1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # Functions for use by content handlers:
5: #
6: # metadata_query(sql-query-string) : returns file handle of where sql
7: # results will be stored for query
8: # plaintext(short) : plain text explanation of short term
9: # fileembstyle(ext) : embed style in page for file extension
10: # filedescription(ext) : descriptor text for file extension
11: # allowed(short,url) : returns codes for allowed actions
12: # F: full access
13: # U,I,K: authentication modes (cxx only)
14: # '': forbidden
15: # 1: user needs to choose course
16: # 2: browse allowed
17: # definerole(rolename,sys,dom,cou) : define a custom role rolename
18: # set privileges in format of lonTabs/roles.tab for
19: # system, domain and course level,
20: # assignrole(udom,uname,url,role,end,start) : give a role to a user for the
21: # level given by url. Optional start and end dates
22: # (leave empty string or zero for "no date")
23: # assigncustomrole (udom,uname,url,rdom,rnam,rolename,end,start) : give a
24: # custom role to a user for the level given by url.
25: # Specify name and domain of role author, and role name
26: # revokerole (udom,uname,url,role) : Revoke a role for url
27: # revokecustomrole (udom,uname,url,rdom,rnam,rolename) : Revoke a custom role
28: # appenv(hash) : adds hash to session environment
29: # delenv(varname) : deletes all environment entries starting with varname
30: # store(hash) : stores hash permanently for this url
31: # cstore(hash) : critical store
32: # restore : returns hash for this url
33: # eget(namesp,array) : returns hash with keys from array filled in from namesp
34: # get(namesp,array) : returns hash with keys from array filled in from namesp
35: # del(namesp,array) : deletes keys out of array from namesp
36: # put(namesp,hash) : stores hash in namesp
37: # cput(namesp,hash) : critical put
38: # dump(namesp) : dumps the complete namespace into a hash
39: # ssi(url,hash) : does a complete request cycle on url to localhost, posts
40: # hash
41: # coursedescription(id) : returns and caches course description for id
42: # repcopy(filename) : replicate file
43: # dirlist(url) : gets a directory listing
44: # directcondval(index) : reading condition value of single condition from
45: # state string
46: # condval(index) : value of condition index based on state
47: # EXT(name) : value of a variable
48: # symblist(map,hash) : Updates symbolic storage links
49: # symbread([filename]) : returns the data handle (filename optional)
50: # rndseed() : returns a random seed
51: # receipt() : returns a receipt to be given out to users
52: # getfile(filename) : returns the contents of filename, or a -1 if it can't
53: # be found, replicates and subscribes to the file
54: # filelocation(dir,file) : returns a farily clean absolute reference to file
55: # from the directory dir
56: # hreflocation(dir,file) : same as filelocation, but for hrefs
57: # log(domain,user,home,msg) : write to permanent log for user
58: # usection(domain,user,courseid) : output of section name/number or '' for
59: # "not in course" and '-1' for "no section"
60: # userenvironment(domain,user,what) : puts out any environment parameter
61: # for a user
62: # idput(domain,hash) : writes IDs for users from hash (name=>id,name=>id)
63: # idget(domain,array): returns hash with usernames (id=>name,id=>name) for
64: # an array of IDs
65: # idrget(domain,array): returns hash with IDs for usernames (name=>id,...) for
66: # an array of names
67: # metadata(file,entry): returns the metadata entry for a file. entry='keys'
68: # returns a comma separated list of keys
69: #
70: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
71: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
72: # 11/8,11/16,11/18,11/22,11/23,12/22,
73: # 01/06,01/13,02/24,02/28,02/29,
74: # 03/01,03/02,03/06,03/07,03/13,
75: # 04/05,05/29,05/31,06/01,
76: # 06/05,06/26 Gerd Kortemeyer
77: # 06/26 Ben Tyszka
78: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
79: # 08/14 Ben Tyszka
80: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
81: # 10/04 Gerd Kortemeyer
82: # 10/04 Guy Albertelli
83: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
84: # 10/30,10/31,
85: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
86: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
87: # 05/01/01 Guy Albertelli
88: # 05/01,06/01,09/01 Gerd Kortemeyer
89: # 09/01 Guy Albertelli
90: # 09/01,10/01,11/01 Gerd Kortemeyer
91: # 02/27/01 Scott Harrison
92: # 3/2 Gerd Kortemeyer
93: # 3/15 Scott Harrison
94: # 3/19 Gerd Kortemeyer
95:
96: package Apache::lonnet;
97:
98: use strict;
99: use Apache::File;
100: use LWP::UserAgent();
101: use HTTP::Headers;
102: use vars
103: qw(%perlvar %hostname %homecache %spareid %hostdom %libserv %pr %prp %fe %fd $readit %metacache);
104: use IO::Socket;
105: use GDBM_File;
106: use Apache::Constants qw(:common :http);
107: use HTML::TokeParser;
108: use Fcntl qw(:flock);
109:
110: # --------------------------------------------------------------------- Logging
111:
112: sub logthis {
113: my $message=shift;
114: my $execdir=$perlvar{'lonDaemons'};
115: my $now=time;
116: my $local=localtime($now);
117: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
118: print $fh "$local ($$): $message\n";
119: return 1;
120: }
121:
122: sub logperm {
123: my $message=shift;
124: my $execdir=$perlvar{'lonDaemons'};
125: my $now=time;
126: my $local=localtime($now);
127: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
128: print $fh "$now:$message:$local\n";
129: return 1;
130: }
131:
132: # -------------------------------------------------- Non-critical communication
133: sub subreply {
134: my ($cmd,$server)=@_;
135: my $peerfile="$perlvar{'lonSockDir'}/$server";
136: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
137: Type => SOCK_STREAM,
138: Timeout => 10)
139: or return "con_lost";
140: print $client "$cmd\n";
141: my $answer=<$client>;
142: if (!$answer) { $answer="con_lost"; }
143: chomp($answer);
144: return $answer;
145: }
146:
147: sub reply {
148: my ($cmd,$server)=@_;
149: my $answer=subreply($cmd,$server);
150: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
151: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
152: &logthis("<font color=blue>WARNING:".
153: " $cmd to $server returned $answer</font>");
154: }
155: return $answer;
156: }
157:
158: # ----------------------------------------------------------- Send USR1 to lonc
159:
160: sub reconlonc {
161: my $peerfile=shift;
162: &logthis("Trying to reconnect for $peerfile");
163: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
164: if (my $fh=Apache::File->new("$loncfile")) {
165: my $loncpid=<$fh>;
166: chomp($loncpid);
167: if (kill 0 => $loncpid) {
168: &logthis("lonc at pid $loncpid responding, sending USR1");
169: kill USR1 => $loncpid;
170: sleep 1;
171: if (-e "$peerfile") { return; }
172: &logthis("$peerfile still not there, give it another try");
173: sleep 5;
174: if (-e "$peerfile") { return; }
175: &logthis(
176: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
177: } else {
178: &logthis(
179: "<font color=blue>WARNING:".
180: " lonc at pid $loncpid not responding, giving up</font>");
181: }
182: } else {
183: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
184: }
185: }
186:
187: # ------------------------------------------------------ Critical communication
188:
189: sub critical {
190: my ($cmd,$server)=@_;
191: unless ($hostname{$server}) {
192: &logthis("<font color=blue>WARNING:".
193: " Critical message to unknown server ($server)</font>");
194: return 'no_such_host';
195: }
196: my $answer=reply($cmd,$server);
197: if ($answer eq 'con_lost') {
198: my $pingreply=reply('ping',$server);
199: &reconlonc("$perlvar{'lonSockDir'}/$server");
200: my $pongreply=reply('pong',$server);
201: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
202: $answer=reply($cmd,$server);
203: if ($answer eq 'con_lost') {
204: my $now=time;
205: my $middlename=$cmd;
206: $middlename=substr($middlename,0,16);
207: $middlename=~s/\W//g;
208: my $dfilename=
209: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
210: {
211: my $dfh;
212: if ($dfh=Apache::File->new(">$dfilename")) {
213: print $dfh "$cmd\n";
214: }
215: }
216: sleep 2;
217: my $wcmd='';
218: {
219: my $dfh;
220: if ($dfh=Apache::File->new("$dfilename")) {
221: $wcmd=<$dfh>;
222: }
223: }
224: chomp($wcmd);
225: if ($wcmd eq $cmd) {
226: &logthis("<font color=blue>WARNING: ".
227: "Connection buffer $dfilename: $cmd</font>");
228: &logperm("D:$server:$cmd");
229: return 'con_delayed';
230: } else {
231: &logthis("<font color=red>CRITICAL:"
232: ." Critical connection failed: $server $cmd</font>");
233: &logperm("F:$server:$cmd");
234: return 'con_failed';
235: }
236: }
237: }
238: return $answer;
239: }
240:
241: # ---------------------------------------------------------- Append Environment
242:
243: sub appenv {
244: my %newenv=@_;
245: map {
246: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
247: &logthis("<font color=blue>WARNING: ".
248: "Attempt to modify environment ".$_." to ".$newenv{$_});
249: delete($newenv{$_});
250: } else {
251: $ENV{$_}=$newenv{$_};
252: }
253: } keys %newenv;
254:
255: my $lockfh;
256: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
257: return 'error: '.$!;
258: }
259: unless (flock($lockfh,LOCK_EX)) {
260: &logthis("<font color=blue>WARNING: ".
261: 'Could not obtain exclusive lock in appenv: '.$!);
262: $lockfh->close();
263: return 'error: '.$!;
264: }
265:
266: my @oldenv;
267: {
268: my $fh;
269: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
270: return 'error: '.$!;
271: }
272: @oldenv=<$fh>;
273: $fh->close();
274: }
275: for (my $i=0; $i<=$#oldenv; $i++) {
276: chomp($oldenv[$i]);
277: if ($oldenv[$i] ne '') {
278: my ($name,$value)=split(/=/,$oldenv[$i]);
279: unless (defined($newenv{$name})) {
280: $newenv{$name}=$value;
281: }
282: }
283: }
284: {
285: my $fh;
286: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
287: return 'error';
288: }
289: my $newname;
290: foreach $newname (keys %newenv) {
291: print $fh "$newname=$newenv{$newname}\n";
292: }
293: $fh->close();
294: }
295:
296: $lockfh->close();
297: return 'ok';
298: }
299: # ----------------------------------------------------- Delete from Environment
300:
301: sub delenv {
302: my $delthis=shift;
303: my %newenv=();
304: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
305: &logthis("<font color=blue>WARNING: ".
306: "Attempt to delete from environment ".$delthis);
307: return 'error';
308: }
309: my @oldenv;
310: {
311: my $fh;
312: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
313: return 'error';
314: }
315: unless (flock($fh,LOCK_SH)) {
316: &logthis("<font color=blue>WARNING: ".
317: 'Could not obtain shared lock in delenv: '.$!);
318: $fh->close();
319: return 'error: '.$!;
320: }
321: @oldenv=<$fh>;
322: $fh->close();
323: }
324: {
325: my $fh;
326: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
327: return 'error';
328: }
329: unless (flock($fh,LOCK_EX)) {
330: &logthis("<font color=blue>WARNING: ".
331: 'Could not obtain exclusive lock in delenv: '.$!);
332: $fh->close();
333: return 'error: '.$!;
334: }
335: map {
336: unless ($_=~/^$delthis/) { print $fh $_; }
337: } @oldenv;
338: $fh->close();
339: }
340: return 'ok';
341: }
342:
343: # ------------------------------ Find server with least workload from spare.tab
344:
345: sub spareserver {
346: my $tryserver;
347: my $spareserver='';
348: my $lowestserver=100;
349: foreach $tryserver (keys %spareid) {
350: my $answer=reply('load',$tryserver);
351: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
352: $spareserver="http://$hostname{$tryserver}";
353: $lowestserver=$answer;
354: }
355: }
356: return $spareserver;
357: }
358:
359: # --------- Try to authenticate user from domain's lib servers (first this one)
360:
361: sub authenticate {
362: my ($uname,$upass,$udom)=@_;
363: $upass=escape($upass);
364: if (($perlvar{'lonRole'} eq 'library') &&
365: ($udom eq $perlvar{'lonDefDomain'})) {
366: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
367: if ($answer =~ /authorized/) {
368: if ($answer eq 'authorized') {
369: &logthis("User $uname at $udom authorized by local server");
370: return $perlvar{'lonHostID'};
371: }
372: if ($answer eq 'non_authorized') {
373: &logthis("User $uname at $udom rejected by local server");
374: return 'no_host';
375: }
376: }
377: }
378:
379: my $tryserver;
380: foreach $tryserver (keys %libserv) {
381: if ($hostdom{$tryserver} eq $udom) {
382: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
383: if ($answer =~ /authorized/) {
384: if ($answer eq 'authorized') {
385: &logthis("User $uname at $udom authorized by $tryserver");
386: return $tryserver;
387: }
388: if ($answer eq 'non_authorized') {
389: &logthis("User $uname at $udom rejected by $tryserver");
390: return 'no_host';
391: }
392: }
393: }
394: }
395: &logthis("User $uname at $udom could not be authenticated");
396: return 'no_host';
397: }
398:
399: # ---------------------- Find the homebase for a user from domain's lib servers
400:
401: sub homeserver {
402: my ($uname,$udom)=@_;
403:
404: my $index="$uname:$udom";
405: if ($homecache{$index}) { return "$homecache{$index}"; }
406:
407: my $tryserver;
408: foreach $tryserver (keys %libserv) {
409: if ($hostdom{$tryserver} eq $udom) {
410: my $answer=reply("home:$udom:$uname",$tryserver);
411: if ($answer eq 'found') {
412: $homecache{$index}=$tryserver;
413: return $tryserver;
414: }
415: }
416: }
417: return 'no_host';
418: }
419:
420: # ------------------------------------- Find the usernames behind a list of IDs
421:
422: sub idget {
423: my ($udom,@ids)=@_;
424: my %returnhash=();
425:
426: my $tryserver;
427: foreach $tryserver (keys %libserv) {
428: if ($hostdom{$tryserver} eq $udom) {
429: my $idlist=join('&',@ids);
430: $idlist=~tr/A-Z/a-z/;
431: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
432: my @answer=();
433: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
434: @answer=split(/\&/,$reply);
435: } ;
436: my $i;
437: for ($i=0;$i<=$#ids;$i++) {
438: if ($answer[$i]) {
439: $returnhash{$ids[$i]}=$answer[$i];
440: }
441: }
442: }
443: }
444: return %returnhash;
445: }
446:
447: # ------------------------------------- Find the IDs behind a list of usernames
448:
449: sub idrget {
450: my ($udom,@unames)=@_;
451: my %returnhash=();
452: map {
453: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
454: } @unames;
455: return %returnhash;
456: }
457:
458: # ------------------------------- Store away a list of names and associated IDs
459:
460: sub idput {
461: my ($udom,%ids)=@_;
462: my %servers=();
463: map {
464: my $uhom=&homeserver($_,$udom);
465: if ($uhom ne 'no_host') {
466: my $id=&escape($ids{$_});
467: $id=~tr/A-Z/a-z/;
468: my $unam=&escape($_);
469: if ($servers{$uhom}) {
470: $servers{$uhom}.='&'.$id.'='.$unam;
471: } else {
472: $servers{$uhom}=$id.'='.$unam;
473: }
474: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
475: }
476: } keys %ids;
477: map {
478: &critical('idput:'.$udom.':'.$servers{$_},$_);
479: } keys %servers;
480: }
481:
482: # ------------------------------------- Find the section of student in a course
483:
484: sub usection {
485: my ($udom,$unam,$courseid)=@_;
486: $courseid=~s/\_/\//g;
487: $courseid=~s/^(\w)/\/$1/;
488: map {
489: my ($key,$value)=split(/\=/,$_);
490: $key=&unescape($key);
491: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
492: my $section=$1;
493: if ($key eq $courseid.'_st') { $section=''; }
494: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
495: my $now=time;
496: my $notactive=0;
497: if ($start) {
498: if ($now<$start) { $notactive=1; }
499: }
500: if ($end) {
501: if ($now>$end) { $notactive=1; }
502: }
503: unless ($notactive) { return $section; }
504: }
505: } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
506: &homeserver($unam,$udom)));
507: return '-1';
508: }
509:
510: # ------------------------------------- Read an entry from a user's environment
511:
512: sub userenvironment {
513: my ($udom,$unam,@what)=@_;
514: my %returnhash=();
515: my @answer=split(/\&/,
516: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
517: &homeserver($unam,$udom)));
518: my $i;
519: for ($i=0;$i<=$#what;$i++) {
520: $returnhash{$what[$i]}=&unescape($answer[$i]);
521: }
522: return %returnhash;
523: }
524:
525: # ----------------------------- Subscribe to a resource, return URL if possible
526:
527: sub subscribe {
528: my $fname=shift;
529: my $author=$fname;
530: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
531: my ($udom,$uname)=split(/\//,$author);
532: my $home=homeserver($uname,$udom);
533: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
534: return 'not_found';
535: }
536: my $answer=reply("sub:$fname",$home);
537: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
538: $answer.=' by '.$home;
539: }
540: return $answer;
541: }
542:
543: # -------------------------------------------------------------- Replicate file
544:
545: sub repcopy {
546: my $filename=shift;
547: $filename=~s/\/+/\//g;
548: my $transname="$filename.in.transfer";
549: if ((-e $filename) || (-e $transname)) { return OK; }
550: my $remoteurl=subscribe($filename);
551: if ($remoteurl =~ /^con_lost by/) {
552: &logthis("Subscribe returned $remoteurl: $filename");
553: return HTTP_SERVICE_UNAVAILABLE;
554: } elsif ($remoteurl eq 'not_found') {
555: &logthis("Subscribe returned not_found: $filename");
556: return HTTP_NOT_FOUND;
557: } elsif ($remoteurl =~ /^rejected by/) {
558: &logthis("Subscribe returned $remoteurl: $filename");
559: return FORBIDDEN;
560: } elsif ($remoteurl eq 'directory') {
561: return OK;
562: } else {
563: my @parts=split(/\//,$filename);
564: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
565: if ($path ne "$perlvar{'lonDocRoot'}/res") {
566: &logthis("Malconfiguration for replication: $filename");
567: return HTTP_BAD_REQUEST;
568: }
569: my $count;
570: for ($count=5;$count<$#parts;$count++) {
571: $path.="/$parts[$count]";
572: if ((-e $path)!=1) {
573: mkdir($path,0777);
574: }
575: }
576: my $ua=new LWP::UserAgent;
577: my $request=new HTTP::Request('GET',"$remoteurl");
578: my $response=$ua->request($request,$transname);
579: if ($response->is_error()) {
580: unlink($transname);
581: my $message=$response->status_line;
582: &logthis("<font color=blue>WARNING:"
583: ." LWP get: $message: $filename</font>");
584: return HTTP_SERVICE_UNAVAILABLE;
585: } else {
586: if ($remoteurl!~/\.meta$/) {
587: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
588: my $mresponse=$ua->request($mrequest,$filename.'.meta');
589: if ($mresponse->is_error()) {
590: unlink($filename.'.meta');
591: &logthis(
592: "<font color=yellow>INFO: No metadata: $filename</font>");
593: }
594: }
595: rename($transname,$filename);
596: return OK;
597: }
598: }
599: }
600:
601: # --------------------------------------------------------- Server Side Include
602:
603: sub ssi {
604:
605: my ($fn,%form)=@_;
606:
607: my $ua=new LWP::UserAgent;
608:
609: my $request;
610:
611: if (%form) {
612: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
613: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
614: } else {
615: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
616: }
617:
618: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
619: my $response=$ua->request($request);
620:
621: return $response->content;
622: }
623:
624: # ------------------------------------------------------------------------- Log
625:
626: sub log {
627: my ($dom,$nam,$hom,$what)=@_;
628: return critical("log:$dom:$nam:$what",$hom);
629: }
630:
631: # ----------------------------------------------------- Devalidate Spreadsheets
632:
633: sub devalidate {
634: my $symb=shift;
635: my $cid=$ENV{'request.course.id'};
636: if ($cid) {
637: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
638: my $status=
639: &reply('del:'.$ENV{'course.'.$cid.'.domain'}.':'.
640: $ENV{'course.'.$cid.'.num'}.
641: ':nohist_calculatedsheets:'.
642: &escape($key.'studentcalc:'),
643: $ENV{'course.'.$cid.'.home'})
644: .' '.
645: &reply('del:'.$ENV{'user.domain'}.':'.
646: $ENV{'user.name'}.
647: ':nohist_calculatedsheets_'.$cid.':'.
648: &escape($key.'assesscalc:'.$symb),
649: $ENV{'user.home'});
650: unless ($status eq 'ok ok') {
651: &logthis('Could not devalidate spreadsheet '.
652: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
653: $symb.': '.$status);
654: }
655: }
656: }
657:
658: # ----------------------------------------------------------------------- Store
659:
660: sub store {
661: my %storehash=@_;
662: my $symb;
663: unless ($symb=&symbread()) { return ''; }
664:
665: &devalidate($symb);
666:
667: $symb=escape($symb);
668: my $namespace;
669: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
670: my $namevalue='';
671: map {
672: $namevalue.=escape($_).'='.escape($storehash{$_}).'&';
673: } keys %storehash;
674: $namevalue=~s/\&$//;
675: return reply(
676: "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
677: "$ENV{'user.home'}");
678: }
679:
680: # -------------------------------------------------------------- Critical Store
681:
682: sub cstore {
683: my %storehash=@_;
684: my $symb;
685: unless ($symb=&symbread()) { return ''; }
686:
687: &devalidate($symb);
688:
689: $symb=escape($symb);
690: my $namespace;
691: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
692: my $namevalue='';
693: map {
694: $namevalue.=escape($_).'='.escape($storehash{$_}).'&';
695: } keys %storehash;
696: $namevalue=~s/\&$//;
697: return critical(
698: "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
699: "$ENV{'user.home'}");
700: }
701:
702: # --------------------------------------------------------------------- Restore
703:
704: sub restore {
705: my $symb;
706: unless ($symb=escape(&symbread())) { return ''; }
707: my $namespace;
708: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
709: my $answer=reply(
710: "restore:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb",
711: "$ENV{'user.home'}");
712: my %returnhash=();
713: map {
714: my ($name,$value)=split(/\=/,$_);
715: $returnhash{&unescape($name)}=&unescape($value);
716: } split(/\&/,$answer);
717: my $version;
718: for ($version=1;$version<=$returnhash{'version'};$version++) {
719: map {
720: $returnhash{$_}=$returnhash{$version.':'.$_};
721: } split(/\:/,$returnhash{$version.':keys'});
722: }
723: return %returnhash;
724: }
725:
726: # ---------------------------------------------------------- Course Description
727:
728: sub coursedescription {
729: my $courseid=shift;
730: $courseid=~s/^\///;
731: $courseid=~s/\_/\//g;
732: my ($cdomain,$cnum)=split(/\//,$courseid);
733: my $chome=homeserver($cnum,$cdomain);
734: if ($chome ne 'no_host') {
735: my $rep=reply("dump:$cdomain:$cnum:environment",$chome);
736: if ($rep ne 'con_lost') {
737: my $normalid=$cdomain.'_'.$cnum;
738: my %envhash=();
739: my %returnhash=('home' => $chome,
740: 'domain' => $cdomain,
741: 'num' => $cnum);
742: map {
743: my ($name,$value)=split(/\=/,$_);
744: $name=&unescape($name);
745: $value=&unescape($value);
746: $returnhash{$name}=$value;
747: $envhash{'course.'.$normalid.'.'.$name}=$value;
748: } split(/\&/,$rep);
749: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
750: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
751: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
752: $envhash{'course.'.$normalid.'.last_cache'}=time;
753: $envhash{'course.'.$normalid.'.home'}=$chome;
754: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
755: $envhash{'course.'.$normalid.'.num'}=$cnum;
756: &appenv(%envhash);
757: return %returnhash;
758: }
759: }
760: return ();
761: }
762:
763: # -------------------------------------------------------- Get user privileges
764:
765: sub rolesinit {
766: my ($domain,$username,$authhost)=@_;
767: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
768: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
769: my %allroles=();
770: my %thesepriv=();
771: my $now=time;
772: my $userroles="user.login.time=$now\n";
773: my $thesestr;
774:
775: if ($rolesdump ne '') {
776: map {
777: if ($_!~/^rolesdef\&/) {
778: my ($area,$role)=split(/=/,$_);
779: $area=~s/\_\w\w$//;
780: my ($trole,$tend,$tstart)=split(/_/,$role);
781: $userroles.='user.role.'.$trole.'.'.$area.'='.
782: $tstart.'.'.$tend."\n";
783: if ($tend!=0) {
784: if ($tend<$now) {
785: $trole='';
786: }
787: }
788: if ($tstart!=0) {
789: if ($tstart>$now) {
790: $trole='';
791: }
792: }
793: if (($area ne '') && ($trole ne '')) {
794: my $spec=$trole.'.'.$area;
795: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
796: if ($trole =~ /^cr\//) {
797: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
798: my $homsvr=homeserver($rauthor,$rdomain);
799: if ($hostname{$homsvr} ne '') {
800: my $roledef=
801: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
802: $homsvr);
803: if (($roledef ne 'con_lost') && ($roledef ne '')) {
804: my ($syspriv,$dompriv,$coursepriv)=
805: split(/\_/,unescape($roledef));
806: $allroles{'cm./'}.=':'.$syspriv;
807: $allroles{$spec.'./'}.=':'.$syspriv;
808: if ($tdomain ne '') {
809: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
810: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
811: if ($trest ne '') {
812: $allroles{'cm.'.$area}.=':'.$coursepriv;
813: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
814: }
815: }
816: }
817: }
818: } else {
819: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
820: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
821: if ($tdomain ne '') {
822: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
823: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
824: if ($trest ne '') {
825: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
826: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
827: }
828: }
829: }
830: }
831: }
832: } split(/&/,$rolesdump);
833: map {
834: %thesepriv=();
835: map {
836: if ($_ ne '') {
837: my ($privilege,$restrictions)=split(/&/,$_);
838: if ($restrictions eq '') {
839: $thesepriv{$privilege}='F';
840: } else {
841: if ($thesepriv{$privilege} ne 'F') {
842: $thesepriv{$privilege}.=$restrictions;
843: }
844: }
845: }
846: } split(/:/,$allroles{$_});
847: $thesestr='';
848: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
849: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
850: } keys %allroles;
851: }
852: return $userroles;
853: }
854:
855: # --------------------------------------------------------------- get interface
856:
857: sub get {
858: my ($namespace,@storearr)=@_;
859: my $items='';
860: map {
861: $items.=escape($_).'&';
862: } @storearr;
863: $items=~s/\&$//;
864: my $rep=reply("get:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
865: $ENV{'user.home'});
866: my @pairs=split(/\&/,$rep);
867: my %returnhash=();
868: my $i=0;
869: map {
870: $returnhash{$_}=unescape($pairs[$i]);
871: $i++;
872: } @storearr;
873: return %returnhash;
874: }
875:
876: # --------------------------------------------------------------- del interface
877:
878: sub del {
879: my ($namespace,@storearr)=@_;
880: my $items='';
881: map {
882: $items.=escape($_).'&';
883: } @storearr;
884: $items=~s/\&$//;
885: return reply("del:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
886: $ENV{'user.home'});
887: }
888:
889: # -------------------------------------------------------------- dump interface
890:
891: sub dump {
892: my $namespace=shift;
893: my $rep=reply("dump:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace",
894: $ENV{'user.home'});
895: my @pairs=split(/\&/,$rep);
896: my %returnhash=();
897: map {
898: my ($key,$value)=split(/=/,$_);
899: $returnhash{unescape($key)}=unescape($value);
900: } @pairs;
901: return %returnhash;
902: }
903:
904: # --------------------------------------------------------------- put interface
905:
906: sub put {
907: my ($namespace,%storehash)=@_;
908: my $items='';
909: map {
910: $items.=escape($_).'='.escape($storehash{$_}).'&';
911: } keys %storehash;
912: $items=~s/\&$//;
913: return reply("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
914: $ENV{'user.home'});
915: }
916:
917: # ------------------------------------------------------ critical put interface
918:
919: sub cput {
920: my ($namespace,%storehash)=@_;
921: my $items='';
922: map {
923: $items.=escape($_).'='.escape($storehash{$_}).'&';
924: } keys %storehash;
925: $items=~s/\&$//;
926: return critical
927: ("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
928: $ENV{'user.home'});
929: }
930:
931: # -------------------------------------------------------------- eget interface
932:
933: sub eget {
934: my ($namespace,@storearr)=@_;
935: my $items='';
936: map {
937: $items.=escape($_).'&';
938: } @storearr;
939: $items=~s/\&$//;
940: my $rep=reply("eget:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
941: $ENV{'user.home'});
942: my @pairs=split(/\&/,$rep);
943: my %returnhash=();
944: my $i=0;
945: map {
946: $returnhash{$_}=unescape($pairs[$i]);
947: $i++;
948: } @storearr;
949: return %returnhash;
950: }
951:
952: # ------------------------------------------------- Check for a user privilege
953:
954: sub allowed {
955: my ($priv,$uri)=@_;
956: $uri=&declutter($uri);
957:
958: # Free bre access to adm and meta resources
959:
960: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
961: return 'F';
962: }
963:
964: my $thisallowed='';
965: my $statecond=0;
966: my $courseprivid='';
967:
968: # Course
969:
970: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
971: $thisallowed.=$1;
972: }
973:
974: # Domain
975:
976: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
977: =~/$priv\&([^\:]*)/) {
978: $thisallowed.=$1;
979: }
980:
981: # Course: uri itself is a course
982: my $courseuri=$uri;
983: $courseuri=~s/\_(\d)/\/$1/;
984: $courseuri=~s/^([^\/])/\/$1/;
985:
986: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
987: =~/$priv\&([^\:]*)/) {
988: $thisallowed.=$1;
989: }
990:
991: # Full access at system, domain or course-wide level? Exit.
992:
993: if ($thisallowed=~/F/) {
994: return 'F';
995: }
996:
997: # If this is generating or modifying users, exit with special codes
998:
999: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:'=~/\:$priv\:/) {
1000: return $thisallowed;
1001: }
1002: #
1003: # Gathered so far: system, domain and course wide privileges
1004: #
1005: # Course: See if uri or referer is an individual resource that is part of
1006: # the course
1007:
1008: if ($ENV{'request.course.id'}) {
1009: $courseprivid=$ENV{'request.course.id'};
1010: if ($ENV{'request.course.sec'}) {
1011: $courseprivid.='/'.$ENV{'request.course.sec'};
1012: }
1013: $courseprivid=~s/\_/\//;
1014: my $checkreferer=1;
1015: my @uriparts=split(/\//,$uri);
1016: my $filename=$uriparts[$#uriparts];
1017: my $pathname=$uri;
1018: $pathname=~s/\/$filename$//;
1019: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1020: /\&$filename\:([\d\|]+)\&/) {
1021: $statecond=$1;
1022: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1023: =~/$priv\&([^\:]*)/) {
1024: $thisallowed.=$1;
1025: $checkreferer=0;
1026: }
1027: }
1028:
1029: if (($ENV{'HTTP_REFERER'}) && ($checkreferer)) {
1030: my $refuri=$ENV{'HTTP_REFERER'};
1031: $refuri=~s/^http\:\/\/$ENV{'request.host'}//i;
1032: $refuri=&declutter($refuri);
1033: my @uriparts=split(/\//,$refuri);
1034: my $filename=$uriparts[$#uriparts];
1035: my $pathname=$refuri;
1036: $pathname=~s/\/$filename$//;
1037: my @filenameparts=split(/\./,$uri);
1038: if (&fileembstyle($filenameparts[$#filenameparts]) ne 'ssi') {
1039: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1040: /\&$filename\:([\d\|]+)\&/) {
1041: my $refstatecond=$1;
1042: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1043: =~/$priv\&([^\:]*)/) {
1044: $thisallowed.=$1;
1045: $uri=$refuri;
1046: $statecond=$refstatecond;
1047: }
1048: }
1049: }
1050: }
1051: }
1052:
1053: #
1054: # Gathered now: all privileges that could apply, and condition number
1055: #
1056: #
1057: # Full or no access?
1058: #
1059:
1060: if ($thisallowed=~/F/) {
1061: return 'F';
1062: }
1063:
1064: unless ($thisallowed) {
1065: return '';
1066: }
1067:
1068: # Restrictions exist, deal with them
1069: #
1070: # C:according to course preferences
1071: # R:according to resource settings
1072: # L:unless locked
1073: # X:according to user session state
1074: #
1075:
1076: # Possibly locked functionality, check all courses
1077: # Locks might take effect only after 10 minutes cache expiration for other
1078: # courses, and 2 minutes for current course
1079:
1080: my $envkey;
1081: if ($thisallowed=~/L/) {
1082: foreach $envkey (keys %ENV) {
1083: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1084: my $courseid=$2;
1085: my $roleid=$1.'.'.$2;
1086: $courseid=~s/^\///;
1087: my $expiretime=600;
1088: if ($ENV{'request.role'} eq $roleid) {
1089: $expiretime=120;
1090: }
1091: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1092: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1093: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1094: &coursedescription($courseid);
1095: }
1096: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1097: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1098: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1099: &log($ENV{'user.domain'},$ENV{'user.name'},
1100: $ENV{'user.host'},
1101: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1102: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1103: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1104: return '';
1105: }
1106: }
1107: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1108: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1109: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1110: &log($ENV{'user.domain'},$ENV{'user.name'},
1111: $ENV{'user.host'},
1112: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1113: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1114: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1115: return '';
1116: }
1117: }
1118: }
1119: }
1120: }
1121:
1122: #
1123: # Rest of the restrictions depend on selected course
1124: #
1125:
1126: unless ($ENV{'request.course.id'}) {
1127: return '1';
1128: }
1129:
1130: #
1131: # Now user is definitely in a course
1132: #
1133:
1134:
1135: # Course preferences
1136:
1137: if ($thisallowed=~/C/) {
1138: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1139: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1140: =~/\,$rolecode\,/) {
1141: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1142: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1143: $ENV{'request.course.id'});
1144: return '';
1145: }
1146: }
1147:
1148: # Resource preferences
1149:
1150: if ($thisallowed=~/R/) {
1151: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1152: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1153: if (-e $filename) {
1154: my @content;
1155: {
1156: my $fh=Apache::File->new($filename);
1157: @content=<$fh>;
1158: }
1159: if (join('',@content)=~
1160: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1161: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1162: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1163: return '';
1164:
1165: }
1166: }
1167: }
1168:
1169: # Restricted by state?
1170:
1171: if ($thisallowed=~/X/) {
1172: if (&condval($statecond)) {
1173: return '2';
1174: } else {
1175: return '';
1176: }
1177: }
1178:
1179: return 'F';
1180: }
1181:
1182: # ----------------------------------------------------------------- Define Role
1183:
1184: sub definerole {
1185: if (allowed('mcr','/')) {
1186: my ($rolename,$sysrole,$domrole,$courole)=@_;
1187: map {
1188: my ($crole,$cqual)=split(/\&/,$_);
1189: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1190: if ($pr{'cr:s'}=~/$crole\&/) {
1191: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1192: return "refused:s:$crole&$cqual";
1193: }
1194: }
1195: } split('/',$sysrole);
1196: map {
1197: my ($crole,$cqual)=split(/\&/,$_);
1198: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1199: if ($pr{'cr:d'}=~/$crole\&/) {
1200: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1201: return "refused:d:$crole&$cqual";
1202: }
1203: }
1204: } split('/',$domrole);
1205: map {
1206: my ($crole,$cqual)=split(/\&/,$_);
1207: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1208: if ($pr{'cr:c'}=~/$crole\&/) {
1209: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1210: return "refused:c:$crole&$cqual";
1211: }
1212: }
1213: } split('/',$courole);
1214: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1215: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1216: "rolesdef_$rolename=".
1217: escape($sysrole.'_'.$domrole.'_'.$courole);
1218: return reply($command,$ENV{'user.home'});
1219: } else {
1220: return 'refused';
1221: }
1222: }
1223:
1224: # ---------------- Make a metadata query against the network of library servers
1225:
1226: sub metadata_query {
1227: my ($query)=@_;
1228: my $reply=&reply("querysend:".&escape($query),'msul3');
1229: }
1230:
1231: # ------------------------------------------------------------------ Plain Text
1232:
1233: sub plaintext {
1234: my $short=shift;
1235: return $prp{$short};
1236: }
1237:
1238: # ------------------------------------------------------------------ Plain Text
1239:
1240: sub fileembstyle {
1241: my $ending=shift;
1242: return $fe{$ending};
1243: }
1244:
1245: # ------------------------------------------------------------ Description Text
1246:
1247: sub filedescription {
1248: my $ending=shift;
1249: return $fd{$ending};
1250: }
1251:
1252: # ----------------------------------------------------------------- Assign Role
1253:
1254: sub assignrole {
1255: my ($udom,$uname,$url,$role,$end,$start)=@_;
1256: my $mrole;
1257: if ($role =~ /^cr\//) {
1258: unless (&allowed('ccr',$url)) {
1259: &logthis('Refused custom assignrole: '.
1260: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1261: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1262: return 'refused';
1263: }
1264: $mrole='cr';
1265: } else {
1266: my $cwosec=$url;
1267: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1268: unless (&allowed('c'.$role,$cwosec)) {
1269: &logthis('Refused assignrole: '.
1270: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1271: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1272: return 'refused';
1273: }
1274: $mrole=$role;
1275: }
1276: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1277: "$udom:$uname:$url".'_'."$mrole=$role";
1278: if ($end) { $command.='_'.$end; }
1279: if ($start) {
1280: if ($end) {
1281: $command.='_'.$start;
1282: } else {
1283: $command.='_0_'.$start;
1284: }
1285: }
1286: return &reply($command,&homeserver($uname,$udom));
1287: }
1288:
1289: # --------------------------------------------------------------- Modify a user
1290:
1291:
1292: sub modifyuser {
1293: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1294: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1295: $umode.', '.$first.', '.$middle.', '.
1296: $last.', '.$gene.' by '.
1297: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1298: my $uhome=&homeserver($uname,$udom);
1299: # ----------------------------------------------------------------- Create User
1300: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1301: my $unhome='';
1302: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1303: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1304: } else {
1305: my $tryserver;
1306: my $loadm=10000000;
1307: foreach $tryserver (keys %libserv) {
1308: if ($hostdom{$tryserver} eq $udom) {
1309: my $answer=reply('load',$tryserver);
1310: if (($answer=~/\d+/) && ($answer<$loadm)) {
1311: $loadm=$answer;
1312: $unhome=$tryserver;
1313: }
1314: }
1315: }
1316: }
1317: if (($unhome eq '') || ($unhome eq 'no_host')) {
1318: return 'error: find home';
1319: }
1320: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1321: &escape($upass),$unhome);
1322: unless ($reply eq 'ok') {
1323: return 'error: '.$reply;
1324: }
1325: $uhome=&homeserver($uname,$udom);
1326: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1327: return 'error: verify home';
1328: }
1329: }
1330: # ---------------------------------------------------------------------- Add ID
1331: if ($uid) {
1332: $uid=~tr/A-Z/a-z/;
1333: my %uidhash=&idrget($udom,$uname);
1334: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1335: unless ($uid eq $uidhash{$uname}) {
1336: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1337: }
1338: } else {
1339: &idput($udom,($uname => $uid));
1340: }
1341: }
1342: # -------------------------------------------------------------- Add names, etc
1343: my $names=&reply('get:'.$udom.':'.$uname.
1344: ':environment:firstname&middlename&lastname&generation',
1345: $uhome);
1346: my ($efirst,$emiddle,$elast,$egene)=split(/\&/,$names);
1347: if ($first) { $efirst = &escape($first); }
1348: if ($middle) { $emiddle = &escape($middle); }
1349: if ($last) { $elast = &escape($last); }
1350: if ($gene) { $egene = &escape($gene); }
1351: my $reply=&reply('put:'.$udom.':'.$uname.
1352: ':environment:firstname='.$efirst.
1353: '&middlename='.$emiddle.
1354: '&lastname='.$elast.
1355: '&generation='.$egene,$uhome);
1356: if ($reply ne 'ok') {
1357: return 'error: '.$reply;
1358: }
1359: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1360: $umode.', '.$first.', '.$middle.', '.
1361: $last.', '.$gene.' by '.
1362: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1363: return 'ok';
1364: }
1365:
1366: # -------------------------------------------------------------- Modify student
1367:
1368: sub modifystudent {
1369: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1370: $end,$start)=@_;
1371: my $cid='';
1372: unless ($cid=$ENV{'request.course.id'}) {
1373: return 'not_in_class';
1374: }
1375: # --------------------------------------------------------------- Make the user
1376: my $reply=&modifyuser
1377: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1378: unless ($reply eq 'ok') { return $reply; }
1379: my $uhome=&homeserver($uname,$udom);
1380: if (($uhome eq '') || ($uhome eq 'no_host')) {
1381: return 'error: no such user';
1382: }
1383: # -------------------------------------------------- Add student to course list
1384: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1385: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1386: &escape($uname.':'.$udom).'='.
1387: &escape($end.':'.$start),
1388: $ENV{'course.'.$cid.'.home'});
1389: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1390: return 'error: '.$reply;
1391: }
1392: # ---------------------------------------------------- Add student role to user
1393: my $uurl='/'.$cid;
1394: $uurl=~s/\_/\//g;
1395: if ($usec) {
1396: $uurl.='/'.$usec;
1397: }
1398: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1399: }
1400:
1401: # ------------------------------------------------- Write to course preferences
1402:
1403: sub writecoursepref {
1404: my ($courseid,%prefs)=@_;
1405: $courseid=~s/^\///;
1406: $courseid=~s/\_/\//g;
1407: my ($cdomain,$cnum)=split(/\//,$courseid);
1408: my $chome=homeserver($cnum,$cdomain);
1409: if (($chome eq '') || ($chome eq 'no_host')) {
1410: return 'error: no such course';
1411: }
1412: my $cstring='';
1413: map {
1414: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1415: } keys %prefs;
1416: $cstring=~s/\&$//;
1417: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1418: }
1419:
1420: # ---------------------------------------------------------- Make/modify course
1421:
1422: sub createcourse {
1423: my ($udom,$description,$url)=@_;
1424: $url=&declutter($url);
1425: my $cid='';
1426: unless (&allowed('ccc',$ENV{'user.domain'})) {
1427: return 'refused';
1428: }
1429: unless ($udom eq $ENV{'user.domain'}) {
1430: return 'refused';
1431: }
1432: # ------------------------------------------------------------------- Create ID
1433: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1434: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1435: # ----------------------------------------------- Make sure that does not exist
1436: my $uhome=&homeserver($uname,$udom);
1437: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1438: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1439: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1440: $uhome=&homeserver($uname,$udom);
1441: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1442: return 'error: unable to generate unique course-ID';
1443: }
1444: }
1445: # ------------------------------------------------------------- Make the course
1446: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1447: $ENV{'user.home'});
1448: unless ($reply eq 'ok') { return 'error: '.$reply; }
1449: my $uhome=&homeserver($uname,$udom);
1450: if (($uhome eq '') || ($uhome eq 'no_host')) {
1451: return 'error: no such course';
1452: }
1453: &writecoursepref($udom.'_'.$uname,
1454: ('description' => $description,
1455: 'url' => $url));
1456: return '/'.$udom.'/'.$uname;
1457: }
1458:
1459: # ---------------------------------------------------------- Assign Custom Role
1460:
1461: sub assigncustomrole {
1462: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1463: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1464: $end,$start);
1465: }
1466:
1467: # ----------------------------------------------------------------- Revoke Role
1468:
1469: sub revokerole {
1470: my ($udom,$uname,$url,$role)=@_;
1471: my $now=time;
1472: return &assignrole($udom,$uname,$url,$role,$now);
1473: }
1474:
1475: # ---------------------------------------------------------- Revoke Custom Role
1476:
1477: sub revokecustomrole {
1478: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1479: my $now=time;
1480: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1481: }
1482:
1483: # ------------------------------------------------------------ Directory lister
1484:
1485: sub dirlist {
1486: my $uri=shift;
1487: $uri=~s/^\///;
1488: $uri=~s/\/$//;
1489: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1490: if ($udom) {
1491: if ($uname) {
1492: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1493: homeserver($uname,$udom));
1494: return split(/:/,$listing);
1495: } else {
1496: my $tryserver;
1497: my %allusers=();
1498: foreach $tryserver (keys %libserv) {
1499: if ($hostdom{$tryserver} eq $udom) {
1500: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1501: $tryserver);
1502: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1503: && ($listing ne 'con_lost')) {
1504: map {
1505: my ($entry,@stat)=split(/&/,$_);
1506: $allusers{$entry}=1;
1507: } split(/:/,$listing);
1508: }
1509: }
1510: }
1511: my $alluserstr='';
1512: map {
1513: $alluserstr.=$_.'&user:';
1514: } sort keys %allusers;
1515: $alluserstr=~s/:$//;
1516: return split(/:/,$alluserstr);
1517: }
1518: } else {
1519: my $tryserver;
1520: my %alldom=();
1521: foreach $tryserver (keys %libserv) {
1522: $alldom{$hostdom{$tryserver}}=1;
1523: }
1524: my $alldomstr='';
1525: map {
1526: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1527: } sort keys %alldom;
1528: $alldomstr=~s/:$//;
1529: return split(/:/,$alldomstr);
1530: }
1531: }
1532:
1533: # -------------------------------------------------------- Value of a Condition
1534:
1535: sub directcondval {
1536: my $number=shift;
1537: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1538: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1539: } else {
1540: return 2;
1541: }
1542: }
1543:
1544: sub condval {
1545: my $condidx=shift;
1546: my $result=0;
1547: my $allpathcond='';
1548: map {
1549: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
1550: $allpathcond.=
1551: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
1552: }
1553: } split(/\|/,$condidx);
1554: $allpathcond=~s/\|$//;
1555: if ($ENV{'request.course.id'}) {
1556: if ($allpathcond) {
1557: my $operand='|';
1558: my @stack;
1559: map {
1560: if ($_ eq '(') {
1561: push @stack,($operand,$result)
1562: } elsif ($_ eq ')') {
1563: my $before=pop @stack;
1564: if (pop @stack eq '&') {
1565: $result=$result>$before?$before:$result;
1566: } else {
1567: $result=$result>$before?$result:$before;
1568: }
1569: } elsif (($_ eq '&') || ($_ eq '|')) {
1570: $operand=$_;
1571: } else {
1572: my $new=directcondval($_);
1573: if ($operand eq '&') {
1574: $result=$result>$new?$new:$result;
1575: } else {
1576: $result=$result>$new?$result:$new;
1577: }
1578: }
1579: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
1580: }
1581: }
1582: return $result;
1583: }
1584:
1585: # --------------------------------------------------------- Value of a Variable
1586:
1587: sub EXT {
1588: my $varname=shift;
1589: unless ($varname) { return ''; }
1590: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
1591: my $rest;
1592: if ($therest[0]) {
1593: $rest=join('.',@therest);
1594: } else {
1595: $rest='';
1596: }
1597: my $qualifierrest=$qualifier;
1598: if ($rest) { $qualifierrest.='.'.$rest; }
1599: my $spacequalifierrest=$space;
1600: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1601: if ($realm eq 'user') {
1602: # --------------------------------------------------------------- user.resource
1603: if ($space eq 'resource') {
1604: my %restored=&restore;
1605: return $restored{$qualifierrest};
1606: # ----------------------------------------------------------------- user.access
1607: } elsif ($space eq 'access') {
1608: return &allowed($qualifier,$rest);
1609: # ------------------------------------------ user.preferences, user.environment
1610: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1611: return $ENV{join('.',('environment',$qualifierrest))};
1612: # ----------------------------------------------------------------- user.course
1613: } elsif ($space eq 'course') {
1614: return $ENV{join('.',('request.course',$qualifier))};
1615: # ------------------------------------------------------------------- user.role
1616: } elsif ($space eq 'role') {
1617: my ($role,$where)=split(/\./,$ENV{'request.role'});
1618: if ($qualifier eq 'value') {
1619: return $role;
1620: } elsif ($qualifier eq 'extent') {
1621: return $where;
1622: }
1623: # ----------------------------------------------------------------- user.domain
1624: } elsif ($space eq 'domain') {
1625: return $ENV{'user.domain'};
1626: # ------------------------------------------------------------------- user.name
1627: } elsif ($space eq 'name') {
1628: return $ENV{'user.name'};
1629: # ---------------------------------------------------- Any other user namespace
1630: } else {
1631: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
1632: my %reply=&get($space,$item);
1633: return $reply{$item};
1634: }
1635: } elsif ($realm eq 'request') {
1636: # ------------------------------------------------------------- request.browser
1637: if ($space eq 'browser') {
1638: return $ENV{'browser.'.$qualifier};
1639: # ------------------------------------------------------------ request.filename
1640: } else {
1641: return $ENV{'request.'.$spacequalifierrest};
1642: }
1643: } elsif ($realm eq 'course') {
1644: # ---------------------------------------------------------- course.description
1645: my $section='';
1646: if ($ENV{'request.course.sec'}) {
1647: $section='_'.$ENV{'request.course.sec'};
1648: }
1649: return $ENV{'course.'.$ENV{'request.course.id'}.$section.'.'.
1650: $spacequalifierrest};
1651: } elsif ($realm eq 'resource') {
1652: if ($ENV{'request.course.id'}) {
1653: # ----------------------------------------------------- Cascading lookup scheme
1654: my $symbp=&symbread();
1655: my $mapp=(split(/\_\_\_/,$symbp))[0];
1656:
1657: my $symbparm=$symbp.'.'.$spacequalifierrest;
1658: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
1659:
1660: my $seclevel=
1661: $ENV{'request.course.id'}.'.['.
1662: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
1663: my $seclevelr=
1664: $ENV{'request.course.id'}.'.['.
1665: $ENV{'request.course.sec'}.'].'.$symbparm;
1666: my $seclevelm=
1667: $ENV{'request.course.id'}.'.['.
1668: $ENV{'request.course.sec'}.'].'.$mapparm;
1669:
1670: my $courselevel=
1671: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
1672: my $courselevelr=
1673: $ENV{'request.course.id'}.'.'.$symbparm;
1674: my $courselevelm=
1675: $ENV{'request.course.id'}.'.'.$mapparm;
1676:
1677: # ----------------------------------------------------------- first, check user
1678: my %resourcedata=get('resourcedata',
1679: ($courselevelr,$courselevelm,$courselevel));
1680: if (($resourcedata{$courselevelr}!~/^error\:/) &&
1681: ($resourcedata{$courselevelr}!~/^con_lost/)) {
1682:
1683: if ($resourcedata{$courselevelr}) {
1684: return $resourcedata{$courselevelr}; }
1685: if ($resourcedata{$courselevelm}) {
1686: return $resourcedata{$courselevelm}; }
1687: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
1688:
1689: } else {
1690: if ($resourcedata{$courselevelr}!~/No such file/) {
1691: &logthis("<font color=blue>WARNING:".
1692: " Trying to get resource data for ".$ENV{'user.name'}." at "
1693: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
1694: "</font>");
1695: }
1696: }
1697:
1698: # -------------------------------------------------------- second, check course
1699:
1700: my $reply=&reply('get:'.
1701: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
1702: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1703: ':resourcedata:'.
1704: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
1705: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
1706: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
1707: if ($reply!~/^error\:/) {
1708: map {
1709: if ($_) { return &unescape($_); }
1710: } split(/\&/,$reply);
1711: }
1712: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
1713: &logthis("<font color=blue>WARNING:".
1714: " Getting ".$reply." asking for ".$varname." for ".
1715: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1716: ' at '.
1717: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
1718: ' from '.
1719: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
1720: "</font>");
1721: }
1722: # ------------------------------------------------------ third, check map parms
1723: my %parmhash=();
1724: my $thisparm='';
1725: if (tie(%parmhash,'GDBM_File',
1726: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
1727: $thisparm=$parmhash{$symbparm};
1728: untie(%parmhash);
1729: }
1730: if ($thisparm) { return $thisparm; }
1731: }
1732:
1733: # --------------------------------------------- last, look in resource metadata
1734:
1735: $spacequalifierrest=~s/\./\_/;
1736: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
1737: if ($metadata) { return $metadata; }
1738: $metadata=&metadata($ENV{'request.filename'},
1739: 'parameter_'.$spacequalifierrest);
1740: if ($metadata) { return $metadata; }
1741:
1742: # ---------------------------------------------------- Any other user namespace
1743: } elsif ($realm eq 'environment') {
1744: # ----------------------------------------------------------------- environment
1745: return $ENV{$spacequalifierrest};
1746: } elsif ($realm eq 'system') {
1747: # ----------------------------------------------------------------- system.time
1748: if ($space eq 'time') {
1749: return time;
1750: }
1751: }
1752: return '';
1753: }
1754:
1755: # ---------------------------------------------------------------- Get metadata
1756:
1757: sub metadata {
1758: my ($uri,$what)=@_;
1759:
1760: $uri=&declutter($uri);
1761: my $filename=$uri;
1762: $uri=~s/\.meta$//;
1763: unless ($metacache{$uri.':keys'}) {
1764: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
1765: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
1766: my $parser=HTML::TokeParser->new(\$metastring);
1767: my $token;
1768: while ($token=$parser->get_token) {
1769: if ($token->[0] eq 'S') {
1770: my $entry=$token->[1];
1771: my $unikey=$entry;
1772: if (defined($token->[2]->{'part'})) {
1773: $unikey.='_'.$token->[2]->{'part'};
1774: }
1775: if (defined($token->[2]->{'name'})) {
1776: $unikey.='_'.$token->[2]->{'name'};
1777: }
1778: if ($metacache{$uri.':keys'}) {
1779: $metacache{$uri.':keys'}.=','.$unikey;
1780: } else {
1781: $metacache{$uri.':keys'}=$unikey;
1782: }
1783: map {
1784: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
1785: } @{$token->[3]};
1786: unless (
1787: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
1788: ) { $metacache{$uri.':'.$unikey}=
1789: $metacache{$uri.':'.$unikey.'.default'};
1790: }
1791: }
1792: }
1793: }
1794: return $metacache{$uri.':'.$what};
1795: }
1796:
1797: # ------------------------------------------------- Update symbolic store links
1798:
1799: sub symblist {
1800: my ($mapname,%newhash)=@_;
1801: $mapname=declutter($mapname);
1802: my %hash;
1803: if (($ENV{'request.course.fn'}) && (%newhash)) {
1804: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1805: &GDBM_WRCREAT,0640)) {
1806: map {
1807: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
1808: } keys %newhash;
1809: if (untie(%hash)) {
1810: return 'ok';
1811: }
1812: }
1813: }
1814: return 'error';
1815: }
1816:
1817: # ------------------------------------------------------ Return symb list entry
1818:
1819: sub symbread {
1820: my $thisfn=shift;
1821: unless ($thisfn) {
1822: $thisfn=$ENV{'request.filename'};
1823: }
1824: $thisfn=declutter($thisfn);
1825: my %hash;
1826: my %bighash;
1827: my $syval='';
1828: if (($ENV{'request.course.fn'}) && ($thisfn)) {
1829: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1830: &GDBM_READER,0640)) {
1831: $syval=$hash{$thisfn};
1832: untie(%hash);
1833: }
1834: # ---------------------------------------------------------- There was an entry
1835: if ($syval) {
1836: unless ($syval=~/\_\d+$/) {
1837: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
1838: &appenv('request.ambiguous' => $thisfn);
1839: return '';
1840: }
1841: $syval.=$1;
1842: }
1843: } else {
1844: # ------------------------------------------------------- Was not in symb table
1845: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1846: &GDBM_READER,0640)) {
1847: # ---------------------------------------------- Get ID(s) for current resource
1848: my $ids=$bighash{'ids_/res/'.$thisfn};
1849: unless ($ids) {
1850: $ids=$bighash{'ids_/'.$thisfn};
1851: }
1852: if ($ids) {
1853: # ------------------------------------------------------------------- Has ID(s)
1854: my @possibilities=split(/\,/,$ids);
1855: if ($#possibilities==0) {
1856: # ----------------------------------------------- There is only one possibility
1857: my ($mapid,$resid)=split(/\./,$ids);
1858: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
1859: } else {
1860: # ------------------------------------------ There is more than one possibility
1861: my $realpossible=0;
1862: map {
1863: my $file=$bighash{'src_'.$_};
1864: if (&allowed('bre',$file)) {
1865: my ($mapid,$resid)=split(/\./,$_);
1866: if ($bighash{'map_type_'.$mapid} ne 'page') {
1867: $realpossible++;
1868: $syval=declutter($bighash{'map_id_'.$mapid}).
1869: '___'.$resid;
1870: }
1871: }
1872: } @possibilities;
1873: if ($realpossible!=1) { $syval=''; }
1874: }
1875: }
1876: untie(%bighash)
1877: }
1878: }
1879: if ($syval) {
1880: return $syval.'___'.$thisfn;
1881: }
1882: }
1883: &appenv('request.ambiguous' => $thisfn);
1884: return '';
1885: }
1886:
1887: # ---------------------------------------------------------- Return random seed
1888:
1889: sub numval {
1890: my $txt=shift;
1891: $txt=~tr/A-J/0-9/;
1892: $txt=~tr/a-j/0-9/;
1893: $txt=~tr/K-T/0-9/;
1894: $txt=~tr/k-t/0-9/;
1895: $txt=~tr/U-Z/0-5/;
1896: $txt=~tr/u-z/0-5/;
1897: $txt=~s/\D//g;
1898: return int($txt);
1899: }
1900:
1901: sub rndseed {
1902: my $symb;
1903: unless ($symb=&symbread()) { return time; }
1904: {
1905: use integer;
1906: my $symbchck=unpack("%32C*",$symb) << 27;
1907: my $symbseed=numval($symb) << 22;
1908: my $namechck=unpack("%32C*",$ENV{'user.name'}) << 17;
1909: my $nameseed=numval($ENV{'user.name'}) << 12;
1910: my $domainseed=unpack("%32C*",$ENV{'user.domain'}) << 7;
1911: my $courseseed=unpack("%32C*",$ENV{'request.course.id'});
1912: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
1913: #uncommenting these lines can break things!
1914: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
1915: #&Apache::lonxml::debug("rndseed :$num:$symb");
1916: return $num;
1917: }
1918: }
1919:
1920: sub ireceipt {
1921: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
1922: my $cuname=unpack("%32C*",$funame);
1923: my $cudom=unpack("%32C*",$fudom);
1924: my $cucourseid=unpack("%32C*",$fucourseid);
1925: my $cusymb=unpack("%32C*",$fusymb);
1926: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
1927: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
1928: ($cunique%$cuname+
1929: $cunique%$cudom+
1930: $cusymb%$cuname+
1931: $cusymb%$cudom+
1932: $cucourseid%$cuname+
1933: $cucourseid%$cudom);
1934: }
1935:
1936: sub receipt {
1937: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
1938: $ENV{'request.course.id'},&symbread());
1939: }
1940:
1941: # ------------------------------------------------------------ Serves up a file
1942: # returns either the contents of the file or a -1
1943: sub getfile {
1944: my $file=shift;
1945: &repcopy($file);
1946: if (! -e $file ) { return -1; };
1947: my $fh=Apache::File->new($file);
1948: my $a='';
1949: while (<$fh>) { $a .=$_; }
1950: return $a
1951: }
1952:
1953: sub filelocation {
1954: my ($dir,$file) = @_;
1955: my $location;
1956: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
1957: if ($file=~m:^/~:) { # is a contruction space reference
1958: $location = $file;
1959: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
1960: } else {
1961: $file=~s/^$perlvar{'lonDocRoot'}//;
1962: $file=~s:^/*res::;
1963: if ( !( $file =~ m:^/:) ) {
1964: $location = $dir. '/'.$file;
1965: } else {
1966: $location = '/home/httpd/html/res'.$file;
1967: }
1968: }
1969: $location=~s://+:/:g; # remove duplicate /
1970: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
1971: return $location;
1972: }
1973:
1974: sub hreflocation {
1975: my ($dir,$file)=@_;
1976: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
1977: my $finalpath=filelocation($dir,$file);
1978: $finalpath=~s/^\/home\/httpd\/html//;
1979: return $finalpath;
1980: } else {
1981: return $file;
1982: }
1983: }
1984:
1985: # ------------------------------------------------------------- Declutters URLs
1986:
1987: sub declutter {
1988: my $thisfn=shift;
1989: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
1990: $thisfn=~s/^\///;
1991: $thisfn=~s/^res\///;
1992: return $thisfn;
1993: }
1994:
1995: # -------------------------------------------------------- Escape Special Chars
1996:
1997: sub escape {
1998: my $str=shift;
1999: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2000: return $str;
2001: }
2002:
2003: # ----------------------------------------------------- Un-Escape Special Chars
2004:
2005: sub unescape {
2006: my $str=shift;
2007: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2008: return $str;
2009: }
2010:
2011: # ================================================================ Main Program
2012:
2013: sub BEGIN {
2014: if ($readit ne 'done') {
2015: # ------------------------------------------------------------ Read access.conf
2016: {
2017: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2018:
2019: while (my $configline=<$config>) {
2020: if ($configline =~ /PerlSetVar/) {
2021: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2022: chomp($varvalue);
2023: $perlvar{$varname}=$varvalue;
2024: }
2025: }
2026: }
2027:
2028: # ------------------------------------------------------------- Read hosts file
2029: {
2030: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2031:
2032: while (my $configline=<$config>) {
2033: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2034: $hostname{$id}=$name;
2035: $hostdom{$id}=$domain;
2036: if ($role eq 'library') { $libserv{$id}=$name; }
2037: }
2038: }
2039:
2040: # ------------------------------------------------------ Read spare server file
2041: {
2042: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2043:
2044: while (my $configline=<$config>) {
2045: chomp($configline);
2046: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2047: $spareid{$configline}=1;
2048: }
2049: }
2050: }
2051: # ------------------------------------------------------------ Read permissions
2052: {
2053: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2054:
2055: while (my $configline=<$config>) {
2056: chomp($configline);
2057: my ($role,$perm)=split(/ /,$configline);
2058: if ($perm ne '') { $pr{$role}=$perm; }
2059: }
2060: }
2061:
2062: # -------------------------------------------- Read plain texts for permissions
2063: {
2064: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2065:
2066: while (my $configline=<$config>) {
2067: chomp($configline);
2068: my ($short,$plain)=split(/:/,$configline);
2069: if ($plain ne '') { $prp{$short}=$plain; }
2070: }
2071: }
2072:
2073: # ------------------------------------------------------------- Read file types
2074: {
2075: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2076:
2077: while (my $configline=<$config>) {
2078: chomp($configline);
2079: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2080: if ($descr[0] ne '') {
2081: $fe{$ending}=$emb;
2082: $fd{$ending}=join(' ',@descr);
2083: }
2084: }
2085: }
2086:
2087: %metacache=();
2088:
2089: $readit='done';
2090: &logthis('<font color=yellow>INFO: Read configuration</font>');
2091: }
2092: }
2093: 1;
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