1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.725 2006/04/06 18:04:23 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonnet;
31:
32: use strict;
33: use LWP::UserAgent();
34: use HTTP::Headers;
35: use HTTP::Date;
36: # use Date::Parse;
37: use vars
38: qw(%perlvar %hostname %badServerCache %iphost %spareid %hostdom
39: %libserv %pr %prp $memcache %packagetab
40: %courselogs %accesshash %userrolehash %domainrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf
42: %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati %domain_primary
44: $tmpdir $_64bit %env);
45:
46: use IO::Socket;
47: use GDBM_File;
48: use Apache::Constants qw(:common :http);
49: use HTML::LCParser;
50: use HTML::Parser;
51: use Fcntl qw(:flock);
52: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
53: use Time::HiRes qw( gettimeofday tv_interval );
54: use Cache::Memcached;
55: use Digest::MD5;
56:
57: my $readit;
58: my $max_connection_retries = 10; # Or some such value.
59:
60: require Exporter;
61:
62: our @ISA = qw (Exporter);
63: our @EXPORT = qw(%env);
64:
65: =pod
66:
67: =head1 Package Variables
68:
69: These are largely undocumented, so if you decipher one please note it here.
70:
71: =over 4
72:
73: =item $processmarker
74:
75: Contains the time this process was started and this servers host id.
76:
77: =item $dumpcount
78:
79: Counts the number of times a message log flush has been attempted (regardless
80: of success) by this process. Used as part of the filename when messages are
81: delayed.
82:
83: =back
84:
85: =cut
86:
87:
88: # --------------------------------------------------------------------- Logging
89:
90: sub logtouch {
91: my $execdir=$perlvar{'lonDaemons'};
92: unless (-e "$execdir/logs/lonnet.log") {
93: open(my $fh,">>$execdir/logs/lonnet.log");
94: close $fh;
95: }
96: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
97: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
98: }
99:
100: sub logthis {
101: my $message=shift;
102: my $execdir=$perlvar{'lonDaemons'};
103: my $now=time;
104: my $local=localtime($now);
105: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
106: print $fh "$local ($$): $message\n";
107: close($fh);
108: }
109: return 1;
110: }
111:
112: sub logperm {
113: my $message=shift;
114: my $execdir=$perlvar{'lonDaemons'};
115: my $now=time;
116: my $local=localtime($now);
117: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
118: print $fh "$now:$message:$local\n";
119: close($fh);
120: }
121: return 1;
122: }
123:
124: # -------------------------------------------------- Non-critical communication
125: sub subreply {
126: my ($cmd,$server)=@_;
127: my $peerfile="$perlvar{'lonSockDir'}/".$hostname{$server};
128: #
129: # With loncnew process trimming, there's a timing hole between lonc server
130: # process exit and the master server picking up the listen on the AF_UNIX
131: # socket. In that time interval, a lock file will exist:
132:
133: my $lockfile=$peerfile.".lock";
134: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
135: sleep(1);
136: }
137: # At this point, either a loncnew parent is listening or an old lonc
138: # or loncnew child is listening so we can connect or everything's dead.
139: #
140: # We'll give the connection a few tries before abandoning it. If
141: # connection is not possible, we'll con_lost back to the client.
142: #
143: my $client;
144: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
145: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
146: Type => SOCK_STREAM,
147: Timeout => 10);
148: if($client) {
149: last; # Connected!
150: }
151: sleep(1); # Try again later if failed connection.
152: }
153: my $answer;
154: if ($client) {
155: print $client "sethost:$server:$cmd\n";
156: $answer=<$client>;
157: if (!$answer) { $answer="con_lost"; }
158: chomp($answer);
159: } else {
160: $answer = 'con_lost'; # Failed connection.
161: }
162: return $answer;
163: }
164:
165: sub reply {
166: my ($cmd,$server)=@_;
167: unless (defined($hostname{$server})) { return 'no_such_host'; }
168: my $answer=subreply($cmd,$server);
169: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
170: &logthis("<font color=\"blue\">WARNING:".
171: " $cmd to $server returned $answer</font>");
172: }
173: return $answer;
174: }
175:
176: # ----------------------------------------------------------- Send USR1 to lonc
177:
178: sub reconlonc {
179: my $peerfile=shift;
180: &logthis("Trying to reconnect for $peerfile");
181: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
182: if (open(my $fh,"<$loncfile")) {
183: my $loncpid=<$fh>;
184: chomp($loncpid);
185: if (kill 0 => $loncpid) {
186: &logthis("lonc at pid $loncpid responding, sending USR1");
187: kill USR1 => $loncpid;
188: sleep 1;
189: if (-e "$peerfile") { return; }
190: &logthis("$peerfile still not there, give it another try");
191: sleep 5;
192: if (-e "$peerfile") { return; }
193: &logthis(
194: "<font color=\"blue\">WARNING: $peerfile still not there, giving up</font>");
195: } else {
196: &logthis(
197: "<font color=\"blue\">WARNING:".
198: " lonc at pid $loncpid not responding, giving up</font>");
199: }
200: } else {
201: &logthis('<font color="blue">WARNING: lonc not running, giving up</font>');
202: }
203: }
204:
205: # ------------------------------------------------------ Critical communication
206:
207: sub critical {
208: my ($cmd,$server)=@_;
209: unless ($hostname{$server}) {
210: &logthis("<font color=\"blue\">WARNING:".
211: " Critical message to unknown server ($server)</font>");
212: return 'no_such_host';
213: }
214: my $answer=reply($cmd,$server);
215: if ($answer eq 'con_lost') {
216: &reconlonc("$perlvar{'lonSockDir'}/$server");
217: my $answer=reply($cmd,$server);
218: if ($answer eq 'con_lost') {
219: my $now=time;
220: my $middlename=$cmd;
221: $middlename=substr($middlename,0,16);
222: $middlename=~s/\W//g;
223: my $dfilename=
224: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
225: $dumpcount++;
226: {
227: my $dfh;
228: if (open($dfh,">$dfilename")) {
229: print $dfh "$cmd\n";
230: close($dfh);
231: }
232: }
233: sleep 2;
234: my $wcmd='';
235: {
236: my $dfh;
237: if (open($dfh,"<$dfilename")) {
238: $wcmd=<$dfh>;
239: close($dfh);
240: }
241: }
242: chomp($wcmd);
243: if ($wcmd eq $cmd) {
244: &logthis("<font color=\"blue\">WARNING: ".
245: "Connection buffer $dfilename: $cmd</font>");
246: &logperm("D:$server:$cmd");
247: return 'con_delayed';
248: } else {
249: &logthis("<font color=\"red\">CRITICAL:"
250: ." Critical connection failed: $server $cmd</font>");
251: &logperm("F:$server:$cmd");
252: return 'con_failed';
253: }
254: }
255: }
256: return $answer;
257: }
258:
259: # ------------------------------------------- Transfer profile into environment
260:
261: sub transfer_profile_to_env {
262: my ($lonidsdir,$handle)=@_;
263: if (!defined($lonidsdir)) {
264: $lonidsdir = $perlvar{'lonIDsDir'};
265: }
266: if (!defined($handle)) {
267: ($handle) = ($env{'user.environment'} =~m|/([^/]+)\.id$| );
268: }
269:
270: my @profile;
271: {
272: open(my $idf,"$lonidsdir/$handle.id");
273: flock($idf,LOCK_SH);
274: @profile=<$idf>;
275: close($idf);
276: }
277: my $envi;
278: my %Remove;
279: for ($envi=0;$envi<=$#profile;$envi++) {
280: chomp($profile[$envi]);
281: my ($envname,$envvalue)=split(/=/,$profile[$envi],2);
282: $env{$envname} = $envvalue;
283: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
284: if ($time < time-300) {
285: $Remove{$key}++;
286: }
287: }
288: }
289: $env{'user.environment'} = "$lonidsdir/$handle.id";
290: foreach my $expired_key (keys(%Remove)) {
291: &delenv($expired_key);
292: }
293: }
294:
295: # ---------------------------------------------------------- Append Environment
296:
297: sub appenv {
298: my %newenv=@_;
299: foreach my $key (keys(%newenv)) {
300: if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
301: &logthis("<font color=\"blue\">WARNING: ".
302: "Attempt to modify environment ".$key." to ".$newenv{$key}
303: .'</font>');
304: delete($newenv{$key});
305: } else {
306: $env{$key}=$newenv{$key};
307: }
308: }
309:
310: my $lockfh;
311: unless (open($lockfh,"$env{'user.environment'}")) {
312: return 'error: '.$!;
313: }
314: unless (flock($lockfh,LOCK_EX)) {
315: &logthis("<font color=\"blue\">WARNING: ".
316: 'Could not obtain exclusive lock in appenv: '.$!);
317: close($lockfh);
318: return 'error: '.$!;
319: }
320:
321: my @oldenv;
322: {
323: my $fh;
324: unless (open($fh,"$env{'user.environment'}")) {
325: return 'error: '.$!;
326: }
327: @oldenv=<$fh>;
328: close($fh);
329: }
330: for (my $i=0; $i<=$#oldenv; $i++) {
331: chomp($oldenv[$i]);
332: if ($oldenv[$i] ne '') {
333: my ($name,$value)=split(/=/,$oldenv[$i],2);
334: unless (defined($newenv{$name})) {
335: $newenv{$name}=$value;
336: }
337: }
338: }
339: {
340: my $fh;
341: unless (open($fh,">$env{'user.environment'}")) {
342: return 'error';
343: }
344: my $newname;
345: foreach $newname (keys %newenv) {
346: print $fh "$newname=$newenv{$newname}\n";
347: }
348: close($fh);
349: }
350:
351: close($lockfh);
352: return 'ok';
353: }
354: # ----------------------------------------------------- Delete from Environment
355:
356: sub delenv {
357: my $delthis=shift;
358: my %newenv=();
359: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
360: &logthis("<font color=\"blue\">WARNING: ".
361: "Attempt to delete from environment ".$delthis);
362: return 'error';
363: }
364: my @oldenv;
365: {
366: my $fh;
367: unless (open($fh,"$env{'user.environment'}")) {
368: return 'error';
369: }
370: unless (flock($fh,LOCK_SH)) {
371: &logthis("<font color=\"blue\">WARNING: ".
372: 'Could not obtain shared lock in delenv: '.$!);
373: close($fh);
374: return 'error: '.$!;
375: }
376: @oldenv=<$fh>;
377: close($fh);
378: }
379: {
380: my $fh;
381: unless (open($fh,">$env{'user.environment'}")) {
382: return 'error';
383: }
384: unless (flock($fh,LOCK_EX)) {
385: &logthis("<font color=\"blue\">WARNING: ".
386: 'Could not obtain exclusive lock in delenv: '.$!);
387: close($fh);
388: return 'error: '.$!;
389: }
390: foreach my $cur_key (@oldenv) {
391: if ($cur_key=~/^$delthis/) {
392: my ($key,undef) = split('=',$cur_key,2);
393: delete($env{$key});
394: } else {
395: print $fh $cur_key;
396: }
397: }
398: close($fh);
399: }
400: return 'ok';
401: }
402:
403: # ------------------------------------------ Find out current server userload
404: # there is a copy in lond
405: sub userload {
406: my $numusers=0;
407: {
408: opendir(LONIDS,$perlvar{'lonIDsDir'});
409: my $filename;
410: my $curtime=time;
411: while ($filename=readdir(LONIDS)) {
412: if ($filename eq '.' || $filename eq '..') {next;}
413: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
414: if ($curtime-$mtime < 1800) { $numusers++; }
415: }
416: closedir(LONIDS);
417: }
418: my $userloadpercent=0;
419: my $maxuserload=$perlvar{'lonUserLoadLim'};
420: if ($maxuserload) {
421: $userloadpercent=100*$numusers/$maxuserload;
422: }
423: $userloadpercent=sprintf("%.2f",$userloadpercent);
424: return $userloadpercent;
425: }
426:
427: # ------------------------------------------ Fight off request when overloaded
428:
429: sub overloaderror {
430: my ($r,$checkserver)=@_;
431: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
432: my $loadavg;
433: if ($checkserver eq $perlvar{'lonHostID'}) {
434: open(my $loadfile,'/proc/loadavg');
435: $loadavg=<$loadfile>;
436: $loadavg =~ s/\s.*//g;
437: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
438: close($loadfile);
439: } else {
440: $loadavg=&reply('load',$checkserver);
441: }
442: my $overload=$loadavg-100;
443: if ($overload>0) {
444: $r->err_headers_out->{'Retry-After'}=$overload;
445: $r->log_error('Overload of '.$overload.' on '.$checkserver);
446: return 413;
447: }
448: return '';
449: }
450:
451: # ------------------------------ Find server with least workload from spare.tab
452:
453: sub spareserver {
454: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
455: my $tryserver;
456: my $spareserver='';
457: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
458: my $lowestserver=$loadpercent > $userloadpercent?
459: $loadpercent : $userloadpercent;
460: foreach $tryserver (keys(%spareid)) {
461: my $loadans=&reply('load',$tryserver);
462: my $userloadans=&reply('userload',$tryserver);
463: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
464: next; #didn't get a number from the server
465: }
466: my $answer;
467: if ($loadans =~ /\d/) {
468: if ($userloadans =~ /\d/) {
469: #both are numbers, pick the bigger one
470: $answer=$loadans > $userloadans?
471: $loadans : $userloadans;
472: } else {
473: $answer = $loadans;
474: }
475: } else {
476: $answer = $userloadans;
477: }
478: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
479: if ($want_server_name) {
480: $spareserver=$tryserver;
481: } else {
482: $spareserver="http://$hostname{$tryserver}";
483: }
484: $lowestserver=$answer;
485: }
486: }
487: return $spareserver;
488: }
489:
490: # --------------------------------------------- Try to change a user's password
491:
492: sub changepass {
493: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
494: $currentpass = &escape($currentpass);
495: $newpass = &escape($newpass);
496: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
497: $server);
498: if (! $answer) {
499: &logthis("No reply on password change request to $server ".
500: "by $uname in domain $udom.");
501: } elsif ($answer =~ "^ok") {
502: &logthis("$uname in $udom successfully changed their password ".
503: "on $server.");
504: } elsif ($answer =~ "^pwchange_failure") {
505: &logthis("$uname in $udom was unable to change their password ".
506: "on $server. The action was blocked by either lcpasswd ".
507: "or pwchange");
508: } elsif ($answer =~ "^non_authorized") {
509: &logthis("$uname in $udom did not get their password correct when ".
510: "attempting to change it on $server.");
511: } elsif ($answer =~ "^auth_mode_error") {
512: &logthis("$uname in $udom attempted to change their password despite ".
513: "not being locally or internally authenticated on $server.");
514: } elsif ($answer =~ "^unknown_user") {
515: &logthis("$uname in $udom attempted to change their password ".
516: "on $server but were unable to because $server is not ".
517: "their home server.");
518: } elsif ($answer =~ "^refused") {
519: &logthis("$server refused to change $uname in $udom password because ".
520: "it was sent an unencrypted request to change the password.");
521: }
522: return $answer;
523: }
524:
525: # ----------------------- Try to determine user's current authentication scheme
526:
527: sub queryauthenticate {
528: my ($uname,$udom)=@_;
529: my $uhome=&homeserver($uname,$udom);
530: if (!$uhome) {
531: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
532: return 'no_host';
533: }
534: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
535: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
536: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
537: }
538: return $answer;
539: }
540:
541: # --------- Try to authenticate user from domain's lib servers (first this one)
542:
543: sub authenticate {
544: my ($uname,$upass,$udom)=@_;
545: $upass=escape($upass);
546: $uname=~s/\W//g;
547: my $uhome=&homeserver($uname,$udom);
548: if (!$uhome) {
549: &logthis("User $uname at $udom is unknown in authenticate");
550: return 'no_host';
551: }
552: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
553: if ($answer eq 'authorized') {
554: &logthis("User $uname at $udom authorized by $uhome");
555: return $uhome;
556: }
557: if ($answer eq 'non_authorized') {
558: &logthis("User $uname at $udom rejected by $uhome");
559: return 'no_host';
560: }
561: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
562: return 'no_host';
563: }
564:
565: # ---------------------- Find the homebase for a user from domain's lib servers
566:
567: my %homecache;
568: sub homeserver {
569: my ($uname,$udom,$ignoreBadCache)=@_;
570: my $index="$uname:$udom";
571:
572: if (exists($homecache{$index})) { return $homecache{$index}; }
573: my $tryserver;
574: foreach $tryserver (keys %libserv) {
575: next if ($ignoreBadCache ne 'true' &&
576: exists($badServerCache{$tryserver}));
577: if ($hostdom{$tryserver} eq $udom) {
578: my $answer=reply("home:$udom:$uname",$tryserver);
579: if ($answer eq 'found') {
580: return $homecache{$index}=$tryserver;
581: } elsif ($answer eq 'no_host') {
582: $badServerCache{$tryserver}=1;
583: }
584: }
585: }
586: return 'no_host';
587: }
588:
589: # ------------------------------------- Find the usernames behind a list of IDs
590:
591: sub idget {
592: my ($udom,@ids)=@_;
593: my %returnhash=();
594:
595: my $tryserver;
596: foreach $tryserver (keys %libserv) {
597: if ($hostdom{$tryserver} eq $udom) {
598: my $idlist=join('&',@ids);
599: $idlist=~tr/A-Z/a-z/;
600: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
601: my @answer=();
602: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
603: @answer=split(/\&/,$reply);
604: } ;
605: my $i;
606: for ($i=0;$i<=$#ids;$i++) {
607: if ($answer[$i]) {
608: $returnhash{$ids[$i]}=$answer[$i];
609: }
610: }
611: }
612: }
613: return %returnhash;
614: }
615:
616: # ------------------------------------- Find the IDs behind a list of usernames
617:
618: sub idrget {
619: my ($udom,@unames)=@_;
620: my %returnhash=();
621: foreach (@unames) {
622: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
623: }
624: return %returnhash;
625: }
626:
627: # ------------------------------- Store away a list of names and associated IDs
628:
629: sub idput {
630: my ($udom,%ids)=@_;
631: my %servers=();
632: foreach (keys %ids) {
633: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
634: my $uhom=&homeserver($_,$udom);
635: if ($uhom ne 'no_host') {
636: my $id=&escape($ids{$_});
637: $id=~tr/A-Z/a-z/;
638: my $unam=&escape($_);
639: if ($servers{$uhom}) {
640: $servers{$uhom}.='&'.$id.'='.$unam;
641: } else {
642: $servers{$uhom}=$id.'='.$unam;
643: }
644: }
645: }
646: foreach (keys %servers) {
647: &critical('idput:'.$udom.':'.$servers{$_},$_);
648: }
649: }
650:
651: # --------------------------------------------------- Assign a key to a student
652:
653: sub assign_access_key {
654: #
655: # a valid key looks like uname:udom#comments
656: # comments are being appended
657: #
658: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
659: $kdom=
660: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
661: $knum=
662: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
663: $cdom=
664: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
665: $cnum=
666: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
667: $udom=$env{'user.name'} unless (defined($udom));
668: $uname=$env{'user.domain'} unless (defined($uname));
669: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
670: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
671: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
672: # assigned to this person
673: # - this should not happen,
674: # unless something went wrong
675: # the first time around
676: # ready to assign
677: $logentry=$1.'; '.$logentry;
678: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
679: $kdom,$knum) eq 'ok') {
680: # key now belongs to user
681: my $envkey='key.'.$cdom.'_'.$cnum;
682: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
683: &appenv('environment.'.$envkey => $ckey);
684: return 'ok';
685: } else {
686: return
687: 'error: Count not permanently assign key, will need to be re-entered later.';
688: }
689: } else {
690: return 'error: Could not assign key, try again later.';
691: }
692: } elsif (!$existing{$ckey}) {
693: # the key does not exist
694: return 'error: The key does not exist';
695: } else {
696: # the key is somebody else's
697: return 'error: The key is already in use';
698: }
699: }
700:
701: # ------------------------------------------ put an additional comment on a key
702:
703: sub comment_access_key {
704: #
705: # a valid key looks like uname:udom#comments
706: # comments are being appended
707: #
708: my ($ckey,$cdom,$cnum,$logentry)=@_;
709: $cdom=
710: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
711: $cnum=
712: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
713: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
714: if ($existing{$ckey}) {
715: $existing{$ckey}.='; '.$logentry;
716: # ready to assign
717: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
718: $cdom,$cnum) eq 'ok') {
719: return 'ok';
720: } else {
721: return 'error: Count not store comment.';
722: }
723: } else {
724: # the key does not exist
725: return 'error: The key does not exist';
726: }
727: }
728:
729: # ------------------------------------------------------ Generate a set of keys
730:
731: sub generate_access_keys {
732: my ($number,$cdom,$cnum,$logentry)=@_;
733: $cdom=
734: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
735: $cnum=
736: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
737: unless (&allowed('mky',$cdom)) { return 0; }
738: unless (($cdom) && ($cnum)) { return 0; }
739: if ($number>10000) { return 0; }
740: sleep(2); # make sure don't get same seed twice
741: srand(time()^($$+($$<<15))); # from "Programming Perl"
742: my $total=0;
743: for (my $i=1;$i<=$number;$i++) {
744: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
745: sprintf("%lx",int(100000*rand)).'-'.
746: sprintf("%lx",int(100000*rand));
747: $newkey=~s/1/g/g; # folks mix up 1 and l
748: $newkey=~s/0/h/g; # and also 0 and O
749: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
750: if ($existing{$newkey}) {
751: $i--;
752: } else {
753: if (&put('accesskeys',
754: { $newkey => '# generated '.localtime().
755: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
756: '; '.$logentry },
757: $cdom,$cnum) eq 'ok') {
758: $total++;
759: }
760: }
761: }
762: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
763: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
764: return $total;
765: }
766:
767: # ------------------------------------------------------- Validate an accesskey
768:
769: sub validate_access_key {
770: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
771: $cdom=
772: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
773: $cnum=
774: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
775: $udom=$env{'user.domain'} unless (defined($udom));
776: $uname=$env{'user.name'} unless (defined($uname));
777: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
778: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
779: }
780:
781: # ------------------------------------- Find the section of student in a course
782: sub devalidate_getsection_cache {
783: my ($udom,$unam,$courseid)=@_;
784: $courseid=~s/\_/\//g;
785: $courseid=~s/^(\w)/\/$1/;
786: my $hashid="$udom:$unam:$courseid";
787: &devalidate_cache_new('getsection',$hashid);
788: }
789:
790: sub getsection {
791: my ($udom,$unam,$courseid)=@_;
792: my $cachetime=1800;
793: $courseid=~s/\_/\//g;
794: $courseid=~s/^(\w)/\/$1/;
795:
796: my $hashid="$udom:$unam:$courseid";
797: my ($result,$cached)=&is_cached_new('getsection',$hashid);
798: if (defined($cached)) { return $result; }
799:
800: my %Pending;
801: my %Expired;
802: #
803: # Each role can either have not started yet (pending), be active,
804: # or have expired.
805: #
806: # If there is an active role, we are done.
807: #
808: # If there is more than one role which has not started yet,
809: # choose the one which will start sooner
810: # If there is one role which has not started yet, return it.
811: #
812: # If there is more than one expired role, choose the one which ended last.
813: # If there is a role which has expired, return it.
814: #
815: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
816: &homeserver($unam,$udom)))) {
817: my ($key,$value)=split(/\=/,$_);
818: $key=&unescape($key);
819: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
820: my $section=$1;
821: if ($key eq $courseid.'_st') { $section=''; }
822: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
823: my $now=time;
824: if (defined($end) && $end && ($now > $end)) {
825: $Expired{$end}=$section;
826: next;
827: }
828: if (defined($start) && $start && ($now < $start)) {
829: $Pending{$start}=$section;
830: next;
831: }
832: return &do_cache_new('getsection',$hashid,$section,$cachetime);
833: }
834: #
835: # Presumedly there will be few matching roles from the above
836: # loop and the sorting time will be negligible.
837: if (scalar(keys(%Pending))) {
838: my ($time) = sort {$a <=> $b} keys(%Pending);
839: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
840: }
841: if (scalar(keys(%Expired))) {
842: my @sorted = sort {$a <=> $b} keys(%Expired);
843: my $time = pop(@sorted);
844: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
845: }
846: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
847: }
848:
849: sub save_cache {
850: my ($r)=@_;
851: if (! $r->is_initial_req()) { return DECLINED; }
852: &purge_remembered();
853: #&Apache::loncommon::validate_page();
854: undef(%env);
855: return OK;
856: }
857:
858: my $to_remember=-1;
859: my %remembered;
860: my %accessed;
861: my $kicks=0;
862: my $hits=0;
863: sub devalidate_cache_new {
864: my ($name,$id,$debug) = @_;
865: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
866: $id=&escape($name.':'.$id);
867: $memcache->delete($id);
868: delete($remembered{$id});
869: delete($accessed{$id});
870: }
871:
872: sub is_cached_new {
873: my ($name,$id,$debug) = @_;
874: $id=&escape($name.':'.$id);
875: if (exists($remembered{$id})) {
876: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
877: $accessed{$id}=[&gettimeofday()];
878: $hits++;
879: return ($remembered{$id},1);
880: }
881: my $value = $memcache->get($id);
882: if (!(defined($value))) {
883: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
884: return (undef,undef);
885: }
886: if ($value eq '__undef__') {
887: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
888: $value=undef;
889: }
890: &make_room($id,$value,$debug);
891: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
892: return ($value,1);
893: }
894:
895: sub do_cache_new {
896: my ($name,$id,$value,$time,$debug) = @_;
897: $id=&escape($name.':'.$id);
898: my $setvalue=$value;
899: if (!defined($setvalue)) {
900: $setvalue='__undef__';
901: }
902: if (!defined($time) ) {
903: $time=600;
904: }
905: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
906: $memcache->set($id,$setvalue,$time);
907: # need to make a copy of $value
908: #&make_room($id,$value,$debug);
909: return $value;
910: }
911:
912: sub make_room {
913: my ($id,$value,$debug)=@_;
914: $remembered{$id}=$value;
915: if ($to_remember<0) { return; }
916: $accessed{$id}=[&gettimeofday()];
917: if (scalar(keys(%remembered)) <= $to_remember) { return; }
918: my $to_kick;
919: my $max_time=0;
920: foreach my $other (keys(%accessed)) {
921: if (&tv_interval($accessed{$other}) > $max_time) {
922: $to_kick=$other;
923: $max_time=&tv_interval($accessed{$other});
924: }
925: }
926: delete($remembered{$to_kick});
927: delete($accessed{$to_kick});
928: $kicks++;
929: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
930: return;
931: }
932:
933: sub purge_remembered {
934: #&logthis("Tossing ".scalar(keys(%remembered)));
935: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
936: undef(%remembered);
937: undef(%accessed);
938: }
939: # ------------------------------------- Read an entry from a user's environment
940:
941: sub userenvironment {
942: my ($udom,$unam,@what)=@_;
943: my %returnhash=();
944: my @answer=split(/\&/,
945: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
946: &homeserver($unam,$udom)));
947: my $i;
948: for ($i=0;$i<=$#what;$i++) {
949: $returnhash{$what[$i]}=&unescape($answer[$i]);
950: }
951: return %returnhash;
952: }
953:
954: # ---------------------------------------------------------- Get a studentphoto
955: sub studentphoto {
956: my ($udom,$unam,$ext) = @_;
957: my $home=&Apache::lonnet::homeserver($unam,$udom);
958: if (defined($env{'request.course.id'})) {
959: if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
960: if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
961: return(&retrievestudentphoto($udom,$unam,$ext));
962: } else {
963: my ($result,$perm_reqd)=
964: &Apache::lonnet::auto_photo_permission($unam,$udom);
965: if ($result eq 'ok') {
966: if (!($perm_reqd eq 'yes')) {
967: return(&retrievestudentphoto($udom,$unam,$ext));
968: }
969: }
970: }
971: }
972: } else {
973: my ($result,$perm_reqd) =
974: &Apache::lonnet::auto_photo_permission($unam,$udom);
975: if ($result eq 'ok') {
976: if (!($perm_reqd eq 'yes')) {
977: return(&retrievestudentphoto($udom,$unam,$ext));
978: }
979: }
980: }
981: return '/adm/lonKaputt/lonlogo_broken.gif';
982: }
983:
984: sub retrievestudentphoto {
985: my ($udom,$unam,$ext,$type) = @_;
986: my $home=&Apache::lonnet::homeserver($unam,$udom);
987: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
988: if ($ret eq 'ok') {
989: my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
990: if ($type eq 'thumbnail') {
991: $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
992: }
993: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
994: return $tokenurl;
995: } else {
996: if ($type eq 'thumbnail') {
997: return '/adm/lonKaputt/genericstudent_tn.gif';
998: } else {
999: return '/adm/lonKaputt/lonlogo_broken.gif';
1000: }
1001: }
1002: }
1003:
1004: # -------------------------------------------------------------------- New chat
1005:
1006: sub chatsend {
1007: my ($newentry,$anon,$group)=@_;
1008: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1009: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1010: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1011: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1012: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
1013: &escape($newentry)).':'.$group,$chome);
1014: }
1015:
1016: # ------------------------------------------ Find current version of a resource
1017:
1018: sub getversion {
1019: my $fname=&clutter(shift);
1020: unless ($fname=~/^\/res\//) { return -1; }
1021: return ¤tversion(&filelocation('',$fname));
1022: }
1023:
1024: sub currentversion {
1025: my $fname=shift;
1026: my ($result,$cached)=&is_cached_new('resversion',$fname);
1027: if (defined($cached)) { return $result; }
1028: my $author=$fname;
1029: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1030: my ($udom,$uname)=split(/\//,$author);
1031: my $home=homeserver($uname,$udom);
1032: if ($home eq 'no_host') {
1033: return -1;
1034: }
1035: my $answer=reply("currentversion:$fname",$home);
1036: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1037: return -1;
1038: }
1039: return &do_cache_new('resversion',$fname,$answer,600);
1040: }
1041:
1042: # ----------------------------- Subscribe to a resource, return URL if possible
1043:
1044: sub subscribe {
1045: my $fname=shift;
1046: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1047: $fname=~s/[\n\r]//g;
1048: my $author=$fname;
1049: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1050: my ($udom,$uname)=split(/\//,$author);
1051: my $home=homeserver($uname,$udom);
1052: if ($home eq 'no_host') {
1053: return 'not_found';
1054: }
1055: my $answer=reply("sub:$fname",$home);
1056: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1057: $answer.=' by '.$home;
1058: }
1059: return $answer;
1060: }
1061:
1062: # -------------------------------------------------------------- Replicate file
1063:
1064: sub repcopy {
1065: my $filename=shift;
1066: $filename=~s/\/+/\//g;
1067: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1068: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1069: if ($filename=~m|^/home/httpd/html/userfiles/| or
1070: $filename=~m -^/*(uploaded|editupload)/-) {
1071: return &repcopy_userfile($filename);
1072: }
1073: $filename=~s/[\n\r]//g;
1074: my $transname="$filename.in.transfer";
1075: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1076: my $remoteurl=subscribe($filename);
1077: if ($remoteurl =~ /^con_lost by/) {
1078: &logthis("Subscribe returned $remoteurl: $filename");
1079: return 'unavailable';
1080: } elsif ($remoteurl eq 'not_found') {
1081: #&logthis("Subscribe returned not_found: $filename");
1082: return 'not_found';
1083: } elsif ($remoteurl =~ /^rejected by/) {
1084: &logthis("Subscribe returned $remoteurl: $filename");
1085: return 'forbidden';
1086: } elsif ($remoteurl eq 'directory') {
1087: return 'ok';
1088: } else {
1089: my $author=$filename;
1090: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1091: my ($udom,$uname)=split(/\//,$author);
1092: my $home=homeserver($uname,$udom);
1093: unless ($home eq $perlvar{'lonHostID'}) {
1094: my @parts=split(/\//,$filename);
1095: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1096: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1097: &logthis("Malconfiguration for replication: $filename");
1098: return 'bad_request';
1099: }
1100: my $count;
1101: for ($count=5;$count<$#parts;$count++) {
1102: $path.="/$parts[$count]";
1103: if ((-e $path)!=1) {
1104: mkdir($path,0777);
1105: }
1106: }
1107: my $ua=new LWP::UserAgent;
1108: my $request=new HTTP::Request('GET',"$remoteurl");
1109: my $response=$ua->request($request,$transname);
1110: if ($response->is_error()) {
1111: unlink($transname);
1112: my $message=$response->status_line;
1113: &logthis("<font color=\"blue\">WARNING:"
1114: ." LWP get: $message: $filename</font>");
1115: return 'unavailable';
1116: } else {
1117: if ($remoteurl!~/\.meta$/) {
1118: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1119: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1120: if ($mresponse->is_error()) {
1121: unlink($filename.'.meta');
1122: &logthis(
1123: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1124: }
1125: }
1126: rename($transname,$filename);
1127: return 'ok';
1128: }
1129: }
1130: }
1131: }
1132:
1133: # ------------------------------------------------ Get server side include body
1134: sub ssi_body {
1135: my ($filelink,%form)=@_;
1136: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1137: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1138: }
1139: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1140: &ssi($filelink,%form));
1141: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs;
1142: $output=~s/^.*?\<body[^\>]*\>//si;
1143: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1144: return $output;
1145: }
1146:
1147: # --------------------------------------------------------- Server Side Include
1148:
1149: sub ssi {
1150:
1151: my ($fn,%form)=@_;
1152:
1153: my $ua=new LWP::UserAgent;
1154:
1155: my $request;
1156:
1157: $form{'no_update_last_known'}=1;
1158:
1159: if (%form) {
1160: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1161: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1162: } else {
1163: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1164: }
1165:
1166: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1167: my $response=$ua->request($request);
1168:
1169: return $response->content;
1170: }
1171:
1172: sub externalssi {
1173: my ($url)=@_;
1174: my $ua=new LWP::UserAgent;
1175: my $request=new HTTP::Request('GET',$url);
1176: my $response=$ua->request($request);
1177: return $response->content;
1178: }
1179:
1180: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1181:
1182: sub allowuploaded {
1183: my ($srcurl,$url)=@_;
1184: $url=&clutter(&declutter($url));
1185: my $dir=$url;
1186: $dir=~s/\/[^\/]+$//;
1187: my %httpref=();
1188: my $httpurl=&hreflocation('',$url);
1189: $httpref{'httpref.'.$httpurl}=$srcurl;
1190: &Apache::lonnet::appenv(%httpref);
1191: }
1192:
1193: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1194: # input: action, courseID, current domain, intended
1195: # path to file, source of file, instruction to parse file for objects,
1196: # ref to hash for embedded objects,
1197: # ref to hash for codebase of java objects.
1198: #
1199: # output: url to file (if action was uploaddoc),
1200: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1201: #
1202: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1203: # course.
1204: #
1205: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1206: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1207: # course's home server.
1208: #
1209: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1210: # be copied from $source (current location) to
1211: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1212: # and will then be copied to
1213: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1214: # course's home server.
1215: #
1216: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1217: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1218: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1219: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1220: # in course's home server.
1221: #
1222:
1223: sub process_coursefile {
1224: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1225: my $fetchresult;
1226: my $home=&homeserver($docuname,$docudom);
1227: if ($action eq 'propagate') {
1228: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1229: $home);
1230: } else {
1231: my $fpath = '';
1232: my $fname = $file;
1233: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1234: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1235: my $filepath = &build_filepath($fpath);
1236: if ($action eq 'copy') {
1237: if ($source eq '') {
1238: $fetchresult = 'no source file';
1239: return $fetchresult;
1240: } else {
1241: my $destination = $filepath.'/'.$fname;
1242: rename($source,$destination);
1243: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1244: $home);
1245: }
1246: } elsif ($action eq 'uploaddoc') {
1247: open(my $fh,'>'.$filepath.'/'.$fname);
1248: print $fh $env{'form.'.$source};
1249: close($fh);
1250: if ($parser eq 'parse') {
1251: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1252: unless ($parse_result eq 'ok') {
1253: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1254: }
1255: }
1256: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1257: $home);
1258: if ($fetchresult eq 'ok') {
1259: return '/uploaded/'.$fpath.'/'.$fname;
1260: } else {
1261: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1262: ' to host '.$home.': '.$fetchresult);
1263: return '/adm/notfound.html';
1264: }
1265: }
1266: }
1267: unless ( $fetchresult eq 'ok') {
1268: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1269: ' to host '.$home.': '.$fetchresult);
1270: }
1271: return $fetchresult;
1272: }
1273:
1274: sub build_filepath {
1275: my ($fpath) = @_;
1276: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1277: unless ($fpath eq '') {
1278: my @parts=split('/',$fpath);
1279: foreach my $part (@parts) {
1280: $filepath.= '/'.$part;
1281: if ((-e $filepath)!=1) {
1282: mkdir($filepath,0777);
1283: }
1284: }
1285: }
1286: return $filepath;
1287: }
1288:
1289: sub store_edited_file {
1290: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1291: my $file = $primary_url;
1292: $file =~ s#^/uploaded/$docudom/$docuname/##;
1293: my $fpath = '';
1294: my $fname = $file;
1295: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1296: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1297: my $filepath = &build_filepath($fpath);
1298: open(my $fh,'>'.$filepath.'/'.$fname);
1299: print $fh $content;
1300: close($fh);
1301: my $home=&homeserver($docuname,$docudom);
1302: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1303: $home);
1304: if ($$fetchresult eq 'ok') {
1305: return '/uploaded/'.$fpath.'/'.$fname;
1306: } else {
1307: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1308: ' to host '.$home.': '.$$fetchresult);
1309: return '/adm/notfound.html';
1310: }
1311: }
1312:
1313: sub clean_filename {
1314: my ($fname)=@_;
1315: # Replace Windows backslashes by forward slashes
1316: $fname=~s/\\/\//g;
1317: # Get rid of everything but the actual filename
1318: $fname=~s/^.*\/([^\/]+)$/$1/;
1319: # Replace spaces by underscores
1320: $fname=~s/\s+/\_/g;
1321: # Replace all other weird characters by nothing
1322: $fname=~s/[^\w\.\-]//g;
1323: # Replace all .\d. sequences with _\d. so they no longer look like version
1324: # numbers
1325: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1326: return $fname;
1327: }
1328:
1329: # --------------- Take an uploaded file and put it into the userfiles directory
1330: # input: $formname - the contents of the file are in $env{"form.$formname"}
1331: # the desired filenam is in $env{"form.$formname.filename"}
1332: # $coursedoc - if true up to the current course
1333: # if false
1334: # $subdir - directory in userfile to store the file into
1335: # $parser, $allfiles, $codebase - unknown
1336: #
1337: # output: url of file in userspace, or error: <message>
1338: # or /adm/notfound.html if failure to upload occurse
1339:
1340:
1341: sub userfileupload {
1342: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,$destudom)=@_;
1343: if (!defined($subdir)) { $subdir='unknown'; }
1344: my $fname=$env{'form.'.$formname.'.filename'};
1345: $fname=&clean_filename($fname);
1346: # See if there is anything left
1347: unless ($fname) { return 'error: no uploaded file'; }
1348: chop($env{'form.'.$formname});
1349: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1350: my $now = time;
1351: my $filepath = 'tmp/helprequests/'.$now;
1352: my @parts=split(/\//,$filepath);
1353: my $fullpath = $perlvar{'lonDaemons'};
1354: for (my $i=0;$i<@parts;$i++) {
1355: $fullpath .= '/'.$parts[$i];
1356: if ((-e $fullpath)!=1) {
1357: mkdir($fullpath,0777);
1358: }
1359: }
1360: open(my $fh,'>'.$fullpath.'/'.$fname);
1361: print $fh $env{'form.'.$formname};
1362: close($fh);
1363: return $fullpath.'/'.$fname;
1364: }
1365:
1366: # Create the directory if not present
1367: $fname="$subdir/$fname";
1368: if ($coursedoc) {
1369: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1370: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1371: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1372: return &finishuserfileupload($docuname,$docudom,
1373: $formname,$fname,$parser,$allfiles,
1374: $codebase);
1375: } else {
1376: $fname=$env{'form.folder'}.'/'.$fname;
1377: return &process_coursefile('uploaddoc',$docuname,$docudom,
1378: $fname,$formname,$parser,
1379: $allfiles,$codebase);
1380: }
1381: } elsif (defined($destuname)) {
1382: my $docuname=$destuname;
1383: my $docudom=$destudom;
1384: return &finishuserfileupload($docuname,$docudom,$formname,
1385: $fname,$parser,$allfiles,$codebase);
1386:
1387: } else {
1388: my $docuname=$env{'user.name'};
1389: my $docudom=$env{'user.domain'};
1390: if (exists($env{'form.group'})) {
1391: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1392: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1393: }
1394: return &finishuserfileupload($docuname,$docudom,$formname,
1395: $fname,$parser,$allfiles,$codebase);
1396: }
1397: }
1398:
1399: sub finishuserfileupload {
1400: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
1401: my $path=$docudom.'/'.$docuname.'/';
1402: my $filepath=$perlvar{'lonDocRoot'};
1403: my ($fnamepath,$file);
1404: $file=$fname;
1405: if ($fname=~m|/|) {
1406: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1407: $path.=$fnamepath.'/';
1408: }
1409: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1410: my $count;
1411: for ($count=4;$count<=$#parts;$count++) {
1412: $filepath.="/$parts[$count]";
1413: if ((-e $filepath)!=1) {
1414: mkdir($filepath,0777);
1415: }
1416: }
1417: # Save the file
1418: {
1419: if (!open(FH,'>'.$filepath.'/'.$file)) {
1420: &logthis('Failed to create '.$filepath.'/'.$file);
1421: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1422: return '/adm/notfound.html';
1423: }
1424: if (!print FH ($env{'form.'.$formname})) {
1425: &logthis('Failed to write to '.$filepath.'/'.$file);
1426: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1427: return '/adm/notfound.html';
1428: }
1429: close(FH);
1430: }
1431: if ($parser eq 'parse') {
1432: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1433: $codebase);
1434: unless ($parse_result eq 'ok') {
1435: &logthis('Failed to parse '.$filepath.$file.
1436: ' for embedded media: '.$parse_result);
1437: }
1438: }
1439: # Notify homeserver to grep it
1440: #
1441: my $docuhome=&homeserver($docuname,$docudom);
1442: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1443: if ($fetchresult eq 'ok') {
1444: #
1445: # Return the URL to it
1446: return '/uploaded/'.$path.$file;
1447: } else {
1448: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1449: ': '.$fetchresult);
1450: return '/adm/notfound.html';
1451: }
1452: }
1453:
1454: sub extract_embedded_items {
1455: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1456: my @state = ();
1457: my %javafiles = (
1458: codebase => '',
1459: code => '',
1460: archive => ''
1461: );
1462: my %mediafiles = (
1463: src => '',
1464: movie => '',
1465: );
1466: my $p;
1467: if ($content) {
1468: $p = HTML::LCParser->new($content);
1469: } else {
1470: $p = HTML::LCParser->new($filepath.'/'.$file);
1471: }
1472: while (my $t=$p->get_token()) {
1473: if ($t->[0] eq 'S') {
1474: my ($tagname, $attr) = ($t->[1],$t->[2]);
1475: push (@state, $tagname);
1476: if (lc($tagname) eq 'allow') {
1477: &add_filetype($allfiles,$attr->{'src'},'src');
1478: }
1479: if (lc($tagname) eq 'img') {
1480: &add_filetype($allfiles,$attr->{'src'},'src');
1481: }
1482: if (lc($tagname) eq 'script') {
1483: if ($attr->{'archive'} =~ /\.jar$/i) {
1484: &add_filetype($allfiles,$attr->{'archive'},'archive');
1485: } else {
1486: &add_filetype($allfiles,$attr->{'src'},'src');
1487: }
1488: }
1489: if (lc($tagname) eq 'link') {
1490: if (lc($attr->{'rel'}) eq 'stylesheet') {
1491: &add_filetype($allfiles,$attr->{'href'},'href');
1492: }
1493: }
1494: if (lc($tagname) eq 'object' ||
1495: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1496: foreach my $item (keys(%javafiles)) {
1497: $javafiles{$item} = '';
1498: }
1499: }
1500: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1501: my $name = lc($attr->{'name'});
1502: foreach my $item (keys(%javafiles)) {
1503: if ($name eq $item) {
1504: $javafiles{$item} = $attr->{'value'};
1505: last;
1506: }
1507: }
1508: foreach my $item (keys(%mediafiles)) {
1509: if ($name eq $item) {
1510: &add_filetype($allfiles, $attr->{'value'}, 'value');
1511: last;
1512: }
1513: }
1514: }
1515: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1516: foreach my $item (keys(%javafiles)) {
1517: if ($attr->{$item}) {
1518: $javafiles{$item} = $attr->{$item};
1519: last;
1520: }
1521: }
1522: foreach my $item (keys(%mediafiles)) {
1523: if ($attr->{$item}) {
1524: &add_filetype($allfiles,$attr->{$item},$item);
1525: last;
1526: }
1527: }
1528: }
1529: } elsif ($t->[0] eq 'E') {
1530: my ($tagname) = ($t->[1]);
1531: if ($javafiles{'codebase'} ne '') {
1532: $javafiles{'codebase'} .= '/';
1533: }
1534: if (lc($tagname) eq 'applet' ||
1535: lc($tagname) eq 'object' ||
1536: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1537: ) {
1538: foreach my $item (keys(%javafiles)) {
1539: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1540: my $file=$javafiles{'codebase'}.$javafiles{$item};
1541: &add_filetype($allfiles,$file,$item);
1542: }
1543: }
1544: }
1545: pop @state;
1546: }
1547: }
1548: return 'ok';
1549: }
1550:
1551: sub add_filetype {
1552: my ($allfiles,$file,$type)=@_;
1553: if (exists($allfiles->{$file})) {
1554: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1555: push(@{$allfiles->{$file}}, &escape($type));
1556: }
1557: } else {
1558: @{$allfiles->{$file}} = (&escape($type));
1559: }
1560: }
1561:
1562: sub removeuploadedurl {
1563: my ($url)=@_;
1564: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1565: return &removeuserfile($uname,$udom,$fname);
1566: }
1567:
1568: sub removeuserfile {
1569: my ($docuname,$docudom,$fname)=@_;
1570: my $home=&homeserver($docuname,$docudom);
1571: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1572: }
1573:
1574: sub mkdiruserfile {
1575: my ($docuname,$docudom,$dir)=@_;
1576: my $home=&homeserver($docuname,$docudom);
1577: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1578: }
1579:
1580: sub renameuserfile {
1581: my ($docuname,$docudom,$old,$new)=@_;
1582: my $home=&homeserver($docuname,$docudom);
1583: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1584: &escape("$new"),$home);
1585: }
1586:
1587: # ------------------------------------------------------------------------- Log
1588:
1589: sub log {
1590: my ($dom,$nam,$hom,$what)=@_;
1591: return critical("log:$dom:$nam:$what",$hom);
1592: }
1593:
1594: # ------------------------------------------------------------------ Course Log
1595: #
1596: # This routine flushes several buffers of non-mission-critical nature
1597: #
1598:
1599: sub flushcourselogs {
1600: &logthis('Flushing log buffers');
1601: #
1602: # course logs
1603: # This is a log of all transactions in a course, which can be used
1604: # for data mining purposes
1605: #
1606: # It also collects the courseid database, which lists last transaction
1607: # times and course titles for all courseids
1608: #
1609: my %courseidbuffer=();
1610: foreach (keys %courselogs) {
1611: my $crsid=$_;
1612: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1613: &escape($courselogs{$crsid}),
1614: $coursehombuf{$crsid}) eq 'ok') {
1615: delete $courselogs{$crsid};
1616: } else {
1617: &logthis('Failed to flush log buffer for '.$crsid);
1618: if (length($courselogs{$crsid})>40000) {
1619: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
1620: " exceeded maximum size, deleting.</font>");
1621: delete $courselogs{$crsid};
1622: }
1623: }
1624: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1625: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1626: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1627: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1628: } else {
1629: $courseidbuffer{$coursehombuf{$crsid}}=
1630: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1631: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1632: }
1633: }
1634: #
1635: # Write course id database (reverse lookup) to homeserver of courses
1636: # Is used in pickcourse
1637: #
1638: foreach (keys %courseidbuffer) {
1639: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1640: }
1641: #
1642: # File accesses
1643: # Writes to the dynamic metadata of resources to get hit counts, etc.
1644: #
1645: foreach my $entry (keys(%accesshash)) {
1646: if ($entry =~ /___count$/) {
1647: my ($dom,$name);
1648: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1649: if (! defined($dom) || $dom eq '' ||
1650: ! defined($name) || $name eq '') {
1651: my $cid = $env{'request.course.id'};
1652: $dom = $env{'request.'.$cid.'.domain'};
1653: $name = $env{'request.'.$cid.'.num'};
1654: }
1655: my $value = $accesshash{$entry};
1656: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1657: my %temphash=($url => $value);
1658: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1659: if ($result eq 'ok') {
1660: delete $accesshash{$entry};
1661: } elsif ($result eq 'unknown_cmd') {
1662: # Target server has old code running on it.
1663: my %temphash=($entry => $value);
1664: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1665: delete $accesshash{$entry};
1666: }
1667: }
1668: } else {
1669: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1670: my %temphash=($entry => $accesshash{$entry});
1671: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1672: delete $accesshash{$entry};
1673: }
1674: }
1675: }
1676: #
1677: # Roles
1678: # Reverse lookup of user roles for course faculty/staff and co-authorship
1679: #
1680: foreach (keys %userrolehash) {
1681: my $entry=$_;
1682: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1683: split(/\:/,$entry);
1684: if (&Apache::lonnet::put('nohist_userroles',
1685: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1686: $rudom,$runame) eq 'ok') {
1687: delete $userrolehash{$entry};
1688: }
1689: }
1690: #
1691: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1692: #
1693: my %domrolebuffer = ();
1694: foreach my $entry (keys %domainrolehash) {
1695: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1696: if ($domrolebuffer{$rudom}) {
1697: $domrolebuffer{$rudom}.='&'.&escape($entry).
1698: '='.&escape($domainrolehash{$entry});
1699: } else {
1700: $domrolebuffer{$rudom}.=&escape($entry).
1701: '='.&escape($domainrolehash{$entry});
1702: }
1703: delete $domainrolehash{$entry};
1704: }
1705: foreach my $dom (keys(%domrolebuffer)) {
1706: foreach my $tryserver (keys %libserv) {
1707: if ($hostdom{$tryserver} eq $dom) {
1708: unless (&reply('domroleput:'.$dom.':'.
1709: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1710: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1711: }
1712: }
1713: }
1714: }
1715: $dumpcount++;
1716: }
1717:
1718: sub courselog {
1719: my $what=shift;
1720: $what=time.':'.$what;
1721: unless ($env{'request.course.id'}) { return ''; }
1722: $coursedombuf{$env{'request.course.id'}}=
1723: $env{'course.'.$env{'request.course.id'}.'.domain'};
1724: $coursenumbuf{$env{'request.course.id'}}=
1725: $env{'course.'.$env{'request.course.id'}.'.num'};
1726: $coursehombuf{$env{'request.course.id'}}=
1727: $env{'course.'.$env{'request.course.id'}.'.home'};
1728: $coursedescrbuf{$env{'request.course.id'}}=
1729: $env{'course.'.$env{'request.course.id'}.'.description'};
1730: $courseinstcodebuf{$env{'request.course.id'}}=
1731: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1732: $courseownerbuf{$env{'request.course.id'}}=
1733: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1734: if (defined $courselogs{$env{'request.course.id'}}) {
1735: $courselogs{$env{'request.course.id'}}.='&'.$what;
1736: } else {
1737: $courselogs{$env{'request.course.id'}}.=$what;
1738: }
1739: if (length($courselogs{$env{'request.course.id'}})>4048) {
1740: &flushcourselogs();
1741: }
1742: }
1743:
1744: sub courseacclog {
1745: my $fnsymb=shift;
1746: unless ($env{'request.course.id'}) { return ''; }
1747: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1748: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1749: $what.=':POST';
1750: # FIXME: Probably ought to escape things....
1751: foreach (keys %env) {
1752: if ($_=~/^form\.(.*)/) {
1753: $what.=':'.$1.'='.$env{$_};
1754: }
1755: }
1756: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1757: # FIXME: We should not be depending on a form parameter that someone
1758: # editing lonsearchcat.pm might change in the future.
1759: if ($env{'form.phase'} eq 'course_search') {
1760: $what.= ':POST';
1761: # FIXME: Probably ought to escape things....
1762: foreach my $element ('courseexp','crsfulltext','crsrelated',
1763: 'crsdiscuss') {
1764: $what.=':'.$element.'='.$env{'form.'.$element};
1765: }
1766: }
1767: }
1768: &courselog($what);
1769: }
1770:
1771: sub countacc {
1772: my $url=&declutter(shift);
1773: return if (! defined($url) || $url eq '');
1774: unless ($env{'request.course.id'}) { return ''; }
1775: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1776: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1777: $accesshash{$key}++;
1778: }
1779:
1780: sub linklog {
1781: my ($from,$to)=@_;
1782: $from=&declutter($from);
1783: $to=&declutter($to);
1784: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1785: $accesshash{$to.'___'.$from.'___goto'}=1;
1786: }
1787:
1788: sub userrolelog {
1789: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1790: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
1791: ($trole=~/^in/) || ($trole=~/^cc/) ||
1792: ($trole=~/^ep/) || ($trole=~/^cr/) ||
1793: ($trole=~/^ta/)) {
1794: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1795: $userrolehash
1796: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1797: =$tend.':'.$tstart;
1798: }
1799: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
1800: ($trole=~/^li/) || ($trole=~/^li/) ||
1801: ($trole=~/^au/) || ($trole=~/^dg/) ||
1802: ($trole=~/^sc/)) {
1803: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1804: $domainrolehash
1805: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1806: = $tend.':'.$tstart;
1807: }
1808: }
1809:
1810: sub get_course_adv_roles {
1811: my $cid=shift;
1812: $cid=$env{'request.course.id'} unless (defined($cid));
1813: my %coursehash=&coursedescription($cid);
1814: my %nothide=();
1815: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1816: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1817: }
1818: my %returnhash=();
1819: my %dumphash=
1820: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1821: my $now=time;
1822: foreach (keys %dumphash) {
1823: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1824: if (($tstart) && ($tstart<0)) { next; }
1825: if (($tend) && ($tend<$now)) { next; }
1826: if (($tstart) && ($now<$tstart)) { next; }
1827: my ($role,$username,$domain,$section)=split(/\:/,$_);
1828: if ($username eq '' || $domain eq '') { next; }
1829: if ((&privileged($username,$domain)) &&
1830: (!$nothide{$username.':'.$domain})) { next; }
1831: if ($role eq 'cr') { next; }
1832: my $key=&plaintext($role);
1833: if ($role =~ /^cr/) {
1834: $key=(split('/',$role))[3];
1835: }
1836: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1837: if ($returnhash{$key}) {
1838: $returnhash{$key}.=','.$username.':'.$domain;
1839: } else {
1840: $returnhash{$key}=$username.':'.$domain;
1841: }
1842: }
1843: return %returnhash;
1844: }
1845:
1846: sub get_my_roles {
1847: my ($uname,$udom)=@_;
1848: unless (defined($uname)) { $uname=$env{'user.name'}; }
1849: unless (defined($udom)) { $udom=$env{'user.domain'}; }
1850: my %dumphash=
1851: &dump('nohist_userroles',$udom,$uname);
1852: my %returnhash=();
1853: my $now=time;
1854: foreach (keys %dumphash) {
1855: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1856: if (($tstart) && ($tstart<0)) { next; }
1857: if (($tend) && ($tend<$now)) { next; }
1858: if (($tstart) && ($now<$tstart)) { next; }
1859: my ($role,$username,$domain,$section)=split(/\:/,$_);
1860: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1861: }
1862: return %returnhash;
1863: }
1864:
1865: # ----------------------------------------------------- Frontpage Announcements
1866: #
1867: #
1868:
1869: sub postannounce {
1870: my ($server,$text)=@_;
1871: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1872: unless ($text=~/\w/) { $text=''; }
1873: return &reply('setannounce:'.&escape($text),$server);
1874: }
1875:
1876: sub getannounce {
1877:
1878: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1879: my $announcement='';
1880: while (<$fh>) { $announcement .=$_; }
1881: close($fh);
1882: if ($announcement=~/\w/) {
1883: return
1884: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1885: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1886: } else {
1887: return '';
1888: }
1889: } else {
1890: return '';
1891: }
1892: }
1893:
1894: # ---------------------------------------------------------- Course ID routines
1895: # Deal with domain's nohist_courseid.db files
1896: #
1897:
1898: sub courseidput {
1899: my ($domain,$what,$coursehome)=@_;
1900: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1901: }
1902:
1903: sub courseiddump {
1904: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref)=@_;
1905: my %returnhash=();
1906: unless ($domfilter) { $domfilter=''; }
1907: foreach my $tryserver (keys %libserv) {
1908: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1909: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1910: foreach (
1911: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1912: $sincefilter.':'.&escape($descfilter).':'.
1913: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter),
1914: $tryserver))) {
1915: my ($key,$value)=split(/\=/,$_);
1916: if (($key) && ($value)) {
1917: $returnhash{&unescape($key)}=$value;
1918: }
1919: }
1920: }
1921: }
1922: }
1923: return %returnhash;
1924: }
1925:
1926: # ---------------------------------------------------------- DC e-mail
1927:
1928: sub dcmailput {
1929: my ($domain,$msgid,$message,$server)=@_;
1930: my $status = &Apache::lonnet::critical(
1931: 'dcmailput:'.$domain.':'.&Apache::lonnet::escape($msgid).'='.
1932: &Apache::lonnet::escape($message),$server);
1933: return $status;
1934: }
1935:
1936: sub dcmaildump {
1937: my ($dom,$startdate,$enddate,$senders) = @_;
1938: my %returnhash=();
1939: if (exists($domain_primary{$dom})) {
1940: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
1941: &escape($enddate).':';
1942: my @esc_senders=map { &escape($_)} @$senders;
1943: $cmd.=&escape(join('&',@esc_senders));
1944: foreach (split(/\&/,&reply($cmd,$domain_primary{$dom}))) {
1945: my ($key,$value) = split(/\=/,$_);
1946: if (($key) && ($value)) {
1947: $returnhash{&unescape($key)} = &unescape($value);
1948: }
1949: }
1950: }
1951: return %returnhash;
1952: }
1953: # ---------------------------------------------------------- Domain roles
1954:
1955: sub get_domain_roles {
1956: my ($dom,$roles,$startdate,$enddate)=@_;
1957: if (undef($startdate) || $startdate eq '') {
1958: $startdate = '.';
1959: }
1960: if (undef($enddate) || $enddate eq '') {
1961: $enddate = '.';
1962: }
1963: my $rolelist = join(':',@{$roles});
1964: my %personnel = ();
1965: foreach my $tryserver (keys(%libserv)) {
1966: if ($hostdom{$tryserver} eq $dom) {
1967: %{$personnel{$tryserver}}=();
1968: foreach (
1969: split(/\&/,&reply('domrolesdump:'.$dom.':'.
1970: &escape($startdate).':'.&escape($enddate).':'.
1971: &escape($rolelist), $tryserver))) {
1972: my($key,$value) = split(/\=/,$_);
1973: if (($key) && ($value)) {
1974: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
1975: }
1976: }
1977: }
1978: }
1979: return %personnel;
1980: }
1981:
1982: # ----------------------------------------------------------- Check out an item
1983:
1984: sub get_first_access {
1985: my ($type,$argsymb)=@_;
1986: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1987: if ($argsymb) { $symb=$argsymb; }
1988: my ($map,$id,$res)=&decode_symb($symb);
1989: if ($type eq 'map') {
1990: $res=&symbread($map);
1991: } else {
1992: $res=$symb;
1993: }
1994: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
1995: return $times{"$courseid\0$res"};
1996: }
1997:
1998: sub set_first_access {
1999: my ($type)=@_;
2000: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2001: my ($map,$id,$res)=&decode_symb($symb);
2002: if ($type eq 'map') {
2003: $res=&symbread($map);
2004: } else {
2005: $res=$symb;
2006: }
2007: my $firstaccess=&get_first_access($type,$symb);
2008: if (!$firstaccess) {
2009: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
2010: }
2011: return 'already_set';
2012: }
2013:
2014: sub checkout {
2015: my ($symb,$tuname,$tudom,$tcrsid)=@_;
2016: my $now=time;
2017: my $lonhost=$perlvar{'lonHostID'};
2018: my $infostr=&escape(
2019: 'CHECKOUTTOKEN&'.
2020: $tuname.'&'.
2021: $tudom.'&'.
2022: $tcrsid.'&'.
2023: $symb.'&'.
2024: $now.'&'.$ENV{'REMOTE_ADDR'});
2025: my $token=&reply('tmpput:'.$infostr,$lonhost);
2026: if ($token=~/^error\:/) {
2027: &logthis("<font color=\"blue\">WARNING: ".
2028: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
2029: "</font>");
2030: return '';
2031: }
2032:
2033: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
2034: $token=~tr/a-z/A-Z/;
2035:
2036: my %infohash=('resource.0.outtoken' => $token,
2037: 'resource.0.checkouttime' => $now,
2038: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
2039:
2040: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2041: return '';
2042: } else {
2043: &logthis("<font color=\"blue\">WARNING: ".
2044: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
2045: "</font>");
2046: }
2047:
2048: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2049: &escape('Checkout '.$infostr.' - '.
2050: $token)) ne 'ok') {
2051: return '';
2052: } else {
2053: &logthis("<font color=\"blue\">WARNING: ".
2054: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
2055: "</font>");
2056: }
2057: return $token;
2058: }
2059:
2060: # ------------------------------------------------------------ Check in an item
2061:
2062: sub checkin {
2063: my $token=shift;
2064: my $now=time;
2065: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2066: $lonhost=~tr/A-Z/a-z/;
2067: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
2068: $dtoken=~s/\W/\_/g;
2069: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2070: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2071:
2072: unless (($tuname) && ($tudom)) {
2073: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2074: return '';
2075: }
2076:
2077: unless (&allowed('mgr',$tcrsid)) {
2078: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2079: $env{'user.name'}.' - '.$env{'user.domain'});
2080: return '';
2081: }
2082:
2083: my %infohash=('resource.0.intoken' => $token,
2084: 'resource.0.checkintime' => $now,
2085: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2086:
2087: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2088: return '';
2089: }
2090:
2091: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2092: &escape('Checkin - '.$token)) ne 'ok') {
2093: return '';
2094: }
2095:
2096: return ($symb,$tuname,$tudom,$tcrsid);
2097: }
2098:
2099: # --------------------------------------------- Set Expire Date for Spreadsheet
2100:
2101: sub expirespread {
2102: my ($uname,$udom,$stype,$usymb)=@_;
2103: my $cid=$env{'request.course.id'};
2104: if ($cid) {
2105: my $now=time;
2106: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2107: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2108: $env{'course.'.$cid.'.num'}.
2109: ':nohist_expirationdates:'.
2110: &escape($key).'='.$now,
2111: $env{'course.'.$cid.'.home'})
2112: }
2113: return 'ok';
2114: }
2115:
2116: # ----------------------------------------------------- Devalidate Spreadsheets
2117:
2118: sub devalidate {
2119: my ($symb,$uname,$udom)=@_;
2120: my $cid=$env{'request.course.id'};
2121: if ($cid) {
2122: # delete the stored spreadsheets for
2123: # - the student level sheet of this user in course's homespace
2124: # - the assessment level sheet for this resource
2125: # for this user in user's homespace
2126: # - current conditional state info
2127: my $key=$uname.':'.$udom.':';
2128: my $status=
2129: &del('nohist_calculatedsheets',
2130: [$key.'studentcalc:'],
2131: $env{'course.'.$cid.'.domain'},
2132: $env{'course.'.$cid.'.num'})
2133: .' '.
2134: &del('nohist_calculatedsheets_'.$cid,
2135: [$key.'assesscalc:'.$symb],$udom,$uname);
2136: unless ($status eq 'ok ok') {
2137: &logthis('Could not devalidate spreadsheet '.
2138: $uname.' at '.$udom.' for '.
2139: $symb.': '.$status);
2140: }
2141: &delenv('user.state.'.$cid);
2142: }
2143: }
2144:
2145: sub get_scalar {
2146: my ($string,$end) = @_;
2147: my $value;
2148: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2149: $value = $1;
2150: } elsif ($$string =~ s/^([^&]*?)&//) {
2151: $value = $1;
2152: }
2153: return &unescape($value);
2154: }
2155:
2156: sub array2str {
2157: my (@array) = @_;
2158: my $result=&arrayref2str(\@array);
2159: $result=~s/^__ARRAY_REF__//;
2160: $result=~s/__END_ARRAY_REF__$//;
2161: return $result;
2162: }
2163:
2164: sub arrayref2str {
2165: my ($arrayref) = @_;
2166: my $result='__ARRAY_REF__';
2167: foreach my $elem (@$arrayref) {
2168: if(ref($elem) eq 'ARRAY') {
2169: $result.=&arrayref2str($elem).'&';
2170: } elsif(ref($elem) eq 'HASH') {
2171: $result.=&hashref2str($elem).'&';
2172: } elsif(ref($elem)) {
2173: #print("Got a ref of ".(ref($elem))." skipping.");
2174: } else {
2175: $result.=&escape($elem).'&';
2176: }
2177: }
2178: $result=~s/\&$//;
2179: $result .= '__END_ARRAY_REF__';
2180: return $result;
2181: }
2182:
2183: sub hash2str {
2184: my (%hash) = @_;
2185: my $result=&hashref2str(\%hash);
2186: $result=~s/^__HASH_REF__//;
2187: $result=~s/__END_HASH_REF__$//;
2188: return $result;
2189: }
2190:
2191: sub hashref2str {
2192: my ($hashref)=@_;
2193: my $result='__HASH_REF__';
2194: foreach (sort(keys(%$hashref))) {
2195: if (ref($_) eq 'ARRAY') {
2196: $result.=&arrayref2str($_).'=';
2197: } elsif (ref($_) eq 'HASH') {
2198: $result.=&hashref2str($_).'=';
2199: } elsif (ref($_)) {
2200: $result.='=';
2201: #print("Got a ref of ".(ref($_))." skipping.");
2202: } else {
2203: if ($_) {$result.=&escape($_).'=';} else { last; }
2204: }
2205:
2206: if(ref($hashref->{$_}) eq 'ARRAY') {
2207: $result.=&arrayref2str($hashref->{$_}).'&';
2208: } elsif(ref($hashref->{$_}) eq 'HASH') {
2209: $result.=&hashref2str($hashref->{$_}).'&';
2210: } elsif(ref($hashref->{$_})) {
2211: $result.='&';
2212: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
2213: } else {
2214: $result.=&escape($hashref->{$_}).'&';
2215: }
2216: }
2217: $result=~s/\&$//;
2218: $result .= '__END_HASH_REF__';
2219: return $result;
2220: }
2221:
2222: sub str2hash {
2223: my ($string)=@_;
2224: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2225: return %$hash;
2226: }
2227:
2228: sub str2hashref {
2229: my ($string) = @_;
2230:
2231: my %hash;
2232:
2233: if($string !~ /^__HASH_REF__/) {
2234: if (! ($string eq '' || !defined($string))) {
2235: $hash{'error'}='Not hash reference';
2236: }
2237: return (\%hash, $string);
2238: }
2239:
2240: $string =~ s/^__HASH_REF__//;
2241:
2242: while($string !~ /^__END_HASH_REF__/) {
2243: #key
2244: my $key='';
2245: if($string =~ /^__HASH_REF__/) {
2246: ($key, $string)=&str2hashref($string);
2247: if(defined($key->{'error'})) {
2248: $hash{'error'}='Bad data';
2249: return (\%hash, $string);
2250: }
2251: } elsif($string =~ /^__ARRAY_REF__/) {
2252: ($key, $string)=&str2arrayref($string);
2253: if($key->[0] eq 'Array reference error') {
2254: $hash{'error'}='Bad data';
2255: return (\%hash, $string);
2256: }
2257: } else {
2258: $string =~ s/^(.*?)=//;
2259: $key=&unescape($1);
2260: }
2261: $string =~ s/^=//;
2262:
2263: #value
2264: my $value='';
2265: if($string =~ /^__HASH_REF__/) {
2266: ($value, $string)=&str2hashref($string);
2267: if(defined($value->{'error'})) {
2268: $hash{'error'}='Bad data';
2269: return (\%hash, $string);
2270: }
2271: } elsif($string =~ /^__ARRAY_REF__/) {
2272: ($value, $string)=&str2arrayref($string);
2273: if($value->[0] eq 'Array reference error') {
2274: $hash{'error'}='Bad data';
2275: return (\%hash, $string);
2276: }
2277: } else {
2278: $value=&get_scalar(\$string,'__END_HASH_REF__');
2279: }
2280: $string =~ s/^&//;
2281:
2282: $hash{$key}=$value;
2283: }
2284:
2285: $string =~ s/^__END_HASH_REF__//;
2286:
2287: return (\%hash, $string);
2288: }
2289:
2290: sub str2array {
2291: my ($string)=@_;
2292: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2293: return @$array;
2294: }
2295:
2296: sub str2arrayref {
2297: my ($string) = @_;
2298: my @array;
2299:
2300: if($string !~ /^__ARRAY_REF__/) {
2301: if (! ($string eq '' || !defined($string))) {
2302: $array[0]='Array reference error';
2303: }
2304: return (\@array, $string);
2305: }
2306:
2307: $string =~ s/^__ARRAY_REF__//;
2308:
2309: while($string !~ /^__END_ARRAY_REF__/) {
2310: my $value='';
2311: if($string =~ /^__HASH_REF__/) {
2312: ($value, $string)=&str2hashref($string);
2313: if(defined($value->{'error'})) {
2314: $array[0] ='Array reference error';
2315: return (\@array, $string);
2316: }
2317: } elsif($string =~ /^__ARRAY_REF__/) {
2318: ($value, $string)=&str2arrayref($string);
2319: if($value->[0] eq 'Array reference error') {
2320: $array[0] ='Array reference error';
2321: return (\@array, $string);
2322: }
2323: } else {
2324: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2325: }
2326: $string =~ s/^&//;
2327:
2328: push(@array, $value);
2329: }
2330:
2331: $string =~ s/^__END_ARRAY_REF__//;
2332:
2333: return (\@array, $string);
2334: }
2335:
2336: # -------------------------------------------------------------------Temp Store
2337:
2338: sub tmpreset {
2339: my ($symb,$namespace,$domain,$stuname) = @_;
2340: if (!$symb) {
2341: $symb=&symbread();
2342: if (!$symb) { $symb= $env{'request.url'}; }
2343: }
2344: $symb=escape($symb);
2345:
2346: if (!$namespace) { $namespace=$env{'request.state'}; }
2347: $namespace=~s/\//\_/g;
2348: $namespace=~s/\W//g;
2349:
2350: if (!$domain) { $domain=$env{'user.domain'}; }
2351: if (!$stuname) { $stuname=$env{'user.name'}; }
2352: if ($domain eq 'public' && $stuname eq 'public') {
2353: $stuname=$ENV{'REMOTE_ADDR'};
2354: }
2355: my $path=$perlvar{'lonDaemons'}.'/tmp';
2356: my %hash;
2357: if (tie(%hash,'GDBM_File',
2358: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2359: &GDBM_WRCREAT(),0640)) {
2360: foreach my $key (keys %hash) {
2361: if ($key=~ /:$symb/) {
2362: delete($hash{$key});
2363: }
2364: }
2365: }
2366: }
2367:
2368: sub tmpstore {
2369: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2370:
2371: if (!$symb) {
2372: $symb=&symbread();
2373: if (!$symb) { $symb= $env{'request.url'}; }
2374: }
2375: $symb=escape($symb);
2376:
2377: if (!$namespace) {
2378: # I don't think we would ever want to store this for a course.
2379: # it seems this will only be used if we don't have a course.
2380: #$namespace=$env{'request.course.id'};
2381: #if (!$namespace) {
2382: $namespace=$env{'request.state'};
2383: #}
2384: }
2385: $namespace=~s/\//\_/g;
2386: $namespace=~s/\W//g;
2387: if (!$domain) { $domain=$env{'user.domain'}; }
2388: if (!$stuname) { $stuname=$env{'user.name'}; }
2389: if ($domain eq 'public' && $stuname eq 'public') {
2390: $stuname=$ENV{'REMOTE_ADDR'};
2391: }
2392: my $now=time;
2393: my %hash;
2394: my $path=$perlvar{'lonDaemons'}.'/tmp';
2395: if (tie(%hash,'GDBM_File',
2396: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2397: &GDBM_WRCREAT(),0640)) {
2398: $hash{"version:$symb"}++;
2399: my $version=$hash{"version:$symb"};
2400: my $allkeys='';
2401: foreach my $key (keys(%$storehash)) {
2402: $allkeys.=$key.':';
2403: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2404: }
2405: $hash{"$version:$symb:timestamp"}=$now;
2406: $allkeys.='timestamp';
2407: $hash{"$version:keys:$symb"}=$allkeys;
2408: if (untie(%hash)) {
2409: return 'ok';
2410: } else {
2411: return "error:$!";
2412: }
2413: } else {
2414: return "error:$!";
2415: }
2416: }
2417:
2418: # -----------------------------------------------------------------Temp Restore
2419:
2420: sub tmprestore {
2421: my ($symb,$namespace,$domain,$stuname) = @_;
2422:
2423: if (!$symb) {
2424: $symb=&symbread();
2425: if (!$symb) { $symb= $env{'request.url'}; }
2426: }
2427: $symb=escape($symb);
2428:
2429: if (!$namespace) { $namespace=$env{'request.state'}; }
2430:
2431: if (!$domain) { $domain=$env{'user.domain'}; }
2432: if (!$stuname) { $stuname=$env{'user.name'}; }
2433: if ($domain eq 'public' && $stuname eq 'public') {
2434: $stuname=$ENV{'REMOTE_ADDR'};
2435: }
2436: my %returnhash;
2437: $namespace=~s/\//\_/g;
2438: $namespace=~s/\W//g;
2439: my %hash;
2440: my $path=$perlvar{'lonDaemons'}.'/tmp';
2441: if (tie(%hash,'GDBM_File',
2442: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2443: &GDBM_READER(),0640)) {
2444: my $version=$hash{"version:$symb"};
2445: $returnhash{'version'}=$version;
2446: my $scope;
2447: for ($scope=1;$scope<=$version;$scope++) {
2448: my $vkeys=$hash{"$scope:keys:$symb"};
2449: my @keys=split(/:/,$vkeys);
2450: my $key;
2451: $returnhash{"$scope:keys"}=$vkeys;
2452: foreach $key (@keys) {
2453: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2454: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2455: }
2456: }
2457: if (!(untie(%hash))) {
2458: return "error:$!";
2459: }
2460: } else {
2461: return "error:$!";
2462: }
2463: return %returnhash;
2464: }
2465:
2466: # ----------------------------------------------------------------------- Store
2467:
2468: sub store {
2469: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2470: my $home='';
2471:
2472: if ($stuname) { $home=&homeserver($stuname,$domain); }
2473:
2474: $symb=&symbclean($symb);
2475: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2476:
2477: if (!$domain) { $domain=$env{'user.domain'}; }
2478: if (!$stuname) { $stuname=$env{'user.name'}; }
2479:
2480: &devalidate($symb,$stuname,$domain);
2481:
2482: $symb=escape($symb);
2483: if (!$namespace) {
2484: unless ($namespace=$env{'request.course.id'}) {
2485: return '';
2486: }
2487: }
2488: if (!$home) { $home=$env{'user.home'}; }
2489:
2490: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2491: $$storehash{'host'}=$perlvar{'lonHostID'};
2492:
2493: my $namevalue='';
2494: foreach (keys %$storehash) {
2495: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2496: }
2497: $namevalue=~s/\&$//;
2498: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2499: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2500: }
2501:
2502: # -------------------------------------------------------------- Critical Store
2503:
2504: sub cstore {
2505: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2506: my $home='';
2507:
2508: if ($stuname) { $home=&homeserver($stuname,$domain); }
2509:
2510: $symb=&symbclean($symb);
2511: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2512:
2513: if (!$domain) { $domain=$env{'user.domain'}; }
2514: if (!$stuname) { $stuname=$env{'user.name'}; }
2515:
2516: &devalidate($symb,$stuname,$domain);
2517:
2518: $symb=escape($symb);
2519: if (!$namespace) {
2520: unless ($namespace=$env{'request.course.id'}) {
2521: return '';
2522: }
2523: }
2524: if (!$home) { $home=$env{'user.home'}; }
2525:
2526: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2527: $$storehash{'host'}=$perlvar{'lonHostID'};
2528:
2529: my $namevalue='';
2530: foreach (keys %$storehash) {
2531: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2532: }
2533: $namevalue=~s/\&$//;
2534: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2535: return critical
2536: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2537: }
2538:
2539: # --------------------------------------------------------------------- Restore
2540:
2541: sub restore {
2542: my ($symb,$namespace,$domain,$stuname) = @_;
2543: my $home='';
2544:
2545: if ($stuname) { $home=&homeserver($stuname,$domain); }
2546:
2547: if (!$symb) {
2548: unless ($symb=escape(&symbread())) { return ''; }
2549: } else {
2550: $symb=&escape(&symbclean($symb));
2551: }
2552: if (!$namespace) {
2553: unless ($namespace=$env{'request.course.id'}) {
2554: return '';
2555: }
2556: }
2557: if (!$domain) { $domain=$env{'user.domain'}; }
2558: if (!$stuname) { $stuname=$env{'user.name'}; }
2559: if (!$home) { $home=$env{'user.home'}; }
2560: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2561:
2562: my %returnhash=();
2563: foreach (split(/\&/,$answer)) {
2564: my ($name,$value)=split(/\=/,$_);
2565: $returnhash{&unescape($name)}=&thaw_unescape($value);
2566: }
2567: my $version;
2568: for ($version=1;$version<=$returnhash{'version'};$version++) {
2569: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2570: $returnhash{$_}=$returnhash{$version.':'.$_};
2571: }
2572: }
2573: return %returnhash;
2574: }
2575:
2576: # ---------------------------------------------------------- Course Description
2577:
2578: sub coursedescription {
2579: my $courseid=shift;
2580: $courseid=~s/^\///;
2581: $courseid=~s/\_/\//g;
2582: my ($cdomain,$cnum)=split(/\//,$courseid);
2583: my $chome=&homeserver($cnum,$cdomain);
2584: my $normalid=$cdomain.'_'.$cnum;
2585: # need to always cache even if we get errors otherwise we keep
2586: # trying and trying and trying to get the course description.
2587: my %envhash=();
2588: my %returnhash=();
2589: $envhash{'course.'.$normalid.'.last_cache'}=time;
2590: if ($chome ne 'no_host') {
2591: %returnhash=&dump('environment',$cdomain,$cnum);
2592: if (!exists($returnhash{'con_lost'})) {
2593: $returnhash{'home'}= $chome;
2594: $returnhash{'domain'} = $cdomain;
2595: $returnhash{'num'} = $cnum;
2596: while (my ($name,$value) = each %returnhash) {
2597: $envhash{'course.'.$normalid.'.'.$name}=$value;
2598: }
2599: $returnhash{'url'}=&clutter($returnhash{'url'});
2600: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2601: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2602: $envhash{'course.'.$normalid.'.home'}=$chome;
2603: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2604: $envhash{'course.'.$normalid.'.num'}=$cnum;
2605: }
2606: }
2607: &appenv(%envhash);
2608: return %returnhash;
2609: }
2610:
2611: # -------------------------------------------------See if a user is privileged
2612:
2613: sub privileged {
2614: my ($username,$domain)=@_;
2615: my $rolesdump=&reply("dump:$domain:$username:roles",
2616: &homeserver($username,$domain));
2617: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2618: my $now=time;
2619: if ($rolesdump ne '') {
2620: foreach (split(/&/,$rolesdump)) {
2621: if ($_!~/^rolesdef_/) {
2622: my ($area,$role)=split(/=/,$_);
2623: $area=~s/\_\w\w$//;
2624: my ($trole,$tend,$tstart)=split(/_/,$role);
2625: if (($trole eq 'dc') || ($trole eq 'su')) {
2626: my $active=1;
2627: if ($tend) {
2628: if ($tend<$now) { $active=0; }
2629: }
2630: if ($tstart) {
2631: if ($tstart>$now) { $active=0; }
2632: }
2633: if ($active) { return 1; }
2634: }
2635: }
2636: }
2637: }
2638: return 0;
2639: }
2640:
2641: # -------------------------------------------------------- Get user privileges
2642:
2643: sub rolesinit {
2644: my ($domain,$username,$authhost)=@_;
2645: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2646: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2647: my %allroles=();
2648: my %allgroups=();
2649: my $now=time;
2650: my $userroles="user.login.time=$now\n";
2651: my $group_privs;
2652:
2653: if ($rolesdump ne '') {
2654: foreach (split(/&/,$rolesdump)) {
2655: if ($_!~/^rolesdef_/) {
2656: my ($area,$role)=split(/=/,$_);
2657: $area=~s/\_\w\w$//;
2658: my ($trole,$tend,$tstart,$group_privs);
2659: if ($role=~/^cr/) {
2660: if ($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|) {
2661: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2662: ($tend,$tstart)=split('_',$trest);
2663: } else {
2664: $trole=$role;
2665: }
2666: } elsif ($role =~ m|^gr/|) {
2667: ($trole,$tend,$tstart) = split(/_/,$role);
2668: ($trole,$group_privs) = split(/\//,$trole);
2669: $group_privs = &unescape($group_privs);
2670: } else {
2671: ($trole,$tend,$tstart)=split(/_/,$role);
2672: }
2673: $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username);
2674: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2675: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2676: if (($area ne '') && ($trole ne '')) {
2677: my $spec=$trole.'.'.$area;
2678: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2679: if ($trole =~ /^cr\//) {
2680: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2681: } elsif ($trole eq 'gr') {
2682: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
2683: } else {
2684: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2685: }
2686: }
2687: }
2688: }
2689: my ($author,$adv) = &set_userprivs(\$userroles,\%allroles,\%allgroups);
2690: $userroles.='user.adv='.$adv."\n".
2691: 'user.author='.$author."\n";
2692: $env{'user.adv'}=$adv;
2693: }
2694: return $userroles;
2695: }
2696:
2697: sub set_arearole {
2698: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2699: # log the associated role with the area
2700: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2701: return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
2702: }
2703:
2704: sub custom_roleprivs {
2705: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2706: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2707: my $homsvr=homeserver($rauthor,$rdomain);
2708: if ($hostname{$homsvr} ne '') {
2709: my ($rdummy,$roledef)=
2710: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2711: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2712: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2713: if (defined($syspriv)) {
2714: $$allroles{'cm./'}.=':'.$syspriv;
2715: $$allroles{$spec.'./'}.=':'.$syspriv;
2716: }
2717: if ($tdomain ne '') {
2718: if (defined($dompriv)) {
2719: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2720: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2721: }
2722: if (($trest ne '') && (defined($coursepriv))) {
2723: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2724: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2725: }
2726: }
2727: }
2728: }
2729: }
2730:
2731: sub group_roleprivs {
2732: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
2733: my $access = 1;
2734: my $now = time;
2735: if (($tend!=0) && ($tend<$now)) { $access = 0; }
2736: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
2737: if ($access) {
2738: my ($course,$group) = ($area =~ m|(/\w+/\w+)/([^/]+)$|);
2739: $$allgroups{$course}{$group} .=':'.$group_privs;
2740: }
2741: }
2742:
2743: sub standard_roleprivs {
2744: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2745: if (defined($pr{$trole.':s'})) {
2746: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2747: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2748: }
2749: if ($tdomain ne '') {
2750: if (defined($pr{$trole.':d'})) {
2751: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2752: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2753: }
2754: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2755: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2756: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2757: }
2758: }
2759: }
2760:
2761: sub set_userprivs {
2762: my ($userroles,$allroles,$allgroups) = @_;
2763: my $author=0;
2764: my $adv=0;
2765: my %grouproles = ();
2766: if (keys(%{$allgroups}) > 0) {
2767: foreach my $role (keys %{$allroles}) {
2768: my ($trole,$area,$sec,$extendedarea);
2769: if ($role =~ m|^(\w+)\.(/\w+/\w+)(/?\w*)|) {
2770: $trole = $1;
2771: $area = $2;
2772: $sec = $3;
2773: $extendedarea = $area.$sec;
2774: if (exists($$allgroups{$area})) {
2775: foreach my $group (keys(%{$$allgroups{$area}})) {
2776: my $spec = $trole.'.'.$extendedarea;
2777: $grouproles{$spec.'.'.$area.'/'.$group} =
2778: $$allgroups{$area}{$group};
2779: }
2780: }
2781: }
2782: }
2783: }
2784: foreach (keys(%grouproles)) {
2785: $$allroles{$_} = $grouproles{$_};
2786: }
2787: foreach (keys %{$allroles}) {
2788: my %thesepriv=();
2789: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2790: foreach (split(/:/,$$allroles{$_})) {
2791: if ($_ ne '') {
2792: my ($privilege,$restrictions)=split(/&/,$_);
2793: if ($restrictions eq '') {
2794: $thesepriv{$privilege}='F';
2795: } elsif ($thesepriv{$privilege} ne 'F') {
2796: $thesepriv{$privilege}.=$restrictions;
2797: }
2798: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2799: }
2800: }
2801: my $thesestr='';
2802: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2803: $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
2804: }
2805: return ($author,$adv);
2806: }
2807:
2808: # --------------------------------------------------------------- get interface
2809:
2810: sub get {
2811: my ($namespace,$storearr,$udomain,$uname)=@_;
2812: my $items='';
2813: foreach (@$storearr) {
2814: $items.=escape($_).'&';
2815: }
2816: $items=~s/\&$//;
2817: if (!$udomain) { $udomain=$env{'user.domain'}; }
2818: if (!$uname) { $uname=$env{'user.name'}; }
2819: my $uhome=&homeserver($uname,$udomain);
2820:
2821: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2822: my @pairs=split(/\&/,$rep);
2823: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2824: return @pairs;
2825: }
2826: my %returnhash=();
2827: my $i=0;
2828: foreach (@$storearr) {
2829: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2830: $i++;
2831: }
2832: return %returnhash;
2833: }
2834:
2835: # --------------------------------------------------------------- del interface
2836:
2837: sub del {
2838: my ($namespace,$storearr,$udomain,$uname)=@_;
2839: my $items='';
2840: foreach (@$storearr) {
2841: $items.=escape($_).'&';
2842: }
2843: $items=~s/\&$//;
2844: if (!$udomain) { $udomain=$env{'user.domain'}; }
2845: if (!$uname) { $uname=$env{'user.name'}; }
2846: my $uhome=&homeserver($uname,$udomain);
2847:
2848: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2849: }
2850:
2851: # -------------------------------------------------------------- dump interface
2852:
2853: sub dump {
2854: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2855: if (!$udomain) { $udomain=$env{'user.domain'}; }
2856: if (!$uname) { $uname=$env{'user.name'}; }
2857: my $uhome=&homeserver($uname,$udomain);
2858: if ($regexp) {
2859: $regexp=&escape($regexp);
2860: } else {
2861: $regexp='.';
2862: }
2863: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
2864: my @pairs=split(/\&/,$rep);
2865: my %returnhash=();
2866: foreach (@pairs) {
2867: my ($key,$value)=split(/=/,$_,2);
2868: $returnhash{unescape($key)}=&thaw_unescape($value);
2869: }
2870: return %returnhash;
2871: }
2872:
2873: # --------------------------------------------------------- dumpstore interface
2874:
2875: sub dumpstore {
2876: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2877: return &dump($namespace,$udomain,$uname,$regexp,$range);
2878: }
2879:
2880: # -------------------------------------------------------------- keys interface
2881:
2882: sub getkeys {
2883: my ($namespace,$udomain,$uname)=@_;
2884: if (!$udomain) { $udomain=$env{'user.domain'}; }
2885: if (!$uname) { $uname=$env{'user.name'}; }
2886: my $uhome=&homeserver($uname,$udomain);
2887: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2888: my @keyarray=();
2889: foreach (split(/\&/,$rep)) {
2890: push (@keyarray,&unescape($_));
2891: }
2892: return @keyarray;
2893: }
2894:
2895: # --------------------------------------------------------------- currentdump
2896: sub currentdump {
2897: my ($courseid,$sdom,$sname)=@_;
2898: $courseid = $env{'request.course.id'} if (! defined($courseid));
2899: $sdom = $env{'user.domain'} if (! defined($sdom));
2900: $sname = $env{'user.name'} if (! defined($sname));
2901: my $uhome = &homeserver($sname,$sdom);
2902: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2903: return if ($rep =~ /^(error:|no_such_host)/);
2904: #
2905: my %returnhash=();
2906: #
2907: if ($rep eq "unknown_cmd") {
2908: # an old lond will not know currentdump
2909: # Do a dump and make it look like a currentdump
2910: my @tmp = &dump($courseid,$sdom,$sname,'.');
2911: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2912: my %hash = @tmp;
2913: @tmp=();
2914: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2915: } else {
2916: my @pairs=split(/\&/,$rep);
2917: foreach (@pairs) {
2918: my ($key,$value)=split(/=/,$_);
2919: my ($symb,$param) = split(/:/,$key);
2920: $returnhash{&unescape($symb)}->{&unescape($param)} =
2921: &thaw_unescape($value);
2922: }
2923: }
2924: return %returnhash;
2925: }
2926:
2927: sub convert_dump_to_currentdump{
2928: my %hash = %{shift()};
2929: my %returnhash;
2930: # Code ripped from lond, essentially. The only difference
2931: # here is the unescaping done by lonnet::dump(). Conceivably
2932: # we might run in to problems with parameter names =~ /^v\./
2933: while (my ($key,$value) = each(%hash)) {
2934: my ($v,$symb,$param) = split(/:/,$key);
2935: next if ($v eq 'version' || $symb eq 'keys');
2936: next if (exists($returnhash{$symb}) &&
2937: exists($returnhash{$symb}->{$param}) &&
2938: $returnhash{$symb}->{'v.'.$param} > $v);
2939: $returnhash{$symb}->{$param}=$value;
2940: $returnhash{$symb}->{'v.'.$param}=$v;
2941: }
2942: #
2943: # Remove all of the keys in the hashes which keep track of
2944: # the version of the parameter.
2945: while (my ($symb,$param_hash) = each(%returnhash)) {
2946: # use a foreach because we are going to delete from the hash.
2947: foreach my $key (keys(%$param_hash)) {
2948: delete($param_hash->{$key}) if ($key =~ /^v\./);
2949: }
2950: }
2951: return \%returnhash;
2952: }
2953:
2954: # ------------------------------------------------------ critical inc interface
2955:
2956: sub cinc {
2957: return &inc(@_,'critical');
2958: }
2959:
2960: # --------------------------------------------------------------- inc interface
2961:
2962: sub inc {
2963: my ($namespace,$store,$udomain,$uname,$critical) = @_;
2964: if (!$udomain) { $udomain=$env{'user.domain'}; }
2965: if (!$uname) { $uname=$env{'user.name'}; }
2966: my $uhome=&homeserver($uname,$udomain);
2967: my $items='';
2968: if (! ref($store)) {
2969: # got a single value, so use that instead
2970: $items = &escape($store).'=&';
2971: } elsif (ref($store) eq 'SCALAR') {
2972: $items = &escape($$store).'=&';
2973: } elsif (ref($store) eq 'ARRAY') {
2974: $items = join('=&',map {&escape($_);} @{$store});
2975: } elsif (ref($store) eq 'HASH') {
2976: while (my($key,$value) = each(%{$store})) {
2977: $items.= &escape($key).'='.&escape($value).'&';
2978: }
2979: }
2980: $items=~s/\&$//;
2981: if ($critical) {
2982: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
2983: } else {
2984: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2985: }
2986: }
2987:
2988: # --------------------------------------------------------------- put interface
2989:
2990: sub put {
2991: my ($namespace,$storehash,$udomain,$uname)=@_;
2992: if (!$udomain) { $udomain=$env{'user.domain'}; }
2993: if (!$uname) { $uname=$env{'user.name'}; }
2994: my $uhome=&homeserver($uname,$udomain);
2995: my $items='';
2996: foreach (keys %$storehash) {
2997: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2998: }
2999: $items=~s/\&$//;
3000: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3001: }
3002:
3003: # ------------------------------------------------------------ newput interface
3004:
3005: sub newput {
3006: my ($namespace,$storehash,$udomain,$uname)=@_;
3007: if (!$udomain) { $udomain=$env{'user.domain'}; }
3008: if (!$uname) { $uname=$env{'user.name'}; }
3009: my $uhome=&homeserver($uname,$udomain);
3010: my $items='';
3011: foreach my $key (keys(%$storehash)) {
3012: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3013: }
3014: $items=~s/\&$//;
3015: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
3016: }
3017:
3018: # --------------------------------------------------------- putstore interface
3019:
3020: sub putstore {
3021: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3022: if (!$udomain) { $udomain=$env{'user.domain'}; }
3023: if (!$uname) { $uname=$env{'user.name'}; }
3024: my $uhome=&homeserver($uname,$udomain);
3025: my $items='';
3026: foreach my $key (keys(%$storehash)) {
3027: $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
3028: }
3029: $items=~s/\&$//;
3030: my $esc_symb=&escape($symb);
3031: my $esc_v=&escape($version);
3032: my $reply =
3033: &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
3034: $uhome);
3035: if ($reply eq 'unknown_cmd') {
3036: # gfall back to way things use to be done
3037: return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
3038: $uname);
3039: }
3040: return $reply;
3041: }
3042:
3043: sub old_putstore {
3044: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3045: if (!$udomain) { $udomain=$env{'user.domain'}; }
3046: if (!$uname) { $uname=$env{'user.name'}; }
3047: my $uhome=&homeserver($uname,$udomain);
3048: my %newstorehash;
3049: foreach (keys %$storehash) {
3050: my $key = $version.':'.&escape($symb).':'.$_;
3051: $newstorehash{$key} = $storehash->{$_};
3052: }
3053: my $items='';
3054: my %allitems = ();
3055: foreach (keys %newstorehash) {
3056: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
3057: my $key = $1.':keys:'.$2;
3058: $allitems{$key} .= $3.':';
3059: }
3060: $items.=$_.'='.&freeze_escape($newstorehash{$_}).'&';
3061: }
3062: foreach (keys %allitems) {
3063: $allitems{$_} =~ s/\:$//;
3064: $items.= $_.'='.$allitems{$_}.'&';
3065: }
3066: $items=~s/\&$//;
3067: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3068: }
3069:
3070: # ------------------------------------------------------ critical put interface
3071:
3072: sub cput {
3073: my ($namespace,$storehash,$udomain,$uname)=@_;
3074: if (!$udomain) { $udomain=$env{'user.domain'}; }
3075: if (!$uname) { $uname=$env{'user.name'}; }
3076: my $uhome=&homeserver($uname,$udomain);
3077: my $items='';
3078: foreach (keys %$storehash) {
3079: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3080: }
3081: $items=~s/\&$//;
3082: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
3083: }
3084:
3085: # -------------------------------------------------------------- eget interface
3086:
3087: sub eget {
3088: my ($namespace,$storearr,$udomain,$uname)=@_;
3089: my $items='';
3090: foreach (@$storearr) {
3091: $items.=escape($_).'&';
3092: }
3093: $items=~s/\&$//;
3094: if (!$udomain) { $udomain=$env{'user.domain'}; }
3095: if (!$uname) { $uname=$env{'user.name'}; }
3096: my $uhome=&homeserver($uname,$udomain);
3097: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3098: my @pairs=split(/\&/,$rep);
3099: my %returnhash=();
3100: my $i=0;
3101: foreach (@$storearr) {
3102: $returnhash{$_}=&thaw_unescape($pairs[$i]);
3103: $i++;
3104: }
3105: return %returnhash;
3106: }
3107:
3108: # ------------------------------------------------------------ tmpput interface
3109: sub tmpput {
3110: my ($storehash,$server)=@_;
3111: my $items='';
3112: foreach (keys(%$storehash)) {
3113: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3114: }
3115: $items=~s/\&$//;
3116: return &reply("tmpput:$items",$server);
3117: }
3118:
3119: # ------------------------------------------------------------ tmpget interface
3120: sub tmpget {
3121: my ($token,$server)=@_;
3122: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3123: my $rep=&reply("tmpget:$token",$server);
3124: my %returnhash;
3125: foreach my $item (split(/\&/,$rep)) {
3126: my ($key,$value)=split(/=/,$item);
3127: $returnhash{&unescape($key)}=&thaw_unescape($value);
3128: }
3129: return %returnhash;
3130: }
3131:
3132: # ------------------------------------------------------------ tmpget interface
3133: sub tmpdel {
3134: my ($token,$server)=@_;
3135: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3136: return &reply("tmpdel:$token",$server);
3137: }
3138:
3139: # ---------------------------------------------- Custom access rule evaluation
3140:
3141: sub customaccess {
3142: my ($priv,$uri)=@_;
3143: my ($urole,$urealm)=split(/\./,$env{'request.role'});
3144: $urealm=~s/^\W//;
3145: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
3146: my $access=0;
3147: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
3148: my ($effect,$realm,$role)=split(/\:/,$_);
3149: if ($role) {
3150: if ($role ne $urole) { next; }
3151: }
3152: foreach (split(/\s*\,\s*/,$realm)) {
3153: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
3154: if ($tdom) {
3155: if ($tdom ne $udom) { next; }
3156: }
3157: if ($tcrs) {
3158: if ($tcrs ne $ucrs) { next; }
3159: }
3160: if ($tsec) {
3161: if ($tsec ne $usec) { next; }
3162: }
3163: $access=($effect eq 'allow');
3164: last;
3165: }
3166: if ($realm eq '' && $role eq '') {
3167: $access=($effect eq 'allow');
3168: }
3169: }
3170: return $access;
3171: }
3172:
3173: # ------------------------------------------------- Check for a user privilege
3174:
3175: sub allowed {
3176: my ($priv,$uri,$symb)=@_;
3177: my $ver_orguri=$uri;
3178: $uri=&deversion($uri);
3179: my $orguri=$uri;
3180: $uri=&declutter($uri);
3181:
3182: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3183: # Free bre access to adm and meta resources
3184: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
3185: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
3186: return 'F';
3187: }
3188:
3189: # Free bre access to user's own portfolio contents
3190: my ($space,$domain,$name,@dir)=split('/',$uri);
3191: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3192: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
3193: return 'F';
3194: }
3195:
3196: # bre access to group if user has rgf priv for this group and course.
3197: if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
3198: && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
3199: if (exists($env{'request.course.id'})) {
3200: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
3201: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
3202: if (($domain eq $cdom) && ($name eq $cnum)) {
3203: my $courseprivid=$env{'request.course.id'};
3204: $courseprivid=~s/\_/\//;
3205: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
3206: .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
3207: return $1;
3208: }
3209: }
3210: }
3211: }
3212:
3213: # Free bre to public access
3214:
3215: if ($priv eq 'bre') {
3216: my $copyright=&metadata($uri,'copyright');
3217: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3218: return 'F';
3219: }
3220: if ($copyright eq 'priv') {
3221: $uri=~/([^\/]+)\/([^\/]+)\//;
3222: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3223: return '';
3224: }
3225: }
3226: if ($copyright eq 'domain') {
3227: $uri=~/([^\/]+)\/([^\/]+)\//;
3228: unless (($env{'user.domain'} eq $1) ||
3229: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3230: return '';
3231: }
3232: }
3233: if ($env{'request.role'}=~ /li\.\//) {
3234: # Library role, so allow browsing of resources in this domain.
3235: return 'F';
3236: }
3237: if ($copyright eq 'custom') {
3238: unless (&customaccess($priv,$uri)) { return ''; }
3239: }
3240: }
3241: # Domain coordinator is trying to create a course
3242: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3243: # uri is the requested domain in this case.
3244: # comparison to 'request.role.domain' shows if the user has selected
3245: # a role of dc for the domain in question.
3246: return 'F' if ($uri eq $env{'request.role.domain'});
3247: }
3248:
3249: my $thisallowed='';
3250: my $statecond=0;
3251: my $courseprivid='';
3252:
3253: # Course
3254:
3255: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3256: $thisallowed.=$1;
3257: }
3258:
3259: # Domain
3260:
3261: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3262: =~/\Q$priv\E\&([^\:]*)/) {
3263: $thisallowed.=$1;
3264: }
3265:
3266: # Course: uri itself is a course
3267: my $courseuri=$uri;
3268: $courseuri=~s/\_(\d)/\/$1/;
3269: $courseuri=~s/^([^\/])/\/$1/;
3270:
3271: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3272: =~/\Q$priv\E\&([^\:]*)/) {
3273: $thisallowed.=$1;
3274: }
3275:
3276: # Group: uri itself is a group
3277: my $groupuri=$uri;
3278: $groupuri=~s/^([^\/])/\/$1/;
3279: if ($env{'user.priv.'.$env{'request.role'}.'.'.$groupuri}
3280: =~/\Q$priv\E\&([^\:]*)/) {
3281: $thisallowed.=$1;
3282: }
3283:
3284: # URI is an uploaded document for this course, default permissions don't matter
3285: # not allowing 'edit' access (editupload) to uploaded course docs
3286: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3287: $thisallowed='';
3288: my ($match)=&is_on_map($uri);
3289: if ($match) {
3290: if ($env{'user.priv.'.$env{'request.role'}.'./'}
3291: =~/\Q$priv\E\&([^\:]*)/) {
3292: $thisallowed.=$1;
3293: }
3294: } else {
3295: my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
3296: if ($refuri) {
3297: if ($refuri =~ m|^/adm/|) {
3298: $thisallowed='F';
3299: } else {
3300: $refuri=&declutter($refuri);
3301: my ($match) = &is_on_map($refuri);
3302: if ($match) {
3303: $thisallowed='F';
3304: }
3305: }
3306: }
3307: }
3308: }
3309:
3310: # Full access at system, domain or course-wide level? Exit.
3311:
3312: if ($thisallowed=~/F/) {
3313: return 'F';
3314: }
3315:
3316: # If this is generating or modifying users, exit with special codes
3317:
3318: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3319: if (($priv eq 'cca') || ($priv eq 'caa')) {
3320: my ($audom,$auname)=split('/',$uri);
3321: # no author name given, so this just checks on the general right to make a co-author in this domain
3322: unless ($auname) { return $thisallowed; }
3323: # an author name is given, so we are about to actually make a co-author for a certain account
3324: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3325: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3326: ($audom ne $env{'request.role.domain'}))) { return ''; }
3327: }
3328: return $thisallowed;
3329: }
3330: #
3331: # Gathered so far: system, domain and course wide privileges
3332: #
3333: # Course: See if uri or referer is an individual resource that is part of
3334: # the course
3335:
3336: if ($env{'request.course.id'}) {
3337:
3338: $courseprivid=$env{'request.course.id'};
3339: if ($env{'request.course.sec'}) {
3340: $courseprivid.='/'.$env{'request.course.sec'};
3341: }
3342: $courseprivid=~s/\_/\//;
3343: my $checkreferer=1;
3344: my ($match,$cond)=&is_on_map($uri);
3345: if ($match) {
3346: $statecond=$cond;
3347: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3348: =~/\Q$priv\E\&([^\:]*)/) {
3349: $thisallowed.=$1;
3350: $checkreferer=0;
3351: }
3352: }
3353:
3354: if ($checkreferer) {
3355: my $refuri=$env{'httpref.'.$orguri};
3356: unless ($refuri) {
3357: foreach (keys %env) {
3358: if ($_=~/^httpref\..*\*/) {
3359: my $pattern=$_;
3360: $pattern=~s/^httpref\.\/res\///;
3361: $pattern=~s/\*/\[\^\/\]\+/g;
3362: $pattern=~s/\//\\\//g;
3363: if ($orguri=~/$pattern/) {
3364: $refuri=$env{$_};
3365: }
3366: }
3367: }
3368: }
3369:
3370: if ($refuri) {
3371: $refuri=&declutter($refuri);
3372: my ($match,$cond)=&is_on_map($refuri);
3373: if ($match) {
3374: my $refstatecond=$cond;
3375: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3376: =~/\Q$priv\E\&([^\:]*)/) {
3377: $thisallowed.=$1;
3378: $uri=$refuri;
3379: $statecond=$refstatecond;
3380: }
3381: }
3382: }
3383: }
3384: }
3385:
3386: #
3387: # Gathered now: all privileges that could apply, and condition number
3388: #
3389: #
3390: # Full or no access?
3391: #
3392:
3393: if ($thisallowed=~/F/) {
3394: return 'F';
3395: }
3396:
3397: unless ($thisallowed) {
3398: return '';
3399: }
3400:
3401: # Restrictions exist, deal with them
3402: #
3403: # C:according to course preferences
3404: # R:according to resource settings
3405: # L:unless locked
3406: # X:according to user session state
3407: #
3408:
3409: # Possibly locked functionality, check all courses
3410: # Locks might take effect only after 10 minutes cache expiration for other
3411: # courses, and 2 minutes for current course
3412:
3413: my $envkey;
3414: if ($thisallowed=~/L/) {
3415: foreach $envkey (keys %env) {
3416: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3417: my $courseid=$2;
3418: my $roleid=$1.'.'.$2;
3419: $courseid=~s/^\///;
3420: my $expiretime=600;
3421: if ($env{'request.role'} eq $roleid) {
3422: $expiretime=120;
3423: }
3424: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3425: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3426: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3427: &coursedescription($courseid);
3428: }
3429: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3430: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3431: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3432: &log($env{'user.domain'},$env{'user.name'},
3433: $env{'user.home'},
3434: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3435: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3436: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3437: return '';
3438: }
3439: }
3440: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3441: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3442: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3443: &log($env{'user.domain'},$env{'user.name'},
3444: $env{'user.home'},
3445: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3446: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3447: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3448: return '';
3449: }
3450: }
3451: }
3452: }
3453: }
3454:
3455: #
3456: # Rest of the restrictions depend on selected course
3457: #
3458:
3459: unless ($env{'request.course.id'}) {
3460: return '1';
3461: }
3462:
3463: #
3464: # Now user is definitely in a course
3465: #
3466:
3467:
3468: # Course preferences
3469:
3470: if ($thisallowed=~/C/) {
3471: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3472: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
3473: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
3474: =~/\Q$rolecode\E/) {
3475: if ($priv ne 'pch') {
3476: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3477: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3478: $env{'request.course.id'});
3479: }
3480: return '';
3481: }
3482:
3483: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
3484: =~/\Q$unamedom\E/) {
3485: if ($priv ne 'pch') {
3486: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
3487: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3488: $env{'request.course.id'});
3489: }
3490: return '';
3491: }
3492: }
3493:
3494: # Resource preferences
3495:
3496: if ($thisallowed=~/R/) {
3497: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3498: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3499: if ($priv ne 'pch') {
3500: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3501: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3502: }
3503: return '';
3504: }
3505: }
3506:
3507: # Restricted by state or randomout?
3508:
3509: if ($thisallowed=~/X/) {
3510: if ($env{'acc.randomout'}) {
3511: if (!$symb) { $symb=&symbread($uri,1); }
3512: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3513: return '';
3514: }
3515: }
3516: if (&condval($statecond)) {
3517: return '2';
3518: } else {
3519: return '';
3520: }
3521: }
3522:
3523: return 'F';
3524: }
3525:
3526: sub split_uri_for_cond {
3527: my $uri=&deversion(&declutter(shift));
3528: my @uriparts=split(/\//,$uri);
3529: my $filename=pop(@uriparts);
3530: my $pathname=join('/',@uriparts);
3531: return ($pathname,$filename);
3532: }
3533: # --------------------------------------------------- Is a resource on the map?
3534:
3535: sub is_on_map {
3536: my ($pathname,$filename) = &split_uri_for_cond(shift);
3537: #Trying to find the conditional for the file
3538: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3539: /\&\Q$filename\E\:([\d\|]+)\&/);
3540: if ($match) {
3541: return (1,$1);
3542: } else {
3543: return (0,0);
3544: }
3545: }
3546:
3547: # --------------------------------------------------------- Get symb from alias
3548:
3549: sub get_symb_from_alias {
3550: my $symb=shift;
3551: my ($map,$resid,$url)=&decode_symb($symb);
3552: # Already is a symb
3553: if ($url) { return $symb; }
3554: # Must be an alias
3555: my $aliassymb='';
3556: my %bighash;
3557: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
3558: &GDBM_READER(),0640)) {
3559: my $rid=$bighash{'mapalias_'.$symb};
3560: if ($rid) {
3561: my ($mapid,$resid)=split(/\./,$rid);
3562: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3563: $resid,$bighash{'src_'.$rid});
3564: }
3565: untie %bighash;
3566: }
3567: return $aliassymb;
3568: }
3569:
3570: # ----------------------------------------------------------------- Define Role
3571:
3572: sub definerole {
3573: if (allowed('mcr','/')) {
3574: my ($rolename,$sysrole,$domrole,$courole)=@_;
3575: foreach (split(':',$sysrole)) {
3576: my ($crole,$cqual)=split(/\&/,$_);
3577: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3578: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3579: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3580: return "refused:s:$crole&$cqual";
3581: }
3582: }
3583: }
3584: foreach (split(':',$domrole)) {
3585: my ($crole,$cqual)=split(/\&/,$_);
3586: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3587: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3588: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3589: return "refused:d:$crole&$cqual";
3590: }
3591: }
3592: }
3593: foreach (split(':',$courole)) {
3594: my ($crole,$cqual)=split(/\&/,$_);
3595: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3596: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3597: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3598: return "refused:c:$crole&$cqual";
3599: }
3600: }
3601: }
3602: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3603: "$env{'user.domain'}:$env{'user.name'}:".
3604: "rolesdef_$rolename=".
3605: escape($sysrole.'_'.$domrole.'_'.$courole);
3606: return reply($command,$env{'user.home'});
3607: } else {
3608: return 'refused';
3609: }
3610: }
3611:
3612: # ---------------- Make a metadata query against the network of library servers
3613:
3614: sub metadata_query {
3615: my ($query,$custom,$customshow,$server_array)=@_;
3616: my %rhash;
3617: my @server_list = (defined($server_array) ? @$server_array
3618: : keys(%libserv) );
3619: for my $server (@server_list) {
3620: unless ($custom or $customshow) {
3621: my $reply=&reply("querysend:".&escape($query),$server);
3622: $rhash{$server}=$reply;
3623: }
3624: else {
3625: my $reply=&reply("querysend:".&escape($query).':'.
3626: &escape($custom).':'.&escape($customshow),
3627: $server);
3628: $rhash{$server}=$reply;
3629: }
3630: }
3631: return \%rhash;
3632: }
3633:
3634: # ----------------------------------------- Send log queries and wait for reply
3635:
3636: sub log_query {
3637: my ($uname,$udom,$query,%filters)=@_;
3638: my $uhome=&homeserver($uname,$udom);
3639: if ($uhome eq 'no_host') { return 'error: no_host'; }
3640: my $uhost=$hostname{$uhome};
3641: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3642: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3643: $uhome);
3644: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3645: return get_query_reply($queryid);
3646: }
3647:
3648: # ------- Request retrieval of institutional classlists for course(s)
3649:
3650: sub fetch_enrollment_query {
3651: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3652: my $homeserver;
3653: my $maxtries = 1;
3654: if ($context eq 'automated') {
3655: $homeserver = $perlvar{'lonHostID'};
3656: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3657: } else {
3658: $homeserver = &homeserver($cnum,$dom);
3659: }
3660: my $host=$hostname{$homeserver};
3661: my $cmd = '';
3662: foreach (keys %{$affiliatesref}) {
3663: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3664: }
3665: $cmd =~ s/%%$//;
3666: $cmd = &escape($cmd);
3667: my $query = 'fetchenrollment';
3668: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
3669: unless ($queryid=~/^\Q$host\E\_/) {
3670: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3671: return 'error: '.$queryid;
3672: }
3673: my $reply = &get_query_reply($queryid);
3674: my $tries = 1;
3675: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3676: $reply = &get_query_reply($queryid);
3677: $tries ++;
3678: }
3679: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3680: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3681: } else {
3682: my @responses = split/:/,$reply;
3683: if ($homeserver eq $perlvar{'lonHostID'}) {
3684: foreach (@responses) {
3685: my ($key,$value) = split/=/,$_;
3686: $$replyref{$key} = $value;
3687: }
3688: } else {
3689: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3690: foreach (@responses) {
3691: my ($key,$value) = split/=/,$_;
3692: $$replyref{$key} = $value;
3693: if ($value > 0) {
3694: foreach (@{$$affiliatesref{$key}}) {
3695: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3696: my $destname = $pathname.'/'.$filename;
3697: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3698: if ($xml_classlist =~ /^error/) {
3699: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3700: } else {
3701: if ( open(FILE,">$destname") ) {
3702: print FILE &unescape($xml_classlist);
3703: close(FILE);
3704: } else {
3705: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3706: }
3707: }
3708: }
3709: }
3710: }
3711: }
3712: return 'ok';
3713: }
3714: return 'error';
3715: }
3716:
3717: sub get_query_reply {
3718: my $queryid=shift;
3719: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3720: my $reply='';
3721: for (1..100) {
3722: sleep 2;
3723: if (-e $replyfile.'.end') {
3724: if (open(my $fh,$replyfile)) {
3725: $reply.=<$fh>;
3726: close($fh);
3727: } else { return 'error: reply_file_error'; }
3728: return &unescape($reply);
3729: }
3730: }
3731: return 'timeout:'.$queryid;
3732: }
3733:
3734: sub courselog_query {
3735: #
3736: # possible filters:
3737: # url: url or symb
3738: # username
3739: # domain
3740: # action: view, submit, grade
3741: # start: timestamp
3742: # end: timestamp
3743: #
3744: my (%filters)=@_;
3745: unless ($env{'request.course.id'}) { return 'no_course'; }
3746: if ($filters{'url'}) {
3747: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3748: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3749: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3750: }
3751: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
3752: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
3753: return &log_query($cname,$cdom,'courselog',%filters);
3754: }
3755:
3756: sub userlog_query {
3757: my ($uname,$udom,%filters)=@_;
3758: return &log_query($uname,$udom,'userlog',%filters);
3759: }
3760:
3761: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3762:
3763: sub auto_run {
3764: my ($cnum,$cdom) = @_;
3765: my $homeserver = &homeserver($cnum,$cdom);
3766: my $response = &reply('autorun:'.$cdom,$homeserver);
3767: return $response;
3768: }
3769:
3770: sub auto_get_sections {
3771: my ($cnum,$cdom,$inst_coursecode) = @_;
3772: my $homeserver = &homeserver($cnum,$cdom);
3773: my @secs = ();
3774: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3775: unless ($response eq 'refused') {
3776: @secs = split/:/,$response;
3777: }
3778: return @secs;
3779: }
3780:
3781: sub auto_new_course {
3782: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3783: my $homeserver = &homeserver($cnum,$cdom);
3784: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3785: return $response;
3786: }
3787:
3788: sub auto_validate_courseID {
3789: my ($cnum,$cdom,$inst_course_id) = @_;
3790: my $homeserver = &homeserver($cnum,$cdom);
3791: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3792: return $response;
3793: }
3794:
3795: sub auto_create_password {
3796: my ($cnum,$cdom,$authparam) = @_;
3797: my $homeserver = &homeserver($cnum,$cdom);
3798: my $create_passwd = 0;
3799: my $authchk = '';
3800: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3801: if ($response eq 'refused') {
3802: $authchk = 'refused';
3803: } else {
3804: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3805: }
3806: return ($authparam,$create_passwd,$authchk);
3807: }
3808:
3809: sub auto_photo_permission {
3810: my ($cnum,$cdom,$students) = @_;
3811: my $homeserver = &homeserver($cnum,$cdom);
3812: my ($outcome,$perm_reqd,$conditions) =
3813: split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
3814: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
3815: return (undef,undef);
3816: }
3817: return ($outcome,$perm_reqd,$conditions);
3818: }
3819:
3820: sub auto_checkphotos {
3821: my ($uname,$udom,$pid) = @_;
3822: my $homeserver = &homeserver($uname,$udom);
3823: my ($result,$resulttype);
3824: my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
3825: &escape($uname).':'.&escape($pid),
3826: $homeserver));
3827: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
3828: return (undef,undef);
3829: }
3830: if ($outcome) {
3831: ($result,$resulttype) = split(/:/,$outcome);
3832: }
3833: return ($result,$resulttype);
3834: }
3835:
3836: sub auto_photochoice {
3837: my ($cnum,$cdom) = @_;
3838: my $homeserver = &homeserver($cnum,$cdom);
3839: my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
3840: &escape($cdom),
3841: $homeserver)));
3842: if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
3843: return (undef,undef);
3844: }
3845: return ($update,$comment);
3846: }
3847:
3848: sub auto_photoupdate {
3849: my ($affiliatesref,$dom,$cnum,$photo) = @_;
3850: my $homeserver = &homeserver($cnum,$dom);
3851: my $host=$hostname{$homeserver};
3852: my $cmd = '';
3853: my $maxtries = 1;
3854: foreach (keys %{$affiliatesref}) {
3855: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3856: }
3857: $cmd =~ s/%%$//;
3858: $cmd = &escape($cmd);
3859: my $query = 'institutionalphotos';
3860: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
3861: unless ($queryid=~/^\Q$host\E\_/) {
3862: &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
3863: return 'error: '.$queryid;
3864: }
3865: my $reply = &get_query_reply($queryid);
3866: my $tries = 1;
3867: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3868: $reply = &get_query_reply($queryid);
3869: $tries ++;
3870: }
3871: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3872: &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3873: } else {
3874: my @responses = split(/:/,$reply);
3875: my $outcome = shift(@responses);
3876: foreach my $item (@responses) {
3877: my ($key,$value) = split(/=/,$item);
3878: $$photo{$key} = $value;
3879: }
3880: return $outcome;
3881: }
3882: return 'error';
3883: }
3884:
3885: sub auto_instcode_format {
3886: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3887: my $courses = '';
3888: my $homeserver;
3889: if ($caller eq 'global') {
3890: foreach my $tryserver (keys %libserv) {
3891: if ($hostdom{$tryserver} eq $codedom) {
3892: $homeserver = $tryserver;
3893: last;
3894: }
3895: }
3896: if (($env{'user.name'}) && ($env{'user.domain'} eq $codedom)) {
3897: $homeserver = &homeserver($env{'user.name'},$codedom);
3898: }
3899: } else {
3900: $homeserver = &homeserver($caller,$codedom);
3901: }
3902: foreach (keys %{$instcodes}) {
3903: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3904: }
3905: chop($courses);
3906: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3907: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3908: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3909: %{$codes} = &str2hash($codes_str);
3910: @{$codetitles} = &str2array($codetitles_str);
3911: %{$cat_titles} = &str2hash($cat_titles_str);
3912: %{$cat_order} = &str2hash($cat_order_str);
3913: return 'ok';
3914: }
3915: return $response;
3916: }
3917:
3918: # ------------------------------------------------------- Course Group routines
3919:
3920: sub get_coursegroups {
3921: my ($cdom,$cnum,$group) = @_;
3922: return(&dump('coursegroups',$cdom,$cnum,$group));
3923: }
3924:
3925: sub modify_coursegroup {
3926: my ($cdom,$cnum,$groupsettings) = @_;
3927: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
3928: }
3929:
3930: sub modify_group_roles {
3931: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
3932: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
3933: my $role = 'gr/'.&escape($userprivs);
3934: my ($uname,$udom) = split(/:/,$user);
3935: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
3936: if ($result eq 'ok') {
3937: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
3938: }
3939:
3940: return $result;
3941: }
3942:
3943: sub modify_coursegroup_membership {
3944: my ($cdom,$cnum,$membership) = @_;
3945: my $result = &put('groupmembership',$membership,$cdom,$cnum);
3946: return $result;
3947: }
3948:
3949: sub get_active_groups {
3950: my ($udom,$uname,$cdom,$cnum) = @_;
3951: my $now = time;
3952: my %groups = ();
3953: foreach my $key (keys(%env)) {
3954: if ($key =~ m-user\.role\.gr\./([^/]+)/([^/]+)/(\w+)$-) {
3955: my ($start,$end) = split(/\./,$env{$key});
3956: if (($end!=0) && ($end<$now)) { next; }
3957: if (($start!=0) && ($start>$now)) { next; }
3958: if ($1 eq $cdom && $2 eq $cnum) {
3959: $groups{$3} = $env{$key} ;
3960: }
3961: }
3962: }
3963: return %groups;
3964: }
3965:
3966: sub get_group_membership {
3967: my ($cdom,$cnum,$group) = @_;
3968: return(&dump('groupmembership',$cdom,$cnum,$group));
3969: }
3970:
3971: sub get_users_groups {
3972: my ($udom,$uname,$courseid) = @_;
3973: my $cachetime=1800;
3974: $courseid=~s/\_/\//g;
3975: $courseid=~s/^(\w)/\/$1/;
3976:
3977: my $hashid="$udom:$uname:$courseid";
3978: my ($result,$cached)=&is_cached_new('getgroups',$hashid);
3979: if (defined($cached)) { return $result; }
3980:
3981: my %roleshash = &dump('roles',$udom,$uname,$courseid);
3982: my ($tmp) = keys(%roleshash);
3983: if ($tmp=~/^error:/) {
3984: &logthis('Error retrieving roles: '.$tmp.' for '.$uname.':'.$udom);
3985: return '';
3986: } else {
3987: my $grouplist;
3988: foreach my $key (keys %roleshash) {
3989: if ($key =~ /^\Q$courseid\E\/(\w+)\_gr$/) {
3990: unless ($roleshash{$key} =~ /_1_1$/) { # deleted membership
3991: $grouplist .= $1.':';
3992: }
3993: }
3994: }
3995: $grouplist =~ s/:$//;
3996: return &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
3997: }
3998: }
3999:
4000: sub devalidate_getgroups_cache {
4001: my ($udom,$uname,$cdom,$cnum)=@_;
4002: my $courseid = $cdom.'_'.$cnum;
4003: $courseid=~s/\_/\//g;
4004: $courseid=~s/^(\w)/\/$1/;
4005: my $hashid="$udom:$uname:$courseid";
4006: &devalidate_cache_new('getgroups',$hashid);
4007: }
4008:
4009: # ------------------------------------------------------------------ Plain Text
4010:
4011: sub plaintext {
4012: my $short=shift;
4013: return &Apache::lonlocal::mt($prp{$short});
4014: }
4015:
4016: # ----------------------------------------------------------------- Assign Role
4017:
4018: sub assignrole {
4019: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
4020: my $mrole;
4021: if ($role =~ /^cr\//) {
4022: my $cwosec=$url;
4023: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4024: unless (&allowed('ccr',$cwosec)) {
4025: &logthis('Refused custom assignrole: '.
4026: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4027: $env{'user.name'}.' at '.$env{'user.domain'});
4028: return 'refused';
4029: }
4030: $mrole='cr';
4031: } elsif ($role =~ /^gr\//) {
4032: my $cwogrp=$url;
4033: $cwogrp=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4034: unless (&allowed('mdg',$cwogrp)) {
4035: &logthis('Refused group assignrole: '.
4036: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4037: $env{'user.name'}.' at '.$env{'user.domain'});
4038: return 'refused';
4039: }
4040: $mrole='gr';
4041: } else {
4042: my $cwosec=$url;
4043: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4044: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
4045: &logthis('Refused assignrole: '.
4046: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4047: $env{'user.name'}.' at '.$env{'user.domain'});
4048: return 'refused';
4049: }
4050: $mrole=$role;
4051: }
4052: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4053: "$udom:$uname:$url".'_'."$mrole=$role";
4054: if ($end) { $command.='_'.$end; }
4055: if ($start) {
4056: if ($end) {
4057: $command.='_'.$start;
4058: } else {
4059: $command.='_0_'.$start;
4060: }
4061: }
4062: # actually delete
4063: if ($deleteflag) {
4064: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
4065: # modify command to delete the role
4066: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
4067: "$udom:$uname:$url".'_'."$mrole";
4068: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
4069: # set start and finish to negative values for userrolelog
4070: $start=-1;
4071: $end=-1;
4072: }
4073: }
4074: # send command
4075: my $answer=&reply($command,&homeserver($uname,$udom));
4076: # log new user role if status is ok
4077: if ($answer eq 'ok') {
4078: &userrolelog($role,$uname,$udom,$url,$start,$end);
4079: }
4080: return $answer;
4081: }
4082:
4083: # -------------------------------------------------- Modify user authentication
4084: # Overrides without validation
4085:
4086: sub modifyuserauth {
4087: my ($udom,$uname,$umode,$upass)=@_;
4088: my $uhome=&homeserver($uname,$udom);
4089: unless (&allowed('mau',$udom)) { return 'refused'; }
4090: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
4091: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4092: ' in domain '.$env{'request.role.domain'});
4093: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
4094: &escape($upass),$uhome);
4095: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
4096: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
4097: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4098: &log($udom,,$uname,$uhome,
4099: 'Authentication changed by '.$env{'user.domain'}.', '.
4100: $env{'user.name'}.', '.$umode.
4101: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4102: unless ($reply eq 'ok') {
4103: &logthis('Authentication mode error: '.$reply);
4104: return 'error: '.$reply;
4105: }
4106: return 'ok';
4107: }
4108:
4109: # --------------------------------------------------------------- Modify a user
4110:
4111: sub modifyuser {
4112: my ($udom, $uname, $uid,
4113: $umode, $upass, $first,
4114: $middle, $last, $gene,
4115: $forceid, $desiredhome, $email)=@_;
4116: $udom=~s/\W//g;
4117: $uname=~s/\W//g;
4118: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
4119: $umode.', '.$first.', '.$middle.', '.
4120: $last.', '.$gene.'(forceid: '.$forceid.')'.
4121: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
4122: ' desiredhome not specified').
4123: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4124: ' in domain '.$env{'request.role.domain'});
4125: my $uhome=&homeserver($uname,$udom,'true');
4126: # ----------------------------------------------------------------- Create User
4127: if (($uhome eq 'no_host') &&
4128: (($umode && $upass) || ($umode eq 'localauth'))) {
4129: my $unhome='';
4130: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
4131: $unhome = $desiredhome;
4132: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
4133: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
4134: } else { # load balancing routine for determining $unhome
4135: my $tryserver;
4136: my $loadm=10000000;
4137: foreach $tryserver (keys %libserv) {
4138: if ($hostdom{$tryserver} eq $udom) {
4139: my $answer=reply('load',$tryserver);
4140: if (($answer=~/\d+/) && ($answer<$loadm)) {
4141: $loadm=$answer;
4142: $unhome=$tryserver;
4143: }
4144: }
4145: }
4146: }
4147: if (($unhome eq '') || ($unhome eq 'no_host')) {
4148: return 'error: unable to find a home server for '.$uname.
4149: ' in domain '.$udom;
4150: }
4151: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
4152: &escape($upass),$unhome);
4153: unless ($reply eq 'ok') {
4154: return 'error: '.$reply;
4155: }
4156: $uhome=&homeserver($uname,$udom,'true');
4157: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
4158: return 'error: unable verify users home machine.';
4159: }
4160: } # End of creation of new user
4161: # ---------------------------------------------------------------------- Add ID
4162: if ($uid) {
4163: $uid=~tr/A-Z/a-z/;
4164: my %uidhash=&idrget($udom,$uname);
4165: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
4166: && (!$forceid)) {
4167: unless ($uid eq $uidhash{$uname}) {
4168: return 'error: user id "'.$uid.'" does not match '.
4169: 'current user id "'.$uidhash{$uname}.'".';
4170: }
4171: } else {
4172: &idput($udom,($uname => $uid));
4173: }
4174: }
4175: # -------------------------------------------------------------- Add names, etc
4176: my @tmp=&get('environment',
4177: ['firstname','middlename','lastname','generation'],
4178: $udom,$uname);
4179: my %names;
4180: if ($tmp[0] =~ m/^error:.*/) {
4181: %names=();
4182: } else {
4183: %names = @tmp;
4184: }
4185: #
4186: # Make sure to not trash student environment if instructor does not bother
4187: # to supply name and email information
4188: #
4189: if ($first) { $names{'firstname'} = $first; }
4190: if (defined($middle)) { $names{'middlename'} = $middle; }
4191: if ($last) { $names{'lastname'} = $last; }
4192: if (defined($gene)) { $names{'generation'} = $gene; }
4193: if ($email) {
4194: $email=~s/[^\w\@\.\-\,]//gs;
4195: if ($email=~/\@/) { $names{'notification'} = $email;
4196: $names{'critnotification'} = $email;
4197: $names{'permanentemail'} = $email; }
4198: }
4199: my $reply = &put('environment', \%names, $udom,$uname);
4200: if ($reply ne 'ok') { return 'error: '.$reply; }
4201: &devalidate_cache_new('namescache',$uname.':'.$udom);
4202: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
4203: $umode.', '.$first.', '.$middle.', '.
4204: $last.', '.$gene.' by '.
4205: $env{'user.name'}.' at '.$env{'user.domain'});
4206: return 'ok';
4207: }
4208:
4209: # -------------------------------------------------------------- Modify student
4210:
4211: sub modifystudent {
4212: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
4213: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
4214: if (!$cid) {
4215: unless ($cid=$env{'request.course.id'}) {
4216: return 'not_in_class';
4217: }
4218: }
4219: # --------------------------------------------------------------- Make the user
4220: my $reply=&modifyuser
4221: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
4222: $desiredhome,$email);
4223: unless ($reply eq 'ok') { return $reply; }
4224: # This will cause &modify_student_enrollment to get the uid from the
4225: # students environment
4226: $uid = undef if (!$forceid);
4227: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
4228: $gene,$usec,$end,$start,$type,$locktype,$cid);
4229: return $reply;
4230: }
4231:
4232: sub modify_student_enrollment {
4233: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
4234: my ($cdom,$cnum,$chome);
4235: if (!$cid) {
4236: unless ($cid=$env{'request.course.id'}) {
4237: return 'not_in_class';
4238: }
4239: $cdom=$env{'course.'.$cid.'.domain'};
4240: $cnum=$env{'course.'.$cid.'.num'};
4241: } else {
4242: ($cdom,$cnum)=split(/_/,$cid);
4243: }
4244: $chome=$env{'course.'.$cid.'.home'};
4245: if (!$chome) {
4246: $chome=&homeserver($cnum,$cdom);
4247: }
4248: if (!$chome) { return 'unknown_course'; }
4249: # Make sure the user exists
4250: my $uhome=&homeserver($uname,$udom);
4251: if (($uhome eq '') || ($uhome eq 'no_host')) {
4252: return 'error: no such user';
4253: }
4254: # Get student data if we were not given enough information
4255: if (!defined($first) || $first eq '' ||
4256: !defined($last) || $last eq '' ||
4257: !defined($uid) || $uid eq '' ||
4258: !defined($middle) || $middle eq '' ||
4259: !defined($gene) || $gene eq '') {
4260: # They did not supply us with enough data to enroll the student, so
4261: # we need to pick up more information.
4262: my %tmp = &get('environment',
4263: ['firstname','middlename','lastname', 'generation','id']
4264: ,$udom,$uname);
4265:
4266: #foreach (keys(%tmp)) {
4267: # &logthis("key $_ = ".$tmp{$_});
4268: #}
4269: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
4270: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
4271: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
4272: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
4273: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
4274: }
4275: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
4276: my $reply=cput('classlist',
4277: {"$uname:$udom" =>
4278: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
4279: $cdom,$cnum);
4280: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
4281: return 'error: '.$reply;
4282: } else {
4283: &devalidate_getsection_cache($udom,$uname,$cid);
4284: }
4285: # Add student role to user
4286: my $uurl='/'.$cid;
4287: $uurl=~s/\_/\//g;
4288: if ($usec) {
4289: $uurl.='/'.$usec;
4290: }
4291: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
4292: }
4293:
4294: sub format_name {
4295: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
4296: my $name;
4297: if ($first ne 'lastname') {
4298: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
4299: } else {
4300: if ($lastname=~/\S/) {
4301: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
4302: $name=~s/\s+,/,/;
4303: } else {
4304: $name.= $firstname.' '.$middlename.' '.$generation;
4305: }
4306: }
4307: $name=~s/^\s+//;
4308: $name=~s/\s+$//;
4309: $name=~s/\s+/ /g;
4310: return $name;
4311: }
4312:
4313: # ------------------------------------------------- Write to course preferences
4314:
4315: sub writecoursepref {
4316: my ($courseid,%prefs)=@_;
4317: $courseid=~s/^\///;
4318: $courseid=~s/\_/\//g;
4319: my ($cdomain,$cnum)=split(/\//,$courseid);
4320: my $chome=homeserver($cnum,$cdomain);
4321: if (($chome eq '') || ($chome eq 'no_host')) {
4322: return 'error: no such course';
4323: }
4324: my $cstring='';
4325: foreach (keys %prefs) {
4326: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
4327: }
4328: $cstring=~s/\&$//;
4329: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
4330: }
4331:
4332: # ---------------------------------------------------------- Make/modify course
4333:
4334: sub createcourse {
4335: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_;
4336: $url=&declutter($url);
4337: my $cid='';
4338: unless (&allowed('ccc',$udom)) {
4339: return 'refused';
4340: }
4341: # ------------------------------------------------------------------- Create ID
4342: my $uname=int(1+rand(9)).
4343: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
4344: substr($$.time,0,5).unpack("H8",pack("I32",time)).
4345: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4346: # ----------------------------------------------- Make sure that does not exist
4347: my $uhome=&homeserver($uname,$udom,'true');
4348: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4349: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
4350: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4351: $uhome=&homeserver($uname,$udom,'true');
4352: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4353: return 'error: unable to generate unique course-ID';
4354: }
4355: }
4356: # ------------------------------------------------ Check supplied server name
4357: $course_server = $env{'user.homeserver'} if (! defined($course_server));
4358: if (! exists($libserv{$course_server})) {
4359: return 'error:bad server name '.$course_server;
4360: }
4361: # ------------------------------------------------------------- Make the course
4362: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
4363: $course_server);
4364: unless ($reply eq 'ok') { return 'error: '.$reply; }
4365: $uhome=&homeserver($uname,$udom,'true');
4366: if (($uhome eq '') || ($uhome eq 'no_host')) {
4367: return 'error: no such course';
4368: }
4369: # ----------------------------------------------------------------- Course made
4370: # log existence
4371: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
4372: ':'.&escape($inst_code).':'.&escape($course_owner),$uhome);
4373: &flushcourselogs();
4374: # set toplevel url
4375: my $topurl=$url;
4376: unless ($nonstandard) {
4377: # ------------------------------------------ For standard courses, make top url
4378: my $mapurl=&clutter($url);
4379: if ($mapurl eq '/res/') { $mapurl=''; }
4380: $env{'form.initmap'}=(<<ENDINITMAP);
4381: <map>
4382: <resource id="1" type="start"></resource>
4383: <resource id="2" src="$mapurl"></resource>
4384: <resource id="3" type="finish"></resource>
4385: <link index="1" from="1" to="2"></link>
4386: <link index="2" from="2" to="3"></link>
4387: </map>
4388: ENDINITMAP
4389: $topurl=&declutter(
4390: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
4391: );
4392: }
4393: # ----------------------------------------------------------- Write preferences
4394: &writecoursepref($udom.'_'.$uname,
4395: ('description' => $description,
4396: 'url' => $topurl));
4397: return '/'.$udom.'/'.$uname;
4398: }
4399:
4400: # ---------------------------------------------------------- Assign Custom Role
4401:
4402: sub assigncustomrole {
4403: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
4404: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
4405: $end,$start,$deleteflag);
4406: }
4407:
4408: # ----------------------------------------------------------------- Revoke Role
4409:
4410: sub revokerole {
4411: my ($udom,$uname,$url,$role,$deleteflag)=@_;
4412: my $now=time;
4413: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
4414: }
4415:
4416: # ---------------------------------------------------------- Revoke Custom Role
4417:
4418: sub revokecustomrole {
4419: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
4420: my $now=time;
4421: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
4422: $deleteflag);
4423: }
4424:
4425: # ------------------------------------------------------------ Disk usage
4426: sub diskusage {
4427: my ($udom,$uname,$directoryRoot)=@_;
4428: $directoryRoot =~ s/\/$//;
4429: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
4430: return $listing;
4431: }
4432:
4433: sub is_locked {
4434: my ($file_name, $domain, $user) = @_;
4435: my @check;
4436: my $is_locked;
4437: push @check, $file_name;
4438: my %locked = &get('file_permissions',\@check,
4439: $env{'user.domain'},$env{'user.name'});
4440: my ($tmp)=keys(%locked);
4441: if ($tmp=~/^error:/) { undef(%locked); }
4442:
4443: if (ref($locked{$file_name}) eq 'ARRAY') {
4444: $is_locked = 'true';
4445: } else {
4446: $is_locked = 'false';
4447: }
4448: }
4449:
4450: # ------------------------------------------------------------- Mark as Read Only
4451:
4452: sub mark_as_readonly {
4453: my ($domain,$user,$files,$what) = @_;
4454: my %current_permissions = &dump('file_permissions',$domain,$user);
4455: my ($tmp)=keys(%current_permissions);
4456: if ($tmp=~/^error:/) { undef(%current_permissions); }
4457: foreach my $file (@{$files}) {
4458: push(@{$current_permissions{$file}},$what);
4459: }
4460: &put('file_permissions',\%current_permissions,$domain,$user);
4461: return;
4462: }
4463:
4464: # ------------------------------------------------------------Save Selected Files
4465:
4466: sub save_selected_files {
4467: my ($user, $path, @files) = @_;
4468: my $filename = $user."savedfiles";
4469: my @other_files = &files_not_in_path($user, $path);
4470: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4471: foreach my $file (@files) {
4472: print (OUT $env{'form.currentpath'}.$file."\n");
4473: }
4474: foreach my $file (@other_files) {
4475: print (OUT $file."\n");
4476: }
4477: close (OUT);
4478: return 'ok';
4479: }
4480:
4481: sub clear_selected_files {
4482: my ($user) = @_;
4483: my $filename = $user."savedfiles";
4484: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4485: print (OUT undef);
4486: close (OUT);
4487: return ("ok");
4488: }
4489:
4490: sub files_in_path {
4491: my ($user, $path) = @_;
4492: my $filename = $user."savedfiles";
4493: my %return_files;
4494: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4495: while (my $line_in = <IN>) {
4496: chomp ($line_in);
4497: my @paths_and_file = split (m!/!, $line_in);
4498: my $file_part = pop (@paths_and_file);
4499: my $path_part = join ('/', @paths_and_file);
4500: $path_part.='/';
4501: my $path_and_file = $path_part.$file_part;
4502: if ($path_part eq $path) {
4503: $return_files{$file_part}= 'selected';
4504: }
4505: }
4506: close (IN);
4507: return (\%return_files);
4508: }
4509:
4510: # called in portfolio select mode, to show files selected NOT in current directory
4511: sub files_not_in_path {
4512: my ($user, $path) = @_;
4513: my $filename = $user."savedfiles";
4514: my @return_files;
4515: my $path_part;
4516: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4517: while (<IN>) {
4518: #ok, I know it's clunky, but I want it to work
4519: my @paths_and_file = split m!/!, $_;
4520: my $file_part = pop (@paths_and_file);
4521: chomp ($file_part);
4522: my $path_part = join ('/', @paths_and_file);
4523: $path_part .= '/';
4524: my $path_and_file = $path_part.$file_part;
4525: if ($path_part ne $path) {
4526: push (@return_files, ($path_and_file));
4527: }
4528: }
4529: close (OUT);
4530: return (@return_files);
4531: }
4532:
4533: #--------------------------------------------------------------Get Marked as Read Only
4534:
4535:
4536: sub get_marked_as_readonly {
4537: my ($domain,$user,$what) = @_;
4538: my %current_permissions = &dump('file_permissions',$domain,$user);
4539: my ($tmp)=keys(%current_permissions);
4540: if ($tmp=~/^error:/) { undef(%current_permissions); }
4541: my @readonly_files;
4542: my $cmp1=$what;
4543: if (ref($what)) { $cmp1=join('',@{$what}) };
4544: while (my ($file_name,$value) = each(%current_permissions)) {
4545: if (ref($value) eq "ARRAY"){
4546: foreach my $stored_what (@{$value}) {
4547: my $cmp2=$stored_what;
4548: if (ref($stored_what)) { $cmp2=join('',@{$stored_what}) };
4549: if ($cmp1 eq $cmp2) {
4550: push(@readonly_files, $file_name);
4551: } elsif (!defined($what)) {
4552: push(@readonly_files, $file_name);
4553: }
4554: }
4555: }
4556: }
4557: return @readonly_files;
4558: }
4559: #-----------------------------------------------------------Get Marked as Read Only Hash
4560:
4561: sub get_marked_as_readonly_hash {
4562: my ($domain,$user,$what) = @_;
4563: my %current_permissions = &dump('file_permissions',$domain,$user);
4564: my ($tmp)=keys(%current_permissions);
4565: if ($tmp=~/^error:/) { undef(%current_permissions); }
4566:
4567: my %readonly_files;
4568: while (my ($file_name,$value) = each(%current_permissions)) {
4569: if (ref($value) eq "ARRAY"){
4570: foreach my $stored_what (@{$value}) {
4571: if ($stored_what eq $what) {
4572: $readonly_files{$file_name} = 'locked';
4573: } elsif (!defined($what)) {
4574: $readonly_files{$file_name} = 'locked';
4575: }
4576: }
4577: }
4578: }
4579: return %readonly_files;
4580: }
4581: # ------------------------------------------------------------ Unmark as Read Only
4582:
4583: sub unmark_as_readonly {
4584: # unmarks $file_name (if $file_name is defined), or all files locked by $what
4585: # for portfolio submissions, $what contains [$symb,$crsid]
4586: my ($domain,$user,$what,$file_name) = @_;
4587: my $symb_crs = $what;
4588: if (ref($what)) { $symb_crs=join('',@$what); }
4589: my %current_permissions = &dump('file_permissions',$domain,$user);
4590: my ($tmp)=keys(%current_permissions);
4591: if ($tmp=~/^error:/) { undef(%current_permissions); }
4592: my @readonly_files = &get_marked_as_readonly($domain,$user,$what);
4593: foreach my $file (@readonly_files) {
4594: if (defined($file_name) && ($file_name ne $file)) { next; }
4595: my $current_locks = $current_permissions{$file};
4596: my @new_locks;
4597: my @del_keys;
4598: if (ref($current_locks) eq "ARRAY"){
4599: foreach my $locker (@{$current_locks}) {
4600: my $compare=$locker;
4601: if (ref($locker)) { $compare=join('',@{$locker}) };
4602: if ($compare ne $symb_crs) {
4603: push(@new_locks, $locker);
4604: }
4605: }
4606: if (scalar(@new_locks) > 0) {
4607: $current_permissions{$file} = \@new_locks;
4608: } else {
4609: push(@del_keys, $file);
4610: &del('file_permissions',\@del_keys, $domain, $user);
4611: delete($current_permissions{$file});
4612: }
4613: }
4614: }
4615: &put('file_permissions',\%current_permissions,$domain,$user);
4616: return;
4617: }
4618:
4619: # ------------------------------------------------------------ Directory lister
4620:
4621: sub dirlist {
4622: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
4623:
4624: $uri=~s/^\///;
4625: $uri=~s/\/$//;
4626: my ($udom, $uname);
4627: (undef,$udom,$uname)=split(/\//,$uri);
4628: if(defined($userdomain)) {
4629: $udom = $userdomain;
4630: }
4631: if(defined($username)) {
4632: $uname = $username;
4633: }
4634:
4635: my $dirRoot = $perlvar{'lonDocRoot'};
4636: if(defined($alternateDirectoryRoot)) {
4637: $dirRoot = $alternateDirectoryRoot;
4638: $dirRoot =~ s/\/$//;
4639: }
4640:
4641: if($udom) {
4642: if($uname) {
4643: my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
4644: homeserver($uname,$udom));
4645: my @listing_results;
4646: if ($listing eq 'unknown_cmd') {
4647: $listing=reply('ls:'.$dirRoot.'/'.$uri,
4648: homeserver($uname,$udom));
4649: @listing_results = split(/:/,$listing);
4650: } else {
4651: @listing_results = map { &unescape($_); } split(/:/,$listing);
4652: }
4653: return @listing_results;
4654: } elsif(!defined($alternateDirectoryRoot)) {
4655: my $tryserver;
4656: my %allusers=();
4657: foreach $tryserver (keys %libserv) {
4658: if($hostdom{$tryserver} eq $udom) {
4659: my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
4660: $udom, $tryserver);
4661: my @listing_results;
4662: if ($listing eq 'unknown_cmd') {
4663: $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
4664: $udom, $tryserver);
4665: @listing_results = split(/:/,$listing);
4666: } else {
4667: @listing_results =
4668: map { &unescape($_); } split(/:/,$listing);
4669: }
4670: if ($listing_results[0] ne 'no_such_dir' &&
4671: $listing_results[0] ne 'empty' &&
4672: $listing_results[0] ne 'con_lost') {
4673: foreach (@listing_results) {
4674: my ($entry,@stat)=split(/&/,$_);
4675: $allusers{$entry}=1;
4676: }
4677: }
4678: }
4679: }
4680: my $alluserstr='';
4681: foreach (sort keys %allusers) {
4682: $alluserstr.=$_.'&user:';
4683: }
4684: $alluserstr=~s/:$//;
4685: return split(/:/,$alluserstr);
4686: } else {
4687: my @emptyResults = ();
4688: push(@emptyResults, 'missing user name');
4689: return split(':',@emptyResults);
4690: }
4691: } elsif(!defined($alternateDirectoryRoot)) {
4692: my $tryserver;
4693: my %alldom=();
4694: foreach $tryserver (keys %libserv) {
4695: $alldom{$hostdom{$tryserver}}=1;
4696: }
4697: my $alldomstr='';
4698: foreach (sort keys %alldom) {
4699: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
4700: }
4701: $alldomstr=~s/:$//;
4702: return split(/:/,$alldomstr);
4703: } else {
4704: my @emptyResults = ();
4705: push(@emptyResults, 'missing domain');
4706: return split(':',@emptyResults);
4707: }
4708: }
4709:
4710: # --------------------------------------------- GetFileTimestamp
4711: # This function utilizes dirlist and returns the date stamp for
4712: # when it was last modified. It will also return an error of -1
4713: # if an error occurs
4714:
4715: ##
4716: ## FIXME: This subroutine assumes its caller knows something about the
4717: ## directory structure of the home server for the student ($root).
4718: ## Not a good assumption to make. Since this is for looking up files
4719: ## in user directories, the full path should be constructed by lond, not
4720: ## whatever machine we request data from.
4721: ##
4722: sub GetFileTimestamp {
4723: my ($studentDomain,$studentName,$filename,$root)=@_;
4724: $studentDomain=~s/\W//g;
4725: $studentName=~s/\W//g;
4726: my $subdir=$studentName.'__';
4727: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4728: my $proname="$studentDomain/$subdir/$studentName";
4729: $proname .= '/'.$filename;
4730: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
4731: $studentName, $root);
4732: my @stats = split('&', $fileStat);
4733: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4734: # @stats contains first the filename, then the stat output
4735: return $stats[10]; # so this is 10 instead of 9.
4736: } else {
4737: return -1;
4738: }
4739: }
4740:
4741: sub stat_file {
4742: my ($uri) = @_;
4743: $uri = &clutter($uri);
4744:
4745: # we want just the url part without the unneeded accessor url bits
4746: if ($uri =~ m-^/adm/-) {
4747: $uri=~s-^/adm/wrapper/-/-;
4748: $uri=~s-^/adm/coursedocs/showdoc/-/-;
4749: }
4750: my ($udom,$uname,$file,$dir);
4751: if ($uri =~ m-^/(uploaded|editupload)/-) {
4752: ($udom,$uname,$file) =
4753: ($uri =~ m-/(?:uploaded|editupload)/?([^/]*)/?([^/]*)/?(.*)-);
4754: $file = 'userfiles/'.$file;
4755: $dir = &Apache::loncommon::propath($udom,$uname);
4756: }
4757: if ($uri =~ m-^/res/-) {
4758: ($udom,$uname) =
4759: ($uri =~ m-/(?:res)/?([^/]*)/?([^/]*)/-);
4760: $file = $uri;
4761: }
4762:
4763: if (!$udom || !$uname || !$file) {
4764: # unable to handle the uri
4765: return ();
4766: }
4767:
4768: my ($result) = &dirlist($file,$udom,$uname,$dir);
4769: my @stats = split('&', $result);
4770:
4771: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4772: shift(@stats); #filename is first
4773: return @stats;
4774: }
4775: return ();
4776: }
4777:
4778: # -------------------------------------------------------- Value of a Condition
4779:
4780: # gets the value of a specific preevaluated condition
4781: # stored in the string $env{user.state.<cid>}
4782: # or looks up a condition reference in the bighash and if if hasn't
4783: # already been evaluated recurses into docondval to get the value of
4784: # the condition, then memoizing it to
4785: # $env{user.state.<cid>.<condition>}
4786: sub directcondval {
4787: my $number=shift;
4788: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
4789: &Apache::lonuserstate::evalstate();
4790: }
4791: if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
4792: return $env{'user.state.'.$env{'request.course.id'}.".$number"};
4793: } elsif ($number =~ /^_/) {
4794: my $sub_condition;
4795: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4796: &GDBM_READER(),0640)) {
4797: $sub_condition=$bighash{'conditions'.$number};
4798: untie(%bighash);
4799: }
4800: my $value = &docondval($sub_condition);
4801: &appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
4802: return $value;
4803: }
4804: if ($env{'user.state.'.$env{'request.course.id'}}) {
4805: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
4806: } else {
4807: return 2;
4808: }
4809: }
4810:
4811: # get the collection of conditions for this resource
4812: sub condval {
4813: my $condidx=shift;
4814: my $allpathcond='';
4815: foreach my $cond (split(/\|/,$condidx)) {
4816: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
4817: $allpathcond.=
4818: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
4819: }
4820: }
4821: $allpathcond=~s/\|$//;
4822: return &docondval($allpathcond);
4823: }
4824:
4825: #evaluates an expression of conditions
4826: sub docondval {
4827: my ($allpathcond) = @_;
4828: my $result=0;
4829: if ($env{'request.course.id'}
4830: && defined($allpathcond)) {
4831: my $operand='|';
4832: my @stack;
4833: foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
4834: if ($chunk eq '(') {
4835: push @stack,($operand,$result);
4836: } elsif ($chunk eq ')') {
4837: my $before=pop @stack;
4838: if (pop @stack eq '&') {
4839: $result=$result>$before?$before:$result;
4840: } else {
4841: $result=$result>$before?$result:$before;
4842: }
4843: } elsif (($chunk eq '&') || ($chunk eq '|')) {
4844: $operand=$chunk;
4845: } else {
4846: my $new=directcondval($chunk);
4847: if ($operand eq '&') {
4848: $result=$result>$new?$new:$result;
4849: } else {
4850: $result=$result>$new?$result:$new;
4851: }
4852: }
4853: }
4854: }
4855: return $result;
4856: }
4857:
4858: # ---------------------------------------------------- Devalidate courseresdata
4859:
4860: sub devalidatecourseresdata {
4861: my ($coursenum,$coursedomain)=@_;
4862: my $hashid=$coursenum.':'.$coursedomain;
4863: &devalidate_cache_new('courseres',$hashid);
4864: }
4865:
4866: # --------------------------------------------------- Course Resourcedata Query
4867:
4868: sub get_courseresdata {
4869: my ($coursenum,$coursedomain)=@_;
4870: my $coursehom=&homeserver($coursenum,$coursedomain);
4871: my $hashid=$coursenum.':'.$coursedomain;
4872: my ($result,$cached)=&is_cached_new('courseres',$hashid);
4873: my %dumpreply;
4874: unless (defined($cached)) {
4875: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
4876: $result=\%dumpreply;
4877: my ($tmp) = keys(%dumpreply);
4878: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
4879: &do_cache_new('courseres',$hashid,$result,600);
4880: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4881: return $tmp;
4882: } elsif ($tmp =~ /^(error)/) {
4883: $result=undef;
4884: &do_cache_new('courseres',$hashid,$result,600);
4885: }
4886: }
4887: return $result;
4888: }
4889:
4890: sub devalidateuserresdata {
4891: my ($uname,$udom)=@_;
4892: my $hashid="$udom:$uname";
4893: &devalidate_cache_new('userres',$hashid);
4894: }
4895:
4896: sub get_userresdata {
4897: my ($uname,$udom)=@_;
4898: #most student don\'t have any data set, check if there is some data
4899: if (&EXT_cache_status($udom,$uname)) { return undef; }
4900:
4901: my $hashid="$udom:$uname";
4902: my ($result,$cached)=&is_cached_new('userres',$hashid);
4903: if (!defined($cached)) {
4904: my %resourcedata=&dump('resourcedata',$udom,$uname);
4905: $result=\%resourcedata;
4906: &do_cache_new('userres',$hashid,$result,600);
4907: }
4908: my ($tmp)=keys(%$result);
4909: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4910: return $result;
4911: }
4912: #error 2 occurs when the .db doesn't exist
4913: if ($tmp!~/error: 2 /) {
4914: &logthis("<font color=\"blue\">WARNING:".
4915: " Trying to get resource data for ".
4916: $uname." at ".$udom.": ".
4917: $tmp."</font>");
4918: } elsif ($tmp=~/error: 2 /) {
4919: #&EXT_cache_set($udom,$uname);
4920: &do_cache_new('userres',$hashid,undef,600);
4921: undef($tmp); # not really an error so don't send it back
4922: }
4923: return $tmp;
4924: }
4925:
4926: sub resdata {
4927: my ($name,$domain,$type,@which)=@_;
4928: my $result;
4929: if ($type eq 'course') {
4930: $result=&get_courseresdata($name,$domain);
4931: } elsif ($type eq 'user') {
4932: $result=&get_userresdata($name,$domain);
4933: }
4934: if (!ref($result)) { return $result; }
4935: foreach my $item (@which) {
4936: if (defined($result->{$item})) {
4937: return $result->{$item};
4938: }
4939: }
4940: return undef;
4941: }
4942:
4943: #
4944: # EXT resource caching routines
4945: #
4946:
4947: sub clear_EXT_cache_status {
4948: &delenv('cache.EXT.');
4949: }
4950:
4951: sub EXT_cache_status {
4952: my ($target_domain,$target_user) = @_;
4953: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4954: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
4955: # We know already the user has no data
4956: return 1;
4957: } else {
4958: return 0;
4959: }
4960: }
4961:
4962: sub EXT_cache_set {
4963: my ($target_domain,$target_user) = @_;
4964: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4965: #&appenv($cachename => time);
4966: }
4967:
4968: # --------------------------------------------------------- Value of a Variable
4969: sub EXT {
4970:
4971: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
4972: unless ($varname) { return ''; }
4973: #get real user name/domain, courseid and symb
4974: my $courseid;
4975: my $publicuser;
4976: if ($symbparm) {
4977: $symbparm=&get_symb_from_alias($symbparm);
4978: }
4979: if (!($uname && $udom)) {
4980: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
4981: &Apache::lonxml::whichuser($symbparm);
4982: if (!$symbparm) { $symbparm=$cursymb; }
4983: } else {
4984: $courseid=$env{'request.course.id'};
4985: }
4986: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
4987: my $rest;
4988: if (defined($therest[0])) {
4989: $rest=join('.',@therest);
4990: } else {
4991: $rest='';
4992: }
4993:
4994: my $qualifierrest=$qualifier;
4995: if ($rest) { $qualifierrest.='.'.$rest; }
4996: my $spacequalifierrest=$space;
4997: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
4998: if ($realm eq 'user') {
4999: # --------------------------------------------------------------- user.resource
5000: if ($space eq 'resource') {
5001: if ( (defined($Apache::lonhomework::parsing_a_problem)
5002: || defined($Apache::lonhomework::parsing_a_task))
5003: &&
5004: ($symbparm eq &symbread()) ) {
5005: return $Apache::lonhomework::history{$qualifierrest};
5006: } else {
5007: my %restored;
5008: if ($publicuser || $env{'request.state'} eq 'construct') {
5009: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
5010: } else {
5011: %restored=&restore($symbparm,$courseid,$udom,$uname);
5012: }
5013: return $restored{$qualifierrest};
5014: }
5015: # ----------------------------------------------------------------- user.access
5016: } elsif ($space eq 'access') {
5017: # FIXME - not supporting calls for a specific user
5018: return &allowed($qualifier,$rest);
5019: # ------------------------------------------ user.preferences, user.environment
5020: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
5021: if (($uname eq $env{'user.name'}) &&
5022: ($udom eq $env{'user.domain'})) {
5023: return $env{join('.',('environment',$qualifierrest))};
5024: } else {
5025: my %returnhash;
5026: if (!$publicuser) {
5027: %returnhash=&userenvironment($udom,$uname,
5028: $qualifierrest);
5029: }
5030: return $returnhash{$qualifierrest};
5031: }
5032: # ----------------------------------------------------------------- user.course
5033: } elsif ($space eq 'course') {
5034: # FIXME - not supporting calls for a specific user
5035: return $env{join('.',('request.course',$qualifier))};
5036: # ------------------------------------------------------------------- user.role
5037: } elsif ($space eq 'role') {
5038: # FIXME - not supporting calls for a specific user
5039: my ($role,$where)=split(/\./,$env{'request.role'});
5040: if ($qualifier eq 'value') {
5041: return $role;
5042: } elsif ($qualifier eq 'extent') {
5043: return $where;
5044: }
5045: # ----------------------------------------------------------------- user.domain
5046: } elsif ($space eq 'domain') {
5047: return $udom;
5048: # ------------------------------------------------------------------- user.name
5049: } elsif ($space eq 'name') {
5050: return $uname;
5051: # ---------------------------------------------------- Any other user namespace
5052: } else {
5053: my %reply;
5054: if (!$publicuser) {
5055: %reply=&get($space,[$qualifierrest],$udom,$uname);
5056: }
5057: return $reply{$qualifierrest};
5058: }
5059: } elsif ($realm eq 'query') {
5060: # ---------------------------------------------- pull stuff out of query string
5061: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
5062: [$spacequalifierrest]);
5063: return $env{'form.'.$spacequalifierrest};
5064: } elsif ($realm eq 'request') {
5065: # ------------------------------------------------------------- request.browser
5066: if ($space eq 'browser') {
5067: if ($qualifier eq 'textremote') {
5068: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
5069: return 1;
5070: } else {
5071: return 0;
5072: }
5073: } else {
5074: return $env{'browser.'.$qualifier};
5075: }
5076: # ------------------------------------------------------------ request.filename
5077: } else {
5078: return $env{'request.'.$spacequalifierrest};
5079: }
5080: } elsif ($realm eq 'course') {
5081: # ---------------------------------------------------------- course.description
5082: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
5083: } elsif ($realm eq 'resource') {
5084:
5085: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
5086: if (!$symbparm) { $symbparm=&symbread(); }
5087: }
5088:
5089: if ($space eq 'title') {
5090: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
5091: return &gettitle($symbparm);
5092: }
5093:
5094: if ($space eq 'map') {
5095: my ($map) = &decode_symb($symbparm);
5096: return &symbread($map);
5097: }
5098:
5099: my ($section, $group, @groups);
5100: my ($courselevelm,$courselevel);
5101: if ($symbparm && defined($courseid) &&
5102: $courseid eq $env{'request.course.id'}) {
5103:
5104: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
5105:
5106: # ----------------------------------------------------- Cascading lookup scheme
5107: my $symbp=$symbparm;
5108: my $mapp=(&decode_symb($symbp))[0];
5109:
5110: my $symbparm=$symbp.'.'.$spacequalifierrest;
5111: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
5112:
5113: if (($env{'user.name'} eq $uname) &&
5114: ($env{'user.domain'} eq $udom)) {
5115: $section=$env{'request.course.sec'};
5116: @groups=&sort_course_groups($env{'request.course.groups'},$courseid);
5117: } else {
5118: if (! defined($usection)) {
5119: $section=&getsection($udom,$uname,$courseid);
5120: } else {
5121: $section = $usection;
5122: }
5123: my $grouplist = &get_users_groups($udom,$uname,$courseid);
5124: if ($grouplist) {
5125: @groups=&sort_course_groups($grouplist,$courseid);
5126: }
5127: }
5128:
5129: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
5130: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
5131: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
5132:
5133: $courselevel=$courseid.'.'.$spacequalifierrest;
5134: my $courselevelr=$courseid.'.'.$symbparm;
5135: $courselevelm=$courseid.'.'.$mapparm;
5136:
5137: # ----------------------------------------------------------- first, check user
5138:
5139: my $userreply=&resdata($uname,$udom,'user',
5140: ($courselevelr,$courselevelm,
5141: $courselevel));
5142: if (defined($userreply)) { return $userreply; }
5143:
5144: # ------------------------------------------------ second, check some of course
5145: my $coursereply;
5146: if (@groups > 0) {
5147: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
5148: $mapparm,$spacequalifierrest);
5149: if (defined($coursereply)) { return $coursereply; }
5150: }
5151:
5152: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
5153: $env{'course.'.$courseid.'.domain'},
5154: 'course',
5155: ($seclevelr,$seclevelm,$seclevel,
5156: $courselevelr));
5157: if (defined($coursereply)) { return $coursereply; }
5158:
5159: # ------------------------------------------------------ third, check map parms
5160: my %parmhash=();
5161: my $thisparm='';
5162: if (tie(%parmhash,'GDBM_File',
5163: $env{'request.course.fn'}.'_parms.db',
5164: &GDBM_READER(),0640)) {
5165: $thisparm=$parmhash{$symbparm};
5166: untie(%parmhash);
5167: }
5168: if ($thisparm) { return $thisparm; }
5169: }
5170: # ------------------------------------------ fourth, look in resource metadata
5171:
5172: $spacequalifierrest=~s/\./\_/;
5173: my $filename;
5174: if (!$symbparm) { $symbparm=&symbread(); }
5175: if ($symbparm) {
5176: $filename=(&decode_symb($symbparm))[2];
5177: } else {
5178: $filename=$env{'request.filename'};
5179: }
5180: my $metadata=&metadata($filename,$spacequalifierrest);
5181: if (defined($metadata)) { return $metadata; }
5182: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
5183: if (defined($metadata)) { return $metadata; }
5184:
5185: # ---------------------------------------------- fourth, look in rest pf course
5186: if ($symbparm && defined($courseid) &&
5187: $courseid eq $env{'request.course.id'}) {
5188: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
5189: $env{'course.'.$courseid.'.domain'},
5190: 'course',
5191: ($courselevelm,$courselevel));
5192: if (defined($coursereply)) { return $coursereply; }
5193: }
5194: # ------------------------------------------------------------------ Cascade up
5195: unless ($space eq '0') {
5196: my @parts=split(/_/,$space);
5197: my $id=pop(@parts);
5198: my $part=join('_',@parts);
5199: if ($part eq '') { $part='0'; }
5200: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
5201: $symbparm,$udom,$uname,$section,1);
5202: if (defined($partgeneral)) { return $partgeneral; }
5203: }
5204: if ($recurse) { return undef; }
5205: my $pack_def=&packages_tab_default($filename,$varname);
5206: if (defined($pack_def)) { return $pack_def; }
5207:
5208: # ---------------------------------------------------- Any other user namespace
5209: } elsif ($realm eq 'environment') {
5210: # ----------------------------------------------------------------- environment
5211: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
5212: return $env{'environment.'.$spacequalifierrest};
5213: } else {
5214: my %returnhash=&userenvironment($udom,$uname,
5215: $spacequalifierrest);
5216: return $returnhash{$spacequalifierrest};
5217: }
5218: } elsif ($realm eq 'system') {
5219: # ----------------------------------------------------------------- system.time
5220: if ($space eq 'time') {
5221: return time;
5222: }
5223: } elsif ($realm eq 'server') {
5224: # ----------------------------------------------------------------- system.time
5225: if ($space eq 'name') {
5226: return $ENV{'SERVER_NAME'};
5227: }
5228: }
5229: return '';
5230: }
5231:
5232: sub check_group_parms {
5233: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
5234: my @groupitems = ();
5235: my $resultitem;
5236: my @levels = ($symbparm,$mapparm,$what);
5237: foreach my $group (@{$groups}) {
5238: foreach my $level (@levels) {
5239: my $item = $courseid.'.['.$group.'].'.$level;
5240: push(@groupitems,$item);
5241: }
5242: }
5243: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
5244: $env{'course.'.$courseid.'.domain'},
5245: 'course',@groupitems);
5246: return $coursereply;
5247: }
5248:
5249: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
5250: my ($grouplist,$courseid) = @_;
5251: my @groups = sort(split(/:/,$grouplist));
5252: return @groups;
5253: }
5254:
5255: sub packages_tab_default {
5256: my ($uri,$varname)=@_;
5257: my (undef,$part,$name)=split(/\./,$varname);
5258: my $packages=&metadata($uri,'packages');
5259: foreach my $package (split(/,/,$packages)) {
5260: my ($pack_type,$pack_part)=split(/_/,$package,2);
5261: if (defined($packagetab{"$pack_type&$name&default"})) {
5262: return $packagetab{"$pack_type&$name&default"};
5263: }
5264: if ($pack_type eq 'part') { $pack_part='0'; }
5265: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
5266: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
5267: }
5268: }
5269: return undef;
5270: }
5271:
5272: sub add_prefix_and_part {
5273: my ($prefix,$part)=@_;
5274: my $keyroot;
5275: if (defined($prefix) && $prefix !~ /^__/) {
5276: # prefix that has a part already
5277: $keyroot=$prefix;
5278: } elsif (defined($prefix)) {
5279: # prefix that is missing a part
5280: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
5281: } else {
5282: # no prefix at all
5283: if (defined($part)) { $keyroot='_'.$part; }
5284: }
5285: return $keyroot;
5286: }
5287:
5288: # ---------------------------------------------------------------- Get metadata
5289:
5290: my %metaentry;
5291: sub metadata {
5292: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
5293: $uri=&declutter($uri);
5294: # if it is a non metadata possible uri return quickly
5295: if (($uri eq '') ||
5296: (($uri =~ m|^/*adm/|) &&
5297: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
5298: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
5299: ($uri =~ m|home/[^/]+/public_html/|)) {
5300: return undef;
5301: }
5302: my $filename=$uri;
5303: $uri=~s/\.meta$//;
5304: #
5305: # Is the metadata already cached?
5306: # Look at timestamp of caching
5307: # Everything is cached by the main uri, libraries are never directly cached
5308: #
5309: if (!defined($liburi)) {
5310: my ($result,$cached)=&is_cached_new('meta',$uri);
5311: if (defined($cached)) { return $result->{':'.$what}; }
5312: }
5313: {
5314: #
5315: # Is this a recursive call for a library?
5316: #
5317: # if (! exists($metacache{$uri})) {
5318: # $metacache{$uri}={};
5319: # }
5320: if ($liburi) {
5321: $liburi=&declutter($liburi);
5322: $filename=$liburi;
5323: } else {
5324: &devalidate_cache_new('meta',$uri);
5325: undef(%metaentry);
5326: }
5327: my %metathesekeys=();
5328: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
5329: my $metastring;
5330: if ($uri !~ m -^(uploaded|editupload)/-) {
5331: my $file=&filelocation('',&clutter($filename));
5332: #push(@{$metaentry{$uri.'.file'}},$file);
5333: $metastring=&getfile($file);
5334: }
5335: my $parser=HTML::LCParser->new(\$metastring);
5336: my $token;
5337: undef %metathesekeys;
5338: while ($token=$parser->get_token) {
5339: if ($token->[0] eq 'S') {
5340: if (defined($token->[2]->{'package'})) {
5341: #
5342: # This is a package - get package info
5343: #
5344: my $package=$token->[2]->{'package'};
5345: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5346: if (defined($token->[2]->{'id'})) {
5347: $keyroot.='_'.$token->[2]->{'id'};
5348: }
5349: if ($metaentry{':packages'}) {
5350: $metaentry{':packages'}.=','.$package.$keyroot;
5351: } else {
5352: $metaentry{':packages'}=$package.$keyroot;
5353: }
5354: foreach (sort keys %packagetab) {
5355: my $part=$keyroot;
5356: $part=~s/^\_//;
5357: if ($_=~/^\Q$package\E\&/ ||
5358: $_=~/^\Q$package\E_0\&/) {
5359: my ($pack,$name,$subp)=split(/\&/,$_);
5360: # ignore package.tab specified default values
5361: # here &package_tab_default() will fetch those
5362: if ($subp eq 'default') { next; }
5363: my $value=$packagetab{$_};
5364: my $unikey;
5365: if ($pack =~ /_0$/) {
5366: $unikey='parameter_0_'.$name;
5367: $part=0;
5368: } else {
5369: $unikey='parameter'.$keyroot.'_'.$name;
5370: }
5371: if ($subp eq 'display') {
5372: $value.=' [Part: '.$part.']';
5373: }
5374: $metaentry{':'.$unikey.'.part'}=$part;
5375: $metathesekeys{$unikey}=1;
5376: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
5377: $metaentry{':'.$unikey.'.'.$subp}=$value;
5378: }
5379: if (defined($metaentry{':'.$unikey.'.default'})) {
5380: $metaentry{':'.$unikey}=
5381: $metaentry{':'.$unikey.'.default'};
5382: }
5383: }
5384: }
5385: } else {
5386: #
5387: # This is not a package - some other kind of start tag
5388: #
5389: my $entry=$token->[1];
5390: my $unikey;
5391: if ($entry eq 'import') {
5392: $unikey='';
5393: } else {
5394: $unikey=$entry;
5395: }
5396: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5397:
5398: if (defined($token->[2]->{'id'})) {
5399: $unikey.='_'.$token->[2]->{'id'};
5400: }
5401:
5402: if ($entry eq 'import') {
5403: #
5404: # Importing a library here
5405: #
5406: if ($depthcount<20) {
5407: my $location=$parser->get_text('/import');
5408: my $dir=$filename;
5409: $dir=~s|[^/]*$||;
5410: $location=&filelocation($dir,$location);
5411: foreach (sort(split(/\,/,&metadata($uri,'keys',
5412: $location,$unikey,
5413: $depthcount+1)))) {
5414: $metaentry{':'.$_}=$metaentry{':'.$_};
5415: $metathesekeys{$_}=1;
5416: }
5417: }
5418: } else {
5419:
5420: if (defined($token->[2]->{'name'})) {
5421: $unikey.='_'.$token->[2]->{'name'};
5422: }
5423: $metathesekeys{$unikey}=1;
5424: foreach (@{$token->[3]}) {
5425: $metaentry{':'.$unikey.'.'.$_}=$token->[2]->{$_};
5426: }
5427: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
5428: my $default=$metaentry{':'.$unikey.'.default'};
5429: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
5430: # only ws inside the tag, and not in default, so use default
5431: # as value
5432: $metaentry{':'.$unikey}=$default;
5433: } else {
5434: # either something interesting inside the tag or default
5435: # uninteresting
5436: $metaentry{':'.$unikey}=$internaltext;
5437: }
5438: # end of not-a-package not-a-library import
5439: }
5440: # end of not-a-package start tag
5441: }
5442: # the next is the end of "start tag"
5443: }
5444: }
5445: my ($extension) = ($uri =~ /\.(\w+)$/);
5446: foreach my $key (sort(keys(%packagetab))) {
5447: #no specific packages #how's our extension
5448: if ($key!~/^extension_\Q$extension\E&/) { next; }
5449: &metadata_create_package_def($uri,$key,'extension_'.$extension,
5450: \%metathesekeys);
5451: }
5452: if (!exists($metaentry{':packages'})) {
5453: foreach my $key (sort(keys(%packagetab))) {
5454: #no specific packages well let's get default then
5455: if ($key!~/^default&/) { next; }
5456: &metadata_create_package_def($uri,$key,'default',
5457: \%metathesekeys);
5458: }
5459: }
5460: # are there custom rights to evaluate
5461: if ($metaentry{':copyright'} eq 'custom') {
5462:
5463: #
5464: # Importing a rights file here
5465: #
5466: unless ($depthcount) {
5467: my $location=$metaentry{':customdistributionfile'};
5468: my $dir=$filename;
5469: $dir=~s|[^/]*$||;
5470: $location=&filelocation($dir,$location);
5471: foreach (sort(split(/\,/,&metadata($uri,'keys',
5472: $location,'_rights',
5473: $depthcount+1)))) {
5474: #$metaentry{':'.$_}=$metacache{$uri}->{':'.$_};
5475: $metathesekeys{$_}=1;
5476: }
5477: }
5478: }
5479: $metaentry{':keys'}=join(',',keys %metathesekeys);
5480: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
5481: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
5482: &do_cache_new('meta',$uri,\%metaentry,60*60);
5483: # this is the end of "was not already recently cached
5484: }
5485: return $metaentry{':'.$what};
5486: }
5487:
5488: sub metadata_create_package_def {
5489: my ($uri,$key,$package,$metathesekeys)=@_;
5490: my ($pack,$name,$subp)=split(/\&/,$key);
5491: if ($subp eq 'default') { next; }
5492:
5493: if (defined($metaentry{':packages'})) {
5494: $metaentry{':packages'}.=','.$package;
5495: } else {
5496: $metaentry{':packages'}=$package;
5497: }
5498: my $value=$packagetab{$key};
5499: my $unikey;
5500: $unikey='parameter_0_'.$name;
5501: $metaentry{':'.$unikey.'.part'}=0;
5502: $$metathesekeys{$unikey}=1;
5503: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
5504: $metaentry{':'.$unikey.'.'.$subp}=$value;
5505: }
5506: if (defined($metaentry{':'.$unikey.'.default'})) {
5507: $metaentry{':'.$unikey}=
5508: $metaentry{':'.$unikey.'.default'};
5509: }
5510: }
5511:
5512: sub metadata_generate_part0 {
5513: my ($metadata,$metacache,$uri) = @_;
5514: my %allnames;
5515: foreach my $metakey (sort keys %$metadata) {
5516: if ($metakey=~/^parameter\_(.*)/) {
5517: my $part=$$metacache{':'.$metakey.'.part'};
5518: my $name=$$metacache{':'.$metakey.'.name'};
5519: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
5520: $allnames{$name}=$part;
5521: }
5522: }
5523: }
5524: foreach my $name (keys(%allnames)) {
5525: $$metadata{"parameter_0_$name"}=1;
5526: my $key=":parameter_0_$name";
5527: $$metacache{"$key.part"}='0';
5528: $$metacache{"$key.name"}=$name;
5529: $$metacache{"$key.type"}=$$metacache{':parameter_'.
5530: $allnames{$name}.'_'.$name.
5531: '.type'};
5532: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
5533: '.display'};
5534: my $expr='[Part: '.$allnames{$name}.']';
5535: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
5536: $$metacache{"$key.display"}=$olddis;
5537: }
5538: }
5539:
5540: # ------------------------------------------------- Get the title of a resource
5541:
5542: sub gettitle {
5543: my $urlsymb=shift;
5544: my $symb=&symbread($urlsymb);
5545: if ($symb) {
5546: my $key=$env{'request.course.id'}."\0".$symb;
5547: my ($result,$cached)=&is_cached_new('title',$key);
5548: if (defined($cached)) {
5549: return $result;
5550: }
5551: my ($map,$resid,$url)=&decode_symb($symb);
5552: my $title='';
5553: my %bighash;
5554: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5555: &GDBM_READER(),0640)) {
5556: my $mapid=$bighash{'map_pc_'.&clutter($map)};
5557: $title=$bighash{'title_'.$mapid.'.'.$resid};
5558: untie %bighash;
5559: }
5560: $title=~s/\&colon\;/\:/gs;
5561: if ($title) {
5562: return &do_cache_new('title',$key,$title,600);
5563: }
5564: $urlsymb=$url;
5565: }
5566: my $title=&metadata($urlsymb,'title');
5567: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
5568: return $title;
5569: }
5570:
5571: sub get_slot {
5572: my ($which,$cnum,$cdom)=@_;
5573: if (!$cnum || !$cdom) {
5574: (undef,my $courseid)=&Apache::lonxml::whichuser();
5575: $cdom=$env{'course.'.$courseid.'.domain'};
5576: $cnum=$env{'course.'.$courseid.'.num'};
5577: }
5578: my $key=join("\0",'slots',$cdom,$cnum,$which);
5579: my %slotinfo;
5580: if (exists($remembered{$key})) {
5581: $slotinfo{$which} = $remembered{$key};
5582: } else {
5583: %slotinfo=&get('slots',[$which],$cdom,$cnum);
5584: &Apache::lonhomework::showhash(%slotinfo);
5585: my ($tmp)=keys(%slotinfo);
5586: if ($tmp=~/^error:/) { return (); }
5587: $remembered{$key} = $slotinfo{$which};
5588: }
5589: if (ref($slotinfo{$which}) eq 'HASH') {
5590: return %{$slotinfo{$which}};
5591: }
5592: return $slotinfo{$which};
5593: }
5594: # ------------------------------------------------- Update symbolic store links
5595:
5596: sub symblist {
5597: my ($mapname,%newhash)=@_;
5598: $mapname=&deversion(&declutter($mapname));
5599: my %hash;
5600: if (($env{'request.course.fn'}) && (%newhash)) {
5601: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5602: &GDBM_WRCREAT(),0640)) {
5603: foreach my $url (keys %newhash) {
5604: next if ($url eq 'last_known'
5605: && $env{'form.no_update_last_known'});
5606: $hash{declutter($url)}=&encode_symb($mapname,
5607: $newhash{$url}->[1],
5608: $newhash{$url}->[0]);
5609: }
5610: if (untie(%hash)) {
5611: return 'ok';
5612: }
5613: }
5614: }
5615: return 'error';
5616: }
5617:
5618: # --------------------------------------------------------------- Verify a symb
5619:
5620: sub symbverify {
5621: my ($symb,$thisurl)=@_;
5622: my $thisfn=$thisurl;
5623: # wrapper not part of symbs
5624: $thisfn=~s/^\/adm\/wrapper//;
5625: $thisfn=~s/^\/adm\/coursedocs\/showdoc\///;
5626: $thisfn=&declutter($thisfn);
5627: # direct jump to resource in page or to a sequence - will construct own symbs
5628: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
5629: # check URL part
5630: my ($map,$resid,$url)=&decode_symb($symb);
5631:
5632: unless ($url eq $thisfn) { return 0; }
5633:
5634: $symb=&symbclean($symb);
5635: $thisurl=&deversion($thisurl);
5636: $thisfn=&deversion($thisfn);
5637:
5638: my %bighash;
5639: my $okay=0;
5640:
5641: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5642: &GDBM_READER(),0640)) {
5643: my $ids=$bighash{'ids_'.&clutter($thisurl)};
5644: unless ($ids) {
5645: $ids=$bighash{'ids_/'.$thisurl};
5646: }
5647: if ($ids) {
5648: # ------------------------------------------------------------------- Has ID(s)
5649: foreach (split(/\,/,$ids)) {
5650: my ($mapid,$resid)=split(/\./,$_);
5651: if (
5652: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
5653: eq $symb) {
5654: if (($env{'request.role.adv'}) ||
5655: $bighash{'encrypted_'.$_} eq $env{'request.enc'}) {
5656: $okay=1;
5657: }
5658: }
5659: }
5660: }
5661: untie(%bighash);
5662: }
5663: return $okay;
5664: }
5665:
5666: # --------------------------------------------------------------- Clean-up symb
5667:
5668: sub symbclean {
5669: my $symb=shift;
5670: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
5671: # remove version from map
5672: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
5673:
5674: # remove version from URL
5675: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
5676:
5677: # remove wrapper
5678:
5679: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
5680: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
5681: return $symb;
5682: }
5683:
5684: # ---------------------------------------------- Split symb to find map and url
5685:
5686: sub encode_symb {
5687: my ($map,$resid,$url)=@_;
5688: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
5689: }
5690:
5691: sub decode_symb {
5692: my $symb=shift;
5693: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
5694: my ($map,$resid,$url)=split(/___/,$symb);
5695: return (&fixversion($map),$resid,&fixversion($url));
5696: }
5697:
5698: sub fixversion {
5699: my $fn=shift;
5700: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
5701: my %bighash;
5702: my $uri=&clutter($fn);
5703: my $key=$env{'request.course.id'}.'_'.$uri;
5704: # is this cached?
5705: my ($result,$cached)=&is_cached_new('courseresversion',$key);
5706: if (defined($cached)) { return $result; }
5707: # unfortunately not cached, or expired
5708: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5709: &GDBM_READER(),0640)) {
5710: if ($bighash{'version_'.$uri}) {
5711: my $version=$bighash{'version_'.$uri};
5712: unless (($version eq 'mostrecent') ||
5713: ($version==&getversion($uri))) {
5714: $uri=~s/\.(\w+)$/\.$version\.$1/;
5715: }
5716: }
5717: untie %bighash;
5718: }
5719: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
5720: }
5721:
5722: sub deversion {
5723: my $url=shift;
5724: $url=~s/\.\d+\.(\w+)$/\.$1/;
5725: return $url;
5726: }
5727:
5728: # ------------------------------------------------------ Return symb list entry
5729:
5730: sub symbread {
5731: my ($thisfn,$donotrecurse)=@_;
5732: my $cache_str='request.symbread.cached.'.$thisfn;
5733: if (defined($env{$cache_str})) { return $env{$cache_str}; }
5734: # no filename provided? try from environment
5735: unless ($thisfn) {
5736: if ($env{'request.symb'}) {
5737: return $env{$cache_str}=&symbclean($env{'request.symb'});
5738: }
5739: $thisfn=$env{'request.filename'};
5740: }
5741: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
5742: # is that filename actually a symb? Verify, clean, and return
5743: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
5744: if (&symbverify($thisfn,$1)) {
5745: return $env{$cache_str}=&symbclean($thisfn);
5746: }
5747: }
5748: $thisfn=declutter($thisfn);
5749: my %hash;
5750: my %bighash;
5751: my $syval='';
5752: if (($env{'request.course.fn'}) && ($thisfn)) {
5753: my $targetfn = $thisfn;
5754: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
5755: $targetfn = 'adm/wrapper/'.$thisfn;
5756: }
5757: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
5758: $targetfn=$1;
5759: }
5760: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5761: &GDBM_READER(),0640)) {
5762: $syval=$hash{$targetfn};
5763: untie(%hash);
5764: }
5765: # ---------------------------------------------------------- There was an entry
5766: if ($syval) {
5767: #unless ($syval=~/\_\d+$/) {
5768: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
5769: #&appenv('request.ambiguous' => $thisfn);
5770: #return $env{$cache_str}='';
5771: #}
5772: #$syval.=$1;
5773: #}
5774: } else {
5775: # ------------------------------------------------------- Was not in symb table
5776: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5777: &GDBM_READER(),0640)) {
5778: # ---------------------------------------------- Get ID(s) for current resource
5779: my $ids=$bighash{'ids_'.&clutter($thisfn)};
5780: unless ($ids) {
5781: $ids=$bighash{'ids_/'.$thisfn};
5782: }
5783: unless ($ids) {
5784: # alias?
5785: $ids=$bighash{'mapalias_'.$thisfn};
5786: }
5787: if ($ids) {
5788: # ------------------------------------------------------------------- Has ID(s)
5789: my @possibilities=split(/\,/,$ids);
5790: if ($#possibilities==0) {
5791: # ----------------------------------------------- There is only one possibility
5792: my ($mapid,$resid)=split(/\./,$ids);
5793: $syval=&encode_symb($bighash{'map_id_'.$mapid},
5794: $resid,$thisfn);
5795: } elsif (!$donotrecurse) {
5796: # ------------------------------------------ There is more than one possibility
5797: my $realpossible=0;
5798: foreach (@possibilities) {
5799: my $file=$bighash{'src_'.$_};
5800: if (&allowed('bre',$file)) {
5801: my ($mapid,$resid)=split(/\./,$_);
5802: if ($bighash{'map_type_'.$mapid} ne 'page') {
5803: $realpossible++;
5804: $syval=&encode_symb($bighash{'map_id_'.$mapid},
5805: $resid,$thisfn);
5806: }
5807: }
5808: }
5809: if ($realpossible!=1) { $syval=''; }
5810: } else {
5811: $syval='';
5812: }
5813: }
5814: untie(%bighash)
5815: }
5816: }
5817: if ($syval) {
5818: return $env{$cache_str}=$syval;
5819: }
5820: }
5821: &appenv('request.ambiguous' => $thisfn);
5822: return $env{$cache_str}='';
5823: }
5824:
5825: # ---------------------------------------------------------- Return random seed
5826:
5827: sub numval {
5828: my $txt=shift;
5829: $txt=~tr/A-J/0-9/;
5830: $txt=~tr/a-j/0-9/;
5831: $txt=~tr/K-T/0-9/;
5832: $txt=~tr/k-t/0-9/;
5833: $txt=~tr/U-Z/0-5/;
5834: $txt=~tr/u-z/0-5/;
5835: $txt=~s/\D//g;
5836: if ($_64bit) { if ($txt > 2**32) { return -1; } }
5837: return int($txt);
5838: }
5839:
5840: sub numval2 {
5841: my $txt=shift;
5842: $txt=~tr/A-J/0-9/;
5843: $txt=~tr/a-j/0-9/;
5844: $txt=~tr/K-T/0-9/;
5845: $txt=~tr/k-t/0-9/;
5846: $txt=~tr/U-Z/0-5/;
5847: $txt=~tr/u-z/0-5/;
5848: $txt=~s/\D//g;
5849: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5850: my $total;
5851: foreach my $val (@txts) { $total+=$val; }
5852: if ($_64bit) { if ($total > 2**32) { return -1; } }
5853: return int($total);
5854: }
5855:
5856: sub numval3 {
5857: use integer;
5858: my $txt=shift;
5859: $txt=~tr/A-J/0-9/;
5860: $txt=~tr/a-j/0-9/;
5861: $txt=~tr/K-T/0-9/;
5862: $txt=~tr/k-t/0-9/;
5863: $txt=~tr/U-Z/0-5/;
5864: $txt=~tr/u-z/0-5/;
5865: $txt=~s/\D//g;
5866: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5867: my $total;
5868: foreach my $val (@txts) { $total+=$val; }
5869: if ($_64bit) { $total=(($total<<32)>>32); }
5870: return $total;
5871: }
5872:
5873: sub digest {
5874: my ($data)=@_;
5875: my $digest=&Digest::MD5::md5($data);
5876: my ($a,$b,$c,$d)=unpack("iiii",$digest);
5877: my ($e,$f);
5878: {
5879: use integer;
5880: $e=($a+$b);
5881: $f=($c+$d);
5882: if ($_64bit) {
5883: $e=(($e<<32)>>32);
5884: $f=(($f<<32)>>32);
5885: }
5886: }
5887: if (wantarray) {
5888: return ($e,$f);
5889: } else {
5890: my $g;
5891: {
5892: use integer;
5893: $g=($e+$f);
5894: if ($_64bit) {
5895: $g=(($g<<32)>>32);
5896: }
5897: }
5898: return $g;
5899: }
5900: }
5901:
5902: sub latest_rnd_algorithm_id {
5903: return '64bit5';
5904: }
5905:
5906: sub get_rand_alg {
5907: my ($courseid)=@_;
5908: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
5909: if ($courseid) {
5910: return $env{"course.$courseid.rndseed"};
5911: }
5912: return &latest_rnd_algorithm_id();
5913: }
5914:
5915: sub validCODE {
5916: my ($CODE)=@_;
5917: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
5918: return 0;
5919: }
5920:
5921: sub getCODE {
5922: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
5923: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
5924: defined($Apache::lonhomework::parsing_a_task) ) &&
5925: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
5926: return $Apache::lonhomework::history{'resource.CODE'};
5927: }
5928: return undef;
5929: }
5930:
5931: sub rndseed {
5932: my ($symb,$courseid,$domain,$username)=@_;
5933:
5934: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
5935: if (!$symb) {
5936: unless ($symb=$wsymb) { return time; }
5937: }
5938: if (!$courseid) { $courseid=$wcourseid; }
5939: if (!$domain) { $domain=$wdomain; }
5940: if (!$username) { $username=$wusername }
5941: my $which=&get_rand_alg();
5942: if (defined(&getCODE())) {
5943: if ($which eq '64bit5') {
5944: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
5945: } elsif ($which eq '64bit4') {
5946: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
5947: } else {
5948: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
5949: }
5950: } elsif ($which eq '64bit5') {
5951: return &rndseed_64bit5($symb,$courseid,$domain,$username);
5952: } elsif ($which eq '64bit4') {
5953: return &rndseed_64bit4($symb,$courseid,$domain,$username);
5954: } elsif ($which eq '64bit3') {
5955: return &rndseed_64bit3($symb,$courseid,$domain,$username);
5956: } elsif ($which eq '64bit2') {
5957: return &rndseed_64bit2($symb,$courseid,$domain,$username);
5958: } elsif ($which eq '64bit') {
5959: return &rndseed_64bit($symb,$courseid,$domain,$username);
5960: }
5961: return &rndseed_32bit($symb,$courseid,$domain,$username);
5962: }
5963:
5964: sub rndseed_32bit {
5965: my ($symb,$courseid,$domain,$username)=@_;
5966: {
5967: use integer;
5968: my $symbchck=unpack("%32C*",$symb) << 27;
5969: my $symbseed=numval($symb) << 22;
5970: my $namechck=unpack("%32C*",$username) << 17;
5971: my $nameseed=numval($username) << 12;
5972: my $domainseed=unpack("%32C*",$domain) << 7;
5973: my $courseseed=unpack("%32C*",$courseid);
5974: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
5975: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5976: #&Apache::lonxml::debug("rndseed :$num:$symb");
5977: if ($_64bit) { $num=(($num<<32)>>32); }
5978: return $num;
5979: }
5980: }
5981:
5982: sub rndseed_64bit {
5983: my ($symb,$courseid,$domain,$username)=@_;
5984: {
5985: use integer;
5986: my $symbchck=unpack("%32S*",$symb) << 21;
5987: my $symbseed=numval($symb) << 10;
5988: my $namechck=unpack("%32S*",$username);
5989:
5990: my $nameseed=numval($username) << 21;
5991: my $domainseed=unpack("%32S*",$domain) << 10;
5992: my $courseseed=unpack("%32S*",$courseid);
5993:
5994: my $num1=$symbchck+$symbseed+$namechck;
5995: my $num2=$nameseed+$domainseed+$courseseed;
5996: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5997: #&Apache::lonxml::debug("rndseed :$num:$symb");
5998: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5999: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6000: return "$num1,$num2";
6001: }
6002: }
6003:
6004: sub rndseed_64bit2 {
6005: my ($symb,$courseid,$domain,$username)=@_;
6006: {
6007: use integer;
6008: # strings need to be an even # of cahracters long, it it is odd the
6009: # last characters gets thrown away
6010: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6011: my $symbseed=numval($symb) << 10;
6012: my $namechck=unpack("%32S*",$username.' ');
6013:
6014: my $nameseed=numval($username) << 21;
6015: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6016: my $courseseed=unpack("%32S*",$courseid.' ');
6017:
6018: my $num1=$symbchck+$symbseed+$namechck;
6019: my $num2=$nameseed+$domainseed+$courseseed;
6020: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6021: #&Apache::lonxml::debug("rndseed :$num:$symb");
6022: return "$num1,$num2";
6023: }
6024: }
6025:
6026: sub rndseed_64bit3 {
6027: my ($symb,$courseid,$domain,$username)=@_;
6028: {
6029: use integer;
6030: # strings need to be an even # of cahracters long, it it is odd the
6031: # last characters gets thrown away
6032: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6033: my $symbseed=numval2($symb) << 10;
6034: my $namechck=unpack("%32S*",$username.' ');
6035:
6036: my $nameseed=numval2($username) << 21;
6037: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6038: my $courseseed=unpack("%32S*",$courseid.' ');
6039:
6040: my $num1=$symbchck+$symbseed+$namechck;
6041: my $num2=$nameseed+$domainseed+$courseseed;
6042: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6043: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
6044: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6045:
6046: return "$num1:$num2";
6047: }
6048: }
6049:
6050: sub rndseed_64bit4 {
6051: my ($symb,$courseid,$domain,$username)=@_;
6052: {
6053: use integer;
6054: # strings need to be an even # of cahracters long, it it is odd the
6055: # last characters gets thrown away
6056: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6057: my $symbseed=numval3($symb) << 10;
6058: my $namechck=unpack("%32S*",$username.' ');
6059:
6060: my $nameseed=numval3($username) << 21;
6061: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6062: my $courseseed=unpack("%32S*",$courseid.' ');
6063:
6064: my $num1=$symbchck+$symbseed+$namechck;
6065: my $num2=$nameseed+$domainseed+$courseseed;
6066: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6067: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
6068: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6069:
6070: return "$num1:$num2";
6071: }
6072: }
6073:
6074: sub rndseed_64bit5 {
6075: my ($symb,$courseid,$domain,$username)=@_;
6076: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
6077: return "$num1:$num2";
6078: }
6079:
6080: sub rndseed_CODE_64bit {
6081: my ($symb,$courseid,$domain,$username)=@_;
6082: {
6083: use integer;
6084: my $symbchck=unpack("%32S*",$symb.' ') << 16;
6085: my $symbseed=numval2($symb);
6086: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
6087: my $CODEseed=numval(&getCODE());
6088: my $courseseed=unpack("%32S*",$courseid.' ');
6089: my $num1=$symbseed+$CODEchck;
6090: my $num2=$CODEseed+$courseseed+$symbchck;
6091: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
6092: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
6093: if ($_64bit) { $num1=(($num1<<32)>>32); }
6094: if ($_64bit) { $num2=(($num2<<32)>>32); }
6095: return "$num1:$num2";
6096: }
6097: }
6098:
6099: sub rndseed_CODE_64bit4 {
6100: my ($symb,$courseid,$domain,$username)=@_;
6101: {
6102: use integer;
6103: my $symbchck=unpack("%32S*",$symb.' ') << 16;
6104: my $symbseed=numval3($symb);
6105: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
6106: my $CODEseed=numval3(&getCODE());
6107: my $courseseed=unpack("%32S*",$courseid.' ');
6108: my $num1=$symbseed+$CODEchck;
6109: my $num2=$CODEseed+$courseseed+$symbchck;
6110: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
6111: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
6112: if ($_64bit) { $num1=(($num1<<32)>>32); }
6113: if ($_64bit) { $num2=(($num2<<32)>>32); }
6114: return "$num1:$num2";
6115: }
6116: }
6117:
6118: sub rndseed_CODE_64bit5 {
6119: my ($symb,$courseid,$domain,$username)=@_;
6120: my $code = &getCODE();
6121: my ($num1,$num2)=&digest("$symb,$courseid,$code");
6122: return "$num1:$num2";
6123: }
6124:
6125: sub setup_random_from_rndseed {
6126: my ($rndseed)=@_;
6127: if ($rndseed =~/([,:])/) {
6128: my ($num1,$num2)=split(/[,:]/,$rndseed);
6129: &Math::Random::random_set_seed(abs($num1),abs($num2));
6130: } else {
6131: &Math::Random::random_set_seed_from_phrase($rndseed);
6132: }
6133: }
6134:
6135: sub latest_receipt_algorithm_id {
6136: return 'receipt2';
6137: }
6138:
6139: sub recunique {
6140: my $fucourseid=shift;
6141: my $unique;
6142: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
6143: $unique=$env{"course.$fucourseid.internal.encseed"};
6144: } else {
6145: $unique=$perlvar{'lonReceipt'};
6146: }
6147: return unpack("%32C*",$unique);
6148: }
6149:
6150: sub recprefix {
6151: my $fucourseid=shift;
6152: my $prefix;
6153: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
6154: $prefix=$env{"course.$fucourseid.internal.encpref"};
6155: } else {
6156: $prefix=$perlvar{'lonHostID'};
6157: }
6158: return unpack("%32C*",$prefix);
6159: }
6160:
6161: sub ireceipt {
6162: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
6163: my $cuname=unpack("%32C*",$funame);
6164: my $cudom=unpack("%32C*",$fudom);
6165: my $cucourseid=unpack("%32C*",$fucourseid);
6166: my $cusymb=unpack("%32C*",$fusymb);
6167: my $cunique=&recunique($fucourseid);
6168: my $cpart=unpack("%32S*",$part);
6169: my $return =&recprefix($fucourseid).'-';
6170: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
6171: $env{'request.state'} eq 'construct') {
6172: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
6173: " and ".($cpart%$cudom));
6174:
6175: $return.= ($cunique%$cuname+
6176: $cunique%$cudom+
6177: $cusymb%$cuname+
6178: $cusymb%$cudom+
6179: $cucourseid%$cuname+
6180: $cucourseid%$cudom+
6181: $cpart%$cuname+
6182: $cpart%$cudom);
6183: } else {
6184: $return.= ($cunique%$cuname+
6185: $cunique%$cudom+
6186: $cusymb%$cuname+
6187: $cusymb%$cudom+
6188: $cucourseid%$cuname+
6189: $cucourseid%$cudom);
6190: }
6191: return $return;
6192: }
6193:
6194: sub receipt {
6195: my ($part)=@_;
6196: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
6197: return &ireceipt($name,$domain,$courseid,$symb,$part);
6198: }
6199:
6200: # ------------------------------------------------------------ Serves up a file
6201: # returns either the contents of the file or
6202: # -1 if the file doesn't exist
6203: #
6204: # if the target is a file that was uploaded via DOCS,
6205: # a check will be made to see if a current copy exists on the local server,
6206: # if it does this will be served, otherwise a copy will be retrieved from
6207: # the home server for the course and stored in /home/httpd/html/userfiles on
6208: # the local server.
6209:
6210: sub getfile {
6211: my ($file) = @_;
6212: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
6213: &repcopy($file);
6214: return &readfile($file);
6215: }
6216:
6217: sub repcopy_userfile {
6218: my ($file)=@_;
6219: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
6220: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
6221: my ($cdom,$cnum,$filename) =
6222: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
6223: my ($info,$rtncode);
6224: my $uri="/uploaded/$cdom/$cnum/$filename";
6225: if (-e "$file") {
6226: my @fileinfo = stat($file);
6227: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
6228: if ($lwpresp ne 'ok') {
6229: if ($rtncode eq '404') {
6230: unlink($file);
6231: }
6232: #my $ua=new LWP::UserAgent;
6233: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6234: #my $response=$ua->request($request);
6235: #if ($response->is_success()) {
6236: # return $response->content;
6237: # } else {
6238: # return -1;
6239: # }
6240: return -1;
6241: }
6242: if ($info < $fileinfo[9]) {
6243: return 'ok';
6244: }
6245: $info = '';
6246: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
6247: if ($lwpresp ne 'ok') {
6248: return -1;
6249: }
6250: } else {
6251: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
6252: if ($lwpresp ne 'ok') {
6253: my $ua=new LWP::UserAgent;
6254: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6255: my $response=$ua->request($request);
6256: if ($response->is_success()) {
6257: $info=$response->content;
6258: } else {
6259: return -1;
6260: }
6261: }
6262: my @parts = ($cdom,$cnum);
6263: if ($filename =~ m|^(.+)/[^/]+$|) {
6264: push @parts, split(/\//,$1);
6265: }
6266: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
6267: foreach my $part (@parts) {
6268: $path .= '/'.$part;
6269: if (!-e $path) {
6270: mkdir($path,0770);
6271: }
6272: }
6273: }
6274: open(FILE,">$file");
6275: print FILE $info;
6276: close(FILE);
6277: return 'ok';
6278: }
6279:
6280: sub tokenwrapper {
6281: my $uri=shift;
6282: $uri=~s|^http\://([^/]+)||;
6283: $uri=~s|^/||;
6284: $env{'user.environment'}=~/\/([^\/]+)\.id/;
6285: my $token=$1;
6286: my (undef,$udom,$uname,$file)=split('/',$uri,4);
6287: if ($udom && $uname && $file) {
6288: $file=~s|(\?\.*)*$||;
6289: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
6290: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
6291: (($uri=~/\?/)?'&':'?').'token='.$token.
6292: '&tokenissued='.$perlvar{'lonHostID'};
6293: } else {
6294: return '/adm/notfound.html';
6295: }
6296: }
6297:
6298: sub getuploaded {
6299: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
6300: $uri=~s/^\///;
6301: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
6302: my $ua=new LWP::UserAgent;
6303: my $request=new HTTP::Request($reqtype,$uri);
6304: my $response=$ua->request($request);
6305: $$rtncode = $response->code;
6306: if (! $response->is_success()) {
6307: return 'failed';
6308: }
6309: if ($reqtype eq 'HEAD') {
6310: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
6311: } elsif ($reqtype eq 'GET') {
6312: $$info = $response->content;
6313: }
6314: return 'ok';
6315: }
6316:
6317: sub readfile {
6318: my $file = shift;
6319: if ( (! -e $file ) || ($file eq '') ) { return -1; };
6320: my $fh;
6321: open($fh,"<$file");
6322: my $a='';
6323: while (<$fh>) { $a .=$_; }
6324: return $a;
6325: }
6326:
6327: sub filelocation {
6328: my ($dir,$file) = @_;
6329: my $location;
6330: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
6331:
6332: if ($file =~ m-^/adm/-) {
6333: $file=~s-^/adm/wrapper/-/-;
6334: $file=~s-^/adm/coursedocs/showdoc/-/-;
6335: }
6336: if ($file=~m:^/~:) { # is a contruction space reference
6337: $location = $file;
6338: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
6339: } elsif ($file=~m:^/home/[^/]*/public_html/:) {
6340: # is a correct contruction space reference
6341: $location = $file;
6342: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
6343: my ($udom,$uname,$filename)=
6344: ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
6345: my $home=&homeserver($uname,$udom);
6346: my $is_me=0;
6347: my @ids=¤t_machine_ids();
6348: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
6349: if ($is_me) {
6350: $location=&Apache::loncommon::propath($udom,$uname).
6351: '/userfiles/'.$filename;
6352: } else {
6353: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
6354: $udom.'/'.$uname.'/'.$filename;
6355: }
6356: } else {
6357: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
6358: $file=~s:^/res/:/:;
6359: if ( !( $file =~ m:^/:) ) {
6360: $location = $dir. '/'.$file;
6361: } else {
6362: $location = '/home/httpd/html/res'.$file;
6363: }
6364: }
6365: $location=~s://+:/:g; # remove duplicate /
6366: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
6367: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
6368: return $location;
6369: }
6370:
6371: sub hreflocation {
6372: my ($dir,$file)=@_;
6373: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
6374: $file=filelocation($dir,$file);
6375: } elsif ($file=~m-^/adm/-) {
6376: $file=~s-^/adm/wrapper/-/-;
6377: $file=~s-^/adm/coursedocs/showdoc/-/-;
6378: }
6379: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
6380: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
6381: } elsif ($file=~m-/home/(\w+)/public_html/-) {
6382: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
6383: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
6384: $file=~s-^/home/httpd/lonUsers/([^/]*)/./././([^/]*)/userfiles/
6385: -/uploaded/$1/$2/-x;
6386: }
6387: return $file;
6388: }
6389:
6390: sub current_machine_domains {
6391: my $hostname=$hostname{$perlvar{'lonHostID'}};
6392: my @domains;
6393: while( my($id, $name) = each(%hostname)) {
6394: # &logthis("-$id-$name-$hostname-");
6395: if ($hostname eq $name) {
6396: push(@domains,$hostdom{$id});
6397: }
6398: }
6399: return @domains;
6400: }
6401:
6402: sub current_machine_ids {
6403: my $hostname=$hostname{$perlvar{'lonHostID'}};
6404: my @ids;
6405: while( my($id, $name) = each(%hostname)) {
6406: # &logthis("-$id-$name-$hostname-");
6407: if ($hostname eq $name) {
6408: push(@ids,$id);
6409: }
6410: }
6411: return @ids;
6412: }
6413:
6414: # ------------------------------------------------------------- Declutters URLs
6415:
6416: sub declutter {
6417: my $thisfn=shift;
6418: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
6419: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
6420: $thisfn=~s/^\///;
6421: $thisfn=~s|^adm/wrapper/||;
6422: $thisfn=~s|^adm/coursedocs/showdoc/||;
6423: $thisfn=~s/^res\///;
6424: $thisfn=~s/\?.+$//;
6425: return $thisfn;
6426: }
6427:
6428: # ------------------------------------------------------------- Clutter up URLs
6429:
6430: sub clutter {
6431: my $thisfn='/'.&declutter(shift);
6432: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
6433: $thisfn='/res'.$thisfn;
6434: }
6435: if ($thisfn !~m|/adm|) {
6436: if ($thisfn =~ m|/ext/|) {
6437: $thisfn='/adm/wrapper'.$thisfn;
6438: } else {
6439: my ($ext) = ($thisfn =~ /\.(\w+)$/);
6440: my $embstyle=&Apache::loncommon::fileembstyle($ext);
6441: if ($embstyle eq 'ssi'
6442: || ($embstyle eq 'hdn')
6443: || ($embstyle eq 'rat')
6444: || ($embstyle eq 'prv')
6445: || ($embstyle eq 'ign')) {
6446: #do nothing with these
6447: } elsif (($embstyle eq 'img')
6448: || ($embstyle eq 'emb')
6449: || ($embstyle eq 'wrp')) {
6450: $thisfn='/adm/wrapper'.$thisfn;
6451: } elsif ($embstyle eq 'unk'
6452: && $thisfn!~/\.(sequence|page)$/) {
6453: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
6454: } else {
6455: # &logthis("Got a blank emb style");
6456: }
6457: }
6458: }
6459: return $thisfn;
6460: }
6461:
6462: sub freeze_escape {
6463: my ($value)=@_;
6464: if (ref($value)) {
6465: $value=&nfreeze($value);
6466: return '__FROZEN__'.&escape($value);
6467: }
6468: return &escape($value);
6469: }
6470:
6471: # -------------------------------------------------------- Escape Special Chars
6472:
6473: sub escape {
6474: my $str=shift;
6475: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
6476: return $str;
6477: }
6478:
6479: # ----------------------------------------------------- Un-Escape Special Chars
6480:
6481: sub unescape {
6482: my $str=shift;
6483: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
6484: return $str;
6485: }
6486:
6487: sub thaw_unescape {
6488: my ($value)=@_;
6489: if ($value =~ /^__FROZEN__/) {
6490: substr($value,0,10,undef);
6491: $value=&unescape($value);
6492: return &thaw($value);
6493: }
6494: return &unescape($value);
6495: }
6496:
6497: sub correct_line_ends {
6498: my ($result)=@_;
6499: $$result =~s/\r\n/\n/mg;
6500: $$result =~s/\r/\n/mg;
6501: }
6502: # ================================================================ Main Program
6503:
6504: sub goodbye {
6505: &logthis("Starting Shut down");
6506: #not converted to using infrastruture and probably shouldn't be
6507: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
6508: #converted
6509: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
6510: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
6511: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
6512: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
6513: #1.1 only
6514: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
6515: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
6516: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
6517: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
6518: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
6519: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
6520: &logthis(sprintf("%-20s is %s",'hits',$hits));
6521: &flushcourselogs();
6522: &logthis("Shutting down");
6523: return DONE;
6524: }
6525:
6526: BEGIN {
6527: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
6528: unless ($readit) {
6529: {
6530: # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
6531: open(my $config,"</etc/httpd/conf/loncapa.conf");
6532:
6533: while (my $configline=<$config>) {
6534: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
6535: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
6536: chomp($varvalue);
6537: $perlvar{$varname}=$varvalue;
6538: }
6539: }
6540: close($config);
6541: }
6542: {
6543: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
6544:
6545: while (my $configline=<$config>) {
6546: if ($configline =~ /^[^\#]*PerlSetVar/) {
6547: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
6548: chomp($varvalue);
6549: $perlvar{$varname}=$varvalue;
6550: }
6551: }
6552: close($config);
6553: }
6554:
6555: # ------------------------------------------------------------ Read domain file
6556: {
6557: %domaindescription = ();
6558: %domain_auth_def = ();
6559: %domain_auth_arg_def = ();
6560: my $fh;
6561: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
6562: while (<$fh>) {
6563: next if (/^(\#|\s*$)/);
6564: # next if /^\#/;
6565: chomp;
6566: my ($domain, $domain_description, $def_auth, $def_auth_arg,
6567: $def_lang, $city, $longi, $lati, $primary) = split(/:/,$_);
6568: $domain_auth_def{$domain}=$def_auth;
6569: $domain_auth_arg_def{$domain}=$def_auth_arg;
6570: $domaindescription{$domain}=$domain_description;
6571: $domain_lang_def{$domain}=$def_lang;
6572: $domain_city{$domain}=$city;
6573: $domain_longi{$domain}=$longi;
6574: $domain_lati{$domain}=$lati;
6575: $domain_primary{$domain}=$primary;
6576:
6577: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
6578: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
6579: }
6580: }
6581: close ($fh);
6582: }
6583:
6584:
6585: # ------------------------------------------------------------- Read hosts file
6586: {
6587: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
6588:
6589: while (my $configline=<$config>) {
6590: next if ($configline =~ /^(\#|\s*$)/);
6591: chomp($configline);
6592: my ($id,$domain,$role,$name)=split(/:/,$configline);
6593: $name=~s/\s//g;
6594: if ($id && $domain && $role && $name) {
6595: $hostname{$id}=$name;
6596: $hostdom{$id}=$domain;
6597: if ($role eq 'library') { $libserv{$id}=$name; }
6598: }
6599: }
6600: close($config);
6601: # FIXME: dev server don't want this, production servers _do_ want this
6602: #&get_iphost();
6603: }
6604:
6605: sub get_iphost {
6606: if (%iphost) { return %iphost; }
6607: my %name_to_ip;
6608: foreach my $id (keys(%hostname)) {
6609: my $name=$hostname{$id};
6610: my $ip;
6611: if (!exists($name_to_ip{$name})) {
6612: $ip = gethostbyname($name);
6613: if (!$ip || length($ip) ne 4) {
6614: &logthis("Skipping host $id name $name no IP found\n");
6615: next;
6616: }
6617: $ip=inet_ntoa($ip);
6618: $name_to_ip{$name} = $ip;
6619: } else {
6620: $ip = $name_to_ip{$name};
6621: }
6622: push(@{$iphost{$ip}},$id);
6623: }
6624: return %iphost;
6625: }
6626:
6627: # ------------------------------------------------------ Read spare server file
6628: {
6629: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
6630:
6631: while (my $configline=<$config>) {
6632: chomp($configline);
6633: if ($configline) {
6634: $spareid{$configline}=1;
6635: }
6636: }
6637: close($config);
6638: }
6639: # ------------------------------------------------------------ Read permissions
6640: {
6641: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
6642:
6643: while (my $configline=<$config>) {
6644: chomp($configline);
6645: if ($configline) {
6646: my ($role,$perm)=split(/ /,$configline);
6647: if ($perm ne '') { $pr{$role}=$perm; }
6648: }
6649: }
6650: close($config);
6651: }
6652:
6653: # -------------------------------------------- Read plain texts for permissions
6654: {
6655: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
6656:
6657: while (my $configline=<$config>) {
6658: chomp($configline);
6659: if ($configline) {
6660: my ($short,$plain)=split(/:/,$configline);
6661: if ($plain ne '') { $prp{$short}=$plain; }
6662: }
6663: }
6664: close($config);
6665: }
6666:
6667: # ---------------------------------------------------------- Read package table
6668: {
6669: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
6670:
6671: while (my $configline=<$config>) {
6672: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
6673: chomp($configline);
6674: my ($short,$plain)=split(/:/,$configline);
6675: my ($pack,$name)=split(/\&/,$short);
6676: if ($plain ne '') {
6677: $packagetab{$pack.'&'.$name.'&name'}=$name;
6678: $packagetab{$short}=$plain;
6679: }
6680: }
6681: close($config);
6682: }
6683:
6684: # ------------- set up temporary directory
6685: {
6686: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
6687:
6688: }
6689:
6690: $memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
6691:
6692: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
6693: $dumpcount=0;
6694:
6695: &logtouch();
6696: &logthis('<font color="yellow">INFO: Read configuration</font>');
6697: $readit=1;
6698: {
6699: use integer;
6700: my $test=(2**32)+1;
6701: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
6702: &logthis(" Detected 64bit platform ($_64bit)");
6703: }
6704: }
6705: }
6706:
6707: 1;
6708: __END__
6709:
6710: =pod
6711:
6712: =head1 NAME
6713:
6714: Apache::lonnet - Subroutines to ask questions about things in the network.
6715:
6716: =head1 SYNOPSIS
6717:
6718: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
6719:
6720: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
6721:
6722: Common parameters:
6723:
6724: =over 4
6725:
6726: =item *
6727:
6728: $uname : an internal username (if $cname expecting a course Id specifically)
6729:
6730: =item *
6731:
6732: $udom : a domain (if $cdom expecting a course's domain specifically)
6733:
6734: =item *
6735:
6736: $symb : a resource instance identifier
6737:
6738: =item *
6739:
6740: $namespace : the name of a .db file that contains the data needed or
6741: being set.
6742:
6743: =back
6744:
6745: =head1 OVERVIEW
6746:
6747: lonnet provides subroutines which interact with the
6748: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
6749: about classes, users, and resources.
6750:
6751: For many of these objects you can also use this to store data about
6752: them or modify them in various ways.
6753:
6754: =head2 Symbs
6755:
6756: To identify a specific instance of a resource, LON-CAPA uses symbols
6757: or "symbs"X<symb>. These identifiers are built from the URL of the
6758: map, the resource number of the resource in the map, and the URL of
6759: the resource itself. The latter is somewhat redundant, but might help
6760: if maps change.
6761:
6762: An example is
6763:
6764: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
6765:
6766: The respective map entry is
6767:
6768: <resource id="19" src="/res/msu/korte/tests/part12.problem"
6769: title="Problem 2">
6770: </resource>
6771:
6772: Symbs are used by the random number generator, as well as to store and
6773: restore data specific to a certain instance of for example a problem.
6774:
6775: =head2 Storing And Retrieving Data
6776:
6777: X<store()>X<cstore()>X<restore()>Three of the most important functions
6778: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
6779: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
6780: is is the non-critical message twin of cstore. These functions are for
6781: handlers to store a perl hash to a user's permanent data space in an
6782: easy manner, and to retrieve it again on another call. It is expected
6783: that a handler would use this once at the beginning to retrieve data,
6784: and then again once at the end to send only the new data back.
6785:
6786: The data is stored in the user's data directory on the user's
6787: homeserver under the ID of the course.
6788:
6789: The hash that is returned by restore will have all of the previous
6790: value for all of the elements of the hash.
6791:
6792: Example:
6793:
6794: #creating a hash
6795: my %hash;
6796: $hash{'foo'}='bar';
6797:
6798: #storing it
6799: &Apache::lonnet::cstore(\%hash);
6800:
6801: #changing a value
6802: $hash{'foo'}='notbar';
6803:
6804: #adding a new value
6805: $hash{'bar'}='foo';
6806: &Apache::lonnet::cstore(\%hash);
6807:
6808: #retrieving the hash
6809: my %history=&Apache::lonnet::restore();
6810:
6811: #print the hash
6812: foreach my $key (sort(keys(%history))) {
6813: print("\%history{$key} = $history{$key}");
6814: }
6815:
6816: Will print out:
6817:
6818: %history{1:foo} = bar
6819: %history{1:keys} = foo:timestamp
6820: %history{1:timestamp} = 990455579
6821: %history{2:bar} = foo
6822: %history{2:foo} = notbar
6823: %history{2:keys} = foo:bar:timestamp
6824: %history{2:timestamp} = 990455580
6825: %history{bar} = foo
6826: %history{foo} = notbar
6827: %history{timestamp} = 990455580
6828: %history{version} = 2
6829:
6830: Note that the special hash entries C<keys>, C<version> and
6831: C<timestamp> were added to the hash. C<version> will be equal to the
6832: total number of versions of the data that have been stored. The
6833: C<timestamp> attribute will be the UNIX time the hash was
6834: stored. C<keys> is available in every historical section to list which
6835: keys were added or changed at a specific historical revision of a
6836: hash.
6837:
6838: B<Warning>: do not store the hash that restore returns directly. This
6839: will cause a mess since it will restore the historical keys as if the
6840: were new keys. I.E. 1:foo will become 1:1:foo etc.
6841:
6842: Calling convention:
6843:
6844: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
6845: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
6846:
6847: For more detailed information, see lonnet specific documentation.
6848:
6849: =head1 RETURN MESSAGES
6850:
6851: =over 4
6852:
6853: =item * B<con_lost>: unable to contact remote host
6854:
6855: =item * B<con_delayed>: unable to contact remote host, message will be delivered
6856: when the connection is brought back up
6857:
6858: =item * B<con_failed>: unable to contact remote host and unable to save message
6859: for later delivery
6860:
6861: =item * B<error:>: an error a occured, a description of the error follows the :
6862:
6863: =item * B<no_such_host>: unable to fund a host associated with the user/domain
6864: that was requested
6865:
6866: =back
6867:
6868: =head1 PUBLIC SUBROUTINES
6869:
6870: =head2 Session Environment Functions
6871:
6872: =over 4
6873:
6874: =item *
6875: X<appenv()>
6876: B<appenv(%hash)>: the value of %hash is written to
6877: the user envirnoment file, and will be restored for each access this
6878: user makes during this session, also modifies the %env for the current
6879: process
6880:
6881: =item *
6882: X<delenv()>
6883: B<delenv($regexp)>: removes all items from the session
6884: environment file that matches the regular expression in $regexp. The
6885: values are also delted from the current processes %env.
6886:
6887: =back
6888:
6889: =head2 User Information
6890:
6891: =over 4
6892:
6893: =item *
6894: X<queryauthenticate()>
6895: B<queryauthenticate($uname,$udom)>: try to determine user's current
6896: authentication scheme
6897:
6898: =item *
6899: X<authenticate()>
6900: B<authenticate($uname,$upass,$udom)>: try to
6901: authenticate user from domain's lib servers (first use the current
6902: one). C<$upass> should be the users password.
6903:
6904: =item *
6905: X<homeserver()>
6906: B<homeserver($uname,$udom)>: find the server which has
6907: the user's directory and files (there must be only one), this caches
6908: the answer, and also caches if there is a borken connection.
6909:
6910: =item *
6911: X<idget()>
6912: B<idget($udom,@ids)>: find the usernames behind a list of IDs
6913: (IDs are a unique resource in a domain, there must be only 1 ID per
6914: username, and only 1 username per ID in a specific domain) (returns
6915: hash: id=>name,id=>name)
6916:
6917: =item *
6918: X<idrget()>
6919: B<idrget($udom,@unames)>: find the IDs behind a list of
6920: usernames (returns hash: name=>id,name=>id)
6921:
6922: =item *
6923: X<idput()>
6924: B<idput($udom,%ids)>: store away a list of names and associated IDs
6925:
6926: =item *
6927: X<rolesinit()>
6928: B<rolesinit($udom,$username,$authhost)>: get user privileges
6929:
6930: =item *
6931: X<getsection()>
6932: B<getsection($udom,$uname,$cname)>: finds the section of student in the
6933: course $cname, return section name/number or '' for "not in course"
6934: and '-1' for "no section"
6935:
6936: =item *
6937: X<userenvironment()>
6938: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
6939: passed in @what from the requested user's environment, returns a hash
6940:
6941: =back
6942:
6943: =head2 User Roles
6944:
6945: =over 4
6946:
6947: =item *
6948:
6949: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
6950: actions
6951: F: full access
6952: U,I,K: authentication modes (cxx only)
6953: '': forbidden
6954: 1: user needs to choose course
6955: 2: browse allowed
6956:
6957: =item *
6958:
6959: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
6960: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
6961: and course level
6962:
6963: =item *
6964:
6965: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
6966: explanation of a user role term
6967:
6968: =back
6969:
6970: =head2 User Modification
6971:
6972: =over 4
6973:
6974: =item *
6975:
6976: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
6977: user for the level given by URL. Optional start and end dates (leave empty
6978: string or zero for "no date")
6979:
6980: =item *
6981:
6982: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
6983: change a users, password, possible return values are: ok,
6984: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
6985: refused
6986:
6987: =item *
6988:
6989: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
6990:
6991: =item *
6992:
6993: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
6994: modify user
6995:
6996: =item *
6997:
6998: modifystudent
6999:
7000: modify a students enrollment and identification information.
7001: The course id is resolved based on the current users environment.
7002: This means the envoking user must be a course coordinator or otherwise
7003: associated with a course.
7004:
7005: This call is essentially a wrapper for lonnet::modifyuser and
7006: lonnet::modify_student_enrollment
7007:
7008: Inputs:
7009:
7010: =over 4
7011:
7012: =item B<$udom> Students loncapa domain
7013:
7014: =item B<$uname> Students loncapa login name
7015:
7016: =item B<$uid> Students id/student number
7017:
7018: =item B<$umode> Students authentication mode
7019:
7020: =item B<$upass> Students password
7021:
7022: =item B<$first> Students first name
7023:
7024: =item B<$middle> Students middle name
7025:
7026: =item B<$last> Students last name
7027:
7028: =item B<$gene> Students generation
7029:
7030: =item B<$usec> Students section in course
7031:
7032: =item B<$end> Unix time of the roles expiration
7033:
7034: =item B<$start> Unix time of the roles start date
7035:
7036: =item B<$forceid> If defined, allow $uid to be changed
7037:
7038: =item B<$desiredhome> server to use as home server for student
7039:
7040: =back
7041:
7042: =item *
7043:
7044: modify_student_enrollment
7045:
7046: Change a students enrollment status in a class. The environment variable
7047: 'role.request.course' must be defined for this function to proceed.
7048:
7049: Inputs:
7050:
7051: =over 4
7052:
7053: =item $udom, students domain
7054:
7055: =item $uname, students name
7056:
7057: =item $uid, students user id
7058:
7059: =item $first, students first name
7060:
7061: =item $middle
7062:
7063: =item $last
7064:
7065: =item $gene
7066:
7067: =item $usec
7068:
7069: =item $end
7070:
7071: =item $start
7072:
7073: =back
7074:
7075:
7076: =item *
7077:
7078: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
7079: custom role; give a custom role to a user for the level given by URL. Specify
7080: name and domain of role author, and role name
7081:
7082: =item *
7083:
7084: revokerole($udom,$uname,$url,$role) : revoke a role for url
7085:
7086: =item *
7087:
7088: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
7089:
7090: =back
7091:
7092: =head2 Course Infomation
7093:
7094: =over 4
7095:
7096: =item *
7097:
7098: coursedescription($courseid) : returns a hash of information about the
7099: specified course id, including all environment settings for the
7100: course, the description of the course will be in the hash under the
7101: key 'description'
7102:
7103: =item *
7104:
7105: resdata($name,$domain,$type,@which) : request for current parameter
7106: setting for a specific $type, where $type is either 'course' or 'user',
7107: @what should be a list of parameters to ask about. This routine caches
7108: answers for 5 minutes.
7109:
7110: =back
7111:
7112: =head2 Course Modification
7113:
7114: =over 4
7115:
7116: =item *
7117:
7118: writecoursepref($courseid,%prefs) : write preferences (environment
7119: database) for a course
7120:
7121: =item *
7122:
7123: createcourse($udom,$description,$url) : make/modify course
7124:
7125: =back
7126:
7127: =head2 Resource Subroutines
7128:
7129: =over 4
7130:
7131: =item *
7132:
7133: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
7134:
7135: =item *
7136:
7137: repcopy($filename) : subscribes to the requested file, and attempts to
7138: replicate from the owning library server, Might return
7139: 'unavailable', 'not_found', 'forbidden', 'ok', or
7140: 'bad_request', also attempts to grab the metadata for the
7141: resource. Expects the local filesystem pathname
7142: (/home/httpd/html/res/....)
7143:
7144: =back
7145:
7146: =head2 Resource Information
7147:
7148: =over 4
7149:
7150: =item *
7151:
7152: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
7153: a vairety of different possible values, $varname should be a request
7154: string, and the other parameters can be used to specify who and what
7155: one is asking about.
7156:
7157: Possible values for $varname are environment.lastname (or other item
7158: from the envirnment hash), user.name (or someother aspect about the
7159: user), resource.0.maxtries (or some other part and parameter of a
7160: resource)
7161:
7162: =item *
7163:
7164: directcondval($number) : get current value of a condition; reads from a state
7165: string
7166:
7167: =item *
7168:
7169: condval($condidx) : value of condition index based on state
7170:
7171: =item *
7172:
7173: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
7174: resource's metadata, $what should be either a specific key, or either
7175: 'keys' (to get a list of possible keys) or 'packages' to get a list of
7176: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
7177:
7178: this function automatically caches all requests
7179:
7180: =item *
7181:
7182: metadata_query($query,$custom,$customshow) : make a metadata query against the
7183: network of library servers; returns file handle of where SQL and regex results
7184: will be stored for query
7185:
7186: =item *
7187:
7188: symbread($filename) : return symbolic list entry (filename argument optional);
7189: returns the data handle
7190:
7191: =item *
7192:
7193: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
7194: a possible symb for the URL in $thisfn, and if is an encryypted
7195: resource that the user accessed using /enc/ returns a 1 on success, 0
7196: on failure, user must be in a course, as it assumes the existance of
7197: the course initial hash, and uses $env('request.course.id'}
7198:
7199:
7200: =item *
7201:
7202: symbclean($symb) : removes versions numbers from a symb, returns the
7203: cleaned symb
7204:
7205: =item *
7206:
7207: is_on_map($uri) : checks if the $uri is somewhere on the current
7208: course map, user must be in a course for it to work.
7209:
7210: =item *
7211:
7212: numval($salt) : return random seed value (addend for rndseed)
7213:
7214: =item *
7215:
7216: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
7217: a random seed, all arguments are optional, if they aren't sent it uses the
7218: environment to derive them. Note: if symb isn't sent and it can't get one
7219: from &symbread it will use the current time as its return value
7220:
7221: =item *
7222:
7223: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
7224: unfakeable, receipt
7225:
7226: =item *
7227:
7228: receipt() : API to ireceipt working off of env values; given out to users
7229:
7230: =item *
7231:
7232: countacc($url) : count the number of accesses to a given URL
7233:
7234: =item *
7235:
7236: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
7237:
7238: =item *
7239:
7240: checkin($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 $tcrsid)
7241:
7242: =item *
7243:
7244: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
7245:
7246: =item *
7247:
7248: devalidate($symb) : devalidate temporary spreadsheet calculations,
7249: forcing spreadsheet to reevaluate the resource scores next time.
7250:
7251: =back
7252:
7253: =head2 Storing/Retreiving Data
7254:
7255: =over 4
7256:
7257: =item *
7258:
7259: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
7260: for this url; hashref needs to be given and should be a \%hashname; the
7261: remaining args aren't required and if they aren't passed or are '' they will
7262: be derived from the env
7263:
7264: =item *
7265:
7266: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
7267: uses critical subroutine
7268:
7269: =item *
7270:
7271: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
7272: all args are optional
7273:
7274: =item *
7275:
7276: dumpstore($namespace,$udom,$uname,$regexp,$range) :
7277: dumps the complete (or key matching regexp) namespace into a hash
7278: ($udom, $uname, $regexp, $range are optional) for a namespace that is
7279: normally &store()ed into
7280:
7281: $range should be either an integer '100' (give me the first 100
7282: matching records)
7283: or be two integers sperated by a - with no spaces
7284: '30-50' (give me the 30th through the 50th matching
7285: records)
7286:
7287:
7288: =item *
7289:
7290: putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
7291: replaces a &store() version of data with a replacement set of data
7292: for a particular resource in a namespace passed in the $storehash hash
7293: reference
7294:
7295: =item *
7296:
7297: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
7298: works very similar to store/cstore, but all data is stored in a
7299: temporary location and can be reset using tmpreset, $storehash should
7300: be a hash reference, returns nothing on success
7301:
7302: =item *
7303:
7304: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
7305: similar to restore, but all data is stored in a temporary location and
7306: can be reset using tmpreset. Returns a hash of values on success,
7307: error string otherwise.
7308:
7309: =item *
7310:
7311: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
7312: deltes all keys for $symb form the temporary storage hash.
7313:
7314: =item *
7315:
7316: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7317: reference filled in from namesp ($udom and $uname are optional)
7318:
7319: =item *
7320:
7321: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
7322: namesp ($udom and $uname are optional)
7323:
7324: =item *
7325:
7326: dump($namespace,$udom,$uname,$regexp,$range) :
7327: dumps the complete (or key matching regexp) namespace into a hash
7328: ($udom, $uname, $regexp, $range are optional)
7329:
7330: $range should be either an integer '100' (give me the first 100
7331: matching records)
7332: or be two integers sperated by a - with no spaces
7333: '30-50' (give me the 30th through the 50th matching
7334: records)
7335: =item *
7336:
7337: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
7338: $store can be a scalar, an array reference, or if the amount to be
7339: incremented is > 1, a hash reference.
7340:
7341: ($udom and $uname are optional)
7342:
7343: =item *
7344:
7345: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
7346: ($udom and $uname are optional)
7347:
7348: =item *
7349:
7350: cput($namespace,$storehash,$udom,$uname) : critical put
7351: ($udom and $uname are optional)
7352:
7353: =item *
7354:
7355: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7356: reference filled in from namesp (encrypts the return communication)
7357: ($udom and $uname are optional)
7358:
7359: =item *
7360:
7361: log($udom,$name,$home,$message) : write to permanent log for user; use
7362: critical subroutine
7363:
7364: =back
7365:
7366: =head2 Network Status Functions
7367:
7368: =over 4
7369:
7370: =item *
7371:
7372: dirlist($uri) : return directory list based on URI
7373:
7374: =item *
7375:
7376: spareserver() : find server with least workload from spare.tab
7377:
7378: =back
7379:
7380: =head2 Apache Request
7381:
7382: =over 4
7383:
7384: =item *
7385:
7386: ssi($url,%hash) : server side include, does a complete request cycle on url to
7387: localhost, posts hash
7388:
7389: =back
7390:
7391: =head2 Data to String to Data
7392:
7393: =over 4
7394:
7395: =item *
7396:
7397: hash2str(%hash) : convert a hash into a string complete with escaping and '='
7398: and '&' separators, supports elements that are arrayrefs and hashrefs
7399:
7400: =item *
7401:
7402: hashref2str($hashref) : convert a hashref into a string complete with
7403: escaping and '=' and '&' separators, supports elements that are
7404: arrayrefs and hashrefs
7405:
7406: =item *
7407:
7408: arrayref2str($arrayref) : convert an arrayref into a string complete
7409: with escaping and '&' separators, supports elements that are arrayrefs
7410: and hashrefs
7411:
7412: =item *
7413:
7414: str2hash($string) : convert string to hash using unescaping and
7415: splitting on '=' and '&', supports elements that are arrayrefs and
7416: hashrefs
7417:
7418: =item *
7419:
7420: str2array($string) : convert string to hash using unescaping and
7421: splitting on '&', supports elements that are arrayrefs and hashrefs
7422:
7423: =back
7424:
7425: =head2 Logging Routines
7426:
7427: =over 4
7428:
7429: These routines allow one to make log messages in the lonnet.log and
7430: lonnet.perm logfiles.
7431:
7432: =item *
7433:
7434: logtouch() : make sure the logfile, lonnet.log, exists
7435:
7436: =item *
7437:
7438: logthis() : append message to the normal lonnet.log file, it gets
7439: preiodically rolled over and deleted.
7440:
7441: =item *
7442:
7443: logperm() : append a permanent message to lonnet.perm.log, this log
7444: file never gets deleted by any automated portion of the system, only
7445: messages of critical importance should go in here.
7446:
7447: =back
7448:
7449: =head2 General File Helper Routines
7450:
7451: =over 4
7452:
7453: =item *
7454:
7455: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
7456: (a) files in /uploaded
7457: (i) If a local copy of the file exists -
7458: compares modification date of local copy with last-modified date for
7459: definitive version stored on home server for course. If local copy is
7460: stale, requests a new version from the home server and stores it.
7461: If the original has been removed from the home server, then local copy
7462: is unlinked.
7463: (ii) If local copy does not exist -
7464: requests the file from the home server and stores it.
7465:
7466: If $caller is 'uploadrep':
7467: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
7468: for request for files originally uploaded via DOCS.
7469: - returns 'ok' if fresh local copy now available, -1 otherwise.
7470:
7471: Otherwise:
7472: This indicates a call from the content generation phase of the request.
7473: - returns the entire contents of the file or -1.
7474:
7475: (b) files in /res
7476: - returns the entire contents of a file or -1;
7477: it properly subscribes to and replicates the file if neccessary.
7478:
7479:
7480: =item *
7481:
7482: stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
7483: reference
7484:
7485: returns either a stat() list of data about the file or an empty list
7486: if the file doesn't exist or couldn't find out about it (connection
7487: problems or user unknown)
7488:
7489: =item *
7490:
7491: filelocation($dir,$file) : returns file system location of a file
7492: based on URI; meant to be "fairly clean" absolute reference, $dir is a
7493: directory that relative $file lookups are to looked in ($dir of /a/dir
7494: and a file of ../bob will become /a/bob)
7495:
7496: =item *
7497:
7498: hreflocation($dir,$file) : returns file system location or a URL; same as
7499: filelocation except for hrefs
7500:
7501: =item *
7502:
7503: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
7504:
7505: =back
7506:
7507: =head2 Usererfile file routines (/uploaded*)
7508:
7509: =over 4
7510:
7511: =item *
7512:
7513: userfileupload(): main rotine for putting a file in a user or course's
7514: filespace, arguments are,
7515:
7516: formname - required - this is the name of the element in $env where the
7517: filename, and the contents of the file to create/modifed exist
7518: the filename is in $env{'form.'.$formname.'.filename'} and the
7519: contents of the file is located in $env{'form.'.$formname}
7520: coursedoc - if true, store the file in the course of the active role
7521: of the current user
7522: subdir - required - subdirectory to put the file in under ../userfiles/
7523: if undefined, it will be placed in "unknown"
7524:
7525: (This routine calls clean_filename() to remove any dangerous
7526: characters from the filename, and then calls finuserfileupload() to
7527: complete the transaction)
7528:
7529: returns either the url of the uploaded file (/uploaded/....) if successful
7530: and /adm/notfound.html if unsuccessful
7531:
7532: =item *
7533:
7534: clean_filename(): routine for cleaing a filename up for storage in
7535: userfile space, argument is:
7536:
7537: filename - proposed filename
7538:
7539: returns: the new clean filename
7540:
7541: =item *
7542:
7543: finishuserfileupload(): routine that creaes and sends the file to
7544: userspace, probably shouldn't be called directly
7545:
7546: docuname: username or courseid of destination for the file
7547: docudom: domain of user/course of destination for the file
7548: formname: same as for userfileupload()
7549: fname: filename (inculding subdirectories) for the file
7550:
7551: returns either the url of the uploaded file (/uploaded/....) if successful
7552: and /adm/notfound.html if unsuccessful
7553:
7554: =item *
7555:
7556: renameuserfile(): renames an existing userfile to a new name
7557:
7558: Args:
7559: docuname: username or courseid of destination for the file
7560: docudom: domain of user/course of destination for the file
7561: old: current file name (including any subdirs under userfiles)
7562: new: desired file name (including any subdirs under userfiles)
7563:
7564: =item *
7565:
7566: mkdiruserfile(): creates a directory is a userfiles dir
7567:
7568: Args:
7569: docuname: username or courseid of destination for the file
7570: docudom: domain of user/course of destination for the file
7571: dir: dir to create (including any subdirs under userfiles)
7572:
7573: =item *
7574:
7575: removeuserfile(): removes a file that exists in userfiles
7576:
7577: Args:
7578: docuname: username or courseid of destination for the file
7579: docudom: domain of user/course of destination for the file
7580: fname: filname to delete (including any subdirs under userfiles)
7581:
7582: =item *
7583:
7584: removeuploadedurl(): convience function for removeuserfile()
7585:
7586: Args:
7587: url: a full /uploaded/... url to delete
7588:
7589: =back
7590:
7591: =head2 HTTP Helper Routines
7592:
7593: =over 4
7594:
7595: =item *
7596:
7597: escape() : unpack non-word characters into CGI-compatible hex codes
7598:
7599: =item *
7600:
7601: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
7602:
7603: =back
7604:
7605: =head1 PRIVATE SUBROUTINES
7606:
7607: =head2 Underlying communication routines (Shouldn't call)
7608:
7609: =over 4
7610:
7611: =item *
7612:
7613: subreply() : tries to pass a message to lonc, returns con_lost if incapable
7614:
7615: =item *
7616:
7617: reply() : uses subreply to send a message to remote machine, logs all failures
7618:
7619: =item *
7620:
7621: critical() : passes a critical message to another server; if cannot
7622: get through then place message in connection buffer directory and
7623: returns con_delayed, if incapable of saving message, returns
7624: con_failed
7625:
7626: =item *
7627:
7628: reconlonc() : tries to reconnect lonc client processes.
7629:
7630: =back
7631:
7632: =head2 Resource Access Logging
7633:
7634: =over 4
7635:
7636: =item *
7637:
7638: flushcourselogs() : flush (save) buffer logs and access logs
7639:
7640: =item *
7641:
7642: courselog($what) : save message for course in hash
7643:
7644: =item *
7645:
7646: courseacclog($what) : save message for course using &courselog(). Perform
7647: special processing for specific resource types (problems, exams, quizzes, etc).
7648:
7649: =item *
7650:
7651: goodbye() : flush course logs and log shutting down; it is called in srm.conf
7652: as a PerlChildExitHandler
7653:
7654: =back
7655:
7656: =head2 Other
7657:
7658: =over 4
7659:
7660: =item *
7661:
7662: symblist($mapname,%newhash) : update symbolic storage links
7663:
7664: =back
7665:
7666: =cut
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