2]);
1397: push (@state, $tagname);
1398: if (lc($tagname) eq 'allow') {
1399: &add_filetype($allfiles,$attr->{'src'},'src');
1400: }
1401: if (lc($tagname) eq 'img') {
1402: &add_filetype($allfiles,$attr->{'src'},'src');
1403: }
1404: if (lc($tagname) eq 'script') {
1405: if ($attr->{'archive'} =~ /\.jar$/i) {
1406: &add_filetype($allfiles,$attr->{'archive'},'archive');
1407: } else {
1408: &add_filetype($allfiles,$attr->{'src'},'src');
1409: }
1410: }
1411: if (lc($tagname) eq 'link') {
1412: if (lc($attr->{'rel'}) eq 'stylesheet') {
1413: &add_filetype($allfiles,$attr->{'href'},'href');
1414: }
1415: }
1416: if (lc($tagname) eq 'object' ||
1417: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1418: foreach my $item (keys(%javafiles)) {
1419: $javafiles{$item} = '';
1420: }
1421: }
1422: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1423: my $name = lc($attr->{'name'});
1424: foreach my $item (keys(%javafiles)) {
1425: if ($name eq $item) {
1426: $javafiles{$item} = $attr->{'value'};
1427: last;
1428: }
1429: }
1430: foreach my $item (keys(%mediafiles)) {
1431: if ($name eq $item) {
1432: &add_filetype($allfiles, $attr->{'value'}, 'value');
1433: last;
1434: }
1435: }
1436: }
1437: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1438: foreach my $item (keys(%javafiles)) {
1439: if ($attr->{$item}) {
1440: $javafiles{$item} = $attr->{$item};
1441: last;
1442: }
1443: }
1444: foreach my $item (keys(%mediafiles)) {
1445: if ($attr->{$item}) {
1446: &add_filetype($allfiles,$attr->{$item},$item);
1447: last;
1448: }
1449: }
1450: }
1451: } elsif ($t->[0] eq 'E') {
1452: my ($tagname) = ($t->[1]);
1453: if ($javafiles{'codebase'} ne '') {
1454: $javafiles{'codebase'} .= '/';
1455: }
1456: if (lc($tagname) eq 'applet' ||
1457: lc($tagname) eq 'object' ||
1458: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1459: ) {
1460: foreach my $item (keys(%javafiles)) {
1461: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1462: my $file=$javafiles{'codebase'}.$javafiles{$item};
1463: &add_filetype($allfiles,$file,$item);
1464: }
1465: }
1466: }
1467: pop @state;
1468: }
1469: }
1470: return 'ok';
1471: }
1472:
1473: sub add_filetype {
1474: my ($allfiles,$file,$type)=@_;
1475: if (exists($allfiles->{$file})) {
1476: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1477: push(@{$allfiles->{$file}}, &escape($type));
1478: }
1479: } else {
1480: @{$allfiles->{$file}} = (&escape($type));
1481: }
1482: }
1483:
1484: sub removeuploadedurl {
1485: my ($url)=@_;
1486: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1487: return &removeuserfile($uname,$udom,$fname);
1488: }
1489:
1490: sub removeuserfile {
1491: my ($docuname,$docudom,$fname)=@_;
1492: my $home=&homeserver($docuname,$docudom);
1493: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1494: }
1495:
1496: sub mkdiruserfile {
1497: my ($docuname,$docudom,$dir)=@_;
1498: my $home=&homeserver($docuname,$docudom);
1499: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1500: }
1501:
1502: sub renameuserfile {
1503: my ($docuname,$docudom,$old,$new)=@_;
1504: my $home=&homeserver($docuname,$docudom);
1505: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1506: &escape("$new"),$home);
1507: }
1508:
1509: # ------------------------------------------------------------------------- Log
1510:
1511: sub log {
1512: my ($dom,$nam,$hom,$what)=@_;
1513: return critical("log:$dom:$nam:$what",$hom);
1514: }
1515:
1516: # ------------------------------------------------------------------ Course Log
1517: #
1518: # This routine flushes several buffers of non-mission-critical nature
1519: #
1520:
1521: sub flushcourselogs {
1522: &logthis('Flushing log buffers');
1523: #
1524: # course logs
1525: # This is a log of all transactions in a course, which can be used
1526: # for data mining purposes
1527: #
1528: # It also collects the courseid database, which lists last transaction
1529: # times and course titles for all courseids
1530: #
1531: my %courseidbuffer=();
1532: foreach (keys %courselogs) {
1533: my $crsid=$_;
1534: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1535: &escape($courselogs{$crsid}),
1536: $coursehombuf{$crsid}) eq 'ok') {
1537: delete $courselogs{$crsid};
1538: } else {
1539: &logthis('Failed to flush log buffer for '.$crsid);
1540: if (length($courselogs{$crsid})>40000) {
1541: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1542: " exceeded maximum size, deleting.</font>");
1543: delete $courselogs{$crsid};
1544: }
1545: }
1546: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1547: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1548: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1549: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1550: } else {
1551: $courseidbuffer{$coursehombuf{$crsid}}=
1552: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1553: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1554: }
1555: }
1556: #
1557: # Write course id database (reverse lookup) to homeserver of courses
1558: # Is used in pickcourse
1559: #
1560: foreach (keys %courseidbuffer) {
1561: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1562: }
1563: #
1564: # File accesses
1565: # Writes to the dynamic metadata of resources to get hit counts, etc.
1566: #
1567: foreach my $entry (keys(%accesshash)) {
1568: if ($entry =~ /___count$/) {
1569: my ($dom,$name);
1570: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1571: if (! defined($dom) || $dom eq '' ||
1572: ! defined($name) || $name eq '') {
1573: my $cid = $env{'request.course.id'};
1574: $dom = $env{'request.'.$cid.'.domain'};
1575: $name = $env{'request.'.$cid.'.num'};
1576: }
1577: my $value = $accesshash{$entry};
1578: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1579: my %temphash=($url => $value);
1580: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1581: if ($result eq 'ok') {
1582: delete $accesshash{$entry};
1583: } elsif ($result eq 'unknown_cmd') {
1584: # Target server has old code running on it.
1585: my %temphash=($entry => $value);
1586: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1587: delete $accesshash{$entry};
1588: }
1589: }
1590: } else {
1591: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1592: my %temphash=($entry => $accesshash{$entry});
1593: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1594: delete $accesshash{$entry};
1595: }
1596: }
1597: }
1598: #
1599: # Roles
1600: # Reverse lookup of user roles for course faculty/staff and co-authorship
1601: #
1602: foreach (keys %userrolehash) {
1603: my $entry=$_;
1604: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1605: split(/\:/,$entry);
1606: if (&Apache::lonnet::put('nohist_userroles',
1607: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1608: $rudom,$runame) eq 'ok') {
1609: delete $userrolehash{$entry};
1610: }
1611: }
1612: #
1613: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1614: #
1615: my %domrolebuffer = ();
1616: foreach my $entry (keys %domainrolehash) {
1617: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1618: if ($domrolebuffer{$rudom}) {
1619: $domrolebuffer{$rudom}.='&'.&escape($entry).
1620: '='.&escape($domainrolehash{$entry});
1621: } else {
1622: $domrolebuffer{$rudom}.=&escape($entry).
1623: '='.&escape($domainrolehash{$entry});
1624: }
1625: delete $domainrolehash{$entry};
1626: }
1627: foreach my $dom (keys(%domrolebuffer)) {
1628: foreach my $tryserver (keys %libserv) {
1629: if ($hostdom{$tryserver} eq $dom) {
1630: unless (&reply('domroleput:'.$dom.':'.
1631: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1632: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1633: }
1634: }
1635: }
1636: }
1637: $dumpcount++;
1638: }
1639:
1640: sub courselog {
1641: my $what=shift;
1642: $what=time.':'.$what;
1643: unless ($env{'request.course.id'}) { return ''; }
1644: $coursedombuf{$env{'request.course.id'}}=
1645: $env{'course.'.$env{'request.course.id'}.'.domain'};
1646: $coursenumbuf{$env{'request.course.id'}}=
1647: $env{'course.'.$env{'request.course.id'}.'.num'};
1648: $coursehombuf{$env{'request.course.id'}}=
1649: $env{'course.'.$env{'request.course.id'}.'.home'};
1650: $coursedescrbuf{$env{'request.course.id'}}=
1651: $env{'course.'.$env{'request.course.id'}.'.description'};
1652: $courseinstcodebuf{$env{'request.course.id'}}=
1653: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1654: $courseownerbuf{$env{'request.course.id'}}=
1655: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1656: if (defined $courselogs{$env{'request.course.id'}}) {
1657: $courselogs{$env{'request.course.id'}}.='&'.$what;
1658: } else {
1659: $courselogs{$env{'request.course.id'}}.=$what;
1660: }
1661: if (length($courselogs{$env{'request.course.id'}})>4048) {
1662: &flushcourselogs();
1663: }
1664: }
1665:
1666: sub courseacclog {
1667: my $fnsymb=shift;
1668: unless ($env{'request.course.id'}) { return ''; }
1669: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1670: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1671: $what.=':POST';
1672: # FIXME: Probably ought to escape things....
1673: foreach (keys %env) {
1674: if ($_=~/^form\.(.*)/) {
1675: $what.=':'.$1.'='.$env{$_};
1676: }
1677: }
1678: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1679: # FIXME: We should not be depending on a form parameter that someone
1680: # editing lonsearchcat.pm might change in the future.
1681: if ($env{'form.phase'} eq 'course_search') {
1682: $what.= ':POST';
1683: # FIXME: Probably ought to escape things....
1684: foreach my $element ('courseexp','crsfulltext','crsrelated',
1685: 'crsdiscuss') {
1686: $what.=':'.$element.'='.$env{'form.'.$element};
1687: }
1688: }
1689: }
1690: &courselog($what);
1691: }
1692:
1693: sub countacc {
1694: my $url=&declutter(shift);
1695: return if (! defined($url) || $url eq '');
1696: unless ($env{'request.course.id'}) { return ''; }
1697: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1698: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1699: $accesshash{$key}++;
1700: }
1701:
1702: sub linklog {
1703: my ($from,$to)=@_;
1704: $from=&declutter($from);
1705: $to=&declutter($to);
1706: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1707: $accesshash{$to.'___'.$from.'___goto'}=1;
1708: }
1709:
1710: sub userrolelog {
1711: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1712: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
1713: ($trole=~/^in/) || ($trole=~/^cc/) ||
1714: ($trole=~/^ep/) || ($trole=~/^cr/) ||
1715: ($trole=~/^ta/)) {
1716: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1717: $userrolehash
1718: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1719: =$tend.':'.$tstart;
1720: }
1721: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
1722: ($trole=~/^li/) || ($trole=~/^li/) ||
1723: ($trole=~/^au/) || ($trole=~/^dg/) ||
1724: ($trole=~/^sc/)) {
1725: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1726: $domainrolehash
1727: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1728: = $tend.':'.$tstart;
1729: }
1730: }
1731:
1732: sub get_course_adv_roles {
1733: my $cid=shift;
1734: $cid=$env{'request.course.id'} unless (defined($cid));
1735: my %coursehash=&coursedescription($cid);
1736: my %nothide=();
1737: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1738: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1739: }
1740: my %returnhash=();
1741: my %dumphash=
1742: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1743: my $now=time;
1744: foreach (keys %dumphash) {
1745: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1746: if (($tstart) && ($tstart<0)) { next; }
1747: if (($tend) && ($tend<$now)) { next; }
1748: if (($tstart) && ($now<$tstart)) { next; }
1749: my ($role,$username,$domain,$section)=split(/\:/,$_);
1750: if ($username eq '' || $domain eq '') { next; }
1751: if ((&privileged($username,$domain)) &&
1752: (!$nothide{$username.':'.$domain})) { next; }
1753: if ($role eq 'cr') { next; }
1754: my $key=&plaintext($role);
1755: if ($role =~ /^cr/) {
1756: $key=(split('/',$role))[3];
1757: }
1758: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1759: if ($returnhash{$key}) {
1760: $returnhash{$key}.=','.$username.':'.$domain;
1761: } else {
1762: $returnhash{$key}=$username.':'.$domain;
1763: }
1764: }
1765: return %returnhash;
1766: }
1767:
1768: sub get_my_roles {
1769: my ($uname,$udom)=@_;
1770: unless (defined($uname)) { $uname=$env{'user.name'}; }
1771: unless (defined($udom)) { $udom=$env{'user.domain'}; }
1772: my %dumphash=
1773: &dump('nohist_userroles',$udom,$uname);
1774: my %returnhash=();
1775: my $now=time;
1776: foreach (keys %dumphash) {
1777: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1778: if (($tstart) && ($tstart<0)) { next; }
1779: if (($tend) && ($tend<$now)) { next; }
1780: if (($tstart) && ($now<$tstart)) { next; }
1781: my ($role,$username,$domain,$section)=split(/\:/,$_);
1782: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1783: }
1784: return %returnhash;
1785: }
1786:
1787: # ----------------------------------------------------- Frontpage Announcements
1788: #
1789: #
1790:
1791: sub postannounce {
1792: my ($server,$text)=@_;
1793: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1794: unless ($text=~/\w/) { $text=''; }
1795: return &reply('setannounce:'.&escape($text),$server);
1796: }
1797:
1798: sub getannounce {
1799:
1800: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1801: my $announcement='';
1802: while (<$fh>) { $announcement .=$_; }
1803: close($fh);
1804: if ($announcement=~/\w/) {
1805: return
1806: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1807: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1808: } else {
1809: return '';
1810: }
1811: } else {
1812: return '';
1813: }
1814: }
1815:
1816: # ---------------------------------------------------------- Course ID routines
1817: # Deal with domain's nohist_courseid.db files
1818: #
1819:
1820: sub courseidput {
1821: my ($domain,$what,$coursehome)=@_;
1822: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1823: }
1824:
1825: sub courseiddump {
1826: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref)=@_;
1827: my %returnhash=();
1828: unless ($domfilter) { $domfilter=''; }
1829: foreach my $tryserver (keys %libserv) {
1830: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1831: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1832: foreach (
1833: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1834: $sincefilter.':'.&escape($descfilter).':'.
1835: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter),
1836: $tryserver))) {
1837: my ($key,$value)=split(/\=/,$_);
1838: if (($key) && ($value)) {
1839: $returnhash{&unescape($key)}=$value;
1840: }
1841: }
1842: }
1843: }
1844: }
1845: return %returnhash;
1846: }
1847:
1848: # ---------------------------------------------------------- DC e-mail
1849:
1850: sub dcmailput {
1851: my ($domain,$msgid,$contents,$server)=@_;
1852: my $status = &Apache::lonnet::critical(
1853: 'dcmailput:'.$domain.':'.&Apache::lonnet::escape($msgid).'='.
1854: &Apache::lonnet::escape($$contents{$server}),$server);
1855: return $status;
1856: }
1857:
1858: sub dcmaildump {
1859: my ($dom,$startdate,$enddate,$senders) = @_;
1860: my %returnhash=();
1861: foreach my $tryserver (keys(%libserv)) {
1862: if ($hostdom{$tryserver} eq $dom) {
1863: %{$returnhash{$tryserver}}=();
1864: my $cmd='dcmaildump:'.$dom.':'.
1865: &escape($startdate).':'.&escape($enddate).':';
1866: my @esc_senders=map { &escape($_)} @$senders;
1867: $cmd.=&escape(join('&',@esc_senders));
1868: foreach (split(/\&/,&reply($cmd,$tryserver))) {
1869: my ($key,$value) = split(/\=/,$_);
1870: if (($key) && ($value)) {
1871: $returnhash{$tryserver}{&unescape($key)} = &unescape($value);
1872: }
1873: }
1874: }
1875: }
1876: return %returnhash;
1877: }
1878: # ---------------------------------------------------------- Domain roles
1879:
1880: sub get_domain_roles {
1881: my ($dom,$roles,$startdate,$enddate)=@_;
1882: if (undef($startdate) || $startdate eq '') {
1883: $startdate = '.';
1884: }
1885: if (undef($enddate) || $enddate eq '') {
1886: $enddate = '.';
1887: }
1888: my $rolelist = join(':',@{$roles});
1889: my %personnel = ();
1890: foreach my $tryserver (keys(%libserv)) {
1891: if ($hostdom{$tryserver} eq $dom) {
1892: %{$personnel{$tryserver}}=();
1893: foreach (
1894: split(/\&/,&reply('domrolesdump:'.$dom.':'.
1895: &escape($startdate).':'.&escape($enddate).':'.
1896: &escape($rolelist), $tryserver))) {
1897: my($key,$value) = split(/\=/,$_);
1898: if (($key) && ($value)) {
1899: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
1900: }
1901: }
1902: }
1903: }
1904: return %personnel;
1905: }
1906:
1907: # ----------------------------------------------------------- Check out an item
1908:
1909: sub get_first_access {
1910: my ($type,$argsymb)=@_;
1911: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1912: if ($argsymb) { $symb=$argsymb; }
1913: my ($map,$id,$res)=&decode_symb($symb);
1914: if ($type eq 'map') {
1915: $res=&symbread($map);
1916: } else {
1917: $res=$symb;
1918: }
1919: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
1920: return $times{"$courseid\0$res"};
1921: }
1922:
1923: sub set_first_access {
1924: my ($type)=@_;
1925: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1926: my ($map,$id,$res)=&decode_symb($symb);
1927: if ($type eq 'map') {
1928: $res=&symbread($map);
1929: } else {
1930: $res=$symb;
1931: }
1932: my $firstaccess=&get_first_access($type,$symb);
1933: if (!$firstaccess) {
1934: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
1935: }
1936: return 'already_set';
1937: }
1938:
1939: sub checkout {
1940: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1941: my $now=time;
1942: my $lonhost=$perlvar{'lonHostID'};
1943: my $infostr=&escape(
1944: 'CHECKOUTTOKEN&'.
1945: $tuname.'&'.
1946: $tudom.'&'.
1947: $tcrsid.'&'.
1948: $symb.'&'.
1949: $now.'&'.$ENV{'REMOTE_ADDR'});
1950: my $token=&reply('tmpput:'.$infostr,$lonhost);
1951: if ($token=~/^error\:/) {
1952: &logthis("<font color=blue>WARNING: ".
1953: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1954: "</font>");
1955: return '';
1956: }
1957:
1958: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1959: $token=~tr/a-z/A-Z/;
1960:
1961: my %infohash=('resource.0.outtoken' => $token,
1962: 'resource.0.checkouttime' => $now,
1963: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1964:
1965: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1966: return '';
1967: } else {
1968: &logthis("<font color=blue>WARNING: ".
1969: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1970: "</font>");
1971: }
1972:
1973: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1974: &escape('Checkout '.$infostr.' - '.
1975: $token)) ne 'ok') {
1976: return '';
1977: } else {
1978: &logthis("<font color=blue>WARNING: ".
1979: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1980: "</font>");
1981: }
1982: return $token;
1983: }
1984:
1985: # ------------------------------------------------------------ Check in an item
1986:
1987: sub checkin {
1988: my $token=shift;
1989: my $now=time;
1990: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1991: $lonhost=~tr/A-Z/a-z/;
1992: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
1993: $dtoken=~s/\W/\_/g;
1994: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1995: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1996:
1997: unless (($tuname) && ($tudom)) {
1998: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1999: return '';
2000: }
2001:
2002: unless (&allowed('mgr',$tcrsid)) {
2003: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2004: $env{'user.name'}.' - '.$env{'user.domain'});
2005: return '';
2006: }
2007:
2008: my %infohash=('resource.0.intoken' => $token,
2009: 'resource.0.checkintime' => $now,
2010: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2011:
2012: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2013: return '';
2014: }
2015:
2016: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2017: &escape('Checkin - '.$token)) ne 'ok') {
2018: return '';
2019: }
2020:
2021: return ($symb,$tuname,$tudom,$tcrsid);
2022: }
2023:
2024: # --------------------------------------------- Set Expire Date for Spreadsheet
2025:
2026: sub expirespread {
2027: my ($uname,$udom,$stype,$usymb)=@_;
2028: my $cid=$env{'request.course.id'};
2029: if ($cid) {
2030: my $now=time;
2031: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2032: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2033: $env{'course.'.$cid.'.num'}.
2034: ':nohist_expirationdates:'.
2035: &escape($key).'='.$now,
2036: $env{'course.'.$cid.'.home'})
2037: }
2038: return 'ok';
2039: }
2040:
2041: # ----------------------------------------------------- Devalidate Spreadsheets
2042:
2043: sub devalidate {
2044: my ($symb,$uname,$udom)=@_;
2045: my $cid=$env{'request.course.id'};
2046: if ($cid) {
2047: # delete the stored spreadsheets for
2048: # - the student level sheet of this user in course's homespace
2049: # - the assessment level sheet for this resource
2050: # for this user in user's homespace
2051: # - current conditional state info
2052: my $key=$uname.':'.$udom.':';
2053: my $status=
2054: &del('nohist_calculatedsheets',
2055: [$key.'studentcalc:'],
2056: $env{'course.'.$cid.'.domain'},
2057: $env{'course.'.$cid.'.num'})
2058: .' '.
2059: &del('nohist_calculatedsheets_'.$cid,
2060: [$key.'assesscalc:'.$symb],$udom,$uname);
2061: unless ($status eq 'ok ok') {
2062: &logthis('Could not devalidate spreadsheet '.
2063: $uname.' at '.$udom.' for '.
2064: $symb.': '.$status);
2065: }
2066: &delenv('user.state.'.$cid);
2067: }
2068: }
2069:
2070: sub get_scalar {
2071: my ($string,$end) = @_;
2072: my $value;
2073: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2074: $value = $1;
2075: } elsif ($$string =~ s/^([^&]*?)&//) {
2076: $value = $1;
2077: }
2078: return &unescape($value);
2079: }
2080:
2081: sub array2str {
2082: my (@array) = @_;
2083: my $result=&arrayref2str(\@array);
2084: $result=~s/^__ARRAY_REF__//;
2085: $result=~s/__END_ARRAY_REF__$//;
2086: return $result;
2087: }
2088:
2089: sub arrayref2str {
2090: my ($arrayref) = @_;
2091: my $result='__ARRAY_REF__';
2092: foreach my $elem (@$arrayref) {
2093: if(ref($elem) eq 'ARRAY') {
2094: $result.=&arrayref2str($elem).'&';
2095: } elsif(ref($elem) eq 'HASH') {
2096: $result.=&hashref2str($elem).'&';
2097: } elsif(ref($elem)) {
2098: #print("Got a ref of ".(ref($elem))." skipping.");
2099: } else {
2100: $result.=&escape($elem).'&';
2101: }
2102: }
2103: $result=~s/\&$//;
2104: $result .= '__END_ARRAY_REF__';
2105: return $result;
2106: }
2107:
2108: sub hash2str {
2109: my (%hash) = @_;
2110: my $result=&hashref2str(\%hash);
2111: $result=~s/^__HASH_REF__//;
2112: $result=~s/__END_HASH_REF__$//;
2113: return $result;
2114: }
2115:
2116: sub hashref2str {
2117: my ($hashref)=@_;
2118: my $result='__HASH_REF__';
2119: foreach (sort(keys(%$hashref))) {
2120: if (ref($_) eq 'ARRAY') {
2121: $result.=&arrayref2str($_).'=';
2122: } elsif (ref($_) eq 'HASH') {
2123: $result.=&hashref2str($_).'=';
2124: } elsif (ref($_)) {
2125: $result.='=';
2126: #print("Got a ref of ".(ref($_))." skipping.");
2127: } else {
2128: if ($_) {$result.=&escape($_).'=';} else { last; }
2129: }
2130:
2131: if(ref($hashref->{$_}) eq 'ARRAY') {
2132: $result.=&arrayref2str($hashref->{$_}).'&';
2133: } elsif(ref($hashref->{$_}) eq 'HASH') {
2134: $result.=&hashref2str($hashref->{$_}).'&';
2135: } elsif(ref($hashref->{$_})) {
2136: $result.='&';
2137: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
2138: } else {
2139: $result.=&escape($hashref->{$_}).'&';
2140: }
2141: }
2142: $result=~s/\&$//;
2143: $result .= '__END_HASH_REF__';
2144: return $result;
2145: }
2146:
2147: sub str2hash {
2148: my ($string)=@_;
2149: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2150: return %$hash;
2151: }
2152:
2153: sub str2hashref {
2154: my ($string) = @_;
2155:
2156: my %hash;
2157:
2158: if($string !~ /^__HASH_REF__/) {
2159: if (! ($string eq '' || !defined($string))) {
2160: $hash{'error'}='Not hash reference';
2161: }
2162: return (\%hash, $string);
2163: }
2164:
2165: $string =~ s/^__HASH_REF__//;
2166:
2167: while($string !~ /^__END_HASH_REF__/) {
2168: #key
2169: my $key='';
2170: if($string =~ /^__HASH_REF__/) {
2171: ($key, $string)=&str2hashref($string);
2172: if(defined($key->{'error'})) {
2173: $hash{'error'}='Bad data';
2174: return (\%hash, $string);
2175: }
2176: } elsif($string =~ /^__ARRAY_REF__/) {
2177: ($key, $string)=&str2arrayref($string);
2178: if($key->[0] eq 'Array reference error') {
2179: $hash{'error'}='Bad data';
2180: return (\%hash, $string);
2181: }
2182: } else {
2183: $string =~ s/^(.*?)=//;
2184: $key=&unescape($1);
2185: }
2186: $string =~ s/^=//;
2187:
2188: #value
2189: my $value='';
2190: if($string =~ /^__HASH_REF__/) {
2191: ($value, $string)=&str2hashref($string);
2192: if(defined($value->{'error'})) {
2193: $hash{'error'}='Bad data';
2194: return (\%hash, $string);
2195: }
2196: } elsif($string =~ /^__ARRAY_REF__/) {
2197: ($value, $string)=&str2arrayref($string);
2198: if($value->[0] eq 'Array reference error') {
2199: $hash{'error'}='Bad data';
2200: return (\%hash, $string);
2201: }
2202: } else {
2203: $value=&get_scalar(\$string,'__END_HASH_REF__');
2204: }
2205: $string =~ s/^&//;
2206:
2207: $hash{$key}=$value;
2208: }
2209:
2210: $string =~ s/^__END_HASH_REF__//;
2211:
2212: return (\%hash, $string);
2213: }
2214:
2215: sub str2array {
2216: my ($string)=@_;
2217: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2218: return @$array;
2219: }
2220:
2221: sub str2arrayref {
2222: my ($string) = @_;
2223: my @array;
2224:
2225: if($string !~ /^__ARRAY_REF__/) {
2226: if (! ($string eq '' || !defined($string))) {
2227: $array[0]='Array reference error';
2228: }
2229: return (\@array, $string);
2230: }
2231:
2232: $string =~ s/^__ARRAY_REF__//;
2233:
2234: while($string !~ /^__END_ARRAY_REF__/) {
2235: my $value='';
2236: if($string =~ /^__HASH_REF__/) {
2237: ($value, $string)=&str2hashref($string);
2238: if(defined($value->{'error'})) {
2239: $array[0] ='Array reference error';
2240: return (\@array, $string);
2241: }
2242: } elsif($string =~ /^__ARRAY_REF__/) {
2243: ($value, $string)=&str2arrayref($string);
2244: if($value->[0] eq 'Array reference error') {
2245: $array[0] ='Array reference error';
2246: return (\@array, $string);
2247: }
2248: } else {
2249: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2250: }
2251: $string =~ s/^&//;
2252:
2253: push(@array, $value);
2254: }
2255:
2256: $string =~ s/^__END_ARRAY_REF__//;
2257:
2258: return (\@array, $string);
2259: }
2260:
2261: # -------------------------------------------------------------------Temp Store
2262:
2263: sub tmpreset {
2264: my ($symb,$namespace,$domain,$stuname) = @_;
2265: if (!$symb) {
2266: $symb=&symbread();
2267: if (!$symb) { $symb= $env{'request.url'}; }
2268: }
2269: $symb=escape($symb);
2270:
2271: if (!$namespace) { $namespace=$env{'request.state'}; }
2272: $namespace=~s/\//\_/g;
2273: $namespace=~s/\W//g;
2274:
2275: if (!$domain) { $domain=$env{'user.domain'}; }
2276: if (!$stuname) { $stuname=$env{'user.name'}; }
2277: if ($domain eq 'public' && $stuname eq 'public') {
2278: $stuname=$ENV{'REMOTE_ADDR'};
2279: }
2280: my $path=$perlvar{'lonDaemons'}.'/tmp';
2281: my %hash;
2282: if (tie(%hash,'GDBM_File',
2283: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2284: &GDBM_WRCREAT(),0640)) {
2285: foreach my $key (keys %hash) {
2286: if ($key=~ /:$symb/) {
2287: delete($hash{$key});
2288: }
2289: }
2290: }
2291: }
2292:
2293: sub tmpstore {
2294: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2295:
2296: if (!$symb) {
2297: $symb=&symbread();
2298: if (!$symb) { $symb= $env{'request.url'}; }
2299: }
2300: $symb=escape($symb);
2301:
2302: if (!$namespace) {
2303: # I don't think we would ever want to store this for a course.
2304: # it seems this will only be used if we don't have a course.
2305: #$namespace=$env{'request.course.id'};
2306: #if (!$namespace) {
2307: $namespace=$env{'request.state'};
2308: #}
2309: }
2310: $namespace=~s/\//\_/g;
2311: $namespace=~s/\W//g;
2312: if (!$domain) { $domain=$env{'user.domain'}; }
2313: if (!$stuname) { $stuname=$env{'user.name'}; }
2314: if ($domain eq 'public' && $stuname eq 'public') {
2315: $stuname=$ENV{'REMOTE_ADDR'};
2316: }
2317: my $now=time;
2318: my %hash;
2319: my $path=$perlvar{'lonDaemons'}.'/tmp';
2320: if (tie(%hash,'GDBM_File',
2321: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2322: &GDBM_WRCREAT(),0640)) {
2323: $hash{"version:$symb"}++;
2324: my $version=$hash{"version:$symb"};
2325: my $allkeys='';
2326: foreach my $key (keys(%$storehash)) {
2327: $allkeys.=$key.':';
2328: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2329: }
2330: $hash{"$version:$symb:timestamp"}=$now;
2331: $allkeys.='timestamp';
2332: $hash{"$version:keys:$symb"}=$allkeys;
2333: if (untie(%hash)) {
2334: return 'ok';
2335: } else {
2336: return "error:$!";
2337: }
2338: } else {
2339: return "error:$!";
2340: }
2341: }
2342:
2343: # -----------------------------------------------------------------Temp Restore
2344:
2345: sub tmprestore {
2346: my ($symb,$namespace,$domain,$stuname) = @_;
2347:
2348: if (!$symb) {
2349: $symb=&symbread();
2350: if (!$symb) { $symb= $env{'request.url'}; }
2351: }
2352: $symb=escape($symb);
2353:
2354: if (!$namespace) { $namespace=$env{'request.state'}; }
2355:
2356: if (!$domain) { $domain=$env{'user.domain'}; }
2357: if (!$stuname) { $stuname=$env{'user.name'}; }
2358: if ($domain eq 'public' && $stuname eq 'public') {
2359: $stuname=$ENV{'REMOTE_ADDR'};
2360: }
2361: my %returnhash;
2362: $namespace=~s/\//\_/g;
2363: $namespace=~s/\W//g;
2364: my %hash;
2365: my $path=$perlvar{'lonDaemons'}.'/tmp';
2366: if (tie(%hash,'GDBM_File',
2367: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2368: &GDBM_READER(),0640)) {
2369: my $version=$hash{"version:$symb"};
2370: $returnhash{'version'}=$version;
2371: my $scope;
2372: for ($scope=1;$scope<=$version;$scope++) {
2373: my $vkeys=$hash{"$scope:keys:$symb"};
2374: my @keys=split(/:/,$vkeys);
2375: my $key;
2376: $returnhash{"$scope:keys"}=$vkeys;
2377: foreach $key (@keys) {
2378: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2379: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2380: }
2381: }
2382: if (!(untie(%hash))) {
2383: return "error:$!";
2384: }
2385: } else {
2386: return "error:$!";
2387: }
2388: return %returnhash;
2389: }
2390:
2391: # ----------------------------------------------------------------------- Store
2392:
2393: sub store {
2394: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2395: my $home='';
2396:
2397: if ($stuname) { $home=&homeserver($stuname,$domain); }
2398:
2399: $symb=&symbclean($symb);
2400: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2401:
2402: if (!$domain) { $domain=$env{'user.domain'}; }
2403: if (!$stuname) { $stuname=$env{'user.name'}; }
2404:
2405: &devalidate($symb,$stuname,$domain);
2406:
2407: $symb=escape($symb);
2408: if (!$namespace) {
2409: unless ($namespace=$env{'request.course.id'}) {
2410: return '';
2411: }
2412: }
2413: if (!$home) { $home=$env{'user.home'}; }
2414:
2415: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2416: $$storehash{'host'}=$perlvar{'lonHostID'};
2417:
2418: my $namevalue='';
2419: foreach (keys %$storehash) {
2420: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2421: }
2422: $namevalue=~s/\&$//;
2423: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2424: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2425: }
2426:
2427: # -------------------------------------------------------------- Critical Store
2428:
2429: sub cstore {
2430: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2431: my $home='';
2432:
2433: if ($stuname) { $home=&homeserver($stuname,$domain); }
2434:
2435: $symb=&symbclean($symb);
2436: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2437:
2438: if (!$domain) { $domain=$env{'user.domain'}; }
2439: if (!$stuname) { $stuname=$env{'user.name'}; }
2440:
2441: &devalidate($symb,$stuname,$domain);
2442:
2443: $symb=escape($symb);
2444: if (!$namespace) {
2445: unless ($namespace=$env{'request.course.id'}) {
2446: return '';
2447: }
2448: }
2449: if (!$home) { $home=$env{'user.home'}; }
2450:
2451: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2452: $$storehash{'host'}=$perlvar{'lonHostID'};
2453:
2454: my $namevalue='';
2455: foreach (keys %$storehash) {
2456: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2457: }
2458: $namevalue=~s/\&$//;
2459: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2460: return critical
2461: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2462: }
2463:
2464: # --------------------------------------------------------------------- Restore
2465:
2466: sub restore {
2467: my ($symb,$namespace,$domain,$stuname) = @_;
2468: my $home='';
2469:
2470: if ($stuname) { $home=&homeserver($stuname,$domain); }
2471:
2472: if (!$symb) {
2473: unless ($symb=escape(&symbread())) { return ''; }
2474: } else {
2475: $symb=&escape(&symbclean($symb));
2476: }
2477: if (!$namespace) {
2478: unless ($namespace=$env{'request.course.id'}) {
2479: return '';
2480: }
2481: }
2482: if (!$domain) { $domain=$env{'user.domain'}; }
2483: if (!$stuname) { $stuname=$env{'user.name'}; }
2484: if (!$home) { $home=$env{'user.home'}; }
2485: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2486:
2487: my %returnhash=();
2488: foreach (split(/\&/,$answer)) {
2489: my ($name,$value)=split(/\=/,$_);
2490: $returnhash{&unescape($name)}=&thaw_unescape($value);
2491: }
2492: my $version;
2493: for ($version=1;$version<=$returnhash{'version'};$version++) {
2494: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2495: $returnhash{$_}=$returnhash{$version.':'.$_};
2496: }
2497: }
2498: return %returnhash;
2499: }
2500:
2501: # ---------------------------------------------------------- Course Description
2502:
2503: sub coursedescription {
2504: my $courseid=shift;
2505: $courseid=~s/^\///;
2506: $courseid=~s/\_/\//g;
2507: my ($cdomain,$cnum)=split(/\//,$courseid);
2508: my $chome=&homeserver($cnum,$cdomain);
2509: my $normalid=$cdomain.'_'.$cnum;
2510: # need to always cache even if we get errors otherwise we keep
2511: # trying and trying and trying to get the course description.
2512: my %envhash=();
2513: my %returnhash=();
2514: $envhash{'course.'.$normalid.'.last_cache'}=time;
2515: if ($chome ne 'no_host') {
2516: %returnhash=&dump('environment',$cdomain,$cnum);
2517: if (!exists($returnhash{'con_lost'})) {
2518: $returnhash{'home'}= $chome;
2519: $returnhash{'domain'} = $cdomain;
2520: $returnhash{'num'} = $cnum;
2521: while (my ($name,$value) = each %returnhash) {
2522: $envhash{'course.'.$normalid.'.'.$name}=$value;
2523: }
2524: $returnhash{'url'}=&clutter($returnhash{'url'});
2525: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2526: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2527: $envhash{'course.'.$normalid.'.home'}=$chome;
2528: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2529: $envhash{'course.'.$normalid.'.num'}=$cnum;
2530: }
2531: }
2532: &appenv(%envhash);
2533: return %returnhash;
2534: }
2535:
2536: # -------------------------------------------------See if a user is privileged
2537:
2538: sub privileged {
2539: my ($username,$domain)=@_;
2540: my $rolesdump=&reply("dump:$domain:$username:roles",
2541: &homeserver($username,$domain));
2542: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2543: my $now=time;
2544: if ($rolesdump ne '') {
2545: foreach (split(/&/,$rolesdump)) {
2546: if ($_!~/^rolesdef_/) {
2547: my ($area,$role)=split(/=/,$_);
2548: $area=~s/\_\w\w$//;
2549: my ($trole,$tend,$tstart)=split(/_/,$role);
2550: if (($trole eq 'dc') || ($trole eq 'su')) {
2551: my $active=1;
2552: if ($tend) {
2553: if ($tend<$now) { $active=0; }
2554: }
2555: if ($tstart) {
2556: if ($tstart>$now) { $active=0; }
2557: }
2558: if ($active) { return 1; }
2559: }
2560: }
2561: }
2562: }
2563: return 0;
2564: }
2565:
2566: # -------------------------------------------------------- Get user privileges
2567:
2568: sub rolesinit {
2569: my ($domain,$username,$authhost)=@_;
2570: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2571: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2572: my %allroles=();
2573: my $now=time;
2574: my $userroles="user.login.time=$now\n";
2575:
2576: if ($rolesdump ne '') {
2577: foreach (split(/&/,$rolesdump)) {
2578: if ($_!~/^rolesdef_/) {
2579: my ($area,$role)=split(/=/,$_);
2580: $area=~s/\_\w\w$//;
2581: my ($trole,$tend,$tstart);
2582: if ($role=~/^cr/) {
2583: if ($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|) {
2584: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2585: ($tend,$tstart)=split('_',$trest);
2586: } else {
2587: $trole=$role;
2588: }
2589: } else {
2590: ($trole,$tend,$tstart)=split(/_/,$role);
2591: }
2592: $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username);
2593: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2594: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2595: if (($area ne '') && ($trole ne '')) {
2596: my $spec=$trole.'.'.$area;
2597: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2598: if ($trole =~ /^cr\//) {
2599: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2600: } else {
2601: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2602: }
2603: }
2604: }
2605: }
2606: my ($author,$adv) = &set_userprivs(\$userroles,\%allroles);
2607: $userroles.='user.adv='.$adv."\n".
2608: 'user.author='.$author."\n";
2609: $env{'user.adv'}=$adv;
2610: }
2611: return $userroles;
2612: }
2613:
2614: sub set_arearole {
2615: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2616: # log the associated role with the area
2617: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2618: return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
2619: }
2620:
2621: sub custom_roleprivs {
2622: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2623: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2624: my $homsvr=homeserver($rauthor,$rdomain);
2625: if ($hostname{$homsvr} ne '') {
2626: my ($rdummy,$roledef)=
2627: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2628: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2629: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2630: if (defined($syspriv)) {
2631: $$allroles{'cm./'}.=':'.$syspriv;
2632: $$allroles{$spec.'./'}.=':'.$syspriv;
2633: }
2634: if ($tdomain ne '') {
2635: if (defined($dompriv)) {
2636: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2637: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2638: }
2639: if (($trest ne '') && (defined($coursepriv))) {
2640: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2641: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2642: }
2643: }
2644: }
2645: }
2646: }
2647:
2648:
2649: sub standard_roleprivs {
2650: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2651: if (defined($pr{$trole.':s'})) {
2652: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2653: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2654: }
2655: if ($tdomain ne '') {
2656: if (defined($pr{$trole.':d'})) {
2657: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2658: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2659: }
2660: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2661: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2662: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2663: }
2664: }
2665: }
2666:
2667: sub set_userprivs {
2668: my ($userroles,$allroles) = @_;
2669: my $author=0;
2670: my $adv=0;
2671: foreach (keys %{$allroles}) {
2672: my %thesepriv=();
2673: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2674: foreach (split(/:/,$$allroles{$_})) {
2675: if ($_ ne '') {
2676: my ($privilege,$restrictions)=split(/&/,$_);
2677: if ($restrictions eq '') {
2678: $thesepriv{$privilege}='F';
2679: } elsif ($thesepriv{$privilege} ne 'F') {
2680: $thesepriv{$privilege}.=$restrictions;
2681: }
2682: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2683: }
2684: }
2685: my $thesestr='';
2686: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2687: $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
2688: }
2689: return ($author,$adv);
2690: }
2691:
2692: # --------------------------------------------------------------- get interface
2693:
2694: sub get {
2695: my ($namespace,$storearr,$udomain,$uname)=@_;
2696: my $items='';
2697: foreach (@$storearr) {
2698: $items.=escape($_).'&';
2699: }
2700: $items=~s/\&$//;
2701: if (!$udomain) { $udomain=$env{'user.domain'}; }
2702: if (!$uname) { $uname=$env{'user.name'}; }
2703: my $uhome=&homeserver($uname,$udomain);
2704:
2705: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2706: my @pairs=split(/\&/,$rep);
2707: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2708: return @pairs;
2709: }
2710: my %returnhash=();
2711: my $i=0;
2712: foreach (@$storearr) {
2713: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2714: $i++;
2715: }
2716: return %returnhash;
2717: }
2718:
2719: # --------------------------------------------------------------- del interface
2720:
2721: sub del {
2722: my ($namespace,$storearr,$udomain,$uname)=@_;
2723: my $items='';
2724: foreach (@$storearr) {
2725: $items.=escape($_).'&';
2726: }
2727: $items=~s/\&$//;
2728: if (!$udomain) { $udomain=$env{'user.domain'}; }
2729: if (!$uname) { $uname=$env{'user.name'}; }
2730: my $uhome=&homeserver($uname,$udomain);
2731:
2732: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2733: }
2734:
2735: # -------------------------------------------------------------- dump interface
2736:
2737: sub dump {
2738: my ($namespace,$udomain,$uname,$regexp)=@_;
2739: if (!$udomain) { $udomain=$env{'user.domain'}; }
2740: if (!$uname) { $uname=$env{'user.name'}; }
2741: my $uhome=&homeserver($uname,$udomain);
2742: if ($regexp) {
2743: $regexp=&escape($regexp);
2744: } else {
2745: $regexp='.';
2746: }
2747: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2748: my @pairs=split(/\&/,$rep);
2749: my %returnhash=();
2750: foreach (@pairs) {
2751: my ($key,$value)=split(/=/,$_);
2752: $returnhash{unescape($key)}=&thaw_unescape($value);
2753: }
2754: return %returnhash;
2755: }
2756:
2757: # -------------------------------------------------------------- keys interface
2758:
2759: sub getkeys {
2760: my ($namespace,$udomain,$uname)=@_;
2761: if (!$udomain) { $udomain=$env{'user.domain'}; }
2762: if (!$uname) { $uname=$env{'user.name'}; }
2763: my $uhome=&homeserver($uname,$udomain);
2764: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2765: my @keyarray=();
2766: foreach (split(/\&/,$rep)) {
2767: push (@keyarray,&unescape($_));
2768: }
2769: return @keyarray;
2770: }
2771:
2772: # --------------------------------------------------------------- currentdump
2773: sub currentdump {
2774: my ($courseid,$sdom,$sname)=@_;
2775: $courseid = $env{'request.course.id'} if (! defined($courseid));
2776: $sdom = $env{'user.domain'} if (! defined($sdom));
2777: $sname = $env{'user.name'} if (! defined($sname));
2778: my $uhome = &homeserver($sname,$sdom);
2779: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2780: return if ($rep =~ /^(error:|no_such_host)/);
2781: #
2782: my %returnhash=();
2783: #
2784: if ($rep eq "unknown_cmd") {
2785: # an old lond will not know currentdump
2786: # Do a dump and make it look like a currentdump
2787: my @tmp = &dump($courseid,$sdom,$sname,'.');
2788: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2789: my %hash = @tmp;
2790: @tmp=();
2791: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2792: } else {
2793: my @pairs=split(/\&/,$rep);
2794: foreach (@pairs) {
2795: my ($key,$value)=split(/=/,$_);
2796: my ($symb,$param) = split(/:/,$key);
2797: $returnhash{&unescape($symb)}->{&unescape($param)} =
2798: &thaw_unescape($value);
2799: }
2800: }
2801: return %returnhash;
2802: }
2803:
2804: sub convert_dump_to_currentdump{
2805: my %hash = %{shift()};
2806: my %returnhash;
2807: # Code ripped from lond, essentially. The only difference
2808: # here is the unescaping done by lonnet::dump(). Conceivably
2809: # we might run in to problems with parameter names =~ /^v\./
2810: while (my ($key,$value) = each(%hash)) {
2811: my ($v,$symb,$param) = split(/:/,$key);
2812: next if ($v eq 'version' || $symb eq 'keys');
2813: next if (exists($returnhash{$symb}) &&
2814: exists($returnhash{$symb}->{$param}) &&
2815: $returnhash{$symb}->{'v.'.$param} > $v);
2816: $returnhash{$symb}->{$param}=$value;
2817: $returnhash{$symb}->{'v.'.$param}=$v;
2818: }
2819: #
2820: # Remove all of the keys in the hashes which keep track of
2821: # the version of the parameter.
2822: while (my ($symb,$param_hash) = each(%returnhash)) {
2823: # use a foreach because we are going to delete from the hash.
2824: foreach my $key (keys(%$param_hash)) {
2825: delete($param_hash->{$key}) if ($key =~ /^v\./);
2826: }
2827: }
2828: return \%returnhash;
2829: }
2830:
2831: # ------------------------------------------------------ critical inc interface
2832:
2833: sub cinc {
2834: return &inc(@_,'critical');
2835: }
2836:
2837: # --------------------------------------------------------------- inc interface
2838:
2839: sub inc {
2840: my ($namespace,$store,$udomain,$uname,$critical) = @_;
2841: if (!$udomain) { $udomain=$env{'user.domain'}; }
2842: if (!$uname) { $uname=$env{'user.name'}; }
2843: my $uhome=&homeserver($uname,$udomain);
2844: my $items='';
2845: if (! ref($store)) {
2846: # got a single value, so use that instead
2847: $items = &escape($store).'=&';
2848: } elsif (ref($store) eq 'SCALAR') {
2849: $items = &escape($$store).'=&';
2850: } elsif (ref($store) eq 'ARRAY') {
2851: $items = join('=&',map {&escape($_);} @{$store});
2852: } elsif (ref($store) eq 'HASH') {
2853: while (my($key,$value) = each(%{$store})) {
2854: $items.= &escape($key).'='.&escape($value).'&';
2855: }
2856: }
2857: $items=~s/\&$//;
2858: if ($critical) {
2859: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
2860: } else {
2861: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2862: }
2863: }
2864:
2865: # --------------------------------------------------------------- put interface
2866:
2867: sub put {
2868: my ($namespace,$storehash,$udomain,$uname)=@_;
2869: if (!$udomain) { $udomain=$env{'user.domain'}; }
2870: if (!$uname) { $uname=$env{'user.name'}; }
2871: my $uhome=&homeserver($uname,$udomain);
2872: my $items='';
2873: foreach (keys %$storehash) {
2874: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2875: }
2876: $items=~s/\&$//;
2877: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2878: }
2879:
2880: # ------------------------------------------------------------ newput interface
2881:
2882: sub newput {
2883: my ($namespace,$storehash,$udomain,$uname)=@_;
2884: if (!$udomain) { $udomain=$env{'user.domain'}; }
2885: if (!$uname) { $uname=$env{'user.name'}; }
2886: my $uhome=&homeserver($uname,$udomain);
2887: my $items='';
2888: foreach my $key (keys(%$storehash)) {
2889: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
2890: }
2891: $items=~s/\&$//;
2892: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
2893: }
2894:
2895: # --------------------------------------------------------- putstore interface
2896:
2897: sub putstore {
2898: my ($namespace,$storehash,$udomain,$uname)=@_;
2899: if (!$udomain) { $udomain=$env{'user.domain'}; }
2900: if (!$uname) { $uname=$env{'user.name'}; }
2901: my $uhome=&homeserver($uname,$udomain);
2902: my $items='';
2903: my %allitems = ();
2904: foreach (keys %$storehash) {
2905: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
2906: my $key = $1.':keys:'.$2;
2907: $allitems{$key} .= $3.':';
2908: }
2909: $items.=$_.'='.&freeze_escape($$storehash{$_}).'&';
2910: }
2911: foreach (keys %allitems) {
2912: $allitems{$_} =~ s/\:$//;
2913: $items.= $_.'='.$allitems{$_}.'&';
2914: }
2915: $items=~s/\&$//;
2916: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2917: }
2918:
2919: # ------------------------------------------------------ critical put interface
2920:
2921: sub cput {
2922: my ($namespace,$storehash,$udomain,$uname)=@_;
2923: if (!$udomain) { $udomain=$env{'user.domain'}; }
2924: if (!$uname) { $uname=$env{'user.name'}; }
2925: my $uhome=&homeserver($uname,$udomain);
2926: my $items='';
2927: foreach (keys %$storehash) {
2928: $items.=escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2929: }
2930: $items=~s/\&$//;
2931: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2932: }
2933:
2934: # -------------------------------------------------------------- eget interface
2935:
2936: sub eget {
2937: my ($namespace,$storearr,$udomain,$uname)=@_;
2938: my $items='';
2939: foreach (@$storearr) {
2940: $items.=escape($_).'&';
2941: }
2942: $items=~s/\&$//;
2943: if (!$udomain) { $udomain=$env{'user.domain'}; }
2944: if (!$uname) { $uname=$env{'user.name'}; }
2945: my $uhome=&homeserver($uname,$udomain);
2946: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2947: my @pairs=split(/\&/,$rep);
2948: my %returnhash=();
2949: my $i=0;
2950: foreach (@$storearr) {
2951: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2952: $i++;
2953: }
2954: return %returnhash;
2955: }
2956:
2957: # ------------------------------------------------------------ tmpput interface
2958: sub tmpput {
2959: my ($storehash,$server)=@_;
2960: my $items='';
2961: foreach (keys(%$storehash)) {
2962: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2963: }
2964: $items=~s/\&$//;
2965: return &reply("tmpput:$items",$server);
2966: }
2967:
2968: # ------------------------------------------------------------ tmpget interface
2969: sub tmpget {
2970: my ($token)=@_;
2971: my $rep=&reply("tmpget:$token",$perlvar{'lonHostID'});
2972: my %returnhash;
2973: foreach my $item (split(/\&/,$rep)) {
2974: my ($key,$value)=split(/=/,$item);
2975: $returnhash{&unescape($key)}=&thaw_unescape($value);
2976: }
2977: return %returnhash;
2978: }
2979:
2980: # ---------------------------------------------- Custom access rule evaluation
2981:
2982: sub customaccess {
2983: my ($priv,$uri)=@_;
2984: my ($urole,$urealm)=split(/\./,$env{'request.role'});
2985: $urealm=~s/^\W//;
2986: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2987: my $access=0;
2988: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2989: my ($effect,$realm,$role)=split(/\:/,$_);
2990: if ($role) {
2991: if ($role ne $urole) { next; }
2992: }
2993: foreach (split(/\s*\,\s*/,$realm)) {
2994: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2995: if ($tdom) {
2996: if ($tdom ne $udom) { next; }
2997: }
2998: if ($tcrs) {
2999: if ($tcrs ne $ucrs) { next; }
3000: }
3001: if ($tsec) {
3002: if ($tsec ne $usec) { next; }
3003: }
3004: $access=($effect eq 'allow');
3005: last;
3006: }
3007: if ($realm eq '' && $role eq '') {
3008: $access=($effect eq 'allow');
3009: }
3010: }
3011: return $access;
3012: }
3013:
3014: # ------------------------------------------------- Check for a user privilege
3015:
3016: sub allowed {
3017: my ($priv,$uri,$symb)=@_;
3018: $uri=&deversion($uri);
3019: my $orguri=$uri;
3020: $uri=&declutter($uri);
3021:
3022:
3023:
3024: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3025: # Free bre access to adm and meta resources
3026: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
3027: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
3028: return 'F';
3029: }
3030:
3031: # Free bre access to user's own portfolio contents
3032: my ($space,$domain,$name,$dir)=split('/',$uri);
3033: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3034: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
3035: return 'F';
3036: }
3037:
3038: # Free bre to public access
3039:
3040: if ($priv eq 'bre') {
3041: my $copyright=&metadata($uri,'copyright');
3042: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3043: return 'F';
3044: }
3045: if ($copyright eq 'priv') {
3046: $uri=~/([^\/]+)\/([^\/]+)\//;
3047: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3048: return '';
3049: }
3050: }
3051: if ($copyright eq 'domain') {
3052: $uri=~/([^\/]+)\/([^\/]+)\//;
3053: unless (($env{'user.domain'} eq $1) ||
3054: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3055: return '';
3056: }
3057: }
3058: if ($env{'request.role'}=~ /li\.\//) {
3059: # Library role, so allow browsing of resources in this domain.
3060: return 'F';
3061: }
3062: if ($copyright eq 'custom') {
3063: unless (&customaccess($priv,$uri)) { return ''; }
3064: }
3065: }
3066: # Domain coordinator is trying to create a course
3067: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3068: # uri is the requested domain in this case.
3069: # comparison to 'request.role.domain' shows if the user has selected
3070: # a role of dc for the domain in question.
3071: return 'F' if ($uri eq $env{'request.role.domain'});
3072: }
3073:
3074: my $thisallowed='';
3075: my $statecond=0;
3076: my $courseprivid='';
3077:
3078: # Course
3079:
3080: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3081: $thisallowed.=$1;
3082: }
3083:
3084: # Domain
3085:
3086: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3087: =~/\Q$priv\E\&([^\:]*)/) {
3088: $thisallowed.=$1;
3089: }
3090:
3091: # Course: uri itself is a course
3092: my $courseuri=$uri;
3093: $courseuri=~s/\_(\d)/\/$1/;
3094: $courseuri=~s/^([^\/])/\/$1/;
3095:
3096: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3097: =~/\Q$priv\E\&([^\:]*)/) {
3098: $thisallowed.=$1;
3099: }
3100:
3101: # URI is an uploaded document for this course, default permissions don't matter
3102: # not allowing 'edit' access (editupload) to uploaded course docs
3103: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3104: $thisallowed='';
3105: my $refuri=$env{'httpref.'.$orguri};
3106: if ($refuri) {
3107: if ($refuri =~ m|^/adm/|) {
3108: $thisallowed='F';
3109: }
3110: }
3111: }
3112:
3113: # Full access at system, domain or course-wide level? Exit.
3114:
3115: if ($thisallowed=~/F/) {
3116: return 'F';
3117: }
3118:
3119: # If this is generating or modifying users, exit with special codes
3120:
3121: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3122: if (($priv eq 'cca') || ($priv eq 'caa')) {
3123: my ($audom,$auname)=split('/',$uri);
3124: # no author name given, so this just checks on the general right to make a co-author in this domain
3125: unless ($auname) { return $thisallowed; }
3126: # an author name is given, so we are about to actually make a co-author for a certain account
3127: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3128: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3129: ($audom ne $env{'request.role.domain'}))) { return ''; }
3130: }
3131: return $thisallowed;
3132: }
3133: #
3134: # Gathered so far: system, domain and course wide privileges
3135: #
3136: # Course: See if uri or referer is an individual resource that is part of
3137: # the course
3138:
3139: if ($env{'request.course.id'}) {
3140:
3141: $courseprivid=$env{'request.course.id'};
3142: if ($env{'request.course.sec'}) {
3143: $courseprivid.='/'.$env{'request.course.sec'};
3144: }
3145: $courseprivid=~s/\_/\//;
3146: my $checkreferer=1;
3147: my ($match,$cond)=&is_on_map($uri);
3148: if ($match) {
3149: $statecond=$cond;
3150: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3151: =~/\Q$priv\E\&([^\:]*)/) {
3152: $thisallowed.=$1;
3153: $checkreferer=0;
3154: }
3155: }
3156:
3157: if ($checkreferer) {
3158: my $refuri=$env{'httpref.'.$orguri};
3159: unless ($refuri) {
3160: foreach (keys %env) {
3161: if ($_=~/^httpref\..*\*/) {
3162: my $pattern=$_;
3163: $pattern=~s/^httpref\.\/res\///;
3164: $pattern=~s/\*/\[\^\/\]\+/g;
3165: $pattern=~s/\//\\\//g;
3166: if ($orguri=~/$pattern/) {
3167: $refuri=$env{$_};
3168: }
3169: }
3170: }
3171: }
3172:
3173: if ($refuri) {
3174: $refuri=&declutter($refuri);
3175: my ($match,$cond)=&is_on_map($refuri);
3176: if ($match) {
3177: my $refstatecond=$cond;
3178: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3179: =~/\Q$priv\E\&([^\:]*)/) {
3180: $thisallowed.=$1;
3181: $uri=$refuri;
3182: $statecond=$refstatecond;
3183: }
3184: }
3185: }
3186: }
3187: }
3188:
3189: #
3190: # Gathered now: all privileges that could apply, and condition number
3191: #
3192: #
3193: # Full or no access?
3194: #
3195:
3196: if ($thisallowed=~/F/) {
3197: return 'F';
3198: }
3199:
3200: unless ($thisallowed) {
3201: return '';
3202: }
3203:
3204: # Restrictions exist, deal with them
3205: #
3206: # C:according to course preferences
3207: # R:according to resource settings
3208: # L:unless locked
3209: # X:according to user session state
3210: #
3211:
3212: # Possibly locked functionality, check all courses
3213: # Locks might take effect only after 10 minutes cache expiration for other
3214: # courses, and 2 minutes for current course
3215:
3216: my $envkey;
3217: if ($thisallowed=~/L/) {
3218: foreach $envkey (keys %env) {
3219: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3220: my $courseid=$2;
3221: my $roleid=$1.'.'.$2;
3222: $courseid=~s/^\///;
3223: my $expiretime=600;
3224: if ($env{'request.role'} eq $roleid) {
3225: $expiretime=120;
3226: }
3227: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3228: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3229: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3230: &coursedescription($courseid);
3231: }
3232: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3233: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3234: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3235: &log($env{'user.domain'},$env{'user.name'},
3236: $env{'user.home'},
3237: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3238: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3239: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3240: return '';
3241: }
3242: }
3243: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3244: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3245: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3246: &log($env{'user.domain'},$env{'user.name'},
3247: $env{'user.home'},
3248: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3249: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3250: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3251: return '';
3252: }
3253: }
3254: }
3255: }
3256: }
3257:
3258: #
3259: # Rest of the restrictions depend on selected course
3260: #
3261:
3262: unless ($env{'request.course.id'}) {
3263: return '1';
3264: }
3265:
3266: #
3267: # Now user is definitely in a course
3268: #
3269:
3270:
3271: # Course preferences
3272:
3273: if ($thisallowed=~/C/) {
3274: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3275: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
3276: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
3277: =~/\Q$rolecode\E/) {
3278: &log($env{'user.domain'},$env{'user.name'},$env{'user.host'},
3279: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3280: $env{'request.course.id'});
3281: return '';
3282: }
3283:
3284: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
3285: =~/\Q$unamedom\E/) {
3286: &log($env{'user.domain'},$env{'user.name'},$env{'user.host'},
3287: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3288: $env{'request.course.id'});
3289: return '';
3290: }
3291: }
3292:
3293: # Resource preferences
3294:
3295: if ($thisallowed=~/R/) {
3296: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3297: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3298: &log($env{'user.domain'},$env{'user.name'},$env{'user.host'},
3299: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3300: return '';
3301: }
3302: }
3303:
3304: # Restricted by state or randomout?
3305:
3306: if ($thisallowed=~/X/) {
3307: if ($env{'acc.randomout'}) {
3308: if (!$symb) { $symb=&symbread($uri,1); }
3309: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3310: return '';
3311: }
3312: }
3313: if (&condval($statecond)) {
3314: return '2';
3315: } else {
3316: return '';
3317: }
3318: }
3319:
3320: return 'F';
3321: }
3322:
3323: # --------------------------------------------------- Is a resource on the map?
3324:
3325: sub is_on_map {
3326: my $uri=&deversion(&declutter(shift));
3327: my @uriparts=split(/\//,$uri);
3328: my $filename=$uriparts[$#uriparts];
3329: my $pathname=$uri;
3330: $pathname=~s|/\Q$filename\E$||;
3331: $pathname=~s/^adm\/wrapper\///;
3332: #Trying to find the conditional for the file
3333: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3334: /\&\Q$filename\E\:([\d\|]+)\&/);
3335: if ($match) {
3336: return (1,$1);
3337: } else {
3338: return (0,0);
3339: }
3340: }
3341:
3342: # --------------------------------------------------------- Get symb from alias
3343:
3344: sub get_symb_from_alias {
3345: my $symb=shift;
3346: my ($map,$resid,$url)=&decode_symb($symb);
3347: # Already is a symb
3348: if ($url) { return $symb; }
3349: # Must be an alias
3350: my $aliassymb='';
3351: my %bighash;
3352: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
3353: &GDBM_READER(),0640)) {
3354: my $rid=$bighash{'mapalias_'.$symb};
3355: if ($rid) {
3356: my ($mapid,$resid)=split(/\./,$rid);
3357: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3358: $resid,$bighash{'src_'.$rid});
3359: }
3360: untie %bighash;
3361: }
3362: return $aliassymb;
3363: }
3364:
3365: # ----------------------------------------------------------------- Define Role
3366:
3367: sub definerole {
3368: if (allowed('mcr','/')) {
3369: my ($rolename,$sysrole,$domrole,$courole)=@_;
3370: foreach (split(':',$sysrole)) {
3371: my ($crole,$cqual)=split(/\&/,$_);
3372: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3373: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3374: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3375: return "refused:s:$crole&$cqual";
3376: }
3377: }
3378: }
3379: foreach (split(':',$domrole)) {
3380: my ($crole,$cqual)=split(/\&/,$_);
3381: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3382: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3383: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3384: return "refused:d:$crole&$cqual";
3385: }
3386: }
3387: }
3388: foreach (split(':',$courole)) {
3389: my ($crole,$cqual)=split(/\&/,$_);
3390: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3391: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3392: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3393: return "refused:c:$crole&$cqual";
3394: }
3395: }
3396: }
3397: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3398: "$env{'user.domain'}:$env{'user.name'}:".
3399: "rolesdef_$rolename=".
3400: escape($sysrole.'_'.$domrole.'_'.$courole);
3401: return reply($command,$env{'user.home'});
3402: } else {
3403: return 'refused';
3404: }
3405: }
3406:
3407: # ---------------- Make a metadata query against the network of library servers
3408:
3409: sub metadata_query {
3410: my ($query,$custom,$customshow,$server_array)=@_;
3411: my %rhash;
3412: my @server_list = (defined($server_array) ? @$server_array
3413: : keys(%libserv) );
3414: for my $server (@server_list) {
3415: unless ($custom or $customshow) {
3416: my $reply=&reply("querysend:".&escape($query),$server);
3417: $rhash{$server}=$reply;
3418: }
3419: else {
3420: my $reply=&reply("querysend:".&escape($query).':'.
3421: &escape($custom).':'.&escape($customshow),
3422: $server);
3423: $rhash{$server}=$reply;
3424: }
3425: }
3426: return \%rhash;
3427: }
3428:
3429: # ----------------------------------------- Send log queries and wait for reply
3430:
3431: sub log_query {
3432: my ($uname,$udom,$query,%filters)=@_;
3433: my $uhome=&homeserver($uname,$udom);
3434: if ($uhome eq 'no_host') { return 'error: no_host'; }
3435: my $uhost=$hostname{$uhome};
3436: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3437: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3438: $uhome);
3439: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3440: return get_query_reply($queryid);
3441: }
3442:
3443: # ------- Request retrieval of institutional classlists for course(s)
3444:
3445: sub fetch_enrollment_query {
3446: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3447: my $homeserver;
3448: my $maxtries = 1;
3449: if ($context eq 'automated') {
3450: $homeserver = $perlvar{'lonHostID'};
3451: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3452: } else {
3453: $homeserver = &homeserver($cnum,$dom);
3454: }
3455: my $host=$hostname{$homeserver};
3456: my $cmd = '';
3457: foreach (keys %{$affiliatesref}) {
3458: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3459: }
3460: $cmd =~ s/%%$//;
3461: $cmd = &escape($cmd);
3462: my $query = 'fetchenrollment';
3463: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
3464: unless ($queryid=~/^\Q$host\E\_/) {
3465: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3466: return 'error: '.$queryid;
3467: }
3468: my $reply = &get_query_reply($queryid);
3469: my $tries = 1;
3470: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3471: $reply = &get_query_reply($queryid);
3472: $tries ++;
3473: }
3474: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3475: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3476: } else {
3477: my @responses = split/:/,$reply;
3478: if ($homeserver eq $perlvar{'lonHostID'}) {
3479: foreach (@responses) {
3480: my ($key,$value) = split/=/,$_;
3481: $$replyref{$key} = $value;
3482: }
3483: } else {
3484: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3485: foreach (@responses) {
3486: my ($key,$value) = split/=/,$_;
3487: $$replyref{$key} = $value;
3488: if ($value > 0) {
3489: foreach (@{$$affiliatesref{$key}}) {
3490: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3491: my $destname = $pathname.'/'.$filename;
3492: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3493: if ($xml_classlist =~ /^error/) {
3494: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3495: } else {
3496: if ( open(FILE,">$destname") ) {
3497: print FILE &unescape($xml_classlist);
3498: close(FILE);
3499: } else {
3500: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3501: }
3502: }
3503: }
3504: }
3505: }
3506: }
3507: return 'ok';
3508: }
3509: return 'error';
3510: }
3511:
3512: sub get_query_reply {
3513: my $queryid=shift;
3514: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3515: my $reply='';
3516: for (1..100) {
3517: sleep 2;
3518: if (-e $replyfile.'.end') {
3519: if (open(my $fh,$replyfile)) {
3520: $reply.=<$fh>;
3521: close($fh);
3522: } else { return 'error: reply_file_error'; }
3523: return &unescape($reply);
3524: }
3525: }
3526: return 'timeout:'.$queryid;
3527: }
3528:
3529: sub courselog_query {
3530: #
3531: # possible filters:
3532: # url: url or symb
3533: # username
3534: # domain
3535: # action: view, submit, grade
3536: # start: timestamp
3537: # end: timestamp
3538: #
3539: my (%filters)=@_;
3540: unless ($env{'request.course.id'}) { return 'no_course'; }
3541: if ($filters{'url'}) {
3542: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3543: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3544: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3545: }
3546: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
3547: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
3548: return &log_query($cname,$cdom,'courselog',%filters);
3549: }
3550:
3551: sub userlog_query {
3552: my ($uname,$udom,%filters)=@_;
3553: return &log_query($uname,$udom,'userlog',%filters);
3554: }
3555:
3556: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3557:
3558: sub auto_run {
3559: my ($cnum,$cdom) = @_;
3560: my $homeserver = &homeserver($cnum,$cdom);
3561: my $response = &reply('autorun:'.$cdom,$homeserver);
3562: return $response;
3563: }
3564:
3565: sub auto_get_sections {
3566: my ($cnum,$cdom,$inst_coursecode) = @_;
3567: my $homeserver = &homeserver($cnum,$cdom);
3568: my @secs = ();
3569: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3570: unless ($response eq 'refused') {
3571: @secs = split/:/,$response;
3572: }
3573: return @secs;
3574: }
3575:
3576: sub auto_new_course {
3577: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3578: my $homeserver = &homeserver($cnum,$cdom);
3579: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3580: return $response;
3581: }
3582:
3583: sub auto_validate_courseID {
3584: my ($cnum,$cdom,$inst_course_id) = @_;
3585: my $homeserver = &homeserver($cnum,$cdom);
3586: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3587: return $response;
3588: }
3589:
3590: sub auto_create_password {
3591: my ($cnum,$cdom,$authparam) = @_;
3592: my $homeserver = &homeserver($cnum,$cdom);
3593: my $create_passwd = 0;
3594: my $authchk = '';
3595: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3596: if ($response eq 'refused') {
3597: $authchk = 'refused';
3598: } else {
3599: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3600: }
3601: return ($authparam,$create_passwd,$authchk);
3602: }
3603:
3604: sub auto_instcode_format {
3605: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3606: my $courses = '';
3607: my $homeserver;
3608: if ($caller eq 'global') {
3609: foreach my $tryserver (keys %libserv) {
3610: if ($hostdom{$tryserver} eq $codedom) {
3611: $homeserver = $tryserver;
3612: last;
3613: }
3614: }
3615: if (($env{'user.name'}) && ($env{'user.domain'} eq $codedom)) {
3616: $homeserver = &homeserver($env{'user.name'},$codedom);
3617: }
3618: } else {
3619: $homeserver = &homeserver($caller,$codedom);
3620: }
3621: foreach (keys %{$instcodes}) {
3622: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3623: }
3624: chop($courses);
3625: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3626: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3627: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3628: %{$codes} = &str2hash($codes_str);
3629: @{$codetitles} = &str2array($codetitles_str);
3630: %{$cat_titles} = &str2hash($cat_titles_str);
3631: %{$cat_order} = &str2hash($cat_order_str);
3632: return 'ok';
3633: }
3634: return $response;
3635: }
3636:
3637: # ------------------------------------------------------------------ Plain Text
3638:
3639: sub plaintext {
3640: my $short=shift;
3641: return &mt($prp{$short});
3642: }
3643:
3644: # ----------------------------------------------------------------- Assign Role
3645:
3646: sub assignrole {
3647: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3648: my $mrole;
3649: if ($role =~ /^cr\//) {
3650: my $cwosec=$url;
3651: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3652: unless (&allowed('ccr',$cwosec)) {
3653: &logthis('Refused custom assignrole: '.
3654: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3655: $env{'user.name'}.' at '.$env{'user.domain'});
3656: return 'refused';
3657: }
3658: $mrole='cr';
3659: } else {
3660: my $cwosec=$url;
3661: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3662: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3663: &logthis('Refused assignrole: '.
3664: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3665: $env{'user.name'}.' at '.$env{'user.domain'});
3666: return 'refused';
3667: }
3668: $mrole=$role;
3669: }
3670: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3671: "$udom:$uname:$url".'_'."$mrole=$role";
3672: if ($end) { $command.='_'.$end; }
3673: if ($start) {
3674: if ($end) {
3675: $command.='_'.$start;
3676: } else {
3677: $command.='_0_'.$start;
3678: }
3679: }
3680: # actually delete
3681: if ($deleteflag) {
3682: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3683: # modify command to delete the role
3684: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
3685: "$udom:$uname:$url".'_'."$mrole";
3686: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
3687: # set start and finish to negative values for userrolelog
3688: $start=-1;
3689: $end=-1;
3690: }
3691: }
3692: # send command
3693: my $answer=&reply($command,&homeserver($uname,$udom));
3694: # log new user role if status is ok
3695: if ($answer eq 'ok') {
3696: &userrolelog($role,$uname,$udom,$url,$start,$end);
3697: }
3698: return $answer;
3699: }
3700:
3701: # -------------------------------------------------- Modify user authentication
3702: # Overrides without validation
3703:
3704: sub modifyuserauth {
3705: my ($udom,$uname,$umode,$upass)=@_;
3706: my $uhome=&homeserver($uname,$udom);
3707: unless (&allowed('mau',$udom)) { return 'refused'; }
3708: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3709: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
3710: ' in domain '.$env{'request.role.domain'});
3711: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3712: &escape($upass),$uhome);
3713: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
3714: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3715: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3716: &log($udom,,$uname,$uhome,
3717: 'Authentication changed by '.$env{'user.domain'}.', '.
3718: $env{'user.name'}.', '.$umode.
3719: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3720: unless ($reply eq 'ok') {
3721: &logthis('Authentication mode error: '.$reply);
3722: return 'error: '.$reply;
3723: }
3724: return 'ok';
3725: }
3726:
3727: # --------------------------------------------------------------- Modify a user
3728:
3729: sub modifyuser {
3730: my ($udom, $uname, $uid,
3731: $umode, $upass, $first,
3732: $middle, $last, $gene,
3733: $forceid, $desiredhome, $email)=@_;
3734: $udom=~s/\W//g;
3735: $uname=~s/\W//g;
3736: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3737: $umode.', '.$first.', '.$middle.', '.
3738: $last.', '.$gene.'(forceid: '.$forceid.')'.
3739: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3740: ' desiredhome not specified').
3741: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
3742: ' in domain '.$env{'request.role.domain'});
3743: my $uhome=&homeserver($uname,$udom,'true');
3744: # ----------------------------------------------------------------- Create User
3745: if (($uhome eq 'no_host') &&
3746: (($umode && $upass) || ($umode eq 'localauth'))) {
3747: my $unhome='';
3748: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3749: $unhome = $desiredhome;
3750: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
3751: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
3752: } else { # load balancing routine for determining $unhome
3753: my $tryserver;
3754: my $loadm=10000000;
3755: foreach $tryserver (keys %libserv) {
3756: if ($hostdom{$tryserver} eq $udom) {
3757: my $answer=reply('load',$tryserver);
3758: if (($answer=~/\d+/) && ($answer<$loadm)) {
3759: $loadm=$answer;
3760: $unhome=$tryserver;
3761: }
3762: }
3763: }
3764: }
3765: if (($unhome eq '') || ($unhome eq 'no_host')) {
3766: return 'error: unable to find a home server for '.$uname.
3767: ' in domain '.$udom;
3768: }
3769: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3770: &escape($upass),$unhome);
3771: unless ($reply eq 'ok') {
3772: return 'error: '.$reply;
3773: }
3774: $uhome=&homeserver($uname,$udom,'true');
3775: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3776: return 'error: unable verify users home machine.';
3777: }
3778: } # End of creation of new user
3779: # ---------------------------------------------------------------------- Add ID
3780: if ($uid) {
3781: $uid=~tr/A-Z/a-z/;
3782: my %uidhash=&idrget($udom,$uname);
3783: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3784: && (!$forceid)) {
3785: unless ($uid eq $uidhash{$uname}) {
3786: return 'error: user id "'.$uid.'" does not match '.
3787: 'current user id "'.$uidhash{$uname}.'".';
3788: }
3789: } else {
3790: &idput($udom,($uname => $uid));
3791: }
3792: }
3793: # -------------------------------------------------------------- Add names, etc
3794: my @tmp=&get('environment',
3795: ['firstname','middlename','lastname','generation'],
3796: $udom,$uname);
3797: my %names;
3798: if ($tmp[0] =~ m/^error:.*/) {
3799: %names=();
3800: } else {
3801: %names = @tmp;
3802: }
3803: #
3804: # Make sure to not trash student environment if instructor does not bother
3805: # to supply name and email information
3806: #
3807: if ($first) { $names{'firstname'} = $first; }
3808: if (defined($middle)) { $names{'middlename'} = $middle; }
3809: if ($last) { $names{'lastname'} = $last; }
3810: if (defined($gene)) { $names{'generation'} = $gene; }
3811: if ($email) {
3812: $email=~s/[^\w\@\.\-\,]//gs;
3813: if ($email=~/\@/) { $names{'notification'} = $email;
3814: $names{'critnotification'} = $email;
3815: $names{'permanentemail'} = $email; }
3816: }
3817: my $reply = &put('environment', \%names, $udom,$uname);
3818: if ($reply ne 'ok') { return 'error: '.$reply; }
3819: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
3820: $umode.', '.$first.', '.$middle.', '.
3821: $last.', '.$gene.' by '.
3822: $env{'user.name'}.' at '.$env{'user.domain'});
3823: return 'ok';
3824: }
3825:
3826: # -------------------------------------------------------------- Modify student
3827:
3828: sub modifystudent {
3829: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3830: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
3831: if (!$cid) {
3832: unless ($cid=$env{'request.course.id'}) {
3833: return 'not_in_class';
3834: }
3835: }
3836: # --------------------------------------------------------------- Make the user
3837: my $reply=&modifyuser
3838: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
3839: $desiredhome,$email);
3840: unless ($reply eq 'ok') { return $reply; }
3841: # This will cause &modify_student_enrollment to get the uid from the
3842: # students environment
3843: $uid = undef if (!$forceid);
3844: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
3845: $gene,$usec,$end,$start,$type,$locktype,$cid);
3846: return $reply;
3847: }
3848:
3849: sub modify_student_enrollment {
3850: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
3851: my ($cdom,$cnum,$chome);
3852: if (!$cid) {
3853: unless ($cid=$env{'request.course.id'}) {
3854: return 'not_in_class';
3855: }
3856: $cdom=$env{'course.'.$cid.'.domain'};
3857: $cnum=$env{'course.'.$cid.'.num'};
3858: } else {
3859: ($cdom,$cnum)=split(/_/,$cid);
3860: }
3861: $chome=$env{'course.'.$cid.'.home'};
3862: if (!$chome) {
3863: $chome=&homeserver($cnum,$cdom);
3864: }
3865: if (!$chome) { return 'unknown_course'; }
3866: # Make sure the user exists
3867: my $uhome=&homeserver($uname,$udom);
3868: if (($uhome eq '') || ($uhome eq 'no_host')) {
3869: return 'error: no such user';
3870: }
3871: # Get student data if we were not given enough information
3872: if (!defined($first) || $first eq '' ||
3873: !defined($last) || $last eq '' ||
3874: !defined($uid) || $uid eq '' ||
3875: !defined($middle) || $middle eq '' ||
3876: !defined($gene) || $gene eq '') {
3877: # They did not supply us with enough data to enroll the student, so
3878: # we need to pick up more information.
3879: my %tmp = &get('environment',
3880: ['firstname','middlename','lastname', 'generation','id']
3881: ,$udom,$uname);
3882:
3883: #foreach (keys(%tmp)) {
3884: # &logthis("key $_ = ".$tmp{$_});
3885: #}
3886: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3887: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3888: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3889: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3890: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3891: }
3892: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
3893: my $reply=cput('classlist',
3894: {"$uname:$udom" =>
3895: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
3896: $cdom,$cnum);
3897: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3898: return 'error: '.$reply;
3899: } else {
3900: &devalidate_getsection_cache($udom,$uname,$cid);
3901: }
3902: # Add student role to user
3903: my $uurl='/'.$cid;
3904: $uurl=~s/\_/\//g;
3905: if ($usec) {
3906: $uurl.='/'.$usec;
3907: }
3908: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3909: }
3910:
3911: sub format_name {
3912: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
3913: my $name;
3914: if ($first ne 'lastname') {
3915: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
3916: } else {
3917: if ($lastname=~/\S/) {
3918: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
3919: $name=~s/\s+,/,/;
3920: } else {
3921: $name.= $firstname.' '.$middlename.' '.$generation;
3922: }
3923: }
3924: $name=~s/^\s+//;
3925: $name=~s/\s+$//;
3926: $name=~s/\s+/ /g;
3927: return $name;
3928: }
3929:
3930: # ------------------------------------------------- Write to course preferences
3931:
3932: sub writecoursepref {
3933: my ($courseid,%prefs)=@_;
3934: $courseid=~s/^\///;
3935: $courseid=~s/\_/\//g;
3936: my ($cdomain,$cnum)=split(/\//,$courseid);
3937: my $chome=homeserver($cnum,$cdomain);
3938: if (($chome eq '') || ($chome eq 'no_host')) {
3939: return 'error: no such course';
3940: }
3941: my $cstring='';
3942: foreach (keys %prefs) {
3943: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3944: }
3945: $cstring=~s/\&$//;
3946: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3947: }
3948:
3949: # ---------------------------------------------------------- Make/modify course
3950:
3951: sub createcourse {
3952: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_;
3953: $url=&declutter($url);
3954: my $cid='';
3955: unless (&allowed('ccc',$udom)) {
3956: return 'refused';
3957: }
3958: # ------------------------------------------------------------------- Create ID
3959: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3960: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3961: # ----------------------------------------------- Make sure that does not exist
3962: my $uhome=&homeserver($uname,$udom,'true');
3963: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3964: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3965: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3966: $uhome=&homeserver($uname,$udom,'true');
3967: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3968: return 'error: unable to generate unique course-ID';
3969: }
3970: }
3971: # ------------------------------------------------ Check supplied server name
3972: $course_server = $env{'user.homeserver'} if (! defined($course_server));
3973: if (! exists($libserv{$course_server})) {
3974: return 'error:bad server name '.$course_server;
3975: }
3976: # ------------------------------------------------------------- Make the course
3977: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3978: $course_server);
3979: unless ($reply eq 'ok') { return 'error: '.$reply; }
3980: $uhome=&homeserver($uname,$udom,'true');
3981: if (($uhome eq '') || ($uhome eq 'no_host')) {
3982: return 'error: no such course';
3983: }
3984: # ----------------------------------------------------------------- Course made
3985: # log existence
3986: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
3987: ':'.&escape($inst_code).':'.&escape($course_owner),$uhome);
3988: &flushcourselogs();
3989: # set toplevel url
3990: my $topurl=$url;
3991: unless ($nonstandard) {
3992: # ------------------------------------------ For standard courses, make top url
3993: my $mapurl=&clutter($url);
3994: if ($mapurl eq '/res/') { $mapurl=''; }
3995: $env{'form.initmap'}=(<<ENDINITMAP);
3996: <map>
3997: <resource id="1" type="start"></resource>
3998: <resource id="2" src="$mapurl"></resource>
3999: <resource id="3" type="finish"></resource>
4000: <link index="1" from="1" to="2"></link>
4001: <link index="2" from="2" to="3"></link>
4002: </map>
4003: ENDINITMAP
4004: $topurl=&declutter(
4005: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
4006: );
4007: }
4008: # ----------------------------------------------------------- Write preferences
4009: &writecoursepref($udom.'_'.$uname,
4010: ('description' => $description,
4011: 'url' => $topurl));
4012: return '/'.$udom.'/'.$uname;
4013: }
4014:
4015: # ---------------------------------------------------------- Assign Custom Role
4016:
4017: sub assigncustomrole {
4018: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
4019: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
4020: $end,$start,$deleteflag);
4021: }
4022:
4023: # ----------------------------------------------------------------- Revoke Role
4024:
4025: sub revokerole {
4026: my ($udom,$uname,$url,$role,$deleteflag)=@_;
4027: my $now=time;
4028: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
4029: }
4030:
4031: # ---------------------------------------------------------- Revoke Custom Role
4032:
4033: sub revokecustomrole {
4034: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
4035: my $now=time;
4036: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
4037: $deleteflag);
4038: }
4039:
4040: # ------------------------------------------------------------ Disk usage
4041: sub diskusage {
4042: my ($udom,$uname,$directoryRoot)=@_;
4043: $directoryRoot =~ s/\/$//;
4044: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
4045: return $listing;
4046: }
4047:
4048: sub is_locked {
4049: my ($file_name, $domain, $user) = @_;
4050: my @check;
4051: my $is_locked;
4052: push @check, $file_name;
4053: my %locked = &get('file_permissions',\@check,
4054: $env{'user.domain'},$env{'user.name'});
4055: my ($tmp)=keys(%locked);
4056: if ($tmp=~/^error:/) { undef(%locked); }
4057:
4058: if (ref($locked{$file_name}) eq 'ARRAY') {
4059: $is_locked = 'true';
4060: } else {
4061: $is_locked = 'false';
4062: }
4063: }
4064:
4065: # ------------------------------------------------------------- Mark as Read Only
4066:
4067: sub mark_as_readonly {
4068: my ($domain,$user,$files,$what) = @_;
4069: my %current_permissions = &dump('file_permissions',$domain,$user);
4070: my ($tmp)=keys(%current_permissions);
4071: if ($tmp=~/^error:/) { undef(%current_permissions); }
4072: foreach my $file (@{$files}) {
4073: push(@{$current_permissions{$file}},$what);
4074: }
4075: &put('file_permissions',\%current_permissions,$domain,$user);
4076: return;
4077: }
4078:
4079: # ------------------------------------------------------------Save Selected Files
4080:
4081: sub save_selected_files {
4082: my ($user, $path, @files) = @_;
4083: my $filename = $user."savedfiles";
4084: my @other_files = &files_not_in_path($user, $path);
4085: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4086: foreach my $file (@files) {
4087: print (OUT $env{'form.currentpath'}.$file."\n");
4088: }
4089: foreach my $file (@other_files) {
4090: print (OUT $file."\n");
4091: }
4092: close (OUT);
4093: return 'ok';
4094: }
4095:
4096: sub clear_selected_files {
4097: my ($user) = @_;
4098: my $filename = $user."savedfiles";
4099: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4100: print (OUT undef);
4101: close (OUT);
4102: return ("ok");
4103: }
4104:
4105: sub files_in_path {
4106: my ($user, $path) = @_;
4107: my $filename = $user."savedfiles";
4108: my %return_files;
4109: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4110: while (my $line_in = <IN>) {
4111: chomp ($line_in);
4112: my @paths_and_file = split (m!/!, $line_in);
4113: my $file_part = pop (@paths_and_file);
4114: my $path_part = join ('/', @paths_and_file);
4115: $path_part.='/';
4116: my $path_and_file = $path_part.$file_part;
4117: if ($path_part eq $path) {
4118: $return_files{$file_part}= 'selected';
4119: }
4120: }
4121: close (IN);
4122: return (\%return_files);
4123: }
4124:
4125: # called in portfolio select mode, to show files selected NOT in current directory
4126: sub files_not_in_path {
4127: my ($user, $path) = @_;
4128: my $filename = $user."savedfiles";
4129: my @return_files;
4130: my $path_part;
4131: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4132: while (<IN>) {
4133: #ok, I know it's clunky, but I want it to work
4134: my @paths_and_file = split m!/!, $_;
4135: my $file_part = pop (@paths_and_file);
4136: chomp ($file_part);
4137: my $path_part = join ('/', @paths_and_file);
4138: $path_part .= '/';
4139: my $path_and_file = $path_part.$file_part;
4140: if ($path_part ne $path) {
4141: push (@return_files, ($path_and_file));
4142: }
4143: }
4144: close (OUT);
4145: return (@return_files);
4146: }
4147:
4148: #--------------------------------------------------------------Get Marked as Read Only
4149:
4150:
4151: sub get_marked_as_readonly {
4152: my ($domain,$user,$what) = @_;
4153: my %current_permissions = &dump('file_permissions',$domain,$user);
4154: my ($tmp)=keys(%current_permissions);
4155: if ($tmp=~/^error:/) { undef(%current_permissions); }
4156: my @readonly_files;
4157: my $cmp1=$what;
4158: if (ref($what)) { $cmp1=join('',@{$what}) };
4159: while (my ($file_name,$value) = each(%current_permissions)) {
4160: if (ref($value) eq "ARRAY"){
4161: foreach my $stored_what (@{$value}) {
4162: my $cmp2=$stored_what;
4163: if (ref($stored_what)) { $cmp2=join('',@{$stored_what}) };
4164: if ($cmp1 eq $cmp2) {
4165: push(@readonly_files, $file_name);
4166: } elsif (!defined($what)) {
4167: push(@readonly_files, $file_name);
4168: }
4169: }
4170: }
4171: }
4172: return @readonly_files;
4173: }
4174: #-----------------------------------------------------------Get Marked as Read Only Hash
4175:
4176: sub get_marked_as_readonly_hash {
4177: my ($domain,$user,$what) = @_;
4178: my %current_permissions = &dump('file_permissions',$domain,$user);
4179: my ($tmp)=keys(%current_permissions);
4180: if ($tmp=~/^error:/) { undef(%current_permissions); }
4181:
4182: my %readonly_files;
4183: while (my ($file_name,$value) = each(%current_permissions)) {
4184: if (ref($value) eq "ARRAY"){
4185: foreach my $stored_what (@{$value}) {
4186: if ($stored_what eq $what) {
4187: $readonly_files{$file_name} = 'locked';
4188: } elsif (!defined($what)) {
4189: $readonly_files{$file_name} = 'locked';
4190: }
4191: }
4192: }
4193: }
4194: return %readonly_files;
4195: }
4196: # ------------------------------------------------------------ Unmark as Read Only
4197:
4198: sub unmark_as_readonly {
4199: # unmarks $file_name (if $file_name is defined), or all files locked by $what
4200: # for portfolio submissions, $what contains [$symb,$crsid]
4201: my ($domain,$user,$what,$file_name) = @_;
4202: my $symb_crs = $what;
4203: if (ref($what)) { $symb_crs=join('',@$what); }
4204: my %current_permissions = &dump('file_permissions',$domain,$user);
4205: my ($tmp)=keys(%current_permissions);
4206: if ($tmp=~/^error:/) { undef(%current_permissions); }
4207: my @readonly_files = &get_marked_as_readonly($domain,$user,$what);
4208: foreach my $file (@readonly_files) {
4209: if (defined($file_name) && ($file_name ne $file)) { next; }
4210: my $current_locks = $current_permissions{$file};
4211: my @new_locks;
4212: my @del_keys;
4213: if (ref($current_locks) eq "ARRAY"){
4214: foreach my $locker (@{$current_locks}) {
4215: my $compare=$locker;
4216: if (ref($locker)) { $compare=join('',@{$locker}) };
4217: if ($compare ne $symb_crs) {
4218: push(@new_locks, $locker);
4219: }
4220: }
4221: if (scalar(@new_locks) > 0) {
4222: $current_permissions{$file} = \@new_locks;
4223: } else {
4224: push(@del_keys, $file);
4225: &del('file_permissions',\@del_keys, $domain, $user);
4226: delete($current_permissions{$file});
4227: }
4228: }
4229: }
4230: &put('file_permissions',\%current_permissions,$domain,$user);
4231: return;
4232: }
4233:
4234: # ------------------------------------------------------------ Directory lister
4235:
4236: sub dirlist {
4237: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
4238:
4239: $uri=~s/^\///;
4240: $uri=~s/\/$//;
4241: my ($udom, $uname);
4242: (undef,$udom,$uname)=split(/\//,$uri);
4243: if(defined($userdomain)) {
4244: $udom = $userdomain;
4245: }
4246: if(defined($username)) {
4247: $uname = $username;
4248: }
4249:
4250: my $dirRoot = $perlvar{'lonDocRoot'};
4251: if(defined($alternateDirectoryRoot)) {
4252: $dirRoot = $alternateDirectoryRoot;
4253: $dirRoot =~ s/\/$//;
4254: }
4255:
4256: if($udom) {
4257: if($uname) {
4258: my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
4259: homeserver($uname,$udom));
4260: my @listing_results;
4261: if ($listing eq 'unknown_cmd') {
4262: $listing=reply('ls:'.$dirRoot.'/'.$uri,
4263: homeserver($uname,$udom));
4264: @listing_results = split(/:/,$listing);
4265: } else {
4266: @listing_results = map { &unescape($_); } split(/:/,$listing);
4267: }
4268: return @listing_results;
4269: } elsif(!defined($alternateDirectoryRoot)) {
4270: my $tryserver;
4271: my %allusers=();
4272: foreach $tryserver (keys %libserv) {
4273: if($hostdom{$tryserver} eq $udom) {
4274: my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
4275: $udom, $tryserver);
4276: my @listing_results;
4277: if ($listing eq 'unknown_cmd') {
4278: $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
4279: $udom, $tryserver);
4280: @listing_results = split(/:/,$listing);
4281: } else {
4282: @listing_results =
4283: map { &unescape($_); } split(/:/,$listing);
4284: }
4285: if ($listing_results[0] ne 'no_such_dir' &&
4286: $listing_results[0] ne 'empty' &&
4287: $listing_results[0] ne 'con_lost') {
4288: foreach (@listing_results) {
4289: my ($entry,@stat)=split(/&/,$_);
4290: $allusers{$entry}=1;
4291: }
4292: }
4293: }
4294: }
4295: my $alluserstr='';
4296: foreach (sort keys %allusers) {
4297: $alluserstr.=$_.'&user:';
4298: }
4299: $alluserstr=~s/:$//;
4300: return split(/:/,$alluserstr);
4301: } else {
4302: my @emptyResults = ();
4303: push(@emptyResults, 'missing user name');
4304: return split(':',@emptyResults);
4305: }
4306: } elsif(!defined($alternateDirectoryRoot)) {
4307: my $tryserver;
4308: my %alldom=();
4309: foreach $tryserver (keys %libserv) {
4310: $alldom{$hostdom{$tryserver}}=1;
4311: }
4312: my $alldomstr='';
4313: foreach (sort keys %alldom) {
4314: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
4315: }
4316: $alldomstr=~s/:$//;
4317: return split(/:/,$alldomstr);
4318: } else {
4319: my @emptyResults = ();
4320: push(@emptyResults, 'missing domain');
4321: return split(':',@emptyResults);
4322: }
4323: }
4324:
4325: # --------------------------------------------- GetFileTimestamp
4326: # This function utilizes dirlist and returns the date stamp for
4327: # when it was last modified. It will also return an error of -1
4328: # if an error occurs
4329:
4330: ##
4331: ## FIXME: This subroutine assumes its caller knows something about the
4332: ## directory structure of the home server for the student ($root).
4333: ## Not a good assumption to make. Since this is for looking up files
4334: ## in user directories, the full path should be constructed by lond, not
4335: ## whatever machine we request data from.
4336: ##
4337: sub GetFileTimestamp {
4338: my ($studentDomain,$studentName,$filename,$root)=@_;
4339: $studentDomain=~s/\W//g;
4340: $studentName=~s/\W//g;
4341: my $subdir=$studentName.'__';
4342: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4343: my $proname="$studentDomain/$subdir/$studentName";
4344: $proname .= '/'.$filename;
4345: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
4346: $studentName, $root);
4347: my @stats = split('&', $fileStat);
4348: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4349: # @stats contains first the filename, then the stat output
4350: return $stats[10]; # so this is 10 instead of 9.
4351: } else {
4352: return -1;
4353: }
4354: }
4355:
4356: # -------------------------------------------------------- Value of a Condition
4357:
4358: sub directcondval {
4359: my $number=shift;
4360: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
4361: &Apache::lonuserstate::evalstate();
4362: }
4363: if ($env{'user.state.'.$env{'request.course.id'}}) {
4364: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
4365: } else {
4366: return 2;
4367: }
4368: }
4369:
4370: sub condval {
4371: my $condidx=shift;
4372: my $result=0;
4373: my $allpathcond='';
4374: foreach (split(/\|/,$condidx)) {
4375: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$_})) {
4376: $allpathcond.=
4377: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$_}.')|';
4378: }
4379: }
4380: $allpathcond=~s/\|$//;
4381: if ($env{'request.course.id'}) {
4382: if ($allpathcond) {
4383: my $operand='|';
4384: my @stack;
4385: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
4386: if ($_ eq '(') {
4387: push @stack,($operand,$result)
4388: } elsif ($_ eq ')') {
4389: my $before=pop @stack;
4390: if (pop @stack eq '&') {
4391: $result=$result>$before?$before:$result;
4392: } else {
4393: $result=$result>$before?$result:$before;
4394: }
4395: } elsif (($_ eq '&') || ($_ eq '|')) {
4396: $operand=$_;
4397: } else {
4398: my $new=directcondval($_);
4399: if ($operand eq '&') {
4400: $result=$result>$new?$new:$result;
4401: } else {
4402: $result=$result>$new?$result:$new;
4403: }
4404: }
4405: }
4406: }
4407: }
4408: return $result;
4409: }
4410:
4411: # ---------------------------------------------------- Devalidate courseresdata
4412:
4413: sub devalidatecourseresdata {
4414: my ($coursenum,$coursedomain)=@_;
4415: my $hashid=$coursenum.':'.$coursedomain;
4416: &devalidate_cache_new('courseres',$hashid);
4417: }
4418:
4419: # --------------------------------------------------- Course Resourcedata Query
4420:
4421: sub get_courseresdata {
4422: my ($coursenum,$coursedomain)=@_;
4423: my $coursehom=&homeserver($coursenum,$coursedomain);
4424: my $hashid=$coursenum.':'.$coursedomain;
4425: my ($result,$cached)=&is_cached_new('courseres',$hashid);
4426: my %dumpreply;
4427: unless (defined($cached)) {
4428: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
4429: $result=\%dumpreply;
4430: my ($tmp) = keys(%dumpreply);
4431: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
4432: &do_cache_new('courseres',$hashid,$result,600);
4433: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4434: return $tmp;
4435: } elsif ($tmp =~ /^(error)/) {
4436: $result=undef;
4437: &do_cache_new('courseres',$hashid,$result,600);
4438: }
4439: }
4440: return $result;
4441: }
4442:
4443: sub devalidateuserresdata {
4444: my ($uname,$udom)=@_;
4445: my $hashid="$udom:$uname";
4446: &devalidate_cache_new('userres',$hashid);
4447: }
4448:
4449: sub get_userresdata {
4450: my ($uname,$udom)=@_;
4451: #most student don\'t have any data set, check if there is some data
4452: if (&EXT_cache_status($udom,$uname)) { return undef; }
4453:
4454: my $hashid="$udom:$uname";
4455: my ($result,$cached)=&is_cached_new('userres',$hashid);
4456: if (!defined($cached)) {
4457: my %resourcedata=&dump('resourcedata',$udom,$uname);
4458: $result=\%resourcedata;
4459: &do_cache_new('userres',$hashid,$result,600);
4460: }
4461: my ($tmp)=keys(%$result);
4462: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4463: return $result;
4464: }
4465: #error 2 occurs when the .db doesn't exist
4466: if ($tmp!~/error: 2 /) {
4467: &logthis("<font color=blue>WARNING:".
4468: " Trying to get resource data for ".
4469: $uname." at ".$udom.": ".
4470: $tmp."</font>");
4471: } elsif ($tmp=~/error: 2 /) {
4472: #&EXT_cache_set($udom,$uname);
4473: &do_cache_new('userres',$hashid,undef,600);
4474: undef($tmp); # not really an error so don't send it back
4475: }
4476: return $tmp;
4477: }
4478:
4479: sub resdata {
4480: my ($name,$domain,$type,@which)=@_;
4481: my $result;
4482: if ($type eq 'course') {
4483: $result=&get_courseresdata($name,$domain);
4484: } elsif ($type eq 'user') {
4485: $result=&get_userresdata($name,$domain);
4486: }
4487: if (!ref($result)) { return $result; }
4488: foreach my $item (@which) {
4489: if (defined($result->{$item})) {
4490: return $result->{$item};
4491: }
4492: }
4493: return undef;
4494: }
4495:
4496: #
4497: # EXT resource caching routines
4498: #
4499:
4500: sub clear_EXT_cache_status {
4501: &delenv('cache.EXT.');
4502: }
4503:
4504: sub EXT_cache_status {
4505: my ($target_domain,$target_user) = @_;
4506: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4507: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
4508: # We know already the user has no data
4509: return 1;
4510: } else {
4511: return 0;
4512: }
4513: }
4514:
4515: sub EXT_cache_set {
4516: my ($target_domain,$target_user) = @_;
4517: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4518: #&appenv($cachename => time);
4519: }
4520:
4521: # --------------------------------------------------------- Value of a Variable
4522: sub EXT {
4523: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
4524:
4525: unless ($varname) { return ''; }
4526: #get real user name/domain, courseid and symb
4527: my $courseid;
4528: my $publicuser;
4529: if ($symbparm) {
4530: $symbparm=&get_symb_from_alias($symbparm);
4531: }
4532: if (!($uname && $udom)) {
4533: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
4534: &Apache::lonxml::whichuser($symbparm);
4535: if (!$symbparm) { $symbparm=$cursymb; }
4536: } else {
4537: $courseid=$env{'request.course.id'};
4538: }
4539: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
4540: my $rest;
4541: if (defined($therest[0])) {
4542: $rest=join('.',@therest);
4543: } else {
4544: $rest='';
4545: }
4546:
4547: my $qualifierrest=$qualifier;
4548: if ($rest) { $qualifierrest.='.'.$rest; }
4549: my $spacequalifierrest=$space;
4550: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
4551: if ($realm eq 'user') {
4552: # --------------------------------------------------------------- user.resource
4553: if ($space eq 'resource') {
4554: if ( (defined($Apache::lonhomework::parsing_a_problem)
4555: || defined($Apache::lonhomework::parsing_a_task))
4556: &&
4557: ($symbparm eq &symbread()) ) {
4558: return $Apache::lonhomework::history{$qualifierrest};
4559: } else {
4560: my %restored;
4561: if ($publicuser || $env{'request.state'} eq 'construct') {
4562: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
4563: } else {
4564: %restored=&restore($symbparm,$courseid,$udom,$uname);
4565: }
4566: return $restored{$qualifierrest};
4567: }
4568: # ----------------------------------------------------------------- user.access
4569: } elsif ($space eq 'access') {
4570: # FIXME - not supporting calls for a specific user
4571: return &allowed($qualifier,$rest);
4572: # ------------------------------------------ user.preferences, user.environment
4573: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
4574: if (($uname eq $env{'user.name'}) &&
4575: ($udom eq $env{'user.domain'})) {
4576: return $env{join('.',('environment',$qualifierrest))};
4577: } else {
4578: my %returnhash;
4579: if (!$publicuser) {
4580: %returnhash=&userenvironment($udom,$uname,
4581: $qualifierrest);
4582: }
4583: return $returnhash{$qualifierrest};
4584: }
4585: # ----------------------------------------------------------------- user.course
4586: } elsif ($space eq 'course') {
4587: # FIXME - not supporting calls for a specific user
4588: return $env{join('.',('request.course',$qualifier))};
4589: # ------------------------------------------------------------------- user.role
4590: } elsif ($space eq 'role') {
4591: # FIXME - not supporting calls for a specific user
4592: my ($role,$where)=split(/\./,$env{'request.role'});
4593: if ($qualifier eq 'value') {
4594: return $role;
4595: } elsif ($qualifier eq 'extent') {
4596: return $where;
4597: }
4598: # ----------------------------------------------------------------- user.domain
4599: } elsif ($space eq 'domain') {
4600: return $udom;
4601: # ------------------------------------------------------------------- user.name
4602: } elsif ($space eq 'name') {
4603: return $uname;
4604: # ---------------------------------------------------- Any other user namespace
4605: } else {
4606: my %reply;
4607: if (!$publicuser) {
4608: %reply=&get($space,[$qualifierrest],$udom,$uname);
4609: }
4610: return $reply{$qualifierrest};
4611: }
4612: } elsif ($realm eq 'query') {
4613: # ---------------------------------------------- pull stuff out of query string
4614: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
4615: [$spacequalifierrest]);
4616: return $env{'form.'.$spacequalifierrest};
4617: } elsif ($realm eq 'request') {
4618: # ------------------------------------------------------------- request.browser
4619: if ($space eq 'browser') {
4620: if ($qualifier eq 'textremote') {
4621: if (&mt('textual_remote_display') eq 'on') {
4622: return 1;
4623: } else {
4624: return 0;
4625: }
4626: } else {
4627: return $env{'browser.'.$qualifier};
4628: }
4629: # ------------------------------------------------------------ request.filename
4630: } else {
4631: return $env{'request.'.$spacequalifierrest};
4632: }
4633: } elsif ($realm eq 'course') {
4634: # ---------------------------------------------------------- course.description
4635: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
4636: } elsif ($realm eq 'resource') {
4637:
4638: my $section;
4639: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
4640: if (!$symbparm) { $symbparm=&symbread(); }
4641: }
4642: my ($courselevelm,$courselevel);
4643: if ($symbparm && defined($courseid) &&
4644: $courseid eq $env{'request.course.id'}) {
4645:
4646: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
4647:
4648: # ----------------------------------------------------- Cascading lookup scheme
4649: my $symbp=$symbparm;
4650: my $mapp=(&decode_symb($symbp))[0];
4651:
4652: my $symbparm=$symbp.'.'.$spacequalifierrest;
4653: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
4654:
4655: if (($env{'user.name'} eq $uname) &&
4656: ($env{'user.domain'} eq $udom)) {
4657: $section=$env{'request.course.sec'};
4658: } else {
4659: if (! defined($usection)) {
4660: $section=&getsection($udom,$uname,$courseid);
4661: } else {
4662: $section = $usection;
4663: }
4664: }
4665:
4666: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
4667: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
4668: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
4669:
4670: $courselevel=$courseid.'.'.$spacequalifierrest;
4671: my $courselevelr=$courseid.'.'.$symbparm;
4672: $courselevelm=$courseid.'.'.$mapparm;
4673:
4674: # ----------------------------------------------------------- first, check user
4675:
4676: my $userreply=&resdata($uname,$udom,'user',
4677: ($courselevelr,$courselevelm,
4678: $courselevel));
4679:
4680: if (defined($userreply)) { return $userreply; }
4681:
4682: # ------------------------------------------------ second, check some of course
4683:
4684: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
4685: $env{'course.'.$courseid.'.domain'},
4686: 'course',
4687: ($seclevelr,$seclevelm,$seclevel,
4688: $courselevelr));
4689: if (defined($coursereply)) { return $coursereply; }
4690:
4691: # ------------------------------------------------------ third, check map parms
4692: my %parmhash=();
4693: my $thisparm='';
4694: if (tie(%parmhash,'GDBM_File',
4695: $env{'request.course.fn'}.'_parms.db',
4696: &GDBM_READER(),0640)) {
4697: $thisparm=$parmhash{$symbparm};
4698: untie(%parmhash);
4699: }
4700: if ($thisparm) { return $thisparm; }
4701: }
4702: # ------------------------------------------ fourth, look in resource metadata
4703:
4704: $spacequalifierrest=~s/\./\_/;
4705: my $filename;
4706: if (!$symbparm) { $symbparm=&symbread(); }
4707: if ($symbparm) {
4708: $filename=(&decode_symb($symbparm))[2];
4709: } else {
4710: $filename=$env{'request.filename'};
4711: }
4712: my $metadata=&metadata($filename,$spacequalifierrest);
4713: if (defined($metadata)) { return $metadata; }
4714: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
4715: if (defined($metadata)) { return $metadata; }
4716:
4717: # ---------------------------------------------- fourth, look in rest pf course
4718: if ($symbparm && defined($courseid) &&
4719: $courseid eq $env{'request.course.id'}) {
4720: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
4721: $env{'course.'.$courseid.'.domain'},
4722: 'course',
4723: ($courselevelm,$courselevel));
4724: if (defined($coursereply)) { return $coursereply; }
4725: }
4726: # ------------------------------------------------------------------ Cascade up
4727: unless ($space eq '0') {
4728: my @parts=split(/_/,$space);
4729: my $id=pop(@parts);
4730: my $part=join('_',@parts);
4731: if ($part eq '') { $part='0'; }
4732: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
4733: $symbparm,$udom,$uname,$section,1);
4734: if (defined($partgeneral)) { return $partgeneral; }
4735: }
4736: if ($recurse) { return undef; }
4737: my $pack_def=&packages_tab_default($filename,$varname);
4738: if (defined($pack_def)) { return $pack_def; }
4739:
4740: # ---------------------------------------------------- Any other user namespace
4741: } elsif ($realm eq 'environment') {
4742: # ----------------------------------------------------------------- environment
4743: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
4744: return $env{'environment.'.$spacequalifierrest};
4745: } else {
4746: my %returnhash=&userenvironment($udom,$uname,
4747: $spacequalifierrest);
4748: return $returnhash{$spacequalifierrest};
4749: }
4750: } elsif ($realm eq 'system') {
4751: # ----------------------------------------------------------------- system.time
4752: if ($space eq 'time') {
4753: return time;
4754: }
4755: }
4756: return '';
4757: }
4758:
4759: sub packages_tab_default {
4760: my ($uri,$varname)=@_;
4761: my (undef,$part,$name)=split(/\./,$varname);
4762: my $packages=&metadata($uri,'packages');
4763: foreach my $package (split(/,/,$packages)) {
4764: my ($pack_type,$pack_part)=split(/_/,$package,2);
4765: if (defined($packagetab{"$pack_type&$name&default"})) {
4766: return $packagetab{"$pack_type&$name&default"};
4767: }
4768: if ($pack_type eq 'part') { $pack_part='0'; }
4769: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
4770: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
4771: }
4772: }
4773: return undef;
4774: }
4775:
4776: sub add_prefix_and_part {
4777: my ($prefix,$part)=@_;
4778: my $keyroot;
4779: if (defined($prefix) && $prefix !~ /^__/) {
4780: # prefix that has a part already
4781: $keyroot=$prefix;
4782: } elsif (defined($prefix)) {
4783: # prefix that is missing a part
4784: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
4785: } else {
4786: # no prefix at all
4787: if (defined($part)) { $keyroot='_'.$part; }
4788: }
4789: return $keyroot;
4790: }
4791:
4792: # ---------------------------------------------------------------- Get metadata
4793:
4794: my %metaentry;
4795: sub metadata {
4796: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
4797: $uri=&declutter($uri);
4798: # if it is a non metadata possible uri return quickly
4799: if (($uri eq '') ||
4800: (($uri =~ m|^/*adm/|) &&
4801: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
4802: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
4803: ($uri =~ m|home/[^/]+/public_html/|)) {
4804: return undef;
4805: }
4806: my $filename=$uri;
4807: $uri=~s/\.meta$//;
4808: #
4809: # Is the metadata already cached?
4810: # Look at timestamp of caching
4811: # Everything is cached by the main uri, libraries are never directly cached
4812: #
4813: if (!defined($liburi)) {
4814: my ($result,$cached)=&is_cached_new('meta',$uri);
4815: if (defined($cached)) { return $result->{':'.$what}; }
4816: }
4817: {
4818: #
4819: # Is this a recursive call for a library?
4820: #
4821: # if (! exists($metacache{$uri})) {
4822: # $metacache{$uri}={};
4823: # }
4824: if ($liburi) {
4825: $liburi=&declutter($liburi);
4826: $filename=$liburi;
4827: } else {
4828: &devalidate_cache_new('meta',$uri);
4829: undef(%metaentry);
4830: }
4831: my %metathesekeys=();
4832: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
4833: my $metastring;
4834: if ($uri !~ m -^(uploaded|editupload)/-) {
4835: my $file=&filelocation('',&clutter($filename));
4836: #push(@{$metaentry{$uri.'.file'}},$file);
4837: $metastring=&getfile($file);
4838: }
4839: my $parser=HTML::LCParser->new(\$metastring);
4840: my $token;
4841: undef %metathesekeys;
4842: while ($token=$parser->get_token) {
4843: if ($token->[0] eq 'S') {
4844: if (defined($token->[2]->{'package'})) {
4845: #
4846: # This is a package - get package info
4847: #
4848: my $package=$token->[2]->{'package'};
4849: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4850: if (defined($token->[2]->{'id'})) {
4851: $keyroot.='_'.$token->[2]->{'id'};
4852: }
4853: if ($metaentry{':packages'}) {
4854: $metaentry{':packages'}.=','.$package.$keyroot;
4855: } else {
4856: $metaentry{':packages'}=$package.$keyroot;
4857: }
4858: foreach (sort keys %packagetab) {
4859: my $part=$keyroot;
4860: $part=~s/^\_//;
4861: if ($_=~/^\Q$package\E\&/ ||
4862: $_=~/^\Q$package\E_0\&/) {
4863: my ($pack,$name,$subp)=split(/\&/,$_);
4864: # ignore package.tab specified default values
4865: # here &package_tab_default() will fetch those
4866: if ($subp eq 'default') { next; }
4867: my $value=$packagetab{$_};
4868: my $unikey;
4869: if ($pack =~ /_0$/) {
4870: $unikey='parameter_0_'.$name;
4871: $part=0;
4872: } else {
4873: $unikey='parameter'.$keyroot.'_'.$name;
4874: }
4875: if ($subp eq 'display') {
4876: $value.=' [Part: '.$part.']';
4877: }
4878: $metaentry{':'.$unikey.'.part'}=$part;
4879: $metathesekeys{$unikey}=1;
4880: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
4881: $metaentry{':'.$unikey.'.'.$subp}=$value;
4882: }
4883: if (defined($metaentry{':'.$unikey.'.default'})) {
4884: $metaentry{':'.$unikey}=
4885: $metaentry{':'.$unikey.'.default'};
4886: }
4887: }
4888: }
4889: } else {
4890: #
4891: # This is not a package - some other kind of start tag
4892: #
4893: my $entry=$token->[1];
4894: my $unikey;
4895: if ($entry eq 'import') {
4896: $unikey='';
4897: } else {
4898: $unikey=$entry;
4899: }
4900: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4901:
4902: if (defined($token->[2]->{'id'})) {
4903: $unikey.='_'.$token->[2]->{'id'};
4904: }
4905:
4906: if ($entry eq 'import') {
4907: #
4908: # Importing a library here
4909: #
4910: if ($depthcount<20) {
4911: my $location=$parser->get_text('/import');
4912: my $dir=$filename;
4913: $dir=~s|[^/]*$||;
4914: $location=&filelocation($dir,$location);
4915: foreach (sort(split(/\,/,&metadata($uri,'keys',
4916: $location,$unikey,
4917: $depthcount+1)))) {
4918: $metaentry{':'.$_}=$metaentry{':'.$_};
4919: $metathesekeys{$_}=1;
4920: }
4921: }
4922: } else {
4923:
4924: if (defined($token->[2]->{'name'})) {
4925: $unikey.='_'.$token->[2]->{'name'};
4926: }
4927: $metathesekeys{$unikey}=1;
4928: foreach (@{$token->[3]}) {
4929: $metaentry{':'.$unikey.'.'.$_}=$token->[2]->{$_};
4930: }
4931: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
4932: my $default=$metaentry{':'.$unikey.'.default'};
4933: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
4934: # only ws inside the tag, and not in default, so use default
4935: # as value
4936: $metaentry{':'.$unikey}=$default;
4937: } else {
4938: # either something interesting inside the tag or default
4939: # uninteresting
4940: $metaentry{':'.$unikey}=$internaltext;
4941: }
4942: # end of not-a-package not-a-library import
4943: }
4944: # end of not-a-package start tag
4945: }
4946: # the next is the end of "start tag"
4947: }
4948: }
4949: my ($extension) = ($uri =~ /\.(\w+)$/);
4950: foreach my $key (sort(keys(%packagetab))) {
4951: #no specific packages #how's our extension
4952: if ($key!~/^extension_\Q$extension\E&/) { next; }
4953: &metadata_create_package_def($uri,$key,'extension_'.$extension,
4954: \%metathesekeys);
4955: }
4956: if (!exists($metaentry{':packages'})) {
4957: foreach my $key (sort(keys(%packagetab))) {
4958: #no specific packages well let's get default then
4959: if ($key!~/^default&/) { next; }
4960: &metadata_create_package_def($uri,$key,'default',
4961: \%metathesekeys);
4962: }
4963: }
4964: # are there custom rights to evaluate
4965: if ($metaentry{':copyright'} eq 'custom') {
4966:
4967: #
4968: # Importing a rights file here
4969: #
4970: unless ($depthcount) {
4971: my $location=$metaentry{':customdistributionfile'};
4972: my $dir=$filename;
4973: $dir=~s|[^/]*$||;
4974: $location=&filelocation($dir,$location);
4975: foreach (sort(split(/\,/,&metadata($uri,'keys',
4976: $location,'_rights',
4977: $depthcount+1)))) {
4978: #$metaentry{':'.$_}=$metacache{$uri}->{':'.$_};
4979: $metathesekeys{$_}=1;
4980: }
4981: }
4982: }
4983: $metaentry{':keys'}=join(',',keys %metathesekeys);
4984: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
4985: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
4986: &do_cache_new('meta',$uri,\%metaentry,60*60*24);
4987: # this is the end of "was not already recently cached
4988: }
4989: return $metaentry{':'.$what};
4990: }
4991:
4992: sub metadata_create_package_def {
4993: my ($uri,$key,$package,$metathesekeys)=@_;
4994: my ($pack,$name,$subp)=split(/\&/,$key);
4995: if ($subp eq 'default') { next; }
4996:
4997: if (defined($metaentry{':packages'})) {
4998: $metaentry{':packages'}.=','.$package;
4999: } else {
5000: $metaentry{':packages'}=$package;
5001: }
5002: my $value=$packagetab{$key};
5003: my $unikey;
5004: $unikey='parameter_0_'.$name;
5005: $metaentry{':'.$unikey.'.part'}=0;
5006: $$metathesekeys{$unikey}=1;
5007: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
5008: $metaentry{':'.$unikey.'.'.$subp}=$value;
5009: }
5010: if (defined($metaentry{':'.$unikey.'.default'})) {
5011: $metaentry{':'.$unikey}=
5012: $metaentry{':'.$unikey.'.default'};
5013: }
5014: }
5015:
5016: sub metadata_generate_part0 {
5017: my ($metadata,$metacache,$uri) = @_;
5018: my %allnames;
5019: foreach my $metakey (sort keys %$metadata) {
5020: if ($metakey=~/^parameter\_(.*)/) {
5021: my $part=$$metacache{':'.$metakey.'.part'};
5022: my $name=$$metacache{':'.$metakey.'.name'};
5023: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
5024: $allnames{$name}=$part;
5025: }
5026: }
5027: }
5028: foreach my $name (keys(%allnames)) {
5029: $$metadata{"parameter_0_$name"}=1;
5030: my $key=":parameter_0_$name";
5031: $$metacache{"$key.part"}='0';
5032: $$metacache{"$key.name"}=$name;
5033: $$metacache{"$key.type"}=$$metacache{':parameter_'.
5034: $allnames{$name}.'_'.$name.
5035: '.type'};
5036: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
5037: '.display'};
5038: my $expr='[Part: '.$allnames{$name}.']';
5039: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
5040: $$metacache{"$key.display"}=$olddis;
5041: }
5042: }
5043:
5044: # ------------------------------------------------- Get the title of a resource
5045:
5046: sub gettitle {
5047: my $urlsymb=shift;
5048: my $symb=&symbread($urlsymb);
5049: if ($symb) {
5050: my $key=$env{'request.course.id'}."\0".$symb;
5051: my ($result,$cached)=&is_cached_new('title',$key);
5052: if (defined($cached)) {
5053: return $result;
5054: }
5055: my ($map,$resid,$url)=&decode_symb($symb);
5056: my $title='';
5057: my %bighash;
5058: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5059: &GDBM_READER(),0640)) {
5060: my $mapid=$bighash{'map_pc_'.&clutter($map)};
5061: $title=$bighash{'title_'.$mapid.'.'.$resid};
5062: untie %bighash;
5063: }
5064: $title=~s/\&colon\;/\:/gs;
5065: if ($title) {
5066: return &do_cache_new('title',$key,$title,600);
5067: }
5068: $urlsymb=$url;
5069: }
5070: my $title=&metadata($urlsymb,'title');
5071: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
5072: return $title;
5073: }
5074:
5075: sub get_slot {
5076: my ($which,$cnum,$cdom)=@_;
5077: if (!$cnum || !$cdom) {
5078: (undef,my $courseid)=&Apache::lonxml::whichuser();
5079: $cdom=$env{'course.'.$courseid.'.domain'};
5080: $cnum=$env{'course.'.$courseid.'.num'};
5081: }
5082: my %slotinfo=&get('slots',[$which],$cdom,$cnum);
5083: &Apache::lonhomework::showhash(%slotinfo);
5084: my ($tmp)=keys(%slotinfo);
5085: if ($tmp=~/^error:/) { return (); }
5086: if (ref($slotinfo{$which}) eq 'HASH') {
5087: return %{$slotinfo{$which}};
5088: }
5089: return $slotinfo{$which};
5090: }
5091: # ------------------------------------------------- Update symbolic store links
5092:
5093: sub symblist {
5094: my ($mapname,%newhash)=@_;
5095: $mapname=&deversion(&declutter($mapname));
5096: my %hash;
5097: if (($env{'request.course.fn'}) && (%newhash)) {
5098: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5099: &GDBM_WRCREAT(),0640)) {
5100: foreach (keys %newhash) {
5101: $hash{declutter($_)}=&encode_symb($mapname,$newhash{$_}->[1],
5102: $newhash{$_}->[0]);
5103: }
5104: if (untie(%hash)) {
5105: return 'ok';
5106: }
5107: }
5108: }
5109: return 'error';
5110: }
5111:
5112: # --------------------------------------------------------------- Verify a symb
5113:
5114: sub symbverify {
5115: my ($symb,$thisurl)=@_;
5116: my $thisfn=$thisurl;
5117: # wrapper not part of symbs
5118: $thisfn=~s/^\/adm\/wrapper//;
5119: $thisfn=&declutter($thisfn);
5120: # direct jump to resource in page or to a sequence - will construct own symbs
5121: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
5122: # check URL part
5123: my ($map,$resid,$url)=&decode_symb($symb);
5124:
5125: unless ($url eq $thisfn) { return 0; }
5126:
5127: $symb=&symbclean($symb);
5128: $thisurl=&deversion($thisurl);
5129: $thisfn=&deversion($thisfn);
5130:
5131: my %bighash;
5132: my $okay=0;
5133:
5134: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5135: &GDBM_READER(),0640)) {
5136: my $ids=$bighash{'ids_'.&clutter($thisurl)};
5137: unless ($ids) {
5138: $ids=$bighash{'ids_/'.$thisurl};
5139: }
5140: if ($ids) {
5141: # ------------------------------------------------------------------- Has ID(s)
5142: foreach (split(/\,/,$ids)) {
5143: my ($mapid,$resid)=split(/\./,$_);
5144: if (
5145: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
5146: eq $symb) {
5147: if (($env{'request.role.adv'}) ||
5148: $bighash{'encrypted_'.$_} eq $env{'request.enc'}) {
5149: $okay=1;
5150: }
5151: }
5152: }
5153: }
5154: untie(%bighash);
5155: }
5156: return $okay;
5157: }
5158:
5159: # --------------------------------------------------------------- Clean-up symb
5160:
5161: sub symbclean {
5162: my $symb=shift;
5163: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
5164: # remove version from map
5165: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
5166:
5167: # remove version from URL
5168: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
5169:
5170: # remove wrapper
5171:
5172: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
5173: return $symb;
5174: }
5175:
5176: # ---------------------------------------------- Split symb to find map and url
5177:
5178: sub encode_symb {
5179: my ($map,$resid,$url)=@_;
5180: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
5181: }
5182:
5183: sub decode_symb {
5184: my $symb=shift;
5185: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
5186: my ($map,$resid,$url)=split(/___/,$symb);
5187: return (&fixversion($map),$resid,&fixversion($url));
5188: }
5189:
5190: sub fixversion {
5191: my $fn=shift;
5192: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
5193: my %bighash;
5194: my $uri=&clutter($fn);
5195: my $key=$env{'request.course.id'}.'_'.$uri;
5196: # is this cached?
5197: my ($result,$cached)=&is_cached_new('courseresversion',$key);
5198: if (defined($cached)) { return $result; }
5199: # unfortunately not cached, or expired
5200: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5201: &GDBM_READER(),0640)) {
5202: if ($bighash{'version_'.$uri}) {
5203: my $version=$bighash{'version_'.$uri};
5204: unless (($version eq 'mostrecent') ||
5205: ($version==&getversion($uri))) {
5206: $uri=~s/\.(\w+)$/\.$version\.$1/;
5207: }
5208: }
5209: untie %bighash;
5210: }
5211: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
5212: }
5213:
5214: sub deversion {
5215: my $url=shift;
5216: $url=~s/\.\d+\.(\w+)$/\.$1/;
5217: return $url;
5218: }
5219:
5220: # ------------------------------------------------------ Return symb list entry
5221:
5222: sub symbread {
5223: my ($thisfn,$donotrecurse)=@_;
5224: my $cache_str='request.symbread.cached.'.$thisfn;
5225: if (defined($env{$cache_str})) { return $env{$cache_str}; }
5226: # no filename provided? try from environment
5227: unless ($thisfn) {
5228: if ($env{'request.symb'}) {
5229: return $env{$cache_str}=&symbclean($env{'request.symb'});
5230: }
5231: $thisfn=$env{'request.filename'};
5232: }
5233: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
5234: # is that filename actually a symb? Verify, clean, and return
5235: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
5236: if (&symbverify($thisfn,$1)) {
5237: return $env{$cache_str}=&symbclean($thisfn);
5238: }
5239: }
5240: $thisfn=declutter($thisfn);
5241: my %hash;
5242: my %bighash;
5243: my $syval='';
5244: if (($env{'request.course.fn'}) && ($thisfn)) {
5245: my $targetfn = $thisfn;
5246: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
5247: $targetfn = 'adm/wrapper/'.$thisfn;
5248: }
5249: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5250: &GDBM_READER(),0640)) {
5251: $syval=$hash{$targetfn};
5252: untie(%hash);
5253: }
5254: # ---------------------------------------------------------- There was an entry
5255: if ($syval) {
5256: #unless ($syval=~/\_\d+$/) {
5257: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
5258: #&appenv('request.ambiguous' => $thisfn);
5259: #return $env{$cache_str}='';
5260: #}
5261: #$syval.=$1;
5262: #}
5263: } else {
5264: # ------------------------------------------------------- Was not in symb table
5265: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5266: &GDBM_READER(),0640)) {
5267: # ---------------------------------------------- Get ID(s) for current resource
5268: my $ids=$bighash{'ids_'.&clutter($thisfn)};
5269: unless ($ids) {
5270: $ids=$bighash{'ids_/'.$thisfn};
5271: }
5272: unless ($ids) {
5273: # alias?
5274: $ids=$bighash{'mapalias_'.$thisfn};
5275: }
5276: if ($ids) {
5277: # ------------------------------------------------------------------- Has ID(s)
5278: my @possibilities=split(/\,/,$ids);
5279: if ($#possibilities==0) {
5280: # ----------------------------------------------- There is only one possibility
5281: my ($mapid,$resid)=split(/\./,$ids);
5282: $syval=&encode_symb($bighash{'map_id_'.$mapid},
5283: $resid,$thisfn);
5284: } elsif (!$donotrecurse) {
5285: # ------------------------------------------ There is more than one possibility
5286: my $realpossible=0;
5287: foreach (@possibilities) {
5288: my $file=$bighash{'src_'.$_};
5289: if (&allowed('bre',$file)) {
5290: my ($mapid,$resid)=split(/\./,$_);
5291: if ($bighash{'map_type_'.$mapid} ne 'page') {
5292: $realpossible++;
5293: $syval=&encode_symb($bighash{'map_id_'.$mapid},
5294: $resid,$thisfn);
5295: }
5296: }
5297: }
5298: if ($realpossible!=1) { $syval=''; }
5299: } else {
5300: $syval='';
5301: }
5302: }
5303: untie(%bighash)
5304: }
5305: }
5306: if ($syval) {
5307: return $env{$cache_str}=$syval;
5308: }
5309: }
5310: &appenv('request.ambiguous' => $thisfn);
5311: return $env{$cache_str}='';
5312: }
5313:
5314: # ---------------------------------------------------------- Return random seed
5315:
5316: sub numval {
5317: my $txt=shift;
5318: $txt=~tr/A-J/0-9/;
5319: $txt=~tr/a-j/0-9/;
5320: $txt=~tr/K-T/0-9/;
5321: $txt=~tr/k-t/0-9/;
5322: $txt=~tr/U-Z/0-5/;
5323: $txt=~tr/u-z/0-5/;
5324: $txt=~s/\D//g;
5325: if ($_64bit) { if ($txt > 2**32) { return -1; } }
5326: return int($txt);
5327: }
5328:
5329: sub numval2 {
5330: my $txt=shift;
5331: $txt=~tr/A-J/0-9/;
5332: $txt=~tr/a-j/0-9/;
5333: $txt=~tr/K-T/0-9/;
5334: $txt=~tr/k-t/0-9/;
5335: $txt=~tr/U-Z/0-5/;
5336: $txt=~tr/u-z/0-5/;
5337: $txt=~s/\D//g;
5338: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5339: my $total;
5340: foreach my $val (@txts) { $total+=$val; }
5341: if ($_64bit) { if ($total > 2**32) { return -1; } }
5342: return int($total);
5343: }
5344:
5345: sub numval3 {
5346: use integer;
5347: my $txt=shift;
5348: $txt=~tr/A-J/0-9/;
5349: $txt=~tr/a-j/0-9/;
5350: $txt=~tr/K-T/0-9/;
5351: $txt=~tr/k-t/0-9/;
5352: $txt=~tr/U-Z/0-5/;
5353: $txt=~tr/u-z/0-5/;
5354: $txt=~s/\D//g;
5355: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5356: my $total;
5357: foreach my $val (@txts) { $total+=$val; }
5358: if ($_64bit) { $total=(($total<<32)>>32); }
5359: return $total;
5360: }
5361:
5362: sub latest_rnd_algorithm_id {
5363: return '64bit4';
5364: }
5365:
5366: sub get_rand_alg {
5367: my ($courseid)=@_;
5368: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
5369: if ($courseid) {
5370: return $env{"course.$courseid.rndseed"};
5371: }
5372: return &latest_rnd_algorithm_id();
5373: }
5374:
5375: sub validCODE {
5376: my ($CODE)=@_;
5377: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
5378: return 0;
5379: }
5380:
5381: sub getCODE {
5382: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
5383: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
5384: defined($Apache::lonhomework::parsing_a_task) ) &&
5385: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
5386: return $Apache::lonhomework::history{'resource.CODE'};
5387: }
5388: return undef;
5389: }
5390:
5391: sub rndseed {
5392: my ($symb,$courseid,$domain,$username)=@_;
5393:
5394: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
5395: if (!$symb) {
5396: unless ($symb=$wsymb) { return time; }
5397: }
5398: if (!$courseid) { $courseid=$wcourseid; }
5399: if (!$domain) { $domain=$wdomain; }
5400: if (!$username) { $username=$wusername }
5401: my $which=&get_rand_alg();
5402: if (defined(&getCODE())) {
5403: if ($which eq '64bit4') {
5404: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
5405: } else {
5406: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
5407: }
5408: } elsif ($which eq '64bit4') {
5409: return &rndseed_64bit4($symb,$courseid,$domain,$username);
5410: } elsif ($which eq '64bit3') {
5411: return &rndseed_64bit3($symb,$courseid,$domain,$username);
5412: } elsif ($which eq '64bit2') {
5413: return &rndseed_64bit2($symb,$courseid,$domain,$username);
5414: } elsif ($which eq '64bit') {
5415: return &rndseed_64bit($symb,$courseid,$domain,$username);
5416: }
5417: return &rndseed_32bit($symb,$courseid,$domain,$username);
5418: }
5419:
5420: sub rndseed_32bit {
5421: my ($symb,$courseid,$domain,$username)=@_;
5422: {
5423: use integer;
5424: my $symbchck=unpack("%32C*",$symb) << 27;
5425: my $symbseed=numval($symb) << 22;
5426: my $namechck=unpack("%32C*",$username) << 17;
5427: my $nameseed=numval($username) << 12;
5428: my $domainseed=unpack("%32C*",$domain) << 7;
5429: my $courseseed=unpack("%32C*",$courseid);
5430: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
5431: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5432: #&Apache::lonxml::debug("rndseed :$num:$symb");
5433: if ($_64bit) { $num=(($num<<32)>>32); }
5434: return $num;
5435: }
5436: }
5437:
5438: sub rndseed_64bit {
5439: my ($symb,$courseid,$domain,$username)=@_;
5440: {
5441: use integer;
5442: my $symbchck=unpack("%32S*",$symb) << 21;
5443: my $symbseed=numval($symb) << 10;
5444: my $namechck=unpack("%32S*",$username);
5445:
5446: my $nameseed=numval($username) << 21;
5447: my $domainseed=unpack("%32S*",$domain) << 10;
5448: my $courseseed=unpack("%32S*",$courseid);
5449:
5450: my $num1=$symbchck+$symbseed+$namechck;
5451: my $num2=$nameseed+$domainseed+$courseseed;
5452: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5453: #&Apache::lonxml::debug("rndseed :$num:$symb");
5454: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5455: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5456: return "$num1,$num2";
5457: }
5458: }
5459:
5460: sub rndseed_64bit2 {
5461: my ($symb,$courseid,$domain,$username)=@_;
5462: {
5463: use integer;
5464: # strings need to be an even # of cahracters long, it it is odd the
5465: # last characters gets thrown away
5466: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5467: my $symbseed=numval($symb) << 10;
5468: my $namechck=unpack("%32S*",$username.' ');
5469:
5470: my $nameseed=numval($username) << 21;
5471: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5472: my $courseseed=unpack("%32S*",$courseid.' ');
5473:
5474: my $num1=$symbchck+$symbseed+$namechck;
5475: my $num2=$nameseed+$domainseed+$courseseed;
5476: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5477: #&Apache::lonxml::debug("rndseed :$num:$symb");
5478: return "$num1,$num2";
5479: }
5480: }
5481:
5482: sub rndseed_64bit3 {
5483: my ($symb,$courseid,$domain,$username)=@_;
5484: {
5485: use integer;
5486: # strings need to be an even # of cahracters long, it it is odd the
5487: # last characters gets thrown away
5488: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5489: my $symbseed=numval2($symb) << 10;
5490: my $namechck=unpack("%32S*",$username.' ');
5491:
5492: my $nameseed=numval2($username) << 21;
5493: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5494: my $courseseed=unpack("%32S*",$courseid.' ');
5495:
5496: my $num1=$symbchck+$symbseed+$namechck;
5497: my $num2=$nameseed+$domainseed+$courseseed;
5498: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5499: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5500: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5501:
5502: return "$num1:$num2";
5503: }
5504: }
5505:
5506: sub rndseed_64bit4 {
5507: my ($symb,$courseid,$domain,$username)=@_;
5508: {
5509: use integer;
5510: # strings need to be an even # of cahracters long, it it is odd the
5511: # last characters gets thrown away
5512: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5513: my $symbseed=numval3($symb) << 10;
5514: my $namechck=unpack("%32S*",$username.' ');
5515:
5516: my $nameseed=numval3($username) << 21;
5517: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5518: my $courseseed=unpack("%32S*",$courseid.' ');
5519:
5520: my $num1=$symbchck+$symbseed+$namechck;
5521: my $num2=$nameseed+$domainseed+$courseseed;
5522: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5523: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5524: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5525:
5526: return "$num1:$num2";
5527: }
5528: }
5529:
5530: sub rndseed_CODE_64bit {
5531: my ($symb,$courseid,$domain,$username)=@_;
5532: {
5533: use integer;
5534: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5535: my $symbseed=numval2($symb);
5536: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5537: my $CODEseed=numval(&getCODE());
5538: my $courseseed=unpack("%32S*",$courseid.' ');
5539: my $num1=$symbseed+$CODEchck;
5540: my $num2=$CODEseed+$courseseed+$symbchck;
5541: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5542: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5543: if ($_64bit) { $num1=(($num1<<32)>>32); }
5544: if ($_64bit) { $num2=(($num2<<32)>>32); }
5545: return "$num1:$num2";
5546: }
5547: }
5548:
5549: sub rndseed_CODE_64bit4 {
5550: my ($symb,$courseid,$domain,$username)=@_;
5551: {
5552: use integer;
5553: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5554: my $symbseed=numval3($symb);
5555: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5556: my $CODEseed=numval3(&getCODE());
5557: my $courseseed=unpack("%32S*",$courseid.' ');
5558: my $num1=$symbseed+$CODEchck;
5559: my $num2=$CODEseed+$courseseed+$symbchck;
5560: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5561: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5562: if ($_64bit) { $num1=(($num1<<32)>>32); }
5563: if ($_64bit) { $num2=(($num2<<32)>>32); }
5564: return "$num1:$num2";
5565: }
5566: }
5567:
5568: sub setup_random_from_rndseed {
5569: my ($rndseed)=@_;
5570: if ($rndseed =~/([,:])/) {
5571: my ($num1,$num2)=split(/[,:]/,$rndseed);
5572: &Math::Random::random_set_seed(abs($num1),abs($num2));
5573: } else {
5574: &Math::Random::random_set_seed_from_phrase($rndseed);
5575: }
5576: }
5577:
5578: sub latest_receipt_algorithm_id {
5579: return 'receipt2';
5580: }
5581:
5582: sub recunique {
5583: my $fucourseid=shift;
5584: my $unique;
5585: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5586: $unique=$env{"course.$fucourseid.internal.encseed"};
5587: } else {
5588: $unique=$perlvar{'lonReceipt'};
5589: }
5590: return unpack("%32C*",$unique);
5591: }
5592:
5593: sub recprefix {
5594: my $fucourseid=shift;
5595: my $prefix;
5596: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5597: $prefix=$env{"course.$fucourseid.internal.encpref"};
5598: } else {
5599: $prefix=$perlvar{'lonHostID'};
5600: }
5601: return unpack("%32C*",$prefix);
5602: }
5603:
5604: sub ireceipt {
5605: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
5606: my $cuname=unpack("%32C*",$funame);
5607: my $cudom=unpack("%32C*",$fudom);
5608: my $cucourseid=unpack("%32C*",$fucourseid);
5609: my $cusymb=unpack("%32C*",$fusymb);
5610: my $cunique=&recunique($fucourseid);
5611: my $cpart=unpack("%32S*",$part);
5612: my $return =&recprefix($fucourseid).'-';
5613: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
5614: $env{'request.state'} eq 'construct') {
5615: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
5616: " and ".($cpart%$cudom));
5617:
5618: $return.= ($cunique%$cuname+
5619: $cunique%$cudom+
5620: $cusymb%$cuname+
5621: $cusymb%$cudom+
5622: $cucourseid%$cuname+
5623: $cucourseid%$cudom+
5624: $cpart%$cuname+
5625: $cpart%$cudom);
5626: } else {
5627: $return.= ($cunique%$cuname+
5628: $cunique%$cudom+
5629: $cusymb%$cuname+
5630: $cusymb%$cudom+
5631: $cucourseid%$cuname+
5632: $cucourseid%$cudom);
5633: }
5634: return $return;
5635: }
5636:
5637: sub receipt {
5638: my ($part)=@_;
5639: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
5640: return &ireceipt($name,$domain,$courseid,$symb,$part);
5641: }
5642:
5643: # ------------------------------------------------------------ Serves up a file
5644: # returns either the contents of the file or
5645: # -1 if the file doesn't exist
5646: #
5647: # if the target is a file that was uploaded via DOCS,
5648: # a check will be made to see if a current copy exists on the local server,
5649: # if it does this will be served, otherwise a copy will be retrieved from
5650: # the home server for the course and stored in /home/httpd/html/userfiles on
5651: # the local server.
5652:
5653: sub getfile {
5654: my ($file) = @_;
5655: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
5656: &repcopy($file);
5657: return &readfile($file);
5658: }
5659:
5660: sub repcopy_userfile {
5661: my ($file)=@_;
5662: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
5663: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
5664: my ($cdom,$cnum,$filename) =
5665: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
5666: my ($info,$rtncode);
5667: my $uri="/uploaded/$cdom/$cnum/$filename";
5668: if (-e "$file") {
5669: my @fileinfo = stat($file);
5670: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
5671: if ($lwpresp ne 'ok') {
5672: if ($rtncode eq '404') {
5673: unlink($file);
5674: }
5675: #my $ua=new LWP::UserAgent;
5676: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5677: #my $response=$ua->request($request);
5678: #if ($response->is_success()) {
5679: # return $response->content;
5680: # } else {
5681: # return -1;
5682: # }
5683: return -1;
5684: }
5685: if ($info < $fileinfo[9]) {
5686: return 'ok';
5687: }
5688: $info = '';
5689: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5690: if ($lwpresp ne 'ok') {
5691: return -1;
5692: }
5693: } else {
5694: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5695: if ($lwpresp ne 'ok') {
5696: my $ua=new LWP::UserAgent;
5697: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5698: my $response=$ua->request($request);
5699: if ($response->is_success()) {
5700: $info=$response->content;
5701: } else {
5702: return -1;
5703: }
5704: }
5705: my @parts = ($cdom,$cnum);
5706: if ($filename =~ m|^(.+)/[^/]+$|) {
5707: push @parts, split(/\//,$1);
5708: }
5709: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
5710: foreach my $part (@parts) {
5711: $path .= '/'.$part;
5712: if (!-e $path) {
5713: mkdir($path,0770);
5714: }
5715: }
5716: }
5717: open(FILE,">$file");
5718: print FILE $info;
5719: close(FILE);
5720: return 'ok';
5721: }
5722:
5723: sub tokenwrapper {
5724: my $uri=shift;
5725: $uri=~s|^http\://([^/]+)||;
5726: $uri=~s|^/||;
5727: $env{'user.environment'}=~/\/([^\/]+)\.id/;
5728: my $token=$1;
5729: my (undef,$udom,$uname,$file)=split('/',$uri,4);
5730: if ($udom && $uname && $file) {
5731: $file=~s|(\?\.*)*$||;
5732: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
5733: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
5734: (($uri=~/\?/)?'&':'?').'token='.$token.
5735: '&tokenissued='.$perlvar{'lonHostID'};
5736: } else {
5737: return '/adm/notfound.html';
5738: }
5739: }
5740:
5741: sub getuploaded {
5742: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
5743: $uri=~s/^\///;
5744: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
5745: my $ua=new LWP::UserAgent;
5746: my $request=new HTTP::Request($reqtype,$uri);
5747: my $response=$ua->request($request);
5748: $$rtncode = $response->code;
5749: if (! $response->is_success()) {
5750: return 'failed';
5751: }
5752: if ($reqtype eq 'HEAD') {
5753: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
5754: } elsif ($reqtype eq 'GET') {
5755: $$info = $response->content;
5756: }
5757: return 'ok';
5758: }
5759:
5760: sub readfile {
5761: my $file = shift;
5762: if ( (! -e $file ) || ($file eq '') ) { return -1; };
5763: my $fh;
5764: open($fh,"<$file");
5765: my $a='';
5766: while (<$fh>) { $a .=$_; }
5767: return $a;
5768: }
5769:
5770: sub filelocation {
5771: my ($dir,$file) = @_;
5772: my $location;
5773: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
5774: if ($file=~m:^/~:) { # is a contruction space reference
5775: $location = $file;
5776: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
5777: } elsif ($file=~m:^/home/[^/]*/public_html/:) {
5778: # is a correct contruction space reference
5779: $location = $file;
5780: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
5781: my ($udom,$uname,$filename)=
5782: ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
5783: my $home=&homeserver($uname,$udom);
5784: my $is_me=0;
5785: my @ids=¤t_machine_ids();
5786: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
5787: if ($is_me) {
5788: $location=&Apache::loncommon::propath($udom,$uname).
5789: '/userfiles/'.$filename;
5790: } else {
5791: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
5792: $udom.'/'.$uname.'/'.$filename;
5793: }
5794: } else {
5795: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5796: $file=~s:^/res/:/:;
5797: if ( !( $file =~ m:^/:) ) {
5798: $location = $dir. '/'.$file;
5799: } else {
5800: $location = '/home/httpd/html/res'.$file;
5801: }
5802: }
5803: $location=~s://+:/:g; # remove duplicate /
5804: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
5805: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
5806: return $location;
5807: }
5808:
5809: sub hreflocation {
5810: my ($dir,$file)=@_;
5811: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
5812: $file=filelocation($dir,$file);
5813: }
5814: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
5815: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
5816: } elsif ($file=~m-/home/(\w+)/public_html/-) {
5817: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
5818: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
5819: $file=~s-^/home/httpd/lonUsers/([^/]*)/./././([^/]*)/userfiles/
5820: -/uploaded/$1/$2/-x;
5821: }
5822: return $file;
5823: }
5824:
5825: sub current_machine_domains {
5826: my $hostname=$hostname{$perlvar{'lonHostID'}};
5827: my @domains;
5828: while( my($id, $name) = each(%hostname)) {
5829: # &logthis("-$id-$name-$hostname-");
5830: if ($hostname eq $name) {
5831: push(@domains,$hostdom{$id});
5832: }
5833: }
5834: return @domains;
5835: }
5836:
5837: sub current_machine_ids {
5838: my $hostname=$hostname{$perlvar{'lonHostID'}};
5839: my @ids;
5840: while( my($id, $name) = each(%hostname)) {
5841: # &logthis("-$id-$name-$hostname-");
5842: if ($hostname eq $name) {
5843: push(@ids,$id);
5844: }
5845: }
5846: return @ids;
5847: }
5848:
5849: # ------------------------------------------------------------- Declutters URLs
5850:
5851: sub declutter {
5852: my $thisfn=shift;
5853: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
5854: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5855: $thisfn=~s/^\///;
5856: $thisfn=~s/^res\///;
5857: $thisfn=~s/\?.+$//;
5858: return $thisfn;
5859: }
5860:
5861: # ------------------------------------------------------------- Clutter up URLs
5862:
5863: sub clutter {
5864: my $thisfn='/'.&declutter(shift);
5865: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
5866: $thisfn='/res'.$thisfn;
5867: }
5868: return $thisfn;
5869: }
5870:
5871: sub freeze_escape {
5872: my ($value)=@_;
5873: if (ref($value)) {
5874: $value=&nfreeze($value);
5875: return '__FROZEN__'.&escape($value);
5876: }
5877: return &escape($value);
5878: }
5879:
5880: # -------------------------------------------------------- Escape Special Chars
5881:
5882: sub escape {
5883: my $str=shift;
5884: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
5885: return $str;
5886: }
5887:
5888: # ----------------------------------------------------- Un-Escape Special Chars
5889:
5890: sub unescape {
5891: my $str=shift;
5892: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
5893: return $str;
5894: }
5895:
5896: sub thaw_unescape {
5897: my ($value)=@_;
5898: if ($value =~ /^__FROZEN__/) {
5899: substr($value,0,10,undef);
5900: $value=&unescape($value);
5901: return &thaw($value);
5902: }
5903: return &unescape($value);
5904: }
5905:
5906: sub mod_perl_version {
5907: return 1;
5908: if (defined($perlvar{'MODPERL2'})) {
5909: return 2;
5910: }
5911: }
5912:
5913: sub correct_line_ends {
5914: my ($result)=@_;
5915: $$result =~s/\r\n/\n/mg;
5916: $$result =~s/\r/\n/mg;
5917: }
5918: # ================================================================ Main Program
5919:
5920: sub goodbye {
5921: &logthis("Starting Shut down");
5922: #not converted to using infrastruture and probably shouldn't be
5923: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
5924: #converted
5925: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
5926: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
5927: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
5928: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
5929: #1.1 only
5930: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
5931: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
5932: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
5933: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
5934: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
5935: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
5936: &logthis(sprintf("%-20s is %s",'hits',$hits));
5937: &flushcourselogs();
5938: &logthis("Shutting down");
5939: return DONE;
5940: }
5941:
5942: BEGIN {
5943: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
5944: unless ($readit) {
5945: {
5946: # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
5947: open(my $config,"</etc/httpd/conf/loncapa.conf");
5948:
5949: while (my $configline=<$config>) {
5950: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
5951: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5952: chomp($varvalue);
5953: $perlvar{$varname}=$varvalue;
5954: }
5955: }
5956: close($config);
5957: }
5958: {
5959: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
5960:
5961: while (my $configline=<$config>) {
5962: if ($configline =~ /^[^\#]*PerlSetVar/) {
5963: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5964: chomp($varvalue);
5965: $perlvar{$varname}=$varvalue;
5966: }
5967: }
5968: close($config);
5969: }
5970:
5971: # ------------------------------------------------------------ Read domain file
5972: {
5973: %domaindescription = ();
5974: %domain_auth_def = ();
5975: %domain_auth_arg_def = ();
5976: my $fh;
5977: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
5978: while (<$fh>) {
5979: next if (/^(\#|\s*$)/);
5980: # next if /^\#/;
5981: chomp;
5982: my ($domain, $domain_description, $def_auth, $def_auth_arg,
5983: $def_lang, $city, $longi, $lati) = split(/:/,$_);
5984: $domain_auth_def{$domain}=$def_auth;
5985: $domain_auth_arg_def{$domain}=$def_auth_arg;
5986: $domaindescription{$domain}=$domain_description;
5987: $domain_lang_def{$domain}=$def_lang;
5988: $domain_city{$domain}=$city;
5989: $domain_longi{$domain}=$longi;
5990: $domain_lati{$domain}=$lati;
5991:
5992: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
5993: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
5994: }
5995: }
5996: close ($fh);
5997: }
5998:
5999:
6000: # ------------------------------------------------------------- Read hosts file
6001: {
6002: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
6003:
6004: while (my $configline=<$config>) {
6005: next if ($configline =~ /^(\#|\s*$)/);
6006: chomp($configline);
6007: my ($id,$domain,$role,$name)=split(/:/,$configline);
6008: $name=~s/\s//g;
6009: if ($id && $domain && $role && $name) {
6010: $hostname{$id}=$name;
6011: $hostdom{$id}=$domain;
6012: if ($role eq 'library') { $libserv{$id}=$name; }
6013: }
6014: }
6015: close($config);
6016: # FIXME: dev server don't want this, production servers _do_ want this
6017: #&get_iphost();
6018: }
6019:
6020: sub get_iphost {
6021: if (%iphost) { return %iphost; }
6022: my %name_to_ip;
6023: foreach my $id (keys(%hostname)) {
6024: my $name=$hostname{$id};
6025: my $ip;
6026: if (!exists($name_to_ip{$name})) {
6027: $ip = gethostbyname($name);
6028: if (!$ip || length($ip) ne 4) {
6029: &logthis("Skipping host $id name $name no IP found\n");
6030: next;
6031: }
6032: $ip=inet_ntoa($ip);
6033: $name_to_ip{$name} = $ip;
6034: } else {
6035: $ip = $name_to_ip{$name};
6036: }
6037: push(@{$iphost{$ip}},$id);
6038: }
6039: return %iphost;
6040: }
6041:
6042: # ------------------------------------------------------ Read spare server file
6043: {
6044: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
6045:
6046: while (my $configline=<$config>) {
6047: chomp($configline);
6048: if ($configline) {
6049: $spareid{$configline}=1;
6050: }
6051: }
6052: close($config);
6053: }
6054: # ------------------------------------------------------------ Read permissions
6055: {
6056: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
6057:
6058: while (my $configline=<$config>) {
6059: chomp($configline);
6060: if ($configline) {
6061: my ($role,$perm)=split(/ /,$configline);
6062: if ($perm ne '') { $pr{$role}=$perm; }
6063: }
6064: }
6065: close($config);
6066: }
6067:
6068: # -------------------------------------------- Read plain texts for permissions
6069: {
6070: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
6071:
6072: while (my $configline=<$config>) {
6073: chomp($configline);
6074: if ($configline) {
6075: my ($short,$plain)=split(/:/,$configline);
6076: if ($plain ne '') { $prp{$short}=$plain; }
6077: }
6078: }
6079: close($config);
6080: }
6081:
6082: # ---------------------------------------------------------- Read package table
6083: {
6084: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
6085:
6086: while (my $configline=<$config>) {
6087: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
6088: chomp($configline);
6089: my ($short,$plain)=split(/:/,$configline);
6090: my ($pack,$name)=split(/\&/,$short);
6091: if ($plain ne '') {
6092: $packagetab{$pack.'&'.$name.'&name'}=$name;
6093: $packagetab{$short}=$plain;
6094: }
6095: }
6096: close($config);
6097: }
6098:
6099: # ------------- set up temporary directory
6100: {
6101: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
6102:
6103: }
6104:
6105: $memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
6106:
6107: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
6108: $dumpcount=0;
6109:
6110: &logtouch();
6111: &logthis('<font color=yellow>INFO: Read configuration</font>');
6112: $readit=1;
6113: {
6114: use integer;
6115: my $test=(2**32)+1;
6116: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
6117: &logthis(" Detected 64bit platform ($_64bit)");
6118: }
6119: }
6120: }
6121:
6122: 1;
6123: __END__
6124:
6125: =pod
6126:
6127: =head1 NAME
6128:
6129: Apache::lonnet - Subroutines to ask questions about things in the network.
6130:
6131: =head1 SYNOPSIS
6132:
6133: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
6134:
6135: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
6136:
6137: Common parameters:
6138:
6139: =over 4
6140:
6141: =item *
6142:
6143: $uname : an internal username (if $cname expecting a course Id specifically)
6144:
6145: =item *
6146:
6147: $udom : a domain (if $cdom expecting a course's domain specifically)
6148:
6149: =item *
6150:
6151: $symb : a resource instance identifier
6152:
6153: =item *
6154:
6155: $namespace : the name of a .db file that contains the data needed or
6156: being set.
6157:
6158: =back
6159:
6160: =head1 OVERVIEW
6161:
6162: lonnet provides subroutines which interact with the
6163: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
6164: about classes, users, and resources.
6165:
6166: For many of these objects you can also use this to store data about
6167: them or modify them in various ways.
6168:
6169: =head2 Symbs
6170:
6171: To identify a specific instance of a resource, LON-CAPA uses symbols
6172: or "symbs"X<symb>. These identifiers are built from the URL of the
6173: map, the resource number of the resource in the map, and the URL of
6174: the resource itself. The latter is somewhat redundant, but might help
6175: if maps change.
6176:
6177: An example is
6178:
6179: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
6180:
6181: The respective map entry is
6182:
6183: <resource id="19" src="/res/msu/korte/tests/part12.problem"
6184: title="Problem 2">
6185: </resource>
6186:
6187: Symbs are used by the random number generator, as well as to store and
6188: restore data specific to a certain instance of for example a problem.
6189:
6190: =head2 Storing And Retrieving Data
6191:
6192: X<store()>X<cstore()>X<restore()>Three of the most important functions
6193: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
6194: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
6195: is is the non-critical message twin of cstore. These functions are for
6196: handlers to store a perl hash to a user's permanent data space in an
6197: easy manner, and to retrieve it again on another call. It is expected
6198: that a handler would use this once at the beginning to retrieve data,
6199: and then again once at the end to send only the new data back.
6200:
6201: The data is stored in the user's data directory on the user's
6202: homeserver under the ID of the course.
6203:
6204: The hash that is returned by restore will have all of the previous
6205: value for all of the elements of the hash.
6206:
6207: Example:
6208:
6209: #creating a hash
6210: my %hash;
6211: $hash{'foo'}='bar';
6212:
6213: #storing it
6214: &Apache::lonnet::cstore(\%hash);
6215:
6216: #changing a value
6217: $hash{'foo'}='notbar';
6218:
6219: #adding a new value
6220: $hash{'bar'}='foo';
6221: &Apache::lonnet::cstore(\%hash);
6222:
6223: #retrieving the hash
6224: my %history=&Apache::lonnet::restore();
6225:
6226: #print the hash
6227: foreach my $key (sort(keys(%history))) {
6228: print("\%history{$key} = $history{$key}");
6229: }
6230:
6231: Will print out:
6232:
6233: %history{1:foo} = bar
6234: %history{1:keys} = foo:timestamp
6235: %history{1:timestamp} = 990455579
6236: %history{2:bar} = foo
6237: %history{2:foo} = notbar
6238: %history{2:keys} = foo:bar:timestamp
6239: %history{2:timestamp} = 990455580
6240: %history{bar} = foo
6241: %history{foo} = notbar
6242: %history{timestamp} = 990455580
6243: %history{version} = 2
6244:
6245: Note that the special hash entries C<keys>, C<version> and
6246: C<timestamp> were added to the hash. C<version> will be equal to the
6247: total number of versions of the data that have been stored. The
6248: C<timestamp> attribute will be the UNIX time the hash was
6249: stored. C<keys> is available in every historical section to list which
6250: keys were added or changed at a specific historical revision of a
6251: hash.
6252:
6253: B<Warning>: do not store the hash that restore returns directly. This
6254: will cause a mess since it will restore the historical keys as if the
6255: were new keys. I.E. 1:foo will become 1:1:foo etc.
6256:
6257: Calling convention:
6258:
6259: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
6260: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
6261:
6262: For more detailed information, see lonnet specific documentation.
6263:
6264: =head1 RETURN MESSAGES
6265:
6266: =over 4
6267:
6268: =item * B<con_lost>: unable to contact remote host
6269:
6270: =item * B<con_delayed>: unable to contact remote host, message will be delivered
6271: when the connection is brought back up
6272:
6273: =item * B<con_failed>: unable to contact remote host and unable to save message
6274: for later delivery
6275:
6276: =item * B<error:>: an error a occured, a description of the error follows the :
6277:
6278: =item * B<no_such_host>: unable to fund a host associated with the user/domain
6279: that was requested
6280:
6281: =back
6282:
6283: =head1 PUBLIC SUBROUTINES
6284:
6285: =head2 Session Environment Functions
6286:
6287: =over 4
6288:
6289: =item *
6290: X<appenv()>
6291: B<appenv(%hash)>: the value of %hash is written to
6292: the user envirnoment file, and will be restored for each access this
6293: user makes during this session, also modifies the %env for the current
6294: process
6295:
6296: =item *
6297: X<delenv()>
6298: B<delenv($regexp)>: removes all items from the session
6299: environment file that matches the regular expression in $regexp. The
6300: values are also delted from the current processes %env.
6301:
6302: =back
6303:
6304: =head2 User Information
6305:
6306: =over 4
6307:
6308: =item *
6309: X<queryauthenticate()>
6310: B<queryauthenticate($uname,$udom)>: try to determine user's current
6311: authentication scheme
6312:
6313: =item *
6314: X<authenticate()>
6315: B<authenticate($uname,$upass,$udom)>: try to
6316: authenticate user from domain's lib servers (first use the current
6317: one). C<$upass> should be the users password.
6318:
6319: =item *
6320: X<homeserver()>
6321: B<homeserver($uname,$udom)>: find the server which has
6322: the user's directory and files (there must be only one), this caches
6323: the answer, and also caches if there is a borken connection.
6324:
6325: =item *
6326: X<idget()>
6327: B<idget($udom,@ids)>: find the usernames behind a list of IDs
6328: (IDs are a unique resource in a domain, there must be only 1 ID per
6329: username, and only 1 username per ID in a specific domain) (returns
6330: hash: id=>name,id=>name)
6331:
6332: =item *
6333: X<idrget()>
6334: B<idrget($udom,@unames)>: find the IDs behind a list of
6335: usernames (returns hash: name=>id,name=>id)
6336:
6337: =item *
6338: X<idput()>
6339: B<idput($udom,%ids)>: store away a list of names and associated IDs
6340:
6341: =item *
6342: X<rolesinit()>
6343: B<rolesinit($udom,$username,$authhost)>: get user privileges
6344:
6345: =item *
6346: X<getsection()>
6347: B<getsection($udom,$uname,$cname)>: finds the section of student in the
6348: course $cname, return section name/number or '' for "not in course"
6349: and '-1' for "no section"
6350:
6351: =item *
6352: X<userenvironment()>
6353: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
6354: passed in @what from the requested user's environment, returns a hash
6355:
6356: =back
6357:
6358: =head2 User Roles
6359:
6360: =over 4
6361:
6362: =item *
6363:
6364: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
6365: actions
6366: F: full access
6367: U,I,K: authentication modes (cxx only)
6368: '': forbidden
6369: 1: user needs to choose course
6370: 2: browse allowed
6371:
6372: =item *
6373:
6374: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
6375: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
6376: and course level
6377:
6378: =item *
6379:
6380: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
6381: explanation of a user role term
6382:
6383: =back
6384:
6385: =head2 User Modification
6386:
6387: =over 4
6388:
6389: =item *
6390:
6391: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
6392: user for the level given by URL. Optional start and end dates (leave empty
6393: string or zero for "no date")
6394:
6395: =item *
6396:
6397: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
6398: change a users, password, possible return values are: ok,
6399: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
6400: refused
6401:
6402: =item *
6403:
6404: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
6405:
6406: =item *
6407:
6408: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
6409: modify user
6410:
6411: =item *
6412:
6413: modifystudent
6414:
6415: modify a students enrollment and identification information.
6416: The course id is resolved based on the current users environment.
6417: This means the envoking user must be a course coordinator or otherwise
6418: associated with a course.
6419:
6420: This call is essentially a wrapper for lonnet::modifyuser and
6421: lonnet::modify_student_enrollment
6422:
6423: Inputs:
6424:
6425: =over 4
6426:
6427: =item B<$udom> Students loncapa domain
6428:
6429: =item B<$uname> Students loncapa login name
6430:
6431: =item B<$uid> Students id/student number
6432:
6433: =item B<$umode> Students authentication mode
6434:
6435: =item B<$upass> Students password
6436:
6437: =item B<$first> Students first name
6438:
6439: =item B<$middle> Students middle name
6440:
6441: =item B<$last> Students last name
6442:
6443: =item B<$gene> Students generation
6444:
6445: =item B<$usec> Students section in course
6446:
6447: =item B<$end> Unix time of the roles expiration
6448:
6449: =item B<$start> Unix time of the roles start date
6450:
6451: =item B<$forceid> If defined, allow $uid to be changed
6452:
6453: =item B<$desiredhome> server to use as home server for student
6454:
6455: =back
6456:
6457: =item *
6458:
6459: modify_student_enrollment
6460:
6461: Change a students enrollment status in a class. The environment variable
6462: 'role.request.course' must be defined for this function to proceed.
6463:
6464: Inputs:
6465:
6466: =over 4
6467:
6468: =item $udom, students domain
6469:
6470: =item $uname, students name
6471:
6472: =item $uid, students user id
6473:
6474: =item $first, students first name
6475:
6476: =item $middle
6477:
6478: =item $last
6479:
6480: =item $gene
6481:
6482: =item $usec
6483:
6484: =item $end
6485:
6486: =item $start
6487:
6488: =back
6489:
6490:
6491: =item *
6492:
6493: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
6494: custom role; give a custom role to a user for the level given by URL. Specify
6495: name and domain of role author, and role name
6496:
6497: =item *
6498:
6499: revokerole($udom,$uname,$url,$role) : revoke a role for url
6500:
6501: =item *
6502:
6503: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
6504:
6505: =back
6506:
6507: =head2 Course Infomation
6508:
6509: =over 4
6510:
6511: =item *
6512:
6513: coursedescription($courseid) : returns a hash of information about the
6514: specified course id, including all environment settings for the
6515: course, the description of the course will be in the hash under the
6516: key 'description'
6517:
6518: =item *
6519:
6520: resdata($name,$domain,$type,@which) : request for current parameter
6521: setting for a specific $type, where $type is either 'course' or 'user',
6522: @what should be a list of parameters to ask about. This routine caches
6523: answers for 5 minutes.
6524:
6525: =back
6526:
6527: =head2 Course Modification
6528:
6529: =over 4
6530:
6531: =item *
6532:
6533: writecoursepref($courseid,%prefs) : write preferences (environment
6534: database) for a course
6535:
6536: =item *
6537:
6538: createcourse($udom,$description,$url) : make/modify course
6539:
6540: =back
6541:
6542: =head2 Resource Subroutines
6543:
6544: =over 4
6545:
6546: =item *
6547:
6548: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
6549:
6550: =item *
6551:
6552: repcopy($filename) : subscribes to the requested file, and attempts to
6553: replicate from the owning library server, Might return
6554: 'unavailable', 'not_found', 'forbidden', 'ok', or
6555: 'bad_request', also attempts to grab the metadata for the
6556: resource. Expects the local filesystem pathname
6557: (/home/httpd/html/res/....)
6558:
6559: =back
6560:
6561: =head2 Resource Information
6562:
6563: =over 4
6564:
6565: =item *
6566:
6567: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
6568: a vairety of different possible values, $varname should be a request
6569: string, and the other parameters can be used to specify who and what
6570: one is asking about.
6571:
6572: Possible values for $varname are environment.lastname (or other item
6573: from the envirnment hash), user.name (or someother aspect about the
6574: user), resource.0.maxtries (or some other part and parameter of a
6575: resource)
6576:
6577: =item *
6578:
6579: directcondval($number) : get current value of a condition; reads from a state
6580: string
6581:
6582: =item *
6583:
6584: condval($condidx) : value of condition index based on state
6585:
6586: =item *
6587:
6588: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
6589: resource's metadata, $what should be either a specific key, or either
6590: 'keys' (to get a list of possible keys) or 'packages' to get a list of
6591: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
6592:
6593: this function automatically caches all requests
6594:
6595: =item *
6596:
6597: metadata_query($query,$custom,$customshow) : make a metadata query against the
6598: network of library servers; returns file handle of where SQL and regex results
6599: will be stored for query
6600:
6601: =item *
6602:
6603: symbread($filename) : return symbolic list entry (filename argument optional);
6604: returns the data handle
6605:
6606: =item *
6607:
6608: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
6609: a possible symb for the URL in $thisfn, and if is an encryypted
6610: resource that the user accessed using /enc/ returns a 1 on success, 0
6611: on failure, user must be in a course, as it assumes the existance of
6612: the course initial hash, and uses $env('request.course.id'}
6613:
6614:
6615: =item *
6616:
6617: symbclean($symb) : removes versions numbers from a symb, returns the
6618: cleaned symb
6619:
6620: =item *
6621:
6622: is_on_map($uri) : checks if the $uri is somewhere on the current
6623: course map, user must be in a course for it to work.
6624:
6625: =item *
6626:
6627: numval($salt) : return random seed value (addend for rndseed)
6628:
6629: =item *
6630:
6631: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
6632: a random seed, all arguments are optional, if they aren't sent it uses the
6633: environment to derive them. Note: if symb isn't sent and it can't get one
6634: from &symbread it will use the current time as its return value
6635:
6636: =item *
6637:
6638: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
6639: unfakeable, receipt
6640:
6641: =item *
6642:
6643: receipt() : API to ireceipt working off of env values; given out to users
6644:
6645: =item *
6646:
6647: countacc($url) : count the number of accesses to a given URL
6648:
6649: =item *
6650:
6651: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
6652:
6653: =item *
6654:
6655: checkin($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 $tcrsid)
6656:
6657: =item *
6658:
6659: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
6660:
6661: =item *
6662:
6663: devalidate($symb) : devalidate temporary spreadsheet calculations,
6664: forcing spreadsheet to reevaluate the resource scores next time.
6665:
6666: =back
6667:
6668: =head2 Storing/Retreiving Data
6669:
6670: =over 4
6671:
6672: =item *
6673:
6674: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
6675: for this url; hashref needs to be given and should be a \%hashname; the
6676: remaining args aren't required and if they aren't passed or are '' they will
6677: be derived from the env
6678:
6679: =item *
6680:
6681: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
6682: uses critical subroutine
6683:
6684: =item *
6685:
6686: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
6687: all args are optional
6688:
6689: =item *
6690:
6691: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
6692: works very similar to store/cstore, but all data is stored in a
6693: temporary location and can be reset using tmpreset, $storehash should
6694: be a hash reference, returns nothing on success
6695:
6696: =item *
6697:
6698: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
6699: similar to restore, but all data is stored in a temporary location and
6700: can be reset using tmpreset. Returns a hash of values on success,
6701: error string otherwise.
6702:
6703: =item *
6704:
6705: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
6706: deltes all keys for $symb form the temporary storage hash.
6707:
6708: =item *
6709:
6710: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6711: reference filled in from namesp ($udom and $uname are optional)
6712:
6713: =item *
6714:
6715: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
6716: namesp ($udom and $uname are optional)
6717:
6718: =item *
6719:
6720: dump($namespace,$udom,$uname,$regexp) :
6721: dumps the complete (or key matching regexp) namespace into a hash
6722: ($udom, $uname and $regexp are optional)
6723:
6724: =item *
6725:
6726: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
6727: $store can be a scalar, an array reference, or if the amount to be
6728: incremented is > 1, a hash reference.
6729:
6730: ($udom and $uname are optional)
6731:
6732: =item *
6733:
6734: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
6735: ($udom and $uname are optional)
6736:
6737: =item *
6738:
6739: putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
6740: keys used in storehash include version information (e.g., 1:$symb:message etc.) as
6741: used in records written by &store and retrieved by &restore. This function
6742: was created for use in editing discussion posts, without incrementing the
6743: version number included in the key for a particular post. The colon
6744: separated list of attribute names (e.g., the value associated with the key
6745: 1:keys:$symb) is also generated and passed in the ampersand separated
6746: items sent to lonnet::reply().
6747:
6748: =item *
6749:
6750: cput($namespace,$storehash,$udom,$uname) : critical put
6751: ($udom and $uname are optional)
6752:
6753: =item *
6754:
6755: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6756: reference filled in from namesp (encrypts the return communication)
6757: ($udom and $uname are optional)
6758:
6759: =item *
6760:
6761: log($udom,$name,$home,$message) : write to permanent log for user; use
6762: critical subroutine
6763:
6764: =back
6765:
6766: =head2 Network Status Functions
6767:
6768: =over 4
6769:
6770: =item *
6771:
6772: dirlist($uri) : return directory list based on URI
6773:
6774: =item *
6775:
6776: spareserver() : find server with least workload from spare.tab
6777:
6778: =back
6779:
6780: =head2 Apache Request
6781:
6782: =over 4
6783:
6784: =item *
6785:
6786: ssi($url,%hash) : server side include, does a complete request cycle on url to
6787: localhost, posts hash
6788:
6789: =back
6790:
6791: =head2 Data to String to Data
6792:
6793: =over 4
6794:
6795: =item *
6796:
6797: hash2str(%hash) : convert a hash into a string complete with escaping and '='
6798: and '&' separators, supports elements that are arrayrefs and hashrefs
6799:
6800: =item *
6801:
6802: hashref2str($hashref) : convert a hashref into a string complete with
6803: escaping and '=' and '&' separators, supports elements that are
6804: arrayrefs and hashrefs
6805:
6806: =item *
6807:
6808: arrayref2str($arrayref) : convert an arrayref into a string complete
6809: with escaping and '&' separators, supports elements that are arrayrefs
6810: and hashrefs
6811:
6812: =item *
6813:
6814: str2hash($string) : convert string to hash using unescaping and
6815: splitting on '=' and '&', supports elements that are arrayrefs and
6816: hashrefs
6817:
6818: =item *
6819:
6820: str2array($string) : convert string to hash using unescaping and
6821: splitting on '&', supports elements that are arrayrefs and hashrefs
6822:
6823: =back
6824:
6825: =head2 Logging Routines
6826:
6827: =over 4
6828:
6829: These routines allow one to make log messages in the lonnet.log and
6830: lonnet.perm logfiles.
6831:
6832: =item *
6833:
6834: logtouch() : make sure the logfile, lonnet.log, exists
6835:
6836: =item *
6837:
6838: logthis() : append message to the normal lonnet.log file, it gets
6839: preiodically rolled over and deleted.
6840:
6841: =item *
6842:
6843: logperm() : append a permanent message to lonnet.perm.log, this log
6844: file never gets deleted by any automated portion of the system, only
6845: messages of critical importance should go in here.
6846:
6847: =back
6848:
6849: =head2 General File Helper Routines
6850:
6851: =over 4
6852:
6853: =item *
6854:
6855: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
6856: (a) files in /uploaded
6857: (i) If a local copy of the file exists -
6858: compares modification date of local copy with last-modified date for
6859: definitive version stored on home server for course. If local copy is
6860: stale, requests a new version from the home server and stores it.
6861: If the original has been removed from the home server, then local copy
6862: is unlinked.
6863: (ii) If local copy does not exist -
6864: requests the file from the home server and stores it.
6865:
6866: If $caller is 'uploadrep':
6867: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
6868: for request for files originally uploaded via DOCS.
6869: - returns 'ok' if fresh local copy now available, -1 otherwise.
6870:
6871: Otherwise:
6872: This indicates a call from the content generation phase of the request.
6873: - returns the entire contents of the file or -1.
6874:
6875: (b) files in /res
6876: - returns the entire contents of a file or -1;
6877: it properly subscribes to and replicates the file if neccessary.
6878:
6879: =item *
6880:
6881: filelocation($dir,$file) : returns file system location of a file
6882: based on URI; meant to be "fairly clean" absolute reference, $dir is a
6883: directory that relative $file lookups are to looked in ($dir of /a/dir
6884: and a file of ../bob will become /a/bob)
6885:
6886: =item *
6887:
6888: hreflocation($dir,$file) : returns file system location or a URL; same as
6889: filelocation except for hrefs
6890:
6891: =item *
6892:
6893: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
6894:
6895: =back
6896:
6897: =head2 Usererfile file routines (/uploaded*)
6898:
6899: =over 4
6900:
6901: =item *
6902:
6903: userfileupload(): main rotine for putting a file in a user or course's
6904: filespace, arguments are,
6905:
6906: formname - required - this is the name of the element in $env where the
6907: filename, and the contents of the file to create/modifed exist
6908: the filename is in $env{'form.'.$formname.'.filename'} and the
6909: contents of the file is located in $env{'form.'.$formname}
6910: coursedoc - if true, store the file in the course of the active role
6911: of the current user
6912: subdir - required - subdirectory to put the file in under ../userfiles/
6913: if undefined, it will be placed in "unknown"
6914:
6915: (This routine calls clean_filename() to remove any dangerous
6916: characters from the filename, and then calls finuserfileupload() to
6917: complete the transaction)
6918:
6919: returns either the url of the uploaded file (/uploaded/....) if successful
6920: and /adm/notfound.html if unsuccessful
6921:
6922: =item *
6923:
6924: clean_filename(): routine for cleaing a filename up for storage in
6925: userfile space, argument is:
6926:
6927: filename - proposed filename
6928:
6929: returns: the new clean filename
6930:
6931: =item *
6932:
6933: finishuserfileupload(): routine that creaes and sends the file to
6934: userspace, probably shouldn't be called directly
6935:
6936: docuname: username or courseid of destination for the file
6937: docudom: domain of user/course of destination for the file
6938: formname: same as for userfileupload()
6939: fname: filename (inculding subdirectories) for the file
6940:
6941: returns either the url of the uploaded file (/uploaded/....) if successful
6942: and /adm/notfound.html if unsuccessful
6943:
6944: =item *
6945:
6946: renameuserfile(): renames an existing userfile to a new name
6947:
6948: Args:
6949: docuname: username or courseid of destination for the file
6950: docudom: domain of user/course of destination for the file
6951: old: current file name (including any subdirs under userfiles)
6952: new: desired file name (including any subdirs under userfiles)
6953:
6954: =item *
6955:
6956: mkdiruserfile(): creates a directory is a userfiles dir
6957:
6958: Args:
6959: docuname: username or courseid of destination for the file
6960: docudom: domain of user/course of destination for the file
6961: dir: dir to create (including any subdirs under userfiles)
6962:
6963: =item *
6964:
6965: removeuserfile(): removes a file that exists in userfiles
6966:
6967: Args:
6968: docuname: username or courseid of destination for the file
6969: docudom: domain of user/course of destination for the file
6970: fname: filname to delete (including any subdirs under userfiles)
6971:
6972: =item *
6973:
6974: removeuploadedurl(): convience function for removeuserfile()
6975:
6976: Args:
6977: url: a full /uploaded/... url to delete
6978:
6979: =back
6980:
6981: =head2 HTTP Helper Routines
6982:
6983: =over 4
6984:
6985: =item *
6986:
6987: escape() : unpack non-word characters into CGI-compatible hex codes
6988:
6989: =item *
6990:
6991: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
6992:
6993: =back
6994:
6995: =head1 PRIVATE SUBROUTINES
6996:
6997: =head2 Underlying communication routines (Shouldn't call)
6998:
6999: =over 4
7000:
7001: =item *
7002:
7003: subreply() : tries to pass a message to lonc, returns con_lost if incapable
7004:
7005: =item *
7006:
7007: reply() : uses subreply to send a message to remote machine, logs all failures
7008:
7009: =item *
7010:
7011: critical() : passes a critical message to another server; if cannot
7012: get through then place message in connection buffer directory and
7013: returns con_delayed, if incapable of saving message, returns
7014: con_failed
7015:
7016: =item *
7017:
7018: reconlonc() : tries to reconnect lonc client processes.
7019:
7020: =back
7021:
7022: =head2 Resource Access Logging
7023:
7024: =over 4
7025:
7026: =item *
7027:
7028: flushcourselogs() : flush (save) buffer logs and access logs
7029:
7030: =item *
7031:
7032: courselog($what) : save message for course in hash
7033:
7034: =item *
7035:
7036: courseacclog($what) : save message for course using &courselog(). Perform
7037: special processing for specific resource types (problems, exams, quizzes, etc).
7038:
7039: =item *
7040:
7041: goodbye() : flush course logs and log shutting down; it is called in srm.conf
7042: as a PerlChildExitHandler
7043:
7044: =back
7045:
7046: =head2 Other
7047:
7048: =over 4
7049:
7050: =item *
7051:
7052: symblist($mapname,%newhash) : update symbolic storage links
7053:
7054: =back
7055:
7056: =cut
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