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 privileges in format of lonTabs/roles.tab for
17: # system, domain and course level,
18: # assignrole(udom,uname,url,role,end,start) : give a role to a user for the
19: # level given by url. Optional start and end dates
20: # (leave empty string or zero for "no date")
21: # assigncustomrole (udom,uname,url,rdom,rnam,rolename,end,start) : give a
22: # custom role to a user for the level given by url.
23: # Specify name and domain of role author, and role name
24: # revokerole (udom,uname,url,role) : Revoke a role for url
25: # revokecustomrole (udom,uname,url,rdom,rnam,rolename) : Revoke a custom role
26: # appenv(hash) : adds hash to session environment
27: # delenv(varname) : deletes all environment entries starting with varname
28: # store(hash) : stores hash permanently for this url
29: # cstore(hash) : critical store
30: # restore : returns hash for this url
31: # eget(namesp,array) : returns hash with keys from array filled in from namesp
32: # get(namesp,array) : returns hash with keys from array filled in from namesp
33: # del(namesp,array) : deletes keys out of array from namesp
34: # put(namesp,hash) : stores hash in namesp
35: # cput(namesp,hash) : critical put
36: # dump(namesp) : dumps the complete namespace into a hash
37: # ssi(url,hash) : does a complete request cycle on url to localhost, posts
38: # hash
39: # coursedescription(id) : returns and caches course description for id
40: # repcopy(filename) : replicate file
41: # dirlist(url) : gets a directory listing
42: # directcondval(index) : reading condition value of single condition from
43: # state string
44: # condval(index) : value of condition index based on state
45: # EXT(name) : value of a variable
46: # symblist(map,hash) : Updates symbolic storage links
47: # symbread([filename]) : returns the data handle (filename optional)
48: # rndseed() : returns a random seed
49: # receipt() : returns a receipt to be given out to users
50: # getfile(filename) : returns the contents of filename, or a -1 if it can't
51: # be found, replicates and subscribes to the file
52: # filelocation(dir,file) : returns a farily clean absolute reference to file
53: # from the directory dir
54: # hreflocation(dir,file) : same as filelocation, but for hrefs
55: # log(domain,user,home,msg) : write to permanent log for user
56: # usection(domain,user,courseid) : output of section name/number or '' for
57: # "not in course" and '-1' for "no section"
58: # userenvironment(domain,user,what) : puts out any environment parameter
59: # for a user
60: # idput(domain,hash) : writes IDs for users from hash (name=>id,name=>id)
61: # idget(domain,array): returns hash with usernames (id=>name,id=>name) for
62: # an array of IDs
63: # idrget(domain,array): returns hash with IDs for usernames (name=>id,...) for
64: # an array of names
65: # metadata(file,entry): returns the metadata entry for a file. entry='keys'
66: # returns a comma separated list of keys
67: #
68: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
69: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
70: # 11/8,11/16,11/18,11/22,11/23,12/22,
71: # 01/06,01/13,02/24,02/28,02/29,
72: # 03/01,03/02,03/06,03/07,03/13,
73: # 04/05,05/29,05/31,06/01,
74: # 06/05,06/26 Gerd Kortemeyer
75: # 06/26 Ben Tyszka
76: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
77: # 08/14 Ben Tyszka
78: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
79: # 10/04 Gerd Kortemeyer
80: # 10/04 Guy Albertelli
81: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
82: # 10/30,10/31,
83: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
84: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
85: # 05/01/01 Guy Albertelli
86: # 05/01,06/01,09/01 Gerd Kortemeyer
87: # 09/01 Guy Albertelli
88: # 09/01,10/01,11/01 Gerd Kortemeyer
89: # 02/27/01 Scott Harrison
90: # 3/2 Gerd Kortemeyer
91: # 3/15 Scott Harrison
92:
93: package Apache::lonnet;
94:
95: use strict;
96: use Apache::File;
97: use LWP::UserAgent();
98: use HTTP::Headers;
99: use vars
100: qw(%perlvar %hostname %homecache %spareid %hostdom %libserv %pr %prp %fe %fd $readit %metacache);
101: use IO::Socket;
102: use GDBM_File;
103: use Apache::Constants qw(:common :http);
104: use HTML::TokeParser;
105: use Fcntl qw(:flock);
106:
107: # --------------------------------------------------------------------- Logging
108:
109: sub logthis {
110: my $message=shift;
111: my $execdir=$perlvar{'lonDaemons'};
112: my $now=time;
113: my $local=localtime($now);
114: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
115: print $fh "$local ($$): $message\n";
116: return 1;
117: }
118:
119: sub logperm {
120: my $message=shift;
121: my $execdir=$perlvar{'lonDaemons'};
122: my $now=time;
123: my $local=localtime($now);
124: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
125: print $fh "$now:$message:$local\n";
126: return 1;
127: }
128:
129: # -------------------------------------------------- Non-critical communication
130: sub subreply {
131: my ($cmd,$server)=@_;
132: my $peerfile="$perlvar{'lonSockDir'}/$server";
133: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
134: Type => SOCK_STREAM,
135: Timeout => 10)
136: or return "con_lost";
137: print $client "$cmd\n";
138: my $answer=<$client>;
139: if (!$answer) { $answer="con_lost"; }
140: chomp($answer);
141: return $answer;
142: }
143:
144: sub reply {
145: my ($cmd,$server)=@_;
146: my $answer=subreply($cmd,$server);
147: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
148: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
149: &logthis("<font color=blue>WARNING:".
150: " $cmd to $server returned $answer</font>");
151: }
152: return $answer;
153: }
154:
155: # ----------------------------------------------------------- Send USR1 to lonc
156:
157: sub reconlonc {
158: my $peerfile=shift;
159: &logthis("Trying to reconnect for $peerfile");
160: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
161: if (my $fh=Apache::File->new("$loncfile")) {
162: my $loncpid=<$fh>;
163: chomp($loncpid);
164: if (kill 0 => $loncpid) {
165: &logthis("lonc at pid $loncpid responding, sending USR1");
166: kill USR1 => $loncpid;
167: sleep 1;
168: if (-e "$peerfile") { return; }
169: &logthis("$peerfile still not there, give it another try");
170: sleep 5;
171: if (-e "$peerfile") { return; }
172: &logthis(
173: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
174: } else {
175: &logthis(
176: "<font color=blue>WARNING:".
177: " lonc at pid $loncpid not responding, giving up</font>");
178: }
179: } else {
180: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
181: }
182: }
183:
184: # ------------------------------------------------------ Critical communication
185:
186: sub critical {
187: my ($cmd,$server)=@_;
188: unless ($hostname{$server}) {
189: &logthis("<font color=blue>WARNING:".
190: " Critical message to unknown server ($server)</font>");
191: return 'no_such_host';
192: }
193: my $answer=reply($cmd,$server);
194: if ($answer eq 'con_lost') {
195: my $pingreply=reply('ping',$server);
196: &reconlonc("$perlvar{'lonSockDir'}/$server");
197: my $pongreply=reply('pong',$server);
198: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
199: $answer=reply($cmd,$server);
200: if ($answer eq 'con_lost') {
201: my $now=time;
202: my $middlename=$cmd;
203: $middlename=substr($middlename,0,16);
204: $middlename=~s/\W//g;
205: my $dfilename=
206: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
207: {
208: my $dfh;
209: if ($dfh=Apache::File->new(">$dfilename")) {
210: print $dfh "$cmd\n";
211: }
212: }
213: sleep 2;
214: my $wcmd='';
215: {
216: my $dfh;
217: if ($dfh=Apache::File->new("$dfilename")) {
218: $wcmd=<$dfh>;
219: }
220: }
221: chomp($wcmd);
222: if ($wcmd eq $cmd) {
223: &logthis("<font color=blue>WARNING: ".
224: "Connection buffer $dfilename: $cmd</font>");
225: &logperm("D:$server:$cmd");
226: return 'con_delayed';
227: } else {
228: &logthis("<font color=red>CRITICAL:"
229: ." Critical connection failed: $server $cmd</font>");
230: &logperm("F:$server:$cmd");
231: return 'con_failed';
232: }
233: }
234: }
235: return $answer;
236: }
237:
238: # ---------------------------------------------------------- Append Environment
239:
240: sub appenv {
241: my %newenv=@_;
242: map {
243: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
244: &logthis("<font color=blue>WARNING: ".
245: "Attempt to modify environment ".$_." to ".$newenv{$_});
246: delete($newenv{$_});
247: } else {
248: $ENV{$_}=$newenv{$_};
249: }
250: } keys %newenv;
251:
252: my $lockfh;
253: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
254: return 'error: '.$!;
255: }
256: unless (flock($lockfh,LOCK_EX)) {
257: &logthis("<font color=blue>WARNING: ".
258: 'Could not obtain exclusive lock in appenv: '.$!);
259: $lockfh->close();
260: return 'error: '.$!;
261: }
262:
263: my @oldenv;
264: {
265: my $fh;
266: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
267: return 'error: '.$!;
268: }
269: @oldenv=<$fh>;
270: $fh->close();
271: }
272: for (my $i=0; $i<=$#oldenv; $i++) {
273: chomp($oldenv[$i]);
274: if ($oldenv[$i] ne '') {
275: my ($name,$value)=split(/=/,$oldenv[$i]);
276: unless (defined($newenv{$name})) {
277: $newenv{$name}=$value;
278: }
279: }
280: }
281: {
282: my $fh;
283: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
284: return 'error';
285: }
286: my $newname;
287: foreach $newname (keys %newenv) {
288: print $fh "$newname=$newenv{$newname}\n";
289: }
290: $fh->close();
291: }
292:
293: $lockfh->close();
294: return 'ok';
295: }
296: # ----------------------------------------------------- Delete from Environment
297:
298: sub delenv {
299: my $delthis=shift;
300: my %newenv=();
301: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
302: &logthis("<font color=blue>WARNING: ".
303: "Attempt to delete from environment ".$delthis);
304: return 'error';
305: }
306: my @oldenv;
307: {
308: my $fh;
309: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
310: return 'error';
311: }
312: unless (flock($fh,LOCK_SH)) {
313: &logthis("<font color=blue>WARNING: ".
314: 'Could not obtain shared lock in delenv: '.$!);
315: $fh->close();
316: return 'error: '.$!;
317: }
318: @oldenv=<$fh>;
319: $fh->close();
320: }
321: {
322: my $fh;
323: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
324: return 'error';
325: }
326: unless (flock($fh,LOCK_EX)) {
327: &logthis("<font color=blue>WARNING: ".
328: 'Could not obtain exclusive lock in delenv: '.$!);
329: $fh->close();
330: return 'error: '.$!;
331: }
332: map {
333: unless ($_=~/^$delthis/) { print $fh $_; }
334: } @oldenv;
335: $fh->close();
336: }
337: return 'ok';
338: }
339:
340: # ------------------------------ Find server with least workload from spare.tab
341:
342: sub spareserver {
343: my $tryserver;
344: my $spareserver='';
345: my $lowestserver=100;
346: foreach $tryserver (keys %spareid) {
347: my $answer=reply('load',$tryserver);
348: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
349: $spareserver="http://$hostname{$tryserver}";
350: $lowestserver=$answer;
351: }
352: }
353: return $spareserver;
354: }
355:
356: # --------- Try to authenticate user from domain's lib servers (first this one)
357:
358: sub authenticate {
359: my ($uname,$upass,$udom)=@_;
360: $upass=escape($upass);
361: if (($perlvar{'lonRole'} eq 'library') &&
362: ($udom eq $perlvar{'lonDefDomain'})) {
363: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
364: if ($answer =~ /authorized/) {
365: if ($answer eq 'authorized') {
366: &logthis("User $uname at $udom authorized by local server");
367: return $perlvar{'lonHostID'};
368: }
369: if ($answer eq 'non_authorized') {
370: &logthis("User $uname at $udom rejected by local server");
371: return 'no_host';
372: }
373: }
374: }
375:
376: my $tryserver;
377: foreach $tryserver (keys %libserv) {
378: if ($hostdom{$tryserver} eq $udom) {
379: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
380: if ($answer =~ /authorized/) {
381: if ($answer eq 'authorized') {
382: &logthis("User $uname at $udom authorized by $tryserver");
383: return $tryserver;
384: }
385: if ($answer eq 'non_authorized') {
386: &logthis("User $uname at $udom rejected by $tryserver");
387: return 'no_host';
388: }
389: }
390: }
391: }
392: &logthis("User $uname at $udom could not be authenticated");
393: return 'no_host';
394: }
395:
396: # ---------------------- Find the homebase for a user from domain's lib servers
397:
398: sub homeserver {
399: my ($uname,$udom)=@_;
400:
401: my $index="$uname:$udom";
402: if ($homecache{$index}) { return "$homecache{$index}"; }
403:
404: my $tryserver;
405: foreach $tryserver (keys %libserv) {
406: if ($hostdom{$tryserver} eq $udom) {
407: my $answer=reply("home:$udom:$uname",$tryserver);
408: if ($answer eq 'found') {
409: $homecache{$index}=$tryserver;
410: return $tryserver;
411: }
412: }
413: }
414: return 'no_host';
415: }
416:
417: # ------------------------------------- Find the usernames behind a list of IDs
418:
419: sub idget {
420: my ($udom,@ids)=@_;
421: my %returnhash=();
422:
423: my $tryserver;
424: foreach $tryserver (keys %libserv) {
425: if ($hostdom{$tryserver} eq $udom) {
426: my $idlist=join('&',@ids);
427: $idlist=~tr/A-Z/a-z/;
428: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
429: my @answer=();
430: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
431: @answer=split(/\&/,$reply);
432: } ;
433: my $i;
434: for ($i=0;$i<=$#ids;$i++) {
435: if ($answer[$i]) {
436: $returnhash{$ids[$i]}=$answer[$i];
437: }
438: }
439: }
440: }
441: return %returnhash;
442: }
443:
444: # ------------------------------------- Find the IDs behind a list of usernames
445:
446: sub idrget {
447: my ($udom,@unames)=@_;
448: my %returnhash=();
449: map {
450: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
451: } @unames;
452: return %returnhash;
453: }
454:
455: # ------------------------------- Store away a list of names and associated IDs
456:
457: sub idput {
458: my ($udom,%ids)=@_;
459: my %servers=();
460: map {
461: my $uhom=&homeserver($_,$udom);
462: if ($uhom ne 'no_host') {
463: my $id=&escape($ids{$_});
464: $id=~tr/A-Z/a-z/;
465: my $unam=&escape($_);
466: if ($servers{$uhom}) {
467: $servers{$uhom}.='&'.$id.'='.$unam;
468: } else {
469: $servers{$uhom}=$id.'='.$unam;
470: }
471: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
472: }
473: } keys %ids;
474: map {
475: &critical('idput:'.$udom.':'.$servers{$_},$_);
476: } keys %servers;
477: }
478:
479: # ------------------------------------- Find the section of student in a course
480:
481: sub usection {
482: my ($udom,$unam,$courseid)=@_;
483: $courseid=~s/\_/\//g;
484: $courseid=~s/^(\w)/\/$1/;
485: map {
486: my ($key,$value)=split(/\=/,$_);
487: $key=&unescape($key);
488: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
489: my $section=$1;
490: if ($key eq $courseid.'_st') { $section=''; }
491: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
492: my $now=time;
493: my $notactive=0;
494: if ($start) {
495: if ($now<$start) { $notactive=1; }
496: }
497: if ($end) {
498: if ($now>$end) { $notactive=1; }
499: }
500: unless ($notactive) { return $section; }
501: }
502: } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
503: &homeserver($unam,$udom)));
504: return '-1';
505: }
506:
507: # ------------------------------------- Read an entry from a user's environment
508:
509: sub userenvironment {
510: my ($udom,$unam,@what)=@_;
511: my %returnhash=();
512: my @answer=split(/\&/,
513: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
514: &homeserver($unam,$udom)));
515: my $i;
516: for ($i=0;$i<=$#what;$i++) {
517: $returnhash{$what[$i]}=&unescape($answer[$i]);
518: }
519: return %returnhash;
520: }
521:
522: # ----------------------------- Subscribe to a resource, return URL if possible
523:
524: sub subscribe {
525: my $fname=shift;
526: my $author=$fname;
527: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
528: my ($udom,$uname)=split(/\//,$author);
529: my $home=homeserver($uname,$udom);
530: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
531: return 'not_found';
532: }
533: my $answer=reply("sub:$fname",$home);
534: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
535: $answer.=' by '.$home;
536: }
537: return $answer;
538: }
539:
540: # -------------------------------------------------------------- Replicate file
541:
542: sub repcopy {
543: my $filename=shift;
544: $filename=~s/\/+/\//g;
545: my $transname="$filename.in.transfer";
546: if ((-e $filename) || (-e $transname)) { return OK; }
547: my $remoteurl=subscribe($filename);
548: if ($remoteurl =~ /^con_lost by/) {
549: &logthis("Subscribe returned $remoteurl: $filename");
550: return HTTP_SERVICE_UNAVAILABLE;
551: } elsif ($remoteurl eq 'not_found') {
552: &logthis("Subscribe returned not_found: $filename");
553: return HTTP_NOT_FOUND;
554: } elsif ($remoteurl =~ /^rejected by/) {
555: &logthis("Subscribe returned $remoteurl: $filename");
556: return FORBIDDEN;
557: } elsif ($remoteurl eq 'directory') {
558: return OK;
559: } else {
560: my @parts=split(/\//,$filename);
561: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
562: if ($path ne "$perlvar{'lonDocRoot'}/res") {
563: &logthis("Malconfiguration for replication: $filename");
564: return HTTP_BAD_REQUEST;
565: }
566: my $count;
567: for ($count=5;$count<$#parts;$count++) {
568: $path.="/$parts[$count]";
569: if ((-e $path)!=1) {
570: mkdir($path,0777);
571: }
572: }
573: my $ua=new LWP::UserAgent;
574: my $request=new HTTP::Request('GET',"$remoteurl");
575: my $response=$ua->request($request,$transname);
576: if ($response->is_error()) {
577: unlink($transname);
578: my $message=$response->status_line;
579: &logthis("<font color=blue>WARNING:"
580: ." LWP get: $message: $filename</font>");
581: return HTTP_SERVICE_UNAVAILABLE;
582: } else {
583: if ($remoteurl!~/\.meta$/) {
584: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
585: my $mresponse=$ua->request($mrequest,$filename.'.meta');
586: if ($mresponse->is_error()) {
587: unlink($filename.'.meta');
588: &logthis(
589: "<font color=yellow>INFO: No metadata: $filename</font>");
590: }
591: }
592: rename($transname,$filename);
593: return OK;
594: }
595: }
596: }
597:
598: # --------------------------------------------------------- Server Side Include
599:
600: sub ssi {
601:
602: my ($fn,%form)=@_;
603:
604: my $ua=new LWP::UserAgent;
605:
606: my $request;
607:
608: if (%form) {
609: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
610: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
611: } else {
612: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
613: }
614:
615: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
616: my $response=$ua->request($request);
617:
618: return $response->content;
619: }
620:
621: # ------------------------------------------------------------------------- Log
622:
623: sub log {
624: my ($dom,$nam,$hom,$what)=@_;
625: return critical("log:$dom:$nam:$what",$hom);
626: }
627:
628: # ----------------------------------------------------------------------- Store
629:
630: sub store {
631: my %storehash=@_;
632: my $symb;
633: unless ($symb=escape(&symbread())) { return ''; }
634: my $namespace;
635: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
636: my $namevalue='';
637: map {
638: $namevalue.=escape($_).'='.escape($storehash{$_}).'&';
639: } keys %storehash;
640: $namevalue=~s/\&$//;
641: return reply(
642: "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
643: "$ENV{'user.home'}");
644: }
645:
646: # -------------------------------------------------------------- Critical Store
647:
648: sub cstore {
649: my %storehash=@_;
650: my $symb;
651: unless ($symb=escape(&symbread())) { return ''; }
652: my $namespace;
653: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
654: my $namevalue='';
655: map {
656: $namevalue.=escape($_).'='.escape($storehash{$_}).'&';
657: } keys %storehash;
658: $namevalue=~s/\&$//;
659: return critical(
660: "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
661: "$ENV{'user.home'}");
662: }
663:
664: # --------------------------------------------------------------------- Restore
665:
666: sub restore {
667: my $symb;
668: unless ($symb=escape(&symbread())) { return ''; }
669: my $namespace;
670: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
671: my $answer=reply(
672: "restore:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb",
673: "$ENV{'user.home'}");
674: my %returnhash=();
675: map {
676: my ($name,$value)=split(/\=/,$_);
677: $returnhash{&unescape($name)}=&unescape($value);
678: } split(/\&/,$answer);
679: my $version;
680: for ($version=1;$version<=$returnhash{'version'};$version++) {
681: map {
682: $returnhash{$_}=$returnhash{$version.':'.$_};
683: } split(/\:/,$returnhash{$version.':keys'});
684: }
685: return %returnhash;
686: }
687:
688: # ---------------------------------------------------------- Course Description
689:
690: sub coursedescription {
691: my $courseid=shift;
692: $courseid=~s/^\///;
693: $courseid=~s/\_/\//g;
694: my ($cdomain,$cnum)=split(/\//,$courseid);
695: my $chome=homeserver($cnum,$cdomain);
696: if ($chome ne 'no_host') {
697: my $rep=reply("dump:$cdomain:$cnum:environment",$chome);
698: if ($rep ne 'con_lost') {
699: my $normalid=$cdomain.'_'.$cnum;
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 privileges
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 ($privilege,$restrictions)=split(/&/,$_);
800: if ($restrictions eq '') {
801: $thesepriv{$privilege}='F';
802: } else {
803: if ($thesepriv{$privilege} ne 'F') {
804: $thesepriv{$privilege}.=$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 privilege
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 privileges
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 privileges 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: $courseid=~s/^\///;
1049: my $expiretime=600;
1050: if ($ENV{'request.role'} eq $roleid) {
1051: $expiretime=120;
1052: }
1053: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1054: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1055: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1056: &coursedescription($courseid);
1057: }
1058: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1059: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1060: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1061: &log($ENV{'user.domain'},$ENV{'user.name'},
1062: $ENV{'user.host'},
1063: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1064: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1065: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1066: return '';
1067: }
1068: }
1069: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1070: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1071: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1072: &log($ENV{'user.domain'},$ENV{'user.name'},
1073: $ENV{'user.host'},
1074: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1075: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1076: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1077: return '';
1078: }
1079: }
1080: }
1081: }
1082: }
1083:
1084: #
1085: # Rest of the restrictions depend on selected course
1086: #
1087:
1088: unless ($ENV{'request.course.id'}) {
1089: return '1';
1090: }
1091:
1092: #
1093: # Now user is definitely in a course
1094: #
1095:
1096:
1097: # Course preferences
1098:
1099: if ($thisallowed=~/C/) {
1100: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1101: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1102: =~/\,$rolecode\,/) {
1103: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1104: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1105: $ENV{'request.course.id'});
1106: return '';
1107: }
1108: }
1109:
1110: # Resource preferences
1111:
1112: if ($thisallowed=~/R/) {
1113: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1114: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1115: if (-e $filename) {
1116: my @content;
1117: {
1118: my $fh=Apache::File->new($filename);
1119: @content=<$fh>;
1120: }
1121: if (join('',@content)=~
1122: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1123: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1124: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1125: return '';
1126:
1127: }
1128: }
1129: }
1130:
1131: # Restricted by state?
1132:
1133: if ($thisallowed=~/X/) {
1134: if (&condval($statecond)) {
1135: return '2';
1136: } else {
1137: return '';
1138: }
1139: }
1140:
1141: return 'F';
1142: }
1143:
1144: # ----------------------------------------------------------------- Define Role
1145:
1146: sub definerole {
1147: if (allowed('mcr','/')) {
1148: my ($rolename,$sysrole,$domrole,$courole)=@_;
1149: map {
1150: my ($crole,$cqual)=split(/\&/,$_);
1151: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1152: if ($pr{'cr:s'}=~/$crole\&/) {
1153: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1154: return "refused:s:$crole&$cqual";
1155: }
1156: }
1157: } split('/',$sysrole);
1158: map {
1159: my ($crole,$cqual)=split(/\&/,$_);
1160: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1161: if ($pr{'cr:d'}=~/$crole\&/) {
1162: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1163: return "refused:d:$crole&$cqual";
1164: }
1165: }
1166: } split('/',$domrole);
1167: map {
1168: my ($crole,$cqual)=split(/\&/,$_);
1169: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1170: if ($pr{'cr:c'}=~/$crole\&/) {
1171: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1172: return "refused:c:$crole&$cqual";
1173: }
1174: }
1175: } split('/',$courole);
1176: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1177: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1178: "rolesdef_$rolename=".
1179: escape($sysrole.'_'.$domrole.'_'.$courole);
1180: return reply($command,$ENV{'user.home'});
1181: } else {
1182: return 'refused';
1183: }
1184: }
1185:
1186: # ---------------- Make a metadata query against the network of library servers
1187:
1188: sub metadata_query {
1189: my ($query)=@_;
1190: my $reply=&reply("querysend:$query",'msul3');
1191: }
1192:
1193: # ------------------------------------------------------------------ Plain Text
1194:
1195: sub plaintext {
1196: my $short=shift;
1197: return $prp{$short};
1198: }
1199:
1200: # ------------------------------------------------------------------ Plain Text
1201:
1202: sub fileembstyle {
1203: my $ending=shift;
1204: return $fe{$ending};
1205: }
1206:
1207: # ------------------------------------------------------------ Description Text
1208:
1209: sub filedescription {
1210: my $ending=shift;
1211: return $fd{$ending};
1212: }
1213:
1214: # ----------------------------------------------------------------- Assign Role
1215:
1216: sub assignrole {
1217: my ($udom,$uname,$url,$role,$end,$start)=@_;
1218: my $mrole;
1219: if ($role =~ /^cr\//) {
1220: unless (&allowed('ccr',$url)) {
1221: &logthis('Refused custom assignrole: '.
1222: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1223: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1224: return 'refused';
1225: }
1226: $mrole='cr';
1227: } else {
1228: my $cwosec=$url;
1229: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1230: unless (&allowed('c'.$role,$cwosec)) {
1231: &logthis('Refused assignrole: '.
1232: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1233: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1234: return 'refused';
1235: }
1236: $mrole=$role;
1237: }
1238: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1239: "$udom:$uname:$url".'_'."$mrole=$role";
1240: if ($end) { $command.='_'.$end; }
1241: if ($start) {
1242: if ($end) {
1243: $command.='_'.$start;
1244: } else {
1245: $command.='_0_'.$start;
1246: }
1247: }
1248: return &reply($command,&homeserver($uname,$udom));
1249: }
1250:
1251: # --------------------------------------------------------------- Modify a user
1252:
1253:
1254: sub modifyuser {
1255: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1256: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1257: $umode.', '.$first.', '.$middle.', '.
1258: $last.', '.$gene.' by '.
1259: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1260: my $uhome=&homeserver($uname,$udom);
1261: # ----------------------------------------------------------------- Create User
1262: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1263: my $unhome='';
1264: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1265: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1266: } else {
1267: my $tryserver;
1268: my $loadm=10000000;
1269: foreach $tryserver (keys %libserv) {
1270: if ($hostdom{$tryserver} eq $udom) {
1271: my $answer=reply('load',$tryserver);
1272: if (($answer=~/\d+/) && ($answer<$loadm)) {
1273: $loadm=$answer;
1274: $unhome=$tryserver;
1275: }
1276: }
1277: }
1278: }
1279: if (($unhome eq '') || ($unhome eq 'no_host')) {
1280: return 'error: find home';
1281: }
1282: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1283: &escape($upass),$unhome);
1284: unless ($reply eq 'ok') {
1285: return 'error: '.$reply;
1286: }
1287: $uhome=&homeserver($uname,$udom);
1288: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1289: return 'error: verify home';
1290: }
1291: }
1292: # ---------------------------------------------------------------------- Add ID
1293: if ($uid) {
1294: $uid=~tr/A-Z/a-z/;
1295: my %uidhash=&idrget($udom,$uname);
1296: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1297: unless ($uid eq $uidhash{$uname}) {
1298: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1299: }
1300: } else {
1301: &idput($udom,($uname => $uid));
1302: }
1303: }
1304: # -------------------------------------------------------------- Add names, etc
1305: my $names=&reply('get:'.$udom.':'.$uname.
1306: ':environment:firstname&middlename&lastname&generation',
1307: $uhome);
1308: my ($efirst,$emiddle,$elast,$egene)=split(/\&/,$names);
1309: if ($first) { $efirst = &escape($first); }
1310: if ($middle) { $emiddle = &escape($middle); }
1311: if ($last) { $elast = &escape($last); }
1312: if ($gene) { $egene = &escape($gene); }
1313: my $reply=&reply('put:'.$udom.':'.$uname.
1314: ':environment:firstname='.$efirst.
1315: '&middlename='.$emiddle.
1316: '&lastname='.$elast.
1317: '&generation='.$egene,$uhome);
1318: if ($reply ne 'ok') {
1319: return 'error: '.$reply;
1320: }
1321: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1322: $umode.', '.$first.', '.$middle.', '.
1323: $last.', '.$gene.' by '.
1324: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1325: return 'ok';
1326: }
1327:
1328: # -------------------------------------------------------------- Modify student
1329:
1330: sub modifystudent {
1331: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1332: $end,$start)=@_;
1333: my $cid='';
1334: unless ($cid=$ENV{'request.course.id'}) {
1335: return 'not_in_class';
1336: }
1337: # --------------------------------------------------------------- Make the user
1338: my $reply=&modifyuser
1339: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1340: unless ($reply eq 'ok') { return $reply; }
1341: my $uhome=&homeserver($uname,$udom);
1342: if (($uhome eq '') || ($uhome eq 'no_host')) {
1343: return 'error: no such user';
1344: }
1345: # -------------------------------------------------- Add student to course list
1346: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1347: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1348: &escape($uname.':'.$udom).'='.
1349: &escape($end.':'.$start),
1350: $ENV{'course.'.$cid.'.home'});
1351: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1352: return 'error: '.$reply;
1353: }
1354: # ---------------------------------------------------- Add student role to user
1355: my $uurl='/'.$cid;
1356: $uurl=~s/\_/\//g;
1357: if ($usec) {
1358: $uurl.='/'.$usec;
1359: }
1360: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1361: }
1362:
1363: # ------------------------------------------------- Write to course preferences
1364:
1365: sub writecoursepref {
1366: my ($courseid,%prefs)=@_;
1367: $courseid=~s/^\///;
1368: $courseid=~s/\_/\//g;
1369: my ($cdomain,$cnum)=split(/\//,$courseid);
1370: my $chome=homeserver($cnum,$cdomain);
1371: if (($chome eq '') || ($chome eq 'no_host')) {
1372: return 'error: no such course';
1373: }
1374: my $cstring='';
1375: map {
1376: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1377: } keys %prefs;
1378: $cstring=~s/\&$//;
1379: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1380: }
1381:
1382: # ---------------------------------------------------------- Make/modify course
1383:
1384: sub createcourse {
1385: my ($udom,$description,$url)=@_;
1386: $url=&declutter($url);
1387: my $cid='';
1388: unless (&allowed('ccc',$ENV{'user.domain'})) {
1389: return 'refused';
1390: }
1391: unless ($udom eq $ENV{'user.domain'}) {
1392: return 'refused';
1393: }
1394: # ------------------------------------------------------------------- Create ID
1395: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1396: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1397: # ----------------------------------------------- Make sure that does not exist
1398: my $uhome=&homeserver($uname,$udom);
1399: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1400: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1401: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1402: $uhome=&homeserver($uname,$udom);
1403: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1404: return 'error: unable to generate unique course-ID';
1405: }
1406: }
1407: # ------------------------------------------------------------- Make the course
1408: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1409: $ENV{'user.home'});
1410: unless ($reply eq 'ok') { return 'error: '.$reply; }
1411: my $uhome=&homeserver($uname,$udom);
1412: if (($uhome eq '') || ($uhome eq 'no_host')) {
1413: return 'error: no such course';
1414: }
1415: &writecoursepref($udom.'_'.$uname,
1416: ('description' => $description,
1417: 'url' => $url));
1418: return '/'.$udom.'/'.$uname;
1419: }
1420:
1421: # ---------------------------------------------------------- Assign Custom Role
1422:
1423: sub assigncustomrole {
1424: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1425: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1426: $end,$start);
1427: }
1428:
1429: # ----------------------------------------------------------------- Revoke Role
1430:
1431: sub revokerole {
1432: my ($udom,$uname,$url,$role)=@_;
1433: my $now=time;
1434: return &assignrole($udom,$uname,$url,$role,$now);
1435: }
1436:
1437: # ---------------------------------------------------------- Revoke Custom Role
1438:
1439: sub revokecustomrole {
1440: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1441: my $now=time;
1442: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1443: }
1444:
1445: # ------------------------------------------------------------ Directory lister
1446:
1447: sub dirlist {
1448: my $uri=shift;
1449: $uri=~s/^\///;
1450: $uri=~s/\/$//;
1451: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1452: if ($udom) {
1453: if ($uname) {
1454: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1455: homeserver($uname,$udom));
1456: return split(/:/,$listing);
1457: } else {
1458: my $tryserver;
1459: my %allusers=();
1460: foreach $tryserver (keys %libserv) {
1461: if ($hostdom{$tryserver} eq $udom) {
1462: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1463: $tryserver);
1464: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1465: && ($listing ne 'con_lost')) {
1466: map {
1467: my ($entry,@stat)=split(/&/,$_);
1468: $allusers{$entry}=1;
1469: } split(/:/,$listing);
1470: }
1471: }
1472: }
1473: my $alluserstr='';
1474: map {
1475: $alluserstr.=$_.'&user:';
1476: } sort keys %allusers;
1477: $alluserstr=~s/:$//;
1478: return split(/:/,$alluserstr);
1479: }
1480: } else {
1481: my $tryserver;
1482: my %alldom=();
1483: foreach $tryserver (keys %libserv) {
1484: $alldom{$hostdom{$tryserver}}=1;
1485: }
1486: my $alldomstr='';
1487: map {
1488: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1489: } sort keys %alldom;
1490: $alldomstr=~s/:$//;
1491: return split(/:/,$alldomstr);
1492: }
1493: }
1494:
1495: # -------------------------------------------------------- Value of a Condition
1496:
1497: sub directcondval {
1498: my $number=shift;
1499: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1500: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1501: } else {
1502: return 2;
1503: }
1504: }
1505:
1506: sub condval {
1507: my $condidx=shift;
1508: my $result=0;
1509: my $allpathcond='';
1510: map {
1511: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
1512: $allpathcond.=
1513: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
1514: }
1515: } split(/\|/,$condidx);
1516: $allpathcond=~s/\|$//;
1517: if ($ENV{'request.course.id'}) {
1518: if ($allpathcond) {
1519: my $operand='|';
1520: my @stack;
1521: map {
1522: if ($_ eq '(') {
1523: push @stack,($operand,$result)
1524: } elsif ($_ eq ')') {
1525: my $before=pop @stack;
1526: if (pop @stack eq '&') {
1527: $result=$result>$before?$before:$result;
1528: } else {
1529: $result=$result>$before?$result:$before;
1530: }
1531: } elsif (($_ eq '&') || ($_ eq '|')) {
1532: $operand=$_;
1533: } else {
1534: my $new=directcondval($_);
1535: if ($operand eq '&') {
1536: $result=$result>$new?$new:$result;
1537: } else {
1538: $result=$result>$new?$result:$new;
1539: }
1540: }
1541: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
1542: }
1543: }
1544: return $result;
1545: }
1546:
1547: # --------------------------------------------------------- Value of a Variable
1548:
1549: sub EXT {
1550: my $varname=shift;
1551: unless ($varname) { return ''; }
1552: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
1553: my $rest;
1554: if ($therest[0]) {
1555: $rest=join('.',@therest);
1556: } else {
1557: $rest='';
1558: }
1559: my $qualifierrest=$qualifier;
1560: if ($rest) { $qualifierrest.='.'.$rest; }
1561: my $spacequalifierrest=$space;
1562: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1563: if ($realm eq 'user') {
1564: # --------------------------------------------------------------- user.resource
1565: if ($space eq 'resource') {
1566: my %restored=&restore;
1567: return $restored{$qualifierrest};
1568: # ----------------------------------------------------------------- user.access
1569: } elsif ($space eq 'access') {
1570: return &allowed($qualifier,$rest);
1571: # ------------------------------------------ user.preferences, user.environment
1572: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1573: return $ENV{join('.',('environment',$qualifierrest))};
1574: # ----------------------------------------------------------------- user.course
1575: } elsif ($space eq 'course') {
1576: return $ENV{join('.',('request.course',$qualifier))};
1577: # ------------------------------------------------------------------- user.role
1578: } elsif ($space eq 'role') {
1579: my ($role,$where)=split(/\./,$ENV{'request.role'});
1580: if ($qualifier eq 'value') {
1581: return $role;
1582: } elsif ($qualifier eq 'extent') {
1583: return $where;
1584: }
1585: # ----------------------------------------------------------------- user.domain
1586: } elsif ($space eq 'domain') {
1587: return $ENV{'user.domain'};
1588: # ------------------------------------------------------------------- user.name
1589: } elsif ($space eq 'name') {
1590: return $ENV{'user.name'};
1591: # ---------------------------------------------------- Any other user namespace
1592: } else {
1593: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
1594: my %reply=&get($space,$item);
1595: return $reply{$item};
1596: }
1597: } elsif ($realm eq 'request') {
1598: # ------------------------------------------------------------- request.browser
1599: if ($space eq 'browser') {
1600: return $ENV{'browser.'.$qualifier};
1601: # ------------------------------------------------------------ request.filename
1602: } else {
1603: return $ENV{'request.'.$spacequalifierrest};
1604: }
1605: } elsif ($realm eq 'course') {
1606: # ---------------------------------------------------------- course.description
1607: my $section='';
1608: if ($ENV{'request.course.sec'}) {
1609: $section='_'.$ENV{'request.course.sec'};
1610: }
1611: return $ENV{'course.'.$ENV{'request.course.id'}.$section.'.'.
1612: $spacequalifierrest};
1613: } elsif ($realm eq 'resource') {
1614: if ($ENV{'request.course.id'}) {
1615: # ----------------------------------------------------- Cascading lookup scheme
1616: my $symbp=&symbread();
1617: my $mapp=(split(/\_\_\_/,$symbp))[0];
1618:
1619: my $symbparm=$symbp.'.'.$spacequalifierrest;
1620: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
1621:
1622: my $seclevel=
1623: $ENV{'request.course.id'}.'.['.
1624: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
1625: my $seclevelr=
1626: $ENV{'request.course.id'}.'.['.
1627: $ENV{'request.course.sec'}.'].'.$symbparm;
1628: my $seclevelm=
1629: $ENV{'request.course.id'}.'.['.
1630: $ENV{'request.course.sec'}.'].'.$mapparm;
1631:
1632: my $courselevel=
1633: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
1634: my $courselevelr=
1635: $ENV{'request.course.id'}.'.'.$symbparm;
1636: my $courselevelm=
1637: $ENV{'request.course.id'}.'.'.$mapparm;
1638:
1639: # ----------------------------------------------------------- first, check user
1640: my %resourcedata=get('resourcedata',
1641: ($courselevelr,$courselevelm,$courselevel));
1642: if (($resourcedata{$courselevelr}!~/^error\:/) &&
1643: ($resourcedata{$courselevelr}!~/^con_lost/)) {
1644:
1645: if ($resourcedata{$courselevelr}) {
1646: return $resourcedata{$courselevelr}; }
1647: if ($resourcedata{$courselevelm}) {
1648: return $resourcedata{$courselevelm}; }
1649: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
1650:
1651: } else {
1652: if ($resourcedata{$courselevelr}!~/No such file/) {
1653: &logthis("<font color=blue>WARNING:".
1654: " Trying to get resource data for ".$ENV{'user.name'}." at "
1655: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
1656: "</font>");
1657: }
1658: }
1659:
1660: # -------------------------------------------------------- second, check course
1661:
1662: my $reply=&reply('get:'.
1663: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
1664: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1665: ':resourcedata:'.
1666: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
1667: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
1668: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
1669: if ($reply!~/^error\:/) {
1670: map {
1671: if ($_) { return &unescape($_); }
1672: } split(/\&/,$reply);
1673: }
1674: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
1675: &logthis("<font color=blue>WARNING:".
1676: " Getting ".$reply." asking for ".$varname." for ".
1677: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1678: ' at '.
1679: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
1680: ' from '.
1681: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
1682: "</font>");
1683: }
1684: # ------------------------------------------------------ third, check map parms
1685: my %parmhash=();
1686: my $thisparm='';
1687: if (tie(%parmhash,'GDBM_File',
1688: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
1689: $thisparm=$parmhash{$symbparm};
1690: untie(%parmhash);
1691: }
1692: if ($thisparm) { return $thisparm; }
1693: }
1694:
1695: # --------------------------------------------- last, look in resource metadata
1696:
1697: $spacequalifierrest=~s/\./\_/;
1698: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
1699: if ($metadata) { return $metadata; }
1700: $metadata=&metadata($ENV{'request.filename'},
1701: 'parameter_'.$spacequalifierrest);
1702: if ($metadata) { return $metadata; }
1703:
1704: # ---------------------------------------------------- Any other user namespace
1705: } elsif ($realm eq 'environment') {
1706: # ----------------------------------------------------------------- environment
1707: return $ENV{$spacequalifierrest};
1708: } elsif ($realm eq 'system') {
1709: # ----------------------------------------------------------------- system.time
1710: if ($space eq 'time') {
1711: return time;
1712: }
1713: }
1714: return '';
1715: }
1716:
1717: # ---------------------------------------------------------------- Get metadata
1718:
1719: sub metadata {
1720: my ($uri,$what)=@_;
1721:
1722: $uri=&declutter($uri);
1723: my $filename=$uri;
1724: $uri=~s/\.meta$//;
1725: unless ($metacache{$uri.':keys'}) {
1726: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
1727: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
1728: my $parser=HTML::TokeParser->new(\$metastring);
1729: my $token;
1730: while ($token=$parser->get_token) {
1731: if ($token->[0] eq 'S') {
1732: my $entry=$token->[1];
1733: my $unikey=$entry;
1734: if (defined($token->[2]->{'part'})) {
1735: $unikey.='_'.$token->[2]->{'part'};
1736: }
1737: if (defined($token->[2]->{'name'})) {
1738: $unikey.='_'.$token->[2]->{'name'};
1739: }
1740: if ($metacache{$uri.':keys'}) {
1741: $metacache{$uri.':keys'}.=','.$unikey;
1742: } else {
1743: $metacache{$uri.':keys'}=$unikey;
1744: }
1745: map {
1746: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
1747: } @{$token->[3]};
1748: unless (
1749: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
1750: ) { $metacache{$uri.':'.$unikey}=
1751: $metacache{$uri.':'.$unikey.'.default'};
1752: }
1753: }
1754: }
1755: }
1756: return $metacache{$uri.':'.$what};
1757: }
1758:
1759: # ------------------------------------------------- Update symbolic store links
1760:
1761: sub symblist {
1762: my ($mapname,%newhash)=@_;
1763: $mapname=declutter($mapname);
1764: my %hash;
1765: if (($ENV{'request.course.fn'}) && (%newhash)) {
1766: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1767: &GDBM_WRCREAT,0640)) {
1768: map {
1769: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
1770: } keys %newhash;
1771: if (untie(%hash)) {
1772: return 'ok';
1773: }
1774: }
1775: }
1776: return 'error';
1777: }
1778:
1779: # ------------------------------------------------------ Return symb list entry
1780:
1781: sub symbread {
1782: my $thisfn=shift;
1783: unless ($thisfn) {
1784: $thisfn=$ENV{'request.filename'};
1785: }
1786: $thisfn=declutter($thisfn);
1787: my %hash;
1788: my %bighash;
1789: my $syval='';
1790: if (($ENV{'request.course.fn'}) && ($thisfn)) {
1791: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1792: &GDBM_READER,0640)) {
1793: $syval=$hash{$thisfn};
1794: untie(%hash);
1795: }
1796: # ---------------------------------------------------------- There was an entry
1797: if ($syval) {
1798: unless ($syval=~/\_\d+$/) {
1799: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
1800: &appenv('request.ambiguous' => $thisfn);
1801: return '';
1802: }
1803: $syval.=$1;
1804: }
1805: } else {
1806: # ------------------------------------------------------- Was not in symb table
1807: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1808: &GDBM_READER,0640)) {
1809: # ---------------------------------------------- Get ID(s) for current resource
1810: my $ids=$bighash{'ids_/res/'.$thisfn};
1811: unless ($ids) {
1812: $ids=$bighash{'ids_/'.$thisfn};
1813: }
1814: if ($ids) {
1815: # ------------------------------------------------------------------- Has ID(s)
1816: my @possibilities=split(/\,/,$ids);
1817: if ($#possibilities==0) {
1818: # ----------------------------------------------- There is only one possibility
1819: my ($mapid,$resid)=split(/\./,$ids);
1820: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
1821: } else {
1822: # ------------------------------------------ There is more than one possibility
1823: my $realpossible=0;
1824: map {
1825: my $file=$bighash{'src_'.$_};
1826: if (&allowed('bre',$file)) {
1827: my ($mapid,$resid)=split(/\./,$_);
1828: if ($bighash{'map_type_'.$mapid} ne 'page') {
1829: $realpossible++;
1830: $syval=declutter($bighash{'map_id_'.$mapid}).
1831: '___'.$resid;
1832: }
1833: }
1834: } @possibilities;
1835: if ($realpossible!=1) { $syval=''; }
1836: }
1837: }
1838: untie(%bighash)
1839: }
1840: }
1841: if ($syval) {
1842: return $syval.'___'.$thisfn;
1843: }
1844: }
1845: &appenv('request.ambiguous' => $thisfn);
1846: return '';
1847: }
1848:
1849: # ---------------------------------------------------------- Return random seed
1850:
1851: sub numval {
1852: my $txt=shift;
1853: $txt=~tr/A-J/0-9/;
1854: $txt=~tr/a-j/0-9/;
1855: $txt=~tr/K-T/0-9/;
1856: $txt=~tr/k-t/0-9/;
1857: $txt=~tr/U-Z/0-5/;
1858: $txt=~tr/u-z/0-5/;
1859: $txt=~s/\D//g;
1860: return int($txt);
1861: }
1862:
1863: sub rndseed {
1864: my $symb;
1865: unless ($symb=&symbread()) { return time; }
1866: {
1867: use integer;
1868: my $symbchck=unpack("%32C*",$symb) << 27;
1869: my $symbseed=numval($symb) << 22;
1870: my $namechck=unpack("%32C*",$ENV{'user.name'}) << 17;
1871: my $nameseed=numval($ENV{'user.name'}) << 12;
1872: my $domainseed=unpack("%32C*",$ENV{'user.domain'}) << 7;
1873: my $courseseed=unpack("%32C*",$ENV{'request.course.id'});
1874: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
1875: #uncommenting these lines can break things!
1876: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
1877: #&Apache::lonxml::debug("rndseed :$num:$symb");
1878: return $num;
1879: }
1880: }
1881:
1882: sub ireceipt {
1883: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
1884: my $cuname=unpack("%32C*",$funame);
1885: my $cudom=unpack("%32C*",$fudom);
1886: my $cucourseid=unpack("%32C*",$fucourseid);
1887: my $cusymb=unpack("%32C*",$fusymb);
1888: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
1889: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
1890: ($cunique%$cuname+
1891: $cunique%$cudom+
1892: $cusymb%$cuname+
1893: $cusymb%$cudom+
1894: $cucourseid%$cuname+
1895: $cucourseid%$cudom);
1896: }
1897:
1898: sub receipt {
1899: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
1900: $ENV{'request.course.id'},&symbread());
1901: }
1902:
1903: # ------------------------------------------------------------ Serves up a file
1904: # returns either the contents of the file or a -1
1905: sub getfile {
1906: my $file=shift;
1907: &repcopy($file);
1908: if (! -e $file ) { return -1; };
1909: my $fh=Apache::File->new($file);
1910: my $a='';
1911: while (<$fh>) { $a .=$_; }
1912: return $a
1913: }
1914:
1915: sub filelocation {
1916: my ($dir,$file) = @_;
1917: my $location;
1918: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
1919: if ($file=~m:^/~:) { # is a contruction space reference
1920: $location = $file;
1921: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
1922: } else {
1923: $file=~s/^$perlvar{'lonDocRoot'}//;
1924: $file=~s:^/*res::;
1925: if ( !( $file =~ m:^/:) ) {
1926: $location = $dir. '/'.$file;
1927: } else {
1928: $location = '/home/httpd/html/res'.$file;
1929: }
1930: }
1931: $location=~s://+:/:g; # remove duplicate /
1932: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
1933: return $location;
1934: }
1935:
1936: sub hreflocation {
1937: my ($dir,$file)=@_;
1938: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
1939: my $finalpath=filelocation($dir,$file);
1940: $finalpath=~s/^\/home\/httpd\/html//;
1941: return $finalpath;
1942: } else {
1943: return $file;
1944: }
1945: }
1946:
1947: # ------------------------------------------------------------- Declutters URLs
1948:
1949: sub declutter {
1950: my $thisfn=shift;
1951: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
1952: $thisfn=~s/^\///;
1953: $thisfn=~s/^res\///;
1954: return $thisfn;
1955: }
1956:
1957: # -------------------------------------------------------- Escape Special Chars
1958:
1959: sub escape {
1960: my $str=shift;
1961: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
1962: return $str;
1963: }
1964:
1965: # ----------------------------------------------------- Un-Escape Special Chars
1966:
1967: sub unescape {
1968: my $str=shift;
1969: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1970: return $str;
1971: }
1972:
1973: # ================================================================ Main Program
1974:
1975: sub BEGIN {
1976: if ($readit ne 'done') {
1977: # ------------------------------------------------------------ Read access.conf
1978: {
1979: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
1980:
1981: while (my $configline=<$config>) {
1982: if ($configline =~ /PerlSetVar/) {
1983: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
1984: chomp($varvalue);
1985: $perlvar{$varname}=$varvalue;
1986: }
1987: }
1988: }
1989:
1990: # ------------------------------------------------------------- Read hosts file
1991: {
1992: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
1993:
1994: while (my $configline=<$config>) {
1995: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
1996: $hostname{$id}=$name;
1997: $hostdom{$id}=$domain;
1998: if ($role eq 'library') { $libserv{$id}=$name; }
1999: }
2000: }
2001:
2002: # ------------------------------------------------------ Read spare server file
2003: {
2004: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2005:
2006: while (my $configline=<$config>) {
2007: chomp($configline);
2008: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2009: $spareid{$configline}=1;
2010: }
2011: }
2012: }
2013: # ------------------------------------------------------------ Read permissions
2014: {
2015: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2016:
2017: while (my $configline=<$config>) {
2018: chomp($configline);
2019: my ($role,$perm)=split(/ /,$configline);
2020: if ($perm ne '') { $pr{$role}=$perm; }
2021: }
2022: }
2023:
2024: # -------------------------------------------- Read plain texts for permissions
2025: {
2026: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2027:
2028: while (my $configline=<$config>) {
2029: chomp($configline);
2030: my ($short,$plain)=split(/:/,$configline);
2031: if ($plain ne '') { $prp{$short}=$plain; }
2032: }
2033: }
2034:
2035: # ------------------------------------------------------------- Read file types
2036: {
2037: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2038:
2039: while (my $configline=<$config>) {
2040: chomp($configline);
2041: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2042: if ($descr[0] ne '') {
2043: $fe{$ending}=$emb;
2044: $fd{$ending}=join(' ',@descr);
2045: }
2046: }
2047: }
2048:
2049: %metacache=();
2050:
2051: $readit='done';
2052: &logthis('<font color=yellow>INFO: Read configuration</font>');
2053: }
2054: }
2055: 1;
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