1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.622 2005/04/12 00:20:00 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 $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 Fcntl qw(:flock);
51: use Apache::lonlocal;
52: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
53: use Time::HiRes qw( gettimeofday tv_interval );
54: use Cache::Memcached;
55: my $readit;
56: my $max_connection_retries = 10; # Or some such value.
57:
58: require Exporter;
59:
60: our @ISA = qw (Exporter);
61: our @EXPORT = qw(%env);
62:
63: =pod
64:
65: =head1 Package Variables
66:
67: These are largely undocumented, so if you decipher one please note it here.
68:
69: =over 4
70:
71: =item $processmarker
72:
73: Contains the time this process was started and this servers host id.
74:
75: =item $dumpcount
76:
77: Counts the number of times a message log flush has been attempted (regardless
78: of success) by this process. Used as part of the filename when messages are
79: delayed.
80:
81: =back
82:
83: =cut
84:
85:
86: # --------------------------------------------------------------------- Logging
87:
88: sub logtouch {
89: my $execdir=$perlvar{'lonDaemons'};
90: unless (-e "$execdir/logs/lonnet.log") {
91: open(my $fh,">>$execdir/logs/lonnet.log");
92: close $fh;
93: }
94: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
95: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
96: }
97:
98: sub logthis {
99: my $message=shift;
100: my $execdir=$perlvar{'lonDaemons'};
101: my $now=time;
102: my $local=localtime($now);
103: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
104: print $fh "$local ($$): $message\n";
105: close($fh);
106: }
107: return 1;
108: }
109:
110: sub logperm {
111: my $message=shift;
112: my $execdir=$perlvar{'lonDaemons'};
113: my $now=time;
114: my $local=localtime($now);
115: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
116: print $fh "$now:$message:$local\n";
117: close($fh);
118: }
119: return 1;
120: }
121:
122: # -------------------------------------------------- Non-critical communication
123: sub subreply {
124: my ($cmd,$server)=@_;
125: my $peerfile="$perlvar{'lonSockDir'}/$server";
126: #
127: # With loncnew process trimming, there's a timing hole between lonc server
128: # process exit and the master server picking up the listen on the AF_UNIX
129: # socket. In that time interval, a lock file will exist:
130:
131: my $lockfile=$peerfile.".lock";
132: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
133: sleep(1);
134: }
135: # At this point, either a loncnew parent is listening or an old lonc
136: # or loncnew child is listening so we can connect or everything's dead.
137: #
138: # We'll give the connection a few tries before abandoning it. If
139: # connection is not possible, we'll con_lost back to the client.
140: #
141: my $client;
142: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
143: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
144: Type => SOCK_STREAM,
145: Timeout => 10);
146: if($client) {
147: last; # Connected!
148: }
149: sleep(1); # Try again later if failed connection.
150: }
151: my $answer;
152: if ($client) {
153: print $client "$cmd\n";
154: $answer=<$client>;
155: if (!$answer) { $answer="con_lost"; }
156: chomp($answer);
157: } else {
158: $answer = 'con_lost'; # Failed connection.
159: }
160: return $answer;
161: }
162:
163: sub reply {
164: my ($cmd,$server)=@_;
165: unless (defined($hostname{$server})) { return 'no_such_host'; }
166: my $answer=subreply($cmd,$server);
167: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
168: &logthis("<font color=blue>WARNING:".
169: " $cmd to $server returned $answer</font>");
170: }
171: return $answer;
172: }
173:
174: # ----------------------------------------------------------- Send USR1 to lonc
175:
176: sub reconlonc {
177: my $peerfile=shift;
178: &logthis("Trying to reconnect for $peerfile");
179: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
180: if (open(my $fh,"<$loncfile")) {
181: my $loncpid=<$fh>;
182: chomp($loncpid);
183: if (kill 0 => $loncpid) {
184: &logthis("lonc at pid $loncpid responding, sending USR1");
185: kill USR1 => $loncpid;
186: sleep 1;
187: if (-e "$peerfile") { return; }
188: &logthis("$peerfile still not there, give it another try");
189: sleep 5;
190: if (-e "$peerfile") { return; }
191: &logthis(
192: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
193: } else {
194: &logthis(
195: "<font color=blue>WARNING:".
196: " lonc at pid $loncpid not responding, giving up</font>");
197: }
198: } else {
199: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
200: }
201: }
202:
203: # ------------------------------------------------------ Critical communication
204:
205: sub critical {
206: my ($cmd,$server)=@_;
207: unless ($hostname{$server}) {
208: &logthis("<font color=blue>WARNING:".
209: " Critical message to unknown server ($server)</font>");
210: return 'no_such_host';
211: }
212: my $answer=reply($cmd,$server);
213: if ($answer eq 'con_lost') {
214: &reconlonc("$perlvar{'lonSockDir'}/$server");
215: my $answer=reply($cmd,$server);
216: if ($answer eq 'con_lost') {
217: my $now=time;
218: my $middlename=$cmd;
219: $middlename=substr($middlename,0,16);
220: $middlename=~s/\W//g;
221: my $dfilename=
222: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
223: $dumpcount++;
224: {
225: my $dfh;
226: if (open($dfh,">$dfilename")) {
227: print $dfh "$cmd\n";
228: close($dfh);
229: }
230: }
231: sleep 2;
232: my $wcmd='';
233: {
234: my $dfh;
235: if (open($dfh,"<$dfilename")) {
236: $wcmd=<$dfh>;
237: close($dfh);
238: }
239: }
240: chomp($wcmd);
241: if ($wcmd eq $cmd) {
242: &logthis("<font color=blue>WARNING: ".
243: "Connection buffer $dfilename: $cmd</font>");
244: &logperm("D:$server:$cmd");
245: return 'con_delayed';
246: } else {
247: &logthis("<font color=red>CRITICAL:"
248: ." Critical connection failed: $server $cmd</font>");
249: &logperm("F:$server:$cmd");
250: return 'con_failed';
251: }
252: }
253: }
254: return $answer;
255: }
256:
257: # ------------------------------------------- Transfer profile into environment
258:
259: sub transfer_profile_to_env {
260: my ($lonidsdir,$handle)=@_;
261: my @profile;
262: {
263: open(my $idf,"$lonidsdir/$handle.id");
264: flock($idf,LOCK_SH);
265: @profile=<$idf>;
266: close($idf);
267: }
268: my $envi;
269: my %Remove;
270: for ($envi=0;$envi<=$#profile;$envi++) {
271: chomp($profile[$envi]);
272: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
273: $env{$envname} = $envvalue;
274: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
275: if ($time < time-300) {
276: $Remove{$key}++;
277: }
278: }
279: }
280: $env{'user.environment'} = "$lonidsdir/$handle.id";
281: foreach my $expired_key (keys(%Remove)) {
282: &delenv($expired_key);
283: }
284: }
285:
286: # ---------------------------------------------------------- Append Environment
287:
288: sub appenv {
289: my %newenv=@_;
290: foreach (keys %newenv) {
291: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
292: &logthis("<font color=blue>WARNING: ".
293: "Attempt to modify environment ".$_." to ".$newenv{$_}
294: .'</font>');
295: delete($newenv{$_});
296: } else {
297: $env{$_}=$newenv{$_};
298: }
299: }
300:
301: my $lockfh;
302: unless (open($lockfh,"$env{'user.environment'}")) {
303: return 'error: '.$!;
304: }
305: unless (flock($lockfh,LOCK_EX)) {
306: &logthis("<font color=blue>WARNING: ".
307: 'Could not obtain exclusive lock in appenv: '.$!);
308: close($lockfh);
309: return 'error: '.$!;
310: }
311:
312: my @oldenv;
313: {
314: my $fh;
315: unless (open($fh,"$env{'user.environment'}")) {
316: return 'error: '.$!;
317: }
318: @oldenv=<$fh>;
319: close($fh);
320: }
321: for (my $i=0; $i<=$#oldenv; $i++) {
322: chomp($oldenv[$i]);
323: if ($oldenv[$i] ne '') {
324: my ($name,$value)=split(/=/,$oldenv[$i]);
325: unless (defined($newenv{$name})) {
326: $newenv{$name}=$value;
327: }
328: }
329: }
330: {
331: my $fh;
332: unless (open($fh,">$env{'user.environment'}")) {
333: return 'error';
334: }
335: my $newname;
336: foreach $newname (keys %newenv) {
337: print $fh "$newname=$newenv{$newname}\n";
338: }
339: close($fh);
340: }
341:
342: close($lockfh);
343: return 'ok';
344: }
345: # ----------------------------------------------------- Delete from Environment
346:
347: sub delenv {
348: my $delthis=shift;
349: my %newenv=();
350: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
351: &logthis("<font color=blue>WARNING: ".
352: "Attempt to delete from environment ".$delthis);
353: return 'error';
354: }
355: my @oldenv;
356: {
357: my $fh;
358: unless (open($fh,"$env{'user.environment'}")) {
359: return 'error';
360: }
361: unless (flock($fh,LOCK_SH)) {
362: &logthis("<font color=blue>WARNING: ".
363: 'Could not obtain shared lock in delenv: '.$!);
364: close($fh);
365: return 'error: '.$!;
366: }
367: @oldenv=<$fh>;
368: close($fh);
369: }
370: {
371: my $fh;
372: unless (open($fh,">$env{'user.environment'}")) {
373: return 'error';
374: }
375: unless (flock($fh,LOCK_EX)) {
376: &logthis("<font color=blue>WARNING: ".
377: 'Could not obtain exclusive lock in delenv: '.$!);
378: close($fh);
379: return 'error: '.$!;
380: }
381: foreach (@oldenv) {
382: if ($_=~/^$delthis/) {
383: my ($key,undef) = split('=',$_);
384: delete($env{$key});
385: } else {
386: print $fh $_;
387: }
388: }
389: close($fh);
390: }
391: return 'ok';
392: }
393:
394: # ------------------------------------------ Find out current server userload
395: # there is a copy in lond
396: sub userload {
397: my $numusers=0;
398: {
399: opendir(LONIDS,$perlvar{'lonIDsDir'});
400: my $filename;
401: my $curtime=time;
402: while ($filename=readdir(LONIDS)) {
403: if ($filename eq '.' || $filename eq '..') {next;}
404: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
405: if ($curtime-$mtime < 1800) { $numusers++; }
406: }
407: closedir(LONIDS);
408: }
409: my $userloadpercent=0;
410: my $maxuserload=$perlvar{'lonUserLoadLim'};
411: if ($maxuserload) {
412: $userloadpercent=100*$numusers/$maxuserload;
413: }
414: $userloadpercent=sprintf("%.2f",$userloadpercent);
415: return $userloadpercent;
416: }
417:
418: # ------------------------------------------ Fight off request when overloaded
419:
420: sub overloaderror {
421: my ($r,$checkserver)=@_;
422: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
423: my $loadavg;
424: if ($checkserver eq $perlvar{'lonHostID'}) {
425: open(my $loadfile,'/proc/loadavg');
426: $loadavg=<$loadfile>;
427: $loadavg =~ s/\s.*//g;
428: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
429: close($loadfile);
430: } else {
431: $loadavg=&reply('load',$checkserver);
432: }
433: my $overload=$loadavg-100;
434: if ($overload>0) {
435: $r->err_headers_out->{'Retry-After'}=$overload;
436: $r->log_error('Overload of '.$overload.' on '.$checkserver);
437: return 413;
438: }
439: return '';
440: }
441:
442: # ------------------------------ Find server with least workload from spare.tab
443:
444: sub spareserver {
445: my ($loadpercent,$userloadpercent) = @_;
446: my $tryserver;
447: my $spareserver='';
448: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
449: my $lowestserver=$loadpercent > $userloadpercent?
450: $loadpercent : $userloadpercent;
451: foreach $tryserver (keys %spareid) {
452: my $loadans=reply('load',$tryserver);
453: my $userloadans=reply('userload',$tryserver);
454: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
455: next; #didn't get a number from the server
456: }
457: my $answer;
458: if ($loadans =~ /\d/) {
459: if ($userloadans =~ /\d/) {
460: #both are numbers, pick the bigger one
461: $answer=$loadans > $userloadans?
462: $loadans : $userloadans;
463: } else {
464: $answer = $loadans;
465: }
466: } else {
467: $answer = $userloadans;
468: }
469: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
470: $spareserver="http://$hostname{$tryserver}";
471: $lowestserver=$answer;
472: }
473: }
474: return $spareserver;
475: }
476:
477: # --------------------------------------------- Try to change a user's password
478:
479: sub changepass {
480: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
481: $currentpass = &escape($currentpass);
482: $newpass = &escape($newpass);
483: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
484: $server);
485: if (! $answer) {
486: &logthis("No reply on password change request to $server ".
487: "by $uname in domain $udom.");
488: } elsif ($answer =~ "^ok") {
489: &logthis("$uname in $udom successfully changed their password ".
490: "on $server.");
491: } elsif ($answer =~ "^pwchange_failure") {
492: &logthis("$uname in $udom was unable to change their password ".
493: "on $server. The action was blocked by either lcpasswd ".
494: "or pwchange");
495: } elsif ($answer =~ "^non_authorized") {
496: &logthis("$uname in $udom did not get their password correct when ".
497: "attempting to change it on $server.");
498: } elsif ($answer =~ "^auth_mode_error") {
499: &logthis("$uname in $udom attempted to change their password despite ".
500: "not being locally or internally authenticated on $server.");
501: } elsif ($answer =~ "^unknown_user") {
502: &logthis("$uname in $udom attempted to change their password ".
503: "on $server but were unable to because $server is not ".
504: "their home server.");
505: } elsif ($answer =~ "^refused") {
506: &logthis("$server refused to change $uname in $udom password because ".
507: "it was sent an unencrypted request to change the password.");
508: }
509: return $answer;
510: }
511:
512: # ----------------------- Try to determine user's current authentication scheme
513:
514: sub queryauthenticate {
515: my ($uname,$udom)=@_;
516: my $uhome=&homeserver($uname,$udom);
517: if (!$uhome) {
518: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
519: return 'no_host';
520: }
521: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
522: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
523: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
524: }
525: return $answer;
526: }
527:
528: # --------- Try to authenticate user from domain's lib servers (first this one)
529:
530: sub authenticate {
531: my ($uname,$upass,$udom)=@_;
532: $upass=escape($upass);
533: $uname=~s/\W//g;
534: my $uhome=&homeserver($uname,$udom);
535: if (!$uhome) {
536: &logthis("User $uname at $udom is unknown in authenticate");
537: return 'no_host';
538: }
539: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
540: if ($answer eq 'authorized') {
541: &logthis("User $uname at $udom authorized by $uhome");
542: return $uhome;
543: }
544: if ($answer eq 'non_authorized') {
545: &logthis("User $uname at $udom rejected by $uhome");
546: return 'no_host';
547: }
548: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
549: return 'no_host';
550: }
551:
552: # ---------------------- Find the homebase for a user from domain's lib servers
553:
554: my %homecache;
555: sub homeserver {
556: my ($uname,$udom,$ignoreBadCache)=@_;
557: my $index="$uname:$udom";
558:
559: if (exists($homecache{$index})) { return $homecache{$index}; }
560: my $tryserver;
561: foreach $tryserver (keys %libserv) {
562: next if ($ignoreBadCache ne 'true' &&
563: exists($badServerCache{$tryserver}));
564: if ($hostdom{$tryserver} eq $udom) {
565: my $answer=reply("home:$udom:$uname",$tryserver);
566: if ($answer eq 'found') {
567: return $homecache{$index}=$tryserver;
568: } elsif ($answer eq 'no_host') {
569: $badServerCache{$tryserver}=1;
570: }
571: }
572: }
573: return 'no_host';
574: }
575:
576: # ------------------------------------- Find the usernames behind a list of IDs
577:
578: sub idget {
579: my ($udom,@ids)=@_;
580: my %returnhash=();
581:
582: my $tryserver;
583: foreach $tryserver (keys %libserv) {
584: if ($hostdom{$tryserver} eq $udom) {
585: my $idlist=join('&',@ids);
586: $idlist=~tr/A-Z/a-z/;
587: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
588: my @answer=();
589: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
590: @answer=split(/\&/,$reply);
591: } ;
592: my $i;
593: for ($i=0;$i<=$#ids;$i++) {
594: if ($answer[$i]) {
595: $returnhash{$ids[$i]}=$answer[$i];
596: }
597: }
598: }
599: }
600: return %returnhash;
601: }
602:
603: # ------------------------------------- Find the IDs behind a list of usernames
604:
605: sub idrget {
606: my ($udom,@unames)=@_;
607: my %returnhash=();
608: foreach (@unames) {
609: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
610: }
611: return %returnhash;
612: }
613:
614: # ------------------------------- Store away a list of names and associated IDs
615:
616: sub idput {
617: my ($udom,%ids)=@_;
618: my %servers=();
619: foreach (keys %ids) {
620: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
621: my $uhom=&homeserver($_,$udom);
622: if ($uhom ne 'no_host') {
623: my $id=&escape($ids{$_});
624: $id=~tr/A-Z/a-z/;
625: my $unam=&escape($_);
626: if ($servers{$uhom}) {
627: $servers{$uhom}.='&'.$id.'='.$unam;
628: } else {
629: $servers{$uhom}=$id.'='.$unam;
630: }
631: }
632: }
633: foreach (keys %servers) {
634: &critical('idput:'.$udom.':'.$servers{$_},$_);
635: }
636: }
637:
638: # --------------------------------------------------- Assign a key to a student
639:
640: sub assign_access_key {
641: #
642: # a valid key looks like uname:udom#comments
643: # comments are being appended
644: #
645: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
646: $kdom=
647: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
648: $knum=
649: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
650: $cdom=
651: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
652: $cnum=
653: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
654: $udom=$env{'user.name'} unless (defined($udom));
655: $uname=$env{'user.domain'} unless (defined($uname));
656: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
657: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
658: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
659: # assigned to this person
660: # - this should not happen,
661: # unless something went wrong
662: # the first time around
663: # ready to assign
664: $logentry=$1.'; '.$logentry;
665: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
666: $kdom,$knum) eq 'ok') {
667: # key now belongs to user
668: my $envkey='key.'.$cdom.'_'.$cnum;
669: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
670: &appenv('environment.'.$envkey => $ckey);
671: return 'ok';
672: } else {
673: return
674: 'error: Count not permanently assign key, will need to be re-entered later.';
675: }
676: } else {
677: return 'error: Could not assign key, try again later.';
678: }
679: } elsif (!$existing{$ckey}) {
680: # the key does not exist
681: return 'error: The key does not exist';
682: } else {
683: # the key is somebody else's
684: return 'error: The key is already in use';
685: }
686: }
687:
688: # ------------------------------------------ put an additional comment on a key
689:
690: sub comment_access_key {
691: #
692: # a valid key looks like uname:udom#comments
693: # comments are being appended
694: #
695: my ($ckey,$cdom,$cnum,$logentry)=@_;
696: $cdom=
697: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
698: $cnum=
699: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
700: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
701: if ($existing{$ckey}) {
702: $existing{$ckey}.='; '.$logentry;
703: # ready to assign
704: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
705: $cdom,$cnum) eq 'ok') {
706: return 'ok';
707: } else {
708: return 'error: Count not store comment.';
709: }
710: } else {
711: # the key does not exist
712: return 'error: The key does not exist';
713: }
714: }
715:
716: # ------------------------------------------------------ Generate a set of keys
717:
718: sub generate_access_keys {
719: my ($number,$cdom,$cnum,$logentry)=@_;
720: $cdom=
721: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
722: $cnum=
723: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
724: unless (&allowed('mky',$cdom)) { return 0; }
725: unless (($cdom) && ($cnum)) { return 0; }
726: if ($number>10000) { return 0; }
727: sleep(2); # make sure don't get same seed twice
728: srand(time()^($$+($$<<15))); # from "Programming Perl"
729: my $total=0;
730: for (my $i=1;$i<=$number;$i++) {
731: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
732: sprintf("%lx",int(100000*rand)).'-'.
733: sprintf("%lx",int(100000*rand));
734: $newkey=~s/1/g/g; # folks mix up 1 and l
735: $newkey=~s/0/h/g; # and also 0 and O
736: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
737: if ($existing{$newkey}) {
738: $i--;
739: } else {
740: if (&put('accesskeys',
741: { $newkey => '# generated '.localtime().
742: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
743: '; '.$logentry },
744: $cdom,$cnum) eq 'ok') {
745: $total++;
746: }
747: }
748: }
749: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
750: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
751: return $total;
752: }
753:
754: # ------------------------------------------------------- Validate an accesskey
755:
756: sub validate_access_key {
757: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
758: $cdom=
759: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
760: $cnum=
761: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
762: $udom=$env{'user.domain'} unless (defined($udom));
763: $uname=$env{'user.name'} unless (defined($uname));
764: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
765: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
766: }
767:
768: # ------------------------------------- Find the section of student in a course
769:
770: sub getsection {
771: my ($udom,$unam,$courseid)=@_;
772: my $cachetime=1800;
773: $courseid=~s/\_/\//g;
774: $courseid=~s/^(\w)/\/$1/;
775:
776: my $hashid="$udom:$unam:$courseid";
777: my ($result,$cached)=&is_cached_new('getsection',$hashid);
778: if (defined($cached)) { return $result; }
779:
780: my %Pending;
781: my %Expired;
782: #
783: # Each role can either have not started yet (pending), be active,
784: # or have expired.
785: #
786: # If there is an active role, we are done.
787: #
788: # If there is more than one role which has not started yet,
789: # choose the one which will start sooner
790: # If there is one role which has not started yet, return it.
791: #
792: # If there is more than one expired role, choose the one which ended last.
793: # If there is a role which has expired, return it.
794: #
795: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
796: &homeserver($unam,$udom)))) {
797: my ($key,$value)=split(/\=/,$_);
798: $key=&unescape($key);
799: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
800: my $section=$1;
801: if ($key eq $courseid.'_st') { $section=''; }
802: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
803: my $now=time;
804: if (defined($end) && $end && ($now > $end)) {
805: $Expired{$end}=$section;
806: next;
807: }
808: if (defined($start) && $start && ($now < $start)) {
809: $Pending{$start}=$section;
810: next;
811: }
812: return &do_cache_new('getsection',$hashid,$section,$cachetime);
813: }
814: #
815: # Presumedly there will be few matching roles from the above
816: # loop and the sorting time will be negligible.
817: if (scalar(keys(%Pending))) {
818: my ($time) = sort {$a <=> $b} keys(%Pending);
819: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
820: }
821: if (scalar(keys(%Expired))) {
822: my @sorted = sort {$a <=> $b} keys(%Expired);
823: my $time = pop(@sorted);
824: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
825: }
826: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
827: }
828:
829: sub save_cache {
830: &purge_remembered();
831: undef(%env);
832: }
833:
834: my $to_remember=-1;
835: my %remembered;
836: my %accessed;
837: my $kicks=0;
838: my $hits=0;
839: sub devalidate_cache_new {
840: my ($name,$id,$debug) = @_;
841: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
842: $id=&escape($name.':'.$id);
843: $memcache->delete($id);
844: delete($remembered{$id});
845: delete($accessed{$id});
846: }
847:
848: sub is_cached_new {
849: my ($name,$id,$debug) = @_;
850: $id=&escape($name.':'.$id);
851: if (exists($remembered{$id})) {
852: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
853: $accessed{$id}=[&gettimeofday()];
854: $hits++;
855: return ($remembered{$id},1);
856: }
857: my $value = $memcache->get($id);
858: if (!(defined($value))) {
859: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
860: return (undef,undef);
861: }
862: if ($value eq '__undef__') {
863: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
864: $value=undef;
865: }
866: &make_room($id,$value,$debug);
867: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
868: return ($value,1);
869: }
870:
871: sub do_cache_new {
872: my ($name,$id,$value,$time,$debug) = @_;
873: $id=&escape($name.':'.$id);
874: my $setvalue=$value;
875: if (!defined($setvalue)) {
876: $setvalue='__undef__';
877: }
878: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
879: $memcache->set($id,$setvalue,$time);
880: # need to make a copy of $value
881: #&make_room($id,$value,$debug);
882: return $value;
883: }
884:
885: sub make_room {
886: my ($id,$value,$debug)=@_;
887: $remembered{$id}=$value;
888: if ($to_remember<0) { return; }
889: $accessed{$id}=[&gettimeofday()];
890: if (scalar(keys(%remembered)) <= $to_remember) { return; }
891: my $to_kick;
892: my $max_time=0;
893: foreach my $other (keys(%accessed)) {
894: if (&tv_interval($accessed{$other}) > $max_time) {
895: $to_kick=$other;
896: $max_time=&tv_interval($accessed{$other});
897: }
898: }
899: delete($remembered{$to_kick});
900: delete($accessed{$to_kick});
901: $kicks++;
902: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
903: return;
904: }
905:
906: sub purge_remembered {
907: #&logthis("Tossing ".scalar(keys(%remembered)));
908: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
909: undef(%remembered);
910: undef(%accessed);
911: }
912: # ------------------------------------- Read an entry from a user's environment
913:
914: sub userenvironment {
915: my ($udom,$unam,@what)=@_;
916: my %returnhash=();
917: my @answer=split(/\&/,
918: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
919: &homeserver($unam,$udom)));
920: my $i;
921: for ($i=0;$i<=$#what;$i++) {
922: $returnhash{$what[$i]}=&unescape($answer[$i]);
923: }
924: return %returnhash;
925: }
926:
927: # ---------------------------------------------------------- Get a studentphoto
928: sub studentphoto {
929: my ($udom,$unam,$ext) = @_;
930: my $home=&Apache::lonnet::homeserver($unam,$udom);
931: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext",$home);
932: my $url="/uploaded/$udom/$unam/internal/studentphoto.".$ext;
933: if ($ret ne 'ok') {
934: return '/adm/lonKaputt/lonlogo_broken.gif';
935: }
936: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
937: return $tokenurl;
938: }
939:
940: # -------------------------------------------------------------------- New chat
941:
942: sub chatsend {
943: my ($newentry,$anon)=@_;
944: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
945: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
946: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
947: &reply('chatsend:'.$cdom.':'.$cnum.':'.
948: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
949: &escape($newentry)),$chome);
950: }
951:
952: # ------------------------------------------ Find current version of a resource
953:
954: sub getversion {
955: my $fname=&clutter(shift);
956: unless ($fname=~/^\/res\//) { return -1; }
957: return ¤tversion(&filelocation('',$fname));
958: }
959:
960: sub currentversion {
961: my $fname=shift;
962: my ($result,$cached)=&is_cached_new('resversion',$fname);
963: if (defined($cached)) { return $result; }
964: my $author=$fname;
965: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
966: my ($udom,$uname)=split(/\//,$author);
967: my $home=homeserver($uname,$udom);
968: if ($home eq 'no_host') {
969: return -1;
970: }
971: my $answer=reply("currentversion:$fname",$home);
972: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
973: return -1;
974: }
975: return &do_cache_new('resversion',$fname,$answer,600);
976: }
977:
978: # ----------------------------- Subscribe to a resource, return URL if possible
979:
980: sub subscribe {
981: my $fname=shift;
982: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
983: $fname=~s/[\n\r]//g;
984: my $author=$fname;
985: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
986: my ($udom,$uname)=split(/\//,$author);
987: my $home=homeserver($uname,$udom);
988: if ($home eq 'no_host') {
989: return 'not_found';
990: }
991: my $answer=reply("sub:$fname",$home);
992: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
993: $answer.=' by '.$home;
994: }
995: return $answer;
996: }
997:
998: # -------------------------------------------------------------- Replicate file
999:
1000: sub repcopy {
1001: my $filename=shift;
1002: $filename=~s/\/+/\//g;
1003: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1004: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1005: if ($filename=~m|^/home/httpd/html/userfiles/| or
1006: $filename=~m -^/*(uploaded|editupload)/-) {
1007: return &repcopy_userfile($filename);
1008: }
1009: $filename=~s/[\n\r]//g;
1010: my $transname="$filename.in.transfer";
1011: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1012: my $remoteurl=subscribe($filename);
1013: if ($remoteurl =~ /^con_lost by/) {
1014: &logthis("Subscribe returned $remoteurl: $filename");
1015: return 'unavailable';
1016: } elsif ($remoteurl eq 'not_found') {
1017: #&logthis("Subscribe returned not_found: $filename");
1018: return 'not_found';
1019: } elsif ($remoteurl =~ /^rejected by/) {
1020: &logthis("Subscribe returned $remoteurl: $filename");
1021: return 'forbidden';
1022: } elsif ($remoteurl eq 'directory') {
1023: return 'ok';
1024: } else {
1025: my $author=$filename;
1026: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1027: my ($udom,$uname)=split(/\//,$author);
1028: my $home=homeserver($uname,$udom);
1029: unless ($home eq $perlvar{'lonHostID'}) {
1030: my @parts=split(/\//,$filename);
1031: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1032: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1033: &logthis("Malconfiguration for replication: $filename");
1034: return 'bad_request';
1035: }
1036: my $count;
1037: for ($count=5;$count<$#parts;$count++) {
1038: $path.="/$parts[$count]";
1039: if ((-e $path)!=1) {
1040: mkdir($path,0777);
1041: }
1042: }
1043: my $ua=new LWP::UserAgent;
1044: my $request=new HTTP::Request('GET',"$remoteurl");
1045: my $response=$ua->request($request,$transname);
1046: if ($response->is_error()) {
1047: unlink($transname);
1048: my $message=$response->status_line;
1049: &logthis("<font color=blue>WARNING:"
1050: ." LWP get: $message: $filename</font>");
1051: return 'unavailable';
1052: } else {
1053: if ($remoteurl!~/\.meta$/) {
1054: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1055: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1056: if ($mresponse->is_error()) {
1057: unlink($filename.'.meta');
1058: &logthis(
1059: "<font color=yellow>INFO: No metadata: $filename</font>");
1060: }
1061: }
1062: rename($transname,$filename);
1063: return 'ok';
1064: }
1065: }
1066: }
1067: }
1068:
1069: # ------------------------------------------------ Get server side include body
1070: sub ssi_body {
1071: my ($filelink,%form)=@_;
1072: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1073: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1074: }
1075: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1076: &ssi($filelink,%form));
1077: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs;
1078: $output=~s/^.*?\<body[^\>]*\>//si;
1079: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1080: return $output;
1081: }
1082:
1083: # --------------------------------------------------------- Server Side Include
1084:
1085: sub ssi {
1086:
1087: my ($fn,%form)=@_;
1088:
1089: my $ua=new LWP::UserAgent;
1090:
1091: my $request;
1092:
1093: if (%form) {
1094: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1095: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1096: } else {
1097: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1098: }
1099:
1100: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1101: my $response=$ua->request($request);
1102:
1103: return $response->content;
1104: }
1105:
1106: sub externalssi {
1107: my ($url)=@_;
1108: my $ua=new LWP::UserAgent;
1109: my $request=new HTTP::Request('GET',$url);
1110: my $response=$ua->request($request);
1111: return $response->content;
1112: }
1113:
1114: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1115:
1116: sub allowuploaded {
1117: my ($srcurl,$url)=@_;
1118: $url=&clutter(&declutter($url));
1119: my $dir=$url;
1120: $dir=~s/\/[^\/]+$//;
1121: my %httpref=();
1122: my $httpurl=&hreflocation('',$url);
1123: $httpref{'httpref.'.$httpurl}=$srcurl;
1124: &Apache::lonnet::appenv(%httpref);
1125: }
1126:
1127: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1128: # input: action, courseID, current domain, home server for course, intended
1129: # path to file, source of file.
1130: # output: url to file (if action was uploaddoc),
1131: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1132: #
1133: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1134: # course.
1135: #
1136: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1137: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1138: # course's home server.
1139: #
1140: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1141: # be copied from $source (current location) to
1142: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1143: # and will then be copied to
1144: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1145: # course's home server.
1146: #
1147: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1148: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1149: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1150: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1151: # in course's home server.
1152:
1153:
1154: sub process_coursefile {
1155: my ($action,$docuname,$docudom,$docuhome,$file,$source)=@_;
1156: my $fetchresult;
1157: if ($action eq 'propagate') {
1158: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file
1159: ,$docuhome);
1160: } else {
1161: my $fetchresult = '';
1162: my $fpath = '';
1163: my $fname = $file;
1164: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1165: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1166: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1167: unless ($fpath eq '') {
1168: my @parts=split('/',$fpath);
1169: foreach my $part (@parts) {
1170: $filepath.= '/'.$part;
1171: if ((-e $filepath)!=1) {
1172: mkdir($filepath,0777);
1173: }
1174: }
1175: }
1176: if ($action eq 'copy') {
1177: if ($source eq '') {
1178: $fetchresult = 'no source file';
1179: return $fetchresult;
1180: } else {
1181: my $destination = $filepath.'/'.$fname;
1182: rename($source,$destination);
1183: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1184: $docuhome);
1185: }
1186: } elsif ($action eq 'uploaddoc') {
1187: open(my $fh,'>'.$filepath.'/'.$fname);
1188: print $fh $env{'form.'.$source};
1189: close($fh);
1190: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1191: $docuhome);
1192: if ($fetchresult eq 'ok') {
1193: return '/uploaded/'.$fpath.'/'.$fname;
1194: } else {
1195: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1196: ' to host '.$docuhome.': '.$fetchresult);
1197: return '/adm/notfound.html';
1198: }
1199: }
1200: }
1201: unless ( $fetchresult eq 'ok') {
1202: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1203: ' to host '.$docuhome.': '.$fetchresult);
1204: }
1205: return $fetchresult;
1206: }
1207:
1208: sub clean_filename {
1209: my ($fname)=@_;
1210: # Replace Windows backslashes by forward slashes
1211: $fname=~s/\\/\//g;
1212: # Get rid of everything but the actual filename
1213: $fname=~s/^.*\/([^\/]+)$/$1/;
1214: # Replace spaces by underscores
1215: $fname=~s/\s+/\_/g;
1216: # Replace all other weird characters by nothing
1217: $fname=~s/[^\w\.\-]//g;
1218: # Replace all .\d. sequences with _\d. so they no longer look like version
1219: # numbers
1220: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1221: return $fname;
1222: }
1223:
1224: # --------------- Take an uploaded file and put it into the userfiles directory
1225: # input: name of form element, coursedoc=1 means this is for the course
1226: # output: url of file in userspace
1227:
1228:
1229: sub userfileupload {
1230: my ($formname,$coursedoc,$subdir)=@_;
1231: if (!defined($subdir)) { $subdir='unknown'; }
1232: my $fname=$env{'form.'.$formname.'.filename'};
1233: $fname=&clean_filename($fname);
1234: # See if there is anything left
1235: unless ($fname) { return 'error: no uploaded file'; }
1236: chop($env{'form.'.$formname});
1237: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1238: my $now = time;
1239: my $filepath = 'tmp/helprequests/'.$now;
1240: my @parts=split(/\//,$filepath);
1241: my $fullpath = $perlvar{'lonDaemons'};
1242: for (my $i=0;$i<@parts;$i++) {
1243: $fullpath .= '/'.$parts[$i];
1244: if ((-e $fullpath)!=1) {
1245: mkdir($fullpath,0777);
1246: }
1247: }
1248: open(my $fh,'>'.$fullpath.'/'.$fname);
1249: print $fh $env{'form.'.$formname};
1250: close($fh);
1251: return $fullpath.'/'.$fname;
1252: }
1253: # Create the directory if not present
1254: my $docuname='';
1255: my $docudom='';
1256: my $docuhome='';
1257: $fname="$subdir/$fname";
1258: if ($coursedoc) {
1259: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1260: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1261: $docuhome=$env{'course.'.$env{'request.course.id'}.'.home'};
1262: if ($env{'form.folder'} =~ m/^default/) {
1263: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1264: } else {
1265: $fname=$env{'form.folder'}.'/'.$fname;
1266: return &process_coursefile('uploaddoc',$docuname,$docudom,$docuhome,$fname,$formname);
1267: }
1268: } else {
1269: $docuname=$env{'user.name'};
1270: $docudom=$env{'user.domain'};
1271: $docuhome=$env{'user.home'};
1272: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1273: }
1274: }
1275:
1276: sub finishuserfileupload {
1277: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1278: my $path=$docudom.'/'.$docuname.'/';
1279: my $filepath=$perlvar{'lonDocRoot'};
1280: my ($fnamepath,$file);
1281: $file=$fname;
1282: if ($fname=~m|/|) {
1283: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1284: $path.=$fnamepath.'/';
1285: }
1286: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1287: my $count;
1288: for ($count=4;$count<=$#parts;$count++) {
1289: $filepath.="/$parts[$count]";
1290: if ((-e $filepath)!=1) {
1291: mkdir($filepath,0777);
1292: }
1293: }
1294: # Save the file
1295: {
1296: open(FH,'>'.$filepath.'/'.$file);
1297: print FH $env{'form.'.$formname};
1298: close(FH);
1299: }
1300: # Notify homeserver to grep it
1301: #
1302: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1303: if ($fetchresult eq 'ok') {
1304: #
1305: # Return the URL to it
1306: return '/uploaded/'.$path.$file;
1307: } else {
1308: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1309: ': '.$fetchresult);
1310: return '/adm/notfound.html';
1311: }
1312: }
1313:
1314: sub removeuploadedurl {
1315: my ($url)=@_;
1316: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1317: return &removeuserfile($uname,$udom,$fname);
1318: }
1319:
1320: sub removeuserfile {
1321: my ($docuname,$docudom,$fname)=@_;
1322: my $home=&homeserver($docuname,$docudom);
1323: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1324: }
1325:
1326: sub mkdiruserfile {
1327: my ($docuname,$docudom,$dir)=@_;
1328: my $home=&homeserver($docuname,$docudom);
1329: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1330: }
1331:
1332: sub renameuserfile {
1333: my ($docuname,$docudom,$old,$new)=@_;
1334: my $home=&homeserver($docuname,$docudom);
1335: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1336: &escape("$new"),$home);
1337: }
1338:
1339: # ------------------------------------------------------------------------- Log
1340:
1341: sub log {
1342: my ($dom,$nam,$hom,$what)=@_;
1343: return critical("log:$dom:$nam:$what",$hom);
1344: }
1345:
1346: # ------------------------------------------------------------------ Course Log
1347: #
1348: # This routine flushes several buffers of non-mission-critical nature
1349: #
1350:
1351: sub flushcourselogs {
1352: &logthis('Flushing log buffers');
1353: #
1354: # course logs
1355: # This is a log of all transactions in a course, which can be used
1356: # for data mining purposes
1357: #
1358: # It also collects the courseid database, which lists last transaction
1359: # times and course titles for all courseids
1360: #
1361: my %courseidbuffer=();
1362: foreach (keys %courselogs) {
1363: my $crsid=$_;
1364: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1365: &escape($courselogs{$crsid}),
1366: $coursehombuf{$crsid}) eq 'ok') {
1367: delete $courselogs{$crsid};
1368: } else {
1369: &logthis('Failed to flush log buffer for '.$crsid);
1370: if (length($courselogs{$crsid})>40000) {
1371: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1372: " exceeded maximum size, deleting.</font>");
1373: delete $courselogs{$crsid};
1374: }
1375: }
1376: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1377: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1378: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1379: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1380: } else {
1381: $courseidbuffer{$coursehombuf{$crsid}}=
1382: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1383: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1384: }
1385: }
1386: #
1387: # Write course id database (reverse lookup) to homeserver of courses
1388: # Is used in pickcourse
1389: #
1390: foreach (keys %courseidbuffer) {
1391: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1392: }
1393: #
1394: # File accesses
1395: # Writes to the dynamic metadata of resources to get hit counts, etc.
1396: #
1397: foreach my $entry (keys(%accesshash)) {
1398: if ($entry =~ /___count$/) {
1399: my ($dom,$name);
1400: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1401: if (! defined($dom) || $dom eq '' ||
1402: ! defined($name) || $name eq '') {
1403: my $cid = $env{'request.course.id'};
1404: $dom = $env{'request.'.$cid.'.domain'};
1405: $name = $env{'request.'.$cid.'.num'};
1406: }
1407: my $value = $accesshash{$entry};
1408: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1409: my %temphash=($url => $value);
1410: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1411: if ($result eq 'ok') {
1412: delete $accesshash{$entry};
1413: } elsif ($result eq 'unknown_cmd') {
1414: # Target server has old code running on it.
1415: my %temphash=($entry => $value);
1416: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1417: delete $accesshash{$entry};
1418: }
1419: }
1420: } else {
1421: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1422: my %temphash=($entry => $accesshash{$entry});
1423: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1424: delete $accesshash{$entry};
1425: }
1426: }
1427: }
1428: #
1429: # Roles
1430: # Reverse lookup of user roles for course faculty/staff and co-authorship
1431: #
1432: foreach (keys %userrolehash) {
1433: my $entry=$_;
1434: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1435: split(/\:/,$entry);
1436: if (&Apache::lonnet::put('nohist_userroles',
1437: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1438: $rudom,$runame) eq 'ok') {
1439: delete $userrolehash{$entry};
1440: }
1441: }
1442: $dumpcount++;
1443: }
1444:
1445: sub courselog {
1446: my $what=shift;
1447: $what=time.':'.$what;
1448: unless ($env{'request.course.id'}) { return ''; }
1449: $coursedombuf{$env{'request.course.id'}}=
1450: $env{'course.'.$env{'request.course.id'}.'.domain'};
1451: $coursenumbuf{$env{'request.course.id'}}=
1452: $env{'course.'.$env{'request.course.id'}.'.num'};
1453: $coursehombuf{$env{'request.course.id'}}=
1454: $env{'course.'.$env{'request.course.id'}.'.home'};
1455: $coursedescrbuf{$env{'request.course.id'}}=
1456: $env{'course.'.$env{'request.course.id'}.'.description'};
1457: $courseinstcodebuf{$env{'request.course.id'}}=
1458: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1459: $courseownerbuf{$env{'request.course.id'}}=
1460: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1461: if (defined $courselogs{$env{'request.course.id'}}) {
1462: $courselogs{$env{'request.course.id'}}.='&'.$what;
1463: } else {
1464: $courselogs{$env{'request.course.id'}}.=$what;
1465: }
1466: if (length($courselogs{$env{'request.course.id'}})>4048) {
1467: &flushcourselogs();
1468: }
1469: }
1470:
1471: sub courseacclog {
1472: my $fnsymb=shift;
1473: unless ($env{'request.course.id'}) { return ''; }
1474: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1475: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1476: $what.=':POST';
1477: # FIXME: Probably ought to escape things....
1478: foreach (keys %env) {
1479: if ($_=~/^form\.(.*)/) {
1480: $what.=':'.$1.'='.$env{$_};
1481: }
1482: }
1483: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1484: # FIXME: We should not be depending on a form parameter that someone
1485: # editing lonsearchcat.pm might change in the future.
1486: if ($env{'form.phase'} eq 'course_search') {
1487: $what.= ':POST';
1488: # FIXME: Probably ought to escape things....
1489: foreach my $element ('courseexp','crsfulltext','crsrelated',
1490: 'crsdiscuss') {
1491: $what.=':'.$element.'='.$env{'form.'.$element};
1492: }
1493: }
1494: }
1495: &courselog($what);
1496: }
1497:
1498: sub countacc {
1499: my $url=&declutter(shift);
1500: return if (! defined($url) || $url eq '');
1501: unless ($env{'request.course.id'}) { return ''; }
1502: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1503: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1504: $accesshash{$key}++;
1505: }
1506:
1507: sub linklog {
1508: my ($from,$to)=@_;
1509: $from=&declutter($from);
1510: $to=&declutter($to);
1511: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1512: $accesshash{$to.'___'.$from.'___goto'}=1;
1513: }
1514:
1515: sub userrolelog {
1516: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1517: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1518: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1519: ($trole=~/^cr/) || ($trole=~/^ta/)) {
1520: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1521: $userrolehash
1522: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1523: =$tend.':'.$tstart;
1524: }
1525: }
1526:
1527: sub get_course_adv_roles {
1528: my $cid=shift;
1529: $cid=$env{'request.course.id'} unless (defined($cid));
1530: my %coursehash=&coursedescription($cid);
1531: my %nothide=();
1532: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1533: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1534: }
1535: my %returnhash=();
1536: my %dumphash=
1537: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1538: my $now=time;
1539: foreach (keys %dumphash) {
1540: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1541: if (($tstart) && ($tstart<0)) { next; }
1542: if (($tend) && ($tend<$now)) { next; }
1543: if (($tstart) && ($now<$tstart)) { next; }
1544: my ($role,$username,$domain,$section)=split(/\:/,$_);
1545: if ($username eq '' || $domain eq '') { next; }
1546: if ((&privileged($username,$domain)) &&
1547: (!$nothide{$username.':'.$domain})) { next; }
1548: my $key=&plaintext($role);
1549: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1550: if ($returnhash{$key}) {
1551: $returnhash{$key}.=','.$username.':'.$domain;
1552: } else {
1553: $returnhash{$key}=$username.':'.$domain;
1554: }
1555: }
1556: return %returnhash;
1557: }
1558:
1559: sub get_my_roles {
1560: my ($uname,$udom)=@_;
1561: unless (defined($uname)) { $uname=$env{'user.name'}; }
1562: unless (defined($udom)) { $udom=$env{'user.domain'}; }
1563: my %dumphash=
1564: &dump('nohist_userroles',$udom,$uname);
1565: my %returnhash=();
1566: my $now=time;
1567: foreach (keys %dumphash) {
1568: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1569: if (($tstart) && ($tstart<0)) { next; }
1570: if (($tend) && ($tend<$now)) { next; }
1571: if (($tstart) && ($now<$tstart)) { next; }
1572: my ($role,$username,$domain,$section)=split(/\:/,$_);
1573: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1574: }
1575: return %returnhash;
1576: }
1577:
1578: # ----------------------------------------------------- Frontpage Announcements
1579: #
1580: #
1581:
1582: sub postannounce {
1583: my ($server,$text)=@_;
1584: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1585: unless ($text=~/\w/) { $text=''; }
1586: return &reply('setannounce:'.&escape($text),$server);
1587: }
1588:
1589: sub getannounce {
1590:
1591: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1592: my $announcement='';
1593: while (<$fh>) { $announcement .=$_; }
1594: close($fh);
1595: if ($announcement=~/\w/) {
1596: return
1597: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1598: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1599: } else {
1600: return '';
1601: }
1602: } else {
1603: return '';
1604: }
1605: }
1606:
1607: # ---------------------------------------------------------- Course ID routines
1608: # Deal with domain's nohist_courseid.db files
1609: #
1610:
1611: sub courseidput {
1612: my ($domain,$what,$coursehome)=@_;
1613: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1614: }
1615:
1616: sub courseiddump {
1617: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref)=@_;
1618: my %returnhash=();
1619: unless ($domfilter) { $domfilter=''; }
1620: foreach my $tryserver (keys %libserv) {
1621: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1622: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1623: foreach (
1624: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1625: $sincefilter.':'.&escape($descfilter).':'.
1626: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter),
1627: $tryserver))) {
1628: my ($key,$value)=split(/\=/,$_);
1629: if (($key) && ($value)) {
1630: $returnhash{&unescape($key)}=$value;
1631: }
1632: }
1633: }
1634: }
1635: }
1636: return %returnhash;
1637: }
1638:
1639: #
1640: # ----------------------------------------------------------- Check out an item
1641:
1642: sub get_first_access {
1643: my ($type,$argsymb)=@_;
1644: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1645: if ($argsymb) { $symb=$argsymb; }
1646: my ($map,$id,$res)=&decode_symb($symb);
1647: if ($type eq 'map') {
1648: $res=&symbread($map);
1649: } else {
1650: $res=$symb;
1651: }
1652: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
1653: return $times{"$courseid\0$res"};
1654: }
1655:
1656: sub set_first_access {
1657: my ($type)=@_;
1658: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1659: my ($map,$id,$res)=&decode_symb($symb);
1660: if ($type eq 'map') {
1661: $res=&symbread($map);
1662: } else {
1663: $res=$symb;
1664: }
1665: my $firstaccess=&get_first_access($type,$symb);
1666: if (!$firstaccess) {
1667: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
1668: }
1669: return 'already_set';
1670: }
1671:
1672: sub checkout {
1673: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1674: my $now=time;
1675: my $lonhost=$perlvar{'lonHostID'};
1676: my $infostr=&escape(
1677: 'CHECKOUTTOKEN&'.
1678: $tuname.'&'.
1679: $tudom.'&'.
1680: $tcrsid.'&'.
1681: $symb.'&'.
1682: $now.'&'.$ENV{'REMOTE_ADDR'});
1683: my $token=&reply('tmpput:'.$infostr,$lonhost);
1684: if ($token=~/^error\:/) {
1685: &logthis("<font color=blue>WARNING: ".
1686: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1687: "</font>");
1688: return '';
1689: }
1690:
1691: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1692: $token=~tr/a-z/A-Z/;
1693:
1694: my %infohash=('resource.0.outtoken' => $token,
1695: 'resource.0.checkouttime' => $now,
1696: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1697:
1698: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1699: return '';
1700: } else {
1701: &logthis("<font color=blue>WARNING: ".
1702: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1703: "</font>");
1704: }
1705:
1706: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1707: &escape('Checkout '.$infostr.' - '.
1708: $token)) ne 'ok') {
1709: return '';
1710: } else {
1711: &logthis("<font color=blue>WARNING: ".
1712: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1713: "</font>");
1714: }
1715: return $token;
1716: }
1717:
1718: # ------------------------------------------------------------ Check in an item
1719:
1720: sub checkin {
1721: my $token=shift;
1722: my $now=time;
1723: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1724: $lonhost=~tr/A-Z/a-z/;
1725: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
1726: $dtoken=~s/\W/\_/g;
1727: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1728: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1729:
1730: unless (($tuname) && ($tudom)) {
1731: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1732: return '';
1733: }
1734:
1735: unless (&allowed('mgr',$tcrsid)) {
1736: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1737: $env{'user.name'}.' - '.$env{'user.domain'});
1738: return '';
1739: }
1740:
1741: my %infohash=('resource.0.intoken' => $token,
1742: 'resource.0.checkintime' => $now,
1743: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1744:
1745: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1746: return '';
1747: }
1748:
1749: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1750: &escape('Checkin - '.$token)) ne 'ok') {
1751: return '';
1752: }
1753:
1754: return ($symb,$tuname,$tudom,$tcrsid);
1755: }
1756:
1757: # --------------------------------------------- Set Expire Date for Spreadsheet
1758:
1759: sub expirespread {
1760: my ($uname,$udom,$stype,$usymb)=@_;
1761: my $cid=$env{'request.course.id'};
1762: if ($cid) {
1763: my $now=time;
1764: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1765: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
1766: $env{'course.'.$cid.'.num'}.
1767: ':nohist_expirationdates:'.
1768: &escape($key).'='.$now,
1769: $env{'course.'.$cid.'.home'})
1770: }
1771: return 'ok';
1772: }
1773:
1774: # ----------------------------------------------------- Devalidate Spreadsheets
1775:
1776: sub devalidate {
1777: my ($symb,$uname,$udom)=@_;
1778: my $cid=$env{'request.course.id'};
1779: if ($cid) {
1780: # delete the stored spreadsheets for
1781: # - the student level sheet of this user in course's homespace
1782: # - the assessment level sheet for this resource
1783: # for this user in user's homespace
1784: # - current conditional state info
1785: my $key=$uname.':'.$udom.':';
1786: my $status=
1787: &del('nohist_calculatedsheets',
1788: [$key.'studentcalc:'],
1789: $env{'course.'.$cid.'.domain'},
1790: $env{'course.'.$cid.'.num'})
1791: .' '.
1792: &del('nohist_calculatedsheets_'.$cid,
1793: [$key.'assesscalc:'.$symb],$udom,$uname);
1794: unless ($status eq 'ok ok') {
1795: &logthis('Could not devalidate spreadsheet '.
1796: $uname.' at '.$udom.' for '.
1797: $symb.': '.$status);
1798: }
1799: &delenv('user.state.'.$cid);
1800: }
1801: }
1802:
1803: sub get_scalar {
1804: my ($string,$end) = @_;
1805: my $value;
1806: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1807: $value = $1;
1808: } elsif ($$string =~ s/^([^&]*?)&//) {
1809: $value = $1;
1810: }
1811: return &unescape($value);
1812: }
1813:
1814: sub array2str {
1815: my (@array) = @_;
1816: my $result=&arrayref2str(\@array);
1817: $result=~s/^__ARRAY_REF__//;
1818: $result=~s/__END_ARRAY_REF__$//;
1819: return $result;
1820: }
1821:
1822: sub arrayref2str {
1823: my ($arrayref) = @_;
1824: my $result='__ARRAY_REF__';
1825: foreach my $elem (@$arrayref) {
1826: if(ref($elem) eq 'ARRAY') {
1827: $result.=&arrayref2str($elem).'&';
1828: } elsif(ref($elem) eq 'HASH') {
1829: $result.=&hashref2str($elem).'&';
1830: } elsif(ref($elem)) {
1831: #print("Got a ref of ".(ref($elem))." skipping.");
1832: } else {
1833: $result.=&escape($elem).'&';
1834: }
1835: }
1836: $result=~s/\&$//;
1837: $result .= '__END_ARRAY_REF__';
1838: return $result;
1839: }
1840:
1841: sub hash2str {
1842: my (%hash) = @_;
1843: my $result=&hashref2str(\%hash);
1844: $result=~s/^__HASH_REF__//;
1845: $result=~s/__END_HASH_REF__$//;
1846: return $result;
1847: }
1848:
1849: sub hashref2str {
1850: my ($hashref)=@_;
1851: my $result='__HASH_REF__';
1852: foreach (sort(keys(%$hashref))) {
1853: if (ref($_) eq 'ARRAY') {
1854: $result.=&arrayref2str($_).'=';
1855: } elsif (ref($_) eq 'HASH') {
1856: $result.=&hashref2str($_).'=';
1857: } elsif (ref($_)) {
1858: $result.='=';
1859: #print("Got a ref of ".(ref($_))." skipping.");
1860: } else {
1861: if ($_) {$result.=&escape($_).'=';} else { last; }
1862: }
1863:
1864: if(ref($hashref->{$_}) eq 'ARRAY') {
1865: $result.=&arrayref2str($hashref->{$_}).'&';
1866: } elsif(ref($hashref->{$_}) eq 'HASH') {
1867: $result.=&hashref2str($hashref->{$_}).'&';
1868: } elsif(ref($hashref->{$_})) {
1869: $result.='&';
1870: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1871: } else {
1872: $result.=&escape($hashref->{$_}).'&';
1873: }
1874: }
1875: $result=~s/\&$//;
1876: $result .= '__END_HASH_REF__';
1877: return $result;
1878: }
1879:
1880: sub str2hash {
1881: my ($string)=@_;
1882: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1883: return %$hash;
1884: }
1885:
1886: sub str2hashref {
1887: my ($string) = @_;
1888:
1889: my %hash;
1890:
1891: if($string !~ /^__HASH_REF__/) {
1892: if (! ($string eq '' || !defined($string))) {
1893: $hash{'error'}='Not hash reference';
1894: }
1895: return (\%hash, $string);
1896: }
1897:
1898: $string =~ s/^__HASH_REF__//;
1899:
1900: while($string !~ /^__END_HASH_REF__/) {
1901: #key
1902: my $key='';
1903: if($string =~ /^__HASH_REF__/) {
1904: ($key, $string)=&str2hashref($string);
1905: if(defined($key->{'error'})) {
1906: $hash{'error'}='Bad data';
1907: return (\%hash, $string);
1908: }
1909: } elsif($string =~ /^__ARRAY_REF__/) {
1910: ($key, $string)=&str2arrayref($string);
1911: if($key->[0] eq 'Array reference error') {
1912: $hash{'error'}='Bad data';
1913: return (\%hash, $string);
1914: }
1915: } else {
1916: $string =~ s/^(.*?)=//;
1917: $key=&unescape($1);
1918: }
1919: $string =~ s/^=//;
1920:
1921: #value
1922: my $value='';
1923: if($string =~ /^__HASH_REF__/) {
1924: ($value, $string)=&str2hashref($string);
1925: if(defined($value->{'error'})) {
1926: $hash{'error'}='Bad data';
1927: return (\%hash, $string);
1928: }
1929: } elsif($string =~ /^__ARRAY_REF__/) {
1930: ($value, $string)=&str2arrayref($string);
1931: if($value->[0] eq 'Array reference error') {
1932: $hash{'error'}='Bad data';
1933: return (\%hash, $string);
1934: }
1935: } else {
1936: $value=&get_scalar(\$string,'__END_HASH_REF__');
1937: }
1938: $string =~ s/^&//;
1939:
1940: $hash{$key}=$value;
1941: }
1942:
1943: $string =~ s/^__END_HASH_REF__//;
1944:
1945: return (\%hash, $string);
1946: }
1947:
1948: sub str2array {
1949: my ($string)=@_;
1950: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1951: return @$array;
1952: }
1953:
1954: sub str2arrayref {
1955: my ($string) = @_;
1956: my @array;
1957:
1958: if($string !~ /^__ARRAY_REF__/) {
1959: if (! ($string eq '' || !defined($string))) {
1960: $array[0]='Array reference error';
1961: }
1962: return (\@array, $string);
1963: }
1964:
1965: $string =~ s/^__ARRAY_REF__//;
1966:
1967: while($string !~ /^__END_ARRAY_REF__/) {
1968: my $value='';
1969: if($string =~ /^__HASH_REF__/) {
1970: ($value, $string)=&str2hashref($string);
1971: if(defined($value->{'error'})) {
1972: $array[0] ='Array reference error';
1973: return (\@array, $string);
1974: }
1975: } elsif($string =~ /^__ARRAY_REF__/) {
1976: ($value, $string)=&str2arrayref($string);
1977: if($value->[0] eq 'Array reference error') {
1978: $array[0] ='Array reference error';
1979: return (\@array, $string);
1980: }
1981: } else {
1982: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1983: }
1984: $string =~ s/^&//;
1985:
1986: push(@array, $value);
1987: }
1988:
1989: $string =~ s/^__END_ARRAY_REF__//;
1990:
1991: return (\@array, $string);
1992: }
1993:
1994: # -------------------------------------------------------------------Temp Store
1995:
1996: sub tmpreset {
1997: my ($symb,$namespace,$domain,$stuname) = @_;
1998: if (!$symb) {
1999: $symb=&symbread();
2000: if (!$symb) { $symb= $env{'request.url'}; }
2001: }
2002: $symb=escape($symb);
2003:
2004: if (!$namespace) { $namespace=$env{'request.state'}; }
2005: $namespace=~s/\//\_/g;
2006: $namespace=~s/\W//g;
2007:
2008: if (!$domain) { $domain=$env{'user.domain'}; }
2009: if (!$stuname) { $stuname=$env{'user.name'}; }
2010: if ($domain eq 'public' && $stuname eq 'public') {
2011: $stuname=$ENV{'REMOTE_ADDR'};
2012: }
2013: my $path=$perlvar{'lonDaemons'}.'/tmp';
2014: my %hash;
2015: if (tie(%hash,'GDBM_File',
2016: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2017: &GDBM_WRCREAT(),0640)) {
2018: foreach my $key (keys %hash) {
2019: if ($key=~ /:$symb/) {
2020: delete($hash{$key});
2021: }
2022: }
2023: }
2024: }
2025:
2026: sub tmpstore {
2027: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2028:
2029: if (!$symb) {
2030: $symb=&symbread();
2031: if (!$symb) { $symb= $env{'request.url'}; }
2032: }
2033: $symb=escape($symb);
2034:
2035: if (!$namespace) {
2036: # I don't think we would ever want to store this for a course.
2037: # it seems this will only be used if we don't have a course.
2038: #$namespace=$env{'request.course.id'};
2039: #if (!$namespace) {
2040: $namespace=$env{'request.state'};
2041: #}
2042: }
2043: $namespace=~s/\//\_/g;
2044: $namespace=~s/\W//g;
2045: if (!$domain) { $domain=$env{'user.domain'}; }
2046: if (!$stuname) { $stuname=$env{'user.name'}; }
2047: if ($domain eq 'public' && $stuname eq 'public') {
2048: $stuname=$ENV{'REMOTE_ADDR'};
2049: }
2050: my $now=time;
2051: my %hash;
2052: my $path=$perlvar{'lonDaemons'}.'/tmp';
2053: if (tie(%hash,'GDBM_File',
2054: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2055: &GDBM_WRCREAT(),0640)) {
2056: $hash{"version:$symb"}++;
2057: my $version=$hash{"version:$symb"};
2058: my $allkeys='';
2059: foreach my $key (keys(%$storehash)) {
2060: $allkeys.=$key.':';
2061: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2062: }
2063: $hash{"$version:$symb:timestamp"}=$now;
2064: $allkeys.='timestamp';
2065: $hash{"$version:keys:$symb"}=$allkeys;
2066: if (untie(%hash)) {
2067: return 'ok';
2068: } else {
2069: return "error:$!";
2070: }
2071: } else {
2072: return "error:$!";
2073: }
2074: }
2075:
2076: # -----------------------------------------------------------------Temp Restore
2077:
2078: sub tmprestore {
2079: my ($symb,$namespace,$domain,$stuname) = @_;
2080:
2081: if (!$symb) {
2082: $symb=&symbread();
2083: if (!$symb) { $symb= $env{'request.url'}; }
2084: }
2085: $symb=escape($symb);
2086:
2087: if (!$namespace) { $namespace=$env{'request.state'}; }
2088:
2089: if (!$domain) { $domain=$env{'user.domain'}; }
2090: if (!$stuname) { $stuname=$env{'user.name'}; }
2091: if ($domain eq 'public' && $stuname eq 'public') {
2092: $stuname=$ENV{'REMOTE_ADDR'};
2093: }
2094: my %returnhash;
2095: $namespace=~s/\//\_/g;
2096: $namespace=~s/\W//g;
2097: my %hash;
2098: my $path=$perlvar{'lonDaemons'}.'/tmp';
2099: if (tie(%hash,'GDBM_File',
2100: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2101: &GDBM_READER(),0640)) {
2102: my $version=$hash{"version:$symb"};
2103: $returnhash{'version'}=$version;
2104: my $scope;
2105: for ($scope=1;$scope<=$version;$scope++) {
2106: my $vkeys=$hash{"$scope:keys:$symb"};
2107: my @keys=split(/:/,$vkeys);
2108: my $key;
2109: $returnhash{"$scope:keys"}=$vkeys;
2110: foreach $key (@keys) {
2111: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2112: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2113: }
2114: }
2115: if (!(untie(%hash))) {
2116: return "error:$!";
2117: }
2118: } else {
2119: return "error:$!";
2120: }
2121: return %returnhash;
2122: }
2123:
2124: # ----------------------------------------------------------------------- Store
2125:
2126: sub store {
2127: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2128: my $home='';
2129:
2130: if ($stuname) { $home=&homeserver($stuname,$domain); }
2131:
2132: $symb=&symbclean($symb);
2133: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2134:
2135: if (!$domain) { $domain=$env{'user.domain'}; }
2136: if (!$stuname) { $stuname=$env{'user.name'}; }
2137:
2138: &devalidate($symb,$stuname,$domain);
2139:
2140: $symb=escape($symb);
2141: if (!$namespace) {
2142: unless ($namespace=$env{'request.course.id'}) {
2143: return '';
2144: }
2145: }
2146: if (!$home) { $home=$env{'user.home'}; }
2147:
2148: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2149: $$storehash{'host'}=$perlvar{'lonHostID'};
2150:
2151: my $namevalue='';
2152: foreach (keys %$storehash) {
2153: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2154: }
2155: $namevalue=~s/\&$//;
2156: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2157: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2158: }
2159:
2160: # -------------------------------------------------------------- Critical Store
2161:
2162: sub cstore {
2163: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2164: my $home='';
2165:
2166: if ($stuname) { $home=&homeserver($stuname,$domain); }
2167:
2168: $symb=&symbclean($symb);
2169: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2170:
2171: if (!$domain) { $domain=$env{'user.domain'}; }
2172: if (!$stuname) { $stuname=$env{'user.name'}; }
2173:
2174: &devalidate($symb,$stuname,$domain);
2175:
2176: $symb=escape($symb);
2177: if (!$namespace) {
2178: unless ($namespace=$env{'request.course.id'}) {
2179: return '';
2180: }
2181: }
2182: if (!$home) { $home=$env{'user.home'}; }
2183:
2184: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2185: $$storehash{'host'}=$perlvar{'lonHostID'};
2186:
2187: my $namevalue='';
2188: foreach (keys %$storehash) {
2189: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2190: }
2191: $namevalue=~s/\&$//;
2192: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2193: return critical
2194: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2195: }
2196:
2197: # --------------------------------------------------------------------- Restore
2198:
2199: sub restore {
2200: my ($symb,$namespace,$domain,$stuname) = @_;
2201: my $home='';
2202:
2203: if ($stuname) { $home=&homeserver($stuname,$domain); }
2204:
2205: if (!$symb) {
2206: unless ($symb=escape(&symbread())) { return ''; }
2207: } else {
2208: $symb=&escape(&symbclean($symb));
2209: }
2210: if (!$namespace) {
2211: unless ($namespace=$env{'request.course.id'}) {
2212: return '';
2213: }
2214: }
2215: if (!$domain) { $domain=$env{'user.domain'}; }
2216: if (!$stuname) { $stuname=$env{'user.name'}; }
2217: if (!$home) { $home=$env{'user.home'}; }
2218: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2219:
2220: my %returnhash=();
2221: foreach (split(/\&/,$answer)) {
2222: my ($name,$value)=split(/\=/,$_);
2223: $returnhash{&unescape($name)}=&thaw_unescape($value);
2224: }
2225: my $version;
2226: for ($version=1;$version<=$returnhash{'version'};$version++) {
2227: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2228: $returnhash{$_}=$returnhash{$version.':'.$_};
2229: }
2230: }
2231: return %returnhash;
2232: }
2233:
2234: # ---------------------------------------------------------- Course Description
2235:
2236: sub coursedescription {
2237: my $courseid=shift;
2238: $courseid=~s/^\///;
2239: $courseid=~s/\_/\//g;
2240: my ($cdomain,$cnum)=split(/\//,$courseid);
2241: my $chome=&homeserver($cnum,$cdomain);
2242: my $normalid=$cdomain.'_'.$cnum;
2243: # need to always cache even if we get errors otherwise we keep
2244: # trying and trying and trying to get the course description.
2245: my %envhash=();
2246: my %returnhash=();
2247: $envhash{'course.'.$normalid.'.last_cache'}=time;
2248: if ($chome ne 'no_host') {
2249: %returnhash=&dump('environment',$cdomain,$cnum);
2250: if (!exists($returnhash{'con_lost'})) {
2251: $returnhash{'home'}= $chome;
2252: $returnhash{'domain'} = $cdomain;
2253: $returnhash{'num'} = $cnum;
2254: while (my ($name,$value) = each %returnhash) {
2255: $envhash{'course.'.$normalid.'.'.$name}=$value;
2256: }
2257: $returnhash{'url'}=&clutter($returnhash{'url'});
2258: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2259: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2260: $envhash{'course.'.$normalid.'.home'}=$chome;
2261: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2262: $envhash{'course.'.$normalid.'.num'}=$cnum;
2263: }
2264: }
2265: &appenv(%envhash);
2266: return %returnhash;
2267: }
2268:
2269: # -------------------------------------------------See if a user is privileged
2270:
2271: sub privileged {
2272: my ($username,$domain)=@_;
2273: my $rolesdump=&reply("dump:$domain:$username:roles",
2274: &homeserver($username,$domain));
2275: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2276: my $now=time;
2277: if ($rolesdump ne '') {
2278: foreach (split(/&/,$rolesdump)) {
2279: if ($_!~/^rolesdef_/) {
2280: my ($area,$role)=split(/=/,$_);
2281: $area=~s/\_\w\w$//;
2282: my ($trole,$tend,$tstart)=split(/_/,$role);
2283: if (($trole eq 'dc') || ($trole eq 'su')) {
2284: my $active=1;
2285: if ($tend) {
2286: if ($tend<$now) { $active=0; }
2287: }
2288: if ($tstart) {
2289: if ($tstart>$now) { $active=0; }
2290: }
2291: if ($active) { return 1; }
2292: }
2293: }
2294: }
2295: }
2296: return 0;
2297: }
2298:
2299: # -------------------------------------------------------- Get user privileges
2300:
2301: sub rolesinit {
2302: my ($domain,$username,$authhost)=@_;
2303: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2304: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2305: my %allroles=();
2306: my $now=time;
2307: my $userroles="user.login.time=$now\n";
2308:
2309: if ($rolesdump ne '') {
2310: foreach (split(/&/,$rolesdump)) {
2311: if ($_!~/^rolesdef_/) {
2312: my ($area,$role)=split(/=/,$_);
2313: $area=~s/\_\w\w$//;
2314:
2315: my ($trole,$tend,$tstart);
2316: if ($role=~/^cr/) {
2317: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2318: ($tend,$tstart)=split('_',$trest);
2319: } else {
2320: ($trole,$tend,$tstart)=split(/_/,$role);
2321: }
2322: $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username);
2323: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2324: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2325: if (($area ne '') && ($trole ne '')) {
2326: my $spec=$trole.'.'.$area;
2327: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2328: if ($trole =~ /^cr\//) {
2329: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2330: } else {
2331: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2332: }
2333: }
2334: }
2335: }
2336: my ($author,$adv) = &set_userprivs(\$userroles,\%allroles);
2337: $userroles.='user.adv='.$adv."\n".
2338: 'user.author='.$author."\n";
2339: $env{'user.adv'}=$adv;
2340: }
2341: return $userroles;
2342: }
2343:
2344: sub set_arearole {
2345: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2346: # log the associated role with the area
2347: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2348: return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
2349: }
2350:
2351: sub custom_roleprivs {
2352: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2353: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2354: my $homsvr=homeserver($rauthor,$rdomain);
2355: if ($hostname{$homsvr} ne '') {
2356: my ($rdummy,$roledef)=
2357: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2358: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2359: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2360: if (defined($syspriv)) {
2361: $$allroles{'cm./'}.=':'.$syspriv;
2362: $$allroles{$spec.'./'}.=':'.$syspriv;
2363: }
2364: if ($tdomain ne '') {
2365: if (defined($dompriv)) {
2366: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2367: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2368: }
2369: if (($trest ne '') && (defined($coursepriv))) {
2370: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2371: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2372: }
2373: }
2374: }
2375: }
2376: }
2377:
2378:
2379: sub standard_roleprivs {
2380: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2381: if (defined($pr{$trole.':s'})) {
2382: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2383: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2384: }
2385: if ($tdomain ne '') {
2386: if (defined($pr{$trole.':d'})) {
2387: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2388: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2389: }
2390: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2391: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2392: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2393: }
2394: }
2395: }
2396:
2397: sub set_userprivs {
2398: my ($userroles,$allroles) = @_;
2399: my $author=0;
2400: my $adv=0;
2401: foreach (keys %{$allroles}) {
2402: my %thesepriv=();
2403: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2404: foreach (split(/:/,$$allroles{$_})) {
2405: if ($_ ne '') {
2406: my ($privilege,$restrictions)=split(/&/,$_);
2407: if ($restrictions eq '') {
2408: $thesepriv{$privilege}='F';
2409: } elsif ($thesepriv{$privilege} ne 'F') {
2410: $thesepriv{$privilege}.=$restrictions;
2411: }
2412: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2413: }
2414: }
2415: my $thesestr='';
2416: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2417: $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
2418: }
2419: return ($author,$adv);
2420: }
2421:
2422: # --------------------------------------------------------------- get interface
2423:
2424: sub get {
2425: my ($namespace,$storearr,$udomain,$uname)=@_;
2426: my $items='';
2427: foreach (@$storearr) {
2428: $items.=escape($_).'&';
2429: }
2430: $items=~s/\&$//;
2431: if (!$udomain) { $udomain=$env{'user.domain'}; }
2432: if (!$uname) { $uname=$env{'user.name'}; }
2433: my $uhome=&homeserver($uname,$udomain);
2434:
2435: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2436: my @pairs=split(/\&/,$rep);
2437: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2438: return @pairs;
2439: }
2440: my %returnhash=();
2441: my $i=0;
2442: foreach (@$storearr) {
2443: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2444: $i++;
2445: }
2446: return %returnhash;
2447: }
2448:
2449: # --------------------------------------------------------------- del interface
2450:
2451: sub del {
2452: my ($namespace,$storearr,$udomain,$uname)=@_;
2453: my $items='';
2454: foreach (@$storearr) {
2455: $items.=escape($_).'&';
2456: }
2457: $items=~s/\&$//;
2458: if (!$udomain) { $udomain=$env{'user.domain'}; }
2459: if (!$uname) { $uname=$env{'user.name'}; }
2460: my $uhome=&homeserver($uname,$udomain);
2461:
2462: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2463: }
2464:
2465: # -------------------------------------------------------------- dump interface
2466:
2467: sub dump {
2468: my ($namespace,$udomain,$uname,$regexp)=@_;
2469: if (!$udomain) { $udomain=$env{'user.domain'}; }
2470: if (!$uname) { $uname=$env{'user.name'}; }
2471: my $uhome=&homeserver($uname,$udomain);
2472: if ($regexp) {
2473: $regexp=&escape($regexp);
2474: } else {
2475: $regexp='.';
2476: }
2477: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2478: my @pairs=split(/\&/,$rep);
2479: my %returnhash=();
2480: foreach (@pairs) {
2481: my ($key,$value)=split(/=/,$_);
2482: $returnhash{unescape($key)}=&thaw_unescape($value);
2483: }
2484: return %returnhash;
2485: }
2486:
2487: # -------------------------------------------------------------- keys interface
2488:
2489: sub getkeys {
2490: my ($namespace,$udomain,$uname)=@_;
2491: if (!$udomain) { $udomain=$env{'user.domain'}; }
2492: if (!$uname) { $uname=$env{'user.name'}; }
2493: my $uhome=&homeserver($uname,$udomain);
2494: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2495: my @keyarray=();
2496: foreach (split(/\&/,$rep)) {
2497: push (@keyarray,&unescape($_));
2498: }
2499: return @keyarray;
2500: }
2501:
2502: # --------------------------------------------------------------- currentdump
2503: sub currentdump {
2504: my ($courseid,$sdom,$sname)=@_;
2505: $courseid = $env{'request.course.id'} if (! defined($courseid));
2506: $sdom = $env{'user.domain'} if (! defined($sdom));
2507: $sname = $env{'user.name'} if (! defined($sname));
2508: my $uhome = &homeserver($sname,$sdom);
2509: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2510: return if ($rep =~ /^(error:|no_such_host)/);
2511: #
2512: my %returnhash=();
2513: #
2514: if ($rep eq "unknown_cmd") {
2515: # an old lond will not know currentdump
2516: # Do a dump and make it look like a currentdump
2517: my @tmp = &dump($courseid,$sdom,$sname,'.');
2518: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2519: my %hash = @tmp;
2520: @tmp=();
2521: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2522: } else {
2523: my @pairs=split(/\&/,$rep);
2524: foreach (@pairs) {
2525: my ($key,$value)=split(/=/,$_);
2526: my ($symb,$param) = split(/:/,$key);
2527: $returnhash{&unescape($symb)}->{&unescape($param)} =
2528: &thaw_unescape($value);
2529: }
2530: }
2531: return %returnhash;
2532: }
2533:
2534: sub convert_dump_to_currentdump{
2535: my %hash = %{shift()};
2536: my %returnhash;
2537: # Code ripped from lond, essentially. The only difference
2538: # here is the unescaping done by lonnet::dump(). Conceivably
2539: # we might run in to problems with parameter names =~ /^v\./
2540: while (my ($key,$value) = each(%hash)) {
2541: my ($v,$symb,$param) = split(/:/,$key);
2542: next if ($v eq 'version' || $symb eq 'keys');
2543: next if (exists($returnhash{$symb}) &&
2544: exists($returnhash{$symb}->{$param}) &&
2545: $returnhash{$symb}->{'v.'.$param} > $v);
2546: $returnhash{$symb}->{$param}=$value;
2547: $returnhash{$symb}->{'v.'.$param}=$v;
2548: }
2549: #
2550: # Remove all of the keys in the hashes which keep track of
2551: # the version of the parameter.
2552: while (my ($symb,$param_hash) = each(%returnhash)) {
2553: # use a foreach because we are going to delete from the hash.
2554: foreach my $key (keys(%$param_hash)) {
2555: delete($param_hash->{$key}) if ($key =~ /^v\./);
2556: }
2557: }
2558: return \%returnhash;
2559: }
2560:
2561: # --------------------------------------------------------------- inc interface
2562:
2563: sub inc {
2564: my ($namespace,$store,$udomain,$uname) = @_;
2565: if (!$udomain) { $udomain=$env{'user.domain'}; }
2566: if (!$uname) { $uname=$env{'user.name'}; }
2567: my $uhome=&homeserver($uname,$udomain);
2568: my $items='';
2569: if (! ref($store)) {
2570: # got a single value, so use that instead
2571: $items = &escape($store).'=&';
2572: } elsif (ref($store) eq 'SCALAR') {
2573: $items = &escape($$store).'=&';
2574: } elsif (ref($store) eq 'ARRAY') {
2575: $items = join('=&',map {&escape($_);} @{$store});
2576: } elsif (ref($store) eq 'HASH') {
2577: while (my($key,$value) = each(%{$store})) {
2578: $items.= &escape($key).'='.&escape($value).'&';
2579: }
2580: }
2581: $items=~s/\&$//;
2582: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2583: }
2584:
2585: # --------------------------------------------------------------- put interface
2586:
2587: sub put {
2588: my ($namespace,$storehash,$udomain,$uname)=@_;
2589: if (!$udomain) { $udomain=$env{'user.domain'}; }
2590: if (!$uname) { $uname=$env{'user.name'}; }
2591: my $uhome=&homeserver($uname,$udomain);
2592: my $items='';
2593: foreach (keys %$storehash) {
2594: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2595: }
2596: $items=~s/\&$//;
2597: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2598: }
2599:
2600: # ---------------------------------------------------------- putstore interface
2601:
2602: sub putstore {
2603: my ($namespace,$storehash,$udomain,$uname)=@_;
2604: if (!$udomain) { $udomain=$env{'user.domain'}; }
2605: if (!$uname) { $uname=$env{'user.name'}; }
2606: my $uhome=&homeserver($uname,$udomain);
2607: my $items='';
2608: my %allitems = ();
2609: foreach (keys %$storehash) {
2610: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
2611: my $key = $1.':keys:'.$2;
2612: $allitems{$key} .= $3.':';
2613: }
2614: $items.=$_.'='.&freeze_escape($$storehash{$_}).'&';
2615: }
2616: foreach (keys %allitems) {
2617: $allitems{$_} =~ s/\:$//;
2618: $items.= $_.'='.$allitems{$_}.'&';
2619: }
2620: $items=~s/\&$//;
2621: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2622: }
2623:
2624: # ------------------------------------------------------ critical put interface
2625:
2626: sub cput {
2627: my ($namespace,$storehash,$udomain,$uname)=@_;
2628: if (!$udomain) { $udomain=$env{'user.domain'}; }
2629: if (!$uname) { $uname=$env{'user.name'}; }
2630: my $uhome=&homeserver($uname,$udomain);
2631: my $items='';
2632: foreach (keys %$storehash) {
2633: $items.=escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2634: }
2635: $items=~s/\&$//;
2636: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2637: }
2638:
2639: # -------------------------------------------------------------- eget interface
2640:
2641: sub eget {
2642: my ($namespace,$storearr,$udomain,$uname)=@_;
2643: my $items='';
2644: foreach (@$storearr) {
2645: $items.=escape($_).'&';
2646: }
2647: $items=~s/\&$//;
2648: if (!$udomain) { $udomain=$env{'user.domain'}; }
2649: if (!$uname) { $uname=$env{'user.name'}; }
2650: my $uhome=&homeserver($uname,$udomain);
2651: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2652: my @pairs=split(/\&/,$rep);
2653: my %returnhash=();
2654: my $i=0;
2655: foreach (@$storearr) {
2656: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2657: $i++;
2658: }
2659: return %returnhash;
2660: }
2661:
2662: # ---------------------------------------------- Custom access rule evaluation
2663:
2664: sub customaccess {
2665: my ($priv,$uri)=@_;
2666: my ($urole,$urealm)=split(/\./,$env{'request.role'});
2667: $urealm=~s/^\W//;
2668: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2669: my $access=0;
2670: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2671: my ($effect,$realm,$role)=split(/\:/,$_);
2672: if ($role) {
2673: if ($role ne $urole) { next; }
2674: }
2675: foreach (split(/\s*\,\s*/,$realm)) {
2676: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2677: if ($tdom) {
2678: if ($tdom ne $udom) { next; }
2679: }
2680: if ($tcrs) {
2681: if ($tcrs ne $ucrs) { next; }
2682: }
2683: if ($tsec) {
2684: if ($tsec ne $usec) { next; }
2685: }
2686: $access=($effect eq 'allow');
2687: last;
2688: }
2689: if ($realm eq '' && $role eq '') {
2690: $access=($effect eq 'allow');
2691: }
2692: }
2693: return $access;
2694: }
2695:
2696: # ------------------------------------------------- Check for a user privilege
2697:
2698: sub allowed {
2699: my ($priv,$uri,$symb)=@_;
2700: $uri=&deversion($uri);
2701: my $orguri=$uri;
2702: $uri=&declutter($uri);
2703:
2704:
2705:
2706: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
2707: # Free bre access to adm and meta resources
2708: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
2709: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2710: return 'F';
2711: }
2712:
2713: # Free bre access to user's own portfolio contents
2714: my ($space,$domain,$name,$dir)=split('/',$uri);
2715: if (($space=~/^(uploaded|ediupload)$/) && ($env{'user.name'} eq $name) &&
2716: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
2717: return 'F';
2718: }
2719:
2720: # Free bre to public access
2721:
2722: if ($priv eq 'bre') {
2723: my $copyright=&metadata($uri,'copyright');
2724: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
2725: return 'F';
2726: }
2727: if ($copyright eq 'priv') {
2728: $uri=~/([^\/]+)\/([^\/]+)\//;
2729: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
2730: return '';
2731: }
2732: }
2733: if ($copyright eq 'domain') {
2734: $uri=~/([^\/]+)\/([^\/]+)\//;
2735: unless (($env{'user.domain'} eq $1) ||
2736: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
2737: return '';
2738: }
2739: }
2740: if ($env{'request.role'}=~ /li\.\//) {
2741: # Library role, so allow browsing of resources in this domain.
2742: return 'F';
2743: }
2744: if ($copyright eq 'custom') {
2745: unless (&customaccess($priv,$uri)) { return ''; }
2746: }
2747: }
2748: # Domain coordinator is trying to create a course
2749: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
2750: # uri is the requested domain in this case.
2751: # comparison to 'request.role.domain' shows if the user has selected
2752: # a role of dc for the domain in question.
2753: return 'F' if ($uri eq $env{'request.role.domain'});
2754: }
2755:
2756: my $thisallowed='';
2757: my $statecond=0;
2758: my $courseprivid='';
2759:
2760: # Course
2761:
2762: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
2763: $thisallowed.=$1;
2764: }
2765:
2766: # Domain
2767:
2768: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2769: =~/\Q$priv\E\&([^\:]*)/) {
2770: $thisallowed.=$1;
2771: }
2772:
2773: # Course: uri itself is a course
2774: my $courseuri=$uri;
2775: $courseuri=~s/\_(\d)/\/$1/;
2776: $courseuri=~s/^([^\/])/\/$1/;
2777:
2778: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
2779: =~/\Q$priv\E\&([^\:]*)/) {
2780: $thisallowed.=$1;
2781: }
2782:
2783: # URI is an uploaded document for this course
2784: # not allowing 'edit' access (editupload) to uploaded course docs
2785: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
2786: my $refuri=$env{'httpref.'.$orguri};
2787: if ($refuri) {
2788: if ($refuri =~ m|^/adm/|) {
2789: $thisallowed='F';
2790: }
2791: }
2792: }
2793:
2794: # Full access at system, domain or course-wide level? Exit.
2795:
2796: if ($thisallowed=~/F/) {
2797: return 'F';
2798: }
2799:
2800: # If this is generating or modifying users, exit with special codes
2801:
2802: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:\Q$priv\E\:/) {
2803: return $thisallowed;
2804: }
2805: #
2806: # Gathered so far: system, domain and course wide privileges
2807: #
2808: # Course: See if uri or referer is an individual resource that is part of
2809: # the course
2810:
2811: if ($env{'request.course.id'}) {
2812:
2813: $courseprivid=$env{'request.course.id'};
2814: if ($env{'request.course.sec'}) {
2815: $courseprivid.='/'.$env{'request.course.sec'};
2816: }
2817: $courseprivid=~s/\_/\//;
2818: my $checkreferer=1;
2819: my ($match,$cond)=&is_on_map($uri);
2820: if ($match) {
2821: $statecond=$cond;
2822: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
2823: =~/\Q$priv\E\&([^\:]*)/) {
2824: $thisallowed.=$1;
2825: $checkreferer=0;
2826: }
2827: }
2828:
2829: if ($checkreferer) {
2830: my $refuri=$env{'httpref.'.$orguri};
2831: unless ($refuri) {
2832: foreach (keys %env) {
2833: if ($_=~/^httpref\..*\*/) {
2834: my $pattern=$_;
2835: $pattern=~s/^httpref\.\/res\///;
2836: $pattern=~s/\*/\[\^\/\]\+/g;
2837: $pattern=~s/\//\\\//g;
2838: if ($orguri=~/$pattern/) {
2839: $refuri=$env{$_};
2840: }
2841: }
2842: }
2843: }
2844:
2845: if ($refuri) {
2846: $refuri=&declutter($refuri);
2847: my ($match,$cond)=&is_on_map($refuri);
2848: if ($match) {
2849: my $refstatecond=$cond;
2850: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
2851: =~/\Q$priv\E\&([^\:]*)/) {
2852: $thisallowed.=$1;
2853: $uri=$refuri;
2854: $statecond=$refstatecond;
2855: }
2856: }
2857: }
2858: }
2859: }
2860:
2861: #
2862: # Gathered now: all privileges that could apply, and condition number
2863: #
2864: #
2865: # Full or no access?
2866: #
2867:
2868: if ($thisallowed=~/F/) {
2869: return 'F';
2870: }
2871:
2872: unless ($thisallowed) {
2873: return '';
2874: }
2875:
2876: # Restrictions exist, deal with them
2877: #
2878: # C:according to course preferences
2879: # R:according to resource settings
2880: # L:unless locked
2881: # X:according to user session state
2882: #
2883:
2884: # Possibly locked functionality, check all courses
2885: # Locks might take effect only after 10 minutes cache expiration for other
2886: # courses, and 2 minutes for current course
2887:
2888: my $envkey;
2889: if ($thisallowed=~/L/) {
2890: foreach $envkey (keys %env) {
2891: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2892: my $courseid=$2;
2893: my $roleid=$1.'.'.$2;
2894: $courseid=~s/^\///;
2895: my $expiretime=600;
2896: if ($env{'request.role'} eq $roleid) {
2897: $expiretime=120;
2898: }
2899: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2900: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2901: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
2902: &coursedescription($courseid);
2903: }
2904: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
2905: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2906: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2907: &log($env{'user.domain'},$env{'user.name'},
2908: $env{'user.home'},
2909: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2910: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2911: $env{$prefix.'priv.'.$priv.'.lock.expire'});
2912: return '';
2913: }
2914: }
2915: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
2916: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2917: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
2918: &log($env{'user.domain'},$env{'user.name'},
2919: $env{'user.home'},
2920: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2921: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2922: $env{$prefix.'priv.'.$priv.'.lock.expire'});
2923: return '';
2924: }
2925: }
2926: }
2927: }
2928: }
2929:
2930: #
2931: # Rest of the restrictions depend on selected course
2932: #
2933:
2934: unless ($env{'request.course.id'}) {
2935: return '1';
2936: }
2937:
2938: #
2939: # Now user is definitely in a course
2940: #
2941:
2942:
2943: # Course preferences
2944:
2945: if ($thisallowed=~/C/) {
2946: my $rolecode=(split(/\./,$env{'request.role'}))[0];
2947: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
2948: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
2949: =~/\Q$rolecode\E/) {
2950: &log($env{'user.domain'},$env{'user.name'},$env{'user.host'},
2951: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2952: $env{'request.course.id'});
2953: return '';
2954: }
2955:
2956: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
2957: =~/\Q$unamedom\E/) {
2958: &log($env{'user.domain'},$env{'user.name'},$env{'user.host'},
2959: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2960: $env{'request.course.id'});
2961: return '';
2962: }
2963: }
2964:
2965: # Resource preferences
2966:
2967: if ($thisallowed=~/R/) {
2968: my $rolecode=(split(/\./,$env{'request.role'}))[0];
2969: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
2970: &log($env{'user.domain'},$env{'user.name'},$env{'user.host'},
2971: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2972: return '';
2973: }
2974: }
2975:
2976: # Restricted by state or randomout?
2977:
2978: if ($thisallowed=~/X/) {
2979: if ($env{'acc.randomout'}) {
2980: if (!$symb) { $symb=&symbread($uri,1); }
2981: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
2982: return '';
2983: }
2984: }
2985: if (&condval($statecond)) {
2986: return '2';
2987: } else {
2988: return '';
2989: }
2990: }
2991:
2992: return 'F';
2993: }
2994:
2995: # --------------------------------------------------- Is a resource on the map?
2996:
2997: sub is_on_map {
2998: my $uri=&declutter(shift);
2999: $uri=~s/\.\d+\.(\w+)$/\.$1/;
3000: my @uriparts=split(/\//,$uri);
3001: my $filename=$uriparts[$#uriparts];
3002: my $pathname=$uri;
3003: $pathname=~s|/\Q$filename\E$||;
3004: $pathname=~s/^adm\/wrapper\///;
3005: #Trying to find the conditional for the file
3006: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3007: /\&\Q$filename\E\:([\d\|]+)\&/);
3008: if ($match) {
3009: return (1,$1);
3010: } else {
3011: return (0,0);
3012: }
3013: }
3014:
3015: # --------------------------------------------------------- Get symb from alias
3016:
3017: sub get_symb_from_alias {
3018: my $symb=shift;
3019: my ($map,$resid,$url)=&decode_symb($symb);
3020: # Already is a symb
3021: if ($url) { return $symb; }
3022: # Must be an alias
3023: my $aliassymb='';
3024: my %bighash;
3025: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
3026: &GDBM_READER(),0640)) {
3027: my $rid=$bighash{'mapalias_'.$symb};
3028: if ($rid) {
3029: my ($mapid,$resid)=split(/\./,$rid);
3030: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3031: $resid,$bighash{'src_'.$rid});
3032: }
3033: untie %bighash;
3034: }
3035: return $aliassymb;
3036: }
3037:
3038: # ----------------------------------------------------------------- Define Role
3039:
3040: sub definerole {
3041: if (allowed('mcr','/')) {
3042: my ($rolename,$sysrole,$domrole,$courole)=@_;
3043: foreach (split(':',$sysrole)) {
3044: my ($crole,$cqual)=split(/\&/,$_);
3045: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3046: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3047: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3048: return "refused:s:$crole&$cqual";
3049: }
3050: }
3051: }
3052: foreach (split(':',$domrole)) {
3053: my ($crole,$cqual)=split(/\&/,$_);
3054: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3055: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3056: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3057: return "refused:d:$crole&$cqual";
3058: }
3059: }
3060: }
3061: foreach (split(':',$courole)) {
3062: my ($crole,$cqual)=split(/\&/,$_);
3063: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3064: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3065: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3066: return "refused:c:$crole&$cqual";
3067: }
3068: }
3069: }
3070: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3071: "$env{'user.domain'}:$env{'user.name'}:".
3072: "rolesdef_$rolename=".
3073: escape($sysrole.'_'.$domrole.'_'.$courole);
3074: return reply($command,$env{'user.home'});
3075: } else {
3076: return 'refused';
3077: }
3078: }
3079:
3080: # ---------------- Make a metadata query against the network of library servers
3081:
3082: sub metadata_query {
3083: my ($query,$custom,$customshow,$server_array)=@_;
3084: my %rhash;
3085: my @server_list = (defined($server_array) ? @$server_array
3086: : keys(%libserv) );
3087: for my $server (@server_list) {
3088: unless ($custom or $customshow) {
3089: my $reply=&reply("querysend:".&escape($query),$server);
3090: $rhash{$server}=$reply;
3091: }
3092: else {
3093: my $reply=&reply("querysend:".&escape($query).':'.
3094: &escape($custom).':'.&escape($customshow),
3095: $server);
3096: $rhash{$server}=$reply;
3097: }
3098: }
3099: return \%rhash;
3100: }
3101:
3102: # ----------------------------------------- Send log queries and wait for reply
3103:
3104: sub log_query {
3105: my ($uname,$udom,$query,%filters)=@_;
3106: my $uhome=&homeserver($uname,$udom);
3107: if ($uhome eq 'no_host') { return 'error: no_host'; }
3108: my $uhost=$hostname{$uhome};
3109: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3110: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3111: $uhome);
3112: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3113: return get_query_reply($queryid);
3114: }
3115:
3116: # ------- Request retrieval of institutional classlists for course(s)
3117:
3118: sub fetch_enrollment_query {
3119: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3120: my $homeserver;
3121: my $maxtries = 1;
3122: if ($context eq 'automated') {
3123: $homeserver = $perlvar{'lonHostID'};
3124: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3125: } else {
3126: $homeserver = &homeserver($cnum,$dom);
3127: }
3128: my $host=$hostname{$homeserver};
3129: my $cmd = '';
3130: foreach (keys %{$affiliatesref}) {
3131: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3132: }
3133: $cmd =~ s/%%$//;
3134: $cmd = &escape($cmd);
3135: my $query = 'fetchenrollment';
3136: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
3137: unless ($queryid=~/^\Q$host\E\_/) {
3138: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3139: return 'error: '.$queryid;
3140: }
3141: my $reply = &get_query_reply($queryid);
3142: my $tries = 1;
3143: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3144: $reply = &get_query_reply($queryid);
3145: $tries ++;
3146: }
3147: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3148: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3149: } else {
3150: my @responses = split/:/,$reply;
3151: if ($homeserver eq $perlvar{'lonHostID'}) {
3152: foreach (@responses) {
3153: my ($key,$value) = split/=/,$_;
3154: $$replyref{$key} = $value;
3155: }
3156: } else {
3157: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3158: foreach (@responses) {
3159: my ($key,$value) = split/=/,$_;
3160: $$replyref{$key} = $value;
3161: if ($value > 0) {
3162: foreach (@{$$affiliatesref{$key}}) {
3163: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3164: my $destname = $pathname.'/'.$filename;
3165: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3166: if ($xml_classlist =~ /^error/) {
3167: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3168: } else {
3169: if ( open(FILE,">$destname") ) {
3170: print FILE &unescape($xml_classlist);
3171: close(FILE);
3172: } else {
3173: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3174: }
3175: }
3176: }
3177: }
3178: }
3179: }
3180: return 'ok';
3181: }
3182: return 'error';
3183: }
3184:
3185: sub get_query_reply {
3186: my $queryid=shift;
3187: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3188: my $reply='';
3189: for (1..100) {
3190: sleep 2;
3191: if (-e $replyfile.'.end') {
3192: if (open(my $fh,$replyfile)) {
3193: $reply.=<$fh>;
3194: close($fh);
3195: } else { return 'error: reply_file_error'; }
3196: return &unescape($reply);
3197: }
3198: }
3199: return 'timeout:'.$queryid;
3200: }
3201:
3202: sub courselog_query {
3203: #
3204: # possible filters:
3205: # url: url or symb
3206: # username
3207: # domain
3208: # action: view, submit, grade
3209: # start: timestamp
3210: # end: timestamp
3211: #
3212: my (%filters)=@_;
3213: unless ($env{'request.course.id'}) { return 'no_course'; }
3214: if ($filters{'url'}) {
3215: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3216: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3217: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3218: }
3219: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
3220: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
3221: return &log_query($cname,$cdom,'courselog',%filters);
3222: }
3223:
3224: sub userlog_query {
3225: my ($uname,$udom,%filters)=@_;
3226: return &log_query($uname,$udom,'userlog',%filters);
3227: }
3228:
3229: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3230:
3231: sub auto_run {
3232: my ($cnum,$cdom) = @_;
3233: my $homeserver = &homeserver($cnum,$cdom);
3234: my $response = &reply('autorun:'.$cdom,$homeserver);
3235: return $response;
3236: }
3237:
3238: sub auto_get_sections {
3239: my ($cnum,$cdom,$inst_coursecode) = @_;
3240: my $homeserver = &homeserver($cnum,$cdom);
3241: my @secs = ();
3242: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3243: unless ($response eq 'refused') {
3244: @secs = split/:/,$response;
3245: }
3246: return @secs;
3247: }
3248:
3249: sub auto_new_course {
3250: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3251: my $homeserver = &homeserver($cnum,$cdom);
3252: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3253: return $response;
3254: }
3255:
3256: sub auto_validate_courseID {
3257: my ($cnum,$cdom,$inst_course_id) = @_;
3258: my $homeserver = &homeserver($cnum,$cdom);
3259: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3260: return $response;
3261: }
3262:
3263: sub auto_create_password {
3264: my ($cnum,$cdom,$authparam) = @_;
3265: my $homeserver = &homeserver($cnum,$cdom);
3266: my $create_passwd = 0;
3267: my $authchk = '';
3268: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3269: if ($response eq 'refused') {
3270: $authchk = 'refused';
3271: } else {
3272: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3273: }
3274: return ($authparam,$create_passwd,$authchk);
3275: }
3276:
3277: sub auto_instcode_format {
3278: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3279: my $courses = '';
3280: my $homeserver;
3281: if ($caller eq 'global') {
3282: foreach my $tryserver (keys %libserv) {
3283: if ($hostdom{$tryserver} eq $codedom) {
3284: $homeserver = $tryserver;
3285: last;
3286: }
3287: }
3288: if (($env{'user.name'}) && ($env{'user.domain'} eq $codedom)) {
3289: $homeserver = &homeserver($env{'user.name'},$codedom);
3290: }
3291: } else {
3292: $homeserver = &homeserver($caller,$codedom);
3293: }
3294: foreach (keys %{$instcodes}) {
3295: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3296: }
3297: chop($courses);
3298: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3299: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3300: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3301: %{$codes} = &str2hash($codes_str);
3302: @{$codetitles} = &str2array($codetitles_str);
3303: %{$cat_titles} = &str2hash($cat_titles_str);
3304: %{$cat_order} = &str2hash($cat_order_str);
3305: return 'ok';
3306: }
3307: return $response;
3308: }
3309:
3310: # ------------------------------------------------------------------ Plain Text
3311:
3312: sub plaintext {
3313: my $short=shift;
3314: return &mt($prp{$short});
3315: }
3316:
3317: # ----------------------------------------------------------------- Assign Role
3318:
3319: sub assignrole {
3320: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3321: my $mrole;
3322: if ($role =~ /^cr\//) {
3323: my $cwosec=$url;
3324: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3325: unless (&allowed('ccr',$cwosec)) {
3326: &logthis('Refused custom assignrole: '.
3327: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3328: $env{'user.name'}.' at '.$env{'user.domain'});
3329: return 'refused';
3330: }
3331: $mrole='cr';
3332: } else {
3333: my $cwosec=$url;
3334: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3335: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3336: &logthis('Refused assignrole: '.
3337: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3338: $env{'user.name'}.' at '.$env{'user.domain'});
3339: return 'refused';
3340: }
3341: $mrole=$role;
3342: }
3343: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3344: "$udom:$uname:$url".'_'."$mrole=$role";
3345: if ($end) { $command.='_'.$end; }
3346: if ($start) {
3347: if ($end) {
3348: $command.='_'.$start;
3349: } else {
3350: $command.='_0_'.$start;
3351: }
3352: }
3353: # actually delete
3354: if ($deleteflag) {
3355: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3356: # modify command to delete the role
3357: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
3358: "$udom:$uname:$url".'_'."$mrole";
3359: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
3360: # set start and finish to negative values for userrolelog
3361: $start=-1;
3362: $end=-1;
3363: }
3364: }
3365: # send command
3366: my $answer=&reply($command,&homeserver($uname,$udom));
3367: # log new user role if status is ok
3368: if ($answer eq 'ok') {
3369: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
3370: }
3371: return $answer;
3372: }
3373:
3374: # -------------------------------------------------- Modify user authentication
3375: # Overrides without validation
3376:
3377: sub modifyuserauth {
3378: my ($udom,$uname,$umode,$upass)=@_;
3379: my $uhome=&homeserver($uname,$udom);
3380: unless (&allowed('mau',$udom)) { return 'refused'; }
3381: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3382: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
3383: ' in domain '.$env{'request.role.domain'});
3384: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3385: &escape($upass),$uhome);
3386: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
3387: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3388: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3389: &log($udom,,$uname,$uhome,
3390: 'Authentication changed by '.$env{'user.domain'}.', '.
3391: $env{'user.name'}.', '.$umode.
3392: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3393: unless ($reply eq 'ok') {
3394: &logthis('Authentication mode error: '.$reply);
3395: return 'error: '.$reply;
3396: }
3397: return 'ok';
3398: }
3399:
3400: # --------------------------------------------------------------- Modify a user
3401:
3402: sub modifyuser {
3403: my ($udom, $uname, $uid,
3404: $umode, $upass, $first,
3405: $middle, $last, $gene,
3406: $forceid, $desiredhome, $email)=@_;
3407: $udom=~s/\W//g;
3408: $uname=~s/\W//g;
3409: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3410: $umode.', '.$first.', '.$middle.', '.
3411: $last.', '.$gene.'(forceid: '.$forceid.')'.
3412: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3413: ' desiredhome not specified').
3414: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
3415: ' in domain '.$env{'request.role.domain'});
3416: my $uhome=&homeserver($uname,$udom,'true');
3417: # ----------------------------------------------------------------- Create User
3418: if (($uhome eq 'no_host') &&
3419: (($umode && $upass) || ($umode eq 'localauth'))) {
3420: my $unhome='';
3421: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3422: $unhome = $desiredhome;
3423: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
3424: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
3425: } else { # load balancing routine for determining $unhome
3426: my $tryserver;
3427: my $loadm=10000000;
3428: foreach $tryserver (keys %libserv) {
3429: if ($hostdom{$tryserver} eq $udom) {
3430: my $answer=reply('load',$tryserver);
3431: if (($answer=~/\d+/) && ($answer<$loadm)) {
3432: $loadm=$answer;
3433: $unhome=$tryserver;
3434: }
3435: }
3436: }
3437: }
3438: if (($unhome eq '') || ($unhome eq 'no_host')) {
3439: return 'error: unable to find a home server for '.$uname.
3440: ' in domain '.$udom;
3441: }
3442: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3443: &escape($upass),$unhome);
3444: unless ($reply eq 'ok') {
3445: return 'error: '.$reply;
3446: }
3447: $uhome=&homeserver($uname,$udom,'true');
3448: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3449: return 'error: unable verify users home machine.';
3450: }
3451: } # End of creation of new user
3452: # ---------------------------------------------------------------------- Add ID
3453: if ($uid) {
3454: $uid=~tr/A-Z/a-z/;
3455: my %uidhash=&idrget($udom,$uname);
3456: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3457: && (!$forceid)) {
3458: unless ($uid eq $uidhash{$uname}) {
3459: return 'error: user id "'.$uid.'" does not match '.
3460: 'current user id "'.$uidhash{$uname}.'".';
3461: }
3462: } else {
3463: &idput($udom,($uname => $uid));
3464: }
3465: }
3466: # -------------------------------------------------------------- Add names, etc
3467: my @tmp=&get('environment',
3468: ['firstname','middlename','lastname','generation'],
3469: $udom,$uname);
3470: my %names;
3471: if ($tmp[0] =~ m/^error:.*/) {
3472: %names=();
3473: } else {
3474: %names = @tmp;
3475: }
3476: #
3477: # Make sure to not trash student environment if instructor does not bother
3478: # to supply name and email information
3479: #
3480: if ($first) { $names{'firstname'} = $first; }
3481: if (defined($middle)) { $names{'middlename'} = $middle; }
3482: if ($last) { $names{'lastname'} = $last; }
3483: if (defined($gene)) { $names{'generation'} = $gene; }
3484: if ($email) {
3485: $email=~s/[^\w\@\.\-\,]//gs;
3486: if ($email=~/\@/) { $names{'notification'} = $email;
3487: $names{'critnotification'} = $email;
3488: $names{'permanentemail'} = $email; }
3489: }
3490: my $reply = &put('environment', \%names, $udom,$uname);
3491: if ($reply ne 'ok') { return 'error: '.$reply; }
3492: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
3493: $umode.', '.$first.', '.$middle.', '.
3494: $last.', '.$gene.' by '.
3495: $env{'user.name'}.' at '.$env{'user.domain'});
3496: return 'ok';
3497: }
3498:
3499: # -------------------------------------------------------------- Modify student
3500:
3501: sub modifystudent {
3502: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3503: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
3504: if (!$cid) {
3505: unless ($cid=$env{'request.course.id'}) {
3506: return 'not_in_class';
3507: }
3508: }
3509: # --------------------------------------------------------------- Make the user
3510: my $reply=&modifyuser
3511: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
3512: $desiredhome,$email);
3513: unless ($reply eq 'ok') { return $reply; }
3514: # This will cause &modify_student_enrollment to get the uid from the
3515: # students environment
3516: $uid = undef if (!$forceid);
3517: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
3518: $gene,$usec,$end,$start,$type,$locktype,$cid);
3519: return $reply;
3520: }
3521:
3522: sub modify_student_enrollment {
3523: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
3524: my ($cdom,$cnum,$chome);
3525: if (!$cid) {
3526: unless ($cid=$env{'request.course.id'}) {
3527: return 'not_in_class';
3528: }
3529: $cdom=$env{'course.'.$cid.'.domain'};
3530: $cnum=$env{'course.'.$cid.'.num'};
3531: } else {
3532: ($cdom,$cnum)=split(/_/,$cid);
3533: }
3534: $chome=$env{'course.'.$cid.'.home'};
3535: if (!$chome) {
3536: $chome=&homeserver($cnum,$cdom);
3537: }
3538: if (!$chome) { return 'unknown_course'; }
3539: # Make sure the user exists
3540: my $uhome=&homeserver($uname,$udom);
3541: if (($uhome eq '') || ($uhome eq 'no_host')) {
3542: return 'error: no such user';
3543: }
3544: # Get student data if we were not given enough information
3545: if (!defined($first) || $first eq '' ||
3546: !defined($last) || $last eq '' ||
3547: !defined($uid) || $uid eq '' ||
3548: !defined($middle) || $middle eq '' ||
3549: !defined($gene) || $gene eq '') {
3550: # They did not supply us with enough data to enroll the student, so
3551: # we need to pick up more information.
3552: my %tmp = &get('environment',
3553: ['firstname','middlename','lastname', 'generation','id']
3554: ,$udom,$uname);
3555:
3556: #foreach (keys(%tmp)) {
3557: # &logthis("key $_ = ".$tmp{$_});
3558: #}
3559: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3560: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3561: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3562: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3563: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3564: }
3565: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
3566: my $reply=cput('classlist',
3567: {"$uname:$udom" =>
3568: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
3569: $cdom,$cnum);
3570: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3571: return 'error: '.$reply;
3572: }
3573: # Add student role to user
3574: my $uurl='/'.$cid;
3575: $uurl=~s/\_/\//g;
3576: if ($usec) {
3577: $uurl.='/'.$usec;
3578: }
3579: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3580: }
3581:
3582: sub format_name {
3583: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
3584: my $name;
3585: if ($first ne 'lastname') {
3586: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
3587: } else {
3588: if ($lastname=~/\S/) {
3589: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
3590: $name=~s/\s+,/,/;
3591: } else {
3592: $name.= $firstname.' '.$middlename.' '.$generation;
3593: }
3594: }
3595: $name=~s/^\s+//;
3596: $name=~s/\s+$//;
3597: $name=~s/\s+/ /g;
3598: return $name;
3599: }
3600:
3601: # ------------------------------------------------- Write to course preferences
3602:
3603: sub writecoursepref {
3604: my ($courseid,%prefs)=@_;
3605: $courseid=~s/^\///;
3606: $courseid=~s/\_/\//g;
3607: my ($cdomain,$cnum)=split(/\//,$courseid);
3608: my $chome=homeserver($cnum,$cdomain);
3609: if (($chome eq '') || ($chome eq 'no_host')) {
3610: return 'error: no such course';
3611: }
3612: my $cstring='';
3613: foreach (keys %prefs) {
3614: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3615: }
3616: $cstring=~s/\&$//;
3617: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3618: }
3619:
3620: # ---------------------------------------------------------- Make/modify course
3621:
3622: sub createcourse {
3623: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_;
3624: $url=&declutter($url);
3625: my $cid='';
3626: unless (&allowed('ccc',$udom)) {
3627: return 'refused';
3628: }
3629: # ------------------------------------------------------------------- Create ID
3630: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3631: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3632: # ----------------------------------------------- Make sure that does not exist
3633: my $uhome=&homeserver($uname,$udom,'true');
3634: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3635: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3636: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3637: $uhome=&homeserver($uname,$udom,'true');
3638: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3639: return 'error: unable to generate unique course-ID';
3640: }
3641: }
3642: # ------------------------------------------------ Check supplied server name
3643: $course_server = $env{'user.homeserver'} if (! defined($course_server));
3644: if (! exists($libserv{$course_server})) {
3645: return 'error:bad server name '.$course_server;
3646: }
3647: # ------------------------------------------------------------- Make the course
3648: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3649: $course_server);
3650: unless ($reply eq 'ok') { return 'error: '.$reply; }
3651: $uhome=&homeserver($uname,$udom,'true');
3652: if (($uhome eq '') || ($uhome eq 'no_host')) {
3653: return 'error: no such course';
3654: }
3655: # ----------------------------------------------------------------- Course made
3656: # log existence
3657: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
3658: ':'.&escape($inst_code).':'.&escape($course_owner),$uhome);
3659: &flushcourselogs();
3660: # set toplevel url
3661: my $topurl=$url;
3662: unless ($nonstandard) {
3663: # ------------------------------------------ For standard courses, make top url
3664: my $mapurl=&clutter($url);
3665: if ($mapurl eq '/res/') { $mapurl=''; }
3666: $env{'form.initmap'}=(<<ENDINITMAP);
3667: <map>
3668: <resource id="1" type="start"></resource>
3669: <resource id="2" src="$mapurl"></resource>
3670: <resource id="3" type="finish"></resource>
3671: <link index="1" from="1" to="2"></link>
3672: <link index="2" from="2" to="3"></link>
3673: </map>
3674: ENDINITMAP
3675: $topurl=&declutter(
3676: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3677: );
3678: }
3679: # ----------------------------------------------------------- Write preferences
3680: &writecoursepref($udom.'_'.$uname,
3681: ('description' => $description,
3682: 'url' => $topurl));
3683: return '/'.$udom.'/'.$uname;
3684: }
3685:
3686: # ---------------------------------------------------------- Assign Custom Role
3687:
3688: sub assigncustomrole {
3689: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3690: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3691: $end,$start,$deleteflag);
3692: }
3693:
3694: # ----------------------------------------------------------------- Revoke Role
3695:
3696: sub revokerole {
3697: my ($udom,$uname,$url,$role,$deleteflag)=@_;
3698: my $now=time;
3699: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
3700: }
3701:
3702: # ---------------------------------------------------------- Revoke Custom Role
3703:
3704: sub revokecustomrole {
3705: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
3706: my $now=time;
3707: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3708: $deleteflag);
3709: }
3710:
3711: # ------------------------------------------------------------ Disk usage
3712: sub diskusage {
3713: my ($udom,$uname,$directoryRoot)=@_;
3714: $directoryRoot =~ s/\/$//;
3715: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
3716: return $listing;
3717: }
3718:
3719: sub is_locked {
3720: my ($file_name, $domain, $user) = @_;
3721: my @check;
3722: my $is_locked;
3723: push @check, $file_name;
3724: my %locked = &get('file_permissions',\@check,
3725: $env{'user.domain'},$env{'user.name'});
3726: my ($tmp)=keys(%locked);
3727: if ($tmp=~/^error:/) { undef(%locked); }
3728:
3729: if (ref($locked{$file_name}) eq 'ARRAY') {
3730: $is_locked = 'true';
3731: } else {
3732: $is_locked = 'false';
3733: }
3734: }
3735:
3736: # ------------------------------------------------------------- Mark as Read Only
3737:
3738: sub mark_as_readonly {
3739: my ($domain,$user,$files,$what) = @_;
3740: my %current_permissions = &dump('file_permissions',$domain,$user);
3741: my ($tmp)=keys(%current_permissions);
3742: if ($tmp=~/^error:/) { undef(%current_permissions); }
3743:
3744: foreach my $file (@{$files}) {
3745: push(@{$current_permissions{$file}},$what);
3746: }
3747: &put('file_permissions',\%current_permissions,$domain,$user);
3748: return;
3749: }
3750:
3751: # ------------------------------------------------------------Save Selected Files
3752:
3753: sub save_selected_files {
3754: my ($user, $path, @files) = @_;
3755: my $filename = $user."savedfiles";
3756: my @other_files = &files_not_in_path($user, $path);
3757: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3758: foreach my $file (@files) {
3759: print (OUT $env{'form.currentpath'}.$file."\n");
3760: }
3761: foreach my $file (@other_files) {
3762: print (OUT $file."\n");
3763: }
3764: close (OUT);
3765: return 'ok';
3766: }
3767:
3768: sub clear_selected_files {
3769: my ($user) = @_;
3770: my $filename = $user."savedfiles";
3771: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3772: print (OUT undef);
3773: close (OUT);
3774: return ("ok");
3775: }
3776:
3777: sub files_in_path {
3778: my ($user, $path) = @_;
3779: my $filename = $user."savedfiles";
3780: my %return_files;
3781: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3782: while (my $line_in = <IN>) {
3783: chomp ($line_in);
3784: my @paths_and_file = split (m!/!, $line_in);
3785: my $file_part = pop (@paths_and_file);
3786: my $path_part = join ('/', @paths_and_file);
3787: $path_part.='/';
3788: my $path_and_file = $path_part.$file_part;
3789: if ($path_part eq $path) {
3790: $return_files{$file_part}= 'selected';
3791: }
3792: }
3793: close (IN);
3794: return (\%return_files);
3795: }
3796:
3797: # called in portfolio select mode, to show files selected NOT in current directory
3798: sub files_not_in_path {
3799: my ($user, $path) = @_;
3800: my $filename = $user."savedfiles";
3801: my @return_files;
3802: my $path_part;
3803: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3804: while (<IN>) {
3805: #ok, I know it's clunky, but I want it to work
3806: my @paths_and_file = split m!/!, $_;
3807: my $file_part = pop (@paths_and_file);
3808: chomp ($file_part);
3809: my $path_part = join ('/', @paths_and_file);
3810: $path_part .= '/';
3811: my $path_and_file = $path_part.$file_part;
3812: if ($path_part ne $path) {
3813: push (@return_files, ($path_and_file));
3814: }
3815: }
3816: close (OUT);
3817: return (@return_files);
3818: }
3819:
3820: #--------------------------------------------------------------Get Marked as Read Only
3821:
3822: sub get_marked_as_readonly {
3823: my ($domain,$user,$what) = @_;
3824: my %current_permissions = &dump('file_permissions',$domain,$user);
3825: my ($tmp)=keys(%current_permissions);
3826: if ($tmp=~/^error:/) { undef(%current_permissions); }
3827:
3828: my @readonly_files;
3829: while (my ($file_name,$value) = each(%current_permissions)) {
3830: if (ref($value) eq "ARRAY"){
3831: foreach my $stored_what (@{$value}) {
3832: if ($stored_what eq $what) {
3833: push(@readonly_files, $file_name);
3834: } elsif (!defined($what)) {
3835: push(@readonly_files, $file_name);
3836: }
3837: }
3838: }
3839: }
3840: return @readonly_files;
3841: }
3842: #-----------------------------------------------------------Get Marked as Read Only Hash
3843:
3844: sub get_marked_as_readonly_hash {
3845: my ($domain,$user,$what) = @_;
3846: my %current_permissions = &dump('file_permissions',$domain,$user);
3847: my ($tmp)=keys(%current_permissions);
3848: if ($tmp=~/^error:/) { undef(%current_permissions); }
3849:
3850: my %readonly_files;
3851: while (my ($file_name,$value) = each(%current_permissions)) {
3852: if (ref($value) eq "ARRAY"){
3853: foreach my $stored_what (@{$value}) {
3854: if ($stored_what eq $what) {
3855: $readonly_files{$file_name} = 'locked';
3856: } elsif (!defined($what)) {
3857: $readonly_files{$file_name} = 'locked';
3858: }
3859: }
3860: }
3861: }
3862: return %readonly_files;
3863: }
3864: # ------------------------------------------------------------ Unmark as Read Only
3865:
3866: sub unmark_as_readonly {
3867: # unmarks all files locked by $what
3868: # for portfolio submissions, $what contains $crsid and $symb
3869: my ($domain,$user,$what) = @_;
3870: my %current_permissions = &dump('file_permissions',$domain,$user);
3871: my ($tmp)=keys(%current_permissions);
3872: if ($tmp=~/^error:/) { undef(%current_permissions); }
3873:
3874: my @readonly_files = &get_marked_as_readonly($domain,$user,$what);
3875: foreach my $file(@readonly_files){
3876: my $current_locks = $current_permissions{$file};
3877: my @new_locks;
3878: my @del_keys;
3879: if (ref($current_locks) eq "ARRAY"){
3880: foreach my $locker (@{$current_locks}) {
3881: unless ($locker eq $what) {
3882: push(@new_locks, $what);
3883: }
3884: }
3885: if (@new_locks > 0) {
3886: $current_permissions{$file} = \@new_locks;
3887: } else {
3888: push(@del_keys, $file);
3889: &del('file_permissions',\@del_keys, $domain, $user);
3890: delete $current_permissions{$file};
3891: }
3892: }
3893: }
3894: &put('file_permissions',\%current_permissions,$domain,$user);
3895: return;
3896: }
3897:
3898: # ------------------------------------------------------------ Directory lister
3899:
3900: sub dirlist {
3901: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3902:
3903: $uri=~s/^\///;
3904: $uri=~s/\/$//;
3905: my ($udom, $uname);
3906: (undef,$udom,$uname)=split(/\//,$uri);
3907: if(defined($userdomain)) {
3908: $udom = $userdomain;
3909: }
3910: if(defined($username)) {
3911: $uname = $username;
3912: }
3913:
3914: my $dirRoot = $perlvar{'lonDocRoot'};
3915: if(defined($alternateDirectoryRoot)) {
3916: $dirRoot = $alternateDirectoryRoot;
3917: $dirRoot =~ s/\/$//;
3918: }
3919:
3920: if($udom) {
3921: if($uname) {
3922: my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
3923: homeserver($uname,$udom));
3924: my @listing_results;
3925: if ($listing eq 'unknown_cmd') {
3926: $listing=reply('ls:'.$dirRoot.'/'.$uri,
3927: homeserver($uname,$udom));
3928: @listing_results = split(/:/,$listing);
3929: } else {
3930: @listing_results = map { &unescape($_); } split(/:/,$listing);
3931: }
3932: return @listing_results;
3933: } elsif(!defined($alternateDirectoryRoot)) {
3934: my $tryserver;
3935: my %allusers=();
3936: foreach $tryserver (keys %libserv) {
3937: if($hostdom{$tryserver} eq $udom) {
3938: my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
3939: $udom, $tryserver);
3940: my @listing_results;
3941: if ($listing eq 'unknown_cmd') {
3942: $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3943: $udom, $tryserver);
3944: @listing_results = split(/:/,$listing);
3945: } else {
3946: @listing_results =
3947: map { &unescape($_); } split(/:/,$listing);
3948: }
3949: if ($listing_results[0] ne 'no_such_dir' &&
3950: $listing_results[0] ne 'empty' &&
3951: $listing_results[0] ne 'con_lost') {
3952: foreach (@listing_results) {
3953: my ($entry,@stat)=split(/&/,$_);
3954: $allusers{$entry}=1;
3955: }
3956: }
3957: }
3958: }
3959: my $alluserstr='';
3960: foreach (sort keys %allusers) {
3961: $alluserstr.=$_.'&user:';
3962: }
3963: $alluserstr=~s/:$//;
3964: return split(/:/,$alluserstr);
3965: } else {
3966: my @emptyResults = ();
3967: push(@emptyResults, 'missing user name');
3968: return split(':',@emptyResults);
3969: }
3970: } elsif(!defined($alternateDirectoryRoot)) {
3971: my $tryserver;
3972: my %alldom=();
3973: foreach $tryserver (keys %libserv) {
3974: $alldom{$hostdom{$tryserver}}=1;
3975: }
3976: my $alldomstr='';
3977: foreach (sort keys %alldom) {
3978: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
3979: }
3980: $alldomstr=~s/:$//;
3981: return split(/:/,$alldomstr);
3982: } else {
3983: my @emptyResults = ();
3984: push(@emptyResults, 'missing domain');
3985: return split(':',@emptyResults);
3986: }
3987: }
3988:
3989: # --------------------------------------------- GetFileTimestamp
3990: # This function utilizes dirlist and returns the date stamp for
3991: # when it was last modified. It will also return an error of -1
3992: # if an error occurs
3993:
3994: ##
3995: ## FIXME: This subroutine assumes its caller knows something about the
3996: ## directory structure of the home server for the student ($root).
3997: ## Not a good assumption to make. Since this is for looking up files
3998: ## in user directories, the full path should be constructed by lond, not
3999: ## whatever machine we request data from.
4000: ##
4001: sub GetFileTimestamp {
4002: my ($studentDomain,$studentName,$filename,$root)=@_;
4003: $studentDomain=~s/\W//g;
4004: $studentName=~s/\W//g;
4005: my $subdir=$studentName.'__';
4006: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4007: my $proname="$studentDomain/$subdir/$studentName";
4008: $proname .= '/'.$filename;
4009: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
4010: $studentName, $root);
4011: my @stats = split('&', $fileStat);
4012: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4013: # @stats contains first the filename, then the stat output
4014: return $stats[10]; # so this is 10 instead of 9.
4015: } else {
4016: return -1;
4017: }
4018: }
4019:
4020: # -------------------------------------------------------- Value of a Condition
4021:
4022: sub directcondval {
4023: my $number=shift;
4024: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
4025: &Apache::lonuserstate::evalstate();
4026: }
4027: if ($env{'user.state.'.$env{'request.course.id'}}) {
4028: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
4029: } else {
4030: return 2;
4031: }
4032: }
4033:
4034: sub condval {
4035: my $condidx=shift;
4036: my $result=0;
4037: my $allpathcond='';
4038: foreach (split(/\|/,$condidx)) {
4039: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$_})) {
4040: $allpathcond.=
4041: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$_}.')|';
4042: }
4043: }
4044: $allpathcond=~s/\|$//;
4045: if ($env{'request.course.id'}) {
4046: if ($allpathcond) {
4047: my $operand='|';
4048: my @stack;
4049: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
4050: if ($_ eq '(') {
4051: push @stack,($operand,$result)
4052: } elsif ($_ eq ')') {
4053: my $before=pop @stack;
4054: if (pop @stack eq '&') {
4055: $result=$result>$before?$before:$result;
4056: } else {
4057: $result=$result>$before?$result:$before;
4058: }
4059: } elsif (($_ eq '&') || ($_ eq '|')) {
4060: $operand=$_;
4061: } else {
4062: my $new=directcondval($_);
4063: if ($operand eq '&') {
4064: $result=$result>$new?$new:$result;
4065: } else {
4066: $result=$result>$new?$result:$new;
4067: }
4068: }
4069: }
4070: }
4071: }
4072: return $result;
4073: }
4074:
4075: # ---------------------------------------------------- Devalidate courseresdata
4076:
4077: sub devalidatecourseresdata {
4078: my ($coursenum,$coursedomain)=@_;
4079: my $hashid=$coursenum.':'.$coursedomain;
4080: &devalidate_cache_new('courseres',$hashid);
4081: }
4082:
4083: # --------------------------------------------------- Course Resourcedata Query
4084:
4085: sub courseresdata {
4086: my ($coursenum,$coursedomain,@which)=@_;
4087: my $coursehom=&homeserver($coursenum,$coursedomain);
4088: my $hashid=$coursenum.':'.$coursedomain;
4089: my ($result,$cached)=&is_cached_new('courseres',$hashid);
4090: unless (defined($cached)) {
4091: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
4092: $result=\%dumpreply;
4093: my ($tmp) = keys(%dumpreply);
4094: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
4095: &do_cache_new('courseres',$hashid,$result,600);
4096: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4097: return $tmp;
4098: } elsif ($tmp =~ /^(error)/) {
4099: $result=undef;
4100: &do_cache_new('courseres',$hashid,$result,600);
4101: }
4102: }
4103: foreach my $item (@which) {
4104: if (defined($result->{$item})) {
4105: return $result->{$item};
4106: }
4107: }
4108: return undef;
4109: }
4110:
4111: #
4112: # EXT resource caching routines
4113: #
4114:
4115: sub clear_EXT_cache_status {
4116: &delenv('cache.EXT.');
4117: }
4118:
4119: sub EXT_cache_status {
4120: my ($target_domain,$target_user) = @_;
4121: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4122: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
4123: # We know already the user has no data
4124: return 1;
4125: } else {
4126: return 0;
4127: }
4128: }
4129:
4130: sub EXT_cache_set {
4131: my ($target_domain,$target_user) = @_;
4132: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4133: &appenv($cachename => time);
4134: }
4135:
4136: # --------------------------------------------------------- Value of a Variable
4137: sub EXT {
4138: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
4139:
4140: unless ($varname) { return ''; }
4141: #get real user name/domain, courseid and symb
4142: my $courseid;
4143: my $publicuser;
4144: if ($symbparm) {
4145: $symbparm=&get_symb_from_alias($symbparm);
4146: }
4147: if (!($uname && $udom)) {
4148: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
4149: &Apache::lonxml::whichuser($symbparm);
4150: if (!$symbparm) { $symbparm=$cursymb; }
4151: } else {
4152: $courseid=$env{'request.course.id'};
4153: }
4154: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
4155: my $rest;
4156: if (defined($therest[0])) {
4157: $rest=join('.',@therest);
4158: } else {
4159: $rest='';
4160: }
4161:
4162: my $qualifierrest=$qualifier;
4163: if ($rest) { $qualifierrest.='.'.$rest; }
4164: my $spacequalifierrest=$space;
4165: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
4166: if ($realm eq 'user') {
4167: # --------------------------------------------------------------- user.resource
4168: if ($space eq 'resource') {
4169: if (defined($Apache::lonhomework::parsing_a_problem) ||
4170: defined($Apache::lonhomework::parsing_a_task)) {
4171: return $Apache::lonhomework::history{$qualifierrest};
4172: } else {
4173: my %restored;
4174: if ($publicuser || $env{'request.state'} eq 'construct') {
4175: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
4176: } else {
4177: %restored=&restore($symbparm,$courseid,$udom,$uname);
4178: }
4179: return $restored{$qualifierrest};
4180: }
4181: # ----------------------------------------------------------------- user.access
4182: } elsif ($space eq 'access') {
4183: # FIXME - not supporting calls for a specific user
4184: return &allowed($qualifier,$rest);
4185: # ------------------------------------------ user.preferences, user.environment
4186: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
4187: if (($uname eq $env{'user.name'}) &&
4188: ($udom eq $env{'user.domain'})) {
4189: return $env{join('.',('environment',$qualifierrest))};
4190: } else {
4191: my %returnhash;
4192: if (!$publicuser) {
4193: %returnhash=&userenvironment($udom,$uname,
4194: $qualifierrest);
4195: }
4196: return $returnhash{$qualifierrest};
4197: }
4198: # ----------------------------------------------------------------- user.course
4199: } elsif ($space eq 'course') {
4200: # FIXME - not supporting calls for a specific user
4201: return $env{join('.',('request.course',$qualifier))};
4202: # ------------------------------------------------------------------- user.role
4203: } elsif ($space eq 'role') {
4204: # FIXME - not supporting calls for a specific user
4205: my ($role,$where)=split(/\./,$env{'request.role'});
4206: if ($qualifier eq 'value') {
4207: return $role;
4208: } elsif ($qualifier eq 'extent') {
4209: return $where;
4210: }
4211: # ----------------------------------------------------------------- user.domain
4212: } elsif ($space eq 'domain') {
4213: return $udom;
4214: # ------------------------------------------------------------------- user.name
4215: } elsif ($space eq 'name') {
4216: return $uname;
4217: # ---------------------------------------------------- Any other user namespace
4218: } else {
4219: my %reply;
4220: if (!$publicuser) {
4221: %reply=&get($space,[$qualifierrest],$udom,$uname);
4222: }
4223: return $reply{$qualifierrest};
4224: }
4225: } elsif ($realm eq 'query') {
4226: # ---------------------------------------------- pull stuff out of query string
4227: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
4228: [$spacequalifierrest]);
4229: return $env{'form.'.$spacequalifierrest};
4230: } elsif ($realm eq 'request') {
4231: # ------------------------------------------------------------- request.browser
4232: if ($space eq 'browser') {
4233: if ($qualifier eq 'textremote') {
4234: if (&mt('textual_remote_display') eq 'on') {
4235: return 1;
4236: } else {
4237: return 0;
4238: }
4239: } else {
4240: return $env{'browser.'.$qualifier};
4241: }
4242: # ------------------------------------------------------------ request.filename
4243: } else {
4244: return $env{'request.'.$spacequalifierrest};
4245: }
4246: } elsif ($realm eq 'course') {
4247: # ---------------------------------------------------------- course.description
4248: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
4249: } elsif ($realm eq 'resource') {
4250:
4251: my $section;
4252: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
4253: if (!$symbparm) { $symbparm=&symbread(); }
4254: }
4255: my ($courselevelm,$courselevel);
4256: if ($symbparm && defined($courseid) &&
4257: $courseid eq $env{'request.course.id'}) {
4258:
4259: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
4260:
4261: # ----------------------------------------------------- Cascading lookup scheme
4262: my $symbp=$symbparm;
4263: my $mapp=(&decode_symb($symbp))[0];
4264:
4265: my $symbparm=$symbp.'.'.$spacequalifierrest;
4266: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
4267:
4268: if (($env{'user.name'} eq $uname) &&
4269: ($env{'user.domain'} eq $udom)) {
4270: $section=$env{'request.course.sec'};
4271: } else {
4272: if (! defined($usection)) {
4273: $section=&getsection($udom,$uname,$courseid);
4274: } else {
4275: $section = $usection;
4276: }
4277: }
4278:
4279: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
4280: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
4281: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
4282:
4283: $courselevel=$courseid.'.'.$spacequalifierrest;
4284: my $courselevelr=$courseid.'.'.$symbparm;
4285: $courselevelm=$courseid.'.'.$mapparm;
4286:
4287: # ----------------------------------------------------------- first, check user
4288: #most student don\'t have any data set, check if there is some data
4289: if (! &EXT_cache_status($udom,$uname)) {
4290: my $hashid="$udom:$uname";
4291: my ($result,$cached)=&is_cached_new('userres',$hashid);
4292: if (!defined($cached)) {
4293: my %resourcedata=&dump('resourcedata',$udom,$uname);
4294: $result=\%resourcedata;
4295: &do_cache_new('userres',$hashid,$result);
4296: }
4297: my ($tmp)=keys(%$result);
4298: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4299: if ($$result{$courselevelr}) {
4300: return $$result{$courselevelr}; }
4301: if ($$result{$courselevelm}) {
4302: return $$result{$courselevelm}; }
4303: if ($$result{$courselevel}) {
4304: return $$result{$courselevel}; }
4305: } else {
4306: #error 2 occurs when the .db doesn't exist
4307: if ($tmp!~/error: 2 /) {
4308: &logthis("<font color=blue>WARNING:".
4309: " Trying to get resource data for ".
4310: $uname." at ".$udom.": ".
4311: $tmp."</font>");
4312: } elsif ($tmp=~/error: 2 /) {
4313: &EXT_cache_set($udom,$uname);
4314: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4315: return $tmp;
4316: }
4317: }
4318: }
4319:
4320: # ------------------------------------------------ second, check some of course
4321:
4322: my $coursereply=&courseresdata($env{'course.'.$courseid.'.num'},
4323: $env{'course.'.$courseid.'.domain'},
4324: ($seclevelr,$seclevelm,$seclevel,
4325: $courselevelr));
4326: if (defined($coursereply)) { return $coursereply; }
4327:
4328: # ------------------------------------------------------ third, check map parms
4329: my %parmhash=();
4330: my $thisparm='';
4331: if (tie(%parmhash,'GDBM_File',
4332: $env{'request.course.fn'}.'_parms.db',
4333: &GDBM_READER(),0640)) {
4334: $thisparm=$parmhash{$symbparm};
4335: untie(%parmhash);
4336: }
4337: if ($thisparm) { return $thisparm; }
4338: }
4339: # ------------------------------------------ fourth, look in resource metadata
4340:
4341: $spacequalifierrest=~s/\./\_/;
4342: my $filename;
4343: if (!$symbparm) { $symbparm=&symbread(); }
4344: if ($symbparm) {
4345: $filename=(&decode_symb($symbparm))[2];
4346: } else {
4347: $filename=$env{'request.filename'};
4348: }
4349: my $metadata=&metadata($filename,$spacequalifierrest);
4350: if (defined($metadata)) { return $metadata; }
4351: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
4352: if (defined($metadata)) { return $metadata; }
4353:
4354: # ---------------------------------------------- fourth, look in rest pf course
4355: if ($symbparm && defined($courseid) &&
4356: $courseid eq $env{'request.course.id'}) {
4357: my $coursereply=&courseresdata($env{'course.'.$courseid.'.num'},
4358: $env{'course.'.$courseid.'.domain'},
4359: ($courselevelm,$courselevel));
4360: if (defined($coursereply)) { return $coursereply; }
4361: }
4362: # ------------------------------------------------------------------ Cascade up
4363: unless ($space eq '0') {
4364: my @parts=split(/_/,$space);
4365: my $id=pop(@parts);
4366: my $part=join('_',@parts);
4367: if ($part eq '') { $part='0'; }
4368: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
4369: $symbparm,$udom,$uname,$section,1);
4370: if (defined($partgeneral)) { return $partgeneral; }
4371: }
4372: if ($recurse) { return undef; }
4373: my $pack_def=&packages_tab_default($filename,$varname);
4374: if (defined($pack_def)) { return $pack_def; }
4375:
4376: # ---------------------------------------------------- Any other user namespace
4377: } elsif ($realm eq 'environment') {
4378: # ----------------------------------------------------------------- environment
4379: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
4380: return $env{'environment.'.$spacequalifierrest};
4381: } else {
4382: my %returnhash=&userenvironment($udom,$uname,
4383: $spacequalifierrest);
4384: return $returnhash{$spacequalifierrest};
4385: }
4386: } elsif ($realm eq 'system') {
4387: # ----------------------------------------------------------------- system.time
4388: if ($space eq 'time') {
4389: return time;
4390: }
4391: }
4392: return '';
4393: }
4394:
4395: sub packages_tab_default {
4396: my ($uri,$varname)=@_;
4397: my (undef,$part,$name)=split(/\./,$varname);
4398: my $packages=&metadata($uri,'packages');
4399: foreach my $package (split(/,/,$packages)) {
4400: my ($pack_type,$pack_part)=split(/_/,$package,2);
4401: if (defined($packagetab{"$pack_type&$name&default"})) {
4402: return $packagetab{"$pack_type&$name&default"};
4403: }
4404: if ($pack_type eq 'part') { $pack_part='0'; }
4405: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
4406: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
4407: }
4408: }
4409: return undef;
4410: }
4411:
4412: sub add_prefix_and_part {
4413: my ($prefix,$part)=@_;
4414: my $keyroot;
4415: if (defined($prefix) && $prefix !~ /^__/) {
4416: # prefix that has a part already
4417: $keyroot=$prefix;
4418: } elsif (defined($prefix)) {
4419: # prefix that is missing a part
4420: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
4421: } else {
4422: # no prefix at all
4423: if (defined($part)) { $keyroot='_'.$part; }
4424: }
4425: return $keyroot;
4426: }
4427:
4428: # ---------------------------------------------------------------- Get metadata
4429:
4430: my %metaentry;
4431: sub metadata {
4432: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
4433: $uri=&declutter($uri);
4434: # if it is a non metadata possible uri return quickly
4435: if (($uri eq '') ||
4436: (($uri =~ m|^/*adm/|) &&
4437: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
4438: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
4439: ($uri =~ m|home/[^/]+/public_html/|)) {
4440: return undef;
4441: }
4442: my $filename=$uri;
4443: $uri=~s/\.meta$//;
4444: #
4445: # Is the metadata already cached?
4446: # Look at timestamp of caching
4447: # Everything is cached by the main uri, libraries are never directly cached
4448: #
4449: if (!defined($liburi)) {
4450: my ($result,$cached)=&is_cached_new('meta',$uri);
4451: if (defined($cached)) { return $result->{':'.$what}; }
4452: }
4453: {
4454: #
4455: # Is this a recursive call for a library?
4456: #
4457: # if (! exists($metacache{$uri})) {
4458: # $metacache{$uri}={};
4459: # }
4460: if ($liburi) {
4461: $liburi=&declutter($liburi);
4462: $filename=$liburi;
4463: } else {
4464: &devalidate_cache_new('meta',$uri);
4465: undef(%metaentry);
4466: }
4467: my %metathesekeys=();
4468: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
4469: my $metastring;
4470: if ($uri !~ m -^(uploaded|editupload)/-) {
4471: my $file=&filelocation('',&clutter($filename));
4472: #push(@{$metaentry{$uri.'.file'}},$file);
4473: $metastring=&getfile($file);
4474: }
4475: my $parser=HTML::LCParser->new(\$metastring);
4476: my $token;
4477: undef %metathesekeys;
4478: while ($token=$parser->get_token) {
4479: if ($token->[0] eq 'S') {
4480: if (defined($token->[2]->{'package'})) {
4481: #
4482: # This is a package - get package info
4483: #
4484: my $package=$token->[2]->{'package'};
4485: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4486: if (defined($token->[2]->{'id'})) {
4487: $keyroot.='_'.$token->[2]->{'id'};
4488: }
4489: if ($metaentry{':packages'}) {
4490: $metaentry{':packages'}.=','.$package.$keyroot;
4491: } else {
4492: $metaentry{':packages'}=$package.$keyroot;
4493: }
4494: foreach (sort keys %packagetab) {
4495: my $part=$keyroot;
4496: $part=~s/^\_//;
4497: if ($_=~/^\Q$package\E\&/ ||
4498: $_=~/^\Q$package\E_0\&/) {
4499: my ($pack,$name,$subp)=split(/\&/,$_);
4500: # ignore package.tab specified default values
4501: # here &package_tab_default() will fetch those
4502: if ($subp eq 'default') { next; }
4503: my $value=$packagetab{$_};
4504: my $unikey;
4505: if ($pack =~ /_0$/) {
4506: $unikey='parameter_0_'.$name;
4507: $part=0;
4508: } else {
4509: $unikey='parameter'.$keyroot.'_'.$name;
4510: }
4511: if ($subp eq 'display') {
4512: $value.=' [Part: '.$part.']';
4513: }
4514: $metaentry{':'.$unikey.'.part'}=$part;
4515: $metathesekeys{$unikey}=1;
4516: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
4517: $metaentry{':'.$unikey.'.'.$subp}=$value;
4518: }
4519: if (defined($metaentry{':'.$unikey.'.default'})) {
4520: $metaentry{':'.$unikey}=
4521: $metaentry{':'.$unikey.'.default'};
4522: }
4523: }
4524: }
4525: } else {
4526: #
4527: # This is not a package - some other kind of start tag
4528: #
4529: my $entry=$token->[1];
4530: my $unikey;
4531: if ($entry eq 'import') {
4532: $unikey='';
4533: } else {
4534: $unikey=$entry;
4535: }
4536: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4537:
4538: if (defined($token->[2]->{'id'})) {
4539: $unikey.='_'.$token->[2]->{'id'};
4540: }
4541:
4542: if ($entry eq 'import') {
4543: #
4544: # Importing a library here
4545: #
4546: if ($depthcount<20) {
4547: my $location=$parser->get_text('/import');
4548: my $dir=$filename;
4549: $dir=~s|[^/]*$||;
4550: $location=&filelocation($dir,$location);
4551: foreach (sort(split(/\,/,&metadata($uri,'keys',
4552: $location,$unikey,
4553: $depthcount+1)))) {
4554: $metaentry{':'.$_}=$metaentry{':'.$_};
4555: $metathesekeys{$_}=1;
4556: }
4557: }
4558: } else {
4559:
4560: if (defined($token->[2]->{'name'})) {
4561: $unikey.='_'.$token->[2]->{'name'};
4562: }
4563: $metathesekeys{$unikey}=1;
4564: foreach (@{$token->[3]}) {
4565: $metaentry{':'.$unikey.'.'.$_}=$token->[2]->{$_};
4566: }
4567: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
4568: my $default=$metaentry{':'.$unikey.'.default'};
4569: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
4570: # only ws inside the tag, and not in default, so use default
4571: # as value
4572: $metaentry{':'.$unikey}=$default;
4573: } else {
4574: # either something interesting inside the tag or default
4575: # uninteresting
4576: $metaentry{':'.$unikey}=$internaltext;
4577: }
4578: # end of not-a-package not-a-library import
4579: }
4580: # end of not-a-package start tag
4581: }
4582: # the next is the end of "start tag"
4583: }
4584: }
4585: my ($extension) = ($uri =~ /\.(\w+)$/);
4586: foreach my $key (sort(keys(%packagetab))) {
4587: #&logthis("extsion1 $extension $key !!");
4588: #no specific packages #how's our extension
4589: if ($key!~/^extension_\Q$extension\E&/) { next; }
4590: &metadata_create_package_def($uri,$key,'extension_'.$extension,
4591: \%metathesekeys);
4592: }
4593: if (!exists($metaentry{':packages'})) {
4594: foreach my $key (sort(keys(%packagetab))) {
4595: #no specific packages well let's get default then
4596: if ($key!~/^default&/) { next; }
4597: &metadata_create_package_def($uri,$key,'default',
4598: \%metathesekeys);
4599: }
4600: }
4601: # are there custom rights to evaluate
4602: if ($metaentry{':copyright'} eq 'custom') {
4603:
4604: #
4605: # Importing a rights file here
4606: #
4607: unless ($depthcount) {
4608: my $location=$metaentry{':customdistributionfile'};
4609: my $dir=$filename;
4610: $dir=~s|[^/]*$||;
4611: $location=&filelocation($dir,$location);
4612: foreach (sort(split(/\,/,&metadata($uri,'keys',
4613: $location,'_rights',
4614: $depthcount+1)))) {
4615: #$metaentry{':'.$_}=$metacache{$uri}->{':'.$_};
4616: $metathesekeys{$_}=1;
4617: }
4618: }
4619: }
4620: $metaentry{':keys'}=join(',',keys %metathesekeys);
4621: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
4622: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
4623: &do_cache_new('meta',$uri,\%metaentry);
4624: # this is the end of "was not already recently cached
4625: }
4626: return $metaentry{':'.$what};
4627: }
4628:
4629: sub metadata_create_package_def {
4630: my ($uri,$key,$package,$metathesekeys)=@_;
4631: my ($pack,$name,$subp)=split(/\&/,$key);
4632: if ($subp eq 'default') { next; }
4633:
4634: if (defined($metaentry{':packages'})) {
4635: $metaentry{':packages'}.=','.$package;
4636: } else {
4637: $metaentry{':packages'}=$package;
4638: }
4639: my $value=$packagetab{$key};
4640: my $unikey;
4641: $unikey='parameter_0_'.$name;
4642: $metaentry{':'.$unikey.'.part'}=0;
4643: $$metathesekeys{$unikey}=1;
4644: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
4645: $metaentry{':'.$unikey.'.'.$subp}=$value;
4646: }
4647: if (defined($metaentry{':'.$unikey.'.default'})) {
4648: $metaentry{':'.$unikey}=
4649: $metaentry{':'.$unikey.'.default'};
4650: }
4651: }
4652:
4653: sub metadata_generate_part0 {
4654: my ($metadata,$metacache,$uri) = @_;
4655: my %allnames;
4656: foreach my $metakey (sort keys %$metadata) {
4657: if ($metakey=~/^parameter\_(.*)/) {
4658: my $part=$$metacache{':'.$metakey.'.part'};
4659: my $name=$$metacache{':'.$metakey.'.name'};
4660: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
4661: $allnames{$name}=$part;
4662: }
4663: }
4664: }
4665: foreach my $name (keys(%allnames)) {
4666: $$metadata{"parameter_0_$name"}=1;
4667: my $key=":parameter_0_$name";
4668: $$metacache{"$key.part"}='0';
4669: $$metacache{"$key.name"}=$name;
4670: $$metacache{"$key.type"}=$$metacache{':parameter_'.
4671: $allnames{$name}.'_'.$name.
4672: '.type'};
4673: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
4674: '.display'};
4675: my $expr='\\[Part: '.$allnames{$name}.'\\]';
4676: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
4677: $$metacache{"$key.display"}=$olddis;
4678: }
4679: }
4680:
4681: # ------------------------------------------------- Get the title of a resource
4682:
4683: sub gettitle {
4684: my $urlsymb=shift;
4685: my $symb=&symbread($urlsymb);
4686: if ($symb) {
4687: my $key=$env{'request.course.id'}."\0".$symb;
4688: my ($result,$cached)=&is_cached_new('title',$key);
4689: if (defined($cached)) {
4690: return $result;
4691: }
4692: my ($map,$resid,$url)=&decode_symb($symb);
4693: my $title='';
4694: my %bighash;
4695: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4696: &GDBM_READER(),0640)) {
4697: my $mapid=$bighash{'map_pc_'.&clutter($map)};
4698: $title=$bighash{'title_'.$mapid.'.'.$resid};
4699: untie %bighash;
4700: }
4701: $title=~s/\&colon\;/\:/gs;
4702: if ($title) {
4703: return &do_cache_new('title',$key,$title,600);
4704: }
4705: $urlsymb=$url;
4706: }
4707: my $title=&metadata($urlsymb,'title');
4708: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
4709: return $title;
4710: }
4711:
4712: sub get_slot {
4713: my ($which,$cnum,$cdom)=@_;
4714: if (!$cnum || !$cdom) {
4715: (undef,my $courseid)=&Apache::lonxml::whichuser();
4716: $cdom=$env{'course.'.$courseid.'.domain'};
4717: $cnum=$env{'course.'.$courseid.'.num'};
4718: }
4719: my %slotinfo=&get('slots',[$which],$cdom,$cnum);
4720: &Apache::lonhomework::showhash(%slotinfo);
4721: my ($tmp)=keys(%slotinfo);
4722: if ($tmp=~/^error:/) { return (); }
4723: if (ref($slotinfo{$which}) eq 'HASH') {
4724: return %{$slotinfo{$which}};
4725: }
4726: return $slotinfo{$which};
4727: }
4728: # ------------------------------------------------- Update symbolic store links
4729:
4730: sub symblist {
4731: my ($mapname,%newhash)=@_;
4732: $mapname=&deversion(&declutter($mapname));
4733: my %hash;
4734: if (($env{'request.course.fn'}) && (%newhash)) {
4735: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
4736: &GDBM_WRCREAT(),0640)) {
4737: foreach (keys %newhash) {
4738: $hash{declutter($_)}=&encode_symb($mapname,$newhash{$_}->[1],
4739: $newhash{$_}->[0]);
4740: }
4741: if (untie(%hash)) {
4742: return 'ok';
4743: }
4744: }
4745: }
4746: return 'error';
4747: }
4748:
4749: # --------------------------------------------------------------- Verify a symb
4750:
4751: sub symbverify {
4752: my ($symb,$thisurl)=@_;
4753: my $thisfn=$thisurl;
4754: # wrapper not part of symbs
4755: $thisfn=~s/^\/adm\/wrapper//;
4756: $thisfn=&declutter($thisfn);
4757: # direct jump to resource in page or to a sequence - will construct own symbs
4758: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
4759: # check URL part
4760: my ($map,$resid,$url)=&decode_symb($symb);
4761:
4762: unless ($url eq $thisfn) { return 0; }
4763:
4764: $symb=&symbclean($symb);
4765: $thisurl=&deversion($thisurl);
4766: $thisfn=&deversion($thisfn);
4767:
4768: my %bighash;
4769: my $okay=0;
4770:
4771: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4772: &GDBM_READER(),0640)) {
4773: my $ids=$bighash{'ids_'.&clutter($thisurl)};
4774: unless ($ids) {
4775: $ids=$bighash{'ids_/'.$thisurl};
4776: }
4777: if ($ids) {
4778: # ------------------------------------------------------------------- Has ID(s)
4779: foreach (split(/\,/,$ids)) {
4780: my ($mapid,$resid)=split(/\./,$_);
4781: if (
4782: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
4783: eq $symb) {
4784: if (($env{'request.role.adv'}) ||
4785: $bighash{'encrypted_'.$_} eq $env{'request.enc'}) {
4786: $okay=1;
4787: }
4788: }
4789: }
4790: }
4791: untie(%bighash);
4792: }
4793: return $okay;
4794: }
4795:
4796: # --------------------------------------------------------------- Clean-up symb
4797:
4798: sub symbclean {
4799: my $symb=shift;
4800: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
4801: # remove version from map
4802: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
4803:
4804: # remove version from URL
4805: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
4806:
4807: # remove wrapper
4808:
4809: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
4810: return $symb;
4811: }
4812:
4813: # ---------------------------------------------- Split symb to find map and url
4814:
4815: sub encode_symb {
4816: my ($map,$resid,$url)=@_;
4817: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
4818: }
4819:
4820: sub decode_symb {
4821: my $symb=shift;
4822: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
4823: my ($map,$resid,$url)=split(/___/,$symb);
4824: return (&fixversion($map),$resid,&fixversion($url));
4825: }
4826:
4827: sub fixversion {
4828: my $fn=shift;
4829: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
4830: my %bighash;
4831: my $uri=&clutter($fn);
4832: my $key=$env{'request.course.id'}.'_'.$uri;
4833: # is this cached?
4834: my ($result,$cached)=&is_cached_new('courseresversion',$key);
4835: if (defined($cached)) { return $result; }
4836: # unfortunately not cached, or expired
4837: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4838: &GDBM_READER(),0640)) {
4839: if ($bighash{'version_'.$uri}) {
4840: my $version=$bighash{'version_'.$uri};
4841: unless (($version eq 'mostrecent') ||
4842: ($version==&getversion($uri))) {
4843: $uri=~s/\.(\w+)$/\.$version\.$1/;
4844: }
4845: }
4846: untie %bighash;
4847: }
4848: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
4849: }
4850:
4851: sub deversion {
4852: my $url=shift;
4853: $url=~s/\.\d+\.(\w+)$/\.$1/;
4854: return $url;
4855: }
4856:
4857: # ------------------------------------------------------ Return symb list entry
4858:
4859: sub symbread {
4860: my ($thisfn,$donotrecurse)=@_;
4861: my $cache_str='request.symbread.cached.'.$thisfn;
4862: if (defined($env{$cache_str})) { return $env{$cache_str}; }
4863: # no filename provided? try from environment
4864: unless ($thisfn) {
4865: if ($env{'request.symb'}) {
4866: return $env{$cache_str}=&symbclean($env{'request.symb'});
4867: }
4868: $thisfn=$env{'request.filename'};
4869: }
4870: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
4871: # is that filename actually a symb? Verify, clean, and return
4872: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
4873: if (&symbverify($thisfn,$1)) {
4874: return $env{$cache_str}=&symbclean($thisfn);
4875: }
4876: }
4877: $thisfn=declutter($thisfn);
4878: my %hash;
4879: my %bighash;
4880: my $syval='';
4881: if (($env{'request.course.fn'}) && ($thisfn)) {
4882: my $targetfn = $thisfn;
4883: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
4884: $targetfn = 'adm/wrapper/'.$thisfn;
4885: }
4886: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
4887: &GDBM_READER(),0640)) {
4888: $syval=$hash{$targetfn};
4889: untie(%hash);
4890: }
4891: # ---------------------------------------------------------- There was an entry
4892: if ($syval) {
4893: #unless ($syval=~/\_\d+$/) {
4894: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
4895: #&appenv('request.ambiguous' => $thisfn);
4896: #return $env{$cache_str}='';
4897: #}
4898: #$syval.=$1;
4899: #}
4900: } else {
4901: # ------------------------------------------------------- Was not in symb table
4902: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4903: &GDBM_READER(),0640)) {
4904: # ---------------------------------------------- Get ID(s) for current resource
4905: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4906: unless ($ids) {
4907: $ids=$bighash{'ids_/'.$thisfn};
4908: }
4909: unless ($ids) {
4910: # alias?
4911: $ids=$bighash{'mapalias_'.$thisfn};
4912: }
4913: if ($ids) {
4914: # ------------------------------------------------------------------- Has ID(s)
4915: my @possibilities=split(/\,/,$ids);
4916: if ($#possibilities==0) {
4917: # ----------------------------------------------- There is only one possibility
4918: my ($mapid,$resid)=split(/\./,$ids);
4919: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
4920: } elsif (!$donotrecurse) {
4921: # ------------------------------------------ There is more than one possibility
4922: my $realpossible=0;
4923: foreach (@possibilities) {
4924: my $file=$bighash{'src_'.$_};
4925: if (&allowed('bre',$file)) {
4926: my ($mapid,$resid)=split(/\./,$_);
4927: if ($bighash{'map_type_'.$mapid} ne 'page') {
4928: $realpossible++;
4929: $syval=declutter($bighash{'map_id_'.$mapid}).
4930: '___'.$resid;
4931: }
4932: }
4933: }
4934: if ($realpossible!=1) { $syval=''; }
4935: } else {
4936: $syval='';
4937: }
4938: }
4939: untie(%bighash)
4940: }
4941: }
4942: if ($syval) {
4943: return $env{$cache_str}=$syval;
4944: #return $env{$cache_str}=&symbclean($syval.'___'.$thisfn);
4945: }
4946: }
4947: &appenv('request.ambiguous' => $thisfn);
4948: return $env{$cache_str}='';
4949: }
4950:
4951: # ---------------------------------------------------------- Return random seed
4952:
4953: sub numval {
4954: my $txt=shift;
4955: $txt=~tr/A-J/0-9/;
4956: $txt=~tr/a-j/0-9/;
4957: $txt=~tr/K-T/0-9/;
4958: $txt=~tr/k-t/0-9/;
4959: $txt=~tr/U-Z/0-5/;
4960: $txt=~tr/u-z/0-5/;
4961: $txt=~s/\D//g;
4962: if ($_64bit) { if ($txt > 2**32) { return -1; } }
4963: return int($txt);
4964: }
4965:
4966: sub numval2 {
4967: my $txt=shift;
4968: $txt=~tr/A-J/0-9/;
4969: $txt=~tr/a-j/0-9/;
4970: $txt=~tr/K-T/0-9/;
4971: $txt=~tr/k-t/0-9/;
4972: $txt=~tr/U-Z/0-5/;
4973: $txt=~tr/u-z/0-5/;
4974: $txt=~s/\D//g;
4975: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
4976: my $total;
4977: foreach my $val (@txts) { $total+=$val; }
4978: if ($_64bit) { if ($total > 2**32) { return -1; } }
4979: return int($total);
4980: }
4981:
4982: sub numval3 {
4983: use integer;
4984: my $txt=shift;
4985: $txt=~tr/A-J/0-9/;
4986: $txt=~tr/a-j/0-9/;
4987: $txt=~tr/K-T/0-9/;
4988: $txt=~tr/k-t/0-9/;
4989: $txt=~tr/U-Z/0-5/;
4990: $txt=~tr/u-z/0-5/;
4991: $txt=~s/\D//g;
4992: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
4993: my $total;
4994: foreach my $val (@txts) { $total+=$val; }
4995: if ($_64bit) { $total=(($total<<32)>>32); }
4996: return $total;
4997: }
4998:
4999: sub latest_rnd_algorithm_id {
5000: return '64bit4';
5001: }
5002:
5003: sub get_rand_alg {
5004: my ($courseid)=@_;
5005: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
5006: if ($courseid) {
5007: return $env{"course.$courseid.rndseed"};
5008: }
5009: return &latest_rnd_algorithm_id();
5010: }
5011:
5012: sub validCODE {
5013: my ($CODE)=@_;
5014: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
5015: return 0;
5016: }
5017:
5018: sub getCODE {
5019: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
5020: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
5021: defined($Apache::lonhomework::parsing_a_task) ) &&
5022: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
5023: return $Apache::lonhomework::history{'resource.CODE'};
5024: }
5025: return undef;
5026: }
5027:
5028: sub rndseed {
5029: my ($symb,$courseid,$domain,$username)=@_;
5030:
5031: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
5032: if (!$symb) {
5033: unless ($symb=$wsymb) { return time; }
5034: }
5035: if (!$courseid) { $courseid=$wcourseid; }
5036: if (!$domain) { $domain=$wdomain; }
5037: if (!$username) { $username=$wusername }
5038: my $which=&get_rand_alg();
5039: if (defined(&getCODE())) {
5040: if ($which eq '64bit4') {
5041: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
5042: } else {
5043: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
5044: }
5045: } elsif ($which eq '64bit4') {
5046: return &rndseed_64bit4($symb,$courseid,$domain,$username);
5047: } elsif ($which eq '64bit3') {
5048: return &rndseed_64bit3($symb,$courseid,$domain,$username);
5049: } elsif ($which eq '64bit2') {
5050: return &rndseed_64bit2($symb,$courseid,$domain,$username);
5051: } elsif ($which eq '64bit') {
5052: return &rndseed_64bit($symb,$courseid,$domain,$username);
5053: }
5054: return &rndseed_32bit($symb,$courseid,$domain,$username);
5055: }
5056:
5057: sub rndseed_32bit {
5058: my ($symb,$courseid,$domain,$username)=@_;
5059: {
5060: use integer;
5061: my $symbchck=unpack("%32C*",$symb) << 27;
5062: my $symbseed=numval($symb) << 22;
5063: my $namechck=unpack("%32C*",$username) << 17;
5064: my $nameseed=numval($username) << 12;
5065: my $domainseed=unpack("%32C*",$domain) << 7;
5066: my $courseseed=unpack("%32C*",$courseid);
5067: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
5068: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5069: #&Apache::lonxml::debug("rndseed :$num:$symb");
5070: if ($_64bit) { $num=(($num<<32)>>32); }
5071: return $num;
5072: }
5073: }
5074:
5075: sub rndseed_64bit {
5076: my ($symb,$courseid,$domain,$username)=@_;
5077: {
5078: use integer;
5079: my $symbchck=unpack("%32S*",$symb) << 21;
5080: my $symbseed=numval($symb) << 10;
5081: my $namechck=unpack("%32S*",$username);
5082:
5083: my $nameseed=numval($username) << 21;
5084: my $domainseed=unpack("%32S*",$domain) << 10;
5085: my $courseseed=unpack("%32S*",$courseid);
5086:
5087: my $num1=$symbchck+$symbseed+$namechck;
5088: my $num2=$nameseed+$domainseed+$courseseed;
5089: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5090: #&Apache::lonxml::debug("rndseed :$num:$symb");
5091: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5092: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5093: return "$num1,$num2";
5094: }
5095: }
5096:
5097: sub rndseed_64bit2 {
5098: my ($symb,$courseid,$domain,$username)=@_;
5099: {
5100: use integer;
5101: # strings need to be an even # of cahracters long, it it is odd the
5102: # last characters gets thrown away
5103: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5104: my $symbseed=numval($symb) << 10;
5105: my $namechck=unpack("%32S*",$username.' ');
5106:
5107: my $nameseed=numval($username) << 21;
5108: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5109: my $courseseed=unpack("%32S*",$courseid.' ');
5110:
5111: my $num1=$symbchck+$symbseed+$namechck;
5112: my $num2=$nameseed+$domainseed+$courseseed;
5113: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5114: #&Apache::lonxml::debug("rndseed :$num:$symb");
5115: return "$num1,$num2";
5116: }
5117: }
5118:
5119: sub rndseed_64bit3 {
5120: my ($symb,$courseid,$domain,$username)=@_;
5121: {
5122: use integer;
5123: # strings need to be an even # of cahracters long, it it is odd the
5124: # last characters gets thrown away
5125: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5126: my $symbseed=numval2($symb) << 10;
5127: my $namechck=unpack("%32S*",$username.' ');
5128:
5129: my $nameseed=numval2($username) << 21;
5130: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5131: my $courseseed=unpack("%32S*",$courseid.' ');
5132:
5133: my $num1=$symbchck+$symbseed+$namechck;
5134: my $num2=$nameseed+$domainseed+$courseseed;
5135: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5136: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5137: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5138:
5139: return "$num1:$num2";
5140: }
5141: }
5142:
5143: sub rndseed_64bit4 {
5144: my ($symb,$courseid,$domain,$username)=@_;
5145: {
5146: use integer;
5147: # strings need to be an even # of cahracters long, it it is odd the
5148: # last characters gets thrown away
5149: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5150: my $symbseed=numval3($symb) << 10;
5151: my $namechck=unpack("%32S*",$username.' ');
5152:
5153: my $nameseed=numval3($username) << 21;
5154: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5155: my $courseseed=unpack("%32S*",$courseid.' ');
5156:
5157: my $num1=$symbchck+$symbseed+$namechck;
5158: my $num2=$nameseed+$domainseed+$courseseed;
5159: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5160: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5161: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5162:
5163: return "$num1:$num2";
5164: }
5165: }
5166:
5167: sub rndseed_CODE_64bit {
5168: my ($symb,$courseid,$domain,$username)=@_;
5169: {
5170: use integer;
5171: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5172: my $symbseed=numval2($symb);
5173: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5174: my $CODEseed=numval(&getCODE());
5175: my $courseseed=unpack("%32S*",$courseid.' ');
5176: my $num1=$symbseed+$CODEchck;
5177: my $num2=$CODEseed+$courseseed+$symbchck;
5178: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5179: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5180: if ($_64bit) { $num1=(($num1<<32)>>32); }
5181: if ($_64bit) { $num2=(($num2<<32)>>32); }
5182: return "$num1:$num2";
5183: }
5184: }
5185:
5186: sub rndseed_CODE_64bit4 {
5187: my ($symb,$courseid,$domain,$username)=@_;
5188: {
5189: use integer;
5190: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5191: my $symbseed=numval3($symb);
5192: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5193: my $CODEseed=numval3(&getCODE());
5194: my $courseseed=unpack("%32S*",$courseid.' ');
5195: my $num1=$symbseed+$CODEchck;
5196: my $num2=$CODEseed+$courseseed+$symbchck;
5197: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5198: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5199: if ($_64bit) { $num1=(($num1<<32)>>32); }
5200: if ($_64bit) { $num2=(($num2<<32)>>32); }
5201: return "$num1:$num2";
5202: }
5203: }
5204:
5205: sub setup_random_from_rndseed {
5206: my ($rndseed)=@_;
5207: if ($rndseed =~/([,:])/) {
5208: my ($num1,$num2)=split(/[,:]/,$rndseed);
5209: &Math::Random::random_set_seed(abs($num1),abs($num2));
5210: } else {
5211: &Math::Random::random_set_seed_from_phrase($rndseed);
5212: }
5213: }
5214:
5215: sub latest_receipt_algorithm_id {
5216: return 'receipt2';
5217: }
5218:
5219: sub recunique {
5220: my $fucourseid=shift;
5221: my $unique;
5222: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5223: $unique=$env{"course.$fucourseid.internal.encseed"};
5224: } else {
5225: $unique=$perlvar{'lonReceipt'};
5226: }
5227: return unpack("%32C*",$unique);
5228: }
5229:
5230: sub recprefix {
5231: my $fucourseid=shift;
5232: my $prefix;
5233: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5234: $prefix=$env{"course.$fucourseid.internal.encpref"};
5235: } else {
5236: $prefix=$perlvar{'lonHostID'};
5237: }
5238: return unpack("%32C*",$prefix);
5239: }
5240:
5241: sub ireceipt {
5242: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
5243: my $cuname=unpack("%32C*",$funame);
5244: my $cudom=unpack("%32C*",$fudom);
5245: my $cucourseid=unpack("%32C*",$fucourseid);
5246: my $cusymb=unpack("%32C*",$fusymb);
5247: my $cunique=&recunique($fucourseid);
5248: my $cpart=unpack("%32S*",$part);
5249: my $return =&recprefix($fucourseid).'-';
5250: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
5251: $env{'request.state'} eq 'construct') {
5252: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
5253: " and ".($cpart%$cudom));
5254:
5255: $return.= ($cunique%$cuname+
5256: $cunique%$cudom+
5257: $cusymb%$cuname+
5258: $cusymb%$cudom+
5259: $cucourseid%$cuname+
5260: $cucourseid%$cudom+
5261: $cpart%$cuname+
5262: $cpart%$cudom);
5263: } else {
5264: $return.= ($cunique%$cuname+
5265: $cunique%$cudom+
5266: $cusymb%$cuname+
5267: $cusymb%$cudom+
5268: $cucourseid%$cuname+
5269: $cucourseid%$cudom);
5270: }
5271: return $return;
5272: }
5273:
5274: sub receipt {
5275: my ($part)=@_;
5276: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
5277: return &ireceipt($name,$domain,$courseid,$symb,$part);
5278: }
5279:
5280: # ------------------------------------------------------------ Serves up a file
5281: # returns either the contents of the file or
5282: # -1 if the file doesn't exist
5283: #
5284: # if the target is a file that was uploaded via DOCS,
5285: # a check will be made to see if a current copy exists on the local server,
5286: # if it does this will be served, otherwise a copy will be retrieved from
5287: # the home server for the course and stored in /home/httpd/html/userfiles on
5288: # the local server.
5289:
5290: sub getfile {
5291: my ($file) = @_;
5292: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
5293: &repcopy($file);
5294: return &readfile($file);
5295: }
5296:
5297: sub repcopy_userfile {
5298: my ($file)=@_;
5299: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
5300: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
5301: my ($cdom,$cnum,$filename) =
5302: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
5303: my ($info,$rtncode);
5304: my $uri="/uploaded/$cdom/$cnum/$filename";
5305: if (-e "$file") {
5306: my @fileinfo = stat($file);
5307: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
5308: if ($lwpresp ne 'ok') {
5309: if ($rtncode eq '404') {
5310: unlink($file);
5311: }
5312: #my $ua=new LWP::UserAgent;
5313: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5314: #my $response=$ua->request($request);
5315: #if ($response->is_success()) {
5316: # return $response->content;
5317: # } else {
5318: # return -1;
5319: # }
5320: return -1;
5321: }
5322: if ($info < $fileinfo[9]) {
5323: return 'ok';
5324: }
5325: $info = '';
5326: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5327: if ($lwpresp ne 'ok') {
5328: return -1;
5329: }
5330: } else {
5331: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5332: if ($lwpresp ne 'ok') {
5333: my $ua=new LWP::UserAgent;
5334: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5335: my $response=$ua->request($request);
5336: if ($response->is_success()) {
5337: $info=$response->content;
5338: } else {
5339: return -1;
5340: }
5341: }
5342: my @parts = ($cdom,$cnum);
5343: if ($filename =~ m|^(.+)/[^/]+$|) {
5344: push @parts, split(/\//,$1);
5345: }
5346: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
5347: foreach my $part (@parts) {
5348: $path .= '/'.$part;
5349: if (!-e $path) {
5350: mkdir($path,0770);
5351: }
5352: }
5353: }
5354: open(FILE,">$file");
5355: print FILE $info;
5356: close(FILE);
5357: return 'ok';
5358: }
5359:
5360: sub tokenwrapper {
5361: my $uri=shift;
5362: $uri=~s|^http\://([^/]+)||;
5363: $uri=~s|^/||;
5364: $env{'user.environment'}=~/\/([^\/]+)\.id/;
5365: my $token=$1;
5366: my (undef,$udom,$uname,$file)=split('/',$uri,4);
5367: if ($udom && $uname && $file) {
5368: $file=~s|(\?\.*)*$||;
5369: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
5370: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
5371: (($uri=~/\?/)?'&':'?').'token='.$token.
5372: '&tokenissued='.$perlvar{'lonHostID'};
5373: } else {
5374: return '/adm/notfound.html';
5375: }
5376: }
5377:
5378: sub getuploaded {
5379: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
5380: $uri=~s/^\///;
5381: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
5382: my $ua=new LWP::UserAgent;
5383: my $request=new HTTP::Request($reqtype,$uri);
5384: my $response=$ua->request($request);
5385: $$rtncode = $response->code;
5386: if (! $response->is_success()) {
5387: return 'failed';
5388: }
5389: if ($reqtype eq 'HEAD') {
5390: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
5391: } elsif ($reqtype eq 'GET') {
5392: $$info = $response->content;
5393: }
5394: return 'ok';
5395: }
5396:
5397: sub readfile {
5398: my $file = shift;
5399: if ( (! -e $file ) || ($file eq '') ) { return -1; };
5400: my $fh;
5401: open($fh,"<$file");
5402: my $a='';
5403: while (<$fh>) { $a .=$_; }
5404: return $a;
5405: }
5406:
5407: sub filelocation {
5408: my ($dir,$file) = @_;
5409: my $location;
5410: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
5411: if ($file=~m:^/~:) { # is a contruction space reference
5412: $location = $file;
5413: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
5414: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
5415: my ($udom,$uname,$filename)=
5416: ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
5417: my $home=&homeserver($uname,$udom);
5418: my $is_me=0;
5419: my @ids=¤t_machine_ids();
5420: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
5421: if ($is_me) {
5422: $location=&Apache::loncommon::propath($udom,$uname).
5423: '/userfiles/'.$filename;
5424: } else {
5425: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
5426: $udom.'/'.$uname.'/'.$filename;
5427: }
5428: } else {
5429: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5430: $file=~s:^/res/:/:;
5431: if ( !( $file =~ m:^/:) ) {
5432: $location = $dir. '/'.$file;
5433: } else {
5434: $location = '/home/httpd/html/res'.$file;
5435: }
5436: }
5437: $location=~s://+:/:g; # remove duplicate /
5438: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
5439: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
5440: return $location;
5441: }
5442:
5443: sub hreflocation {
5444: my ($dir,$file)=@_;
5445: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
5446: my $finalpath=filelocation($dir,$file);
5447: $finalpath=~s-^/home/httpd/html--;
5448: $finalpath=~s-^/home/(\w+)/public_html/-/~$1/-;
5449: return $finalpath;
5450: } elsif ($file=~m-^/home-) {
5451: $file=~s-^/home/httpd/html--;
5452: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
5453: return $file;
5454: }
5455: return $file;
5456: }
5457:
5458: sub current_machine_domains {
5459: my $hostname=$hostname{$perlvar{'lonHostID'}};
5460: my @domains;
5461: while( my($id, $name) = each(%hostname)) {
5462: # &logthis("-$id-$name-$hostname-");
5463: if ($hostname eq $name) {
5464: push(@domains,$hostdom{$id});
5465: }
5466: }
5467: return @domains;
5468: }
5469:
5470: sub current_machine_ids {
5471: my $hostname=$hostname{$perlvar{'lonHostID'}};
5472: my @ids;
5473: while( my($id, $name) = each(%hostname)) {
5474: # &logthis("-$id-$name-$hostname-");
5475: if ($hostname eq $name) {
5476: push(@ids,$id);
5477: }
5478: }
5479: return @ids;
5480: }
5481:
5482: # ------------------------------------------------------------- Declutters URLs
5483:
5484: sub declutter {
5485: my $thisfn=shift;
5486: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
5487: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5488: $thisfn=~s/^\///;
5489: $thisfn=~s/^res\///;
5490: $thisfn=~s/\?.+$//;
5491: return $thisfn;
5492: }
5493:
5494: # ------------------------------------------------------------- Clutter up URLs
5495:
5496: sub clutter {
5497: my $thisfn='/'.&declutter(shift);
5498: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
5499: $thisfn='/res'.$thisfn;
5500: }
5501: return $thisfn;
5502: }
5503:
5504: sub freeze_escape {
5505: my ($value)=@_;
5506: if (ref($value)) {
5507: $value=&nfreeze($value);
5508: return '__FROZEN__'.&escape($value);
5509: }
5510: return &escape($value);
5511: }
5512:
5513: # -------------------------------------------------------- Escape Special Chars
5514:
5515: sub escape {
5516: my $str=shift;
5517: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
5518: return $str;
5519: }
5520:
5521: # ----------------------------------------------------- Un-Escape Special Chars
5522:
5523: sub unescape {
5524: my $str=shift;
5525: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
5526: return $str;
5527: }
5528:
5529: sub thaw_unescape {
5530: my ($value)=@_;
5531: if ($value =~ /^__FROZEN__/) {
5532: substr($value,0,10,undef);
5533: $value=&unescape($value);
5534: return &thaw($value);
5535: }
5536: return &unescape($value);
5537: }
5538:
5539: sub mod_perl_version {
5540: return 1;
5541: if (defined($perlvar{'MODPERL2'})) {
5542: return 2;
5543: }
5544: }
5545:
5546: sub correct_line_ends {
5547: my ($result)=@_;
5548: $$result =~s/\r\n/\n/mg;
5549: $$result =~s/\r/\n/mg;
5550: }
5551: # ================================================================ Main Program
5552:
5553: sub goodbye {
5554: &logthis("Starting Shut down");
5555: #not converted to using infrastruture and probably shouldn't be
5556: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
5557: #converted
5558: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
5559: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
5560: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
5561: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
5562: #1.1 only
5563: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
5564: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
5565: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
5566: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
5567: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
5568: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
5569: &logthis(sprintf("%-20s is %s",'hits',$hits));
5570: &flushcourselogs();
5571: &logthis("Shutting down");
5572: return DONE;
5573: }
5574:
5575: BEGIN {
5576: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
5577: unless ($readit) {
5578: {
5579: # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
5580: open(my $config,"</etc/httpd/conf/loncapa.conf");
5581:
5582: while (my $configline=<$config>) {
5583: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
5584: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5585: chomp($varvalue);
5586: $perlvar{$varname}=$varvalue;
5587: }
5588: }
5589: close($config);
5590: }
5591: {
5592: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
5593:
5594: while (my $configline=<$config>) {
5595: if ($configline =~ /^[^\#]*PerlSetVar/) {
5596: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5597: chomp($varvalue);
5598: $perlvar{$varname}=$varvalue;
5599: }
5600: }
5601: close($config);
5602: }
5603:
5604: # ------------------------------------------------------------ Read domain file
5605: {
5606: %domaindescription = ();
5607: %domain_auth_def = ();
5608: %domain_auth_arg_def = ();
5609: my $fh;
5610: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
5611: while (<$fh>) {
5612: next if (/^(\#|\s*$)/);
5613: # next if /^\#/;
5614: chomp;
5615: my ($domain, $domain_description, $def_auth, $def_auth_arg,
5616: $def_lang, $city, $longi, $lati) = split(/:/,$_);
5617: $domain_auth_def{$domain}=$def_auth;
5618: $domain_auth_arg_def{$domain}=$def_auth_arg;
5619: $domaindescription{$domain}=$domain_description;
5620: $domain_lang_def{$domain}=$def_lang;
5621: $domain_city{$domain}=$city;
5622: $domain_longi{$domain}=$longi;
5623: $domain_lati{$domain}=$lati;
5624:
5625: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
5626: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
5627: }
5628: }
5629: close ($fh);
5630: }
5631:
5632:
5633: # ------------------------------------------------------------- Read hosts file
5634: {
5635: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
5636:
5637: while (my $configline=<$config>) {
5638: next if ($configline =~ /^(\#|\s*$)/);
5639: chomp($configline);
5640: my ($id,$domain,$role,$name)=split(/:/,$configline);
5641: $name=~s/\s//g;
5642: if ($id && $domain && $role && $name) {
5643: $hostname{$id}=$name;
5644: $hostdom{$id}=$domain;
5645: if ($role eq 'library') { $libserv{$id}=$name; }
5646: }
5647: }
5648: close($config);
5649: # FIXME: dev server don't want this, production servers _do_ want this
5650: #&get_iphost();
5651: }
5652:
5653: sub get_iphost {
5654: if (%iphost) { return %iphost; }
5655: foreach my $id (keys(%hostname)) {
5656: my $name=$hostname{$id};
5657: my $ip = gethostbyname($name);
5658: if (!$ip || length($ip) ne 4) {
5659: &logthis("Skipping host $id name $name no IP found\n");
5660: next;
5661: }
5662: $ip=inet_ntoa($ip);
5663: push(@{$iphost{$ip}},$id);
5664: }
5665: return %iphost;
5666: }
5667:
5668: # ------------------------------------------------------ Read spare server file
5669: {
5670: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
5671:
5672: while (my $configline=<$config>) {
5673: chomp($configline);
5674: if ($configline) {
5675: $spareid{$configline}=1;
5676: }
5677: }
5678: close($config);
5679: }
5680: # ------------------------------------------------------------ Read permissions
5681: {
5682: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
5683:
5684: while (my $configline=<$config>) {
5685: chomp($configline);
5686: if ($configline) {
5687: my ($role,$perm)=split(/ /,$configline);
5688: if ($perm ne '') { $pr{$role}=$perm; }
5689: }
5690: }
5691: close($config);
5692: }
5693:
5694: # -------------------------------------------- Read plain texts for permissions
5695: {
5696: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
5697:
5698: while (my $configline=<$config>) {
5699: chomp($configline);
5700: if ($configline) {
5701: my ($short,$plain)=split(/:/,$configline);
5702: if ($plain ne '') { $prp{$short}=$plain; }
5703: }
5704: }
5705: close($config);
5706: }
5707:
5708: # ---------------------------------------------------------- Read package table
5709: {
5710: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
5711:
5712: while (my $configline=<$config>) {
5713: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
5714: chomp($configline);
5715: my ($short,$plain)=split(/:/,$configline);
5716: my ($pack,$name)=split(/\&/,$short);
5717: if ($plain ne '') {
5718: $packagetab{$pack.'&'.$name.'&name'}=$name;
5719: $packagetab{$short}=$plain;
5720: }
5721: }
5722: close($config);
5723: }
5724:
5725: # ------------- set up temporary directory
5726: {
5727: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
5728:
5729: }
5730:
5731: $memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
5732:
5733: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
5734: $dumpcount=0;
5735:
5736: &logtouch();
5737: &logthis('<font color=yellow>INFO: Read configuration</font>');
5738: $readit=1;
5739: {
5740: use integer;
5741: my $test=(2**32)+1;
5742: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
5743: &logthis(" Detected 64bit platform ($_64bit)");
5744: }
5745: }
5746: }
5747:
5748: 1;
5749: __END__
5750:
5751: =pod
5752:
5753: =head1 NAME
5754:
5755: Apache::lonnet - Subroutines to ask questions about things in the network.
5756:
5757: =head1 SYNOPSIS
5758:
5759: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
5760:
5761: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
5762:
5763: Common parameters:
5764:
5765: =over 4
5766:
5767: =item *
5768:
5769: $uname : an internal username (if $cname expecting a course Id specifically)
5770:
5771: =item *
5772:
5773: $udom : a domain (if $cdom expecting a course's domain specifically)
5774:
5775: =item *
5776:
5777: $symb : a resource instance identifier
5778:
5779: =item *
5780:
5781: $namespace : the name of a .db file that contains the data needed or
5782: being set.
5783:
5784: =back
5785:
5786: =head1 OVERVIEW
5787:
5788: lonnet provides subroutines which interact with the
5789: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
5790: about classes, users, and resources.
5791:
5792: For many of these objects you can also use this to store data about
5793: them or modify them in various ways.
5794:
5795: =head2 Symbs
5796:
5797: To identify a specific instance of a resource, LON-CAPA uses symbols
5798: or "symbs"X<symb>. These identifiers are built from the URL of the
5799: map, the resource number of the resource in the map, and the URL of
5800: the resource itself. The latter is somewhat redundant, but might help
5801: if maps change.
5802:
5803: An example is
5804:
5805: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
5806:
5807: The respective map entry is
5808:
5809: <resource id="19" src="/res/msu/korte/tests/part12.problem"
5810: title="Problem 2">
5811: </resource>
5812:
5813: Symbs are used by the random number generator, as well as to store and
5814: restore data specific to a certain instance of for example a problem.
5815:
5816: =head2 Storing And Retrieving Data
5817:
5818: X<store()>X<cstore()>X<restore()>Three of the most important functions
5819: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
5820: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
5821: is is the non-critical message twin of cstore. These functions are for
5822: handlers to store a perl hash to a user's permanent data space in an
5823: easy manner, and to retrieve it again on another call. It is expected
5824: that a handler would use this once at the beginning to retrieve data,
5825: and then again once at the end to send only the new data back.
5826:
5827: The data is stored in the user's data directory on the user's
5828: homeserver under the ID of the course.
5829:
5830: The hash that is returned by restore will have all of the previous
5831: value for all of the elements of the hash.
5832:
5833: Example:
5834:
5835: #creating a hash
5836: my %hash;
5837: $hash{'foo'}='bar';
5838:
5839: #storing it
5840: &Apache::lonnet::cstore(\%hash);
5841:
5842: #changing a value
5843: $hash{'foo'}='notbar';
5844:
5845: #adding a new value
5846: $hash{'bar'}='foo';
5847: &Apache::lonnet::cstore(\%hash);
5848:
5849: #retrieving the hash
5850: my %history=&Apache::lonnet::restore();
5851:
5852: #print the hash
5853: foreach my $key (sort(keys(%history))) {
5854: print("\%history{$key} = $history{$key}");
5855: }
5856:
5857: Will print out:
5858:
5859: %history{1:foo} = bar
5860: %history{1:keys} = foo:timestamp
5861: %history{1:timestamp} = 990455579
5862: %history{2:bar} = foo
5863: %history{2:foo} = notbar
5864: %history{2:keys} = foo:bar:timestamp
5865: %history{2:timestamp} = 990455580
5866: %history{bar} = foo
5867: %history{foo} = notbar
5868: %history{timestamp} = 990455580
5869: %history{version} = 2
5870:
5871: Note that the special hash entries C<keys>, C<version> and
5872: C<timestamp> were added to the hash. C<version> will be equal to the
5873: total number of versions of the data that have been stored. The
5874: C<timestamp> attribute will be the UNIX time the hash was
5875: stored. C<keys> is available in every historical section to list which
5876: keys were added or changed at a specific historical revision of a
5877: hash.
5878:
5879: B<Warning>: do not store the hash that restore returns directly. This
5880: will cause a mess since it will restore the historical keys as if the
5881: were new keys. I.E. 1:foo will become 1:1:foo etc.
5882:
5883: Calling convention:
5884:
5885: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
5886: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
5887:
5888: For more detailed information, see lonnet specific documentation.
5889:
5890: =head1 RETURN MESSAGES
5891:
5892: =over 4
5893:
5894: =item * B<con_lost>: unable to contact remote host
5895:
5896: =item * B<con_delayed>: unable to contact remote host, message will be delivered
5897: when the connection is brought back up
5898:
5899: =item * B<con_failed>: unable to contact remote host and unable to save message
5900: for later delivery
5901:
5902: =item * B<error:>: an error a occured, a description of the error follows the :
5903:
5904: =item * B<no_such_host>: unable to fund a host associated with the user/domain
5905: that was requested
5906:
5907: =back
5908:
5909: =head1 PUBLIC SUBROUTINES
5910:
5911: =head2 Session Environment Functions
5912:
5913: =over 4
5914:
5915: =item *
5916: X<appenv()>
5917: B<appenv(%hash)>: the value of %hash is written to
5918: the user envirnoment file, and will be restored for each access this
5919: user makes during this session, also modifies the %env for the current
5920: process
5921:
5922: =item *
5923: X<delenv()>
5924: B<delenv($regexp)>: removes all items from the session
5925: environment file that matches the regular expression in $regexp. The
5926: values are also delted from the current processes %env.
5927:
5928: =back
5929:
5930: =head2 User Information
5931:
5932: =over 4
5933:
5934: =item *
5935: X<queryauthenticate()>
5936: B<queryauthenticate($uname,$udom)>: try to determine user's current
5937: authentication scheme
5938:
5939: =item *
5940: X<authenticate()>
5941: B<authenticate($uname,$upass,$udom)>: try to
5942: authenticate user from domain's lib servers (first use the current
5943: one). C<$upass> should be the users password.
5944:
5945: =item *
5946: X<homeserver()>
5947: B<homeserver($uname,$udom)>: find the server which has
5948: the user's directory and files (there must be only one), this caches
5949: the answer, and also caches if there is a borken connection.
5950:
5951: =item *
5952: X<idget()>
5953: B<idget($udom,@ids)>: find the usernames behind a list of IDs
5954: (IDs are a unique resource in a domain, there must be only 1 ID per
5955: username, and only 1 username per ID in a specific domain) (returns
5956: hash: id=>name,id=>name)
5957:
5958: =item *
5959: X<idrget()>
5960: B<idrget($udom,@unames)>: find the IDs behind a list of
5961: usernames (returns hash: name=>id,name=>id)
5962:
5963: =item *
5964: X<idput()>
5965: B<idput($udom,%ids)>: store away a list of names and associated IDs
5966:
5967: =item *
5968: X<rolesinit()>
5969: B<rolesinit($udom,$username,$authhost)>: get user privileges
5970:
5971: =item *
5972: X<getsection()>
5973: B<getsection($udom,$uname,$cname)>: finds the section of student in the
5974: course $cname, return section name/number or '' for "not in course"
5975: and '-1' for "no section"
5976:
5977: =item *
5978: X<userenvironment()>
5979: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
5980: passed in @what from the requested user's environment, returns a hash
5981:
5982: =back
5983:
5984: =head2 User Roles
5985:
5986: =over 4
5987:
5988: =item *
5989:
5990: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
5991: actions
5992: F: full access
5993: U,I,K: authentication modes (cxx only)
5994: '': forbidden
5995: 1: user needs to choose course
5996: 2: browse allowed
5997:
5998: =item *
5999:
6000: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
6001: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
6002: and course level
6003:
6004: =item *
6005:
6006: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
6007: explanation of a user role term
6008:
6009: =back
6010:
6011: =head2 User Modification
6012:
6013: =over 4
6014:
6015: =item *
6016:
6017: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
6018: user for the level given by URL. Optional start and end dates (leave empty
6019: string or zero for "no date")
6020:
6021: =item *
6022:
6023: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
6024: change a users, password, possible return values are: ok,
6025: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
6026: refused
6027:
6028: =item *
6029:
6030: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
6031:
6032: =item *
6033:
6034: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
6035: modify user
6036:
6037: =item *
6038:
6039: modifystudent
6040:
6041: modify a students enrollment and identification information.
6042: The course id is resolved based on the current users environment.
6043: This means the envoking user must be a course coordinator or otherwise
6044: associated with a course.
6045:
6046: This call is essentially a wrapper for lonnet::modifyuser and
6047: lonnet::modify_student_enrollment
6048:
6049: Inputs:
6050:
6051: =over 4
6052:
6053: =item B<$udom> Students loncapa domain
6054:
6055: =item B<$uname> Students loncapa login name
6056:
6057: =item B<$uid> Students id/student number
6058:
6059: =item B<$umode> Students authentication mode
6060:
6061: =item B<$upass> Students password
6062:
6063: =item B<$first> Students first name
6064:
6065: =item B<$middle> Students middle name
6066:
6067: =item B<$last> Students last name
6068:
6069: =item B<$gene> Students generation
6070:
6071: =item B<$usec> Students section in course
6072:
6073: =item B<$end> Unix time of the roles expiration
6074:
6075: =item B<$start> Unix time of the roles start date
6076:
6077: =item B<$forceid> If defined, allow $uid to be changed
6078:
6079: =item B<$desiredhome> server to use as home server for student
6080:
6081: =back
6082:
6083: =item *
6084:
6085: modify_student_enrollment
6086:
6087: Change a students enrollment status in a class. The environment variable
6088: 'role.request.course' must be defined for this function to proceed.
6089:
6090: Inputs:
6091:
6092: =over 4
6093:
6094: =item $udom, students domain
6095:
6096: =item $uname, students name
6097:
6098: =item $uid, students user id
6099:
6100: =item $first, students first name
6101:
6102: =item $middle
6103:
6104: =item $last
6105:
6106: =item $gene
6107:
6108: =item $usec
6109:
6110: =item $end
6111:
6112: =item $start
6113:
6114: =back
6115:
6116:
6117: =item *
6118:
6119: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
6120: custom role; give a custom role to a user for the level given by URL. Specify
6121: name and domain of role author, and role name
6122:
6123: =item *
6124:
6125: revokerole($udom,$uname,$url,$role) : revoke a role for url
6126:
6127: =item *
6128:
6129: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
6130:
6131: =back
6132:
6133: =head2 Course Infomation
6134:
6135: =over 4
6136:
6137: =item *
6138:
6139: coursedescription($courseid) : course description
6140:
6141: =item *
6142:
6143: courseresdata($coursenum,$coursedomain,@which) : request for current
6144: parameter setting for a specific course, @what should be a list of
6145: parameters to ask about. This routine caches answers for 5 minutes.
6146:
6147: =back
6148:
6149: =head2 Course Modification
6150:
6151: =over 4
6152:
6153: =item *
6154:
6155: writecoursepref($courseid,%prefs) : write preferences (environment
6156: database) for a course
6157:
6158: =item *
6159:
6160: createcourse($udom,$description,$url) : make/modify course
6161:
6162: =back
6163:
6164: =head2 Resource Subroutines
6165:
6166: =over 4
6167:
6168: =item *
6169:
6170: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
6171:
6172: =item *
6173:
6174: repcopy($filename) : subscribes to the requested file, and attempts to
6175: replicate from the owning library server, Might return
6176: 'unavailable', 'not_found', 'forbidden', 'ok', or
6177: 'bad_request', also attempts to grab the metadata for the
6178: resource. Expects the local filesystem pathname
6179: (/home/httpd/html/res/....)
6180:
6181: =back
6182:
6183: =head2 Resource Information
6184:
6185: =over 4
6186:
6187: =item *
6188:
6189: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
6190: a vairety of different possible values, $varname should be a request
6191: string, and the other parameters can be used to specify who and what
6192: one is asking about.
6193:
6194: Possible values for $varname are environment.lastname (or other item
6195: from the envirnment hash), user.name (or someother aspect about the
6196: user), resource.0.maxtries (or some other part and parameter of a
6197: resource)
6198:
6199: =item *
6200:
6201: directcondval($number) : get current value of a condition; reads from a state
6202: string
6203:
6204: =item *
6205:
6206: condval($condidx) : value of condition index based on state
6207:
6208: =item *
6209:
6210: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
6211: resource's metadata, $what should be either a specific key, or either
6212: 'keys' (to get a list of possible keys) or 'packages' to get a list of
6213: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
6214:
6215: this function automatically caches all requests
6216:
6217: =item *
6218:
6219: metadata_query($query,$custom,$customshow) : make a metadata query against the
6220: network of library servers; returns file handle of where SQL and regex results
6221: will be stored for query
6222:
6223: =item *
6224:
6225: symbread($filename) : return symbolic list entry (filename argument optional);
6226: returns the data handle
6227:
6228: =item *
6229:
6230: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
6231: a possible symb for the URL in $thisfn, and if is an encryypted
6232: resource that the user accessed using /enc/ returns a 1 on success, 0
6233: on failure, user must be in a course, as it assumes the existance of
6234: the course initial hash, and uses $env('request.course.id'}
6235:
6236:
6237: =item *
6238:
6239: symbclean($symb) : removes versions numbers from a symb, returns the
6240: cleaned symb
6241:
6242: =item *
6243:
6244: is_on_map($uri) : checks if the $uri is somewhere on the current
6245: course map, user must be in a course for it to work.
6246:
6247: =item *
6248:
6249: numval($salt) : return random seed value (addend for rndseed)
6250:
6251: =item *
6252:
6253: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
6254: a random seed, all arguments are optional, if they aren't sent it uses the
6255: environment to derive them. Note: if symb isn't sent and it can't get one
6256: from &symbread it will use the current time as its return value
6257:
6258: =item *
6259:
6260: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
6261: unfakeable, receipt
6262:
6263: =item *
6264:
6265: receipt() : API to ireceipt working off of env values; given out to users
6266:
6267: =item *
6268:
6269: countacc($url) : count the number of accesses to a given URL
6270:
6271: =item *
6272:
6273: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
6274:
6275: =item *
6276:
6277: checkin($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 $tcrsid)
6278:
6279: =item *
6280:
6281: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
6282:
6283: =item *
6284:
6285: devalidate($symb) : devalidate temporary spreadsheet calculations,
6286: forcing spreadsheet to reevaluate the resource scores next time.
6287:
6288: =back
6289:
6290: =head2 Storing/Retreiving Data
6291:
6292: =over 4
6293:
6294: =item *
6295:
6296: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
6297: for this url; hashref needs to be given and should be a \%hashname; the
6298: remaining args aren't required and if they aren't passed or are '' they will
6299: be derived from the env
6300:
6301: =item *
6302:
6303: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
6304: uses critical subroutine
6305:
6306: =item *
6307:
6308: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
6309: all args are optional
6310:
6311: =item *
6312:
6313: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
6314: works very similar to store/cstore, but all data is stored in a
6315: temporary location and can be reset using tmpreset, $storehash should
6316: be a hash reference, returns nothing on success
6317:
6318: =item *
6319:
6320: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
6321: similar to restore, but all data is stored in a temporary location and
6322: can be reset using tmpreset. Returns a hash of values on success,
6323: error string otherwise.
6324:
6325: =item *
6326:
6327: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
6328: deltes all keys for $symb form the temporary storage hash.
6329:
6330: =item *
6331:
6332: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6333: reference filled in from namesp ($udom and $uname are optional)
6334:
6335: =item *
6336:
6337: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
6338: namesp ($udom and $uname are optional)
6339:
6340: =item *
6341:
6342: dump($namespace,$udom,$uname,$regexp) :
6343: dumps the complete (or key matching regexp) namespace into a hash
6344: ($udom, $uname and $regexp are optional)
6345:
6346: =item *
6347:
6348: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
6349: $store can be a scalar, an array reference, or if the amount to be
6350: incremented is > 1, a hash reference.
6351:
6352: ($udom and $uname are optional)
6353:
6354: =item *
6355:
6356: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
6357: ($udom and $uname are optional)
6358:
6359: =item *
6360:
6361: putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
6362: keys used in storehash include version information (e.g., 1:$symb:message etc.) as
6363: used in records written by &store and retrieved by &restore. This function
6364: was created for use in editing discussion posts, without incrementing the
6365: version number included in the key for a particular post. The colon
6366: separated list of attribute names (e.g., the value associated with the key
6367: 1:keys:$symb) is also generated and passed in the ampersand separated
6368: items sent to lonnet::reply().
6369:
6370: =item *
6371:
6372: cput($namespace,$storehash,$udom,$uname) : critical put
6373: ($udom and $uname are optional)
6374:
6375: =item *
6376:
6377: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6378: reference filled in from namesp (encrypts the return communication)
6379: ($udom and $uname are optional)
6380:
6381: =item *
6382:
6383: log($udom,$name,$home,$message) : write to permanent log for user; use
6384: critical subroutine
6385:
6386: =back
6387:
6388: =head2 Network Status Functions
6389:
6390: =over 4
6391:
6392: =item *
6393:
6394: dirlist($uri) : return directory list based on URI
6395:
6396: =item *
6397:
6398: spareserver() : find server with least workload from spare.tab
6399:
6400: =back
6401:
6402: =head2 Apache Request
6403:
6404: =over 4
6405:
6406: =item *
6407:
6408: ssi($url,%hash) : server side include, does a complete request cycle on url to
6409: localhost, posts hash
6410:
6411: =back
6412:
6413: =head2 Data to String to Data
6414:
6415: =over 4
6416:
6417: =item *
6418:
6419: hash2str(%hash) : convert a hash into a string complete with escaping and '='
6420: and '&' separators, supports elements that are arrayrefs and hashrefs
6421:
6422: =item *
6423:
6424: hashref2str($hashref) : convert a hashref into a string complete with
6425: escaping and '=' and '&' separators, supports elements that are
6426: arrayrefs and hashrefs
6427:
6428: =item *
6429:
6430: arrayref2str($arrayref) : convert an arrayref into a string complete
6431: with escaping and '&' separators, supports elements that are arrayrefs
6432: and hashrefs
6433:
6434: =item *
6435:
6436: str2hash($string) : convert string to hash using unescaping and
6437: splitting on '=' and '&', supports elements that are arrayrefs and
6438: hashrefs
6439:
6440: =item *
6441:
6442: str2array($string) : convert string to hash using unescaping and
6443: splitting on '&', supports elements that are arrayrefs and hashrefs
6444:
6445: =back
6446:
6447: =head2 Logging Routines
6448:
6449: =over 4
6450:
6451: These routines allow one to make log messages in the lonnet.log and
6452: lonnet.perm logfiles.
6453:
6454: =item *
6455:
6456: logtouch() : make sure the logfile, lonnet.log, exists
6457:
6458: =item *
6459:
6460: logthis() : append message to the normal lonnet.log file, it gets
6461: preiodically rolled over and deleted.
6462:
6463: =item *
6464:
6465: logperm() : append a permanent message to lonnet.perm.log, this log
6466: file never gets deleted by any automated portion of the system, only
6467: messages of critical importance should go in here.
6468:
6469: =back
6470:
6471: =head2 General File Helper Routines
6472:
6473: =over 4
6474:
6475: =item *
6476:
6477: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
6478: (a) files in /uploaded
6479: (i) If a local copy of the file exists -
6480: compares modification date of local copy with last-modified date for
6481: definitive version stored on home server for course. If local copy is
6482: stale, requests a new version from the home server and stores it.
6483: If the original has been removed from the home server, then local copy
6484: is unlinked.
6485: (ii) If local copy does not exist -
6486: requests the file from the home server and stores it.
6487:
6488: If $caller is 'uploadrep':
6489: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
6490: for request for files originally uploaded via DOCS.
6491: - returns 'ok' if fresh local copy now available, -1 otherwise.
6492:
6493: Otherwise:
6494: This indicates a call from the content generation phase of the request.
6495: - returns the entire contents of the file or -1.
6496:
6497: (b) files in /res
6498: - returns the entire contents of a file or -1;
6499: it properly subscribes to and replicates the file if neccessary.
6500:
6501: =item *
6502:
6503: filelocation($dir,$file) : returns file system location of a file
6504: based on URI; meant to be "fairly clean" absolute reference, $dir is a
6505: directory that relative $file lookups are to looked in ($dir of /a/dir
6506: and a file of ../bob will become /a/bob)
6507:
6508: =item *
6509:
6510: hreflocation($dir,$file) : returns file system location or a URL; same as
6511: filelocation except for hrefs
6512:
6513: =item *
6514:
6515: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
6516:
6517: =back
6518:
6519: =head2 Usererfile file routines (/uploaded*)
6520:
6521: =over 4
6522:
6523: =item *
6524:
6525: userfileupload(): main rotine for putting a file in a user or course's
6526: filespace, arguments are,
6527:
6528: formname - required - this is the name of the element in $env where the
6529: filename, and the contents of the file to create/modifed exist
6530: the filename is in $env{'form.'.$formname.'.filename'} and the
6531: contents of the file is located in $env{'form.'.$formname}
6532: coursedoc - if true, store the file in the course of the active role
6533: of the current user
6534: subdir - required - subdirectory to put the file in under ../userfiles/
6535: if undefined, it will be placed in "unknown"
6536:
6537: (This routine calls clean_filename() to remove any dangerous
6538: characters from the filename, and then calls finuserfileupload() to
6539: complete the transaction)
6540:
6541: returns either the url of the uploaded file (/uploaded/....) if successful
6542: and /adm/notfound.html if unsuccessful
6543:
6544: =item *
6545:
6546: clean_filename(): routine for cleaing a filename up for storage in
6547: userfile space, argument is:
6548:
6549: filename - proposed filename
6550:
6551: returns: the new clean filename
6552:
6553: =item *
6554:
6555: finishuserfileupload(): routine that creaes and sends the file to
6556: userspace, probably shouldn't be called directly
6557:
6558: docuname: username or courseid of destination for the file
6559: docudom: domain of user/course of destination for the file
6560: docuhome: loncapa id of the library server that is getting the file
6561: formname: same as for userfileupload()
6562: fname: filename (inculding subdirectories) for the file
6563:
6564: returns either the url of the uploaded file (/uploaded/....) if successful
6565: and /adm/notfound.html if unsuccessful
6566:
6567: =item *
6568:
6569: renameuserfile(): renames an existing userfile to a new name
6570:
6571: Args:
6572: docuname: username or courseid of destination for the file
6573: docudom: domain of user/course of destination for the file
6574: old: current file name (including any subdirs under userfiles)
6575: new: desired file name (including any subdirs under userfiles)
6576:
6577: =item *
6578:
6579: mkdiruserfile(): creates a directory is a userfiles dir
6580:
6581: Args:
6582: docuname: username or courseid of destination for the file
6583: docudom: domain of user/course of destination for the file
6584: dir: dir to create (including any subdirs under userfiles)
6585:
6586: =item *
6587:
6588: removeuserfile(): removes a file that exists in userfiles
6589:
6590: Args:
6591: docuname: username or courseid of destination for the file
6592: docudom: domain of user/course of destination for the file
6593: fname: filname to delete (including any subdirs under userfiles)
6594:
6595: =item *
6596:
6597: removeuploadedurl(): convience function for removeuserfile()
6598:
6599: Args:
6600: url: a full /uploaded/... url to delete
6601:
6602: =back
6603:
6604: =head2 HTTP Helper Routines
6605:
6606: =over 4
6607:
6608: =item *
6609:
6610: escape() : unpack non-word characters into CGI-compatible hex codes
6611:
6612: =item *
6613:
6614: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
6615:
6616: =back
6617:
6618: =head1 PRIVATE SUBROUTINES
6619:
6620: =head2 Underlying communication routines (Shouldn't call)
6621:
6622: =over 4
6623:
6624: =item *
6625:
6626: subreply() : tries to pass a message to lonc, returns con_lost if incapable
6627:
6628: =item *
6629:
6630: reply() : uses subreply to send a message to remote machine, logs all failures
6631:
6632: =item *
6633:
6634: critical() : passes a critical message to another server; if cannot
6635: get through then place message in connection buffer directory and
6636: returns con_delayed, if incapable of saving message, returns
6637: con_failed
6638:
6639: =item *
6640:
6641: reconlonc() : tries to reconnect lonc client processes.
6642:
6643: =back
6644:
6645: =head2 Resource Access Logging
6646:
6647: =over 4
6648:
6649: =item *
6650:
6651: flushcourselogs() : flush (save) buffer logs and access logs
6652:
6653: =item *
6654:
6655: courselog($what) : save message for course in hash
6656:
6657: =item *
6658:
6659: courseacclog($what) : save message for course using &courselog(). Perform
6660: special processing for specific resource types (problems, exams, quizzes, etc).
6661:
6662: =item *
6663:
6664: goodbye() : flush course logs and log shutting down; it is called in srm.conf
6665: as a PerlChildExitHandler
6666:
6667: =back
6668:
6669: =head2 Other
6670:
6671: =over 4
6672:
6673: =item *
6674:
6675: symblist($mapname,%newhash) : update symbolic storage links
6676:
6677: =back
6678:
6679: =cut
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