1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
5: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
6: # 11/8,11/16,11/18,11/22,11/23,12/22,
7: # 01/06,01/13,02/24,02/28,02/29,
8: # 03/01,03/02,03/06,03/07,03/13,
9: # 04/05,05/29,05/31,06/01,
10: # 06/05,06/26 Gerd Kortemeyer
11: # 06/26 Ben Tyszka
12: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
13: # 08/14 Ben Tyszka
14: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
15: # 10/04 Gerd Kortemeyer
16: # 10/04 Guy Albertelli
17: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
18: # 10/30,10/31,
19: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
20: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
21: # 05/01/01 Guy Albertelli
22: # 05/01,06/01,09/01 Gerd Kortemeyer
23: # 09/01 Guy Albertelli
24: # 09/01,10/01,11/01 Gerd Kortemeyer
25: # YEAR=2001
26: # 02/27/01 Scott Harrison
27: # 3/2 Gerd Kortemeyer
28: # 3/15,3/19 Scott Harrison
29: # 3/19,3/20 Gerd Kortemeyer
30: # 3/22,3/27,4/2,4/16,4/17 Scott Harrison
31: # 5/26,5/28 Gerd Kortemeyer
32: # 5/30 H. K. Ng
33: # 6/1 Gerd Kortemeyer
34: # July Guy Albertelli
35: # 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,
36: # 10/2 Gerd Kortemeyer
37: # 10/5,10/10,11/13,11/15 Scott Harrison
38: #
39: # $Id: lonnet.pm,v 1.171 2001/11/17 15:36:06 www Exp $
40: #
41: # 11/17 Gerd Kortemeyer
42: #
43: ###
44:
45: # Functions for use by content handlers:
46: #
47: # metadata_query(sql-query-string,custom-metadata-regex) :
48: # returns file handle of where sql and
49: # regex results will be stored for query
50: # plaintext(short) : plain text explanation of short term
51: # fileembstyle(ext) : embed style in page for file extension
52: # filedescription(ext) : descriptor text for file extension
53: # allowed(short,url) : returns codes for allowed actions
54: # F: full access
55: # U,I,K: authentication modes (cxx only)
56: # '': forbidden
57: # 1: user needs to choose course
58: # 2: browse allowed
59: # definerole(rolename,sys,dom,cou) : define a custom role rolename
60: # set privileges in format of lonTabs/roles.tab for
61: # system, domain and course level,
62: # assignrole(udom,uname,url,role,end,start) : give a role to a user for the
63: # level given by url. Optional start and end dates
64: # (leave empty string or zero for "no date")
65: # assigncustomrole (udom,uname,url,rdom,rnam,rolename,end,start) : give a
66: # custom role to a user for the level given by url.
67: # Specify name and domain of role author, and role name
68: # revokerole (udom,uname,url,role) : Revoke a role for url
69: # revokecustomrole (udom,uname,url,rdom,rnam,rolename) : Revoke a custom role
70: # appenv(hash) : adds hash to session environment
71: # delenv(varname) : deletes all environment entries starting with varname
72: # store(hashref,symb,courseid,udom,uname)
73: # : stores hash permanently for this url
74: # hashref needs to be given, and should be a \%hashname
75: # the remaining args aren't required and if they aren't
76: # passed or are '' they will be derived from the ENV
77: # cstore(hashref,symb,courseid,udom,uname)
78: # : same as store but uses the critical interface to
79: # guarentee a store
80: # restore(symb,courseid,udom,uname)
81: # : returns hash for this symb, all args are optional
82: # if they aren't given they will be derived from the
83: # current enviroment
84: #
85: #
86: # for the next 6 functions udom and uname are optional
87: # if supplied they use udom as the domain and uname
88: # as the username for the function (supply a courseid
89: # for the uname if you want a course database)
90: # if not supplied it uses %ENV and looks at
91: # user. attribute for the values
92: #
93: # eget(namesp,arrayref,udom,uname)
94: # : returns hash with keys from array reference filled
95: # in from namesp (encrypts the return communication)
96: # get(namesp,arrayref,udom,uname)
97: # : returns hash with keys from array reference filled
98: # in from namesp
99: # dump(namesp,udom,uname) : dumps the complete namespace into a hash
100: # del(namesp,array,udom,uname) : deletes keys out of array from namesp
101: # put(namesp,hash,udom,uname) : stores hash in namesp
102: # cput(namesp,hash,udom,uname) : critical put
103: #
104: #
105: # ssi(url,hash) : does a complete request cycle on url to localhost, posts
106: # hash
107: # coursedescription(id) : returns and caches course description for id
108: # repcopy(filename) : replicate file
109: # dirlist(url) : gets a directory listing
110: # directcondval(index) : reading condition value of single condition from
111: # state string
112: # condval(index) : value of condition index based on state
113: # EXT(name) : value of a variable
114: # symblist(map,hash) : Updates symbolic storage links
115: # symbread([filename]) : returns the data handle (filename optional)
116: # rndseed([symb,courseid,domain,uname])
117: # : returns a random seed, all arguments are optional,
118: # if they aren't sent it use the environment to derive
119: # them
120: # Note: if symb isn't sent and it can't get one from
121: # &symbread it will use the current time as it's return
122: # receipt() : returns a receipt to be given out to users
123: # getfile(filename) : returns the contents of filename, or a -1 if it can't
124: # be found, replicates and subscribes to the file
125: # filelocation(dir,file) : returns a fairly clean absolute reference to file
126: # from the directory dir
127: # hreflocation(dir,file) : same as filelocation, but for hrefs
128: # log(domain,user,home,msg) : write to permanent log for user
129: # usection(domain,user,courseid) : output of section name/number or '' for
130: # "not in course" and '-1' for "no section"
131: # userenvironment(domain,user,what) : puts out any environment parameter
132: # for a user
133: # idput(domain,hash) : writes IDs for users from hash (name=>id,name=>id)
134: # idget(domain,array): returns hash with usernames (id=>name,id=>name) for
135: # an array of IDs
136: # idrget(domain,array): returns hash with IDs for usernames (name=>id,...) for
137: # an array of names
138: # metadata(file,entry): returns the metadata entry for a file. entry='keys'
139: # returns a comma separated list of keys
140: #
141:
142: package Apache::lonnet;
143:
144: use strict;
145: use Apache::File;
146: use LWP::UserAgent();
147: use HTTP::Headers;
148: use vars
149: qw(%perlvar %hostname %homecache %hostip %spareid %hostdom %libserv %pr %prp %fe %fd $readit %metacache %packagetab %courselogs);
150: use IO::Socket;
151: use GDBM_File;
152: use Apache::Constants qw(:common :http);
153: use HTML::TokeParser;
154: use Fcntl qw(:flock);
155:
156: # --------------------------------------------------------------------- Logging
157:
158: sub logtouch {
159: my $execdir=$perlvar{'lonDaemons'};
160: unless (-e "$execdir/logs/lonnet.log") {
161: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
162: close $fh;
163: }
164: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
165: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
166: }
167:
168: sub logthis {
169: my $message=shift;
170: my $execdir=$perlvar{'lonDaemons'};
171: my $now=time;
172: my $local=localtime($now);
173: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
174: print $fh "$local ($$): $message\n";
175: return 1;
176: }
177:
178: sub logperm {
179: my $message=shift;
180: my $execdir=$perlvar{'lonDaemons'};
181: my $now=time;
182: my $local=localtime($now);
183: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
184: print $fh "$now:$message:$local\n";
185: return 1;
186: }
187:
188: # -------------------------------------------------- Non-critical communication
189: sub subreply {
190: my ($cmd,$server)=@_;
191: my $peerfile="$perlvar{'lonSockDir'}/$server";
192: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
193: Type => SOCK_STREAM,
194: Timeout => 10)
195: or return "con_lost";
196: print $client "$cmd\n";
197: my $answer=<$client>;
198: if (!$answer) { $answer="con_lost"; }
199: chomp($answer);
200: return $answer;
201: }
202:
203: sub reply {
204: my ($cmd,$server)=@_;
205: my $answer=subreply($cmd,$server);
206: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
207: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
208: &logthis("<font color=blue>WARNING:".
209: " $cmd to $server returned $answer</font>");
210: }
211: return $answer;
212: }
213:
214: # ----------------------------------------------------------- Send USR1 to lonc
215:
216: sub reconlonc {
217: my $peerfile=shift;
218: &logthis("Trying to reconnect for $peerfile");
219: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
220: if (my $fh=Apache::File->new("$loncfile")) {
221: my $loncpid=<$fh>;
222: chomp($loncpid);
223: if (kill 0 => $loncpid) {
224: &logthis("lonc at pid $loncpid responding, sending USR1");
225: kill USR1 => $loncpid;
226: sleep 1;
227: if (-e "$peerfile") { return; }
228: &logthis("$peerfile still not there, give it another try");
229: sleep 5;
230: if (-e "$peerfile") { return; }
231: &logthis(
232: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
233: } else {
234: &logthis(
235: "<font color=blue>WARNING:".
236: " lonc at pid $loncpid not responding, giving up</font>");
237: }
238: } else {
239: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
240: }
241: }
242:
243: # ------------------------------------------------------ Critical communication
244:
245: sub critical {
246: my ($cmd,$server)=@_;
247: unless ($hostname{$server}) {
248: &logthis("<font color=blue>WARNING:".
249: " Critical message to unknown server ($server)</font>");
250: return 'no_such_host';
251: }
252: my $answer=reply($cmd,$server);
253: if ($answer eq 'con_lost') {
254: my $pingreply=reply('ping',$server);
255: &reconlonc("$perlvar{'lonSockDir'}/$server");
256: my $pongreply=reply('pong',$server);
257: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
258: $answer=reply($cmd,$server);
259: if ($answer eq 'con_lost') {
260: my $now=time;
261: my $middlename=$cmd;
262: $middlename=substr($middlename,0,16);
263: $middlename=~s/\W//g;
264: my $dfilename=
265: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
266: {
267: my $dfh;
268: if ($dfh=Apache::File->new(">$dfilename")) {
269: print $dfh "$cmd\n";
270: }
271: }
272: sleep 2;
273: my $wcmd='';
274: {
275: my $dfh;
276: if ($dfh=Apache::File->new("$dfilename")) {
277: $wcmd=<$dfh>;
278: }
279: }
280: chomp($wcmd);
281: if ($wcmd eq $cmd) {
282: &logthis("<font color=blue>WARNING: ".
283: "Connection buffer $dfilename: $cmd</font>");
284: &logperm("D:$server:$cmd");
285: return 'con_delayed';
286: } else {
287: &logthis("<font color=red>CRITICAL:"
288: ." Critical connection failed: $server $cmd</font>");
289: &logperm("F:$server:$cmd");
290: return 'con_failed';
291: }
292: }
293: }
294: return $answer;
295: }
296:
297: # ---------------------------------------------------------- Append Environment
298:
299: sub appenv {
300: my %newenv=@_;
301: map {
302: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
303: &logthis("<font color=blue>WARNING: ".
304: "Attempt to modify environment ".$_." to ".$newenv{$_}
305: .'</font>');
306: delete($newenv{$_});
307: } else {
308: $ENV{$_}=$newenv{$_};
309: }
310: } keys %newenv;
311:
312: my $lockfh;
313: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
314: return 'error: '.$!;
315: }
316: unless (flock($lockfh,LOCK_EX)) {
317: &logthis("<font color=blue>WARNING: ".
318: 'Could not obtain exclusive lock in appenv: '.$!);
319: $lockfh->close();
320: return 'error: '.$!;
321: }
322:
323: my @oldenv;
324: {
325: my $fh;
326: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
327: return 'error: '.$!;
328: }
329: @oldenv=<$fh>;
330: $fh->close();
331: }
332: for (my $i=0; $i<=$#oldenv; $i++) {
333: chomp($oldenv[$i]);
334: if ($oldenv[$i] ne '') {
335: my ($name,$value)=split(/=/,$oldenv[$i]);
336: unless (defined($newenv{$name})) {
337: $newenv{$name}=$value;
338: }
339: }
340: }
341: {
342: my $fh;
343: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
344: return 'error';
345: }
346: my $newname;
347: foreach $newname (keys %newenv) {
348: print $fh "$newname=$newenv{$newname}\n";
349: }
350: $fh->close();
351: }
352:
353: $lockfh->close();
354: return 'ok';
355: }
356: # ----------------------------------------------------- Delete from Environment
357:
358: sub delenv {
359: my $delthis=shift;
360: my %newenv=();
361: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
362: &logthis("<font color=blue>WARNING: ".
363: "Attempt to delete from environment ".$delthis);
364: return 'error';
365: }
366: my @oldenv;
367: {
368: my $fh;
369: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
370: return 'error';
371: }
372: unless (flock($fh,LOCK_SH)) {
373: &logthis("<font color=blue>WARNING: ".
374: 'Could not obtain shared lock in delenv: '.$!);
375: $fh->close();
376: return 'error: '.$!;
377: }
378: @oldenv=<$fh>;
379: $fh->close();
380: }
381: {
382: my $fh;
383: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
384: return 'error';
385: }
386: unless (flock($fh,LOCK_EX)) {
387: &logthis("<font color=blue>WARNING: ".
388: 'Could not obtain exclusive lock in delenv: '.$!);
389: $fh->close();
390: return 'error: '.$!;
391: }
392: map {
393: unless ($_=~/^$delthis/) { print $fh $_; }
394: } @oldenv;
395: $fh->close();
396: }
397: return 'ok';
398: }
399:
400: # ------------------------------ Find server with least workload from spare.tab
401:
402: sub spareserver {
403: my $tryserver;
404: my $spareserver='';
405: my $lowestserver=100;
406: foreach $tryserver (keys %spareid) {
407: my $answer=reply('load',$tryserver);
408: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
409: $spareserver="http://$hostname{$tryserver}";
410: $lowestserver=$answer;
411: }
412: }
413: return $spareserver;
414: }
415:
416: # ----------------------- Try to determine user's current authentication scheme
417:
418: sub queryauthenticate {
419: my ($uname,$udom)=@_;
420: if (($perlvar{'lonRole'} eq 'library') &&
421: ($udom eq $perlvar{'lonDefDomain'})) {
422: my $answer=reply("encrypt:currentauth:$udom:$uname",
423: $perlvar{'lonHostID'});
424: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
425: if (length($answer)) {
426: return $answer;
427: }
428: else {
429: &logthis("User $uname at $udom lacks an authentication mechanism");
430: return 'no_host';
431: }
432: }
433: }
434:
435: my $tryserver;
436: foreach $tryserver (keys %libserv) {
437: if ($hostdom{$tryserver} eq $udom) {
438: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
439: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
440: if (length($answer)) {
441: return $answer;
442: }
443: else {
444: &logthis("User $uname at $udom lacks an authentication mechanism");
445: return 'no_host';
446: }
447: }
448: }
449: }
450: &logthis("User $uname at $udom lacks an authentication mechanism");
451: return 'no_host';
452: }
453:
454: # --------- Try to authenticate user from domain's lib servers (first this one)
455:
456: sub authenticate {
457: my ($uname,$upass,$udom)=@_;
458: $upass=escape($upass);
459: if (($perlvar{'lonRole'} eq 'library') &&
460: ($udom eq $perlvar{'lonDefDomain'})) {
461: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
462: if ($answer =~ /authorized/) {
463: if ($answer eq 'authorized') {
464: &logthis("User $uname at $udom authorized by local server");
465: return $perlvar{'lonHostID'};
466: }
467: if ($answer eq 'non_authorized') {
468: &logthis("User $uname at $udom rejected by local server");
469: return 'no_host';
470: }
471: }
472: }
473:
474: my $tryserver;
475: foreach $tryserver (keys %libserv) {
476: if ($hostdom{$tryserver} eq $udom) {
477: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
478: if ($answer =~ /authorized/) {
479: if ($answer eq 'authorized') {
480: &logthis("User $uname at $udom authorized by $tryserver");
481: return $tryserver;
482: }
483: if ($answer eq 'non_authorized') {
484: &logthis("User $uname at $udom rejected by $tryserver");
485: return 'no_host';
486: }
487: }
488: }
489: }
490: &logthis("User $uname at $udom could not be authenticated");
491: return 'no_host';
492: }
493:
494: # ---------------------- Find the homebase for a user from domain's lib servers
495:
496: sub homeserver {
497: my ($uname,$udom)=@_;
498:
499: my $index="$uname:$udom";
500: if ($homecache{$index}) { return "$homecache{$index}"; }
501:
502: my $tryserver;
503: foreach $tryserver (keys %libserv) {
504: if ($hostdom{$tryserver} eq $udom) {
505: my $answer=reply("home:$udom:$uname",$tryserver);
506: if ($answer eq 'found') {
507: $homecache{$index}=$tryserver;
508: return $tryserver;
509: }
510: }
511: }
512: return 'no_host';
513: }
514:
515: # ------------------------------------- Find the usernames behind a list of IDs
516:
517: sub idget {
518: my ($udom,@ids)=@_;
519: my %returnhash=();
520:
521: my $tryserver;
522: foreach $tryserver (keys %libserv) {
523: if ($hostdom{$tryserver} eq $udom) {
524: my $idlist=join('&',@ids);
525: $idlist=~tr/A-Z/a-z/;
526: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
527: my @answer=();
528: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
529: @answer=split(/\&/,$reply);
530: } ;
531: my $i;
532: for ($i=0;$i<=$#ids;$i++) {
533: if ($answer[$i]) {
534: $returnhash{$ids[$i]}=$answer[$i];
535: }
536: }
537: }
538: }
539: return %returnhash;
540: }
541:
542: # ------------------------------------- Find the IDs behind a list of usernames
543:
544: sub idrget {
545: my ($udom,@unames)=@_;
546: my %returnhash=();
547: map {
548: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
549: } @unames;
550: return %returnhash;
551: }
552:
553: # ------------------------------- Store away a list of names and associated IDs
554:
555: sub idput {
556: my ($udom,%ids)=@_;
557: my %servers=();
558: map {
559: my $uhom=&homeserver($_,$udom);
560: if ($uhom ne 'no_host') {
561: my $id=&escape($ids{$_});
562: $id=~tr/A-Z/a-z/;
563: my $unam=&escape($_);
564: if ($servers{$uhom}) {
565: $servers{$uhom}.='&'.$id.'='.$unam;
566: } else {
567: $servers{$uhom}=$id.'='.$unam;
568: }
569: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
570: }
571: } keys %ids;
572: map {
573: &critical('idput:'.$udom.':'.$servers{$_},$_);
574: } keys %servers;
575: }
576:
577: # ------------------------------------- Find the section of student in a course
578:
579: sub usection {
580: my ($udom,$unam,$courseid)=@_;
581: $courseid=~s/\_/\//g;
582: $courseid=~s/^(\w)/\/$1/;
583: map {
584: my ($key,$value)=split(/\=/,$_);
585: $key=&unescape($key);
586: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
587: my $section=$1;
588: if ($key eq $courseid.'_st') { $section=''; }
589: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
590: my $now=time;
591: my $notactive=0;
592: if ($start) {
593: if ($now<$start) { $notactive=1; }
594: }
595: if ($end) {
596: if ($now>$end) { $notactive=1; }
597: }
598: unless ($notactive) { return $section; }
599: }
600: } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
601: &homeserver($unam,$udom)));
602: return '-1';
603: }
604:
605: # ------------------------------------- Read an entry from a user's environment
606:
607: sub userenvironment {
608: my ($udom,$unam,@what)=@_;
609: my %returnhash=();
610: my @answer=split(/\&/,
611: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
612: &homeserver($unam,$udom)));
613: my $i;
614: for ($i=0;$i<=$#what;$i++) {
615: $returnhash{$what[$i]}=&unescape($answer[$i]);
616: }
617: return %returnhash;
618: }
619:
620: # ----------------------------- Subscribe to a resource, return URL if possible
621:
622: sub subscribe {
623: my $fname=shift;
624: my $author=$fname;
625: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
626: my ($udom,$uname)=split(/\//,$author);
627: my $home=homeserver($uname,$udom);
628: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
629: return 'not_found';
630: }
631: my $answer=reply("sub:$fname",$home);
632: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
633: $answer.=' by '.$home;
634: }
635: return $answer;
636: }
637:
638: # -------------------------------------------------------------- Replicate file
639:
640: sub repcopy {
641: my $filename=shift;
642: $filename=~s/\/+/\//g;
643: my $transname="$filename.in.transfer";
644: if ((-e $filename) || (-e $transname)) { return OK; }
645: my $remoteurl=subscribe($filename);
646: if ($remoteurl =~ /^con_lost by/) {
647: &logthis("Subscribe returned $remoteurl: $filename");
648: return HTTP_SERVICE_UNAVAILABLE;
649: } elsif ($remoteurl eq 'not_found') {
650: &logthis("Subscribe returned not_found: $filename");
651: return HTTP_NOT_FOUND;
652: } elsif ($remoteurl =~ /^rejected by/) {
653: &logthis("Subscribe returned $remoteurl: $filename");
654: return FORBIDDEN;
655: } elsif ($remoteurl eq 'directory') {
656: return OK;
657: } else {
658: my @parts=split(/\//,$filename);
659: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
660: if ($path ne "$perlvar{'lonDocRoot'}/res") {
661: &logthis("Malconfiguration for replication: $filename");
662: return HTTP_BAD_REQUEST;
663: }
664: my $count;
665: for ($count=5;$count<$#parts;$count++) {
666: $path.="/$parts[$count]";
667: if ((-e $path)!=1) {
668: mkdir($path,0777);
669: }
670: }
671: my $ua=new LWP::UserAgent;
672: my $request=new HTTP::Request('GET',"$remoteurl");
673: my $response=$ua->request($request,$transname);
674: if ($response->is_error()) {
675: unlink($transname);
676: my $message=$response->status_line;
677: &logthis("<font color=blue>WARNING:"
678: ." LWP get: $message: $filename</font>");
679: return HTTP_SERVICE_UNAVAILABLE;
680: } else {
681: if ($remoteurl!~/\.meta$/) {
682: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
683: my $mresponse=$ua->request($mrequest,$filename.'.meta');
684: if ($mresponse->is_error()) {
685: unlink($filename.'.meta');
686: &logthis(
687: "<font color=yellow>INFO: No metadata: $filename</font>");
688: }
689: }
690: rename($transname,$filename);
691: return OK;
692: }
693: }
694: }
695:
696: # --------------------------------------------------------- Server Side Include
697:
698: sub ssi {
699:
700: my ($fn,%form)=@_;
701:
702: my $ua=new LWP::UserAgent;
703:
704: my $request;
705:
706: if (%form) {
707: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
708: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
709: } else {
710: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
711: }
712:
713: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
714: my $response=$ua->request($request);
715:
716: return $response->content;
717: }
718:
719: # ------------------------------------------------------------------------- Log
720:
721: sub log {
722: my ($dom,$nam,$hom,$what)=@_;
723: return critical("log:$dom:$nam:$what",$hom);
724: }
725:
726: # ------------------------------------------------------------------ Course Log
727:
728: sub flushcourselogs {
729: &logthis('Flushing course log buffers');
730: map {
731: my $crsid=$_;
732: if (&reply('log:'.$ENV{'course.'.$crsid.'.domain'}.':'.
733: $ENV{'course.'.$crsid.'.num'}.':'.
734: &escape($courselogs{$crsid}),
735: $ENV{'course.'.$crsid.'.home'}) eq 'ok') {
736: delete $courselogs{$crsid};
737: } else {
738: &logthis('Failed to flush log buffer for '.$crsid);
739: if (length($courselogs{$crsid})>40000) {
740: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
741: " exceeded maximum size, deleting.</font>");
742: delete $courselogs{$crsid};
743: }
744: }
745: } keys %courselogs;
746: }
747:
748: sub courselog {
749: my $what=shift;
750: $what=time.':'.$what;
751: unless ($ENV{'request.course.id'}) { return ''; }
752: if (defined $courselogs{$ENV{'request.course.id'}}) {
753: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
754: } else {
755: $courselogs{$ENV{'request.course.id'}}.=$what;
756: }
757: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
758: &flushcourselogs();
759: }
760: }
761:
762: sub courseacclog {
763: my $fnsymb=shift;
764: unless ($ENV{'request.course.id'}) { return ''; }
765: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
766: if ($what=~/(problem|exam|quiz|assess|survey|form)$/) {
767: map {
768: if ($_=~/^form\.(.*)/) {
769: $what.=':'.$1.'='.$ENV{$_};
770: }
771: } keys %ENV;
772: }
773: &courselog($what);
774: }
775:
776: # ----------------------------------------------------------- Check out an item
777:
778: sub checkout {
779: my ($symb,$tuname,$tudom,$tcrsid)=@_;
780: my $now=time;
781: my $lonhost=$perlvar{'lonHostID'};
782: my $infostr=&escape(
783: $tuname.'&'.
784: $tudom.'&'.
785: $tcrsid.'&'.
786: $symb.'&'.
787: $now.'&'.$ENV{'REMOTE_ADDR'});
788: my $token=&reply('tmpput:'.$infostr,$lonhost);
789: if ($token=~/^error\:/) {
790: &logthis("<font color=blue>WARNING: ".
791: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
792: "</font>");
793: return '';
794: }
795:
796: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
797: $token=~tr/a-z/A-Z/;
798:
799: my %infohash=('resource.0.outtoken' => $token,
800: 'resource.0.checkouttime' => $now,
801: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
802:
803: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
804: return '';
805: } else {
806: &logthis("<font color=blue>WARNING: ".
807: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
808: "</font>");
809: }
810:
811: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
812: &escape('Checkout '.$infostr.' - '.
813: $token)) ne 'ok') {
814: return '';
815: } else {
816: &logthis("<font color=blue>WARNING: ".
817: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
818: "</font>");
819: }
820: return $token;
821: }
822:
823: # ------------------------------------------------------------ Check in an item
824:
825: sub checkin {
826: my $token=shift;
827: my $now=time;
828: my ($ta,$tb,$lonhost)=split(/\*/,$token);
829: $lonhost=~tr/A-Z/a-z/;
830: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
831: $dtoken=~s/\W/\_/g;
832: my ($tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
833: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
834:
835: unless (($tuname) && ($tudom)) {
836: &logthis('Check in '.$token.' ('.$dtoken.') failed');
837: return '';
838: }
839:
840: unless (&allowed('mgr',$tcrsid)) {
841: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
842: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
843: return '';
844: }
845:
846: my %infohash=('resource.0.intoken' => $token,
847: 'resource.0.checkintime' => $now,
848: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
849:
850: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
851: return '';
852: }
853:
854: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
855: &escape('Checkin - '.$token)) ne 'ok') {
856: return '';
857: }
858:
859: return ($symb,$tuname,$tudom,$tcrsid);
860: }
861:
862: # --------------------------------------------- Set Expire Date for Spreadsheet
863:
864: sub expirespread {
865: my ($uname,$udom,$stype,$usymb)=@_;
866: my $cid=$ENV{'request.course.id'};
867: if ($cid) {
868: my $now=time;
869: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
870: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
871: $ENV{'course.'.$cid.'.num'}.
872: ':nohist_expirationdates:'.
873: &escape($key).'='.$now,
874: $ENV{'course.'.$cid.'.home'})
875: }
876: return 'ok';
877: }
878:
879: # ----------------------------------------------------- Devalidate Spreadsheets
880:
881: sub devalidate {
882: my $symb=shift;
883: my $cid=$ENV{'request.course.id'};
884: if ($cid) {
885: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
886: my $status=
887: &del('nohist_calculatedsheet',
888: [$key.'studentcalc'],
889: $ENV{'course.'.$cid.'.domain'},
890: $ENV{'course.'.$cid.'.num'})
891: .' '.
892: &del('nohist_calculatedsheets_'.$cid,
893: [$key.'assesscalc:'.$symb]);
894: unless ($status eq 'ok ok') {
895: &logthis('Could not devalidate spreadsheet '.
896: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
897: $symb.': '.$status);
898: }
899: }
900: }
901:
902: sub hash2str {
903: my (%hash)=@_;
904: my $result='';
905: map { $result.=escape($_).'='.escape($hash{$_}).'&'; } keys %hash;
906: $result=~s/\&$//;
907: return $result;
908: }
909:
910: sub str2hash {
911: my ($string) = @_;
912: my %returnhash;
913: map {
914: my ($name,$value)=split(/\=/,$_);
915: $returnhash{&unescape($name)}=&unescape($value);
916: } split(/\&/,$string);
917: return %returnhash;
918: }
919:
920: # -------------------------------------------------------------------Temp Store
921:
922: sub tmpreset {
923: my ($symb,$namespace,$domain,$stuname) = @_;
924: if (!$symb) {
925: $symb=&symbread();
926: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
927: }
928: $symb=escape($symb);
929:
930: if (!$namespace) { $namespace=$ENV{'request.state'}; }
931: $namespace=~s/\//\_/g;
932: $namespace=~s/\W//g;
933:
934: #FIXME needs to do something for /pub resources
935: if (!$domain) { $domain=$ENV{'user.domain'}; }
936: if (!$stuname) { $stuname=$ENV{'user.name'}; }
937: my $path=$perlvar{'lonDaemons'}.'/tmp';
938: my %hash;
939: if (tie(%hash,'GDBM_File',
940: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
941: &GDBM_WRCREAT,0640)) {
942: foreach my $key (keys %hash) {
943: if ($key=~ /:$symb:/) {
944: delete($hash{$key});
945: }
946: }
947: }
948: }
949:
950: sub tmpstore {
951: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
952:
953: if (!$symb) {
954: $symb=&symbread();
955: if (!$symb) { $symb= $ENV{'request.url'}; }
956: }
957: $symb=escape($symb);
958:
959: if (!$namespace) {
960: # I don't think we would ever want to store this for a course.
961: # it seems this will only be used if we don't have a course.
962: #$namespace=$ENV{'request.course.id'};
963: #if (!$namespace) {
964: $namespace=$ENV{'request.state'};
965: #}
966: }
967: $namespace=~s/\//\_/g;
968: $namespace=~s/\W//g;
969: #FIXME needs to do something for /pub resources
970: if (!$domain) { $domain=$ENV{'user.domain'}; }
971: if (!$stuname) { $stuname=$ENV{'user.name'}; }
972: my $now=time;
973: my %hash;
974: my $path=$perlvar{'lonDaemons'}.'/tmp';
975: if (tie(%hash,'GDBM_File',
976: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
977: &GDBM_WRCREAT,0640)) {
978: $hash{"version:$symb"}++;
979: my $version=$hash{"version:$symb"};
980: my $allkeys='';
981: foreach my $key (keys(%$storehash)) {
982: $allkeys.=$key.':';
983: $hash{"$version:$symb:$key"}=$$storehash{$key};
984: }
985: $hash{"$version:$symb:timestamp"}=$now;
986: $allkeys.='timestamp';
987: $hash{"$version:keys:$symb"}=$allkeys;
988: if (untie(%hash)) {
989: return 'ok';
990: } else {
991: return "error:$!";
992: }
993: } else {
994: return "error:$!";
995: }
996: }
997:
998: # -----------------------------------------------------------------Temp Restore
999:
1000: sub tmprestore {
1001: my ($symb,$namespace,$domain,$stuname) = @_;
1002:
1003: if (!$symb) {
1004: $symb=&symbread();
1005: if (!$symb) { $symb= $ENV{'request.url'}; }
1006: }
1007: $symb=escape($symb);
1008:
1009: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1010: #FIXME needs to do something for /pub resources
1011: if (!$domain) { $domain=$ENV{'user.domain'}; }
1012: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1013:
1014: my %returnhash;
1015: $namespace=~s/\//\_/g;
1016: $namespace=~s/\W//g;
1017: my %hash;
1018: my $path=$perlvar{'lonDaemons'}.'/tmp';
1019: if (tie(%hash,'GDBM_File',
1020: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1021: &GDBM_READER,0640)) {
1022: my $version=$hash{"version:$symb"};
1023: $returnhash{'version'}=$version;
1024: my $scope;
1025: for ($scope=1;$scope<=$version;$scope++) {
1026: my $vkeys=$hash{"$scope:keys:$symb"};
1027: my @keys=split(/:/,$vkeys);
1028: my $key;
1029: $returnhash{"$scope:keys"}=$vkeys;
1030: foreach $key (@keys) {
1031: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1032: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1033: }
1034: }
1035: if (!(untie(%hash))) {
1036: return "error:$!";
1037: }
1038: } else {
1039: return "error:$!";
1040: }
1041: return %returnhash;
1042: }
1043:
1044: # ----------------------------------------------------------------------- Store
1045:
1046: sub store {
1047: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1048: my $home='';
1049:
1050: if ($stuname) { $home=&homeserver($stuname,$domain); }
1051:
1052: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1053:
1054: &devalidate($symb);
1055:
1056: $symb=escape($symb);
1057: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
1058: if (!$domain) { $domain=$ENV{'user.domain'}; }
1059: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1060: if (!$home) { $home=$ENV{'user.home'}; }
1061: my $namevalue='';
1062: map {
1063: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1064: } keys %$storehash;
1065: $namevalue=~s/\&$//;
1066: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1067: }
1068:
1069: # -------------------------------------------------------------- Critical Store
1070:
1071: sub cstore {
1072: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1073: my $home='';
1074:
1075: if ($stuname) { $home=&homeserver($stuname,$domain); }
1076:
1077: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1078:
1079: &devalidate($symb);
1080:
1081: $symb=escape($symb);
1082: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
1083: if (!$domain) { $domain=$ENV{'user.domain'}; }
1084: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1085: if (!$home) { $home=$ENV{'user.home'}; }
1086:
1087: my $namevalue='';
1088: map {
1089: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1090: } keys %$storehash;
1091: $namevalue=~s/\&$//;
1092: return critical("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1093: }
1094:
1095: # --------------------------------------------------------------------- Restore
1096:
1097: sub restore {
1098: my ($symb,$namespace,$domain,$stuname) = @_;
1099: my $home='';
1100:
1101: if ($stuname) { $home=&homeserver($stuname,$domain); }
1102:
1103: if (!$symb) {
1104: unless ($symb=escape(&symbread())) { return ''; }
1105: } else {
1106: $symb=&escape($symb);
1107: }
1108: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
1109: if (!$domain) { $domain=$ENV{'user.domain'}; }
1110: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1111: if (!$home) { $home=$ENV{'user.home'}; }
1112: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1113:
1114: my %returnhash=();
1115: map {
1116: my ($name,$value)=split(/\=/,$_);
1117: $returnhash{&unescape($name)}=&unescape($value);
1118: } split(/\&/,$answer);
1119: my $version;
1120: for ($version=1;$version<=$returnhash{'version'};$version++) {
1121: map {
1122: $returnhash{$_}=$returnhash{$version.':'.$_};
1123: } split(/\:/,$returnhash{$version.':keys'});
1124: }
1125: return %returnhash;
1126: }
1127:
1128: # ---------------------------------------------------------- Course Description
1129:
1130: sub coursedescription {
1131: my $courseid=shift;
1132: $courseid=~s/^\///;
1133: $courseid=~s/\_/\//g;
1134: my ($cdomain,$cnum)=split(/\//,$courseid);
1135: my $chome=&homeserver($cnum,$cdomain);
1136: if ($chome ne 'no_host') {
1137: my %returnhash=&dump('environment',$cdomain,$cnum);
1138: if (!exists($returnhash{'con_lost'})) {
1139: my $normalid=$cdomain.'_'.$cnum;
1140: my %envhash=();
1141: $returnhash{'home'}= $chome;
1142: $returnhash{'domain'} = $cdomain;
1143: $returnhash{'num'} = $cnum;
1144: while (my ($name,$value) = each %returnhash) {
1145: $envhash{'course.'.$normalid.'.'.$name}=$value;
1146: }
1147: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
1148: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1149: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1150: $envhash{'course.'.$normalid.'.last_cache'}=time;
1151: $envhash{'course.'.$normalid.'.home'}=$chome;
1152: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1153: $envhash{'course.'.$normalid.'.num'}=$cnum;
1154: &appenv(%envhash);
1155: return %returnhash;
1156: }
1157: }
1158: return ();
1159: }
1160:
1161: # -------------------------------------------------------- Get user privileges
1162:
1163: sub rolesinit {
1164: my ($domain,$username,$authhost)=@_;
1165: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1166: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1167: my %allroles=();
1168: my %thesepriv=();
1169: my $now=time;
1170: my $userroles="user.login.time=$now\n";
1171: my $thesestr;
1172:
1173: if ($rolesdump ne '') {
1174: map {
1175: if ($_!~/^rolesdef\&/) {
1176: my ($area,$role)=split(/=/,$_);
1177: $area=~s/\_\w\w$//;
1178: my ($trole,$tend,$tstart)=split(/_/,$role);
1179: $userroles.='user.role.'.$trole.'.'.$area.'='.
1180: $tstart.'.'.$tend."\n";
1181: if ($tend!=0) {
1182: if ($tend<$now) {
1183: $trole='';
1184: }
1185: }
1186: if ($tstart!=0) {
1187: if ($tstart>$now) {
1188: $trole='';
1189: }
1190: }
1191: if (($area ne '') && ($trole ne '')) {
1192: my $spec=$trole.'.'.$area;
1193: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1194: if ($trole =~ /^cr\//) {
1195: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1196: my $homsvr=homeserver($rauthor,$rdomain);
1197: if ($hostname{$homsvr} ne '') {
1198: my $roledef=
1199: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1200: $homsvr);
1201: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1202: my ($syspriv,$dompriv,$coursepriv)=
1203: split(/\_/,unescape($roledef));
1204: $allroles{'cm./'}.=':'.$syspriv;
1205: $allroles{$spec.'./'}.=':'.$syspriv;
1206: if ($tdomain ne '') {
1207: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1208: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1209: if ($trest ne '') {
1210: $allroles{'cm.'.$area}.=':'.$coursepriv;
1211: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1212: }
1213: }
1214: }
1215: }
1216: } else {
1217: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1218: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1219: if ($tdomain ne '') {
1220: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1221: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1222: if ($trest ne '') {
1223: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1224: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1225: }
1226: }
1227: }
1228: }
1229: }
1230: } split(/&/,$rolesdump);
1231: my $adv=0;
1232: my $author=0;
1233: map {
1234: %thesepriv=();
1235: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1236: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1237: map {
1238: if ($_ ne '') {
1239: my ($privilege,$restrictions)=split(/&/,$_);
1240: if ($restrictions eq '') {
1241: $thesepriv{$privilege}='F';
1242: } else {
1243: if ($thesepriv{$privilege} ne 'F') {
1244: $thesepriv{$privilege}.=$restrictions;
1245: }
1246: }
1247: }
1248: } split(/:/,$allroles{$_});
1249: $thesestr='';
1250: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
1251: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1252: } keys %allroles;
1253: $userroles.='user.adv='.$adv."\n".
1254: 'user.author='.$author."\n";
1255: $ENV{'user.adv'}=$adv;
1256: }
1257: return $userroles;
1258: }
1259:
1260: # --------------------------------------------------------------- get interface
1261:
1262: sub get {
1263: my ($namespace,$storearr,$udomain,$uname)=@_;
1264: my $items='';
1265: map {
1266: $items.=escape($_).'&';
1267: } @$storearr;
1268: $items=~s/\&$//;
1269: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1270: if (!$uname) { $uname=$ENV{'user.name'}; }
1271: my $uhome=&homeserver($uname,$udomain);
1272:
1273: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1274: my @pairs=split(/\&/,$rep);
1275: my %returnhash=();
1276: my $i=0;
1277: map {
1278: $returnhash{$_}=unescape($pairs[$i]);
1279: $i++;
1280: } @$storearr;
1281: return %returnhash;
1282: }
1283:
1284: # --------------------------------------------------------------- del interface
1285:
1286: sub del {
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,$udomain);
1296:
1297: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1298: }
1299:
1300: # -------------------------------------------------------------- dump interface
1301:
1302: sub dump {
1303: my ($namespace,$udomain,$uname)=@_;
1304: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1305: if (!$uname) { $uname=$ENV{'user.name'}; }
1306: my $uhome=&homeserver($uname,$udomain);
1307: my $rep=reply("dump:$udomain:$uname:$namespace",$uhome);
1308: my @pairs=split(/\&/,$rep);
1309: my %returnhash=();
1310: map {
1311: my ($key,$value)=split(/=/,$_);
1312: $returnhash{unescape($key)}=unescape($value);
1313: } @pairs;
1314: return %returnhash;
1315: }
1316:
1317: # --------------------------------------------------------------- put interface
1318:
1319: sub put {
1320: my ($namespace,$storehash,$udomain,$uname)=@_;
1321: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1322: if (!$uname) { $uname=$ENV{'user.name'}; }
1323: my $uhome=&homeserver($uname,$udomain);
1324: my $items='';
1325: map {
1326: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1327: } keys %$storehash;
1328: $items=~s/\&$//;
1329: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1330: }
1331:
1332: # ------------------------------------------------------ critical put interface
1333:
1334: sub cput {
1335: my ($namespace,$storehash,$udomain,$uname)=@_;
1336: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1337: if (!$uname) { $uname=$ENV{'user.name'}; }
1338: my $uhome=&homeserver($uname,$udomain);
1339: my $items='';
1340: map {
1341: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1342: } keys %$storehash;
1343: $items=~s/\&$//;
1344: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1345: }
1346:
1347: # -------------------------------------------------------------- eget interface
1348:
1349: sub eget {
1350: my ($namespace,$storearr,$udomain,$uname)=@_;
1351: my $items='';
1352: map {
1353: $items.=escape($_).'&';
1354: } @$storearr;
1355: $items=~s/\&$//;
1356: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1357: if (!$uname) { $uname=$ENV{'user.name'}; }
1358: my $uhome=&homeserver($uname,$udomain);
1359: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1360: my @pairs=split(/\&/,$rep);
1361: my %returnhash=();
1362: my $i=0;
1363: map {
1364: $returnhash{$_}=unescape($pairs[$i]);
1365: $i++;
1366: } @$storearr;
1367: return %returnhash;
1368: }
1369:
1370: # ------------------------------------------------- Check for a user privilege
1371:
1372: sub allowed {
1373: my ($priv,$uri)=@_;
1374:
1375: my $orguri=$uri;
1376: $uri=&declutter($uri);
1377:
1378: # Free bre access to adm and meta resources
1379:
1380: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1381: return 'F';
1382: }
1383:
1384: # Free bre to public access
1385:
1386: if ($priv eq 'bre') {
1387: if (&metadata($uri,'copyright') eq 'public') { return 'F'; }
1388: }
1389:
1390: my $thisallowed='';
1391: my $statecond=0;
1392: my $courseprivid='';
1393:
1394: # Course
1395:
1396: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1397: $thisallowed.=$1;
1398: }
1399:
1400: # Domain
1401:
1402: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1403: =~/$priv\&([^\:]*)/) {
1404: $thisallowed.=$1;
1405: }
1406:
1407: # Course: uri itself is a course
1408: my $courseuri=$uri;
1409: $courseuri=~s/\_(\d)/\/$1/;
1410: $courseuri=~s/^([^\/])/\/$1/;
1411:
1412: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1413: =~/$priv\&([^\:]*)/) {
1414: $thisallowed.=$1;
1415: }
1416:
1417: # Full access at system, domain or course-wide level? Exit.
1418:
1419: if ($thisallowed=~/F/) {
1420: return 'F';
1421: }
1422:
1423: # If this is generating or modifying users, exit with special codes
1424:
1425: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1426: return $thisallowed;
1427: }
1428: #
1429: # Gathered so far: system, domain and course wide privileges
1430: #
1431: # Course: See if uri or referer is an individual resource that is part of
1432: # the course
1433:
1434: if ($ENV{'request.course.id'}) {
1435: $courseprivid=$ENV{'request.course.id'};
1436: if ($ENV{'request.course.sec'}) {
1437: $courseprivid.='/'.$ENV{'request.course.sec'};
1438: }
1439: $courseprivid=~s/\_/\//;
1440: my $checkreferer=1;
1441: my @uriparts=split(/\//,$uri);
1442: my $filename=$uriparts[$#uriparts];
1443: my $pathname=$uri;
1444: $pathname=~s/\/$filename$//;
1445: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1446: /\&$filename\:([\d\|]+)\&/) {
1447: $statecond=$1;
1448: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1449: =~/$priv\&([^\:]*)/) {
1450: $thisallowed.=$1;
1451: $checkreferer=0;
1452: }
1453: }
1454:
1455: if ($checkreferer) {
1456: my $refuri=$ENV{'httpref.'.$orguri};
1457:
1458: unless ($refuri) {
1459: map {
1460: if ($_=~/^httpref\..*\*/) {
1461: my $pattern=$_;
1462: $pattern=~s/^httpref\.\/res\///;
1463: $pattern=~s/\*/\[\^\/\]\+/g;
1464: $pattern=~s/\//\\\//g;
1465: if ($orguri=~/$pattern/) {
1466: $refuri=$ENV{$_};
1467: }
1468: }
1469: } keys %ENV;
1470: }
1471: if ($refuri) {
1472: $refuri=&declutter($refuri);
1473: my @uriparts=split(/\//,$refuri);
1474: my $filename=$uriparts[$#uriparts];
1475: my $pathname=$refuri;
1476: $pathname=~s/\/$filename$//;
1477: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1478: /\&$filename\:([\d\|]+)\&/) {
1479: my $refstatecond=$1;
1480: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1481: =~/$priv\&([^\:]*)/) {
1482: $thisallowed.=$1;
1483: $uri=$refuri;
1484: $statecond=$refstatecond;
1485: }
1486: }
1487: }
1488: }
1489: }
1490:
1491: #
1492: # Gathered now: all privileges that could apply, and condition number
1493: #
1494: #
1495: # Full or no access?
1496: #
1497:
1498: if ($thisallowed=~/F/) {
1499: return 'F';
1500: }
1501:
1502: unless ($thisallowed) {
1503: return '';
1504: }
1505:
1506: # Restrictions exist, deal with them
1507: #
1508: # C:according to course preferences
1509: # R:according to resource settings
1510: # L:unless locked
1511: # X:according to user session state
1512: #
1513:
1514: # Possibly locked functionality, check all courses
1515: # Locks might take effect only after 10 minutes cache expiration for other
1516: # courses, and 2 minutes for current course
1517:
1518: my $envkey;
1519: if ($thisallowed=~/L/) {
1520: foreach $envkey (keys %ENV) {
1521: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1522: my $courseid=$2;
1523: my $roleid=$1.'.'.$2;
1524: $courseid=~s/^\///;
1525: my $expiretime=600;
1526: if ($ENV{'request.role'} eq $roleid) {
1527: $expiretime=120;
1528: }
1529: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1530: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1531: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1532: &coursedescription($courseid);
1533: }
1534: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1535: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1536: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1537: &log($ENV{'user.domain'},$ENV{'user.name'},
1538: $ENV{'user.host'},
1539: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1540: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1541: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1542: return '';
1543: }
1544: }
1545: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1546: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1547: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1548: &log($ENV{'user.domain'},$ENV{'user.name'},
1549: $ENV{'user.host'},
1550: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1551: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1552: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1553: return '';
1554: }
1555: }
1556: }
1557: }
1558: }
1559:
1560: #
1561: # Rest of the restrictions depend on selected course
1562: #
1563:
1564: unless ($ENV{'request.course.id'}) {
1565: return '1';
1566: }
1567:
1568: #
1569: # Now user is definitely in a course
1570: #
1571:
1572:
1573: # Course preferences
1574:
1575: if ($thisallowed=~/C/) {
1576: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1577: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1578: =~/\,$rolecode\,/) {
1579: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1580: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1581: $ENV{'request.course.id'});
1582: return '';
1583: }
1584: }
1585:
1586: # Resource preferences
1587:
1588: if ($thisallowed=~/R/) {
1589: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1590: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1591: if (-e $filename) {
1592: my @content;
1593: {
1594: my $fh=Apache::File->new($filename);
1595: @content=<$fh>;
1596: }
1597: if (join('',@content)=~
1598: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1599: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1600: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1601: return '';
1602:
1603: }
1604: }
1605: }
1606:
1607: # Restricted by state?
1608:
1609: if ($thisallowed=~/X/) {
1610: if (&condval($statecond)) {
1611: return '2';
1612: } else {
1613: return '';
1614: }
1615: }
1616:
1617: return 'F';
1618: }
1619:
1620: # ----------------------------------------------------------------- Define Role
1621:
1622: sub definerole {
1623: if (allowed('mcr','/')) {
1624: my ($rolename,$sysrole,$domrole,$courole)=@_;
1625: map {
1626: my ($crole,$cqual)=split(/\&/,$_);
1627: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1628: if ($pr{'cr:s'}=~/$crole\&/) {
1629: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1630: return "refused:s:$crole&$cqual";
1631: }
1632: }
1633: } split('/',$sysrole);
1634: map {
1635: my ($crole,$cqual)=split(/\&/,$_);
1636: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1637: if ($pr{'cr:d'}=~/$crole\&/) {
1638: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1639: return "refused:d:$crole&$cqual";
1640: }
1641: }
1642: } split('/',$domrole);
1643: map {
1644: my ($crole,$cqual)=split(/\&/,$_);
1645: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1646: if ($pr{'cr:c'}=~/$crole\&/) {
1647: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1648: return "refused:c:$crole&$cqual";
1649: }
1650: }
1651: } split('/',$courole);
1652: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1653: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1654: "rolesdef_$rolename=".
1655: escape($sysrole.'_'.$domrole.'_'.$courole);
1656: return reply($command,$ENV{'user.home'});
1657: } else {
1658: return 'refused';
1659: }
1660: }
1661:
1662: # ---------------- Make a metadata query against the network of library servers
1663:
1664: sub metadata_query {
1665: my ($query,$custom,$customshow)=@_;
1666: # need to put in a library server loop here and return a hash
1667: my %rhash;
1668: for my $server (keys %libserv) {
1669: unless ($custom or $customshow) {
1670: my $reply=&reply("querysend:".&escape($query),$server);
1671: $rhash{$server}=$reply;
1672: }
1673: else {
1674: my $reply=&reply("querysend:".&escape($query).':'.
1675: &escape($custom).':'.&escape($customshow),
1676: $server);
1677: $rhash{$server}=$reply;
1678: }
1679: }
1680: return \%rhash;
1681: }
1682:
1683: # ------------------------------------------------------------------ Plain Text
1684:
1685: sub plaintext {
1686: my $short=shift;
1687: return $prp{$short};
1688: }
1689:
1690: # ------------------------------------------------------------------ Plain Text
1691:
1692: sub fileembstyle {
1693: my $ending=shift;
1694: return $fe{$ending};
1695: }
1696:
1697: # ------------------------------------------------------------ Description Text
1698:
1699: sub filedescription {
1700: my $ending=shift;
1701: return $fd{$ending};
1702: }
1703:
1704: # ----------------------------------------------------------------- Assign Role
1705:
1706: sub assignrole {
1707: my ($udom,$uname,$url,$role,$end,$start)=@_;
1708: my $mrole;
1709: if ($role =~ /^cr\//) {
1710: unless (&allowed('ccr',$url)) {
1711: &logthis('Refused custom assignrole: '.
1712: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1713: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1714: return 'refused';
1715: }
1716: $mrole='cr';
1717: } else {
1718: my $cwosec=$url;
1719: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1720: unless (&allowed('c'.$role,$cwosec)) {
1721: &logthis('Refused assignrole: '.
1722: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1723: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1724: return 'refused';
1725: }
1726: $mrole=$role;
1727: }
1728: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1729: "$udom:$uname:$url".'_'."$mrole=$role";
1730: if ($end) { $command.='_'.$end; }
1731: if ($start) {
1732: if ($end) {
1733: $command.='_'.$start;
1734: } else {
1735: $command.='_0_'.$start;
1736: }
1737: }
1738: return &reply($command,&homeserver($uname,$udom));
1739: }
1740:
1741: # -------------------------------------------------- Modify user authentication
1742: sub modifyuserauth {
1743: my ($udom,$uname,$umode,$upass)=@_;
1744: my $uhome=&homeserver($uname,$udom);
1745: &logthis('Call to modify user authentication'.$udom.', '.$uname.', '.
1746: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
1747: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
1748: &escape($upass),$uhome);
1749: unless ($reply eq 'ok') {
1750: return 'error: '.$reply;
1751: }
1752: return 'ok';
1753: }
1754:
1755: # --------------------------------------------------------------- Modify a user
1756:
1757:
1758: sub modifyuser {
1759: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1760: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1761: $umode.', '.$first.', '.$middle.', '.
1762: $last.', '.$gene.' by '.
1763: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1764: my $uhome=&homeserver($uname,$udom);
1765: # ----------------------------------------------------------------- Create User
1766: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1767: my $unhome='';
1768: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1769: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1770: } else {
1771: my $tryserver;
1772: my $loadm=10000000;
1773: foreach $tryserver (keys %libserv) {
1774: if ($hostdom{$tryserver} eq $udom) {
1775: my $answer=reply('load',$tryserver);
1776: if (($answer=~/\d+/) && ($answer<$loadm)) {
1777: $loadm=$answer;
1778: $unhome=$tryserver;
1779: }
1780: }
1781: }
1782: }
1783: if (($unhome eq '') || ($unhome eq 'no_host')) {
1784: return 'error: find home';
1785: }
1786: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1787: &escape($upass),$unhome);
1788: unless ($reply eq 'ok') {
1789: return 'error: '.$reply;
1790: }
1791: $uhome=&homeserver($uname,$udom);
1792: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1793: return 'error: verify home';
1794: }
1795: }
1796: # ---------------------------------------------------------------------- Add ID
1797: if ($uid) {
1798: $uid=~tr/A-Z/a-z/;
1799: my %uidhash=&idrget($udom,$uname);
1800: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1801: unless ($uid eq $uidhash{$uname}) {
1802: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1803: }
1804: } else {
1805: &idput($udom,($uname => $uid));
1806: }
1807: }
1808: # -------------------------------------------------------------- Add names, etc
1809: my %names=&get('environment',
1810: ['firstname','middlename','lastname','generation'],
1811: $udom,$uname);
1812: if ($first) { $names{'firstname'} = $first; }
1813: if ($middle) { $names{'middlename'} = $middle; }
1814: if ($last) { $names{'lastname'} = $last; }
1815: if ($gene) { $names{'generation'} = $gene; }
1816: my $reply = &put('environment', \%names, $udom,$uname);
1817: if ($reply ne 'ok') { return 'error: '.$reply; }
1818: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1819: $umode.', '.$first.', '.$middle.', '.
1820: $last.', '.$gene.' by '.
1821: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1822: return 'ok';
1823: }
1824:
1825: # -------------------------------------------------------------- Modify student
1826:
1827: sub modifystudent {
1828: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1829: $end,$start)=@_;
1830: my $cid='';
1831: unless ($cid=$ENV{'request.course.id'}) {
1832: return 'not_in_class';
1833: }
1834: # --------------------------------------------------------------- Make the user
1835: my $reply=&modifyuser
1836: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1837: unless ($reply eq 'ok') { return $reply; }
1838: my $uhome=&homeserver($uname,$udom);
1839: if (($uhome eq '') || ($uhome eq 'no_host')) {
1840: return 'error: no such user';
1841: }
1842: # -------------------------------------------------- Add student to course list
1843: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1844: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1845: &escape($uname.':'.$udom).'='.
1846: &escape($end.':'.$start),
1847: $ENV{'course.'.$cid.'.home'});
1848: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1849: return 'error: '.$reply;
1850: }
1851: # ---------------------------------------------------- Add student role to user
1852: my $uurl='/'.$cid;
1853: $uurl=~s/\_/\//g;
1854: if ($usec) {
1855: $uurl.='/'.$usec;
1856: }
1857: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1858: }
1859:
1860: # ------------------------------------------------- Write to course preferences
1861:
1862: sub writecoursepref {
1863: my ($courseid,%prefs)=@_;
1864: $courseid=~s/^\///;
1865: $courseid=~s/\_/\//g;
1866: my ($cdomain,$cnum)=split(/\//,$courseid);
1867: my $chome=homeserver($cnum,$cdomain);
1868: if (($chome eq '') || ($chome eq 'no_host')) {
1869: return 'error: no such course';
1870: }
1871: my $cstring='';
1872: map {
1873: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1874: } keys %prefs;
1875: $cstring=~s/\&$//;
1876: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1877: }
1878:
1879: # ---------------------------------------------------------- Make/modify course
1880:
1881: sub createcourse {
1882: my ($udom,$description,$url)=@_;
1883: $url=&declutter($url);
1884: my $cid='';
1885: unless (&allowed('ccc',$ENV{'user.domain'})) {
1886: return 'refused';
1887: }
1888: unless ($udom eq $ENV{'user.domain'}) {
1889: return 'refused';
1890: }
1891: # ------------------------------------------------------------------- Create ID
1892: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1893: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1894: # ----------------------------------------------- Make sure that does not exist
1895: my $uhome=&homeserver($uname,$udom);
1896: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1897: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1898: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1899: $uhome=&homeserver($uname,$udom);
1900: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1901: return 'error: unable to generate unique course-ID';
1902: }
1903: }
1904: # ------------------------------------------------------------- Make the course
1905: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1906: $ENV{'user.home'});
1907: unless ($reply eq 'ok') { return 'error: '.$reply; }
1908: $uhome=&homeserver($uname,$udom);
1909: if (($uhome eq '') || ($uhome eq 'no_host')) {
1910: return 'error: no such course';
1911: }
1912: &writecoursepref($udom.'_'.$uname,
1913: ('description' => $description,
1914: 'url' => $url));
1915: return '/'.$udom.'/'.$uname;
1916: }
1917:
1918: # ---------------------------------------------------------- Assign Custom Role
1919:
1920: sub assigncustomrole {
1921: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1922: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1923: $end,$start);
1924: }
1925:
1926: # ----------------------------------------------------------------- Revoke Role
1927:
1928: sub revokerole {
1929: my ($udom,$uname,$url,$role)=@_;
1930: my $now=time;
1931: return &assignrole($udom,$uname,$url,$role,$now);
1932: }
1933:
1934: # ---------------------------------------------------------- Revoke Custom Role
1935:
1936: sub revokecustomrole {
1937: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1938: my $now=time;
1939: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1940: }
1941:
1942: # ------------------------------------------------------------ Directory lister
1943:
1944: sub dirlist {
1945: my $uri=shift;
1946: $uri=~s/^\///;
1947: $uri=~s/\/$//;
1948: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1949: if ($udom) {
1950: if ($uname) {
1951: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1952: homeserver($uname,$udom));
1953: return split(/:/,$listing);
1954: } else {
1955: my $tryserver;
1956: my %allusers=();
1957: foreach $tryserver (keys %libserv) {
1958: if ($hostdom{$tryserver} eq $udom) {
1959: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1960: $tryserver);
1961: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1962: && ($listing ne 'con_lost')) {
1963: map {
1964: my ($entry,@stat)=split(/&/,$_);
1965: $allusers{$entry}=1;
1966: } split(/:/,$listing);
1967: }
1968: }
1969: }
1970: my $alluserstr='';
1971: map {
1972: $alluserstr.=$_.'&user:';
1973: } sort keys %allusers;
1974: $alluserstr=~s/:$//;
1975: return split(/:/,$alluserstr);
1976: }
1977: } else {
1978: my $tryserver;
1979: my %alldom=();
1980: foreach $tryserver (keys %libserv) {
1981: $alldom{$hostdom{$tryserver}}=1;
1982: }
1983: my $alldomstr='';
1984: map {
1985: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1986: } sort keys %alldom;
1987: $alldomstr=~s/:$//;
1988: return split(/:/,$alldomstr);
1989: }
1990: }
1991:
1992: # -------------------------------------------------------- Value of a Condition
1993:
1994: sub directcondval {
1995: my $number=shift;
1996: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1997: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1998: } else {
1999: return 2;
2000: }
2001: }
2002:
2003: sub condval {
2004: my $condidx=shift;
2005: my $result=0;
2006: my $allpathcond='';
2007: map {
2008: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2009: $allpathcond.=
2010: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2011: }
2012: } split(/\|/,$condidx);
2013: $allpathcond=~s/\|$//;
2014: if ($ENV{'request.course.id'}) {
2015: if ($allpathcond) {
2016: my $operand='|';
2017: my @stack;
2018: map {
2019: if ($_ eq '(') {
2020: push @stack,($operand,$result)
2021: } elsif ($_ eq ')') {
2022: my $before=pop @stack;
2023: if (pop @stack eq '&') {
2024: $result=$result>$before?$before:$result;
2025: } else {
2026: $result=$result>$before?$result:$before;
2027: }
2028: } elsif (($_ eq '&') || ($_ eq '|')) {
2029: $operand=$_;
2030: } else {
2031: my $new=directcondval($_);
2032: if ($operand eq '&') {
2033: $result=$result>$new?$new:$result;
2034: } else {
2035: $result=$result>$new?$result:$new;
2036: }
2037: }
2038: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
2039: }
2040: }
2041: return $result;
2042: }
2043:
2044: # --------------------------------------------------------- Value of a Variable
2045:
2046: sub EXT {
2047: my ($varname,$symbparm)=@_;
2048: unless ($varname) { return ''; }
2049: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2050: my $rest;
2051: if ($therest[0]) {
2052: $rest=join('.',@therest);
2053: } else {
2054: $rest='';
2055: }
2056: my $qualifierrest=$qualifier;
2057: if ($rest) { $qualifierrest.='.'.$rest; }
2058: my $spacequalifierrest=$space;
2059: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2060: if ($realm eq 'user') {
2061: # --------------------------------------------------------------- user.resource
2062: if ($space eq 'resource') {
2063: my %restored=&restore();
2064: return $restored{$qualifierrest};
2065: # ----------------------------------------------------------------- user.access
2066: } elsif ($space eq 'access') {
2067: return &allowed($qualifier,$rest);
2068: # ------------------------------------------ user.preferences, user.environment
2069: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2070: return $ENV{join('.',('environment',$qualifierrest))};
2071: # ----------------------------------------------------------------- user.course
2072: } elsif ($space eq 'course') {
2073: return $ENV{join('.',('request.course',$qualifier))};
2074: # ------------------------------------------------------------------- user.role
2075: } elsif ($space eq 'role') {
2076: my ($role,$where)=split(/\./,$ENV{'request.role'});
2077: if ($qualifier eq 'value') {
2078: return $role;
2079: } elsif ($qualifier eq 'extent') {
2080: return $where;
2081: }
2082: # ----------------------------------------------------------------- user.domain
2083: } elsif ($space eq 'domain') {
2084: return $ENV{'user.domain'};
2085: # ------------------------------------------------------------------- user.name
2086: } elsif ($space eq 'name') {
2087: return $ENV{'user.name'};
2088: # ---------------------------------------------------- Any other user namespace
2089: } else {
2090: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2091: my %reply=&get($space,[$item]);
2092: return $reply{$item};
2093: }
2094: } elsif ($realm eq 'request') {
2095: # ------------------------------------------------------------- request.browser
2096: if ($space eq 'browser') {
2097: return $ENV{'browser.'.$qualifier};
2098: # ------------------------------------------------------------ request.filename
2099: } else {
2100: return $ENV{'request.'.$spacequalifierrest};
2101: }
2102: } elsif ($realm eq 'course') {
2103: # ---------------------------------------------------------- course.description
2104: return $ENV{'course.'.$ENV{'request.course.id'}.'.'.
2105: $spacequalifierrest};
2106: } elsif ($realm eq 'resource') {
2107: if ($ENV{'request.course.id'}) {
2108:
2109: # print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2110:
2111:
2112: # ----------------------------------------------------- Cascading lookup scheme
2113: my $symbp;
2114: if ($symbparm) {
2115: $symbp=$symbparm;
2116: } else {
2117: $symbp=&symbread();
2118: }
2119: my $mapp=(split(/\_\_\_/,$symbp))[0];
2120:
2121: my $symbparm=$symbp.'.'.$spacequalifierrest;
2122: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2123:
2124: my $seclevel=
2125: $ENV{'request.course.id'}.'.['.
2126: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
2127: my $seclevelr=
2128: $ENV{'request.course.id'}.'.['.
2129: $ENV{'request.course.sec'}.'].'.$symbparm;
2130: my $seclevelm=
2131: $ENV{'request.course.id'}.'.['.
2132: $ENV{'request.course.sec'}.'].'.$mapparm;
2133:
2134: my $courselevel=
2135: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
2136: my $courselevelr=
2137: $ENV{'request.course.id'}.'.'.$symbparm;
2138: my $courselevelm=
2139: $ENV{'request.course.id'}.'.'.$mapparm;
2140:
2141: # ----------------------------------------------------------- first, check user
2142: my %resourcedata=get('resourcedata',
2143: [$courselevelr,$courselevelm,$courselevel]);
2144: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2145: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2146:
2147: if ($resourcedata{$courselevelr}) {
2148: return $resourcedata{$courselevelr}; }
2149: if ($resourcedata{$courselevelm}) {
2150: return $resourcedata{$courselevelm}; }
2151: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
2152:
2153: } else {
2154: if ($resourcedata{$courselevelr}!~/No such file/) {
2155: &logthis("<font color=blue>WARNING:".
2156: " Trying to get resource data for ".$ENV{'user.name'}." at "
2157: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
2158: "</font>");
2159: }
2160: }
2161:
2162: # -------------------------------------------------------- second, check course
2163:
2164: my $reply=&reply('get:'.
2165: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
2166: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2167: ':resourcedata:'.
2168: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
2169: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
2170: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
2171: if ($reply!~/^error\:/) {
2172: map {
2173: if ($_) { return &unescape($_); }
2174: } split(/\&/,$reply);
2175: }
2176: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
2177: &logthis("<font color=blue>WARNING:".
2178: " Getting ".$reply." asking for ".$varname." for ".
2179: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2180: ' at '.
2181: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
2182: ' from '.
2183: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
2184: "</font>");
2185: }
2186: # ------------------------------------------------------ third, check map parms
2187: my %parmhash=();
2188: my $thisparm='';
2189: if (tie(%parmhash,'GDBM_File',
2190: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
2191: $thisparm=$parmhash{$symbparm};
2192: untie(%parmhash);
2193: }
2194: if ($thisparm) { return $thisparm; }
2195: }
2196:
2197: # --------------------------------------------- last, look in resource metadata
2198:
2199: $spacequalifierrest=~s/\./\_/;
2200: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2201: if ($metadata) { return $metadata; }
2202: $metadata=&metadata($ENV{'request.filename'},
2203: 'parameter_'.$spacequalifierrest);
2204: if ($metadata) { return $metadata; }
2205:
2206: # ------------------------------------------------------------------ Cascade up
2207:
2208: unless ($space eq '0') {
2209: my ($part,$id)=split(/\_/,$space);
2210: if ($id) {
2211: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2212: $symbparm);
2213: if ($partgeneral) { return $partgeneral; }
2214: } else {
2215: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2216: $symbparm);
2217: if ($resourcegeneral) { return $resourcegeneral; }
2218: }
2219: }
2220:
2221: # ---------------------------------------------------- Any other user namespace
2222: } elsif ($realm eq 'environment') {
2223: # ----------------------------------------------------------------- environment
2224: return $ENV{'environment.'.$spacequalifierrest};
2225: } elsif ($realm eq 'system') {
2226: # ----------------------------------------------------------------- system.time
2227: if ($space eq 'time') {
2228: return time;
2229: }
2230: }
2231: return '';
2232: }
2233:
2234: # ---------------------------------------------------------------- Get metadata
2235:
2236: sub metadata {
2237: my ($uri,$what,$liburi,$prefix)=@_;
2238:
2239: $uri=&declutter($uri);
2240: my $filename=$uri;
2241: $uri=~s/\.meta$//;
2242: unless ($metacache{$uri.':keys'}) {
2243: if ($liburi) {
2244: $liburi=&declutter($liburi);
2245: $filename=$liburi;
2246: }
2247: my %metathesekeys=();
2248: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2249: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2250: my $parser=HTML::TokeParser->new(\$metastring);
2251: my $token;
2252: undef %metathesekeys;
2253: while ($token=$parser->get_token) {
2254: if ($token->[0] eq 'S') {
2255: if (defined($token->[2]->{'package'})) {
2256: my $package=$token->[2]->{'package'};
2257: my $keyroot='';
2258: if (defined($token->[2]->{'part'})) {
2259: $keyroot.='_'.$token->[2]->{'part'};
2260: }
2261: if (defined($token->[2]->{'id'})) {
2262: $keyroot.='_'.$token->[2]->{'id'};
2263: }
2264: if ($metacache{$uri.':packages'}) {
2265: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2266: } else {
2267: $metacache{$uri.':packages'}=$package.$keyroot;
2268: }
2269: map {
2270: if ($_=~/^$package\&/) {
2271: my ($pack,$name,$subp)=split(/\&/,$_);
2272: my $value=$packagetab{$_};
2273: my $part=$keyroot;
2274: $part=~s/^\_//;
2275: if ($subp eq 'display') {
2276: $value.=' [Part: '.$part.']';
2277: }
2278: my $unikey='parameter'.$keyroot.'_'.$name;
2279: $metathesekeys{$unikey}=1;
2280: $metacache{$uri.':'.$unikey.'.part'}=$part;
2281: unless
2282: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2283: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2284: }
2285: }
2286: } keys %packagetab;
2287: } else {
2288: my $entry=$token->[1];
2289: my $unikey=$entry;
2290: if (defined($token->[2]->{'part'})) {
2291: $unikey.='_'.$token->[2]->{'part'};
2292: }
2293: if (defined($token->[2]->{'id'})) {
2294: $unikey.='_'.$token->[2]->{'id'};
2295: }
2296: if (defined($token->[2]->{'name'})) {
2297: $unikey.='_'.$token->[2]->{'name'};
2298: }
2299: $metathesekeys{$unikey}=1;
2300: map {
2301: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2302: } @{$token->[3]};
2303: unless (
2304: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
2305: ) { $metacache{$uri.':'.$unikey}=
2306: $metacache{$uri.':'.$unikey.'.default'};
2307: }
2308: }
2309: }
2310: }
2311: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2312: }
2313: return $metacache{$uri.':'.$what};
2314: }
2315:
2316: # ------------------------------------------------- Update symbolic store links
2317:
2318: sub symblist {
2319: my ($mapname,%newhash)=@_;
2320: $mapname=declutter($mapname);
2321: my %hash;
2322: if (($ENV{'request.course.fn'}) && (%newhash)) {
2323: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2324: &GDBM_WRCREAT,0640)) {
2325: map {
2326: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2327: } keys %newhash;
2328: if (untie(%hash)) {
2329: return 'ok';
2330: }
2331: }
2332: }
2333: return 'error';
2334: }
2335:
2336: # ------------------------------------------------------ Return symb list entry
2337:
2338: sub symbread {
2339: my $thisfn=shift;
2340: unless ($thisfn) {
2341: $thisfn=$ENV{'request.filename'};
2342: }
2343: $thisfn=declutter($thisfn);
2344: my %hash;
2345: my %bighash;
2346: my $syval='';
2347: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2348: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2349: &GDBM_READER,0640)) {
2350: $syval=$hash{$thisfn};
2351: untie(%hash);
2352: }
2353: # ---------------------------------------------------------- There was an entry
2354: if ($syval) {
2355: unless ($syval=~/\_\d+$/) {
2356: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2357: &appenv('request.ambiguous' => $thisfn);
2358: return '';
2359: }
2360: $syval.=$1;
2361: }
2362: } else {
2363: # ------------------------------------------------------- Was not in symb table
2364: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2365: &GDBM_READER,0640)) {
2366: # ---------------------------------------------- Get ID(s) for current resource
2367: my $ids=$bighash{'ids_/res/'.$thisfn};
2368: unless ($ids) {
2369: $ids=$bighash{'ids_/'.$thisfn};
2370: }
2371: if ($ids) {
2372: # ------------------------------------------------------------------- Has ID(s)
2373: my @possibilities=split(/\,/,$ids);
2374: if ($#possibilities==0) {
2375: # ----------------------------------------------- There is only one possibility
2376: my ($mapid,$resid)=split(/\./,$ids);
2377: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2378: } else {
2379: # ------------------------------------------ There is more than one possibility
2380: my $realpossible=0;
2381: map {
2382: my $file=$bighash{'src_'.$_};
2383: if (&allowed('bre',$file)) {
2384: my ($mapid,$resid)=split(/\./,$_);
2385: if ($bighash{'map_type_'.$mapid} ne 'page') {
2386: $realpossible++;
2387: $syval=declutter($bighash{'map_id_'.$mapid}).
2388: '___'.$resid;
2389: }
2390: }
2391: } @possibilities;
2392: if ($realpossible!=1) { $syval=''; }
2393: }
2394: }
2395: untie(%bighash)
2396: }
2397: }
2398: if ($syval) {
2399: return $syval.'___'.$thisfn;
2400: }
2401: }
2402: &appenv('request.ambiguous' => $thisfn);
2403: return '';
2404: }
2405:
2406: # ---------------------------------------------------------- Return random seed
2407:
2408: sub numval {
2409: my $txt=shift;
2410: $txt=~tr/A-J/0-9/;
2411: $txt=~tr/a-j/0-9/;
2412: $txt=~tr/K-T/0-9/;
2413: $txt=~tr/k-t/0-9/;
2414: $txt=~tr/U-Z/0-5/;
2415: $txt=~tr/u-z/0-5/;
2416: $txt=~s/\D//g;
2417: return int($txt);
2418: }
2419:
2420: sub rndseed {
2421: my ($symb,$courseid,$domain,$username)=@_;
2422: if (!$symb) {
2423: unless ($symb=&symbread()) { return time; }
2424: }
2425: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2426: if (!$domain) {$domain=$ENV{'user.domain'};}
2427: if (!$username) {$username=$ENV{'user.name'};}
2428: {
2429: use integer;
2430: my $symbchck=unpack("%32C*",$symb) << 27;
2431: my $symbseed=numval($symb) << 22;
2432: my $namechck=unpack("%32C*",$username) << 17;
2433: my $nameseed=numval($username) << 12;
2434: my $domainseed=unpack("%32C*",$domain) << 7;
2435: my $courseseed=unpack("%32C*",$courseid);
2436: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2437: #uncommenting these lines can break things!
2438: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2439: #&Apache::lonxml::debug("rndseed :$num:$symb");
2440: return $num;
2441: }
2442: }
2443:
2444: sub ireceipt {
2445: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2446: my $cuname=unpack("%32C*",$funame);
2447: my $cudom=unpack("%32C*",$fudom);
2448: my $cucourseid=unpack("%32C*",$fucourseid);
2449: my $cusymb=unpack("%32C*",$fusymb);
2450: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2451: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2452: ($cunique%$cuname+
2453: $cunique%$cudom+
2454: $cusymb%$cuname+
2455: $cusymb%$cudom+
2456: $cucourseid%$cuname+
2457: $cucourseid%$cudom);
2458: }
2459:
2460: sub receipt {
2461: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2462: $ENV{'request.course.id'},&symbread());
2463: }
2464:
2465: # ------------------------------------------------------------ Serves up a file
2466: # returns either the contents of the file or a -1
2467: sub getfile {
2468: my $file=shift;
2469: &repcopy($file);
2470: if (! -e $file ) { return -1; };
2471: my $fh=Apache::File->new($file);
2472: my $a='';
2473: while (<$fh>) { $a .=$_; }
2474: return $a
2475: }
2476:
2477: sub filelocation {
2478: my ($dir,$file) = @_;
2479: my $location;
2480: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2481: if ($file=~m:^/~:) { # is a contruction space reference
2482: $location = $file;
2483: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2484: } else {
2485: $file=~s/^$perlvar{'lonDocRoot'}//;
2486: $file=~s:^/*res::;
2487: if ( !( $file =~ m:^/:) ) {
2488: $location = $dir. '/'.$file;
2489: } else {
2490: $location = '/home/httpd/html/res'.$file;
2491: }
2492: }
2493: $location=~s://+:/:g; # remove duplicate /
2494: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2495: return $location;
2496: }
2497:
2498: sub hreflocation {
2499: my ($dir,$file)=@_;
2500: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
2501: my $finalpath=filelocation($dir,$file);
2502: $finalpath=~s/^\/home\/httpd\/html//;
2503: return $finalpath;
2504: } else {
2505: return $file;
2506: }
2507: }
2508:
2509: # ------------------------------------------------------------- Declutters URLs
2510:
2511: sub declutter {
2512: my $thisfn=shift;
2513: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2514: $thisfn=~s/^\///;
2515: $thisfn=~s/^res\///;
2516: return $thisfn;
2517: }
2518:
2519: # -------------------------------------------------------- Escape Special Chars
2520:
2521: sub escape {
2522: my $str=shift;
2523: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2524: return $str;
2525: }
2526:
2527: # ----------------------------------------------------- Un-Escape Special Chars
2528:
2529: sub unescape {
2530: my $str=shift;
2531: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2532: return $str;
2533: }
2534:
2535: # ================================================================ Main Program
2536:
2537: sub BEGIN {
2538: unless ($readit) {
2539: # ------------------------------------------------------------ Read access.conf
2540: {
2541: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2542:
2543: while (my $configline=<$config>) {
2544: if ($configline =~ /PerlSetVar/) {
2545: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2546: chomp($varvalue);
2547: $perlvar{$varname}=$varvalue;
2548: }
2549: }
2550: }
2551:
2552: # ------------------------------------------------------------- Read hosts file
2553: {
2554: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2555:
2556: while (my $configline=<$config>) {
2557: chomp($configline);
2558: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2559: $hostname{$id}=$name;
2560: $hostdom{$id}=$domain;
2561: $hostip{$id}=$ip;
2562: if ($role eq 'library') { $libserv{$id}=$name; }
2563: }
2564: }
2565:
2566: # ------------------------------------------------------ Read spare server file
2567: {
2568: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2569:
2570: while (my $configline=<$config>) {
2571: chomp($configline);
2572: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2573: $spareid{$configline}=1;
2574: }
2575: }
2576: }
2577: # ------------------------------------------------------------ Read permissions
2578: {
2579: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2580:
2581: while (my $configline=<$config>) {
2582: chomp($configline);
2583: if ($configline) {
2584: my ($role,$perm)=split(/ /,$configline);
2585: if ($perm ne '') { $pr{$role}=$perm; }
2586: }
2587: }
2588: }
2589:
2590: # -------------------------------------------- Read plain texts for permissions
2591: {
2592: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2593:
2594: while (my $configline=<$config>) {
2595: chomp($configline);
2596: if ($configline) {
2597: my ($short,$plain)=split(/:/,$configline);
2598: if ($plain ne '') { $prp{$short}=$plain; }
2599: }
2600: }
2601: }
2602:
2603: # ---------------------------------------------------------- Read package table
2604: {
2605: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
2606:
2607: while (my $configline=<$config>) {
2608: chomp($configline);
2609: my ($short,$plain)=split(/:/,$configline);
2610: my ($pack,$name)=split(/\&/,$short);
2611: if ($plain ne '') {
2612: $packagetab{$pack.'&'.$name.'&name'}=$name;
2613: $packagetab{$short}=$plain;
2614: }
2615: }
2616: }
2617:
2618: # ------------------------------------------------------------- Read file types
2619: {
2620: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2621:
2622: while (my $configline=<$config>) {
2623: chomp($configline);
2624: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2625: if ($descr[0] ne '') {
2626: $fe{$ending}=$emb;
2627: $fd{$ending}=join(' ',@descr);
2628: }
2629: }
2630: }
2631:
2632: %metacache=();
2633:
2634: $readit='done';
2635: &logtouch();
2636: &logthis('<font color=yellow>INFO: Read configuration</font>');
2637: }
2638: }
2639: 1;
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