1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.794 2006/10/17 05:56:46 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: =pod
417:
418: =item * get_env_multiple($name)
419:
420: gets $name from the %env hash, it seemlessly handles the cases where multiple
421: values may be defined and end up as an array ref.
422:
423: returns an array of values
424:
425: =cut
426:
427: sub get_env_multiple {
428: my ($name) = @_;
429: my @values;
430: if (defined($env{$name})) {
431: # exists is it an array
432: if (ref($env{$name})) {
433: @values=@{ $env{$name} };
434: } else {
435: $values[0]=$env{$name};
436: }
437: }
438: return(@values);
439: }
440:
441: # ------------------------------------------ Find out current server userload
442: # there is a copy in lond
443: sub userload {
444: my $numusers=0;
445: {
446: opendir(LONIDS,$perlvar{'lonIDsDir'});
447: my $filename;
448: my $curtime=time;
449: while ($filename=readdir(LONIDS)) {
450: if ($filename eq '.' || $filename eq '..') {next;}
451: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
452: if ($curtime-$mtime < 1800) { $numusers++; }
453: }
454: closedir(LONIDS);
455: }
456: my $userloadpercent=0;
457: my $maxuserload=$perlvar{'lonUserLoadLim'};
458: if ($maxuserload) {
459: $userloadpercent=100*$numusers/$maxuserload;
460: }
461: $userloadpercent=sprintf("%.2f",$userloadpercent);
462: return $userloadpercent;
463: }
464:
465: # ------------------------------------------ Fight off request when overloaded
466:
467: sub overloaderror {
468: my ($r,$checkserver)=@_;
469: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
470: my $loadavg;
471: if ($checkserver eq $perlvar{'lonHostID'}) {
472: open(my $loadfile,'/proc/loadavg');
473: $loadavg=<$loadfile>;
474: $loadavg =~ s/\s.*//g;
475: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
476: close($loadfile);
477: } else {
478: $loadavg=&reply('load',$checkserver);
479: }
480: my $overload=$loadavg-100;
481: if ($overload>0) {
482: $r->err_headers_out->{'Retry-After'}=$overload;
483: $r->log_error('Overload of '.$overload.' on '.$checkserver);
484: return 413;
485: }
486: return '';
487: }
488:
489: # ------------------------------ Find server with least workload from spare.tab
490:
491: sub spareserver {
492: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
493: my $spare_server;
494: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
495: my $lowest_load=($loadpercent > $userloadpercent) ? $loadpercent
496: : $userloadpercent;
497:
498: foreach my $try_server (@{ $spareid{'primary'} }) {
499: ($spare_server, $lowest_load) =
500: &compare_server_load($try_server, $spare_server, $lowest_load);
501: }
502:
503: my $found_server = ($spare_server ne '' && $lowest_load < 100);
504:
505: if (!$found_server) {
506: foreach my $try_server (@{ $spareid{'default'} }) {
507: ($spare_server, $lowest_load) =
508: &compare_server_load($try_server, $spare_server, $lowest_load);
509: }
510: }
511:
512: if (!$want_server_name) {
513: $spare_server="http://$hostname{$spare_server}";
514: }
515: return $spare_server;
516: }
517:
518: sub compare_server_load {
519: my ($try_server, $spare_server, $lowest_load) = @_;
520:
521: my $loadans = &reply('load', $try_server);
522: my $userloadans = &reply('userload',$try_server);
523:
524: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
525: next; #didn't get a number from the server
526: }
527:
528: my $load;
529: if ($loadans =~ /\d/) {
530: if ($userloadans =~ /\d/) {
531: #both are numbers, pick the bigger one
532: $load = ($loadans > $userloadans) ? $loadans
533: : $userloadans;
534: } else {
535: $load = $loadans;
536: }
537: } else {
538: $load = $userloadans;
539: }
540:
541: if (($load =~ /\d/) && ($load < $lowest_load)) {
542: $spare_server = $try_server;
543: $lowest_load = $load;
544: }
545: return ($spare_server,$lowest_load);
546: }
547: # --------------------------------------------- Try to change a user's password
548:
549: sub changepass {
550: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
551: $currentpass = &escape($currentpass);
552: $newpass = &escape($newpass);
553: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
554: $server);
555: if (! $answer) {
556: &logthis("No reply on password change request to $server ".
557: "by $uname in domain $udom.");
558: } elsif ($answer =~ "^ok") {
559: &logthis("$uname in $udom successfully changed their password ".
560: "on $server.");
561: } elsif ($answer =~ "^pwchange_failure") {
562: &logthis("$uname in $udom was unable to change their password ".
563: "on $server. The action was blocked by either lcpasswd ".
564: "or pwchange");
565: } elsif ($answer =~ "^non_authorized") {
566: &logthis("$uname in $udom did not get their password correct when ".
567: "attempting to change it on $server.");
568: } elsif ($answer =~ "^auth_mode_error") {
569: &logthis("$uname in $udom attempted to change their password despite ".
570: "not being locally or internally authenticated on $server.");
571: } elsif ($answer =~ "^unknown_user") {
572: &logthis("$uname in $udom attempted to change their password ".
573: "on $server but were unable to because $server is not ".
574: "their home server.");
575: } elsif ($answer =~ "^refused") {
576: &logthis("$server refused to change $uname in $udom password because ".
577: "it was sent an unencrypted request to change the password.");
578: }
579: return $answer;
580: }
581:
582: # ----------------------- Try to determine user's current authentication scheme
583:
584: sub queryauthenticate {
585: my ($uname,$udom)=@_;
586: my $uhome=&homeserver($uname,$udom);
587: if (!$uhome) {
588: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
589: return 'no_host';
590: }
591: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
592: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
593: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
594: }
595: return $answer;
596: }
597:
598: # --------- Try to authenticate user from domain's lib servers (first this one)
599:
600: sub authenticate {
601: my ($uname,$upass,$udom)=@_;
602: $upass=escape($upass);
603: $uname=~s/\W//g;
604: my $uhome=&homeserver($uname,$udom);
605: if (!$uhome) {
606: &logthis("User $uname at $udom is unknown in authenticate");
607: return 'no_host';
608: }
609: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
610: if ($answer eq 'authorized') {
611: &logthis("User $uname at $udom authorized by $uhome");
612: return $uhome;
613: }
614: if ($answer eq 'non_authorized') {
615: &logthis("User $uname at $udom rejected by $uhome");
616: return 'no_host';
617: }
618: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
619: return 'no_host';
620: }
621:
622: # ---------------------- Find the homebase for a user from domain's lib servers
623:
624: my %homecache;
625: sub homeserver {
626: my ($uname,$udom,$ignoreBadCache)=@_;
627: my $index="$uname:$udom";
628:
629: if (exists($homecache{$index})) { return $homecache{$index}; }
630: my $tryserver;
631: foreach $tryserver (keys %libserv) {
632: next if ($ignoreBadCache ne 'true' &&
633: exists($badServerCache{$tryserver}));
634: if ($hostdom{$tryserver} eq $udom) {
635: my $answer=reply("home:$udom:$uname",$tryserver);
636: if ($answer eq 'found') {
637: return $homecache{$index}=$tryserver;
638: } elsif ($answer eq 'no_host') {
639: $badServerCache{$tryserver}=1;
640: }
641: }
642: }
643: return 'no_host';
644: }
645:
646: # ------------------------------------- Find the usernames behind a list of IDs
647:
648: sub idget {
649: my ($udom,@ids)=@_;
650: my %returnhash=();
651:
652: my $tryserver;
653: foreach $tryserver (keys %libserv) {
654: if ($hostdom{$tryserver} eq $udom) {
655: my $idlist=join('&',@ids);
656: $idlist=~tr/A-Z/a-z/;
657: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
658: my @answer=();
659: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
660: @answer=split(/\&/,$reply);
661: } ;
662: my $i;
663: for ($i=0;$i<=$#ids;$i++) {
664: if ($answer[$i]) {
665: $returnhash{$ids[$i]}=$answer[$i];
666: }
667: }
668: }
669: }
670: return %returnhash;
671: }
672:
673: # ------------------------------------- Find the IDs behind a list of usernames
674:
675: sub idrget {
676: my ($udom,@unames)=@_;
677: my %returnhash=();
678: foreach (@unames) {
679: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
680: }
681: return %returnhash;
682: }
683:
684: # ------------------------------- Store away a list of names and associated IDs
685:
686: sub idput {
687: my ($udom,%ids)=@_;
688: my %servers=();
689: foreach (keys %ids) {
690: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
691: my $uhom=&homeserver($_,$udom);
692: if ($uhom ne 'no_host') {
693: my $id=&escape($ids{$_});
694: $id=~tr/A-Z/a-z/;
695: my $unam=&escape($_);
696: if ($servers{$uhom}) {
697: $servers{$uhom}.='&'.$id.'='.$unam;
698: } else {
699: $servers{$uhom}=$id.'='.$unam;
700: }
701: }
702: }
703: foreach (keys %servers) {
704: &critical('idput:'.$udom.':'.$servers{$_},$_);
705: }
706: }
707:
708: # --------------------------------------------------- Assign a key to a student
709:
710: sub assign_access_key {
711: #
712: # a valid key looks like uname:udom#comments
713: # comments are being appended
714: #
715: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
716: $kdom=
717: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
718: $knum=
719: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
720: $cdom=
721: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
722: $cnum=
723: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
724: $udom=$env{'user.name'} unless (defined($udom));
725: $uname=$env{'user.domain'} unless (defined($uname));
726: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
727: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
728: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
729: # assigned to this person
730: # - this should not happen,
731: # unless something went wrong
732: # the first time around
733: # ready to assign
734: $logentry=$1.'; '.$logentry;
735: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
736: $kdom,$knum) eq 'ok') {
737: # key now belongs to user
738: my $envkey='key.'.$cdom.'_'.$cnum;
739: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
740: &appenv('environment.'.$envkey => $ckey);
741: return 'ok';
742: } else {
743: return
744: 'error: Count not permanently assign key, will need to be re-entered later.';
745: }
746: } else {
747: return 'error: Could not assign key, try again later.';
748: }
749: } elsif (!$existing{$ckey}) {
750: # the key does not exist
751: return 'error: The key does not exist';
752: } else {
753: # the key is somebody else's
754: return 'error: The key is already in use';
755: }
756: }
757:
758: # ------------------------------------------ put an additional comment on a key
759:
760: sub comment_access_key {
761: #
762: # a valid key looks like uname:udom#comments
763: # comments are being appended
764: #
765: my ($ckey,$cdom,$cnum,$logentry)=@_;
766: $cdom=
767: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
768: $cnum=
769: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
770: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
771: if ($existing{$ckey}) {
772: $existing{$ckey}.='; '.$logentry;
773: # ready to assign
774: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
775: $cdom,$cnum) eq 'ok') {
776: return 'ok';
777: } else {
778: return 'error: Count not store comment.';
779: }
780: } else {
781: # the key does not exist
782: return 'error: The key does not exist';
783: }
784: }
785:
786: # ------------------------------------------------------ Generate a set of keys
787:
788: sub generate_access_keys {
789: my ($number,$cdom,$cnum,$logentry)=@_;
790: $cdom=
791: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
792: $cnum=
793: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
794: unless (&allowed('mky',$cdom)) { return 0; }
795: unless (($cdom) && ($cnum)) { return 0; }
796: if ($number>10000) { return 0; }
797: sleep(2); # make sure don't get same seed twice
798: srand(time()^($$+($$<<15))); # from "Programming Perl"
799: my $total=0;
800: for (my $i=1;$i<=$number;$i++) {
801: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
802: sprintf("%lx",int(100000*rand)).'-'.
803: sprintf("%lx",int(100000*rand));
804: $newkey=~s/1/g/g; # folks mix up 1 and l
805: $newkey=~s/0/h/g; # and also 0 and O
806: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
807: if ($existing{$newkey}) {
808: $i--;
809: } else {
810: if (&put('accesskeys',
811: { $newkey => '# generated '.localtime().
812: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
813: '; '.$logentry },
814: $cdom,$cnum) eq 'ok') {
815: $total++;
816: }
817: }
818: }
819: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
820: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
821: return $total;
822: }
823:
824: # ------------------------------------------------------- Validate an accesskey
825:
826: sub validate_access_key {
827: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
828: $cdom=
829: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
830: $cnum=
831: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
832: $udom=$env{'user.domain'} unless (defined($udom));
833: $uname=$env{'user.name'} unless (defined($uname));
834: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
835: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
836: }
837:
838: # ------------------------------------- Find the section of student in a course
839: sub devalidate_getsection_cache {
840: my ($udom,$unam,$courseid)=@_;
841: $courseid=~s/\_/\//g;
842: $courseid=~s/^(\w)/\/$1/;
843: my $hashid="$udom:$unam:$courseid";
844: &devalidate_cache_new('getsection',$hashid);
845: }
846:
847: sub getsection {
848: my ($udom,$unam,$courseid)=@_;
849: my $cachetime=1800;
850: $courseid=~s/\_/\//g;
851: $courseid=~s/^(\w)/\/$1/;
852:
853: my $hashid="$udom:$unam:$courseid";
854: my ($result,$cached)=&is_cached_new('getsection',$hashid);
855: if (defined($cached)) { return $result; }
856:
857: my %Pending;
858: my %Expired;
859: #
860: # Each role can either have not started yet (pending), be active,
861: # or have expired.
862: #
863: # If there is an active role, we are done.
864: #
865: # If there is more than one role which has not started yet,
866: # choose the one which will start sooner
867: # If there is one role which has not started yet, return it.
868: #
869: # If there is more than one expired role, choose the one which ended last.
870: # If there is a role which has expired, return it.
871: #
872: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
873: &homeserver($unam,$udom)))) {
874: my ($key,$value)=split(/\=/,$_);
875: $key=&unescape($key);
876: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
877: my $section=$1;
878: if ($key eq $courseid.'_st') { $section=''; }
879: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
880: my $now=time;
881: if (defined($end) && $end && ($now > $end)) {
882: $Expired{$end}=$section;
883: next;
884: }
885: if (defined($start) && $start && ($now < $start)) {
886: $Pending{$start}=$section;
887: next;
888: }
889: return &do_cache_new('getsection',$hashid,$section,$cachetime);
890: }
891: #
892: # Presumedly there will be few matching roles from the above
893: # loop and the sorting time will be negligible.
894: if (scalar(keys(%Pending))) {
895: my ($time) = sort {$a <=> $b} keys(%Pending);
896: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
897: }
898: if (scalar(keys(%Expired))) {
899: my @sorted = sort {$a <=> $b} keys(%Expired);
900: my $time = pop(@sorted);
901: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
902: }
903: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
904: }
905:
906: sub save_cache {
907: &purge_remembered();
908: #&Apache::loncommon::validate_page();
909: undef(%env);
910: undef($env_loaded);
911: }
912:
913: my $to_remember=-1;
914: my %remembered;
915: my %accessed;
916: my $kicks=0;
917: my $hits=0;
918: sub devalidate_cache_new {
919: my ($name,$id,$debug) = @_;
920: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
921: $id=&escape($name.':'.$id);
922: $memcache->delete($id);
923: delete($remembered{$id});
924: delete($accessed{$id});
925: }
926:
927: sub is_cached_new {
928: my ($name,$id,$debug) = @_;
929: $id=&escape($name.':'.$id);
930: if (exists($remembered{$id})) {
931: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
932: $accessed{$id}=[&gettimeofday()];
933: $hits++;
934: return ($remembered{$id},1);
935: }
936: my $value = $memcache->get($id);
937: if (!(defined($value))) {
938: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
939: return (undef,undef);
940: }
941: if ($value eq '__undef__') {
942: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
943: $value=undef;
944: }
945: &make_room($id,$value,$debug);
946: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
947: return ($value,1);
948: }
949:
950: sub do_cache_new {
951: my ($name,$id,$value,$time,$debug) = @_;
952: $id=&escape($name.':'.$id);
953: my $setvalue=$value;
954: if (!defined($setvalue)) {
955: $setvalue='__undef__';
956: }
957: if (!defined($time) ) {
958: $time=600;
959: }
960: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
961: $memcache->set($id,$setvalue,$time);
962: # need to make a copy of $value
963: #&make_room($id,$value,$debug);
964: return $value;
965: }
966:
967: sub make_room {
968: my ($id,$value,$debug)=@_;
969: $remembered{$id}=$value;
970: if ($to_remember<0) { return; }
971: $accessed{$id}=[&gettimeofday()];
972: if (scalar(keys(%remembered)) <= $to_remember) { return; }
973: my $to_kick;
974: my $max_time=0;
975: foreach my $other (keys(%accessed)) {
976: if (&tv_interval($accessed{$other}) > $max_time) {
977: $to_kick=$other;
978: $max_time=&tv_interval($accessed{$other});
979: }
980: }
981: delete($remembered{$to_kick});
982: delete($accessed{$to_kick});
983: $kicks++;
984: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
985: return;
986: }
987:
988: sub purge_remembered {
989: #&logthis("Tossing ".scalar(keys(%remembered)));
990: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
991: undef(%remembered);
992: undef(%accessed);
993: }
994: # ------------------------------------- Read an entry from a user's environment
995:
996: sub userenvironment {
997: my ($udom,$unam,@what)=@_;
998: my %returnhash=();
999: my @answer=split(/\&/,
1000: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1001: &homeserver($unam,$udom)));
1002: my $i;
1003: for ($i=0;$i<=$#what;$i++) {
1004: $returnhash{$what[$i]}=&unescape($answer[$i]);
1005: }
1006: return %returnhash;
1007: }
1008:
1009: # ---------------------------------------------------------- Get a studentphoto
1010: sub studentphoto {
1011: my ($udom,$unam,$ext) = @_;
1012: my $home=&Apache::lonnet::homeserver($unam,$udom);
1013: if (defined($env{'request.course.id'})) {
1014: if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
1015: if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
1016: return(&retrievestudentphoto($udom,$unam,$ext));
1017: } else {
1018: my ($result,$perm_reqd)=
1019: &Apache::lonnet::auto_photo_permission($unam,$udom);
1020: if ($result eq 'ok') {
1021: if (!($perm_reqd eq 'yes')) {
1022: return(&retrievestudentphoto($udom,$unam,$ext));
1023: }
1024: }
1025: }
1026: }
1027: } else {
1028: my ($result,$perm_reqd) =
1029: &Apache::lonnet::auto_photo_permission($unam,$udom);
1030: if ($result eq 'ok') {
1031: if (!($perm_reqd eq 'yes')) {
1032: return(&retrievestudentphoto($udom,$unam,$ext));
1033: }
1034: }
1035: }
1036: return '/adm/lonKaputt/lonlogo_broken.gif';
1037: }
1038:
1039: sub retrievestudentphoto {
1040: my ($udom,$unam,$ext,$type) = @_;
1041: my $home=&Apache::lonnet::homeserver($unam,$udom);
1042: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
1043: if ($ret eq 'ok') {
1044: my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
1045: if ($type eq 'thumbnail') {
1046: $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
1047: }
1048: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
1049: return $tokenurl;
1050: } else {
1051: if ($type eq 'thumbnail') {
1052: return '/adm/lonKaputt/genericstudent_tn.gif';
1053: } else {
1054: return '/adm/lonKaputt/lonlogo_broken.gif';
1055: }
1056: }
1057: }
1058:
1059: # -------------------------------------------------------------------- New chat
1060:
1061: sub chatsend {
1062: my ($newentry,$anon,$group)=@_;
1063: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1064: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1065: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1066: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1067: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
1068: &escape($newentry)).':'.$group,$chome);
1069: }
1070:
1071: # ------------------------------------------ Find current version of a resource
1072:
1073: sub getversion {
1074: my $fname=&clutter(shift);
1075: unless ($fname=~/^\/res\//) { return -1; }
1076: return ¤tversion(&filelocation('',$fname));
1077: }
1078:
1079: sub currentversion {
1080: my $fname=shift;
1081: my ($result,$cached)=&is_cached_new('resversion',$fname);
1082: if (defined($cached)) { return $result; }
1083: my $author=$fname;
1084: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1085: my ($udom,$uname)=split(/\//,$author);
1086: my $home=homeserver($uname,$udom);
1087: if ($home eq 'no_host') {
1088: return -1;
1089: }
1090: my $answer=reply("currentversion:$fname",$home);
1091: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1092: return -1;
1093: }
1094: return &do_cache_new('resversion',$fname,$answer,600);
1095: }
1096:
1097: # ----------------------------- Subscribe to a resource, return URL if possible
1098:
1099: sub subscribe {
1100: my $fname=shift;
1101: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1102: $fname=~s/[\n\r]//g;
1103: my $author=$fname;
1104: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1105: my ($udom,$uname)=split(/\//,$author);
1106: my $home=homeserver($uname,$udom);
1107: if ($home eq 'no_host') {
1108: return 'not_found';
1109: }
1110: my $answer=reply("sub:$fname",$home);
1111: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1112: $answer.=' by '.$home;
1113: }
1114: return $answer;
1115: }
1116:
1117: # -------------------------------------------------------------- Replicate file
1118:
1119: sub repcopy {
1120: my $filename=shift;
1121: $filename=~s/\/+/\//g;
1122: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1123: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1124: if ($filename=~m|^/home/httpd/html/userfiles/| or
1125: $filename=~m -^/*(uploaded|editupload)/-) {
1126: return &repcopy_userfile($filename);
1127: }
1128: $filename=~s/[\n\r]//g;
1129: my $transname="$filename.in.transfer";
1130: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1131: my $remoteurl=subscribe($filename);
1132: if ($remoteurl =~ /^con_lost by/) {
1133: &logthis("Subscribe returned $remoteurl: $filename");
1134: return 'unavailable';
1135: } elsif ($remoteurl eq 'not_found') {
1136: #&logthis("Subscribe returned not_found: $filename");
1137: return 'not_found';
1138: } elsif ($remoteurl =~ /^rejected by/) {
1139: &logthis("Subscribe returned $remoteurl: $filename");
1140: return 'forbidden';
1141: } elsif ($remoteurl eq 'directory') {
1142: return 'ok';
1143: } else {
1144: my $author=$filename;
1145: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1146: my ($udom,$uname)=split(/\//,$author);
1147: my $home=homeserver($uname,$udom);
1148: unless ($home eq $perlvar{'lonHostID'}) {
1149: my @parts=split(/\//,$filename);
1150: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1151: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1152: &logthis("Malconfiguration for replication: $filename");
1153: return 'bad_request';
1154: }
1155: my $count;
1156: for ($count=5;$count<$#parts;$count++) {
1157: $path.="/$parts[$count]";
1158: if ((-e $path)!=1) {
1159: mkdir($path,0777);
1160: }
1161: }
1162: my $ua=new LWP::UserAgent;
1163: my $request=new HTTP::Request('GET',"$remoteurl");
1164: my $response=$ua->request($request,$transname);
1165: if ($response->is_error()) {
1166: unlink($transname);
1167: my $message=$response->status_line;
1168: &logthis("<font color=\"blue\">WARNING:"
1169: ." LWP get: $message: $filename</font>");
1170: return 'unavailable';
1171: } else {
1172: if ($remoteurl!~/\.meta$/) {
1173: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1174: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1175: if ($mresponse->is_error()) {
1176: unlink($filename.'.meta');
1177: &logthis(
1178: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1179: }
1180: }
1181: rename($transname,$filename);
1182: return 'ok';
1183: }
1184: }
1185: }
1186: }
1187:
1188: # ------------------------------------------------ Get server side include body
1189: sub ssi_body {
1190: my ($filelink,%form)=@_;
1191: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1192: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1193: }
1194: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1195: &ssi($filelink,%form));
1196: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
1197: $output=~s/^.*?\<body[^\>]*\>//si;
1198: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1199: return $output;
1200: }
1201:
1202: # --------------------------------------------------------- Server Side Include
1203:
1204: sub absolute_url {
1205: my ($host_name) = @_;
1206: my $protocol = ($ENV{'SERVER_PORT'} == 443?'https://':'http://');
1207: if ($host_name eq '') {
1208: $host_name = $ENV{'SERVER_NAME'};
1209: }
1210: return $protocol.$host_name;
1211: }
1212:
1213: sub ssi {
1214:
1215: my ($fn,%form)=@_;
1216:
1217: my $ua=new LWP::UserAgent;
1218:
1219: my $request;
1220:
1221: $form{'no_update_last_known'}=1;
1222:
1223: if (%form) {
1224: $request=new HTTP::Request('POST',&absolute_url().$fn);
1225: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1226: } else {
1227: $request=new HTTP::Request('GET',&absolute_url().$fn);
1228: }
1229:
1230: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1231: my $response=$ua->request($request);
1232:
1233: return $response->content;
1234: }
1235:
1236: sub externalssi {
1237: my ($url)=@_;
1238: my $ua=new LWP::UserAgent;
1239: my $request=new HTTP::Request('GET',$url);
1240: my $response=$ua->request($request);
1241: return $response->content;
1242: }
1243:
1244: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1245:
1246: sub allowuploaded {
1247: my ($srcurl,$url)=@_;
1248: $url=&clutter(&declutter($url));
1249: my $dir=$url;
1250: $dir=~s/\/[^\/]+$//;
1251: my %httpref=();
1252: my $httpurl=&hreflocation('',$url);
1253: $httpref{'httpref.'.$httpurl}=$srcurl;
1254: &Apache::lonnet::appenv(%httpref);
1255: }
1256:
1257: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1258: # input: action, courseID, current domain, intended
1259: # path to file, source of file, instruction to parse file for objects,
1260: # ref to hash for embedded objects,
1261: # ref to hash for codebase of java objects.
1262: #
1263: # output: url to file (if action was uploaddoc),
1264: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1265: #
1266: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1267: # course.
1268: #
1269: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1270: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1271: # course's home server.
1272: #
1273: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1274: # be copied from $source (current location) to
1275: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1276: # and will then be copied to
1277: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1278: # course's home server.
1279: #
1280: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1281: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1282: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1283: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1284: # in course's home server.
1285: #
1286:
1287: sub process_coursefile {
1288: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1289: my $fetchresult;
1290: my $home=&homeserver($docuname,$docudom);
1291: if ($action eq 'propagate') {
1292: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1293: $home);
1294: } else {
1295: my $fpath = '';
1296: my $fname = $file;
1297: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1298: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1299: my $filepath = &build_filepath($fpath);
1300: if ($action eq 'copy') {
1301: if ($source eq '') {
1302: $fetchresult = 'no source file';
1303: return $fetchresult;
1304: } else {
1305: my $destination = $filepath.'/'.$fname;
1306: rename($source,$destination);
1307: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1308: $home);
1309: }
1310: } elsif ($action eq 'uploaddoc') {
1311: open(my $fh,'>'.$filepath.'/'.$fname);
1312: print $fh $env{'form.'.$source};
1313: close($fh);
1314: if ($parser eq 'parse') {
1315: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1316: unless ($parse_result eq 'ok') {
1317: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1318: }
1319: }
1320: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1321: $home);
1322: if ($fetchresult eq 'ok') {
1323: return '/uploaded/'.$fpath.'/'.$fname;
1324: } else {
1325: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1326: ' to host '.$home.': '.$fetchresult);
1327: return '/adm/notfound.html';
1328: }
1329: }
1330: }
1331: unless ( $fetchresult eq 'ok') {
1332: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1333: ' to host '.$home.': '.$fetchresult);
1334: }
1335: return $fetchresult;
1336: }
1337:
1338: sub build_filepath {
1339: my ($fpath) = @_;
1340: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1341: unless ($fpath eq '') {
1342: my @parts=split('/',$fpath);
1343: foreach my $part (@parts) {
1344: $filepath.= '/'.$part;
1345: if ((-e $filepath)!=1) {
1346: mkdir($filepath,0777);
1347: }
1348: }
1349: }
1350: return $filepath;
1351: }
1352:
1353: sub store_edited_file {
1354: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1355: my $file = $primary_url;
1356: $file =~ s#^/uploaded/$docudom/$docuname/##;
1357: my $fpath = '';
1358: my $fname = $file;
1359: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1360: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1361: my $filepath = &build_filepath($fpath);
1362: open(my $fh,'>'.$filepath.'/'.$fname);
1363: print $fh $content;
1364: close($fh);
1365: my $home=&homeserver($docuname,$docudom);
1366: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1367: $home);
1368: if ($$fetchresult eq 'ok') {
1369: return '/uploaded/'.$fpath.'/'.$fname;
1370: } else {
1371: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1372: ' to host '.$home.': '.$$fetchresult);
1373: return '/adm/notfound.html';
1374: }
1375: }
1376:
1377: sub clean_filename {
1378: my ($fname)=@_;
1379: # Replace Windows backslashes by forward slashes
1380: $fname=~s/\\/\//g;
1381: # Get rid of everything but the actual filename
1382: $fname=~s/^.*\/([^\/]+)$/$1/;
1383: # Replace spaces by underscores
1384: $fname=~s/\s+/\_/g;
1385: # Replace all other weird characters by nothing
1386: $fname=~s/[^\w\.\-]//g;
1387: # Replace all .\d. sequences with _\d. so they no longer look like version
1388: # numbers
1389: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1390: return $fname;
1391: }
1392:
1393: # --------------- Take an uploaded file and put it into the userfiles directory
1394: # input: $formname - the contents of the file are in $env{"form.$formname"}
1395: # the desired filenam is in $env{"form.$formname.filename"}
1396: # $coursedoc - if true up to the current course
1397: # if false
1398: # $subdir - directory in userfile to store the file into
1399: # $parser, $allfiles, $codebase - unknown
1400: #
1401: # output: url of file in userspace, or error: <message>
1402: # or /adm/notfound.html if failure to upload occurse
1403:
1404:
1405: sub userfileupload {
1406: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,$destudom)=@_;
1407: if (!defined($subdir)) { $subdir='unknown'; }
1408: my $fname=$env{'form.'.$formname.'.filename'};
1409: $fname=&clean_filename($fname);
1410: # See if there is anything left
1411: unless ($fname) { return 'error: no uploaded file'; }
1412: chop($env{'form.'.$formname});
1413: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1414: my $now = time;
1415: my $filepath = 'tmp/helprequests/'.$now;
1416: my @parts=split(/\//,$filepath);
1417: my $fullpath = $perlvar{'lonDaemons'};
1418: for (my $i=0;$i<@parts;$i++) {
1419: $fullpath .= '/'.$parts[$i];
1420: if ((-e $fullpath)!=1) {
1421: mkdir($fullpath,0777);
1422: }
1423: }
1424: open(my $fh,'>'.$fullpath.'/'.$fname);
1425: print $fh $env{'form.'.$formname};
1426: close($fh);
1427: return $fullpath.'/'.$fname;
1428: } elsif (($formname eq 'coursecreatorxml') && ($subdir eq 'batchupload')) { #files uploaded to create course page are handled differently
1429: my $filepath = 'tmp/addcourse/'.$destudom.'/web/'.$env{'user.name'}.
1430: '_'.$env{'user.domain'}.'/pending';
1431: my @parts=split(/\//,$filepath);
1432: my $fullpath = $perlvar{'lonDaemons'};
1433: for (my $i=0;$i<@parts;$i++) {
1434: $fullpath .= '/'.$parts[$i];
1435: if ((-e $fullpath)!=1) {
1436: mkdir($fullpath,0777);
1437: }
1438: }
1439: open(my $fh,'>'.$fullpath.'/'.$fname);
1440: print $fh $env{'form.'.$formname};
1441: close($fh);
1442: return $fullpath.'/'.$fname;
1443: }
1444:
1445: # Create the directory if not present
1446: $fname="$subdir/$fname";
1447: if ($coursedoc) {
1448: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1449: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1450: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1451: return &finishuserfileupload($docuname,$docudom,
1452: $formname,$fname,$parser,$allfiles,
1453: $codebase);
1454: } else {
1455: $fname=$env{'form.folder'}.'/'.$fname;
1456: return &process_coursefile('uploaddoc',$docuname,$docudom,
1457: $fname,$formname,$parser,
1458: $allfiles,$codebase);
1459: }
1460: } elsif (defined($destuname)) {
1461: my $docuname=$destuname;
1462: my $docudom=$destudom;
1463: return &finishuserfileupload($docuname,$docudom,$formname,
1464: $fname,$parser,$allfiles,$codebase);
1465:
1466: } else {
1467: my $docuname=$env{'user.name'};
1468: my $docudom=$env{'user.domain'};
1469: if (exists($env{'form.group'})) {
1470: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1471: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1472: }
1473: return &finishuserfileupload($docuname,$docudom,$formname,
1474: $fname,$parser,$allfiles,$codebase);
1475: }
1476: }
1477:
1478: sub finishuserfileupload {
1479: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
1480: my $path=$docudom.'/'.$docuname.'/';
1481: my $filepath=$perlvar{'lonDocRoot'};
1482: my ($fnamepath,$file);
1483: $file=$fname;
1484: if ($fname=~m|/|) {
1485: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1486: $path.=$fnamepath.'/';
1487: }
1488: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1489: my $count;
1490: for ($count=4;$count<=$#parts;$count++) {
1491: $filepath.="/$parts[$count]";
1492: if ((-e $filepath)!=1) {
1493: mkdir($filepath,0777);
1494: }
1495: }
1496: # Save the file
1497: {
1498: if (!open(FH,'>'.$filepath.'/'.$file)) {
1499: &logthis('Failed to create '.$filepath.'/'.$file);
1500: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1501: return '/adm/notfound.html';
1502: }
1503: if (!print FH ($env{'form.'.$formname})) {
1504: &logthis('Failed to write to '.$filepath.'/'.$file);
1505: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1506: return '/adm/notfound.html';
1507: }
1508: close(FH);
1509: }
1510: if ($parser eq 'parse') {
1511: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1512: $codebase);
1513: unless ($parse_result eq 'ok') {
1514: &logthis('Failed to parse '.$filepath.$file.
1515: ' for embedded media: '.$parse_result);
1516: }
1517: }
1518: # Notify homeserver to grep it
1519: #
1520: my $docuhome=&homeserver($docuname,$docudom);
1521: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1522: if ($fetchresult eq 'ok') {
1523: #
1524: # Return the URL to it
1525: return '/uploaded/'.$path.$file;
1526: } else {
1527: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1528: ': '.$fetchresult);
1529: return '/adm/notfound.html';
1530: }
1531: }
1532:
1533: sub extract_embedded_items {
1534: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1535: my @state = ();
1536: my %javafiles = (
1537: codebase => '',
1538: code => '',
1539: archive => ''
1540: );
1541: my %mediafiles = (
1542: src => '',
1543: movie => '',
1544: );
1545: my $p;
1546: if ($content) {
1547: $p = HTML::LCParser->new($content);
1548: } else {
1549: $p = HTML::LCParser->new($filepath.'/'.$file);
1550: }
1551: while (my $t=$p->get_token()) {
1552: if ($t->[0] eq 'S') {
1553: my ($tagname, $attr) = ($t->[1],$t->[2]);
1554: push (@state, $tagname);
1555: if (lc($tagname) eq 'allow') {
1556: &add_filetype($allfiles,$attr->{'src'},'src');
1557: }
1558: if (lc($tagname) eq 'img') {
1559: &add_filetype($allfiles,$attr->{'src'},'src');
1560: }
1561: if (lc($tagname) eq 'script') {
1562: if ($attr->{'archive'} =~ /\.jar$/i) {
1563: &add_filetype($allfiles,$attr->{'archive'},'archive');
1564: } else {
1565: &add_filetype($allfiles,$attr->{'src'},'src');
1566: }
1567: }
1568: if (lc($tagname) eq 'link') {
1569: if (lc($attr->{'rel'}) eq 'stylesheet') {
1570: &add_filetype($allfiles,$attr->{'href'},'href');
1571: }
1572: }
1573: if (lc($tagname) eq 'object' ||
1574: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1575: foreach my $item (keys(%javafiles)) {
1576: $javafiles{$item} = '';
1577: }
1578: }
1579: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1580: my $name = lc($attr->{'name'});
1581: foreach my $item (keys(%javafiles)) {
1582: if ($name eq $item) {
1583: $javafiles{$item} = $attr->{'value'};
1584: last;
1585: }
1586: }
1587: foreach my $item (keys(%mediafiles)) {
1588: if ($name eq $item) {
1589: &add_filetype($allfiles, $attr->{'value'}, 'value');
1590: last;
1591: }
1592: }
1593: }
1594: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1595: foreach my $item (keys(%javafiles)) {
1596: if ($attr->{$item}) {
1597: $javafiles{$item} = $attr->{$item};
1598: last;
1599: }
1600: }
1601: foreach my $item (keys(%mediafiles)) {
1602: if ($attr->{$item}) {
1603: &add_filetype($allfiles,$attr->{$item},$item);
1604: last;
1605: }
1606: }
1607: }
1608: } elsif ($t->[0] eq 'E') {
1609: my ($tagname) = ($t->[1]);
1610: if ($javafiles{'codebase'} ne '') {
1611: $javafiles{'codebase'} .= '/';
1612: }
1613: if (lc($tagname) eq 'applet' ||
1614: lc($tagname) eq 'object' ||
1615: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1616: ) {
1617: foreach my $item (keys(%javafiles)) {
1618: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1619: my $file=$javafiles{'codebase'}.$javafiles{$item};
1620: &add_filetype($allfiles,$file,$item);
1621: }
1622: }
1623: }
1624: pop @state;
1625: }
1626: }
1627: return 'ok';
1628: }
1629:
1630: sub add_filetype {
1631: my ($allfiles,$file,$type)=@_;
1632: if (exists($allfiles->{$file})) {
1633: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1634: push(@{$allfiles->{$file}}, &escape($type));
1635: }
1636: } else {
1637: @{$allfiles->{$file}} = (&escape($type));
1638: }
1639: }
1640:
1641: sub removeuploadedurl {
1642: my ($url)=@_;
1643: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1644: return &removeuserfile($uname,$udom,$fname);
1645: }
1646:
1647: sub removeuserfile {
1648: my ($docuname,$docudom,$fname)=@_;
1649: my $home=&homeserver($docuname,$docudom);
1650: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1651: }
1652:
1653: sub mkdiruserfile {
1654: my ($docuname,$docudom,$dir)=@_;
1655: my $home=&homeserver($docuname,$docudom);
1656: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1657: }
1658:
1659: sub renameuserfile {
1660: my ($docuname,$docudom,$old,$new)=@_;
1661: my $home=&homeserver($docuname,$docudom);
1662: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1663: &escape("$new"),$home);
1664: }
1665:
1666: # ------------------------------------------------------------------------- Log
1667:
1668: sub log {
1669: my ($dom,$nam,$hom,$what)=@_;
1670: return critical("log:$dom:$nam:$what",$hom);
1671: }
1672:
1673: # ------------------------------------------------------------------ Course Log
1674: #
1675: # This routine flushes several buffers of non-mission-critical nature
1676: #
1677:
1678: sub flushcourselogs {
1679: &logthis('Flushing log buffers');
1680: #
1681: # course logs
1682: # This is a log of all transactions in a course, which can be used
1683: # for data mining purposes
1684: #
1685: # It also collects the courseid database, which lists last transaction
1686: # times and course titles for all courseids
1687: #
1688: my %courseidbuffer=();
1689: foreach (keys %courselogs) {
1690: my $crsid=$_;
1691: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1692: &escape($courselogs{$crsid}),
1693: $coursehombuf{$crsid}) eq 'ok') {
1694: delete $courselogs{$crsid};
1695: } else {
1696: &logthis('Failed to flush log buffer for '.$crsid);
1697: if (length($courselogs{$crsid})>40000) {
1698: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
1699: " exceeded maximum size, deleting.</font>");
1700: delete $courselogs{$crsid};
1701: }
1702: }
1703: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1704: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1705: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1706: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1707: } else {
1708: $courseidbuffer{$coursehombuf{$crsid}}=
1709: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1710: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1711: }
1712: }
1713: #
1714: # Write course id database (reverse lookup) to homeserver of courses
1715: # Is used in pickcourse
1716: #
1717: foreach (keys %courseidbuffer) {
1718: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1719: }
1720: #
1721: # File accesses
1722: # Writes to the dynamic metadata of resources to get hit counts, etc.
1723: #
1724: foreach my $entry (keys(%accesshash)) {
1725: if ($entry =~ /___count$/) {
1726: my ($dom,$name);
1727: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1728: if (! defined($dom) || $dom eq '' ||
1729: ! defined($name) || $name eq '') {
1730: my $cid = $env{'request.course.id'};
1731: $dom = $env{'request.'.$cid.'.domain'};
1732: $name = $env{'request.'.$cid.'.num'};
1733: }
1734: my $value = $accesshash{$entry};
1735: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1736: my %temphash=($url => $value);
1737: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1738: if ($result eq 'ok') {
1739: delete $accesshash{$entry};
1740: } elsif ($result eq 'unknown_cmd') {
1741: # Target server has old code running on it.
1742: my %temphash=($entry => $value);
1743: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1744: delete $accesshash{$entry};
1745: }
1746: }
1747: } else {
1748: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1749: my %temphash=($entry => $accesshash{$entry});
1750: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1751: delete $accesshash{$entry};
1752: }
1753: }
1754: }
1755: #
1756: # Roles
1757: # Reverse lookup of user roles for course faculty/staff and co-authorship
1758: #
1759: foreach (keys %userrolehash) {
1760: my $entry=$_;
1761: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1762: split(/\:/,$entry);
1763: if (&Apache::lonnet::put('nohist_userroles',
1764: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1765: $rudom,$runame) eq 'ok') {
1766: delete $userrolehash{$entry};
1767: }
1768: }
1769: #
1770: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1771: #
1772: my %domrolebuffer = ();
1773: foreach my $entry (keys %domainrolehash) {
1774: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1775: if ($domrolebuffer{$rudom}) {
1776: $domrolebuffer{$rudom}.='&'.&escape($entry).
1777: '='.&escape($domainrolehash{$entry});
1778: } else {
1779: $domrolebuffer{$rudom}.=&escape($entry).
1780: '='.&escape($domainrolehash{$entry});
1781: }
1782: delete $domainrolehash{$entry};
1783: }
1784: foreach my $dom (keys(%domrolebuffer)) {
1785: foreach my $tryserver (keys %libserv) {
1786: if ($hostdom{$tryserver} eq $dom) {
1787: unless (&reply('domroleput:'.$dom.':'.
1788: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1789: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1790: }
1791: }
1792: }
1793: }
1794: $dumpcount++;
1795: }
1796:
1797: sub courselog {
1798: my $what=shift;
1799: $what=time.':'.$what;
1800: unless ($env{'request.course.id'}) { return ''; }
1801: $coursedombuf{$env{'request.course.id'}}=
1802: $env{'course.'.$env{'request.course.id'}.'.domain'};
1803: $coursenumbuf{$env{'request.course.id'}}=
1804: $env{'course.'.$env{'request.course.id'}.'.num'};
1805: $coursehombuf{$env{'request.course.id'}}=
1806: $env{'course.'.$env{'request.course.id'}.'.home'};
1807: $coursedescrbuf{$env{'request.course.id'}}=
1808: $env{'course.'.$env{'request.course.id'}.'.description'};
1809: $courseinstcodebuf{$env{'request.course.id'}}=
1810: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1811: $courseownerbuf{$env{'request.course.id'}}=
1812: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1813: $coursetypebuf{$env{'request.course.id'}}=
1814: $env{'course.'.$env{'request.course.id'}.'.type'};
1815: if (defined $courselogs{$env{'request.course.id'}}) {
1816: $courselogs{$env{'request.course.id'}}.='&'.$what;
1817: } else {
1818: $courselogs{$env{'request.course.id'}}.=$what;
1819: }
1820: if (length($courselogs{$env{'request.course.id'}})>4048) {
1821: &flushcourselogs();
1822: }
1823: }
1824:
1825: sub courseacclog {
1826: my $fnsymb=shift;
1827: unless ($env{'request.course.id'}) { return ''; }
1828: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1829: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1830: $what.=':POST';
1831: # FIXME: Probably ought to escape things....
1832: foreach (keys %env) {
1833: if ($_=~/^form\.(.*)/) {
1834: $what.=':'.$1.'='.$env{$_};
1835: }
1836: }
1837: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1838: # FIXME: We should not be depending on a form parameter that someone
1839: # editing lonsearchcat.pm might change in the future.
1840: if ($env{'form.phase'} eq 'course_search') {
1841: $what.= ':POST';
1842: # FIXME: Probably ought to escape things....
1843: foreach my $element ('courseexp','crsfulltext','crsrelated',
1844: 'crsdiscuss') {
1845: $what.=':'.$element.'='.$env{'form.'.$element};
1846: }
1847: }
1848: }
1849: &courselog($what);
1850: }
1851:
1852: sub countacc {
1853: my $url=&declutter(shift);
1854: return if (! defined($url) || $url eq '');
1855: unless ($env{'request.course.id'}) { return ''; }
1856: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1857: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1858: $accesshash{$key}++;
1859: }
1860:
1861: sub linklog {
1862: my ($from,$to)=@_;
1863: $from=&declutter($from);
1864: $to=&declutter($to);
1865: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1866: $accesshash{$to.'___'.$from.'___goto'}=1;
1867: }
1868:
1869: sub userrolelog {
1870: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1871: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
1872: ($trole=~/^in/) || ($trole=~/^cc/) ||
1873: ($trole=~/^ep/) || ($trole=~/^cr/) ||
1874: ($trole=~/^ta/)) {
1875: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1876: $userrolehash
1877: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1878: =$tend.':'.$tstart;
1879: }
1880: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
1881: ($trole=~/^li/) || ($trole=~/^li/) ||
1882: ($trole=~/^au/) || ($trole=~/^dg/) ||
1883: ($trole=~/^sc/)) {
1884: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1885: $domainrolehash
1886: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1887: = $tend.':'.$tstart;
1888: }
1889: }
1890:
1891: sub get_course_adv_roles {
1892: my $cid=shift;
1893: $cid=$env{'request.course.id'} unless (defined($cid));
1894: my %coursehash=&coursedescription($cid);
1895: my %nothide=();
1896: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1897: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1898: }
1899: my %returnhash=();
1900: my %dumphash=
1901: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1902: my $now=time;
1903: foreach (keys %dumphash) {
1904: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1905: if (($tstart) && ($tstart<0)) { next; }
1906: if (($tend) && ($tend<$now)) { next; }
1907: if (($tstart) && ($now<$tstart)) { next; }
1908: my ($role,$username,$domain,$section)=split(/\:/,$_);
1909: if ($username eq '' || $domain eq '') { next; }
1910: if ((&privileged($username,$domain)) &&
1911: (!$nothide{$username.':'.$domain})) { next; }
1912: if ($role eq 'cr') { next; }
1913: my $key=&plaintext($role);
1914: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1915: if ($returnhash{$key}) {
1916: $returnhash{$key}.=','.$username.':'.$domain;
1917: } else {
1918: $returnhash{$key}=$username.':'.$domain;
1919: }
1920: }
1921: return %returnhash;
1922: }
1923:
1924: sub get_my_roles {
1925: my ($uname,$udom)=@_;
1926: unless (defined($uname)) { $uname=$env{'user.name'}; }
1927: unless (defined($udom)) { $udom=$env{'user.domain'}; }
1928: my %dumphash=
1929: &dump('nohist_userroles',$udom,$uname);
1930: my %returnhash=();
1931: my $now=time;
1932: foreach (keys %dumphash) {
1933: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1934: if (($tstart) && ($tstart<0)) { next; }
1935: if (($tend) && ($tend<$now)) { next; }
1936: if (($tstart) && ($now<$tstart)) { next; }
1937: my ($role,$username,$domain,$section)=split(/\:/,$_);
1938: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1939: }
1940: return %returnhash;
1941: }
1942:
1943: # ----------------------------------------------------- Frontpage Announcements
1944: #
1945: #
1946:
1947: sub postannounce {
1948: my ($server,$text)=@_;
1949: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1950: unless ($text=~/\w/) { $text=''; }
1951: return &reply('setannounce:'.&escape($text),$server);
1952: }
1953:
1954: sub getannounce {
1955:
1956: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1957: my $announcement='';
1958: while (<$fh>) { $announcement .=$_; }
1959: close($fh);
1960: if ($announcement=~/\w/) {
1961: return
1962: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1963: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1964: } else {
1965: return '';
1966: }
1967: } else {
1968: return '';
1969: }
1970: }
1971:
1972: # ---------------------------------------------------------- Course ID routines
1973: # Deal with domain's nohist_courseid.db files
1974: #
1975:
1976: sub courseidput {
1977: my ($domain,$what,$coursehome)=@_;
1978: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1979: }
1980:
1981: sub courseiddump {
1982: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref,$typefilter,$regexp_ok)=@_;
1983: my %returnhash=();
1984: unless ($domfilter) { $domfilter=''; }
1985: foreach my $tryserver (keys %libserv) {
1986: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1987: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1988: foreach (
1989: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1990: $sincefilter.':'.&escape($descfilter).':'.
1991: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter).':'.&escape($typefilter).':'.&escape($regexp_ok),
1992: $tryserver))) {
1993: my ($key,$value)=split(/\=/,$_);
1994: if (($key) && ($value)) {
1995: $returnhash{&unescape($key)}=$value;
1996: }
1997: }
1998: }
1999: }
2000: }
2001: return %returnhash;
2002: }
2003:
2004: # ---------------------------------------------------------- DC e-mail
2005:
2006: sub dcmailput {
2007: my ($domain,$msgid,$message,$server)=@_;
2008: my $status = &Apache::lonnet::critical(
2009: 'dcmailput:'.$domain.':'.&escape($msgid).'='.
2010: &escape($message),$server);
2011: return $status;
2012: }
2013:
2014: sub dcmaildump {
2015: my ($dom,$startdate,$enddate,$senders) = @_;
2016: my %returnhash=();
2017: if (exists($domain_primary{$dom})) {
2018: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
2019: &escape($enddate).':';
2020: my @esc_senders=map { &escape($_)} @$senders;
2021: $cmd.=&escape(join('&',@esc_senders));
2022: foreach (split(/\&/,&reply($cmd,$domain_primary{$dom}))) {
2023: my ($key,$value) = split(/\=/,$_);
2024: if (($key) && ($value)) {
2025: $returnhash{&unescape($key)} = &unescape($value);
2026: }
2027: }
2028: }
2029: return %returnhash;
2030: }
2031: # ---------------------------------------------------------- Domain roles
2032:
2033: sub get_domain_roles {
2034: my ($dom,$roles,$startdate,$enddate)=@_;
2035: if (undef($startdate) || $startdate eq '') {
2036: $startdate = '.';
2037: }
2038: if (undef($enddate) || $enddate eq '') {
2039: $enddate = '.';
2040: }
2041: my $rolelist = join(':',@{$roles});
2042: my %personnel = ();
2043: foreach my $tryserver (keys(%libserv)) {
2044: if ($hostdom{$tryserver} eq $dom) {
2045: %{$personnel{$tryserver}}=();
2046: foreach (
2047: split(/\&/,&reply('domrolesdump:'.$dom.':'.
2048: &escape($startdate).':'.&escape($enddate).':'.
2049: &escape($rolelist), $tryserver))) {
2050: my($key,$value) = split(/\=/,$_);
2051: if (($key) && ($value)) {
2052: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
2053: }
2054: }
2055: }
2056: }
2057: return %personnel;
2058: }
2059:
2060: # ----------------------------------------------------------- Check out an item
2061:
2062: sub get_first_access {
2063: my ($type,$argsymb)=@_;
2064: my ($symb,$courseid,$udom,$uname)=&whichuser();
2065: if ($argsymb) { $symb=$argsymb; }
2066: my ($map,$id,$res)=&decode_symb($symb);
2067: if ($type eq 'map') {
2068: $res=&symbread($map);
2069: } else {
2070: $res=$symb;
2071: }
2072: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
2073: return $times{"$courseid\0$res"};
2074: }
2075:
2076: sub set_first_access {
2077: my ($type)=@_;
2078: my ($symb,$courseid,$udom,$uname)=&whichuser();
2079: my ($map,$id,$res)=&decode_symb($symb);
2080: if ($type eq 'map') {
2081: $res=&symbread($map);
2082: } else {
2083: $res=$symb;
2084: }
2085: my $firstaccess=&get_first_access($type,$symb);
2086: if (!$firstaccess) {
2087: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
2088: }
2089: return 'already_set';
2090: }
2091:
2092: sub checkout {
2093: my ($symb,$tuname,$tudom,$tcrsid)=@_;
2094: my $now=time;
2095: my $lonhost=$perlvar{'lonHostID'};
2096: my $infostr=&escape(
2097: 'CHECKOUTTOKEN&'.
2098: $tuname.'&'.
2099: $tudom.'&'.
2100: $tcrsid.'&'.
2101: $symb.'&'.
2102: $now.'&'.$ENV{'REMOTE_ADDR'});
2103: my $token=&reply('tmpput:'.$infostr,$lonhost);
2104: if ($token=~/^error\:/) {
2105: &logthis("<font color=\"blue\">WARNING: ".
2106: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
2107: "</font>");
2108: return '';
2109: }
2110:
2111: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
2112: $token=~tr/a-z/A-Z/;
2113:
2114: my %infohash=('resource.0.outtoken' => $token,
2115: 'resource.0.checkouttime' => $now,
2116: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
2117:
2118: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2119: return '';
2120: } else {
2121: &logthis("<font color=\"blue\">WARNING: ".
2122: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
2123: "</font>");
2124: }
2125:
2126: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2127: &escape('Checkout '.$infostr.' - '.
2128: $token)) ne 'ok') {
2129: return '';
2130: } else {
2131: &logthis("<font color=\"blue\">WARNING: ".
2132: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
2133: "</font>");
2134: }
2135: return $token;
2136: }
2137:
2138: # ------------------------------------------------------------ Check in an item
2139:
2140: sub checkin {
2141: my $token=shift;
2142: my $now=time;
2143: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2144: $lonhost=~tr/A-Z/a-z/;
2145: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
2146: $dtoken=~s/\W/\_/g;
2147: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2148: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2149:
2150: unless (($tuname) && ($tudom)) {
2151: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2152: return '';
2153: }
2154:
2155: unless (&allowed('mgr',$tcrsid)) {
2156: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2157: $env{'user.name'}.' - '.$env{'user.domain'});
2158: return '';
2159: }
2160:
2161: my %infohash=('resource.0.intoken' => $token,
2162: 'resource.0.checkintime' => $now,
2163: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2164:
2165: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2166: return '';
2167: }
2168:
2169: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2170: &escape('Checkin - '.$token)) ne 'ok') {
2171: return '';
2172: }
2173:
2174: return ($symb,$tuname,$tudom,$tcrsid);
2175: }
2176:
2177: # --------------------------------------------- Set Expire Date for Spreadsheet
2178:
2179: sub expirespread {
2180: my ($uname,$udom,$stype,$usymb)=@_;
2181: my $cid=$env{'request.course.id'};
2182: if ($cid) {
2183: my $now=time;
2184: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2185: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2186: $env{'course.'.$cid.'.num'}.
2187: ':nohist_expirationdates:'.
2188: &escape($key).'='.$now,
2189: $env{'course.'.$cid.'.home'})
2190: }
2191: return 'ok';
2192: }
2193:
2194: # ----------------------------------------------------- Devalidate Spreadsheets
2195:
2196: sub devalidate {
2197: my ($symb,$uname,$udom)=@_;
2198: my $cid=$env{'request.course.id'};
2199: if ($cid) {
2200: # delete the stored spreadsheets for
2201: # - the student level sheet of this user in course's homespace
2202: # - the assessment level sheet for this resource
2203: # for this user in user's homespace
2204: # - current conditional state info
2205: my $key=$uname.':'.$udom.':';
2206: my $status=
2207: &del('nohist_calculatedsheets',
2208: [$key.'studentcalc:'],
2209: $env{'course.'.$cid.'.domain'},
2210: $env{'course.'.$cid.'.num'})
2211: .' '.
2212: &del('nohist_calculatedsheets_'.$cid,
2213: [$key.'assesscalc:'.$symb],$udom,$uname);
2214: unless ($status eq 'ok ok') {
2215: &logthis('Could not devalidate spreadsheet '.
2216: $uname.' at '.$udom.' for '.
2217: $symb.': '.$status);
2218: }
2219: &delenv('user.state.'.$cid);
2220: }
2221: }
2222:
2223: sub get_scalar {
2224: my ($string,$end) = @_;
2225: my $value;
2226: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2227: $value = $1;
2228: } elsif ($$string =~ s/^([^&]*?)&//) {
2229: $value = $1;
2230: }
2231: return &unescape($value);
2232: }
2233:
2234: sub array2str {
2235: my (@array) = @_;
2236: my $result=&arrayref2str(\@array);
2237: $result=~s/^__ARRAY_REF__//;
2238: $result=~s/__END_ARRAY_REF__$//;
2239: return $result;
2240: }
2241:
2242: sub arrayref2str {
2243: my ($arrayref) = @_;
2244: my $result='__ARRAY_REF__';
2245: foreach my $elem (@$arrayref) {
2246: if(ref($elem) eq 'ARRAY') {
2247: $result.=&arrayref2str($elem).'&';
2248: } elsif(ref($elem) eq 'HASH') {
2249: $result.=&hashref2str($elem).'&';
2250: } elsif(ref($elem)) {
2251: #print("Got a ref of ".(ref($elem))." skipping.");
2252: } else {
2253: $result.=&escape($elem).'&';
2254: }
2255: }
2256: $result=~s/\&$//;
2257: $result .= '__END_ARRAY_REF__';
2258: return $result;
2259: }
2260:
2261: sub hash2str {
2262: my (%hash) = @_;
2263: my $result=&hashref2str(\%hash);
2264: $result=~s/^__HASH_REF__//;
2265: $result=~s/__END_HASH_REF__$//;
2266: return $result;
2267: }
2268:
2269: sub hashref2str {
2270: my ($hashref)=@_;
2271: my $result='__HASH_REF__';
2272: foreach (sort(keys(%$hashref))) {
2273: if (ref($_) eq 'ARRAY') {
2274: $result.=&arrayref2str($_).'=';
2275: } elsif (ref($_) eq 'HASH') {
2276: $result.=&hashref2str($_).'=';
2277: } elsif (ref($_)) {
2278: $result.='=';
2279: #print("Got a ref of ".(ref($_))." skipping.");
2280: } else {
2281: if ($_) {$result.=&escape($_).'=';} else { last; }
2282: }
2283:
2284: if(ref($hashref->{$_}) eq 'ARRAY') {
2285: $result.=&arrayref2str($hashref->{$_}).'&';
2286: } elsif(ref($hashref->{$_}) eq 'HASH') {
2287: $result.=&hashref2str($hashref->{$_}).'&';
2288: } elsif(ref($hashref->{$_})) {
2289: $result.='&';
2290: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
2291: } else {
2292: $result.=&escape($hashref->{$_}).'&';
2293: }
2294: }
2295: $result=~s/\&$//;
2296: $result .= '__END_HASH_REF__';
2297: return $result;
2298: }
2299:
2300: sub str2hash {
2301: my ($string)=@_;
2302: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2303: return %$hash;
2304: }
2305:
2306: sub str2hashref {
2307: my ($string) = @_;
2308:
2309: my %hash;
2310:
2311: if($string !~ /^__HASH_REF__/) {
2312: if (! ($string eq '' || !defined($string))) {
2313: $hash{'error'}='Not hash reference';
2314: }
2315: return (\%hash, $string);
2316: }
2317:
2318: $string =~ s/^__HASH_REF__//;
2319:
2320: while($string !~ /^__END_HASH_REF__/) {
2321: #key
2322: my $key='';
2323: if($string =~ /^__HASH_REF__/) {
2324: ($key, $string)=&str2hashref($string);
2325: if(defined($key->{'error'})) {
2326: $hash{'error'}='Bad data';
2327: return (\%hash, $string);
2328: }
2329: } elsif($string =~ /^__ARRAY_REF__/) {
2330: ($key, $string)=&str2arrayref($string);
2331: if($key->[0] eq 'Array reference error') {
2332: $hash{'error'}='Bad data';
2333: return (\%hash, $string);
2334: }
2335: } else {
2336: $string =~ s/^(.*?)=//;
2337: $key=&unescape($1);
2338: }
2339: $string =~ s/^=//;
2340:
2341: #value
2342: my $value='';
2343: if($string =~ /^__HASH_REF__/) {
2344: ($value, $string)=&str2hashref($string);
2345: if(defined($value->{'error'})) {
2346: $hash{'error'}='Bad data';
2347: return (\%hash, $string);
2348: }
2349: } elsif($string =~ /^__ARRAY_REF__/) {
2350: ($value, $string)=&str2arrayref($string);
2351: if($value->[0] eq 'Array reference error') {
2352: $hash{'error'}='Bad data';
2353: return (\%hash, $string);
2354: }
2355: } else {
2356: $value=&get_scalar(\$string,'__END_HASH_REF__');
2357: }
2358: $string =~ s/^&//;
2359:
2360: $hash{$key}=$value;
2361: }
2362:
2363: $string =~ s/^__END_HASH_REF__//;
2364:
2365: return (\%hash, $string);
2366: }
2367:
2368: sub str2array {
2369: my ($string)=@_;
2370: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2371: return @$array;
2372: }
2373:
2374: sub str2arrayref {
2375: my ($string) = @_;
2376: my @array;
2377:
2378: if($string !~ /^__ARRAY_REF__/) {
2379: if (! ($string eq '' || !defined($string))) {
2380: $array[0]='Array reference error';
2381: }
2382: return (\@array, $string);
2383: }
2384:
2385: $string =~ s/^__ARRAY_REF__//;
2386:
2387: while($string !~ /^__END_ARRAY_REF__/) {
2388: my $value='';
2389: if($string =~ /^__HASH_REF__/) {
2390: ($value, $string)=&str2hashref($string);
2391: if(defined($value->{'error'})) {
2392: $array[0] ='Array reference error';
2393: return (\@array, $string);
2394: }
2395: } elsif($string =~ /^__ARRAY_REF__/) {
2396: ($value, $string)=&str2arrayref($string);
2397: if($value->[0] eq 'Array reference error') {
2398: $array[0] ='Array reference error';
2399: return (\@array, $string);
2400: }
2401: } else {
2402: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2403: }
2404: $string =~ s/^&//;
2405:
2406: push(@array, $value);
2407: }
2408:
2409: $string =~ s/^__END_ARRAY_REF__//;
2410:
2411: return (\@array, $string);
2412: }
2413:
2414: # -------------------------------------------------------------------Temp Store
2415:
2416: sub tmpreset {
2417: my ($symb,$namespace,$domain,$stuname) = @_;
2418: if (!$symb) {
2419: $symb=&symbread();
2420: if (!$symb) { $symb= $env{'request.url'}; }
2421: }
2422: $symb=escape($symb);
2423:
2424: if (!$namespace) { $namespace=$env{'request.state'}; }
2425: $namespace=~s/\//\_/g;
2426: $namespace=~s/\W//g;
2427:
2428: if (!$domain) { $domain=$env{'user.domain'}; }
2429: if (!$stuname) { $stuname=$env{'user.name'}; }
2430: if ($domain eq 'public' && $stuname eq 'public') {
2431: $stuname=$ENV{'REMOTE_ADDR'};
2432: }
2433: my $path=$perlvar{'lonDaemons'}.'/tmp';
2434: my %hash;
2435: if (tie(%hash,'GDBM_File',
2436: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2437: &GDBM_WRCREAT(),0640)) {
2438: foreach my $key (keys %hash) {
2439: if ($key=~ /:$symb/) {
2440: delete($hash{$key});
2441: }
2442: }
2443: }
2444: }
2445:
2446: sub tmpstore {
2447: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2448:
2449: if (!$symb) {
2450: $symb=&symbread();
2451: if (!$symb) { $symb= $env{'request.url'}; }
2452: }
2453: $symb=escape($symb);
2454:
2455: if (!$namespace) {
2456: # I don't think we would ever want to store this for a course.
2457: # it seems this will only be used if we don't have a course.
2458: #$namespace=$env{'request.course.id'};
2459: #if (!$namespace) {
2460: $namespace=$env{'request.state'};
2461: #}
2462: }
2463: $namespace=~s/\//\_/g;
2464: $namespace=~s/\W//g;
2465: if (!$domain) { $domain=$env{'user.domain'}; }
2466: if (!$stuname) { $stuname=$env{'user.name'}; }
2467: if ($domain eq 'public' && $stuname eq 'public') {
2468: $stuname=$ENV{'REMOTE_ADDR'};
2469: }
2470: my $now=time;
2471: my %hash;
2472: my $path=$perlvar{'lonDaemons'}.'/tmp';
2473: if (tie(%hash,'GDBM_File',
2474: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2475: &GDBM_WRCREAT(),0640)) {
2476: $hash{"version:$symb"}++;
2477: my $version=$hash{"version:$symb"};
2478: my $allkeys='';
2479: foreach my $key (keys(%$storehash)) {
2480: $allkeys.=$key.':';
2481: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2482: }
2483: $hash{"$version:$symb:timestamp"}=$now;
2484: $allkeys.='timestamp';
2485: $hash{"$version:keys:$symb"}=$allkeys;
2486: if (untie(%hash)) {
2487: return 'ok';
2488: } else {
2489: return "error:$!";
2490: }
2491: } else {
2492: return "error:$!";
2493: }
2494: }
2495:
2496: # -----------------------------------------------------------------Temp Restore
2497:
2498: sub tmprestore {
2499: my ($symb,$namespace,$domain,$stuname) = @_;
2500:
2501: if (!$symb) {
2502: $symb=&symbread();
2503: if (!$symb) { $symb= $env{'request.url'}; }
2504: }
2505: $symb=escape($symb);
2506:
2507: if (!$namespace) { $namespace=$env{'request.state'}; }
2508:
2509: if (!$domain) { $domain=$env{'user.domain'}; }
2510: if (!$stuname) { $stuname=$env{'user.name'}; }
2511: if ($domain eq 'public' && $stuname eq 'public') {
2512: $stuname=$ENV{'REMOTE_ADDR'};
2513: }
2514: my %returnhash;
2515: $namespace=~s/\//\_/g;
2516: $namespace=~s/\W//g;
2517: my %hash;
2518: my $path=$perlvar{'lonDaemons'}.'/tmp';
2519: if (tie(%hash,'GDBM_File',
2520: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2521: &GDBM_READER(),0640)) {
2522: my $version=$hash{"version:$symb"};
2523: $returnhash{'version'}=$version;
2524: my $scope;
2525: for ($scope=1;$scope<=$version;$scope++) {
2526: my $vkeys=$hash{"$scope:keys:$symb"};
2527: my @keys=split(/:/,$vkeys);
2528: my $key;
2529: $returnhash{"$scope:keys"}=$vkeys;
2530: foreach $key (@keys) {
2531: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2532: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2533: }
2534: }
2535: if (!(untie(%hash))) {
2536: return "error:$!";
2537: }
2538: } else {
2539: return "error:$!";
2540: }
2541: return %returnhash;
2542: }
2543:
2544: # ----------------------------------------------------------------------- Store
2545:
2546: sub store {
2547: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2548: my $home='';
2549:
2550: if ($stuname) { $home=&homeserver($stuname,$domain); }
2551:
2552: $symb=&symbclean($symb);
2553: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2554:
2555: if (!$domain) { $domain=$env{'user.domain'}; }
2556: if (!$stuname) { $stuname=$env{'user.name'}; }
2557:
2558: &devalidate($symb,$stuname,$domain);
2559:
2560: $symb=escape($symb);
2561: if (!$namespace) {
2562: unless ($namespace=$env{'request.course.id'}) {
2563: return '';
2564: }
2565: }
2566: if (!$home) { $home=$env{'user.home'}; }
2567:
2568: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2569: $$storehash{'host'}=$perlvar{'lonHostID'};
2570:
2571: my $namevalue='';
2572: foreach (keys %$storehash) {
2573: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2574: }
2575: $namevalue=~s/\&$//;
2576: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2577: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2578: }
2579:
2580: # -------------------------------------------------------------- Critical Store
2581:
2582: sub cstore {
2583: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2584: my $home='';
2585:
2586: if ($stuname) { $home=&homeserver($stuname,$domain); }
2587:
2588: $symb=&symbclean($symb);
2589: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2590:
2591: if (!$domain) { $domain=$env{'user.domain'}; }
2592: if (!$stuname) { $stuname=$env{'user.name'}; }
2593:
2594: &devalidate($symb,$stuname,$domain);
2595:
2596: $symb=escape($symb);
2597: if (!$namespace) {
2598: unless ($namespace=$env{'request.course.id'}) {
2599: return '';
2600: }
2601: }
2602: if (!$home) { $home=$env{'user.home'}; }
2603:
2604: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2605: $$storehash{'host'}=$perlvar{'lonHostID'};
2606:
2607: my $namevalue='';
2608: foreach (keys %$storehash) {
2609: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2610: }
2611: $namevalue=~s/\&$//;
2612: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2613: return critical
2614: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2615: }
2616:
2617: # --------------------------------------------------------------------- Restore
2618:
2619: sub restore {
2620: my ($symb,$namespace,$domain,$stuname) = @_;
2621: my $home='';
2622:
2623: if ($stuname) { $home=&homeserver($stuname,$domain); }
2624:
2625: if (!$symb) {
2626: unless ($symb=escape(&symbread())) { return ''; }
2627: } else {
2628: $symb=&escape(&symbclean($symb));
2629: }
2630: if (!$namespace) {
2631: unless ($namespace=$env{'request.course.id'}) {
2632: return '';
2633: }
2634: }
2635: if (!$domain) { $domain=$env{'user.domain'}; }
2636: if (!$stuname) { $stuname=$env{'user.name'}; }
2637: if (!$home) { $home=$env{'user.home'}; }
2638: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2639:
2640: my %returnhash=();
2641: foreach (split(/\&/,$answer)) {
2642: my ($name,$value)=split(/\=/,$_);
2643: $returnhash{&unescape($name)}=&thaw_unescape($value);
2644: }
2645: my $version;
2646: for ($version=1;$version<=$returnhash{'version'};$version++) {
2647: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2648: $returnhash{$_}=$returnhash{$version.':'.$_};
2649: }
2650: }
2651: return %returnhash;
2652: }
2653:
2654: # ---------------------------------------------------------- Course Description
2655:
2656: sub coursedescription {
2657: my ($courseid,$args)=@_;
2658: $courseid=~s/^\///;
2659: $courseid=~s/\_/\//g;
2660: my ($cdomain,$cnum)=split(/\//,$courseid);
2661: my $chome=&homeserver($cnum,$cdomain);
2662: my $normalid=$cdomain.'_'.$cnum;
2663: # need to always cache even if we get errors otherwise we keep
2664: # trying and trying and trying to get the course description.
2665: my %envhash=();
2666: my %returnhash=();
2667:
2668: my $expiretime=600;
2669: if ($env{'request.course.id'} eq $normalid) {
2670: $expiretime=120;
2671: }
2672:
2673: my $prefix='course.'.$cdomain.'_'.$cnum.'.';
2674: if (!$args->{'freshen_cache'}
2675: && ((time-$env{$prefix.'last_cache'}) < $expiretime) ) {
2676: foreach my $key (keys(%env)) {
2677: next if ($key !~ /^\Q$prefix\E(.*)/);
2678: my ($setting) = $1;
2679: $returnhash{$setting} = $env{$key};
2680: }
2681: return %returnhash;
2682: }
2683:
2684: # get the data agin
2685: if (!$args->{'one_time'}) {
2686: $envhash{'course.'.$normalid.'.last_cache'}=time;
2687: }
2688: if ($chome ne 'no_host') {
2689: %returnhash=&dump('environment',$cdomain,$cnum);
2690: if (!exists($returnhash{'con_lost'})) {
2691: $returnhash{'home'}= $chome;
2692: $returnhash{'domain'} = $cdomain;
2693: $returnhash{'num'} = $cnum;
2694: if (!defined($returnhash{'type'})) {
2695: $returnhash{'type'} = 'Course';
2696: }
2697: while (my ($name,$value) = each %returnhash) {
2698: $envhash{'course.'.$normalid.'.'.$name}=$value;
2699: }
2700: $returnhash{'url'}=&clutter($returnhash{'url'});
2701: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2702: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2703: $envhash{'course.'.$normalid.'.home'}=$chome;
2704: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2705: $envhash{'course.'.$normalid.'.num'}=$cnum;
2706: }
2707: }
2708: if (!$args->{'one_time'}) {
2709: &appenv(%envhash);
2710: }
2711: return %returnhash;
2712: }
2713:
2714: # -------------------------------------------------See if a user is privileged
2715:
2716: sub privileged {
2717: my ($username,$domain)=@_;
2718: my $rolesdump=&reply("dump:$domain:$username:roles",
2719: &homeserver($username,$domain));
2720: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2721: my $now=time;
2722: if ($rolesdump ne '') {
2723: foreach (split(/&/,$rolesdump)) {
2724: if ($_!~/^rolesdef_/) {
2725: my ($area,$role)=split(/=/,$_);
2726: $area=~s/\_\w\w$//;
2727: my ($trole,$tend,$tstart)=split(/_/,$role);
2728: if (($trole eq 'dc') || ($trole eq 'su')) {
2729: my $active=1;
2730: if ($tend) {
2731: if ($tend<$now) { $active=0; }
2732: }
2733: if ($tstart) {
2734: if ($tstart>$now) { $active=0; }
2735: }
2736: if ($active) { return 1; }
2737: }
2738: }
2739: }
2740: }
2741: return 0;
2742: }
2743:
2744: # -------------------------------------------------------- Get user privileges
2745:
2746: sub rolesinit {
2747: my ($domain,$username,$authhost)=@_;
2748: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2749: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2750: my %allroles=();
2751: my %allgroups=();
2752: my $now=time;
2753: my %userroles = ('user.login.time' => $now);
2754: my $group_privs;
2755:
2756: if ($rolesdump ne '') {
2757: foreach (split(/&/,$rolesdump)) {
2758: if ($_!~/^rolesdef_/) {
2759: my ($area,$role)=split(/=/,$_);
2760: $area=~s/\_\w\w$//;
2761: my ($trole,$tend,$tstart,$group_privs);
2762: if ($role=~/^cr/) {
2763: if ($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|) {
2764: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2765: ($tend,$tstart)=split('_',$trest);
2766: } else {
2767: $trole=$role;
2768: }
2769: } elsif ($role =~ m|^gr/|) {
2770: ($trole,$tend,$tstart) = split(/_/,$role);
2771: ($trole,$group_privs) = split(/\//,$trole);
2772: $group_privs = &unescape($group_privs);
2773: } else {
2774: ($trole,$tend,$tstart)=split(/_/,$role);
2775: }
2776: my %new_role = &set_arearole($trole,$area,$tstart,$tend,$domain,
2777: $username);
2778: @userroles{keys(%new_role)} = @new_role{keys(%new_role)};
2779: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2780: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2781: if (($area ne '') && ($trole ne '')) {
2782: my $spec=$trole.'.'.$area;
2783: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2784: if ($trole =~ /^cr\//) {
2785: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2786: } elsif ($trole eq 'gr') {
2787: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
2788: } else {
2789: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2790: }
2791: }
2792: }
2793: }
2794: my ($author,$adv) = &set_userprivs(\%userroles,\%allroles,\%allgroups);
2795: $userroles{'user.adv'} = $adv;
2796: $userroles{'user.author'} = $author;
2797: $env{'user.adv'}=$adv;
2798: }
2799: return \%userroles;
2800: }
2801:
2802: sub set_arearole {
2803: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2804: # log the associated role with the area
2805: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2806: return ('user.role.'.$trole.'.'.$area => $tstart.'.'.$tend);
2807: }
2808:
2809: sub custom_roleprivs {
2810: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2811: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2812: my $homsvr=homeserver($rauthor,$rdomain);
2813: if ($hostname{$homsvr} ne '') {
2814: my ($rdummy,$roledef)=
2815: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2816: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2817: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2818: if (defined($syspriv)) {
2819: $$allroles{'cm./'}.=':'.$syspriv;
2820: $$allroles{$spec.'./'}.=':'.$syspriv;
2821: }
2822: if ($tdomain ne '') {
2823: if (defined($dompriv)) {
2824: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2825: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2826: }
2827: if (($trest ne '') && (defined($coursepriv))) {
2828: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2829: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2830: }
2831: }
2832: }
2833: }
2834: }
2835:
2836: sub group_roleprivs {
2837: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
2838: my $access = 1;
2839: my $now = time;
2840: if (($tend!=0) && ($tend<$now)) { $access = 0; }
2841: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
2842: if ($access) {
2843: my ($course,$group) = ($area =~ m|(/\w+/\w+)/([^/]+)$|);
2844: $$allgroups{$course}{$group} .=':'.$group_privs;
2845: }
2846: }
2847:
2848: sub standard_roleprivs {
2849: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2850: if (defined($pr{$trole.':s'})) {
2851: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2852: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2853: }
2854: if ($tdomain ne '') {
2855: if (defined($pr{$trole.':d'})) {
2856: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2857: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2858: }
2859: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2860: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2861: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2862: }
2863: }
2864: }
2865:
2866: sub set_userprivs {
2867: my ($userroles,$allroles,$allgroups) = @_;
2868: my $author=0;
2869: my $adv=0;
2870: my %grouproles = ();
2871: if (keys(%{$allgroups}) > 0) {
2872: foreach my $role (keys %{$allroles}) {
2873: my ($trole,$area,$sec,$extendedarea);
2874: if ($role =~ m-^(\w+|cr/\w+/\w+/\w+)\.(/\w+/\w+)(/?\w*)-) {
2875: $trole = $1;
2876: $area = $2;
2877: $sec = $3;
2878: $extendedarea = $area.$sec;
2879: if (exists($$allgroups{$area})) {
2880: foreach my $group (keys(%{$$allgroups{$area}})) {
2881: my $spec = $trole.'.'.$extendedarea;
2882: $grouproles{$spec.'.'.$area.'/'.$group} =
2883: $$allgroups{$area}{$group};
2884: }
2885: }
2886: }
2887: }
2888: }
2889: foreach (keys(%grouproles)) {
2890: $$allroles{$_} = $grouproles{$_};
2891: }
2892: foreach (keys %{$allroles}) {
2893: my %thesepriv=();
2894: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2895: foreach (split(/:/,$$allroles{$_})) {
2896: if ($_ ne '') {
2897: my ($privilege,$restrictions)=split(/&/,$_);
2898: if ($restrictions eq '') {
2899: $thesepriv{$privilege}='F';
2900: } elsif ($thesepriv{$privilege} ne 'F') {
2901: $thesepriv{$privilege}.=$restrictions;
2902: }
2903: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2904: }
2905: }
2906: my $thesestr='';
2907: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2908: $userroles->{'user.priv.'.$_} = $thesestr;
2909: }
2910: return ($author,$adv);
2911: }
2912:
2913: # --------------------------------------------------------------- get interface
2914:
2915: sub get {
2916: my ($namespace,$storearr,$udomain,$uname)=@_;
2917: my $items='';
2918: foreach (@$storearr) {
2919: $items.=escape($_).'&';
2920: }
2921: $items=~s/\&$//;
2922: if (!$udomain) { $udomain=$env{'user.domain'}; }
2923: if (!$uname) { $uname=$env{'user.name'}; }
2924: my $uhome=&homeserver($uname,$udomain);
2925:
2926: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2927: my @pairs=split(/\&/,$rep);
2928: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2929: return @pairs;
2930: }
2931: my %returnhash=();
2932: my $i=0;
2933: foreach (@$storearr) {
2934: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2935: $i++;
2936: }
2937: return %returnhash;
2938: }
2939:
2940: # --------------------------------------------------------------- del interface
2941:
2942: sub del {
2943: my ($namespace,$storearr,$udomain,$uname)=@_;
2944: my $items='';
2945: foreach (@$storearr) {
2946: $items.=escape($_).'&';
2947: }
2948: $items=~s/\&$//;
2949: if (!$udomain) { $udomain=$env{'user.domain'}; }
2950: if (!$uname) { $uname=$env{'user.name'}; }
2951: my $uhome=&homeserver($uname,$udomain);
2952:
2953: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2954: }
2955:
2956: # -------------------------------------------------------------- dump interface
2957:
2958: sub dump {
2959: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2960: if (!$udomain) { $udomain=$env{'user.domain'}; }
2961: if (!$uname) { $uname=$env{'user.name'}; }
2962: my $uhome=&homeserver($uname,$udomain);
2963: if ($regexp) {
2964: $regexp=&escape($regexp);
2965: } else {
2966: $regexp='.';
2967: }
2968: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
2969: my @pairs=split(/\&/,$rep);
2970: my %returnhash=();
2971: foreach my $item (@pairs) {
2972: my ($key,$value)=split(/=/,$item,2);
2973: $key = &unescape($key);
2974: next if ($key =~ /^error: 2 /);
2975: $returnhash{$key}=&thaw_unescape($value);
2976: }
2977: return %returnhash;
2978: }
2979:
2980: # --------------------------------------------------------- dumpstore interface
2981:
2982: sub dumpstore {
2983: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2984: return &dump($namespace,$udomain,$uname,$regexp,$range);
2985: }
2986:
2987: # -------------------------------------------------------------- keys interface
2988:
2989: sub getkeys {
2990: my ($namespace,$udomain,$uname)=@_;
2991: if (!$udomain) { $udomain=$env{'user.domain'}; }
2992: if (!$uname) { $uname=$env{'user.name'}; }
2993: my $uhome=&homeserver($uname,$udomain);
2994: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2995: my @keyarray=();
2996: foreach (split(/\&/,$rep)) {
2997: push (@keyarray,&unescape($_));
2998: }
2999: return @keyarray;
3000: }
3001:
3002: # --------------------------------------------------------------- currentdump
3003: sub currentdump {
3004: my ($courseid,$sdom,$sname)=@_;
3005: $courseid = $env{'request.course.id'} if (! defined($courseid));
3006: $sdom = $env{'user.domain'} if (! defined($sdom));
3007: $sname = $env{'user.name'} if (! defined($sname));
3008: my $uhome = &homeserver($sname,$sdom);
3009: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
3010: return if ($rep =~ /^(error:|no_such_host)/);
3011: #
3012: my %returnhash=();
3013: #
3014: if ($rep eq "unknown_cmd") {
3015: # an old lond will not know currentdump
3016: # Do a dump and make it look like a currentdump
3017: my @tmp = &dump($courseid,$sdom,$sname,'.');
3018: return if ($tmp[0] =~ /^(error:|no_such_host)/);
3019: my %hash = @tmp;
3020: @tmp=();
3021: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
3022: } else {
3023: my @pairs=split(/\&/,$rep);
3024: foreach (@pairs) {
3025: my ($key,$value)=split(/=/,$_);
3026: my ($symb,$param) = split(/:/,$key);
3027: $returnhash{&unescape($symb)}->{&unescape($param)} =
3028: &thaw_unescape($value);
3029: }
3030: }
3031: return %returnhash;
3032: }
3033:
3034: sub convert_dump_to_currentdump{
3035: my %hash = %{shift()};
3036: my %returnhash;
3037: # Code ripped from lond, essentially. The only difference
3038: # here is the unescaping done by lonnet::dump(). Conceivably
3039: # we might run in to problems with parameter names =~ /^v\./
3040: while (my ($key,$value) = each(%hash)) {
3041: my ($v,$symb,$param) = split(/:/,$key);
3042: next if ($v eq 'version' || $symb eq 'keys');
3043: next if (exists($returnhash{$symb}) &&
3044: exists($returnhash{$symb}->{$param}) &&
3045: $returnhash{$symb}->{'v.'.$param} > $v);
3046: $returnhash{$symb}->{$param}=$value;
3047: $returnhash{$symb}->{'v.'.$param}=$v;
3048: }
3049: #
3050: # Remove all of the keys in the hashes which keep track of
3051: # the version of the parameter.
3052: while (my ($symb,$param_hash) = each(%returnhash)) {
3053: # use a foreach because we are going to delete from the hash.
3054: foreach my $key (keys(%$param_hash)) {
3055: delete($param_hash->{$key}) if ($key =~ /^v\./);
3056: }
3057: }
3058: return \%returnhash;
3059: }
3060:
3061: # ------------------------------------------------------ critical inc interface
3062:
3063: sub cinc {
3064: return &inc(@_,'critical');
3065: }
3066:
3067: # --------------------------------------------------------------- inc interface
3068:
3069: sub inc {
3070: my ($namespace,$store,$udomain,$uname,$critical) = @_;
3071: if (!$udomain) { $udomain=$env{'user.domain'}; }
3072: if (!$uname) { $uname=$env{'user.name'}; }
3073: my $uhome=&homeserver($uname,$udomain);
3074: my $items='';
3075: if (! ref($store)) {
3076: # got a single value, so use that instead
3077: $items = &escape($store).'=&';
3078: } elsif (ref($store) eq 'SCALAR') {
3079: $items = &escape($$store).'=&';
3080: } elsif (ref($store) eq 'ARRAY') {
3081: $items = join('=&',map {&escape($_);} @{$store});
3082: } elsif (ref($store) eq 'HASH') {
3083: while (my($key,$value) = each(%{$store})) {
3084: $items.= &escape($key).'='.&escape($value).'&';
3085: }
3086: }
3087: $items=~s/\&$//;
3088: if ($critical) {
3089: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
3090: } else {
3091: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
3092: }
3093: }
3094:
3095: # --------------------------------------------------------------- put interface
3096:
3097: sub put {
3098: my ($namespace,$storehash,$udomain,$uname)=@_;
3099: if (!$udomain) { $udomain=$env{'user.domain'}; }
3100: if (!$uname) { $uname=$env{'user.name'}; }
3101: my $uhome=&homeserver($uname,$udomain);
3102: my $items='';
3103: foreach (keys %$storehash) {
3104: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3105: }
3106: $items=~s/\&$//;
3107: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3108: }
3109:
3110: # ------------------------------------------------------------ newput interface
3111:
3112: sub newput {
3113: my ($namespace,$storehash,$udomain,$uname)=@_;
3114: if (!$udomain) { $udomain=$env{'user.domain'}; }
3115: if (!$uname) { $uname=$env{'user.name'}; }
3116: my $uhome=&homeserver($uname,$udomain);
3117: my $items='';
3118: foreach my $key (keys(%$storehash)) {
3119: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3120: }
3121: $items=~s/\&$//;
3122: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
3123: }
3124:
3125: # --------------------------------------------------------- putstore interface
3126:
3127: sub putstore {
3128: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3129: if (!$udomain) { $udomain=$env{'user.domain'}; }
3130: if (!$uname) { $uname=$env{'user.name'}; }
3131: my $uhome=&homeserver($uname,$udomain);
3132: my $items='';
3133: foreach my $key (keys(%$storehash)) {
3134: $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
3135: }
3136: $items=~s/\&$//;
3137: my $esc_symb=&escape($symb);
3138: my $esc_v=&escape($version);
3139: my $reply =
3140: &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
3141: $uhome);
3142: if ($reply eq 'unknown_cmd') {
3143: # gfall back to way things use to be done
3144: return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
3145: $uname);
3146: }
3147: return $reply;
3148: }
3149:
3150: sub old_putstore {
3151: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3152: if (!$udomain) { $udomain=$env{'user.domain'}; }
3153: if (!$uname) { $uname=$env{'user.name'}; }
3154: my $uhome=&homeserver($uname,$udomain);
3155: my %newstorehash;
3156: foreach (keys %$storehash) {
3157: my $key = $version.':'.&escape($symb).':'.$_;
3158: $newstorehash{$key} = $storehash->{$_};
3159: }
3160: my $items='';
3161: my %allitems = ();
3162: foreach (keys %newstorehash) {
3163: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
3164: my $key = $1.':keys:'.$2;
3165: $allitems{$key} .= $3.':';
3166: }
3167: $items.=$_.'='.&freeze_escape($newstorehash{$_}).'&';
3168: }
3169: foreach (keys %allitems) {
3170: $allitems{$_} =~ s/\:$//;
3171: $items.= $_.'='.$allitems{$_}.'&';
3172: }
3173: $items=~s/\&$//;
3174: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3175: }
3176:
3177: # ------------------------------------------------------ critical put interface
3178:
3179: sub cput {
3180: my ($namespace,$storehash,$udomain,$uname)=@_;
3181: if (!$udomain) { $udomain=$env{'user.domain'}; }
3182: if (!$uname) { $uname=$env{'user.name'}; }
3183: my $uhome=&homeserver($uname,$udomain);
3184: my $items='';
3185: foreach (keys %$storehash) {
3186: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3187: }
3188: $items=~s/\&$//;
3189: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
3190: }
3191:
3192: # -------------------------------------------------------------- eget interface
3193:
3194: sub eget {
3195: my ($namespace,$storearr,$udomain,$uname)=@_;
3196: my $items='';
3197: foreach (@$storearr) {
3198: $items.=escape($_).'&';
3199: }
3200: $items=~s/\&$//;
3201: if (!$udomain) { $udomain=$env{'user.domain'}; }
3202: if (!$uname) { $uname=$env{'user.name'}; }
3203: my $uhome=&homeserver($uname,$udomain);
3204: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3205: my @pairs=split(/\&/,$rep);
3206: my %returnhash=();
3207: my $i=0;
3208: foreach (@$storearr) {
3209: $returnhash{$_}=&thaw_unescape($pairs[$i]);
3210: $i++;
3211: }
3212: return %returnhash;
3213: }
3214:
3215: # ------------------------------------------------------------ tmpput interface
3216: sub tmpput {
3217: my ($storehash,$server)=@_;
3218: my $items='';
3219: foreach (keys(%$storehash)) {
3220: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3221: }
3222: $items=~s/\&$//;
3223: return &reply("tmpput:$items",$server);
3224: }
3225:
3226: # ------------------------------------------------------------ tmpget interface
3227: sub tmpget {
3228: my ($token,$server)=@_;
3229: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3230: my $rep=&reply("tmpget:$token",$server);
3231: my %returnhash;
3232: foreach my $item (split(/\&/,$rep)) {
3233: my ($key,$value)=split(/=/,$item);
3234: $returnhash{&unescape($key)}=&thaw_unescape($value);
3235: }
3236: return %returnhash;
3237: }
3238:
3239: # ------------------------------------------------------------ tmpget interface
3240: sub tmpdel {
3241: my ($token,$server)=@_;
3242: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3243: return &reply("tmpdel:$token",$server);
3244: }
3245:
3246: # -------------------------------------------------- portfolio access checking
3247:
3248: sub portfolio_access {
3249: my ($requrl) = @_;
3250: my (undef,$udom,$unum,$file_name,$group) = &parse_portfolio_url($requrl);
3251: my $result = &get_portfolio_access($udom,$unum,$file_name,$group);
3252: if ($result eq 'ok') {
3253: return 'F';
3254: } elsif ($result =~ /^[^:]+:guest_/) {
3255: return 'A';
3256: }
3257: return '';
3258: }
3259:
3260: sub get_portfolio_access {
3261: my ($udom,$unum,$file_name,$group,$access_hash) = @_;
3262:
3263: if (!ref($access_hash)) {
3264: my $current_perms = &get_portfile_permissions($udom,$unum);
3265: my %access_controls = &get_access_controls($current_perms,$group,
3266: $file_name);
3267: $access_hash = $access_controls{$file_name};
3268: }
3269:
3270: my ($public,$guest,@domains,@users,@courses,@groups);
3271: my $now = time;
3272: if (ref($access_hash) eq 'HASH') {
3273: foreach my $key (keys(%{$access_hash})) {
3274: my ($num,$scope,$end,$start) = ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
3275: if ($start > $now) {
3276: next;
3277: }
3278: if ($end && $end<$now) {
3279: next;
3280: }
3281: if ($scope eq 'public') {
3282: $public = $key;
3283: last;
3284: } elsif ($scope eq 'guest') {
3285: $guest = $key;
3286: } elsif ($scope eq 'domains') {
3287: push(@domains,$key);
3288: } elsif ($scope eq 'users') {
3289: push(@users,$key);
3290: } elsif ($scope eq 'course') {
3291: push(@courses,$key);
3292: } elsif ($scope eq 'group') {
3293: push(@groups,$key);
3294: }
3295: }
3296: if ($public) {
3297: return 'ok';
3298: }
3299: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3300: if ($guest) {
3301: return $guest;
3302: }
3303: } else {
3304: if (@domains > 0) {
3305: foreach my $domkey (@domains) {
3306: if (ref($access_hash->{$domkey}{'dom'}) eq 'ARRAY') {
3307: if (grep(/^\Q$env{'user.domain'}\E$/,@{$access_hash->{$domkey}{'dom'}})) {
3308: return 'ok';
3309: }
3310: }
3311: }
3312: }
3313: if (@users > 0) {
3314: foreach my $userkey (@users) {
3315: if (exists($access_hash->{$userkey}{'users'}{$env{'user.name'}.':'.$env{'user.domain'}})) {
3316: return 'ok';
3317: }
3318: }
3319: }
3320: my %roleshash;
3321: my @courses_and_groups = @courses;
3322: push(@courses_and_groups,@groups);
3323: if (@courses_and_groups > 0) {
3324: my (%allgroups,%allroles);
3325: my ($start,$end,$role,$sec,$group);
3326: foreach my $envkey (%env) {
3327: if ($envkey =~ m-^user\.role\.(gr|cc|in|ta|ep|st)\./([^/]+)/([^/]+)/?([^/]*)$-) {
3328: my $cid = $2.'_'.$3;
3329: if ($1 eq 'gr') {
3330: $group = $4;
3331: $allgroups{$cid}{$group} = $env{$envkey};
3332: } else {
3333: if ($4 eq '') {
3334: $sec = 'none';
3335: } else {
3336: $sec = $4;
3337: }
3338: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3339: }
3340: } elsif ($envkey =~ m-^user\.role\./cr/(\w+/\w+/\w*)./([^/]+)/([^/]+)/?([^/]*)$-) {
3341: my $cid = $2.'_'.$3;
3342: if ($4 eq '') {
3343: $sec = 'none';
3344: } else {
3345: $sec = $4;
3346: }
3347: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3348: }
3349: }
3350: if (keys(%allroles) == 0) {
3351: return;
3352: }
3353: foreach my $key (@courses_and_groups) {
3354: my %content = %{$$access_hash{$key}};
3355: my $cnum = $content{'number'};
3356: my $cdom = $content{'domain'};
3357: my $cid = $cdom.'_'.$cnum;
3358: if (!exists($allroles{$cid})) {
3359: next;
3360: }
3361: foreach my $role_id (keys(%{$content{'roles'}})) {
3362: my @sections = @{$content{'roles'}{$role_id}{'section'}};
3363: my @groups = @{$content{'roles'}{$role_id}{'group'}};
3364: my @status = @{$content{'roles'}{$role_id}{'access'}};
3365: my @roles = @{$content{'roles'}{$role_id}{'role'}};
3366: foreach my $role (keys(%{$allroles{$cid}})) {
3367: if ((grep/^all$/,@roles) || (grep/^\Q$role\E$/,@roles)) {
3368: foreach my $sec (keys(%{$allroles{$cid}{$role}})) {
3369: if (&course_group_datechecker($allroles{$cid}{$role}{$sec},$now,\@status) eq 'ok') {
3370: if (grep/^all$/,@sections) {
3371: return 'ok';
3372: } else {
3373: if (grep/^$sec$/,@sections) {
3374: return 'ok';
3375: }
3376: }
3377: }
3378: }
3379: if (keys(%{$allgroups{$cid}}) == 0) {
3380: if (grep/^none$/,@groups) {
3381: return 'ok';
3382: }
3383: } else {
3384: if (grep/^all$/,@groups) {
3385: return 'ok';
3386: }
3387: foreach my $group (keys(%{$allgroups{$cid}})) {
3388: if (grep/^$group$/,@groups) {
3389: return 'ok';
3390: }
3391: }
3392: }
3393: }
3394: }
3395: }
3396: }
3397: }
3398: if ($guest) {
3399: return $guest;
3400: }
3401: }
3402: }
3403: return;
3404: }
3405:
3406: sub course_group_datechecker {
3407: my ($dates,$now,$status) = @_;
3408: my ($start,$end) = split(/\./,$dates);
3409: if (!$start && !$end) {
3410: return 'ok';
3411: }
3412: if (grep/^active$/,@{$status}) {
3413: if (((!$start) || ($start && $start <= $now)) && ((!$end) || ($end && $end >= $now))) {
3414: return 'ok';
3415: }
3416: }
3417: if (grep/^previous$/,@{$status}) {
3418: if ($end > $now ) {
3419: return 'ok';
3420: }
3421: }
3422: if (grep/^future$/,@{$status}) {
3423: if ($start > $now) {
3424: return 'ok';
3425: }
3426: }
3427: return;
3428: }
3429:
3430: sub parse_portfolio_url {
3431: my ($url) = @_;
3432:
3433: my ($type,$udom,$unum,$group,$file_name);
3434:
3435: if ($url =~ m-^/*uploaded/([^/]+)/([^/]+)/portfolio(/.+)$-) {
3436: $type = 1;
3437: $udom = $1;
3438: $unum = $2;
3439: $file_name = $3;
3440: } elsif ($url =~ m-^/*uploaded/([^/]+)/([^/]+)/groups/([^/]+)/portfolio/(.+)$-) {
3441: $type = 2;
3442: $udom = $1;
3443: $unum = $2;
3444: $group = $3;
3445: $file_name = $3.'/'.$4;
3446: }
3447: if (wantarray) {
3448: return ($type,$udom,$unum,$file_name,$group);
3449: }
3450: return $type;
3451: }
3452:
3453: sub is_portfolio_url {
3454: my ($url) = @_;
3455: return scalar(&parse_portfolio_url($url));
3456: }
3457:
3458: # ---------------------------------------------- Custom access rule evaluation
3459:
3460: sub customaccess {
3461: my ($priv,$uri)=@_;
3462: my ($urole,$urealm)=split(/\./,$env{'request.role'});
3463: $urealm=~s/^\W//;
3464: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
3465: my $access=0;
3466: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
3467: my ($effect,$realm,$role)=split(/\:/,$_);
3468: if ($role) {
3469: if ($role ne $urole) { next; }
3470: }
3471: foreach (split(/\s*\,\s*/,$realm)) {
3472: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
3473: if ($tdom) {
3474: if ($tdom ne $udom) { next; }
3475: }
3476: if ($tcrs) {
3477: if ($tcrs ne $ucrs) { next; }
3478: }
3479: if ($tsec) {
3480: if ($tsec ne $usec) { next; }
3481: }
3482: $access=($effect eq 'allow');
3483: last;
3484: }
3485: if ($realm eq '' && $role eq '') {
3486: $access=($effect eq 'allow');
3487: }
3488: }
3489: return $access;
3490: }
3491:
3492: # ------------------------------------------------- Check for a user privilege
3493:
3494: sub allowed {
3495: my ($priv,$uri,$symb)=@_;
3496: my $ver_orguri=$uri;
3497: $uri=&deversion($uri);
3498: my $orguri=$uri;
3499: $uri=&declutter($uri);
3500:
3501: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3502: # Free bre access to adm and meta resources
3503: if (((($uri=~/^adm\//) && ($uri !~ m{/(?:smppg|bulletinboard)$}))
3504: || (($uri=~/\.meta$/) && ($uri!~m|^uploaded/|) ))
3505: && ($priv eq 'bre')) {
3506: return 'F';
3507: }
3508:
3509: # Free bre access to user's own portfolio contents
3510: my ($space,$domain,$name,@dir)=split('/',$uri);
3511: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3512: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
3513: return 'F';
3514: }
3515:
3516: # bre access to group portfolio for rgf priv in group, or mdg or vcg in course.
3517: if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
3518: && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
3519: if (exists($env{'request.course.id'})) {
3520: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
3521: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
3522: if (($domain eq $cdom) && ($name eq $cnum)) {
3523: my $courseprivid=$env{'request.course.id'};
3524: $courseprivid=~s/\_/\//;
3525: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
3526: .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
3527: return $1;
3528: } else {
3529: if ($env{'request.course.sec'}) {
3530: $courseprivid.='/'.$env{'request.course.sec'};
3531: }
3532: if ($env{'user.priv.'.$env{'request.role'}.'./'.
3533: $courseprivid} =~/(mdg|vcg)\&([^\:]*)/) {
3534: return $2;
3535: }
3536: }
3537: }
3538: }
3539: }
3540:
3541: # Free bre to public access
3542:
3543: if ($priv eq 'bre') {
3544: my $copyright=&metadata($uri,'copyright');
3545: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3546: return 'F';
3547: }
3548: if ($copyright eq 'priv') {
3549: $uri=~/([^\/]+)\/([^\/]+)\//;
3550: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3551: return '';
3552: }
3553: }
3554: if ($copyright eq 'domain') {
3555: $uri=~/([^\/]+)\/([^\/]+)\//;
3556: unless (($env{'user.domain'} eq $1) ||
3557: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3558: return '';
3559: }
3560: }
3561: if ($env{'request.role'}=~ /li\.\//) {
3562: # Library role, so allow browsing of resources in this domain.
3563: return 'F';
3564: }
3565: if ($copyright eq 'custom') {
3566: unless (&customaccess($priv,$uri)) { return ''; }
3567: }
3568: }
3569: # Domain coordinator is trying to create a course
3570: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3571: # uri is the requested domain in this case.
3572: # comparison to 'request.role.domain' shows if the user has selected
3573: # a role of dc for the domain in question.
3574: return 'F' if ($uri eq $env{'request.role.domain'});
3575: }
3576:
3577: my $thisallowed='';
3578: my $statecond=0;
3579: my $courseprivid='';
3580:
3581: # Course
3582:
3583: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3584: $thisallowed.=$1;
3585: }
3586:
3587: # Domain
3588:
3589: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3590: =~/\Q$priv\E\&([^\:]*)/) {
3591: $thisallowed.=$1;
3592: }
3593:
3594: # Course: uri itself is a course
3595: my $courseuri=$uri;
3596: $courseuri=~s/\_(\d)/\/$1/;
3597: $courseuri=~s/^([^\/])/\/$1/;
3598:
3599: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3600: =~/\Q$priv\E\&([^\:]*)/) {
3601: $thisallowed.=$1;
3602: }
3603:
3604: # URI is an uploaded document for this course, default permissions don't matter
3605: # not allowing 'edit' access (editupload) to uploaded course docs
3606: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3607: $thisallowed='';
3608: my ($match)=&is_on_map($uri);
3609: if ($match) {
3610: if ($env{'user.priv.'.$env{'request.role'}.'./'}
3611: =~/\Q$priv\E\&([^\:]*)/) {
3612: $thisallowed.=$1;
3613: }
3614: } else {
3615: my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
3616: if ($refuri) {
3617: if ($refuri =~ m|^/adm/|) {
3618: $thisallowed='F';
3619: } else {
3620: $refuri=&declutter($refuri);
3621: my ($match) = &is_on_map($refuri);
3622: if ($match) {
3623: $thisallowed='F';
3624: }
3625: }
3626: }
3627: }
3628: }
3629:
3630: if ($priv eq 'bre'
3631: && $thisallowed ne 'F'
3632: && $thisallowed ne '2'
3633: && &is_portfolio_url($uri)) {
3634: $thisallowed = &portfolio_access($uri);
3635: }
3636:
3637: # Full access at system, domain or course-wide level? Exit.
3638:
3639: if ($thisallowed=~/F/) {
3640: return 'F';
3641: }
3642:
3643: # If this is generating or modifying users, exit with special codes
3644:
3645: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3646: if (($priv eq 'cca') || ($priv eq 'caa')) {
3647: my ($audom,$auname)=split('/',$uri);
3648: # no author name given, so this just checks on the general right to make a co-author in this domain
3649: unless ($auname) { return $thisallowed; }
3650: # an author name is given, so we are about to actually make a co-author for a certain account
3651: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3652: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3653: ($audom ne $env{'request.role.domain'}))) { return ''; }
3654: }
3655: return $thisallowed;
3656: }
3657: #
3658: # Gathered so far: system, domain and course wide privileges
3659: #
3660: # Course: See if uri or referer is an individual resource that is part of
3661: # the course
3662:
3663: if ($env{'request.course.id'}) {
3664:
3665: $courseprivid=$env{'request.course.id'};
3666: if ($env{'request.course.sec'}) {
3667: $courseprivid.='/'.$env{'request.course.sec'};
3668: }
3669: $courseprivid=~s/\_/\//;
3670: my $checkreferer=1;
3671: my ($match,$cond)=&is_on_map($uri);
3672: if ($match) {
3673: $statecond=$cond;
3674: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3675: =~/\Q$priv\E\&([^\:]*)/) {
3676: $thisallowed.=$1;
3677: $checkreferer=0;
3678: }
3679: }
3680:
3681: if ($checkreferer) {
3682: my $refuri=$env{'httpref.'.$orguri};
3683: unless ($refuri) {
3684: foreach (keys %env) {
3685: if ($_=~/^httpref\..*\*/) {
3686: my $pattern=$_;
3687: $pattern=~s/^httpref\.\/res\///;
3688: $pattern=~s/\*/\[\^\/\]\+/g;
3689: $pattern=~s/\//\\\//g;
3690: if ($orguri=~/$pattern/) {
3691: $refuri=$env{$_};
3692: }
3693: }
3694: }
3695: }
3696:
3697: if ($refuri) {
3698: $refuri=&declutter($refuri);
3699: my ($match,$cond)=&is_on_map($refuri);
3700: if ($match) {
3701: my $refstatecond=$cond;
3702: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3703: =~/\Q$priv\E\&([^\:]*)/) {
3704: $thisallowed.=$1;
3705: $uri=$refuri;
3706: $statecond=$refstatecond;
3707: }
3708: }
3709: }
3710: }
3711: }
3712:
3713: #
3714: # Gathered now: all privileges that could apply, and condition number
3715: #
3716: #
3717: # Full or no access?
3718: #
3719:
3720: if ($thisallowed=~/F/) {
3721: return 'F';
3722: }
3723:
3724: unless ($thisallowed) {
3725: return '';
3726: }
3727:
3728: # Restrictions exist, deal with them
3729: #
3730: # C:according to course preferences
3731: # R:according to resource settings
3732: # L:unless locked
3733: # X:according to user session state
3734: #
3735:
3736: # Possibly locked functionality, check all courses
3737: # Locks might take effect only after 10 minutes cache expiration for other
3738: # courses, and 2 minutes for current course
3739:
3740: my $envkey;
3741: if ($thisallowed=~/L/) {
3742: foreach $envkey (keys %env) {
3743: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3744: my $courseid=$2;
3745: my $roleid=$1.'.'.$2;
3746: $courseid=~s/^\///;
3747: my $expiretime=600;
3748: if ($env{'request.role'} eq $roleid) {
3749: $expiretime=120;
3750: }
3751: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3752: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3753: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3754: &coursedescription($courseid,{'freshen_cache' => 1});
3755: }
3756: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3757: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3758: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3759: &log($env{'user.domain'},$env{'user.name'},
3760: $env{'user.home'},
3761: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3762: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3763: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3764: return '';
3765: }
3766: }
3767: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3768: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3769: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3770: &log($env{'user.domain'},$env{'user.name'},
3771: $env{'user.home'},
3772: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3773: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3774: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3775: return '';
3776: }
3777: }
3778: }
3779: }
3780: }
3781:
3782: #
3783: # Rest of the restrictions depend on selected course
3784: #
3785:
3786: unless ($env{'request.course.id'}) {
3787: if ($thisallowed eq 'A') {
3788: return 'A';
3789: } else {
3790: return '1';
3791: }
3792: }
3793:
3794: #
3795: # Now user is definitely in a course
3796: #
3797:
3798:
3799: # Course preferences
3800:
3801: if ($thisallowed=~/C/) {
3802: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3803: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
3804: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
3805: =~/\Q$rolecode\E/) {
3806: if ($priv ne 'pch') {
3807: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3808: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3809: $env{'request.course.id'});
3810: }
3811: return '';
3812: }
3813:
3814: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
3815: =~/\Q$unamedom\E/) {
3816: if ($priv ne 'pch') {
3817: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
3818: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3819: $env{'request.course.id'});
3820: }
3821: return '';
3822: }
3823: }
3824:
3825: # Resource preferences
3826:
3827: if ($thisallowed=~/R/) {
3828: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3829: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3830: if ($priv ne 'pch') {
3831: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3832: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3833: }
3834: return '';
3835: }
3836: }
3837:
3838: # Restricted by state or randomout?
3839:
3840: if ($thisallowed=~/X/) {
3841: if ($env{'acc.randomout'}) {
3842: if (!$symb) { $symb=&symbread($uri,1); }
3843: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3844: return '';
3845: }
3846: }
3847: if (&condval($statecond)) {
3848: return '2';
3849: } else {
3850: return '';
3851: }
3852: }
3853:
3854: if ($thisallowed eq 'A') {
3855: return 'A';
3856: }
3857: return 'F';
3858: }
3859:
3860: sub split_uri_for_cond {
3861: my $uri=&deversion(&declutter(shift));
3862: my @uriparts=split(/\//,$uri);
3863: my $filename=pop(@uriparts);
3864: my $pathname=join('/',@uriparts);
3865: return ($pathname,$filename);
3866: }
3867: # --------------------------------------------------- Is a resource on the map?
3868:
3869: sub is_on_map {
3870: my ($pathname,$filename) = &split_uri_for_cond(shift);
3871: #Trying to find the conditional for the file
3872: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3873: /\&\Q$filename\E\:([\d\|]+)\&/);
3874: if ($match) {
3875: return (1,$1);
3876: } else {
3877: return (0,0);
3878: }
3879: }
3880:
3881: # --------------------------------------------------------- Get symb from alias
3882:
3883: sub get_symb_from_alias {
3884: my $symb=shift;
3885: my ($map,$resid,$url)=&decode_symb($symb);
3886: # Already is a symb
3887: if ($url) { return $symb; }
3888: # Must be an alias
3889: my $aliassymb='';
3890: my %bighash;
3891: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
3892: &GDBM_READER(),0640)) {
3893: my $rid=$bighash{'mapalias_'.$symb};
3894: if ($rid) {
3895: my ($mapid,$resid)=split(/\./,$rid);
3896: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3897: $resid,$bighash{'src_'.$rid});
3898: }
3899: untie %bighash;
3900: }
3901: return $aliassymb;
3902: }
3903:
3904: # ----------------------------------------------------------------- Define Role
3905:
3906: sub definerole {
3907: if (allowed('mcr','/')) {
3908: my ($rolename,$sysrole,$domrole,$courole)=@_;
3909: foreach (split(':',$sysrole)) {
3910: my ($crole,$cqual)=split(/\&/,$_);
3911: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3912: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3913: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3914: return "refused:s:$crole&$cqual";
3915: }
3916: }
3917: }
3918: foreach (split(':',$domrole)) {
3919: my ($crole,$cqual)=split(/\&/,$_);
3920: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3921: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3922: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3923: return "refused:d:$crole&$cqual";
3924: }
3925: }
3926: }
3927: foreach (split(':',$courole)) {
3928: my ($crole,$cqual)=split(/\&/,$_);
3929: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3930: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3931: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3932: return "refused:c:$crole&$cqual";
3933: }
3934: }
3935: }
3936: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3937: "$env{'user.domain'}:$env{'user.name'}:".
3938: "rolesdef_$rolename=".
3939: escape($sysrole.'_'.$domrole.'_'.$courole);
3940: return reply($command,$env{'user.home'});
3941: } else {
3942: return 'refused';
3943: }
3944: }
3945:
3946: # ---------------- Make a metadata query against the network of library servers
3947:
3948: sub metadata_query {
3949: my ($query,$custom,$customshow,$server_array)=@_;
3950: my %rhash;
3951: my @server_list = (defined($server_array) ? @$server_array
3952: : keys(%libserv) );
3953: for my $server (@server_list) {
3954: unless ($custom or $customshow) {
3955: my $reply=&reply("querysend:".&escape($query),$server);
3956: $rhash{$server}=$reply;
3957: }
3958: else {
3959: my $reply=&reply("querysend:".&escape($query).':'.
3960: &escape($custom).':'.&escape($customshow),
3961: $server);
3962: $rhash{$server}=$reply;
3963: }
3964: }
3965: return \%rhash;
3966: }
3967:
3968: # ----------------------------------------- Send log queries and wait for reply
3969:
3970: sub log_query {
3971: my ($uname,$udom,$query,%filters)=@_;
3972: my $uhome=&homeserver($uname,$udom);
3973: if ($uhome eq 'no_host') { return 'error: no_host'; }
3974: my $uhost=$hostname{$uhome};
3975: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3976: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3977: $uhome);
3978: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3979: return get_query_reply($queryid);
3980: }
3981:
3982: # ------- Request retrieval of institutional classlists for course(s)
3983:
3984: sub fetch_enrollment_query {
3985: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3986: my $homeserver;
3987: my $maxtries = 1;
3988: if ($context eq 'automated') {
3989: $homeserver = $perlvar{'lonHostID'};
3990: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3991: } else {
3992: $homeserver = &homeserver($cnum,$dom);
3993: }
3994: my $host=$hostname{$homeserver};
3995: my $cmd = '';
3996: foreach (keys %{$affiliatesref}) {
3997: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3998: }
3999: $cmd =~ s/%%$//;
4000: $cmd = &escape($cmd);
4001: my $query = 'fetchenrollment';
4002: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
4003: unless ($queryid=~/^\Q$host\E\_/) {
4004: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
4005: return 'error: '.$queryid;
4006: }
4007: my $reply = &get_query_reply($queryid);
4008: my $tries = 1;
4009: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4010: $reply = &get_query_reply($queryid);
4011: $tries ++;
4012: }
4013: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4014: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4015: } else {
4016: my @responses = split/:/,$reply;
4017: if ($homeserver eq $perlvar{'lonHostID'}) {
4018: foreach (@responses) {
4019: my ($key,$value) = split/=/,$_;
4020: $$replyref{$key} = $value;
4021: }
4022: } else {
4023: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
4024: foreach (@responses) {
4025: my ($key,$value) = split/=/,$_;
4026: $$replyref{$key} = $value;
4027: if ($value > 0) {
4028: foreach (@{$$affiliatesref{$key}}) {
4029: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
4030: my $destname = $pathname.'/'.$filename;
4031: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
4032: if ($xml_classlist =~ /^error/) {
4033: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
4034: } else {
4035: if ( open(FILE,">$destname") ) {
4036: print FILE &unescape($xml_classlist);
4037: close(FILE);
4038: } else {
4039: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
4040: }
4041: }
4042: }
4043: }
4044: }
4045: }
4046: return 'ok';
4047: }
4048: return 'error';
4049: }
4050:
4051: sub get_query_reply {
4052: my $queryid=shift;
4053: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
4054: my $reply='';
4055: for (1..100) {
4056: sleep 2;
4057: if (-e $replyfile.'.end') {
4058: if (open(my $fh,$replyfile)) {
4059: $reply.=<$fh>;
4060: close($fh);
4061: } else { return 'error: reply_file_error'; }
4062: return &unescape($reply);
4063: }
4064: }
4065: return 'timeout:'.$queryid;
4066: }
4067:
4068: sub courselog_query {
4069: #
4070: # possible filters:
4071: # url: url or symb
4072: # username
4073: # domain
4074: # action: view, submit, grade
4075: # start: timestamp
4076: # end: timestamp
4077: #
4078: my (%filters)=@_;
4079: unless ($env{'request.course.id'}) { return 'no_course'; }
4080: if ($filters{'url'}) {
4081: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
4082: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
4083: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
4084: }
4085: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
4086: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
4087: return &log_query($cname,$cdom,'courselog',%filters);
4088: }
4089:
4090: sub userlog_query {
4091: my ($uname,$udom,%filters)=@_;
4092: return &log_query($uname,$udom,'userlog',%filters);
4093: }
4094:
4095: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
4096:
4097: sub auto_run {
4098: my ($cnum,$cdom) = @_;
4099: my $homeserver = &homeserver($cnum,$cdom);
4100: my $response = &reply('autorun:'.$cdom,$homeserver);
4101: return $response;
4102: }
4103:
4104: sub auto_get_sections {
4105: my ($cnum,$cdom,$inst_coursecode) = @_;
4106: my $homeserver = &homeserver($cnum,$cdom);
4107: my @secs = ();
4108: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
4109: unless ($response eq 'refused') {
4110: @secs = split/:/,$response;
4111: }
4112: return @secs;
4113: }
4114:
4115: sub auto_new_course {
4116: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
4117: my $homeserver = &homeserver($cnum,$cdom);
4118: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
4119: return $response;
4120: }
4121:
4122: sub auto_validate_courseID {
4123: my ($cnum,$cdom,$inst_course_id) = @_;
4124: my $homeserver = &homeserver($cnum,$cdom);
4125: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
4126: return $response;
4127: }
4128:
4129: sub auto_create_password {
4130: my ($cnum,$cdom,$authparam) = @_;
4131: my $homeserver = &homeserver($cnum,$cdom);
4132: my $create_passwd = 0;
4133: my $authchk = '';
4134: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
4135: if ($response eq 'refused') {
4136: $authchk = 'refused';
4137: } else {
4138: ($authparam,$create_passwd,$authchk) = split/:/,$response;
4139: }
4140: return ($authparam,$create_passwd,$authchk);
4141: }
4142:
4143: sub auto_photo_permission {
4144: my ($cnum,$cdom,$students) = @_;
4145: my $homeserver = &homeserver($cnum,$cdom);
4146: my ($outcome,$perm_reqd,$conditions) =
4147: split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
4148: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4149: return (undef,undef);
4150: }
4151: return ($outcome,$perm_reqd,$conditions);
4152: }
4153:
4154: sub auto_checkphotos {
4155: my ($uname,$udom,$pid) = @_;
4156: my $homeserver = &homeserver($uname,$udom);
4157: my ($result,$resulttype);
4158: my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
4159: &escape($uname).':'.&escape($pid),
4160: $homeserver));
4161: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4162: return (undef,undef);
4163: }
4164: if ($outcome) {
4165: ($result,$resulttype) = split(/:/,$outcome);
4166: }
4167: return ($result,$resulttype);
4168: }
4169:
4170: sub auto_photochoice {
4171: my ($cnum,$cdom) = @_;
4172: my $homeserver = &homeserver($cnum,$cdom);
4173: my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
4174: &escape($cdom),
4175: $homeserver)));
4176: if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4177: return (undef,undef);
4178: }
4179: return ($update,$comment);
4180: }
4181:
4182: sub auto_photoupdate {
4183: my ($affiliatesref,$dom,$cnum,$photo) = @_;
4184: my $homeserver = &homeserver($cnum,$dom);
4185: my $host=$hostname{$homeserver};
4186: my $cmd = '';
4187: my $maxtries = 1;
4188: foreach (keys %{$affiliatesref}) {
4189: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
4190: }
4191: $cmd =~ s/%%$//;
4192: $cmd = &escape($cmd);
4193: my $query = 'institutionalphotos';
4194: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
4195: unless ($queryid=~/^\Q$host\E\_/) {
4196: &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
4197: return 'error: '.$queryid;
4198: }
4199: my $reply = &get_query_reply($queryid);
4200: my $tries = 1;
4201: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4202: $reply = &get_query_reply($queryid);
4203: $tries ++;
4204: }
4205: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4206: &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4207: } else {
4208: my @responses = split(/:/,$reply);
4209: my $outcome = shift(@responses);
4210: foreach my $item (@responses) {
4211: my ($key,$value) = split(/=/,$item);
4212: $$photo{$key} = $value;
4213: }
4214: return $outcome;
4215: }
4216: return 'error';
4217: }
4218:
4219: sub auto_instcode_format {
4220: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,
4221: $cat_order) = @_;
4222: my $courses = '';
4223: my @homeservers;
4224: if ($caller eq 'global') {
4225: foreach my $tryserver (keys(%libserv)) {
4226: if ($hostdom{$tryserver} eq $codedom) {
4227: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4228: push(@homeservers,$tryserver);
4229: }
4230: }
4231: }
4232: } else {
4233: push(@homeservers,&homeserver($caller,$codedom));
4234: }
4235: foreach my $code (keys(%{$instcodes})) {
4236: $courses .= &escape($code).'='.&escape($$instcodes{$code}).'&';
4237: }
4238: chop($courses);
4239: my $ok_response = 0;
4240: my $response;
4241: while (@homeservers > 0 && $ok_response == 0) {
4242: my $server = shift(@homeservers);
4243: $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$server);
4244: if ($response !~ /(con_lost|error|no_such_host|refused)/) {
4245: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) =
4246: split/:/,$response;
4247: %{$codes} = (%{$codes},&str2hash($codes_str));
4248: push(@{$codetitles},&str2array($codetitles_str));
4249: %{$cat_titles} = (%{$cat_titles},&str2hash($cat_titles_str));
4250: %{$cat_order} = (%{$cat_order},&str2hash($cat_order_str));
4251: $ok_response = 1;
4252: }
4253: }
4254: if ($ok_response) {
4255: return 'ok';
4256: } else {
4257: return $response;
4258: }
4259: }
4260:
4261: sub auto_instcode_defaults {
4262: my ($domain,$returnhash,$code_order) = @_;
4263: my @homeservers;
4264: foreach my $tryserver (keys(%libserv)) {
4265: if ($hostdom{$tryserver} eq $domain) {
4266: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4267: push(@homeservers,$tryserver);
4268: }
4269: }
4270: }
4271: my $ok_response = 0;
4272: my $response;
4273: while (@homeservers > 0 && $ok_response == 0) {
4274: my $server = shift(@homeservers);
4275: $response=&reply('autoinstcodedefaults:'.$domain,$server);
4276: if ($response !~ /(con_lost|error|no_such_host|refused)/) {
4277: foreach my $pair (split(/\&/,$response)) {
4278: my ($name,$value)=split(/\=/,$pair);
4279: if ($name eq 'code_order') {
4280: $code_order = [split(/\&/,&unescape($value))];
4281: } else {
4282: $$returnhash{&unescape($name)}=&unescape($value);
4283: }
4284: }
4285: }
4286: $ok_response = 1;
4287: }
4288: if ($ok_response) {
4289: return 'ok';
4290: } else {
4291: return $response;
4292: }
4293: }
4294:
4295: sub auto_validate_class_sec {
4296: my ($cdom,$cnum,$owner,$inst_class) = @_;
4297: my $homeserver = &homeserver($cnum,$cdom);
4298: my $response=&reply('autovalidateclass_sec:'.$inst_class.':'.
4299: &escape($owner).':'.$cdom,$homeserver);
4300: return $response;
4301: }
4302:
4303: # ------------------------------------------------------- Course Group routines
4304:
4305: sub get_coursegroups {
4306: my ($cdom,$cnum,$group) = @_;
4307: return(&dump('coursegroups',$cdom,$cnum,$group));
4308: }
4309:
4310: sub modify_coursegroup {
4311: my ($cdom,$cnum,$groupsettings) = @_;
4312: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
4313: }
4314:
4315: sub modify_group_roles {
4316: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
4317: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
4318: my $role = 'gr/'.&escape($userprivs);
4319: my ($uname,$udom) = split(/:/,$user);
4320: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
4321: if ($result eq 'ok') {
4322: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
4323: }
4324: return $result;
4325: }
4326:
4327: sub modify_coursegroup_membership {
4328: my ($cdom,$cnum,$membership) = @_;
4329: my $result = &put('groupmembership',$membership,$cdom,$cnum);
4330: return $result;
4331: }
4332:
4333: sub get_active_groups {
4334: my ($udom,$uname,$cdom,$cnum) = @_;
4335: my $now = time;
4336: my %groups = ();
4337: foreach my $key (keys(%env)) {
4338: if ($key =~ m-user\.role\.gr\./([^/]+)/([^/]+)/(\w+)$-) {
4339: my ($start,$end) = split(/\./,$env{$key});
4340: if (($end!=0) && ($end<$now)) { next; }
4341: if (($start!=0) && ($start>$now)) { next; }
4342: if ($1 eq $cdom && $2 eq $cnum) {
4343: $groups{$3} = $env{$key} ;
4344: }
4345: }
4346: }
4347: return %groups;
4348: }
4349:
4350: sub get_group_membership {
4351: my ($cdom,$cnum,$group) = @_;
4352: return(&dump('groupmembership',$cdom,$cnum,$group));
4353: }
4354:
4355: sub get_users_groups {
4356: my ($udom,$uname,$courseid) = @_;
4357: my @usersgroups;
4358: my $cachetime=1800;
4359: $courseid=~s/\_/\//g;
4360: $courseid=~s/^(\w)/\/$1/;
4361:
4362: my $hashid="$udom:$uname:$courseid";
4363: my ($grouplist,$cached)=&is_cached_new('getgroups',$hashid);
4364: if (defined($cached)) {
4365: @usersgroups = split(/:/,$grouplist);
4366: } else {
4367: $grouplist = '';
4368: my %roleshash = &dump('roles',$udom,$uname,$courseid);
4369: my ($tmp) = keys(%roleshash);
4370: if ($tmp=~/^error:/) {
4371: &logthis('Error retrieving roles: '.$tmp.' for '.$uname.':'.$udom);
4372: } else {
4373: my $access_end = $env{'course.'.$courseid.
4374: '.default_enrollment_end_date'};
4375: my $now = time;
4376: foreach my $key (keys(%roleshash)) {
4377: if ($key =~ /^\Q$courseid\E\/(\w+)\_gr$/) {
4378: my $group = $1;
4379: if ($roleshash{$key} =~ /_(\d+)_(\d+)$/) {
4380: my $start = $2;
4381: my $end = $1;
4382: if ($start == -1) { next; } # deleted from group
4383: if (($start!=0) && ($start>$now)) { next; }
4384: if (($end!=0) && ($end<$now)) {
4385: if ($access_end && $access_end < $now) {
4386: if ($access_end - $end < 86400) {
4387: push(@usersgroups,$group);
4388: }
4389: }
4390: next;
4391: }
4392: push(@usersgroups,$group);
4393: }
4394: }
4395: }
4396: @usersgroups = &sort_course_groups($courseid,@usersgroups);
4397: $grouplist = join(':',@usersgroups);
4398: &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
4399: }
4400: }
4401: return @usersgroups;
4402: }
4403:
4404: sub devalidate_getgroups_cache {
4405: my ($udom,$uname,$cdom,$cnum)=@_;
4406: my $courseid = $cdom.'_'.$cnum;
4407: $courseid=~s/\_/\//g;
4408: $courseid=~s/^(\w)/\/$1/;
4409: my $hashid="$udom:$uname:$courseid";
4410: &devalidate_cache_new('getgroups',$hashid);
4411: }
4412:
4413: # ------------------------------------------------------------------ Plain Text
4414:
4415: sub plaintext {
4416: my ($short,$type,$cid) = @_;
4417: if ($short =~ /^cr/) {
4418: return (split('/',$short))[-1];
4419: }
4420: if (!defined($cid)) {
4421: $cid = $env{'request.course.id'};
4422: }
4423: if (defined($cid) && defined($env{'course.'.$cid.'.'.$short.'.plaintext'})) {
4424: return &Apache::lonlocal::mt($env{'course.'.$cid.'.'.$short.
4425: '.plaintext'});
4426: }
4427: my %rolenames = (
4428: Course => 'std',
4429: Group => 'alt1',
4430: );
4431: if (defined($type) &&
4432: defined($rolenames{$type}) &&
4433: defined($prp{$short}{$rolenames{$type}})) {
4434: return &Apache::lonlocal::mt($prp{$short}{$rolenames{$type}});
4435: } else {
4436: return &Apache::lonlocal::mt($prp{$short}{'std'});
4437: }
4438: }
4439:
4440: # ----------------------------------------------------------------- Assign Role
4441:
4442: sub assignrole {
4443: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
4444: my $mrole;
4445: if ($role =~ /^cr\//) {
4446: my $cwosec=$url;
4447: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4448: unless (&allowed('ccr',$cwosec)) {
4449: &logthis('Refused custom assignrole: '.
4450: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4451: $env{'user.name'}.' at '.$env{'user.domain'});
4452: return 'refused';
4453: }
4454: $mrole='cr';
4455: } elsif ($role =~ /^gr\//) {
4456: my $cwogrp=$url;
4457: $cwogrp=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4458: unless (&allowed('mdg',$cwogrp)) {
4459: &logthis('Refused group assignrole: '.
4460: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4461: $env{'user.name'}.' at '.$env{'user.domain'});
4462: return 'refused';
4463: }
4464: $mrole='gr';
4465: } else {
4466: my $cwosec=$url;
4467: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4468: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
4469: &logthis('Refused assignrole: '.
4470: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4471: $env{'user.name'}.' at '.$env{'user.domain'});
4472: return 'refused';
4473: }
4474: $mrole=$role;
4475: }
4476: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4477: "$udom:$uname:$url".'_'."$mrole=$role";
4478: if ($end) { $command.='_'.$end; }
4479: if ($start) {
4480: if ($end) {
4481: $command.='_'.$start;
4482: } else {
4483: $command.='_0_'.$start;
4484: }
4485: }
4486: my $origstart = $start;
4487: my $origend = $end;
4488: # actually delete
4489: if ($deleteflag) {
4490: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
4491: # modify command to delete the role
4492: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
4493: "$udom:$uname:$url".'_'."$mrole";
4494: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
4495: # set start and finish to negative values for userrolelog
4496: $start=-1;
4497: $end=-1;
4498: }
4499: }
4500: # send command
4501: my $answer=&reply($command,&homeserver($uname,$udom));
4502: # log new user role if status is ok
4503: if ($answer eq 'ok') {
4504: &userrolelog($role,$uname,$udom,$url,$start,$end);
4505: # for course roles, perform group memberships changes triggered by role change.
4506: unless ($role =~ /^gr/) {
4507: &Apache::longroup::group_changes($udom,$uname,$url,$role,$origend,
4508: $origstart);
4509: }
4510: }
4511: return $answer;
4512: }
4513:
4514: # -------------------------------------------------- Modify user authentication
4515: # Overrides without validation
4516:
4517: sub modifyuserauth {
4518: my ($udom,$uname,$umode,$upass)=@_;
4519: my $uhome=&homeserver($uname,$udom);
4520: unless (&allowed('mau',$udom)) { return 'refused'; }
4521: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
4522: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4523: ' in domain '.$env{'request.role.domain'});
4524: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
4525: &escape($upass),$uhome);
4526: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
4527: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
4528: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4529: &log($udom,,$uname,$uhome,
4530: 'Authentication changed by '.$env{'user.domain'}.', '.
4531: $env{'user.name'}.', '.$umode.
4532: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4533: unless ($reply eq 'ok') {
4534: &logthis('Authentication mode error: '.$reply);
4535: return 'error: '.$reply;
4536: }
4537: return 'ok';
4538: }
4539:
4540: # --------------------------------------------------------------- Modify a user
4541:
4542: sub modifyuser {
4543: my ($udom, $uname, $uid,
4544: $umode, $upass, $first,
4545: $middle, $last, $gene,
4546: $forceid, $desiredhome, $email)=@_;
4547: $udom=~s/\W//g;
4548: $uname=~s/\W//g;
4549: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
4550: $umode.', '.$first.', '.$middle.', '.
4551: $last.', '.$gene.'(forceid: '.$forceid.')'.
4552: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
4553: ' desiredhome not specified').
4554: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4555: ' in domain '.$env{'request.role.domain'});
4556: my $uhome=&homeserver($uname,$udom,'true');
4557: # ----------------------------------------------------------------- Create User
4558: if (($uhome eq 'no_host') &&
4559: (($umode && $upass) || ($umode eq 'localauth'))) {
4560: my $unhome='';
4561: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
4562: $unhome = $desiredhome;
4563: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
4564: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
4565: } else { # load balancing routine for determining $unhome
4566: my $tryserver;
4567: my $loadm=10000000;
4568: foreach $tryserver (keys %libserv) {
4569: if ($hostdom{$tryserver} eq $udom) {
4570: my $answer=reply('load',$tryserver);
4571: if (($answer=~/\d+/) && ($answer<$loadm)) {
4572: $loadm=$answer;
4573: $unhome=$tryserver;
4574: }
4575: }
4576: }
4577: }
4578: if (($unhome eq '') || ($unhome eq 'no_host')) {
4579: return 'error: unable to find a home server for '.$uname.
4580: ' in domain '.$udom;
4581: }
4582: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
4583: &escape($upass),$unhome);
4584: unless ($reply eq 'ok') {
4585: return 'error: '.$reply;
4586: }
4587: $uhome=&homeserver($uname,$udom,'true');
4588: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
4589: return 'error: unable verify users home machine.';
4590: }
4591: } # End of creation of new user
4592: # ---------------------------------------------------------------------- Add ID
4593: if ($uid) {
4594: $uid=~tr/A-Z/a-z/;
4595: my %uidhash=&idrget($udom,$uname);
4596: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
4597: && (!$forceid)) {
4598: unless ($uid eq $uidhash{$uname}) {
4599: return 'error: user id "'.$uid.'" does not match '.
4600: 'current user id "'.$uidhash{$uname}.'".';
4601: }
4602: } else {
4603: &idput($udom,($uname => $uid));
4604: }
4605: }
4606: # -------------------------------------------------------------- Add names, etc
4607: my @tmp=&get('environment',
4608: ['firstname','middlename','lastname','generation'],
4609: $udom,$uname);
4610: my %names;
4611: if ($tmp[0] =~ m/^error:.*/) {
4612: %names=();
4613: } else {
4614: %names = @tmp;
4615: }
4616: #
4617: # Make sure to not trash student environment if instructor does not bother
4618: # to supply name and email information
4619: #
4620: if ($first) { $names{'firstname'} = $first; }
4621: if (defined($middle)) { $names{'middlename'} = $middle; }
4622: if ($last) { $names{'lastname'} = $last; }
4623: if (defined($gene)) { $names{'generation'} = $gene; }
4624: if ($email) {
4625: $email=~s/[^\w\@\.\-\,]//gs;
4626: if ($email=~/\@/) { $names{'notification'} = $email;
4627: $names{'critnotification'} = $email;
4628: $names{'permanentemail'} = $email; }
4629: }
4630: my $reply = &put('environment', \%names, $udom,$uname);
4631: if ($reply ne 'ok') { return 'error: '.$reply; }
4632: &devalidate_cache_new('namescache',$uname.':'.$udom);
4633: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
4634: $umode.', '.$first.', '.$middle.', '.
4635: $last.', '.$gene.' by '.
4636: $env{'user.name'}.' at '.$env{'user.domain'});
4637: return 'ok';
4638: }
4639:
4640: # -------------------------------------------------------------- Modify student
4641:
4642: sub modifystudent {
4643: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
4644: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
4645: if (!$cid) {
4646: unless ($cid=$env{'request.course.id'}) {
4647: return 'not_in_class';
4648: }
4649: }
4650: # --------------------------------------------------------------- Make the user
4651: my $reply=&modifyuser
4652: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
4653: $desiredhome,$email);
4654: unless ($reply eq 'ok') { return $reply; }
4655: # This will cause &modify_student_enrollment to get the uid from the
4656: # students environment
4657: $uid = undef if (!$forceid);
4658: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
4659: $gene,$usec,$end,$start,$type,$locktype,$cid);
4660: return $reply;
4661: }
4662:
4663: sub modify_student_enrollment {
4664: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
4665: my ($cdom,$cnum,$chome);
4666: if (!$cid) {
4667: unless ($cid=$env{'request.course.id'}) {
4668: return 'not_in_class';
4669: }
4670: $cdom=$env{'course.'.$cid.'.domain'};
4671: $cnum=$env{'course.'.$cid.'.num'};
4672: } else {
4673: ($cdom,$cnum)=split(/_/,$cid);
4674: }
4675: $chome=$env{'course.'.$cid.'.home'};
4676: if (!$chome) {
4677: $chome=&homeserver($cnum,$cdom);
4678: }
4679: if (!$chome) { return 'unknown_course'; }
4680: # Make sure the user exists
4681: my $uhome=&homeserver($uname,$udom);
4682: if (($uhome eq '') || ($uhome eq 'no_host')) {
4683: return 'error: no such user';
4684: }
4685: # Get student data if we were not given enough information
4686: if (!defined($first) || $first eq '' ||
4687: !defined($last) || $last eq '' ||
4688: !defined($uid) || $uid eq '' ||
4689: !defined($middle) || $middle eq '' ||
4690: !defined($gene) || $gene eq '') {
4691: # They did not supply us with enough data to enroll the student, so
4692: # we need to pick up more information.
4693: my %tmp = &get('environment',
4694: ['firstname','middlename','lastname', 'generation','id']
4695: ,$udom,$uname);
4696:
4697: #foreach (keys(%tmp)) {
4698: # &logthis("key $_ = ".$tmp{$_});
4699: #}
4700: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
4701: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
4702: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
4703: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
4704: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
4705: }
4706: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
4707: my $reply=cput('classlist',
4708: {"$uname:$udom" =>
4709: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
4710: $cdom,$cnum);
4711: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
4712: return 'error: '.$reply;
4713: } else {
4714: &devalidate_getsection_cache($udom,$uname,$cid);
4715: }
4716: # Add student role to user
4717: my $uurl='/'.$cid;
4718: $uurl=~s/\_/\//g;
4719: if ($usec) {
4720: $uurl.='/'.$usec;
4721: }
4722: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
4723: }
4724:
4725: sub format_name {
4726: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
4727: my $name;
4728: if ($first ne 'lastname') {
4729: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
4730: } else {
4731: if ($lastname=~/\S/) {
4732: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
4733: $name=~s/\s+,/,/;
4734: } else {
4735: $name.= $firstname.' '.$middlename.' '.$generation;
4736: }
4737: }
4738: $name=~s/^\s+//;
4739: $name=~s/\s+$//;
4740: $name=~s/\s+/ /g;
4741: return $name;
4742: }
4743:
4744: # ------------------------------------------------- Write to course preferences
4745:
4746: sub writecoursepref {
4747: my ($courseid,%prefs)=@_;
4748: $courseid=~s/^\///;
4749: $courseid=~s/\_/\//g;
4750: my ($cdomain,$cnum)=split(/\//,$courseid);
4751: my $chome=homeserver($cnum,$cdomain);
4752: if (($chome eq '') || ($chome eq 'no_host')) {
4753: return 'error: no such course';
4754: }
4755: my $cstring='';
4756: foreach (keys %prefs) {
4757: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
4758: }
4759: $cstring=~s/\&$//;
4760: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
4761: }
4762:
4763: # ---------------------------------------------------------- Make/modify course
4764:
4765: sub createcourse {
4766: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,
4767: $course_owner,$crstype)=@_;
4768: $url=&declutter($url);
4769: my $cid='';
4770: unless (&allowed('ccc',$udom)) {
4771: return 'refused';
4772: }
4773: # ------------------------------------------------------------------- Create ID
4774: my $uname=int(1+rand(9)).
4775: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
4776: substr($$.time,0,5).unpack("H8",pack("I32",time)).
4777: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4778: # ----------------------------------------------- Make sure that does not exist
4779: my $uhome=&homeserver($uname,$udom,'true');
4780: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4781: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
4782: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4783: $uhome=&homeserver($uname,$udom,'true');
4784: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4785: return 'error: unable to generate unique course-ID';
4786: }
4787: }
4788: # ------------------------------------------------ Check supplied server name
4789: $course_server = $env{'user.homeserver'} if (! defined($course_server));
4790: if (! exists($libserv{$course_server})) {
4791: return 'error:bad server name '.$course_server;
4792: }
4793: # ------------------------------------------------------------- Make the course
4794: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
4795: $course_server);
4796: unless ($reply eq 'ok') { return 'error: '.$reply; }
4797: $uhome=&homeserver($uname,$udom,'true');
4798: if (($uhome eq '') || ($uhome eq 'no_host')) {
4799: return 'error: no such course';
4800: }
4801: # ----------------------------------------------------------------- Course made
4802: # log existence
4803: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
4804: ':'.&escape($inst_code).':'.&escape($course_owner).':'.
4805: &escape($crstype),$uhome);
4806: &flushcourselogs();
4807: # set toplevel url
4808: my $topurl=$url;
4809: unless ($nonstandard) {
4810: # ------------------------------------------ For standard courses, make top url
4811: my $mapurl=&clutter($url);
4812: if ($mapurl eq '/res/') { $mapurl=''; }
4813: $env{'form.initmap'}=(<<ENDINITMAP);
4814: <map>
4815: <resource id="1" type="start"></resource>
4816: <resource id="2" src="$mapurl"></resource>
4817: <resource id="3" type="finish"></resource>
4818: <link index="1" from="1" to="2"></link>
4819: <link index="2" from="2" to="3"></link>
4820: </map>
4821: ENDINITMAP
4822: $topurl=&declutter(
4823: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
4824: );
4825: }
4826: # ----------------------------------------------------------- Write preferences
4827: &writecoursepref($udom.'_'.$uname,
4828: ('description' => $description,
4829: 'url' => $topurl));
4830: return '/'.$udom.'/'.$uname;
4831: }
4832:
4833: # ---------------------------------------------------------- Assign Custom Role
4834:
4835: sub assigncustomrole {
4836: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
4837: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
4838: $end,$start,$deleteflag);
4839: }
4840:
4841: # ----------------------------------------------------------------- Revoke Role
4842:
4843: sub revokerole {
4844: my ($udom,$uname,$url,$role,$deleteflag)=@_;
4845: my $now=time;
4846: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
4847: }
4848:
4849: # ---------------------------------------------------------- Revoke Custom Role
4850:
4851: sub revokecustomrole {
4852: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
4853: my $now=time;
4854: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
4855: $deleteflag);
4856: }
4857:
4858: # ------------------------------------------------------------ Disk usage
4859: sub diskusage {
4860: my ($udom,$uname,$directoryRoot)=@_;
4861: $directoryRoot =~ s/\/$//;
4862: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
4863: return $listing;
4864: }
4865:
4866: sub is_locked {
4867: my ($file_name, $domain, $user) = @_;
4868: my @check;
4869: my $is_locked;
4870: push @check, $file_name;
4871: my %locked = &get('file_permissions',\@check,
4872: $env{'user.domain'},$env{'user.name'});
4873: my ($tmp)=keys(%locked);
4874: if ($tmp=~/^error:/) { undef(%locked); }
4875:
4876: if (ref($locked{$file_name}) eq 'ARRAY') {
4877: $is_locked = 'false';
4878: foreach my $entry (@{$locked{$file_name}}) {
4879: if (ref($entry) eq 'ARRAY') {
4880: $is_locked = 'true';
4881: last;
4882: }
4883: }
4884: } else {
4885: $is_locked = 'false';
4886: }
4887: }
4888:
4889: sub declutter_portfile {
4890: my ($file) = @_;
4891: &logthis("got $file");
4892: $file =~ s-^(/portfolio/|portfolio/)-/-;
4893: &logthis("ret $file");
4894: return $file;
4895: }
4896:
4897: # ------------------------------------------------------------- Mark as Read Only
4898:
4899: sub mark_as_readonly {
4900: my ($domain,$user,$files,$what) = @_;
4901: my %current_permissions = &dump('file_permissions',$domain,$user);
4902: my ($tmp)=keys(%current_permissions);
4903: if ($tmp=~/^error:/) { undef(%current_permissions); }
4904: foreach my $file (@{$files}) {
4905: $file = &declutter_portfile($file);
4906: push(@{$current_permissions{$file}},$what);
4907: }
4908: &put('file_permissions',\%current_permissions,$domain,$user);
4909: return;
4910: }
4911:
4912: # ------------------------------------------------------------Save Selected Files
4913:
4914: sub save_selected_files {
4915: my ($user, $path, @files) = @_;
4916: my $filename = $user."savedfiles";
4917: my @other_files = &files_not_in_path($user, $path);
4918: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4919: foreach my $file (@files) {
4920: print (OUT $env{'form.currentpath'}.$file."\n");
4921: }
4922: foreach my $file (@other_files) {
4923: print (OUT $file."\n");
4924: }
4925: close (OUT);
4926: return 'ok';
4927: }
4928:
4929: sub clear_selected_files {
4930: my ($user) = @_;
4931: my $filename = $user."savedfiles";
4932: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4933: print (OUT undef);
4934: close (OUT);
4935: return ("ok");
4936: }
4937:
4938: sub files_in_path {
4939: my ($user, $path) = @_;
4940: my $filename = $user."savedfiles";
4941: my %return_files;
4942: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4943: while (my $line_in = <IN>) {
4944: chomp ($line_in);
4945: my @paths_and_file = split (m!/!, $line_in);
4946: my $file_part = pop (@paths_and_file);
4947: my $path_part = join ('/', @paths_and_file);
4948: $path_part.='/';
4949: my $path_and_file = $path_part.$file_part;
4950: if ($path_part eq $path) {
4951: $return_files{$file_part}= 'selected';
4952: }
4953: }
4954: close (IN);
4955: return (\%return_files);
4956: }
4957:
4958: # called in portfolio select mode, to show files selected NOT in current directory
4959: sub files_not_in_path {
4960: my ($user, $path) = @_;
4961: my $filename = $user."savedfiles";
4962: my @return_files;
4963: my $path_part;
4964: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4965: while (<IN>) {
4966: #ok, I know it's clunky, but I want it to work
4967: my @paths_and_file = split m!/!, $_;
4968: my $file_part = pop (@paths_and_file);
4969: chomp ($file_part);
4970: my $path_part = join ('/', @paths_and_file);
4971: $path_part .= '/';
4972: my $path_and_file = $path_part.$file_part;
4973: if ($path_part ne $path) {
4974: push (@return_files, ($path_and_file));
4975: }
4976: }
4977: close (OUT);
4978: return (@return_files);
4979: }
4980:
4981: #----------------------------------------------Get portfolio file permissions
4982:
4983: sub get_portfile_permissions {
4984: my ($domain,$user) = @_;
4985: my %current_permissions = &dump('file_permissions',$domain,$user);
4986: my ($tmp)=keys(%current_permissions);
4987: if ($tmp=~/^error:/) { undef(%current_permissions); }
4988: return \%current_permissions;
4989: }
4990:
4991: #---------------------------------------------Get portfolio file access controls
4992:
4993: sub get_access_controls {
4994: my ($current_permissions,$group,$file) = @_;
4995: my %access;
4996: my $real_file = $file;
4997: $file =~ s/\.meta$//;
4998: if (defined($file)) {
4999: if (ref($$current_permissions{$file."\0".'accesscontrol'}) eq 'HASH') {
5000: foreach my $control (keys(%{$$current_permissions{$file."\0".'accesscontrol'}})) {
5001: $access{$real_file}{$control} = $$current_permissions{$file."\0".$control};
5002: }
5003: }
5004: } else {
5005: foreach my $key (keys(%{$current_permissions})) {
5006: if ($key =~ /\0accesscontrol$/) {
5007: if (defined($group)) {
5008: if ($key !~ m-^\Q$group\E/-) {
5009: next;
5010: }
5011: }
5012: my ($fullpath) = split(/\0/,$key);
5013: if (ref($$current_permissions{$key}) eq 'HASH') {
5014: foreach my $control (keys(%{$$current_permissions{$key}})) {
5015: $access{$fullpath}{$control}=$$current_permissions{$fullpath."\0".$control};
5016: }
5017: }
5018: }
5019: }
5020: }
5021: return %access;
5022: }
5023:
5024: sub modify_access_controls {
5025: my ($file_name,$changes,$domain,$user)=@_;
5026: my ($outcome,$deloutcome);
5027: my %store_permissions;
5028: my %new_values;
5029: my %new_control;
5030: my %translation;
5031: my @deletions = ();
5032: my $now = time;
5033: if (exists($$changes{'activate'})) {
5034: if (ref($$changes{'activate'}) eq 'HASH') {
5035: my @newitems = sort(keys(%{$$changes{'activate'}}));
5036: my $numnew = scalar(@newitems);
5037: for (my $i=0; $i<$numnew; $i++) {
5038: my $newkey = $newitems[$i];
5039: my $newid = &Apache::loncommon::get_cgi_id();
5040: $newkey =~ s/^(\d+)/$newid/;
5041: $translation{$1} = $newid;
5042: $new_values{$file_name."\0".$newkey} =
5043: $$changes{'activate'}{$newitems[$i]};
5044: $new_control{$newkey} = $now;
5045: }
5046: }
5047: }
5048: my %todelete;
5049: my %changed_items;
5050: foreach my $action ('delete','update') {
5051: if (exists($$changes{$action})) {
5052: if (ref($$changes{$action}) eq 'HASH') {
5053: foreach my $key (keys(%{$$changes{$action}})) {
5054: my ($itemnum) = ($key =~ /^([^:]+):/);
5055: if ($action eq 'delete') {
5056: $todelete{$itemnum} = 1;
5057: } else {
5058: $changed_items{$itemnum} = $key;
5059: }
5060: }
5061: }
5062: }
5063: }
5064: # get lock on access controls for file.
5065: my $lockhash = {
5066: $file_name."\0".'locked_access_records' => $env{'user.name'}.
5067: ':'.$env{'user.domain'},
5068: };
5069: my $tries = 0;
5070: my $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5071:
5072: while (($gotlock ne 'ok') && $tries <3) {
5073: $tries ++;
5074: sleep 1;
5075: $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5076: }
5077: if ($gotlock eq 'ok') {
5078: my %curr_permissions = &dump('file_permissions',$domain,$user,$file_name);
5079: my ($tmp)=keys(%curr_permissions);
5080: if ($tmp=~/^error:/) { undef(%curr_permissions); }
5081: if (exists($curr_permissions{$file_name."\0".'accesscontrol'})) {
5082: my $curr_controls = $curr_permissions{$file_name."\0".'accesscontrol'};
5083: if (ref($curr_controls) eq 'HASH') {
5084: foreach my $control_item (keys(%{$curr_controls})) {
5085: my ($itemnum) = ($control_item =~ /^([^:]+):/);
5086: if (defined($todelete{$itemnum})) {
5087: push(@deletions,$file_name."\0".$control_item);
5088: } else {
5089: if (defined($changed_items{$itemnum})) {
5090: $new_control{$changed_items{$itemnum}} = $now;
5091: push(@deletions,$file_name."\0".$control_item);
5092: $new_values{$file_name."\0".$changed_items{$itemnum}} = $$changes{'update'}{$changed_items{$itemnum}};
5093: } else {
5094: $new_control{$control_item} = $$curr_controls{$control_item};
5095: }
5096: }
5097: }
5098: }
5099: }
5100: $deloutcome = &del('file_permissions',\@deletions,$domain,$user);
5101: $new_values{$file_name."\0".'accesscontrol'} = \%new_control;
5102: $outcome = &put('file_permissions',\%new_values,$domain,$user);
5103: # remove lock
5104: my @del_lock = ($file_name."\0".'locked_access_records');
5105: my $dellockoutcome = &del('file_permissions',\@del_lock,$domain,$user);
5106: } else {
5107: $outcome = "error: could not obtain lockfile\n";
5108: }
5109: return ($outcome,$deloutcome,\%new_values,\%translation);
5110: }
5111:
5112: #------------------------------------------------------Get Marked as Read Only
5113:
5114: sub get_marked_as_readonly {
5115: my ($domain,$user,$what,$group) = @_;
5116: my $current_permissions = &get_portfile_permissions($domain,$user);
5117: my @readonly_files;
5118: my $cmp1=$what;
5119: if (ref($what)) { $cmp1=join('',@{$what}) };
5120: while (my ($file_name,$value) = each(%{$current_permissions})) {
5121: if (defined($group)) {
5122: if ($file_name !~ m-^\Q$group\E/-) {
5123: next;
5124: }
5125: }
5126: if (ref($value) eq "ARRAY"){
5127: foreach my $stored_what (@{$value}) {
5128: my $cmp2=$stored_what;
5129: if (ref($stored_what) eq 'ARRAY') {
5130: $cmp2=join('',@{$stored_what});
5131: }
5132: if ($cmp1 eq $cmp2) {
5133: push(@readonly_files, $file_name);
5134: last;
5135: } elsif (!defined($what)) {
5136: push(@readonly_files, $file_name);
5137: last;
5138: }
5139: }
5140: }
5141: }
5142: return @readonly_files;
5143: }
5144: #-----------------------------------------------------------Get Marked as Read Only Hash
5145:
5146: sub get_marked_as_readonly_hash {
5147: my ($current_permissions,$group,$what) = @_;
5148: my %readonly_files;
5149: while (my ($file_name,$value) = each(%{$current_permissions})) {
5150: if (defined($group)) {
5151: if ($file_name !~ m-^\Q$group\E/-) {
5152: next;
5153: }
5154: }
5155: if (ref($value) eq "ARRAY"){
5156: foreach my $stored_what (@{$value}) {
5157: if (ref($stored_what) eq 'ARRAY') {
5158: foreach my $lock_descriptor(@{$stored_what}) {
5159: if ($lock_descriptor eq 'graded') {
5160: $readonly_files{$file_name} = 'graded';
5161: } elsif ($lock_descriptor eq 'handback') {
5162: $readonly_files{$file_name} = 'handback';
5163: } else {
5164: if (!exists($readonly_files{$file_name})) {
5165: $readonly_files{$file_name} = 'locked';
5166: }
5167: }
5168: }
5169: }
5170: }
5171: }
5172: }
5173: return %readonly_files;
5174: }
5175: # ------------------------------------------------------------ Unmark as Read Only
5176:
5177: sub unmark_as_readonly {
5178: # unmarks $file_name (if $file_name is defined), or all files locked by $what
5179: # for portfolio submissions, $what contains [$symb,$crsid]
5180: my ($domain,$user,$what,$file_name,$group) = @_;
5181: $file_name = &declutter_portfile($file_name);
5182: my $symb_crs = $what;
5183: if (ref($what)) { $symb_crs=join('',@$what); }
5184: my %current_permissions = &dump('file_permissions',$domain,$user,$group);
5185: my ($tmp)=keys(%current_permissions);
5186: if ($tmp=~/^error:/) { undef(%current_permissions); }
5187: my @readonly_files = &get_marked_as_readonly($domain,$user,$what,$group);
5188: foreach my $file (@readonly_files) {
5189: my $clean_file = &declutter_portfile($file);
5190: if (defined($file_name) && ($file_name ne $clean_file)) { next; }
5191: my $current_locks = $current_permissions{$file};
5192: my @new_locks;
5193: my @del_keys;
5194: if (ref($current_locks) eq "ARRAY"){
5195: foreach my $locker (@{$current_locks}) {
5196: my $compare=$locker;
5197: if (ref($locker) eq 'ARRAY') {
5198: $compare=join('',@{$locker});
5199: if ($compare ne $symb_crs) {
5200: push(@new_locks, $locker);
5201: }
5202: }
5203: }
5204: if (scalar(@new_locks) > 0) {
5205: $current_permissions{$file} = \@new_locks;
5206: } else {
5207: push(@del_keys, $file);
5208: &del('file_permissions',\@del_keys, $domain, $user);
5209: delete($current_permissions{$file});
5210: }
5211: }
5212: }
5213: &put('file_permissions',\%current_permissions,$domain,$user);
5214: return;
5215: }
5216:
5217: # ------------------------------------------------------------ Directory lister
5218:
5219: sub dirlist {
5220: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
5221:
5222: $uri=~s/^\///;
5223: $uri=~s/\/$//;
5224: my ($udom, $uname);
5225: (undef,$udom,$uname)=split(/\//,$uri);
5226: if(defined($userdomain)) {
5227: $udom = $userdomain;
5228: }
5229: if(defined($username)) {
5230: $uname = $username;
5231: }
5232:
5233: my $dirRoot = $perlvar{'lonDocRoot'};
5234: if(defined($alternateDirectoryRoot)) {
5235: $dirRoot = $alternateDirectoryRoot;
5236: $dirRoot =~ s/\/$//;
5237: }
5238:
5239: if($udom) {
5240: if($uname) {
5241: my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
5242: homeserver($uname,$udom));
5243: my @listing_results;
5244: if ($listing eq 'unknown_cmd') {
5245: $listing=reply('ls:'.$dirRoot.'/'.$uri,
5246: homeserver($uname,$udom));
5247: @listing_results = split(/:/,$listing);
5248: } else {
5249: @listing_results = map { &unescape($_); } split(/:/,$listing);
5250: }
5251: return @listing_results;
5252: } elsif(!defined($alternateDirectoryRoot)) {
5253: my $tryserver;
5254: my %allusers=();
5255: foreach $tryserver (keys %libserv) {
5256: if($hostdom{$tryserver} eq $udom) {
5257: my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
5258: $udom, $tryserver);
5259: my @listing_results;
5260: if ($listing eq 'unknown_cmd') {
5261: $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
5262: $udom, $tryserver);
5263: @listing_results = split(/:/,$listing);
5264: } else {
5265: @listing_results =
5266: map { &unescape($_); } split(/:/,$listing);
5267: }
5268: if ($listing_results[0] ne 'no_such_dir' &&
5269: $listing_results[0] ne 'empty' &&
5270: $listing_results[0] ne 'con_lost') {
5271: foreach (@listing_results) {
5272: my ($entry,@stat)=split(/&/,$_);
5273: $allusers{$entry}=1;
5274: }
5275: }
5276: }
5277: }
5278: my $alluserstr='';
5279: foreach (sort keys %allusers) {
5280: $alluserstr.=$_.'&user:';
5281: }
5282: $alluserstr=~s/:$//;
5283: return split(/:/,$alluserstr);
5284: } else {
5285: my @emptyResults = ();
5286: push(@emptyResults, 'missing user name');
5287: return split(':',@emptyResults);
5288: }
5289: } elsif(!defined($alternateDirectoryRoot)) {
5290: my $tryserver;
5291: my %alldom=();
5292: foreach $tryserver (keys %libserv) {
5293: $alldom{$hostdom{$tryserver}}=1;
5294: }
5295: my $alldomstr='';
5296: foreach (sort keys %alldom) {
5297: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
5298: }
5299: $alldomstr=~s/:$//;
5300: return split(/:/,$alldomstr);
5301: } else {
5302: my @emptyResults = ();
5303: push(@emptyResults, 'missing domain');
5304: return split(':',@emptyResults);
5305: }
5306: }
5307:
5308: # --------------------------------------------- GetFileTimestamp
5309: # This function utilizes dirlist and returns the date stamp for
5310: # when it was last modified. It will also return an error of -1
5311: # if an error occurs
5312:
5313: ##
5314: ## FIXME: This subroutine assumes its caller knows something about the
5315: ## directory structure of the home server for the student ($root).
5316: ## Not a good assumption to make. Since this is for looking up files
5317: ## in user directories, the full path should be constructed by lond, not
5318: ## whatever machine we request data from.
5319: ##
5320: sub GetFileTimestamp {
5321: my ($studentDomain,$studentName,$filename,$root)=@_;
5322: $studentDomain=~s/\W//g;
5323: $studentName=~s/\W//g;
5324: my $subdir=$studentName.'__';
5325: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
5326: my $proname="$studentDomain/$subdir/$studentName";
5327: $proname .= '/'.$filename;
5328: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
5329: $studentName, $root);
5330: my @stats = split('&', $fileStat);
5331: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5332: # @stats contains first the filename, then the stat output
5333: return $stats[10]; # so this is 10 instead of 9.
5334: } else {
5335: return -1;
5336: }
5337: }
5338:
5339: sub stat_file {
5340: my ($uri) = @_;
5341: $uri = &clutter_with_no_wrapper($uri);
5342:
5343: my ($udom,$uname,$file,$dir);
5344: if ($uri =~ m-^/(uploaded|editupload)/-) {
5345: ($udom,$uname,$file) =
5346: ($uri =~ m-/(?:uploaded|editupload)/?([^/]*)/?([^/]*)/?(.*)-);
5347: $file = 'userfiles/'.$file;
5348: $dir = &propath($udom,$uname);
5349: }
5350: if ($uri =~ m-^/res/-) {
5351: ($udom,$uname) =
5352: ($uri =~ m-/(?:res)/?([^/]*)/?([^/]*)/-);
5353: $file = $uri;
5354: }
5355:
5356: if (!$udom || !$uname || !$file) {
5357: # unable to handle the uri
5358: return ();
5359: }
5360:
5361: my ($result) = &dirlist($file,$udom,$uname,$dir);
5362: my @stats = split('&', $result);
5363:
5364: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5365: shift(@stats); #filename is first
5366: return @stats;
5367: }
5368: return ();
5369: }
5370:
5371: # -------------------------------------------------------- Value of a Condition
5372:
5373: # gets the value of a specific preevaluated condition
5374: # stored in the string $env{user.state.<cid>}
5375: # or looks up a condition reference in the bighash and if if hasn't
5376: # already been evaluated recurses into docondval to get the value of
5377: # the condition, then memoizing it to
5378: # $env{user.state.<cid>.<condition>}
5379: sub directcondval {
5380: my $number=shift;
5381: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
5382: &Apache::lonuserstate::evalstate();
5383: }
5384: if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
5385: return $env{'user.state.'.$env{'request.course.id'}.".$number"};
5386: } elsif ($number =~ /^_/) {
5387: my $sub_condition;
5388: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5389: &GDBM_READER(),0640)) {
5390: $sub_condition=$bighash{'conditions'.$number};
5391: untie(%bighash);
5392: }
5393: my $value = &docondval($sub_condition);
5394: &appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
5395: return $value;
5396: }
5397: if ($env{'user.state.'.$env{'request.course.id'}}) {
5398: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
5399: } else {
5400: return 2;
5401: }
5402: }
5403:
5404: # get the collection of conditions for this resource
5405: sub condval {
5406: my $condidx=shift;
5407: my $allpathcond='';
5408: foreach my $cond (split(/\|/,$condidx)) {
5409: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
5410: $allpathcond.=
5411: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
5412: }
5413: }
5414: $allpathcond=~s/\|$//;
5415: return &docondval($allpathcond);
5416: }
5417:
5418: #evaluates an expression of conditions
5419: sub docondval {
5420: my ($allpathcond) = @_;
5421: my $result=0;
5422: if ($env{'request.course.id'}
5423: && defined($allpathcond)) {
5424: my $operand='|';
5425: my @stack;
5426: foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
5427: if ($chunk eq '(') {
5428: push @stack,($operand,$result);
5429: } elsif ($chunk eq ')') {
5430: my $before=pop @stack;
5431: if (pop @stack eq '&') {
5432: $result=$result>$before?$before:$result;
5433: } else {
5434: $result=$result>$before?$result:$before;
5435: }
5436: } elsif (($chunk eq '&') || ($chunk eq '|')) {
5437: $operand=$chunk;
5438: } else {
5439: my $new=directcondval($chunk);
5440: if ($operand eq '&') {
5441: $result=$result>$new?$new:$result;
5442: } else {
5443: $result=$result>$new?$result:$new;
5444: }
5445: }
5446: }
5447: }
5448: return $result;
5449: }
5450:
5451: # ---------------------------------------------------- Devalidate courseresdata
5452:
5453: sub devalidatecourseresdata {
5454: my ($coursenum,$coursedomain)=@_;
5455: my $hashid=$coursenum.':'.$coursedomain;
5456: &devalidate_cache_new('courseres',$hashid);
5457: }
5458:
5459:
5460: # --------------------------------------------------- Course Resourcedata Query
5461:
5462: sub get_courseresdata {
5463: my ($coursenum,$coursedomain)=@_;
5464: my $coursehom=&homeserver($coursenum,$coursedomain);
5465: my $hashid=$coursenum.':'.$coursedomain;
5466: my ($result,$cached)=&is_cached_new('courseres',$hashid);
5467: my %dumpreply;
5468: unless (defined($cached)) {
5469: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
5470: $result=\%dumpreply;
5471: my ($tmp) = keys(%dumpreply);
5472: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
5473: &do_cache_new('courseres',$hashid,$result,600);
5474: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
5475: return $tmp;
5476: } elsif ($tmp =~ /^(error)/) {
5477: $result=undef;
5478: &do_cache_new('courseres',$hashid,$result,600);
5479: }
5480: }
5481: return $result;
5482: }
5483:
5484: sub devalidateuserresdata {
5485: my ($uname,$udom)=@_;
5486: my $hashid="$udom:$uname";
5487: &devalidate_cache_new('userres',$hashid);
5488: }
5489:
5490: sub get_userresdata {
5491: my ($uname,$udom)=@_;
5492: #most student don\'t have any data set, check if there is some data
5493: if (&EXT_cache_status($udom,$uname)) { return undef; }
5494:
5495: my $hashid="$udom:$uname";
5496: my ($result,$cached)=&is_cached_new('userres',$hashid);
5497: if (!defined($cached)) {
5498: my %resourcedata=&dump('resourcedata',$udom,$uname);
5499: $result=\%resourcedata;
5500: &do_cache_new('userres',$hashid,$result,600);
5501: }
5502: my ($tmp)=keys(%$result);
5503: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
5504: return $result;
5505: }
5506: #error 2 occurs when the .db doesn't exist
5507: if ($tmp!~/error: 2 /) {
5508: &logthis("<font color=\"blue\">WARNING:".
5509: " Trying to get resource data for ".
5510: $uname." at ".$udom.": ".
5511: $tmp."</font>");
5512: } elsif ($tmp=~/error: 2 /) {
5513: #&EXT_cache_set($udom,$uname);
5514: &do_cache_new('userres',$hashid,undef,600);
5515: undef($tmp); # not really an error so don't send it back
5516: }
5517: return $tmp;
5518: }
5519:
5520: sub resdata {
5521: my ($name,$domain,$type,@which)=@_;
5522: my $result;
5523: if ($type eq 'course') {
5524: $result=&get_courseresdata($name,$domain);
5525: } elsif ($type eq 'user') {
5526: $result=&get_userresdata($name,$domain);
5527: }
5528: if (!ref($result)) { return $result; }
5529: foreach my $item (@which) {
5530: if (defined($result->{$item})) {
5531: return $result->{$item};
5532: }
5533: }
5534: return undef;
5535: }
5536:
5537: #
5538: # EXT resource caching routines
5539: #
5540:
5541: sub clear_EXT_cache_status {
5542: &delenv('cache.EXT.');
5543: }
5544:
5545: sub EXT_cache_status {
5546: my ($target_domain,$target_user) = @_;
5547: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5548: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
5549: # We know already the user has no data
5550: return 1;
5551: } else {
5552: return 0;
5553: }
5554: }
5555:
5556: sub EXT_cache_set {
5557: my ($target_domain,$target_user) = @_;
5558: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5559: #&appenv($cachename => time);
5560: }
5561:
5562: # --------------------------------------------------------- Value of a Variable
5563: sub EXT {
5564:
5565: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
5566: unless ($varname) { return ''; }
5567: #get real user name/domain, courseid and symb
5568: my $courseid;
5569: my $publicuser;
5570: if ($symbparm) {
5571: $symbparm=&get_symb_from_alias($symbparm);
5572: }
5573: if (!($uname && $udom)) {
5574: (my $cursymb,$courseid,$udom,$uname,$publicuser)= &whichuser($symbparm);
5575: if (!$symbparm) { $symbparm=$cursymb; }
5576: } else {
5577: $courseid=$env{'request.course.id'};
5578: }
5579: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
5580: my $rest;
5581: if (defined($therest[0])) {
5582: $rest=join('.',@therest);
5583: } else {
5584: $rest='';
5585: }
5586:
5587: my $qualifierrest=$qualifier;
5588: if ($rest) { $qualifierrest.='.'.$rest; }
5589: my $spacequalifierrest=$space;
5590: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
5591: if ($realm eq 'user') {
5592: # --------------------------------------------------------------- user.resource
5593: if ($space eq 'resource') {
5594: if ( (defined($Apache::lonhomework::parsing_a_problem)
5595: || defined($Apache::lonhomework::parsing_a_task))
5596: &&
5597: ($symbparm eq &symbread()) ) {
5598: # if we are in the middle of processing the resource the
5599: # get the value we are planning on committing
5600: if (defined($Apache::lonhomework::results{$qualifierrest})) {
5601: return $Apache::lonhomework::results{$qualifierrest};
5602: } else {
5603: return $Apache::lonhomework::history{$qualifierrest};
5604: }
5605: } else {
5606: my %restored;
5607: if ($publicuser || $env{'request.state'} eq 'construct') {
5608: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
5609: } else {
5610: %restored=&restore($symbparm,$courseid,$udom,$uname);
5611: }
5612: return $restored{$qualifierrest};
5613: }
5614: # ----------------------------------------------------------------- user.access
5615: } elsif ($space eq 'access') {
5616: # FIXME - not supporting calls for a specific user
5617: return &allowed($qualifier,$rest);
5618: # ------------------------------------------ user.preferences, user.environment
5619: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
5620: if (($uname eq $env{'user.name'}) &&
5621: ($udom eq $env{'user.domain'})) {
5622: return $env{join('.',('environment',$qualifierrest))};
5623: } else {
5624: my %returnhash;
5625: if (!$publicuser) {
5626: %returnhash=&userenvironment($udom,$uname,
5627: $qualifierrest);
5628: }
5629: return $returnhash{$qualifierrest};
5630: }
5631: # ----------------------------------------------------------------- user.course
5632: } elsif ($space eq 'course') {
5633: # FIXME - not supporting calls for a specific user
5634: return $env{join('.',('request.course',$qualifier))};
5635: # ------------------------------------------------------------------- user.role
5636: } elsif ($space eq 'role') {
5637: # FIXME - not supporting calls for a specific user
5638: my ($role,$where)=split(/\./,$env{'request.role'});
5639: if ($qualifier eq 'value') {
5640: return $role;
5641: } elsif ($qualifier eq 'extent') {
5642: return $where;
5643: }
5644: # ----------------------------------------------------------------- user.domain
5645: } elsif ($space eq 'domain') {
5646: return $udom;
5647: # ------------------------------------------------------------------- user.name
5648: } elsif ($space eq 'name') {
5649: return $uname;
5650: # ---------------------------------------------------- Any other user namespace
5651: } else {
5652: my %reply;
5653: if (!$publicuser) {
5654: %reply=&get($space,[$qualifierrest],$udom,$uname);
5655: }
5656: return $reply{$qualifierrest};
5657: }
5658: } elsif ($realm eq 'query') {
5659: # ---------------------------------------------- pull stuff out of query string
5660: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
5661: [$spacequalifierrest]);
5662: return $env{'form.'.$spacequalifierrest};
5663: } elsif ($realm eq 'request') {
5664: # ------------------------------------------------------------- request.browser
5665: if ($space eq 'browser') {
5666: if ($qualifier eq 'textremote') {
5667: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
5668: return 1;
5669: } else {
5670: return 0;
5671: }
5672: } else {
5673: return $env{'browser.'.$qualifier};
5674: }
5675: # ------------------------------------------------------------ request.filename
5676: } else {
5677: return $env{'request.'.$spacequalifierrest};
5678: }
5679: } elsif ($realm eq 'course') {
5680: # ---------------------------------------------------------- course.description
5681: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
5682: } elsif ($realm eq 'resource') {
5683:
5684: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
5685: if (!$symbparm) { $symbparm=&symbread(); }
5686: }
5687:
5688: if ($space eq 'title') {
5689: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
5690: return &gettitle($symbparm);
5691: }
5692:
5693: if ($space eq 'map') {
5694: my ($map) = &decode_symb($symbparm);
5695: return &symbread($map);
5696: }
5697:
5698: my ($section, $group, @groups);
5699: my ($courselevelm,$courselevel);
5700: if ($symbparm && defined($courseid) &&
5701: $courseid eq $env{'request.course.id'}) {
5702:
5703: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
5704:
5705: # ----------------------------------------------------- Cascading lookup scheme
5706: my $symbp=$symbparm;
5707: my $mapp=&deversion((&decode_symb($symbp))[0]);
5708:
5709: my $symbparm=$symbp.'.'.$spacequalifierrest;
5710: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
5711:
5712: if (($env{'user.name'} eq $uname) &&
5713: ($env{'user.domain'} eq $udom)) {
5714: $section=$env{'request.course.sec'};
5715: @groups = split(/:/,$env{'request.course.groups'});
5716: @groups=&sort_course_groups($courseid,@groups);
5717: } else {
5718: if (! defined($usection)) {
5719: $section=&getsection($udom,$uname,$courseid);
5720: } else {
5721: $section = $usection;
5722: }
5723: @groups = &get_users_groups($udom,$uname,$courseid);
5724: }
5725:
5726: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
5727: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
5728: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
5729:
5730: $courselevel=$courseid.'.'.$spacequalifierrest;
5731: my $courselevelr=$courseid.'.'.$symbparm;
5732: $courselevelm=$courseid.'.'.$mapparm;
5733:
5734: # ----------------------------------------------------------- first, check user
5735:
5736: my $userreply=&resdata($uname,$udom,'user',
5737: ($courselevelr,$courselevelm,
5738: $courselevel));
5739: if (defined($userreply)) { return $userreply; }
5740:
5741: # ------------------------------------------------ second, check some of course
5742: my $coursereply;
5743: if (@groups > 0) {
5744: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
5745: $mapparm,$spacequalifierrest);
5746: if (defined($coursereply)) { return $coursereply; }
5747: }
5748:
5749: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
5750: $env{'course.'.$courseid.'.domain'},
5751: 'course',
5752: ($seclevelr,$seclevelm,$seclevel,
5753: $courselevelr));
5754: if (defined($coursereply)) { return $coursereply; }
5755:
5756: # ------------------------------------------------------ third, check map parms
5757: my %parmhash=();
5758: my $thisparm='';
5759: if (tie(%parmhash,'GDBM_File',
5760: $env{'request.course.fn'}.'_parms.db',
5761: &GDBM_READER(),0640)) {
5762: $thisparm=$parmhash{$symbparm};
5763: untie(%parmhash);
5764: }
5765: if ($thisparm) { return $thisparm; }
5766: }
5767: # ------------------------------------------ fourth, look in resource metadata
5768:
5769: $spacequalifierrest=~s/\./\_/;
5770: my $filename;
5771: if (!$symbparm) { $symbparm=&symbread(); }
5772: if ($symbparm) {
5773: $filename=(&decode_symb($symbparm))[2];
5774: } else {
5775: $filename=$env{'request.filename'};
5776: }
5777: my $metadata=&metadata($filename,$spacequalifierrest);
5778: if (defined($metadata)) { return $metadata; }
5779: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
5780: if (defined($metadata)) { return $metadata; }
5781:
5782: # ---------------------------------------------- fourth, look in rest pf course
5783: if ($symbparm && defined($courseid) &&
5784: $courseid eq $env{'request.course.id'}) {
5785: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
5786: $env{'course.'.$courseid.'.domain'},
5787: 'course',
5788: ($courselevelm,$courselevel));
5789: if (defined($coursereply)) { return $coursereply; }
5790: }
5791: # ------------------------------------------------------------------ Cascade up
5792: unless ($space eq '0') {
5793: my @parts=split(/_/,$space);
5794: my $id=pop(@parts);
5795: my $part=join('_',@parts);
5796: if ($part eq '') { $part='0'; }
5797: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
5798: $symbparm,$udom,$uname,$section,1);
5799: if (defined($partgeneral)) { return $partgeneral; }
5800: }
5801: if ($recurse) { return undef; }
5802: my $pack_def=&packages_tab_default($filename,$varname);
5803: if (defined($pack_def)) { return $pack_def; }
5804:
5805: # ---------------------------------------------------- Any other user namespace
5806: } elsif ($realm eq 'environment') {
5807: # ----------------------------------------------------------------- environment
5808: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
5809: return $env{'environment.'.$spacequalifierrest};
5810: } else {
5811: if ($uname eq 'anonymous' && $udom eq '') {
5812: return '';
5813: }
5814: my %returnhash=&userenvironment($udom,$uname,
5815: $spacequalifierrest);
5816: return $returnhash{$spacequalifierrest};
5817: }
5818: } elsif ($realm eq 'system') {
5819: # ----------------------------------------------------------------- system.time
5820: if ($space eq 'time') {
5821: return time;
5822: }
5823: } elsif ($realm eq 'server') {
5824: # ----------------------------------------------------------------- system.time
5825: if ($space eq 'name') {
5826: return $ENV{'SERVER_NAME'};
5827: }
5828: }
5829: return '';
5830: }
5831:
5832: sub check_group_parms {
5833: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
5834: my @groupitems = ();
5835: my $resultitem;
5836: my @levels = ($symbparm,$mapparm,$what);
5837: foreach my $group (@{$groups}) {
5838: foreach my $level (@levels) {
5839: my $item = $courseid.'.['.$group.'].'.$level;
5840: push(@groupitems,$item);
5841: }
5842: }
5843: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
5844: $env{'course.'.$courseid.'.domain'},
5845: 'course',@groupitems);
5846: return $coursereply;
5847: }
5848:
5849: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
5850: my ($courseid,@groups) = @_;
5851: @groups = sort(@groups);
5852: return @groups;
5853: }
5854:
5855: sub packages_tab_default {
5856: my ($uri,$varname)=@_;
5857: my (undef,$part,$name)=split(/\./,$varname);
5858:
5859: my (@extension,@specifics,$do_default);
5860: foreach my $package (split(/,/,&metadata($uri,'packages'))) {
5861: my ($pack_type,$pack_part)=split(/_/,$package,2);
5862: if ($pack_type eq 'default') {
5863: $do_default=1;
5864: } elsif ($pack_type eq 'extension') {
5865: push(@extension,[$package,$pack_type,$pack_part]);
5866: } else {
5867: push(@specifics,[$package,$pack_type,$pack_part]);
5868: }
5869: }
5870: # first look for a package that matches the requested part id
5871: foreach my $package (@specifics) {
5872: my (undef,$pack_type,$pack_part)=@{$package};
5873: next if ($pack_part ne $part);
5874: if (defined($packagetab{"$pack_type&$name&default"})) {
5875: return $packagetab{"$pack_type&$name&default"};
5876: }
5877: }
5878: # look for any possible matching non extension_ package
5879: foreach my $package (@specifics) {
5880: my (undef,$pack_type,$pack_part)=@{$package};
5881: if (defined($packagetab{"$pack_type&$name&default"})) {
5882: return $packagetab{"$pack_type&$name&default"};
5883: }
5884: if ($pack_type eq 'part') { $pack_part='0'; }
5885: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
5886: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
5887: }
5888: }
5889: # look for any posible extension_ match
5890: foreach my $package (@extension) {
5891: my ($package,$pack_type)=@{$package};
5892: if (defined($packagetab{"$pack_type&$name&default"})) {
5893: return $packagetab{"$pack_type&$name&default"};
5894: }
5895: if (defined($packagetab{$package."&$name&default"})) {
5896: return $packagetab{$package."&$name&default"};
5897: }
5898: }
5899: # look for a global default setting
5900: if ($do_default && defined($packagetab{"default&$name&default"})) {
5901: return $packagetab{"default&$name&default"};
5902: }
5903: return undef;
5904: }
5905:
5906: sub add_prefix_and_part {
5907: my ($prefix,$part)=@_;
5908: my $keyroot;
5909: if (defined($prefix) && $prefix !~ /^__/) {
5910: # prefix that has a part already
5911: $keyroot=$prefix;
5912: } elsif (defined($prefix)) {
5913: # prefix that is missing a part
5914: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
5915: } else {
5916: # no prefix at all
5917: if (defined($part)) { $keyroot='_'.$part; }
5918: }
5919: return $keyroot;
5920: }
5921:
5922: # ---------------------------------------------------------------- Get metadata
5923:
5924: my %metaentry;
5925: sub metadata {
5926: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
5927: $uri=&declutter($uri);
5928: # if it is a non metadata possible uri return quickly
5929: if (($uri eq '') ||
5930: (($uri =~ m|^/*adm/|) &&
5931: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
5932: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
5933: ($uri =~ m|home/[^/]+/public_html/|)) {
5934: return undef;
5935: }
5936: my $filename=$uri;
5937: $uri=~s/\.meta$//;
5938: #
5939: # Is the metadata already cached?
5940: # Look at timestamp of caching
5941: # Everything is cached by the main uri, libraries are never directly cached
5942: #
5943: if (!defined($liburi)) {
5944: my ($result,$cached)=&is_cached_new('meta',$uri);
5945: if (defined($cached)) { return $result->{':'.$what}; }
5946: }
5947: {
5948: #
5949: # Is this a recursive call for a library?
5950: #
5951: # if (! exists($metacache{$uri})) {
5952: # $metacache{$uri}={};
5953: # }
5954: if ($liburi) {
5955: $liburi=&declutter($liburi);
5956: $filename=$liburi;
5957: } else {
5958: &devalidate_cache_new('meta',$uri);
5959: undef(%metaentry);
5960: }
5961: my %metathesekeys=();
5962: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
5963: my $metastring;
5964: if ($uri !~ m -^(editupload)/-) {
5965: my $file=&filelocation('',&clutter($filename));
5966: #push(@{$metaentry{$uri.'.file'}},$file);
5967: $metastring=&getfile($file);
5968: }
5969: my $parser=HTML::LCParser->new(\$metastring);
5970: my $token;
5971: undef %metathesekeys;
5972: while ($token=$parser->get_token) {
5973: if ($token->[0] eq 'S') {
5974: if (defined($token->[2]->{'package'})) {
5975: #
5976: # This is a package - get package info
5977: #
5978: my $package=$token->[2]->{'package'};
5979: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5980: if (defined($token->[2]->{'id'})) {
5981: $keyroot.='_'.$token->[2]->{'id'};
5982: }
5983: if ($metaentry{':packages'}) {
5984: $metaentry{':packages'}.=','.$package.$keyroot;
5985: } else {
5986: $metaentry{':packages'}=$package.$keyroot;
5987: }
5988: foreach my $pack_entry (keys(%packagetab)) {
5989: my $part=$keyroot;
5990: $part=~s/^\_//;
5991: if ($pack_entry=~/^\Q$package\E\&/ ||
5992: $pack_entry=~/^\Q$package\E_0\&/) {
5993: my ($pack,$name,$subp)=split(/\&/,$pack_entry);
5994: # ignore package.tab specified default values
5995: # here &package_tab_default() will fetch those
5996: if ($subp eq 'default') { next; }
5997: my $value=$packagetab{$pack_entry};
5998: my $unikey;
5999: if ($pack =~ /_0$/) {
6000: $unikey='parameter_0_'.$name;
6001: $part=0;
6002: } else {
6003: $unikey='parameter'.$keyroot.'_'.$name;
6004: }
6005: if ($subp eq 'display') {
6006: $value.=' [Part: '.$part.']';
6007: }
6008: $metaentry{':'.$unikey.'.part'}=$part;
6009: $metathesekeys{$unikey}=1;
6010: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6011: $metaentry{':'.$unikey.'.'.$subp}=$value;
6012: }
6013: if (defined($metaentry{':'.$unikey.'.default'})) {
6014: $metaentry{':'.$unikey}=
6015: $metaentry{':'.$unikey.'.default'};
6016: }
6017: }
6018: }
6019: } else {
6020: #
6021: # This is not a package - some other kind of start tag
6022: #
6023: my $entry=$token->[1];
6024: my $unikey;
6025: if ($entry eq 'import') {
6026: $unikey='';
6027: } else {
6028: $unikey=$entry;
6029: }
6030: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6031:
6032: if (defined($token->[2]->{'id'})) {
6033: $unikey.='_'.$token->[2]->{'id'};
6034: }
6035:
6036: if ($entry eq 'import') {
6037: #
6038: # Importing a library here
6039: #
6040: if ($depthcount<20) {
6041: my $location=$parser->get_text('/import');
6042: my $dir=$filename;
6043: $dir=~s|[^/]*$||;
6044: $location=&filelocation($dir,$location);
6045: my $metadata =
6046: &metadata($uri,'keys', $location,$unikey,
6047: $depthcount+1);
6048: foreach my $meta (split(',',$metadata)) {
6049: $metaentry{':'.$meta}=$metaentry{':'.$meta};
6050: $metathesekeys{$meta}=1;
6051: }
6052: }
6053: } else {
6054:
6055: if (defined($token->[2]->{'name'})) {
6056: $unikey.='_'.$token->[2]->{'name'};
6057: }
6058: $metathesekeys{$unikey}=1;
6059: foreach my $param (@{$token->[3]}) {
6060: $metaentry{':'.$unikey.'.'.$param} =
6061: $token->[2]->{$param};
6062: }
6063: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
6064: my $default=$metaentry{':'.$unikey.'.default'};
6065: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
6066: # only ws inside the tag, and not in default, so use default
6067: # as value
6068: $metaentry{':'.$unikey}=$default;
6069: } else {
6070: # either something interesting inside the tag or default
6071: # uninteresting
6072: $metaentry{':'.$unikey}=$internaltext;
6073: }
6074: # end of not-a-package not-a-library import
6075: }
6076: # end of not-a-package start tag
6077: }
6078: # the next is the end of "start tag"
6079: }
6080: }
6081: my ($extension) = ($uri =~ /\.(\w+)$/);
6082: foreach my $key (keys(%packagetab)) {
6083: #no specific packages #how's our extension
6084: if ($key!~/^extension_\Q$extension\E&/) { next; }
6085: &metadata_create_package_def($uri,$key,'extension_'.$extension,
6086: \%metathesekeys);
6087: }
6088: if (!exists($metaentry{':packages'})) {
6089: foreach my $key (keys(%packagetab)) {
6090: #no specific packages well let's get default then
6091: if ($key!~/^default&/) { next; }
6092: &metadata_create_package_def($uri,$key,'default',
6093: \%metathesekeys);
6094: }
6095: }
6096: # are there custom rights to evaluate
6097: if ($metaentry{':copyright'} eq 'custom') {
6098:
6099: #
6100: # Importing a rights file here
6101: #
6102: unless ($depthcount) {
6103: my $location=$metaentry{':customdistributionfile'};
6104: my $dir=$filename;
6105: $dir=~s|[^/]*$||;
6106: $location=&filelocation($dir,$location);
6107: my $rights_metadata =
6108: &metadata($uri,'keys',$location,'_rights',
6109: $depthcount+1);
6110: foreach my $rights (split(',',$rights_metadata)) {
6111: #$metaentry{':'.$rights}=$metacache{$uri}->{':'.$rights};
6112: $metathesekeys{$rights}=1;
6113: }
6114: }
6115: }
6116: # uniqifiy package listing
6117: my %seen;
6118: my @uniq_packages =
6119: grep { ! $seen{$_} ++ } (split(',',$metaentry{':packages'}));
6120: $metaentry{':packages'} = join(',',@uniq_packages);
6121:
6122: $metaentry{':keys'} = join(',',keys(%metathesekeys));
6123: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
6124: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
6125: &do_cache_new('meta',$uri,\%metaentry,60*60);
6126: # this is the end of "was not already recently cached
6127: }
6128: return $metaentry{':'.$what};
6129: }
6130:
6131: sub metadata_create_package_def {
6132: my ($uri,$key,$package,$metathesekeys)=@_;
6133: my ($pack,$name,$subp)=split(/\&/,$key);
6134: if ($subp eq 'default') { next; }
6135:
6136: if (defined($metaentry{':packages'})) {
6137: $metaentry{':packages'}.=','.$package;
6138: } else {
6139: $metaentry{':packages'}=$package;
6140: }
6141: my $value=$packagetab{$key};
6142: my $unikey;
6143: $unikey='parameter_0_'.$name;
6144: $metaentry{':'.$unikey.'.part'}=0;
6145: $$metathesekeys{$unikey}=1;
6146: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6147: $metaentry{':'.$unikey.'.'.$subp}=$value;
6148: }
6149: if (defined($metaentry{':'.$unikey.'.default'})) {
6150: $metaentry{':'.$unikey}=
6151: $metaentry{':'.$unikey.'.default'};
6152: }
6153: }
6154:
6155: sub metadata_generate_part0 {
6156: my ($metadata,$metacache,$uri) = @_;
6157: my %allnames;
6158: foreach my $metakey (keys(%$metadata)) {
6159: if ($metakey=~/^parameter\_(.*)/) {
6160: my $part=$$metacache{':'.$metakey.'.part'};
6161: my $name=$$metacache{':'.$metakey.'.name'};
6162: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
6163: $allnames{$name}=$part;
6164: }
6165: }
6166: }
6167: foreach my $name (keys(%allnames)) {
6168: $$metadata{"parameter_0_$name"}=1;
6169: my $key=":parameter_0_$name";
6170: $$metacache{"$key.part"}='0';
6171: $$metacache{"$key.name"}=$name;
6172: $$metacache{"$key.type"}=$$metacache{':parameter_'.
6173: $allnames{$name}.'_'.$name.
6174: '.type'};
6175: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
6176: '.display'};
6177: my $expr='[Part: '.$allnames{$name}.']';
6178: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
6179: $$metacache{"$key.display"}=$olddis;
6180: }
6181: }
6182:
6183: # ------------------------------------------------------ Devalidate title cache
6184:
6185: sub devalidate_title_cache {
6186: my ($url)=@_;
6187: if (!$env{'request.course.id'}) { return; }
6188: my $symb=&symbread($url);
6189: if (!$symb) { return; }
6190: my $key=$env{'request.course.id'}."\0".$symb;
6191: &devalidate_cache_new('title',$key);
6192: }
6193:
6194: # ------------------------------------------------- Get the title of a resource
6195:
6196: sub gettitle {
6197: my $urlsymb=shift;
6198: my $symb=&symbread($urlsymb);
6199: if ($symb) {
6200: my $key=$env{'request.course.id'}."\0".$symb;
6201: my ($result,$cached)=&is_cached_new('title',$key);
6202: if (defined($cached)) {
6203: return $result;
6204: }
6205: my ($map,$resid,$url)=&decode_symb($symb);
6206: my $title='';
6207: my %bighash;
6208: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6209: &GDBM_READER(),0640)) {
6210: my $mapid=$bighash{'map_pc_'.&clutter($map)};
6211: $title=$bighash{'title_'.$mapid.'.'.$resid};
6212: untie %bighash;
6213: }
6214: $title=~s/\&colon\;/\:/gs;
6215: if ($title) {
6216: return &do_cache_new('title',$key,$title,600);
6217: }
6218: $urlsymb=$url;
6219: }
6220: my $title=&metadata($urlsymb,'title');
6221: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
6222: return $title;
6223: }
6224:
6225: sub get_slot {
6226: my ($which,$cnum,$cdom)=@_;
6227: if (!$cnum || !$cdom) {
6228: (undef,my $courseid)=&whichuser();
6229: $cdom=$env{'course.'.$courseid.'.domain'};
6230: $cnum=$env{'course.'.$courseid.'.num'};
6231: }
6232: my $key=join("\0",'slots',$cdom,$cnum,$which);
6233: my %slotinfo;
6234: if (exists($remembered{$key})) {
6235: $slotinfo{$which} = $remembered{$key};
6236: } else {
6237: %slotinfo=&get('slots',[$which],$cdom,$cnum);
6238: &Apache::lonhomework::showhash(%slotinfo);
6239: my ($tmp)=keys(%slotinfo);
6240: if ($tmp=~/^error:/) { return (); }
6241: $remembered{$key} = $slotinfo{$which};
6242: }
6243: if (ref($slotinfo{$which}) eq 'HASH') {
6244: return %{$slotinfo{$which}};
6245: }
6246: return $slotinfo{$which};
6247: }
6248: # ------------------------------------------------- Update symbolic store links
6249:
6250: sub symblist {
6251: my ($mapname,%newhash)=@_;
6252: $mapname=&deversion(&declutter($mapname));
6253: my %hash;
6254: if (($env{'request.course.fn'}) && (%newhash)) {
6255: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6256: &GDBM_WRCREAT(),0640)) {
6257: foreach my $url (keys %newhash) {
6258: next if ($url eq 'last_known'
6259: && $env{'form.no_update_last_known'});
6260: $hash{declutter($url)}=&encode_symb($mapname,
6261: $newhash{$url}->[1],
6262: $newhash{$url}->[0]);
6263: }
6264: if (untie(%hash)) {
6265: return 'ok';
6266: }
6267: }
6268: }
6269: return 'error';
6270: }
6271:
6272: # --------------------------------------------------------------- Verify a symb
6273:
6274: sub symbverify {
6275: my ($symb,$thisurl)=@_;
6276: my $thisfn=$thisurl;
6277: $thisfn=&declutter($thisfn);
6278: # direct jump to resource in page or to a sequence - will construct own symbs
6279: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
6280: # check URL part
6281: my ($map,$resid,$url)=&decode_symb($symb);
6282:
6283: unless ($url eq $thisfn) { return 0; }
6284:
6285: $symb=&symbclean($symb);
6286: $thisurl=&deversion($thisurl);
6287: $thisfn=&deversion($thisfn);
6288:
6289: my %bighash;
6290: my $okay=0;
6291:
6292: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6293: &GDBM_READER(),0640)) {
6294: my $ids=$bighash{'ids_'.&clutter($thisurl)};
6295: unless ($ids) {
6296: $ids=$bighash{'ids_/'.$thisurl};
6297: }
6298: if ($ids) {
6299: # ------------------------------------------------------------------- Has ID(s)
6300: foreach (split(/\,/,$ids)) {
6301: my ($mapid,$resid)=split(/\./,$_);
6302: if (
6303: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
6304: eq $symb) {
6305: if (($env{'request.role.adv'}) ||
6306: $bighash{'encrypted_'.$_} eq $env{'request.enc'}) {
6307: $okay=1;
6308: }
6309: }
6310: }
6311: }
6312: untie(%bighash);
6313: }
6314: return $okay;
6315: }
6316:
6317: # --------------------------------------------------------------- Clean-up symb
6318:
6319: sub symbclean {
6320: my $symb=shift;
6321: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6322: # remove version from map
6323: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
6324:
6325: # remove version from URL
6326: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
6327:
6328: # remove wrapper
6329:
6330: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
6331: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
6332: return $symb;
6333: }
6334:
6335: # ---------------------------------------------- Split symb to find map and url
6336:
6337: sub encode_symb {
6338: my ($map,$resid,$url)=@_;
6339: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
6340: }
6341:
6342: sub decode_symb {
6343: my $symb=shift;
6344: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6345: my ($map,$resid,$url)=split(/___/,$symb);
6346: return (&fixversion($map),$resid,&fixversion($url));
6347: }
6348:
6349: sub fixversion {
6350: my $fn=shift;
6351: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
6352: my %bighash;
6353: my $uri=&clutter($fn);
6354: my $key=$env{'request.course.id'}.'_'.$uri;
6355: # is this cached?
6356: my ($result,$cached)=&is_cached_new('courseresversion',$key);
6357: if (defined($cached)) { return $result; }
6358: # unfortunately not cached, or expired
6359: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6360: &GDBM_READER(),0640)) {
6361: if ($bighash{'version_'.$uri}) {
6362: my $version=$bighash{'version_'.$uri};
6363: unless (($version eq 'mostrecent') ||
6364: ($version==&getversion($uri))) {
6365: $uri=~s/\.(\w+)$/\.$version\.$1/;
6366: }
6367: }
6368: untie %bighash;
6369: }
6370: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
6371: }
6372:
6373: sub deversion {
6374: my $url=shift;
6375: $url=~s/\.\d+\.(\w+)$/\.$1/;
6376: return $url;
6377: }
6378:
6379: # ------------------------------------------------------ Return symb list entry
6380:
6381: sub symbread {
6382: my ($thisfn,$donotrecurse)=@_;
6383: my $cache_str='request.symbread.cached.'.$thisfn;
6384: if (defined($env{$cache_str})) { return $env{$cache_str}; }
6385: # no filename provided? try from environment
6386: unless ($thisfn) {
6387: if ($env{'request.symb'}) {
6388: return $env{$cache_str}=&symbclean($env{'request.symb'});
6389: }
6390: $thisfn=$env{'request.filename'};
6391: }
6392: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
6393: # is that filename actually a symb? Verify, clean, and return
6394: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
6395: if (&symbverify($thisfn,$1)) {
6396: return $env{$cache_str}=&symbclean($thisfn);
6397: }
6398: }
6399: $thisfn=declutter($thisfn);
6400: my %hash;
6401: my %bighash;
6402: my $syval='';
6403: if (($env{'request.course.fn'}) && ($thisfn)) {
6404: my $targetfn = $thisfn;
6405: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
6406: $targetfn = 'adm/wrapper/'.$thisfn;
6407: }
6408: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
6409: $targetfn=$1;
6410: }
6411: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6412: &GDBM_READER(),0640)) {
6413: $syval=$hash{$targetfn};
6414: untie(%hash);
6415: }
6416: # ---------------------------------------------------------- There was an entry
6417: if ($syval) {
6418: #unless ($syval=~/\_\d+$/) {
6419: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
6420: #&appenv('request.ambiguous' => $thisfn);
6421: #return $env{$cache_str}='';
6422: #}
6423: #$syval.=$1;
6424: #}
6425: } else {
6426: # ------------------------------------------------------- Was not in symb table
6427: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6428: &GDBM_READER(),0640)) {
6429: # ---------------------------------------------- Get ID(s) for current resource
6430: my $ids=$bighash{'ids_'.&clutter($thisfn)};
6431: unless ($ids) {
6432: $ids=$bighash{'ids_/'.$thisfn};
6433: }
6434: unless ($ids) {
6435: # alias?
6436: $ids=$bighash{'mapalias_'.$thisfn};
6437: }
6438: if ($ids) {
6439: # ------------------------------------------------------------------- Has ID(s)
6440: my @possibilities=split(/\,/,$ids);
6441: if ($#possibilities==0) {
6442: # ----------------------------------------------- There is only one possibility
6443: my ($mapid,$resid)=split(/\./,$ids);
6444: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6445: $resid,$thisfn);
6446: } elsif (!$donotrecurse) {
6447: # ------------------------------------------ There is more than one possibility
6448: my $realpossible=0;
6449: foreach (@possibilities) {
6450: my $file=$bighash{'src_'.$_};
6451: if (&allowed('bre',$file)) {
6452: my ($mapid,$resid)=split(/\./,$_);
6453: if ($bighash{'map_type_'.$mapid} ne 'page') {
6454: $realpossible++;
6455: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6456: $resid,$thisfn);
6457: }
6458: }
6459: }
6460: if ($realpossible!=1) { $syval=''; }
6461: } else {
6462: $syval='';
6463: }
6464: }
6465: untie(%bighash)
6466: }
6467: }
6468: if ($syval) {
6469: return $env{$cache_str}=$syval;
6470: }
6471: }
6472: &appenv('request.ambiguous' => $thisfn);
6473: return $env{$cache_str}='';
6474: }
6475:
6476: # ---------------------------------------------------------- Return random seed
6477:
6478: sub numval {
6479: my $txt=shift;
6480: $txt=~tr/A-J/0-9/;
6481: $txt=~tr/a-j/0-9/;
6482: $txt=~tr/K-T/0-9/;
6483: $txt=~tr/k-t/0-9/;
6484: $txt=~tr/U-Z/0-5/;
6485: $txt=~tr/u-z/0-5/;
6486: $txt=~s/\D//g;
6487: if ($_64bit) { if ($txt > 2**32) { return -1; } }
6488: return int($txt);
6489: }
6490:
6491: sub numval2 {
6492: my $txt=shift;
6493: $txt=~tr/A-J/0-9/;
6494: $txt=~tr/a-j/0-9/;
6495: $txt=~tr/K-T/0-9/;
6496: $txt=~tr/k-t/0-9/;
6497: $txt=~tr/U-Z/0-5/;
6498: $txt=~tr/u-z/0-5/;
6499: $txt=~s/\D//g;
6500: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6501: my $total;
6502: foreach my $val (@txts) { $total+=$val; }
6503: if ($_64bit) { if ($total > 2**32) { return -1; } }
6504: return int($total);
6505: }
6506:
6507: sub numval3 {
6508: use integer;
6509: my $txt=shift;
6510: $txt=~tr/A-J/0-9/;
6511: $txt=~tr/a-j/0-9/;
6512: $txt=~tr/K-T/0-9/;
6513: $txt=~tr/k-t/0-9/;
6514: $txt=~tr/U-Z/0-5/;
6515: $txt=~tr/u-z/0-5/;
6516: $txt=~s/\D//g;
6517: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6518: my $total;
6519: foreach my $val (@txts) { $total+=$val; }
6520: if ($_64bit) { $total=(($total<<32)>>32); }
6521: return $total;
6522: }
6523:
6524: sub digest {
6525: my ($data)=@_;
6526: my $digest=&Digest::MD5::md5($data);
6527: my ($a,$b,$c,$d)=unpack("iiii",$digest);
6528: my ($e,$f);
6529: {
6530: use integer;
6531: $e=($a+$b);
6532: $f=($c+$d);
6533: if ($_64bit) {
6534: $e=(($e<<32)>>32);
6535: $f=(($f<<32)>>32);
6536: }
6537: }
6538: if (wantarray) {
6539: return ($e,$f);
6540: } else {
6541: my $g;
6542: {
6543: use integer;
6544: $g=($e+$f);
6545: if ($_64bit) {
6546: $g=(($g<<32)>>32);
6547: }
6548: }
6549: return $g;
6550: }
6551: }
6552:
6553: sub latest_rnd_algorithm_id {
6554: return '64bit5';
6555: }
6556:
6557: sub get_rand_alg {
6558: my ($courseid)=@_;
6559: if (!$courseid) { $courseid=(&whichuser())[1]; }
6560: if ($courseid) {
6561: return $env{"course.$courseid.rndseed"};
6562: }
6563: return &latest_rnd_algorithm_id();
6564: }
6565:
6566: sub validCODE {
6567: my ($CODE)=@_;
6568: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
6569: return 0;
6570: }
6571:
6572: sub getCODE {
6573: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
6574: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
6575: defined($Apache::lonhomework::parsing_a_task) ) &&
6576: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
6577: return $Apache::lonhomework::history{'resource.CODE'};
6578: }
6579: return undef;
6580: }
6581:
6582: sub rndseed {
6583: my ($symb,$courseid,$domain,$username)=@_;
6584:
6585: my ($wsymb,$wcourseid,$wdomain,$wusername)=&whichuser();
6586: if (!$symb) {
6587: unless ($symb=$wsymb) { return time; }
6588: }
6589: if (!$courseid) { $courseid=$wcourseid; }
6590: if (!$domain) { $domain=$wdomain; }
6591: if (!$username) { $username=$wusername }
6592: my $which=&get_rand_alg();
6593: if (defined(&getCODE())) {
6594: if ($which eq '64bit5') {
6595: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
6596: } elsif ($which eq '64bit4') {
6597: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
6598: } else {
6599: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
6600: }
6601: } elsif ($which eq '64bit5') {
6602: return &rndseed_64bit5($symb,$courseid,$domain,$username);
6603: } elsif ($which eq '64bit4') {
6604: return &rndseed_64bit4($symb,$courseid,$domain,$username);
6605: } elsif ($which eq '64bit3') {
6606: return &rndseed_64bit3($symb,$courseid,$domain,$username);
6607: } elsif ($which eq '64bit2') {
6608: return &rndseed_64bit2($symb,$courseid,$domain,$username);
6609: } elsif ($which eq '64bit') {
6610: return &rndseed_64bit($symb,$courseid,$domain,$username);
6611: }
6612: return &rndseed_32bit($symb,$courseid,$domain,$username);
6613: }
6614:
6615: sub rndseed_32bit {
6616: my ($symb,$courseid,$domain,$username)=@_;
6617: {
6618: use integer;
6619: my $symbchck=unpack("%32C*",$symb) << 27;
6620: my $symbseed=numval($symb) << 22;
6621: my $namechck=unpack("%32C*",$username) << 17;
6622: my $nameseed=numval($username) << 12;
6623: my $domainseed=unpack("%32C*",$domain) << 7;
6624: my $courseseed=unpack("%32C*",$courseid);
6625: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
6626: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6627: #&logthis("rndseed :$num:$symb");
6628: if ($_64bit) { $num=(($num<<32)>>32); }
6629: return $num;
6630: }
6631: }
6632:
6633: sub rndseed_64bit {
6634: my ($symb,$courseid,$domain,$username)=@_;
6635: {
6636: use integer;
6637: my $symbchck=unpack("%32S*",$symb) << 21;
6638: my $symbseed=numval($symb) << 10;
6639: my $namechck=unpack("%32S*",$username);
6640:
6641: my $nameseed=numval($username) << 21;
6642: my $domainseed=unpack("%32S*",$domain) << 10;
6643: my $courseseed=unpack("%32S*",$courseid);
6644:
6645: my $num1=$symbchck+$symbseed+$namechck;
6646: my $num2=$nameseed+$domainseed+$courseseed;
6647: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6648: #&logthis("rndseed :$num:$symb");
6649: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6650: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6651: return "$num1,$num2";
6652: }
6653: }
6654:
6655: sub rndseed_64bit2 {
6656: my ($symb,$courseid,$domain,$username)=@_;
6657: {
6658: use integer;
6659: # strings need to be an even # of cahracters long, it it is odd the
6660: # last characters gets thrown away
6661: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6662: my $symbseed=numval($symb) << 10;
6663: my $namechck=unpack("%32S*",$username.' ');
6664:
6665: my $nameseed=numval($username) << 21;
6666: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6667: my $courseseed=unpack("%32S*",$courseid.' ');
6668:
6669: my $num1=$symbchck+$symbseed+$namechck;
6670: my $num2=$nameseed+$domainseed+$courseseed;
6671: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6672: #&logthis("rndseed :$num:$symb");
6673: return "$num1,$num2";
6674: }
6675: }
6676:
6677: sub rndseed_64bit3 {
6678: my ($symb,$courseid,$domain,$username)=@_;
6679: {
6680: use integer;
6681: # strings need to be an even # of cahracters long, it it is odd the
6682: # last characters gets thrown away
6683: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6684: my $symbseed=numval2($symb) << 10;
6685: my $namechck=unpack("%32S*",$username.' ');
6686:
6687: my $nameseed=numval2($username) << 21;
6688: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6689: my $courseseed=unpack("%32S*",$courseid.' ');
6690:
6691: my $num1=$symbchck+$symbseed+$namechck;
6692: my $num2=$nameseed+$domainseed+$courseseed;
6693: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6694: #&logthis("rndseed :$num1:$num2:$_64bit");
6695: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6696:
6697: return "$num1:$num2";
6698: }
6699: }
6700:
6701: sub rndseed_64bit4 {
6702: my ($symb,$courseid,$domain,$username)=@_;
6703: {
6704: use integer;
6705: # strings need to be an even # of cahracters long, it it is odd the
6706: # last characters gets thrown away
6707: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6708: my $symbseed=numval3($symb) << 10;
6709: my $namechck=unpack("%32S*",$username.' ');
6710:
6711: my $nameseed=numval3($username) << 21;
6712: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6713: my $courseseed=unpack("%32S*",$courseid.' ');
6714:
6715: my $num1=$symbchck+$symbseed+$namechck;
6716: my $num2=$nameseed+$domainseed+$courseseed;
6717: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6718: #&logthis("rndseed :$num1:$num2:$_64bit");
6719: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6720:
6721: return "$num1:$num2";
6722: }
6723: }
6724:
6725: sub rndseed_64bit5 {
6726: my ($symb,$courseid,$domain,$username)=@_;
6727: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
6728: return "$num1:$num2";
6729: }
6730:
6731: sub rndseed_CODE_64bit {
6732: my ($symb,$courseid,$domain,$username)=@_;
6733: {
6734: use integer;
6735: my $symbchck=unpack("%32S*",$symb.' ') << 16;
6736: my $symbseed=numval2($symb);
6737: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
6738: my $CODEseed=numval(&getCODE());
6739: my $courseseed=unpack("%32S*",$courseid.' ');
6740: my $num1=$symbseed+$CODEchck;
6741: my $num2=$CODEseed+$courseseed+$symbchck;
6742: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
6743: #&logthis("rndseed :$num1:$num2:$symb");
6744: if ($_64bit) { $num1=(($num1<<32)>>32); }
6745: if ($_64bit) { $num2=(($num2<<32)>>32); }
6746: return "$num1:$num2";
6747: }
6748: }
6749:
6750: sub rndseed_CODE_64bit4 {
6751: my ($symb,$courseid,$domain,$username)=@_;
6752: {
6753: use integer;
6754: my $symbchck=unpack("%32S*",$symb.' ') << 16;
6755: my $symbseed=numval3($symb);
6756: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
6757: my $CODEseed=numval3(&getCODE());
6758: my $courseseed=unpack("%32S*",$courseid.' ');
6759: my $num1=$symbseed+$CODEchck;
6760: my $num2=$CODEseed+$courseseed+$symbchck;
6761: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
6762: #&logthis("rndseed :$num1:$num2:$symb");
6763: if ($_64bit) { $num1=(($num1<<32)>>32); }
6764: if ($_64bit) { $num2=(($num2<<32)>>32); }
6765: return "$num1:$num2";
6766: }
6767: }
6768:
6769: sub rndseed_CODE_64bit5 {
6770: my ($symb,$courseid,$domain,$username)=@_;
6771: my $code = &getCODE();
6772: my ($num1,$num2)=&digest("$symb,$courseid,$code");
6773: return "$num1:$num2";
6774: }
6775:
6776: sub setup_random_from_rndseed {
6777: my ($rndseed)=@_;
6778: if ($rndseed =~/([,:])/) {
6779: my ($num1,$num2)=split(/[,:]/,$rndseed);
6780: &Math::Random::random_set_seed(abs($num1),abs($num2));
6781: } else {
6782: &Math::Random::random_set_seed_from_phrase($rndseed);
6783: }
6784: }
6785:
6786: sub latest_receipt_algorithm_id {
6787: return 'receipt2';
6788: }
6789:
6790: sub recunique {
6791: my $fucourseid=shift;
6792: my $unique;
6793: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
6794: $unique=$env{"course.$fucourseid.internal.encseed"};
6795: } else {
6796: $unique=$perlvar{'lonReceipt'};
6797: }
6798: return unpack("%32C*",$unique);
6799: }
6800:
6801: sub recprefix {
6802: my $fucourseid=shift;
6803: my $prefix;
6804: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
6805: $prefix=$env{"course.$fucourseid.internal.encpref"};
6806: } else {
6807: $prefix=$perlvar{'lonHostID'};
6808: }
6809: return unpack("%32C*",$prefix);
6810: }
6811:
6812: sub ireceipt {
6813: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
6814: my $cuname=unpack("%32C*",$funame);
6815: my $cudom=unpack("%32C*",$fudom);
6816: my $cucourseid=unpack("%32C*",$fucourseid);
6817: my $cusymb=unpack("%32C*",$fusymb);
6818: my $cunique=&recunique($fucourseid);
6819: my $cpart=unpack("%32S*",$part);
6820: my $return =&recprefix($fucourseid).'-';
6821: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
6822: $env{'request.state'} eq 'construct') {
6823: #&logthis("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname)." and ".($cpart%$cudom));
6824:
6825: $return.= ($cunique%$cuname+
6826: $cunique%$cudom+
6827: $cusymb%$cuname+
6828: $cusymb%$cudom+
6829: $cucourseid%$cuname+
6830: $cucourseid%$cudom+
6831: $cpart%$cuname+
6832: $cpart%$cudom);
6833: } else {
6834: $return.= ($cunique%$cuname+
6835: $cunique%$cudom+
6836: $cusymb%$cuname+
6837: $cusymb%$cudom+
6838: $cucourseid%$cuname+
6839: $cucourseid%$cudom);
6840: }
6841: return $return;
6842: }
6843:
6844: sub receipt {
6845: my ($part)=@_;
6846: my ($symb,$courseid,$domain,$name) = &whichuser();
6847: return &ireceipt($name,$domain,$courseid,$symb,$part);
6848: }
6849:
6850: sub whichuser {
6851: my ($passedsymb)=@_;
6852: my ($symb,$courseid,$domain,$name,$publicuser);
6853: if (defined($env{'form.grade_symb'})) {
6854: my ($tmp_courseid)=&get_env_multiple('form.grade_courseid');
6855: my $allowed=&allowed('vgr',$tmp_courseid);
6856: if (!$allowed &&
6857: exists($env{'request.course.sec'}) &&
6858: $env{'request.course.sec'} !~ /^\s*$/) {
6859: $allowed=&allowed('vgr',$tmp_courseid.
6860: '/'.$env{'request.course.sec'});
6861: }
6862: if ($allowed) {
6863: ($symb)=&get_env_multiple('form.grade_symb');
6864: $courseid=$tmp_courseid;
6865: ($domain)=&get_env_multiple('form.grade_domain');
6866: ($name)=&get_env_multiple('form.grade_username');
6867: return ($symb,$courseid,$domain,$name,$publicuser);
6868: }
6869: }
6870: if (!$passedsymb) {
6871: $symb=&symbread();
6872: } else {
6873: $symb=$passedsymb;
6874: }
6875: $courseid=$env{'request.course.id'};
6876: $domain=$env{'user.domain'};
6877: $name=$env{'user.name'};
6878: if ($name eq 'public' && $domain eq 'public') {
6879: if (!defined($env{'form.username'})) {
6880: $env{'form.username'}.=time.rand(10000000);
6881: }
6882: $name.=$env{'form.username'};
6883: }
6884: return ($symb,$courseid,$domain,$name,$publicuser);
6885:
6886: }
6887:
6888: # ------------------------------------------------------------ Serves up a file
6889: # returns either the contents of the file or
6890: # -1 if the file doesn't exist
6891: #
6892: # if the target is a file that was uploaded via DOCS,
6893: # a check will be made to see if a current copy exists on the local server,
6894: # if it does this will be served, otherwise a copy will be retrieved from
6895: # the home server for the course and stored in /home/httpd/html/userfiles on
6896: # the local server.
6897:
6898: sub getfile {
6899: my ($file) = @_;
6900: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
6901: &repcopy($file);
6902: return &readfile($file);
6903: }
6904:
6905: sub repcopy_userfile {
6906: my ($file)=@_;
6907: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
6908: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
6909: my ($cdom,$cnum,$filename) =
6910: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
6911: my ($info,$rtncode);
6912: my $uri="/uploaded/$cdom/$cnum/$filename";
6913: if (-e "$file") {
6914: my @fileinfo = stat($file);
6915: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
6916: if ($lwpresp ne 'ok') {
6917: if ($rtncode eq '404') {
6918: unlink($file);
6919: }
6920: #my $ua=new LWP::UserAgent;
6921: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6922: #my $response=$ua->request($request);
6923: #if ($response->is_success()) {
6924: # return $response->content;
6925: # } else {
6926: # return -1;
6927: # }
6928: return -1;
6929: }
6930: if ($info < $fileinfo[9]) {
6931: return 'ok';
6932: }
6933: $info = '';
6934: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
6935: if ($lwpresp ne 'ok') {
6936: return -1;
6937: }
6938: } else {
6939: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
6940: if ($lwpresp ne 'ok') {
6941: my $ua=new LWP::UserAgent;
6942: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6943: my $response=$ua->request($request);
6944: if ($response->is_success()) {
6945: $info=$response->content;
6946: } else {
6947: return -1;
6948: }
6949: }
6950: my @parts = ($cdom,$cnum);
6951: if ($filename =~ m|^(.+)/[^/]+$|) {
6952: push @parts, split(/\//,$1);
6953: }
6954: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
6955: foreach my $part (@parts) {
6956: $path .= '/'.$part;
6957: if (!-e $path) {
6958: mkdir($path,0770);
6959: }
6960: }
6961: }
6962: open(FILE,">$file");
6963: print FILE $info;
6964: close(FILE);
6965: return 'ok';
6966: }
6967:
6968: sub tokenwrapper {
6969: my $uri=shift;
6970: $uri=~s|^http\://([^/]+)||;
6971: $uri=~s|^/||;
6972: $env{'user.environment'}=~/\/([^\/]+)\.id/;
6973: my $token=$1;
6974: my (undef,$udom,$uname,$file)=split('/',$uri,4);
6975: if ($udom && $uname && $file) {
6976: $file=~s|(\?\.*)*$||;
6977: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
6978: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
6979: (($uri=~/\?/)?'&':'?').'token='.$token.
6980: '&tokenissued='.$perlvar{'lonHostID'};
6981: } else {
6982: return '/adm/notfound.html';
6983: }
6984: }
6985:
6986: sub getuploaded {
6987: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
6988: $uri=~s/^\///;
6989: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
6990: my $ua=new LWP::UserAgent;
6991: my $request=new HTTP::Request($reqtype,$uri);
6992: my $response=$ua->request($request);
6993: $$rtncode = $response->code;
6994: if (! $response->is_success()) {
6995: return 'failed';
6996: }
6997: if ($reqtype eq 'HEAD') {
6998: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
6999: } elsif ($reqtype eq 'GET') {
7000: $$info = $response->content;
7001: }
7002: return 'ok';
7003: }
7004:
7005: sub readfile {
7006: my $file = shift;
7007: if ( (! -e $file ) || ($file eq '') ) { return -1; };
7008: my $fh;
7009: open($fh,"<$file");
7010: my $a='';
7011: while (<$fh>) { $a .=$_; }
7012: return $a;
7013: }
7014:
7015: sub filelocation {
7016: my ($dir,$file) = @_;
7017: my $location;
7018: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
7019:
7020: if ($file =~ m-^/adm/-) {
7021: $file=~s-^/adm/wrapper/-/-;
7022: $file=~s-^/adm/coursedocs/showdoc/-/-;
7023: }
7024: if ($file=~m:^/~:) { # is a contruction space reference
7025: $location = $file;
7026: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
7027: } elsif ($file=~m:^/home/[^/]*/public_html/:) {
7028: # is a correct contruction space reference
7029: $location = $file;
7030: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
7031: my ($udom,$uname,$filename)=
7032: ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
7033: my $home=&homeserver($uname,$udom);
7034: my $is_me=0;
7035: my @ids=¤t_machine_ids();
7036: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
7037: if ($is_me) {
7038: $location=&propath($udom,$uname).
7039: '/userfiles/'.$filename;
7040: } else {
7041: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
7042: $udom.'/'.$uname.'/'.$filename;
7043: }
7044: } else {
7045: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7046: $file=~s:^/res/:/:;
7047: if ( !( $file =~ m:^/:) ) {
7048: $location = $dir. '/'.$file;
7049: } else {
7050: $location = '/home/httpd/html/res'.$file;
7051: }
7052: }
7053: $location=~s://+:/:g; # remove duplicate /
7054: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
7055: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
7056: return $location;
7057: }
7058:
7059: sub hreflocation {
7060: my ($dir,$file)=@_;
7061: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
7062: $file=filelocation($dir,$file);
7063: } elsif ($file=~m-^/adm/-) {
7064: $file=~s-^/adm/wrapper/-/-;
7065: $file=~s-^/adm/coursedocs/showdoc/-/-;
7066: }
7067: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
7068: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
7069: } elsif ($file=~m-/home/(\w+)/public_html/-) {
7070: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
7071: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
7072: $file=~s-^/home/httpd/lonUsers/([^/]*)/./././([^/]*)/userfiles/
7073: -/uploaded/$1/$2/-x;
7074: }
7075: return $file;
7076: }
7077:
7078: sub current_machine_domains {
7079: my $hostname=$hostname{$perlvar{'lonHostID'}};
7080: my @domains;
7081: while( my($id, $name) = each(%hostname)) {
7082: # &logthis("-$id-$name-$hostname-");
7083: if ($hostname eq $name) {
7084: push(@domains,$hostdom{$id});
7085: }
7086: }
7087: return @domains;
7088: }
7089:
7090: sub current_machine_ids {
7091: my $hostname=$hostname{$perlvar{'lonHostID'}};
7092: my @ids;
7093: while( my($id, $name) = each(%hostname)) {
7094: # &logthis("-$id-$name-$hostname-");
7095: if ($hostname eq $name) {
7096: push(@ids,$id);
7097: }
7098: }
7099: return @ids;
7100: }
7101:
7102: # ------------------------------------------------------------- Declutters URLs
7103:
7104: sub declutter {
7105: my $thisfn=shift;
7106: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
7107: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7108: $thisfn=~s/^\///;
7109: $thisfn=~s|^adm/wrapper/||;
7110: $thisfn=~s|^adm/coursedocs/showdoc/||;
7111: $thisfn=~s/^res\///;
7112: $thisfn=~s/\?.+$//;
7113: return $thisfn;
7114: }
7115:
7116: # ------------------------------------------------------------- Clutter up URLs
7117:
7118: sub clutter {
7119: my $thisfn='/'.&declutter(shift);
7120: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
7121: $thisfn='/res'.$thisfn;
7122: }
7123: if ($thisfn !~m|/adm|) {
7124: if ($thisfn =~ m|/ext/|) {
7125: $thisfn='/adm/wrapper'.$thisfn;
7126: } else {
7127: my ($ext) = ($thisfn =~ /\.(\w+)$/);
7128: my $embstyle=&Apache::loncommon::fileembstyle($ext);
7129: if ($embstyle eq 'ssi'
7130: || ($embstyle eq 'hdn')
7131: || ($embstyle eq 'rat')
7132: || ($embstyle eq 'prv')
7133: || ($embstyle eq 'ign')) {
7134: #do nothing with these
7135: } elsif (($embstyle eq 'img')
7136: || ($embstyle eq 'emb')
7137: || ($embstyle eq 'wrp')) {
7138: $thisfn='/adm/wrapper'.$thisfn;
7139: } elsif ($embstyle eq 'unk'
7140: && $thisfn!~/\.(sequence|page)$/) {
7141: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
7142: } else {
7143: # &logthis("Got a blank emb style");
7144: }
7145: }
7146: }
7147: return $thisfn;
7148: }
7149:
7150: sub clutter_with_no_wrapper {
7151: my $uri = &clutter(shift);
7152: if ($uri =~ m-^/adm/-) {
7153: $uri =~ s-^/adm/wrapper/-/-;
7154: $uri =~ s-^/adm/coursedocs/showdoc/-/-;
7155: }
7156: return $uri;
7157: }
7158:
7159: sub freeze_escape {
7160: my ($value)=@_;
7161: if (ref($value)) {
7162: $value=&nfreeze($value);
7163: return '__FROZEN__'.&escape($value);
7164: }
7165: return &escape($value);
7166: }
7167:
7168:
7169: sub thaw_unescape {
7170: my ($value)=@_;
7171: if ($value =~ /^__FROZEN__/) {
7172: substr($value,0,10,undef);
7173: $value=&unescape($value);
7174: return &thaw($value);
7175: }
7176: return &unescape($value);
7177: }
7178:
7179: sub correct_line_ends {
7180: my ($result)=@_;
7181: $$result =~s/\r\n/\n/mg;
7182: $$result =~s/\r/\n/mg;
7183: }
7184: # ================================================================ Main Program
7185:
7186: sub goodbye {
7187: &logthis("Starting Shut down");
7188: #not converted to using infrastruture and probably shouldn't be
7189: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
7190: #converted
7191: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
7192: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
7193: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
7194: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
7195: #1.1 only
7196: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
7197: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
7198: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
7199: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
7200: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
7201: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
7202: &logthis(sprintf("%-20s is %s",'hits',$hits));
7203: &flushcourselogs();
7204: &logthis("Shutting down");
7205: }
7206:
7207: BEGIN {
7208: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
7209: unless ($readit) {
7210: {
7211: my $configvars = LONCAPA::Configuration::read_conf('loncapa.conf');
7212: %perlvar = (%perlvar,%{$configvars});
7213: }
7214:
7215: # ------------------------------------------------------------ Read domain file
7216: {
7217: %domaindescription = ();
7218: %domain_auth_def = ();
7219: %domain_auth_arg_def = ();
7220: my $fh;
7221: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
7222: while (<$fh>) {
7223: next if (/^(\#|\s*$)/);
7224: # next if /^\#/;
7225: chomp;
7226: my ($domain, $domain_description, $def_auth, $def_auth_arg,
7227: $def_lang, $city, $longi, $lati, $primary) = split(/:/,$_);
7228: $domain_auth_def{$domain}=$def_auth;
7229: $domain_auth_arg_def{$domain}=$def_auth_arg;
7230: $domaindescription{$domain}=$domain_description;
7231: $domain_lang_def{$domain}=$def_lang;
7232: $domain_city{$domain}=$city;
7233: $domain_longi{$domain}=$longi;
7234: $domain_lati{$domain}=$lati;
7235: $domain_primary{$domain}=$primary;
7236:
7237: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
7238: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
7239: }
7240: }
7241: close ($fh);
7242: }
7243:
7244:
7245: # ------------------------------------------------------------- Read hosts file
7246: {
7247: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
7248:
7249: while (my $configline=<$config>) {
7250: next if ($configline =~ /^(\#|\s*$)/);
7251: chomp($configline);
7252: my ($id,$domain,$role,$name)=split(/:/,$configline);
7253: $name=~s/\s//g;
7254: if ($id && $domain && $role && $name) {
7255: $hostname{$id}=$name;
7256: $hostdom{$id}=$domain;
7257: if ($role eq 'library') { $libserv{$id}=$name; }
7258: }
7259: }
7260: close($config);
7261: # FIXME: dev server don't want this, production servers _do_ want this
7262: #&get_iphost();
7263: }
7264:
7265: sub get_iphost {
7266: if (%iphost) { return %iphost; }
7267: my %name_to_ip;
7268: foreach my $id (keys(%hostname)) {
7269: my $name=$hostname{$id};
7270: my $ip;
7271: if (!exists($name_to_ip{$name})) {
7272: $ip = gethostbyname($name);
7273: if (!$ip || length($ip) ne 4) {
7274: &logthis("Skipping host $id name $name no IP found\n");
7275: next;
7276: }
7277: $ip=inet_ntoa($ip);
7278: $name_to_ip{$name} = $ip;
7279: } else {
7280: $ip = $name_to_ip{$name};
7281: }
7282: push(@{$iphost{$ip}},$id);
7283: }
7284: return %iphost;
7285: }
7286:
7287: # ------------------------------------------------------ Read spare server file
7288: {
7289: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
7290:
7291: while (my $configline=<$config>) {
7292: chomp($configline);
7293: if ($configline) {
7294: my ($host,$type) = split(':',$configline,2);
7295: if (!defined($type) || $type eq '') { $type = 'default' };
7296: push(@{ $spareid{$type} }, $host);
7297: }
7298: }
7299: close($config);
7300: }
7301: # ------------------------------------------------------------ Read permissions
7302: {
7303: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
7304:
7305: while (my $configline=<$config>) {
7306: chomp($configline);
7307: if ($configline) {
7308: my ($role,$perm)=split(/ /,$configline);
7309: if ($perm ne '') { $pr{$role}=$perm; }
7310: }
7311: }
7312: close($config);
7313: }
7314:
7315: # -------------------------------------------- Read plain texts for permissions
7316: {
7317: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
7318:
7319: while (my $configline=<$config>) {
7320: chomp($configline);
7321: if ($configline) {
7322: my ($short,@plain)=split(/:/,$configline);
7323: %{$prp{$short}} = ();
7324: if (@plain > 0) {
7325: $prp{$short}{'std'} = $plain[0];
7326: for (my $i=1; $i<@plain; $i++) {
7327: $prp{$short}{'alt'.$i} = $plain[$i];
7328: }
7329: }
7330: }
7331: }
7332: close($config);
7333: }
7334:
7335: # ---------------------------------------------------------- Read package table
7336: {
7337: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
7338:
7339: while (my $configline=<$config>) {
7340: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
7341: chomp($configline);
7342: my ($short,$plain)=split(/:/,$configline);
7343: my ($pack,$name)=split(/\&/,$short);
7344: if ($plain ne '') {
7345: $packagetab{$pack.'&'.$name.'&name'}=$name;
7346: $packagetab{$short}=$plain;
7347: }
7348: }
7349: close($config);
7350: }
7351:
7352: # ------------- set up temporary directory
7353: {
7354: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
7355:
7356: }
7357:
7358: $memcache=new Cache::Memcached({'servers' => ['127.0.0.1:11211'],
7359: 'compress_threshold'=> 20_000,
7360: });
7361:
7362: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
7363: $dumpcount=0;
7364:
7365: &logtouch();
7366: &logthis('<font color="yellow">INFO: Read configuration</font>');
7367: $readit=1;
7368: {
7369: use integer;
7370: my $test=(2**32)+1;
7371: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
7372: &logthis(" Detected 64bit platform ($_64bit)");
7373: }
7374: }
7375: }
7376:
7377: 1;
7378: __END__
7379:
7380: =pod
7381:
7382: =head1 NAME
7383:
7384: Apache::lonnet - Subroutines to ask questions about things in the network.
7385:
7386: =head1 SYNOPSIS
7387:
7388: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
7389:
7390: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
7391:
7392: Common parameters:
7393:
7394: =over 4
7395:
7396: =item *
7397:
7398: $uname : an internal username (if $cname expecting a course Id specifically)
7399:
7400: =item *
7401:
7402: $udom : a domain (if $cdom expecting a course's domain specifically)
7403:
7404: =item *
7405:
7406: $symb : a resource instance identifier
7407:
7408: =item *
7409:
7410: $namespace : the name of a .db file that contains the data needed or
7411: being set.
7412:
7413: =back
7414:
7415: =head1 OVERVIEW
7416:
7417: lonnet provides subroutines which interact with the
7418: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
7419: about classes, users, and resources.
7420:
7421: For many of these objects you can also use this to store data about
7422: them or modify them in various ways.
7423:
7424: =head2 Symbs
7425:
7426: To identify a specific instance of a resource, LON-CAPA uses symbols
7427: or "symbs"X<symb>. These identifiers are built from the URL of the
7428: map, the resource number of the resource in the map, and the URL of
7429: the resource itself. The latter is somewhat redundant, but might help
7430: if maps change.
7431:
7432: An example is
7433:
7434: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
7435:
7436: The respective map entry is
7437:
7438: <resource id="19" src="/res/msu/korte/tests/part12.problem"
7439: title="Problem 2">
7440: </resource>
7441:
7442: Symbs are used by the random number generator, as well as to store and
7443: restore data specific to a certain instance of for example a problem.
7444:
7445: =head2 Storing And Retrieving Data
7446:
7447: X<store()>X<cstore()>X<restore()>Three of the most important functions
7448: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
7449: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
7450: is is the non-critical message twin of cstore. These functions are for
7451: handlers to store a perl hash to a user's permanent data space in an
7452: easy manner, and to retrieve it again on another call. It is expected
7453: that a handler would use this once at the beginning to retrieve data,
7454: and then again once at the end to send only the new data back.
7455:
7456: The data is stored in the user's data directory on the user's
7457: homeserver under the ID of the course.
7458:
7459: The hash that is returned by restore will have all of the previous
7460: value for all of the elements of the hash.
7461:
7462: Example:
7463:
7464: #creating a hash
7465: my %hash;
7466: $hash{'foo'}='bar';
7467:
7468: #storing it
7469: &Apache::lonnet::cstore(\%hash);
7470:
7471: #changing a value
7472: $hash{'foo'}='notbar';
7473:
7474: #adding a new value
7475: $hash{'bar'}='foo';
7476: &Apache::lonnet::cstore(\%hash);
7477:
7478: #retrieving the hash
7479: my %history=&Apache::lonnet::restore();
7480:
7481: #print the hash
7482: foreach my $key (sort(keys(%history))) {
7483: print("\%history{$key} = $history{$key}");
7484: }
7485:
7486: Will print out:
7487:
7488: %history{1:foo} = bar
7489: %history{1:keys} = foo:timestamp
7490: %history{1:timestamp} = 990455579
7491: %history{2:bar} = foo
7492: %history{2:foo} = notbar
7493: %history{2:keys} = foo:bar:timestamp
7494: %history{2:timestamp} = 990455580
7495: %history{bar} = foo
7496: %history{foo} = notbar
7497: %history{timestamp} = 990455580
7498: %history{version} = 2
7499:
7500: Note that the special hash entries C<keys>, C<version> and
7501: C<timestamp> were added to the hash. C<version> will be equal to the
7502: total number of versions of the data that have been stored. The
7503: C<timestamp> attribute will be the UNIX time the hash was
7504: stored. C<keys> is available in every historical section to list which
7505: keys were added or changed at a specific historical revision of a
7506: hash.
7507:
7508: B<Warning>: do not store the hash that restore returns directly. This
7509: will cause a mess since it will restore the historical keys as if the
7510: were new keys. I.E. 1:foo will become 1:1:foo etc.
7511:
7512: Calling convention:
7513:
7514: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
7515: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
7516:
7517: For more detailed information, see lonnet specific documentation.
7518:
7519: =head1 RETURN MESSAGES
7520:
7521: =over 4
7522:
7523: =item * B<con_lost>: unable to contact remote host
7524:
7525: =item * B<con_delayed>: unable to contact remote host, message will be delivered
7526: when the connection is brought back up
7527:
7528: =item * B<con_failed>: unable to contact remote host and unable to save message
7529: for later delivery
7530:
7531: =item * B<error:>: an error a occured, a description of the error follows the :
7532:
7533: =item * B<no_such_host>: unable to fund a host associated with the user/domain
7534: that was requested
7535:
7536: =back
7537:
7538: =head1 PUBLIC SUBROUTINES
7539:
7540: =head2 Session Environment Functions
7541:
7542: =over 4
7543:
7544: =item *
7545: X<appenv()>
7546: B<appenv(%hash)>: the value of %hash is written to
7547: the user envirnoment file, and will be restored for each access this
7548: user makes during this session, also modifies the %env for the current
7549: process
7550:
7551: =item *
7552: X<delenv()>
7553: B<delenv($regexp)>: removes all items from the session
7554: environment file that matches the regular expression in $regexp. The
7555: values are also delted from the current processes %env.
7556:
7557: =back
7558:
7559: =head2 User Information
7560:
7561: =over 4
7562:
7563: =item *
7564: X<queryauthenticate()>
7565: B<queryauthenticate($uname,$udom)>: try to determine user's current
7566: authentication scheme
7567:
7568: =item *
7569: X<authenticate()>
7570: B<authenticate($uname,$upass,$udom)>: try to
7571: authenticate user from domain's lib servers (first use the current
7572: one). C<$upass> should be the users password.
7573:
7574: =item *
7575: X<homeserver()>
7576: B<homeserver($uname,$udom)>: find the server which has
7577: the user's directory and files (there must be only one), this caches
7578: the answer, and also caches if there is a borken connection.
7579:
7580: =item *
7581: X<idget()>
7582: B<idget($udom,@ids)>: find the usernames behind a list of IDs
7583: (IDs are a unique resource in a domain, there must be only 1 ID per
7584: username, and only 1 username per ID in a specific domain) (returns
7585: hash: id=>name,id=>name)
7586:
7587: =item *
7588: X<idrget()>
7589: B<idrget($udom,@unames)>: find the IDs behind a list of
7590: usernames (returns hash: name=>id,name=>id)
7591:
7592: =item *
7593: X<idput()>
7594: B<idput($udom,%ids)>: store away a list of names and associated IDs
7595:
7596: =item *
7597: X<rolesinit()>
7598: B<rolesinit($udom,$username,$authhost)>: get user privileges
7599:
7600: =item *
7601: X<getsection()>
7602: B<getsection($udom,$uname,$cname)>: finds the section of student in the
7603: course $cname, return section name/number or '' for "not in course"
7604: and '-1' for "no section"
7605:
7606: =item *
7607: X<userenvironment()>
7608: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
7609: passed in @what from the requested user's environment, returns a hash
7610:
7611: =back
7612:
7613: =head2 User Roles
7614:
7615: =over 4
7616:
7617: =item *
7618:
7619: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
7620: actions
7621: F: full access
7622: U,I,K: authentication modes (cxx only)
7623: '': forbidden
7624: 1: user needs to choose course
7625: 2: browse allowed
7626: A: passphrase authentication needed
7627:
7628: =item *
7629:
7630: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
7631: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
7632: and course level
7633:
7634: =item *
7635:
7636: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
7637: explanation of a user role term
7638:
7639: =back
7640:
7641: =head2 User Modification
7642:
7643: =over 4
7644:
7645: =item *
7646:
7647: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
7648: user for the level given by URL. Optional start and end dates (leave empty
7649: string or zero for "no date")
7650:
7651: =item *
7652:
7653: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
7654: change a users, password, possible return values are: ok,
7655: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
7656: refused
7657:
7658: =item *
7659:
7660: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
7661:
7662: =item *
7663:
7664: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
7665: modify user
7666:
7667: =item *
7668:
7669: modifystudent
7670:
7671: modify a students enrollment and identification information.
7672: The course id is resolved based on the current users environment.
7673: This means the envoking user must be a course coordinator or otherwise
7674: associated with a course.
7675:
7676: This call is essentially a wrapper for lonnet::modifyuser and
7677: lonnet::modify_student_enrollment
7678:
7679: Inputs:
7680:
7681: =over 4
7682:
7683: =item B<$udom> Students loncapa domain
7684:
7685: =item B<$uname> Students loncapa login name
7686:
7687: =item B<$uid> Students id/student number
7688:
7689: =item B<$umode> Students authentication mode
7690:
7691: =item B<$upass> Students password
7692:
7693: =item B<$first> Students first name
7694:
7695: =item B<$middle> Students middle name
7696:
7697: =item B<$last> Students last name
7698:
7699: =item B<$gene> Students generation
7700:
7701: =item B<$usec> Students section in course
7702:
7703: =item B<$end> Unix time of the roles expiration
7704:
7705: =item B<$start> Unix time of the roles start date
7706:
7707: =item B<$forceid> If defined, allow $uid to be changed
7708:
7709: =item B<$desiredhome> server to use as home server for student
7710:
7711: =back
7712:
7713: =item *
7714:
7715: modify_student_enrollment
7716:
7717: Change a students enrollment status in a class. The environment variable
7718: 'role.request.course' must be defined for this function to proceed.
7719:
7720: Inputs:
7721:
7722: =over 4
7723:
7724: =item $udom, students domain
7725:
7726: =item $uname, students name
7727:
7728: =item $uid, students user id
7729:
7730: =item $first, students first name
7731:
7732: =item $middle
7733:
7734: =item $last
7735:
7736: =item $gene
7737:
7738: =item $usec
7739:
7740: =item $end
7741:
7742: =item $start
7743:
7744: =back
7745:
7746:
7747: =item *
7748:
7749: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
7750: custom role; give a custom role to a user for the level given by URL. Specify
7751: name and domain of role author, and role name
7752:
7753: =item *
7754:
7755: revokerole($udom,$uname,$url,$role) : revoke a role for url
7756:
7757: =item *
7758:
7759: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
7760:
7761: =back
7762:
7763: =head2 Course Infomation
7764:
7765: =over 4
7766:
7767: =item *
7768:
7769: coursedescription($courseid) : returns a hash of information about the
7770: specified course id, including all environment settings for the
7771: course, the description of the course will be in the hash under the
7772: key 'description'
7773:
7774: =item *
7775:
7776: resdata($name,$domain,$type,@which) : request for current parameter
7777: setting for a specific $type, where $type is either 'course' or 'user',
7778: @what should be a list of parameters to ask about. This routine caches
7779: answers for 5 minutes.
7780:
7781: =back
7782:
7783: =head2 Course Modification
7784:
7785: =over 4
7786:
7787: =item *
7788:
7789: writecoursepref($courseid,%prefs) : write preferences (environment
7790: database) for a course
7791:
7792: =item *
7793:
7794: createcourse($udom,$description,$url) : make/modify course
7795:
7796: =back
7797:
7798: =head2 Resource Subroutines
7799:
7800: =over 4
7801:
7802: =item *
7803:
7804: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
7805:
7806: =item *
7807:
7808: repcopy($filename) : subscribes to the requested file, and attempts to
7809: replicate from the owning library server, Might return
7810: 'unavailable', 'not_found', 'forbidden', 'ok', or
7811: 'bad_request', also attempts to grab the metadata for the
7812: resource. Expects the local filesystem pathname
7813: (/home/httpd/html/res/....)
7814:
7815: =back
7816:
7817: =head2 Resource Information
7818:
7819: =over 4
7820:
7821: =item *
7822:
7823: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
7824: a vairety of different possible values, $varname should be a request
7825: string, and the other parameters can be used to specify who and what
7826: one is asking about.
7827:
7828: Possible values for $varname are environment.lastname (or other item
7829: from the envirnment hash), user.name (or someother aspect about the
7830: user), resource.0.maxtries (or some other part and parameter of a
7831: resource)
7832:
7833: =item *
7834:
7835: directcondval($number) : get current value of a condition; reads from a state
7836: string
7837:
7838: =item *
7839:
7840: condval($condidx) : value of condition index based on state
7841:
7842: =item *
7843:
7844: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
7845: resource's metadata, $what should be either a specific key, or either
7846: 'keys' (to get a list of possible keys) or 'packages' to get a list of
7847: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
7848:
7849: this function automatically caches all requests
7850:
7851: =item *
7852:
7853: metadata_query($query,$custom,$customshow) : make a metadata query against the
7854: network of library servers; returns file handle of where SQL and regex results
7855: will be stored for query
7856:
7857: =item *
7858:
7859: symbread($filename) : return symbolic list entry (filename argument optional);
7860: returns the data handle
7861:
7862: =item *
7863:
7864: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
7865: a possible symb for the URL in $thisfn, and if is an encryypted
7866: resource that the user accessed using /enc/ returns a 1 on success, 0
7867: on failure, user must be in a course, as it assumes the existance of
7868: the course initial hash, and uses $env('request.course.id'}
7869:
7870:
7871: =item *
7872:
7873: symbclean($symb) : removes versions numbers from a symb, returns the
7874: cleaned symb
7875:
7876: =item *
7877:
7878: is_on_map($uri) : checks if the $uri is somewhere on the current
7879: course map, user must be in a course for it to work.
7880:
7881: =item *
7882:
7883: numval($salt) : return random seed value (addend for rndseed)
7884:
7885: =item *
7886:
7887: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
7888: a random seed, all arguments are optional, if they aren't sent it uses the
7889: environment to derive them. Note: if symb isn't sent and it can't get one
7890: from &symbread it will use the current time as its return value
7891:
7892: =item *
7893:
7894: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
7895: unfakeable, receipt
7896:
7897: =item *
7898:
7899: receipt() : API to ireceipt working off of env values; given out to users
7900:
7901: =item *
7902:
7903: countacc($url) : count the number of accesses to a given URL
7904:
7905: =item *
7906:
7907: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
7908:
7909: =item *
7910:
7911: checkin($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 $tcrsid)
7912:
7913: =item *
7914:
7915: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
7916:
7917: =item *
7918:
7919: devalidate($symb) : devalidate temporary spreadsheet calculations,
7920: forcing spreadsheet to reevaluate the resource scores next time.
7921:
7922: =back
7923:
7924: =head2 Storing/Retreiving Data
7925:
7926: =over 4
7927:
7928: =item *
7929:
7930: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
7931: for this url; hashref needs to be given and should be a \%hashname; the
7932: remaining args aren't required and if they aren't passed or are '' they will
7933: be derived from the env
7934:
7935: =item *
7936:
7937: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
7938: uses critical subroutine
7939:
7940: =item *
7941:
7942: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
7943: all args are optional
7944:
7945: =item *
7946:
7947: dumpstore($namespace,$udom,$uname,$regexp,$range) :
7948: dumps the complete (or key matching regexp) namespace into a hash
7949: ($udom, $uname, $regexp, $range are optional) for a namespace that is
7950: normally &store()ed into
7951:
7952: $range should be either an integer '100' (give me the first 100
7953: matching records)
7954: or be two integers sperated by a - with no spaces
7955: '30-50' (give me the 30th through the 50th matching
7956: records)
7957:
7958:
7959: =item *
7960:
7961: putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
7962: replaces a &store() version of data with a replacement set of data
7963: for a particular resource in a namespace passed in the $storehash hash
7964: reference
7965:
7966: =item *
7967:
7968: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
7969: works very similar to store/cstore, but all data is stored in a
7970: temporary location and can be reset using tmpreset, $storehash should
7971: be a hash reference, returns nothing on success
7972:
7973: =item *
7974:
7975: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
7976: similar to restore, but all data is stored in a temporary location and
7977: can be reset using tmpreset. Returns a hash of values on success,
7978: error string otherwise.
7979:
7980: =item *
7981:
7982: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
7983: deltes all keys for $symb form the temporary storage hash.
7984:
7985: =item *
7986:
7987: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7988: reference filled in from namesp ($udom and $uname are optional)
7989:
7990: =item *
7991:
7992: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
7993: namesp ($udom and $uname are optional)
7994:
7995: =item *
7996:
7997: dump($namespace,$udom,$uname,$regexp,$range) :
7998: dumps the complete (or key matching regexp) namespace into a hash
7999: ($udom, $uname, $regexp, $range are optional)
8000:
8001: $range should be either an integer '100' (give me the first 100
8002: matching records)
8003: or be two integers sperated by a - with no spaces
8004: '30-50' (give me the 30th through the 50th matching
8005: records)
8006: =item *
8007:
8008: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
8009: $store can be a scalar, an array reference, or if the amount to be
8010: incremented is > 1, a hash reference.
8011:
8012: ($udom and $uname are optional)
8013:
8014: =item *
8015:
8016: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
8017: ($udom and $uname are optional)
8018:
8019: =item *
8020:
8021: cput($namespace,$storehash,$udom,$uname) : critical put
8022: ($udom and $uname are optional)
8023:
8024: =item *
8025:
8026: newput($namespace,$storehash,$udom,$uname) :
8027:
8028: Attempts to store the items in the $storehash, but only if they don't
8029: currently exist, if this succeeds you can be certain that you have
8030: successfully created a new key value pair in the $namespace db.
8031:
8032:
8033: Args:
8034: $namespace: name of database to store values to
8035: $storehash: hashref to store to the db
8036: $udom: (optional) domain of user containing the db
8037: $uname: (optional) name of user caontaining the db
8038:
8039: Returns:
8040: 'ok' -> succeeded in storing all keys of $storehash
8041: 'key_exists: <key>' -> failed to anything out of $storehash, as at
8042: least <key> already existed in the db (other
8043: requested keys may also already exist)
8044: 'error: <msg>' -> unable to tie the DB or other erorr occured
8045: 'con_lost' -> unable to contact request server
8046: 'refused' -> action was not allowed by remote machine
8047:
8048:
8049: =item *
8050:
8051: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
8052: reference filled in from namesp (encrypts the return communication)
8053: ($udom and $uname are optional)
8054:
8055: =item *
8056:
8057: log($udom,$name,$home,$message) : write to permanent log for user; use
8058: critical subroutine
8059:
8060: =back
8061:
8062: =head2 Network Status Functions
8063:
8064: =over 4
8065:
8066: =item *
8067:
8068: dirlist($uri) : return directory list based on URI
8069:
8070: =item *
8071:
8072: spareserver() : find server with least workload from spare.tab
8073:
8074: =back
8075:
8076: =head2 Apache Request
8077:
8078: =over 4
8079:
8080: =item *
8081:
8082: ssi($url,%hash) : server side include, does a complete request cycle on url to
8083: localhost, posts hash
8084:
8085: =back
8086:
8087: =head2 Data to String to Data
8088:
8089: =over 4
8090:
8091: =item *
8092:
8093: hash2str(%hash) : convert a hash into a string complete with escaping and '='
8094: and '&' separators, supports elements that are arrayrefs and hashrefs
8095:
8096: =item *
8097:
8098: hashref2str($hashref) : convert a hashref into a string complete with
8099: escaping and '=' and '&' separators, supports elements that are
8100: arrayrefs and hashrefs
8101:
8102: =item *
8103:
8104: arrayref2str($arrayref) : convert an arrayref into a string complete
8105: with escaping and '&' separators, supports elements that are arrayrefs
8106: and hashrefs
8107:
8108: =item *
8109:
8110: str2hash($string) : convert string to hash using unescaping and
8111: splitting on '=' and '&', supports elements that are arrayrefs and
8112: hashrefs
8113:
8114: =item *
8115:
8116: str2array($string) : convert string to hash using unescaping and
8117: splitting on '&', supports elements that are arrayrefs and hashrefs
8118:
8119: =back
8120:
8121: =head2 Logging Routines
8122:
8123: =over 4
8124:
8125: These routines allow one to make log messages in the lonnet.log and
8126: lonnet.perm logfiles.
8127:
8128: =item *
8129:
8130: logtouch() : make sure the logfile, lonnet.log, exists
8131:
8132: =item *
8133:
8134: logthis() : append message to the normal lonnet.log file, it gets
8135: preiodically rolled over and deleted.
8136:
8137: =item *
8138:
8139: logperm() : append a permanent message to lonnet.perm.log, this log
8140: file never gets deleted by any automated portion of the system, only
8141: messages of critical importance should go in here.
8142:
8143: =back
8144:
8145: =head2 General File Helper Routines
8146:
8147: =over 4
8148:
8149: =item *
8150:
8151: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
8152: (a) files in /uploaded
8153: (i) If a local copy of the file exists -
8154: compares modification date of local copy with last-modified date for
8155: definitive version stored on home server for course. If local copy is
8156: stale, requests a new version from the home server and stores it.
8157: If the original has been removed from the home server, then local copy
8158: is unlinked.
8159: (ii) If local copy does not exist -
8160: requests the file from the home server and stores it.
8161:
8162: If $caller is 'uploadrep':
8163: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
8164: for request for files originally uploaded via DOCS.
8165: - returns 'ok' if fresh local copy now available, -1 otherwise.
8166:
8167: Otherwise:
8168: This indicates a call from the content generation phase of the request.
8169: - returns the entire contents of the file or -1.
8170:
8171: (b) files in /res
8172: - returns the entire contents of a file or -1;
8173: it properly subscribes to and replicates the file if neccessary.
8174:
8175:
8176: =item *
8177:
8178: stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
8179: reference
8180:
8181: returns either a stat() list of data about the file or an empty list
8182: if the file doesn't exist or couldn't find out about it (connection
8183: problems or user unknown)
8184:
8185: =item *
8186:
8187: filelocation($dir,$file) : returns file system location of a file
8188: based on URI; meant to be "fairly clean" absolute reference, $dir is a
8189: directory that relative $file lookups are to looked in ($dir of /a/dir
8190: and a file of ../bob will become /a/bob)
8191:
8192: =item *
8193:
8194: hreflocation($dir,$file) : returns file system location or a URL; same as
8195: filelocation except for hrefs
8196:
8197: =item *
8198:
8199: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
8200:
8201: =back
8202:
8203: =head2 Usererfile file routines (/uploaded*)
8204:
8205: =over 4
8206:
8207: =item *
8208:
8209: userfileupload(): main rotine for putting a file in a user or course's
8210: filespace, arguments are,
8211:
8212: formname - required - this is the name of the element in $env where the
8213: filename, and the contents of the file to create/modifed exist
8214: the filename is in $env{'form.'.$formname.'.filename'} and the
8215: contents of the file is located in $env{'form.'.$formname}
8216: coursedoc - if true, store the file in the course of the active role
8217: of the current user
8218: subdir - required - subdirectory to put the file in under ../userfiles/
8219: if undefined, it will be placed in "unknown"
8220:
8221: (This routine calls clean_filename() to remove any dangerous
8222: characters from the filename, and then calls finuserfileupload() to
8223: complete the transaction)
8224:
8225: returns either the url of the uploaded file (/uploaded/....) if successful
8226: and /adm/notfound.html if unsuccessful
8227:
8228: =item *
8229:
8230: clean_filename(): routine for cleaing a filename up for storage in
8231: userfile space, argument is:
8232:
8233: filename - proposed filename
8234:
8235: returns: the new clean filename
8236:
8237: =item *
8238:
8239: finishuserfileupload(): routine that creaes and sends the file to
8240: userspace, probably shouldn't be called directly
8241:
8242: docuname: username or courseid of destination for the file
8243: docudom: domain of user/course of destination for the file
8244: formname: same as for userfileupload()
8245: fname: filename (inculding subdirectories) for the file
8246:
8247: returns either the url of the uploaded file (/uploaded/....) if successful
8248: and /adm/notfound.html if unsuccessful
8249:
8250: =item *
8251:
8252: renameuserfile(): renames an existing userfile to a new name
8253:
8254: Args:
8255: docuname: username or courseid of destination for the file
8256: docudom: domain of user/course of destination for the file
8257: old: current file name (including any subdirs under userfiles)
8258: new: desired file name (including any subdirs under userfiles)
8259:
8260: =item *
8261:
8262: mkdiruserfile(): creates a directory is a userfiles dir
8263:
8264: Args:
8265: docuname: username or courseid of destination for the file
8266: docudom: domain of user/course of destination for the file
8267: dir: dir to create (including any subdirs under userfiles)
8268:
8269: =item *
8270:
8271: removeuserfile(): removes a file that exists in userfiles
8272:
8273: Args:
8274: docuname: username or courseid of destination for the file
8275: docudom: domain of user/course of destination for the file
8276: fname: filname to delete (including any subdirs under userfiles)
8277:
8278: =item *
8279:
8280: removeuploadedurl(): convience function for removeuserfile()
8281:
8282: Args:
8283: url: a full /uploaded/... url to delete
8284:
8285: =item *
8286:
8287: get_portfile_permissions():
8288: Args:
8289: domain: domain of user or course contain the portfolio files
8290: user: name of user or num of course contain the portfolio files
8291: Returns:
8292: hashref of a dump of the proper file_permissions.db
8293:
8294:
8295: =item *
8296:
8297: get_access_controls():
8298:
8299: Args:
8300: current_permissions: the hash ref returned from get_portfile_permissions()
8301: group: (optional) the group you want the files associated with
8302: file: (optional) the file you want access info on
8303:
8304: Returns:
8305: a hash (keys are file names) of hashes containing
8306: keys are: path to file/file_name\0uniqueID:scope_end_start (see below)
8307: values are XML containing access control settings (see below)
8308:
8309: Internal notes:
8310:
8311: access controls are stored in file_permissions.db as key=value pairs.
8312: key -> path to file/file_name\0uniqueID:scope_end_start
8313: where scope -> public,guest,course,group,domains or users.
8314: end -> UNIX time for end of access (0 -> no end date)
8315: start -> UNIX time for start of access
8316:
8317: value -> XML description of access control
8318: <scope type=""> (type =1 of: public,guest,course,group,domains,users">
8319: <start></start>
8320: <end></end>
8321:
8322: <password></password> for scope type = guest
8323:
8324: <domain></domain> for scope type = course or group
8325: <number></number>
8326: <roles id="">
8327: <role></role>
8328: <access></access>
8329: <section></section>
8330: <group></group>
8331: </roles>
8332:
8333: <dom></dom> for scope type = domains
8334:
8335: <users> for scope type = users
8336: <user>
8337: <uname></uname>
8338: <udom></udom>
8339: </user>
8340: </users>
8341: </scope>
8342:
8343: Access data is also aggregated for each file in an additional key=value pair:
8344: key -> path to file/file_name\0accesscontrol
8345: value -> reference to hash
8346: hash contains key = value pairs
8347: where key = uniqueID:scope_end_start
8348: value = UNIX time record was last updated
8349:
8350: Used to improve speed of look-ups of access controls for each file.
8351:
8352: Locks on files (resulting from submission of portfolio file to a homework problem stored in array of arrays.
8353:
8354: modify_access_controls():
8355:
8356: Modifies access controls for a portfolio file
8357: Args
8358: 1. file name
8359: 2. reference to hash of required changes,
8360: 3. domain
8361: 4. username
8362: where domain,username are the domain of the portfolio owner
8363: (either a user or a course)
8364:
8365: Returns:
8366: 1. result of additions or updates ('ok' or 'error', with error message).
8367: 2. result of deletions ('ok' or 'error', with error message).
8368: 3. reference to hash of any new or updated access controls.
8369: 4. reference to hash used to map incoming IDs to uniqueIDs assigned to control.
8370: key = integer (inbound ID)
8371: value = uniqueID
8372:
8373: =back
8374:
8375: =head2 HTTP Helper Routines
8376:
8377: =over 4
8378:
8379: =item *
8380:
8381: escape() : unpack non-word characters into CGI-compatible hex codes
8382:
8383: =item *
8384:
8385: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
8386:
8387: =back
8388:
8389: =head1 PRIVATE SUBROUTINES
8390:
8391: =head2 Underlying communication routines (Shouldn't call)
8392:
8393: =over 4
8394:
8395: =item *
8396:
8397: subreply() : tries to pass a message to lonc, returns con_lost if incapable
8398:
8399: =item *
8400:
8401: reply() : uses subreply to send a message to remote machine, logs all failures
8402:
8403: =item *
8404:
8405: critical() : passes a critical message to another server; if cannot
8406: get through then place message in connection buffer directory and
8407: returns con_delayed, if incapable of saving message, returns
8408: con_failed
8409:
8410: =item *
8411:
8412: reconlonc() : tries to reconnect lonc client processes.
8413:
8414: =back
8415:
8416: =head2 Resource Access Logging
8417:
8418: =over 4
8419:
8420: =item *
8421:
8422: flushcourselogs() : flush (save) buffer logs and access logs
8423:
8424: =item *
8425:
8426: courselog($what) : save message for course in hash
8427:
8428: =item *
8429:
8430: courseacclog($what) : save message for course using &courselog(). Perform
8431: special processing for specific resource types (problems, exams, quizzes, etc).
8432:
8433: =item *
8434:
8435: goodbye() : flush course logs and log shutting down; it is called in srm.conf
8436: as a PerlChildExitHandler
8437:
8438: =back
8439:
8440: =head2 Other
8441:
8442: =over 4
8443:
8444: =item *
8445:
8446: symblist($mapname,%newhash) : update symbolic storage links
8447:
8448: =back
8449:
8450: =cut
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