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: # 09/01,10/01,11/01,29/01 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=$cdomain.'_'.$cnum;
697: my %envhash=();
698: my %returnhash=('home' => $chome,
699: 'domain' => $cdomain,
700: 'num' => $cnum);
701: map {
702: my ($name,$value)=split(/\=/,$_);
703: $name=&unescape($name);
704: $value=&unescape($value);
705: $returnhash{$name}=$value;
706: $envhash{'course.'.$normalid.'.'.$name}=$value;
707: } split(/\&/,$rep);
708: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
709: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
710: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
711: $envhash{'course.'.$normalid.'.last_cache'}=time;
712: $envhash{'course.'.$normalid.'.home'}=$chome;
713: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
714: $envhash{'course.'.$normalid.'.num'}=$cnum;
715: &appenv(%envhash);
716: return %returnhash;
717: }
718: }
719: return ();
720: }
721:
722: # -------------------------------------------------------- Get user priviledges
723:
724: sub rolesinit {
725: my ($domain,$username,$authhost)=@_;
726: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
727: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
728: my %allroles=();
729: my %thesepriv=();
730: my $now=time;
731: my $userroles="user.login.time=$now\n";
732: my $thesestr;
733:
734: if ($rolesdump ne '') {
735: map {
736: if ($_!~/^rolesdef\&/) {
737: my ($area,$role)=split(/=/,$_);
738: $area=~s/\_\w\w$//;
739: my ($trole,$tend,$tstart)=split(/_/,$role);
740: $userroles.='user.role.'.$trole.'.'.$area.'='.
741: $tstart.'.'.$tend."\n";
742: if ($tend!=0) {
743: if ($tend<$now) {
744: $trole='';
745: }
746: }
747: if ($tstart!=0) {
748: if ($tstart>$now) {
749: $trole='';
750: }
751: }
752: if (($area ne '') && ($trole ne '')) {
753: my $spec=$trole.'.'.$area;
754: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
755: if ($trole =~ /^cr\//) {
756: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
757: my $homsvr=homeserver($rauthor,$rdomain);
758: if ($hostname{$homsvr} ne '') {
759: my $roledef=
760: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
761: $homsvr);
762: if (($roledef ne 'con_lost') && ($roledef ne '')) {
763: my ($syspriv,$dompriv,$coursepriv)=
764: split(/\_/,unescape($roledef));
765: $allroles{'cm./'}.=':'.$syspriv;
766: $allroles{$spec.'./'}.=':'.$syspriv;
767: if ($tdomain ne '') {
768: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
769: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
770: if ($trest ne '') {
771: $allroles{'cm.'.$area}.=':'.$coursepriv;
772: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
773: }
774: }
775: }
776: }
777: } else {
778: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
779: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
780: if ($tdomain ne '') {
781: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
782: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
783: if ($trest ne '') {
784: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
785: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
786: }
787: }
788: }
789: }
790: }
791: } split(/&/,$rolesdump);
792: map {
793: %thesepriv=();
794: map {
795: if ($_ ne '') {
796: my ($priviledge,$restrictions)=split(/&/,$_);
797: if ($restrictions eq '') {
798: $thesepriv{$priviledge}='F';
799: } else {
800: if ($thesepriv{$priviledge} ne 'F') {
801: $thesepriv{$priviledge}.=$restrictions;
802: }
803: }
804: }
805: } split(/:/,$allroles{$_});
806: $thesestr='';
807: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
808: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
809: } keys %allroles;
810: }
811: return $userroles;
812: }
813:
814: # --------------------------------------------------------------- get interface
815:
816: sub get {
817: my ($namespace,@storearr)=@_;
818: my $items='';
819: map {
820: $items.=escape($_).'&';
821: } @storearr;
822: $items=~s/\&$//;
823: my $rep=reply("get:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
824: $ENV{'user.home'});
825: my @pairs=split(/\&/,$rep);
826: my %returnhash=();
827: my $i=0;
828: map {
829: $returnhash{$_}=unescape($pairs[$i]);
830: $i++;
831: } @storearr;
832: return %returnhash;
833: }
834:
835: # --------------------------------------------------------------- del interface
836:
837: sub del {
838: my ($namespace,@storearr)=@_;
839: my $items='';
840: map {
841: $items.=escape($_).'&';
842: } @storearr;
843: $items=~s/\&$//;
844: return reply("del:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
845: $ENV{'user.home'});
846: }
847:
848: # -------------------------------------------------------------- dump interface
849:
850: sub dump {
851: my $namespace=shift;
852: my $rep=reply("dump:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace",
853: $ENV{'user.home'});
854: my @pairs=split(/\&/,$rep);
855: my %returnhash=();
856: map {
857: my ($key,$value)=split(/=/,$_);
858: $returnhash{unescape($key)}=unescape($value);
859: } @pairs;
860: return %returnhash;
861: }
862:
863: # --------------------------------------------------------------- put interface
864:
865: sub put {
866: my ($namespace,%storehash)=@_;
867: my $items='';
868: map {
869: $items.=escape($_).'='.escape($storehash{$_}).'&';
870: } keys %storehash;
871: $items=~s/\&$//;
872: return reply("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
873: $ENV{'user.home'});
874: }
875:
876: # ------------------------------------------------------ critical put interface
877:
878: sub cput {
879: my ($namespace,%storehash)=@_;
880: my $items='';
881: map {
882: $items.=escape($_).'='.escape($storehash{$_}).'&';
883: } keys %storehash;
884: $items=~s/\&$//;
885: return critical
886: ("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
887: $ENV{'user.home'});
888: }
889:
890: # -------------------------------------------------------------- eget interface
891:
892: sub eget {
893: my ($namespace,@storearr)=@_;
894: my $items='';
895: map {
896: $items.=escape($_).'&';
897: } @storearr;
898: $items=~s/\&$//;
899: my $rep=reply("eget:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
900: $ENV{'user.home'});
901: my @pairs=split(/\&/,$rep);
902: my %returnhash=();
903: my $i=0;
904: map {
905: $returnhash{$_}=unescape($pairs[$i]);
906: $i++;
907: } @storearr;
908: return %returnhash;
909: }
910:
911: # ------------------------------------------------- Check for a user priviledge
912:
913: sub allowed {
914: my ($priv,$uri)=@_;
915: $uri=&declutter($uri);
916:
917: # Free bre access to adm and meta resources
918:
919: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
920: return 'F';
921: }
922:
923: my $thisallowed='';
924: my $statecond=0;
925: my $courseprivid='';
926:
927: # Course
928:
929: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
930: $thisallowed.=$1;
931: }
932:
933: # Domain
934:
935: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
936: =~/$priv\&([^\:]*)/) {
937: $thisallowed.=$1;
938: }
939:
940: # Course: uri itself is a course
941: my $courseuri=$uri;
942: $courseuri=~s/\_(\d)/\/$1/;
943: $courseuri=~s/^([^\/])/\/$1/;
944:
945: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
946: =~/$priv\&([^\:]*)/) {
947: $thisallowed.=$1;
948: }
949:
950: # Full access at system, domain or course-wide level? Exit.
951:
952: if ($thisallowed=~/F/) {
953: return 'F';
954: }
955:
956: # If this is generating or modifying users, exit with special codes
957:
958: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:'=~/\:$priv\:/) {
959: return $thisallowed;
960: }
961: #
962: # Gathered so far: system, domain and course wide priviledges
963: #
964: # Course: See if uri or referer is an individual resource that is part of
965: # the course
966:
967: if ($ENV{'request.course.id'}) {
968: $courseprivid=$ENV{'request.course.id'};
969: if ($ENV{'request.course.sec'}) {
970: $courseprivid.='/'.$ENV{'request.course.sec'};
971: }
972: $courseprivid=~s/\_/\//;
973: my $checkreferer=1;
974: my @uriparts=split(/\//,$uri);
975: my $filename=$uriparts[$#uriparts];
976: my $pathname=$uri;
977: $pathname=~s/\/$filename$//;
978: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
979: /\&$filename\:([\d\|]+)\&/) {
980: $statecond=$1;
981: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
982: =~/$priv\&([^\:]*)/) {
983: $thisallowed.=$1;
984: $checkreferer=0;
985: }
986: }
987:
988: if (($ENV{'HTTP_REFERER'}) && ($checkreferer)) {
989: my $refuri=$ENV{'HTTP_REFERER'};
990: $refuri=~s/^http\:\/\/$ENV{'request.host'}//i;
991: $refuri=&declutter($refuri);
992: my @uriparts=split(/\//,$refuri);
993: my $filename=$uriparts[$#uriparts];
994: my $pathname=$refuri;
995: $pathname=~s/\/$filename$//;
996: my @filenameparts=split(/\./,$uri);
997: if (&fileembstyle($filenameparts[$#filenameparts]) ne 'ssi') {
998: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
999: /\&$filename\:([\d\|]+)\&/) {
1000: my $refstatecond=$1;
1001: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1002: =~/$priv\&([^\:]*)/) {
1003: $thisallowed.=$1;
1004: $uri=$refuri;
1005: $statecond=$refstatecond;
1006: }
1007: }
1008: }
1009: }
1010: }
1011:
1012: #
1013: # Gathered now: all priviledges that could apply, and condition number
1014: #
1015: #
1016: # Full or no access?
1017: #
1018:
1019: if ($thisallowed=~/F/) {
1020: return 'F';
1021: }
1022:
1023: unless ($thisallowed) {
1024: return '';
1025: }
1026:
1027: # Restrictions exist, deal with them
1028: #
1029: # C:according to course preferences
1030: # R:according to resource settings
1031: # L:unless locked
1032: # X:according to user session state
1033: #
1034:
1035: # Possibly locked functionality, check all courses
1036: # Locks might take effect only after 10 minutes cache expiration for other
1037: # courses, and 2 minutes for current course
1038:
1039: my $envkey;
1040: if ($thisallowed=~/L/) {
1041: foreach $envkey (keys %ENV) {
1042: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1043: my $courseid=$2;
1044: my $roleid=$1.'.'.$2;
1045: $courseid=~s/^\///;
1046: my $expiretime=600;
1047: if ($ENV{'request.role'} eq $roleid) {
1048: $expiretime=120;
1049: }
1050: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1051: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1052: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1053: &coursedescription($courseid);
1054: }
1055: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1056: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1057: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1058: &log($ENV{'user.domain'},$ENV{'user.name'},
1059: $ENV{'user.host'},
1060: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1061: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1062: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1063: return '';
1064: }
1065: }
1066: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1067: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1068: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1069: &log($ENV{'user.domain'},$ENV{'user.name'},
1070: $ENV{'user.host'},
1071: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1072: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1073: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1074: return '';
1075: }
1076: }
1077: }
1078: }
1079: }
1080:
1081: #
1082: # Rest of the restrictions depend on selected course
1083: #
1084:
1085: unless ($ENV{'request.course.id'}) {
1086: return '1';
1087: }
1088:
1089: #
1090: # Now user is definitely in a course
1091: #
1092:
1093:
1094: # Course preferences
1095:
1096: if ($thisallowed=~/C/) {
1097: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1098: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1099: =~/\,$rolecode\,/) {
1100: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1101: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1102: $ENV{'request.course.id'});
1103: return '';
1104: }
1105: }
1106:
1107: # Resource preferences
1108:
1109: if ($thisallowed=~/R/) {
1110: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1111: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1112: if (-e $filename) {
1113: my @content;
1114: {
1115: my $fh=Apache::File->new($filename);
1116: @content=<$fh>;
1117: }
1118: if (join('',@content)=~
1119: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1120: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1121: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1122: return '';
1123:
1124: }
1125: }
1126: }
1127:
1128: # Restricted by state?
1129:
1130: if ($thisallowed=~/X/) {
1131: if (&condval($statecond)) {
1132: return '2';
1133: } else {
1134: return '';
1135: }
1136: }
1137:
1138: return 'F';
1139: }
1140:
1141: # ----------------------------------------------------------------- Define Role
1142:
1143: sub definerole {
1144: if (allowed('mcr','/')) {
1145: my ($rolename,$sysrole,$domrole,$courole)=@_;
1146: map {
1147: my ($crole,$cqual)=split(/\&/,$_);
1148: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1149: if ($pr{'cr:s'}=~/$crole\&/) {
1150: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1151: return "refused:s:$crole&$cqual";
1152: }
1153: }
1154: } split('/',$sysrole);
1155: map {
1156: my ($crole,$cqual)=split(/\&/,$_);
1157: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1158: if ($pr{'cr:d'}=~/$crole\&/) {
1159: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1160: return "refused:d:$crole&$cqual";
1161: }
1162: }
1163: } split('/',$domrole);
1164: map {
1165: my ($crole,$cqual)=split(/\&/,$_);
1166: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1167: if ($pr{'cr:c'}=~/$crole\&/) {
1168: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1169: return "refused:c:$crole&$cqual";
1170: }
1171: }
1172: } split('/',$courole);
1173: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1174: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1175: "rolesdef_$rolename=".
1176: escape($sysrole.'_'.$domrole.'_'.$courole);
1177: return reply($command,$ENV{'user.home'});
1178: } else {
1179: return 'refused';
1180: }
1181: }
1182:
1183: # ------------------------------------------------------------------ Plain Text
1184:
1185: sub plaintext {
1186: my $short=shift;
1187: return $prp{$short};
1188: }
1189:
1190: # ------------------------------------------------------------------ Plain Text
1191:
1192: sub fileembstyle {
1193: my $ending=shift;
1194: return $fe{$ending};
1195: }
1196:
1197: # ------------------------------------------------------------ Description Text
1198:
1199: sub filedescription {
1200: my $ending=shift;
1201: return $fd{$ending};
1202: }
1203:
1204: # ----------------------------------------------------------------- Assign Role
1205:
1206: sub assignrole {
1207: my ($udom,$uname,$url,$role,$end,$start)=@_;
1208: my $mrole;
1209: if ($role =~ /^cr\//) {
1210: unless (&allowed('ccr',$url)) { return 'refused'; }
1211: $mrole='cr';
1212: } else {
1213: my $cwosec=$url;
1214: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1215: unless (&allowed('c'.$role,$cwosec)) { return 'refused'; }
1216: $mrole=$role;
1217: }
1218: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1219: "$udom:$uname:$url".'_'."$mrole=$role";
1220: if ($end) { $command.='_'.$end; }
1221: if ($start) {
1222: if ($end) {
1223: $command.='_'.$start;
1224: } else {
1225: $command.='_0_'.$start;
1226: }
1227: }
1228: return &reply($command,&homeserver($uname,$udom));
1229: }
1230:
1231: # --------------------------------------------------------------- Modify a user
1232:
1233:
1234: sub modifyuser {
1235: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1236: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1237: $umode.', '.$first.', '.$middle.', '.
1238: $last.', '.$gene.' by '.
1239: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1240: my $uhome=&homeserver($uname,$udom);
1241: # ----------------------------------------------------------------- Create User
1242: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1243: my $unhome='';
1244: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1245: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1246: } else {
1247: my $tryserver;
1248: my $loadm=10000000;
1249: foreach $tryserver (keys %libserv) {
1250: if ($hostdom{$tryserver} eq $udom) {
1251: my $answer=reply('load',$tryserver);
1252: if (($answer=~/\d+/) && ($answer<$loadm)) {
1253: $loadm=$answer;
1254: $unhome=$tryserver;
1255: }
1256: }
1257: }
1258: }
1259: if (($unhome eq '') || ($unhome eq 'no_host')) {
1260: return 'error: find home';
1261: }
1262: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1263: &escape($upass),$unhome);
1264: unless ($reply eq 'ok') {
1265: return 'error: '.$reply;
1266: }
1267: $uhome=&homeserver($uname,$udom);
1268: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1269: return 'error: verify home';
1270: }
1271: }
1272: # ---------------------------------------------------------------------- Add ID
1273: if ($uid) {
1274: $uid=~tr/A-Z/a-z/;
1275: my %uidhash=&idrget($udom,$uname);
1276: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1277: unless ($uid eq $uidhash{$uname}) {
1278: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1279: }
1280: } else {
1281: &idput($udom,($uname => $uid));
1282: }
1283: }
1284: # -------------------------------------------------------------- Add names, etc
1285: my $names=&reply('get:'.$udom.':'.$uname.
1286: ':environment:firstname&middlename&lastname&generation',
1287: $uhome);
1288: my ($efirst,$emiddle,$elast,$egene)=split(/\&/,$names);
1289: if ($first) { $efirst = &escape($first); }
1290: if ($middle) { $emiddle = &escape($middle); }
1291: if ($last) { $elast = &escape($last); }
1292: if ($gene) { $egene = &escape($gene); }
1293: my $reply=&reply('put:'.$udom.':'.$uname.
1294: ':environment:firstname='.$efirst.
1295: '&middlename='.$emiddle.
1296: '&lastname='.$elast.
1297: '&generation='.$egene,$uhome);
1298: if ($reply ne 'ok') {
1299: return 'error: '.$reply;
1300: }
1301: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1302: $umode.', '.$first.', '.$middle.', '.
1303: $last.', '.$gene.' by '.
1304: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1305: return 'ok';
1306: }
1307:
1308: # -------------------------------------------------------------- Modify student
1309:
1310: sub modifystudent {
1311: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1312: $end,$start)=@_;
1313: my $cid='';
1314: unless ($cid=$ENV{'request.course.id'}) {
1315: return 'not_in_class';
1316: }
1317: # --------------------------------------------------------------- Make the user
1318: my $reply=&modifyuser
1319: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1320: unless ($reply eq 'ok') { return $reply; }
1321: my $uhome=&homeserver($uname,$udom);
1322: if (($uhome eq '') || ($uhome eq 'no_host')) {
1323: return 'error: no such user';
1324: }
1325: # -------------------------------------------------- Add student to course list
1326: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1327: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1328: &escape($uname.':'.$udom).'='.
1329: &escape($end.':'.$start),
1330: $ENV{'course.'.$cid.'.home'});
1331: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1332: return 'error: '.$reply;
1333: }
1334: # ---------------------------------------------------- Add student role to user
1335: my $uurl='/'.$cid;
1336: $uurl=~s/\_/\//g;
1337: if ($usec) {
1338: $uurl.='/'.$usec;
1339: }
1340: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1341: }
1342:
1343: # ------------------------------------------------- Write to course preferences
1344:
1345: sub writecoursepref {
1346: my ($courseid,%prefs)=@_;
1347: $courseid=~s/^\///;
1348: $courseid=~s/\_/\//g;
1349: my ($cdomain,$cnum)=split(/\//,$courseid);
1350: my $chome=homeserver($cnum,$cdomain);
1351: if (($chome eq '') || ($chome eq 'no_host')) {
1352: return 'error: no such course';
1353: }
1354: my $cstring='';
1355: map {
1356: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1357: } keys %prefs;
1358: $cstring=~s/\&$//;
1359: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1360: }
1361:
1362: # ---------------------------------------------------------- Make/modify course
1363:
1364: sub createcourse {
1365: my ($udom,$description,$url)=@_;
1366: $url=&declutter($url);
1367: my $cid='';
1368: unless (&allowed('ccc',$ENV{'user.domain'})) {
1369: return 'refused';
1370: }
1371: unless ($udom eq $ENV{'user.domain'}) {
1372: return 'refused';
1373: }
1374: # ------------------------------------------------------------------- Create ID
1375: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1376: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1377: # ----------------------------------------------- Make sure that does not exist
1378: my $uhome=&homeserver($uname,$udom);
1379: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1380: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1381: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1382: $uhome=&homeserver($uname,$udom);
1383: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1384: return 'error: unable to generate unique course-ID';
1385: }
1386: }
1387: # ------------------------------------------------------------- Make the course
1388: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1389: $ENV{'user.home'});
1390: unless ($reply eq 'ok') { return 'error: '.$reply; }
1391: my $uhome=&homeserver($uname,$udom);
1392: if (($uhome eq '') || ($uhome eq 'no_host')) {
1393: return 'error: no such course';
1394: }
1395: &writecoursepref($udom.'_'.$uname,
1396: ('description' => $description,
1397: 'url' => $url));
1398: return '/'.$udom.'/'.$uname;
1399: }
1400:
1401: # ---------------------------------------------------------- Assign Custom Role
1402:
1403: sub assigncustomrole {
1404: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1405: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1406: $end,$start);
1407: }
1408:
1409: # ----------------------------------------------------------------- Revoke Role
1410:
1411: sub revokerole {
1412: my ($udom,$uname,$url,$role)=@_;
1413: my $now=time;
1414: return &assignrole($udom,$uname,$url,$role,$now);
1415: }
1416:
1417: # ---------------------------------------------------------- Revoke Custom Role
1418:
1419: sub revokecustomrole {
1420: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1421: my $now=time;
1422: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1423: }
1424:
1425: # ------------------------------------------------------------ Directory lister
1426:
1427: sub dirlist {
1428: my $uri=shift;
1429: $uri=~s/^\///;
1430: $uri=~s/\/$//;
1431: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1432: if ($udom) {
1433: if ($uname) {
1434: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1435: homeserver($uname,$udom));
1436: return split(/:/,$listing);
1437: } else {
1438: my $tryserver;
1439: my %allusers=();
1440: foreach $tryserver (keys %libserv) {
1441: if ($hostdom{$tryserver} eq $udom) {
1442: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1443: $tryserver);
1444: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1445: && ($listing ne 'con_lost')) {
1446: map {
1447: my ($entry,@stat)=split(/&/,$_);
1448: $allusers{$entry}=1;
1449: } split(/:/,$listing);
1450: }
1451: }
1452: }
1453: my $alluserstr='';
1454: map {
1455: $alluserstr.=$_.'&user:';
1456: } sort keys %allusers;
1457: $alluserstr=~s/:$//;
1458: return split(/:/,$alluserstr);
1459: }
1460: } else {
1461: my $tryserver;
1462: my %alldom=();
1463: foreach $tryserver (keys %libserv) {
1464: $alldom{$hostdom{$tryserver}}=1;
1465: }
1466: my $alldomstr='';
1467: map {
1468: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1469: } sort keys %alldom;
1470: $alldomstr=~s/:$//;
1471: return split(/:/,$alldomstr);
1472: }
1473: }
1474:
1475: # -------------------------------------------------------- Value of a Condition
1476:
1477: sub directcondval {
1478: my $number=shift;
1479: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1480: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1481: } else {
1482: return 2;
1483: }
1484: }
1485:
1486: sub condval {
1487: my $condidx=shift;
1488: my $result=0;
1489: my $allpathcond='';
1490: map {
1491: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
1492: $allpathcond.=
1493: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
1494: }
1495: } split(/\|/,$condidx);
1496: $allpathcond=~s/\|$//;
1497: if ($ENV{'request.course.id'}) {
1498: if ($allpathcond) {
1499: my $operand='|';
1500: my @stack;
1501: map {
1502: if ($_ eq '(') {
1503: push @stack,($operand,$result)
1504: } elsif ($_ eq ')') {
1505: my $before=pop @stack;
1506: if (pop @stack eq '&') {
1507: $result=$result>$before?$before:$result;
1508: } else {
1509: $result=$result>$before?$result:$before;
1510: }
1511: } elsif (($_ eq '&') || ($_ eq '|')) {
1512: $operand=$_;
1513: } else {
1514: my $new=directcondval($_);
1515: if ($operand eq '&') {
1516: $result=$result>$new?$new:$result;
1517: } else {
1518: $result=$result>$new?$result:$new;
1519: }
1520: }
1521: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
1522: }
1523: }
1524: return $result;
1525: }
1526:
1527: # --------------------------------------------------------- Value of a Variable
1528:
1529: sub EXT {
1530: my ($varname,$psymb)=@_;
1531: unless ($varname) { return ''; }
1532: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
1533: my $rest;
1534: if ($therest[0]) {
1535: $rest=join('.',@therest);
1536: } else {
1537: $rest='';
1538: }
1539: my $qualifierrest=$qualifier;
1540: if ($rest) { $qualifierrest.='.'.$rest; }
1541: my $spacequalifierrest=$space;
1542: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1543: if ($realm eq 'user') {
1544: # --------------------------------------------------------------- user.resource
1545: if ($space eq 'resource') {
1546: my %restored=&restore;
1547: return $restored{$qualifierrest};
1548: # ----------------------------------------------------------------- user.access
1549: } elsif ($space eq 'access') {
1550: return &allowed($qualifier,$rest);
1551: # ------------------------------------------ user.preferences, user.environment
1552: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1553: return $ENV{join('.',('environment',$qualifierrest))};
1554: # ----------------------------------------------------------------- user.course
1555: } elsif ($space eq 'course') {
1556: return $ENV{join('.',('request.course',$qualifier))};
1557: # ------------------------------------------------------------------- user.role
1558: } elsif ($space eq 'role') {
1559: my ($role,$where)=split(/\./,$ENV{'request.role'});
1560: if ($qualifier eq 'value') {
1561: return $role;
1562: } elsif ($qualifier eq 'extent') {
1563: return $where;
1564: }
1565: # ----------------------------------------------------------------- user.domain
1566: } elsif ($space eq 'domain') {
1567: return $ENV{'user.domain'};
1568: # ------------------------------------------------------------------- user.name
1569: } elsif ($space eq 'name') {
1570: return $ENV{'user.name'};
1571: # ---------------------------------------------------- Any other user namespace
1572: } else {
1573: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
1574: my %reply=&get($space,$item);
1575: return $reply{$item};
1576: }
1577: } elsif ($realm eq 'request') {
1578: # ------------------------------------------------------------- request.browser
1579: if ($space eq 'browser') {
1580: return $ENV{'browser.'.$qualifier};
1581: # ------------------------------------------------------------ request.filename
1582: } else {
1583: return $ENV{'request.'.$spacequalifierrest};
1584: }
1585: } elsif ($realm eq 'course') {
1586: # ---------------------------------------------------------- course.description
1587: my $section='';
1588: if ($ENV{'request.course.sec'}) {
1589: $section='_'.$ENV{'request.course.sec'};
1590: }
1591: return $ENV{'course.'.$ENV{'request.course.id'}.$section.'.'.
1592: $spacequalifierrest};
1593: } elsif ($realm eq 'resource') {
1594: if ($ENV{'request.course.id'}) {
1595: # ----------------------------------------------------- Cascading lookup scheme
1596: my $symbp;
1597: if ($psymb) {
1598: $symbp=$psymb;
1599: } else {
1600: $symbp=&symbread();
1601: }
1602: my $mapp=(split(/\_\_\_/,$symbp))[0];
1603:
1604: my $symbparm=$symbp.'.'.$spacequalifierrest;
1605: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
1606:
1607: my $seclevel=
1608: $ENV{'request.course.id'}.'.['.
1609: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
1610: my $seclevelr=
1611: $ENV{'request.course.id'}.'.['.
1612: $ENV{'request.course.sec'}.'].'.$symbparm;
1613: my $seclevelm=
1614: $ENV{'request.course.id'}.'.['.
1615: $ENV{'request.course.sec'}.'].'.$mapparm;
1616:
1617: my $courselevel=
1618: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
1619: my $courselevelr=
1620: $ENV{'request.course.id'}.'.'.$symbparm;
1621: my $courselevelm=
1622: $ENV{'request.course.id'}.'.'.$mapparm;
1623:
1624: # ----------------------------------------------------------- first, check user
1625: my %resourcedata=get('resourcedata',
1626: ($courselevelr,$courselevelm,$courselevel));
1627: if (($resourcedata{$courselevelr}!~/^error\:/) &&
1628: ($resourcedata{$courselevelr}!~/^con_lost/)) {
1629:
1630: if ($resourcedata{$courselevelr}) {
1631: return $resourcedata{$courselevelr}; }
1632: if ($resourcedata{$courselevelm}) {
1633: return $resourcedata{$courselevelm}; }
1634: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
1635:
1636: } else {
1637: if ($resourcedata{$courselevelr}!~/No such file/) {
1638: &logthis("<font color=blue>WARNING:".
1639: " Trying to get resource data for ".$ENV{'user.name'}." at "
1640: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
1641: "</font>");
1642: }
1643: }
1644:
1645: # -------------------------------------------------------- second, check course
1646:
1647: my $reply=&reply('get:'.
1648: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
1649: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1650: ':resourcedata:'.
1651: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
1652: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
1653: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
1654: if ($reply!~/^error\:/) {
1655: map {
1656: if ($_) { return &unescape($_); }
1657: } split(/\&/,$reply);
1658: }
1659: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
1660: &logthis("<font color=blue>WARNING:".
1661: " Getting ".$reply." asking for ".$varname." for ".
1662: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1663: ' at '.
1664: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
1665: ' from '.
1666: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
1667: "</font>");
1668: }
1669: # ------------------------------------------------------ third, check map parms
1670: my %parmhash=();
1671: my $thisparm='';
1672: if (tie(%parmhash,'GDBM_File',
1673: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
1674: $thisparm=$parmhash{$symbparm};
1675: untie(%parmhash);
1676: }
1677: if ($thisparm) { return $thisparm; }
1678: }
1679:
1680: # --------------------------------------------- last, look in resource metadata
1681:
1682: $spacequalifierrest=~s/\./\_/;
1683: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
1684: if ($metadata) { return $metadata; }
1685: $metadata=&metadata($ENV{'request.filename'},
1686: 'parameter_'.$spacequalifierrest);
1687: if ($metadata) { return $metadata; }
1688:
1689: # ---------------------------------------------------- Any other user namespace
1690: } elsif ($realm eq 'environment') {
1691: # ----------------------------------------------------------------- environment
1692: return $ENV{$spacequalifierrest};
1693: } elsif ($realm eq 'system') {
1694: # ----------------------------------------------------------------- system.time
1695: if ($space eq 'time') {
1696: return time;
1697: }
1698: }
1699: return '';
1700: }
1701:
1702: # ---------------------------------------------------------------- Get metadata
1703:
1704: sub metadata {
1705: my ($uri,$what)=@_;
1706:
1707: $uri=&declutter($uri);
1708: my $filename=$uri;
1709: $uri=~s/\.meta$//;
1710: unless ($metacache{$uri.':keys'}) {
1711: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
1712: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
1713: my $parser=HTML::TokeParser->new(\$metastring);
1714: my $token;
1715: while ($token=$parser->get_token) {
1716: if ($token->[0] eq 'S') {
1717: my $entry=$token->[1];
1718: my $unikey=$entry;
1719: if (defined($token->[2]->{'part'})) {
1720: $unikey.='_'.$token->[2]->{'part'};
1721: }
1722: if (defined($token->[2]->{'name'})) {
1723: $unikey.='_'.$token->[2]->{'name'};
1724: }
1725: if ($metacache{$uri.':keys'}) {
1726: $metacache{$uri.':keys'}.=','.$unikey;
1727: } else {
1728: $metacache{$uri.':keys'}=$unikey;
1729: }
1730: map {
1731: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
1732: } @{$token->[3]};
1733: unless (
1734: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
1735: ) { $metacache{$uri.':'.$unikey}=
1736: $metacache{$uri.':'.$unikey.'.default'};
1737: }
1738: }
1739: }
1740: }
1741: return $metacache{$uri.':'.$what};
1742: }
1743:
1744: # ------------------------------------------------- Update symbolic store links
1745:
1746: sub symblist {
1747: my ($mapname,%newhash)=@_;
1748: $mapname=declutter($mapname);
1749: my %hash;
1750: if (($ENV{'request.course.fn'}) && (%newhash)) {
1751: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1752: &GDBM_WRCREAT,0640)) {
1753: map {
1754: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
1755: } keys %newhash;
1756: if (untie(%hash)) {
1757: return 'ok';
1758: }
1759: }
1760: }
1761: return 'error';
1762: }
1763:
1764: # ------------------------------------------------------ Return symb list entry
1765:
1766: sub symbread {
1767: my $thisfn=shift;
1768: unless ($thisfn) {
1769: $thisfn=$ENV{'request.filename'};
1770: }
1771: $thisfn=declutter($thisfn);
1772: my %hash;
1773: my %bighash;
1774: my $syval='';
1775: if (($ENV{'request.course.fn'}) && ($thisfn)) {
1776: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1777: &GDBM_READER,0640)) {
1778: $syval=$hash{$thisfn};
1779: untie(%hash);
1780: }
1781: # ---------------------------------------------------------- There was an entry
1782: if ($syval) {
1783: unless ($syval=~/\_\d+$/) {
1784: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
1785: &appenv('request.ambiguous' => $thisfn);
1786: return '';
1787: }
1788: $syval.=$1;
1789: }
1790: } else {
1791: # ------------------------------------------------------- Was not in symb table
1792: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1793: &GDBM_READER,0640)) {
1794: # ---------------------------------------------- Get ID(s) for current resource
1795: my $ids=$bighash{'ids_/res/'.$thisfn};
1796: unless ($ids) {
1797: $ids=$bighash{'ids_/'.$thisfn};
1798: }
1799: if ($ids) {
1800: # ------------------------------------------------------------------- Has ID(s)
1801: my @possibilities=split(/\,/,$ids);
1802: if ($#possibilities==0) {
1803: # ----------------------------------------------- There is only one possibility
1804: my ($mapid,$resid)=split(/\./,$ids);
1805: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
1806: } else {
1807: # ------------------------------------------ There is more than one possibility
1808: my $realpossible=0;
1809: map {
1810: my $file=$bighash{'src_'.$_};
1811: if (&allowed('bre',$file)) {
1812: my ($mapid,$resid)=split(/\./,$_);
1813: if ($bighash{'map_type_'.$mapid} ne 'page') {
1814: $realpossible++;
1815: $syval=declutter($bighash{'map_id_'.$mapid}).
1816: '___'.$resid;
1817: }
1818: }
1819: } @possibilities;
1820: if ($realpossible!=1) { $syval=''; }
1821: }
1822: }
1823: untie(%bighash)
1824: }
1825: }
1826: if ($syval) {
1827: return $syval.'___'.$thisfn;
1828: }
1829: }
1830: &appenv('request.ambiguous' => $thisfn);
1831: return '';
1832: }
1833:
1834: # ---------------------------------------------------------- Return random seed
1835:
1836: sub numval {
1837: my $txt=shift;
1838: $txt=~tr/A-J/0-9/;
1839: $txt=~tr/a-j/0-9/;
1840: $txt=~tr/K-T/0-9/;
1841: $txt=~tr/k-t/0-9/;
1842: $txt=~tr/U-Z/0-5/;
1843: $txt=~tr/u-z/0-5/;
1844: $txt=~s/\D//g;
1845: return int($txt);
1846: }
1847:
1848: sub rndseed {
1849: my $symb;
1850: unless ($symb=&symbread()) { return time; }
1851: {
1852: use integer;
1853: my $symbchck=unpack("%32C*",$symb) << 27;
1854: my $symbseed=numval($symb) << 22;
1855: my $namechck=unpack("%32C*",$ENV{'user.name'}) << 17;
1856: my $nameseed=numval($ENV{'user.name'}) << 12;
1857: my $domainseed=unpack("%32C*",$ENV{'user.domain'}) << 7;
1858: my $courseseed=unpack("%32C*",$ENV{'request.course.id'});
1859: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
1860: #uncommenting these lines can break things!
1861: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
1862: #&Apache::lonxml::debug("rndseed :$num:$symb");
1863: return $num;
1864: }
1865: }
1866:
1867: sub ireceipt {
1868: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
1869: my $cuname=unpack("%32C*",$funame);
1870: my $cudom=unpack("%32C*",$fudom);
1871: my $cucourseid=unpack("%32C*",$fucourseid);
1872: my $cusymb=unpack("%32C*",$fusymb);
1873: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
1874: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
1875: ($cunique%$cuname+
1876: $cunique%$cudom+
1877: $cusymb%$cuname+
1878: $cusymb%$cudom+
1879: $cucourseid%$cuname+
1880: $cucourseid%$cudom);
1881: }
1882:
1883: sub receipt {
1884: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
1885: $ENV{'request.course.id'},&symbread());
1886: }
1887:
1888: # ------------------------------------------------------------ Serves up a file
1889: # returns either the contents of the file or a -1
1890: sub getfile {
1891: my $file=shift;
1892: &repcopy($file);
1893: if (! -e $file ) { return -1; };
1894: my $fh=Apache::File->new($file);
1895: my $a='';
1896: while (<$fh>) { $a .=$_; }
1897: return $a
1898: }
1899:
1900: sub filelocation {
1901: my ($dir,$file) = @_;
1902: my $location;
1903: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
1904: if ($file=~m:^/~:) { # is a contruction space reference
1905: $location = $file;
1906: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
1907: } else {
1908: $file=~s/^$perlvar{'lonDocRoot'}//;
1909: $file=~s:^/*res::;
1910: if ( !( $file =~ m:^/:) ) {
1911: $location = $dir. '/'.$file;
1912: } else {
1913: $location = '/home/httpd/html/res'.$file;
1914: }
1915: }
1916: $location=~s://+:/:g; # remove duplicate /
1917: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
1918: return $location;
1919: }
1920:
1921: sub hreflocation {
1922: my ($dir,$file)=@_;
1923: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
1924: my $finalpath=filelocation($dir,$file);
1925: $finalpath=~s/^\/home\/httpd\/html//;
1926: return $finalpath;
1927: } else {
1928: return $file;
1929: }
1930: }
1931:
1932: # ------------------------------------------------------------- Declutters URLs
1933:
1934: sub declutter {
1935: my $thisfn=shift;
1936: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
1937: $thisfn=~s/^\///;
1938: $thisfn=~s/^res\///;
1939: return $thisfn;
1940: }
1941:
1942: # -------------------------------------------------------- Escape Special Chars
1943:
1944: sub escape {
1945: my $str=shift;
1946: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
1947: return $str;
1948: }
1949:
1950: # ----------------------------------------------------- Un-Escape Special Chars
1951:
1952: sub unescape {
1953: my $str=shift;
1954: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1955: return $str;
1956: }
1957:
1958: # ================================================================ Main Program
1959:
1960: sub BEGIN {
1961: if ($readit ne 'done') {
1962: # ------------------------------------------------------------ Read access.conf
1963: {
1964: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
1965:
1966: while (my $configline=<$config>) {
1967: if ($configline =~ /PerlSetVar/) {
1968: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
1969: chomp($varvalue);
1970: $perlvar{$varname}=$varvalue;
1971: }
1972: }
1973: }
1974:
1975: # ------------------------------------------------------------- Read hosts file
1976: {
1977: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
1978:
1979: while (my $configline=<$config>) {
1980: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
1981: $hostname{$id}=$name;
1982: $hostdom{$id}=$domain;
1983: if ($role eq 'library') { $libserv{$id}=$name; }
1984: }
1985: }
1986:
1987: # ------------------------------------------------------ Read spare server file
1988: {
1989: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
1990:
1991: while (my $configline=<$config>) {
1992: chomp($configline);
1993: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
1994: $spareid{$configline}=1;
1995: }
1996: }
1997: }
1998: # ------------------------------------------------------------ Read permissions
1999: {
2000: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2001:
2002: while (my $configline=<$config>) {
2003: chomp($configline);
2004: my ($role,$perm)=split(/ /,$configline);
2005: if ($perm ne '') { $pr{$role}=$perm; }
2006: }
2007: }
2008:
2009: # -------------------------------------------- Read plain texts for permissions
2010: {
2011: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2012:
2013: while (my $configline=<$config>) {
2014: chomp($configline);
2015: my ($short,$plain)=split(/:/,$configline);
2016: if ($plain ne '') { $prp{$short}=$plain; }
2017: }
2018: }
2019:
2020: # ------------------------------------------------------------- Read file types
2021: {
2022: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2023:
2024: while (my $configline=<$config>) {
2025: chomp($configline);
2026: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2027: if ($descr[0] ne '') {
2028: $fe{$ending}=$emb;
2029: $fd{$ending}=join(' ',@descr);
2030: }
2031: }
2032: }
2033:
2034: %metacache=();
2035:
2036: $readit='done';
2037: &logthis('<font color=yellow>INFO: Read configuration</font>');
2038: }
2039: }
2040: 1;
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