1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.554 2004/10/26 17:20:09 www 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 %homecache %badServerCache %hostip %iphost %spareid %hostdom
39: %libserv %pr %prp %metacache %packagetab %titlecache %courseresversioncache %resversioncache
40: %courselogs %accesshash %userrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseresdatacache
42: %userresdatacache %getsectioncache %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir);
44:
45: use IO::Socket;
46: use GDBM_File;
47: use Apache::Constants qw(:common :http);
48: use HTML::LCParser;
49: use Fcntl qw(:flock);
50: use Apache::loncoursedata;
51: use Apache::lonlocal;
52: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw);
53: use Time::HiRes qw( gettimeofday tv_interval );
54: my $readit;
55: my $max_connection_retries = 10; # Or some such value.
56:
57: =pod
58:
59: =head1 Package Variables
60:
61: These are largely undocumented, so if you decipher one please note it here.
62:
63: =over 4
64:
65: =item $processmarker
66:
67: Contains the time this process was started and this servers host id.
68:
69: =item $dumpcount
70:
71: Counts the number of times a message log flush has been attempted (regardless
72: of success) by this process. Used as part of the filename when messages are
73: delayed.
74:
75: =back
76:
77: =cut
78:
79:
80: # --------------------------------------------------------------------- Logging
81:
82: sub logtouch {
83: my $execdir=$perlvar{'lonDaemons'};
84: unless (-e "$execdir/logs/lonnet.log") {
85: open(my $fh,">>$execdir/logs/lonnet.log");
86: close $fh;
87: }
88: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
89: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
90: }
91:
92: sub logthis {
93: my $message=shift;
94: my $execdir=$perlvar{'lonDaemons'};
95: my $now=time;
96: my $local=localtime($now);
97: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
98: print $fh "$local ($$): $message\n";
99: close($fh);
100: }
101: return 1;
102: }
103:
104: sub logperm {
105: my $message=shift;
106: my $execdir=$perlvar{'lonDaemons'};
107: my $now=time;
108: my $local=localtime($now);
109: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
110: print $fh "$now:$message:$local\n";
111: close($fh);
112: }
113: return 1;
114: }
115:
116: # -------------------------------------------------- Non-critical communication
117: sub subreply {
118: my ($cmd,$server)=@_;
119: my $peerfile="$perlvar{'lonSockDir'}/$server";
120: #
121: # With loncnew process trimming, there's a timing hole between lonc server
122: # process exit and the master server picking up the listen on the AF_UNIX
123: # socket. In that time interval, a lock file will exist:
124:
125: my $lockfile=$peerfile.".lock";
126: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
127: sleep(1);
128: }
129: # At this point, either a loncnew parent is listening or an old lonc
130: # or loncnew child is listening so we can connect or everything's dead.
131: #
132: # We'll give the connection a few tries before abandoning it. If
133: # connection is not possible, we'll con_lost back to the client.
134: #
135: my $client;
136: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
137: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
138: Type => SOCK_STREAM,
139: Timeout => 10);
140: if($client) {
141: last; # Connected!
142: }
143: sleep(1); # Try again later if failed connection.
144: }
145: my $answer;
146: if ($client) {
147: print $client "$cmd\n";
148: $answer=<$client>;
149: if (!$answer) { $answer="con_lost"; }
150: chomp($answer);
151: } else {
152: $answer = 'con_lost'; # Failed connection.
153: }
154: return $answer;
155: }
156:
157: sub reply {
158: my ($cmd,$server)=@_;
159: unless (defined($hostname{$server})) { return 'no_such_host'; }
160: my $answer=subreply($cmd,$server);
161: if ($answer eq 'con_lost') {
162: #sleep 5;
163: #$answer=subreply($cmd,$server);
164: #if ($answer eq 'con_lost') {
165: # &logthis("Second attempt con_lost on $server");
166: # my $peerfile="$perlvar{'lonSockDir'}/$server";
167: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
168: # Type => SOCK_STREAM,
169: # Timeout => 10)
170: # or return "con_lost";
171: # &logthis("Killing socket");
172: # print $client "close_connection_exit\n";
173: #sleep 5;
174: # $answer=subreply($cmd,$server);
175: #}
176: }
177: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
178: &logthis("<font color=blue>WARNING:".
179: " $cmd to $server returned $answer</font>");
180: }
181: return $answer;
182: }
183:
184: # ----------------------------------------------------------- Send USR1 to lonc
185:
186: sub reconlonc {
187: my $peerfile=shift;
188: &logthis("Trying to reconnect for $peerfile");
189: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
190: if (open(my $fh,"<$loncfile")) {
191: my $loncpid=<$fh>;
192: chomp($loncpid);
193: if (kill 0 => $loncpid) {
194: &logthis("lonc at pid $loncpid responding, sending USR1");
195: kill USR1 => $loncpid;
196: sleep 1;
197: if (-e "$peerfile") { return; }
198: &logthis("$peerfile still not there, give it another try");
199: sleep 5;
200: if (-e "$peerfile") { return; }
201: &logthis(
202: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
203: } else {
204: &logthis(
205: "<font color=blue>WARNING:".
206: " lonc at pid $loncpid not responding, giving up</font>");
207: }
208: } else {
209: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
210: }
211: }
212:
213: # ------------------------------------------------------ Critical communication
214:
215: sub critical {
216: my ($cmd,$server)=@_;
217: unless ($hostname{$server}) {
218: &logthis("<font color=blue>WARNING:".
219: " Critical message to unknown server ($server)</font>");
220: return 'no_such_host';
221: }
222: my $answer=reply($cmd,$server);
223: if ($answer eq 'con_lost') {
224: my $pingreply=reply('ping',$server);
225: &reconlonc("$perlvar{'lonSockDir'}/$server");
226: my $pongreply=reply('pong',$server);
227: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
228: $answer=reply($cmd,$server);
229: if ($answer eq 'con_lost') {
230: my $now=time;
231: my $middlename=$cmd;
232: $middlename=substr($middlename,0,16);
233: $middlename=~s/\W//g;
234: my $dfilename=
235: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
236: $dumpcount++;
237: {
238: my $dfh;
239: if (open($dfh,">$dfilename")) {
240: print $dfh "$cmd\n";
241: close($dfh);
242: }
243: }
244: sleep 2;
245: my $wcmd='';
246: {
247: my $dfh;
248: if (open($dfh,"<$dfilename")) {
249: $wcmd=<$dfh>;
250: close($dfh);
251: }
252: }
253: chomp($wcmd);
254: if ($wcmd eq $cmd) {
255: &logthis("<font color=blue>WARNING: ".
256: "Connection buffer $dfilename: $cmd</font>");
257: &logperm("D:$server:$cmd");
258: return 'con_delayed';
259: } else {
260: &logthis("<font color=red>CRITICAL:"
261: ." Critical connection failed: $server $cmd</font>");
262: &logperm("F:$server:$cmd");
263: return 'con_failed';
264: }
265: }
266: }
267: return $answer;
268: }
269:
270: #
271: # -------------- Remove all key from the env that start witha lowercase letter
272: # (Which is always a lon-capa value)
273:
274: sub cleanenv {
275: # unless (defined(&Apache::exists_config_define("MODPERL2"))) { return; }
276: # unless (&Apache::exists_config_define("MODPERL2")) { return; }
277: foreach my $key (keys(%ENV)) {
278: if ($key =~ /^[a-z]/) {
279: delete($ENV{$key});
280: }
281: }
282: }
283:
284: # ------------------------------------------- Transfer profile into environment
285:
286: sub transfer_profile_to_env {
287: my ($lonidsdir,$handle)=@_;
288: my @profile;
289: {
290: open(my $idf,"$lonidsdir/$handle.id");
291: flock($idf,LOCK_SH);
292: @profile=<$idf>;
293: close($idf);
294: }
295: my $envi;
296: my %Remove;
297: for ($envi=0;$envi<=$#profile;$envi++) {
298: chomp($profile[$envi]);
299: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
300: $ENV{$envname} = $envvalue;
301: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
302: if ($time < time-300) {
303: $Remove{$key}++;
304: }
305: }
306: }
307: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
308: foreach my $expired_key (keys(%Remove)) {
309: &delenv($expired_key);
310: }
311: }
312:
313: # ---------------------------------------------------------- Append Environment
314:
315: sub appenv {
316: my %newenv=@_;
317: foreach (keys %newenv) {
318: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
319: &logthis("<font color=blue>WARNING: ".
320: "Attempt to modify environment ".$_." to ".$newenv{$_}
321: .'</font>');
322: delete($newenv{$_});
323: } else {
324: $ENV{$_}=$newenv{$_};
325: }
326: }
327:
328: my $lockfh;
329: unless (open($lockfh,"$ENV{'user.environment'}")) {
330: return 'error: '.$!;
331: }
332: unless (flock($lockfh,LOCK_EX)) {
333: &logthis("<font color=blue>WARNING: ".
334: 'Could not obtain exclusive lock in appenv: '.$!);
335: close($lockfh);
336: return 'error: '.$!;
337: }
338:
339: my @oldenv;
340: {
341: my $fh;
342: unless (open($fh,"$ENV{'user.environment'}")) {
343: return 'error: '.$!;
344: }
345: @oldenv=<$fh>;
346: close($fh);
347: }
348: for (my $i=0; $i<=$#oldenv; $i++) {
349: chomp($oldenv[$i]);
350: if ($oldenv[$i] ne '') {
351: my ($name,$value)=split(/=/,$oldenv[$i]);
352: unless (defined($newenv{$name})) {
353: $newenv{$name}=$value;
354: }
355: }
356: }
357: {
358: my $fh;
359: unless (open($fh,">$ENV{'user.environment'}")) {
360: return 'error';
361: }
362: my $newname;
363: foreach $newname (keys %newenv) {
364: print $fh "$newname=$newenv{$newname}\n";
365: }
366: close($fh);
367: }
368:
369: close($lockfh);
370: return 'ok';
371: }
372: # ----------------------------------------------------- Delete from Environment
373:
374: sub delenv {
375: my $delthis=shift;
376: my %newenv=();
377: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
378: &logthis("<font color=blue>WARNING: ".
379: "Attempt to delete from environment ".$delthis);
380: return 'error';
381: }
382: my @oldenv;
383: {
384: my $fh;
385: unless (open($fh,"$ENV{'user.environment'}")) {
386: return 'error';
387: }
388: unless (flock($fh,LOCK_SH)) {
389: &logthis("<font color=blue>WARNING: ".
390: 'Could not obtain shared lock in delenv: '.$!);
391: close($fh);
392: return 'error: '.$!;
393: }
394: @oldenv=<$fh>;
395: close($fh);
396: }
397: {
398: my $fh;
399: unless (open($fh,">$ENV{'user.environment'}")) {
400: return 'error';
401: }
402: unless (flock($fh,LOCK_EX)) {
403: &logthis("<font color=blue>WARNING: ".
404: 'Could not obtain exclusive lock in delenv: '.$!);
405: close($fh);
406: return 'error: '.$!;
407: }
408: foreach (@oldenv) {
409: if ($_=~/^$delthis/) {
410: my ($key,undef) = split('=',$_);
411: delete($ENV{$key});
412: } else {
413: print $fh $_;
414: }
415: }
416: close($fh);
417: }
418: return 'ok';
419: }
420:
421: # ------------------------------------------ Find out current server userload
422: # there is a copy in lond
423: sub userload {
424: my $numusers=0;
425: {
426: opendir(LONIDS,$perlvar{'lonIDsDir'});
427: my $filename;
428: my $curtime=time;
429: while ($filename=readdir(LONIDS)) {
430: if ($filename eq '.' || $filename eq '..') {next;}
431: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
432: if ($curtime-$mtime < 1800) { $numusers++; }
433: }
434: closedir(LONIDS);
435: }
436: my $userloadpercent=0;
437: my $maxuserload=$perlvar{'lonUserLoadLim'};
438: if ($maxuserload) {
439: $userloadpercent=100*$numusers/$maxuserload;
440: }
441: $userloadpercent=sprintf("%.2f",$userloadpercent);
442: return $userloadpercent;
443: }
444:
445: # ------------------------------------------ Fight off request when overloaded
446:
447: sub overloaderror {
448: my ($r,$checkserver)=@_;
449: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
450: my $loadavg;
451: if ($checkserver eq $perlvar{'lonHostID'}) {
452: open(my $loadfile,'/proc/loadavg');
453: $loadavg=<$loadfile>;
454: $loadavg =~ s/\s.*//g;
455: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
456: close($loadfile);
457: } else {
458: $loadavg=&reply('load',$checkserver);
459: }
460: my $overload=$loadavg-100;
461: if ($overload>0) {
462: $r->err_headers_out->{'Retry-After'}=$overload;
463: $r->log_error('Overload of '.$overload.' on '.$checkserver);
464: return 413;
465: }
466: return '';
467: }
468:
469: # ------------------------------ Find server with least workload from spare.tab
470:
471: sub spareserver {
472: my ($loadpercent,$userloadpercent) = @_;
473: my $tryserver;
474: my $spareserver='';
475: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
476: my $lowestserver=$loadpercent > $userloadpercent?
477: $loadpercent : $userloadpercent;
478: foreach $tryserver (keys %spareid) {
479: my $loadans=reply('load',$tryserver);
480: my $userloadans=reply('userload',$tryserver);
481: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
482: next; #didn't get a number from the server
483: }
484: my $answer;
485: if ($loadans =~ /\d/) {
486: if ($userloadans =~ /\d/) {
487: #both are numbers, pick the bigger one
488: $answer=$loadans > $userloadans?
489: $loadans : $userloadans;
490: } else {
491: $answer = $loadans;
492: }
493: } else {
494: $answer = $userloadans;
495: }
496: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
497: $spareserver="http://$hostname{$tryserver}";
498: $lowestserver=$answer;
499: }
500: }
501: return $spareserver;
502: }
503:
504: # --------------------------------------------- Try to change a user's password
505:
506: sub changepass {
507: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
508: $currentpass = &escape($currentpass);
509: $newpass = &escape($newpass);
510: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
511: $server);
512: if (! $answer) {
513: &logthis("No reply on password change request to $server ".
514: "by $uname in domain $udom.");
515: } elsif ($answer =~ "^ok") {
516: &logthis("$uname in $udom successfully changed their password ".
517: "on $server.");
518: } elsif ($answer =~ "^pwchange_failure") {
519: &logthis("$uname in $udom was unable to change their password ".
520: "on $server. The action was blocked by either lcpasswd ".
521: "or pwchange");
522: } elsif ($answer =~ "^non_authorized") {
523: &logthis("$uname in $udom did not get their password correct when ".
524: "attempting to change it on $server.");
525: } elsif ($answer =~ "^auth_mode_error") {
526: &logthis("$uname in $udom attempted to change their password despite ".
527: "not being locally or internally authenticated on $server.");
528: } elsif ($answer =~ "^unknown_user") {
529: &logthis("$uname in $udom attempted to change their password ".
530: "on $server but were unable to because $server is not ".
531: "their home server.");
532: } elsif ($answer =~ "^refused") {
533: &logthis("$server refused to change $uname in $udom password because ".
534: "it was sent an unencrypted request to change the password.");
535: }
536: return $answer;
537: }
538:
539: # ----------------------- Try to determine user's current authentication scheme
540:
541: sub queryauthenticate {
542: my ($uname,$udom)=@_;
543: my $uhome=&homeserver($uname,$udom);
544: if (!$uhome) {
545: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
546: return 'no_host';
547: }
548: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
549: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
550: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
551: }
552: return $answer;
553: }
554:
555: # --------- Try to authenticate user from domain's lib servers (first this one)
556:
557: sub authenticate {
558: my ($uname,$upass,$udom)=@_;
559: $upass=escape($upass);
560: $uname=~s/\W//g;
561: my $uhome=&homeserver($uname,$udom);
562: if (!$uhome) {
563: &logthis("User $uname at $udom is unknown in authenticate");
564: return 'no_host';
565: }
566: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
567: if ($answer eq 'authorized') {
568: &logthis("User $uname at $udom authorized by $uhome");
569: return $uhome;
570: }
571: if ($answer eq 'non_authorized') {
572: &logthis("User $uname at $udom rejected by $uhome");
573: return 'no_host';
574: }
575: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
576: return 'no_host';
577: }
578:
579: # ---------------------- Find the homebase for a user from domain's lib servers
580:
581: sub homeserver {
582: my ($uname,$udom,$ignoreBadCache)=@_;
583: my $index="$uname:$udom";
584:
585: my ($result,$cached)=&is_cached(\%homecache,$index,'home',86400);
586: if (defined($cached)) { return $result; }
587: my $tryserver;
588: foreach $tryserver (keys %libserv) {
589: next if ($ignoreBadCache ne 'true' &&
590: exists($badServerCache{$tryserver}));
591: if ($hostdom{$tryserver} eq $udom) {
592: my $answer=reply("home:$udom:$uname",$tryserver);
593: if ($answer eq 'found') {
594: return &do_cache(\%homecache,$index,$tryserver,'home');
595: } elsif ($answer eq 'no_host') {
596: $badServerCache{$tryserver}=1;
597: }
598: }
599: }
600: return 'no_host';
601: }
602:
603: # ------------------------------------- Find the usernames behind a list of IDs
604:
605: sub idget {
606: my ($udom,@ids)=@_;
607: my %returnhash=();
608:
609: my $tryserver;
610: foreach $tryserver (keys %libserv) {
611: if ($hostdom{$tryserver} eq $udom) {
612: my $idlist=join('&',@ids);
613: $idlist=~tr/A-Z/a-z/;
614: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
615: my @answer=();
616: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
617: @answer=split(/\&/,$reply);
618: } ;
619: my $i;
620: for ($i=0;$i<=$#ids;$i++) {
621: if ($answer[$i]) {
622: $returnhash{$ids[$i]}=$answer[$i];
623: }
624: }
625: }
626: }
627: return %returnhash;
628: }
629:
630: # ------------------------------------- Find the IDs behind a list of usernames
631:
632: sub idrget {
633: my ($udom,@unames)=@_;
634: my %returnhash=();
635: foreach (@unames) {
636: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
637: }
638: return %returnhash;
639: }
640:
641: # ------------------------------- Store away a list of names and associated IDs
642:
643: sub idput {
644: my ($udom,%ids)=@_;
645: my %servers=();
646: foreach (keys %ids) {
647: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
648: my $uhom=&homeserver($_,$udom);
649: if ($uhom ne 'no_host') {
650: my $id=&escape($ids{$_});
651: $id=~tr/A-Z/a-z/;
652: my $unam=&escape($_);
653: if ($servers{$uhom}) {
654: $servers{$uhom}.='&'.$id.'='.$unam;
655: } else {
656: $servers{$uhom}=$id.'='.$unam;
657: }
658: }
659: }
660: foreach (keys %servers) {
661: &critical('idput:'.$udom.':'.$servers{$_},$_);
662: }
663: }
664:
665: # --------------------------------------------------- Assign a key to a student
666:
667: sub assign_access_key {
668: #
669: # a valid key looks like uname:udom#comments
670: # comments are being appended
671: #
672: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
673: $kdom=
674: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($kdom));
675: $knum=
676: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($knum));
677: $cdom=
678: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
679: $cnum=
680: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
681: $udom=$ENV{'user.name'} unless (defined($udom));
682: $uname=$ENV{'user.domain'} unless (defined($uname));
683: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
684: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
685: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
686: # assigned to this person
687: # - this should not happen,
688: # unless something went wrong
689: # the first time around
690: # ready to assign
691: $logentry=$1.'; '.$logentry;
692: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
693: $kdom,$knum) eq 'ok') {
694: # key now belongs to user
695: my $envkey='key.'.$cdom.'_'.$cnum;
696: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
697: &appenv('environment.'.$envkey => $ckey);
698: return 'ok';
699: } else {
700: return
701: 'error: Count not permanently assign key, will need to be re-entered later.';
702: }
703: } else {
704: return 'error: Could not assign key, try again later.';
705: }
706: } elsif (!$existing{$ckey}) {
707: # the key does not exist
708: return 'error: The key does not exist';
709: } else {
710: # the key is somebody else's
711: return 'error: The key is already in use';
712: }
713: }
714:
715: # ------------------------------------------ put an additional comment on a key
716:
717: sub comment_access_key {
718: #
719: # a valid key looks like uname:udom#comments
720: # comments are being appended
721: #
722: my ($ckey,$cdom,$cnum,$logentry)=@_;
723: $cdom=
724: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
725: $cnum=
726: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
727: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
728: if ($existing{$ckey}) {
729: $existing{$ckey}.='; '.$logentry;
730: # ready to assign
731: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
732: $cdom,$cnum) eq 'ok') {
733: return 'ok';
734: } else {
735: return 'error: Count not store comment.';
736: }
737: } else {
738: # the key does not exist
739: return 'error: The key does not exist';
740: }
741: }
742:
743: # ------------------------------------------------------ Generate a set of keys
744:
745: sub generate_access_keys {
746: my ($number,$cdom,$cnum,$logentry)=@_;
747: $cdom=
748: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
749: $cnum=
750: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
751: unless (&allowed('mky',$cdom)) { return 0; }
752: unless (($cdom) && ($cnum)) { return 0; }
753: if ($number>10000) { return 0; }
754: sleep(2); # make sure don't get same seed twice
755: srand(time()^($$+($$<<15))); # from "Programming Perl"
756: my $total=0;
757: for (my $i=1;$i<=$number;$i++) {
758: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
759: sprintf("%lx",int(100000*rand)).'-'.
760: sprintf("%lx",int(100000*rand));
761: $newkey=~s/1/g/g; # folks mix up 1 and l
762: $newkey=~s/0/h/g; # and also 0 and O
763: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
764: if ($existing{$newkey}) {
765: $i--;
766: } else {
767: if (&put('accesskeys',
768: { $newkey => '# generated '.localtime().
769: ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
770: '; '.$logentry },
771: $cdom,$cnum) eq 'ok') {
772: $total++;
773: }
774: }
775: }
776: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
777: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
778: return $total;
779: }
780:
781: # ------------------------------------------------------- Validate an accesskey
782:
783: sub validate_access_key {
784: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
785: $cdom=
786: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
787: $cnum=
788: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
789: $udom=$ENV{'user.domain'} unless (defined($udom));
790: $uname=$ENV{'user.name'} unless (defined($uname));
791: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
792: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
793: }
794:
795: # ------------------------------------- Find the section of student in a course
796:
797: sub getsection {
798: my ($udom,$unam,$courseid)=@_;
799: $courseid=~s/\_/\//g;
800: $courseid=~s/^(\w)/\/$1/;
801:
802: my $hashid="$udom:$unam:$courseid";
803: my ($result,$cached)=&is_cached(\%getsectioncache,$hashid,'getsection');
804: if (defined($cached)) { return $result; }
805:
806: my %Pending;
807: my %Expired;
808: #
809: # Each role can either have not started yet (pending), be active,
810: # or have expired.
811: #
812: # If there is an active role, we are done.
813: #
814: # If there is more than one role which has not started yet,
815: # choose the one which will start sooner
816: # If there is one role which has not started yet, return it.
817: #
818: # If there is more than one expired role, choose the one which ended last.
819: # If there is a role which has expired, return it.
820: #
821: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
822: &homeserver($unam,$udom)))) {
823: my ($key,$value)=split(/\=/,$_);
824: $key=&unescape($key);
825: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
826: my $section=$1;
827: if ($key eq $courseid.'_st') { $section=''; }
828: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
829: my $now=time;
830: if (defined($end) && $end && ($now > $end)) {
831: $Expired{$end}=$section;
832: next;
833: }
834: if (defined($start) && $start && ($now < $start)) {
835: $Pending{$start}=$section;
836: next;
837: }
838: return &do_cache(\%getsectioncache,$hashid,$section,'getsection');
839: }
840: #
841: # Presumedly there will be few matching roles from the above
842: # loop and the sorting time will be negligible.
843: if (scalar(keys(%Pending))) {
844: my ($time) = sort {$a <=> $b} keys(%Pending);
845: return &do_cache(\%getsectioncache,$hashid,$Pending{$time},'getsection');
846: }
847: if (scalar(keys(%Expired))) {
848: my @sorted = sort {$a <=> $b} keys(%Expired);
849: my $time = pop(@sorted);
850: return &do_cache(\%getsectioncache,$hashid,$Expired{$time},'getsection');
851: }
852: return &do_cache(\%getsectioncache,$hashid,'-1','getsection');
853: }
854:
855:
856: my $disk_caching_disabled=1;
857:
858: sub devalidate_cache {
859: my ($cache,$id,$name) = @_;
860: delete $$cache{$id.'.time'};
861: delete $$cache{$id.'.file'};
862: delete $$cache{$id};
863: if (1 || $disk_caching_disabled) { return; }
864: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
865: if (!-e $filename) { return; }
866: open(DB,">$filename.lock");
867: flock(DB,LOCK_EX);
868: my %hash;
869: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
870: eval <<'EVALBLOCK';
871: delete($hash{$id});
872: delete($hash{$id.'.time'});
873: EVALBLOCK
874: if ($@) {
875: &logthis("<font color='red'>devalidate_cache blew up :$@:$name</font>");
876: unlink($filename);
877: }
878: } else {
879: if (-e $filename) {
880: &logthis("Unable to tie hash (devalidate cache): $name");
881: unlink($filename);
882: }
883: }
884: untie(%hash);
885: flock(DB,LOCK_UN);
886: close(DB);
887: }
888:
889: sub is_cached {
890: my ($cache,$id,$name,$time) = @_;
891: if (!$time) { $time=300; }
892: if (!exists($$cache{$id.'.time'})) {
893: &load_cache_item($cache,$name,$id,$time);
894: }
895: if (!exists($$cache{$id.'.time'})) {
896: # &logthis("Didn't find $id");
897: return (undef,undef);
898: } else {
899: if (time-($$cache{$id.'.time'})>$time) {
900: if (exists($$cache{$id.'.file'})) {
901: foreach my $filename (@{ $$cache{$id.'.file'} }) {
902: my $mtime=(stat($filename))[9];
903: #+1 is to take care of edge effects
904: if ($mtime && (($mtime+1) < ($$cache{$id.'.time'}))) {
905: # &logthis("Upping $mtime - ".$$cache{$id.'.time'}.
906: # "$id because of $filename");
907: } else {
908: &logthis("Devalidating $filename $id - ".(time-($$cache{$id.'.time'})));
909: &devalidate_cache($cache,$id,$name);
910: return (undef,undef);
911: }
912: }
913: $$cache{$id.'.time'}=time;
914: } else {
915: # &logthis("Devalidating $id - ".time-($$cache{$id.'.time'}));
916: &devalidate_cache($cache,$id,$name);
917: return (undef,undef);
918: }
919: }
920: }
921: return ($$cache{$id},1);
922: }
923:
924: sub do_cache {
925: my ($cache,$id,$value,$name) = @_;
926: $$cache{$id.'.time'}=time;
927: $$cache{$id}=$value;
928: # &logthis("Caching $id as :$value:");
929: &save_cache_item($cache,$name,$id);
930: # do_cache implictly return the set value
931: $$cache{$id};
932: }
933:
934: my %do_save_item;
935: my %do_save;
936: sub save_cache_item {
937: my ($cache,$name,$id)=@_;
938: if ($disk_caching_disabled) { return; }
939: $do_save{$name}=$cache;
940: if (!exists($do_save_item{$name})) { $do_save_item{$name}={} }
941: $do_save_item{$name}->{$id}=1;
942: return;
943: }
944:
945: sub save_cache {
946: if ($disk_caching_disabled) { return; }
947: my ($cache,$name,$id);
948: foreach $name (keys(%do_save)) {
949: $cache=$do_save{$name};
950:
951: my $starttime=&Time::HiRes::time();
952: &logthis("Saving :$name:");
953: my %hash;
954: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
955: open(DB,">$filename.lock");
956: flock(DB,LOCK_EX);
957: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
958: foreach $id (keys(%{ $do_save_item{$name} })) {
959: eval <<'EVALBLOCK';
960: $hash{$id.'.time'}=$$cache{$id.'.time'};
961: $hash{$id}=freeze({'item'=>$$cache{$id}});
962: if (exists($$cache{$id.'.file'})) {
963: $hash{$id.'.file'}=freeze({'item'=>$$cache{$id.'.file'}});
964: }
965: EVALBLOCK
966: if ($@) {
967: &logthis("<font color='red'>save_cache blew up :$@:$name</font>");
968: unlink($filename);
969: last;
970: }
971: }
972: } else {
973: if (-e $filename) {
974: &logthis("Unable to tie hash (save cache): $name ($!)");
975: unlink($filename);
976: }
977: }
978: untie(%hash);
979: flock(DB,LOCK_UN);
980: close(DB);
981: &logthis("save_cache $name took ".(&Time::HiRes::time()-$starttime));
982: }
983: undef(%do_save);
984: undef(%do_save_item);
985:
986: }
987:
988: sub load_cache_item {
989: my ($cache,$name,$id,$time)=@_;
990: if ($disk_caching_disabled) { return; }
991: my $starttime=&Time::HiRes::time();
992: # &logthis("Before Loading $name for $id size is ".scalar(%$cache));
993: my %hash;
994: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
995: if (!-e $filename) { return; }
996: open(DB,">$filename.lock");
997: flock(DB,LOCK_SH);
998: if (tie(%hash,'GDBM_File',$filename,&GDBM_READER(),0640)) {
999: eval <<'EVALBLOCK';
1000: if (!%$cache) {
1001: my $count;
1002: while (my ($key,$value)=each(%hash)) {
1003: $count++;
1004: if ($key =~ /\.time$/) {
1005: $$cache{$key}=$value;
1006: } else {
1007: my $hashref=thaw($value);
1008: $$cache{$key}=$hashref->{'item'};
1009: }
1010: }
1011: # &logthis("Initial load: $count");
1012: } else {
1013: if (($$cache{$id.'.time'}+$time) < time) {
1014: $$cache{$id.'.time'}=$hash{$id.'.time'};
1015: {
1016: my $hashref=thaw($hash{$id});
1017: $$cache{$id}=$hashref->{'item'};
1018: }
1019: if (exists($hash{$id.'.file'})) {
1020: my $hashref=thaw($hash{$id.'.file'});
1021: $$cache{$id.'.file'}=$hashref->{'item'};
1022: }
1023: }
1024: }
1025: EVALBLOCK
1026: if ($@) {
1027: &logthis("<font color='red'>load_cache blew up :$@:$name</font>");
1028: unlink($filename);
1029: }
1030: } else {
1031: if (-e $filename) {
1032: &logthis("Unable to tie hash (load cache item): $name ($!)");
1033: unlink($filename);
1034: }
1035: }
1036: untie(%hash);
1037: flock(DB,LOCK_UN);
1038: close(DB);
1039: # &logthis("After Loading $name size is ".scalar(%$cache));
1040: # &logthis("load_cache_item $name took ".(&Time::HiRes::time()-$starttime));
1041: }
1042:
1043: # ------------------------------------- Read an entry from a user's environment
1044:
1045: sub userenvironment {
1046: my ($udom,$unam,@what)=@_;
1047: my %returnhash=();
1048: my @answer=split(/\&/,
1049: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1050: &homeserver($unam,$udom)));
1051: my $i;
1052: for ($i=0;$i<=$#what;$i++) {
1053: $returnhash{$what[$i]}=&unescape($answer[$i]);
1054: }
1055: return %returnhash;
1056: }
1057:
1058: # -------------------------------------------------------------------- New chat
1059:
1060: sub chatsend {
1061: my ($newentry,$anon)=@_;
1062: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1063: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1064: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1065: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1066: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
1067: &escape($newentry)),$chome);
1068: }
1069:
1070: # ------------------------------------------ Find current version of a resource
1071:
1072: sub getversion {
1073: my $fname=&clutter(shift);
1074: unless ($fname=~/^\/res\//) { return -1; }
1075: return ¤tversion(&filelocation('',$fname));
1076: }
1077:
1078: sub currentversion {
1079: my $fname=shift;
1080: my ($result,$cached)=&is_cached(\%resversioncache,$fname,'resversion',600);
1081: if (defined($cached)) { return $result; }
1082: my $author=$fname;
1083: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1084: my ($udom,$uname)=split(/\//,$author);
1085: my $home=homeserver($uname,$udom);
1086: if ($home eq 'no_host') {
1087: return -1;
1088: }
1089: my $answer=reply("currentversion:$fname",$home);
1090: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1091: return -1;
1092: }
1093: return &do_cache(\%resversioncache,$fname,$answer,'resversion');
1094: }
1095:
1096: # ----------------------------- Subscribe to a resource, return URL if possible
1097:
1098: sub subscribe {
1099: my $fname=shift;
1100: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1101: $fname=~s/[\n\r]//g;
1102: my $author=$fname;
1103: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1104: my ($udom,$uname)=split(/\//,$author);
1105: my $home=homeserver($uname,$udom);
1106: if ($home eq 'no_host') {
1107: return 'not_found';
1108: }
1109: my $answer=reply("sub:$fname",$home);
1110: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1111: $answer.=' by '.$home;
1112: }
1113: return $answer;
1114: }
1115:
1116: # -------------------------------------------------------------- Replicate file
1117:
1118: sub repcopy {
1119: my $filename=shift;
1120: $filename=~s/\/+/\//g;
1121: if ($filename=~m|^/home/httpd/html/adm/|) { return OK; }
1122: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return OK; }
1123: if ($filename=~m|^/home/httpd/html/userfiles/| or
1124: $filename=~m|^/*uploaded/|) {
1125: return &repcopy_userfile($filename);
1126: }
1127: $filename=~s/[\n\r]//g;
1128: my $transname="$filename.in.transfer";
1129: if ((-e $filename) || (-e $transname)) { return OK; }
1130: my $remoteurl=subscribe($filename);
1131: if ($remoteurl =~ /^con_lost by/) {
1132: &logthis("Subscribe returned $remoteurl: $filename");
1133: return HTTP_SERVICE_UNAVAILABLE;
1134: } elsif ($remoteurl eq 'not_found') {
1135: #&logthis("Subscribe returned not_found: $filename");
1136: return HTTP_NOT_FOUND;
1137: } elsif ($remoteurl =~ /^rejected by/) {
1138: &logthis("Subscribe returned $remoteurl: $filename");
1139: return FORBIDDEN;
1140: } elsif ($remoteurl eq 'directory') {
1141: return OK;
1142: } else {
1143: my $author=$filename;
1144: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1145: my ($udom,$uname)=split(/\//,$author);
1146: my $home=homeserver($uname,$udom);
1147: unless ($home eq $perlvar{'lonHostID'}) {
1148: my @parts=split(/\//,$filename);
1149: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1150: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1151: &logthis("Malconfiguration for replication: $filename");
1152: return HTTP_BAD_REQUEST;
1153: }
1154: my $count;
1155: for ($count=5;$count<$#parts;$count++) {
1156: $path.="/$parts[$count]";
1157: if ((-e $path)!=1) {
1158: mkdir($path,0777);
1159: }
1160: }
1161: my $ua=new LWP::UserAgent;
1162: my $request=new HTTP::Request('GET',"$remoteurl");
1163: my $response=$ua->request($request,$transname);
1164: if ($response->is_error()) {
1165: unlink($transname);
1166: my $message=$response->status_line;
1167: &logthis("<font color=blue>WARNING:"
1168: ." LWP get: $message: $filename</font>");
1169: return HTTP_SERVICE_UNAVAILABLE;
1170: } else {
1171: if ($remoteurl!~/\.meta$/) {
1172: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1173: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1174: if ($mresponse->is_error()) {
1175: unlink($filename.'.meta');
1176: &logthis(
1177: "<font color=yellow>INFO: No metadata: $filename</font>");
1178: }
1179: }
1180: rename($transname,$filename);
1181: return OK;
1182: }
1183: }
1184: }
1185: }
1186:
1187: # ------------------------------------------------ Get server side include body
1188: sub ssi_body {
1189: my ($filelink,%form)=@_;
1190: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1191: &ssi($filelink,%form));
1192: $output=~
1193: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
1194: $output=~s/^.*?\<body[^\>]*\>//si;
1195: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1196: return $output;
1197: }
1198:
1199: # --------------------------------------------------------- Server Side Include
1200:
1201: sub ssi {
1202:
1203: my ($fn,%form)=@_;
1204:
1205: my $ua=new LWP::UserAgent;
1206:
1207: my $request;
1208:
1209: if (%form) {
1210: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1211: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1212: } else {
1213: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1214: }
1215:
1216: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1217: my $response=$ua->request($request);
1218:
1219: return $response->content;
1220: }
1221:
1222: sub externalssi {
1223: my ($url)=@_;
1224: my $ua=new LWP::UserAgent;
1225: my $request=new HTTP::Request('GET',$url);
1226: my $response=$ua->request($request);
1227: return $response->content;
1228: }
1229:
1230: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1231:
1232: sub allowuploaded {
1233: my ($srcurl,$url)=@_;
1234: $url=&clutter(&declutter($url));
1235: my $dir=$url;
1236: $dir=~s/\/[^\/]+$//;
1237: my %httpref=();
1238: my $httpurl=&hreflocation('',$url);
1239: $httpref{'httpref.'.$httpurl}=$srcurl;
1240: &Apache::lonnet::appenv(%httpref);
1241: }
1242:
1243: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1244: # input: action, courseID, current domain, home server for course, intended
1245: # path to file, source of file.
1246: # output: url to file (if action was uploaddoc),
1247: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1248: #
1249: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1250: # course.
1251: #
1252: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1253: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1254: # course's home server.
1255: #
1256: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1257: # be copied from $source (current location) to
1258: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1259: # and will then be copied to
1260: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1261: # course's home server.
1262: #
1263: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1264: # will be retrived from $ENV{form.uploaddoc} (from DOCS interface) to
1265: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1266: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1267: # in course's home server.
1268:
1269:
1270: sub process_coursefile {
1271: my ($action,$docuname,$docudom,$docuhome,$file,$source)=@_;
1272: my $fetchresult;
1273: if ($action eq 'propagate') {
1274: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file
1275: ,$docuhome);
1276: } else {
1277: my $fetchresult = '';
1278: my $fpath = '';
1279: my $fname = $file;
1280: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1281: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1282: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1283: unless ($fpath eq '') {
1284: my @parts=split('/',$fpath);
1285: foreach my $part (@parts) {
1286: $filepath.= '/'.$part;
1287: if ((-e $filepath)!=1) {
1288: mkdir($filepath,0777);
1289: }
1290: }
1291: }
1292: if ($action eq 'copy') {
1293: if ($source eq '') {
1294: $fetchresult = 'no source file';
1295: return $fetchresult;
1296: } else {
1297: my $destination = $filepath.'/'.$fname;
1298: rename($source,$destination);
1299: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1300: $docuhome);
1301: }
1302: } elsif ($action eq 'uploaddoc') {
1303: open(my $fh,'>'.$filepath.'/'.$fname);
1304: print $fh $ENV{'form.'.$source};
1305: close($fh);
1306: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1307: $docuhome);
1308: if ($fetchresult eq 'ok') {
1309: return '/uploaded/'.$fpath.'/'.$fname;
1310: } else {
1311: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1312: ' to host '.$docuhome.': '.$fetchresult);
1313: return '/adm/notfound.html';
1314: }
1315: }
1316: }
1317: unless ( $fetchresult eq 'ok') {
1318: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1319: ' to host '.$docuhome.': '.$fetchresult);
1320: }
1321: return $fetchresult;
1322: }
1323:
1324: # --------------- Take an uploaded file and put it into the userfiles directory
1325: # input: name of form element, coursedoc=1 means this is for the course
1326: # output: url of file in userspace
1327:
1328: sub clean_filename {
1329: my ($fname)=@_;
1330: # Replace Windows backslashes by forward slashes
1331: $fname=~s/\\/\//g;
1332: # Get rid of everything but the actual filename
1333: $fname=~s/^.*\/([^\/]+)$/$1/;
1334: # Replace spaces by underscores
1335: $fname=~s/\s+/\_/g;
1336: # Replace all other weird characters by nothing
1337: $fname=~s/[^\w\.\-]//g;
1338: # Replace all .\d. sequences with _\d. so they no longer look like version
1339: # numbers
1340: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1341: return $fname;
1342: }
1343:
1344: sub userfileupload {
1345: my ($formname,$coursedoc,$subdir)=@_;
1346: if (!defined($subdir)) { $subdir='unknown'; }
1347: my $fname=$ENV{'form.'.$formname.'.filename'};
1348: $fname=&clean_filename($fname);
1349: # See if there is anything left
1350: unless ($fname) { return 'error: no uploaded file'; }
1351: chop($ENV{'form.'.$formname});
1352: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1353: my $now = time;
1354: my $filepath = 'tmp/helprequests/'.$now;
1355: my @parts=split(/\//,$filepath);
1356: my $fullpath = $perlvar{'lonDaemons'};
1357: for (my $i=0;$i<@parts;$i++) {
1358: $fullpath .= '/'.$parts[$i];
1359: if ((-e $fullpath)!=1) {
1360: mkdir($fullpath,0777);
1361: }
1362: }
1363: open(my $fh,'>'.$fullpath.'/'.$fname);
1364: print $fh $ENV{'form.'.$formname};
1365: close($fh);
1366: return $fullpath.'/'.$fname;
1367: }
1368: # Create the directory if not present
1369: my $docuname='';
1370: my $docudom='';
1371: my $docuhome='';
1372: $fname="$subdir/$fname";
1373: if ($coursedoc) {
1374: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1375: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1376: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1377: if ($ENV{'form.folder'} =~ m/^default/) {
1378: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1379: } else {
1380: $fname=$ENV{'form.folder'}.'/'.$fname;
1381: return &process_coursefile('uploaddoc',$docuname,$docudom,$docuhome,$fname,$formname);
1382: }
1383: } else {
1384: $docuname=$ENV{'user.name'};
1385: $docudom=$ENV{'user.domain'};
1386: $docuhome=$ENV{'user.home'};
1387: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1388: }
1389: }
1390:
1391: sub finishuserfileupload {
1392: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1393: my $path=$docudom.'/'.$docuname.'/';
1394: my $filepath=$perlvar{'lonDocRoot'};
1395: my ($fnamepath,$file);
1396: $file=$fname;
1397: if ($fname=~m|/|) {
1398: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1399: $path.=$fnamepath.'/';
1400: }
1401: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1402: my $count;
1403: for ($count=4;$count<=$#parts;$count++) {
1404: $filepath.="/$parts[$count]";
1405: if ((-e $filepath)!=1) {
1406: mkdir($filepath,0777);
1407: }
1408: }
1409: # Save the file
1410: {
1411: #&Apache::lonnet::logthis("Saving to $filepath $file");
1412: open(my $fh,'>'.$filepath.'/'.$file);
1413: print $fh $ENV{'form.'.$formname};
1414: close($fh);
1415: }
1416: # Notify homeserver to grep it
1417: #
1418: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1419: if ($fetchresult eq 'ok') {
1420: #
1421: # Return the URL to it
1422: return '/uploaded/'.$path.$file;
1423: } else {
1424: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1425: ': '.$fetchresult);
1426: return '/adm/notfound.html';
1427: }
1428: }
1429:
1430: sub removeuploadedurl {
1431: my ($url)=@_;
1432: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1433: return &Apache::lonnet::removeuserfile($uname,$udom,$fname);
1434: }
1435:
1436: sub removeuserfile {
1437: my ($docuname,$docudom,$fname)=@_;
1438: my $home=&homeserver($docuname,$docudom);
1439: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1440: }
1441:
1442: sub mkdiruserfile {
1443: my ($docuname,$docudom,$dir)=@_;
1444: my $home=&homeserver($docuname,$docudom);
1445: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1446: }
1447:
1448: sub renameuserfile {
1449: my ($docuname,$docudom,$old,$new)=@_;
1450: my $home=&homeserver($docuname,$docudom);
1451: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1452: &escape("$new"),$home);
1453: }
1454:
1455: # ------------------------------------------------------------------------- Log
1456:
1457: sub log {
1458: my ($dom,$nam,$hom,$what)=@_;
1459: return critical("log:$dom:$nam:$what",$hom);
1460: }
1461:
1462: # ------------------------------------------------------------------ Course Log
1463: #
1464: # This routine flushes several buffers of non-mission-critical nature
1465: #
1466:
1467: sub flushcourselogs {
1468: &logthis('Flushing log buffers');
1469: #
1470: # course logs
1471: # This is a log of all transactions in a course, which can be used
1472: # for data mining purposes
1473: #
1474: # It also collects the courseid database, which lists last transaction
1475: # times and course titles for all courseids
1476: #
1477: my %courseidbuffer=();
1478: foreach (keys %courselogs) {
1479: my $crsid=$_;
1480: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1481: &escape($courselogs{$crsid}),
1482: $coursehombuf{$crsid}) eq 'ok') {
1483: delete $courselogs{$crsid};
1484: } else {
1485: &logthis('Failed to flush log buffer for '.$crsid);
1486: if (length($courselogs{$crsid})>40000) {
1487: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1488: " exceeded maximum size, deleting.</font>");
1489: delete $courselogs{$crsid};
1490: }
1491: }
1492: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1493: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1494: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1495: '='.&escape($courseinstcodebuf{$crsid});
1496: } else {
1497: $courseidbuffer{$coursehombuf{$crsid}}=
1498: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1499: '='.&escape($courseinstcodebuf{$crsid});
1500: }
1501: }
1502: #
1503: # Write course id database (reverse lookup) to homeserver of courses
1504: # Is used in pickcourse
1505: #
1506: foreach (keys %courseidbuffer) {
1507: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1508: }
1509: #
1510: # File accesses
1511: # Writes to the dynamic metadata of resources to get hit counts, etc.
1512: #
1513: foreach my $entry (keys(%accesshash)) {
1514: if ($entry =~ /___count$/) {
1515: my ($dom,$name);
1516: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1517: if (! defined($dom) || $dom eq '' ||
1518: ! defined($name) || $name eq '') {
1519: my $cid = $ENV{'request.course.id'};
1520: $dom = $ENV{'request.'.$cid.'.domain'};
1521: $name = $ENV{'request.'.$cid.'.num'};
1522: }
1523: my $value = $accesshash{$entry};
1524: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1525: my %temphash=($url => $value);
1526: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1527: if ($result eq 'ok') {
1528: delete $accesshash{$entry};
1529: } elsif ($result eq 'unknown_cmd') {
1530: # Target server has old code running on it.
1531: my %temphash=($entry => $value);
1532: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1533: delete $accesshash{$entry};
1534: }
1535: }
1536: } else {
1537: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1538: my %temphash=($entry => $accesshash{$entry});
1539: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1540: delete $accesshash{$entry};
1541: }
1542: }
1543: }
1544: #
1545: # Roles
1546: # Reverse lookup of user roles for course faculty/staff and co-authorship
1547: #
1548: foreach (keys %userrolehash) {
1549: my $entry=$_;
1550: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1551: split(/\:/,$entry);
1552: if (&Apache::lonnet::put('nohist_userroles',
1553: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1554: $rudom,$runame) eq 'ok') {
1555: delete $userrolehash{$entry};
1556: }
1557: }
1558: $dumpcount++;
1559: }
1560:
1561: sub courselog {
1562: my $what=shift;
1563: $what=time.':'.$what;
1564: unless ($ENV{'request.course.id'}) { return ''; }
1565: $coursedombuf{$ENV{'request.course.id'}}=
1566: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1567: $coursenumbuf{$ENV{'request.course.id'}}=
1568: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1569: $coursehombuf{$ENV{'request.course.id'}}=
1570: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1571: $coursedescrbuf{$ENV{'request.course.id'}}=
1572: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1573: $courseinstcodebuf{$ENV{'request.course.id'}}=
1574: $ENV{'course.'.$ENV{'request.course.id'}.'.internal.coursecode'};
1575: if (defined $courselogs{$ENV{'request.course.id'}}) {
1576: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1577: } else {
1578: $courselogs{$ENV{'request.course.id'}}.=$what;
1579: }
1580: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1581: &flushcourselogs();
1582: }
1583: }
1584:
1585: sub courseacclog {
1586: my $fnsymb=shift;
1587: unless ($ENV{'request.course.id'}) { return ''; }
1588: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1589: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1590: $what.=':POST';
1591: foreach (keys %ENV) {
1592: if ($_=~/^form\.(.*)/) {
1593: $what.=':'.$1.'='.$ENV{$_};
1594: }
1595: }
1596: }
1597: &courselog($what);
1598: }
1599:
1600: sub countacc {
1601: my $url=&declutter(shift);
1602: return if (! defined($url) || $url eq '');
1603: unless ($ENV{'request.course.id'}) { return ''; }
1604: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1605: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1606: $accesshash{$key}++;
1607: }
1608:
1609: sub linklog {
1610: my ($from,$to)=@_;
1611: $from=&declutter($from);
1612: $to=&declutter($to);
1613: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1614: $accesshash{$to.'___'.$from.'___goto'}=1;
1615: }
1616:
1617: sub userrolelog {
1618: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1619: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1620: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1621: ($trole=~/^cr/) || ($trole=~/^ta/)) {
1622: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1623: $userrolehash
1624: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1625: =$tend.':'.$tstart;
1626: }
1627: }
1628:
1629: sub get_course_adv_roles {
1630: my $cid=shift;
1631: $cid=$ENV{'request.course.id'} unless (defined($cid));
1632: my %coursehash=&coursedescription($cid);
1633: my %nothide=();
1634: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1635: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1636: }
1637: my %returnhash=();
1638: my %dumphash=
1639: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1640: my $now=time;
1641: foreach (keys %dumphash) {
1642: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1643: if (($tstart) && ($tstart<0)) { next; }
1644: if (($tend) && ($tend<$now)) { next; }
1645: if (($tstart) && ($now<$tstart)) { next; }
1646: my ($role,$username,$domain,$section)=split(/\:/,$_);
1647: if ((&privileged($username,$domain)) &&
1648: (!$nothide{$username.':'.$domain})) { next; }
1649: my $key=&plaintext($role);
1650: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1651: if ($returnhash{$key}) {
1652: $returnhash{$key}.=','.$username.':'.$domain;
1653: } else {
1654: $returnhash{$key}=$username.':'.$domain;
1655: }
1656: }
1657: return %returnhash;
1658: }
1659:
1660: sub get_my_roles {
1661: my ($uname,$udom)=@_;
1662: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1663: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1664: my %dumphash=
1665: &dump('nohist_userroles',$udom,$uname);
1666: my %returnhash=();
1667: my $now=time;
1668: foreach (keys %dumphash) {
1669: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1670: if (($tstart) && ($tstart<0)) { next; }
1671: if (($tend) && ($tend<$now)) { next; }
1672: if (($tstart) && ($now<$tstart)) { next; }
1673: my ($role,$username,$domain,$section)=split(/\:/,$_);
1674: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1675: }
1676: return %returnhash;
1677: }
1678:
1679: # ----------------------------------------------------- Frontpage Announcements
1680: #
1681: #
1682:
1683: sub postannounce {
1684: my ($server,$text)=@_;
1685: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1686: unless ($text=~/\w/) { $text=''; }
1687: return &reply('setannounce:'.&escape($text),$server);
1688: }
1689:
1690: sub getannounce {
1691:
1692: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1693: my $announcement='';
1694: while (<$fh>) { $announcement .=$_; }
1695: close($fh);
1696: if ($announcement=~/\w/) {
1697: return
1698: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1699: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1700: } else {
1701: return '';
1702: }
1703: } else {
1704: return '';
1705: }
1706: }
1707:
1708: # ---------------------------------------------------------- Course ID routines
1709: # Deal with domain's nohist_courseid.db files
1710: #
1711:
1712: sub courseidput {
1713: my ($domain,$what,$coursehome)=@_;
1714: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1715: }
1716:
1717: sub courseiddump {
1718: my ($domfilter,$descfilter,$sincefilter,$hostidflag,$hostidref)=@_;
1719: my %returnhash=();
1720: unless ($domfilter) { $domfilter=''; }
1721: foreach my $tryserver (keys %libserv) {
1722: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1723: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1724: foreach (
1725: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1726: $sincefilter.':'.&escape($descfilter),
1727: $tryserver))) {
1728: my ($key,$value)=split(/\=/,$_);
1729: if (($key) && ($value)) {
1730: $returnhash{&unescape($key)}=$value;
1731: }
1732: }
1733: }
1734: }
1735: }
1736: return %returnhash;
1737: }
1738:
1739: #
1740: # ----------------------------------------------------------- Check out an item
1741:
1742: sub get_first_access {
1743: my ($type,$argsymb)=@_;
1744: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1745: if ($argsymb) { $symb=$argsymb; }
1746: my ($map,$id,$res)=&decode_symb($symb);
1747: if ($type eq 'map') { $res=$map; }
1748: my %times=&get('firstaccesstimes',[$res],$udom,$uname);
1749: return $times{$res};
1750: }
1751:
1752: sub set_first_access {
1753: my ($type)=@_;
1754: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1755: my ($map,$id,$res)=&decode_symb($symb);
1756: if ($type eq 'map') { $res=$map; }
1757: my $firstaccess=&get_first_access($type);
1758: if (!$firstaccess) {
1759: return &put('firstaccesstimes',{$res=>time},$udom,$uname);
1760: }
1761: return 'already_set';
1762: }
1763:
1764: sub checkout {
1765: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1766: my $now=time;
1767: my $lonhost=$perlvar{'lonHostID'};
1768: my $infostr=&escape(
1769: 'CHECKOUTTOKEN&'.
1770: $tuname.'&'.
1771: $tudom.'&'.
1772: $tcrsid.'&'.
1773: $symb.'&'.
1774: $now.'&'.$ENV{'REMOTE_ADDR'});
1775: my $token=&reply('tmpput:'.$infostr,$lonhost);
1776: if ($token=~/^error\:/) {
1777: &logthis("<font color=blue>WARNING: ".
1778: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1779: "</font>");
1780: return '';
1781: }
1782:
1783: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1784: $token=~tr/a-z/A-Z/;
1785:
1786: my %infohash=('resource.0.outtoken' => $token,
1787: 'resource.0.checkouttime' => $now,
1788: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1789:
1790: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1791: return '';
1792: } else {
1793: &logthis("<font color=blue>WARNING: ".
1794: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1795: "</font>");
1796: }
1797:
1798: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1799: &escape('Checkout '.$infostr.' - '.
1800: $token)) ne 'ok') {
1801: return '';
1802: } else {
1803: &logthis("<font color=blue>WARNING: ".
1804: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1805: "</font>");
1806: }
1807: return $token;
1808: }
1809:
1810: # ------------------------------------------------------------ Check in an item
1811:
1812: sub checkin {
1813: my $token=shift;
1814: my $now=time;
1815: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1816: $lonhost=~tr/A-Z/a-z/;
1817: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1818: $dtoken=~s/\W/\_/g;
1819: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1820: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1821:
1822: unless (($tuname) && ($tudom)) {
1823: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1824: return '';
1825: }
1826:
1827: unless (&allowed('mgr',$tcrsid)) {
1828: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1829: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1830: return '';
1831: }
1832:
1833: my %infohash=('resource.0.intoken' => $token,
1834: 'resource.0.checkintime' => $now,
1835: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1836:
1837: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1838: return '';
1839: }
1840:
1841: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1842: &escape('Checkin - '.$token)) ne 'ok') {
1843: return '';
1844: }
1845:
1846: return ($symb,$tuname,$tudom,$tcrsid);
1847: }
1848:
1849: # --------------------------------------------- Set Expire Date for Spreadsheet
1850:
1851: sub expirespread {
1852: my ($uname,$udom,$stype,$usymb)=@_;
1853: my $cid=$ENV{'request.course.id'};
1854: if ($cid) {
1855: my $now=time;
1856: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1857: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1858: $ENV{'course.'.$cid.'.num'}.
1859: ':nohist_expirationdates:'.
1860: &escape($key).'='.$now,
1861: $ENV{'course.'.$cid.'.home'})
1862: }
1863: return 'ok';
1864: }
1865:
1866: # ----------------------------------------------------- Devalidate Spreadsheets
1867:
1868: sub devalidate {
1869: my ($symb,$uname,$udom)=@_;
1870: my $cid=$ENV{'request.course.id'};
1871: if ($cid) {
1872: # delete the stored spreadsheets for
1873: # - the student level sheet of this user in course's homespace
1874: # - the assessment level sheet for this resource
1875: # for this user in user's homespace
1876: # - current conditional state info
1877: my $key=$uname.':'.$udom.':';
1878: my $status=
1879: &del('nohist_calculatedsheets',
1880: [$key.'studentcalc:'],
1881: $ENV{'course.'.$cid.'.domain'},
1882: $ENV{'course.'.$cid.'.num'})
1883: .' '.
1884: &del('nohist_calculatedsheets_'.$cid,
1885: [$key.'assesscalc:'.$symb],$udom,$uname);
1886: unless ($status eq 'ok ok') {
1887: &logthis('Could not devalidate spreadsheet '.
1888: $uname.' at '.$udom.' for '.
1889: $symb.': '.$status);
1890: }
1891: &delenv('user.state.'.$cid);
1892: }
1893: }
1894:
1895: sub get_scalar {
1896: my ($string,$end) = @_;
1897: my $value;
1898: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1899: $value = $1;
1900: } elsif ($$string =~ s/^([^&]*?)&//) {
1901: $value = $1;
1902: }
1903: return &unescape($value);
1904: }
1905:
1906: sub array2str {
1907: my (@array) = @_;
1908: my $result=&arrayref2str(\@array);
1909: $result=~s/^__ARRAY_REF__//;
1910: $result=~s/__END_ARRAY_REF__$//;
1911: return $result;
1912: }
1913:
1914: sub arrayref2str {
1915: my ($arrayref) = @_;
1916: my $result='__ARRAY_REF__';
1917: foreach my $elem (@$arrayref) {
1918: if(ref($elem) eq 'ARRAY') {
1919: $result.=&arrayref2str($elem).'&';
1920: } elsif(ref($elem) eq 'HASH') {
1921: $result.=&hashref2str($elem).'&';
1922: } elsif(ref($elem)) {
1923: #print("Got a ref of ".(ref($elem))." skipping.");
1924: } else {
1925: $result.=&escape($elem).'&';
1926: }
1927: }
1928: $result=~s/\&$//;
1929: $result .= '__END_ARRAY_REF__';
1930: return $result;
1931: }
1932:
1933: sub hash2str {
1934: my (%hash) = @_;
1935: my $result=&hashref2str(\%hash);
1936: $result=~s/^__HASH_REF__//;
1937: $result=~s/__END_HASH_REF__$//;
1938: return $result;
1939: }
1940:
1941: sub hashref2str {
1942: my ($hashref)=@_;
1943: my $result='__HASH_REF__';
1944: foreach (sort(keys(%$hashref))) {
1945: if (ref($_) eq 'ARRAY') {
1946: $result.=&arrayref2str($_).'=';
1947: } elsif (ref($_) eq 'HASH') {
1948: $result.=&hashref2str($_).'=';
1949: } elsif (ref($_)) {
1950: $result.='=';
1951: #print("Got a ref of ".(ref($_))." skipping.");
1952: } else {
1953: if ($_) {$result.=&escape($_).'=';} else { last; }
1954: }
1955:
1956: if(ref($hashref->{$_}) eq 'ARRAY') {
1957: $result.=&arrayref2str($hashref->{$_}).'&';
1958: } elsif(ref($hashref->{$_}) eq 'HASH') {
1959: $result.=&hashref2str($hashref->{$_}).'&';
1960: } elsif(ref($hashref->{$_})) {
1961: $result.='&';
1962: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1963: } else {
1964: $result.=&escape($hashref->{$_}).'&';
1965: }
1966: }
1967: $result=~s/\&$//;
1968: $result .= '__END_HASH_REF__';
1969: return $result;
1970: }
1971:
1972: sub str2hash {
1973: my ($string)=@_;
1974: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1975: return %$hash;
1976: }
1977:
1978: sub str2hashref {
1979: my ($string) = @_;
1980:
1981: my %hash;
1982:
1983: if($string !~ /^__HASH_REF__/) {
1984: if (! ($string eq '' || !defined($string))) {
1985: $hash{'error'}='Not hash reference';
1986: }
1987: return (\%hash, $string);
1988: }
1989:
1990: $string =~ s/^__HASH_REF__//;
1991:
1992: while($string !~ /^__END_HASH_REF__/) {
1993: #key
1994: my $key='';
1995: if($string =~ /^__HASH_REF__/) {
1996: ($key, $string)=&str2hashref($string);
1997: if(defined($key->{'error'})) {
1998: $hash{'error'}='Bad data';
1999: return (\%hash, $string);
2000: }
2001: } elsif($string =~ /^__ARRAY_REF__/) {
2002: ($key, $string)=&str2arrayref($string);
2003: if($key->[0] eq 'Array reference error') {
2004: $hash{'error'}='Bad data';
2005: return (\%hash, $string);
2006: }
2007: } else {
2008: $string =~ s/^(.*?)=//;
2009: $key=&unescape($1);
2010: }
2011: $string =~ s/^=//;
2012:
2013: #value
2014: my $value='';
2015: if($string =~ /^__HASH_REF__/) {
2016: ($value, $string)=&str2hashref($string);
2017: if(defined($value->{'error'})) {
2018: $hash{'error'}='Bad data';
2019: return (\%hash, $string);
2020: }
2021: } elsif($string =~ /^__ARRAY_REF__/) {
2022: ($value, $string)=&str2arrayref($string);
2023: if($value->[0] eq 'Array reference error') {
2024: $hash{'error'}='Bad data';
2025: return (\%hash, $string);
2026: }
2027: } else {
2028: $value=&get_scalar(\$string,'__END_HASH_REF__');
2029: }
2030: $string =~ s/^&//;
2031:
2032: $hash{$key}=$value;
2033: }
2034:
2035: $string =~ s/^__END_HASH_REF__//;
2036:
2037: return (\%hash, $string);
2038: }
2039:
2040: sub str2array {
2041: my ($string)=@_;
2042: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2043: return @$array;
2044: }
2045:
2046: sub str2arrayref {
2047: my ($string) = @_;
2048: my @array;
2049:
2050: if($string !~ /^__ARRAY_REF__/) {
2051: if (! ($string eq '' || !defined($string))) {
2052: $array[0]='Array reference error';
2053: }
2054: return (\@array, $string);
2055: }
2056:
2057: $string =~ s/^__ARRAY_REF__//;
2058:
2059: while($string !~ /^__END_ARRAY_REF__/) {
2060: my $value='';
2061: if($string =~ /^__HASH_REF__/) {
2062: ($value, $string)=&str2hashref($string);
2063: if(defined($value->{'error'})) {
2064: $array[0] ='Array reference error';
2065: return (\@array, $string);
2066: }
2067: } elsif($string =~ /^__ARRAY_REF__/) {
2068: ($value, $string)=&str2arrayref($string);
2069: if($value->[0] eq 'Array reference error') {
2070: $array[0] ='Array reference error';
2071: return (\@array, $string);
2072: }
2073: } else {
2074: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2075: }
2076: $string =~ s/^&//;
2077:
2078: push(@array, $value);
2079: }
2080:
2081: $string =~ s/^__END_ARRAY_REF__//;
2082:
2083: return (\@array, $string);
2084: }
2085:
2086: # -------------------------------------------------------------------Temp Store
2087:
2088: sub tmpreset {
2089: my ($symb,$namespace,$domain,$stuname) = @_;
2090: if (!$symb) {
2091: $symb=&symbread();
2092: if (!$symb) { $symb= $ENV{'request.url'}; }
2093: }
2094: $symb=escape($symb);
2095:
2096: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2097: $namespace=~s/\//\_/g;
2098: $namespace=~s/\W//g;
2099:
2100: #FIXME needs to do something for /pub resources
2101: if (!$domain) { $domain=$ENV{'user.domain'}; }
2102: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2103: my $path=$perlvar{'lonDaemons'}.'/tmp';
2104: my %hash;
2105: if (tie(%hash,'GDBM_File',
2106: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2107: &GDBM_WRCREAT(),0640)) {
2108: foreach my $key (keys %hash) {
2109: if ($key=~ /:$symb/) {
2110: delete($hash{$key});
2111: }
2112: }
2113: }
2114: }
2115:
2116: sub tmpstore {
2117: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2118:
2119: if (!$symb) {
2120: $symb=&symbread();
2121: if (!$symb) { $symb= $ENV{'request.url'}; }
2122: }
2123: $symb=escape($symb);
2124:
2125: if (!$namespace) {
2126: # I don't think we would ever want to store this for a course.
2127: # it seems this will only be used if we don't have a course.
2128: #$namespace=$ENV{'request.course.id'};
2129: #if (!$namespace) {
2130: $namespace=$ENV{'request.state'};
2131: #}
2132: }
2133: $namespace=~s/\//\_/g;
2134: $namespace=~s/\W//g;
2135: #FIXME needs to do something for /pub resources
2136: if (!$domain) { $domain=$ENV{'user.domain'}; }
2137: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2138: my $now=time;
2139: my %hash;
2140: my $path=$perlvar{'lonDaemons'}.'/tmp';
2141: if (tie(%hash,'GDBM_File',
2142: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2143: &GDBM_WRCREAT(),0640)) {
2144: $hash{"version:$symb"}++;
2145: my $version=$hash{"version:$symb"};
2146: my $allkeys='';
2147: foreach my $key (keys(%$storehash)) {
2148: $allkeys.=$key.':';
2149: $hash{"$version:$symb:$key"}=$$storehash{$key};
2150: }
2151: $hash{"$version:$symb:timestamp"}=$now;
2152: $allkeys.='timestamp';
2153: $hash{"$version:keys:$symb"}=$allkeys;
2154: if (untie(%hash)) {
2155: return 'ok';
2156: } else {
2157: return "error:$!";
2158: }
2159: } else {
2160: return "error:$!";
2161: }
2162: }
2163:
2164: # -----------------------------------------------------------------Temp Restore
2165:
2166: sub tmprestore {
2167: my ($symb,$namespace,$domain,$stuname) = @_;
2168:
2169: if (!$symb) {
2170: $symb=&symbread();
2171: if (!$symb) { $symb= $ENV{'request.url'}; }
2172: }
2173: $symb=escape($symb);
2174:
2175: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2176: #FIXME needs to do something for /pub resources
2177: if (!$domain) { $domain=$ENV{'user.domain'}; }
2178: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2179:
2180: my %returnhash;
2181: $namespace=~s/\//\_/g;
2182: $namespace=~s/\W//g;
2183: my %hash;
2184: my $path=$perlvar{'lonDaemons'}.'/tmp';
2185: if (tie(%hash,'GDBM_File',
2186: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2187: &GDBM_READER(),0640)) {
2188: my $version=$hash{"version:$symb"};
2189: $returnhash{'version'}=$version;
2190: my $scope;
2191: for ($scope=1;$scope<=$version;$scope++) {
2192: my $vkeys=$hash{"$scope:keys:$symb"};
2193: my @keys=split(/:/,$vkeys);
2194: my $key;
2195: $returnhash{"$scope:keys"}=$vkeys;
2196: foreach $key (@keys) {
2197: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
2198: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
2199: }
2200: }
2201: if (!(untie(%hash))) {
2202: return "error:$!";
2203: }
2204: } else {
2205: return "error:$!";
2206: }
2207: return %returnhash;
2208: }
2209:
2210: # ----------------------------------------------------------------------- Store
2211:
2212: sub store {
2213: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2214: my $home='';
2215:
2216: if ($stuname) { $home=&homeserver($stuname,$domain); }
2217:
2218: $symb=&symbclean($symb);
2219: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2220:
2221: if (!$domain) { $domain=$ENV{'user.domain'}; }
2222: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2223:
2224: &devalidate($symb,$stuname,$domain);
2225:
2226: $symb=escape($symb);
2227: if (!$namespace) {
2228: unless ($namespace=$ENV{'request.course.id'}) {
2229: return '';
2230: }
2231: }
2232: if (!$home) { $home=$ENV{'user.home'}; }
2233:
2234: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2235: $$storehash{'host'}=$perlvar{'lonHostID'};
2236:
2237: my $namevalue='';
2238: foreach (keys %$storehash) {
2239: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2240: }
2241: $namevalue=~s/\&$//;
2242: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2243: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2244: }
2245:
2246: # -------------------------------------------------------------- Critical Store
2247:
2248: sub cstore {
2249: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2250: my $home='';
2251:
2252: if ($stuname) { $home=&homeserver($stuname,$domain); }
2253:
2254: $symb=&symbclean($symb);
2255: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2256:
2257: if (!$domain) { $domain=$ENV{'user.domain'}; }
2258: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2259:
2260: &devalidate($symb,$stuname,$domain);
2261:
2262: $symb=escape($symb);
2263: if (!$namespace) {
2264: unless ($namespace=$ENV{'request.course.id'}) {
2265: return '';
2266: }
2267: }
2268: if (!$home) { $home=$ENV{'user.home'}; }
2269:
2270: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2271: $$storehash{'host'}=$perlvar{'lonHostID'};
2272:
2273: my $namevalue='';
2274: foreach (keys %$storehash) {
2275: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2276: }
2277: $namevalue=~s/\&$//;
2278: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2279: return critical
2280: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2281: }
2282:
2283: # --------------------------------------------------------------------- Restore
2284:
2285: sub restore {
2286: my ($symb,$namespace,$domain,$stuname) = @_;
2287: my $home='';
2288:
2289: if ($stuname) { $home=&homeserver($stuname,$domain); }
2290:
2291: if (!$symb) {
2292: unless ($symb=escape(&symbread())) { return ''; }
2293: } else {
2294: $symb=&escape(&symbclean($symb));
2295: }
2296: if (!$namespace) {
2297: unless ($namespace=$ENV{'request.course.id'}) {
2298: return '';
2299: }
2300: }
2301: if (!$domain) { $domain=$ENV{'user.domain'}; }
2302: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2303: if (!$home) { $home=$ENV{'user.home'}; }
2304: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2305:
2306: my %returnhash=();
2307: foreach (split(/\&/,$answer)) {
2308: my ($name,$value)=split(/\=/,$_);
2309: $returnhash{&unescape($name)}=&unescape($value);
2310: }
2311: my $version;
2312: for ($version=1;$version<=$returnhash{'version'};$version++) {
2313: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2314: $returnhash{$_}=$returnhash{$version.':'.$_};
2315: }
2316: }
2317: return %returnhash;
2318: }
2319:
2320: # ---------------------------------------------------------- Course Description
2321:
2322: sub coursedescription {
2323: my $courseid=shift;
2324: $courseid=~s/^\///;
2325: $courseid=~s/\_/\//g;
2326: my ($cdomain,$cnum)=split(/\//,$courseid);
2327: my $chome=&homeserver($cnum,$cdomain);
2328: my $normalid=$cdomain.'_'.$cnum;
2329: # need to always cache even if we get errors otherwise we keep
2330: # trying and trying and trying to get the course description.
2331: my %envhash=();
2332: my %returnhash=();
2333: $envhash{'course.'.$normalid.'.last_cache'}=time;
2334: if ($chome ne 'no_host') {
2335: %returnhash=&dump('environment',$cdomain,$cnum);
2336: if (!exists($returnhash{'con_lost'})) {
2337: $returnhash{'home'}= $chome;
2338: $returnhash{'domain'} = $cdomain;
2339: $returnhash{'num'} = $cnum;
2340: while (my ($name,$value) = each %returnhash) {
2341: $envhash{'course.'.$normalid.'.'.$name}=$value;
2342: }
2343: $returnhash{'url'}=&clutter($returnhash{'url'});
2344: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2345: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
2346: $envhash{'course.'.$normalid.'.home'}=$chome;
2347: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2348: $envhash{'course.'.$normalid.'.num'}=$cnum;
2349: }
2350: }
2351: &appenv(%envhash);
2352: return %returnhash;
2353: }
2354:
2355: # -------------------------------------------------See if a user is privileged
2356:
2357: sub privileged {
2358: my ($username,$domain)=@_;
2359: my $rolesdump=&reply("dump:$domain:$username:roles",
2360: &homeserver($username,$domain));
2361: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2362: my $now=time;
2363: if ($rolesdump ne '') {
2364: foreach (split(/&/,$rolesdump)) {
2365: if ($_!~/^rolesdef\&/) {
2366: my ($area,$role)=split(/=/,$_);
2367: $area=~s/\_\w\w$//;
2368: my ($trole,$tend,$tstart)=split(/_/,$role);
2369: if (($trole eq 'dc') || ($trole eq 'su')) {
2370: my $active=1;
2371: if ($tend) {
2372: if ($tend<$now) { $active=0; }
2373: }
2374: if ($tstart) {
2375: if ($tstart>$now) { $active=0; }
2376: }
2377: if ($active) { return 1; }
2378: }
2379: }
2380: }
2381: }
2382: return 0;
2383: }
2384:
2385: # -------------------------------------------------------- Get user privileges
2386:
2387: sub rolesinit {
2388: my ($domain,$username,$authhost)=@_;
2389: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2390: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2391: my %allroles=();
2392: my %thesepriv=();
2393: my $now=time;
2394: my $userroles="user.login.time=$now\n";
2395: my $thesestr;
2396:
2397: if ($rolesdump ne '') {
2398: foreach (split(/&/,$rolesdump)) {
2399: if ($_!~/^rolesdef\&/) {
2400: my ($area,$role)=split(/=/,$_);
2401: $area=~s/\_\w\w$//;
2402: my ($trole,$tend,$tstart)=split(/_/,$role);
2403: $userroles.='user.role.'.$trole.'.'.$area.'='.
2404: $tstart.'.'.$tend."\n";
2405: # log the associated role with the area
2406: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2407: if ($tend!=0) {
2408: if ($tend<$now) {
2409: $trole='';
2410: }
2411: }
2412: if ($tstart!=0) {
2413: if ($tstart>$now) {
2414: $trole='';
2415: }
2416: }
2417: if (($area ne '') && ($trole ne '')) {
2418: my $spec=$trole.'.'.$area;
2419: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2420: if ($trole =~ /^cr\//) {
2421: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2422: my $homsvr=homeserver($rauthor,$rdomain);
2423: if ($hostname{$homsvr} ne '') {
2424: my ($rdummy,$roledef)=
2425: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2426:
2427: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2428: my ($syspriv,$dompriv,$coursepriv)=
2429: split(/\_/,$roledef);
2430: if (defined($syspriv)) {
2431: $allroles{'cm./'}.=':'.$syspriv;
2432: $allroles{$spec.'./'}.=':'.$syspriv;
2433: }
2434: if ($tdomain ne '') {
2435: if (defined($dompriv)) {
2436: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2437: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2438: }
2439: if ($trest ne '') {
2440: if (defined($coursepriv)) {
2441: $allroles{'cm.'.$area}.=':'.$coursepriv;
2442: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
2443: }
2444: }
2445: }
2446: }
2447: }
2448: } else {
2449: if (defined($pr{$trole.':s'})) {
2450: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
2451: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2452: }
2453: if ($tdomain ne '') {
2454: if (defined($pr{$trole.':d'})) {
2455: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2456: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2457: }
2458: if ($trest ne '') {
2459: if (defined($pr{$trole.':c'})) {
2460: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2461: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2462: }
2463: }
2464: }
2465: }
2466: }
2467: }
2468: }
2469: my $adv=0;
2470: my $author=0;
2471: foreach (keys %allroles) {
2472: %thesepriv=();
2473: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
2474: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2475: foreach (split(/:/,$allroles{$_})) {
2476: if ($_ ne '') {
2477: my ($privilege,$restrictions)=split(/&/,$_);
2478: if ($restrictions eq '') {
2479: $thesepriv{$privilege}='F';
2480: } else {
2481: if ($thesepriv{$privilege} ne 'F') {
2482: $thesepriv{$privilege}.=$restrictions;
2483: }
2484: }
2485: }
2486: }
2487: $thesestr='';
2488: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2489: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
2490: }
2491: $userroles.='user.adv='.$adv."\n".
2492: 'user.author='.$author."\n";
2493: $ENV{'user.adv'}=$adv;
2494: }
2495: return $userroles;
2496: }
2497:
2498: # --------------------------------------------------------------- get interface
2499:
2500: sub get {
2501: my ($namespace,$storearr,$udomain,$uname)=@_;
2502: my $items='';
2503: foreach (@$storearr) {
2504: $items.=escape($_).'&';
2505: }
2506: $items=~s/\&$//;
2507: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2508: if (!$uname) { $uname=$ENV{'user.name'}; }
2509: my $uhome=&homeserver($uname,$udomain);
2510:
2511: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2512: my @pairs=split(/\&/,$rep);
2513: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2514: return @pairs;
2515: }
2516: my %returnhash=();
2517: my $i=0;
2518: foreach (@$storearr) {
2519: $returnhash{$_}=unescape($pairs[$i]);
2520: $i++;
2521: }
2522: return %returnhash;
2523: }
2524:
2525: # --------------------------------------------------------------- del interface
2526:
2527: sub del {
2528: my ($namespace,$storearr,$udomain,$uname)=@_;
2529: my $items='';
2530: foreach (@$storearr) {
2531: $items.=escape($_).'&';
2532: }
2533: $items=~s/\&$//;
2534: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2535: if (!$uname) { $uname=$ENV{'user.name'}; }
2536: my $uhome=&homeserver($uname,$udomain);
2537:
2538: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2539: }
2540:
2541: # -------------------------------------------------------------- dump interface
2542:
2543: sub dump {
2544: my ($namespace,$udomain,$uname,$regexp)=@_;
2545: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2546: if (!$uname) { $uname=$ENV{'user.name'}; }
2547: my $uhome=&homeserver($uname,$udomain);
2548: if ($regexp) {
2549: $regexp=&escape($regexp);
2550: } else {
2551: $regexp='.';
2552: }
2553: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2554: my @pairs=split(/\&/,$rep);
2555: my %returnhash=();
2556: foreach (@pairs) {
2557: my ($key,$value)=split(/=/,$_);
2558: $returnhash{unescape($key)}=unescape($value);
2559: }
2560: return %returnhash;
2561: }
2562:
2563: # -------------------------------------------------------------- keys interface
2564:
2565: sub getkeys {
2566: my ($namespace,$udomain,$uname)=@_;
2567: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2568: if (!$uname) { $uname=$ENV{'user.name'}; }
2569: my $uhome=&homeserver($uname,$udomain);
2570: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2571: my @keyarray=();
2572: foreach (split(/\&/,$rep)) {
2573: push (@keyarray,&unescape($_));
2574: }
2575: return @keyarray;
2576: }
2577:
2578: # --------------------------------------------------------------- currentdump
2579: sub currentdump {
2580: my ($courseid,$sdom,$sname)=@_;
2581: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2582: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2583: $sname = $ENV{'user.name'} if (! defined($sname));
2584: my $uhome = &homeserver($sname,$sdom);
2585: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2586: return if ($rep =~ /^(error:|no_such_host)/);
2587: #
2588: my %returnhash=();
2589: #
2590: if ($rep eq "unknown_cmd") {
2591: # an old lond will not know currentdump
2592: # Do a dump and make it look like a currentdump
2593: my @tmp = &dump($courseid,$sdom,$sname,'.');
2594: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2595: my %hash = @tmp;
2596: @tmp=();
2597: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2598: } else {
2599: my @pairs=split(/\&/,$rep);
2600: foreach (@pairs) {
2601: my ($key,$value)=split(/=/,$_);
2602: my ($symb,$param) = split(/:/,$key);
2603: $returnhash{&unescape($symb)}->{&unescape($param)} =
2604: &unescape($value);
2605: }
2606: }
2607: return %returnhash;
2608: }
2609:
2610: sub convert_dump_to_currentdump{
2611: my %hash = %{shift()};
2612: my %returnhash;
2613: # Code ripped from lond, essentially. The only difference
2614: # here is the unescaping done by lonnet::dump(). Conceivably
2615: # we might run in to problems with parameter names =~ /^v\./
2616: while (my ($key,$value) = each(%hash)) {
2617: my ($v,$symb,$param) = split(/:/,$key);
2618: next if ($v eq 'version' || $symb eq 'keys');
2619: next if (exists($returnhash{$symb}) &&
2620: exists($returnhash{$symb}->{$param}) &&
2621: $returnhash{$symb}->{'v.'.$param} > $v);
2622: $returnhash{$symb}->{$param}=$value;
2623: $returnhash{$symb}->{'v.'.$param}=$v;
2624: }
2625: #
2626: # Remove all of the keys in the hashes which keep track of
2627: # the version of the parameter.
2628: while (my ($symb,$param_hash) = each(%returnhash)) {
2629: # use a foreach because we are going to delete from the hash.
2630: foreach my $key (keys(%$param_hash)) {
2631: delete($param_hash->{$key}) if ($key =~ /^v\./);
2632: }
2633: }
2634: return \%returnhash;
2635: }
2636:
2637: # --------------------------------------------------------------- inc interface
2638:
2639: sub inc {
2640: my ($namespace,$store,$udomain,$uname) = @_;
2641: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2642: if (!$uname) { $uname=$ENV{'user.name'}; }
2643: my $uhome=&homeserver($uname,$udomain);
2644: my $items='';
2645: if (! ref($store)) {
2646: # got a single value, so use that instead
2647: $items = &escape($store).'=&';
2648: } elsif (ref($store) eq 'SCALAR') {
2649: $items = &escape($$store).'=&';
2650: } elsif (ref($store) eq 'ARRAY') {
2651: $items = join('=&',map {&escape($_);} @{$store});
2652: } elsif (ref($store) eq 'HASH') {
2653: while (my($key,$value) = each(%{$store})) {
2654: $items.= &escape($key).'='.&escape($value).'&';
2655: }
2656: }
2657: $items=~s/\&$//;
2658: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2659: }
2660:
2661: # --------------------------------------------------------------- put interface
2662:
2663: sub put {
2664: my ($namespace,$storehash,$udomain,$uname)=@_;
2665: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2666: if (!$uname) { $uname=$ENV{'user.name'}; }
2667: my $uhome=&homeserver($uname,$udomain);
2668: my $items='';
2669: foreach (keys %$storehash) {
2670: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
2671: }
2672: $items=~s/\&$//;
2673: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2674: }
2675:
2676: # ---------------------------------------------------------- putstore interface
2677:
2678: sub putstore {
2679: my ($namespace,$storehash,$udomain,$uname)=@_;
2680: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2681: if (!$uname) { $uname=$ENV{'user.name'}; }
2682: my $uhome=&homeserver($uname,$udomain);
2683: my $items='';
2684: my %allitems = ();
2685: foreach (keys %$storehash) {
2686: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
2687: my $key = $1.':keys:'.$2;
2688: $allitems{$key} .= $3.':';
2689: }
2690: $items.=$_.'='.&escape($$storehash{$_}).'&';
2691: }
2692: foreach (keys %allitems) {
2693: $allitems{$_} =~ s/\:$//;
2694: $items.= $_.'='.$allitems{$_}.'&';
2695: }
2696: $items=~s/\&$//;
2697: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2698: }
2699:
2700: # ------------------------------------------------------ critical put interface
2701:
2702: sub cput {
2703: my ($namespace,$storehash,$udomain,$uname)=@_;
2704: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2705: if (!$uname) { $uname=$ENV{'user.name'}; }
2706: my $uhome=&homeserver($uname,$udomain);
2707: my $items='';
2708: foreach (keys %$storehash) {
2709: $items.=escape($_).'='.escape($$storehash{$_}).'&';
2710: }
2711: $items=~s/\&$//;
2712: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2713: }
2714:
2715: # -------------------------------------------------------------- eget interface
2716:
2717: sub eget {
2718: my ($namespace,$storearr,$udomain,$uname)=@_;
2719: my $items='';
2720: foreach (@$storearr) {
2721: $items.=escape($_).'&';
2722: }
2723: $items=~s/\&$//;
2724: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2725: if (!$uname) { $uname=$ENV{'user.name'}; }
2726: my $uhome=&homeserver($uname,$udomain);
2727: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2728: my @pairs=split(/\&/,$rep);
2729: my %returnhash=();
2730: my $i=0;
2731: foreach (@$storearr) {
2732: $returnhash{$_}=unescape($pairs[$i]);
2733: $i++;
2734: }
2735: return %returnhash;
2736: }
2737:
2738: # ---------------------------------------------- Custom access rule evaluation
2739:
2740: sub customaccess {
2741: my ($priv,$uri)=@_;
2742: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2743: $urealm=~s/^\W//;
2744: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2745: my $access=0;
2746: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2747: my ($effect,$realm,$role)=split(/\:/,$_);
2748: if ($role) {
2749: if ($role ne $urole) { next; }
2750: }
2751: foreach (split(/\s*\,\s*/,$realm)) {
2752: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2753: if ($tdom) {
2754: if ($tdom ne $udom) { next; }
2755: }
2756: if ($tcrs) {
2757: if ($tcrs ne $ucrs) { next; }
2758: }
2759: if ($tsec) {
2760: if ($tsec ne $usec) { next; }
2761: }
2762: $access=($effect eq 'allow');
2763: last;
2764: }
2765: if ($realm eq '' && $role eq '') {
2766: $access=($effect eq 'allow');
2767: }
2768: }
2769: return $access;
2770: }
2771:
2772: # ------------------------------------------------- Check for a user privilege
2773:
2774: sub allowed {
2775: my ($priv,$uri)=@_;
2776: $uri=&deversion($uri);
2777: my $orguri=$uri;
2778: $uri=&declutter($uri);
2779:
2780:
2781:
2782: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
2783: # Free bre access to adm and meta resources
2784: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
2785: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2786: return 'F';
2787: }
2788:
2789: # Free bre access to user's own portfolio contents
2790: my ($space,$domain,$name,$dir)=split('/',$uri);
2791: if (('uploaded' eq $space) && ($ENV{'user.name'} eq $name) &&
2792: ($ENV{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
2793: return 'F';
2794: }
2795:
2796: # Free bre to public access
2797:
2798: if ($priv eq 'bre') {
2799: my $copyright=&metadata($uri,'copyright');
2800: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2801: return 'F';
2802: }
2803: if ($copyright eq 'priv') {
2804: $uri=~/([^\/]+)\/([^\/]+)\//;
2805: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2806: return '';
2807: }
2808: }
2809: if ($copyright eq 'domain') {
2810: $uri=~/([^\/]+)\/([^\/]+)\//;
2811: unless (($ENV{'user.domain'} eq $1) ||
2812: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2813: return '';
2814: }
2815: }
2816: if ($ENV{'request.role'}=~ /li\.\//) {
2817: # Library role, so allow browsing of resources in this domain.
2818: return 'F';
2819: }
2820: if ($copyright eq 'custom') {
2821: unless (&customaccess($priv,$uri)) { return ''; }
2822: }
2823: }
2824: # Domain coordinator is trying to create a course
2825: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2826: # uri is the requested domain in this case.
2827: # comparison to 'request.role.domain' shows if the user has selected
2828: # a role of dc for the domain in question.
2829: return 'F' if ($uri eq $ENV{'request.role.domain'});
2830: }
2831:
2832: my $thisallowed='';
2833: my $statecond=0;
2834: my $courseprivid='';
2835:
2836: # Course
2837:
2838: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
2839: $thisallowed.=$1;
2840: }
2841:
2842: # Domain
2843:
2844: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2845: =~/\Q$priv\E\&([^\:]*)/) {
2846: $thisallowed.=$1;
2847: }
2848:
2849: # Course: uri itself is a course
2850: my $courseuri=$uri;
2851: $courseuri=~s/\_(\d)/\/$1/;
2852: $courseuri=~s/^([^\/])/\/$1/;
2853:
2854: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2855: =~/\Q$priv\E\&([^\:]*)/) {
2856: $thisallowed.=$1;
2857: }
2858:
2859: # URI is an uploaded document for this course
2860:
2861: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
2862: my $refuri=$ENV{'httpref.'.$orguri};
2863: if ($refuri) {
2864: if ($refuri =~ m|^/adm/|) {
2865: $thisallowed='F';
2866: }
2867: }
2868: }
2869:
2870: # Full access at system, domain or course-wide level? Exit.
2871:
2872: if ($thisallowed=~/F/) {
2873: return 'F';
2874: }
2875:
2876: # If this is generating or modifying users, exit with special codes
2877:
2878: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:\Q$priv\E\:/) {
2879: return $thisallowed;
2880: }
2881: #
2882: # Gathered so far: system, domain and course wide privileges
2883: #
2884: # Course: See if uri or referer is an individual resource that is part of
2885: # the course
2886:
2887: if ($ENV{'request.course.id'}) {
2888:
2889: $courseprivid=$ENV{'request.course.id'};
2890: if ($ENV{'request.course.sec'}) {
2891: $courseprivid.='/'.$ENV{'request.course.sec'};
2892: }
2893: $courseprivid=~s/\_/\//;
2894: my $checkreferer=1;
2895: my ($match,$cond)=&is_on_map($uri);
2896: if ($match) {
2897: $statecond=$cond;
2898: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2899: =~/\Q$priv\E\&([^\:]*)/) {
2900: $thisallowed.=$1;
2901: $checkreferer=0;
2902: }
2903: }
2904:
2905: if ($checkreferer) {
2906: my $refuri=$ENV{'httpref.'.$orguri};
2907: unless ($refuri) {
2908: foreach (keys %ENV) {
2909: if ($_=~/^httpref\..*\*/) {
2910: my $pattern=$_;
2911: $pattern=~s/^httpref\.\/res\///;
2912: $pattern=~s/\*/\[\^\/\]\+/g;
2913: $pattern=~s/\//\\\//g;
2914: if ($orguri=~/$pattern/) {
2915: $refuri=$ENV{$_};
2916: }
2917: }
2918: }
2919: }
2920:
2921: if ($refuri) {
2922: $refuri=&declutter($refuri);
2923: my ($match,$cond)=&is_on_map($refuri);
2924: if ($match) {
2925: my $refstatecond=$cond;
2926: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2927: =~/\Q$priv\E\&([^\:]*)/) {
2928: $thisallowed.=$1;
2929: $uri=$refuri;
2930: $statecond=$refstatecond;
2931: }
2932: }
2933: }
2934: }
2935: }
2936:
2937: #
2938: # Gathered now: all privileges that could apply, and condition number
2939: #
2940: #
2941: # Full or no access?
2942: #
2943:
2944: if ($thisallowed=~/F/) {
2945: return 'F';
2946: }
2947:
2948: unless ($thisallowed) {
2949: return '';
2950: }
2951:
2952: # Restrictions exist, deal with them
2953: #
2954: # C:according to course preferences
2955: # R:according to resource settings
2956: # L:unless locked
2957: # X:according to user session state
2958: #
2959:
2960: # Possibly locked functionality, check all courses
2961: # Locks might take effect only after 10 minutes cache expiration for other
2962: # courses, and 2 minutes for current course
2963:
2964: my $envkey;
2965: if ($thisallowed=~/L/) {
2966: foreach $envkey (keys %ENV) {
2967: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2968: my $courseid=$2;
2969: my $roleid=$1.'.'.$2;
2970: $courseid=~s/^\///;
2971: my $expiretime=600;
2972: if ($ENV{'request.role'} eq $roleid) {
2973: $expiretime=120;
2974: }
2975: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2976: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2977: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2978: &coursedescription($courseid);
2979: }
2980: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
2981: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2982: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2983: &log($ENV{'user.domain'},$ENV{'user.name'},
2984: $ENV{'user.home'},
2985: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2986: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2987: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2988: return '';
2989: }
2990: }
2991: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
2992: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2993: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2994: &log($ENV{'user.domain'},$ENV{'user.name'},
2995: $ENV{'user.home'},
2996: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2997: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2998: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2999: return '';
3000: }
3001: }
3002: }
3003: }
3004: }
3005:
3006: #
3007: # Rest of the restrictions depend on selected course
3008: #
3009:
3010: unless ($ENV{'request.course.id'}) {
3011: return '1';
3012: }
3013:
3014: #
3015: # Now user is definitely in a course
3016: #
3017:
3018:
3019: # Course preferences
3020:
3021: if ($thisallowed=~/C/) {
3022: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
3023: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
3024: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
3025: =~/\Q$rolecode\E/) {
3026: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
3027: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3028: $ENV{'request.course.id'});
3029: return '';
3030: }
3031:
3032: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
3033: =~/\Q$unamedom\E/) {
3034: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
3035: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3036: $ENV{'request.course.id'});
3037: return '';
3038: }
3039: }
3040:
3041: # Resource preferences
3042:
3043: if ($thisallowed=~/R/) {
3044: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
3045: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3046: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
3047: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3048: return '';
3049: }
3050: }
3051:
3052: # Restricted by state or randomout?
3053:
3054: if ($thisallowed=~/X/) {
3055: if ($ENV{'acc.randomout'}) {
3056: my $symb=&symbread($uri,1);
3057: if (($symb) && ($ENV{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3058: return '';
3059: }
3060: }
3061: if (!defined($ENV{'user.state.'.$ENV{'request.course.id'}})) {
3062: &Apache::lonuserstate::evalstate();
3063: }
3064: if (&condval($statecond)) {
3065: return '2';
3066: } else {
3067: return '';
3068: }
3069: }
3070:
3071: return 'F';
3072: }
3073:
3074: # --------------------------------------------------- Is a resource on the map?
3075:
3076: sub is_on_map {
3077: my $uri=&declutter(shift);
3078: $uri=~s/\.\d+\.(\w+)$/\.$1/;
3079: my @uriparts=split(/\//,$uri);
3080: my $filename=$uriparts[$#uriparts];
3081: my $pathname=$uri;
3082: $pathname=~s|/\Q$filename\E$||;
3083: $pathname=~s/^adm\/wrapper\///;
3084: #Trying to find the conditional for the file
3085: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
3086: /\&\Q$filename\E\:([\d\|]+)\&/);
3087: if ($match) {
3088: return (1,$1);
3089: } else {
3090: return (0,0);
3091: }
3092: }
3093:
3094: # --------------------------------------------------------- Get symb from alias
3095:
3096: sub get_symb_from_alias {
3097: my $symb=shift;
3098: my ($map,$resid,$url)=&decode_symb($symb);
3099: # Already is a symb
3100: if ($url) { return $symb; }
3101: # Must be an alias
3102: my $aliassymb='';
3103: my %bighash;
3104: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3105: &GDBM_READER(),0640)) {
3106: my $rid=$bighash{'mapalias_'.$symb};
3107: if ($rid) {
3108: my ($mapid,$resid)=split(/\./,$rid);
3109: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3110: $resid,$bighash{'src_'.$rid});
3111: }
3112: untie %bighash;
3113: }
3114: return $aliassymb;
3115: }
3116:
3117: # ----------------------------------------------------------------- Define Role
3118:
3119: sub definerole {
3120: if (allowed('mcr','/')) {
3121: my ($rolename,$sysrole,$domrole,$courole)=@_;
3122: foreach (split(':',$sysrole)) {
3123: my ($crole,$cqual)=split(/\&/,$_);
3124: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3125: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3126: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3127: return "refused:s:$crole&$cqual";
3128: }
3129: }
3130: }
3131: foreach (split(':',$domrole)) {
3132: my ($crole,$cqual)=split(/\&/,$_);
3133: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3134: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3135: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3136: return "refused:d:$crole&$cqual";
3137: }
3138: }
3139: }
3140: foreach (split(':',$courole)) {
3141: my ($crole,$cqual)=split(/\&/,$_);
3142: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3143: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3144: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3145: return "refused:c:$crole&$cqual";
3146: }
3147: }
3148: }
3149: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3150: "$ENV{'user.domain'}:$ENV{'user.name'}:".
3151: "rolesdef_$rolename=".
3152: escape($sysrole.'_'.$domrole.'_'.$courole);
3153: return reply($command,$ENV{'user.home'});
3154: } else {
3155: return 'refused';
3156: }
3157: }
3158:
3159: # ---------------- Make a metadata query against the network of library servers
3160:
3161: sub metadata_query {
3162: my ($query,$custom,$customshow,$server_array)=@_;
3163: my %rhash;
3164: my @server_list = (defined($server_array) ? @$server_array
3165: : keys(%libserv) );
3166: for my $server (@server_list) {
3167: unless ($custom or $customshow) {
3168: my $reply=&reply("querysend:".&escape($query),$server);
3169: $rhash{$server}=$reply;
3170: }
3171: else {
3172: my $reply=&reply("querysend:".&escape($query).':'.
3173: &escape($custom).':'.&escape($customshow),
3174: $server);
3175: $rhash{$server}=$reply;
3176: }
3177: }
3178: return \%rhash;
3179: }
3180:
3181: # ----------------------------------------- Send log queries and wait for reply
3182:
3183: sub log_query {
3184: my ($uname,$udom,$query,%filters)=@_;
3185: my $uhome=&homeserver($uname,$udom);
3186: if ($uhome eq 'no_host') { return 'error: no_host'; }
3187: my $uhost=$hostname{$uhome};
3188: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3189: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3190: $uhome);
3191: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3192: return get_query_reply($queryid);
3193: }
3194:
3195: # ------- Request retrieval of institutional classlists for course(s)
3196:
3197: sub fetch_enrollment_query {
3198: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3199: my $homeserver;
3200: my $maxtries = 1;
3201: if ($context eq 'automated') {
3202: $homeserver = $perlvar{'lonHostID'};
3203: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3204: } else {
3205: $homeserver = &homeserver($cnum,$dom);
3206: }
3207: my $host=$hostname{$homeserver};
3208: my $cmd = '';
3209: foreach (keys %{$affiliatesref}) {
3210: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3211: }
3212: $cmd =~ s/%%$//;
3213: $cmd = &escape($cmd);
3214: my $query = 'fetchenrollment';
3215: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$ENV{'user.name'}.':'.$cmd,$homeserver);
3216: unless ($queryid=~/^\Q$host\E\_/) {
3217: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3218: return 'error: '.$queryid;
3219: }
3220: my $reply = &get_query_reply($queryid);
3221: my $tries = 1;
3222: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3223: $reply = &get_query_reply($queryid);
3224: $tries ++;
3225: }
3226: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3227: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$ENV{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3228: } else {
3229: my @responses = split/:/,$reply;
3230: if ($homeserver eq $perlvar{'lonHostID'}) {
3231: foreach (@responses) {
3232: my ($key,$value) = split/=/,$_;
3233: $$replyref{$key} = $value;
3234: }
3235: } else {
3236: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3237: foreach (@responses) {
3238: my ($key,$value) = split/=/,$_;
3239: $$replyref{$key} = $value;
3240: if ($value > 0) {
3241: foreach (@{$$affiliatesref{$key}}) {
3242: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3243: my $destname = $pathname.'/'.$filename;
3244: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3245: if ($xml_classlist =~ /^error/) {
3246: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3247: } else {
3248: if ( open(FILE,">$destname") ) {
3249: print FILE &unescape($xml_classlist);
3250: close(FILE);
3251: } else {
3252: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3253: }
3254: }
3255: }
3256: }
3257: }
3258: }
3259: return 'ok';
3260: }
3261: return 'error';
3262: }
3263:
3264: sub get_query_reply {
3265: my $queryid=shift;
3266: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3267: my $reply='';
3268: for (1..100) {
3269: sleep 2;
3270: if (-e $replyfile.'.end') {
3271: if (open(my $fh,$replyfile)) {
3272: $reply.=<$fh>;
3273: close($fh);
3274: } else { return 'error: reply_file_error'; }
3275: return &unescape($reply);
3276: }
3277: }
3278: return 'timeout:'.$queryid;
3279: }
3280:
3281: sub courselog_query {
3282: #
3283: # possible filters:
3284: # url: url or symb
3285: # username
3286: # domain
3287: # action: view, submit, grade
3288: # start: timestamp
3289: # end: timestamp
3290: #
3291: my (%filters)=@_;
3292: unless ($ENV{'request.course.id'}) { return 'no_course'; }
3293: if ($filters{'url'}) {
3294: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3295: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3296: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3297: }
3298: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
3299: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
3300: return &log_query($cname,$cdom,'courselog',%filters);
3301: }
3302:
3303: sub userlog_query {
3304: my ($uname,$udom,%filters)=@_;
3305: return &log_query($uname,$udom,'userlog',%filters);
3306: }
3307:
3308: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3309:
3310: sub auto_run {
3311: my ($cnum,$cdom) = @_;
3312: my $homeserver = &homeserver($cnum,$cdom);
3313: my $response = &reply('autorun:'.$cdom,$homeserver);
3314: return $response;
3315: }
3316:
3317: sub auto_get_sections {
3318: my ($cnum,$cdom,$inst_coursecode) = @_;
3319: my $homeserver = &homeserver($cnum,$cdom);
3320: my @secs = ();
3321: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3322: unless ($response eq 'refused') {
3323: @secs = split/:/,$response;
3324: }
3325: return @secs;
3326: }
3327:
3328: sub auto_new_course {
3329: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3330: my $homeserver = &homeserver($cnum,$cdom);
3331: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3332: return $response;
3333: }
3334:
3335: sub auto_validate_courseID {
3336: my ($cnum,$cdom,$inst_course_id) = @_;
3337: my $homeserver = &homeserver($cnum,$cdom);
3338: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3339: return $response;
3340: }
3341:
3342: sub auto_create_password {
3343: my ($cnum,$cdom,$authparam) = @_;
3344: my $homeserver = &homeserver($cnum,$cdom);
3345: my $create_passwd = 0;
3346: my $authchk = '';
3347: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3348: if ($response eq 'refused') {
3349: $authchk = 'refused';
3350: } else {
3351: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3352: }
3353: return ($authparam,$create_passwd,$authchk);
3354: }
3355:
3356: sub auto_instcode_format {
3357: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3358: my $courses = '';
3359: my $homeserver;
3360: if ($caller eq 'global') {
3361: $homeserver = $perlvar{'lonHostID'};
3362: } else {
3363: $homeserver = &homeserver($caller,$codedom);
3364: }
3365: my $host=$hostname{$homeserver};
3366: foreach (keys %{$instcodes}) {
3367: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3368: }
3369: chop($courses);
3370: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3371: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3372: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3373: %{$codes} = &str2hash($codes_str);
3374: @{$codetitles} = &str2array($codetitles_str);
3375: %{$cat_titles} = &str2hash($cat_titles_str);
3376: %{$cat_order} = &str2hash($cat_order_str);
3377: return 'ok';
3378: }
3379: return $response;
3380: }
3381:
3382: # ------------------------------------------------------------------ Plain Text
3383:
3384: sub plaintext {
3385: my $short=shift;
3386: return &mt($prp{$short});
3387: }
3388:
3389: # ----------------------------------------------------------------- Assign Role
3390:
3391: sub assignrole {
3392: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3393: my $mrole;
3394: if ($role =~ /^cr\//) {
3395: my $cwosec=$url;
3396: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3397: unless (&allowed('ccr',$cwosec)) {
3398: &logthis('Refused custom assignrole: '.
3399: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3400: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3401: return 'refused';
3402: }
3403: $mrole='cr';
3404: } else {
3405: my $cwosec=$url;
3406: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3407: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3408: &logthis('Refused assignrole: '.
3409: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3410: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3411: return 'refused';
3412: }
3413: $mrole=$role;
3414: }
3415: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3416: "$udom:$uname:$url".'_'."$mrole=$role";
3417: if ($end) { $command.='_'.$end; }
3418: if ($start) {
3419: if ($end) {
3420: $command.='_'.$start;
3421: } else {
3422: $command.='_0_'.$start;
3423: }
3424: }
3425: # actually delete
3426: if ($deleteflag) {
3427: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3428: # modify command to delete the role
3429: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
3430: "$udom:$uname:$url".'_'."$mrole";
3431: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
3432: # set start and finish to negative values for userrolelog
3433: $start=-1;
3434: $end=-1;
3435: }
3436: }
3437: # send command
3438: my $answer=&reply($command,&homeserver($uname,$udom));
3439: # log new user role if status is ok
3440: if ($answer eq 'ok') {
3441: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
3442: }
3443: return $answer;
3444: }
3445:
3446: # -------------------------------------------------- Modify user authentication
3447: # Overrides without validation
3448:
3449: sub modifyuserauth {
3450: my ($udom,$uname,$umode,$upass)=@_;
3451: my $uhome=&homeserver($uname,$udom);
3452: unless (&allowed('mau',$udom)) { return 'refused'; }
3453: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3454: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3455: ' in domain '.$ENV{'request.role.domain'});
3456: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3457: &escape($upass),$uhome);
3458: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
3459: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3460: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3461: &log($udom,,$uname,$uhome,
3462: 'Authentication changed by '.$ENV{'user.domain'}.', '.
3463: $ENV{'user.name'}.', '.$umode.
3464: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3465: unless ($reply eq 'ok') {
3466: &logthis('Authentication mode error: '.$reply);
3467: return 'error: '.$reply;
3468: }
3469: return 'ok';
3470: }
3471:
3472: # --------------------------------------------------------------- Modify a user
3473:
3474: sub modifyuser {
3475: my ($udom, $uname, $uid,
3476: $umode, $upass, $first,
3477: $middle, $last, $gene,
3478: $forceid, $desiredhome, $email)=@_;
3479: $udom=~s/\W//g;
3480: $uname=~s/\W//g;
3481: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3482: $umode.', '.$first.', '.$middle.', '.
3483: $last.', '.$gene.'(forceid: '.$forceid.')'.
3484: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3485: ' desiredhome not specified').
3486: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3487: ' in domain '.$ENV{'request.role.domain'});
3488: my $uhome=&homeserver($uname,$udom,'true');
3489: # ----------------------------------------------------------------- Create User
3490: if (($uhome eq 'no_host') &&
3491: (($umode && $upass) || ($umode eq 'localauth'))) {
3492: my $unhome='';
3493: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3494: $unhome = $desiredhome;
3495: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
3496: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
3497: } else { # load balancing routine for determining $unhome
3498: my $tryserver;
3499: my $loadm=10000000;
3500: foreach $tryserver (keys %libserv) {
3501: if ($hostdom{$tryserver} eq $udom) {
3502: my $answer=reply('load',$tryserver);
3503: if (($answer=~/\d+/) && ($answer<$loadm)) {
3504: $loadm=$answer;
3505: $unhome=$tryserver;
3506: }
3507: }
3508: }
3509: }
3510: if (($unhome eq '') || ($unhome eq 'no_host')) {
3511: return 'error: unable to find a home server for '.$uname.
3512: ' in domain '.$udom;
3513: }
3514: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3515: &escape($upass),$unhome);
3516: unless ($reply eq 'ok') {
3517: return 'error: '.$reply;
3518: }
3519: $uhome=&homeserver($uname,$udom,'true');
3520: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3521: return 'error: unable verify users home machine.';
3522: }
3523: } # End of creation of new user
3524: # ---------------------------------------------------------------------- Add ID
3525: if ($uid) {
3526: $uid=~tr/A-Z/a-z/;
3527: my %uidhash=&idrget($udom,$uname);
3528: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3529: && (!$forceid)) {
3530: unless ($uid eq $uidhash{$uname}) {
3531: return 'error: user id "'.$uid.'" does not match '.
3532: 'current user id "'.$uidhash{$uname}.'".';
3533: }
3534: } else {
3535: &idput($udom,($uname => $uid));
3536: }
3537: }
3538: # -------------------------------------------------------------- Add names, etc
3539: my @tmp=&get('environment',
3540: ['firstname','middlename','lastname','generation'],
3541: $udom,$uname);
3542: my %names;
3543: if ($tmp[0] =~ m/^error:.*/) {
3544: %names=();
3545: } else {
3546: %names = @tmp;
3547: }
3548: #
3549: # Make sure to not trash student environment if instructor does not bother
3550: # to supply name and email information
3551: #
3552: if ($first) { $names{'firstname'} = $first; }
3553: if (defined($middle)) { $names{'middlename'} = $middle; }
3554: if ($last) { $names{'lastname'} = $last; }
3555: if (defined($gene)) { $names{'generation'} = $gene; }
3556: if ($email) { $names{'notification'} = $email;
3557: $names{'critnotification'} = $email; }
3558:
3559: my $reply = &put('environment', \%names, $udom,$uname);
3560: if ($reply ne 'ok') { return 'error: '.$reply; }
3561: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
3562: $umode.', '.$first.', '.$middle.', '.
3563: $last.', '.$gene.' by '.
3564: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3565: return 'ok';
3566: }
3567:
3568: # -------------------------------------------------------------- Modify student
3569:
3570: sub modifystudent {
3571: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3572: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
3573: if (!$cid) {
3574: unless ($cid=$ENV{'request.course.id'}) {
3575: return 'not_in_class';
3576: }
3577: }
3578: # --------------------------------------------------------------- Make the user
3579: my $reply=&modifyuser
3580: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
3581: $desiredhome,$email);
3582: unless ($reply eq 'ok') { return $reply; }
3583: # This will cause &modify_student_enrollment to get the uid from the
3584: # students environment
3585: $uid = undef if (!$forceid);
3586: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
3587: $gene,$usec,$end,$start,$type,$locktype,$cid);
3588: return $reply;
3589: }
3590:
3591: sub modify_student_enrollment {
3592: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
3593: my ($cdom,$cnum,$chome);
3594: if (!$cid) {
3595: unless ($cid=$ENV{'request.course.id'}) {
3596: return 'not_in_class';
3597: }
3598: $cdom=$ENV{'course.'.$cid.'.domain'};
3599: $cnum=$ENV{'course.'.$cid.'.num'};
3600: } else {
3601: ($cdom,$cnum)=split(/_/,$cid);
3602: }
3603: $chome=$ENV{'course.'.$cid.'.home'};
3604: if (!$chome) {
3605: $chome=&homeserver($cnum,$cdom);
3606: }
3607: if (!$chome) { return 'unknown_course'; }
3608: # Make sure the user exists
3609: my $uhome=&homeserver($uname,$udom);
3610: if (($uhome eq '') || ($uhome eq 'no_host')) {
3611: return 'error: no such user';
3612: }
3613: # Get student data if we were not given enough information
3614: if (!defined($first) || $first eq '' ||
3615: !defined($last) || $last eq '' ||
3616: !defined($uid) || $uid eq '' ||
3617: !defined($middle) || $middle eq '' ||
3618: !defined($gene) || $gene eq '') {
3619: # They did not supply us with enough data to enroll the student, so
3620: # we need to pick up more information.
3621: my %tmp = &get('environment',
3622: ['firstname','middlename','lastname', 'generation','id']
3623: ,$udom,$uname);
3624:
3625: #foreach (keys(%tmp)) {
3626: # &logthis("key $_ = ".$tmp{$_});
3627: #}
3628: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3629: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3630: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3631: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3632: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3633: }
3634: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
3635: $first,$middle);
3636: my $reply=cput('classlist',
3637: {"$uname:$udom" =>
3638: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
3639: $cdom,$cnum);
3640: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3641: return 'error: '.$reply;
3642: }
3643: # Add student role to user
3644: my $uurl='/'.$cid;
3645: $uurl=~s/\_/\//g;
3646: if ($usec) {
3647: $uurl.='/'.$usec;
3648: }
3649: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3650: }
3651:
3652: # ------------------------------------------------- Write to course preferences
3653:
3654: sub writecoursepref {
3655: my ($courseid,%prefs)=@_;
3656: $courseid=~s/^\///;
3657: $courseid=~s/\_/\//g;
3658: my ($cdomain,$cnum)=split(/\//,$courseid);
3659: my $chome=homeserver($cnum,$cdomain);
3660: if (($chome eq '') || ($chome eq 'no_host')) {
3661: return 'error: no such course';
3662: }
3663: my $cstring='';
3664: foreach (keys %prefs) {
3665: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3666: }
3667: $cstring=~s/\&$//;
3668: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3669: }
3670:
3671: # ---------------------------------------------------------- Make/modify course
3672:
3673: sub createcourse {
3674: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code)=@_;
3675: $url=&declutter($url);
3676: my $cid='';
3677: unless (&allowed('ccc',$udom)) {
3678: return 'refused';
3679: }
3680: # ------------------------------------------------------------------- Create ID
3681: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3682: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3683: # ----------------------------------------------- Make sure that does not exist
3684: my $uhome=&homeserver($uname,$udom,'true');
3685: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3686: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3687: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3688: $uhome=&homeserver($uname,$udom,'true');
3689: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3690: return 'error: unable to generate unique course-ID';
3691: }
3692: }
3693: # ------------------------------------------------ Check supplied server name
3694: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3695: if (! exists($libserv{$course_server})) {
3696: return 'error:bad server name '.$course_server;
3697: }
3698: # ------------------------------------------------------------- Make the course
3699: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3700: $course_server);
3701: unless ($reply eq 'ok') { return 'error: '.$reply; }
3702: $uhome=&homeserver($uname,$udom,'true');
3703: if (($uhome eq '') || ($uhome eq 'no_host')) {
3704: return 'error: no such course';
3705: }
3706: # ----------------------------------------------------------------- Course made
3707: # log existence
3708: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
3709: '='.&escape($inst_code),$uhome);
3710: &flushcourselogs();
3711: # set toplevel url
3712: my $topurl=$url;
3713: unless ($nonstandard) {
3714: # ------------------------------------------ For standard courses, make top url
3715: my $mapurl=&clutter($url);
3716: if ($mapurl eq '/res/') { $mapurl=''; }
3717: $ENV{'form.initmap'}=(<<ENDINITMAP);
3718: <map>
3719: <resource id="1" type="start"></resource>
3720: <resource id="2" src="$mapurl"></resource>
3721: <resource id="3" type="finish"></resource>
3722: <link index="1" from="1" to="2"></link>
3723: <link index="2" from="2" to="3"></link>
3724: </map>
3725: ENDINITMAP
3726: $topurl=&declutter(
3727: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3728: );
3729: }
3730: # ----------------------------------------------------------- Write preferences
3731: &writecoursepref($udom.'_'.$uname,
3732: ('description' => $description,
3733: 'url' => $topurl));
3734: return '/'.$udom.'/'.$uname;
3735: }
3736:
3737: # ---------------------------------------------------------- Assign Custom Role
3738:
3739: sub assigncustomrole {
3740: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3741: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3742: $end,$start,$deleteflag);
3743: }
3744:
3745: # ----------------------------------------------------------------- Revoke Role
3746:
3747: sub revokerole {
3748: my ($udom,$uname,$url,$role,$deleteflag)=@_;
3749: my $now=time;
3750: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
3751: }
3752:
3753: # ---------------------------------------------------------- Revoke Custom Role
3754:
3755: sub revokecustomrole {
3756: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
3757: my $now=time;
3758: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3759: $deleteflag);
3760: }
3761:
3762: # ------------------------------------------------------------ Disk usage
3763: sub diskusage {
3764: my ($udom,$uname,$directoryRoot)=@_;
3765: $directoryRoot =~ s/\/$//;
3766: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
3767: return $listing;
3768: }
3769:
3770:
3771: # ------------------------------------------------------------ Directory lister
3772:
3773: sub dirlist {
3774: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3775:
3776: $uri=~s/^\///;
3777: $uri=~s/\/$//;
3778: my ($udom, $uname);
3779: (undef,$udom,$uname)=split(/\//,$uri);
3780: if(defined($userdomain)) {
3781: $udom = $userdomain;
3782: }
3783: if(defined($username)) {
3784: $uname = $username;
3785: }
3786:
3787: my $dirRoot = $perlvar{'lonDocRoot'};
3788: if(defined($alternateDirectoryRoot)) {
3789: $dirRoot = $alternateDirectoryRoot;
3790: $dirRoot =~ s/\/$//;
3791: }
3792:
3793: if($udom) {
3794: if($uname) {
3795: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
3796: homeserver($uname,$udom));
3797: return split(/:/,$listing);
3798: } elsif(!defined($alternateDirectoryRoot)) {
3799: my $tryserver;
3800: my %allusers=();
3801: foreach $tryserver (keys %libserv) {
3802: if($hostdom{$tryserver} eq $udom) {
3803: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3804: $udom, $tryserver);
3805: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
3806: && ($listing ne 'con_lost')) {
3807: foreach (split(/:/,$listing)) {
3808: my ($entry,@stat)=split(/&/,$_);
3809: $allusers{$entry}=1;
3810: }
3811: }
3812: }
3813: }
3814: my $alluserstr='';
3815: foreach (sort keys %allusers) {
3816: $alluserstr.=$_.'&user:';
3817: }
3818: $alluserstr=~s/:$//;
3819: return split(/:/,$alluserstr);
3820: } else {
3821: my @emptyResults = ();
3822: push(@emptyResults, 'missing user name');
3823: return split(':',@emptyResults);
3824: }
3825: } elsif(!defined($alternateDirectoryRoot)) {
3826: my $tryserver;
3827: my %alldom=();
3828: foreach $tryserver (keys %libserv) {
3829: $alldom{$hostdom{$tryserver}}=1;
3830: }
3831: my $alldomstr='';
3832: foreach (sort keys %alldom) {
3833: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
3834: }
3835: $alldomstr=~s/:$//;
3836: return split(/:/,$alldomstr);
3837: } else {
3838: my @emptyResults = ();
3839: push(@emptyResults, 'missing domain');
3840: return split(':',@emptyResults);
3841: }
3842: }
3843:
3844: # --------------------------------------------- GetFileTimestamp
3845: # This function utilizes dirlist and returns the date stamp for
3846: # when it was last modified. It will also return an error of -1
3847: # if an error occurs
3848:
3849: ##
3850: ## FIXME: This subroutine assumes its caller knows something about the
3851: ## directory structure of the home server for the student ($root).
3852: ## Not a good assumption to make. Since this is for looking up files
3853: ## in user directories, the full path should be constructed by lond, not
3854: ## whatever machine we request data from.
3855: ##
3856: sub GetFileTimestamp {
3857: my ($studentDomain,$studentName,$filename,$root)=@_;
3858: $studentDomain=~s/\W//g;
3859: $studentName=~s/\W//g;
3860: my $subdir=$studentName.'__';
3861: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3862: my $proname="$studentDomain/$subdir/$studentName";
3863: $proname .= '/'.$filename;
3864: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
3865: $studentName, $root);
3866: my @stats = split('&', $fileStat);
3867: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
3868: # @stats contains first the filename, then the stat output
3869: return $stats[10]; # so this is 10 instead of 9.
3870: } else {
3871: return -1;
3872: }
3873: }
3874:
3875: # -------------------------------------------------------- Value of a Condition
3876:
3877: sub directcondval {
3878: my $number=shift;
3879: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
3880: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
3881: } else {
3882: return 2;
3883: }
3884: }
3885:
3886: sub condval {
3887: my $condidx=shift;
3888: my $result=0;
3889: my $allpathcond='';
3890: foreach (split(/\|/,$condidx)) {
3891: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
3892: $allpathcond.=
3893: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
3894: }
3895: }
3896: $allpathcond=~s/\|$//;
3897: if ($ENV{'request.course.id'}) {
3898: if ($allpathcond) {
3899: my $operand='|';
3900: my @stack;
3901: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
3902: if ($_ eq '(') {
3903: push @stack,($operand,$result)
3904: } elsif ($_ eq ')') {
3905: my $before=pop @stack;
3906: if (pop @stack eq '&') {
3907: $result=$result>$before?$before:$result;
3908: } else {
3909: $result=$result>$before?$result:$before;
3910: }
3911: } elsif (($_ eq '&') || ($_ eq '|')) {
3912: $operand=$_;
3913: } else {
3914: my $new=directcondval($_);
3915: if ($operand eq '&') {
3916: $result=$result>$new?$new:$result;
3917: } else {
3918: $result=$result>$new?$result:$new;
3919: }
3920: }
3921: }
3922: }
3923: }
3924: return $result;
3925: }
3926:
3927: # ---------------------------------------------------- Devalidate courseresdata
3928:
3929: sub devalidatecourseresdata {
3930: my ($coursenum,$coursedomain)=@_;
3931: my $hashid=$coursenum.':'.$coursedomain;
3932: &devalidate_cache(\%courseresdatacache,$hashid,'courseres');
3933: }
3934:
3935: # --------------------------------------------------- Course Resourcedata Query
3936:
3937: sub courseresdata {
3938: my ($coursenum,$coursedomain,@which)=@_;
3939: my $coursehom=&homeserver($coursenum,$coursedomain);
3940: my $hashid=$coursenum.':'.$coursedomain;
3941: my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid,'courseres');
3942: unless (defined($cached)) {
3943: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
3944: $result=\%dumpreply;
3945: my ($tmp) = keys(%dumpreply);
3946: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
3947: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
3948: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3949: return $tmp;
3950: } elsif ($tmp =~ /^(error)/) {
3951: $result=undef;
3952: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
3953: }
3954: }
3955: foreach my $item (@which) {
3956: if (defined($result->{$item})) {
3957: return $result->{$item};
3958: }
3959: }
3960: return undef;
3961: }
3962:
3963: #
3964: # EXT resource caching routines
3965: #
3966:
3967: sub clear_EXT_cache_status {
3968: &delenv('cache.EXT.');
3969: }
3970:
3971: sub EXT_cache_status {
3972: my ($target_domain,$target_user) = @_;
3973: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3974: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
3975: # We know already the user has no data
3976: return 1;
3977: } else {
3978: return 0;
3979: }
3980: }
3981:
3982: sub EXT_cache_set {
3983: my ($target_domain,$target_user) = @_;
3984: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3985: &appenv($cachename => time);
3986: }
3987:
3988: # --------------------------------------------------------- Value of a Variable
3989: sub EXT {
3990: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
3991:
3992: unless ($varname) { return ''; }
3993: #get real user name/domain, courseid and symb
3994: my $courseid;
3995: my $publicuser;
3996: if ($symbparm) {
3997: $symbparm=&get_symb_from_alias($symbparm);
3998: }
3999: if (!($uname && $udom)) {
4000: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
4001: &Apache::lonxml::whichuser($symbparm);
4002: if (!$symbparm) { $symbparm=$cursymb; }
4003: } else {
4004: $courseid=$ENV{'request.course.id'};
4005: }
4006: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
4007: my $rest;
4008: if (defined($therest[0])) {
4009: $rest=join('.',@therest);
4010: } else {
4011: $rest='';
4012: }
4013:
4014: my $qualifierrest=$qualifier;
4015: if ($rest) { $qualifierrest.='.'.$rest; }
4016: my $spacequalifierrest=$space;
4017: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
4018: if ($realm eq 'user') {
4019: # --------------------------------------------------------------- user.resource
4020: if ($space eq 'resource') {
4021: if (defined($Apache::lonhomework::parsing_a_problem)) {
4022: return $Apache::lonhomework::history{$qualifierrest};
4023: } else {
4024: my %restored;
4025: if ($publicuser || $ENV{'request.state'} eq 'construct') {
4026: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
4027: } else {
4028: %restored=&restore($symbparm,$courseid,$udom,$uname);
4029: }
4030: return $restored{$qualifierrest};
4031: }
4032: # ----------------------------------------------------------------- user.access
4033: } elsif ($space eq 'access') {
4034: # FIXME - not supporting calls for a specific user
4035: return &allowed($qualifier,$rest);
4036: # ------------------------------------------ user.preferences, user.environment
4037: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
4038: if (($uname eq $ENV{'user.name'}) &&
4039: ($udom eq $ENV{'user.domain'})) {
4040: return $ENV{join('.',('environment',$qualifierrest))};
4041: } else {
4042: my %returnhash;
4043: if (!$publicuser) {
4044: %returnhash=&userenvironment($udom,$uname,
4045: $qualifierrest);
4046: }
4047: return $returnhash{$qualifierrest};
4048: }
4049: # ----------------------------------------------------------------- user.course
4050: } elsif ($space eq 'course') {
4051: # FIXME - not supporting calls for a specific user
4052: return $ENV{join('.',('request.course',$qualifier))};
4053: # ------------------------------------------------------------------- user.role
4054: } elsif ($space eq 'role') {
4055: # FIXME - not supporting calls for a specific user
4056: my ($role,$where)=split(/\./,$ENV{'request.role'});
4057: if ($qualifier eq 'value') {
4058: return $role;
4059: } elsif ($qualifier eq 'extent') {
4060: return $where;
4061: }
4062: # ----------------------------------------------------------------- user.domain
4063: } elsif ($space eq 'domain') {
4064: return $udom;
4065: # ------------------------------------------------------------------- user.name
4066: } elsif ($space eq 'name') {
4067: return $uname;
4068: # ---------------------------------------------------- Any other user namespace
4069: } else {
4070: my %reply;
4071: if (!$publicuser) {
4072: %reply=&get($space,[$qualifierrest],$udom,$uname);
4073: }
4074: return $reply{$qualifierrest};
4075: }
4076: } elsif ($realm eq 'query') {
4077: # ---------------------------------------------- pull stuff out of query string
4078: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
4079: [$spacequalifierrest]);
4080: return $ENV{'form.'.$spacequalifierrest};
4081: } elsif ($realm eq 'request') {
4082: # ------------------------------------------------------------- request.browser
4083: if ($space eq 'browser') {
4084: if ($qualifier eq 'textremote') {
4085: if (&mt('textual_remote_display') eq 'on') {
4086: return 1;
4087: } else {
4088: return 0;
4089: }
4090: } else {
4091: return $ENV{'browser.'.$qualifier};
4092: }
4093: # ------------------------------------------------------------ request.filename
4094: } else {
4095: return $ENV{'request.'.$spacequalifierrest};
4096: }
4097: } elsif ($realm eq 'course') {
4098: # ---------------------------------------------------------- course.description
4099: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
4100: } elsif ($realm eq 'resource') {
4101:
4102: my $section;
4103: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
4104: if (!$symbparm) { $symbparm=&symbread(); }
4105: }
4106: if ($symbparm && defined($courseid) &&
4107: $courseid eq $ENV{'request.course.id'}) {
4108:
4109: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
4110:
4111: # ----------------------------------------------------- Cascading lookup scheme
4112: my $symbp=$symbparm;
4113: my $mapp=(&decode_symb($symbp))[0];
4114:
4115: my $symbparm=$symbp.'.'.$spacequalifierrest;
4116: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
4117:
4118: if (($ENV{'user.name'} eq $uname) &&
4119: ($ENV{'user.domain'} eq $udom)) {
4120: $section=$ENV{'request.course.sec'};
4121: } else {
4122: if (! defined($usection)) {
4123: $section=&getsection($udom,$uname,$courseid);
4124: } else {
4125: $section = $usection;
4126: }
4127: }
4128:
4129: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
4130: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
4131: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
4132:
4133: my $courselevel=$courseid.'.'.$spacequalifierrest;
4134: my $courselevelr=$courseid.'.'.$symbparm;
4135: my $courselevelm=$courseid.'.'.$mapparm;
4136:
4137: # ----------------------------------------------------------- first, check user
4138: #most student don\'t have any data set, check if there is some data
4139: if (! &EXT_cache_status($udom,$uname)) {
4140: my $hashid="$udom:$uname";
4141: my ($result,$cached)=&is_cached(\%userresdatacache,$hashid,
4142: 'userres');
4143: if (!defined($cached)) {
4144: my %resourcedata=&dump('resourcedata',$udom,$uname);
4145: $result=\%resourcedata;
4146: &do_cache(\%userresdatacache,$hashid,$result,'userres');
4147: }
4148: my ($tmp)=keys(%$result);
4149: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4150: if ($$result{$courselevelr}) {
4151: return $$result{$courselevelr}; }
4152: if ($$result{$courselevelm}) {
4153: return $$result{$courselevelm}; }
4154: if ($$result{$courselevel}) {
4155: return $$result{$courselevel}; }
4156: } else {
4157: #error 2 occurs when the .db doesn't exist
4158: if ($tmp!~/error: 2 /) {
4159: &logthis("<font color=blue>WARNING:".
4160: " Trying to get resource data for ".
4161: $uname." at ".$udom.": ".
4162: $tmp."</font>");
4163: } elsif ($tmp=~/error: 2 /) {
4164: &EXT_cache_set($udom,$uname);
4165: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4166: return $tmp;
4167: }
4168: }
4169: }
4170:
4171: # -------------------------------------------------------- second, check course
4172:
4173: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
4174: $ENV{'course.'.$courseid.'.domain'},
4175: ($seclevelr,$seclevelm,$seclevel,
4176: $courselevelr,$courselevelm,
4177: $courselevel));
4178: if (defined($coursereply)) { return $coursereply; }
4179:
4180: # ------------------------------------------------------ third, check map parms
4181: my %parmhash=();
4182: my $thisparm='';
4183: if (tie(%parmhash,'GDBM_File',
4184: $ENV{'request.course.fn'}.'_parms.db',
4185: &GDBM_READER(),0640)) {
4186: $thisparm=$parmhash{$symbparm};
4187: untie(%parmhash);
4188: }
4189: if ($thisparm) { return $thisparm; }
4190: }
4191: # --------------------------------------------- last, look in resource metadata
4192:
4193: $spacequalifierrest=~s/\./\_/;
4194: my $filename;
4195: if (!$symbparm) { $symbparm=&symbread(); }
4196: if ($symbparm) {
4197: $filename=(&decode_symb($symbparm))[2];
4198: } else {
4199: $filename=$ENV{'request.filename'};
4200: }
4201: my $metadata=&metadata($filename,$spacequalifierrest);
4202: if (defined($metadata)) { return $metadata; }
4203: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
4204: if (defined($metadata)) { return $metadata; }
4205:
4206: # ------------------------------------------------------------------ Cascade up
4207: unless ($space eq '0') {
4208: my @parts=split(/_/,$space);
4209: my $id=pop(@parts);
4210: my $part=join('_',@parts);
4211: if ($part eq '') { $part='0'; }
4212: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
4213: $symbparm,$udom,$uname,$section,1);
4214: if (defined($partgeneral)) { return $partgeneral; }
4215: }
4216: if ($recurse) { return undef; }
4217: my $pack_def=&packages_tab_default($filename,$varname);
4218: if (defined($pack_def)) { return $pack_def; }
4219:
4220: # ---------------------------------------------------- Any other user namespace
4221: } elsif ($realm eq 'environment') {
4222: # ----------------------------------------------------------------- environment
4223: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
4224: return $ENV{'environment.'.$spacequalifierrest};
4225: } else {
4226: my %returnhash=&userenvironment($udom,$uname,
4227: $spacequalifierrest);
4228: return $returnhash{$spacequalifierrest};
4229: }
4230: } elsif ($realm eq 'system') {
4231: # ----------------------------------------------------------------- system.time
4232: if ($space eq 'time') {
4233: return time;
4234: }
4235: }
4236: return '';
4237: }
4238:
4239: sub packages_tab_default {
4240: my ($uri,$varname)=@_;
4241: my (undef,$part,$name)=split(/\./,$varname);
4242: my $packages=&metadata($uri,'packages');
4243: foreach my $package (split(/,/,$packages)) {
4244: my ($pack_type,$pack_part)=split(/_/,$package,2);
4245: if (defined($packagetab{"$pack_type&$name&default"})) {
4246: return $packagetab{"$pack_type&$name&default"};
4247: }
4248: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
4249: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
4250: }
4251: }
4252: return undef;
4253: }
4254:
4255: sub add_prefix_and_part {
4256: my ($prefix,$part)=@_;
4257: my $keyroot;
4258: if (defined($prefix) && $prefix !~ /^__/) {
4259: # prefix that has a part already
4260: $keyroot=$prefix;
4261: } elsif (defined($prefix)) {
4262: # prefix that is missing a part
4263: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
4264: } else {
4265: # no prefix at all
4266: if (defined($part)) { $keyroot='_'.$part; }
4267: }
4268: return $keyroot;
4269: }
4270:
4271: # ---------------------------------------------------------------- Get metadata
4272:
4273: sub metadata {
4274: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
4275: $uri=&declutter($uri);
4276: # if it is a non metadata possible uri return quickly
4277: if (($uri eq '') ||
4278: (($uri =~ m|^/*adm/|) &&
4279: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
4280: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
4281: ($uri =~ m|home/[^/]+/public_html/|)) {
4282: return undef;
4283: }
4284: my $filename=$uri;
4285: $uri=~s/\.meta$//;
4286: #
4287: # Is the metadata already cached?
4288: # Look at timestamp of caching
4289: # Everything is cached by the main uri, libraries are never directly cached
4290: #
4291: if (!defined($liburi)) {
4292: my ($result,$cached)=&is_cached(\%metacache,$uri,'meta');
4293: if (defined($cached)) { return $result->{':'.$what}; }
4294: }
4295: {
4296: #
4297: # Is this a recursive call for a library?
4298: #
4299: if (! exists($metacache{$uri})) {
4300: $metacache{$uri}={};
4301: }
4302: if ($liburi) {
4303: $liburi=&declutter($liburi);
4304: $filename=$liburi;
4305: } else {
4306: &devalidate_cache(\%metacache,$uri,'meta');
4307: }
4308: my %metathesekeys=();
4309: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
4310: my $metastring;
4311: if ($uri !~ m|^uploaded/|) {
4312: my $file=&filelocation('',&clutter($filename));
4313: push(@{$metacache{$uri.'.file'}},$file);
4314: $metastring=&getfile($file);
4315: }
4316: my $parser=HTML::LCParser->new(\$metastring);
4317: my $token;
4318: undef %metathesekeys;
4319: while ($token=$parser->get_token) {
4320: if ($token->[0] eq 'S') {
4321: if (defined($token->[2]->{'package'})) {
4322: #
4323: # This is a package - get package info
4324: #
4325: my $package=$token->[2]->{'package'};
4326: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4327: if (defined($token->[2]->{'id'})) {
4328: $keyroot.='_'.$token->[2]->{'id'};
4329: }
4330: if ($metacache{$uri}->{':packages'}) {
4331: $metacache{$uri}->{':packages'}.=','.$package.$keyroot;
4332: } else {
4333: $metacache{$uri}->{':packages'}=$package.$keyroot;
4334: }
4335: foreach (keys %packagetab) {
4336: my $part=$keyroot;
4337: $part=~s/^\_//;
4338: if ($_=~/^\Q$package\E\&/ ||
4339: $_=~/^\Q$package\E_0\&/) {
4340: my ($pack,$name,$subp)=split(/\&/,$_);
4341: # ignore package.tab specified default values
4342: # here &package_tab_default() will fetch those
4343: if ($subp eq 'default') { next; }
4344: my $value=$packagetab{$_};
4345: my $unikey;
4346: if ($pack =~ /_0$/) {
4347: $unikey='parameter_0_'.$name;
4348: $part=0;
4349: } else {
4350: $unikey='parameter'.$keyroot.'_'.$name;
4351: }
4352: if ($subp eq 'display') {
4353: $value.=' [Part: '.$part.']';
4354: }
4355: $metacache{$uri}->{':'.$unikey.'.part'}=$part;
4356: $metathesekeys{$unikey}=1;
4357: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4358: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
4359: }
4360: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4361: $metacache{$uri}->{':'.$unikey}=
4362: $metacache{$uri}->{':'.$unikey.'.default'};
4363: }
4364: }
4365: }
4366: } else {
4367: #
4368: # This is not a package - some other kind of start tag
4369: #
4370: my $entry=$token->[1];
4371: my $unikey;
4372: if ($entry eq 'import') {
4373: $unikey='';
4374: } else {
4375: $unikey=$entry;
4376: }
4377: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4378:
4379: if (defined($token->[2]->{'id'})) {
4380: $unikey.='_'.$token->[2]->{'id'};
4381: }
4382:
4383: if ($entry eq 'import') {
4384: #
4385: # Importing a library here
4386: #
4387: if ($depthcount<20) {
4388: my $location=$parser->get_text('/import');
4389: my $dir=$filename;
4390: $dir=~s|[^/]*$||;
4391: $location=&filelocation($dir,$location);
4392: foreach (sort(split(/\,/,&metadata($uri,'keys',
4393: $location,$unikey,
4394: $depthcount+1)))) {
4395: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
4396: $metathesekeys{$_}=1;
4397: }
4398: }
4399: } else {
4400:
4401: if (defined($token->[2]->{'name'})) {
4402: $unikey.='_'.$token->[2]->{'name'};
4403: }
4404: $metathesekeys{$unikey}=1;
4405: foreach (@{$token->[3]}) {
4406: $metacache{$uri}->{':'.$unikey.'.'.$_}=$token->[2]->{$_};
4407: }
4408: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
4409: my $default=$metacache{$uri}->{':'.$unikey.'.default'};
4410: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
4411: # only ws inside the tag, and not in default, so use default
4412: # as value
4413: $metacache{$uri}->{':'.$unikey}=$default;
4414: } else {
4415: # either something interesting inside the tag or default
4416: # uninteresting
4417: $metacache{$uri}->{':'.$unikey}=$internaltext;
4418: }
4419: # end of not-a-package not-a-library import
4420: }
4421: # end of not-a-package start tag
4422: }
4423: # the next is the end of "start tag"
4424: }
4425: }
4426: my ($extension) = ($uri =~ /\.(\w+)$/);
4427: foreach my $key (sort(keys(%packagetab))) {
4428: #&logthis("extsion1 $extension $key !!");
4429: #no specific packages #how's our extension
4430: if ($key!~/^extension_\Q$extension\E&/) { next; }
4431: &metadata_create_package_def($uri,$key,'extension_'.$extension,
4432: \%metathesekeys);
4433: }
4434: if (!exists($metacache{$uri}->{':packages'})) {
4435: foreach my $key (sort(keys(%packagetab))) {
4436: #no specific packages well let's get default then
4437: if ($key!~/^default&/) { next; }
4438: &metadata_create_package_def($uri,$key,'default',
4439: \%metathesekeys);
4440: }
4441: }
4442: # are there custom rights to evaluate
4443: if ($metacache{$uri}->{':copyright'} eq 'custom') {
4444:
4445: #
4446: # Importing a rights file here
4447: #
4448: unless ($depthcount) {
4449: my $location=$metacache{$uri}->{':customdistributionfile'};
4450: my $dir=$filename;
4451: $dir=~s|[^/]*$||;
4452: $location=&filelocation($dir,$location);
4453: foreach (sort(split(/\,/,&metadata($uri,'keys',
4454: $location,'_rights',
4455: $depthcount+1)))) {
4456: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
4457: $metathesekeys{$_}=1;
4458: }
4459: }
4460: }
4461: $metacache{$uri}->{':keys'}=join(',',keys %metathesekeys);
4462: &metadata_generate_part0(\%metathesekeys,$metacache{$uri},$uri);
4463: $metacache{$uri}->{':allpossiblekeys'}=join(',',keys %metathesekeys);
4464: &do_cache(\%metacache,$uri,$metacache{$uri},'meta');
4465: # this is the end of "was not already recently cached
4466: }
4467: return $metacache{$uri}->{':'.$what};
4468: }
4469:
4470: sub metadata_create_package_def {
4471: my ($uri,$key,$package,$metathesekeys)=@_;
4472: my ($pack,$name,$subp)=split(/\&/,$key);
4473: if ($subp eq 'default') { next; }
4474:
4475: if (defined($metacache{$uri}->{':packages'})) {
4476: $metacache{$uri}->{':packages'}.=','.$package;
4477: } else {
4478: $metacache{$uri}->{':packages'}=$package;
4479: }
4480: my $value=$packagetab{$key};
4481: my $unikey;
4482: $unikey='parameter_0_'.$name;
4483: $metacache{$uri}->{':'.$unikey.'.part'}=0;
4484: $$metathesekeys{$unikey}=1;
4485: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4486: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
4487: }
4488: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4489: $metacache{$uri}->{':'.$unikey}=
4490: $metacache{$uri}->{':'.$unikey.'.default'};
4491: }
4492: }
4493:
4494: sub metadata_generate_part0 {
4495: my ($metadata,$metacache,$uri) = @_;
4496: my %allnames;
4497: foreach my $metakey (sort keys %$metadata) {
4498: if ($metakey=~/^parameter\_(.*)/) {
4499: my $part=$$metacache{':'.$metakey.'.part'};
4500: my $name=$$metacache{':'.$metakey.'.name'};
4501: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
4502: $allnames{$name}=$part;
4503: }
4504: }
4505: }
4506: foreach my $name (keys(%allnames)) {
4507: $$metadata{"parameter_0_$name"}=1;
4508: my $key=":parameter_0_$name";
4509: $$metacache{"$key.part"}='0';
4510: $$metacache{"$key.name"}=$name;
4511: $$metacache{"$key.type"}=$$metacache{':parameter_'.
4512: $allnames{$name}.'_'.$name.
4513: '.type'};
4514: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
4515: '.display'};
4516: my $expr='\\[Part: '.$allnames{$name}.'\\]';
4517: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
4518: $$metacache{"$key.display"}=$olddis;
4519: }
4520: }
4521:
4522: # ------------------------------------------------- Get the title of a resource
4523:
4524: sub gettitle {
4525: my $urlsymb=shift;
4526: my $symb=&symbread($urlsymb);
4527: if ($symb) {
4528: my ($result,$cached)=&is_cached(\%titlecache,$symb,'title',600);
4529: if (defined($cached)) { return $result; }
4530: my ($map,$resid,$url)=&decode_symb($symb);
4531: my $title='';
4532: my %bighash;
4533: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4534: &GDBM_READER(),0640)) {
4535: my $mapid=$bighash{'map_pc_'.&clutter($map)};
4536: $title=$bighash{'title_'.$mapid.'.'.$resid};
4537: untie %bighash;
4538: }
4539: $title=~s/\&colon\;/\:/gs;
4540: if ($title) {
4541: return &do_cache(\%titlecache,$symb,$title,'title');
4542: }
4543: $urlsymb=$url;
4544: }
4545: my $title=&metadata($urlsymb,'title');
4546: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
4547: return $title;
4548: }
4549:
4550: # ------------------------------------------------- Update symbolic store links
4551:
4552: sub symblist {
4553: my ($mapname,%newhash)=@_;
4554: $mapname=&deversion(&declutter($mapname));
4555: my %hash;
4556: if (($ENV{'request.course.fn'}) && (%newhash)) {
4557: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4558: &GDBM_WRCREAT(),0640)) {
4559: foreach (keys %newhash) {
4560: $hash{declutter($_)}=$mapname.'___'.&deversion($newhash{$_});
4561: }
4562: if (untie(%hash)) {
4563: return 'ok';
4564: }
4565: }
4566: }
4567: return 'error';
4568: }
4569:
4570: # --------------------------------------------------------------- Verify a symb
4571:
4572: sub symbverify {
4573: my ($symb,$thisurl)=@_;
4574: my $thisfn=$thisurl;
4575: # wrapper not part of symbs
4576: $thisfn=~s/^\/adm\/wrapper//;
4577: $thisfn=&declutter($thisfn);
4578: # direct jump to resource in page or to a sequence - will construct own symbs
4579: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
4580: # check URL part
4581: my ($map,$resid,$url)=&decode_symb($symb);
4582:
4583: unless ($url eq $thisfn) { return 0; }
4584:
4585: $symb=&symbclean($symb);
4586: $thisurl=&deversion($thisurl);
4587: $thisfn=&deversion($thisfn);
4588:
4589: my %bighash;
4590: my $okay=0;
4591:
4592: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4593: &GDBM_READER(),0640)) {
4594: my $ids=$bighash{'ids_'.&clutter($thisurl)};
4595: unless ($ids) {
4596: $ids=$bighash{'ids_/'.$thisurl};
4597: }
4598: if ($ids) {
4599: # ------------------------------------------------------------------- Has ID(s)
4600: foreach (split(/\,/,$ids)) {
4601: my ($mapid,$resid)=split(/\./,$_);
4602: if (
4603: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
4604: eq $symb) {
4605: $okay=1;
4606: }
4607: }
4608: }
4609: untie(%bighash);
4610: }
4611: return $okay;
4612: }
4613:
4614: # --------------------------------------------------------------- Clean-up symb
4615:
4616: sub symbclean {
4617: my $symb=shift;
4618:
4619: # remove version from map
4620: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
4621:
4622: # remove version from URL
4623: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
4624:
4625: # remove wrapper
4626:
4627: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
4628: return $symb;
4629: }
4630:
4631: # ---------------------------------------------- Split symb to find map and url
4632:
4633: sub encode_symb {
4634: my ($map,$resid,$url)=@_;
4635: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
4636: }
4637:
4638: sub decode_symb {
4639: my ($map,$resid,$url)=split(/\_\_\_/,shift);
4640: return (&fixversion($map),$resid,&fixversion($url));
4641: }
4642:
4643: sub fixversion {
4644: my $fn=shift;
4645: if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
4646: my %bighash;
4647: my $uri=&clutter($fn);
4648: my $key=$ENV{'request.course.id'}.'_'.$uri;
4649: # is this cached?
4650: my ($result,$cached)=&is_cached(\%courseresversioncache,$key,
4651: 'courseresversion',600);
4652: if (defined($cached)) { return $result; }
4653: # unfortunately not cached, or expired
4654: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4655: &GDBM_READER(),0640)) {
4656: if ($bighash{'version_'.$uri}) {
4657: my $version=$bighash{'version_'.$uri};
4658: unless (($version eq 'mostrecent') ||
4659: ($version==&getversion($uri))) {
4660: $uri=~s/\.(\w+)$/\.$version\.$1/;
4661: }
4662: }
4663: untie %bighash;
4664: }
4665: return &do_cache
4666: (\%courseresversioncache,$key,&declutter($uri),'courseresversion');
4667: }
4668:
4669: sub deversion {
4670: my $url=shift;
4671: $url=~s/\.\d+\.(\w+)$/\.$1/;
4672: return $url;
4673: }
4674:
4675: # ------------------------------------------------------ Return symb list entry
4676:
4677: sub symbread {
4678: my ($thisfn,$donotrecurse)=@_;
4679: my $cache_str='request.symbread.cached.'.$thisfn;
4680: if (defined($ENV{$cache_str})) { return $ENV{$cache_str}; }
4681: # no filename provided? try from environment
4682: unless ($thisfn) {
4683: if ($ENV{'request.symb'}) {
4684: return $ENV{$cache_str}=&symbclean($ENV{'request.symb'});
4685: }
4686: $thisfn=$ENV{'request.filename'};
4687: }
4688: # is that filename actually a symb? Verify, clean, and return
4689: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
4690: if (&symbverify($thisfn,$1)) {
4691: return $ENV{$cache_str}=&symbclean($thisfn);
4692: }
4693: }
4694: $thisfn=declutter($thisfn);
4695: my %hash;
4696: my %bighash;
4697: my $syval='';
4698: if (($ENV{'request.course.fn'}) && ($thisfn)) {
4699: my $targetfn = $thisfn;
4700: if ( ($thisfn =~ m/^uploaded\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
4701: $targetfn = 'adm/wrapper/'.$thisfn;
4702: }
4703: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4704: &GDBM_READER(),0640)) {
4705: $syval=$hash{$targetfn};
4706: untie(%hash);
4707: }
4708: # ---------------------------------------------------------- There was an entry
4709: if ($syval) {
4710: unless ($syval=~/\_\d+$/) {
4711: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
4712: &appenv('request.ambiguous' => $thisfn);
4713: return $ENV{$cache_str}='';
4714: }
4715: $syval.=$1;
4716: }
4717: } else {
4718: # ------------------------------------------------------- Was not in symb table
4719: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4720: &GDBM_READER(),0640)) {
4721: # ---------------------------------------------- Get ID(s) for current resource
4722: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4723: unless ($ids) {
4724: $ids=$bighash{'ids_/'.$thisfn};
4725: }
4726: unless ($ids) {
4727: # alias?
4728: $ids=$bighash{'mapalias_'.$thisfn};
4729: }
4730: if ($ids) {
4731: # ------------------------------------------------------------------- Has ID(s)
4732: my @possibilities=split(/\,/,$ids);
4733: if ($#possibilities==0) {
4734: # ----------------------------------------------- There is only one possibility
4735: my ($mapid,$resid)=split(/\./,$ids);
4736: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
4737: } elsif (!$donotrecurse) {
4738: # ------------------------------------------ There is more than one possibility
4739: my $realpossible=0;
4740: foreach (@possibilities) {
4741: my $file=$bighash{'src_'.$_};
4742: if (&allowed('bre',$file)) {
4743: my ($mapid,$resid)=split(/\./,$_);
4744: if ($bighash{'map_type_'.$mapid} ne 'page') {
4745: $realpossible++;
4746: $syval=declutter($bighash{'map_id_'.$mapid}).
4747: '___'.$resid;
4748: }
4749: }
4750: }
4751: if ($realpossible!=1) { $syval=''; }
4752: } else {
4753: $syval='';
4754: }
4755: }
4756: untie(%bighash)
4757: }
4758: }
4759: if ($syval) {
4760: return $ENV{$cache_str}=&symbclean($syval.'___'.$thisfn);
4761: }
4762: }
4763: &appenv('request.ambiguous' => $thisfn);
4764: return $ENV{$cache_str}='';
4765: }
4766:
4767: # ---------------------------------------------------------- Return random seed
4768:
4769: sub numval {
4770: my $txt=shift;
4771: $txt=~tr/A-J/0-9/;
4772: $txt=~tr/a-j/0-9/;
4773: $txt=~tr/K-T/0-9/;
4774: $txt=~tr/k-t/0-9/;
4775: $txt=~tr/U-Z/0-5/;
4776: $txt=~tr/u-z/0-5/;
4777: $txt=~s/\D//g;
4778: return int($txt);
4779: }
4780:
4781: sub numval2 {
4782: my $txt=shift;
4783: $txt=~tr/A-J/0-9/;
4784: $txt=~tr/a-j/0-9/;
4785: $txt=~tr/K-T/0-9/;
4786: $txt=~tr/k-t/0-9/;
4787: $txt=~tr/U-Z/0-5/;
4788: $txt=~tr/u-z/0-5/;
4789: $txt=~s/\D//g;
4790: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
4791: my $total;
4792: foreach my $val (@txts) { $total+=$val; }
4793: return int($total);
4794: }
4795:
4796: sub latest_rnd_algorithm_id {
4797: return '64bit3';
4798: }
4799:
4800: sub get_rand_alg {
4801: my ($courseid)=@_;
4802: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
4803: if ($courseid) {
4804: return $ENV{"course.$courseid.rndseed"};
4805: }
4806: return &latest_rnd_algorithm_id();
4807: }
4808:
4809: sub getCODE {
4810: if (defined($ENV{'form.CODE'})) { return $ENV{'form.CODE'}; }
4811: if (defined($Apache::lonhomework::parsing_a_problem) &&
4812: defined($Apache::lonhomework::history{'resource.CODE'})) {
4813: return $Apache::lonhomework::history{'resource.CODE'};
4814: }
4815: return undef;
4816: }
4817:
4818: sub rndseed {
4819: my ($symb,$courseid,$domain,$username)=@_;
4820:
4821: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
4822: if (!$symb) {
4823: unless ($symb=$wsymb) { return time; }
4824: }
4825: if (!$courseid) { $courseid=$wcourseid; }
4826: if (!$domain) { $domain=$wdomain; }
4827: if (!$username) { $username=$wusername }
4828: my $which=&get_rand_alg();
4829: if (defined(&getCODE())) {
4830: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
4831: } elsif ($which eq '64bit3') {
4832: return &rndseed_64bit3($symb,$courseid,$domain,$username);
4833: } elsif ($which eq '64bit2') {
4834: return &rndseed_64bit2($symb,$courseid,$domain,$username);
4835: } elsif ($which eq '64bit') {
4836: return &rndseed_64bit($symb,$courseid,$domain,$username);
4837: }
4838: return &rndseed_32bit($symb,$courseid,$domain,$username);
4839: }
4840:
4841: sub rndseed_32bit {
4842: my ($symb,$courseid,$domain,$username)=@_;
4843: {
4844: use integer;
4845: my $symbchck=unpack("%32C*",$symb) << 27;
4846: my $symbseed=numval($symb) << 22;
4847: my $namechck=unpack("%32C*",$username) << 17;
4848: my $nameseed=numval($username) << 12;
4849: my $domainseed=unpack("%32C*",$domain) << 7;
4850: my $courseseed=unpack("%32C*",$courseid);
4851: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
4852: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4853: #&Apache::lonxml::debug("rndseed :$num:$symb");
4854: return $num;
4855: }
4856: }
4857:
4858: sub rndseed_64bit {
4859: my ($symb,$courseid,$domain,$username)=@_;
4860: {
4861: use integer;
4862: my $symbchck=unpack("%32S*",$symb) << 21;
4863: my $symbseed=numval($symb) << 10;
4864: my $namechck=unpack("%32S*",$username);
4865:
4866: my $nameseed=numval($username) << 21;
4867: my $domainseed=unpack("%32S*",$domain) << 10;
4868: my $courseseed=unpack("%32S*",$courseid);
4869:
4870: my $num1=$symbchck+$symbseed+$namechck;
4871: my $num2=$nameseed+$domainseed+$courseseed;
4872: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4873: #&Apache::lonxml::debug("rndseed :$num:$symb");
4874: return "$num1,$num2";
4875: }
4876: }
4877:
4878: sub rndseed_64bit2 {
4879: my ($symb,$courseid,$domain,$username)=@_;
4880: {
4881: use integer;
4882: # strings need to be an even # of cahracters long, it it is odd the
4883: # last characters gets thrown away
4884: my $symbchck=unpack("%32S*",$symb.' ') << 21;
4885: my $symbseed=numval($symb) << 10;
4886: my $namechck=unpack("%32S*",$username.' ');
4887:
4888: my $nameseed=numval($username) << 21;
4889: my $domainseed=unpack("%32S*",$domain.' ') << 10;
4890: my $courseseed=unpack("%32S*",$courseid.' ');
4891:
4892: my $num1=$symbchck+$symbseed+$namechck;
4893: my $num2=$nameseed+$domainseed+$courseseed;
4894: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4895: #&Apache::lonxml::debug("rndseed :$num:$symb");
4896: return "$num1,$num2";
4897: }
4898: }
4899:
4900: sub rndseed_64bit3 {
4901: my ($symb,$courseid,$domain,$username)=@_;
4902: {
4903: use integer;
4904: # strings need to be an even # of cahracters long, it it is odd the
4905: # last characters gets thrown away
4906: my $symbchck=unpack("%32S*",$symb.' ') << 21;
4907: my $symbseed=numval2($symb) << 10;
4908: my $namechck=unpack("%32S*",$username.' ');
4909:
4910: my $nameseed=numval2($username) << 21;
4911: my $domainseed=unpack("%32S*",$domain.' ') << 10;
4912: my $courseseed=unpack("%32S*",$courseid.' ');
4913:
4914: my $num1=$symbchck+$symbseed+$namechck;
4915: my $num2=$nameseed+$domainseed+$courseseed;
4916: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4917: #&Apache::lonxml::debug("rndseed :$num:$symb");
4918: return "$num1:$num2";
4919: }
4920: }
4921:
4922: sub rndseed_CODE_64bit {
4923: my ($symb,$courseid,$domain,$username)=@_;
4924: {
4925: use integer;
4926: my $symbchck=unpack("%32S*",$symb.' ') << 16;
4927: my $symbseed=numval2($symb);
4928: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
4929: my $CODEseed=numval(&getCODE());
4930: my $courseseed=unpack("%32S*",$courseid.' ');
4931: my $num1=$symbseed+$CODEchck;
4932: my $num2=$CODEseed+$courseseed+$symbchck;
4933: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
4934: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
4935: return "$num1:$num2";
4936: }
4937: }
4938:
4939: sub setup_random_from_rndseed {
4940: my ($rndseed)=@_;
4941: if ($rndseed =~/([,:])/) {
4942: my ($num1,$num2)=split(/[,:]/,$rndseed);
4943: &Math::Random::random_set_seed(abs($num1),abs($num2));
4944: } else {
4945: &Math::Random::random_set_seed_from_phrase($rndseed);
4946: }
4947: }
4948:
4949: sub latest_receipt_algorithm_id {
4950: return 'receipt2';
4951: }
4952:
4953: sub recunique {
4954: my $fucourseid=shift;
4955: my $unique;
4956: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
4957: $unique=$ENV{"course.$fucourseid.internal.encseed"};
4958: } else {
4959: $unique=$perlvar{'lonReceipt'};
4960: }
4961: return unpack("%32C*",$unique);
4962: }
4963:
4964: sub recprefix {
4965: my $fucourseid=shift;
4966: my $prefix;
4967: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
4968: $prefix=$ENV{"course.$fucourseid.internal.encpref"};
4969: } else {
4970: $prefix=$perlvar{'lonHostID'};
4971: }
4972: return unpack("%32C*",$prefix);
4973: }
4974:
4975: sub ireceipt {
4976: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
4977: my $cuname=unpack("%32C*",$funame);
4978: my $cudom=unpack("%32C*",$fudom);
4979: my $cucourseid=unpack("%32C*",$fucourseid);
4980: my $cusymb=unpack("%32C*",$fusymb);
4981: my $cunique=&recunique($fucourseid);
4982: my $cpart=unpack("%32S*",$part);
4983: my $return =&recprefix($fucourseid).'-';
4984: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
4985: $ENV{'request.state'} eq 'construct') {
4986: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
4987: " and ".($cpart%$cudom));
4988:
4989: $return.= ($cunique%$cuname+
4990: $cunique%$cudom+
4991: $cusymb%$cuname+
4992: $cusymb%$cudom+
4993: $cucourseid%$cuname+
4994: $cucourseid%$cudom+
4995: $cpart%$cuname+
4996: $cpart%$cudom);
4997: } else {
4998: $return.= ($cunique%$cuname+
4999: $cunique%$cudom+
5000: $cusymb%$cuname+
5001: $cusymb%$cudom+
5002: $cucourseid%$cuname+
5003: $cucourseid%$cudom);
5004: }
5005: return $return;
5006: }
5007:
5008: sub receipt {
5009: my ($part)=@_;
5010: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
5011: return &ireceipt($name,$domain,$courseid,$symb,$part);
5012: }
5013:
5014: # ------------------------------------------------------------ Serves up a file
5015: # returns either the contents of the file or
5016: # -1 if the file doesn't exist
5017: #
5018: # if the target is a file that was uploaded via DOCS,
5019: # a check will be made to see if a current copy exists on the local server,
5020: # if it does this will be served, otherwise a copy will be retrieved from
5021: # the home server for the course and stored in /home/httpd/html/userfiles on
5022: # the local server.
5023:
5024: sub getfile {
5025: my ($file) = @_;
5026:
5027: if ($file =~ m|^/*uploaded/|) { $file=&filelocation("",$file); }
5028: &repcopy($file);
5029: return &readfile($file);
5030: }
5031:
5032: sub repcopy_userfile {
5033: my ($file)=@_;
5034:
5035: if ($file =~ m|^/*uploaded/|) { $file=&filelocation("",$file); }
5036: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return OK; }
5037:
5038: my ($cdom,$cnum,$filename) =
5039: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
5040: my ($info,$rtncode);
5041: my $uri="/uploaded/$cdom/$cnum/$filename";
5042: if (-e "$file") {
5043: my @fileinfo = stat($file);
5044: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
5045: if ($lwpresp ne 'ok') {
5046: if ($rtncode eq '404') {
5047: unlink($file);
5048: }
5049: #my $ua=new LWP::UserAgent;
5050: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5051: #my $response=$ua->request($request);
5052: #if ($response->is_success()) {
5053: # return $response->content;
5054: # } else {
5055: # return -1;
5056: # }
5057: return -1;
5058: }
5059: if ($info < $fileinfo[9]) {
5060: return OK;
5061: }
5062: $info = '';
5063: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5064: if ($lwpresp ne 'ok') {
5065: return -1;
5066: }
5067: } else {
5068: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5069: if ($lwpresp ne 'ok') {
5070: my $ua=new LWP::UserAgent;
5071: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5072: my $response=$ua->request($request);
5073: if ($response->is_success()) {
5074: $info=$response->content;
5075: } else {
5076: return -1;
5077: }
5078: }
5079: my @parts = ($cdom,$cnum);
5080: if ($filename =~ m|^(.+)/[^/]+$|) {
5081: push @parts, split(/\//,$1);
5082: }
5083: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
5084: foreach my $part (@parts) {
5085: $path .= '/'.$part;
5086: if (!-e $path) {
5087: mkdir($path,0770);
5088: }
5089: }
5090: }
5091: open(FILE,">$file");
5092: print FILE $info;
5093: close(FILE);
5094: return OK;
5095: }
5096:
5097: sub tokenwrapper {
5098: my $uri=shift;
5099: $uri=~s|^http\://([^/]+)||;
5100: $uri=~s|^/||;
5101: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
5102: my $token=$1;
5103: my (undef,$udom,$uname,$file)=split('/',$uri,4);
5104: if ($udom && $uname && $file) {
5105: $file=~s|(\?\.*)*$||;
5106: &appenv("userfile.$udom/$uname/$file" => $ENV{'request.course.id'});
5107: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
5108: (($uri=~/\?/)?'&':'?').'token='.$token.
5109: '&tokenissued='.$perlvar{'lonHostID'};
5110: } else {
5111: return '/adm/notfound.html';
5112: }
5113: }
5114:
5115: sub getuploaded {
5116: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
5117: $uri=~s/^\///;
5118: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
5119: my $ua=new LWP::UserAgent;
5120: my $request=new HTTP::Request($reqtype,$uri);
5121: my $response=$ua->request($request);
5122: $$rtncode = $response->code;
5123: if (! $response->is_success()) {
5124: return 'failed';
5125: }
5126: if ($reqtype eq 'HEAD') {
5127: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
5128: } elsif ($reqtype eq 'GET') {
5129: $$info = $response->content;
5130: }
5131: return 'ok';
5132: }
5133:
5134: sub readfile {
5135: my $file = shift;
5136: if ( (! -e $file ) || ($file eq '') ) { return -1; };
5137: my $fh;
5138: open($fh,"<$file");
5139: my $a='';
5140: while (<$fh>) { $a .=$_; }
5141: return $a;
5142: }
5143:
5144: sub filelocation {
5145: my ($dir,$file) = @_;
5146: my $location;
5147: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
5148: if ($file=~m:^/~:) { # is a contruction space reference
5149: $location = $file;
5150: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
5151: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
5152: my ($udom,$uname,$filename)=
5153: ($file=~m|^/+uploaded/+([^/]+)/+([^/]+)/+(.*)$|);
5154: my $home=&homeserver($uname,$udom);
5155: my $is_me=0;
5156: my @ids=¤t_machine_ids();
5157: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
5158: if ($is_me) {
5159: $location=&Apache::loncommon::propath($udom,$uname).
5160: '/userfiles/'.$filename;
5161: } else {
5162: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
5163: $udom.'/'.$uname.'/'.$filename;
5164: }
5165: } else {
5166: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5167: $file=~s:^/res/:/:;
5168: if ( !( $file =~ m:^/:) ) {
5169: $location = $dir. '/'.$file;
5170: } else {
5171: $location = '/home/httpd/html/res'.$file;
5172: }
5173: }
5174: $location=~s://+:/:g; # remove duplicate /
5175: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
5176: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
5177: return $location;
5178: }
5179:
5180: sub hreflocation {
5181: my ($dir,$file)=@_;
5182: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
5183: my $finalpath=filelocation($dir,$file);
5184: $finalpath=~s-^/home/httpd/html--;
5185: $finalpath=~s-^/home/(\w+)/public_html/-/~$1/-;
5186: return $finalpath;
5187: } elsif ($file=~m-^/home-) {
5188: $file=~s-^/home/httpd/html--;
5189: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
5190: return $file;
5191: }
5192: return $file;
5193: }
5194:
5195: sub current_machine_domains {
5196: my $hostname=$hostname{$perlvar{'lonHostID'}};
5197: my @domains;
5198: while( my($id, $name) = each(%hostname)) {
5199: # &logthis("-$id-$name-$hostname-");
5200: if ($hostname eq $name) {
5201: push(@domains,$hostdom{$id});
5202: }
5203: }
5204: return @domains;
5205: }
5206:
5207: sub current_machine_ids {
5208: my $hostname=$hostname{$perlvar{'lonHostID'}};
5209: my @ids;
5210: while( my($id, $name) = each(%hostname)) {
5211: # &logthis("-$id-$name-$hostname-");
5212: if ($hostname eq $name) {
5213: push(@ids,$id);
5214: }
5215: }
5216: return @ids;
5217: }
5218:
5219: # ------------------------------------------------------------- Declutters URLs
5220:
5221: sub declutter {
5222: my $thisfn=shift;
5223: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5224: $thisfn=~s/^\///;
5225: $thisfn=~s/^res\///;
5226: $thisfn=~s/\?.+$//;
5227: return $thisfn;
5228: }
5229:
5230: # ------------------------------------------------------------- Clutter up URLs
5231:
5232: sub clutter {
5233: my $thisfn='/'.&declutter(shift);
5234: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv|public)\//) {
5235: $thisfn='/res'.$thisfn;
5236: }
5237: return $thisfn;
5238: }
5239:
5240: # -------------------------------------------------------- Escape Special Chars
5241:
5242: sub escape {
5243: my $str=shift;
5244: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
5245: return $str;
5246: }
5247:
5248: # ----------------------------------------------------- Un-Escape Special Chars
5249:
5250: sub unescape {
5251: my $str=shift;
5252: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
5253: return $str;
5254: }
5255:
5256: sub mod_perl_version {
5257: if (defined($perlvar{'MODPERL2'})) {
5258: return 2;
5259: }
5260: return 1;
5261: }
5262:
5263: sub correct_line_ends {
5264: my ($result)=@_;
5265: $$result =~s/\r\n/\n/mg;
5266: $$result =~s/\r/\n/mg;
5267: }
5268: # ================================================================ Main Program
5269:
5270: sub goodbye {
5271: &logthis("Starting Shut down");
5272: #not converted to using infrastruture and probably shouldn't be
5273: &logthis(sprintf("%-20s is %s",'%badServerCache',scalar(%badServerCache)));
5274: #converted
5275: &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
5276: &logthis(sprintf("%-20s is %s",'%homecache',scalar(%homecache)));
5277: &logthis(sprintf("%-20s is %s",'%titlecache',scalar(%titlecache)));
5278: &logthis(sprintf("%-20s is %s",'%courseresdatacache',scalar(%courseresdatacache)));
5279: #1.1 only
5280: &logthis(sprintf("%-20s is %s",'%userresdatacache',scalar(%userresdatacache)));
5281: &logthis(sprintf("%-20s is %s",'%getsectioncache',scalar(%getsectioncache)));
5282: &logthis(sprintf("%-20s is %s",'%courseresversioncache',scalar(%courseresversioncache)));
5283: &logthis(sprintf("%-20s is %s",'%resversioncache',scalar(%resversioncache)));
5284: &flushcourselogs();
5285: &logthis("Shutting down");
5286: return DONE;
5287: }
5288:
5289: BEGIN {
5290: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
5291: unless ($readit) {
5292: {
5293: open(my $config,"</etc/httpd/conf/loncapa.conf");
5294:
5295: while (my $configline=<$config>) {
5296: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
5297: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5298: chomp($varvalue);
5299: $perlvar{$varname}=$varvalue;
5300: }
5301: }
5302: close($config);
5303: }
5304: {
5305: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
5306:
5307: while (my $configline=<$config>) {
5308: if ($configline =~ /^[^\#]*PerlSetVar/) {
5309: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5310: chomp($varvalue);
5311: $perlvar{$varname}=$varvalue;
5312: }
5313: }
5314: close($config);
5315: }
5316:
5317: # ------------------------------------------------------------ Read domain file
5318: {
5319: %domaindescription = ();
5320: %domain_auth_def = ();
5321: %domain_auth_arg_def = ();
5322: my $fh;
5323: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
5324: while (<$fh>) {
5325: next if (/^(\#|\s*$)/);
5326: # next if /^\#/;
5327: chomp;
5328: my ($domain, $domain_description, $def_auth, $def_auth_arg,
5329: $def_lang, $city, $longi, $lati) = split(/:/,$_);
5330: $domain_auth_def{$domain}=$def_auth;
5331: $domain_auth_arg_def{$domain}=$def_auth_arg;
5332: $domaindescription{$domain}=$domain_description;
5333: $domain_lang_def{$domain}=$def_lang;
5334: $domain_city{$domain}=$city;
5335: $domain_longi{$domain}=$longi;
5336: $domain_lati{$domain}=$lati;
5337:
5338: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
5339: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
5340: }
5341: }
5342: close ($fh);
5343: }
5344:
5345:
5346: # ------------------------------------------------------------- Read hosts file
5347: {
5348: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
5349:
5350: while (my $configline=<$config>) {
5351: next if ($configline =~ /^(\#|\s*$)/);
5352: chomp($configline);
5353: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
5354: if ($id && $domain && $role && $name && $ip) {
5355: $hostname{$id}=$name;
5356: $hostdom{$id}=$domain;
5357: $hostip{$id}=$ip;
5358: $iphost{$ip}=$id;
5359: if ($role eq 'library') { $libserv{$id}=$name; }
5360: }
5361: }
5362: close($config);
5363: }
5364:
5365: # ------------------------------------------------------ Read spare server file
5366: {
5367: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
5368:
5369: while (my $configline=<$config>) {
5370: chomp($configline);
5371: if ($configline) {
5372: $spareid{$configline}=1;
5373: }
5374: }
5375: close($config);
5376: }
5377: # ------------------------------------------------------------ Read permissions
5378: {
5379: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
5380:
5381: while (my $configline=<$config>) {
5382: chomp($configline);
5383: if ($configline) {
5384: my ($role,$perm)=split(/ /,$configline);
5385: if ($perm ne '') { $pr{$role}=$perm; }
5386: }
5387: }
5388: close($config);
5389: }
5390:
5391: # -------------------------------------------- Read plain texts for permissions
5392: {
5393: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
5394:
5395: while (my $configline=<$config>) {
5396: chomp($configline);
5397: if ($configline) {
5398: my ($short,$plain)=split(/:/,$configline);
5399: if ($plain ne '') { $prp{$short}=$plain; }
5400: }
5401: }
5402: close($config);
5403: }
5404:
5405: # ---------------------------------------------------------- Read package table
5406: {
5407: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
5408:
5409: while (my $configline=<$config>) {
5410: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
5411: chomp($configline);
5412: my ($short,$plain)=split(/:/,$configline);
5413: my ($pack,$name)=split(/\&/,$short);
5414: if ($plain ne '') {
5415: $packagetab{$pack.'&'.$name.'&name'}=$name;
5416: $packagetab{$short}=$plain;
5417: }
5418: }
5419: close($config);
5420: }
5421:
5422: # ------------- set up temporary directory
5423: {
5424: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
5425:
5426: }
5427:
5428: %metacache=();
5429:
5430: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
5431: $dumpcount=0;
5432:
5433: &logtouch();
5434: &logthis('<font color=yellow>INFO: Read configuration</font>');
5435: $readit=1;
5436: }
5437: }
5438:
5439: 1;
5440: __END__
5441:
5442: =pod
5443:
5444: =head1 NAME
5445:
5446: Apache::lonnet - Subroutines to ask questions about things in the network.
5447:
5448: =head1 SYNOPSIS
5449:
5450: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
5451:
5452: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
5453:
5454: Common parameters:
5455:
5456: =over 4
5457:
5458: =item *
5459:
5460: $uname : an internal username (if $cname expecting a course Id specifically)
5461:
5462: =item *
5463:
5464: $udom : a domain (if $cdom expecting a course's domain specifically)
5465:
5466: =item *
5467:
5468: $symb : a resource instance identifier
5469:
5470: =item *
5471:
5472: $namespace : the name of a .db file that contains the data needed or
5473: being set.
5474:
5475: =back
5476:
5477: =head1 OVERVIEW
5478:
5479: lonnet provides subroutines which interact with the
5480: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
5481: about classes, users, and resources.
5482:
5483: For many of these objects you can also use this to store data about
5484: them or modify them in various ways.
5485:
5486: =head2 Symbs
5487:
5488: To identify a specific instance of a resource, LON-CAPA uses symbols
5489: or "symbs"X<symb>. These identifiers are built from the URL of the
5490: map, the resource number of the resource in the map, and the URL of
5491: the resource itself. The latter is somewhat redundant, but might help
5492: if maps change.
5493:
5494: An example is
5495:
5496: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
5497:
5498: The respective map entry is
5499:
5500: <resource id="19" src="/res/msu/korte/tests/part12.problem"
5501: title="Problem 2">
5502: </resource>
5503:
5504: Symbs are used by the random number generator, as well as to store and
5505: restore data specific to a certain instance of for example a problem.
5506:
5507: =head2 Storing And Retrieving Data
5508:
5509: X<store()>X<cstore()>X<restore()>Three of the most important functions
5510: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
5511: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
5512: is is the non-critical message twin of cstore. These functions are for
5513: handlers to store a perl hash to a user's permanent data space in an
5514: easy manner, and to retrieve it again on another call. It is expected
5515: that a handler would use this once at the beginning to retrieve data,
5516: and then again once at the end to send only the new data back.
5517:
5518: The data is stored in the user's data directory on the user's
5519: homeserver under the ID of the course.
5520:
5521: The hash that is returned by restore will have all of the previous
5522: value for all of the elements of the hash.
5523:
5524: Example:
5525:
5526: #creating a hash
5527: my %hash;
5528: $hash{'foo'}='bar';
5529:
5530: #storing it
5531: &Apache::lonnet::cstore(\%hash);
5532:
5533: #changing a value
5534: $hash{'foo'}='notbar';
5535:
5536: #adding a new value
5537: $hash{'bar'}='foo';
5538: &Apache::lonnet::cstore(\%hash);
5539:
5540: #retrieving the hash
5541: my %history=&Apache::lonnet::restore();
5542:
5543: #print the hash
5544: foreach my $key (sort(keys(%history))) {
5545: print("\%history{$key} = $history{$key}");
5546: }
5547:
5548: Will print out:
5549:
5550: %history{1:foo} = bar
5551: %history{1:keys} = foo:timestamp
5552: %history{1:timestamp} = 990455579
5553: %history{2:bar} = foo
5554: %history{2:foo} = notbar
5555: %history{2:keys} = foo:bar:timestamp
5556: %history{2:timestamp} = 990455580
5557: %history{bar} = foo
5558: %history{foo} = notbar
5559: %history{timestamp} = 990455580
5560: %history{version} = 2
5561:
5562: Note that the special hash entries C<keys>, C<version> and
5563: C<timestamp> were added to the hash. C<version> will be equal to the
5564: total number of versions of the data that have been stored. The
5565: C<timestamp> attribute will be the UNIX time the hash was
5566: stored. C<keys> is available in every historical section to list which
5567: keys were added or changed at a specific historical revision of a
5568: hash.
5569:
5570: B<Warning>: do not store the hash that restore returns directly. This
5571: will cause a mess since it will restore the historical keys as if the
5572: were new keys. I.E. 1:foo will become 1:1:foo etc.
5573:
5574: Calling convention:
5575:
5576: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
5577: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
5578:
5579: For more detailed information, see lonnet specific documentation.
5580:
5581: =head1 RETURN MESSAGES
5582:
5583: =over 4
5584:
5585: =item * B<con_lost>: unable to contact remote host
5586:
5587: =item * B<con_delayed>: unable to contact remote host, message will be delivered
5588: when the connection is brought back up
5589:
5590: =item * B<con_failed>: unable to contact remote host and unable to save message
5591: for later delivery
5592:
5593: =item * B<error:>: an error a occured, a description of the error follows the :
5594:
5595: =item * B<no_such_host>: unable to fund a host associated with the user/domain
5596: that was requested
5597:
5598: =back
5599:
5600: =head1 PUBLIC SUBROUTINES
5601:
5602: =head2 Session Environment Functions
5603:
5604: =over 4
5605:
5606: =item *
5607: X<appenv()>
5608: B<appenv(%hash)>: the value of %hash is written to
5609: the user envirnoment file, and will be restored for each access this
5610: user makes during this session, also modifies the %ENV for the current
5611: process
5612:
5613: =item *
5614: X<delenv()>
5615: B<delenv($regexp)>: removes all items from the session
5616: environment file that matches the regular expression in $regexp. The
5617: values are also delted from the current processes %ENV.
5618:
5619: =back
5620:
5621: =head2 User Information
5622:
5623: =over 4
5624:
5625: =item *
5626: X<queryauthenticate()>
5627: B<queryauthenticate($uname,$udom)>: try to determine user's current
5628: authentication scheme
5629:
5630: =item *
5631: X<authenticate()>
5632: B<authenticate($uname,$upass,$udom)>: try to
5633: authenticate user from domain's lib servers (first use the current
5634: one). C<$upass> should be the users password.
5635:
5636: =item *
5637: X<homeserver()>
5638: B<homeserver($uname,$udom)>: find the server which has
5639: the user's directory and files (there must be only one), this caches
5640: the answer, and also caches if there is a borken connection.
5641:
5642: =item *
5643: X<idget()>
5644: B<idget($udom,@ids)>: find the usernames behind a list of IDs
5645: (IDs are a unique resource in a domain, there must be only 1 ID per
5646: username, and only 1 username per ID in a specific domain) (returns
5647: hash: id=>name,id=>name)
5648:
5649: =item *
5650: X<idrget()>
5651: B<idrget($udom,@unames)>: find the IDs behind a list of
5652: usernames (returns hash: name=>id,name=>id)
5653:
5654: =item *
5655: X<idput()>
5656: B<idput($udom,%ids)>: store away a list of names and associated IDs
5657:
5658: =item *
5659: X<rolesinit()>
5660: B<rolesinit($udom,$username,$authhost)>: get user privileges
5661:
5662: =item *
5663: X<getsection()>
5664: B<getsection($udom,$uname,$cname)>: finds the section of student in the
5665: course $cname, return section name/number or '' for "not in course"
5666: and '-1' for "no section"
5667:
5668: =item *
5669: X<userenvironment()>
5670: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
5671: passed in @what from the requested user's environment, returns a hash
5672:
5673: =back
5674:
5675: =head2 User Roles
5676:
5677: =over 4
5678:
5679: =item *
5680:
5681: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
5682: actions
5683: F: full access
5684: U,I,K: authentication modes (cxx only)
5685: '': forbidden
5686: 1: user needs to choose course
5687: 2: browse allowed
5688:
5689: =item *
5690:
5691: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
5692: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
5693: and course level
5694:
5695: =item *
5696:
5697: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
5698: explanation of a user role term
5699:
5700: =back
5701:
5702: =head2 User Modification
5703:
5704: =over 4
5705:
5706: =item *
5707:
5708: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
5709: user for the level given by URL. Optional start and end dates (leave empty
5710: string or zero for "no date")
5711:
5712: =item *
5713:
5714: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
5715: change a users, password, possible return values are: ok,
5716: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
5717: refused
5718:
5719: =item *
5720:
5721: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
5722:
5723: =item *
5724:
5725: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
5726: modify user
5727:
5728: =item *
5729:
5730: modifystudent
5731:
5732: modify a students enrollment and identification information.
5733: The course id is resolved based on the current users environment.
5734: This means the envoking user must be a course coordinator or otherwise
5735: associated with a course.
5736:
5737: This call is essentially a wrapper for lonnet::modifyuser and
5738: lonnet::modify_student_enrollment
5739:
5740: Inputs:
5741:
5742: =over 4
5743:
5744: =item B<$udom> Students loncapa domain
5745:
5746: =item B<$uname> Students loncapa login name
5747:
5748: =item B<$uid> Students id/student number
5749:
5750: =item B<$umode> Students authentication mode
5751:
5752: =item B<$upass> Students password
5753:
5754: =item B<$first> Students first name
5755:
5756: =item B<$middle> Students middle name
5757:
5758: =item B<$last> Students last name
5759:
5760: =item B<$gene> Students generation
5761:
5762: =item B<$usec> Students section in course
5763:
5764: =item B<$end> Unix time of the roles expiration
5765:
5766: =item B<$start> Unix time of the roles start date
5767:
5768: =item B<$forceid> If defined, allow $uid to be changed
5769:
5770: =item B<$desiredhome> server to use as home server for student
5771:
5772: =back
5773:
5774: =item *
5775:
5776: modify_student_enrollment
5777:
5778: Change a students enrollment status in a class. The environment variable
5779: 'role.request.course' must be defined for this function to proceed.
5780:
5781: Inputs:
5782:
5783: =over 4
5784:
5785: =item $udom, students domain
5786:
5787: =item $uname, students name
5788:
5789: =item $uid, students user id
5790:
5791: =item $first, students first name
5792:
5793: =item $middle
5794:
5795: =item $last
5796:
5797: =item $gene
5798:
5799: =item $usec
5800:
5801: =item $end
5802:
5803: =item $start
5804:
5805: =back
5806:
5807:
5808: =item *
5809:
5810: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
5811: custom role; give a custom role to a user for the level given by URL. Specify
5812: name and domain of role author, and role name
5813:
5814: =item *
5815:
5816: revokerole($udom,$uname,$url,$role) : revoke a role for url
5817:
5818: =item *
5819:
5820: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
5821:
5822: =back
5823:
5824: =head2 Course Infomation
5825:
5826: =over 4
5827:
5828: =item *
5829:
5830: coursedescription($courseid) : course description
5831:
5832: =item *
5833:
5834: courseresdata($coursenum,$coursedomain,@which) : request for current
5835: parameter setting for a specific course, @what should be a list of
5836: parameters to ask about. This routine caches answers for 5 minutes.
5837:
5838: =back
5839:
5840: =head2 Course Modification
5841:
5842: =over 4
5843:
5844: =item *
5845:
5846: writecoursepref($courseid,%prefs) : write preferences (environment
5847: database) for a course
5848:
5849: =item *
5850:
5851: createcourse($udom,$description,$url) : make/modify course
5852:
5853: =back
5854:
5855: =head2 Resource Subroutines
5856:
5857: =over 4
5858:
5859: =item *
5860:
5861: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
5862:
5863: =item *
5864:
5865: repcopy($filename) : subscribes to the requested file, and attempts to
5866: replicate from the owning library server, Might return
5867: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
5868: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
5869: resource. Expects the local filesystem pathname
5870: (/home/httpd/html/res/....)
5871:
5872: =back
5873:
5874: =head2 Resource Information
5875:
5876: =over 4
5877:
5878: =item *
5879:
5880: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
5881: a vairety of different possible values, $varname should be a request
5882: string, and the other parameters can be used to specify who and what
5883: one is asking about.
5884:
5885: Possible values for $varname are environment.lastname (or other item
5886: from the envirnment hash), user.name (or someother aspect about the
5887: user), resource.0.maxtries (or some other part and parameter of a
5888: resource)
5889:
5890: =item *
5891:
5892: directcondval($number) : get current value of a condition; reads from a state
5893: string
5894:
5895: =item *
5896:
5897: condval($condidx) : value of condition index based on state
5898:
5899: =item *
5900:
5901: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
5902: resource's metadata, $what should be either a specific key, or either
5903: 'keys' (to get a list of possible keys) or 'packages' to get a list of
5904: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
5905:
5906: this function automatically caches all requests
5907:
5908: =item *
5909:
5910: metadata_query($query,$custom,$customshow) : make a metadata query against the
5911: network of library servers; returns file handle of where SQL and regex results
5912: will be stored for query
5913:
5914: =item *
5915:
5916: symbread($filename) : return symbolic list entry (filename argument optional);
5917: returns the data handle
5918:
5919: =item *
5920:
5921: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
5922: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
5923: failure, user must be in a course, as it assumes the existance of the
5924: course initi hash, and uses $ENV('request.course.id'}
5925:
5926:
5927: =item *
5928:
5929: symbclean($symb) : removes versions numbers from a symb, returns the
5930: cleaned symb
5931:
5932: =item *
5933:
5934: is_on_map($uri) : checks if the $uri is somewhere on the current
5935: course map, user must be in a course for it to work.
5936:
5937: =item *
5938:
5939: numval($salt) : return random seed value (addend for rndseed)
5940:
5941: =item *
5942:
5943: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
5944: a random seed, all arguments are optional, if they aren't sent it uses the
5945: environment to derive them. Note: if symb isn't sent and it can't get one
5946: from &symbread it will use the current time as its return value
5947:
5948: =item *
5949:
5950: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
5951: unfakeable, receipt
5952:
5953: =item *
5954:
5955: receipt() : API to ireceipt working off of ENV values; given out to users
5956:
5957: =item *
5958:
5959: countacc($url) : count the number of accesses to a given URL
5960:
5961: =item *
5962:
5963: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
5964:
5965: =item *
5966:
5967: checkin($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 $tcrsid)
5968:
5969: =item *
5970:
5971: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
5972:
5973: =item *
5974:
5975: devalidate($symb) : devalidate temporary spreadsheet calculations,
5976: forcing spreadsheet to reevaluate the resource scores next time.
5977:
5978: =back
5979:
5980: =head2 Storing/Retreiving Data
5981:
5982: =over 4
5983:
5984: =item *
5985:
5986: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
5987: for this url; hashref needs to be given and should be a \%hashname; the
5988: remaining args aren't required and if they aren't passed or are '' they will
5989: be derived from the ENV
5990:
5991: =item *
5992:
5993: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
5994: uses critical subroutine
5995:
5996: =item *
5997:
5998: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
5999: all args are optional
6000:
6001: =item *
6002:
6003: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
6004: works very similar to store/cstore, but all data is stored in a
6005: temporary location and can be reset using tmpreset, $storehash should
6006: be a hash reference, returns nothing on success
6007:
6008: =item *
6009:
6010: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
6011: similar to restore, but all data is stored in a temporary location and
6012: can be reset using tmpreset. Returns a hash of values on success,
6013: error string otherwise.
6014:
6015: =item *
6016:
6017: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
6018: deltes all keys for $symb form the temporary storage hash.
6019:
6020: =item *
6021:
6022: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6023: reference filled in from namesp ($udom and $uname are optional)
6024:
6025: =item *
6026:
6027: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
6028: namesp ($udom and $uname are optional)
6029:
6030: =item *
6031:
6032: dump($namespace,$udom,$uname,$regexp) :
6033: dumps the complete (or key matching regexp) namespace into a hash
6034: ($udom, $uname and $regexp are optional)
6035:
6036: =item *
6037:
6038: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
6039: $store can be a scalar, an array reference, or if the amount to be
6040: incremented is > 1, a hash reference.
6041:
6042: ($udom and $uname are optional)
6043:
6044: =item *
6045:
6046: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
6047: ($udom and $uname are optional)
6048:
6049: =item *
6050:
6051: putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
6052: keys used in storehash include version information (e.g., 1:$symb:message etc.) as
6053: used in records written by &store and retrieved by &restore. This function
6054: was created for use in editing discussion posts, without incrementing the
6055: version number included in the key for a particular post. The colon
6056: separated list of attribute names (e.g., the value associated with the key
6057: 1:keys:$symb) is also generated and passed in the ampersand separated
6058: items sent to lonnet::reply().
6059:
6060: =item *
6061:
6062: cput($namespace,$storehash,$udom,$uname) : critical put
6063: ($udom and $uname are optional)
6064:
6065: =item *
6066:
6067: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6068: reference filled in from namesp (encrypts the return communication)
6069: ($udom and $uname are optional)
6070:
6071: =item *
6072:
6073: log($udom,$name,$home,$message) : write to permanent log for user; use
6074: critical subroutine
6075:
6076: =back
6077:
6078: =head2 Network Status Functions
6079:
6080: =over 4
6081:
6082: =item *
6083:
6084: dirlist($uri) : return directory list based on URI
6085:
6086: =item *
6087:
6088: spareserver() : find server with least workload from spare.tab
6089:
6090: =back
6091:
6092: =head2 Apache Request
6093:
6094: =over 4
6095:
6096: =item *
6097:
6098: ssi($url,%hash) : server side include, does a complete request cycle on url to
6099: localhost, posts hash
6100:
6101: =back
6102:
6103: =head2 Data to String to Data
6104:
6105: =over 4
6106:
6107: =item *
6108:
6109: hash2str(%hash) : convert a hash into a string complete with escaping and '='
6110: and '&' separators, supports elements that are arrayrefs and hashrefs
6111:
6112: =item *
6113:
6114: hashref2str($hashref) : convert a hashref into a string complete with
6115: escaping and '=' and '&' separators, supports elements that are
6116: arrayrefs and hashrefs
6117:
6118: =item *
6119:
6120: arrayref2str($arrayref) : convert an arrayref into a string complete
6121: with escaping and '&' separators, supports elements that are arrayrefs
6122: and hashrefs
6123:
6124: =item *
6125:
6126: str2hash($string) : convert string to hash using unescaping and
6127: splitting on '=' and '&', supports elements that are arrayrefs and
6128: hashrefs
6129:
6130: =item *
6131:
6132: str2array($string) : convert string to hash using unescaping and
6133: splitting on '&', supports elements that are arrayrefs and hashrefs
6134:
6135: =back
6136:
6137: =head2 Logging Routines
6138:
6139: =over 4
6140:
6141: These routines allow one to make log messages in the lonnet.log and
6142: lonnet.perm logfiles.
6143:
6144: =item *
6145:
6146: logtouch() : make sure the logfile, lonnet.log, exists
6147:
6148: =item *
6149:
6150: logthis() : append message to the normal lonnet.log file, it gets
6151: preiodically rolled over and deleted.
6152:
6153: =item *
6154:
6155: logperm() : append a permanent message to lonnet.perm.log, this log
6156: file never gets deleted by any automated portion of the system, only
6157: messages of critical importance should go in here.
6158:
6159: =back
6160:
6161: =head2 General File Helper Routines
6162:
6163: =over 4
6164:
6165: =item *
6166:
6167: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
6168: (a) files in /uploaded
6169: (i) If a local copy of the file exists -
6170: compares modification date of local copy with last-modified date for
6171: definitive version stored on home server for course. If local copy is
6172: stale, requests a new version from the home server and stores it.
6173: If the original has been removed from the home server, then local copy
6174: is unlinked.
6175: (ii) If local copy does not exist -
6176: requests the file from the home server and stores it.
6177:
6178: If $caller is 'uploadrep':
6179: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
6180: for request for files originally uploaded via DOCS.
6181: - returns 'ok' if fresh local copy now available, -1 otherwise.
6182:
6183: Otherwise:
6184: This indicates a call from the content generation phase of the request.
6185: - returns the entire contents of the file or -1.
6186:
6187: (b) files in /res
6188: - returns the entire contents of a file or -1;
6189: it properly subscribes to and replicates the file if neccessary.
6190:
6191: =item *
6192:
6193: filelocation($dir,$file) : returns file system location of a file
6194: based on URI; meant to be "fairly clean" absolute reference, $dir is a
6195: directory that relative $file lookups are to looked in ($dir of /a/dir
6196: and a file of ../bob will become /a/bob)
6197:
6198: =item *
6199:
6200: hreflocation($dir,$file) : returns file system location or a URL; same as
6201: filelocation except for hrefs
6202:
6203: =item *
6204:
6205: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
6206:
6207: =back
6208:
6209: =head2 HTTP Helper Routines
6210:
6211: =over 4
6212:
6213: =item *
6214:
6215: escape() : unpack non-word characters into CGI-compatible hex codes
6216:
6217: =item *
6218:
6219: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
6220:
6221: =back
6222:
6223: =head1 PRIVATE SUBROUTINES
6224:
6225: =head2 Underlying communication routines (Shouldn't call)
6226:
6227: =over 4
6228:
6229: =item *
6230:
6231: subreply() : tries to pass a message to lonc, returns con_lost if incapable
6232:
6233: =item *
6234:
6235: reply() : uses subreply to send a message to remote machine, logs all failures
6236:
6237: =item *
6238:
6239: critical() : passes a critical message to another server; if cannot
6240: get through then place message in connection buffer directory and
6241: returns con_delayed, if incapable of saving message, returns
6242: con_failed
6243:
6244: =item *
6245:
6246: reconlonc() : tries to reconnect lonc client processes.
6247:
6248: =back
6249:
6250: =head2 Resource Access Logging
6251:
6252: =over 4
6253:
6254: =item *
6255:
6256: flushcourselogs() : flush (save) buffer logs and access logs
6257:
6258: =item *
6259:
6260: courselog($what) : save message for course in hash
6261:
6262: =item *
6263:
6264: courseacclog($what) : save message for course using &courselog(). Perform
6265: special processing for specific resource types (problems, exams, quizzes, etc).
6266:
6267: =item *
6268:
6269: goodbye() : flush course logs and log shutting down; it is called in srm.conf
6270: as a PerlChildExitHandler
6271:
6272: =back
6273:
6274: =head2 Other
6275:
6276: =over 4
6277:
6278: =item *
6279:
6280: symblist($mapname,%newhash) : update symbolic storage links
6281:
6282: =back
6283:
6284: =cut
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