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