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