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