1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.190 2001/12/12 23:34:14 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: # 12/6,12/7,12/12 Gerd Kortemeyer
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
174: %libserv %pr %prp %fe %fd %metacache %packagetab
175: %courselogs %accesshash $processmarker $dumpcount
176: %coursedombuf %coursehombuf);
177: use IO::Socket;
178: use GDBM_File;
179: use Apache::Constants qw(:common :http);
180: use HTML::TokeParser;
181: use Fcntl qw(:flock);
182:
183: # --------------------------------------------------------------------- Logging
184:
185: sub logtouch {
186: my $execdir=$perlvar{'lonDaemons'};
187: unless (-e "$execdir/logs/lonnet.log") {
188: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
189: close $fh;
190: }
191: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
192: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
193: }
194:
195: sub logthis {
196: my $message=shift;
197: my $execdir=$perlvar{'lonDaemons'};
198: my $now=time;
199: my $local=localtime($now);
200: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
201: print $fh "$local ($$): $message\n";
202: return 1;
203: }
204:
205: sub logperm {
206: my $message=shift;
207: my $execdir=$perlvar{'lonDaemons'};
208: my $now=time;
209: my $local=localtime($now);
210: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
211: print $fh "$now:$message:$local\n";
212: return 1;
213: }
214:
215: # -------------------------------------------------- Non-critical communication
216: sub subreply {
217: my ($cmd,$server)=@_;
218: my $peerfile="$perlvar{'lonSockDir'}/$server";
219: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
220: Type => SOCK_STREAM,
221: Timeout => 10)
222: or return "con_lost";
223: print $client "$cmd\n";
224: my $answer=<$client>;
225: if (!$answer) { $answer="con_lost"; }
226: chomp($answer);
227: return $answer;
228: }
229:
230: sub reply {
231: my ($cmd,$server)=@_;
232: my $answer=subreply($cmd,$server);
233: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
234: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
235: &logthis("<font color=blue>WARNING:".
236: " $cmd to $server returned $answer</font>");
237: }
238: return $answer;
239: }
240:
241: # ----------------------------------------------------------- Send USR1 to lonc
242:
243: sub reconlonc {
244: my $peerfile=shift;
245: &logthis("Trying to reconnect for $peerfile");
246: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
247: if (my $fh=Apache::File->new("$loncfile")) {
248: my $loncpid=<$fh>;
249: chomp($loncpid);
250: if (kill 0 => $loncpid) {
251: &logthis("lonc at pid $loncpid responding, sending USR1");
252: kill USR1 => $loncpid;
253: sleep 1;
254: if (-e "$peerfile") { return; }
255: &logthis("$peerfile still not there, give it another try");
256: sleep 5;
257: if (-e "$peerfile") { return; }
258: &logthis(
259: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
260: } else {
261: &logthis(
262: "<font color=blue>WARNING:".
263: " lonc at pid $loncpid not responding, giving up</font>");
264: }
265: } else {
266: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
267: }
268: }
269:
270: # ------------------------------------------------------ Critical communication
271:
272: sub critical {
273: my ($cmd,$server)=@_;
274: unless ($hostname{$server}) {
275: &logthis("<font color=blue>WARNING:".
276: " Critical message to unknown server ($server)</font>");
277: return 'no_such_host';
278: }
279: my $answer=reply($cmd,$server);
280: if ($answer eq 'con_lost') {
281: my $pingreply=reply('ping',$server);
282: &reconlonc("$perlvar{'lonSockDir'}/$server");
283: my $pongreply=reply('pong',$server);
284: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
285: $answer=reply($cmd,$server);
286: if ($answer eq 'con_lost') {
287: my $now=time;
288: my $middlename=$cmd;
289: $middlename=substr($middlename,0,16);
290: $middlename=~s/\W//g;
291: my $dfilename=
292: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
293: {
294: my $dfh;
295: if ($dfh=Apache::File->new(">$dfilename")) {
296: print $dfh "$cmd\n";
297: }
298: }
299: sleep 2;
300: my $wcmd='';
301: {
302: my $dfh;
303: if ($dfh=Apache::File->new("$dfilename")) {
304: $wcmd=<$dfh>;
305: }
306: }
307: chomp($wcmd);
308: if ($wcmd eq $cmd) {
309: &logthis("<font color=blue>WARNING: ".
310: "Connection buffer $dfilename: $cmd</font>");
311: &logperm("D:$server:$cmd");
312: return 'con_delayed';
313: } else {
314: &logthis("<font color=red>CRITICAL:"
315: ." Critical connection failed: $server $cmd</font>");
316: &logperm("F:$server:$cmd");
317: return 'con_failed';
318: }
319: }
320: }
321: return $answer;
322: }
323:
324: # ---------------------------------------------------------- Append Environment
325:
326: sub appenv {
327: my %newenv=@_;
328: map {
329: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
330: &logthis("<font color=blue>WARNING: ".
331: "Attempt to modify environment ".$_." to ".$newenv{$_}
332: .'</font>');
333: delete($newenv{$_});
334: } else {
335: $ENV{$_}=$newenv{$_};
336: }
337: } keys %newenv;
338:
339: my $lockfh;
340: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
341: return 'error: '.$!;
342: }
343: unless (flock($lockfh,LOCK_EX)) {
344: &logthis("<font color=blue>WARNING: ".
345: 'Could not obtain exclusive lock in appenv: '.$!);
346: $lockfh->close();
347: return 'error: '.$!;
348: }
349:
350: my @oldenv;
351: {
352: my $fh;
353: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
354: return 'error: '.$!;
355: }
356: @oldenv=<$fh>;
357: $fh->close();
358: }
359: for (my $i=0; $i<=$#oldenv; $i++) {
360: chomp($oldenv[$i]);
361: if ($oldenv[$i] ne '') {
362: my ($name,$value)=split(/=/,$oldenv[$i]);
363: unless (defined($newenv{$name})) {
364: $newenv{$name}=$value;
365: }
366: }
367: }
368: {
369: my $fh;
370: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
371: return 'error';
372: }
373: my $newname;
374: foreach $newname (keys %newenv) {
375: print $fh "$newname=$newenv{$newname}\n";
376: }
377: $fh->close();
378: }
379:
380: $lockfh->close();
381: return 'ok';
382: }
383: # ----------------------------------------------------- Delete from Environment
384:
385: sub delenv {
386: my $delthis=shift;
387: my %newenv=();
388: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
389: &logthis("<font color=blue>WARNING: ".
390: "Attempt to delete from environment ".$delthis);
391: return 'error';
392: }
393: my @oldenv;
394: {
395: my $fh;
396: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
397: return 'error';
398: }
399: unless (flock($fh,LOCK_SH)) {
400: &logthis("<font color=blue>WARNING: ".
401: 'Could not obtain shared lock in delenv: '.$!);
402: $fh->close();
403: return 'error: '.$!;
404: }
405: @oldenv=<$fh>;
406: $fh->close();
407: }
408: {
409: my $fh;
410: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
411: return 'error';
412: }
413: unless (flock($fh,LOCK_EX)) {
414: &logthis("<font color=blue>WARNING: ".
415: 'Could not obtain exclusive lock in delenv: '.$!);
416: $fh->close();
417: return 'error: '.$!;
418: }
419: map {
420: unless ($_=~/^$delthis/) { print $fh $_; }
421: } @oldenv;
422: $fh->close();
423: }
424: return 'ok';
425: }
426:
427: # ------------------------------ Find server with least workload from spare.tab
428:
429: sub spareserver {
430: my $tryserver;
431: my $spareserver='';
432: my $lowestserver=100;
433: foreach $tryserver (keys %spareid) {
434: my $answer=reply('load',$tryserver);
435: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
436: $spareserver="http://$hostname{$tryserver}";
437: $lowestserver=$answer;
438: }
439: }
440: return $spareserver;
441: }
442:
443: # ----------------------- Try to determine user's current authentication scheme
444:
445: sub queryauthenticate {
446: my ($uname,$udom)=@_;
447: if (($perlvar{'lonRole'} eq 'library') &&
448: ($udom eq $perlvar{'lonDefDomain'})) {
449: my $answer=reply("encrypt:currentauth:$udom:$uname",
450: $perlvar{'lonHostID'});
451: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
452: if (length($answer)) {
453: return $answer;
454: }
455: else {
456: &logthis("User $uname at $udom lacks an authentication mechanism");
457: return 'no_host';
458: }
459: }
460: }
461:
462: my $tryserver;
463: foreach $tryserver (keys %libserv) {
464: if ($hostdom{$tryserver} eq $udom) {
465: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
466: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
467: if (length($answer)) {
468: return $answer;
469: }
470: else {
471: &logthis("User $uname at $udom lacks an authentication mechanism");
472: return 'no_host';
473: }
474: }
475: }
476: }
477: &logthis("User $uname at $udom lacks an authentication mechanism");
478: return 'no_host';
479: }
480:
481: # --------- Try to authenticate user from domain's lib servers (first this one)
482:
483: sub authenticate {
484: my ($uname,$upass,$udom)=@_;
485: $upass=escape($upass);
486: if (($perlvar{'lonRole'} eq 'library') &&
487: ($udom eq $perlvar{'lonDefDomain'})) {
488: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
489: if ($answer =~ /authorized/) {
490: if ($answer eq 'authorized') {
491: &logthis("User $uname at $udom authorized by local server");
492: return $perlvar{'lonHostID'};
493: }
494: if ($answer eq 'non_authorized') {
495: &logthis("User $uname at $udom rejected by local server");
496: return 'no_host';
497: }
498: }
499: }
500:
501: my $tryserver;
502: foreach $tryserver (keys %libserv) {
503: if ($hostdom{$tryserver} eq $udom) {
504: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
505: if ($answer =~ /authorized/) {
506: if ($answer eq 'authorized') {
507: &logthis("User $uname at $udom authorized by $tryserver");
508: return $tryserver;
509: }
510: if ($answer eq 'non_authorized') {
511: &logthis("User $uname at $udom rejected by $tryserver");
512: return 'no_host';
513: }
514: }
515: }
516: }
517: &logthis("User $uname at $udom could not be authenticated");
518: return 'no_host';
519: }
520:
521: # ---------------------- Find the homebase for a user from domain's lib servers
522:
523: sub homeserver {
524: my ($uname,$udom)=@_;
525:
526: my $index="$uname:$udom";
527: if ($homecache{$index}) { return "$homecache{$index}"; }
528:
529: my $tryserver;
530: foreach $tryserver (keys %libserv) {
531: if ($hostdom{$tryserver} eq $udom) {
532: my $answer=reply("home:$udom:$uname",$tryserver);
533: if ($answer eq 'found') {
534: $homecache{$index}=$tryserver;
535: return $tryserver;
536: }
537: }
538: }
539: return 'no_host';
540: }
541:
542: # ------------------------------------- Find the usernames behind a list of IDs
543:
544: sub idget {
545: my ($udom,@ids)=@_;
546: my %returnhash=();
547:
548: my $tryserver;
549: foreach $tryserver (keys %libserv) {
550: if ($hostdom{$tryserver} eq $udom) {
551: my $idlist=join('&',@ids);
552: $idlist=~tr/A-Z/a-z/;
553: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
554: my @answer=();
555: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
556: @answer=split(/\&/,$reply);
557: } ;
558: my $i;
559: for ($i=0;$i<=$#ids;$i++) {
560: if ($answer[$i]) {
561: $returnhash{$ids[$i]}=$answer[$i];
562: }
563: }
564: }
565: }
566: return %returnhash;
567: }
568:
569: # ------------------------------------- Find the IDs behind a list of usernames
570:
571: sub idrget {
572: my ($udom,@unames)=@_;
573: my %returnhash=();
574: map {
575: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
576: } @unames;
577: return %returnhash;
578: }
579:
580: # ------------------------------- Store away a list of names and associated IDs
581:
582: sub idput {
583: my ($udom,%ids)=@_;
584: my %servers=();
585: map {
586: my $uhom=&homeserver($_,$udom);
587: if ($uhom ne 'no_host') {
588: my $id=&escape($ids{$_});
589: $id=~tr/A-Z/a-z/;
590: my $unam=&escape($_);
591: if ($servers{$uhom}) {
592: $servers{$uhom}.='&'.$id.'='.$unam;
593: } else {
594: $servers{$uhom}=$id.'='.$unam;
595: }
596: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
597: }
598: } keys %ids;
599: map {
600: &critical('idput:'.$udom.':'.$servers{$_},$_);
601: } keys %servers;
602: }
603:
604: # ------------------------------------- Find the section of student in a course
605:
606: sub usection {
607: my ($udom,$unam,$courseid)=@_;
608: $courseid=~s/\_/\//g;
609: $courseid=~s/^(\w)/\/$1/;
610: map {
611: my ($key,$value)=split(/\=/,$_);
612: $key=&unescape($key);
613: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
614: my $section=$1;
615: if ($key eq $courseid.'_st') { $section=''; }
616: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
617: my $now=time;
618: my $notactive=0;
619: if ($start) {
620: if ($now<$start) { $notactive=1; }
621: }
622: if ($end) {
623: if ($now>$end) { $notactive=1; }
624: }
625: unless ($notactive) { return $section; }
626: }
627: } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
628: &homeserver($unam,$udom)));
629: return '-1';
630: }
631:
632: # ------------------------------------- Read an entry from a user's environment
633:
634: sub userenvironment {
635: my ($udom,$unam,@what)=@_;
636: my %returnhash=();
637: my @answer=split(/\&/,
638: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
639: &homeserver($unam,$udom)));
640: my $i;
641: for ($i=0;$i<=$#what;$i++) {
642: $returnhash{$what[$i]}=&unescape($answer[$i]);
643: }
644: return %returnhash;
645: }
646:
647: # ----------------------------- Subscribe to a resource, return URL if possible
648:
649: sub subscribe {
650: my $fname=shift;
651: my $author=$fname;
652: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
653: my ($udom,$uname)=split(/\//,$author);
654: my $home=homeserver($uname,$udom);
655: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
656: return 'not_found';
657: }
658: my $answer=reply("sub:$fname",$home);
659: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
660: $answer.=' by '.$home;
661: }
662: return $answer;
663: }
664:
665: # -------------------------------------------------------------- Replicate file
666:
667: sub repcopy {
668: my $filename=shift;
669: $filename=~s/\/+/\//g;
670: my $transname="$filename.in.transfer";
671: if ((-e $filename) || (-e $transname)) { return OK; }
672: my $remoteurl=subscribe($filename);
673: if ($remoteurl =~ /^con_lost by/) {
674: &logthis("Subscribe returned $remoteurl: $filename");
675: return HTTP_SERVICE_UNAVAILABLE;
676: } elsif ($remoteurl eq 'not_found') {
677: &logthis("Subscribe returned not_found: $filename");
678: return HTTP_NOT_FOUND;
679: } elsif ($remoteurl =~ /^rejected by/) {
680: &logthis("Subscribe returned $remoteurl: $filename");
681: return FORBIDDEN;
682: } elsif ($remoteurl eq 'directory') {
683: return OK;
684: } else {
685: my @parts=split(/\//,$filename);
686: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
687: if ($path ne "$perlvar{'lonDocRoot'}/res") {
688: &logthis("Malconfiguration for replication: $filename");
689: return HTTP_BAD_REQUEST;
690: }
691: my $count;
692: for ($count=5;$count<$#parts;$count++) {
693: $path.="/$parts[$count]";
694: if ((-e $path)!=1) {
695: mkdir($path,0777);
696: }
697: }
698: my $ua=new LWP::UserAgent;
699: my $request=new HTTP::Request('GET',"$remoteurl");
700: my $response=$ua->request($request,$transname);
701: if ($response->is_error()) {
702: unlink($transname);
703: my $message=$response->status_line;
704: &logthis("<font color=blue>WARNING:"
705: ." LWP get: $message: $filename</font>");
706: return HTTP_SERVICE_UNAVAILABLE;
707: } else {
708: if ($remoteurl!~/\.meta$/) {
709: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
710: my $mresponse=$ua->request($mrequest,$filename.'.meta');
711: if ($mresponse->is_error()) {
712: unlink($filename.'.meta');
713: &logthis(
714: "<font color=yellow>INFO: No metadata: $filename</font>");
715: }
716: }
717: rename($transname,$filename);
718: return OK;
719: }
720: }
721: }
722:
723: # --------------------------------------------------------- Server Side Include
724:
725: sub ssi {
726:
727: my ($fn,%form)=@_;
728:
729: my $ua=new LWP::UserAgent;
730:
731: my $request;
732:
733: if (%form) {
734: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
735: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
736: } else {
737: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
738: }
739:
740: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
741: my $response=$ua->request($request);
742:
743: return $response->content;
744: }
745:
746: # ------------------------------------------------------------------------- Log
747:
748: sub log {
749: my ($dom,$nam,$hom,$what)=@_;
750: return critical("log:$dom:$nam:$what",$hom);
751: }
752:
753: # ------------------------------------------------------------------ Course Log
754:
755: sub flushcourselogs {
756: &logthis('Flushing course log buffers');
757: map {
758: my $crsid=$_;
759: if (&reply('log:'.$coursedombuf{$crsid}.':'.
760: &escape($courselogs{$crsid}),
761: $coursehombuf{$crsid}) 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: &logthis('Flushing access logs');
773: map {
774: my $entry=$_;
775: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
776: my %temphash=($entry => $accesshash{$entry});
777: if (&Apache::lonnet::put('resevaldata',\%temphash,$1,$2) eq 'ok') {
778: delete $accesshash{$entry};
779: }
780: } keys %accesshash;
781: $dumpcount++;
782: }
783:
784: sub courselog {
785: my $what=shift;
786: $what=time.':'.$what;
787: unless ($ENV{'request.course.id'}) { return ''; }
788: $coursedombuf{$ENV{'request.course.id'}}=
789: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
790: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
791: $coursehombuf{$ENV{'request.course.id'}}=
792: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
793: if (defined $courselogs{$ENV{'request.course.id'}}) {
794: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
795: } else {
796: $courselogs{$ENV{'request.course.id'}}.=$what;
797: }
798: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
799: &flushcourselogs();
800: }
801: }
802:
803: sub courseacclog {
804: my $fnsymb=shift;
805: unless ($ENV{'request.course.id'}) { return ''; }
806: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
807: if ($what=~/(problem|exam|quiz|assess|survey|form)$/) {
808: $what.=':POST';
809: map {
810: if ($_=~/^form\.(.*)/) {
811: $what.=':'.$1.'='.$ENV{$_};
812: }
813: } keys %ENV;
814: }
815: &courselog($what);
816: }
817:
818: sub countacc {
819: my $url=&declutter(shift);
820: unless ($ENV{'request.course.id'}) { return ''; }
821: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
822: my $key=$processmarker.'_'.$dumpcount.'___'.$url.'___count';
823: if (defined($accesshash{$key})) {
824: $accesshash{$key}++;
825: } else {
826: $accesshash{$key}=1;
827: }
828: }
829:
830: # ----------------------------------------------------------- Check out an item
831:
832: sub checkout {
833: my ($symb,$tuname,$tudom,$tcrsid)=@_;
834: my $now=time;
835: my $lonhost=$perlvar{'lonHostID'};
836: my $infostr=&escape(
837: $tuname.'&'.
838: $tudom.'&'.
839: $tcrsid.'&'.
840: $symb.'&'.
841: $now.'&'.$ENV{'REMOTE_ADDR'});
842: my $token=&reply('tmpput:'.$infostr,$lonhost);
843: if ($token=~/^error\:/) {
844: &logthis("<font color=blue>WARNING: ".
845: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
846: "</font>");
847: return '';
848: }
849:
850: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
851: $token=~tr/a-z/A-Z/;
852:
853: my %infohash=('resource.0.outtoken' => $token,
854: 'resource.0.checkouttime' => $now,
855: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
856:
857: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
858: return '';
859: } else {
860: &logthis("<font color=blue>WARNING: ".
861: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
862: "</font>");
863: }
864:
865: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
866: &escape('Checkout '.$infostr.' - '.
867: $token)) ne 'ok') {
868: return '';
869: } else {
870: &logthis("<font color=blue>WARNING: ".
871: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
872: "</font>");
873: }
874: return $token;
875: }
876:
877: # ------------------------------------------------------------ Check in an item
878:
879: sub checkin {
880: my $token=shift;
881: my $now=time;
882: my ($ta,$tb,$lonhost)=split(/\*/,$token);
883: $lonhost=~tr/A-Z/a-z/;
884: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
885: $dtoken=~s/\W/\_/g;
886: my ($tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
887: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
888:
889: unless (($tuname) && ($tudom)) {
890: &logthis('Check in '.$token.' ('.$dtoken.') failed');
891: return '';
892: }
893:
894: unless (&allowed('mgr',$tcrsid)) {
895: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
896: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
897: return '';
898: }
899:
900: my %infohash=('resource.0.intoken' => $token,
901: 'resource.0.checkintime' => $now,
902: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
903:
904: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
905: return '';
906: }
907:
908: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
909: &escape('Checkin - '.$token)) ne 'ok') {
910: return '';
911: }
912:
913: return ($symb,$tuname,$tudom,$tcrsid);
914: }
915:
916: # --------------------------------------------- Set Expire Date for Spreadsheet
917:
918: sub expirespread {
919: my ($uname,$udom,$stype,$usymb)=@_;
920: my $cid=$ENV{'request.course.id'};
921: if ($cid) {
922: my $now=time;
923: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
924: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
925: $ENV{'course.'.$cid.'.num'}.
926: ':nohist_expirationdates:'.
927: &escape($key).'='.$now,
928: $ENV{'course.'.$cid.'.home'})
929: }
930: return 'ok';
931: }
932:
933: # ----------------------------------------------------- Devalidate Spreadsheets
934:
935: sub devalidate {
936: my $symb=shift;
937: my $cid=$ENV{'request.course.id'};
938: if ($cid) {
939: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
940: my $status=
941: &del('nohist_calculatedsheet',
942: [$key.'studentcalc'],
943: $ENV{'course.'.$cid.'.domain'},
944: $ENV{'course.'.$cid.'.num'})
945: .' '.
946: &del('nohist_calculatedsheets_'.$cid,
947: [$key.'assesscalc:'.$symb]);
948: unless ($status eq 'ok ok') {
949: &logthis('Could not devalidate spreadsheet '.
950: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
951: $symb.': '.$status);
952: }
953: }
954: }
955:
956: sub hash2str {
957: my (%hash)=@_;
958: my $result='';
959: map { $result.=escape($_).'='.escape($hash{$_}).'&'; } keys %hash;
960: $result=~s/\&$//;
961: return $result;
962: }
963:
964: sub str2hash {
965: my ($string) = @_;
966: my %returnhash;
967: map {
968: my ($name,$value)=split(/\=/,$_);
969: $returnhash{&unescape($name)}=&unescape($value);
970: } split(/\&/,$string);
971: return %returnhash;
972: }
973:
974: # -------------------------------------------------------------------Temp Store
975:
976: sub tmpreset {
977: my ($symb,$namespace,$domain,$stuname) = @_;
978: if (!$symb) {
979: $symb=&symbread();
980: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
981: }
982: $symb=escape($symb);
983:
984: if (!$namespace) { $namespace=$ENV{'request.state'}; }
985: $namespace=~s/\//\_/g;
986: $namespace=~s/\W//g;
987:
988: #FIXME needs to do something for /pub resources
989: if (!$domain) { $domain=$ENV{'user.domain'}; }
990: if (!$stuname) { $stuname=$ENV{'user.name'}; }
991: my $path=$perlvar{'lonDaemons'}.'/tmp';
992: my %hash;
993: if (tie(%hash,'GDBM_File',
994: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
995: &GDBM_WRCREAT,0640)) {
996: foreach my $key (keys %hash) {
997: if ($key=~ /:$symb/) {
998: delete($hash{$key});
999: }
1000: }
1001: }
1002: }
1003:
1004: sub tmpstore {
1005: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1006:
1007: if (!$symb) {
1008: $symb=&symbread();
1009: if (!$symb) { $symb= $ENV{'request.url'}; }
1010: }
1011: $symb=escape($symb);
1012:
1013: if (!$namespace) {
1014: # I don't think we would ever want to store this for a course.
1015: # it seems this will only be used if we don't have a course.
1016: #$namespace=$ENV{'request.course.id'};
1017: #if (!$namespace) {
1018: $namespace=$ENV{'request.state'};
1019: #}
1020: }
1021: $namespace=~s/\//\_/g;
1022: $namespace=~s/\W//g;
1023: #FIXME needs to do something for /pub resources
1024: if (!$domain) { $domain=$ENV{'user.domain'}; }
1025: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1026: my $now=time;
1027: my %hash;
1028: my $path=$perlvar{'lonDaemons'}.'/tmp';
1029: if (tie(%hash,'GDBM_File',
1030: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1031: &GDBM_WRCREAT,0640)) {
1032: $hash{"version:$symb"}++;
1033: my $version=$hash{"version:$symb"};
1034: my $allkeys='';
1035: foreach my $key (keys(%$storehash)) {
1036: $allkeys.=$key.':';
1037: $hash{"$version:$symb:$key"}=$$storehash{$key};
1038: }
1039: $hash{"$version:$symb:timestamp"}=$now;
1040: $allkeys.='timestamp';
1041: $hash{"$version:keys:$symb"}=$allkeys;
1042: if (untie(%hash)) {
1043: return 'ok';
1044: } else {
1045: return "error:$!";
1046: }
1047: } else {
1048: return "error:$!";
1049: }
1050: }
1051:
1052: # -----------------------------------------------------------------Temp Restore
1053:
1054: sub tmprestore {
1055: my ($symb,$namespace,$domain,$stuname) = @_;
1056:
1057: if (!$symb) {
1058: $symb=&symbread();
1059: if (!$symb) { $symb= $ENV{'request.url'}; }
1060: }
1061: $symb=escape($symb);
1062:
1063: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1064: #FIXME needs to do something for /pub resources
1065: if (!$domain) { $domain=$ENV{'user.domain'}; }
1066: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1067:
1068: my %returnhash;
1069: $namespace=~s/\//\_/g;
1070: $namespace=~s/\W//g;
1071: my %hash;
1072: my $path=$perlvar{'lonDaemons'}.'/tmp';
1073: if (tie(%hash,'GDBM_File',
1074: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1075: &GDBM_READER,0640)) {
1076: my $version=$hash{"version:$symb"};
1077: $returnhash{'version'}=$version;
1078: my $scope;
1079: for ($scope=1;$scope<=$version;$scope++) {
1080: my $vkeys=$hash{"$scope:keys:$symb"};
1081: my @keys=split(/:/,$vkeys);
1082: my $key;
1083: $returnhash{"$scope:keys"}=$vkeys;
1084: foreach $key (@keys) {
1085: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1086: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1087: }
1088: }
1089: if (!(untie(%hash))) {
1090: return "error:$!";
1091: }
1092: } else {
1093: return "error:$!";
1094: }
1095: return %returnhash;
1096: }
1097:
1098: # ----------------------------------------------------------------------- Store
1099:
1100: sub store {
1101: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1102: my $home='';
1103:
1104: if ($stuname) { $home=&homeserver($stuname,$domain); }
1105:
1106: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1107:
1108: &devalidate($symb);
1109:
1110: $symb=escape($symb);
1111: if (!$namespace) {
1112: unless ($namespace=$ENV{'request.course.id'}) {
1113: return '';
1114: }
1115: }
1116: if (!$domain) { $domain=$ENV{'user.domain'}; }
1117: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1118: if (!$home) { $home=$ENV{'user.home'}; }
1119: my $namevalue='';
1120: map {
1121: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1122: } keys %$storehash;
1123: $namevalue=~s/\&$//;
1124: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1125: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1126: }
1127:
1128: # -------------------------------------------------------------- Critical Store
1129:
1130: sub cstore {
1131: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1132: my $home='';
1133:
1134: if ($stuname) { $home=&homeserver($stuname,$domain); }
1135:
1136: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1137:
1138: &devalidate($symb);
1139:
1140: $symb=escape($symb);
1141: if (!$namespace) {
1142: unless ($namespace=$ENV{'request.course.id'}) {
1143: return '';
1144: }
1145: }
1146: if (!$domain) { $domain=$ENV{'user.domain'}; }
1147: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1148: if (!$home) { $home=$ENV{'user.home'}; }
1149:
1150: my $namevalue='';
1151: map {
1152: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1153: } keys %$storehash;
1154: $namevalue=~s/\&$//;
1155: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1156: return critical
1157: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1158: }
1159:
1160: # --------------------------------------------------------------------- Restore
1161:
1162: sub restore {
1163: my ($symb,$namespace,$domain,$stuname) = @_;
1164: my $home='';
1165:
1166: if ($stuname) { $home=&homeserver($stuname,$domain); }
1167:
1168: if (!$symb) {
1169: unless ($symb=escape(&symbread())) { return ''; }
1170: } else {
1171: $symb=&escape($symb);
1172: }
1173: if (!$namespace) {
1174: unless ($namespace=$ENV{'request.course.id'}) {
1175: return '';
1176: }
1177: }
1178: if (!$domain) { $domain=$ENV{'user.domain'}; }
1179: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1180: if (!$home) { $home=$ENV{'user.home'}; }
1181: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1182:
1183: my %returnhash=();
1184: map {
1185: my ($name,$value)=split(/\=/,$_);
1186: $returnhash{&unescape($name)}=&unescape($value);
1187: } split(/\&/,$answer);
1188: my $version;
1189: for ($version=1;$version<=$returnhash{'version'};$version++) {
1190: map {
1191: $returnhash{$_}=$returnhash{$version.':'.$_};
1192: } split(/\:/,$returnhash{$version.':keys'});
1193: }
1194: return %returnhash;
1195: }
1196:
1197: # ---------------------------------------------------------- Course Description
1198:
1199: sub coursedescription {
1200: my $courseid=shift;
1201: $courseid=~s/^\///;
1202: $courseid=~s/\_/\//g;
1203: my ($cdomain,$cnum)=split(/\//,$courseid);
1204: my $chome=&homeserver($cnum,$cdomain);
1205: if ($chome ne 'no_host') {
1206: my %returnhash=&dump('environment',$cdomain,$cnum);
1207: if (!exists($returnhash{'con_lost'})) {
1208: my $normalid=$cdomain.'_'.$cnum;
1209: my %envhash=();
1210: $returnhash{'home'}= $chome;
1211: $returnhash{'domain'} = $cdomain;
1212: $returnhash{'num'} = $cnum;
1213: while (my ($name,$value) = each %returnhash) {
1214: $envhash{'course.'.$normalid.'.'.$name}=$value;
1215: }
1216: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
1217: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1218: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1219: $envhash{'course.'.$normalid.'.last_cache'}=time;
1220: $envhash{'course.'.$normalid.'.home'}=$chome;
1221: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1222: $envhash{'course.'.$normalid.'.num'}=$cnum;
1223: &appenv(%envhash);
1224: return %returnhash;
1225: }
1226: }
1227: return ();
1228: }
1229:
1230: # -------------------------------------------------------- Get user privileges
1231:
1232: sub rolesinit {
1233: my ($domain,$username,$authhost)=@_;
1234: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1235: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1236: my %allroles=();
1237: my %thesepriv=();
1238: my $now=time;
1239: my $userroles="user.login.time=$now\n";
1240: my $thesestr;
1241:
1242: if ($rolesdump ne '') {
1243: map {
1244: if ($_!~/^rolesdef\&/) {
1245: my ($area,$role)=split(/=/,$_);
1246: $area=~s/\_\w\w$//;
1247: my ($trole,$tend,$tstart)=split(/_/,$role);
1248: $userroles.='user.role.'.$trole.'.'.$area.'='.
1249: $tstart.'.'.$tend."\n";
1250: if ($tend!=0) {
1251: if ($tend<$now) {
1252: $trole='';
1253: }
1254: }
1255: if ($tstart!=0) {
1256: if ($tstart>$now) {
1257: $trole='';
1258: }
1259: }
1260: if (($area ne '') && ($trole ne '')) {
1261: my $spec=$trole.'.'.$area;
1262: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1263: if ($trole =~ /^cr\//) {
1264: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1265: my $homsvr=homeserver($rauthor,$rdomain);
1266: if ($hostname{$homsvr} ne '') {
1267: my $roledef=
1268: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1269: $homsvr);
1270: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1271: my ($syspriv,$dompriv,$coursepriv)=
1272: split(/\_/,unescape($roledef));
1273: $allroles{'cm./'}.=':'.$syspriv;
1274: $allroles{$spec.'./'}.=':'.$syspriv;
1275: if ($tdomain ne '') {
1276: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1277: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1278: if ($trest ne '') {
1279: $allroles{'cm.'.$area}.=':'.$coursepriv;
1280: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1281: }
1282: }
1283: }
1284: }
1285: } else {
1286: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1287: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1288: if ($tdomain ne '') {
1289: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1290: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1291: if ($trest ne '') {
1292: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1293: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1294: }
1295: }
1296: }
1297: }
1298: }
1299: } split(/&/,$rolesdump);
1300: my $adv=0;
1301: my $author=0;
1302: map {
1303: %thesepriv=();
1304: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1305: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1306: map {
1307: if ($_ ne '') {
1308: my ($privilege,$restrictions)=split(/&/,$_);
1309: if ($restrictions eq '') {
1310: $thesepriv{$privilege}='F';
1311: } else {
1312: if ($thesepriv{$privilege} ne 'F') {
1313: $thesepriv{$privilege}.=$restrictions;
1314: }
1315: }
1316: }
1317: } split(/:/,$allroles{$_});
1318: $thesestr='';
1319: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
1320: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1321: } keys %allroles;
1322: $userroles.='user.adv='.$adv."\n".
1323: 'user.author='.$author."\n";
1324: $ENV{'user.adv'}=$adv;
1325: }
1326: return $userroles;
1327: }
1328:
1329: # --------------------------------------------------------------- get interface
1330:
1331: sub get {
1332: my ($namespace,$storearr,$udomain,$uname)=@_;
1333: my $items='';
1334: map {
1335: $items.=escape($_).'&';
1336: } @$storearr;
1337: $items=~s/\&$//;
1338: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1339: if (!$uname) { $uname=$ENV{'user.name'}; }
1340: my $uhome=&homeserver($uname,$udomain);
1341:
1342: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1343: my @pairs=split(/\&/,$rep);
1344: my %returnhash=();
1345: my $i=0;
1346: map {
1347: $returnhash{$_}=unescape($pairs[$i]);
1348: $i++;
1349: } @$storearr;
1350: return %returnhash;
1351: }
1352:
1353: # --------------------------------------------------------------- del interface
1354:
1355: sub del {
1356: my ($namespace,$storearr,$udomain,$uname)=@_;
1357: my $items='';
1358: map {
1359: $items.=escape($_).'&';
1360: } @$storearr;
1361: $items=~s/\&$//;
1362: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1363: if (!$uname) { $uname=$ENV{'user.name'}; }
1364: my $uhome=&homeserver($uname,$udomain);
1365:
1366: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1367: }
1368:
1369: # -------------------------------------------------------------- dump interface
1370:
1371: sub dump {
1372: my ($namespace,$udomain,$uname)=@_;
1373: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1374: if (!$uname) { $uname=$ENV{'user.name'}; }
1375: my $uhome=&homeserver($uname,$udomain);
1376: my $rep=reply("dump:$udomain:$uname:$namespace",$uhome);
1377: my @pairs=split(/\&/,$rep);
1378: my %returnhash=();
1379: map {
1380: my ($key,$value)=split(/=/,$_);
1381: $returnhash{unescape($key)}=unescape($value);
1382: } @pairs;
1383: return %returnhash;
1384: }
1385:
1386: # --------------------------------------------------------------- put interface
1387:
1388: sub put {
1389: my ($namespace,$storehash,$udomain,$uname)=@_;
1390: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1391: if (!$uname) { $uname=$ENV{'user.name'}; }
1392: my $uhome=&homeserver($uname,$udomain);
1393: my $items='';
1394: map {
1395: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1396: } keys %$storehash;
1397: $items=~s/\&$//;
1398: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1399: }
1400:
1401: # ------------------------------------------------------ critical put interface
1402:
1403: sub cput {
1404: my ($namespace,$storehash,$udomain,$uname)=@_;
1405: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1406: if (!$uname) { $uname=$ENV{'user.name'}; }
1407: my $uhome=&homeserver($uname,$udomain);
1408: my $items='';
1409: map {
1410: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1411: } keys %$storehash;
1412: $items=~s/\&$//;
1413: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1414: }
1415:
1416: # -------------------------------------------------------------- eget interface
1417:
1418: sub eget {
1419: my ($namespace,$storearr,$udomain,$uname)=@_;
1420: my $items='';
1421: map {
1422: $items.=escape($_).'&';
1423: } @$storearr;
1424: $items=~s/\&$//;
1425: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1426: if (!$uname) { $uname=$ENV{'user.name'}; }
1427: my $uhome=&homeserver($uname,$udomain);
1428: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1429: my @pairs=split(/\&/,$rep);
1430: my %returnhash=();
1431: my $i=0;
1432: map {
1433: $returnhash{$_}=unescape($pairs[$i]);
1434: $i++;
1435: } @$storearr;
1436: return %returnhash;
1437: }
1438:
1439: # ------------------------------------------------- Check for a user privilege
1440:
1441: sub allowed {
1442: my ($priv,$uri)=@_;
1443:
1444: my $orguri=$uri;
1445: $uri=&declutter($uri);
1446:
1447: # Free bre access to adm and meta resources
1448:
1449: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1450: return 'F';
1451: }
1452:
1453: # Free bre to public access
1454:
1455: if ($priv eq 'bre') {
1456: if (&metadata($uri,'copyright') eq 'public') { return 'F'; }
1457: }
1458:
1459: my $thisallowed='';
1460: my $statecond=0;
1461: my $courseprivid='';
1462:
1463: # Course
1464:
1465: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1466: $thisallowed.=$1;
1467: }
1468:
1469: # Domain
1470:
1471: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1472: =~/$priv\&([^\:]*)/) {
1473: $thisallowed.=$1;
1474: }
1475:
1476: # Course: uri itself is a course
1477: my $courseuri=$uri;
1478: $courseuri=~s/\_(\d)/\/$1/;
1479: $courseuri=~s/^([^\/])/\/$1/;
1480:
1481: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1482: =~/$priv\&([^\:]*)/) {
1483: $thisallowed.=$1;
1484: }
1485:
1486: # Full access at system, domain or course-wide level? Exit.
1487:
1488: if ($thisallowed=~/F/) {
1489: return 'F';
1490: }
1491:
1492: # If this is generating or modifying users, exit with special codes
1493:
1494: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1495: return $thisallowed;
1496: }
1497: #
1498: # Gathered so far: system, domain and course wide privileges
1499: #
1500: # Course: See if uri or referer is an individual resource that is part of
1501: # the course
1502:
1503: if ($ENV{'request.course.id'}) {
1504: $courseprivid=$ENV{'request.course.id'};
1505: if ($ENV{'request.course.sec'}) {
1506: $courseprivid.='/'.$ENV{'request.course.sec'};
1507: }
1508: $courseprivid=~s/\_/\//;
1509: my $checkreferer=1;
1510: my @uriparts=split(/\//,$uri);
1511: my $filename=$uriparts[$#uriparts];
1512: my $pathname=$uri;
1513: $pathname=~s/\/$filename$//;
1514: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1515: /\&$filename\:([\d\|]+)\&/) {
1516: $statecond=$1;
1517: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1518: =~/$priv\&([^\:]*)/) {
1519: $thisallowed.=$1;
1520: $checkreferer=0;
1521: }
1522: }
1523:
1524: if ($checkreferer) {
1525: my $refuri=$ENV{'httpref.'.$orguri};
1526:
1527: unless ($refuri) {
1528: map {
1529: if ($_=~/^httpref\..*\*/) {
1530: my $pattern=$_;
1531: $pattern=~s/^httpref\.\/res\///;
1532: $pattern=~s/\*/\[\^\/\]\+/g;
1533: $pattern=~s/\//\\\//g;
1534: if ($orguri=~/$pattern/) {
1535: $refuri=$ENV{$_};
1536: }
1537: }
1538: } keys %ENV;
1539: }
1540: if ($refuri) {
1541: $refuri=&declutter($refuri);
1542: my @uriparts=split(/\//,$refuri);
1543: my $filename=$uriparts[$#uriparts];
1544: my $pathname=$refuri;
1545: $pathname=~s/\/$filename$//;
1546: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1547: /\&$filename\:([\d\|]+)\&/) {
1548: my $refstatecond=$1;
1549: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1550: =~/$priv\&([^\:]*)/) {
1551: $thisallowed.=$1;
1552: $uri=$refuri;
1553: $statecond=$refstatecond;
1554: }
1555: }
1556: }
1557: }
1558: }
1559:
1560: #
1561: # Gathered now: all privileges that could apply, and condition number
1562: #
1563: #
1564: # Full or no access?
1565: #
1566:
1567: if ($thisallowed=~/F/) {
1568: return 'F';
1569: }
1570:
1571: unless ($thisallowed) {
1572: return '';
1573: }
1574:
1575: # Restrictions exist, deal with them
1576: #
1577: # C:according to course preferences
1578: # R:according to resource settings
1579: # L:unless locked
1580: # X:according to user session state
1581: #
1582:
1583: # Possibly locked functionality, check all courses
1584: # Locks might take effect only after 10 minutes cache expiration for other
1585: # courses, and 2 minutes for current course
1586:
1587: my $envkey;
1588: if ($thisallowed=~/L/) {
1589: foreach $envkey (keys %ENV) {
1590: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1591: my $courseid=$2;
1592: my $roleid=$1.'.'.$2;
1593: $courseid=~s/^\///;
1594: my $expiretime=600;
1595: if ($ENV{'request.role'} eq $roleid) {
1596: $expiretime=120;
1597: }
1598: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1599: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1600: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1601: &coursedescription($courseid);
1602: }
1603: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1604: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1605: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1606: &log($ENV{'user.domain'},$ENV{'user.name'},
1607: $ENV{'user.host'},
1608: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1609: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1610: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1611: return '';
1612: }
1613: }
1614: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1615: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1616: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1617: &log($ENV{'user.domain'},$ENV{'user.name'},
1618: $ENV{'user.host'},
1619: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1620: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1621: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1622: return '';
1623: }
1624: }
1625: }
1626: }
1627: }
1628:
1629: #
1630: # Rest of the restrictions depend on selected course
1631: #
1632:
1633: unless ($ENV{'request.course.id'}) {
1634: return '1';
1635: }
1636:
1637: #
1638: # Now user is definitely in a course
1639: #
1640:
1641:
1642: # Course preferences
1643:
1644: if ($thisallowed=~/C/) {
1645: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1646: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1647: =~/\,$rolecode\,/) {
1648: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1649: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1650: $ENV{'request.course.id'});
1651: return '';
1652: }
1653: }
1654:
1655: # Resource preferences
1656:
1657: if ($thisallowed=~/R/) {
1658: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1659: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1660: if (-e $filename) {
1661: my @content;
1662: {
1663: my $fh=Apache::File->new($filename);
1664: @content=<$fh>;
1665: }
1666: if (join('',@content)=~
1667: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1668: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1669: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1670: return '';
1671:
1672: }
1673: }
1674: }
1675:
1676: # Restricted by state?
1677:
1678: if ($thisallowed=~/X/) {
1679: if (&condval($statecond)) {
1680: return '2';
1681: } else {
1682: return '';
1683: }
1684: }
1685:
1686: return 'F';
1687: }
1688:
1689: # ----------------------------------------------------------------- Define Role
1690:
1691: sub definerole {
1692: if (allowed('mcr','/')) {
1693: my ($rolename,$sysrole,$domrole,$courole)=@_;
1694: map {
1695: my ($crole,$cqual)=split(/\&/,$_);
1696: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1697: if ($pr{'cr:s'}=~/$crole\&/) {
1698: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1699: return "refused:s:$crole&$cqual";
1700: }
1701: }
1702: } split('/',$sysrole);
1703: map {
1704: my ($crole,$cqual)=split(/\&/,$_);
1705: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1706: if ($pr{'cr:d'}=~/$crole\&/) {
1707: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1708: return "refused:d:$crole&$cqual";
1709: }
1710: }
1711: } split('/',$domrole);
1712: map {
1713: my ($crole,$cqual)=split(/\&/,$_);
1714: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1715: if ($pr{'cr:c'}=~/$crole\&/) {
1716: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1717: return "refused:c:$crole&$cqual";
1718: }
1719: }
1720: } split('/',$courole);
1721: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1722: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1723: "rolesdef_$rolename=".
1724: escape($sysrole.'_'.$domrole.'_'.$courole);
1725: return reply($command,$ENV{'user.home'});
1726: } else {
1727: return 'refused';
1728: }
1729: }
1730:
1731: # ---------------- Make a metadata query against the network of library servers
1732:
1733: sub metadata_query {
1734: my ($query,$custom,$customshow)=@_;
1735: my %rhash;
1736: for my $server (keys %libserv) {
1737: unless ($custom or $customshow) {
1738: my $reply=&reply("querysend:".&escape($query),$server);
1739: $rhash{$server}=$reply;
1740: }
1741: else {
1742: my $reply=&reply("querysend:".&escape($query).':'.
1743: &escape($custom).':'.&escape($customshow),
1744: $server);
1745: $rhash{$server}=$reply;
1746: }
1747: }
1748: return \%rhash;
1749: }
1750:
1751: # ------------------------------------------------------------------ Plain Text
1752:
1753: sub plaintext {
1754: my $short=shift;
1755: return $prp{$short};
1756: }
1757:
1758: # ------------------------------------------------------------- Embedding Style
1759:
1760: sub fileembstyle {
1761: my $ending=lc(shift);
1762: return $fe{$ending};
1763: }
1764:
1765: # ------------------------------------------------------------ Description Text
1766:
1767: sub filedescription {
1768: my $ending=lc(shift);
1769: return $fd{$ending};
1770: }
1771:
1772: # ----------------------------------------------------------------- Assign Role
1773:
1774: sub assignrole {
1775: my ($udom,$uname,$url,$role,$end,$start)=@_;
1776: my $mrole;
1777: if ($role =~ /^cr\//) {
1778: unless (&allowed('ccr',$url)) {
1779: &logthis('Refused custom assignrole: '.
1780: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1781: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1782: return 'refused';
1783: }
1784: $mrole='cr';
1785: } else {
1786: my $cwosec=$url;
1787: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1788: unless (&allowed('c'.$role,$cwosec)) {
1789: &logthis('Refused assignrole: '.
1790: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1791: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1792: return 'refused';
1793: }
1794: $mrole=$role;
1795: }
1796: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1797: "$udom:$uname:$url".'_'."$mrole=$role";
1798: if ($end) { $command.='_'.$end; }
1799: if ($start) {
1800: if ($end) {
1801: $command.='_'.$start;
1802: } else {
1803: $command.='_0_'.$start;
1804: }
1805: }
1806: return &reply($command,&homeserver($uname,$udom));
1807: }
1808:
1809: # -------------------------------------------------- Modify user authentication
1810: sub modifyuserauth {
1811: my ($udom,$uname,$umode,$upass)=@_;
1812: my $uhome=&homeserver($uname,$udom);
1813: &logthis('Call to modify user authentication'.$udom.', '.$uname.', '.
1814: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
1815: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
1816: &escape($upass),$uhome);
1817: unless ($reply eq 'ok') {
1818: return 'error: '.$reply;
1819: }
1820: return 'ok';
1821: }
1822:
1823: # --------------------------------------------------------------- Modify a user
1824:
1825:
1826: sub modifyuser {
1827: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1828: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1829: $umode.', '.$first.', '.$middle.', '.
1830: $last.', '.$gene.' by '.
1831: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1832: my $uhome=&homeserver($uname,$udom);
1833: # ----------------------------------------------------------------- Create User
1834: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1835: my $unhome='';
1836: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1837: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1838: } else {
1839: my $tryserver;
1840: my $loadm=10000000;
1841: foreach $tryserver (keys %libserv) {
1842: if ($hostdom{$tryserver} eq $udom) {
1843: my $answer=reply('load',$tryserver);
1844: if (($answer=~/\d+/) && ($answer<$loadm)) {
1845: $loadm=$answer;
1846: $unhome=$tryserver;
1847: }
1848: }
1849: }
1850: }
1851: if (($unhome eq '') || ($unhome eq 'no_host')) {
1852: return 'error: find home';
1853: }
1854: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1855: &escape($upass),$unhome);
1856: unless ($reply eq 'ok') {
1857: return 'error: '.$reply;
1858: }
1859: $uhome=&homeserver($uname,$udom);
1860: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1861: return 'error: verify home';
1862: }
1863: }
1864: # ---------------------------------------------------------------------- Add ID
1865: if ($uid) {
1866: $uid=~tr/A-Z/a-z/;
1867: my %uidhash=&idrget($udom,$uname);
1868: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1869: unless ($uid eq $uidhash{$uname}) {
1870: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1871: }
1872: } else {
1873: &idput($udom,($uname => $uid));
1874: }
1875: }
1876: # -------------------------------------------------------------- Add names, etc
1877: my %names=&get('environment',
1878: ['firstname','middlename','lastname','generation'],
1879: $udom,$uname);
1880: if ($first) { $names{'firstname'} = $first; }
1881: if ($middle) { $names{'middlename'} = $middle; }
1882: if ($last) { $names{'lastname'} = $last; }
1883: if ($gene) { $names{'generation'} = $gene; }
1884: my $reply = &put('environment', \%names, $udom,$uname);
1885: if ($reply ne 'ok') { return 'error: '.$reply; }
1886: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1887: $umode.', '.$first.', '.$middle.', '.
1888: $last.', '.$gene.' by '.
1889: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1890: return 'ok';
1891: }
1892:
1893: # -------------------------------------------------------------- Modify student
1894:
1895: sub modifystudent {
1896: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1897: $end,$start)=@_;
1898: my $cid='';
1899: unless ($cid=$ENV{'request.course.id'}) {
1900: return 'not_in_class';
1901: }
1902: # --------------------------------------------------------------- Make the user
1903: my $reply=&modifyuser
1904: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1905: unless ($reply eq 'ok') { return $reply; }
1906: my $uhome=&homeserver($uname,$udom);
1907: if (($uhome eq '') || ($uhome eq 'no_host')) {
1908: return 'error: no such user';
1909: }
1910: # -------------------------------------------------- Add student to course list
1911: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1912: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1913: &escape($uname.':'.$udom).'='.
1914: &escape($end.':'.$start),
1915: $ENV{'course.'.$cid.'.home'});
1916: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1917: return 'error: '.$reply;
1918: }
1919: # ---------------------------------------------------- Add student role to user
1920: my $uurl='/'.$cid;
1921: $uurl=~s/\_/\//g;
1922: if ($usec) {
1923: $uurl.='/'.$usec;
1924: }
1925: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1926: }
1927:
1928: # ------------------------------------------------- Write to course preferences
1929:
1930: sub writecoursepref {
1931: my ($courseid,%prefs)=@_;
1932: $courseid=~s/^\///;
1933: $courseid=~s/\_/\//g;
1934: my ($cdomain,$cnum)=split(/\//,$courseid);
1935: my $chome=homeserver($cnum,$cdomain);
1936: if (($chome eq '') || ($chome eq 'no_host')) {
1937: return 'error: no such course';
1938: }
1939: my $cstring='';
1940: map {
1941: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1942: } keys %prefs;
1943: $cstring=~s/\&$//;
1944: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1945: }
1946:
1947: # ---------------------------------------------------------- Make/modify course
1948:
1949: sub createcourse {
1950: my ($udom,$description,$url)=@_;
1951: $url=&declutter($url);
1952: my $cid='';
1953: unless (&allowed('ccc',$ENV{'user.domain'})) {
1954: return 'refused';
1955: }
1956: unless ($udom eq $ENV{'user.domain'}) {
1957: return 'refused';
1958: }
1959: # ------------------------------------------------------------------- Create ID
1960: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1961: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1962: # ----------------------------------------------- Make sure that does not exist
1963: my $uhome=&homeserver($uname,$udom);
1964: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1965: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1966: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1967: $uhome=&homeserver($uname,$udom);
1968: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1969: return 'error: unable to generate unique course-ID';
1970: }
1971: }
1972: # ------------------------------------------------------------- Make the course
1973: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1974: $ENV{'user.home'});
1975: unless ($reply eq 'ok') { return 'error: '.$reply; }
1976: $uhome=&homeserver($uname,$udom);
1977: if (($uhome eq '') || ($uhome eq 'no_host')) {
1978: return 'error: no such course';
1979: }
1980: &writecoursepref($udom.'_'.$uname,
1981: ('description' => $description,
1982: 'url' => $url));
1983: return '/'.$udom.'/'.$uname;
1984: }
1985:
1986: # ---------------------------------------------------------- Assign Custom Role
1987:
1988: sub assigncustomrole {
1989: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1990: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1991: $end,$start);
1992: }
1993:
1994: # ----------------------------------------------------------------- Revoke Role
1995:
1996: sub revokerole {
1997: my ($udom,$uname,$url,$role)=@_;
1998: my $now=time;
1999: return &assignrole($udom,$uname,$url,$role,$now);
2000: }
2001:
2002: # ---------------------------------------------------------- Revoke Custom Role
2003:
2004: sub revokecustomrole {
2005: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2006: my $now=time;
2007: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2008: }
2009:
2010: # ------------------------------------------------------------ Directory lister
2011:
2012: sub dirlist {
2013: my $uri=shift;
2014: $uri=~s/^\///;
2015: $uri=~s/\/$//;
2016: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
2017: if ($udom) {
2018: if ($uname) {
2019: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
2020: homeserver($uname,$udom));
2021: return split(/:/,$listing);
2022: } else {
2023: my $tryserver;
2024: my %allusers=();
2025: foreach $tryserver (keys %libserv) {
2026: if ($hostdom{$tryserver} eq $udom) {
2027: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
2028: $tryserver);
2029: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2030: && ($listing ne 'con_lost')) {
2031: map {
2032: my ($entry,@stat)=split(/&/,$_);
2033: $allusers{$entry}=1;
2034: } split(/:/,$listing);
2035: }
2036: }
2037: }
2038: my $alluserstr='';
2039: map {
2040: $alluserstr.=$_.'&user:';
2041: } sort keys %allusers;
2042: $alluserstr=~s/:$//;
2043: return split(/:/,$alluserstr);
2044: }
2045: } else {
2046: my $tryserver;
2047: my %alldom=();
2048: foreach $tryserver (keys %libserv) {
2049: $alldom{$hostdom{$tryserver}}=1;
2050: }
2051: my $alldomstr='';
2052: map {
2053: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2054: } sort keys %alldom;
2055: $alldomstr=~s/:$//;
2056: return split(/:/,$alldomstr);
2057: }
2058: }
2059:
2060: # -------------------------------------------------------- Value of a Condition
2061:
2062: sub directcondval {
2063: my $number=shift;
2064: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2065: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2066: } else {
2067: return 2;
2068: }
2069: }
2070:
2071: sub condval {
2072: my $condidx=shift;
2073: my $result=0;
2074: my $allpathcond='';
2075: map {
2076: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2077: $allpathcond.=
2078: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2079: }
2080: } split(/\|/,$condidx);
2081: $allpathcond=~s/\|$//;
2082: if ($ENV{'request.course.id'}) {
2083: if ($allpathcond) {
2084: my $operand='|';
2085: my @stack;
2086: map {
2087: if ($_ eq '(') {
2088: push @stack,($operand,$result)
2089: } elsif ($_ eq ')') {
2090: my $before=pop @stack;
2091: if (pop @stack eq '&') {
2092: $result=$result>$before?$before:$result;
2093: } else {
2094: $result=$result>$before?$result:$before;
2095: }
2096: } elsif (($_ eq '&') || ($_ eq '|')) {
2097: $operand=$_;
2098: } else {
2099: my $new=directcondval($_);
2100: if ($operand eq '&') {
2101: $result=$result>$new?$new:$result;
2102: } else {
2103: $result=$result>$new?$result:$new;
2104: }
2105: }
2106: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
2107: }
2108: }
2109: return $result;
2110: }
2111:
2112: # --------------------------------------------------------- Value of a Variable
2113:
2114: sub EXT {
2115: my ($varname,$symbparm)=@_;
2116: unless ($varname) { return ''; }
2117: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2118: my $rest;
2119: if ($therest[0]) {
2120: $rest=join('.',@therest);
2121: } else {
2122: $rest='';
2123: }
2124: my $qualifierrest=$qualifier;
2125: if ($rest) { $qualifierrest.='.'.$rest; }
2126: my $spacequalifierrest=$space;
2127: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2128: if ($realm eq 'user') {
2129: # --------------------------------------------------------------- user.resource
2130: if ($space eq 'resource') {
2131: my %restored=&restore();
2132: return $restored{$qualifierrest};
2133: # ----------------------------------------------------------------- user.access
2134: } elsif ($space eq 'access') {
2135: return &allowed($qualifier,$rest);
2136: # ------------------------------------------ user.preferences, user.environment
2137: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2138: return $ENV{join('.',('environment',$qualifierrest))};
2139: # ----------------------------------------------------------------- user.course
2140: } elsif ($space eq 'course') {
2141: return $ENV{join('.',('request.course',$qualifier))};
2142: # ------------------------------------------------------------------- user.role
2143: } elsif ($space eq 'role') {
2144: my ($role,$where)=split(/\./,$ENV{'request.role'});
2145: if ($qualifier eq 'value') {
2146: return $role;
2147: } elsif ($qualifier eq 'extent') {
2148: return $where;
2149: }
2150: # ----------------------------------------------------------------- user.domain
2151: } elsif ($space eq 'domain') {
2152: return $ENV{'user.domain'};
2153: # ------------------------------------------------------------------- user.name
2154: } elsif ($space eq 'name') {
2155: return $ENV{'user.name'};
2156: # ---------------------------------------------------- Any other user namespace
2157: } else {
2158: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2159: my %reply=&get($space,[$item]);
2160: return $reply{$item};
2161: }
2162: } elsif ($realm eq 'request') {
2163: # ------------------------------------------------------------- request.browser
2164: if ($space eq 'browser') {
2165: return $ENV{'browser.'.$qualifier};
2166: # ------------------------------------------------------------ request.filename
2167: } else {
2168: return $ENV{'request.'.$spacequalifierrest};
2169: }
2170: } elsif ($realm eq 'course') {
2171: # ---------------------------------------------------------- course.description
2172: return $ENV{'course.'.$ENV{'request.course.id'}.'.'.
2173: $spacequalifierrest};
2174: } elsif ($realm eq 'resource') {
2175: if ($ENV{'request.course.id'}) {
2176:
2177: # print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2178:
2179:
2180: # ----------------------------------------------------- Cascading lookup scheme
2181: my $symbp;
2182: if ($symbparm) {
2183: $symbp=$symbparm;
2184: } else {
2185: $symbp=&symbread();
2186: }
2187: my $mapp=(split(/\_\_\_/,$symbp))[0];
2188:
2189: my $symbparm=$symbp.'.'.$spacequalifierrest;
2190: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2191:
2192: my $seclevel=
2193: $ENV{'request.course.id'}.'.['.
2194: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
2195: my $seclevelr=
2196: $ENV{'request.course.id'}.'.['.
2197: $ENV{'request.course.sec'}.'].'.$symbparm;
2198: my $seclevelm=
2199: $ENV{'request.course.id'}.'.['.
2200: $ENV{'request.course.sec'}.'].'.$mapparm;
2201:
2202: my $courselevel=
2203: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
2204: my $courselevelr=
2205: $ENV{'request.course.id'}.'.'.$symbparm;
2206: my $courselevelm=
2207: $ENV{'request.course.id'}.'.'.$mapparm;
2208:
2209: # ----------------------------------------------------------- first, check user
2210: my %resourcedata=get('resourcedata',
2211: [$courselevelr,$courselevelm,$courselevel]);
2212: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2213: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2214:
2215: if ($resourcedata{$courselevelr}) {
2216: return $resourcedata{$courselevelr}; }
2217: if ($resourcedata{$courselevelm}) {
2218: return $resourcedata{$courselevelm}; }
2219: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
2220:
2221: } else {
2222: if ($resourcedata{$courselevelr}!~/No such file/) {
2223: &logthis("<font color=blue>WARNING:".
2224: " Trying to get resource data for ".$ENV{'user.name'}." at "
2225: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
2226: "</font>");
2227: }
2228: }
2229:
2230: # -------------------------------------------------------- second, check course
2231:
2232: my $reply=&reply('get:'.
2233: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
2234: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2235: ':resourcedata:'.
2236: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
2237: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
2238: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
2239: if ($reply!~/^error\:/) {
2240: map {
2241: if ($_) { return &unescape($_); }
2242: } split(/\&/,$reply);
2243: }
2244: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
2245: &logthis("<font color=blue>WARNING:".
2246: " Getting ".$reply." asking for ".$varname." for ".
2247: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2248: ' at '.
2249: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
2250: ' from '.
2251: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
2252: "</font>");
2253: }
2254: # ------------------------------------------------------ third, check map parms
2255: my %parmhash=();
2256: my $thisparm='';
2257: if (tie(%parmhash,'GDBM_File',
2258: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
2259: $thisparm=$parmhash{$symbparm};
2260: untie(%parmhash);
2261: }
2262: if ($thisparm) { return $thisparm; }
2263: }
2264:
2265: # --------------------------------------------- last, look in resource metadata
2266:
2267: $spacequalifierrest=~s/\./\_/;
2268: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2269: if ($metadata) { return $metadata; }
2270: $metadata=&metadata($ENV{'request.filename'},
2271: 'parameter_'.$spacequalifierrest);
2272: if ($metadata) { return $metadata; }
2273:
2274: # ------------------------------------------------------------------ Cascade up
2275:
2276: unless ($space eq '0') {
2277: my ($part,$id)=split(/\_/,$space);
2278: if ($id) {
2279: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2280: $symbparm);
2281: if ($partgeneral) { return $partgeneral; }
2282: } else {
2283: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2284: $symbparm);
2285: if ($resourcegeneral) { return $resourcegeneral; }
2286: }
2287: }
2288:
2289: # ---------------------------------------------------- Any other user namespace
2290: } elsif ($realm eq 'environment') {
2291: # ----------------------------------------------------------------- environment
2292: return $ENV{'environment.'.$spacequalifierrest};
2293: } elsif ($realm eq 'system') {
2294: # ----------------------------------------------------------------- system.time
2295: if ($space eq 'time') {
2296: return time;
2297: }
2298: }
2299: return '';
2300: }
2301:
2302: # ---------------------------------------------------------------- Get metadata
2303:
2304: sub metadata {
2305: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
2306:
2307: $uri=&declutter($uri);
2308: my $filename=$uri;
2309: $uri=~s/\.meta$//;
2310: #
2311: # Is the metadata already cached?
2312: # Look at timestamp of caching
2313: # Everything is cached by the main uri, libraries are never directly cached
2314: #
2315: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
2316: #
2317: # Is this a recursive call for a library?
2318: #
2319: if ($liburi) {
2320: $liburi=&declutter($liburi);
2321: $filename=$liburi;
2322: }
2323: my %metathesekeys=();
2324: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2325: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2326: my $parser=HTML::TokeParser->new(\$metastring);
2327: my $token;
2328: undef %metathesekeys;
2329: while ($token=$parser->get_token) {
2330: if ($token->[0] eq 'S') {
2331: if (defined($token->[2]->{'package'})) {
2332: #
2333: # This is a package - get package info
2334: #
2335: my $package=$token->[2]->{'package'};
2336: my $keyroot='';
2337: if ($prefix) {
2338: $keyroot.='_'.$prefix;
2339: } else {
2340: if (defined($token->[2]->{'part'})) {
2341: $keyroot.='_'.$token->[2]->{'part'};
2342: }
2343: }
2344: if (defined($token->[2]->{'id'})) {
2345: $keyroot.='_'.$token->[2]->{'id'};
2346: }
2347: if ($metacache{$uri.':packages'}) {
2348: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2349: } else {
2350: $metacache{$uri.':packages'}=$package.$keyroot;
2351: }
2352: map {
2353: if ($_=~/^$package\&/) {
2354: my ($pack,$name,$subp)=split(/\&/,$_);
2355: my $value=$packagetab{$_};
2356: my $part=$keyroot;
2357: $part=~s/^\_//;
2358: if ($subp eq 'display') {
2359: $value.=' [Part: '.$part.']';
2360: }
2361: my $unikey='parameter'.$keyroot.'_'.$name;
2362: $metathesekeys{$unikey}=1;
2363: $metacache{$uri.':'.$unikey.'.part'}=$part;
2364: unless
2365: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2366: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2367: }
2368: }
2369: } keys %packagetab;
2370: } else {
2371: #
2372: # This is not a package - some other kind of start tag
2373: #
2374: my $entry=$token->[1];
2375: my $unikey;
2376: if ($entry eq 'import') {
2377: $unikey='';
2378: } else {
2379: $unikey=$entry;
2380: }
2381: if ($prefix) {
2382: $unikey.=$prefix;
2383: } else {
2384: if (defined($token->[2]->{'part'})) {
2385: $unikey.='_'.$token->[2]->{'part'};
2386: }
2387: }
2388: if (defined($token->[2]->{'id'})) {
2389: $unikey.='_'.$token->[2]->{'id'};
2390: }
2391:
2392: if ($entry eq 'import') {
2393: #
2394: # Importing a library here
2395: #
2396: if (defined($depthcount)) { $depthcount++; } else
2397: { $depthcount=0; }
2398: if ($depthcount<20) {
2399: map {
2400: $metathesekeys{$_}=1;
2401: } split(/\,/,&metadata($uri,'keys',
2402: $parser->get_text('/import'),$unikey,
2403: $depthcount));
2404: }
2405: } else {
2406:
2407: if (defined($token->[2]->{'name'})) {
2408: $unikey.='_'.$token->[2]->{'name'};
2409: }
2410: $metathesekeys{$unikey}=1;
2411: map {
2412: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2413: } @{$token->[3]};
2414: unless (
2415: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
2416: ) { $metacache{$uri.':'.$unikey}=
2417: $metacache{$uri.':'.$unikey.'.default'};
2418: }
2419: # end of not-a-package not-a-library import
2420: }
2421: # end of not-a-package start tag
2422: }
2423: # the next is the end of "start tag"
2424: }
2425: }
2426: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2427: $metacache{$uri.':cachedtimestamp'}=time;
2428: # this is the end of "was not already recently cached
2429: }
2430: return $metacache{$uri.':'.$what};
2431: }
2432:
2433: # ------------------------------------------------- Update symbolic store links
2434:
2435: sub symblist {
2436: my ($mapname,%newhash)=@_;
2437: $mapname=declutter($mapname);
2438: my %hash;
2439: if (($ENV{'request.course.fn'}) && (%newhash)) {
2440: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2441: &GDBM_WRCREAT,0640)) {
2442: map {
2443: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2444: } keys %newhash;
2445: if (untie(%hash)) {
2446: return 'ok';
2447: }
2448: }
2449: }
2450: return 'error';
2451: }
2452:
2453: # ------------------------------------------------------ Return symb list entry
2454:
2455: sub symbread {
2456: my $thisfn=shift;
2457: unless ($thisfn) {
2458: if ($ENV{'request.symb'}) { return $ENV{'request.symb'}; }
2459: $thisfn=$ENV{'request.filename'};
2460: }
2461: $thisfn=declutter($thisfn);
2462: my %hash;
2463: my %bighash;
2464: my $syval='';
2465: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2466: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2467: &GDBM_READER,0640)) {
2468: $syval=$hash{$thisfn};
2469: untie(%hash);
2470: }
2471: # ---------------------------------------------------------- There was an entry
2472: if ($syval) {
2473: unless ($syval=~/\_\d+$/) {
2474: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2475: &appenv('request.ambiguous' => $thisfn);
2476: return '';
2477: }
2478: $syval.=$1;
2479: }
2480: } else {
2481: # ------------------------------------------------------- Was not in symb table
2482: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2483: &GDBM_READER,0640)) {
2484: # ---------------------------------------------- Get ID(s) for current resource
2485: my $ids=$bighash{'ids_/res/'.$thisfn};
2486: unless ($ids) {
2487: $ids=$bighash{'ids_/'.$thisfn};
2488: }
2489: if ($ids) {
2490: # ------------------------------------------------------------------- Has ID(s)
2491: my @possibilities=split(/\,/,$ids);
2492: if ($#possibilities==0) {
2493: # ----------------------------------------------- There is only one possibility
2494: my ($mapid,$resid)=split(/\./,$ids);
2495: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2496: } else {
2497: # ------------------------------------------ There is more than one possibility
2498: my $realpossible=0;
2499: map {
2500: my $file=$bighash{'src_'.$_};
2501: if (&allowed('bre',$file)) {
2502: my ($mapid,$resid)=split(/\./,$_);
2503: if ($bighash{'map_type_'.$mapid} ne 'page') {
2504: $realpossible++;
2505: $syval=declutter($bighash{'map_id_'.$mapid}).
2506: '___'.$resid;
2507: }
2508: }
2509: } @possibilities;
2510: if ($realpossible!=1) { $syval=''; }
2511: }
2512: }
2513: untie(%bighash)
2514: }
2515: }
2516: if ($syval) {
2517: return $syval.'___'.$thisfn;
2518: }
2519: }
2520: &appenv('request.ambiguous' => $thisfn);
2521: return '';
2522: }
2523:
2524: # ---------------------------------------------------------- Return random seed
2525:
2526: sub numval {
2527: my $txt=shift;
2528: $txt=~tr/A-J/0-9/;
2529: $txt=~tr/a-j/0-9/;
2530: $txt=~tr/K-T/0-9/;
2531: $txt=~tr/k-t/0-9/;
2532: $txt=~tr/U-Z/0-5/;
2533: $txt=~tr/u-z/0-5/;
2534: $txt=~s/\D//g;
2535: return int($txt);
2536: }
2537:
2538: sub rndseed {
2539: my ($symb,$courseid,$domain,$username)=@_;
2540: if (!$symb) {
2541: unless ($symb=&symbread()) { return time; }
2542: }
2543: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2544: if (!$domain) {$domain=$ENV{'user.domain'};}
2545: if (!$username) {$username=$ENV{'user.name'};}
2546: {
2547: use integer;
2548: my $symbchck=unpack("%32C*",$symb) << 27;
2549: my $symbseed=numval($symb) << 22;
2550: my $namechck=unpack("%32C*",$username) << 17;
2551: my $nameseed=numval($username) << 12;
2552: my $domainseed=unpack("%32C*",$domain) << 7;
2553: my $courseseed=unpack("%32C*",$courseid);
2554: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2555: #uncommenting these lines can break things!
2556: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2557: #&Apache::lonxml::debug("rndseed :$num:$symb");
2558: return $num;
2559: }
2560: }
2561:
2562: sub ireceipt {
2563: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2564: my $cuname=unpack("%32C*",$funame);
2565: my $cudom=unpack("%32C*",$fudom);
2566: my $cucourseid=unpack("%32C*",$fucourseid);
2567: my $cusymb=unpack("%32C*",$fusymb);
2568: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2569: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2570: ($cunique%$cuname+
2571: $cunique%$cudom+
2572: $cusymb%$cuname+
2573: $cusymb%$cudom+
2574: $cucourseid%$cuname+
2575: $cucourseid%$cudom);
2576: }
2577:
2578: sub receipt {
2579: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2580: $ENV{'request.course.id'},&symbread());
2581: }
2582:
2583: # ------------------------------------------------------------ Serves up a file
2584: # returns either the contents of the file or a -1
2585: sub getfile {
2586: my $file=shift;
2587: &repcopy($file);
2588: if (! -e $file ) { return -1; };
2589: my $fh=Apache::File->new($file);
2590: my $a='';
2591: while (<$fh>) { $a .=$_; }
2592: return $a
2593: }
2594:
2595: sub filelocation {
2596: my ($dir,$file) = @_;
2597: my $location;
2598: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2599: if ($file=~m:^/~:) { # is a contruction space reference
2600: $location = $file;
2601: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2602: } else {
2603: $file=~s/^$perlvar{'lonDocRoot'}//;
2604: $file=~s:^/*res::;
2605: if ( !( $file =~ m:^/:) ) {
2606: $location = $dir. '/'.$file;
2607: } else {
2608: $location = '/home/httpd/html/res'.$file;
2609: }
2610: }
2611: $location=~s://+:/:g; # remove duplicate /
2612: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2613: return $location;
2614: }
2615:
2616: sub hreflocation {
2617: my ($dir,$file)=@_;
2618: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
2619: my $finalpath=filelocation($dir,$file);
2620: $finalpath=~s/^\/home\/httpd\/html//;
2621: return $finalpath;
2622: } else {
2623: return $file;
2624: }
2625: }
2626:
2627: # ------------------------------------------------------------- Declutters URLs
2628:
2629: sub declutter {
2630: my $thisfn=shift;
2631: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2632: $thisfn=~s/^\///;
2633: $thisfn=~s/^res\///;
2634: return $thisfn;
2635: }
2636:
2637: # -------------------------------------------------------- Escape Special Chars
2638:
2639: sub escape {
2640: my $str=shift;
2641: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2642: return $str;
2643: }
2644:
2645: # ----------------------------------------------------- Un-Escape Special Chars
2646:
2647: sub unescape {
2648: my $str=shift;
2649: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2650: return $str;
2651: }
2652:
2653: # ================================================================ Main Program
2654:
2655: sub goodbye {
2656: &flushcourselogs();
2657: &logthis("Shutting down");
2658: }
2659:
2660: BEGIN {
2661: # ------------------------------------------------------------ Read access.conf
2662: {
2663: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2664:
2665: while (my $configline=<$config>) {
2666: if ($configline =~ /PerlSetVar/) {
2667: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2668: chomp($varvalue);
2669: $perlvar{$varname}=$varvalue;
2670: }
2671: }
2672: }
2673:
2674: # ------------------------------------------------------------- Read hosts file
2675: {
2676: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2677:
2678: while (my $configline=<$config>) {
2679: chomp($configline);
2680: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2681: $hostname{$id}=$name;
2682: $hostdom{$id}=$domain;
2683: $hostip{$id}=$ip;
2684: if ($role eq 'library') { $libserv{$id}=$name; }
2685: }
2686: }
2687:
2688: # ------------------------------------------------------ Read spare server file
2689: {
2690: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2691:
2692: while (my $configline=<$config>) {
2693: chomp($configline);
2694: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2695: $spareid{$configline}=1;
2696: }
2697: }
2698: }
2699: # ------------------------------------------------------------ Read permissions
2700: {
2701: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2702:
2703: while (my $configline=<$config>) {
2704: chomp($configline);
2705: if ($configline) {
2706: my ($role,$perm)=split(/ /,$configline);
2707: if ($perm ne '') { $pr{$role}=$perm; }
2708: }
2709: }
2710: }
2711:
2712: # -------------------------------------------- Read plain texts for permissions
2713: {
2714: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2715:
2716: while (my $configline=<$config>) {
2717: chomp($configline);
2718: if ($configline) {
2719: my ($short,$plain)=split(/:/,$configline);
2720: if ($plain ne '') { $prp{$short}=$plain; }
2721: }
2722: }
2723: }
2724:
2725: # ---------------------------------------------------------- Read package table
2726: {
2727: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
2728:
2729: while (my $configline=<$config>) {
2730: chomp($configline);
2731: my ($short,$plain)=split(/:/,$configline);
2732: my ($pack,$name)=split(/\&/,$short);
2733: if ($plain ne '') {
2734: $packagetab{$pack.'&'.$name.'&name'}=$name;
2735: $packagetab{$short}=$plain;
2736: }
2737: }
2738: }
2739:
2740: # ------------------------------------------------------------- Read file types
2741: {
2742: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2743:
2744: while (my $configline=<$config>) {
2745: next if ($configline =~ /^\#/);
2746: chomp($configline);
2747: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2748: if ($descr[0] ne '') {
2749: $fe{$ending}=lc($emb);
2750: $fd{$ending}=join(' ',@descr);
2751: }
2752: }
2753: }
2754:
2755: %metacache=();
2756:
2757: $processmarker=$$.'_'.time.'_'.$perlvar{'lonHostID'};
2758: $dumpcount=0;
2759:
2760: &logtouch();
2761: &logthis('<font color=yellow>INFO: Read configuration</font>');
2762: }
2763:
2764: 1;
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