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: #
44: #
45: # for the next 6 functions udom and uname are optional
46: # if supplied they use udom as the domain and uname
47: # as the username for the function (supply a courseid
48: # for the uname if you want a course database)
49: # if not supplied it uses %ENV and looks at
50: # user. attribute for the values
51: #
52: # eget(namesp,arrayref,udom,uname)
53: # : returns hash with keys from array reference filled
54: # in from namesp (encrypts the return communication)
55: # get(namesp,arrayref,udom,uname)
56: # : returns hash with keys from array reference filled
57: # in from namesp
58: # dump(namesp,udom,uname) : dumps the complete namespace into a hash
59: # del(namesp,array,udom,uname) : deletes keys out of array from namesp
60: # put(namesp,hash,udom,uname) : stores hash in namesp
61: # cput(namesp,hash,udom,uname) : critical put
62: #
63: #
64: # ssi(url,hash) : does a complete request cycle on url to localhost, posts
65: # hash
66: # coursedescription(id) : returns and caches course description for id
67: # repcopy(filename) : replicate file
68: # dirlist(url) : gets a directory listing
69: # directcondval(index) : reading condition value of single condition from
70: # state string
71: # condval(index) : value of condition index based on state
72: # EXT(name) : value of a variable
73: # symblist(map,hash) : Updates symbolic storage links
74: # symbread([filename]) : returns the data handle (filename optional)
75: # rndseed() : returns a random seed
76: # receipt() : returns a receipt to be given out to users
77: # getfile(filename) : returns the contents of filename, or a -1 if it can't
78: # be found, replicates and subscribes to the file
79: # filelocation(dir,file) : returns a fairly clean absolute reference to file
80: # from the directory dir
81: # hreflocation(dir,file) : same as filelocation, but for hrefs
82: # log(domain,user,home,msg) : write to permanent log for user
83: # usection(domain,user,courseid) : output of section name/number or '' for
84: # "not in course" and '-1' for "no section"
85: # userenvironment(domain,user,what) : puts out any environment parameter
86: # for a user
87: # idput(domain,hash) : writes IDs for users from hash (name=>id,name=>id)
88: # idget(domain,array): returns hash with usernames (id=>name,id=>name) for
89: # an array of IDs
90: # idrget(domain,array): returns hash with IDs for usernames (name=>id,...) for
91: # an array of names
92: # metadata(file,entry): returns the metadata entry for a file. entry='keys'
93: # returns a comma separated list of keys
94: #
95: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
96: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
97: # 11/8,11/16,11/18,11/22,11/23,12/22,
98: # 01/06,01/13,02/24,02/28,02/29,
99: # 03/01,03/02,03/06,03/07,03/13,
100: # 04/05,05/29,05/31,06/01,
101: # 06/05,06/26 Gerd Kortemeyer
102: # 06/26 Ben Tyszka
103: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
104: # 08/14 Ben Tyszka
105: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
106: # 10/04 Gerd Kortemeyer
107: # 10/04 Guy Albertelli
108: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
109: # 10/30,10/31,
110: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
111: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
112: # 05/01/01 Guy Albertelli
113: # 05/01,06/01,09/01 Gerd Kortemeyer
114: # 09/01 Guy Albertelli
115: # 09/01,10/01,11/01 Gerd Kortemeyer
116: # 02/27/01 Scott Harrison
117: # 3/2 Gerd Kortemeyer
118: # 3/15,3/19 Scott Harrison
119: # 3/19,3/20 Gerd Kortemeyer
120: # 3/22,3/27,4/2,4/16,4/17 Scott Harrison
121: # 5/26,5/28 Gerd Kortemeyer
122: # 5/30 H. K. Ng
123: # 6/1 Gerd Kortemeyer
124: # July Guy Albertelli
125: # 8/4,8/7,8/8 Gerd Kortemeyer
126:
127: package Apache::lonnet;
128:
129: use strict;
130: use Apache::File;
131: use LWP::UserAgent();
132: use HTTP::Headers;
133: use vars
134: qw(%perlvar %hostname %homecache %spareid %hostdom %libserv %pr %prp %fe %fd $readit %metacache %packagetab);
135: use IO::Socket;
136: use GDBM_File;
137: use Apache::Constants qw(:common :http);
138: use HTML::TokeParser;
139: use Fcntl qw(:flock);
140:
141: # --------------------------------------------------------------------- Logging
142:
143: sub logthis {
144: my $message=shift;
145: my $execdir=$perlvar{'lonDaemons'};
146: my $now=time;
147: my $local=localtime($now);
148: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
149: print $fh "$local ($$): $message\n";
150: return 1;
151: }
152:
153: sub logperm {
154: my $message=shift;
155: my $execdir=$perlvar{'lonDaemons'};
156: my $now=time;
157: my $local=localtime($now);
158: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
159: print $fh "$now:$message:$local\n";
160: return 1;
161: }
162:
163: # -------------------------------------------------- Non-critical communication
164: sub subreply {
165: my ($cmd,$server)=@_;
166: my $peerfile="$perlvar{'lonSockDir'}/$server";
167: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
168: Type => SOCK_STREAM,
169: Timeout => 10)
170: or return "con_lost";
171: print $client "$cmd\n";
172: my $answer=<$client>;
173: if (!$answer) { $answer="con_lost"; }
174: chomp($answer);
175: return $answer;
176: }
177:
178: sub reply {
179: my ($cmd,$server)=@_;
180: my $answer=subreply($cmd,$server);
181: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
182: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
183: &logthis("<font color=blue>WARNING:".
184: " $cmd to $server returned $answer</font>");
185: }
186: return $answer;
187: }
188:
189: # ----------------------------------------------------------- Send USR1 to lonc
190:
191: sub reconlonc {
192: my $peerfile=shift;
193: &logthis("Trying to reconnect for $peerfile");
194: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
195: if (my $fh=Apache::File->new("$loncfile")) {
196: my $loncpid=<$fh>;
197: chomp($loncpid);
198: if (kill 0 => $loncpid) {
199: &logthis("lonc at pid $loncpid responding, sending USR1");
200: kill USR1 => $loncpid;
201: sleep 1;
202: if (-e "$peerfile") { return; }
203: &logthis("$peerfile still not there, give it another try");
204: sleep 5;
205: if (-e "$peerfile") { return; }
206: &logthis(
207: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
208: } else {
209: &logthis(
210: "<font color=blue>WARNING:".
211: " lonc at pid $loncpid not responding, giving up</font>");
212: }
213: } else {
214: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
215: }
216: }
217:
218: # ------------------------------------------------------ Critical communication
219:
220: sub critical {
221: my ($cmd,$server)=@_;
222: unless ($hostname{$server}) {
223: &logthis("<font color=blue>WARNING:".
224: " Critical message to unknown server ($server)</font>");
225: return 'no_such_host';
226: }
227: my $answer=reply($cmd,$server);
228: if ($answer eq 'con_lost') {
229: my $pingreply=reply('ping',$server);
230: &reconlonc("$perlvar{'lonSockDir'}/$server");
231: my $pongreply=reply('pong',$server);
232: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
233: $answer=reply($cmd,$server);
234: if ($answer eq 'con_lost') {
235: my $now=time;
236: my $middlename=$cmd;
237: $middlename=substr($middlename,0,16);
238: $middlename=~s/\W//g;
239: my $dfilename=
240: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
241: {
242: my $dfh;
243: if ($dfh=Apache::File->new(">$dfilename")) {
244: print $dfh "$cmd\n";
245: }
246: }
247: sleep 2;
248: my $wcmd='';
249: {
250: my $dfh;
251: if ($dfh=Apache::File->new("$dfilename")) {
252: $wcmd=<$dfh>;
253: }
254: }
255: chomp($wcmd);
256: if ($wcmd eq $cmd) {
257: &logthis("<font color=blue>WARNING: ".
258: "Connection buffer $dfilename: $cmd</font>");
259: &logperm("D:$server:$cmd");
260: return 'con_delayed';
261: } else {
262: &logthis("<font color=red>CRITICAL:"
263: ." Critical connection failed: $server $cmd</font>");
264: &logperm("F:$server:$cmd");
265: return 'con_failed';
266: }
267: }
268: }
269: return $answer;
270: }
271:
272: # ---------------------------------------------------------- Append Environment
273:
274: sub appenv {
275: my %newenv=@_;
276: map {
277: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
278: &logthis("<font color=blue>WARNING: ".
279: "Attempt to modify environment ".$_." to ".$newenv{$_});
280: delete($newenv{$_});
281: } else {
282: $ENV{$_}=$newenv{$_};
283: }
284: } keys %newenv;
285:
286: my $lockfh;
287: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
288: return 'error: '.$!;
289: }
290: unless (flock($lockfh,LOCK_EX)) {
291: &logthis("<font color=blue>WARNING: ".
292: 'Could not obtain exclusive lock in appenv: '.$!);
293: $lockfh->close();
294: return 'error: '.$!;
295: }
296:
297: my @oldenv;
298: {
299: my $fh;
300: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
301: return 'error: '.$!;
302: }
303: @oldenv=<$fh>;
304: $fh->close();
305: }
306: for (my $i=0; $i<=$#oldenv; $i++) {
307: chomp($oldenv[$i]);
308: if ($oldenv[$i] ne '') {
309: my ($name,$value)=split(/=/,$oldenv[$i]);
310: unless (defined($newenv{$name})) {
311: $newenv{$name}=$value;
312: }
313: }
314: }
315: {
316: my $fh;
317: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
318: return 'error';
319: }
320: my $newname;
321: foreach $newname (keys %newenv) {
322: print $fh "$newname=$newenv{$newname}\n";
323: }
324: $fh->close();
325: }
326:
327: $lockfh->close();
328: return 'ok';
329: }
330: # ----------------------------------------------------- Delete from Environment
331:
332: sub delenv {
333: my $delthis=shift;
334: my %newenv=();
335: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
336: &logthis("<font color=blue>WARNING: ".
337: "Attempt to delete from environment ".$delthis);
338: return 'error';
339: }
340: my @oldenv;
341: {
342: my $fh;
343: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
344: return 'error';
345: }
346: unless (flock($fh,LOCK_SH)) {
347: &logthis("<font color=blue>WARNING: ".
348: 'Could not obtain shared lock in delenv: '.$!);
349: $fh->close();
350: return 'error: '.$!;
351: }
352: @oldenv=<$fh>;
353: $fh->close();
354: }
355: {
356: my $fh;
357: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
358: return 'error';
359: }
360: unless (flock($fh,LOCK_EX)) {
361: &logthis("<font color=blue>WARNING: ".
362: 'Could not obtain exclusive lock in delenv: '.$!);
363: $fh->close();
364: return 'error: '.$!;
365: }
366: map {
367: unless ($_=~/^$delthis/) { print $fh $_; }
368: } @oldenv;
369: $fh->close();
370: }
371: return 'ok';
372: }
373:
374: # ------------------------------ Find server with least workload from spare.tab
375:
376: sub spareserver {
377: my $tryserver;
378: my $spareserver='';
379: my $lowestserver=100;
380: foreach $tryserver (keys %spareid) {
381: my $answer=reply('load',$tryserver);
382: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
383: $spareserver="http://$hostname{$tryserver}";
384: $lowestserver=$answer;
385: }
386: }
387: return $spareserver;
388: }
389:
390: # --------- Try to authenticate user from domain's lib servers (first this one)
391:
392: sub authenticate {
393: my ($uname,$upass,$udom)=@_;
394: $upass=escape($upass);
395: if (($perlvar{'lonRole'} eq 'library') &&
396: ($udom eq $perlvar{'lonDefDomain'})) {
397: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
398: if ($answer =~ /authorized/) {
399: if ($answer eq 'authorized') {
400: &logthis("User $uname at $udom authorized by local server");
401: return $perlvar{'lonHostID'};
402: }
403: if ($answer eq 'non_authorized') {
404: &logthis("User $uname at $udom rejected by local server");
405: return 'no_host';
406: }
407: }
408: }
409:
410: my $tryserver;
411: foreach $tryserver (keys %libserv) {
412: if ($hostdom{$tryserver} eq $udom) {
413: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
414: if ($answer =~ /authorized/) {
415: if ($answer eq 'authorized') {
416: &logthis("User $uname at $udom authorized by $tryserver");
417: return $tryserver;
418: }
419: if ($answer eq 'non_authorized') {
420: &logthis("User $uname at $udom rejected by $tryserver");
421: return 'no_host';
422: }
423: }
424: }
425: }
426: &logthis("User $uname at $udom could not be authenticated");
427: return 'no_host';
428: }
429:
430: # ---------------------- Find the homebase for a user from domain's lib servers
431:
432: sub homeserver {
433: my ($uname,$udom)=@_;
434:
435: my $index="$uname:$udom";
436: if ($homecache{$index}) { return "$homecache{$index}"; }
437:
438: my $tryserver;
439: foreach $tryserver (keys %libserv) {
440: if ($hostdom{$tryserver} eq $udom) {
441: my $answer=reply("home:$udom:$uname",$tryserver);
442: if ($answer eq 'found') {
443: $homecache{$index}=$tryserver;
444: return $tryserver;
445: }
446: }
447: }
448: return 'no_host';
449: }
450:
451: # ------------------------------------- Find the usernames behind a list of IDs
452:
453: sub idget {
454: my ($udom,@ids)=@_;
455: my %returnhash=();
456:
457: my $tryserver;
458: foreach $tryserver (keys %libserv) {
459: if ($hostdom{$tryserver} eq $udom) {
460: my $idlist=join('&',@ids);
461: $idlist=~tr/A-Z/a-z/;
462: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
463: my @answer=();
464: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
465: @answer=split(/\&/,$reply);
466: } ;
467: my $i;
468: for ($i=0;$i<=$#ids;$i++) {
469: if ($answer[$i]) {
470: $returnhash{$ids[$i]}=$answer[$i];
471: }
472: }
473: }
474: }
475: return %returnhash;
476: }
477:
478: # ------------------------------------- Find the IDs behind a list of usernames
479:
480: sub idrget {
481: my ($udom,@unames)=@_;
482: my %returnhash=();
483: map {
484: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
485: } @unames;
486: return %returnhash;
487: }
488:
489: # ------------------------------- Store away a list of names and associated IDs
490:
491: sub idput {
492: my ($udom,%ids)=@_;
493: my %servers=();
494: map {
495: my $uhom=&homeserver($_,$udom);
496: if ($uhom ne 'no_host') {
497: my $id=&escape($ids{$_});
498: $id=~tr/A-Z/a-z/;
499: my $unam=&escape($_);
500: if ($servers{$uhom}) {
501: $servers{$uhom}.='&'.$id.'='.$unam;
502: } else {
503: $servers{$uhom}=$id.'='.$unam;
504: }
505: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
506: }
507: } keys %ids;
508: map {
509: &critical('idput:'.$udom.':'.$servers{$_},$_);
510: } keys %servers;
511: }
512:
513: # ------------------------------------- Find the section of student in a course
514:
515: sub usection {
516: my ($udom,$unam,$courseid)=@_;
517: $courseid=~s/\_/\//g;
518: $courseid=~s/^(\w)/\/$1/;
519: map {
520: my ($key,$value)=split(/\=/,$_);
521: $key=&unescape($key);
522: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
523: my $section=$1;
524: if ($key eq $courseid.'_st') { $section=''; }
525: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
526: my $now=time;
527: my $notactive=0;
528: if ($start) {
529: if ($now<$start) { $notactive=1; }
530: }
531: if ($end) {
532: if ($now>$end) { $notactive=1; }
533: }
534: unless ($notactive) { return $section; }
535: }
536: } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
537: &homeserver($unam,$udom)));
538: return '-1';
539: }
540:
541: # ------------------------------------- Read an entry from a user's environment
542:
543: sub userenvironment {
544: my ($udom,$unam,@what)=@_;
545: my %returnhash=();
546: my @answer=split(/\&/,
547: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
548: &homeserver($unam,$udom)));
549: my $i;
550: for ($i=0;$i<=$#what;$i++) {
551: $returnhash{$what[$i]}=&unescape($answer[$i]);
552: }
553: return %returnhash;
554: }
555:
556: # ----------------------------- Subscribe to a resource, return URL if possible
557:
558: sub subscribe {
559: my $fname=shift;
560: my $author=$fname;
561: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
562: my ($udom,$uname)=split(/\//,$author);
563: my $home=homeserver($uname,$udom);
564: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
565: return 'not_found';
566: }
567: my $answer=reply("sub:$fname",$home);
568: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
569: $answer.=' by '.$home;
570: }
571: return $answer;
572: }
573:
574: # -------------------------------------------------------------- Replicate file
575:
576: sub repcopy {
577: my $filename=shift;
578: $filename=~s/\/+/\//g;
579: my $transname="$filename.in.transfer";
580: if ((-e $filename) || (-e $transname)) { return OK; }
581: my $remoteurl=subscribe($filename);
582: if ($remoteurl =~ /^con_lost by/) {
583: &logthis("Subscribe returned $remoteurl: $filename");
584: return HTTP_SERVICE_UNAVAILABLE;
585: } elsif ($remoteurl eq 'not_found') {
586: &logthis("Subscribe returned not_found: $filename");
587: return HTTP_NOT_FOUND;
588: } elsif ($remoteurl =~ /^rejected by/) {
589: &logthis("Subscribe returned $remoteurl: $filename");
590: return FORBIDDEN;
591: } elsif ($remoteurl eq 'directory') {
592: return OK;
593: } else {
594: my @parts=split(/\//,$filename);
595: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
596: if ($path ne "$perlvar{'lonDocRoot'}/res") {
597: &logthis("Malconfiguration for replication: $filename");
598: return HTTP_BAD_REQUEST;
599: }
600: my $count;
601: for ($count=5;$count<$#parts;$count++) {
602: $path.="/$parts[$count]";
603: if ((-e $path)!=1) {
604: mkdir($path,0777);
605: }
606: }
607: my $ua=new LWP::UserAgent;
608: my $request=new HTTP::Request('GET',"$remoteurl");
609: my $response=$ua->request($request,$transname);
610: if ($response->is_error()) {
611: unlink($transname);
612: my $message=$response->status_line;
613: &logthis("<font color=blue>WARNING:"
614: ." LWP get: $message: $filename</font>");
615: return HTTP_SERVICE_UNAVAILABLE;
616: } else {
617: if ($remoteurl!~/\.meta$/) {
618: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
619: my $mresponse=$ua->request($mrequest,$filename.'.meta');
620: if ($mresponse->is_error()) {
621: unlink($filename.'.meta');
622: &logthis(
623: "<font color=yellow>INFO: No metadata: $filename</font>");
624: }
625: }
626: rename($transname,$filename);
627: return OK;
628: }
629: }
630: }
631:
632: # --------------------------------------------------------- Server Side Include
633:
634: sub ssi {
635:
636: my ($fn,%form)=@_;
637:
638: my $ua=new LWP::UserAgent;
639:
640: my $request;
641:
642: if (%form) {
643: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
644: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
645: } else {
646: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
647: }
648:
649: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
650: my $response=$ua->request($request);
651:
652: return $response->content;
653: }
654:
655: # ------------------------------------------------------------------------- Log
656:
657: sub log {
658: my ($dom,$nam,$hom,$what)=@_;
659: return critical("log:$dom:$nam:$what",$hom);
660: }
661:
662: # --------------------------------------------- Set Expire Date for Spreadsheet
663:
664: sub expirespread {
665: my ($uname,$udom,$stype,$usymb)=@_;
666: my $cid=$ENV{'request.course.id'};
667: if ($cid) {
668: my $now=time;
669: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
670: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
671: $ENV{'course.'.$cid.'.num'}.
672: ':nohist_expirationdates:'.
673: &escape($key).'='.$now,
674: $ENV{'course.'.$cid.'.home'})
675: }
676: return 'ok';
677: }
678:
679: # ----------------------------------------------------- Devalidate Spreadsheets
680:
681: sub devalidate {
682: my $symb=shift;
683: my $cid=$ENV{'request.course.id'};
684: if ($cid) {
685: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
686: my $status=
687: &del('nohist_calculatedsheet',
688: [$key.'studentcalc'],
689: $ENV{'course.'.$cid.'.domain'},
690: $ENV{'course.'.$cid.'.num'})
691: .' '.
692: &del('nohist_calculatedsheets_'.$cid,
693: [$key.'assesscalc:'.$symb]);
694: unless ($status eq 'ok ok') {
695: &logthis('Could not devalidate spreadsheet '.
696: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
697: $symb.': '.$status);
698: }
699: }
700: }
701:
702: # ----------------------------------------------------------------------- Store
703:
704: sub store {
705: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
706: my $home='';
707:
708: if ($stuname) {
709: $home=&homeserver($stuname,$domain);
710: }
711:
712: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
713:
714: &devalidate($symb);
715:
716: $symb=escape($symb);
717: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
718: if (!$domain) { $domain=$ENV{'user.domain'}; }
719: if (!$stuname) { $stuname=$ENV{'user.name'}; }
720: if (!$home) { $home=$ENV{'user.home'}; }
721: my $namevalue='';
722: map {
723: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
724: } keys %$storehash;
725: $namevalue=~s/\&$//;
726: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
727: }
728:
729: # -------------------------------------------------------------- Critical Store
730:
731: sub cstore {
732: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
733: my $home='';
734:
735: if ($stuname) {
736: $home=&homeserver($stuname,$domain);
737: }
738:
739: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
740:
741: &devalidate($symb);
742:
743: $symb=escape($symb);
744: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
745: if (!$domain) { $domain=$ENV{'user.domain'}; }
746: if (!$stuname) { $stuname=$ENV{'user.name'}; }
747: if (!$home) { $home=$ENV{'user.home'}; }
748:
749: my $namevalue='';
750: map {
751: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
752: } keys %$storehash;
753: $namevalue=~s/\&$//;
754: return critical("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
755: }
756:
757: # --------------------------------------------------------------------- Restore
758:
759: sub restore {
760: my ($symb,$namespace,$domain,$stuname) = @_;
761: my $home='';
762:
763: if ($stuname) {
764: $home=&homeserver($stuname,$domain);
765: }
766:
767: if (!$symb) {
768: unless ($symb=escape(&symbread())) { return ''; }
769: } else {
770: $symb=&escape($symb);
771: }
772: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
773: if (!$domain) { $domain=$ENV{'user.domain'}; }
774: if (!$stuname) { $stuname=$ENV{'user.name'}; }
775: if (!$home) { $home=$ENV{'user.home'}; }
776: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
777:
778: my %returnhash=();
779: map {
780: my ($name,$value)=split(/\=/,$_);
781: $returnhash{&unescape($name)}=&unescape($value);
782: } split(/\&/,$answer);
783: my $version;
784: for ($version=1;$version<=$returnhash{'version'};$version++) {
785: map {
786: $returnhash{$_}=$returnhash{$version.':'.$_};
787: } split(/\:/,$returnhash{$version.':keys'});
788: }
789: return %returnhash;
790: }
791:
792: # ---------------------------------------------------------- Course Description
793:
794: sub coursedescription {
795: my $courseid=shift;
796: $courseid=~s/^\///;
797: $courseid=~s/\_/\//g;
798: my ($cdomain,$cnum)=split(/\//,$courseid);
799: my $chome=&homeserver($cnum,$cdomain);
800: if ($chome ne 'no_host') {
801: my %returnhash=&dump('environment',$cdomain,$cnum);
802: if (!exists($returnhash{'con_lost'})) {
803: my $normalid=$cdomain.'_'.$cnum;
804: my %envhash=();
805: $returnhash{'home'}= $chome;
806: $returnhash{'domain'} = $cdomain;
807: $returnhash{'num'} = $cnum;
808: while (my ($name,$value) = each %returnhash) {
809: $envhash{'course.'.$normalid.'.'.$name}=$value;
810: }
811: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
812: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
813: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
814: $envhash{'course.'.$normalid.'.last_cache'}=time;
815: $envhash{'course.'.$normalid.'.home'}=$chome;
816: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
817: $envhash{'course.'.$normalid.'.num'}=$cnum;
818: &appenv(%envhash);
819: return %returnhash;
820: }
821: }
822: return ();
823: }
824:
825: # -------------------------------------------------------- Get user privileges
826:
827: sub rolesinit {
828: my ($domain,$username,$authhost)=@_;
829: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
830: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
831: my %allroles=();
832: my %thesepriv=();
833: my $now=time;
834: my $userroles="user.login.time=$now\n";
835: my $thesestr;
836:
837: if ($rolesdump ne '') {
838: map {
839: if ($_!~/^rolesdef\&/) {
840: my ($area,$role)=split(/=/,$_);
841: $area=~s/\_\w\w$//;
842: my ($trole,$tend,$tstart)=split(/_/,$role);
843: $userroles.='user.role.'.$trole.'.'.$area.'='.
844: $tstart.'.'.$tend."\n";
845: if ($tend!=0) {
846: if ($tend<$now) {
847: $trole='';
848: }
849: }
850: if ($tstart!=0) {
851: if ($tstart>$now) {
852: $trole='';
853: }
854: }
855: if (($area ne '') && ($trole ne '')) {
856: my $spec=$trole.'.'.$area;
857: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
858: if ($trole =~ /^cr\//) {
859: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
860: my $homsvr=homeserver($rauthor,$rdomain);
861: if ($hostname{$homsvr} ne '') {
862: my $roledef=
863: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
864: $homsvr);
865: if (($roledef ne 'con_lost') && ($roledef ne '')) {
866: my ($syspriv,$dompriv,$coursepriv)=
867: split(/\_/,unescape($roledef));
868: $allroles{'cm./'}.=':'.$syspriv;
869: $allroles{$spec.'./'}.=':'.$syspriv;
870: if ($tdomain ne '') {
871: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
872: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
873: if ($trest ne '') {
874: $allroles{'cm.'.$area}.=':'.$coursepriv;
875: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
876: }
877: }
878: }
879: }
880: } else {
881: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
882: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
883: if ($tdomain ne '') {
884: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
885: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
886: if ($trest ne '') {
887: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
888: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
889: }
890: }
891: }
892: }
893: }
894: } split(/&/,$rolesdump);
895: my $adv=0;
896: my $author=0;
897: map {
898: %thesepriv=();
899: if (($_!~/^st/) && ($_!~/^ta/)) { $adv=1; }
900: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
901: map {
902: if ($_ ne '') {
903: my ($privilege,$restrictions)=split(/&/,$_);
904: if ($restrictions eq '') {
905: $thesepriv{$privilege}='F';
906: } else {
907: if ($thesepriv{$privilege} ne 'F') {
908: $thesepriv{$privilege}.=$restrictions;
909: }
910: }
911: }
912: } split(/:/,$allroles{$_});
913: $thesestr='';
914: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
915: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
916: } keys %allroles;
917: $userroles.='user.adv='.$adv."\n".
918: 'user.author='.$author."\n";
919: $ENV{'user.adv'}=$adv;
920: }
921: return $userroles;
922: }
923:
924: # --------------------------------------------------------------- get interface
925:
926: sub get {
927: my ($namespace,$storearr,$udomain,$uname)=@_;
928: my $items='';
929: map {
930: $items.=escape($_).'&';
931: } @$storearr;
932: $items=~s/\&$//;
933: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
934: if (!$uname) { $uname=$ENV{'user.name'}; }
935: my $uhome=&homeserver($uname,$udomain);
936:
937: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
938: my @pairs=split(/\&/,$rep);
939: my %returnhash=();
940: my $i=0;
941: map {
942: $returnhash{$_}=unescape($pairs[$i]);
943: $i++;
944: } @$storearr;
945: return %returnhash;
946: }
947:
948: # --------------------------------------------------------------- del interface
949:
950: sub del {
951: my ($namespace,$storearr,$udomain,$uname)=@_;
952: my $items='';
953: map {
954: $items.=escape($_).'&';
955: } @$storearr;
956: $items=~s/\&$//;
957: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
958: if (!$uname) { $uname=$ENV{'user.name'}; }
959: my $uhome=&homeserver($uname,$udomain);
960:
961: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
962: }
963:
964: # -------------------------------------------------------------- dump interface
965:
966: sub dump {
967: my ($namespace,$udomain,$uname)=@_;
968: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
969: if (!$uname) { $uname=$ENV{'user.name'}; }
970: my $uhome=&homeserver($uname,$udomain);
971: my $rep=reply("dump:$udomain:$uname:$namespace",$uhome);
972: my @pairs=split(/\&/,$rep);
973: my %returnhash=();
974: map {
975: my ($key,$value)=split(/=/,$_);
976: $returnhash{unescape($key)}=unescape($value);
977: } @pairs;
978: return %returnhash;
979: }
980:
981: # --------------------------------------------------------------- put interface
982:
983: sub put {
984: my ($namespace,$storehash,$udomain,$uname)=@_;
985: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
986: if (!$uname) { $uname=$ENV{'user.name'}; }
987: my $uhome=&homeserver($uname,$udomain);
988: my $items='';
989: map {
990: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
991: } keys %$storehash;
992: $items=~s/\&$//;
993: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
994: }
995:
996: # ------------------------------------------------------ critical put interface
997:
998: sub cput {
999: my ($namespace,$storehash,$udomain,$uname)=@_;
1000: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1001: if (!$uname) { $uname=$ENV{'user.name'}; }
1002: my $uhome=&homeserver($uname,$udomain);
1003: my $items='';
1004: map {
1005: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1006: } keys %$storehash;
1007: $items=~s/\&$//;
1008: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1009: }
1010:
1011: # -------------------------------------------------------------- eget interface
1012:
1013: sub eget {
1014: my ($namespace,$storearr,$udomain,$uname)=@_;
1015: my $items='';
1016: map {
1017: $items.=escape($_).'&';
1018: } @$storearr;
1019: $items=~s/\&$//;
1020: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1021: if (!$uname) { $uname=$ENV{'user.name'}; }
1022: my $uhome=&homeserver($uname,$udomain);
1023: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1024: my @pairs=split(/\&/,$rep);
1025: my %returnhash=();
1026: my $i=0;
1027: map {
1028: $returnhash{$_}=unescape($pairs[$i]);
1029: $i++;
1030: } @$storearr;
1031: return %returnhash;
1032: }
1033:
1034: # ------------------------------------------------- Check for a user privilege
1035:
1036: sub allowed {
1037: my ($priv,$uri)=@_;
1038: $uri=&declutter($uri);
1039:
1040: # Free bre access to adm and meta resources
1041:
1042: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1043: return 'F';
1044: }
1045:
1046: my $thisallowed='';
1047: my $statecond=0;
1048: my $courseprivid='';
1049:
1050: # Course
1051:
1052: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1053: $thisallowed.=$1;
1054: }
1055:
1056: # Domain
1057:
1058: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1059: =~/$priv\&([^\:]*)/) {
1060: $thisallowed.=$1;
1061: }
1062:
1063: # Course: uri itself is a course
1064: my $courseuri=$uri;
1065: $courseuri=~s/\_(\d)/\/$1/;
1066: $courseuri=~s/^([^\/])/\/$1/;
1067:
1068: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1069: =~/$priv\&([^\:]*)/) {
1070: $thisallowed.=$1;
1071: }
1072:
1073: # Full access at system, domain or course-wide level? Exit.
1074:
1075: if ($thisallowed=~/F/) {
1076: return 'F';
1077: }
1078:
1079: # If this is generating or modifying users, exit with special codes
1080:
1081: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:'=~/\:$priv\:/) {
1082: return $thisallowed;
1083: }
1084: #
1085: # Gathered so far: system, domain and course wide privileges
1086: #
1087: # Course: See if uri or referer is an individual resource that is part of
1088: # the course
1089:
1090: if ($ENV{'request.course.id'}) {
1091: $courseprivid=$ENV{'request.course.id'};
1092: if ($ENV{'request.course.sec'}) {
1093: $courseprivid.='/'.$ENV{'request.course.sec'};
1094: }
1095: $courseprivid=~s/\_/\//;
1096: my $checkreferer=1;
1097: my @uriparts=split(/\//,$uri);
1098: my $filename=$uriparts[$#uriparts];
1099: my $pathname=$uri;
1100: $pathname=~s/\/$filename$//;
1101: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1102: /\&$filename\:([\d\|]+)\&/) {
1103: $statecond=$1;
1104: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1105: =~/$priv\&([^\:]*)/) {
1106: $thisallowed.=$1;
1107: $checkreferer=0;
1108: }
1109: }
1110:
1111: if (($ENV{'HTTP_REFERER'}) && ($checkreferer)) {
1112: my $refuri=$ENV{'HTTP_REFERER'};
1113: $refuri=~s/^http\:\/\/$ENV{'request.host'}//i;
1114: $refuri=&declutter($refuri);
1115: my @uriparts=split(/\//,$refuri);
1116: my $filename=$uriparts[$#uriparts];
1117: my $pathname=$refuri;
1118: $pathname=~s/\/$filename$//;
1119: my @filenameparts=split(/\./,$uri);
1120: if (&fileembstyle($filenameparts[$#filenameparts]) ne 'ssi') {
1121: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1122: /\&$filename\:([\d\|]+)\&/) {
1123: my $refstatecond=$1;
1124: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1125: =~/$priv\&([^\:]*)/) {
1126: $thisallowed.=$1;
1127: $uri=$refuri;
1128: $statecond=$refstatecond;
1129: }
1130: }
1131: }
1132: }
1133: }
1134:
1135: #
1136: # Gathered now: all privileges that could apply, and condition number
1137: #
1138: #
1139: # Full or no access?
1140: #
1141:
1142: if ($thisallowed=~/F/) {
1143: return 'F';
1144: }
1145:
1146: unless ($thisallowed) {
1147: return '';
1148: }
1149:
1150: # Restrictions exist, deal with them
1151: #
1152: # C:according to course preferences
1153: # R:according to resource settings
1154: # L:unless locked
1155: # X:according to user session state
1156: #
1157:
1158: # Possibly locked functionality, check all courses
1159: # Locks might take effect only after 10 minutes cache expiration for other
1160: # courses, and 2 minutes for current course
1161:
1162: my $envkey;
1163: if ($thisallowed=~/L/) {
1164: foreach $envkey (keys %ENV) {
1165: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1166: my $courseid=$2;
1167: my $roleid=$1.'.'.$2;
1168: $courseid=~s/^\///;
1169: my $expiretime=600;
1170: if ($ENV{'request.role'} eq $roleid) {
1171: $expiretime=120;
1172: }
1173: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1174: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1175: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1176: &coursedescription($courseid);
1177: }
1178: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1179: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1180: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1181: &log($ENV{'user.domain'},$ENV{'user.name'},
1182: $ENV{'user.host'},
1183: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1184: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1185: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1186: return '';
1187: }
1188: }
1189: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1190: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1191: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1192: &log($ENV{'user.domain'},$ENV{'user.name'},
1193: $ENV{'user.host'},
1194: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1195: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1196: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1197: return '';
1198: }
1199: }
1200: }
1201: }
1202: }
1203:
1204: #
1205: # Rest of the restrictions depend on selected course
1206: #
1207:
1208: unless ($ENV{'request.course.id'}) {
1209: return '1';
1210: }
1211:
1212: #
1213: # Now user is definitely in a course
1214: #
1215:
1216:
1217: # Course preferences
1218:
1219: if ($thisallowed=~/C/) {
1220: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1221: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1222: =~/\,$rolecode\,/) {
1223: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1224: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1225: $ENV{'request.course.id'});
1226: return '';
1227: }
1228: }
1229:
1230: # Resource preferences
1231:
1232: if ($thisallowed=~/R/) {
1233: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1234: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1235: if (-e $filename) {
1236: my @content;
1237: {
1238: my $fh=Apache::File->new($filename);
1239: @content=<$fh>;
1240: }
1241: if (join('',@content)=~
1242: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1243: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1244: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1245: return '';
1246:
1247: }
1248: }
1249: }
1250:
1251: # Restricted by state?
1252:
1253: if ($thisallowed=~/X/) {
1254: if (&condval($statecond)) {
1255: return '2';
1256: } else {
1257: return '';
1258: }
1259: }
1260:
1261: return 'F';
1262: }
1263:
1264: # ----------------------------------------------------------------- Define Role
1265:
1266: sub definerole {
1267: if (allowed('mcr','/')) {
1268: my ($rolename,$sysrole,$domrole,$courole)=@_;
1269: map {
1270: my ($crole,$cqual)=split(/\&/,$_);
1271: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1272: if ($pr{'cr:s'}=~/$crole\&/) {
1273: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1274: return "refused:s:$crole&$cqual";
1275: }
1276: }
1277: } split('/',$sysrole);
1278: map {
1279: my ($crole,$cqual)=split(/\&/,$_);
1280: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1281: if ($pr{'cr:d'}=~/$crole\&/) {
1282: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1283: return "refused:d:$crole&$cqual";
1284: }
1285: }
1286: } split('/',$domrole);
1287: map {
1288: my ($crole,$cqual)=split(/\&/,$_);
1289: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1290: if ($pr{'cr:c'}=~/$crole\&/) {
1291: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1292: return "refused:c:$crole&$cqual";
1293: }
1294: }
1295: } split('/',$courole);
1296: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1297: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1298: "rolesdef_$rolename=".
1299: escape($sysrole.'_'.$domrole.'_'.$courole);
1300: return reply($command,$ENV{'user.home'});
1301: } else {
1302: return 'refused';
1303: }
1304: }
1305:
1306: # ---------------- Make a metadata query against the network of library servers
1307:
1308: sub metadata_query {
1309: my ($query,$custom,$customshow)=@_;
1310: # need to put in a library server loop here and return a hash
1311: my %rhash;
1312: for my $server (keys %libserv) {
1313: unless ($custom or $customshow) {
1314: my $reply=&reply("querysend:".&escape($query),$server);
1315: $rhash{$server}=$reply;
1316: }
1317: else {
1318: my $reply=&reply("querysend:".&escape($query).':'.
1319: &escape($custom).':'.&escape($customshow),
1320: $server);
1321: $rhash{$server}=$reply;
1322: }
1323: }
1324: return \%rhash;
1325: }
1326:
1327: # ------------------------------------------------------------------ Plain Text
1328:
1329: sub plaintext {
1330: my $short=shift;
1331: return $prp{$short};
1332: }
1333:
1334: # ------------------------------------------------------------------ Plain Text
1335:
1336: sub fileembstyle {
1337: my $ending=shift;
1338: return $fe{$ending};
1339: }
1340:
1341: # ------------------------------------------------------------ Description Text
1342:
1343: sub filedescription {
1344: my $ending=shift;
1345: return $fd{$ending};
1346: }
1347:
1348: # ----------------------------------------------------------------- Assign Role
1349:
1350: sub assignrole {
1351: my ($udom,$uname,$url,$role,$end,$start)=@_;
1352: my $mrole;
1353: if ($role =~ /^cr\//) {
1354: unless (&allowed('ccr',$url)) {
1355: &logthis('Refused custom assignrole: '.
1356: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1357: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1358: return 'refused';
1359: }
1360: $mrole='cr';
1361: } else {
1362: my $cwosec=$url;
1363: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1364: unless (&allowed('c'.$role,$cwosec)) {
1365: &logthis('Refused assignrole: '.
1366: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1367: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1368: return 'refused';
1369: }
1370: $mrole=$role;
1371: }
1372: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1373: "$udom:$uname:$url".'_'."$mrole=$role";
1374: if ($end) { $command.='_'.$end; }
1375: if ($start) {
1376: if ($end) {
1377: $command.='_'.$start;
1378: } else {
1379: $command.='_0_'.$start;
1380: }
1381: }
1382: return &reply($command,&homeserver($uname,$udom));
1383: }
1384:
1385: # --------------------------------------------------------------- Modify a user
1386:
1387:
1388: sub modifyuser {
1389: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1390: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1391: $umode.', '.$first.', '.$middle.', '.
1392: $last.', '.$gene.' by '.
1393: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1394: my $uhome=&homeserver($uname,$udom);
1395: # ----------------------------------------------------------------- Create User
1396: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1397: my $unhome='';
1398: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1399: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1400: } else {
1401: my $tryserver;
1402: my $loadm=10000000;
1403: foreach $tryserver (keys %libserv) {
1404: if ($hostdom{$tryserver} eq $udom) {
1405: my $answer=reply('load',$tryserver);
1406: if (($answer=~/\d+/) && ($answer<$loadm)) {
1407: $loadm=$answer;
1408: $unhome=$tryserver;
1409: }
1410: }
1411: }
1412: }
1413: if (($unhome eq '') || ($unhome eq 'no_host')) {
1414: return 'error: find home';
1415: }
1416: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1417: &escape($upass),$unhome);
1418: unless ($reply eq 'ok') {
1419: return 'error: '.$reply;
1420: }
1421: $uhome=&homeserver($uname,$udom);
1422: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1423: return 'error: verify home';
1424: }
1425: }
1426: # ---------------------------------------------------------------------- Add ID
1427: if ($uid) {
1428: $uid=~tr/A-Z/a-z/;
1429: my %uidhash=&idrget($udom,$uname);
1430: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1431: unless ($uid eq $uidhash{$uname}) {
1432: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1433: }
1434: } else {
1435: &idput($udom,($uname => $uid));
1436: }
1437: }
1438: # -------------------------------------------------------------- Add names, etc
1439: my %names=&get('environment',
1440: ['firstname','middlename','lastname','generation'],
1441: $udom,$uname);
1442: if ($first) { $names{'firstname'} = $first; }
1443: if ($middle) { $names{'middlename'} = $middle; }
1444: if ($last) { $names{'lastname'} = $last; }
1445: if ($gene) { $names{'generation'} = $gene; }
1446: my $reply = &put('environment', \%names, $udom,$uname);
1447: if ($reply ne 'ok') { return 'error: '.$reply; }
1448: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1449: $umode.', '.$first.', '.$middle.', '.
1450: $last.', '.$gene.' by '.
1451: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1452: return 'ok';
1453: }
1454:
1455: # -------------------------------------------------------------- Modify student
1456:
1457: sub modifystudent {
1458: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1459: $end,$start)=@_;
1460: my $cid='';
1461: unless ($cid=$ENV{'request.course.id'}) {
1462: return 'not_in_class';
1463: }
1464: # --------------------------------------------------------------- Make the user
1465: my $reply=&modifyuser
1466: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1467: unless ($reply eq 'ok') { return $reply; }
1468: my $uhome=&homeserver($uname,$udom);
1469: if (($uhome eq '') || ($uhome eq 'no_host')) {
1470: return 'error: no such user';
1471: }
1472: # -------------------------------------------------- Add student to course list
1473: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1474: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1475: &escape($uname.':'.$udom).'='.
1476: &escape($end.':'.$start),
1477: $ENV{'course.'.$cid.'.home'});
1478: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1479: return 'error: '.$reply;
1480: }
1481: # ---------------------------------------------------- Add student role to user
1482: my $uurl='/'.$cid;
1483: $uurl=~s/\_/\//g;
1484: if ($usec) {
1485: $uurl.='/'.$usec;
1486: }
1487: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1488: }
1489:
1490: # ------------------------------------------------- Write to course preferences
1491:
1492: sub writecoursepref {
1493: my ($courseid,%prefs)=@_;
1494: $courseid=~s/^\///;
1495: $courseid=~s/\_/\//g;
1496: my ($cdomain,$cnum)=split(/\//,$courseid);
1497: my $chome=homeserver($cnum,$cdomain);
1498: if (($chome eq '') || ($chome eq 'no_host')) {
1499: return 'error: no such course';
1500: }
1501: my $cstring='';
1502: map {
1503: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1504: } keys %prefs;
1505: $cstring=~s/\&$//;
1506: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1507: }
1508:
1509: # ---------------------------------------------------------- Make/modify course
1510:
1511: sub createcourse {
1512: my ($udom,$description,$url)=@_;
1513: $url=&declutter($url);
1514: my $cid='';
1515: unless (&allowed('ccc',$ENV{'user.domain'})) {
1516: return 'refused';
1517: }
1518: unless ($udom eq $ENV{'user.domain'}) {
1519: return 'refused';
1520: }
1521: # ------------------------------------------------------------------- Create ID
1522: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1523: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1524: # ----------------------------------------------- Make sure that does not exist
1525: my $uhome=&homeserver($uname,$udom);
1526: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1527: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1528: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1529: $uhome=&homeserver($uname,$udom);
1530: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1531: return 'error: unable to generate unique course-ID';
1532: }
1533: }
1534: # ------------------------------------------------------------- Make the course
1535: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1536: $ENV{'user.home'});
1537: unless ($reply eq 'ok') { return 'error: '.$reply; }
1538: my $uhome=&homeserver($uname,$udom);
1539: if (($uhome eq '') || ($uhome eq 'no_host')) {
1540: return 'error: no such course';
1541: }
1542: &writecoursepref($udom.'_'.$uname,
1543: ('description' => $description,
1544: 'url' => $url));
1545: return '/'.$udom.'/'.$uname;
1546: }
1547:
1548: # ---------------------------------------------------------- Assign Custom Role
1549:
1550: sub assigncustomrole {
1551: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1552: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1553: $end,$start);
1554: }
1555:
1556: # ----------------------------------------------------------------- Revoke Role
1557:
1558: sub revokerole {
1559: my ($udom,$uname,$url,$role)=@_;
1560: my $now=time;
1561: return &assignrole($udom,$uname,$url,$role,$now);
1562: }
1563:
1564: # ---------------------------------------------------------- Revoke Custom Role
1565:
1566: sub revokecustomrole {
1567: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1568: my $now=time;
1569: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1570: }
1571:
1572: # ------------------------------------------------------------ Directory lister
1573:
1574: sub dirlist {
1575: my $uri=shift;
1576: $uri=~s/^\///;
1577: $uri=~s/\/$//;
1578: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1579: if ($udom) {
1580: if ($uname) {
1581: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1582: homeserver($uname,$udom));
1583: return split(/:/,$listing);
1584: } else {
1585: my $tryserver;
1586: my %allusers=();
1587: foreach $tryserver (keys %libserv) {
1588: if ($hostdom{$tryserver} eq $udom) {
1589: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1590: $tryserver);
1591: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1592: && ($listing ne 'con_lost')) {
1593: map {
1594: my ($entry,@stat)=split(/&/,$_);
1595: $allusers{$entry}=1;
1596: } split(/:/,$listing);
1597: }
1598: }
1599: }
1600: my $alluserstr='';
1601: map {
1602: $alluserstr.=$_.'&user:';
1603: } sort keys %allusers;
1604: $alluserstr=~s/:$//;
1605: return split(/:/,$alluserstr);
1606: }
1607: } else {
1608: my $tryserver;
1609: my %alldom=();
1610: foreach $tryserver (keys %libserv) {
1611: $alldom{$hostdom{$tryserver}}=1;
1612: }
1613: my $alldomstr='';
1614: map {
1615: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1616: } sort keys %alldom;
1617: $alldomstr=~s/:$//;
1618: return split(/:/,$alldomstr);
1619: }
1620: }
1621:
1622: # -------------------------------------------------------- Value of a Condition
1623:
1624: sub directcondval {
1625: my $number=shift;
1626: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1627: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1628: } else {
1629: return 2;
1630: }
1631: }
1632:
1633: sub condval {
1634: my $condidx=shift;
1635: my $result=0;
1636: my $allpathcond='';
1637: map {
1638: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
1639: $allpathcond.=
1640: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
1641: }
1642: } split(/\|/,$condidx);
1643: $allpathcond=~s/\|$//;
1644: if ($ENV{'request.course.id'}) {
1645: if ($allpathcond) {
1646: my $operand='|';
1647: my @stack;
1648: map {
1649: if ($_ eq '(') {
1650: push @stack,($operand,$result)
1651: } elsif ($_ eq ')') {
1652: my $before=pop @stack;
1653: if (pop @stack eq '&') {
1654: $result=$result>$before?$before:$result;
1655: } else {
1656: $result=$result>$before?$result:$before;
1657: }
1658: } elsif (($_ eq '&') || ($_ eq '|')) {
1659: $operand=$_;
1660: } else {
1661: my $new=directcondval($_);
1662: if ($operand eq '&') {
1663: $result=$result>$new?$new:$result;
1664: } else {
1665: $result=$result>$new?$result:$new;
1666: }
1667: }
1668: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
1669: }
1670: }
1671: return $result;
1672: }
1673:
1674: # --------------------------------------------------------- Value of a Variable
1675:
1676: sub EXT {
1677: my $varname=shift;
1678: unless ($varname) { return ''; }
1679: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
1680: my $rest;
1681: if ($therest[0]) {
1682: $rest=join('.',@therest);
1683: } else {
1684: $rest='';
1685: }
1686: my $qualifierrest=$qualifier;
1687: if ($rest) { $qualifierrest.='.'.$rest; }
1688: my $spacequalifierrest=$space;
1689: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1690: if ($realm eq 'user') {
1691: # --------------------------------------------------------------- user.resource
1692: if ($space eq 'resource') {
1693: my %restored=&restore();
1694: return $restored{$qualifierrest};
1695: # ----------------------------------------------------------------- user.access
1696: } elsif ($space eq 'access') {
1697: return &allowed($qualifier,$rest);
1698: # ------------------------------------------ user.preferences, user.environment
1699: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1700: return $ENV{join('.',('environment',$qualifierrest))};
1701: # ----------------------------------------------------------------- user.course
1702: } elsif ($space eq 'course') {
1703: return $ENV{join('.',('request.course',$qualifier))};
1704: # ------------------------------------------------------------------- user.role
1705: } elsif ($space eq 'role') {
1706: my ($role,$where)=split(/\./,$ENV{'request.role'});
1707: if ($qualifier eq 'value') {
1708: return $role;
1709: } elsif ($qualifier eq 'extent') {
1710: return $where;
1711: }
1712: # ----------------------------------------------------------------- user.domain
1713: } elsif ($space eq 'domain') {
1714: return $ENV{'user.domain'};
1715: # ------------------------------------------------------------------- user.name
1716: } elsif ($space eq 'name') {
1717: return $ENV{'user.name'};
1718: # ---------------------------------------------------- Any other user namespace
1719: } else {
1720: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
1721: my %reply=&get($space,[$item]);
1722: return $reply{$item};
1723: }
1724: } elsif ($realm eq 'request') {
1725: # ------------------------------------------------------------- request.browser
1726: if ($space eq 'browser') {
1727: return $ENV{'browser.'.$qualifier};
1728: # ------------------------------------------------------------ request.filename
1729: } else {
1730: return $ENV{'request.'.$spacequalifierrest};
1731: }
1732: } elsif ($realm eq 'course') {
1733: # ---------------------------------------------------------- course.description
1734: return $ENV{'course.'.$ENV{'request.course.id'}.'.'.
1735: $spacequalifierrest};
1736: } elsif ($realm eq 'resource') {
1737: if ($ENV{'request.course.id'}) {
1738: # ----------------------------------------------------- Cascading lookup scheme
1739: my $symbp=&symbread();
1740: my $mapp=(split(/\_\_\_/,$symbp))[0];
1741:
1742: my $symbparm=$symbp.'.'.$spacequalifierrest;
1743: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
1744:
1745: my $seclevel=
1746: $ENV{'request.course.id'}.'.['.
1747: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
1748: my $seclevelr=
1749: $ENV{'request.course.id'}.'.['.
1750: $ENV{'request.course.sec'}.'].'.$symbparm;
1751: my $seclevelm=
1752: $ENV{'request.course.id'}.'.['.
1753: $ENV{'request.course.sec'}.'].'.$mapparm;
1754:
1755: my $courselevel=
1756: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
1757: my $courselevelr=
1758: $ENV{'request.course.id'}.'.'.$symbparm;
1759: my $courselevelm=
1760: $ENV{'request.course.id'}.'.'.$mapparm;
1761:
1762: # ----------------------------------------------------------- first, check user
1763: my %resourcedata=get('resourcedata',
1764: [$courselevelr,$courselevelm,$courselevel]);
1765: if (($resourcedata{$courselevelr}!~/^error\:/) &&
1766: ($resourcedata{$courselevelr}!~/^con_lost/)) {
1767:
1768: if ($resourcedata{$courselevelr}) {
1769: return $resourcedata{$courselevelr}; }
1770: if ($resourcedata{$courselevelm}) {
1771: return $resourcedata{$courselevelm}; }
1772: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
1773:
1774: } else {
1775: if ($resourcedata{$courselevelr}!~/No such file/) {
1776: &logthis("<font color=blue>WARNING:".
1777: " Trying to get resource data for ".$ENV{'user.name'}." at "
1778: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
1779: "</font>");
1780: }
1781: }
1782:
1783: # -------------------------------------------------------- second, check course
1784:
1785: my $reply=&reply('get:'.
1786: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
1787: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1788: ':resourcedata:'.
1789: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
1790: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
1791: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
1792: if ($reply!~/^error\:/) {
1793: map {
1794: if ($_) { return &unescape($_); }
1795: } split(/\&/,$reply);
1796: }
1797: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
1798: &logthis("<font color=blue>WARNING:".
1799: " Getting ".$reply." asking for ".$varname." for ".
1800: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1801: ' at '.
1802: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
1803: ' from '.
1804: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
1805: "</font>");
1806: }
1807: # ------------------------------------------------------ third, check map parms
1808: my %parmhash=();
1809: my $thisparm='';
1810: if (tie(%parmhash,'GDBM_File',
1811: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
1812: $thisparm=$parmhash{$symbparm};
1813: untie(%parmhash);
1814: }
1815: if ($thisparm) { return $thisparm; }
1816: }
1817:
1818: # --------------------------------------------- last, look in resource metadata
1819:
1820: $spacequalifierrest=~s/\./\_/;
1821: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
1822: if ($metadata) { return $metadata; }
1823: $metadata=&metadata($ENV{'request.filename'},
1824: 'parameter_'.$spacequalifierrest);
1825: if ($metadata) { return $metadata; }
1826:
1827: $spacequalifierrest=~/[^\_]+$/;
1828:
1829: $metadata=&metadata($ENV{'request.filename'},'parameter_0'.$1);
1830:
1831: if ($metadata) { return $metadata; }
1832:
1833: # ---------------------------------------------------- Any other user namespace
1834: } elsif ($realm eq 'environment') {
1835: # ----------------------------------------------------------------- environment
1836: return $ENV{'environment.'.$spacequalifierrest};
1837: } elsif ($realm eq 'system') {
1838: # ----------------------------------------------------------------- system.time
1839: if ($space eq 'time') {
1840: return time;
1841: }
1842: }
1843: return '';
1844: }
1845:
1846: # ---------------------------------------------------------------- Get metadata
1847:
1848: sub metadata {
1849: my ($uri,$what)=@_;
1850:
1851: $uri=&declutter($uri);
1852: my $filename=$uri;
1853: $uri=~s/\.meta$//;
1854: unless ($metacache{$uri.':keys'}) {
1855: my %metathesekeys=();
1856: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
1857: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
1858: my $parser=HTML::TokeParser->new(\$metastring);
1859: my $token;
1860: undef %metathesekeys;
1861: while ($token=$parser->get_token) {
1862: if ($token->[0] eq 'S') {
1863: if (defined($token->[2]->{'package'})) {
1864: my $package=$token->[2]->{'package'};
1865: my $keyroot='';
1866: if (defined($token->[2]->{'part'})) {
1867: $keyroot.='_'.$token->[2]->{'part'};
1868: }
1869: if (defined($token->[2]->{'id'})) {
1870: $keyroot.='_'.$token->[2]->{'id'};
1871: }
1872: if ($metacache{$uri.':packages'}) {
1873: $metacache{$uri.':packages'}.=','.$package.$keyroot;
1874: } else {
1875: $metacache{$uri.':packages'}=$package.$keyroot;
1876: }
1877: map {
1878: if ($_=~/^$package\&/) {
1879: my ($pack,$name,$subp)=split(/\&/,$_);
1880: my $value=$packagetab{$_};
1881: my $part=$keyroot;
1882: $part=~s/^\_//;
1883: if ($subp eq 'display') {
1884: $value.=' [Part: '.$part.']';
1885: }
1886: my $unikey='parameter'.$keyroot.'_'.$name;
1887: $metathesekeys{$unikey}=1;
1888: $metacache{$uri.':'.$unikey.'.part'}=$part;
1889: unless
1890: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
1891: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
1892: }
1893: }
1894: } keys %packagetab;
1895: } else {
1896: my $entry=$token->[1];
1897: my $unikey=$entry;
1898: if (defined($token->[2]->{'part'})) {
1899: $unikey.='_'.$token->[2]->{'part'};
1900: }
1901: if (defined($token->[2]->{'id'})) {
1902: $unikey.='_'.$token->[2]->{'id'};
1903: }
1904: if (defined($token->[2]->{'name'})) {
1905: $unikey.='_'.$token->[2]->{'name'};
1906: }
1907: $metathesekeys{$unikey}=1;
1908: map {
1909: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
1910: } @{$token->[3]};
1911: unless (
1912: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
1913: ) { $metacache{$uri.':'.$unikey}=
1914: $metacache{$uri.':'.$unikey.'.default'};
1915: }
1916: }
1917: }
1918: }
1919: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
1920: }
1921: return $metacache{$uri.':'.$what};
1922: }
1923:
1924: # ------------------------------------------------- Update symbolic store links
1925:
1926: sub symblist {
1927: my ($mapname,%newhash)=@_;
1928: $mapname=declutter($mapname);
1929: my %hash;
1930: if (($ENV{'request.course.fn'}) && (%newhash)) {
1931: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1932: &GDBM_WRCREAT,0640)) {
1933: map {
1934: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
1935: } keys %newhash;
1936: if (untie(%hash)) {
1937: return 'ok';
1938: }
1939: }
1940: }
1941: return 'error';
1942: }
1943:
1944: # ------------------------------------------------------ Return symb list entry
1945:
1946: sub symbread {
1947: my $thisfn=shift;
1948: unless ($thisfn) {
1949: $thisfn=$ENV{'request.filename'};
1950: }
1951: $thisfn=declutter($thisfn);
1952: my %hash;
1953: my %bighash;
1954: my $syval='';
1955: if (($ENV{'request.course.fn'}) && ($thisfn)) {
1956: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1957: &GDBM_READER,0640)) {
1958: $syval=$hash{$thisfn};
1959: untie(%hash);
1960: }
1961: # ---------------------------------------------------------- There was an entry
1962: if ($syval) {
1963: unless ($syval=~/\_\d+$/) {
1964: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
1965: &appenv('request.ambiguous' => $thisfn);
1966: return '';
1967: }
1968: $syval.=$1;
1969: }
1970: } else {
1971: # ------------------------------------------------------- Was not in symb table
1972: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1973: &GDBM_READER,0640)) {
1974: # ---------------------------------------------- Get ID(s) for current resource
1975: my $ids=$bighash{'ids_/res/'.$thisfn};
1976: unless ($ids) {
1977: $ids=$bighash{'ids_/'.$thisfn};
1978: }
1979: if ($ids) {
1980: # ------------------------------------------------------------------- Has ID(s)
1981: my @possibilities=split(/\,/,$ids);
1982: if ($#possibilities==0) {
1983: # ----------------------------------------------- There is only one possibility
1984: my ($mapid,$resid)=split(/\./,$ids);
1985: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
1986: } else {
1987: # ------------------------------------------ There is more than one possibility
1988: my $realpossible=0;
1989: map {
1990: my $file=$bighash{'src_'.$_};
1991: if (&allowed('bre',$file)) {
1992: my ($mapid,$resid)=split(/\./,$_);
1993: if ($bighash{'map_type_'.$mapid} ne 'page') {
1994: $realpossible++;
1995: $syval=declutter($bighash{'map_id_'.$mapid}).
1996: '___'.$resid;
1997: }
1998: }
1999: } @possibilities;
2000: if ($realpossible!=1) { $syval=''; }
2001: }
2002: }
2003: untie(%bighash)
2004: }
2005: }
2006: if ($syval) {
2007: return $syval.'___'.$thisfn;
2008: }
2009: }
2010: &appenv('request.ambiguous' => $thisfn);
2011: return '';
2012: }
2013:
2014: # ---------------------------------------------------------- Return random seed
2015:
2016: sub numval {
2017: my $txt=shift;
2018: $txt=~tr/A-J/0-9/;
2019: $txt=~tr/a-j/0-9/;
2020: $txt=~tr/K-T/0-9/;
2021: $txt=~tr/k-t/0-9/;
2022: $txt=~tr/U-Z/0-5/;
2023: $txt=~tr/u-z/0-5/;
2024: $txt=~s/\D//g;
2025: return int($txt);
2026: }
2027:
2028: sub rndseed {
2029: my $symb;
2030: unless ($symb=&symbread()) { return time; }
2031: {
2032: use integer;
2033: my $symbchck=unpack("%32C*",$symb) << 27;
2034: my $symbseed=numval($symb) << 22;
2035: my $namechck=unpack("%32C*",$ENV{'user.name'}) << 17;
2036: my $nameseed=numval($ENV{'user.name'}) << 12;
2037: my $domainseed=unpack("%32C*",$ENV{'user.domain'}) << 7;
2038: my $courseseed=unpack("%32C*",$ENV{'request.course.id'});
2039: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2040: #uncommenting these lines can break things!
2041: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2042: #&Apache::lonxml::debug("rndseed :$num:$symb");
2043: return $num;
2044: }
2045: }
2046:
2047: sub ireceipt {
2048: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2049: my $cuname=unpack("%32C*",$funame);
2050: my $cudom=unpack("%32C*",$fudom);
2051: my $cucourseid=unpack("%32C*",$fucourseid);
2052: my $cusymb=unpack("%32C*",$fusymb);
2053: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2054: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2055: ($cunique%$cuname+
2056: $cunique%$cudom+
2057: $cusymb%$cuname+
2058: $cusymb%$cudom+
2059: $cucourseid%$cuname+
2060: $cucourseid%$cudom);
2061: }
2062:
2063: sub receipt {
2064: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2065: $ENV{'request.course.id'},&symbread());
2066: }
2067:
2068: # ------------------------------------------------------------ Serves up a file
2069: # returns either the contents of the file or a -1
2070: sub getfile {
2071: my $file=shift;
2072: &repcopy($file);
2073: if (! -e $file ) { return -1; };
2074: my $fh=Apache::File->new($file);
2075: my $a='';
2076: while (<$fh>) { $a .=$_; }
2077: return $a
2078: }
2079:
2080: sub filelocation {
2081: my ($dir,$file) = @_;
2082: my $location;
2083: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2084: if ($file=~m:^/~:) { # is a contruction space reference
2085: $location = $file;
2086: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2087: } else {
2088: $file=~s/^$perlvar{'lonDocRoot'}//;
2089: $file=~s:^/*res::;
2090: if ( !( $file =~ m:^/:) ) {
2091: $location = $dir. '/'.$file;
2092: } else {
2093: $location = '/home/httpd/html/res'.$file;
2094: }
2095: }
2096: $location=~s://+:/:g; # remove duplicate /
2097: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2098: return $location;
2099: }
2100:
2101: sub hreflocation {
2102: my ($dir,$file)=@_;
2103: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
2104: my $finalpath=filelocation($dir,$file);
2105: $finalpath=~s/^\/home\/httpd\/html//;
2106: return $finalpath;
2107: } else {
2108: return $file;
2109: }
2110: }
2111:
2112: # ------------------------------------------------------------- Declutters URLs
2113:
2114: sub declutter {
2115: my $thisfn=shift;
2116: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2117: $thisfn=~s/^\///;
2118: $thisfn=~s/^res\///;
2119: return $thisfn;
2120: }
2121:
2122: # -------------------------------------------------------- Escape Special Chars
2123:
2124: sub escape {
2125: my $str=shift;
2126: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2127: return $str;
2128: }
2129:
2130: # ----------------------------------------------------- Un-Escape Special Chars
2131:
2132: sub unescape {
2133: my $str=shift;
2134: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2135: return $str;
2136: }
2137:
2138: # ================================================================ Main Program
2139:
2140: sub BEGIN {
2141: if ($readit ne 'done') {
2142: # ------------------------------------------------------------ Read access.conf
2143: {
2144: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2145:
2146: while (my $configline=<$config>) {
2147: if ($configline =~ /PerlSetVar/) {
2148: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2149: chomp($varvalue);
2150: $perlvar{$varname}=$varvalue;
2151: }
2152: }
2153: }
2154:
2155: # ------------------------------------------------------------- Read hosts file
2156: {
2157: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2158:
2159: while (my $configline=<$config>) {
2160: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2161: $hostname{$id}=$name;
2162: $hostdom{$id}=$domain;
2163: if ($role eq 'library') { $libserv{$id}=$name; }
2164: }
2165: }
2166:
2167: # ------------------------------------------------------ Read spare server file
2168: {
2169: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2170:
2171: while (my $configline=<$config>) {
2172: chomp($configline);
2173: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2174: $spareid{$configline}=1;
2175: }
2176: }
2177: }
2178: # ------------------------------------------------------------ Read permissions
2179: {
2180: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2181:
2182: while (my $configline=<$config>) {
2183: chomp($configline);
2184: my ($role,$perm)=split(/ /,$configline);
2185: if ($perm ne '') { $pr{$role}=$perm; }
2186: }
2187: }
2188:
2189: # -------------------------------------------- Read plain texts for permissions
2190: {
2191: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2192:
2193: while (my $configline=<$config>) {
2194: chomp($configline);
2195: my ($short,$plain)=split(/:/,$configline);
2196: if ($plain ne '') { $prp{$short}=$plain; }
2197: }
2198: }
2199:
2200: # ---------------------------------------------------------- Read package table
2201: {
2202: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
2203:
2204: while (my $configline=<$config>) {
2205: chomp($configline);
2206: my ($short,$plain)=split(/:/,$configline);
2207: my ($pack,$name)=split(/\&/,$short);
2208: if ($plain ne '') {
2209: $packagetab{$pack.'&'.$name.'&name'}=$name;
2210: $packagetab{$short}=$plain;
2211: }
2212: }
2213: }
2214:
2215: # ------------------------------------------------------------- Read file types
2216: {
2217: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2218:
2219: while (my $configline=<$config>) {
2220: chomp($configline);
2221: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2222: if ($descr[0] ne '') {
2223: $fe{$ending}=$emb;
2224: $fd{$ending}=join(' ',@descr);
2225: }
2226: }
2227: }
2228:
2229: %metacache=();
2230:
2231: $readit='done';
2232: &logthis('<font color=yellow>INFO: Read configuration</font>');
2233: }
2234: }
2235: 1;
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