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([symb,courseid,domain,uname])
76: # : returns a random seed, all arguments are optional,
77: # if they aren't sent it use the environment to derive
78: # them
79: # Note: if symb isn't sent and it can't get one from
80: # &symbread it will use the current time as it's return
81: # receipt() : returns a receipt to be given out to users
82: # getfile(filename) : returns the contents of filename, or a -1 if it can't
83: # be found, replicates and subscribes to the file
84: # filelocation(dir,file) : returns a fairly clean absolute reference to file
85: # from the directory dir
86: # hreflocation(dir,file) : same as filelocation, but for hrefs
87: # log(domain,user,home,msg) : write to permanent log for user
88: # usection(domain,user,courseid) : output of section name/number or '' for
89: # "not in course" and '-1' for "no section"
90: # userenvironment(domain,user,what) : puts out any environment parameter
91: # for a user
92: # idput(domain,hash) : writes IDs for users from hash (name=>id,name=>id)
93: # idget(domain,array): returns hash with usernames (id=>name,id=>name) for
94: # an array of IDs
95: # idrget(domain,array): returns hash with IDs for usernames (name=>id,...) for
96: # an array of names
97: # metadata(file,entry): returns the metadata entry for a file. entry='keys'
98: # returns a comma separated list of keys
99: #
100: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
101: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
102: # 11/8,11/16,11/18,11/22,11/23,12/22,
103: # 01/06,01/13,02/24,02/28,02/29,
104: # 03/01,03/02,03/06,03/07,03/13,
105: # 04/05,05/29,05/31,06/01,
106: # 06/05,06/26 Gerd Kortemeyer
107: # 06/26 Ben Tyszka
108: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
109: # 08/14 Ben Tyszka
110: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
111: # 10/04 Gerd Kortemeyer
112: # 10/04 Guy Albertelli
113: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
114: # 10/30,10/31,
115: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
116: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
117: # 05/01/01 Guy Albertelli
118: # 05/01,06/01,09/01 Gerd Kortemeyer
119: # 09/01 Guy Albertelli
120: # 09/01,10/01,11/01 Gerd Kortemeyer
121: # 02/27/01 Scott Harrison
122: # 3/2 Gerd Kortemeyer
123: # 3/15,3/19 Scott Harrison
124: # 3/19,3/20 Gerd Kortemeyer
125: # 3/22,3/27,4/2,4/16,4/17 Scott Harrison
126: # 5/26,5/28 Gerd Kortemeyer
127: # 5/30 H. K. Ng
128: # 6/1 Gerd Kortemeyer
129: # July Guy Albertelli
130: # 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20 Gerd Kortemeyer
131:
132: package Apache::lonnet;
133:
134: use strict;
135: use Apache::File;
136: use LWP::UserAgent();
137: use HTTP::Headers;
138: use vars
139: qw(%perlvar %hostname %homecache %hostip %spareid %hostdom %libserv %pr %prp %fe %fd $readit %metacache %packagetab %courselogs);
140: use IO::Socket;
141: use GDBM_File;
142: use Apache::Constants qw(:common :http);
143: use HTML::TokeParser;
144: use Fcntl qw(:flock);
145:
146: # --------------------------------------------------------------------- Logging
147:
148: sub logthis {
149: my $message=shift;
150: my $execdir=$perlvar{'lonDaemons'};
151: my $now=time;
152: my $local=localtime($now);
153: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
154: print $fh "$local ($$): $message\n";
155: return 1;
156: }
157:
158: sub logperm {
159: my $message=shift;
160: my $execdir=$perlvar{'lonDaemons'};
161: my $now=time;
162: my $local=localtime($now);
163: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
164: print $fh "$now:$message:$local\n";
165: return 1;
166: }
167:
168: # -------------------------------------------------- Non-critical communication
169: sub subreply {
170: my ($cmd,$server)=@_;
171: my $peerfile="$perlvar{'lonSockDir'}/$server";
172: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
173: Type => SOCK_STREAM,
174: Timeout => 10)
175: or return "con_lost";
176: print $client "$cmd\n";
177: my $answer=<$client>;
178: if (!$answer) { $answer="con_lost"; }
179: chomp($answer);
180: return $answer;
181: }
182:
183: sub reply {
184: my ($cmd,$server)=@_;
185: my $answer=subreply($cmd,$server);
186: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
187: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
188: &logthis("<font color=blue>WARNING:".
189: " $cmd to $server returned $answer</font>");
190: }
191: return $answer;
192: }
193:
194: # ----------------------------------------------------------- Send USR1 to lonc
195:
196: sub reconlonc {
197: my $peerfile=shift;
198: &logthis("Trying to reconnect for $peerfile");
199: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
200: if (my $fh=Apache::File->new("$loncfile")) {
201: my $loncpid=<$fh>;
202: chomp($loncpid);
203: if (kill 0 => $loncpid) {
204: &logthis("lonc at pid $loncpid responding, sending USR1");
205: kill USR1 => $loncpid;
206: sleep 1;
207: if (-e "$peerfile") { return; }
208: &logthis("$peerfile still not there, give it another try");
209: sleep 5;
210: if (-e "$peerfile") { return; }
211: &logthis(
212: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
213: } else {
214: &logthis(
215: "<font color=blue>WARNING:".
216: " lonc at pid $loncpid not responding, giving up</font>");
217: }
218: } else {
219: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
220: }
221: }
222:
223: # ------------------------------------------------------ Critical communication
224:
225: sub critical {
226: my ($cmd,$server)=@_;
227: unless ($hostname{$server}) {
228: &logthis("<font color=blue>WARNING:".
229: " Critical message to unknown server ($server)</font>");
230: return 'no_such_host';
231: }
232: my $answer=reply($cmd,$server);
233: if ($answer eq 'con_lost') {
234: my $pingreply=reply('ping',$server);
235: &reconlonc("$perlvar{'lonSockDir'}/$server");
236: my $pongreply=reply('pong',$server);
237: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
238: $answer=reply($cmd,$server);
239: if ($answer eq 'con_lost') {
240: my $now=time;
241: my $middlename=$cmd;
242: $middlename=substr($middlename,0,16);
243: $middlename=~s/\W//g;
244: my $dfilename=
245: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
246: {
247: my $dfh;
248: if ($dfh=Apache::File->new(">$dfilename")) {
249: print $dfh "$cmd\n";
250: }
251: }
252: sleep 2;
253: my $wcmd='';
254: {
255: my $dfh;
256: if ($dfh=Apache::File->new("$dfilename")) {
257: $wcmd=<$dfh>;
258: }
259: }
260: chomp($wcmd);
261: if ($wcmd eq $cmd) {
262: &logthis("<font color=blue>WARNING: ".
263: "Connection buffer $dfilename: $cmd</font>");
264: &logperm("D:$server:$cmd");
265: return 'con_delayed';
266: } else {
267: &logthis("<font color=red>CRITICAL:"
268: ." Critical connection failed: $server $cmd</font>");
269: &logperm("F:$server:$cmd");
270: return 'con_failed';
271: }
272: }
273: }
274: return $answer;
275: }
276:
277: # ---------------------------------------------------------- Append Environment
278:
279: sub appenv {
280: my %newenv=@_;
281: map {
282: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
283: &logthis("<font color=blue>WARNING: ".
284: "Attempt to modify environment ".$_." to ".$newenv{$_}
285: .'</font>');
286: delete($newenv{$_});
287: } else {
288: $ENV{$_}=$newenv{$_};
289: }
290: } keys %newenv;
291:
292: my $lockfh;
293: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
294: return 'error: '.$!;
295: }
296: unless (flock($lockfh,LOCK_EX)) {
297: &logthis("<font color=blue>WARNING: ".
298: 'Could not obtain exclusive lock in appenv: '.$!);
299: $lockfh->close();
300: return 'error: '.$!;
301: }
302:
303: my @oldenv;
304: {
305: my $fh;
306: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
307: return 'error: '.$!;
308: }
309: @oldenv=<$fh>;
310: $fh->close();
311: }
312: for (my $i=0; $i<=$#oldenv; $i++) {
313: chomp($oldenv[$i]);
314: if ($oldenv[$i] ne '') {
315: my ($name,$value)=split(/=/,$oldenv[$i]);
316: unless (defined($newenv{$name})) {
317: $newenv{$name}=$value;
318: }
319: }
320: }
321: {
322: my $fh;
323: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
324: return 'error';
325: }
326: my $newname;
327: foreach $newname (keys %newenv) {
328: print $fh "$newname=$newenv{$newname}\n";
329: }
330: $fh->close();
331: }
332:
333: $lockfh->close();
334: return 'ok';
335: }
336: # ----------------------------------------------------- Delete from Environment
337:
338: sub delenv {
339: my $delthis=shift;
340: my %newenv=();
341: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
342: &logthis("<font color=blue>WARNING: ".
343: "Attempt to delete from environment ".$delthis);
344: return 'error';
345: }
346: my @oldenv;
347: {
348: my $fh;
349: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
350: return 'error';
351: }
352: unless (flock($fh,LOCK_SH)) {
353: &logthis("<font color=blue>WARNING: ".
354: 'Could not obtain shared lock in delenv: '.$!);
355: $fh->close();
356: return 'error: '.$!;
357: }
358: @oldenv=<$fh>;
359: $fh->close();
360: }
361: {
362: my $fh;
363: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
364: return 'error';
365: }
366: unless (flock($fh,LOCK_EX)) {
367: &logthis("<font color=blue>WARNING: ".
368: 'Could not obtain exclusive lock in delenv: '.$!);
369: $fh->close();
370: return 'error: '.$!;
371: }
372: map {
373: unless ($_=~/^$delthis/) { print $fh $_; }
374: } @oldenv;
375: $fh->close();
376: }
377: return 'ok';
378: }
379:
380: # ------------------------------ Find server with least workload from spare.tab
381:
382: sub spareserver {
383: my $tryserver;
384: my $spareserver='';
385: my $lowestserver=100;
386: foreach $tryserver (keys %spareid) {
387: my $answer=reply('load',$tryserver);
388: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
389: $spareserver="http://$hostname{$tryserver}";
390: $lowestserver=$answer;
391: }
392: }
393: return $spareserver;
394: }
395:
396: # --------- Try to authenticate user from domain's lib servers (first this one)
397:
398: sub authenticate {
399: my ($uname,$upass,$udom)=@_;
400: $upass=escape($upass);
401: if (($perlvar{'lonRole'} eq 'library') &&
402: ($udom eq $perlvar{'lonDefDomain'})) {
403: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
404: if ($answer =~ /authorized/) {
405: if ($answer eq 'authorized') {
406: &logthis("User $uname at $udom authorized by local server");
407: return $perlvar{'lonHostID'};
408: }
409: if ($answer eq 'non_authorized') {
410: &logthis("User $uname at $udom rejected by local server");
411: return 'no_host';
412: }
413: }
414: }
415:
416: my $tryserver;
417: foreach $tryserver (keys %libserv) {
418: if ($hostdom{$tryserver} eq $udom) {
419: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
420: if ($answer =~ /authorized/) {
421: if ($answer eq 'authorized') {
422: &logthis("User $uname at $udom authorized by $tryserver");
423: return $tryserver;
424: }
425: if ($answer eq 'non_authorized') {
426: &logthis("User $uname at $udom rejected by $tryserver");
427: return 'no_host';
428: }
429: }
430: }
431: }
432: &logthis("User $uname at $udom could not be authenticated");
433: return 'no_host';
434: }
435:
436: # ---------------------- Find the homebase for a user from domain's lib servers
437:
438: sub homeserver {
439: my ($uname,$udom)=@_;
440:
441: my $index="$uname:$udom";
442: if ($homecache{$index}) { return "$homecache{$index}"; }
443:
444: my $tryserver;
445: foreach $tryserver (keys %libserv) {
446: if ($hostdom{$tryserver} eq $udom) {
447: my $answer=reply("home:$udom:$uname",$tryserver);
448: if ($answer eq 'found') {
449: $homecache{$index}=$tryserver;
450: return $tryserver;
451: }
452: }
453: }
454: return 'no_host';
455: }
456:
457: # ------------------------------------- Find the usernames behind a list of IDs
458:
459: sub idget {
460: my ($udom,@ids)=@_;
461: my %returnhash=();
462:
463: my $tryserver;
464: foreach $tryserver (keys %libserv) {
465: if ($hostdom{$tryserver} eq $udom) {
466: my $idlist=join('&',@ids);
467: $idlist=~tr/A-Z/a-z/;
468: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
469: my @answer=();
470: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
471: @answer=split(/\&/,$reply);
472: } ;
473: my $i;
474: for ($i=0;$i<=$#ids;$i++) {
475: if ($answer[$i]) {
476: $returnhash{$ids[$i]}=$answer[$i];
477: }
478: }
479: }
480: }
481: return %returnhash;
482: }
483:
484: # ------------------------------------- Find the IDs behind a list of usernames
485:
486: sub idrget {
487: my ($udom,@unames)=@_;
488: my %returnhash=();
489: map {
490: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
491: } @unames;
492: return %returnhash;
493: }
494:
495: # ------------------------------- Store away a list of names and associated IDs
496:
497: sub idput {
498: my ($udom,%ids)=@_;
499: my %servers=();
500: map {
501: my $uhom=&homeserver($_,$udom);
502: if ($uhom ne 'no_host') {
503: my $id=&escape($ids{$_});
504: $id=~tr/A-Z/a-z/;
505: my $unam=&escape($_);
506: if ($servers{$uhom}) {
507: $servers{$uhom}.='&'.$id.'='.$unam;
508: } else {
509: $servers{$uhom}=$id.'='.$unam;
510: }
511: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
512: }
513: } keys %ids;
514: map {
515: &critical('idput:'.$udom.':'.$servers{$_},$_);
516: } keys %servers;
517: }
518:
519: # ------------------------------------- Find the section of student in a course
520:
521: sub usection {
522: my ($udom,$unam,$courseid)=@_;
523: $courseid=~s/\_/\//g;
524: $courseid=~s/^(\w)/\/$1/;
525: map {
526: my ($key,$value)=split(/\=/,$_);
527: $key=&unescape($key);
528: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
529: my $section=$1;
530: if ($key eq $courseid.'_st') { $section=''; }
531: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
532: my $now=time;
533: my $notactive=0;
534: if ($start) {
535: if ($now<$start) { $notactive=1; }
536: }
537: if ($end) {
538: if ($now>$end) { $notactive=1; }
539: }
540: unless ($notactive) { return $section; }
541: }
542: } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
543: &homeserver($unam,$udom)));
544: return '-1';
545: }
546:
547: # ------------------------------------- Read an entry from a user's environment
548:
549: sub userenvironment {
550: my ($udom,$unam,@what)=@_;
551: my %returnhash=();
552: my @answer=split(/\&/,
553: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
554: &homeserver($unam,$udom)));
555: my $i;
556: for ($i=0;$i<=$#what;$i++) {
557: $returnhash{$what[$i]}=&unescape($answer[$i]);
558: }
559: return %returnhash;
560: }
561:
562: # ----------------------------- Subscribe to a resource, return URL if possible
563:
564: sub subscribe {
565: my $fname=shift;
566: my $author=$fname;
567: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
568: my ($udom,$uname)=split(/\//,$author);
569: my $home=homeserver($uname,$udom);
570: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
571: return 'not_found';
572: }
573: my $answer=reply("sub:$fname",$home);
574: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
575: $answer.=' by '.$home;
576: }
577: return $answer;
578: }
579:
580: # -------------------------------------------------------------- Replicate file
581:
582: sub repcopy {
583: my $filename=shift;
584: $filename=~s/\/+/\//g;
585: my $transname="$filename.in.transfer";
586: if ((-e $filename) || (-e $transname)) { return OK; }
587: my $remoteurl=subscribe($filename);
588: if ($remoteurl =~ /^con_lost by/) {
589: &logthis("Subscribe returned $remoteurl: $filename");
590: return HTTP_SERVICE_UNAVAILABLE;
591: } elsif ($remoteurl eq 'not_found') {
592: &logthis("Subscribe returned not_found: $filename");
593: return HTTP_NOT_FOUND;
594: } elsif ($remoteurl =~ /^rejected by/) {
595: &logthis("Subscribe returned $remoteurl: $filename");
596: return FORBIDDEN;
597: } elsif ($remoteurl eq 'directory') {
598: return OK;
599: } else {
600: my @parts=split(/\//,$filename);
601: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
602: if ($path ne "$perlvar{'lonDocRoot'}/res") {
603: &logthis("Malconfiguration for replication: $filename");
604: return HTTP_BAD_REQUEST;
605: }
606: my $count;
607: for ($count=5;$count<$#parts;$count++) {
608: $path.="/$parts[$count]";
609: if ((-e $path)!=1) {
610: mkdir($path,0777);
611: }
612: }
613: my $ua=new LWP::UserAgent;
614: my $request=new HTTP::Request('GET',"$remoteurl");
615: my $response=$ua->request($request,$transname);
616: if ($response->is_error()) {
617: unlink($transname);
618: my $message=$response->status_line;
619: &logthis("<font color=blue>WARNING:"
620: ." LWP get: $message: $filename</font>");
621: return HTTP_SERVICE_UNAVAILABLE;
622: } else {
623: if ($remoteurl!~/\.meta$/) {
624: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
625: my $mresponse=$ua->request($mrequest,$filename.'.meta');
626: if ($mresponse->is_error()) {
627: unlink($filename.'.meta');
628: &logthis(
629: "<font color=yellow>INFO: No metadata: $filename</font>");
630: }
631: }
632: rename($transname,$filename);
633: return OK;
634: }
635: }
636: }
637:
638: # --------------------------------------------------------- Server Side Include
639:
640: sub ssi {
641:
642: my ($fn,%form)=@_;
643:
644: my $ua=new LWP::UserAgent;
645:
646: my $request;
647:
648: if (%form) {
649: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
650: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
651: } else {
652: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
653: }
654:
655: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
656: my $response=$ua->request($request);
657:
658: return $response->content;
659: }
660:
661: # ------------------------------------------------------------------------- Log
662:
663: sub log {
664: my ($dom,$nam,$hom,$what)=@_;
665: return critical("log:$dom:$nam:$what",$hom);
666: }
667:
668: # ------------------------------------------------------------------ Course Log
669:
670: sub flushcourselogs {
671: &logthis('Flushing course log buffers');
672: map {
673: my $crsid=$_;
674: if (&reply('log:'.$ENV{'course.'.$crsid.'.domain'}.':'.
675: $ENV{'course.'.$crsid.'.num'}.':'.
676: &escape($courselogs{$crsid}),
677: $ENV{'course.'.$crsid.'.home'}) eq 'ok') {
678: delete $courselogs{$crsid};
679: } else {
680: &logthis('Failed to flush log buffer for '.$crsid);
681: if (length($courselogs{$crsid})>40000) {
682: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
683: " exceeded maximum size, deleting.</font>");
684: delete $courselogs{$crsid};
685: }
686: }
687: } keys %courselogs;
688: }
689:
690: sub courselog {
691: my $what=shift;
692: unless ($ENV{'request.course.id'}) { return ''; }
693: if (defined $courselogs{$ENV{'request.course.id'}}) {
694: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
695: } else {
696: $courselogs{$ENV{'request.course.id'}}.=$what;
697: }
698: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
699: &flushcourselogs();
700: }
701: }
702:
703: # ----------------------------------------------------------- Check out an item
704:
705: sub checkout {
706: my ($symb,$tuname,$tudom,$tcrsid)=@_;
707: my $now=time;
708: my $lonhost=$perlvar{'lonHostID'};
709: my $infostr=&escape(
710: $tuname.'&'.
711: $tudom.'&'.
712: $tcrsid.'&'.
713: $symb.'&'.
714: $now.'&'.$ENV{'REMOTE_ADDR'});
715: my $token=&reply('tmpput:'.$infostr,$lonhost);
716: if ($token=~/^error\:/) {
717: &logthis("<font color=blue>WARNING: ".
718: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
719: "</font>");
720: return '';
721: }
722:
723: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
724: $token=~tr/a-z/A-Z/;
725:
726: my %infohash=('resource.0.outtoken' => $token,
727: 'resource.0.checkouttime' => $now,
728: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
729:
730: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
731: return '';
732: } else {
733: &logthis("<font color=blue>WARNING: ".
734: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
735: "</font>");
736: }
737:
738: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
739: &escape('Checkout '.$infostr.' - '.
740: $token)) ne 'ok') {
741: return '';
742: } else {
743: &logthis("<font color=blue>WARNING: ".
744: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
745: "</font>");
746: }
747: return $token;
748: }
749:
750: # ------------------------------------------------------------ Check in an item
751:
752: sub checkin {
753: my $token=shift;
754: my $now=time;
755: my ($ta,$tb,$lonhost)=split(/\*/,$token);
756: $lonhost=~tr/A-Z/a-z/;
757: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
758: $dtoken=~s/\W/\_/g;
759: my ($tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
760: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
761:
762: unless (($tuname) && ($tudom)) {
763: &logthis('Check in '.$token.' ('.$dtoken.') failed');
764: return '';
765: }
766:
767: unless (&allowed('mgr',$tcrsid)) {
768: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
769: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
770: return '';
771: }
772:
773: my %infohash=('resource.0.intoken' => $token,
774: 'resource.0.checkintime' => $now,
775: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
776:
777: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
778: return '';
779: }
780:
781: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
782: &escape('Checkin - '.$token)) ne 'ok') {
783: return '';
784: }
785:
786: return ($symb,$tuname,$tudom,$tcrsid);
787: }
788:
789: # --------------------------------------------- Set Expire Date for Spreadsheet
790:
791: sub expirespread {
792: my ($uname,$udom,$stype,$usymb)=@_;
793: my $cid=$ENV{'request.course.id'};
794: if ($cid) {
795: my $now=time;
796: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
797: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
798: $ENV{'course.'.$cid.'.num'}.
799: ':nohist_expirationdates:'.
800: &escape($key).'='.$now,
801: $ENV{'course.'.$cid.'.home'})
802: }
803: return 'ok';
804: }
805:
806: # ----------------------------------------------------- Devalidate Spreadsheets
807:
808: sub devalidate {
809: my $symb=shift;
810: my $cid=$ENV{'request.course.id'};
811: if ($cid) {
812: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
813: my $status=
814: &del('nohist_calculatedsheet',
815: [$key.'studentcalc'],
816: $ENV{'course.'.$cid.'.domain'},
817: $ENV{'course.'.$cid.'.num'})
818: .' '.
819: &del('nohist_calculatedsheets_'.$cid,
820: [$key.'assesscalc:'.$symb]);
821: unless ($status eq 'ok ok') {
822: &logthis('Could not devalidate spreadsheet '.
823: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
824: $symb.': '.$status);
825: }
826: }
827: }
828:
829: # ----------------------------------------------------------------------- Store
830:
831: sub store {
832: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
833: my $home='';
834:
835: if ($stuname) {
836: $home=&homeserver($stuname,$domain);
837: }
838:
839: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
840:
841: &devalidate($symb);
842:
843: $symb=escape($symb);
844: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
845: if (!$domain) { $domain=$ENV{'user.domain'}; }
846: if (!$stuname) { $stuname=$ENV{'user.name'}; }
847: if (!$home) { $home=$ENV{'user.home'}; }
848: my $namevalue='';
849: map {
850: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
851: } keys %$storehash;
852: $namevalue=~s/\&$//;
853: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
854: }
855:
856: # -------------------------------------------------------------- Critical Store
857:
858: sub cstore {
859: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
860: my $home='';
861:
862: if ($stuname) {
863: $home=&homeserver($stuname,$domain);
864: }
865:
866: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
867:
868: &devalidate($symb);
869:
870: $symb=escape($symb);
871: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
872: if (!$domain) { $domain=$ENV{'user.domain'}; }
873: if (!$stuname) { $stuname=$ENV{'user.name'}; }
874: if (!$home) { $home=$ENV{'user.home'}; }
875:
876: my $namevalue='';
877: map {
878: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
879: } keys %$storehash;
880: $namevalue=~s/\&$//;
881: return critical("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
882: }
883:
884: # --------------------------------------------------------------------- Restore
885:
886: sub restore {
887: my ($symb,$namespace,$domain,$stuname) = @_;
888: my $home='';
889:
890: if ($stuname) {
891: $home=&homeserver($stuname,$domain);
892: }
893:
894: if (!$symb) {
895: unless ($symb=escape(&symbread())) { return ''; }
896: } else {
897: $symb=&escape($symb);
898: }
899: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
900: if (!$domain) { $domain=$ENV{'user.domain'}; }
901: if (!$stuname) { $stuname=$ENV{'user.name'}; }
902: if (!$home) { $home=$ENV{'user.home'}; }
903: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
904:
905: my %returnhash=();
906: map {
907: my ($name,$value)=split(/\=/,$_);
908: $returnhash{&unescape($name)}=&unescape($value);
909: } split(/\&/,$answer);
910: my $version;
911: for ($version=1;$version<=$returnhash{'version'};$version++) {
912: map {
913: $returnhash{$_}=$returnhash{$version.':'.$_};
914: } split(/\:/,$returnhash{$version.':keys'});
915: }
916: return %returnhash;
917: }
918:
919: # ---------------------------------------------------------- Course Description
920:
921: sub coursedescription {
922: my $courseid=shift;
923: $courseid=~s/^\///;
924: $courseid=~s/\_/\//g;
925: my ($cdomain,$cnum)=split(/\//,$courseid);
926: my $chome=&homeserver($cnum,$cdomain);
927: if ($chome ne 'no_host') {
928: my %returnhash=&dump('environment',$cdomain,$cnum);
929: if (!exists($returnhash{'con_lost'})) {
930: my $normalid=$cdomain.'_'.$cnum;
931: my %envhash=();
932: $returnhash{'home'}= $chome;
933: $returnhash{'domain'} = $cdomain;
934: $returnhash{'num'} = $cnum;
935: while (my ($name,$value) = each %returnhash) {
936: $envhash{'course.'.$normalid.'.'.$name}=$value;
937: }
938: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
939: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
940: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
941: $envhash{'course.'.$normalid.'.last_cache'}=time;
942: $envhash{'course.'.$normalid.'.home'}=$chome;
943: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
944: $envhash{'course.'.$normalid.'.num'}=$cnum;
945: &appenv(%envhash);
946: return %returnhash;
947: }
948: }
949: return ();
950: }
951:
952: # -------------------------------------------------------- Get user privileges
953:
954: sub rolesinit {
955: my ($domain,$username,$authhost)=@_;
956: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
957: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
958: my %allroles=();
959: my %thesepriv=();
960: my $now=time;
961: my $userroles="user.login.time=$now\n";
962: my $thesestr;
963:
964: if ($rolesdump ne '') {
965: map {
966: if ($_!~/^rolesdef\&/) {
967: my ($area,$role)=split(/=/,$_);
968: $area=~s/\_\w\w$//;
969: my ($trole,$tend,$tstart)=split(/_/,$role);
970: $userroles.='user.role.'.$trole.'.'.$area.'='.
971: $tstart.'.'.$tend."\n";
972: if ($tend!=0) {
973: if ($tend<$now) {
974: $trole='';
975: }
976: }
977: if ($tstart!=0) {
978: if ($tstart>$now) {
979: $trole='';
980: }
981: }
982: if (($area ne '') && ($trole ne '')) {
983: my $spec=$trole.'.'.$area;
984: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
985: if ($trole =~ /^cr\//) {
986: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
987: my $homsvr=homeserver($rauthor,$rdomain);
988: if ($hostname{$homsvr} ne '') {
989: my $roledef=
990: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
991: $homsvr);
992: if (($roledef ne 'con_lost') && ($roledef ne '')) {
993: my ($syspriv,$dompriv,$coursepriv)=
994: split(/\_/,unescape($roledef));
995: $allroles{'cm./'}.=':'.$syspriv;
996: $allroles{$spec.'./'}.=':'.$syspriv;
997: if ($tdomain ne '') {
998: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
999: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1000: if ($trest ne '') {
1001: $allroles{'cm.'.$area}.=':'.$coursepriv;
1002: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1003: }
1004: }
1005: }
1006: }
1007: } else {
1008: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1009: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1010: if ($tdomain ne '') {
1011: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1012: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1013: if ($trest ne '') {
1014: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1015: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1016: }
1017: }
1018: }
1019: }
1020: }
1021: } split(/&/,$rolesdump);
1022: my $adv=0;
1023: my $author=0;
1024: map {
1025: %thesepriv=();
1026: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1027: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1028: map {
1029: if ($_ ne '') {
1030: my ($privilege,$restrictions)=split(/&/,$_);
1031: if ($restrictions eq '') {
1032: $thesepriv{$privilege}='F';
1033: } else {
1034: if ($thesepriv{$privilege} ne 'F') {
1035: $thesepriv{$privilege}.=$restrictions;
1036: }
1037: }
1038: }
1039: } split(/:/,$allroles{$_});
1040: $thesestr='';
1041: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
1042: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1043: } keys %allroles;
1044: $userroles.='user.adv='.$adv."\n".
1045: 'user.author='.$author."\n";
1046: $ENV{'user.adv'}=$adv;
1047: }
1048: return $userroles;
1049: }
1050:
1051: # --------------------------------------------------------------- get interface
1052:
1053: sub get {
1054: my ($namespace,$storearr,$udomain,$uname)=@_;
1055: my $items='';
1056: map {
1057: $items.=escape($_).'&';
1058: } @$storearr;
1059: $items=~s/\&$//;
1060: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1061: if (!$uname) { $uname=$ENV{'user.name'}; }
1062: my $uhome=&homeserver($uname,$udomain);
1063:
1064: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1065: my @pairs=split(/\&/,$rep);
1066: my %returnhash=();
1067: my $i=0;
1068: map {
1069: $returnhash{$_}=unescape($pairs[$i]);
1070: $i++;
1071: } @$storearr;
1072: return %returnhash;
1073: }
1074:
1075: # --------------------------------------------------------------- del interface
1076:
1077: sub del {
1078: my ($namespace,$storearr,$udomain,$uname)=@_;
1079: my $items='';
1080: map {
1081: $items.=escape($_).'&';
1082: } @$storearr;
1083: $items=~s/\&$//;
1084: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1085: if (!$uname) { $uname=$ENV{'user.name'}; }
1086: my $uhome=&homeserver($uname,$udomain);
1087:
1088: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1089: }
1090:
1091: # -------------------------------------------------------------- dump interface
1092:
1093: sub dump {
1094: my ($namespace,$udomain,$uname)=@_;
1095: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1096: if (!$uname) { $uname=$ENV{'user.name'}; }
1097: my $uhome=&homeserver($uname,$udomain);
1098: my $rep=reply("dump:$udomain:$uname:$namespace",$uhome);
1099: my @pairs=split(/\&/,$rep);
1100: my %returnhash=();
1101: map {
1102: my ($key,$value)=split(/=/,$_);
1103: $returnhash{unescape($key)}=unescape($value);
1104: } @pairs;
1105: return %returnhash;
1106: }
1107:
1108: # --------------------------------------------------------------- put interface
1109:
1110: sub put {
1111: my ($namespace,$storehash,$udomain,$uname)=@_;
1112: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1113: if (!$uname) { $uname=$ENV{'user.name'}; }
1114: my $uhome=&homeserver($uname,$udomain);
1115: my $items='';
1116: map {
1117: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1118: } keys %$storehash;
1119: $items=~s/\&$//;
1120: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1121: }
1122:
1123: # ------------------------------------------------------ critical put interface
1124:
1125: sub cput {
1126: my ($namespace,$storehash,$udomain,$uname)=@_;
1127: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1128: if (!$uname) { $uname=$ENV{'user.name'}; }
1129: my $uhome=&homeserver($uname,$udomain);
1130: my $items='';
1131: map {
1132: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1133: } keys %$storehash;
1134: $items=~s/\&$//;
1135: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1136: }
1137:
1138: # -------------------------------------------------------------- eget interface
1139:
1140: sub eget {
1141: my ($namespace,$storearr,$udomain,$uname)=@_;
1142: my $items='';
1143: map {
1144: $items.=escape($_).'&';
1145: } @$storearr;
1146: $items=~s/\&$//;
1147: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1148: if (!$uname) { $uname=$ENV{'user.name'}; }
1149: my $uhome=&homeserver($uname,$udomain);
1150: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1151: my @pairs=split(/\&/,$rep);
1152: my %returnhash=();
1153: my $i=0;
1154: map {
1155: $returnhash{$_}=unescape($pairs[$i]);
1156: $i++;
1157: } @$storearr;
1158: return %returnhash;
1159: }
1160:
1161: # ------------------------------------------------- Check for a user privilege
1162:
1163: sub allowed {
1164: my ($priv,$uri)=@_;
1165:
1166: my $orguri=$uri;
1167: $uri=&declutter($uri);
1168:
1169: # Free bre access to adm and meta resources
1170:
1171: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1172: return 'F';
1173: }
1174:
1175: my $thisallowed='';
1176: my $statecond=0;
1177: my $courseprivid='';
1178:
1179: # Course
1180:
1181: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1182: $thisallowed.=$1;
1183: }
1184:
1185: # Domain
1186:
1187: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1188: =~/$priv\&([^\:]*)/) {
1189: $thisallowed.=$1;
1190: }
1191:
1192: # Course: uri itself is a course
1193: my $courseuri=$uri;
1194: $courseuri=~s/\_(\d)/\/$1/;
1195: $courseuri=~s/^([^\/])/\/$1/;
1196:
1197: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1198: =~/$priv\&([^\:]*)/) {
1199: $thisallowed.=$1;
1200: }
1201:
1202: # Full access at system, domain or course-wide level? Exit.
1203:
1204: if ($thisallowed=~/F/) {
1205: return 'F';
1206: }
1207:
1208: # If this is generating or modifying users, exit with special codes
1209:
1210: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:'=~/\:$priv\:/) {
1211: return $thisallowed;
1212: }
1213: #
1214: # Gathered so far: system, domain and course wide privileges
1215: #
1216: # Course: See if uri or referer is an individual resource that is part of
1217: # the course
1218:
1219: if ($ENV{'request.course.id'}) {
1220: $courseprivid=$ENV{'request.course.id'};
1221: if ($ENV{'request.course.sec'}) {
1222: $courseprivid.='/'.$ENV{'request.course.sec'};
1223: }
1224: $courseprivid=~s/\_/\//;
1225: my $checkreferer=1;
1226: my @uriparts=split(/\//,$uri);
1227: my $filename=$uriparts[$#uriparts];
1228: my $pathname=$uri;
1229: $pathname=~s/\/$filename$//;
1230: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1231: /\&$filename\:([\d\|]+)\&/) {
1232: $statecond=$1;
1233: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1234: =~/$priv\&([^\:]*)/) {
1235: $thisallowed.=$1;
1236: $checkreferer=0;
1237: }
1238: }
1239:
1240: if ($checkreferer) {
1241: my $refuri=$ENV{'httpref.'.$orguri};
1242:
1243: unless ($refuri) {
1244: map {
1245: if ($_=~/^httpref\..*\*/) {
1246: my $pattern=$_;
1247: $pattern=~s/^httpref\.\/res\///;
1248: $pattern=~s/\*/\[\^\/\]\+/g;
1249: $pattern=~s/\//\\\//g;
1250: if ($orguri=~/$pattern/) {
1251: $refuri=$ENV{$_};
1252: }
1253: }
1254: } keys %ENV;
1255: }
1256: if ($refuri) {
1257: $refuri=&declutter($refuri);
1258: my @uriparts=split(/\//,$refuri);
1259: my $filename=$uriparts[$#uriparts];
1260: my $pathname=$refuri;
1261: $pathname=~s/\/$filename$//;
1262: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1263: /\&$filename\:([\d\|]+)\&/) {
1264: my $refstatecond=$1;
1265: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1266: =~/$priv\&([^\:]*)/) {
1267: $thisallowed.=$1;
1268: $uri=$refuri;
1269: $statecond=$refstatecond;
1270: }
1271: }
1272: }
1273: }
1274: }
1275:
1276: #
1277: # Gathered now: all privileges that could apply, and condition number
1278: #
1279: #
1280: # Full or no access?
1281: #
1282:
1283: if ($thisallowed=~/F/) {
1284: return 'F';
1285: }
1286:
1287: unless ($thisallowed) {
1288: return '';
1289: }
1290:
1291: # Restrictions exist, deal with them
1292: #
1293: # C:according to course preferences
1294: # R:according to resource settings
1295: # L:unless locked
1296: # X:according to user session state
1297: #
1298:
1299: # Possibly locked functionality, check all courses
1300: # Locks might take effect only after 10 minutes cache expiration for other
1301: # courses, and 2 minutes for current course
1302:
1303: my $envkey;
1304: if ($thisallowed=~/L/) {
1305: foreach $envkey (keys %ENV) {
1306: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1307: my $courseid=$2;
1308: my $roleid=$1.'.'.$2;
1309: $courseid=~s/^\///;
1310: my $expiretime=600;
1311: if ($ENV{'request.role'} eq $roleid) {
1312: $expiretime=120;
1313: }
1314: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1315: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1316: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1317: &coursedescription($courseid);
1318: }
1319: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1320: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1321: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1322: &log($ENV{'user.domain'},$ENV{'user.name'},
1323: $ENV{'user.host'},
1324: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1325: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1326: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1327: return '';
1328: }
1329: }
1330: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1331: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1332: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1333: &log($ENV{'user.domain'},$ENV{'user.name'},
1334: $ENV{'user.host'},
1335: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1336: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1337: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1338: return '';
1339: }
1340: }
1341: }
1342: }
1343: }
1344:
1345: #
1346: # Rest of the restrictions depend on selected course
1347: #
1348:
1349: unless ($ENV{'request.course.id'}) {
1350: return '1';
1351: }
1352:
1353: #
1354: # Now user is definitely in a course
1355: #
1356:
1357:
1358: # Course preferences
1359:
1360: if ($thisallowed=~/C/) {
1361: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1362: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1363: =~/\,$rolecode\,/) {
1364: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1365: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1366: $ENV{'request.course.id'});
1367: return '';
1368: }
1369: }
1370:
1371: # Resource preferences
1372:
1373: if ($thisallowed=~/R/) {
1374: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1375: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1376: if (-e $filename) {
1377: my @content;
1378: {
1379: my $fh=Apache::File->new($filename);
1380: @content=<$fh>;
1381: }
1382: if (join('',@content)=~
1383: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1384: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1385: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1386: return '';
1387:
1388: }
1389: }
1390: }
1391:
1392: # Restricted by state?
1393:
1394: if ($thisallowed=~/X/) {
1395: if (&condval($statecond)) {
1396: return '2';
1397: } else {
1398: return '';
1399: }
1400: }
1401:
1402: return 'F';
1403: }
1404:
1405: # ----------------------------------------------------------------- Define Role
1406:
1407: sub definerole {
1408: if (allowed('mcr','/')) {
1409: my ($rolename,$sysrole,$domrole,$courole)=@_;
1410: map {
1411: my ($crole,$cqual)=split(/\&/,$_);
1412: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1413: if ($pr{'cr:s'}=~/$crole\&/) {
1414: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1415: return "refused:s:$crole&$cqual";
1416: }
1417: }
1418: } split('/',$sysrole);
1419: map {
1420: my ($crole,$cqual)=split(/\&/,$_);
1421: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1422: if ($pr{'cr:d'}=~/$crole\&/) {
1423: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1424: return "refused:d:$crole&$cqual";
1425: }
1426: }
1427: } split('/',$domrole);
1428: map {
1429: my ($crole,$cqual)=split(/\&/,$_);
1430: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1431: if ($pr{'cr:c'}=~/$crole\&/) {
1432: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1433: return "refused:c:$crole&$cqual";
1434: }
1435: }
1436: } split('/',$courole);
1437: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1438: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1439: "rolesdef_$rolename=".
1440: escape($sysrole.'_'.$domrole.'_'.$courole);
1441: return reply($command,$ENV{'user.home'});
1442: } else {
1443: return 'refused';
1444: }
1445: }
1446:
1447: # ---------------- Make a metadata query against the network of library servers
1448:
1449: sub metadata_query {
1450: my ($query,$custom,$customshow)=@_;
1451: # need to put in a library server loop here and return a hash
1452: my %rhash;
1453: for my $server (keys %libserv) {
1454: unless ($custom or $customshow) {
1455: my $reply=&reply("querysend:".&escape($query),$server);
1456: $rhash{$server}=$reply;
1457: }
1458: else {
1459: my $reply=&reply("querysend:".&escape($query).':'.
1460: &escape($custom).':'.&escape($customshow),
1461: $server);
1462: $rhash{$server}=$reply;
1463: }
1464: }
1465: return \%rhash;
1466: }
1467:
1468: # ------------------------------------------------------------------ Plain Text
1469:
1470: sub plaintext {
1471: my $short=shift;
1472: return $prp{$short};
1473: }
1474:
1475: # ------------------------------------------------------------------ Plain Text
1476:
1477: sub fileembstyle {
1478: my $ending=shift;
1479: return $fe{$ending};
1480: }
1481:
1482: # ------------------------------------------------------------ Description Text
1483:
1484: sub filedescription {
1485: my $ending=shift;
1486: return $fd{$ending};
1487: }
1488:
1489: # ----------------------------------------------------------------- Assign Role
1490:
1491: sub assignrole {
1492: my ($udom,$uname,$url,$role,$end,$start)=@_;
1493: my $mrole;
1494: if ($role =~ /^cr\//) {
1495: unless (&allowed('ccr',$url)) {
1496: &logthis('Refused custom assignrole: '.
1497: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1498: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1499: return 'refused';
1500: }
1501: $mrole='cr';
1502: } else {
1503: my $cwosec=$url;
1504: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1505: unless (&allowed('c'.$role,$cwosec)) {
1506: &logthis('Refused assignrole: '.
1507: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1508: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1509: return 'refused';
1510: }
1511: $mrole=$role;
1512: }
1513: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1514: "$udom:$uname:$url".'_'."$mrole=$role";
1515: if ($end) { $command.='_'.$end; }
1516: if ($start) {
1517: if ($end) {
1518: $command.='_'.$start;
1519: } else {
1520: $command.='_0_'.$start;
1521: }
1522: }
1523: return &reply($command,&homeserver($uname,$udom));
1524: }
1525:
1526: # --------------------------------------------------------------- Modify a user
1527:
1528:
1529: sub modifyuser {
1530: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1531: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1532: $umode.', '.$first.', '.$middle.', '.
1533: $last.', '.$gene.' by '.
1534: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1535: my $uhome=&homeserver($uname,$udom);
1536: # ----------------------------------------------------------------- Create User
1537: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1538: my $unhome='';
1539: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1540: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1541: } else {
1542: my $tryserver;
1543: my $loadm=10000000;
1544: foreach $tryserver (keys %libserv) {
1545: if ($hostdom{$tryserver} eq $udom) {
1546: my $answer=reply('load',$tryserver);
1547: if (($answer=~/\d+/) && ($answer<$loadm)) {
1548: $loadm=$answer;
1549: $unhome=$tryserver;
1550: }
1551: }
1552: }
1553: }
1554: if (($unhome eq '') || ($unhome eq 'no_host')) {
1555: return 'error: find home';
1556: }
1557: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1558: &escape($upass),$unhome);
1559: unless ($reply eq 'ok') {
1560: return 'error: '.$reply;
1561: }
1562: $uhome=&homeserver($uname,$udom);
1563: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1564: return 'error: verify home';
1565: }
1566: }
1567: # ---------------------------------------------------------------------- Add ID
1568: if ($uid) {
1569: $uid=~tr/A-Z/a-z/;
1570: my %uidhash=&idrget($udom,$uname);
1571: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1572: unless ($uid eq $uidhash{$uname}) {
1573: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1574: }
1575: } else {
1576: &idput($udom,($uname => $uid));
1577: }
1578: }
1579: # -------------------------------------------------------------- Add names, etc
1580: my %names=&get('environment',
1581: ['firstname','middlename','lastname','generation'],
1582: $udom,$uname);
1583: if ($first) { $names{'firstname'} = $first; }
1584: if ($middle) { $names{'middlename'} = $middle; }
1585: if ($last) { $names{'lastname'} = $last; }
1586: if ($gene) { $names{'generation'} = $gene; }
1587: my $reply = &put('environment', \%names, $udom,$uname);
1588: if ($reply ne 'ok') { return 'error: '.$reply; }
1589: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1590: $umode.', '.$first.', '.$middle.', '.
1591: $last.', '.$gene.' by '.
1592: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1593: return 'ok';
1594: }
1595:
1596: # -------------------------------------------------------------- Modify student
1597:
1598: sub modifystudent {
1599: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1600: $end,$start)=@_;
1601: my $cid='';
1602: unless ($cid=$ENV{'request.course.id'}) {
1603: return 'not_in_class';
1604: }
1605: # --------------------------------------------------------------- Make the user
1606: my $reply=&modifyuser
1607: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1608: unless ($reply eq 'ok') { return $reply; }
1609: my $uhome=&homeserver($uname,$udom);
1610: if (($uhome eq '') || ($uhome eq 'no_host')) {
1611: return 'error: no such user';
1612: }
1613: # -------------------------------------------------- Add student to course list
1614: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1615: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1616: &escape($uname.':'.$udom).'='.
1617: &escape($end.':'.$start),
1618: $ENV{'course.'.$cid.'.home'});
1619: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1620: return 'error: '.$reply;
1621: }
1622: # ---------------------------------------------------- Add student role to user
1623: my $uurl='/'.$cid;
1624: $uurl=~s/\_/\//g;
1625: if ($usec) {
1626: $uurl.='/'.$usec;
1627: }
1628: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1629: }
1630:
1631: # ------------------------------------------------- Write to course preferences
1632:
1633: sub writecoursepref {
1634: my ($courseid,%prefs)=@_;
1635: $courseid=~s/^\///;
1636: $courseid=~s/\_/\//g;
1637: my ($cdomain,$cnum)=split(/\//,$courseid);
1638: my $chome=homeserver($cnum,$cdomain);
1639: if (($chome eq '') || ($chome eq 'no_host')) {
1640: return 'error: no such course';
1641: }
1642: my $cstring='';
1643: map {
1644: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1645: } keys %prefs;
1646: $cstring=~s/\&$//;
1647: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1648: }
1649:
1650: # ---------------------------------------------------------- Make/modify course
1651:
1652: sub createcourse {
1653: my ($udom,$description,$url)=@_;
1654: $url=&declutter($url);
1655: my $cid='';
1656: unless (&allowed('ccc',$ENV{'user.domain'})) {
1657: return 'refused';
1658: }
1659: unless ($udom eq $ENV{'user.domain'}) {
1660: return 'refused';
1661: }
1662: # ------------------------------------------------------------------- Create ID
1663: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1664: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1665: # ----------------------------------------------- Make sure that does not exist
1666: my $uhome=&homeserver($uname,$udom);
1667: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1668: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1669: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1670: $uhome=&homeserver($uname,$udom);
1671: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1672: return 'error: unable to generate unique course-ID';
1673: }
1674: }
1675: # ------------------------------------------------------------- Make the course
1676: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1677: $ENV{'user.home'});
1678: unless ($reply eq 'ok') { return 'error: '.$reply; }
1679: my $uhome=&homeserver($uname,$udom);
1680: if (($uhome eq '') || ($uhome eq 'no_host')) {
1681: return 'error: no such course';
1682: }
1683: &writecoursepref($udom.'_'.$uname,
1684: ('description' => $description,
1685: 'url' => $url));
1686: return '/'.$udom.'/'.$uname;
1687: }
1688:
1689: # ---------------------------------------------------------- Assign Custom Role
1690:
1691: sub assigncustomrole {
1692: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1693: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1694: $end,$start);
1695: }
1696:
1697: # ----------------------------------------------------------------- Revoke Role
1698:
1699: sub revokerole {
1700: my ($udom,$uname,$url,$role)=@_;
1701: my $now=time;
1702: return &assignrole($udom,$uname,$url,$role,$now);
1703: }
1704:
1705: # ---------------------------------------------------------- Revoke Custom Role
1706:
1707: sub revokecustomrole {
1708: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1709: my $now=time;
1710: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1711: }
1712:
1713: # ------------------------------------------------------------ Directory lister
1714:
1715: sub dirlist {
1716: my $uri=shift;
1717: $uri=~s/^\///;
1718: $uri=~s/\/$//;
1719: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1720: if ($udom) {
1721: if ($uname) {
1722: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1723: homeserver($uname,$udom));
1724: return split(/:/,$listing);
1725: } else {
1726: my $tryserver;
1727: my %allusers=();
1728: foreach $tryserver (keys %libserv) {
1729: if ($hostdom{$tryserver} eq $udom) {
1730: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1731: $tryserver);
1732: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1733: && ($listing ne 'con_lost')) {
1734: map {
1735: my ($entry,@stat)=split(/&/,$_);
1736: $allusers{$entry}=1;
1737: } split(/:/,$listing);
1738: }
1739: }
1740: }
1741: my $alluserstr='';
1742: map {
1743: $alluserstr.=$_.'&user:';
1744: } sort keys %allusers;
1745: $alluserstr=~s/:$//;
1746: return split(/:/,$alluserstr);
1747: }
1748: } else {
1749: my $tryserver;
1750: my %alldom=();
1751: foreach $tryserver (keys %libserv) {
1752: $alldom{$hostdom{$tryserver}}=1;
1753: }
1754: my $alldomstr='';
1755: map {
1756: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1757: } sort keys %alldom;
1758: $alldomstr=~s/:$//;
1759: return split(/:/,$alldomstr);
1760: }
1761: }
1762:
1763: # -------------------------------------------------------- Value of a Condition
1764:
1765: sub directcondval {
1766: my $number=shift;
1767: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1768: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1769: } else {
1770: return 2;
1771: }
1772: }
1773:
1774: sub condval {
1775: my $condidx=shift;
1776: my $result=0;
1777: my $allpathcond='';
1778: map {
1779: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
1780: $allpathcond.=
1781: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
1782: }
1783: } split(/\|/,$condidx);
1784: $allpathcond=~s/\|$//;
1785: if ($ENV{'request.course.id'}) {
1786: if ($allpathcond) {
1787: my $operand='|';
1788: my @stack;
1789: map {
1790: if ($_ eq '(') {
1791: push @stack,($operand,$result)
1792: } elsif ($_ eq ')') {
1793: my $before=pop @stack;
1794: if (pop @stack eq '&') {
1795: $result=$result>$before?$before:$result;
1796: } else {
1797: $result=$result>$before?$result:$before;
1798: }
1799: } elsif (($_ eq '&') || ($_ eq '|')) {
1800: $operand=$_;
1801: } else {
1802: my $new=directcondval($_);
1803: if ($operand eq '&') {
1804: $result=$result>$new?$new:$result;
1805: } else {
1806: $result=$result>$new?$result:$new;
1807: }
1808: }
1809: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
1810: }
1811: }
1812: return $result;
1813: }
1814:
1815: # --------------------------------------------------------- Value of a Variable
1816:
1817: sub EXT {
1818: my ($varname,$symbparm)=@_;
1819: unless ($varname) { return ''; }
1820: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
1821: my $rest;
1822: if ($therest[0]) {
1823: $rest=join('.',@therest);
1824: } else {
1825: $rest='';
1826: }
1827: my $qualifierrest=$qualifier;
1828: if ($rest) { $qualifierrest.='.'.$rest; }
1829: my $spacequalifierrest=$space;
1830: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1831: if ($realm eq 'user') {
1832: # --------------------------------------------------------------- user.resource
1833: if ($space eq 'resource') {
1834: my %restored=&restore();
1835: return $restored{$qualifierrest};
1836: # ----------------------------------------------------------------- user.access
1837: } elsif ($space eq 'access') {
1838: return &allowed($qualifier,$rest);
1839: # ------------------------------------------ user.preferences, user.environment
1840: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1841: return $ENV{join('.',('environment',$qualifierrest))};
1842: # ----------------------------------------------------------------- user.course
1843: } elsif ($space eq 'course') {
1844: return $ENV{join('.',('request.course',$qualifier))};
1845: # ------------------------------------------------------------------- user.role
1846: } elsif ($space eq 'role') {
1847: my ($role,$where)=split(/\./,$ENV{'request.role'});
1848: if ($qualifier eq 'value') {
1849: return $role;
1850: } elsif ($qualifier eq 'extent') {
1851: return $where;
1852: }
1853: # ----------------------------------------------------------------- user.domain
1854: } elsif ($space eq 'domain') {
1855: return $ENV{'user.domain'};
1856: # ------------------------------------------------------------------- user.name
1857: } elsif ($space eq 'name') {
1858: return $ENV{'user.name'};
1859: # ---------------------------------------------------- Any other user namespace
1860: } else {
1861: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
1862: my %reply=&get($space,[$item]);
1863: return $reply{$item};
1864: }
1865: } elsif ($realm eq 'request') {
1866: # ------------------------------------------------------------- request.browser
1867: if ($space eq 'browser') {
1868: return $ENV{'browser.'.$qualifier};
1869: # ------------------------------------------------------------ request.filename
1870: } else {
1871: return $ENV{'request.'.$spacequalifierrest};
1872: }
1873: } elsif ($realm eq 'course') {
1874: # ---------------------------------------------------------- course.description
1875: return $ENV{'course.'.$ENV{'request.course.id'}.'.'.
1876: $spacequalifierrest};
1877: } elsif ($realm eq 'resource') {
1878: if ($ENV{'request.course.id'}) {
1879:
1880: # print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
1881:
1882:
1883: # ----------------------------------------------------- Cascading lookup scheme
1884: my $symbp;
1885: if ($symbparm) {
1886: $symbp=$symbparm;
1887: } else {
1888: $symbp=&symbread();
1889: }
1890: my $mapp=(split(/\_\_\_/,$symbp))[0];
1891:
1892: my $symbparm=$symbp.'.'.$spacequalifierrest;
1893: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
1894:
1895: my $seclevel=
1896: $ENV{'request.course.id'}.'.['.
1897: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
1898: my $seclevelr=
1899: $ENV{'request.course.id'}.'.['.
1900: $ENV{'request.course.sec'}.'].'.$symbparm;
1901: my $seclevelm=
1902: $ENV{'request.course.id'}.'.['.
1903: $ENV{'request.course.sec'}.'].'.$mapparm;
1904:
1905: my $courselevel=
1906: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
1907: my $courselevelr=
1908: $ENV{'request.course.id'}.'.'.$symbparm;
1909: my $courselevelm=
1910: $ENV{'request.course.id'}.'.'.$mapparm;
1911:
1912: # ----------------------------------------------------------- first, check user
1913: my %resourcedata=get('resourcedata',
1914: [$courselevelr,$courselevelm,$courselevel]);
1915: if (($resourcedata{$courselevelr}!~/^error\:/) &&
1916: ($resourcedata{$courselevelr}!~/^con_lost/)) {
1917:
1918: if ($resourcedata{$courselevelr}) {
1919: return $resourcedata{$courselevelr}; }
1920: if ($resourcedata{$courselevelm}) {
1921: return $resourcedata{$courselevelm}; }
1922: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
1923:
1924: } else {
1925: if ($resourcedata{$courselevelr}!~/No such file/) {
1926: &logthis("<font color=blue>WARNING:".
1927: " Trying to get resource data for ".$ENV{'user.name'}." at "
1928: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
1929: "</font>");
1930: }
1931: }
1932:
1933: # -------------------------------------------------------- second, check course
1934:
1935: my $reply=&reply('get:'.
1936: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
1937: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1938: ':resourcedata:'.
1939: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
1940: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
1941: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
1942: if ($reply!~/^error\:/) {
1943: map {
1944: if ($_) { return &unescape($_); }
1945: } split(/\&/,$reply);
1946: }
1947: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
1948: &logthis("<font color=blue>WARNING:".
1949: " Getting ".$reply." asking for ".$varname." for ".
1950: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
1951: ' at '.
1952: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
1953: ' from '.
1954: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
1955: "</font>");
1956: }
1957: # ------------------------------------------------------ third, check map parms
1958: my %parmhash=();
1959: my $thisparm='';
1960: if (tie(%parmhash,'GDBM_File',
1961: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
1962: $thisparm=$parmhash{$symbparm};
1963: untie(%parmhash);
1964: }
1965: if ($thisparm) { return $thisparm; }
1966: }
1967:
1968: # --------------------------------------------- last, look in resource metadata
1969:
1970: $spacequalifierrest=~s/\./\_/;
1971: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
1972: if ($metadata) { return $metadata; }
1973: $metadata=&metadata($ENV{'request.filename'},
1974: 'parameter_'.$spacequalifierrest);
1975: if ($metadata) { return $metadata; }
1976:
1977: # ------------------------------------------------------------------ Cascade up
1978:
1979: unless ($space eq '0') {
1980: my ($part,$id)=split(/\_/,$space);
1981: if ($id) {
1982: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
1983: $symbparm);
1984: if ($partgeneral) { return $partgeneral; }
1985: } else {
1986: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
1987: $symbparm);
1988: if ($resourcegeneral) { return $resourcegeneral; }
1989: }
1990: }
1991:
1992: # ---------------------------------------------------- Any other user namespace
1993: } elsif ($realm eq 'environment') {
1994: # ----------------------------------------------------------------- environment
1995: return $ENV{'environment.'.$spacequalifierrest};
1996: } elsif ($realm eq 'system') {
1997: # ----------------------------------------------------------------- system.time
1998: if ($space eq 'time') {
1999: return time;
2000: }
2001: }
2002: return '';
2003: }
2004:
2005: # ---------------------------------------------------------------- Get metadata
2006:
2007: sub metadata {
2008: my ($uri,$what)=@_;
2009:
2010: $uri=&declutter($uri);
2011: my $filename=$uri;
2012: $uri=~s/\.meta$//;
2013: unless ($metacache{$uri.':keys'}) {
2014: my %metathesekeys=();
2015: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2016: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2017: my $parser=HTML::TokeParser->new(\$metastring);
2018: my $token;
2019: undef %metathesekeys;
2020: while ($token=$parser->get_token) {
2021: if ($token->[0] eq 'S') {
2022: if (defined($token->[2]->{'package'})) {
2023: my $package=$token->[2]->{'package'};
2024: my $keyroot='';
2025: if (defined($token->[2]->{'part'})) {
2026: $keyroot.='_'.$token->[2]->{'part'};
2027: }
2028: if (defined($token->[2]->{'id'})) {
2029: $keyroot.='_'.$token->[2]->{'id'};
2030: }
2031: if ($metacache{$uri.':packages'}) {
2032: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2033: } else {
2034: $metacache{$uri.':packages'}=$package.$keyroot;
2035: }
2036: map {
2037: if ($_=~/^$package\&/) {
2038: my ($pack,$name,$subp)=split(/\&/,$_);
2039: my $value=$packagetab{$_};
2040: my $part=$keyroot;
2041: $part=~s/^\_//;
2042: if ($subp eq 'display') {
2043: $value.=' [Part: '.$part.']';
2044: }
2045: my $unikey='parameter'.$keyroot.'_'.$name;
2046: $metathesekeys{$unikey}=1;
2047: $metacache{$uri.':'.$unikey.'.part'}=$part;
2048: unless
2049: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2050: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2051: }
2052: }
2053: } keys %packagetab;
2054: } else {
2055: my $entry=$token->[1];
2056: my $unikey=$entry;
2057: if (defined($token->[2]->{'part'})) {
2058: $unikey.='_'.$token->[2]->{'part'};
2059: }
2060: if (defined($token->[2]->{'id'})) {
2061: $unikey.='_'.$token->[2]->{'id'};
2062: }
2063: if (defined($token->[2]->{'name'})) {
2064: $unikey.='_'.$token->[2]->{'name'};
2065: }
2066: $metathesekeys{$unikey}=1;
2067: map {
2068: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2069: } @{$token->[3]};
2070: unless (
2071: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
2072: ) { $metacache{$uri.':'.$unikey}=
2073: $metacache{$uri.':'.$unikey.'.default'};
2074: }
2075: }
2076: }
2077: }
2078: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2079: }
2080: return $metacache{$uri.':'.$what};
2081: }
2082:
2083: # ------------------------------------------------- Update symbolic store links
2084:
2085: sub symblist {
2086: my ($mapname,%newhash)=@_;
2087: $mapname=declutter($mapname);
2088: my %hash;
2089: if (($ENV{'request.course.fn'}) && (%newhash)) {
2090: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2091: &GDBM_WRCREAT,0640)) {
2092: map {
2093: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2094: } keys %newhash;
2095: if (untie(%hash)) {
2096: return 'ok';
2097: }
2098: }
2099: }
2100: return 'error';
2101: }
2102:
2103: # ------------------------------------------------------ Return symb list entry
2104:
2105: sub symbread {
2106: my $thisfn=shift;
2107: unless ($thisfn) {
2108: $thisfn=$ENV{'request.filename'};
2109: }
2110: $thisfn=declutter($thisfn);
2111: my %hash;
2112: my %bighash;
2113: my $syval='';
2114: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2115: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2116: &GDBM_READER,0640)) {
2117: $syval=$hash{$thisfn};
2118: untie(%hash);
2119: }
2120: # ---------------------------------------------------------- There was an entry
2121: if ($syval) {
2122: unless ($syval=~/\_\d+$/) {
2123: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2124: &appenv('request.ambiguous' => $thisfn);
2125: return '';
2126: }
2127: $syval.=$1;
2128: }
2129: } else {
2130: # ------------------------------------------------------- Was not in symb table
2131: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2132: &GDBM_READER,0640)) {
2133: # ---------------------------------------------- Get ID(s) for current resource
2134: my $ids=$bighash{'ids_/res/'.$thisfn};
2135: unless ($ids) {
2136: $ids=$bighash{'ids_/'.$thisfn};
2137: }
2138: if ($ids) {
2139: # ------------------------------------------------------------------- Has ID(s)
2140: my @possibilities=split(/\,/,$ids);
2141: if ($#possibilities==0) {
2142: # ----------------------------------------------- There is only one possibility
2143: my ($mapid,$resid)=split(/\./,$ids);
2144: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2145: } else {
2146: # ------------------------------------------ There is more than one possibility
2147: my $realpossible=0;
2148: map {
2149: my $file=$bighash{'src_'.$_};
2150: if (&allowed('bre',$file)) {
2151: my ($mapid,$resid)=split(/\./,$_);
2152: if ($bighash{'map_type_'.$mapid} ne 'page') {
2153: $realpossible++;
2154: $syval=declutter($bighash{'map_id_'.$mapid}).
2155: '___'.$resid;
2156: }
2157: }
2158: } @possibilities;
2159: if ($realpossible!=1) { $syval=''; }
2160: }
2161: }
2162: untie(%bighash)
2163: }
2164: }
2165: if ($syval) {
2166: return $syval.'___'.$thisfn;
2167: }
2168: }
2169: &appenv('request.ambiguous' => $thisfn);
2170: return '';
2171: }
2172:
2173: # ---------------------------------------------------------- Return random seed
2174:
2175: sub numval {
2176: my $txt=shift;
2177: $txt=~tr/A-J/0-9/;
2178: $txt=~tr/a-j/0-9/;
2179: $txt=~tr/K-T/0-9/;
2180: $txt=~tr/k-t/0-9/;
2181: $txt=~tr/U-Z/0-5/;
2182: $txt=~tr/u-z/0-5/;
2183: $txt=~s/\D//g;
2184: return int($txt);
2185: }
2186:
2187: sub rndseed {
2188: my ($symb,$courseid,$domain,$username)=@_;
2189: if (!$symb) {
2190: unless ($symb=&symbread()) { return time; }
2191: }
2192: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2193: if (!$domain) {$domain=$ENV{'user.domain'};}
2194: if (!$username) {$username=$ENV{'user.name'};}
2195: {
2196: use integer;
2197: my $symbchck=unpack("%32C*",$symb) << 27;
2198: my $symbseed=numval($symb) << 22;
2199: my $namechck=unpack("%32C*",$username) << 17;
2200: my $nameseed=numval($username) << 12;
2201: my $domainseed=unpack("%32C*",$domain) << 7;
2202: my $courseseed=unpack("%32C*",$courseid);
2203: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2204: #uncommenting these lines can break things!
2205: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2206: #&Apache::lonxml::debug("rndseed :$num:$symb");
2207: return $num;
2208: }
2209: }
2210:
2211: sub ireceipt {
2212: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2213: my $cuname=unpack("%32C*",$funame);
2214: my $cudom=unpack("%32C*",$fudom);
2215: my $cucourseid=unpack("%32C*",$fucourseid);
2216: my $cusymb=unpack("%32C*",$fusymb);
2217: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2218: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2219: ($cunique%$cuname+
2220: $cunique%$cudom+
2221: $cusymb%$cuname+
2222: $cusymb%$cudom+
2223: $cucourseid%$cuname+
2224: $cucourseid%$cudom);
2225: }
2226:
2227: sub receipt {
2228: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2229: $ENV{'request.course.id'},&symbread());
2230: }
2231:
2232: # ------------------------------------------------------------ Serves up a file
2233: # returns either the contents of the file or a -1
2234: sub getfile {
2235: my $file=shift;
2236: &repcopy($file);
2237: if (! -e $file ) { return -1; };
2238: my $fh=Apache::File->new($file);
2239: my $a='';
2240: while (<$fh>) { $a .=$_; }
2241: return $a
2242: }
2243:
2244: sub filelocation {
2245: my ($dir,$file) = @_;
2246: my $location;
2247: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2248: if ($file=~m:^/~:) { # is a contruction space reference
2249: $location = $file;
2250: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2251: } else {
2252: $file=~s/^$perlvar{'lonDocRoot'}//;
2253: $file=~s:^/*res::;
2254: if ( !( $file =~ m:^/:) ) {
2255: $location = $dir. '/'.$file;
2256: } else {
2257: $location = '/home/httpd/html/res'.$file;
2258: }
2259: }
2260: $location=~s://+:/:g; # remove duplicate /
2261: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2262: return $location;
2263: }
2264:
2265: sub hreflocation {
2266: my ($dir,$file)=@_;
2267: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
2268: my $finalpath=filelocation($dir,$file);
2269: $finalpath=~s/^\/home\/httpd\/html//;
2270: return $finalpath;
2271: } else {
2272: return $file;
2273: }
2274: }
2275:
2276: # ------------------------------------------------------------- Declutters URLs
2277:
2278: sub declutter {
2279: my $thisfn=shift;
2280: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2281: $thisfn=~s/^\///;
2282: $thisfn=~s/^res\///;
2283: return $thisfn;
2284: }
2285:
2286: # -------------------------------------------------------- Escape Special Chars
2287:
2288: sub escape {
2289: my $str=shift;
2290: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2291: return $str;
2292: }
2293:
2294: # ----------------------------------------------------- Un-Escape Special Chars
2295:
2296: sub unescape {
2297: my $str=shift;
2298: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2299: return $str;
2300: }
2301:
2302: # ================================================================ Main Program
2303:
2304: sub BEGIN {
2305: if ($readit ne 'done') {
2306: # ------------------------------------------------------------ Read access.conf
2307: {
2308: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2309:
2310: while (my $configline=<$config>) {
2311: if ($configline =~ /PerlSetVar/) {
2312: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2313: chomp($varvalue);
2314: $perlvar{$varname}=$varvalue;
2315: }
2316: }
2317: }
2318:
2319: # ------------------------------------------------------------- Read hosts file
2320: {
2321: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2322:
2323: while (my $configline=<$config>) {
2324: chomp($configline);
2325: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2326: $hostname{$id}=$name;
2327: $hostdom{$id}=$domain;
2328: $hostip{$id}=$ip;
2329: if ($role eq 'library') { $libserv{$id}=$name; }
2330: }
2331: }
2332:
2333: # ------------------------------------------------------ Read spare server file
2334: {
2335: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2336:
2337: while (my $configline=<$config>) {
2338: chomp($configline);
2339: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2340: $spareid{$configline}=1;
2341: }
2342: }
2343: }
2344: # ------------------------------------------------------------ Read permissions
2345: {
2346: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2347:
2348: while (my $configline=<$config>) {
2349: chomp($configline);
2350: my ($role,$perm)=split(/ /,$configline);
2351: if ($perm ne '') { $pr{$role}=$perm; }
2352: }
2353: }
2354:
2355: # -------------------------------------------- Read plain texts for permissions
2356: {
2357: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2358:
2359: while (my $configline=<$config>) {
2360: chomp($configline);
2361: my ($short,$plain)=split(/:/,$configline);
2362: if ($plain ne '') { $prp{$short}=$plain; }
2363: }
2364: }
2365:
2366: # ---------------------------------------------------------- Read package table
2367: {
2368: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
2369:
2370: while (my $configline=<$config>) {
2371: chomp($configline);
2372: my ($short,$plain)=split(/:/,$configline);
2373: my ($pack,$name)=split(/\&/,$short);
2374: if ($plain ne '') {
2375: $packagetab{$pack.'&'.$name.'&name'}=$name;
2376: $packagetab{$short}=$plain;
2377: }
2378: }
2379: }
2380:
2381: # ------------------------------------------------------------- Read file types
2382: {
2383: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2384:
2385: while (my $configline=<$config>) {
2386: chomp($configline);
2387: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2388: if ($descr[0] ne '') {
2389: $fe{$ending}=$emb;
2390: $fd{$ending}=join(' ',@descr);
2391: }
2392: }
2393: }
2394:
2395: %metacache=();
2396:
2397: $readit='done';
2398: &logthis('<font color=yellow>INFO: Read configuration</font>');
2399: }
2400: }
2401: 1;
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