1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # Functions for use by content handlers:
5: #
6: # metadata_query(sql-query-string,custom-metadata-regex) :
7: # returns file handle of where sql and
8: # regex results will be stored for query
9: # plaintext(short) : plain text explanation of short term
10: # fileembstyle(ext) : embed style in page for file extension
11: # filedescription(ext) : descriptor text for file extension
12: # allowed(short,url) : returns codes for allowed actions
13: # F: full access
14: # U,I,K: authentication modes (cxx only)
15: # '': forbidden
16: # 1: user needs to choose course
17: # 2: browse allowed
18: # definerole(rolename,sys,dom,cou) : define a custom role rolename
19: # set privileges in format of lonTabs/roles.tab for
20: # system, domain and course level,
21: # assignrole(udom,uname,url,role,end,start) : give a role to a user for the
22: # level given by url. Optional start and end dates
23: # (leave empty string or zero for "no date")
24: # assigncustomrole (udom,uname,url,rdom,rnam,rolename,end,start) : give a
25: # custom role to a user for the level given by url.
26: # Specify name and domain of role author, and role name
27: # revokerole (udom,uname,url,role) : Revoke a role for url
28: # revokecustomrole (udom,uname,url,rdom,rnam,rolename) : Revoke a custom role
29: # appenv(hash) : adds hash to session environment
30: # delenv(varname) : deletes all environment entries starting with varname
31: # store(hashref,symb,courseid,udom,uname)
32: # : stores hash permanently for this url
33: # hashref needs to be given, and should be a \%hashname
34: # the remaining args aren't required and if they aren't
35: # passed or are '' they will be derived from the ENV
36: # cstore(hashref,symb,courseid,udom,uname)
37: # : same as store but uses the critical interface to
38: # guarentee a store
39: # restore(symb,courseid,udom,uname)
40: # : returns hash for this symb, all args are optional
41: # if they aren't given they will be derived from the
42: # current enviroment
43: # eget(namesp,array) : returns hash with keys from array filled in from namesp
44: # get(namesp,array) : returns hash with keys from array filled in from namesp
45: # del(namesp,array) : deletes keys out of array from namesp
46: # put(namesp,hash) : stores hash in namesp
47: # cput(namesp,hash) : critical put
48: # dump(namesp) : dumps the complete namespace into a hash
49: # ssi(url,hash) : does a complete request cycle on url to localhost, posts
50: # hash
51: # coursedescription(id) : returns and caches course description for id
52: # repcopy(filename) : replicate file
53: # dirlist(url) : gets a directory listing
54: # directcondval(index) : reading condition value of single condition from
55: # state string
56: # condval(index) : value of condition index based on state
57: # EXT(name) : value of a variable
58: # symblist(map,hash) : Updates symbolic storage links
59: # symbread([filename]) : returns the data handle (filename optional)
60: # rndseed() : returns a random seed
61: # receipt() : returns a receipt to be given out to users
62: # getfile(filename) : returns the contents of filename, or a -1 if it can't
63: # be found, replicates and subscribes to the file
64: # filelocation(dir,file) : returns a fairly clean absolute reference to file
65: # from the directory dir
66: # hreflocation(dir,file) : same as filelocation, but for hrefs
67: # log(domain,user,home,msg) : write to permanent log for user
68: # usection(domain,user,courseid) : output of section name/number or '' for
69: # "not in course" and '-1' for "no section"
70: # userenvironment(domain,user,what) : puts out any environment parameter
71: # for a user
72: # idput(domain,hash) : writes IDs for users from hash (name=>id,name=>id)
73: # idget(domain,array): returns hash with usernames (id=>name,id=>name) for
74: # an array of IDs
75: # idrget(domain,array): returns hash with IDs for usernames (name=>id,...) for
76: # an array of names
77: # metadata(file,entry): returns the metadata entry for a file. entry='keys'
78: # returns a comma separated list of keys
79: #
80: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
81: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
82: # 11/8,11/16,11/18,11/22,11/23,12/22,
83: # 01/06,01/13,02/24,02/28,02/29,
84: # 03/01,03/02,03/06,03/07,03/13,
85: # 04/05,05/29,05/31,06/01,
86: # 06/05,06/26 Gerd Kortemeyer
87: # 06/26 Ben Tyszka
88: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
89: # 08/14 Ben Tyszka
90: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
91: # 10/04 Gerd Kortemeyer
92: # 10/04 Guy Albertelli
93: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
94: # 10/30,10/31,
95: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
96: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
97: # 05/01/01 Guy Albertelli
98: # 05/01,06/01,09/01 Gerd Kortemeyer
99: # 09/01 Guy Albertelli
100: # 09/01,10/01,11/01 Gerd Kortemeyer
101: # 02/27/01 Scott Harrison
102: # 3/2 Gerd Kortemeyer
103: # 3/15,3/19 Scott Harrison
104: # 3/19,3/20 Gerd Kortemeyer
105: # 3/22,3/27,4/2,4/16,4/17 Scott Harrison
106: # 5/26 Gerd Kortemeyer
107: #
108: package Apache::lonnet;
109:
110: use strict;
111: use Apache::File;
112: use LWP::UserAgent();
113: use HTTP::Headers;
114: use vars
115: qw(%perlvar %hostname %homecache %spareid %hostdom %libserv %pr %prp %fe %fd $readit %metacache);
116: use IO::Socket;
117: use GDBM_File;
118: use Apache::Constants qw(:common :http);
119: use HTML::TokeParser;
120: use Fcntl qw(:flock);
121:
122: # --------------------------------------------------------------------- Logging
123:
124: sub logthis {
125: my $message=shift;
126: my $execdir=$perlvar{'lonDaemons'};
127: my $now=time;
128: my $local=localtime($now);
129: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
130: print $fh "$local ($$): $message\n";
131: return 1;
132: }
133:
134: sub logperm {
135: my $message=shift;
136: my $execdir=$perlvar{'lonDaemons'};
137: my $now=time;
138: my $local=localtime($now);
139: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
140: print $fh "$now:$message:$local\n";
141: return 1;
142: }
143:
144: # -------------------------------------------------- Non-critical communication
145: sub subreply {
146: my ($cmd,$server)=@_;
147: my $peerfile="$perlvar{'lonSockDir'}/$server";
148: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
149: Type => SOCK_STREAM,
150: Timeout => 10)
151: or return "con_lost";
152: print $client "$cmd\n";
153: my $answer=<$client>;
154: if (!$answer) { $answer="con_lost"; }
155: chomp($answer);
156: return $answer;
157: }
158:
159: sub reply {
160: my ($cmd,$server)=@_;
161: my $answer=subreply($cmd,$server);
162: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
163: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
164: &logthis("<font color=blue>WARNING:".
165: " $cmd to $server returned $answer</font>");
166: }
167: return $answer;
168: }
169:
170: # ----------------------------------------------------------- Send USR1 to lonc
171:
172: sub reconlonc {
173: my $peerfile=shift;
174: &logthis("Trying to reconnect for $peerfile");
175: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
176: if (my $fh=Apache::File->new("$loncfile")) {
177: my $loncpid=<$fh>;
178: chomp($loncpid);
179: if (kill 0 => $loncpid) {
180: &logthis("lonc at pid $loncpid responding, sending USR1");
181: kill USR1 => $loncpid;
182: sleep 1;
183: if (-e "$peerfile") { return; }
184: &logthis("$peerfile still not there, give it another try");
185: sleep 5;
186: if (-e "$peerfile") { return; }
187: &logthis(
188: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
189: } else {
190: &logthis(
191: "<font color=blue>WARNING:".
192: " lonc at pid $loncpid not responding, giving up</font>");
193: }
194: } else {
195: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
196: }
197: }
198:
199: # ------------------------------------------------------ Critical communication
200:
201: sub critical {
202: my ($cmd,$server)=@_;
203: unless ($hostname{$server}) {
204: &logthis("<font color=blue>WARNING:".
205: " Critical message to unknown server ($server)</font>");
206: return 'no_such_host';
207: }
208: my $answer=reply($cmd,$server);
209: if ($answer eq 'con_lost') {
210: my $pingreply=reply('ping',$server);
211: &reconlonc("$perlvar{'lonSockDir'}/$server");
212: my $pongreply=reply('pong',$server);
213: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
214: $answer=reply($cmd,$server);
215: if ($answer eq 'con_lost') {
216: my $now=time;
217: my $middlename=$cmd;
218: $middlename=substr($middlename,0,16);
219: $middlename=~s/\W//g;
220: my $dfilename=
221: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
222: {
223: my $dfh;
224: if ($dfh=Apache::File->new(">$dfilename")) {
225: print $dfh "$cmd\n";
226: }
227: }
228: sleep 2;
229: my $wcmd='';
230: {
231: my $dfh;
232: if ($dfh=Apache::File->new("$dfilename")) {
233: $wcmd=<$dfh>;
234: }
235: }
236: chomp($wcmd);
237: if ($wcmd eq $cmd) {
238: &logthis("<font color=blue>WARNING: ".
239: "Connection buffer $dfilename: $cmd</font>");
240: &logperm("D:$server:$cmd");
241: return 'con_delayed';
242: } else {
243: &logthis("<font color=red>CRITICAL:"
244: ." Critical connection failed: $server $cmd</font>");
245: &logperm("F:$server:$cmd");
246: return 'con_failed';
247: }
248: }
249: }
250: return $answer;
251: }
252:
253: # ---------------------------------------------------------- Append Environment
254:
255: sub appenv {
256: my %newenv=@_;
257: map {
258: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
259: &logthis("<font color=blue>WARNING: ".
260: "Attempt to modify environment ".$_." to ".$newenv{$_});
261: delete($newenv{$_});
262: } else {
263: $ENV{$_}=$newenv{$_};
264: }
265: } keys %newenv;
266:
267: my $lockfh;
268: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
269: return 'error: '.$!;
270: }
271: unless (flock($lockfh,LOCK_EX)) {
272: &logthis("<font color=blue>WARNING: ".
273: 'Could not obtain exclusive lock in appenv: '.$!);
274: $lockfh->close();
275: return 'error: '.$!;
276: }
277:
278: my @oldenv;
279: {
280: my $fh;
281: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
282: return 'error: '.$!;
283: }
284: @oldenv=<$fh>;
285: $fh->close();
286: }
287: for (my $i=0; $i<=$#oldenv; $i++) {
288: chomp($oldenv[$i]);
289: if ($oldenv[$i] ne '') {
290: my ($name,$value)=split(/=/,$oldenv[$i]);
291: unless (defined($newenv{$name})) {
292: $newenv{$name}=$value;
293: }
294: }
295: }
296: {
297: my $fh;
298: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
299: return 'error';
300: }
301: my $newname;
302: foreach $newname (keys %newenv) {
303: print $fh "$newname=$newenv{$newname}\n";
304: }
305: $fh->close();
306: }
307:
308: $lockfh->close();
309: return 'ok';
310: }
311: # ----------------------------------------------------- Delete from Environment
312:
313: sub delenv {
314: my $delthis=shift;
315: my %newenv=();
316: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
317: &logthis("<font color=blue>WARNING: ".
318: "Attempt to delete from environment ".$delthis);
319: return 'error';
320: }
321: my @oldenv;
322: {
323: my $fh;
324: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
325: return 'error';
326: }
327: unless (flock($fh,LOCK_SH)) {
328: &logthis("<font color=blue>WARNING: ".
329: 'Could not obtain shared lock in delenv: '.$!);
330: $fh->close();
331: return 'error: '.$!;
332: }
333: @oldenv=<$fh>;
334: $fh->close();
335: }
336: {
337: my $fh;
338: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
339: return 'error';
340: }
341: unless (flock($fh,LOCK_EX)) {
342: &logthis("<font color=blue>WARNING: ".
343: 'Could not obtain exclusive lock in delenv: '.$!);
344: $fh->close();
345: return 'error: '.$!;
346: }
347: map {
348: unless ($_=~/^$delthis/) { print $fh $_; }
349: } @oldenv;
350: $fh->close();
351: }
352: return 'ok';
353: }
354:
355: # ------------------------------ Find server with least workload from spare.tab
356:
357: sub spareserver {
358: my $tryserver;
359: my $spareserver='';
360: my $lowestserver=100;
361: foreach $tryserver (keys %spareid) {
362: my $answer=reply('load',$tryserver);
363: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
364: $spareserver="http://$hostname{$tryserver}";
365: $lowestserver=$answer;
366: }
367: }
368: return $spareserver;
369: }
370:
371: # --------- Try to authenticate user from domain's lib servers (first this one)
372:
373: sub authenticate {
374: my ($uname,$upass,$udom)=@_;
375: $upass=escape($upass);
376: if (($perlvar{'lonRole'} eq 'library') &&
377: ($udom eq $perlvar{'lonDefDomain'})) {
378: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
379: if ($answer =~ /authorized/) {
380: if ($answer eq 'authorized') {
381: &logthis("User $uname at $udom authorized by local server");
382: return $perlvar{'lonHostID'};
383: }
384: if ($answer eq 'non_authorized') {
385: &logthis("User $uname at $udom rejected by local server");
386: return 'no_host';
387: }
388: }
389: }
390:
391: my $tryserver;
392: foreach $tryserver (keys %libserv) {
393: if ($hostdom{$tryserver} eq $udom) {
394: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
395: if ($answer =~ /authorized/) {
396: if ($answer eq 'authorized') {
397: &logthis("User $uname at $udom authorized by $tryserver");
398: return $tryserver;
399: }
400: if ($answer eq 'non_authorized') {
401: &logthis("User $uname at $udom rejected by $tryserver");
402: return 'no_host';
403: }
404: }
405: }
406: }
407: &logthis("User $uname at $udom could not be authenticated");
408: return 'no_host';
409: }
410:
411: # ---------------------- Find the homebase for a user from domain's lib servers
412:
413: sub homeserver {
414: my ($uname,$udom)=@_;
415:
416: my $index="$uname:$udom";
417: if ($homecache{$index}) { return "$homecache{$index}"; }
418:
419: my $tryserver;
420: foreach $tryserver (keys %libserv) {
421: if ($hostdom{$tryserver} eq $udom) {
422: my $answer=reply("home:$udom:$uname",$tryserver);
423: if ($answer eq 'found') {
424: $homecache{$index}=$tryserver;
425: return $tryserver;
426: }
427: }
428: }
429: return 'no_host';
430: }
431:
432: # ------------------------------------- Find the usernames behind a list of IDs
433:
434: sub idget {
435: my ($udom,@ids)=@_;
436: my %returnhash=();
437:
438: my $tryserver;
439: foreach $tryserver (keys %libserv) {
440: if ($hostdom{$tryserver} eq $udom) {
441: my $idlist=join('&',@ids);
442: $idlist=~tr/A-Z/a-z/;
443: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
444: my @answer=();
445: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
446: @answer=split(/\&/,$reply);
447: } ;
448: my $i;
449: for ($i=0;$i<=$#ids;$i++) {
450: if ($answer[$i]) {
451: $returnhash{$ids[$i]}=$answer[$i];
452: }
453: }
454: }
455: }
456: return %returnhash;
457: }
458:
459: # ------------------------------------- Find the IDs behind a list of usernames
460:
461: sub idrget {
462: my ($udom,@unames)=@_;
463: my %returnhash=();
464: map {
465: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
466: } @unames;
467: return %returnhash;
468: }
469:
470: # ------------------------------- Store away a list of names and associated IDs
471:
472: sub idput {
473: my ($udom,%ids)=@_;
474: my %servers=();
475: map {
476: my $uhom=&homeserver($_,$udom);
477: if ($uhom ne 'no_host') {
478: my $id=&escape($ids{$_});
479: $id=~tr/A-Z/a-z/;
480: my $unam=&escape($_);
481: if ($servers{$uhom}) {
482: $servers{$uhom}.='&'.$id.'='.$unam;
483: } else {
484: $servers{$uhom}=$id.'='.$unam;
485: }
486: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
487: }
488: } keys %ids;
489: map {
490: &critical('idput:'.$udom.':'.$servers{$_},$_);
491: } keys %servers;
492: }
493:
494: # ------------------------------------- Find the section of student in a course
495:
496: sub usection {
497: my ($udom,$unam,$courseid)=@_;
498: $courseid=~s/\_/\//g;
499: $courseid=~s/^(\w)/\/$1/;
500: map {
501: my ($key,$value)=split(/\=/,$_);
502: $key=&unescape($key);
503: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
504: my $section=$1;
505: if ($key eq $courseid.'_st') { $section=''; }
506: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
507: my $now=time;
508: my $notactive=0;
509: if ($start) {
510: if ($now<$start) { $notactive=1; }
511: }
512: if ($end) {
513: if ($now>$end) { $notactive=1; }
514: }
515: unless ($notactive) { return $section; }
516: }
517: } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
518: &homeserver($unam,$udom)));
519: return '-1';
520: }
521:
522: # ------------------------------------- Read an entry from a user's environment
523:
524: sub userenvironment {
525: my ($udom,$unam,@what)=@_;
526: my %returnhash=();
527: my @answer=split(/\&/,
528: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
529: &homeserver($unam,$udom)));
530: my $i;
531: for ($i=0;$i<=$#what;$i++) {
532: $returnhash{$what[$i]}=&unescape($answer[$i]);
533: }
534: return %returnhash;
535: }
536:
537: # ----------------------------- Subscribe to a resource, return URL if possible
538:
539: sub subscribe {
540: my $fname=shift;
541: my $author=$fname;
542: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
543: my ($udom,$uname)=split(/\//,$author);
544: my $home=homeserver($uname,$udom);
545: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
546: return 'not_found';
547: }
548: my $answer=reply("sub:$fname",$home);
549: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
550: $answer.=' by '.$home;
551: }
552: return $answer;
553: }
554:
555: # -------------------------------------------------------------- Replicate file
556:
557: sub repcopy {
558: my $filename=shift;
559: $filename=~s/\/+/\//g;
560: my $transname="$filename.in.transfer";
561: if ((-e $filename) || (-e $transname)) { return OK; }
562: my $remoteurl=subscribe($filename);
563: if ($remoteurl =~ /^con_lost by/) {
564: &logthis("Subscribe returned $remoteurl: $filename");
565: return HTTP_SERVICE_UNAVAILABLE;
566: } elsif ($remoteurl eq 'not_found') {
567: &logthis("Subscribe returned not_found: $filename");
568: return HTTP_NOT_FOUND;
569: } elsif ($remoteurl =~ /^rejected by/) {
570: &logthis("Subscribe returned $remoteurl: $filename");
571: return FORBIDDEN;
572: } elsif ($remoteurl eq 'directory') {
573: return OK;
574: } else {
575: my @parts=split(/\//,$filename);
576: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
577: if ($path ne "$perlvar{'lonDocRoot'}/res") {
578: &logthis("Malconfiguration for replication: $filename");
579: return HTTP_BAD_REQUEST;
580: }
581: my $count;
582: for ($count=5;$count<$#parts;$count++) {
583: $path.="/$parts[$count]";
584: if ((-e $path)!=1) {
585: mkdir($path,0777);
586: }
587: }
588: my $ua=new LWP::UserAgent;
589: my $request=new HTTP::Request('GET',"$remoteurl");
590: my $response=$ua->request($request,$transname);
591: if ($response->is_error()) {
592: unlink($transname);
593: my $message=$response->status_line;
594: &logthis("<font color=blue>WARNING:"
595: ." LWP get: $message: $filename</font>");
596: return HTTP_SERVICE_UNAVAILABLE;
597: } else {
598: if ($remoteurl!~/\.meta$/) {
599: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
600: my $mresponse=$ua->request($mrequest,$filename.'.meta');
601: if ($mresponse->is_error()) {
602: unlink($filename.'.meta');
603: &logthis(
604: "<font color=yellow>INFO: No metadata: $filename</font>");
605: }
606: }
607: rename($transname,$filename);
608: return OK;
609: }
610: }
611: }
612:
613: # --------------------------------------------------------- Server Side Include
614:
615: sub ssi {
616:
617: my ($fn,%form)=@_;
618:
619: my $ua=new LWP::UserAgent;
620:
621: my $request;
622:
623: if (%form) {
624: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
625: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
626: } else {
627: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
628: }
629:
630: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
631: my $response=$ua->request($request);
632:
633: return $response->content;
634: }
635:
636: # ------------------------------------------------------------------------- Log
637:
638: sub log {
639: my ($dom,$nam,$hom,$what)=@_;
640: return critical("log:$dom:$nam:$what",$hom);
641: }
642:
643: # --------------------------------------------- Set Expire Date for Spreadsheet
644:
645: sub expirespread {
646: my ($uname,$udom,$stype,$usymb)=@_;
647: my $cid=$ENV{'request.course.id'};
648: if ($cid) {
649: my $now=time;
650: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
651: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
652: $ENV{'course.'.$cid.'.num'}.
653: ':nohist_expirationdates:'.
654: &escape($key).'='.$now,
655: $ENV{'course.'.$cid.'.home'})
656: }
657: return 'ok';
658: }
659:
660: # ----------------------------------------------------- Devalidate Spreadsheets
661:
662: sub devalidate {
663: my $symb=shift;
664: my $cid=$ENV{'request.course.id'};
665: if ($cid) {
666: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
667: my $status=
668: &reply('del:'.$ENV{'course.'.$cid.'.domain'}.':'.
669: $ENV{'course.'.$cid.'.num'}.
670: ':nohist_calculatedsheets:'.
671: &escape($key.'studentcalc:'),
672: $ENV{'course.'.$cid.'.home'})
673: .' '.
674: &reply('del:'.$ENV{'user.domain'}.':'.
675: $ENV{'user.name'}.
676: ':nohist_calculatedsheets_'.$cid.':'.
677: &escape($key.'assesscalc:'.$symb),
678: $ENV{'user.home'});
679: unless ($status eq 'ok ok') {
680: &logthis('Could not devalidate spreadsheet '.
681: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
682: $symb.': '.$status);
683: }
684: }
685: }
686:
687: # ----------------------------------------------------------------------- Store
688:
689: sub store {
690: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
691: my $home='';
692:
693: if ($stuname) {
694: $home=&homeserver($stuname,$domain);
695: }
696:
697: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
698:
699: &devalidate($symb);
700:
701: $symb=escape($symb);
702: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
703: if (!$domain) { $domain=$ENV{'user.domain'}; }
704: if (!$stuname) { $stuname=$ENV{'user.name'}; }
705: if (!$home) { $home=$ENV{'user.home'}; }
706: my $namevalue='';
707: map {
708: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
709: } keys %$storehash;
710: $namevalue=~s/\&$//;
711: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
712: }
713:
714: # -------------------------------------------------------------- Critical Store
715:
716: sub cstore {
717: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
718: my $home='';
719:
720: if ($stuname) {
721: $home=&homeserver($stuname,$domain);
722: }
723:
724: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
725:
726: &devalidate($symb);
727:
728: $symb=escape($symb);
729: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
730: if (!$domain) { $domain=$ENV{'user.domain'}; }
731: if (!$stuname) { $stuname=$ENV{'user.name'}; }
732: if (!$home) { $home=$ENV{'user.home'}; }
733:
734: my $namevalue='';
735: map {
736: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
737: } keys %$storehash;
738: $namevalue=~s/\&$//;
739: return critical("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
740: }
741:
742: # --------------------------------------------------------------------- Restore
743:
744: sub restore {
745: my ($symb,$namespace,$domain,$stuname) = @_;
746: my $home='';
747:
748: if ($stuname) {
749: $home=&homeserver($stuname,$domain);
750: }
751:
752: if (!$symb) {
753: unless ($symb=escape(&symbread())) { return ''; }
754: } else {
755: $symb=&escape($symb);
756: }
757: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
758: if (!$domain) { $domain=$ENV{'user.domain'}; }
759: if (!$stuname) { $stuname=$ENV{'user.name'}; }
760: if (!$home) { $home=$ENV{'user.home'}; }
761: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
762:
763: my %returnhash=();
764: map {
765: my ($name,$value)=split(/\=/,$_);
766: $returnhash{&unescape($name)}=&unescape($value);
767: } split(/\&/,$answer);
768: my $version;
769: for ($version=1;$version<=$returnhash{'version'};$version++) {
770: map {
771: $returnhash{$_}=$returnhash{$version.':'.$_};
772: } split(/\:/,$returnhash{$version.':keys'});
773: }
774: return %returnhash;
775: }
776:
777: # ---------------------------------------------------------- Course Description
778:
779: sub coursedescription {
780: my $courseid=shift;
781: $courseid=~s/^\///;
782: $courseid=~s/\_/\//g;
783: my ($cdomain,$cnum)=split(/\//,$courseid);
784: my $chome=homeserver($cnum,$cdomain);
785: if ($chome ne 'no_host') {
786: my $rep=reply("dump:$cdomain:$cnum:environment",$chome);
787: if ($rep ne 'con_lost') {
788: my $normalid=$cdomain.'_'.$cnum;
789: my %envhash=();
790: my %returnhash=('home' => $chome,
791: 'domain' => $cdomain,
792: 'num' => $cnum);
793: map {
794: my ($name,$value)=split(/\=/,$_);
795: $name=&unescape($name);
796: $value=&unescape($value);
797: $returnhash{$name}=$value;
798: $envhash{'course.'.$normalid.'.'.$name}=$value;
799: } split(/\&/,$rep);
800: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
801: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
802: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
803: $envhash{'course.'.$normalid.'.last_cache'}=time;
804: $envhash{'course.'.$normalid.'.home'}=$chome;
805: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
806: $envhash{'course.'.$normalid.'.num'}=$cnum;
807: &appenv(%envhash);
808: return %returnhash;
809: }
810: }
811: return ();
812: }
813:
814: # -------------------------------------------------------- Get user privileges
815:
816: sub rolesinit {
817: my ($domain,$username,$authhost)=@_;
818: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
819: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
820: my %allroles=();
821: my %thesepriv=();
822: my $now=time;
823: my $userroles="user.login.time=$now\n";
824: my $thesestr;
825:
826: if ($rolesdump ne '') {
827: map {
828: if ($_!~/^rolesdef\&/) {
829: my ($area,$role)=split(/=/,$_);
830: $area=~s/\_\w\w$//;
831: my ($trole,$tend,$tstart)=split(/_/,$role);
832: $userroles.='user.role.'.$trole.'.'.$area.'='.
833: $tstart.'.'.$tend."\n";
834: if ($tend!=0) {
835: if ($tend<$now) {
836: $trole='';
837: }
838: }
839: if ($tstart!=0) {
840: if ($tstart>$now) {
841: $trole='';
842: }
843: }
844: if (($area ne '') && ($trole ne '')) {
845: my $spec=$trole.'.'.$area;
846: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
847: if ($trole =~ /^cr\//) {
848: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
849: my $homsvr=homeserver($rauthor,$rdomain);
850: if ($hostname{$homsvr} ne '') {
851: my $roledef=
852: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
853: $homsvr);
854: if (($roledef ne 'con_lost') && ($roledef ne '')) {
855: my ($syspriv,$dompriv,$coursepriv)=
856: split(/\_/,unescape($roledef));
857: $allroles{'cm./'}.=':'.$syspriv;
858: $allroles{$spec.'./'}.=':'.$syspriv;
859: if ($tdomain ne '') {
860: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
861: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
862: if ($trest ne '') {
863: $allroles{'cm.'.$area}.=':'.$coursepriv;
864: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
865: }
866: }
867: }
868: }
869: } else {
870: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
871: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
872: if ($tdomain ne '') {
873: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
874: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
875: if ($trest ne '') {
876: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
877: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
878: }
879: }
880: }
881: }
882: }
883: } split(/&/,$rolesdump);
884: map {
885: %thesepriv=();
886: map {
887: if ($_ ne '') {
888: my ($privilege,$restrictions)=split(/&/,$_);
889: if ($restrictions eq '') {
890: $thesepriv{$privilege}='F';
891: } else {
892: if ($thesepriv{$privilege} ne 'F') {
893: $thesepriv{$privilege}.=$restrictions;
894: }
895: }
896: }
897: } split(/:/,$allroles{$_});
898: $thesestr='';
899: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
900: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
901: } keys %allroles;
902: }
903: return $userroles;
904: }
905:
906: # --------------------------------------------------------------- get interface
907:
908: sub get {
909: my ($namespace,@storearr)=@_;
910: my $items='';
911: map {
912: $items.=escape($_).'&';
913: } @storearr;
914: $items=~s/\&$//;
915: my $rep=reply("get:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
916: $ENV{'user.home'});
917: my @pairs=split(/\&/,$rep);
918: my %returnhash=();
919: my $i=0;
920: map {
921: $returnhash{$_}=unescape($pairs[$i]);
922: $i++;
923: } @storearr;
924: return %returnhash;
925: }
926:
927: # --------------------------------------------------------------- del interface
928:
929: sub del {
930: my ($namespace,@storearr)=@_;
931: my $items='';
932: map {
933: $items.=escape($_).'&';
934: } @storearr;
935: $items=~s/\&$//;
936: return reply("del:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
937: $ENV{'user.home'});
938: }
939:
940: # -------------------------------------------------------------- dump interface
941:
942: sub dump {
943: my $namespace=shift;
944: my $rep=reply("dump:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace",
945: $ENV{'user.home'});
946: my @pairs=split(/\&/,$rep);
947: my %returnhash=();
948: map {
949: my ($key,$value)=split(/=/,$_);
950: $returnhash{unescape($key)}=unescape($value);
951: } @pairs;
952: return %returnhash;
953: }
954:
955: # --------------------------------------------------------------- put interface
956:
957: sub put {
958: my ($namespace,%storehash)=@_;
959: my $items='';
960: map {
961: $items.=escape($_).'='.escape($storehash{$_}).'&';
962: } keys %storehash;
963: $items=~s/\&$//;
964: return reply("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
965: $ENV{'user.home'});
966: }
967:
968: # ------------------------------------------------------ critical put interface
969:
970: sub cput {
971: my ($namespace,%storehash)=@_;
972: my $items='';
973: map {
974: $items.=escape($_).'='.escape($storehash{$_}).'&';
975: } keys %storehash;
976: $items=~s/\&$//;
977: return critical
978: ("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
979: $ENV{'user.home'});
980: }
981:
982: # -------------------------------------------------------------- eget interface
983:
984: sub eget {
985: my ($namespace,@storearr)=@_;
986: my $items='';
987: map {
988: $items.=escape($_).'&';
989: } @storearr;
990: $items=~s/\&$//;
991: my $rep=reply("eget:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
992: $ENV{'user.home'});
993: my @pairs=split(/\&/,$rep);
994: my %returnhash=();
995: my $i=0;
996: map {
997: $returnhash{$_}=unescape($pairs[$i]);
998: $i++;
999: } @storearr;
1000: return %returnhash;
1001: }
1002:
1003: # ------------------------------------------------- Check for a user privilege
1004:
1005: sub allowed {
1006: my ($priv,$uri)=@_;
1007: $uri=&declutter($uri);
1008:
1009: # Free bre access to adm and meta resources
1010:
1011: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1012: return 'F';
1013: }
1014:
1015: my $thisallowed='';
1016: my $statecond=0;
1017: my $courseprivid='';
1018:
1019: # Course
1020:
1021: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1022: $thisallowed.=$1;
1023: }
1024:
1025: # Domain
1026:
1027: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1028: =~/$priv\&([^\:]*)/) {
1029: $thisallowed.=$1;
1030: }
1031:
1032: # Course: uri itself is a course
1033: my $courseuri=$uri;
1034: $courseuri=~s/\_(\d)/\/$1/;
1035: $courseuri=~s/^([^\/])/\/$1/;
1036:
1037: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1038: =~/$priv\&([^\:]*)/) {
1039: $thisallowed.=$1;
1040: }
1041:
1042: # Full access at system, domain or course-wide level? Exit.
1043:
1044: if ($thisallowed=~/F/) {
1045: return 'F';
1046: }
1047:
1048: # If this is generating or modifying users, exit with special codes
1049:
1050: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:'=~/\:$priv\:/) {
1051: return $thisallowed;
1052: }
1053: #
1054: # Gathered so far: system, domain and course wide privileges
1055: #
1056: # Course: See if uri or referer is an individual resource that is part of
1057: # the course
1058:
1059: if ($ENV{'request.course.id'}) {
1060: $courseprivid=$ENV{'request.course.id'};
1061: if ($ENV{'request.course.sec'}) {
1062: $courseprivid.='/'.$ENV{'request.course.sec'};
1063: }
1064: $courseprivid=~s/\_/\//;
1065: my $checkreferer=1;
1066: my @uriparts=split(/\//,$uri);
1067: my $filename=$uriparts[$#uriparts];
1068: my $pathname=$uri;
1069: $pathname=~s/\/$filename$//;
1070: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1071: /\&$filename\:([\d\|]+)\&/) {
1072: $statecond=$1;
1073: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1074: =~/$priv\&([^\:]*)/) {
1075: $thisallowed.=$1;
1076: $checkreferer=0;
1077: }
1078: }
1079:
1080: if (($ENV{'HTTP_REFERER'}) && ($checkreferer)) {
1081: my $refuri=$ENV{'HTTP_REFERER'};
1082: $refuri=~s/^http\:\/\/$ENV{'request.host'}//i;
1083: $refuri=&declutter($refuri);
1084: my @uriparts=split(/\//,$refuri);
1085: my $filename=$uriparts[$#uriparts];
1086: my $pathname=$refuri;
1087: $pathname=~s/\/$filename$//;
1088: my @filenameparts=split(/\./,$uri);
1089: if (&fileembstyle($filenameparts[$#filenameparts]) ne 'ssi') {
1090: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1091: /\&$filename\:([\d\|]+)\&/) {
1092: my $refstatecond=$1;
1093: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1094: =~/$priv\&([^\:]*)/) {
1095: $thisallowed.=$1;
1096: $uri=$refuri;
1097: $statecond=$refstatecond;
1098: }
1099: }
1100: }
1101: }
1102: }
1103:
1104: #
1105: # Gathered now: all privileges that could apply, and condition number
1106: #
1107: #
1108: # Full or no access?
1109: #
1110:
1111: if ($thisallowed=~/F/) {
1112: return 'F';
1113: }
1114:
1115: unless ($thisallowed) {
1116: return '';
1117: }
1118:
1119: # Restrictions exist, deal with them
1120: #
1121: # C:according to course preferences
1122: # R:according to resource settings
1123: # L:unless locked
1124: # X:according to user session state
1125: #
1126:
1127: # Possibly locked functionality, check all courses
1128: # Locks might take effect only after 10 minutes cache expiration for other
1129: # courses, and 2 minutes for current course
1130:
1131: my $envkey;
1132: if ($thisallowed=~/L/) {
1133: foreach $envkey (keys %ENV) {
1134: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1135: my $courseid=$2;
1136: my $roleid=$1.'.'.$2;
1137: $courseid=~s/^\///;
1138: my $expiretime=600;
1139: if ($ENV{'request.role'} eq $roleid) {
1140: $expiretime=120;
1141: }
1142: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1143: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1144: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1145: &coursedescription($courseid);
1146: }
1147: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1148: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1149: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1150: &log($ENV{'user.domain'},$ENV{'user.name'},
1151: $ENV{'user.host'},
1152: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1153: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1154: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1155: return '';
1156: }
1157: }
1158: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1159: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1160: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1161: &log($ENV{'user.domain'},$ENV{'user.name'},
1162: $ENV{'user.host'},
1163: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1164: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1165: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1166: return '';
1167: }
1168: }
1169: }
1170: }
1171: }
1172:
1173: #
1174: # Rest of the restrictions depend on selected course
1175: #
1176:
1177: unless ($ENV{'request.course.id'}) {
1178: return '1';
1179: }
1180:
1181: #
1182: # Now user is definitely in a course
1183: #
1184:
1185:
1186: # Course preferences
1187:
1188: if ($thisallowed=~/C/) {
1189: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1190: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1191: =~/\,$rolecode\,/) {
1192: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1193: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1194: $ENV{'request.course.id'});
1195: return '';
1196: }
1197: }
1198:
1199: # Resource preferences
1200:
1201: if ($thisallowed=~/R/) {
1202: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1203: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1204: if (-e $filename) {
1205: my @content;
1206: {
1207: my $fh=Apache::File->new($filename);
1208: @content=<$fh>;
1209: }
1210: if (join('',@content)=~
1211: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1212: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1213: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1214: return '';
1215:
1216: }
1217: }
1218: }
1219:
1220: # Restricted by state?
1221:
1222: if ($thisallowed=~/X/) {
1223: if (&condval($statecond)) {
1224: return '2';
1225: } else {
1226: return '';
1227: }
1228: }
1229:
1230: return 'F';
1231: }
1232:
1233: # ----------------------------------------------------------------- Define Role
1234:
1235: sub definerole {
1236: if (allowed('mcr','/')) {
1237: my ($rolename,$sysrole,$domrole,$courole)=@_;
1238: map {
1239: my ($crole,$cqual)=split(/\&/,$_);
1240: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1241: if ($pr{'cr:s'}=~/$crole\&/) {
1242: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1243: return "refused:s:$crole&$cqual";
1244: }
1245: }
1246: } split('/',$sysrole);
1247: map {
1248: my ($crole,$cqual)=split(/\&/,$_);
1249: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1250: if ($pr{'cr:d'}=~/$crole\&/) {
1251: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1252: return "refused:d:$crole&$cqual";
1253: }
1254: }
1255: } split('/',$domrole);
1256: map {
1257: my ($crole,$cqual)=split(/\&/,$_);
1258: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1259: if ($pr{'cr:c'}=~/$crole\&/) {
1260: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1261: return "refused:c:$crole&$cqual";
1262: }
1263: }
1264: } split('/',$courole);
1265: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1266: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1267: "rolesdef_$rolename=".
1268: escape($sysrole.'_'.$domrole.'_'.$courole);
1269: return reply($command,$ENV{'user.home'});
1270: } else {
1271: return 'refused';
1272: }
1273: }
1274:
1275: # ---------------- Make a metadata query against the network of library servers
1276:
1277: sub metadata_query {
1278: my ($query,$custom,$customshow)=@_;
1279: # need to put in a library server loop here and return a hash
1280: my %rhash;
1281: for my $server (keys %libserv) {
1282: unless ($custom or $customshow) {
1283: my $reply=&reply("querysend:".&escape($query),$server);
1284: $rhash{$server}=$reply;
1285: }
1286: else {
1287: my $reply=&reply("querysend:".&escape($query).':'.
1288: &escape($custom).':'.&escape($customshow),
1289: $server);
1290: $rhash{$server}=$reply;
1291: }
1292: }
1293: return \%rhash;
1294: }
1295:
1296: # ------------------------------------------------------------------ Plain Text
1297:
1298: sub plaintext {
1299: my $short=shift;
1300: return $prp{$short};
1301: }
1302:
1303: # ------------------------------------------------------------------ Plain Text
1304:
1305: sub fileembstyle {
1306: my $ending=shift;
1307: return $fe{$ending};
1308: }
1309:
1310: # ------------------------------------------------------------ Description Text
1311:
1312: sub filedescription {
1313: my $ending=shift;
1314: return $fd{$ending};
1315: }
1316:
1317: # ----------------------------------------------------------------- Assign Role
1318:
1319: sub assignrole {
1320: my ($udom,$uname,$url,$role,$end,$start)=@_;
1321: my $mrole;
1322: if ($role =~ /^cr\//) {
1323: unless (&allowed('ccr',$url)) {
1324: &logthis('Refused custom assignrole: '.
1325: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1326: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1327: return 'refused';
1328: }
1329: $mrole='cr';
1330: } else {
1331: my $cwosec=$url;
1332: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1333: unless (&allowed('c'.$role,$cwosec)) {
1334: &logthis('Refused assignrole: '.
1335: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1336: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1337: return 'refused';
1338: }
1339: $mrole=$role;
1340: }
1341: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1342: "$udom:$uname:$url".'_'."$mrole=$role";
1343: if ($end) { $command.='_'.$end; }
1344: if ($start) {
1345: if ($end) {
1346: $command.='_'.$start;
1347: } else {
1348: $command.='_0_'.$start;
1349: }
1350: }
1351: return &reply($command,&homeserver($uname,$udom));
1352: }
1353:
1354: # --------------------------------------------------------------- Modify a user
1355:
1356:
1357: sub modifyuser {
1358: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1359: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1360: $umode.', '.$first.', '.$middle.', '.
1361: $last.', '.$gene.' by '.
1362: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1363: my $uhome=&homeserver($uname,$udom);
1364: # ----------------------------------------------------------------- Create User
1365: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1366: my $unhome='';
1367: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1368: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1369: } else {
1370: my $tryserver;
1371: my $loadm=10000000;
1372: foreach $tryserver (keys %libserv) {
1373: if ($hostdom{$tryserver} eq $udom) {
1374: my $answer=reply('load',$tryserver);
1375: if (($answer=~/\d+/) && ($answer<$loadm)) {
1376: $loadm=$answer;
1377: $unhome=$tryserver;
1378: }
1379: }
1380: }
1381: }
1382: if (($unhome eq '') || ($unhome eq 'no_host')) {
1383: return 'error: find home';
1384: }
1385: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1386: &escape($upass),$unhome);
1387: unless ($reply eq 'ok') {
1388: return 'error: '.$reply;
1389: }
1390: $uhome=&homeserver($uname,$udom);
1391: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1392: return 'error: verify home';
1393: }
1394: }
1395: # ---------------------------------------------------------------------- Add ID
1396: if ($uid) {
1397: $uid=~tr/A-Z/a-z/;
1398: my %uidhash=&idrget($udom,$uname);
1399: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1400: unless ($uid eq $uidhash{$uname}) {
1401: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1402: }
1403: } else {
1404: &idput($udom,($uname => $uid));
1405: }
1406: }
1407: # -------------------------------------------------------------- Add names, etc
1408: my $names=&reply('get:'.$udom.':'.$uname.
1409: ':environment:firstname&middlename&lastname&generation',
1410: $uhome);
1411: my ($efirst,$emiddle,$elast,$egene)=split(/\&/,$names);
1412: if ($first) { $efirst = &escape($first); }
1413: if ($middle) { $emiddle = &escape($middle); }
1414: if ($last) { $elast = &escape($last); }
1415: if ($gene) { $egene = &escape($gene); }
1416: my $reply=&reply('put:'.$udom.':'.$uname.
1417: ':environment:firstname='.$efirst.
1418: '&middlename='.$emiddle.
1419: '&lastname='.$elast.
1420: '&generation='.$egene,$uhome);
1421: if ($reply ne 'ok') {
1422: return 'error: '.$reply;
1423: }
1424: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1425: $umode.', '.$first.', '.$middle.', '.
1426: $last.', '.$gene.' by '.
1427: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1428: return 'ok';
1429: }
1430:
1431: # -------------------------------------------------------------- Modify student
1432:
1433: sub modifystudent {
1434: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1435: $end,$start)=@_;
1436: my $cid='';
1437: unless ($cid=$ENV{'request.course.id'}) {
1438: return 'not_in_class';
1439: }
1440: # --------------------------------------------------------------- Make the user
1441: my $reply=&modifyuser
1442: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1443: unless ($reply eq 'ok') { return $reply; }
1444: my $uhome=&homeserver($uname,$udom);
1445: if (($uhome eq '') || ($uhome eq 'no_host')) {
1446: return 'error: no such user';
1447: }
1448: # -------------------------------------------------- Add student to course list
1449: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1450: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1451: &escape($uname.':'.$udom).'='.
1452: &escape($end.':'.$start),
1453: $ENV{'course.'.$cid.'.home'});
1454: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1455: return 'error: '.$reply;
1456: }
1457: # ---------------------------------------------------- Add student role to user
1458: my $uurl='/'.$cid;
1459: $uurl=~s/\_/\//g;
1460: if ($usec) {
1461: $uurl.='/'.$usec;
1462: }
1463: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1464: }
1465:
1466: # ------------------------------------------------- Write to course preferences
1467:
1468: sub writecoursepref {
1469: my ($courseid,%prefs)=@_;
1470: $courseid=~s/^\///;
1471: $courseid=~s/\_/\//g;
1472: my ($cdomain,$cnum)=split(/\//,$courseid);
1473: my $chome=homeserver($cnum,$cdomain);
1474: if (($chome eq '') || ($chome eq 'no_host')) {
1475: return 'error: no such course';
1476: }
1477: my $cstring='';
1478: map {
1479: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1480: } keys %prefs;
1481: $cstring=~s/\&$//;
1482: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1483: }
1484:
1485: # ---------------------------------------------------------- Make/modify course
1486:
1487: sub createcourse {
1488: my ($udom,$description,$url)=@_;
1489: $url=&declutter($url);
1490: my $cid='';
1491: unless (&allowed('ccc',$ENV{'user.domain'})) {
1492: return 'refused';
1493: }
1494: unless ($udom eq $ENV{'user.domain'}) {
1495: return 'refused';
1496: }
1497: # ------------------------------------------------------------------- Create ID
1498: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1499: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1500: # ----------------------------------------------- Make sure that does not exist
1501: my $uhome=&homeserver($uname,$udom);
1502: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1503: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1504: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1505: $uhome=&homeserver($uname,$udom);
1506: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1507: return 'error: unable to generate unique course-ID';
1508: }
1509: }
1510: # ------------------------------------------------------------- Make the course
1511: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1512: $ENV{'user.home'});
1513: unless ($reply eq 'ok') { return 'error: '.$reply; }
1514: my $uhome=&homeserver($uname,$udom);
1515: if (($uhome eq '') || ($uhome eq 'no_host')) {
1516: return 'error: no such course';
1517: }
1518: &writecoursepref($udom.'_'.$uname,
1519: ('description' => $description,
1520: 'url' => $url));
1521: return '/'.$udom.'/'.$uname;
1522: }
1523:
1524: # ---------------------------------------------------------- Assign Custom Role
1525:
1526: sub assigncustomrole {
1527: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1528: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1529: $end,$start);
1530: }
1531:
1532: # ----------------------------------------------------------------- Revoke Role
1533:
1534: sub revokerole {
1535: my ($udom,$uname,$url,$role)=@_;
1536: my $now=time;
1537: return &assignrole($udom,$uname,$url,$role,$now);
1538: }
1539:
1540: # ---------------------------------------------------------- Revoke Custom Role
1541:
1542: sub revokecustomrole {
1543: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1544: my $now=time;
1545: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1546: }
1547:
1548: # ------------------------------------------------------------ Directory lister
1549:
1550: sub dirlist {
1551: my $uri=shift;
1552: $uri=~s/^\///;
1553: $uri=~s/\/$//;
1554: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1555: if ($udom) {
1556: if ($uname) {
1557: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1558: homeserver($uname,$udom));
1559: return split(/:/,$listing);
1560: } else {
1561: my $tryserver;
1562: my %allusers=();
1563: foreach $tryserver (keys %libserv) {
1564: if ($hostdom{$tryserver} eq $udom) {
1565: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1566: $tryserver);
1567: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1568: && ($listing ne 'con_lost')) {
1569: map {
1570: my ($entry,@stat)=split(/&/,$_);
1571: $allusers{$entry}=1;
1572: } split(/:/,$listing);
1573: }
1574: }
1575: }
1576: my $alluserstr='';
1577: map {
1578: $alluserstr.=$_.'&user:';
1579: } sort keys %allusers;
1580: $alluserstr=~s/:$//;
1581: return split(/:/,$alluserstr);
1582: }
1583: } else {
1584: my $tryserver;
1585: my %alldom=();
1586: foreach $tryserver (keys %libserv) {
1587: $alldom{$hostdom{$tryserver}}=1;
1588: }
1589: my $alldomstr='';
1590: map {
1591: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1592: } sort keys %alldom;
1593: $alldomstr=~s/:$//;
1594: return split(/:/,$alldomstr);
1595: }
1596: }
1597:
1598: # -------------------------------------------------------- Value of a Condition
1599:
1600: sub directcondval {
1601: my $number=shift;
1602: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1603: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1604: } else {
1605: return 2;
1606: }
1607: }
1608:
1609: sub condval {
1610: my $condidx=shift;
1611: my $result=0;
1612: my $allpathcond='';
1613: map {
1614: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
1615: $allpathcond.=
1616: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
1617: }
1618: } split(/\|/,$condidx);
1619: $allpathcond=~s/\|$//;
1620: if ($ENV{'request.course.id'}) {
1621: if ($allpathcond) {
1622: my $operand='|';
1623: my @stack;
1624: map {
1625: if ($_ eq '(') {
1626: push @stack,($operand,$result)
1627: } elsif ($_ eq ')') {
1628: my $before=pop @stack;
1629: if (pop @stack eq '&') {
1630: $result=$result>$before?$before:$result;
1631: } else {
1632: $result=$result>$before?$result:$before;
1633: }
1634: } elsif (($_ eq '&') || ($_ eq '|')) {
1635: $operand=$_;
1636: } else {
1637: my $new=directcondval($_);
1638: if ($operand eq '&') {
1639: $result=$result>$new?$new:$result;
1640: } else {
1641: $result=$result>$new?$result:$new;
1642: }
1643: }
1644: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
1645: }
1646: }
1647: return $result;
1648: }
1649:
1650: # --------------------------------------------------------- Value of a Variable
1651:
1652: sub EXT {
1653: my $varname=shift;
1654: unless ($varname) { return ''; }
1655: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
1656: my $rest;
1657: if ($therest[0]) {
1658: $rest=join('.',@therest);
1659: } else {
1660: $rest='';
1661: }
1662: my $qualifierrest=$qualifier;
1663: if ($rest) { $qualifierrest.='.'.$rest; }
1664: my $spacequalifierrest=$space;
1665: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1666: if ($realm eq 'user') {
1667: # --------------------------------------------------------------- user.resource
1668: if ($space eq 'resource') {
1669: my %restored=&restore();
1670: return $restored{$qualifierrest};
1671: # ----------------------------------------------------------------- user.access
1672: } elsif ($space eq 'access') {
1673: return &allowed($qualifier,$rest);
1674: # ------------------------------------------ user.preferences, user.environment
1675: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1676: return $ENV{join('.',('environment',$qualifierrest))};
1677: # ----------------------------------------------------------------- user.course
1678: } elsif ($space eq 'course') {
1679: return $ENV{join('.',('request.course',$qualifier))};
1680: # ------------------------------------------------------------------- user.role
1681: } elsif ($space eq 'role') {
1682: my ($role,$where)=split(/\./,$ENV{'request.role'});
1683: if ($qualifier eq 'value') {
1684: return $role;
1685: } elsif ($qualifier eq 'extent') {
1686: return $where;
1687: }
1688: # ----------------------------------------------------------------- user.domain
1689: } elsif ($space eq 'domain') {
1690: return $ENV{'user.domain'};
1691: # ------------------------------------------------------------------- user.name
1692: } elsif ($space eq 'name') {
1693: return $ENV{'user.name'};
1694: # ---------------------------------------------------- Any other user namespace
1695: } else {
1696: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
1697: my %reply=&get($space,$item);
1698: return $reply{$item};
1699: }
1700: } elsif ($realm eq 'request') {
1701: # ------------------------------------------------------------- request.browser
1702: if ($space eq 'browser') {
1703: return $ENV{'browser.'.$qualifier};
1704: # ------------------------------------------------------------ request.filename
1705: } else {
1706: return $ENV{'request.'.$spacequalifierrest};
1707: }
1708: } elsif ($realm eq 'course') {
1709: # ---------------------------------------------------------- course.description
1710: my $section='';
1711: if ($ENV{'request.course.sec'}) {
1712: $section='_'.$ENV{'request.course.sec'};
1713: }
1714: return $ENV{'course.'.$ENV{'request.course.id'}.$section.'.'.
1715: $spacequalifierrest};
1716: } elsif ($realm eq 'resource') {
1717: if ($ENV{'request.course.id'}) {
1718: # ----------------------------------------------------- Cascading lookup scheme
1719: my $symbp=&symbread();
1720: my $mapp=(split(/\_\_\_/,$symbp))[0];
1721:
1722: my $symbparm=$symbp.'.'.$spacequalifierrest;
1723: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
1724:
1725: my $seclevel=
1726: $ENV{'request.course.id'}.'.['.
1727: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
1728: my $seclevelr=
1729: $ENV{'request.course.id'}.'.['.
1730: $ENV{'request.course.sec'}.'].'.$symbparm;
1731: my $seclevelm=
1732: $ENV{'request.course.id'}.'.['.
1733: $ENV{'request.course.sec'}.'].'.$mapparm;
1734:
1735: my $courselevel=
1736: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
1737: my $courselevelr=
1738: $ENV{'request.course.id'}.'.'.$symbparm;
1739: my $courselevelm=
1740: $ENV{'request.course.id'}.'.'.$mapparm;
1741:
1742: # ----------------------------------------------------------- first, check user
1743: my %resourcedata=get('resourcedata',
1744: ($courselevelr,$courselevelm,$courselevel));
1745: if (($resourcedata{$courselevelr}!~/^error\:/) &&
1746: ($resourcedata{$courselevelr}!~/^con_lost/)) {
1747:
1748: if ($resourcedata{$courselevelr}) {
1749: return $resourcedata{$courselevelr}; }
1750: if ($resourcedata{$courselevelm}) {
1751: return $resourcedata{$courselevelm}; }
1752: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
1753:
1754: } else {
1755: if ($resourcedata{$courselevelr}!~/No such file/) {
1756: &logthis("<font color=blue>WARNING:".
1757: " Trying to get resource data for ".$ENV{'user.name'}." at "
1758: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
1759: "</font>");
1760: }
1761: }
1762:
1763: # -------------------------------------------------------- second, check course
1764:
1765: my $reply=&reply('get:'.
1766: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
1767: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1768: ':resourcedata:'.
1769: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
1770: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
1771: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
1772: if ($reply!~/^error\:/) {
1773: map {
1774: if ($_) { return &unescape($_); }
1775: } split(/\&/,$reply);
1776: }
1777: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
1778: &logthis("<font color=blue>WARNING:".
1779: " Getting ".$reply." asking for ".$varname." for ".
1780: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1781: ' at '.
1782: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
1783: ' from '.
1784: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
1785: "</font>");
1786: }
1787: # ------------------------------------------------------ third, check map parms
1788: my %parmhash=();
1789: my $thisparm='';
1790: if (tie(%parmhash,'GDBM_File',
1791: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
1792: $thisparm=$parmhash{$symbparm};
1793: untie(%parmhash);
1794: }
1795: if ($thisparm) { return $thisparm; }
1796: }
1797:
1798: # --------------------------------------------- last, look in resource metadata
1799:
1800: $spacequalifierrest=~s/\./\_/;
1801: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
1802: if ($metadata) { return $metadata; }
1803: $metadata=&metadata($ENV{'request.filename'},
1804: 'parameter_'.$spacequalifierrest);
1805: if ($metadata) { return $metadata; }
1806:
1807: # ---------------------------------------------------- Any other user namespace
1808: } elsif ($realm eq 'environment') {
1809: # ----------------------------------------------------------------- environment
1810: return $ENV{$spacequalifierrest};
1811: } elsif ($realm eq 'system') {
1812: # ----------------------------------------------------------------- system.time
1813: if ($space eq 'time') {
1814: return time;
1815: }
1816: }
1817: return '';
1818: }
1819:
1820: # ---------------------------------------------------------------- Get metadata
1821:
1822: sub metadata {
1823: my ($uri,$what)=@_;
1824:
1825: $uri=&declutter($uri);
1826: my $filename=$uri;
1827: $uri=~s/\.meta$//;
1828: unless ($metacache{$uri.':keys'}) {
1829: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
1830: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
1831: my $parser=HTML::TokeParser->new(\$metastring);
1832: my $token;
1833: while ($token=$parser->get_token) {
1834: if ($token->[0] eq 'S') {
1835: my $entry=$token->[1];
1836: my $unikey=$entry;
1837: if (defined($token->[2]->{'part'})) {
1838: $unikey.='_'.$token->[2]->{'part'};
1839: }
1840: if (defined($token->[2]->{'name'})) {
1841: $unikey.='_'.$token->[2]->{'name'};
1842: }
1843: if ($metacache{$uri.':keys'}) {
1844: $metacache{$uri.':keys'}.=','.$unikey;
1845: } else {
1846: $metacache{$uri.':keys'}=$unikey;
1847: }
1848: map {
1849: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
1850: } @{$token->[3]};
1851: unless (
1852: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
1853: ) { $metacache{$uri.':'.$unikey}=
1854: $metacache{$uri.':'.$unikey.'.default'};
1855: }
1856: }
1857: }
1858: }
1859: return $metacache{$uri.':'.$what};
1860: }
1861:
1862: # ------------------------------------------------- Update symbolic store links
1863:
1864: sub symblist {
1865: my ($mapname,%newhash)=@_;
1866: $mapname=declutter($mapname);
1867: my %hash;
1868: if (($ENV{'request.course.fn'}) && (%newhash)) {
1869: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1870: &GDBM_WRCREAT,0640)) {
1871: map {
1872: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
1873: } keys %newhash;
1874: if (untie(%hash)) {
1875: return 'ok';
1876: }
1877: }
1878: }
1879: return 'error';
1880: }
1881:
1882: # ------------------------------------------------------ Return symb list entry
1883:
1884: sub symbread {
1885: my $thisfn=shift;
1886: unless ($thisfn) {
1887: $thisfn=$ENV{'request.filename'};
1888: }
1889: $thisfn=declutter($thisfn);
1890: my %hash;
1891: my %bighash;
1892: my $syval='';
1893: if (($ENV{'request.course.fn'}) && ($thisfn)) {
1894: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1895: &GDBM_READER,0640)) {
1896: $syval=$hash{$thisfn};
1897: untie(%hash);
1898: }
1899: # ---------------------------------------------------------- There was an entry
1900: if ($syval) {
1901: unless ($syval=~/\_\d+$/) {
1902: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
1903: &appenv('request.ambiguous' => $thisfn);
1904: return '';
1905: }
1906: $syval.=$1;
1907: }
1908: } else {
1909: # ------------------------------------------------------- Was not in symb table
1910: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1911: &GDBM_READER,0640)) {
1912: # ---------------------------------------------- Get ID(s) for current resource
1913: my $ids=$bighash{'ids_/res/'.$thisfn};
1914: unless ($ids) {
1915: $ids=$bighash{'ids_/'.$thisfn};
1916: }
1917: if ($ids) {
1918: # ------------------------------------------------------------------- Has ID(s)
1919: my @possibilities=split(/\,/,$ids);
1920: if ($#possibilities==0) {
1921: # ----------------------------------------------- There is only one possibility
1922: my ($mapid,$resid)=split(/\./,$ids);
1923: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
1924: } else {
1925: # ------------------------------------------ There is more than one possibility
1926: my $realpossible=0;
1927: map {
1928: my $file=$bighash{'src_'.$_};
1929: if (&allowed('bre',$file)) {
1930: my ($mapid,$resid)=split(/\./,$_);
1931: if ($bighash{'map_type_'.$mapid} ne 'page') {
1932: $realpossible++;
1933: $syval=declutter($bighash{'map_id_'.$mapid}).
1934: '___'.$resid;
1935: }
1936: }
1937: } @possibilities;
1938: if ($realpossible!=1) { $syval=''; }
1939: }
1940: }
1941: untie(%bighash)
1942: }
1943: }
1944: if ($syval) {
1945: return $syval.'___'.$thisfn;
1946: }
1947: }
1948: &appenv('request.ambiguous' => $thisfn);
1949: return '';
1950: }
1951:
1952: # ---------------------------------------------------------- Return random seed
1953:
1954: sub numval {
1955: my $txt=shift;
1956: $txt=~tr/A-J/0-9/;
1957: $txt=~tr/a-j/0-9/;
1958: $txt=~tr/K-T/0-9/;
1959: $txt=~tr/k-t/0-9/;
1960: $txt=~tr/U-Z/0-5/;
1961: $txt=~tr/u-z/0-5/;
1962: $txt=~s/\D//g;
1963: return int($txt);
1964: }
1965:
1966: sub rndseed {
1967: my $symb;
1968: unless ($symb=&symbread()) { return time; }
1969: {
1970: use integer;
1971: my $symbchck=unpack("%32C*",$symb) << 27;
1972: my $symbseed=numval($symb) << 22;
1973: my $namechck=unpack("%32C*",$ENV{'user.name'}) << 17;
1974: my $nameseed=numval($ENV{'user.name'}) << 12;
1975: my $domainseed=unpack("%32C*",$ENV{'user.domain'}) << 7;
1976: my $courseseed=unpack("%32C*",$ENV{'request.course.id'});
1977: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
1978: #uncommenting these lines can break things!
1979: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
1980: #&Apache::lonxml::debug("rndseed :$num:$symb");
1981: return $num;
1982: }
1983: }
1984:
1985: sub ireceipt {
1986: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
1987: my $cuname=unpack("%32C*",$funame);
1988: my $cudom=unpack("%32C*",$fudom);
1989: my $cucourseid=unpack("%32C*",$fucourseid);
1990: my $cusymb=unpack("%32C*",$fusymb);
1991: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
1992: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
1993: ($cunique%$cuname+
1994: $cunique%$cudom+
1995: $cusymb%$cuname+
1996: $cusymb%$cudom+
1997: $cucourseid%$cuname+
1998: $cucourseid%$cudom);
1999: }
2000:
2001: sub receipt {
2002: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2003: $ENV{'request.course.id'},&symbread());
2004: }
2005:
2006: # ------------------------------------------------------------ Serves up a file
2007: # returns either the contents of the file or a -1
2008: sub getfile {
2009: my $file=shift;
2010: &repcopy($file);
2011: if (! -e $file ) { return -1; };
2012: my $fh=Apache::File->new($file);
2013: my $a='';
2014: while (<$fh>) { $a .=$_; }
2015: return $a
2016: }
2017:
2018: sub filelocation {
2019: my ($dir,$file) = @_;
2020: my $location;
2021: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2022: if ($file=~m:^/~:) { # is a contruction space reference
2023: $location = $file;
2024: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2025: } else {
2026: $file=~s/^$perlvar{'lonDocRoot'}//;
2027: $file=~s:^/*res::;
2028: if ( !( $file =~ m:^/:) ) {
2029: $location = $dir. '/'.$file;
2030: } else {
2031: $location = '/home/httpd/html/res'.$file;
2032: }
2033: }
2034: $location=~s://+:/:g; # remove duplicate /
2035: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2036: return $location;
2037: }
2038:
2039: sub hreflocation {
2040: my ($dir,$file)=@_;
2041: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
2042: my $finalpath=filelocation($dir,$file);
2043: $finalpath=~s/^\/home\/httpd\/html//;
2044: return $finalpath;
2045: } else {
2046: return $file;
2047: }
2048: }
2049:
2050: # ------------------------------------------------------------- Declutters URLs
2051:
2052: sub declutter {
2053: my $thisfn=shift;
2054: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2055: $thisfn=~s/^\///;
2056: $thisfn=~s/^res\///;
2057: return $thisfn;
2058: }
2059:
2060: # -------------------------------------------------------- Escape Special Chars
2061:
2062: sub escape {
2063: my $str=shift;
2064: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2065: return $str;
2066: }
2067:
2068: # ----------------------------------------------------- Un-Escape Special Chars
2069:
2070: sub unescape {
2071: my $str=shift;
2072: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2073: return $str;
2074: }
2075:
2076: # ================================================================ Main Program
2077:
2078: sub BEGIN {
2079: if ($readit ne 'done') {
2080: # ------------------------------------------------------------ Read access.conf
2081: {
2082: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2083:
2084: while (my $configline=<$config>) {
2085: if ($configline =~ /PerlSetVar/) {
2086: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2087: chomp($varvalue);
2088: $perlvar{$varname}=$varvalue;
2089: }
2090: }
2091: }
2092:
2093: # ------------------------------------------------------------- Read hosts file
2094: {
2095: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2096:
2097: while (my $configline=<$config>) {
2098: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2099: $hostname{$id}=$name;
2100: $hostdom{$id}=$domain;
2101: if ($role eq 'library') { $libserv{$id}=$name; }
2102: }
2103: }
2104:
2105: # ------------------------------------------------------ Read spare server file
2106: {
2107: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2108:
2109: while (my $configline=<$config>) {
2110: chomp($configline);
2111: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2112: $spareid{$configline}=1;
2113: }
2114: }
2115: }
2116: # ------------------------------------------------------------ Read permissions
2117: {
2118: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2119:
2120: while (my $configline=<$config>) {
2121: chomp($configline);
2122: my ($role,$perm)=split(/ /,$configline);
2123: if ($perm ne '') { $pr{$role}=$perm; }
2124: }
2125: }
2126:
2127: # -------------------------------------------- Read plain texts for permissions
2128: {
2129: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2130:
2131: while (my $configline=<$config>) {
2132: chomp($configline);
2133: my ($short,$plain)=split(/:/,$configline);
2134: if ($plain ne '') { $prp{$short}=$plain; }
2135: }
2136: }
2137:
2138: # ------------------------------------------------------------- Read file types
2139: {
2140: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2141:
2142: while (my $configline=<$config>) {
2143: chomp($configline);
2144: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2145: if ($descr[0] ne '') {
2146: $fe{$ending}=$emb;
2147: $fd{$ending}=join(' ',@descr);
2148: }
2149: }
2150: }
2151:
2152: %metacache=();
2153:
2154: $readit='done';
2155: &logthis('<font color=yellow>INFO: Read configuration</font>');
2156: }
2157: }
2158: 1;
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