1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # Functions for use by content handlers:
5: #
6: # plaintext(short) : plain text explanation of short term
7: # fileembstyle(ext) : embed style in page for file extension
8: # filedescription(ext) : descriptor text for file extension
9: # allowed(short,url) : returns codes for allowed actions
10: # F: full access
11: # U,I,K: authentication modes (cxx only)
12: # '': forbidden
13: # 1: user needs to choose course
14: # 2: browse allowed
15: # definerole(rolename,sys,dom,cou) : define a custom role rolename
16: # set priviledges in format of lonTabs/roles.tab for
17: # system, domain and course level,
18: # assignrole(udom,uname,url,role,end,start) : give a role to a user for the
19: # level given by url. Optional start and end dates
20: # (leave empty string or zero for "no date")
21: # assigncustomrole (udom,uname,url,rdom,rnam,rolename,end,start) : give a
22: # custom role to a user for the level given by url.
23: # Specify name and domain of role author, and role name
24: # revokerole (udom,uname,url,role) : Revoke a role for url
25: # revokecustomrole (udom,uname,url,rdom,rnam,rolename) : Revoke a custom role
26: # appenv(hash) : adds hash to session environment
27: # delenv(varname) : deletes all environment entries starting with varname
28: # store(hash) : stores hash permanently for this url
29: # cstore(hash) : critical store
30: # restore : returns hash for this url
31: # eget(namesp,array) : returns hash with keys from array filled in from namesp
32: # get(namesp,array) : returns hash with keys from array filled in from namesp
33: # del(namesp,array) : deletes keys out of array from namesp
34: # put(namesp,hash) : stores hash in namesp
35: # cput(namesp,hash) : critical put
36: # dump(namesp) : dumps the complete namespace into a hash
37: # ssi(url,hash) : does a complete request cycle on url to localhost, posts
38: # hash
39: # coursedescription(id) : returns and caches course description for id
40: # repcopy(filename) : replicate file
41: # dirlist(url) : gets a directory listing
42: # directcondval(index) : reading condition value of single condition from
43: # state string
44: # condval(index) : value of condition index based on state
45: # EXT(name) : value of a variable
46: # symblist(map,hash) : Updates symbolic storage links
47: # symbread([filename]) : returns the data handle (filename optional)
48: # rndseed() : returns a random seed
49: # receipt() : returns a receipt to be given out to users
50: # getfile(filename) : returns the contents of filename, or a -1 if it can't
51: # be found, replicates and subscribes to the file
52: # filelocation(dir,file) : returns a farily clean absolute reference to file
53: # from the directory dir
54: # hreflocation(dir,file) : same as filelocation, but for hrefs
55: # log(domain,user,home,msg) : write to permanent log for user
56: # usection(domain,user,courseid) : output of section name/number or '' for
57: # "not in course" and '-1' for "no section"
58: # userenvironment(domain,user,what) : puts out any environment parameter
59: # for a user
60: # idput(domain,hash) : writes IDs for users from hash (name=>id,name=>id)
61: # idget(domain,array): returns hash with usernames (id=>name,id=>name) for
62: # an array of IDs
63: # idrget(domain,array): returns hash with IDs for usernames (name=>id,...) for
64: # an array of names
65: # metadata(file,entry): returns the metadata entry for a file. entry='keys'
66: # returns a comma separated list of keys
67: #
68: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
69: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
70: # 11/8,11/16,11/18,11/22,11/23,12/22,
71: # 01/06,01/13,02/24,02/28,02/29,
72: # 03/01,03/02,03/06,03/07,03/13,
73: # 04/05,05/29,05/31,06/01,
74: # 06/05,06/26 Gerd Kortemeyer
75: # 06/26 Ben Tyszka
76: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
77: # 08/14 Ben Tyszka
78: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
79: # 10/04 Gerd Kortemeyer
80: # 10/04 Guy Albertelli
81: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
82: # 10/30,10/31,
83: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
84: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
85: # 05/01/01 Guy Albertelli
86: # 05/01,06/01,09/01 Gerd Kortemeyer
87: # 09/01 Guy Albertelli
88: # 09/01,10/01,11/01 Gerd Kortemeyer
89:
90: package Apache::lonnet;
91:
92: use strict;
93: use Apache::File;
94: use LWP::UserAgent();
95: use HTTP::Headers;
96: use vars
97: qw(%perlvar %hostname %homecache %spareid %hostdom %libserv %pr %prp %fe %fd $readit %metacache);
98: use IO::Socket;
99: use GDBM_File;
100: use Apache::Constants qw(:common :http);
101: use HTML::TokeParser;
102: use Fcntl qw(:flock);
103:
104: # --------------------------------------------------------------------- Logging
105:
106: sub logthis {
107: my $message=shift;
108: my $execdir=$perlvar{'lonDaemons'};
109: my $now=time;
110: my $local=localtime($now);
111: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
112: print $fh "$local ($$): $message\n";
113: return 1;
114: }
115:
116: sub logperm {
117: my $message=shift;
118: my $execdir=$perlvar{'lonDaemons'};
119: my $now=time;
120: my $local=localtime($now);
121: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
122: print $fh "$now:$message:$local\n";
123: return 1;
124: }
125:
126: # -------------------------------------------------- Non-critical communication
127: sub subreply {
128: my ($cmd,$server)=@_;
129: my $peerfile="$perlvar{'lonSockDir'}/$server";
130: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
131: Type => SOCK_STREAM,
132: Timeout => 10)
133: or return "con_lost";
134: print $client "$cmd\n";
135: my $answer=<$client>;
136: if (!$answer) { $answer="con_lost"; }
137: chomp($answer);
138: return $answer;
139: }
140:
141: sub reply {
142: my ($cmd,$server)=@_;
143: my $answer=subreply($cmd,$server);
144: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
145: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
146: &logthis("<font color=blue>WARNING:".
147: " $cmd to $server returned $answer</font>");
148: }
149: return $answer;
150: }
151:
152: # ----------------------------------------------------------- Send USR1 to lonc
153:
154: sub reconlonc {
155: my $peerfile=shift;
156: &logthis("Trying to reconnect for $peerfile");
157: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
158: if (my $fh=Apache::File->new("$loncfile")) {
159: my $loncpid=<$fh>;
160: chomp($loncpid);
161: if (kill 0 => $loncpid) {
162: &logthis("lonc at pid $loncpid responding, sending USR1");
163: kill USR1 => $loncpid;
164: sleep 1;
165: if (-e "$peerfile") { return; }
166: &logthis("$peerfile still not there, give it another try");
167: sleep 5;
168: if (-e "$peerfile") { return; }
169: &logthis(
170: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
171: } else {
172: &logthis(
173: "<font color=blue>WARNING:".
174: " lonc at pid $loncpid not responding, giving up</font>");
175: }
176: } else {
177: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
178: }
179: }
180:
181: # ------------------------------------------------------ Critical communication
182:
183: sub critical {
184: my ($cmd,$server)=@_;
185: unless ($hostname{$server}) {
186: &logthis("<font color=blue>WARNING:".
187: " Critical message to unknown server ($server)</font>");
188: return 'no_such_host';
189: }
190: my $answer=reply($cmd,$server);
191: if ($answer eq 'con_lost') {
192: my $pingreply=reply('ping',$server);
193: &reconlonc("$perlvar{'lonSockDir'}/$server");
194: my $pongreply=reply('pong',$server);
195: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
196: $answer=reply($cmd,$server);
197: if ($answer eq 'con_lost') {
198: my $now=time;
199: my $middlename=$cmd;
200: $middlename=substr($middlename,0,16);
201: $middlename=~s/\W//g;
202: my $dfilename=
203: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
204: {
205: my $dfh;
206: if ($dfh=Apache::File->new(">$dfilename")) {
207: print $dfh "$cmd\n";
208: }
209: }
210: sleep 2;
211: my $wcmd='';
212: {
213: my $dfh;
214: if ($dfh=Apache::File->new("$dfilename")) {
215: $wcmd=<$dfh>;
216: }
217: }
218: chomp($wcmd);
219: if ($wcmd eq $cmd) {
220: &logthis("<font color=blue>WARNING: ".
221: "Connection buffer $dfilename: $cmd</font>");
222: &logperm("D:$server:$cmd");
223: return 'con_delayed';
224: } else {
225: &logthis("<font color=red>CRITICAL:"
226: ." Critical connection failed: $server $cmd</font>");
227: &logperm("F:$server:$cmd");
228: return 'con_failed';
229: }
230: }
231: }
232: return $answer;
233: }
234:
235: # ---------------------------------------------------------- Append Environment
236:
237: sub appenv {
238: my %newenv=@_;
239: map {
240: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
241: &logthis("<font color=blue>WARNING: ".
242: "Attempt to modify environment ".$_." to ".$newenv{$_});
243: delete($newenv{$_});
244: } else {
245: $ENV{$_}=$newenv{$_};
246: }
247: } keys %newenv;
248:
249: my $lockfh;
250: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
251: return 'error';
252: }
253: unless (flock($lockfh,LOCK_EX)) {
254: &logthis("<font color=blue>WARNING: ".
255: 'Could not obtain exclusive lock in appenv: '.$!);
256: $lockfh->close();
257: return 'error: '.$!;
258: }
259:
260: my @oldenv;
261: {
262: my $fh;
263: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
264: return 'error';
265: }
266: @oldenv=<$fh>;
267: $fh->close();
268: }
269: for (my $i=0; $i<=$#oldenv; $i++) {
270: chomp($oldenv[$i]);
271: if ($oldenv[$i] ne '') {
272: my ($name,$value)=split(/=/,$oldenv[$i]);
273: unless (defined($newenv{$name})) {
274: $newenv{$name}=$value;
275: }
276: }
277: }
278: {
279: my $fh;
280: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
281: return 'error';
282: }
283: my $newname;
284: foreach $newname (keys %newenv) {
285: print $fh "$newname=$newenv{$newname}\n";
286: }
287: $fh->close();
288: }
289:
290: $lockfh->close();
291: return 'ok';
292: }
293: # ----------------------------------------------------- Delete from Environment
294:
295: sub delenv {
296: my $delthis=shift;
297: my %newenv=();
298: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
299: &logthis("<font color=blue>WARNING: ".
300: "Attempt to delete from environment ".$delthis);
301: return 'error';
302: }
303: my @oldenv;
304: {
305: my $fh;
306: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
307: return 'error';
308: }
309: unless (flock($fh,LOCK_SH)) {
310: &logthis("<font color=blue>WARNING: ".
311: 'Could not obtain shared lock in delenv: '.$!);
312: $fh->close();
313: return 'error: '.$!;
314: }
315: @oldenv=<$fh>;
316: $fh->close();
317: }
318: {
319: my $fh;
320: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
321: return 'error';
322: }
323: unless (flock($fh,LOCK_EX)) {
324: &logthis("<font color=blue>WARNING: ".
325: 'Could not obtain exclusive lock in delenv: '.$!);
326: $fh->close();
327: return 'error: '.$!;
328: }
329: map {
330: unless ($_=~/^$delthis/) { print $fh $_; }
331: } @oldenv;
332: $fh->close();
333: }
334: return 'ok';
335: }
336:
337: # ------------------------------ Find server with least workload from spare.tab
338:
339: sub spareserver {
340: my $tryserver;
341: my $spareserver='';
342: my $lowestserver=100;
343: foreach $tryserver (keys %spareid) {
344: my $answer=reply('load',$tryserver);
345: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
346: $spareserver="http://$hostname{$tryserver}";
347: $lowestserver=$answer;
348: }
349: }
350: return $spareserver;
351: }
352:
353: # --------- Try to authenticate user from domain's lib servers (first this one)
354:
355: sub authenticate {
356: my ($uname,$upass,$udom)=@_;
357: $upass=escape($upass);
358: if (($perlvar{'lonRole'} eq 'library') &&
359: ($udom eq $perlvar{'lonDefDomain'})) {
360: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
361: if ($answer =~ /authorized/) {
362: if ($answer eq 'authorized') {
363: &logthis("User $uname at $udom authorized by local server");
364: return $perlvar{'lonHostID'};
365: }
366: if ($answer eq 'non_authorized') {
367: &logthis("User $uname at $udom rejected by local server");
368: return 'no_host';
369: }
370: }
371: }
372:
373: my $tryserver;
374: foreach $tryserver (keys %libserv) {
375: if ($hostdom{$tryserver} eq $udom) {
376: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
377: if ($answer =~ /authorized/) {
378: if ($answer eq 'authorized') {
379: &logthis("User $uname at $udom authorized by $tryserver");
380: return $tryserver;
381: }
382: if ($answer eq 'non_authorized') {
383: &logthis("User $uname at $udom rejected by $tryserver");
384: return 'no_host';
385: }
386: }
387: }
388: }
389: &logthis("User $uname at $udom could not be authenticated");
390: return 'no_host';
391: }
392:
393: # ---------------------- Find the homebase for a user from domain's lib servers
394:
395: sub homeserver {
396: my ($uname,$udom)=@_;
397:
398: my $index="$uname:$udom";
399: if ($homecache{$index}) { return "$homecache{$index}"; }
400:
401: my $tryserver;
402: foreach $tryserver (keys %libserv) {
403: if ($hostdom{$tryserver} eq $udom) {
404: my $answer=reply("home:$udom:$uname",$tryserver);
405: if ($answer eq 'found') {
406: $homecache{$index}=$tryserver;
407: return $tryserver;
408: }
409: }
410: }
411: return 'no_host';
412: }
413:
414: # ------------------------------------- Find the usernames behind a list of IDs
415:
416: sub idget {
417: my ($udom,@ids)=@_;
418: my %returnhash=();
419:
420: my $tryserver;
421: foreach $tryserver (keys %libserv) {
422: if ($hostdom{$tryserver} eq $udom) {
423: my $idlist=join('&',@ids);
424: $idlist=~tr/A-Z/a-z/;
425: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
426: my @answer=();
427: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
428: @answer=split(/\&/,$reply);
429: } ;
430: my $i;
431: for ($i=0;$i<=$#ids;$i++) {
432: if ($answer[$i]) {
433: $returnhash{$ids[$i]}=$answer[$i];
434: }
435: }
436: }
437: }
438: return %returnhash;
439: }
440:
441: # ------------------------------------- Find the IDs behind a list of usernames
442:
443: sub idrget {
444: my ($udom,@unames)=@_;
445: my %returnhash=();
446: map {
447: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
448: } @unames;
449: return %returnhash;
450: }
451:
452: # ------------------------------- Store away a list of names and associated IDs
453:
454: sub idput {
455: my ($udom,%ids)=@_;
456: my %servers=();
457: map {
458: my $uhom=&homeserver($_,$udom);
459: if ($uhom ne 'no_host') {
460: my $id=&escape($ids{$_});
461: $id=~tr/A-Z/a-z/;
462: my $unam=&escape($_);
463: if ($servers{$uhom}) {
464: $servers{$uhom}.='&'.$id.'='.$unam;
465: } else {
466: $servers{$uhom}=$id.'='.$unam;
467: }
468: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
469: }
470: } keys %ids;
471: map {
472: &critical('idput:'.$udom.':'.$servers{$_},$_);
473: } keys %servers;
474: }
475:
476: # ------------------------------------- Find the section of student in a course
477:
478: sub usection {
479: my ($udom,$unam,$courseid)=@_;
480: $courseid=~s/\_/\//g;
481: $courseid=~s/^(\w)/\/$1/;
482: map {
483: my ($key,$value)=split(/\=/,$_);
484: $key=&unescape($key);
485: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
486: my $section=$1;
487: if ($key eq $courseid.'_st') { $section=''; }
488: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
489: my $now=time;
490: my $notactive=0;
491: if ($start) {
492: if ($now<$start) { $notactive=1; }
493: }
494: if ($end) {
495: if ($now>$end) { $notactive=1; }
496: }
497: unless ($notactive) { return $section; }
498: }
499: } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
500: &homeserver($unam,$udom)));
501: return '-1';
502: }
503:
504: # ------------------------------------- Read an entry from a user's environment
505:
506: sub userenvironment {
507: my ($udom,$unam,@what)=@_;
508: my %returnhash=();
509: my @answer=split(/\&/,
510: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
511: &homeserver($unam,$udom)));
512: my $i;
513: for ($i=0;$i<=$#what;$i++) {
514: $returnhash{$what[$i]}=&unescape($answer[$i]);
515: }
516: return %returnhash;
517: }
518:
519: # ----------------------------- Subscribe to a resource, return URL if possible
520:
521: sub subscribe {
522: my $fname=shift;
523: my $author=$fname;
524: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
525: my ($udom,$uname)=split(/\//,$author);
526: my $home=homeserver($uname,$udom);
527: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
528: return 'not_found';
529: }
530: my $answer=reply("sub:$fname",$home);
531: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
532: $answer.=' by '.$home;
533: }
534: return $answer;
535: }
536:
537: # -------------------------------------------------------------- Replicate file
538:
539: sub repcopy {
540: my $filename=shift;
541: $filename=~s/\/+/\//g;
542: my $transname="$filename.in.transfer";
543: if ((-e $filename) || (-e $transname)) { return OK; }
544: my $remoteurl=subscribe($filename);
545: if ($remoteurl =~ /^con_lost by/) {
546: &logthis("Subscribe returned $remoteurl: $filename");
547: return HTTP_SERVICE_UNAVAILABLE;
548: } elsif ($remoteurl eq 'not_found') {
549: &logthis("Subscribe returned not_found: $filename");
550: return HTTP_NOT_FOUND;
551: } elsif ($remoteurl =~ /^rejected by/) {
552: &logthis("Subscribe returned $remoteurl: $filename");
553: return FORBIDDEN;
554: } elsif ($remoteurl eq 'directory') {
555: return OK;
556: } else {
557: my @parts=split(/\//,$filename);
558: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
559: if ($path ne "$perlvar{'lonDocRoot'}/res") {
560: &logthis("Malconfiguration for replication: $filename");
561: return HTTP_BAD_REQUEST;
562: }
563: my $count;
564: for ($count=5;$count<$#parts;$count++) {
565: $path.="/$parts[$count]";
566: if ((-e $path)!=1) {
567: mkdir($path,0777);
568: }
569: }
570: my $ua=new LWP::UserAgent;
571: my $request=new HTTP::Request('GET',"$remoteurl");
572: my $response=$ua->request($request,$transname);
573: if ($response->is_error()) {
574: unlink($transname);
575: my $message=$response->status_line;
576: &logthis("<font color=blue>WARNING:"
577: ." LWP get: $message: $filename</font>");
578: return HTTP_SERVICE_UNAVAILABLE;
579: } else {
580: if ($remoteurl!~/\.meta$/) {
581: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
582: my $mresponse=$ua->request($mrequest,$filename.'.meta');
583: if ($mresponse->is_error()) {
584: unlink($filename.'.meta');
585: &logthis(
586: "<font color=yellow>INFO: No metadata: $filename</font>");
587: }
588: }
589: rename($transname,$filename);
590: return OK;
591: }
592: }
593: }
594:
595: # --------------------------------------------------------- Server Side Include
596:
597: sub ssi {
598:
599: my ($fn,%form)=@_;
600:
601: my $ua=new LWP::UserAgent;
602:
603: my $request;
604:
605: if (%form) {
606: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
607: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
608: } else {
609: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
610: }
611:
612: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
613: my $response=$ua->request($request);
614:
615: return $response->content;
616: }
617:
618: # ------------------------------------------------------------------------- Log
619:
620: sub log {
621: my ($dom,$nam,$hom,$what)=@_;
622: return critical("log:$dom:$nam:$what",$hom);
623: }
624:
625: # ----------------------------------------------------------------------- Store
626:
627: sub store {
628: my %storehash=@_;
629: my $symb;
630: unless ($symb=escape(&symbread())) { return ''; }
631: my $namespace;
632: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
633: my $namevalue='';
634: map {
635: $namevalue.=escape($_).'='.escape($storehash{$_}).'&';
636: } keys %storehash;
637: $namevalue=~s/\&$//;
638: return reply(
639: "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
640: "$ENV{'user.home'}");
641: }
642:
643: # -------------------------------------------------------------- Critical Store
644:
645: sub cstore {
646: my %storehash=@_;
647: my $symb;
648: unless ($symb=escape(&symbread())) { return ''; }
649: my $namespace;
650: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
651: my $namevalue='';
652: map {
653: $namevalue.=escape($_).'='.escape($storehash{$_}).'&';
654: } keys %storehash;
655: $namevalue=~s/\&$//;
656: return critical(
657: "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
658: "$ENV{'user.home'}");
659: }
660:
661: # --------------------------------------------------------------------- Restore
662:
663: sub restore {
664: my $symb;
665: unless ($symb=escape(&symbread())) { return ''; }
666: my $namespace;
667: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
668: my $answer=reply(
669: "restore:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb",
670: "$ENV{'user.home'}");
671: my %returnhash=();
672: map {
673: my ($name,$value)=split(/\=/,$_);
674: $returnhash{&unescape($name)}=&unescape($value);
675: } split(/\&/,$answer);
676: my $version;
677: for ($version=1;$version<=$returnhash{'version'};$version++) {
678: map {
679: $returnhash{$_}=$returnhash{$version.':'.$_};
680: } split(/\:/,$returnhash{$version.':keys'});
681: }
682: return %returnhash;
683: }
684:
685: # ---------------------------------------------------------- Course Description
686:
687: sub coursedescription {
688: my $courseid=shift;
689: $courseid=~s/^\///;
690: $courseid=~s/\_/\//g;
691: my ($cdomain,$cnum)=split(/\//,$courseid);
692: my $chome=homeserver($cnum,$cdomain);
693: if ($chome ne 'no_host') {
694: my $rep=reply("dump:$cdomain:$cnum:environment",$chome);
695: if ($rep ne 'con_lost') {
696: my $normalid=$courseid;
697: $normalid=~s/\//\_/g;
698: my %envhash=();
699: my %returnhash=('home' => $chome,
700: 'domain' => $cdomain,
701: 'num' => $cnum);
702: map {
703: my ($name,$value)=split(/\=/,$_);
704: $name=&unescape($name);
705: $value=&unescape($value);
706: $returnhash{$name}=$value;
707: $envhash{'course.'.$normalid.'.'.$name}=$value;
708: } split(/\&/,$rep);
709: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
710: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
711: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
712: $envhash{'course.'.$normalid.'.last_cache'}=time;
713: $envhash{'course.'.$normalid.'.home'}=$chome;
714: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
715: $envhash{'course.'.$normalid.'.num'}=$cnum;
716: &appenv(%envhash);
717: return %returnhash;
718: }
719: }
720: return ();
721: }
722:
723: # -------------------------------------------------------- Get user priviledges
724:
725: sub rolesinit {
726: my ($domain,$username,$authhost)=@_;
727: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
728: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
729: my %allroles=();
730: my %thesepriv=();
731: my $now=time;
732: my $userroles="user.login.time=$now\n";
733: my $thesestr;
734:
735: if ($rolesdump ne '') {
736: map {
737: if ($_!~/^rolesdef\&/) {
738: my ($area,$role)=split(/=/,$_);
739: $area=~s/\_\w\w$//;
740: my ($trole,$tend,$tstart)=split(/_/,$role);
741: $userroles.='user.role.'.$trole.'.'.$area.'='.
742: $tstart.'.'.$tend."\n";
743: if ($tend!=0) {
744: if ($tend<$now) {
745: $trole='';
746: }
747: }
748: if ($tstart!=0) {
749: if ($tstart>$now) {
750: $trole='';
751: }
752: }
753: if (($area ne '') && ($trole ne '')) {
754: my $spec=$trole.'.'.$area;
755: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
756: if ($trole =~ /^cr\//) {
757: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
758: my $homsvr=homeserver($rauthor,$rdomain);
759: if ($hostname{$homsvr} ne '') {
760: my $roledef=
761: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
762: $homsvr);
763: if (($roledef ne 'con_lost') && ($roledef ne '')) {
764: my ($syspriv,$dompriv,$coursepriv)=
765: split(/\_/,unescape($roledef));
766: $allroles{'cm./'}.=':'.$syspriv;
767: $allroles{$spec.'./'}.=':'.$syspriv;
768: if ($tdomain ne '') {
769: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
770: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
771: if ($trest ne '') {
772: $allroles{'cm.'.$area}.=':'.$coursepriv;
773: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
774: }
775: }
776: }
777: }
778: } else {
779: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
780: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
781: if ($tdomain ne '') {
782: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
783: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
784: if ($trest ne '') {
785: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
786: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
787: }
788: }
789: }
790: }
791: }
792: } split(/&/,$rolesdump);
793: map {
794: %thesepriv=();
795: map {
796: if ($_ ne '') {
797: my ($priviledge,$restrictions)=split(/&/,$_);
798: if ($restrictions eq '') {
799: $thesepriv{$priviledge}='F';
800: } else {
801: if ($thesepriv{$priviledge} ne 'F') {
802: $thesepriv{$priviledge}.=$restrictions;
803: }
804: }
805: }
806: } split(/:/,$allroles{$_});
807: $thesestr='';
808: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
809: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
810: } keys %allroles;
811: }
812: return $userroles;
813: }
814:
815: # --------------------------------------------------------------- get interface
816:
817: sub get {
818: my ($namespace,@storearr)=@_;
819: my $items='';
820: map {
821: $items.=escape($_).'&';
822: } @storearr;
823: $items=~s/\&$//;
824: my $rep=reply("get:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
825: $ENV{'user.home'});
826: my @pairs=split(/\&/,$rep);
827: my %returnhash=();
828: my $i=0;
829: map {
830: $returnhash{$_}=unescape($pairs[$i]);
831: $i++;
832: } @storearr;
833: return %returnhash;
834: }
835:
836: # --------------------------------------------------------------- del interface
837:
838: sub del {
839: my ($namespace,@storearr)=@_;
840: my $items='';
841: map {
842: $items.=escape($_).'&';
843: } @storearr;
844: $items=~s/\&$//;
845: return reply("del:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
846: $ENV{'user.home'});
847: }
848:
849: # -------------------------------------------------------------- dump interface
850:
851: sub dump {
852: my $namespace=shift;
853: my $rep=reply("dump:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace",
854: $ENV{'user.home'});
855: my @pairs=split(/\&/,$rep);
856: my %returnhash=();
857: map {
858: my ($key,$value)=split(/=/,$_);
859: $returnhash{unescape($key)}=unescape($value);
860: } @pairs;
861: return %returnhash;
862: }
863:
864: # --------------------------------------------------------------- put interface
865:
866: sub put {
867: my ($namespace,%storehash)=@_;
868: my $items='';
869: map {
870: $items.=escape($_).'='.escape($storehash{$_}).'&';
871: } keys %storehash;
872: $items=~s/\&$//;
873: return reply("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
874: $ENV{'user.home'});
875: }
876:
877: # ------------------------------------------------------ critical put interface
878:
879: sub cput {
880: my ($namespace,%storehash)=@_;
881: my $items='';
882: map {
883: $items.=escape($_).'='.escape($storehash{$_}).'&';
884: } keys %storehash;
885: $items=~s/\&$//;
886: return critical
887: ("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
888: $ENV{'user.home'});
889: }
890:
891: # -------------------------------------------------------------- eget interface
892:
893: sub eget {
894: my ($namespace,@storearr)=@_;
895: my $items='';
896: map {
897: $items.=escape($_).'&';
898: } @storearr;
899: $items=~s/\&$//;
900: my $rep=reply("eget:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
901: $ENV{'user.home'});
902: my @pairs=split(/\&/,$rep);
903: my %returnhash=();
904: my $i=0;
905: map {
906: $returnhash{$_}=unescape($pairs[$i]);
907: $i++;
908: } @storearr;
909: return %returnhash;
910: }
911:
912: # ------------------------------------------------- Check for a user priviledge
913:
914: sub allowed {
915: my ($priv,$uri)=@_;
916: $uri=&declutter($uri);
917:
918: # Free bre access to adm and meta resources
919:
920: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
921: return 'F';
922: }
923:
924: my $thisallowed='';
925: my $statecond=0;
926: my $courseprivid='';
927:
928: # Course
929:
930: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
931: $thisallowed.=$1;
932: }
933:
934: # Domain
935:
936: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
937: =~/$priv\&([^\:]*)/) {
938: $thisallowed.=$1;
939: }
940:
941: # Course: uri itself is a course
942: my $courseuri=$uri;
943: $courseuri=~s/\_(\d)/\/$1/;
944: $courseuri=~s/^([^\/])/\/$1/;
945:
946: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
947: =~/$priv\&([^\:]*)/) {
948: $thisallowed.=$1;
949: }
950:
951: # Full access at system, domain or course-wide level? Exit.
952:
953: if ($thisallowed=~/F/) {
954: return 'F';
955: }
956:
957: # If this is generating or modifying users, exit with special codes
958:
959: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:'=~/\:$priv\:/) {
960: return $thisallowed;
961: }
962: #
963: # Gathered so far: system, domain and course wide priviledges
964: #
965: # Course: See if uri or referer is an individual resource that is part of
966: # the course
967:
968: if ($ENV{'request.course.id'}) {
969: $courseprivid=$ENV{'request.course.id'};
970: if ($ENV{'request.course.sec'}) {
971: $courseprivid.='/'.$ENV{'request.course.sec'};
972: }
973: $courseprivid=~s/\_/\//;
974: my $checkreferer=1;
975: my @uriparts=split(/\//,$uri);
976: my $filename=$uriparts[$#uriparts];
977: my $pathname=$uri;
978: $pathname=~s/\/$filename$//;
979: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
980: /\&$filename\:([\d\|]+)\&/) {
981: $statecond=$1;
982: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
983: =~/$priv\&([^\:]*)/) {
984: $thisallowed.=$1;
985: $checkreferer=0;
986: }
987: }
988:
989: if (($ENV{'HTTP_REFERER'}) && ($checkreferer)) {
990: my $refuri=$ENV{'HTTP_REFERER'};
991: $refuri=~s/^http\:\/\/$ENV{'request.host'}//i;
992: $refuri=&declutter($refuri);
993: my @uriparts=split(/\//,$refuri);
994: my $filename=$uriparts[$#uriparts];
995: my $pathname=$refuri;
996: $pathname=~s/\/$filename$//;
997: my @filenameparts=split(/\./,$uri);
998: if (&fileembstyle($filenameparts[$#filenameparts]) ne 'ssi') {
999: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1000: /\&$filename\:([\d\|]+)\&/) {
1001: my $refstatecond=$1;
1002: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1003: =~/$priv\&([^\:]*)/) {
1004: $thisallowed.=$1;
1005: $uri=$refuri;
1006: $statecond=$refstatecond;
1007: }
1008: }
1009: }
1010: }
1011: }
1012:
1013: #
1014: # Gathered now: all priviledges that could apply, and condition number
1015: #
1016: #
1017: # Full or no access?
1018: #
1019:
1020: if ($thisallowed=~/F/) {
1021: return 'F';
1022: }
1023:
1024: unless ($thisallowed) {
1025: return '';
1026: }
1027:
1028: # Restrictions exist, deal with them
1029: #
1030: # C:according to course preferences
1031: # R:according to resource settings
1032: # L:unless locked
1033: # X:according to user session state
1034: #
1035:
1036: # Possibly locked functionality, check all courses
1037: # Locks might take effect only after 10 minutes cache expiration for other
1038: # courses, and 2 minutes for current course
1039:
1040: my $envkey;
1041: if ($thisallowed=~/L/) {
1042: foreach $envkey (keys %ENV) {
1043: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1044: my $courseid=$2;
1045: my $roleid=$1.'.'.$2;
1046: $courseid=~s/^\///;
1047: my $expiretime=600;
1048: if ($ENV{'request.role'} eq $roleid) {
1049: $expiretime=120;
1050: }
1051: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1052: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1053: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1054: &coursedescription($courseid);
1055: }
1056: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1057: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1058: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1059: &log($ENV{'user.domain'},$ENV{'user.name'},
1060: $ENV{'user.host'},
1061: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1062: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1063: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1064: return '';
1065: }
1066: }
1067: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1068: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1069: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1070: &log($ENV{'user.domain'},$ENV{'user.name'},
1071: $ENV{'user.host'},
1072: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1073: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1074: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1075: return '';
1076: }
1077: }
1078: }
1079: }
1080: }
1081:
1082: #
1083: # Rest of the restrictions depend on selected course
1084: #
1085:
1086: unless ($ENV{'request.course.id'}) {
1087: return '1';
1088: }
1089:
1090: #
1091: # Now user is definitely in a course
1092: #
1093:
1094:
1095: # Course preferences
1096:
1097: if ($thisallowed=~/C/) {
1098: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1099: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1100: =~/\,$rolecode\,/) {
1101: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1102: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1103: $ENV{'request.course.id'});
1104: return '';
1105: }
1106: }
1107:
1108: # Resource preferences
1109:
1110: if ($thisallowed=~/R/) {
1111: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1112: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1113: if (-e $filename) {
1114: my @content;
1115: {
1116: my $fh=Apache::File->new($filename);
1117: @content=<$fh>;
1118: }
1119: if (join('',@content)=~
1120: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1121: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1122: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1123: return '';
1124:
1125: }
1126: }
1127: }
1128:
1129: # Restricted by state?
1130:
1131: if ($thisallowed=~/X/) {
1132: if (&condval($statecond)) {
1133: return '2';
1134: } else {
1135: return '';
1136: }
1137: }
1138:
1139: return 'F';
1140: }
1141:
1142: # ----------------------------------------------------------------- Define Role
1143:
1144: sub definerole {
1145: if (allowed('mcr','/')) {
1146: my ($rolename,$sysrole,$domrole,$courole)=@_;
1147: map {
1148: my ($crole,$cqual)=split(/\&/,$_);
1149: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1150: if ($pr{'cr:s'}=~/$crole\&/) {
1151: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1152: return "refused:s:$crole&$cqual";
1153: }
1154: }
1155: } split('/',$sysrole);
1156: map {
1157: my ($crole,$cqual)=split(/\&/,$_);
1158: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1159: if ($pr{'cr:d'}=~/$crole\&/) {
1160: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1161: return "refused:d:$crole&$cqual";
1162: }
1163: }
1164: } split('/',$domrole);
1165: map {
1166: my ($crole,$cqual)=split(/\&/,$_);
1167: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1168: if ($pr{'cr:c'}=~/$crole\&/) {
1169: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1170: return "refused:c:$crole&$cqual";
1171: }
1172: }
1173: } split('/',$courole);
1174: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1175: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1176: "rolesdef_$rolename=".
1177: escape($sysrole.'_'.$domrole.'_'.$courole);
1178: return reply($command,$ENV{'user.home'});
1179: } else {
1180: return 'refused';
1181: }
1182: }
1183:
1184: # ------------------------------------------------------------------ Plain Text
1185:
1186: sub plaintext {
1187: my $short=shift;
1188: return $prp{$short};
1189: }
1190:
1191: # ------------------------------------------------------------------ Plain Text
1192:
1193: sub fileembstyle {
1194: my $ending=shift;
1195: return $fe{$ending};
1196: }
1197:
1198: # ------------------------------------------------------------ Description Text
1199:
1200: sub filedescription {
1201: my $ending=shift;
1202: return $fd{$ending};
1203: }
1204:
1205: # ----------------------------------------------------------------- Assign Role
1206:
1207: sub assignrole {
1208: my ($udom,$uname,$url,$role,$end,$start)=@_;
1209: my $mrole;
1210: if ($role =~ /^cr\//) {
1211: unless (&allowed('ccr',$url)) { return 'refused'; }
1212: $mrole='cr';
1213: } else {
1214: my $cwosec=$url;
1215: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1216: unless (&allowed('c'.$role,$cwosec)) { return 'refused'; }
1217: $mrole=$role;
1218: }
1219: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1220: "$udom:$uname:$url".'_'."$mrole=$role";
1221: if ($end) { $command.='_'.$end; }
1222: if ($start) {
1223: if ($end) {
1224: $command.='_'.$start;
1225: } else {
1226: $command.='_0_'.$start;
1227: }
1228: }
1229: return &reply($command,&homeserver($uname,$udom));
1230: }
1231:
1232: # --------------------------------------------------------------- Modify a user
1233:
1234:
1235: sub modifyuser {
1236: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1237: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1238: $umode.', '.$first.', '.$middle.', '.
1239: $last.', '.$gene.' by '.
1240: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1241: my $uhome=&homeserver($uname,$udom);
1242: # ----------------------------------------------------------------- Create User
1243: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1244: my $unhome='';
1245: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1246: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1247: } else {
1248: my $tryserver;
1249: my $loadm=10000000;
1250: foreach $tryserver (keys %libserv) {
1251: if ($hostdom{$tryserver} eq $udom) {
1252: my $answer=reply('load',$tryserver);
1253: if (($answer=~/\d+/) && ($answer<$loadm)) {
1254: $loadm=$answer;
1255: $unhome=$tryserver;
1256: }
1257: }
1258: }
1259: }
1260: if (($unhome eq '') || ($unhome eq 'no_host')) {
1261: return 'error: find home';
1262: }
1263: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1264: &escape($upass),$unhome);
1265: unless ($reply eq 'ok') {
1266: return 'error: '.$reply;
1267: }
1268: $uhome=&homeserver($uname,$udom);
1269: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1270: return 'error: verify home';
1271: }
1272: }
1273: # ---------------------------------------------------------------------- Add ID
1274: if ($uid) {
1275: $uid=~tr/A-Z/a-z/;
1276: my %uidhash=&idrget($udom,$uname);
1277: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1278: unless ($uid eq $uidhash{$uname}) {
1279: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1280: }
1281: } else {
1282: &idput($udom,($uname => $uid));
1283: }
1284: }
1285: # -------------------------------------------------------------- Add names, etc
1286: my $names=&reply('get:'.$udom.':'.$uname.
1287: ':environment:firstname&middlename&lastname&generation',
1288: $uhome);
1289: my ($efirst,$emiddle,$elast,$egene)=split(/\&/,$names);
1290: if ($first) { $efirst = &escape($first); }
1291: if ($middle) { $emiddle = &escape($middle); }
1292: if ($last) { $elast = &escape($last); }
1293: if ($gene) { $egene = &escape($gene); }
1294: my $reply=&reply('put:'.$udom.':'.$uname.
1295: ':environment:firstname='.$efirst.
1296: '&middlename='.$emiddle.
1297: '&lastname='.$elast.
1298: '&generation='.$egene,$uhome);
1299: if ($reply ne 'ok') {
1300: return 'error: '.$reply;
1301: }
1302: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1303: $umode.', '.$first.', '.$middle.', '.
1304: $last.', '.$gene.' by '.
1305: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1306: return 'ok';
1307: }
1308:
1309: # -------------------------------------------------------------- Modify student
1310:
1311: sub modifystudent {
1312: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1313: $end,$start)=@_;
1314: my $cid='';
1315: unless ($cid=$ENV{'request.course.id'}) {
1316: return 'not_in_class';
1317: }
1318: # --------------------------------------------------------------- Make the user
1319: my $reply=&modifyuser
1320: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1321: unless ($reply eq 'ok') { return $reply; }
1322: my $uhome=&homeserver($uname,$udom);
1323: if (($uhome eq '') || ($uhome eq 'no_host')) {
1324: return 'error: no such user';
1325: }
1326: # -------------------------------------------------- Add student to course list
1327: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1328: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1329: &escape($uname.':'.$udom).'='.
1330: &escape($end.':'.$start),
1331: $ENV{'course.'.$cid.'.home'});
1332: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1333: return 'error: '.$reply;
1334: }
1335: # ---------------------------------------------------- Add student role to user
1336: my $uurl='/'.$cid;
1337: $uurl=~s/\_/\//g;
1338: if ($usec) {
1339: $uurl.='/'.$usec;
1340: }
1341: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1342: }
1343:
1344: # ------------------------------------------------- Write to course preferences
1345:
1346: sub writecoursepref {
1347: my ($courseid,%prefs)=@_;
1348: $courseid=~s/^\///;
1349: $courseid=~s/\_/\//g;
1350: my ($cdomain,$cnum)=split(/\//,$courseid);
1351: my $chome=homeserver($cnum,$cdomain);
1352: if (($chome eq '') || ($chome eq 'no_host')) {
1353: return 'error: no such course';
1354: }
1355: my $cstring='';
1356: map {
1357: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1358: } keys %prefs;
1359: $cstring=~s/\&$//;
1360: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1361: }
1362:
1363: # ---------------------------------------------------------- Make/modify course
1364:
1365: sub createcourse {
1366: my ($udom,$description,$url)=@_;
1367: $url=&declutter($url);
1368: my $cid='';
1369: unless (&allowed('ccc',$ENV{'user.domain'})) {
1370: return 'refused';
1371: }
1372: unless ($udom eq $ENV{'user.domain'}) {
1373: return 'refused';
1374: }
1375: # ------------------------------------------------------------------- Create ID
1376: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1377: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1378: # ----------------------------------------------- Make sure that does not exist
1379: my $uhome=&homeserver($uname,$udom);
1380: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1381: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1382: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1383: $uhome=&homeserver($uname,$udom);
1384: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1385: return 'error: unable to generate unique course-ID';
1386: }
1387: }
1388: # ------------------------------------------------------------- Make the course
1389: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1390: $ENV{'user.home'});
1391: unless ($reply eq 'ok') { return 'error: '.$reply; }
1392: my $uhome=&homeserver($uname,$udom);
1393: if (($uhome eq '') || ($uhome eq 'no_host')) {
1394: return 'error: no such course';
1395: }
1396: &writecoursepref($udom.'_'.$uname,
1397: ('description' => $description,
1398: 'url' => $url));
1399: return '/'.$udom.'/'.$uname;
1400: }
1401:
1402: # ---------------------------------------------------------- Assign Custom Role
1403:
1404: sub assigncustomrole {
1405: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1406: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1407: $end,$start);
1408: }
1409:
1410: # ----------------------------------------------------------------- Revoke Role
1411:
1412: sub revokerole {
1413: my ($udom,$uname,$url,$role)=@_;
1414: my $now=time;
1415: return &assignrole($udom,$uname,$url,$role,$now);
1416: }
1417:
1418: # ---------------------------------------------------------- Revoke Custom Role
1419:
1420: sub revokecustomrole {
1421: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1422: my $now=time;
1423: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1424: }
1425:
1426: # ------------------------------------------------------------ Directory lister
1427:
1428: sub dirlist {
1429: my $uri=shift;
1430: $uri=~s/^\///;
1431: $uri=~s/\/$//;
1432: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1433: if ($udom) {
1434: if ($uname) {
1435: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1436: homeserver($uname,$udom));
1437: return split(/:/,$listing);
1438: } else {
1439: my $tryserver;
1440: my %allusers=();
1441: foreach $tryserver (keys %libserv) {
1442: if ($hostdom{$tryserver} eq $udom) {
1443: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1444: $tryserver);
1445: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1446: && ($listing ne 'con_lost')) {
1447: map {
1448: my ($entry,@stat)=split(/&/,$_);
1449: $allusers{$entry}=1;
1450: } split(/:/,$listing);
1451: }
1452: }
1453: }
1454: my $alluserstr='';
1455: map {
1456: $alluserstr.=$_.'&user:';
1457: } sort keys %allusers;
1458: $alluserstr=~s/:$//;
1459: return split(/:/,$alluserstr);
1460: }
1461: } else {
1462: my $tryserver;
1463: my %alldom=();
1464: foreach $tryserver (keys %libserv) {
1465: $alldom{$hostdom{$tryserver}}=1;
1466: }
1467: my $alldomstr='';
1468: map {
1469: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1470: } sort keys %alldom;
1471: $alldomstr=~s/:$//;
1472: return split(/:/,$alldomstr);
1473: }
1474: }
1475:
1476: # -------------------------------------------------------- Value of a Condition
1477:
1478: sub directcondval {
1479: my $number=shift;
1480: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1481: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1482: } else {
1483: return 2;
1484: }
1485: }
1486:
1487: sub condval {
1488: my $condidx=shift;
1489: my $result=0;
1490: my $allpathcond='';
1491: map {
1492: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
1493: $allpathcond.=
1494: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
1495: }
1496: } split(/\|/,$condidx);
1497: $allpathcond=~s/\|$//;
1498: if ($ENV{'request.course.id'}) {
1499: if ($allpathcond) {
1500: my $operand='|';
1501: my @stack;
1502: map {
1503: if ($_ eq '(') {
1504: push @stack,($operand,$result)
1505: } elsif ($_ eq ')') {
1506: my $before=pop @stack;
1507: if (pop @stack eq '&') {
1508: $result=$result>$before?$before:$result;
1509: } else {
1510: $result=$result>$before?$result:$before;
1511: }
1512: } elsif (($_ eq '&') || ($_ eq '|')) {
1513: $operand=$_;
1514: } else {
1515: my $new=directcondval($_);
1516: if ($operand eq '&') {
1517: $result=$result>$new?$new:$result;
1518: } else {
1519: $result=$result>$new?$result:$new;
1520: }
1521: }
1522: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
1523: }
1524: }
1525: return $result;
1526: }
1527:
1528: # --------------------------------------------------------- Value of a Variable
1529:
1530: sub EXT {
1531: my $varname=shift;
1532: unless ($varname) { return ''; }
1533: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
1534: my $rest;
1535: if ($therest[0]) {
1536: $rest=join('.',@therest);
1537: } else {
1538: $rest='';
1539: }
1540: my $qualifierrest=$qualifier;
1541: if ($rest) { $qualifierrest.='.'.$rest; }
1542: my $spacequalifierrest=$space;
1543: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1544: if ($realm eq 'user') {
1545: # --------------------------------------------------------------- user.resource
1546: if ($space eq 'resource') {
1547: my %restored=&restore;
1548: return $restored{$qualifierrest};
1549: # ----------------------------------------------------------------- user.access
1550: } elsif ($space eq 'access') {
1551: return &allowed($qualifier,$rest);
1552: # ------------------------------------------ user.preferences, user.environment
1553: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1554: return $ENV{join('.',('environment',$qualifierrest))};
1555: # ----------------------------------------------------------------- user.course
1556: } elsif ($space eq 'course') {
1557: return $ENV{join('.',('request.course',$qualifier))};
1558: # ------------------------------------------------------------------- user.role
1559: } elsif ($space eq 'role') {
1560: my ($role,$where)=split(/\./,$ENV{'request.role'});
1561: if ($qualifier eq 'value') {
1562: return $role;
1563: } elsif ($qualifier eq 'extent') {
1564: return $where;
1565: }
1566: # ----------------------------------------------------------------- user.domain
1567: } elsif ($space eq 'domain') {
1568: return $ENV{'user.domain'};
1569: # ------------------------------------------------------------------- user.name
1570: } elsif ($space eq 'name') {
1571: return $ENV{'user.name'};
1572: # ---------------------------------------------------- Any other user namespace
1573: } else {
1574: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
1575: my %reply=&get($space,$item);
1576: return $reply{$item};
1577: }
1578: } elsif ($realm eq 'request') {
1579: # ------------------------------------------------------------- request.browser
1580: if ($space eq 'browser') {
1581: return $ENV{'browser.'.$qualifier};
1582: # ------------------------------------------------------------ request.filename
1583: } else {
1584: return $ENV{'request.'.$spacequalifierrest};
1585: }
1586: } elsif ($realm eq 'course') {
1587: # ---------------------------------------------------------- course.description
1588: my $section='';
1589: if ($ENV{'request.course.sec'}) {
1590: $section='_'.$ENV{'request.course.sec'};
1591: }
1592: return $ENV{'course.'.$ENV{'request.course.id'}.$section.'.'.
1593: $spacequalifierrest};
1594: } elsif ($realm eq 'resource') {
1595: if ($ENV{'request.course.id'}) {
1596: # ----------------------------------------------------- Cascading lookup scheme
1597: my $symbp=&symbread();
1598: unless ($symbp) {
1599: &logthis('No symb for '.$ENV{'request.filename'});
1600: }
1601: my $mapp=(split(/\_\_\_/,$symbp))[0];
1602:
1603: my $symbparm=$symbp.'.'.$spacequalifierrest;
1604: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
1605:
1606: my $seclevel=
1607: $ENV{'request.course.id'}.'.['.
1608: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
1609: my $seclevelr=
1610: $ENV{'request.course.id'}.'.['.
1611: $ENV{'request.course.sec'}.'].'.$symbparm;
1612: my $seclevelm=
1613: $ENV{'request.course.id'}.'.['.
1614: $ENV{'request.course.sec'}.'].'.$mapparm;
1615:
1616: my $courselevel=
1617: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
1618: my $courselevelr=
1619: $ENV{'request.course.id'}.'.'.$symbparm;
1620: my $courselevelm=
1621: $ENV{'request.course.id'}.'.'.$mapparm;
1622:
1623: # ----------------------------------------------------------- first, check user
1624: my %resourcedata=get('resourcedata',
1625: ($courselevelr,$courselevelm,$courselevel));
1626: if (($resourcedata{$courselevelr}!~/^error\:/) &&
1627: ($resourcedata{$courselevelr}!~/^con_lost/)) {
1628:
1629: if ($resourcedata{$courselevelr}) {
1630: return $resourcedata{$courselevelr}; }
1631: if ($resourcedata{$courselevelm}) {
1632: return $resourcedata{$courselevelm}; }
1633: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
1634:
1635: } else {
1636: if ($resourcedata{$courselevelr}!~/No such file/) {
1637: &logthis("<font color=blue>WARNING:".
1638: " Trying to get resource data for ".$ENV{'user.name'}." at "
1639: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
1640: "</font>");
1641: }
1642: }
1643:
1644: # -------------------------------------------------------- second, check course
1645: my $section='';
1646: if ($ENV{'request.course.sec'}) {
1647: $section='_'.$ENV{'request.course.sec'};
1648: }
1649: my $reply=&reply('get:'.
1650: $ENV{'course.'.$ENV{'request.course.id'}.$section.'.domain'}.':'.
1651: $ENV{'course.'.$ENV{'request.course.id'}.$section.'.num'}.
1652: ':resourcedata:'.
1653: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
1654: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
1655: $ENV{'course.'.$ENV{'request.course.id'}.$section.'.home'});
1656: if ($reply!~/^error\:/) {
1657: map {
1658: if ($_) { return &unescape($_); }
1659: } split(/\&/,$reply);
1660: }
1661: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
1662: &logthis("<font color=blue>WARNING:".
1663: " Getting ".$reply." asking for ".$varname." for ".
1664: $ENV{'course.'.$ENV{'request.course.id'}.$section.'.num'}.
1665: ' at '.
1666: $ENV{'course.'.$ENV{'request.course.id'}.$section.'.domain'}.
1667: ' from '.
1668: $ENV{'course.'.$ENV{'request.course.id'}.$section.'.home'}.
1669: "</font>");
1670: }
1671: # ------------------------------------------------------ third, check map parms
1672: my %parmhash=();
1673: my $thisparm='';
1674: if (tie(%parmhash,'GDBM_File',
1675: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
1676: $thisparm=$parmhash{$symbparm};
1677: untie(%parmhash);
1678: }
1679: if ($thisparm) { return $thisparm; }
1680: }
1681:
1682: # --------------------------------------------- last, look in resource metadata
1683:
1684: $spacequalifierrest=~s/\./\_/;
1685: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
1686: if ($metadata) { return $metadata; }
1687: $metadata=&metadata($ENV{'request.filename'},
1688: 'parameter_'.$spacequalifierrest);
1689: if ($metadata) { return $metadata; }
1690:
1691: # ---------------------------------------------------- Any other user namespace
1692: } elsif ($realm eq 'environment') {
1693: # ----------------------------------------------------------------- environment
1694: return $ENV{$spacequalifierrest};
1695: } elsif ($realm eq 'system') {
1696: # ----------------------------------------------------------------- system.time
1697: if ($space eq 'time') {
1698: return time;
1699: }
1700: }
1701: return '';
1702: }
1703:
1704: # ---------------------------------------------------------------- Get metadata
1705:
1706: sub metadata {
1707: my ($uri,$what)=@_;
1708:
1709: $uri=&declutter($uri);
1710: my $filename=$uri;
1711: $uri=~s/\.meta$//;
1712: unless ($metacache{$uri.':keys'}) {
1713: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
1714: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
1715: my $parser=HTML::TokeParser->new(\$metastring);
1716: my $token;
1717: while ($token=$parser->get_token) {
1718: if ($token->[0] eq 'S') {
1719: my $entry=$token->[1];
1720: my $unikey=$entry;
1721: if (defined($token->[2]->{'part'})) {
1722: $unikey.='_'.$token->[2]->{'part'};
1723: }
1724: if (defined($token->[2]->{'name'})) {
1725: $unikey.='_'.$token->[2]->{'name'};
1726: }
1727: if ($metacache{$uri.':keys'}) {
1728: $metacache{$uri.':keys'}.=','.$unikey;
1729: } else {
1730: $metacache{$uri.':keys'}=$unikey;
1731: }
1732: map {
1733: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
1734: } @{$token->[3]};
1735: unless (
1736: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
1737: ) { $metacache{$uri.':'.$unikey}=
1738: $metacache{$uri.':'.$unikey.'.default'};
1739: }
1740: }
1741: }
1742: }
1743: return $metacache{$uri.':'.$what};
1744: }
1745:
1746: # ------------------------------------------------- Update symbolic store links
1747:
1748: sub symblist {
1749: my ($mapname,%newhash)=@_;
1750: $mapname=declutter($mapname);
1751: my %hash;
1752: if (($ENV{'request.course.fn'}) && (%newhash)) {
1753: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1754: &GDBM_WRCREAT,0640)) {
1755: map {
1756: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
1757: } keys %newhash;
1758: if (untie(%hash)) {
1759: return 'ok';
1760: }
1761: }
1762: }
1763: return 'error';
1764: }
1765:
1766: # ------------------------------------------------------ Return symb list entry
1767:
1768: sub symbread {
1769: my $thisfn=shift;
1770: unless ($thisfn) {
1771: $thisfn=$ENV{'request.filename'};
1772: }
1773: $thisfn=declutter($thisfn);
1774: my %hash;
1775: my %bighash;
1776: my $syval='';
1777: if (($ENV{'request.course.fn'}) && ($thisfn)) {
1778: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1779: &GDBM_READER,0640)) {
1780: $syval=$hash{$thisfn};
1781: untie(%hash);
1782: }
1783: # ---------------------------------------------------------- There was an entry
1784: if ($syval) {
1785: unless ($syval=~/\_\d+$/) {
1786: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
1787: &appenv('request.ambiguous' => $thisfn);
1788: return '';
1789: }
1790: $syval.=$1;
1791: }
1792: } else {
1793: # ------------------------------------------------------- Was not in symb table
1794: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1795: &GDBM_READER,0640)) {
1796: # ---------------------------------------------- Get ID(s) for current resource
1797: my $ids=$bighash{'ids_/res/'.$thisfn};
1798: unless ($ids) {
1799: $ids=$bighash{'ids_/'.$thisfn};
1800: }
1801: if ($ids) {
1802: # ------------------------------------------------------------------- Has ID(s)
1803: my @possibilities=split(/\,/,$ids);
1804: if ($#possibilities==0) {
1805: # ----------------------------------------------- There is only one possibility
1806: my ($mapid,$resid)=split(/\./,$ids);
1807: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
1808: } else {
1809: # ------------------------------------------ There is more than one possibility
1810: my $realpossible=0;
1811: map {
1812: my $file=$bighash{'src_'.$_};
1813: if (&allowed('bre',$file)) {
1814: my ($mapid,$resid)=split(/\./,$_);
1815: if ($bighash{'map_type_'.$mapid} ne 'page') {
1816: $realpossible++;
1817: $syval=declutter($bighash{'map_id_'.$mapid}).
1818: '___'.$resid;
1819: }
1820: }
1821: } @possibilities;
1822: if ($realpossible!=1) { $syval=''; }
1823: }
1824: }
1825: untie(%bighash)
1826: }
1827: }
1828: if ($syval) {
1829: return $syval.'___'.$thisfn;
1830: }
1831: }
1832: &appenv('request.ambiguous' => $thisfn);
1833: return '';
1834: }
1835:
1836: # ---------------------------------------------------------- Return random seed
1837:
1838: sub numval {
1839: my $txt=shift;
1840: $txt=~tr/A-J/0-9/;
1841: $txt=~tr/a-j/0-9/;
1842: $txt=~tr/K-T/0-9/;
1843: $txt=~tr/k-t/0-9/;
1844: $txt=~tr/U-Z/0-5/;
1845: $txt=~tr/u-z/0-5/;
1846: $txt=~s/\D//g;
1847: return int($txt);
1848: }
1849:
1850: sub rndseed {
1851: my $symb;
1852: unless ($symb=&symbread()) { return time; }
1853: my $symbchck=unpack("%32C*",$symb);
1854: my $symbseed=numval($symb)%$symbchck;
1855: my $namechck=unpack("%32C*",$ENV{'user.name'});
1856: my $nameseed=numval($ENV{'user.name'})%$namechck;
1857: return int( $symbseed
1858: .$nameseed
1859: .unpack("%32C*",$ENV{'user.domain'})
1860: .unpack("%32C*",$ENV{'request.course.id'})
1861: .$namechck
1862: .$symbchck);
1863: }
1864:
1865: sub ireceipt {
1866: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
1867: my $cuname=unpack("%32C*",$funame);
1868: my $cudom=unpack("%32C*",$fudom);
1869: my $cucourseid=unpack("%32C*",$fucourseid);
1870: my $cusymb=unpack("%32C*",$fusymb);
1871: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
1872: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
1873: ($cunique%$cuname+
1874: $cunique%$cudom+
1875: $cusymb%$cuname+
1876: $cusymb%$cudom+
1877: $cucourseid%$cuname+
1878: $cucourseid%$cudom);
1879: }
1880:
1881: sub receipt {
1882: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
1883: $ENV{'request.course.id'},&symbread());
1884: }
1885:
1886: # ------------------------------------------------------------ Serves up a file
1887: # returns either the contents of the file or a -1
1888: sub getfile {
1889: my $file=shift;
1890: &repcopy($file);
1891: if (! -e $file ) { return -1; };
1892: my $fh=Apache::File->new($file);
1893: my $a='';
1894: while (<$fh>) { $a .=$_; }
1895: return $a
1896: }
1897:
1898: sub filelocation {
1899: my ($dir,$file) = @_;
1900: my $location;
1901: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
1902: if ($file=~m:^/~:) { # is a contruction space reference
1903: $location = $file;
1904: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
1905: } else {
1906: $file=~s/^$perlvar{'lonDocRoot'}//;
1907: $file=~s:^/*res::;
1908: if ( !( $file =~ m:^/:) ) {
1909: $location = $dir. '/'.$file;
1910: } else {
1911: $location = '/home/httpd/html/res'.$file;
1912: }
1913: }
1914: $location=~s://+:/:g; # remove duplicate /
1915: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
1916: return $location;
1917: }
1918:
1919: sub hreflocation {
1920: my ($dir,$file)=@_;
1921: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
1922: my $finalpath=filelocation($dir,$file);
1923: $finalpath=~s/^\/home\/httpd\/html//;
1924: return $finalpath;
1925: } else {
1926: return $file;
1927: }
1928: }
1929:
1930: # ------------------------------------------------------------- Declutters URLs
1931:
1932: sub declutter {
1933: my $thisfn=shift;
1934: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
1935: $thisfn=~s/^\///;
1936: $thisfn=~s/^res\///;
1937: return $thisfn;
1938: }
1939:
1940: # -------------------------------------------------------- Escape Special Chars
1941:
1942: sub escape {
1943: my $str=shift;
1944: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
1945: return $str;
1946: }
1947:
1948: # ----------------------------------------------------- Un-Escape Special Chars
1949:
1950: sub unescape {
1951: my $str=shift;
1952: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1953: return $str;
1954: }
1955:
1956: # ================================================================ Main Program
1957:
1958: sub BEGIN {
1959: if ($readit ne 'done') {
1960: # ------------------------------------------------------------ Read access.conf
1961: {
1962: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
1963:
1964: while (my $configline=<$config>) {
1965: if ($configline =~ /PerlSetVar/) {
1966: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
1967: chomp($varvalue);
1968: $perlvar{$varname}=$varvalue;
1969: }
1970: }
1971: }
1972:
1973: # ------------------------------------------------------------- Read hosts file
1974: {
1975: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
1976:
1977: while (my $configline=<$config>) {
1978: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
1979: $hostname{$id}=$name;
1980: $hostdom{$id}=$domain;
1981: if ($role eq 'library') { $libserv{$id}=$name; }
1982: }
1983: }
1984:
1985: # ------------------------------------------------------ Read spare server file
1986: {
1987: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
1988:
1989: while (my $configline=<$config>) {
1990: chomp($configline);
1991: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
1992: $spareid{$configline}=1;
1993: }
1994: }
1995: }
1996: # ------------------------------------------------------------ Read permissions
1997: {
1998: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
1999:
2000: while (my $configline=<$config>) {
2001: chomp($configline);
2002: my ($role,$perm)=split(/ /,$configline);
2003: if ($perm ne '') { $pr{$role}=$perm; }
2004: }
2005: }
2006:
2007: # -------------------------------------------- Read plain texts for permissions
2008: {
2009: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2010:
2011: while (my $configline=<$config>) {
2012: chomp($configline);
2013: my ($short,$plain)=split(/:/,$configline);
2014: if ($plain ne '') { $prp{$short}=$plain; }
2015: }
2016: }
2017:
2018: # ------------------------------------------------------------- Read file types
2019: {
2020: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2021:
2022: while (my $configline=<$config>) {
2023: chomp($configline);
2024: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2025: if ($descr[0] ne '') {
2026: $fe{$ending}=$emb;
2027: $fd{$ending}=join(' ',@descr);
2028: }
2029: }
2030: }
2031:
2032: %metacache=();
2033:
2034: $readit='done';
2035: &logthis('<font color=yellow>INFO: Read configuration</font>');
2036: }
2037: }
2038: 1;
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