File:
[LON-CAPA] /
loncom /
lonnet /
perl /
lonnet.pm
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Tue Nov 15 21:35:02 2005 UTC (18 years, 8 months ago) by
raeburn
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Functionality for course groups. Group information from roles.db not displayed as a selectable role, but privileges are provided in user's environment, contingenet on the time window for the user's access to the group. If a user selects a role in a course, the group privileges will be available, for lonnet::allowed() checks.
1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.678 2005/11/15 21:35:02 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonnet;
31:
32: use strict;
33: use LWP::UserAgent();
34: use HTTP::Headers;
35: use HTTP::Date;
36: # use Date::Parse;
37: use vars
38: qw(%perlvar %hostname %badServerCache %iphost %spareid %hostdom
39: %libserv %pr %prp $memcache %packagetab
40: %courselogs %accesshash %userrolehash %domainrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf
42: %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir $_64bit
44: %env);
45:
46: use IO::Socket;
47: use GDBM_File;
48: use Apache::Constants qw(:common :http);
49: use HTML::LCParser;
50: use HTML::Parser;
51: use Fcntl qw(:flock);
52: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
53: use Time::HiRes qw( gettimeofday tv_interval );
54: use Cache::Memcached;
55: use Digest::MD5;
56:
57: my $readit;
58: my $max_connection_retries = 10; # Or some such value.
59:
60: require Exporter;
61:
62: our @ISA = qw (Exporter);
63: our @EXPORT = qw(%env);
64:
65: =pod
66:
67: =head1 Package Variables
68:
69: These are largely undocumented, so if you decipher one please note it here.
70:
71: =over 4
72:
73: =item $processmarker
74:
75: Contains the time this process was started and this servers host id.
76:
77: =item $dumpcount
78:
79: Counts the number of times a message log flush has been attempted (regardless
80: of success) by this process. Used as part of the filename when messages are
81: delayed.
82:
83: =back
84:
85: =cut
86:
87:
88: # --------------------------------------------------------------------- Logging
89:
90: sub logtouch {
91: my $execdir=$perlvar{'lonDaemons'};
92: unless (-e "$execdir/logs/lonnet.log") {
93: open(my $fh,">>$execdir/logs/lonnet.log");
94: close $fh;
95: }
96: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
97: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
98: }
99:
100: sub logthis {
101: my $message=shift;
102: my $execdir=$perlvar{'lonDaemons'};
103: my $now=time;
104: my $local=localtime($now);
105: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
106: print $fh "$local ($$): $message\n";
107: close($fh);
108: }
109: return 1;
110: }
111:
112: sub logperm {
113: my $message=shift;
114: my $execdir=$perlvar{'lonDaemons'};
115: my $now=time;
116: my $local=localtime($now);
117: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
118: print $fh "$now:$message:$local\n";
119: close($fh);
120: }
121: return 1;
122: }
123:
124: # -------------------------------------------------- Non-critical communication
125: sub subreply {
126: my ($cmd,$server)=@_;
127: my $peerfile="$perlvar{'lonSockDir'}/$server";
128: #
129: # With loncnew process trimming, there's a timing hole between lonc server
130: # process exit and the master server picking up the listen on the AF_UNIX
131: # socket. In that time interval, a lock file will exist:
132:
133: my $lockfile=$peerfile.".lock";
134: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
135: sleep(1);
136: }
137: # At this point, either a loncnew parent is listening or an old lonc
138: # or loncnew child is listening so we can connect or everything's dead.
139: #
140: # We'll give the connection a few tries before abandoning it. If
141: # connection is not possible, we'll con_lost back to the client.
142: #
143: my $client;
144: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
145: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
146: Type => SOCK_STREAM,
147: Timeout => 10);
148: if($client) {
149: last; # Connected!
150: }
151: sleep(1); # Try again later if failed connection.
152: }
153: my $answer;
154: if ($client) {
155: print $client "$cmd\n";
156: $answer=<$client>;
157: if (!$answer) { $answer="con_lost"; }
158: chomp($answer);
159: } else {
160: $answer = 'con_lost'; # Failed connection.
161: }
162: return $answer;
163: }
164:
165: sub reply {
166: my ($cmd,$server)=@_;
167: unless (defined($hostname{$server})) { return 'no_such_host'; }
168: my $answer=subreply($cmd,$server);
169: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
170: &logthis("<font color=\"blue\">WARNING:".
171: " $cmd to $server returned $answer</font>");
172: }
173: return $answer;
174: }
175:
176: # ----------------------------------------------------------- Send USR1 to lonc
177:
178: sub reconlonc {
179: my $peerfile=shift;
180: &logthis("Trying to reconnect for $peerfile");
181: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
182: if (open(my $fh,"<$loncfile")) {
183: my $loncpid=<$fh>;
184: chomp($loncpid);
185: if (kill 0 => $loncpid) {
186: &logthis("lonc at pid $loncpid responding, sending USR1");
187: kill USR1 => $loncpid;
188: sleep 1;
189: if (-e "$peerfile") { return; }
190: &logthis("$peerfile still not there, give it another try");
191: sleep 5;
192: if (-e "$peerfile") { return; }
193: &logthis(
194: "<font color=\"blue\">WARNING: $peerfile still not there, giving up</font>");
195: } else {
196: &logthis(
197: "<font color=\"blue\">WARNING:".
198: " lonc at pid $loncpid not responding, giving up</font>");
199: }
200: } else {
201: &logthis('<font color="blue">WARNING: lonc not running, giving up</font>');
202: }
203: }
204:
205: # ------------------------------------------------------ Critical communication
206:
207: sub critical {
208: my ($cmd,$server)=@_;
209: unless ($hostname{$server}) {
210: &logthis("<font color=\"blue\">WARNING:".
211: " Critical message to unknown server ($server)</font>");
212: return 'no_such_host';
213: }
214: my $answer=reply($cmd,$server);
215: if ($answer eq 'con_lost') {
216: &reconlonc("$perlvar{'lonSockDir'}/$server");
217: my $answer=reply($cmd,$server);
218: if ($answer eq 'con_lost') {
219: my $now=time;
220: my $middlename=$cmd;
221: $middlename=substr($middlename,0,16);
222: $middlename=~s/\W//g;
223: my $dfilename=
224: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
225: $dumpcount++;
226: {
227: my $dfh;
228: if (open($dfh,">$dfilename")) {
229: print $dfh "$cmd\n";
230: close($dfh);
231: }
232: }
233: sleep 2;
234: my $wcmd='';
235: {
236: my $dfh;
237: if (open($dfh,"<$dfilename")) {
238: $wcmd=<$dfh>;
239: close($dfh);
240: }
241: }
242: chomp($wcmd);
243: if ($wcmd eq $cmd) {
244: &logthis("<font color=\"blue\">WARNING: ".
245: "Connection buffer $dfilename: $cmd</font>");
246: &logperm("D:$server:$cmd");
247: return 'con_delayed';
248: } else {
249: &logthis("<font color=\"red\">CRITICAL:"
250: ." Critical connection failed: $server $cmd</font>");
251: &logperm("F:$server:$cmd");
252: return 'con_failed';
253: }
254: }
255: }
256: return $answer;
257: }
258:
259: # ------------------------------------------- Transfer profile into environment
260:
261: sub transfer_profile_to_env {
262: my ($lonidsdir,$handle)=@_;
263: my @profile;
264: {
265: open(my $idf,"$lonidsdir/$handle.id");
266: flock($idf,LOCK_SH);
267: @profile=<$idf>;
268: close($idf);
269: }
270: my $envi;
271: my %Remove;
272: for ($envi=0;$envi<=$#profile;$envi++) {
273: chomp($profile[$envi]);
274: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
275: $env{$envname} = $envvalue;
276: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
277: if ($time < time-300) {
278: $Remove{$key}++;
279: }
280: }
281: }
282: $env{'user.environment'} = "$lonidsdir/$handle.id";
283: foreach my $expired_key (keys(%Remove)) {
284: &delenv($expired_key);
285: }
286: }
287:
288: # ---------------------------------------------------------- Append Environment
289:
290: sub appenv {
291: my %newenv=@_;
292: foreach (keys %newenv) {
293: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
294: &logthis("<font color=\"blue\">WARNING: ".
295: "Attempt to modify environment ".$_." to ".$newenv{$_}
296: .'</font>');
297: delete($newenv{$_});
298: } else {
299: $env{$_}=$newenv{$_};
300: }
301: }
302:
303: my $lockfh;
304: unless (open($lockfh,"$env{'user.environment'}")) {
305: return 'error: '.$!;
306: }
307: unless (flock($lockfh,LOCK_EX)) {
308: &logthis("<font color=\"blue\">WARNING: ".
309: 'Could not obtain exclusive lock in appenv: '.$!);
310: close($lockfh);
311: return 'error: '.$!;
312: }
313:
314: my @oldenv;
315: {
316: my $fh;
317: unless (open($fh,"$env{'user.environment'}")) {
318: return 'error: '.$!;
319: }
320: @oldenv=<$fh>;
321: close($fh);
322: }
323: for (my $i=0; $i<=$#oldenv; $i++) {
324: chomp($oldenv[$i]);
325: if ($oldenv[$i] ne '') {
326: my ($name,$value)=split(/=/,$oldenv[$i]);
327: unless (defined($newenv{$name})) {
328: $newenv{$name}=$value;
329: }
330: }
331: }
332: {
333: my $fh;
334: unless (open($fh,">$env{'user.environment'}")) {
335: return 'error';
336: }
337: my $newname;
338: foreach $newname (keys %newenv) {
339: print $fh "$newname=$newenv{$newname}\n";
340: }
341: close($fh);
342: }
343:
344: close($lockfh);
345: return 'ok';
346: }
347: # ----------------------------------------------------- Delete from Environment
348:
349: sub delenv {
350: my $delthis=shift;
351: my %newenv=();
352: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
353: &logthis("<font color=\"blue\">WARNING: ".
354: "Attempt to delete from environment ".$delthis);
355: return 'error';
356: }
357: my @oldenv;
358: {
359: my $fh;
360: unless (open($fh,"$env{'user.environment'}")) {
361: return 'error';
362: }
363: unless (flock($fh,LOCK_SH)) {
364: &logthis("<font color=\"blue\">WARNING: ".
365: 'Could not obtain shared lock in delenv: '.$!);
366: close($fh);
367: return 'error: '.$!;
368: }
369: @oldenv=<$fh>;
370: close($fh);
371: }
372: {
373: my $fh;
374: unless (open($fh,">$env{'user.environment'}")) {
375: return 'error';
376: }
377: unless (flock($fh,LOCK_EX)) {
378: &logthis("<font color=\"blue\">WARNING: ".
379: 'Could not obtain exclusive lock in delenv: '.$!);
380: close($fh);
381: return 'error: '.$!;
382: }
383: foreach (@oldenv) {
384: if ($_=~/^$delthis/) {
385: my ($key,undef) = split('=',$_);
386: delete($env{$key});
387: } else {
388: print $fh $_;
389: }
390: }
391: close($fh);
392: }
393: return 'ok';
394: }
395:
396: # ------------------------------------------ Find out current server userload
397: # there is a copy in lond
398: sub userload {
399: my $numusers=0;
400: {
401: opendir(LONIDS,$perlvar{'lonIDsDir'});
402: my $filename;
403: my $curtime=time;
404: while ($filename=readdir(LONIDS)) {
405: if ($filename eq '.' || $filename eq '..') {next;}
406: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
407: if ($curtime-$mtime < 1800) { $numusers++; }
408: }
409: closedir(LONIDS);
410: }
411: my $userloadpercent=0;
412: my $maxuserload=$perlvar{'lonUserLoadLim'};
413: if ($maxuserload) {
414: $userloadpercent=100*$numusers/$maxuserload;
415: }
416: $userloadpercent=sprintf("%.2f",$userloadpercent);
417: return $userloadpercent;
418: }
419:
420: # ------------------------------------------ Fight off request when overloaded
421:
422: sub overloaderror {
423: my ($r,$checkserver)=@_;
424: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
425: my $loadavg;
426: if ($checkserver eq $perlvar{'lonHostID'}) {
427: open(my $loadfile,'/proc/loadavg');
428: $loadavg=<$loadfile>;
429: $loadavg =~ s/\s.*//g;
430: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
431: close($loadfile);
432: } else {
433: $loadavg=&reply('load',$checkserver);
434: }
435: my $overload=$loadavg-100;
436: if ($overload>0) {
437: $r->err_headers_out->{'Retry-After'}=$overload;
438: $r->log_error('Overload of '.$overload.' on '.$checkserver);
439: return 413;
440: }
441: return '';
442: }
443:
444: # ------------------------------ Find server with least workload from spare.tab
445:
446: sub spareserver {
447: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
448: my $tryserver;
449: my $spareserver='';
450: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
451: my $lowestserver=$loadpercent > $userloadpercent?
452: $loadpercent : $userloadpercent;
453: foreach $tryserver (keys(%spareid)) {
454: my $loadans=&reply('load',$tryserver);
455: my $userloadans=&reply('userload',$tryserver);
456: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
457: next; #didn't get a number from the server
458: }
459: my $answer;
460: if ($loadans =~ /\d/) {
461: if ($userloadans =~ /\d/) {
462: #both are numbers, pick the bigger one
463: $answer=$loadans > $userloadans?
464: $loadans : $userloadans;
465: } else {
466: $answer = $loadans;
467: }
468: } else {
469: $answer = $userloadans;
470: }
471: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
472: if ($want_server_name) {
473: $spareserver=$tryserver;
474: } else {
475: $spareserver="http://$hostname{$tryserver}";
476: }
477: $lowestserver=$answer;
478: }
479: }
480: return $spareserver;
481: }
482:
483: # --------------------------------------------- Try to change a user's password
484:
485: sub changepass {
486: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
487: $currentpass = &escape($currentpass);
488: $newpass = &escape($newpass);
489: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
490: $server);
491: if (! $answer) {
492: &logthis("No reply on password change request to $server ".
493: "by $uname in domain $udom.");
494: } elsif ($answer =~ "^ok") {
495: &logthis("$uname in $udom successfully changed their password ".
496: "on $server.");
497: } elsif ($answer =~ "^pwchange_failure") {
498: &logthis("$uname in $udom was unable to change their password ".
499: "on $server. The action was blocked by either lcpasswd ".
500: "or pwchange");
501: } elsif ($answer =~ "^non_authorized") {
502: &logthis("$uname in $udom did not get their password correct when ".
503: "attempting to change it on $server.");
504: } elsif ($answer =~ "^auth_mode_error") {
505: &logthis("$uname in $udom attempted to change their password despite ".
506: "not being locally or internally authenticated on $server.");
507: } elsif ($answer =~ "^unknown_user") {
508: &logthis("$uname in $udom attempted to change their password ".
509: "on $server but were unable to because $server is not ".
510: "their home server.");
511: } elsif ($answer =~ "^refused") {
512: &logthis("$server refused to change $uname in $udom password because ".
513: "it was sent an unencrypted request to change the password.");
514: }
515: return $answer;
516: }
517:
518: # ----------------------- Try to determine user's current authentication scheme
519:
520: sub queryauthenticate {
521: my ($uname,$udom)=@_;
522: my $uhome=&homeserver($uname,$udom);
523: if (!$uhome) {
524: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
525: return 'no_host';
526: }
527: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
528: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
529: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
530: }
531: return $answer;
532: }
533:
534: # --------- Try to authenticate user from domain's lib servers (first this one)
535:
536: sub authenticate {
537: my ($uname,$upass,$udom)=@_;
538: $upass=escape($upass);
539: $uname=~s/\W//g;
540: my $uhome=&homeserver($uname,$udom);
541: if (!$uhome) {
542: &logthis("User $uname at $udom is unknown in authenticate");
543: return 'no_host';
544: }
545: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
546: if ($answer eq 'authorized') {
547: &logthis("User $uname at $udom authorized by $uhome");
548: return $uhome;
549: }
550: if ($answer eq 'non_authorized') {
551: &logthis("User $uname at $udom rejected by $uhome");
552: return 'no_host';
553: }
554: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
555: return 'no_host';
556: }
557:
558: # ---------------------- Find the homebase for a user from domain's lib servers
559:
560: my %homecache;
561: sub homeserver {
562: my ($uname,$udom,$ignoreBadCache)=@_;
563: my $index="$uname:$udom";
564:
565: if (exists($homecache{$index})) { return $homecache{$index}; }
566: my $tryserver;
567: foreach $tryserver (keys %libserv) {
568: next if ($ignoreBadCache ne 'true' &&
569: exists($badServerCache{$tryserver}));
570: if ($hostdom{$tryserver} eq $udom) {
571: my $answer=reply("home:$udom:$uname",$tryserver);
572: if ($answer eq 'found') {
573: return $homecache{$index}=$tryserver;
574: } elsif ($answer eq 'no_host') {
575: $badServerCache{$tryserver}=1;
576: }
577: }
578: }
579: return 'no_host';
580: }
581:
582: # ------------------------------------- Find the usernames behind a list of IDs
583:
584: sub idget {
585: my ($udom,@ids)=@_;
586: my %returnhash=();
587:
588: my $tryserver;
589: foreach $tryserver (keys %libserv) {
590: if ($hostdom{$tryserver} eq $udom) {
591: my $idlist=join('&',@ids);
592: $idlist=~tr/A-Z/a-z/;
593: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
594: my @answer=();
595: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
596: @answer=split(/\&/,$reply);
597: } ;
598: my $i;
599: for ($i=0;$i<=$#ids;$i++) {
600: if ($answer[$i]) {
601: $returnhash{$ids[$i]}=$answer[$i];
602: }
603: }
604: }
605: }
606: return %returnhash;
607: }
608:
609: # ------------------------------------- Find the IDs behind a list of usernames
610:
611: sub idrget {
612: my ($udom,@unames)=@_;
613: my %returnhash=();
614: foreach (@unames) {
615: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
616: }
617: return %returnhash;
618: }
619:
620: # ------------------------------- Store away a list of names and associated IDs
621:
622: sub idput {
623: my ($udom,%ids)=@_;
624: my %servers=();
625: foreach (keys %ids) {
626: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
627: my $uhom=&homeserver($_,$udom);
628: if ($uhom ne 'no_host') {
629: my $id=&escape($ids{$_});
630: $id=~tr/A-Z/a-z/;
631: my $unam=&escape($_);
632: if ($servers{$uhom}) {
633: $servers{$uhom}.='&'.$id.'='.$unam;
634: } else {
635: $servers{$uhom}=$id.'='.$unam;
636: }
637: }
638: }
639: foreach (keys %servers) {
640: &critical('idput:'.$udom.':'.$servers{$_},$_);
641: }
642: }
643:
644: # --------------------------------------------------- Assign a key to a student
645:
646: sub assign_access_key {
647: #
648: # a valid key looks like uname:udom#comments
649: # comments are being appended
650: #
651: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
652: $kdom=
653: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
654: $knum=
655: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
656: $cdom=
657: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
658: $cnum=
659: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
660: $udom=$env{'user.name'} unless (defined($udom));
661: $uname=$env{'user.domain'} unless (defined($uname));
662: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
663: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
664: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
665: # assigned to this person
666: # - this should not happen,
667: # unless something went wrong
668: # the first time around
669: # ready to assign
670: $logentry=$1.'; '.$logentry;
671: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
672: $kdom,$knum) eq 'ok') {
673: # key now belongs to user
674: my $envkey='key.'.$cdom.'_'.$cnum;
675: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
676: &appenv('environment.'.$envkey => $ckey);
677: return 'ok';
678: } else {
679: return
680: 'error: Count not permanently assign key, will need to be re-entered later.';
681: }
682: } else {
683: return 'error: Could not assign key, try again later.';
684: }
685: } elsif (!$existing{$ckey}) {
686: # the key does not exist
687: return 'error: The key does not exist';
688: } else {
689: # the key is somebody else's
690: return 'error: The key is already in use';
691: }
692: }
693:
694: # ------------------------------------------ put an additional comment on a key
695:
696: sub comment_access_key {
697: #
698: # a valid key looks like uname:udom#comments
699: # comments are being appended
700: #
701: my ($ckey,$cdom,$cnum,$logentry)=@_;
702: $cdom=
703: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
704: $cnum=
705: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
706: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
707: if ($existing{$ckey}) {
708: $existing{$ckey}.='; '.$logentry;
709: # ready to assign
710: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
711: $cdom,$cnum) eq 'ok') {
712: return 'ok';
713: } else {
714: return 'error: Count not store comment.';
715: }
716: } else {
717: # the key does not exist
718: return 'error: The key does not exist';
719: }
720: }
721:
722: # ------------------------------------------------------ Generate a set of keys
723:
724: sub generate_access_keys {
725: my ($number,$cdom,$cnum,$logentry)=@_;
726: $cdom=
727: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
728: $cnum=
729: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
730: unless (&allowed('mky',$cdom)) { return 0; }
731: unless (($cdom) && ($cnum)) { return 0; }
732: if ($number>10000) { return 0; }
733: sleep(2); # make sure don't get same seed twice
734: srand(time()^($$+($$<<15))); # from "Programming Perl"
735: my $total=0;
736: for (my $i=1;$i<=$number;$i++) {
737: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
738: sprintf("%lx",int(100000*rand)).'-'.
739: sprintf("%lx",int(100000*rand));
740: $newkey=~s/1/g/g; # folks mix up 1 and l
741: $newkey=~s/0/h/g; # and also 0 and O
742: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
743: if ($existing{$newkey}) {
744: $i--;
745: } else {
746: if (&put('accesskeys',
747: { $newkey => '# generated '.localtime().
748: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
749: '; '.$logentry },
750: $cdom,$cnum) eq 'ok') {
751: $total++;
752: }
753: }
754: }
755: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
756: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
757: return $total;
758: }
759:
760: # ------------------------------------------------------- Validate an accesskey
761:
762: sub validate_access_key {
763: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
764: $cdom=
765: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
766: $cnum=
767: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
768: $udom=$env{'user.domain'} unless (defined($udom));
769: $uname=$env{'user.name'} unless (defined($uname));
770: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
771: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
772: }
773:
774: # ------------------------------------- Find the section of student in a course
775: sub devalidate_getsection_cache {
776: my ($udom,$unam,$courseid)=@_;
777: $courseid=~s/\_/\//g;
778: $courseid=~s/^(\w)/\/$1/;
779: my $hashid="$udom:$unam:$courseid";
780: &devalidate_cache_new('getsection',$hashid);
781: }
782:
783: sub getsection {
784: my ($udom,$unam,$courseid)=@_;
785: my $cachetime=1800;
786: $courseid=~s/\_/\//g;
787: $courseid=~s/^(\w)/\/$1/;
788:
789: my $hashid="$udom:$unam:$courseid";
790: my ($result,$cached)=&is_cached_new('getsection',$hashid);
791: if (defined($cached)) { return $result; }
792:
793: my %Pending;
794: my %Expired;
795: #
796: # Each role can either have not started yet (pending), be active,
797: # or have expired.
798: #
799: # If there is an active role, we are done.
800: #
801: # If there is more than one role which has not started yet,
802: # choose the one which will start sooner
803: # If there is one role which has not started yet, return it.
804: #
805: # If there is more than one expired role, choose the one which ended last.
806: # If there is a role which has expired, return it.
807: #
808: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
809: &homeserver($unam,$udom)))) {
810: my ($key,$value)=split(/\=/,$_);
811: $key=&unescape($key);
812: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
813: my $section=$1;
814: if ($key eq $courseid.'_st') { $section=''; }
815: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
816: my $now=time;
817: if (defined($end) && $end && ($now > $end)) {
818: $Expired{$end}=$section;
819: next;
820: }
821: if (defined($start) && $start && ($now < $start)) {
822: $Pending{$start}=$section;
823: next;
824: }
825: return &do_cache_new('getsection',$hashid,$section,$cachetime);
826: }
827: #
828: # Presumedly there will be few matching roles from the above
829: # loop and the sorting time will be negligible.
830: if (scalar(keys(%Pending))) {
831: my ($time) = sort {$a <=> $b} keys(%Pending);
832: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
833: }
834: if (scalar(keys(%Expired))) {
835: my @sorted = sort {$a <=> $b} keys(%Expired);
836: my $time = pop(@sorted);
837: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
838: }
839: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
840: }
841:
842: sub save_cache {
843: my ($r)=@_;
844: if (! $r->is_initial_req()) { return DECLINED; }
845: &purge_remembered();
846: undef(%env);
847: return OK;
848: }
849:
850: my $to_remember=-1;
851: my %remembered;
852: my %accessed;
853: my $kicks=0;
854: my $hits=0;
855: sub devalidate_cache_new {
856: my ($name,$id,$debug) = @_;
857: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
858: $id=&escape($name.':'.$id);
859: $memcache->delete($id);
860: delete($remembered{$id});
861: delete($accessed{$id});
862: }
863:
864: sub is_cached_new {
865: my ($name,$id,$debug) = @_;
866: $id=&escape($name.':'.$id);
867: if (exists($remembered{$id})) {
868: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
869: $accessed{$id}=[&gettimeofday()];
870: $hits++;
871: return ($remembered{$id},1);
872: }
873: my $value = $memcache->get($id);
874: if (!(defined($value))) {
875: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
876: return (undef,undef);
877: }
878: if ($value eq '__undef__') {
879: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
880: $value=undef;
881: }
882: &make_room($id,$value,$debug);
883: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
884: return ($value,1);
885: }
886:
887: sub do_cache_new {
888: my ($name,$id,$value,$time,$debug) = @_;
889: $id=&escape($name.':'.$id);
890: my $setvalue=$value;
891: if (!defined($setvalue)) {
892: $setvalue='__undef__';
893: }
894: if (!defined($time) ) {
895: $time=600;
896: }
897: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
898: $memcache->set($id,$setvalue,$time);
899: # need to make a copy of $value
900: #&make_room($id,$value,$debug);
901: return $value;
902: }
903:
904: sub make_room {
905: my ($id,$value,$debug)=@_;
906: $remembered{$id}=$value;
907: if ($to_remember<0) { return; }
908: $accessed{$id}=[&gettimeofday()];
909: if (scalar(keys(%remembered)) <= $to_remember) { return; }
910: my $to_kick;
911: my $max_time=0;
912: foreach my $other (keys(%accessed)) {
913: if (&tv_interval($accessed{$other}) > $max_time) {
914: $to_kick=$other;
915: $max_time=&tv_interval($accessed{$other});
916: }
917: }
918: delete($remembered{$to_kick});
919: delete($accessed{$to_kick});
920: $kicks++;
921: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
922: return;
923: }
924:
925: sub purge_remembered {
926: #&logthis("Tossing ".scalar(keys(%remembered)));
927: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
928: undef(%remembered);
929: undef(%accessed);
930: }
931: # ------------------------------------- Read an entry from a user's environment
932:
933: sub userenvironment {
934: my ($udom,$unam,@what)=@_;
935: my %returnhash=();
936: my @answer=split(/\&/,
937: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
938: &homeserver($unam,$udom)));
939: my $i;
940: for ($i=0;$i<=$#what;$i++) {
941: $returnhash{$what[$i]}=&unescape($answer[$i]);
942: }
943: return %returnhash;
944: }
945:
946: # ---------------------------------------------------------- Get a studentphoto
947: sub studentphoto {
948: my ($udom,$unam,$ext) = @_;
949: my $home=&Apache::lonnet::homeserver($unam,$udom);
950: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext",$home);
951: my $url="/uploaded/$udom/$unam/internal/studentphoto.".$ext;
952: if ($ret ne 'ok') {
953: return '/adm/lonKaputt/lonlogo_broken.gif';
954: }
955: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
956: return $tokenurl;
957: }
958:
959: # -------------------------------------------------------------------- New chat
960:
961: sub chatsend {
962: my ($newentry,$anon)=@_;
963: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
964: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
965: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
966: &reply('chatsend:'.$cdom.':'.$cnum.':'.
967: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
968: &escape($newentry)),$chome);
969: }
970:
971: # ------------------------------------------ Find current version of a resource
972:
973: sub getversion {
974: my $fname=&clutter(shift);
975: unless ($fname=~/^\/res\//) { return -1; }
976: return ¤tversion(&filelocation('',$fname));
977: }
978:
979: sub currentversion {
980: my $fname=shift;
981: my ($result,$cached)=&is_cached_new('resversion',$fname);
982: if (defined($cached)) { return $result; }
983: my $author=$fname;
984: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
985: my ($udom,$uname)=split(/\//,$author);
986: my $home=homeserver($uname,$udom);
987: if ($home eq 'no_host') {
988: return -1;
989: }
990: my $answer=reply("currentversion:$fname",$home);
991: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
992: return -1;
993: }
994: return &do_cache_new('resversion',$fname,$answer,600);
995: }
996:
997: # ----------------------------- Subscribe to a resource, return URL if possible
998:
999: sub subscribe {
1000: my $fname=shift;
1001: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1002: $fname=~s/[\n\r]//g;
1003: my $author=$fname;
1004: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1005: my ($udom,$uname)=split(/\//,$author);
1006: my $home=homeserver($uname,$udom);
1007: if ($home eq 'no_host') {
1008: return 'not_found';
1009: }
1010: my $answer=reply("sub:$fname",$home);
1011: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1012: $answer.=' by '.$home;
1013: }
1014: return $answer;
1015: }
1016:
1017: # -------------------------------------------------------------- Replicate file
1018:
1019: sub repcopy {
1020: my $filename=shift;
1021: $filename=~s/\/+/\//g;
1022: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1023: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1024: if ($filename=~m|^/home/httpd/html/userfiles/| or
1025: $filename=~m -^/*(uploaded|editupload)/-) {
1026: return &repcopy_userfile($filename);
1027: }
1028: $filename=~s/[\n\r]//g;
1029: my $transname="$filename.in.transfer";
1030: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1031: my $remoteurl=subscribe($filename);
1032: if ($remoteurl =~ /^con_lost by/) {
1033: &logthis("Subscribe returned $remoteurl: $filename");
1034: return 'unavailable';
1035: } elsif ($remoteurl eq 'not_found') {
1036: #&logthis("Subscribe returned not_found: $filename");
1037: return 'not_found';
1038: } elsif ($remoteurl =~ /^rejected by/) {
1039: &logthis("Subscribe returned $remoteurl: $filename");
1040: return 'forbidden';
1041: } elsif ($remoteurl eq 'directory') {
1042: return 'ok';
1043: } else {
1044: my $author=$filename;
1045: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1046: my ($udom,$uname)=split(/\//,$author);
1047: my $home=homeserver($uname,$udom);
1048: unless ($home eq $perlvar{'lonHostID'}) {
1049: my @parts=split(/\//,$filename);
1050: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1051: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1052: &logthis("Malconfiguration for replication: $filename");
1053: return 'bad_request';
1054: }
1055: my $count;
1056: for ($count=5;$count<$#parts;$count++) {
1057: $path.="/$parts[$count]";
1058: if ((-e $path)!=1) {
1059: mkdir($path,0777);
1060: }
1061: }
1062: my $ua=new LWP::UserAgent;
1063: my $request=new HTTP::Request('GET',"$remoteurl");
1064: my $response=$ua->request($request,$transname);
1065: if ($response->is_error()) {
1066: unlink($transname);
1067: my $message=$response->status_line;
1068: &logthis("<font color=\"blue\">WARNING:"
1069: ." LWP get: $message: $filename</font>");
1070: return 'unavailable';
1071: } else {
1072: if ($remoteurl!~/\.meta$/) {
1073: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1074: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1075: if ($mresponse->is_error()) {
1076: unlink($filename.'.meta');
1077: &logthis(
1078: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1079: }
1080: }
1081: rename($transname,$filename);
1082: return 'ok';
1083: }
1084: }
1085: }
1086: }
1087:
1088: # ------------------------------------------------ Get server side include body
1089: sub ssi_body {
1090: my ($filelink,%form)=@_;
1091: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1092: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1093: }
1094: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1095: &ssi($filelink,%form));
1096: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs;
1097: $output=~s/^.*?\<body[^\>]*\>//si;
1098: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1099: return $output;
1100: }
1101:
1102: # --------------------------------------------------------- Server Side Include
1103:
1104: sub ssi {
1105:
1106: my ($fn,%form)=@_;
1107:
1108: my $ua=new LWP::UserAgent;
1109:
1110: my $request;
1111:
1112: if (%form) {
1113: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1114: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1115: } else {
1116: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1117: }
1118:
1119: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1120: my $response=$ua->request($request);
1121:
1122: return $response->content;
1123: }
1124:
1125: sub externalssi {
1126: my ($url)=@_;
1127: my $ua=new LWP::UserAgent;
1128: my $request=new HTTP::Request('GET',$url);
1129: my $response=$ua->request($request);
1130: return $response->content;
1131: }
1132:
1133: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1134:
1135: sub allowuploaded {
1136: my ($srcurl,$url)=@_;
1137: $url=&clutter(&declutter($url));
1138: my $dir=$url;
1139: $dir=~s/\/[^\/]+$//;
1140: my %httpref=();
1141: my $httpurl=&hreflocation('',$url);
1142: $httpref{'httpref.'.$httpurl}=$srcurl;
1143: &Apache::lonnet::appenv(%httpref);
1144: }
1145:
1146: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1147: # input: action, courseID, current domain, intended
1148: # path to file, source of file, instruction to parse file for objects,
1149: # ref to hash for embedded objects,
1150: # ref to hash for codebase of java objects.
1151: #
1152: # output: url to file (if action was uploaddoc),
1153: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1154: #
1155: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1156: # course.
1157: #
1158: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1159: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1160: # course's home server.
1161: #
1162: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1163: # be copied from $source (current location) to
1164: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1165: # and will then be copied to
1166: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1167: # course's home server.
1168: #
1169: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1170: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1171: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1172: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1173: # in course's home server.
1174: #
1175:
1176: sub process_coursefile {
1177: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1178: my $fetchresult;
1179: my $home=&homeserver($docuname,$docudom);
1180: if ($action eq 'propagate') {
1181: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1182: $home);
1183: } else {
1184: my $fpath = '';
1185: my $fname = $file;
1186: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1187: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1188: my $filepath = &build_filepath($fpath);
1189: if ($action eq 'copy') {
1190: if ($source eq '') {
1191: $fetchresult = 'no source file';
1192: return $fetchresult;
1193: } else {
1194: my $destination = $filepath.'/'.$fname;
1195: rename($source,$destination);
1196: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1197: $home);
1198: }
1199: } elsif ($action eq 'uploaddoc') {
1200: open(my $fh,'>'.$filepath.'/'.$fname);
1201: print $fh $env{'form.'.$source};
1202: close($fh);
1203: if ($parser eq 'parse') {
1204: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1205: unless ($parse_result eq 'ok') {
1206: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1207: }
1208: }
1209: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1210: $home);
1211: if ($fetchresult eq 'ok') {
1212: return '/uploaded/'.$fpath.'/'.$fname;
1213: } else {
1214: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1215: ' to host '.$home.': '.$fetchresult);
1216: return '/adm/notfound.html';
1217: }
1218: }
1219: }
1220: unless ( $fetchresult eq 'ok') {
1221: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1222: ' to host '.$home.': '.$fetchresult);
1223: }
1224: return $fetchresult;
1225: }
1226:
1227: sub build_filepath {
1228: my ($fpath) = @_;
1229: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1230: unless ($fpath eq '') {
1231: my @parts=split('/',$fpath);
1232: foreach my $part (@parts) {
1233: $filepath.= '/'.$part;
1234: if ((-e $filepath)!=1) {
1235: mkdir($filepath,0777);
1236: }
1237: }
1238: }
1239: return $filepath;
1240: }
1241:
1242: sub store_edited_file {
1243: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1244: my $file = $primary_url;
1245: $file =~ s#^/uploaded/$docudom/$docuname/##;
1246: my $fpath = '';
1247: my $fname = $file;
1248: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1249: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1250: my $filepath = &build_filepath($fpath);
1251: open(my $fh,'>'.$filepath.'/'.$fname);
1252: print $fh $content;
1253: close($fh);
1254: my $home=&homeserver($docuname,$docudom);
1255: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1256: $home);
1257: if ($$fetchresult eq 'ok') {
1258: return '/uploaded/'.$fpath.'/'.$fname;
1259: } else {
1260: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1261: ' to host '.$home.': '.$$fetchresult);
1262: return '/adm/notfound.html';
1263: }
1264: }
1265:
1266: sub clean_filename {
1267: my ($fname)=@_;
1268: # Replace Windows backslashes by forward slashes
1269: $fname=~s/\\/\//g;
1270: # Get rid of everything but the actual filename
1271: $fname=~s/^.*\/([^\/]+)$/$1/;
1272: # Replace spaces by underscores
1273: $fname=~s/\s+/\_/g;
1274: # Replace all other weird characters by nothing
1275: $fname=~s/[^\w\.\-]//g;
1276: # Replace all .\d. sequences with _\d. so they no longer look like version
1277: # numbers
1278: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1279: return $fname;
1280: }
1281:
1282: # --------------- Take an uploaded file and put it into the userfiles directory
1283: # input: name of form element, coursedoc=1 means this is for the course
1284: # output: url of file in userspace
1285:
1286:
1287: sub userfileupload {
1288: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase)=@_;
1289: if (!defined($subdir)) { $subdir='unknown'; }
1290: my $fname=$env{'form.'.$formname.'.filename'};
1291: $fname=&clean_filename($fname);
1292: # See if there is anything left
1293: unless ($fname) { return 'error: no uploaded file'; }
1294: chop($env{'form.'.$formname});
1295: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1296: my $now = time;
1297: my $filepath = 'tmp/helprequests/'.$now;
1298: my @parts=split(/\//,$filepath);
1299: my $fullpath = $perlvar{'lonDaemons'};
1300: for (my $i=0;$i<@parts;$i++) {
1301: $fullpath .= '/'.$parts[$i];
1302: if ((-e $fullpath)!=1) {
1303: mkdir($fullpath,0777);
1304: }
1305: }
1306: open(my $fh,'>'.$fullpath.'/'.$fname);
1307: print $fh $env{'form.'.$formname};
1308: close($fh);
1309: return $fullpath.'/'.$fname;
1310: }
1311: # Create the directory if not present
1312: $fname="$subdir/$fname";
1313: if ($coursedoc) {
1314: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1315: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1316: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1317: return &finishuserfileupload($docuname,$docudom,
1318: $formname,$fname,$parser,$allfiles,
1319: $codebase);
1320: } else {
1321: $fname=$env{'form.folder'}.'/'.$fname;
1322: return &process_coursefile('uploaddoc',$docuname,$docudom,
1323: $fname,$formname,$parser,
1324: $allfiles,$codebase);
1325: }
1326: } else {
1327: my $docuname=$env{'user.name'};
1328: my $docudom=$env{'user.domain'};
1329: return &finishuserfileupload($docuname,$docudom,$formname,
1330: $fname,$parser,$allfiles,$codebase);
1331: }
1332: }
1333:
1334: sub finishuserfileupload {
1335: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
1336: my $path=$docudom.'/'.$docuname.'/';
1337: my $filepath=$perlvar{'lonDocRoot'};
1338: my ($fnamepath,$file);
1339: $file=$fname;
1340: if ($fname=~m|/|) {
1341: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1342: $path.=$fnamepath.'/';
1343: }
1344: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1345: my $count;
1346: for ($count=4;$count<=$#parts;$count++) {
1347: $filepath.="/$parts[$count]";
1348: if ((-e $filepath)!=1) {
1349: mkdir($filepath,0777);
1350: }
1351: }
1352: # Save the file
1353: {
1354: open(FH,'>'.$filepath.'/'.$file);
1355: print FH $env{'form.'.$formname};
1356: close(FH);
1357: }
1358: if ($parser eq 'parse') {
1359: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1360: $codebase);
1361: unless ($parse_result eq 'ok') {
1362: &logthis('Failed to parse '.$filepath.$file.
1363: ' for embedded media: '.$parse_result);
1364: }
1365: }
1366: # Notify homeserver to grep it
1367: #
1368: my $docuhome=&homeserver($docuname,$docudom);
1369: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1370: if ($fetchresult eq 'ok') {
1371: #
1372: # Return the URL to it
1373: return '/uploaded/'.$path.$file;
1374: } else {
1375: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1376: ': '.$fetchresult);
1377: return '/adm/notfound.html';
1378: }
1379: }
1380:
1381: sub extract_embedded_items {
1382: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1383: my @state = ();
1384: my %javafiles = (
1385: codebase => '',
1386: code => '',
1387: archive => ''
1388: );
1389: my %mediafiles = (
1390: src => '',
1391: movie => '',
1392: );
1393: my $p;
1394: if ($content) {
1395: $p = HTML::LCParser->new($content);
1396: } else {
1397: $p = HTML::LCParser->new($filepath.'/'.$file);
1398: }
1399: while (my $t=$p->get_token()) {
1400: if ($t->[0] eq 'S') {
1401: my ($tagname, $attr) = ($t->[1],$t->[2]);
1402: push (@state, $tagname);
1403: if (lc($tagname) eq 'allow') {
1404: &add_filetype($allfiles,$attr->{'src'},'src');
1405: }
1406: if (lc($tagname) eq 'img') {
1407: &add_filetype($allfiles,$attr->{'src'},'src');
1408: }
1409: if (lc($tagname) eq 'script') {
1410: if ($attr->{'archive'} =~ /\.jar$/i) {
1411: &add_filetype($allfiles,$attr->{'archive'},'archive');
1412: } else {
1413: &add_filetype($allfiles,$attr->{'src'},'src');
1414: }
1415: }
1416: if (lc($tagname) eq 'link') {
1417: if (lc($attr->{'rel'}) eq 'stylesheet') {
1418: &add_filetype($allfiles,$attr->{'href'},'href');
1419: }
1420: }
1421: if (lc($tagname) eq 'object' ||
1422: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1423: foreach my $item (keys(%javafiles)) {
1424: $javafiles{$item} = '';
1425: }
1426: }
1427: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1428: my $name = lc($attr->{'name'});
1429: foreach my $item (keys(%javafiles)) {
1430: if ($name eq $item) {
1431: $javafiles{$item} = $attr->{'value'};
1432: last;
1433: }
1434: }
1435: foreach my $item (keys(%mediafiles)) {
1436: if ($name eq $item) {
1437: &add_filetype($allfiles, $attr->{'value'}, 'value');
1438: last;
1439: }
1440: }
1441: }
1442: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1443: foreach my $item (keys(%javafiles)) {
1444: if ($attr->{$item}) {
1445: $javafiles{$item} = $attr->{$item};
1446: last;
1447: }
1448: }
1449: foreach my $item (keys(%mediafiles)) {
1450: if ($attr->{$item}) {
1451: &add_filetype($allfiles,$attr->{$item},$item);
1452: last;
1453: }
1454: }
1455: }
1456: } elsif ($t->[0] eq 'E') {
1457: my ($tagname) = ($t->[1]);
1458: if ($javafiles{'codebase'} ne '') {
1459: $javafiles{'codebase'} .= '/';
1460: }
1461: if (lc($tagname) eq 'applet' ||
1462: lc($tagname) eq 'object' ||
1463: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1464: ) {
1465: foreach my $item (keys(%javafiles)) {
1466: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1467: my $file=$javafiles{'codebase'}.$javafiles{$item};
1468: &add_filetype($allfiles,$file,$item);
1469: }
1470: }
1471: }
1472: pop @state;
1473: }
1474: }
1475: return 'ok';
1476: }
1477:
1478: sub add_filetype {
1479: my ($allfiles,$file,$type)=@_;
1480: if (exists($allfiles->{$file})) {
1481: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1482: push(@{$allfiles->{$file}}, &escape($type));
1483: }
1484: } else {
1485: @{$allfiles->{$file}} = (&escape($type));
1486: }
1487: }
1488:
1489: sub removeuploadedurl {
1490: my ($url)=@_;
1491: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1492: return &removeuserfile($uname,$udom,$fname);
1493: }
1494:
1495: sub removeuserfile {
1496: my ($docuname,$docudom,$fname)=@_;
1497: my $home=&homeserver($docuname,$docudom);
1498: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1499: }
1500:
1501: sub mkdiruserfile {
1502: my ($docuname,$docudom,$dir)=@_;
1503: my $home=&homeserver($docuname,$docudom);
1504: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1505: }
1506:
1507: sub renameuserfile {
1508: my ($docuname,$docudom,$old,$new)=@_;
1509: my $home=&homeserver($docuname,$docudom);
1510: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1511: &escape("$new"),$home);
1512: }
1513:
1514: # ------------------------------------------------------------------------- Log
1515:
1516: sub log {
1517: my ($dom,$nam,$hom,$what)=@_;
1518: return critical("log:$dom:$nam:$what",$hom);
1519: }
1520:
1521: # ------------------------------------------------------------------ Course Log
1522: #
1523: # This routine flushes several buffers of non-mission-critical nature
1524: #
1525:
1526: sub flushcourselogs {
1527: &logthis('Flushing log buffers');
1528: #
1529: # course logs
1530: # This is a log of all transactions in a course, which can be used
1531: # for data mining purposes
1532: #
1533: # It also collects the courseid database, which lists last transaction
1534: # times and course titles for all courseids
1535: #
1536: my %courseidbuffer=();
1537: foreach (keys %courselogs) {
1538: my $crsid=$_;
1539: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1540: &escape($courselogs{$crsid}),
1541: $coursehombuf{$crsid}) eq 'ok') {
1542: delete $courselogs{$crsid};
1543: } else {
1544: &logthis('Failed to flush log buffer for '.$crsid);
1545: if (length($courselogs{$crsid})>40000) {
1546: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
1547: " exceeded maximum size, deleting.</font>");
1548: delete $courselogs{$crsid};
1549: }
1550: }
1551: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1552: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1553: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1554: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1555: } else {
1556: $courseidbuffer{$coursehombuf{$crsid}}=
1557: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1558: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1559: }
1560: }
1561: #
1562: # Write course id database (reverse lookup) to homeserver of courses
1563: # Is used in pickcourse
1564: #
1565: foreach (keys %courseidbuffer) {
1566: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1567: }
1568: #
1569: # File accesses
1570: # Writes to the dynamic metadata of resources to get hit counts, etc.
1571: #
1572: foreach my $entry (keys(%accesshash)) {
1573: if ($entry =~ /___count$/) {
1574: my ($dom,$name);
1575: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1576: if (! defined($dom) || $dom eq '' ||
1577: ! defined($name) || $name eq '') {
1578: my $cid = $env{'request.course.id'};
1579: $dom = $env{'request.'.$cid.'.domain'};
1580: $name = $env{'request.'.$cid.'.num'};
1581: }
1582: my $value = $accesshash{$entry};
1583: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1584: my %temphash=($url => $value);
1585: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1586: if ($result eq 'ok') {
1587: delete $accesshash{$entry};
1588: } elsif ($result eq 'unknown_cmd') {
1589: # Target server has old code running on it.
1590: my %temphash=($entry => $value);
1591: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1592: delete $accesshash{$entry};
1593: }
1594: }
1595: } else {
1596: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1597: my %temphash=($entry => $accesshash{$entry});
1598: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1599: delete $accesshash{$entry};
1600: }
1601: }
1602: }
1603: #
1604: # Roles
1605: # Reverse lookup of user roles for course faculty/staff and co-authorship
1606: #
1607: foreach (keys %userrolehash) {
1608: my $entry=$_;
1609: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1610: split(/\:/,$entry);
1611: if (&Apache::lonnet::put('nohist_userroles',
1612: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1613: $rudom,$runame) eq 'ok') {
1614: delete $userrolehash{$entry};
1615: }
1616: }
1617: #
1618: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1619: #
1620: my %domrolebuffer = ();
1621: foreach my $entry (keys %domainrolehash) {
1622: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1623: if ($domrolebuffer{$rudom}) {
1624: $domrolebuffer{$rudom}.='&'.&escape($entry).
1625: '='.&escape($domainrolehash{$entry});
1626: } else {
1627: $domrolebuffer{$rudom}.=&escape($entry).
1628: '='.&escape($domainrolehash{$entry});
1629: }
1630: delete $domainrolehash{$entry};
1631: }
1632: foreach my $dom (keys(%domrolebuffer)) {
1633: foreach my $tryserver (keys %libserv) {
1634: if ($hostdom{$tryserver} eq $dom) {
1635: unless (&reply('domroleput:'.$dom.':'.
1636: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1637: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1638: }
1639: }
1640: }
1641: }
1642: $dumpcount++;
1643: }
1644:
1645: sub courselog {
1646: my $what=shift;
1647: $what=time.':'.$what;
1648: unless ($env{'request.course.id'}) { return ''; }
1649: $coursedombuf{$env{'request.course.id'}}=
1650: $env{'course.'.$env{'request.course.id'}.'.domain'};
1651: $coursenumbuf{$env{'request.course.id'}}=
1652: $env{'course.'.$env{'request.course.id'}.'.num'};
1653: $coursehombuf{$env{'request.course.id'}}=
1654: $env{'course.'.$env{'request.course.id'}.'.home'};
1655: $coursedescrbuf{$env{'request.course.id'}}=
1656: $env{'course.'.$env{'request.course.id'}.'.description'};
1657: $courseinstcodebuf{$env{'request.course.id'}}=
1658: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1659: $courseownerbuf{$env{'request.course.id'}}=
1660: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1661: if (defined $courselogs{$env{'request.course.id'}}) {
1662: $courselogs{$env{'request.course.id'}}.='&'.$what;
1663: } else {
1664: $courselogs{$env{'request.course.id'}}.=$what;
1665: }
1666: if (length($courselogs{$env{'request.course.id'}})>4048) {
1667: &flushcourselogs();
1668: }
1669: }
1670:
1671: sub courseacclog {
1672: my $fnsymb=shift;
1673: unless ($env{'request.course.id'}) { return ''; }
1674: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1675: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1676: $what.=':POST';
1677: # FIXME: Probably ought to escape things....
1678: foreach (keys %env) {
1679: if ($_=~/^form\.(.*)/) {
1680: $what.=':'.$1.'='.$env{$_};
1681: }
1682: }
1683: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1684: # FIXME: We should not be depending on a form parameter that someone
1685: # editing lonsearchcat.pm might change in the future.
1686: if ($env{'form.phase'} eq 'course_search') {
1687: $what.= ':POST';
1688: # FIXME: Probably ought to escape things....
1689: foreach my $element ('courseexp','crsfulltext','crsrelated',
1690: 'crsdiscuss') {
1691: $what.=':'.$element.'='.$env{'form.'.$element};
1692: }
1693: }
1694: }
1695: &courselog($what);
1696: }
1697:
1698: sub countacc {
1699: my $url=&declutter(shift);
1700: return if (! defined($url) || $url eq '');
1701: unless ($env{'request.course.id'}) { return ''; }
1702: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1703: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1704: $accesshash{$key}++;
1705: }
1706:
1707: sub linklog {
1708: my ($from,$to)=@_;
1709: $from=&declutter($from);
1710: $to=&declutter($to);
1711: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1712: $accesshash{$to.'___'.$from.'___goto'}=1;
1713: }
1714:
1715: sub userrolelog {
1716: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1717: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
1718: ($trole=~/^in/) || ($trole=~/^cc/) ||
1719: ($trole=~/^ep/) || ($trole=~/^cr/) ||
1720: ($trole=~/^ta/)) {
1721: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1722: $userrolehash
1723: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1724: =$tend.':'.$tstart;
1725: }
1726: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
1727: ($trole=~/^li/) || ($trole=~/^li/) ||
1728: ($trole=~/^au/) || ($trole=~/^dg/) ||
1729: ($trole=~/^sc/)) {
1730: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1731: $domainrolehash
1732: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1733: = $tend.':'.$tstart;
1734: }
1735: }
1736:
1737: sub get_course_adv_roles {
1738: my $cid=shift;
1739: $cid=$env{'request.course.id'} unless (defined($cid));
1740: my %coursehash=&coursedescription($cid);
1741: my %nothide=();
1742: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1743: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1744: }
1745: my %returnhash=();
1746: my %dumphash=
1747: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1748: my $now=time;
1749: foreach (keys %dumphash) {
1750: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1751: if (($tstart) && ($tstart<0)) { next; }
1752: if (($tend) && ($tend<$now)) { next; }
1753: if (($tstart) && ($now<$tstart)) { next; }
1754: my ($role,$username,$domain,$section)=split(/\:/,$_);
1755: if ($username eq '' || $domain eq '') { next; }
1756: if ((&privileged($username,$domain)) &&
1757: (!$nothide{$username.':'.$domain})) { next; }
1758: if ($role eq 'cr') { next; }
1759: my $key=&plaintext($role);
1760: if ($role =~ /^cr/) {
1761: $key=(split('/',$role))[3];
1762: }
1763: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1764: if ($returnhash{$key}) {
1765: $returnhash{$key}.=','.$username.':'.$domain;
1766: } else {
1767: $returnhash{$key}=$username.':'.$domain;
1768: }
1769: }
1770: return %returnhash;
1771: }
1772:
1773: sub get_my_roles {
1774: my ($uname,$udom)=@_;
1775: unless (defined($uname)) { $uname=$env{'user.name'}; }
1776: unless (defined($udom)) { $udom=$env{'user.domain'}; }
1777: my %dumphash=
1778: &dump('nohist_userroles',$udom,$uname);
1779: my %returnhash=();
1780: my $now=time;
1781: foreach (keys %dumphash) {
1782: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1783: if (($tstart) && ($tstart<0)) { next; }
1784: if (($tend) && ($tend<$now)) { next; }
1785: if (($tstart) && ($now<$tstart)) { next; }
1786: my ($role,$username,$domain,$section)=split(/\:/,$_);
1787: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1788: }
1789: return %returnhash;
1790: }
1791:
1792: # ----------------------------------------------------- Frontpage Announcements
1793: #
1794: #
1795:
1796: sub postannounce {
1797: my ($server,$text)=@_;
1798: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1799: unless ($text=~/\w/) { $text=''; }
1800: return &reply('setannounce:'.&escape($text),$server);
1801: }
1802:
1803: sub getannounce {
1804:
1805: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1806: my $announcement='';
1807: while (<$fh>) { $announcement .=$_; }
1808: close($fh);
1809: if ($announcement=~/\w/) {
1810: return
1811: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1812: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1813: } else {
1814: return '';
1815: }
1816: } else {
1817: return '';
1818: }
1819: }
1820:
1821: # ---------------------------------------------------------- Course ID routines
1822: # Deal with domain's nohist_courseid.db files
1823: #
1824:
1825: sub courseidput {
1826: my ($domain,$what,$coursehome)=@_;
1827: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1828: }
1829:
1830: sub courseiddump {
1831: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref)=@_;
1832: my %returnhash=();
1833: unless ($domfilter) { $domfilter=''; }
1834: foreach my $tryserver (keys %libserv) {
1835: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1836: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1837: foreach (
1838: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1839: $sincefilter.':'.&escape($descfilter).':'.
1840: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter),
1841: $tryserver))) {
1842: my ($key,$value)=split(/\=/,$_);
1843: if (($key) && ($value)) {
1844: $returnhash{&unescape($key)}=$value;
1845: }
1846: }
1847: }
1848: }
1849: }
1850: return %returnhash;
1851: }
1852:
1853: # ---------------------------------------------------------- DC e-mail
1854:
1855: sub dcmailput {
1856: my ($domain,$msgid,$contents,$server)=@_;
1857: my $status = &Apache::lonnet::critical(
1858: 'dcmailput:'.$domain.':'.&Apache::lonnet::escape($msgid).'='.
1859: &Apache::lonnet::escape($$contents{$server}),$server);
1860: return $status;
1861: }
1862:
1863: sub dcmaildump {
1864: my ($dom,$startdate,$enddate,$senders) = @_;
1865: my %returnhash=();
1866: foreach my $tryserver (keys(%libserv)) {
1867: if ($hostdom{$tryserver} eq $dom) {
1868: %{$returnhash{$tryserver}}=();
1869: my $cmd='dcmaildump:'.$dom.':'.
1870: &escape($startdate).':'.&escape($enddate).':';
1871: my @esc_senders=map { &escape($_)} @$senders;
1872: $cmd.=&escape(join('&',@esc_senders));
1873: foreach (split(/\&/,&reply($cmd,$tryserver))) {
1874: my ($key,$value) = split(/\=/,$_);
1875: if (($key) && ($value)) {
1876: $returnhash{$tryserver}{&unescape($key)} = &unescape($value);
1877: }
1878: }
1879: }
1880: }
1881: return %returnhash;
1882: }
1883: # ---------------------------------------------------------- Domain roles
1884:
1885: sub get_domain_roles {
1886: my ($dom,$roles,$startdate,$enddate)=@_;
1887: if (undef($startdate) || $startdate eq '') {
1888: $startdate = '.';
1889: }
1890: if (undef($enddate) || $enddate eq '') {
1891: $enddate = '.';
1892: }
1893: my $rolelist = join(':',@{$roles});
1894: my %personnel = ();
1895: foreach my $tryserver (keys(%libserv)) {
1896: if ($hostdom{$tryserver} eq $dom) {
1897: %{$personnel{$tryserver}}=();
1898: foreach (
1899: split(/\&/,&reply('domrolesdump:'.$dom.':'.
1900: &escape($startdate).':'.&escape($enddate).':'.
1901: &escape($rolelist), $tryserver))) {
1902: my($key,$value) = split(/\=/,$_);
1903: if (($key) && ($value)) {
1904: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
1905: }
1906: }
1907: }
1908: }
1909: return %personnel;
1910: }
1911:
1912: # ----------------------------------------------------------- Check out an item
1913:
1914: sub get_first_access {
1915: my ($type,$argsymb)=@_;
1916: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1917: if ($argsymb) { $symb=$argsymb; }
1918: my ($map,$id,$res)=&decode_symb($symb);
1919: if ($type eq 'map') {
1920: $res=&symbread($map);
1921: } else {
1922: $res=$symb;
1923: }
1924: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
1925: return $times{"$courseid\0$res"};
1926: }
1927:
1928: sub set_first_access {
1929: my ($type)=@_;
1930: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1931: my ($map,$id,$res)=&decode_symb($symb);
1932: if ($type eq 'map') {
1933: $res=&symbread($map);
1934: } else {
1935: $res=$symb;
1936: }
1937: my $firstaccess=&get_first_access($type,$symb);
1938: if (!$firstaccess) {
1939: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
1940: }
1941: return 'already_set';
1942: }
1943:
1944: sub checkout {
1945: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1946: my $now=time;
1947: my $lonhost=$perlvar{'lonHostID'};
1948: my $infostr=&escape(
1949: 'CHECKOUTTOKEN&'.
1950: $tuname.'&'.
1951: $tudom.'&'.
1952: $tcrsid.'&'.
1953: $symb.'&'.
1954: $now.'&'.$ENV{'REMOTE_ADDR'});
1955: my $token=&reply('tmpput:'.$infostr,$lonhost);
1956: if ($token=~/^error\:/) {
1957: &logthis("<font color=\"blue\">WARNING: ".
1958: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1959: "</font>");
1960: return '';
1961: }
1962:
1963: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1964: $token=~tr/a-z/A-Z/;
1965:
1966: my %infohash=('resource.0.outtoken' => $token,
1967: 'resource.0.checkouttime' => $now,
1968: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1969:
1970: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1971: return '';
1972: } else {
1973: &logthis("<font color=\"blue\">WARNING: ".
1974: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1975: "</font>");
1976: }
1977:
1978: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1979: &escape('Checkout '.$infostr.' - '.
1980: $token)) ne 'ok') {
1981: return '';
1982: } else {
1983: &logthis("<font color=\"blue\">WARNING: ".
1984: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1985: "</font>");
1986: }
1987: return $token;
1988: }
1989:
1990: # ------------------------------------------------------------ Check in an item
1991:
1992: sub checkin {
1993: my $token=shift;
1994: my $now=time;
1995: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1996: $lonhost=~tr/A-Z/a-z/;
1997: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
1998: $dtoken=~s/\W/\_/g;
1999: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2000: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2001:
2002: unless (($tuname) && ($tudom)) {
2003: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2004: return '';
2005: }
2006:
2007: unless (&allowed('mgr',$tcrsid)) {
2008: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2009: $env{'user.name'}.' - '.$env{'user.domain'});
2010: return '';
2011: }
2012:
2013: my %infohash=('resource.0.intoken' => $token,
2014: 'resource.0.checkintime' => $now,
2015: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2016:
2017: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2018: return '';
2019: }
2020:
2021: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2022: &escape('Checkin - '.$token)) ne 'ok') {
2023: return '';
2024: }
2025:
2026: return ($symb,$tuname,$tudom,$tcrsid);
2027: }
2028:
2029: # --------------------------------------------- Set Expire Date for Spreadsheet
2030:
2031: sub expirespread {
2032: my ($uname,$udom,$stype,$usymb)=@_;
2033: my $cid=$env{'request.course.id'};
2034: if ($cid) {
2035: my $now=time;
2036: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2037: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2038: $env{'course.'.$cid.'.num'}.
2039: ':nohist_expirationdates:'.
2040: &escape($key).'='.$now,
2041: $env{'course.'.$cid.'.home'})
2042: }
2043: return 'ok';
2044: }
2045:
2046: # ----------------------------------------------------- Devalidate Spreadsheets
2047:
2048: sub devalidate {
2049: my ($symb,$uname,$udom)=@_;
2050: my $cid=$env{'request.course.id'};
2051: if ($cid) {
2052: # delete the stored spreadsheets for
2053: # - the student level sheet of this user in course's homespace
2054: # - the assessment level sheet for this resource
2055: # for this user in user's homespace
2056: # - current conditional state info
2057: my $key=$uname.':'.$udom.':';
2058: my $status=
2059: &del('nohist_calculatedsheets',
2060: [$key.'studentcalc:'],
2061: $env{'course.'.$cid.'.domain'},
2062: $env{'course.'.$cid.'.num'})
2063: .' '.
2064: &del('nohist_calculatedsheets_'.$cid,
2065: [$key.'assesscalc:'.$symb],$udom,$uname);
2066: unless ($status eq 'ok ok') {
2067: &logthis('Could not devalidate spreadsheet '.
2068: $uname.' at '.$udom.' for '.
2069: $symb.': '.$status);
2070: }
2071: &delenv('user.state.'.$cid);
2072: }
2073: }
2074:
2075: sub get_scalar {
2076: my ($string,$end) = @_;
2077: my $value;
2078: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2079: $value = $1;
2080: } elsif ($$string =~ s/^([^&]*?)&//) {
2081: $value = $1;
2082: }
2083: return &unescape($value);
2084: }
2085:
2086: sub array2str {
2087: my (@array) = @_;
2088: my $result=&arrayref2str(\@array);
2089: $result=~s/^__ARRAY_REF__//;
2090: $result=~s/__END_ARRAY_REF__$//;
2091: return $result;
2092: }
2093:
2094: sub arrayref2str {
2095: my ($arrayref) = @_;
2096: my $result='__ARRAY_REF__';
2097: foreach my $elem (@$arrayref) {
2098: if(ref($elem) eq 'ARRAY') {
2099: $result.=&arrayref2str($elem).'&';
2100: } elsif(ref($elem) eq 'HASH') {
2101: $result.=&hashref2str($elem).'&';
2102: } elsif(ref($elem)) {
2103: #print("Got a ref of ".(ref($elem))." skipping.");
2104: } else {
2105: $result.=&escape($elem).'&';
2106: }
2107: }
2108: $result=~s/\&$//;
2109: $result .= '__END_ARRAY_REF__';
2110: return $result;
2111: }
2112:
2113: sub hash2str {
2114: my (%hash) = @_;
2115: my $result=&hashref2str(\%hash);
2116: $result=~s/^__HASH_REF__//;
2117: $result=~s/__END_HASH_REF__$//;
2118: return $result;
2119: }
2120:
2121: sub hashref2str {
2122: my ($hashref)=@_;
2123: my $result='__HASH_REF__';
2124: foreach (sort(keys(%$hashref))) {
2125: if (ref($_) eq 'ARRAY') {
2126: $result.=&arrayref2str($_).'=';
2127: } elsif (ref($_) eq 'HASH') {
2128: $result.=&hashref2str($_).'=';
2129: } elsif (ref($_)) {
2130: $result.='=';
2131: #print("Got a ref of ".(ref($_))." skipping.");
2132: } else {
2133: if ($_) {$result.=&escape($_).'=';} else { last; }
2134: }
2135:
2136: if(ref($hashref->{$_}) eq 'ARRAY') {
2137: $result.=&arrayref2str($hashref->{$_}).'&';
2138: } elsif(ref($hashref->{$_}) eq 'HASH') {
2139: $result.=&hashref2str($hashref->{$_}).'&';
2140: } elsif(ref($hashref->{$_})) {
2141: $result.='&';
2142: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
2143: } else {
2144: $result.=&escape($hashref->{$_}).'&';
2145: }
2146: }
2147: $result=~s/\&$//;
2148: $result .= '__END_HASH_REF__';
2149: return $result;
2150: }
2151:
2152: sub str2hash {
2153: my ($string)=@_;
2154: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2155: return %$hash;
2156: }
2157:
2158: sub str2hashref {
2159: my ($string) = @_;
2160:
2161: my %hash;
2162:
2163: if($string !~ /^__HASH_REF__/) {
2164: if (! ($string eq '' || !defined($string))) {
2165: $hash{'error'}='Not hash reference';
2166: }
2167: return (\%hash, $string);
2168: }
2169:
2170: $string =~ s/^__HASH_REF__//;
2171:
2172: while($string !~ /^__END_HASH_REF__/) {
2173: #key
2174: my $key='';
2175: if($string =~ /^__HASH_REF__/) {
2176: ($key, $string)=&str2hashref($string);
2177: if(defined($key->{'error'})) {
2178: $hash{'error'}='Bad data';
2179: return (\%hash, $string);
2180: }
2181: } elsif($string =~ /^__ARRAY_REF__/) {
2182: ($key, $string)=&str2arrayref($string);
2183: if($key->[0] eq 'Array reference error') {
2184: $hash{'error'}='Bad data';
2185: return (\%hash, $string);
2186: }
2187: } else {
2188: $string =~ s/^(.*?)=//;
2189: $key=&unescape($1);
2190: }
2191: $string =~ s/^=//;
2192:
2193: #value
2194: my $value='';
2195: if($string =~ /^__HASH_REF__/) {
2196: ($value, $string)=&str2hashref($string);
2197: if(defined($value->{'error'})) {
2198: $hash{'error'}='Bad data';
2199: return (\%hash, $string);
2200: }
2201: } elsif($string =~ /^__ARRAY_REF__/) {
2202: ($value, $string)=&str2arrayref($string);
2203: if($value->[0] eq 'Array reference error') {
2204: $hash{'error'}='Bad data';
2205: return (\%hash, $string);
2206: }
2207: } else {
2208: $value=&get_scalar(\$string,'__END_HASH_REF__');
2209: }
2210: $string =~ s/^&//;
2211:
2212: $hash{$key}=$value;
2213: }
2214:
2215: $string =~ s/^__END_HASH_REF__//;
2216:
2217: return (\%hash, $string);
2218: }
2219:
2220: sub str2array {
2221: my ($string)=@_;
2222: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2223: return @$array;
2224: }
2225:
2226: sub str2arrayref {
2227: my ($string) = @_;
2228: my @array;
2229:
2230: if($string !~ /^__ARRAY_REF__/) {
2231: if (! ($string eq '' || !defined($string))) {
2232: $array[0]='Array reference error';
2233: }
2234: return (\@array, $string);
2235: }
2236:
2237: $string =~ s/^__ARRAY_REF__//;
2238:
2239: while($string !~ /^__END_ARRAY_REF__/) {
2240: my $value='';
2241: if($string =~ /^__HASH_REF__/) {
2242: ($value, $string)=&str2hashref($string);
2243: if(defined($value->{'error'})) {
2244: $array[0] ='Array reference error';
2245: return (\@array, $string);
2246: }
2247: } elsif($string =~ /^__ARRAY_REF__/) {
2248: ($value, $string)=&str2arrayref($string);
2249: if($value->[0] eq 'Array reference error') {
2250: $array[0] ='Array reference error';
2251: return (\@array, $string);
2252: }
2253: } else {
2254: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2255: }
2256: $string =~ s/^&//;
2257:
2258: push(@array, $value);
2259: }
2260:
2261: $string =~ s/^__END_ARRAY_REF__//;
2262:
2263: return (\@array, $string);
2264: }
2265:
2266: # -------------------------------------------------------------------Temp Store
2267:
2268: sub tmpreset {
2269: my ($symb,$namespace,$domain,$stuname) = @_;
2270: if (!$symb) {
2271: $symb=&symbread();
2272: if (!$symb) { $symb= $env{'request.url'}; }
2273: }
2274: $symb=escape($symb);
2275:
2276: if (!$namespace) { $namespace=$env{'request.state'}; }
2277: $namespace=~s/\//\_/g;
2278: $namespace=~s/\W//g;
2279:
2280: if (!$domain) { $domain=$env{'user.domain'}; }
2281: if (!$stuname) { $stuname=$env{'user.name'}; }
2282: if ($domain eq 'public' && $stuname eq 'public') {
2283: $stuname=$ENV{'REMOTE_ADDR'};
2284: }
2285: my $path=$perlvar{'lonDaemons'}.'/tmp';
2286: my %hash;
2287: if (tie(%hash,'GDBM_File',
2288: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2289: &GDBM_WRCREAT(),0640)) {
2290: foreach my $key (keys %hash) {
2291: if ($key=~ /:$symb/) {
2292: delete($hash{$key});
2293: }
2294: }
2295: }
2296: }
2297:
2298: sub tmpstore {
2299: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2300:
2301: if (!$symb) {
2302: $symb=&symbread();
2303: if (!$symb) { $symb= $env{'request.url'}; }
2304: }
2305: $symb=escape($symb);
2306:
2307: if (!$namespace) {
2308: # I don't think we would ever want to store this for a course.
2309: # it seems this will only be used if we don't have a course.
2310: #$namespace=$env{'request.course.id'};
2311: #if (!$namespace) {
2312: $namespace=$env{'request.state'};
2313: #}
2314: }
2315: $namespace=~s/\//\_/g;
2316: $namespace=~s/\W//g;
2317: if (!$domain) { $domain=$env{'user.domain'}; }
2318: if (!$stuname) { $stuname=$env{'user.name'}; }
2319: if ($domain eq 'public' && $stuname eq 'public') {
2320: $stuname=$ENV{'REMOTE_ADDR'};
2321: }
2322: my $now=time;
2323: my %hash;
2324: my $path=$perlvar{'lonDaemons'}.'/tmp';
2325: if (tie(%hash,'GDBM_File',
2326: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2327: &GDBM_WRCREAT(),0640)) {
2328: $hash{"version:$symb"}++;
2329: my $version=$hash{"version:$symb"};
2330: my $allkeys='';
2331: foreach my $key (keys(%$storehash)) {
2332: $allkeys.=$key.':';
2333: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2334: }
2335: $hash{"$version:$symb:timestamp"}=$now;
2336: $allkeys.='timestamp';
2337: $hash{"$version:keys:$symb"}=$allkeys;
2338: if (untie(%hash)) {
2339: return 'ok';
2340: } else {
2341: return "error:$!";
2342: }
2343: } else {
2344: return "error:$!";
2345: }
2346: }
2347:
2348: # -----------------------------------------------------------------Temp Restore
2349:
2350: sub tmprestore {
2351: my ($symb,$namespace,$domain,$stuname) = @_;
2352:
2353: if (!$symb) {
2354: $symb=&symbread();
2355: if (!$symb) { $symb= $env{'request.url'}; }
2356: }
2357: $symb=escape($symb);
2358:
2359: if (!$namespace) { $namespace=$env{'request.state'}; }
2360:
2361: if (!$domain) { $domain=$env{'user.domain'}; }
2362: if (!$stuname) { $stuname=$env{'user.name'}; }
2363: if ($domain eq 'public' && $stuname eq 'public') {
2364: $stuname=$ENV{'REMOTE_ADDR'};
2365: }
2366: my %returnhash;
2367: $namespace=~s/\//\_/g;
2368: $namespace=~s/\W//g;
2369: my %hash;
2370: my $path=$perlvar{'lonDaemons'}.'/tmp';
2371: if (tie(%hash,'GDBM_File',
2372: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2373: &GDBM_READER(),0640)) {
2374: my $version=$hash{"version:$symb"};
2375: $returnhash{'version'}=$version;
2376: my $scope;
2377: for ($scope=1;$scope<=$version;$scope++) {
2378: my $vkeys=$hash{"$scope:keys:$symb"};
2379: my @keys=split(/:/,$vkeys);
2380: my $key;
2381: $returnhash{"$scope:keys"}=$vkeys;
2382: foreach $key (@keys) {
2383: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2384: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2385: }
2386: }
2387: if (!(untie(%hash))) {
2388: return "error:$!";
2389: }
2390: } else {
2391: return "error:$!";
2392: }
2393: return %returnhash;
2394: }
2395:
2396: # ----------------------------------------------------------------------- Store
2397:
2398: sub store {
2399: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2400: my $home='';
2401:
2402: if ($stuname) { $home=&homeserver($stuname,$domain); }
2403:
2404: $symb=&symbclean($symb);
2405: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2406:
2407: if (!$domain) { $domain=$env{'user.domain'}; }
2408: if (!$stuname) { $stuname=$env{'user.name'}; }
2409:
2410: &devalidate($symb,$stuname,$domain);
2411:
2412: $symb=escape($symb);
2413: if (!$namespace) {
2414: unless ($namespace=$env{'request.course.id'}) {
2415: return '';
2416: }
2417: }
2418: if (!$home) { $home=$env{'user.home'}; }
2419:
2420: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2421: $$storehash{'host'}=$perlvar{'lonHostID'};
2422:
2423: my $namevalue='';
2424: foreach (keys %$storehash) {
2425: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2426: }
2427: $namevalue=~s/\&$//;
2428: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2429: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2430: }
2431:
2432: # -------------------------------------------------------------- Critical Store
2433:
2434: sub cstore {
2435: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2436: my $home='';
2437:
2438: if ($stuname) { $home=&homeserver($stuname,$domain); }
2439:
2440: $symb=&symbclean($symb);
2441: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2442:
2443: if (!$domain) { $domain=$env{'user.domain'}; }
2444: if (!$stuname) { $stuname=$env{'user.name'}; }
2445:
2446: &devalidate($symb,$stuname,$domain);
2447:
2448: $symb=escape($symb);
2449: if (!$namespace) {
2450: unless ($namespace=$env{'request.course.id'}) {
2451: return '';
2452: }
2453: }
2454: if (!$home) { $home=$env{'user.home'}; }
2455:
2456: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2457: $$storehash{'host'}=$perlvar{'lonHostID'};
2458:
2459: my $namevalue='';
2460: foreach (keys %$storehash) {
2461: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2462: }
2463: $namevalue=~s/\&$//;
2464: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2465: return critical
2466: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2467: }
2468:
2469: # --------------------------------------------------------------------- Restore
2470:
2471: sub restore {
2472: my ($symb,$namespace,$domain,$stuname) = @_;
2473: my $home='';
2474:
2475: if ($stuname) { $home=&homeserver($stuname,$domain); }
2476:
2477: if (!$symb) {
2478: unless ($symb=escape(&symbread())) { return ''; }
2479: } else {
2480: $symb=&escape(&symbclean($symb));
2481: }
2482: if (!$namespace) {
2483: unless ($namespace=$env{'request.course.id'}) {
2484: return '';
2485: }
2486: }
2487: if (!$domain) { $domain=$env{'user.domain'}; }
2488: if (!$stuname) { $stuname=$env{'user.name'}; }
2489: if (!$home) { $home=$env{'user.home'}; }
2490: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2491:
2492: my %returnhash=();
2493: foreach (split(/\&/,$answer)) {
2494: my ($name,$value)=split(/\=/,$_);
2495: $returnhash{&unescape($name)}=&thaw_unescape($value);
2496: }
2497: my $version;
2498: for ($version=1;$version<=$returnhash{'version'};$version++) {
2499: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2500: $returnhash{$_}=$returnhash{$version.':'.$_};
2501: }
2502: }
2503: return %returnhash;
2504: }
2505:
2506: # ---------------------------------------------------------- Course Description
2507:
2508: sub coursedescription {
2509: my $courseid=shift;
2510: $courseid=~s/^\///;
2511: $courseid=~s/\_/\//g;
2512: my ($cdomain,$cnum)=split(/\//,$courseid);
2513: my $chome=&homeserver($cnum,$cdomain);
2514: my $normalid=$cdomain.'_'.$cnum;
2515: # need to always cache even if we get errors otherwise we keep
2516: # trying and trying and trying to get the course description.
2517: my %envhash=();
2518: my %returnhash=();
2519: $envhash{'course.'.$normalid.'.last_cache'}=time;
2520: if ($chome ne 'no_host') {
2521: %returnhash=&dump('environment',$cdomain,$cnum);
2522: if (!exists($returnhash{'con_lost'})) {
2523: $returnhash{'home'}= $chome;
2524: $returnhash{'domain'} = $cdomain;
2525: $returnhash{'num'} = $cnum;
2526: while (my ($name,$value) = each %returnhash) {
2527: $envhash{'course.'.$normalid.'.'.$name}=$value;
2528: }
2529: $returnhash{'url'}=&clutter($returnhash{'url'});
2530: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2531: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2532: $envhash{'course.'.$normalid.'.home'}=$chome;
2533: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2534: $envhash{'course.'.$normalid.'.num'}=$cnum;
2535: }
2536: }
2537: &appenv(%envhash);
2538: return %returnhash;
2539: }
2540:
2541: # -------------------------------------------------See if a user is privileged
2542:
2543: sub privileged {
2544: my ($username,$domain)=@_;
2545: my $rolesdump=&reply("dump:$domain:$username:roles",
2546: &homeserver($username,$domain));
2547: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2548: my $now=time;
2549: if ($rolesdump ne '') {
2550: foreach (split(/&/,$rolesdump)) {
2551: if ($_!~/^rolesdef_/) {
2552: my ($area,$role)=split(/=/,$_);
2553: $area=~s/\_\w\w$//;
2554: my ($trole,$tend,$tstart)=split(/_/,$role);
2555: if (($trole eq 'dc') || ($trole eq 'su')) {
2556: my $active=1;
2557: if ($tend) {
2558: if ($tend<$now) { $active=0; }
2559: }
2560: if ($tstart) {
2561: if ($tstart>$now) { $active=0; }
2562: }
2563: if ($active) { return 1; }
2564: }
2565: }
2566: }
2567: }
2568: return 0;
2569: }
2570:
2571: # -------------------------------------------------------- Get user privileges
2572:
2573: sub rolesinit {
2574: my ($domain,$username,$authhost)=@_;
2575: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2576: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2577: my %allroles=();
2578: my %allgroups=();
2579: my $now=time;
2580: my $userroles="user.login.time=$now\n";
2581: my $group_privs;
2582:
2583: if ($rolesdump ne '') {
2584: foreach (split(/&/,$rolesdump)) {
2585: if ($_!~/^rolesdef_/) {
2586: my ($area,$role)=split(/=/,$_);
2587: $area=~s/\_\w\w$//;
2588: my ($trole,$tend,$tstart,$group_privs);
2589: if ($role=~/^cr/) {
2590: if ($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|) {
2591: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2592: ($tend,$tstart)=split('_',$trest);
2593: } else {
2594: $trole=$role;
2595: }
2596: } elsif ($role =~ m|^gr/|) {
2597: ($trole,$tend,$tstart) = split(/_/,$role);
2598: ($trole,$group_privs) = split(/\//,$trole);
2599: $group_privs = &unescape($group_privs);
2600: } else {
2601: ($trole,$tend,$tstart)=split(/_/,$role);
2602: }
2603: $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username);
2604: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2605: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2606: if (($area ne '') && ($trole ne '')) {
2607: my $spec=$trole.'.'.$area;
2608: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2609: if ($trole =~ /^cr\//) {
2610: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2611: } elsif ($trole eq 'gr') {
2612: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
2613: } else {
2614: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2615: }
2616: }
2617: }
2618: }
2619: my ($author,$adv) = &set_userprivs(\$userroles,\%allroles,\%allgroups);
2620: $userroles.='user.adv='.$adv."\n".
2621: 'user.author='.$author."\n";
2622: $env{'user.adv'}=$adv;
2623: }
2624: return $userroles;
2625: }
2626:
2627: sub set_arearole {
2628: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2629: # log the associated role with the area
2630: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2631: return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
2632: }
2633:
2634: sub custom_roleprivs {
2635: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2636: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2637: my $homsvr=homeserver($rauthor,$rdomain);
2638: if ($hostname{$homsvr} ne '') {
2639: my ($rdummy,$roledef)=
2640: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2641: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2642: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2643: if (defined($syspriv)) {
2644: $$allroles{'cm./'}.=':'.$syspriv;
2645: $$allroles{$spec.'./'}.=':'.$syspriv;
2646: }
2647: if ($tdomain ne '') {
2648: if (defined($dompriv)) {
2649: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2650: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2651: }
2652: if (($trest ne '') && (defined($coursepriv))) {
2653: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2654: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2655: }
2656: }
2657: }
2658: }
2659: }
2660:
2661: sub group_roleprivs {
2662: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
2663: my $access = 1;
2664: my $now = time;
2665: if (($tend!=0) && ($tend<$now)) { $access = 0; }
2666: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
2667: if ($access) {
2668: my ($course,$group) = ($area =~ m|(/\w+/\w+)/([^/]+)$|);
2669: $$allgroups{$course}{$group} .=':'.$group_privs;
2670: }
2671: }
2672:
2673: sub standard_roleprivs {
2674: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2675: if (defined($pr{$trole.':s'})) {
2676: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2677: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2678: }
2679: if ($tdomain ne '') {
2680: if (defined($pr{$trole.':d'})) {
2681: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2682: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2683: }
2684: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2685: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2686: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2687: }
2688: }
2689: }
2690:
2691: sub set_userprivs {
2692: my ($userroles,$allroles,$allgroups) = @_;
2693: my $author=0;
2694: my $adv=0;
2695: my %grouproles = ();
2696: my %groups_checked = ();
2697: if (keys(%{$allgroups}) > 0) {
2698: foreach my $role (keys %{$allroles}) {
2699: my ($trole,$area);
2700: if ($role =~ m|^(\w+)\.(/\w+/\w+)|) {
2701: $trole = $1;
2702: $area = $2;
2703: unless ($groups_checked{$area}) {
2704: $groups_checked{$area} = 1;
2705: if (exists($$allgroups{$area})) {
2706: foreach my $group (keys(%{$$allgroups{$area}})) {
2707: my $spec = $trole.'.'.$area;
2708: $grouproles{$spec.'.'.$area.'/'.$group} =
2709: $$allgroups{$area}{$group};
2710: }
2711: }
2712: }
2713: }
2714: }
2715: }
2716: foreach (keys(%grouproles)) {
2717: $$allroles{$_} = $grouproles{$_};
2718: }
2719: foreach (keys %{$allroles}) {
2720: my %thesepriv=();
2721: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2722: foreach (split(/:/,$$allroles{$_})) {
2723: if ($_ ne '') {
2724: my ($privilege,$restrictions)=split(/&/,$_);
2725: if ($restrictions eq '') {
2726: $thesepriv{$privilege}='F';
2727: } elsif ($thesepriv{$privilege} ne 'F') {
2728: $thesepriv{$privilege}.=$restrictions;
2729: }
2730: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2731: }
2732: }
2733: my $thesestr='';
2734: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2735: $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
2736: }
2737: return ($author,$adv);
2738: }
2739:
2740: # --------------------------------------------------------------- get interface
2741:
2742: sub get {
2743: my ($namespace,$storearr,$udomain,$uname)=@_;
2744: my $items='';
2745: foreach (@$storearr) {
2746: $items.=escape($_).'&';
2747: }
2748: $items=~s/\&$//;
2749: if (!$udomain) { $udomain=$env{'user.domain'}; }
2750: if (!$uname) { $uname=$env{'user.name'}; }
2751: my $uhome=&homeserver($uname,$udomain);
2752:
2753: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2754: my @pairs=split(/\&/,$rep);
2755: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2756: return @pairs;
2757: }
2758: my %returnhash=();
2759: my $i=0;
2760: foreach (@$storearr) {
2761: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2762: $i++;
2763: }
2764: return %returnhash;
2765: }
2766:
2767: # --------------------------------------------------------------- del interface
2768:
2769: sub del {
2770: my ($namespace,$storearr,$udomain,$uname)=@_;
2771: my $items='';
2772: foreach (@$storearr) {
2773: $items.=escape($_).'&';
2774: }
2775: $items=~s/\&$//;
2776: if (!$udomain) { $udomain=$env{'user.domain'}; }
2777: if (!$uname) { $uname=$env{'user.name'}; }
2778: my $uhome=&homeserver($uname,$udomain);
2779:
2780: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2781: }
2782:
2783: # -------------------------------------------------------------- dump interface
2784:
2785: sub dump {
2786: my ($namespace,$udomain,$uname,$regexp)=@_;
2787: if (!$udomain) { $udomain=$env{'user.domain'}; }
2788: if (!$uname) { $uname=$env{'user.name'}; }
2789: my $uhome=&homeserver($uname,$udomain);
2790: if ($regexp) {
2791: $regexp=&escape($regexp);
2792: } else {
2793: $regexp='.';
2794: }
2795: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2796: my @pairs=split(/\&/,$rep);
2797: my %returnhash=();
2798: foreach (@pairs) {
2799: my ($key,$value)=split(/=/,$_);
2800: $returnhash{unescape($key)}=&thaw_unescape($value);
2801: }
2802: return %returnhash;
2803: }
2804:
2805: # -------------------------------------------------------------- keys interface
2806:
2807: sub getkeys {
2808: my ($namespace,$udomain,$uname)=@_;
2809: if (!$udomain) { $udomain=$env{'user.domain'}; }
2810: if (!$uname) { $uname=$env{'user.name'}; }
2811: my $uhome=&homeserver($uname,$udomain);
2812: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2813: my @keyarray=();
2814: foreach (split(/\&/,$rep)) {
2815: push (@keyarray,&unescape($_));
2816: }
2817: return @keyarray;
2818: }
2819:
2820: # --------------------------------------------------------------- currentdump
2821: sub currentdump {
2822: my ($courseid,$sdom,$sname)=@_;
2823: $courseid = $env{'request.course.id'} if (! defined($courseid));
2824: $sdom = $env{'user.domain'} if (! defined($sdom));
2825: $sname = $env{'user.name'} if (! defined($sname));
2826: my $uhome = &homeserver($sname,$sdom);
2827: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2828: return if ($rep =~ /^(error:|no_such_host)/);
2829: #
2830: my %returnhash=();
2831: #
2832: if ($rep eq "unknown_cmd") {
2833: # an old lond will not know currentdump
2834: # Do a dump and make it look like a currentdump
2835: my @tmp = &dump($courseid,$sdom,$sname,'.');
2836: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2837: my %hash = @tmp;
2838: @tmp=();
2839: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2840: } else {
2841: my @pairs=split(/\&/,$rep);
2842: foreach (@pairs) {
2843: my ($key,$value)=split(/=/,$_);
2844: my ($symb,$param) = split(/:/,$key);
2845: $returnhash{&unescape($symb)}->{&unescape($param)} =
2846: &thaw_unescape($value);
2847: }
2848: }
2849: return %returnhash;
2850: }
2851:
2852: sub convert_dump_to_currentdump{
2853: my %hash = %{shift()};
2854: my %returnhash;
2855: # Code ripped from lond, essentially. The only difference
2856: # here is the unescaping done by lonnet::dump(). Conceivably
2857: # we might run in to problems with parameter names =~ /^v\./
2858: while (my ($key,$value) = each(%hash)) {
2859: my ($v,$symb,$param) = split(/:/,$key);
2860: next if ($v eq 'version' || $symb eq 'keys');
2861: next if (exists($returnhash{$symb}) &&
2862: exists($returnhash{$symb}->{$param}) &&
2863: $returnhash{$symb}->{'v.'.$param} > $v);
2864: $returnhash{$symb}->{$param}=$value;
2865: $returnhash{$symb}->{'v.'.$param}=$v;
2866: }
2867: #
2868: # Remove all of the keys in the hashes which keep track of
2869: # the version of the parameter.
2870: while (my ($symb,$param_hash) = each(%returnhash)) {
2871: # use a foreach because we are going to delete from the hash.
2872: foreach my $key (keys(%$param_hash)) {
2873: delete($param_hash->{$key}) if ($key =~ /^v\./);
2874: }
2875: }
2876: return \%returnhash;
2877: }
2878:
2879: # ------------------------------------------------------ critical inc interface
2880:
2881: sub cinc {
2882: return &inc(@_,'critical');
2883: }
2884:
2885: # --------------------------------------------------------------- inc interface
2886:
2887: sub inc {
2888: my ($namespace,$store,$udomain,$uname,$critical) = @_;
2889: if (!$udomain) { $udomain=$env{'user.domain'}; }
2890: if (!$uname) { $uname=$env{'user.name'}; }
2891: my $uhome=&homeserver($uname,$udomain);
2892: my $items='';
2893: if (! ref($store)) {
2894: # got a single value, so use that instead
2895: $items = &escape($store).'=&';
2896: } elsif (ref($store) eq 'SCALAR') {
2897: $items = &escape($$store).'=&';
2898: } elsif (ref($store) eq 'ARRAY') {
2899: $items = join('=&',map {&escape($_);} @{$store});
2900: } elsif (ref($store) eq 'HASH') {
2901: while (my($key,$value) = each(%{$store})) {
2902: $items.= &escape($key).'='.&escape($value).'&';
2903: }
2904: }
2905: $items=~s/\&$//;
2906: if ($critical) {
2907: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
2908: } else {
2909: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2910: }
2911: }
2912:
2913: # --------------------------------------------------------------- put interface
2914:
2915: sub put {
2916: my ($namespace,$storehash,$udomain,$uname)=@_;
2917: if (!$udomain) { $udomain=$env{'user.domain'}; }
2918: if (!$uname) { $uname=$env{'user.name'}; }
2919: my $uhome=&homeserver($uname,$udomain);
2920: my $items='';
2921: foreach (keys %$storehash) {
2922: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2923: }
2924: $items=~s/\&$//;
2925: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2926: }
2927:
2928: # ------------------------------------------------------------ newput interface
2929:
2930: sub newput {
2931: my ($namespace,$storehash,$udomain,$uname)=@_;
2932: if (!$udomain) { $udomain=$env{'user.domain'}; }
2933: if (!$uname) { $uname=$env{'user.name'}; }
2934: my $uhome=&homeserver($uname,$udomain);
2935: my $items='';
2936: foreach my $key (keys(%$storehash)) {
2937: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
2938: }
2939: $items=~s/\&$//;
2940: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
2941: }
2942:
2943: # --------------------------------------------------------- putstore interface
2944:
2945: sub putstore {
2946: my ($namespace,$storehash,$udomain,$uname)=@_;
2947: if (!$udomain) { $udomain=$env{'user.domain'}; }
2948: if (!$uname) { $uname=$env{'user.name'}; }
2949: my $uhome=&homeserver($uname,$udomain);
2950: my $items='';
2951: my %allitems = ();
2952: foreach (keys %$storehash) {
2953: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
2954: my $key = $1.':keys:'.$2;
2955: $allitems{$key} .= $3.':';
2956: }
2957: $items.=$_.'='.&freeze_escape($$storehash{$_}).'&';
2958: }
2959: foreach (keys %allitems) {
2960: $allitems{$_} =~ s/\:$//;
2961: $items.= $_.'='.$allitems{$_}.'&';
2962: }
2963: $items=~s/\&$//;
2964: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2965: }
2966:
2967: # ------------------------------------------------------ critical put interface
2968:
2969: sub cput {
2970: my ($namespace,$storehash,$udomain,$uname)=@_;
2971: if (!$udomain) { $udomain=$env{'user.domain'}; }
2972: if (!$uname) { $uname=$env{'user.name'}; }
2973: my $uhome=&homeserver($uname,$udomain);
2974: my $items='';
2975: foreach (keys %$storehash) {
2976: $items.=escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2977: }
2978: $items=~s/\&$//;
2979: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2980: }
2981:
2982: # -------------------------------------------------------------- eget interface
2983:
2984: sub eget {
2985: my ($namespace,$storearr,$udomain,$uname)=@_;
2986: my $items='';
2987: foreach (@$storearr) {
2988: $items.=escape($_).'&';
2989: }
2990: $items=~s/\&$//;
2991: if (!$udomain) { $udomain=$env{'user.domain'}; }
2992: if (!$uname) { $uname=$env{'user.name'}; }
2993: my $uhome=&homeserver($uname,$udomain);
2994: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2995: my @pairs=split(/\&/,$rep);
2996: my %returnhash=();
2997: my $i=0;
2998: foreach (@$storearr) {
2999: $returnhash{$_}=&thaw_unescape($pairs[$i]);
3000: $i++;
3001: }
3002: return %returnhash;
3003: }
3004:
3005: # ------------------------------------------------------------ tmpput interface
3006: sub tmpput {
3007: my ($storehash,$server)=@_;
3008: my $items='';
3009: foreach (keys(%$storehash)) {
3010: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3011: }
3012: $items=~s/\&$//;
3013: return &reply("tmpput:$items",$server);
3014: }
3015:
3016: # ------------------------------------------------------------ tmpget interface
3017: sub tmpget {
3018: my ($token)=@_;
3019: my $rep=&reply("tmpget:$token",$perlvar{'lonHostID'});
3020: my %returnhash;
3021: foreach my $item (split(/\&/,$rep)) {
3022: my ($key,$value)=split(/=/,$item);
3023: $returnhash{&unescape($key)}=&thaw_unescape($value);
3024: }
3025: return %returnhash;
3026: }
3027:
3028: # ---------------------------------------------- Custom access rule evaluation
3029:
3030: sub customaccess {
3031: my ($priv,$uri)=@_;
3032: my ($urole,$urealm)=split(/\./,$env{'request.role'});
3033: $urealm=~s/^\W//;
3034: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
3035: my $access=0;
3036: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
3037: my ($effect,$realm,$role)=split(/\:/,$_);
3038: if ($role) {
3039: if ($role ne $urole) { next; }
3040: }
3041: foreach (split(/\s*\,\s*/,$realm)) {
3042: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
3043: if ($tdom) {
3044: if ($tdom ne $udom) { next; }
3045: }
3046: if ($tcrs) {
3047: if ($tcrs ne $ucrs) { next; }
3048: }
3049: if ($tsec) {
3050: if ($tsec ne $usec) { next; }
3051: }
3052: $access=($effect eq 'allow');
3053: last;
3054: }
3055: if ($realm eq '' && $role eq '') {
3056: $access=($effect eq 'allow');
3057: }
3058: }
3059: return $access;
3060: }
3061:
3062: # ------------------------------------------------- Check for a user privilege
3063:
3064: sub allowed {
3065: my ($priv,$uri,$symb)=@_;
3066: $uri=&deversion($uri);
3067: my $orguri=$uri;
3068: $uri=&declutter($uri);
3069:
3070: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3071: # Free bre access to adm and meta resources
3072: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
3073: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
3074: return 'F';
3075: }
3076:
3077: # Free bre access to user's own portfolio contents
3078: my ($space,$domain,$name,$dir)=split('/',$uri);
3079: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3080: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
3081: return 'F';
3082: }
3083:
3084: # Free bre to public access
3085:
3086: if ($priv eq 'bre') {
3087: my $copyright=&metadata($uri,'copyright');
3088: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3089: return 'F';
3090: }
3091: if ($copyright eq 'priv') {
3092: $uri=~/([^\/]+)\/([^\/]+)\//;
3093: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3094: return '';
3095: }
3096: }
3097: if ($copyright eq 'domain') {
3098: $uri=~/([^\/]+)\/([^\/]+)\//;
3099: unless (($env{'user.domain'} eq $1) ||
3100: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3101: return '';
3102: }
3103: }
3104: if ($env{'request.role'}=~ /li\.\//) {
3105: # Library role, so allow browsing of resources in this domain.
3106: return 'F';
3107: }
3108: if ($copyright eq 'custom') {
3109: unless (&customaccess($priv,$uri)) { return ''; }
3110: }
3111: }
3112: # Domain coordinator is trying to create a course
3113: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3114: # uri is the requested domain in this case.
3115: # comparison to 'request.role.domain' shows if the user has selected
3116: # a role of dc for the domain in question.
3117: return 'F' if ($uri eq $env{'request.role.domain'});
3118: }
3119:
3120: my $thisallowed='';
3121: my $statecond=0;
3122: my $courseprivid='';
3123:
3124: # Course
3125:
3126: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3127: $thisallowed.=$1;
3128: }
3129:
3130: # Domain
3131:
3132: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3133: =~/\Q$priv\E\&([^\:]*)/) {
3134: $thisallowed.=$1;
3135: }
3136:
3137: # Course: uri itself is a course
3138: my $courseuri=$uri;
3139: $courseuri=~s/\_(\d)/\/$1/;
3140: $courseuri=~s/^([^\/])/\/$1/;
3141:
3142: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3143: =~/\Q$priv\E\&([^\:]*)/) {
3144: $thisallowed.=$1;
3145: }
3146:
3147: # Group: uri itself is a group
3148: my $groupuri=$uri;
3149: $groupuri=~s/^([^\/])/\/$1/;
3150: if ($env{'user.priv.'.$env{'request.role'}.'.'.$groupuri}
3151: =~/\Q$priv\E\&([^\:]*)/) {
3152: $thisallowed.=$1;
3153: }
3154:
3155: # URI is an uploaded document for this course, default permissions don't matter
3156: # not allowing 'edit' access (editupload) to uploaded course docs
3157: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3158: $thisallowed='';
3159: my ($match)=&is_on_map($uri);
3160: if ($match) {
3161: if ($env{'user.priv.'.$env{'request.role'}.'./'}
3162: =~/\Q$priv\E\&([^\:]*)/) {
3163: $thisallowed.=$1;
3164: }
3165: } else {
3166: my $refuri=$env{'httpref.'.$orguri};
3167: if ($refuri) {
3168: if ($refuri =~ m|^/adm/|) {
3169: $thisallowed='F';
3170: } else {
3171: $refuri=&declutter($refuri);
3172: my ($match) = &is_on_map($refuri);
3173: if ($match) {
3174: $thisallowed='F';
3175: }
3176: }
3177: }
3178: }
3179: }
3180:
3181: # Full access at system, domain or course-wide level? Exit.
3182:
3183: if ($thisallowed=~/F/) {
3184: return 'F';
3185: }
3186:
3187: # If this is generating or modifying users, exit with special codes
3188:
3189: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3190: if (($priv eq 'cca') || ($priv eq 'caa')) {
3191: my ($audom,$auname)=split('/',$uri);
3192: # no author name given, so this just checks on the general right to make a co-author in this domain
3193: unless ($auname) { return $thisallowed; }
3194: # an author name is given, so we are about to actually make a co-author for a certain account
3195: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3196: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3197: ($audom ne $env{'request.role.domain'}))) { return ''; }
3198: }
3199: return $thisallowed;
3200: }
3201: #
3202: # Gathered so far: system, domain and course wide privileges
3203: #
3204: # Course: See if uri or referer is an individual resource that is part of
3205: # the course
3206:
3207: if ($env{'request.course.id'}) {
3208:
3209: $courseprivid=$env{'request.course.id'};
3210: if ($env{'request.course.sec'}) {
3211: $courseprivid.='/'.$env{'request.course.sec'};
3212: }
3213: $courseprivid=~s/\_/\//;
3214: my $checkreferer=1;
3215: my ($match,$cond)=&is_on_map($uri);
3216: if ($match) {
3217: $statecond=$cond;
3218: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3219: =~/\Q$priv\E\&([^\:]*)/) {
3220: $thisallowed.=$1;
3221: $checkreferer=0;
3222: }
3223: }
3224:
3225: if ($checkreferer) {
3226: my $refuri=$env{'httpref.'.$orguri};
3227: unless ($refuri) {
3228: foreach (keys %env) {
3229: if ($_=~/^httpref\..*\*/) {
3230: my $pattern=$_;
3231: $pattern=~s/^httpref\.\/res\///;
3232: $pattern=~s/\*/\[\^\/\]\+/g;
3233: $pattern=~s/\//\\\//g;
3234: if ($orguri=~/$pattern/) {
3235: $refuri=$env{$_};
3236: }
3237: }
3238: }
3239: }
3240:
3241: if ($refuri) {
3242: $refuri=&declutter($refuri);
3243: my ($match,$cond)=&is_on_map($refuri);
3244: if ($match) {
3245: my $refstatecond=$cond;
3246: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3247: =~/\Q$priv\E\&([^\:]*)/) {
3248: $thisallowed.=$1;
3249: $uri=$refuri;
3250: $statecond=$refstatecond;
3251: }
3252: }
3253: }
3254: }
3255: }
3256:
3257: #
3258: # Gathered now: all privileges that could apply, and condition number
3259: #
3260: #
3261: # Full or no access?
3262: #
3263:
3264: if ($thisallowed=~/F/) {
3265: return 'F';
3266: }
3267:
3268: unless ($thisallowed) {
3269: return '';
3270: }
3271:
3272: # Restrictions exist, deal with them
3273: #
3274: # C:according to course preferences
3275: # R:according to resource settings
3276: # L:unless locked
3277: # X:according to user session state
3278: #
3279:
3280: # Possibly locked functionality, check all courses
3281: # Locks might take effect only after 10 minutes cache expiration for other
3282: # courses, and 2 minutes for current course
3283:
3284: my $envkey;
3285: if ($thisallowed=~/L/) {
3286: foreach $envkey (keys %env) {
3287: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3288: my $courseid=$2;
3289: my $roleid=$1.'.'.$2;
3290: $courseid=~s/^\///;
3291: my $expiretime=600;
3292: if ($env{'request.role'} eq $roleid) {
3293: $expiretime=120;
3294: }
3295: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3296: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3297: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3298: &coursedescription($courseid);
3299: }
3300: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3301: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3302: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3303: &log($env{'user.domain'},$env{'user.name'},
3304: $env{'user.home'},
3305: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3306: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3307: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3308: return '';
3309: }
3310: }
3311: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3312: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3313: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3314: &log($env{'user.domain'},$env{'user.name'},
3315: $env{'user.home'},
3316: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3317: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3318: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3319: return '';
3320: }
3321: }
3322: }
3323: }
3324: }
3325:
3326: #
3327: # Rest of the restrictions depend on selected course
3328: #
3329:
3330: unless ($env{'request.course.id'}) {
3331: return '1';
3332: }
3333:
3334: #
3335: # Now user is definitely in a course
3336: #
3337:
3338:
3339: # Course preferences
3340:
3341: if ($thisallowed=~/C/) {
3342: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3343: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
3344: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
3345: =~/\Q$rolecode\E/) {
3346: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3347: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3348: $env{'request.course.id'});
3349: return '';
3350: }
3351:
3352: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
3353: =~/\Q$unamedom\E/) {
3354: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
3355: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3356: $env{'request.course.id'});
3357: return '';
3358: }
3359: }
3360:
3361: # Resource preferences
3362:
3363: if ($thisallowed=~/R/) {
3364: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3365: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3366: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3367: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3368: return '';
3369: }
3370: }
3371:
3372: # Restricted by state or randomout?
3373:
3374: if ($thisallowed=~/X/) {
3375: if ($env{'acc.randomout'}) {
3376: if (!$symb) { $symb=&symbread($uri,1); }
3377: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3378: return '';
3379: }
3380: }
3381: if (&condval($statecond)) {
3382: return '2';
3383: } else {
3384: return '';
3385: }
3386: }
3387:
3388: return 'F';
3389: }
3390:
3391: # --------------------------------------------------- Is a resource on the map?
3392:
3393: sub is_on_map {
3394: my $uri=&deversion(&declutter(shift));
3395: my @uriparts=split(/\//,$uri);
3396: my $filename=$uriparts[$#uriparts];
3397: my $pathname=$uri;
3398: $pathname=~s|/\Q$filename\E$||;
3399: $pathname=~s/^adm\/wrapper\///;
3400: #Trying to find the conditional for the file
3401: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3402: /\&\Q$filename\E\:([\d\|]+)\&/);
3403: if ($match) {
3404: return (1,$1);
3405: } else {
3406: return (0,0);
3407: }
3408: }
3409:
3410: # --------------------------------------------------------- Get symb from alias
3411:
3412: sub get_symb_from_alias {
3413: my $symb=shift;
3414: my ($map,$resid,$url)=&decode_symb($symb);
3415: # Already is a symb
3416: if ($url) { return $symb; }
3417: # Must be an alias
3418: my $aliassymb='';
3419: my %bighash;
3420: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
3421: &GDBM_READER(),0640)) {
3422: my $rid=$bighash{'mapalias_'.$symb};
3423: if ($rid) {
3424: my ($mapid,$resid)=split(/\./,$rid);
3425: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3426: $resid,$bighash{'src_'.$rid});
3427: }
3428: untie %bighash;
3429: }
3430: return $aliassymb;
3431: }
3432:
3433: # ----------------------------------------------------------------- Define Role
3434:
3435: sub definerole {
3436: if (allowed('mcr','/')) {
3437: my ($rolename,$sysrole,$domrole,$courole)=@_;
3438: foreach (split(':',$sysrole)) {
3439: my ($crole,$cqual)=split(/\&/,$_);
3440: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3441: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3442: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3443: return "refused:s:$crole&$cqual";
3444: }
3445: }
3446: }
3447: foreach (split(':',$domrole)) {
3448: my ($crole,$cqual)=split(/\&/,$_);
3449: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3450: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3451: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3452: return "refused:d:$crole&$cqual";
3453: }
3454: }
3455: }
3456: foreach (split(':',$courole)) {
3457: my ($crole,$cqual)=split(/\&/,$_);
3458: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3459: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3460: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3461: return "refused:c:$crole&$cqual";
3462: }
3463: }
3464: }
3465: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3466: "$env{'user.domain'}:$env{'user.name'}:".
3467: "rolesdef_$rolename=".
3468: escape($sysrole.'_'.$domrole.'_'.$courole);
3469: return reply($command,$env{'user.home'});
3470: } else {
3471: return 'refused';
3472: }
3473: }
3474:
3475: # ---------------- Make a metadata query against the network of library servers
3476:
3477: sub metadata_query {
3478: my ($query,$custom,$customshow,$server_array)=@_;
3479: my %rhash;
3480: my @server_list = (defined($server_array) ? @$server_array
3481: : keys(%libserv) );
3482: for my $server (@server_list) {
3483: unless ($custom or $customshow) {
3484: my $reply=&reply("querysend:".&escape($query),$server);
3485: $rhash{$server}=$reply;
3486: }
3487: else {
3488: my $reply=&reply("querysend:".&escape($query).':'.
3489: &escape($custom).':'.&escape($customshow),
3490: $server);
3491: $rhash{$server}=$reply;
3492: }
3493: }
3494: return \%rhash;
3495: }
3496:
3497: # ----------------------------------------- Send log queries and wait for reply
3498:
3499: sub log_query {
3500: my ($uname,$udom,$query,%filters)=@_;
3501: my $uhome=&homeserver($uname,$udom);
3502: if ($uhome eq 'no_host') { return 'error: no_host'; }
3503: my $uhost=$hostname{$uhome};
3504: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3505: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3506: $uhome);
3507: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3508: return get_query_reply($queryid);
3509: }
3510:
3511: # ------- Request retrieval of institutional classlists for course(s)
3512:
3513: sub fetch_enrollment_query {
3514: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3515: my $homeserver;
3516: my $maxtries = 1;
3517: if ($context eq 'automated') {
3518: $homeserver = $perlvar{'lonHostID'};
3519: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3520: } else {
3521: $homeserver = &homeserver($cnum,$dom);
3522: }
3523: my $host=$hostname{$homeserver};
3524: my $cmd = '';
3525: foreach (keys %{$affiliatesref}) {
3526: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3527: }
3528: $cmd =~ s/%%$//;
3529: $cmd = &escape($cmd);
3530: my $query = 'fetchenrollment';
3531: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
3532: unless ($queryid=~/^\Q$host\E\_/) {
3533: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3534: return 'error: '.$queryid;
3535: }
3536: my $reply = &get_query_reply($queryid);
3537: my $tries = 1;
3538: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3539: $reply = &get_query_reply($queryid);
3540: $tries ++;
3541: }
3542: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3543: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3544: } else {
3545: my @responses = split/:/,$reply;
3546: if ($homeserver eq $perlvar{'lonHostID'}) {
3547: foreach (@responses) {
3548: my ($key,$value) = split/=/,$_;
3549: $$replyref{$key} = $value;
3550: }
3551: } else {
3552: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3553: foreach (@responses) {
3554: my ($key,$value) = split/=/,$_;
3555: $$replyref{$key} = $value;
3556: if ($value > 0) {
3557: foreach (@{$$affiliatesref{$key}}) {
3558: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3559: my $destname = $pathname.'/'.$filename;
3560: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3561: if ($xml_classlist =~ /^error/) {
3562: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3563: } else {
3564: if ( open(FILE,">$destname") ) {
3565: print FILE &unescape($xml_classlist);
3566: close(FILE);
3567: } else {
3568: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3569: }
3570: }
3571: }
3572: }
3573: }
3574: }
3575: return 'ok';
3576: }
3577: return 'error';
3578: }
3579:
3580: sub get_query_reply {
3581: my $queryid=shift;
3582: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3583: my $reply='';
3584: for (1..100) {
3585: sleep 2;
3586: if (-e $replyfile.'.end') {
3587: if (open(my $fh,$replyfile)) {
3588: $reply.=<$fh>;
3589: close($fh);
3590: } else { return 'error: reply_file_error'; }
3591: return &unescape($reply);
3592: }
3593: }
3594: return 'timeout:'.$queryid;
3595: }
3596:
3597: sub courselog_query {
3598: #
3599: # possible filters:
3600: # url: url or symb
3601: # username
3602: # domain
3603: # action: view, submit, grade
3604: # start: timestamp
3605: # end: timestamp
3606: #
3607: my (%filters)=@_;
3608: unless ($env{'request.course.id'}) { return 'no_course'; }
3609: if ($filters{'url'}) {
3610: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3611: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3612: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3613: }
3614: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
3615: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
3616: return &log_query($cname,$cdom,'courselog',%filters);
3617: }
3618:
3619: sub userlog_query {
3620: my ($uname,$udom,%filters)=@_;
3621: return &log_query($uname,$udom,'userlog',%filters);
3622: }
3623:
3624: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3625:
3626: sub auto_run {
3627: my ($cnum,$cdom) = @_;
3628: my $homeserver = &homeserver($cnum,$cdom);
3629: my $response = &reply('autorun:'.$cdom,$homeserver);
3630: return $response;
3631: }
3632:
3633: sub auto_get_sections {
3634: my ($cnum,$cdom,$inst_coursecode) = @_;
3635: my $homeserver = &homeserver($cnum,$cdom);
3636: my @secs = ();
3637: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3638: unless ($response eq 'refused') {
3639: @secs = split/:/,$response;
3640: }
3641: return @secs;
3642: }
3643:
3644: sub auto_new_course {
3645: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3646: my $homeserver = &homeserver($cnum,$cdom);
3647: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3648: return $response;
3649: }
3650:
3651: sub auto_validate_courseID {
3652: my ($cnum,$cdom,$inst_course_id) = @_;
3653: my $homeserver = &homeserver($cnum,$cdom);
3654: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3655: return $response;
3656: }
3657:
3658: sub auto_create_password {
3659: my ($cnum,$cdom,$authparam) = @_;
3660: my $homeserver = &homeserver($cnum,$cdom);
3661: my $create_passwd = 0;
3662: my $authchk = '';
3663: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3664: if ($response eq 'refused') {
3665: $authchk = 'refused';
3666: } else {
3667: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3668: }
3669: return ($authparam,$create_passwd,$authchk);
3670: }
3671:
3672: sub auto_instcode_format {
3673: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3674: my $courses = '';
3675: my $homeserver;
3676: if ($caller eq 'global') {
3677: foreach my $tryserver (keys %libserv) {
3678: if ($hostdom{$tryserver} eq $codedom) {
3679: $homeserver = $tryserver;
3680: last;
3681: }
3682: }
3683: if (($env{'user.name'}) && ($env{'user.domain'} eq $codedom)) {
3684: $homeserver = &homeserver($env{'user.name'},$codedom);
3685: }
3686: } else {
3687: $homeserver = &homeserver($caller,$codedom);
3688: }
3689: foreach (keys %{$instcodes}) {
3690: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3691: }
3692: chop($courses);
3693: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3694: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3695: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3696: %{$codes} = &str2hash($codes_str);
3697: @{$codetitles} = &str2array($codetitles_str);
3698: %{$cat_titles} = &str2hash($cat_titles_str);
3699: %{$cat_order} = &str2hash($cat_order_str);
3700: return 'ok';
3701: }
3702: return $response;
3703: }
3704:
3705: # ------------------------------------------------------------------ Plain Text
3706:
3707: sub plaintext {
3708: my $short=shift;
3709: return &Apache::lonlocal::mt($prp{$short});
3710: }
3711:
3712: # ----------------------------------------------------------------- Assign Role
3713:
3714: sub assignrole {
3715: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3716: my $mrole;
3717: if ($role =~ /^cr\//) {
3718: my $cwosec=$url;
3719: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3720: unless (&allowed('ccr',$cwosec)) {
3721: &logthis('Refused custom assignrole: '.
3722: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3723: $env{'user.name'}.' at '.$env{'user.domain'});
3724: return 'refused';
3725: }
3726: $mrole='cr';
3727: } elsif ($role =~ /^gr\//) {
3728: my $cwogrp=$url;
3729: $cwogrp=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3730: unless (&allowed('mdg',$cwogrp)) {
3731: &logthis('Refused group assignrole: '.
3732: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3733: $env{'user.name'}.' at '.$env{'user.domain'});
3734: return 'refused';
3735: }
3736: $mrole='gr';
3737: } else {
3738: my $cwosec=$url;
3739: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3740: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3741: &logthis('Refused assignrole: '.
3742: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3743: $env{'user.name'}.' at '.$env{'user.domain'});
3744: return 'refused';
3745: }
3746: $mrole=$role;
3747: }
3748: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3749: "$udom:$uname:$url".'_'."$mrole=$role";
3750: if ($end) { $command.='_'.$end; }
3751: if ($start) {
3752: if ($end) {
3753: $command.='_'.$start;
3754: } else {
3755: $command.='_0_'.$start;
3756: }
3757: }
3758: # actually delete
3759: if ($deleteflag) {
3760: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3761: # modify command to delete the role
3762: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
3763: "$udom:$uname:$url".'_'."$mrole";
3764: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
3765: # set start and finish to negative values for userrolelog
3766: $start=-1;
3767: $end=-1;
3768: }
3769: }
3770: # send command
3771: my $answer=&reply($command,&homeserver($uname,$udom));
3772: # log new user role if status is ok
3773: if ($answer eq 'ok') {
3774: &userrolelog($role,$uname,$udom,$url,$start,$end);
3775: }
3776: return $answer;
3777: }
3778:
3779: # -------------------------------------------------- Modify user authentication
3780: # Overrides without validation
3781:
3782: sub modifyuserauth {
3783: my ($udom,$uname,$umode,$upass)=@_;
3784: my $uhome=&homeserver($uname,$udom);
3785: unless (&allowed('mau',$udom)) { return 'refused'; }
3786: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3787: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
3788: ' in domain '.$env{'request.role.domain'});
3789: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3790: &escape($upass),$uhome);
3791: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
3792: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3793: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3794: &log($udom,,$uname,$uhome,
3795: 'Authentication changed by '.$env{'user.domain'}.', '.
3796: $env{'user.name'}.', '.$umode.
3797: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3798: unless ($reply eq 'ok') {
3799: &logthis('Authentication mode error: '.$reply);
3800: return 'error: '.$reply;
3801: }
3802: return 'ok';
3803: }
3804:
3805: # --------------------------------------------------------------- Modify a user
3806:
3807: sub modifyuser {
3808: my ($udom, $uname, $uid,
3809: $umode, $upass, $first,
3810: $middle, $last, $gene,
3811: $forceid, $desiredhome, $email)=@_;
3812: $udom=~s/\W//g;
3813: $uname=~s/\W//g;
3814: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3815: $umode.', '.$first.', '.$middle.', '.
3816: $last.', '.$gene.'(forceid: '.$forceid.')'.
3817: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3818: ' desiredhome not specified').
3819: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
3820: ' in domain '.$env{'request.role.domain'});
3821: my $uhome=&homeserver($uname,$udom,'true');
3822: # ----------------------------------------------------------------- Create User
3823: if (($uhome eq 'no_host') &&
3824: (($umode && $upass) || ($umode eq 'localauth'))) {
3825: my $unhome='';
3826: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3827: $unhome = $desiredhome;
3828: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
3829: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
3830: } else { # load balancing routine for determining $unhome
3831: my $tryserver;
3832: my $loadm=10000000;
3833: foreach $tryserver (keys %libserv) {
3834: if ($hostdom{$tryserver} eq $udom) {
3835: my $answer=reply('load',$tryserver);
3836: if (($answer=~/\d+/) && ($answer<$loadm)) {
3837: $loadm=$answer;
3838: $unhome=$tryserver;
3839: }
3840: }
3841: }
3842: }
3843: if (($unhome eq '') || ($unhome eq 'no_host')) {
3844: return 'error: unable to find a home server for '.$uname.
3845: ' in domain '.$udom;
3846: }
3847: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3848: &escape($upass),$unhome);
3849: unless ($reply eq 'ok') {
3850: return 'error: '.$reply;
3851: }
3852: $uhome=&homeserver($uname,$udom,'true');
3853: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3854: return 'error: unable verify users home machine.';
3855: }
3856: } # End of creation of new user
3857: # ---------------------------------------------------------------------- Add ID
3858: if ($uid) {
3859: $uid=~tr/A-Z/a-z/;
3860: my %uidhash=&idrget($udom,$uname);
3861: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3862: && (!$forceid)) {
3863: unless ($uid eq $uidhash{$uname}) {
3864: return 'error: user id "'.$uid.'" does not match '.
3865: 'current user id "'.$uidhash{$uname}.'".';
3866: }
3867: } else {
3868: &idput($udom,($uname => $uid));
3869: }
3870: }
3871: # -------------------------------------------------------------- Add names, etc
3872: my @tmp=&get('environment',
3873: ['firstname','middlename','lastname','generation'],
3874: $udom,$uname);
3875: my %names;
3876: if ($tmp[0] =~ m/^error:.*/) {
3877: %names=();
3878: } else {
3879: %names = @tmp;
3880: }
3881: #
3882: # Make sure to not trash student environment if instructor does not bother
3883: # to supply name and email information
3884: #
3885: if ($first) { $names{'firstname'} = $first; }
3886: if (defined($middle)) { $names{'middlename'} = $middle; }
3887: if ($last) { $names{'lastname'} = $last; }
3888: if (defined($gene)) { $names{'generation'} = $gene; }
3889: if ($email) {
3890: $email=~s/[^\w\@\.\-\,]//gs;
3891: if ($email=~/\@/) { $names{'notification'} = $email;
3892: $names{'critnotification'} = $email;
3893: $names{'permanentemail'} = $email; }
3894: }
3895: my $reply = &put('environment', \%names, $udom,$uname);
3896: if ($reply ne 'ok') { return 'error: '.$reply; }
3897: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
3898: $umode.', '.$first.', '.$middle.', '.
3899: $last.', '.$gene.' by '.
3900: $env{'user.name'}.' at '.$env{'user.domain'});
3901: return 'ok';
3902: }
3903:
3904: # -------------------------------------------------------------- Modify student
3905:
3906: sub modifystudent {
3907: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3908: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
3909: if (!$cid) {
3910: unless ($cid=$env{'request.course.id'}) {
3911: return 'not_in_class';
3912: }
3913: }
3914: # --------------------------------------------------------------- Make the user
3915: my $reply=&modifyuser
3916: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
3917: $desiredhome,$email);
3918: unless ($reply eq 'ok') { return $reply; }
3919: # This will cause &modify_student_enrollment to get the uid from the
3920: # students environment
3921: $uid = undef if (!$forceid);
3922: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
3923: $gene,$usec,$end,$start,$type,$locktype,$cid);
3924: return $reply;
3925: }
3926:
3927: sub modify_student_enrollment {
3928: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
3929: my ($cdom,$cnum,$chome);
3930: if (!$cid) {
3931: unless ($cid=$env{'request.course.id'}) {
3932: return 'not_in_class';
3933: }
3934: $cdom=$env{'course.'.$cid.'.domain'};
3935: $cnum=$env{'course.'.$cid.'.num'};
3936: } else {
3937: ($cdom,$cnum)=split(/_/,$cid);
3938: }
3939: $chome=$env{'course.'.$cid.'.home'};
3940: if (!$chome) {
3941: $chome=&homeserver($cnum,$cdom);
3942: }
3943: if (!$chome) { return 'unknown_course'; }
3944: # Make sure the user exists
3945: my $uhome=&homeserver($uname,$udom);
3946: if (($uhome eq '') || ($uhome eq 'no_host')) {
3947: return 'error: no such user';
3948: }
3949: # Get student data if we were not given enough information
3950: if (!defined($first) || $first eq '' ||
3951: !defined($last) || $last eq '' ||
3952: !defined($uid) || $uid eq '' ||
3953: !defined($middle) || $middle eq '' ||
3954: !defined($gene) || $gene eq '') {
3955: # They did not supply us with enough data to enroll the student, so
3956: # we need to pick up more information.
3957: my %tmp = &get('environment',
3958: ['firstname','middlename','lastname', 'generation','id']
3959: ,$udom,$uname);
3960:
3961: #foreach (keys(%tmp)) {
3962: # &logthis("key $_ = ".$tmp{$_});
3963: #}
3964: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3965: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3966: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3967: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3968: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3969: }
3970: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
3971: my $reply=cput('classlist',
3972: {"$uname:$udom" =>
3973: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
3974: $cdom,$cnum);
3975: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3976: return 'error: '.$reply;
3977: } else {
3978: &devalidate_getsection_cache($udom,$uname,$cid);
3979: }
3980: # Add student role to user
3981: my $uurl='/'.$cid;
3982: $uurl=~s/\_/\//g;
3983: if ($usec) {
3984: $uurl.='/'.$usec;
3985: }
3986: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3987: }
3988:
3989: sub format_name {
3990: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
3991: my $name;
3992: if ($first ne 'lastname') {
3993: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
3994: } else {
3995: if ($lastname=~/\S/) {
3996: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
3997: $name=~s/\s+,/,/;
3998: } else {
3999: $name.= $firstname.' '.$middlename.' '.$generation;
4000: }
4001: }
4002: $name=~s/^\s+//;
4003: $name=~s/\s+$//;
4004: $name=~s/\s+/ /g;
4005: return $name;
4006: }
4007:
4008: # ------------------------------------------------- Write to course preferences
4009:
4010: sub writecoursepref {
4011: my ($courseid,%prefs)=@_;
4012: $courseid=~s/^\///;
4013: $courseid=~s/\_/\//g;
4014: my ($cdomain,$cnum)=split(/\//,$courseid);
4015: my $chome=homeserver($cnum,$cdomain);
4016: if (($chome eq '') || ($chome eq 'no_host')) {
4017: return 'error: no such course';
4018: }
4019: my $cstring='';
4020: foreach (keys %prefs) {
4021: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
4022: }
4023: $cstring=~s/\&$//;
4024: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
4025: }
4026:
4027: # ---------------------------------------------------------- Make/modify course
4028:
4029: sub createcourse {
4030: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_;
4031: $url=&declutter($url);
4032: my $cid='';
4033: unless (&allowed('ccc',$udom)) {
4034: return 'refused';
4035: }
4036: # ------------------------------------------------------------------- Create ID
4037: my $uname=int(1+rand(9)).
4038: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
4039: substr($$.time,0,5).unpack("H8",pack("I32",time)).
4040: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4041: # ----------------------------------------------- Make sure that does not exist
4042: my $uhome=&homeserver($uname,$udom,'true');
4043: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4044: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
4045: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4046: $uhome=&homeserver($uname,$udom,'true');
4047: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4048: return 'error: unable to generate unique course-ID';
4049: }
4050: }
4051: # ------------------------------------------------ Check supplied server name
4052: $course_server = $env{'user.homeserver'} if (! defined($course_server));
4053: if (! exists($libserv{$course_server})) {
4054: return 'error:bad server name '.$course_server;
4055: }
4056: # ------------------------------------------------------------- Make the course
4057: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
4058: $course_server);
4059: unless ($reply eq 'ok') { return 'error: '.$reply; }
4060: $uhome=&homeserver($uname,$udom,'true');
4061: if (($uhome eq '') || ($uhome eq 'no_host')) {
4062: return 'error: no such course';
4063: }
4064: # ----------------------------------------------------------------- Course made
4065: # log existence
4066: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
4067: ':'.&escape($inst_code).':'.&escape($course_owner),$uhome);
4068: &flushcourselogs();
4069: # set toplevel url
4070: my $topurl=$url;
4071: unless ($nonstandard) {
4072: # ------------------------------------------ For standard courses, make top url
4073: my $mapurl=&clutter($url);
4074: if ($mapurl eq '/res/') { $mapurl=''; }
4075: $env{'form.initmap'}=(<<ENDINITMAP);
4076: <map>
4077: <resource id="1" type="start"></resource>
4078: <resource id="2" src="$mapurl"></resource>
4079: <resource id="3" type="finish"></resource>
4080: <link index="1" from="1" to="2"></link>
4081: <link index="2" from="2" to="3"></link>
4082: </map>
4083: ENDINITMAP
4084: $topurl=&declutter(
4085: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
4086: );
4087: }
4088: # ----------------------------------------------------------- Write preferences
4089: &writecoursepref($udom.'_'.$uname,
4090: ('description' => $description,
4091: 'url' => $topurl));
4092: return '/'.$udom.'/'.$uname;
4093: }
4094:
4095: # ---------------------------------------------------------- Assign Custom Role
4096:
4097: sub assigncustomrole {
4098: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
4099: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
4100: $end,$start,$deleteflag);
4101: }
4102:
4103: # ----------------------------------------------------------------- Revoke Role
4104:
4105: sub revokerole {
4106: my ($udom,$uname,$url,$role,$deleteflag)=@_;
4107: my $now=time;
4108: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
4109: }
4110:
4111: # ---------------------------------------------------------- Revoke Custom Role
4112:
4113: sub revokecustomrole {
4114: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
4115: my $now=time;
4116: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
4117: $deleteflag);
4118: }
4119:
4120: # ------------------------------------------------------------ Disk usage
4121: sub diskusage {
4122: my ($udom,$uname,$directoryRoot)=@_;
4123: $directoryRoot =~ s/\/$//;
4124: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
4125: return $listing;
4126: }
4127:
4128: sub is_locked {
4129: my ($file_name, $domain, $user) = @_;
4130: my @check;
4131: my $is_locked;
4132: push @check, $file_name;
4133: my %locked = &get('file_permissions',\@check,
4134: $env{'user.domain'},$env{'user.name'});
4135: my ($tmp)=keys(%locked);
4136: if ($tmp=~/^error:/) { undef(%locked); }
4137:
4138: if (ref($locked{$file_name}) eq 'ARRAY') {
4139: $is_locked = 'true';
4140: } else {
4141: $is_locked = 'false';
4142: }
4143: }
4144:
4145: # ------------------------------------------------------------- Mark as Read Only
4146:
4147: sub mark_as_readonly {
4148: my ($domain,$user,$files,$what) = @_;
4149: my %current_permissions = &dump('file_permissions',$domain,$user);
4150: my ($tmp)=keys(%current_permissions);
4151: if ($tmp=~/^error:/) { undef(%current_permissions); }
4152: foreach my $file (@{$files}) {
4153: push(@{$current_permissions{$file}},$what);
4154: }
4155: &put('file_permissions',\%current_permissions,$domain,$user);
4156: return;
4157: }
4158:
4159: # ------------------------------------------------------------Save Selected Files
4160:
4161: sub save_selected_files {
4162: my ($user, $path, @files) = @_;
4163: my $filename = $user."savedfiles";
4164: my @other_files = &files_not_in_path($user, $path);
4165: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4166: foreach my $file (@files) {
4167: print (OUT $env{'form.currentpath'}.$file."\n");
4168: }
4169: foreach my $file (@other_files) {
4170: print (OUT $file."\n");
4171: }
4172: close (OUT);
4173: return 'ok';
4174: }
4175:
4176: sub clear_selected_files {
4177: my ($user) = @_;
4178: my $filename = $user."savedfiles";
4179: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4180: print (OUT undef);
4181: close (OUT);
4182: return ("ok");
4183: }
4184:
4185: sub files_in_path {
4186: my ($user, $path) = @_;
4187: my $filename = $user."savedfiles";
4188: my %return_files;
4189: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4190: while (my $line_in = <IN>) {
4191: chomp ($line_in);
4192: my @paths_and_file = split (m!/!, $line_in);
4193: my $file_part = pop (@paths_and_file);
4194: my $path_part = join ('/', @paths_and_file);
4195: $path_part.='/';
4196: my $path_and_file = $path_part.$file_part;
4197: if ($path_part eq $path) {
4198: $return_files{$file_part}= 'selected';
4199: }
4200: }
4201: close (IN);
4202: return (\%return_files);
4203: }
4204:
4205: # called in portfolio select mode, to show files selected NOT in current directory
4206: sub files_not_in_path {
4207: my ($user, $path) = @_;
4208: my $filename = $user."savedfiles";
4209: my @return_files;
4210: my $path_part;
4211: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4212: while (<IN>) {
4213: #ok, I know it's clunky, but I want it to work
4214: my @paths_and_file = split m!/!, $_;
4215: my $file_part = pop (@paths_and_file);
4216: chomp ($file_part);
4217: my $path_part = join ('/', @paths_and_file);
4218: $path_part .= '/';
4219: my $path_and_file = $path_part.$file_part;
4220: if ($path_part ne $path) {
4221: push (@return_files, ($path_and_file));
4222: }
4223: }
4224: close (OUT);
4225: return (@return_files);
4226: }
4227:
4228: #--------------------------------------------------------------Get Marked as Read Only
4229:
4230:
4231: sub get_marked_as_readonly {
4232: my ($domain,$user,$what) = @_;
4233: my %current_permissions = &dump('file_permissions',$domain,$user);
4234: my ($tmp)=keys(%current_permissions);
4235: if ($tmp=~/^error:/) { undef(%current_permissions); }
4236: my @readonly_files;
4237: my $cmp1=$what;
4238: if (ref($what)) { $cmp1=join('',@{$what}) };
4239: while (my ($file_name,$value) = each(%current_permissions)) {
4240: if (ref($value) eq "ARRAY"){
4241: foreach my $stored_what (@{$value}) {
4242: my $cmp2=$stored_what;
4243: if (ref($stored_what)) { $cmp2=join('',@{$stored_what}) };
4244: if ($cmp1 eq $cmp2) {
4245: push(@readonly_files, $file_name);
4246: } elsif (!defined($what)) {
4247: push(@readonly_files, $file_name);
4248: }
4249: }
4250: }
4251: }
4252: return @readonly_files;
4253: }
4254: #-----------------------------------------------------------Get Marked as Read Only Hash
4255:
4256: sub get_marked_as_readonly_hash {
4257: my ($domain,$user,$what) = @_;
4258: my %current_permissions = &dump('file_permissions',$domain,$user);
4259: my ($tmp)=keys(%current_permissions);
4260: if ($tmp=~/^error:/) { undef(%current_permissions); }
4261:
4262: my %readonly_files;
4263: while (my ($file_name,$value) = each(%current_permissions)) {
4264: if (ref($value) eq "ARRAY"){
4265: foreach my $stored_what (@{$value}) {
4266: if ($stored_what eq $what) {
4267: $readonly_files{$file_name} = 'locked';
4268: } elsif (!defined($what)) {
4269: $readonly_files{$file_name} = 'locked';
4270: }
4271: }
4272: }
4273: }
4274: return %readonly_files;
4275: }
4276: # ------------------------------------------------------------ Unmark as Read Only
4277:
4278: sub unmark_as_readonly {
4279: # unmarks $file_name (if $file_name is defined), or all files locked by $what
4280: # for portfolio submissions, $what contains [$symb,$crsid]
4281: my ($domain,$user,$what,$file_name) = @_;
4282: my $symb_crs = $what;
4283: if (ref($what)) { $symb_crs=join('',@$what); }
4284: my %current_permissions = &dump('file_permissions',$domain,$user);
4285: my ($tmp)=keys(%current_permissions);
4286: if ($tmp=~/^error:/) { undef(%current_permissions); }
4287: my @readonly_files = &get_marked_as_readonly($domain,$user,$what);
4288: foreach my $file (@readonly_files) {
4289: if (defined($file_name) && ($file_name ne $file)) { next; }
4290: my $current_locks = $current_permissions{$file};
4291: my @new_locks;
4292: my @del_keys;
4293: if (ref($current_locks) eq "ARRAY"){
4294: foreach my $locker (@{$current_locks}) {
4295: my $compare=$locker;
4296: if (ref($locker)) { $compare=join('',@{$locker}) };
4297: if ($compare ne $symb_crs) {
4298: push(@new_locks, $locker);
4299: }
4300: }
4301: if (scalar(@new_locks) > 0) {
4302: $current_permissions{$file} = \@new_locks;
4303: } else {
4304: push(@del_keys, $file);
4305: &del('file_permissions',\@del_keys, $domain, $user);
4306: delete($current_permissions{$file});
4307: }
4308: }
4309: }
4310: &put('file_permissions',\%current_permissions,$domain,$user);
4311: return;
4312: }
4313:
4314: # ------------------------------------------------------------ Directory lister
4315:
4316: sub dirlist {
4317: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
4318:
4319: $uri=~s/^\///;
4320: $uri=~s/\/$//;
4321: my ($udom, $uname);
4322: (undef,$udom,$uname)=split(/\//,$uri);
4323: if(defined($userdomain)) {
4324: $udom = $userdomain;
4325: }
4326: if(defined($username)) {
4327: $uname = $username;
4328: }
4329:
4330: my $dirRoot = $perlvar{'lonDocRoot'};
4331: if(defined($alternateDirectoryRoot)) {
4332: $dirRoot = $alternateDirectoryRoot;
4333: $dirRoot =~ s/\/$//;
4334: }
4335:
4336: if($udom) {
4337: if($uname) {
4338: my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
4339: homeserver($uname,$udom));
4340: my @listing_results;
4341: if ($listing eq 'unknown_cmd') {
4342: $listing=reply('ls:'.$dirRoot.'/'.$uri,
4343: homeserver($uname,$udom));
4344: @listing_results = split(/:/,$listing);
4345: } else {
4346: @listing_results = map { &unescape($_); } split(/:/,$listing);
4347: }
4348: return @listing_results;
4349: } elsif(!defined($alternateDirectoryRoot)) {
4350: my $tryserver;
4351: my %allusers=();
4352: foreach $tryserver (keys %libserv) {
4353: if($hostdom{$tryserver} eq $udom) {
4354: my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
4355: $udom, $tryserver);
4356: my @listing_results;
4357: if ($listing eq 'unknown_cmd') {
4358: $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
4359: $udom, $tryserver);
4360: @listing_results = split(/:/,$listing);
4361: } else {
4362: @listing_results =
4363: map { &unescape($_); } split(/:/,$listing);
4364: }
4365: if ($listing_results[0] ne 'no_such_dir' &&
4366: $listing_results[0] ne 'empty' &&
4367: $listing_results[0] ne 'con_lost') {
4368: foreach (@listing_results) {
4369: my ($entry,@stat)=split(/&/,$_);
4370: $allusers{$entry}=1;
4371: }
4372: }
4373: }
4374: }
4375: my $alluserstr='';
4376: foreach (sort keys %allusers) {
4377: $alluserstr.=$_.'&user:';
4378: }
4379: $alluserstr=~s/:$//;
4380: return split(/:/,$alluserstr);
4381: } else {
4382: my @emptyResults = ();
4383: push(@emptyResults, 'missing user name');
4384: return split(':',@emptyResults);
4385: }
4386: } elsif(!defined($alternateDirectoryRoot)) {
4387: my $tryserver;
4388: my %alldom=();
4389: foreach $tryserver (keys %libserv) {
4390: $alldom{$hostdom{$tryserver}}=1;
4391: }
4392: my $alldomstr='';
4393: foreach (sort keys %alldom) {
4394: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
4395: }
4396: $alldomstr=~s/:$//;
4397: return split(/:/,$alldomstr);
4398: } else {
4399: my @emptyResults = ();
4400: push(@emptyResults, 'missing domain');
4401: return split(':',@emptyResults);
4402: }
4403: }
4404:
4405: # --------------------------------------------- GetFileTimestamp
4406: # This function utilizes dirlist and returns the date stamp for
4407: # when it was last modified. It will also return an error of -1
4408: # if an error occurs
4409:
4410: ##
4411: ## FIXME: This subroutine assumes its caller knows something about the
4412: ## directory structure of the home server for the student ($root).
4413: ## Not a good assumption to make. Since this is for looking up files
4414: ## in user directories, the full path should be constructed by lond, not
4415: ## whatever machine we request data from.
4416: ##
4417: sub GetFileTimestamp {
4418: my ($studentDomain,$studentName,$filename,$root)=@_;
4419: $studentDomain=~s/\W//g;
4420: $studentName=~s/\W//g;
4421: my $subdir=$studentName.'__';
4422: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4423: my $proname="$studentDomain/$subdir/$studentName";
4424: $proname .= '/'.$filename;
4425: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
4426: $studentName, $root);
4427: my @stats = split('&', $fileStat);
4428: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4429: # @stats contains first the filename, then the stat output
4430: return $stats[10]; # so this is 10 instead of 9.
4431: } else {
4432: return -1;
4433: }
4434: }
4435:
4436: # -------------------------------------------------------- Value of a Condition
4437:
4438: sub directcondval {
4439: my $number=shift;
4440: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
4441: &Apache::lonuserstate::evalstate();
4442: }
4443: if ($env{'user.state.'.$env{'request.course.id'}}) {
4444: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
4445: } else {
4446: return 2;
4447: }
4448: }
4449:
4450: sub condval {
4451: my $condidx=shift;
4452: my $result=0;
4453: my $allpathcond='';
4454: foreach (split(/\|/,$condidx)) {
4455: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$_})) {
4456: $allpathcond.=
4457: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$_}.')|';
4458: }
4459: }
4460: $allpathcond=~s/\|$//;
4461: if ($env{'request.course.id'}) {
4462: if ($allpathcond) {
4463: my $operand='|';
4464: my @stack;
4465: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
4466: if ($_ eq '(') {
4467: push @stack,($operand,$result)
4468: } elsif ($_ eq ')') {
4469: my $before=pop @stack;
4470: if (pop @stack eq '&') {
4471: $result=$result>$before?$before:$result;
4472: } else {
4473: $result=$result>$before?$result:$before;
4474: }
4475: } elsif (($_ eq '&') || ($_ eq '|')) {
4476: $operand=$_;
4477: } else {
4478: my $new=directcondval($_);
4479: if ($operand eq '&') {
4480: $result=$result>$new?$new:$result;
4481: } else {
4482: $result=$result>$new?$result:$new;
4483: }
4484: }
4485: }
4486: }
4487: }
4488: return $result;
4489: }
4490:
4491: # ---------------------------------------------------- Devalidate courseresdata
4492:
4493: sub devalidatecourseresdata {
4494: my ($coursenum,$coursedomain)=@_;
4495: my $hashid=$coursenum.':'.$coursedomain;
4496: &devalidate_cache_new('courseres',$hashid);
4497: }
4498:
4499: # --------------------------------------------------- Course Resourcedata Query
4500:
4501: sub get_courseresdata {
4502: my ($coursenum,$coursedomain)=@_;
4503: my $coursehom=&homeserver($coursenum,$coursedomain);
4504: my $hashid=$coursenum.':'.$coursedomain;
4505: my ($result,$cached)=&is_cached_new('courseres',$hashid);
4506: my %dumpreply;
4507: unless (defined($cached)) {
4508: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
4509: $result=\%dumpreply;
4510: my ($tmp) = keys(%dumpreply);
4511: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
4512: &do_cache_new('courseres',$hashid,$result,600);
4513: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4514: return $tmp;
4515: } elsif ($tmp =~ /^(error)/) {
4516: $result=undef;
4517: &do_cache_new('courseres',$hashid,$result,600);
4518: }
4519: }
4520: return $result;
4521: }
4522:
4523: sub devalidateuserresdata {
4524: my ($uname,$udom)=@_;
4525: my $hashid="$udom:$uname";
4526: &devalidate_cache_new('userres',$hashid);
4527: }
4528:
4529: sub get_userresdata {
4530: my ($uname,$udom)=@_;
4531: #most student don\'t have any data set, check if there is some data
4532: if (&EXT_cache_status($udom,$uname)) { return undef; }
4533:
4534: my $hashid="$udom:$uname";
4535: my ($result,$cached)=&is_cached_new('userres',$hashid);
4536: if (!defined($cached)) {
4537: my %resourcedata=&dump('resourcedata',$udom,$uname);
4538: $result=\%resourcedata;
4539: &do_cache_new('userres',$hashid,$result,600);
4540: }
4541: my ($tmp)=keys(%$result);
4542: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4543: return $result;
4544: }
4545: #error 2 occurs when the .db doesn't exist
4546: if ($tmp!~/error: 2 /) {
4547: &logthis("<font color=\"blue\">WARNING:".
4548: " Trying to get resource data for ".
4549: $uname." at ".$udom.": ".
4550: $tmp."</font>");
4551: } elsif ($tmp=~/error: 2 /) {
4552: #&EXT_cache_set($udom,$uname);
4553: &do_cache_new('userres',$hashid,undef,600);
4554: undef($tmp); # not really an error so don't send it back
4555: }
4556: return $tmp;
4557: }
4558:
4559: sub resdata {
4560: my ($name,$domain,$type,@which)=@_;
4561: my $result;
4562: if ($type eq 'course') {
4563: $result=&get_courseresdata($name,$domain);
4564: } elsif ($type eq 'user') {
4565: $result=&get_userresdata($name,$domain);
4566: }
4567: if (!ref($result)) { return $result; }
4568: foreach my $item (@which) {
4569: if (defined($result->{$item})) {
4570: return $result->{$item};
4571: }
4572: }
4573: return undef;
4574: }
4575:
4576: #
4577: # EXT resource caching routines
4578: #
4579:
4580: sub clear_EXT_cache_status {
4581: &delenv('cache.EXT.');
4582: }
4583:
4584: sub EXT_cache_status {
4585: my ($target_domain,$target_user) = @_;
4586: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4587: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
4588: # We know already the user has no data
4589: return 1;
4590: } else {
4591: return 0;
4592: }
4593: }
4594:
4595: sub EXT_cache_set {
4596: my ($target_domain,$target_user) = @_;
4597: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4598: #&appenv($cachename => time);
4599: }
4600:
4601: # --------------------------------------------------------- Value of a Variable
4602: sub EXT {
4603: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
4604:
4605: unless ($varname) { return ''; }
4606: #get real user name/domain, courseid and symb
4607: my $courseid;
4608: my $publicuser;
4609: if ($symbparm) {
4610: $symbparm=&get_symb_from_alias($symbparm);
4611: }
4612: if (!($uname && $udom)) {
4613: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
4614: &Apache::lonxml::whichuser($symbparm);
4615: if (!$symbparm) { $symbparm=$cursymb; }
4616: } else {
4617: $courseid=$env{'request.course.id'};
4618: }
4619: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
4620: my $rest;
4621: if (defined($therest[0])) {
4622: $rest=join('.',@therest);
4623: } else {
4624: $rest='';
4625: }
4626:
4627: my $qualifierrest=$qualifier;
4628: if ($rest) { $qualifierrest.='.'.$rest; }
4629: my $spacequalifierrest=$space;
4630: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
4631: if ($realm eq 'user') {
4632: # --------------------------------------------------------------- user.resource
4633: if ($space eq 'resource') {
4634: if ( (defined($Apache::lonhomework::parsing_a_problem)
4635: || defined($Apache::lonhomework::parsing_a_task))
4636: &&
4637: ($symbparm eq &symbread()) ) {
4638: return $Apache::lonhomework::history{$qualifierrest};
4639: } else {
4640: my %restored;
4641: if ($publicuser || $env{'request.state'} eq 'construct') {
4642: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
4643: } else {
4644: %restored=&restore($symbparm,$courseid,$udom,$uname);
4645: }
4646: return $restored{$qualifierrest};
4647: }
4648: # ----------------------------------------------------------------- user.access
4649: } elsif ($space eq 'access') {
4650: # FIXME - not supporting calls for a specific user
4651: return &allowed($qualifier,$rest);
4652: # ------------------------------------------ user.preferences, user.environment
4653: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
4654: if (($uname eq $env{'user.name'}) &&
4655: ($udom eq $env{'user.domain'})) {
4656: return $env{join('.',('environment',$qualifierrest))};
4657: } else {
4658: my %returnhash;
4659: if (!$publicuser) {
4660: %returnhash=&userenvironment($udom,$uname,
4661: $qualifierrest);
4662: }
4663: return $returnhash{$qualifierrest};
4664: }
4665: # ----------------------------------------------------------------- user.course
4666: } elsif ($space eq 'course') {
4667: # FIXME - not supporting calls for a specific user
4668: return $env{join('.',('request.course',$qualifier))};
4669: # ------------------------------------------------------------------- user.role
4670: } elsif ($space eq 'role') {
4671: # FIXME - not supporting calls for a specific user
4672: my ($role,$where)=split(/\./,$env{'request.role'});
4673: if ($qualifier eq 'value') {
4674: return $role;
4675: } elsif ($qualifier eq 'extent') {
4676: return $where;
4677: }
4678: # ----------------------------------------------------------------- user.domain
4679: } elsif ($space eq 'domain') {
4680: return $udom;
4681: # ------------------------------------------------------------------- user.name
4682: } elsif ($space eq 'name') {
4683: return $uname;
4684: # ---------------------------------------------------- Any other user namespace
4685: } else {
4686: my %reply;
4687: if (!$publicuser) {
4688: %reply=&get($space,[$qualifierrest],$udom,$uname);
4689: }
4690: return $reply{$qualifierrest};
4691: }
4692: } elsif ($realm eq 'query') {
4693: # ---------------------------------------------- pull stuff out of query string
4694: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
4695: [$spacequalifierrest]);
4696: return $env{'form.'.$spacequalifierrest};
4697: } elsif ($realm eq 'request') {
4698: # ------------------------------------------------------------- request.browser
4699: if ($space eq 'browser') {
4700: if ($qualifier eq 'textremote') {
4701: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
4702: return 1;
4703: } else {
4704: return 0;
4705: }
4706: } else {
4707: return $env{'browser.'.$qualifier};
4708: }
4709: # ------------------------------------------------------------ request.filename
4710: } else {
4711: return $env{'request.'.$spacequalifierrest};
4712: }
4713: } elsif ($realm eq 'course') {
4714: # ---------------------------------------------------------- course.description
4715: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
4716: } elsif ($realm eq 'resource') {
4717:
4718: my $section;
4719: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
4720: if (!$symbparm) { $symbparm=&symbread(); }
4721: }
4722: my ($courselevelm,$courselevel);
4723: if ($symbparm && defined($courseid) &&
4724: $courseid eq $env{'request.course.id'}) {
4725:
4726: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
4727:
4728: # ----------------------------------------------------- Cascading lookup scheme
4729: my $symbp=$symbparm;
4730: my $mapp=(&decode_symb($symbp))[0];
4731:
4732: my $symbparm=$symbp.'.'.$spacequalifierrest;
4733: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
4734:
4735: if (($env{'user.name'} eq $uname) &&
4736: ($env{'user.domain'} eq $udom)) {
4737: $section=$env{'request.course.sec'};
4738: } else {
4739: if (! defined($usection)) {
4740: $section=&getsection($udom,$uname,$courseid);
4741: } else {
4742: $section = $usection;
4743: }
4744: }
4745:
4746: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
4747: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
4748: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
4749:
4750: $courselevel=$courseid.'.'.$spacequalifierrest;
4751: my $courselevelr=$courseid.'.'.$symbparm;
4752: $courselevelm=$courseid.'.'.$mapparm;
4753:
4754: # ----------------------------------------------------------- first, check user
4755:
4756: my $userreply=&resdata($uname,$udom,'user',
4757: ($courselevelr,$courselevelm,
4758: $courselevel));
4759:
4760: if (defined($userreply)) { return $userreply; }
4761:
4762: # ------------------------------------------------ second, check some of course
4763:
4764: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
4765: $env{'course.'.$courseid.'.domain'},
4766: 'course',
4767: ($seclevelr,$seclevelm,$seclevel,
4768: $courselevelr));
4769: if (defined($coursereply)) { return $coursereply; }
4770:
4771: # ------------------------------------------------------ third, check map parms
4772: my %parmhash=();
4773: my $thisparm='';
4774: if (tie(%parmhash,'GDBM_File',
4775: $env{'request.course.fn'}.'_parms.db',
4776: &GDBM_READER(),0640)) {
4777: $thisparm=$parmhash{$symbparm};
4778: untie(%parmhash);
4779: }
4780: if ($thisparm) { return $thisparm; }
4781: }
4782: # ------------------------------------------ fourth, look in resource metadata
4783:
4784: $spacequalifierrest=~s/\./\_/;
4785: my $filename;
4786: if (!$symbparm) { $symbparm=&symbread(); }
4787: if ($symbparm) {
4788: $filename=(&decode_symb($symbparm))[2];
4789: } else {
4790: $filename=$env{'request.filename'};
4791: }
4792: my $metadata=&metadata($filename,$spacequalifierrest);
4793: if (defined($metadata)) { return $metadata; }
4794: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
4795: if (defined($metadata)) { return $metadata; }
4796:
4797: # ---------------------------------------------- fourth, look in rest pf course
4798: if ($symbparm && defined($courseid) &&
4799: $courseid eq $env{'request.course.id'}) {
4800: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
4801: $env{'course.'.$courseid.'.domain'},
4802: 'course',
4803: ($courselevelm,$courselevel));
4804: if (defined($coursereply)) { return $coursereply; }
4805: }
4806: # ------------------------------------------------------------------ Cascade up
4807: unless ($space eq '0') {
4808: my @parts=split(/_/,$space);
4809: my $id=pop(@parts);
4810: my $part=join('_',@parts);
4811: if ($part eq '') { $part='0'; }
4812: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
4813: $symbparm,$udom,$uname,$section,1);
4814: if (defined($partgeneral)) { return $partgeneral; }
4815: }
4816: if ($recurse) { return undef; }
4817: my $pack_def=&packages_tab_default($filename,$varname);
4818: if (defined($pack_def)) { return $pack_def; }
4819:
4820: # ---------------------------------------------------- Any other user namespace
4821: } elsif ($realm eq 'environment') {
4822: # ----------------------------------------------------------------- environment
4823: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
4824: return $env{'environment.'.$spacequalifierrest};
4825: } else {
4826: my %returnhash=&userenvironment($udom,$uname,
4827: $spacequalifierrest);
4828: return $returnhash{$spacequalifierrest};
4829: }
4830: } elsif ($realm eq 'system') {
4831: # ----------------------------------------------------------------- system.time
4832: if ($space eq 'time') {
4833: return time;
4834: }
4835: }
4836: return '';
4837: }
4838:
4839: sub packages_tab_default {
4840: my ($uri,$varname)=@_;
4841: my (undef,$part,$name)=split(/\./,$varname);
4842: my $packages=&metadata($uri,'packages');
4843: foreach my $package (split(/,/,$packages)) {
4844: my ($pack_type,$pack_part)=split(/_/,$package,2);
4845: if (defined($packagetab{"$pack_type&$name&default"})) {
4846: return $packagetab{"$pack_type&$name&default"};
4847: }
4848: if ($pack_type eq 'part') { $pack_part='0'; }
4849: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
4850: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
4851: }
4852: }
4853: return undef;
4854: }
4855:
4856: sub add_prefix_and_part {
4857: my ($prefix,$part)=@_;
4858: my $keyroot;
4859: if (defined($prefix) && $prefix !~ /^__/) {
4860: # prefix that has a part already
4861: $keyroot=$prefix;
4862: } elsif (defined($prefix)) {
4863: # prefix that is missing a part
4864: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
4865: } else {
4866: # no prefix at all
4867: if (defined($part)) { $keyroot='_'.$part; }
4868: }
4869: return $keyroot;
4870: }
4871:
4872: # ---------------------------------------------------------------- Get metadata
4873:
4874: my %metaentry;
4875: sub metadata {
4876: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
4877: $uri=&declutter($uri);
4878: # if it is a non metadata possible uri return quickly
4879: if (($uri eq '') ||
4880: (($uri =~ m|^/*adm/|) &&
4881: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
4882: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
4883: ($uri =~ m|home/[^/]+/public_html/|)) {
4884: return undef;
4885: }
4886: my $filename=$uri;
4887: $uri=~s/\.meta$//;
4888: #
4889: # Is the metadata already cached?
4890: # Look at timestamp of caching
4891: # Everything is cached by the main uri, libraries are never directly cached
4892: #
4893: if (!defined($liburi)) {
4894: my ($result,$cached)=&is_cached_new('meta',$uri);
4895: if (defined($cached)) { return $result->{':'.$what}; }
4896: }
4897: {
4898: #
4899: # Is this a recursive call for a library?
4900: #
4901: # if (! exists($metacache{$uri})) {
4902: # $metacache{$uri}={};
4903: # }
4904: if ($liburi) {
4905: $liburi=&declutter($liburi);
4906: $filename=$liburi;
4907: } else {
4908: &devalidate_cache_new('meta',$uri);
4909: undef(%metaentry);
4910: }
4911: my %metathesekeys=();
4912: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
4913: my $metastring;
4914: if ($uri !~ m -^(uploaded|editupload)/-) {
4915: my $file=&filelocation('',&clutter($filename));
4916: #push(@{$metaentry{$uri.'.file'}},$file);
4917: $metastring=&getfile($file);
4918: }
4919: my $parser=HTML::LCParser->new(\$metastring);
4920: my $token;
4921: undef %metathesekeys;
4922: while ($token=$parser->get_token) {
4923: if ($token->[0] eq 'S') {
4924: if (defined($token->[2]->{'package'})) {
4925: #
4926: # This is a package - get package info
4927: #
4928: my $package=$token->[2]->{'package'};
4929: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4930: if (defined($token->[2]->{'id'})) {
4931: $keyroot.='_'.$token->[2]->{'id'};
4932: }
4933: if ($metaentry{':packages'}) {
4934: $metaentry{':packages'}.=','.$package.$keyroot;
4935: } else {
4936: $metaentry{':packages'}=$package.$keyroot;
4937: }
4938: foreach (sort keys %packagetab) {
4939: my $part=$keyroot;
4940: $part=~s/^\_//;
4941: if ($_=~/^\Q$package\E\&/ ||
4942: $_=~/^\Q$package\E_0\&/) {
4943: my ($pack,$name,$subp)=split(/\&/,$_);
4944: # ignore package.tab specified default values
4945: # here &package_tab_default() will fetch those
4946: if ($subp eq 'default') { next; }
4947: my $value=$packagetab{$_};
4948: my $unikey;
4949: if ($pack =~ /_0$/) {
4950: $unikey='parameter_0_'.$name;
4951: $part=0;
4952: } else {
4953: $unikey='parameter'.$keyroot.'_'.$name;
4954: }
4955: if ($subp eq 'display') {
4956: $value.=' [Part: '.$part.']';
4957: }
4958: $metaentry{':'.$unikey.'.part'}=$part;
4959: $metathesekeys{$unikey}=1;
4960: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
4961: $metaentry{':'.$unikey.'.'.$subp}=$value;
4962: }
4963: if (defined($metaentry{':'.$unikey.'.default'})) {
4964: $metaentry{':'.$unikey}=
4965: $metaentry{':'.$unikey.'.default'};
4966: }
4967: }
4968: }
4969: } else {
4970: #
4971: # This is not a package - some other kind of start tag
4972: #
4973: my $entry=$token->[1];
4974: my $unikey;
4975: if ($entry eq 'import') {
4976: $unikey='';
4977: } else {
4978: $unikey=$entry;
4979: }
4980: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4981:
4982: if (defined($token->[2]->{'id'})) {
4983: $unikey.='_'.$token->[2]->{'id'};
4984: }
4985:
4986: if ($entry eq 'import') {
4987: #
4988: # Importing a library here
4989: #
4990: if ($depthcount<20) {
4991: my $location=$parser->get_text('/import');
4992: my $dir=$filename;
4993: $dir=~s|[^/]*$||;
4994: $location=&filelocation($dir,$location);
4995: foreach (sort(split(/\,/,&metadata($uri,'keys',
4996: $location,$unikey,
4997: $depthcount+1)))) {
4998: $metaentry{':'.$_}=$metaentry{':'.$_};
4999: $metathesekeys{$_}=1;
5000: }
5001: }
5002: } else {
5003:
5004: if (defined($token->[2]->{'name'})) {
5005: $unikey.='_'.$token->[2]->{'name'};
5006: }
5007: $metathesekeys{$unikey}=1;
5008: foreach (@{$token->[3]}) {
5009: $metaentry{':'.$unikey.'.'.$_}=$token->[2]->{$_};
5010: }
5011: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
5012: my $default=$metaentry{':'.$unikey.'.default'};
5013: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
5014: # only ws inside the tag, and not in default, so use default
5015: # as value
5016: $metaentry{':'.$unikey}=$default;
5017: } else {
5018: # either something interesting inside the tag or default
5019: # uninteresting
5020: $metaentry{':'.$unikey}=$internaltext;
5021: }
5022: # end of not-a-package not-a-library import
5023: }
5024: # end of not-a-package start tag
5025: }
5026: # the next is the end of "start tag"
5027: }
5028: }
5029: my ($extension) = ($uri =~ /\.(\w+)$/);
5030: foreach my $key (sort(keys(%packagetab))) {
5031: #no specific packages #how's our extension
5032: if ($key!~/^extension_\Q$extension\E&/) { next; }
5033: &metadata_create_package_def($uri,$key,'extension_'.$extension,
5034: \%metathesekeys);
5035: }
5036: if (!exists($metaentry{':packages'})) {
5037: foreach my $key (sort(keys(%packagetab))) {
5038: #no specific packages well let's get default then
5039: if ($key!~/^default&/) { next; }
5040: &metadata_create_package_def($uri,$key,'default',
5041: \%metathesekeys);
5042: }
5043: }
5044: # are there custom rights to evaluate
5045: if ($metaentry{':copyright'} eq 'custom') {
5046:
5047: #
5048: # Importing a rights file here
5049: #
5050: unless ($depthcount) {
5051: my $location=$metaentry{':customdistributionfile'};
5052: my $dir=$filename;
5053: $dir=~s|[^/]*$||;
5054: $location=&filelocation($dir,$location);
5055: foreach (sort(split(/\,/,&metadata($uri,'keys',
5056: $location,'_rights',
5057: $depthcount+1)))) {
5058: #$metaentry{':'.$_}=$metacache{$uri}->{':'.$_};
5059: $metathesekeys{$_}=1;
5060: }
5061: }
5062: }
5063: $metaentry{':keys'}=join(',',keys %metathesekeys);
5064: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
5065: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
5066: &do_cache_new('meta',$uri,\%metaentry,60*60*24);
5067: # this is the end of "was not already recently cached
5068: }
5069: return $metaentry{':'.$what};
5070: }
5071:
5072: sub metadata_create_package_def {
5073: my ($uri,$key,$package,$metathesekeys)=@_;
5074: my ($pack,$name,$subp)=split(/\&/,$key);
5075: if ($subp eq 'default') { next; }
5076:
5077: if (defined($metaentry{':packages'})) {
5078: $metaentry{':packages'}.=','.$package;
5079: } else {
5080: $metaentry{':packages'}=$package;
5081: }
5082: my $value=$packagetab{$key};
5083: my $unikey;
5084: $unikey='parameter_0_'.$name;
5085: $metaentry{':'.$unikey.'.part'}=0;
5086: $$metathesekeys{$unikey}=1;
5087: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
5088: $metaentry{':'.$unikey.'.'.$subp}=$value;
5089: }
5090: if (defined($metaentry{':'.$unikey.'.default'})) {
5091: $metaentry{':'.$unikey}=
5092: $metaentry{':'.$unikey.'.default'};
5093: }
5094: }
5095:
5096: sub metadata_generate_part0 {
5097: my ($metadata,$metacache,$uri) = @_;
5098: my %allnames;
5099: foreach my $metakey (sort keys %$metadata) {
5100: if ($metakey=~/^parameter\_(.*)/) {
5101: my $part=$$metacache{':'.$metakey.'.part'};
5102: my $name=$$metacache{':'.$metakey.'.name'};
5103: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
5104: $allnames{$name}=$part;
5105: }
5106: }
5107: }
5108: foreach my $name (keys(%allnames)) {
5109: $$metadata{"parameter_0_$name"}=1;
5110: my $key=":parameter_0_$name";
5111: $$metacache{"$key.part"}='0';
5112: $$metacache{"$key.name"}=$name;
5113: $$metacache{"$key.type"}=$$metacache{':parameter_'.
5114: $allnames{$name}.'_'.$name.
5115: '.type'};
5116: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
5117: '.display'};
5118: my $expr='[Part: '.$allnames{$name}.']';
5119: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
5120: $$metacache{"$key.display"}=$olddis;
5121: }
5122: }
5123:
5124: # ------------------------------------------------- Get the title of a resource
5125:
5126: sub gettitle {
5127: my $urlsymb=shift;
5128: my $symb=&symbread($urlsymb);
5129: if ($symb) {
5130: my $key=$env{'request.course.id'}."\0".$symb;
5131: my ($result,$cached)=&is_cached_new('title',$key);
5132: if (defined($cached)) {
5133: return $result;
5134: }
5135: my ($map,$resid,$url)=&decode_symb($symb);
5136: my $title='';
5137: my %bighash;
5138: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5139: &GDBM_READER(),0640)) {
5140: my $mapid=$bighash{'map_pc_'.&clutter($map)};
5141: $title=$bighash{'title_'.$mapid.'.'.$resid};
5142: untie %bighash;
5143: }
5144: $title=~s/\&colon\;/\:/gs;
5145: if ($title) {
5146: return &do_cache_new('title',$key,$title,600);
5147: }
5148: $urlsymb=$url;
5149: }
5150: my $title=&metadata($urlsymb,'title');
5151: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
5152: return $title;
5153: }
5154:
5155: sub get_slot {
5156: my ($which,$cnum,$cdom)=@_;
5157: if (!$cnum || !$cdom) {
5158: (undef,my $courseid)=&Apache::lonxml::whichuser();
5159: $cdom=$env{'course.'.$courseid.'.domain'};
5160: $cnum=$env{'course.'.$courseid.'.num'};
5161: }
5162: my %slotinfo=&get('slots',[$which],$cdom,$cnum);
5163: &Apache::lonhomework::showhash(%slotinfo);
5164: my ($tmp)=keys(%slotinfo);
5165: if ($tmp=~/^error:/) { return (); }
5166: if (ref($slotinfo{$which}) eq 'HASH') {
5167: return %{$slotinfo{$which}};
5168: }
5169: return $slotinfo{$which};
5170: }
5171: # ------------------------------------------------- Update symbolic store links
5172:
5173: sub symblist {
5174: my ($mapname,%newhash)=@_;
5175: $mapname=&deversion(&declutter($mapname));
5176: my %hash;
5177: if (($env{'request.course.fn'}) && (%newhash)) {
5178: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5179: &GDBM_WRCREAT(),0640)) {
5180: foreach (keys %newhash) {
5181: $hash{declutter($_)}=&encode_symb($mapname,$newhash{$_}->[1],
5182: $newhash{$_}->[0]);
5183: }
5184: if (untie(%hash)) {
5185: return 'ok';
5186: }
5187: }
5188: }
5189: return 'error';
5190: }
5191:
5192: # --------------------------------------------------------------- Verify a symb
5193:
5194: sub symbverify {
5195: my ($symb,$thisurl)=@_;
5196: my $thisfn=$thisurl;
5197: # wrapper not part of symbs
5198: $thisfn=~s/^\/adm\/wrapper//;
5199: $thisfn=&declutter($thisfn);
5200: # direct jump to resource in page or to a sequence - will construct own symbs
5201: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
5202: # check URL part
5203: my ($map,$resid,$url)=&decode_symb($symb);
5204:
5205: unless ($url eq $thisfn) { return 0; }
5206:
5207: $symb=&symbclean($symb);
5208: $thisurl=&deversion($thisurl);
5209: $thisfn=&deversion($thisfn);
5210:
5211: my %bighash;
5212: my $okay=0;
5213:
5214: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5215: &GDBM_READER(),0640)) {
5216: my $ids=$bighash{'ids_'.&clutter($thisurl)};
5217: unless ($ids) {
5218: $ids=$bighash{'ids_/'.$thisurl};
5219: }
5220: if ($ids) {
5221: # ------------------------------------------------------------------- Has ID(s)
5222: foreach (split(/\,/,$ids)) {
5223: my ($mapid,$resid)=split(/\./,$_);
5224: if (
5225: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
5226: eq $symb) {
5227: if (($env{'request.role.adv'}) ||
5228: $bighash{'encrypted_'.$_} eq $env{'request.enc'}) {
5229: $okay=1;
5230: }
5231: }
5232: }
5233: }
5234: untie(%bighash);
5235: }
5236: return $okay;
5237: }
5238:
5239: # --------------------------------------------------------------- Clean-up symb
5240:
5241: sub symbclean {
5242: my $symb=shift;
5243: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
5244: # remove version from map
5245: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
5246:
5247: # remove version from URL
5248: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
5249:
5250: # remove wrapper
5251:
5252: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
5253: return $symb;
5254: }
5255:
5256: # ---------------------------------------------- Split symb to find map and url
5257:
5258: sub encode_symb {
5259: my ($map,$resid,$url)=@_;
5260: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
5261: }
5262:
5263: sub decode_symb {
5264: my $symb=shift;
5265: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
5266: my ($map,$resid,$url)=split(/___/,$symb);
5267: return (&fixversion($map),$resid,&fixversion($url));
5268: }
5269:
5270: sub fixversion {
5271: my $fn=shift;
5272: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
5273: my %bighash;
5274: my $uri=&clutter($fn);
5275: my $key=$env{'request.course.id'}.'_'.$uri;
5276: # is this cached?
5277: my ($result,$cached)=&is_cached_new('courseresversion',$key);
5278: if (defined($cached)) { return $result; }
5279: # unfortunately not cached, or expired
5280: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5281: &GDBM_READER(),0640)) {
5282: if ($bighash{'version_'.$uri}) {
5283: my $version=$bighash{'version_'.$uri};
5284: unless (($version eq 'mostrecent') ||
5285: ($version==&getversion($uri))) {
5286: $uri=~s/\.(\w+)$/\.$version\.$1/;
5287: }
5288: }
5289: untie %bighash;
5290: }
5291: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
5292: }
5293:
5294: sub deversion {
5295: my $url=shift;
5296: $url=~s/\.\d+\.(\w+)$/\.$1/;
5297: return $url;
5298: }
5299:
5300: # ------------------------------------------------------ Return symb list entry
5301:
5302: sub symbread {
5303: my ($thisfn,$donotrecurse)=@_;
5304: my $cache_str='request.symbread.cached.'.$thisfn;
5305: if (defined($env{$cache_str})) { return $env{$cache_str}; }
5306: # no filename provided? try from environment
5307: unless ($thisfn) {
5308: if ($env{'request.symb'}) {
5309: return $env{$cache_str}=&symbclean($env{'request.symb'});
5310: }
5311: $thisfn=$env{'request.filename'};
5312: }
5313: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
5314: # is that filename actually a symb? Verify, clean, and return
5315: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
5316: if (&symbverify($thisfn,$1)) {
5317: return $env{$cache_str}=&symbclean($thisfn);
5318: }
5319: }
5320: $thisfn=declutter($thisfn);
5321: my %hash;
5322: my %bighash;
5323: my $syval='';
5324: if (($env{'request.course.fn'}) && ($thisfn)) {
5325: my $targetfn = $thisfn;
5326: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
5327: $targetfn = 'adm/wrapper/'.$thisfn;
5328: }
5329: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5330: &GDBM_READER(),0640)) {
5331: $syval=$hash{$targetfn};
5332: untie(%hash);
5333: }
5334: # ---------------------------------------------------------- There was an entry
5335: if ($syval) {
5336: #unless ($syval=~/\_\d+$/) {
5337: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
5338: #&appenv('request.ambiguous' => $thisfn);
5339: #return $env{$cache_str}='';
5340: #}
5341: #$syval.=$1;
5342: #}
5343: } else {
5344: # ------------------------------------------------------- Was not in symb table
5345: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5346: &GDBM_READER(),0640)) {
5347: # ---------------------------------------------- Get ID(s) for current resource
5348: my $ids=$bighash{'ids_'.&clutter($thisfn)};
5349: unless ($ids) {
5350: $ids=$bighash{'ids_/'.$thisfn};
5351: }
5352: unless ($ids) {
5353: # alias?
5354: $ids=$bighash{'mapalias_'.$thisfn};
5355: }
5356: if ($ids) {
5357: # ------------------------------------------------------------------- Has ID(s)
5358: my @possibilities=split(/\,/,$ids);
5359: if ($#possibilities==0) {
5360: # ----------------------------------------------- There is only one possibility
5361: my ($mapid,$resid)=split(/\./,$ids);
5362: $syval=&encode_symb($bighash{'map_id_'.$mapid},
5363: $resid,$thisfn);
5364: } elsif (!$donotrecurse) {
5365: # ------------------------------------------ There is more than one possibility
5366: my $realpossible=0;
5367: foreach (@possibilities) {
5368: my $file=$bighash{'src_'.$_};
5369: if (&allowed('bre',$file)) {
5370: my ($mapid,$resid)=split(/\./,$_);
5371: if ($bighash{'map_type_'.$mapid} ne 'page') {
5372: $realpossible++;
5373: $syval=&encode_symb($bighash{'map_id_'.$mapid},
5374: $resid,$thisfn);
5375: }
5376: }
5377: }
5378: if ($realpossible!=1) { $syval=''; }
5379: } else {
5380: $syval='';
5381: }
5382: }
5383: untie(%bighash)
5384: }
5385: }
5386: if ($syval) {
5387: return $env{$cache_str}=$syval;
5388: }
5389: }
5390: &appenv('request.ambiguous' => $thisfn);
5391: return $env{$cache_str}='';
5392: }
5393:
5394: # ---------------------------------------------------------- Return random seed
5395:
5396: sub numval {
5397: my $txt=shift;
5398: $txt=~tr/A-J/0-9/;
5399: $txt=~tr/a-j/0-9/;
5400: $txt=~tr/K-T/0-9/;
5401: $txt=~tr/k-t/0-9/;
5402: $txt=~tr/U-Z/0-5/;
5403: $txt=~tr/u-z/0-5/;
5404: $txt=~s/\D//g;
5405: if ($_64bit) { if ($txt > 2**32) { return -1; } }
5406: return int($txt);
5407: }
5408:
5409: sub numval2 {
5410: my $txt=shift;
5411: $txt=~tr/A-J/0-9/;
5412: $txt=~tr/a-j/0-9/;
5413: $txt=~tr/K-T/0-9/;
5414: $txt=~tr/k-t/0-9/;
5415: $txt=~tr/U-Z/0-5/;
5416: $txt=~tr/u-z/0-5/;
5417: $txt=~s/\D//g;
5418: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5419: my $total;
5420: foreach my $val (@txts) { $total+=$val; }
5421: if ($_64bit) { if ($total > 2**32) { return -1; } }
5422: return int($total);
5423: }
5424:
5425: sub numval3 {
5426: use integer;
5427: my $txt=shift;
5428: $txt=~tr/A-J/0-9/;
5429: $txt=~tr/a-j/0-9/;
5430: $txt=~tr/K-T/0-9/;
5431: $txt=~tr/k-t/0-9/;
5432: $txt=~tr/U-Z/0-5/;
5433: $txt=~tr/u-z/0-5/;
5434: $txt=~s/\D//g;
5435: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5436: my $total;
5437: foreach my $val (@txts) { $total+=$val; }
5438: if ($_64bit) { $total=(($total<<32)>>32); }
5439: return $total;
5440: }
5441:
5442: sub digest {
5443: my ($data)=@_;
5444: my $digest=&Digest::MD5::md5($data);
5445: my ($a,$b,$c,$d)=unpack("iiii",$digest);
5446: my ($e,$f);
5447: {
5448: use integer;
5449: $e=($a+$b);
5450: $f=($c+$d);
5451: if ($_64bit) {
5452: $e=(($e<<32)>>32);
5453: $f=(($f<<32)>>32);
5454: }
5455: }
5456: if (wantarray) {
5457: return ($e,$f);
5458: } else {
5459: my $g;
5460: {
5461: use integer;
5462: $g=($e+$f);
5463: if ($_64bit) {
5464: $g=(($g<<32)>>32);
5465: }
5466: }
5467: return $g;
5468: }
5469: }
5470:
5471: sub latest_rnd_algorithm_id {
5472: return '64bit5';
5473: }
5474:
5475: sub get_rand_alg {
5476: my ($courseid)=@_;
5477: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
5478: if ($courseid) {
5479: return $env{"course.$courseid.rndseed"};
5480: }
5481: return &latest_rnd_algorithm_id();
5482: }
5483:
5484: sub validCODE {
5485: my ($CODE)=@_;
5486: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
5487: return 0;
5488: }
5489:
5490: sub getCODE {
5491: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
5492: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
5493: defined($Apache::lonhomework::parsing_a_task) ) &&
5494: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
5495: return $Apache::lonhomework::history{'resource.CODE'};
5496: }
5497: return undef;
5498: }
5499:
5500: sub rndseed {
5501: my ($symb,$courseid,$domain,$username)=@_;
5502:
5503: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
5504: if (!$symb) {
5505: unless ($symb=$wsymb) { return time; }
5506: }
5507: if (!$courseid) { $courseid=$wcourseid; }
5508: if (!$domain) { $domain=$wdomain; }
5509: if (!$username) { $username=$wusername }
5510: my $which=&get_rand_alg();
5511: if (defined(&getCODE())) {
5512: if ($which eq '64bit5') {
5513: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
5514: } elsif ($which eq '64bit4') {
5515: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
5516: } else {
5517: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
5518: }
5519: } elsif ($which eq '64bit5') {
5520: return &rndseed_64bit5($symb,$courseid,$domain,$username);
5521: } elsif ($which eq '64bit4') {
5522: return &rndseed_64bit4($symb,$courseid,$domain,$username);
5523: } elsif ($which eq '64bit3') {
5524: return &rndseed_64bit3($symb,$courseid,$domain,$username);
5525: } elsif ($which eq '64bit2') {
5526: return &rndseed_64bit2($symb,$courseid,$domain,$username);
5527: } elsif ($which eq '64bit') {
5528: return &rndseed_64bit($symb,$courseid,$domain,$username);
5529: }
5530: return &rndseed_32bit($symb,$courseid,$domain,$username);
5531: }
5532:
5533: sub rndseed_32bit {
5534: my ($symb,$courseid,$domain,$username)=@_;
5535: {
5536: use integer;
5537: my $symbchck=unpack("%32C*",$symb) << 27;
5538: my $symbseed=numval($symb) << 22;
5539: my $namechck=unpack("%32C*",$username) << 17;
5540: my $nameseed=numval($username) << 12;
5541: my $domainseed=unpack("%32C*",$domain) << 7;
5542: my $courseseed=unpack("%32C*",$courseid);
5543: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
5544: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5545: #&Apache::lonxml::debug("rndseed :$num:$symb");
5546: if ($_64bit) { $num=(($num<<32)>>32); }
5547: return $num;
5548: }
5549: }
5550:
5551: sub rndseed_64bit {
5552: my ($symb,$courseid,$domain,$username)=@_;
5553: {
5554: use integer;
5555: my $symbchck=unpack("%32S*",$symb) << 21;
5556: my $symbseed=numval($symb) << 10;
5557: my $namechck=unpack("%32S*",$username);
5558:
5559: my $nameseed=numval($username) << 21;
5560: my $domainseed=unpack("%32S*",$domain) << 10;
5561: my $courseseed=unpack("%32S*",$courseid);
5562:
5563: my $num1=$symbchck+$symbseed+$namechck;
5564: my $num2=$nameseed+$domainseed+$courseseed;
5565: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5566: #&Apache::lonxml::debug("rndseed :$num:$symb");
5567: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5568: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5569: return "$num1,$num2";
5570: }
5571: }
5572:
5573: sub rndseed_64bit2 {
5574: my ($symb,$courseid,$domain,$username)=@_;
5575: {
5576: use integer;
5577: # strings need to be an even # of cahracters long, it it is odd the
5578: # last characters gets thrown away
5579: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5580: my $symbseed=numval($symb) << 10;
5581: my $namechck=unpack("%32S*",$username.' ');
5582:
5583: my $nameseed=numval($username) << 21;
5584: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5585: my $courseseed=unpack("%32S*",$courseid.' ');
5586:
5587: my $num1=$symbchck+$symbseed+$namechck;
5588: my $num2=$nameseed+$domainseed+$courseseed;
5589: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5590: #&Apache::lonxml::debug("rndseed :$num:$symb");
5591: return "$num1,$num2";
5592: }
5593: }
5594:
5595: sub rndseed_64bit3 {
5596: my ($symb,$courseid,$domain,$username)=@_;
5597: {
5598: use integer;
5599: # strings need to be an even # of cahracters long, it it is odd the
5600: # last characters gets thrown away
5601: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5602: my $symbseed=numval2($symb) << 10;
5603: my $namechck=unpack("%32S*",$username.' ');
5604:
5605: my $nameseed=numval2($username) << 21;
5606: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5607: my $courseseed=unpack("%32S*",$courseid.' ');
5608:
5609: my $num1=$symbchck+$symbseed+$namechck;
5610: my $num2=$nameseed+$domainseed+$courseseed;
5611: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5612: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5613: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5614:
5615: return "$num1:$num2";
5616: }
5617: }
5618:
5619: sub rndseed_64bit4 {
5620: my ($symb,$courseid,$domain,$username)=@_;
5621: {
5622: use integer;
5623: # strings need to be an even # of cahracters long, it it is odd the
5624: # last characters gets thrown away
5625: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5626: my $symbseed=numval3($symb) << 10;
5627: my $namechck=unpack("%32S*",$username.' ');
5628:
5629: my $nameseed=numval3($username) << 21;
5630: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5631: my $courseseed=unpack("%32S*",$courseid.' ');
5632:
5633: my $num1=$symbchck+$symbseed+$namechck;
5634: my $num2=$nameseed+$domainseed+$courseseed;
5635: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5636: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5637: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5638:
5639: return "$num1:$num2";
5640: }
5641: }
5642:
5643: sub rndseed_64bit5 {
5644: my ($symb,$courseid,$domain,$username)=@_;
5645: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
5646: return "$num1:$num2";
5647: }
5648:
5649: sub rndseed_CODE_64bit {
5650: my ($symb,$courseid,$domain,$username)=@_;
5651: {
5652: use integer;
5653: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5654: my $symbseed=numval2($symb);
5655: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5656: my $CODEseed=numval(&getCODE());
5657: my $courseseed=unpack("%32S*",$courseid.' ');
5658: my $num1=$symbseed+$CODEchck;
5659: my $num2=$CODEseed+$courseseed+$symbchck;
5660: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5661: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5662: if ($_64bit) { $num1=(($num1<<32)>>32); }
5663: if ($_64bit) { $num2=(($num2<<32)>>32); }
5664: return "$num1:$num2";
5665: }
5666: }
5667:
5668: sub rndseed_CODE_64bit4 {
5669: my ($symb,$courseid,$domain,$username)=@_;
5670: {
5671: use integer;
5672: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5673: my $symbseed=numval3($symb);
5674: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5675: my $CODEseed=numval3(&getCODE());
5676: my $courseseed=unpack("%32S*",$courseid.' ');
5677: my $num1=$symbseed+$CODEchck;
5678: my $num2=$CODEseed+$courseseed+$symbchck;
5679: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5680: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5681: if ($_64bit) { $num1=(($num1<<32)>>32); }
5682: if ($_64bit) { $num2=(($num2<<32)>>32); }
5683: return "$num1:$num2";
5684: }
5685: }
5686:
5687: sub rndseed_CODE_64bit5 {
5688: my ($symb,$courseid,$domain,$username)=@_;
5689: my $code = &getCODE();
5690: my ($num1,$num2)=&digest("$symb,$courseid,$code");
5691: return "$num1:$num2";
5692: }
5693:
5694: sub setup_random_from_rndseed {
5695: my ($rndseed)=@_;
5696: if ($rndseed =~/([,:])/) {
5697: my ($num1,$num2)=split(/[,:]/,$rndseed);
5698: &Math::Random::random_set_seed(abs($num1),abs($num2));
5699: } else {
5700: &Math::Random::random_set_seed_from_phrase($rndseed);
5701: }
5702: }
5703:
5704: sub latest_receipt_algorithm_id {
5705: return 'receipt2';
5706: }
5707:
5708: sub recunique {
5709: my $fucourseid=shift;
5710: my $unique;
5711: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5712: $unique=$env{"course.$fucourseid.internal.encseed"};
5713: } else {
5714: $unique=$perlvar{'lonReceipt'};
5715: }
5716: return unpack("%32C*",$unique);
5717: }
5718:
5719: sub recprefix {
5720: my $fucourseid=shift;
5721: my $prefix;
5722: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5723: $prefix=$env{"course.$fucourseid.internal.encpref"};
5724: } else {
5725: $prefix=$perlvar{'lonHostID'};
5726: }
5727: return unpack("%32C*",$prefix);
5728: }
5729:
5730: sub ireceipt {
5731: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
5732: my $cuname=unpack("%32C*",$funame);
5733: my $cudom=unpack("%32C*",$fudom);
5734: my $cucourseid=unpack("%32C*",$fucourseid);
5735: my $cusymb=unpack("%32C*",$fusymb);
5736: my $cunique=&recunique($fucourseid);
5737: my $cpart=unpack("%32S*",$part);
5738: my $return =&recprefix($fucourseid).'-';
5739: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
5740: $env{'request.state'} eq 'construct') {
5741: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
5742: " and ".($cpart%$cudom));
5743:
5744: $return.= ($cunique%$cuname+
5745: $cunique%$cudom+
5746: $cusymb%$cuname+
5747: $cusymb%$cudom+
5748: $cucourseid%$cuname+
5749: $cucourseid%$cudom+
5750: $cpart%$cuname+
5751: $cpart%$cudom);
5752: } else {
5753: $return.= ($cunique%$cuname+
5754: $cunique%$cudom+
5755: $cusymb%$cuname+
5756: $cusymb%$cudom+
5757: $cucourseid%$cuname+
5758: $cucourseid%$cudom);
5759: }
5760: return $return;
5761: }
5762:
5763: sub receipt {
5764: my ($part)=@_;
5765: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
5766: return &ireceipt($name,$domain,$courseid,$symb,$part);
5767: }
5768:
5769: # ------------------------------------------------------------ Serves up a file
5770: # returns either the contents of the file or
5771: # -1 if the file doesn't exist
5772: #
5773: # if the target is a file that was uploaded via DOCS,
5774: # a check will be made to see if a current copy exists on the local server,
5775: # if it does this will be served, otherwise a copy will be retrieved from
5776: # the home server for the course and stored in /home/httpd/html/userfiles on
5777: # the local server.
5778:
5779: sub getfile {
5780: my ($file) = @_;
5781: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
5782: &repcopy($file);
5783: return &readfile($file);
5784: }
5785:
5786: sub repcopy_userfile {
5787: my ($file)=@_;
5788: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
5789: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
5790: my ($cdom,$cnum,$filename) =
5791: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
5792: my ($info,$rtncode);
5793: my $uri="/uploaded/$cdom/$cnum/$filename";
5794: if (-e "$file") {
5795: my @fileinfo = stat($file);
5796: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
5797: if ($lwpresp ne 'ok') {
5798: if ($rtncode eq '404') {
5799: unlink($file);
5800: }
5801: #my $ua=new LWP::UserAgent;
5802: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5803: #my $response=$ua->request($request);
5804: #if ($response->is_success()) {
5805: # return $response->content;
5806: # } else {
5807: # return -1;
5808: # }
5809: return -1;
5810: }
5811: if ($info < $fileinfo[9]) {
5812: return 'ok';
5813: }
5814: $info = '';
5815: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5816: if ($lwpresp ne 'ok') {
5817: return -1;
5818: }
5819: } else {
5820: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5821: if ($lwpresp ne 'ok') {
5822: my $ua=new LWP::UserAgent;
5823: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5824: my $response=$ua->request($request);
5825: if ($response->is_success()) {
5826: $info=$response->content;
5827: } else {
5828: return -1;
5829: }
5830: }
5831: my @parts = ($cdom,$cnum);
5832: if ($filename =~ m|^(.+)/[^/]+$|) {
5833: push @parts, split(/\//,$1);
5834: }
5835: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
5836: foreach my $part (@parts) {
5837: $path .= '/'.$part;
5838: if (!-e $path) {
5839: mkdir($path,0770);
5840: }
5841: }
5842: }
5843: open(FILE,">$file");
5844: print FILE $info;
5845: close(FILE);
5846: return 'ok';
5847: }
5848:
5849: sub tokenwrapper {
5850: my $uri=shift;
5851: $uri=~s|^http\://([^/]+)||;
5852: $uri=~s|^/||;
5853: $env{'user.environment'}=~/\/([^\/]+)\.id/;
5854: my $token=$1;
5855: my (undef,$udom,$uname,$file)=split('/',$uri,4);
5856: if ($udom && $uname && $file) {
5857: $file=~s|(\?\.*)*$||;
5858: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
5859: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
5860: (($uri=~/\?/)?'&':'?').'token='.$token.
5861: '&tokenissued='.$perlvar{'lonHostID'};
5862: } else {
5863: return '/adm/notfound.html';
5864: }
5865: }
5866:
5867: sub getuploaded {
5868: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
5869: $uri=~s/^\///;
5870: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
5871: my $ua=new LWP::UserAgent;
5872: my $request=new HTTP::Request($reqtype,$uri);
5873: my $response=$ua->request($request);
5874: $$rtncode = $response->code;
5875: if (! $response->is_success()) {
5876: return 'failed';
5877: }
5878: if ($reqtype eq 'HEAD') {
5879: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
5880: } elsif ($reqtype eq 'GET') {
5881: $$info = $response->content;
5882: }
5883: return 'ok';
5884: }
5885:
5886: sub readfile {
5887: my $file = shift;
5888: if ( (! -e $file ) || ($file eq '') ) { return -1; };
5889: my $fh;
5890: open($fh,"<$file");
5891: my $a='';
5892: while (<$fh>) { $a .=$_; }
5893: return $a;
5894: }
5895:
5896: sub filelocation {
5897: my ($dir,$file) = @_;
5898: my $location;
5899: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
5900: if ($file=~m:^/~:) { # is a contruction space reference
5901: $location = $file;
5902: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
5903: } elsif ($file=~m:^/home/[^/]*/public_html/:) {
5904: # is a correct contruction space reference
5905: $location = $file;
5906: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
5907: my ($udom,$uname,$filename)=
5908: ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
5909: my $home=&homeserver($uname,$udom);
5910: my $is_me=0;
5911: my @ids=¤t_machine_ids();
5912: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
5913: if ($is_me) {
5914: $location=&Apache::loncommon::propath($udom,$uname).
5915: '/userfiles/'.$filename;
5916: } else {
5917: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
5918: $udom.'/'.$uname.'/'.$filename;
5919: }
5920: } else {
5921: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5922: $file=~s:^/res/:/:;
5923: if ( !( $file =~ m:^/:) ) {
5924: $location = $dir. '/'.$file;
5925: } else {
5926: $location = '/home/httpd/html/res'.$file;
5927: }
5928: }
5929: $location=~s://+:/:g; # remove duplicate /
5930: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
5931: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
5932: return $location;
5933: }
5934:
5935: sub hreflocation {
5936: my ($dir,$file)=@_;
5937: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
5938: $file=filelocation($dir,$file);
5939: }
5940: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
5941: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
5942: } elsif ($file=~m-/home/(\w+)/public_html/-) {
5943: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
5944: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
5945: $file=~s-^/home/httpd/lonUsers/([^/]*)/./././([^/]*)/userfiles/
5946: -/uploaded/$1/$2/-x;
5947: }
5948: return $file;
5949: }
5950:
5951: sub current_machine_domains {
5952: my $hostname=$hostname{$perlvar{'lonHostID'}};
5953: my @domains;
5954: while( my($id, $name) = each(%hostname)) {
5955: # &logthis("-$id-$name-$hostname-");
5956: if ($hostname eq $name) {
5957: push(@domains,$hostdom{$id});
5958: }
5959: }
5960: return @domains;
5961: }
5962:
5963: sub current_machine_ids {
5964: my $hostname=$hostname{$perlvar{'lonHostID'}};
5965: my @ids;
5966: while( my($id, $name) = each(%hostname)) {
5967: # &logthis("-$id-$name-$hostname-");
5968: if ($hostname eq $name) {
5969: push(@ids,$id);
5970: }
5971: }
5972: return @ids;
5973: }
5974:
5975: # ------------------------------------------------------------- Declutters URLs
5976:
5977: sub declutter {
5978: my $thisfn=shift;
5979: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
5980: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5981: $thisfn=~s/^\///;
5982: $thisfn=~s/^res\///;
5983: $thisfn=~s/\?.+$//;
5984: return $thisfn;
5985: }
5986:
5987: # ------------------------------------------------------------- Clutter up URLs
5988:
5989: sub clutter {
5990: my $thisfn='/'.&declutter(shift);
5991: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
5992: $thisfn='/res'.$thisfn;
5993: }
5994: return $thisfn;
5995: }
5996:
5997: sub freeze_escape {
5998: my ($value)=@_;
5999: if (ref($value)) {
6000: $value=&nfreeze($value);
6001: return '__FROZEN__'.&escape($value);
6002: }
6003: return &escape($value);
6004: }
6005:
6006: # -------------------------------------------------------- Escape Special Chars
6007:
6008: sub escape {
6009: my $str=shift;
6010: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
6011: return $str;
6012: }
6013:
6014: # ----------------------------------------------------- Un-Escape Special Chars
6015:
6016: sub unescape {
6017: my $str=shift;
6018: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
6019: return $str;
6020: }
6021:
6022: sub thaw_unescape {
6023: my ($value)=@_;
6024: if ($value =~ /^__FROZEN__/) {
6025: substr($value,0,10,undef);
6026: $value=&unescape($value);
6027: return &thaw($value);
6028: }
6029: return &unescape($value);
6030: }
6031:
6032: sub correct_line_ends {
6033: my ($result)=@_;
6034: $$result =~s/\r\n/\n/mg;
6035: $$result =~s/\r/\n/mg;
6036: }
6037: # ================================================================ Main Program
6038:
6039: sub goodbye {
6040: &logthis("Starting Shut down");
6041: #not converted to using infrastruture and probably shouldn't be
6042: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
6043: #converted
6044: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
6045: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
6046: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
6047: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
6048: #1.1 only
6049: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
6050: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
6051: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
6052: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
6053: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
6054: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
6055: &logthis(sprintf("%-20s is %s",'hits',$hits));
6056: &flushcourselogs();
6057: &logthis("Shutting down");
6058: return DONE;
6059: }
6060:
6061: BEGIN {
6062: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
6063: unless ($readit) {
6064: {
6065: # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
6066: open(my $config,"</etc/httpd/conf/loncapa.conf");
6067:
6068: while (my $configline=<$config>) {
6069: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
6070: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
6071: chomp($varvalue);
6072: $perlvar{$varname}=$varvalue;
6073: }
6074: }
6075: close($config);
6076: }
6077: {
6078: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
6079:
6080: while (my $configline=<$config>) {
6081: if ($configline =~ /^[^\#]*PerlSetVar/) {
6082: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
6083: chomp($varvalue);
6084: $perlvar{$varname}=$varvalue;
6085: }
6086: }
6087: close($config);
6088: }
6089:
6090: # ------------------------------------------------------------ Read domain file
6091: {
6092: %domaindescription = ();
6093: %domain_auth_def = ();
6094: %domain_auth_arg_def = ();
6095: my $fh;
6096: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
6097: while (<$fh>) {
6098: next if (/^(\#|\s*$)/);
6099: # next if /^\#/;
6100: chomp;
6101: my ($domain, $domain_description, $def_auth, $def_auth_arg,
6102: $def_lang, $city, $longi, $lati) = split(/:/,$_);
6103: $domain_auth_def{$domain}=$def_auth;
6104: $domain_auth_arg_def{$domain}=$def_auth_arg;
6105: $domaindescription{$domain}=$domain_description;
6106: $domain_lang_def{$domain}=$def_lang;
6107: $domain_city{$domain}=$city;
6108: $domain_longi{$domain}=$longi;
6109: $domain_lati{$domain}=$lati;
6110:
6111: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
6112: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
6113: }
6114: }
6115: close ($fh);
6116: }
6117:
6118:
6119: # ------------------------------------------------------------- Read hosts file
6120: {
6121: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
6122:
6123: while (my $configline=<$config>) {
6124: next if ($configline =~ /^(\#|\s*$)/);
6125: chomp($configline);
6126: my ($id,$domain,$role,$name)=split(/:/,$configline);
6127: $name=~s/\s//g;
6128: if ($id && $domain && $role && $name) {
6129: $hostname{$id}=$name;
6130: $hostdom{$id}=$domain;
6131: if ($role eq 'library') { $libserv{$id}=$name; }
6132: }
6133: }
6134: close($config);
6135: # FIXME: dev server don't want this, production servers _do_ want this
6136: #&get_iphost();
6137: }
6138:
6139: sub get_iphost {
6140: if (%iphost) { return %iphost; }
6141: my %name_to_ip;
6142: foreach my $id (keys(%hostname)) {
6143: my $name=$hostname{$id};
6144: my $ip;
6145: if (!exists($name_to_ip{$name})) {
6146: $ip = gethostbyname($name);
6147: if (!$ip || length($ip) ne 4) {
6148: &logthis("Skipping host $id name $name no IP found\n");
6149: next;
6150: }
6151: $ip=inet_ntoa($ip);
6152: $name_to_ip{$name} = $ip;
6153: } else {
6154: $ip = $name_to_ip{$name};
6155: }
6156: push(@{$iphost{$ip}},$id);
6157: }
6158: return %iphost;
6159: }
6160:
6161: # ------------------------------------------------------ Read spare server file
6162: {
6163: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
6164:
6165: while (my $configline=<$config>) {
6166: chomp($configline);
6167: if ($configline) {
6168: $spareid{$configline}=1;
6169: }
6170: }
6171: close($config);
6172: }
6173: # ------------------------------------------------------------ Read permissions
6174: {
6175: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
6176:
6177: while (my $configline=<$config>) {
6178: chomp($configline);
6179: if ($configline) {
6180: my ($role,$perm)=split(/ /,$configline);
6181: if ($perm ne '') { $pr{$role}=$perm; }
6182: }
6183: }
6184: close($config);
6185: }
6186:
6187: # -------------------------------------------- Read plain texts for permissions
6188: {
6189: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
6190:
6191: while (my $configline=<$config>) {
6192: chomp($configline);
6193: if ($configline) {
6194: my ($short,$plain)=split(/:/,$configline);
6195: if ($plain ne '') { $prp{$short}=$plain; }
6196: }
6197: }
6198: close($config);
6199: }
6200:
6201: # ---------------------------------------------------------- Read package table
6202: {
6203: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
6204:
6205: while (my $configline=<$config>) {
6206: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
6207: chomp($configline);
6208: my ($short,$plain)=split(/:/,$configline);
6209: my ($pack,$name)=split(/\&/,$short);
6210: if ($plain ne '') {
6211: $packagetab{$pack.'&'.$name.'&name'}=$name;
6212: $packagetab{$short}=$plain;
6213: }
6214: }
6215: close($config);
6216: }
6217:
6218: # ------------- set up temporary directory
6219: {
6220: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
6221:
6222: }
6223:
6224: $memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
6225:
6226: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
6227: $dumpcount=0;
6228:
6229: &logtouch();
6230: &logthis('<font color="yellow">INFO: Read configuration</font>');
6231: $readit=1;
6232: {
6233: use integer;
6234: my $test=(2**32)+1;
6235: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
6236: &logthis(" Detected 64bit platform ($_64bit)");
6237: }
6238: }
6239: }
6240:
6241: 1;
6242: __END__
6243:
6244: =pod
6245:
6246: =head1 NAME
6247:
6248: Apache::lonnet - Subroutines to ask questions about things in the network.
6249:
6250: =head1 SYNOPSIS
6251:
6252: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
6253:
6254: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
6255:
6256: Common parameters:
6257:
6258: =over 4
6259:
6260: =item *
6261:
6262: $uname : an internal username (if $cname expecting a course Id specifically)
6263:
6264: =item *
6265:
6266: $udom : a domain (if $cdom expecting a course's domain specifically)
6267:
6268: =item *
6269:
6270: $symb : a resource instance identifier
6271:
6272: =item *
6273:
6274: $namespace : the name of a .db file that contains the data needed or
6275: being set.
6276:
6277: =back
6278:
6279: =head1 OVERVIEW
6280:
6281: lonnet provides subroutines which interact with the
6282: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
6283: about classes, users, and resources.
6284:
6285: For many of these objects you can also use this to store data about
6286: them or modify them in various ways.
6287:
6288: =head2 Symbs
6289:
6290: To identify a specific instance of a resource, LON-CAPA uses symbols
6291: or "symbs"X<symb>. These identifiers are built from the URL of the
6292: map, the resource number of the resource in the map, and the URL of
6293: the resource itself. The latter is somewhat redundant, but might help
6294: if maps change.
6295:
6296: An example is
6297:
6298: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
6299:
6300: The respective map entry is
6301:
6302: <resource id="19" src="/res/msu/korte/tests/part12.problem"
6303: title="Problem 2">
6304: </resource>
6305:
6306: Symbs are used by the random number generator, as well as to store and
6307: restore data specific to a certain instance of for example a problem.
6308:
6309: =head2 Storing And Retrieving Data
6310:
6311: X<store()>X<cstore()>X<restore()>Three of the most important functions
6312: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
6313: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
6314: is is the non-critical message twin of cstore. These functions are for
6315: handlers to store a perl hash to a user's permanent data space in an
6316: easy manner, and to retrieve it again on another call. It is expected
6317: that a handler would use this once at the beginning to retrieve data,
6318: and then again once at the end to send only the new data back.
6319:
6320: The data is stored in the user's data directory on the user's
6321: homeserver under the ID of the course.
6322:
6323: The hash that is returned by restore will have all of the previous
6324: value for all of the elements of the hash.
6325:
6326: Example:
6327:
6328: #creating a hash
6329: my %hash;
6330: $hash{'foo'}='bar';
6331:
6332: #storing it
6333: &Apache::lonnet::cstore(\%hash);
6334:
6335: #changing a value
6336: $hash{'foo'}='notbar';
6337:
6338: #adding a new value
6339: $hash{'bar'}='foo';
6340: &Apache::lonnet::cstore(\%hash);
6341:
6342: #retrieving the hash
6343: my %history=&Apache::lonnet::restore();
6344:
6345: #print the hash
6346: foreach my $key (sort(keys(%history))) {
6347: print("\%history{$key} = $history{$key}");
6348: }
6349:
6350: Will print out:
6351:
6352: %history{1:foo} = bar
6353: %history{1:keys} = foo:timestamp
6354: %history{1:timestamp} = 990455579
6355: %history{2:bar} = foo
6356: %history{2:foo} = notbar
6357: %history{2:keys} = foo:bar:timestamp
6358: %history{2:timestamp} = 990455580
6359: %history{bar} = foo
6360: %history{foo} = notbar
6361: %history{timestamp} = 990455580
6362: %history{version} = 2
6363:
6364: Note that the special hash entries C<keys>, C<version> and
6365: C<timestamp> were added to the hash. C<version> will be equal to the
6366: total number of versions of the data that have been stored. The
6367: C<timestamp> attribute will be the UNIX time the hash was
6368: stored. C<keys> is available in every historical section to list which
6369: keys were added or changed at a specific historical revision of a
6370: hash.
6371:
6372: B<Warning>: do not store the hash that restore returns directly. This
6373: will cause a mess since it will restore the historical keys as if the
6374: were new keys. I.E. 1:foo will become 1:1:foo etc.
6375:
6376: Calling convention:
6377:
6378: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
6379: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
6380:
6381: For more detailed information, see lonnet specific documentation.
6382:
6383: =head1 RETURN MESSAGES
6384:
6385: =over 4
6386:
6387: =item * B<con_lost>: unable to contact remote host
6388:
6389: =item * B<con_delayed>: unable to contact remote host, message will be delivered
6390: when the connection is brought back up
6391:
6392: =item * B<con_failed>: unable to contact remote host and unable to save message
6393: for later delivery
6394:
6395: =item * B<error:>: an error a occured, a description of the error follows the :
6396:
6397: =item * B<no_such_host>: unable to fund a host associated with the user/domain
6398: that was requested
6399:
6400: =back
6401:
6402: =head1 PUBLIC SUBROUTINES
6403:
6404: =head2 Session Environment Functions
6405:
6406: =over 4
6407:
6408: =item *
6409: X<appenv()>
6410: B<appenv(%hash)>: the value of %hash is written to
6411: the user envirnoment file, and will be restored for each access this
6412: user makes during this session, also modifies the %env for the current
6413: process
6414:
6415: =item *
6416: X<delenv()>
6417: B<delenv($regexp)>: removes all items from the session
6418: environment file that matches the regular expression in $regexp. The
6419: values are also delted from the current processes %env.
6420:
6421: =back
6422:
6423: =head2 User Information
6424:
6425: =over 4
6426:
6427: =item *
6428: X<queryauthenticate()>
6429: B<queryauthenticate($uname,$udom)>: try to determine user's current
6430: authentication scheme
6431:
6432: =item *
6433: X<authenticate()>
6434: B<authenticate($uname,$upass,$udom)>: try to
6435: authenticate user from domain's lib servers (first use the current
6436: one). C<$upass> should be the users password.
6437:
6438: =item *
6439: X<homeserver()>
6440: B<homeserver($uname,$udom)>: find the server which has
6441: the user's directory and files (there must be only one), this caches
6442: the answer, and also caches if there is a borken connection.
6443:
6444: =item *
6445: X<idget()>
6446: B<idget($udom,@ids)>: find the usernames behind a list of IDs
6447: (IDs are a unique resource in a domain, there must be only 1 ID per
6448: username, and only 1 username per ID in a specific domain) (returns
6449: hash: id=>name,id=>name)
6450:
6451: =item *
6452: X<idrget()>
6453: B<idrget($udom,@unames)>: find the IDs behind a list of
6454: usernames (returns hash: name=>id,name=>id)
6455:
6456: =item *
6457: X<idput()>
6458: B<idput($udom,%ids)>: store away a list of names and associated IDs
6459:
6460: =item *
6461: X<rolesinit()>
6462: B<rolesinit($udom,$username,$authhost)>: get user privileges
6463:
6464: =item *
6465: X<getsection()>
6466: B<getsection($udom,$uname,$cname)>: finds the section of student in the
6467: course $cname, return section name/number or '' for "not in course"
6468: and '-1' for "no section"
6469:
6470: =item *
6471: X<userenvironment()>
6472: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
6473: passed in @what from the requested user's environment, returns a hash
6474:
6475: =back
6476:
6477: =head2 User Roles
6478:
6479: =over 4
6480:
6481: =item *
6482:
6483: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
6484: actions
6485: F: full access
6486: U,I,K: authentication modes (cxx only)
6487: '': forbidden
6488: 1: user needs to choose course
6489: 2: browse allowed
6490:
6491: =item *
6492:
6493: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
6494: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
6495: and course level
6496:
6497: =item *
6498:
6499: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
6500: explanation of a user role term
6501:
6502: =back
6503:
6504: =head2 User Modification
6505:
6506: =over 4
6507:
6508: =item *
6509:
6510: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
6511: user for the level given by URL. Optional start and end dates (leave empty
6512: string or zero for "no date")
6513:
6514: =item *
6515:
6516: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
6517: change a users, password, possible return values are: ok,
6518: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
6519: refused
6520:
6521: =item *
6522:
6523: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
6524:
6525: =item *
6526:
6527: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
6528: modify user
6529:
6530: =item *
6531:
6532: modifystudent
6533:
6534: modify a students enrollment and identification information.
6535: The course id is resolved based on the current users environment.
6536: This means the envoking user must be a course coordinator or otherwise
6537: associated with a course.
6538:
6539: This call is essentially a wrapper for lonnet::modifyuser and
6540: lonnet::modify_student_enrollment
6541:
6542: Inputs:
6543:
6544: =over 4
6545:
6546: =item B<$udom> Students loncapa domain
6547:
6548: =item B<$uname> Students loncapa login name
6549:
6550: =item B<$uid> Students id/student number
6551:
6552: =item B<$umode> Students authentication mode
6553:
6554: =item B<$upass> Students password
6555:
6556: =item B<$first> Students first name
6557:
6558: =item B<$middle> Students middle name
6559:
6560: =item B<$last> Students last name
6561:
6562: =item B<$gene> Students generation
6563:
6564: =item B<$usec> Students section in course
6565:
6566: =item B<$end> Unix time of the roles expiration
6567:
6568: =item B<$start> Unix time of the roles start date
6569:
6570: =item B<$forceid> If defined, allow $uid to be changed
6571:
6572: =item B<$desiredhome> server to use as home server for student
6573:
6574: =back
6575:
6576: =item *
6577:
6578: modify_student_enrollment
6579:
6580: Change a students enrollment status in a class. The environment variable
6581: 'role.request.course' must be defined for this function to proceed.
6582:
6583: Inputs:
6584:
6585: =over 4
6586:
6587: =item $udom, students domain
6588:
6589: =item $uname, students name
6590:
6591: =item $uid, students user id
6592:
6593: =item $first, students first name
6594:
6595: =item $middle
6596:
6597: =item $last
6598:
6599: =item $gene
6600:
6601: =item $usec
6602:
6603: =item $end
6604:
6605: =item $start
6606:
6607: =back
6608:
6609:
6610: =item *
6611:
6612: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
6613: custom role; give a custom role to a user for the level given by URL. Specify
6614: name and domain of role author, and role name
6615:
6616: =item *
6617:
6618: revokerole($udom,$uname,$url,$role) : revoke a role for url
6619:
6620: =item *
6621:
6622: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
6623:
6624: =back
6625:
6626: =head2 Course Infomation
6627:
6628: =over 4
6629:
6630: =item *
6631:
6632: coursedescription($courseid) : returns a hash of information about the
6633: specified course id, including all environment settings for the
6634: course, the description of the course will be in the hash under the
6635: key 'description'
6636:
6637: =item *
6638:
6639: resdata($name,$domain,$type,@which) : request for current parameter
6640: setting for a specific $type, where $type is either 'course' or 'user',
6641: @what should be a list of parameters to ask about. This routine caches
6642: answers for 5 minutes.
6643:
6644: =back
6645:
6646: =head2 Course Modification
6647:
6648: =over 4
6649:
6650: =item *
6651:
6652: writecoursepref($courseid,%prefs) : write preferences (environment
6653: database) for a course
6654:
6655: =item *
6656:
6657: createcourse($udom,$description,$url) : make/modify course
6658:
6659: =back
6660:
6661: =head2 Resource Subroutines
6662:
6663: =over 4
6664:
6665: =item *
6666:
6667: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
6668:
6669: =item *
6670:
6671: repcopy($filename) : subscribes to the requested file, and attempts to
6672: replicate from the owning library server, Might return
6673: 'unavailable', 'not_found', 'forbidden', 'ok', or
6674: 'bad_request', also attempts to grab the metadata for the
6675: resource. Expects the local filesystem pathname
6676: (/home/httpd/html/res/....)
6677:
6678: =back
6679:
6680: =head2 Resource Information
6681:
6682: =over 4
6683:
6684: =item *
6685:
6686: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
6687: a vairety of different possible values, $varname should be a request
6688: string, and the other parameters can be used to specify who and what
6689: one is asking about.
6690:
6691: Possible values for $varname are environment.lastname (or other item
6692: from the envirnment hash), user.name (or someother aspect about the
6693: user), resource.0.maxtries (or some other part and parameter of a
6694: resource)
6695:
6696: =item *
6697:
6698: directcondval($number) : get current value of a condition; reads from a state
6699: string
6700:
6701: =item *
6702:
6703: condval($condidx) : value of condition index based on state
6704:
6705: =item *
6706:
6707: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
6708: resource's metadata, $what should be either a specific key, or either
6709: 'keys' (to get a list of possible keys) or 'packages' to get a list of
6710: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
6711:
6712: this function automatically caches all requests
6713:
6714: =item *
6715:
6716: metadata_query($query,$custom,$customshow) : make a metadata query against the
6717: network of library servers; returns file handle of where SQL and regex results
6718: will be stored for query
6719:
6720: =item *
6721:
6722: symbread($filename) : return symbolic list entry (filename argument optional);
6723: returns the data handle
6724:
6725: =item *
6726:
6727: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
6728: a possible symb for the URL in $thisfn, and if is an encryypted
6729: resource that the user accessed using /enc/ returns a 1 on success, 0
6730: on failure, user must be in a course, as it assumes the existance of
6731: the course initial hash, and uses $env('request.course.id'}
6732:
6733:
6734: =item *
6735:
6736: symbclean($symb) : removes versions numbers from a symb, returns the
6737: cleaned symb
6738:
6739: =item *
6740:
6741: is_on_map($uri) : checks if the $uri is somewhere on the current
6742: course map, user must be in a course for it to work.
6743:
6744: =item *
6745:
6746: numval($salt) : return random seed value (addend for rndseed)
6747:
6748: =item *
6749:
6750: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
6751: a random seed, all arguments are optional, if they aren't sent it uses the
6752: environment to derive them. Note: if symb isn't sent and it can't get one
6753: from &symbread it will use the current time as its return value
6754:
6755: =item *
6756:
6757: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
6758: unfakeable, receipt
6759:
6760: =item *
6761:
6762: receipt() : API to ireceipt working off of env values; given out to users
6763:
6764: =item *
6765:
6766: countacc($url) : count the number of accesses to a given URL
6767:
6768: =item *
6769:
6770: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
6771:
6772: =item *
6773:
6774: checkin($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 $tcrsid)
6775:
6776: =item *
6777:
6778: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
6779:
6780: =item *
6781:
6782: devalidate($symb) : devalidate temporary spreadsheet calculations,
6783: forcing spreadsheet to reevaluate the resource scores next time.
6784:
6785: =back
6786:
6787: =head2 Storing/Retreiving Data
6788:
6789: =over 4
6790:
6791: =item *
6792:
6793: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
6794: for this url; hashref needs to be given and should be a \%hashname; the
6795: remaining args aren't required and if they aren't passed or are '' they will
6796: be derived from the env
6797:
6798: =item *
6799:
6800: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
6801: uses critical subroutine
6802:
6803: =item *
6804:
6805: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
6806: all args are optional
6807:
6808: =item *
6809:
6810: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
6811: works very similar to store/cstore, but all data is stored in a
6812: temporary location and can be reset using tmpreset, $storehash should
6813: be a hash reference, returns nothing on success
6814:
6815: =item *
6816:
6817: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
6818: similar to restore, but all data is stored in a temporary location and
6819: can be reset using tmpreset. Returns a hash of values on success,
6820: error string otherwise.
6821:
6822: =item *
6823:
6824: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
6825: deltes all keys for $symb form the temporary storage hash.
6826:
6827: =item *
6828:
6829: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6830: reference filled in from namesp ($udom and $uname are optional)
6831:
6832: =item *
6833:
6834: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
6835: namesp ($udom and $uname are optional)
6836:
6837: =item *
6838:
6839: dump($namespace,$udom,$uname,$regexp) :
6840: dumps the complete (or key matching regexp) namespace into a hash
6841: ($udom, $uname and $regexp are optional)
6842:
6843: =item *
6844:
6845: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
6846: $store can be a scalar, an array reference, or if the amount to be
6847: incremented is > 1, a hash reference.
6848:
6849: ($udom and $uname are optional)
6850:
6851: =item *
6852:
6853: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
6854: ($udom and $uname are optional)
6855:
6856: =item *
6857:
6858: putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
6859: keys used in storehash include version information (e.g., 1:$symb:message etc.) as
6860: used in records written by &store and retrieved by &restore. This function
6861: was created for use in editing discussion posts, without incrementing the
6862: version number included in the key for a particular post. The colon
6863: separated list of attribute names (e.g., the value associated with the key
6864: 1:keys:$symb) is also generated and passed in the ampersand separated
6865: items sent to lonnet::reply().
6866:
6867: =item *
6868:
6869: cput($namespace,$storehash,$udom,$uname) : critical put
6870: ($udom and $uname are optional)
6871:
6872: =item *
6873:
6874: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6875: reference filled in from namesp (encrypts the return communication)
6876: ($udom and $uname are optional)
6877:
6878: =item *
6879:
6880: log($udom,$name,$home,$message) : write to permanent log for user; use
6881: critical subroutine
6882:
6883: =back
6884:
6885: =head2 Network Status Functions
6886:
6887: =over 4
6888:
6889: =item *
6890:
6891: dirlist($uri) : return directory list based on URI
6892:
6893: =item *
6894:
6895: spareserver() : find server with least workload from spare.tab
6896:
6897: =back
6898:
6899: =head2 Apache Request
6900:
6901: =over 4
6902:
6903: =item *
6904:
6905: ssi($url,%hash) : server side include, does a complete request cycle on url to
6906: localhost, posts hash
6907:
6908: =back
6909:
6910: =head2 Data to String to Data
6911:
6912: =over 4
6913:
6914: =item *
6915:
6916: hash2str(%hash) : convert a hash into a string complete with escaping and '='
6917: and '&' separators, supports elements that are arrayrefs and hashrefs
6918:
6919: =item *
6920:
6921: hashref2str($hashref) : convert a hashref into a string complete with
6922: escaping and '=' and '&' separators, supports elements that are
6923: arrayrefs and hashrefs
6924:
6925: =item *
6926:
6927: arrayref2str($arrayref) : convert an arrayref into a string complete
6928: with escaping and '&' separators, supports elements that are arrayrefs
6929: and hashrefs
6930:
6931: =item *
6932:
6933: str2hash($string) : convert string to hash using unescaping and
6934: splitting on '=' and '&', supports elements that are arrayrefs and
6935: hashrefs
6936:
6937: =item *
6938:
6939: str2array($string) : convert string to hash using unescaping and
6940: splitting on '&', supports elements that are arrayrefs and hashrefs
6941:
6942: =back
6943:
6944: =head2 Logging Routines
6945:
6946: =over 4
6947:
6948: These routines allow one to make log messages in the lonnet.log and
6949: lonnet.perm logfiles.
6950:
6951: =item *
6952:
6953: logtouch() : make sure the logfile, lonnet.log, exists
6954:
6955: =item *
6956:
6957: logthis() : append message to the normal lonnet.log file, it gets
6958: preiodically rolled over and deleted.
6959:
6960: =item *
6961:
6962: logperm() : append a permanent message to lonnet.perm.log, this log
6963: file never gets deleted by any automated portion of the system, only
6964: messages of critical importance should go in here.
6965:
6966: =back
6967:
6968: =head2 General File Helper Routines
6969:
6970: =over 4
6971:
6972: =item *
6973:
6974: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
6975: (a) files in /uploaded
6976: (i) If a local copy of the file exists -
6977: compares modification date of local copy with last-modified date for
6978: definitive version stored on home server for course. If local copy is
6979: stale, requests a new version from the home server and stores it.
6980: If the original has been removed from the home server, then local copy
6981: is unlinked.
6982: (ii) If local copy does not exist -
6983: requests the file from the home server and stores it.
6984:
6985: If $caller is 'uploadrep':
6986: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
6987: for request for files originally uploaded via DOCS.
6988: - returns 'ok' if fresh local copy now available, -1 otherwise.
6989:
6990: Otherwise:
6991: This indicates a call from the content generation phase of the request.
6992: - returns the entire contents of the file or -1.
6993:
6994: (b) files in /res
6995: - returns the entire contents of a file or -1;
6996: it properly subscribes to and replicates the file if neccessary.
6997:
6998: =item *
6999:
7000: filelocation($dir,$file) : returns file system location of a file
7001: based on URI; meant to be "fairly clean" absolute reference, $dir is a
7002: directory that relative $file lookups are to looked in ($dir of /a/dir
7003: and a file of ../bob will become /a/bob)
7004:
7005: =item *
7006:
7007: hreflocation($dir,$file) : returns file system location or a URL; same as
7008: filelocation except for hrefs
7009:
7010: =item *
7011:
7012: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
7013:
7014: =back
7015:
7016: =head2 Usererfile file routines (/uploaded*)
7017:
7018: =over 4
7019:
7020: =item *
7021:
7022: userfileupload(): main rotine for putting a file in a user or course's
7023: filespace, arguments are,
7024:
7025: formname - required - this is the name of the element in $env where the
7026: filename, and the contents of the file to create/modifed exist
7027: the filename is in $env{'form.'.$formname.'.filename'} and the
7028: contents of the file is located in $env{'form.'.$formname}
7029: coursedoc - if true, store the file in the course of the active role
7030: of the current user
7031: subdir - required - subdirectory to put the file in under ../userfiles/
7032: if undefined, it will be placed in "unknown"
7033:
7034: (This routine calls clean_filename() to remove any dangerous
7035: characters from the filename, and then calls finuserfileupload() to
7036: complete the transaction)
7037:
7038: returns either the url of the uploaded file (/uploaded/....) if successful
7039: and /adm/notfound.html if unsuccessful
7040:
7041: =item *
7042:
7043: clean_filename(): routine for cleaing a filename up for storage in
7044: userfile space, argument is:
7045:
7046: filename - proposed filename
7047:
7048: returns: the new clean filename
7049:
7050: =item *
7051:
7052: finishuserfileupload(): routine that creaes and sends the file to
7053: userspace, probably shouldn't be called directly
7054:
7055: docuname: username or courseid of destination for the file
7056: docudom: domain of user/course of destination for the file
7057: formname: same as for userfileupload()
7058: fname: filename (inculding subdirectories) for the file
7059:
7060: returns either the url of the uploaded file (/uploaded/....) if successful
7061: and /adm/notfound.html if unsuccessful
7062:
7063: =item *
7064:
7065: renameuserfile(): renames an existing userfile to a new name
7066:
7067: Args:
7068: docuname: username or courseid of destination for the file
7069: docudom: domain of user/course of destination for the file
7070: old: current file name (including any subdirs under userfiles)
7071: new: desired file name (including any subdirs under userfiles)
7072:
7073: =item *
7074:
7075: mkdiruserfile(): creates a directory is a userfiles dir
7076:
7077: Args:
7078: docuname: username or courseid of destination for the file
7079: docudom: domain of user/course of destination for the file
7080: dir: dir to create (including any subdirs under userfiles)
7081:
7082: =item *
7083:
7084: removeuserfile(): removes a file that exists in userfiles
7085:
7086: Args:
7087: docuname: username or courseid of destination for the file
7088: docudom: domain of user/course of destination for the file
7089: fname: filname to delete (including any subdirs under userfiles)
7090:
7091: =item *
7092:
7093: removeuploadedurl(): convience function for removeuserfile()
7094:
7095: Args:
7096: url: a full /uploaded/... url to delete
7097:
7098: =back
7099:
7100: =head2 HTTP Helper Routines
7101:
7102: =over 4
7103:
7104: =item *
7105:
7106: escape() : unpack non-word characters into CGI-compatible hex codes
7107:
7108: =item *
7109:
7110: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
7111:
7112: =back
7113:
7114: =head1 PRIVATE SUBROUTINES
7115:
7116: =head2 Underlying communication routines (Shouldn't call)
7117:
7118: =over 4
7119:
7120: =item *
7121:
7122: subreply() : tries to pass a message to lonc, returns con_lost if incapable
7123:
7124: =item *
7125:
7126: reply() : uses subreply to send a message to remote machine, logs all failures
7127:
7128: =item *
7129:
7130: critical() : passes a critical message to another server; if cannot
7131: get through then place message in connection buffer directory and
7132: returns con_delayed, if incapable of saving message, returns
7133: con_failed
7134:
7135: =item *
7136:
7137: reconlonc() : tries to reconnect lonc client processes.
7138:
7139: =back
7140:
7141: =head2 Resource Access Logging
7142:
7143: =over 4
7144:
7145: =item *
7146:
7147: flushcourselogs() : flush (save) buffer logs and access logs
7148:
7149: =item *
7150:
7151: courselog($what) : save message for course in hash
7152:
7153: =item *
7154:
7155: courseacclog($what) : save message for course using &courselog(). Perform
7156: special processing for specific resource types (problems, exams, quizzes, etc).
7157:
7158: =item *
7159:
7160: goodbye() : flush course logs and log shutting down; it is called in srm.conf
7161: as a PerlChildExitHandler
7162:
7163: =back
7164:
7165: =head2 Other
7166:
7167: =over 4
7168:
7169: =item *
7170:
7171: symblist($mapname,%newhash) : update symbolic storage links
7172:
7173: =back
7174:
7175: =cut
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