1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.618 2005/03/31 15:55:47 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonnet;
31:
32: use strict;
33: use LWP::UserAgent();
34: use HTTP::Headers;
35: use HTTP::Date;
36: # use Date::Parse;
37: use vars
38: qw(%perlvar %hostname %badServerCache %iphost %spareid %hostdom
39: %libserv %pr %prp $memcache %packagetab
40: %courselogs %accesshash %userrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf
42: %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir $_64bit);
44:
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::lonlocal;
51: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
52: use Time::HiRes qw( gettimeofday tv_interval );
53: use Cache::Memcached;
54: 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=~/^refused/) || ($answer=~/^rejected/)) {
162: &logthis("<font color=blue>WARNING:".
163: " $cmd to $server returned $answer</font>");
164: }
165: return $answer;
166: }
167:
168: # ----------------------------------------------------------- Send USR1 to lonc
169:
170: sub reconlonc {
171: my $peerfile=shift;
172: &logthis("Trying to reconnect for $peerfile");
173: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
174: if (open(my $fh,"<$loncfile")) {
175: my $loncpid=<$fh>;
176: chomp($loncpid);
177: if (kill 0 => $loncpid) {
178: &logthis("lonc at pid $loncpid responding, sending USR1");
179: kill USR1 => $loncpid;
180: sleep 1;
181: if (-e "$peerfile") { return; }
182: &logthis("$peerfile still not there, give it another try");
183: sleep 5;
184: if (-e "$peerfile") { return; }
185: &logthis(
186: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
187: } else {
188: &logthis(
189: "<font color=blue>WARNING:".
190: " lonc at pid $loncpid not responding, giving up</font>");
191: }
192: } else {
193: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
194: }
195: }
196:
197: # ------------------------------------------------------ Critical communication
198:
199: sub critical {
200: my ($cmd,$server)=@_;
201: unless ($hostname{$server}) {
202: &logthis("<font color=blue>WARNING:".
203: " Critical message to unknown server ($server)</font>");
204: return 'no_such_host';
205: }
206: my $answer=reply($cmd,$server);
207: if ($answer eq 'con_lost') {
208: &reconlonc("$perlvar{'lonSockDir'}/$server");
209: my $answer=reply($cmd,$server);
210: if ($answer eq 'con_lost') {
211: my $now=time;
212: my $middlename=$cmd;
213: $middlename=substr($middlename,0,16);
214: $middlename=~s/\W//g;
215: my $dfilename=
216: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
217: $dumpcount++;
218: {
219: my $dfh;
220: if (open($dfh,">$dfilename")) {
221: print $dfh "$cmd\n";
222: close($dfh);
223: }
224: }
225: sleep 2;
226: my $wcmd='';
227: {
228: my $dfh;
229: if (open($dfh,"<$dfilename")) {
230: $wcmd=<$dfh>;
231: close($dfh);
232: }
233: }
234: chomp($wcmd);
235: if ($wcmd eq $cmd) {
236: &logthis("<font color=blue>WARNING: ".
237: "Connection buffer $dfilename: $cmd</font>");
238: &logperm("D:$server:$cmd");
239: return 'con_delayed';
240: } else {
241: &logthis("<font color=red>CRITICAL:"
242: ." Critical connection failed: $server $cmd</font>");
243: &logperm("F:$server:$cmd");
244: return 'con_failed';
245: }
246: }
247: }
248: return $answer;
249: }
250:
251: #
252: # -------------- Remove all key from the env that start witha lowercase letter
253: # (Which is always a lon-capa value)
254:
255: sub cleanenv {
256: # unless (defined(&Apache::exists_config_define("MODPERL2"))) { return; }
257: # unless (&Apache::exists_config_define("MODPERL2")) { return; }
258: foreach my $key (keys(%ENV)) {
259: if ($key =~ /^[a-z]/) {
260: delete($ENV{$key});
261: }
262: }
263: }
264:
265: # ------------------------------------------- Transfer profile into environment
266:
267: sub transfer_profile_to_env {
268: my ($lonidsdir,$handle)=@_;
269: my @profile;
270: {
271: open(my $idf,"$lonidsdir/$handle.id");
272: flock($idf,LOCK_SH);
273: @profile=<$idf>;
274: close($idf);
275: }
276: my $envi;
277: my %Remove;
278: for ($envi=0;$envi<=$#profile;$envi++) {
279: chomp($profile[$envi]);
280: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
281: $ENV{$envname} = $envvalue;
282: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
283: if ($time < time-300) {
284: $Remove{$key}++;
285: }
286: }
287: }
288: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
289: foreach my $expired_key (keys(%Remove)) {
290: &delenv($expired_key);
291: }
292: }
293:
294: # ---------------------------------------------------------- Append Environment
295:
296: sub appenv {
297: my %newenv=@_;
298: foreach (keys %newenv) {
299: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
300: &logthis("<font color=blue>WARNING: ".
301: "Attempt to modify environment ".$_." to ".$newenv{$_}
302: .'</font>');
303: delete($newenv{$_});
304: } else {
305: $ENV{$_}=$newenv{$_};
306: }
307: }
308:
309: my $lockfh;
310: unless (open($lockfh,"$ENV{'user.environment'}")) {
311: return 'error: '.$!;
312: }
313: unless (flock($lockfh,LOCK_EX)) {
314: &logthis("<font color=blue>WARNING: ".
315: 'Could not obtain exclusive lock in appenv: '.$!);
316: close($lockfh);
317: return 'error: '.$!;
318: }
319:
320: my @oldenv;
321: {
322: my $fh;
323: unless (open($fh,"$ENV{'user.environment'}")) {
324: return 'error: '.$!;
325: }
326: @oldenv=<$fh>;
327: close($fh);
328: }
329: for (my $i=0; $i<=$#oldenv; $i++) {
330: chomp($oldenv[$i]);
331: if ($oldenv[$i] ne '') {
332: my ($name,$value)=split(/=/,$oldenv[$i]);
333: unless (defined($newenv{$name})) {
334: $newenv{$name}=$value;
335: }
336: }
337: }
338: {
339: my $fh;
340: unless (open($fh,">$ENV{'user.environment'}")) {
341: return 'error';
342: }
343: my $newname;
344: foreach $newname (keys %newenv) {
345: print $fh "$newname=$newenv{$newname}\n";
346: }
347: close($fh);
348: }
349:
350: close($lockfh);
351: return 'ok';
352: }
353: # ----------------------------------------------------- Delete from Environment
354:
355: sub delenv {
356: my $delthis=shift;
357: my %newenv=();
358: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
359: &logthis("<font color=blue>WARNING: ".
360: "Attempt to delete from environment ".$delthis);
361: return 'error';
362: }
363: my @oldenv;
364: {
365: my $fh;
366: unless (open($fh,"$ENV{'user.environment'}")) {
367: return 'error';
368: }
369: unless (flock($fh,LOCK_SH)) {
370: &logthis("<font color=blue>WARNING: ".
371: 'Could not obtain shared lock in delenv: '.$!);
372: close($fh);
373: return 'error: '.$!;
374: }
375: @oldenv=<$fh>;
376: close($fh);
377: }
378: {
379: my $fh;
380: unless (open($fh,">$ENV{'user.environment'}")) {
381: return 'error';
382: }
383: unless (flock($fh,LOCK_EX)) {
384: &logthis("<font color=blue>WARNING: ".
385: 'Could not obtain exclusive lock in delenv: '.$!);
386: close($fh);
387: return 'error: '.$!;
388: }
389: foreach (@oldenv) {
390: if ($_=~/^$delthis/) {
391: my ($key,undef) = split('=',$_);
392: delete($ENV{$key});
393: } else {
394: print $fh $_;
395: }
396: }
397: close($fh);
398: }
399: return 'ok';
400: }
401:
402: # ------------------------------------------ Find out current server userload
403: # there is a copy in lond
404: sub userload {
405: my $numusers=0;
406: {
407: opendir(LONIDS,$perlvar{'lonIDsDir'});
408: my $filename;
409: my $curtime=time;
410: while ($filename=readdir(LONIDS)) {
411: if ($filename eq '.' || $filename eq '..') {next;}
412: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
413: if ($curtime-$mtime < 1800) { $numusers++; }
414: }
415: closedir(LONIDS);
416: }
417: my $userloadpercent=0;
418: my $maxuserload=$perlvar{'lonUserLoadLim'};
419: if ($maxuserload) {
420: $userloadpercent=100*$numusers/$maxuserload;
421: }
422: $userloadpercent=sprintf("%.2f",$userloadpercent);
423: return $userloadpercent;
424: }
425:
426: # ------------------------------------------ Fight off request when overloaded
427:
428: sub overloaderror {
429: my ($r,$checkserver)=@_;
430: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
431: my $loadavg;
432: if ($checkserver eq $perlvar{'lonHostID'}) {
433: open(my $loadfile,'/proc/loadavg');
434: $loadavg=<$loadfile>;
435: $loadavg =~ s/\s.*//g;
436: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
437: close($loadfile);
438: } else {
439: $loadavg=&reply('load',$checkserver);
440: }
441: my $overload=$loadavg-100;
442: if ($overload>0) {
443: $r->err_headers_out->{'Retry-After'}=$overload;
444: $r->log_error('Overload of '.$overload.' on '.$checkserver);
445: return 413;
446: }
447: return '';
448: }
449:
450: # ------------------------------ Find server with least workload from spare.tab
451:
452: sub spareserver {
453: my ($loadpercent,$userloadpercent) = @_;
454: my $tryserver;
455: my $spareserver='';
456: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
457: my $lowestserver=$loadpercent > $userloadpercent?
458: $loadpercent : $userloadpercent;
459: foreach $tryserver (keys %spareid) {
460: my $loadans=reply('load',$tryserver);
461: my $userloadans=reply('userload',$tryserver);
462: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
463: next; #didn't get a number from the server
464: }
465: my $answer;
466: if ($loadans =~ /\d/) {
467: if ($userloadans =~ /\d/) {
468: #both are numbers, pick the bigger one
469: $answer=$loadans > $userloadans?
470: $loadans : $userloadans;
471: } else {
472: $answer = $loadans;
473: }
474: } else {
475: $answer = $userloadans;
476: }
477: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
478: $spareserver="http://$hostname{$tryserver}";
479: $lowestserver=$answer;
480: }
481: }
482: return $spareserver;
483: }
484:
485: # --------------------------------------------- Try to change a user's password
486:
487: sub changepass {
488: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
489: $currentpass = &escape($currentpass);
490: $newpass = &escape($newpass);
491: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
492: $server);
493: if (! $answer) {
494: &logthis("No reply on password change request to $server ".
495: "by $uname in domain $udom.");
496: } elsif ($answer =~ "^ok") {
497: &logthis("$uname in $udom successfully changed their password ".
498: "on $server.");
499: } elsif ($answer =~ "^pwchange_failure") {
500: &logthis("$uname in $udom was unable to change their password ".
501: "on $server. The action was blocked by either lcpasswd ".
502: "or pwchange");
503: } elsif ($answer =~ "^non_authorized") {
504: &logthis("$uname in $udom did not get their password correct when ".
505: "attempting to change it on $server.");
506: } elsif ($answer =~ "^auth_mode_error") {
507: &logthis("$uname in $udom attempted to change their password despite ".
508: "not being locally or internally authenticated on $server.");
509: } elsif ($answer =~ "^unknown_user") {
510: &logthis("$uname in $udom attempted to change their password ".
511: "on $server but were unable to because $server is not ".
512: "their home server.");
513: } elsif ($answer =~ "^refused") {
514: &logthis("$server refused to change $uname in $udom password because ".
515: "it was sent an unencrypted request to change the password.");
516: }
517: return $answer;
518: }
519:
520: # ----------------------- Try to determine user's current authentication scheme
521:
522: sub queryauthenticate {
523: my ($uname,$udom)=@_;
524: my $uhome=&homeserver($uname,$udom);
525: if (!$uhome) {
526: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
527: return 'no_host';
528: }
529: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
530: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
531: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
532: }
533: return $answer;
534: }
535:
536: # --------- Try to authenticate user from domain's lib servers (first this one)
537:
538: sub authenticate {
539: my ($uname,$upass,$udom)=@_;
540: $upass=escape($upass);
541: $uname=~s/\W//g;
542: my $uhome=&homeserver($uname,$udom);
543: if (!$uhome) {
544: &logthis("User $uname at $udom is unknown in authenticate");
545: return 'no_host';
546: }
547: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
548: if ($answer eq 'authorized') {
549: &logthis("User $uname at $udom authorized by $uhome");
550: return $uhome;
551: }
552: if ($answer eq 'non_authorized') {
553: &logthis("User $uname at $udom rejected by $uhome");
554: return 'no_host';
555: }
556: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
557: return 'no_host';
558: }
559:
560: # ---------------------- Find the homebase for a user from domain's lib servers
561:
562: my %homecache;
563: sub homeserver {
564: my ($uname,$udom,$ignoreBadCache)=@_;
565: my $index="$uname:$udom";
566:
567: if (exists($homecache{$index})) { return $homecache{$index}; }
568: my $tryserver;
569: foreach $tryserver (keys %libserv) {
570: next if ($ignoreBadCache ne 'true' &&
571: exists($badServerCache{$tryserver}));
572: if ($hostdom{$tryserver} eq $udom) {
573: my $answer=reply("home:$udom:$uname",$tryserver);
574: if ($answer eq 'found') {
575: return $homecache{$index}=$tryserver;
576: } elsif ($answer eq 'no_host') {
577: $badServerCache{$tryserver}=1;
578: }
579: }
580: }
581: return 'no_host';
582: }
583:
584: # ------------------------------------- Find the usernames behind a list of IDs
585:
586: sub idget {
587: my ($udom,@ids)=@_;
588: my %returnhash=();
589:
590: my $tryserver;
591: foreach $tryserver (keys %libserv) {
592: if ($hostdom{$tryserver} eq $udom) {
593: my $idlist=join('&',@ids);
594: $idlist=~tr/A-Z/a-z/;
595: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
596: my @answer=();
597: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
598: @answer=split(/\&/,$reply);
599: } ;
600: my $i;
601: for ($i=0;$i<=$#ids;$i++) {
602: if ($answer[$i]) {
603: $returnhash{$ids[$i]}=$answer[$i];
604: }
605: }
606: }
607: }
608: return %returnhash;
609: }
610:
611: # ------------------------------------- Find the IDs behind a list of usernames
612:
613: sub idrget {
614: my ($udom,@unames)=@_;
615: my %returnhash=();
616: foreach (@unames) {
617: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
618: }
619: return %returnhash;
620: }
621:
622: # ------------------------------- Store away a list of names and associated IDs
623:
624: sub idput {
625: my ($udom,%ids)=@_;
626: my %servers=();
627: foreach (keys %ids) {
628: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
629: my $uhom=&homeserver($_,$udom);
630: if ($uhom ne 'no_host') {
631: my $id=&escape($ids{$_});
632: $id=~tr/A-Z/a-z/;
633: my $unam=&escape($_);
634: if ($servers{$uhom}) {
635: $servers{$uhom}.='&'.$id.'='.$unam;
636: } else {
637: $servers{$uhom}=$id.'='.$unam;
638: }
639: }
640: }
641: foreach (keys %servers) {
642: &critical('idput:'.$udom.':'.$servers{$_},$_);
643: }
644: }
645:
646: # --------------------------------------------------- Assign a key to a student
647:
648: sub assign_access_key {
649: #
650: # a valid key looks like uname:udom#comments
651: # comments are being appended
652: #
653: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
654: $kdom=
655: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($kdom));
656: $knum=
657: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($knum));
658: $cdom=
659: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
660: $cnum=
661: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
662: $udom=$ENV{'user.name'} unless (defined($udom));
663: $uname=$ENV{'user.domain'} unless (defined($uname));
664: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
665: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
666: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
667: # assigned to this person
668: # - this should not happen,
669: # unless something went wrong
670: # the first time around
671: # ready to assign
672: $logentry=$1.'; '.$logentry;
673: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
674: $kdom,$knum) eq 'ok') {
675: # key now belongs to user
676: my $envkey='key.'.$cdom.'_'.$cnum;
677: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
678: &appenv('environment.'.$envkey => $ckey);
679: return 'ok';
680: } else {
681: return
682: 'error: Count not permanently assign key, will need to be re-entered later.';
683: }
684: } else {
685: return 'error: Could not assign key, try again later.';
686: }
687: } elsif (!$existing{$ckey}) {
688: # the key does not exist
689: return 'error: The key does not exist';
690: } else {
691: # the key is somebody else's
692: return 'error: The key is already in use';
693: }
694: }
695:
696: # ------------------------------------------ put an additional comment on a key
697:
698: sub comment_access_key {
699: #
700: # a valid key looks like uname:udom#comments
701: # comments are being appended
702: #
703: my ($ckey,$cdom,$cnum,$logentry)=@_;
704: $cdom=
705: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
706: $cnum=
707: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
708: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
709: if ($existing{$ckey}) {
710: $existing{$ckey}.='; '.$logentry;
711: # ready to assign
712: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
713: $cdom,$cnum) eq 'ok') {
714: return 'ok';
715: } else {
716: return 'error: Count not store comment.';
717: }
718: } else {
719: # the key does not exist
720: return 'error: The key does not exist';
721: }
722: }
723:
724: # ------------------------------------------------------ Generate a set of keys
725:
726: sub generate_access_keys {
727: my ($number,$cdom,$cnum,$logentry)=@_;
728: $cdom=
729: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
730: $cnum=
731: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
732: unless (&allowed('mky',$cdom)) { return 0; }
733: unless (($cdom) && ($cnum)) { return 0; }
734: if ($number>10000) { return 0; }
735: sleep(2); # make sure don't get same seed twice
736: srand(time()^($$+($$<<15))); # from "Programming Perl"
737: my $total=0;
738: for (my $i=1;$i<=$number;$i++) {
739: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
740: sprintf("%lx",int(100000*rand)).'-'.
741: sprintf("%lx",int(100000*rand));
742: $newkey=~s/1/g/g; # folks mix up 1 and l
743: $newkey=~s/0/h/g; # and also 0 and O
744: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
745: if ($existing{$newkey}) {
746: $i--;
747: } else {
748: if (&put('accesskeys',
749: { $newkey => '# generated '.localtime().
750: ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
751: '; '.$logentry },
752: $cdom,$cnum) eq 'ok') {
753: $total++;
754: }
755: }
756: }
757: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
758: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
759: return $total;
760: }
761:
762: # ------------------------------------------------------- Validate an accesskey
763:
764: sub validate_access_key {
765: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
766: $cdom=
767: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
768: $cnum=
769: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
770: $udom=$ENV{'user.domain'} unless (defined($udom));
771: $uname=$ENV{'user.name'} unless (defined($uname));
772: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
773: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
774: }
775:
776: # ------------------------------------- Find the section of student in a course
777:
778: sub getsection {
779: my ($udom,$unam,$courseid)=@_;
780: my $cachetime=1800;
781: $courseid=~s/\_/\//g;
782: $courseid=~s/^(\w)/\/$1/;
783:
784: my $hashid="$udom:$unam:$courseid";
785: my ($result,$cached)=&is_cached_new('getsection',$hashid);
786: if (defined($cached)) { return $result; }
787:
788: my %Pending;
789: my %Expired;
790: #
791: # Each role can either have not started yet (pending), be active,
792: # or have expired.
793: #
794: # If there is an active role, we are done.
795: #
796: # If there is more than one role which has not started yet,
797: # choose the one which will start sooner
798: # If there is one role which has not started yet, return it.
799: #
800: # If there is more than one expired role, choose the one which ended last.
801: # If there is a role which has expired, return it.
802: #
803: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
804: &homeserver($unam,$udom)))) {
805: my ($key,$value)=split(/\=/,$_);
806: $key=&unescape($key);
807: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
808: my $section=$1;
809: if ($key eq $courseid.'_st') { $section=''; }
810: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
811: my $now=time;
812: if (defined($end) && $end && ($now > $end)) {
813: $Expired{$end}=$section;
814: next;
815: }
816: if (defined($start) && $start && ($now < $start)) {
817: $Pending{$start}=$section;
818: next;
819: }
820: return &do_cache_new('getsection',$hashid,$section,$cachetime);
821: }
822: #
823: # Presumedly there will be few matching roles from the above
824: # loop and the sorting time will be negligible.
825: if (scalar(keys(%Pending))) {
826: my ($time) = sort {$a <=> $b} keys(%Pending);
827: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
828: }
829: if (scalar(keys(%Expired))) {
830: my @sorted = sort {$a <=> $b} keys(%Expired);
831: my $time = pop(@sorted);
832: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
833: }
834: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
835: }
836:
837: sub save_cache {
838: &purge_remembered();
839: }
840:
841: my $to_remember=-1;
842: my %remembered;
843: my %accessed;
844: my $kicks=0;
845: my $hits=0;
846: sub devalidate_cache_new {
847: my ($name,$id,$debug) = @_;
848: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
849: $id=&escape($name.':'.$id);
850: $memcache->delete($id);
851: delete($remembered{$id});
852: delete($accessed{$id});
853: }
854:
855: sub is_cached_new {
856: my ($name,$id,$debug) = @_;
857: $id=&escape($name.':'.$id);
858: if (exists($remembered{$id})) {
859: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
860: $accessed{$id}=[&gettimeofday()];
861: $hits++;
862: return ($remembered{$id},1);
863: }
864: my $value = $memcache->get($id);
865: if (!(defined($value))) {
866: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
867: return (undef,undef);
868: }
869: if ($value eq '__undef__') {
870: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
871: $value=undef;
872: }
873: &make_room($id,$value,$debug);
874: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
875: return ($value,1);
876: }
877:
878: sub do_cache_new {
879: my ($name,$id,$value,$time,$debug) = @_;
880: $id=&escape($name.':'.$id);
881: my $setvalue=$value;
882: if (!defined($setvalue)) {
883: $setvalue='__undef__';
884: }
885: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
886: $memcache->set($id,$setvalue,$time);
887: # need to make a copy of $value
888: #&make_room($id,$value,$debug);
889: return $value;
890: }
891:
892: sub make_room {
893: my ($id,$value,$debug)=@_;
894: $remembered{$id}=$value;
895: if ($to_remember<0) { return; }
896: $accessed{$id}=[&gettimeofday()];
897: if (scalar(keys(%remembered)) <= $to_remember) { return; }
898: my $to_kick;
899: my $max_time=0;
900: foreach my $other (keys(%accessed)) {
901: if (&tv_interval($accessed{$other}) > $max_time) {
902: $to_kick=$other;
903: $max_time=&tv_interval($accessed{$other});
904: }
905: }
906: delete($remembered{$to_kick});
907: delete($accessed{$to_kick});
908: $kicks++;
909: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
910: return;
911: }
912:
913: sub purge_remembered {
914: #&logthis("Tossing ".scalar(keys(%remembered)));
915: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
916: undef(%remembered);
917: undef(%accessed);
918: }
919: # ------------------------------------- Read an entry from a user's environment
920:
921: sub userenvironment {
922: my ($udom,$unam,@what)=@_;
923: my %returnhash=();
924: my @answer=split(/\&/,
925: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
926: &homeserver($unam,$udom)));
927: my $i;
928: for ($i=0;$i<=$#what;$i++) {
929: $returnhash{$what[$i]}=&unescape($answer[$i]);
930: }
931: return %returnhash;
932: }
933:
934: # ---------------------------------------------------------- Get a studentphoto
935: sub studentphoto {
936: my ($udom,$unam,$ext) = @_;
937: my $home=&Apache::lonnet::homeserver($unam,$udom);
938: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext",$home);
939: my $url="/uploaded/$udom/$unam/internal/studentphoto.".$ext;
940: if ($ret ne 'ok') {
941: return '/adm/lonKaputt/lonlogo_broken.gif';
942: }
943: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
944: return $tokenurl;
945: }
946:
947: # -------------------------------------------------------------------- New chat
948:
949: sub chatsend {
950: my ($newentry,$anon)=@_;
951: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
952: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
953: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
954: &reply('chatsend:'.$cdom.':'.$cnum.':'.
955: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
956: &escape($newentry)),$chome);
957: }
958:
959: # ------------------------------------------ Find current version of a resource
960:
961: sub getversion {
962: my $fname=&clutter(shift);
963: unless ($fname=~/^\/res\//) { return -1; }
964: return ¤tversion(&filelocation('',$fname));
965: }
966:
967: sub currentversion {
968: my $fname=shift;
969: my ($result,$cached)=&is_cached_new('resversion',$fname);
970: if (defined($cached)) { return $result; }
971: my $author=$fname;
972: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
973: my ($udom,$uname)=split(/\//,$author);
974: my $home=homeserver($uname,$udom);
975: if ($home eq 'no_host') {
976: return -1;
977: }
978: my $answer=reply("currentversion:$fname",$home);
979: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
980: return -1;
981: }
982: return &do_cache_new('resversion',$fname,$answer,600);
983: }
984:
985: # ----------------------------- Subscribe to a resource, return URL if possible
986:
987: sub subscribe {
988: my $fname=shift;
989: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
990: $fname=~s/[\n\r]//g;
991: my $author=$fname;
992: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
993: my ($udom,$uname)=split(/\//,$author);
994: my $home=homeserver($uname,$udom);
995: if ($home eq 'no_host') {
996: return 'not_found';
997: }
998: my $answer=reply("sub:$fname",$home);
999: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1000: $answer.=' by '.$home;
1001: }
1002: return $answer;
1003: }
1004:
1005: # -------------------------------------------------------------- Replicate file
1006:
1007: sub repcopy {
1008: my $filename=shift;
1009: $filename=~s/\/+/\//g;
1010: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1011: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1012: if ($filename=~m|^/home/httpd/html/userfiles/| or
1013: $filename=~m -^/*(uploaded|editupload)/-) {
1014: return &repcopy_userfile($filename);
1015: }
1016: $filename=~s/[\n\r]//g;
1017: my $transname="$filename.in.transfer";
1018: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1019: my $remoteurl=subscribe($filename);
1020: if ($remoteurl =~ /^con_lost by/) {
1021: &logthis("Subscribe returned $remoteurl: $filename");
1022: return 'unavailable';
1023: } elsif ($remoteurl eq 'not_found') {
1024: #&logthis("Subscribe returned not_found: $filename");
1025: return 'not_found';
1026: } elsif ($remoteurl =~ /^rejected by/) {
1027: &logthis("Subscribe returned $remoteurl: $filename");
1028: return 'forbidden';
1029: } elsif ($remoteurl eq 'directory') {
1030: return 'ok';
1031: } else {
1032: my $author=$filename;
1033: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1034: my ($udom,$uname)=split(/\//,$author);
1035: my $home=homeserver($uname,$udom);
1036: unless ($home eq $perlvar{'lonHostID'}) {
1037: my @parts=split(/\//,$filename);
1038: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1039: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1040: &logthis("Malconfiguration for replication: $filename");
1041: return 'bad_request';
1042: }
1043: my $count;
1044: for ($count=5;$count<$#parts;$count++) {
1045: $path.="/$parts[$count]";
1046: if ((-e $path)!=1) {
1047: mkdir($path,0777);
1048: }
1049: }
1050: my $ua=new LWP::UserAgent;
1051: my $request=new HTTP::Request('GET',"$remoteurl");
1052: my $response=$ua->request($request,$transname);
1053: if ($response->is_error()) {
1054: unlink($transname);
1055: my $message=$response->status_line;
1056: &logthis("<font color=blue>WARNING:"
1057: ." LWP get: $message: $filename</font>");
1058: return 'unavailable';
1059: } else {
1060: if ($remoteurl!~/\.meta$/) {
1061: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1062: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1063: if ($mresponse->is_error()) {
1064: unlink($filename.'.meta');
1065: &logthis(
1066: "<font color=yellow>INFO: No metadata: $filename</font>");
1067: }
1068: }
1069: rename($transname,$filename);
1070: return 'ok';
1071: }
1072: }
1073: }
1074: }
1075:
1076: # ------------------------------------------------ Get server side include body
1077: sub ssi_body {
1078: my ($filelink,%form)=@_;
1079: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1080: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1081: }
1082: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1083: &ssi($filelink,%form));
1084: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs;
1085: $output=~s/^.*?\<body[^\>]*\>//si;
1086: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1087: return $output;
1088: }
1089:
1090: # --------------------------------------------------------- Server Side Include
1091:
1092: sub ssi {
1093:
1094: my ($fn,%form)=@_;
1095:
1096: my $ua=new LWP::UserAgent;
1097:
1098: my $request;
1099:
1100: if (%form) {
1101: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1102: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1103: } else {
1104: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1105: }
1106:
1107: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1108: my $response=$ua->request($request);
1109:
1110: return $response->content;
1111: }
1112:
1113: sub externalssi {
1114: my ($url)=@_;
1115: my $ua=new LWP::UserAgent;
1116: my $request=new HTTP::Request('GET',$url);
1117: my $response=$ua->request($request);
1118: return $response->content;
1119: }
1120:
1121: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1122:
1123: sub allowuploaded {
1124: my ($srcurl,$url)=@_;
1125: $url=&clutter(&declutter($url));
1126: my $dir=$url;
1127: $dir=~s/\/[^\/]+$//;
1128: my %httpref=();
1129: my $httpurl=&hreflocation('',$url);
1130: $httpref{'httpref.'.$httpurl}=$srcurl;
1131: &Apache::lonnet::appenv(%httpref);
1132: }
1133:
1134: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1135: # input: action, courseID, current domain, home server for course, intended
1136: # path to file, source of file.
1137: # output: url to file (if action was uploaddoc),
1138: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1139: #
1140: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1141: # course.
1142: #
1143: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1144: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1145: # course's home server.
1146: #
1147: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1148: # be copied from $source (current location) to
1149: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1150: # and will then be copied to
1151: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1152: # course's home server.
1153: #
1154: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1155: # will be retrived from $ENV{form.uploaddoc} (from DOCS interface) to
1156: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1157: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1158: # in course's home server.
1159:
1160:
1161: sub process_coursefile {
1162: my ($action,$docuname,$docudom,$docuhome,$file,$source)=@_;
1163: my $fetchresult;
1164: if ($action eq 'propagate') {
1165: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file
1166: ,$docuhome);
1167: } else {
1168: my $fetchresult = '';
1169: my $fpath = '';
1170: my $fname = $file;
1171: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1172: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1173: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1174: unless ($fpath eq '') {
1175: my @parts=split('/',$fpath);
1176: foreach my $part (@parts) {
1177: $filepath.= '/'.$part;
1178: if ((-e $filepath)!=1) {
1179: mkdir($filepath,0777);
1180: }
1181: }
1182: }
1183: if ($action eq 'copy') {
1184: if ($source eq '') {
1185: $fetchresult = 'no source file';
1186: return $fetchresult;
1187: } else {
1188: my $destination = $filepath.'/'.$fname;
1189: rename($source,$destination);
1190: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1191: $docuhome);
1192: }
1193: } elsif ($action eq 'uploaddoc') {
1194: open(my $fh,'>'.$filepath.'/'.$fname);
1195: print $fh $ENV{'form.'.$source};
1196: close($fh);
1197: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1198: $docuhome);
1199: if ($fetchresult eq 'ok') {
1200: return '/uploaded/'.$fpath.'/'.$fname;
1201: } else {
1202: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1203: ' to host '.$docuhome.': '.$fetchresult);
1204: return '/adm/notfound.html';
1205: }
1206: }
1207: }
1208: unless ( $fetchresult eq 'ok') {
1209: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1210: ' to host '.$docuhome.': '.$fetchresult);
1211: }
1212: return $fetchresult;
1213: }
1214:
1215: sub clean_filename {
1216: my ($fname)=@_;
1217: # Replace Windows backslashes by forward slashes
1218: $fname=~s/\\/\//g;
1219: # Get rid of everything but the actual filename
1220: $fname=~s/^.*\/([^\/]+)$/$1/;
1221: # Replace spaces by underscores
1222: $fname=~s/\s+/\_/g;
1223: # Replace all other weird characters by nothing
1224: $fname=~s/[^\w\.\-]//g;
1225: # Replace all .\d. sequences with _\d. so they no longer look like version
1226: # numbers
1227: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1228: return $fname;
1229: }
1230:
1231: # --------------- Take an uploaded file and put it into the userfiles directory
1232: # input: name of form element, coursedoc=1 means this is for the course
1233: # output: url of file in userspace
1234:
1235:
1236: sub userfileupload {
1237: my ($formname,$coursedoc,$subdir)=@_;
1238: if (!defined($subdir)) { $subdir='unknown'; }
1239: my $fname=$ENV{'form.'.$formname.'.filename'};
1240: $fname=&clean_filename($fname);
1241: # See if there is anything left
1242: unless ($fname) { return 'error: no uploaded file'; }
1243: chop($ENV{'form.'.$formname});
1244: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1245: my $now = time;
1246: my $filepath = 'tmp/helprequests/'.$now;
1247: my @parts=split(/\//,$filepath);
1248: my $fullpath = $perlvar{'lonDaemons'};
1249: for (my $i=0;$i<@parts;$i++) {
1250: $fullpath .= '/'.$parts[$i];
1251: if ((-e $fullpath)!=1) {
1252: mkdir($fullpath,0777);
1253: }
1254: }
1255: open(my $fh,'>'.$fullpath.'/'.$fname);
1256: print $fh $ENV{'form.'.$formname};
1257: close($fh);
1258: return $fullpath.'/'.$fname;
1259: }
1260: # Create the directory if not present
1261: my $docuname='';
1262: my $docudom='';
1263: my $docuhome='';
1264: $fname="$subdir/$fname";
1265: if ($coursedoc) {
1266: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1267: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1268: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1269: if ($ENV{'form.folder'} =~ m/^default/) {
1270: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1271: } else {
1272: $fname=$ENV{'form.folder'}.'/'.$fname;
1273: return &process_coursefile('uploaddoc',$docuname,$docudom,$docuhome,$fname,$formname);
1274: }
1275: } else {
1276: $docuname=$ENV{'user.name'};
1277: $docudom=$ENV{'user.domain'};
1278: $docuhome=$ENV{'user.home'};
1279: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1280: }
1281: }
1282:
1283: sub finishuserfileupload {
1284: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1285: my $path=$docudom.'/'.$docuname.'/';
1286: my $filepath=$perlvar{'lonDocRoot'};
1287: my ($fnamepath,$file);
1288: $file=$fname;
1289: if ($fname=~m|/|) {
1290: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1291: $path.=$fnamepath.'/';
1292: }
1293: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1294: my $count;
1295: for ($count=4;$count<=$#parts;$count++) {
1296: $filepath.="/$parts[$count]";
1297: if ((-e $filepath)!=1) {
1298: mkdir($filepath,0777);
1299: }
1300: }
1301: # Save the file
1302: {
1303: open(FH,'>'.$filepath.'/'.$file);
1304: print FH $ENV{'form.'.$formname};
1305: close(FH);
1306: }
1307: # Notify homeserver to grep it
1308: #
1309: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1310: if ($fetchresult eq 'ok') {
1311: #
1312: # Return the URL to it
1313: return '/uploaded/'.$path.$file;
1314: } else {
1315: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1316: ': '.$fetchresult);
1317: return '/adm/notfound.html';
1318: }
1319: }
1320:
1321: sub removeuploadedurl {
1322: my ($url)=@_;
1323: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1324: return &removeuserfile($uname,$udom,$fname);
1325: }
1326:
1327: sub removeuserfile {
1328: my ($docuname,$docudom,$fname)=@_;
1329: my $home=&homeserver($docuname,$docudom);
1330: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1331: }
1332:
1333: sub mkdiruserfile {
1334: my ($docuname,$docudom,$dir)=@_;
1335: my $home=&homeserver($docuname,$docudom);
1336: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1337: }
1338:
1339: sub renameuserfile {
1340: my ($docuname,$docudom,$old,$new)=@_;
1341: my $home=&homeserver($docuname,$docudom);
1342: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1343: &escape("$new"),$home);
1344: }
1345:
1346: # ------------------------------------------------------------------------- Log
1347:
1348: sub log {
1349: my ($dom,$nam,$hom,$what)=@_;
1350: return critical("log:$dom:$nam:$what",$hom);
1351: }
1352:
1353: # ------------------------------------------------------------------ Course Log
1354: #
1355: # This routine flushes several buffers of non-mission-critical nature
1356: #
1357:
1358: sub flushcourselogs {
1359: &logthis('Flushing log buffers');
1360: #
1361: # course logs
1362: # This is a log of all transactions in a course, which can be used
1363: # for data mining purposes
1364: #
1365: # It also collects the courseid database, which lists last transaction
1366: # times and course titles for all courseids
1367: #
1368: my %courseidbuffer=();
1369: foreach (keys %courselogs) {
1370: my $crsid=$_;
1371: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1372: &escape($courselogs{$crsid}),
1373: $coursehombuf{$crsid}) eq 'ok') {
1374: delete $courselogs{$crsid};
1375: } else {
1376: &logthis('Failed to flush log buffer for '.$crsid);
1377: if (length($courselogs{$crsid})>40000) {
1378: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1379: " exceeded maximum size, deleting.</font>");
1380: delete $courselogs{$crsid};
1381: }
1382: }
1383: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1384: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1385: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1386: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1387: } else {
1388: $courseidbuffer{$coursehombuf{$crsid}}=
1389: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1390: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1391: }
1392: }
1393: #
1394: # Write course id database (reverse lookup) to homeserver of courses
1395: # Is used in pickcourse
1396: #
1397: foreach (keys %courseidbuffer) {
1398: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1399: }
1400: #
1401: # File accesses
1402: # Writes to the dynamic metadata of resources to get hit counts, etc.
1403: #
1404: foreach my $entry (keys(%accesshash)) {
1405: if ($entry =~ /___count$/) {
1406: my ($dom,$name);
1407: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1408: if (! defined($dom) || $dom eq '' ||
1409: ! defined($name) || $name eq '') {
1410: my $cid = $ENV{'request.course.id'};
1411: $dom = $ENV{'request.'.$cid.'.domain'};
1412: $name = $ENV{'request.'.$cid.'.num'};
1413: }
1414: my $value = $accesshash{$entry};
1415: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1416: my %temphash=($url => $value);
1417: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1418: if ($result eq 'ok') {
1419: delete $accesshash{$entry};
1420: } elsif ($result eq 'unknown_cmd') {
1421: # Target server has old code running on it.
1422: my %temphash=($entry => $value);
1423: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1424: delete $accesshash{$entry};
1425: }
1426: }
1427: } else {
1428: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1429: my %temphash=($entry => $accesshash{$entry});
1430: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1431: delete $accesshash{$entry};
1432: }
1433: }
1434: }
1435: #
1436: # Roles
1437: # Reverse lookup of user roles for course faculty/staff and co-authorship
1438: #
1439: foreach (keys %userrolehash) {
1440: my $entry=$_;
1441: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1442: split(/\:/,$entry);
1443: if (&Apache::lonnet::put('nohist_userroles',
1444: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1445: $rudom,$runame) eq 'ok') {
1446: delete $userrolehash{$entry};
1447: }
1448: }
1449: $dumpcount++;
1450: }
1451:
1452: sub courselog {
1453: my $what=shift;
1454: $what=time.':'.$what;
1455: unless ($ENV{'request.course.id'}) { return ''; }
1456: $coursedombuf{$ENV{'request.course.id'}}=
1457: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1458: $coursenumbuf{$ENV{'request.course.id'}}=
1459: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1460: $coursehombuf{$ENV{'request.course.id'}}=
1461: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1462: $coursedescrbuf{$ENV{'request.course.id'}}=
1463: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1464: $courseinstcodebuf{$ENV{'request.course.id'}}=
1465: $ENV{'course.'.$ENV{'request.course.id'}.'.internal.coursecode'};
1466: $courseownerbuf{$ENV{'request.course.id'}}=
1467: $ENV{'course.'.$ENV{'request.course.id'}.'.internal.courseowner'};
1468: if (defined $courselogs{$ENV{'request.course.id'}}) {
1469: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1470: } else {
1471: $courselogs{$ENV{'request.course.id'}}.=$what;
1472: }
1473: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1474: &flushcourselogs();
1475: }
1476: }
1477:
1478: sub courseacclog {
1479: my $fnsymb=shift;
1480: unless ($ENV{'request.course.id'}) { return ''; }
1481: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1482: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1483: $what.=':POST';
1484: # FIXME: Probably ought to escape things....
1485: foreach (keys %ENV) {
1486: if ($_=~/^form\.(.*)/) {
1487: $what.=':'.$1.'='.$ENV{$_};
1488: }
1489: }
1490: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1491: # FIXME: We should not be depending on a form parameter that someone
1492: # editing lonsearchcat.pm might change in the future.
1493: if ($ENV{'form.phase'} eq 'course_search') {
1494: $what.= ':POST';
1495: # FIXME: Probably ought to escape things....
1496: foreach my $element ('courseexp','crsfulltext','crsrelated',
1497: 'crsdiscuss') {
1498: $what.=':'.$element.'='.$ENV{'form.'.$element};
1499: }
1500: }
1501: }
1502: &courselog($what);
1503: }
1504:
1505: sub countacc {
1506: my $url=&declutter(shift);
1507: return if (! defined($url) || $url eq '');
1508: unless ($ENV{'request.course.id'}) { return ''; }
1509: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1510: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1511: $accesshash{$key}++;
1512: }
1513:
1514: sub linklog {
1515: my ($from,$to)=@_;
1516: $from=&declutter($from);
1517: $to=&declutter($to);
1518: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1519: $accesshash{$to.'___'.$from.'___goto'}=1;
1520: }
1521:
1522: sub userrolelog {
1523: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1524: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1525: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1526: ($trole=~/^cr/) || ($trole=~/^ta/)) {
1527: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1528: $userrolehash
1529: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1530: =$tend.':'.$tstart;
1531: }
1532: }
1533:
1534: sub get_course_adv_roles {
1535: my $cid=shift;
1536: $cid=$ENV{'request.course.id'} unless (defined($cid));
1537: my %coursehash=&coursedescription($cid);
1538: my %nothide=();
1539: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1540: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1541: }
1542: my %returnhash=();
1543: my %dumphash=
1544: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1545: my $now=time;
1546: foreach (keys %dumphash) {
1547: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1548: if (($tstart) && ($tstart<0)) { next; }
1549: if (($tend) && ($tend<$now)) { next; }
1550: if (($tstart) && ($now<$tstart)) { next; }
1551: my ($role,$username,$domain,$section)=split(/\:/,$_);
1552: if ($username eq '' || $domain eq '') { next; }
1553: if ((&privileged($username,$domain)) &&
1554: (!$nothide{$username.':'.$domain})) { next; }
1555: my $key=&plaintext($role);
1556: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1557: if ($returnhash{$key}) {
1558: $returnhash{$key}.=','.$username.':'.$domain;
1559: } else {
1560: $returnhash{$key}=$username.':'.$domain;
1561: }
1562: }
1563: return %returnhash;
1564: }
1565:
1566: sub get_my_roles {
1567: my ($uname,$udom)=@_;
1568: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1569: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1570: my %dumphash=
1571: &dump('nohist_userroles',$udom,$uname);
1572: my %returnhash=();
1573: my $now=time;
1574: foreach (keys %dumphash) {
1575: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1576: if (($tstart) && ($tstart<0)) { next; }
1577: if (($tend) && ($tend<$now)) { next; }
1578: if (($tstart) && ($now<$tstart)) { next; }
1579: my ($role,$username,$domain,$section)=split(/\:/,$_);
1580: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1581: }
1582: return %returnhash;
1583: }
1584:
1585: # ----------------------------------------------------- Frontpage Announcements
1586: #
1587: #
1588:
1589: sub postannounce {
1590: my ($server,$text)=@_;
1591: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1592: unless ($text=~/\w/) { $text=''; }
1593: return &reply('setannounce:'.&escape($text),$server);
1594: }
1595:
1596: sub getannounce {
1597:
1598: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1599: my $announcement='';
1600: while (<$fh>) { $announcement .=$_; }
1601: close($fh);
1602: if ($announcement=~/\w/) {
1603: return
1604: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1605: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1606: } else {
1607: return '';
1608: }
1609: } else {
1610: return '';
1611: }
1612: }
1613:
1614: # ---------------------------------------------------------- Course ID routines
1615: # Deal with domain's nohist_courseid.db files
1616: #
1617:
1618: sub courseidput {
1619: my ($domain,$what,$coursehome)=@_;
1620: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1621: }
1622:
1623: sub courseiddump {
1624: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$hostidflag,$hostidref)=@_;
1625: my %returnhash=();
1626: unless ($domfilter) { $domfilter=''; }
1627: foreach my $tryserver (keys %libserv) {
1628: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1629: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1630: foreach (
1631: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1632: $sincefilter.':'.&escape($descfilter).':'.
1633: &escape($instcodefilter).':'.&escape($ownerfilter),
1634: $tryserver))) {
1635: my ($key,$value)=split(/\=/,$_);
1636: if (($key) && ($value)) {
1637: $returnhash{&unescape($key)}=$value;
1638: }
1639: }
1640: }
1641: }
1642: }
1643: return %returnhash;
1644: }
1645:
1646: #
1647: # ----------------------------------------------------------- Check out an item
1648:
1649: sub get_first_access {
1650: my ($type,$argsymb)=@_;
1651: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1652: if ($argsymb) { $symb=$argsymb; }
1653: my ($map,$id,$res)=&decode_symb($symb);
1654: if ($type eq 'map') {
1655: $res=&symbread($map);
1656: } else {
1657: $res=$symb;
1658: }
1659: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
1660: return $times{"$courseid\0$res"};
1661: }
1662:
1663: sub set_first_access {
1664: my ($type)=@_;
1665: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1666: my ($map,$id,$res)=&decode_symb($symb);
1667: if ($type eq 'map') {
1668: $res=&symbread($map);
1669: } else {
1670: $res=$symb;
1671: }
1672: my $firstaccess=&get_first_access($type,$symb);
1673: if (!$firstaccess) {
1674: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
1675: }
1676: return 'already_set';
1677: }
1678:
1679: sub checkout {
1680: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1681: my $now=time;
1682: my $lonhost=$perlvar{'lonHostID'};
1683: my $infostr=&escape(
1684: 'CHECKOUTTOKEN&'.
1685: $tuname.'&'.
1686: $tudom.'&'.
1687: $tcrsid.'&'.
1688: $symb.'&'.
1689: $now.'&'.$ENV{'REMOTE_ADDR'});
1690: my $token=&reply('tmpput:'.$infostr,$lonhost);
1691: if ($token=~/^error\:/) {
1692: &logthis("<font color=blue>WARNING: ".
1693: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1694: "</font>");
1695: return '';
1696: }
1697:
1698: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1699: $token=~tr/a-z/A-Z/;
1700:
1701: my %infohash=('resource.0.outtoken' => $token,
1702: 'resource.0.checkouttime' => $now,
1703: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1704:
1705: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1706: return '';
1707: } else {
1708: &logthis("<font color=blue>WARNING: ".
1709: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1710: "</font>");
1711: }
1712:
1713: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1714: &escape('Checkout '.$infostr.' - '.
1715: $token)) ne 'ok') {
1716: return '';
1717: } else {
1718: &logthis("<font color=blue>WARNING: ".
1719: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1720: "</font>");
1721: }
1722: return $token;
1723: }
1724:
1725: # ------------------------------------------------------------ Check in an item
1726:
1727: sub checkin {
1728: my $token=shift;
1729: my $now=time;
1730: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1731: $lonhost=~tr/A-Z/a-z/;
1732: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
1733: $dtoken=~s/\W/\_/g;
1734: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1735: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1736:
1737: unless (($tuname) && ($tudom)) {
1738: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1739: return '';
1740: }
1741:
1742: unless (&allowed('mgr',$tcrsid)) {
1743: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1744: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1745: return '';
1746: }
1747:
1748: my %infohash=('resource.0.intoken' => $token,
1749: 'resource.0.checkintime' => $now,
1750: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1751:
1752: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1753: return '';
1754: }
1755:
1756: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1757: &escape('Checkin - '.$token)) ne 'ok') {
1758: return '';
1759: }
1760:
1761: return ($symb,$tuname,$tudom,$tcrsid);
1762: }
1763:
1764: # --------------------------------------------- Set Expire Date for Spreadsheet
1765:
1766: sub expirespread {
1767: my ($uname,$udom,$stype,$usymb)=@_;
1768: my $cid=$ENV{'request.course.id'};
1769: if ($cid) {
1770: my $now=time;
1771: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1772: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1773: $ENV{'course.'.$cid.'.num'}.
1774: ':nohist_expirationdates:'.
1775: &escape($key).'='.$now,
1776: $ENV{'course.'.$cid.'.home'})
1777: }
1778: return 'ok';
1779: }
1780:
1781: # ----------------------------------------------------- Devalidate Spreadsheets
1782:
1783: sub devalidate {
1784: my ($symb,$uname,$udom)=@_;
1785: my $cid=$ENV{'request.course.id'};
1786: if ($cid) {
1787: # delete the stored spreadsheets for
1788: # - the student level sheet of this user in course's homespace
1789: # - the assessment level sheet for this resource
1790: # for this user in user's homespace
1791: # - current conditional state info
1792: my $key=$uname.':'.$udom.':';
1793: my $status=
1794: &del('nohist_calculatedsheets',
1795: [$key.'studentcalc:'],
1796: $ENV{'course.'.$cid.'.domain'},
1797: $ENV{'course.'.$cid.'.num'})
1798: .' '.
1799: &del('nohist_calculatedsheets_'.$cid,
1800: [$key.'assesscalc:'.$symb],$udom,$uname);
1801: unless ($status eq 'ok ok') {
1802: &logthis('Could not devalidate spreadsheet '.
1803: $uname.' at '.$udom.' for '.
1804: $symb.': '.$status);
1805: }
1806: &delenv('user.state.'.$cid);
1807: }
1808: }
1809:
1810: sub get_scalar {
1811: my ($string,$end) = @_;
1812: my $value;
1813: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1814: $value = $1;
1815: } elsif ($$string =~ s/^([^&]*?)&//) {
1816: $value = $1;
1817: }
1818: return &unescape($value);
1819: }
1820:
1821: sub array2str {
1822: my (@array) = @_;
1823: my $result=&arrayref2str(\@array);
1824: $result=~s/^__ARRAY_REF__//;
1825: $result=~s/__END_ARRAY_REF__$//;
1826: return $result;
1827: }
1828:
1829: sub arrayref2str {
1830: my ($arrayref) = @_;
1831: my $result='__ARRAY_REF__';
1832: foreach my $elem (@$arrayref) {
1833: if(ref($elem) eq 'ARRAY') {
1834: $result.=&arrayref2str($elem).'&';
1835: } elsif(ref($elem) eq 'HASH') {
1836: $result.=&hashref2str($elem).'&';
1837: } elsif(ref($elem)) {
1838: #print("Got a ref of ".(ref($elem))." skipping.");
1839: } else {
1840: $result.=&escape($elem).'&';
1841: }
1842: }
1843: $result=~s/\&$//;
1844: $result .= '__END_ARRAY_REF__';
1845: return $result;
1846: }
1847:
1848: sub hash2str {
1849: my (%hash) = @_;
1850: my $result=&hashref2str(\%hash);
1851: $result=~s/^__HASH_REF__//;
1852: $result=~s/__END_HASH_REF__$//;
1853: return $result;
1854: }
1855:
1856: sub hashref2str {
1857: my ($hashref)=@_;
1858: my $result='__HASH_REF__';
1859: foreach (sort(keys(%$hashref))) {
1860: if (ref($_) eq 'ARRAY') {
1861: $result.=&arrayref2str($_).'=';
1862: } elsif (ref($_) eq 'HASH') {
1863: $result.=&hashref2str($_).'=';
1864: } elsif (ref($_)) {
1865: $result.='=';
1866: #print("Got a ref of ".(ref($_))." skipping.");
1867: } else {
1868: if ($_) {$result.=&escape($_).'=';} else { last; }
1869: }
1870:
1871: if(ref($hashref->{$_}) eq 'ARRAY') {
1872: $result.=&arrayref2str($hashref->{$_}).'&';
1873: } elsif(ref($hashref->{$_}) eq 'HASH') {
1874: $result.=&hashref2str($hashref->{$_}).'&';
1875: } elsif(ref($hashref->{$_})) {
1876: $result.='&';
1877: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1878: } else {
1879: $result.=&escape($hashref->{$_}).'&';
1880: }
1881: }
1882: $result=~s/\&$//;
1883: $result .= '__END_HASH_REF__';
1884: return $result;
1885: }
1886:
1887: sub str2hash {
1888: my ($string)=@_;
1889: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1890: return %$hash;
1891: }
1892:
1893: sub str2hashref {
1894: my ($string) = @_;
1895:
1896: my %hash;
1897:
1898: if($string !~ /^__HASH_REF__/) {
1899: if (! ($string eq '' || !defined($string))) {
1900: $hash{'error'}='Not hash reference';
1901: }
1902: return (\%hash, $string);
1903: }
1904:
1905: $string =~ s/^__HASH_REF__//;
1906:
1907: while($string !~ /^__END_HASH_REF__/) {
1908: #key
1909: my $key='';
1910: if($string =~ /^__HASH_REF__/) {
1911: ($key, $string)=&str2hashref($string);
1912: if(defined($key->{'error'})) {
1913: $hash{'error'}='Bad data';
1914: return (\%hash, $string);
1915: }
1916: } elsif($string =~ /^__ARRAY_REF__/) {
1917: ($key, $string)=&str2arrayref($string);
1918: if($key->[0] eq 'Array reference error') {
1919: $hash{'error'}='Bad data';
1920: return (\%hash, $string);
1921: }
1922: } else {
1923: $string =~ s/^(.*?)=//;
1924: $key=&unescape($1);
1925: }
1926: $string =~ s/^=//;
1927:
1928: #value
1929: my $value='';
1930: if($string =~ /^__HASH_REF__/) {
1931: ($value, $string)=&str2hashref($string);
1932: if(defined($value->{'error'})) {
1933: $hash{'error'}='Bad data';
1934: return (\%hash, $string);
1935: }
1936: } elsif($string =~ /^__ARRAY_REF__/) {
1937: ($value, $string)=&str2arrayref($string);
1938: if($value->[0] eq 'Array reference error') {
1939: $hash{'error'}='Bad data';
1940: return (\%hash, $string);
1941: }
1942: } else {
1943: $value=&get_scalar(\$string,'__END_HASH_REF__');
1944: }
1945: $string =~ s/^&//;
1946:
1947: $hash{$key}=$value;
1948: }
1949:
1950: $string =~ s/^__END_HASH_REF__//;
1951:
1952: return (\%hash, $string);
1953: }
1954:
1955: sub str2array {
1956: my ($string)=@_;
1957: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1958: return @$array;
1959: }
1960:
1961: sub str2arrayref {
1962: my ($string) = @_;
1963: my @array;
1964:
1965: if($string !~ /^__ARRAY_REF__/) {
1966: if (! ($string eq '' || !defined($string))) {
1967: $array[0]='Array reference error';
1968: }
1969: return (\@array, $string);
1970: }
1971:
1972: $string =~ s/^__ARRAY_REF__//;
1973:
1974: while($string !~ /^__END_ARRAY_REF__/) {
1975: my $value='';
1976: if($string =~ /^__HASH_REF__/) {
1977: ($value, $string)=&str2hashref($string);
1978: if(defined($value->{'error'})) {
1979: $array[0] ='Array reference error';
1980: return (\@array, $string);
1981: }
1982: } elsif($string =~ /^__ARRAY_REF__/) {
1983: ($value, $string)=&str2arrayref($string);
1984: if($value->[0] eq 'Array reference error') {
1985: $array[0] ='Array reference error';
1986: return (\@array, $string);
1987: }
1988: } else {
1989: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1990: }
1991: $string =~ s/^&//;
1992:
1993: push(@array, $value);
1994: }
1995:
1996: $string =~ s/^__END_ARRAY_REF__//;
1997:
1998: return (\@array, $string);
1999: }
2000:
2001: # -------------------------------------------------------------------Temp Store
2002:
2003: sub tmpreset {
2004: my ($symb,$namespace,$domain,$stuname) = @_;
2005: if (!$symb) {
2006: $symb=&symbread();
2007: if (!$symb) { $symb= $ENV{'request.url'}; }
2008: }
2009: $symb=escape($symb);
2010:
2011: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2012: $namespace=~s/\//\_/g;
2013: $namespace=~s/\W//g;
2014:
2015: if (!$domain) { $domain=$ENV{'user.domain'}; }
2016: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2017: if ($domain eq 'public' && $stuname eq 'public') {
2018: $stuname=$ENV{'REMOTE_ADDR'};
2019: }
2020: my $path=$perlvar{'lonDaemons'}.'/tmp';
2021: my %hash;
2022: if (tie(%hash,'GDBM_File',
2023: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2024: &GDBM_WRCREAT(),0640)) {
2025: foreach my $key (keys %hash) {
2026: if ($key=~ /:$symb/) {
2027: delete($hash{$key});
2028: }
2029: }
2030: }
2031: }
2032:
2033: sub tmpstore {
2034: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2035:
2036: if (!$symb) {
2037: $symb=&symbread();
2038: if (!$symb) { $symb= $ENV{'request.url'}; }
2039: }
2040: $symb=escape($symb);
2041:
2042: if (!$namespace) {
2043: # I don't think we would ever want to store this for a course.
2044: # it seems this will only be used if we don't have a course.
2045: #$namespace=$ENV{'request.course.id'};
2046: #if (!$namespace) {
2047: $namespace=$ENV{'request.state'};
2048: #}
2049: }
2050: $namespace=~s/\//\_/g;
2051: $namespace=~s/\W//g;
2052: if (!$domain) { $domain=$ENV{'user.domain'}; }
2053: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2054: if ($domain eq 'public' && $stuname eq 'public') {
2055: $stuname=$ENV{'REMOTE_ADDR'};
2056: }
2057: my $now=time;
2058: my %hash;
2059: my $path=$perlvar{'lonDaemons'}.'/tmp';
2060: if (tie(%hash,'GDBM_File',
2061: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2062: &GDBM_WRCREAT(),0640)) {
2063: $hash{"version:$symb"}++;
2064: my $version=$hash{"version:$symb"};
2065: my $allkeys='';
2066: foreach my $key (keys(%$storehash)) {
2067: $allkeys.=$key.':';
2068: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2069: }
2070: $hash{"$version:$symb:timestamp"}=$now;
2071: $allkeys.='timestamp';
2072: $hash{"$version:keys:$symb"}=$allkeys;
2073: if (untie(%hash)) {
2074: return 'ok';
2075: } else {
2076: return "error:$!";
2077: }
2078: } else {
2079: return "error:$!";
2080: }
2081: }
2082:
2083: # -----------------------------------------------------------------Temp Restore
2084:
2085: sub tmprestore {
2086: my ($symb,$namespace,$domain,$stuname) = @_;
2087:
2088: if (!$symb) {
2089: $symb=&symbread();
2090: if (!$symb) { $symb= $ENV{'request.url'}; }
2091: }
2092: $symb=escape($symb);
2093:
2094: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2095:
2096: if (!$domain) { $domain=$ENV{'user.domain'}; }
2097: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2098: if ($domain eq 'public' && $stuname eq 'public') {
2099: $stuname=$ENV{'REMOTE_ADDR'};
2100: }
2101: my %returnhash;
2102: $namespace=~s/\//\_/g;
2103: $namespace=~s/\W//g;
2104: my %hash;
2105: my $path=$perlvar{'lonDaemons'}.'/tmp';
2106: if (tie(%hash,'GDBM_File',
2107: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2108: &GDBM_READER(),0640)) {
2109: my $version=$hash{"version:$symb"};
2110: $returnhash{'version'}=$version;
2111: my $scope;
2112: for ($scope=1;$scope<=$version;$scope++) {
2113: my $vkeys=$hash{"$scope:keys:$symb"};
2114: my @keys=split(/:/,$vkeys);
2115: my $key;
2116: $returnhash{"$scope:keys"}=$vkeys;
2117: foreach $key (@keys) {
2118: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2119: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2120: }
2121: }
2122: if (!(untie(%hash))) {
2123: return "error:$!";
2124: }
2125: } else {
2126: return "error:$!";
2127: }
2128: return %returnhash;
2129: }
2130:
2131: # ----------------------------------------------------------------------- Store
2132:
2133: sub store {
2134: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2135: my $home='';
2136:
2137: if ($stuname) { $home=&homeserver($stuname,$domain); }
2138:
2139: $symb=&symbclean($symb);
2140: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2141:
2142: if (!$domain) { $domain=$ENV{'user.domain'}; }
2143: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2144:
2145: &devalidate($symb,$stuname,$domain);
2146:
2147: $symb=escape($symb);
2148: if (!$namespace) {
2149: unless ($namespace=$ENV{'request.course.id'}) {
2150: return '';
2151: }
2152: }
2153: if (!$home) { $home=$ENV{'user.home'}; }
2154:
2155: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2156: $$storehash{'host'}=$perlvar{'lonHostID'};
2157:
2158: my $namevalue='';
2159: foreach (keys %$storehash) {
2160: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2161: }
2162: $namevalue=~s/\&$//;
2163: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2164: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2165: }
2166:
2167: # -------------------------------------------------------------- Critical Store
2168:
2169: sub cstore {
2170: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2171: my $home='';
2172:
2173: if ($stuname) { $home=&homeserver($stuname,$domain); }
2174:
2175: $symb=&symbclean($symb);
2176: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2177:
2178: if (!$domain) { $domain=$ENV{'user.domain'}; }
2179: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2180:
2181: &devalidate($symb,$stuname,$domain);
2182:
2183: $symb=escape($symb);
2184: if (!$namespace) {
2185: unless ($namespace=$ENV{'request.course.id'}) {
2186: return '';
2187: }
2188: }
2189: if (!$home) { $home=$ENV{'user.home'}; }
2190:
2191: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2192: $$storehash{'host'}=$perlvar{'lonHostID'};
2193:
2194: my $namevalue='';
2195: foreach (keys %$storehash) {
2196: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2197: }
2198: $namevalue=~s/\&$//;
2199: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2200: return critical
2201: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2202: }
2203:
2204: # --------------------------------------------------------------------- Restore
2205:
2206: sub restore {
2207: my ($symb,$namespace,$domain,$stuname) = @_;
2208: my $home='';
2209:
2210: if ($stuname) { $home=&homeserver($stuname,$domain); }
2211:
2212: if (!$symb) {
2213: unless ($symb=escape(&symbread())) { return ''; }
2214: } else {
2215: $symb=&escape(&symbclean($symb));
2216: }
2217: if (!$namespace) {
2218: unless ($namespace=$ENV{'request.course.id'}) {
2219: return '';
2220: }
2221: }
2222: if (!$domain) { $domain=$ENV{'user.domain'}; }
2223: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2224: if (!$home) { $home=$ENV{'user.home'}; }
2225: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2226:
2227: my %returnhash=();
2228: foreach (split(/\&/,$answer)) {
2229: my ($name,$value)=split(/\=/,$_);
2230: $returnhash{&unescape($name)}=&thaw_unescape($value);
2231: }
2232: my $version;
2233: for ($version=1;$version<=$returnhash{'version'};$version++) {
2234: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2235: $returnhash{$_}=$returnhash{$version.':'.$_};
2236: }
2237: }
2238: return %returnhash;
2239: }
2240:
2241: # ---------------------------------------------------------- Course Description
2242:
2243: sub coursedescription {
2244: my $courseid=shift;
2245: $courseid=~s/^\///;
2246: $courseid=~s/\_/\//g;
2247: my ($cdomain,$cnum)=split(/\//,$courseid);
2248: my $chome=&homeserver($cnum,$cdomain);
2249: my $normalid=$cdomain.'_'.$cnum;
2250: # need to always cache even if we get errors otherwise we keep
2251: # trying and trying and trying to get the course description.
2252: my %envhash=();
2253: my %returnhash=();
2254: $envhash{'course.'.$normalid.'.last_cache'}=time;
2255: if ($chome ne 'no_host') {
2256: %returnhash=&dump('environment',$cdomain,$cnum);
2257: if (!exists($returnhash{'con_lost'})) {
2258: $returnhash{'home'}= $chome;
2259: $returnhash{'domain'} = $cdomain;
2260: $returnhash{'num'} = $cnum;
2261: while (my ($name,$value) = each %returnhash) {
2262: $envhash{'course.'.$normalid.'.'.$name}=$value;
2263: }
2264: $returnhash{'url'}=&clutter($returnhash{'url'});
2265: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2266: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
2267: $envhash{'course.'.$normalid.'.home'}=$chome;
2268: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2269: $envhash{'course.'.$normalid.'.num'}=$cnum;
2270: }
2271: }
2272: &appenv(%envhash);
2273: return %returnhash;
2274: }
2275:
2276: # -------------------------------------------------See if a user is privileged
2277:
2278: sub privileged {
2279: my ($username,$domain)=@_;
2280: my $rolesdump=&reply("dump:$domain:$username:roles",
2281: &homeserver($username,$domain));
2282: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2283: my $now=time;
2284: if ($rolesdump ne '') {
2285: foreach (split(/&/,$rolesdump)) {
2286: if ($_!~/^rolesdef_/) {
2287: my ($area,$role)=split(/=/,$_);
2288: $area=~s/\_\w\w$//;
2289: my ($trole,$tend,$tstart)=split(/_/,$role);
2290: if (($trole eq 'dc') || ($trole eq 'su')) {
2291: my $active=1;
2292: if ($tend) {
2293: if ($tend<$now) { $active=0; }
2294: }
2295: if ($tstart) {
2296: if ($tstart>$now) { $active=0; }
2297: }
2298: if ($active) { return 1; }
2299: }
2300: }
2301: }
2302: }
2303: return 0;
2304: }
2305:
2306: # -------------------------------------------------------- Get user privileges
2307:
2308: sub rolesinit {
2309: my ($domain,$username,$authhost)=@_;
2310: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2311: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2312: my %allroles=();
2313: my $now=time;
2314: my $userroles="user.login.time=$now\n";
2315:
2316: if ($rolesdump ne '') {
2317: foreach (split(/&/,$rolesdump)) {
2318: if ($_!~/^rolesdef_/) {
2319: my ($area,$role)=split(/=/,$_);
2320: $area=~s/\_\w\w$//;
2321:
2322: my ($trole,$tend,$tstart);
2323: if ($role=~/^cr/) {
2324: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2325: ($tend,$tstart)=split('_',$trest);
2326: } else {
2327: ($trole,$tend,$tstart)=split(/_/,$role);
2328: }
2329: $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username);
2330: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2331: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2332: if (($area ne '') && ($trole ne '')) {
2333: my $spec=$trole.'.'.$area;
2334: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2335: if ($trole =~ /^cr\//) {
2336: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2337: } else {
2338: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2339: }
2340: }
2341: }
2342: }
2343: my ($author,$adv) = &set_userprivs(\$userroles,\%allroles);
2344: $userroles.='user.adv='.$adv."\n".
2345: 'user.author='.$author."\n";
2346: $ENV{'user.adv'}=$adv;
2347: }
2348: return $userroles;
2349: }
2350:
2351: sub set_arearole {
2352: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2353: # log the associated role with the area
2354: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2355: return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
2356: }
2357:
2358: sub custom_roleprivs {
2359: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2360: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2361: my $homsvr=homeserver($rauthor,$rdomain);
2362: if ($hostname{$homsvr} ne '') {
2363: my ($rdummy,$roledef)=
2364: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2365: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2366: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2367: if (defined($syspriv)) {
2368: $$allroles{'cm./'}.=':'.$syspriv;
2369: $$allroles{$spec.'./'}.=':'.$syspriv;
2370: }
2371: if ($tdomain ne '') {
2372: if (defined($dompriv)) {
2373: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2374: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2375: }
2376: if (($trest ne '') && (defined($coursepriv))) {
2377: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2378: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2379: }
2380: }
2381: }
2382: }
2383: }
2384:
2385:
2386: sub standard_roleprivs {
2387: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2388: if (defined($pr{$trole.':s'})) {
2389: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2390: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2391: }
2392: if ($tdomain ne '') {
2393: if (defined($pr{$trole.':d'})) {
2394: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2395: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2396: }
2397: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2398: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2399: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2400: }
2401: }
2402: }
2403:
2404: sub set_userprivs {
2405: my ($userroles,$allroles) = @_;
2406: my $author=0;
2407: my $adv=0;
2408: foreach (keys %{$allroles}) {
2409: my %thesepriv=();
2410: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2411: foreach (split(/:/,$$allroles{$_})) {
2412: if ($_ ne '') {
2413: my ($privilege,$restrictions)=split(/&/,$_);
2414: if ($restrictions eq '') {
2415: $thesepriv{$privilege}='F';
2416: } elsif ($thesepriv{$privilege} ne 'F') {
2417: $thesepriv{$privilege}.=$restrictions;
2418: }
2419: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2420: }
2421: }
2422: my $thesestr='';
2423: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2424: $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
2425: }
2426: return ($author,$adv);
2427: }
2428:
2429: # --------------------------------------------------------------- get interface
2430:
2431: sub get {
2432: my ($namespace,$storearr,$udomain,$uname)=@_;
2433: my $items='';
2434: foreach (@$storearr) {
2435: $items.=escape($_).'&';
2436: }
2437: $items=~s/\&$//;
2438: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2439: if (!$uname) { $uname=$ENV{'user.name'}; }
2440: my $uhome=&homeserver($uname,$udomain);
2441:
2442: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2443: my @pairs=split(/\&/,$rep);
2444: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2445: return @pairs;
2446: }
2447: my %returnhash=();
2448: my $i=0;
2449: foreach (@$storearr) {
2450: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2451: $i++;
2452: }
2453: return %returnhash;
2454: }
2455:
2456: # --------------------------------------------------------------- del interface
2457:
2458: sub del {
2459: my ($namespace,$storearr,$udomain,$uname)=@_;
2460: my $items='';
2461: foreach (@$storearr) {
2462: $items.=escape($_).'&';
2463: }
2464: $items=~s/\&$//;
2465: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2466: if (!$uname) { $uname=$ENV{'user.name'}; }
2467: my $uhome=&homeserver($uname,$udomain);
2468:
2469: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2470: }
2471:
2472: # -------------------------------------------------------------- dump interface
2473:
2474: sub dump {
2475: my ($namespace,$udomain,$uname,$regexp)=@_;
2476: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2477: if (!$uname) { $uname=$ENV{'user.name'}; }
2478: my $uhome=&homeserver($uname,$udomain);
2479: if ($regexp) {
2480: $regexp=&escape($regexp);
2481: } else {
2482: $regexp='.';
2483: }
2484: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2485: my @pairs=split(/\&/,$rep);
2486: my %returnhash=();
2487: foreach (@pairs) {
2488: my ($key,$value)=split(/=/,$_);
2489: $returnhash{unescape($key)}=&thaw_unescape($value);
2490: }
2491: return %returnhash;
2492: }
2493:
2494: # -------------------------------------------------------------- keys interface
2495:
2496: sub getkeys {
2497: my ($namespace,$udomain,$uname)=@_;
2498: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2499: if (!$uname) { $uname=$ENV{'user.name'}; }
2500: my $uhome=&homeserver($uname,$udomain);
2501: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2502: my @keyarray=();
2503: foreach (split(/\&/,$rep)) {
2504: push (@keyarray,&unescape($_));
2505: }
2506: return @keyarray;
2507: }
2508:
2509: # --------------------------------------------------------------- currentdump
2510: sub currentdump {
2511: my ($courseid,$sdom,$sname)=@_;
2512: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2513: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2514: $sname = $ENV{'user.name'} if (! defined($sname));
2515: my $uhome = &homeserver($sname,$sdom);
2516: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2517: return if ($rep =~ /^(error:|no_such_host)/);
2518: #
2519: my %returnhash=();
2520: #
2521: if ($rep eq "unknown_cmd") {
2522: # an old lond will not know currentdump
2523: # Do a dump and make it look like a currentdump
2524: my @tmp = &dump($courseid,$sdom,$sname,'.');
2525: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2526: my %hash = @tmp;
2527: @tmp=();
2528: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2529: } else {
2530: my @pairs=split(/\&/,$rep);
2531: foreach (@pairs) {
2532: my ($key,$value)=split(/=/,$_);
2533: my ($symb,$param) = split(/:/,$key);
2534: $returnhash{&unescape($symb)}->{&unescape($param)} =
2535: &thaw_unescape($value);
2536: }
2537: }
2538: return %returnhash;
2539: }
2540:
2541: sub convert_dump_to_currentdump{
2542: my %hash = %{shift()};
2543: my %returnhash;
2544: # Code ripped from lond, essentially. The only difference
2545: # here is the unescaping done by lonnet::dump(). Conceivably
2546: # we might run in to problems with parameter names =~ /^v\./
2547: while (my ($key,$value) = each(%hash)) {
2548: my ($v,$symb,$param) = split(/:/,$key);
2549: next if ($v eq 'version' || $symb eq 'keys');
2550: next if (exists($returnhash{$symb}) &&
2551: exists($returnhash{$symb}->{$param}) &&
2552: $returnhash{$symb}->{'v.'.$param} > $v);
2553: $returnhash{$symb}->{$param}=$value;
2554: $returnhash{$symb}->{'v.'.$param}=$v;
2555: }
2556: #
2557: # Remove all of the keys in the hashes which keep track of
2558: # the version of the parameter.
2559: while (my ($symb,$param_hash) = each(%returnhash)) {
2560: # use a foreach because we are going to delete from the hash.
2561: foreach my $key (keys(%$param_hash)) {
2562: delete($param_hash->{$key}) if ($key =~ /^v\./);
2563: }
2564: }
2565: return \%returnhash;
2566: }
2567:
2568: # --------------------------------------------------------------- inc interface
2569:
2570: sub inc {
2571: my ($namespace,$store,$udomain,$uname) = @_;
2572: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2573: if (!$uname) { $uname=$ENV{'user.name'}; }
2574: my $uhome=&homeserver($uname,$udomain);
2575: my $items='';
2576: if (! ref($store)) {
2577: # got a single value, so use that instead
2578: $items = &escape($store).'=&';
2579: } elsif (ref($store) eq 'SCALAR') {
2580: $items = &escape($$store).'=&';
2581: } elsif (ref($store) eq 'ARRAY') {
2582: $items = join('=&',map {&escape($_);} @{$store});
2583: } elsif (ref($store) eq 'HASH') {
2584: while (my($key,$value) = each(%{$store})) {
2585: $items.= &escape($key).'='.&escape($value).'&';
2586: }
2587: }
2588: $items=~s/\&$//;
2589: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2590: }
2591:
2592: # --------------------------------------------------------------- put interface
2593:
2594: sub put {
2595: my ($namespace,$storehash,$udomain,$uname)=@_;
2596: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2597: if (!$uname) { $uname=$ENV{'user.name'}; }
2598: my $uhome=&homeserver($uname,$udomain);
2599: my $items='';
2600: foreach (keys %$storehash) {
2601: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2602: }
2603: $items=~s/\&$//;
2604: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2605: }
2606:
2607: # ---------------------------------------------------------- putstore interface
2608:
2609: sub putstore {
2610: my ($namespace,$storehash,$udomain,$uname)=@_;
2611: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2612: if (!$uname) { $uname=$ENV{'user.name'}; }
2613: my $uhome=&homeserver($uname,$udomain);
2614: my $items='';
2615: my %allitems = ();
2616: foreach (keys %$storehash) {
2617: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
2618: my $key = $1.':keys:'.$2;
2619: $allitems{$key} .= $3.':';
2620: }
2621: $items.=$_.'='.&freeze_escape($$storehash{$_}).'&';
2622: }
2623: foreach (keys %allitems) {
2624: $allitems{$_} =~ s/\:$//;
2625: $items.= $_.'='.$allitems{$_}.'&';
2626: }
2627: $items=~s/\&$//;
2628: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2629: }
2630:
2631: # ------------------------------------------------------ critical put interface
2632:
2633: sub cput {
2634: my ($namespace,$storehash,$udomain,$uname)=@_;
2635: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2636: if (!$uname) { $uname=$ENV{'user.name'}; }
2637: my $uhome=&homeserver($uname,$udomain);
2638: my $items='';
2639: foreach (keys %$storehash) {
2640: $items.=escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2641: }
2642: $items=~s/\&$//;
2643: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2644: }
2645:
2646: # -------------------------------------------------------------- eget interface
2647:
2648: sub eget {
2649: my ($namespace,$storearr,$udomain,$uname)=@_;
2650: my $items='';
2651: foreach (@$storearr) {
2652: $items.=escape($_).'&';
2653: }
2654: $items=~s/\&$//;
2655: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2656: if (!$uname) { $uname=$ENV{'user.name'}; }
2657: my $uhome=&homeserver($uname,$udomain);
2658: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2659: my @pairs=split(/\&/,$rep);
2660: my %returnhash=();
2661: my $i=0;
2662: foreach (@$storearr) {
2663: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2664: $i++;
2665: }
2666: return %returnhash;
2667: }
2668:
2669: # ---------------------------------------------- Custom access rule evaluation
2670:
2671: sub customaccess {
2672: my ($priv,$uri)=@_;
2673: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2674: $urealm=~s/^\W//;
2675: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2676: my $access=0;
2677: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2678: my ($effect,$realm,$role)=split(/\:/,$_);
2679: if ($role) {
2680: if ($role ne $urole) { next; }
2681: }
2682: foreach (split(/\s*\,\s*/,$realm)) {
2683: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2684: if ($tdom) {
2685: if ($tdom ne $udom) { next; }
2686: }
2687: if ($tcrs) {
2688: if ($tcrs ne $ucrs) { next; }
2689: }
2690: if ($tsec) {
2691: if ($tsec ne $usec) { next; }
2692: }
2693: $access=($effect eq 'allow');
2694: last;
2695: }
2696: if ($realm eq '' && $role eq '') {
2697: $access=($effect eq 'allow');
2698: }
2699: }
2700: return $access;
2701: }
2702:
2703: # ------------------------------------------------- Check for a user privilege
2704:
2705: sub allowed {
2706: my ($priv,$uri,$symb)=@_;
2707: $uri=&deversion($uri);
2708: my $orguri=$uri;
2709: $uri=&declutter($uri);
2710:
2711:
2712:
2713: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
2714: # Free bre access to adm and meta resources
2715: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
2716: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2717: return 'F';
2718: }
2719:
2720: # Free bre access to user's own portfolio contents
2721: my ($space,$domain,$name,$dir)=split('/',$uri);
2722: if (($space=~/^(uploaded|ediupload)$/) && ($ENV{'user.name'} eq $name) &&
2723: ($ENV{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
2724: return 'F';
2725: }
2726:
2727: # Free bre to public access
2728:
2729: if ($priv eq 'bre') {
2730: my $copyright=&metadata($uri,'copyright');
2731: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2732: return 'F';
2733: }
2734: if ($copyright eq 'priv') {
2735: $uri=~/([^\/]+)\/([^\/]+)\//;
2736: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2737: return '';
2738: }
2739: }
2740: if ($copyright eq 'domain') {
2741: $uri=~/([^\/]+)\/([^\/]+)\//;
2742: unless (($ENV{'user.domain'} eq $1) ||
2743: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2744: return '';
2745: }
2746: }
2747: if ($ENV{'request.role'}=~ /li\.\//) {
2748: # Library role, so allow browsing of resources in this domain.
2749: return 'F';
2750: }
2751: if ($copyright eq 'custom') {
2752: unless (&customaccess($priv,$uri)) { return ''; }
2753: }
2754: }
2755: # Domain coordinator is trying to create a course
2756: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2757: # uri is the requested domain in this case.
2758: # comparison to 'request.role.domain' shows if the user has selected
2759: # a role of dc for the domain in question.
2760: return 'F' if ($uri eq $ENV{'request.role.domain'});
2761: }
2762:
2763: my $thisallowed='';
2764: my $statecond=0;
2765: my $courseprivid='';
2766:
2767: # Course
2768:
2769: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
2770: $thisallowed.=$1;
2771: }
2772:
2773: # Domain
2774:
2775: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2776: =~/\Q$priv\E\&([^\:]*)/) {
2777: $thisallowed.=$1;
2778: }
2779:
2780: # Course: uri itself is a course
2781: my $courseuri=$uri;
2782: $courseuri=~s/\_(\d)/\/$1/;
2783: $courseuri=~s/^([^\/])/\/$1/;
2784:
2785: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2786: =~/\Q$priv\E\&([^\:]*)/) {
2787: $thisallowed.=$1;
2788: }
2789:
2790: # URI is an uploaded document for this course
2791: # not allowing 'edit' access (editupload) to uploaded course docs
2792: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
2793: my $refuri=$ENV{'httpref.'.$orguri};
2794: if ($refuri) {
2795: if ($refuri =~ m|^/adm/|) {
2796: $thisallowed='F';
2797: }
2798: }
2799: }
2800:
2801: # Full access at system, domain or course-wide level? Exit.
2802:
2803: if ($thisallowed=~/F/) {
2804: return 'F';
2805: }
2806:
2807: # If this is generating or modifying users, exit with special codes
2808:
2809: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:\Q$priv\E\:/) {
2810: return $thisallowed;
2811: }
2812: #
2813: # Gathered so far: system, domain and course wide privileges
2814: #
2815: # Course: See if uri or referer is an individual resource that is part of
2816: # the course
2817:
2818: if ($ENV{'request.course.id'}) {
2819:
2820: $courseprivid=$ENV{'request.course.id'};
2821: if ($ENV{'request.course.sec'}) {
2822: $courseprivid.='/'.$ENV{'request.course.sec'};
2823: }
2824: $courseprivid=~s/\_/\//;
2825: my $checkreferer=1;
2826: my ($match,$cond)=&is_on_map($uri);
2827: if ($match) {
2828: $statecond=$cond;
2829: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2830: =~/\Q$priv\E\&([^\:]*)/) {
2831: $thisallowed.=$1;
2832: $checkreferer=0;
2833: }
2834: }
2835:
2836: if ($checkreferer) {
2837: my $refuri=$ENV{'httpref.'.$orguri};
2838: unless ($refuri) {
2839: foreach (keys %ENV) {
2840: if ($_=~/^httpref\..*\*/) {
2841: my $pattern=$_;
2842: $pattern=~s/^httpref\.\/res\///;
2843: $pattern=~s/\*/\[\^\/\]\+/g;
2844: $pattern=~s/\//\\\//g;
2845: if ($orguri=~/$pattern/) {
2846: $refuri=$ENV{$_};
2847: }
2848: }
2849: }
2850: }
2851:
2852: if ($refuri) {
2853: $refuri=&declutter($refuri);
2854: my ($match,$cond)=&is_on_map($refuri);
2855: if ($match) {
2856: my $refstatecond=$cond;
2857: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2858: =~/\Q$priv\E\&([^\:]*)/) {
2859: $thisallowed.=$1;
2860: $uri=$refuri;
2861: $statecond=$refstatecond;
2862: }
2863: }
2864: }
2865: }
2866: }
2867:
2868: #
2869: # Gathered now: all privileges that could apply, and condition number
2870: #
2871: #
2872: # Full or no access?
2873: #
2874:
2875: if ($thisallowed=~/F/) {
2876: return 'F';
2877: }
2878:
2879: unless ($thisallowed) {
2880: return '';
2881: }
2882:
2883: # Restrictions exist, deal with them
2884: #
2885: # C:according to course preferences
2886: # R:according to resource settings
2887: # L:unless locked
2888: # X:according to user session state
2889: #
2890:
2891: # Possibly locked functionality, check all courses
2892: # Locks might take effect only after 10 minutes cache expiration for other
2893: # courses, and 2 minutes for current course
2894:
2895: my $envkey;
2896: if ($thisallowed=~/L/) {
2897: foreach $envkey (keys %ENV) {
2898: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2899: my $courseid=$2;
2900: my $roleid=$1.'.'.$2;
2901: $courseid=~s/^\///;
2902: my $expiretime=600;
2903: if ($ENV{'request.role'} eq $roleid) {
2904: $expiretime=120;
2905: }
2906: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2907: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2908: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2909: &coursedescription($courseid);
2910: }
2911: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
2912: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2913: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2914: &log($ENV{'user.domain'},$ENV{'user.name'},
2915: $ENV{'user.home'},
2916: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2917: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2918: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2919: return '';
2920: }
2921: }
2922: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
2923: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2924: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2925: &log($ENV{'user.domain'},$ENV{'user.name'},
2926: $ENV{'user.home'},
2927: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2928: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2929: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2930: return '';
2931: }
2932: }
2933: }
2934: }
2935: }
2936:
2937: #
2938: # Rest of the restrictions depend on selected course
2939: #
2940:
2941: unless ($ENV{'request.course.id'}) {
2942: return '1';
2943: }
2944:
2945: #
2946: # Now user is definitely in a course
2947: #
2948:
2949:
2950: # Course preferences
2951:
2952: if ($thisallowed=~/C/) {
2953: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2954: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2955: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2956: =~/\Q$rolecode\E/) {
2957: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2958: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2959: $ENV{'request.course.id'});
2960: return '';
2961: }
2962:
2963: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2964: =~/\Q$unamedom\E/) {
2965: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2966: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2967: $ENV{'request.course.id'});
2968: return '';
2969: }
2970: }
2971:
2972: # Resource preferences
2973:
2974: if ($thisallowed=~/R/) {
2975: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2976: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
2977: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2978: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2979: return '';
2980: }
2981: }
2982:
2983: # Restricted by state or randomout?
2984:
2985: if ($thisallowed=~/X/) {
2986: if ($ENV{'acc.randomout'}) {
2987: if (!$symb) { $symb=&symbread($uri,1); }
2988: if (($symb) && ($ENV{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
2989: return '';
2990: }
2991: }
2992: if (&condval($statecond)) {
2993: return '2';
2994: } else {
2995: return '';
2996: }
2997: }
2998:
2999: return 'F';
3000: }
3001:
3002: # --------------------------------------------------- Is a resource on the map?
3003:
3004: sub is_on_map {
3005: my $uri=&declutter(shift);
3006: $uri=~s/\.\d+\.(\w+)$/\.$1/;
3007: my @uriparts=split(/\//,$uri);
3008: my $filename=$uriparts[$#uriparts];
3009: my $pathname=$uri;
3010: $pathname=~s|/\Q$filename\E$||;
3011: $pathname=~s/^adm\/wrapper\///;
3012: #Trying to find the conditional for the file
3013: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
3014: /\&\Q$filename\E\:([\d\|]+)\&/);
3015: if ($match) {
3016: return (1,$1);
3017: } else {
3018: return (0,0);
3019: }
3020: }
3021:
3022: # --------------------------------------------------------- Get symb from alias
3023:
3024: sub get_symb_from_alias {
3025: my $symb=shift;
3026: my ($map,$resid,$url)=&decode_symb($symb);
3027: # Already is a symb
3028: if ($url) { return $symb; }
3029: # Must be an alias
3030: my $aliassymb='';
3031: my %bighash;
3032: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3033: &GDBM_READER(),0640)) {
3034: my $rid=$bighash{'mapalias_'.$symb};
3035: if ($rid) {
3036: my ($mapid,$resid)=split(/\./,$rid);
3037: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3038: $resid,$bighash{'src_'.$rid});
3039: }
3040: untie %bighash;
3041: }
3042: return $aliassymb;
3043: }
3044:
3045: # ----------------------------------------------------------------- Define Role
3046:
3047: sub definerole {
3048: if (allowed('mcr','/')) {
3049: my ($rolename,$sysrole,$domrole,$courole)=@_;
3050: foreach (split(':',$sysrole)) {
3051: my ($crole,$cqual)=split(/\&/,$_);
3052: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3053: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3054: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3055: return "refused:s:$crole&$cqual";
3056: }
3057: }
3058: }
3059: foreach (split(':',$domrole)) {
3060: my ($crole,$cqual)=split(/\&/,$_);
3061: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3062: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3063: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3064: return "refused:d:$crole&$cqual";
3065: }
3066: }
3067: }
3068: foreach (split(':',$courole)) {
3069: my ($crole,$cqual)=split(/\&/,$_);
3070: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3071: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3072: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3073: return "refused:c:$crole&$cqual";
3074: }
3075: }
3076: }
3077: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3078: "$ENV{'user.domain'}:$ENV{'user.name'}:".
3079: "rolesdef_$rolename=".
3080: escape($sysrole.'_'.$domrole.'_'.$courole);
3081: return reply($command,$ENV{'user.home'});
3082: } else {
3083: return 'refused';
3084: }
3085: }
3086:
3087: # ---------------- Make a metadata query against the network of library servers
3088:
3089: sub metadata_query {
3090: my ($query,$custom,$customshow,$server_array)=@_;
3091: my %rhash;
3092: my @server_list = (defined($server_array) ? @$server_array
3093: : keys(%libserv) );
3094: for my $server (@server_list) {
3095: unless ($custom or $customshow) {
3096: my $reply=&reply("querysend:".&escape($query),$server);
3097: $rhash{$server}=$reply;
3098: }
3099: else {
3100: my $reply=&reply("querysend:".&escape($query).':'.
3101: &escape($custom).':'.&escape($customshow),
3102: $server);
3103: $rhash{$server}=$reply;
3104: }
3105: }
3106: return \%rhash;
3107: }
3108:
3109: # ----------------------------------------- Send log queries and wait for reply
3110:
3111: sub log_query {
3112: my ($uname,$udom,$query,%filters)=@_;
3113: my $uhome=&homeserver($uname,$udom);
3114: if ($uhome eq 'no_host') { return 'error: no_host'; }
3115: my $uhost=$hostname{$uhome};
3116: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3117: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3118: $uhome);
3119: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3120: return get_query_reply($queryid);
3121: }
3122:
3123: # ------- Request retrieval of institutional classlists for course(s)
3124:
3125: sub fetch_enrollment_query {
3126: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3127: my $homeserver;
3128: my $maxtries = 1;
3129: if ($context eq 'automated') {
3130: $homeserver = $perlvar{'lonHostID'};
3131: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3132: } else {
3133: $homeserver = &homeserver($cnum,$dom);
3134: }
3135: my $host=$hostname{$homeserver};
3136: my $cmd = '';
3137: foreach (keys %{$affiliatesref}) {
3138: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3139: }
3140: $cmd =~ s/%%$//;
3141: $cmd = &escape($cmd);
3142: my $query = 'fetchenrollment';
3143: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$ENV{'user.name'}.':'.$cmd,$homeserver);
3144: unless ($queryid=~/^\Q$host\E\_/) {
3145: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3146: return 'error: '.$queryid;
3147: }
3148: my $reply = &get_query_reply($queryid);
3149: my $tries = 1;
3150: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3151: $reply = &get_query_reply($queryid);
3152: $tries ++;
3153: }
3154: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3155: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$ENV{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3156: } else {
3157: my @responses = split/:/,$reply;
3158: if ($homeserver eq $perlvar{'lonHostID'}) {
3159: foreach (@responses) {
3160: my ($key,$value) = split/=/,$_;
3161: $$replyref{$key} = $value;
3162: }
3163: } else {
3164: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3165: foreach (@responses) {
3166: my ($key,$value) = split/=/,$_;
3167: $$replyref{$key} = $value;
3168: if ($value > 0) {
3169: foreach (@{$$affiliatesref{$key}}) {
3170: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3171: my $destname = $pathname.'/'.$filename;
3172: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3173: if ($xml_classlist =~ /^error/) {
3174: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3175: } else {
3176: if ( open(FILE,">$destname") ) {
3177: print FILE &unescape($xml_classlist);
3178: close(FILE);
3179: } else {
3180: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3181: }
3182: }
3183: }
3184: }
3185: }
3186: }
3187: return 'ok';
3188: }
3189: return 'error';
3190: }
3191:
3192: sub get_query_reply {
3193: my $queryid=shift;
3194: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3195: my $reply='';
3196: for (1..100) {
3197: sleep 2;
3198: if (-e $replyfile.'.end') {
3199: if (open(my $fh,$replyfile)) {
3200: $reply.=<$fh>;
3201: close($fh);
3202: } else { return 'error: reply_file_error'; }
3203: return &unescape($reply);
3204: }
3205: }
3206: return 'timeout:'.$queryid;
3207: }
3208:
3209: sub courselog_query {
3210: #
3211: # possible filters:
3212: # url: url or symb
3213: # username
3214: # domain
3215: # action: view, submit, grade
3216: # start: timestamp
3217: # end: timestamp
3218: #
3219: my (%filters)=@_;
3220: unless ($ENV{'request.course.id'}) { return 'no_course'; }
3221: if ($filters{'url'}) {
3222: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3223: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3224: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3225: }
3226: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
3227: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
3228: return &log_query($cname,$cdom,'courselog',%filters);
3229: }
3230:
3231: sub userlog_query {
3232: my ($uname,$udom,%filters)=@_;
3233: return &log_query($uname,$udom,'userlog',%filters);
3234: }
3235:
3236: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3237:
3238: sub auto_run {
3239: my ($cnum,$cdom) = @_;
3240: my $homeserver = &homeserver($cnum,$cdom);
3241: my $response = &reply('autorun:'.$cdom,$homeserver);
3242: return $response;
3243: }
3244:
3245: sub auto_get_sections {
3246: my ($cnum,$cdom,$inst_coursecode) = @_;
3247: my $homeserver = &homeserver($cnum,$cdom);
3248: my @secs = ();
3249: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3250: unless ($response eq 'refused') {
3251: @secs = split/:/,$response;
3252: }
3253: return @secs;
3254: }
3255:
3256: sub auto_new_course {
3257: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3258: my $homeserver = &homeserver($cnum,$cdom);
3259: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3260: return $response;
3261: }
3262:
3263: sub auto_validate_courseID {
3264: my ($cnum,$cdom,$inst_course_id) = @_;
3265: my $homeserver = &homeserver($cnum,$cdom);
3266: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3267: return $response;
3268: }
3269:
3270: sub auto_create_password {
3271: my ($cnum,$cdom,$authparam) = @_;
3272: my $homeserver = &homeserver($cnum,$cdom);
3273: my $create_passwd = 0;
3274: my $authchk = '';
3275: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3276: if ($response eq 'refused') {
3277: $authchk = 'refused';
3278: } else {
3279: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3280: }
3281: return ($authparam,$create_passwd,$authchk);
3282: }
3283:
3284: sub auto_instcode_format {
3285: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3286: my $courses = '';
3287: my $homeserver;
3288: if ($caller eq 'global') {
3289: foreach my $tryserver (keys %libserv) {
3290: if ($hostdom{$tryserver} eq $codedom) {
3291: $homeserver = $tryserver;
3292: last;
3293: }
3294: }
3295: if (($ENV{'user.name'}) && ($ENV{'user.domain'} eq $codedom)) {
3296: $homeserver = &homeserver($ENV{'user.name'},$codedom);
3297: }
3298: } else {
3299: $homeserver = &homeserver($caller,$codedom);
3300: }
3301: foreach (keys %{$instcodes}) {
3302: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3303: }
3304: chop($courses);
3305: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3306: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3307: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3308: %{$codes} = &str2hash($codes_str);
3309: @{$codetitles} = &str2array($codetitles_str);
3310: %{$cat_titles} = &str2hash($cat_titles_str);
3311: %{$cat_order} = &str2hash($cat_order_str);
3312: return 'ok';
3313: }
3314: return $response;
3315: }
3316:
3317: # ------------------------------------------------------------------ Plain Text
3318:
3319: sub plaintext {
3320: my $short=shift;
3321: return &mt($prp{$short});
3322: }
3323:
3324: # ----------------------------------------------------------------- Assign Role
3325:
3326: sub assignrole {
3327: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3328: my $mrole;
3329: if ($role =~ /^cr\//) {
3330: my $cwosec=$url;
3331: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3332: unless (&allowed('ccr',$cwosec)) {
3333: &logthis('Refused custom assignrole: '.
3334: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3335: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3336: return 'refused';
3337: }
3338: $mrole='cr';
3339: } else {
3340: my $cwosec=$url;
3341: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3342: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3343: &logthis('Refused assignrole: '.
3344: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3345: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3346: return 'refused';
3347: }
3348: $mrole=$role;
3349: }
3350: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3351: "$udom:$uname:$url".'_'."$mrole=$role";
3352: if ($end) { $command.='_'.$end; }
3353: if ($start) {
3354: if ($end) {
3355: $command.='_'.$start;
3356: } else {
3357: $command.='_0_'.$start;
3358: }
3359: }
3360: # actually delete
3361: if ($deleteflag) {
3362: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3363: # modify command to delete the role
3364: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
3365: "$udom:$uname:$url".'_'."$mrole";
3366: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
3367: # set start and finish to negative values for userrolelog
3368: $start=-1;
3369: $end=-1;
3370: }
3371: }
3372: # send command
3373: my $answer=&reply($command,&homeserver($uname,$udom));
3374: # log new user role if status is ok
3375: if ($answer eq 'ok') {
3376: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
3377: }
3378: return $answer;
3379: }
3380:
3381: # -------------------------------------------------- Modify user authentication
3382: # Overrides without validation
3383:
3384: sub modifyuserauth {
3385: my ($udom,$uname,$umode,$upass)=@_;
3386: my $uhome=&homeserver($uname,$udom);
3387: unless (&allowed('mau',$udom)) { return 'refused'; }
3388: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3389: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3390: ' in domain '.$ENV{'request.role.domain'});
3391: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3392: &escape($upass),$uhome);
3393: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
3394: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3395: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3396: &log($udom,,$uname,$uhome,
3397: 'Authentication changed by '.$ENV{'user.domain'}.', '.
3398: $ENV{'user.name'}.', '.$umode.
3399: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3400: unless ($reply eq 'ok') {
3401: &logthis('Authentication mode error: '.$reply);
3402: return 'error: '.$reply;
3403: }
3404: return 'ok';
3405: }
3406:
3407: # --------------------------------------------------------------- Modify a user
3408:
3409: sub modifyuser {
3410: my ($udom, $uname, $uid,
3411: $umode, $upass, $first,
3412: $middle, $last, $gene,
3413: $forceid, $desiredhome, $email)=@_;
3414: $udom=~s/\W//g;
3415: $uname=~s/\W//g;
3416: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3417: $umode.', '.$first.', '.$middle.', '.
3418: $last.', '.$gene.'(forceid: '.$forceid.')'.
3419: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3420: ' desiredhome not specified').
3421: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3422: ' in domain '.$ENV{'request.role.domain'});
3423: my $uhome=&homeserver($uname,$udom,'true');
3424: # ----------------------------------------------------------------- Create User
3425: if (($uhome eq 'no_host') &&
3426: (($umode && $upass) || ($umode eq 'localauth'))) {
3427: my $unhome='';
3428: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3429: $unhome = $desiredhome;
3430: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
3431: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
3432: } else { # load balancing routine for determining $unhome
3433: my $tryserver;
3434: my $loadm=10000000;
3435: foreach $tryserver (keys %libserv) {
3436: if ($hostdom{$tryserver} eq $udom) {
3437: my $answer=reply('load',$tryserver);
3438: if (($answer=~/\d+/) && ($answer<$loadm)) {
3439: $loadm=$answer;
3440: $unhome=$tryserver;
3441: }
3442: }
3443: }
3444: }
3445: if (($unhome eq '') || ($unhome eq 'no_host')) {
3446: return 'error: unable to find a home server for '.$uname.
3447: ' in domain '.$udom;
3448: }
3449: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3450: &escape($upass),$unhome);
3451: unless ($reply eq 'ok') {
3452: return 'error: '.$reply;
3453: }
3454: $uhome=&homeserver($uname,$udom,'true');
3455: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3456: return 'error: unable verify users home machine.';
3457: }
3458: } # End of creation of new user
3459: # ---------------------------------------------------------------------- Add ID
3460: if ($uid) {
3461: $uid=~tr/A-Z/a-z/;
3462: my %uidhash=&idrget($udom,$uname);
3463: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3464: && (!$forceid)) {
3465: unless ($uid eq $uidhash{$uname}) {
3466: return 'error: user id "'.$uid.'" does not match '.
3467: 'current user id "'.$uidhash{$uname}.'".';
3468: }
3469: } else {
3470: &idput($udom,($uname => $uid));
3471: }
3472: }
3473: # -------------------------------------------------------------- Add names, etc
3474: my @tmp=&get('environment',
3475: ['firstname','middlename','lastname','generation'],
3476: $udom,$uname);
3477: my %names;
3478: if ($tmp[0] =~ m/^error:.*/) {
3479: %names=();
3480: } else {
3481: %names = @tmp;
3482: }
3483: #
3484: # Make sure to not trash student environment if instructor does not bother
3485: # to supply name and email information
3486: #
3487: if ($first) { $names{'firstname'} = $first; }
3488: if (defined($middle)) { $names{'middlename'} = $middle; }
3489: if ($last) { $names{'lastname'} = $last; }
3490: if (defined($gene)) { $names{'generation'} = $gene; }
3491: if ($email) {
3492: $email=~s/[^\w\@\.\-\,]//gs;
3493: if ($email=~/\@/) { $names{'notification'} = $email;
3494: $names{'critnotification'} = $email;
3495: $names{'permanentemail'} = $email; }
3496: }
3497: my $reply = &put('environment', \%names, $udom,$uname);
3498: if ($reply ne 'ok') { return 'error: '.$reply; }
3499: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
3500: $umode.', '.$first.', '.$middle.', '.
3501: $last.', '.$gene.' by '.
3502: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3503: return 'ok';
3504: }
3505:
3506: # -------------------------------------------------------------- Modify student
3507:
3508: sub modifystudent {
3509: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3510: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
3511: if (!$cid) {
3512: unless ($cid=$ENV{'request.course.id'}) {
3513: return 'not_in_class';
3514: }
3515: }
3516: # --------------------------------------------------------------- Make the user
3517: my $reply=&modifyuser
3518: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
3519: $desiredhome,$email);
3520: unless ($reply eq 'ok') { return $reply; }
3521: # This will cause &modify_student_enrollment to get the uid from the
3522: # students environment
3523: $uid = undef if (!$forceid);
3524: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
3525: $gene,$usec,$end,$start,$type,$locktype,$cid);
3526: return $reply;
3527: }
3528:
3529: sub modify_student_enrollment {
3530: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
3531: my ($cdom,$cnum,$chome);
3532: if (!$cid) {
3533: unless ($cid=$ENV{'request.course.id'}) {
3534: return 'not_in_class';
3535: }
3536: $cdom=$ENV{'course.'.$cid.'.domain'};
3537: $cnum=$ENV{'course.'.$cid.'.num'};
3538: } else {
3539: ($cdom,$cnum)=split(/_/,$cid);
3540: }
3541: $chome=$ENV{'course.'.$cid.'.home'};
3542: if (!$chome) {
3543: $chome=&homeserver($cnum,$cdom);
3544: }
3545: if (!$chome) { return 'unknown_course'; }
3546: # Make sure the user exists
3547: my $uhome=&homeserver($uname,$udom);
3548: if (($uhome eq '') || ($uhome eq 'no_host')) {
3549: return 'error: no such user';
3550: }
3551: # Get student data if we were not given enough information
3552: if (!defined($first) || $first eq '' ||
3553: !defined($last) || $last eq '' ||
3554: !defined($uid) || $uid eq '' ||
3555: !defined($middle) || $middle eq '' ||
3556: !defined($gene) || $gene eq '') {
3557: # They did not supply us with enough data to enroll the student, so
3558: # we need to pick up more information.
3559: my %tmp = &get('environment',
3560: ['firstname','middlename','lastname', 'generation','id']
3561: ,$udom,$uname);
3562:
3563: #foreach (keys(%tmp)) {
3564: # &logthis("key $_ = ".$tmp{$_});
3565: #}
3566: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3567: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3568: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3569: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3570: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3571: }
3572: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
3573: my $reply=cput('classlist',
3574: {"$uname:$udom" =>
3575: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
3576: $cdom,$cnum);
3577: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3578: return 'error: '.$reply;
3579: }
3580: # Add student role to user
3581: my $uurl='/'.$cid;
3582: $uurl=~s/\_/\//g;
3583: if ($usec) {
3584: $uurl.='/'.$usec;
3585: }
3586: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3587: }
3588:
3589: sub format_name {
3590: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
3591: my $name;
3592: if ($first ne 'lastname') {
3593: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
3594: } else {
3595: if ($lastname=~/\S/) {
3596: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
3597: $name=~s/\s+,/,/;
3598: } else {
3599: $name.= $firstname.' '.$middlename.' '.$generation;
3600: }
3601: }
3602: $name=~s/^\s+//;
3603: $name=~s/\s+$//;
3604: $name=~s/\s+/ /g;
3605: return $name;
3606: }
3607:
3608: # ------------------------------------------------- Write to course preferences
3609:
3610: sub writecoursepref {
3611: my ($courseid,%prefs)=@_;
3612: $courseid=~s/^\///;
3613: $courseid=~s/\_/\//g;
3614: my ($cdomain,$cnum)=split(/\//,$courseid);
3615: my $chome=homeserver($cnum,$cdomain);
3616: if (($chome eq '') || ($chome eq 'no_host')) {
3617: return 'error: no such course';
3618: }
3619: my $cstring='';
3620: foreach (keys %prefs) {
3621: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3622: }
3623: $cstring=~s/\&$//;
3624: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3625: }
3626:
3627: # ---------------------------------------------------------- Make/modify course
3628:
3629: sub createcourse {
3630: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_;
3631: $url=&declutter($url);
3632: my $cid='';
3633: unless (&allowed('ccc',$udom)) {
3634: return 'refused';
3635: }
3636: # ------------------------------------------------------------------- Create ID
3637: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3638: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3639: # ----------------------------------------------- Make sure that does not exist
3640: my $uhome=&homeserver($uname,$udom,'true');
3641: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3642: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3643: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3644: $uhome=&homeserver($uname,$udom,'true');
3645: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3646: return 'error: unable to generate unique course-ID';
3647: }
3648: }
3649: # ------------------------------------------------ Check supplied server name
3650: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3651: if (! exists($libserv{$course_server})) {
3652: return 'error:bad server name '.$course_server;
3653: }
3654: # ------------------------------------------------------------- Make the course
3655: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3656: $course_server);
3657: unless ($reply eq 'ok') { return 'error: '.$reply; }
3658: $uhome=&homeserver($uname,$udom,'true');
3659: if (($uhome eq '') || ($uhome eq 'no_host')) {
3660: return 'error: no such course';
3661: }
3662: # ----------------------------------------------------------------- Course made
3663: # log existence
3664: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
3665: ':'.&escape($inst_code).':'.&escape($course_owner),$uhome);
3666: &flushcourselogs();
3667: # set toplevel url
3668: my $topurl=$url;
3669: unless ($nonstandard) {
3670: # ------------------------------------------ For standard courses, make top url
3671: my $mapurl=&clutter($url);
3672: if ($mapurl eq '/res/') { $mapurl=''; }
3673: $ENV{'form.initmap'}=(<<ENDINITMAP);
3674: <map>
3675: <resource id="1" type="start"></resource>
3676: <resource id="2" src="$mapurl"></resource>
3677: <resource id="3" type="finish"></resource>
3678: <link index="1" from="1" to="2"></link>
3679: <link index="2" from="2" to="3"></link>
3680: </map>
3681: ENDINITMAP
3682: $topurl=&declutter(
3683: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3684: );
3685: }
3686: # ----------------------------------------------------------- Write preferences
3687: &writecoursepref($udom.'_'.$uname,
3688: ('description' => $description,
3689: 'url' => $topurl));
3690: return '/'.$udom.'/'.$uname;
3691: }
3692:
3693: # ---------------------------------------------------------- Assign Custom Role
3694:
3695: sub assigncustomrole {
3696: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3697: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3698: $end,$start,$deleteflag);
3699: }
3700:
3701: # ----------------------------------------------------------------- Revoke Role
3702:
3703: sub revokerole {
3704: my ($udom,$uname,$url,$role,$deleteflag)=@_;
3705: my $now=time;
3706: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
3707: }
3708:
3709: # ---------------------------------------------------------- Revoke Custom Role
3710:
3711: sub revokecustomrole {
3712: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
3713: my $now=time;
3714: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3715: $deleteflag);
3716: }
3717:
3718: # ------------------------------------------------------------ Disk usage
3719: sub diskusage {
3720: my ($udom,$uname,$directoryRoot)=@_;
3721: $directoryRoot =~ s/\/$//;
3722: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
3723: return $listing;
3724: }
3725:
3726: sub is_locked {
3727: my ($file_name, $domain, $user) = @_;
3728: my @check;
3729: my $is_locked;
3730: push @check, $file_name;
3731: my %locked = &get('file_permissions',\@check,
3732: $ENV{'user.domain'},$ENV{'user.name'});
3733: my ($tmp)=keys(%locked);
3734: if ($tmp=~/^error:/) { undef(%locked); }
3735:
3736: if (ref($locked{$file_name}) eq 'ARRAY') {
3737: $is_locked = 'true';
3738: } else {
3739: $is_locked = 'false';
3740: }
3741: }
3742:
3743: # ------------------------------------------------------------- Mark as Read Only
3744:
3745: sub mark_as_readonly {
3746: my ($domain,$user,$files,$what) = @_;
3747: my %current_permissions = &dump('file_permissions',$domain,$user);
3748: my ($tmp)=keys(%current_permissions);
3749: if ($tmp=~/^error:/) { undef(%current_permissions); }
3750:
3751: foreach my $file (@{$files}) {
3752: push(@{$current_permissions{$file}},$what);
3753: }
3754: &put('file_permissions',\%current_permissions,$domain,$user);
3755: return;
3756: }
3757:
3758: # ------------------------------------------------------------Save Selected Files
3759:
3760: sub save_selected_files {
3761: my ($user, $path, @files) = @_;
3762: my $filename = $user."savedfiles";
3763: my @other_files = &files_not_in_path($user, $path);
3764: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3765: foreach my $file (@files) {
3766: print (OUT $ENV{'form.currentpath'}.$file."\n");
3767: }
3768: foreach my $file (@other_files) {
3769: print (OUT $file."\n");
3770: }
3771: close (OUT);
3772: return 'ok';
3773: }
3774:
3775: sub clear_selected_files {
3776: my ($user) = @_;
3777: my $filename = $user."savedfiles";
3778: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3779: print (OUT undef);
3780: close (OUT);
3781: return ("ok");
3782: }
3783:
3784: sub files_in_path {
3785: my ($user, $path) = @_;
3786: my $filename = $user."savedfiles";
3787: my %return_files;
3788: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3789: while (my $line_in = <IN>) {
3790: chomp ($line_in);
3791: my @paths_and_file = split (m!/!, $line_in);
3792: my $file_part = pop (@paths_and_file);
3793: my $path_part = join ('/', @paths_and_file);
3794: $path_part.='/';
3795: my $path_and_file = $path_part.$file_part;
3796: if ($path_part eq $path) {
3797: $return_files{$file_part}= 'selected';
3798: }
3799: }
3800: close (IN);
3801: return (\%return_files);
3802: }
3803:
3804: # called in portfolio select mode, to show files selected NOT in current directory
3805: sub files_not_in_path {
3806: my ($user, $path) = @_;
3807: my $filename = $user."savedfiles";
3808: my @return_files;
3809: my $path_part;
3810: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3811: while (<IN>) {
3812: #ok, I know it's clunky, but I want it to work
3813: my @paths_and_file = split m!/!, $_;
3814: my $file_part = pop (@paths_and_file);
3815: chomp ($file_part);
3816: my $path_part = join ('/', @paths_and_file);
3817: $path_part .= '/';
3818: my $path_and_file = $path_part.$file_part;
3819: if ($path_part ne $path) {
3820: push (@return_files, ($path_and_file));
3821: }
3822: }
3823: close (OUT);
3824: return (@return_files);
3825: }
3826:
3827: #--------------------------------------------------------------Get Marked as Read Only
3828:
3829: sub get_marked_as_readonly {
3830: my ($domain,$user,$what) = @_;
3831: my %current_permissions = &dump('file_permissions',$domain,$user);
3832: my ($tmp)=keys(%current_permissions);
3833: if ($tmp=~/^error:/) { undef(%current_permissions); }
3834:
3835: my @readonly_files;
3836: while (my ($file_name,$value) = each(%current_permissions)) {
3837: if (ref($value) eq "ARRAY"){
3838: foreach my $stored_what (@{$value}) {
3839: if ($stored_what eq $what) {
3840: push(@readonly_files, $file_name);
3841: } elsif (!defined($what)) {
3842: push(@readonly_files, $file_name);
3843: }
3844: }
3845: }
3846: }
3847: return @readonly_files;
3848: }
3849: #-----------------------------------------------------------Get Marked as Read Only Hash
3850:
3851: sub get_marked_as_readonly_hash {
3852: my ($domain,$user,$what) = @_;
3853: my %current_permissions = &dump('file_permissions',$domain,$user);
3854: my ($tmp)=keys(%current_permissions);
3855: if ($tmp=~/^error:/) { undef(%current_permissions); }
3856:
3857: my %readonly_files;
3858: while (my ($file_name,$value) = each(%current_permissions)) {
3859: if (ref($value) eq "ARRAY"){
3860: foreach my $stored_what (@{$value}) {
3861: if ($stored_what eq $what) {
3862: $readonly_files{$file_name} = 'locked';
3863: } elsif (!defined($what)) {
3864: $readonly_files{$file_name} = 'locked';
3865: }
3866: }
3867: }
3868: }
3869: return %readonly_files;
3870: }
3871: # ------------------------------------------------------------ Unmark as Read Only
3872:
3873: sub unmark_as_readonly {
3874: # unmarks all files locked by $what
3875: # for portfolio submissions, $what contains $crsid and $symb
3876: my ($domain,$user,$what) = @_;
3877: my %current_permissions = &dump('file_permissions',$domain,$user);
3878: my ($tmp)=keys(%current_permissions);
3879: if ($tmp=~/^error:/) { undef(%current_permissions); }
3880:
3881: my @readonly_files = &get_marked_as_readonly($domain,$user,$what);
3882: foreach my $file(@readonly_files){
3883: my $current_locks = $current_permissions{$file};
3884: my @new_locks;
3885: my @del_keys;
3886: if (ref($current_locks) eq "ARRAY"){
3887: foreach my $locker (@{$current_locks}) {
3888: unless ($locker eq $what) {
3889: push(@new_locks, $what);
3890: }
3891: }
3892: if (@new_locks > 0) {
3893: $current_permissions{$file} = \@new_locks;
3894: } else {
3895: push(@del_keys, $file);
3896: &del('file_permissions',\@del_keys, $domain, $user);
3897: delete $current_permissions{$file};
3898: }
3899: }
3900: }
3901: &put('file_permissions',\%current_permissions,$domain,$user);
3902: return;
3903: }
3904:
3905: # ------------------------------------------------------------ Directory lister
3906:
3907: sub dirlist {
3908: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3909:
3910: $uri=~s/^\///;
3911: $uri=~s/\/$//;
3912: my ($udom, $uname);
3913: (undef,$udom,$uname)=split(/\//,$uri);
3914: if(defined($userdomain)) {
3915: $udom = $userdomain;
3916: }
3917: if(defined($username)) {
3918: $uname = $username;
3919: }
3920:
3921: my $dirRoot = $perlvar{'lonDocRoot'};
3922: if(defined($alternateDirectoryRoot)) {
3923: $dirRoot = $alternateDirectoryRoot;
3924: $dirRoot =~ s/\/$//;
3925: }
3926:
3927: if($udom) {
3928: if($uname) {
3929: my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
3930: homeserver($uname,$udom));
3931: my @listing_results;
3932: if ($listing eq 'unknown_cmd') {
3933: $listing=reply('ls:'.$dirRoot.'/'.$uri,
3934: homeserver($uname,$udom));
3935: @listing_results = split(/:/,$listing);
3936: } else {
3937: @listing_results = map { &unescape($_); } split(/:/,$listing);
3938: }
3939: return @listing_results;
3940: } elsif(!defined($alternateDirectoryRoot)) {
3941: my $tryserver;
3942: my %allusers=();
3943: foreach $tryserver (keys %libserv) {
3944: if($hostdom{$tryserver} eq $udom) {
3945: my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
3946: $udom, $tryserver);
3947: my @listing_results;
3948: if ($listing eq 'unknown_cmd') {
3949: $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3950: $udom, $tryserver);
3951: @listing_results = split(/:/,$listing);
3952: } else {
3953: @listing_results =
3954: map { &unescape($_); } split(/:/,$listing);
3955: }
3956: if ($listing_results[0] ne 'no_such_dir' &&
3957: $listing_results[0] ne 'empty' &&
3958: $listing_results[0] ne 'con_lost') {
3959: foreach (@listing_results) {
3960: my ($entry,@stat)=split(/&/,$_);
3961: $allusers{$entry}=1;
3962: }
3963: }
3964: }
3965: }
3966: my $alluserstr='';
3967: foreach (sort keys %allusers) {
3968: $alluserstr.=$_.'&user:';
3969: }
3970: $alluserstr=~s/:$//;
3971: return split(/:/,$alluserstr);
3972: } else {
3973: my @emptyResults = ();
3974: push(@emptyResults, 'missing user name');
3975: return split(':',@emptyResults);
3976: }
3977: } elsif(!defined($alternateDirectoryRoot)) {
3978: my $tryserver;
3979: my %alldom=();
3980: foreach $tryserver (keys %libserv) {
3981: $alldom{$hostdom{$tryserver}}=1;
3982: }
3983: my $alldomstr='';
3984: foreach (sort keys %alldom) {
3985: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
3986: }
3987: $alldomstr=~s/:$//;
3988: return split(/:/,$alldomstr);
3989: } else {
3990: my @emptyResults = ();
3991: push(@emptyResults, 'missing domain');
3992: return split(':',@emptyResults);
3993: }
3994: }
3995:
3996: # --------------------------------------------- GetFileTimestamp
3997: # This function utilizes dirlist and returns the date stamp for
3998: # when it was last modified. It will also return an error of -1
3999: # if an error occurs
4000:
4001: ##
4002: ## FIXME: This subroutine assumes its caller knows something about the
4003: ## directory structure of the home server for the student ($root).
4004: ## Not a good assumption to make. Since this is for looking up files
4005: ## in user directories, the full path should be constructed by lond, not
4006: ## whatever machine we request data from.
4007: ##
4008: sub GetFileTimestamp {
4009: my ($studentDomain,$studentName,$filename,$root)=@_;
4010: $studentDomain=~s/\W//g;
4011: $studentName=~s/\W//g;
4012: my $subdir=$studentName.'__';
4013: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4014: my $proname="$studentDomain/$subdir/$studentName";
4015: $proname .= '/'.$filename;
4016: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
4017: $studentName, $root);
4018: my @stats = split('&', $fileStat);
4019: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4020: # @stats contains first the filename, then the stat output
4021: return $stats[10]; # so this is 10 instead of 9.
4022: } else {
4023: return -1;
4024: }
4025: }
4026:
4027: # -------------------------------------------------------- Value of a Condition
4028:
4029: sub directcondval {
4030: my $number=shift;
4031: if (!defined($ENV{'user.state.'.$ENV{'request.course.id'}})) {
4032: &Apache::lonuserstate::evalstate();
4033: }
4034: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
4035: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
4036: } else {
4037: return 2;
4038: }
4039: }
4040:
4041: sub condval {
4042: my $condidx=shift;
4043: my $result=0;
4044: my $allpathcond='';
4045: foreach (split(/\|/,$condidx)) {
4046: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
4047: $allpathcond.=
4048: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
4049: }
4050: }
4051: $allpathcond=~s/\|$//;
4052: if ($ENV{'request.course.id'}) {
4053: if ($allpathcond) {
4054: my $operand='|';
4055: my @stack;
4056: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
4057: if ($_ eq '(') {
4058: push @stack,($operand,$result)
4059: } elsif ($_ eq ')') {
4060: my $before=pop @stack;
4061: if (pop @stack eq '&') {
4062: $result=$result>$before?$before:$result;
4063: } else {
4064: $result=$result>$before?$result:$before;
4065: }
4066: } elsif (($_ eq '&') || ($_ eq '|')) {
4067: $operand=$_;
4068: } else {
4069: my $new=directcondval($_);
4070: if ($operand eq '&') {
4071: $result=$result>$new?$new:$result;
4072: } else {
4073: $result=$result>$new?$result:$new;
4074: }
4075: }
4076: }
4077: }
4078: }
4079: return $result;
4080: }
4081:
4082: # ---------------------------------------------------- Devalidate courseresdata
4083:
4084: sub devalidatecourseresdata {
4085: my ($coursenum,$coursedomain)=@_;
4086: my $hashid=$coursenum.':'.$coursedomain;
4087: &devalidate_cache_new('courseres',$hashid);
4088: }
4089:
4090: # --------------------------------------------------- Course Resourcedata Query
4091:
4092: sub courseresdata {
4093: my ($coursenum,$coursedomain,@which)=@_;
4094: my $coursehom=&homeserver($coursenum,$coursedomain);
4095: my $hashid=$coursenum.':'.$coursedomain;
4096: my ($result,$cached)=&is_cached_new('courseres',$hashid);
4097: unless (defined($cached)) {
4098: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
4099: $result=\%dumpreply;
4100: my ($tmp) = keys(%dumpreply);
4101: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
4102: &do_cache_new('courseres',$hashid,$result,600);
4103: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4104: return $tmp;
4105: } elsif ($tmp =~ /^(error)/) {
4106: $result=undef;
4107: &do_cache_new('courseres',$hashid,$result,600);
4108: }
4109: }
4110: foreach my $item (@which) {
4111: if (defined($result->{$item})) {
4112: return $result->{$item};
4113: }
4114: }
4115: return undef;
4116: }
4117:
4118: #
4119: # EXT resource caching routines
4120: #
4121:
4122: sub clear_EXT_cache_status {
4123: &delenv('cache.EXT.');
4124: }
4125:
4126: sub EXT_cache_status {
4127: my ($target_domain,$target_user) = @_;
4128: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4129: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
4130: # We know already the user has no data
4131: return 1;
4132: } else {
4133: return 0;
4134: }
4135: }
4136:
4137: sub EXT_cache_set {
4138: my ($target_domain,$target_user) = @_;
4139: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4140: &appenv($cachename => time);
4141: }
4142:
4143: # --------------------------------------------------------- Value of a Variable
4144: sub EXT {
4145: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
4146:
4147: unless ($varname) { return ''; }
4148: #get real user name/domain, courseid and symb
4149: my $courseid;
4150: my $publicuser;
4151: if ($symbparm) {
4152: $symbparm=&get_symb_from_alias($symbparm);
4153: }
4154: if (!($uname && $udom)) {
4155: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
4156: &Apache::lonxml::whichuser($symbparm);
4157: if (!$symbparm) { $symbparm=$cursymb; }
4158: } else {
4159: $courseid=$ENV{'request.course.id'};
4160: }
4161: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
4162: my $rest;
4163: if (defined($therest[0])) {
4164: $rest=join('.',@therest);
4165: } else {
4166: $rest='';
4167: }
4168:
4169: my $qualifierrest=$qualifier;
4170: if ($rest) { $qualifierrest.='.'.$rest; }
4171: my $spacequalifierrest=$space;
4172: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
4173: if ($realm eq 'user') {
4174: # --------------------------------------------------------------- user.resource
4175: if ($space eq 'resource') {
4176: if (defined($Apache::lonhomework::parsing_a_problem) ||
4177: defined($Apache::lonhomework::parsing_a_task)) {
4178: return $Apache::lonhomework::history{$qualifierrest};
4179: } else {
4180: my %restored;
4181: if ($publicuser || $ENV{'request.state'} eq 'construct') {
4182: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
4183: } else {
4184: %restored=&restore($symbparm,$courseid,$udom,$uname);
4185: }
4186: return $restored{$qualifierrest};
4187: }
4188: # ----------------------------------------------------------------- user.access
4189: } elsif ($space eq 'access') {
4190: # FIXME - not supporting calls for a specific user
4191: return &allowed($qualifier,$rest);
4192: # ------------------------------------------ user.preferences, user.environment
4193: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
4194: if (($uname eq $ENV{'user.name'}) &&
4195: ($udom eq $ENV{'user.domain'})) {
4196: return $ENV{join('.',('environment',$qualifierrest))};
4197: } else {
4198: my %returnhash;
4199: if (!$publicuser) {
4200: %returnhash=&userenvironment($udom,$uname,
4201: $qualifierrest);
4202: }
4203: return $returnhash{$qualifierrest};
4204: }
4205: # ----------------------------------------------------------------- user.course
4206: } elsif ($space eq 'course') {
4207: # FIXME - not supporting calls for a specific user
4208: return $ENV{join('.',('request.course',$qualifier))};
4209: # ------------------------------------------------------------------- user.role
4210: } elsif ($space eq 'role') {
4211: # FIXME - not supporting calls for a specific user
4212: my ($role,$where)=split(/\./,$ENV{'request.role'});
4213: if ($qualifier eq 'value') {
4214: return $role;
4215: } elsif ($qualifier eq 'extent') {
4216: return $where;
4217: }
4218: # ----------------------------------------------------------------- user.domain
4219: } elsif ($space eq 'domain') {
4220: return $udom;
4221: # ------------------------------------------------------------------- user.name
4222: } elsif ($space eq 'name') {
4223: return $uname;
4224: # ---------------------------------------------------- Any other user namespace
4225: } else {
4226: my %reply;
4227: if (!$publicuser) {
4228: %reply=&get($space,[$qualifierrest],$udom,$uname);
4229: }
4230: return $reply{$qualifierrest};
4231: }
4232: } elsif ($realm eq 'query') {
4233: # ---------------------------------------------- pull stuff out of query string
4234: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
4235: [$spacequalifierrest]);
4236: return $ENV{'form.'.$spacequalifierrest};
4237: } elsif ($realm eq 'request') {
4238: # ------------------------------------------------------------- request.browser
4239: if ($space eq 'browser') {
4240: if ($qualifier eq 'textremote') {
4241: if (&mt('textual_remote_display') eq 'on') {
4242: return 1;
4243: } else {
4244: return 0;
4245: }
4246: } else {
4247: return $ENV{'browser.'.$qualifier};
4248: }
4249: # ------------------------------------------------------------ request.filename
4250: } else {
4251: return $ENV{'request.'.$spacequalifierrest};
4252: }
4253: } elsif ($realm eq 'course') {
4254: # ---------------------------------------------------------- course.description
4255: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
4256: } elsif ($realm eq 'resource') {
4257:
4258: my $section;
4259: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
4260: if (!$symbparm) { $symbparm=&symbread(); }
4261: }
4262: my ($courselevelm,$courselevel);
4263: if ($symbparm && defined($courseid) &&
4264: $courseid eq $ENV{'request.course.id'}) {
4265:
4266: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
4267:
4268: # ----------------------------------------------------- Cascading lookup scheme
4269: my $symbp=$symbparm;
4270: my $mapp=(&decode_symb($symbp))[0];
4271:
4272: my $symbparm=$symbp.'.'.$spacequalifierrest;
4273: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
4274:
4275: if (($ENV{'user.name'} eq $uname) &&
4276: ($ENV{'user.domain'} eq $udom)) {
4277: $section=$ENV{'request.course.sec'};
4278: } else {
4279: if (! defined($usection)) {
4280: $section=&getsection($udom,$uname,$courseid);
4281: } else {
4282: $section = $usection;
4283: }
4284: }
4285:
4286: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
4287: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
4288: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
4289:
4290: $courselevel=$courseid.'.'.$spacequalifierrest;
4291: my $courselevelr=$courseid.'.'.$symbparm;
4292: $courselevelm=$courseid.'.'.$mapparm;
4293:
4294: # ----------------------------------------------------------- first, check user
4295: #most student don\'t have any data set, check if there is some data
4296: if (! &EXT_cache_status($udom,$uname)) {
4297: my $hashid="$udom:$uname";
4298: my ($result,$cached)=&is_cached_new('userres',$hashid);
4299: if (!defined($cached)) {
4300: my %resourcedata=&dump('resourcedata',$udom,$uname);
4301: $result=\%resourcedata;
4302: &do_cache_new('userres',$hashid,$result);
4303: }
4304: my ($tmp)=keys(%$result);
4305: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4306: if ($$result{$courselevelr}) {
4307: return $$result{$courselevelr}; }
4308: if ($$result{$courselevelm}) {
4309: return $$result{$courselevelm}; }
4310: if ($$result{$courselevel}) {
4311: return $$result{$courselevel}; }
4312: } else {
4313: #error 2 occurs when the .db doesn't exist
4314: if ($tmp!~/error: 2 /) {
4315: &logthis("<font color=blue>WARNING:".
4316: " Trying to get resource data for ".
4317: $uname." at ".$udom.": ".
4318: $tmp."</font>");
4319: } elsif ($tmp=~/error: 2 /) {
4320: &EXT_cache_set($udom,$uname);
4321: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4322: return $tmp;
4323: }
4324: }
4325: }
4326:
4327: # ------------------------------------------------ second, check some of course
4328:
4329: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
4330: $ENV{'course.'.$courseid.'.domain'},
4331: ($seclevelr,$seclevelm,$seclevel,
4332: $courselevelr));
4333: if (defined($coursereply)) { return $coursereply; }
4334:
4335: # ------------------------------------------------------ third, check map parms
4336: my %parmhash=();
4337: my $thisparm='';
4338: if (tie(%parmhash,'GDBM_File',
4339: $ENV{'request.course.fn'}.'_parms.db',
4340: &GDBM_READER(),0640)) {
4341: $thisparm=$parmhash{$symbparm};
4342: untie(%parmhash);
4343: }
4344: if ($thisparm) { return $thisparm; }
4345: }
4346: # ------------------------------------------ fourth, look in resource metadata
4347:
4348: $spacequalifierrest=~s/\./\_/;
4349: my $filename;
4350: if (!$symbparm) { $symbparm=&symbread(); }
4351: if ($symbparm) {
4352: $filename=(&decode_symb($symbparm))[2];
4353: } else {
4354: $filename=$ENV{'request.filename'};
4355: }
4356: my $metadata=&metadata($filename,$spacequalifierrest);
4357: if (defined($metadata)) { return $metadata; }
4358: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
4359: if (defined($metadata)) { return $metadata; }
4360:
4361: # ---------------------------------------------- fourth, look in rest pf course
4362: if ($symbparm && defined($courseid) &&
4363: $courseid eq $ENV{'request.course.id'}) {
4364: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
4365: $ENV{'course.'.$courseid.'.domain'},
4366: ($courselevelm,$courselevel));
4367: if (defined($coursereply)) { return $coursereply; }
4368: }
4369: # ------------------------------------------------------------------ Cascade up
4370: unless ($space eq '0') {
4371: my @parts=split(/_/,$space);
4372: my $id=pop(@parts);
4373: my $part=join('_',@parts);
4374: if ($part eq '') { $part='0'; }
4375: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
4376: $symbparm,$udom,$uname,$section,1);
4377: if (defined($partgeneral)) { return $partgeneral; }
4378: }
4379: if ($recurse) { return undef; }
4380: my $pack_def=&packages_tab_default($filename,$varname);
4381: if (defined($pack_def)) { return $pack_def; }
4382:
4383: # ---------------------------------------------------- Any other user namespace
4384: } elsif ($realm eq 'environment') {
4385: # ----------------------------------------------------------------- environment
4386: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
4387: return $ENV{'environment.'.$spacequalifierrest};
4388: } else {
4389: my %returnhash=&userenvironment($udom,$uname,
4390: $spacequalifierrest);
4391: return $returnhash{$spacequalifierrest};
4392: }
4393: } elsif ($realm eq 'system') {
4394: # ----------------------------------------------------------------- system.time
4395: if ($space eq 'time') {
4396: return time;
4397: }
4398: }
4399: return '';
4400: }
4401:
4402: sub packages_tab_default {
4403: my ($uri,$varname)=@_;
4404: my (undef,$part,$name)=split(/\./,$varname);
4405: my $packages=&metadata($uri,'packages');
4406: foreach my $package (split(/,/,$packages)) {
4407: my ($pack_type,$pack_part)=split(/_/,$package,2);
4408: if (defined($packagetab{"$pack_type&$name&default"})) {
4409: return $packagetab{"$pack_type&$name&default"};
4410: }
4411: if ($pack_type eq 'part') { $pack_part='0'; }
4412: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
4413: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
4414: }
4415: }
4416: return undef;
4417: }
4418:
4419: sub add_prefix_and_part {
4420: my ($prefix,$part)=@_;
4421: my $keyroot;
4422: if (defined($prefix) && $prefix !~ /^__/) {
4423: # prefix that has a part already
4424: $keyroot=$prefix;
4425: } elsif (defined($prefix)) {
4426: # prefix that is missing a part
4427: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
4428: } else {
4429: # no prefix at all
4430: if (defined($part)) { $keyroot='_'.$part; }
4431: }
4432: return $keyroot;
4433: }
4434:
4435: # ---------------------------------------------------------------- Get metadata
4436:
4437: my %metaentry;
4438: sub metadata {
4439: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
4440: $uri=&declutter($uri);
4441: # if it is a non metadata possible uri return quickly
4442: if (($uri eq '') ||
4443: (($uri =~ m|^/*adm/|) &&
4444: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
4445: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
4446: ($uri =~ m|home/[^/]+/public_html/|)) {
4447: return undef;
4448: }
4449: my $filename=$uri;
4450: $uri=~s/\.meta$//;
4451: #
4452: # Is the metadata already cached?
4453: # Look at timestamp of caching
4454: # Everything is cached by the main uri, libraries are never directly cached
4455: #
4456: if (!defined($liburi)) {
4457: my ($result,$cached)=&is_cached_new('meta',$uri);
4458: if (defined($cached)) { return $result->{':'.$what}; }
4459: }
4460: {
4461: #
4462: # Is this a recursive call for a library?
4463: #
4464: # if (! exists($metacache{$uri})) {
4465: # $metacache{$uri}={};
4466: # }
4467: if ($liburi) {
4468: $liburi=&declutter($liburi);
4469: $filename=$liburi;
4470: } else {
4471: &devalidate_cache_new('meta',$uri);
4472: undef(%metaentry);
4473: }
4474: my %metathesekeys=();
4475: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
4476: my $metastring;
4477: if ($uri !~ m -^(uploaded|editupload)/-) {
4478: my $file=&filelocation('',&clutter($filename));
4479: #push(@{$metaentry{$uri.'.file'}},$file);
4480: $metastring=&getfile($file);
4481: }
4482: my $parser=HTML::LCParser->new(\$metastring);
4483: my $token;
4484: undef %metathesekeys;
4485: while ($token=$parser->get_token) {
4486: if ($token->[0] eq 'S') {
4487: if (defined($token->[2]->{'package'})) {
4488: #
4489: # This is a package - get package info
4490: #
4491: my $package=$token->[2]->{'package'};
4492: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4493: if (defined($token->[2]->{'id'})) {
4494: $keyroot.='_'.$token->[2]->{'id'};
4495: }
4496: if ($metaentry{':packages'}) {
4497: $metaentry{':packages'}.=','.$package.$keyroot;
4498: } else {
4499: $metaentry{':packages'}=$package.$keyroot;
4500: }
4501: foreach (sort keys %packagetab) {
4502: my $part=$keyroot;
4503: $part=~s/^\_//;
4504: if ($_=~/^\Q$package\E\&/ ||
4505: $_=~/^\Q$package\E_0\&/) {
4506: my ($pack,$name,$subp)=split(/\&/,$_);
4507: # ignore package.tab specified default values
4508: # here &package_tab_default() will fetch those
4509: if ($subp eq 'default') { next; }
4510: my $value=$packagetab{$_};
4511: my $unikey;
4512: if ($pack =~ /_0$/) {
4513: $unikey='parameter_0_'.$name;
4514: $part=0;
4515: } else {
4516: $unikey='parameter'.$keyroot.'_'.$name;
4517: }
4518: if ($subp eq 'display') {
4519: $value.=' [Part: '.$part.']';
4520: }
4521: $metaentry{':'.$unikey.'.part'}=$part;
4522: $metathesekeys{$unikey}=1;
4523: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
4524: $metaentry{':'.$unikey.'.'.$subp}=$value;
4525: }
4526: if (defined($metaentry{':'.$unikey.'.default'})) {
4527: $metaentry{':'.$unikey}=
4528: $metaentry{':'.$unikey.'.default'};
4529: }
4530: }
4531: }
4532: } else {
4533: #
4534: # This is not a package - some other kind of start tag
4535: #
4536: my $entry=$token->[1];
4537: my $unikey;
4538: if ($entry eq 'import') {
4539: $unikey='';
4540: } else {
4541: $unikey=$entry;
4542: }
4543: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4544:
4545: if (defined($token->[2]->{'id'})) {
4546: $unikey.='_'.$token->[2]->{'id'};
4547: }
4548:
4549: if ($entry eq 'import') {
4550: #
4551: # Importing a library here
4552: #
4553: if ($depthcount<20) {
4554: my $location=$parser->get_text('/import');
4555: my $dir=$filename;
4556: $dir=~s|[^/]*$||;
4557: $location=&filelocation($dir,$location);
4558: foreach (sort(split(/\,/,&metadata($uri,'keys',
4559: $location,$unikey,
4560: $depthcount+1)))) {
4561: $metaentry{':'.$_}=$metaentry{':'.$_};
4562: $metathesekeys{$_}=1;
4563: }
4564: }
4565: } else {
4566:
4567: if (defined($token->[2]->{'name'})) {
4568: $unikey.='_'.$token->[2]->{'name'};
4569: }
4570: $metathesekeys{$unikey}=1;
4571: foreach (@{$token->[3]}) {
4572: $metaentry{':'.$unikey.'.'.$_}=$token->[2]->{$_};
4573: }
4574: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
4575: my $default=$metaentry{':'.$unikey.'.default'};
4576: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
4577: # only ws inside the tag, and not in default, so use default
4578: # as value
4579: $metaentry{':'.$unikey}=$default;
4580: } else {
4581: # either something interesting inside the tag or default
4582: # uninteresting
4583: $metaentry{':'.$unikey}=$internaltext;
4584: }
4585: # end of not-a-package not-a-library import
4586: }
4587: # end of not-a-package start tag
4588: }
4589: # the next is the end of "start tag"
4590: }
4591: }
4592: my ($extension) = ($uri =~ /\.(\w+)$/);
4593: foreach my $key (sort(keys(%packagetab))) {
4594: #&logthis("extsion1 $extension $key !!");
4595: #no specific packages #how's our extension
4596: if ($key!~/^extension_\Q$extension\E&/) { next; }
4597: &metadata_create_package_def($uri,$key,'extension_'.$extension,
4598: \%metathesekeys);
4599: }
4600: if (!exists($metaentry{':packages'})) {
4601: foreach my $key (sort(keys(%packagetab))) {
4602: #no specific packages well let's get default then
4603: if ($key!~/^default&/) { next; }
4604: &metadata_create_package_def($uri,$key,'default',
4605: \%metathesekeys);
4606: }
4607: }
4608: # are there custom rights to evaluate
4609: if ($metaentry{':copyright'} eq 'custom') {
4610:
4611: #
4612: # Importing a rights file here
4613: #
4614: unless ($depthcount) {
4615: my $location=$metaentry{':customdistributionfile'};
4616: my $dir=$filename;
4617: $dir=~s|[^/]*$||;
4618: $location=&filelocation($dir,$location);
4619: foreach (sort(split(/\,/,&metadata($uri,'keys',
4620: $location,'_rights',
4621: $depthcount+1)))) {
4622: #$metaentry{':'.$_}=$metacache{$uri}->{':'.$_};
4623: $metathesekeys{$_}=1;
4624: }
4625: }
4626: }
4627: $metaentry{':keys'}=join(',',keys %metathesekeys);
4628: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
4629: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
4630: &do_cache_new('meta',$uri,\%metaentry);
4631: # this is the end of "was not already recently cached
4632: }
4633: return $metaentry{':'.$what};
4634: }
4635:
4636: sub metadata_create_package_def {
4637: my ($uri,$key,$package,$metathesekeys)=@_;
4638: my ($pack,$name,$subp)=split(/\&/,$key);
4639: if ($subp eq 'default') { next; }
4640:
4641: if (defined($metaentry{':packages'})) {
4642: $metaentry{':packages'}.=','.$package;
4643: } else {
4644: $metaentry{':packages'}=$package;
4645: }
4646: my $value=$packagetab{$key};
4647: my $unikey;
4648: $unikey='parameter_0_'.$name;
4649: $metaentry{':'.$unikey.'.part'}=0;
4650: $$metathesekeys{$unikey}=1;
4651: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
4652: $metaentry{':'.$unikey.'.'.$subp}=$value;
4653: }
4654: if (defined($metaentry{':'.$unikey.'.default'})) {
4655: $metaentry{':'.$unikey}=
4656: $metaentry{':'.$unikey.'.default'};
4657: }
4658: }
4659:
4660: sub metadata_generate_part0 {
4661: my ($metadata,$metacache,$uri) = @_;
4662: my %allnames;
4663: foreach my $metakey (sort keys %$metadata) {
4664: if ($metakey=~/^parameter\_(.*)/) {
4665: my $part=$$metacache{':'.$metakey.'.part'};
4666: my $name=$$metacache{':'.$metakey.'.name'};
4667: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
4668: $allnames{$name}=$part;
4669: }
4670: }
4671: }
4672: foreach my $name (keys(%allnames)) {
4673: $$metadata{"parameter_0_$name"}=1;
4674: my $key=":parameter_0_$name";
4675: $$metacache{"$key.part"}='0';
4676: $$metacache{"$key.name"}=$name;
4677: $$metacache{"$key.type"}=$$metacache{':parameter_'.
4678: $allnames{$name}.'_'.$name.
4679: '.type'};
4680: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
4681: '.display'};
4682: my $expr='\\[Part: '.$allnames{$name}.'\\]';
4683: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
4684: $$metacache{"$key.display"}=$olddis;
4685: }
4686: }
4687:
4688: # ------------------------------------------------- Get the title of a resource
4689:
4690: sub gettitle {
4691: my $urlsymb=shift;
4692: my $symb=&symbread($urlsymb);
4693: if ($symb) {
4694: my $key=$ENV{'request.course.id'}."\0".$symb;
4695: my ($result,$cached)=&is_cached_new('title',$key);
4696: if (defined($cached)) {
4697: return $result;
4698: }
4699: my ($map,$resid,$url)=&decode_symb($symb);
4700: my $title='';
4701: my %bighash;
4702: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4703: &GDBM_READER(),0640)) {
4704: my $mapid=$bighash{'map_pc_'.&clutter($map)};
4705: $title=$bighash{'title_'.$mapid.'.'.$resid};
4706: untie %bighash;
4707: }
4708: $title=~s/\&colon\;/\:/gs;
4709: if ($title) {
4710: return &do_cache_new('title',$key,$title,600);
4711: }
4712: $urlsymb=$url;
4713: }
4714: my $title=&metadata($urlsymb,'title');
4715: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
4716: return $title;
4717: }
4718:
4719: sub get_slot {
4720: my ($which,$cnum,$cdom)=@_;
4721: if (!$cnum || !$cdom) {
4722: (undef,my $courseid)=&Apache::lonxml::whichuser();
4723: $cdom=$ENV{'course.'.$courseid.'.domain'};
4724: $cnum=$ENV{'course.'.$courseid.'.num'};
4725: }
4726: my %slotinfo=&get('slots',[$which],$cdom,$cnum);
4727: &Apache::lonhomework::showhash(%slotinfo);
4728: my ($tmp)=keys(%slotinfo);
4729: if ($tmp=~/^error:/) { return (); }
4730: if (ref($slotinfo{$which}) eq 'HASH') {
4731: return %{$slotinfo{$which}};
4732: }
4733: return $slotinfo{$which};
4734: }
4735: # ------------------------------------------------- Update symbolic store links
4736:
4737: sub symblist {
4738: my ($mapname,%newhash)=@_;
4739: $mapname=&deversion(&declutter($mapname));
4740: my %hash;
4741: if (($ENV{'request.course.fn'}) && (%newhash)) {
4742: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4743: &GDBM_WRCREAT(),0640)) {
4744: foreach (keys %newhash) {
4745: $hash{declutter($_)}=&encode_symb($mapname,$newhash{$_}->[1],
4746: $newhash{$_}->[0]);
4747: }
4748: if (untie(%hash)) {
4749: return 'ok';
4750: }
4751: }
4752: }
4753: return 'error';
4754: }
4755:
4756: # --------------------------------------------------------------- Verify a symb
4757:
4758: sub symbverify {
4759: my ($symb,$thisurl)=@_;
4760: my $thisfn=$thisurl;
4761: # wrapper not part of symbs
4762: $thisfn=~s/^\/adm\/wrapper//;
4763: $thisfn=&declutter($thisfn);
4764: # direct jump to resource in page or to a sequence - will construct own symbs
4765: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
4766: # check URL part
4767: my ($map,$resid,$url)=&decode_symb($symb);
4768:
4769: unless ($url eq $thisfn) { return 0; }
4770:
4771: $symb=&symbclean($symb);
4772: $thisurl=&deversion($thisurl);
4773: $thisfn=&deversion($thisfn);
4774:
4775: my %bighash;
4776: my $okay=0;
4777:
4778: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4779: &GDBM_READER(),0640)) {
4780: my $ids=$bighash{'ids_'.&clutter($thisurl)};
4781: unless ($ids) {
4782: $ids=$bighash{'ids_/'.$thisurl};
4783: }
4784: if ($ids) {
4785: # ------------------------------------------------------------------- Has ID(s)
4786: foreach (split(/\,/,$ids)) {
4787: my ($mapid,$resid)=split(/\./,$_);
4788: if (
4789: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
4790: eq $symb) {
4791: if (($ENV{'request.role.adv'}) ||
4792: $bighash{'encrypted_'.$_} eq $ENV{'request.enc'}) {
4793: $okay=1;
4794: }
4795: }
4796: }
4797: }
4798: untie(%bighash);
4799: }
4800: return $okay;
4801: }
4802:
4803: # --------------------------------------------------------------- Clean-up symb
4804:
4805: sub symbclean {
4806: my $symb=shift;
4807: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
4808: # remove version from map
4809: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
4810:
4811: # remove version from URL
4812: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
4813:
4814: # remove wrapper
4815:
4816: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
4817: return $symb;
4818: }
4819:
4820: # ---------------------------------------------- Split symb to find map and url
4821:
4822: sub encode_symb {
4823: my ($map,$resid,$url)=@_;
4824: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
4825: }
4826:
4827: sub decode_symb {
4828: my $symb=shift;
4829: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
4830: my ($map,$resid,$url)=split(/___/,$symb);
4831: return (&fixversion($map),$resid,&fixversion($url));
4832: }
4833:
4834: sub fixversion {
4835: my $fn=shift;
4836: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
4837: my %bighash;
4838: my $uri=&clutter($fn);
4839: my $key=$ENV{'request.course.id'}.'_'.$uri;
4840: # is this cached?
4841: my ($result,$cached)=&is_cached_new('courseresversion',$key);
4842: if (defined($cached)) { return $result; }
4843: # unfortunately not cached, or expired
4844: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4845: &GDBM_READER(),0640)) {
4846: if ($bighash{'version_'.$uri}) {
4847: my $version=$bighash{'version_'.$uri};
4848: unless (($version eq 'mostrecent') ||
4849: ($version==&getversion($uri))) {
4850: $uri=~s/\.(\w+)$/\.$version\.$1/;
4851: }
4852: }
4853: untie %bighash;
4854: }
4855: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
4856: }
4857:
4858: sub deversion {
4859: my $url=shift;
4860: $url=~s/\.\d+\.(\w+)$/\.$1/;
4861: return $url;
4862: }
4863:
4864: # ------------------------------------------------------ Return symb list entry
4865:
4866: sub symbread {
4867: my ($thisfn,$donotrecurse)=@_;
4868: my $cache_str='request.symbread.cached.'.$thisfn;
4869: if (defined($ENV{$cache_str})) { return $ENV{$cache_str}; }
4870: # no filename provided? try from environment
4871: unless ($thisfn) {
4872: if ($ENV{'request.symb'}) {
4873: return $ENV{$cache_str}=&symbclean($ENV{'request.symb'});
4874: }
4875: $thisfn=$ENV{'request.filename'};
4876: }
4877: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
4878: # is that filename actually a symb? Verify, clean, and return
4879: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
4880: if (&symbverify($thisfn,$1)) {
4881: return $ENV{$cache_str}=&symbclean($thisfn);
4882: }
4883: }
4884: $thisfn=declutter($thisfn);
4885: my %hash;
4886: my %bighash;
4887: my $syval='';
4888: if (($ENV{'request.course.fn'}) && ($thisfn)) {
4889: my $targetfn = $thisfn;
4890: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
4891: $targetfn = 'adm/wrapper/'.$thisfn;
4892: }
4893: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4894: &GDBM_READER(),0640)) {
4895: $syval=$hash{$targetfn};
4896: untie(%hash);
4897: }
4898: # ---------------------------------------------------------- There was an entry
4899: if ($syval) {
4900: #unless ($syval=~/\_\d+$/) {
4901: #unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
4902: #&appenv('request.ambiguous' => $thisfn);
4903: #return $ENV{$cache_str}='';
4904: #}
4905: #$syval.=$1;
4906: #}
4907: } else {
4908: # ------------------------------------------------------- Was not in symb table
4909: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4910: &GDBM_READER(),0640)) {
4911: # ---------------------------------------------- Get ID(s) for current resource
4912: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4913: unless ($ids) {
4914: $ids=$bighash{'ids_/'.$thisfn};
4915: }
4916: unless ($ids) {
4917: # alias?
4918: $ids=$bighash{'mapalias_'.$thisfn};
4919: }
4920: if ($ids) {
4921: # ------------------------------------------------------------------- Has ID(s)
4922: my @possibilities=split(/\,/,$ids);
4923: if ($#possibilities==0) {
4924: # ----------------------------------------------- There is only one possibility
4925: my ($mapid,$resid)=split(/\./,$ids);
4926: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
4927: } elsif (!$donotrecurse) {
4928: # ------------------------------------------ There is more than one possibility
4929: my $realpossible=0;
4930: foreach (@possibilities) {
4931: my $file=$bighash{'src_'.$_};
4932: if (&allowed('bre',$file)) {
4933: my ($mapid,$resid)=split(/\./,$_);
4934: if ($bighash{'map_type_'.$mapid} ne 'page') {
4935: $realpossible++;
4936: $syval=declutter($bighash{'map_id_'.$mapid}).
4937: '___'.$resid;
4938: }
4939: }
4940: }
4941: if ($realpossible!=1) { $syval=''; }
4942: } else {
4943: $syval='';
4944: }
4945: }
4946: untie(%bighash)
4947: }
4948: }
4949: if ($syval) {
4950: return $ENV{$cache_str}=$syval;
4951: #return $ENV{$cache_str}=&symbclean($syval.'___'.$thisfn);
4952: }
4953: }
4954: &appenv('request.ambiguous' => $thisfn);
4955: return $ENV{$cache_str}='';
4956: }
4957:
4958: # ---------------------------------------------------------- Return random seed
4959:
4960: sub numval {
4961: my $txt=shift;
4962: $txt=~tr/A-J/0-9/;
4963: $txt=~tr/a-j/0-9/;
4964: $txt=~tr/K-T/0-9/;
4965: $txt=~tr/k-t/0-9/;
4966: $txt=~tr/U-Z/0-5/;
4967: $txt=~tr/u-z/0-5/;
4968: $txt=~s/\D//g;
4969: if ($_64bit) { if ($txt > 2**32) { return -1; } }
4970: return int($txt);
4971: }
4972:
4973: sub numval2 {
4974: my $txt=shift;
4975: $txt=~tr/A-J/0-9/;
4976: $txt=~tr/a-j/0-9/;
4977: $txt=~tr/K-T/0-9/;
4978: $txt=~tr/k-t/0-9/;
4979: $txt=~tr/U-Z/0-5/;
4980: $txt=~tr/u-z/0-5/;
4981: $txt=~s/\D//g;
4982: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
4983: my $total;
4984: foreach my $val (@txts) { $total+=$val; }
4985: if ($_64bit) { if ($total > 2**32) { return -1; } }
4986: return int($total);
4987: }
4988:
4989: sub numval3 {
4990: use integer;
4991: my $txt=shift;
4992: $txt=~tr/A-J/0-9/;
4993: $txt=~tr/a-j/0-9/;
4994: $txt=~tr/K-T/0-9/;
4995: $txt=~tr/k-t/0-9/;
4996: $txt=~tr/U-Z/0-5/;
4997: $txt=~tr/u-z/0-5/;
4998: $txt=~s/\D//g;
4999: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5000: my $total;
5001: foreach my $val (@txts) { $total+=$val; }
5002: if ($_64bit) { $total=(($total<<32)>>32); }
5003: return $total;
5004: }
5005:
5006: sub latest_rnd_algorithm_id {
5007: return '64bit4';
5008: }
5009:
5010: sub get_rand_alg {
5011: my ($courseid)=@_;
5012: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
5013: if ($courseid) {
5014: return $ENV{"course.$courseid.rndseed"};
5015: }
5016: return &latest_rnd_algorithm_id();
5017: }
5018:
5019: sub validCODE {
5020: my ($CODE)=@_;
5021: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
5022: return 0;
5023: }
5024:
5025: sub getCODE {
5026: if (&validCODE($ENV{'form.CODE'})) { return $ENV{'form.CODE'}; }
5027: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
5028: defined($Apache::lonhomework::parsing_a_task) ) &&
5029: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
5030: return $Apache::lonhomework::history{'resource.CODE'};
5031: }
5032: return undef;
5033: }
5034:
5035: sub rndseed {
5036: my ($symb,$courseid,$domain,$username)=@_;
5037:
5038: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
5039: if (!$symb) {
5040: unless ($symb=$wsymb) { return time; }
5041: }
5042: if (!$courseid) { $courseid=$wcourseid; }
5043: if (!$domain) { $domain=$wdomain; }
5044: if (!$username) { $username=$wusername }
5045: my $which=&get_rand_alg();
5046: if (defined(&getCODE())) {
5047: if ($which eq '64bit4') {
5048: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
5049: } else {
5050: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
5051: }
5052: } elsif ($which eq '64bit4') {
5053: return &rndseed_64bit4($symb,$courseid,$domain,$username);
5054: } elsif ($which eq '64bit3') {
5055: return &rndseed_64bit3($symb,$courseid,$domain,$username);
5056: } elsif ($which eq '64bit2') {
5057: return &rndseed_64bit2($symb,$courseid,$domain,$username);
5058: } elsif ($which eq '64bit') {
5059: return &rndseed_64bit($symb,$courseid,$domain,$username);
5060: }
5061: return &rndseed_32bit($symb,$courseid,$domain,$username);
5062: }
5063:
5064: sub rndseed_32bit {
5065: my ($symb,$courseid,$domain,$username)=@_;
5066: {
5067: use integer;
5068: my $symbchck=unpack("%32C*",$symb) << 27;
5069: my $symbseed=numval($symb) << 22;
5070: my $namechck=unpack("%32C*",$username) << 17;
5071: my $nameseed=numval($username) << 12;
5072: my $domainseed=unpack("%32C*",$domain) << 7;
5073: my $courseseed=unpack("%32C*",$courseid);
5074: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
5075: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5076: #&Apache::lonxml::debug("rndseed :$num:$symb");
5077: if ($_64bit) { $num=(($num<<32)>>32); }
5078: return $num;
5079: }
5080: }
5081:
5082: sub rndseed_64bit {
5083: my ($symb,$courseid,$domain,$username)=@_;
5084: {
5085: use integer;
5086: my $symbchck=unpack("%32S*",$symb) << 21;
5087: my $symbseed=numval($symb) << 10;
5088: my $namechck=unpack("%32S*",$username);
5089:
5090: my $nameseed=numval($username) << 21;
5091: my $domainseed=unpack("%32S*",$domain) << 10;
5092: my $courseseed=unpack("%32S*",$courseid);
5093:
5094: my $num1=$symbchck+$symbseed+$namechck;
5095: my $num2=$nameseed+$domainseed+$courseseed;
5096: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5097: #&Apache::lonxml::debug("rndseed :$num:$symb");
5098: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5099: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5100: return "$num1,$num2";
5101: }
5102: }
5103:
5104: sub rndseed_64bit2 {
5105: my ($symb,$courseid,$domain,$username)=@_;
5106: {
5107: use integer;
5108: # strings need to be an even # of cahracters long, it it is odd the
5109: # last characters gets thrown away
5110: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5111: my $symbseed=numval($symb) << 10;
5112: my $namechck=unpack("%32S*",$username.' ');
5113:
5114: my $nameseed=numval($username) << 21;
5115: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5116: my $courseseed=unpack("%32S*",$courseid.' ');
5117:
5118: my $num1=$symbchck+$symbseed+$namechck;
5119: my $num2=$nameseed+$domainseed+$courseseed;
5120: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5121: #&Apache::lonxml::debug("rndseed :$num:$symb");
5122: return "$num1,$num2";
5123: }
5124: }
5125:
5126: sub rndseed_64bit3 {
5127: my ($symb,$courseid,$domain,$username)=@_;
5128: {
5129: use integer;
5130: # strings need to be an even # of cahracters long, it it is odd the
5131: # last characters gets thrown away
5132: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5133: my $symbseed=numval2($symb) << 10;
5134: my $namechck=unpack("%32S*",$username.' ');
5135:
5136: my $nameseed=numval2($username) << 21;
5137: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5138: my $courseseed=unpack("%32S*",$courseid.' ');
5139:
5140: my $num1=$symbchck+$symbseed+$namechck;
5141: my $num2=$nameseed+$domainseed+$courseseed;
5142: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5143: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5144: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5145:
5146: return "$num1:$num2";
5147: }
5148: }
5149:
5150: sub rndseed_64bit4 {
5151: my ($symb,$courseid,$domain,$username)=@_;
5152: {
5153: use integer;
5154: # strings need to be an even # of cahracters long, it it is odd the
5155: # last characters gets thrown away
5156: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5157: my $symbseed=numval3($symb) << 10;
5158: my $namechck=unpack("%32S*",$username.' ');
5159:
5160: my $nameseed=numval3($username) << 21;
5161: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5162: my $courseseed=unpack("%32S*",$courseid.' ');
5163:
5164: my $num1=$symbchck+$symbseed+$namechck;
5165: my $num2=$nameseed+$domainseed+$courseseed;
5166: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5167: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5168: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5169:
5170: return "$num1:$num2";
5171: }
5172: }
5173:
5174: sub rndseed_CODE_64bit {
5175: my ($symb,$courseid,$domain,$username)=@_;
5176: {
5177: use integer;
5178: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5179: my $symbseed=numval2($symb);
5180: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5181: my $CODEseed=numval(&getCODE());
5182: my $courseseed=unpack("%32S*",$courseid.' ');
5183: my $num1=$symbseed+$CODEchck;
5184: my $num2=$CODEseed+$courseseed+$symbchck;
5185: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5186: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5187: if ($_64bit) { $num1=(($num1<<32)>>32); }
5188: if ($_64bit) { $num2=(($num2<<32)>>32); }
5189: return "$num1:$num2";
5190: }
5191: }
5192:
5193: sub rndseed_CODE_64bit4 {
5194: my ($symb,$courseid,$domain,$username)=@_;
5195: {
5196: use integer;
5197: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5198: my $symbseed=numval3($symb);
5199: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5200: my $CODEseed=numval3(&getCODE());
5201: my $courseseed=unpack("%32S*",$courseid.' ');
5202: my $num1=$symbseed+$CODEchck;
5203: my $num2=$CODEseed+$courseseed+$symbchck;
5204: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5205: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5206: if ($_64bit) { $num1=(($num1<<32)>>32); }
5207: if ($_64bit) { $num2=(($num2<<32)>>32); }
5208: return "$num1:$num2";
5209: }
5210: }
5211:
5212: sub setup_random_from_rndseed {
5213: my ($rndseed)=@_;
5214: if ($rndseed =~/([,:])/) {
5215: my ($num1,$num2)=split(/[,:]/,$rndseed);
5216: &Math::Random::random_set_seed(abs($num1),abs($num2));
5217: } else {
5218: &Math::Random::random_set_seed_from_phrase($rndseed);
5219: }
5220: }
5221:
5222: sub latest_receipt_algorithm_id {
5223: return 'receipt2';
5224: }
5225:
5226: sub recunique {
5227: my $fucourseid=shift;
5228: my $unique;
5229: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5230: $unique=$ENV{"course.$fucourseid.internal.encseed"};
5231: } else {
5232: $unique=$perlvar{'lonReceipt'};
5233: }
5234: return unpack("%32C*",$unique);
5235: }
5236:
5237: sub recprefix {
5238: my $fucourseid=shift;
5239: my $prefix;
5240: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5241: $prefix=$ENV{"course.$fucourseid.internal.encpref"};
5242: } else {
5243: $prefix=$perlvar{'lonHostID'};
5244: }
5245: return unpack("%32C*",$prefix);
5246: }
5247:
5248: sub ireceipt {
5249: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
5250: my $cuname=unpack("%32C*",$funame);
5251: my $cudom=unpack("%32C*",$fudom);
5252: my $cucourseid=unpack("%32C*",$fucourseid);
5253: my $cusymb=unpack("%32C*",$fusymb);
5254: my $cunique=&recunique($fucourseid);
5255: my $cpart=unpack("%32S*",$part);
5256: my $return =&recprefix($fucourseid).'-';
5257: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
5258: $ENV{'request.state'} eq 'construct') {
5259: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
5260: " and ".($cpart%$cudom));
5261:
5262: $return.= ($cunique%$cuname+
5263: $cunique%$cudom+
5264: $cusymb%$cuname+
5265: $cusymb%$cudom+
5266: $cucourseid%$cuname+
5267: $cucourseid%$cudom+
5268: $cpart%$cuname+
5269: $cpart%$cudom);
5270: } else {
5271: $return.= ($cunique%$cuname+
5272: $cunique%$cudom+
5273: $cusymb%$cuname+
5274: $cusymb%$cudom+
5275: $cucourseid%$cuname+
5276: $cucourseid%$cudom);
5277: }
5278: return $return;
5279: }
5280:
5281: sub receipt {
5282: my ($part)=@_;
5283: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
5284: return &ireceipt($name,$domain,$courseid,$symb,$part);
5285: }
5286:
5287: # ------------------------------------------------------------ Serves up a file
5288: # returns either the contents of the file or
5289: # -1 if the file doesn't exist
5290: #
5291: # if the target is a file that was uploaded via DOCS,
5292: # a check will be made to see if a current copy exists on the local server,
5293: # if it does this will be served, otherwise a copy will be retrieved from
5294: # the home server for the course and stored in /home/httpd/html/userfiles on
5295: # the local server.
5296:
5297: sub getfile {
5298: my ($file) = @_;
5299: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
5300: &repcopy($file);
5301: return &readfile($file);
5302: }
5303:
5304: sub repcopy_userfile {
5305: my ($file)=@_;
5306: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
5307: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
5308: my ($cdom,$cnum,$filename) =
5309: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
5310: my ($info,$rtncode);
5311: my $uri="/uploaded/$cdom/$cnum/$filename";
5312: if (-e "$file") {
5313: my @fileinfo = stat($file);
5314: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
5315: if ($lwpresp ne 'ok') {
5316: if ($rtncode eq '404') {
5317: unlink($file);
5318: }
5319: #my $ua=new LWP::UserAgent;
5320: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5321: #my $response=$ua->request($request);
5322: #if ($response->is_success()) {
5323: # return $response->content;
5324: # } else {
5325: # return -1;
5326: # }
5327: return -1;
5328: }
5329: if ($info < $fileinfo[9]) {
5330: return 'ok';
5331: }
5332: $info = '';
5333: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5334: if ($lwpresp ne 'ok') {
5335: return -1;
5336: }
5337: } else {
5338: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5339: if ($lwpresp ne 'ok') {
5340: my $ua=new LWP::UserAgent;
5341: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5342: my $response=$ua->request($request);
5343: if ($response->is_success()) {
5344: $info=$response->content;
5345: } else {
5346: return -1;
5347: }
5348: }
5349: my @parts = ($cdom,$cnum);
5350: if ($filename =~ m|^(.+)/[^/]+$|) {
5351: push @parts, split(/\//,$1);
5352: }
5353: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
5354: foreach my $part (@parts) {
5355: $path .= '/'.$part;
5356: if (!-e $path) {
5357: mkdir($path,0770);
5358: }
5359: }
5360: }
5361: open(FILE,">$file");
5362: print FILE $info;
5363: close(FILE);
5364: return 'ok';
5365: }
5366:
5367: sub tokenwrapper {
5368: my $uri=shift;
5369: $uri=~s|^http\://([^/]+)||;
5370: $uri=~s|^/||;
5371: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
5372: my $token=$1;
5373: my (undef,$udom,$uname,$file)=split('/',$uri,4);
5374: if ($udom && $uname && $file) {
5375: $file=~s|(\?\.*)*$||;
5376: &appenv("userfile.$udom/$uname/$file" => $ENV{'request.course.id'});
5377: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
5378: (($uri=~/\?/)?'&':'?').'token='.$token.
5379: '&tokenissued='.$perlvar{'lonHostID'};
5380: } else {
5381: return '/adm/notfound.html';
5382: }
5383: }
5384:
5385: sub getuploaded {
5386: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
5387: $uri=~s/^\///;
5388: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
5389: my $ua=new LWP::UserAgent;
5390: my $request=new HTTP::Request($reqtype,$uri);
5391: my $response=$ua->request($request);
5392: $$rtncode = $response->code;
5393: if (! $response->is_success()) {
5394: return 'failed';
5395: }
5396: if ($reqtype eq 'HEAD') {
5397: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
5398: } elsif ($reqtype eq 'GET') {
5399: $$info = $response->content;
5400: }
5401: return 'ok';
5402: }
5403:
5404: sub readfile {
5405: my $file = shift;
5406: if ( (! -e $file ) || ($file eq '') ) { return -1; };
5407: my $fh;
5408: open($fh,"<$file");
5409: my $a='';
5410: while (<$fh>) { $a .=$_; }
5411: return $a;
5412: }
5413:
5414: sub filelocation {
5415: my ($dir,$file) = @_;
5416: my $location;
5417: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
5418: if ($file=~m:^/~:) { # is a contruction space reference
5419: $location = $file;
5420: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
5421: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
5422: my ($udom,$uname,$filename)=
5423: ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
5424: my $home=&homeserver($uname,$udom);
5425: my $is_me=0;
5426: my @ids=¤t_machine_ids();
5427: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
5428: if ($is_me) {
5429: $location=&Apache::loncommon::propath($udom,$uname).
5430: '/userfiles/'.$filename;
5431: } else {
5432: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
5433: $udom.'/'.$uname.'/'.$filename;
5434: }
5435: } else {
5436: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5437: $file=~s:^/res/:/:;
5438: if ( !( $file =~ m:^/:) ) {
5439: $location = $dir. '/'.$file;
5440: } else {
5441: $location = '/home/httpd/html/res'.$file;
5442: }
5443: }
5444: $location=~s://+:/:g; # remove duplicate /
5445: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
5446: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
5447: return $location;
5448: }
5449:
5450: sub hreflocation {
5451: my ($dir,$file)=@_;
5452: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
5453: my $finalpath=filelocation($dir,$file);
5454: $finalpath=~s-^/home/httpd/html--;
5455: $finalpath=~s-^/home/(\w+)/public_html/-/~$1/-;
5456: return $finalpath;
5457: } elsif ($file=~m-^/home-) {
5458: $file=~s-^/home/httpd/html--;
5459: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
5460: return $file;
5461: }
5462: return $file;
5463: }
5464:
5465: sub current_machine_domains {
5466: my $hostname=$hostname{$perlvar{'lonHostID'}};
5467: my @domains;
5468: while( my($id, $name) = each(%hostname)) {
5469: # &logthis("-$id-$name-$hostname-");
5470: if ($hostname eq $name) {
5471: push(@domains,$hostdom{$id});
5472: }
5473: }
5474: return @domains;
5475: }
5476:
5477: sub current_machine_ids {
5478: my $hostname=$hostname{$perlvar{'lonHostID'}};
5479: my @ids;
5480: while( my($id, $name) = each(%hostname)) {
5481: # &logthis("-$id-$name-$hostname-");
5482: if ($hostname eq $name) {
5483: push(@ids,$id);
5484: }
5485: }
5486: return @ids;
5487: }
5488:
5489: # ------------------------------------------------------------- Declutters URLs
5490:
5491: sub declutter {
5492: my $thisfn=shift;
5493: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
5494: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5495: $thisfn=~s/^\///;
5496: $thisfn=~s/^res\///;
5497: $thisfn=~s/\?.+$//;
5498: return $thisfn;
5499: }
5500:
5501: # ------------------------------------------------------------- Clutter up URLs
5502:
5503: sub clutter {
5504: my $thisfn='/'.&declutter(shift);
5505: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
5506: $thisfn='/res'.$thisfn;
5507: }
5508: return $thisfn;
5509: }
5510:
5511: sub freeze_escape {
5512: my ($value)=@_;
5513: if (ref($value)) {
5514: $value=&nfreeze($value);
5515: return '__FROZEN__'.&escape($value);
5516: }
5517: return &escape($value);
5518: }
5519:
5520: # -------------------------------------------------------- Escape Special Chars
5521:
5522: sub escape {
5523: my $str=shift;
5524: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
5525: return $str;
5526: }
5527:
5528: # ----------------------------------------------------- Un-Escape Special Chars
5529:
5530: sub unescape {
5531: my $str=shift;
5532: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
5533: return $str;
5534: }
5535:
5536: sub thaw_unescape {
5537: my ($value)=@_;
5538: if ($value =~ /^__FROZEN__/) {
5539: substr($value,0,10,undef);
5540: $value=&unescape($value);
5541: return &thaw($value);
5542: }
5543: return &unescape($value);
5544: }
5545:
5546: sub mod_perl_version {
5547: return 1;
5548: if (defined($perlvar{'MODPERL2'})) {
5549: return 2;
5550: }
5551: }
5552:
5553: sub correct_line_ends {
5554: my ($result)=@_;
5555: $$result =~s/\r\n/\n/mg;
5556: $$result =~s/\r/\n/mg;
5557: }
5558: # ================================================================ Main Program
5559:
5560: sub goodbye {
5561: &logthis("Starting Shut down");
5562: #not converted to using infrastruture and probably shouldn't be
5563: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
5564: #converted
5565: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
5566: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
5567: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
5568: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
5569: #1.1 only
5570: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
5571: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
5572: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
5573: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
5574: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
5575: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
5576: &logthis(sprintf("%-20s is %s",'hits',$hits));
5577: &flushcourselogs();
5578: &logthis("Shutting down");
5579: return DONE;
5580: }
5581:
5582: BEGIN {
5583: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
5584: unless ($readit) {
5585: {
5586: # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
5587: open(my $config,"</etc/httpd/conf/loncapa.conf");
5588:
5589: while (my $configline=<$config>) {
5590: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
5591: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5592: chomp($varvalue);
5593: $perlvar{$varname}=$varvalue;
5594: }
5595: }
5596: close($config);
5597: }
5598: {
5599: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
5600:
5601: while (my $configline=<$config>) {
5602: if ($configline =~ /^[^\#]*PerlSetVar/) {
5603: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5604: chomp($varvalue);
5605: $perlvar{$varname}=$varvalue;
5606: }
5607: }
5608: close($config);
5609: }
5610:
5611: # ------------------------------------------------------------ Read domain file
5612: {
5613: %domaindescription = ();
5614: %domain_auth_def = ();
5615: %domain_auth_arg_def = ();
5616: my $fh;
5617: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
5618: while (<$fh>) {
5619: next if (/^(\#|\s*$)/);
5620: # next if /^\#/;
5621: chomp;
5622: my ($domain, $domain_description, $def_auth, $def_auth_arg,
5623: $def_lang, $city, $longi, $lati) = split(/:/,$_);
5624: $domain_auth_def{$domain}=$def_auth;
5625: $domain_auth_arg_def{$domain}=$def_auth_arg;
5626: $domaindescription{$domain}=$domain_description;
5627: $domain_lang_def{$domain}=$def_lang;
5628: $domain_city{$domain}=$city;
5629: $domain_longi{$domain}=$longi;
5630: $domain_lati{$domain}=$lati;
5631:
5632: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
5633: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
5634: }
5635: }
5636: close ($fh);
5637: }
5638:
5639:
5640: # ------------------------------------------------------------- Read hosts file
5641: {
5642: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
5643:
5644: while (my $configline=<$config>) {
5645: next if ($configline =~ /^(\#|\s*$)/);
5646: chomp($configline);
5647: my ($id,$domain,$role,$name)=split(/:/,$configline);
5648: $name=~s/\s//g;
5649: if ($id && $domain && $role && $name) {
5650: $hostname{$id}=$name;
5651: $hostdom{$id}=$domain;
5652: if ($role eq 'library') { $libserv{$id}=$name; }
5653: }
5654: }
5655: close($config);
5656: }
5657:
5658: sub get_iphost {
5659: if (%iphost) { return %iphost; }
5660: foreach my $id (keys(%hostname)) {
5661: my $name=$hostname{$id};
5662: my $ip = gethostbyname($name);
5663: if (!$ip || length($ip) ne 4) {
5664: &logthis("Skipping host $id name $name no IP found\n");
5665: next;
5666: }
5667: $ip=inet_ntoa($ip);
5668: push(@{$iphost{$ip}},$id);
5669: }
5670: return %iphost;
5671: }
5672:
5673: # ------------------------------------------------------ Read spare server file
5674: {
5675: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
5676:
5677: while (my $configline=<$config>) {
5678: chomp($configline);
5679: if ($configline) {
5680: $spareid{$configline}=1;
5681: }
5682: }
5683: close($config);
5684: }
5685: # ------------------------------------------------------------ Read permissions
5686: {
5687: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
5688:
5689: while (my $configline=<$config>) {
5690: chomp($configline);
5691: if ($configline) {
5692: my ($role,$perm)=split(/ /,$configline);
5693: if ($perm ne '') { $pr{$role}=$perm; }
5694: }
5695: }
5696: close($config);
5697: }
5698:
5699: # -------------------------------------------- Read plain texts for permissions
5700: {
5701: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
5702:
5703: while (my $configline=<$config>) {
5704: chomp($configline);
5705: if ($configline) {
5706: my ($short,$plain)=split(/:/,$configline);
5707: if ($plain ne '') { $prp{$short}=$plain; }
5708: }
5709: }
5710: close($config);
5711: }
5712:
5713: # ---------------------------------------------------------- Read package table
5714: {
5715: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
5716:
5717: while (my $configline=<$config>) {
5718: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
5719: chomp($configline);
5720: my ($short,$plain)=split(/:/,$configline);
5721: my ($pack,$name)=split(/\&/,$short);
5722: if ($plain ne '') {
5723: $packagetab{$pack.'&'.$name.'&name'}=$name;
5724: $packagetab{$short}=$plain;
5725: }
5726: }
5727: close($config);
5728: }
5729:
5730: # ------------- set up temporary directory
5731: {
5732: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
5733:
5734: }
5735:
5736: $memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
5737:
5738: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
5739: $dumpcount=0;
5740:
5741: &logtouch();
5742: &logthis('<font color=yellow>INFO: Read configuration</font>');
5743: $readit=1;
5744: {
5745: use integer;
5746: my $test=(2**32)+1;
5747: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
5748: &logthis(" Detected 64bit platform ($_64bit)");
5749: }
5750: }
5751: }
5752:
5753: 1;
5754: __END__
5755:
5756: =pod
5757:
5758: =head1 NAME
5759:
5760: Apache::lonnet - Subroutines to ask questions about things in the network.
5761:
5762: =head1 SYNOPSIS
5763:
5764: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
5765:
5766: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
5767:
5768: Common parameters:
5769:
5770: =over 4
5771:
5772: =item *
5773:
5774: $uname : an internal username (if $cname expecting a course Id specifically)
5775:
5776: =item *
5777:
5778: $udom : a domain (if $cdom expecting a course's domain specifically)
5779:
5780: =item *
5781:
5782: $symb : a resource instance identifier
5783:
5784: =item *
5785:
5786: $namespace : the name of a .db file that contains the data needed or
5787: being set.
5788:
5789: =back
5790:
5791: =head1 OVERVIEW
5792:
5793: lonnet provides subroutines which interact with the
5794: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
5795: about classes, users, and resources.
5796:
5797: For many of these objects you can also use this to store data about
5798: them or modify them in various ways.
5799:
5800: =head2 Symbs
5801:
5802: To identify a specific instance of a resource, LON-CAPA uses symbols
5803: or "symbs"X<symb>. These identifiers are built from the URL of the
5804: map, the resource number of the resource in the map, and the URL of
5805: the resource itself. The latter is somewhat redundant, but might help
5806: if maps change.
5807:
5808: An example is
5809:
5810: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
5811:
5812: The respective map entry is
5813:
5814: <resource id="19" src="/res/msu/korte/tests/part12.problem"
5815: title="Problem 2">
5816: </resource>
5817:
5818: Symbs are used by the random number generator, as well as to store and
5819: restore data specific to a certain instance of for example a problem.
5820:
5821: =head2 Storing And Retrieving Data
5822:
5823: X<store()>X<cstore()>X<restore()>Three of the most important functions
5824: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
5825: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
5826: is is the non-critical message twin of cstore. These functions are for
5827: handlers to store a perl hash to a user's permanent data space in an
5828: easy manner, and to retrieve it again on another call. It is expected
5829: that a handler would use this once at the beginning to retrieve data,
5830: and then again once at the end to send only the new data back.
5831:
5832: The data is stored in the user's data directory on the user's
5833: homeserver under the ID of the course.
5834:
5835: The hash that is returned by restore will have all of the previous
5836: value for all of the elements of the hash.
5837:
5838: Example:
5839:
5840: #creating a hash
5841: my %hash;
5842: $hash{'foo'}='bar';
5843:
5844: #storing it
5845: &Apache::lonnet::cstore(\%hash);
5846:
5847: #changing a value
5848: $hash{'foo'}='notbar';
5849:
5850: #adding a new value
5851: $hash{'bar'}='foo';
5852: &Apache::lonnet::cstore(\%hash);
5853:
5854: #retrieving the hash
5855: my %history=&Apache::lonnet::restore();
5856:
5857: #print the hash
5858: foreach my $key (sort(keys(%history))) {
5859: print("\%history{$key} = $history{$key}");
5860: }
5861:
5862: Will print out:
5863:
5864: %history{1:foo} = bar
5865: %history{1:keys} = foo:timestamp
5866: %history{1:timestamp} = 990455579
5867: %history{2:bar} = foo
5868: %history{2:foo} = notbar
5869: %history{2:keys} = foo:bar:timestamp
5870: %history{2:timestamp} = 990455580
5871: %history{bar} = foo
5872: %history{foo} = notbar
5873: %history{timestamp} = 990455580
5874: %history{version} = 2
5875:
5876: Note that the special hash entries C<keys>, C<version> and
5877: C<timestamp> were added to the hash. C<version> will be equal to the
5878: total number of versions of the data that have been stored. The
5879: C<timestamp> attribute will be the UNIX time the hash was
5880: stored. C<keys> is available in every historical section to list which
5881: keys were added or changed at a specific historical revision of a
5882: hash.
5883:
5884: B<Warning>: do not store the hash that restore returns directly. This
5885: will cause a mess since it will restore the historical keys as if the
5886: were new keys. I.E. 1:foo will become 1:1:foo etc.
5887:
5888: Calling convention:
5889:
5890: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
5891: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
5892:
5893: For more detailed information, see lonnet specific documentation.
5894:
5895: =head1 RETURN MESSAGES
5896:
5897: =over 4
5898:
5899: =item * B<con_lost>: unable to contact remote host
5900:
5901: =item * B<con_delayed>: unable to contact remote host, message will be delivered
5902: when the connection is brought back up
5903:
5904: =item * B<con_failed>: unable to contact remote host and unable to save message
5905: for later delivery
5906:
5907: =item * B<error:>: an error a occured, a description of the error follows the :
5908:
5909: =item * B<no_such_host>: unable to fund a host associated with the user/domain
5910: that was requested
5911:
5912: =back
5913:
5914: =head1 PUBLIC SUBROUTINES
5915:
5916: =head2 Session Environment Functions
5917:
5918: =over 4
5919:
5920: =item *
5921: X<appenv()>
5922: B<appenv(%hash)>: the value of %hash is written to
5923: the user envirnoment file, and will be restored for each access this
5924: user makes during this session, also modifies the %ENV for the current
5925: process
5926:
5927: =item *
5928: X<delenv()>
5929: B<delenv($regexp)>: removes all items from the session
5930: environment file that matches the regular expression in $regexp. The
5931: values are also delted from the current processes %ENV.
5932:
5933: =back
5934:
5935: =head2 User Information
5936:
5937: =over 4
5938:
5939: =item *
5940: X<queryauthenticate()>
5941: B<queryauthenticate($uname,$udom)>: try to determine user's current
5942: authentication scheme
5943:
5944: =item *
5945: X<authenticate()>
5946: B<authenticate($uname,$upass,$udom)>: try to
5947: authenticate user from domain's lib servers (first use the current
5948: one). C<$upass> should be the users password.
5949:
5950: =item *
5951: X<homeserver()>
5952: B<homeserver($uname,$udom)>: find the server which has
5953: the user's directory and files (there must be only one), this caches
5954: the answer, and also caches if there is a borken connection.
5955:
5956: =item *
5957: X<idget()>
5958: B<idget($udom,@ids)>: find the usernames behind a list of IDs
5959: (IDs are a unique resource in a domain, there must be only 1 ID per
5960: username, and only 1 username per ID in a specific domain) (returns
5961: hash: id=>name,id=>name)
5962:
5963: =item *
5964: X<idrget()>
5965: B<idrget($udom,@unames)>: find the IDs behind a list of
5966: usernames (returns hash: name=>id,name=>id)
5967:
5968: =item *
5969: X<idput()>
5970: B<idput($udom,%ids)>: store away a list of names and associated IDs
5971:
5972: =item *
5973: X<rolesinit()>
5974: B<rolesinit($udom,$username,$authhost)>: get user privileges
5975:
5976: =item *
5977: X<getsection()>
5978: B<getsection($udom,$uname,$cname)>: finds the section of student in the
5979: course $cname, return section name/number or '' for "not in course"
5980: and '-1' for "no section"
5981:
5982: =item *
5983: X<userenvironment()>
5984: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
5985: passed in @what from the requested user's environment, returns a hash
5986:
5987: =back
5988:
5989: =head2 User Roles
5990:
5991: =over 4
5992:
5993: =item *
5994:
5995: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
5996: actions
5997: F: full access
5998: U,I,K: authentication modes (cxx only)
5999: '': forbidden
6000: 1: user needs to choose course
6001: 2: browse allowed
6002:
6003: =item *
6004:
6005: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
6006: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
6007: and course level
6008:
6009: =item *
6010:
6011: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
6012: explanation of a user role term
6013:
6014: =back
6015:
6016: =head2 User Modification
6017:
6018: =over 4
6019:
6020: =item *
6021:
6022: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
6023: user for the level given by URL. Optional start and end dates (leave empty
6024: string or zero for "no date")
6025:
6026: =item *
6027:
6028: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
6029: change a users, password, possible return values are: ok,
6030: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
6031: refused
6032:
6033: =item *
6034:
6035: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
6036:
6037: =item *
6038:
6039: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
6040: modify user
6041:
6042: =item *
6043:
6044: modifystudent
6045:
6046: modify a students enrollment and identification information.
6047: The course id is resolved based on the current users environment.
6048: This means the envoking user must be a course coordinator or otherwise
6049: associated with a course.
6050:
6051: This call is essentially a wrapper for lonnet::modifyuser and
6052: lonnet::modify_student_enrollment
6053:
6054: Inputs:
6055:
6056: =over 4
6057:
6058: =item B<$udom> Students loncapa domain
6059:
6060: =item B<$uname> Students loncapa login name
6061:
6062: =item B<$uid> Students id/student number
6063:
6064: =item B<$umode> Students authentication mode
6065:
6066: =item B<$upass> Students password
6067:
6068: =item B<$first> Students first name
6069:
6070: =item B<$middle> Students middle name
6071:
6072: =item B<$last> Students last name
6073:
6074: =item B<$gene> Students generation
6075:
6076: =item B<$usec> Students section in course
6077:
6078: =item B<$end> Unix time of the roles expiration
6079:
6080: =item B<$start> Unix time of the roles start date
6081:
6082: =item B<$forceid> If defined, allow $uid to be changed
6083:
6084: =item B<$desiredhome> server to use as home server for student
6085:
6086: =back
6087:
6088: =item *
6089:
6090: modify_student_enrollment
6091:
6092: Change a students enrollment status in a class. The environment variable
6093: 'role.request.course' must be defined for this function to proceed.
6094:
6095: Inputs:
6096:
6097: =over 4
6098:
6099: =item $udom, students domain
6100:
6101: =item $uname, students name
6102:
6103: =item $uid, students user id
6104:
6105: =item $first, students first name
6106:
6107: =item $middle
6108:
6109: =item $last
6110:
6111: =item $gene
6112:
6113: =item $usec
6114:
6115: =item $end
6116:
6117: =item $start
6118:
6119: =back
6120:
6121:
6122: =item *
6123:
6124: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
6125: custom role; give a custom role to a user for the level given by URL. Specify
6126: name and domain of role author, and role name
6127:
6128: =item *
6129:
6130: revokerole($udom,$uname,$url,$role) : revoke a role for url
6131:
6132: =item *
6133:
6134: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
6135:
6136: =back
6137:
6138: =head2 Course Infomation
6139:
6140: =over 4
6141:
6142: =item *
6143:
6144: coursedescription($courseid) : course description
6145:
6146: =item *
6147:
6148: courseresdata($coursenum,$coursedomain,@which) : request for current
6149: parameter setting for a specific course, @what should be a list of
6150: parameters to ask about. This routine caches answers for 5 minutes.
6151:
6152: =back
6153:
6154: =head2 Course Modification
6155:
6156: =over 4
6157:
6158: =item *
6159:
6160: writecoursepref($courseid,%prefs) : write preferences (environment
6161: database) for a course
6162:
6163: =item *
6164:
6165: createcourse($udom,$description,$url) : make/modify course
6166:
6167: =back
6168:
6169: =head2 Resource Subroutines
6170:
6171: =over 4
6172:
6173: =item *
6174:
6175: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
6176:
6177: =item *
6178:
6179: repcopy($filename) : subscribes to the requested file, and attempts to
6180: replicate from the owning library server, Might return
6181: 'unavailable', 'not_found', 'forbidden', 'ok', or
6182: 'bad_request', also attempts to grab the metadata for the
6183: resource. Expects the local filesystem pathname
6184: (/home/httpd/html/res/....)
6185:
6186: =back
6187:
6188: =head2 Resource Information
6189:
6190: =over 4
6191:
6192: =item *
6193:
6194: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
6195: a vairety of different possible values, $varname should be a request
6196: string, and the other parameters can be used to specify who and what
6197: one is asking about.
6198:
6199: Possible values for $varname are environment.lastname (or other item
6200: from the envirnment hash), user.name (or someother aspect about the
6201: user), resource.0.maxtries (or some other part and parameter of a
6202: resource)
6203:
6204: =item *
6205:
6206: directcondval($number) : get current value of a condition; reads from a state
6207: string
6208:
6209: =item *
6210:
6211: condval($condidx) : value of condition index based on state
6212:
6213: =item *
6214:
6215: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
6216: resource's metadata, $what should be either a specific key, or either
6217: 'keys' (to get a list of possible keys) or 'packages' to get a list of
6218: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
6219:
6220: this function automatically caches all requests
6221:
6222: =item *
6223:
6224: metadata_query($query,$custom,$customshow) : make a metadata query against the
6225: network of library servers; returns file handle of where SQL and regex results
6226: will be stored for query
6227:
6228: =item *
6229:
6230: symbread($filename) : return symbolic list entry (filename argument optional);
6231: returns the data handle
6232:
6233: =item *
6234:
6235: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
6236: a possible symb for the URL in $thisfn, and if is an encryypted
6237: resource that the user accessed using /enc/ returns a 1 on success, 0
6238: on failure, user must be in a course, as it assumes the existance of
6239: the course initial hash, and uses $ENV('request.course.id'}
6240:
6241:
6242: =item *
6243:
6244: symbclean($symb) : removes versions numbers from a symb, returns the
6245: cleaned symb
6246:
6247: =item *
6248:
6249: is_on_map($uri) : checks if the $uri is somewhere on the current
6250: course map, user must be in a course for it to work.
6251:
6252: =item *
6253:
6254: numval($salt) : return random seed value (addend for rndseed)
6255:
6256: =item *
6257:
6258: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
6259: a random seed, all arguments are optional, if they aren't sent it uses the
6260: environment to derive them. Note: if symb isn't sent and it can't get one
6261: from &symbread it will use the current time as its return value
6262:
6263: =item *
6264:
6265: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
6266: unfakeable, receipt
6267:
6268: =item *
6269:
6270: receipt() : API to ireceipt working off of ENV values; given out to users
6271:
6272: =item *
6273:
6274: countacc($url) : count the number of accesses to a given URL
6275:
6276: =item *
6277:
6278: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
6279:
6280: =item *
6281:
6282: checkin($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 $tcrsid)
6283:
6284: =item *
6285:
6286: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
6287:
6288: =item *
6289:
6290: devalidate($symb) : devalidate temporary spreadsheet calculations,
6291: forcing spreadsheet to reevaluate the resource scores next time.
6292:
6293: =back
6294:
6295: =head2 Storing/Retreiving Data
6296:
6297: =over 4
6298:
6299: =item *
6300:
6301: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
6302: for this url; hashref needs to be given and should be a \%hashname; the
6303: remaining args aren't required and if they aren't passed or are '' they will
6304: be derived from the ENV
6305:
6306: =item *
6307:
6308: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
6309: uses critical subroutine
6310:
6311: =item *
6312:
6313: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
6314: all args are optional
6315:
6316: =item *
6317:
6318: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
6319: works very similar to store/cstore, but all data is stored in a
6320: temporary location and can be reset using tmpreset, $storehash should
6321: be a hash reference, returns nothing on success
6322:
6323: =item *
6324:
6325: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
6326: similar to restore, but all data is stored in a temporary location and
6327: can be reset using tmpreset. Returns a hash of values on success,
6328: error string otherwise.
6329:
6330: =item *
6331:
6332: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
6333: deltes all keys for $symb form the temporary storage hash.
6334:
6335: =item *
6336:
6337: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6338: reference filled in from namesp ($udom and $uname are optional)
6339:
6340: =item *
6341:
6342: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
6343: namesp ($udom and $uname are optional)
6344:
6345: =item *
6346:
6347: dump($namespace,$udom,$uname,$regexp) :
6348: dumps the complete (or key matching regexp) namespace into a hash
6349: ($udom, $uname and $regexp are optional)
6350:
6351: =item *
6352:
6353: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
6354: $store can be a scalar, an array reference, or if the amount to be
6355: incremented is > 1, a hash reference.
6356:
6357: ($udom and $uname are optional)
6358:
6359: =item *
6360:
6361: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
6362: ($udom and $uname are optional)
6363:
6364: =item *
6365:
6366: putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
6367: keys used in storehash include version information (e.g., 1:$symb:message etc.) as
6368: used in records written by &store and retrieved by &restore. This function
6369: was created for use in editing discussion posts, without incrementing the
6370: version number included in the key for a particular post. The colon
6371: separated list of attribute names (e.g., the value associated with the key
6372: 1:keys:$symb) is also generated and passed in the ampersand separated
6373: items sent to lonnet::reply().
6374:
6375: =item *
6376:
6377: cput($namespace,$storehash,$udom,$uname) : critical put
6378: ($udom and $uname are optional)
6379:
6380: =item *
6381:
6382: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6383: reference filled in from namesp (encrypts the return communication)
6384: ($udom and $uname are optional)
6385:
6386: =item *
6387:
6388: log($udom,$name,$home,$message) : write to permanent log for user; use
6389: critical subroutine
6390:
6391: =back
6392:
6393: =head2 Network Status Functions
6394:
6395: =over 4
6396:
6397: =item *
6398:
6399: dirlist($uri) : return directory list based on URI
6400:
6401: =item *
6402:
6403: spareserver() : find server with least workload from spare.tab
6404:
6405: =back
6406:
6407: =head2 Apache Request
6408:
6409: =over 4
6410:
6411: =item *
6412:
6413: ssi($url,%hash) : server side include, does a complete request cycle on url to
6414: localhost, posts hash
6415:
6416: =back
6417:
6418: =head2 Data to String to Data
6419:
6420: =over 4
6421:
6422: =item *
6423:
6424: hash2str(%hash) : convert a hash into a string complete with escaping and '='
6425: and '&' separators, supports elements that are arrayrefs and hashrefs
6426:
6427: =item *
6428:
6429: hashref2str($hashref) : convert a hashref into a string complete with
6430: escaping and '=' and '&' separators, supports elements that are
6431: arrayrefs and hashrefs
6432:
6433: =item *
6434:
6435: arrayref2str($arrayref) : convert an arrayref into a string complete
6436: with escaping and '&' separators, supports elements that are arrayrefs
6437: and hashrefs
6438:
6439: =item *
6440:
6441: str2hash($string) : convert string to hash using unescaping and
6442: splitting on '=' and '&', supports elements that are arrayrefs and
6443: hashrefs
6444:
6445: =item *
6446:
6447: str2array($string) : convert string to hash using unescaping and
6448: splitting on '&', supports elements that are arrayrefs and hashrefs
6449:
6450: =back
6451:
6452: =head2 Logging Routines
6453:
6454: =over 4
6455:
6456: These routines allow one to make log messages in the lonnet.log and
6457: lonnet.perm logfiles.
6458:
6459: =item *
6460:
6461: logtouch() : make sure the logfile, lonnet.log, exists
6462:
6463: =item *
6464:
6465: logthis() : append message to the normal lonnet.log file, it gets
6466: preiodically rolled over and deleted.
6467:
6468: =item *
6469:
6470: logperm() : append a permanent message to lonnet.perm.log, this log
6471: file never gets deleted by any automated portion of the system, only
6472: messages of critical importance should go in here.
6473:
6474: =back
6475:
6476: =head2 General File Helper Routines
6477:
6478: =over 4
6479:
6480: =item *
6481:
6482: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
6483: (a) files in /uploaded
6484: (i) If a local copy of the file exists -
6485: compares modification date of local copy with last-modified date for
6486: definitive version stored on home server for course. If local copy is
6487: stale, requests a new version from the home server and stores it.
6488: If the original has been removed from the home server, then local copy
6489: is unlinked.
6490: (ii) If local copy does not exist -
6491: requests the file from the home server and stores it.
6492:
6493: If $caller is 'uploadrep':
6494: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
6495: for request for files originally uploaded via DOCS.
6496: - returns 'ok' if fresh local copy now available, -1 otherwise.
6497:
6498: Otherwise:
6499: This indicates a call from the content generation phase of the request.
6500: - returns the entire contents of the file or -1.
6501:
6502: (b) files in /res
6503: - returns the entire contents of a file or -1;
6504: it properly subscribes to and replicates the file if neccessary.
6505:
6506: =item *
6507:
6508: filelocation($dir,$file) : returns file system location of a file
6509: based on URI; meant to be "fairly clean" absolute reference, $dir is a
6510: directory that relative $file lookups are to looked in ($dir of /a/dir
6511: and a file of ../bob will become /a/bob)
6512:
6513: =item *
6514:
6515: hreflocation($dir,$file) : returns file system location or a URL; same as
6516: filelocation except for hrefs
6517:
6518: =item *
6519:
6520: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
6521:
6522: =back
6523:
6524: =head2 Usererfile file routines (/uploaded*)
6525:
6526: =over 4
6527:
6528: =item *
6529:
6530: userfileupload(): main rotine for putting a file in a user or course's
6531: filespace, arguments are,
6532:
6533: formname - required - this is the name of the element in $ENV where the
6534: filename, and the contents of the file to create/modifed exist
6535: the filename is in $ENV{'form.'.$formname.'.filename'} and the
6536: contents of the file is located in $ENV{'form.'.$formname}
6537: coursedoc - if true, store the file in the course of the active role
6538: of the current user
6539: subdir - required - subdirectory to put the file in under ../userfiles/
6540: if undefined, it will be placed in "unknown"
6541:
6542: (This routine calls clean_filename() to remove any dangerous
6543: characters from the filename, and then calls finuserfileupload() to
6544: complete the transaction)
6545:
6546: returns either the url of the uploaded file (/uploaded/....) if successful
6547: and /adm/notfound.html if unsuccessful
6548:
6549: =item *
6550:
6551: clean_filename(): routine for cleaing a filename up for storage in
6552: userfile space, argument is:
6553:
6554: filename - proposed filename
6555:
6556: returns: the new clean filename
6557:
6558: =item *
6559:
6560: finishuserfileupload(): routine that creaes and sends the file to
6561: userspace, probably shouldn't be called directly
6562:
6563: docuname: username or courseid of destination for the file
6564: docudom: domain of user/course of destination for the file
6565: docuhome: loncapa id of the library server that is getting the file
6566: formname: same as for userfileupload()
6567: fname: filename (inculding subdirectories) for the file
6568:
6569: returns either the url of the uploaded file (/uploaded/....) if successful
6570: and /adm/notfound.html if unsuccessful
6571:
6572: =item *
6573:
6574: renameuserfile(): renames an existing userfile to a new name
6575:
6576: Args:
6577: docuname: username or courseid of destination for the file
6578: docudom: domain of user/course of destination for the file
6579: old: current file name (including any subdirs under userfiles)
6580: new: desired file name (including any subdirs under userfiles)
6581:
6582: =item *
6583:
6584: mkdiruserfile(): creates a directory is a userfiles dir
6585:
6586: Args:
6587: docuname: username or courseid of destination for the file
6588: docudom: domain of user/course of destination for the file
6589: dir: dir to create (including any subdirs under userfiles)
6590:
6591: =item *
6592:
6593: removeuserfile(): removes a file that exists in userfiles
6594:
6595: Args:
6596: docuname: username or courseid of destination for the file
6597: docudom: domain of user/course of destination for the file
6598: fname: filname to delete (including any subdirs under userfiles)
6599:
6600: =item *
6601:
6602: removeuploadedurl(): convience function for removeuserfile()
6603:
6604: Args:
6605: url: a full /uploaded/... url to delete
6606:
6607: =back
6608:
6609: =head2 HTTP Helper Routines
6610:
6611: =over 4
6612:
6613: =item *
6614:
6615: escape() : unpack non-word characters into CGI-compatible hex codes
6616:
6617: =item *
6618:
6619: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
6620:
6621: =back
6622:
6623: =head1 PRIVATE SUBROUTINES
6624:
6625: =head2 Underlying communication routines (Shouldn't call)
6626:
6627: =over 4
6628:
6629: =item *
6630:
6631: subreply() : tries to pass a message to lonc, returns con_lost if incapable
6632:
6633: =item *
6634:
6635: reply() : uses subreply to send a message to remote machine, logs all failures
6636:
6637: =item *
6638:
6639: critical() : passes a critical message to another server; if cannot
6640: get through then place message in connection buffer directory and
6641: returns con_delayed, if incapable of saving message, returns
6642: con_failed
6643:
6644: =item *
6645:
6646: reconlonc() : tries to reconnect lonc client processes.
6647:
6648: =back
6649:
6650: =head2 Resource Access Logging
6651:
6652: =over 4
6653:
6654: =item *
6655:
6656: flushcourselogs() : flush (save) buffer logs and access logs
6657:
6658: =item *
6659:
6660: courselog($what) : save message for course in hash
6661:
6662: =item *
6663:
6664: courseacclog($what) : save message for course using &courselog(). Perform
6665: special processing for specific resource types (problems, exams, quizzes, etc).
6666:
6667: =item *
6668:
6669: goodbye() : flush course logs and log shutting down; it is called in srm.conf
6670: as a PerlChildExitHandler
6671:
6672: =back
6673:
6674: =head2 Other
6675:
6676: =over 4
6677:
6678: =item *
6679:
6680: symblist($mapname,%newhash) : update symbolic storage links
6681:
6682: =back
6683:
6684: =cut
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