1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.795 2006/10/17 15:15:51 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonnet;
31:
32: use strict;
33: use LWP::UserAgent();
34: use HTTP::Headers;
35: use HTTP::Date;
36: # use Date::Parse;
37: use vars
38: qw(%perlvar %hostname %badServerCache %iphost %spareid %hostdom
39: %libserv %pr %prp $memcache %packagetab
40: %courselogs %accesshash %userrolehash %domainrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf %coursetypebuf
42: %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati %domain_primary
44: $tmpdir $_64bit %env);
45:
46: use IO::Socket;
47: use GDBM_File;
48: use HTML::LCParser;
49: use HTML::Parser;
50: use Fcntl qw(:flock);
51: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
52: use Time::HiRes qw( gettimeofday tv_interval );
53: use Cache::Memcached;
54: use Digest::MD5;
55: use Math::Random;
56: use lib '/home/httpd/lib/perl';
57: use LONCAPA;
58: use LONCAPA::Configuration;
59:
60: my $readit;
61: my $max_connection_retries = 10; # Or some such value.
62:
63: require Exporter;
64:
65: our @ISA = qw (Exporter);
66: our @EXPORT = qw(%env);
67:
68: =pod
69:
70: =head1 Package Variables
71:
72: These are largely undocumented, so if you decipher one please note it here.
73:
74: =over 4
75:
76: =item $processmarker
77:
78: Contains the time this process was started and this servers host id.
79:
80: =item $dumpcount
81:
82: Counts the number of times a message log flush has been attempted (regardless
83: of success) by this process. Used as part of the filename when messages are
84: delayed.
85:
86: =back
87:
88: =cut
89:
90:
91: # --------------------------------------------------------------------- Logging
92: {
93: my $logid;
94: sub instructor_log {
95: my ($hash_name,$storehash,$delflag,$uname,$udom)=@_;
96: $logid++;
97: my $id=time().'00000'.$$.'00000'.$logid;
98: return &Apache::lonnet::put('nohist_'.$hash_name,
99: { $id => {
100: 'exe_uname' => $env{'user.name'},
101: 'exe_udom' => $env{'user.domain'},
102: 'exe_time' => time(),
103: 'exe_ip' => $ENV{'REMOTE_ADDR'},
104: 'delflag' => $delflag,
105: 'logentry' => $storehash,
106: 'uname' => $uname,
107: 'udom' => $udom,
108: }
109: },
110: $env{'course.'.$env{'request.course.id'}.'.domain'},
111: $env{'course.'.$env{'request.course.id'}.'.num'}
112: );
113: }
114: }
115:
116: sub logtouch {
117: my $execdir=$perlvar{'lonDaemons'};
118: unless (-e "$execdir/logs/lonnet.log") {
119: open(my $fh,">>$execdir/logs/lonnet.log");
120: close $fh;
121: }
122: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
123: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
124: }
125:
126: sub logthis {
127: my $message=shift;
128: my $execdir=$perlvar{'lonDaemons'};
129: my $now=time;
130: my $local=localtime($now);
131: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
132: print $fh "$local ($$): $message\n";
133: close($fh);
134: }
135: return 1;
136: }
137:
138: sub logperm {
139: my $message=shift;
140: my $execdir=$perlvar{'lonDaemons'};
141: my $now=time;
142: my $local=localtime($now);
143: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
144: print $fh "$now:$message:$local\n";
145: close($fh);
146: }
147: return 1;
148: }
149:
150: # -------------------------------------------------- Non-critical communication
151: sub subreply {
152: my ($cmd,$server)=@_;
153: my $peerfile="$perlvar{'lonSockDir'}/".$hostname{$server};
154: #
155: # With loncnew process trimming, there's a timing hole between lonc server
156: # process exit and the master server picking up the listen on the AF_UNIX
157: # socket. In that time interval, a lock file will exist:
158:
159: my $lockfile=$peerfile.".lock";
160: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
161: sleep(1);
162: }
163: # At this point, either a loncnew parent is listening or an old lonc
164: # or loncnew child is listening so we can connect or everything's dead.
165: #
166: # We'll give the connection a few tries before abandoning it. If
167: # connection is not possible, we'll con_lost back to the client.
168: #
169: my $client;
170: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
171: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
172: Type => SOCK_STREAM,
173: Timeout => 10);
174: if($client) {
175: last; # Connected!
176: }
177: sleep(1); # Try again later if failed connection.
178: }
179: my $answer;
180: if ($client) {
181: print $client "sethost:$server:$cmd\n";
182: $answer=<$client>;
183: if (!$answer) { $answer="con_lost"; }
184: chomp($answer);
185: } else {
186: $answer = 'con_lost'; # Failed connection.
187: }
188: return $answer;
189: }
190:
191: sub reply {
192: my ($cmd,$server)=@_;
193: unless (defined($hostname{$server})) { return 'no_such_host'; }
194: my $answer=subreply($cmd,$server);
195: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
196: &logthis("<font color=\"blue\">WARNING:".
197: " $cmd to $server returned $answer</font>");
198: }
199: return $answer;
200: }
201:
202: # ----------------------------------------------------------- Send USR1 to lonc
203:
204: sub reconlonc {
205: my $peerfile=shift;
206: &logthis("Trying to reconnect for $peerfile");
207: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
208: if (open(my $fh,"<$loncfile")) {
209: my $loncpid=<$fh>;
210: chomp($loncpid);
211: if (kill 0 => $loncpid) {
212: &logthis("lonc at pid $loncpid responding, sending USR1");
213: kill USR1 => $loncpid;
214: sleep 1;
215: if (-e "$peerfile") { return; }
216: &logthis("$peerfile still not there, give it another try");
217: sleep 5;
218: if (-e "$peerfile") { return; }
219: &logthis(
220: "<font color=\"blue\">WARNING: $peerfile still not there, giving up</font>");
221: } else {
222: &logthis(
223: "<font color=\"blue\">WARNING:".
224: " lonc at pid $loncpid not responding, giving up</font>");
225: }
226: } else {
227: &logthis('<font color="blue">WARNING: lonc not running, giving up</font>');
228: }
229: }
230:
231: # ------------------------------------------------------ Critical communication
232:
233: sub critical {
234: my ($cmd,$server)=@_;
235: unless ($hostname{$server}) {
236: &logthis("<font color=\"blue\">WARNING:".
237: " Critical message to unknown server ($server)</font>");
238: return 'no_such_host';
239: }
240: my $answer=reply($cmd,$server);
241: if ($answer eq 'con_lost') {
242: &reconlonc("$perlvar{'lonSockDir'}/$server");
243: my $answer=reply($cmd,$server);
244: if ($answer eq 'con_lost') {
245: my $now=time;
246: my $middlename=$cmd;
247: $middlename=substr($middlename,0,16);
248: $middlename=~s/\W//g;
249: my $dfilename=
250: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
251: $dumpcount++;
252: {
253: my $dfh;
254: if (open($dfh,">$dfilename")) {
255: print $dfh "$cmd\n";
256: close($dfh);
257: }
258: }
259: sleep 2;
260: my $wcmd='';
261: {
262: my $dfh;
263: if (open($dfh,"<$dfilename")) {
264: $wcmd=<$dfh>;
265: close($dfh);
266: }
267: }
268: chomp($wcmd);
269: if ($wcmd eq $cmd) {
270: &logthis("<font color=\"blue\">WARNING: ".
271: "Connection buffer $dfilename: $cmd</font>");
272: &logperm("D:$server:$cmd");
273: return 'con_delayed';
274: } else {
275: &logthis("<font color=\"red\">CRITICAL:"
276: ." Critical connection failed: $server $cmd</font>");
277: &logperm("F:$server:$cmd");
278: return 'con_failed';
279: }
280: }
281: }
282: return $answer;
283: }
284:
285: # ------------------------------------------- check if return value is an error
286:
287: sub error {
288: my ($result) = @_;
289: if ($result =~ /^(con_lost|no_such_host|error: (\d+) (.*))/) {
290: if ($2 == 2) { return undef; }
291: return $1;
292: }
293: return undef;
294: }
295:
296: sub convert_and_load_session_env {
297: my ($lonidsdir,$handle)=@_;
298: my @profile;
299: {
300: open(my $idf,"$lonidsdir/$handle.id");
301: flock($idf,LOCK_SH);
302: @profile=<$idf>;
303: close($idf);
304: }
305: my %temp_env;
306: foreach my $line (@profile) {
307: if ($line !~ m/=/) {
308: return 0;
309: }
310: chomp($line);
311: my ($envname,$envvalue)=split(/=/,$line,2);
312: $temp_env{&unescape($envname)} = &unescape($envvalue);
313: }
314: unlink("$lonidsdir/$handle.id");
315: if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",&GDBM_WRCREAT(),
316: 0640)) {
317: %disk_env = %temp_env;
318: @env{keys(%temp_env)} = @disk_env{keys(%temp_env)};
319: untie(%disk_env);
320: }
321: return 1;
322: }
323:
324: # ------------------------------------------- Transfer profile into environment
325: my $env_loaded;
326: sub transfer_profile_to_env {
327: my ($lonidsdir,$handle,$force_transfer) = @_;
328: if (!$force_transfer && $env_loaded) { return; }
329:
330: if (!defined($lonidsdir)) {
331: $lonidsdir = $perlvar{'lonIDsDir'};
332: }
333: if (!defined($handle)) {
334: ($handle) = ($env{'user.environment'} =~m|/([^/]+)\.id$| );
335: }
336:
337: my $convert;
338: {
339: open(my $idf,"$lonidsdir/$handle.id");
340: flock($idf,LOCK_SH);
341: if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",
342: &GDBM_READER(),0640)) {
343: @env{keys(%disk_env)} = @disk_env{keys(%disk_env)};
344: untie(%disk_env);
345: } else {
346: $convert = 1;
347: }
348: }
349: if ($convert) {
350: if (!&convert_and_load_session_env($lonidsdir,$handle)) {
351: &logthis("Failed to load session, or convert session.");
352: }
353: }
354:
355: my %remove;
356: while ( my $envname = each(%env) ) {
357: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
358: if ($time < time-300) {
359: $remove{$key}++;
360: }
361: }
362: }
363:
364: $env{'user.environment'} = "$lonidsdir/$handle.id";
365: $env_loaded=1;
366: foreach my $expired_key (keys(%remove)) {
367: &delenv($expired_key);
368: }
369: }
370:
371: # ---------------------------------------------------------- Append Environment
372:
373: sub appenv {
374: my %newenv=@_;
375: foreach my $key (keys(%newenv)) {
376: if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
377: &logthis("<font color=\"blue\">WARNING: ".
378: "Attempt to modify environment ".$key." to ".$newenv{$key}
379: .'</font>');
380: delete($newenv{$key});
381: } else {
382: $env{$key}=$newenv{$key};
383: }
384: }
385: if (tie(my %disk_env,'GDBM_File',$env{'user.environment'},&GDBM_WRITER(),
386: 0640)) {
387: while (my ($key,$value) = each(%newenv)) {
388: $disk_env{$key} = $value;
389: }
390: untie(%disk_env);
391: }
392: return 'ok';
393: }
394: # ----------------------------------------------------- Delete from Environment
395:
396: sub delenv {
397: my $delthis=shift;
398: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
399: &logthis("<font color=\"blue\">WARNING: ".
400: "Attempt to delete from environment ".$delthis);
401: return 'error';
402: }
403: if (tie(my %disk_env,'GDBM_File',$env{'user.environment'},&GDBM_WRITER(),
404: 0640)) {
405: foreach my $key (keys(%disk_env)) {
406: if ($key=~/^$delthis/) {
407: delete($env{$key});
408: delete($disk_env{$key});
409: }
410: }
411: untie(%disk_env);
412: }
413: return 'ok';
414: }
415:
416: sub get_env_multiple {
417: my ($name) = @_;
418: my @values;
419: if (defined($env{$name})) {
420: # exists is it an array
421: if (ref($env{$name})) {
422: @values=@{ $env{$name} };
423: } else {
424: $values[0]=$env{$name};
425: }
426: }
427: return(@values);
428: }
429:
430: # ------------------------------------------ Find out current server userload
431: # there is a copy in lond
432: sub userload {
433: my $numusers=0;
434: {
435: opendir(LONIDS,$perlvar{'lonIDsDir'});
436: my $filename;
437: my $curtime=time;
438: while ($filename=readdir(LONIDS)) {
439: if ($filename eq '.' || $filename eq '..') {next;}
440: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
441: if ($curtime-$mtime < 1800) { $numusers++; }
442: }
443: closedir(LONIDS);
444: }
445: my $userloadpercent=0;
446: my $maxuserload=$perlvar{'lonUserLoadLim'};
447: if ($maxuserload) {
448: $userloadpercent=100*$numusers/$maxuserload;
449: }
450: $userloadpercent=sprintf("%.2f",$userloadpercent);
451: return $userloadpercent;
452: }
453:
454: # ------------------------------------------ Fight off request when overloaded
455:
456: sub overloaderror {
457: my ($r,$checkserver)=@_;
458: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
459: my $loadavg;
460: if ($checkserver eq $perlvar{'lonHostID'}) {
461: open(my $loadfile,'/proc/loadavg');
462: $loadavg=<$loadfile>;
463: $loadavg =~ s/\s.*//g;
464: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
465: close($loadfile);
466: } else {
467: $loadavg=&reply('load',$checkserver);
468: }
469: my $overload=$loadavg-100;
470: if ($overload>0) {
471: $r->err_headers_out->{'Retry-After'}=$overload;
472: $r->log_error('Overload of '.$overload.' on '.$checkserver);
473: return 413;
474: }
475: return '';
476: }
477:
478: # ------------------------------ Find server with least workload from spare.tab
479:
480: sub spareserver {
481: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
482: my $spare_server;
483: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
484: my $lowest_load=($loadpercent > $userloadpercent) ? $loadpercent
485: : $userloadpercent;
486:
487: foreach my $try_server (@{ $spareid{'primary'} }) {
488: ($spare_server, $lowest_load) =
489: &compare_server_load($try_server, $spare_server, $lowest_load);
490: }
491:
492: my $found_server = ($spare_server ne '' && $lowest_load < 100);
493:
494: if (!$found_server) {
495: foreach my $try_server (@{ $spareid{'default'} }) {
496: ($spare_server, $lowest_load) =
497: &compare_server_load($try_server, $spare_server, $lowest_load);
498: }
499: }
500:
501: if (!$want_server_name) {
502: $spare_server="http://$hostname{$spare_server}";
503: }
504: return $spare_server;
505: }
506:
507: sub compare_server_load {
508: my ($try_server, $spare_server, $lowest_load) = @_;
509:
510: my $loadans = &reply('load', $try_server);
511: my $userloadans = &reply('userload',$try_server);
512:
513: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
514: next; #didn't get a number from the server
515: }
516:
517: my $load;
518: if ($loadans =~ /\d/) {
519: if ($userloadans =~ /\d/) {
520: #both are numbers, pick the bigger one
521: $load = ($loadans > $userloadans) ? $loadans
522: : $userloadans;
523: } else {
524: $load = $loadans;
525: }
526: } else {
527: $load = $userloadans;
528: }
529:
530: if (($load =~ /\d/) && ($load < $lowest_load)) {
531: $spare_server = $try_server;
532: $lowest_load = $load;
533: }
534: return ($spare_server,$lowest_load);
535: }
536: # --------------------------------------------- Try to change a user's password
537:
538: sub changepass {
539: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
540: $currentpass = &escape($currentpass);
541: $newpass = &escape($newpass);
542: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
543: $server);
544: if (! $answer) {
545: &logthis("No reply on password change request to $server ".
546: "by $uname in domain $udom.");
547: } elsif ($answer =~ "^ok") {
548: &logthis("$uname in $udom successfully changed their password ".
549: "on $server.");
550: } elsif ($answer =~ "^pwchange_failure") {
551: &logthis("$uname in $udom was unable to change their password ".
552: "on $server. The action was blocked by either lcpasswd ".
553: "or pwchange");
554: } elsif ($answer =~ "^non_authorized") {
555: &logthis("$uname in $udom did not get their password correct when ".
556: "attempting to change it on $server.");
557: } elsif ($answer =~ "^auth_mode_error") {
558: &logthis("$uname in $udom attempted to change their password despite ".
559: "not being locally or internally authenticated on $server.");
560: } elsif ($answer =~ "^unknown_user") {
561: &logthis("$uname in $udom attempted to change their password ".
562: "on $server but were unable to because $server is not ".
563: "their home server.");
564: } elsif ($answer =~ "^refused") {
565: &logthis("$server refused to change $uname in $udom password because ".
566: "it was sent an unencrypted request to change the password.");
567: }
568: return $answer;
569: }
570:
571: # ----------------------- Try to determine user's current authentication scheme
572:
573: sub queryauthenticate {
574: my ($uname,$udom)=@_;
575: my $uhome=&homeserver($uname,$udom);
576: if (!$uhome) {
577: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
578: return 'no_host';
579: }
580: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
581: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
582: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
583: }
584: return $answer;
585: }
586:
587: # --------- Try to authenticate user from domain's lib servers (first this one)
588:
589: sub authenticate {
590: my ($uname,$upass,$udom)=@_;
591: $upass=escape($upass);
592: $uname=~s/\W//g;
593: my $uhome=&homeserver($uname,$udom);
594: if (!$uhome) {
595: &logthis("User $uname at $udom is unknown in authenticate");
596: return 'no_host';
597: }
598: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
599: if ($answer eq 'authorized') {
600: &logthis("User $uname at $udom authorized by $uhome");
601: return $uhome;
602: }
603: if ($answer eq 'non_authorized') {
604: &logthis("User $uname at $udom rejected by $uhome");
605: return 'no_host';
606: }
607: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
608: return 'no_host';
609: }
610:
611: # ---------------------- Find the homebase for a user from domain's lib servers
612:
613: my %homecache;
614: sub homeserver {
615: my ($uname,$udom,$ignoreBadCache)=@_;
616: my $index="$uname:$udom";
617:
618: if (exists($homecache{$index})) { return $homecache{$index}; }
619: my $tryserver;
620: foreach $tryserver (keys %libserv) {
621: next if ($ignoreBadCache ne 'true' &&
622: exists($badServerCache{$tryserver}));
623: if ($hostdom{$tryserver} eq $udom) {
624: my $answer=reply("home:$udom:$uname",$tryserver);
625: if ($answer eq 'found') {
626: return $homecache{$index}=$tryserver;
627: } elsif ($answer eq 'no_host') {
628: $badServerCache{$tryserver}=1;
629: }
630: }
631: }
632: return 'no_host';
633: }
634:
635: # ------------------------------------- Find the usernames behind a list of IDs
636:
637: sub idget {
638: my ($udom,@ids)=@_;
639: my %returnhash=();
640:
641: my $tryserver;
642: foreach $tryserver (keys %libserv) {
643: if ($hostdom{$tryserver} eq $udom) {
644: my $idlist=join('&',@ids);
645: $idlist=~tr/A-Z/a-z/;
646: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
647: my @answer=();
648: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
649: @answer=split(/\&/,$reply);
650: } ;
651: my $i;
652: for ($i=0;$i<=$#ids;$i++) {
653: if ($answer[$i]) {
654: $returnhash{$ids[$i]}=$answer[$i];
655: }
656: }
657: }
658: }
659: return %returnhash;
660: }
661:
662: # ------------------------------------- Find the IDs behind a list of usernames
663:
664: sub idrget {
665: my ($udom,@unames)=@_;
666: my %returnhash=();
667: foreach (@unames) {
668: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
669: }
670: return %returnhash;
671: }
672:
673: # ------------------------------- Store away a list of names and associated IDs
674:
675: sub idput {
676: my ($udom,%ids)=@_;
677: my %servers=();
678: foreach (keys %ids) {
679: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
680: my $uhom=&homeserver($_,$udom);
681: if ($uhom ne 'no_host') {
682: my $id=&escape($ids{$_});
683: $id=~tr/A-Z/a-z/;
684: my $unam=&escape($_);
685: if ($servers{$uhom}) {
686: $servers{$uhom}.='&'.$id.'='.$unam;
687: } else {
688: $servers{$uhom}=$id.'='.$unam;
689: }
690: }
691: }
692: foreach (keys %servers) {
693: &critical('idput:'.$udom.':'.$servers{$_},$_);
694: }
695: }
696:
697: # --------------------------------------------------- Assign a key to a student
698:
699: sub assign_access_key {
700: #
701: # a valid key looks like uname:udom#comments
702: # comments are being appended
703: #
704: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
705: $kdom=
706: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
707: $knum=
708: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
709: $cdom=
710: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
711: $cnum=
712: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
713: $udom=$env{'user.name'} unless (defined($udom));
714: $uname=$env{'user.domain'} unless (defined($uname));
715: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
716: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
717: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
718: # assigned to this person
719: # - this should not happen,
720: # unless something went wrong
721: # the first time around
722: # ready to assign
723: $logentry=$1.'; '.$logentry;
724: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
725: $kdom,$knum) eq 'ok') {
726: # key now belongs to user
727: my $envkey='key.'.$cdom.'_'.$cnum;
728: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
729: &appenv('environment.'.$envkey => $ckey);
730: return 'ok';
731: } else {
732: return
733: 'error: Count not permanently assign key, will need to be re-entered later.';
734: }
735: } else {
736: return 'error: Could not assign key, try again later.';
737: }
738: } elsif (!$existing{$ckey}) {
739: # the key does not exist
740: return 'error: The key does not exist';
741: } else {
742: # the key is somebody else's
743: return 'error: The key is already in use';
744: }
745: }
746:
747: # ------------------------------------------ put an additional comment on a key
748:
749: sub comment_access_key {
750: #
751: # a valid key looks like uname:udom#comments
752: # comments are being appended
753: #
754: my ($ckey,$cdom,$cnum,$logentry)=@_;
755: $cdom=
756: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
757: $cnum=
758: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
759: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
760: if ($existing{$ckey}) {
761: $existing{$ckey}.='; '.$logentry;
762: # ready to assign
763: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
764: $cdom,$cnum) eq 'ok') {
765: return 'ok';
766: } else {
767: return 'error: Count not store comment.';
768: }
769: } else {
770: # the key does not exist
771: return 'error: The key does not exist';
772: }
773: }
774:
775: # ------------------------------------------------------ Generate a set of keys
776:
777: sub generate_access_keys {
778: my ($number,$cdom,$cnum,$logentry)=@_;
779: $cdom=
780: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
781: $cnum=
782: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
783: unless (&allowed('mky',$cdom)) { return 0; }
784: unless (($cdom) && ($cnum)) { return 0; }
785: if ($number>10000) { return 0; }
786: sleep(2); # make sure don't get same seed twice
787: srand(time()^($$+($$<<15))); # from "Programming Perl"
788: my $total=0;
789: for (my $i=1;$i<=$number;$i++) {
790: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
791: sprintf("%lx",int(100000*rand)).'-'.
792: sprintf("%lx",int(100000*rand));
793: $newkey=~s/1/g/g; # folks mix up 1 and l
794: $newkey=~s/0/h/g; # and also 0 and O
795: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
796: if ($existing{$newkey}) {
797: $i--;
798: } else {
799: if (&put('accesskeys',
800: { $newkey => '# generated '.localtime().
801: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
802: '; '.$logentry },
803: $cdom,$cnum) eq 'ok') {
804: $total++;
805: }
806: }
807: }
808: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
809: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
810: return $total;
811: }
812:
813: # ------------------------------------------------------- Validate an accesskey
814:
815: sub validate_access_key {
816: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
817: $cdom=
818: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
819: $cnum=
820: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
821: $udom=$env{'user.domain'} unless (defined($udom));
822: $uname=$env{'user.name'} unless (defined($uname));
823: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
824: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
825: }
826:
827: # ------------------------------------- Find the section of student in a course
828: sub devalidate_getsection_cache {
829: my ($udom,$unam,$courseid)=@_;
830: $courseid=~s/\_/\//g;
831: $courseid=~s/^(\w)/\/$1/;
832: my $hashid="$udom:$unam:$courseid";
833: &devalidate_cache_new('getsection',$hashid);
834: }
835:
836: sub getsection {
837: my ($udom,$unam,$courseid)=@_;
838: my $cachetime=1800;
839: $courseid=~s/\_/\//g;
840: $courseid=~s/^(\w)/\/$1/;
841:
842: my $hashid="$udom:$unam:$courseid";
843: my ($result,$cached)=&is_cached_new('getsection',$hashid);
844: if (defined($cached)) { return $result; }
845:
846: my %Pending;
847: my %Expired;
848: #
849: # Each role can either have not started yet (pending), be active,
850: # or have expired.
851: #
852: # If there is an active role, we are done.
853: #
854: # If there is more than one role which has not started yet,
855: # choose the one which will start sooner
856: # If there is one role which has not started yet, return it.
857: #
858: # If there is more than one expired role, choose the one which ended last.
859: # If there is a role which has expired, return it.
860: #
861: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
862: &homeserver($unam,$udom)))) {
863: my ($key,$value)=split(/\=/,$_);
864: $key=&unescape($key);
865: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
866: my $section=$1;
867: if ($key eq $courseid.'_st') { $section=''; }
868: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
869: my $now=time;
870: if (defined($end) && $end && ($now > $end)) {
871: $Expired{$end}=$section;
872: next;
873: }
874: if (defined($start) && $start && ($now < $start)) {
875: $Pending{$start}=$section;
876: next;
877: }
878: return &do_cache_new('getsection',$hashid,$section,$cachetime);
879: }
880: #
881: # Presumedly there will be few matching roles from the above
882: # loop and the sorting time will be negligible.
883: if (scalar(keys(%Pending))) {
884: my ($time) = sort {$a <=> $b} keys(%Pending);
885: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
886: }
887: if (scalar(keys(%Expired))) {
888: my @sorted = sort {$a <=> $b} keys(%Expired);
889: my $time = pop(@sorted);
890: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
891: }
892: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
893: }
894:
895: sub save_cache {
896: &purge_remembered();
897: #&Apache::loncommon::validate_page();
898: undef(%env);
899: undef($env_loaded);
900: }
901:
902: my $to_remember=-1;
903: my %remembered;
904: my %accessed;
905: my $kicks=0;
906: my $hits=0;
907: sub devalidate_cache_new {
908: my ($name,$id,$debug) = @_;
909: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
910: $id=&escape($name.':'.$id);
911: $memcache->delete($id);
912: delete($remembered{$id});
913: delete($accessed{$id});
914: }
915:
916: sub is_cached_new {
917: my ($name,$id,$debug) = @_;
918: $id=&escape($name.':'.$id);
919: if (exists($remembered{$id})) {
920: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
921: $accessed{$id}=[&gettimeofday()];
922: $hits++;
923: return ($remembered{$id},1);
924: }
925: my $value = $memcache->get($id);
926: if (!(defined($value))) {
927: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
928: return (undef,undef);
929: }
930: if ($value eq '__undef__') {
931: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
932: $value=undef;
933: }
934: &make_room($id,$value,$debug);
935: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
936: return ($value,1);
937: }
938:
939: sub do_cache_new {
940: my ($name,$id,$value,$time,$debug) = @_;
941: $id=&escape($name.':'.$id);
942: my $setvalue=$value;
943: if (!defined($setvalue)) {
944: $setvalue='__undef__';
945: }
946: if (!defined($time) ) {
947: $time=600;
948: }
949: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
950: $memcache->set($id,$setvalue,$time);
951: # need to make a copy of $value
952: #&make_room($id,$value,$debug);
953: return $value;
954: }
955:
956: sub make_room {
957: my ($id,$value,$debug)=@_;
958: $remembered{$id}=$value;
959: if ($to_remember<0) { return; }
960: $accessed{$id}=[&gettimeofday()];
961: if (scalar(keys(%remembered)) <= $to_remember) { return; }
962: my $to_kick;
963: my $max_time=0;
964: foreach my $other (keys(%accessed)) {
965: if (&tv_interval($accessed{$other}) > $max_time) {
966: $to_kick=$other;
967: $max_time=&tv_interval($accessed{$other});
968: }
969: }
970: delete($remembered{$to_kick});
971: delete($accessed{$to_kick});
972: $kicks++;
973: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
974: return;
975: }
976:
977: sub purge_remembered {
978: #&logthis("Tossing ".scalar(keys(%remembered)));
979: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
980: undef(%remembered);
981: undef(%accessed);
982: }
983: # ------------------------------------- Read an entry from a user's environment
984:
985: sub userenvironment {
986: my ($udom,$unam,@what)=@_;
987: my %returnhash=();
988: my @answer=split(/\&/,
989: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
990: &homeserver($unam,$udom)));
991: my $i;
992: for ($i=0;$i<=$#what;$i++) {
993: $returnhash{$what[$i]}=&unescape($answer[$i]);
994: }
995: return %returnhash;
996: }
997:
998: # ---------------------------------------------------------- Get a studentphoto
999: sub studentphoto {
1000: my ($udom,$unam,$ext) = @_;
1001: my $home=&Apache::lonnet::homeserver($unam,$udom);
1002: if (defined($env{'request.course.id'})) {
1003: if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
1004: if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
1005: return(&retrievestudentphoto($udom,$unam,$ext));
1006: } else {
1007: my ($result,$perm_reqd)=
1008: &Apache::lonnet::auto_photo_permission($unam,$udom);
1009: if ($result eq 'ok') {
1010: if (!($perm_reqd eq 'yes')) {
1011: return(&retrievestudentphoto($udom,$unam,$ext));
1012: }
1013: }
1014: }
1015: }
1016: } else {
1017: my ($result,$perm_reqd) =
1018: &Apache::lonnet::auto_photo_permission($unam,$udom);
1019: if ($result eq 'ok') {
1020: if (!($perm_reqd eq 'yes')) {
1021: return(&retrievestudentphoto($udom,$unam,$ext));
1022: }
1023: }
1024: }
1025: return '/adm/lonKaputt/lonlogo_broken.gif';
1026: }
1027:
1028: sub retrievestudentphoto {
1029: my ($udom,$unam,$ext,$type) = @_;
1030: my $home=&Apache::lonnet::homeserver($unam,$udom);
1031: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
1032: if ($ret eq 'ok') {
1033: my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
1034: if ($type eq 'thumbnail') {
1035: $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
1036: }
1037: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
1038: return $tokenurl;
1039: } else {
1040: if ($type eq 'thumbnail') {
1041: return '/adm/lonKaputt/genericstudent_tn.gif';
1042: } else {
1043: return '/adm/lonKaputt/lonlogo_broken.gif';
1044: }
1045: }
1046: }
1047:
1048: # -------------------------------------------------------------------- New chat
1049:
1050: sub chatsend {
1051: my ($newentry,$anon,$group)=@_;
1052: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1053: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1054: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1055: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1056: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
1057: &escape($newentry)).':'.$group,$chome);
1058: }
1059:
1060: # ------------------------------------------ Find current version of a resource
1061:
1062: sub getversion {
1063: my $fname=&clutter(shift);
1064: unless ($fname=~/^\/res\//) { return -1; }
1065: return ¤tversion(&filelocation('',$fname));
1066: }
1067:
1068: sub currentversion {
1069: my $fname=shift;
1070: my ($result,$cached)=&is_cached_new('resversion',$fname);
1071: if (defined($cached)) { return $result; }
1072: my $author=$fname;
1073: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1074: my ($udom,$uname)=split(/\//,$author);
1075: my $home=homeserver($uname,$udom);
1076: if ($home eq 'no_host') {
1077: return -1;
1078: }
1079: my $answer=reply("currentversion:$fname",$home);
1080: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1081: return -1;
1082: }
1083: return &do_cache_new('resversion',$fname,$answer,600);
1084: }
1085:
1086: # ----------------------------- Subscribe to a resource, return URL if possible
1087:
1088: sub subscribe {
1089: my $fname=shift;
1090: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1091: $fname=~s/[\n\r]//g;
1092: my $author=$fname;
1093: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1094: my ($udom,$uname)=split(/\//,$author);
1095: my $home=homeserver($uname,$udom);
1096: if ($home eq 'no_host') {
1097: return 'not_found';
1098: }
1099: my $answer=reply("sub:$fname",$home);
1100: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1101: $answer.=' by '.$home;
1102: }
1103: return $answer;
1104: }
1105:
1106: # -------------------------------------------------------------- Replicate file
1107:
1108: sub repcopy {
1109: my $filename=shift;
1110: $filename=~s/\/+/\//g;
1111: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1112: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1113: if ($filename=~m|^/home/httpd/html/userfiles/| or
1114: $filename=~m -^/*(uploaded|editupload)/-) {
1115: return &repcopy_userfile($filename);
1116: }
1117: $filename=~s/[\n\r]//g;
1118: my $transname="$filename.in.transfer";
1119: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1120: my $remoteurl=subscribe($filename);
1121: if ($remoteurl =~ /^con_lost by/) {
1122: &logthis("Subscribe returned $remoteurl: $filename");
1123: return 'unavailable';
1124: } elsif ($remoteurl eq 'not_found') {
1125: #&logthis("Subscribe returned not_found: $filename");
1126: return 'not_found';
1127: } elsif ($remoteurl =~ /^rejected by/) {
1128: &logthis("Subscribe returned $remoteurl: $filename");
1129: return 'forbidden';
1130: } elsif ($remoteurl eq 'directory') {
1131: return 'ok';
1132: } else {
1133: my $author=$filename;
1134: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1135: my ($udom,$uname)=split(/\//,$author);
1136: my $home=homeserver($uname,$udom);
1137: unless ($home eq $perlvar{'lonHostID'}) {
1138: my @parts=split(/\//,$filename);
1139: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1140: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1141: &logthis("Malconfiguration for replication: $filename");
1142: return 'bad_request';
1143: }
1144: my $count;
1145: for ($count=5;$count<$#parts;$count++) {
1146: $path.="/$parts[$count]";
1147: if ((-e $path)!=1) {
1148: mkdir($path,0777);
1149: }
1150: }
1151: my $ua=new LWP::UserAgent;
1152: my $request=new HTTP::Request('GET',"$remoteurl");
1153: my $response=$ua->request($request,$transname);
1154: if ($response->is_error()) {
1155: unlink($transname);
1156: my $message=$response->status_line;
1157: &logthis("<font color=\"blue\">WARNING:"
1158: ." LWP get: $message: $filename</font>");
1159: return 'unavailable';
1160: } else {
1161: if ($remoteurl!~/\.meta$/) {
1162: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1163: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1164: if ($mresponse->is_error()) {
1165: unlink($filename.'.meta');
1166: &logthis(
1167: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1168: }
1169: }
1170: rename($transname,$filename);
1171: return 'ok';
1172: }
1173: }
1174: }
1175: }
1176:
1177: # ------------------------------------------------ Get server side include body
1178: sub ssi_body {
1179: my ($filelink,%form)=@_;
1180: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1181: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1182: }
1183: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1184: &ssi($filelink,%form));
1185: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
1186: $output=~s/^.*?\<body[^\>]*\>//si;
1187: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1188: return $output;
1189: }
1190:
1191: # --------------------------------------------------------- Server Side Include
1192:
1193: sub absolute_url {
1194: my ($host_name) = @_;
1195: my $protocol = ($ENV{'SERVER_PORT'} == 443?'https://':'http://');
1196: if ($host_name eq '') {
1197: $host_name = $ENV{'SERVER_NAME'};
1198: }
1199: return $protocol.$host_name;
1200: }
1201:
1202: sub ssi {
1203:
1204: my ($fn,%form)=@_;
1205:
1206: my $ua=new LWP::UserAgent;
1207:
1208: my $request;
1209:
1210: $form{'no_update_last_known'}=1;
1211:
1212: if (%form) {
1213: $request=new HTTP::Request('POST',&absolute_url().$fn);
1214: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1215: } else {
1216: $request=new HTTP::Request('GET',&absolute_url().$fn);
1217: }
1218:
1219: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1220: my $response=$ua->request($request);
1221:
1222: return $response->content;
1223: }
1224:
1225: sub externalssi {
1226: my ($url)=@_;
1227: my $ua=new LWP::UserAgent;
1228: my $request=new HTTP::Request('GET',$url);
1229: my $response=$ua->request($request);
1230: return $response->content;
1231: }
1232:
1233: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1234:
1235: sub allowuploaded {
1236: my ($srcurl,$url)=@_;
1237: $url=&clutter(&declutter($url));
1238: my $dir=$url;
1239: $dir=~s/\/[^\/]+$//;
1240: my %httpref=();
1241: my $httpurl=&hreflocation('',$url);
1242: $httpref{'httpref.'.$httpurl}=$srcurl;
1243: &Apache::lonnet::appenv(%httpref);
1244: }
1245:
1246: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1247: # input: action, courseID, current domain, intended
1248: # path to file, source of file, instruction to parse file for objects,
1249: # ref to hash for embedded objects,
1250: # ref to hash for codebase of java objects.
1251: #
1252: # output: url to file (if action was uploaddoc),
1253: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1254: #
1255: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1256: # course.
1257: #
1258: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1259: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1260: # course's home server.
1261: #
1262: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1263: # be copied from $source (current location) to
1264: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1265: # and will then be copied to
1266: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1267: # course's home server.
1268: #
1269: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1270: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1271: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1272: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1273: # in course's home server.
1274: #
1275:
1276: sub process_coursefile {
1277: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1278: my $fetchresult;
1279: my $home=&homeserver($docuname,$docudom);
1280: if ($action eq 'propagate') {
1281: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1282: $home);
1283: } else {
1284: my $fpath = '';
1285: my $fname = $file;
1286: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1287: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1288: my $filepath = &build_filepath($fpath);
1289: if ($action eq 'copy') {
1290: if ($source eq '') {
1291: $fetchresult = 'no source file';
1292: return $fetchresult;
1293: } else {
1294: my $destination = $filepath.'/'.$fname;
1295: rename($source,$destination);
1296: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1297: $home);
1298: }
1299: } elsif ($action eq 'uploaddoc') {
1300: open(my $fh,'>'.$filepath.'/'.$fname);
1301: print $fh $env{'form.'.$source};
1302: close($fh);
1303: if ($parser eq 'parse') {
1304: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1305: unless ($parse_result eq 'ok') {
1306: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1307: }
1308: }
1309: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1310: $home);
1311: if ($fetchresult eq 'ok') {
1312: return '/uploaded/'.$fpath.'/'.$fname;
1313: } else {
1314: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1315: ' to host '.$home.': '.$fetchresult);
1316: return '/adm/notfound.html';
1317: }
1318: }
1319: }
1320: unless ( $fetchresult eq 'ok') {
1321: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1322: ' to host '.$home.': '.$fetchresult);
1323: }
1324: return $fetchresult;
1325: }
1326:
1327: sub build_filepath {
1328: my ($fpath) = @_;
1329: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1330: unless ($fpath eq '') {
1331: my @parts=split('/',$fpath);
1332: foreach my $part (@parts) {
1333: $filepath.= '/'.$part;
1334: if ((-e $filepath)!=1) {
1335: mkdir($filepath,0777);
1336: }
1337: }
1338: }
1339: return $filepath;
1340: }
1341:
1342: sub store_edited_file {
1343: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1344: my $file = $primary_url;
1345: $file =~ s#^/uploaded/$docudom/$docuname/##;
1346: my $fpath = '';
1347: my $fname = $file;
1348: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1349: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1350: my $filepath = &build_filepath($fpath);
1351: open(my $fh,'>'.$filepath.'/'.$fname);
1352: print $fh $content;
1353: close($fh);
1354: my $home=&homeserver($docuname,$docudom);
1355: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1356: $home);
1357: if ($$fetchresult eq 'ok') {
1358: return '/uploaded/'.$fpath.'/'.$fname;
1359: } else {
1360: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1361: ' to host '.$home.': '.$$fetchresult);
1362: return '/adm/notfound.html';
1363: }
1364: }
1365:
1366: sub clean_filename {
1367: my ($fname)=@_;
1368: # Replace Windows backslashes by forward slashes
1369: $fname=~s/\\/\//g;
1370: # Get rid of everything but the actual filename
1371: $fname=~s/^.*\/([^\/]+)$/$1/;
1372: # Replace spaces by underscores
1373: $fname=~s/\s+/\_/g;
1374: # Replace all other weird characters by nothing
1375: $fname=~s/[^\w\.\-]//g;
1376: # Replace all .\d. sequences with _\d. so they no longer look like version
1377: # numbers
1378: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1379: return $fname;
1380: }
1381:
1382: # --------------- Take an uploaded file and put it into the userfiles directory
1383: # input: $formname - the contents of the file are in $env{"form.$formname"}
1384: # the desired filenam is in $env{"form.$formname.filename"}
1385: # $coursedoc - if true up to the current course
1386: # if false
1387: # $subdir - directory in userfile to store the file into
1388: # $parser, $allfiles, $codebase - unknown
1389: #
1390: # output: url of file in userspace, or error: <message>
1391: # or /adm/notfound.html if failure to upload occurse
1392:
1393:
1394: sub userfileupload {
1395: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,$destudom)=@_;
1396: if (!defined($subdir)) { $subdir='unknown'; }
1397: my $fname=$env{'form.'.$formname.'.filename'};
1398: $fname=&clean_filename($fname);
1399: # See if there is anything left
1400: unless ($fname) { return 'error: no uploaded file'; }
1401: chop($env{'form.'.$formname});
1402: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1403: my $now = time;
1404: my $filepath = 'tmp/helprequests/'.$now;
1405: my @parts=split(/\//,$filepath);
1406: my $fullpath = $perlvar{'lonDaemons'};
1407: for (my $i=0;$i<@parts;$i++) {
1408: $fullpath .= '/'.$parts[$i];
1409: if ((-e $fullpath)!=1) {
1410: mkdir($fullpath,0777);
1411: }
1412: }
1413: open(my $fh,'>'.$fullpath.'/'.$fname);
1414: print $fh $env{'form.'.$formname};
1415: close($fh);
1416: return $fullpath.'/'.$fname;
1417: } elsif (($formname eq 'coursecreatorxml') && ($subdir eq 'batchupload')) { #files uploaded to create course page are handled differently
1418: my $filepath = 'tmp/addcourse/'.$destudom.'/web/'.$env{'user.name'}.
1419: '_'.$env{'user.domain'}.'/pending';
1420: my @parts=split(/\//,$filepath);
1421: my $fullpath = $perlvar{'lonDaemons'};
1422: for (my $i=0;$i<@parts;$i++) {
1423: $fullpath .= '/'.$parts[$i];
1424: if ((-e $fullpath)!=1) {
1425: mkdir($fullpath,0777);
1426: }
1427: }
1428: open(my $fh,'>'.$fullpath.'/'.$fname);
1429: print $fh $env{'form.'.$formname};
1430: close($fh);
1431: return $fullpath.'/'.$fname;
1432: }
1433:
1434: # Create the directory if not present
1435: $fname="$subdir/$fname";
1436: if ($coursedoc) {
1437: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1438: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1439: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1440: return &finishuserfileupload($docuname,$docudom,
1441: $formname,$fname,$parser,$allfiles,
1442: $codebase);
1443: } else {
1444: $fname=$env{'form.folder'}.'/'.$fname;
1445: return &process_coursefile('uploaddoc',$docuname,$docudom,
1446: $fname,$formname,$parser,
1447: $allfiles,$codebase);
1448: }
1449: } elsif (defined($destuname)) {
1450: my $docuname=$destuname;
1451: my $docudom=$destudom;
1452: return &finishuserfileupload($docuname,$docudom,$formname,
1453: $fname,$parser,$allfiles,$codebase);
1454:
1455: } else {
1456: my $docuname=$env{'user.name'};
1457: my $docudom=$env{'user.domain'};
1458: if (exists($env{'form.group'})) {
1459: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1460: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1461: }
1462: return &finishuserfileupload($docuname,$docudom,$formname,
1463: $fname,$parser,$allfiles,$codebase);
1464: }
1465: }
1466:
1467: sub finishuserfileupload {
1468: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
1469: my $path=$docudom.'/'.$docuname.'/';
1470: my $filepath=$perlvar{'lonDocRoot'};
1471: my ($fnamepath,$file);
1472: $file=$fname;
1473: if ($fname=~m|/|) {
1474: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1475: $path.=$fnamepath.'/';
1476: }
1477: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1478: my $count;
1479: for ($count=4;$count<=$#parts;$count++) {
1480: $filepath.="/$parts[$count]";
1481: if ((-e $filepath)!=1) {
1482: mkdir($filepath,0777);
1483: }
1484: }
1485: # Save the file
1486: {
1487: if (!open(FH,'>'.$filepath.'/'.$file)) {
1488: &logthis('Failed to create '.$filepath.'/'.$file);
1489: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1490: return '/adm/notfound.html';
1491: }
1492: if (!print FH ($env{'form.'.$formname})) {
1493: &logthis('Failed to write to '.$filepath.'/'.$file);
1494: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1495: return '/adm/notfound.html';
1496: }
1497: close(FH);
1498: }
1499: if ($parser eq 'parse') {
1500: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1501: $codebase);
1502: unless ($parse_result eq 'ok') {
1503: &logthis('Failed to parse '.$filepath.$file.
1504: ' for embedded media: '.$parse_result);
1505: }
1506: }
1507: # Notify homeserver to grep it
1508: #
1509: my $docuhome=&homeserver($docuname,$docudom);
1510: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1511: if ($fetchresult eq 'ok') {
1512: #
1513: # Return the URL to it
1514: return '/uploaded/'.$path.$file;
1515: } else {
1516: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1517: ': '.$fetchresult);
1518: return '/adm/notfound.html';
1519: }
1520: }
1521:
1522: sub extract_embedded_items {
1523: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1524: my @state = ();
1525: my %javafiles = (
1526: codebase => '',
1527: code => '',
1528: archive => ''
1529: );
1530: my %mediafiles = (
1531: src => '',
1532: movie => '',
1533: );
1534: my $p;
1535: if ($content) {
1536: $p = HTML::LCParser->new($content);
1537: } else {
1538: $p = HTML::LCParser->new($filepath.'/'.$file);
1539: }
1540: while (my $t=$p->get_token()) {
1541: if ($t->[0] eq 'S') {
1542: my ($tagname, $attr) = ($t->[1],$t->[2]);
1543: push (@state, $tagname);
1544: if (lc($tagname) eq 'allow') {
1545: &add_filetype($allfiles,$attr->{'src'},'src');
1546: }
1547: if (lc($tagname) eq 'img') {
1548: &add_filetype($allfiles,$attr->{'src'},'src');
1549: }
1550: if (lc($tagname) eq 'script') {
1551: if ($attr->{'archive'} =~ /\.jar$/i) {
1552: &add_filetype($allfiles,$attr->{'archive'},'archive');
1553: } else {
1554: &add_filetype($allfiles,$attr->{'src'},'src');
1555: }
1556: }
1557: if (lc($tagname) eq 'link') {
1558: if (lc($attr->{'rel'}) eq 'stylesheet') {
1559: &add_filetype($allfiles,$attr->{'href'},'href');
1560: }
1561: }
1562: if (lc($tagname) eq 'object' ||
1563: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1564: foreach my $item (keys(%javafiles)) {
1565: $javafiles{$item} = '';
1566: }
1567: }
1568: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1569: my $name = lc($attr->{'name'});
1570: foreach my $item (keys(%javafiles)) {
1571: if ($name eq $item) {
1572: $javafiles{$item} = $attr->{'value'};
1573: last;
1574: }
1575: }
1576: foreach my $item (keys(%mediafiles)) {
1577: if ($name eq $item) {
1578: &add_filetype($allfiles, $attr->{'value'}, 'value');
1579: last;
1580: }
1581: }
1582: }
1583: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1584: foreach my $item (keys(%javafiles)) {
1585: if ($attr->{$item}) {
1586: $javafiles{$item} = $attr->{$item};
1587: last;
1588: }
1589: }
1590: foreach my $item (keys(%mediafiles)) {
1591: if ($attr->{$item}) {
1592: &add_filetype($allfiles,$attr->{$item},$item);
1593: last;
1594: }
1595: }
1596: }
1597: } elsif ($t->[0] eq 'E') {
1598: my ($tagname) = ($t->[1]);
1599: if ($javafiles{'codebase'} ne '') {
1600: $javafiles{'codebase'} .= '/';
1601: }
1602: if (lc($tagname) eq 'applet' ||
1603: lc($tagname) eq 'object' ||
1604: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1605: ) {
1606: foreach my $item (keys(%javafiles)) {
1607: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1608: my $file=$javafiles{'codebase'}.$javafiles{$item};
1609: &add_filetype($allfiles,$file,$item);
1610: }
1611: }
1612: }
1613: pop @state;
1614: }
1615: }
1616: return 'ok';
1617: }
1618:
1619: sub add_filetype {
1620: my ($allfiles,$file,$type)=@_;
1621: if (exists($allfiles->{$file})) {
1622: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1623: push(@{$allfiles->{$file}}, &escape($type));
1624: }
1625: } else {
1626: @{$allfiles->{$file}} = (&escape($type));
1627: }
1628: }
1629:
1630: sub removeuploadedurl {
1631: my ($url)=@_;
1632: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1633: return &removeuserfile($uname,$udom,$fname);
1634: }
1635:
1636: sub removeuserfile {
1637: my ($docuname,$docudom,$fname)=@_;
1638: my $home=&homeserver($docuname,$docudom);
1639: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1640: }
1641:
1642: sub mkdiruserfile {
1643: my ($docuname,$docudom,$dir)=@_;
1644: my $home=&homeserver($docuname,$docudom);
1645: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1646: }
1647:
1648: sub renameuserfile {
1649: my ($docuname,$docudom,$old,$new)=@_;
1650: my $home=&homeserver($docuname,$docudom);
1651: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1652: &escape("$new"),$home);
1653: }
1654:
1655: # ------------------------------------------------------------------------- Log
1656:
1657: sub log {
1658: my ($dom,$nam,$hom,$what)=@_;
1659: return critical("log:$dom:$nam:$what",$hom);
1660: }
1661:
1662: # ------------------------------------------------------------------ Course Log
1663: #
1664: # This routine flushes several buffers of non-mission-critical nature
1665: #
1666:
1667: sub flushcourselogs {
1668: &logthis('Flushing log buffers');
1669: #
1670: # course logs
1671: # This is a log of all transactions in a course, which can be used
1672: # for data mining purposes
1673: #
1674: # It also collects the courseid database, which lists last transaction
1675: # times and course titles for all courseids
1676: #
1677: my %courseidbuffer=();
1678: foreach (keys %courselogs) {
1679: my $crsid=$_;
1680: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1681: &escape($courselogs{$crsid}),
1682: $coursehombuf{$crsid}) eq 'ok') {
1683: delete $courselogs{$crsid};
1684: } else {
1685: &logthis('Failed to flush log buffer for '.$crsid);
1686: if (length($courselogs{$crsid})>40000) {
1687: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
1688: " exceeded maximum size, deleting.</font>");
1689: delete $courselogs{$crsid};
1690: }
1691: }
1692: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1693: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1694: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1695: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1696: } else {
1697: $courseidbuffer{$coursehombuf{$crsid}}=
1698: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1699: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1700: }
1701: }
1702: #
1703: # Write course id database (reverse lookup) to homeserver of courses
1704: # Is used in pickcourse
1705: #
1706: foreach (keys %courseidbuffer) {
1707: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1708: }
1709: #
1710: # File accesses
1711: # Writes to the dynamic metadata of resources to get hit counts, etc.
1712: #
1713: foreach my $entry (keys(%accesshash)) {
1714: if ($entry =~ /___count$/) {
1715: my ($dom,$name);
1716: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1717: if (! defined($dom) || $dom eq '' ||
1718: ! defined($name) || $name eq '') {
1719: my $cid = $env{'request.course.id'};
1720: $dom = $env{'request.'.$cid.'.domain'};
1721: $name = $env{'request.'.$cid.'.num'};
1722: }
1723: my $value = $accesshash{$entry};
1724: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1725: my %temphash=($url => $value);
1726: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1727: if ($result eq 'ok') {
1728: delete $accesshash{$entry};
1729: } elsif ($result eq 'unknown_cmd') {
1730: # Target server has old code running on it.
1731: my %temphash=($entry => $value);
1732: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1733: delete $accesshash{$entry};
1734: }
1735: }
1736: } else {
1737: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1738: my %temphash=($entry => $accesshash{$entry});
1739: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1740: delete $accesshash{$entry};
1741: }
1742: }
1743: }
1744: #
1745: # Roles
1746: # Reverse lookup of user roles for course faculty/staff and co-authorship
1747: #
1748: foreach (keys %userrolehash) {
1749: my $entry=$_;
1750: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1751: split(/\:/,$entry);
1752: if (&Apache::lonnet::put('nohist_userroles',
1753: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1754: $rudom,$runame) eq 'ok') {
1755: delete $userrolehash{$entry};
1756: }
1757: }
1758: #
1759: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1760: #
1761: my %domrolebuffer = ();
1762: foreach my $entry (keys %domainrolehash) {
1763: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1764: if ($domrolebuffer{$rudom}) {
1765: $domrolebuffer{$rudom}.='&'.&escape($entry).
1766: '='.&escape($domainrolehash{$entry});
1767: } else {
1768: $domrolebuffer{$rudom}.=&escape($entry).
1769: '='.&escape($domainrolehash{$entry});
1770: }
1771: delete $domainrolehash{$entry};
1772: }
1773: foreach my $dom (keys(%domrolebuffer)) {
1774: foreach my $tryserver (keys %libserv) {
1775: if ($hostdom{$tryserver} eq $dom) {
1776: unless (&reply('domroleput:'.$dom.':'.
1777: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1778: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1779: }
1780: }
1781: }
1782: }
1783: $dumpcount++;
1784: }
1785:
1786: sub courselog {
1787: my $what=shift;
1788: $what=time.':'.$what;
1789: unless ($env{'request.course.id'}) { return ''; }
1790: $coursedombuf{$env{'request.course.id'}}=
1791: $env{'course.'.$env{'request.course.id'}.'.domain'};
1792: $coursenumbuf{$env{'request.course.id'}}=
1793: $env{'course.'.$env{'request.course.id'}.'.num'};
1794: $coursehombuf{$env{'request.course.id'}}=
1795: $env{'course.'.$env{'request.course.id'}.'.home'};
1796: $coursedescrbuf{$env{'request.course.id'}}=
1797: $env{'course.'.$env{'request.course.id'}.'.description'};
1798: $courseinstcodebuf{$env{'request.course.id'}}=
1799: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1800: $courseownerbuf{$env{'request.course.id'}}=
1801: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1802: $coursetypebuf{$env{'request.course.id'}}=
1803: $env{'course.'.$env{'request.course.id'}.'.type'};
1804: if (defined $courselogs{$env{'request.course.id'}}) {
1805: $courselogs{$env{'request.course.id'}}.='&'.$what;
1806: } else {
1807: $courselogs{$env{'request.course.id'}}.=$what;
1808: }
1809: if (length($courselogs{$env{'request.course.id'}})>4048) {
1810: &flushcourselogs();
1811: }
1812: }
1813:
1814: sub courseacclog {
1815: my $fnsymb=shift;
1816: unless ($env{'request.course.id'}) { return ''; }
1817: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1818: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1819: $what.=':POST';
1820: # FIXME: Probably ought to escape things....
1821: foreach (keys %env) {
1822: if ($_=~/^form\.(.*)/) {
1823: $what.=':'.$1.'='.$env{$_};
1824: }
1825: }
1826: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1827: # FIXME: We should not be depending on a form parameter that someone
1828: # editing lonsearchcat.pm might change in the future.
1829: if ($env{'form.phase'} eq 'course_search') {
1830: $what.= ':POST';
1831: # FIXME: Probably ought to escape things....
1832: foreach my $element ('courseexp','crsfulltext','crsrelated',
1833: 'crsdiscuss') {
1834: $what.=':'.$element.'='.$env{'form.'.$element};
1835: }
1836: }
1837: }
1838: &courselog($what);
1839: }
1840:
1841: sub countacc {
1842: my $url=&declutter(shift);
1843: return if (! defined($url) || $url eq '');
1844: unless ($env{'request.course.id'}) { return ''; }
1845: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1846: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1847: $accesshash{$key}++;
1848: }
1849:
1850: sub linklog {
1851: my ($from,$to)=@_;
1852: $from=&declutter($from);
1853: $to=&declutter($to);
1854: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1855: $accesshash{$to.'___'.$from.'___goto'}=1;
1856: }
1857:
1858: sub userrolelog {
1859: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1860: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
1861: ($trole=~/^in/) || ($trole=~/^cc/) ||
1862: ($trole=~/^ep/) || ($trole=~/^cr/) ||
1863: ($trole=~/^ta/)) {
1864: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1865: $userrolehash
1866: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1867: =$tend.':'.$tstart;
1868: }
1869: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
1870: ($trole=~/^li/) || ($trole=~/^li/) ||
1871: ($trole=~/^au/) || ($trole=~/^dg/) ||
1872: ($trole=~/^sc/)) {
1873: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1874: $domainrolehash
1875: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1876: = $tend.':'.$tstart;
1877: }
1878: }
1879:
1880: sub get_course_adv_roles {
1881: my $cid=shift;
1882: $cid=$env{'request.course.id'} unless (defined($cid));
1883: my %coursehash=&coursedescription($cid);
1884: my %nothide=();
1885: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1886: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1887: }
1888: my %returnhash=();
1889: my %dumphash=
1890: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1891: my $now=time;
1892: foreach (keys %dumphash) {
1893: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1894: if (($tstart) && ($tstart<0)) { next; }
1895: if (($tend) && ($tend<$now)) { next; }
1896: if (($tstart) && ($now<$tstart)) { next; }
1897: my ($role,$username,$domain,$section)=split(/\:/,$_);
1898: if ($username eq '' || $domain eq '') { next; }
1899: if ((&privileged($username,$domain)) &&
1900: (!$nothide{$username.':'.$domain})) { next; }
1901: if ($role eq 'cr') { next; }
1902: my $key=&plaintext($role);
1903: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1904: if ($returnhash{$key}) {
1905: $returnhash{$key}.=','.$username.':'.$domain;
1906: } else {
1907: $returnhash{$key}=$username.':'.$domain;
1908: }
1909: }
1910: return %returnhash;
1911: }
1912:
1913: sub get_my_roles {
1914: my ($uname,$udom)=@_;
1915: unless (defined($uname)) { $uname=$env{'user.name'}; }
1916: unless (defined($udom)) { $udom=$env{'user.domain'}; }
1917: my %dumphash=
1918: &dump('nohist_userroles',$udom,$uname);
1919: my %returnhash=();
1920: my $now=time;
1921: foreach (keys %dumphash) {
1922: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1923: if (($tstart) && ($tstart<0)) { next; }
1924: if (($tend) && ($tend<$now)) { next; }
1925: if (($tstart) && ($now<$tstart)) { next; }
1926: my ($role,$username,$domain,$section)=split(/\:/,$_);
1927: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1928: }
1929: return %returnhash;
1930: }
1931:
1932: # ----------------------------------------------------- Frontpage Announcements
1933: #
1934: #
1935:
1936: sub postannounce {
1937: my ($server,$text)=@_;
1938: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1939: unless ($text=~/\w/) { $text=''; }
1940: return &reply('setannounce:'.&escape($text),$server);
1941: }
1942:
1943: sub getannounce {
1944:
1945: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1946: my $announcement='';
1947: while (<$fh>) { $announcement .=$_; }
1948: close($fh);
1949: if ($announcement=~/\w/) {
1950: return
1951: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1952: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1953: } else {
1954: return '';
1955: }
1956: } else {
1957: return '';
1958: }
1959: }
1960:
1961: # ---------------------------------------------------------- Course ID routines
1962: # Deal with domain's nohist_courseid.db files
1963: #
1964:
1965: sub courseidput {
1966: my ($domain,$what,$coursehome)=@_;
1967: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1968: }
1969:
1970: sub courseiddump {
1971: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref,$typefilter,$regexp_ok)=@_;
1972: my %returnhash=();
1973: unless ($domfilter) { $domfilter=''; }
1974: foreach my $tryserver (keys %libserv) {
1975: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1976: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1977: foreach (
1978: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1979: $sincefilter.':'.&escape($descfilter).':'.
1980: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter).':'.&escape($typefilter).':'.&escape($regexp_ok),
1981: $tryserver))) {
1982: my ($key,$value)=split(/\=/,$_);
1983: if (($key) && ($value)) {
1984: $returnhash{&unescape($key)}=$value;
1985: }
1986: }
1987: }
1988: }
1989: }
1990: return %returnhash;
1991: }
1992:
1993: # ---------------------------------------------------------- DC e-mail
1994:
1995: sub dcmailput {
1996: my ($domain,$msgid,$message,$server)=@_;
1997: my $status = &Apache::lonnet::critical(
1998: 'dcmailput:'.$domain.':'.&escape($msgid).'='.
1999: &escape($message),$server);
2000: return $status;
2001: }
2002:
2003: sub dcmaildump {
2004: my ($dom,$startdate,$enddate,$senders) = @_;
2005: my %returnhash=();
2006: if (exists($domain_primary{$dom})) {
2007: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
2008: &escape($enddate).':';
2009: my @esc_senders=map { &escape($_)} @$senders;
2010: $cmd.=&escape(join('&',@esc_senders));
2011: foreach (split(/\&/,&reply($cmd,$domain_primary{$dom}))) {
2012: my ($key,$value) = split(/\=/,$_);
2013: if (($key) && ($value)) {
2014: $returnhash{&unescape($key)} = &unescape($value);
2015: }
2016: }
2017: }
2018: return %returnhash;
2019: }
2020: # ---------------------------------------------------------- Domain roles
2021:
2022: sub get_domain_roles {
2023: my ($dom,$roles,$startdate,$enddate)=@_;
2024: if (undef($startdate) || $startdate eq '') {
2025: $startdate = '.';
2026: }
2027: if (undef($enddate) || $enddate eq '') {
2028: $enddate = '.';
2029: }
2030: my $rolelist = join(':',@{$roles});
2031: my %personnel = ();
2032: foreach my $tryserver (keys(%libserv)) {
2033: if ($hostdom{$tryserver} eq $dom) {
2034: %{$personnel{$tryserver}}=();
2035: foreach (
2036: split(/\&/,&reply('domrolesdump:'.$dom.':'.
2037: &escape($startdate).':'.&escape($enddate).':'.
2038: &escape($rolelist), $tryserver))) {
2039: my($key,$value) = split(/\=/,$_);
2040: if (($key) && ($value)) {
2041: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
2042: }
2043: }
2044: }
2045: }
2046: return %personnel;
2047: }
2048:
2049: # ----------------------------------------------------------- Check out an item
2050:
2051: sub get_first_access {
2052: my ($type,$argsymb)=@_;
2053: my ($symb,$courseid,$udom,$uname)=&whichuser();
2054: if ($argsymb) { $symb=$argsymb; }
2055: my ($map,$id,$res)=&decode_symb($symb);
2056: if ($type eq 'map') {
2057: $res=&symbread($map);
2058: } else {
2059: $res=$symb;
2060: }
2061: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
2062: return $times{"$courseid\0$res"};
2063: }
2064:
2065: sub set_first_access {
2066: my ($type)=@_;
2067: my ($symb,$courseid,$udom,$uname)=&whichuser();
2068: my ($map,$id,$res)=&decode_symb($symb);
2069: if ($type eq 'map') {
2070: $res=&symbread($map);
2071: } else {
2072: $res=$symb;
2073: }
2074: my $firstaccess=&get_first_access($type,$symb);
2075: if (!$firstaccess) {
2076: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
2077: }
2078: return 'already_set';
2079: }
2080:
2081: sub checkout {
2082: my ($symb,$tuname,$tudom,$tcrsid)=@_;
2083: my $now=time;
2084: my $lonhost=$perlvar{'lonHostID'};
2085: my $infostr=&escape(
2086: 'CHECKOUTTOKEN&'.
2087: $tuname.'&'.
2088: $tudom.'&'.
2089: $tcrsid.'&'.
2090: $symb.'&'.
2091: $now.'&'.$ENV{'REMOTE_ADDR'});
2092: my $token=&reply('tmpput:'.$infostr,$lonhost);
2093: if ($token=~/^error\:/) {
2094: &logthis("<font color=\"blue\">WARNING: ".
2095: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
2096: "</font>");
2097: return '';
2098: }
2099:
2100: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
2101: $token=~tr/a-z/A-Z/;
2102:
2103: my %infohash=('resource.0.outtoken' => $token,
2104: 'resource.0.checkouttime' => $now,
2105: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
2106:
2107: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2108: return '';
2109: } else {
2110: &logthis("<font color=\"blue\">WARNING: ".
2111: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
2112: "</font>");
2113: }
2114:
2115: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2116: &escape('Checkout '.$infostr.' - '.
2117: $token)) ne 'ok') {
2118: return '';
2119: } else {
2120: &logthis("<font color=\"blue\">WARNING: ".
2121: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
2122: "</font>");
2123: }
2124: return $token;
2125: }
2126:
2127: # ------------------------------------------------------------ Check in an item
2128:
2129: sub checkin {
2130: my $token=shift;
2131: my $now=time;
2132: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2133: $lonhost=~tr/A-Z/a-z/;
2134: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
2135: $dtoken=~s/\W/\_/g;
2136: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2137: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2138:
2139: unless (($tuname) && ($tudom)) {
2140: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2141: return '';
2142: }
2143:
2144: unless (&allowed('mgr',$tcrsid)) {
2145: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2146: $env{'user.name'}.' - '.$env{'user.domain'});
2147: return '';
2148: }
2149:
2150: my %infohash=('resource.0.intoken' => $token,
2151: 'resource.0.checkintime' => $now,
2152: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2153:
2154: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2155: return '';
2156: }
2157:
2158: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2159: &escape('Checkin - '.$token)) ne 'ok') {
2160: return '';
2161: }
2162:
2163: return ($symb,$tuname,$tudom,$tcrsid);
2164: }
2165:
2166: # --------------------------------------------- Set Expire Date for Spreadsheet
2167:
2168: sub expirespread {
2169: my ($uname,$udom,$stype,$usymb)=@_;
2170: my $cid=$env{'request.course.id'};
2171: if ($cid) {
2172: my $now=time;
2173: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2174: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2175: $env{'course.'.$cid.'.num'}.
2176: ':nohist_expirationdates:'.
2177: &escape($key).'='.$now,
2178: $env{'course.'.$cid.'.home'})
2179: }
2180: return 'ok';
2181: }
2182:
2183: # ----------------------------------------------------- Devalidate Spreadsheets
2184:
2185: sub devalidate {
2186: my ($symb,$uname,$udom)=@_;
2187: my $cid=$env{'request.course.id'};
2188: if ($cid) {
2189: # delete the stored spreadsheets for
2190: # - the student level sheet of this user in course's homespace
2191: # - the assessment level sheet for this resource
2192: # for this user in user's homespace
2193: # - current conditional state info
2194: my $key=$uname.':'.$udom.':';
2195: my $status=
2196: &del('nohist_calculatedsheets',
2197: [$key.'studentcalc:'],
2198: $env{'course.'.$cid.'.domain'},
2199: $env{'course.'.$cid.'.num'})
2200: .' '.
2201: &del('nohist_calculatedsheets_'.$cid,
2202: [$key.'assesscalc:'.$symb],$udom,$uname);
2203: unless ($status eq 'ok ok') {
2204: &logthis('Could not devalidate spreadsheet '.
2205: $uname.' at '.$udom.' for '.
2206: $symb.': '.$status);
2207: }
2208: &delenv('user.state.'.$cid);
2209: }
2210: }
2211:
2212: sub get_scalar {
2213: my ($string,$end) = @_;
2214: my $value;
2215: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2216: $value = $1;
2217: } elsif ($$string =~ s/^([^&]*?)&//) {
2218: $value = $1;
2219: }
2220: return &unescape($value);
2221: }
2222:
2223: sub array2str {
2224: my (@array) = @_;
2225: my $result=&arrayref2str(\@array);
2226: $result=~s/^__ARRAY_REF__//;
2227: $result=~s/__END_ARRAY_REF__$//;
2228: return $result;
2229: }
2230:
2231: sub arrayref2str {
2232: my ($arrayref) = @_;
2233: my $result='__ARRAY_REF__';
2234: foreach my $elem (@$arrayref) {
2235: if(ref($elem) eq 'ARRAY') {
2236: $result.=&arrayref2str($elem).'&';
2237: } elsif(ref($elem) eq 'HASH') {
2238: $result.=&hashref2str($elem).'&';
2239: } elsif(ref($elem)) {
2240: #print("Got a ref of ".(ref($elem))." skipping.");
2241: } else {
2242: $result.=&escape($elem).'&';
2243: }
2244: }
2245: $result=~s/\&$//;
2246: $result .= '__END_ARRAY_REF__';
2247: return $result;
2248: }
2249:
2250: sub hash2str {
2251: my (%hash) = @_;
2252: my $result=&hashref2str(\%hash);
2253: $result=~s/^__HASH_REF__//;
2254: $result=~s/__END_HASH_REF__$//;
2255: return $result;
2256: }
2257:
2258: sub hashref2str {
2259: my ($hashref)=@_;
2260: my $result='__HASH_REF__';
2261: foreach (sort(keys(%$hashref))) {
2262: if (ref($_) eq 'ARRAY') {
2263: $result.=&arrayref2str($_).'=';
2264: } elsif (ref($_) eq 'HASH') {
2265: $result.=&hashref2str($_).'=';
2266: } elsif (ref($_)) {
2267: $result.='=';
2268: #print("Got a ref of ".(ref($_))." skipping.");
2269: } else {
2270: if ($_) {$result.=&escape($_).'=';} else { last; }
2271: }
2272:
2273: if(ref($hashref->{$_}) eq 'ARRAY') {
2274: $result.=&arrayref2str($hashref->{$_}).'&';
2275: } elsif(ref($hashref->{$_}) eq 'HASH') {
2276: $result.=&hashref2str($hashref->{$_}).'&';
2277: } elsif(ref($hashref->{$_})) {
2278: $result.='&';
2279: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
2280: } else {
2281: $result.=&escape($hashref->{$_}).'&';
2282: }
2283: }
2284: $result=~s/\&$//;
2285: $result .= '__END_HASH_REF__';
2286: return $result;
2287: }
2288:
2289: sub str2hash {
2290: my ($string)=@_;
2291: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2292: return %$hash;
2293: }
2294:
2295: sub str2hashref {
2296: my ($string) = @_;
2297:
2298: my %hash;
2299:
2300: if($string !~ /^__HASH_REF__/) {
2301: if (! ($string eq '' || !defined($string))) {
2302: $hash{'error'}='Not hash reference';
2303: }
2304: return (\%hash, $string);
2305: }
2306:
2307: $string =~ s/^__HASH_REF__//;
2308:
2309: while($string !~ /^__END_HASH_REF__/) {
2310: #key
2311: my $key='';
2312: if($string =~ /^__HASH_REF__/) {
2313: ($key, $string)=&str2hashref($string);
2314: if(defined($key->{'error'})) {
2315: $hash{'error'}='Bad data';
2316: return (\%hash, $string);
2317: }
2318: } elsif($string =~ /^__ARRAY_REF__/) {
2319: ($key, $string)=&str2arrayref($string);
2320: if($key->[0] eq 'Array reference error') {
2321: $hash{'error'}='Bad data';
2322: return (\%hash, $string);
2323: }
2324: } else {
2325: $string =~ s/^(.*?)=//;
2326: $key=&unescape($1);
2327: }
2328: $string =~ s/^=//;
2329:
2330: #value
2331: my $value='';
2332: if($string =~ /^__HASH_REF__/) {
2333: ($value, $string)=&str2hashref($string);
2334: if(defined($value->{'error'})) {
2335: $hash{'error'}='Bad data';
2336: return (\%hash, $string);
2337: }
2338: } elsif($string =~ /^__ARRAY_REF__/) {
2339: ($value, $string)=&str2arrayref($string);
2340: if($value->[0] eq 'Array reference error') {
2341: $hash{'error'}='Bad data';
2342: return (\%hash, $string);
2343: }
2344: } else {
2345: $value=&get_scalar(\$string,'__END_HASH_REF__');
2346: }
2347: $string =~ s/^&//;
2348:
2349: $hash{$key}=$value;
2350: }
2351:
2352: $string =~ s/^__END_HASH_REF__//;
2353:
2354: return (\%hash, $string);
2355: }
2356:
2357: sub str2array {
2358: my ($string)=@_;
2359: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2360: return @$array;
2361: }
2362:
2363: sub str2arrayref {
2364: my ($string) = @_;
2365: my @array;
2366:
2367: if($string !~ /^__ARRAY_REF__/) {
2368: if (! ($string eq '' || !defined($string))) {
2369: $array[0]='Array reference error';
2370: }
2371: return (\@array, $string);
2372: }
2373:
2374: $string =~ s/^__ARRAY_REF__//;
2375:
2376: while($string !~ /^__END_ARRAY_REF__/) {
2377: my $value='';
2378: if($string =~ /^__HASH_REF__/) {
2379: ($value, $string)=&str2hashref($string);
2380: if(defined($value->{'error'})) {
2381: $array[0] ='Array reference error';
2382: return (\@array, $string);
2383: }
2384: } elsif($string =~ /^__ARRAY_REF__/) {
2385: ($value, $string)=&str2arrayref($string);
2386: if($value->[0] eq 'Array reference error') {
2387: $array[0] ='Array reference error';
2388: return (\@array, $string);
2389: }
2390: } else {
2391: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2392: }
2393: $string =~ s/^&//;
2394:
2395: push(@array, $value);
2396: }
2397:
2398: $string =~ s/^__END_ARRAY_REF__//;
2399:
2400: return (\@array, $string);
2401: }
2402:
2403: # -------------------------------------------------------------------Temp Store
2404:
2405: sub tmpreset {
2406: my ($symb,$namespace,$domain,$stuname) = @_;
2407: if (!$symb) {
2408: $symb=&symbread();
2409: if (!$symb) { $symb= $env{'request.url'}; }
2410: }
2411: $symb=escape($symb);
2412:
2413: if (!$namespace) { $namespace=$env{'request.state'}; }
2414: $namespace=~s/\//\_/g;
2415: $namespace=~s/\W//g;
2416:
2417: if (!$domain) { $domain=$env{'user.domain'}; }
2418: if (!$stuname) { $stuname=$env{'user.name'}; }
2419: if ($domain eq 'public' && $stuname eq 'public') {
2420: $stuname=$ENV{'REMOTE_ADDR'};
2421: }
2422: my $path=$perlvar{'lonDaemons'}.'/tmp';
2423: my %hash;
2424: if (tie(%hash,'GDBM_File',
2425: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2426: &GDBM_WRCREAT(),0640)) {
2427: foreach my $key (keys %hash) {
2428: if ($key=~ /:$symb/) {
2429: delete($hash{$key});
2430: }
2431: }
2432: }
2433: }
2434:
2435: sub tmpstore {
2436: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2437:
2438: if (!$symb) {
2439: $symb=&symbread();
2440: if (!$symb) { $symb= $env{'request.url'}; }
2441: }
2442: $symb=escape($symb);
2443:
2444: if (!$namespace) {
2445: # I don't think we would ever want to store this for a course.
2446: # it seems this will only be used if we don't have a course.
2447: #$namespace=$env{'request.course.id'};
2448: #if (!$namespace) {
2449: $namespace=$env{'request.state'};
2450: #}
2451: }
2452: $namespace=~s/\//\_/g;
2453: $namespace=~s/\W//g;
2454: if (!$domain) { $domain=$env{'user.domain'}; }
2455: if (!$stuname) { $stuname=$env{'user.name'}; }
2456: if ($domain eq 'public' && $stuname eq 'public') {
2457: $stuname=$ENV{'REMOTE_ADDR'};
2458: }
2459: my $now=time;
2460: my %hash;
2461: my $path=$perlvar{'lonDaemons'}.'/tmp';
2462: if (tie(%hash,'GDBM_File',
2463: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2464: &GDBM_WRCREAT(),0640)) {
2465: $hash{"version:$symb"}++;
2466: my $version=$hash{"version:$symb"};
2467: my $allkeys='';
2468: foreach my $key (keys(%$storehash)) {
2469: $allkeys.=$key.':';
2470: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2471: }
2472: $hash{"$version:$symb:timestamp"}=$now;
2473: $allkeys.='timestamp';
2474: $hash{"$version:keys:$symb"}=$allkeys;
2475: if (untie(%hash)) {
2476: return 'ok';
2477: } else {
2478: return "error:$!";
2479: }
2480: } else {
2481: return "error:$!";
2482: }
2483: }
2484:
2485: # -----------------------------------------------------------------Temp Restore
2486:
2487: sub tmprestore {
2488: my ($symb,$namespace,$domain,$stuname) = @_;
2489:
2490: if (!$symb) {
2491: $symb=&symbread();
2492: if (!$symb) { $symb= $env{'request.url'}; }
2493: }
2494: $symb=escape($symb);
2495:
2496: if (!$namespace) { $namespace=$env{'request.state'}; }
2497:
2498: if (!$domain) { $domain=$env{'user.domain'}; }
2499: if (!$stuname) { $stuname=$env{'user.name'}; }
2500: if ($domain eq 'public' && $stuname eq 'public') {
2501: $stuname=$ENV{'REMOTE_ADDR'};
2502: }
2503: my %returnhash;
2504: $namespace=~s/\//\_/g;
2505: $namespace=~s/\W//g;
2506: my %hash;
2507: my $path=$perlvar{'lonDaemons'}.'/tmp';
2508: if (tie(%hash,'GDBM_File',
2509: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2510: &GDBM_READER(),0640)) {
2511: my $version=$hash{"version:$symb"};
2512: $returnhash{'version'}=$version;
2513: my $scope;
2514: for ($scope=1;$scope<=$version;$scope++) {
2515: my $vkeys=$hash{"$scope:keys:$symb"};
2516: my @keys=split(/:/,$vkeys);
2517: my $key;
2518: $returnhash{"$scope:keys"}=$vkeys;
2519: foreach $key (@keys) {
2520: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2521: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2522: }
2523: }
2524: if (!(untie(%hash))) {
2525: return "error:$!";
2526: }
2527: } else {
2528: return "error:$!";
2529: }
2530: return %returnhash;
2531: }
2532:
2533: # ----------------------------------------------------------------------- Store
2534:
2535: sub store {
2536: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2537: my $home='';
2538:
2539: if ($stuname) { $home=&homeserver($stuname,$domain); }
2540:
2541: $symb=&symbclean($symb);
2542: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2543:
2544: if (!$domain) { $domain=$env{'user.domain'}; }
2545: if (!$stuname) { $stuname=$env{'user.name'}; }
2546:
2547: &devalidate($symb,$stuname,$domain);
2548:
2549: $symb=escape($symb);
2550: if (!$namespace) {
2551: unless ($namespace=$env{'request.course.id'}) {
2552: return '';
2553: }
2554: }
2555: if (!$home) { $home=$env{'user.home'}; }
2556:
2557: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2558: $$storehash{'host'}=$perlvar{'lonHostID'};
2559:
2560: my $namevalue='';
2561: foreach (keys %$storehash) {
2562: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2563: }
2564: $namevalue=~s/\&$//;
2565: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2566: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2567: }
2568:
2569: # -------------------------------------------------------------- Critical Store
2570:
2571: sub cstore {
2572: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2573: my $home='';
2574:
2575: if ($stuname) { $home=&homeserver($stuname,$domain); }
2576:
2577: $symb=&symbclean($symb);
2578: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2579:
2580: if (!$domain) { $domain=$env{'user.domain'}; }
2581: if (!$stuname) { $stuname=$env{'user.name'}; }
2582:
2583: &devalidate($symb,$stuname,$domain);
2584:
2585: $symb=escape($symb);
2586: if (!$namespace) {
2587: unless ($namespace=$env{'request.course.id'}) {
2588: return '';
2589: }
2590: }
2591: if (!$home) { $home=$env{'user.home'}; }
2592:
2593: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2594: $$storehash{'host'}=$perlvar{'lonHostID'};
2595:
2596: my $namevalue='';
2597: foreach (keys %$storehash) {
2598: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2599: }
2600: $namevalue=~s/\&$//;
2601: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2602: return critical
2603: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2604: }
2605:
2606: # --------------------------------------------------------------------- Restore
2607:
2608: sub restore {
2609: my ($symb,$namespace,$domain,$stuname) = @_;
2610: my $home='';
2611:
2612: if ($stuname) { $home=&homeserver($stuname,$domain); }
2613:
2614: if (!$symb) {
2615: unless ($symb=escape(&symbread())) { return ''; }
2616: } else {
2617: $symb=&escape(&symbclean($symb));
2618: }
2619: if (!$namespace) {
2620: unless ($namespace=$env{'request.course.id'}) {
2621: return '';
2622: }
2623: }
2624: if (!$domain) { $domain=$env{'user.domain'}; }
2625: if (!$stuname) { $stuname=$env{'user.name'}; }
2626: if (!$home) { $home=$env{'user.home'}; }
2627: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2628:
2629: my %returnhash=();
2630: foreach (split(/\&/,$answer)) {
2631: my ($name,$value)=split(/\=/,$_);
2632: $returnhash{&unescape($name)}=&thaw_unescape($value);
2633: }
2634: my $version;
2635: for ($version=1;$version<=$returnhash{'version'};$version++) {
2636: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2637: $returnhash{$_}=$returnhash{$version.':'.$_};
2638: }
2639: }
2640: return %returnhash;
2641: }
2642:
2643: # ---------------------------------------------------------- Course Description
2644:
2645: sub coursedescription {
2646: my ($courseid,$args)=@_;
2647: $courseid=~s/^\///;
2648: $courseid=~s/\_/\//g;
2649: my ($cdomain,$cnum)=split(/\//,$courseid);
2650: my $chome=&homeserver($cnum,$cdomain);
2651: my $normalid=$cdomain.'_'.$cnum;
2652: # need to always cache even if we get errors otherwise we keep
2653: # trying and trying and trying to get the course description.
2654: my %envhash=();
2655: my %returnhash=();
2656:
2657: my $expiretime=600;
2658: if ($env{'request.course.id'} eq $normalid) {
2659: $expiretime=120;
2660: }
2661:
2662: my $prefix='course.'.$cdomain.'_'.$cnum.'.';
2663: if (!$args->{'freshen_cache'}
2664: && ((time-$env{$prefix.'last_cache'}) < $expiretime) ) {
2665: foreach my $key (keys(%env)) {
2666: next if ($key !~ /^\Q$prefix\E(.*)/);
2667: my ($setting) = $1;
2668: $returnhash{$setting} = $env{$key};
2669: }
2670: return %returnhash;
2671: }
2672:
2673: # get the data agin
2674: if (!$args->{'one_time'}) {
2675: $envhash{'course.'.$normalid.'.last_cache'}=time;
2676: }
2677: if ($chome ne 'no_host') {
2678: %returnhash=&dump('environment',$cdomain,$cnum);
2679: if (!exists($returnhash{'con_lost'})) {
2680: $returnhash{'home'}= $chome;
2681: $returnhash{'domain'} = $cdomain;
2682: $returnhash{'num'} = $cnum;
2683: if (!defined($returnhash{'type'})) {
2684: $returnhash{'type'} = 'Course';
2685: }
2686: while (my ($name,$value) = each %returnhash) {
2687: $envhash{'course.'.$normalid.'.'.$name}=$value;
2688: }
2689: $returnhash{'url'}=&clutter($returnhash{'url'});
2690: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2691: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2692: $envhash{'course.'.$normalid.'.home'}=$chome;
2693: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2694: $envhash{'course.'.$normalid.'.num'}=$cnum;
2695: }
2696: }
2697: if (!$args->{'one_time'}) {
2698: &appenv(%envhash);
2699: }
2700: return %returnhash;
2701: }
2702:
2703: # -------------------------------------------------See if a user is privileged
2704:
2705: sub privileged {
2706: my ($username,$domain)=@_;
2707: my $rolesdump=&reply("dump:$domain:$username:roles",
2708: &homeserver($username,$domain));
2709: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2710: my $now=time;
2711: if ($rolesdump ne '') {
2712: foreach (split(/&/,$rolesdump)) {
2713: if ($_!~/^rolesdef_/) {
2714: my ($area,$role)=split(/=/,$_);
2715: $area=~s/\_\w\w$//;
2716: my ($trole,$tend,$tstart)=split(/_/,$role);
2717: if (($trole eq 'dc') || ($trole eq 'su')) {
2718: my $active=1;
2719: if ($tend) {
2720: if ($tend<$now) { $active=0; }
2721: }
2722: if ($tstart) {
2723: if ($tstart>$now) { $active=0; }
2724: }
2725: if ($active) { return 1; }
2726: }
2727: }
2728: }
2729: }
2730: return 0;
2731: }
2732:
2733: # -------------------------------------------------------- Get user privileges
2734:
2735: sub rolesinit {
2736: my ($domain,$username,$authhost)=@_;
2737: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2738: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2739: my %allroles=();
2740: my %allgroups=();
2741: my $now=time;
2742: my %userroles = ('user.login.time' => $now);
2743: my $group_privs;
2744:
2745: if ($rolesdump ne '') {
2746: foreach (split(/&/,$rolesdump)) {
2747: if ($_!~/^rolesdef_/) {
2748: my ($area,$role)=split(/=/,$_);
2749: $area=~s/\_\w\w$//;
2750: my ($trole,$tend,$tstart,$group_privs);
2751: if ($role=~/^cr/) {
2752: if ($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|) {
2753: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2754: ($tend,$tstart)=split('_',$trest);
2755: } else {
2756: $trole=$role;
2757: }
2758: } elsif ($role =~ m|^gr/|) {
2759: ($trole,$tend,$tstart) = split(/_/,$role);
2760: ($trole,$group_privs) = split(/\//,$trole);
2761: $group_privs = &unescape($group_privs);
2762: } else {
2763: ($trole,$tend,$tstart)=split(/_/,$role);
2764: }
2765: my %new_role = &set_arearole($trole,$area,$tstart,$tend,$domain,
2766: $username);
2767: @userroles{keys(%new_role)} = @new_role{keys(%new_role)};
2768: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2769: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2770: if (($area ne '') && ($trole ne '')) {
2771: my $spec=$trole.'.'.$area;
2772: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2773: if ($trole =~ /^cr\//) {
2774: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2775: } elsif ($trole eq 'gr') {
2776: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
2777: } else {
2778: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2779: }
2780: }
2781: }
2782: }
2783: my ($author,$adv) = &set_userprivs(\%userroles,\%allroles,\%allgroups);
2784: $userroles{'user.adv'} = $adv;
2785: $userroles{'user.author'} = $author;
2786: $env{'user.adv'}=$adv;
2787: }
2788: return \%userroles;
2789: }
2790:
2791: sub set_arearole {
2792: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2793: # log the associated role with the area
2794: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2795: return ('user.role.'.$trole.'.'.$area => $tstart.'.'.$tend);
2796: }
2797:
2798: sub custom_roleprivs {
2799: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2800: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2801: my $homsvr=homeserver($rauthor,$rdomain);
2802: if ($hostname{$homsvr} ne '') {
2803: my ($rdummy,$roledef)=
2804: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2805: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2806: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2807: if (defined($syspriv)) {
2808: $$allroles{'cm./'}.=':'.$syspriv;
2809: $$allroles{$spec.'./'}.=':'.$syspriv;
2810: }
2811: if ($tdomain ne '') {
2812: if (defined($dompriv)) {
2813: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2814: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2815: }
2816: if (($trest ne '') && (defined($coursepriv))) {
2817: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2818: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2819: }
2820: }
2821: }
2822: }
2823: }
2824:
2825: sub group_roleprivs {
2826: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
2827: my $access = 1;
2828: my $now = time;
2829: if (($tend!=0) && ($tend<$now)) { $access = 0; }
2830: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
2831: if ($access) {
2832: my ($course,$group) = ($area =~ m|(/\w+/\w+)/([^/]+)$|);
2833: $$allgroups{$course}{$group} .=':'.$group_privs;
2834: }
2835: }
2836:
2837: sub standard_roleprivs {
2838: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2839: if (defined($pr{$trole.':s'})) {
2840: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2841: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2842: }
2843: if ($tdomain ne '') {
2844: if (defined($pr{$trole.':d'})) {
2845: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2846: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2847: }
2848: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2849: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2850: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2851: }
2852: }
2853: }
2854:
2855: sub set_userprivs {
2856: my ($userroles,$allroles,$allgroups) = @_;
2857: my $author=0;
2858: my $adv=0;
2859: my %grouproles = ();
2860: if (keys(%{$allgroups}) > 0) {
2861: foreach my $role (keys %{$allroles}) {
2862: my ($trole,$area,$sec,$extendedarea);
2863: if ($role =~ m-^(\w+|cr/\w+/\w+/\w+)\.(/\w+/\w+)(/?\w*)-) {
2864: $trole = $1;
2865: $area = $2;
2866: $sec = $3;
2867: $extendedarea = $area.$sec;
2868: if (exists($$allgroups{$area})) {
2869: foreach my $group (keys(%{$$allgroups{$area}})) {
2870: my $spec = $trole.'.'.$extendedarea;
2871: $grouproles{$spec.'.'.$area.'/'.$group} =
2872: $$allgroups{$area}{$group};
2873: }
2874: }
2875: }
2876: }
2877: }
2878: foreach (keys(%grouproles)) {
2879: $$allroles{$_} = $grouproles{$_};
2880: }
2881: foreach (keys %{$allroles}) {
2882: my %thesepriv=();
2883: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2884: foreach (split(/:/,$$allroles{$_})) {
2885: if ($_ ne '') {
2886: my ($privilege,$restrictions)=split(/&/,$_);
2887: if ($restrictions eq '') {
2888: $thesepriv{$privilege}='F';
2889: } elsif ($thesepriv{$privilege} ne 'F') {
2890: $thesepriv{$privilege}.=$restrictions;
2891: }
2892: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2893: }
2894: }
2895: my $thesestr='';
2896: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2897: $userroles->{'user.priv.'.$_} = $thesestr;
2898: }
2899: return ($author,$adv);
2900: }
2901:
2902: # --------------------------------------------------------------- get interface
2903:
2904: sub get {
2905: my ($namespace,$storearr,$udomain,$uname)=@_;
2906: my $items='';
2907: foreach (@$storearr) {
2908: $items.=escape($_).'&';
2909: }
2910: $items=~s/\&$//;
2911: if (!$udomain) { $udomain=$env{'user.domain'}; }
2912: if (!$uname) { $uname=$env{'user.name'}; }
2913: my $uhome=&homeserver($uname,$udomain);
2914:
2915: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2916: my @pairs=split(/\&/,$rep);
2917: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2918: return @pairs;
2919: }
2920: my %returnhash=();
2921: my $i=0;
2922: foreach (@$storearr) {
2923: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2924: $i++;
2925: }
2926: return %returnhash;
2927: }
2928:
2929: # --------------------------------------------------------------- del interface
2930:
2931: sub del {
2932: my ($namespace,$storearr,$udomain,$uname)=@_;
2933: my $items='';
2934: foreach (@$storearr) {
2935: $items.=escape($_).'&';
2936: }
2937: $items=~s/\&$//;
2938: if (!$udomain) { $udomain=$env{'user.domain'}; }
2939: if (!$uname) { $uname=$env{'user.name'}; }
2940: my $uhome=&homeserver($uname,$udomain);
2941:
2942: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2943: }
2944:
2945: # -------------------------------------------------------------- dump interface
2946:
2947: sub dump {
2948: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2949: if (!$udomain) { $udomain=$env{'user.domain'}; }
2950: if (!$uname) { $uname=$env{'user.name'}; }
2951: my $uhome=&homeserver($uname,$udomain);
2952: if ($regexp) {
2953: $regexp=&escape($regexp);
2954: } else {
2955: $regexp='.';
2956: }
2957: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
2958: my @pairs=split(/\&/,$rep);
2959: my %returnhash=();
2960: foreach my $item (@pairs) {
2961: my ($key,$value)=split(/=/,$item,2);
2962: $key = &unescape($key);
2963: next if ($key =~ /^error: 2 /);
2964: $returnhash{$key}=&thaw_unescape($value);
2965: }
2966: return %returnhash;
2967: }
2968:
2969: # --------------------------------------------------------- dumpstore interface
2970:
2971: sub dumpstore {
2972: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2973: return &dump($namespace,$udomain,$uname,$regexp,$range);
2974: }
2975:
2976: # -------------------------------------------------------------- keys interface
2977:
2978: sub getkeys {
2979: my ($namespace,$udomain,$uname)=@_;
2980: if (!$udomain) { $udomain=$env{'user.domain'}; }
2981: if (!$uname) { $uname=$env{'user.name'}; }
2982: my $uhome=&homeserver($uname,$udomain);
2983: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2984: my @keyarray=();
2985: foreach (split(/\&/,$rep)) {
2986: push (@keyarray,&unescape($_));
2987: }
2988: return @keyarray;
2989: }
2990:
2991: # --------------------------------------------------------------- currentdump
2992: sub currentdump {
2993: my ($courseid,$sdom,$sname)=@_;
2994: $courseid = $env{'request.course.id'} if (! defined($courseid));
2995: $sdom = $env{'user.domain'} if (! defined($sdom));
2996: $sname = $env{'user.name'} if (! defined($sname));
2997: my $uhome = &homeserver($sname,$sdom);
2998: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2999: return if ($rep =~ /^(error:|no_such_host)/);
3000: #
3001: my %returnhash=();
3002: #
3003: if ($rep eq "unknown_cmd") {
3004: # an old lond will not know currentdump
3005: # Do a dump and make it look like a currentdump
3006: my @tmp = &dump($courseid,$sdom,$sname,'.');
3007: return if ($tmp[0] =~ /^(error:|no_such_host)/);
3008: my %hash = @tmp;
3009: @tmp=();
3010: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
3011: } else {
3012: my @pairs=split(/\&/,$rep);
3013: foreach (@pairs) {
3014: my ($key,$value)=split(/=/,$_);
3015: my ($symb,$param) = split(/:/,$key);
3016: $returnhash{&unescape($symb)}->{&unescape($param)} =
3017: &thaw_unescape($value);
3018: }
3019: }
3020: return %returnhash;
3021: }
3022:
3023: sub convert_dump_to_currentdump{
3024: my %hash = %{shift()};
3025: my %returnhash;
3026: # Code ripped from lond, essentially. The only difference
3027: # here is the unescaping done by lonnet::dump(). Conceivably
3028: # we might run in to problems with parameter names =~ /^v\./
3029: while (my ($key,$value) = each(%hash)) {
3030: my ($v,$symb,$param) = split(/:/,$key);
3031: next if ($v eq 'version' || $symb eq 'keys');
3032: next if (exists($returnhash{$symb}) &&
3033: exists($returnhash{$symb}->{$param}) &&
3034: $returnhash{$symb}->{'v.'.$param} > $v);
3035: $returnhash{$symb}->{$param}=$value;
3036: $returnhash{$symb}->{'v.'.$param}=$v;
3037: }
3038: #
3039: # Remove all of the keys in the hashes which keep track of
3040: # the version of the parameter.
3041: while (my ($symb,$param_hash) = each(%returnhash)) {
3042: # use a foreach because we are going to delete from the hash.
3043: foreach my $key (keys(%$param_hash)) {
3044: delete($param_hash->{$key}) if ($key =~ /^v\./);
3045: }
3046: }
3047: return \%returnhash;
3048: }
3049:
3050: # ------------------------------------------------------ critical inc interface
3051:
3052: sub cinc {
3053: return &inc(@_,'critical');
3054: }
3055:
3056: # --------------------------------------------------------------- inc interface
3057:
3058: sub inc {
3059: my ($namespace,$store,$udomain,$uname,$critical) = @_;
3060: if (!$udomain) { $udomain=$env{'user.domain'}; }
3061: if (!$uname) { $uname=$env{'user.name'}; }
3062: my $uhome=&homeserver($uname,$udomain);
3063: my $items='';
3064: if (! ref($store)) {
3065: # got a single value, so use that instead
3066: $items = &escape($store).'=&';
3067: } elsif (ref($store) eq 'SCALAR') {
3068: $items = &escape($$store).'=&';
3069: } elsif (ref($store) eq 'ARRAY') {
3070: $items = join('=&',map {&escape($_);} @{$store});
3071: } elsif (ref($store) eq 'HASH') {
3072: while (my($key,$value) = each(%{$store})) {
3073: $items.= &escape($key).'='.&escape($value).'&';
3074: }
3075: }
3076: $items=~s/\&$//;
3077: if ($critical) {
3078: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
3079: } else {
3080: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
3081: }
3082: }
3083:
3084: # --------------------------------------------------------------- put interface
3085:
3086: sub put {
3087: my ($namespace,$storehash,$udomain,$uname)=@_;
3088: if (!$udomain) { $udomain=$env{'user.domain'}; }
3089: if (!$uname) { $uname=$env{'user.name'}; }
3090: my $uhome=&homeserver($uname,$udomain);
3091: my $items='';
3092: foreach (keys %$storehash) {
3093: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3094: }
3095: $items=~s/\&$//;
3096: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3097: }
3098:
3099: # ------------------------------------------------------------ newput interface
3100:
3101: sub newput {
3102: my ($namespace,$storehash,$udomain,$uname)=@_;
3103: if (!$udomain) { $udomain=$env{'user.domain'}; }
3104: if (!$uname) { $uname=$env{'user.name'}; }
3105: my $uhome=&homeserver($uname,$udomain);
3106: my $items='';
3107: foreach my $key (keys(%$storehash)) {
3108: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3109: }
3110: $items=~s/\&$//;
3111: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
3112: }
3113:
3114: # --------------------------------------------------------- putstore interface
3115:
3116: sub putstore {
3117: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3118: if (!$udomain) { $udomain=$env{'user.domain'}; }
3119: if (!$uname) { $uname=$env{'user.name'}; }
3120: my $uhome=&homeserver($uname,$udomain);
3121: my $items='';
3122: foreach my $key (keys(%$storehash)) {
3123: $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
3124: }
3125: $items=~s/\&$//;
3126: my $esc_symb=&escape($symb);
3127: my $esc_v=&escape($version);
3128: my $reply =
3129: &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
3130: $uhome);
3131: if ($reply eq 'unknown_cmd') {
3132: # gfall back to way things use to be done
3133: return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
3134: $uname);
3135: }
3136: return $reply;
3137: }
3138:
3139: sub old_putstore {
3140: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3141: if (!$udomain) { $udomain=$env{'user.domain'}; }
3142: if (!$uname) { $uname=$env{'user.name'}; }
3143: my $uhome=&homeserver($uname,$udomain);
3144: my %newstorehash;
3145: foreach (keys %$storehash) {
3146: my $key = $version.':'.&escape($symb).':'.$_;
3147: $newstorehash{$key} = $storehash->{$_};
3148: }
3149: my $items='';
3150: my %allitems = ();
3151: foreach (keys %newstorehash) {
3152: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
3153: my $key = $1.':keys:'.$2;
3154: $allitems{$key} .= $3.':';
3155: }
3156: $items.=$_.'='.&freeze_escape($newstorehash{$_}).'&';
3157: }
3158: foreach (keys %allitems) {
3159: $allitems{$_} =~ s/\:$//;
3160: $items.= $_.'='.$allitems{$_}.'&';
3161: }
3162: $items=~s/\&$//;
3163: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3164: }
3165:
3166: # ------------------------------------------------------ critical put interface
3167:
3168: sub cput {
3169: my ($namespace,$storehash,$udomain,$uname)=@_;
3170: if (!$udomain) { $udomain=$env{'user.domain'}; }
3171: if (!$uname) { $uname=$env{'user.name'}; }
3172: my $uhome=&homeserver($uname,$udomain);
3173: my $items='';
3174: foreach (keys %$storehash) {
3175: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3176: }
3177: $items=~s/\&$//;
3178: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
3179: }
3180:
3181: # -------------------------------------------------------------- eget interface
3182:
3183: sub eget {
3184: my ($namespace,$storearr,$udomain,$uname)=@_;
3185: my $items='';
3186: foreach (@$storearr) {
3187: $items.=escape($_).'&';
3188: }
3189: $items=~s/\&$//;
3190: if (!$udomain) { $udomain=$env{'user.domain'}; }
3191: if (!$uname) { $uname=$env{'user.name'}; }
3192: my $uhome=&homeserver($uname,$udomain);
3193: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3194: my @pairs=split(/\&/,$rep);
3195: my %returnhash=();
3196: my $i=0;
3197: foreach (@$storearr) {
3198: $returnhash{$_}=&thaw_unescape($pairs[$i]);
3199: $i++;
3200: }
3201: return %returnhash;
3202: }
3203:
3204: # ------------------------------------------------------------ tmpput interface
3205: sub tmpput {
3206: my ($storehash,$server)=@_;
3207: my $items='';
3208: foreach (keys(%$storehash)) {
3209: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3210: }
3211: $items=~s/\&$//;
3212: return &reply("tmpput:$items",$server);
3213: }
3214:
3215: # ------------------------------------------------------------ tmpget interface
3216: sub tmpget {
3217: my ($token,$server)=@_;
3218: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3219: my $rep=&reply("tmpget:$token",$server);
3220: my %returnhash;
3221: foreach my $item (split(/\&/,$rep)) {
3222: my ($key,$value)=split(/=/,$item);
3223: $returnhash{&unescape($key)}=&thaw_unescape($value);
3224: }
3225: return %returnhash;
3226: }
3227:
3228: # ------------------------------------------------------------ tmpget interface
3229: sub tmpdel {
3230: my ($token,$server)=@_;
3231: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3232: return &reply("tmpdel:$token",$server);
3233: }
3234:
3235: # -------------------------------------------------- portfolio access checking
3236:
3237: sub portfolio_access {
3238: my ($requrl) = @_;
3239: my (undef,$udom,$unum,$file_name,$group) = &parse_portfolio_url($requrl);
3240: my $result = &get_portfolio_access($udom,$unum,$file_name,$group);
3241: if ($result eq 'ok') {
3242: return 'F';
3243: } elsif ($result =~ /^[^:]+:guest_/) {
3244: return 'A';
3245: }
3246: return '';
3247: }
3248:
3249: sub get_portfolio_access {
3250: my ($udom,$unum,$file_name,$group,$access_hash) = @_;
3251:
3252: if (!ref($access_hash)) {
3253: my $current_perms = &get_portfile_permissions($udom,$unum);
3254: my %access_controls = &get_access_controls($current_perms,$group,
3255: $file_name);
3256: $access_hash = $access_controls{$file_name};
3257: }
3258:
3259: my ($public,$guest,@domains,@users,@courses,@groups);
3260: my $now = time;
3261: if (ref($access_hash) eq 'HASH') {
3262: foreach my $key (keys(%{$access_hash})) {
3263: my ($num,$scope,$end,$start) = ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
3264: if ($start > $now) {
3265: next;
3266: }
3267: if ($end && $end<$now) {
3268: next;
3269: }
3270: if ($scope eq 'public') {
3271: $public = $key;
3272: last;
3273: } elsif ($scope eq 'guest') {
3274: $guest = $key;
3275: } elsif ($scope eq 'domains') {
3276: push(@domains,$key);
3277: } elsif ($scope eq 'users') {
3278: push(@users,$key);
3279: } elsif ($scope eq 'course') {
3280: push(@courses,$key);
3281: } elsif ($scope eq 'group') {
3282: push(@groups,$key);
3283: }
3284: }
3285: if ($public) {
3286: return 'ok';
3287: }
3288: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3289: if ($guest) {
3290: return $guest;
3291: }
3292: } else {
3293: if (@domains > 0) {
3294: foreach my $domkey (@domains) {
3295: if (ref($access_hash->{$domkey}{'dom'}) eq 'ARRAY') {
3296: if (grep(/^\Q$env{'user.domain'}\E$/,@{$access_hash->{$domkey}{'dom'}})) {
3297: return 'ok';
3298: }
3299: }
3300: }
3301: }
3302: if (@users > 0) {
3303: foreach my $userkey (@users) {
3304: if (exists($access_hash->{$userkey}{'users'}{$env{'user.name'}.':'.$env{'user.domain'}})) {
3305: return 'ok';
3306: }
3307: }
3308: }
3309: my %roleshash;
3310: my @courses_and_groups = @courses;
3311: push(@courses_and_groups,@groups);
3312: if (@courses_and_groups > 0) {
3313: my (%allgroups,%allroles);
3314: my ($start,$end,$role,$sec,$group);
3315: foreach my $envkey (%env) {
3316: if ($envkey =~ m-^user\.role\.(gr|cc|in|ta|ep|st)\./([^/]+)/([^/]+)/?([^/]*)$-) {
3317: my $cid = $2.'_'.$3;
3318: if ($1 eq 'gr') {
3319: $group = $4;
3320: $allgroups{$cid}{$group} = $env{$envkey};
3321: } else {
3322: if ($4 eq '') {
3323: $sec = 'none';
3324: } else {
3325: $sec = $4;
3326: }
3327: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3328: }
3329: } elsif ($envkey =~ m-^user\.role\./cr/(\w+/\w+/\w*)./([^/]+)/([^/]+)/?([^/]*)$-) {
3330: my $cid = $2.'_'.$3;
3331: if ($4 eq '') {
3332: $sec = 'none';
3333: } else {
3334: $sec = $4;
3335: }
3336: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3337: }
3338: }
3339: if (keys(%allroles) == 0) {
3340: return;
3341: }
3342: foreach my $key (@courses_and_groups) {
3343: my %content = %{$$access_hash{$key}};
3344: my $cnum = $content{'number'};
3345: my $cdom = $content{'domain'};
3346: my $cid = $cdom.'_'.$cnum;
3347: if (!exists($allroles{$cid})) {
3348: next;
3349: }
3350: foreach my $role_id (keys(%{$content{'roles'}})) {
3351: my @sections = @{$content{'roles'}{$role_id}{'section'}};
3352: my @groups = @{$content{'roles'}{$role_id}{'group'}};
3353: my @status = @{$content{'roles'}{$role_id}{'access'}};
3354: my @roles = @{$content{'roles'}{$role_id}{'role'}};
3355: foreach my $role (keys(%{$allroles{$cid}})) {
3356: if ((grep/^all$/,@roles) || (grep/^\Q$role\E$/,@roles)) {
3357: foreach my $sec (keys(%{$allroles{$cid}{$role}})) {
3358: if (&course_group_datechecker($allroles{$cid}{$role}{$sec},$now,\@status) eq 'ok') {
3359: if (grep/^all$/,@sections) {
3360: return 'ok';
3361: } else {
3362: if (grep/^$sec$/,@sections) {
3363: return 'ok';
3364: }
3365: }
3366: }
3367: }
3368: if (keys(%{$allgroups{$cid}}) == 0) {
3369: if (grep/^none$/,@groups) {
3370: return 'ok';
3371: }
3372: } else {
3373: if (grep/^all$/,@groups) {
3374: return 'ok';
3375: }
3376: foreach my $group (keys(%{$allgroups{$cid}})) {
3377: if (grep/^$group$/,@groups) {
3378: return 'ok';
3379: }
3380: }
3381: }
3382: }
3383: }
3384: }
3385: }
3386: }
3387: if ($guest) {
3388: return $guest;
3389: }
3390: }
3391: }
3392: return;
3393: }
3394:
3395: sub course_group_datechecker {
3396: my ($dates,$now,$status) = @_;
3397: my ($start,$end) = split(/\./,$dates);
3398: if (!$start && !$end) {
3399: return 'ok';
3400: }
3401: if (grep/^active$/,@{$status}) {
3402: if (((!$start) || ($start && $start <= $now)) && ((!$end) || ($end && $end >= $now))) {
3403: return 'ok';
3404: }
3405: }
3406: if (grep/^previous$/,@{$status}) {
3407: if ($end > $now ) {
3408: return 'ok';
3409: }
3410: }
3411: if (grep/^future$/,@{$status}) {
3412: if ($start > $now) {
3413: return 'ok';
3414: }
3415: }
3416: return;
3417: }
3418:
3419: sub parse_portfolio_url {
3420: my ($url) = @_;
3421:
3422: my ($type,$udom,$unum,$group,$file_name);
3423:
3424: if ($url =~ m-^/*uploaded/([^/]+)/([^/]+)/portfolio(/.+)$-) {
3425: $type = 1;
3426: $udom = $1;
3427: $unum = $2;
3428: $file_name = $3;
3429: } elsif ($url =~ m-^/*uploaded/([^/]+)/([^/]+)/groups/([^/]+)/portfolio/(.+)$-) {
3430: $type = 2;
3431: $udom = $1;
3432: $unum = $2;
3433: $group = $3;
3434: $file_name = $3.'/'.$4;
3435: }
3436: if (wantarray) {
3437: return ($type,$udom,$unum,$file_name,$group);
3438: }
3439: return $type;
3440: }
3441:
3442: sub is_portfolio_url {
3443: my ($url) = @_;
3444: return scalar(&parse_portfolio_url($url));
3445: }
3446:
3447: # ---------------------------------------------- Custom access rule evaluation
3448:
3449: sub customaccess {
3450: my ($priv,$uri)=@_;
3451: my ($urole,$urealm)=split(/\./,$env{'request.role'});
3452: $urealm=~s/^\W//;
3453: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
3454: my $access=0;
3455: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
3456: my ($effect,$realm,$role)=split(/\:/,$_);
3457: if ($role) {
3458: if ($role ne $urole) { next; }
3459: }
3460: foreach (split(/\s*\,\s*/,$realm)) {
3461: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
3462: if ($tdom) {
3463: if ($tdom ne $udom) { next; }
3464: }
3465: if ($tcrs) {
3466: if ($tcrs ne $ucrs) { next; }
3467: }
3468: if ($tsec) {
3469: if ($tsec ne $usec) { next; }
3470: }
3471: $access=($effect eq 'allow');
3472: last;
3473: }
3474: if ($realm eq '' && $role eq '') {
3475: $access=($effect eq 'allow');
3476: }
3477: }
3478: return $access;
3479: }
3480:
3481: # ------------------------------------------------- Check for a user privilege
3482:
3483: sub allowed {
3484: my ($priv,$uri,$symb)=@_;
3485: my $ver_orguri=$uri;
3486: $uri=&deversion($uri);
3487: my $orguri=$uri;
3488: $uri=&declutter($uri);
3489:
3490: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3491: # Free bre access to adm and meta resources
3492: if (((($uri=~/^adm\//) && ($uri !~ m{/(?:smppg|bulletinboard)$}))
3493: || (($uri=~/\.meta$/) && ($uri!~m|^uploaded/|) ))
3494: && ($priv eq 'bre')) {
3495: return 'F';
3496: }
3497:
3498: # Free bre access to user's own portfolio contents
3499: my ($space,$domain,$name,@dir)=split('/',$uri);
3500: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3501: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
3502: return 'F';
3503: }
3504:
3505: # bre access to group portfolio for rgf priv in group, or mdg or vcg in course.
3506: if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
3507: && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
3508: if (exists($env{'request.course.id'})) {
3509: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
3510: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
3511: if (($domain eq $cdom) && ($name eq $cnum)) {
3512: my $courseprivid=$env{'request.course.id'};
3513: $courseprivid=~s/\_/\//;
3514: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
3515: .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
3516: return $1;
3517: } else {
3518: if ($env{'request.course.sec'}) {
3519: $courseprivid.='/'.$env{'request.course.sec'};
3520: }
3521: if ($env{'user.priv.'.$env{'request.role'}.'./'.
3522: $courseprivid} =~/(mdg|vcg)\&([^\:]*)/) {
3523: return $2;
3524: }
3525: }
3526: }
3527: }
3528: }
3529:
3530: # Free bre to public access
3531:
3532: if ($priv eq 'bre') {
3533: my $copyright=&metadata($uri,'copyright');
3534: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3535: return 'F';
3536: }
3537: if ($copyright eq 'priv') {
3538: $uri=~/([^\/]+)\/([^\/]+)\//;
3539: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3540: return '';
3541: }
3542: }
3543: if ($copyright eq 'domain') {
3544: $uri=~/([^\/]+)\/([^\/]+)\//;
3545: unless (($env{'user.domain'} eq $1) ||
3546: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3547: return '';
3548: }
3549: }
3550: if ($env{'request.role'}=~ /li\.\//) {
3551: # Library role, so allow browsing of resources in this domain.
3552: return 'F';
3553: }
3554: if ($copyright eq 'custom') {
3555: unless (&customaccess($priv,$uri)) { return ''; }
3556: }
3557: }
3558: # Domain coordinator is trying to create a course
3559: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3560: # uri is the requested domain in this case.
3561: # comparison to 'request.role.domain' shows if the user has selected
3562: # a role of dc for the domain in question.
3563: return 'F' if ($uri eq $env{'request.role.domain'});
3564: }
3565:
3566: my $thisallowed='';
3567: my $statecond=0;
3568: my $courseprivid='';
3569:
3570: # Course
3571:
3572: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3573: $thisallowed.=$1;
3574: }
3575:
3576: # Domain
3577:
3578: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3579: =~/\Q$priv\E\&([^\:]*)/) {
3580: $thisallowed.=$1;
3581: }
3582:
3583: # Course: uri itself is a course
3584: my $courseuri=$uri;
3585: $courseuri=~s/\_(\d)/\/$1/;
3586: $courseuri=~s/^([^\/])/\/$1/;
3587:
3588: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3589: =~/\Q$priv\E\&([^\:]*)/) {
3590: $thisallowed.=$1;
3591: }
3592:
3593: # URI is an uploaded document for this course, default permissions don't matter
3594: # not allowing 'edit' access (editupload) to uploaded course docs
3595: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3596: $thisallowed='';
3597: my ($match)=&is_on_map($uri);
3598: if ($match) {
3599: if ($env{'user.priv.'.$env{'request.role'}.'./'}
3600: =~/\Q$priv\E\&([^\:]*)/) {
3601: $thisallowed.=$1;
3602: }
3603: } else {
3604: my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
3605: if ($refuri) {
3606: if ($refuri =~ m|^/adm/|) {
3607: $thisallowed='F';
3608: } else {
3609: $refuri=&declutter($refuri);
3610: my ($match) = &is_on_map($refuri);
3611: if ($match) {
3612: $thisallowed='F';
3613: }
3614: }
3615: }
3616: }
3617: }
3618:
3619: if ($priv eq 'bre'
3620: && $thisallowed ne 'F'
3621: && $thisallowed ne '2'
3622: && &is_portfolio_url($uri)) {
3623: $thisallowed = &portfolio_access($uri);
3624: }
3625:
3626: # Full access at system, domain or course-wide level? Exit.
3627:
3628: if ($thisallowed=~/F/) {
3629: return 'F';
3630: }
3631:
3632: # If this is generating or modifying users, exit with special codes
3633:
3634: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3635: if (($priv eq 'cca') || ($priv eq 'caa')) {
3636: my ($audom,$auname)=split('/',$uri);
3637: # no author name given, so this just checks on the general right to make a co-author in this domain
3638: unless ($auname) { return $thisallowed; }
3639: # an author name is given, so we are about to actually make a co-author for a certain account
3640: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3641: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3642: ($audom ne $env{'request.role.domain'}))) { return ''; }
3643: }
3644: return $thisallowed;
3645: }
3646: #
3647: # Gathered so far: system, domain and course wide privileges
3648: #
3649: # Course: See if uri or referer is an individual resource that is part of
3650: # the course
3651:
3652: if ($env{'request.course.id'}) {
3653:
3654: $courseprivid=$env{'request.course.id'};
3655: if ($env{'request.course.sec'}) {
3656: $courseprivid.='/'.$env{'request.course.sec'};
3657: }
3658: $courseprivid=~s/\_/\//;
3659: my $checkreferer=1;
3660: my ($match,$cond)=&is_on_map($uri);
3661: if ($match) {
3662: $statecond=$cond;
3663: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3664: =~/\Q$priv\E\&([^\:]*)/) {
3665: $thisallowed.=$1;
3666: $checkreferer=0;
3667: }
3668: }
3669:
3670: if ($checkreferer) {
3671: my $refuri=$env{'httpref.'.$orguri};
3672: unless ($refuri) {
3673: foreach (keys %env) {
3674: if ($_=~/^httpref\..*\*/) {
3675: my $pattern=$_;
3676: $pattern=~s/^httpref\.\/res\///;
3677: $pattern=~s/\*/\[\^\/\]\+/g;
3678: $pattern=~s/\//\\\//g;
3679: if ($orguri=~/$pattern/) {
3680: $refuri=$env{$_};
3681: }
3682: }
3683: }
3684: }
3685:
3686: if ($refuri) {
3687: $refuri=&declutter($refuri);
3688: my ($match,$cond)=&is_on_map($refuri);
3689: if ($match) {
3690: my $refstatecond=$cond;
3691: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3692: =~/\Q$priv\E\&([^\:]*)/) {
3693: $thisallowed.=$1;
3694: $uri=$refuri;
3695: $statecond=$refstatecond;
3696: }
3697: }
3698: }
3699: }
3700: }
3701:
3702: #
3703: # Gathered now: all privileges that could apply, and condition number
3704: #
3705: #
3706: # Full or no access?
3707: #
3708:
3709: if ($thisallowed=~/F/) {
3710: return 'F';
3711: }
3712:
3713: unless ($thisallowed) {
3714: return '';
3715: }
3716:
3717: # Restrictions exist, deal with them
3718: #
3719: # C:according to course preferences
3720: # R:according to resource settings
3721: # L:unless locked
3722: # X:according to user session state
3723: #
3724:
3725: # Possibly locked functionality, check all courses
3726: # Locks might take effect only after 10 minutes cache expiration for other
3727: # courses, and 2 minutes for current course
3728:
3729: my $envkey;
3730: if ($thisallowed=~/L/) {
3731: foreach $envkey (keys %env) {
3732: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3733: my $courseid=$2;
3734: my $roleid=$1.'.'.$2;
3735: $courseid=~s/^\///;
3736: my $expiretime=600;
3737: if ($env{'request.role'} eq $roleid) {
3738: $expiretime=120;
3739: }
3740: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3741: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3742: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3743: &coursedescription($courseid,{'freshen_cache' => 1});
3744: }
3745: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3746: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3747: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3748: &log($env{'user.domain'},$env{'user.name'},
3749: $env{'user.home'},
3750: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3751: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3752: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3753: return '';
3754: }
3755: }
3756: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3757: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3758: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3759: &log($env{'user.domain'},$env{'user.name'},
3760: $env{'user.home'},
3761: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3762: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3763: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3764: return '';
3765: }
3766: }
3767: }
3768: }
3769: }
3770:
3771: #
3772: # Rest of the restrictions depend on selected course
3773: #
3774:
3775: unless ($env{'request.course.id'}) {
3776: if ($thisallowed eq 'A') {
3777: return 'A';
3778: } else {
3779: return '1';
3780: }
3781: }
3782:
3783: #
3784: # Now user is definitely in a course
3785: #
3786:
3787:
3788: # Course preferences
3789:
3790: if ($thisallowed=~/C/) {
3791: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3792: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
3793: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
3794: =~/\Q$rolecode\E/) {
3795: if ($priv ne 'pch') {
3796: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3797: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3798: $env{'request.course.id'});
3799: }
3800: return '';
3801: }
3802:
3803: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
3804: =~/\Q$unamedom\E/) {
3805: if ($priv ne 'pch') {
3806: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
3807: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3808: $env{'request.course.id'});
3809: }
3810: return '';
3811: }
3812: }
3813:
3814: # Resource preferences
3815:
3816: if ($thisallowed=~/R/) {
3817: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3818: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3819: if ($priv ne 'pch') {
3820: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3821: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3822: }
3823: return '';
3824: }
3825: }
3826:
3827: # Restricted by state or randomout?
3828:
3829: if ($thisallowed=~/X/) {
3830: if ($env{'acc.randomout'}) {
3831: if (!$symb) { $symb=&symbread($uri,1); }
3832: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3833: return '';
3834: }
3835: }
3836: if (&condval($statecond)) {
3837: return '2';
3838: } else {
3839: return '';
3840: }
3841: }
3842:
3843: if ($thisallowed eq 'A') {
3844: return 'A';
3845: }
3846: return 'F';
3847: }
3848:
3849: sub split_uri_for_cond {
3850: my $uri=&deversion(&declutter(shift));
3851: my @uriparts=split(/\//,$uri);
3852: my $filename=pop(@uriparts);
3853: my $pathname=join('/',@uriparts);
3854: return ($pathname,$filename);
3855: }
3856: # --------------------------------------------------- Is a resource on the map?
3857:
3858: sub is_on_map {
3859: my ($pathname,$filename) = &split_uri_for_cond(shift);
3860: #Trying to find the conditional for the file
3861: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3862: /\&\Q$filename\E\:([\d\|]+)\&/);
3863: if ($match) {
3864: return (1,$1);
3865: } else {
3866: return (0,0);
3867: }
3868: }
3869:
3870: # --------------------------------------------------------- Get symb from alias
3871:
3872: sub get_symb_from_alias {
3873: my $symb=shift;
3874: my ($map,$resid,$url)=&decode_symb($symb);
3875: # Already is a symb
3876: if ($url) { return $symb; }
3877: # Must be an alias
3878: my $aliassymb='';
3879: my %bighash;
3880: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
3881: &GDBM_READER(),0640)) {
3882: my $rid=$bighash{'mapalias_'.$symb};
3883: if ($rid) {
3884: my ($mapid,$resid)=split(/\./,$rid);
3885: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3886: $resid,$bighash{'src_'.$rid});
3887: }
3888: untie %bighash;
3889: }
3890: return $aliassymb;
3891: }
3892:
3893: # ----------------------------------------------------------------- Define Role
3894:
3895: sub definerole {
3896: if (allowed('mcr','/')) {
3897: my ($rolename,$sysrole,$domrole,$courole)=@_;
3898: foreach (split(':',$sysrole)) {
3899: my ($crole,$cqual)=split(/\&/,$_);
3900: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3901: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3902: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3903: return "refused:s:$crole&$cqual";
3904: }
3905: }
3906: }
3907: foreach (split(':',$domrole)) {
3908: my ($crole,$cqual)=split(/\&/,$_);
3909: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3910: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3911: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3912: return "refused:d:$crole&$cqual";
3913: }
3914: }
3915: }
3916: foreach (split(':',$courole)) {
3917: my ($crole,$cqual)=split(/\&/,$_);
3918: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3919: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3920: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3921: return "refused:c:$crole&$cqual";
3922: }
3923: }
3924: }
3925: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3926: "$env{'user.domain'}:$env{'user.name'}:".
3927: "rolesdef_$rolename=".
3928: escape($sysrole.'_'.$domrole.'_'.$courole);
3929: return reply($command,$env{'user.home'});
3930: } else {
3931: return 'refused';
3932: }
3933: }
3934:
3935: # ---------------- Make a metadata query against the network of library servers
3936:
3937: sub metadata_query {
3938: my ($query,$custom,$customshow,$server_array)=@_;
3939: my %rhash;
3940: my @server_list = (defined($server_array) ? @$server_array
3941: : keys(%libserv) );
3942: for my $server (@server_list) {
3943: unless ($custom or $customshow) {
3944: my $reply=&reply("querysend:".&escape($query),$server);
3945: $rhash{$server}=$reply;
3946: }
3947: else {
3948: my $reply=&reply("querysend:".&escape($query).':'.
3949: &escape($custom).':'.&escape($customshow),
3950: $server);
3951: $rhash{$server}=$reply;
3952: }
3953: }
3954: return \%rhash;
3955: }
3956:
3957: # ----------------------------------------- Send log queries and wait for reply
3958:
3959: sub log_query {
3960: my ($uname,$udom,$query,%filters)=@_;
3961: my $uhome=&homeserver($uname,$udom);
3962: if ($uhome eq 'no_host') { return 'error: no_host'; }
3963: my $uhost=$hostname{$uhome};
3964: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3965: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3966: $uhome);
3967: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3968: return get_query_reply($queryid);
3969: }
3970:
3971: # ------- Request retrieval of institutional classlists for course(s)
3972:
3973: sub fetch_enrollment_query {
3974: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3975: my $homeserver;
3976: my $maxtries = 1;
3977: if ($context eq 'automated') {
3978: $homeserver = $perlvar{'lonHostID'};
3979: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3980: } else {
3981: $homeserver = &homeserver($cnum,$dom);
3982: }
3983: my $host=$hostname{$homeserver};
3984: my $cmd = '';
3985: foreach (keys %{$affiliatesref}) {
3986: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3987: }
3988: $cmd =~ s/%%$//;
3989: $cmd = &escape($cmd);
3990: my $query = 'fetchenrollment';
3991: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
3992: unless ($queryid=~/^\Q$host\E\_/) {
3993: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3994: return 'error: '.$queryid;
3995: }
3996: my $reply = &get_query_reply($queryid);
3997: my $tries = 1;
3998: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3999: $reply = &get_query_reply($queryid);
4000: $tries ++;
4001: }
4002: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4003: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4004: } else {
4005: my @responses = split/:/,$reply;
4006: if ($homeserver eq $perlvar{'lonHostID'}) {
4007: foreach (@responses) {
4008: my ($key,$value) = split/=/,$_;
4009: $$replyref{$key} = $value;
4010: }
4011: } else {
4012: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
4013: foreach (@responses) {
4014: my ($key,$value) = split/=/,$_;
4015: $$replyref{$key} = $value;
4016: if ($value > 0) {
4017: foreach (@{$$affiliatesref{$key}}) {
4018: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
4019: my $destname = $pathname.'/'.$filename;
4020: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
4021: if ($xml_classlist =~ /^error/) {
4022: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
4023: } else {
4024: if ( open(FILE,">$destname") ) {
4025: print FILE &unescape($xml_classlist);
4026: close(FILE);
4027: } else {
4028: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
4029: }
4030: }
4031: }
4032: }
4033: }
4034: }
4035: return 'ok';
4036: }
4037: return 'error';
4038: }
4039:
4040: sub get_query_reply {
4041: my $queryid=shift;
4042: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
4043: my $reply='';
4044: for (1..100) {
4045: sleep 2;
4046: if (-e $replyfile.'.end') {
4047: if (open(my $fh,$replyfile)) {
4048: $reply.=<$fh>;
4049: close($fh);
4050: } else { return 'error: reply_file_error'; }
4051: return &unescape($reply);
4052: }
4053: }
4054: return 'timeout:'.$queryid;
4055: }
4056:
4057: sub courselog_query {
4058: #
4059: # possible filters:
4060: # url: url or symb
4061: # username
4062: # domain
4063: # action: view, submit, grade
4064: # start: timestamp
4065: # end: timestamp
4066: #
4067: my (%filters)=@_;
4068: unless ($env{'request.course.id'}) { return 'no_course'; }
4069: if ($filters{'url'}) {
4070: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
4071: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
4072: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
4073: }
4074: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
4075: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
4076: return &log_query($cname,$cdom,'courselog',%filters);
4077: }
4078:
4079: sub userlog_query {
4080: my ($uname,$udom,%filters)=@_;
4081: return &log_query($uname,$udom,'userlog',%filters);
4082: }
4083:
4084: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
4085:
4086: sub auto_run {
4087: my ($cnum,$cdom) = @_;
4088: my $homeserver = &homeserver($cnum,$cdom);
4089: my $response = &reply('autorun:'.$cdom,$homeserver);
4090: return $response;
4091: }
4092:
4093: sub auto_get_sections {
4094: my ($cnum,$cdom,$inst_coursecode) = @_;
4095: my $homeserver = &homeserver($cnum,$cdom);
4096: my @secs = ();
4097: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
4098: unless ($response eq 'refused') {
4099: @secs = split/:/,$response;
4100: }
4101: return @secs;
4102: }
4103:
4104: sub auto_new_course {
4105: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
4106: my $homeserver = &homeserver($cnum,$cdom);
4107: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
4108: return $response;
4109: }
4110:
4111: sub auto_validate_courseID {
4112: my ($cnum,$cdom,$inst_course_id) = @_;
4113: my $homeserver = &homeserver($cnum,$cdom);
4114: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
4115: return $response;
4116: }
4117:
4118: sub auto_create_password {
4119: my ($cnum,$cdom,$authparam) = @_;
4120: my $homeserver = &homeserver($cnum,$cdom);
4121: my $create_passwd = 0;
4122: my $authchk = '';
4123: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
4124: if ($response eq 'refused') {
4125: $authchk = 'refused';
4126: } else {
4127: ($authparam,$create_passwd,$authchk) = split/:/,$response;
4128: }
4129: return ($authparam,$create_passwd,$authchk);
4130: }
4131:
4132: sub auto_photo_permission {
4133: my ($cnum,$cdom,$students) = @_;
4134: my $homeserver = &homeserver($cnum,$cdom);
4135: my ($outcome,$perm_reqd,$conditions) =
4136: split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
4137: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4138: return (undef,undef);
4139: }
4140: return ($outcome,$perm_reqd,$conditions);
4141: }
4142:
4143: sub auto_checkphotos {
4144: my ($uname,$udom,$pid) = @_;
4145: my $homeserver = &homeserver($uname,$udom);
4146: my ($result,$resulttype);
4147: my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
4148: &escape($uname).':'.&escape($pid),
4149: $homeserver));
4150: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4151: return (undef,undef);
4152: }
4153: if ($outcome) {
4154: ($result,$resulttype) = split(/:/,$outcome);
4155: }
4156: return ($result,$resulttype);
4157: }
4158:
4159: sub auto_photochoice {
4160: my ($cnum,$cdom) = @_;
4161: my $homeserver = &homeserver($cnum,$cdom);
4162: my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
4163: &escape($cdom),
4164: $homeserver)));
4165: if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4166: return (undef,undef);
4167: }
4168: return ($update,$comment);
4169: }
4170:
4171: sub auto_photoupdate {
4172: my ($affiliatesref,$dom,$cnum,$photo) = @_;
4173: my $homeserver = &homeserver($cnum,$dom);
4174: my $host=$hostname{$homeserver};
4175: my $cmd = '';
4176: my $maxtries = 1;
4177: foreach (keys %{$affiliatesref}) {
4178: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
4179: }
4180: $cmd =~ s/%%$//;
4181: $cmd = &escape($cmd);
4182: my $query = 'institutionalphotos';
4183: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
4184: unless ($queryid=~/^\Q$host\E\_/) {
4185: &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
4186: return 'error: '.$queryid;
4187: }
4188: my $reply = &get_query_reply($queryid);
4189: my $tries = 1;
4190: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4191: $reply = &get_query_reply($queryid);
4192: $tries ++;
4193: }
4194: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4195: &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4196: } else {
4197: my @responses = split(/:/,$reply);
4198: my $outcome = shift(@responses);
4199: foreach my $item (@responses) {
4200: my ($key,$value) = split(/=/,$item);
4201: $$photo{$key} = $value;
4202: }
4203: return $outcome;
4204: }
4205: return 'error';
4206: }
4207:
4208: sub auto_instcode_format {
4209: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,
4210: $cat_order) = @_;
4211: my $courses = '';
4212: my @homeservers;
4213: if ($caller eq 'global') {
4214: foreach my $tryserver (keys(%libserv)) {
4215: if ($hostdom{$tryserver} eq $codedom) {
4216: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4217: push(@homeservers,$tryserver);
4218: }
4219: }
4220: }
4221: } else {
4222: push(@homeservers,&homeserver($caller,$codedom));
4223: }
4224: foreach my $code (keys(%{$instcodes})) {
4225: $courses .= &escape($code).'='.&escape($$instcodes{$code}).'&';
4226: }
4227: chop($courses);
4228: my $ok_response = 0;
4229: my $response;
4230: while (@homeservers > 0 && $ok_response == 0) {
4231: my $server = shift(@homeservers);
4232: $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$server);
4233: if ($response !~ /(con_lost|error|no_such_host|refused)/) {
4234: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) =
4235: split/:/,$response;
4236: %{$codes} = (%{$codes},&str2hash($codes_str));
4237: push(@{$codetitles},&str2array($codetitles_str));
4238: %{$cat_titles} = (%{$cat_titles},&str2hash($cat_titles_str));
4239: %{$cat_order} = (%{$cat_order},&str2hash($cat_order_str));
4240: $ok_response = 1;
4241: }
4242: }
4243: if ($ok_response) {
4244: return 'ok';
4245: } else {
4246: return $response;
4247: }
4248: }
4249:
4250: sub auto_instcode_defaults {
4251: my ($domain,$returnhash,$code_order) = @_;
4252: my @homeservers;
4253: foreach my $tryserver (keys(%libserv)) {
4254: if ($hostdom{$tryserver} eq $domain) {
4255: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4256: push(@homeservers,$tryserver);
4257: }
4258: }
4259: }
4260: my $ok_response = 0;
4261: my $response;
4262: while (@homeservers > 0 && $ok_response == 0) {
4263: my $server = shift(@homeservers);
4264: $response=&reply('autoinstcodedefaults:'.$domain,$server);
4265: if ($response !~ /(con_lost|error|no_such_host|refused)/) {
4266: foreach my $pair (split(/\&/,$response)) {
4267: my ($name,$value)=split(/\=/,$pair);
4268: if ($name eq 'code_order') {
4269: $code_order = [split(/\&/,&unescape($value))];
4270: } else {
4271: $$returnhash{&unescape($name)}=&unescape($value);
4272: }
4273: }
4274: }
4275: $ok_response = 1;
4276: }
4277: if ($ok_response) {
4278: return 'ok';
4279: } else {
4280: return $response;
4281: }
4282: }
4283:
4284: sub auto_validate_class_sec {
4285: my ($cdom,$cnum,$owner,$inst_class) = @_;
4286: my $homeserver = &homeserver($cnum,$cdom);
4287: my $response=&reply('autovalidateclass_sec:'.$inst_class.':'.
4288: &escape($owner).':'.$cdom,$homeserver);
4289: return $response;
4290: }
4291:
4292: # ------------------------------------------------------- Course Group routines
4293:
4294: sub get_coursegroups {
4295: my ($cdom,$cnum,$group) = @_;
4296: return(&dump('coursegroups',$cdom,$cnum,$group));
4297: }
4298:
4299: sub modify_coursegroup {
4300: my ($cdom,$cnum,$groupsettings) = @_;
4301: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
4302: }
4303:
4304: sub modify_group_roles {
4305: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
4306: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
4307: my $role = 'gr/'.&escape($userprivs);
4308: my ($uname,$udom) = split(/:/,$user);
4309: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
4310: if ($result eq 'ok') {
4311: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
4312: }
4313: return $result;
4314: }
4315:
4316: sub modify_coursegroup_membership {
4317: my ($cdom,$cnum,$membership) = @_;
4318: my $result = &put('groupmembership',$membership,$cdom,$cnum);
4319: return $result;
4320: }
4321:
4322: sub get_active_groups {
4323: my ($udom,$uname,$cdom,$cnum) = @_;
4324: my $now = time;
4325: my %groups = ();
4326: foreach my $key (keys(%env)) {
4327: if ($key =~ m-user\.role\.gr\./([^/]+)/([^/]+)/(\w+)$-) {
4328: my ($start,$end) = split(/\./,$env{$key});
4329: if (($end!=0) && ($end<$now)) { next; }
4330: if (($start!=0) && ($start>$now)) { next; }
4331: if ($1 eq $cdom && $2 eq $cnum) {
4332: $groups{$3} = $env{$key} ;
4333: }
4334: }
4335: }
4336: return %groups;
4337: }
4338:
4339: sub get_group_membership {
4340: my ($cdom,$cnum,$group) = @_;
4341: return(&dump('groupmembership',$cdom,$cnum,$group));
4342: }
4343:
4344: sub get_users_groups {
4345: my ($udom,$uname,$courseid) = @_;
4346: my @usersgroups;
4347: my $cachetime=1800;
4348: $courseid=~s/\_/\//g;
4349: $courseid=~s/^(\w)/\/$1/;
4350:
4351: my $hashid="$udom:$uname:$courseid";
4352: my ($grouplist,$cached)=&is_cached_new('getgroups',$hashid);
4353: if (defined($cached)) {
4354: @usersgroups = split(/:/,$grouplist);
4355: } else {
4356: $grouplist = '';
4357: my %roleshash = &dump('roles',$udom,$uname,$courseid);
4358: my ($tmp) = keys(%roleshash);
4359: if ($tmp=~/^error:/) {
4360: &logthis('Error retrieving roles: '.$tmp.' for '.$uname.':'.$udom);
4361: } else {
4362: my $access_end = $env{'course.'.$courseid.
4363: '.default_enrollment_end_date'};
4364: my $now = time;
4365: foreach my $key (keys(%roleshash)) {
4366: if ($key =~ /^\Q$courseid\E\/(\w+)\_gr$/) {
4367: my $group = $1;
4368: if ($roleshash{$key} =~ /_(\d+)_(\d+)$/) {
4369: my $start = $2;
4370: my $end = $1;
4371: if ($start == -1) { next; } # deleted from group
4372: if (($start!=0) && ($start>$now)) { next; }
4373: if (($end!=0) && ($end<$now)) {
4374: if ($access_end && $access_end < $now) {
4375: if ($access_end - $end < 86400) {
4376: push(@usersgroups,$group);
4377: }
4378: }
4379: next;
4380: }
4381: push(@usersgroups,$group);
4382: }
4383: }
4384: }
4385: @usersgroups = &sort_course_groups($courseid,@usersgroups);
4386: $grouplist = join(':',@usersgroups);
4387: &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
4388: }
4389: }
4390: return @usersgroups;
4391: }
4392:
4393: sub devalidate_getgroups_cache {
4394: my ($udom,$uname,$cdom,$cnum)=@_;
4395: my $courseid = $cdom.'_'.$cnum;
4396: $courseid=~s/\_/\//g;
4397: $courseid=~s/^(\w)/\/$1/;
4398: my $hashid="$udom:$uname:$courseid";
4399: &devalidate_cache_new('getgroups',$hashid);
4400: }
4401:
4402: # ------------------------------------------------------------------ Plain Text
4403:
4404: sub plaintext {
4405: my ($short,$type,$cid) = @_;
4406: if ($short =~ /^cr/) {
4407: return (split('/',$short))[-1];
4408: }
4409: if (!defined($cid)) {
4410: $cid = $env{'request.course.id'};
4411: }
4412: if (defined($cid) && defined($env{'course.'.$cid.'.'.$short.'.plaintext'})) {
4413: return &Apache::lonlocal::mt($env{'course.'.$cid.'.'.$short.
4414: '.plaintext'});
4415: }
4416: my %rolenames = (
4417: Course => 'std',
4418: Group => 'alt1',
4419: );
4420: if (defined($type) &&
4421: defined($rolenames{$type}) &&
4422: defined($prp{$short}{$rolenames{$type}})) {
4423: return &Apache::lonlocal::mt($prp{$short}{$rolenames{$type}});
4424: } else {
4425: return &Apache::lonlocal::mt($prp{$short}{'std'});
4426: }
4427: }
4428:
4429: # ----------------------------------------------------------------- Assign Role
4430:
4431: sub assignrole {
4432: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
4433: my $mrole;
4434: if ($role =~ /^cr\//) {
4435: my $cwosec=$url;
4436: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4437: unless (&allowed('ccr',$cwosec)) {
4438: &logthis('Refused custom assignrole: '.
4439: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4440: $env{'user.name'}.' at '.$env{'user.domain'});
4441: return 'refused';
4442: }
4443: $mrole='cr';
4444: } elsif ($role =~ /^gr\//) {
4445: my $cwogrp=$url;
4446: $cwogrp=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4447: unless (&allowed('mdg',$cwogrp)) {
4448: &logthis('Refused group assignrole: '.
4449: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4450: $env{'user.name'}.' at '.$env{'user.domain'});
4451: return 'refused';
4452: }
4453: $mrole='gr';
4454: } else {
4455: my $cwosec=$url;
4456: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4457: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
4458: &logthis('Refused assignrole: '.
4459: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4460: $env{'user.name'}.' at '.$env{'user.domain'});
4461: return 'refused';
4462: }
4463: $mrole=$role;
4464: }
4465: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4466: "$udom:$uname:$url".'_'."$mrole=$role";
4467: if ($end) { $command.='_'.$end; }
4468: if ($start) {
4469: if ($end) {
4470: $command.='_'.$start;
4471: } else {
4472: $command.='_0_'.$start;
4473: }
4474: }
4475: my $origstart = $start;
4476: my $origend = $end;
4477: # actually delete
4478: if ($deleteflag) {
4479: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
4480: # modify command to delete the role
4481: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
4482: "$udom:$uname:$url".'_'."$mrole";
4483: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
4484: # set start and finish to negative values for userrolelog
4485: $start=-1;
4486: $end=-1;
4487: }
4488: }
4489: # send command
4490: my $answer=&reply($command,&homeserver($uname,$udom));
4491: # log new user role if status is ok
4492: if ($answer eq 'ok') {
4493: &userrolelog($role,$uname,$udom,$url,$start,$end);
4494: # for course roles, perform group memberships changes triggered by role change.
4495: unless ($role =~ /^gr/) {
4496: &Apache::longroup::group_changes($udom,$uname,$url,$role,$origend,
4497: $origstart);
4498: }
4499: }
4500: return $answer;
4501: }
4502:
4503: # -------------------------------------------------- Modify user authentication
4504: # Overrides without validation
4505:
4506: sub modifyuserauth {
4507: my ($udom,$uname,$umode,$upass)=@_;
4508: my $uhome=&homeserver($uname,$udom);
4509: unless (&allowed('mau',$udom)) { return 'refused'; }
4510: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
4511: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4512: ' in domain '.$env{'request.role.domain'});
4513: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
4514: &escape($upass),$uhome);
4515: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
4516: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
4517: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4518: &log($udom,,$uname,$uhome,
4519: 'Authentication changed by '.$env{'user.domain'}.', '.
4520: $env{'user.name'}.', '.$umode.
4521: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4522: unless ($reply eq 'ok') {
4523: &logthis('Authentication mode error: '.$reply);
4524: return 'error: '.$reply;
4525: }
4526: return 'ok';
4527: }
4528:
4529: # --------------------------------------------------------------- Modify a user
4530:
4531: sub modifyuser {
4532: my ($udom, $uname, $uid,
4533: $umode, $upass, $first,
4534: $middle, $last, $gene,
4535: $forceid, $desiredhome, $email)=@_;
4536: $udom=~s/\W//g;
4537: $uname=~s/\W//g;
4538: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
4539: $umode.', '.$first.', '.$middle.', '.
4540: $last.', '.$gene.'(forceid: '.$forceid.')'.
4541: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
4542: ' desiredhome not specified').
4543: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4544: ' in domain '.$env{'request.role.domain'});
4545: my $uhome=&homeserver($uname,$udom,'true');
4546: # ----------------------------------------------------------------- Create User
4547: if (($uhome eq 'no_host') &&
4548: (($umode && $upass) || ($umode eq 'localauth'))) {
4549: my $unhome='';
4550: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
4551: $unhome = $desiredhome;
4552: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
4553: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
4554: } else { # load balancing routine for determining $unhome
4555: my $tryserver;
4556: my $loadm=10000000;
4557: foreach $tryserver (keys %libserv) {
4558: if ($hostdom{$tryserver} eq $udom) {
4559: my $answer=reply('load',$tryserver);
4560: if (($answer=~/\d+/) && ($answer<$loadm)) {
4561: $loadm=$answer;
4562: $unhome=$tryserver;
4563: }
4564: }
4565: }
4566: }
4567: if (($unhome eq '') || ($unhome eq 'no_host')) {
4568: return 'error: unable to find a home server for '.$uname.
4569: ' in domain '.$udom;
4570: }
4571: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
4572: &escape($upass),$unhome);
4573: unless ($reply eq 'ok') {
4574: return 'error: '.$reply;
4575: }
4576: $uhome=&homeserver($uname,$udom,'true');
4577: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
4578: return 'error: unable verify users home machine.';
4579: }
4580: } # End of creation of new user
4581: # ---------------------------------------------------------------------- Add ID
4582: if ($uid) {
4583: $uid=~tr/A-Z/a-z/;
4584: my %uidhash=&idrget($udom,$uname);
4585: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
4586: && (!$forceid)) {
4587: unless ($uid eq $uidhash{$uname}) {
4588: return 'error: user id "'.$uid.'" does not match '.
4589: 'current user id "'.$uidhash{$uname}.'".';
4590: }
4591: } else {
4592: &idput($udom,($uname => $uid));
4593: }
4594: }
4595: # -------------------------------------------------------------- Add names, etc
4596: my @tmp=&get('environment',
4597: ['firstname','middlename','lastname','generation'],
4598: $udom,$uname);
4599: my %names;
4600: if ($tmp[0] =~ m/^error:.*/) {
4601: %names=();
4602: } else {
4603: %names = @tmp;
4604: }
4605: #
4606: # Make sure to not trash student environment if instructor does not bother
4607: # to supply name and email information
4608: #
4609: if ($first) { $names{'firstname'} = $first; }
4610: if (defined($middle)) { $names{'middlename'} = $middle; }
4611: if ($last) { $names{'lastname'} = $last; }
4612: if (defined($gene)) { $names{'generation'} = $gene; }
4613: if ($email) {
4614: $email=~s/[^\w\@\.\-\,]//gs;
4615: if ($email=~/\@/) { $names{'notification'} = $email;
4616: $names{'critnotification'} = $email;
4617: $names{'permanentemail'} = $email; }
4618: }
4619: my $reply = &put('environment', \%names, $udom,$uname);
4620: if ($reply ne 'ok') { return 'error: '.$reply; }
4621: &devalidate_cache_new('namescache',$uname.':'.$udom);
4622: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
4623: $umode.', '.$first.', '.$middle.', '.
4624: $last.', '.$gene.' by '.
4625: $env{'user.name'}.' at '.$env{'user.domain'});
4626: return 'ok';
4627: }
4628:
4629: # -------------------------------------------------------------- Modify student
4630:
4631: sub modifystudent {
4632: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
4633: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
4634: if (!$cid) {
4635: unless ($cid=$env{'request.course.id'}) {
4636: return 'not_in_class';
4637: }
4638: }
4639: # --------------------------------------------------------------- Make the user
4640: my $reply=&modifyuser
4641: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
4642: $desiredhome,$email);
4643: unless ($reply eq 'ok') { return $reply; }
4644: # This will cause &modify_student_enrollment to get the uid from the
4645: # students environment
4646: $uid = undef if (!$forceid);
4647: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
4648: $gene,$usec,$end,$start,$type,$locktype,$cid);
4649: return $reply;
4650: }
4651:
4652: sub modify_student_enrollment {
4653: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
4654: my ($cdom,$cnum,$chome);
4655: if (!$cid) {
4656: unless ($cid=$env{'request.course.id'}) {
4657: return 'not_in_class';
4658: }
4659: $cdom=$env{'course.'.$cid.'.domain'};
4660: $cnum=$env{'course.'.$cid.'.num'};
4661: } else {
4662: ($cdom,$cnum)=split(/_/,$cid);
4663: }
4664: $chome=$env{'course.'.$cid.'.home'};
4665: if (!$chome) {
4666: $chome=&homeserver($cnum,$cdom);
4667: }
4668: if (!$chome) { return 'unknown_course'; }
4669: # Make sure the user exists
4670: my $uhome=&homeserver($uname,$udom);
4671: if (($uhome eq '') || ($uhome eq 'no_host')) {
4672: return 'error: no such user';
4673: }
4674: # Get student data if we were not given enough information
4675: if (!defined($first) || $first eq '' ||
4676: !defined($last) || $last eq '' ||
4677: !defined($uid) || $uid eq '' ||
4678: !defined($middle) || $middle eq '' ||
4679: !defined($gene) || $gene eq '') {
4680: # They did not supply us with enough data to enroll the student, so
4681: # we need to pick up more information.
4682: my %tmp = &get('environment',
4683: ['firstname','middlename','lastname', 'generation','id']
4684: ,$udom,$uname);
4685:
4686: #foreach (keys(%tmp)) {
4687: # &logthis("key $_ = ".$tmp{$_});
4688: #}
4689: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
4690: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
4691: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
4692: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
4693: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
4694: }
4695: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
4696: my $reply=cput('classlist',
4697: {"$uname:$udom" =>
4698: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
4699: $cdom,$cnum);
4700: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
4701: return 'error: '.$reply;
4702: } else {
4703: &devalidate_getsection_cache($udom,$uname,$cid);
4704: }
4705: # Add student role to user
4706: my $uurl='/'.$cid;
4707: $uurl=~s/\_/\//g;
4708: if ($usec) {
4709: $uurl.='/'.$usec;
4710: }
4711: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
4712: }
4713:
4714: sub format_name {
4715: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
4716: my $name;
4717: if ($first ne 'lastname') {
4718: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
4719: } else {
4720: if ($lastname=~/\S/) {
4721: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
4722: $name=~s/\s+,/,/;
4723: } else {
4724: $name.= $firstname.' '.$middlename.' '.$generation;
4725: }
4726: }
4727: $name=~s/^\s+//;
4728: $name=~s/\s+$//;
4729: $name=~s/\s+/ /g;
4730: return $name;
4731: }
4732:
4733: # ------------------------------------------------- Write to course preferences
4734:
4735: sub writecoursepref {
4736: my ($courseid,%prefs)=@_;
4737: $courseid=~s/^\///;
4738: $courseid=~s/\_/\//g;
4739: my ($cdomain,$cnum)=split(/\//,$courseid);
4740: my $chome=homeserver($cnum,$cdomain);
4741: if (($chome eq '') || ($chome eq 'no_host')) {
4742: return 'error: no such course';
4743: }
4744: my $cstring='';
4745: foreach (keys %prefs) {
4746: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
4747: }
4748: $cstring=~s/\&$//;
4749: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
4750: }
4751:
4752: # ---------------------------------------------------------- Make/modify course
4753:
4754: sub createcourse {
4755: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,
4756: $course_owner,$crstype)=@_;
4757: $url=&declutter($url);
4758: my $cid='';
4759: unless (&allowed('ccc',$udom)) {
4760: return 'refused';
4761: }
4762: # ------------------------------------------------------------------- Create ID
4763: my $uname=int(1+rand(9)).
4764: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
4765: substr($$.time,0,5).unpack("H8",pack("I32",time)).
4766: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4767: # ----------------------------------------------- Make sure that does not exist
4768: my $uhome=&homeserver($uname,$udom,'true');
4769: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4770: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
4771: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4772: $uhome=&homeserver($uname,$udom,'true');
4773: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4774: return 'error: unable to generate unique course-ID';
4775: }
4776: }
4777: # ------------------------------------------------ Check supplied server name
4778: $course_server = $env{'user.homeserver'} if (! defined($course_server));
4779: if (! exists($libserv{$course_server})) {
4780: return 'error:bad server name '.$course_server;
4781: }
4782: # ------------------------------------------------------------- Make the course
4783: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
4784: $course_server);
4785: unless ($reply eq 'ok') { return 'error: '.$reply; }
4786: $uhome=&homeserver($uname,$udom,'true');
4787: if (($uhome eq '') || ($uhome eq 'no_host')) {
4788: return 'error: no such course';
4789: }
4790: # ----------------------------------------------------------------- Course made
4791: # log existence
4792: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
4793: ':'.&escape($inst_code).':'.&escape($course_owner).':'.
4794: &escape($crstype),$uhome);
4795: &flushcourselogs();
4796: # set toplevel url
4797: my $topurl=$url;
4798: unless ($nonstandard) {
4799: # ------------------------------------------ For standard courses, make top url
4800: my $mapurl=&clutter($url);
4801: if ($mapurl eq '/res/') { $mapurl=''; }
4802: $env{'form.initmap'}=(<<ENDINITMAP);
4803: <map>
4804: <resource id="1" type="start"></resource>
4805: <resource id="2" src="$mapurl"></resource>
4806: <resource id="3" type="finish"></resource>
4807: <link index="1" from="1" to="2"></link>
4808: <link index="2" from="2" to="3"></link>
4809: </map>
4810: ENDINITMAP
4811: $topurl=&declutter(
4812: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
4813: );
4814: }
4815: # ----------------------------------------------------------- Write preferences
4816: &writecoursepref($udom.'_'.$uname,
4817: ('description' => $description,
4818: 'url' => $topurl));
4819: return '/'.$udom.'/'.$uname;
4820: }
4821:
4822: # ---------------------------------------------------------- Assign Custom Role
4823:
4824: sub assigncustomrole {
4825: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
4826: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
4827: $end,$start,$deleteflag);
4828: }
4829:
4830: # ----------------------------------------------------------------- Revoke Role
4831:
4832: sub revokerole {
4833: my ($udom,$uname,$url,$role,$deleteflag)=@_;
4834: my $now=time;
4835: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
4836: }
4837:
4838: # ---------------------------------------------------------- Revoke Custom Role
4839:
4840: sub revokecustomrole {
4841: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
4842: my $now=time;
4843: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
4844: $deleteflag);
4845: }
4846:
4847: # ------------------------------------------------------------ Disk usage
4848: sub diskusage {
4849: my ($udom,$uname,$directoryRoot)=@_;
4850: $directoryRoot =~ s/\/$//;
4851: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
4852: return $listing;
4853: }
4854:
4855: sub is_locked {
4856: my ($file_name, $domain, $user) = @_;
4857: my @check;
4858: my $is_locked;
4859: push @check, $file_name;
4860: my %locked = &get('file_permissions',\@check,
4861: $env{'user.domain'},$env{'user.name'});
4862: my ($tmp)=keys(%locked);
4863: if ($tmp=~/^error:/) { undef(%locked); }
4864:
4865: if (ref($locked{$file_name}) eq 'ARRAY') {
4866: $is_locked = 'false';
4867: foreach my $entry (@{$locked{$file_name}}) {
4868: if (ref($entry) eq 'ARRAY') {
4869: $is_locked = 'true';
4870: last;
4871: }
4872: }
4873: } else {
4874: $is_locked = 'false';
4875: }
4876: }
4877:
4878: sub declutter_portfile {
4879: my ($file) = @_;
4880: &logthis("got $file");
4881: $file =~ s-^(/portfolio/|portfolio/)-/-;
4882: &logthis("ret $file");
4883: return $file;
4884: }
4885:
4886: # ------------------------------------------------------------- Mark as Read Only
4887:
4888: sub mark_as_readonly {
4889: my ($domain,$user,$files,$what) = @_;
4890: my %current_permissions = &dump('file_permissions',$domain,$user);
4891: my ($tmp)=keys(%current_permissions);
4892: if ($tmp=~/^error:/) { undef(%current_permissions); }
4893: foreach my $file (@{$files}) {
4894: $file = &declutter_portfile($file);
4895: push(@{$current_permissions{$file}},$what);
4896: }
4897: &put('file_permissions',\%current_permissions,$domain,$user);
4898: return;
4899: }
4900:
4901: # ------------------------------------------------------------Save Selected Files
4902:
4903: sub save_selected_files {
4904: my ($user, $path, @files) = @_;
4905: my $filename = $user."savedfiles";
4906: my @other_files = &files_not_in_path($user, $path);
4907: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4908: foreach my $file (@files) {
4909: print (OUT $env{'form.currentpath'}.$file."\n");
4910: }
4911: foreach my $file (@other_files) {
4912: print (OUT $file."\n");
4913: }
4914: close (OUT);
4915: return 'ok';
4916: }
4917:
4918: sub clear_selected_files {
4919: my ($user) = @_;
4920: my $filename = $user."savedfiles";
4921: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4922: print (OUT undef);
4923: close (OUT);
4924: return ("ok");
4925: }
4926:
4927: sub files_in_path {
4928: my ($user, $path) = @_;
4929: my $filename = $user."savedfiles";
4930: my %return_files;
4931: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4932: while (my $line_in = <IN>) {
4933: chomp ($line_in);
4934: my @paths_and_file = split (m!/!, $line_in);
4935: my $file_part = pop (@paths_and_file);
4936: my $path_part = join ('/', @paths_and_file);
4937: $path_part.='/';
4938: my $path_and_file = $path_part.$file_part;
4939: if ($path_part eq $path) {
4940: $return_files{$file_part}= 'selected';
4941: }
4942: }
4943: close (IN);
4944: return (\%return_files);
4945: }
4946:
4947: # called in portfolio select mode, to show files selected NOT in current directory
4948: sub files_not_in_path {
4949: my ($user, $path) = @_;
4950: my $filename = $user."savedfiles";
4951: my @return_files;
4952: my $path_part;
4953: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4954: while (<IN>) {
4955: #ok, I know it's clunky, but I want it to work
4956: my @paths_and_file = split m!/!, $_;
4957: my $file_part = pop (@paths_and_file);
4958: chomp ($file_part);
4959: my $path_part = join ('/', @paths_and_file);
4960: $path_part .= '/';
4961: my $path_and_file = $path_part.$file_part;
4962: if ($path_part ne $path) {
4963: push (@return_files, ($path_and_file));
4964: }
4965: }
4966: close (OUT);
4967: return (@return_files);
4968: }
4969:
4970: #----------------------------------------------Get portfolio file permissions
4971:
4972: sub get_portfile_permissions {
4973: my ($domain,$user) = @_;
4974: my %current_permissions = &dump('file_permissions',$domain,$user);
4975: my ($tmp)=keys(%current_permissions);
4976: if ($tmp=~/^error:/) { undef(%current_permissions); }
4977: return \%current_permissions;
4978: }
4979:
4980: #---------------------------------------------Get portfolio file access controls
4981:
4982: sub get_access_controls {
4983: my ($current_permissions,$group,$file) = @_;
4984: my %access;
4985: my $real_file = $file;
4986: $file =~ s/\.meta$//;
4987: if (defined($file)) {
4988: if (ref($$current_permissions{$file."\0".'accesscontrol'}) eq 'HASH') {
4989: foreach my $control (keys(%{$$current_permissions{$file."\0".'accesscontrol'}})) {
4990: $access{$real_file}{$control} = $$current_permissions{$file."\0".$control};
4991: }
4992: }
4993: } else {
4994: foreach my $key (keys(%{$current_permissions})) {
4995: if ($key =~ /\0accesscontrol$/) {
4996: if (defined($group)) {
4997: if ($key !~ m-^\Q$group\E/-) {
4998: next;
4999: }
5000: }
5001: my ($fullpath) = split(/\0/,$key);
5002: if (ref($$current_permissions{$key}) eq 'HASH') {
5003: foreach my $control (keys(%{$$current_permissions{$key}})) {
5004: $access{$fullpath}{$control}=$$current_permissions{$fullpath."\0".$control};
5005: }
5006: }
5007: }
5008: }
5009: }
5010: return %access;
5011: }
5012:
5013: sub modify_access_controls {
5014: my ($file_name,$changes,$domain,$user)=@_;
5015: my ($outcome,$deloutcome);
5016: my %store_permissions;
5017: my %new_values;
5018: my %new_control;
5019: my %translation;
5020: my @deletions = ();
5021: my $now = time;
5022: if (exists($$changes{'activate'})) {
5023: if (ref($$changes{'activate'}) eq 'HASH') {
5024: my @newitems = sort(keys(%{$$changes{'activate'}}));
5025: my $numnew = scalar(@newitems);
5026: for (my $i=0; $i<$numnew; $i++) {
5027: my $newkey = $newitems[$i];
5028: my $newid = &Apache::loncommon::get_cgi_id();
5029: $newkey =~ s/^(\d+)/$newid/;
5030: $translation{$1} = $newid;
5031: $new_values{$file_name."\0".$newkey} =
5032: $$changes{'activate'}{$newitems[$i]};
5033: $new_control{$newkey} = $now;
5034: }
5035: }
5036: }
5037: my %todelete;
5038: my %changed_items;
5039: foreach my $action ('delete','update') {
5040: if (exists($$changes{$action})) {
5041: if (ref($$changes{$action}) eq 'HASH') {
5042: foreach my $key (keys(%{$$changes{$action}})) {
5043: my ($itemnum) = ($key =~ /^([^:]+):/);
5044: if ($action eq 'delete') {
5045: $todelete{$itemnum} = 1;
5046: } else {
5047: $changed_items{$itemnum} = $key;
5048: }
5049: }
5050: }
5051: }
5052: }
5053: # get lock on access controls for file.
5054: my $lockhash = {
5055: $file_name."\0".'locked_access_records' => $env{'user.name'}.
5056: ':'.$env{'user.domain'},
5057: };
5058: my $tries = 0;
5059: my $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5060:
5061: while (($gotlock ne 'ok') && $tries <3) {
5062: $tries ++;
5063: sleep 1;
5064: $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5065: }
5066: if ($gotlock eq 'ok') {
5067: my %curr_permissions = &dump('file_permissions',$domain,$user,$file_name);
5068: my ($tmp)=keys(%curr_permissions);
5069: if ($tmp=~/^error:/) { undef(%curr_permissions); }
5070: if (exists($curr_permissions{$file_name."\0".'accesscontrol'})) {
5071: my $curr_controls = $curr_permissions{$file_name."\0".'accesscontrol'};
5072: if (ref($curr_controls) eq 'HASH') {
5073: foreach my $control_item (keys(%{$curr_controls})) {
5074: my ($itemnum) = ($control_item =~ /^([^:]+):/);
5075: if (defined($todelete{$itemnum})) {
5076: push(@deletions,$file_name."\0".$control_item);
5077: } else {
5078: if (defined($changed_items{$itemnum})) {
5079: $new_control{$changed_items{$itemnum}} = $now;
5080: push(@deletions,$file_name."\0".$control_item);
5081: $new_values{$file_name."\0".$changed_items{$itemnum}} = $$changes{'update'}{$changed_items{$itemnum}};
5082: } else {
5083: $new_control{$control_item} = $$curr_controls{$control_item};
5084: }
5085: }
5086: }
5087: }
5088: }
5089: $deloutcome = &del('file_permissions',\@deletions,$domain,$user);
5090: $new_values{$file_name."\0".'accesscontrol'} = \%new_control;
5091: $outcome = &put('file_permissions',\%new_values,$domain,$user);
5092: # remove lock
5093: my @del_lock = ($file_name."\0".'locked_access_records');
5094: my $dellockoutcome = &del('file_permissions',\@del_lock,$domain,$user);
5095: } else {
5096: $outcome = "error: could not obtain lockfile\n";
5097: }
5098: return ($outcome,$deloutcome,\%new_values,\%translation);
5099: }
5100:
5101: #------------------------------------------------------Get Marked as Read Only
5102:
5103: sub get_marked_as_readonly {
5104: my ($domain,$user,$what,$group) = @_;
5105: my $current_permissions = &get_portfile_permissions($domain,$user);
5106: my @readonly_files;
5107: my $cmp1=$what;
5108: if (ref($what)) { $cmp1=join('',@{$what}) };
5109: while (my ($file_name,$value) = each(%{$current_permissions})) {
5110: if (defined($group)) {
5111: if ($file_name !~ m-^\Q$group\E/-) {
5112: next;
5113: }
5114: }
5115: if (ref($value) eq "ARRAY"){
5116: foreach my $stored_what (@{$value}) {
5117: my $cmp2=$stored_what;
5118: if (ref($stored_what) eq 'ARRAY') {
5119: $cmp2=join('',@{$stored_what});
5120: }
5121: if ($cmp1 eq $cmp2) {
5122: push(@readonly_files, $file_name);
5123: last;
5124: } elsif (!defined($what)) {
5125: push(@readonly_files, $file_name);
5126: last;
5127: }
5128: }
5129: }
5130: }
5131: return @readonly_files;
5132: }
5133: #-----------------------------------------------------------Get Marked as Read Only Hash
5134:
5135: sub get_marked_as_readonly_hash {
5136: my ($current_permissions,$group,$what) = @_;
5137: my %readonly_files;
5138: while (my ($file_name,$value) = each(%{$current_permissions})) {
5139: if (defined($group)) {
5140: if ($file_name !~ m-^\Q$group\E/-) {
5141: next;
5142: }
5143: }
5144: if (ref($value) eq "ARRAY"){
5145: foreach my $stored_what (@{$value}) {
5146: if (ref($stored_what) eq 'ARRAY') {
5147: foreach my $lock_descriptor(@{$stored_what}) {
5148: if ($lock_descriptor eq 'graded') {
5149: $readonly_files{$file_name} = 'graded';
5150: } elsif ($lock_descriptor eq 'handback') {
5151: $readonly_files{$file_name} = 'handback';
5152: } else {
5153: if (!exists($readonly_files{$file_name})) {
5154: $readonly_files{$file_name} = 'locked';
5155: }
5156: }
5157: }
5158: }
5159: }
5160: }
5161: }
5162: return %readonly_files;
5163: }
5164: # ------------------------------------------------------------ Unmark as Read Only
5165:
5166: sub unmark_as_readonly {
5167: # unmarks $file_name (if $file_name is defined), or all files locked by $what
5168: # for portfolio submissions, $what contains [$symb,$crsid]
5169: my ($domain,$user,$what,$file_name,$group) = @_;
5170: $file_name = &declutter_portfile($file_name);
5171: my $symb_crs = $what;
5172: if (ref($what)) { $symb_crs=join('',@$what); }
5173: my %current_permissions = &dump('file_permissions',$domain,$user,$group);
5174: my ($tmp)=keys(%current_permissions);
5175: if ($tmp=~/^error:/) { undef(%current_permissions); }
5176: my @readonly_files = &get_marked_as_readonly($domain,$user,$what,$group);
5177: foreach my $file (@readonly_files) {
5178: my $clean_file = &declutter_portfile($file);
5179: if (defined($file_name) && ($file_name ne $clean_file)) { next; }
5180: my $current_locks = $current_permissions{$file};
5181: my @new_locks;
5182: my @del_keys;
5183: if (ref($current_locks) eq "ARRAY"){
5184: foreach my $locker (@{$current_locks}) {
5185: my $compare=$locker;
5186: if (ref($locker) eq 'ARRAY') {
5187: $compare=join('',@{$locker});
5188: if ($compare ne $symb_crs) {
5189: push(@new_locks, $locker);
5190: }
5191: }
5192: }
5193: if (scalar(@new_locks) > 0) {
5194: $current_permissions{$file} = \@new_locks;
5195: } else {
5196: push(@del_keys, $file);
5197: &del('file_permissions',\@del_keys, $domain, $user);
5198: delete($current_permissions{$file});
5199: }
5200: }
5201: }
5202: &put('file_permissions',\%current_permissions,$domain,$user);
5203: return;
5204: }
5205:
5206: # ------------------------------------------------------------ Directory lister
5207:
5208: sub dirlist {
5209: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
5210:
5211: $uri=~s/^\///;
5212: $uri=~s/\/$//;
5213: my ($udom, $uname);
5214: (undef,$udom,$uname)=split(/\//,$uri);
5215: if(defined($userdomain)) {
5216: $udom = $userdomain;
5217: }
5218: if(defined($username)) {
5219: $uname = $username;
5220: }
5221:
5222: my $dirRoot = $perlvar{'lonDocRoot'};
5223: if(defined($alternateDirectoryRoot)) {
5224: $dirRoot = $alternateDirectoryRoot;
5225: $dirRoot =~ s/\/$//;
5226: }
5227:
5228: if($udom) {
5229: if($uname) {
5230: my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
5231: homeserver($uname,$udom));
5232: my @listing_results;
5233: if ($listing eq 'unknown_cmd') {
5234: $listing=reply('ls:'.$dirRoot.'/'.$uri,
5235: homeserver($uname,$udom));
5236: @listing_results = split(/:/,$listing);
5237: } else {
5238: @listing_results = map { &unescape($_); } split(/:/,$listing);
5239: }
5240: return @listing_results;
5241: } elsif(!defined($alternateDirectoryRoot)) {
5242: my $tryserver;
5243: my %allusers=();
5244: foreach $tryserver (keys %libserv) {
5245: if($hostdom{$tryserver} eq $udom) {
5246: my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
5247: $udom, $tryserver);
5248: my @listing_results;
5249: if ($listing eq 'unknown_cmd') {
5250: $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
5251: $udom, $tryserver);
5252: @listing_results = split(/:/,$listing);
5253: } else {
5254: @listing_results =
5255: map { &unescape($_); } split(/:/,$listing);
5256: }
5257: if ($listing_results[0] ne 'no_such_dir' &&
5258: $listing_results[0] ne 'empty' &&
5259: $listing_results[0] ne 'con_lost') {
5260: foreach (@listing_results) {
5261: my ($entry,@stat)=split(/&/,$_);
5262: $allusers{$entry}=1;
5263: }
5264: }
5265: }
5266: }
5267: my $alluserstr='';
5268: foreach (sort keys %allusers) {
5269: $alluserstr.=$_.'&user:';
5270: }
5271: $alluserstr=~s/:$//;
5272: return split(/:/,$alluserstr);
5273: } else {
5274: my @emptyResults = ();
5275: push(@emptyResults, 'missing user name');
5276: return split(':',@emptyResults);
5277: }
5278: } elsif(!defined($alternateDirectoryRoot)) {
5279: my $tryserver;
5280: my %alldom=();
5281: foreach $tryserver (keys %libserv) {
5282: $alldom{$hostdom{$tryserver}}=1;
5283: }
5284: my $alldomstr='';
5285: foreach (sort keys %alldom) {
5286: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
5287: }
5288: $alldomstr=~s/:$//;
5289: return split(/:/,$alldomstr);
5290: } else {
5291: my @emptyResults = ();
5292: push(@emptyResults, 'missing domain');
5293: return split(':',@emptyResults);
5294: }
5295: }
5296:
5297: # --------------------------------------------- GetFileTimestamp
5298: # This function utilizes dirlist and returns the date stamp for
5299: # when it was last modified. It will also return an error of -1
5300: # if an error occurs
5301:
5302: ##
5303: ## FIXME: This subroutine assumes its caller knows something about the
5304: ## directory structure of the home server for the student ($root).
5305: ## Not a good assumption to make. Since this is for looking up files
5306: ## in user directories, the full path should be constructed by lond, not
5307: ## whatever machine we request data from.
5308: ##
5309: sub GetFileTimestamp {
5310: my ($studentDomain,$studentName,$filename,$root)=@_;
5311: $studentDomain=~s/\W//g;
5312: $studentName=~s/\W//g;
5313: my $subdir=$studentName.'__';
5314: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
5315: my $proname="$studentDomain/$subdir/$studentName";
5316: $proname .= '/'.$filename;
5317: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
5318: $studentName, $root);
5319: my @stats = split('&', $fileStat);
5320: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5321: # @stats contains first the filename, then the stat output
5322: return $stats[10]; # so this is 10 instead of 9.
5323: } else {
5324: return -1;
5325: }
5326: }
5327:
5328: sub stat_file {
5329: my ($uri) = @_;
5330: $uri = &clutter_with_no_wrapper($uri);
5331:
5332: my ($udom,$uname,$file,$dir);
5333: if ($uri =~ m-^/(uploaded|editupload)/-) {
5334: ($udom,$uname,$file) =
5335: ($uri =~ m-/(?:uploaded|editupload)/?([^/]*)/?([^/]*)/?(.*)-);
5336: $file = 'userfiles/'.$file;
5337: $dir = &propath($udom,$uname);
5338: }
5339: if ($uri =~ m-^/res/-) {
5340: ($udom,$uname) =
5341: ($uri =~ m-/(?:res)/?([^/]*)/?([^/]*)/-);
5342: $file = $uri;
5343: }
5344:
5345: if (!$udom || !$uname || !$file) {
5346: # unable to handle the uri
5347: return ();
5348: }
5349:
5350: my ($result) = &dirlist($file,$udom,$uname,$dir);
5351: my @stats = split('&', $result);
5352:
5353: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5354: shift(@stats); #filename is first
5355: return @stats;
5356: }
5357: return ();
5358: }
5359:
5360: # -------------------------------------------------------- Value of a Condition
5361:
5362: # gets the value of a specific preevaluated condition
5363: # stored in the string $env{user.state.<cid>}
5364: # or looks up a condition reference in the bighash and if if hasn't
5365: # already been evaluated recurses into docondval to get the value of
5366: # the condition, then memoizing it to
5367: # $env{user.state.<cid>.<condition>}
5368: sub directcondval {
5369: my $number=shift;
5370: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
5371: &Apache::lonuserstate::evalstate();
5372: }
5373: if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
5374: return $env{'user.state.'.$env{'request.course.id'}.".$number"};
5375: } elsif ($number =~ /^_/) {
5376: my $sub_condition;
5377: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5378: &GDBM_READER(),0640)) {
5379: $sub_condition=$bighash{'conditions'.$number};
5380: untie(%bighash);
5381: }
5382: my $value = &docondval($sub_condition);
5383: &appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
5384: return $value;
5385: }
5386: if ($env{'user.state.'.$env{'request.course.id'}}) {
5387: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
5388: } else {
5389: return 2;
5390: }
5391: }
5392:
5393: # get the collection of conditions for this resource
5394: sub condval {
5395: my $condidx=shift;
5396: my $allpathcond='';
5397: foreach my $cond (split(/\|/,$condidx)) {
5398: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
5399: $allpathcond.=
5400: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
5401: }
5402: }
5403: $allpathcond=~s/\|$//;
5404: return &docondval($allpathcond);
5405: }
5406:
5407: #evaluates an expression of conditions
5408: sub docondval {
5409: my ($allpathcond) = @_;
5410: my $result=0;
5411: if ($env{'request.course.id'}
5412: && defined($allpathcond)) {
5413: my $operand='|';
5414: my @stack;
5415: foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
5416: if ($chunk eq '(') {
5417: push @stack,($operand,$result);
5418: } elsif ($chunk eq ')') {
5419: my $before=pop @stack;
5420: if (pop @stack eq '&') {
5421: $result=$result>$before?$before:$result;
5422: } else {
5423: $result=$result>$before?$result:$before;
5424: }
5425: } elsif (($chunk eq '&') || ($chunk eq '|')) {
5426: $operand=$chunk;
5427: } else {
5428: my $new=directcondval($chunk);
5429: if ($operand eq '&') {
5430: $result=$result>$new?$new:$result;
5431: } else {
5432: $result=$result>$new?$result:$new;
5433: }
5434: }
5435: }
5436: }
5437: return $result;
5438: }
5439:
5440: # ---------------------------------------------------- Devalidate courseresdata
5441:
5442: sub devalidatecourseresdata {
5443: my ($coursenum,$coursedomain)=@_;
5444: my $hashid=$coursenum.':'.$coursedomain;
5445: &devalidate_cache_new('courseres',$hashid);
5446: }
5447:
5448:
5449: # --------------------------------------------------- Course Resourcedata Query
5450:
5451: sub get_courseresdata {
5452: my ($coursenum,$coursedomain)=@_;
5453: my $coursehom=&homeserver($coursenum,$coursedomain);
5454: my $hashid=$coursenum.':'.$coursedomain;
5455: my ($result,$cached)=&is_cached_new('courseres',$hashid);
5456: my %dumpreply;
5457: unless (defined($cached)) {
5458: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
5459: $result=\%dumpreply;
5460: my ($tmp) = keys(%dumpreply);
5461: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
5462: &do_cache_new('courseres',$hashid,$result,600);
5463: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
5464: return $tmp;
5465: } elsif ($tmp =~ /^(error)/) {
5466: $result=undef;
5467: &do_cache_new('courseres',$hashid,$result,600);
5468: }
5469: }
5470: return $result;
5471: }
5472:
5473: sub devalidateuserresdata {
5474: my ($uname,$udom)=@_;
5475: my $hashid="$udom:$uname";
5476: &devalidate_cache_new('userres',$hashid);
5477: }
5478:
5479: sub get_userresdata {
5480: my ($uname,$udom)=@_;
5481: #most student don\'t have any data set, check if there is some data
5482: if (&EXT_cache_status($udom,$uname)) { return undef; }
5483:
5484: my $hashid="$udom:$uname";
5485: my ($result,$cached)=&is_cached_new('userres',$hashid);
5486: if (!defined($cached)) {
5487: my %resourcedata=&dump('resourcedata',$udom,$uname);
5488: $result=\%resourcedata;
5489: &do_cache_new('userres',$hashid,$result,600);
5490: }
5491: my ($tmp)=keys(%$result);
5492: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
5493: return $result;
5494: }
5495: #error 2 occurs when the .db doesn't exist
5496: if ($tmp!~/error: 2 /) {
5497: &logthis("<font color=\"blue\">WARNING:".
5498: " Trying to get resource data for ".
5499: $uname." at ".$udom.": ".
5500: $tmp."</font>");
5501: } elsif ($tmp=~/error: 2 /) {
5502: #&EXT_cache_set($udom,$uname);
5503: &do_cache_new('userres',$hashid,undef,600);
5504: undef($tmp); # not really an error so don't send it back
5505: }
5506: return $tmp;
5507: }
5508:
5509: sub resdata {
5510: my ($name,$domain,$type,@which)=@_;
5511: my $result;
5512: if ($type eq 'course') {
5513: $result=&get_courseresdata($name,$domain);
5514: } elsif ($type eq 'user') {
5515: $result=&get_userresdata($name,$domain);
5516: }
5517: if (!ref($result)) { return $result; }
5518: foreach my $item (@which) {
5519: if (defined($result->{$item})) {
5520: return $result->{$item};
5521: }
5522: }
5523: return undef;
5524: }
5525:
5526: #
5527: # EXT resource caching routines
5528: #
5529:
5530: sub clear_EXT_cache_status {
5531: &delenv('cache.EXT.');
5532: }
5533:
5534: sub EXT_cache_status {
5535: my ($target_domain,$target_user) = @_;
5536: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5537: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
5538: # We know already the user has no data
5539: return 1;
5540: } else {
5541: return 0;
5542: }
5543: }
5544:
5545: sub EXT_cache_set {
5546: my ($target_domain,$target_user) = @_;
5547: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5548: #&appenv($cachename => time);
5549: }
5550:
5551: # --------------------------------------------------------- Value of a Variable
5552: sub EXT {
5553:
5554: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
5555: unless ($varname) { return ''; }
5556: #get real user name/domain, courseid and symb
5557: my $courseid;
5558: my $publicuser;
5559: if ($symbparm) {
5560: $symbparm=&get_symb_from_alias($symbparm);
5561: }
5562: if (!($uname && $udom)) {
5563: (my $cursymb,$courseid,$udom,$uname,$publicuser)= &whichuser($symbparm);
5564: if (!$symbparm) { $symbparm=$cursymb; }
5565: } else {
5566: $courseid=$env{'request.course.id'};
5567: }
5568: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
5569: my $rest;
5570: if (defined($therest[0])) {
5571: $rest=join('.',@therest);
5572: } else {
5573: $rest='';
5574: }
5575:
5576: my $qualifierrest=$qualifier;
5577: if ($rest) { $qualifierrest.='.'.$rest; }
5578: my $spacequalifierrest=$space;
5579: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
5580: if ($realm eq 'user') {
5581: # --------------------------------------------------------------- user.resource
5582: if ($space eq 'resource') {
5583: if ( (defined($Apache::lonhomework::parsing_a_problem)
5584: || defined($Apache::lonhomework::parsing_a_task))
5585: &&
5586: ($symbparm eq &symbread()) ) {
5587: # if we are in the middle of processing the resource the
5588: # get the value we are planning on committing
5589: if (defined($Apache::lonhomework::results{$qualifierrest})) {
5590: return $Apache::lonhomework::results{$qualifierrest};
5591: } else {
5592: return $Apache::lonhomework::history{$qualifierrest};
5593: }
5594: } else {
5595: my %restored;
5596: if ($publicuser || $env{'request.state'} eq 'construct') {
5597: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
5598: } else {
5599: %restored=&restore($symbparm,$courseid,$udom,$uname);
5600: }
5601: return $restored{$qualifierrest};
5602: }
5603: # ----------------------------------------------------------------- user.access
5604: } elsif ($space eq 'access') {
5605: # FIXME - not supporting calls for a specific user
5606: return &allowed($qualifier,$rest);
5607: # ------------------------------------------ user.preferences, user.environment
5608: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
5609: if (($uname eq $env{'user.name'}) &&
5610: ($udom eq $env{'user.domain'})) {
5611: return $env{join('.',('environment',$qualifierrest))};
5612: } else {
5613: my %returnhash;
5614: if (!$publicuser) {
5615: %returnhash=&userenvironment($udom,$uname,
5616: $qualifierrest);
5617: }
5618: return $returnhash{$qualifierrest};
5619: }
5620: # ----------------------------------------------------------------- user.course
5621: } elsif ($space eq 'course') {
5622: # FIXME - not supporting calls for a specific user
5623: return $env{join('.',('request.course',$qualifier))};
5624: # ------------------------------------------------------------------- user.role
5625: } elsif ($space eq 'role') {
5626: # FIXME - not supporting calls for a specific user
5627: my ($role,$where)=split(/\./,$env{'request.role'});
5628: if ($qualifier eq 'value') {
5629: return $role;
5630: } elsif ($qualifier eq 'extent') {
5631: return $where;
5632: }
5633: # ----------------------------------------------------------------- user.domain
5634: } elsif ($space eq 'domain') {
5635: return $udom;
5636: # ------------------------------------------------------------------- user.name
5637: } elsif ($space eq 'name') {
5638: return $uname;
5639: # ---------------------------------------------------- Any other user namespace
5640: } else {
5641: my %reply;
5642: if (!$publicuser) {
5643: %reply=&get($space,[$qualifierrest],$udom,$uname);
5644: }
5645: return $reply{$qualifierrest};
5646: }
5647: } elsif ($realm eq 'query') {
5648: # ---------------------------------------------- pull stuff out of query string
5649: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
5650: [$spacequalifierrest]);
5651: return $env{'form.'.$spacequalifierrest};
5652: } elsif ($realm eq 'request') {
5653: # ------------------------------------------------------------- request.browser
5654: if ($space eq 'browser') {
5655: if ($qualifier eq 'textremote') {
5656: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
5657: return 1;
5658: } else {
5659: return 0;
5660: }
5661: } else {
5662: return $env{'browser.'.$qualifier};
5663: }
5664: # ------------------------------------------------------------ request.filename
5665: } else {
5666: return $env{'request.'.$spacequalifierrest};
5667: }
5668: } elsif ($realm eq 'course') {
5669: # ---------------------------------------------------------- course.description
5670: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
5671: } elsif ($realm eq 'resource') {
5672:
5673: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
5674: if (!$symbparm) { $symbparm=&symbread(); }
5675: }
5676:
5677: if ($space eq 'title') {
5678: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
5679: return &gettitle($symbparm);
5680: }
5681:
5682: if ($space eq 'map') {
5683: my ($map) = &decode_symb($symbparm);
5684: return &symbread($map);
5685: }
5686:
5687: my ($section, $group, @groups);
5688: my ($courselevelm,$courselevel);
5689: if ($symbparm && defined($courseid) &&
5690: $courseid eq $env{'request.course.id'}) {
5691:
5692: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
5693:
5694: # ----------------------------------------------------- Cascading lookup scheme
5695: my $symbp=$symbparm;
5696: my $mapp=&deversion((&decode_symb($symbp))[0]);
5697:
5698: my $symbparm=$symbp.'.'.$spacequalifierrest;
5699: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
5700:
5701: if (($env{'user.name'} eq $uname) &&
5702: ($env{'user.domain'} eq $udom)) {
5703: $section=$env{'request.course.sec'};
5704: @groups = split(/:/,$env{'request.course.groups'});
5705: @groups=&sort_course_groups($courseid,@groups);
5706: } else {
5707: if (! defined($usection)) {
5708: $section=&getsection($udom,$uname,$courseid);
5709: } else {
5710: $section = $usection;
5711: }
5712: @groups = &get_users_groups($udom,$uname,$courseid);
5713: }
5714:
5715: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
5716: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
5717: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
5718:
5719: $courselevel=$courseid.'.'.$spacequalifierrest;
5720: my $courselevelr=$courseid.'.'.$symbparm;
5721: $courselevelm=$courseid.'.'.$mapparm;
5722:
5723: # ----------------------------------------------------------- first, check user
5724:
5725: my $userreply=&resdata($uname,$udom,'user',
5726: ($courselevelr,$courselevelm,
5727: $courselevel));
5728: if (defined($userreply)) { return $userreply; }
5729:
5730: # ------------------------------------------------ second, check some of course
5731: my $coursereply;
5732: if (@groups > 0) {
5733: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
5734: $mapparm,$spacequalifierrest);
5735: if (defined($coursereply)) { return $coursereply; }
5736: }
5737:
5738: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
5739: $env{'course.'.$courseid.'.domain'},
5740: 'course',
5741: ($seclevelr,$seclevelm,$seclevel,
5742: $courselevelr));
5743: if (defined($coursereply)) { return $coursereply; }
5744:
5745: # ------------------------------------------------------ third, check map parms
5746: my %parmhash=();
5747: my $thisparm='';
5748: if (tie(%parmhash,'GDBM_File',
5749: $env{'request.course.fn'}.'_parms.db',
5750: &GDBM_READER(),0640)) {
5751: $thisparm=$parmhash{$symbparm};
5752: untie(%parmhash);
5753: }
5754: if ($thisparm) { return $thisparm; }
5755: }
5756: # ------------------------------------------ fourth, look in resource metadata
5757:
5758: $spacequalifierrest=~s/\./\_/;
5759: my $filename;
5760: if (!$symbparm) { $symbparm=&symbread(); }
5761: if ($symbparm) {
5762: $filename=(&decode_symb($symbparm))[2];
5763: } else {
5764: $filename=$env{'request.filename'};
5765: }
5766: my $metadata=&metadata($filename,$spacequalifierrest);
5767: if (defined($metadata)) { return $metadata; }
5768: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
5769: if (defined($metadata)) { return $metadata; }
5770:
5771: # ---------------------------------------------- fourth, look in rest pf course
5772: if ($symbparm && defined($courseid) &&
5773: $courseid eq $env{'request.course.id'}) {
5774: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
5775: $env{'course.'.$courseid.'.domain'},
5776: 'course',
5777: ($courselevelm,$courselevel));
5778: if (defined($coursereply)) { return $coursereply; }
5779: }
5780: # ------------------------------------------------------------------ Cascade up
5781: unless ($space eq '0') {
5782: my @parts=split(/_/,$space);
5783: my $id=pop(@parts);
5784: my $part=join('_',@parts);
5785: if ($part eq '') { $part='0'; }
5786: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
5787: $symbparm,$udom,$uname,$section,1);
5788: if (defined($partgeneral)) { return $partgeneral; }
5789: }
5790: if ($recurse) { return undef; }
5791: my $pack_def=&packages_tab_default($filename,$varname);
5792: if (defined($pack_def)) { return $pack_def; }
5793:
5794: # ---------------------------------------------------- Any other user namespace
5795: } elsif ($realm eq 'environment') {
5796: # ----------------------------------------------------------------- environment
5797: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
5798: return $env{'environment.'.$spacequalifierrest};
5799: } else {
5800: if ($uname eq 'anonymous' && $udom eq '') {
5801: return '';
5802: }
5803: my %returnhash=&userenvironment($udom,$uname,
5804: $spacequalifierrest);
5805: return $returnhash{$spacequalifierrest};
5806: }
5807: } elsif ($realm eq 'system') {
5808: # ----------------------------------------------------------------- system.time
5809: if ($space eq 'time') {
5810: return time;
5811: }
5812: } elsif ($realm eq 'server') {
5813: # ----------------------------------------------------------------- system.time
5814: if ($space eq 'name') {
5815: return $ENV{'SERVER_NAME'};
5816: }
5817: }
5818: return '';
5819: }
5820:
5821: sub check_group_parms {
5822: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
5823: my @groupitems = ();
5824: my $resultitem;
5825: my @levels = ($symbparm,$mapparm,$what);
5826: foreach my $group (@{$groups}) {
5827: foreach my $level (@levels) {
5828: my $item = $courseid.'.['.$group.'].'.$level;
5829: push(@groupitems,$item);
5830: }
5831: }
5832: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
5833: $env{'course.'.$courseid.'.domain'},
5834: 'course',@groupitems);
5835: return $coursereply;
5836: }
5837:
5838: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
5839: my ($courseid,@groups) = @_;
5840: @groups = sort(@groups);
5841: return @groups;
5842: }
5843:
5844: sub packages_tab_default {
5845: my ($uri,$varname)=@_;
5846: my (undef,$part,$name)=split(/\./,$varname);
5847:
5848: my (@extension,@specifics,$do_default);
5849: foreach my $package (split(/,/,&metadata($uri,'packages'))) {
5850: my ($pack_type,$pack_part)=split(/_/,$package,2);
5851: if ($pack_type eq 'default') {
5852: $do_default=1;
5853: } elsif ($pack_type eq 'extension') {
5854: push(@extension,[$package,$pack_type,$pack_part]);
5855: } else {
5856: push(@specifics,[$package,$pack_type,$pack_part]);
5857: }
5858: }
5859: # first look for a package that matches the requested part id
5860: foreach my $package (@specifics) {
5861: my (undef,$pack_type,$pack_part)=@{$package};
5862: next if ($pack_part ne $part);
5863: if (defined($packagetab{"$pack_type&$name&default"})) {
5864: return $packagetab{"$pack_type&$name&default"};
5865: }
5866: }
5867: # look for any possible matching non extension_ package
5868: foreach my $package (@specifics) {
5869: my (undef,$pack_type,$pack_part)=@{$package};
5870: if (defined($packagetab{"$pack_type&$name&default"})) {
5871: return $packagetab{"$pack_type&$name&default"};
5872: }
5873: if ($pack_type eq 'part') { $pack_part='0'; }
5874: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
5875: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
5876: }
5877: }
5878: # look for any posible extension_ match
5879: foreach my $package (@extension) {
5880: my ($package,$pack_type)=@{$package};
5881: if (defined($packagetab{"$pack_type&$name&default"})) {
5882: return $packagetab{"$pack_type&$name&default"};
5883: }
5884: if (defined($packagetab{$package."&$name&default"})) {
5885: return $packagetab{$package."&$name&default"};
5886: }
5887: }
5888: # look for a global default setting
5889: if ($do_default && defined($packagetab{"default&$name&default"})) {
5890: return $packagetab{"default&$name&default"};
5891: }
5892: return undef;
5893: }
5894:
5895: sub add_prefix_and_part {
5896: my ($prefix,$part)=@_;
5897: my $keyroot;
5898: if (defined($prefix) && $prefix !~ /^__/) {
5899: # prefix that has a part already
5900: $keyroot=$prefix;
5901: } elsif (defined($prefix)) {
5902: # prefix that is missing a part
5903: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
5904: } else {
5905: # no prefix at all
5906: if (defined($part)) { $keyroot='_'.$part; }
5907: }
5908: return $keyroot;
5909: }
5910:
5911: # ---------------------------------------------------------------- Get metadata
5912:
5913: my %metaentry;
5914: sub metadata {
5915: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
5916: $uri=&declutter($uri);
5917: # if it is a non metadata possible uri return quickly
5918: if (($uri eq '') ||
5919: (($uri =~ m|^/*adm/|) &&
5920: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
5921: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
5922: ($uri =~ m|home/[^/]+/public_html/|)) {
5923: return undef;
5924: }
5925: my $filename=$uri;
5926: $uri=~s/\.meta$//;
5927: #
5928: # Is the metadata already cached?
5929: # Look at timestamp of caching
5930: # Everything is cached by the main uri, libraries are never directly cached
5931: #
5932: if (!defined($liburi)) {
5933: my ($result,$cached)=&is_cached_new('meta',$uri);
5934: if (defined($cached)) { return $result->{':'.$what}; }
5935: }
5936: {
5937: #
5938: # Is this a recursive call for a library?
5939: #
5940: # if (! exists($metacache{$uri})) {
5941: # $metacache{$uri}={};
5942: # }
5943: if ($liburi) {
5944: $liburi=&declutter($liburi);
5945: $filename=$liburi;
5946: } else {
5947: &devalidate_cache_new('meta',$uri);
5948: undef(%metaentry);
5949: }
5950: my %metathesekeys=();
5951: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
5952: my $metastring;
5953: if ($uri !~ m -^(editupload)/-) {
5954: my $file=&filelocation('',&clutter($filename));
5955: #push(@{$metaentry{$uri.'.file'}},$file);
5956: $metastring=&getfile($file);
5957: }
5958: my $parser=HTML::LCParser->new(\$metastring);
5959: my $token;
5960: undef %metathesekeys;
5961: while ($token=$parser->get_token) {
5962: if ($token->[0] eq 'S') {
5963: if (defined($token->[2]->{'package'})) {
5964: #
5965: # This is a package - get package info
5966: #
5967: my $package=$token->[2]->{'package'};
5968: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5969: if (defined($token->[2]->{'id'})) {
5970: $keyroot.='_'.$token->[2]->{'id'};
5971: }
5972: if ($metaentry{':packages'}) {
5973: $metaentry{':packages'}.=','.$package.$keyroot;
5974: } else {
5975: $metaentry{':packages'}=$package.$keyroot;
5976: }
5977: foreach my $pack_entry (keys(%packagetab)) {
5978: my $part=$keyroot;
5979: $part=~s/^\_//;
5980: if ($pack_entry=~/^\Q$package\E\&/ ||
5981: $pack_entry=~/^\Q$package\E_0\&/) {
5982: my ($pack,$name,$subp)=split(/\&/,$pack_entry);
5983: # ignore package.tab specified default values
5984: # here &package_tab_default() will fetch those
5985: if ($subp eq 'default') { next; }
5986: my $value=$packagetab{$pack_entry};
5987: my $unikey;
5988: if ($pack =~ /_0$/) {
5989: $unikey='parameter_0_'.$name;
5990: $part=0;
5991: } else {
5992: $unikey='parameter'.$keyroot.'_'.$name;
5993: }
5994: if ($subp eq 'display') {
5995: $value.=' [Part: '.$part.']';
5996: }
5997: $metaentry{':'.$unikey.'.part'}=$part;
5998: $metathesekeys{$unikey}=1;
5999: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6000: $metaentry{':'.$unikey.'.'.$subp}=$value;
6001: }
6002: if (defined($metaentry{':'.$unikey.'.default'})) {
6003: $metaentry{':'.$unikey}=
6004: $metaentry{':'.$unikey.'.default'};
6005: }
6006: }
6007: }
6008: } else {
6009: #
6010: # This is not a package - some other kind of start tag
6011: #
6012: my $entry=$token->[1];
6013: my $unikey;
6014: if ($entry eq 'import') {
6015: $unikey='';
6016: } else {
6017: $unikey=$entry;
6018: }
6019: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6020:
6021: if (defined($token->[2]->{'id'})) {
6022: $unikey.='_'.$token->[2]->{'id'};
6023: }
6024:
6025: if ($entry eq 'import') {
6026: #
6027: # Importing a library here
6028: #
6029: if ($depthcount<20) {
6030: my $location=$parser->get_text('/import');
6031: my $dir=$filename;
6032: $dir=~s|[^/]*$||;
6033: $location=&filelocation($dir,$location);
6034: my $metadata =
6035: &metadata($uri,'keys', $location,$unikey,
6036: $depthcount+1);
6037: foreach my $meta (split(',',$metadata)) {
6038: $metaentry{':'.$meta}=$metaentry{':'.$meta};
6039: $metathesekeys{$meta}=1;
6040: }
6041: }
6042: } else {
6043:
6044: if (defined($token->[2]->{'name'})) {
6045: $unikey.='_'.$token->[2]->{'name'};
6046: }
6047: $metathesekeys{$unikey}=1;
6048: foreach my $param (@{$token->[3]}) {
6049: $metaentry{':'.$unikey.'.'.$param} =
6050: $token->[2]->{$param};
6051: }
6052: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
6053: my $default=$metaentry{':'.$unikey.'.default'};
6054: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
6055: # only ws inside the tag, and not in default, so use default
6056: # as value
6057: $metaentry{':'.$unikey}=$default;
6058: } else {
6059: # either something interesting inside the tag or default
6060: # uninteresting
6061: $metaentry{':'.$unikey}=$internaltext;
6062: }
6063: # end of not-a-package not-a-library import
6064: }
6065: # end of not-a-package start tag
6066: }
6067: # the next is the end of "start tag"
6068: }
6069: }
6070: my ($extension) = ($uri =~ /\.(\w+)$/);
6071: foreach my $key (keys(%packagetab)) {
6072: #no specific packages #how's our extension
6073: if ($key!~/^extension_\Q$extension\E&/) { next; }
6074: &metadata_create_package_def($uri,$key,'extension_'.$extension,
6075: \%metathesekeys);
6076: }
6077: if (!exists($metaentry{':packages'})) {
6078: foreach my $key (keys(%packagetab)) {
6079: #no specific packages well let's get default then
6080: if ($key!~/^default&/) { next; }
6081: &metadata_create_package_def($uri,$key,'default',
6082: \%metathesekeys);
6083: }
6084: }
6085: # are there custom rights to evaluate
6086: if ($metaentry{':copyright'} eq 'custom') {
6087:
6088: #
6089: # Importing a rights file here
6090: #
6091: unless ($depthcount) {
6092: my $location=$metaentry{':customdistributionfile'};
6093: my $dir=$filename;
6094: $dir=~s|[^/]*$||;
6095: $location=&filelocation($dir,$location);
6096: my $rights_metadata =
6097: &metadata($uri,'keys',$location,'_rights',
6098: $depthcount+1);
6099: foreach my $rights (split(',',$rights_metadata)) {
6100: #$metaentry{':'.$rights}=$metacache{$uri}->{':'.$rights};
6101: $metathesekeys{$rights}=1;
6102: }
6103: }
6104: }
6105: # uniqifiy package listing
6106: my %seen;
6107: my @uniq_packages =
6108: grep { ! $seen{$_} ++ } (split(',',$metaentry{':packages'}));
6109: $metaentry{':packages'} = join(',',@uniq_packages);
6110:
6111: $metaentry{':keys'} = join(',',keys(%metathesekeys));
6112: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
6113: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
6114: &do_cache_new('meta',$uri,\%metaentry,60*60);
6115: # this is the end of "was not already recently cached
6116: }
6117: return $metaentry{':'.$what};
6118: }
6119:
6120: sub metadata_create_package_def {
6121: my ($uri,$key,$package,$metathesekeys)=@_;
6122: my ($pack,$name,$subp)=split(/\&/,$key);
6123: if ($subp eq 'default') { next; }
6124:
6125: if (defined($metaentry{':packages'})) {
6126: $metaentry{':packages'}.=','.$package;
6127: } else {
6128: $metaentry{':packages'}=$package;
6129: }
6130: my $value=$packagetab{$key};
6131: my $unikey;
6132: $unikey='parameter_0_'.$name;
6133: $metaentry{':'.$unikey.'.part'}=0;
6134: $$metathesekeys{$unikey}=1;
6135: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6136: $metaentry{':'.$unikey.'.'.$subp}=$value;
6137: }
6138: if (defined($metaentry{':'.$unikey.'.default'})) {
6139: $metaentry{':'.$unikey}=
6140: $metaentry{':'.$unikey.'.default'};
6141: }
6142: }
6143:
6144: sub metadata_generate_part0 {
6145: my ($metadata,$metacache,$uri) = @_;
6146: my %allnames;
6147: foreach my $metakey (keys(%$metadata)) {
6148: if ($metakey=~/^parameter\_(.*)/) {
6149: my $part=$$metacache{':'.$metakey.'.part'};
6150: my $name=$$metacache{':'.$metakey.'.name'};
6151: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
6152: $allnames{$name}=$part;
6153: }
6154: }
6155: }
6156: foreach my $name (keys(%allnames)) {
6157: $$metadata{"parameter_0_$name"}=1;
6158: my $key=":parameter_0_$name";
6159: $$metacache{"$key.part"}='0';
6160: $$metacache{"$key.name"}=$name;
6161: $$metacache{"$key.type"}=$$metacache{':parameter_'.
6162: $allnames{$name}.'_'.$name.
6163: '.type'};
6164: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
6165: '.display'};
6166: my $expr='[Part: '.$allnames{$name}.']';
6167: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
6168: $$metacache{"$key.display"}=$olddis;
6169: }
6170: }
6171:
6172: # ------------------------------------------------------ Devalidate title cache
6173:
6174: sub devalidate_title_cache {
6175: my ($url)=@_;
6176: if (!$env{'request.course.id'}) { return; }
6177: my $symb=&symbread($url);
6178: if (!$symb) { return; }
6179: my $key=$env{'request.course.id'}."\0".$symb;
6180: &devalidate_cache_new('title',$key);
6181: }
6182:
6183: # ------------------------------------------------- Get the title of a resource
6184:
6185: sub gettitle {
6186: my $urlsymb=shift;
6187: my $symb=&symbread($urlsymb);
6188: if ($symb) {
6189: my $key=$env{'request.course.id'}."\0".$symb;
6190: my ($result,$cached)=&is_cached_new('title',$key);
6191: if (defined($cached)) {
6192: return $result;
6193: }
6194: my ($map,$resid,$url)=&decode_symb($symb);
6195: my $title='';
6196: my %bighash;
6197: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6198: &GDBM_READER(),0640)) {
6199: my $mapid=$bighash{'map_pc_'.&clutter($map)};
6200: $title=$bighash{'title_'.$mapid.'.'.$resid};
6201: untie %bighash;
6202: }
6203: $title=~s/\&colon\;/\:/gs;
6204: if ($title) {
6205: return &do_cache_new('title',$key,$title,600);
6206: }
6207: $urlsymb=$url;
6208: }
6209: my $title=&metadata($urlsymb,'title');
6210: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
6211: return $title;
6212: }
6213:
6214: sub get_slot {
6215: my ($which,$cnum,$cdom)=@_;
6216: if (!$cnum || !$cdom) {
6217: (undef,my $courseid)=&whichuser();
6218: $cdom=$env{'course.'.$courseid.'.domain'};
6219: $cnum=$env{'course.'.$courseid.'.num'};
6220: }
6221: my $key=join("\0",'slots',$cdom,$cnum,$which);
6222: my %slotinfo;
6223: if (exists($remembered{$key})) {
6224: $slotinfo{$which} = $remembered{$key};
6225: } else {
6226: %slotinfo=&get('slots',[$which],$cdom,$cnum);
6227: &Apache::lonhomework::showhash(%slotinfo);
6228: my ($tmp)=keys(%slotinfo);
6229: if ($tmp=~/^error:/) { return (); }
6230: $remembered{$key} = $slotinfo{$which};
6231: }
6232: if (ref($slotinfo{$which}) eq 'HASH') {
6233: return %{$slotinfo{$which}};
6234: }
6235: return $slotinfo{$which};
6236: }
6237: # ------------------------------------------------- Update symbolic store links
6238:
6239: sub symblist {
6240: my ($mapname,%newhash)=@_;
6241: $mapname=&deversion(&declutter($mapname));
6242: my %hash;
6243: if (($env{'request.course.fn'}) && (%newhash)) {
6244: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6245: &GDBM_WRCREAT(),0640)) {
6246: foreach my $url (keys %newhash) {
6247: next if ($url eq 'last_known'
6248: && $env{'form.no_update_last_known'});
6249: $hash{declutter($url)}=&encode_symb($mapname,
6250: $newhash{$url}->[1],
6251: $newhash{$url}->[0]);
6252: }
6253: if (untie(%hash)) {
6254: return 'ok';
6255: }
6256: }
6257: }
6258: return 'error';
6259: }
6260:
6261: # --------------------------------------------------------------- Verify a symb
6262:
6263: sub symbverify {
6264: my ($symb,$thisurl)=@_;
6265: my $thisfn=$thisurl;
6266: $thisfn=&declutter($thisfn);
6267: # direct jump to resource in page or to a sequence - will construct own symbs
6268: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
6269: # check URL part
6270: my ($map,$resid,$url)=&decode_symb($symb);
6271:
6272: unless ($url eq $thisfn) { return 0; }
6273:
6274: $symb=&symbclean($symb);
6275: $thisurl=&deversion($thisurl);
6276: $thisfn=&deversion($thisfn);
6277:
6278: my %bighash;
6279: my $okay=0;
6280:
6281: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6282: &GDBM_READER(),0640)) {
6283: my $ids=$bighash{'ids_'.&clutter($thisurl)};
6284: unless ($ids) {
6285: $ids=$bighash{'ids_/'.$thisurl};
6286: }
6287: if ($ids) {
6288: # ------------------------------------------------------------------- Has ID(s)
6289: foreach (split(/\,/,$ids)) {
6290: my ($mapid,$resid)=split(/\./,$_);
6291: if (
6292: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
6293: eq $symb) {
6294: if (($env{'request.role.adv'}) ||
6295: $bighash{'encrypted_'.$_} eq $env{'request.enc'}) {
6296: $okay=1;
6297: }
6298: }
6299: }
6300: }
6301: untie(%bighash);
6302: }
6303: return $okay;
6304: }
6305:
6306: # --------------------------------------------------------------- Clean-up symb
6307:
6308: sub symbclean {
6309: my $symb=shift;
6310: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6311: # remove version from map
6312: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
6313:
6314: # remove version from URL
6315: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
6316:
6317: # remove wrapper
6318:
6319: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
6320: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
6321: return $symb;
6322: }
6323:
6324: # ---------------------------------------------- Split symb to find map and url
6325:
6326: sub encode_symb {
6327: my ($map,$resid,$url)=@_;
6328: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
6329: }
6330:
6331: sub decode_symb {
6332: my $symb=shift;
6333: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6334: my ($map,$resid,$url)=split(/___/,$symb);
6335: return (&fixversion($map),$resid,&fixversion($url));
6336: }
6337:
6338: sub fixversion {
6339: my $fn=shift;
6340: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
6341: my %bighash;
6342: my $uri=&clutter($fn);
6343: my $key=$env{'request.course.id'}.'_'.$uri;
6344: # is this cached?
6345: my ($result,$cached)=&is_cached_new('courseresversion',$key);
6346: if (defined($cached)) { return $result; }
6347: # unfortunately not cached, or expired
6348: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6349: &GDBM_READER(),0640)) {
6350: if ($bighash{'version_'.$uri}) {
6351: my $version=$bighash{'version_'.$uri};
6352: unless (($version eq 'mostrecent') ||
6353: ($version==&getversion($uri))) {
6354: $uri=~s/\.(\w+)$/\.$version\.$1/;
6355: }
6356: }
6357: untie %bighash;
6358: }
6359: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
6360: }
6361:
6362: sub deversion {
6363: my $url=shift;
6364: $url=~s/\.\d+\.(\w+)$/\.$1/;
6365: return $url;
6366: }
6367:
6368: # ------------------------------------------------------ Return symb list entry
6369:
6370: sub symbread {
6371: my ($thisfn,$donotrecurse)=@_;
6372: my $cache_str='request.symbread.cached.'.$thisfn;
6373: if (defined($env{$cache_str})) { return $env{$cache_str}; }
6374: # no filename provided? try from environment
6375: unless ($thisfn) {
6376: if ($env{'request.symb'}) {
6377: return $env{$cache_str}=&symbclean($env{'request.symb'});
6378: }
6379: $thisfn=$env{'request.filename'};
6380: }
6381: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
6382: # is that filename actually a symb? Verify, clean, and return
6383: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
6384: if (&symbverify($thisfn,$1)) {
6385: return $env{$cache_str}=&symbclean($thisfn);
6386: }
6387: }
6388: $thisfn=declutter($thisfn);
6389: my %hash;
6390: my %bighash;
6391: my $syval='';
6392: if (($env{'request.course.fn'}) && ($thisfn)) {
6393: my $targetfn = $thisfn;
6394: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
6395: $targetfn = 'adm/wrapper/'.$thisfn;
6396: }
6397: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
6398: $targetfn=$1;
6399: }
6400: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6401: &GDBM_READER(),0640)) {
6402: $syval=$hash{$targetfn};
6403: untie(%hash);
6404: }
6405: # ---------------------------------------------------------- There was an entry
6406: if ($syval) {
6407: #unless ($syval=~/\_\d+$/) {
6408: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
6409: #&appenv('request.ambiguous' => $thisfn);
6410: #return $env{$cache_str}='';
6411: #}
6412: #$syval.=$1;
6413: #}
6414: } else {
6415: # ------------------------------------------------------- Was not in symb table
6416: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6417: &GDBM_READER(),0640)) {
6418: # ---------------------------------------------- Get ID(s) for current resource
6419: my $ids=$bighash{'ids_'.&clutter($thisfn)};
6420: unless ($ids) {
6421: $ids=$bighash{'ids_/'.$thisfn};
6422: }
6423: unless ($ids) {
6424: # alias?
6425: $ids=$bighash{'mapalias_'.$thisfn};
6426: }
6427: if ($ids) {
6428: # ------------------------------------------------------------------- Has ID(s)
6429: my @possibilities=split(/\,/,$ids);
6430: if ($#possibilities==0) {
6431: # ----------------------------------------------- There is only one possibility
6432: my ($mapid,$resid)=split(/\./,$ids);
6433: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6434: $resid,$thisfn);
6435: } elsif (!$donotrecurse) {
6436: # ------------------------------------------ There is more than one possibility
6437: my $realpossible=0;
6438: foreach (@possibilities) {
6439: my $file=$bighash{'src_'.$_};
6440: if (&allowed('bre',$file)) {
6441: my ($mapid,$resid)=split(/\./,$_);
6442: if ($bighash{'map_type_'.$mapid} ne 'page') {
6443: $realpossible++;
6444: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6445: $resid,$thisfn);
6446: }
6447: }
6448: }
6449: if ($realpossible!=1) { $syval=''; }
6450: } else {
6451: $syval='';
6452: }
6453: }
6454: untie(%bighash)
6455: }
6456: }
6457: if ($syval) {
6458: return $env{$cache_str}=$syval;
6459: }
6460: }
6461: &appenv('request.ambiguous' => $thisfn);
6462: return $env{$cache_str}='';
6463: }
6464:
6465: # ---------------------------------------------------------- Return random seed
6466:
6467: sub numval {
6468: my $txt=shift;
6469: $txt=~tr/A-J/0-9/;
6470: $txt=~tr/a-j/0-9/;
6471: $txt=~tr/K-T/0-9/;
6472: $txt=~tr/k-t/0-9/;
6473: $txt=~tr/U-Z/0-5/;
6474: $txt=~tr/u-z/0-5/;
6475: $txt=~s/\D//g;
6476: if ($_64bit) { if ($txt > 2**32) { return -1; } }
6477: return int($txt);
6478: }
6479:
6480: sub numval2 {
6481: my $txt=shift;
6482: $txt=~tr/A-J/0-9/;
6483: $txt=~tr/a-j/0-9/;
6484: $txt=~tr/K-T/0-9/;
6485: $txt=~tr/k-t/0-9/;
6486: $txt=~tr/U-Z/0-5/;
6487: $txt=~tr/u-z/0-5/;
6488: $txt=~s/\D//g;
6489: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6490: my $total;
6491: foreach my $val (@txts) { $total+=$val; }
6492: if ($_64bit) { if ($total > 2**32) { return -1; } }
6493: return int($total);
6494: }
6495:
6496: sub numval3 {
6497: use integer;
6498: my $txt=shift;
6499: $txt=~tr/A-J/0-9/;
6500: $txt=~tr/a-j/0-9/;
6501: $txt=~tr/K-T/0-9/;
6502: $txt=~tr/k-t/0-9/;
6503: $txt=~tr/U-Z/0-5/;
6504: $txt=~tr/u-z/0-5/;
6505: $txt=~s/\D//g;
6506: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6507: my $total;
6508: foreach my $val (@txts) { $total+=$val; }
6509: if ($_64bit) { $total=(($total<<32)>>32); }
6510: return $total;
6511: }
6512:
6513: sub digest {
6514: my ($data)=@_;
6515: my $digest=&Digest::MD5::md5($data);
6516: my ($a,$b,$c,$d)=unpack("iiii",$digest);
6517: my ($e,$f);
6518: {
6519: use integer;
6520: $e=($a+$b);
6521: $f=($c+$d);
6522: if ($_64bit) {
6523: $e=(($e<<32)>>32);
6524: $f=(($f<<32)>>32);
6525: }
6526: }
6527: if (wantarray) {
6528: return ($e,$f);
6529: } else {
6530: my $g;
6531: {
6532: use integer;
6533: $g=($e+$f);
6534: if ($_64bit) {
6535: $g=(($g<<32)>>32);
6536: }
6537: }
6538: return $g;
6539: }
6540: }
6541:
6542: sub latest_rnd_algorithm_id {
6543: return '64bit5';
6544: }
6545:
6546: sub get_rand_alg {
6547: my ($courseid)=@_;
6548: if (!$courseid) { $courseid=(&whichuser())[1]; }
6549: if ($courseid) {
6550: return $env{"course.$courseid.rndseed"};
6551: }
6552: return &latest_rnd_algorithm_id();
6553: }
6554:
6555: sub validCODE {
6556: my ($CODE)=@_;
6557: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
6558: return 0;
6559: }
6560:
6561: sub getCODE {
6562: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
6563: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
6564: defined($Apache::lonhomework::parsing_a_task) ) &&
6565: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
6566: return $Apache::lonhomework::history{'resource.CODE'};
6567: }
6568: return undef;
6569: }
6570:
6571: sub rndseed {
6572: my ($symb,$courseid,$domain,$username)=@_;
6573:
6574: my ($wsymb,$wcourseid,$wdomain,$wusername)=&whichuser();
6575: if (!$symb) {
6576: unless ($symb=$wsymb) { return time; }
6577: }
6578: if (!$courseid) { $courseid=$wcourseid; }
6579: if (!$domain) { $domain=$wdomain; }
6580: if (!$username) { $username=$wusername }
6581: my $which=&get_rand_alg();
6582: if (defined(&getCODE())) {
6583: if ($which eq '64bit5') {
6584: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
6585: } elsif ($which eq '64bit4') {
6586: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
6587: } else {
6588: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
6589: }
6590: } elsif ($which eq '64bit5') {
6591: return &rndseed_64bit5($symb,$courseid,$domain,$username);
6592: } elsif ($which eq '64bit4') {
6593: return &rndseed_64bit4($symb,$courseid,$domain,$username);
6594: } elsif ($which eq '64bit3') {
6595: return &rndseed_64bit3($symb,$courseid,$domain,$username);
6596: } elsif ($which eq '64bit2') {
6597: return &rndseed_64bit2($symb,$courseid,$domain,$username);
6598: } elsif ($which eq '64bit') {
6599: return &rndseed_64bit($symb,$courseid,$domain,$username);
6600: }
6601: return &rndseed_32bit($symb,$courseid,$domain,$username);
6602: }
6603:
6604: sub rndseed_32bit {
6605: my ($symb,$courseid,$domain,$username)=@_;
6606: {
6607: use integer;
6608: my $symbchck=unpack("%32C*",$symb) << 27;
6609: my $symbseed=numval($symb) << 22;
6610: my $namechck=unpack("%32C*",$username) << 17;
6611: my $nameseed=numval($username) << 12;
6612: my $domainseed=unpack("%32C*",$domain) << 7;
6613: my $courseseed=unpack("%32C*",$courseid);
6614: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
6615: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6616: #&logthis("rndseed :$num:$symb");
6617: if ($_64bit) { $num=(($num<<32)>>32); }
6618: return $num;
6619: }
6620: }
6621:
6622: sub rndseed_64bit {
6623: my ($symb,$courseid,$domain,$username)=@_;
6624: {
6625: use integer;
6626: my $symbchck=unpack("%32S*",$symb) << 21;
6627: my $symbseed=numval($symb) << 10;
6628: my $namechck=unpack("%32S*",$username);
6629:
6630: my $nameseed=numval($username) << 21;
6631: my $domainseed=unpack("%32S*",$domain) << 10;
6632: my $courseseed=unpack("%32S*",$courseid);
6633:
6634: my $num1=$symbchck+$symbseed+$namechck;
6635: my $num2=$nameseed+$domainseed+$courseseed;
6636: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6637: #&logthis("rndseed :$num:$symb");
6638: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6639: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6640: return "$num1,$num2";
6641: }
6642: }
6643:
6644: sub rndseed_64bit2 {
6645: my ($symb,$courseid,$domain,$username)=@_;
6646: {
6647: use integer;
6648: # strings need to be an even # of cahracters long, it it is odd the
6649: # last characters gets thrown away
6650: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6651: my $symbseed=numval($symb) << 10;
6652: my $namechck=unpack("%32S*",$username.' ');
6653:
6654: my $nameseed=numval($username) << 21;
6655: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6656: my $courseseed=unpack("%32S*",$courseid.' ');
6657:
6658: my $num1=$symbchck+$symbseed+$namechck;
6659: my $num2=$nameseed+$domainseed+$courseseed;
6660: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6661: #&logthis("rndseed :$num:$symb");
6662: return "$num1,$num2";
6663: }
6664: }
6665:
6666: sub rndseed_64bit3 {
6667: my ($symb,$courseid,$domain,$username)=@_;
6668: {
6669: use integer;
6670: # strings need to be an even # of cahracters long, it it is odd the
6671: # last characters gets thrown away
6672: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6673: my $symbseed=numval2($symb) << 10;
6674: my $namechck=unpack("%32S*",$username.' ');
6675:
6676: my $nameseed=numval2($username) << 21;
6677: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6678: my $courseseed=unpack("%32S*",$courseid.' ');
6679:
6680: my $num1=$symbchck+$symbseed+$namechck;
6681: my $num2=$nameseed+$domainseed+$courseseed;
6682: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6683: #&logthis("rndseed :$num1:$num2:$_64bit");
6684: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6685:
6686: return "$num1:$num2";
6687: }
6688: }
6689:
6690: sub rndseed_64bit4 {
6691: my ($symb,$courseid,$domain,$username)=@_;
6692: {
6693: use integer;
6694: # strings need to be an even # of cahracters long, it it is odd the
6695: # last characters gets thrown away
6696: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6697: my $symbseed=numval3($symb) << 10;
6698: my $namechck=unpack("%32S*",$username.' ');
6699:
6700: my $nameseed=numval3($username) << 21;
6701: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6702: my $courseseed=unpack("%32S*",$courseid.' ');
6703:
6704: my $num1=$symbchck+$symbseed+$namechck;
6705: my $num2=$nameseed+$domainseed+$courseseed;
6706: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6707: #&logthis("rndseed :$num1:$num2:$_64bit");
6708: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6709:
6710: return "$num1:$num2";
6711: }
6712: }
6713:
6714: sub rndseed_64bit5 {
6715: my ($symb,$courseid,$domain,$username)=@_;
6716: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
6717: return "$num1:$num2";
6718: }
6719:
6720: sub rndseed_CODE_64bit {
6721: my ($symb,$courseid,$domain,$username)=@_;
6722: {
6723: use integer;
6724: my $symbchck=unpack("%32S*",$symb.' ') << 16;
6725: my $symbseed=numval2($symb);
6726: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
6727: my $CODEseed=numval(&getCODE());
6728: my $courseseed=unpack("%32S*",$courseid.' ');
6729: my $num1=$symbseed+$CODEchck;
6730: my $num2=$CODEseed+$courseseed+$symbchck;
6731: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
6732: #&logthis("rndseed :$num1:$num2:$symb");
6733: if ($_64bit) { $num1=(($num1<<32)>>32); }
6734: if ($_64bit) { $num2=(($num2<<32)>>32); }
6735: return "$num1:$num2";
6736: }
6737: }
6738:
6739: sub rndseed_CODE_64bit4 {
6740: my ($symb,$courseid,$domain,$username)=@_;
6741: {
6742: use integer;
6743: my $symbchck=unpack("%32S*",$symb.' ') << 16;
6744: my $symbseed=numval3($symb);
6745: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
6746: my $CODEseed=numval3(&getCODE());
6747: my $courseseed=unpack("%32S*",$courseid.' ');
6748: my $num1=$symbseed+$CODEchck;
6749: my $num2=$CODEseed+$courseseed+$symbchck;
6750: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
6751: #&logthis("rndseed :$num1:$num2:$symb");
6752: if ($_64bit) { $num1=(($num1<<32)>>32); }
6753: if ($_64bit) { $num2=(($num2<<32)>>32); }
6754: return "$num1:$num2";
6755: }
6756: }
6757:
6758: sub rndseed_CODE_64bit5 {
6759: my ($symb,$courseid,$domain,$username)=@_;
6760: my $code = &getCODE();
6761: my ($num1,$num2)=&digest("$symb,$courseid,$code");
6762: return "$num1:$num2";
6763: }
6764:
6765: sub setup_random_from_rndseed {
6766: my ($rndseed)=@_;
6767: if ($rndseed =~/([,:])/) {
6768: my ($num1,$num2)=split(/[,:]/,$rndseed);
6769: &Math::Random::random_set_seed(abs($num1),abs($num2));
6770: } else {
6771: &Math::Random::random_set_seed_from_phrase($rndseed);
6772: }
6773: }
6774:
6775: sub latest_receipt_algorithm_id {
6776: return 'receipt2';
6777: }
6778:
6779: sub recunique {
6780: my $fucourseid=shift;
6781: my $unique;
6782: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
6783: $unique=$env{"course.$fucourseid.internal.encseed"};
6784: } else {
6785: $unique=$perlvar{'lonReceipt'};
6786: }
6787: return unpack("%32C*",$unique);
6788: }
6789:
6790: sub recprefix {
6791: my $fucourseid=shift;
6792: my $prefix;
6793: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
6794: $prefix=$env{"course.$fucourseid.internal.encpref"};
6795: } else {
6796: $prefix=$perlvar{'lonHostID'};
6797: }
6798: return unpack("%32C*",$prefix);
6799: }
6800:
6801: sub ireceipt {
6802: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
6803: my $cuname=unpack("%32C*",$funame);
6804: my $cudom=unpack("%32C*",$fudom);
6805: my $cucourseid=unpack("%32C*",$fucourseid);
6806: my $cusymb=unpack("%32C*",$fusymb);
6807: my $cunique=&recunique($fucourseid);
6808: my $cpart=unpack("%32S*",$part);
6809: my $return =&recprefix($fucourseid).'-';
6810: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
6811: $env{'request.state'} eq 'construct') {
6812: #&logthis("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname)." and ".($cpart%$cudom));
6813:
6814: $return.= ($cunique%$cuname+
6815: $cunique%$cudom+
6816: $cusymb%$cuname+
6817: $cusymb%$cudom+
6818: $cucourseid%$cuname+
6819: $cucourseid%$cudom+
6820: $cpart%$cuname+
6821: $cpart%$cudom);
6822: } else {
6823: $return.= ($cunique%$cuname+
6824: $cunique%$cudom+
6825: $cusymb%$cuname+
6826: $cusymb%$cudom+
6827: $cucourseid%$cuname+
6828: $cucourseid%$cudom);
6829: }
6830: return $return;
6831: }
6832:
6833: sub receipt {
6834: my ($part)=@_;
6835: my ($symb,$courseid,$domain,$name) = &whichuser();
6836: return &ireceipt($name,$domain,$courseid,$symb,$part);
6837: }
6838:
6839: sub whichuser {
6840: my ($passedsymb)=@_;
6841: my ($symb,$courseid,$domain,$name,$publicuser);
6842: if (defined($env{'form.grade_symb'})) {
6843: my ($tmp_courseid)=&get_env_multiple('form.grade_courseid');
6844: my $allowed=&allowed('vgr',$tmp_courseid);
6845: if (!$allowed &&
6846: exists($env{'request.course.sec'}) &&
6847: $env{'request.course.sec'} !~ /^\s*$/) {
6848: $allowed=&allowed('vgr',$tmp_courseid.
6849: '/'.$env{'request.course.sec'});
6850: }
6851: if ($allowed) {
6852: ($symb)=&get_env_multiple('form.grade_symb');
6853: $courseid=$tmp_courseid;
6854: ($domain)=&get_env_multiple('form.grade_domain');
6855: ($name)=&get_env_multiple('form.grade_username');
6856: return ($symb,$courseid,$domain,$name,$publicuser);
6857: }
6858: }
6859: if (!$passedsymb) {
6860: $symb=&symbread();
6861: } else {
6862: $symb=$passedsymb;
6863: }
6864: $courseid=$env{'request.course.id'};
6865: $domain=$env{'user.domain'};
6866: $name=$env{'user.name'};
6867: if ($name eq 'public' && $domain eq 'public') {
6868: if (!defined($env{'form.username'})) {
6869: $env{'form.username'}.=time.rand(10000000);
6870: }
6871: $name.=$env{'form.username'};
6872: }
6873: return ($symb,$courseid,$domain,$name,$publicuser);
6874:
6875: }
6876:
6877: # ------------------------------------------------------------ Serves up a file
6878: # returns either the contents of the file or
6879: # -1 if the file doesn't exist
6880: #
6881: # if the target is a file that was uploaded via DOCS,
6882: # a check will be made to see if a current copy exists on the local server,
6883: # if it does this will be served, otherwise a copy will be retrieved from
6884: # the home server for the course and stored in /home/httpd/html/userfiles on
6885: # the local server.
6886:
6887: sub getfile {
6888: my ($file) = @_;
6889: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
6890: &repcopy($file);
6891: return &readfile($file);
6892: }
6893:
6894: sub repcopy_userfile {
6895: my ($file)=@_;
6896: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
6897: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
6898: my ($cdom,$cnum,$filename) =
6899: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
6900: my ($info,$rtncode);
6901: my $uri="/uploaded/$cdom/$cnum/$filename";
6902: if (-e "$file") {
6903: my @fileinfo = stat($file);
6904: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
6905: if ($lwpresp ne 'ok') {
6906: if ($rtncode eq '404') {
6907: unlink($file);
6908: }
6909: #my $ua=new LWP::UserAgent;
6910: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6911: #my $response=$ua->request($request);
6912: #if ($response->is_success()) {
6913: # return $response->content;
6914: # } else {
6915: # return -1;
6916: # }
6917: return -1;
6918: }
6919: if ($info < $fileinfo[9]) {
6920: return 'ok';
6921: }
6922: $info = '';
6923: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
6924: if ($lwpresp ne 'ok') {
6925: return -1;
6926: }
6927: } else {
6928: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
6929: if ($lwpresp ne 'ok') {
6930: my $ua=new LWP::UserAgent;
6931: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6932: my $response=$ua->request($request);
6933: if ($response->is_success()) {
6934: $info=$response->content;
6935: } else {
6936: return -1;
6937: }
6938: }
6939: my @parts = ($cdom,$cnum);
6940: if ($filename =~ m|^(.+)/[^/]+$|) {
6941: push @parts, split(/\//,$1);
6942: }
6943: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
6944: foreach my $part (@parts) {
6945: $path .= '/'.$part;
6946: if (!-e $path) {
6947: mkdir($path,0770);
6948: }
6949: }
6950: }
6951: open(FILE,">$file");
6952: print FILE $info;
6953: close(FILE);
6954: return 'ok';
6955: }
6956:
6957: sub tokenwrapper {
6958: my $uri=shift;
6959: $uri=~s|^http\://([^/]+)||;
6960: $uri=~s|^/||;
6961: $env{'user.environment'}=~/\/([^\/]+)\.id/;
6962: my $token=$1;
6963: my (undef,$udom,$uname,$file)=split('/',$uri,4);
6964: if ($udom && $uname && $file) {
6965: $file=~s|(\?\.*)*$||;
6966: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
6967: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
6968: (($uri=~/\?/)?'&':'?').'token='.$token.
6969: '&tokenissued='.$perlvar{'lonHostID'};
6970: } else {
6971: return '/adm/notfound.html';
6972: }
6973: }
6974:
6975: sub getuploaded {
6976: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
6977: $uri=~s/^\///;
6978: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
6979: my $ua=new LWP::UserAgent;
6980: my $request=new HTTP::Request($reqtype,$uri);
6981: my $response=$ua->request($request);
6982: $$rtncode = $response->code;
6983: if (! $response->is_success()) {
6984: return 'failed';
6985: }
6986: if ($reqtype eq 'HEAD') {
6987: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
6988: } elsif ($reqtype eq 'GET') {
6989: $$info = $response->content;
6990: }
6991: return 'ok';
6992: }
6993:
6994: sub readfile {
6995: my $file = shift;
6996: if ( (! -e $file ) || ($file eq '') ) { return -1; };
6997: my $fh;
6998: open($fh,"<$file");
6999: my $a='';
7000: while (<$fh>) { $a .=$_; }
7001: return $a;
7002: }
7003:
7004: sub filelocation {
7005: my ($dir,$file) = @_;
7006: my $location;
7007: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
7008:
7009: if ($file =~ m-^/adm/-) {
7010: $file=~s-^/adm/wrapper/-/-;
7011: $file=~s-^/adm/coursedocs/showdoc/-/-;
7012: }
7013: if ($file=~m:^/~:) { # is a contruction space reference
7014: $location = $file;
7015: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
7016: } elsif ($file=~m:^/home/[^/]*/public_html/:) {
7017: # is a correct contruction space reference
7018: $location = $file;
7019: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
7020: my ($udom,$uname,$filename)=
7021: ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
7022: my $home=&homeserver($uname,$udom);
7023: my $is_me=0;
7024: my @ids=¤t_machine_ids();
7025: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
7026: if ($is_me) {
7027: $location=&propath($udom,$uname).
7028: '/userfiles/'.$filename;
7029: } else {
7030: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
7031: $udom.'/'.$uname.'/'.$filename;
7032: }
7033: } else {
7034: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7035: $file=~s:^/res/:/:;
7036: if ( !( $file =~ m:^/:) ) {
7037: $location = $dir. '/'.$file;
7038: } else {
7039: $location = '/home/httpd/html/res'.$file;
7040: }
7041: }
7042: $location=~s://+:/:g; # remove duplicate /
7043: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
7044: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
7045: return $location;
7046: }
7047:
7048: sub hreflocation {
7049: my ($dir,$file)=@_;
7050: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
7051: $file=filelocation($dir,$file);
7052: } elsif ($file=~m-^/adm/-) {
7053: $file=~s-^/adm/wrapper/-/-;
7054: $file=~s-^/adm/coursedocs/showdoc/-/-;
7055: }
7056: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
7057: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
7058: } elsif ($file=~m-/home/(\w+)/public_html/-) {
7059: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
7060: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
7061: $file=~s-^/home/httpd/lonUsers/([^/]*)/./././([^/]*)/userfiles/
7062: -/uploaded/$1/$2/-x;
7063: }
7064: return $file;
7065: }
7066:
7067: sub current_machine_domains {
7068: my $hostname=$hostname{$perlvar{'lonHostID'}};
7069: my @domains;
7070: while( my($id, $name) = each(%hostname)) {
7071: # &logthis("-$id-$name-$hostname-");
7072: if ($hostname eq $name) {
7073: push(@domains,$hostdom{$id});
7074: }
7075: }
7076: return @domains;
7077: }
7078:
7079: sub current_machine_ids {
7080: my $hostname=$hostname{$perlvar{'lonHostID'}};
7081: my @ids;
7082: while( my($id, $name) = each(%hostname)) {
7083: # &logthis("-$id-$name-$hostname-");
7084: if ($hostname eq $name) {
7085: push(@ids,$id);
7086: }
7087: }
7088: return @ids;
7089: }
7090:
7091: # ------------------------------------------------------------- Declutters URLs
7092:
7093: sub declutter {
7094: my $thisfn=shift;
7095: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
7096: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7097: $thisfn=~s/^\///;
7098: $thisfn=~s|^adm/wrapper/||;
7099: $thisfn=~s|^adm/coursedocs/showdoc/||;
7100: $thisfn=~s/^res\///;
7101: $thisfn=~s/\?.+$//;
7102: return $thisfn;
7103: }
7104:
7105: # ------------------------------------------------------------- Clutter up URLs
7106:
7107: sub clutter {
7108: my $thisfn='/'.&declutter(shift);
7109: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
7110: $thisfn='/res'.$thisfn;
7111: }
7112: if ($thisfn !~m|/adm|) {
7113: if ($thisfn =~ m|/ext/|) {
7114: $thisfn='/adm/wrapper'.$thisfn;
7115: } else {
7116: my ($ext) = ($thisfn =~ /\.(\w+)$/);
7117: my $embstyle=&Apache::loncommon::fileembstyle($ext);
7118: if ($embstyle eq 'ssi'
7119: || ($embstyle eq 'hdn')
7120: || ($embstyle eq 'rat')
7121: || ($embstyle eq 'prv')
7122: || ($embstyle eq 'ign')) {
7123: #do nothing with these
7124: } elsif (($embstyle eq 'img')
7125: || ($embstyle eq 'emb')
7126: || ($embstyle eq 'wrp')) {
7127: $thisfn='/adm/wrapper'.$thisfn;
7128: } elsif ($embstyle eq 'unk'
7129: && $thisfn!~/\.(sequence|page)$/) {
7130: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
7131: } else {
7132: # &logthis("Got a blank emb style");
7133: }
7134: }
7135: }
7136: return $thisfn;
7137: }
7138:
7139: sub clutter_with_no_wrapper {
7140: my $uri = &clutter(shift);
7141: if ($uri =~ m-^/adm/-) {
7142: $uri =~ s-^/adm/wrapper/-/-;
7143: $uri =~ s-^/adm/coursedocs/showdoc/-/-;
7144: }
7145: return $uri;
7146: }
7147:
7148: sub freeze_escape {
7149: my ($value)=@_;
7150: if (ref($value)) {
7151: $value=&nfreeze($value);
7152: return '__FROZEN__'.&escape($value);
7153: }
7154: return &escape($value);
7155: }
7156:
7157:
7158: sub thaw_unescape {
7159: my ($value)=@_;
7160: if ($value =~ /^__FROZEN__/) {
7161: substr($value,0,10,undef);
7162: $value=&unescape($value);
7163: return &thaw($value);
7164: }
7165: return &unescape($value);
7166: }
7167:
7168: sub correct_line_ends {
7169: my ($result)=@_;
7170: $$result =~s/\r\n/\n/mg;
7171: $$result =~s/\r/\n/mg;
7172: }
7173: # ================================================================ Main Program
7174:
7175: sub goodbye {
7176: &logthis("Starting Shut down");
7177: #not converted to using infrastruture and probably shouldn't be
7178: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
7179: #converted
7180: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
7181: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
7182: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
7183: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
7184: #1.1 only
7185: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
7186: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
7187: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
7188: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
7189: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
7190: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
7191: &logthis(sprintf("%-20s is %s",'hits',$hits));
7192: &flushcourselogs();
7193: &logthis("Shutting down");
7194: }
7195:
7196: BEGIN {
7197: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
7198: unless ($readit) {
7199: {
7200: my $configvars = LONCAPA::Configuration::read_conf('loncapa.conf');
7201: %perlvar = (%perlvar,%{$configvars});
7202: }
7203:
7204: # ------------------------------------------------------------ Read domain file
7205: {
7206: %domaindescription = ();
7207: %domain_auth_def = ();
7208: %domain_auth_arg_def = ();
7209: my $fh;
7210: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
7211: while (<$fh>) {
7212: next if (/^(\#|\s*$)/);
7213: # next if /^\#/;
7214: chomp;
7215: my ($domain, $domain_description, $def_auth, $def_auth_arg,
7216: $def_lang, $city, $longi, $lati, $primary) = split(/:/,$_);
7217: $domain_auth_def{$domain}=$def_auth;
7218: $domain_auth_arg_def{$domain}=$def_auth_arg;
7219: $domaindescription{$domain}=$domain_description;
7220: $domain_lang_def{$domain}=$def_lang;
7221: $domain_city{$domain}=$city;
7222: $domain_longi{$domain}=$longi;
7223: $domain_lati{$domain}=$lati;
7224: $domain_primary{$domain}=$primary;
7225:
7226: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
7227: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
7228: }
7229: }
7230: close ($fh);
7231: }
7232:
7233:
7234: # ------------------------------------------------------------- Read hosts file
7235: {
7236: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
7237:
7238: while (my $configline=<$config>) {
7239: next if ($configline =~ /^(\#|\s*$)/);
7240: chomp($configline);
7241: my ($id,$domain,$role,$name)=split(/:/,$configline);
7242: $name=~s/\s//g;
7243: if ($id && $domain && $role && $name) {
7244: $hostname{$id}=$name;
7245: $hostdom{$id}=$domain;
7246: if ($role eq 'library') { $libserv{$id}=$name; }
7247: }
7248: }
7249: close($config);
7250: # FIXME: dev server don't want this, production servers _do_ want this
7251: #&get_iphost();
7252: }
7253:
7254: sub get_iphost {
7255: if (%iphost) { return %iphost; }
7256: my %name_to_ip;
7257: foreach my $id (keys(%hostname)) {
7258: my $name=$hostname{$id};
7259: my $ip;
7260: if (!exists($name_to_ip{$name})) {
7261: $ip = gethostbyname($name);
7262: if (!$ip || length($ip) ne 4) {
7263: &logthis("Skipping host $id name $name no IP found\n");
7264: next;
7265: }
7266: $ip=inet_ntoa($ip);
7267: $name_to_ip{$name} = $ip;
7268: } else {
7269: $ip = $name_to_ip{$name};
7270: }
7271: push(@{$iphost{$ip}},$id);
7272: }
7273: return %iphost;
7274: }
7275:
7276: # ------------------------------------------------------ Read spare server file
7277: {
7278: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
7279:
7280: while (my $configline=<$config>) {
7281: chomp($configline);
7282: if ($configline) {
7283: my ($host,$type) = split(':',$configline,2);
7284: if (!defined($type) || $type eq '') { $type = 'default' };
7285: push(@{ $spareid{$type} }, $host);
7286: }
7287: }
7288: close($config);
7289: }
7290: # ------------------------------------------------------------ Read permissions
7291: {
7292: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
7293:
7294: while (my $configline=<$config>) {
7295: chomp($configline);
7296: if ($configline) {
7297: my ($role,$perm)=split(/ /,$configline);
7298: if ($perm ne '') { $pr{$role}=$perm; }
7299: }
7300: }
7301: close($config);
7302: }
7303:
7304: # -------------------------------------------- Read plain texts for permissions
7305: {
7306: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
7307:
7308: while (my $configline=<$config>) {
7309: chomp($configline);
7310: if ($configline) {
7311: my ($short,@plain)=split(/:/,$configline);
7312: %{$prp{$short}} = ();
7313: if (@plain > 0) {
7314: $prp{$short}{'std'} = $plain[0];
7315: for (my $i=1; $i<@plain; $i++) {
7316: $prp{$short}{'alt'.$i} = $plain[$i];
7317: }
7318: }
7319: }
7320: }
7321: close($config);
7322: }
7323:
7324: # ---------------------------------------------------------- Read package table
7325: {
7326: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
7327:
7328: while (my $configline=<$config>) {
7329: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
7330: chomp($configline);
7331: my ($short,$plain)=split(/:/,$configline);
7332: my ($pack,$name)=split(/\&/,$short);
7333: if ($plain ne '') {
7334: $packagetab{$pack.'&'.$name.'&name'}=$name;
7335: $packagetab{$short}=$plain;
7336: }
7337: }
7338: close($config);
7339: }
7340:
7341: # ------------- set up temporary directory
7342: {
7343: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
7344:
7345: }
7346:
7347: $memcache=new Cache::Memcached({'servers' => ['127.0.0.1:11211'],
7348: 'compress_threshold'=> 20_000,
7349: });
7350:
7351: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
7352: $dumpcount=0;
7353:
7354: &logtouch();
7355: &logthis('<font color="yellow">INFO: Read configuration</font>');
7356: $readit=1;
7357: {
7358: use integer;
7359: my $test=(2**32)+1;
7360: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
7361: &logthis(" Detected 64bit platform ($_64bit)");
7362: }
7363: }
7364: }
7365:
7366: 1;
7367: __END__
7368:
7369: =pod
7370:
7371: =head1 NAME
7372:
7373: Apache::lonnet - Subroutines to ask questions about things in the network.
7374:
7375: =head1 SYNOPSIS
7376:
7377: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
7378:
7379: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
7380:
7381: Common parameters:
7382:
7383: =over 4
7384:
7385: =item *
7386:
7387: $uname : an internal username (if $cname expecting a course Id specifically)
7388:
7389: =item *
7390:
7391: $udom : a domain (if $cdom expecting a course's domain specifically)
7392:
7393: =item *
7394:
7395: $symb : a resource instance identifier
7396:
7397: =item *
7398:
7399: $namespace : the name of a .db file that contains the data needed or
7400: being set.
7401:
7402: =back
7403:
7404: =head1 OVERVIEW
7405:
7406: lonnet provides subroutines which interact with the
7407: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
7408: about classes, users, and resources.
7409:
7410: For many of these objects you can also use this to store data about
7411: them or modify them in various ways.
7412:
7413: =head2 Symbs
7414:
7415: To identify a specific instance of a resource, LON-CAPA uses symbols
7416: or "symbs"X<symb>. These identifiers are built from the URL of the
7417: map, the resource number of the resource in the map, and the URL of
7418: the resource itself. The latter is somewhat redundant, but might help
7419: if maps change.
7420:
7421: An example is
7422:
7423: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
7424:
7425: The respective map entry is
7426:
7427: <resource id="19" src="/res/msu/korte/tests/part12.problem"
7428: title="Problem 2">
7429: </resource>
7430:
7431: Symbs are used by the random number generator, as well as to store and
7432: restore data specific to a certain instance of for example a problem.
7433:
7434: =head2 Storing And Retrieving Data
7435:
7436: X<store()>X<cstore()>X<restore()>Three of the most important functions
7437: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
7438: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
7439: is is the non-critical message twin of cstore. These functions are for
7440: handlers to store a perl hash to a user's permanent data space in an
7441: easy manner, and to retrieve it again on another call. It is expected
7442: that a handler would use this once at the beginning to retrieve data,
7443: and then again once at the end to send only the new data back.
7444:
7445: The data is stored in the user's data directory on the user's
7446: homeserver under the ID of the course.
7447:
7448: The hash that is returned by restore will have all of the previous
7449: value for all of the elements of the hash.
7450:
7451: Example:
7452:
7453: #creating a hash
7454: my %hash;
7455: $hash{'foo'}='bar';
7456:
7457: #storing it
7458: &Apache::lonnet::cstore(\%hash);
7459:
7460: #changing a value
7461: $hash{'foo'}='notbar';
7462:
7463: #adding a new value
7464: $hash{'bar'}='foo';
7465: &Apache::lonnet::cstore(\%hash);
7466:
7467: #retrieving the hash
7468: my %history=&Apache::lonnet::restore();
7469:
7470: #print the hash
7471: foreach my $key (sort(keys(%history))) {
7472: print("\%history{$key} = $history{$key}");
7473: }
7474:
7475: Will print out:
7476:
7477: %history{1:foo} = bar
7478: %history{1:keys} = foo:timestamp
7479: %history{1:timestamp} = 990455579
7480: %history{2:bar} = foo
7481: %history{2:foo} = notbar
7482: %history{2:keys} = foo:bar:timestamp
7483: %history{2:timestamp} = 990455580
7484: %history{bar} = foo
7485: %history{foo} = notbar
7486: %history{timestamp} = 990455580
7487: %history{version} = 2
7488:
7489: Note that the special hash entries C<keys>, C<version> and
7490: C<timestamp> were added to the hash. C<version> will be equal to the
7491: total number of versions of the data that have been stored. The
7492: C<timestamp> attribute will be the UNIX time the hash was
7493: stored. C<keys> is available in every historical section to list which
7494: keys were added or changed at a specific historical revision of a
7495: hash.
7496:
7497: B<Warning>: do not store the hash that restore returns directly. This
7498: will cause a mess since it will restore the historical keys as if the
7499: were new keys. I.E. 1:foo will become 1:1:foo etc.
7500:
7501: Calling convention:
7502:
7503: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
7504: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
7505:
7506: For more detailed information, see lonnet specific documentation.
7507:
7508: =head1 RETURN MESSAGES
7509:
7510: =over 4
7511:
7512: =item * B<con_lost>: unable to contact remote host
7513:
7514: =item * B<con_delayed>: unable to contact remote host, message will be delivered
7515: when the connection is brought back up
7516:
7517: =item * B<con_failed>: unable to contact remote host and unable to save message
7518: for later delivery
7519:
7520: =item * B<error:>: an error a occured, a description of the error follows the :
7521:
7522: =item * B<no_such_host>: unable to fund a host associated with the user/domain
7523: that was requested
7524:
7525: =back
7526:
7527: =head1 PUBLIC SUBROUTINES
7528:
7529: =head2 Session Environment Functions
7530:
7531: =over 4
7532:
7533: =item *
7534: X<appenv()>
7535: B<appenv(%hash)>: the value of %hash is written to
7536: the user envirnoment file, and will be restored for each access this
7537: user makes during this session, also modifies the %env for the current
7538: process
7539:
7540: =item *
7541: X<delenv()>
7542: B<delenv($regexp)>: removes all items from the session
7543: environment file that matches the regular expression in $regexp. The
7544: values are also delted from the current processes %env.
7545:
7546: =item * get_env_multiple($name)
7547:
7548: gets $name from the %env hash, it seemlessly handles the cases where multiple
7549: values may be defined and end up as an array ref.
7550:
7551: returns an array of values
7552:
7553: =back
7554:
7555: =head2 User Information
7556:
7557: =over 4
7558:
7559: =item *
7560: X<queryauthenticate()>
7561: B<queryauthenticate($uname,$udom)>: try to determine user's current
7562: authentication scheme
7563:
7564: =item *
7565: X<authenticate()>
7566: B<authenticate($uname,$upass,$udom)>: try to
7567: authenticate user from domain's lib servers (first use the current
7568: one). C<$upass> should be the users password.
7569:
7570: =item *
7571: X<homeserver()>
7572: B<homeserver($uname,$udom)>: find the server which has
7573: the user's directory and files (there must be only one), this caches
7574: the answer, and also caches if there is a borken connection.
7575:
7576: =item *
7577: X<idget()>
7578: B<idget($udom,@ids)>: find the usernames behind a list of IDs
7579: (IDs are a unique resource in a domain, there must be only 1 ID per
7580: username, and only 1 username per ID in a specific domain) (returns
7581: hash: id=>name,id=>name)
7582:
7583: =item *
7584: X<idrget()>
7585: B<idrget($udom,@unames)>: find the IDs behind a list of
7586: usernames (returns hash: name=>id,name=>id)
7587:
7588: =item *
7589: X<idput()>
7590: B<idput($udom,%ids)>: store away a list of names and associated IDs
7591:
7592: =item *
7593: X<rolesinit()>
7594: B<rolesinit($udom,$username,$authhost)>: get user privileges
7595:
7596: =item *
7597: X<getsection()>
7598: B<getsection($udom,$uname,$cname)>: finds the section of student in the
7599: course $cname, return section name/number or '' for "not in course"
7600: and '-1' for "no section"
7601:
7602: =item *
7603: X<userenvironment()>
7604: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
7605: passed in @what from the requested user's environment, returns a hash
7606:
7607: =back
7608:
7609: =head2 User Roles
7610:
7611: =over 4
7612:
7613: =item *
7614:
7615: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
7616: actions
7617: F: full access
7618: U,I,K: authentication modes (cxx only)
7619: '': forbidden
7620: 1: user needs to choose course
7621: 2: browse allowed
7622: A: passphrase authentication needed
7623:
7624: =item *
7625:
7626: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
7627: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
7628: and course level
7629:
7630: =item *
7631:
7632: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
7633: explanation of a user role term
7634:
7635: =back
7636:
7637: =head2 User Modification
7638:
7639: =over 4
7640:
7641: =item *
7642:
7643: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
7644: user for the level given by URL. Optional start and end dates (leave empty
7645: string or zero for "no date")
7646:
7647: =item *
7648:
7649: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
7650: change a users, password, possible return values are: ok,
7651: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
7652: refused
7653:
7654: =item *
7655:
7656: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
7657:
7658: =item *
7659:
7660: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
7661: modify user
7662:
7663: =item *
7664:
7665: modifystudent
7666:
7667: modify a students enrollment and identification information.
7668: The course id is resolved based on the current users environment.
7669: This means the envoking user must be a course coordinator or otherwise
7670: associated with a course.
7671:
7672: This call is essentially a wrapper for lonnet::modifyuser and
7673: lonnet::modify_student_enrollment
7674:
7675: Inputs:
7676:
7677: =over 4
7678:
7679: =item B<$udom> Students loncapa domain
7680:
7681: =item B<$uname> Students loncapa login name
7682:
7683: =item B<$uid> Students id/student number
7684:
7685: =item B<$umode> Students authentication mode
7686:
7687: =item B<$upass> Students password
7688:
7689: =item B<$first> Students first name
7690:
7691: =item B<$middle> Students middle name
7692:
7693: =item B<$last> Students last name
7694:
7695: =item B<$gene> Students generation
7696:
7697: =item B<$usec> Students section in course
7698:
7699: =item B<$end> Unix time of the roles expiration
7700:
7701: =item B<$start> Unix time of the roles start date
7702:
7703: =item B<$forceid> If defined, allow $uid to be changed
7704:
7705: =item B<$desiredhome> server to use as home server for student
7706:
7707: =back
7708:
7709: =item *
7710:
7711: modify_student_enrollment
7712:
7713: Change a students enrollment status in a class. The environment variable
7714: 'role.request.course' must be defined for this function to proceed.
7715:
7716: Inputs:
7717:
7718: =over 4
7719:
7720: =item $udom, students domain
7721:
7722: =item $uname, students name
7723:
7724: =item $uid, students user id
7725:
7726: =item $first, students first name
7727:
7728: =item $middle
7729:
7730: =item $last
7731:
7732: =item $gene
7733:
7734: =item $usec
7735:
7736: =item $end
7737:
7738: =item $start
7739:
7740: =back
7741:
7742:
7743: =item *
7744:
7745: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
7746: custom role; give a custom role to a user for the level given by URL. Specify
7747: name and domain of role author, and role name
7748:
7749: =item *
7750:
7751: revokerole($udom,$uname,$url,$role) : revoke a role for url
7752:
7753: =item *
7754:
7755: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
7756:
7757: =back
7758:
7759: =head2 Course Infomation
7760:
7761: =over 4
7762:
7763: =item *
7764:
7765: coursedescription($courseid) : returns a hash of information about the
7766: specified course id, including all environment settings for the
7767: course, the description of the course will be in the hash under the
7768: key 'description'
7769:
7770: =item *
7771:
7772: resdata($name,$domain,$type,@which) : request for current parameter
7773: setting for a specific $type, where $type is either 'course' or 'user',
7774: @what should be a list of parameters to ask about. This routine caches
7775: answers for 5 minutes.
7776:
7777: =back
7778:
7779: =head2 Course Modification
7780:
7781: =over 4
7782:
7783: =item *
7784:
7785: writecoursepref($courseid,%prefs) : write preferences (environment
7786: database) for a course
7787:
7788: =item *
7789:
7790: createcourse($udom,$description,$url) : make/modify course
7791:
7792: =back
7793:
7794: =head2 Resource Subroutines
7795:
7796: =over 4
7797:
7798: =item *
7799:
7800: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
7801:
7802: =item *
7803:
7804: repcopy($filename) : subscribes to the requested file, and attempts to
7805: replicate from the owning library server, Might return
7806: 'unavailable', 'not_found', 'forbidden', 'ok', or
7807: 'bad_request', also attempts to grab the metadata for the
7808: resource. Expects the local filesystem pathname
7809: (/home/httpd/html/res/....)
7810:
7811: =back
7812:
7813: =head2 Resource Information
7814:
7815: =over 4
7816:
7817: =item *
7818:
7819: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
7820: a vairety of different possible values, $varname should be a request
7821: string, and the other parameters can be used to specify who and what
7822: one is asking about.
7823:
7824: Possible values for $varname are environment.lastname (or other item
7825: from the envirnment hash), user.name (or someother aspect about the
7826: user), resource.0.maxtries (or some other part and parameter of a
7827: resource)
7828:
7829: =item *
7830:
7831: directcondval($number) : get current value of a condition; reads from a state
7832: string
7833:
7834: =item *
7835:
7836: condval($condidx) : value of condition index based on state
7837:
7838: =item *
7839:
7840: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
7841: resource's metadata, $what should be either a specific key, or either
7842: 'keys' (to get a list of possible keys) or 'packages' to get a list of
7843: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
7844:
7845: this function automatically caches all requests
7846:
7847: =item *
7848:
7849: metadata_query($query,$custom,$customshow) : make a metadata query against the
7850: network of library servers; returns file handle of where SQL and regex results
7851: will be stored for query
7852:
7853: =item *
7854:
7855: symbread($filename) : return symbolic list entry (filename argument optional);
7856: returns the data handle
7857:
7858: =item *
7859:
7860: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
7861: a possible symb for the URL in $thisfn, and if is an encryypted
7862: resource that the user accessed using /enc/ returns a 1 on success, 0
7863: on failure, user must be in a course, as it assumes the existance of
7864: the course initial hash, and uses $env('request.course.id'}
7865:
7866:
7867: =item *
7868:
7869: symbclean($symb) : removes versions numbers from a symb, returns the
7870: cleaned symb
7871:
7872: =item *
7873:
7874: is_on_map($uri) : checks if the $uri is somewhere on the current
7875: course map, user must be in a course for it to work.
7876:
7877: =item *
7878:
7879: numval($salt) : return random seed value (addend for rndseed)
7880:
7881: =item *
7882:
7883: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
7884: a random seed, all arguments are optional, if they aren't sent it uses the
7885: environment to derive them. Note: if symb isn't sent and it can't get one
7886: from &symbread it will use the current time as its return value
7887:
7888: =item *
7889:
7890: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
7891: unfakeable, receipt
7892:
7893: =item *
7894:
7895: receipt() : API to ireceipt working off of env values; given out to users
7896:
7897: =item *
7898:
7899: countacc($url) : count the number of accesses to a given URL
7900:
7901: =item *
7902:
7903: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
7904:
7905: =item *
7906:
7907: checkin($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 $tcrsid)
7908:
7909: =item *
7910:
7911: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
7912:
7913: =item *
7914:
7915: devalidate($symb) : devalidate temporary spreadsheet calculations,
7916: forcing spreadsheet to reevaluate the resource scores next time.
7917:
7918: =back
7919:
7920: =head2 Storing/Retreiving Data
7921:
7922: =over 4
7923:
7924: =item *
7925:
7926: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
7927: for this url; hashref needs to be given and should be a \%hashname; the
7928: remaining args aren't required and if they aren't passed or are '' they will
7929: be derived from the env
7930:
7931: =item *
7932:
7933: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
7934: uses critical subroutine
7935:
7936: =item *
7937:
7938: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
7939: all args are optional
7940:
7941: =item *
7942:
7943: dumpstore($namespace,$udom,$uname,$regexp,$range) :
7944: dumps the complete (or key matching regexp) namespace into a hash
7945: ($udom, $uname, $regexp, $range are optional) for a namespace that is
7946: normally &store()ed into
7947:
7948: $range should be either an integer '100' (give me the first 100
7949: matching records)
7950: or be two integers sperated by a - with no spaces
7951: '30-50' (give me the 30th through the 50th matching
7952: records)
7953:
7954:
7955: =item *
7956:
7957: putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
7958: replaces a &store() version of data with a replacement set of data
7959: for a particular resource in a namespace passed in the $storehash hash
7960: reference
7961:
7962: =item *
7963:
7964: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
7965: works very similar to store/cstore, but all data is stored in a
7966: temporary location and can be reset using tmpreset, $storehash should
7967: be a hash reference, returns nothing on success
7968:
7969: =item *
7970:
7971: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
7972: similar to restore, but all data is stored in a temporary location and
7973: can be reset using tmpreset. Returns a hash of values on success,
7974: error string otherwise.
7975:
7976: =item *
7977:
7978: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
7979: deltes all keys for $symb form the temporary storage hash.
7980:
7981: =item *
7982:
7983: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7984: reference filled in from namesp ($udom and $uname are optional)
7985:
7986: =item *
7987:
7988: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
7989: namesp ($udom and $uname are optional)
7990:
7991: =item *
7992:
7993: dump($namespace,$udom,$uname,$regexp,$range) :
7994: dumps the complete (or key matching regexp) namespace into a hash
7995: ($udom, $uname, $regexp, $range are optional)
7996:
7997: $range should be either an integer '100' (give me the first 100
7998: matching records)
7999: or be two integers sperated by a - with no spaces
8000: '30-50' (give me the 30th through the 50th matching
8001: records)
8002: =item *
8003:
8004: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
8005: $store can be a scalar, an array reference, or if the amount to be
8006: incremented is > 1, a hash reference.
8007:
8008: ($udom and $uname are optional)
8009:
8010: =item *
8011:
8012: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
8013: ($udom and $uname are optional)
8014:
8015: =item *
8016:
8017: cput($namespace,$storehash,$udom,$uname) : critical put
8018: ($udom and $uname are optional)
8019:
8020: =item *
8021:
8022: newput($namespace,$storehash,$udom,$uname) :
8023:
8024: Attempts to store the items in the $storehash, but only if they don't
8025: currently exist, if this succeeds you can be certain that you have
8026: successfully created a new key value pair in the $namespace db.
8027:
8028:
8029: Args:
8030: $namespace: name of database to store values to
8031: $storehash: hashref to store to the db
8032: $udom: (optional) domain of user containing the db
8033: $uname: (optional) name of user caontaining the db
8034:
8035: Returns:
8036: 'ok' -> succeeded in storing all keys of $storehash
8037: 'key_exists: <key>' -> failed to anything out of $storehash, as at
8038: least <key> already existed in the db (other
8039: requested keys may also already exist)
8040: 'error: <msg>' -> unable to tie the DB or other erorr occured
8041: 'con_lost' -> unable to contact request server
8042: 'refused' -> action was not allowed by remote machine
8043:
8044:
8045: =item *
8046:
8047: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
8048: reference filled in from namesp (encrypts the return communication)
8049: ($udom and $uname are optional)
8050:
8051: =item *
8052:
8053: log($udom,$name,$home,$message) : write to permanent log for user; use
8054: critical subroutine
8055:
8056: =back
8057:
8058: =head2 Network Status Functions
8059:
8060: =over 4
8061:
8062: =item *
8063:
8064: dirlist($uri) : return directory list based on URI
8065:
8066: =item *
8067:
8068: spareserver() : find server with least workload from spare.tab
8069:
8070: =back
8071:
8072: =head2 Apache Request
8073:
8074: =over 4
8075:
8076: =item *
8077:
8078: ssi($url,%hash) : server side include, does a complete request cycle on url to
8079: localhost, posts hash
8080:
8081: =back
8082:
8083: =head2 Data to String to Data
8084:
8085: =over 4
8086:
8087: =item *
8088:
8089: hash2str(%hash) : convert a hash into a string complete with escaping and '='
8090: and '&' separators, supports elements that are arrayrefs and hashrefs
8091:
8092: =item *
8093:
8094: hashref2str($hashref) : convert a hashref into a string complete with
8095: escaping and '=' and '&' separators, supports elements that are
8096: arrayrefs and hashrefs
8097:
8098: =item *
8099:
8100: arrayref2str($arrayref) : convert an arrayref into a string complete
8101: with escaping and '&' separators, supports elements that are arrayrefs
8102: and hashrefs
8103:
8104: =item *
8105:
8106: str2hash($string) : convert string to hash using unescaping and
8107: splitting on '=' and '&', supports elements that are arrayrefs and
8108: hashrefs
8109:
8110: =item *
8111:
8112: str2array($string) : convert string to hash using unescaping and
8113: splitting on '&', supports elements that are arrayrefs and hashrefs
8114:
8115: =back
8116:
8117: =head2 Logging Routines
8118:
8119: =over 4
8120:
8121: These routines allow one to make log messages in the lonnet.log and
8122: lonnet.perm logfiles.
8123:
8124: =item *
8125:
8126: logtouch() : make sure the logfile, lonnet.log, exists
8127:
8128: =item *
8129:
8130: logthis() : append message to the normal lonnet.log file, it gets
8131: preiodically rolled over and deleted.
8132:
8133: =item *
8134:
8135: logperm() : append a permanent message to lonnet.perm.log, this log
8136: file never gets deleted by any automated portion of the system, only
8137: messages of critical importance should go in here.
8138:
8139: =back
8140:
8141: =head2 General File Helper Routines
8142:
8143: =over 4
8144:
8145: =item *
8146:
8147: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
8148: (a) files in /uploaded
8149: (i) If a local copy of the file exists -
8150: compares modification date of local copy with last-modified date for
8151: definitive version stored on home server for course. If local copy is
8152: stale, requests a new version from the home server and stores it.
8153: If the original has been removed from the home server, then local copy
8154: is unlinked.
8155: (ii) If local copy does not exist -
8156: requests the file from the home server and stores it.
8157:
8158: If $caller is 'uploadrep':
8159: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
8160: for request for files originally uploaded via DOCS.
8161: - returns 'ok' if fresh local copy now available, -1 otherwise.
8162:
8163: Otherwise:
8164: This indicates a call from the content generation phase of the request.
8165: - returns the entire contents of the file or -1.
8166:
8167: (b) files in /res
8168: - returns the entire contents of a file or -1;
8169: it properly subscribes to and replicates the file if neccessary.
8170:
8171:
8172: =item *
8173:
8174: stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
8175: reference
8176:
8177: returns either a stat() list of data about the file or an empty list
8178: if the file doesn't exist or couldn't find out about it (connection
8179: problems or user unknown)
8180:
8181: =item *
8182:
8183: filelocation($dir,$file) : returns file system location of a file
8184: based on URI; meant to be "fairly clean" absolute reference, $dir is a
8185: directory that relative $file lookups are to looked in ($dir of /a/dir
8186: and a file of ../bob will become /a/bob)
8187:
8188: =item *
8189:
8190: hreflocation($dir,$file) : returns file system location or a URL; same as
8191: filelocation except for hrefs
8192:
8193: =item *
8194:
8195: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
8196:
8197: =back
8198:
8199: =head2 Usererfile file routines (/uploaded*)
8200:
8201: =over 4
8202:
8203: =item *
8204:
8205: userfileupload(): main rotine for putting a file in a user or course's
8206: filespace, arguments are,
8207:
8208: formname - required - this is the name of the element in $env where the
8209: filename, and the contents of the file to create/modifed exist
8210: the filename is in $env{'form.'.$formname.'.filename'} and the
8211: contents of the file is located in $env{'form.'.$formname}
8212: coursedoc - if true, store the file in the course of the active role
8213: of the current user
8214: subdir - required - subdirectory to put the file in under ../userfiles/
8215: if undefined, it will be placed in "unknown"
8216:
8217: (This routine calls clean_filename() to remove any dangerous
8218: characters from the filename, and then calls finuserfileupload() to
8219: complete the transaction)
8220:
8221: returns either the url of the uploaded file (/uploaded/....) if successful
8222: and /adm/notfound.html if unsuccessful
8223:
8224: =item *
8225:
8226: clean_filename(): routine for cleaing a filename up for storage in
8227: userfile space, argument is:
8228:
8229: filename - proposed filename
8230:
8231: returns: the new clean filename
8232:
8233: =item *
8234:
8235: finishuserfileupload(): routine that creaes and sends the file to
8236: userspace, probably shouldn't be called directly
8237:
8238: docuname: username or courseid of destination for the file
8239: docudom: domain of user/course of destination for the file
8240: formname: same as for userfileupload()
8241: fname: filename (inculding subdirectories) for the file
8242:
8243: returns either the url of the uploaded file (/uploaded/....) if successful
8244: and /adm/notfound.html if unsuccessful
8245:
8246: =item *
8247:
8248: renameuserfile(): renames an existing userfile to a new name
8249:
8250: Args:
8251: docuname: username or courseid of destination for the file
8252: docudom: domain of user/course of destination for the file
8253: old: current file name (including any subdirs under userfiles)
8254: new: desired file name (including any subdirs under userfiles)
8255:
8256: =item *
8257:
8258: mkdiruserfile(): creates a directory is a userfiles dir
8259:
8260: Args:
8261: docuname: username or courseid of destination for the file
8262: docudom: domain of user/course of destination for the file
8263: dir: dir to create (including any subdirs under userfiles)
8264:
8265: =item *
8266:
8267: removeuserfile(): removes a file that exists in userfiles
8268:
8269: Args:
8270: docuname: username or courseid of destination for the file
8271: docudom: domain of user/course of destination for the file
8272: fname: filname to delete (including any subdirs under userfiles)
8273:
8274: =item *
8275:
8276: removeuploadedurl(): convience function for removeuserfile()
8277:
8278: Args:
8279: url: a full /uploaded/... url to delete
8280:
8281: =item *
8282:
8283: get_portfile_permissions():
8284: Args:
8285: domain: domain of user or course contain the portfolio files
8286: user: name of user or num of course contain the portfolio files
8287: Returns:
8288: hashref of a dump of the proper file_permissions.db
8289:
8290:
8291: =item *
8292:
8293: get_access_controls():
8294:
8295: Args:
8296: current_permissions: the hash ref returned from get_portfile_permissions()
8297: group: (optional) the group you want the files associated with
8298: file: (optional) the file you want access info on
8299:
8300: Returns:
8301: a hash (keys are file names) of hashes containing
8302: keys are: path to file/file_name\0uniqueID:scope_end_start (see below)
8303: values are XML containing access control settings (see below)
8304:
8305: Internal notes:
8306:
8307: access controls are stored in file_permissions.db as key=value pairs.
8308: key -> path to file/file_name\0uniqueID:scope_end_start
8309: where scope -> public,guest,course,group,domains or users.
8310: end -> UNIX time for end of access (0 -> no end date)
8311: start -> UNIX time for start of access
8312:
8313: value -> XML description of access control
8314: <scope type=""> (type =1 of: public,guest,course,group,domains,users">
8315: <start></start>
8316: <end></end>
8317:
8318: <password></password> for scope type = guest
8319:
8320: <domain></domain> for scope type = course or group
8321: <number></number>
8322: <roles id="">
8323: <role></role>
8324: <access></access>
8325: <section></section>
8326: <group></group>
8327: </roles>
8328:
8329: <dom></dom> for scope type = domains
8330:
8331: <users> for scope type = users
8332: <user>
8333: <uname></uname>
8334: <udom></udom>
8335: </user>
8336: </users>
8337: </scope>
8338:
8339: Access data is also aggregated for each file in an additional key=value pair:
8340: key -> path to file/file_name\0accesscontrol
8341: value -> reference to hash
8342: hash contains key = value pairs
8343: where key = uniqueID:scope_end_start
8344: value = UNIX time record was last updated
8345:
8346: Used to improve speed of look-ups of access controls for each file.
8347:
8348: Locks on files (resulting from submission of portfolio file to a homework problem stored in array of arrays.
8349:
8350: modify_access_controls():
8351:
8352: Modifies access controls for a portfolio file
8353: Args
8354: 1. file name
8355: 2. reference to hash of required changes,
8356: 3. domain
8357: 4. username
8358: where domain,username are the domain of the portfolio owner
8359: (either a user or a course)
8360:
8361: Returns:
8362: 1. result of additions or updates ('ok' or 'error', with error message).
8363: 2. result of deletions ('ok' or 'error', with error message).
8364: 3. reference to hash of any new or updated access controls.
8365: 4. reference to hash used to map incoming IDs to uniqueIDs assigned to control.
8366: key = integer (inbound ID)
8367: value = uniqueID
8368:
8369: =back
8370:
8371: =head2 HTTP Helper Routines
8372:
8373: =over 4
8374:
8375: =item *
8376:
8377: escape() : unpack non-word characters into CGI-compatible hex codes
8378:
8379: =item *
8380:
8381: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
8382:
8383: =back
8384:
8385: =head1 PRIVATE SUBROUTINES
8386:
8387: =head2 Underlying communication routines (Shouldn't call)
8388:
8389: =over 4
8390:
8391: =item *
8392:
8393: subreply() : tries to pass a message to lonc, returns con_lost if incapable
8394:
8395: =item *
8396:
8397: reply() : uses subreply to send a message to remote machine, logs all failures
8398:
8399: =item *
8400:
8401: critical() : passes a critical message to another server; if cannot
8402: get through then place message in connection buffer directory and
8403: returns con_delayed, if incapable of saving message, returns
8404: con_failed
8405:
8406: =item *
8407:
8408: reconlonc() : tries to reconnect lonc client processes.
8409:
8410: =back
8411:
8412: =head2 Resource Access Logging
8413:
8414: =over 4
8415:
8416: =item *
8417:
8418: flushcourselogs() : flush (save) buffer logs and access logs
8419:
8420: =item *
8421:
8422: courselog($what) : save message for course in hash
8423:
8424: =item *
8425:
8426: courseacclog($what) : save message for course using &courselog(). Perform
8427: special processing for specific resource types (problems, exams, quizzes, etc).
8428:
8429: =item *
8430:
8431: goodbye() : flush course logs and log shutting down; it is called in srm.conf
8432: as a PerlChildExitHandler
8433:
8434: =back
8435:
8436: =head2 Other
8437:
8438: =over 4
8439:
8440: =item *
8441:
8442: symblist($mapname,%newhash) : update symbolic storage links
8443:
8444: =back
8445:
8446: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonnet.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / lonnet / perl