1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.184 2001/12/06 19:23:42 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 02/27/01 Scott Harrison
51: # 3/2 Gerd Kortemeyer
52: # 3/15,3/19 Scott Harrison
53: # 3/19,3/20 Gerd Kortemeyer
54: # 3/22,3/27,4/2,4/16,4/17 Scott Harrison
55: # 5/26,5/28 Gerd Kortemeyer
56: # 5/30 H. K. Ng
57: # 6/1 Gerd Kortemeyer
58: # July Guy Albertelli
59: # 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20,9/21,9/26,
60: # 10/2 Gerd Kortemeyer
61: # 10/5,10/10,11/13,11/15 Scott Harrison
62: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
63: # 12/5 Matthew Hall
64: # 12/5 Guy Albertelli
65: # 12/6 Gerd Kortemeyer
66: #
67: # $Id: lonnet.pm,v 1.184 2001/12/06 19:23:42 www Exp $
68: #
69: ###
70:
71: # Functions for use by content handlers:
72: #
73: # metadata_query(sql-query-string,custom-metadata-regex) :
74: # returns file handle of where sql and
75: # regex results will be stored for query
76: # plaintext(short) : plain text explanation of short term
77: # fileembstyle(ext) : embed style in page for file extension
78: # filedescription(ext) : descriptor text for file extension
79: # allowed(short,url) : returns codes for allowed actions
80: # F: full access
81: # U,I,K: authentication modes (cxx only)
82: # '': forbidden
83: # 1: user needs to choose course
84: # 2: browse allowed
85: # definerole(rolename,sys,dom,cou) : define a custom role rolename
86: # set privileges in format of lonTabs/roles.tab for
87: # system, domain and course level,
88: # assignrole(udom,uname,url,role,end,start) : give a role to a user for the
89: # level given by url. Optional start and end dates
90: # (leave empty string or zero for "no date")
91: # assigncustomrole (udom,uname,url,rdom,rnam,rolename,end,start) : give a
92: # custom role to a user for the level given by url.
93: # Specify name and domain of role author, and role name
94: # revokerole (udom,uname,url,role) : Revoke a role for url
95: # revokecustomrole (udom,uname,url,rdom,rnam,rolename) : Revoke a custom role
96: # appenv(hash) : adds hash to session environment
97: # delenv(varname) : deletes all environment entries starting with varname
98: # store(hashref,symb,courseid,udom,uname)
99: # : stores hash permanently for this url
100: # hashref needs to be given, and should be a \%hashname
101: # the remaining args aren't required and if they aren't
102: # passed or are '' they will be derived from the ENV
103: # cstore(hashref,symb,courseid,udom,uname)
104: # : same as store but uses the critical interface to
105: # guarentee a store
106: # restore(symb,courseid,udom,uname)
107: # : returns hash for this symb, all args are optional
108: # if they aren't given they will be derived from the
109: # current enviroment
110: #
111: #
112: # for the next 6 functions udom and uname are optional
113: # if supplied they use udom as the domain and uname
114: # as the username for the function (supply a courseid
115: # for the uname if you want a course database)
116: # if not supplied it uses %ENV and looks at
117: # user. attribute for the values
118: #
119: # eget(namesp,arrayref,udom,uname)
120: # : returns hash with keys from array reference filled
121: # in from namesp (encrypts the return communication)
122: # get(namesp,arrayref,udom,uname)
123: # : returns hash with keys from array reference filled
124: # in from namesp
125: # dump(namesp,udom,uname) : dumps the complete namespace into a hash
126: # del(namesp,array,udom,uname) : deletes keys out of array from namesp
127: # put(namesp,hash,udom,uname) : stores hash in namesp
128: # cput(namesp,hash,udom,uname) : critical put
129: #
130: #
131: # ssi(url,hash) : does a complete request cycle on url to localhost, posts
132: # hash
133: # coursedescription(id) : returns and caches course description for id
134: # repcopy(filename) : replicate file
135: # dirlist(url) : gets a directory listing
136: # directcondval(index) : reading condition value of single condition from
137: # state string
138: # condval(index) : value of condition index based on state
139: # EXT(name) : value of a variable
140: # symblist(map,hash) : Updates symbolic storage links
141: # symbread([filename]) : returns the data handle (filename optional)
142: # rndseed([symb,courseid,domain,uname])
143: # : returns a random seed, all arguments are optional,
144: # if they aren't sent it use the environment to derive
145: # them
146: # Note: if symb isn't sent and it can't get one from
147: # &symbread it will use the current time as it's return
148: # receipt() : returns a receipt to be given out to users
149: # getfile(filename) : returns the contents of filename, or a -1 if it can't
150: # be found, replicates and subscribes to the file
151: # filelocation(dir,file) : returns a fairly clean absolute reference to file
152: # from the directory dir
153: # hreflocation(dir,file) : same as filelocation, but for hrefs
154: # log(domain,user,home,msg) : write to permanent log for user
155: # usection(domain,user,courseid) : output of section name/number or '' for
156: # "not in course" and '-1' for "no section"
157: # userenvironment(domain,user,what) : puts out any environment parameter
158: # for a user
159: # idput(domain,hash) : writes IDs for users from hash (name=>id,name=>id)
160: # idget(domain,array): returns hash with usernames (id=>name,id=>name) for
161: # an array of IDs
162: # idrget(domain,array): returns hash with IDs for usernames (name=>id,...) for
163: # an array of names
164: # metadata(file,entry): returns the metadata entry for a file. entry='keys'
165: # returns a comma separated list of keys
166: #
167:
168: package Apache::lonnet;
169:
170: use strict;
171: use Apache::File;
172: use LWP::UserAgent();
173: use HTTP::Headers;
174: use vars
175: qw(%perlvar %hostname %homecache %hostip %spareid %hostdom %libserv %pr %prp %fe %fd %metacache %packagetab %courselogs %accesshash);
176: use IO::Socket;
177: use GDBM_File;
178: use Apache::Constants qw(:common :http);
179: use HTML::TokeParser;
180: use Fcntl qw(:flock);
181:
182: # --------------------------------------------------------------------- Logging
183:
184: sub logtouch {
185: my $execdir=$perlvar{'lonDaemons'};
186: unless (-e "$execdir/logs/lonnet.log") {
187: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
188: close $fh;
189: }
190: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
191: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
192: }
193:
194: sub logthis {
195: my $message=shift;
196: my $execdir=$perlvar{'lonDaemons'};
197: my $now=time;
198: my $local=localtime($now);
199: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
200: print $fh "$local ($$): $message\n";
201: return 1;
202: }
203:
204: sub logperm {
205: my $message=shift;
206: my $execdir=$perlvar{'lonDaemons'};
207: my $now=time;
208: my $local=localtime($now);
209: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
210: print $fh "$now:$message:$local\n";
211: return 1;
212: }
213:
214: # -------------------------------------------------- Non-critical communication
215: sub subreply {
216: my ($cmd,$server)=@_;
217: my $peerfile="$perlvar{'lonSockDir'}/$server";
218: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
219: Type => SOCK_STREAM,
220: Timeout => 10)
221: or return "con_lost";
222: print $client "$cmd\n";
223: my $answer=<$client>;
224: if (!$answer) { $answer="con_lost"; }
225: chomp($answer);
226: return $answer;
227: }
228:
229: sub reply {
230: my ($cmd,$server)=@_;
231: my $answer=subreply($cmd,$server);
232: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
233: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
234: &logthis("<font color=blue>WARNING:".
235: " $cmd to $server returned $answer</font>");
236: }
237: return $answer;
238: }
239:
240: # ----------------------------------------------------------- Send USR1 to lonc
241:
242: sub reconlonc {
243: my $peerfile=shift;
244: &logthis("Trying to reconnect for $peerfile");
245: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
246: if (my $fh=Apache::File->new("$loncfile")) {
247: my $loncpid=<$fh>;
248: chomp($loncpid);
249: if (kill 0 => $loncpid) {
250: &logthis("lonc at pid $loncpid responding, sending USR1");
251: kill USR1 => $loncpid;
252: sleep 1;
253: if (-e "$peerfile") { return; }
254: &logthis("$peerfile still not there, give it another try");
255: sleep 5;
256: if (-e "$peerfile") { return; }
257: &logthis(
258: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
259: } else {
260: &logthis(
261: "<font color=blue>WARNING:".
262: " lonc at pid $loncpid not responding, giving up</font>");
263: }
264: } else {
265: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
266: }
267: }
268:
269: # ------------------------------------------------------ Critical communication
270:
271: sub critical {
272: my ($cmd,$server)=@_;
273: unless ($hostname{$server}) {
274: &logthis("<font color=blue>WARNING:".
275: " Critical message to unknown server ($server)</font>");
276: return 'no_such_host';
277: }
278: my $answer=reply($cmd,$server);
279: if ($answer eq 'con_lost') {
280: my $pingreply=reply('ping',$server);
281: &reconlonc("$perlvar{'lonSockDir'}/$server");
282: my $pongreply=reply('pong',$server);
283: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
284: $answer=reply($cmd,$server);
285: if ($answer eq 'con_lost') {
286: my $now=time;
287: my $middlename=$cmd;
288: $middlename=substr($middlename,0,16);
289: $middlename=~s/\W//g;
290: my $dfilename=
291: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
292: {
293: my $dfh;
294: if ($dfh=Apache::File->new(">$dfilename")) {
295: print $dfh "$cmd\n";
296: }
297: }
298: sleep 2;
299: my $wcmd='';
300: {
301: my $dfh;
302: if ($dfh=Apache::File->new("$dfilename")) {
303: $wcmd=<$dfh>;
304: }
305: }
306: chomp($wcmd);
307: if ($wcmd eq $cmd) {
308: &logthis("<font color=blue>WARNING: ".
309: "Connection buffer $dfilename: $cmd</font>");
310: &logperm("D:$server:$cmd");
311: return 'con_delayed';
312: } else {
313: &logthis("<font color=red>CRITICAL:"
314: ." Critical connection failed: $server $cmd</font>");
315: &logperm("F:$server:$cmd");
316: return 'con_failed';
317: }
318: }
319: }
320: return $answer;
321: }
322:
323: # ---------------------------------------------------------- Append Environment
324:
325: sub appenv {
326: my %newenv=@_;
327: map {
328: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
329: &logthis("<font color=blue>WARNING: ".
330: "Attempt to modify environment ".$_." to ".$newenv{$_}
331: .'</font>');
332: delete($newenv{$_});
333: } else {
334: $ENV{$_}=$newenv{$_};
335: }
336: } keys %newenv;
337:
338: my $lockfh;
339: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
340: return 'error: '.$!;
341: }
342: unless (flock($lockfh,LOCK_EX)) {
343: &logthis("<font color=blue>WARNING: ".
344: 'Could not obtain exclusive lock in appenv: '.$!);
345: $lockfh->close();
346: return 'error: '.$!;
347: }
348:
349: my @oldenv;
350: {
351: my $fh;
352: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
353: return 'error: '.$!;
354: }
355: @oldenv=<$fh>;
356: $fh->close();
357: }
358: for (my $i=0; $i<=$#oldenv; $i++) {
359: chomp($oldenv[$i]);
360: if ($oldenv[$i] ne '') {
361: my ($name,$value)=split(/=/,$oldenv[$i]);
362: unless (defined($newenv{$name})) {
363: $newenv{$name}=$value;
364: }
365: }
366: }
367: {
368: my $fh;
369: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
370: return 'error';
371: }
372: my $newname;
373: foreach $newname (keys %newenv) {
374: print $fh "$newname=$newenv{$newname}\n";
375: }
376: $fh->close();
377: }
378:
379: $lockfh->close();
380: return 'ok';
381: }
382: # ----------------------------------------------------- Delete from Environment
383:
384: sub delenv {
385: my $delthis=shift;
386: my %newenv=();
387: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
388: &logthis("<font color=blue>WARNING: ".
389: "Attempt to delete from environment ".$delthis);
390: return 'error';
391: }
392: my @oldenv;
393: {
394: my $fh;
395: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
396: return 'error';
397: }
398: unless (flock($fh,LOCK_SH)) {
399: &logthis("<font color=blue>WARNING: ".
400: 'Could not obtain shared lock in delenv: '.$!);
401: $fh->close();
402: return 'error: '.$!;
403: }
404: @oldenv=<$fh>;
405: $fh->close();
406: }
407: {
408: my $fh;
409: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
410: return 'error';
411: }
412: unless (flock($fh,LOCK_EX)) {
413: &logthis("<font color=blue>WARNING: ".
414: 'Could not obtain exclusive lock in delenv: '.$!);
415: $fh->close();
416: return 'error: '.$!;
417: }
418: map {
419: unless ($_=~/^$delthis/) { print $fh $_; }
420: } @oldenv;
421: $fh->close();
422: }
423: return 'ok';
424: }
425:
426: # ------------------------------ Find server with least workload from spare.tab
427:
428: sub spareserver {
429: my $tryserver;
430: my $spareserver='';
431: my $lowestserver=100;
432: foreach $tryserver (keys %spareid) {
433: my $answer=reply('load',$tryserver);
434: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
435: $spareserver="http://$hostname{$tryserver}";
436: $lowestserver=$answer;
437: }
438: }
439: return $spareserver;
440: }
441:
442: # ----------------------- Try to determine user's current authentication scheme
443:
444: sub queryauthenticate {
445: my ($uname,$udom)=@_;
446: if (($perlvar{'lonRole'} eq 'library') &&
447: ($udom eq $perlvar{'lonDefDomain'})) {
448: my $answer=reply("encrypt:currentauth:$udom:$uname",
449: $perlvar{'lonHostID'});
450: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
451: if (length($answer)) {
452: return $answer;
453: }
454: else {
455: &logthis("User $uname at $udom lacks an authentication mechanism");
456: return 'no_host';
457: }
458: }
459: }
460:
461: my $tryserver;
462: foreach $tryserver (keys %libserv) {
463: if ($hostdom{$tryserver} eq $udom) {
464: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
465: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
466: if (length($answer)) {
467: return $answer;
468: }
469: else {
470: &logthis("User $uname at $udom lacks an authentication mechanism");
471: return 'no_host';
472: }
473: }
474: }
475: }
476: &logthis("User $uname at $udom lacks an authentication mechanism");
477: return 'no_host';
478: }
479:
480: # --------- Try to authenticate user from domain's lib servers (first this one)
481:
482: sub authenticate {
483: my ($uname,$upass,$udom)=@_;
484: $upass=escape($upass);
485: if (($perlvar{'lonRole'} eq 'library') &&
486: ($udom eq $perlvar{'lonDefDomain'})) {
487: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
488: if ($answer =~ /authorized/) {
489: if ($answer eq 'authorized') {
490: &logthis("User $uname at $udom authorized by local server");
491: return $perlvar{'lonHostID'};
492: }
493: if ($answer eq 'non_authorized') {
494: &logthis("User $uname at $udom rejected by local server");
495: return 'no_host';
496: }
497: }
498: }
499:
500: my $tryserver;
501: foreach $tryserver (keys %libserv) {
502: if ($hostdom{$tryserver} eq $udom) {
503: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
504: if ($answer =~ /authorized/) {
505: if ($answer eq 'authorized') {
506: &logthis("User $uname at $udom authorized by $tryserver");
507: return $tryserver;
508: }
509: if ($answer eq 'non_authorized') {
510: &logthis("User $uname at $udom rejected by $tryserver");
511: return 'no_host';
512: }
513: }
514: }
515: }
516: &logthis("User $uname at $udom could not be authenticated");
517: return 'no_host';
518: }
519:
520: # ---------------------- Find the homebase for a user from domain's lib servers
521:
522: sub homeserver {
523: my ($uname,$udom)=@_;
524:
525: my $index="$uname:$udom";
526: if ($homecache{$index}) { return "$homecache{$index}"; }
527:
528: my $tryserver;
529: foreach $tryserver (keys %libserv) {
530: if ($hostdom{$tryserver} eq $udom) {
531: my $answer=reply("home:$udom:$uname",$tryserver);
532: if ($answer eq 'found') {
533: $homecache{$index}=$tryserver;
534: return $tryserver;
535: }
536: }
537: }
538: return 'no_host';
539: }
540:
541: # ------------------------------------- Find the usernames behind a list of IDs
542:
543: sub idget {
544: my ($udom,@ids)=@_;
545: my %returnhash=();
546:
547: my $tryserver;
548: foreach $tryserver (keys %libserv) {
549: if ($hostdom{$tryserver} eq $udom) {
550: my $idlist=join('&',@ids);
551: $idlist=~tr/A-Z/a-z/;
552: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
553: my @answer=();
554: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
555: @answer=split(/\&/,$reply);
556: } ;
557: my $i;
558: for ($i=0;$i<=$#ids;$i++) {
559: if ($answer[$i]) {
560: $returnhash{$ids[$i]}=$answer[$i];
561: }
562: }
563: }
564: }
565: return %returnhash;
566: }
567:
568: # ------------------------------------- Find the IDs behind a list of usernames
569:
570: sub idrget {
571: my ($udom,@unames)=@_;
572: my %returnhash=();
573: map {
574: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
575: } @unames;
576: return %returnhash;
577: }
578:
579: # ------------------------------- Store away a list of names and associated IDs
580:
581: sub idput {
582: my ($udom,%ids)=@_;
583: my %servers=();
584: map {
585: my $uhom=&homeserver($_,$udom);
586: if ($uhom ne 'no_host') {
587: my $id=&escape($ids{$_});
588: $id=~tr/A-Z/a-z/;
589: my $unam=&escape($_);
590: if ($servers{$uhom}) {
591: $servers{$uhom}.='&'.$id.'='.$unam;
592: } else {
593: $servers{$uhom}=$id.'='.$unam;
594: }
595: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
596: }
597: } keys %ids;
598: map {
599: &critical('idput:'.$udom.':'.$servers{$_},$_);
600: } keys %servers;
601: }
602:
603: # ------------------------------------- Find the section of student in a course
604:
605: sub usection {
606: my ($udom,$unam,$courseid)=@_;
607: $courseid=~s/\_/\//g;
608: $courseid=~s/^(\w)/\/$1/;
609: map {
610: my ($key,$value)=split(/\=/,$_);
611: $key=&unescape($key);
612: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
613: my $section=$1;
614: if ($key eq $courseid.'_st') { $section=''; }
615: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
616: my $now=time;
617: my $notactive=0;
618: if ($start) {
619: if ($now<$start) { $notactive=1; }
620: }
621: if ($end) {
622: if ($now>$end) { $notactive=1; }
623: }
624: unless ($notactive) { return $section; }
625: }
626: } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
627: &homeserver($unam,$udom)));
628: return '-1';
629: }
630:
631: # ------------------------------------- Read an entry from a user's environment
632:
633: sub userenvironment {
634: my ($udom,$unam,@what)=@_;
635: my %returnhash=();
636: my @answer=split(/\&/,
637: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
638: &homeserver($unam,$udom)));
639: my $i;
640: for ($i=0;$i<=$#what;$i++) {
641: $returnhash{$what[$i]}=&unescape($answer[$i]);
642: }
643: return %returnhash;
644: }
645:
646: # ----------------------------- Subscribe to a resource, return URL if possible
647:
648: sub subscribe {
649: my $fname=shift;
650: my $author=$fname;
651: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
652: my ($udom,$uname)=split(/\//,$author);
653: my $home=homeserver($uname,$udom);
654: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
655: return 'not_found';
656: }
657: my $answer=reply("sub:$fname",$home);
658: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
659: $answer.=' by '.$home;
660: }
661: return $answer;
662: }
663:
664: # -------------------------------------------------------------- Replicate file
665:
666: sub repcopy {
667: my $filename=shift;
668: $filename=~s/\/+/\//g;
669: my $transname="$filename.in.transfer";
670: if ((-e $filename) || (-e $transname)) { return OK; }
671: my $remoteurl=subscribe($filename);
672: if ($remoteurl =~ /^con_lost by/) {
673: &logthis("Subscribe returned $remoteurl: $filename");
674: return HTTP_SERVICE_UNAVAILABLE;
675: } elsif ($remoteurl eq 'not_found') {
676: &logthis("Subscribe returned not_found: $filename");
677: return HTTP_NOT_FOUND;
678: } elsif ($remoteurl =~ /^rejected by/) {
679: &logthis("Subscribe returned $remoteurl: $filename");
680: return FORBIDDEN;
681: } elsif ($remoteurl eq 'directory') {
682: return OK;
683: } else {
684: my @parts=split(/\//,$filename);
685: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
686: if ($path ne "$perlvar{'lonDocRoot'}/res") {
687: &logthis("Malconfiguration for replication: $filename");
688: return HTTP_BAD_REQUEST;
689: }
690: my $count;
691: for ($count=5;$count<$#parts;$count++) {
692: $path.="/$parts[$count]";
693: if ((-e $path)!=1) {
694: mkdir($path,0777);
695: }
696: }
697: my $ua=new LWP::UserAgent;
698: my $request=new HTTP::Request('GET',"$remoteurl");
699: my $response=$ua->request($request,$transname);
700: if ($response->is_error()) {
701: unlink($transname);
702: my $message=$response->status_line;
703: &logthis("<font color=blue>WARNING:"
704: ." LWP get: $message: $filename</font>");
705: return HTTP_SERVICE_UNAVAILABLE;
706: } else {
707: if ($remoteurl!~/\.meta$/) {
708: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
709: my $mresponse=$ua->request($mrequest,$filename.'.meta');
710: if ($mresponse->is_error()) {
711: unlink($filename.'.meta');
712: &logthis(
713: "<font color=yellow>INFO: No metadata: $filename</font>");
714: }
715: }
716: rename($transname,$filename);
717: return OK;
718: }
719: }
720: }
721:
722: # --------------------------------------------------------- Server Side Include
723:
724: sub ssi {
725:
726: my ($fn,%form)=@_;
727:
728: my $ua=new LWP::UserAgent;
729:
730: my $request;
731:
732: if (%form) {
733: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
734: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
735: } else {
736: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
737: }
738:
739: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
740: my $response=$ua->request($request);
741:
742: return $response->content;
743: }
744:
745: # ------------------------------------------------------------------------- Log
746:
747: sub log {
748: my ($dom,$nam,$hom,$what)=@_;
749: return critical("log:$dom:$nam:$what",$hom);
750: }
751:
752: # ------------------------------------------------------------------ Course Log
753:
754: sub flushcourselogs {
755: &logthis('Flushing course log buffers');
756: map {
757: my $crsid=$_;
758: if (&reply('log:'.$ENV{'course.'.$crsid.'.domain'}.':'.
759: $ENV{'course.'.$crsid.'.num'}.':'.
760: &escape($courselogs{$crsid}),
761: $ENV{'course.'.$crsid.'.home'}) eq 'ok') {
762: delete $courselogs{$crsid};
763: } else {
764: &logthis('Failed to flush log buffer for '.$crsid);
765: if (length($courselogs{$crsid})>40000) {
766: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
767: " exceeded maximum size, deleting.</font>");
768: delete $courselogs{$crsid};
769: }
770: }
771: } keys %courselogs;
772: }
773:
774: sub courselog {
775: my $what=shift;
776: $what=time.':'.$what;
777: unless ($ENV{'request.course.id'}) { return ''; }
778: if (defined $courselogs{$ENV{'request.course.id'}}) {
779: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
780: } else {
781: $courselogs{$ENV{'request.course.id'}}.=$what;
782: }
783: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
784: &flushcourselogs();
785: }
786: }
787:
788: sub courseacclog {
789: my $fnsymb=shift;
790: unless ($ENV{'request.course.id'}) { return ''; }
791: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
792: if ($what=~/(problem|exam|quiz|assess|survey|form)$/) {
793: map {
794: if ($_=~/^form\.(.*)/) {
795: $what.=':'.$1.'='.$ENV{$_};
796: }
797: } keys %ENV;
798: }
799: &courselog($what);
800: }
801:
802: # ----------------------------------------------------------- Check out an item
803:
804: sub checkout {
805: my ($symb,$tuname,$tudom,$tcrsid)=@_;
806: my $now=time;
807: my $lonhost=$perlvar{'lonHostID'};
808: my $infostr=&escape(
809: $tuname.'&'.
810: $tudom.'&'.
811: $tcrsid.'&'.
812: $symb.'&'.
813: $now.'&'.$ENV{'REMOTE_ADDR'});
814: my $token=&reply('tmpput:'.$infostr,$lonhost);
815: if ($token=~/^error\:/) {
816: &logthis("<font color=blue>WARNING: ".
817: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
818: "</font>");
819: return '';
820: }
821:
822: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
823: $token=~tr/a-z/A-Z/;
824:
825: my %infohash=('resource.0.outtoken' => $token,
826: 'resource.0.checkouttime' => $now,
827: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
828:
829: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
830: return '';
831: } else {
832: &logthis("<font color=blue>WARNING: ".
833: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
834: "</font>");
835: }
836:
837: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
838: &escape('Checkout '.$infostr.' - '.
839: $token)) ne 'ok') {
840: return '';
841: } else {
842: &logthis("<font color=blue>WARNING: ".
843: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
844: "</font>");
845: }
846: return $token;
847: }
848:
849: # ------------------------------------------------------------ Check in an item
850:
851: sub checkin {
852: my $token=shift;
853: my $now=time;
854: my ($ta,$tb,$lonhost)=split(/\*/,$token);
855: $lonhost=~tr/A-Z/a-z/;
856: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
857: $dtoken=~s/\W/\_/g;
858: my ($tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
859: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
860:
861: unless (($tuname) && ($tudom)) {
862: &logthis('Check in '.$token.' ('.$dtoken.') failed');
863: return '';
864: }
865:
866: unless (&allowed('mgr',$tcrsid)) {
867: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
868: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
869: return '';
870: }
871:
872: my %infohash=('resource.0.intoken' => $token,
873: 'resource.0.checkintime' => $now,
874: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
875:
876: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
877: return '';
878: }
879:
880: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
881: &escape('Checkin - '.$token)) ne 'ok') {
882: return '';
883: }
884:
885: return ($symb,$tuname,$tudom,$tcrsid);
886: }
887:
888: # --------------------------------------------- Set Expire Date for Spreadsheet
889:
890: sub expirespread {
891: my ($uname,$udom,$stype,$usymb)=@_;
892: my $cid=$ENV{'request.course.id'};
893: if ($cid) {
894: my $now=time;
895: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
896: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
897: $ENV{'course.'.$cid.'.num'}.
898: ':nohist_expirationdates:'.
899: &escape($key).'='.$now,
900: $ENV{'course.'.$cid.'.home'})
901: }
902: return 'ok';
903: }
904:
905: # ----------------------------------------------------- Devalidate Spreadsheets
906:
907: sub devalidate {
908: my $symb=shift;
909: my $cid=$ENV{'request.course.id'};
910: if ($cid) {
911: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
912: my $status=
913: &del('nohist_calculatedsheet',
914: [$key.'studentcalc'],
915: $ENV{'course.'.$cid.'.domain'},
916: $ENV{'course.'.$cid.'.num'})
917: .' '.
918: &del('nohist_calculatedsheets_'.$cid,
919: [$key.'assesscalc:'.$symb]);
920: unless ($status eq 'ok ok') {
921: &logthis('Could not devalidate spreadsheet '.
922: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
923: $symb.': '.$status);
924: }
925: }
926: }
927:
928: sub hash2str {
929: my (%hash)=@_;
930: my $result='';
931: map { $result.=escape($_).'='.escape($hash{$_}).'&'; } keys %hash;
932: $result=~s/\&$//;
933: return $result;
934: }
935:
936: sub str2hash {
937: my ($string) = @_;
938: my %returnhash;
939: map {
940: my ($name,$value)=split(/\=/,$_);
941: $returnhash{&unescape($name)}=&unescape($value);
942: } split(/\&/,$string);
943: return %returnhash;
944: }
945:
946: # -------------------------------------------------------------------Temp Store
947:
948: sub tmpreset {
949: my ($symb,$namespace,$domain,$stuname) = @_;
950: if (!$symb) {
951: $symb=&symbread();
952: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
953: }
954: $symb=escape($symb);
955:
956: if (!$namespace) { $namespace=$ENV{'request.state'}; }
957: $namespace=~s/\//\_/g;
958: $namespace=~s/\W//g;
959:
960: #FIXME needs to do something for /pub resources
961: if (!$domain) { $domain=$ENV{'user.domain'}; }
962: if (!$stuname) { $stuname=$ENV{'user.name'}; }
963: my $path=$perlvar{'lonDaemons'}.'/tmp';
964: my %hash;
965: if (tie(%hash,'GDBM_File',
966: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
967: &GDBM_WRCREAT,0640)) {
968: foreach my $key (keys %hash) {
969: if ($key=~ /:$symb/) {
970: delete($hash{$key});
971: }
972: }
973: }
974: }
975:
976: sub tmpstore {
977: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
978:
979: if (!$symb) {
980: $symb=&symbread();
981: if (!$symb) { $symb= $ENV{'request.url'}; }
982: }
983: $symb=escape($symb);
984:
985: if (!$namespace) {
986: # I don't think we would ever want to store this for a course.
987: # it seems this will only be used if we don't have a course.
988: #$namespace=$ENV{'request.course.id'};
989: #if (!$namespace) {
990: $namespace=$ENV{'request.state'};
991: #}
992: }
993: $namespace=~s/\//\_/g;
994: $namespace=~s/\W//g;
995: #FIXME needs to do something for /pub resources
996: if (!$domain) { $domain=$ENV{'user.domain'}; }
997: if (!$stuname) { $stuname=$ENV{'user.name'}; }
998: my $now=time;
999: my %hash;
1000: my $path=$perlvar{'lonDaemons'}.'/tmp';
1001: if (tie(%hash,'GDBM_File',
1002: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1003: &GDBM_WRCREAT,0640)) {
1004: $hash{"version:$symb"}++;
1005: my $version=$hash{"version:$symb"};
1006: my $allkeys='';
1007: foreach my $key (keys(%$storehash)) {
1008: $allkeys.=$key.':';
1009: $hash{"$version:$symb:$key"}=$$storehash{$key};
1010: }
1011: $hash{"$version:$symb:timestamp"}=$now;
1012: $allkeys.='timestamp';
1013: $hash{"$version:keys:$symb"}=$allkeys;
1014: if (untie(%hash)) {
1015: return 'ok';
1016: } else {
1017: return "error:$!";
1018: }
1019: } else {
1020: return "error:$!";
1021: }
1022: }
1023:
1024: # -----------------------------------------------------------------Temp Restore
1025:
1026: sub tmprestore {
1027: my ($symb,$namespace,$domain,$stuname) = @_;
1028:
1029: if (!$symb) {
1030: $symb=&symbread();
1031: if (!$symb) { $symb= $ENV{'request.url'}; }
1032: }
1033: $symb=escape($symb);
1034:
1035: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1036: #FIXME needs to do something for /pub resources
1037: if (!$domain) { $domain=$ENV{'user.domain'}; }
1038: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1039:
1040: my %returnhash;
1041: $namespace=~s/\//\_/g;
1042: $namespace=~s/\W//g;
1043: my %hash;
1044: my $path=$perlvar{'lonDaemons'}.'/tmp';
1045: if (tie(%hash,'GDBM_File',
1046: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1047: &GDBM_READER,0640)) {
1048: my $version=$hash{"version:$symb"};
1049: $returnhash{'version'}=$version;
1050: my $scope;
1051: for ($scope=1;$scope<=$version;$scope++) {
1052: my $vkeys=$hash{"$scope:keys:$symb"};
1053: my @keys=split(/:/,$vkeys);
1054: my $key;
1055: $returnhash{"$scope:keys"}=$vkeys;
1056: foreach $key (@keys) {
1057: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1058: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1059: }
1060: }
1061: if (!(untie(%hash))) {
1062: return "error:$!";
1063: }
1064: } else {
1065: return "error:$!";
1066: }
1067: return %returnhash;
1068: }
1069:
1070: # ----------------------------------------------------------------------- Store
1071:
1072: sub store {
1073: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1074: my $home='';
1075:
1076: if ($stuname) { $home=&homeserver($stuname,$domain); }
1077:
1078: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1079:
1080: &devalidate($symb);
1081:
1082: $symb=escape($symb);
1083: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
1084: if (!$domain) { $domain=$ENV{'user.domain'}; }
1085: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1086: if (!$home) { $home=$ENV{'user.home'}; }
1087: my $namevalue='';
1088: map {
1089: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1090: } keys %$storehash;
1091: $namevalue=~s/\&$//;
1092: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1093: }
1094:
1095: # -------------------------------------------------------------- Critical Store
1096:
1097: sub cstore {
1098: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1099: my $home='';
1100:
1101: if ($stuname) { $home=&homeserver($stuname,$domain); }
1102:
1103: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1104:
1105: &devalidate($symb);
1106:
1107: $symb=escape($symb);
1108: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
1109: if (!$domain) { $domain=$ENV{'user.domain'}; }
1110: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1111: if (!$home) { $home=$ENV{'user.home'}; }
1112:
1113: my $namevalue='';
1114: map {
1115: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1116: } keys %$storehash;
1117: $namevalue=~s/\&$//;
1118: return critical("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1119: }
1120:
1121: # --------------------------------------------------------------------- Restore
1122:
1123: sub restore {
1124: my ($symb,$namespace,$domain,$stuname) = @_;
1125: my $home='';
1126:
1127: if ($stuname) { $home=&homeserver($stuname,$domain); }
1128:
1129: if (!$symb) {
1130: unless ($symb=escape(&symbread())) { return ''; }
1131: } else {
1132: $symb=&escape($symb);
1133: }
1134: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
1135: if (!$domain) { $domain=$ENV{'user.domain'}; }
1136: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1137: if (!$home) { $home=$ENV{'user.home'}; }
1138: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1139:
1140: my %returnhash=();
1141: map {
1142: my ($name,$value)=split(/\=/,$_);
1143: $returnhash{&unescape($name)}=&unescape($value);
1144: } split(/\&/,$answer);
1145: my $version;
1146: for ($version=1;$version<=$returnhash{'version'};$version++) {
1147: map {
1148: $returnhash{$_}=$returnhash{$version.':'.$_};
1149: } split(/\:/,$returnhash{$version.':keys'});
1150: }
1151: return %returnhash;
1152: }
1153:
1154: # ---------------------------------------------------------- Course Description
1155:
1156: sub coursedescription {
1157: my $courseid=shift;
1158: $courseid=~s/^\///;
1159: $courseid=~s/\_/\//g;
1160: my ($cdomain,$cnum)=split(/\//,$courseid);
1161: my $chome=&homeserver($cnum,$cdomain);
1162: if ($chome ne 'no_host') {
1163: my %returnhash=&dump('environment',$cdomain,$cnum);
1164: if (!exists($returnhash{'con_lost'})) {
1165: my $normalid=$cdomain.'_'.$cnum;
1166: my %envhash=();
1167: $returnhash{'home'}= $chome;
1168: $returnhash{'domain'} = $cdomain;
1169: $returnhash{'num'} = $cnum;
1170: while (my ($name,$value) = each %returnhash) {
1171: $envhash{'course.'.$normalid.'.'.$name}=$value;
1172: }
1173: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
1174: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1175: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1176: $envhash{'course.'.$normalid.'.last_cache'}=time;
1177: $envhash{'course.'.$normalid.'.home'}=$chome;
1178: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1179: $envhash{'course.'.$normalid.'.num'}=$cnum;
1180: &appenv(%envhash);
1181: return %returnhash;
1182: }
1183: }
1184: return ();
1185: }
1186:
1187: # -------------------------------------------------------- Get user privileges
1188:
1189: sub rolesinit {
1190: my ($domain,$username,$authhost)=@_;
1191: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1192: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1193: my %allroles=();
1194: my %thesepriv=();
1195: my $now=time;
1196: my $userroles="user.login.time=$now\n";
1197: my $thesestr;
1198:
1199: if ($rolesdump ne '') {
1200: map {
1201: if ($_!~/^rolesdef\&/) {
1202: my ($area,$role)=split(/=/,$_);
1203: $area=~s/\_\w\w$//;
1204: my ($trole,$tend,$tstart)=split(/_/,$role);
1205: $userroles.='user.role.'.$trole.'.'.$area.'='.
1206: $tstart.'.'.$tend."\n";
1207: if ($tend!=0) {
1208: if ($tend<$now) {
1209: $trole='';
1210: }
1211: }
1212: if ($tstart!=0) {
1213: if ($tstart>$now) {
1214: $trole='';
1215: }
1216: }
1217: if (($area ne '') && ($trole ne '')) {
1218: my $spec=$trole.'.'.$area;
1219: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1220: if ($trole =~ /^cr\//) {
1221: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1222: my $homsvr=homeserver($rauthor,$rdomain);
1223: if ($hostname{$homsvr} ne '') {
1224: my $roledef=
1225: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1226: $homsvr);
1227: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1228: my ($syspriv,$dompriv,$coursepriv)=
1229: split(/\_/,unescape($roledef));
1230: $allroles{'cm./'}.=':'.$syspriv;
1231: $allroles{$spec.'./'}.=':'.$syspriv;
1232: if ($tdomain ne '') {
1233: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1234: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1235: if ($trest ne '') {
1236: $allroles{'cm.'.$area}.=':'.$coursepriv;
1237: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1238: }
1239: }
1240: }
1241: }
1242: } else {
1243: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1244: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1245: if ($tdomain ne '') {
1246: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1247: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1248: if ($trest ne '') {
1249: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1250: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1251: }
1252: }
1253: }
1254: }
1255: }
1256: } split(/&/,$rolesdump);
1257: my $adv=0;
1258: my $author=0;
1259: map {
1260: %thesepriv=();
1261: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1262: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1263: map {
1264: if ($_ ne '') {
1265: my ($privilege,$restrictions)=split(/&/,$_);
1266: if ($restrictions eq '') {
1267: $thesepriv{$privilege}='F';
1268: } else {
1269: if ($thesepriv{$privilege} ne 'F') {
1270: $thesepriv{$privilege}.=$restrictions;
1271: }
1272: }
1273: }
1274: } split(/:/,$allroles{$_});
1275: $thesestr='';
1276: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
1277: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1278: } keys %allroles;
1279: $userroles.='user.adv='.$adv."\n".
1280: 'user.author='.$author."\n";
1281: $ENV{'user.adv'}=$adv;
1282: }
1283: return $userroles;
1284: }
1285:
1286: # --------------------------------------------------------------- get interface
1287:
1288: sub get {
1289: my ($namespace,$storearr,$udomain,$uname)=@_;
1290: my $items='';
1291: map {
1292: $items.=escape($_).'&';
1293: } @$storearr;
1294: $items=~s/\&$//;
1295: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1296: if (!$uname) { $uname=$ENV{'user.name'}; }
1297: my $uhome=&homeserver($uname,$udomain);
1298:
1299: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1300: my @pairs=split(/\&/,$rep);
1301: my %returnhash=();
1302: my $i=0;
1303: map {
1304: $returnhash{$_}=unescape($pairs[$i]);
1305: $i++;
1306: } @$storearr;
1307: return %returnhash;
1308: }
1309:
1310: # --------------------------------------------------------------- del interface
1311:
1312: sub del {
1313: my ($namespace,$storearr,$udomain,$uname)=@_;
1314: my $items='';
1315: map {
1316: $items.=escape($_).'&';
1317: } @$storearr;
1318: $items=~s/\&$//;
1319: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1320: if (!$uname) { $uname=$ENV{'user.name'}; }
1321: my $uhome=&homeserver($uname,$udomain);
1322:
1323: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1324: }
1325:
1326: # -------------------------------------------------------------- dump interface
1327:
1328: sub dump {
1329: my ($namespace,$udomain,$uname)=@_;
1330: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1331: if (!$uname) { $uname=$ENV{'user.name'}; }
1332: my $uhome=&homeserver($uname,$udomain);
1333: my $rep=reply("dump:$udomain:$uname:$namespace",$uhome);
1334: my @pairs=split(/\&/,$rep);
1335: my %returnhash=();
1336: map {
1337: my ($key,$value)=split(/=/,$_);
1338: $returnhash{unescape($key)}=unescape($value);
1339: } @pairs;
1340: return %returnhash;
1341: }
1342:
1343: # --------------------------------------------------------------- put interface
1344:
1345: sub put {
1346: my ($namespace,$storehash,$udomain,$uname)=@_;
1347: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1348: if (!$uname) { $uname=$ENV{'user.name'}; }
1349: my $uhome=&homeserver($uname,$udomain);
1350: my $items='';
1351: map {
1352: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1353: } keys %$storehash;
1354: $items=~s/\&$//;
1355: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1356: }
1357:
1358: # ------------------------------------------------------ critical put interface
1359:
1360: sub cput {
1361: my ($namespace,$storehash,$udomain,$uname)=@_;
1362: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1363: if (!$uname) { $uname=$ENV{'user.name'}; }
1364: my $uhome=&homeserver($uname,$udomain);
1365: my $items='';
1366: map {
1367: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1368: } keys %$storehash;
1369: $items=~s/\&$//;
1370: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1371: }
1372:
1373: # -------------------------------------------------------------- eget interface
1374:
1375: sub eget {
1376: my ($namespace,$storearr,$udomain,$uname)=@_;
1377: my $items='';
1378: map {
1379: $items.=escape($_).'&';
1380: } @$storearr;
1381: $items=~s/\&$//;
1382: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1383: if (!$uname) { $uname=$ENV{'user.name'}; }
1384: my $uhome=&homeserver($uname,$udomain);
1385: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1386: my @pairs=split(/\&/,$rep);
1387: my %returnhash=();
1388: my $i=0;
1389: map {
1390: $returnhash{$_}=unescape($pairs[$i]);
1391: $i++;
1392: } @$storearr;
1393: return %returnhash;
1394: }
1395:
1396: # ------------------------------------------------- Check for a user privilege
1397:
1398: sub allowed {
1399: my ($priv,$uri)=@_;
1400:
1401: my $orguri=$uri;
1402: $uri=&declutter($uri);
1403:
1404: # Free bre access to adm and meta resources
1405:
1406: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1407: return 'F';
1408: }
1409:
1410: # Free bre to public access
1411:
1412: if ($priv eq 'bre') {
1413: if (&metadata($uri,'copyright') eq 'public') { return 'F'; }
1414: }
1415:
1416: my $thisallowed='';
1417: my $statecond=0;
1418: my $courseprivid='';
1419:
1420: # Course
1421:
1422: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1423: $thisallowed.=$1;
1424: }
1425:
1426: # Domain
1427:
1428: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1429: =~/$priv\&([^\:]*)/) {
1430: $thisallowed.=$1;
1431: }
1432:
1433: # Course: uri itself is a course
1434: my $courseuri=$uri;
1435: $courseuri=~s/\_(\d)/\/$1/;
1436: $courseuri=~s/^([^\/])/\/$1/;
1437:
1438: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1439: =~/$priv\&([^\:]*)/) {
1440: $thisallowed.=$1;
1441: }
1442:
1443: # Full access at system, domain or course-wide level? Exit.
1444:
1445: if ($thisallowed=~/F/) {
1446: return 'F';
1447: }
1448:
1449: # If this is generating or modifying users, exit with special codes
1450:
1451: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1452: return $thisallowed;
1453: }
1454: #
1455: # Gathered so far: system, domain and course wide privileges
1456: #
1457: # Course: See if uri or referer is an individual resource that is part of
1458: # the course
1459:
1460: if ($ENV{'request.course.id'}) {
1461: $courseprivid=$ENV{'request.course.id'};
1462: if ($ENV{'request.course.sec'}) {
1463: $courseprivid.='/'.$ENV{'request.course.sec'};
1464: }
1465: $courseprivid=~s/\_/\//;
1466: my $checkreferer=1;
1467: my @uriparts=split(/\//,$uri);
1468: my $filename=$uriparts[$#uriparts];
1469: my $pathname=$uri;
1470: $pathname=~s/\/$filename$//;
1471: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1472: /\&$filename\:([\d\|]+)\&/) {
1473: $statecond=$1;
1474: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1475: =~/$priv\&([^\:]*)/) {
1476: $thisallowed.=$1;
1477: $checkreferer=0;
1478: }
1479: }
1480:
1481: if ($checkreferer) {
1482: my $refuri=$ENV{'httpref.'.$orguri};
1483:
1484: unless ($refuri) {
1485: map {
1486: if ($_=~/^httpref\..*\*/) {
1487: my $pattern=$_;
1488: $pattern=~s/^httpref\.\/res\///;
1489: $pattern=~s/\*/\[\^\/\]\+/g;
1490: $pattern=~s/\//\\\//g;
1491: if ($orguri=~/$pattern/) {
1492: $refuri=$ENV{$_};
1493: }
1494: }
1495: } keys %ENV;
1496: }
1497: if ($refuri) {
1498: $refuri=&declutter($refuri);
1499: my @uriparts=split(/\//,$refuri);
1500: my $filename=$uriparts[$#uriparts];
1501: my $pathname=$refuri;
1502: $pathname=~s/\/$filename$//;
1503: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1504: /\&$filename\:([\d\|]+)\&/) {
1505: my $refstatecond=$1;
1506: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1507: =~/$priv\&([^\:]*)/) {
1508: $thisallowed.=$1;
1509: $uri=$refuri;
1510: $statecond=$refstatecond;
1511: }
1512: }
1513: }
1514: }
1515: }
1516:
1517: #
1518: # Gathered now: all privileges that could apply, and condition number
1519: #
1520: #
1521: # Full or no access?
1522: #
1523:
1524: if ($thisallowed=~/F/) {
1525: return 'F';
1526: }
1527:
1528: unless ($thisallowed) {
1529: return '';
1530: }
1531:
1532: # Restrictions exist, deal with them
1533: #
1534: # C:according to course preferences
1535: # R:according to resource settings
1536: # L:unless locked
1537: # X:according to user session state
1538: #
1539:
1540: # Possibly locked functionality, check all courses
1541: # Locks might take effect only after 10 minutes cache expiration for other
1542: # courses, and 2 minutes for current course
1543:
1544: my $envkey;
1545: if ($thisallowed=~/L/) {
1546: foreach $envkey (keys %ENV) {
1547: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1548: my $courseid=$2;
1549: my $roleid=$1.'.'.$2;
1550: $courseid=~s/^\///;
1551: my $expiretime=600;
1552: if ($ENV{'request.role'} eq $roleid) {
1553: $expiretime=120;
1554: }
1555: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1556: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1557: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1558: &coursedescription($courseid);
1559: }
1560: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1561: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1562: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1563: &log($ENV{'user.domain'},$ENV{'user.name'},
1564: $ENV{'user.host'},
1565: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1566: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1567: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1568: return '';
1569: }
1570: }
1571: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1572: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1573: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1574: &log($ENV{'user.domain'},$ENV{'user.name'},
1575: $ENV{'user.host'},
1576: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1577: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1578: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1579: return '';
1580: }
1581: }
1582: }
1583: }
1584: }
1585:
1586: #
1587: # Rest of the restrictions depend on selected course
1588: #
1589:
1590: unless ($ENV{'request.course.id'}) {
1591: return '1';
1592: }
1593:
1594: #
1595: # Now user is definitely in a course
1596: #
1597:
1598:
1599: # Course preferences
1600:
1601: if ($thisallowed=~/C/) {
1602: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1603: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1604: =~/\,$rolecode\,/) {
1605: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1606: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1607: $ENV{'request.course.id'});
1608: return '';
1609: }
1610: }
1611:
1612: # Resource preferences
1613:
1614: if ($thisallowed=~/R/) {
1615: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1616: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1617: if (-e $filename) {
1618: my @content;
1619: {
1620: my $fh=Apache::File->new($filename);
1621: @content=<$fh>;
1622: }
1623: if (join('',@content)=~
1624: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1625: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1626: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1627: return '';
1628:
1629: }
1630: }
1631: }
1632:
1633: # Restricted by state?
1634:
1635: if ($thisallowed=~/X/) {
1636: if (&condval($statecond)) {
1637: return '2';
1638: } else {
1639: return '';
1640: }
1641: }
1642:
1643: return 'F';
1644: }
1645:
1646: # ----------------------------------------------------------------- Define Role
1647:
1648: sub definerole {
1649: if (allowed('mcr','/')) {
1650: my ($rolename,$sysrole,$domrole,$courole)=@_;
1651: map {
1652: my ($crole,$cqual)=split(/\&/,$_);
1653: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1654: if ($pr{'cr:s'}=~/$crole\&/) {
1655: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1656: return "refused:s:$crole&$cqual";
1657: }
1658: }
1659: } split('/',$sysrole);
1660: map {
1661: my ($crole,$cqual)=split(/\&/,$_);
1662: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1663: if ($pr{'cr:d'}=~/$crole\&/) {
1664: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1665: return "refused:d:$crole&$cqual";
1666: }
1667: }
1668: } split('/',$domrole);
1669: map {
1670: my ($crole,$cqual)=split(/\&/,$_);
1671: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1672: if ($pr{'cr:c'}=~/$crole\&/) {
1673: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1674: return "refused:c:$crole&$cqual";
1675: }
1676: }
1677: } split('/',$courole);
1678: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1679: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1680: "rolesdef_$rolename=".
1681: escape($sysrole.'_'.$domrole.'_'.$courole);
1682: return reply($command,$ENV{'user.home'});
1683: } else {
1684: return 'refused';
1685: }
1686: }
1687:
1688: # ---------------- Make a metadata query against the network of library servers
1689:
1690: sub metadata_query {
1691: my ($query,$custom,$customshow)=@_;
1692: my %rhash;
1693: for my $server (keys %libserv) {
1694: unless ($custom or $customshow) {
1695: my $reply=&reply("querysend:".&escape($query),$server);
1696: $rhash{$server}=$reply;
1697: }
1698: else {
1699: my $reply=&reply("querysend:".&escape($query).':'.
1700: &escape($custom).':'.&escape($customshow),
1701: $server);
1702: $rhash{$server}=$reply;
1703: }
1704: }
1705: return \%rhash;
1706: }
1707:
1708: # ------------------------------------------------------------------ Plain Text
1709:
1710: sub plaintext {
1711: my $short=shift;
1712: return $prp{$short};
1713: }
1714:
1715: # ------------------------------------------------------------------ Plain Text
1716:
1717: sub fileembstyle {
1718: my $ending=lc(shift);
1719: return $fe{$ending};
1720: }
1721:
1722: # ------------------------------------------------------------ Description Text
1723:
1724: sub filedescription {
1725: my $ending=lc(shift);
1726: return $fd{$ending};
1727: }
1728:
1729: # ----------------------------------------------------------------- Assign Role
1730:
1731: sub assignrole {
1732: my ($udom,$uname,$url,$role,$end,$start)=@_;
1733: my $mrole;
1734: if ($role =~ /^cr\//) {
1735: unless (&allowed('ccr',$url)) {
1736: &logthis('Refused custom assignrole: '.
1737: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1738: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1739: return 'refused';
1740: }
1741: $mrole='cr';
1742: } else {
1743: my $cwosec=$url;
1744: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1745: unless (&allowed('c'.$role,$cwosec)) {
1746: &logthis('Refused assignrole: '.
1747: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1748: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1749: return 'refused';
1750: }
1751: $mrole=$role;
1752: }
1753: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1754: "$udom:$uname:$url".'_'."$mrole=$role";
1755: if ($end) { $command.='_'.$end; }
1756: if ($start) {
1757: if ($end) {
1758: $command.='_'.$start;
1759: } else {
1760: $command.='_0_'.$start;
1761: }
1762: }
1763: return &reply($command,&homeserver($uname,$udom));
1764: }
1765:
1766: # -------------------------------------------------- Modify user authentication
1767: sub modifyuserauth {
1768: my ($udom,$uname,$umode,$upass)=@_;
1769: my $uhome=&homeserver($uname,$udom);
1770: &logthis('Call to modify user authentication'.$udom.', '.$uname.', '.
1771: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
1772: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
1773: &escape($upass),$uhome);
1774: unless ($reply eq 'ok') {
1775: return 'error: '.$reply;
1776: }
1777: return 'ok';
1778: }
1779:
1780: # --------------------------------------------------------------- Modify a user
1781:
1782:
1783: sub modifyuser {
1784: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1785: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1786: $umode.', '.$first.', '.$middle.', '.
1787: $last.', '.$gene.' by '.
1788: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1789: my $uhome=&homeserver($uname,$udom);
1790: # ----------------------------------------------------------------- Create User
1791: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1792: my $unhome='';
1793: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1794: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1795: } else {
1796: my $tryserver;
1797: my $loadm=10000000;
1798: foreach $tryserver (keys %libserv) {
1799: if ($hostdom{$tryserver} eq $udom) {
1800: my $answer=reply('load',$tryserver);
1801: if (($answer=~/\d+/) && ($answer<$loadm)) {
1802: $loadm=$answer;
1803: $unhome=$tryserver;
1804: }
1805: }
1806: }
1807: }
1808: if (($unhome eq '') || ($unhome eq 'no_host')) {
1809: return 'error: find home';
1810: }
1811: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1812: &escape($upass),$unhome);
1813: unless ($reply eq 'ok') {
1814: return 'error: '.$reply;
1815: }
1816: $uhome=&homeserver($uname,$udom);
1817: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1818: return 'error: verify home';
1819: }
1820: }
1821: # ---------------------------------------------------------------------- Add ID
1822: if ($uid) {
1823: $uid=~tr/A-Z/a-z/;
1824: my %uidhash=&idrget($udom,$uname);
1825: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1826: unless ($uid eq $uidhash{$uname}) {
1827: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1828: }
1829: } else {
1830: &idput($udom,($uname => $uid));
1831: }
1832: }
1833: # -------------------------------------------------------------- Add names, etc
1834: my %names=&get('environment',
1835: ['firstname','middlename','lastname','generation'],
1836: $udom,$uname);
1837: if ($first) { $names{'firstname'} = $first; }
1838: if ($middle) { $names{'middlename'} = $middle; }
1839: if ($last) { $names{'lastname'} = $last; }
1840: if ($gene) { $names{'generation'} = $gene; }
1841: my $reply = &put('environment', \%names, $udom,$uname);
1842: if ($reply ne 'ok') { return 'error: '.$reply; }
1843: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1844: $umode.', '.$first.', '.$middle.', '.
1845: $last.', '.$gene.' by '.
1846: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1847: return 'ok';
1848: }
1849:
1850: # -------------------------------------------------------------- Modify student
1851:
1852: sub modifystudent {
1853: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1854: $end,$start)=@_;
1855: my $cid='';
1856: unless ($cid=$ENV{'request.course.id'}) {
1857: return 'not_in_class';
1858: }
1859: # --------------------------------------------------------------- Make the user
1860: my $reply=&modifyuser
1861: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1862: unless ($reply eq 'ok') { return $reply; }
1863: my $uhome=&homeserver($uname,$udom);
1864: if (($uhome eq '') || ($uhome eq 'no_host')) {
1865: return 'error: no such user';
1866: }
1867: # -------------------------------------------------- Add student to course list
1868: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1869: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1870: &escape($uname.':'.$udom).'='.
1871: &escape($end.':'.$start),
1872: $ENV{'course.'.$cid.'.home'});
1873: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1874: return 'error: '.$reply;
1875: }
1876: # ---------------------------------------------------- Add student role to user
1877: my $uurl='/'.$cid;
1878: $uurl=~s/\_/\//g;
1879: if ($usec) {
1880: $uurl.='/'.$usec;
1881: }
1882: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1883: }
1884:
1885: # ------------------------------------------------- Write to course preferences
1886:
1887: sub writecoursepref {
1888: my ($courseid,%prefs)=@_;
1889: $courseid=~s/^\///;
1890: $courseid=~s/\_/\//g;
1891: my ($cdomain,$cnum)=split(/\//,$courseid);
1892: my $chome=homeserver($cnum,$cdomain);
1893: if (($chome eq '') || ($chome eq 'no_host')) {
1894: return 'error: no such course';
1895: }
1896: my $cstring='';
1897: map {
1898: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1899: } keys %prefs;
1900: $cstring=~s/\&$//;
1901: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1902: }
1903:
1904: # ---------------------------------------------------------- Make/modify course
1905:
1906: sub createcourse {
1907: my ($udom,$description,$url)=@_;
1908: $url=&declutter($url);
1909: my $cid='';
1910: unless (&allowed('ccc',$ENV{'user.domain'})) {
1911: return 'refused';
1912: }
1913: unless ($udom eq $ENV{'user.domain'}) {
1914: return 'refused';
1915: }
1916: # ------------------------------------------------------------------- Create ID
1917: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1918: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1919: # ----------------------------------------------- Make sure that does not exist
1920: my $uhome=&homeserver($uname,$udom);
1921: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1922: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1923: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1924: $uhome=&homeserver($uname,$udom);
1925: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1926: return 'error: unable to generate unique course-ID';
1927: }
1928: }
1929: # ------------------------------------------------------------- Make the course
1930: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1931: $ENV{'user.home'});
1932: unless ($reply eq 'ok') { return 'error: '.$reply; }
1933: $uhome=&homeserver($uname,$udom);
1934: if (($uhome eq '') || ($uhome eq 'no_host')) {
1935: return 'error: no such course';
1936: }
1937: &writecoursepref($udom.'_'.$uname,
1938: ('description' => $description,
1939: 'url' => $url));
1940: return '/'.$udom.'/'.$uname;
1941: }
1942:
1943: # ---------------------------------------------------------- Assign Custom Role
1944:
1945: sub assigncustomrole {
1946: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1947: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1948: $end,$start);
1949: }
1950:
1951: # ----------------------------------------------------------------- Revoke Role
1952:
1953: sub revokerole {
1954: my ($udom,$uname,$url,$role)=@_;
1955: my $now=time;
1956: return &assignrole($udom,$uname,$url,$role,$now);
1957: }
1958:
1959: # ---------------------------------------------------------- Revoke Custom Role
1960:
1961: sub revokecustomrole {
1962: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1963: my $now=time;
1964: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1965: }
1966:
1967: # ------------------------------------------------------------ Directory lister
1968:
1969: sub dirlist {
1970: my $uri=shift;
1971: $uri=~s/^\///;
1972: $uri=~s/\/$//;
1973: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1974: if ($udom) {
1975: if ($uname) {
1976: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1977: homeserver($uname,$udom));
1978: return split(/:/,$listing);
1979: } else {
1980: my $tryserver;
1981: my %allusers=();
1982: foreach $tryserver (keys %libserv) {
1983: if ($hostdom{$tryserver} eq $udom) {
1984: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1985: $tryserver);
1986: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1987: && ($listing ne 'con_lost')) {
1988: map {
1989: my ($entry,@stat)=split(/&/,$_);
1990: $allusers{$entry}=1;
1991: } split(/:/,$listing);
1992: }
1993: }
1994: }
1995: my $alluserstr='';
1996: map {
1997: $alluserstr.=$_.'&user:';
1998: } sort keys %allusers;
1999: $alluserstr=~s/:$//;
2000: return split(/:/,$alluserstr);
2001: }
2002: } else {
2003: my $tryserver;
2004: my %alldom=();
2005: foreach $tryserver (keys %libserv) {
2006: $alldom{$hostdom{$tryserver}}=1;
2007: }
2008: my $alldomstr='';
2009: map {
2010: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2011: } sort keys %alldom;
2012: $alldomstr=~s/:$//;
2013: return split(/:/,$alldomstr);
2014: }
2015: }
2016:
2017: # -------------------------------------------------------- Value of a Condition
2018:
2019: sub directcondval {
2020: my $number=shift;
2021: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2022: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2023: } else {
2024: return 2;
2025: }
2026: }
2027:
2028: sub condval {
2029: my $condidx=shift;
2030: my $result=0;
2031: my $allpathcond='';
2032: map {
2033: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2034: $allpathcond.=
2035: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2036: }
2037: } split(/\|/,$condidx);
2038: $allpathcond=~s/\|$//;
2039: if ($ENV{'request.course.id'}) {
2040: if ($allpathcond) {
2041: my $operand='|';
2042: my @stack;
2043: map {
2044: if ($_ eq '(') {
2045: push @stack,($operand,$result)
2046: } elsif ($_ eq ')') {
2047: my $before=pop @stack;
2048: if (pop @stack eq '&') {
2049: $result=$result>$before?$before:$result;
2050: } else {
2051: $result=$result>$before?$result:$before;
2052: }
2053: } elsif (($_ eq '&') || ($_ eq '|')) {
2054: $operand=$_;
2055: } else {
2056: my $new=directcondval($_);
2057: if ($operand eq '&') {
2058: $result=$result>$new?$new:$result;
2059: } else {
2060: $result=$result>$new?$result:$new;
2061: }
2062: }
2063: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
2064: }
2065: }
2066: return $result;
2067: }
2068:
2069: # --------------------------------------------------------- Value of a Variable
2070:
2071: sub EXT {
2072: my ($varname,$symbparm)=@_;
2073: unless ($varname) { return ''; }
2074: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2075: my $rest;
2076: if ($therest[0]) {
2077: $rest=join('.',@therest);
2078: } else {
2079: $rest='';
2080: }
2081: my $qualifierrest=$qualifier;
2082: if ($rest) { $qualifierrest.='.'.$rest; }
2083: my $spacequalifierrest=$space;
2084: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2085: if ($realm eq 'user') {
2086: # --------------------------------------------------------------- user.resource
2087: if ($space eq 'resource') {
2088: my %restored=&restore();
2089: return $restored{$qualifierrest};
2090: # ----------------------------------------------------------------- user.access
2091: } elsif ($space eq 'access') {
2092: return &allowed($qualifier,$rest);
2093: # ------------------------------------------ user.preferences, user.environment
2094: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2095: return $ENV{join('.',('environment',$qualifierrest))};
2096: # ----------------------------------------------------------------- user.course
2097: } elsif ($space eq 'course') {
2098: return $ENV{join('.',('request.course',$qualifier))};
2099: # ------------------------------------------------------------------- user.role
2100: } elsif ($space eq 'role') {
2101: my ($role,$where)=split(/\./,$ENV{'request.role'});
2102: if ($qualifier eq 'value') {
2103: return $role;
2104: } elsif ($qualifier eq 'extent') {
2105: return $where;
2106: }
2107: # ----------------------------------------------------------------- user.domain
2108: } elsif ($space eq 'domain') {
2109: return $ENV{'user.domain'};
2110: # ------------------------------------------------------------------- user.name
2111: } elsif ($space eq 'name') {
2112: return $ENV{'user.name'};
2113: # ---------------------------------------------------- Any other user namespace
2114: } else {
2115: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2116: my %reply=&get($space,[$item]);
2117: return $reply{$item};
2118: }
2119: } elsif ($realm eq 'request') {
2120: # ------------------------------------------------------------- request.browser
2121: if ($space eq 'browser') {
2122: return $ENV{'browser.'.$qualifier};
2123: # ------------------------------------------------------------ request.filename
2124: } else {
2125: return $ENV{'request.'.$spacequalifierrest};
2126: }
2127: } elsif ($realm eq 'course') {
2128: # ---------------------------------------------------------- course.description
2129: return $ENV{'course.'.$ENV{'request.course.id'}.'.'.
2130: $spacequalifierrest};
2131: } elsif ($realm eq 'resource') {
2132: if ($ENV{'request.course.id'}) {
2133:
2134: # print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2135:
2136:
2137: # ----------------------------------------------------- Cascading lookup scheme
2138: my $symbp;
2139: if ($symbparm) {
2140: $symbp=$symbparm;
2141: } else {
2142: $symbp=&symbread();
2143: }
2144: my $mapp=(split(/\_\_\_/,$symbp))[0];
2145:
2146: my $symbparm=$symbp.'.'.$spacequalifierrest;
2147: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2148:
2149: my $seclevel=
2150: $ENV{'request.course.id'}.'.['.
2151: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
2152: my $seclevelr=
2153: $ENV{'request.course.id'}.'.['.
2154: $ENV{'request.course.sec'}.'].'.$symbparm;
2155: my $seclevelm=
2156: $ENV{'request.course.id'}.'.['.
2157: $ENV{'request.course.sec'}.'].'.$mapparm;
2158:
2159: my $courselevel=
2160: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
2161: my $courselevelr=
2162: $ENV{'request.course.id'}.'.'.$symbparm;
2163: my $courselevelm=
2164: $ENV{'request.course.id'}.'.'.$mapparm;
2165:
2166: # ----------------------------------------------------------- first, check user
2167: my %resourcedata=get('resourcedata',
2168: [$courselevelr,$courselevelm,$courselevel]);
2169: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2170: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2171:
2172: if ($resourcedata{$courselevelr}) {
2173: return $resourcedata{$courselevelr}; }
2174: if ($resourcedata{$courselevelm}) {
2175: return $resourcedata{$courselevelm}; }
2176: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
2177:
2178: } else {
2179: if ($resourcedata{$courselevelr}!~/No such file/) {
2180: &logthis("<font color=blue>WARNING:".
2181: " Trying to get resource data for ".$ENV{'user.name'}." at "
2182: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
2183: "</font>");
2184: }
2185: }
2186:
2187: # -------------------------------------------------------- second, check course
2188:
2189: my $reply=&reply('get:'.
2190: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
2191: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2192: ':resourcedata:'.
2193: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
2194: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
2195: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
2196: if ($reply!~/^error\:/) {
2197: map {
2198: if ($_) { return &unescape($_); }
2199: } split(/\&/,$reply);
2200: }
2201: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
2202: &logthis("<font color=blue>WARNING:".
2203: " Getting ".$reply." asking for ".$varname." for ".
2204: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2205: ' at '.
2206: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
2207: ' from '.
2208: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
2209: "</font>");
2210: }
2211: # ------------------------------------------------------ third, check map parms
2212: my %parmhash=();
2213: my $thisparm='';
2214: if (tie(%parmhash,'GDBM_File',
2215: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
2216: $thisparm=$parmhash{$symbparm};
2217: untie(%parmhash);
2218: }
2219: if ($thisparm) { return $thisparm; }
2220: }
2221:
2222: # --------------------------------------------- last, look in resource metadata
2223:
2224: $spacequalifierrest=~s/\./\_/;
2225: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2226: if ($metadata) { return $metadata; }
2227: $metadata=&metadata($ENV{'request.filename'},
2228: 'parameter_'.$spacequalifierrest);
2229: if ($metadata) { return $metadata; }
2230:
2231: # ------------------------------------------------------------------ Cascade up
2232:
2233: unless ($space eq '0') {
2234: my ($part,$id)=split(/\_/,$space);
2235: if ($id) {
2236: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2237: $symbparm);
2238: if ($partgeneral) { return $partgeneral; }
2239: } else {
2240: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2241: $symbparm);
2242: if ($resourcegeneral) { return $resourcegeneral; }
2243: }
2244: }
2245:
2246: # ---------------------------------------------------- Any other user namespace
2247: } elsif ($realm eq 'environment') {
2248: # ----------------------------------------------------------------- environment
2249: return $ENV{'environment.'.$spacequalifierrest};
2250: } elsif ($realm eq 'system') {
2251: # ----------------------------------------------------------------- system.time
2252: if ($space eq 'time') {
2253: return time;
2254: }
2255: }
2256: return '';
2257: }
2258:
2259: # ---------------------------------------------------------------- Get metadata
2260:
2261: sub metadata {
2262: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
2263:
2264: $uri=&declutter($uri);
2265: my $filename=$uri;
2266: $uri=~s/\.meta$//;
2267: #
2268: # Is the metadata already cached?
2269: # Look at timestamp of caching
2270: # Everything is cached by the main uri, libraries are never directly cached
2271: #
2272: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
2273: #
2274: # Is this a recursive call for a library?
2275: #
2276: if ($liburi) {
2277: $liburi=&declutter($liburi);
2278: $filename=$liburi;
2279: }
2280: my %metathesekeys=();
2281: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2282: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2283: my $parser=HTML::TokeParser->new(\$metastring);
2284: my $token;
2285: undef %metathesekeys;
2286: while ($token=$parser->get_token) {
2287: if ($token->[0] eq 'S') {
2288: if (defined($token->[2]->{'package'})) {
2289: #
2290: # This is a package - get package info
2291: #
2292: my $package=$token->[2]->{'package'};
2293: my $keyroot='';
2294: if ($prefix) {
2295: $keyroot.='_'.$prefix;
2296: } else {
2297: if (defined($token->[2]->{'part'})) {
2298: $keyroot.='_'.$token->[2]->{'part'};
2299: }
2300: }
2301: if (defined($token->[2]->{'id'})) {
2302: $keyroot.='_'.$token->[2]->{'id'};
2303: }
2304: if ($metacache{$uri.':packages'}) {
2305: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2306: } else {
2307: $metacache{$uri.':packages'}=$package.$keyroot;
2308: }
2309: map {
2310: if ($_=~/^$package\&/) {
2311: my ($pack,$name,$subp)=split(/\&/,$_);
2312: my $value=$packagetab{$_};
2313: my $part=$keyroot;
2314: $part=~s/^\_//;
2315: if ($subp eq 'display') {
2316: $value.=' [Part: '.$part.']';
2317: }
2318: my $unikey='parameter'.$keyroot.'_'.$name;
2319: $metathesekeys{$unikey}=1;
2320: $metacache{$uri.':'.$unikey.'.part'}=$part;
2321: unless
2322: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2323: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2324: }
2325: }
2326: } keys %packagetab;
2327: } else {
2328: #
2329: # This is not a package - some other kind of start tag
2330: #
2331: my $entry=$token->[1];
2332: my $unikey;
2333: if ($entry eq 'import') {
2334: $unikey='';
2335: } else {
2336: $unikey=$entry;
2337: }
2338: if ($prefix) {
2339: $unikey.=$prefix;
2340: } else {
2341: if (defined($token->[2]->{'part'})) {
2342: $unikey.='_'.$token->[2]->{'part'};
2343: }
2344: }
2345: if (defined($token->[2]->{'id'})) {
2346: $unikey.='_'.$token->[2]->{'id'};
2347: }
2348:
2349: if ($entry eq 'import') {
2350: #
2351: # Importing a library here
2352: #
2353: if (defined($depthcount)) { $depthcount++; } else
2354: { $depthcount=0; }
2355: if ($depthcount<20) {
2356: map {
2357: $metathesekeys{$_}=1;
2358: } split(/\,/,&metadata($uri,'keys',
2359: $parser->get_text('/import'),$unikey,
2360: $depthcount));
2361: }
2362: } else {
2363:
2364: if (defined($token->[2]->{'name'})) {
2365: $unikey.='_'.$token->[2]->{'name'};
2366: }
2367: $metathesekeys{$unikey}=1;
2368: map {
2369: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2370: } @{$token->[3]};
2371: unless (
2372: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
2373: ) { $metacache{$uri.':'.$unikey}=
2374: $metacache{$uri.':'.$unikey.'.default'};
2375: }
2376: # end of not-a-package not-a-library import
2377: }
2378: # end of not-a-package start tag
2379: }
2380: # the next is the end of "start tag"
2381: }
2382: }
2383: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2384: $metacache{$uri.':cachedtimestamp'}=time;
2385: # this is the end of "was not already recently cached
2386: }
2387: return $metacache{$uri.':'.$what};
2388: }
2389:
2390: # ------------------------------------------------- Update symbolic store links
2391:
2392: sub symblist {
2393: my ($mapname,%newhash)=@_;
2394: $mapname=declutter($mapname);
2395: my %hash;
2396: if (($ENV{'request.course.fn'}) && (%newhash)) {
2397: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2398: &GDBM_WRCREAT,0640)) {
2399: map {
2400: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2401: } keys %newhash;
2402: if (untie(%hash)) {
2403: return 'ok';
2404: }
2405: }
2406: }
2407: return 'error';
2408: }
2409:
2410: # ------------------------------------------------------ Return symb list entry
2411:
2412: sub symbread {
2413: my $thisfn=shift;
2414: unless ($thisfn) {
2415: if ($ENV{'request.symb'}) { return $ENV{'request.symb'}; }
2416: $thisfn=$ENV{'request.filename'};
2417: }
2418: $thisfn=declutter($thisfn);
2419: my %hash;
2420: my %bighash;
2421: my $syval='';
2422: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2423: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2424: &GDBM_READER,0640)) {
2425: $syval=$hash{$thisfn};
2426: untie(%hash);
2427: }
2428: # ---------------------------------------------------------- There was an entry
2429: if ($syval) {
2430: unless ($syval=~/\_\d+$/) {
2431: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2432: &appenv('request.ambiguous' => $thisfn);
2433: return '';
2434: }
2435: $syval.=$1;
2436: }
2437: } else {
2438: # ------------------------------------------------------- Was not in symb table
2439: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2440: &GDBM_READER,0640)) {
2441: # ---------------------------------------------- Get ID(s) for current resource
2442: my $ids=$bighash{'ids_/res/'.$thisfn};
2443: unless ($ids) {
2444: $ids=$bighash{'ids_/'.$thisfn};
2445: }
2446: if ($ids) {
2447: # ------------------------------------------------------------------- Has ID(s)
2448: my @possibilities=split(/\,/,$ids);
2449: if ($#possibilities==0) {
2450: # ----------------------------------------------- There is only one possibility
2451: my ($mapid,$resid)=split(/\./,$ids);
2452: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2453: } else {
2454: # ------------------------------------------ There is more than one possibility
2455: my $realpossible=0;
2456: map {
2457: my $file=$bighash{'src_'.$_};
2458: if (&allowed('bre',$file)) {
2459: my ($mapid,$resid)=split(/\./,$_);
2460: if ($bighash{'map_type_'.$mapid} ne 'page') {
2461: $realpossible++;
2462: $syval=declutter($bighash{'map_id_'.$mapid}).
2463: '___'.$resid;
2464: }
2465: }
2466: } @possibilities;
2467: if ($realpossible!=1) { $syval=''; }
2468: }
2469: }
2470: untie(%bighash)
2471: }
2472: }
2473: if ($syval) {
2474: return $syval.'___'.$thisfn;
2475: }
2476: }
2477: &appenv('request.ambiguous' => $thisfn);
2478: return '';
2479: }
2480:
2481: # ---------------------------------------------------------- Return random seed
2482:
2483: sub numval {
2484: my $txt=shift;
2485: $txt=~tr/A-J/0-9/;
2486: $txt=~tr/a-j/0-9/;
2487: $txt=~tr/K-T/0-9/;
2488: $txt=~tr/k-t/0-9/;
2489: $txt=~tr/U-Z/0-5/;
2490: $txt=~tr/u-z/0-5/;
2491: $txt=~s/\D//g;
2492: return int($txt);
2493: }
2494:
2495: sub rndseed {
2496: my ($symb,$courseid,$domain,$username)=@_;
2497: if (!$symb) {
2498: unless ($symb=&symbread()) { return time; }
2499: }
2500: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2501: if (!$domain) {$domain=$ENV{'user.domain'};}
2502: if (!$username) {$username=$ENV{'user.name'};}
2503: {
2504: use integer;
2505: my $symbchck=unpack("%32C*",$symb) << 27;
2506: my $symbseed=numval($symb) << 22;
2507: my $namechck=unpack("%32C*",$username) << 17;
2508: my $nameseed=numval($username) << 12;
2509: my $domainseed=unpack("%32C*",$domain) << 7;
2510: my $courseseed=unpack("%32C*",$courseid);
2511: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2512: #uncommenting these lines can break things!
2513: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2514: #&Apache::lonxml::debug("rndseed :$num:$symb");
2515: return $num;
2516: }
2517: }
2518:
2519: sub ireceipt {
2520: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2521: my $cuname=unpack("%32C*",$funame);
2522: my $cudom=unpack("%32C*",$fudom);
2523: my $cucourseid=unpack("%32C*",$fucourseid);
2524: my $cusymb=unpack("%32C*",$fusymb);
2525: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2526: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2527: ($cunique%$cuname+
2528: $cunique%$cudom+
2529: $cusymb%$cuname+
2530: $cusymb%$cudom+
2531: $cucourseid%$cuname+
2532: $cucourseid%$cudom);
2533: }
2534:
2535: sub receipt {
2536: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2537: $ENV{'request.course.id'},&symbread());
2538: }
2539:
2540: # ------------------------------------------------------------ Serves up a file
2541: # returns either the contents of the file or a -1
2542: sub getfile {
2543: my $file=shift;
2544: &repcopy($file);
2545: if (! -e $file ) { return -1; };
2546: my $fh=Apache::File->new($file);
2547: my $a='';
2548: while (<$fh>) { $a .=$_; }
2549: return $a
2550: }
2551:
2552: sub filelocation {
2553: my ($dir,$file) = @_;
2554: my $location;
2555: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2556: if ($file=~m:^/~:) { # is a contruction space reference
2557: $location = $file;
2558: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2559: } else {
2560: $file=~s/^$perlvar{'lonDocRoot'}//;
2561: $file=~s:^/*res::;
2562: if ( !( $file =~ m:^/:) ) {
2563: $location = $dir. '/'.$file;
2564: } else {
2565: $location = '/home/httpd/html/res'.$file;
2566: }
2567: }
2568: $location=~s://+:/:g; # remove duplicate /
2569: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2570: return $location;
2571: }
2572:
2573: sub hreflocation {
2574: my ($dir,$file)=@_;
2575: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
2576: my $finalpath=filelocation($dir,$file);
2577: $finalpath=~s/^\/home\/httpd\/html//;
2578: return $finalpath;
2579: } else {
2580: return $file;
2581: }
2582: }
2583:
2584: # ------------------------------------------------------------- Declutters URLs
2585:
2586: sub declutter {
2587: my $thisfn=shift;
2588: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2589: $thisfn=~s/^\///;
2590: $thisfn=~s/^res\///;
2591: return $thisfn;
2592: }
2593:
2594: # -------------------------------------------------------- Escape Special Chars
2595:
2596: sub escape {
2597: my $str=shift;
2598: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2599: return $str;
2600: }
2601:
2602: # ----------------------------------------------------- Un-Escape Special Chars
2603:
2604: sub unescape {
2605: my $str=shift;
2606: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2607: return $str;
2608: }
2609:
2610: # ================================================================ Main Program
2611:
2612: sub goodbye {
2613: &flushcourselogs();
2614: &logthis("Shutting down");
2615: }
2616:
2617: BEGIN {
2618: # ------------------------------------------------------------ Read access.conf
2619: {
2620: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2621:
2622: while (my $configline=<$config>) {
2623: if ($configline =~ /PerlSetVar/) {
2624: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2625: chomp($varvalue);
2626: $perlvar{$varname}=$varvalue;
2627: }
2628: }
2629: }
2630:
2631: # ------------------------------------------------------------- Read hosts file
2632: {
2633: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2634:
2635: while (my $configline=<$config>) {
2636: chomp($configline);
2637: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2638: $hostname{$id}=$name;
2639: $hostdom{$id}=$domain;
2640: $hostip{$id}=$ip;
2641: if ($role eq 'library') { $libserv{$id}=$name; }
2642: }
2643: }
2644:
2645: # ------------------------------------------------------ Read spare server file
2646: {
2647: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2648:
2649: while (my $configline=<$config>) {
2650: chomp($configline);
2651: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2652: $spareid{$configline}=1;
2653: }
2654: }
2655: }
2656: # ------------------------------------------------------------ Read permissions
2657: {
2658: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2659:
2660: while (my $configline=<$config>) {
2661: chomp($configline);
2662: if ($configline) {
2663: my ($role,$perm)=split(/ /,$configline);
2664: if ($perm ne '') { $pr{$role}=$perm; }
2665: }
2666: }
2667: }
2668:
2669: # -------------------------------------------- Read plain texts for permissions
2670: {
2671: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2672:
2673: while (my $configline=<$config>) {
2674: chomp($configline);
2675: if ($configline) {
2676: my ($short,$plain)=split(/:/,$configline);
2677: if ($plain ne '') { $prp{$short}=$plain; }
2678: }
2679: }
2680: }
2681:
2682: # ---------------------------------------------------------- Read package table
2683: {
2684: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
2685:
2686: while (my $configline=<$config>) {
2687: chomp($configline);
2688: my ($short,$plain)=split(/:/,$configline);
2689: my ($pack,$name)=split(/\&/,$short);
2690: if ($plain ne '') {
2691: $packagetab{$pack.'&'.$name.'&name'}=$name;
2692: $packagetab{$short}=$plain;
2693: }
2694: }
2695: }
2696:
2697: # ------------------------------------------------------------- Read file types
2698: {
2699: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2700:
2701: while (my $configline=<$config>) {
2702: next if ($configline =~ /^\#/);
2703: chomp($configline);
2704: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2705: if ($descr[0] ne '') {
2706: $fe{$ending}=lc($emb);
2707: $fd{$ending}=join(' ',@descr);
2708: }
2709: }
2710: }
2711:
2712: %metacache=();
2713:
2714: &logtouch();
2715: &logthis('<font color=yellow>INFO: Read configuration</font>');
2716: }
2717:
2718: 1;
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