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: # 5/26,5/28 Gerd Kortemeyer
107: # 5/30 H. K. Ng
108: # 6/1 Gerd Kortemeyer
109: #
110:
111: package Apache::lonnet;
112:
113: use strict;
114: use Apache::File;
115: use LWP::UserAgent();
116: use HTTP::Headers;
117: use vars
118: qw(%perlvar %hostname %homecache %spareid %hostdom %libserv %pr %prp %fe %fd $readit %metacache);
119: use IO::Socket;
120: use GDBM_File;
121: use Apache::Constants qw(:common :http);
122: use HTML::TokeParser;
123: use Fcntl qw(:flock);
124:
125: # --------------------------------------------------------------------- Logging
126:
127: sub logthis {
128: my $message=shift;
129: my $execdir=$perlvar{'lonDaemons'};
130: my $now=time;
131: my $local=localtime($now);
132: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
133: print $fh "$local ($$): $message\n";
134: return 1;
135: }
136:
137: sub logperm {
138: my $message=shift;
139: my $execdir=$perlvar{'lonDaemons'};
140: my $now=time;
141: my $local=localtime($now);
142: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
143: print $fh "$now:$message:$local\n";
144: return 1;
145: }
146:
147: # -------------------------------------------------- Non-critical communication
148: sub subreply {
149: my ($cmd,$server)=@_;
150: my $peerfile="$perlvar{'lonSockDir'}/$server";
151: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
152: Type => SOCK_STREAM,
153: Timeout => 10)
154: or return "con_lost";
155: print $client "$cmd\n";
156: my $answer=<$client>;
157: if (!$answer) { $answer="con_lost"; }
158: chomp($answer);
159: return $answer;
160: }
161:
162: sub reply {
163: my ($cmd,$server)=@_;
164: my $answer=subreply($cmd,$server);
165: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
166: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
167: &logthis("<font color=blue>WARNING:".
168: " $cmd to $server returned $answer</font>");
169: }
170: return $answer;
171: }
172:
173: # ----------------------------------------------------------- Send USR1 to lonc
174:
175: sub reconlonc {
176: my $peerfile=shift;
177: &logthis("Trying to reconnect for $peerfile");
178: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
179: if (my $fh=Apache::File->new("$loncfile")) {
180: my $loncpid=<$fh>;
181: chomp($loncpid);
182: if (kill 0 => $loncpid) {
183: &logthis("lonc at pid $loncpid responding, sending USR1");
184: kill USR1 => $loncpid;
185: sleep 1;
186: if (-e "$peerfile") { return; }
187: &logthis("$peerfile still not there, give it another try");
188: sleep 5;
189: if (-e "$peerfile") { return; }
190: &logthis(
191: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
192: } else {
193: &logthis(
194: "<font color=blue>WARNING:".
195: " lonc at pid $loncpid not responding, giving up</font>");
196: }
197: } else {
198: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
199: }
200: }
201:
202: # ------------------------------------------------------ Critical communication
203:
204: sub critical {
205: my ($cmd,$server)=@_;
206: unless ($hostname{$server}) {
207: &logthis("<font color=blue>WARNING:".
208: " Critical message to unknown server ($server)</font>");
209: return 'no_such_host';
210: }
211: my $answer=reply($cmd,$server);
212: if ($answer eq 'con_lost') {
213: my $pingreply=reply('ping',$server);
214: &reconlonc("$perlvar{'lonSockDir'}/$server");
215: my $pongreply=reply('pong',$server);
216: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
217: $answer=reply($cmd,$server);
218: if ($answer eq 'con_lost') {
219: my $now=time;
220: my $middlename=$cmd;
221: $middlename=substr($middlename,0,16);
222: $middlename=~s/\W//g;
223: my $dfilename=
224: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
225: {
226: my $dfh;
227: if ($dfh=Apache::File->new(">$dfilename")) {
228: print $dfh "$cmd\n";
229: }
230: }
231: sleep 2;
232: my $wcmd='';
233: {
234: my $dfh;
235: if ($dfh=Apache::File->new("$dfilename")) {
236: $wcmd=<$dfh>;
237: }
238: }
239: chomp($wcmd);
240: if ($wcmd eq $cmd) {
241: &logthis("<font color=blue>WARNING: ".
242: "Connection buffer $dfilename: $cmd</font>");
243: &logperm("D:$server:$cmd");
244: return 'con_delayed';
245: } else {
246: &logthis("<font color=red>CRITICAL:"
247: ." Critical connection failed: $server $cmd</font>");
248: &logperm("F:$server:$cmd");
249: return 'con_failed';
250: }
251: }
252: }
253: return $answer;
254: }
255:
256: # ---------------------------------------------------------- Append Environment
257:
258: sub appenv {
259: my %newenv=@_;
260: map {
261: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
262: &logthis("<font color=blue>WARNING: ".
263: "Attempt to modify environment ".$_." to ".$newenv{$_});
264: delete($newenv{$_});
265: } else {
266: $ENV{$_}=$newenv{$_};
267: }
268: } keys %newenv;
269:
270: my $lockfh;
271: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
272: return 'error: '.$!;
273: }
274: unless (flock($lockfh,LOCK_EX)) {
275: &logthis("<font color=blue>WARNING: ".
276: 'Could not obtain exclusive lock in appenv: '.$!);
277: $lockfh->close();
278: return 'error: '.$!;
279: }
280:
281: my @oldenv;
282: {
283: my $fh;
284: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
285: return 'error: '.$!;
286: }
287: @oldenv=<$fh>;
288: $fh->close();
289: }
290: for (my $i=0; $i<=$#oldenv; $i++) {
291: chomp($oldenv[$i]);
292: if ($oldenv[$i] ne '') {
293: my ($name,$value)=split(/=/,$oldenv[$i]);
294: unless (defined($newenv{$name})) {
295: $newenv{$name}=$value;
296: }
297: }
298: }
299: {
300: my $fh;
301: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
302: return 'error';
303: }
304: my $newname;
305: foreach $newname (keys %newenv) {
306: print $fh "$newname=$newenv{$newname}\n";
307: }
308: $fh->close();
309: }
310:
311: $lockfh->close();
312: return 'ok';
313: }
314: # ----------------------------------------------------- Delete from Environment
315:
316: sub delenv {
317: my $delthis=shift;
318: my %newenv=();
319: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
320: &logthis("<font color=blue>WARNING: ".
321: "Attempt to delete from environment ".$delthis);
322: return 'error';
323: }
324: my @oldenv;
325: {
326: my $fh;
327: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
328: return 'error';
329: }
330: unless (flock($fh,LOCK_SH)) {
331: &logthis("<font color=blue>WARNING: ".
332: 'Could not obtain shared lock in delenv: '.$!);
333: $fh->close();
334: return 'error: '.$!;
335: }
336: @oldenv=<$fh>;
337: $fh->close();
338: }
339: {
340: my $fh;
341: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
342: return 'error';
343: }
344: unless (flock($fh,LOCK_EX)) {
345: &logthis("<font color=blue>WARNING: ".
346: 'Could not obtain exclusive lock in delenv: '.$!);
347: $fh->close();
348: return 'error: '.$!;
349: }
350: map {
351: unless ($_=~/^$delthis/) { print $fh $_; }
352: } @oldenv;
353: $fh->close();
354: }
355: return 'ok';
356: }
357:
358: # ------------------------------ Find server with least workload from spare.tab
359:
360: sub spareserver {
361: my $tryserver;
362: my $spareserver='';
363: my $lowestserver=100;
364: foreach $tryserver (keys %spareid) {
365: my $answer=reply('load',$tryserver);
366: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
367: $spareserver="http://$hostname{$tryserver}";
368: $lowestserver=$answer;
369: }
370: }
371: return $spareserver;
372: }
373:
374: # --------- Try to authenticate user from domain's lib servers (first this one)
375:
376: sub authenticate {
377: my ($uname,$upass,$udom)=@_;
378: $upass=escape($upass);
379: if (($perlvar{'lonRole'} eq 'library') &&
380: ($udom eq $perlvar{'lonDefDomain'})) {
381: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
382: if ($answer =~ /authorized/) {
383: if ($answer eq 'authorized') {
384: &logthis("User $uname at $udom authorized by local server");
385: return $perlvar{'lonHostID'};
386: }
387: if ($answer eq 'non_authorized') {
388: &logthis("User $uname at $udom rejected by local server");
389: return 'no_host';
390: }
391: }
392: }
393:
394: my $tryserver;
395: foreach $tryserver (keys %libserv) {
396: if ($hostdom{$tryserver} eq $udom) {
397: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
398: if ($answer =~ /authorized/) {
399: if ($answer eq 'authorized') {
400: &logthis("User $uname at $udom authorized by $tryserver");
401: return $tryserver;
402: }
403: if ($answer eq 'non_authorized') {
404: &logthis("User $uname at $udom rejected by $tryserver");
405: return 'no_host';
406: }
407: }
408: }
409: }
410: &logthis("User $uname at $udom could not be authenticated");
411: return 'no_host';
412: }
413:
414: # ---------------------- Find the homebase for a user from domain's lib servers
415:
416: sub homeserver {
417: my ($uname,$udom)=@_;
418:
419: my $index="$uname:$udom";
420: if ($homecache{$index}) { return "$homecache{$index}"; }
421:
422: my $tryserver;
423: foreach $tryserver (keys %libserv) {
424: if ($hostdom{$tryserver} eq $udom) {
425: my $answer=reply("home:$udom:$uname",$tryserver);
426: if ($answer eq 'found') {
427: $homecache{$index}=$tryserver;
428: return $tryserver;
429: }
430: }
431: }
432: return 'no_host';
433: }
434:
435: # ------------------------------------- Find the usernames behind a list of IDs
436:
437: sub idget {
438: my ($udom,@ids)=@_;
439: my %returnhash=();
440:
441: my $tryserver;
442: foreach $tryserver (keys %libserv) {
443: if ($hostdom{$tryserver} eq $udom) {
444: my $idlist=join('&',@ids);
445: $idlist=~tr/A-Z/a-z/;
446: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
447: my @answer=();
448: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
449: @answer=split(/\&/,$reply);
450: } ;
451: my $i;
452: for ($i=0;$i<=$#ids;$i++) {
453: if ($answer[$i]) {
454: $returnhash{$ids[$i]}=$answer[$i];
455: }
456: }
457: }
458: }
459: return %returnhash;
460: }
461:
462: # ------------------------------------- Find the IDs behind a list of usernames
463:
464: sub idrget {
465: my ($udom,@unames)=@_;
466: my %returnhash=();
467: map {
468: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
469: } @unames;
470: return %returnhash;
471: }
472:
473: # ------------------------------- Store away a list of names and associated IDs
474:
475: sub idput {
476: my ($udom,%ids)=@_;
477: my %servers=();
478: map {
479: my $uhom=&homeserver($_,$udom);
480: if ($uhom ne 'no_host') {
481: my $id=&escape($ids{$_});
482: $id=~tr/A-Z/a-z/;
483: my $unam=&escape($_);
484: if ($servers{$uhom}) {
485: $servers{$uhom}.='&'.$id.'='.$unam;
486: } else {
487: $servers{$uhom}=$id.'='.$unam;
488: }
489: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
490: }
491: } keys %ids;
492: map {
493: &critical('idput:'.$udom.':'.$servers{$_},$_);
494: } keys %servers;
495: }
496:
497: # ------------------------------------- Find the section of student in a course
498:
499: sub usection {
500: my ($udom,$unam,$courseid)=@_;
501: $courseid=~s/\_/\//g;
502: $courseid=~s/^(\w)/\/$1/;
503: map {
504: my ($key,$value)=split(/\=/,$_);
505: $key=&unescape($key);
506: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
507: my $section=$1;
508: if ($key eq $courseid.'_st') { $section=''; }
509: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
510: my $now=time;
511: my $notactive=0;
512: if ($start) {
513: if ($now<$start) { $notactive=1; }
514: }
515: if ($end) {
516: if ($now>$end) { $notactive=1; }
517: }
518: unless ($notactive) { return $section; }
519: }
520: } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
521: &homeserver($unam,$udom)));
522: return '-1';
523: }
524:
525: # ------------------------------------- Read an entry from a user's environment
526:
527: sub userenvironment {
528: my ($udom,$unam,@what)=@_;
529: my %returnhash=();
530: my @answer=split(/\&/,
531: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
532: &homeserver($unam,$udom)));
533: my $i;
534: for ($i=0;$i<=$#what;$i++) {
535: $returnhash{$what[$i]}=&unescape($answer[$i]);
536: }
537: return %returnhash;
538: }
539:
540: # ----------------------------- Subscribe to a resource, return URL if possible
541:
542: sub subscribe {
543: my $fname=shift;
544: my $author=$fname;
545: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
546: my ($udom,$uname)=split(/\//,$author);
547: my $home=homeserver($uname,$udom);
548: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
549: return 'not_found';
550: }
551: my $answer=reply("sub:$fname",$home);
552: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
553: $answer.=' by '.$home;
554: }
555: return $answer;
556: }
557:
558: # -------------------------------------------------------------- Replicate file
559:
560: sub repcopy {
561: my $filename=shift;
562: $filename=~s/\/+/\//g;
563: my $transname="$filename.in.transfer";
564: if ((-e $filename) || (-e $transname)) { return OK; }
565: my $remoteurl=subscribe($filename);
566: if ($remoteurl =~ /^con_lost by/) {
567: &logthis("Subscribe returned $remoteurl: $filename");
568: return HTTP_SERVICE_UNAVAILABLE;
569: } elsif ($remoteurl eq 'not_found') {
570: &logthis("Subscribe returned not_found: $filename");
571: return HTTP_NOT_FOUND;
572: } elsif ($remoteurl =~ /^rejected by/) {
573: &logthis("Subscribe returned $remoteurl: $filename");
574: return FORBIDDEN;
575: } elsif ($remoteurl eq 'directory') {
576: return OK;
577: } else {
578: my @parts=split(/\//,$filename);
579: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
580: if ($path ne "$perlvar{'lonDocRoot'}/res") {
581: &logthis("Malconfiguration for replication: $filename");
582: return HTTP_BAD_REQUEST;
583: }
584: my $count;
585: for ($count=5;$count<$#parts;$count++) {
586: $path.="/$parts[$count]";
587: if ((-e $path)!=1) {
588: mkdir($path,0777);
589: }
590: }
591: my $ua=new LWP::UserAgent;
592: my $request=new HTTP::Request('GET',"$remoteurl");
593: my $response=$ua->request($request,$transname);
594: if ($response->is_error()) {
595: unlink($transname);
596: my $message=$response->status_line;
597: &logthis("<font color=blue>WARNING:"
598: ." LWP get: $message: $filename</font>");
599: return HTTP_SERVICE_UNAVAILABLE;
600: } else {
601: if ($remoteurl!~/\.meta$/) {
602: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
603: my $mresponse=$ua->request($mrequest,$filename.'.meta');
604: if ($mresponse->is_error()) {
605: unlink($filename.'.meta');
606: &logthis(
607: "<font color=yellow>INFO: No metadata: $filename</font>");
608: }
609: }
610: rename($transname,$filename);
611: return OK;
612: }
613: }
614: }
615:
616: # --------------------------------------------------------- Server Side Include
617:
618: sub ssi {
619:
620: my ($fn,%form)=@_;
621:
622: my $ua=new LWP::UserAgent;
623:
624: my $request;
625:
626: if (%form) {
627: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
628: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
629: } else {
630: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
631: }
632:
633: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
634: my $response=$ua->request($request);
635:
636: return $response->content;
637: }
638:
639: # ------------------------------------------------------------------------- Log
640:
641: sub log {
642: my ($dom,$nam,$hom,$what)=@_;
643: return critical("log:$dom:$nam:$what",$hom);
644: }
645:
646: # --------------------------------------------- Set Expire Date for Spreadsheet
647:
648: sub expirespread {
649: my ($uname,$udom,$stype,$usymb)=@_;
650: my $cid=$ENV{'request.course.id'};
651: if ($cid) {
652: my $now=time;
653: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
654: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
655: $ENV{'course.'.$cid.'.num'}.
656: ':nohist_expirationdates:'.
657: &escape($key).'='.$now,
658: $ENV{'course.'.$cid.'.home'})
659: }
660: return 'ok';
661: }
662:
663: # ----------------------------------------------------- Devalidate Spreadsheets
664:
665: sub devalidate {
666: my $symb=shift;
667: my $cid=$ENV{'request.course.id'};
668: if ($cid) {
669: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
670: my $status=
671: &reply('del:'.$ENV{'course.'.$cid.'.domain'}.':'.
672: $ENV{'course.'.$cid.'.num'}.
673: ':nohist_calculatedsheets:'.
674: &escape($key.'studentcalc:'),
675: $ENV{'course.'.$cid.'.home'})
676: .' '.
677: &reply('del:'.$ENV{'user.domain'}.':'.
678: $ENV{'user.name'}.
679: ':nohist_calculatedsheets_'.$cid.':'.
680: &escape($key.'assesscalc:'.$symb),
681: $ENV{'user.home'});
682: unless ($status eq 'ok ok') {
683: &logthis('Could not devalidate spreadsheet '.
684: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
685: $symb.': '.$status);
686: }
687: }
688: }
689:
690: # ----------------------------------------------------------------------- Store
691:
692: sub store {
693: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
694: my $home='';
695:
696: if ($stuname) {
697: $home=&homeserver($stuname,$domain);
698: }
699:
700: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
701:
702: &devalidate($symb);
703:
704: $symb=escape($symb);
705: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
706: if (!$domain) { $domain=$ENV{'user.domain'}; }
707: if (!$stuname) { $stuname=$ENV{'user.name'}; }
708: if (!$home) { $home=$ENV{'user.home'}; }
709: my $namevalue='';
710: map {
711: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
712: } keys %$storehash;
713: $namevalue=~s/\&$//;
714: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
715: }
716:
717: # -------------------------------------------------------------- Critical Store
718:
719: sub cstore {
720: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
721: my $home='';
722:
723: if ($stuname) {
724: $home=&homeserver($stuname,$domain);
725: }
726:
727: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
728:
729: &devalidate($symb);
730:
731: $symb=escape($symb);
732: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
733: if (!$domain) { $domain=$ENV{'user.domain'}; }
734: if (!$stuname) { $stuname=$ENV{'user.name'}; }
735: if (!$home) { $home=$ENV{'user.home'}; }
736:
737: my $namevalue='';
738: map {
739: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
740: } keys %$storehash;
741: $namevalue=~s/\&$//;
742: return critical("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
743: }
744:
745: # --------------------------------------------------------------------- Restore
746:
747: sub restore {
748: my ($symb,$namespace,$domain,$stuname) = @_;
749: my $home='';
750:
751: if ($stuname) {
752: $home=&homeserver($stuname,$domain);
753: }
754:
755: if (!$symb) {
756: unless ($symb=escape(&symbread())) { return ''; }
757: } else {
758: $symb=&escape($symb);
759: }
760: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
761: if (!$domain) { $domain=$ENV{'user.domain'}; }
762: if (!$stuname) { $stuname=$ENV{'user.name'}; }
763: if (!$home) { $home=$ENV{'user.home'}; }
764: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
765:
766: my %returnhash=();
767: map {
768: my ($name,$value)=split(/\=/,$_);
769: $returnhash{&unescape($name)}=&unescape($value);
770: } split(/\&/,$answer);
771: my $version;
772: for ($version=1;$version<=$returnhash{'version'};$version++) {
773: map {
774: $returnhash{$_}=$returnhash{$version.':'.$_};
775: } split(/\:/,$returnhash{$version.':keys'});
776: }
777: return %returnhash;
778: }
779:
780: # ---------------------------------------------------------- Course Description
781:
782: sub coursedescription {
783: my $courseid=shift;
784: $courseid=~s/^\///;
785: $courseid=~s/\_/\//g;
786: my ($cdomain,$cnum)=split(/\//,$courseid);
787: my $chome=homeserver($cnum,$cdomain);
788: if ($chome ne 'no_host') {
789: my $rep=reply("dump:$cdomain:$cnum:environment",$chome);
790: if ($rep ne 'con_lost') {
791: my $normalid=$cdomain.'_'.$cnum;
792: my %envhash=();
793: my %returnhash=('home' => $chome,
794: 'domain' => $cdomain,
795: 'num' => $cnum);
796: map {
797: my ($name,$value)=split(/\=/,$_);
798: $name=&unescape($name);
799: $value=&unescape($value);
800: $returnhash{$name}=$value;
801: $envhash{'course.'.$normalid.'.'.$name}=$value;
802: } split(/\&/,$rep);
803: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
804: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
805: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
806: $envhash{'course.'.$normalid.'.last_cache'}=time;
807: $envhash{'course.'.$normalid.'.home'}=$chome;
808: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
809: $envhash{'course.'.$normalid.'.num'}=$cnum;
810: &appenv(%envhash);
811: return %returnhash;
812: }
813: }
814: return ();
815: }
816:
817: # -------------------------------------------------------- Get user privileges
818:
819: sub rolesinit {
820: my ($domain,$username,$authhost)=@_;
821: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
822: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
823: my %allroles=();
824: my %thesepriv=();
825: my $now=time;
826: my $userroles="user.login.time=$now\n";
827: my $thesestr;
828:
829: if ($rolesdump ne '') {
830: map {
831: if ($_!~/^rolesdef\&/) {
832: my ($area,$role)=split(/=/,$_);
833: $area=~s/\_\w\w$//;
834: my ($trole,$tend,$tstart)=split(/_/,$role);
835: $userroles.='user.role.'.$trole.'.'.$area.'='.
836: $tstart.'.'.$tend."\n";
837: if ($tend!=0) {
838: if ($tend<$now) {
839: $trole='';
840: }
841: }
842: if ($tstart!=0) {
843: if ($tstart>$now) {
844: $trole='';
845: }
846: }
847: if (($area ne '') && ($trole ne '')) {
848: my $spec=$trole.'.'.$area;
849: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
850: if ($trole =~ /^cr\//) {
851: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
852: my $homsvr=homeserver($rauthor,$rdomain);
853: if ($hostname{$homsvr} ne '') {
854: my $roledef=
855: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
856: $homsvr);
857: if (($roledef ne 'con_lost') && ($roledef ne '')) {
858: my ($syspriv,$dompriv,$coursepriv)=
859: split(/\_/,unescape($roledef));
860: $allroles{'cm./'}.=':'.$syspriv;
861: $allroles{$spec.'./'}.=':'.$syspriv;
862: if ($tdomain ne '') {
863: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
864: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
865: if ($trest ne '') {
866: $allroles{'cm.'.$area}.=':'.$coursepriv;
867: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
868: }
869: }
870: }
871: }
872: } else {
873: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
874: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
875: if ($tdomain ne '') {
876: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
877: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
878: if ($trest ne '') {
879: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
880: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
881: }
882: }
883: }
884: }
885: }
886: } split(/&/,$rolesdump);
887: my $adv=0;
888: my $author=0;
889: map {
890: %thesepriv=();
891: if ($_!~/^st/) { $adv=1; }
892: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
893: map {
894: if ($_ ne '') {
895: my ($privilege,$restrictions)=split(/&/,$_);
896: if ($restrictions eq '') {
897: $thesepriv{$privilege}='F';
898: } else {
899: if ($thesepriv{$privilege} ne 'F') {
900: $thesepriv{$privilege}.=$restrictions;
901: }
902: }
903: }
904: } split(/:/,$allroles{$_});
905: $thesestr='';
906: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
907: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
908: } keys %allroles;
909: $userroles.='user.adv='.$adv."\n".
910: 'user.author='.$author."\n";
911: $ENV{'user.adv'}=$adv;
912: }
913: return $userroles;
914: }
915:
916: # --------------------------------------------------------------- get interface
917:
918: sub get {
919: my ($namespace,@storearr)=@_;
920: my $items='';
921: map {
922: $items.=escape($_).'&';
923: } @storearr;
924: $items=~s/\&$//;
925: my $rep=reply("get:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
926: $ENV{'user.home'});
927: my @pairs=split(/\&/,$rep);
928: my %returnhash=();
929: my $i=0;
930: map {
931: $returnhash{$_}=unescape($pairs[$i]);
932: $i++;
933: } @storearr;
934: return %returnhash;
935: }
936:
937: # --------------------------------------------------------------- del interface
938:
939: sub del {
940: my ($namespace,@storearr)=@_;
941: my $items='';
942: map {
943: $items.=escape($_).'&';
944: } @storearr;
945: $items=~s/\&$//;
946: return reply("del:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
947: $ENV{'user.home'});
948: }
949:
950: # -------------------------------------------------------------- dump interface
951:
952: sub dump {
953: my $namespace=shift;
954: my $rep=reply("dump:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace",
955: $ENV{'user.home'});
956: my @pairs=split(/\&/,$rep);
957: my %returnhash=();
958: map {
959: my ($key,$value)=split(/=/,$_);
960: $returnhash{unescape($key)}=unescape($value);
961: } @pairs;
962: return %returnhash;
963: }
964:
965: # --------------------------------------------------------------- put interface
966:
967: sub put {
968: my ($namespace,%storehash)=@_;
969: my $items='';
970: map {
971: $items.=escape($_).'='.escape($storehash{$_}).'&';
972: } keys %storehash;
973: $items=~s/\&$//;
974: return reply("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
975: $ENV{'user.home'});
976: }
977:
978: # ------------------------------------------------------ critical put interface
979:
980: sub cput {
981: my ($namespace,%storehash)=@_;
982: my $items='';
983: map {
984: $items.=escape($_).'='.escape($storehash{$_}).'&';
985: } keys %storehash;
986: $items=~s/\&$//;
987: return critical
988: ("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
989: $ENV{'user.home'});
990: }
991:
992: # -------------------------------------------------------------- eget interface
993:
994: sub eget {
995: my ($namespace,@storearr)=@_;
996: my $items='';
997: map {
998: $items.=escape($_).'&';
999: } @storearr;
1000: $items=~s/\&$//;
1001: my $rep=reply("eget:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
1002: $ENV{'user.home'});
1003: my @pairs=split(/\&/,$rep);
1004: my %returnhash=();
1005: my $i=0;
1006: map {
1007: $returnhash{$_}=unescape($pairs[$i]);
1008: $i++;
1009: } @storearr;
1010: return %returnhash;
1011: }
1012:
1013: # ------------------------------------------------- Check for a user privilege
1014:
1015: sub allowed {
1016: my ($priv,$uri)=@_;
1017: $uri=&declutter($uri);
1018:
1019: # Free bre access to adm and meta resources
1020:
1021: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1022: return 'F';
1023: }
1024:
1025: my $thisallowed='';
1026: my $statecond=0;
1027: my $courseprivid='';
1028:
1029: # Course
1030:
1031: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1032: $thisallowed.=$1;
1033: }
1034:
1035: # Domain
1036:
1037: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1038: =~/$priv\&([^\:]*)/) {
1039: $thisallowed.=$1;
1040: }
1041:
1042: # Course: uri itself is a course
1043: my $courseuri=$uri;
1044: $courseuri=~s/\_(\d)/\/$1/;
1045: $courseuri=~s/^([^\/])/\/$1/;
1046:
1047: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1048: =~/$priv\&([^\:]*)/) {
1049: $thisallowed.=$1;
1050: }
1051:
1052: # Full access at system, domain or course-wide level? Exit.
1053:
1054: if ($thisallowed=~/F/) {
1055: return 'F';
1056: }
1057:
1058: # If this is generating or modifying users, exit with special codes
1059:
1060: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:'=~/\:$priv\:/) {
1061: return $thisallowed;
1062: }
1063: #
1064: # Gathered so far: system, domain and course wide privileges
1065: #
1066: # Course: See if uri or referer is an individual resource that is part of
1067: # the course
1068:
1069: if ($ENV{'request.course.id'}) {
1070: $courseprivid=$ENV{'request.course.id'};
1071: if ($ENV{'request.course.sec'}) {
1072: $courseprivid.='/'.$ENV{'request.course.sec'};
1073: }
1074: $courseprivid=~s/\_/\//;
1075: my $checkreferer=1;
1076: my @uriparts=split(/\//,$uri);
1077: my $filename=$uriparts[$#uriparts];
1078: my $pathname=$uri;
1079: $pathname=~s/\/$filename$//;
1080: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1081: /\&$filename\:([\d\|]+)\&/) {
1082: $statecond=$1;
1083: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1084: =~/$priv\&([^\:]*)/) {
1085: $thisallowed.=$1;
1086: $checkreferer=0;
1087: }
1088: }
1089:
1090: if (($ENV{'HTTP_REFERER'}) && ($checkreferer)) {
1091: my $refuri=$ENV{'HTTP_REFERER'};
1092: $refuri=~s/^http\:\/\/$ENV{'request.host'}//i;
1093: $refuri=&declutter($refuri);
1094: my @uriparts=split(/\//,$refuri);
1095: my $filename=$uriparts[$#uriparts];
1096: my $pathname=$refuri;
1097: $pathname=~s/\/$filename$//;
1098: my @filenameparts=split(/\./,$uri);
1099: if (&fileembstyle($filenameparts[$#filenameparts]) ne 'ssi') {
1100: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1101: /\&$filename\:([\d\|]+)\&/) {
1102: my $refstatecond=$1;
1103: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1104: =~/$priv\&([^\:]*)/) {
1105: $thisallowed.=$1;
1106: $uri=$refuri;
1107: $statecond=$refstatecond;
1108: }
1109: }
1110: }
1111: }
1112: }
1113:
1114: #
1115: # Gathered now: all privileges that could apply, and condition number
1116: #
1117: #
1118: # Full or no access?
1119: #
1120:
1121: if ($thisallowed=~/F/) {
1122: return 'F';
1123: }
1124:
1125: unless ($thisallowed) {
1126: return '';
1127: }
1128:
1129: # Restrictions exist, deal with them
1130: #
1131: # C:according to course preferences
1132: # R:according to resource settings
1133: # L:unless locked
1134: # X:according to user session state
1135: #
1136:
1137: # Possibly locked functionality, check all courses
1138: # Locks might take effect only after 10 minutes cache expiration for other
1139: # courses, and 2 minutes for current course
1140:
1141: my $envkey;
1142: if ($thisallowed=~/L/) {
1143: foreach $envkey (keys %ENV) {
1144: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1145: my $courseid=$2;
1146: my $roleid=$1.'.'.$2;
1147: $courseid=~s/^\///;
1148: my $expiretime=600;
1149: if ($ENV{'request.role'} eq $roleid) {
1150: $expiretime=120;
1151: }
1152: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1153: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1154: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1155: &coursedescription($courseid);
1156: }
1157: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1158: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1159: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1160: &log($ENV{'user.domain'},$ENV{'user.name'},
1161: $ENV{'user.host'},
1162: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1163: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1164: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1165: return '';
1166: }
1167: }
1168: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1169: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1170: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1171: &log($ENV{'user.domain'},$ENV{'user.name'},
1172: $ENV{'user.host'},
1173: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1174: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1175: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1176: return '';
1177: }
1178: }
1179: }
1180: }
1181: }
1182:
1183: #
1184: # Rest of the restrictions depend on selected course
1185: #
1186:
1187: unless ($ENV{'request.course.id'}) {
1188: return '1';
1189: }
1190:
1191: #
1192: # Now user is definitely in a course
1193: #
1194:
1195:
1196: # Course preferences
1197:
1198: if ($thisallowed=~/C/) {
1199: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1200: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1201: =~/\,$rolecode\,/) {
1202: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1203: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1204: $ENV{'request.course.id'});
1205: return '';
1206: }
1207: }
1208:
1209: # Resource preferences
1210:
1211: if ($thisallowed=~/R/) {
1212: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1213: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1214: if (-e $filename) {
1215: my @content;
1216: {
1217: my $fh=Apache::File->new($filename);
1218: @content=<$fh>;
1219: }
1220: if (join('',@content)=~
1221: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1222: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1223: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1224: return '';
1225:
1226: }
1227: }
1228: }
1229:
1230: # Restricted by state?
1231:
1232: if ($thisallowed=~/X/) {
1233: if (&condval($statecond)) {
1234: return '2';
1235: } else {
1236: return '';
1237: }
1238: }
1239:
1240: return 'F';
1241: }
1242:
1243: # ----------------------------------------------------------------- Define Role
1244:
1245: sub definerole {
1246: if (allowed('mcr','/')) {
1247: my ($rolename,$sysrole,$domrole,$courole)=@_;
1248: map {
1249: my ($crole,$cqual)=split(/\&/,$_);
1250: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1251: if ($pr{'cr:s'}=~/$crole\&/) {
1252: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1253: return "refused:s:$crole&$cqual";
1254: }
1255: }
1256: } split('/',$sysrole);
1257: map {
1258: my ($crole,$cqual)=split(/\&/,$_);
1259: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1260: if ($pr{'cr:d'}=~/$crole\&/) {
1261: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1262: return "refused:d:$crole&$cqual";
1263: }
1264: }
1265: } split('/',$domrole);
1266: map {
1267: my ($crole,$cqual)=split(/\&/,$_);
1268: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1269: if ($pr{'cr:c'}=~/$crole\&/) {
1270: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1271: return "refused:c:$crole&$cqual";
1272: }
1273: }
1274: } split('/',$courole);
1275: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1276: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1277: "rolesdef_$rolename=".
1278: escape($sysrole.'_'.$domrole.'_'.$courole);
1279: return reply($command,$ENV{'user.home'});
1280: } else {
1281: return 'refused';
1282: }
1283: }
1284:
1285: # ---------------- Make a metadata query against the network of library servers
1286:
1287: sub metadata_query {
1288: my ($query,$custom,$customshow)=@_;
1289: # need to put in a library server loop here and return a hash
1290: my %rhash;
1291: for my $server (keys %libserv) {
1292: unless ($custom or $customshow) {
1293: my $reply=&reply("querysend:".&escape($query),$server);
1294: $rhash{$server}=$reply;
1295: }
1296: else {
1297: my $reply=&reply("querysend:".&escape($query).':'.
1298: &escape($custom).':'.&escape($customshow),
1299: $server);
1300: $rhash{$server}=$reply;
1301: }
1302: }
1303: return \%rhash;
1304: }
1305:
1306: # ------------------------------------------------------------------ Plain Text
1307:
1308: sub plaintext {
1309: my $short=shift;
1310: return $prp{$short};
1311: }
1312:
1313: # ------------------------------------------------------------------ Plain Text
1314:
1315: sub fileembstyle {
1316: my $ending=shift;
1317: return $fe{$ending};
1318: }
1319:
1320: # ------------------------------------------------------------ Description Text
1321:
1322: sub filedescription {
1323: my $ending=shift;
1324: return $fd{$ending};
1325: }
1326:
1327: # ----------------------------------------------------------------- Assign Role
1328:
1329: sub assignrole {
1330: my ($udom,$uname,$url,$role,$end,$start)=@_;
1331: my $mrole;
1332: if ($role =~ /^cr\//) {
1333: unless (&allowed('ccr',$url)) {
1334: &logthis('Refused custom assignrole: '.
1335: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1336: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1337: return 'refused';
1338: }
1339: $mrole='cr';
1340: } else {
1341: my $cwosec=$url;
1342: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1343: unless (&allowed('c'.$role,$cwosec)) {
1344: &logthis('Refused assignrole: '.
1345: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1346: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1347: return 'refused';
1348: }
1349: $mrole=$role;
1350: }
1351: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1352: "$udom:$uname:$url".'_'."$mrole=$role";
1353: if ($end) { $command.='_'.$end; }
1354: if ($start) {
1355: if ($end) {
1356: $command.='_'.$start;
1357: } else {
1358: $command.='_0_'.$start;
1359: }
1360: }
1361: return &reply($command,&homeserver($uname,$udom));
1362: }
1363:
1364: # --------------------------------------------------------------- Modify a user
1365:
1366:
1367: sub modifyuser {
1368: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1369: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1370: $umode.', '.$first.', '.$middle.', '.
1371: $last.', '.$gene.' by '.
1372: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1373: my $uhome=&homeserver($uname,$udom);
1374: # ----------------------------------------------------------------- Create User
1375: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1376: my $unhome='';
1377: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1378: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1379: } else {
1380: my $tryserver;
1381: my $loadm=10000000;
1382: foreach $tryserver (keys %libserv) {
1383: if ($hostdom{$tryserver} eq $udom) {
1384: my $answer=reply('load',$tryserver);
1385: if (($answer=~/\d+/) && ($answer<$loadm)) {
1386: $loadm=$answer;
1387: $unhome=$tryserver;
1388: }
1389: }
1390: }
1391: }
1392: if (($unhome eq '') || ($unhome eq 'no_host')) {
1393: return 'error: find home';
1394: }
1395: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1396: &escape($upass),$unhome);
1397: unless ($reply eq 'ok') {
1398: return 'error: '.$reply;
1399: }
1400: $uhome=&homeserver($uname,$udom);
1401: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1402: return 'error: verify home';
1403: }
1404: }
1405: # ---------------------------------------------------------------------- Add ID
1406: if ($uid) {
1407: $uid=~tr/A-Z/a-z/;
1408: my %uidhash=&idrget($udom,$uname);
1409: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1410: unless ($uid eq $uidhash{$uname}) {
1411: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1412: }
1413: } else {
1414: &idput($udom,($uname => $uid));
1415: }
1416: }
1417: # -------------------------------------------------------------- Add names, etc
1418: my $names=&reply('get:'.$udom.':'.$uname.
1419: ':environment:firstname&middlename&lastname&generation',
1420: $uhome);
1421: my ($efirst,$emiddle,$elast,$egene)=split(/\&/,$names);
1422: if ($first) { $efirst = &escape($first); }
1423: if ($middle) { $emiddle = &escape($middle); }
1424: if ($last) { $elast = &escape($last); }
1425: if ($gene) { $egene = &escape($gene); }
1426: my $reply=&reply('put:'.$udom.':'.$uname.
1427: ':environment:firstname='.$efirst.
1428: '&middlename='.$emiddle.
1429: '&lastname='.$elast.
1430: '&generation='.$egene,$uhome);
1431: if ($reply ne 'ok') {
1432: return 'error: '.$reply;
1433: }
1434: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1435: $umode.', '.$first.', '.$middle.', '.
1436: $last.', '.$gene.' by '.
1437: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1438: return 'ok';
1439: }
1440:
1441: # -------------------------------------------------------------- Modify student
1442:
1443: sub modifystudent {
1444: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1445: $end,$start)=@_;
1446: my $cid='';
1447: unless ($cid=$ENV{'request.course.id'}) {
1448: return 'not_in_class';
1449: }
1450: # --------------------------------------------------------------- Make the user
1451: my $reply=&modifyuser
1452: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1453: unless ($reply eq 'ok') { return $reply; }
1454: my $uhome=&homeserver($uname,$udom);
1455: if (($uhome eq '') || ($uhome eq 'no_host')) {
1456: return 'error: no such user';
1457: }
1458: # -------------------------------------------------- Add student to course list
1459: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1460: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1461: &escape($uname.':'.$udom).'='.
1462: &escape($end.':'.$start),
1463: $ENV{'course.'.$cid.'.home'});
1464: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1465: return 'error: '.$reply;
1466: }
1467: # ---------------------------------------------------- Add student role to user
1468: my $uurl='/'.$cid;
1469: $uurl=~s/\_/\//g;
1470: if ($usec) {
1471: $uurl.='/'.$usec;
1472: }
1473: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1474: }
1475:
1476: # ------------------------------------------------- Write to course preferences
1477:
1478: sub writecoursepref {
1479: my ($courseid,%prefs)=@_;
1480: $courseid=~s/^\///;
1481: $courseid=~s/\_/\//g;
1482: my ($cdomain,$cnum)=split(/\//,$courseid);
1483: my $chome=homeserver($cnum,$cdomain);
1484: if (($chome eq '') || ($chome eq 'no_host')) {
1485: return 'error: no such course';
1486: }
1487: my $cstring='';
1488: map {
1489: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1490: } keys %prefs;
1491: $cstring=~s/\&$//;
1492: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1493: }
1494:
1495: # ---------------------------------------------------------- Make/modify course
1496:
1497: sub createcourse {
1498: my ($udom,$description,$url)=@_;
1499: $url=&declutter($url);
1500: my $cid='';
1501: unless (&allowed('ccc',$ENV{'user.domain'})) {
1502: return 'refused';
1503: }
1504: unless ($udom eq $ENV{'user.domain'}) {
1505: return 'refused';
1506: }
1507: # ------------------------------------------------------------------- Create ID
1508: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1509: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1510: # ----------------------------------------------- Make sure that does not exist
1511: my $uhome=&homeserver($uname,$udom);
1512: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1513: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1514: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1515: $uhome=&homeserver($uname,$udom);
1516: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1517: return 'error: unable to generate unique course-ID';
1518: }
1519: }
1520: # ------------------------------------------------------------- Make the course
1521: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1522: $ENV{'user.home'});
1523: unless ($reply eq 'ok') { return 'error: '.$reply; }
1524: my $uhome=&homeserver($uname,$udom);
1525: if (($uhome eq '') || ($uhome eq 'no_host')) {
1526: return 'error: no such course';
1527: }
1528: &writecoursepref($udom.'_'.$uname,
1529: ('description' => $description,
1530: 'url' => $url));
1531: return '/'.$udom.'/'.$uname;
1532: }
1533:
1534: # ---------------------------------------------------------- Assign Custom Role
1535:
1536: sub assigncustomrole {
1537: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1538: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1539: $end,$start);
1540: }
1541:
1542: # ----------------------------------------------------------------- Revoke Role
1543:
1544: sub revokerole {
1545: my ($udom,$uname,$url,$role)=@_;
1546: my $now=time;
1547: return &assignrole($udom,$uname,$url,$role,$now);
1548: }
1549:
1550: # ---------------------------------------------------------- Revoke Custom Role
1551:
1552: sub revokecustomrole {
1553: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1554: my $now=time;
1555: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1556: }
1557:
1558: # ------------------------------------------------------------ Directory lister
1559:
1560: sub dirlist {
1561: my $uri=shift;
1562: $uri=~s/^\///;
1563: $uri=~s/\/$//;
1564: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1565: if ($udom) {
1566: if ($uname) {
1567: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1568: homeserver($uname,$udom));
1569: return split(/:/,$listing);
1570: } else {
1571: my $tryserver;
1572: my %allusers=();
1573: foreach $tryserver (keys %libserv) {
1574: if ($hostdom{$tryserver} eq $udom) {
1575: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1576: $tryserver);
1577: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1578: && ($listing ne 'con_lost')) {
1579: map {
1580: my ($entry,@stat)=split(/&/,$_);
1581: $allusers{$entry}=1;
1582: } split(/:/,$listing);
1583: }
1584: }
1585: }
1586: my $alluserstr='';
1587: map {
1588: $alluserstr.=$_.'&user:';
1589: } sort keys %allusers;
1590: $alluserstr=~s/:$//;
1591: return split(/:/,$alluserstr);
1592: }
1593: } else {
1594: my $tryserver;
1595: my %alldom=();
1596: foreach $tryserver (keys %libserv) {
1597: $alldom{$hostdom{$tryserver}}=1;
1598: }
1599: my $alldomstr='';
1600: map {
1601: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1602: } sort keys %alldom;
1603: $alldomstr=~s/:$//;
1604: return split(/:/,$alldomstr);
1605: }
1606: }
1607:
1608: # -------------------------------------------------------- Value of a Condition
1609:
1610: sub directcondval {
1611: my $number=shift;
1612: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1613: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1614: } else {
1615: return 2;
1616: }
1617: }
1618:
1619: sub condval {
1620: my $condidx=shift;
1621: my $result=0;
1622: my $allpathcond='';
1623: map {
1624: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
1625: $allpathcond.=
1626: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
1627: }
1628: } split(/\|/,$condidx);
1629: $allpathcond=~s/\|$//;
1630: if ($ENV{'request.course.id'}) {
1631: if ($allpathcond) {
1632: my $operand='|';
1633: my @stack;
1634: map {
1635: if ($_ eq '(') {
1636: push @stack,($operand,$result)
1637: } elsif ($_ eq ')') {
1638: my $before=pop @stack;
1639: if (pop @stack eq '&') {
1640: $result=$result>$before?$before:$result;
1641: } else {
1642: $result=$result>$before?$result:$before;
1643: }
1644: } elsif (($_ eq '&') || ($_ eq '|')) {
1645: $operand=$_;
1646: } else {
1647: my $new=directcondval($_);
1648: if ($operand eq '&') {
1649: $result=$result>$new?$new:$result;
1650: } else {
1651: $result=$result>$new?$result:$new;
1652: }
1653: }
1654: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
1655: }
1656: }
1657: return $result;
1658: }
1659:
1660: # --------------------------------------------------------- Value of a Variable
1661:
1662: sub EXT {
1663: my $varname=shift;
1664: unless ($varname) { return ''; }
1665: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
1666: my $rest;
1667: if ($therest[0]) {
1668: $rest=join('.',@therest);
1669: } else {
1670: $rest='';
1671: }
1672: my $qualifierrest=$qualifier;
1673: if ($rest) { $qualifierrest.='.'.$rest; }
1674: my $spacequalifierrest=$space;
1675: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1676: if ($realm eq 'user') {
1677: # --------------------------------------------------------------- user.resource
1678: if ($space eq 'resource') {
1679: my %restored=&restore();
1680: return $restored{$qualifierrest};
1681: # ----------------------------------------------------------------- user.access
1682: } elsif ($space eq 'access') {
1683: return &allowed($qualifier,$rest);
1684: # ------------------------------------------ user.preferences, user.environment
1685: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1686: return $ENV{join('.',('environment',$qualifierrest))};
1687: # ----------------------------------------------------------------- user.course
1688: } elsif ($space eq 'course') {
1689: return $ENV{join('.',('request.course',$qualifier))};
1690: # ------------------------------------------------------------------- user.role
1691: } elsif ($space eq 'role') {
1692: my ($role,$where)=split(/\./,$ENV{'request.role'});
1693: if ($qualifier eq 'value') {
1694: return $role;
1695: } elsif ($qualifier eq 'extent') {
1696: return $where;
1697: }
1698: # ----------------------------------------------------------------- user.domain
1699: } elsif ($space eq 'domain') {
1700: return $ENV{'user.domain'};
1701: # ------------------------------------------------------------------- user.name
1702: } elsif ($space eq 'name') {
1703: return $ENV{'user.name'};
1704: # ---------------------------------------------------- Any other user namespace
1705: } else {
1706: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
1707: my %reply=&get($space,$item);
1708: return $reply{$item};
1709: }
1710: } elsif ($realm eq 'request') {
1711: # ------------------------------------------------------------- request.browser
1712: if ($space eq 'browser') {
1713: return $ENV{'browser.'.$qualifier};
1714: # ------------------------------------------------------------ request.filename
1715: } else {
1716: return $ENV{'request.'.$spacequalifierrest};
1717: }
1718: } elsif ($realm eq 'course') {
1719: # ---------------------------------------------------------- course.description
1720: return $ENV{'course.'.$ENV{'request.course.id'}.'.'.
1721: $spacequalifierrest};
1722: } elsif ($realm eq 'resource') {
1723: if ($ENV{'request.course.id'}) {
1724: # ----------------------------------------------------- Cascading lookup scheme
1725: my $symbp=&symbread();
1726: my $mapp=(split(/\_\_\_/,$symbp))[0];
1727:
1728: my $symbparm=$symbp.'.'.$spacequalifierrest;
1729: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
1730:
1731: my $seclevel=
1732: $ENV{'request.course.id'}.'.['.
1733: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
1734: my $seclevelr=
1735: $ENV{'request.course.id'}.'.['.
1736: $ENV{'request.course.sec'}.'].'.$symbparm;
1737: my $seclevelm=
1738: $ENV{'request.course.id'}.'.['.
1739: $ENV{'request.course.sec'}.'].'.$mapparm;
1740:
1741: my $courselevel=
1742: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
1743: my $courselevelr=
1744: $ENV{'request.course.id'}.'.'.$symbparm;
1745: my $courselevelm=
1746: $ENV{'request.course.id'}.'.'.$mapparm;
1747:
1748: # ----------------------------------------------------------- first, check user
1749: my %resourcedata=get('resourcedata',
1750: ($courselevelr,$courselevelm,$courselevel));
1751: if (($resourcedata{$courselevelr}!~/^error\:/) &&
1752: ($resourcedata{$courselevelr}!~/^con_lost/)) {
1753:
1754: if ($resourcedata{$courselevelr}) {
1755: return $resourcedata{$courselevelr}; }
1756: if ($resourcedata{$courselevelm}) {
1757: return $resourcedata{$courselevelm}; }
1758: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
1759:
1760: } else {
1761: if ($resourcedata{$courselevelr}!~/No such file/) {
1762: &logthis("<font color=blue>WARNING:".
1763: " Trying to get resource data for ".$ENV{'user.name'}." at "
1764: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
1765: "</font>");
1766: }
1767: }
1768:
1769: # -------------------------------------------------------- second, check course
1770:
1771: my $reply=&reply('get:'.
1772: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
1773: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1774: ':resourcedata:'.
1775: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
1776: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
1777: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
1778: if ($reply!~/^error\:/) {
1779: map {
1780: if ($_) { return &unescape($_); }
1781: } split(/\&/,$reply);
1782: }
1783: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
1784: &logthis("<font color=blue>WARNING:".
1785: " Getting ".$reply." asking for ".$varname." for ".
1786: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1787: ' at '.
1788: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
1789: ' from '.
1790: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
1791: "</font>");
1792: }
1793: # ------------------------------------------------------ third, check map parms
1794: my %parmhash=();
1795: my $thisparm='';
1796: if (tie(%parmhash,'GDBM_File',
1797: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
1798: $thisparm=$parmhash{$symbparm};
1799: untie(%parmhash);
1800: }
1801: if ($thisparm) { return $thisparm; }
1802: }
1803:
1804: # --------------------------------------------- last, look in resource metadata
1805:
1806: $spacequalifierrest=~s/\./\_/;
1807: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
1808: if ($metadata) { return $metadata; }
1809: $metadata=&metadata($ENV{'request.filename'},
1810: 'parameter_'.$spacequalifierrest);
1811: if ($metadata) { return $metadata; }
1812:
1813: # ---------------------------------------------------- Any other user namespace
1814: } elsif ($realm eq 'environment') {
1815: # ----------------------------------------------------------------- environment
1816: return $ENV{'environment.'.$spacequalifierrest};
1817: } elsif ($realm eq 'system') {
1818: # ----------------------------------------------------------------- system.time
1819: if ($space eq 'time') {
1820: return time;
1821: }
1822: }
1823: return '';
1824: }
1825:
1826: # ---------------------------------------------------------------- Get metadata
1827:
1828: sub metadata {
1829: my ($uri,$what)=@_;
1830:
1831: $uri=&declutter($uri);
1832: my $filename=$uri;
1833: $uri=~s/\.meta$//;
1834: unless ($metacache{$uri.':keys'}) {
1835: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
1836: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
1837: my $parser=HTML::TokeParser->new(\$metastring);
1838: my $token;
1839: while ($token=$parser->get_token) {
1840: if ($token->[0] eq 'S') {
1841: my $entry=$token->[1];
1842: my $unikey=$entry;
1843: if (defined($token->[2]->{'part'})) {
1844: $unikey.='_'.$token->[2]->{'part'};
1845: }
1846: if (defined($token->[2]->{'name'})) {
1847: $unikey.='_'.$token->[2]->{'name'};
1848: }
1849: if ($metacache{$uri.':keys'}) {
1850: $metacache{$uri.':keys'}.=','.$unikey;
1851: } else {
1852: $metacache{$uri.':keys'}=$unikey;
1853: }
1854: map {
1855: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
1856: } @{$token->[3]};
1857: unless (
1858: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
1859: ) { $metacache{$uri.':'.$unikey}=
1860: $metacache{$uri.':'.$unikey.'.default'};
1861: }
1862: }
1863: }
1864: }
1865: return $metacache{$uri.':'.$what};
1866: }
1867:
1868: # ------------------------------------------------- Update symbolic store links
1869:
1870: sub symblist {
1871: my ($mapname,%newhash)=@_;
1872: $mapname=declutter($mapname);
1873: my %hash;
1874: if (($ENV{'request.course.fn'}) && (%newhash)) {
1875: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1876: &GDBM_WRCREAT,0640)) {
1877: map {
1878: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
1879: } keys %newhash;
1880: if (untie(%hash)) {
1881: return 'ok';
1882: }
1883: }
1884: }
1885: return 'error';
1886: }
1887:
1888: # ------------------------------------------------------ Return symb list entry
1889:
1890: sub symbread {
1891: my $thisfn=shift;
1892: unless ($thisfn) {
1893: $thisfn=$ENV{'request.filename'};
1894: }
1895: $thisfn=declutter($thisfn);
1896: my %hash;
1897: my %bighash;
1898: my $syval='';
1899: if (($ENV{'request.course.fn'}) && ($thisfn)) {
1900: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1901: &GDBM_READER,0640)) {
1902: $syval=$hash{$thisfn};
1903: untie(%hash);
1904: }
1905: # ---------------------------------------------------------- There was an entry
1906: if ($syval) {
1907: unless ($syval=~/\_\d+$/) {
1908: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
1909: &appenv('request.ambiguous' => $thisfn);
1910: return '';
1911: }
1912: $syval.=$1;
1913: }
1914: } else {
1915: # ------------------------------------------------------- Was not in symb table
1916: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1917: &GDBM_READER,0640)) {
1918: # ---------------------------------------------- Get ID(s) for current resource
1919: my $ids=$bighash{'ids_/res/'.$thisfn};
1920: unless ($ids) {
1921: $ids=$bighash{'ids_/'.$thisfn};
1922: }
1923: if ($ids) {
1924: # ------------------------------------------------------------------- Has ID(s)
1925: my @possibilities=split(/\,/,$ids);
1926: if ($#possibilities==0) {
1927: # ----------------------------------------------- There is only one possibility
1928: my ($mapid,$resid)=split(/\./,$ids);
1929: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
1930: } else {
1931: # ------------------------------------------ There is more than one possibility
1932: my $realpossible=0;
1933: map {
1934: my $file=$bighash{'src_'.$_};
1935: if (&allowed('bre',$file)) {
1936: my ($mapid,$resid)=split(/\./,$_);
1937: if ($bighash{'map_type_'.$mapid} ne 'page') {
1938: $realpossible++;
1939: $syval=declutter($bighash{'map_id_'.$mapid}).
1940: '___'.$resid;
1941: }
1942: }
1943: } @possibilities;
1944: if ($realpossible!=1) { $syval=''; }
1945: }
1946: }
1947: untie(%bighash)
1948: }
1949: }
1950: if ($syval) {
1951: return $syval.'___'.$thisfn;
1952: }
1953: }
1954: &appenv('request.ambiguous' => $thisfn);
1955: return '';
1956: }
1957:
1958: # ---------------------------------------------------------- Return random seed
1959:
1960: sub numval {
1961: my $txt=shift;
1962: $txt=~tr/A-J/0-9/;
1963: $txt=~tr/a-j/0-9/;
1964: $txt=~tr/K-T/0-9/;
1965: $txt=~tr/k-t/0-9/;
1966: $txt=~tr/U-Z/0-5/;
1967: $txt=~tr/u-z/0-5/;
1968: $txt=~s/\D//g;
1969: return int($txt);
1970: }
1971:
1972: sub rndseed {
1973: my $symb;
1974: unless ($symb=&symbread()) { return time; }
1975: {
1976: use integer;
1977: my $symbchck=unpack("%32C*",$symb) << 27;
1978: my $symbseed=numval($symb) << 22;
1979: my $namechck=unpack("%32C*",$ENV{'user.name'}) << 17;
1980: my $nameseed=numval($ENV{'user.name'}) << 12;
1981: my $domainseed=unpack("%32C*",$ENV{'user.domain'}) << 7;
1982: my $courseseed=unpack("%32C*",$ENV{'request.course.id'});
1983: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
1984: #uncommenting these lines can break things!
1985: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
1986: #&Apache::lonxml::debug("rndseed :$num:$symb");
1987: return $num;
1988: }
1989: }
1990:
1991: sub ireceipt {
1992: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
1993: my $cuname=unpack("%32C*",$funame);
1994: my $cudom=unpack("%32C*",$fudom);
1995: my $cucourseid=unpack("%32C*",$fucourseid);
1996: my $cusymb=unpack("%32C*",$fusymb);
1997: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
1998: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
1999: ($cunique%$cuname+
2000: $cunique%$cudom+
2001: $cusymb%$cuname+
2002: $cusymb%$cudom+
2003: $cucourseid%$cuname+
2004: $cucourseid%$cudom);
2005: }
2006:
2007: sub receipt {
2008: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2009: $ENV{'request.course.id'},&symbread());
2010: }
2011:
2012: # ------------------------------------------------------------ Serves up a file
2013: # returns either the contents of the file or a -1
2014: sub getfile {
2015: my $file=shift;
2016: &repcopy($file);
2017: if (! -e $file ) { return -1; };
2018: my $fh=Apache::File->new($file);
2019: my $a='';
2020: while (<$fh>) { $a .=$_; }
2021: return $a
2022: }
2023:
2024: sub filelocation {
2025: my ($dir,$file) = @_;
2026: my $location;
2027: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2028: if ($file=~m:^/~:) { # is a contruction space reference
2029: $location = $file;
2030: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2031: } else {
2032: $file=~s/^$perlvar{'lonDocRoot'}//;
2033: $file=~s:^/*res::;
2034: if ( !( $file =~ m:^/:) ) {
2035: $location = $dir. '/'.$file;
2036: } else {
2037: $location = '/home/httpd/html/res'.$file;
2038: }
2039: }
2040: $location=~s://+:/:g; # remove duplicate /
2041: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2042: return $location;
2043: }
2044:
2045: sub hreflocation {
2046: my ($dir,$file)=@_;
2047: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
2048: my $finalpath=filelocation($dir,$file);
2049: $finalpath=~s/^\/home\/httpd\/html//;
2050: return $finalpath;
2051: } else {
2052: return $file;
2053: }
2054: }
2055:
2056: # ------------------------------------------------------------- Declutters URLs
2057:
2058: sub declutter {
2059: my $thisfn=shift;
2060: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2061: $thisfn=~s/^\///;
2062: $thisfn=~s/^res\///;
2063: return $thisfn;
2064: }
2065:
2066: # -------------------------------------------------------- Escape Special Chars
2067:
2068: sub escape {
2069: my $str=shift;
2070: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2071: return $str;
2072: }
2073:
2074: # ----------------------------------------------------- Un-Escape Special Chars
2075:
2076: sub unescape {
2077: my $str=shift;
2078: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2079: return $str;
2080: }
2081:
2082: # ================================================================ Main Program
2083:
2084: sub BEGIN {
2085: if ($readit ne 'done') {
2086: # ------------------------------------------------------------ Read access.conf
2087: {
2088: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2089:
2090: while (my $configline=<$config>) {
2091: if ($configline =~ /PerlSetVar/) {
2092: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2093: chomp($varvalue);
2094: $perlvar{$varname}=$varvalue;
2095: }
2096: }
2097: }
2098:
2099: # ------------------------------------------------------------- Read hosts file
2100: {
2101: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2102:
2103: while (my $configline=<$config>) {
2104: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2105: $hostname{$id}=$name;
2106: $hostdom{$id}=$domain;
2107: if ($role eq 'library') { $libserv{$id}=$name; }
2108: }
2109: }
2110:
2111: # ------------------------------------------------------ Read spare server file
2112: {
2113: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2114:
2115: while (my $configline=<$config>) {
2116: chomp($configline);
2117: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2118: $spareid{$configline}=1;
2119: }
2120: }
2121: }
2122: # ------------------------------------------------------------ Read permissions
2123: {
2124: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2125:
2126: while (my $configline=<$config>) {
2127: chomp($configline);
2128: my ($role,$perm)=split(/ /,$configline);
2129: if ($perm ne '') { $pr{$role}=$perm; }
2130: }
2131: }
2132:
2133: # -------------------------------------------- Read plain texts for permissions
2134: {
2135: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2136:
2137: while (my $configline=<$config>) {
2138: chomp($configline);
2139: my ($short,$plain)=split(/:/,$configline);
2140: if ($plain ne '') { $prp{$short}=$plain; }
2141: }
2142: }
2143:
2144: # ------------------------------------------------------------- Read file types
2145: {
2146: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2147:
2148: while (my $configline=<$config>) {
2149: chomp($configline);
2150: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2151: if ($descr[0] ne '') {
2152: $fe{$ending}=$emb;
2153: $fd{$ending}=join(' ',@descr);
2154: }
2155: }
2156: }
2157:
2158: %metacache=();
2159:
2160: $readit='done';
2161: &logthis('<font color=yellow>INFO: Read configuration</font>');
2162: }
2163: }
2164: 1;
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