1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.182 2001/12/05 14:48:28 matthew 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: #
65: # $Id: lonnet.pm,v 1.182 2001/12/05 14:48:28 matthew Exp $
66: #
67: ###
68:
69: # Functions for use by content handlers:
70: #
71: # metadata_query(sql-query-string,custom-metadata-regex) :
72: # returns file handle of where sql and
73: # regex results will be stored for query
74: # plaintext(short) : plain text explanation of short term
75: # fileembstyle(ext) : embed style in page for file extension
76: # filedescription(ext) : descriptor text for file extension
77: # allowed(short,url) : returns codes for allowed actions
78: # F: full access
79: # U,I,K: authentication modes (cxx only)
80: # '': forbidden
81: # 1: user needs to choose course
82: # 2: browse allowed
83: # definerole(rolename,sys,dom,cou) : define a custom role rolename
84: # set privileges in format of lonTabs/roles.tab for
85: # system, domain and course level,
86: # assignrole(udom,uname,url,role,end,start) : give a role to a user for the
87: # level given by url. Optional start and end dates
88: # (leave empty string or zero for "no date")
89: # assigncustomrole (udom,uname,url,rdom,rnam,rolename,end,start) : give a
90: # custom role to a user for the level given by url.
91: # Specify name and domain of role author, and role name
92: # revokerole (udom,uname,url,role) : Revoke a role for url
93: # revokecustomrole (udom,uname,url,rdom,rnam,rolename) : Revoke a custom role
94: # appenv(hash) : adds hash to session environment
95: # delenv(varname) : deletes all environment entries starting with varname
96: # store(hashref,symb,courseid,udom,uname)
97: # : stores hash permanently for this url
98: # hashref needs to be given, and should be a \%hashname
99: # the remaining args aren't required and if they aren't
100: # passed or are '' they will be derived from the ENV
101: # cstore(hashref,symb,courseid,udom,uname)
102: # : same as store but uses the critical interface to
103: # guarentee a store
104: # restore(symb,courseid,udom,uname)
105: # : returns hash for this symb, all args are optional
106: # if they aren't given they will be derived from the
107: # current enviroment
108: #
109: #
110: # for the next 6 functions udom and uname are optional
111: # if supplied they use udom as the domain and uname
112: # as the username for the function (supply a courseid
113: # for the uname if you want a course database)
114: # if not supplied it uses %ENV and looks at
115: # user. attribute for the values
116: #
117: # eget(namesp,arrayref,udom,uname)
118: # : returns hash with keys from array reference filled
119: # in from namesp (encrypts the return communication)
120: # get(namesp,arrayref,udom,uname)
121: # : returns hash with keys from array reference filled
122: # in from namesp
123: # dump(namesp,udom,uname) : dumps the complete namespace into a hash
124: # del(namesp,array,udom,uname) : deletes keys out of array from namesp
125: # put(namesp,hash,udom,uname) : stores hash in namesp
126: # cput(namesp,hash,udom,uname) : critical put
127: #
128: #
129: # ssi(url,hash) : does a complete request cycle on url to localhost, posts
130: # hash
131: # coursedescription(id) : returns and caches course description for id
132: # repcopy(filename) : replicate file
133: # dirlist(url) : gets a directory listing
134: # directcondval(index) : reading condition value of single condition from
135: # state string
136: # condval(index) : value of condition index based on state
137: # EXT(name) : value of a variable
138: # symblist(map,hash) : Updates symbolic storage links
139: # symbread([filename]) : returns the data handle (filename optional)
140: # rndseed([symb,courseid,domain,uname])
141: # : returns a random seed, all arguments are optional,
142: # if they aren't sent it use the environment to derive
143: # them
144: # Note: if symb isn't sent and it can't get one from
145: # &symbread it will use the current time as it's return
146: # receipt() : returns a receipt to be given out to users
147: # getfile(filename) : returns the contents of filename, or a -1 if it can't
148: # be found, replicates and subscribes to the file
149: # filelocation(dir,file) : returns a fairly clean absolute reference to file
150: # from the directory dir
151: # hreflocation(dir,file) : same as filelocation, but for hrefs
152: # log(domain,user,home,msg) : write to permanent log for user
153: # usection(domain,user,courseid) : output of section name/number or '' for
154: # "not in course" and '-1' for "no section"
155: # userenvironment(domain,user,what) : puts out any environment parameter
156: # for a user
157: # idput(domain,hash) : writes IDs for users from hash (name=>id,name=>id)
158: # idget(domain,array): returns hash with usernames (id=>name,id=>name) for
159: # an array of IDs
160: # idrget(domain,array): returns hash with IDs for usernames (name=>id,...) for
161: # an array of names
162: # metadata(file,entry): returns the metadata entry for a file. entry='keys'
163: # returns a comma separated list of keys
164: #
165:
166: package Apache::lonnet;
167:
168: use strict;
169: use Apache::File;
170: use LWP::UserAgent();
171: use HTTP::Headers;
172: use vars
173: qw(%perlvar %hostname %homecache %hostip %spareid %hostdom %libserv %pr %prp %fe %fd $readit %metacache %packagetab %courselogs);
174: use IO::Socket;
175: use GDBM_File;
176: use Apache::Constants qw(:common :http);
177: use HTML::TokeParser;
178: use Fcntl qw(:flock);
179:
180: # --------------------------------------------------------------------- Logging
181:
182: sub logtouch {
183: my $execdir=$perlvar{'lonDaemons'};
184: unless (-e "$execdir/logs/lonnet.log") {
185: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
186: close $fh;
187: }
188: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
189: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
190: }
191:
192: sub logthis {
193: my $message=shift;
194: my $execdir=$perlvar{'lonDaemons'};
195: my $now=time;
196: my $local=localtime($now);
197: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
198: print $fh "$local ($$): $message\n";
199: return 1;
200: }
201:
202: sub logperm {
203: my $message=shift;
204: my $execdir=$perlvar{'lonDaemons'};
205: my $now=time;
206: my $local=localtime($now);
207: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
208: print $fh "$now:$message:$local\n";
209: return 1;
210: }
211:
212: # -------------------------------------------------- Non-critical communication
213: sub subreply {
214: my ($cmd,$server)=@_;
215: my $peerfile="$perlvar{'lonSockDir'}/$server";
216: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
217: Type => SOCK_STREAM,
218: Timeout => 10)
219: or return "con_lost";
220: print $client "$cmd\n";
221: my $answer=<$client>;
222: if (!$answer) { $answer="con_lost"; }
223: chomp($answer);
224: return $answer;
225: }
226:
227: sub reply {
228: my ($cmd,$server)=@_;
229: my $answer=subreply($cmd,$server);
230: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
231: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
232: &logthis("<font color=blue>WARNING:".
233: " $cmd to $server returned $answer</font>");
234: }
235: return $answer;
236: }
237:
238: # ----------------------------------------------------------- Send USR1 to lonc
239:
240: sub reconlonc {
241: my $peerfile=shift;
242: &logthis("Trying to reconnect for $peerfile");
243: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
244: if (my $fh=Apache::File->new("$loncfile")) {
245: my $loncpid=<$fh>;
246: chomp($loncpid);
247: if (kill 0 => $loncpid) {
248: &logthis("lonc at pid $loncpid responding, sending USR1");
249: kill USR1 => $loncpid;
250: sleep 1;
251: if (-e "$peerfile") { return; }
252: &logthis("$peerfile still not there, give it another try");
253: sleep 5;
254: if (-e "$peerfile") { return; }
255: &logthis(
256: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
257: } else {
258: &logthis(
259: "<font color=blue>WARNING:".
260: " lonc at pid $loncpid not responding, giving up</font>");
261: }
262: } else {
263: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
264: }
265: }
266:
267: # ------------------------------------------------------ Critical communication
268:
269: sub critical {
270: my ($cmd,$server)=@_;
271: unless ($hostname{$server}) {
272: &logthis("<font color=blue>WARNING:".
273: " Critical message to unknown server ($server)</font>");
274: return 'no_such_host';
275: }
276: my $answer=reply($cmd,$server);
277: if ($answer eq 'con_lost') {
278: my $pingreply=reply('ping',$server);
279: &reconlonc("$perlvar{'lonSockDir'}/$server");
280: my $pongreply=reply('pong',$server);
281: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
282: $answer=reply($cmd,$server);
283: if ($answer eq 'con_lost') {
284: my $now=time;
285: my $middlename=$cmd;
286: $middlename=substr($middlename,0,16);
287: $middlename=~s/\W//g;
288: my $dfilename=
289: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
290: {
291: my $dfh;
292: if ($dfh=Apache::File->new(">$dfilename")) {
293: print $dfh "$cmd\n";
294: }
295: }
296: sleep 2;
297: my $wcmd='';
298: {
299: my $dfh;
300: if ($dfh=Apache::File->new("$dfilename")) {
301: $wcmd=<$dfh>;
302: }
303: }
304: chomp($wcmd);
305: if ($wcmd eq $cmd) {
306: &logthis("<font color=blue>WARNING: ".
307: "Connection buffer $dfilename: $cmd</font>");
308: &logperm("D:$server:$cmd");
309: return 'con_delayed';
310: } else {
311: &logthis("<font color=red>CRITICAL:"
312: ." Critical connection failed: $server $cmd</font>");
313: &logperm("F:$server:$cmd");
314: return 'con_failed';
315: }
316: }
317: }
318: return $answer;
319: }
320:
321: # ---------------------------------------------------------- Append Environment
322:
323: sub appenv {
324: my %newenv=@_;
325: map {
326: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
327: &logthis("<font color=blue>WARNING: ".
328: "Attempt to modify environment ".$_." to ".$newenv{$_}
329: .'</font>');
330: delete($newenv{$_});
331: } else {
332: $ENV{$_}=$newenv{$_};
333: }
334: } keys %newenv;
335:
336: my $lockfh;
337: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
338: return 'error: '.$!;
339: }
340: unless (flock($lockfh,LOCK_EX)) {
341: &logthis("<font color=blue>WARNING: ".
342: 'Could not obtain exclusive lock in appenv: '.$!);
343: $lockfh->close();
344: return 'error: '.$!;
345: }
346:
347: my @oldenv;
348: {
349: my $fh;
350: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
351: return 'error: '.$!;
352: }
353: @oldenv=<$fh>;
354: $fh->close();
355: }
356: for (my $i=0; $i<=$#oldenv; $i++) {
357: chomp($oldenv[$i]);
358: if ($oldenv[$i] ne '') {
359: my ($name,$value)=split(/=/,$oldenv[$i]);
360: unless (defined($newenv{$name})) {
361: $newenv{$name}=$value;
362: }
363: }
364: }
365: {
366: my $fh;
367: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
368: return 'error';
369: }
370: my $newname;
371: foreach $newname (keys %newenv) {
372: print $fh "$newname=$newenv{$newname}\n";
373: }
374: $fh->close();
375: }
376:
377: $lockfh->close();
378: return 'ok';
379: }
380: # ----------------------------------------------------- Delete from Environment
381:
382: sub delenv {
383: my $delthis=shift;
384: my %newenv=();
385: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
386: &logthis("<font color=blue>WARNING: ".
387: "Attempt to delete from environment ".$delthis);
388: return 'error';
389: }
390: my @oldenv;
391: {
392: my $fh;
393: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
394: return 'error';
395: }
396: unless (flock($fh,LOCK_SH)) {
397: &logthis("<font color=blue>WARNING: ".
398: 'Could not obtain shared lock in delenv: '.$!);
399: $fh->close();
400: return 'error: '.$!;
401: }
402: @oldenv=<$fh>;
403: $fh->close();
404: }
405: {
406: my $fh;
407: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
408: return 'error';
409: }
410: unless (flock($fh,LOCK_EX)) {
411: &logthis("<font color=blue>WARNING: ".
412: 'Could not obtain exclusive lock in delenv: '.$!);
413: $fh->close();
414: return 'error: '.$!;
415: }
416: map {
417: unless ($_=~/^$delthis/) { print $fh $_; }
418: } @oldenv;
419: $fh->close();
420: }
421: return 'ok';
422: }
423:
424: # ------------------------------ Find server with least workload from spare.tab
425:
426: sub spareserver {
427: my $tryserver;
428: my $spareserver='';
429: my $lowestserver=100;
430: foreach $tryserver (keys %spareid) {
431: my $answer=reply('load',$tryserver);
432: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
433: $spareserver="http://$hostname{$tryserver}";
434: $lowestserver=$answer;
435: }
436: }
437: return $spareserver;
438: }
439:
440: # ----------------------- Try to determine user's current authentication scheme
441:
442: sub queryauthenticate {
443: my ($uname,$udom)=@_;
444: if (($perlvar{'lonRole'} eq 'library') &&
445: ($udom eq $perlvar{'lonDefDomain'})) {
446: my $answer=reply("encrypt:currentauth:$udom:$uname",
447: $perlvar{'lonHostID'});
448: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
449: if (length($answer)) {
450: return $answer;
451: }
452: else {
453: &logthis("User $uname at $udom lacks an authentication mechanism");
454: return 'no_host';
455: }
456: }
457: }
458:
459: my $tryserver;
460: foreach $tryserver (keys %libserv) {
461: if ($hostdom{$tryserver} eq $udom) {
462: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
463: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
464: if (length($answer)) {
465: return $answer;
466: }
467: else {
468: &logthis("User $uname at $udom lacks an authentication mechanism");
469: return 'no_host';
470: }
471: }
472: }
473: }
474: &logthis("User $uname at $udom lacks an authentication mechanism");
475: return 'no_host';
476: }
477:
478: # --------- Try to authenticate user from domain's lib servers (first this one)
479:
480: sub authenticate {
481: my ($uname,$upass,$udom)=@_;
482: $upass=escape($upass);
483: if (($perlvar{'lonRole'} eq 'library') &&
484: ($udom eq $perlvar{'lonDefDomain'})) {
485: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
486: if ($answer =~ /authorized/) {
487: if ($answer eq 'authorized') {
488: &logthis("User $uname at $udom authorized by local server");
489: return $perlvar{'lonHostID'};
490: }
491: if ($answer eq 'non_authorized') {
492: &logthis("User $uname at $udom rejected by local server");
493: return 'no_host';
494: }
495: }
496: }
497:
498: my $tryserver;
499: foreach $tryserver (keys %libserv) {
500: if ($hostdom{$tryserver} eq $udom) {
501: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
502: if ($answer =~ /authorized/) {
503: if ($answer eq 'authorized') {
504: &logthis("User $uname at $udom authorized by $tryserver");
505: return $tryserver;
506: }
507: if ($answer eq 'non_authorized') {
508: &logthis("User $uname at $udom rejected by $tryserver");
509: return 'no_host';
510: }
511: }
512: }
513: }
514: &logthis("User $uname at $udom could not be authenticated");
515: return 'no_host';
516: }
517:
518: # ---------------------- Find the homebase for a user from domain's lib servers
519:
520: sub homeserver {
521: my ($uname,$udom)=@_;
522:
523: my $index="$uname:$udom";
524: if ($homecache{$index}) { return "$homecache{$index}"; }
525:
526: my $tryserver;
527: foreach $tryserver (keys %libserv) {
528: if ($hostdom{$tryserver} eq $udom) {
529: my $answer=reply("home:$udom:$uname",$tryserver);
530: if ($answer eq 'found') {
531: $homecache{$index}=$tryserver;
532: return $tryserver;
533: }
534: }
535: }
536: return 'no_host';
537: }
538:
539: # ------------------------------------- Find the usernames behind a list of IDs
540:
541: sub idget {
542: my ($udom,@ids)=@_;
543: my %returnhash=();
544:
545: my $tryserver;
546: foreach $tryserver (keys %libserv) {
547: if ($hostdom{$tryserver} eq $udom) {
548: my $idlist=join('&',@ids);
549: $idlist=~tr/A-Z/a-z/;
550: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
551: my @answer=();
552: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
553: @answer=split(/\&/,$reply);
554: } ;
555: my $i;
556: for ($i=0;$i<=$#ids;$i++) {
557: if ($answer[$i]) {
558: $returnhash{$ids[$i]}=$answer[$i];
559: }
560: }
561: }
562: }
563: return %returnhash;
564: }
565:
566: # ------------------------------------- Find the IDs behind a list of usernames
567:
568: sub idrget {
569: my ($udom,@unames)=@_;
570: my %returnhash=();
571: map {
572: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
573: } @unames;
574: return %returnhash;
575: }
576:
577: # ------------------------------- Store away a list of names and associated IDs
578:
579: sub idput {
580: my ($udom,%ids)=@_;
581: my %servers=();
582: map {
583: my $uhom=&homeserver($_,$udom);
584: if ($uhom ne 'no_host') {
585: my $id=&escape($ids{$_});
586: $id=~tr/A-Z/a-z/;
587: my $unam=&escape($_);
588: if ($servers{$uhom}) {
589: $servers{$uhom}.='&'.$id.'='.$unam;
590: } else {
591: $servers{$uhom}=$id.'='.$unam;
592: }
593: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
594: }
595: } keys %ids;
596: map {
597: &critical('idput:'.$udom.':'.$servers{$_},$_);
598: } keys %servers;
599: }
600:
601: # ------------------------------------- Find the section of student in a course
602:
603: sub usection {
604: my ($udom,$unam,$courseid)=@_;
605: $courseid=~s/\_/\//g;
606: $courseid=~s/^(\w)/\/$1/;
607: map {
608: my ($key,$value)=split(/\=/,$_);
609: $key=&unescape($key);
610: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
611: my $section=$1;
612: if ($key eq $courseid.'_st') { $section=''; }
613: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
614: my $now=time;
615: my $notactive=0;
616: if ($start) {
617: if ($now<$start) { $notactive=1; }
618: }
619: if ($end) {
620: if ($now>$end) { $notactive=1; }
621: }
622: unless ($notactive) { return $section; }
623: }
624: } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
625: &homeserver($unam,$udom)));
626: return '-1';
627: }
628:
629: # ------------------------------------- Read an entry from a user's environment
630:
631: sub userenvironment {
632: my ($udom,$unam,@what)=@_;
633: my %returnhash=();
634: my @answer=split(/\&/,
635: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
636: &homeserver($unam,$udom)));
637: my $i;
638: for ($i=0;$i<=$#what;$i++) {
639: $returnhash{$what[$i]}=&unescape($answer[$i]);
640: }
641: return %returnhash;
642: }
643:
644: # ----------------------------- Subscribe to a resource, return URL if possible
645:
646: sub subscribe {
647: my $fname=shift;
648: my $author=$fname;
649: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
650: my ($udom,$uname)=split(/\//,$author);
651: my $home=homeserver($uname,$udom);
652: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
653: return 'not_found';
654: }
655: my $answer=reply("sub:$fname",$home);
656: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
657: $answer.=' by '.$home;
658: }
659: return $answer;
660: }
661:
662: # -------------------------------------------------------------- Replicate file
663:
664: sub repcopy {
665: my $filename=shift;
666: $filename=~s/\/+/\//g;
667: my $transname="$filename.in.transfer";
668: if ((-e $filename) || (-e $transname)) { return OK; }
669: my $remoteurl=subscribe($filename);
670: if ($remoteurl =~ /^con_lost by/) {
671: &logthis("Subscribe returned $remoteurl: $filename");
672: return HTTP_SERVICE_UNAVAILABLE;
673: } elsif ($remoteurl eq 'not_found') {
674: &logthis("Subscribe returned not_found: $filename");
675: return HTTP_NOT_FOUND;
676: } elsif ($remoteurl =~ /^rejected by/) {
677: &logthis("Subscribe returned $remoteurl: $filename");
678: return FORBIDDEN;
679: } elsif ($remoteurl eq 'directory') {
680: return OK;
681: } else {
682: my @parts=split(/\//,$filename);
683: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
684: if ($path ne "$perlvar{'lonDocRoot'}/res") {
685: &logthis("Malconfiguration for replication: $filename");
686: return HTTP_BAD_REQUEST;
687: }
688: my $count;
689: for ($count=5;$count<$#parts;$count++) {
690: $path.="/$parts[$count]";
691: if ((-e $path)!=1) {
692: mkdir($path,0777);
693: }
694: }
695: my $ua=new LWP::UserAgent;
696: my $request=new HTTP::Request('GET',"$remoteurl");
697: my $response=$ua->request($request,$transname);
698: if ($response->is_error()) {
699: unlink($transname);
700: my $message=$response->status_line;
701: &logthis("<font color=blue>WARNING:"
702: ." LWP get: $message: $filename</font>");
703: return HTTP_SERVICE_UNAVAILABLE;
704: } else {
705: if ($remoteurl!~/\.meta$/) {
706: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
707: my $mresponse=$ua->request($mrequest,$filename.'.meta');
708: if ($mresponse->is_error()) {
709: unlink($filename.'.meta');
710: &logthis(
711: "<font color=yellow>INFO: No metadata: $filename</font>");
712: }
713: }
714: rename($transname,$filename);
715: return OK;
716: }
717: }
718: }
719:
720: # --------------------------------------------------------- Server Side Include
721:
722: sub ssi {
723:
724: my ($fn,%form)=@_;
725:
726: my $ua=new LWP::UserAgent;
727:
728: my $request;
729:
730: if (%form) {
731: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
732: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
733: } else {
734: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
735: }
736:
737: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
738: my $response=$ua->request($request);
739:
740: return $response->content;
741: }
742:
743: # ------------------------------------------------------------------------- Log
744:
745: sub log {
746: my ($dom,$nam,$hom,$what)=@_;
747: return critical("log:$dom:$nam:$what",$hom);
748: }
749:
750: # ------------------------------------------------------------------ Course Log
751:
752: sub flushcourselogs {
753: &logthis('Flushing course log buffers');
754: map {
755: my $crsid=$_;
756: if (&reply('log:'.$ENV{'course.'.$crsid.'.domain'}.':'.
757: $ENV{'course.'.$crsid.'.num'}.':'.
758: &escape($courselogs{$crsid}),
759: $ENV{'course.'.$crsid.'.home'}) eq 'ok') {
760: delete $courselogs{$crsid};
761: } else {
762: &logthis('Failed to flush log buffer for '.$crsid);
763: if (length($courselogs{$crsid})>40000) {
764: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
765: " exceeded maximum size, deleting.</font>");
766: delete $courselogs{$crsid};
767: }
768: }
769: } keys %courselogs;
770: }
771:
772: sub courselog {
773: my $what=shift;
774: $what=time.':'.$what;
775: unless ($ENV{'request.course.id'}) { return ''; }
776: if (defined $courselogs{$ENV{'request.course.id'}}) {
777: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
778: } else {
779: $courselogs{$ENV{'request.course.id'}}.=$what;
780: }
781: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
782: &flushcourselogs();
783: }
784: }
785:
786: sub courseacclog {
787: my $fnsymb=shift;
788: unless ($ENV{'request.course.id'}) { return ''; }
789: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
790: if ($what=~/(problem|exam|quiz|assess|survey|form)$/) {
791: map {
792: if ($_=~/^form\.(.*)/) {
793: $what.=':'.$1.'='.$ENV{$_};
794: }
795: } keys %ENV;
796: }
797: &courselog($what);
798: }
799:
800: # ----------------------------------------------------------- Check out an item
801:
802: sub checkout {
803: my ($symb,$tuname,$tudom,$tcrsid)=@_;
804: my $now=time;
805: my $lonhost=$perlvar{'lonHostID'};
806: my $infostr=&escape(
807: $tuname.'&'.
808: $tudom.'&'.
809: $tcrsid.'&'.
810: $symb.'&'.
811: $now.'&'.$ENV{'REMOTE_ADDR'});
812: my $token=&reply('tmpput:'.$infostr,$lonhost);
813: if ($token=~/^error\:/) {
814: &logthis("<font color=blue>WARNING: ".
815: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
816: "</font>");
817: return '';
818: }
819:
820: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
821: $token=~tr/a-z/A-Z/;
822:
823: my %infohash=('resource.0.outtoken' => $token,
824: 'resource.0.checkouttime' => $now,
825: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
826:
827: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
828: return '';
829: } else {
830: &logthis("<font color=blue>WARNING: ".
831: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
832: "</font>");
833: }
834:
835: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
836: &escape('Checkout '.$infostr.' - '.
837: $token)) ne 'ok') {
838: return '';
839: } else {
840: &logthis("<font color=blue>WARNING: ".
841: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
842: "</font>");
843: }
844: return $token;
845: }
846:
847: # ------------------------------------------------------------ Check in an item
848:
849: sub checkin {
850: my $token=shift;
851: my $now=time;
852: my ($ta,$tb,$lonhost)=split(/\*/,$token);
853: $lonhost=~tr/A-Z/a-z/;
854: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
855: $dtoken=~s/\W/\_/g;
856: my ($tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
857: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
858:
859: unless (($tuname) && ($tudom)) {
860: &logthis('Check in '.$token.' ('.$dtoken.') failed');
861: return '';
862: }
863:
864: unless (&allowed('mgr',$tcrsid)) {
865: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
866: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
867: return '';
868: }
869:
870: my %infohash=('resource.0.intoken' => $token,
871: 'resource.0.checkintime' => $now,
872: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
873:
874: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
875: return '';
876: }
877:
878: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
879: &escape('Checkin - '.$token)) ne 'ok') {
880: return '';
881: }
882:
883: return ($symb,$tuname,$tudom,$tcrsid);
884: }
885:
886: # --------------------------------------------- Set Expire Date for Spreadsheet
887:
888: sub expirespread {
889: my ($uname,$udom,$stype,$usymb)=@_;
890: my $cid=$ENV{'request.course.id'};
891: if ($cid) {
892: my $now=time;
893: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
894: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
895: $ENV{'course.'.$cid.'.num'}.
896: ':nohist_expirationdates:'.
897: &escape($key).'='.$now,
898: $ENV{'course.'.$cid.'.home'})
899: }
900: return 'ok';
901: }
902:
903: # ----------------------------------------------------- Devalidate Spreadsheets
904:
905: sub devalidate {
906: my $symb=shift;
907: my $cid=$ENV{'request.course.id'};
908: if ($cid) {
909: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
910: my $status=
911: &del('nohist_calculatedsheet',
912: [$key.'studentcalc'],
913: $ENV{'course.'.$cid.'.domain'},
914: $ENV{'course.'.$cid.'.num'})
915: .' '.
916: &del('nohist_calculatedsheets_'.$cid,
917: [$key.'assesscalc:'.$symb]);
918: unless ($status eq 'ok ok') {
919: &logthis('Could not devalidate spreadsheet '.
920: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
921: $symb.': '.$status);
922: }
923: }
924: }
925:
926: sub hash2str {
927: my (%hash)=@_;
928: my $result='';
929: map { $result.=escape($_).'='.escape($hash{$_}).'&'; } keys %hash;
930: $result=~s/\&$//;
931: return $result;
932: }
933:
934: sub str2hash {
935: my ($string) = @_;
936: my %returnhash;
937: map {
938: my ($name,$value)=split(/\=/,$_);
939: $returnhash{&unescape($name)}=&unescape($value);
940: } split(/\&/,$string);
941: return %returnhash;
942: }
943:
944: # -------------------------------------------------------------------Temp Store
945:
946: sub tmpreset {
947: my ($symb,$namespace,$domain,$stuname) = @_;
948: if (!$symb) {
949: $symb=&symbread();
950: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
951: }
952: $symb=escape($symb);
953:
954: if (!$namespace) { $namespace=$ENV{'request.state'}; }
955: $namespace=~s/\//\_/g;
956: $namespace=~s/\W//g;
957:
958: #FIXME needs to do something for /pub resources
959: if (!$domain) { $domain=$ENV{'user.domain'}; }
960: if (!$stuname) { $stuname=$ENV{'user.name'}; }
961: my $path=$perlvar{'lonDaemons'}.'/tmp';
962: my %hash;
963: if (tie(%hash,'GDBM_File',
964: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
965: &GDBM_WRCREAT,0640)) {
966: foreach my $key (keys %hash) {
967: if ($key=~ /:$symb/) {
968: delete($hash{$key});
969: }
970: }
971: }
972: }
973:
974: sub tmpstore {
975: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
976:
977: if (!$symb) {
978: $symb=&symbread();
979: if (!$symb) { $symb= $ENV{'request.url'}; }
980: }
981: $symb=escape($symb);
982:
983: if (!$namespace) {
984: # I don't think we would ever want to store this for a course.
985: # it seems this will only be used if we don't have a course.
986: #$namespace=$ENV{'request.course.id'};
987: #if (!$namespace) {
988: $namespace=$ENV{'request.state'};
989: #}
990: }
991: $namespace=~s/\//\_/g;
992: $namespace=~s/\W//g;
993: #FIXME needs to do something for /pub resources
994: if (!$domain) { $domain=$ENV{'user.domain'}; }
995: if (!$stuname) { $stuname=$ENV{'user.name'}; }
996: my $now=time;
997: my %hash;
998: my $path=$perlvar{'lonDaemons'}.'/tmp';
999: if (tie(%hash,'GDBM_File',
1000: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1001: &GDBM_WRCREAT,0640)) {
1002: $hash{"version:$symb"}++;
1003: my $version=$hash{"version:$symb"};
1004: my $allkeys='';
1005: foreach my $key (keys(%$storehash)) {
1006: $allkeys.=$key.':';
1007: $hash{"$version:$symb:$key"}=$$storehash{$key};
1008: }
1009: $hash{"$version:$symb:timestamp"}=$now;
1010: $allkeys.='timestamp';
1011: $hash{"$version:keys:$symb"}=$allkeys;
1012: if (untie(%hash)) {
1013: return 'ok';
1014: } else {
1015: return "error:$!";
1016: }
1017: } else {
1018: return "error:$!";
1019: }
1020: }
1021:
1022: # -----------------------------------------------------------------Temp Restore
1023:
1024: sub tmprestore {
1025: my ($symb,$namespace,$domain,$stuname) = @_;
1026:
1027: if (!$symb) {
1028: $symb=&symbread();
1029: if (!$symb) { $symb= $ENV{'request.url'}; }
1030: }
1031: $symb=escape($symb);
1032:
1033: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1034: #FIXME needs to do something for /pub resources
1035: if (!$domain) { $domain=$ENV{'user.domain'}; }
1036: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1037:
1038: my %returnhash;
1039: $namespace=~s/\//\_/g;
1040: $namespace=~s/\W//g;
1041: my %hash;
1042: my $path=$perlvar{'lonDaemons'}.'/tmp';
1043: if (tie(%hash,'GDBM_File',
1044: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1045: &GDBM_READER,0640)) {
1046: my $version=$hash{"version:$symb"};
1047: $returnhash{'version'}=$version;
1048: my $scope;
1049: for ($scope=1;$scope<=$version;$scope++) {
1050: my $vkeys=$hash{"$scope:keys:$symb"};
1051: my @keys=split(/:/,$vkeys);
1052: my $key;
1053: $returnhash{"$scope:keys"}=$vkeys;
1054: foreach $key (@keys) {
1055: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1056: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1057: }
1058: }
1059: if (!(untie(%hash))) {
1060: return "error:$!";
1061: }
1062: } else {
1063: return "error:$!";
1064: }
1065: return %returnhash;
1066: }
1067:
1068: # ----------------------------------------------------------------------- Store
1069:
1070: sub store {
1071: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1072: my $home='';
1073:
1074: if ($stuname) { $home=&homeserver($stuname,$domain); }
1075:
1076: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1077:
1078: &devalidate($symb);
1079:
1080: $symb=escape($symb);
1081: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
1082: if (!$domain) { $domain=$ENV{'user.domain'}; }
1083: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1084: if (!$home) { $home=$ENV{'user.home'}; }
1085: my $namevalue='';
1086: map {
1087: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1088: } keys %$storehash;
1089: $namevalue=~s/\&$//;
1090: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1091: }
1092:
1093: # -------------------------------------------------------------- Critical Store
1094:
1095: sub cstore {
1096: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1097: my $home='';
1098:
1099: if ($stuname) { $home=&homeserver($stuname,$domain); }
1100:
1101: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1102:
1103: &devalidate($symb);
1104:
1105: $symb=escape($symb);
1106: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
1107: if (!$domain) { $domain=$ENV{'user.domain'}; }
1108: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1109: if (!$home) { $home=$ENV{'user.home'}; }
1110:
1111: my $namevalue='';
1112: map {
1113: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1114: } keys %$storehash;
1115: $namevalue=~s/\&$//;
1116: return critical("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1117: }
1118:
1119: # --------------------------------------------------------------------- Restore
1120:
1121: sub restore {
1122: my ($symb,$namespace,$domain,$stuname) = @_;
1123: my $home='';
1124:
1125: if ($stuname) { $home=&homeserver($stuname,$domain); }
1126:
1127: if (!$symb) {
1128: unless ($symb=escape(&symbread())) { return ''; }
1129: } else {
1130: $symb=&escape($symb);
1131: }
1132: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
1133: if (!$domain) { $domain=$ENV{'user.domain'}; }
1134: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1135: if (!$home) { $home=$ENV{'user.home'}; }
1136: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1137:
1138: my %returnhash=();
1139: map {
1140: my ($name,$value)=split(/\=/,$_);
1141: $returnhash{&unescape($name)}=&unescape($value);
1142: } split(/\&/,$answer);
1143: my $version;
1144: for ($version=1;$version<=$returnhash{'version'};$version++) {
1145: map {
1146: $returnhash{$_}=$returnhash{$version.':'.$_};
1147: } split(/\:/,$returnhash{$version.':keys'});
1148: }
1149: return %returnhash;
1150: }
1151:
1152: # ---------------------------------------------------------- Course Description
1153:
1154: sub coursedescription {
1155: my $courseid=shift;
1156: $courseid=~s/^\///;
1157: $courseid=~s/\_/\//g;
1158: my ($cdomain,$cnum)=split(/\//,$courseid);
1159: my $chome=&homeserver($cnum,$cdomain);
1160: if ($chome ne 'no_host') {
1161: my %returnhash=&dump('environment',$cdomain,$cnum);
1162: if (!exists($returnhash{'con_lost'})) {
1163: my $normalid=$cdomain.'_'.$cnum;
1164: my %envhash=();
1165: $returnhash{'home'}= $chome;
1166: $returnhash{'domain'} = $cdomain;
1167: $returnhash{'num'} = $cnum;
1168: while (my ($name,$value) = each %returnhash) {
1169: $envhash{'course.'.$normalid.'.'.$name}=$value;
1170: }
1171: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
1172: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1173: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1174: $envhash{'course.'.$normalid.'.last_cache'}=time;
1175: $envhash{'course.'.$normalid.'.home'}=$chome;
1176: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1177: $envhash{'course.'.$normalid.'.num'}=$cnum;
1178: &appenv(%envhash);
1179: return %returnhash;
1180: }
1181: }
1182: return ();
1183: }
1184:
1185: # -------------------------------------------------------- Get user privileges
1186:
1187: sub rolesinit {
1188: my ($domain,$username,$authhost)=@_;
1189: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1190: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1191: my %allroles=();
1192: my %thesepriv=();
1193: my $now=time;
1194: my $userroles="user.login.time=$now\n";
1195: my $thesestr;
1196:
1197: if ($rolesdump ne '') {
1198: map {
1199: if ($_!~/^rolesdef\&/) {
1200: my ($area,$role)=split(/=/,$_);
1201: $area=~s/\_\w\w$//;
1202: my ($trole,$tend,$tstart)=split(/_/,$role);
1203: $userroles.='user.role.'.$trole.'.'.$area.'='.
1204: $tstart.'.'.$tend."\n";
1205: if ($tend!=0) {
1206: if ($tend<$now) {
1207: $trole='';
1208: }
1209: }
1210: if ($tstart!=0) {
1211: if ($tstart>$now) {
1212: $trole='';
1213: }
1214: }
1215: if (($area ne '') && ($trole ne '')) {
1216: my $spec=$trole.'.'.$area;
1217: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1218: if ($trole =~ /^cr\//) {
1219: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1220: my $homsvr=homeserver($rauthor,$rdomain);
1221: if ($hostname{$homsvr} ne '') {
1222: my $roledef=
1223: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1224: $homsvr);
1225: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1226: my ($syspriv,$dompriv,$coursepriv)=
1227: split(/\_/,unescape($roledef));
1228: $allroles{'cm./'}.=':'.$syspriv;
1229: $allroles{$spec.'./'}.=':'.$syspriv;
1230: if ($tdomain ne '') {
1231: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1232: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1233: if ($trest ne '') {
1234: $allroles{'cm.'.$area}.=':'.$coursepriv;
1235: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1236: }
1237: }
1238: }
1239: }
1240: } else {
1241: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1242: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1243: if ($tdomain ne '') {
1244: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1245: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1246: if ($trest ne '') {
1247: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1248: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1249: }
1250: }
1251: }
1252: }
1253: }
1254: } split(/&/,$rolesdump);
1255: my $adv=0;
1256: my $author=0;
1257: map {
1258: %thesepriv=();
1259: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1260: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1261: map {
1262: if ($_ ne '') {
1263: my ($privilege,$restrictions)=split(/&/,$_);
1264: if ($restrictions eq '') {
1265: $thesepriv{$privilege}='F';
1266: } else {
1267: if ($thesepriv{$privilege} ne 'F') {
1268: $thesepriv{$privilege}.=$restrictions;
1269: }
1270: }
1271: }
1272: } split(/:/,$allroles{$_});
1273: $thesestr='';
1274: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
1275: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1276: } keys %allroles;
1277: $userroles.='user.adv='.$adv."\n".
1278: 'user.author='.$author."\n";
1279: $ENV{'user.adv'}=$adv;
1280: }
1281: return $userroles;
1282: }
1283:
1284: # --------------------------------------------------------------- get interface
1285:
1286: sub get {
1287: my ($namespace,$storearr,$udomain,$uname)=@_;
1288: my $items='';
1289: map {
1290: $items.=escape($_).'&';
1291: } @$storearr;
1292: $items=~s/\&$//;
1293: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1294: if (!$uname) { $uname=$ENV{'user.name'}; }
1295: my $uhome=&homeserver($uname,$udomain);
1296:
1297: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1298: my @pairs=split(/\&/,$rep);
1299: my %returnhash=();
1300: my $i=0;
1301: map {
1302: $returnhash{$_}=unescape($pairs[$i]);
1303: $i++;
1304: } @$storearr;
1305: return %returnhash;
1306: }
1307:
1308: # --------------------------------------------------------------- del interface
1309:
1310: sub del {
1311: my ($namespace,$storearr,$udomain,$uname)=@_;
1312: my $items='';
1313: map {
1314: $items.=escape($_).'&';
1315: } @$storearr;
1316: $items=~s/\&$//;
1317: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1318: if (!$uname) { $uname=$ENV{'user.name'}; }
1319: my $uhome=&homeserver($uname,$udomain);
1320:
1321: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1322: }
1323:
1324: # -------------------------------------------------------------- dump interface
1325:
1326: sub dump {
1327: my ($namespace,$udomain,$uname)=@_;
1328: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1329: if (!$uname) { $uname=$ENV{'user.name'}; }
1330: my $uhome=&homeserver($uname,$udomain);
1331: my $rep=reply("dump:$udomain:$uname:$namespace",$uhome);
1332: my @pairs=split(/\&/,$rep);
1333: my %returnhash=();
1334: map {
1335: my ($key,$value)=split(/=/,$_);
1336: $returnhash{unescape($key)}=unescape($value);
1337: } @pairs;
1338: return %returnhash;
1339: }
1340:
1341: # --------------------------------------------------------------- put interface
1342:
1343: sub put {
1344: my ($namespace,$storehash,$udomain,$uname)=@_;
1345: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1346: if (!$uname) { $uname=$ENV{'user.name'}; }
1347: my $uhome=&homeserver($uname,$udomain);
1348: my $items='';
1349: map {
1350: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1351: } keys %$storehash;
1352: $items=~s/\&$//;
1353: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1354: }
1355:
1356: # ------------------------------------------------------ critical put interface
1357:
1358: sub cput {
1359: my ($namespace,$storehash,$udomain,$uname)=@_;
1360: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1361: if (!$uname) { $uname=$ENV{'user.name'}; }
1362: my $uhome=&homeserver($uname,$udomain);
1363: my $items='';
1364: map {
1365: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1366: } keys %$storehash;
1367: $items=~s/\&$//;
1368: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1369: }
1370:
1371: # -------------------------------------------------------------- eget interface
1372:
1373: sub eget {
1374: my ($namespace,$storearr,$udomain,$uname)=@_;
1375: my $items='';
1376: map {
1377: $items.=escape($_).'&';
1378: } @$storearr;
1379: $items=~s/\&$//;
1380: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1381: if (!$uname) { $uname=$ENV{'user.name'}; }
1382: my $uhome=&homeserver($uname,$udomain);
1383: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1384: my @pairs=split(/\&/,$rep);
1385: my %returnhash=();
1386: my $i=0;
1387: map {
1388: $returnhash{$_}=unescape($pairs[$i]);
1389: $i++;
1390: } @$storearr;
1391: return %returnhash;
1392: }
1393:
1394: # ------------------------------------------------- Check for a user privilege
1395:
1396: sub allowed {
1397: my ($priv,$uri)=@_;
1398:
1399: my $orguri=$uri;
1400: $uri=&declutter($uri);
1401:
1402: # Free bre access to adm and meta resources
1403:
1404: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1405: return 'F';
1406: }
1407:
1408: # Free bre to public access
1409:
1410: if ($priv eq 'bre') {
1411: if (&metadata($uri,'copyright') eq 'public') { return 'F'; }
1412: }
1413:
1414: my $thisallowed='';
1415: my $statecond=0;
1416: my $courseprivid='';
1417:
1418: # Course
1419:
1420: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1421: $thisallowed.=$1;
1422: }
1423:
1424: # Domain
1425:
1426: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1427: =~/$priv\&([^\:]*)/) {
1428: $thisallowed.=$1;
1429: }
1430:
1431: # Course: uri itself is a course
1432: my $courseuri=$uri;
1433: $courseuri=~s/\_(\d)/\/$1/;
1434: $courseuri=~s/^([^\/])/\/$1/;
1435:
1436: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1437: =~/$priv\&([^\:]*)/) {
1438: $thisallowed.=$1;
1439: }
1440:
1441: # Full access at system, domain or course-wide level? Exit.
1442:
1443: if ($thisallowed=~/F/) {
1444: return 'F';
1445: }
1446:
1447: # If this is generating or modifying users, exit with special codes
1448:
1449: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1450: return $thisallowed;
1451: }
1452: #
1453: # Gathered so far: system, domain and course wide privileges
1454: #
1455: # Course: See if uri or referer is an individual resource that is part of
1456: # the course
1457:
1458: if ($ENV{'request.course.id'}) {
1459: $courseprivid=$ENV{'request.course.id'};
1460: if ($ENV{'request.course.sec'}) {
1461: $courseprivid.='/'.$ENV{'request.course.sec'};
1462: }
1463: $courseprivid=~s/\_/\//;
1464: my $checkreferer=1;
1465: my @uriparts=split(/\//,$uri);
1466: my $filename=$uriparts[$#uriparts];
1467: my $pathname=$uri;
1468: $pathname=~s/\/$filename$//;
1469: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1470: /\&$filename\:([\d\|]+)\&/) {
1471: $statecond=$1;
1472: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1473: =~/$priv\&([^\:]*)/) {
1474: $thisallowed.=$1;
1475: $checkreferer=0;
1476: }
1477: }
1478:
1479: if ($checkreferer) {
1480: my $refuri=$ENV{'httpref.'.$orguri};
1481:
1482: unless ($refuri) {
1483: map {
1484: if ($_=~/^httpref\..*\*/) {
1485: my $pattern=$_;
1486: $pattern=~s/^httpref\.\/res\///;
1487: $pattern=~s/\*/\[\^\/\]\+/g;
1488: $pattern=~s/\//\\\//g;
1489: if ($orguri=~/$pattern/) {
1490: $refuri=$ENV{$_};
1491: }
1492: }
1493: } keys %ENV;
1494: }
1495: if ($refuri) {
1496: $refuri=&declutter($refuri);
1497: my @uriparts=split(/\//,$refuri);
1498: my $filename=$uriparts[$#uriparts];
1499: my $pathname=$refuri;
1500: $pathname=~s/\/$filename$//;
1501: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1502: /\&$filename\:([\d\|]+)\&/) {
1503: my $refstatecond=$1;
1504: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1505: =~/$priv\&([^\:]*)/) {
1506: $thisallowed.=$1;
1507: $uri=$refuri;
1508: $statecond=$refstatecond;
1509: }
1510: }
1511: }
1512: }
1513: }
1514:
1515: #
1516: # Gathered now: all privileges that could apply, and condition number
1517: #
1518: #
1519: # Full or no access?
1520: #
1521:
1522: if ($thisallowed=~/F/) {
1523: return 'F';
1524: }
1525:
1526: unless ($thisallowed) {
1527: return '';
1528: }
1529:
1530: # Restrictions exist, deal with them
1531: #
1532: # C:according to course preferences
1533: # R:according to resource settings
1534: # L:unless locked
1535: # X:according to user session state
1536: #
1537:
1538: # Possibly locked functionality, check all courses
1539: # Locks might take effect only after 10 minutes cache expiration for other
1540: # courses, and 2 minutes for current course
1541:
1542: my $envkey;
1543: if ($thisallowed=~/L/) {
1544: foreach $envkey (keys %ENV) {
1545: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1546: my $courseid=$2;
1547: my $roleid=$1.'.'.$2;
1548: $courseid=~s/^\///;
1549: my $expiretime=600;
1550: if ($ENV{'request.role'} eq $roleid) {
1551: $expiretime=120;
1552: }
1553: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1554: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1555: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1556: &coursedescription($courseid);
1557: }
1558: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1559: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1560: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1561: &log($ENV{'user.domain'},$ENV{'user.name'},
1562: $ENV{'user.host'},
1563: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1564: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1565: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1566: return '';
1567: }
1568: }
1569: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1570: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1571: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1572: &log($ENV{'user.domain'},$ENV{'user.name'},
1573: $ENV{'user.host'},
1574: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1575: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1576: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1577: return '';
1578: }
1579: }
1580: }
1581: }
1582: }
1583:
1584: #
1585: # Rest of the restrictions depend on selected course
1586: #
1587:
1588: unless ($ENV{'request.course.id'}) {
1589: return '1';
1590: }
1591:
1592: #
1593: # Now user is definitely in a course
1594: #
1595:
1596:
1597: # Course preferences
1598:
1599: if ($thisallowed=~/C/) {
1600: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1601: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1602: =~/\,$rolecode\,/) {
1603: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1604: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1605: $ENV{'request.course.id'});
1606: return '';
1607: }
1608: }
1609:
1610: # Resource preferences
1611:
1612: if ($thisallowed=~/R/) {
1613: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1614: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1615: if (-e $filename) {
1616: my @content;
1617: {
1618: my $fh=Apache::File->new($filename);
1619: @content=<$fh>;
1620: }
1621: if (join('',@content)=~
1622: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1623: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1624: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1625: return '';
1626:
1627: }
1628: }
1629: }
1630:
1631: # Restricted by state?
1632:
1633: if ($thisallowed=~/X/) {
1634: if (&condval($statecond)) {
1635: return '2';
1636: } else {
1637: return '';
1638: }
1639: }
1640:
1641: return 'F';
1642: }
1643:
1644: # ----------------------------------------------------------------- Define Role
1645:
1646: sub definerole {
1647: if (allowed('mcr','/')) {
1648: my ($rolename,$sysrole,$domrole,$courole)=@_;
1649: map {
1650: my ($crole,$cqual)=split(/\&/,$_);
1651: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1652: if ($pr{'cr:s'}=~/$crole\&/) {
1653: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1654: return "refused:s:$crole&$cqual";
1655: }
1656: }
1657: } split('/',$sysrole);
1658: map {
1659: my ($crole,$cqual)=split(/\&/,$_);
1660: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1661: if ($pr{'cr:d'}=~/$crole\&/) {
1662: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1663: return "refused:d:$crole&$cqual";
1664: }
1665: }
1666: } split('/',$domrole);
1667: map {
1668: my ($crole,$cqual)=split(/\&/,$_);
1669: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1670: if ($pr{'cr:c'}=~/$crole\&/) {
1671: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1672: return "refused:c:$crole&$cqual";
1673: }
1674: }
1675: } split('/',$courole);
1676: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1677: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1678: "rolesdef_$rolename=".
1679: escape($sysrole.'_'.$domrole.'_'.$courole);
1680: return reply($command,$ENV{'user.home'});
1681: } else {
1682: return 'refused';
1683: }
1684: }
1685:
1686: # ---------------- Make a metadata query against the network of library servers
1687:
1688: sub metadata_query {
1689: my ($query,$custom,$customshow)=@_;
1690: my %rhash;
1691: for my $server (keys %libserv) {
1692: unless ($custom or $customshow) {
1693: my $reply=&reply("querysend:".&escape($query),$server);
1694: $rhash{$server}=$reply;
1695: }
1696: else {
1697: my $reply=&reply("querysend:".&escape($query).':'.
1698: &escape($custom).':'.&escape($customshow),
1699: $server);
1700: $rhash{$server}=$reply;
1701: }
1702: }
1703: return \%rhash;
1704: }
1705:
1706: # ------------------------------------------------------------------ Plain Text
1707:
1708: sub plaintext {
1709: my $short=shift;
1710: return $prp{$short};
1711: }
1712:
1713: # ------------------------------------------------------------------ Plain Text
1714:
1715: sub fileembstyle {
1716: my $ending=lc(shift);
1717: return $fe{$ending};
1718: }
1719:
1720: # ------------------------------------------------------------ Description Text
1721:
1722: sub filedescription {
1723: my $ending=lc(shift);
1724: return $fd{$ending};
1725: }
1726:
1727: # ----------------------------------------------------------------- Assign Role
1728:
1729: sub assignrole {
1730: my ($udom,$uname,$url,$role,$end,$start)=@_;
1731: my $mrole;
1732: if ($role =~ /^cr\//) {
1733: unless (&allowed('ccr',$url)) {
1734: &logthis('Refused custom assignrole: '.
1735: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1736: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1737: return 'refused';
1738: }
1739: $mrole='cr';
1740: } else {
1741: my $cwosec=$url;
1742: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1743: unless (&allowed('c'.$role,$cwosec)) {
1744: &logthis('Refused assignrole: '.
1745: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1746: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1747: return 'refused';
1748: }
1749: $mrole=$role;
1750: }
1751: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1752: "$udom:$uname:$url".'_'."$mrole=$role";
1753: if ($end) { $command.='_'.$end; }
1754: if ($start) {
1755: if ($end) {
1756: $command.='_'.$start;
1757: } else {
1758: $command.='_0_'.$start;
1759: }
1760: }
1761: return &reply($command,&homeserver($uname,$udom));
1762: }
1763:
1764: # -------------------------------------------------- Modify user authentication
1765: sub modifyuserauth {
1766: my ($udom,$uname,$umode,$upass)=@_;
1767: my $uhome=&homeserver($uname,$udom);
1768: &logthis('Call to modify user authentication'.$udom.', '.$uname.', '.
1769: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
1770: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
1771: &escape($upass),$uhome);
1772: unless ($reply eq 'ok') {
1773: return 'error: '.$reply;
1774: }
1775: return 'ok';
1776: }
1777:
1778: # --------------------------------------------------------------- Modify a user
1779:
1780:
1781: sub modifyuser {
1782: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1783: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1784: $umode.', '.$first.', '.$middle.', '.
1785: $last.', '.$gene.' by '.
1786: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1787: my $uhome=&homeserver($uname,$udom);
1788: # ----------------------------------------------------------------- Create User
1789: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1790: my $unhome='';
1791: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1792: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1793: } else {
1794: my $tryserver;
1795: my $loadm=10000000;
1796: foreach $tryserver (keys %libserv) {
1797: if ($hostdom{$tryserver} eq $udom) {
1798: my $answer=reply('load',$tryserver);
1799: if (($answer=~/\d+/) && ($answer<$loadm)) {
1800: $loadm=$answer;
1801: $unhome=$tryserver;
1802: }
1803: }
1804: }
1805: }
1806: if (($unhome eq '') || ($unhome eq 'no_host')) {
1807: return 'error: find home';
1808: }
1809: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1810: &escape($upass),$unhome);
1811: unless ($reply eq 'ok') {
1812: return 'error: '.$reply;
1813: }
1814: $uhome=&homeserver($uname,$udom);
1815: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1816: return 'error: verify home';
1817: }
1818: }
1819: # ---------------------------------------------------------------------- Add ID
1820: if ($uid) {
1821: $uid=~tr/A-Z/a-z/;
1822: my %uidhash=&idrget($udom,$uname);
1823: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1824: unless ($uid eq $uidhash{$uname}) {
1825: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1826: }
1827: } else {
1828: &idput($udom,($uname => $uid));
1829: }
1830: }
1831: # -------------------------------------------------------------- Add names, etc
1832: my %names=&get('environment',
1833: ['firstname','middlename','lastname','generation'],
1834: $udom,$uname);
1835: if ($first) { $names{'firstname'} = $first; }
1836: if ($middle) { $names{'middlename'} = $middle; }
1837: if ($last) { $names{'lastname'} = $last; }
1838: if ($gene) { $names{'generation'} = $gene; }
1839: my $reply = &put('environment', \%names, $udom,$uname);
1840: if ($reply ne 'ok') { return 'error: '.$reply; }
1841: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1842: $umode.', '.$first.', '.$middle.', '.
1843: $last.', '.$gene.' by '.
1844: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1845: return 'ok';
1846: }
1847:
1848: # -------------------------------------------------------------- Modify student
1849:
1850: sub modifystudent {
1851: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1852: $end,$start)=@_;
1853: my $cid='';
1854: unless ($cid=$ENV{'request.course.id'}) {
1855: return 'not_in_class';
1856: }
1857: # --------------------------------------------------------------- Make the user
1858: my $reply=&modifyuser
1859: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1860: unless ($reply eq 'ok') { return $reply; }
1861: my $uhome=&homeserver($uname,$udom);
1862: if (($uhome eq '') || ($uhome eq 'no_host')) {
1863: return 'error: no such user';
1864: }
1865: # -------------------------------------------------- Add student to course list
1866: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1867: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1868: &escape($uname.':'.$udom).'='.
1869: &escape($end.':'.$start),
1870: $ENV{'course.'.$cid.'.home'});
1871: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1872: return 'error: '.$reply;
1873: }
1874: # ---------------------------------------------------- Add student role to user
1875: my $uurl='/'.$cid;
1876: $uurl=~s/\_/\//g;
1877: if ($usec) {
1878: $uurl.='/'.$usec;
1879: }
1880: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1881: }
1882:
1883: # ------------------------------------------------- Write to course preferences
1884:
1885: sub writecoursepref {
1886: my ($courseid,%prefs)=@_;
1887: $courseid=~s/^\///;
1888: $courseid=~s/\_/\//g;
1889: my ($cdomain,$cnum)=split(/\//,$courseid);
1890: my $chome=homeserver($cnum,$cdomain);
1891: if (($chome eq '') || ($chome eq 'no_host')) {
1892: return 'error: no such course';
1893: }
1894: my $cstring='';
1895: map {
1896: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1897: } keys %prefs;
1898: $cstring=~s/\&$//;
1899: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1900: }
1901:
1902: # ---------------------------------------------------------- Make/modify course
1903:
1904: sub createcourse {
1905: my ($udom,$description,$url)=@_;
1906: $url=&declutter($url);
1907: my $cid='';
1908: unless (&allowed('ccc',$ENV{'user.domain'})) {
1909: return 'refused';
1910: }
1911: unless ($udom eq $ENV{'user.domain'}) {
1912: return 'refused';
1913: }
1914: # ------------------------------------------------------------------- Create ID
1915: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1916: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1917: # ----------------------------------------------- Make sure that does not exist
1918: my $uhome=&homeserver($uname,$udom);
1919: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1920: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1921: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1922: $uhome=&homeserver($uname,$udom);
1923: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1924: return 'error: unable to generate unique course-ID';
1925: }
1926: }
1927: # ------------------------------------------------------------- Make the course
1928: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1929: $ENV{'user.home'});
1930: unless ($reply eq 'ok') { return 'error: '.$reply; }
1931: $uhome=&homeserver($uname,$udom);
1932: if (($uhome eq '') || ($uhome eq 'no_host')) {
1933: return 'error: no such course';
1934: }
1935: &writecoursepref($udom.'_'.$uname,
1936: ('description' => $description,
1937: 'url' => $url));
1938: return '/'.$udom.'/'.$uname;
1939: }
1940:
1941: # ---------------------------------------------------------- Assign Custom Role
1942:
1943: sub assigncustomrole {
1944: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1945: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1946: $end,$start);
1947: }
1948:
1949: # ----------------------------------------------------------------- Revoke Role
1950:
1951: sub revokerole {
1952: my ($udom,$uname,$url,$role)=@_;
1953: my $now=time;
1954: return &assignrole($udom,$uname,$url,$role,$now);
1955: }
1956:
1957: # ---------------------------------------------------------- Revoke Custom Role
1958:
1959: sub revokecustomrole {
1960: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1961: my $now=time;
1962: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1963: }
1964:
1965: # ------------------------------------------------------------ Directory lister
1966:
1967: sub dirlist {
1968: my $uri=shift;
1969: $uri=~s/^\///;
1970: $uri=~s/\/$//;
1971: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1972: if ($udom) {
1973: if ($uname) {
1974: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1975: homeserver($uname,$udom));
1976: return split(/:/,$listing);
1977: } else {
1978: my $tryserver;
1979: my %allusers=();
1980: foreach $tryserver (keys %libserv) {
1981: if ($hostdom{$tryserver} eq $udom) {
1982: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1983: $tryserver);
1984: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1985: && ($listing ne 'con_lost')) {
1986: map {
1987: my ($entry,@stat)=split(/&/,$_);
1988: $allusers{$entry}=1;
1989: } split(/:/,$listing);
1990: }
1991: }
1992: }
1993: my $alluserstr='';
1994: map {
1995: $alluserstr.=$_.'&user:';
1996: } sort keys %allusers;
1997: $alluserstr=~s/:$//;
1998: return split(/:/,$alluserstr);
1999: }
2000: } else {
2001: my $tryserver;
2002: my %alldom=();
2003: foreach $tryserver (keys %libserv) {
2004: $alldom{$hostdom{$tryserver}}=1;
2005: }
2006: my $alldomstr='';
2007: map {
2008: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2009: } sort keys %alldom;
2010: $alldomstr=~s/:$//;
2011: return split(/:/,$alldomstr);
2012: }
2013: }
2014:
2015: # -------------------------------------------------------- Value of a Condition
2016:
2017: sub directcondval {
2018: my $number=shift;
2019: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2020: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2021: } else {
2022: return 2;
2023: }
2024: }
2025:
2026: sub condval {
2027: my $condidx=shift;
2028: my $result=0;
2029: my $allpathcond='';
2030: map {
2031: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2032: $allpathcond.=
2033: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2034: }
2035: } split(/\|/,$condidx);
2036: $allpathcond=~s/\|$//;
2037: if ($ENV{'request.course.id'}) {
2038: if ($allpathcond) {
2039: my $operand='|';
2040: my @stack;
2041: map {
2042: if ($_ eq '(') {
2043: push @stack,($operand,$result)
2044: } elsif ($_ eq ')') {
2045: my $before=pop @stack;
2046: if (pop @stack eq '&') {
2047: $result=$result>$before?$before:$result;
2048: } else {
2049: $result=$result>$before?$result:$before;
2050: }
2051: } elsif (($_ eq '&') || ($_ eq '|')) {
2052: $operand=$_;
2053: } else {
2054: my $new=directcondval($_);
2055: if ($operand eq '&') {
2056: $result=$result>$new?$new:$result;
2057: } else {
2058: $result=$result>$new?$result:$new;
2059: }
2060: }
2061: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
2062: }
2063: }
2064: return $result;
2065: }
2066:
2067: # --------------------------------------------------------- Value of a Variable
2068:
2069: sub EXT {
2070: my ($varname,$symbparm)=@_;
2071: unless ($varname) { return ''; }
2072: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2073: my $rest;
2074: if ($therest[0]) {
2075: $rest=join('.',@therest);
2076: } else {
2077: $rest='';
2078: }
2079: my $qualifierrest=$qualifier;
2080: if ($rest) { $qualifierrest.='.'.$rest; }
2081: my $spacequalifierrest=$space;
2082: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2083: if ($realm eq 'user') {
2084: # --------------------------------------------------------------- user.resource
2085: if ($space eq 'resource') {
2086: my %restored=&restore();
2087: return $restored{$qualifierrest};
2088: # ----------------------------------------------------------------- user.access
2089: } elsif ($space eq 'access') {
2090: return &allowed($qualifier,$rest);
2091: # ------------------------------------------ user.preferences, user.environment
2092: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2093: return $ENV{join('.',('environment',$qualifierrest))};
2094: # ----------------------------------------------------------------- user.course
2095: } elsif ($space eq 'course') {
2096: return $ENV{join('.',('request.course',$qualifier))};
2097: # ------------------------------------------------------------------- user.role
2098: } elsif ($space eq 'role') {
2099: my ($role,$where)=split(/\./,$ENV{'request.role'});
2100: if ($qualifier eq 'value') {
2101: return $role;
2102: } elsif ($qualifier eq 'extent') {
2103: return $where;
2104: }
2105: # ----------------------------------------------------------------- user.domain
2106: } elsif ($space eq 'domain') {
2107: return $ENV{'user.domain'};
2108: # ------------------------------------------------------------------- user.name
2109: } elsif ($space eq 'name') {
2110: return $ENV{'user.name'};
2111: # ---------------------------------------------------- Any other user namespace
2112: } else {
2113: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2114: my %reply=&get($space,[$item]);
2115: return $reply{$item};
2116: }
2117: } elsif ($realm eq 'request') {
2118: # ------------------------------------------------------------- request.browser
2119: if ($space eq 'browser') {
2120: return $ENV{'browser.'.$qualifier};
2121: # ------------------------------------------------------------ request.filename
2122: } else {
2123: return $ENV{'request.'.$spacequalifierrest};
2124: }
2125: } elsif ($realm eq 'course') {
2126: # ---------------------------------------------------------- course.description
2127: return $ENV{'course.'.$ENV{'request.course.id'}.'.'.
2128: $spacequalifierrest};
2129: } elsif ($realm eq 'resource') {
2130: if ($ENV{'request.course.id'}) {
2131:
2132: # print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2133:
2134:
2135: # ----------------------------------------------------- Cascading lookup scheme
2136: my $symbp;
2137: if ($symbparm) {
2138: $symbp=$symbparm;
2139: } else {
2140: $symbp=&symbread();
2141: }
2142: my $mapp=(split(/\_\_\_/,$symbp))[0];
2143:
2144: my $symbparm=$symbp.'.'.$spacequalifierrest;
2145: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2146:
2147: my $seclevel=
2148: $ENV{'request.course.id'}.'.['.
2149: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
2150: my $seclevelr=
2151: $ENV{'request.course.id'}.'.['.
2152: $ENV{'request.course.sec'}.'].'.$symbparm;
2153: my $seclevelm=
2154: $ENV{'request.course.id'}.'.['.
2155: $ENV{'request.course.sec'}.'].'.$mapparm;
2156:
2157: my $courselevel=
2158: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
2159: my $courselevelr=
2160: $ENV{'request.course.id'}.'.'.$symbparm;
2161: my $courselevelm=
2162: $ENV{'request.course.id'}.'.'.$mapparm;
2163:
2164: # ----------------------------------------------------------- first, check user
2165: my %resourcedata=get('resourcedata',
2166: [$courselevelr,$courselevelm,$courselevel]);
2167: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2168: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2169:
2170: if ($resourcedata{$courselevelr}) {
2171: return $resourcedata{$courselevelr}; }
2172: if ($resourcedata{$courselevelm}) {
2173: return $resourcedata{$courselevelm}; }
2174: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
2175:
2176: } else {
2177: if ($resourcedata{$courselevelr}!~/No such file/) {
2178: &logthis("<font color=blue>WARNING:".
2179: " Trying to get resource data for ".$ENV{'user.name'}." at "
2180: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
2181: "</font>");
2182: }
2183: }
2184:
2185: # -------------------------------------------------------- second, check course
2186:
2187: my $reply=&reply('get:'.
2188: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
2189: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2190: ':resourcedata:'.
2191: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
2192: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
2193: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
2194: if ($reply!~/^error\:/) {
2195: map {
2196: if ($_) { return &unescape($_); }
2197: } split(/\&/,$reply);
2198: }
2199: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
2200: &logthis("<font color=blue>WARNING:".
2201: " Getting ".$reply." asking for ".$varname." for ".
2202: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2203: ' at '.
2204: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
2205: ' from '.
2206: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
2207: "</font>");
2208: }
2209: # ------------------------------------------------------ third, check map parms
2210: my %parmhash=();
2211: my $thisparm='';
2212: if (tie(%parmhash,'GDBM_File',
2213: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
2214: $thisparm=$parmhash{$symbparm};
2215: untie(%parmhash);
2216: }
2217: if ($thisparm) { return $thisparm; }
2218: }
2219:
2220: # --------------------------------------------- last, look in resource metadata
2221:
2222: $spacequalifierrest=~s/\./\_/;
2223: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2224: if ($metadata) { return $metadata; }
2225: $metadata=&metadata($ENV{'request.filename'},
2226: 'parameter_'.$spacequalifierrest);
2227: if ($metadata) { return $metadata; }
2228:
2229: # ------------------------------------------------------------------ Cascade up
2230:
2231: unless ($space eq '0') {
2232: my ($part,$id)=split(/\_/,$space);
2233: if ($id) {
2234: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2235: $symbparm);
2236: if ($partgeneral) { return $partgeneral; }
2237: } else {
2238: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2239: $symbparm);
2240: if ($resourcegeneral) { return $resourcegeneral; }
2241: }
2242: }
2243:
2244: # ---------------------------------------------------- Any other user namespace
2245: } elsif ($realm eq 'environment') {
2246: # ----------------------------------------------------------------- environment
2247: return $ENV{'environment.'.$spacequalifierrest};
2248: } elsif ($realm eq 'system') {
2249: # ----------------------------------------------------------------- system.time
2250: if ($space eq 'time') {
2251: return time;
2252: }
2253: }
2254: return '';
2255: }
2256:
2257: # ---------------------------------------------------------------- Get metadata
2258:
2259: sub metadata {
2260: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
2261:
2262: $uri=&declutter($uri);
2263: my $filename=$uri;
2264: $uri=~s/\.meta$//;
2265: #
2266: # Is the metadata already cached?
2267: # Look at timestamp of caching
2268: # Everything is cached by the main uri, libraries are never directly cached
2269: #
2270: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
2271: #
2272: # Is this a recursive call for a library?
2273: #
2274: if ($liburi) {
2275: $liburi=&declutter($liburi);
2276: $filename=$liburi;
2277: }
2278: my %metathesekeys=();
2279: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2280: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2281: my $parser=HTML::TokeParser->new(\$metastring);
2282: my $token;
2283: undef %metathesekeys;
2284: while ($token=$parser->get_token) {
2285: if ($token->[0] eq 'S') {
2286: if (defined($token->[2]->{'package'})) {
2287: #
2288: # This is a package - get package info
2289: #
2290: my $package=$token->[2]->{'package'};
2291: my $keyroot='';
2292: if ($prefix) {
2293: $keyroot.='_'.$prefix;
2294: } else {
2295: if (defined($token->[2]->{'part'})) {
2296: $keyroot.='_'.$token->[2]->{'part'};
2297: }
2298: }
2299: if (defined($token->[2]->{'id'})) {
2300: $keyroot.='_'.$token->[2]->{'id'};
2301: }
2302: if ($metacache{$uri.':packages'}) {
2303: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2304: } else {
2305: $metacache{$uri.':packages'}=$package.$keyroot;
2306: }
2307: map {
2308: if ($_=~/^$package\&/) {
2309: my ($pack,$name,$subp)=split(/\&/,$_);
2310: my $value=$packagetab{$_};
2311: my $part=$keyroot;
2312: $part=~s/^\_//;
2313: if ($subp eq 'display') {
2314: $value.=' [Part: '.$part.']';
2315: }
2316: my $unikey='parameter'.$keyroot.'_'.$name;
2317: $metathesekeys{$unikey}=1;
2318: $metacache{$uri.':'.$unikey.'.part'}=$part;
2319: unless
2320: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2321: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2322: }
2323: }
2324: } keys %packagetab;
2325: } else {
2326: #
2327: # This is not a package - some other kind of start tag
2328: #
2329: my $entry=$token->[1];
2330: my $unikey;
2331: if ($entry eq 'import') {
2332: $unikey='';
2333: } else {
2334: $unikey=$entry;
2335: }
2336: if ($prefix) {
2337: $unikey.=$prefix;
2338: } else {
2339: if (defined($token->[2]->{'part'})) {
2340: $unikey.='_'.$token->[2]->{'part'};
2341: }
2342: }
2343: if (defined($token->[2]->{'id'})) {
2344: $unikey.='_'.$token->[2]->{'id'};
2345: }
2346:
2347: if ($entry eq 'import') {
2348: #
2349: # Importing a library here
2350: #
2351: if (defined($depthcount)) { $depthcount++; } else
2352: { $depthcount=0; }
2353: if ($depthcount<20) {
2354: map {
2355: $metathesekeys{$_}=1;
2356: } split(/\,/,&metadata($uri,'keys',
2357: $parser->get_text('/import'),$unikey,
2358: $depthcount));
2359: }
2360: } else {
2361:
2362: if (defined($token->[2]->{'name'})) {
2363: $unikey.='_'.$token->[2]->{'name'};
2364: }
2365: $metathesekeys{$unikey}=1;
2366: map {
2367: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2368: } @{$token->[3]};
2369: unless (
2370: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
2371: ) { $metacache{$uri.':'.$unikey}=
2372: $metacache{$uri.':'.$unikey.'.default'};
2373: }
2374: # end of not-a-package not-a-library import
2375: }
2376: # end of not-a-package start tag
2377: }
2378: # the next is the end of "start tag"
2379: }
2380: }
2381: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2382: $metacache{$uri.':cachedtimestamp'}=time;
2383: # this is the end of "was not already recently cached
2384: }
2385: return $metacache{$uri.':'.$what};
2386: }
2387:
2388: # ------------------------------------------------- Update symbolic store links
2389:
2390: sub symblist {
2391: my ($mapname,%newhash)=@_;
2392: $mapname=declutter($mapname);
2393: my %hash;
2394: if (($ENV{'request.course.fn'}) && (%newhash)) {
2395: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2396: &GDBM_WRCREAT,0640)) {
2397: map {
2398: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2399: } keys %newhash;
2400: if (untie(%hash)) {
2401: return 'ok';
2402: }
2403: }
2404: }
2405: return 'error';
2406: }
2407:
2408: # ------------------------------------------------------ Return symb list entry
2409:
2410: sub symbread {
2411: my $thisfn=shift;
2412: unless ($thisfn) {
2413: if ($ENV{'request.symb'}) { return $ENV{'request.symb'}; }
2414: $thisfn=$ENV{'request.filename'};
2415: }
2416: $thisfn=declutter($thisfn);
2417: my %hash;
2418: my %bighash;
2419: my $syval='';
2420: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2421: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2422: &GDBM_READER,0640)) {
2423: $syval=$hash{$thisfn};
2424: untie(%hash);
2425: }
2426: # ---------------------------------------------------------- There was an entry
2427: if ($syval) {
2428: unless ($syval=~/\_\d+$/) {
2429: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2430: &appenv('request.ambiguous' => $thisfn);
2431: return '';
2432: }
2433: $syval.=$1;
2434: }
2435: } else {
2436: # ------------------------------------------------------- Was not in symb table
2437: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2438: &GDBM_READER,0640)) {
2439: # ---------------------------------------------- Get ID(s) for current resource
2440: my $ids=$bighash{'ids_/res/'.$thisfn};
2441: unless ($ids) {
2442: $ids=$bighash{'ids_/'.$thisfn};
2443: }
2444: if ($ids) {
2445: # ------------------------------------------------------------------- Has ID(s)
2446: my @possibilities=split(/\,/,$ids);
2447: if ($#possibilities==0) {
2448: # ----------------------------------------------- There is only one possibility
2449: my ($mapid,$resid)=split(/\./,$ids);
2450: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2451: } else {
2452: # ------------------------------------------ There is more than one possibility
2453: my $realpossible=0;
2454: map {
2455: my $file=$bighash{'src_'.$_};
2456: if (&allowed('bre',$file)) {
2457: my ($mapid,$resid)=split(/\./,$_);
2458: if ($bighash{'map_type_'.$mapid} ne 'page') {
2459: $realpossible++;
2460: $syval=declutter($bighash{'map_id_'.$mapid}).
2461: '___'.$resid;
2462: }
2463: }
2464: } @possibilities;
2465: if ($realpossible!=1) { $syval=''; }
2466: }
2467: }
2468: untie(%bighash)
2469: }
2470: }
2471: if ($syval) {
2472: return $syval.'___'.$thisfn;
2473: }
2474: }
2475: &appenv('request.ambiguous' => $thisfn);
2476: return '';
2477: }
2478:
2479: # ---------------------------------------------------------- Return random seed
2480:
2481: sub numval {
2482: my $txt=shift;
2483: $txt=~tr/A-J/0-9/;
2484: $txt=~tr/a-j/0-9/;
2485: $txt=~tr/K-T/0-9/;
2486: $txt=~tr/k-t/0-9/;
2487: $txt=~tr/U-Z/0-5/;
2488: $txt=~tr/u-z/0-5/;
2489: $txt=~s/\D//g;
2490: return int($txt);
2491: }
2492:
2493: sub rndseed {
2494: my ($symb,$courseid,$domain,$username)=@_;
2495: if (!$symb) {
2496: unless ($symb=&symbread()) { return time; }
2497: }
2498: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2499: if (!$domain) {$domain=$ENV{'user.domain'};}
2500: if (!$username) {$username=$ENV{'user.name'};}
2501: {
2502: use integer;
2503: my $symbchck=unpack("%32C*",$symb) << 27;
2504: my $symbseed=numval($symb) << 22;
2505: my $namechck=unpack("%32C*",$username) << 17;
2506: my $nameseed=numval($username) << 12;
2507: my $domainseed=unpack("%32C*",$domain) << 7;
2508: my $courseseed=unpack("%32C*",$courseid);
2509: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2510: #uncommenting these lines can break things!
2511: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2512: #&Apache::lonxml::debug("rndseed :$num:$symb");
2513: return $num;
2514: }
2515: }
2516:
2517: sub ireceipt {
2518: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2519: my $cuname=unpack("%32C*",$funame);
2520: my $cudom=unpack("%32C*",$fudom);
2521: my $cucourseid=unpack("%32C*",$fucourseid);
2522: my $cusymb=unpack("%32C*",$fusymb);
2523: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2524: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2525: ($cunique%$cuname+
2526: $cunique%$cudom+
2527: $cusymb%$cuname+
2528: $cusymb%$cudom+
2529: $cucourseid%$cuname+
2530: $cucourseid%$cudom);
2531: }
2532:
2533: sub receipt {
2534: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2535: $ENV{'request.course.id'},&symbread());
2536: }
2537:
2538: # ------------------------------------------------------------ Serves up a file
2539: # returns either the contents of the file or a -1
2540: sub getfile {
2541: my $file=shift;
2542: &repcopy($file);
2543: if (! -e $file ) { return -1; };
2544: my $fh=Apache::File->new($file);
2545: my $a='';
2546: while (<$fh>) { $a .=$_; }
2547: return $a
2548: }
2549:
2550: sub filelocation {
2551: my ($dir,$file) = @_;
2552: my $location;
2553: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2554: if ($file=~m:^/~:) { # is a contruction space reference
2555: $location = $file;
2556: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2557: } else {
2558: $file=~s/^$perlvar{'lonDocRoot'}//;
2559: $file=~s:^/*res::;
2560: if ( !( $file =~ m:^/:) ) {
2561: $location = $dir. '/'.$file;
2562: } else {
2563: $location = '/home/httpd/html/res'.$file;
2564: }
2565: }
2566: $location=~s://+:/:g; # remove duplicate /
2567: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2568: return $location;
2569: }
2570:
2571: sub hreflocation {
2572: my ($dir,$file)=@_;
2573: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
2574: my $finalpath=filelocation($dir,$file);
2575: $finalpath=~s/^\/home\/httpd\/html//;
2576: return $finalpath;
2577: } else {
2578: return $file;
2579: }
2580: }
2581:
2582: # ------------------------------------------------------------- Declutters URLs
2583:
2584: sub declutter {
2585: my $thisfn=shift;
2586: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2587: $thisfn=~s/^\///;
2588: $thisfn=~s/^res\///;
2589: return $thisfn;
2590: }
2591:
2592: # -------------------------------------------------------- Escape Special Chars
2593:
2594: sub escape {
2595: my $str=shift;
2596: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2597: return $str;
2598: }
2599:
2600: # ----------------------------------------------------- Un-Escape Special Chars
2601:
2602: sub unescape {
2603: my $str=shift;
2604: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2605: return $str;
2606: }
2607:
2608: # ================================================================ Main Program
2609:
2610: BEGIN {
2611: # ------------------------------------------------------------ Read access.conf
2612: {
2613: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2614:
2615: while (my $configline=<$config>) {
2616: if ($configline =~ /PerlSetVar/) {
2617: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2618: chomp($varvalue);
2619: $perlvar{$varname}=$varvalue;
2620: }
2621: }
2622: }
2623:
2624: # ------------------------------------------------------------- Read hosts file
2625: {
2626: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2627:
2628: while (my $configline=<$config>) {
2629: chomp($configline);
2630: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2631: $hostname{$id}=$name;
2632: $hostdom{$id}=$domain;
2633: $hostip{$id}=$ip;
2634: if ($role eq 'library') { $libserv{$id}=$name; }
2635: }
2636: }
2637:
2638: # ------------------------------------------------------ Read spare server file
2639: {
2640: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2641:
2642: while (my $configline=<$config>) {
2643: chomp($configline);
2644: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2645: $spareid{$configline}=1;
2646: }
2647: }
2648: }
2649: # ------------------------------------------------------------ Read permissions
2650: {
2651: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2652:
2653: while (my $configline=<$config>) {
2654: chomp($configline);
2655: if ($configline) {
2656: my ($role,$perm)=split(/ /,$configline);
2657: if ($perm ne '') { $pr{$role}=$perm; }
2658: }
2659: }
2660: }
2661:
2662: # -------------------------------------------- Read plain texts for permissions
2663: {
2664: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2665:
2666: while (my $configline=<$config>) {
2667: chomp($configline);
2668: if ($configline) {
2669: my ($short,$plain)=split(/:/,$configline);
2670: if ($plain ne '') { $prp{$short}=$plain; }
2671: }
2672: }
2673: }
2674:
2675: # ---------------------------------------------------------- Read package table
2676: {
2677: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
2678:
2679: while (my $configline=<$config>) {
2680: chomp($configline);
2681: my ($short,$plain)=split(/:/,$configline);
2682: my ($pack,$name)=split(/\&/,$short);
2683: if ($plain ne '') {
2684: $packagetab{$pack.'&'.$name.'&name'}=$name;
2685: $packagetab{$short}=$plain;
2686: }
2687: }
2688: }
2689:
2690: # ------------------------------------------------------------- Read file types
2691: {
2692: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2693:
2694: while (my $configline=<$config>) {
2695: next if (/^\#/);
2696: chomp($configline);
2697: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2698: if ($descr[0] ne '') {
2699: $fe{$ending}=lc($emb);
2700: $fd{$ending}=join(' ',@descr);
2701: }
2702: }
2703: }
2704:
2705: %metacache=();
2706:
2707: $readit='done';
2708: &logtouch();
2709: &logthis('<font color=yellow>INFO: Read configuration</font>');
2710: }
2711:
2712: 1;
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